17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 55b024a5bSbatschul * Common Development and Distribution License (the "License"). 65b024a5bSbatschul * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21342440ecSPrasad Singamsetty 227c478bd9Sstevel@tonic-gate /* 239b5097eeSOwen Roberts * Copyright (c) 1984, 2010, Oracle and/or its affiliates. All rights reserved. 24284ce987SPatrick Mooney * Copyright 2018 Joyent, Inc. 2548bbca81SDaniel Hoffman * Copyright (c) 2016 by Delphix. All rights reserved. 267c478bd9Sstevel@tonic-gate */ 277c478bd9Sstevel@tonic-gate 287c478bd9Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 29*2575b441SToomas Soome /* All Rights Reserved */ 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate /* 327c478bd9Sstevel@tonic-gate * Portions of this source code were derived from Berkeley 4.3 BSD 337c478bd9Sstevel@tonic-gate * under license from the Regents of the University of California. 347c478bd9Sstevel@tonic-gate */ 357c478bd9Sstevel@tonic-gate 367c478bd9Sstevel@tonic-gate #include <sys/types.h> 377c478bd9Sstevel@tonic-gate #include <sys/t_lock.h> 387c478bd9Sstevel@tonic-gate #include <sys/ksynch.h> 397c478bd9Sstevel@tonic-gate #include <sys/param.h> 407c478bd9Sstevel@tonic-gate #include <sys/time.h> 417c478bd9Sstevel@tonic-gate #include <sys/systm.h> 427c478bd9Sstevel@tonic-gate #include <sys/sysmacros.h> 437c478bd9Sstevel@tonic-gate #include <sys/resource.h> 447c478bd9Sstevel@tonic-gate #include <sys/signal.h> 457c478bd9Sstevel@tonic-gate #include <sys/cred.h> 467c478bd9Sstevel@tonic-gate #include <sys/user.h> 477c478bd9Sstevel@tonic-gate #include <sys/buf.h> 487c478bd9Sstevel@tonic-gate #include <sys/vfs.h> 49aa59c4cbSrsb #include <sys/vfs_opreg.h> 507c478bd9Sstevel@tonic-gate #include <sys/vnode.h> 517c478bd9Sstevel@tonic-gate #include <sys/proc.h> 527c478bd9Sstevel@tonic-gate #include <sys/disp.h> 537c478bd9Sstevel@tonic-gate #include <sys/file.h> 547c478bd9Sstevel@tonic-gate #include <sys/fcntl.h> 557c478bd9Sstevel@tonic-gate #include <sys/flock.h> 56bc69f433Saguzovsk #include <sys/atomic.h> 577c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 587c478bd9Sstevel@tonic-gate #include <sys/uio.h> 597c478bd9Sstevel@tonic-gate #include <sys/dnlc.h> 607c478bd9Sstevel@tonic-gate #include <sys/conf.h> 617c478bd9Sstevel@tonic-gate #include <sys/mman.h> 627c478bd9Sstevel@tonic-gate #include <sys/pathname.h> 637c478bd9Sstevel@tonic-gate #include <sys/debug.h> 647c478bd9Sstevel@tonic-gate #include <sys/vmsystm.h> 657c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h> 667c478bd9Sstevel@tonic-gate #include <sys/filio.h> 677c478bd9Sstevel@tonic-gate #include <sys/policy.h> 687c478bd9Sstevel@tonic-gate 697c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_fs.h> 707c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_lockfs.h> 717c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_filio.h> 727c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_inode.h> 737c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_fsdir.h> 747c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_quota.h> 757c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_log.h> 767c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_snap.h> 777c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_trans.h> 787c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_panic.h> 797c478bd9Sstevel@tonic-gate #include <sys/fs/ufs_bio.h> 807c478bd9Sstevel@tonic-gate #include <sys/dirent.h> /* must be AFTER <sys/fs/fsdir.h>! */ 817c478bd9Sstevel@tonic-gate #include <sys/errno.h> 827c478bd9Sstevel@tonic-gate #include <sys/fssnap_if.h> 837c478bd9Sstevel@tonic-gate #include <sys/unistd.h> 847c478bd9Sstevel@tonic-gate #include <sys/sunddi.h> 857c478bd9Sstevel@tonic-gate 867c478bd9Sstevel@tonic-gate #include <sys/filio.h> /* _FIOIO */ 877c478bd9Sstevel@tonic-gate 887c478bd9Sstevel@tonic-gate #include <vm/hat.h> 897c478bd9Sstevel@tonic-gate #include <vm/page.h> 907c478bd9Sstevel@tonic-gate #include <vm/pvn.h> 917c478bd9Sstevel@tonic-gate #include <vm/as.h> 927c478bd9Sstevel@tonic-gate #include <vm/seg.h> 937c478bd9Sstevel@tonic-gate #include <vm/seg_map.h> 947c478bd9Sstevel@tonic-gate #include <vm/seg_vn.h> 957c478bd9Sstevel@tonic-gate #include <vm/seg_kmem.h> 967c478bd9Sstevel@tonic-gate #include <vm/rm.h> 977c478bd9Sstevel@tonic-gate #include <sys/swap.h> 987c478bd9Sstevel@tonic-gate 997c478bd9Sstevel@tonic-gate #include <fs/fs_subr.h> 1007c478bd9Sstevel@tonic-gate 101986fd29aSsetje #include <sys/fs/decomp.h> 102986fd29aSsetje 1037c478bd9Sstevel@tonic-gate static struct instats ins; 1047c478bd9Sstevel@tonic-gate 105*2575b441SToomas Soome static int ufs_getpage_ra(struct vnode *, u_offset_t, struct seg *, caddr_t); 1067c478bd9Sstevel@tonic-gate static int ufs_getpage_miss(struct vnode *, u_offset_t, size_t, struct seg *, 1077c478bd9Sstevel@tonic-gate caddr_t, struct page **, size_t, enum seg_rw, int); 108da6c28aaSamw static int ufs_open(struct vnode **, int, struct cred *, caller_context_t *); 109da6c28aaSamw static int ufs_close(struct vnode *, int, int, offset_t, struct cred *, 110da6c28aaSamw caller_context_t *); 1117c478bd9Sstevel@tonic-gate static int ufs_read(struct vnode *, struct uio *, int, struct cred *, 112da6c28aaSamw struct caller_context *); 1137c478bd9Sstevel@tonic-gate static int ufs_write(struct vnode *, struct uio *, int, struct cred *, 114da6c28aaSamw struct caller_context *); 115da6c28aaSamw static int ufs_ioctl(struct vnode *, int, intptr_t, int, struct cred *, 116da6c28aaSamw int *, caller_context_t *); 117da6c28aaSamw static int ufs_getattr(struct vnode *, struct vattr *, int, struct cred *, 118da6c28aaSamw caller_context_t *); 1197c478bd9Sstevel@tonic-gate static int ufs_setattr(struct vnode *, struct vattr *, int, struct cred *, 120da6c28aaSamw caller_context_t *); 121da6c28aaSamw static int ufs_access(struct vnode *, int, int, struct cred *, 122da6c28aaSamw caller_context_t *); 1237c478bd9Sstevel@tonic-gate static int ufs_lookup(struct vnode *, char *, struct vnode **, 124da6c28aaSamw struct pathname *, int, struct vnode *, struct cred *, 125da6c28aaSamw caller_context_t *, int *, pathname_t *); 1267c478bd9Sstevel@tonic-gate static int ufs_create(struct vnode *, char *, struct vattr *, enum vcexcl, 127da6c28aaSamw int, struct vnode **, struct cred *, int, 128da6c28aaSamw caller_context_t *, vsecattr_t *); 129da6c28aaSamw static int ufs_remove(struct vnode *, char *, struct cred *, 130da6c28aaSamw caller_context_t *, int); 131da6c28aaSamw static int ufs_link(struct vnode *, struct vnode *, char *, struct cred *, 132da6c28aaSamw caller_context_t *, int); 1337c478bd9Sstevel@tonic-gate static int ufs_rename(struct vnode *, char *, struct vnode *, char *, 134da6c28aaSamw struct cred *, caller_context_t *, int); 1357c478bd9Sstevel@tonic-gate static int ufs_mkdir(struct vnode *, char *, struct vattr *, struct vnode **, 136da6c28aaSamw struct cred *, caller_context_t *, int, vsecattr_t *); 137da6c28aaSamw static int ufs_rmdir(struct vnode *, char *, struct vnode *, struct cred *, 138da6c28aaSamw caller_context_t *, int); 139da6c28aaSamw static int ufs_readdir(struct vnode *, struct uio *, struct cred *, int *, 140da6c28aaSamw caller_context_t *, int); 1417c478bd9Sstevel@tonic-gate static int ufs_symlink(struct vnode *, char *, struct vattr *, char *, 142da6c28aaSamw struct cred *, caller_context_t *, int); 143da6c28aaSamw static int ufs_readlink(struct vnode *, struct uio *, struct cred *, 144da6c28aaSamw caller_context_t *); 145da6c28aaSamw static int ufs_fsync(struct vnode *, int, struct cred *, caller_context_t *); 146da6c28aaSamw static void ufs_inactive(struct vnode *, struct cred *, caller_context_t *); 147da6c28aaSamw static int ufs_fid(struct vnode *, struct fid *, caller_context_t *); 1487c478bd9Sstevel@tonic-gate static int ufs_rwlock(struct vnode *, int, caller_context_t *); 1497c478bd9Sstevel@tonic-gate static void ufs_rwunlock(struct vnode *, int, caller_context_t *); 150da6c28aaSamw static int ufs_seek(struct vnode *, offset_t, offset_t *, caller_context_t *); 1517c478bd9Sstevel@tonic-gate static int ufs_frlock(struct vnode *, int, struct flock64 *, int, offset_t, 152da6c28aaSamw struct flk_callback *, struct cred *, 153da6c28aaSamw caller_context_t *); 1547c478bd9Sstevel@tonic-gate static int ufs_space(struct vnode *, int, struct flock64 *, int, offset_t, 1557c478bd9Sstevel@tonic-gate cred_t *, caller_context_t *); 1567c478bd9Sstevel@tonic-gate static int ufs_getpage(struct vnode *, offset_t, size_t, uint_t *, 1577c478bd9Sstevel@tonic-gate struct page **, size_t, struct seg *, caddr_t, 158da6c28aaSamw enum seg_rw, struct cred *, caller_context_t *); 159da6c28aaSamw static int ufs_putpage(struct vnode *, offset_t, size_t, int, struct cred *, 160da6c28aaSamw caller_context_t *); 1617c478bd9Sstevel@tonic-gate static int ufs_putpages(struct vnode *, offset_t, size_t, int, struct cred *); 1627c478bd9Sstevel@tonic-gate static int ufs_map(struct vnode *, offset_t, struct as *, caddr_t *, size_t, 163da6c28aaSamw uchar_t, uchar_t, uint_t, struct cred *, caller_context_t *); 1647c478bd9Sstevel@tonic-gate static int ufs_addmap(struct vnode *, offset_t, struct as *, caddr_t, size_t, 165da6c28aaSamw uchar_t, uchar_t, uint_t, struct cred *, caller_context_t *); 1667c478bd9Sstevel@tonic-gate static int ufs_delmap(struct vnode *, offset_t, struct as *, caddr_t, size_t, 167da6c28aaSamw uint_t, uint_t, uint_t, struct cred *, caller_context_t *); 168da6c28aaSamw static int ufs_poll(vnode_t *, short, int, short *, struct pollhead **, 169da6c28aaSamw caller_context_t *); 170d7334e51Srm static int ufs_dump(vnode_t *, caddr_t, offset_t, offset_t, 171d7334e51Srm caller_context_t *); 172da6c28aaSamw static int ufs_l_pathconf(struct vnode *, int, ulong_t *, struct cred *, 173da6c28aaSamw caller_context_t *); 1747c478bd9Sstevel@tonic-gate static int ufs_pageio(struct vnode *, struct page *, u_offset_t, size_t, int, 175da6c28aaSamw struct cred *, caller_context_t *); 176d7334e51Srm static int ufs_dumpctl(vnode_t *, int, offset_t *, caller_context_t *); 1777c478bd9Sstevel@tonic-gate static daddr32_t *save_dblks(struct inode *, struct ufsvfs *, daddr32_t *, 178da6c28aaSamw daddr32_t *, int, int); 179da6c28aaSamw static int ufs_getsecattr(struct vnode *, vsecattr_t *, int, struct cred *, 180da6c28aaSamw caller_context_t *); 181da6c28aaSamw static int ufs_setsecattr(struct vnode *, vsecattr_t *, int, struct cred *, 182da6c28aaSamw caller_context_t *); 18360c8e821SFrank Batschulat static int ufs_priv_access(void *, int, struct cred *); 1849b5097eeSOwen Roberts static int ufs_eventlookup(struct vnode *, char *, struct cred *, 1859b5097eeSOwen Roberts struct vnode **); 18602ff05a9Svsakar 1877c478bd9Sstevel@tonic-gate /* 1887c478bd9Sstevel@tonic-gate * For lockfs: ulockfs begin/end is now inlined in the ufs_xxx functions. 1897c478bd9Sstevel@tonic-gate * 1907c478bd9Sstevel@tonic-gate * XXX - ULOCKFS in fs_pathconf and ufs_ioctl is not inlined yet. 1917c478bd9Sstevel@tonic-gate */ 1927c478bd9Sstevel@tonic-gate struct vnodeops *ufs_vnodeops; 1937c478bd9Sstevel@tonic-gate 194aa59c4cbSrsb /* NOTE: "not blkd" below means that the operation isn't blocked by lockfs */ 1957c478bd9Sstevel@tonic-gate const fs_operation_def_t ufs_vnodeops_template[] = { 196aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = ufs_open }, /* not blkd */ 197aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = ufs_close }, /* not blkd */ 198aa59c4cbSrsb VOPNAME_READ, { .vop_read = ufs_read }, 199aa59c4cbSrsb VOPNAME_WRITE, { .vop_write = ufs_write }, 200aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = ufs_ioctl }, 201aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = ufs_getattr }, 202aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = ufs_setattr }, 203aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = ufs_access }, 204aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = ufs_lookup }, 205aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = ufs_create }, 206aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = ufs_remove }, 207aa59c4cbSrsb VOPNAME_LINK, { .vop_link = ufs_link }, 208aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = ufs_rename }, 209aa59c4cbSrsb VOPNAME_MKDIR, { .vop_mkdir = ufs_mkdir }, 210aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = ufs_rmdir }, 211aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = ufs_readdir }, 212aa59c4cbSrsb VOPNAME_SYMLINK, { .vop_symlink = ufs_symlink }, 213aa59c4cbSrsb VOPNAME_READLINK, { .vop_readlink = ufs_readlink }, 214aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = ufs_fsync }, 215aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = ufs_inactive }, /* not blkd */ 216aa59c4cbSrsb VOPNAME_FID, { .vop_fid = ufs_fid }, 217aa59c4cbSrsb VOPNAME_RWLOCK, { .vop_rwlock = ufs_rwlock }, /* not blkd */ 218aa59c4cbSrsb VOPNAME_RWUNLOCK, { .vop_rwunlock = ufs_rwunlock }, /* not blkd */ 219aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = ufs_seek }, 220aa59c4cbSrsb VOPNAME_FRLOCK, { .vop_frlock = ufs_frlock }, 221aa59c4cbSrsb VOPNAME_SPACE, { .vop_space = ufs_space }, 222aa59c4cbSrsb VOPNAME_GETPAGE, { .vop_getpage = ufs_getpage }, 223aa59c4cbSrsb VOPNAME_PUTPAGE, { .vop_putpage = ufs_putpage }, 224aa59c4cbSrsb VOPNAME_MAP, { .vop_map = ufs_map }, 225aa59c4cbSrsb VOPNAME_ADDMAP, { .vop_addmap = ufs_addmap }, /* not blkd */ 226aa59c4cbSrsb VOPNAME_DELMAP, { .vop_delmap = ufs_delmap }, /* not blkd */ 227aa59c4cbSrsb VOPNAME_POLL, { .vop_poll = ufs_poll }, /* not blkd */ 228aa59c4cbSrsb VOPNAME_DUMP, { .vop_dump = ufs_dump }, 229aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = ufs_l_pathconf }, 230aa59c4cbSrsb VOPNAME_PAGEIO, { .vop_pageio = ufs_pageio }, 231aa59c4cbSrsb VOPNAME_DUMPCTL, { .vop_dumpctl = ufs_dumpctl }, 232aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = ufs_getsecattr }, 233aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = ufs_setsecattr }, 234aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 235aa59c4cbSrsb NULL, NULL 2367c478bd9Sstevel@tonic-gate }; 2377c478bd9Sstevel@tonic-gate 2387c478bd9Sstevel@tonic-gate #define MAX_BACKFILE_COUNT 9999 2397c478bd9Sstevel@tonic-gate 2407c478bd9Sstevel@tonic-gate /* 2417c478bd9Sstevel@tonic-gate * Created by ufs_dumpctl() to store a file's disk block info into memory. 2427c478bd9Sstevel@tonic-gate * Used by ufs_dump() to dump data to disk directly. 2437c478bd9Sstevel@tonic-gate */ 2447c478bd9Sstevel@tonic-gate struct dump { 2457c478bd9Sstevel@tonic-gate struct inode *ip; /* the file we contain */ 2467c478bd9Sstevel@tonic-gate daddr_t fsbs; /* number of blocks stored */ 2477c478bd9Sstevel@tonic-gate struct timeval32 time; /* time stamp for the struct */ 248*2575b441SToomas Soome daddr32_t dblk[1]; /* place holder for block info */ 2497c478bd9Sstevel@tonic-gate }; 2507c478bd9Sstevel@tonic-gate 2517c478bd9Sstevel@tonic-gate static struct dump *dump_info = NULL; 2527c478bd9Sstevel@tonic-gate 2537c478bd9Sstevel@tonic-gate /* 2547c478bd9Sstevel@tonic-gate * Previously there was no special action required for ordinary files. 2557c478bd9Sstevel@tonic-gate * (Devices are handled through the device file system.) 2567c478bd9Sstevel@tonic-gate * Now we support Large Files and Large File API requires open to 2577c478bd9Sstevel@tonic-gate * fail if file is large. 2587c478bd9Sstevel@tonic-gate * We could take care to prevent data corruption 2597c478bd9Sstevel@tonic-gate * by doing an atomic check of size and truncate if file is opened with 2607c478bd9Sstevel@tonic-gate * FTRUNC flag set but traditionally this is being done by the vfs/vnode 2617c478bd9Sstevel@tonic-gate * layers. So taking care of truncation here is a change in the existing 2627c478bd9Sstevel@tonic-gate * semantics of VOP_OPEN and therefore we chose not to implement any thing 2637c478bd9Sstevel@tonic-gate * here. The check for the size of the file > 2GB is being done at the 2647c478bd9Sstevel@tonic-gate * vfs layer in routine vn_open(). 2657c478bd9Sstevel@tonic-gate */ 2667c478bd9Sstevel@tonic-gate 2677c478bd9Sstevel@tonic-gate /* ARGSUSED */ 2687c478bd9Sstevel@tonic-gate static int 269da6c28aaSamw ufs_open(struct vnode **vpp, int flag, struct cred *cr, caller_context_t *ct) 2707c478bd9Sstevel@tonic-gate { 2717c478bd9Sstevel@tonic-gate return (0); 2727c478bd9Sstevel@tonic-gate } 2737c478bd9Sstevel@tonic-gate 2747c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 2757c478bd9Sstevel@tonic-gate static int 2767c478bd9Sstevel@tonic-gate ufs_close(struct vnode *vp, int flag, int count, offset_t offset, 27780d5689fSPatrick Mooney struct cred *cr, caller_context_t *ct) 2787c478bd9Sstevel@tonic-gate { 2797c478bd9Sstevel@tonic-gate cleanlocks(vp, ttoproc(curthread)->p_pid, 0); 2807c478bd9Sstevel@tonic-gate cleanshares(vp, ttoproc(curthread)->p_pid); 2817c478bd9Sstevel@tonic-gate 2827c478bd9Sstevel@tonic-gate /* 2837c478bd9Sstevel@tonic-gate * Push partially filled cluster at last close. 2847c478bd9Sstevel@tonic-gate * ``last close'' is approximated because the dnlc 2857c478bd9Sstevel@tonic-gate * may have a hold on the vnode. 2867c478bd9Sstevel@tonic-gate * Checking for VBAD here will also act as a forced umount check. 2877c478bd9Sstevel@tonic-gate */ 2887c478bd9Sstevel@tonic-gate if (vp->v_count <= 2 && vp->v_type != VBAD) { 2897c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 2907c478bd9Sstevel@tonic-gate if (ip->i_delaylen) { 2917c478bd9Sstevel@tonic-gate ins.in_poc.value.ul++; 2927c478bd9Sstevel@tonic-gate (void) ufs_putpages(vp, ip->i_delayoff, ip->i_delaylen, 29380d34432Sfrankho B_ASYNC | B_FREE, cr); 2947c478bd9Sstevel@tonic-gate ip->i_delaylen = 0; 2957c478bd9Sstevel@tonic-gate } 2967c478bd9Sstevel@tonic-gate } 2977c478bd9Sstevel@tonic-gate 2987c478bd9Sstevel@tonic-gate return (0); 2997c478bd9Sstevel@tonic-gate } 3007c478bd9Sstevel@tonic-gate 3017c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 3027c478bd9Sstevel@tonic-gate static int 3037c478bd9Sstevel@tonic-gate ufs_read(struct vnode *vp, struct uio *uiop, int ioflag, struct cred *cr, 30480d5689fSPatrick Mooney struct caller_context *ct) 3057c478bd9Sstevel@tonic-gate { 3067c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 3077c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 3087c478bd9Sstevel@tonic-gate struct ulockfs *ulp = NULL; 3097c478bd9Sstevel@tonic-gate int error = 0; 3107c478bd9Sstevel@tonic-gate int intrans = 0; 3117c478bd9Sstevel@tonic-gate 3127c478bd9Sstevel@tonic-gate ASSERT(RW_READ_HELD(&ip->i_rwlock)); 3137c478bd9Sstevel@tonic-gate 3147c478bd9Sstevel@tonic-gate /* 3157c478bd9Sstevel@tonic-gate * Mandatory locking needs to be done before ufs_lockfs_begin() 3167c478bd9Sstevel@tonic-gate * and TRANS_BEGIN_SYNC() calls since mandatory locks can sleep. 3177c478bd9Sstevel@tonic-gate */ 3187c478bd9Sstevel@tonic-gate if (MANDLOCK(vp, ip->i_mode)) { 3197c478bd9Sstevel@tonic-gate /* 3207c478bd9Sstevel@tonic-gate * ufs_getattr ends up being called by chklock 3217c478bd9Sstevel@tonic-gate */ 3227c478bd9Sstevel@tonic-gate error = chklock(vp, FREAD, uiop->uio_loffset, 32380d34432Sfrankho uiop->uio_resid, uiop->uio_fmode, ct); 3247c478bd9Sstevel@tonic-gate if (error) 3257c478bd9Sstevel@tonic-gate goto out; 3267c478bd9Sstevel@tonic-gate } 3277c478bd9Sstevel@tonic-gate 3287c478bd9Sstevel@tonic-gate ufsvfsp = ip->i_ufsvfs; 3297c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_READ_MASK); 3307c478bd9Sstevel@tonic-gate if (error) 3317c478bd9Sstevel@tonic-gate goto out; 3327c478bd9Sstevel@tonic-gate 3337c478bd9Sstevel@tonic-gate /* 3347c478bd9Sstevel@tonic-gate * In the case that a directory is opened for reading as a file 3357c478bd9Sstevel@tonic-gate * (eg "cat .") with the O_RSYNC, O_SYNC and O_DSYNC flags set. 3367c478bd9Sstevel@tonic-gate * The locking order had to be changed to avoid a deadlock with 3377c478bd9Sstevel@tonic-gate * an update taking place on that directory at the same time. 3387c478bd9Sstevel@tonic-gate */ 3397c478bd9Sstevel@tonic-gate if ((ip->i_mode & IFMT) == IFDIR) { 3407c478bd9Sstevel@tonic-gate 3417c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 3427c478bd9Sstevel@tonic-gate error = rdip(ip, uiop, ioflag, cr); 3437c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 3447c478bd9Sstevel@tonic-gate 3457c478bd9Sstevel@tonic-gate if (error) { 3467c478bd9Sstevel@tonic-gate if (ulp) 3477c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 3487c478bd9Sstevel@tonic-gate goto out; 3497c478bd9Sstevel@tonic-gate } 3507c478bd9Sstevel@tonic-gate 3517c478bd9Sstevel@tonic-gate if (ulp && (ioflag & FRSYNC) && (ioflag & (FSYNC | FDSYNC)) && 3527c478bd9Sstevel@tonic-gate TRANS_ISTRANS(ufsvfsp)) { 3537c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 3547c478bd9Sstevel@tonic-gate TRANS_BEGIN_SYNC(ufsvfsp, TOP_READ_SYNC, TOP_READ_SIZE, 3557c478bd9Sstevel@tonic-gate error); 3567c478bd9Sstevel@tonic-gate ASSERT(!error); 3577c478bd9Sstevel@tonic-gate TRANS_END_SYNC(ufsvfsp, error, TOP_READ_SYNC, 3587c478bd9Sstevel@tonic-gate TOP_READ_SIZE); 3597c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_READER); 3607c478bd9Sstevel@tonic-gate } 3617c478bd9Sstevel@tonic-gate } else { 3627c478bd9Sstevel@tonic-gate /* 3637c478bd9Sstevel@tonic-gate * Only transact reads to files opened for sync-read and 3647c478bd9Sstevel@tonic-gate * sync-write on a file system that is not write locked. 3657c478bd9Sstevel@tonic-gate * 3667c478bd9Sstevel@tonic-gate * The ``not write locked'' check prevents problems with 3677c478bd9Sstevel@tonic-gate * enabling/disabling logging on a busy file system. E.g., 3687c478bd9Sstevel@tonic-gate * logging exists at the beginning of the read but does not 3697c478bd9Sstevel@tonic-gate * at the end. 3707c478bd9Sstevel@tonic-gate * 3717c478bd9Sstevel@tonic-gate */ 3727c478bd9Sstevel@tonic-gate if (ulp && (ioflag & FRSYNC) && (ioflag & (FSYNC | FDSYNC)) && 3737c478bd9Sstevel@tonic-gate TRANS_ISTRANS(ufsvfsp)) { 3747c478bd9Sstevel@tonic-gate TRANS_BEGIN_SYNC(ufsvfsp, TOP_READ_SYNC, TOP_READ_SIZE, 3757c478bd9Sstevel@tonic-gate error); 3767c478bd9Sstevel@tonic-gate ASSERT(!error); 3777c478bd9Sstevel@tonic-gate intrans = 1; 3787c478bd9Sstevel@tonic-gate } 3797c478bd9Sstevel@tonic-gate 3807c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 3817c478bd9Sstevel@tonic-gate error = rdip(ip, uiop, ioflag, cr); 3827c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 3837c478bd9Sstevel@tonic-gate 3847c478bd9Sstevel@tonic-gate if (intrans) { 3857c478bd9Sstevel@tonic-gate TRANS_END_SYNC(ufsvfsp, error, TOP_READ_SYNC, 3867c478bd9Sstevel@tonic-gate TOP_READ_SIZE); 3877c478bd9Sstevel@tonic-gate } 3887c478bd9Sstevel@tonic-gate } 3897c478bd9Sstevel@tonic-gate 3907c478bd9Sstevel@tonic-gate if (ulp) { 3917c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 3927c478bd9Sstevel@tonic-gate } 3937c478bd9Sstevel@tonic-gate out: 3947c478bd9Sstevel@tonic-gate 3957c478bd9Sstevel@tonic-gate return (error); 3967c478bd9Sstevel@tonic-gate } 3977c478bd9Sstevel@tonic-gate 3987c478bd9Sstevel@tonic-gate extern int ufs_HW; /* high water mark */ 3997c478bd9Sstevel@tonic-gate extern int ufs_LW; /* low water mark */ 4007c478bd9Sstevel@tonic-gate int ufs_WRITES = 1; /* XXX - enable/disable */ 4017c478bd9Sstevel@tonic-gate int ufs_throttles = 0; /* throttling count */ 4027c478bd9Sstevel@tonic-gate int ufs_allow_shared_writes = 1; /* directio shared writes */ 4037c478bd9Sstevel@tonic-gate 4047c478bd9Sstevel@tonic-gate static int 4057c478bd9Sstevel@tonic-gate ufs_check_rewrite(struct inode *ip, struct uio *uiop, int ioflag) 4067c478bd9Sstevel@tonic-gate { 407f90bab20Sswilcox int shared_write; 408f90bab20Sswilcox 409f90bab20Sswilcox /* 410f90bab20Sswilcox * If the FDSYNC flag is set then ignore the global 411f90bab20Sswilcox * ufs_allow_shared_writes in this case. 412f90bab20Sswilcox */ 413f90bab20Sswilcox shared_write = (ioflag & FDSYNC) | ufs_allow_shared_writes; 4147c478bd9Sstevel@tonic-gate 4157c478bd9Sstevel@tonic-gate /* 4167c478bd9Sstevel@tonic-gate * Filter to determine if this request is suitable as a 4177c478bd9Sstevel@tonic-gate * concurrent rewrite. This write must not allocate blocks 4187c478bd9Sstevel@tonic-gate * by extending the file or filling in holes. No use trying 4197c478bd9Sstevel@tonic-gate * through FSYNC descriptors as the inode will be synchronously 4207c478bd9Sstevel@tonic-gate * updated after the write. The uio structure has not yet been 4217c478bd9Sstevel@tonic-gate * checked for sanity, so assume nothing. 4227c478bd9Sstevel@tonic-gate */ 4237c478bd9Sstevel@tonic-gate return (((ip->i_mode & IFMT) == IFREG) && !(ioflag & FAPPEND) && 42480d34432Sfrankho (uiop->uio_loffset >= (offset_t)0) && 42580d34432Sfrankho (uiop->uio_loffset < ip->i_size) && (uiop->uio_resid > 0) && 42680d34432Sfrankho ((ip->i_size - uiop->uio_loffset) >= uiop->uio_resid) && 42780d34432Sfrankho !(ioflag & FSYNC) && !bmap_has_holes(ip) && 42880d34432Sfrankho shared_write); 4297c478bd9Sstevel@tonic-gate } 4307c478bd9Sstevel@tonic-gate 4317c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 4327c478bd9Sstevel@tonic-gate static int 4337c478bd9Sstevel@tonic-gate ufs_write(struct vnode *vp, struct uio *uiop, int ioflag, cred_t *cr, 43480d5689fSPatrick Mooney caller_context_t *ct) 4357c478bd9Sstevel@tonic-gate { 4367c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 4377c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 4387c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 4397c478bd9Sstevel@tonic-gate int retry = 1; 4407c478bd9Sstevel@tonic-gate int error, resv, resid = 0; 4417c478bd9Sstevel@tonic-gate int directio_status; 4427c478bd9Sstevel@tonic-gate int exclusive; 443f90bab20Sswilcox int rewriteflg; 4447c478bd9Sstevel@tonic-gate long start_resid = uiop->uio_resid; 4457c478bd9Sstevel@tonic-gate 4467c478bd9Sstevel@tonic-gate ASSERT(RW_LOCK_HELD(&ip->i_rwlock)); 4477c478bd9Sstevel@tonic-gate 4487c478bd9Sstevel@tonic-gate retry_mandlock: 4497c478bd9Sstevel@tonic-gate /* 4507c478bd9Sstevel@tonic-gate * Mandatory locking needs to be done before ufs_lockfs_begin() 4517c478bd9Sstevel@tonic-gate * and TRANS_BEGIN_[A]SYNC() calls since mandatory locks can sleep. 4527c478bd9Sstevel@tonic-gate * Check for forced unmounts normally done in ufs_lockfs_begin(). 4537c478bd9Sstevel@tonic-gate */ 4547c478bd9Sstevel@tonic-gate if ((ufsvfsp = ip->i_ufsvfs) == NULL) { 4557c478bd9Sstevel@tonic-gate error = EIO; 4567c478bd9Sstevel@tonic-gate goto out; 4577c478bd9Sstevel@tonic-gate } 4587c478bd9Sstevel@tonic-gate if (MANDLOCK(vp, ip->i_mode)) { 4597c478bd9Sstevel@tonic-gate 4607c478bd9Sstevel@tonic-gate ASSERT(RW_WRITE_HELD(&ip->i_rwlock)); 4617c478bd9Sstevel@tonic-gate 4627c478bd9Sstevel@tonic-gate /* 4637c478bd9Sstevel@tonic-gate * ufs_getattr ends up being called by chklock 4647c478bd9Sstevel@tonic-gate */ 4657c478bd9Sstevel@tonic-gate error = chklock(vp, FWRITE, uiop->uio_loffset, 46680d34432Sfrankho uiop->uio_resid, uiop->uio_fmode, ct); 4677c478bd9Sstevel@tonic-gate if (error) 4687c478bd9Sstevel@tonic-gate goto out; 4697c478bd9Sstevel@tonic-gate } 4707c478bd9Sstevel@tonic-gate 4717c478bd9Sstevel@tonic-gate /* i_rwlock can change in chklock */ 4727c478bd9Sstevel@tonic-gate exclusive = rw_write_held(&ip->i_rwlock); 473f90bab20Sswilcox rewriteflg = ufs_check_rewrite(ip, uiop, ioflag); 4747c478bd9Sstevel@tonic-gate 4757c478bd9Sstevel@tonic-gate /* 4767c478bd9Sstevel@tonic-gate * Check for fast-path special case of directio re-writes. 4777c478bd9Sstevel@tonic-gate */ 4787c478bd9Sstevel@tonic-gate if ((ip->i_flag & IDIRECTIO || ufsvfsp->vfs_forcedirectio) && 479f90bab20Sswilcox !exclusive && rewriteflg) { 4807c478bd9Sstevel@tonic-gate 4817c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_WRITE_MASK); 4827c478bd9Sstevel@tonic-gate if (error) 4837c478bd9Sstevel@tonic-gate goto out; 4847c478bd9Sstevel@tonic-gate 4857c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 4867c478bd9Sstevel@tonic-gate error = ufs_directio_write(ip, uiop, ioflag, 1, cr, 48780d34432Sfrankho &directio_status); 4887c478bd9Sstevel@tonic-gate if (directio_status == DIRECTIO_SUCCESS) { 4897c478bd9Sstevel@tonic-gate uint_t i_flag_save; 4907c478bd9Sstevel@tonic-gate 4917c478bd9Sstevel@tonic-gate if (start_resid != uiop->uio_resid) 4927c478bd9Sstevel@tonic-gate error = 0; 4937c478bd9Sstevel@tonic-gate /* 4947c478bd9Sstevel@tonic-gate * Special treatment of access times for re-writes. 4957c478bd9Sstevel@tonic-gate * If IMOD is not already set, then convert it 4967c478bd9Sstevel@tonic-gate * to IMODACC for this operation. This defers 4977c478bd9Sstevel@tonic-gate * entering a delta into the log until the inode 4987c478bd9Sstevel@tonic-gate * is flushed. This mimics what is done for read 4997c478bd9Sstevel@tonic-gate * operations and inode access time. 5007c478bd9Sstevel@tonic-gate */ 5017c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 5027c478bd9Sstevel@tonic-gate i_flag_save = ip->i_flag; 5037c478bd9Sstevel@tonic-gate ip->i_flag |= IUPD | ICHG; 5047c478bd9Sstevel@tonic-gate ip->i_seq++; 5057c478bd9Sstevel@tonic-gate ITIMES_NOLOCK(ip); 5067c478bd9Sstevel@tonic-gate if ((i_flag_save & IMOD) == 0) { 5077c478bd9Sstevel@tonic-gate ip->i_flag &= ~IMOD; 5087c478bd9Sstevel@tonic-gate ip->i_flag |= IMODACC; 5097c478bd9Sstevel@tonic-gate } 5107c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 5117c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 5127c478bd9Sstevel@tonic-gate if (ulp) 5137c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 5147c478bd9Sstevel@tonic-gate goto out; 5157c478bd9Sstevel@tonic-gate } 5167c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 5177c478bd9Sstevel@tonic-gate if (ulp) 5187c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 5197c478bd9Sstevel@tonic-gate } 5207c478bd9Sstevel@tonic-gate 5217c478bd9Sstevel@tonic-gate if (!exclusive && !rw_tryupgrade(&ip->i_rwlock)) { 5227c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 5237c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_WRITER); 5247c478bd9Sstevel@tonic-gate /* 5257c478bd9Sstevel@tonic-gate * Mandatory locking could have been enabled 5267c478bd9Sstevel@tonic-gate * after dropping the i_rwlock. 5277c478bd9Sstevel@tonic-gate */ 5287c478bd9Sstevel@tonic-gate if (MANDLOCK(vp, ip->i_mode)) 5297c478bd9Sstevel@tonic-gate goto retry_mandlock; 5307c478bd9Sstevel@tonic-gate } 5317c478bd9Sstevel@tonic-gate 5327c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_WRITE_MASK); 5337c478bd9Sstevel@tonic-gate if (error) 5347c478bd9Sstevel@tonic-gate goto out; 5357c478bd9Sstevel@tonic-gate 5367c478bd9Sstevel@tonic-gate /* 5377c478bd9Sstevel@tonic-gate * Amount of log space needed for this write 5387c478bd9Sstevel@tonic-gate */ 539f90bab20Sswilcox if (!rewriteflg || !(ioflag & FDSYNC)) 540f90bab20Sswilcox TRANS_WRITE_RESV(ip, uiop, ulp, &resv, &resid); 5417c478bd9Sstevel@tonic-gate 5427c478bd9Sstevel@tonic-gate /* 5437c478bd9Sstevel@tonic-gate * Throttle writes. 5447c478bd9Sstevel@tonic-gate */ 5457c478bd9Sstevel@tonic-gate if (ufs_WRITES && (ip->i_writes > ufs_HW)) { 5467c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 5477c478bd9Sstevel@tonic-gate while (ip->i_writes > ufs_HW) { 5487c478bd9Sstevel@tonic-gate ufs_throttles++; 5497c478bd9Sstevel@tonic-gate cv_wait(&ip->i_wrcv, &ip->i_tlock); 5507c478bd9Sstevel@tonic-gate } 5517c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 5527c478bd9Sstevel@tonic-gate } 5537c478bd9Sstevel@tonic-gate 5547c478bd9Sstevel@tonic-gate /* 5557c478bd9Sstevel@tonic-gate * Enter Transaction 556f90bab20Sswilcox * 557f90bab20Sswilcox * If the write is a rewrite there is no need to open a transaction 558f90bab20Sswilcox * if the FDSYNC flag is set and not the FSYNC. In this case just 559f90bab20Sswilcox * set the IMODACC flag to modify do the update at a later time 560f90bab20Sswilcox * thus avoiding the overhead of the logging transaction that is 561f90bab20Sswilcox * not required. 5627c478bd9Sstevel@tonic-gate */ 5637c478bd9Sstevel@tonic-gate if (ioflag & (FSYNC|FDSYNC)) { 5647c478bd9Sstevel@tonic-gate if (ulp) { 565f90bab20Sswilcox if (rewriteflg) { 566f90bab20Sswilcox uint_t i_flag_save; 567f90bab20Sswilcox 568f90bab20Sswilcox rw_enter(&ip->i_contents, RW_READER); 569f90bab20Sswilcox mutex_enter(&ip->i_tlock); 570f90bab20Sswilcox i_flag_save = ip->i_flag; 571f90bab20Sswilcox ip->i_flag |= IUPD | ICHG; 572f90bab20Sswilcox ip->i_seq++; 573f90bab20Sswilcox ITIMES_NOLOCK(ip); 574f90bab20Sswilcox if ((i_flag_save & IMOD) == 0) { 575f90bab20Sswilcox ip->i_flag &= ~IMOD; 576f90bab20Sswilcox ip->i_flag |= IMODACC; 577f90bab20Sswilcox } 578f90bab20Sswilcox mutex_exit(&ip->i_tlock); 579f90bab20Sswilcox rw_exit(&ip->i_contents); 580f90bab20Sswilcox } else { 581f90bab20Sswilcox int terr = 0; 582f90bab20Sswilcox TRANS_BEGIN_SYNC(ufsvfsp, TOP_WRITE_SYNC, resv, 583f90bab20Sswilcox terr); 584f90bab20Sswilcox ASSERT(!terr); 585f90bab20Sswilcox } 5867c478bd9Sstevel@tonic-gate } 5877c478bd9Sstevel@tonic-gate } else { 5887c478bd9Sstevel@tonic-gate if (ulp) 5897c478bd9Sstevel@tonic-gate TRANS_BEGIN_ASYNC(ufsvfsp, TOP_WRITE, resv); 5907c478bd9Sstevel@tonic-gate } 5917c478bd9Sstevel@tonic-gate 5927c478bd9Sstevel@tonic-gate /* 5937c478bd9Sstevel@tonic-gate * Write the file 5947c478bd9Sstevel@tonic-gate */ 5957c478bd9Sstevel@tonic-gate rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 5967c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 5977c478bd9Sstevel@tonic-gate if ((ioflag & FAPPEND) != 0 && (ip->i_mode & IFMT) == IFREG) { 5987c478bd9Sstevel@tonic-gate /* 5997c478bd9Sstevel@tonic-gate * In append mode start at end of file. 6007c478bd9Sstevel@tonic-gate */ 6017c478bd9Sstevel@tonic-gate uiop->uio_loffset = ip->i_size; 6027c478bd9Sstevel@tonic-gate } 6037c478bd9Sstevel@tonic-gate 6047c478bd9Sstevel@tonic-gate /* 6057c478bd9Sstevel@tonic-gate * Mild optimisation, don't call ufs_trans_write() unless we have to 6067c478bd9Sstevel@tonic-gate * Also, suppress file system full messages if we will retry. 6077c478bd9Sstevel@tonic-gate */ 6087c478bd9Sstevel@tonic-gate if (retry) 6097c478bd9Sstevel@tonic-gate ip->i_flag |= IQUIET; 6107c478bd9Sstevel@tonic-gate if (resid) { 6117c478bd9Sstevel@tonic-gate TRANS_WRITE(ip, uiop, ioflag, error, ulp, cr, resv, resid); 6127c478bd9Sstevel@tonic-gate } else { 6137c478bd9Sstevel@tonic-gate error = wrip(ip, uiop, ioflag, cr); 6147c478bd9Sstevel@tonic-gate } 6157c478bd9Sstevel@tonic-gate ip->i_flag &= ~IQUIET; 6167c478bd9Sstevel@tonic-gate 6177c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 6187c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 6197c478bd9Sstevel@tonic-gate 6207c478bd9Sstevel@tonic-gate /* 6217c478bd9Sstevel@tonic-gate * Leave Transaction 6227c478bd9Sstevel@tonic-gate */ 6237c478bd9Sstevel@tonic-gate if (ulp) { 6247c478bd9Sstevel@tonic-gate if (ioflag & (FSYNC|FDSYNC)) { 625f90bab20Sswilcox if (!rewriteflg) { 626f90bab20Sswilcox int terr = 0; 627f90bab20Sswilcox 628f90bab20Sswilcox TRANS_END_SYNC(ufsvfsp, terr, TOP_WRITE_SYNC, 62980d34432Sfrankho resv); 630f90bab20Sswilcox if (error == 0) 631f90bab20Sswilcox error = terr; 632f90bab20Sswilcox } 6337c478bd9Sstevel@tonic-gate } else { 6347c478bd9Sstevel@tonic-gate TRANS_END_ASYNC(ufsvfsp, TOP_WRITE, resv); 6357c478bd9Sstevel@tonic-gate } 6367c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 6377c478bd9Sstevel@tonic-gate } 6387c478bd9Sstevel@tonic-gate out: 6397c478bd9Sstevel@tonic-gate if ((error == ENOSPC) && retry && TRANS_ISTRANS(ufsvfsp)) { 6407c478bd9Sstevel@tonic-gate /* 6417c478bd9Sstevel@tonic-gate * Any blocks tied up in pending deletes? 6427c478bd9Sstevel@tonic-gate */ 6437c478bd9Sstevel@tonic-gate ufs_delete_drain_wait(ufsvfsp, 1); 6447c478bd9Sstevel@tonic-gate retry = 0; 6457c478bd9Sstevel@tonic-gate goto retry_mandlock; 6467c478bd9Sstevel@tonic-gate } 6477c478bd9Sstevel@tonic-gate 6487c478bd9Sstevel@tonic-gate if (error == ENOSPC && (start_resid != uiop->uio_resid)) 6497c478bd9Sstevel@tonic-gate error = 0; 6507c478bd9Sstevel@tonic-gate 6517c478bd9Sstevel@tonic-gate return (error); 6527c478bd9Sstevel@tonic-gate } 6537c478bd9Sstevel@tonic-gate 6547c478bd9Sstevel@tonic-gate /* 6557c478bd9Sstevel@tonic-gate * Don't cache write blocks to files with the sticky bit set. 6567c478bd9Sstevel@tonic-gate * Used to keep swap files from blowing the page cache on a server. 6577c478bd9Sstevel@tonic-gate */ 6587c478bd9Sstevel@tonic-gate int stickyhack = 1; 6597c478bd9Sstevel@tonic-gate 6607c478bd9Sstevel@tonic-gate /* 6617c478bd9Sstevel@tonic-gate * wrip does the real work of write requests for ufs. 6627c478bd9Sstevel@tonic-gate */ 6637c478bd9Sstevel@tonic-gate int 6647c478bd9Sstevel@tonic-gate wrip(struct inode *ip, struct uio *uio, int ioflag, struct cred *cr) 6657c478bd9Sstevel@tonic-gate { 6667c478bd9Sstevel@tonic-gate rlim64_t limit = uio->uio_llimit; 6677c478bd9Sstevel@tonic-gate u_offset_t off; 6687c478bd9Sstevel@tonic-gate u_offset_t old_i_size; 6697c478bd9Sstevel@tonic-gate struct fs *fs; 6707c478bd9Sstevel@tonic-gate struct vnode *vp; 6717c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 6727c478bd9Sstevel@tonic-gate caddr_t base; 6737c478bd9Sstevel@tonic-gate long start_resid = uio->uio_resid; /* save starting resid */ 6747c478bd9Sstevel@tonic-gate long premove_resid; /* resid before uiomove() */ 6757c478bd9Sstevel@tonic-gate uint_t flags; 6767c478bd9Sstevel@tonic-gate int newpage; 6777c478bd9Sstevel@tonic-gate int iupdat_flag, directio_status; 6787c478bd9Sstevel@tonic-gate int n, on, mapon; 6797c478bd9Sstevel@tonic-gate int error, pagecreate; 6807c478bd9Sstevel@tonic-gate int do_dqrwlock; /* drop/reacquire vfs_dqrwlock */ 6817c478bd9Sstevel@tonic-gate int32_t iblocks; 6827c478bd9Sstevel@tonic-gate int new_iblocks; 6837c478bd9Sstevel@tonic-gate 6847c478bd9Sstevel@tonic-gate /* 6857c478bd9Sstevel@tonic-gate * ip->i_size is incremented before the uiomove 6867c478bd9Sstevel@tonic-gate * is done on a write. If the move fails (bad user 6877c478bd9Sstevel@tonic-gate * address) reset ip->i_size. 6887c478bd9Sstevel@tonic-gate * The better way would be to increment ip->i_size 6897c478bd9Sstevel@tonic-gate * only if the uiomove succeeds. 6907c478bd9Sstevel@tonic-gate */ 6917c478bd9Sstevel@tonic-gate int i_size_changed = 0; 6927c478bd9Sstevel@tonic-gate o_mode_t type; 6937c478bd9Sstevel@tonic-gate int i_seq_needed = 0; 6947c478bd9Sstevel@tonic-gate 6957c478bd9Sstevel@tonic-gate vp = ITOV(ip); 6967c478bd9Sstevel@tonic-gate 6977c478bd9Sstevel@tonic-gate /* 6987c478bd9Sstevel@tonic-gate * check for forced unmount - should not happen as 6997c478bd9Sstevel@tonic-gate * the request passed the lockfs checks. 7007c478bd9Sstevel@tonic-gate */ 7017c478bd9Sstevel@tonic-gate if ((ufsvfsp = ip->i_ufsvfs) == NULL) 7027c478bd9Sstevel@tonic-gate return (EIO); 7037c478bd9Sstevel@tonic-gate 7047c478bd9Sstevel@tonic-gate fs = ip->i_fs; 7057c478bd9Sstevel@tonic-gate 7067c478bd9Sstevel@tonic-gate ASSERT(RW_WRITE_HELD(&ip->i_contents)); 7077c478bd9Sstevel@tonic-gate 7087c478bd9Sstevel@tonic-gate /* check for valid filetype */ 7097c478bd9Sstevel@tonic-gate type = ip->i_mode & IFMT; 7107c478bd9Sstevel@tonic-gate if ((type != IFREG) && (type != IFDIR) && (type != IFATTRDIR) && 7117c478bd9Sstevel@tonic-gate (type != IFLNK) && (type != IFSHAD)) { 7127c478bd9Sstevel@tonic-gate return (EIO); 7137c478bd9Sstevel@tonic-gate } 7147c478bd9Sstevel@tonic-gate 7157c478bd9Sstevel@tonic-gate /* 7167c478bd9Sstevel@tonic-gate * the actual limit of UFS file size 7177c478bd9Sstevel@tonic-gate * is UFS_MAXOFFSET_T 7187c478bd9Sstevel@tonic-gate */ 7197c478bd9Sstevel@tonic-gate if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 7207c478bd9Sstevel@tonic-gate limit = MAXOFFSET_T; 7217c478bd9Sstevel@tonic-gate 7227c478bd9Sstevel@tonic-gate if (uio->uio_loffset >= limit) { 7237c478bd9Sstevel@tonic-gate proc_t *p = ttoproc(curthread); 7247c478bd9Sstevel@tonic-gate 7257c478bd9Sstevel@tonic-gate mutex_enter(&p->p_lock); 7267c478bd9Sstevel@tonic-gate (void) rctl_action(rctlproc_legacy[RLIMIT_FSIZE], p->p_rctls, 7277c478bd9Sstevel@tonic-gate p, RCA_UNSAFE_SIGINFO); 7287c478bd9Sstevel@tonic-gate mutex_exit(&p->p_lock); 7297c478bd9Sstevel@tonic-gate return (EFBIG); 7307c478bd9Sstevel@tonic-gate } 7317c478bd9Sstevel@tonic-gate 7327c478bd9Sstevel@tonic-gate /* 7337c478bd9Sstevel@tonic-gate * if largefiles are disallowed, the limit is 7347c478bd9Sstevel@tonic-gate * the pre-largefiles value of 2GB 7357c478bd9Sstevel@tonic-gate */ 7367c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_lfflags & UFS_LARGEFILES) 7377c478bd9Sstevel@tonic-gate limit = MIN(UFS_MAXOFFSET_T, limit); 7387c478bd9Sstevel@tonic-gate else 7397c478bd9Sstevel@tonic-gate limit = MIN(MAXOFF32_T, limit); 7407c478bd9Sstevel@tonic-gate 7417c478bd9Sstevel@tonic-gate if (uio->uio_loffset < (offset_t)0) { 7427c478bd9Sstevel@tonic-gate return (EINVAL); 7437c478bd9Sstevel@tonic-gate } 7447c478bd9Sstevel@tonic-gate if (uio->uio_resid == 0) { 7457c478bd9Sstevel@tonic-gate return (0); 7467c478bd9Sstevel@tonic-gate } 7477c478bd9Sstevel@tonic-gate 7487c478bd9Sstevel@tonic-gate if (uio->uio_loffset >= limit) 7497c478bd9Sstevel@tonic-gate return (EFBIG); 7507c478bd9Sstevel@tonic-gate 7517c478bd9Sstevel@tonic-gate ip->i_flag |= INOACC; /* don't update ref time in getpage */ 7527c478bd9Sstevel@tonic-gate 7537c478bd9Sstevel@tonic-gate if (ioflag & (FSYNC|FDSYNC)) { 7547c478bd9Sstevel@tonic-gate ip->i_flag |= ISYNC; 7557c478bd9Sstevel@tonic-gate iupdat_flag = 1; 7567c478bd9Sstevel@tonic-gate } 7577c478bd9Sstevel@tonic-gate /* 7587c478bd9Sstevel@tonic-gate * Try to go direct 7597c478bd9Sstevel@tonic-gate */ 7607c478bd9Sstevel@tonic-gate if (ip->i_flag & IDIRECTIO || ufsvfsp->vfs_forcedirectio) { 7617c478bd9Sstevel@tonic-gate uio->uio_llimit = limit; 7627c478bd9Sstevel@tonic-gate error = ufs_directio_write(ip, uio, ioflag, 0, cr, 76380d34432Sfrankho &directio_status); 7647c478bd9Sstevel@tonic-gate /* 7657c478bd9Sstevel@tonic-gate * If ufs_directio wrote to the file or set the flags, 7667c478bd9Sstevel@tonic-gate * we need to update i_seq, but it may be deferred. 7677c478bd9Sstevel@tonic-gate */ 7687c478bd9Sstevel@tonic-gate if (start_resid != uio->uio_resid || 76980d34432Sfrankho (ip->i_flag & (ICHG|IUPD))) { 7707c478bd9Sstevel@tonic-gate i_seq_needed = 1; 7717c478bd9Sstevel@tonic-gate ip->i_flag |= ISEQ; 7727c478bd9Sstevel@tonic-gate } 7737c478bd9Sstevel@tonic-gate if (directio_status == DIRECTIO_SUCCESS) 7747c478bd9Sstevel@tonic-gate goto out; 7757c478bd9Sstevel@tonic-gate } 7767c478bd9Sstevel@tonic-gate 7777c478bd9Sstevel@tonic-gate /* 7787c478bd9Sstevel@tonic-gate * Behavior with respect to dropping/reacquiring vfs_dqrwlock: 7797c478bd9Sstevel@tonic-gate * 7807c478bd9Sstevel@tonic-gate * o shadow inodes: vfs_dqrwlock is not held at all 7817c478bd9Sstevel@tonic-gate * o quota updates: vfs_dqrwlock is read or write held 7827c478bd9Sstevel@tonic-gate * o other updates: vfs_dqrwlock is read held 7837c478bd9Sstevel@tonic-gate * 7847c478bd9Sstevel@tonic-gate * The first case is the only one where we do not hold 7857c478bd9Sstevel@tonic-gate * vfs_dqrwlock at all while entering wrip(). 7867c478bd9Sstevel@tonic-gate * We must make sure not to downgrade/drop vfs_dqrwlock if we 7877c478bd9Sstevel@tonic-gate * have it as writer, i.e. if we are updating the quota inode. 7887c478bd9Sstevel@tonic-gate * There is no potential deadlock scenario in this case as 7897c478bd9Sstevel@tonic-gate * ufs_getpage() takes care of this and avoids reacquiring 7907c478bd9Sstevel@tonic-gate * vfs_dqrwlock in that case. 7917c478bd9Sstevel@tonic-gate * 7927c478bd9Sstevel@tonic-gate * This check is done here since the above conditions do not change 7937c478bd9Sstevel@tonic-gate * and we possibly loop below, so save a few cycles. 7947c478bd9Sstevel@tonic-gate */ 7957c478bd9Sstevel@tonic-gate if ((type == IFSHAD) || 79680d34432Sfrankho (rw_owner(&ufsvfsp->vfs_dqrwlock) == curthread)) { 797986fd29aSsetje do_dqrwlock = 0; 7987c478bd9Sstevel@tonic-gate } else { 7997c478bd9Sstevel@tonic-gate do_dqrwlock = 1; 8007c478bd9Sstevel@tonic-gate } 8017c478bd9Sstevel@tonic-gate 8027c478bd9Sstevel@tonic-gate /* 8037c478bd9Sstevel@tonic-gate * Large Files: We cast MAXBMASK to offset_t 8047c478bd9Sstevel@tonic-gate * inorder to mask out the higher bits. Since offset_t 8057c478bd9Sstevel@tonic-gate * is a signed value, the high order bit set in MAXBMASK 8067c478bd9Sstevel@tonic-gate * value makes it do the right thing by having all bits 1 8077c478bd9Sstevel@tonic-gate * in the higher word. May be removed for _SOLARIS64_. 8087c478bd9Sstevel@tonic-gate */ 8097c478bd9Sstevel@tonic-gate 8107c478bd9Sstevel@tonic-gate fs = ip->i_fs; 8117c478bd9Sstevel@tonic-gate do { 8127c478bd9Sstevel@tonic-gate u_offset_t uoff = uio->uio_loffset; 8137c478bd9Sstevel@tonic-gate off = uoff & (offset_t)MAXBMASK; 8147c478bd9Sstevel@tonic-gate mapon = (int)(uoff & (offset_t)MAXBOFFSET); 8157c478bd9Sstevel@tonic-gate on = (int)blkoff(fs, uoff); 8167c478bd9Sstevel@tonic-gate n = (int)MIN(fs->fs_bsize - on, uio->uio_resid); 8177c478bd9Sstevel@tonic-gate new_iblocks = 1; 8187c478bd9Sstevel@tonic-gate 8197c478bd9Sstevel@tonic-gate if (type == IFREG && uoff + n >= limit) { 8207c478bd9Sstevel@tonic-gate if (uoff >= limit) { 8217c478bd9Sstevel@tonic-gate error = EFBIG; 8227c478bd9Sstevel@tonic-gate goto out; 8237c478bd9Sstevel@tonic-gate } 8247c478bd9Sstevel@tonic-gate /* 8257c478bd9Sstevel@tonic-gate * since uoff + n >= limit, 8267c478bd9Sstevel@tonic-gate * therefore n >= limit - uoff, and n is an int 8277c478bd9Sstevel@tonic-gate * so it is safe to cast it to an int 8287c478bd9Sstevel@tonic-gate */ 8297c478bd9Sstevel@tonic-gate n = (int)(limit - (rlim64_t)uoff); 8307c478bd9Sstevel@tonic-gate } 8317c478bd9Sstevel@tonic-gate if (uoff + n > ip->i_size) { 8327c478bd9Sstevel@tonic-gate /* 8337c478bd9Sstevel@tonic-gate * We are extending the length of the file. 8347c478bd9Sstevel@tonic-gate * bmap is used so that we are sure that 8357c478bd9Sstevel@tonic-gate * if we need to allocate new blocks, that it 8367c478bd9Sstevel@tonic-gate * is done here before we up the file size. 8377c478bd9Sstevel@tonic-gate */ 8387c478bd9Sstevel@tonic-gate error = bmap_write(ip, uoff, (int)(on + n), 839303bf60bSsdebnath mapon == 0, NULL, cr); 8407c478bd9Sstevel@tonic-gate /* 8417c478bd9Sstevel@tonic-gate * bmap_write never drops i_contents so if 8427c478bd9Sstevel@tonic-gate * the flags are set it changed the file. 8437c478bd9Sstevel@tonic-gate */ 8447c478bd9Sstevel@tonic-gate if (ip->i_flag & (ICHG|IUPD)) { 8457c478bd9Sstevel@tonic-gate i_seq_needed = 1; 8467c478bd9Sstevel@tonic-gate ip->i_flag |= ISEQ; 8477c478bd9Sstevel@tonic-gate } 8487c478bd9Sstevel@tonic-gate if (error) 8497c478bd9Sstevel@tonic-gate break; 8507c478bd9Sstevel@tonic-gate /* 8517c478bd9Sstevel@tonic-gate * There is a window of vulnerability here. 8527c478bd9Sstevel@tonic-gate * The sequence of operations: allocate file 8537c478bd9Sstevel@tonic-gate * system blocks, uiomove the data into pages, 8547c478bd9Sstevel@tonic-gate * and then update the size of the file in the 8557c478bd9Sstevel@tonic-gate * inode, must happen atomically. However, due 8567c478bd9Sstevel@tonic-gate * to current locking constraints, this can not 8577c478bd9Sstevel@tonic-gate * be done. 8587c478bd9Sstevel@tonic-gate */ 8597c478bd9Sstevel@tonic-gate ASSERT(ip->i_writer == NULL); 8607c478bd9Sstevel@tonic-gate ip->i_writer = curthread; 8617c478bd9Sstevel@tonic-gate i_size_changed = 1; 8627c478bd9Sstevel@tonic-gate /* 8637c478bd9Sstevel@tonic-gate * If we are writing from the beginning of 8647c478bd9Sstevel@tonic-gate * the mapping, we can just create the 8657c478bd9Sstevel@tonic-gate * pages without having to read them. 8667c478bd9Sstevel@tonic-gate */ 8677c478bd9Sstevel@tonic-gate pagecreate = (mapon == 0); 8687c478bd9Sstevel@tonic-gate } else if (n == MAXBSIZE) { 8697c478bd9Sstevel@tonic-gate /* 8707c478bd9Sstevel@tonic-gate * Going to do a whole mappings worth, 8717c478bd9Sstevel@tonic-gate * so we can just create the pages w/o 8727c478bd9Sstevel@tonic-gate * having to read them in. But before 8737c478bd9Sstevel@tonic-gate * we do that, we need to make sure any 8747c478bd9Sstevel@tonic-gate * needed blocks are allocated first. 8757c478bd9Sstevel@tonic-gate */ 8767c478bd9Sstevel@tonic-gate iblocks = ip->i_blocks; 877303bf60bSsdebnath error = bmap_write(ip, uoff, (int)(on + n), 878303bf60bSsdebnath BI_ALLOC_ONLY, NULL, cr); 8797c478bd9Sstevel@tonic-gate /* 8807c478bd9Sstevel@tonic-gate * bmap_write never drops i_contents so if 8817c478bd9Sstevel@tonic-gate * the flags are set it changed the file. 8827c478bd9Sstevel@tonic-gate */ 8837c478bd9Sstevel@tonic-gate if (ip->i_flag & (ICHG|IUPD)) { 8847c478bd9Sstevel@tonic-gate i_seq_needed = 1; 8857c478bd9Sstevel@tonic-gate ip->i_flag |= ISEQ; 8867c478bd9Sstevel@tonic-gate } 8877c478bd9Sstevel@tonic-gate if (error) 8887c478bd9Sstevel@tonic-gate break; 8897c478bd9Sstevel@tonic-gate pagecreate = 1; 8907c478bd9Sstevel@tonic-gate /* 8917c478bd9Sstevel@tonic-gate * check if the new created page needed the 8927c478bd9Sstevel@tonic-gate * allocation of new disk blocks. 8937c478bd9Sstevel@tonic-gate */ 8947c478bd9Sstevel@tonic-gate if (iblocks == ip->i_blocks) 8957c478bd9Sstevel@tonic-gate new_iblocks = 0; /* no new blocks allocated */ 8967c478bd9Sstevel@tonic-gate } else { 8977c478bd9Sstevel@tonic-gate pagecreate = 0; 8987c478bd9Sstevel@tonic-gate /* 8997c478bd9Sstevel@tonic-gate * In sync mode flush the indirect blocks which 9007c478bd9Sstevel@tonic-gate * may have been allocated and not written on 9017c478bd9Sstevel@tonic-gate * disk. In above cases bmap_write will allocate 9027c478bd9Sstevel@tonic-gate * in sync mode. 9037c478bd9Sstevel@tonic-gate */ 9047c478bd9Sstevel@tonic-gate if (ioflag & (FSYNC|FDSYNC)) { 9057c478bd9Sstevel@tonic-gate error = ufs_indirblk_sync(ip, uoff); 9067c478bd9Sstevel@tonic-gate if (error) 9077c478bd9Sstevel@tonic-gate break; 9087c478bd9Sstevel@tonic-gate } 9097c478bd9Sstevel@tonic-gate } 9107c478bd9Sstevel@tonic-gate 9117c478bd9Sstevel@tonic-gate /* 9127c478bd9Sstevel@tonic-gate * At this point we can enter ufs_getpage() in one 9137c478bd9Sstevel@tonic-gate * of two ways: 9147c478bd9Sstevel@tonic-gate * 1) segmap_getmapflt() calls ufs_getpage() when the 9157c478bd9Sstevel@tonic-gate * forcefault parameter is true (pagecreate == 0) 9167c478bd9Sstevel@tonic-gate * 2) uiomove() causes a page fault. 9177c478bd9Sstevel@tonic-gate * 9187c478bd9Sstevel@tonic-gate * We have to drop the contents lock to prevent the VM 919da6c28aaSamw * system from trying to reacquire it in ufs_getpage() 9207c478bd9Sstevel@tonic-gate * should the uiomove cause a pagefault. 9217c478bd9Sstevel@tonic-gate * 9227c478bd9Sstevel@tonic-gate * We have to drop the reader vfs_dqrwlock here as well. 9237c478bd9Sstevel@tonic-gate */ 9247c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 9257c478bd9Sstevel@tonic-gate if (do_dqrwlock) { 9267c478bd9Sstevel@tonic-gate ASSERT(RW_LOCK_HELD(&ufsvfsp->vfs_dqrwlock)); 9277c478bd9Sstevel@tonic-gate ASSERT(!(RW_WRITE_HELD(&ufsvfsp->vfs_dqrwlock))); 9287c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 9297c478bd9Sstevel@tonic-gate } 9307c478bd9Sstevel@tonic-gate 931a5652762Spraks newpage = 0; 932a5652762Spraks premove_resid = uio->uio_resid; 9336f5f1c63SDonghai Qiao 9346f5f1c63SDonghai Qiao /* 9356f5f1c63SDonghai Qiao * Touch the page and fault it in if it is not in core 9366f5f1c63SDonghai Qiao * before segmap_getmapflt or vpm_data_copy can lock it. 9376f5f1c63SDonghai Qiao * This is to avoid the deadlock if the buffer is mapped 9386f5f1c63SDonghai Qiao * to the same file through mmap which we want to write. 9396f5f1c63SDonghai Qiao */ 9406f5f1c63SDonghai Qiao uio_prefaultpages((long)n, uio); 9416f5f1c63SDonghai Qiao 942a5652762Spraks if (vpm_enable) { 943a5652762Spraks /* 944a5652762Spraks * Copy data. If new pages are created, part of 945a5652762Spraks * the page that is not written will be initizliazed 946a5652762Spraks * with zeros. 947a5652762Spraks */ 948a5652762Spraks error = vpm_data_copy(vp, (off + mapon), (uint_t)n, 94980d34432Sfrankho uio, !pagecreate, &newpage, 0, S_WRITE); 950a5652762Spraks } else { 951a5652762Spraks 952a5652762Spraks base = segmap_getmapflt(segkmap, vp, (off + mapon), 95380d34432Sfrankho (uint_t)n, !pagecreate, S_WRITE); 9547c478bd9Sstevel@tonic-gate 955a5652762Spraks /* 956a5652762Spraks * segmap_pagecreate() returns 1 if it calls 957a5652762Spraks * page_create_va() to allocate any pages. 958a5652762Spraks */ 9597c478bd9Sstevel@tonic-gate 960a5652762Spraks if (pagecreate) 961a5652762Spraks newpage = segmap_pagecreate(segkmap, base, 962a5652762Spraks (size_t)n, 0); 9637c478bd9Sstevel@tonic-gate 964a5652762Spraks error = uiomove(base + mapon, (long)n, UIO_WRITE, uio); 965a5652762Spraks } 9667c478bd9Sstevel@tonic-gate 9677c478bd9Sstevel@tonic-gate /* 9687c478bd9Sstevel@tonic-gate * If "newpage" is set, then a new page was created and it 9697c478bd9Sstevel@tonic-gate * does not contain valid data, so it needs to be initialized 9707c478bd9Sstevel@tonic-gate * at this point. 9717c478bd9Sstevel@tonic-gate * Otherwise the page contains old data, which was overwritten 9727c478bd9Sstevel@tonic-gate * partially or as a whole in uiomove. 9737c478bd9Sstevel@tonic-gate * If there is only one iovec structure within uio, then 9747c478bd9Sstevel@tonic-gate * on error uiomove will not be able to update uio->uio_loffset 9757c478bd9Sstevel@tonic-gate * and we would zero the whole page here! 9767c478bd9Sstevel@tonic-gate * 9777c478bd9Sstevel@tonic-gate * If uiomove fails because of an error, the old valid data 9787c478bd9Sstevel@tonic-gate * is kept instead of filling the rest of the page with zero's. 9797c478bd9Sstevel@tonic-gate */ 980a5652762Spraks if (!vpm_enable && newpage && 9817c478bd9Sstevel@tonic-gate uio->uio_loffset < roundup(off + mapon + n, PAGESIZE)) { 9827c478bd9Sstevel@tonic-gate /* 9837c478bd9Sstevel@tonic-gate * We created pages w/o initializing them completely, 9847c478bd9Sstevel@tonic-gate * thus we need to zero the part that wasn't set up. 9857c478bd9Sstevel@tonic-gate * This happens on most EOF write cases and if 9867c478bd9Sstevel@tonic-gate * we had some sort of error during the uiomove. 9877c478bd9Sstevel@tonic-gate */ 9887c478bd9Sstevel@tonic-gate int nzero, nmoved; 9897c478bd9Sstevel@tonic-gate 9907c478bd9Sstevel@tonic-gate nmoved = (int)(uio->uio_loffset - (off + mapon)); 9917c478bd9Sstevel@tonic-gate ASSERT(nmoved >= 0 && nmoved <= n); 9927c478bd9Sstevel@tonic-gate nzero = roundup(on + n, PAGESIZE) - nmoved; 9937c478bd9Sstevel@tonic-gate ASSERT(nzero > 0 && mapon + nmoved + nzero <= MAXBSIZE); 9947c478bd9Sstevel@tonic-gate (void) kzero(base + mapon + nmoved, (uint_t)nzero); 9957c478bd9Sstevel@tonic-gate } 9967c478bd9Sstevel@tonic-gate 9977c478bd9Sstevel@tonic-gate /* 9987c478bd9Sstevel@tonic-gate * Unlock the pages allocated by page_create_va() 9997c478bd9Sstevel@tonic-gate * in segmap_pagecreate() 10007c478bd9Sstevel@tonic-gate */ 1001a5652762Spraks if (!vpm_enable && newpage) 10027c478bd9Sstevel@tonic-gate segmap_pageunlock(segkmap, base, (size_t)n, S_WRITE); 10037c478bd9Sstevel@tonic-gate 10047c478bd9Sstevel@tonic-gate /* 10057c478bd9Sstevel@tonic-gate * If the size of the file changed, then update the 10067c478bd9Sstevel@tonic-gate * size field in the inode now. This can't be done 10077c478bd9Sstevel@tonic-gate * before the call to segmap_pageunlock or there is 10087c478bd9Sstevel@tonic-gate * a potential deadlock with callers to ufs_putpage(). 10097c478bd9Sstevel@tonic-gate * They will be holding i_contents and trying to lock 10107c478bd9Sstevel@tonic-gate * a page, while this thread is holding a page locked 10117c478bd9Sstevel@tonic-gate * and trying to acquire i_contents. 10127c478bd9Sstevel@tonic-gate */ 10137c478bd9Sstevel@tonic-gate if (i_size_changed) { 10147c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 10157c478bd9Sstevel@tonic-gate old_i_size = ip->i_size; 10167c478bd9Sstevel@tonic-gate UFS_SET_ISIZE(uoff + n, ip); 10177c478bd9Sstevel@tonic-gate TRANS_INODE(ufsvfsp, ip); 10187c478bd9Sstevel@tonic-gate /* 10197c478bd9Sstevel@tonic-gate * file has grown larger than 2GB. Set flag 10207c478bd9Sstevel@tonic-gate * in superblock to indicate this, if it 10217c478bd9Sstevel@tonic-gate * is not already set. 10227c478bd9Sstevel@tonic-gate */ 10237c478bd9Sstevel@tonic-gate if ((ip->i_size > MAXOFF32_T) && 10247c478bd9Sstevel@tonic-gate !(fs->fs_flags & FSLARGEFILES)) { 10257c478bd9Sstevel@tonic-gate ASSERT(ufsvfsp->vfs_lfflags & UFS_LARGEFILES); 10267c478bd9Sstevel@tonic-gate mutex_enter(&ufsvfsp->vfs_lock); 10277c478bd9Sstevel@tonic-gate fs->fs_flags |= FSLARGEFILES; 10287c478bd9Sstevel@tonic-gate ufs_sbwrite(ufsvfsp); 10297c478bd9Sstevel@tonic-gate mutex_exit(&ufsvfsp->vfs_lock); 10307c478bd9Sstevel@tonic-gate } 10317c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 10327c478bd9Sstevel@tonic-gate ip->i_writer = NULL; 10337c478bd9Sstevel@tonic-gate cv_broadcast(&ip->i_wrcv); 10347c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 10357c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 10367c478bd9Sstevel@tonic-gate } 10377c478bd9Sstevel@tonic-gate 10387c478bd9Sstevel@tonic-gate if (error) { 10397c478bd9Sstevel@tonic-gate /* 10407c478bd9Sstevel@tonic-gate * If we failed on a write, we may have already 10417c478bd9Sstevel@tonic-gate * allocated file blocks as well as pages. It's 10427c478bd9Sstevel@tonic-gate * hard to undo the block allocation, but we must 10437c478bd9Sstevel@tonic-gate * be sure to invalidate any pages that may have 10447c478bd9Sstevel@tonic-gate * been allocated. 10457c478bd9Sstevel@tonic-gate * 10467c478bd9Sstevel@tonic-gate * If the page was created without initialization 10477c478bd9Sstevel@tonic-gate * then we must check if it should be possible 10487c478bd9Sstevel@tonic-gate * to destroy the new page and to keep the old data 10497c478bd9Sstevel@tonic-gate * on the disk. 10507c478bd9Sstevel@tonic-gate * 10517c478bd9Sstevel@tonic-gate * It is possible to destroy the page without 10527c478bd9Sstevel@tonic-gate * having to write back its contents only when 10537c478bd9Sstevel@tonic-gate * - the size of the file keeps unchanged 10547c478bd9Sstevel@tonic-gate * - bmap_write() did not allocate new disk blocks 10557c478bd9Sstevel@tonic-gate * it is possible to create big files using "seek" and 10567c478bd9Sstevel@tonic-gate * write to the end of the file. A "write" to a 10577c478bd9Sstevel@tonic-gate * position before the end of the file would not 10587c478bd9Sstevel@tonic-gate * change the size of the file but it would allocate 10597c478bd9Sstevel@tonic-gate * new disk blocks. 10607c478bd9Sstevel@tonic-gate * - uiomove intended to overwrite the whole page. 10617c478bd9Sstevel@tonic-gate * - a new page was created (newpage == 1). 10627c478bd9Sstevel@tonic-gate */ 10637c478bd9Sstevel@tonic-gate 10647c478bd9Sstevel@tonic-gate if (i_size_changed == 0 && new_iblocks == 0 && 10657c478bd9Sstevel@tonic-gate newpage) { 10667c478bd9Sstevel@tonic-gate 10677c478bd9Sstevel@tonic-gate /* unwind what uiomove eventually last did */ 10687c478bd9Sstevel@tonic-gate uio->uio_resid = premove_resid; 10697c478bd9Sstevel@tonic-gate 10707c478bd9Sstevel@tonic-gate /* 10717c478bd9Sstevel@tonic-gate * destroy the page, do not write ambiguous 10727c478bd9Sstevel@tonic-gate * data to the disk. 10737c478bd9Sstevel@tonic-gate */ 10747c478bd9Sstevel@tonic-gate flags = SM_DESTROY; 10757c478bd9Sstevel@tonic-gate } else { 10767c478bd9Sstevel@tonic-gate /* 10777c478bd9Sstevel@tonic-gate * write the page back to the disk, if dirty, 10787c478bd9Sstevel@tonic-gate * and remove the page from the cache. 10797c478bd9Sstevel@tonic-gate */ 10807c478bd9Sstevel@tonic-gate flags = SM_INVAL; 10817c478bd9Sstevel@tonic-gate } 1082a5652762Spraks 1083a5652762Spraks if (vpm_enable) { 1084a5652762Spraks /* 1085a5652762Spraks * Flush pages. 1086a5652762Spraks */ 1087a5652762Spraks (void) vpm_sync_pages(vp, off, n, flags); 1088a5652762Spraks } else { 1089a5652762Spraks (void) segmap_release(segkmap, base, flags); 1090a5652762Spraks } 10917c478bd9Sstevel@tonic-gate } else { 10927c478bd9Sstevel@tonic-gate flags = 0; 10937c478bd9Sstevel@tonic-gate /* 10947c478bd9Sstevel@tonic-gate * Force write back for synchronous write cases. 10957c478bd9Sstevel@tonic-gate */ 10967c478bd9Sstevel@tonic-gate if ((ioflag & (FSYNC|FDSYNC)) || type == IFDIR) { 10977c478bd9Sstevel@tonic-gate /* 10987c478bd9Sstevel@tonic-gate * If the sticky bit is set but the 10997c478bd9Sstevel@tonic-gate * execute bit is not set, we do a 11007c478bd9Sstevel@tonic-gate * synchronous write back and free 11017c478bd9Sstevel@tonic-gate * the page when done. We set up swap 11027c478bd9Sstevel@tonic-gate * files to be handled this way to 11037c478bd9Sstevel@tonic-gate * prevent servers from keeping around 11047c478bd9Sstevel@tonic-gate * the client's swap pages too long. 11057c478bd9Sstevel@tonic-gate * XXX - there ought to be a better way. 11067c478bd9Sstevel@tonic-gate */ 11077c478bd9Sstevel@tonic-gate if (IS_SWAPVP(vp)) { 11087c478bd9Sstevel@tonic-gate flags = SM_WRITE | SM_FREE | 11097c478bd9Sstevel@tonic-gate SM_DONTNEED; 11107c478bd9Sstevel@tonic-gate iupdat_flag = 0; 11117c478bd9Sstevel@tonic-gate } else { 11127c478bd9Sstevel@tonic-gate flags = SM_WRITE; 11137c478bd9Sstevel@tonic-gate } 11147c478bd9Sstevel@tonic-gate } else if (n + on == MAXBSIZE || IS_SWAPVP(vp)) { 11157c478bd9Sstevel@tonic-gate /* 11167c478bd9Sstevel@tonic-gate * Have written a whole block. 11177c478bd9Sstevel@tonic-gate * Start an asynchronous write and 11187c478bd9Sstevel@tonic-gate * mark the buffer to indicate that 11197c478bd9Sstevel@tonic-gate * it won't be needed again soon. 11207c478bd9Sstevel@tonic-gate */ 11217c478bd9Sstevel@tonic-gate flags = SM_WRITE | SM_ASYNC | SM_DONTNEED; 11227c478bd9Sstevel@tonic-gate } 1123a5652762Spraks if (vpm_enable) { 1124a5652762Spraks /* 1125a5652762Spraks * Flush pages. 1126a5652762Spraks */ 11273bd1497bSpraks error = vpm_sync_pages(vp, off, n, flags); 1128a5652762Spraks } else { 11293bd1497bSpraks error = segmap_release(segkmap, base, flags); 1130a5652762Spraks } 11317c478bd9Sstevel@tonic-gate /* 11327c478bd9Sstevel@tonic-gate * If the operation failed and is synchronous, 11337c478bd9Sstevel@tonic-gate * then we need to unwind what uiomove() last 11347c478bd9Sstevel@tonic-gate * did so we can potentially return an error to 11357c478bd9Sstevel@tonic-gate * the caller. If this write operation was 11367c478bd9Sstevel@tonic-gate * done in two pieces and the first succeeded, 11377c478bd9Sstevel@tonic-gate * then we won't return an error for the second 11387c478bd9Sstevel@tonic-gate * piece that failed. However, we only want to 11397c478bd9Sstevel@tonic-gate * return a resid value that reflects what was 11407c478bd9Sstevel@tonic-gate * really done. 11417c478bd9Sstevel@tonic-gate * 11427c478bd9Sstevel@tonic-gate * Failures for non-synchronous operations can 11437c478bd9Sstevel@tonic-gate * be ignored since the page subsystem will 11447c478bd9Sstevel@tonic-gate * retry the operation until it succeeds or the 11457c478bd9Sstevel@tonic-gate * file system is unmounted. 11467c478bd9Sstevel@tonic-gate */ 11477c478bd9Sstevel@tonic-gate if (error) { 11487c478bd9Sstevel@tonic-gate if ((ioflag & (FSYNC | FDSYNC)) || 11497c478bd9Sstevel@tonic-gate type == IFDIR) { 11507c478bd9Sstevel@tonic-gate uio->uio_resid = premove_resid; 11517c478bd9Sstevel@tonic-gate } else { 11527c478bd9Sstevel@tonic-gate error = 0; 11537c478bd9Sstevel@tonic-gate } 11547c478bd9Sstevel@tonic-gate } 11557c478bd9Sstevel@tonic-gate } 11567c478bd9Sstevel@tonic-gate 11577c478bd9Sstevel@tonic-gate /* 11587c478bd9Sstevel@tonic-gate * Re-acquire contents lock. 11597c478bd9Sstevel@tonic-gate * If it was dropped, reacquire reader vfs_dqrwlock as well. 11607c478bd9Sstevel@tonic-gate */ 11617c478bd9Sstevel@tonic-gate if (do_dqrwlock) 11627c478bd9Sstevel@tonic-gate rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 11637c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 11647c478bd9Sstevel@tonic-gate 11657c478bd9Sstevel@tonic-gate /* 11667c478bd9Sstevel@tonic-gate * If the uiomove() failed or if a synchronous 11677c478bd9Sstevel@tonic-gate * page push failed, fix up i_size. 11687c478bd9Sstevel@tonic-gate */ 11697c478bd9Sstevel@tonic-gate if (error) { 11707c478bd9Sstevel@tonic-gate if (i_size_changed) { 11717c478bd9Sstevel@tonic-gate /* 11727c478bd9Sstevel@tonic-gate * The uiomove failed, and we 11737c478bd9Sstevel@tonic-gate * allocated blocks,so get rid 11747c478bd9Sstevel@tonic-gate * of them. 11757c478bd9Sstevel@tonic-gate */ 11767c478bd9Sstevel@tonic-gate (void) ufs_itrunc(ip, old_i_size, 0, cr); 11777c478bd9Sstevel@tonic-gate } 11787c478bd9Sstevel@tonic-gate } else { 11797c478bd9Sstevel@tonic-gate /* 11807c478bd9Sstevel@tonic-gate * XXX - Can this be out of the loop? 11817c478bd9Sstevel@tonic-gate */ 11827c478bd9Sstevel@tonic-gate ip->i_flag |= IUPD | ICHG; 11837c478bd9Sstevel@tonic-gate /* 11847c478bd9Sstevel@tonic-gate * Only do one increase of i_seq for multiple 11857c478bd9Sstevel@tonic-gate * pieces. Because we drop locks, record 11867c478bd9Sstevel@tonic-gate * the fact that we changed the timestamp and 11877c478bd9Sstevel@tonic-gate * are deferring the increase in case another thread 11887c478bd9Sstevel@tonic-gate * pushes our timestamp update. 11897c478bd9Sstevel@tonic-gate */ 11907c478bd9Sstevel@tonic-gate i_seq_needed = 1; 11917c478bd9Sstevel@tonic-gate ip->i_flag |= ISEQ; 11927c478bd9Sstevel@tonic-gate if (i_size_changed) 11937c478bd9Sstevel@tonic-gate ip->i_flag |= IATTCHG; 11947c478bd9Sstevel@tonic-gate if ((ip->i_mode & (IEXEC | (IEXEC >> 3) | 11957c478bd9Sstevel@tonic-gate (IEXEC >> 6))) != 0 && 11967c478bd9Sstevel@tonic-gate (ip->i_mode & (ISUID | ISGID)) != 0 && 11977c478bd9Sstevel@tonic-gate secpolicy_vnode_setid_retain(cr, 11987c478bd9Sstevel@tonic-gate (ip->i_mode & ISUID) != 0 && ip->i_uid == 0) != 0) { 11997c478bd9Sstevel@tonic-gate /* 12007c478bd9Sstevel@tonic-gate * Clear Set-UID & Set-GID bits on 12017c478bd9Sstevel@tonic-gate * successful write if not privileged 12027c478bd9Sstevel@tonic-gate * and at least one of the execute bits 12037c478bd9Sstevel@tonic-gate * is set. If we always clear Set-GID, 12047c478bd9Sstevel@tonic-gate * mandatory file and record locking is 12057c478bd9Sstevel@tonic-gate * unuseable. 12067c478bd9Sstevel@tonic-gate */ 12077c478bd9Sstevel@tonic-gate ip->i_mode &= ~(ISUID | ISGID); 12087c478bd9Sstevel@tonic-gate } 12097c478bd9Sstevel@tonic-gate } 1210f90bab20Sswilcox /* 1211f90bab20Sswilcox * In the case the FDSYNC flag is set and this is a 1212f90bab20Sswilcox * "rewrite" we won't log a delta. 1213f90bab20Sswilcox * The FSYNC flag overrides all cases. 1214f90bab20Sswilcox */ 1215f90bab20Sswilcox if (!ufs_check_rewrite(ip, uio, ioflag) || !(ioflag & FDSYNC)) { 1216f90bab20Sswilcox TRANS_INODE(ufsvfsp, ip); 1217f90bab20Sswilcox } 12187c478bd9Sstevel@tonic-gate } while (error == 0 && uio->uio_resid > 0 && n != 0); 12197c478bd9Sstevel@tonic-gate 12207c478bd9Sstevel@tonic-gate out: 12217c478bd9Sstevel@tonic-gate /* 12227c478bd9Sstevel@tonic-gate * Make sure i_seq is increased at least once per write 12237c478bd9Sstevel@tonic-gate */ 12247c478bd9Sstevel@tonic-gate if (i_seq_needed) { 12257c478bd9Sstevel@tonic-gate ip->i_seq++; 12267c478bd9Sstevel@tonic-gate ip->i_flag &= ~ISEQ; /* no longer deferred */ 12277c478bd9Sstevel@tonic-gate } 12287c478bd9Sstevel@tonic-gate 12297c478bd9Sstevel@tonic-gate /* 12307c478bd9Sstevel@tonic-gate * Inode is updated according to this table - 12317c478bd9Sstevel@tonic-gate * 12327c478bd9Sstevel@tonic-gate * FSYNC FDSYNC(posix.4) 12337c478bd9Sstevel@tonic-gate * -------------------------- 12347c478bd9Sstevel@tonic-gate * always@ IATTCHG|IBDWRITE 12357c478bd9Sstevel@tonic-gate * 1236*2575b441SToomas Soome * @ - If we are doing synchronous write the only time we should 12377c478bd9Sstevel@tonic-gate * not be sync'ing the ip here is if we have the stickyhack 12387c478bd9Sstevel@tonic-gate * activated, the file is marked with the sticky bit and 12397c478bd9Sstevel@tonic-gate * no exec bit, the file length has not been changed and 12407c478bd9Sstevel@tonic-gate * no new blocks have been allocated during this write. 12417c478bd9Sstevel@tonic-gate */ 12427c478bd9Sstevel@tonic-gate 12437c478bd9Sstevel@tonic-gate if ((ip->i_flag & ISYNC) != 0) { 12447c478bd9Sstevel@tonic-gate /* 12457c478bd9Sstevel@tonic-gate * we have eliminated nosync 12467c478bd9Sstevel@tonic-gate */ 12477c478bd9Sstevel@tonic-gate if ((ip->i_flag & (IATTCHG|IBDWRITE)) || 124880d34432Sfrankho ((ioflag & FSYNC) && iupdat_flag)) { 12497c478bd9Sstevel@tonic-gate ufs_iupdat(ip, 1); 12507c478bd9Sstevel@tonic-gate } 12517c478bd9Sstevel@tonic-gate } 12527c478bd9Sstevel@tonic-gate 12537c478bd9Sstevel@tonic-gate /* 12547c478bd9Sstevel@tonic-gate * If we've already done a partial-write, terminate 12557c478bd9Sstevel@tonic-gate * the write but return no error unless the error is ENOSPC 12567c478bd9Sstevel@tonic-gate * because the caller can detect this and free resources and 12577c478bd9Sstevel@tonic-gate * try again. 12587c478bd9Sstevel@tonic-gate */ 12597c478bd9Sstevel@tonic-gate if ((start_resid != uio->uio_resid) && (error != ENOSPC)) 12607c478bd9Sstevel@tonic-gate error = 0; 12617c478bd9Sstevel@tonic-gate 12627c478bd9Sstevel@tonic-gate ip->i_flag &= ~(INOACC | ISYNC); 12637c478bd9Sstevel@tonic-gate ITIMES_NOLOCK(ip); 12647c478bd9Sstevel@tonic-gate return (error); 12657c478bd9Sstevel@tonic-gate } 12667c478bd9Sstevel@tonic-gate 12677c478bd9Sstevel@tonic-gate /* 12687c478bd9Sstevel@tonic-gate * rdip does the real work of read requests for ufs. 12697c478bd9Sstevel@tonic-gate */ 12707c478bd9Sstevel@tonic-gate int 12717c478bd9Sstevel@tonic-gate rdip(struct inode *ip, struct uio *uio, int ioflag, cred_t *cr) 12727c478bd9Sstevel@tonic-gate { 12737c478bd9Sstevel@tonic-gate u_offset_t off; 12747c478bd9Sstevel@tonic-gate caddr_t base; 12757c478bd9Sstevel@tonic-gate struct fs *fs; 12767c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 12777c478bd9Sstevel@tonic-gate struct vnode *vp; 12787c478bd9Sstevel@tonic-gate long oresid = uio->uio_resid; 12797c478bd9Sstevel@tonic-gate u_offset_t n, on, mapon; 12807c478bd9Sstevel@tonic-gate int error = 0; 12817c478bd9Sstevel@tonic-gate int doupdate = 1; 1282562eee46Srbourbon uint_t flags; 12839c65d7dbSBryan Cantrill int directio_status; 12847c478bd9Sstevel@tonic-gate krw_t rwtype; 12857c478bd9Sstevel@tonic-gate o_mode_t type; 12867c478bd9Sstevel@tonic-gate 12877c478bd9Sstevel@tonic-gate vp = ITOV(ip); 12887c478bd9Sstevel@tonic-gate 12897c478bd9Sstevel@tonic-gate ASSERT(RW_LOCK_HELD(&ip->i_contents)); 12907c478bd9Sstevel@tonic-gate 12917c478bd9Sstevel@tonic-gate ufsvfsp = ip->i_ufsvfs; 12927c478bd9Sstevel@tonic-gate 12937c478bd9Sstevel@tonic-gate if (ufsvfsp == NULL) 12947c478bd9Sstevel@tonic-gate return (EIO); 12957c478bd9Sstevel@tonic-gate 12967c478bd9Sstevel@tonic-gate fs = ufsvfsp->vfs_fs; 12977c478bd9Sstevel@tonic-gate 12987c478bd9Sstevel@tonic-gate /* check for valid filetype */ 12997c478bd9Sstevel@tonic-gate type = ip->i_mode & IFMT; 13007c478bd9Sstevel@tonic-gate if ((type != IFREG) && (type != IFDIR) && (type != IFATTRDIR) && 13017c478bd9Sstevel@tonic-gate (type != IFLNK) && (type != IFSHAD)) { 13027c478bd9Sstevel@tonic-gate return (EIO); 13037c478bd9Sstevel@tonic-gate } 13047c478bd9Sstevel@tonic-gate 13057c478bd9Sstevel@tonic-gate if (uio->uio_loffset > UFS_MAXOFFSET_T) { 13067c478bd9Sstevel@tonic-gate error = 0; 13077c478bd9Sstevel@tonic-gate goto out; 13087c478bd9Sstevel@tonic-gate } 13097c478bd9Sstevel@tonic-gate if (uio->uio_loffset < (offset_t)0) { 13107c478bd9Sstevel@tonic-gate return (EINVAL); 13117c478bd9Sstevel@tonic-gate } 13127c478bd9Sstevel@tonic-gate if (uio->uio_resid == 0) { 13137c478bd9Sstevel@tonic-gate return (0); 13147c478bd9Sstevel@tonic-gate } 13157c478bd9Sstevel@tonic-gate 13167c478bd9Sstevel@tonic-gate if (!ULOCKFS_IS_NOIACC(ITOUL(ip)) && (fs->fs_ronly == 0) && 131780d34432Sfrankho (!ufsvfsp->vfs_noatime)) { 13187c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 13197c478bd9Sstevel@tonic-gate ip->i_flag |= IACC; 13207c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 13217c478bd9Sstevel@tonic-gate } 13227c478bd9Sstevel@tonic-gate /* 13237c478bd9Sstevel@tonic-gate * Try to go direct 13247c478bd9Sstevel@tonic-gate */ 13257c478bd9Sstevel@tonic-gate if (ip->i_flag & IDIRECTIO || ufsvfsp->vfs_forcedirectio) { 13267c478bd9Sstevel@tonic-gate error = ufs_directio_read(ip, uio, cr, &directio_status); 13277c478bd9Sstevel@tonic-gate if (directio_status == DIRECTIO_SUCCESS) 13287c478bd9Sstevel@tonic-gate goto out; 13297c478bd9Sstevel@tonic-gate } 13307c478bd9Sstevel@tonic-gate 13317c478bd9Sstevel@tonic-gate rwtype = (rw_write_held(&ip->i_contents)?RW_WRITER:RW_READER); 13327c478bd9Sstevel@tonic-gate 13337c478bd9Sstevel@tonic-gate do { 13347c478bd9Sstevel@tonic-gate offset_t diff; 13357c478bd9Sstevel@tonic-gate u_offset_t uoff = uio->uio_loffset; 13367c478bd9Sstevel@tonic-gate off = uoff & (offset_t)MAXBMASK; 13377c478bd9Sstevel@tonic-gate mapon = (u_offset_t)(uoff & (offset_t)MAXBOFFSET); 13387c478bd9Sstevel@tonic-gate on = (u_offset_t)blkoff(fs, uoff); 13397c478bd9Sstevel@tonic-gate n = MIN((u_offset_t)fs->fs_bsize - on, 134080d34432Sfrankho (u_offset_t)uio->uio_resid); 13417c478bd9Sstevel@tonic-gate 13427c478bd9Sstevel@tonic-gate diff = ip->i_size - uoff; 13437c478bd9Sstevel@tonic-gate 13447c478bd9Sstevel@tonic-gate if (diff <= (offset_t)0) { 13457c478bd9Sstevel@tonic-gate error = 0; 13467c478bd9Sstevel@tonic-gate goto out; 13477c478bd9Sstevel@tonic-gate } 13487c478bd9Sstevel@tonic-gate if (diff < (offset_t)n) 13497c478bd9Sstevel@tonic-gate n = (int)diff; 1350562eee46Srbourbon 13517c478bd9Sstevel@tonic-gate /* 13527c478bd9Sstevel@tonic-gate * At this point we can enter ufs_getpage() in one of two 13537c478bd9Sstevel@tonic-gate * ways: 13547c478bd9Sstevel@tonic-gate * 1) segmap_getmapflt() calls ufs_getpage() when the 13557c478bd9Sstevel@tonic-gate * forcefault parameter is true (value of 1 is passed) 13567c478bd9Sstevel@tonic-gate * 2) uiomove() causes a page fault. 13577c478bd9Sstevel@tonic-gate * 13587c478bd9Sstevel@tonic-gate * We cannot hold onto an i_contents reader lock without 13597c478bd9Sstevel@tonic-gate * risking deadlock in ufs_getpage() so drop a reader lock. 13607c478bd9Sstevel@tonic-gate * The ufs_getpage() dolock logic already allows for a 13617c478bd9Sstevel@tonic-gate * thread holding i_contents as writer to work properly 13627c478bd9Sstevel@tonic-gate * so we keep a writer lock. 13637c478bd9Sstevel@tonic-gate */ 13647c478bd9Sstevel@tonic-gate if (rwtype == RW_READER) 13657c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 13667c478bd9Sstevel@tonic-gate 1367a5652762Spraks if (vpm_enable) { 1368a5652762Spraks /* 1369a5652762Spraks * Copy data. 1370a5652762Spraks */ 1371a5652762Spraks error = vpm_data_copy(vp, (off + mapon), (uint_t)n, 137280d34432Sfrankho uio, 1, NULL, 0, S_READ); 1373a5652762Spraks } else { 1374a5652762Spraks base = segmap_getmapflt(segkmap, vp, (off + mapon), 137580d34432Sfrankho (uint_t)n, 1, S_READ); 1376a5652762Spraks error = uiomove(base + mapon, (long)n, UIO_READ, uio); 1377a5652762Spraks } 13787c478bd9Sstevel@tonic-gate 13797c478bd9Sstevel@tonic-gate flags = 0; 13807c478bd9Sstevel@tonic-gate if (!error) { 13817c478bd9Sstevel@tonic-gate /* 13827c478bd9Sstevel@tonic-gate * In POSIX SYNC (FSYNC and FDSYNC) read mode, 13837c478bd9Sstevel@tonic-gate * we want to make sure that the page which has 13847c478bd9Sstevel@tonic-gate * been read, is written on disk if it is dirty. 13857c478bd9Sstevel@tonic-gate * And corresponding indirect blocks should also 13867c478bd9Sstevel@tonic-gate * be flushed out. 13877c478bd9Sstevel@tonic-gate */ 13887c478bd9Sstevel@tonic-gate if ((ioflag & FRSYNC) && (ioflag & (FSYNC|FDSYNC))) { 13897c478bd9Sstevel@tonic-gate flags |= SM_WRITE; 13907c478bd9Sstevel@tonic-gate } 1391a5652762Spraks if (vpm_enable) { 1392a5652762Spraks error = vpm_sync_pages(vp, off, n, flags); 1393a5652762Spraks } else { 1394a5652762Spraks error = segmap_release(segkmap, base, flags); 1395a5652762Spraks } 1396a5652762Spraks } else { 1397a5652762Spraks if (vpm_enable) { 1398a5652762Spraks (void) vpm_sync_pages(vp, off, n, flags); 1399a5652762Spraks } else { 1400a5652762Spraks (void) segmap_release(segkmap, base, flags); 1401a5652762Spraks } 1402a5652762Spraks } 14037c478bd9Sstevel@tonic-gate 14047c478bd9Sstevel@tonic-gate if (rwtype == RW_READER) 14057c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, rwtype); 14067c478bd9Sstevel@tonic-gate } while (error == 0 && uio->uio_resid > 0 && n != 0); 14077c478bd9Sstevel@tonic-gate out: 14087c478bd9Sstevel@tonic-gate /* 14097c478bd9Sstevel@tonic-gate * Inode is updated according to this table if FRSYNC is set. 14107c478bd9Sstevel@tonic-gate * 14117c478bd9Sstevel@tonic-gate * FSYNC FDSYNC(posix.4) 14127c478bd9Sstevel@tonic-gate * -------------------------- 14137c478bd9Sstevel@tonic-gate * always IATTCHG|IBDWRITE 14147c478bd9Sstevel@tonic-gate */ 14157c478bd9Sstevel@tonic-gate /* 14167c478bd9Sstevel@tonic-gate * The inode is not updated if we're logging and the inode is a 14177c478bd9Sstevel@tonic-gate * directory with FRSYNC, FSYNC and FDSYNC flags set. 14187c478bd9Sstevel@tonic-gate */ 14197c478bd9Sstevel@tonic-gate if (ioflag & FRSYNC) { 14207c478bd9Sstevel@tonic-gate if (TRANS_ISTRANS(ufsvfsp) && ((ip->i_mode & IFMT) == IFDIR)) { 1421986fd29aSsetje doupdate = 0; 14227c478bd9Sstevel@tonic-gate } 14237c478bd9Sstevel@tonic-gate if (doupdate) { 14247c478bd9Sstevel@tonic-gate if ((ioflag & FSYNC) || 14257c478bd9Sstevel@tonic-gate ((ioflag & FDSYNC) && 14267c478bd9Sstevel@tonic-gate (ip->i_flag & (IATTCHG|IBDWRITE)))) { 14277c478bd9Sstevel@tonic-gate ufs_iupdat(ip, 1); 14287c478bd9Sstevel@tonic-gate } 14297c478bd9Sstevel@tonic-gate } 14307c478bd9Sstevel@tonic-gate } 14317c478bd9Sstevel@tonic-gate /* 14327c478bd9Sstevel@tonic-gate * If we've already done a partial read, terminate 14337c478bd9Sstevel@tonic-gate * the read but return no error. 14347c478bd9Sstevel@tonic-gate */ 14357c478bd9Sstevel@tonic-gate if (oresid != uio->uio_resid) 14367c478bd9Sstevel@tonic-gate error = 0; 14377c478bd9Sstevel@tonic-gate ITIMES(ip); 14387c478bd9Sstevel@tonic-gate 14397c478bd9Sstevel@tonic-gate return (error); 14407c478bd9Sstevel@tonic-gate } 14417c478bd9Sstevel@tonic-gate 14427c478bd9Sstevel@tonic-gate /* ARGSUSED */ 14437c478bd9Sstevel@tonic-gate static int 14447c478bd9Sstevel@tonic-gate ufs_ioctl( 14457c478bd9Sstevel@tonic-gate struct vnode *vp, 14467c478bd9Sstevel@tonic-gate int cmd, 14477c478bd9Sstevel@tonic-gate intptr_t arg, 14487c478bd9Sstevel@tonic-gate int flag, 14497c478bd9Sstevel@tonic-gate struct cred *cr, 1450da6c28aaSamw int *rvalp, 1451da6c28aaSamw caller_context_t *ct) 14527c478bd9Sstevel@tonic-gate { 14537c478bd9Sstevel@tonic-gate struct lockfs lockfs, lockfs_out; 14547c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = VTOI(vp)->i_ufsvfs; 14557c478bd9Sstevel@tonic-gate char *comment, *original_comment; 14567c478bd9Sstevel@tonic-gate struct fs *fs; 14577c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 14587c478bd9Sstevel@tonic-gate offset_t off; 14597c478bd9Sstevel@tonic-gate extern int maxphys; 14607c478bd9Sstevel@tonic-gate int error; 14617c478bd9Sstevel@tonic-gate int issync; 14627c478bd9Sstevel@tonic-gate int trans_size; 14637c478bd9Sstevel@tonic-gate 14647c478bd9Sstevel@tonic-gate 14657c478bd9Sstevel@tonic-gate /* 14667c478bd9Sstevel@tonic-gate * forcibly unmounted 14677c478bd9Sstevel@tonic-gate */ 146802ffed0eSjr if (ufsvfsp == NULL || vp->v_vfsp == NULL || 146902ffed0eSjr vp->v_vfsp->vfs_flag & VFS_UNMOUNTED) 14707c478bd9Sstevel@tonic-gate return (EIO); 14717c478bd9Sstevel@tonic-gate fs = ufsvfsp->vfs_fs; 14727c478bd9Sstevel@tonic-gate 14737c478bd9Sstevel@tonic-gate if (cmd == Q_QUOTACTL) { 14747c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_QUOTA_MASK); 14757c478bd9Sstevel@tonic-gate if (error) 14767c478bd9Sstevel@tonic-gate return (error); 14777c478bd9Sstevel@tonic-gate 14787c478bd9Sstevel@tonic-gate if (ulp) { 14797c478bd9Sstevel@tonic-gate TRANS_BEGIN_ASYNC(ufsvfsp, TOP_QUOTA, 148080d34432Sfrankho TOP_SETQUOTA_SIZE(fs)); 14817c478bd9Sstevel@tonic-gate } 14827c478bd9Sstevel@tonic-gate 14837c478bd9Sstevel@tonic-gate error = quotactl(vp, arg, flag, cr); 14847c478bd9Sstevel@tonic-gate 14857c478bd9Sstevel@tonic-gate if (ulp) { 14867c478bd9Sstevel@tonic-gate TRANS_END_ASYNC(ufsvfsp, TOP_QUOTA, 148780d34432Sfrankho TOP_SETQUOTA_SIZE(fs)); 14887c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 14897c478bd9Sstevel@tonic-gate } 14907c478bd9Sstevel@tonic-gate return (error); 14917c478bd9Sstevel@tonic-gate } 14927c478bd9Sstevel@tonic-gate 14937c478bd9Sstevel@tonic-gate switch (cmd) { 14947c478bd9Sstevel@tonic-gate case _FIOLFS: 14957c478bd9Sstevel@tonic-gate /* 14967c478bd9Sstevel@tonic-gate * file system locking 14977c478bd9Sstevel@tonic-gate */ 14987c478bd9Sstevel@tonic-gate if (secpolicy_fs_config(cr, ufsvfsp->vfs_vfs) != 0) 14997c478bd9Sstevel@tonic-gate return (EPERM); 15007c478bd9Sstevel@tonic-gate 15017c478bd9Sstevel@tonic-gate if ((flag & DATAMODEL_MASK) == DATAMODEL_NATIVE) { 15027c478bd9Sstevel@tonic-gate if (copyin((caddr_t)arg, &lockfs, 150380d34432Sfrankho sizeof (struct lockfs))) 15047c478bd9Sstevel@tonic-gate return (EFAULT); 15057c478bd9Sstevel@tonic-gate } 15067c478bd9Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL 15077c478bd9Sstevel@tonic-gate else { 15087c478bd9Sstevel@tonic-gate struct lockfs32 lockfs32; 15097c478bd9Sstevel@tonic-gate /* Translate ILP32 lockfs to LP64 lockfs */ 15107c478bd9Sstevel@tonic-gate if (copyin((caddr_t)arg, &lockfs32, 15117c478bd9Sstevel@tonic-gate sizeof (struct lockfs32))) 15127c478bd9Sstevel@tonic-gate return (EFAULT); 15137c478bd9Sstevel@tonic-gate lockfs.lf_lock = (ulong_t)lockfs32.lf_lock; 15147c478bd9Sstevel@tonic-gate lockfs.lf_flags = (ulong_t)lockfs32.lf_flags; 15157c478bd9Sstevel@tonic-gate lockfs.lf_key = (ulong_t)lockfs32.lf_key; 15167c478bd9Sstevel@tonic-gate lockfs.lf_comlen = (ulong_t)lockfs32.lf_comlen; 15177c478bd9Sstevel@tonic-gate lockfs.lf_comment = 151880d34432Sfrankho (caddr_t)(uintptr_t)lockfs32.lf_comment; 15197c478bd9Sstevel@tonic-gate } 15207c478bd9Sstevel@tonic-gate #endif /* _SYSCALL32_IMPL */ 15217c478bd9Sstevel@tonic-gate 15227c478bd9Sstevel@tonic-gate if (lockfs.lf_comlen) { 15237c478bd9Sstevel@tonic-gate if (lockfs.lf_comlen > LOCKFS_MAXCOMMENTLEN) 15247c478bd9Sstevel@tonic-gate return (ENAMETOOLONG); 152580d34432Sfrankho comment = 152680d34432Sfrankho kmem_alloc(lockfs.lf_comlen, KM_SLEEP); 15277c478bd9Sstevel@tonic-gate if (copyin(lockfs.lf_comment, comment, 152880d34432Sfrankho lockfs.lf_comlen)) { 15297c478bd9Sstevel@tonic-gate kmem_free(comment, lockfs.lf_comlen); 15307c478bd9Sstevel@tonic-gate return (EFAULT); 15317c478bd9Sstevel@tonic-gate } 15327c478bd9Sstevel@tonic-gate original_comment = lockfs.lf_comment; 15337c478bd9Sstevel@tonic-gate lockfs.lf_comment = comment; 15347c478bd9Sstevel@tonic-gate } 15357c478bd9Sstevel@tonic-gate if ((error = ufs_fiolfs(vp, &lockfs, 0)) == 0) { 15367c478bd9Sstevel@tonic-gate lockfs.lf_comment = original_comment; 15377c478bd9Sstevel@tonic-gate 15387c478bd9Sstevel@tonic-gate if ((flag & DATAMODEL_MASK) == 15397c478bd9Sstevel@tonic-gate DATAMODEL_NATIVE) { 15407c478bd9Sstevel@tonic-gate (void) copyout(&lockfs, (caddr_t)arg, 15417c478bd9Sstevel@tonic-gate sizeof (struct lockfs)); 15427c478bd9Sstevel@tonic-gate } 15437c478bd9Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL 15447c478bd9Sstevel@tonic-gate else { 15457c478bd9Sstevel@tonic-gate struct lockfs32 lockfs32; 15467c478bd9Sstevel@tonic-gate /* Translate LP64 to ILP32 lockfs */ 15477c478bd9Sstevel@tonic-gate lockfs32.lf_lock = 15487c478bd9Sstevel@tonic-gate (uint32_t)lockfs.lf_lock; 15497c478bd9Sstevel@tonic-gate lockfs32.lf_flags = 15507c478bd9Sstevel@tonic-gate (uint32_t)lockfs.lf_flags; 15517c478bd9Sstevel@tonic-gate lockfs32.lf_key = 15527c478bd9Sstevel@tonic-gate (uint32_t)lockfs.lf_key; 15537c478bd9Sstevel@tonic-gate lockfs32.lf_comlen = 15547c478bd9Sstevel@tonic-gate (uint32_t)lockfs.lf_comlen; 15557c478bd9Sstevel@tonic-gate lockfs32.lf_comment = 155680d34432Sfrankho (uint32_t)(uintptr_t) 155780d34432Sfrankho lockfs.lf_comment; 15587c478bd9Sstevel@tonic-gate (void) copyout(&lockfs32, (caddr_t)arg, 15597c478bd9Sstevel@tonic-gate sizeof (struct lockfs32)); 15607c478bd9Sstevel@tonic-gate } 15617c478bd9Sstevel@tonic-gate #endif /* _SYSCALL32_IMPL */ 15627c478bd9Sstevel@tonic-gate 15637c478bd9Sstevel@tonic-gate } else { 15647c478bd9Sstevel@tonic-gate if (lockfs.lf_comlen) 15657c478bd9Sstevel@tonic-gate kmem_free(comment, lockfs.lf_comlen); 15667c478bd9Sstevel@tonic-gate } 15677c478bd9Sstevel@tonic-gate return (error); 15687c478bd9Sstevel@tonic-gate 15697c478bd9Sstevel@tonic-gate case _FIOLFSS: 15707c478bd9Sstevel@tonic-gate /* 15717c478bd9Sstevel@tonic-gate * get file system locking status 15727c478bd9Sstevel@tonic-gate */ 15737c478bd9Sstevel@tonic-gate 15747c478bd9Sstevel@tonic-gate if ((flag & DATAMODEL_MASK) == DATAMODEL_NATIVE) { 15757c478bd9Sstevel@tonic-gate if (copyin((caddr_t)arg, &lockfs, 157680d34432Sfrankho sizeof (struct lockfs))) 15777c478bd9Sstevel@tonic-gate return (EFAULT); 15787c478bd9Sstevel@tonic-gate } 15797c478bd9Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL 15807c478bd9Sstevel@tonic-gate else { 15817c478bd9Sstevel@tonic-gate struct lockfs32 lockfs32; 15827c478bd9Sstevel@tonic-gate /* Translate ILP32 lockfs to LP64 lockfs */ 15837c478bd9Sstevel@tonic-gate if (copyin((caddr_t)arg, &lockfs32, 158480d34432Sfrankho sizeof (struct lockfs32))) 15857c478bd9Sstevel@tonic-gate return (EFAULT); 15867c478bd9Sstevel@tonic-gate lockfs.lf_lock = (ulong_t)lockfs32.lf_lock; 15877c478bd9Sstevel@tonic-gate lockfs.lf_flags = (ulong_t)lockfs32.lf_flags; 15887c478bd9Sstevel@tonic-gate lockfs.lf_key = (ulong_t)lockfs32.lf_key; 15897c478bd9Sstevel@tonic-gate lockfs.lf_comlen = (ulong_t)lockfs32.lf_comlen; 15907c478bd9Sstevel@tonic-gate lockfs.lf_comment = 159180d34432Sfrankho (caddr_t)(uintptr_t)lockfs32.lf_comment; 15927c478bd9Sstevel@tonic-gate } 15937c478bd9Sstevel@tonic-gate #endif /* _SYSCALL32_IMPL */ 15947c478bd9Sstevel@tonic-gate 15957c478bd9Sstevel@tonic-gate if (error = ufs_fiolfss(vp, &lockfs_out)) 15967c478bd9Sstevel@tonic-gate return (error); 15977c478bd9Sstevel@tonic-gate lockfs.lf_lock = lockfs_out.lf_lock; 15987c478bd9Sstevel@tonic-gate lockfs.lf_key = lockfs_out.lf_key; 15997c478bd9Sstevel@tonic-gate lockfs.lf_flags = lockfs_out.lf_flags; 16007c478bd9Sstevel@tonic-gate lockfs.lf_comlen = MIN(lockfs.lf_comlen, 160180d34432Sfrankho lockfs_out.lf_comlen); 16027c478bd9Sstevel@tonic-gate 16037c478bd9Sstevel@tonic-gate if ((flag & DATAMODEL_MASK) == DATAMODEL_NATIVE) { 16047c478bd9Sstevel@tonic-gate if (copyout(&lockfs, (caddr_t)arg, 160580d34432Sfrankho sizeof (struct lockfs))) 16067c478bd9Sstevel@tonic-gate return (EFAULT); 16077c478bd9Sstevel@tonic-gate } 16087c478bd9Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL 16097c478bd9Sstevel@tonic-gate else { 16107c478bd9Sstevel@tonic-gate /* Translate LP64 to ILP32 lockfs */ 16117c478bd9Sstevel@tonic-gate struct lockfs32 lockfs32; 16127c478bd9Sstevel@tonic-gate lockfs32.lf_lock = (uint32_t)lockfs.lf_lock; 16137c478bd9Sstevel@tonic-gate lockfs32.lf_flags = (uint32_t)lockfs.lf_flags; 16147c478bd9Sstevel@tonic-gate lockfs32.lf_key = (uint32_t)lockfs.lf_key; 16157c478bd9Sstevel@tonic-gate lockfs32.lf_comlen = (uint32_t)lockfs.lf_comlen; 16167c478bd9Sstevel@tonic-gate lockfs32.lf_comment = 161780d34432Sfrankho (uint32_t)(uintptr_t)lockfs.lf_comment; 16187c478bd9Sstevel@tonic-gate if (copyout(&lockfs32, (caddr_t)arg, 161980d34432Sfrankho sizeof (struct lockfs32))) 16207c478bd9Sstevel@tonic-gate return (EFAULT); 16217c478bd9Sstevel@tonic-gate } 16227c478bd9Sstevel@tonic-gate #endif /* _SYSCALL32_IMPL */ 16237c478bd9Sstevel@tonic-gate 16247c478bd9Sstevel@tonic-gate if (lockfs.lf_comlen && 16257c478bd9Sstevel@tonic-gate lockfs.lf_comment && lockfs_out.lf_comment) 16267c478bd9Sstevel@tonic-gate if (copyout(lockfs_out.lf_comment, 162780d34432Sfrankho lockfs.lf_comment, lockfs.lf_comlen)) 16287c478bd9Sstevel@tonic-gate return (EFAULT); 16297c478bd9Sstevel@tonic-gate return (0); 16307c478bd9Sstevel@tonic-gate 16317c478bd9Sstevel@tonic-gate case _FIOSATIME: 16327c478bd9Sstevel@tonic-gate /* 16337c478bd9Sstevel@tonic-gate * set access time 16347c478bd9Sstevel@tonic-gate */ 16357c478bd9Sstevel@tonic-gate 16367c478bd9Sstevel@tonic-gate /* 16377c478bd9Sstevel@tonic-gate * if mounted w/o atime, return quietly. 16387c478bd9Sstevel@tonic-gate * I briefly thought about returning ENOSYS, but 16397c478bd9Sstevel@tonic-gate * figured that most apps would consider this fatal 16407c478bd9Sstevel@tonic-gate * but the idea is to make this as seamless as poss. 16417c478bd9Sstevel@tonic-gate */ 16427c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_noatime) 16437c478bd9Sstevel@tonic-gate return (0); 16447c478bd9Sstevel@tonic-gate 16457c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, 164680d34432Sfrankho ULOCKFS_SETATTR_MASK); 16477c478bd9Sstevel@tonic-gate if (error) 16487c478bd9Sstevel@tonic-gate return (error); 16497c478bd9Sstevel@tonic-gate 16507c478bd9Sstevel@tonic-gate if (ulp) { 16517c478bd9Sstevel@tonic-gate trans_size = (int)TOP_SETATTR_SIZE(VTOI(vp)); 16527c478bd9Sstevel@tonic-gate TRANS_BEGIN_CSYNC(ufsvfsp, issync, 165380d34432Sfrankho TOP_SETATTR, trans_size); 16547c478bd9Sstevel@tonic-gate } 16557c478bd9Sstevel@tonic-gate 16567c478bd9Sstevel@tonic-gate error = ufs_fiosatime(vp, (struct timeval *)arg, 165780d34432Sfrankho flag, cr); 16587c478bd9Sstevel@tonic-gate 16597c478bd9Sstevel@tonic-gate if (ulp) { 16607c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, error, issync, 166180d34432Sfrankho TOP_SETATTR, trans_size); 16627c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 16637c478bd9Sstevel@tonic-gate } 16647c478bd9Sstevel@tonic-gate return (error); 16657c478bd9Sstevel@tonic-gate 16667c478bd9Sstevel@tonic-gate case _FIOSDIO: 16677c478bd9Sstevel@tonic-gate /* 16687c478bd9Sstevel@tonic-gate * set delayed-io 16697c478bd9Sstevel@tonic-gate */ 16707c478bd9Sstevel@tonic-gate return (ufs_fiosdio(vp, (uint_t *)arg, flag, cr)); 16717c478bd9Sstevel@tonic-gate 16727c478bd9Sstevel@tonic-gate case _FIOGDIO: 16737c478bd9Sstevel@tonic-gate /* 16747c478bd9Sstevel@tonic-gate * get delayed-io 16757c478bd9Sstevel@tonic-gate */ 16767c478bd9Sstevel@tonic-gate return (ufs_fiogdio(vp, (uint_t *)arg, flag, cr)); 16777c478bd9Sstevel@tonic-gate 16787c478bd9Sstevel@tonic-gate case _FIOIO: 16797c478bd9Sstevel@tonic-gate /* 16807c478bd9Sstevel@tonic-gate * inode open 16817c478bd9Sstevel@tonic-gate */ 16827c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, 168380d34432Sfrankho ULOCKFS_VGET_MASK); 16847c478bd9Sstevel@tonic-gate if (error) 16857c478bd9Sstevel@tonic-gate return (error); 16867c478bd9Sstevel@tonic-gate 16877c478bd9Sstevel@tonic-gate error = ufs_fioio(vp, (struct fioio *)arg, flag, cr); 16887c478bd9Sstevel@tonic-gate 16897c478bd9Sstevel@tonic-gate if (ulp) { 16907c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 16917c478bd9Sstevel@tonic-gate } 16927c478bd9Sstevel@tonic-gate return (error); 16937c478bd9Sstevel@tonic-gate 16947c478bd9Sstevel@tonic-gate case _FIOFFS: 16957c478bd9Sstevel@tonic-gate /* 16967c478bd9Sstevel@tonic-gate * file system flush (push w/invalidate) 16977c478bd9Sstevel@tonic-gate */ 16987c478bd9Sstevel@tonic-gate if ((caddr_t)arg != NULL) 16997c478bd9Sstevel@tonic-gate return (EINVAL); 17007c478bd9Sstevel@tonic-gate return (ufs_fioffs(vp, NULL, cr)); 17017c478bd9Sstevel@tonic-gate 17027c478bd9Sstevel@tonic-gate case _FIOISBUSY: 17037c478bd9Sstevel@tonic-gate /* 17047c478bd9Sstevel@tonic-gate * Contract-private interface for Legato 17057c478bd9Sstevel@tonic-gate * Purge this vnode from the DNLC and decide 17067c478bd9Sstevel@tonic-gate * if this vnode is busy (*arg == 1) or not 17077c478bd9Sstevel@tonic-gate * (*arg == 0) 17087c478bd9Sstevel@tonic-gate */ 17097c478bd9Sstevel@tonic-gate if (secpolicy_fs_config(cr, ufsvfsp->vfs_vfs) != 0) 17107c478bd9Sstevel@tonic-gate return (EPERM); 17117c478bd9Sstevel@tonic-gate error = ufs_fioisbusy(vp, (int *)arg, cr); 17127c478bd9Sstevel@tonic-gate return (error); 17137c478bd9Sstevel@tonic-gate 17147c478bd9Sstevel@tonic-gate case _FIODIRECTIO: 17157c478bd9Sstevel@tonic-gate return (ufs_fiodirectio(vp, (int)arg, cr)); 17167c478bd9Sstevel@tonic-gate 17177c478bd9Sstevel@tonic-gate case _FIOTUNE: 17187c478bd9Sstevel@tonic-gate /* 17197c478bd9Sstevel@tonic-gate * Tune the file system (aka setting fs attributes) 17207c478bd9Sstevel@tonic-gate */ 17217c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, 172280d34432Sfrankho ULOCKFS_SETATTR_MASK); 17237c478bd9Sstevel@tonic-gate if (error) 17247c478bd9Sstevel@tonic-gate return (error); 17257c478bd9Sstevel@tonic-gate 17267c478bd9Sstevel@tonic-gate error = ufs_fiotune(vp, (struct fiotune *)arg, cr); 17277c478bd9Sstevel@tonic-gate 17287c478bd9Sstevel@tonic-gate if (ulp) 17297c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 17307c478bd9Sstevel@tonic-gate return (error); 17317c478bd9Sstevel@tonic-gate 17327c478bd9Sstevel@tonic-gate case _FIOLOGENABLE: 17337c478bd9Sstevel@tonic-gate if (secpolicy_fs_config(cr, ufsvfsp->vfs_vfs) != 0) 17347c478bd9Sstevel@tonic-gate return (EPERM); 17357c478bd9Sstevel@tonic-gate return (ufs_fiologenable(vp, (void *)arg, cr, flag)); 17367c478bd9Sstevel@tonic-gate 17377c478bd9Sstevel@tonic-gate case _FIOLOGDISABLE: 17387c478bd9Sstevel@tonic-gate if (secpolicy_fs_config(cr, ufsvfsp->vfs_vfs) != 0) 17397c478bd9Sstevel@tonic-gate return (EPERM); 17407c478bd9Sstevel@tonic-gate return (ufs_fiologdisable(vp, (void *)arg, cr, flag)); 17417c478bd9Sstevel@tonic-gate 17427c478bd9Sstevel@tonic-gate case _FIOISLOG: 17437c478bd9Sstevel@tonic-gate return (ufs_fioislog(vp, (void *)arg, cr, flag)); 17447c478bd9Sstevel@tonic-gate 17457c478bd9Sstevel@tonic-gate case _FIOSNAPSHOTCREATE_MULTI: 17467c478bd9Sstevel@tonic-gate { 17477c478bd9Sstevel@tonic-gate struct fiosnapcreate_multi fc, *fcp; 17487c478bd9Sstevel@tonic-gate size_t fcm_size; 17497c478bd9Sstevel@tonic-gate 17507c478bd9Sstevel@tonic-gate if (copyin((void *)arg, &fc, sizeof (fc))) 17517c478bd9Sstevel@tonic-gate return (EFAULT); 17527c478bd9Sstevel@tonic-gate if (fc.backfilecount > MAX_BACKFILE_COUNT) 17537c478bd9Sstevel@tonic-gate return (EINVAL); 17547c478bd9Sstevel@tonic-gate fcm_size = sizeof (struct fiosnapcreate_multi) + 17557c478bd9Sstevel@tonic-gate (fc.backfilecount - 1) * sizeof (int); 17567c478bd9Sstevel@tonic-gate fcp = (struct fiosnapcreate_multi *) 17577c478bd9Sstevel@tonic-gate kmem_alloc(fcm_size, KM_SLEEP); 17587c478bd9Sstevel@tonic-gate if (copyin((void *)arg, fcp, fcm_size)) { 17597c478bd9Sstevel@tonic-gate kmem_free(fcp, fcm_size); 17607c478bd9Sstevel@tonic-gate return (EFAULT); 17617c478bd9Sstevel@tonic-gate } 17627c478bd9Sstevel@tonic-gate error = ufs_snap_create(vp, fcp, cr); 176395b7dc1dSmishra /* 176495b7dc1dSmishra * Do copyout even if there is an error because 176595b7dc1dSmishra * the details of error is stored in fcp. 176695b7dc1dSmishra */ 176795b7dc1dSmishra if (copyout(fcp, (void *)arg, fcm_size)) 17687c478bd9Sstevel@tonic-gate error = EFAULT; 17697c478bd9Sstevel@tonic-gate kmem_free(fcp, fcm_size); 17707c478bd9Sstevel@tonic-gate return (error); 17717c478bd9Sstevel@tonic-gate } 17727c478bd9Sstevel@tonic-gate 17737c478bd9Sstevel@tonic-gate case _FIOSNAPSHOTDELETE: 17747c478bd9Sstevel@tonic-gate { 17757c478bd9Sstevel@tonic-gate struct fiosnapdelete fc; 17767c478bd9Sstevel@tonic-gate 17777c478bd9Sstevel@tonic-gate if (copyin((void *)arg, &fc, sizeof (fc))) 17787c478bd9Sstevel@tonic-gate return (EFAULT); 17797c478bd9Sstevel@tonic-gate error = ufs_snap_delete(vp, &fc, cr); 17807c478bd9Sstevel@tonic-gate if (!error && copyout(&fc, (void *)arg, sizeof (fc))) 17817c478bd9Sstevel@tonic-gate error = EFAULT; 17827c478bd9Sstevel@tonic-gate return (error); 17837c478bd9Sstevel@tonic-gate } 17847c478bd9Sstevel@tonic-gate 17857c478bd9Sstevel@tonic-gate case _FIOGETSUPERBLOCK: 17867c478bd9Sstevel@tonic-gate if (copyout(fs, (void *)arg, SBSIZE)) 17877c478bd9Sstevel@tonic-gate return (EFAULT); 17887c478bd9Sstevel@tonic-gate return (0); 17897c478bd9Sstevel@tonic-gate 17907c478bd9Sstevel@tonic-gate case _FIOGETMAXPHYS: 17917c478bd9Sstevel@tonic-gate if (copyout(&maxphys, (void *)arg, sizeof (maxphys))) 17927c478bd9Sstevel@tonic-gate return (EFAULT); 17937c478bd9Sstevel@tonic-gate return (0); 17947c478bd9Sstevel@tonic-gate 17957c478bd9Sstevel@tonic-gate /* 17967c478bd9Sstevel@tonic-gate * The following 3 ioctls are for TSufs support 17977c478bd9Sstevel@tonic-gate * although could potentially be used elsewhere 17987c478bd9Sstevel@tonic-gate */ 17997c478bd9Sstevel@tonic-gate case _FIO_SET_LUFS_DEBUG: 18007c478bd9Sstevel@tonic-gate if (secpolicy_fs_config(cr, ufsvfsp->vfs_vfs) != 0) 18017c478bd9Sstevel@tonic-gate return (EPERM); 18027c478bd9Sstevel@tonic-gate lufs_debug = (uint32_t)arg; 18037c478bd9Sstevel@tonic-gate return (0); 18047c478bd9Sstevel@tonic-gate 18057c478bd9Sstevel@tonic-gate case _FIO_SET_LUFS_ERROR: 18067c478bd9Sstevel@tonic-gate if (secpolicy_fs_config(cr, ufsvfsp->vfs_vfs) != 0) 18077c478bd9Sstevel@tonic-gate return (EPERM); 18087c478bd9Sstevel@tonic-gate TRANS_SETERROR(ufsvfsp); 18097c478bd9Sstevel@tonic-gate return (0); 18107c478bd9Sstevel@tonic-gate 18117c478bd9Sstevel@tonic-gate case _FIO_GET_TOP_STATS: 18127c478bd9Sstevel@tonic-gate { 18137c478bd9Sstevel@tonic-gate fio_lufs_stats_t *ls; 18147c478bd9Sstevel@tonic-gate ml_unit_t *ul = ufsvfsp->vfs_log; 18157c478bd9Sstevel@tonic-gate 18167c478bd9Sstevel@tonic-gate ls = kmem_zalloc(sizeof (*ls), KM_SLEEP); 18177c478bd9Sstevel@tonic-gate ls->ls_debug = ul->un_debug; /* return debug value */ 18187c478bd9Sstevel@tonic-gate /* Copy stucture if statistics are being kept */ 18197c478bd9Sstevel@tonic-gate if (ul->un_logmap->mtm_tops) { 18207c478bd9Sstevel@tonic-gate ls->ls_topstats = *(ul->un_logmap->mtm_tops); 18217c478bd9Sstevel@tonic-gate } 18227c478bd9Sstevel@tonic-gate error = 0; 18237c478bd9Sstevel@tonic-gate if (copyout(ls, (void *)arg, sizeof (*ls))) 18247c478bd9Sstevel@tonic-gate error = EFAULT; 18257c478bd9Sstevel@tonic-gate kmem_free(ls, sizeof (*ls)); 18267c478bd9Sstevel@tonic-gate return (error); 18277c478bd9Sstevel@tonic-gate } 18287c478bd9Sstevel@tonic-gate 18297c478bd9Sstevel@tonic-gate case _FIO_SEEK_DATA: 18307c478bd9Sstevel@tonic-gate case _FIO_SEEK_HOLE: 18317c478bd9Sstevel@tonic-gate if (ddi_copyin((void *)arg, &off, sizeof (off), flag)) 18327c478bd9Sstevel@tonic-gate return (EFAULT); 18337c478bd9Sstevel@tonic-gate /* offset paramater is in/out */ 18347c478bd9Sstevel@tonic-gate error = ufs_fio_holey(vp, cmd, &off); 18357c478bd9Sstevel@tonic-gate if (error) 18367c478bd9Sstevel@tonic-gate return (error); 18377c478bd9Sstevel@tonic-gate if (ddi_copyout(&off, (void *)arg, sizeof (off), flag)) 18387c478bd9Sstevel@tonic-gate return (EFAULT); 18397c478bd9Sstevel@tonic-gate return (0); 18407c478bd9Sstevel@tonic-gate 1841986fd29aSsetje case _FIO_COMPRESSED: 1842986fd29aSsetje { 1843986fd29aSsetje /* 1844986fd29aSsetje * This is a project private ufs ioctl() to mark 1845986fd29aSsetje * the inode as that belonging to a compressed 1846986fd29aSsetje * file. This is used to mark individual 1847342440ecSPrasad Singamsetty * compressed files in a miniroot archive. 1848986fd29aSsetje * The files compressed in this manner are 1849986fd29aSsetje * automatically decompressed by the dcfs filesystem 1850986fd29aSsetje * (via an interception in ufs_lookup - see decompvp()) 1851986fd29aSsetje * which is layered on top of ufs on a system running 1852342440ecSPrasad Singamsetty * from the archive. See uts/common/fs/dcfs for details. 1853986fd29aSsetje * This ioctl only marks the file as compressed - the 1854986fd29aSsetje * actual compression is done by fiocompress (a 1855986fd29aSsetje * userland utility) which invokes this ioctl(). 1856986fd29aSsetje */ 1857986fd29aSsetje struct inode *ip = VTOI(vp); 1858986fd29aSsetje 1859986fd29aSsetje error = ufs_lockfs_begin(ufsvfsp, &ulp, 1860986fd29aSsetje ULOCKFS_SETATTR_MASK); 1861986fd29aSsetje if (error) 1862986fd29aSsetje return (error); 1863986fd29aSsetje 1864986fd29aSsetje if (ulp) { 1865986fd29aSsetje TRANS_BEGIN_ASYNC(ufsvfsp, TOP_IUPDAT, 1866986fd29aSsetje TOP_IUPDAT_SIZE(ip)); 1867986fd29aSsetje } 1868986fd29aSsetje 1869986fd29aSsetje error = ufs_mark_compressed(vp); 1870986fd29aSsetje 1871986fd29aSsetje if (ulp) { 1872986fd29aSsetje TRANS_END_ASYNC(ufsvfsp, TOP_IUPDAT, 1873986fd29aSsetje TOP_IUPDAT_SIZE(ip)); 1874986fd29aSsetje ufs_lockfs_end(ulp); 1875986fd29aSsetje } 1876986fd29aSsetje 1877986fd29aSsetje return (error); 1878986fd29aSsetje 1879986fd29aSsetje } 1880986fd29aSsetje 18817c478bd9Sstevel@tonic-gate default: 18827c478bd9Sstevel@tonic-gate return (ENOTTY); 18837c478bd9Sstevel@tonic-gate } 18847c478bd9Sstevel@tonic-gate } 18857c478bd9Sstevel@tonic-gate 1886986fd29aSsetje 18877c478bd9Sstevel@tonic-gate /* ARGSUSED */ 18887c478bd9Sstevel@tonic-gate static int 18897c478bd9Sstevel@tonic-gate ufs_getattr(struct vnode *vp, struct vattr *vap, int flags, 189080d5689fSPatrick Mooney struct cred *cr, caller_context_t *ct) 18917c478bd9Sstevel@tonic-gate { 18927c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 18937c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 18947c478bd9Sstevel@tonic-gate int err; 18957c478bd9Sstevel@tonic-gate 18967c478bd9Sstevel@tonic-gate if (vap->va_mask == AT_SIZE) { 18977c478bd9Sstevel@tonic-gate /* 18987c478bd9Sstevel@tonic-gate * for performance, if only the size is requested don't bother 18997c478bd9Sstevel@tonic-gate * with anything else. 19007c478bd9Sstevel@tonic-gate */ 19017c478bd9Sstevel@tonic-gate UFS_GET_ISIZE(&vap->va_size, ip); 19027c478bd9Sstevel@tonic-gate return (0); 19037c478bd9Sstevel@tonic-gate } 19047c478bd9Sstevel@tonic-gate 19057c478bd9Sstevel@tonic-gate /* 19067c478bd9Sstevel@tonic-gate * inlined lockfs checks 19077c478bd9Sstevel@tonic-gate */ 19087c478bd9Sstevel@tonic-gate ufsvfsp = ip->i_ufsvfs; 19097c478bd9Sstevel@tonic-gate if ((ufsvfsp == NULL) || ULOCKFS_IS_HLOCK(&ufsvfsp->vfs_ulockfs)) { 19107c478bd9Sstevel@tonic-gate err = EIO; 19117c478bd9Sstevel@tonic-gate goto out; 19127c478bd9Sstevel@tonic-gate } 19137c478bd9Sstevel@tonic-gate 19147c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 19157c478bd9Sstevel@tonic-gate /* 19167c478bd9Sstevel@tonic-gate * Return all the attributes. This should be refined so 19177c478bd9Sstevel@tonic-gate * that it only returns what's asked for. 19187c478bd9Sstevel@tonic-gate */ 19197c478bd9Sstevel@tonic-gate 19207c478bd9Sstevel@tonic-gate /* 19217c478bd9Sstevel@tonic-gate * Copy from inode table. 19227c478bd9Sstevel@tonic-gate */ 19237c478bd9Sstevel@tonic-gate vap->va_type = vp->v_type; 19247c478bd9Sstevel@tonic-gate vap->va_mode = ip->i_mode & MODEMASK; 19257c478bd9Sstevel@tonic-gate /* 19267c478bd9Sstevel@tonic-gate * If there is an ACL and there is a mask entry, then do the 19277c478bd9Sstevel@tonic-gate * extra work that completes the equivalent of an acltomode(3) 19287c478bd9Sstevel@tonic-gate * call. According to POSIX P1003.1e, the acl mask should be 19297c478bd9Sstevel@tonic-gate * returned in the group permissions field. 19307c478bd9Sstevel@tonic-gate * 19317c478bd9Sstevel@tonic-gate * - start with the original permission and mode bits (from above) 19327c478bd9Sstevel@tonic-gate * - clear the group owner bits 19337c478bd9Sstevel@tonic-gate * - add in the mask bits. 19347c478bd9Sstevel@tonic-gate */ 19357c478bd9Sstevel@tonic-gate if (ip->i_ufs_acl && ip->i_ufs_acl->aclass.acl_ismask) { 19367c478bd9Sstevel@tonic-gate vap->va_mode &= ~((VREAD | VWRITE | VEXEC) >> 3); 19377c478bd9Sstevel@tonic-gate vap->va_mode |= 19387c478bd9Sstevel@tonic-gate (ip->i_ufs_acl->aclass.acl_maskbits & PERMMASK) << 3; 19397c478bd9Sstevel@tonic-gate } 19407c478bd9Sstevel@tonic-gate vap->va_uid = ip->i_uid; 19417c478bd9Sstevel@tonic-gate vap->va_gid = ip->i_gid; 19427c478bd9Sstevel@tonic-gate vap->va_fsid = ip->i_dev; 19437c478bd9Sstevel@tonic-gate vap->va_nodeid = (ino64_t)ip->i_number; 19447c478bd9Sstevel@tonic-gate vap->va_nlink = ip->i_nlink; 19457c478bd9Sstevel@tonic-gate vap->va_size = ip->i_size; 19467c478bd9Sstevel@tonic-gate if (vp->v_type == VCHR || vp->v_type == VBLK) 19477c478bd9Sstevel@tonic-gate vap->va_rdev = ip->i_rdev; 19487c478bd9Sstevel@tonic-gate else 19497c478bd9Sstevel@tonic-gate vap->va_rdev = 0; /* not a b/c spec. */ 19507c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 19517c478bd9Sstevel@tonic-gate ITIMES_NOLOCK(ip); /* mark correct time in inode */ 19527c478bd9Sstevel@tonic-gate vap->va_seq = ip->i_seq; 19537c478bd9Sstevel@tonic-gate vap->va_atime.tv_sec = (time_t)ip->i_atime.tv_sec; 19547c478bd9Sstevel@tonic-gate vap->va_atime.tv_nsec = ip->i_atime.tv_usec*1000; 19557c478bd9Sstevel@tonic-gate vap->va_mtime.tv_sec = (time_t)ip->i_mtime.tv_sec; 19567c478bd9Sstevel@tonic-gate vap->va_mtime.tv_nsec = ip->i_mtime.tv_usec*1000; 19577c478bd9Sstevel@tonic-gate vap->va_ctime.tv_sec = (time_t)ip->i_ctime.tv_sec; 19587c478bd9Sstevel@tonic-gate vap->va_ctime.tv_nsec = ip->i_ctime.tv_usec*1000; 19597c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 19607c478bd9Sstevel@tonic-gate 19617c478bd9Sstevel@tonic-gate switch (ip->i_mode & IFMT) { 19627c478bd9Sstevel@tonic-gate 19637c478bd9Sstevel@tonic-gate case IFBLK: 19647c478bd9Sstevel@tonic-gate vap->va_blksize = MAXBSIZE; /* was BLKDEV_IOSIZE */ 19657c478bd9Sstevel@tonic-gate break; 19667c478bd9Sstevel@tonic-gate 19677c478bd9Sstevel@tonic-gate case IFCHR: 19687c478bd9Sstevel@tonic-gate vap->va_blksize = MAXBSIZE; 19697c478bd9Sstevel@tonic-gate break; 19707c478bd9Sstevel@tonic-gate 19717c478bd9Sstevel@tonic-gate default: 19727c478bd9Sstevel@tonic-gate vap->va_blksize = ip->i_fs->fs_bsize; 19737c478bd9Sstevel@tonic-gate break; 19747c478bd9Sstevel@tonic-gate } 19757c478bd9Sstevel@tonic-gate vap->va_nblocks = (fsblkcnt64_t)ip->i_blocks; 19767c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 19777c478bd9Sstevel@tonic-gate err = 0; 19787c478bd9Sstevel@tonic-gate 19797c478bd9Sstevel@tonic-gate out: 19807c478bd9Sstevel@tonic-gate return (err); 19817c478bd9Sstevel@tonic-gate } 19827c478bd9Sstevel@tonic-gate 198360c8e821SFrank Batschulat /* 198460c8e821SFrank Batschulat * Special wrapper to provide a callback for secpolicy_vnode_setattr(). 198560c8e821SFrank Batschulat * The i_contents lock is already held by the caller and we need to 198660c8e821SFrank Batschulat * declare the inode as 'void *' argument. 198760c8e821SFrank Batschulat */ 198860c8e821SFrank Batschulat static int 198960c8e821SFrank Batschulat ufs_priv_access(void *vip, int mode, struct cred *cr) 199060c8e821SFrank Batschulat { 199160c8e821SFrank Batschulat struct inode *ip = vip; 199260c8e821SFrank Batschulat 199360c8e821SFrank Batschulat return (ufs_iaccess(ip, mode, cr, 0)); 199460c8e821SFrank Batschulat } 199560c8e821SFrank Batschulat 19967c478bd9Sstevel@tonic-gate /*ARGSUSED4*/ 19977c478bd9Sstevel@tonic-gate static int 199880d5689fSPatrick Mooney ufs_setattr(struct vnode *vp, struct vattr *vap, int flags, struct cred *cr, 199980d5689fSPatrick Mooney caller_context_t *ct) 20007c478bd9Sstevel@tonic-gate { 20017c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 20027c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = ip->i_ufsvfs; 20037c478bd9Sstevel@tonic-gate struct fs *fs; 20047c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 20057c478bd9Sstevel@tonic-gate char *errmsg1; 20067c478bd9Sstevel@tonic-gate char *errmsg2; 20077c478bd9Sstevel@tonic-gate long blocks; 20087c478bd9Sstevel@tonic-gate long int mask = vap->va_mask; 20097c478bd9Sstevel@tonic-gate size_t len1, len2; 20107c478bd9Sstevel@tonic-gate int issync; 20117c478bd9Sstevel@tonic-gate int trans_size; 20127c478bd9Sstevel@tonic-gate int dotrans; 20137c478bd9Sstevel@tonic-gate int dorwlock; 20147c478bd9Sstevel@tonic-gate int error; 20157c478bd9Sstevel@tonic-gate int owner_change; 20167c478bd9Sstevel@tonic-gate int dodqlock; 20177c478bd9Sstevel@tonic-gate timestruc_t now; 20187c478bd9Sstevel@tonic-gate vattr_t oldva; 20197c478bd9Sstevel@tonic-gate int retry = 1; 202002ff05a9Svsakar int indeadlock; 20217c478bd9Sstevel@tonic-gate 20227c478bd9Sstevel@tonic-gate /* 20237c478bd9Sstevel@tonic-gate * Cannot set these attributes. 20247c478bd9Sstevel@tonic-gate */ 2025da6c28aaSamw if ((mask & AT_NOSET) || (mask & AT_XVATTR)) 2026da6c28aaSamw return (EINVAL); 20277c478bd9Sstevel@tonic-gate 20287c478bd9Sstevel@tonic-gate /* 20297c478bd9Sstevel@tonic-gate * check for forced unmount 20307c478bd9Sstevel@tonic-gate */ 20317c478bd9Sstevel@tonic-gate if (ufsvfsp == NULL) 20327c478bd9Sstevel@tonic-gate return (EIO); 20337c478bd9Sstevel@tonic-gate 20347c478bd9Sstevel@tonic-gate fs = ufsvfsp->vfs_fs; 20357c478bd9Sstevel@tonic-gate if (fs->fs_ronly != 0) 20367c478bd9Sstevel@tonic-gate return (EROFS); 20377c478bd9Sstevel@tonic-gate 20387c478bd9Sstevel@tonic-gate again: 20397c478bd9Sstevel@tonic-gate errmsg1 = NULL; 20407c478bd9Sstevel@tonic-gate errmsg2 = NULL; 20417c478bd9Sstevel@tonic-gate dotrans = 0; 20427c478bd9Sstevel@tonic-gate dorwlock = 0; 20437c478bd9Sstevel@tonic-gate dodqlock = 0; 20447c478bd9Sstevel@tonic-gate 20457c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_SETATTR_MASK); 20467c478bd9Sstevel@tonic-gate if (error) 20477c478bd9Sstevel@tonic-gate goto out; 20487c478bd9Sstevel@tonic-gate 20497c478bd9Sstevel@tonic-gate /* 20507c478bd9Sstevel@tonic-gate * Acquire i_rwlock before TRANS_BEGIN_CSYNC() if this is a file. 20517c478bd9Sstevel@tonic-gate * This follows the protocol for read()/write(). 20527c478bd9Sstevel@tonic-gate */ 20537c478bd9Sstevel@tonic-gate if (vp->v_type != VDIR) { 205402ff05a9Svsakar /* 205502ff05a9Svsakar * ufs_tryirwlock uses rw_tryenter and checks for SLOCK to 205602ff05a9Svsakar * avoid i_rwlock, ufs_lockfs_begin deadlock. If deadlock 205702ff05a9Svsakar * possible, retries the operation. 205802ff05a9Svsakar */ 205902ff05a9Svsakar ufs_tryirwlock(&ip->i_rwlock, RW_WRITER, retry_file); 206002ff05a9Svsakar if (indeadlock) { 206102ff05a9Svsakar if (ulp) 206202ff05a9Svsakar ufs_lockfs_end(ulp); 206302ff05a9Svsakar goto again; 206402ff05a9Svsakar } 20657c478bd9Sstevel@tonic-gate dorwlock = 1; 20667c478bd9Sstevel@tonic-gate } 20677c478bd9Sstevel@tonic-gate 20687c478bd9Sstevel@tonic-gate /* 20697c478bd9Sstevel@tonic-gate * Truncate file. Must have write permission and not be a directory. 20707c478bd9Sstevel@tonic-gate */ 20717c478bd9Sstevel@tonic-gate if (mask & AT_SIZE) { 20727c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 20737c478bd9Sstevel@tonic-gate if (vp->v_type == VDIR) { 20747c478bd9Sstevel@tonic-gate error = EISDIR; 20757c478bd9Sstevel@tonic-gate goto update_inode; 20767c478bd9Sstevel@tonic-gate } 207760c8e821SFrank Batschulat if (error = ufs_iaccess(ip, IWRITE, cr, 0)) 20787c478bd9Sstevel@tonic-gate goto update_inode; 20797c478bd9Sstevel@tonic-gate 20807c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 20817c478bd9Sstevel@tonic-gate error = TRANS_ITRUNC(ip, vap->va_size, 0, cr); 20827c478bd9Sstevel@tonic-gate if (error) { 20837c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 20847c478bd9Sstevel@tonic-gate goto update_inode; 20857c478bd9Sstevel@tonic-gate } 208672102e74SBryan Cantrill 208772102e74SBryan Cantrill if (error == 0 && vap->va_size) 208872102e74SBryan Cantrill vnevent_truncate(vp, ct); 20897c478bd9Sstevel@tonic-gate } 20907c478bd9Sstevel@tonic-gate 20917c478bd9Sstevel@tonic-gate if (ulp) { 20927c478bd9Sstevel@tonic-gate trans_size = (int)TOP_SETATTR_SIZE(ip); 20937c478bd9Sstevel@tonic-gate TRANS_BEGIN_CSYNC(ufsvfsp, issync, TOP_SETATTR, trans_size); 20947c478bd9Sstevel@tonic-gate ++dotrans; 20957c478bd9Sstevel@tonic-gate } 20967c478bd9Sstevel@tonic-gate 20977c478bd9Sstevel@tonic-gate /* 20987c478bd9Sstevel@tonic-gate * Acquire i_rwlock after TRANS_BEGIN_CSYNC() if this is a directory. 20997c478bd9Sstevel@tonic-gate * This follows the protocol established by 21007c478bd9Sstevel@tonic-gate * ufs_link/create/remove/rename/mkdir/rmdir/symlink. 21017c478bd9Sstevel@tonic-gate */ 21027c478bd9Sstevel@tonic-gate if (vp->v_type == VDIR) { 210302ff05a9Svsakar ufs_tryirwlock_trans(&ip->i_rwlock, RW_WRITER, TOP_SETATTR, 210480d34432Sfrankho retry_dir); 210502ff05a9Svsakar if (indeadlock) 210602ff05a9Svsakar goto again; 21077c478bd9Sstevel@tonic-gate dorwlock = 1; 21087c478bd9Sstevel@tonic-gate } 21097c478bd9Sstevel@tonic-gate 21107c478bd9Sstevel@tonic-gate /* 21117c478bd9Sstevel@tonic-gate * Grab quota lock if we are changing the file's owner. 21127c478bd9Sstevel@tonic-gate */ 21137c478bd9Sstevel@tonic-gate if (mask & AT_UID) { 21147c478bd9Sstevel@tonic-gate rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 21157c478bd9Sstevel@tonic-gate dodqlock = 1; 21167c478bd9Sstevel@tonic-gate } 21177c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 21187c478bd9Sstevel@tonic-gate 21197c478bd9Sstevel@tonic-gate oldva.va_mode = ip->i_mode; 21207c478bd9Sstevel@tonic-gate oldva.va_uid = ip->i_uid; 21217c478bd9Sstevel@tonic-gate oldva.va_gid = ip->i_gid; 21227c478bd9Sstevel@tonic-gate 21237c478bd9Sstevel@tonic-gate vap->va_mask &= ~AT_SIZE; 212460c8e821SFrank Batschulat 21257c478bd9Sstevel@tonic-gate error = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 212660c8e821SFrank Batschulat ufs_priv_access, ip); 21277c478bd9Sstevel@tonic-gate if (error) 21287c478bd9Sstevel@tonic-gate goto update_inode; 21297c478bd9Sstevel@tonic-gate 21307c478bd9Sstevel@tonic-gate mask = vap->va_mask; 21317c478bd9Sstevel@tonic-gate 21327c478bd9Sstevel@tonic-gate /* 21337c478bd9Sstevel@tonic-gate * Change file access modes. 21347c478bd9Sstevel@tonic-gate */ 21357c478bd9Sstevel@tonic-gate if (mask & AT_MODE) { 21367c478bd9Sstevel@tonic-gate ip->i_mode = (ip->i_mode & IFMT) | (vap->va_mode & ~IFMT); 21377c478bd9Sstevel@tonic-gate TRANS_INODE(ufsvfsp, ip); 21387c478bd9Sstevel@tonic-gate ip->i_flag |= ICHG; 21397c478bd9Sstevel@tonic-gate if (stickyhack) { 21407c478bd9Sstevel@tonic-gate mutex_enter(&vp->v_lock); 21417c478bd9Sstevel@tonic-gate if ((ip->i_mode & (ISVTX | IEXEC | IFDIR)) == ISVTX) 21427c478bd9Sstevel@tonic-gate vp->v_flag |= VSWAPLIKE; 21437c478bd9Sstevel@tonic-gate else 21447c478bd9Sstevel@tonic-gate vp->v_flag &= ~VSWAPLIKE; 21457c478bd9Sstevel@tonic-gate mutex_exit(&vp->v_lock); 21467c478bd9Sstevel@tonic-gate } 21477c478bd9Sstevel@tonic-gate } 21487c478bd9Sstevel@tonic-gate if (mask & (AT_UID|AT_GID)) { 21497c478bd9Sstevel@tonic-gate if (mask & AT_UID) { 21507c478bd9Sstevel@tonic-gate /* 21517c478bd9Sstevel@tonic-gate * Don't change ownership of the quota inode. 21527c478bd9Sstevel@tonic-gate */ 21537c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_qinod == ip) { 21547c478bd9Sstevel@tonic-gate ASSERT(ufsvfsp->vfs_qflags & MQ_ENABLED); 21557c478bd9Sstevel@tonic-gate error = EINVAL; 21567c478bd9Sstevel@tonic-gate goto update_inode; 21577c478bd9Sstevel@tonic-gate } 21587c478bd9Sstevel@tonic-gate 21597c478bd9Sstevel@tonic-gate /* 21607c478bd9Sstevel@tonic-gate * No real ownership change. 21617c478bd9Sstevel@tonic-gate */ 21627c478bd9Sstevel@tonic-gate if (ip->i_uid == vap->va_uid) { 21637c478bd9Sstevel@tonic-gate blocks = 0; 21647c478bd9Sstevel@tonic-gate owner_change = 0; 21657c478bd9Sstevel@tonic-gate } 21667c478bd9Sstevel@tonic-gate /* 21677c478bd9Sstevel@tonic-gate * Remove the blocks and the file, from the old user's 21687c478bd9Sstevel@tonic-gate * quota. 21697c478bd9Sstevel@tonic-gate */ 21707c478bd9Sstevel@tonic-gate else { 21717c478bd9Sstevel@tonic-gate blocks = ip->i_blocks; 21727c478bd9Sstevel@tonic-gate owner_change = 1; 21737c478bd9Sstevel@tonic-gate 21747c478bd9Sstevel@tonic-gate (void) chkdq(ip, -blocks, /* force */ 1, cr, 217580d34432Sfrankho (char **)NULL, (size_t *)NULL); 21767c478bd9Sstevel@tonic-gate (void) chkiq(ufsvfsp, /* change */ -1, ip, 217780d34432Sfrankho (uid_t)ip->i_uid, /* force */ 1, cr, 217880d34432Sfrankho (char **)NULL, (size_t *)NULL); 21797c478bd9Sstevel@tonic-gate dqrele(ip->i_dquot); 21807c478bd9Sstevel@tonic-gate } 21817c478bd9Sstevel@tonic-gate 21827c478bd9Sstevel@tonic-gate ip->i_uid = vap->va_uid; 21837c478bd9Sstevel@tonic-gate 21847c478bd9Sstevel@tonic-gate /* 21857c478bd9Sstevel@tonic-gate * There is a real ownership change. 21867c478bd9Sstevel@tonic-gate */ 21877c478bd9Sstevel@tonic-gate if (owner_change) { 21887c478bd9Sstevel@tonic-gate /* 21897c478bd9Sstevel@tonic-gate * Add the blocks and the file to the new 21907c478bd9Sstevel@tonic-gate * user's quota. 21917c478bd9Sstevel@tonic-gate */ 21927c478bd9Sstevel@tonic-gate ip->i_dquot = getinoquota(ip); 21937c478bd9Sstevel@tonic-gate (void) chkdq(ip, blocks, /* force */ 1, cr, 219480d34432Sfrankho &errmsg1, &len1); 21957c478bd9Sstevel@tonic-gate (void) chkiq(ufsvfsp, /* change */ 1, 219680d34432Sfrankho (struct inode *)NULL, (uid_t)ip->i_uid, 219780d34432Sfrankho /* force */ 1, cr, &errmsg2, &len2); 21987c478bd9Sstevel@tonic-gate } 21997c478bd9Sstevel@tonic-gate } 22007c478bd9Sstevel@tonic-gate if (mask & AT_GID) { 22017c478bd9Sstevel@tonic-gate ip->i_gid = vap->va_gid; 22027c478bd9Sstevel@tonic-gate } 22037c478bd9Sstevel@tonic-gate TRANS_INODE(ufsvfsp, ip); 22047c478bd9Sstevel@tonic-gate ip->i_flag |= ICHG; 22057c478bd9Sstevel@tonic-gate } 22067c478bd9Sstevel@tonic-gate /* 22077c478bd9Sstevel@tonic-gate * Change file access or modified times. 22087c478bd9Sstevel@tonic-gate */ 22097c478bd9Sstevel@tonic-gate if (mask & (AT_ATIME|AT_MTIME)) { 22107c478bd9Sstevel@tonic-gate /* Check that the time value is within ufs range */ 22117c478bd9Sstevel@tonic-gate if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || 22127c478bd9Sstevel@tonic-gate ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { 22137c478bd9Sstevel@tonic-gate error = EOVERFLOW; 22147c478bd9Sstevel@tonic-gate goto update_inode; 22157c478bd9Sstevel@tonic-gate } 22167c478bd9Sstevel@tonic-gate 22177c478bd9Sstevel@tonic-gate /* 22187c478bd9Sstevel@tonic-gate * if the "noaccess" mount option is set and only atime 22197c478bd9Sstevel@tonic-gate * update is requested, do nothing. No error is returned. 22207c478bd9Sstevel@tonic-gate */ 22217c478bd9Sstevel@tonic-gate if ((ufsvfsp->vfs_noatime) && 22227c478bd9Sstevel@tonic-gate ((mask & (AT_ATIME|AT_MTIME)) == AT_ATIME)) 22237c478bd9Sstevel@tonic-gate goto skip_atime; 22247c478bd9Sstevel@tonic-gate 22257c478bd9Sstevel@tonic-gate if (mask & AT_ATIME) { 22267c478bd9Sstevel@tonic-gate ip->i_atime.tv_sec = vap->va_atime.tv_sec; 22277c478bd9Sstevel@tonic-gate ip->i_atime.tv_usec = vap->va_atime.tv_nsec / 1000; 22287c478bd9Sstevel@tonic-gate ip->i_flag &= ~IACC; 22297c478bd9Sstevel@tonic-gate } 22307c478bd9Sstevel@tonic-gate if (mask & AT_MTIME) { 22317c478bd9Sstevel@tonic-gate ip->i_mtime.tv_sec = vap->va_mtime.tv_sec; 22327c478bd9Sstevel@tonic-gate ip->i_mtime.tv_usec = vap->va_mtime.tv_nsec / 1000; 22337c478bd9Sstevel@tonic-gate gethrestime(&now); 22347c478bd9Sstevel@tonic-gate if (now.tv_sec > TIME32_MAX) { 22357c478bd9Sstevel@tonic-gate /* 22367c478bd9Sstevel@tonic-gate * In 2038, ctime sticks forever.. 22377c478bd9Sstevel@tonic-gate */ 22387c478bd9Sstevel@tonic-gate ip->i_ctime.tv_sec = TIME32_MAX; 22397c478bd9Sstevel@tonic-gate ip->i_ctime.tv_usec = 0; 22407c478bd9Sstevel@tonic-gate } else { 22417c478bd9Sstevel@tonic-gate ip->i_ctime.tv_sec = now.tv_sec; 22427c478bd9Sstevel@tonic-gate ip->i_ctime.tv_usec = now.tv_nsec / 1000; 22437c478bd9Sstevel@tonic-gate } 22447c478bd9Sstevel@tonic-gate ip->i_flag &= ~(IUPD|ICHG); 22457c478bd9Sstevel@tonic-gate ip->i_flag |= IMODTIME; 22467c478bd9Sstevel@tonic-gate } 22477c478bd9Sstevel@tonic-gate TRANS_INODE(ufsvfsp, ip); 22487c478bd9Sstevel@tonic-gate ip->i_flag |= IMOD; 22497c478bd9Sstevel@tonic-gate } 22507c478bd9Sstevel@tonic-gate 22517c478bd9Sstevel@tonic-gate skip_atime: 22527c478bd9Sstevel@tonic-gate /* 22537c478bd9Sstevel@tonic-gate * The presence of a shadow inode may indicate an ACL, but does 22547c478bd9Sstevel@tonic-gate * not imply an ACL. Future FSD types should be handled here too 22557c478bd9Sstevel@tonic-gate * and check for the presence of the attribute-specific data 22567c478bd9Sstevel@tonic-gate * before referencing it. 22577c478bd9Sstevel@tonic-gate */ 22587c478bd9Sstevel@tonic-gate if (ip->i_shadow) { 22597c478bd9Sstevel@tonic-gate /* 22607c478bd9Sstevel@tonic-gate * XXX if ufs_iupdat is changed to sandbagged write fix 22617c478bd9Sstevel@tonic-gate * ufs_acl_setattr to push ip to keep acls consistent 22627c478bd9Sstevel@tonic-gate * 22637c478bd9Sstevel@tonic-gate * Suppress out of inodes messages if we will retry. 22647c478bd9Sstevel@tonic-gate */ 22657c478bd9Sstevel@tonic-gate if (retry) 22667c478bd9Sstevel@tonic-gate ip->i_flag |= IQUIET; 22677c478bd9Sstevel@tonic-gate error = ufs_acl_setattr(ip, vap, cr); 22687c478bd9Sstevel@tonic-gate ip->i_flag &= ~IQUIET; 22697c478bd9Sstevel@tonic-gate } 22707c478bd9Sstevel@tonic-gate 22717c478bd9Sstevel@tonic-gate update_inode: 22727c478bd9Sstevel@tonic-gate /* 22737c478bd9Sstevel@tonic-gate * Setattr always increases the sequence number 22747c478bd9Sstevel@tonic-gate */ 22757c478bd9Sstevel@tonic-gate ip->i_seq++; 22767c478bd9Sstevel@tonic-gate 22777c478bd9Sstevel@tonic-gate /* 22787c478bd9Sstevel@tonic-gate * if nfsd and not logging; push synchronously 22797c478bd9Sstevel@tonic-gate */ 22807c478bd9Sstevel@tonic-gate if ((curthread->t_flag & T_DONTPEND) && !TRANS_ISTRANS(ufsvfsp)) { 22817c478bd9Sstevel@tonic-gate ufs_iupdat(ip, 1); 22827c478bd9Sstevel@tonic-gate } else { 22837c478bd9Sstevel@tonic-gate ITIMES_NOLOCK(ip); 22847c478bd9Sstevel@tonic-gate } 22857c478bd9Sstevel@tonic-gate 22867c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 22877c478bd9Sstevel@tonic-gate if (dodqlock) { 22887c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 22897c478bd9Sstevel@tonic-gate } 22907c478bd9Sstevel@tonic-gate if (dorwlock) 22917c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 22927c478bd9Sstevel@tonic-gate 22937c478bd9Sstevel@tonic-gate if (ulp) { 22947c478bd9Sstevel@tonic-gate if (dotrans) { 22957c478bd9Sstevel@tonic-gate int terr = 0; 22967c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, terr, issync, TOP_SETATTR, 22977c478bd9Sstevel@tonic-gate trans_size); 22987c478bd9Sstevel@tonic-gate if (error == 0) 22997c478bd9Sstevel@tonic-gate error = terr; 23007c478bd9Sstevel@tonic-gate } 23017c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 23027c478bd9Sstevel@tonic-gate } 23037c478bd9Sstevel@tonic-gate out: 23047c478bd9Sstevel@tonic-gate /* 23057c478bd9Sstevel@tonic-gate * If out of inodes or blocks, see if we can free something 23067c478bd9Sstevel@tonic-gate * up from the delete queue. 23077c478bd9Sstevel@tonic-gate */ 23087c478bd9Sstevel@tonic-gate if ((error == ENOSPC) && retry && TRANS_ISTRANS(ufsvfsp)) { 23097c478bd9Sstevel@tonic-gate ufs_delete_drain_wait(ufsvfsp, 1); 23107c478bd9Sstevel@tonic-gate retry = 0; 23117c478bd9Sstevel@tonic-gate if (errmsg1 != NULL) 23127c478bd9Sstevel@tonic-gate kmem_free(errmsg1, len1); 23137c478bd9Sstevel@tonic-gate if (errmsg2 != NULL) 23147c478bd9Sstevel@tonic-gate kmem_free(errmsg2, len2); 23157c478bd9Sstevel@tonic-gate goto again; 23167c478bd9Sstevel@tonic-gate } 23177c478bd9Sstevel@tonic-gate if (errmsg1 != NULL) { 23187c478bd9Sstevel@tonic-gate uprintf(errmsg1); 23197c478bd9Sstevel@tonic-gate kmem_free(errmsg1, len1); 23207c478bd9Sstevel@tonic-gate } 23217c478bd9Sstevel@tonic-gate if (errmsg2 != NULL) { 23227c478bd9Sstevel@tonic-gate uprintf(errmsg2); 23237c478bd9Sstevel@tonic-gate kmem_free(errmsg2, len2); 23247c478bd9Sstevel@tonic-gate } 23257c478bd9Sstevel@tonic-gate return (error); 23267c478bd9Sstevel@tonic-gate } 23277c478bd9Sstevel@tonic-gate 23287c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 23297c478bd9Sstevel@tonic-gate static int 2330da6c28aaSamw ufs_access(struct vnode *vp, int mode, int flags, struct cred *cr, 233180d5689fSPatrick Mooney caller_context_t *ct) 23327c478bd9Sstevel@tonic-gate { 23337c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 23347c478bd9Sstevel@tonic-gate 23357c478bd9Sstevel@tonic-gate if (ip->i_ufsvfs == NULL) 23367c478bd9Sstevel@tonic-gate return (EIO); 23377c478bd9Sstevel@tonic-gate 23387c478bd9Sstevel@tonic-gate /* 23397c478bd9Sstevel@tonic-gate * The ufs_iaccess function wants to be called with 23407c478bd9Sstevel@tonic-gate * mode bits expressed as "ufs specific" bits. 23417c478bd9Sstevel@tonic-gate * I.e., VWRITE|VREAD|VEXEC do not make sense to 23427c478bd9Sstevel@tonic-gate * ufs_iaccess() but IWRITE|IREAD|IEXEC do. 23437c478bd9Sstevel@tonic-gate * But since they're the same we just pass the vnode mode 23447c478bd9Sstevel@tonic-gate * bit but just verify that assumption at compile time. 23457c478bd9Sstevel@tonic-gate */ 23467c478bd9Sstevel@tonic-gate #if IWRITE != VWRITE || IREAD != VREAD || IEXEC != VEXEC 23477c478bd9Sstevel@tonic-gate #error "ufs_access needs to map Vmodes to Imodes" 23487c478bd9Sstevel@tonic-gate #endif 234960c8e821SFrank Batschulat return (ufs_iaccess(ip, mode, cr, 1)); 23507c478bd9Sstevel@tonic-gate } 23517c478bd9Sstevel@tonic-gate 23527c478bd9Sstevel@tonic-gate /* ARGSUSED */ 23537c478bd9Sstevel@tonic-gate static int 2354da6c28aaSamw ufs_readlink(struct vnode *vp, struct uio *uiop, struct cred *cr, 235580d5689fSPatrick Mooney caller_context_t *ct) 23567c478bd9Sstevel@tonic-gate { 23577c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 23587c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 23597c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 23607c478bd9Sstevel@tonic-gate int error; 23617c478bd9Sstevel@tonic-gate int fastsymlink; 23627c478bd9Sstevel@tonic-gate 23637c478bd9Sstevel@tonic-gate if (vp->v_type != VLNK) { 23647c478bd9Sstevel@tonic-gate error = EINVAL; 23657c478bd9Sstevel@tonic-gate goto nolockout; 23667c478bd9Sstevel@tonic-gate } 23677c478bd9Sstevel@tonic-gate 23687c478bd9Sstevel@tonic-gate /* 23697c478bd9Sstevel@tonic-gate * If the symbolic link is empty there is nothing to read. 23707c478bd9Sstevel@tonic-gate * Fast-track these empty symbolic links 23717c478bd9Sstevel@tonic-gate */ 23727c478bd9Sstevel@tonic-gate if (ip->i_size == 0) { 23737c478bd9Sstevel@tonic-gate error = 0; 23747c478bd9Sstevel@tonic-gate goto nolockout; 23757c478bd9Sstevel@tonic-gate } 23767c478bd9Sstevel@tonic-gate 23777c478bd9Sstevel@tonic-gate ufsvfsp = ip->i_ufsvfs; 23787c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_READLINK_MASK); 23797c478bd9Sstevel@tonic-gate if (error) 23807c478bd9Sstevel@tonic-gate goto nolockout; 23817c478bd9Sstevel@tonic-gate /* 23827c478bd9Sstevel@tonic-gate * The ip->i_rwlock protects the data blocks used for FASTSYMLINK 23837c478bd9Sstevel@tonic-gate */ 23847c478bd9Sstevel@tonic-gate again: 23857c478bd9Sstevel@tonic-gate fastsymlink = 0; 23867c478bd9Sstevel@tonic-gate if (ip->i_flag & IFASTSYMLNK) { 23877c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_READER); 23887c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 23897c478bd9Sstevel@tonic-gate if (ip->i_flag & IFASTSYMLNK) { 23907c478bd9Sstevel@tonic-gate if (!ULOCKFS_IS_NOIACC(ITOUL(ip)) && 23917c478bd9Sstevel@tonic-gate (ip->i_fs->fs_ronly == 0) && 23927c478bd9Sstevel@tonic-gate (!ufsvfsp->vfs_noatime)) { 23937c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 23947c478bd9Sstevel@tonic-gate ip->i_flag |= IACC; 23957c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 23967c478bd9Sstevel@tonic-gate } 23977c478bd9Sstevel@tonic-gate error = uiomove((caddr_t)&ip->i_db[1], 239880d34432Sfrankho MIN(ip->i_size, uiop->uio_resid), 239980d34432Sfrankho UIO_READ, uiop); 24007c478bd9Sstevel@tonic-gate ITIMES(ip); 24017c478bd9Sstevel@tonic-gate ++fastsymlink; 24027c478bd9Sstevel@tonic-gate } 24037c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 24047c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 24057c478bd9Sstevel@tonic-gate } 24067c478bd9Sstevel@tonic-gate if (!fastsymlink) { 24077c478bd9Sstevel@tonic-gate ssize_t size; /* number of bytes read */ 24087c478bd9Sstevel@tonic-gate caddr_t basep; /* pointer to input data */ 24097c478bd9Sstevel@tonic-gate ino_t ino; 24107c478bd9Sstevel@tonic-gate long igen; 24117c478bd9Sstevel@tonic-gate struct uio tuio; /* temp uio struct */ 24127c478bd9Sstevel@tonic-gate struct uio *tuiop; 24137c478bd9Sstevel@tonic-gate iovec_t tiov; /* temp iovec struct */ 24147c478bd9Sstevel@tonic-gate char kbuf[FSL_SIZE]; /* buffer to hold fast symlink */ 24157c478bd9Sstevel@tonic-gate int tflag = 0; /* flag to indicate temp vars used */ 24167c478bd9Sstevel@tonic-gate 24177c478bd9Sstevel@tonic-gate ino = ip->i_number; 24187c478bd9Sstevel@tonic-gate igen = ip->i_gen; 24197c478bd9Sstevel@tonic-gate size = uiop->uio_resid; 24207c478bd9Sstevel@tonic-gate basep = uiop->uio_iov->iov_base; 24217c478bd9Sstevel@tonic-gate tuiop = uiop; 24227c478bd9Sstevel@tonic-gate 24237c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_WRITER); 24247c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 24257c478bd9Sstevel@tonic-gate if (ip->i_flag & IFASTSYMLNK) { 24267c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 24277c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 24287c478bd9Sstevel@tonic-gate goto again; 24297c478bd9Sstevel@tonic-gate } 24307c478bd9Sstevel@tonic-gate 24317c478bd9Sstevel@tonic-gate /* can this be a fast symlink and is it a user buffer? */ 24327c478bd9Sstevel@tonic-gate if (ip->i_size <= FSL_SIZE && 24337c478bd9Sstevel@tonic-gate (uiop->uio_segflg == UIO_USERSPACE || 24347c478bd9Sstevel@tonic-gate uiop->uio_segflg == UIO_USERISPACE)) { 24357c478bd9Sstevel@tonic-gate 24367c478bd9Sstevel@tonic-gate bzero(&tuio, sizeof (struct uio)); 24377c478bd9Sstevel@tonic-gate /* 24387c478bd9Sstevel@tonic-gate * setup a kernel buffer to read link into. this 24397c478bd9Sstevel@tonic-gate * is to fix a race condition where the user buffer 24407c478bd9Sstevel@tonic-gate * got corrupted before copying it into the inode. 24417c478bd9Sstevel@tonic-gate */ 24427c478bd9Sstevel@tonic-gate size = ip->i_size; 24437c478bd9Sstevel@tonic-gate tiov.iov_len = size; 24447c478bd9Sstevel@tonic-gate tiov.iov_base = kbuf; 24457c478bd9Sstevel@tonic-gate tuio.uio_iov = &tiov; 24467c478bd9Sstevel@tonic-gate tuio.uio_iovcnt = 1; 24477c478bd9Sstevel@tonic-gate tuio.uio_offset = uiop->uio_offset; 24487c478bd9Sstevel@tonic-gate tuio.uio_segflg = UIO_SYSSPACE; 24497c478bd9Sstevel@tonic-gate tuio.uio_fmode = uiop->uio_fmode; 24507c478bd9Sstevel@tonic-gate tuio.uio_extflg = uiop->uio_extflg; 24517c478bd9Sstevel@tonic-gate tuio.uio_limit = uiop->uio_limit; 24527c478bd9Sstevel@tonic-gate tuio.uio_resid = size; 24537c478bd9Sstevel@tonic-gate 24547c478bd9Sstevel@tonic-gate basep = tuio.uio_iov->iov_base; 24557c478bd9Sstevel@tonic-gate tuiop = &tuio; 24567c478bd9Sstevel@tonic-gate tflag = 1; 24577c478bd9Sstevel@tonic-gate } 24587c478bd9Sstevel@tonic-gate 24597c478bd9Sstevel@tonic-gate error = rdip(ip, tuiop, 0, cr); 24607c478bd9Sstevel@tonic-gate if (!(error == 0 && ip->i_number == ino && ip->i_gen == igen)) { 24617c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 24627c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 24637c478bd9Sstevel@tonic-gate goto out; 24647c478bd9Sstevel@tonic-gate } 24657c478bd9Sstevel@tonic-gate 24667c478bd9Sstevel@tonic-gate if (tflag == 0) 24677c478bd9Sstevel@tonic-gate size -= uiop->uio_resid; 24687c478bd9Sstevel@tonic-gate 24697c478bd9Sstevel@tonic-gate if ((tflag == 0 && ip->i_size <= FSL_SIZE && 24707c478bd9Sstevel@tonic-gate ip->i_size == size) || (tflag == 1 && 24717c478bd9Sstevel@tonic-gate tuio.uio_resid == 0)) { 24727c478bd9Sstevel@tonic-gate error = kcopy(basep, &ip->i_db[1], ip->i_size); 24737c478bd9Sstevel@tonic-gate if (error == 0) { 24747c478bd9Sstevel@tonic-gate ip->i_flag |= IFASTSYMLNK; 24757c478bd9Sstevel@tonic-gate /* 24767c478bd9Sstevel@tonic-gate * free page 24777c478bd9Sstevel@tonic-gate */ 24787c478bd9Sstevel@tonic-gate (void) VOP_PUTPAGE(ITOV(ip), 24797c478bd9Sstevel@tonic-gate (offset_t)0, PAGESIZE, 24807c478bd9Sstevel@tonic-gate (B_DONTNEED | B_FREE | B_FORCE | B_ASYNC), 2481da6c28aaSamw cr, ct); 24827c478bd9Sstevel@tonic-gate } else { 24837c478bd9Sstevel@tonic-gate int i; 24847c478bd9Sstevel@tonic-gate /* error, clear garbage left behind */ 24857c478bd9Sstevel@tonic-gate for (i = 1; i < NDADDR; i++) 24867c478bd9Sstevel@tonic-gate ip->i_db[i] = 0; 24877c478bd9Sstevel@tonic-gate for (i = 0; i < NIADDR; i++) 24887c478bd9Sstevel@tonic-gate ip->i_ib[i] = 0; 24897c478bd9Sstevel@tonic-gate } 24907c478bd9Sstevel@tonic-gate } 24917c478bd9Sstevel@tonic-gate if (tflag == 1) { 24927c478bd9Sstevel@tonic-gate /* now, copy it into the user buffer */ 24937c478bd9Sstevel@tonic-gate error = uiomove((caddr_t)kbuf, 249480d34432Sfrankho MIN(size, uiop->uio_resid), 249580d34432Sfrankho UIO_READ, uiop); 24967c478bd9Sstevel@tonic-gate } 24977c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 24987c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 24997c478bd9Sstevel@tonic-gate } 25007c478bd9Sstevel@tonic-gate out: 25017c478bd9Sstevel@tonic-gate if (ulp) { 25027c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 25037c478bd9Sstevel@tonic-gate } 25047c478bd9Sstevel@tonic-gate nolockout: 25057c478bd9Sstevel@tonic-gate return (error); 25067c478bd9Sstevel@tonic-gate } 25077c478bd9Sstevel@tonic-gate 25087c478bd9Sstevel@tonic-gate /* ARGSUSED */ 25097c478bd9Sstevel@tonic-gate static int 251080d5689fSPatrick Mooney ufs_fsync(struct vnode *vp, int syncflag, struct cred *cr, caller_context_t *ct) 25117c478bd9Sstevel@tonic-gate { 25127c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 25137c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = ip->i_ufsvfs; 25147c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 25157c478bd9Sstevel@tonic-gate int error; 25167c478bd9Sstevel@tonic-gate 25177c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_FSYNC_MASK); 25187c478bd9Sstevel@tonic-gate if (error) 25197c478bd9Sstevel@tonic-gate return (error); 25207c478bd9Sstevel@tonic-gate 25217c478bd9Sstevel@tonic-gate if (TRANS_ISTRANS(ufsvfsp)) { 25227c478bd9Sstevel@tonic-gate /* 25237c478bd9Sstevel@tonic-gate * First push out any data pages 25247c478bd9Sstevel@tonic-gate */ 25257c478bd9Sstevel@tonic-gate if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && 25267c478bd9Sstevel@tonic-gate (vp->v_type != VCHR) && !(IS_SWAPVP(vp))) { 25277c478bd9Sstevel@tonic-gate error = VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, 2528da6c28aaSamw 0, CRED(), ct); 25297c478bd9Sstevel@tonic-gate if (error) 25307c478bd9Sstevel@tonic-gate goto out; 25317c478bd9Sstevel@tonic-gate } 25327c478bd9Sstevel@tonic-gate 25337c478bd9Sstevel@tonic-gate /* 25347c478bd9Sstevel@tonic-gate * Delta any delayed inode times updates 25357c478bd9Sstevel@tonic-gate * and push inode to log. 25367c478bd9Sstevel@tonic-gate * All other inode deltas will have already been delta'd 25377c478bd9Sstevel@tonic-gate * and will be pushed during the commit. 25387c478bd9Sstevel@tonic-gate */ 25397c478bd9Sstevel@tonic-gate if (!(syncflag & FDSYNC) && 25407c478bd9Sstevel@tonic-gate ((ip->i_flag & (IMOD|IMODACC)) == IMODACC)) { 25417c478bd9Sstevel@tonic-gate if (ulp) { 25427c478bd9Sstevel@tonic-gate TRANS_BEGIN_ASYNC(ufsvfsp, TOP_FSYNC, 25437c478bd9Sstevel@tonic-gate TOP_SYNCIP_SIZE); 25447c478bd9Sstevel@tonic-gate } 25457c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 25467c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 25477c478bd9Sstevel@tonic-gate ip->i_flag &= ~IMODTIME; 25487c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 25497c478bd9Sstevel@tonic-gate ufs_iupdat(ip, I_SYNC); 25507c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 25517c478bd9Sstevel@tonic-gate if (ulp) { 25527c478bd9Sstevel@tonic-gate TRANS_END_ASYNC(ufsvfsp, TOP_FSYNC, 25537c478bd9Sstevel@tonic-gate TOP_SYNCIP_SIZE); 25547c478bd9Sstevel@tonic-gate } 25557c478bd9Sstevel@tonic-gate } 25567c478bd9Sstevel@tonic-gate 25577c478bd9Sstevel@tonic-gate /* 25587c478bd9Sstevel@tonic-gate * Commit the Moby transaction 25597c478bd9Sstevel@tonic-gate * 25607c478bd9Sstevel@tonic-gate * Deltas have already been made so we just need to 25617c478bd9Sstevel@tonic-gate * commit them with a synchronous transaction. 25627c478bd9Sstevel@tonic-gate * TRANS_BEGIN_SYNC() will return an error 25637c478bd9Sstevel@tonic-gate * if there are no deltas to commit, for an 25647c478bd9Sstevel@tonic-gate * empty transaction. 25657c478bd9Sstevel@tonic-gate */ 25667c478bd9Sstevel@tonic-gate if (ulp) { 25677c478bd9Sstevel@tonic-gate TRANS_BEGIN_SYNC(ufsvfsp, TOP_FSYNC, TOP_COMMIT_SIZE, 25687c478bd9Sstevel@tonic-gate error); 25697c478bd9Sstevel@tonic-gate if (error) { 25707c478bd9Sstevel@tonic-gate error = 0; /* commit wasn't needed */ 25717c478bd9Sstevel@tonic-gate goto out; 25727c478bd9Sstevel@tonic-gate } 25737c478bd9Sstevel@tonic-gate TRANS_END_SYNC(ufsvfsp, error, TOP_FSYNC, 25747c478bd9Sstevel@tonic-gate TOP_COMMIT_SIZE); 25757c478bd9Sstevel@tonic-gate } 25767c478bd9Sstevel@tonic-gate } else { /* not logging */ 25777c478bd9Sstevel@tonic-gate if (!(IS_SWAPVP(vp))) 25787c478bd9Sstevel@tonic-gate if (syncflag & FNODSYNC) { 25797c478bd9Sstevel@tonic-gate /* Just update the inode only */ 25807c478bd9Sstevel@tonic-gate TRANS_IUPDAT(ip, 1); 25817c478bd9Sstevel@tonic-gate error = 0; 25827c478bd9Sstevel@tonic-gate } else if (syncflag & FDSYNC) 25837c478bd9Sstevel@tonic-gate /* Do data-synchronous writes */ 25847c478bd9Sstevel@tonic-gate error = TRANS_SYNCIP(ip, 0, I_DSYNC, TOP_FSYNC); 25857c478bd9Sstevel@tonic-gate else 25867c478bd9Sstevel@tonic-gate /* Do synchronous writes */ 25877c478bd9Sstevel@tonic-gate error = TRANS_SYNCIP(ip, 0, I_SYNC, TOP_FSYNC); 25887c478bd9Sstevel@tonic-gate 25897c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 25907c478bd9Sstevel@tonic-gate if (!error) 25917c478bd9Sstevel@tonic-gate error = ufs_sync_indir(ip); 25927c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 25937c478bd9Sstevel@tonic-gate } 25947c478bd9Sstevel@tonic-gate out: 25957c478bd9Sstevel@tonic-gate if (ulp) { 25967c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 25977c478bd9Sstevel@tonic-gate } 25987c478bd9Sstevel@tonic-gate return (error); 25997c478bd9Sstevel@tonic-gate } 26007c478bd9Sstevel@tonic-gate 26017c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 26027c478bd9Sstevel@tonic-gate static void 2603da6c28aaSamw ufs_inactive(struct vnode *vp, struct cred *cr, caller_context_t *ct) 26047c478bd9Sstevel@tonic-gate { 26057c478bd9Sstevel@tonic-gate ufs_iinactive(VTOI(vp)); 26067c478bd9Sstevel@tonic-gate } 26077c478bd9Sstevel@tonic-gate 26087c478bd9Sstevel@tonic-gate /* 26097c478bd9Sstevel@tonic-gate * Unix file system operations having to do with directory manipulation. 26107c478bd9Sstevel@tonic-gate */ 26117c478bd9Sstevel@tonic-gate int ufs_lookup_idle_count = 2; /* Number of inodes to idle each time */ 26127c478bd9Sstevel@tonic-gate /* ARGSUSED */ 26137c478bd9Sstevel@tonic-gate static int 26147c478bd9Sstevel@tonic-gate ufs_lookup(struct vnode *dvp, char *nm, struct vnode **vpp, 261580d5689fSPatrick Mooney struct pathname *pnp, int flags, struct vnode *rdir, struct cred *cr, 261680d5689fSPatrick Mooney caller_context_t *ct, int *direntflags, pathname_t *realpnp) 26177c478bd9Sstevel@tonic-gate { 26187c478bd9Sstevel@tonic-gate struct inode *ip; 26197c478bd9Sstevel@tonic-gate struct inode *sip; 26207c478bd9Sstevel@tonic-gate struct inode *xip; 26217c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 26227c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 26237c478bd9Sstevel@tonic-gate struct vnode *vp; 26247c478bd9Sstevel@tonic-gate int error; 26257c478bd9Sstevel@tonic-gate 26267c478bd9Sstevel@tonic-gate /* 26277c478bd9Sstevel@tonic-gate * Check flags for type of lookup (regular file or attribute file) 26287c478bd9Sstevel@tonic-gate */ 26297c478bd9Sstevel@tonic-gate 26307c478bd9Sstevel@tonic-gate ip = VTOI(dvp); 26317c478bd9Sstevel@tonic-gate 26327c478bd9Sstevel@tonic-gate if (flags & LOOKUP_XATTR) { 26337c478bd9Sstevel@tonic-gate 2634da6c28aaSamw /* 2635da6c28aaSamw * If not mounted with XATTR support then return EINVAL 2636da6c28aaSamw */ 2637da6c28aaSamw 2638da6c28aaSamw if (!(ip->i_ufsvfs->vfs_vfs->vfs_flag & VFS_XATTR)) 2639da6c28aaSamw return (EINVAL); 26407c478bd9Sstevel@tonic-gate /* 26417c478bd9Sstevel@tonic-gate * We don't allow recursive attributes... 26427c478bd9Sstevel@tonic-gate * Maybe someday we will. 26437c478bd9Sstevel@tonic-gate */ 26447c478bd9Sstevel@tonic-gate if ((ip->i_cflags & IXATTR)) { 26457c478bd9Sstevel@tonic-gate return (EINVAL); 26467c478bd9Sstevel@tonic-gate } 26477c478bd9Sstevel@tonic-gate 26487c478bd9Sstevel@tonic-gate if ((vp = dnlc_lookup(dvp, XATTR_DIR_NAME)) == NULL) { 26497c478bd9Sstevel@tonic-gate error = ufs_xattr_getattrdir(dvp, &sip, flags, cr); 26507c478bd9Sstevel@tonic-gate if (error) { 26517c478bd9Sstevel@tonic-gate *vpp = NULL; 26527c478bd9Sstevel@tonic-gate goto out; 26537c478bd9Sstevel@tonic-gate } 26547c478bd9Sstevel@tonic-gate 26557c478bd9Sstevel@tonic-gate vp = ITOV(sip); 26567c478bd9Sstevel@tonic-gate dnlc_update(dvp, XATTR_DIR_NAME, vp); 26577c478bd9Sstevel@tonic-gate } 26587c478bd9Sstevel@tonic-gate 26597c478bd9Sstevel@tonic-gate /* 26607c478bd9Sstevel@tonic-gate * Check accessibility of directory. 26617c478bd9Sstevel@tonic-gate */ 26627c478bd9Sstevel@tonic-gate if (vp == DNLC_NO_VNODE) { 26637c478bd9Sstevel@tonic-gate VN_RELE(vp); 26647c478bd9Sstevel@tonic-gate error = ENOENT; 26657c478bd9Sstevel@tonic-gate goto out; 26667c478bd9Sstevel@tonic-gate } 266760c8e821SFrank Batschulat if ((error = ufs_iaccess(VTOI(vp), IEXEC, cr, 1)) != 0) { 26687c478bd9Sstevel@tonic-gate VN_RELE(vp); 26697c478bd9Sstevel@tonic-gate goto out; 26707c478bd9Sstevel@tonic-gate } 26717c478bd9Sstevel@tonic-gate 26727c478bd9Sstevel@tonic-gate *vpp = vp; 26737c478bd9Sstevel@tonic-gate return (0); 26747c478bd9Sstevel@tonic-gate } 26757c478bd9Sstevel@tonic-gate 26767c478bd9Sstevel@tonic-gate /* 26777c478bd9Sstevel@tonic-gate * Check for a null component, which we should treat as 26787c478bd9Sstevel@tonic-gate * looking at dvp from within it's parent, so we don't 26797c478bd9Sstevel@tonic-gate * need a call to ufs_iaccess(), as it has already been 26807c478bd9Sstevel@tonic-gate * done. 26817c478bd9Sstevel@tonic-gate */ 26827c478bd9Sstevel@tonic-gate if (nm[0] == 0) { 26837c478bd9Sstevel@tonic-gate VN_HOLD(dvp); 26847c478bd9Sstevel@tonic-gate error = 0; 26857c478bd9Sstevel@tonic-gate *vpp = dvp; 26867c478bd9Sstevel@tonic-gate goto out; 26877c478bd9Sstevel@tonic-gate } 26887c478bd9Sstevel@tonic-gate 26897c478bd9Sstevel@tonic-gate /* 26907c478bd9Sstevel@tonic-gate * Check for "." ie itself. this is a quick check and 26917c478bd9Sstevel@tonic-gate * avoids adding "." into the dnlc (which have been seen 26927c478bd9Sstevel@tonic-gate * to occupy >10% of the cache). 26937c478bd9Sstevel@tonic-gate */ 26947c478bd9Sstevel@tonic-gate if ((nm[0] == '.') && (nm[1] == 0)) { 26957c478bd9Sstevel@tonic-gate /* 26967c478bd9Sstevel@tonic-gate * Don't return without checking accessibility 26977c478bd9Sstevel@tonic-gate * of the directory. We only need the lock if 26987c478bd9Sstevel@tonic-gate * we are going to return it. 26997c478bd9Sstevel@tonic-gate */ 270060c8e821SFrank Batschulat if ((error = ufs_iaccess(ip, IEXEC, cr, 1)) == 0) { 27017c478bd9Sstevel@tonic-gate VN_HOLD(dvp); 27027c478bd9Sstevel@tonic-gate *vpp = dvp; 27037c478bd9Sstevel@tonic-gate } 27047c478bd9Sstevel@tonic-gate goto out; 27057c478bd9Sstevel@tonic-gate } 27067c478bd9Sstevel@tonic-gate 27077c478bd9Sstevel@tonic-gate /* 27087c478bd9Sstevel@tonic-gate * Fast path: Check the directory name lookup cache. 27097c478bd9Sstevel@tonic-gate */ 27107c478bd9Sstevel@tonic-gate if (vp = dnlc_lookup(dvp, nm)) { 27117c478bd9Sstevel@tonic-gate /* 27127c478bd9Sstevel@tonic-gate * Check accessibility of directory. 27137c478bd9Sstevel@tonic-gate */ 271460c8e821SFrank Batschulat if ((error = ufs_iaccess(ip, IEXEC, cr, 1)) != 0) { 27157c478bd9Sstevel@tonic-gate VN_RELE(vp); 27167c478bd9Sstevel@tonic-gate goto out; 27177c478bd9Sstevel@tonic-gate } 27187c478bd9Sstevel@tonic-gate if (vp == DNLC_NO_VNODE) { 27197c478bd9Sstevel@tonic-gate VN_RELE(vp); 27207c478bd9Sstevel@tonic-gate error = ENOENT; 27217c478bd9Sstevel@tonic-gate goto out; 27227c478bd9Sstevel@tonic-gate } 27237c478bd9Sstevel@tonic-gate xip = VTOI(vp); 27247c478bd9Sstevel@tonic-gate ulp = NULL; 27257c478bd9Sstevel@tonic-gate goto fastpath; 27267c478bd9Sstevel@tonic-gate } 27277c478bd9Sstevel@tonic-gate 27287c478bd9Sstevel@tonic-gate /* 27297c478bd9Sstevel@tonic-gate * Keep the idle queue from getting too long by 27307c478bd9Sstevel@tonic-gate * idling two inodes before attempting to allocate another. 27317c478bd9Sstevel@tonic-gate * This operation must be performed before entering 27327c478bd9Sstevel@tonic-gate * lockfs or a transaction. 27337c478bd9Sstevel@tonic-gate */ 27347c478bd9Sstevel@tonic-gate if (ufs_idle_q.uq_ne > ufs_idle_q.uq_hiwat) 27357c478bd9Sstevel@tonic-gate if ((curthread->t_flag & T_DONTBLOCK) == 0) { 27367c478bd9Sstevel@tonic-gate ins.in_lidles.value.ul += ufs_lookup_idle_count; 27377c478bd9Sstevel@tonic-gate ufs_idle_some(ufs_lookup_idle_count); 27387c478bd9Sstevel@tonic-gate } 27397c478bd9Sstevel@tonic-gate 274002ff05a9Svsakar retry_lookup: 274160c8e821SFrank Batschulat /* 274260c8e821SFrank Batschulat * Check accessibility of directory. 274360c8e821SFrank Batschulat */ 274460c8e821SFrank Batschulat if (error = ufs_diraccess(ip, IEXEC, cr)) 274560c8e821SFrank Batschulat goto out; 274660c8e821SFrank Batschulat 27477c478bd9Sstevel@tonic-gate ufsvfsp = ip->i_ufsvfs; 27487c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_LOOKUP_MASK); 27497c478bd9Sstevel@tonic-gate if (error) 27507c478bd9Sstevel@tonic-gate goto out; 27517c478bd9Sstevel@tonic-gate 27529b5097eeSOwen Roberts error = ufs_dirlook(ip, nm, &xip, cr, 1, 0); 27537c478bd9Sstevel@tonic-gate 27547c478bd9Sstevel@tonic-gate fastpath: 27557c478bd9Sstevel@tonic-gate if (error == 0) { 27567c478bd9Sstevel@tonic-gate ip = xip; 27577c478bd9Sstevel@tonic-gate *vpp = ITOV(ip); 27587c478bd9Sstevel@tonic-gate 27597c478bd9Sstevel@tonic-gate /* 27607c478bd9Sstevel@tonic-gate * If vnode is a device return special vnode instead. 27617c478bd9Sstevel@tonic-gate */ 27627c478bd9Sstevel@tonic-gate if (IS_DEVVP(*vpp)) { 27637c478bd9Sstevel@tonic-gate struct vnode *newvp; 27647c478bd9Sstevel@tonic-gate 27657c478bd9Sstevel@tonic-gate newvp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, 27667c478bd9Sstevel@tonic-gate cr); 27677c478bd9Sstevel@tonic-gate VN_RELE(*vpp); 27687c478bd9Sstevel@tonic-gate if (newvp == NULL) 27697c478bd9Sstevel@tonic-gate error = ENOSYS; 27707c478bd9Sstevel@tonic-gate else 27717c478bd9Sstevel@tonic-gate *vpp = newvp; 2772986fd29aSsetje } else if (ip->i_cflags & ICOMPRESS) { 2773986fd29aSsetje struct vnode *newvp; 2774986fd29aSsetje 2775986fd29aSsetje /* 2776986fd29aSsetje * Compressed file, substitute dcfs vnode 2777986fd29aSsetje */ 2778986fd29aSsetje newvp = decompvp(*vpp, cr, ct); 2779986fd29aSsetje VN_RELE(*vpp); 2780986fd29aSsetje if (newvp == NULL) 2781986fd29aSsetje error = ENOSYS; 2782986fd29aSsetje else 2783986fd29aSsetje *vpp = newvp; 27847c478bd9Sstevel@tonic-gate } 27857c478bd9Sstevel@tonic-gate } 27867c478bd9Sstevel@tonic-gate if (ulp) { 27877c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 27887c478bd9Sstevel@tonic-gate } 27897c478bd9Sstevel@tonic-gate 279002ff05a9Svsakar if (error == EAGAIN) 279102ff05a9Svsakar goto retry_lookup; 279202ff05a9Svsakar 27937c478bd9Sstevel@tonic-gate out: 27947c478bd9Sstevel@tonic-gate return (error); 27957c478bd9Sstevel@tonic-gate } 27967c478bd9Sstevel@tonic-gate 2797da6c28aaSamw /*ARGSUSED*/ 27987c478bd9Sstevel@tonic-gate static int 27997c478bd9Sstevel@tonic-gate ufs_create(struct vnode *dvp, char *name, struct vattr *vap, enum vcexcl excl, 280080d5689fSPatrick Mooney int mode, struct vnode **vpp, struct cred *cr, int flag, 280180d5689fSPatrick Mooney caller_context_t *ct, vsecattr_t *vsecp) 28027c478bd9Sstevel@tonic-gate { 28037c478bd9Sstevel@tonic-gate struct inode *ip; 28047c478bd9Sstevel@tonic-gate struct inode *xip; 28057c478bd9Sstevel@tonic-gate struct inode *dip; 28067c478bd9Sstevel@tonic-gate struct vnode *xvp; 28077c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 28087c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 28097c478bd9Sstevel@tonic-gate int error; 28107c478bd9Sstevel@tonic-gate int issync; 28117c478bd9Sstevel@tonic-gate int truncflag; 28127c478bd9Sstevel@tonic-gate int trans_size; 28137c478bd9Sstevel@tonic-gate int noentry; 28147c478bd9Sstevel@tonic-gate int defer_dip_seq_update = 0; /* need to defer update of dip->i_seq */ 28157c478bd9Sstevel@tonic-gate int retry = 1; 281602ff05a9Svsakar int indeadlock; 28177c478bd9Sstevel@tonic-gate 28187c478bd9Sstevel@tonic-gate again: 28197c478bd9Sstevel@tonic-gate ip = VTOI(dvp); 28207c478bd9Sstevel@tonic-gate ufsvfsp = ip->i_ufsvfs; 28217c478bd9Sstevel@tonic-gate truncflag = 0; 28227c478bd9Sstevel@tonic-gate 28237c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_CREATE_MASK); 28247c478bd9Sstevel@tonic-gate if (error) 28257c478bd9Sstevel@tonic-gate goto out; 28267c478bd9Sstevel@tonic-gate 28277c478bd9Sstevel@tonic-gate if (ulp) { 28287c478bd9Sstevel@tonic-gate trans_size = (int)TOP_CREATE_SIZE(ip); 28297c478bd9Sstevel@tonic-gate TRANS_BEGIN_CSYNC(ufsvfsp, issync, TOP_CREATE, trans_size); 28307c478bd9Sstevel@tonic-gate } 28317c478bd9Sstevel@tonic-gate 28327c478bd9Sstevel@tonic-gate if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr) != 0) 28337c478bd9Sstevel@tonic-gate vap->va_mode &= ~VSVTX; 28347c478bd9Sstevel@tonic-gate 28357c478bd9Sstevel@tonic-gate if (*name == '\0') { 28367c478bd9Sstevel@tonic-gate /* 28377c478bd9Sstevel@tonic-gate * Null component name refers to the directory itself. 28387c478bd9Sstevel@tonic-gate */ 28397c478bd9Sstevel@tonic-gate VN_HOLD(dvp); 28407c478bd9Sstevel@tonic-gate /* 28417c478bd9Sstevel@tonic-gate * Even though this is an error case, we need to grab the 28427c478bd9Sstevel@tonic-gate * quota lock since the error handling code below is common. 28437c478bd9Sstevel@tonic-gate */ 28447c478bd9Sstevel@tonic-gate rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 28457c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 28467c478bd9Sstevel@tonic-gate error = EEXIST; 28477c478bd9Sstevel@tonic-gate } else { 28487c478bd9Sstevel@tonic-gate xip = NULL; 28497c478bd9Sstevel@tonic-gate noentry = 0; 285002ff05a9Svsakar /* 285102ff05a9Svsakar * ufs_tryirwlock_trans uses rw_tryenter and checks for SLOCK 285202ff05a9Svsakar * to avoid i_rwlock, ufs_lockfs_begin deadlock. If deadlock 285302ff05a9Svsakar * possible, retries the operation. 285402ff05a9Svsakar */ 285502ff05a9Svsakar ufs_tryirwlock_trans(&ip->i_rwlock, RW_WRITER, TOP_CREATE, 285680d34432Sfrankho retry_dir); 285702ff05a9Svsakar if (indeadlock) 285802ff05a9Svsakar goto again; 285902ff05a9Svsakar 28607c478bd9Sstevel@tonic-gate xvp = dnlc_lookup(dvp, name); 28617c478bd9Sstevel@tonic-gate if (xvp == DNLC_NO_VNODE) { 28627c478bd9Sstevel@tonic-gate noentry = 1; 28637c478bd9Sstevel@tonic-gate VN_RELE(xvp); 28647c478bd9Sstevel@tonic-gate xvp = NULL; 28657c478bd9Sstevel@tonic-gate } 28667c478bd9Sstevel@tonic-gate if (xvp) { 28677c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 286860c8e821SFrank Batschulat if (error = ufs_iaccess(ip, IEXEC, cr, 1)) { 28697c478bd9Sstevel@tonic-gate VN_RELE(xvp); 28707c478bd9Sstevel@tonic-gate } else { 28717c478bd9Sstevel@tonic-gate error = EEXIST; 28727c478bd9Sstevel@tonic-gate xip = VTOI(xvp); 28737c478bd9Sstevel@tonic-gate } 28747c478bd9Sstevel@tonic-gate } else { 28757c478bd9Sstevel@tonic-gate /* 28767c478bd9Sstevel@tonic-gate * Suppress file system full message if we will retry 28777c478bd9Sstevel@tonic-gate */ 28787c478bd9Sstevel@tonic-gate error = ufs_direnter_cm(ip, name, DE_CREATE, 287980d34432Sfrankho vap, &xip, cr, (noentry | (retry ? IQUIET : 0))); 288002ff05a9Svsakar if (error == EAGAIN) { 288102ff05a9Svsakar if (ulp) { 288202ff05a9Svsakar TRANS_END_CSYNC(ufsvfsp, error, issync, 288380d34432Sfrankho TOP_CREATE, trans_size); 288402ff05a9Svsakar ufs_lockfs_end(ulp); 288502ff05a9Svsakar } 288602ff05a9Svsakar goto again; 288702ff05a9Svsakar } 28887c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 28897c478bd9Sstevel@tonic-gate } 28907c478bd9Sstevel@tonic-gate ip = xip; 28917c478bd9Sstevel@tonic-gate if (ip != NULL) { 28927c478bd9Sstevel@tonic-gate rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 28937c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 28947c478bd9Sstevel@tonic-gate } 28957c478bd9Sstevel@tonic-gate } 28967c478bd9Sstevel@tonic-gate 28977c478bd9Sstevel@tonic-gate /* 28987c478bd9Sstevel@tonic-gate * If the file already exists and this is a non-exclusive create, 28997c478bd9Sstevel@tonic-gate * check permissions and allow access for non-directories. 29007c478bd9Sstevel@tonic-gate * Read-only create of an existing directory is also allowed. 29017c478bd9Sstevel@tonic-gate * We fail an exclusive create of anything which already exists. 29027c478bd9Sstevel@tonic-gate */ 29037c478bd9Sstevel@tonic-gate if (error == EEXIST) { 29047c478bd9Sstevel@tonic-gate dip = VTOI(dvp); 29057c478bd9Sstevel@tonic-gate if (excl == NONEXCL) { 29067c478bd9Sstevel@tonic-gate if ((((ip->i_mode & IFMT) == IFDIR) || 29077c478bd9Sstevel@tonic-gate ((ip->i_mode & IFMT) == IFATTRDIR)) && 29087c478bd9Sstevel@tonic-gate (mode & IWRITE)) 29097c478bd9Sstevel@tonic-gate error = EISDIR; 29107c478bd9Sstevel@tonic-gate else if (mode) 291160c8e821SFrank Batschulat error = ufs_iaccess(ip, mode, cr, 0); 29127c478bd9Sstevel@tonic-gate else 29137c478bd9Sstevel@tonic-gate error = 0; 29147c478bd9Sstevel@tonic-gate } 29157c478bd9Sstevel@tonic-gate if (error) { 29167c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 29177c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 29187c478bd9Sstevel@tonic-gate VN_RELE(ITOV(ip)); 29197c478bd9Sstevel@tonic-gate goto unlock; 29207c478bd9Sstevel@tonic-gate } 29217c478bd9Sstevel@tonic-gate /* 29227c478bd9Sstevel@tonic-gate * If the error EEXIST was set, then i_seq can not 29237c478bd9Sstevel@tonic-gate * have been updated. The sequence number interface 29247c478bd9Sstevel@tonic-gate * is defined such that a non-error VOP_CREATE must 29257c478bd9Sstevel@tonic-gate * increase the dir va_seq it by at least one. If we 29267c478bd9Sstevel@tonic-gate * have cleared the error, increase i_seq. Note that 29277c478bd9Sstevel@tonic-gate * we are increasing the dir i_seq and in rare cases 29287c478bd9Sstevel@tonic-gate * ip may actually be from the dvp, so we already have 29297c478bd9Sstevel@tonic-gate * the locks and it will not be subject to truncation. 29307c478bd9Sstevel@tonic-gate * In case we have to update i_seq of the parent 29317c478bd9Sstevel@tonic-gate * directory dip, we have to defer it till we have 29327c478bd9Sstevel@tonic-gate * released our locks on ip due to lock ordering requirements. 29337c478bd9Sstevel@tonic-gate */ 29347c478bd9Sstevel@tonic-gate if (ip != dip) 29357c478bd9Sstevel@tonic-gate defer_dip_seq_update = 1; 29367c478bd9Sstevel@tonic-gate else 29377c478bd9Sstevel@tonic-gate ip->i_seq++; 29387c478bd9Sstevel@tonic-gate 29397c478bd9Sstevel@tonic-gate if (((ip->i_mode & IFMT) == IFREG) && 29407c478bd9Sstevel@tonic-gate (vap->va_mask & AT_SIZE) && vap->va_size == 0) { 29417c478bd9Sstevel@tonic-gate /* 29427c478bd9Sstevel@tonic-gate * Truncate regular files, if requested by caller. 29437c478bd9Sstevel@tonic-gate * Grab i_rwlock to make sure no one else is 29447c478bd9Sstevel@tonic-gate * currently writing to the file (we promised 29457c478bd9Sstevel@tonic-gate * bmap we would do this). 29467c478bd9Sstevel@tonic-gate * Must get the locks in the correct order. 29477c478bd9Sstevel@tonic-gate */ 29487c478bd9Sstevel@tonic-gate if (ip->i_size == 0) { 29497c478bd9Sstevel@tonic-gate ip->i_flag |= ICHG | IUPD; 29507c478bd9Sstevel@tonic-gate ip->i_seq++; 29517c478bd9Sstevel@tonic-gate TRANS_INODE(ufsvfsp, ip); 29527c478bd9Sstevel@tonic-gate } else { 29537c478bd9Sstevel@tonic-gate /* 29547c478bd9Sstevel@tonic-gate * Large Files: Why this check here? 29557c478bd9Sstevel@tonic-gate * Though we do it in vn_create() we really 29567c478bd9Sstevel@tonic-gate * want to guarantee that we do not destroy 29577c478bd9Sstevel@tonic-gate * Large file data by atomically checking 29587c478bd9Sstevel@tonic-gate * the size while holding the contents 29597c478bd9Sstevel@tonic-gate * lock. 29607c478bd9Sstevel@tonic-gate */ 29617c478bd9Sstevel@tonic-gate if (flag && !(flag & FOFFMAX) && 29627c478bd9Sstevel@tonic-gate ((ip->i_mode & IFMT) == IFREG) && 29637c478bd9Sstevel@tonic-gate (ip->i_size > (offset_t)MAXOFF32_T)) { 29647c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 29657c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 29667c478bd9Sstevel@tonic-gate error = EOVERFLOW; 29677c478bd9Sstevel@tonic-gate goto unlock; 29687c478bd9Sstevel@tonic-gate } 29697c478bd9Sstevel@tonic-gate if (TRANS_ISTRANS(ufsvfsp)) 29707c478bd9Sstevel@tonic-gate truncflag++; 29717c478bd9Sstevel@tonic-gate else { 29727c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 29737c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 297402ff05a9Svsakar ufs_tryirwlock_trans(&ip->i_rwlock, 297580d34432Sfrankho RW_WRITER, TOP_CREATE, 297680d34432Sfrankho retry_file); 297702ff05a9Svsakar if (indeadlock) { 297802ff05a9Svsakar VN_RELE(ITOV(ip)); 297902ff05a9Svsakar goto again; 298002ff05a9Svsakar } 29817c478bd9Sstevel@tonic-gate rw_enter(&ufsvfsp->vfs_dqrwlock, 298280d34432Sfrankho RW_READER); 29837c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 29847c478bd9Sstevel@tonic-gate (void) ufs_itrunc(ip, (u_offset_t)0, 0, 298580d34432Sfrankho cr); 29867c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 29877c478bd9Sstevel@tonic-gate } 2988df2381bfSpraks 2989df2381bfSpraks } 2990df2381bfSpraks if (error == 0) { 2991da6c28aaSamw vnevent_create(ITOV(ip), ct); 29927c478bd9Sstevel@tonic-gate } 29937c478bd9Sstevel@tonic-gate } 29947c478bd9Sstevel@tonic-gate } 29957c478bd9Sstevel@tonic-gate 29967c478bd9Sstevel@tonic-gate if (error) { 29977c478bd9Sstevel@tonic-gate if (ip != NULL) { 29987c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 29997c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 30007c478bd9Sstevel@tonic-gate } 30017c478bd9Sstevel@tonic-gate goto unlock; 30027c478bd9Sstevel@tonic-gate } 30037c478bd9Sstevel@tonic-gate 30047c478bd9Sstevel@tonic-gate *vpp = ITOV(ip); 30057c478bd9Sstevel@tonic-gate ITIMES(ip); 30067c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 30077c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 30087c478bd9Sstevel@tonic-gate 30097c478bd9Sstevel@tonic-gate /* 30107c478bd9Sstevel@tonic-gate * If vnode is a device return special vnode instead. 30117c478bd9Sstevel@tonic-gate */ 30127c478bd9Sstevel@tonic-gate if (!error && IS_DEVVP(*vpp)) { 30137c478bd9Sstevel@tonic-gate struct vnode *newvp; 30147c478bd9Sstevel@tonic-gate 30157c478bd9Sstevel@tonic-gate newvp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 30167c478bd9Sstevel@tonic-gate VN_RELE(*vpp); 30177c478bd9Sstevel@tonic-gate if (newvp == NULL) { 30187c478bd9Sstevel@tonic-gate error = ENOSYS; 30197c478bd9Sstevel@tonic-gate goto unlock; 30207c478bd9Sstevel@tonic-gate } 30217c478bd9Sstevel@tonic-gate truncflag = 0; 30227c478bd9Sstevel@tonic-gate *vpp = newvp; 30237c478bd9Sstevel@tonic-gate } 30247c478bd9Sstevel@tonic-gate unlock: 30257c478bd9Sstevel@tonic-gate 30267c478bd9Sstevel@tonic-gate /* 30277c478bd9Sstevel@tonic-gate * Do the deferred update of the parent directory's sequence 30287c478bd9Sstevel@tonic-gate * number now. 30297c478bd9Sstevel@tonic-gate */ 30307c478bd9Sstevel@tonic-gate if (defer_dip_seq_update == 1) { 30317c478bd9Sstevel@tonic-gate rw_enter(&dip->i_contents, RW_READER); 30327c478bd9Sstevel@tonic-gate mutex_enter(&dip->i_tlock); 30337c478bd9Sstevel@tonic-gate dip->i_seq++; 30347c478bd9Sstevel@tonic-gate mutex_exit(&dip->i_tlock); 30357c478bd9Sstevel@tonic-gate rw_exit(&dip->i_contents); 30367c478bd9Sstevel@tonic-gate } 30377c478bd9Sstevel@tonic-gate 30387c478bd9Sstevel@tonic-gate if (ulp) { 30397c478bd9Sstevel@tonic-gate int terr = 0; 30407c478bd9Sstevel@tonic-gate 30417c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, terr, issync, TOP_CREATE, 30427c478bd9Sstevel@tonic-gate trans_size); 30437c478bd9Sstevel@tonic-gate 30447c478bd9Sstevel@tonic-gate /* 30457c478bd9Sstevel@tonic-gate * If we haven't had a more interesting failure 30467c478bd9Sstevel@tonic-gate * already, then anything that might've happened 30477c478bd9Sstevel@tonic-gate * here should be reported. 30487c478bd9Sstevel@tonic-gate */ 30497c478bd9Sstevel@tonic-gate if (error == 0) 30507c478bd9Sstevel@tonic-gate error = terr; 30517c478bd9Sstevel@tonic-gate } 30527c478bd9Sstevel@tonic-gate 30537c478bd9Sstevel@tonic-gate if (!error && truncflag) { 305402ff05a9Svsakar ufs_tryirwlock(&ip->i_rwlock, RW_WRITER, retry_trunc); 305502ff05a9Svsakar if (indeadlock) { 305602ff05a9Svsakar if (ulp) 305702ff05a9Svsakar ufs_lockfs_end(ulp); 305802ff05a9Svsakar VN_RELE(ITOV(ip)); 305902ff05a9Svsakar goto again; 306002ff05a9Svsakar } 30617c478bd9Sstevel@tonic-gate (void) TRANS_ITRUNC(ip, (u_offset_t)0, 0, cr); 30627c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 30637c478bd9Sstevel@tonic-gate } 30647c478bd9Sstevel@tonic-gate 30657c478bd9Sstevel@tonic-gate if (ulp) 30667c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 30677c478bd9Sstevel@tonic-gate 30687c478bd9Sstevel@tonic-gate /* 30697c478bd9Sstevel@tonic-gate * If no inodes available, try to free one up out of the 30707c478bd9Sstevel@tonic-gate * pending delete queue. 30717c478bd9Sstevel@tonic-gate */ 30727c478bd9Sstevel@tonic-gate if ((error == ENOSPC) && retry && TRANS_ISTRANS(ufsvfsp)) { 30737c478bd9Sstevel@tonic-gate ufs_delete_drain_wait(ufsvfsp, 1); 30747c478bd9Sstevel@tonic-gate retry = 0; 30757c478bd9Sstevel@tonic-gate goto again; 30767c478bd9Sstevel@tonic-gate } 30777c478bd9Sstevel@tonic-gate 30787c478bd9Sstevel@tonic-gate out: 30797c478bd9Sstevel@tonic-gate return (error); 30807c478bd9Sstevel@tonic-gate } 30817c478bd9Sstevel@tonic-gate 30827c478bd9Sstevel@tonic-gate extern int ufs_idle_max; 30837c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 30847c478bd9Sstevel@tonic-gate static int 308580d5689fSPatrick Mooney ufs_remove(struct vnode *vp, char *nm, struct cred *cr, caller_context_t *ct, 308680d5689fSPatrick Mooney int flags) 30877c478bd9Sstevel@tonic-gate { 30887c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 30897c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = ip->i_ufsvfs; 30907c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 30917c478bd9Sstevel@tonic-gate vnode_t *rmvp = NULL; /* Vnode corresponding to name being removed */ 309202ff05a9Svsakar int indeadlock; 30937c478bd9Sstevel@tonic-gate int error; 30947c478bd9Sstevel@tonic-gate int issync; 30957c478bd9Sstevel@tonic-gate int trans_size; 30967c478bd9Sstevel@tonic-gate 30977c478bd9Sstevel@tonic-gate /* 30987c478bd9Sstevel@tonic-gate * don't let the delete queue get too long 30997c478bd9Sstevel@tonic-gate */ 31007c478bd9Sstevel@tonic-gate if (ufsvfsp == NULL) { 31017c478bd9Sstevel@tonic-gate error = EIO; 31027c478bd9Sstevel@tonic-gate goto out; 31037c478bd9Sstevel@tonic-gate } 31047c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_delete.uq_ne > ufs_idle_max) 31057c478bd9Sstevel@tonic-gate ufs_delete_drain(vp->v_vfsp, 1, 1); 31067c478bd9Sstevel@tonic-gate 31079b5097eeSOwen Roberts error = ufs_eventlookup(vp, nm, cr, &rmvp); 31089b5097eeSOwen Roberts if (rmvp != NULL) { 31099b5097eeSOwen Roberts /* Only send the event if there were no errors */ 31109b5097eeSOwen Roberts if (error == 0) 31119b5097eeSOwen Roberts vnevent_remove(rmvp, vp, nm, ct); 31129b5097eeSOwen Roberts VN_RELE(rmvp); 31139b5097eeSOwen Roberts } 31149b5097eeSOwen Roberts 311502ff05a9Svsakar retry_remove: 31167c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_REMOVE_MASK); 31177c478bd9Sstevel@tonic-gate if (error) 31187c478bd9Sstevel@tonic-gate goto out; 31197c478bd9Sstevel@tonic-gate 31207c478bd9Sstevel@tonic-gate if (ulp) 31217c478bd9Sstevel@tonic-gate TRANS_BEGIN_CSYNC(ufsvfsp, issync, TOP_REMOVE, 31227c478bd9Sstevel@tonic-gate trans_size = (int)TOP_REMOVE_SIZE(VTOI(vp))); 31237c478bd9Sstevel@tonic-gate 312402ff05a9Svsakar /* 312502ff05a9Svsakar * ufs_tryirwlock_trans uses rw_tryenter and checks for SLOCK 312602ff05a9Svsakar * to avoid i_rwlock, ufs_lockfs_begin deadlock. If deadlock 312702ff05a9Svsakar * possible, retries the operation. 312802ff05a9Svsakar */ 312902ff05a9Svsakar ufs_tryirwlock_trans(&ip->i_rwlock, RW_WRITER, TOP_REMOVE, retry); 313002ff05a9Svsakar if (indeadlock) 313102ff05a9Svsakar goto retry_remove; 31327c478bd9Sstevel@tonic-gate error = ufs_dirremove(ip, nm, (struct inode *)0, (struct vnode *)0, 31339b5097eeSOwen Roberts DR_REMOVE, cr); 31347c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 31357c478bd9Sstevel@tonic-gate 31367c478bd9Sstevel@tonic-gate if (ulp) { 31377c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_REMOVE, trans_size); 31387c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 31397c478bd9Sstevel@tonic-gate } 31407c478bd9Sstevel@tonic-gate 31417c478bd9Sstevel@tonic-gate out: 31427c478bd9Sstevel@tonic-gate return (error); 31437c478bd9Sstevel@tonic-gate } 31447c478bd9Sstevel@tonic-gate 31457c478bd9Sstevel@tonic-gate /* 31467c478bd9Sstevel@tonic-gate * Link a file or a directory. Only privileged processes are allowed to 31477c478bd9Sstevel@tonic-gate * make links to directories. 31487c478bd9Sstevel@tonic-gate */ 3149da6c28aaSamw /*ARGSUSED*/ 31507c478bd9Sstevel@tonic-gate static int 3151da6c28aaSamw ufs_link(struct vnode *tdvp, struct vnode *svp, char *tnm, struct cred *cr, 315280d5689fSPatrick Mooney caller_context_t *ct, int flags) 31537c478bd9Sstevel@tonic-gate { 31547c478bd9Sstevel@tonic-gate struct inode *sip; 31557c478bd9Sstevel@tonic-gate struct inode *tdp = VTOI(tdvp); 31567c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = tdp->i_ufsvfs; 31577c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 31587c478bd9Sstevel@tonic-gate struct vnode *realvp; 31597c478bd9Sstevel@tonic-gate int error; 31607c478bd9Sstevel@tonic-gate int issync; 31617c478bd9Sstevel@tonic-gate int trans_size; 31627c478bd9Sstevel@tonic-gate int isdev; 316302ff05a9Svsakar int indeadlock; 31647c478bd9Sstevel@tonic-gate 316502ff05a9Svsakar retry_link: 31667c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_LINK_MASK); 31677c478bd9Sstevel@tonic-gate if (error) 31687c478bd9Sstevel@tonic-gate goto out; 31697c478bd9Sstevel@tonic-gate 31707c478bd9Sstevel@tonic-gate if (ulp) 31717c478bd9Sstevel@tonic-gate TRANS_BEGIN_CSYNC(ufsvfsp, issync, TOP_LINK, 31727c478bd9Sstevel@tonic-gate trans_size = (int)TOP_LINK_SIZE(VTOI(tdvp))); 31737c478bd9Sstevel@tonic-gate 3174da6c28aaSamw if (VOP_REALVP(svp, &realvp, ct) == 0) 31757c478bd9Sstevel@tonic-gate svp = realvp; 31767c478bd9Sstevel@tonic-gate 31777c478bd9Sstevel@tonic-gate /* 31787c478bd9Sstevel@tonic-gate * Make sure link for extended attributes is valid 31797c478bd9Sstevel@tonic-gate * We only support hard linking of attr in ATTRDIR to ATTRDIR 31807c478bd9Sstevel@tonic-gate * 31817c478bd9Sstevel@tonic-gate * Make certain we don't attempt to look at a device node as 31827c478bd9Sstevel@tonic-gate * a ufs inode. 31837c478bd9Sstevel@tonic-gate */ 31847c478bd9Sstevel@tonic-gate 31857c478bd9Sstevel@tonic-gate isdev = IS_DEVVP(svp); 31867c478bd9Sstevel@tonic-gate if (((isdev == 0) && ((VTOI(svp)->i_cflags & IXATTR) == 0) && 31877c478bd9Sstevel@tonic-gate ((tdp->i_mode & IFMT) == IFATTRDIR)) || 31887c478bd9Sstevel@tonic-gate ((isdev == 0) && (VTOI(svp)->i_cflags & IXATTR) && 31897c478bd9Sstevel@tonic-gate ((tdp->i_mode & IFMT) == IFDIR))) { 31907c478bd9Sstevel@tonic-gate error = EINVAL; 31917c478bd9Sstevel@tonic-gate goto unlock; 31927c478bd9Sstevel@tonic-gate } 31937c478bd9Sstevel@tonic-gate 31947c478bd9Sstevel@tonic-gate sip = VTOI(svp); 31957c478bd9Sstevel@tonic-gate if ((svp->v_type == VDIR && 31967c478bd9Sstevel@tonic-gate secpolicy_fs_linkdir(cr, ufsvfsp->vfs_vfs) != 0) || 31977c478bd9Sstevel@tonic-gate (sip->i_uid != crgetuid(cr) && secpolicy_basic_link(cr) != 0)) { 31987c478bd9Sstevel@tonic-gate error = EPERM; 31997c478bd9Sstevel@tonic-gate goto unlock; 32007c478bd9Sstevel@tonic-gate } 320102ff05a9Svsakar 320202ff05a9Svsakar /* 320302ff05a9Svsakar * ufs_tryirwlock_trans uses rw_tryenter and checks for SLOCK 320402ff05a9Svsakar * to avoid i_rwlock, ufs_lockfs_begin deadlock. If deadlock 320502ff05a9Svsakar * possible, retries the operation. 320602ff05a9Svsakar */ 320702ff05a9Svsakar ufs_tryirwlock_trans(&tdp->i_rwlock, RW_WRITER, TOP_LINK, retry); 320802ff05a9Svsakar if (indeadlock) 320902ff05a9Svsakar goto retry_link; 32107c478bd9Sstevel@tonic-gate error = ufs_direnter_lr(tdp, tnm, DE_LINK, (struct inode *)0, 32119b5097eeSOwen Roberts sip, cr); 32127c478bd9Sstevel@tonic-gate rw_exit(&tdp->i_rwlock); 32137c478bd9Sstevel@tonic-gate 32147c478bd9Sstevel@tonic-gate unlock: 32157c478bd9Sstevel@tonic-gate if (ulp) { 32167c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_LINK, trans_size); 32177c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 32187c478bd9Sstevel@tonic-gate } 3219df2381bfSpraks 3220df2381bfSpraks if (!error) { 3221da6c28aaSamw vnevent_link(svp, ct); 3222df2381bfSpraks } 32237c478bd9Sstevel@tonic-gate out: 32247c478bd9Sstevel@tonic-gate return (error); 32257c478bd9Sstevel@tonic-gate } 32267c478bd9Sstevel@tonic-gate 32277c478bd9Sstevel@tonic-gate uint64_t ufs_rename_retry_cnt; 32287c478bd9Sstevel@tonic-gate uint64_t ufs_rename_upgrade_retry_cnt; 32297c478bd9Sstevel@tonic-gate uint64_t ufs_rename_dircheck_retry_cnt; 32307c478bd9Sstevel@tonic-gate clock_t ufs_rename_backoff_delay = 1; 32317c478bd9Sstevel@tonic-gate 32327c478bd9Sstevel@tonic-gate /* 32337c478bd9Sstevel@tonic-gate * Rename a file or directory. 32347c478bd9Sstevel@tonic-gate * We are given the vnode and entry string of the source and the 32357c478bd9Sstevel@tonic-gate * vnode and entry string of the place we want to move the source 32367c478bd9Sstevel@tonic-gate * to (the target). The essential operation is: 32377c478bd9Sstevel@tonic-gate * unlink(target); 32387c478bd9Sstevel@tonic-gate * link(source, target); 32397c478bd9Sstevel@tonic-gate * unlink(source); 32407c478bd9Sstevel@tonic-gate * but "atomically". Can't do full commit without saving state in 32417c478bd9Sstevel@tonic-gate * the inode on disk, which isn't feasible at this time. Best we 32427c478bd9Sstevel@tonic-gate * can do is always guarantee that the TARGET exists. 32437c478bd9Sstevel@tonic-gate */ 3244baa4d099Sswilcox 32457c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 32467c478bd9Sstevel@tonic-gate static int 324780d5689fSPatrick Mooney ufs_rename(struct vnode *sdvp, char *snm, struct vnode *tdvp, char *tnm, 324880d5689fSPatrick Mooney struct cred *cr, caller_context_t *ct, int flags) 32497c478bd9Sstevel@tonic-gate { 32507c478bd9Sstevel@tonic-gate struct inode *sip = NULL; /* source inode */ 3251baa4d099Sswilcox struct inode *ip = NULL; /* check inode */ 32527c478bd9Sstevel@tonic-gate struct inode *sdp; /* old (source) parent inode */ 32537c478bd9Sstevel@tonic-gate struct inode *tdp; /* new (target) parent inode */ 32549b5097eeSOwen Roberts struct vnode *svp = NULL; /* source vnode */ 32557c478bd9Sstevel@tonic-gate struct vnode *tvp = NULL; /* target vnode, if it exists */ 32567c478bd9Sstevel@tonic-gate struct vnode *realvp; 32577c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 325854207fd2SJerry Jelinek struct ulockfs *ulp = NULL; 32595b024a5bSbatschul struct ufs_slot slot; 3260baa4d099Sswilcox timestruc_t now; 32617c478bd9Sstevel@tonic-gate int error; 32627c478bd9Sstevel@tonic-gate int issync; 32637c478bd9Sstevel@tonic-gate int trans_size; 326402ff05a9Svsakar krwlock_t *first_lock; 326502ff05a9Svsakar krwlock_t *second_lock; 326602ff05a9Svsakar krwlock_t *reverse_lock; 32679b5097eeSOwen Roberts int serr, terr; 32687c478bd9Sstevel@tonic-gate 32697c478bd9Sstevel@tonic-gate sdp = VTOI(sdvp); 3270baa4d099Sswilcox slot.fbp = NULL; 32717c478bd9Sstevel@tonic-gate ufsvfsp = sdp->i_ufsvfs; 32729b5097eeSOwen Roberts 32739b5097eeSOwen Roberts if (VOP_REALVP(tdvp, &realvp, ct) == 0) 32749b5097eeSOwen Roberts tdvp = realvp; 32759b5097eeSOwen Roberts 327654207fd2SJerry Jelinek /* Must do this before taking locks in case of DNLC miss */ 32779b5097eeSOwen Roberts terr = ufs_eventlookup(tdvp, tnm, cr, &tvp); 32789b5097eeSOwen Roberts serr = ufs_eventlookup(sdvp, snm, cr, &svp); 32799b5097eeSOwen Roberts 32809b5097eeSOwen Roberts if ((serr == 0) && ((terr == 0) || (terr == ENOENT))) { 32819b5097eeSOwen Roberts if (tvp != NULL) 328254207fd2SJerry Jelinek vnevent_pre_rename_dest(tvp, tdvp, tnm, ct); 32839b5097eeSOwen Roberts 32849b5097eeSOwen Roberts /* 32859b5097eeSOwen Roberts * Notify the target directory of the rename event 32869b5097eeSOwen Roberts * if source and target directories are not the same. 32879b5097eeSOwen Roberts */ 32889b5097eeSOwen Roberts if (sdvp != tdvp) 328954207fd2SJerry Jelinek vnevent_pre_rename_dest_dir(tdvp, svp, tnm, ct); 32909b5097eeSOwen Roberts 32919b5097eeSOwen Roberts if (svp != NULL) 329254207fd2SJerry Jelinek vnevent_pre_rename_src(svp, sdvp, snm, ct); 32939b5097eeSOwen Roberts } 32949b5097eeSOwen Roberts 32959b5097eeSOwen Roberts if (svp != NULL) 32969b5097eeSOwen Roberts VN_RELE(svp); 32979b5097eeSOwen Roberts 329802ff05a9Svsakar retry_rename: 32997c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_RENAME_MASK); 33007c478bd9Sstevel@tonic-gate if (error) 330154207fd2SJerry Jelinek goto unlock; 33027c478bd9Sstevel@tonic-gate 33037c478bd9Sstevel@tonic-gate if (ulp) 33047c478bd9Sstevel@tonic-gate TRANS_BEGIN_CSYNC(ufsvfsp, issync, TOP_RENAME, 33057c478bd9Sstevel@tonic-gate trans_size = (int)TOP_RENAME_SIZE(sdp)); 33067c478bd9Sstevel@tonic-gate 3307da6c28aaSamw if (VOP_REALVP(tdvp, &realvp, ct) == 0) 33087c478bd9Sstevel@tonic-gate tdvp = realvp; 33097c478bd9Sstevel@tonic-gate 33107c478bd9Sstevel@tonic-gate tdp = VTOI(tdvp); 33117c478bd9Sstevel@tonic-gate 33127c478bd9Sstevel@tonic-gate /* 33137c478bd9Sstevel@tonic-gate * We only allow renaming of attributes from ATTRDIR to ATTRDIR. 33147c478bd9Sstevel@tonic-gate */ 33157c478bd9Sstevel@tonic-gate if ((tdp->i_mode & IFMT) != (sdp->i_mode & IFMT)) { 33167c478bd9Sstevel@tonic-gate error = EINVAL; 33177c478bd9Sstevel@tonic-gate goto unlock; 33187c478bd9Sstevel@tonic-gate } 33197c478bd9Sstevel@tonic-gate 332060c8e821SFrank Batschulat /* 332160c8e821SFrank Batschulat * Check accessibility of directory. 332260c8e821SFrank Batschulat */ 332360c8e821SFrank Batschulat if (error = ufs_diraccess(sdp, IEXEC, cr)) 332460c8e821SFrank Batschulat goto unlock; 332560c8e821SFrank Batschulat 33267c478bd9Sstevel@tonic-gate /* 33277c478bd9Sstevel@tonic-gate * Look up inode of file we're supposed to rename. 33287c478bd9Sstevel@tonic-gate */ 3329baa4d099Sswilcox gethrestime(&now); 33309b5097eeSOwen Roberts if (error = ufs_dirlook(sdp, snm, &sip, cr, 0, 0)) { 333102ff05a9Svsakar if (error == EAGAIN) { 333202ff05a9Svsakar if (ulp) { 333302ff05a9Svsakar TRANS_END_CSYNC(ufsvfsp, error, issync, 333480d34432Sfrankho TOP_RENAME, trans_size); 333502ff05a9Svsakar ufs_lockfs_end(ulp); 333602ff05a9Svsakar } 333702ff05a9Svsakar goto retry_rename; 333802ff05a9Svsakar } 333902ff05a9Svsakar 33407c478bd9Sstevel@tonic-gate goto unlock; 33417c478bd9Sstevel@tonic-gate } 33427c478bd9Sstevel@tonic-gate 33437c478bd9Sstevel@tonic-gate /* 33447c478bd9Sstevel@tonic-gate * Lock both the source and target directories (they may be 33457c478bd9Sstevel@tonic-gate * the same) to provide the atomicity semantics that was 33467c478bd9Sstevel@tonic-gate * previously provided by the per file system vfs_rename_lock 33477c478bd9Sstevel@tonic-gate * 33487c478bd9Sstevel@tonic-gate * with vfs_rename_lock removed to allow simultaneous renames 33497c478bd9Sstevel@tonic-gate * within a file system, ufs_dircheckpath can deadlock while 33507c478bd9Sstevel@tonic-gate * traversing back to ensure that source is not a parent directory 33517c478bd9Sstevel@tonic-gate * of target parent directory. This is because we get into 33527c478bd9Sstevel@tonic-gate * ufs_dircheckpath with the sdp and tdp locks held as RW_WRITER. 33537c478bd9Sstevel@tonic-gate * If the tdp and sdp of the simultaneous renames happen to be 33547c478bd9Sstevel@tonic-gate * in the path of each other, it can lead to a deadlock. This 33557c478bd9Sstevel@tonic-gate * can be avoided by getting the locks as RW_READER here and then 33567c478bd9Sstevel@tonic-gate * upgrading to RW_WRITER after completing the ufs_dircheckpath. 335702ff05a9Svsakar * 335802ff05a9Svsakar * We hold the target directory's i_rwlock after calling 335902ff05a9Svsakar * ufs_lockfs_begin but in many other operations (like ufs_readdir) 336002ff05a9Svsakar * VOP_RWLOCK is explicitly called by the filesystem independent code 336102ff05a9Svsakar * before calling the file system operation. In these cases the order 336202ff05a9Svsakar * is reversed (i.e i_rwlock is taken first and then ufs_lockfs_begin 336302ff05a9Svsakar * is called). This is fine as long as ufs_lockfs_begin acts as a VOP 336402ff05a9Svsakar * counter but with ufs_quiesce setting the SLOCK bit this becomes a 336502ff05a9Svsakar * synchronizing object which might lead to a deadlock. So we use 336602ff05a9Svsakar * rw_tryenter instead of rw_enter. If we fail to get this lock and 336702ff05a9Svsakar * find that SLOCK bit is set, we call ufs_lockfs_end and restart the 336802ff05a9Svsakar * operation. 33697c478bd9Sstevel@tonic-gate */ 33707c478bd9Sstevel@tonic-gate retry: 337102ff05a9Svsakar first_lock = &tdp->i_rwlock; 337202ff05a9Svsakar second_lock = &sdp->i_rwlock; 337302ff05a9Svsakar retry_firstlock: 337402ff05a9Svsakar if (!rw_tryenter(first_lock, RW_READER)) { 33757c478bd9Sstevel@tonic-gate /* 337602ff05a9Svsakar * We didn't get the lock. Check if the SLOCK is set in the 337702ff05a9Svsakar * ufsvfs. If yes, we might be in a deadlock. Safer to give up 337802ff05a9Svsakar * and wait for SLOCK to be cleared. 33797c478bd9Sstevel@tonic-gate */ 338002ff05a9Svsakar 338102ff05a9Svsakar if (ulp && ULOCKFS_IS_SLOCK(ulp)) { 338202ff05a9Svsakar TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_RENAME, 338380d34432Sfrankho trans_size); 338402ff05a9Svsakar ufs_lockfs_end(ulp); 338502ff05a9Svsakar goto retry_rename; 338602ff05a9Svsakar 338702ff05a9Svsakar } else { 33887c478bd9Sstevel@tonic-gate /* 338902ff05a9Svsakar * SLOCK isn't set so this is a genuine synchronization 339002ff05a9Svsakar * case. Let's try again after giving them a breather. 33917c478bd9Sstevel@tonic-gate */ 339202ff05a9Svsakar delay(RETRY_LOCK_DELAY); 339302ff05a9Svsakar goto retry_firstlock; 339402ff05a9Svsakar } 339502ff05a9Svsakar } 339602ff05a9Svsakar /* 339702ff05a9Svsakar * Need to check if the tdp and sdp are same !!! 339802ff05a9Svsakar */ 339902ff05a9Svsakar if ((tdp != sdp) && (!rw_tryenter(second_lock, RW_READER))) { 340002ff05a9Svsakar /* 340102ff05a9Svsakar * We didn't get the lock. Check if the SLOCK is set in the 340202ff05a9Svsakar * ufsvfs. If yes, we might be in a deadlock. Safer to give up 340302ff05a9Svsakar * and wait for SLOCK to be cleared. 340402ff05a9Svsakar */ 340502ff05a9Svsakar 340602ff05a9Svsakar rw_exit(first_lock); 340702ff05a9Svsakar if (ulp && ULOCKFS_IS_SLOCK(ulp)) { 340802ff05a9Svsakar TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_RENAME, 340980d34432Sfrankho trans_size); 341002ff05a9Svsakar ufs_lockfs_end(ulp); 341102ff05a9Svsakar goto retry_rename; 341202ff05a9Svsakar 341302ff05a9Svsakar } else { 341402ff05a9Svsakar /* 341502ff05a9Svsakar * So we couldn't get the second level peer lock *and* 341602ff05a9Svsakar * the SLOCK bit isn't set. Too bad we can be 341702ff05a9Svsakar * contentding with someone wanting these locks otherway 341802ff05a9Svsakar * round. Reverse the locks in case there is a heavy 341902ff05a9Svsakar * contention for the second level lock. 342002ff05a9Svsakar */ 342102ff05a9Svsakar reverse_lock = first_lock; 342202ff05a9Svsakar first_lock = second_lock; 342302ff05a9Svsakar second_lock = reverse_lock; 342402ff05a9Svsakar ufs_rename_retry_cnt++; 342502ff05a9Svsakar goto retry_firstlock; 34267c478bd9Sstevel@tonic-gate } 34277c478bd9Sstevel@tonic-gate } 34287c478bd9Sstevel@tonic-gate 34297c478bd9Sstevel@tonic-gate if (sip == tdp) { 34307c478bd9Sstevel@tonic-gate error = EINVAL; 34317c478bd9Sstevel@tonic-gate goto errout; 34327c478bd9Sstevel@tonic-gate } 34337c478bd9Sstevel@tonic-gate /* 34347c478bd9Sstevel@tonic-gate * Make sure we can delete the source entry. This requires 34357c478bd9Sstevel@tonic-gate * write permission on the containing directory. 34367c478bd9Sstevel@tonic-gate * Check for sticky directories. 34377c478bd9Sstevel@tonic-gate */ 34387c478bd9Sstevel@tonic-gate rw_enter(&sdp->i_contents, RW_READER); 34397c478bd9Sstevel@tonic-gate rw_enter(&sip->i_contents, RW_READER); 344060c8e821SFrank Batschulat if ((error = ufs_iaccess(sdp, IWRITE, cr, 0)) != 0 || 34417c478bd9Sstevel@tonic-gate (error = ufs_sticky_remove_access(sdp, sip, cr)) != 0) { 34427c478bd9Sstevel@tonic-gate rw_exit(&sip->i_contents); 34437c478bd9Sstevel@tonic-gate rw_exit(&sdp->i_contents); 34447c478bd9Sstevel@tonic-gate goto errout; 34457c478bd9Sstevel@tonic-gate } 34467c478bd9Sstevel@tonic-gate 34477c478bd9Sstevel@tonic-gate /* 34487c478bd9Sstevel@tonic-gate * If this is a rename of a directory and the parent is 34497c478bd9Sstevel@tonic-gate * different (".." must be changed), then the source 34507c478bd9Sstevel@tonic-gate * directory must not be in the directory hierarchy 34517c478bd9Sstevel@tonic-gate * above the target, as this would orphan everything 34527c478bd9Sstevel@tonic-gate * below the source directory. Also the user must have 34537c478bd9Sstevel@tonic-gate * write permission in the source so as to be able to 34547c478bd9Sstevel@tonic-gate * change "..". 34557c478bd9Sstevel@tonic-gate */ 34567c478bd9Sstevel@tonic-gate if ((((sip->i_mode & IFMT) == IFDIR) || 34577c478bd9Sstevel@tonic-gate ((sip->i_mode & IFMT) == IFATTRDIR)) && sdp != tdp) { 34587c478bd9Sstevel@tonic-gate ino_t inum; 34597c478bd9Sstevel@tonic-gate 346060c8e821SFrank Batschulat if (error = ufs_iaccess(sip, IWRITE, cr, 0)) { 34617c478bd9Sstevel@tonic-gate rw_exit(&sip->i_contents); 34627c478bd9Sstevel@tonic-gate rw_exit(&sdp->i_contents); 34637c478bd9Sstevel@tonic-gate goto errout; 34647c478bd9Sstevel@tonic-gate } 34657c478bd9Sstevel@tonic-gate inum = sip->i_number; 34667c478bd9Sstevel@tonic-gate rw_exit(&sip->i_contents); 34677c478bd9Sstevel@tonic-gate rw_exit(&sdp->i_contents); 34687c478bd9Sstevel@tonic-gate if ((error = ufs_dircheckpath(inum, tdp, sdp, cr))) { 34697c478bd9Sstevel@tonic-gate /* 34707c478bd9Sstevel@tonic-gate * If we got EAGAIN ufs_dircheckpath detected a 34717c478bd9Sstevel@tonic-gate * potential deadlock and backed out. We need 34727c478bd9Sstevel@tonic-gate * to retry the operation since sdp and tdp have 34737c478bd9Sstevel@tonic-gate * to be released to avoid the deadlock. 34747c478bd9Sstevel@tonic-gate */ 34757c478bd9Sstevel@tonic-gate if (error == EAGAIN) { 34767c478bd9Sstevel@tonic-gate rw_exit(&tdp->i_rwlock); 34777c478bd9Sstevel@tonic-gate if (tdp != sdp) 34787c478bd9Sstevel@tonic-gate rw_exit(&sdp->i_rwlock); 34797c478bd9Sstevel@tonic-gate delay(ufs_rename_backoff_delay); 34807c478bd9Sstevel@tonic-gate ufs_rename_dircheck_retry_cnt++; 34817c478bd9Sstevel@tonic-gate goto retry; 34827c478bd9Sstevel@tonic-gate } 34837c478bd9Sstevel@tonic-gate goto errout; 34847c478bd9Sstevel@tonic-gate } 34857c478bd9Sstevel@tonic-gate } else { 34867c478bd9Sstevel@tonic-gate rw_exit(&sip->i_contents); 34877c478bd9Sstevel@tonic-gate rw_exit(&sdp->i_contents); 34887c478bd9Sstevel@tonic-gate } 34897c478bd9Sstevel@tonic-gate 34907c478bd9Sstevel@tonic-gate 34917c478bd9Sstevel@tonic-gate /* 34927c478bd9Sstevel@tonic-gate * Check for renaming '.' or '..' or alias of '.' 34937c478bd9Sstevel@tonic-gate */ 34947c478bd9Sstevel@tonic-gate if (strcmp(snm, ".") == 0 || strcmp(snm, "..") == 0 || sdp == sip) { 34957c478bd9Sstevel@tonic-gate error = EINVAL; 34967c478bd9Sstevel@tonic-gate goto errout; 34977c478bd9Sstevel@tonic-gate } 34987c478bd9Sstevel@tonic-gate 34997c478bd9Sstevel@tonic-gate /* 35007c478bd9Sstevel@tonic-gate * Simultaneous renames can deadlock in ufs_dircheckpath since it 35017c478bd9Sstevel@tonic-gate * tries to traverse back the file tree with both tdp and sdp held 35027c478bd9Sstevel@tonic-gate * as RW_WRITER. To avoid that we have to hold the tdp and sdp locks 35037c478bd9Sstevel@tonic-gate * as RW_READERS till ufs_dircheckpath is done. 35047c478bd9Sstevel@tonic-gate * Now that ufs_dircheckpath is done with, we can upgrade the locks 35057c478bd9Sstevel@tonic-gate * to RW_WRITER. 35067c478bd9Sstevel@tonic-gate */ 35077c478bd9Sstevel@tonic-gate if (!rw_tryupgrade(&tdp->i_rwlock)) { 35087c478bd9Sstevel@tonic-gate /* 35097c478bd9Sstevel@tonic-gate * The upgrade failed. We got to give away the lock 35107c478bd9Sstevel@tonic-gate * as to avoid deadlocking with someone else who is 35117c478bd9Sstevel@tonic-gate * waiting for writer lock. With the lock gone, we 35127c478bd9Sstevel@tonic-gate * cannot be sure the checks done above will hold 35137c478bd9Sstevel@tonic-gate * good when we eventually get them back as writer. 35147c478bd9Sstevel@tonic-gate * So if we can't upgrade we drop the locks and retry 35157c478bd9Sstevel@tonic-gate * everything again. 35167c478bd9Sstevel@tonic-gate */ 35177c478bd9Sstevel@tonic-gate rw_exit(&tdp->i_rwlock); 35187c478bd9Sstevel@tonic-gate if (tdp != sdp) 35197c478bd9Sstevel@tonic-gate rw_exit(&sdp->i_rwlock); 35207c478bd9Sstevel@tonic-gate delay(ufs_rename_backoff_delay); 35217c478bd9Sstevel@tonic-gate ufs_rename_upgrade_retry_cnt++; 35227c478bd9Sstevel@tonic-gate goto retry; 35237c478bd9Sstevel@tonic-gate } 35247c478bd9Sstevel@tonic-gate if (tdp != sdp) { 35257c478bd9Sstevel@tonic-gate if (!rw_tryupgrade(&sdp->i_rwlock)) { 35267c478bd9Sstevel@tonic-gate /* 35277c478bd9Sstevel@tonic-gate * The upgrade failed. We got to give away the lock 35287c478bd9Sstevel@tonic-gate * as to avoid deadlocking with someone else who is 35297c478bd9Sstevel@tonic-gate * waiting for writer lock. With the lock gone, we 35307c478bd9Sstevel@tonic-gate * cannot be sure the checks done above will hold 35317c478bd9Sstevel@tonic-gate * good when we eventually get them back as writer. 35327c478bd9Sstevel@tonic-gate * So if we can't upgrade we drop the locks and retry 35337c478bd9Sstevel@tonic-gate * everything again. 35347c478bd9Sstevel@tonic-gate */ 35357c478bd9Sstevel@tonic-gate rw_exit(&tdp->i_rwlock); 35367c478bd9Sstevel@tonic-gate rw_exit(&sdp->i_rwlock); 35377c478bd9Sstevel@tonic-gate delay(ufs_rename_backoff_delay); 35387c478bd9Sstevel@tonic-gate ufs_rename_upgrade_retry_cnt++; 35397c478bd9Sstevel@tonic-gate goto retry; 35407c478bd9Sstevel@tonic-gate } 35417c478bd9Sstevel@tonic-gate } 3542baa4d099Sswilcox 3543baa4d099Sswilcox /* 3544baa4d099Sswilcox * Now that all the locks are held check to make sure another thread 3545baa4d099Sswilcox * didn't slip in and take out the sip. 3546baa4d099Sswilcox */ 3547baa4d099Sswilcox slot.status = NONE; 3548baa4d099Sswilcox if ((sip->i_ctime.tv_usec * 1000) > now.tv_nsec || 3549baa4d099Sswilcox sip->i_ctime.tv_sec > now.tv_sec) { 3550baa4d099Sswilcox rw_enter(&sdp->i_ufsvfs->vfs_dqrwlock, RW_READER); 3551baa4d099Sswilcox rw_enter(&sdp->i_contents, RW_WRITER); 3552baa4d099Sswilcox error = ufs_dircheckforname(sdp, snm, strlen(snm), &slot, 3553baa4d099Sswilcox &ip, cr, 0); 3554baa4d099Sswilcox rw_exit(&sdp->i_contents); 3555baa4d099Sswilcox rw_exit(&sdp->i_ufsvfs->vfs_dqrwlock); 3556baa4d099Sswilcox if (error) { 3557baa4d099Sswilcox goto errout; 3558baa4d099Sswilcox } 3559baa4d099Sswilcox if (ip == NULL) { 3560baa4d099Sswilcox error = ENOENT; 3561baa4d099Sswilcox goto errout; 3562baa4d099Sswilcox } else { 3563baa4d099Sswilcox /* 3564baa4d099Sswilcox * If the inode was found need to drop the v_count 3565baa4d099Sswilcox * so as not to keep the filesystem from being 3566baa4d099Sswilcox * unmounted at a later time. 3567baa4d099Sswilcox */ 3568baa4d099Sswilcox VN_RELE(ITOV(ip)); 3569baa4d099Sswilcox } 3570baa4d099Sswilcox 3571baa4d099Sswilcox /* 3572baa4d099Sswilcox * Release the slot.fbp that has the page mapped and 3573baa4d099Sswilcox * locked SE_SHARED, and could be used in in 3574baa4d099Sswilcox * ufs_direnter_lr() which needs to get the SE_EXCL lock 3575baa4d099Sswilcox * on said page. 3576baa4d099Sswilcox */ 3577baa4d099Sswilcox if (slot.fbp) { 3578baa4d099Sswilcox fbrelse(slot.fbp, S_OTHER); 3579baa4d099Sswilcox slot.fbp = NULL; 3580baa4d099Sswilcox } 3581baa4d099Sswilcox } 3582baa4d099Sswilcox 35837c478bd9Sstevel@tonic-gate /* 35849b5097eeSOwen Roberts * Link source to the target. 35857c478bd9Sstevel@tonic-gate */ 35869b5097eeSOwen Roberts if (error = ufs_direnter_lr(tdp, tnm, DE_RENAME, sdp, sip, cr)) { 35877c478bd9Sstevel@tonic-gate /* 35887c478bd9Sstevel@tonic-gate * ESAME isn't really an error; it indicates that the 35897c478bd9Sstevel@tonic-gate * operation should not be done because the source and target 35907c478bd9Sstevel@tonic-gate * are the same file, but that no error should be reported. 35917c478bd9Sstevel@tonic-gate */ 35927c478bd9Sstevel@tonic-gate if (error == ESAME) 35937c478bd9Sstevel@tonic-gate error = 0; 35947c478bd9Sstevel@tonic-gate goto errout; 35957c478bd9Sstevel@tonic-gate } 35967c478bd9Sstevel@tonic-gate 359754207fd2SJerry Jelinek if (error == 0 && tvp != NULL) 359854207fd2SJerry Jelinek vnevent_rename_dest(tvp, tdvp, tnm, ct); 359954207fd2SJerry Jelinek 36007c478bd9Sstevel@tonic-gate /* 36017c478bd9Sstevel@tonic-gate * Unlink the source. 36027c478bd9Sstevel@tonic-gate * Remove the source entry. ufs_dirremove() checks that the entry 36037c478bd9Sstevel@tonic-gate * still reflects sip, and returns an error if it doesn't. 36047c478bd9Sstevel@tonic-gate * If the entry has changed just forget about it. Release 36057c478bd9Sstevel@tonic-gate * the source inode. 36067c478bd9Sstevel@tonic-gate */ 36077c478bd9Sstevel@tonic-gate if ((error = ufs_dirremove(sdp, snm, sip, (struct vnode *)0, 36089b5097eeSOwen Roberts DR_RENAME, cr)) == ENOENT) 36097c478bd9Sstevel@tonic-gate error = 0; 36107c478bd9Sstevel@tonic-gate 361154207fd2SJerry Jelinek if (error == 0) { 361254207fd2SJerry Jelinek vnevent_rename_src(ITOV(sip), sdvp, snm, ct); 361354207fd2SJerry Jelinek /* 361454207fd2SJerry Jelinek * Notify the target directory of the rename event 361554207fd2SJerry Jelinek * if source and target directories are not the same. 361654207fd2SJerry Jelinek */ 361754207fd2SJerry Jelinek if (sdvp != tdvp) 361854207fd2SJerry Jelinek vnevent_rename_dest_dir(tdvp, ct); 361954207fd2SJerry Jelinek } 362054207fd2SJerry Jelinek 36217c478bd9Sstevel@tonic-gate errout: 3622baa4d099Sswilcox if (slot.fbp) 3623baa4d099Sswilcox fbrelse(slot.fbp, S_OTHER); 3624baa4d099Sswilcox 36257c478bd9Sstevel@tonic-gate rw_exit(&tdp->i_rwlock); 36267c478bd9Sstevel@tonic-gate if (sdp != tdp) { 36277c478bd9Sstevel@tonic-gate rw_exit(&sdp->i_rwlock); 36287c478bd9Sstevel@tonic-gate } 36297c478bd9Sstevel@tonic-gate 36307c478bd9Sstevel@tonic-gate unlock: 363154207fd2SJerry Jelinek if (tvp != NULL) 363254207fd2SJerry Jelinek VN_RELE(tvp); 363354207fd2SJerry Jelinek if (sip != NULL) 363454207fd2SJerry Jelinek VN_RELE(ITOV(sip)); 363554207fd2SJerry Jelinek 36367c478bd9Sstevel@tonic-gate if (ulp) { 36377c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_RENAME, trans_size); 36387c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 36397c478bd9Sstevel@tonic-gate } 36407c478bd9Sstevel@tonic-gate 36417c478bd9Sstevel@tonic-gate return (error); 36427c478bd9Sstevel@tonic-gate } 36437c478bd9Sstevel@tonic-gate 36447c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 36457c478bd9Sstevel@tonic-gate static int 36467c478bd9Sstevel@tonic-gate ufs_mkdir(struct vnode *dvp, char *dirname, struct vattr *vap, 364780d5689fSPatrick Mooney struct vnode **vpp, struct cred *cr, caller_context_t *ct, int flags, 364880d5689fSPatrick Mooney vsecattr_t *vsecp) 36497c478bd9Sstevel@tonic-gate { 36507c478bd9Sstevel@tonic-gate struct inode *ip; 36517c478bd9Sstevel@tonic-gate struct inode *xip; 36527c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 36537c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 36547c478bd9Sstevel@tonic-gate int error; 36557c478bd9Sstevel@tonic-gate int issync; 36567c478bd9Sstevel@tonic-gate int trans_size; 365702ff05a9Svsakar int indeadlock; 36587c478bd9Sstevel@tonic-gate int retry = 1; 36597c478bd9Sstevel@tonic-gate 36607c478bd9Sstevel@tonic-gate ASSERT((vap->va_mask & (AT_TYPE|AT_MODE)) == (AT_TYPE|AT_MODE)); 36617c478bd9Sstevel@tonic-gate 36627c478bd9Sstevel@tonic-gate /* 36637c478bd9Sstevel@tonic-gate * Can't make directory in attr hidden dir 36647c478bd9Sstevel@tonic-gate */ 36657c478bd9Sstevel@tonic-gate if ((VTOI(dvp)->i_mode & IFMT) == IFATTRDIR) 36667c478bd9Sstevel@tonic-gate return (EINVAL); 36677c478bd9Sstevel@tonic-gate 36687c478bd9Sstevel@tonic-gate again: 36697c478bd9Sstevel@tonic-gate ip = VTOI(dvp); 36707c478bd9Sstevel@tonic-gate ufsvfsp = ip->i_ufsvfs; 36717c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_MKDIR_MASK); 36727c478bd9Sstevel@tonic-gate if (error) 36737c478bd9Sstevel@tonic-gate goto out; 36747c478bd9Sstevel@tonic-gate if (ulp) 36757c478bd9Sstevel@tonic-gate TRANS_BEGIN_CSYNC(ufsvfsp, issync, TOP_MKDIR, 36767c478bd9Sstevel@tonic-gate trans_size = (int)TOP_MKDIR_SIZE(ip)); 36777c478bd9Sstevel@tonic-gate 367802ff05a9Svsakar /* 367902ff05a9Svsakar * ufs_tryirwlock_trans uses rw_tryenter and checks for SLOCK 368002ff05a9Svsakar * to avoid i_rwlock, ufs_lockfs_begin deadlock. If deadlock 368102ff05a9Svsakar * possible, retries the operation. 368202ff05a9Svsakar */ 368302ff05a9Svsakar ufs_tryirwlock_trans(&ip->i_rwlock, RW_WRITER, TOP_MKDIR, retry); 368402ff05a9Svsakar if (indeadlock) 368502ff05a9Svsakar goto again; 36867c478bd9Sstevel@tonic-gate 36877c478bd9Sstevel@tonic-gate error = ufs_direnter_cm(ip, dirname, DE_MKDIR, vap, &xip, cr, 368880d34432Sfrankho (retry ? IQUIET : 0)); 368902ff05a9Svsakar if (error == EAGAIN) { 369002ff05a9Svsakar if (ulp) { 369102ff05a9Svsakar TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_MKDIR, 369280d34432Sfrankho trans_size); 369302ff05a9Svsakar ufs_lockfs_end(ulp); 369402ff05a9Svsakar } 369502ff05a9Svsakar goto again; 369602ff05a9Svsakar } 36977c478bd9Sstevel@tonic-gate 36987c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 36997c478bd9Sstevel@tonic-gate if (error == 0) { 37007c478bd9Sstevel@tonic-gate ip = xip; 37017c478bd9Sstevel@tonic-gate *vpp = ITOV(ip); 37027c478bd9Sstevel@tonic-gate } else if (error == EEXIST) 37037c478bd9Sstevel@tonic-gate VN_RELE(ITOV(xip)); 37047c478bd9Sstevel@tonic-gate 37057c478bd9Sstevel@tonic-gate if (ulp) { 37067c478bd9Sstevel@tonic-gate int terr = 0; 37077c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, terr, issync, TOP_MKDIR, trans_size); 37087c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 37097c478bd9Sstevel@tonic-gate if (error == 0) 37107c478bd9Sstevel@tonic-gate error = terr; 37117c478bd9Sstevel@tonic-gate } 37127c478bd9Sstevel@tonic-gate out: 37137c478bd9Sstevel@tonic-gate if ((error == ENOSPC) && retry && TRANS_ISTRANS(ufsvfsp)) { 37147c478bd9Sstevel@tonic-gate ufs_delete_drain_wait(ufsvfsp, 1); 37157c478bd9Sstevel@tonic-gate retry = 0; 37167c478bd9Sstevel@tonic-gate goto again; 37177c478bd9Sstevel@tonic-gate } 37187c478bd9Sstevel@tonic-gate 37197c478bd9Sstevel@tonic-gate return (error); 37207c478bd9Sstevel@tonic-gate } 37217c478bd9Sstevel@tonic-gate 37227c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 37237c478bd9Sstevel@tonic-gate static int 3724da6c28aaSamw ufs_rmdir(struct vnode *vp, char *nm, struct vnode *cdir, struct cred *cr, 372580d5689fSPatrick Mooney caller_context_t *ct, int flags) 37267c478bd9Sstevel@tonic-gate { 37277c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 37287c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = ip->i_ufsvfs; 37297c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 37307c478bd9Sstevel@tonic-gate vnode_t *rmvp = NULL; /* Vnode of removed directory */ 37317c478bd9Sstevel@tonic-gate int error; 37327c478bd9Sstevel@tonic-gate int issync; 373302ff05a9Svsakar int trans_size; 373402ff05a9Svsakar int indeadlock; 37357c478bd9Sstevel@tonic-gate 37367c478bd9Sstevel@tonic-gate /* 37377c478bd9Sstevel@tonic-gate * don't let the delete queue get too long 37387c478bd9Sstevel@tonic-gate */ 37397c478bd9Sstevel@tonic-gate if (ufsvfsp == NULL) { 37407c478bd9Sstevel@tonic-gate error = EIO; 37417c478bd9Sstevel@tonic-gate goto out; 37427c478bd9Sstevel@tonic-gate } 37437c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_delete.uq_ne > ufs_idle_max) 37447c478bd9Sstevel@tonic-gate ufs_delete_drain(vp->v_vfsp, 1, 1); 37457c478bd9Sstevel@tonic-gate 37469b5097eeSOwen Roberts error = ufs_eventlookup(vp, nm, cr, &rmvp); 37479b5097eeSOwen Roberts if (rmvp != NULL) { 37489b5097eeSOwen Roberts /* Only send the event if there were no errors */ 37499b5097eeSOwen Roberts if (error == 0) 37509b5097eeSOwen Roberts vnevent_rmdir(rmvp, vp, nm, ct); 37519b5097eeSOwen Roberts VN_RELE(rmvp); 37529b5097eeSOwen Roberts } 37539b5097eeSOwen Roberts 375402ff05a9Svsakar retry_rmdir: 37557c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_RMDIR_MASK); 37567c478bd9Sstevel@tonic-gate if (error) 37577c478bd9Sstevel@tonic-gate goto out; 37587c478bd9Sstevel@tonic-gate 37597c478bd9Sstevel@tonic-gate if (ulp) 376002ff05a9Svsakar TRANS_BEGIN_CSYNC(ufsvfsp, issync, TOP_RMDIR, 376180d34432Sfrankho trans_size = TOP_RMDIR_SIZE); 37627c478bd9Sstevel@tonic-gate 376302ff05a9Svsakar /* 376402ff05a9Svsakar * ufs_tryirwlock_trans uses rw_tryenter and checks for SLOCK 376502ff05a9Svsakar * to avoid i_rwlock, ufs_lockfs_begin deadlock. If deadlock 376602ff05a9Svsakar * possible, retries the operation. 376702ff05a9Svsakar */ 376802ff05a9Svsakar ufs_tryirwlock_trans(&ip->i_rwlock, RW_WRITER, TOP_RMDIR, retry); 376902ff05a9Svsakar if (indeadlock) 377002ff05a9Svsakar goto retry_rmdir; 37719b5097eeSOwen Roberts error = ufs_dirremove(ip, nm, (struct inode *)0, cdir, DR_RMDIR, cr); 37729b5097eeSOwen Roberts 37737c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 37747c478bd9Sstevel@tonic-gate 37757c478bd9Sstevel@tonic-gate if (ulp) { 37767c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_RMDIR, 377780d34432Sfrankho trans_size); 37787c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 37797c478bd9Sstevel@tonic-gate } 37807c478bd9Sstevel@tonic-gate 37817c478bd9Sstevel@tonic-gate out: 37827c478bd9Sstevel@tonic-gate return (error); 37837c478bd9Sstevel@tonic-gate } 37847c478bd9Sstevel@tonic-gate 37857c478bd9Sstevel@tonic-gate /* ARGSUSED */ 37867c478bd9Sstevel@tonic-gate static int 378780d5689fSPatrick Mooney ufs_readdir(struct vnode *vp, struct uio *uiop, struct cred *cr, int *eofp, 378880d5689fSPatrick Mooney caller_context_t *ct, int flags) 37897c478bd9Sstevel@tonic-gate { 37907c478bd9Sstevel@tonic-gate struct iovec *iovp; 37917c478bd9Sstevel@tonic-gate struct inode *ip; 37927c478bd9Sstevel@tonic-gate struct direct *idp; 37937c478bd9Sstevel@tonic-gate struct dirent64 *odp; 37947c478bd9Sstevel@tonic-gate struct fbuf *fbp; 37957c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 37967c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 37977c478bd9Sstevel@tonic-gate caddr_t outbuf; 37987c478bd9Sstevel@tonic-gate size_t bufsize; 37997c478bd9Sstevel@tonic-gate uint_t offset; 38007c478bd9Sstevel@tonic-gate uint_t bytes_wanted, total_bytes_wanted; 38017c478bd9Sstevel@tonic-gate int incount = 0; 38027c478bd9Sstevel@tonic-gate int outcount = 0; 38037c478bd9Sstevel@tonic-gate int error; 38047c478bd9Sstevel@tonic-gate 38057c478bd9Sstevel@tonic-gate ip = VTOI(vp); 38067c478bd9Sstevel@tonic-gate ASSERT(RW_READ_HELD(&ip->i_rwlock)); 38077c478bd9Sstevel@tonic-gate 38087c478bd9Sstevel@tonic-gate if (uiop->uio_loffset >= MAXOFF32_T) { 38097c478bd9Sstevel@tonic-gate if (eofp) 38107c478bd9Sstevel@tonic-gate *eofp = 1; 38117c478bd9Sstevel@tonic-gate return (0); 38127c478bd9Sstevel@tonic-gate } 38137c478bd9Sstevel@tonic-gate 38147c478bd9Sstevel@tonic-gate /* 38157c478bd9Sstevel@tonic-gate * Check if we have been called with a valid iov_len 38167c478bd9Sstevel@tonic-gate * and bail out if not, otherwise we may potentially loop 38177c478bd9Sstevel@tonic-gate * forever further down. 38187c478bd9Sstevel@tonic-gate */ 38197c478bd9Sstevel@tonic-gate if (uiop->uio_iov->iov_len <= 0) { 38207c478bd9Sstevel@tonic-gate error = EINVAL; 38217c478bd9Sstevel@tonic-gate goto out; 38227c478bd9Sstevel@tonic-gate } 38237c478bd9Sstevel@tonic-gate 38247c478bd9Sstevel@tonic-gate /* 38257c478bd9Sstevel@tonic-gate * Large Files: When we come here we are guaranteed that 38267c478bd9Sstevel@tonic-gate * uio_offset can be used safely. The high word is zero. 38277c478bd9Sstevel@tonic-gate */ 38287c478bd9Sstevel@tonic-gate 38297c478bd9Sstevel@tonic-gate ufsvfsp = ip->i_ufsvfs; 38307c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_READDIR_MASK); 38317c478bd9Sstevel@tonic-gate if (error) 38327c478bd9Sstevel@tonic-gate goto out; 38337c478bd9Sstevel@tonic-gate 38347c478bd9Sstevel@tonic-gate iovp = uiop->uio_iov; 38357c478bd9Sstevel@tonic-gate total_bytes_wanted = iovp->iov_len; 38367c478bd9Sstevel@tonic-gate 38377c478bd9Sstevel@tonic-gate /* Large Files: directory files should not be "large" */ 38387c478bd9Sstevel@tonic-gate 38397c478bd9Sstevel@tonic-gate ASSERT(ip->i_size <= MAXOFF32_T); 38407c478bd9Sstevel@tonic-gate 38417c478bd9Sstevel@tonic-gate /* Force offset to be valid (to guard against bogus lseek() values) */ 38427c478bd9Sstevel@tonic-gate offset = (uint_t)uiop->uio_offset & ~(DIRBLKSIZ - 1); 38437c478bd9Sstevel@tonic-gate 38447c478bd9Sstevel@tonic-gate /* Quit if at end of file or link count of zero (posix) */ 38457c478bd9Sstevel@tonic-gate if (offset >= (uint_t)ip->i_size || ip->i_nlink <= 0) { 38467c478bd9Sstevel@tonic-gate if (eofp) 38477c478bd9Sstevel@tonic-gate *eofp = 1; 38487c478bd9Sstevel@tonic-gate error = 0; 38497c478bd9Sstevel@tonic-gate goto unlock; 38507c478bd9Sstevel@tonic-gate } 38517c478bd9Sstevel@tonic-gate 38527c478bd9Sstevel@tonic-gate /* 38537c478bd9Sstevel@tonic-gate * Get space to change directory entries into fs independent format. 38547c478bd9Sstevel@tonic-gate * Do fast alloc for the most commonly used-request size (filesystem 38557c478bd9Sstevel@tonic-gate * block size). 38567c478bd9Sstevel@tonic-gate */ 38577c478bd9Sstevel@tonic-gate if (uiop->uio_segflg != UIO_SYSSPACE || uiop->uio_iovcnt != 1) { 38587c478bd9Sstevel@tonic-gate bufsize = total_bytes_wanted; 38597c478bd9Sstevel@tonic-gate outbuf = kmem_alloc(bufsize, KM_SLEEP); 38607c478bd9Sstevel@tonic-gate odp = (struct dirent64 *)outbuf; 38617c478bd9Sstevel@tonic-gate } else { 38627c478bd9Sstevel@tonic-gate bufsize = total_bytes_wanted; 38637c478bd9Sstevel@tonic-gate odp = (struct dirent64 *)iovp->iov_base; 38647c478bd9Sstevel@tonic-gate } 38657c478bd9Sstevel@tonic-gate 38667c478bd9Sstevel@tonic-gate nextblk: 38677c478bd9Sstevel@tonic-gate bytes_wanted = total_bytes_wanted; 38687c478bd9Sstevel@tonic-gate 38697c478bd9Sstevel@tonic-gate /* Truncate request to file size */ 38707c478bd9Sstevel@tonic-gate if (offset + bytes_wanted > (int)ip->i_size) 38717c478bd9Sstevel@tonic-gate bytes_wanted = (int)(ip->i_size - offset); 38727c478bd9Sstevel@tonic-gate 38737c478bd9Sstevel@tonic-gate /* Comply with MAXBSIZE boundary restrictions of fbread() */ 38747c478bd9Sstevel@tonic-gate if ((offset & MAXBOFFSET) + bytes_wanted > MAXBSIZE) 38757c478bd9Sstevel@tonic-gate bytes_wanted = MAXBSIZE - (offset & MAXBOFFSET); 38767c478bd9Sstevel@tonic-gate 38777c478bd9Sstevel@tonic-gate /* 38787c478bd9Sstevel@tonic-gate * Read in the next chunk. 38797c478bd9Sstevel@tonic-gate * We are still holding the i_rwlock. 38807c478bd9Sstevel@tonic-gate */ 38817c478bd9Sstevel@tonic-gate error = fbread(vp, (offset_t)offset, bytes_wanted, S_OTHER, &fbp); 38827c478bd9Sstevel@tonic-gate 38837c478bd9Sstevel@tonic-gate if (error) 38847c478bd9Sstevel@tonic-gate goto update_inode; 38857c478bd9Sstevel@tonic-gate if (!ULOCKFS_IS_NOIACC(ITOUL(ip)) && (ip->i_fs->fs_ronly == 0) && 38867c478bd9Sstevel@tonic-gate (!ufsvfsp->vfs_noatime)) { 38877c478bd9Sstevel@tonic-gate ip->i_flag |= IACC; 38887c478bd9Sstevel@tonic-gate } 38897c478bd9Sstevel@tonic-gate incount = 0; 38907c478bd9Sstevel@tonic-gate idp = (struct direct *)fbp->fb_addr; 389180d34432Sfrankho if (idp->d_ino == 0 && idp->d_reclen == 0 && idp->d_namlen == 0) { 38927c478bd9Sstevel@tonic-gate cmn_err(CE_WARN, "ufs_readdir: bad dir, inumber = %llu, " 389380d34432Sfrankho "fs = %s\n", 389480d34432Sfrankho (u_longlong_t)ip->i_number, ufsvfsp->vfs_fs->fs_fsmnt); 38957c478bd9Sstevel@tonic-gate fbrelse(fbp, S_OTHER); 38967c478bd9Sstevel@tonic-gate error = ENXIO; 38977c478bd9Sstevel@tonic-gate goto update_inode; 38987c478bd9Sstevel@tonic-gate } 38997c478bd9Sstevel@tonic-gate /* Transform to file-system independent format */ 39007c478bd9Sstevel@tonic-gate while (incount < bytes_wanted) { 39017c478bd9Sstevel@tonic-gate /* 39027c478bd9Sstevel@tonic-gate * If the current directory entry is mangled, then skip 39037c478bd9Sstevel@tonic-gate * to the next block. It would be nice to set the FSBAD 39047c478bd9Sstevel@tonic-gate * flag in the super-block so that a fsck is forced on 39057c478bd9Sstevel@tonic-gate * next reboot, but locking is a problem. 39067c478bd9Sstevel@tonic-gate */ 39077c478bd9Sstevel@tonic-gate if (idp->d_reclen & 0x3) { 39087c478bd9Sstevel@tonic-gate offset = (offset + DIRBLKSIZ) & ~(DIRBLKSIZ-1); 39097c478bd9Sstevel@tonic-gate break; 39107c478bd9Sstevel@tonic-gate } 39117c478bd9Sstevel@tonic-gate 39127c478bd9Sstevel@tonic-gate /* Skip to requested offset and skip empty entries */ 39137c478bd9Sstevel@tonic-gate if (idp->d_ino != 0 && offset >= (uint_t)uiop->uio_offset) { 39147c478bd9Sstevel@tonic-gate ushort_t this_reclen = 39157c478bd9Sstevel@tonic-gate DIRENT64_RECLEN(idp->d_namlen); 39167c478bd9Sstevel@tonic-gate /* Buffer too small for any entries */ 39177c478bd9Sstevel@tonic-gate if (!outcount && this_reclen > bufsize) { 39187c478bd9Sstevel@tonic-gate fbrelse(fbp, S_OTHER); 39197c478bd9Sstevel@tonic-gate error = EINVAL; 39207c478bd9Sstevel@tonic-gate goto update_inode; 39217c478bd9Sstevel@tonic-gate } 39227c478bd9Sstevel@tonic-gate /* If would overrun the buffer, quit */ 39237c478bd9Sstevel@tonic-gate if (outcount + this_reclen > bufsize) { 39247c478bd9Sstevel@tonic-gate break; 39257c478bd9Sstevel@tonic-gate } 39267c478bd9Sstevel@tonic-gate /* Take this entry */ 39277c478bd9Sstevel@tonic-gate odp->d_ino = (ino64_t)idp->d_ino; 39287c478bd9Sstevel@tonic-gate odp->d_reclen = (ushort_t)this_reclen; 39297c478bd9Sstevel@tonic-gate odp->d_off = (offset_t)(offset + idp->d_reclen); 39307c478bd9Sstevel@tonic-gate 39317c478bd9Sstevel@tonic-gate /* use strncpy(9f) to zero out uninitialized bytes */ 39327c478bd9Sstevel@tonic-gate 39337c478bd9Sstevel@tonic-gate ASSERT(strlen(idp->d_name) + 1 <= 39347c478bd9Sstevel@tonic-gate DIRENT64_NAMELEN(this_reclen)); 39357c478bd9Sstevel@tonic-gate (void) strncpy(odp->d_name, idp->d_name, 39367c478bd9Sstevel@tonic-gate DIRENT64_NAMELEN(this_reclen)); 39377c478bd9Sstevel@tonic-gate outcount += odp->d_reclen; 393880d34432Sfrankho odp = (struct dirent64 *) 393980d34432Sfrankho ((intptr_t)odp + odp->d_reclen); 39407c478bd9Sstevel@tonic-gate ASSERT(outcount <= bufsize); 39417c478bd9Sstevel@tonic-gate } 39427c478bd9Sstevel@tonic-gate if (idp->d_reclen) { 39437c478bd9Sstevel@tonic-gate incount += idp->d_reclen; 39447c478bd9Sstevel@tonic-gate offset += idp->d_reclen; 39457c478bd9Sstevel@tonic-gate idp = (struct direct *)((intptr_t)idp + idp->d_reclen); 39467c478bd9Sstevel@tonic-gate } else { 39477c478bd9Sstevel@tonic-gate offset = (offset + DIRBLKSIZ) & ~(DIRBLKSIZ-1); 39487c478bd9Sstevel@tonic-gate break; 39497c478bd9Sstevel@tonic-gate } 39507c478bd9Sstevel@tonic-gate } 39517c478bd9Sstevel@tonic-gate /* Release the chunk */ 39527c478bd9Sstevel@tonic-gate fbrelse(fbp, S_OTHER); 39537c478bd9Sstevel@tonic-gate 39547c478bd9Sstevel@tonic-gate /* Read whole block, but got no entries, read another if not eof */ 39557c478bd9Sstevel@tonic-gate 39567c478bd9Sstevel@tonic-gate /* 39577c478bd9Sstevel@tonic-gate * Large Files: casting i_size to int here is not a problem 39587c478bd9Sstevel@tonic-gate * because directory sizes are always less than MAXOFF32_T. 39597c478bd9Sstevel@tonic-gate * See assertion above. 39607c478bd9Sstevel@tonic-gate */ 39617c478bd9Sstevel@tonic-gate 39627c478bd9Sstevel@tonic-gate if (offset < (int)ip->i_size && !outcount) 39637c478bd9Sstevel@tonic-gate goto nextblk; 39647c478bd9Sstevel@tonic-gate 39657c478bd9Sstevel@tonic-gate /* Copy out the entry data */ 39667c478bd9Sstevel@tonic-gate if (uiop->uio_segflg == UIO_SYSSPACE && uiop->uio_iovcnt == 1) { 39677c478bd9Sstevel@tonic-gate iovp->iov_base += outcount; 39687c478bd9Sstevel@tonic-gate iovp->iov_len -= outcount; 39697c478bd9Sstevel@tonic-gate uiop->uio_resid -= outcount; 39707c478bd9Sstevel@tonic-gate uiop->uio_offset = offset; 39717c478bd9Sstevel@tonic-gate } else if ((error = uiomove(outbuf, (long)outcount, UIO_READ, 397280d34432Sfrankho uiop)) == 0) 39737c478bd9Sstevel@tonic-gate uiop->uio_offset = offset; 39747c478bd9Sstevel@tonic-gate update_inode: 39757c478bd9Sstevel@tonic-gate ITIMES(ip); 39767c478bd9Sstevel@tonic-gate if (uiop->uio_segflg != UIO_SYSSPACE || uiop->uio_iovcnt != 1) 39777c478bd9Sstevel@tonic-gate kmem_free(outbuf, bufsize); 39787c478bd9Sstevel@tonic-gate 39797c478bd9Sstevel@tonic-gate if (eofp && error == 0) 39807c478bd9Sstevel@tonic-gate *eofp = (uiop->uio_offset >= (int)ip->i_size); 39817c478bd9Sstevel@tonic-gate unlock: 39827c478bd9Sstevel@tonic-gate if (ulp) { 39837c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 39847c478bd9Sstevel@tonic-gate } 39857c478bd9Sstevel@tonic-gate out: 39867c478bd9Sstevel@tonic-gate return (error); 39877c478bd9Sstevel@tonic-gate } 39887c478bd9Sstevel@tonic-gate 39897c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 39907c478bd9Sstevel@tonic-gate static int 399180d5689fSPatrick Mooney ufs_symlink(struct vnode *dvp, char *linkname, struct vattr *vap, char *target, 399280d5689fSPatrick Mooney struct cred *cr, caller_context_t *ct, int flags) 39937c478bd9Sstevel@tonic-gate { 39947c478bd9Sstevel@tonic-gate struct inode *ip, *dip = VTOI(dvp); 39957c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = dip->i_ufsvfs; 39967c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 39977c478bd9Sstevel@tonic-gate int error; 39987c478bd9Sstevel@tonic-gate int issync; 39997c478bd9Sstevel@tonic-gate int trans_size; 40007c478bd9Sstevel@tonic-gate int residual; 40017c478bd9Sstevel@tonic-gate int ioflag; 40027c478bd9Sstevel@tonic-gate int retry = 1; 40037c478bd9Sstevel@tonic-gate 40047c478bd9Sstevel@tonic-gate /* 40057c478bd9Sstevel@tonic-gate * No symlinks in attrdirs at this time 40067c478bd9Sstevel@tonic-gate */ 40077c478bd9Sstevel@tonic-gate if ((VTOI(dvp)->i_mode & IFMT) == IFATTRDIR) 40087c478bd9Sstevel@tonic-gate return (EINVAL); 40097c478bd9Sstevel@tonic-gate 40107c478bd9Sstevel@tonic-gate again: 40117c478bd9Sstevel@tonic-gate ip = (struct inode *)NULL; 40127c478bd9Sstevel@tonic-gate vap->va_type = VLNK; 40137c478bd9Sstevel@tonic-gate vap->va_rdev = 0; 40147c478bd9Sstevel@tonic-gate 40157c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_SYMLINK_MASK); 40167c478bd9Sstevel@tonic-gate if (error) 40177c478bd9Sstevel@tonic-gate goto out; 40187c478bd9Sstevel@tonic-gate 40197c478bd9Sstevel@tonic-gate if (ulp) 40207c478bd9Sstevel@tonic-gate TRANS_BEGIN_CSYNC(ufsvfsp, issync, TOP_SYMLINK, 40217c478bd9Sstevel@tonic-gate trans_size = (int)TOP_SYMLINK_SIZE(dip)); 40227c478bd9Sstevel@tonic-gate 40237c478bd9Sstevel@tonic-gate /* 40247c478bd9Sstevel@tonic-gate * We must create the inode before the directory entry, to avoid 40257c478bd9Sstevel@tonic-gate * racing with readlink(). ufs_dirmakeinode requires that we 40267c478bd9Sstevel@tonic-gate * hold the quota lock as reader, and directory locks as writer. 40277c478bd9Sstevel@tonic-gate */ 40287c478bd9Sstevel@tonic-gate 40297c478bd9Sstevel@tonic-gate rw_enter(&dip->i_rwlock, RW_WRITER); 40307c478bd9Sstevel@tonic-gate rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 40317c478bd9Sstevel@tonic-gate rw_enter(&dip->i_contents, RW_WRITER); 40327c478bd9Sstevel@tonic-gate 40337c478bd9Sstevel@tonic-gate /* 40347c478bd9Sstevel@tonic-gate * Suppress any out of inodes messages if we will retry on 40357c478bd9Sstevel@tonic-gate * ENOSP 40367c478bd9Sstevel@tonic-gate */ 40377c478bd9Sstevel@tonic-gate if (retry) 40387c478bd9Sstevel@tonic-gate dip->i_flag |= IQUIET; 40397c478bd9Sstevel@tonic-gate 40407c478bd9Sstevel@tonic-gate error = ufs_dirmakeinode(dip, &ip, vap, DE_SYMLINK, cr); 40417c478bd9Sstevel@tonic-gate 40427c478bd9Sstevel@tonic-gate dip->i_flag &= ~IQUIET; 40437c478bd9Sstevel@tonic-gate 40447c478bd9Sstevel@tonic-gate rw_exit(&dip->i_contents); 40457c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 40467c478bd9Sstevel@tonic-gate rw_exit(&dip->i_rwlock); 40477c478bd9Sstevel@tonic-gate 40487c478bd9Sstevel@tonic-gate if (error) 40497c478bd9Sstevel@tonic-gate goto unlock; 40507c478bd9Sstevel@tonic-gate 40517c478bd9Sstevel@tonic-gate /* 40527c478bd9Sstevel@tonic-gate * OK. The inode has been created. Write out the data of the 40537c478bd9Sstevel@tonic-gate * symbolic link. Since symbolic links are metadata, and should 40547c478bd9Sstevel@tonic-gate * remain consistent across a system crash, we need to force the 40557c478bd9Sstevel@tonic-gate * data out synchronously. 40567c478bd9Sstevel@tonic-gate * 40577c478bd9Sstevel@tonic-gate * (This is a change from the semantics in earlier releases, which 40587c478bd9Sstevel@tonic-gate * only created symbolic links synchronously if the semi-documented 40597c478bd9Sstevel@tonic-gate * 'syncdir' option was set, or if we were being invoked by the NFS 40607c478bd9Sstevel@tonic-gate * server, which requires symbolic links to be created synchronously.) 40617c478bd9Sstevel@tonic-gate * 40627c478bd9Sstevel@tonic-gate * We need to pass in a pointer for the residual length; otherwise 40637c478bd9Sstevel@tonic-gate * ufs_rdwri() will always return EIO if it can't write the data, 40647c478bd9Sstevel@tonic-gate * even if the error was really ENOSPC or EDQUOT. 40657c478bd9Sstevel@tonic-gate */ 40667c478bd9Sstevel@tonic-gate 40677c478bd9Sstevel@tonic-gate ioflag = FWRITE | FDSYNC; 40687c478bd9Sstevel@tonic-gate residual = 0; 40697c478bd9Sstevel@tonic-gate 40707c478bd9Sstevel@tonic-gate rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 40717c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 40727c478bd9Sstevel@tonic-gate 40737c478bd9Sstevel@tonic-gate /* 40747c478bd9Sstevel@tonic-gate * Suppress file system full messages if we will retry 40757c478bd9Sstevel@tonic-gate */ 40767c478bd9Sstevel@tonic-gate if (retry) 40777c478bd9Sstevel@tonic-gate ip->i_flag |= IQUIET; 40787c478bd9Sstevel@tonic-gate 40797c478bd9Sstevel@tonic-gate error = ufs_rdwri(UIO_WRITE, ioflag, ip, target, strlen(target), 40807c478bd9Sstevel@tonic-gate (offset_t)0, UIO_SYSSPACE, &residual, cr); 40817c478bd9Sstevel@tonic-gate 40827c478bd9Sstevel@tonic-gate ip->i_flag &= ~IQUIET; 40837c478bd9Sstevel@tonic-gate 40847c478bd9Sstevel@tonic-gate if (error) { 40857c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 40867c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 40877c478bd9Sstevel@tonic-gate goto remove; 40887c478bd9Sstevel@tonic-gate } 40897c478bd9Sstevel@tonic-gate 40907c478bd9Sstevel@tonic-gate /* 40917c478bd9Sstevel@tonic-gate * If the link's data is small enough, we can cache it in the inode. 40927c478bd9Sstevel@tonic-gate * This is a "fast symbolic link". We don't use the first direct 40937c478bd9Sstevel@tonic-gate * block because that's actually used to point at the symbolic link's 40947c478bd9Sstevel@tonic-gate * contents on disk; but we know that none of the other direct or 40957c478bd9Sstevel@tonic-gate * indirect blocks can be used because symbolic links are restricted 40967c478bd9Sstevel@tonic-gate * to be smaller than a file system block. 40977c478bd9Sstevel@tonic-gate */ 40987c478bd9Sstevel@tonic-gate 40997c478bd9Sstevel@tonic-gate ASSERT(MAXPATHLEN <= VBSIZE(ITOV(ip))); 41007c478bd9Sstevel@tonic-gate 41017c478bd9Sstevel@tonic-gate if (ip->i_size > 0 && ip->i_size <= FSL_SIZE) { 41027c478bd9Sstevel@tonic-gate if (kcopy(target, &ip->i_db[1], ip->i_size) == 0) { 41037c478bd9Sstevel@tonic-gate ip->i_flag |= IFASTSYMLNK; 41047c478bd9Sstevel@tonic-gate } else { 41057c478bd9Sstevel@tonic-gate int i; 41067c478bd9Sstevel@tonic-gate /* error, clear garbage left behind */ 41077c478bd9Sstevel@tonic-gate for (i = 1; i < NDADDR; i++) 41087c478bd9Sstevel@tonic-gate ip->i_db[i] = 0; 41097c478bd9Sstevel@tonic-gate for (i = 0; i < NIADDR; i++) 41107c478bd9Sstevel@tonic-gate ip->i_ib[i] = 0; 41117c478bd9Sstevel@tonic-gate } 41127c478bd9Sstevel@tonic-gate } 41137c478bd9Sstevel@tonic-gate 41147c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 41157c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 41167c478bd9Sstevel@tonic-gate 41177c478bd9Sstevel@tonic-gate /* 41187c478bd9Sstevel@tonic-gate * OK. We've successfully created the symbolic link. All that 41197c478bd9Sstevel@tonic-gate * remains is to insert it into the appropriate directory. 41207c478bd9Sstevel@tonic-gate */ 41217c478bd9Sstevel@tonic-gate 41227c478bd9Sstevel@tonic-gate rw_enter(&dip->i_rwlock, RW_WRITER); 41239b5097eeSOwen Roberts error = ufs_direnter_lr(dip, linkname, DE_SYMLINK, NULL, ip, cr); 41247c478bd9Sstevel@tonic-gate rw_exit(&dip->i_rwlock); 41257c478bd9Sstevel@tonic-gate 41267c478bd9Sstevel@tonic-gate /* 41277c478bd9Sstevel@tonic-gate * Fall through into remove-on-error code. We're either done, or we 41287c478bd9Sstevel@tonic-gate * need to remove the inode (if we couldn't insert it). 41297c478bd9Sstevel@tonic-gate */ 41307c478bd9Sstevel@tonic-gate 41317c478bd9Sstevel@tonic-gate remove: 41327c478bd9Sstevel@tonic-gate if (error && (ip != NULL)) { 41337c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 41347c478bd9Sstevel@tonic-gate ip->i_nlink--; 41357c478bd9Sstevel@tonic-gate ip->i_flag |= ICHG; 41367c478bd9Sstevel@tonic-gate ip->i_seq++; 41377c478bd9Sstevel@tonic-gate ufs_setreclaim(ip); 41387c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 41397c478bd9Sstevel@tonic-gate } 41407c478bd9Sstevel@tonic-gate 41417c478bd9Sstevel@tonic-gate unlock: 41427c478bd9Sstevel@tonic-gate if (ip != NULL) 41437c478bd9Sstevel@tonic-gate VN_RELE(ITOV(ip)); 41447c478bd9Sstevel@tonic-gate 41457c478bd9Sstevel@tonic-gate if (ulp) { 41467c478bd9Sstevel@tonic-gate int terr = 0; 41477c478bd9Sstevel@tonic-gate 41487c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, terr, issync, TOP_SYMLINK, 414980d34432Sfrankho trans_size); 41507c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 41517c478bd9Sstevel@tonic-gate if (error == 0) 41527c478bd9Sstevel@tonic-gate error = terr; 41537c478bd9Sstevel@tonic-gate } 41547c478bd9Sstevel@tonic-gate 41557c478bd9Sstevel@tonic-gate /* 41567c478bd9Sstevel@tonic-gate * We may have failed due to lack of an inode or of a block to 41577c478bd9Sstevel@tonic-gate * store the target in. Try flushing the delete queue to free 41587c478bd9Sstevel@tonic-gate * logically-available things up and try again. 41597c478bd9Sstevel@tonic-gate */ 41607c478bd9Sstevel@tonic-gate if ((error == ENOSPC) && retry && TRANS_ISTRANS(ufsvfsp)) { 41617c478bd9Sstevel@tonic-gate ufs_delete_drain_wait(ufsvfsp, 1); 41627c478bd9Sstevel@tonic-gate retry = 0; 41637c478bd9Sstevel@tonic-gate goto again; 41647c478bd9Sstevel@tonic-gate } 41657c478bd9Sstevel@tonic-gate 41667c478bd9Sstevel@tonic-gate out: 41677c478bd9Sstevel@tonic-gate return (error); 41687c478bd9Sstevel@tonic-gate } 41697c478bd9Sstevel@tonic-gate 41707c478bd9Sstevel@tonic-gate /* 41717c478bd9Sstevel@tonic-gate * Ufs specific routine used to do ufs io. 41727c478bd9Sstevel@tonic-gate */ 41737c478bd9Sstevel@tonic-gate int 41747c478bd9Sstevel@tonic-gate ufs_rdwri(enum uio_rw rw, int ioflag, struct inode *ip, caddr_t base, 417580d5689fSPatrick Mooney ssize_t len, offset_t offset, enum uio_seg seg, int *aresid, 417680d5689fSPatrick Mooney struct cred *cr) 41777c478bd9Sstevel@tonic-gate { 41787c478bd9Sstevel@tonic-gate struct uio auio; 41797c478bd9Sstevel@tonic-gate struct iovec aiov; 41807c478bd9Sstevel@tonic-gate int error; 41817c478bd9Sstevel@tonic-gate 41827c478bd9Sstevel@tonic-gate ASSERT(RW_LOCK_HELD(&ip->i_contents)); 41837c478bd9Sstevel@tonic-gate 41847c478bd9Sstevel@tonic-gate bzero((caddr_t)&auio, sizeof (uio_t)); 41857c478bd9Sstevel@tonic-gate bzero((caddr_t)&aiov, sizeof (iovec_t)); 41867c478bd9Sstevel@tonic-gate 41877c478bd9Sstevel@tonic-gate aiov.iov_base = base; 41887c478bd9Sstevel@tonic-gate aiov.iov_len = len; 41897c478bd9Sstevel@tonic-gate auio.uio_iov = &aiov; 41907c478bd9Sstevel@tonic-gate auio.uio_iovcnt = 1; 41917c478bd9Sstevel@tonic-gate auio.uio_loffset = offset; 41927c478bd9Sstevel@tonic-gate auio.uio_segflg = (short)seg; 41937c478bd9Sstevel@tonic-gate auio.uio_resid = len; 41947c478bd9Sstevel@tonic-gate 41957c478bd9Sstevel@tonic-gate if (rw == UIO_WRITE) { 41967c478bd9Sstevel@tonic-gate auio.uio_fmode = FWRITE; 41977c478bd9Sstevel@tonic-gate auio.uio_extflg = UIO_COPY_DEFAULT; 41987c478bd9Sstevel@tonic-gate auio.uio_llimit = curproc->p_fsz_ctl; 41997c478bd9Sstevel@tonic-gate error = wrip(ip, &auio, ioflag, cr); 42007c478bd9Sstevel@tonic-gate } else { 42017c478bd9Sstevel@tonic-gate auio.uio_fmode = FREAD; 42027c478bd9Sstevel@tonic-gate auio.uio_extflg = UIO_COPY_CACHED; 42037c478bd9Sstevel@tonic-gate auio.uio_llimit = MAXOFFSET_T; 42047c478bd9Sstevel@tonic-gate error = rdip(ip, &auio, ioflag, cr); 42057c478bd9Sstevel@tonic-gate } 42067c478bd9Sstevel@tonic-gate 42077c478bd9Sstevel@tonic-gate if (aresid) { 42087c478bd9Sstevel@tonic-gate *aresid = auio.uio_resid; 42097c478bd9Sstevel@tonic-gate } else if (auio.uio_resid) { 42107c478bd9Sstevel@tonic-gate error = EIO; 42117c478bd9Sstevel@tonic-gate } 42127c478bd9Sstevel@tonic-gate return (error); 42137c478bd9Sstevel@tonic-gate } 42147c478bd9Sstevel@tonic-gate 4215da6c28aaSamw /*ARGSUSED*/ 42167c478bd9Sstevel@tonic-gate static int 4217da6c28aaSamw ufs_fid(struct vnode *vp, struct fid *fidp, caller_context_t *ct) 42187c478bd9Sstevel@tonic-gate { 42197c478bd9Sstevel@tonic-gate struct ufid *ufid; 42207c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 42217c478bd9Sstevel@tonic-gate 42227c478bd9Sstevel@tonic-gate if (ip->i_ufsvfs == NULL) 42237c478bd9Sstevel@tonic-gate return (EIO); 42247c478bd9Sstevel@tonic-gate 42257c478bd9Sstevel@tonic-gate if (fidp->fid_len < (sizeof (struct ufid) - sizeof (ushort_t))) { 42267c478bd9Sstevel@tonic-gate fidp->fid_len = sizeof (struct ufid) - sizeof (ushort_t); 42277c478bd9Sstevel@tonic-gate return (ENOSPC); 42287c478bd9Sstevel@tonic-gate } 42297c478bd9Sstevel@tonic-gate 42307c478bd9Sstevel@tonic-gate ufid = (struct ufid *)fidp; 42317c478bd9Sstevel@tonic-gate bzero((char *)ufid, sizeof (struct ufid)); 42327c478bd9Sstevel@tonic-gate ufid->ufid_len = sizeof (struct ufid) - sizeof (ushort_t); 42337c478bd9Sstevel@tonic-gate ufid->ufid_ino = ip->i_number; 42347c478bd9Sstevel@tonic-gate ufid->ufid_gen = ip->i_gen; 42357c478bd9Sstevel@tonic-gate 42367c478bd9Sstevel@tonic-gate return (0); 42377c478bd9Sstevel@tonic-gate } 42387c478bd9Sstevel@tonic-gate 42397c478bd9Sstevel@tonic-gate /* ARGSUSED2 */ 42407c478bd9Sstevel@tonic-gate static int 42417c478bd9Sstevel@tonic-gate ufs_rwlock(struct vnode *vp, int write_lock, caller_context_t *ctp) 42427c478bd9Sstevel@tonic-gate { 42437c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 42447c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 42457c478bd9Sstevel@tonic-gate int forcedirectio; 42467c478bd9Sstevel@tonic-gate 42477c478bd9Sstevel@tonic-gate /* 42487c478bd9Sstevel@tonic-gate * Read case is easy. 42497c478bd9Sstevel@tonic-gate */ 42507c478bd9Sstevel@tonic-gate if (!write_lock) { 42517c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_READER); 42527c478bd9Sstevel@tonic-gate return (V_WRITELOCK_FALSE); 42537c478bd9Sstevel@tonic-gate } 42547c478bd9Sstevel@tonic-gate 42557c478bd9Sstevel@tonic-gate /* 42567c478bd9Sstevel@tonic-gate * Caller has requested a writer lock, but that inhibits any 42577c478bd9Sstevel@tonic-gate * concurrency in the VOPs that follow. Acquire the lock shared 42587c478bd9Sstevel@tonic-gate * and defer exclusive access until it is known to be needed in 42597c478bd9Sstevel@tonic-gate * other VOP handlers. Some cases can be determined here. 42607c478bd9Sstevel@tonic-gate */ 42617c478bd9Sstevel@tonic-gate 42627c478bd9Sstevel@tonic-gate /* 42637c478bd9Sstevel@tonic-gate * If directio is not set, there is no chance of concurrency, 42647c478bd9Sstevel@tonic-gate * so just acquire the lock exclusive. Beware of a forced 42657c478bd9Sstevel@tonic-gate * unmount before looking at the mount option. 42667c478bd9Sstevel@tonic-gate */ 42677c478bd9Sstevel@tonic-gate ufsvfsp = ip->i_ufsvfs; 42687c478bd9Sstevel@tonic-gate forcedirectio = ufsvfsp ? ufsvfsp->vfs_forcedirectio : 0; 42697c478bd9Sstevel@tonic-gate if (!(ip->i_flag & IDIRECTIO || forcedirectio) || 42707c478bd9Sstevel@tonic-gate !ufs_allow_shared_writes) { 42717c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_WRITER); 42727c478bd9Sstevel@tonic-gate return (V_WRITELOCK_TRUE); 42737c478bd9Sstevel@tonic-gate } 42747c478bd9Sstevel@tonic-gate 42757c478bd9Sstevel@tonic-gate /* 42767c478bd9Sstevel@tonic-gate * Mandatory locking forces acquiring i_rwlock exclusive. 42777c478bd9Sstevel@tonic-gate */ 42787c478bd9Sstevel@tonic-gate if (MANDLOCK(vp, ip->i_mode)) { 42797c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_WRITER); 42807c478bd9Sstevel@tonic-gate return (V_WRITELOCK_TRUE); 42817c478bd9Sstevel@tonic-gate } 42827c478bd9Sstevel@tonic-gate 42837c478bd9Sstevel@tonic-gate /* 42847c478bd9Sstevel@tonic-gate * Acquire the lock shared in case a concurrent write follows. 42857c478bd9Sstevel@tonic-gate * Mandatory locking could have become enabled before the lock 42867c478bd9Sstevel@tonic-gate * was acquired. Re-check and upgrade if needed. 42877c478bd9Sstevel@tonic-gate */ 42887c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_READER); 42897c478bd9Sstevel@tonic-gate if (MANDLOCK(vp, ip->i_mode)) { 42907c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 42917c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_WRITER); 42927c478bd9Sstevel@tonic-gate return (V_WRITELOCK_TRUE); 42937c478bd9Sstevel@tonic-gate } 42947c478bd9Sstevel@tonic-gate return (V_WRITELOCK_FALSE); 42957c478bd9Sstevel@tonic-gate } 42967c478bd9Sstevel@tonic-gate 42977c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 42987c478bd9Sstevel@tonic-gate static void 42997c478bd9Sstevel@tonic-gate ufs_rwunlock(struct vnode *vp, int write_lock, caller_context_t *ctp) 43007c478bd9Sstevel@tonic-gate { 43017c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 43027c478bd9Sstevel@tonic-gate 43037c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 43047c478bd9Sstevel@tonic-gate } 43057c478bd9Sstevel@tonic-gate 43067c478bd9Sstevel@tonic-gate /* ARGSUSED */ 43077c478bd9Sstevel@tonic-gate static int 430880d5689fSPatrick Mooney ufs_seek(struct vnode *vp, offset_t ooff, offset_t *noffp, caller_context_t *ct) 43097c478bd9Sstevel@tonic-gate { 43107c478bd9Sstevel@tonic-gate return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 43117c478bd9Sstevel@tonic-gate } 43127c478bd9Sstevel@tonic-gate 43137c478bd9Sstevel@tonic-gate /* ARGSUSED */ 43147c478bd9Sstevel@tonic-gate static int 43157c478bd9Sstevel@tonic-gate ufs_frlock(struct vnode *vp, int cmd, struct flock64 *bfp, int flag, 431680d5689fSPatrick Mooney offset_t offset, struct flk_callback *flk_cbp, struct cred *cr, 431780d5689fSPatrick Mooney caller_context_t *ct) 43187c478bd9Sstevel@tonic-gate { 43197c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 43207c478bd9Sstevel@tonic-gate 43217c478bd9Sstevel@tonic-gate if (ip->i_ufsvfs == NULL) 43227c478bd9Sstevel@tonic-gate return (EIO); 43237c478bd9Sstevel@tonic-gate 43247c478bd9Sstevel@tonic-gate /* 43257c478bd9Sstevel@tonic-gate * If file is being mapped, disallow frlock. 43267c478bd9Sstevel@tonic-gate * XXX I am not holding tlock while checking i_mapcnt because the 43277c478bd9Sstevel@tonic-gate * current locking strategy drops all locks before calling fs_frlock. 43287c478bd9Sstevel@tonic-gate * So, mapcnt could change before we enter fs_frlock making is 43297c478bd9Sstevel@tonic-gate * meaningless to have held tlock in the first place. 43307c478bd9Sstevel@tonic-gate */ 43317c478bd9Sstevel@tonic-gate if (ip->i_mapcnt > 0 && MANDLOCK(vp, ip->i_mode)) 43327c478bd9Sstevel@tonic-gate return (EAGAIN); 4333da6c28aaSamw return (fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct)); 43347c478bd9Sstevel@tonic-gate } 43357c478bd9Sstevel@tonic-gate 43367c478bd9Sstevel@tonic-gate /* ARGSUSED */ 43377c478bd9Sstevel@tonic-gate static int 4338303bf60bSsdebnath ufs_space(struct vnode *vp, int cmd, struct flock64 *bfp, int flag, 433980d5689fSPatrick Mooney offset_t offset, cred_t *cr, caller_context_t *ct) 43407c478bd9Sstevel@tonic-gate { 4341303bf60bSsdebnath struct ufsvfs *ufsvfsp = VTOI(vp)->i_ufsvfs; 43427c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 43437c478bd9Sstevel@tonic-gate int error; 43447c478bd9Sstevel@tonic-gate 4345303bf60bSsdebnath if ((error = convoff(vp, bfp, 0, offset)) == 0) { 4346303bf60bSsdebnath if (cmd == F_FREESP) { 4347303bf60bSsdebnath error = ufs_lockfs_begin(ufsvfsp, &ulp, 4348303bf60bSsdebnath ULOCKFS_SPACE_MASK); 4349303bf60bSsdebnath if (error) 4350303bf60bSsdebnath return (error); 4351303bf60bSsdebnath error = ufs_freesp(vp, bfp, flag, cr); 435272102e74SBryan Cantrill 435372102e74SBryan Cantrill if (error == 0 && bfp->l_start == 0) 435472102e74SBryan Cantrill vnevent_truncate(vp, ct); 4355303bf60bSsdebnath } else if (cmd == F_ALLOCSP) { 4356303bf60bSsdebnath error = ufs_lockfs_begin(ufsvfsp, &ulp, 4357303bf60bSsdebnath ULOCKFS_FALLOCATE_MASK); 4358303bf60bSsdebnath if (error) 4359303bf60bSsdebnath return (error); 4360303bf60bSsdebnath error = ufs_allocsp(vp, bfp, cr); 4361303bf60bSsdebnath } else 4362303bf60bSsdebnath return (EINVAL); /* Command not handled here */ 43637c478bd9Sstevel@tonic-gate 4364303bf60bSsdebnath if (ulp) 4365303bf60bSsdebnath ufs_lockfs_end(ulp); 43667c478bd9Sstevel@tonic-gate 4367303bf60bSsdebnath } 43687c478bd9Sstevel@tonic-gate return (error); 43697c478bd9Sstevel@tonic-gate } 43707c478bd9Sstevel@tonic-gate 43717c478bd9Sstevel@tonic-gate /* 43727c478bd9Sstevel@tonic-gate * Used to determine if read ahead should be done. Also used to 43737c478bd9Sstevel@tonic-gate * to determine when write back occurs. 43747c478bd9Sstevel@tonic-gate */ 43757c478bd9Sstevel@tonic-gate #define CLUSTSZ(ip) ((ip)->i_ufsvfs->vfs_ioclustsz) 43767c478bd9Sstevel@tonic-gate 43777c478bd9Sstevel@tonic-gate /* 43787c478bd9Sstevel@tonic-gate * A faster version of ufs_getpage. 43797c478bd9Sstevel@tonic-gate * 43807c478bd9Sstevel@tonic-gate * We optimize by inlining the pvn_getpages iterator, eliminating 43817c478bd9Sstevel@tonic-gate * calls to bmap_read if file doesn't have UFS holes, and avoiding 43827c478bd9Sstevel@tonic-gate * the overhead of page_exists(). 43837c478bd9Sstevel@tonic-gate * 43847c478bd9Sstevel@tonic-gate * When files has UFS_HOLES and ufs_getpage is called with S_READ, 43857c478bd9Sstevel@tonic-gate * we set *protp to PROT_READ to avoid calling bmap_read. This approach 43867c478bd9Sstevel@tonic-gate * victimizes performance when a file with UFS holes is faulted 43877c478bd9Sstevel@tonic-gate * first in the S_READ mode, and then in the S_WRITE mode. We will get 43887c478bd9Sstevel@tonic-gate * two MMU faults in this case. 43897c478bd9Sstevel@tonic-gate * 43907c478bd9Sstevel@tonic-gate * XXX - the inode fields which control the sequential mode are not 43917c478bd9Sstevel@tonic-gate * protected by any mutex. The read ahead will act wild if 43927c478bd9Sstevel@tonic-gate * multiple processes will access the file concurrently and 43937c478bd9Sstevel@tonic-gate * some of them in sequential mode. One particulary bad case 43947c478bd9Sstevel@tonic-gate * is if another thread will change the value of i_nextrio between 43957c478bd9Sstevel@tonic-gate * the time this thread tests the i_nextrio value and then reads it 43967c478bd9Sstevel@tonic-gate * again to use it as the offset for the read ahead. 43977c478bd9Sstevel@tonic-gate */ 4398da6c28aaSamw /*ARGSUSED*/ 43997c478bd9Sstevel@tonic-gate static int 44007c478bd9Sstevel@tonic-gate ufs_getpage(struct vnode *vp, offset_t off, size_t len, uint_t *protp, 440180d5689fSPatrick Mooney page_t *plarr[], size_t plsz, struct seg *seg, caddr_t addr, 440280d5689fSPatrick Mooney enum seg_rw rw, struct cred *cr, caller_context_t *ct) 44037c478bd9Sstevel@tonic-gate { 44047c478bd9Sstevel@tonic-gate u_offset_t uoff = (u_offset_t)off; /* type conversion */ 44057c478bd9Sstevel@tonic-gate u_offset_t pgoff; 44067c478bd9Sstevel@tonic-gate u_offset_t eoff; 4407*2575b441SToomas Soome struct inode *ip = VTOI(vp); 44087c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = ip->i_ufsvfs; 4409*2575b441SToomas Soome struct fs *fs; 44107c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 44117c478bd9Sstevel@tonic-gate page_t **pl; 44127c478bd9Sstevel@tonic-gate caddr_t pgaddr; 44137c478bd9Sstevel@tonic-gate krw_t rwtype; 4414*2575b441SToomas Soome int err; 44157c478bd9Sstevel@tonic-gate int has_holes; 44167c478bd9Sstevel@tonic-gate int beyond_eof; 44177c478bd9Sstevel@tonic-gate int seqmode; 44187c478bd9Sstevel@tonic-gate int pgsize = PAGESIZE; 44197c478bd9Sstevel@tonic-gate int dolock; 44207c478bd9Sstevel@tonic-gate int do_qlock; 44217c478bd9Sstevel@tonic-gate int trans_size; 44227c478bd9Sstevel@tonic-gate 44237c478bd9Sstevel@tonic-gate ASSERT((uoff & PAGEOFFSET) == 0); 44247c478bd9Sstevel@tonic-gate 44257c478bd9Sstevel@tonic-gate if (protp) 44267c478bd9Sstevel@tonic-gate *protp = PROT_ALL; 44277c478bd9Sstevel@tonic-gate 44287c478bd9Sstevel@tonic-gate /* 44297c478bd9Sstevel@tonic-gate * Obey the lockfs protocol 44307c478bd9Sstevel@tonic-gate */ 44317c478bd9Sstevel@tonic-gate err = ufs_lockfs_begin_getpage(ufsvfsp, &ulp, seg, 443280d34432Sfrankho rw == S_READ || rw == S_EXEC, protp); 44337c478bd9Sstevel@tonic-gate if (err) 44347c478bd9Sstevel@tonic-gate goto out; 44357c478bd9Sstevel@tonic-gate 44367c478bd9Sstevel@tonic-gate fs = ufsvfsp->vfs_fs; 44377c478bd9Sstevel@tonic-gate 44387c478bd9Sstevel@tonic-gate if (ulp && (rw == S_CREATE || rw == S_WRITE) && 44397c478bd9Sstevel@tonic-gate !(vp->v_flag & VISSWAP)) { 44407c478bd9Sstevel@tonic-gate /* 44417c478bd9Sstevel@tonic-gate * Try to start a transaction, will return if blocking is 44427c478bd9Sstevel@tonic-gate * expected to occur and the address space is not the 44437c478bd9Sstevel@tonic-gate * kernel address space. 44447c478bd9Sstevel@tonic-gate */ 44457c478bd9Sstevel@tonic-gate trans_size = TOP_GETPAGE_SIZE(ip); 44467c478bd9Sstevel@tonic-gate if (seg->s_as != &kas) { 44477c478bd9Sstevel@tonic-gate TRANS_TRY_BEGIN_ASYNC(ufsvfsp, TOP_GETPAGE, 444880d34432Sfrankho trans_size, err) 44497c478bd9Sstevel@tonic-gate if (err == EWOULDBLOCK) { 44507c478bd9Sstevel@tonic-gate /* 44517c478bd9Sstevel@tonic-gate * Use EDEADLK here because the VM code 44527c478bd9Sstevel@tonic-gate * can normally never see this error. 44537c478bd9Sstevel@tonic-gate */ 44547c478bd9Sstevel@tonic-gate err = EDEADLK; 44557c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 44567c478bd9Sstevel@tonic-gate goto out; 44577c478bd9Sstevel@tonic-gate } 44587c478bd9Sstevel@tonic-gate } else { 44597c478bd9Sstevel@tonic-gate TRANS_BEGIN_ASYNC(ufsvfsp, TOP_GETPAGE, trans_size); 44607c478bd9Sstevel@tonic-gate } 44617c478bd9Sstevel@tonic-gate } 44627c478bd9Sstevel@tonic-gate 44637c478bd9Sstevel@tonic-gate if (vp->v_flag & VNOMAP) { 44647c478bd9Sstevel@tonic-gate err = ENOSYS; 44657c478bd9Sstevel@tonic-gate goto unlock; 44667c478bd9Sstevel@tonic-gate } 44677c478bd9Sstevel@tonic-gate 44687c478bd9Sstevel@tonic-gate seqmode = ip->i_nextr == uoff && rw != S_CREATE; 44697c478bd9Sstevel@tonic-gate 44707c478bd9Sstevel@tonic-gate rwtype = RW_READER; /* start as a reader */ 44717c478bd9Sstevel@tonic-gate dolock = (rw_owner(&ip->i_contents) != curthread); 44727c478bd9Sstevel@tonic-gate /* 44737c478bd9Sstevel@tonic-gate * If this thread owns the lock, i.e., this thread grabbed it 44747c478bd9Sstevel@tonic-gate * as writer somewhere above, then we don't need to grab the 44757c478bd9Sstevel@tonic-gate * lock as reader in this routine. 44767c478bd9Sstevel@tonic-gate */ 44777c478bd9Sstevel@tonic-gate do_qlock = (rw_owner(&ufsvfsp->vfs_dqrwlock) != curthread); 44787c478bd9Sstevel@tonic-gate 44797c478bd9Sstevel@tonic-gate retrylock: 44807c478bd9Sstevel@tonic-gate if (dolock) { 44817c478bd9Sstevel@tonic-gate /* 44827c478bd9Sstevel@tonic-gate * Grab the quota lock if we need to call 44837c478bd9Sstevel@tonic-gate * bmap_write() below (with i_contents as writer). 44847c478bd9Sstevel@tonic-gate */ 44857c478bd9Sstevel@tonic-gate if (do_qlock && rwtype == RW_WRITER) 44867c478bd9Sstevel@tonic-gate rw_enter(&ufsvfsp->vfs_dqrwlock, RW_READER); 44877c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, rwtype); 44887c478bd9Sstevel@tonic-gate } 44897c478bd9Sstevel@tonic-gate 44907c478bd9Sstevel@tonic-gate /* 44917c478bd9Sstevel@tonic-gate * We may be getting called as a side effect of a bmap using 44927c478bd9Sstevel@tonic-gate * fbread() when the blocks might be being allocated and the 44937c478bd9Sstevel@tonic-gate * size has not yet been up'ed. In this case we want to be 44947c478bd9Sstevel@tonic-gate * able to return zero pages if we get back UFS_HOLE from 44957c478bd9Sstevel@tonic-gate * calling bmap for a non write case here. We also might have 44967c478bd9Sstevel@tonic-gate * to read some frags from the disk into a page if we are 44977c478bd9Sstevel@tonic-gate * extending the number of frags for a given lbn in bmap(). 44987c478bd9Sstevel@tonic-gate * Large Files: The read of i_size here is atomic because 44997c478bd9Sstevel@tonic-gate * i_contents is held here. If dolock is zero, the lock 45007c478bd9Sstevel@tonic-gate * is held in bmap routines. 45017c478bd9Sstevel@tonic-gate */ 4502120107ddSmc beyond_eof = uoff + len > 4503bcfec3c7Smc P2ROUNDUP_TYPED(ip->i_size, PAGESIZE, u_offset_t); 45047c478bd9Sstevel@tonic-gate if (beyond_eof && seg != segkmap) { 45057c478bd9Sstevel@tonic-gate if (dolock) { 45067c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 45077c478bd9Sstevel@tonic-gate if (do_qlock && rwtype == RW_WRITER) 45087c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 45097c478bd9Sstevel@tonic-gate } 45107c478bd9Sstevel@tonic-gate err = EFAULT; 45117c478bd9Sstevel@tonic-gate goto unlock; 45127c478bd9Sstevel@tonic-gate } 45137c478bd9Sstevel@tonic-gate 45147c478bd9Sstevel@tonic-gate /* 45157c478bd9Sstevel@tonic-gate * Must hold i_contents lock throughout the call to pvn_getpages 45167c478bd9Sstevel@tonic-gate * since locked pages are returned from each call to ufs_getapage. 45177c478bd9Sstevel@tonic-gate * Must *not* return locked pages and then try for contents lock 45187c478bd9Sstevel@tonic-gate * due to lock ordering requirements (inode > page) 45197c478bd9Sstevel@tonic-gate */ 45207c478bd9Sstevel@tonic-gate 45217c478bd9Sstevel@tonic-gate has_holes = bmap_has_holes(ip); 45227c478bd9Sstevel@tonic-gate 45237c478bd9Sstevel@tonic-gate if ((rw == S_WRITE || rw == S_CREATE) && has_holes && !beyond_eof) { 45247c478bd9Sstevel@tonic-gate int blk_size; 45257c478bd9Sstevel@tonic-gate u_offset_t offset; 45267c478bd9Sstevel@tonic-gate 45277c478bd9Sstevel@tonic-gate /* 45287c478bd9Sstevel@tonic-gate * We must acquire the RW_WRITER lock in order to 45297c478bd9Sstevel@tonic-gate * call bmap_write(). 45307c478bd9Sstevel@tonic-gate */ 45317c478bd9Sstevel@tonic-gate if (dolock && rwtype == RW_READER) { 45327c478bd9Sstevel@tonic-gate rwtype = RW_WRITER; 45337c478bd9Sstevel@tonic-gate 45347c478bd9Sstevel@tonic-gate /* 45357c478bd9Sstevel@tonic-gate * Grab the quota lock before 45367c478bd9Sstevel@tonic-gate * upgrading i_contents, but if we can't grab it 45377c478bd9Sstevel@tonic-gate * don't wait here due to lock order: 45387c478bd9Sstevel@tonic-gate * vfs_dqrwlock > i_contents. 45397c478bd9Sstevel@tonic-gate */ 454080d34432Sfrankho if (do_qlock && 454180d34432Sfrankho rw_tryenter(&ufsvfsp->vfs_dqrwlock, RW_READER) 454280d34432Sfrankho == 0) { 45437c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 45447c478bd9Sstevel@tonic-gate goto retrylock; 45457c478bd9Sstevel@tonic-gate } 45467c478bd9Sstevel@tonic-gate if (!rw_tryupgrade(&ip->i_contents)) { 45477c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 45487c478bd9Sstevel@tonic-gate if (do_qlock) 45497c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 45507c478bd9Sstevel@tonic-gate goto retrylock; 45517c478bd9Sstevel@tonic-gate } 45527c478bd9Sstevel@tonic-gate } 45537c478bd9Sstevel@tonic-gate 45547c478bd9Sstevel@tonic-gate /* 45557c478bd9Sstevel@tonic-gate * May be allocating disk blocks for holes here as 45567c478bd9Sstevel@tonic-gate * a result of mmap faults. write(2) does the bmap_write 45577c478bd9Sstevel@tonic-gate * in rdip/wrip, not here. We are not dealing with frags 45587c478bd9Sstevel@tonic-gate * in this case. 45597c478bd9Sstevel@tonic-gate */ 45607c478bd9Sstevel@tonic-gate /* 45617c478bd9Sstevel@tonic-gate * Large Files: We cast fs_bmask field to offset_t 45627c478bd9Sstevel@tonic-gate * just as we do for MAXBMASK because uoff is a 64-bit 45637c478bd9Sstevel@tonic-gate * data type. fs_bmask will still be a 32-bit type 45647c478bd9Sstevel@tonic-gate * as we cannot change any ondisk data structures. 45657c478bd9Sstevel@tonic-gate */ 45667c478bd9Sstevel@tonic-gate 45677c478bd9Sstevel@tonic-gate offset = uoff & (offset_t)fs->fs_bmask; 45687c478bd9Sstevel@tonic-gate while (offset < uoff + len) { 45697c478bd9Sstevel@tonic-gate blk_size = (int)blksize(fs, ip, lblkno(fs, offset)); 4570303bf60bSsdebnath err = bmap_write(ip, offset, blk_size, 4571303bf60bSsdebnath BI_NORMAL, NULL, cr); 45727c478bd9Sstevel@tonic-gate if (ip->i_flag & (ICHG|IUPD)) 45737c478bd9Sstevel@tonic-gate ip->i_seq++; 45747c478bd9Sstevel@tonic-gate if (err) 45757c478bd9Sstevel@tonic-gate goto update_inode; 45767c478bd9Sstevel@tonic-gate offset += blk_size; /* XXX - make this contig */ 45777c478bd9Sstevel@tonic-gate } 45787c478bd9Sstevel@tonic-gate } 45797c478bd9Sstevel@tonic-gate 45807c478bd9Sstevel@tonic-gate /* 45817c478bd9Sstevel@tonic-gate * Can be a reader from now on. 45827c478bd9Sstevel@tonic-gate */ 45837c478bd9Sstevel@tonic-gate if (dolock && rwtype == RW_WRITER) { 45847c478bd9Sstevel@tonic-gate rw_downgrade(&ip->i_contents); 45857c478bd9Sstevel@tonic-gate /* 45867c478bd9Sstevel@tonic-gate * We can release vfs_dqrwlock early so do it, but make 45877c478bd9Sstevel@tonic-gate * sure we don't try to release it again at the bottom. 45887c478bd9Sstevel@tonic-gate */ 45897c478bd9Sstevel@tonic-gate if (do_qlock) { 45907c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 45917c478bd9Sstevel@tonic-gate do_qlock = 0; 45927c478bd9Sstevel@tonic-gate } 45937c478bd9Sstevel@tonic-gate } 45947c478bd9Sstevel@tonic-gate 45957c478bd9Sstevel@tonic-gate /* 45967c478bd9Sstevel@tonic-gate * We remove PROT_WRITE in cases when the file has UFS holes 45977c478bd9Sstevel@tonic-gate * because we don't want to call bmap_read() to check each 45987c478bd9Sstevel@tonic-gate * page if it is backed with a disk block. 45997c478bd9Sstevel@tonic-gate */ 46007c478bd9Sstevel@tonic-gate if (protp && has_holes && rw != S_WRITE && rw != S_CREATE) 46017c478bd9Sstevel@tonic-gate *protp &= ~PROT_WRITE; 46027c478bd9Sstevel@tonic-gate 46037c478bd9Sstevel@tonic-gate err = 0; 46047c478bd9Sstevel@tonic-gate 46057c478bd9Sstevel@tonic-gate /* 46067c478bd9Sstevel@tonic-gate * The loop looks up pages in the range [off, off + len). 46077c478bd9Sstevel@tonic-gate * For each page, we first check if we should initiate an asynchronous 46087c478bd9Sstevel@tonic-gate * read ahead before we call page_lookup (we may sleep in page_lookup 46097c478bd9Sstevel@tonic-gate * for a previously initiated disk read). 46107c478bd9Sstevel@tonic-gate */ 46117c478bd9Sstevel@tonic-gate eoff = (uoff + len); 46127c478bd9Sstevel@tonic-gate for (pgoff = uoff, pgaddr = addr, pl = plarr; 46137c478bd9Sstevel@tonic-gate pgoff < eoff; /* empty */) { 46147c478bd9Sstevel@tonic-gate page_t *pp; 46157c478bd9Sstevel@tonic-gate u_offset_t nextrio; 46167c478bd9Sstevel@tonic-gate se_t se; 46177c478bd9Sstevel@tonic-gate int retval; 46187c478bd9Sstevel@tonic-gate 46197c478bd9Sstevel@tonic-gate se = ((rw == S_CREATE || rw == S_OTHER) ? SE_EXCL : SE_SHARED); 46207c478bd9Sstevel@tonic-gate 46217c478bd9Sstevel@tonic-gate /* Handle async getpage (faultahead) */ 46227c478bd9Sstevel@tonic-gate if (plarr == NULL) { 46237c478bd9Sstevel@tonic-gate ip->i_nextrio = pgoff; 46247c478bd9Sstevel@tonic-gate (void) ufs_getpage_ra(vp, pgoff, seg, pgaddr); 46257c478bd9Sstevel@tonic-gate pgoff += pgsize; 46267c478bd9Sstevel@tonic-gate pgaddr += pgsize; 46277c478bd9Sstevel@tonic-gate continue; 46287c478bd9Sstevel@tonic-gate } 46297c478bd9Sstevel@tonic-gate /* 46307c478bd9Sstevel@tonic-gate * Check if we should initiate read ahead of next cluster. 46317c478bd9Sstevel@tonic-gate * We call page_exists only when we need to confirm that 46327c478bd9Sstevel@tonic-gate * we have the current page before we initiate the read ahead. 46337c478bd9Sstevel@tonic-gate */ 46347c478bd9Sstevel@tonic-gate nextrio = ip->i_nextrio; 46357c478bd9Sstevel@tonic-gate if (seqmode && 46367c478bd9Sstevel@tonic-gate pgoff + CLUSTSZ(ip) >= nextrio && pgoff <= nextrio && 46377c478bd9Sstevel@tonic-gate nextrio < ip->i_size && page_exists(vp, pgoff)) { 46387c478bd9Sstevel@tonic-gate retval = ufs_getpage_ra(vp, pgoff, seg, pgaddr); 46397c478bd9Sstevel@tonic-gate /* 46407c478bd9Sstevel@tonic-gate * We always read ahead the next cluster of data 46417c478bd9Sstevel@tonic-gate * starting from i_nextrio. If the page (vp,nextrio) 46427c478bd9Sstevel@tonic-gate * is actually in core at this point, the routine 46437c478bd9Sstevel@tonic-gate * ufs_getpage_ra() will stop pre-fetching data 46447c478bd9Sstevel@tonic-gate * until we read that page in a synchronized manner 46457c478bd9Sstevel@tonic-gate * through ufs_getpage_miss(). So, we should increase 46467c478bd9Sstevel@tonic-gate * i_nextrio if the page (vp, nextrio) exists. 46477c478bd9Sstevel@tonic-gate */ 46487c478bd9Sstevel@tonic-gate if ((retval == 0) && page_exists(vp, nextrio)) { 46497c478bd9Sstevel@tonic-gate ip->i_nextrio = nextrio + pgsize; 46507c478bd9Sstevel@tonic-gate } 46517c478bd9Sstevel@tonic-gate } 46527c478bd9Sstevel@tonic-gate 46537c478bd9Sstevel@tonic-gate if ((pp = page_lookup(vp, pgoff, se)) != NULL) { 46547c478bd9Sstevel@tonic-gate /* 46557c478bd9Sstevel@tonic-gate * We found the page in the page cache. 46567c478bd9Sstevel@tonic-gate */ 46577c478bd9Sstevel@tonic-gate *pl++ = pp; 46587c478bd9Sstevel@tonic-gate pgoff += pgsize; 46597c478bd9Sstevel@tonic-gate pgaddr += pgsize; 46607c478bd9Sstevel@tonic-gate len -= pgsize; 46617c478bd9Sstevel@tonic-gate plsz -= pgsize; 46627c478bd9Sstevel@tonic-gate } else { 46637c478bd9Sstevel@tonic-gate /* 46647c478bd9Sstevel@tonic-gate * We have to create the page, or read it from disk. 46657c478bd9Sstevel@tonic-gate */ 46667c478bd9Sstevel@tonic-gate if (err = ufs_getpage_miss(vp, pgoff, len, seg, pgaddr, 46677c478bd9Sstevel@tonic-gate pl, plsz, rw, seqmode)) 46687c478bd9Sstevel@tonic-gate goto error; 46697c478bd9Sstevel@tonic-gate 46707c478bd9Sstevel@tonic-gate while (*pl != NULL) { 46717c478bd9Sstevel@tonic-gate pl++; 46727c478bd9Sstevel@tonic-gate pgoff += pgsize; 46737c478bd9Sstevel@tonic-gate pgaddr += pgsize; 46747c478bd9Sstevel@tonic-gate len -= pgsize; 46757c478bd9Sstevel@tonic-gate plsz -= pgsize; 46767c478bd9Sstevel@tonic-gate } 46777c478bd9Sstevel@tonic-gate } 46787c478bd9Sstevel@tonic-gate } 46797c478bd9Sstevel@tonic-gate 46807c478bd9Sstevel@tonic-gate /* 46817c478bd9Sstevel@tonic-gate * Return pages up to plsz if they are in the page cache. 46827c478bd9Sstevel@tonic-gate * We cannot return pages if there is a chance that they are 46837c478bd9Sstevel@tonic-gate * backed with a UFS hole and rw is S_WRITE or S_CREATE. 46847c478bd9Sstevel@tonic-gate */ 46857c478bd9Sstevel@tonic-gate if (plarr && !(has_holes && (rw == S_WRITE || rw == S_CREATE))) { 46867c478bd9Sstevel@tonic-gate 46877c478bd9Sstevel@tonic-gate ASSERT((protp == NULL) || 468880d34432Sfrankho !(has_holes && (*protp & PROT_WRITE))); 46897c478bd9Sstevel@tonic-gate 46907c478bd9Sstevel@tonic-gate eoff = pgoff + plsz; 46917c478bd9Sstevel@tonic-gate while (pgoff < eoff) { 46927c478bd9Sstevel@tonic-gate page_t *pp; 46937c478bd9Sstevel@tonic-gate 46947c478bd9Sstevel@tonic-gate if ((pp = page_lookup_nowait(vp, pgoff, 46957c478bd9Sstevel@tonic-gate SE_SHARED)) == NULL) 46967c478bd9Sstevel@tonic-gate break; 46977c478bd9Sstevel@tonic-gate 46987c478bd9Sstevel@tonic-gate *pl++ = pp; 46997c478bd9Sstevel@tonic-gate pgoff += pgsize; 47007c478bd9Sstevel@tonic-gate plsz -= pgsize; 47017c478bd9Sstevel@tonic-gate } 47027c478bd9Sstevel@tonic-gate } 47037c478bd9Sstevel@tonic-gate 47047c478bd9Sstevel@tonic-gate if (plarr) 47057c478bd9Sstevel@tonic-gate *pl = NULL; /* Terminate page list */ 47067c478bd9Sstevel@tonic-gate ip->i_nextr = pgoff; 47077c478bd9Sstevel@tonic-gate 47087c478bd9Sstevel@tonic-gate error: 47097c478bd9Sstevel@tonic-gate if (err && plarr) { 47107c478bd9Sstevel@tonic-gate /* 47117c478bd9Sstevel@tonic-gate * Release any pages we have locked. 47127c478bd9Sstevel@tonic-gate */ 47137c478bd9Sstevel@tonic-gate while (pl > &plarr[0]) 47147c478bd9Sstevel@tonic-gate page_unlock(*--pl); 47157c478bd9Sstevel@tonic-gate 47167c478bd9Sstevel@tonic-gate plarr[0] = NULL; 47177c478bd9Sstevel@tonic-gate } 47187c478bd9Sstevel@tonic-gate 47197c478bd9Sstevel@tonic-gate update_inode: 47207c478bd9Sstevel@tonic-gate /* 47217c478bd9Sstevel@tonic-gate * If the inode is not already marked for IACC (in rdip() for read) 47227c478bd9Sstevel@tonic-gate * and the inode is not marked for no access time update (in wrip() 47237c478bd9Sstevel@tonic-gate * for write) then update the inode access time and mod time now. 47247c478bd9Sstevel@tonic-gate */ 47257c478bd9Sstevel@tonic-gate if ((ip->i_flag & (IACC | INOACC)) == 0) { 47267c478bd9Sstevel@tonic-gate if ((rw != S_OTHER) && (ip->i_mode & IFMT) != IFDIR) { 47277c478bd9Sstevel@tonic-gate if (!ULOCKFS_IS_NOIACC(ITOUL(ip)) && 47287c478bd9Sstevel@tonic-gate (fs->fs_ronly == 0) && 47297c478bd9Sstevel@tonic-gate (!ufsvfsp->vfs_noatime)) { 47307c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 47317c478bd9Sstevel@tonic-gate ip->i_flag |= IACC; 47327c478bd9Sstevel@tonic-gate ITIMES_NOLOCK(ip); 47337c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 47347c478bd9Sstevel@tonic-gate } 47357c478bd9Sstevel@tonic-gate } 47367c478bd9Sstevel@tonic-gate } 47377c478bd9Sstevel@tonic-gate 47387c478bd9Sstevel@tonic-gate if (dolock) { 47397c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 47407c478bd9Sstevel@tonic-gate if (do_qlock && rwtype == RW_WRITER) 47417c478bd9Sstevel@tonic-gate rw_exit(&ufsvfsp->vfs_dqrwlock); 47427c478bd9Sstevel@tonic-gate } 47437c478bd9Sstevel@tonic-gate 47447c478bd9Sstevel@tonic-gate unlock: 47457c478bd9Sstevel@tonic-gate if (ulp) { 47467c478bd9Sstevel@tonic-gate if ((rw == S_CREATE || rw == S_WRITE) && 47477c478bd9Sstevel@tonic-gate !(vp->v_flag & VISSWAP)) { 47487c478bd9Sstevel@tonic-gate TRANS_END_ASYNC(ufsvfsp, TOP_GETPAGE, trans_size); 47497c478bd9Sstevel@tonic-gate } 47507c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 47517c478bd9Sstevel@tonic-gate } 47527c478bd9Sstevel@tonic-gate out: 47537c478bd9Sstevel@tonic-gate return (err); 47547c478bd9Sstevel@tonic-gate } 47557c478bd9Sstevel@tonic-gate 47567c478bd9Sstevel@tonic-gate /* 47577c478bd9Sstevel@tonic-gate * ufs_getpage_miss is called when ufs_getpage missed the page in the page 47587c478bd9Sstevel@tonic-gate * cache. The page is either read from the disk, or it's created. 47597c478bd9Sstevel@tonic-gate * A page is created (without disk read) if rw == S_CREATE, or if 47607c478bd9Sstevel@tonic-gate * the page is not backed with a real disk block (UFS hole). 47617c478bd9Sstevel@tonic-gate */ 47627c478bd9Sstevel@tonic-gate /* ARGSUSED */ 47637c478bd9Sstevel@tonic-gate static int 47647c478bd9Sstevel@tonic-gate ufs_getpage_miss(struct vnode *vp, u_offset_t off, size_t len, struct seg *seg, 476580d5689fSPatrick Mooney caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw, int seq) 47667c478bd9Sstevel@tonic-gate { 47677c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 47687c478bd9Sstevel@tonic-gate page_t *pp; 47697c478bd9Sstevel@tonic-gate daddr_t bn; 47707c478bd9Sstevel@tonic-gate size_t io_len; 4771303bf60bSsdebnath int crpage = 0; 47727c478bd9Sstevel@tonic-gate int err; 47737c478bd9Sstevel@tonic-gate int contig; 47747c478bd9Sstevel@tonic-gate int bsize = ip->i_fs->fs_bsize; 47757c478bd9Sstevel@tonic-gate 47767c478bd9Sstevel@tonic-gate /* 47777c478bd9Sstevel@tonic-gate * Figure out whether the page can be created, or must be 47787c478bd9Sstevel@tonic-gate * must be read from the disk. 47797c478bd9Sstevel@tonic-gate */ 47807c478bd9Sstevel@tonic-gate if (rw == S_CREATE) 47817c478bd9Sstevel@tonic-gate crpage = 1; 47827c478bd9Sstevel@tonic-gate else { 47837c478bd9Sstevel@tonic-gate contig = 0; 47847c478bd9Sstevel@tonic-gate if (err = bmap_read(ip, off, &bn, &contig)) 47857c478bd9Sstevel@tonic-gate return (err); 4786303bf60bSsdebnath 47877c478bd9Sstevel@tonic-gate crpage = (bn == UFS_HOLE); 4788303bf60bSsdebnath 4789303bf60bSsdebnath /* 4790303bf60bSsdebnath * If its also a fallocated block that hasn't been written to 4791303bf60bSsdebnath * yet, we will treat it just like a UFS_HOLE and create 4792303bf60bSsdebnath * a zero page for it 4793303bf60bSsdebnath */ 4794303bf60bSsdebnath if (ISFALLOCBLK(ip, bn)) 4795303bf60bSsdebnath crpage = 1; 47967c478bd9Sstevel@tonic-gate } 47977c478bd9Sstevel@tonic-gate 47987c478bd9Sstevel@tonic-gate if (crpage) { 47997c478bd9Sstevel@tonic-gate if ((pp = page_create_va(vp, off, PAGESIZE, PG_WAIT, seg, 48007c478bd9Sstevel@tonic-gate addr)) == NULL) { 48017c478bd9Sstevel@tonic-gate return (ufs_fault(vp, 480280d34432Sfrankho "ufs_getpage_miss: page_create == NULL")); 48037c478bd9Sstevel@tonic-gate } 48047c478bd9Sstevel@tonic-gate 48057c478bd9Sstevel@tonic-gate if (rw != S_CREATE) 48067c478bd9Sstevel@tonic-gate pagezero(pp, 0, PAGESIZE); 4807303bf60bSsdebnath 48087c478bd9Sstevel@tonic-gate io_len = PAGESIZE; 48097c478bd9Sstevel@tonic-gate } else { 48107c478bd9Sstevel@tonic-gate u_offset_t io_off; 48117c478bd9Sstevel@tonic-gate uint_t xlen; 48127c478bd9Sstevel@tonic-gate struct buf *bp; 48137c478bd9Sstevel@tonic-gate ufsvfs_t *ufsvfsp = ip->i_ufsvfs; 48147c478bd9Sstevel@tonic-gate 48157c478bd9Sstevel@tonic-gate /* 48167c478bd9Sstevel@tonic-gate * If access is not in sequential order, we read from disk 48177c478bd9Sstevel@tonic-gate * in bsize units. 48187c478bd9Sstevel@tonic-gate * 48197c478bd9Sstevel@tonic-gate * We limit the size of the transfer to bsize if we are reading 48207c478bd9Sstevel@tonic-gate * from the beginning of the file. Note in this situation we 48217c478bd9Sstevel@tonic-gate * will hedge our bets and initiate an async read ahead of 48227c478bd9Sstevel@tonic-gate * the second block. 48237c478bd9Sstevel@tonic-gate */ 48247c478bd9Sstevel@tonic-gate if (!seq || off == 0) 48257c478bd9Sstevel@tonic-gate contig = MIN(contig, bsize); 48267c478bd9Sstevel@tonic-gate 48277c478bd9Sstevel@tonic-gate pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 48287c478bd9Sstevel@tonic-gate &io_len, off, contig, 0); 48297c478bd9Sstevel@tonic-gate 48307c478bd9Sstevel@tonic-gate /* 48317c478bd9Sstevel@tonic-gate * Some other thread has entered the page. 48327c478bd9Sstevel@tonic-gate * ufs_getpage will retry page_lookup. 48337c478bd9Sstevel@tonic-gate */ 48347c478bd9Sstevel@tonic-gate if (pp == NULL) { 48357c478bd9Sstevel@tonic-gate pl[0] = NULL; 48367c478bd9Sstevel@tonic-gate return (0); 48377c478bd9Sstevel@tonic-gate } 48387c478bd9Sstevel@tonic-gate 48397c478bd9Sstevel@tonic-gate /* 48407c478bd9Sstevel@tonic-gate * Zero part of the page which we are not 48417c478bd9Sstevel@tonic-gate * going to read from the disk. 48427c478bd9Sstevel@tonic-gate */ 48437c478bd9Sstevel@tonic-gate xlen = io_len & PAGEOFFSET; 48447c478bd9Sstevel@tonic-gate if (xlen != 0) 48457c478bd9Sstevel@tonic-gate pagezero(pp->p_prev, xlen, PAGESIZE - xlen); 48467c478bd9Sstevel@tonic-gate 48477c478bd9Sstevel@tonic-gate bp = pageio_setup(pp, io_len, ip->i_devvp, B_READ); 48487c478bd9Sstevel@tonic-gate bp->b_edev = ip->i_dev; 48497c478bd9Sstevel@tonic-gate bp->b_dev = cmpdev(ip->i_dev); 48507c478bd9Sstevel@tonic-gate bp->b_blkno = bn; 48517c478bd9Sstevel@tonic-gate bp->b_un.b_addr = (caddr_t)0; 48527c478bd9Sstevel@tonic-gate bp->b_file = ip->i_vnode; 48537c478bd9Sstevel@tonic-gate bp->b_offset = off; 48547c478bd9Sstevel@tonic-gate 48557c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_log) { 48567c478bd9Sstevel@tonic-gate lufs_read_strategy(ufsvfsp->vfs_log, bp); 48577c478bd9Sstevel@tonic-gate } else if (ufsvfsp->vfs_snapshot) { 48587c478bd9Sstevel@tonic-gate fssnap_strategy(&ufsvfsp->vfs_snapshot, bp); 48597c478bd9Sstevel@tonic-gate } else { 4860d3d50737SRafael Vanoni ufsvfsp->vfs_iotstamp = ddi_get_lbolt(); 48617c478bd9Sstevel@tonic-gate ub.ub_getpages.value.ul++; 48627c478bd9Sstevel@tonic-gate (void) bdev_strategy(bp); 48637c478bd9Sstevel@tonic-gate lwp_stat_update(LWP_STAT_INBLK, 1); 48647c478bd9Sstevel@tonic-gate } 48657c478bd9Sstevel@tonic-gate 48667c478bd9Sstevel@tonic-gate ip->i_nextrio = off + ((io_len + PAGESIZE - 1) & PAGEMASK); 48677c478bd9Sstevel@tonic-gate 48687c478bd9Sstevel@tonic-gate /* 48697c478bd9Sstevel@tonic-gate * If the file access is sequential, initiate read ahead 48707c478bd9Sstevel@tonic-gate * of the next cluster. 48717c478bd9Sstevel@tonic-gate */ 48727c478bd9Sstevel@tonic-gate if (seq && ip->i_nextrio < ip->i_size) 48737c478bd9Sstevel@tonic-gate (void) ufs_getpage_ra(vp, off, seg, addr); 48747c478bd9Sstevel@tonic-gate err = biowait(bp); 48757c478bd9Sstevel@tonic-gate pageio_done(bp); 48767c478bd9Sstevel@tonic-gate 48777c478bd9Sstevel@tonic-gate if (err) { 48787c478bd9Sstevel@tonic-gate pvn_read_done(pp, B_ERROR); 48797c478bd9Sstevel@tonic-gate return (err); 48807c478bd9Sstevel@tonic-gate } 48817c478bd9Sstevel@tonic-gate } 48827c478bd9Sstevel@tonic-gate 48837c478bd9Sstevel@tonic-gate pvn_plist_init(pp, pl, plsz, off, io_len, rw); 48847c478bd9Sstevel@tonic-gate return (0); 48857c478bd9Sstevel@tonic-gate } 48867c478bd9Sstevel@tonic-gate 48877c478bd9Sstevel@tonic-gate /* 48887c478bd9Sstevel@tonic-gate * Read ahead a cluster from the disk. Returns the length in bytes. 48897c478bd9Sstevel@tonic-gate */ 48907c478bd9Sstevel@tonic-gate static int 48917c478bd9Sstevel@tonic-gate ufs_getpage_ra(struct vnode *vp, u_offset_t off, struct seg *seg, caddr_t addr) 48927c478bd9Sstevel@tonic-gate { 48937c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 48947c478bd9Sstevel@tonic-gate page_t *pp; 48957c478bd9Sstevel@tonic-gate u_offset_t io_off = ip->i_nextrio; 48967c478bd9Sstevel@tonic-gate ufsvfs_t *ufsvfsp; 48977c478bd9Sstevel@tonic-gate caddr_t addr2 = addr + (io_off - off); 48987c478bd9Sstevel@tonic-gate struct buf *bp; 48997c478bd9Sstevel@tonic-gate daddr_t bn; 49007c478bd9Sstevel@tonic-gate size_t io_len; 4901303bf60bSsdebnath int err; 49027c478bd9Sstevel@tonic-gate int contig; 49037c478bd9Sstevel@tonic-gate int xlen; 49047c478bd9Sstevel@tonic-gate int bsize = ip->i_fs->fs_bsize; 49057c478bd9Sstevel@tonic-gate 49067c478bd9Sstevel@tonic-gate /* 49077c478bd9Sstevel@tonic-gate * If the directio advisory is in effect on this file, 49087c478bd9Sstevel@tonic-gate * then do not do buffered read ahead. Read ahead makes 49097c478bd9Sstevel@tonic-gate * it more difficult on threads using directio as they 49107c478bd9Sstevel@tonic-gate * will be forced to flush the pages from this vnode. 49117c478bd9Sstevel@tonic-gate */ 49127c478bd9Sstevel@tonic-gate if ((ufsvfsp = ip->i_ufsvfs) == NULL) 49137c478bd9Sstevel@tonic-gate return (0); 49147c478bd9Sstevel@tonic-gate if (ip->i_flag & IDIRECTIO || ufsvfsp->vfs_forcedirectio) 49157c478bd9Sstevel@tonic-gate return (0); 49167c478bd9Sstevel@tonic-gate 49177c478bd9Sstevel@tonic-gate /* 49187c478bd9Sstevel@tonic-gate * Is this test needed? 49197c478bd9Sstevel@tonic-gate */ 49207c478bd9Sstevel@tonic-gate if (addr2 >= seg->s_base + seg->s_size) 49217c478bd9Sstevel@tonic-gate return (0); 49227c478bd9Sstevel@tonic-gate 49237c478bd9Sstevel@tonic-gate contig = 0; 4924303bf60bSsdebnath err = bmap_read(ip, io_off, &bn, &contig); 4925303bf60bSsdebnath /* 4926303bf60bSsdebnath * If its a UFS_HOLE or a fallocated block, do not perform 4927303bf60bSsdebnath * any read ahead's since there probably is nothing to read ahead 4928303bf60bSsdebnath */ 4929303bf60bSsdebnath if (err || bn == UFS_HOLE || ISFALLOCBLK(ip, bn)) 49307c478bd9Sstevel@tonic-gate return (0); 49317c478bd9Sstevel@tonic-gate 49327c478bd9Sstevel@tonic-gate /* 49337c478bd9Sstevel@tonic-gate * Limit the transfer size to bsize if this is the 2nd block. 49347c478bd9Sstevel@tonic-gate */ 49357c478bd9Sstevel@tonic-gate if (io_off == (u_offset_t)bsize) 49367c478bd9Sstevel@tonic-gate contig = MIN(contig, bsize); 49377c478bd9Sstevel@tonic-gate 49387c478bd9Sstevel@tonic-gate if ((pp = pvn_read_kluster(vp, io_off, seg, addr2, &io_off, 49397c478bd9Sstevel@tonic-gate &io_len, io_off, contig, 1)) == NULL) 49407c478bd9Sstevel@tonic-gate return (0); 49417c478bd9Sstevel@tonic-gate 49427c478bd9Sstevel@tonic-gate /* 49437c478bd9Sstevel@tonic-gate * Zero part of page which we are not going to read from disk 49447c478bd9Sstevel@tonic-gate */ 49457c478bd9Sstevel@tonic-gate if ((xlen = (io_len & PAGEOFFSET)) > 0) 49467c478bd9Sstevel@tonic-gate pagezero(pp->p_prev, xlen, PAGESIZE - xlen); 49477c478bd9Sstevel@tonic-gate 49487c478bd9Sstevel@tonic-gate ip->i_nextrio = (io_off + io_len + PAGESIZE - 1) & PAGEMASK; 49497c478bd9Sstevel@tonic-gate 49507c478bd9Sstevel@tonic-gate bp = pageio_setup(pp, io_len, ip->i_devvp, B_READ | B_ASYNC); 49517c478bd9Sstevel@tonic-gate bp->b_edev = ip->i_dev; 49527c478bd9Sstevel@tonic-gate bp->b_dev = cmpdev(ip->i_dev); 49537c478bd9Sstevel@tonic-gate bp->b_blkno = bn; 49547c478bd9Sstevel@tonic-gate bp->b_un.b_addr = (caddr_t)0; 49557c478bd9Sstevel@tonic-gate bp->b_file = ip->i_vnode; 49567c478bd9Sstevel@tonic-gate bp->b_offset = off; 49577c478bd9Sstevel@tonic-gate 49587c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_log) { 49597c478bd9Sstevel@tonic-gate lufs_read_strategy(ufsvfsp->vfs_log, bp); 49607c478bd9Sstevel@tonic-gate } else if (ufsvfsp->vfs_snapshot) { 49617c478bd9Sstevel@tonic-gate fssnap_strategy(&ufsvfsp->vfs_snapshot, bp); 49627c478bd9Sstevel@tonic-gate } else { 4963d3d50737SRafael Vanoni ufsvfsp->vfs_iotstamp = ddi_get_lbolt(); 49647c478bd9Sstevel@tonic-gate ub.ub_getras.value.ul++; 49657c478bd9Sstevel@tonic-gate (void) bdev_strategy(bp); 49667c478bd9Sstevel@tonic-gate lwp_stat_update(LWP_STAT_INBLK, 1); 49677c478bd9Sstevel@tonic-gate } 49687c478bd9Sstevel@tonic-gate 49697c478bd9Sstevel@tonic-gate return (io_len); 49707c478bd9Sstevel@tonic-gate } 49717c478bd9Sstevel@tonic-gate 49727c478bd9Sstevel@tonic-gate int ufs_delay = 1; 49737c478bd9Sstevel@tonic-gate /* 49747c478bd9Sstevel@tonic-gate * Flags are composed of {B_INVAL, B_FREE, B_DONTNEED, B_FORCE, B_ASYNC} 49757c478bd9Sstevel@tonic-gate * 49767c478bd9Sstevel@tonic-gate * LMXXX - the inode really ought to contain a pointer to one of these 49777c478bd9Sstevel@tonic-gate * async args. Stuff gunk in there and just hand the whole mess off. 49787c478bd9Sstevel@tonic-gate * This would replace i_delaylen, i_delayoff. 49797c478bd9Sstevel@tonic-gate */ 49807c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 49817c478bd9Sstevel@tonic-gate static int 49827c478bd9Sstevel@tonic-gate ufs_putpage(struct vnode *vp, offset_t off, size_t len, int flags, 498380d5689fSPatrick Mooney struct cred *cr, caller_context_t *ct) 49847c478bd9Sstevel@tonic-gate { 49857c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 49867c478bd9Sstevel@tonic-gate int err = 0; 49877c478bd9Sstevel@tonic-gate 49887c478bd9Sstevel@tonic-gate if (vp->v_count == 0) { 49897c478bd9Sstevel@tonic-gate return (ufs_fault(vp, "ufs_putpage: bad v_count == 0")); 49907c478bd9Sstevel@tonic-gate } 49917c478bd9Sstevel@tonic-gate 49927c478bd9Sstevel@tonic-gate /* 49937c478bd9Sstevel@tonic-gate * XXX - Why should this check be made here? 49947c478bd9Sstevel@tonic-gate */ 49957c478bd9Sstevel@tonic-gate if (vp->v_flag & VNOMAP) { 49967c478bd9Sstevel@tonic-gate err = ENOSYS; 49977c478bd9Sstevel@tonic-gate goto errout; 49987c478bd9Sstevel@tonic-gate } 49997c478bd9Sstevel@tonic-gate 50007c478bd9Sstevel@tonic-gate if (ip->i_ufsvfs == NULL) { 50017c478bd9Sstevel@tonic-gate err = EIO; 50027c478bd9Sstevel@tonic-gate goto errout; 50037c478bd9Sstevel@tonic-gate } 50047c478bd9Sstevel@tonic-gate 50057c478bd9Sstevel@tonic-gate if (flags & B_ASYNC) { 50067c478bd9Sstevel@tonic-gate if (ufs_delay && len && 50077c478bd9Sstevel@tonic-gate (flags & ~(B_ASYNC|B_DONTNEED|B_FREE)) == 0) { 50087c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 50097c478bd9Sstevel@tonic-gate /* 50107c478bd9Sstevel@tonic-gate * If nobody stalled, start a new cluster. 50117c478bd9Sstevel@tonic-gate */ 50127c478bd9Sstevel@tonic-gate if (ip->i_delaylen == 0) { 50137c478bd9Sstevel@tonic-gate ip->i_delayoff = off; 50147c478bd9Sstevel@tonic-gate ip->i_delaylen = len; 50157c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 50167c478bd9Sstevel@tonic-gate goto errout; 50177c478bd9Sstevel@tonic-gate } 50187c478bd9Sstevel@tonic-gate /* 50197c478bd9Sstevel@tonic-gate * If we have a full cluster or they are not contig, 50207c478bd9Sstevel@tonic-gate * then push last cluster and start over. 50217c478bd9Sstevel@tonic-gate */ 50227c478bd9Sstevel@tonic-gate if (ip->i_delaylen >= CLUSTSZ(ip) || 50237c478bd9Sstevel@tonic-gate ip->i_delayoff + ip->i_delaylen != off) { 50247c478bd9Sstevel@tonic-gate u_offset_t doff; 50257c478bd9Sstevel@tonic-gate size_t dlen; 50267c478bd9Sstevel@tonic-gate 50277c478bd9Sstevel@tonic-gate doff = ip->i_delayoff; 50287c478bd9Sstevel@tonic-gate dlen = ip->i_delaylen; 50297c478bd9Sstevel@tonic-gate ip->i_delayoff = off; 50307c478bd9Sstevel@tonic-gate ip->i_delaylen = len; 50317c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 50327c478bd9Sstevel@tonic-gate err = ufs_putpages(vp, doff, dlen, 50337c478bd9Sstevel@tonic-gate flags, cr); 50347c478bd9Sstevel@tonic-gate /* LMXXX - flags are new val, not old */ 50357c478bd9Sstevel@tonic-gate goto errout; 50367c478bd9Sstevel@tonic-gate } 50377c478bd9Sstevel@tonic-gate /* 50387c478bd9Sstevel@tonic-gate * There is something there, it's not full, and 50397c478bd9Sstevel@tonic-gate * it is contig. 50407c478bd9Sstevel@tonic-gate */ 50417c478bd9Sstevel@tonic-gate ip->i_delaylen += len; 50427c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 50437c478bd9Sstevel@tonic-gate goto errout; 50447c478bd9Sstevel@tonic-gate } 50457c478bd9Sstevel@tonic-gate /* 50467c478bd9Sstevel@tonic-gate * Must have weird flags or we are not clustering. 50477c478bd9Sstevel@tonic-gate */ 50487c478bd9Sstevel@tonic-gate } 50497c478bd9Sstevel@tonic-gate 50507c478bd9Sstevel@tonic-gate err = ufs_putpages(vp, off, len, flags, cr); 50517c478bd9Sstevel@tonic-gate 50527c478bd9Sstevel@tonic-gate errout: 50537c478bd9Sstevel@tonic-gate return (err); 50547c478bd9Sstevel@tonic-gate } 50557c478bd9Sstevel@tonic-gate 50567c478bd9Sstevel@tonic-gate /* 50577c478bd9Sstevel@tonic-gate * If len == 0, do from off to EOF. 50587c478bd9Sstevel@tonic-gate * 50597c478bd9Sstevel@tonic-gate * The normal cases should be len == 0 & off == 0 (entire vp list), 50607c478bd9Sstevel@tonic-gate * len == MAXBSIZE (from segmap_release actions), and len == PAGESIZE 50617c478bd9Sstevel@tonic-gate * (from pageout). 50627c478bd9Sstevel@tonic-gate */ 50637c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 50647c478bd9Sstevel@tonic-gate static int 506580d5689fSPatrick Mooney ufs_putpages(struct vnode *vp, offset_t off, size_t len, int flags, 506680d5689fSPatrick Mooney struct cred *cr) 50677c478bd9Sstevel@tonic-gate { 50687c478bd9Sstevel@tonic-gate u_offset_t io_off; 50697c478bd9Sstevel@tonic-gate u_offset_t eoff; 50707c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 50717c478bd9Sstevel@tonic-gate page_t *pp; 50727c478bd9Sstevel@tonic-gate size_t io_len; 50737c478bd9Sstevel@tonic-gate int err = 0; 50747c478bd9Sstevel@tonic-gate int dolock; 50757c478bd9Sstevel@tonic-gate 50767c478bd9Sstevel@tonic-gate if (vp->v_count == 0) 50777c478bd9Sstevel@tonic-gate return (ufs_fault(vp, "ufs_putpages: v_count == 0")); 50787c478bd9Sstevel@tonic-gate /* 50797c478bd9Sstevel@tonic-gate * Acquire the readers/write inode lock before locking 50807c478bd9Sstevel@tonic-gate * any pages in this inode. 50817c478bd9Sstevel@tonic-gate * The inode lock is held during i/o. 50827c478bd9Sstevel@tonic-gate */ 50837c478bd9Sstevel@tonic-gate if (len == 0) { 50847c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 50857c478bd9Sstevel@tonic-gate ip->i_delayoff = ip->i_delaylen = 0; 50867c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 50877c478bd9Sstevel@tonic-gate } 50887c478bd9Sstevel@tonic-gate dolock = (rw_owner(&ip->i_contents) != curthread); 50897c478bd9Sstevel@tonic-gate if (dolock) { 50907c478bd9Sstevel@tonic-gate /* 50917c478bd9Sstevel@tonic-gate * Must synchronize this thread and any possible thread 50927c478bd9Sstevel@tonic-gate * operating in the window of vulnerability in wrip(). 50937c478bd9Sstevel@tonic-gate * It is dangerous to allow both a thread doing a putpage 50947c478bd9Sstevel@tonic-gate * and a thread writing, so serialize them. The exception 50957c478bd9Sstevel@tonic-gate * is when the thread in wrip() does something which causes 50967c478bd9Sstevel@tonic-gate * a putpage operation. Then, the thread must be allowed 50977c478bd9Sstevel@tonic-gate * to continue. It may encounter a bmap_read problem in 50987c478bd9Sstevel@tonic-gate * ufs_putapage, but that is handled in ufs_putapage. 50997c478bd9Sstevel@tonic-gate * Allow async writers to proceed, we don't want to block 51007c478bd9Sstevel@tonic-gate * the pageout daemon. 51017c478bd9Sstevel@tonic-gate */ 51027c478bd9Sstevel@tonic-gate if (ip->i_writer == curthread) 51037c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 51047c478bd9Sstevel@tonic-gate else { 51057c478bd9Sstevel@tonic-gate for (;;) { 51067c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 51077c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 51087c478bd9Sstevel@tonic-gate /* 51097c478bd9Sstevel@tonic-gate * If there is no thread in the critical 51107c478bd9Sstevel@tonic-gate * section of wrip(), then proceed. 51117c478bd9Sstevel@tonic-gate * Otherwise, wait until there isn't one. 51127c478bd9Sstevel@tonic-gate */ 51137c478bd9Sstevel@tonic-gate if (ip->i_writer == NULL) { 51147c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 51157c478bd9Sstevel@tonic-gate break; 51167c478bd9Sstevel@tonic-gate } 51177c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 51187c478bd9Sstevel@tonic-gate /* 51197c478bd9Sstevel@tonic-gate * Bounce async writers when we have a writer 51207c478bd9Sstevel@tonic-gate * working on this file so we don't deadlock 51217c478bd9Sstevel@tonic-gate * the pageout daemon. 51227c478bd9Sstevel@tonic-gate */ 51237c478bd9Sstevel@tonic-gate if (flags & B_ASYNC) { 51247c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 51257c478bd9Sstevel@tonic-gate return (0); 51267c478bd9Sstevel@tonic-gate } 51277c478bd9Sstevel@tonic-gate cv_wait(&ip->i_wrcv, &ip->i_tlock); 51287c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 51297c478bd9Sstevel@tonic-gate } 51307c478bd9Sstevel@tonic-gate } 51317c478bd9Sstevel@tonic-gate } 51327c478bd9Sstevel@tonic-gate 51337c478bd9Sstevel@tonic-gate if (!vn_has_cached_data(vp)) { 51347c478bd9Sstevel@tonic-gate if (dolock) 51357c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 51367c478bd9Sstevel@tonic-gate return (0); 51377c478bd9Sstevel@tonic-gate } 51387c478bd9Sstevel@tonic-gate 51397c478bd9Sstevel@tonic-gate if (len == 0) { 51407c478bd9Sstevel@tonic-gate /* 51417c478bd9Sstevel@tonic-gate * Search the entire vp list for pages >= off. 51427c478bd9Sstevel@tonic-gate */ 51437c478bd9Sstevel@tonic-gate err = pvn_vplist_dirty(vp, (u_offset_t)off, ufs_putapage, 514480d34432Sfrankho flags, cr); 51457c478bd9Sstevel@tonic-gate } else { 51467c478bd9Sstevel@tonic-gate /* 51477c478bd9Sstevel@tonic-gate * Loop over all offsets in the range looking for 51487c478bd9Sstevel@tonic-gate * pages to deal with. 51497c478bd9Sstevel@tonic-gate */ 51507c478bd9Sstevel@tonic-gate if ((eoff = blkroundup(ip->i_fs, ip->i_size)) != 0) 51517c478bd9Sstevel@tonic-gate eoff = MIN(off + len, eoff); 51527c478bd9Sstevel@tonic-gate else 51537c478bd9Sstevel@tonic-gate eoff = off + len; 51547c478bd9Sstevel@tonic-gate 51557c478bd9Sstevel@tonic-gate for (io_off = off; io_off < eoff; io_off += io_len) { 51567c478bd9Sstevel@tonic-gate /* 51577c478bd9Sstevel@tonic-gate * If we are not invalidating, synchronously 51587c478bd9Sstevel@tonic-gate * freeing or writing pages, use the routine 51597c478bd9Sstevel@tonic-gate * page_lookup_nowait() to prevent reclaiming 51607c478bd9Sstevel@tonic-gate * them from the free list. 51617c478bd9Sstevel@tonic-gate */ 51627c478bd9Sstevel@tonic-gate if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 51637c478bd9Sstevel@tonic-gate pp = page_lookup(vp, io_off, 516480d34432Sfrankho (flags & (B_INVAL | B_FREE)) ? 516580d34432Sfrankho SE_EXCL : SE_SHARED); 51667c478bd9Sstevel@tonic-gate } else { 51677c478bd9Sstevel@tonic-gate pp = page_lookup_nowait(vp, io_off, 516880d34432Sfrankho (flags & B_FREE) ? SE_EXCL : SE_SHARED); 51697c478bd9Sstevel@tonic-gate } 51707c478bd9Sstevel@tonic-gate 51717c478bd9Sstevel@tonic-gate if (pp == NULL || pvn_getdirty(pp, flags) == 0) 51727c478bd9Sstevel@tonic-gate io_len = PAGESIZE; 51737c478bd9Sstevel@tonic-gate else { 51747c478bd9Sstevel@tonic-gate u_offset_t *io_offp = &io_off; 51757c478bd9Sstevel@tonic-gate 51767c478bd9Sstevel@tonic-gate err = ufs_putapage(vp, pp, io_offp, &io_len, 51777c478bd9Sstevel@tonic-gate flags, cr); 51787c478bd9Sstevel@tonic-gate if (err != 0) 51797c478bd9Sstevel@tonic-gate break; 51807c478bd9Sstevel@tonic-gate /* 51817c478bd9Sstevel@tonic-gate * "io_off" and "io_len" are returned as 51827c478bd9Sstevel@tonic-gate * the range of pages we actually wrote. 51837c478bd9Sstevel@tonic-gate * This allows us to skip ahead more quickly 51847c478bd9Sstevel@tonic-gate * since several pages may've been dealt 51857c478bd9Sstevel@tonic-gate * with by this iteration of the loop. 51867c478bd9Sstevel@tonic-gate */ 51877c478bd9Sstevel@tonic-gate } 51887c478bd9Sstevel@tonic-gate } 51897c478bd9Sstevel@tonic-gate } 51907c478bd9Sstevel@tonic-gate if (err == 0 && off == 0 && (len == 0 || len >= ip->i_size)) { 51917c478bd9Sstevel@tonic-gate /* 51927c478bd9Sstevel@tonic-gate * We have just sync'ed back all the pages on 51937c478bd9Sstevel@tonic-gate * the inode, turn off the IMODTIME flag. 51947c478bd9Sstevel@tonic-gate */ 51957c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 51967c478bd9Sstevel@tonic-gate ip->i_flag &= ~IMODTIME; 51977c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 51987c478bd9Sstevel@tonic-gate } 51997c478bd9Sstevel@tonic-gate if (dolock) 52007c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 52017c478bd9Sstevel@tonic-gate return (err); 52027c478bd9Sstevel@tonic-gate } 52037c478bd9Sstevel@tonic-gate 5204*2575b441SToomas Soome static int 52057c478bd9Sstevel@tonic-gate ufs_iodone(buf_t *bp) 52067c478bd9Sstevel@tonic-gate { 52077c478bd9Sstevel@tonic-gate struct inode *ip; 52087c478bd9Sstevel@tonic-gate 52097c478bd9Sstevel@tonic-gate ASSERT((bp->b_pages->p_vnode != NULL) && !(bp->b_flags & B_READ)); 52107c478bd9Sstevel@tonic-gate 52117c478bd9Sstevel@tonic-gate bp->b_iodone = NULL; 52127c478bd9Sstevel@tonic-gate 52137c478bd9Sstevel@tonic-gate ip = VTOI(bp->b_pages->p_vnode); 52147c478bd9Sstevel@tonic-gate 52157c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 52167c478bd9Sstevel@tonic-gate if (ip->i_writes >= ufs_LW) { 52177c478bd9Sstevel@tonic-gate if ((ip->i_writes -= bp->b_bcount) <= ufs_LW) 52187c478bd9Sstevel@tonic-gate if (ufs_WRITES) 52197c478bd9Sstevel@tonic-gate cv_broadcast(&ip->i_wrcv); /* wake all up */ 52207c478bd9Sstevel@tonic-gate } else { 52217c478bd9Sstevel@tonic-gate ip->i_writes -= bp->b_bcount; 52227c478bd9Sstevel@tonic-gate } 52237c478bd9Sstevel@tonic-gate 52247c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 52257c478bd9Sstevel@tonic-gate iodone(bp); 5226*2575b441SToomas Soome return (0); 52277c478bd9Sstevel@tonic-gate } 52287c478bd9Sstevel@tonic-gate 52297c478bd9Sstevel@tonic-gate /* 52307c478bd9Sstevel@tonic-gate * Write out a single page, possibly klustering adjacent 52317c478bd9Sstevel@tonic-gate * dirty pages. The inode lock must be held. 52327c478bd9Sstevel@tonic-gate * 52337c478bd9Sstevel@tonic-gate * LMXXX - bsize < pagesize not done. 52347c478bd9Sstevel@tonic-gate */ 52357c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 52367c478bd9Sstevel@tonic-gate int 523780d5689fSPatrick Mooney ufs_putapage(struct vnode *vp, page_t *pp, u_offset_t *offp, size_t *lenp, 523880d5689fSPatrick Mooney int flags, struct cred *cr) 52397c478bd9Sstevel@tonic-gate { 52407c478bd9Sstevel@tonic-gate u_offset_t io_off; 52417c478bd9Sstevel@tonic-gate u_offset_t off; 52427c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 52437c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = ip->i_ufsvfs; 52447c478bd9Sstevel@tonic-gate struct fs *fs; 52457c478bd9Sstevel@tonic-gate struct buf *bp; 52467c478bd9Sstevel@tonic-gate size_t io_len; 52477c478bd9Sstevel@tonic-gate daddr_t bn; 52487c478bd9Sstevel@tonic-gate int err; 52497c478bd9Sstevel@tonic-gate int contig; 5250b9dc641bSfrankho int dotrans; 52517c478bd9Sstevel@tonic-gate 52527c478bd9Sstevel@tonic-gate ASSERT(RW_LOCK_HELD(&ip->i_contents)); 52537c478bd9Sstevel@tonic-gate 52547c478bd9Sstevel@tonic-gate if (ufsvfsp == NULL) { 52557c478bd9Sstevel@tonic-gate err = EIO; 52567c478bd9Sstevel@tonic-gate goto out_trace; 52577c478bd9Sstevel@tonic-gate } 52587c478bd9Sstevel@tonic-gate 52597c478bd9Sstevel@tonic-gate fs = ip->i_fs; 52607c478bd9Sstevel@tonic-gate ASSERT(fs->fs_ronly == 0); 52617c478bd9Sstevel@tonic-gate 52627c478bd9Sstevel@tonic-gate /* 52637c478bd9Sstevel@tonic-gate * If the modified time on the inode has not already been 5264956bc340Sdm * set elsewhere (e.g. for write/setattr) we set the time now. 52657c478bd9Sstevel@tonic-gate * This gives us approximate modified times for mmap'ed files 52667c478bd9Sstevel@tonic-gate * which are modified via stores in the user address space. 52677c478bd9Sstevel@tonic-gate */ 5268956bc340Sdm if ((ip->i_flag & IMODTIME) == 0) { 52697c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 52707c478bd9Sstevel@tonic-gate ip->i_flag |= IUPD; 52717c478bd9Sstevel@tonic-gate ip->i_seq++; 52727c478bd9Sstevel@tonic-gate ITIMES_NOLOCK(ip); 52737c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 52747c478bd9Sstevel@tonic-gate } 52757c478bd9Sstevel@tonic-gate 52767c478bd9Sstevel@tonic-gate /* 52777c478bd9Sstevel@tonic-gate * Align the request to a block boundry (for old file systems), 52787c478bd9Sstevel@tonic-gate * and go ask bmap() how contiguous things are for this file. 52797c478bd9Sstevel@tonic-gate */ 52807c478bd9Sstevel@tonic-gate off = pp->p_offset & (offset_t)fs->fs_bmask; /* block align it */ 52817c478bd9Sstevel@tonic-gate contig = 0; 52827c478bd9Sstevel@tonic-gate err = bmap_read(ip, off, &bn, &contig); 52837c478bd9Sstevel@tonic-gate if (err) 52847c478bd9Sstevel@tonic-gate goto out; 52857c478bd9Sstevel@tonic-gate if (bn == UFS_HOLE) { /* putpage never allocates */ 52867c478bd9Sstevel@tonic-gate /* 52877c478bd9Sstevel@tonic-gate * logging device is in error mode; simply return EIO 52887c478bd9Sstevel@tonic-gate */ 52897c478bd9Sstevel@tonic-gate if (TRANS_ISERROR(ufsvfsp)) { 52907c478bd9Sstevel@tonic-gate err = EIO; 52917c478bd9Sstevel@tonic-gate goto out; 52927c478bd9Sstevel@tonic-gate } 52937c478bd9Sstevel@tonic-gate /* 52947c478bd9Sstevel@tonic-gate * Oops, the thread in the window in wrip() did some 52957c478bd9Sstevel@tonic-gate * sort of operation which caused a putpage in the bad 52967c478bd9Sstevel@tonic-gate * range. In this case, just return an error which will 52977c478bd9Sstevel@tonic-gate * cause the software modified bit on the page to set 52987c478bd9Sstevel@tonic-gate * and the page will get written out again later. 52997c478bd9Sstevel@tonic-gate */ 53007c478bd9Sstevel@tonic-gate if (ip->i_writer == curthread) { 53017c478bd9Sstevel@tonic-gate err = EIO; 53027c478bd9Sstevel@tonic-gate goto out; 53037c478bd9Sstevel@tonic-gate } 53047c478bd9Sstevel@tonic-gate /* 53057c478bd9Sstevel@tonic-gate * If the pager is trying to push a page in the bad range 530648bbca81SDaniel Hoffman * just tell it to try again later when things are better. 53077c478bd9Sstevel@tonic-gate */ 53087c478bd9Sstevel@tonic-gate if (flags & B_ASYNC) { 53097c478bd9Sstevel@tonic-gate err = EAGAIN; 53107c478bd9Sstevel@tonic-gate goto out; 53117c478bd9Sstevel@tonic-gate } 53127c478bd9Sstevel@tonic-gate err = ufs_fault(ITOV(ip), "ufs_putapage: bn == UFS_HOLE"); 53137c478bd9Sstevel@tonic-gate goto out; 53147c478bd9Sstevel@tonic-gate } 53157c478bd9Sstevel@tonic-gate 5316303bf60bSsdebnath /* 5317303bf60bSsdebnath * If it is an fallocate'd block, reverse the negativity since 5318303bf60bSsdebnath * we are now writing to it 5319303bf60bSsdebnath */ 5320303bf60bSsdebnath if (ISFALLOCBLK(ip, bn)) { 5321303bf60bSsdebnath err = bmap_set_bn(vp, off, dbtofsb(fs, -bn)); 5322303bf60bSsdebnath if (err) 5323303bf60bSsdebnath goto out; 5324303bf60bSsdebnath 5325303bf60bSsdebnath bn = -bn; 5326303bf60bSsdebnath } 5327303bf60bSsdebnath 53287c478bd9Sstevel@tonic-gate /* 53297c478bd9Sstevel@tonic-gate * Take the length (of contiguous bytes) passed back from bmap() 53307c478bd9Sstevel@tonic-gate * and _try_ and get a set of pages covering that extent. 53317c478bd9Sstevel@tonic-gate */ 53327c478bd9Sstevel@tonic-gate pp = pvn_write_kluster(vp, pp, &io_off, &io_len, off, contig, flags); 53337c478bd9Sstevel@tonic-gate 53347c478bd9Sstevel@tonic-gate /* 53357c478bd9Sstevel@tonic-gate * May have run out of memory and not clustered backwards. 53367c478bd9Sstevel@tonic-gate * off p_offset 53377c478bd9Sstevel@tonic-gate * [ pp - 1 ][ pp ] 53387c478bd9Sstevel@tonic-gate * [ block ] 53397c478bd9Sstevel@tonic-gate * We told bmap off, so we have to adjust the bn accordingly. 53407c478bd9Sstevel@tonic-gate */ 53417c478bd9Sstevel@tonic-gate if (io_off > off) { 53427c478bd9Sstevel@tonic-gate bn += btod(io_off - off); 53437c478bd9Sstevel@tonic-gate contig -= (io_off - off); 53447c478bd9Sstevel@tonic-gate } 53457c478bd9Sstevel@tonic-gate 53467c478bd9Sstevel@tonic-gate /* 53477c478bd9Sstevel@tonic-gate * bmap was carefull to tell us the right size so use that. 53487c478bd9Sstevel@tonic-gate * There might be unallocated frags at the end. 53497c478bd9Sstevel@tonic-gate * LMXXX - bzero the end of the page? We must be writing after EOF. 53507c478bd9Sstevel@tonic-gate */ 53517c478bd9Sstevel@tonic-gate if (io_len > contig) { 53527c478bd9Sstevel@tonic-gate ASSERT(io_len - contig < fs->fs_bsize); 53537c478bd9Sstevel@tonic-gate io_len -= (io_len - contig); 53547c478bd9Sstevel@tonic-gate } 53557c478bd9Sstevel@tonic-gate 53567c478bd9Sstevel@tonic-gate /* 53577c478bd9Sstevel@tonic-gate * Handle the case where we are writing the last page after EOF. 53587c478bd9Sstevel@tonic-gate * 53597c478bd9Sstevel@tonic-gate * XXX - just a patch for i-mt3. 53607c478bd9Sstevel@tonic-gate */ 53617c478bd9Sstevel@tonic-gate if (io_len == 0) { 536280d34432Sfrankho ASSERT(pp->p_offset >= 536380d34432Sfrankho (u_offset_t)(roundup(ip->i_size, PAGESIZE))); 53647c478bd9Sstevel@tonic-gate io_len = PAGESIZE; 53657c478bd9Sstevel@tonic-gate } 53667c478bd9Sstevel@tonic-gate 53677c478bd9Sstevel@tonic-gate bp = pageio_setup(pp, io_len, ip->i_devvp, B_WRITE | flags); 53687c478bd9Sstevel@tonic-gate 53697c478bd9Sstevel@tonic-gate ULOCKFS_SET_MOD(ITOUL(ip)); 53707c478bd9Sstevel@tonic-gate 53717c478bd9Sstevel@tonic-gate bp->b_edev = ip->i_dev; 53727c478bd9Sstevel@tonic-gate bp->b_dev = cmpdev(ip->i_dev); 53737c478bd9Sstevel@tonic-gate bp->b_blkno = bn; 53747c478bd9Sstevel@tonic-gate bp->b_un.b_addr = (caddr_t)0; 53757c478bd9Sstevel@tonic-gate bp->b_file = ip->i_vnode; 53767c478bd9Sstevel@tonic-gate 5377b9dc641bSfrankho /* 5378b9dc641bSfrankho * File contents of shadow or quota inodes are metadata, and updates 5379b9dc641bSfrankho * to these need to be put into a logging transaction. All direct 5380b9dc641bSfrankho * callers in UFS do that, but fsflush can come here _before_ the 5381b9dc641bSfrankho * normal codepath. An example would be updating ACL information, for 5382b9dc641bSfrankho * which the normal codepath would be: 5383b9dc641bSfrankho * ufs_si_store() 5384b9dc641bSfrankho * ufs_rdwri() 5385b9dc641bSfrankho * wrip() 5386b9dc641bSfrankho * segmap_release() 5387b9dc641bSfrankho * VOP_PUTPAGE() 5388b9dc641bSfrankho * Here, fsflush can pick up the dirty page before segmap_release() 5389b9dc641bSfrankho * forces it out. If that happens, there's no transaction. 5390b9dc641bSfrankho * We therefore need to test whether a transaction exists, and if not 5391b9dc641bSfrankho * create one - for fsflush. 5392b9dc641bSfrankho */ 5393b9dc641bSfrankho dotrans = 5394b9dc641bSfrankho (((ip->i_mode & IFMT) == IFSHAD || ufsvfsp->vfs_qinod == ip) && 5395b9dc641bSfrankho ((curthread->t_flag & T_DONTBLOCK) == 0) && 5396b9dc641bSfrankho (TRANS_ISTRANS(ufsvfsp))); 5397b9dc641bSfrankho 5398b9dc641bSfrankho if (dotrans) { 5399b9dc641bSfrankho curthread->t_flag |= T_DONTBLOCK; 5400b9dc641bSfrankho TRANS_BEGIN_ASYNC(ufsvfsp, TOP_PUTPAGE, TOP_PUTPAGE_SIZE(ip)); 5401b9dc641bSfrankho } 54027c478bd9Sstevel@tonic-gate if (TRANS_ISTRANS(ufsvfsp)) { 54037c478bd9Sstevel@tonic-gate if ((ip->i_mode & IFMT) == IFSHAD) { 54047c478bd9Sstevel@tonic-gate TRANS_BUF(ufsvfsp, 0, io_len, bp, DT_SHAD); 54057c478bd9Sstevel@tonic-gate } else if (ufsvfsp->vfs_qinod == ip) { 54067c478bd9Sstevel@tonic-gate TRANS_DELTA(ufsvfsp, ldbtob(bn), bp->b_bcount, DT_QR, 54077c478bd9Sstevel@tonic-gate 0, 0); 54087c478bd9Sstevel@tonic-gate } 54097c478bd9Sstevel@tonic-gate } 5410b9dc641bSfrankho if (dotrans) { 5411b9dc641bSfrankho TRANS_END_ASYNC(ufsvfsp, TOP_PUTPAGE, TOP_PUTPAGE_SIZE(ip)); 5412b9dc641bSfrankho curthread->t_flag &= ~T_DONTBLOCK; 5413b9dc641bSfrankho } 54147c478bd9Sstevel@tonic-gate 54157c478bd9Sstevel@tonic-gate /* write throttle */ 54167c478bd9Sstevel@tonic-gate 54177c478bd9Sstevel@tonic-gate ASSERT(bp->b_iodone == NULL); 5418*2575b441SToomas Soome bp->b_iodone = ufs_iodone; 54197c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 54207c478bd9Sstevel@tonic-gate ip->i_writes += bp->b_bcount; 54217c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 54227c478bd9Sstevel@tonic-gate 54237c478bd9Sstevel@tonic-gate if (bp->b_flags & B_ASYNC) { 54247c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_log) { 54257c478bd9Sstevel@tonic-gate lufs_write_strategy(ufsvfsp->vfs_log, bp); 54267c478bd9Sstevel@tonic-gate } else if (ufsvfsp->vfs_snapshot) { 54277c478bd9Sstevel@tonic-gate fssnap_strategy(&ufsvfsp->vfs_snapshot, bp); 54287c478bd9Sstevel@tonic-gate } else { 5429d3d50737SRafael Vanoni ufsvfsp->vfs_iotstamp = ddi_get_lbolt(); 54307c478bd9Sstevel@tonic-gate ub.ub_putasyncs.value.ul++; 54317c478bd9Sstevel@tonic-gate (void) bdev_strategy(bp); 54327c478bd9Sstevel@tonic-gate lwp_stat_update(LWP_STAT_OUBLK, 1); 54337c478bd9Sstevel@tonic-gate } 54347c478bd9Sstevel@tonic-gate } else { 54357c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_log) { 54367c478bd9Sstevel@tonic-gate lufs_write_strategy(ufsvfsp->vfs_log, bp); 54377c478bd9Sstevel@tonic-gate } else if (ufsvfsp->vfs_snapshot) { 54387c478bd9Sstevel@tonic-gate fssnap_strategy(&ufsvfsp->vfs_snapshot, bp); 54397c478bd9Sstevel@tonic-gate } else { 5440d3d50737SRafael Vanoni ufsvfsp->vfs_iotstamp = ddi_get_lbolt(); 54417c478bd9Sstevel@tonic-gate ub.ub_putsyncs.value.ul++; 54427c478bd9Sstevel@tonic-gate (void) bdev_strategy(bp); 54437c478bd9Sstevel@tonic-gate lwp_stat_update(LWP_STAT_OUBLK, 1); 54447c478bd9Sstevel@tonic-gate } 54457c478bd9Sstevel@tonic-gate err = biowait(bp); 54467c478bd9Sstevel@tonic-gate pageio_done(bp); 54477c478bd9Sstevel@tonic-gate pvn_write_done(pp, ((err) ? B_ERROR : 0) | B_WRITE | flags); 54487c478bd9Sstevel@tonic-gate } 54497c478bd9Sstevel@tonic-gate 54507c478bd9Sstevel@tonic-gate pp = NULL; 54517c478bd9Sstevel@tonic-gate 54527c478bd9Sstevel@tonic-gate out: 54537c478bd9Sstevel@tonic-gate if (err != 0 && pp != NULL) 54547c478bd9Sstevel@tonic-gate pvn_write_done(pp, B_ERROR | B_WRITE | flags); 54557c478bd9Sstevel@tonic-gate 54567c478bd9Sstevel@tonic-gate if (offp) 54577c478bd9Sstevel@tonic-gate *offp = io_off; 54587c478bd9Sstevel@tonic-gate if (lenp) 54597c478bd9Sstevel@tonic-gate *lenp = io_len; 54607c478bd9Sstevel@tonic-gate out_trace: 54617c478bd9Sstevel@tonic-gate return (err); 54627c478bd9Sstevel@tonic-gate } 54637c478bd9Sstevel@tonic-gate 54646ac3b8a8Svsakar uint64_t ufs_map_alock_retry_cnt; 54656ac3b8a8Svsakar uint64_t ufs_map_lockfs_retry_cnt; 54666ac3b8a8Svsakar 54677c478bd9Sstevel@tonic-gate /* ARGSUSED */ 54687c478bd9Sstevel@tonic-gate static int 546980d5689fSPatrick Mooney ufs_map(struct vnode *vp, offset_t off, struct as *as, caddr_t *addrp, 547080d5689fSPatrick Mooney size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, struct cred *cr, 547180d5689fSPatrick Mooney caller_context_t *ct) 54727c478bd9Sstevel@tonic-gate { 54737c478bd9Sstevel@tonic-gate struct segvn_crargs vn_a; 54747c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = VTOI(vp)->i_ufsvfs; 54757c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 54766ac3b8a8Svsakar int error, sig; 54776ac3b8a8Svsakar k_sigset_t smask; 547857846e82Svsakar caddr_t hint = *addrp; 54797c478bd9Sstevel@tonic-gate 54807c478bd9Sstevel@tonic-gate if (vp->v_flag & VNOMAP) { 54817c478bd9Sstevel@tonic-gate error = ENOSYS; 54826ac3b8a8Svsakar goto out; 54837c478bd9Sstevel@tonic-gate } 54847c478bd9Sstevel@tonic-gate 54857c478bd9Sstevel@tonic-gate if (off < (offset_t)0 || (offset_t)(off + len) < (offset_t)0) { 54867c478bd9Sstevel@tonic-gate error = ENXIO; 54876ac3b8a8Svsakar goto out; 54887c478bd9Sstevel@tonic-gate } 54897c478bd9Sstevel@tonic-gate 54907c478bd9Sstevel@tonic-gate if (vp->v_type != VREG) { 54917c478bd9Sstevel@tonic-gate error = ENODEV; 54926ac3b8a8Svsakar goto out; 54937c478bd9Sstevel@tonic-gate } 54947c478bd9Sstevel@tonic-gate 54956ac3b8a8Svsakar retry_map: 549657846e82Svsakar *addrp = hint; 54977c478bd9Sstevel@tonic-gate /* 54987c478bd9Sstevel@tonic-gate * If file is being locked, disallow mapping. 54997c478bd9Sstevel@tonic-gate */ 55007c478bd9Sstevel@tonic-gate if (vn_has_mandatory_locks(vp, VTOI(vp)->i_mode)) { 55017c478bd9Sstevel@tonic-gate error = EAGAIN; 55026ac3b8a8Svsakar goto out; 55037c478bd9Sstevel@tonic-gate } 55047c478bd9Sstevel@tonic-gate 55057c478bd9Sstevel@tonic-gate as_rangelock(as); 550660946fe0Smec /* 550760946fe0Smec * Note that if we are retrying (because ufs_lockfs_trybegin failed in 550860946fe0Smec * the previous attempt), some other thread could have grabbed 550960946fe0Smec * the same VA range if MAP_FIXED is set. In that case, choose_addr 551060946fe0Smec * would unmap the valid VA range, that is ok. 551160946fe0Smec */ 551260946fe0Smec error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); 551360946fe0Smec if (error != 0) { 551460946fe0Smec as_rangeunlock(as); 551560946fe0Smec goto out; 55167c478bd9Sstevel@tonic-gate } 55177c478bd9Sstevel@tonic-gate 55186ac3b8a8Svsakar /* 55196ac3b8a8Svsakar * a_lock has to be acquired before entering the lockfs protocol 55206ac3b8a8Svsakar * because that is the order in which pagefault works. Also we cannot 55216ac3b8a8Svsakar * block on a_lock here because this waiting writer will prevent 55226ac3b8a8Svsakar * further readers like ufs_read from progressing and could cause 55236ac3b8a8Svsakar * deadlock between ufs_read/ufs_map/pagefault when a quiesce is 55246ac3b8a8Svsakar * pending. 55256ac3b8a8Svsakar */ 5526dc32d872SJosef 'Jeff' Sipek while (!AS_LOCK_TRYENTER(as, RW_WRITER)) { 55276ac3b8a8Svsakar ufs_map_alock_retry_cnt++; 55286ac3b8a8Svsakar delay(RETRY_LOCK_DELAY); 55296ac3b8a8Svsakar } 55306ac3b8a8Svsakar 55316ac3b8a8Svsakar /* 55326ac3b8a8Svsakar * We can't hold as->a_lock and wait for lockfs to succeed because 55336ac3b8a8Svsakar * the proc tools might hang on a_lock, so call ufs_lockfs_trybegin() 55346ac3b8a8Svsakar * instead. 55356ac3b8a8Svsakar */ 55366ac3b8a8Svsakar if (error = ufs_lockfs_trybegin(ufsvfsp, &ulp, ULOCKFS_MAP_MASK)) { 55376ac3b8a8Svsakar /* 55386ac3b8a8Svsakar * ufs_lockfs_trybegin() did not succeed. It is safer to give up 55396ac3b8a8Svsakar * as->a_lock and wait for ulp->ul_fs_lock status to change. 55406ac3b8a8Svsakar */ 55416ac3b8a8Svsakar ufs_map_lockfs_retry_cnt++; 5542dc32d872SJosef 'Jeff' Sipek AS_LOCK_EXIT(as); 55436ac3b8a8Svsakar as_rangeunlock(as); 55446ac3b8a8Svsakar if (error == EIO) 55456ac3b8a8Svsakar goto out; 55466ac3b8a8Svsakar 55476ac3b8a8Svsakar mutex_enter(&ulp->ul_lock); 55486ac3b8a8Svsakar while (ulp->ul_fs_lock & ULOCKFS_MAP_MASK) { 55496ac3b8a8Svsakar if (ULOCKFS_IS_SLOCK(ulp) || ufsvfsp->vfs_nointr) { 55506ac3b8a8Svsakar cv_wait(&ulp->ul_cv, &ulp->ul_lock); 55516ac3b8a8Svsakar } else { 55526ac3b8a8Svsakar sigintr(&smask, 1); 55536ac3b8a8Svsakar sig = cv_wait_sig(&ulp->ul_cv, &ulp->ul_lock); 55546ac3b8a8Svsakar sigunintr(&smask); 55556ac3b8a8Svsakar if (((ulp->ul_fs_lock & ULOCKFS_MAP_MASK) && 55566ac3b8a8Svsakar !sig) || ufsvfsp->vfs_dontblock) { 55576ac3b8a8Svsakar mutex_exit(&ulp->ul_lock); 55586ac3b8a8Svsakar return (EINTR); 55596ac3b8a8Svsakar } 55606ac3b8a8Svsakar } 55616ac3b8a8Svsakar } 55626ac3b8a8Svsakar mutex_exit(&ulp->ul_lock); 55636ac3b8a8Svsakar goto retry_map; 55646ac3b8a8Svsakar } 55656ac3b8a8Svsakar 55667c478bd9Sstevel@tonic-gate vn_a.vp = vp; 55677c478bd9Sstevel@tonic-gate vn_a.offset = (u_offset_t)off; 55687c478bd9Sstevel@tonic-gate vn_a.type = flags & MAP_TYPE; 55697c478bd9Sstevel@tonic-gate vn_a.prot = prot; 55707c478bd9Sstevel@tonic-gate vn_a.maxprot = maxprot; 55717c478bd9Sstevel@tonic-gate vn_a.cred = cr; 55727c478bd9Sstevel@tonic-gate vn_a.amp = NULL; 55737c478bd9Sstevel@tonic-gate vn_a.flags = flags & ~MAP_TYPE; 55747c478bd9Sstevel@tonic-gate vn_a.szc = 0; 55757c478bd9Sstevel@tonic-gate vn_a.lgrp_mem_policy_flags = 0; 55767c478bd9Sstevel@tonic-gate 557702ff05a9Svsakar error = as_map_locked(as, *addrp, len, segvn_create, &vn_a); 55786ac3b8a8Svsakar if (ulp) 55797c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 55806ac3b8a8Svsakar as_rangeunlock(as); 55817c478bd9Sstevel@tonic-gate out: 55827c478bd9Sstevel@tonic-gate return (error); 55837c478bd9Sstevel@tonic-gate } 55847c478bd9Sstevel@tonic-gate 55857c478bd9Sstevel@tonic-gate /* ARGSUSED */ 55867c478bd9Sstevel@tonic-gate static int 558780d5689fSPatrick Mooney ufs_addmap(struct vnode *vp, offset_t off, struct as *as, caddr_t addr, 558880d5689fSPatrick Mooney size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, 558980d5689fSPatrick Mooney struct cred *cr, caller_context_t *ct) 55907c478bd9Sstevel@tonic-gate { 55917c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 55927c478bd9Sstevel@tonic-gate 55937c478bd9Sstevel@tonic-gate if (vp->v_flag & VNOMAP) { 55947c478bd9Sstevel@tonic-gate return (ENOSYS); 55957c478bd9Sstevel@tonic-gate } 55967c478bd9Sstevel@tonic-gate 55977c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 55987c478bd9Sstevel@tonic-gate ip->i_mapcnt += btopr(len); 55997c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 56007c478bd9Sstevel@tonic-gate return (0); 56017c478bd9Sstevel@tonic-gate } 56027c478bd9Sstevel@tonic-gate 56037c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 56047c478bd9Sstevel@tonic-gate static int 56057c478bd9Sstevel@tonic-gate ufs_delmap(struct vnode *vp, offset_t off, struct as *as, caddr_t addr, 560680d5689fSPatrick Mooney size_t len, uint_t prot, uint_t maxprot, uint_t flags, struct cred *cr, 560780d5689fSPatrick Mooney caller_context_t *ct) 56087c478bd9Sstevel@tonic-gate { 56097c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 56107c478bd9Sstevel@tonic-gate 56117c478bd9Sstevel@tonic-gate if (vp->v_flag & VNOMAP) { 56127c478bd9Sstevel@tonic-gate return (ENOSYS); 56137c478bd9Sstevel@tonic-gate } 56147c478bd9Sstevel@tonic-gate 56157c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 5616*2575b441SToomas Soome ip->i_mapcnt -= btopr(len); /* Count released mappings */ 56177c478bd9Sstevel@tonic-gate ASSERT(ip->i_mapcnt >= 0); 56187c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 56197c478bd9Sstevel@tonic-gate return (0); 56207c478bd9Sstevel@tonic-gate } 56217c478bd9Sstevel@tonic-gate /* 56227c478bd9Sstevel@tonic-gate * Return the answer requested to poll() for non-device files 56237c478bd9Sstevel@tonic-gate */ 56247c478bd9Sstevel@tonic-gate struct pollhead ufs_pollhd; 56257c478bd9Sstevel@tonic-gate 56267c478bd9Sstevel@tonic-gate /* ARGSUSED */ 56277c478bd9Sstevel@tonic-gate int 5628da6c28aaSamw ufs_poll(vnode_t *vp, short ev, int any, short *revp, struct pollhead **phpp, 562980d5689fSPatrick Mooney caller_context_t *ct) 56307c478bd9Sstevel@tonic-gate { 56317c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 56327c478bd9Sstevel@tonic-gate 563380d5689fSPatrick Mooney /* 563480d5689fSPatrick Mooney * Regular files reject edge-triggered pollers. 563580d5689fSPatrick Mooney * See the comment in fs_poll() for a more detailed explanation. 563680d5689fSPatrick Mooney */ 563780d5689fSPatrick Mooney if (ev & POLLET) { 563880d5689fSPatrick Mooney return (EPERM); 563980d5689fSPatrick Mooney } 564080d5689fSPatrick Mooney 56417c478bd9Sstevel@tonic-gate *revp = 0; 56427c478bd9Sstevel@tonic-gate ufsvfsp = VTOI(vp)->i_ufsvfs; 56437c478bd9Sstevel@tonic-gate 56447c478bd9Sstevel@tonic-gate if (!ufsvfsp) { 56457c478bd9Sstevel@tonic-gate *revp = POLLHUP; 56467c478bd9Sstevel@tonic-gate goto out; 56477c478bd9Sstevel@tonic-gate } 56487c478bd9Sstevel@tonic-gate 56497c478bd9Sstevel@tonic-gate if (ULOCKFS_IS_HLOCK(&ufsvfsp->vfs_ulockfs) || 56507c478bd9Sstevel@tonic-gate ULOCKFS_IS_ELOCK(&ufsvfsp->vfs_ulockfs)) { 56517c478bd9Sstevel@tonic-gate *revp |= POLLERR; 56527c478bd9Sstevel@tonic-gate 56537c478bd9Sstevel@tonic-gate } else { 56547c478bd9Sstevel@tonic-gate if ((ev & POLLOUT) && !ufsvfsp->vfs_fs->fs_ronly && 56557c478bd9Sstevel@tonic-gate !ULOCKFS_IS_WLOCK(&ufsvfsp->vfs_ulockfs)) 56567c478bd9Sstevel@tonic-gate *revp |= POLLOUT; 56577c478bd9Sstevel@tonic-gate 56587c478bd9Sstevel@tonic-gate if ((ev & POLLWRBAND) && !ufsvfsp->vfs_fs->fs_ronly && 56597c478bd9Sstevel@tonic-gate !ULOCKFS_IS_WLOCK(&ufsvfsp->vfs_ulockfs)) 56607c478bd9Sstevel@tonic-gate *revp |= POLLWRBAND; 56617c478bd9Sstevel@tonic-gate 56627c478bd9Sstevel@tonic-gate if (ev & POLLIN) 56637c478bd9Sstevel@tonic-gate *revp |= POLLIN; 56647c478bd9Sstevel@tonic-gate 56657c478bd9Sstevel@tonic-gate if (ev & POLLRDNORM) 56667c478bd9Sstevel@tonic-gate *revp |= POLLRDNORM; 56677c478bd9Sstevel@tonic-gate 56687c478bd9Sstevel@tonic-gate if (ev & POLLRDBAND) 56697c478bd9Sstevel@tonic-gate *revp |= POLLRDBAND; 56707c478bd9Sstevel@tonic-gate } 56717c478bd9Sstevel@tonic-gate 56727c478bd9Sstevel@tonic-gate if ((ev & POLLPRI) && (*revp & (POLLERR|POLLHUP))) 56737c478bd9Sstevel@tonic-gate *revp |= POLLPRI; 56747c478bd9Sstevel@tonic-gate out: 567580d5689fSPatrick Mooney if (*revp == 0 && ! any) { 567680d5689fSPatrick Mooney *phpp = &ufs_pollhd; 567780d5689fSPatrick Mooney } 56787c478bd9Sstevel@tonic-gate 56797c478bd9Sstevel@tonic-gate return (0); 56807c478bd9Sstevel@tonic-gate } 56817c478bd9Sstevel@tonic-gate 56827c478bd9Sstevel@tonic-gate /* ARGSUSED */ 56837c478bd9Sstevel@tonic-gate static int 5684da6c28aaSamw ufs_l_pathconf(struct vnode *vp, int cmd, ulong_t *valp, struct cred *cr, 568580d5689fSPatrick Mooney caller_context_t *ct) 56867c478bd9Sstevel@tonic-gate { 56877c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = VTOI(vp)->i_ufsvfs; 56887c478bd9Sstevel@tonic-gate struct ulockfs *ulp = NULL; 5689*2575b441SToomas Soome struct inode *sip = NULL; 56907c478bd9Sstevel@tonic-gate int error; 5691*2575b441SToomas Soome struct inode *ip = VTOI(vp); 56927c478bd9Sstevel@tonic-gate int issync; 56937c478bd9Sstevel@tonic-gate 56947c478bd9Sstevel@tonic-gate error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_PATHCONF_MASK); 56957c478bd9Sstevel@tonic-gate if (error) 56967c478bd9Sstevel@tonic-gate return (error); 56977c478bd9Sstevel@tonic-gate 56987c478bd9Sstevel@tonic-gate switch (cmd) { 56997c478bd9Sstevel@tonic-gate /* 57007c478bd9Sstevel@tonic-gate * Have to handle _PC_NAME_MAX here, because the normal way 57017c478bd9Sstevel@tonic-gate * [fs_pathconf() -> VOP_STATVFS() -> ufs_statvfs()] 57027c478bd9Sstevel@tonic-gate * results in a lock ordering reversal between 57037c478bd9Sstevel@tonic-gate * ufs_lockfs_{begin,end}() and 57047c478bd9Sstevel@tonic-gate * ufs_thread_{suspend,continue}(). 57057c478bd9Sstevel@tonic-gate * 57067c478bd9Sstevel@tonic-gate * Keep in sync with ufs_statvfs(). 57077c478bd9Sstevel@tonic-gate */ 57087c478bd9Sstevel@tonic-gate case _PC_NAME_MAX: 57097c478bd9Sstevel@tonic-gate *valp = MAXNAMLEN; 57107c478bd9Sstevel@tonic-gate break; 57117c478bd9Sstevel@tonic-gate 57127c478bd9Sstevel@tonic-gate case _PC_FILESIZEBITS: 57137c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_lfflags & UFS_LARGEFILES) 57147c478bd9Sstevel@tonic-gate *valp = UFS_FILESIZE_BITS; 57157c478bd9Sstevel@tonic-gate else 57167c478bd9Sstevel@tonic-gate *valp = 32; 57177c478bd9Sstevel@tonic-gate break; 57187c478bd9Sstevel@tonic-gate 57197c478bd9Sstevel@tonic-gate case _PC_XATTR_EXISTS: 57207c478bd9Sstevel@tonic-gate if (vp->v_vfsp->vfs_flag & VFS_XATTR) { 57217c478bd9Sstevel@tonic-gate 572280d34432Sfrankho error = 572380d34432Sfrankho ufs_xattr_getattrdir(vp, &sip, LOOKUP_XATTR, cr); 57247c478bd9Sstevel@tonic-gate if (error == 0 && sip != NULL) { 57257c478bd9Sstevel@tonic-gate /* Start transaction */ 57267c478bd9Sstevel@tonic-gate if (ulp) { 57277c478bd9Sstevel@tonic-gate TRANS_BEGIN_CSYNC(ufsvfsp, issync, 57287c478bd9Sstevel@tonic-gate TOP_RMDIR, TOP_RMDIR_SIZE); 57297c478bd9Sstevel@tonic-gate } 57307c478bd9Sstevel@tonic-gate /* 57317c478bd9Sstevel@tonic-gate * Is directory empty 57327c478bd9Sstevel@tonic-gate */ 57337c478bd9Sstevel@tonic-gate rw_enter(&sip->i_rwlock, RW_WRITER); 57347c478bd9Sstevel@tonic-gate rw_enter(&sip->i_contents, RW_WRITER); 57357c478bd9Sstevel@tonic-gate if (ufs_xattrdirempty(sip, 573680d34432Sfrankho sip->i_number, CRED())) { 57377c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 57387c478bd9Sstevel@tonic-gate ufs_unhook_shadow(ip, sip); 57397c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 57407c478bd9Sstevel@tonic-gate 57417c478bd9Sstevel@tonic-gate *valp = 0; 57427c478bd9Sstevel@tonic-gate 57437c478bd9Sstevel@tonic-gate } else 57447c478bd9Sstevel@tonic-gate *valp = 1; 57457c478bd9Sstevel@tonic-gate rw_exit(&sip->i_contents); 57467c478bd9Sstevel@tonic-gate rw_exit(&sip->i_rwlock); 57477c478bd9Sstevel@tonic-gate if (ulp) { 57487c478bd9Sstevel@tonic-gate TRANS_END_CSYNC(ufsvfsp, error, issync, 57497c478bd9Sstevel@tonic-gate TOP_RMDIR, TOP_RMDIR_SIZE); 57507c478bd9Sstevel@tonic-gate } 57517c478bd9Sstevel@tonic-gate VN_RELE(ITOV(sip)); 57527c478bd9Sstevel@tonic-gate } else if (error == ENOENT) { 57537c478bd9Sstevel@tonic-gate *valp = 0; 57547c478bd9Sstevel@tonic-gate error = 0; 57557c478bd9Sstevel@tonic-gate } 57567c478bd9Sstevel@tonic-gate } else { 5757da6c28aaSamw error = fs_pathconf(vp, cmd, valp, cr, ct); 57587c478bd9Sstevel@tonic-gate } 57597c478bd9Sstevel@tonic-gate break; 57607c478bd9Sstevel@tonic-gate 57617c478bd9Sstevel@tonic-gate case _PC_ACL_ENABLED: 57627c478bd9Sstevel@tonic-gate *valp = _ACL_ACLENT_ENABLED; 57637c478bd9Sstevel@tonic-gate break; 57647c478bd9Sstevel@tonic-gate 57657c478bd9Sstevel@tonic-gate case _PC_MIN_HOLE_SIZE: 57667c478bd9Sstevel@tonic-gate *valp = (ulong_t)ip->i_fs->fs_bsize; 57677c478bd9Sstevel@tonic-gate break; 57687c478bd9Sstevel@tonic-gate 5769da6c28aaSamw case _PC_SATTR_ENABLED: 5770da6c28aaSamw case _PC_SATTR_EXISTS: 57719660e5cbSJanice Chang *valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 5772da6c28aaSamw (vp->v_type == VREG || vp->v_type == VDIR); 5773da6c28aaSamw break; 5774da6c28aaSamw 57753b862e9aSRoger A. Faulkner case _PC_TIMESTAMP_RESOLUTION: 57763b862e9aSRoger A. Faulkner /* 57773b862e9aSRoger A. Faulkner * UFS keeps only microsecond timestamp resolution. 57783b862e9aSRoger A. Faulkner * This is historical and will probably never change. 57793b862e9aSRoger A. Faulkner */ 57803b862e9aSRoger A. Faulkner *valp = 1000L; 57813b862e9aSRoger A. Faulkner break; 57823b862e9aSRoger A. Faulkner 57837c478bd9Sstevel@tonic-gate default: 5784da6c28aaSamw error = fs_pathconf(vp, cmd, valp, cr, ct); 57853b862e9aSRoger A. Faulkner break; 57867c478bd9Sstevel@tonic-gate } 57877c478bd9Sstevel@tonic-gate 57887c478bd9Sstevel@tonic-gate if (ulp != NULL) { 57897c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 57907c478bd9Sstevel@tonic-gate } 57917c478bd9Sstevel@tonic-gate return (error); 57927c478bd9Sstevel@tonic-gate } 57937c478bd9Sstevel@tonic-gate 57947c478bd9Sstevel@tonic-gate int ufs_pageio_writes, ufs_pageio_reads; 57957c478bd9Sstevel@tonic-gate 57967c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 57977c478bd9Sstevel@tonic-gate static int 57987c478bd9Sstevel@tonic-gate ufs_pageio(struct vnode *vp, page_t *pp, u_offset_t io_off, size_t io_len, 579980d5689fSPatrick Mooney int flags, struct cred *cr, caller_context_t *ct) 58007c478bd9Sstevel@tonic-gate { 58017c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 58027c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp; 58037c478bd9Sstevel@tonic-gate page_t *npp = NULL, *opp = NULL, *cpp = pp; 58047c478bd9Sstevel@tonic-gate struct buf *bp; 58057c478bd9Sstevel@tonic-gate daddr_t bn; 58067c478bd9Sstevel@tonic-gate size_t done_len = 0, cur_len = 0; 58077c478bd9Sstevel@tonic-gate int err = 0; 58087c478bd9Sstevel@tonic-gate int contig = 0; 58097c478bd9Sstevel@tonic-gate int dolock; 58107c478bd9Sstevel@tonic-gate int vmpss = 0; 5811bc69f433Saguzovsk struct ulockfs *ulp; 58127c478bd9Sstevel@tonic-gate 58137c478bd9Sstevel@tonic-gate if ((flags & B_READ) && pp != NULL && pp->p_vnode == vp && 58147c478bd9Sstevel@tonic-gate vp->v_mpssdata != NULL) { 58157c478bd9Sstevel@tonic-gate vmpss = 1; 58167c478bd9Sstevel@tonic-gate } 58177c478bd9Sstevel@tonic-gate 58187c478bd9Sstevel@tonic-gate dolock = (rw_owner(&ip->i_contents) != curthread); 58197c478bd9Sstevel@tonic-gate /* 58207c478bd9Sstevel@tonic-gate * We need a better check. Ideally, we would use another 58217c478bd9Sstevel@tonic-gate * vnodeops so that hlocked and forcibly unmounted file 58227c478bd9Sstevel@tonic-gate * systems would return EIO where appropriate and w/o the 58237c478bd9Sstevel@tonic-gate * need for these checks. 58247c478bd9Sstevel@tonic-gate */ 58257c478bd9Sstevel@tonic-gate if ((ufsvfsp = ip->i_ufsvfs) == NULL) 58267c478bd9Sstevel@tonic-gate return (EIO); 58277c478bd9Sstevel@tonic-gate 5828bc69f433Saguzovsk /* 5829bc69f433Saguzovsk * For vmpss (pp can be NULL) case respect the quiesce protocol. 5830bc69f433Saguzovsk * ul_lock must be taken before locking pages so we can't use it here 5831bc69f433Saguzovsk * if pp is non NULL because segvn already locked pages 5832bc69f433Saguzovsk * SE_EXCL. Instead we rely on the fact that a forced umount or 5833bc69f433Saguzovsk * applying a filesystem lock via ufs_fiolfs() will block in the 5834bc69f433Saguzovsk * implicit call to ufs_flush() until we unlock the pages after the 5835bc69f433Saguzovsk * return to segvn. Other ufs_quiesce() callers keep ufs_quiesce_pend 5836bc69f433Saguzovsk * above 0 until they are done. We have to be careful not to increment 5837bc69f433Saguzovsk * ul_vnops_cnt here after forceful unmount hlocks the file system. 5838bc69f433Saguzovsk * 5839bc69f433Saguzovsk * If pp is NULL use ul_lock to make sure we don't increment 5840bc69f433Saguzovsk * ul_vnops_cnt after forceful unmount hlocks the file system. 5841bc69f433Saguzovsk */ 5842bc69f433Saguzovsk if (vmpss || pp == NULL) { 5843bc69f433Saguzovsk ulp = &ufsvfsp->vfs_ulockfs; 5844bc69f433Saguzovsk if (pp == NULL) 5845bc69f433Saguzovsk mutex_enter(&ulp->ul_lock); 5846bc69f433Saguzovsk if (ulp->ul_fs_lock & ULOCKFS_GETREAD_MASK) { 5847bc69f433Saguzovsk if (pp == NULL) { 5848bc69f433Saguzovsk mutex_exit(&ulp->ul_lock); 5849bc69f433Saguzovsk } 5850bc69f433Saguzovsk return (vmpss ? EIO : EINVAL); 5851bc69f433Saguzovsk } 58521a5e258fSJosef 'Jeff' Sipek atomic_inc_ulong(&ulp->ul_vnops_cnt); 5853bc69f433Saguzovsk if (pp == NULL) 5854bc69f433Saguzovsk mutex_exit(&ulp->ul_lock); 5855bc69f433Saguzovsk if (ufs_quiesce_pend) { 58561a5e258fSJosef 'Jeff' Sipek if (!atomic_dec_ulong_nv(&ulp->ul_vnops_cnt)) 5857bc69f433Saguzovsk cv_broadcast(&ulp->ul_cv); 5858bc69f433Saguzovsk return (vmpss ? EIO : EINVAL); 5859bc69f433Saguzovsk } 5860bc69f433Saguzovsk } 5861bc69f433Saguzovsk 58627c478bd9Sstevel@tonic-gate if (dolock) { 58637c478bd9Sstevel@tonic-gate /* 58647c478bd9Sstevel@tonic-gate * segvn may call VOP_PAGEIO() instead of VOP_GETPAGE() to 58657c478bd9Sstevel@tonic-gate * handle a fault against a segment that maps vnode pages with 58667c478bd9Sstevel@tonic-gate * large mappings. Segvn creates pages and holds them locked 58677c478bd9Sstevel@tonic-gate * SE_EXCL during VOP_PAGEIO() call. In this case we have to 58687c478bd9Sstevel@tonic-gate * use rw_tryenter() to avoid a potential deadlock since in 58697c478bd9Sstevel@tonic-gate * lock order i_contents needs to be taken first. 58707c478bd9Sstevel@tonic-gate * Segvn will retry via VOP_GETPAGE() if VOP_PAGEIO() fails. 58717c478bd9Sstevel@tonic-gate */ 58727c478bd9Sstevel@tonic-gate if (!vmpss) { 58737c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 58747c478bd9Sstevel@tonic-gate } else if (!rw_tryenter(&ip->i_contents, RW_READER)) { 58751a5e258fSJosef 'Jeff' Sipek if (!atomic_dec_ulong_nv(&ulp->ul_vnops_cnt)) 5876bc69f433Saguzovsk cv_broadcast(&ulp->ul_cv); 58777c478bd9Sstevel@tonic-gate return (EDEADLK); 58787c478bd9Sstevel@tonic-gate } 58797c478bd9Sstevel@tonic-gate } 58807c478bd9Sstevel@tonic-gate 588137fbc076Saguzovsk /* 588237fbc076Saguzovsk * Return an error to segvn because the pagefault request is beyond 588337fbc076Saguzovsk * PAGESIZE rounded EOF. 588437fbc076Saguzovsk */ 588537fbc076Saguzovsk if (vmpss && btopr(io_off + io_len) > btopr(ip->i_size)) { 588637fbc076Saguzovsk if (dolock) 588737fbc076Saguzovsk rw_exit(&ip->i_contents); 58881a5e258fSJosef 'Jeff' Sipek if (!atomic_dec_ulong_nv(&ulp->ul_vnops_cnt)) 5889bc69f433Saguzovsk cv_broadcast(&ulp->ul_cv); 589037fbc076Saguzovsk return (EFAULT); 589137fbc076Saguzovsk } 589237fbc076Saguzovsk 58937c478bd9Sstevel@tonic-gate if (pp == NULL) { 58947c478bd9Sstevel@tonic-gate if (bmap_has_holes(ip)) { 58957c478bd9Sstevel@tonic-gate err = ENOSYS; 58967c478bd9Sstevel@tonic-gate } else { 58977c478bd9Sstevel@tonic-gate err = EINVAL; 58987c478bd9Sstevel@tonic-gate } 58997c478bd9Sstevel@tonic-gate if (dolock) 59007c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 59011a5e258fSJosef 'Jeff' Sipek if (!atomic_dec_ulong_nv(&ulp->ul_vnops_cnt)) 5902bc69f433Saguzovsk cv_broadcast(&ulp->ul_cv); 59037c478bd9Sstevel@tonic-gate return (err); 59047c478bd9Sstevel@tonic-gate } 59057c478bd9Sstevel@tonic-gate 59067c478bd9Sstevel@tonic-gate /* 59077c478bd9Sstevel@tonic-gate * Break the io request into chunks, one for each contiguous 59087c478bd9Sstevel@tonic-gate * stretch of disk blocks in the target file. 59097c478bd9Sstevel@tonic-gate */ 59107c478bd9Sstevel@tonic-gate while (done_len < io_len) { 59117c478bd9Sstevel@tonic-gate ASSERT(cpp); 59127c478bd9Sstevel@tonic-gate contig = 0; 59137c478bd9Sstevel@tonic-gate if (err = bmap_read(ip, (u_offset_t)(io_off + done_len), 591480d34432Sfrankho &bn, &contig)) 59157c478bd9Sstevel@tonic-gate break; 59167c478bd9Sstevel@tonic-gate 59177c478bd9Sstevel@tonic-gate if (bn == UFS_HOLE) { /* No holey swapfiles */ 59187c478bd9Sstevel@tonic-gate if (vmpss) { 59197c478bd9Sstevel@tonic-gate err = EFAULT; 59207c478bd9Sstevel@tonic-gate break; 59217c478bd9Sstevel@tonic-gate } 59227c478bd9Sstevel@tonic-gate err = ufs_fault(ITOV(ip), "ufs_pageio: bn == UFS_HOLE"); 59237c478bd9Sstevel@tonic-gate break; 59247c478bd9Sstevel@tonic-gate } 59257c478bd9Sstevel@tonic-gate 59267c478bd9Sstevel@tonic-gate cur_len = MIN(io_len - done_len, contig); 59277c478bd9Sstevel@tonic-gate /* 59287c478bd9Sstevel@tonic-gate * Zero out a page beyond EOF, when the last block of 59297c478bd9Sstevel@tonic-gate * a file is a UFS fragment so that ufs_pageio() can be used 59307c478bd9Sstevel@tonic-gate * instead of ufs_getpage() to handle faults against 59317c478bd9Sstevel@tonic-gate * segvn segments that use large pages. 59327c478bd9Sstevel@tonic-gate */ 59337c478bd9Sstevel@tonic-gate page_list_break(&cpp, &npp, btopr(cur_len)); 59347c478bd9Sstevel@tonic-gate if ((flags & B_READ) && (cur_len & PAGEOFFSET)) { 59357c478bd9Sstevel@tonic-gate size_t xlen = cur_len & PAGEOFFSET; 59367c478bd9Sstevel@tonic-gate pagezero(cpp->p_prev, xlen, PAGESIZE - xlen); 59377c478bd9Sstevel@tonic-gate } 59387c478bd9Sstevel@tonic-gate 59397c478bd9Sstevel@tonic-gate bp = pageio_setup(cpp, cur_len, ip->i_devvp, flags); 59407c478bd9Sstevel@tonic-gate ASSERT(bp != NULL); 59417c478bd9Sstevel@tonic-gate 59427c478bd9Sstevel@tonic-gate bp->b_edev = ip->i_dev; 59437c478bd9Sstevel@tonic-gate bp->b_dev = cmpdev(ip->i_dev); 59447c478bd9Sstevel@tonic-gate bp->b_blkno = bn; 59457c478bd9Sstevel@tonic-gate bp->b_un.b_addr = (caddr_t)0; 59467c478bd9Sstevel@tonic-gate bp->b_file = ip->i_vnode; 59477c478bd9Sstevel@tonic-gate 5948d3d50737SRafael Vanoni ufsvfsp->vfs_iotstamp = ddi_get_lbolt(); 59497c478bd9Sstevel@tonic-gate ub.ub_pageios.value.ul++; 59507c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_snapshot) 59517c478bd9Sstevel@tonic-gate fssnap_strategy(&(ufsvfsp->vfs_snapshot), bp); 59527c478bd9Sstevel@tonic-gate else 59537c478bd9Sstevel@tonic-gate (void) bdev_strategy(bp); 59547c478bd9Sstevel@tonic-gate 59557c478bd9Sstevel@tonic-gate if (flags & B_READ) 59567c478bd9Sstevel@tonic-gate ufs_pageio_reads++; 59577c478bd9Sstevel@tonic-gate else 59587c478bd9Sstevel@tonic-gate ufs_pageio_writes++; 59597c478bd9Sstevel@tonic-gate if (flags & B_READ) 59607c478bd9Sstevel@tonic-gate lwp_stat_update(LWP_STAT_INBLK, 1); 59617c478bd9Sstevel@tonic-gate else 59627c478bd9Sstevel@tonic-gate lwp_stat_update(LWP_STAT_OUBLK, 1); 59637c478bd9Sstevel@tonic-gate /* 59647c478bd9Sstevel@tonic-gate * If the request is not B_ASYNC, wait for i/o to complete 59657c478bd9Sstevel@tonic-gate * and re-assemble the page list to return to the caller. 59667c478bd9Sstevel@tonic-gate * If it is B_ASYNC we leave the page list in pieces and 59677c478bd9Sstevel@tonic-gate * cleanup() will dispose of them. 59687c478bd9Sstevel@tonic-gate */ 59697c478bd9Sstevel@tonic-gate if ((flags & B_ASYNC) == 0) { 59707c478bd9Sstevel@tonic-gate err = biowait(bp); 59717c478bd9Sstevel@tonic-gate pageio_done(bp); 59727c478bd9Sstevel@tonic-gate if (err) 59737c478bd9Sstevel@tonic-gate break; 59747c478bd9Sstevel@tonic-gate page_list_concat(&opp, &cpp); 59757c478bd9Sstevel@tonic-gate } 59767c478bd9Sstevel@tonic-gate cpp = npp; 59777c478bd9Sstevel@tonic-gate npp = NULL; 59787c478bd9Sstevel@tonic-gate if (flags & B_READ) 59797c478bd9Sstevel@tonic-gate cur_len = P2ROUNDUP_TYPED(cur_len, PAGESIZE, size_t); 59807c478bd9Sstevel@tonic-gate done_len += cur_len; 59817c478bd9Sstevel@tonic-gate } 59827c478bd9Sstevel@tonic-gate ASSERT(err || (cpp == NULL && npp == NULL && done_len == io_len)); 59837c478bd9Sstevel@tonic-gate if (err) { 59847c478bd9Sstevel@tonic-gate if (flags & B_ASYNC) { 59857c478bd9Sstevel@tonic-gate /* Cleanup unprocessed parts of list */ 59867c478bd9Sstevel@tonic-gate page_list_concat(&cpp, &npp); 59877c478bd9Sstevel@tonic-gate if (flags & B_READ) 59887c478bd9Sstevel@tonic-gate pvn_read_done(cpp, B_ERROR); 59897c478bd9Sstevel@tonic-gate else 59907c478bd9Sstevel@tonic-gate pvn_write_done(cpp, B_ERROR); 59917c478bd9Sstevel@tonic-gate } else { 59927c478bd9Sstevel@tonic-gate /* Re-assemble list and let caller clean up */ 59937c478bd9Sstevel@tonic-gate page_list_concat(&opp, &cpp); 59947c478bd9Sstevel@tonic-gate page_list_concat(&opp, &npp); 59957c478bd9Sstevel@tonic-gate } 59967c478bd9Sstevel@tonic-gate } 5997bc69f433Saguzovsk 5998bc69f433Saguzovsk if (vmpss && !(ip->i_flag & IACC) && !ULOCKFS_IS_NOIACC(ulp) && 5999bc69f433Saguzovsk ufsvfsp->vfs_fs->fs_ronly == 0 && !ufsvfsp->vfs_noatime) { 6000bc69f433Saguzovsk mutex_enter(&ip->i_tlock); 6001bc69f433Saguzovsk ip->i_flag |= IACC; 6002bc69f433Saguzovsk ITIMES_NOLOCK(ip); 6003bc69f433Saguzovsk mutex_exit(&ip->i_tlock); 6004bc69f433Saguzovsk } 6005bc69f433Saguzovsk 60067c478bd9Sstevel@tonic-gate if (dolock) 60077c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 60081a5e258fSJosef 'Jeff' Sipek if (vmpss && !atomic_dec_ulong_nv(&ulp->ul_vnops_cnt)) 6009bc69f433Saguzovsk cv_broadcast(&ulp->ul_cv); 60107c478bd9Sstevel@tonic-gate return (err); 60117c478bd9Sstevel@tonic-gate } 60127c478bd9Sstevel@tonic-gate 60137c478bd9Sstevel@tonic-gate /* 60147c478bd9Sstevel@tonic-gate * Called when the kernel is in a frozen state to dump data 60157c478bd9Sstevel@tonic-gate * directly to the device. It uses a private dump data structure, 60167c478bd9Sstevel@tonic-gate * set up by dump_ctl, to locate the correct disk block to which to dump. 60177c478bd9Sstevel@tonic-gate */ 6018da6c28aaSamw /*ARGSUSED*/ 60197c478bd9Sstevel@tonic-gate static int 6020d7334e51Srm ufs_dump(vnode_t *vp, caddr_t addr, offset_t ldbn, offset_t dblks, 6021d7334e51Srm caller_context_t *ct) 60227c478bd9Sstevel@tonic-gate { 60237c478bd9Sstevel@tonic-gate u_offset_t file_size; 60247c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 60257c478bd9Sstevel@tonic-gate struct fs *fs = ip->i_fs; 60267c478bd9Sstevel@tonic-gate daddr_t dbn, lfsbn; 60277c478bd9Sstevel@tonic-gate int disk_blks = fs->fs_bsize >> DEV_BSHIFT; 60287c478bd9Sstevel@tonic-gate int error = 0; 60297c478bd9Sstevel@tonic-gate int ndbs, nfsbs; 60307c478bd9Sstevel@tonic-gate 60317c478bd9Sstevel@tonic-gate /* 60327c478bd9Sstevel@tonic-gate * forced unmount case 60337c478bd9Sstevel@tonic-gate */ 60347c478bd9Sstevel@tonic-gate if (ip->i_ufsvfs == NULL) 60357c478bd9Sstevel@tonic-gate return (EIO); 60367c478bd9Sstevel@tonic-gate /* 60377c478bd9Sstevel@tonic-gate * Validate the inode that it has not been modified since 60387c478bd9Sstevel@tonic-gate * the dump structure is allocated. 60397c478bd9Sstevel@tonic-gate */ 60407c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 60417c478bd9Sstevel@tonic-gate if ((dump_info == NULL) || 60427c478bd9Sstevel@tonic-gate (dump_info->ip != ip) || 60437c478bd9Sstevel@tonic-gate (dump_info->time.tv_sec != ip->i_mtime.tv_sec) || 60447c478bd9Sstevel@tonic-gate (dump_info->time.tv_usec != ip->i_mtime.tv_usec)) { 60457c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 60467c478bd9Sstevel@tonic-gate return (-1); 60477c478bd9Sstevel@tonic-gate } 60487c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 60497c478bd9Sstevel@tonic-gate 60507c478bd9Sstevel@tonic-gate /* 60517c478bd9Sstevel@tonic-gate * See that the file has room for this write 60527c478bd9Sstevel@tonic-gate */ 60537c478bd9Sstevel@tonic-gate UFS_GET_ISIZE(&file_size, ip); 60547c478bd9Sstevel@tonic-gate 6055d7334e51Srm if (ldbtob(ldbn + dblks) > file_size) 60567c478bd9Sstevel@tonic-gate return (ENOSPC); 60577c478bd9Sstevel@tonic-gate 60587c478bd9Sstevel@tonic-gate /* 60597c478bd9Sstevel@tonic-gate * Find the physical disk block numbers from the dump 60607c478bd9Sstevel@tonic-gate * private data structure directly and write out the data 60617c478bd9Sstevel@tonic-gate * in contiguous block lumps 60627c478bd9Sstevel@tonic-gate */ 60637c478bd9Sstevel@tonic-gate while (dblks > 0 && !error) { 6064d7334e51Srm lfsbn = (daddr_t)lblkno(fs, ldbtob(ldbn)); 60657c478bd9Sstevel@tonic-gate dbn = fsbtodb(fs, dump_info->dblk[lfsbn]) + ldbn % disk_blks; 60667c478bd9Sstevel@tonic-gate nfsbs = 1; 60677c478bd9Sstevel@tonic-gate ndbs = disk_blks - ldbn % disk_blks; 60687c478bd9Sstevel@tonic-gate while (ndbs < dblks && fsbtodb(fs, dump_info->dblk[lfsbn + 60697c478bd9Sstevel@tonic-gate nfsbs]) == dbn + ndbs) { 60707c478bd9Sstevel@tonic-gate nfsbs++; 60717c478bd9Sstevel@tonic-gate ndbs += disk_blks; 60727c478bd9Sstevel@tonic-gate } 60737c478bd9Sstevel@tonic-gate if (ndbs > dblks) 60747c478bd9Sstevel@tonic-gate ndbs = dblks; 60757c478bd9Sstevel@tonic-gate error = bdev_dump(ip->i_dev, addr, dbn, ndbs); 60767c478bd9Sstevel@tonic-gate addr += ldbtob((offset_t)ndbs); 60777c478bd9Sstevel@tonic-gate dblks -= ndbs; 60787c478bd9Sstevel@tonic-gate ldbn += ndbs; 60797c478bd9Sstevel@tonic-gate } 60807c478bd9Sstevel@tonic-gate return (error); 60817c478bd9Sstevel@tonic-gate 60827c478bd9Sstevel@tonic-gate } 60837c478bd9Sstevel@tonic-gate 60847c478bd9Sstevel@tonic-gate /* 60857c478bd9Sstevel@tonic-gate * Prepare the file system before and after the dump operation. 60867c478bd9Sstevel@tonic-gate * 60877c478bd9Sstevel@tonic-gate * action = DUMP_ALLOC: 60887c478bd9Sstevel@tonic-gate * Preparation before dump, allocate dump private data structure 60897c478bd9Sstevel@tonic-gate * to hold all the direct and indirect block info for dump. 60907c478bd9Sstevel@tonic-gate * 60917c478bd9Sstevel@tonic-gate * action = DUMP_FREE: 60927c478bd9Sstevel@tonic-gate * Clean up after dump, deallocate the dump private data structure. 60937c478bd9Sstevel@tonic-gate * 60947c478bd9Sstevel@tonic-gate * action = DUMP_SCAN: 60957c478bd9Sstevel@tonic-gate * Scan dump_info for *blkp DEV_BSIZE blocks of contig fs space; 60967c478bd9Sstevel@tonic-gate * if found, the starting file-relative DEV_BSIZE lbn is written 60977c478bd9Sstevel@tonic-gate * to *bklp; that lbn is intended for use with VOP_DUMP() 60987c478bd9Sstevel@tonic-gate */ 6099da6c28aaSamw /*ARGSUSED*/ 61007c478bd9Sstevel@tonic-gate static int 6101d7334e51Srm ufs_dumpctl(vnode_t *vp, int action, offset_t *blkp, caller_context_t *ct) 61027c478bd9Sstevel@tonic-gate { 61037c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 61047c478bd9Sstevel@tonic-gate ufsvfs_t *ufsvfsp = ip->i_ufsvfs; 61057c478bd9Sstevel@tonic-gate struct fs *fs; 61067c478bd9Sstevel@tonic-gate daddr32_t *dblk, *storeblk; 61077c478bd9Sstevel@tonic-gate daddr32_t *nextblk, *endblk; 61087c478bd9Sstevel@tonic-gate struct buf *bp; 61097c478bd9Sstevel@tonic-gate int i, entry, entries; 61107c478bd9Sstevel@tonic-gate int n, ncontig; 61117c478bd9Sstevel@tonic-gate 61127c478bd9Sstevel@tonic-gate /* 61137c478bd9Sstevel@tonic-gate * check for forced unmount 61147c478bd9Sstevel@tonic-gate */ 61157c478bd9Sstevel@tonic-gate if (ufsvfsp == NULL) 61167c478bd9Sstevel@tonic-gate return (EIO); 61177c478bd9Sstevel@tonic-gate 61187c478bd9Sstevel@tonic-gate if (action == DUMP_ALLOC) { 61197c478bd9Sstevel@tonic-gate /* 61207c478bd9Sstevel@tonic-gate * alloc and record dump_info 61217c478bd9Sstevel@tonic-gate */ 61227c478bd9Sstevel@tonic-gate if (dump_info != NULL) 61237c478bd9Sstevel@tonic-gate return (EINVAL); 61247c478bd9Sstevel@tonic-gate 61257c478bd9Sstevel@tonic-gate ASSERT(vp->v_type == VREG); 61267c478bd9Sstevel@tonic-gate fs = ufsvfsp->vfs_fs; 61277c478bd9Sstevel@tonic-gate 61287c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 61297c478bd9Sstevel@tonic-gate 61307c478bd9Sstevel@tonic-gate if (bmap_has_holes(ip)) { 61317c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 61327c478bd9Sstevel@tonic-gate return (EFAULT); 61337c478bd9Sstevel@tonic-gate } 61347c478bd9Sstevel@tonic-gate 61357c478bd9Sstevel@tonic-gate /* 61367c478bd9Sstevel@tonic-gate * calculate and allocate space needed according to i_size 61377c478bd9Sstevel@tonic-gate */ 61387c478bd9Sstevel@tonic-gate entries = (int)lblkno(fs, blkroundup(fs, ip->i_size)); 613980d34432Sfrankho dump_info = kmem_alloc(sizeof (struct dump) + 614080d34432Sfrankho (entries - 1) * sizeof (daddr32_t), KM_NOSLEEP); 614180d34432Sfrankho if (dump_info == NULL) { 614280d34432Sfrankho rw_exit(&ip->i_contents); 614380d34432Sfrankho return (ENOMEM); 61447c478bd9Sstevel@tonic-gate } 61457c478bd9Sstevel@tonic-gate 61467c478bd9Sstevel@tonic-gate /* Start saving the info */ 61477c478bd9Sstevel@tonic-gate dump_info->fsbs = entries; 61487c478bd9Sstevel@tonic-gate dump_info->ip = ip; 61497c478bd9Sstevel@tonic-gate storeblk = &dump_info->dblk[0]; 61507c478bd9Sstevel@tonic-gate 61517c478bd9Sstevel@tonic-gate /* Direct Blocks */ 61527c478bd9Sstevel@tonic-gate for (entry = 0; entry < NDADDR && entry < entries; entry++) 61537c478bd9Sstevel@tonic-gate *storeblk++ = ip->i_db[entry]; 61547c478bd9Sstevel@tonic-gate 61557c478bd9Sstevel@tonic-gate /* Indirect Blocks */ 61567c478bd9Sstevel@tonic-gate for (i = 0; i < NIADDR; i++) { 61577c478bd9Sstevel@tonic-gate int error = 0; 61587c478bd9Sstevel@tonic-gate 61597c478bd9Sstevel@tonic-gate bp = UFS_BREAD(ufsvfsp, 616080d34432Sfrankho ip->i_dev, fsbtodb(fs, ip->i_ib[i]), fs->fs_bsize); 61617c478bd9Sstevel@tonic-gate if (bp->b_flags & B_ERROR) 61627c478bd9Sstevel@tonic-gate error = EIO; 61637c478bd9Sstevel@tonic-gate else { 61647c478bd9Sstevel@tonic-gate dblk = bp->b_un.b_daddr; 61657c478bd9Sstevel@tonic-gate if ((storeblk = save_dblks(ip, ufsvfsp, 61667c478bd9Sstevel@tonic-gate storeblk, dblk, i, entries)) == NULL) 61677c478bd9Sstevel@tonic-gate error = EIO; 61687c478bd9Sstevel@tonic-gate } 61697c478bd9Sstevel@tonic-gate 61707c478bd9Sstevel@tonic-gate brelse(bp); 61717c478bd9Sstevel@tonic-gate 61727c478bd9Sstevel@tonic-gate if (error != 0) { 61737c478bd9Sstevel@tonic-gate kmem_free(dump_info, sizeof (struct dump) + 61747c478bd9Sstevel@tonic-gate (entries - 1) * sizeof (daddr32_t)); 61757c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 61767c478bd9Sstevel@tonic-gate dump_info = NULL; 61777c478bd9Sstevel@tonic-gate return (error); 61787c478bd9Sstevel@tonic-gate } 61797c478bd9Sstevel@tonic-gate } 61807c478bd9Sstevel@tonic-gate /* and time stamp the information */ 61817c478bd9Sstevel@tonic-gate mutex_enter(&ip->i_tlock); 61827c478bd9Sstevel@tonic-gate dump_info->time = ip->i_mtime; 61837c478bd9Sstevel@tonic-gate mutex_exit(&ip->i_tlock); 61847c478bd9Sstevel@tonic-gate 61857c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 61867c478bd9Sstevel@tonic-gate } else if (action == DUMP_FREE) { 61877c478bd9Sstevel@tonic-gate /* 61887c478bd9Sstevel@tonic-gate * free dump_info 61897c478bd9Sstevel@tonic-gate */ 61907c478bd9Sstevel@tonic-gate if (dump_info == NULL) 61917c478bd9Sstevel@tonic-gate return (EINVAL); 61927c478bd9Sstevel@tonic-gate entries = dump_info->fsbs - 1; 61937c478bd9Sstevel@tonic-gate kmem_free(dump_info, sizeof (struct dump) + 61947c478bd9Sstevel@tonic-gate entries * sizeof (daddr32_t)); 61957c478bd9Sstevel@tonic-gate dump_info = NULL; 61967c478bd9Sstevel@tonic-gate } else if (action == DUMP_SCAN) { 61977c478bd9Sstevel@tonic-gate /* 61987c478bd9Sstevel@tonic-gate * scan dump_info 61997c478bd9Sstevel@tonic-gate */ 62007c478bd9Sstevel@tonic-gate if (dump_info == NULL) 62017c478bd9Sstevel@tonic-gate return (EINVAL); 62027c478bd9Sstevel@tonic-gate 62037c478bd9Sstevel@tonic-gate dblk = dump_info->dblk; 62047c478bd9Sstevel@tonic-gate nextblk = dblk + 1; 62057c478bd9Sstevel@tonic-gate endblk = dblk + dump_info->fsbs - 1; 62067c478bd9Sstevel@tonic-gate fs = ufsvfsp->vfs_fs; 62077c478bd9Sstevel@tonic-gate ncontig = *blkp >> (fs->fs_bshift - DEV_BSHIFT); 62087c478bd9Sstevel@tonic-gate 62097c478bd9Sstevel@tonic-gate /* 62107c478bd9Sstevel@tonic-gate * scan dblk[] entries; contig fs space is found when: 62117c478bd9Sstevel@tonic-gate * ((current blkno + frags per block) == next blkno) 62127c478bd9Sstevel@tonic-gate */ 62137c478bd9Sstevel@tonic-gate n = 0; 62147c478bd9Sstevel@tonic-gate while (n < ncontig && dblk < endblk) { 62157c478bd9Sstevel@tonic-gate if ((*dblk + fs->fs_frag) == *nextblk) 62167c478bd9Sstevel@tonic-gate n++; 62177c478bd9Sstevel@tonic-gate else 62187c478bd9Sstevel@tonic-gate n = 0; 62197c478bd9Sstevel@tonic-gate dblk++; 62207c478bd9Sstevel@tonic-gate nextblk++; 62217c478bd9Sstevel@tonic-gate } 62227c478bd9Sstevel@tonic-gate 62237c478bd9Sstevel@tonic-gate /* 62247c478bd9Sstevel@tonic-gate * index is where size bytes of contig space begins; 62257c478bd9Sstevel@tonic-gate * conversion from index to the file's DEV_BSIZE lbn 62267c478bd9Sstevel@tonic-gate * is equivalent to: (index * fs_bsize) / DEV_BSIZE 62277c478bd9Sstevel@tonic-gate */ 62287c478bd9Sstevel@tonic-gate if (n == ncontig) { 62297c478bd9Sstevel@tonic-gate i = (dblk - dump_info->dblk) - ncontig; 62307c478bd9Sstevel@tonic-gate *blkp = i << (fs->fs_bshift - DEV_BSHIFT); 62317c478bd9Sstevel@tonic-gate } else 62327c478bd9Sstevel@tonic-gate return (EFAULT); 62337c478bd9Sstevel@tonic-gate } 62347c478bd9Sstevel@tonic-gate return (0); 62357c478bd9Sstevel@tonic-gate } 62367c478bd9Sstevel@tonic-gate 62377c478bd9Sstevel@tonic-gate /* 62387c478bd9Sstevel@tonic-gate * Recursive helper function for ufs_dumpctl(). It follows the indirect file 62397c478bd9Sstevel@tonic-gate * system blocks until it reaches the the disk block addresses, which are 62407c478bd9Sstevel@tonic-gate * then stored into the given buffer, storeblk. 62417c478bd9Sstevel@tonic-gate */ 62427c478bd9Sstevel@tonic-gate static daddr32_t * 62437c478bd9Sstevel@tonic-gate save_dblks(struct inode *ip, struct ufsvfs *ufsvfsp, daddr32_t *storeblk, 62447c478bd9Sstevel@tonic-gate daddr32_t *dblk, int level, int entries) 62457c478bd9Sstevel@tonic-gate { 62467c478bd9Sstevel@tonic-gate struct fs *fs = ufsvfsp->vfs_fs; 62477c478bd9Sstevel@tonic-gate struct buf *bp; 62487c478bd9Sstevel@tonic-gate int i; 62497c478bd9Sstevel@tonic-gate 62507c478bd9Sstevel@tonic-gate if (level == 0) { 62517c478bd9Sstevel@tonic-gate for (i = 0; i < NINDIR(fs); i++) { 62527c478bd9Sstevel@tonic-gate if (storeblk - dump_info->dblk >= entries) 62537c478bd9Sstevel@tonic-gate break; 62547c478bd9Sstevel@tonic-gate *storeblk++ = dblk[i]; 62557c478bd9Sstevel@tonic-gate } 62567c478bd9Sstevel@tonic-gate return (storeblk); 62577c478bd9Sstevel@tonic-gate } 62587c478bd9Sstevel@tonic-gate for (i = 0; i < NINDIR(fs); i++) { 62597c478bd9Sstevel@tonic-gate if (storeblk - dump_info->dblk >= entries) 62607c478bd9Sstevel@tonic-gate break; 62617c478bd9Sstevel@tonic-gate bp = UFS_BREAD(ufsvfsp, 626280d34432Sfrankho ip->i_dev, fsbtodb(fs, dblk[i]), fs->fs_bsize); 62637c478bd9Sstevel@tonic-gate if (bp->b_flags & B_ERROR) { 62647c478bd9Sstevel@tonic-gate brelse(bp); 62657c478bd9Sstevel@tonic-gate return (NULL); 62667c478bd9Sstevel@tonic-gate } 62677c478bd9Sstevel@tonic-gate storeblk = save_dblks(ip, ufsvfsp, storeblk, bp->b_un.b_daddr, 62687c478bd9Sstevel@tonic-gate level - 1, entries); 62697c478bd9Sstevel@tonic-gate brelse(bp); 62707c478bd9Sstevel@tonic-gate 62717c478bd9Sstevel@tonic-gate if (storeblk == NULL) 62727c478bd9Sstevel@tonic-gate return (NULL); 62737c478bd9Sstevel@tonic-gate } 62747c478bd9Sstevel@tonic-gate return (storeblk); 62757c478bd9Sstevel@tonic-gate } 62767c478bd9Sstevel@tonic-gate 62777c478bd9Sstevel@tonic-gate /* ARGSUSED */ 62787c478bd9Sstevel@tonic-gate static int 62797c478bd9Sstevel@tonic-gate ufs_getsecattr(struct vnode *vp, vsecattr_t *vsap, int flag, 628080d5689fSPatrick Mooney struct cred *cr, caller_context_t *ct) 62817c478bd9Sstevel@tonic-gate { 62827c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 62837c478bd9Sstevel@tonic-gate struct ulockfs *ulp; 62847c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = ip->i_ufsvfs; 62857c478bd9Sstevel@tonic-gate ulong_t vsa_mask = vsap->vsa_mask; 62867c478bd9Sstevel@tonic-gate int err = EINVAL; 62877c478bd9Sstevel@tonic-gate 62887c478bd9Sstevel@tonic-gate vsa_mask &= (VSA_ACL | VSA_ACLCNT | VSA_DFACL | VSA_DFACLCNT); 62897c478bd9Sstevel@tonic-gate 62907c478bd9Sstevel@tonic-gate /* 62917c478bd9Sstevel@tonic-gate * Only grab locks if needed - they're not needed to check vsa_mask 62927c478bd9Sstevel@tonic-gate * or if the mask contains no acl flags. 62937c478bd9Sstevel@tonic-gate */ 62947c478bd9Sstevel@tonic-gate if (vsa_mask != 0) { 62957c478bd9Sstevel@tonic-gate if (err = ufs_lockfs_begin(ufsvfsp, &ulp, 62967c478bd9Sstevel@tonic-gate ULOCKFS_GETATTR_MASK)) 62977c478bd9Sstevel@tonic-gate return (err); 62987c478bd9Sstevel@tonic-gate 62997c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_READER); 63007c478bd9Sstevel@tonic-gate err = ufs_acl_get(ip, vsap, flag, cr); 63017c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 63027c478bd9Sstevel@tonic-gate 63037c478bd9Sstevel@tonic-gate if (ulp) 63047c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 63057c478bd9Sstevel@tonic-gate } 63067c478bd9Sstevel@tonic-gate return (err); 63077c478bd9Sstevel@tonic-gate } 63087c478bd9Sstevel@tonic-gate 63097c478bd9Sstevel@tonic-gate /* ARGSUSED */ 63107c478bd9Sstevel@tonic-gate static int 6311da6c28aaSamw ufs_setsecattr(struct vnode *vp, vsecattr_t *vsap, int flag, struct cred *cr, 631280d5689fSPatrick Mooney caller_context_t *ct) 63137c478bd9Sstevel@tonic-gate { 63147c478bd9Sstevel@tonic-gate struct inode *ip = VTOI(vp); 63157c478bd9Sstevel@tonic-gate struct ulockfs *ulp = NULL; 63167c478bd9Sstevel@tonic-gate struct ufsvfs *ufsvfsp = VTOI(vp)->i_ufsvfs; 63177c478bd9Sstevel@tonic-gate ulong_t vsa_mask = vsap->vsa_mask; 63187c478bd9Sstevel@tonic-gate int err; 63197c478bd9Sstevel@tonic-gate int haverwlock = 1; 63207c478bd9Sstevel@tonic-gate int trans_size; 63217c478bd9Sstevel@tonic-gate int donetrans = 0; 63227c478bd9Sstevel@tonic-gate int retry = 1; 63237c478bd9Sstevel@tonic-gate 63247c478bd9Sstevel@tonic-gate ASSERT(RW_LOCK_HELD(&ip->i_rwlock)); 63257c478bd9Sstevel@tonic-gate 63267c478bd9Sstevel@tonic-gate /* Abort now if the request is either empty or invalid. */ 63277c478bd9Sstevel@tonic-gate vsa_mask &= (VSA_ACL | VSA_ACLCNT | VSA_DFACL | VSA_DFACLCNT); 63287c478bd9Sstevel@tonic-gate if ((vsa_mask == 0) || 63297c478bd9Sstevel@tonic-gate ((vsap->vsa_aclentp == NULL) && 63307c478bd9Sstevel@tonic-gate (vsap->vsa_dfaclentp == NULL))) { 63317c478bd9Sstevel@tonic-gate err = EINVAL; 63327c478bd9Sstevel@tonic-gate goto out; 63337c478bd9Sstevel@tonic-gate } 63347c478bd9Sstevel@tonic-gate 63357c478bd9Sstevel@tonic-gate /* 63367c478bd9Sstevel@tonic-gate * Following convention, if this is a directory then we acquire the 63377c478bd9Sstevel@tonic-gate * inode's i_rwlock after starting a UFS logging transaction; 63387c478bd9Sstevel@tonic-gate * otherwise, we acquire it beforehand. Since we were called (and 63397c478bd9Sstevel@tonic-gate * must therefore return) with the lock held, we will have to drop it, 63407c478bd9Sstevel@tonic-gate * and later reacquire it, if operating on a directory. 63417c478bd9Sstevel@tonic-gate */ 63427c478bd9Sstevel@tonic-gate if (vp->v_type == VDIR) { 63437c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 63447c478bd9Sstevel@tonic-gate haverwlock = 0; 63457c478bd9Sstevel@tonic-gate } else { 63467c478bd9Sstevel@tonic-gate /* Upgrade the lock if required. */ 63477c478bd9Sstevel@tonic-gate if (!rw_write_held(&ip->i_rwlock)) { 63487c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 63497c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_WRITER); 63507c478bd9Sstevel@tonic-gate } 63517c478bd9Sstevel@tonic-gate } 63527c478bd9Sstevel@tonic-gate 63537c478bd9Sstevel@tonic-gate again: 63547c478bd9Sstevel@tonic-gate ASSERT(!(vp->v_type == VDIR && haverwlock)); 63557c478bd9Sstevel@tonic-gate if (err = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_SETATTR_MASK)) { 63567c478bd9Sstevel@tonic-gate ulp = NULL; 63577c478bd9Sstevel@tonic-gate retry = 0; 63587c478bd9Sstevel@tonic-gate goto out; 63597c478bd9Sstevel@tonic-gate } 63607c478bd9Sstevel@tonic-gate 63617c478bd9Sstevel@tonic-gate /* 63627c478bd9Sstevel@tonic-gate * Check that the file system supports this operation. Note that 63637c478bd9Sstevel@tonic-gate * ufs_lockfs_begin() will have checked that the file system had 63647c478bd9Sstevel@tonic-gate * not been forcibly unmounted. 63657c478bd9Sstevel@tonic-gate */ 63667c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_fs->fs_ronly) { 63677c478bd9Sstevel@tonic-gate err = EROFS; 63687c478bd9Sstevel@tonic-gate goto out; 63697c478bd9Sstevel@tonic-gate } 63707c478bd9Sstevel@tonic-gate if (ufsvfsp->vfs_nosetsec) { 63717c478bd9Sstevel@tonic-gate err = ENOSYS; 63727c478bd9Sstevel@tonic-gate goto out; 63737c478bd9Sstevel@tonic-gate } 63747c478bd9Sstevel@tonic-gate 63757c478bd9Sstevel@tonic-gate if (ulp) { 63767c478bd9Sstevel@tonic-gate TRANS_BEGIN_ASYNC(ufsvfsp, TOP_SETSECATTR, 637780d34432Sfrankho trans_size = TOP_SETSECATTR_SIZE(VTOI(vp))); 63787c478bd9Sstevel@tonic-gate donetrans = 1; 63797c478bd9Sstevel@tonic-gate } 63807c478bd9Sstevel@tonic-gate 63817c478bd9Sstevel@tonic-gate if (vp->v_type == VDIR) { 63827c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_WRITER); 63837c478bd9Sstevel@tonic-gate haverwlock = 1; 63847c478bd9Sstevel@tonic-gate } 63857c478bd9Sstevel@tonic-gate 63867c478bd9Sstevel@tonic-gate ASSERT(haverwlock); 63877c478bd9Sstevel@tonic-gate 63887c478bd9Sstevel@tonic-gate /* Do the actual work. */ 63897c478bd9Sstevel@tonic-gate rw_enter(&ip->i_contents, RW_WRITER); 63907c478bd9Sstevel@tonic-gate /* 63917c478bd9Sstevel@tonic-gate * Suppress out of inodes messages if we will retry. 63927c478bd9Sstevel@tonic-gate */ 63937c478bd9Sstevel@tonic-gate if (retry) 63947c478bd9Sstevel@tonic-gate ip->i_flag |= IQUIET; 63957c478bd9Sstevel@tonic-gate err = ufs_acl_set(ip, vsap, flag, cr); 63967c478bd9Sstevel@tonic-gate ip->i_flag &= ~IQUIET; 63977c478bd9Sstevel@tonic-gate rw_exit(&ip->i_contents); 63987c478bd9Sstevel@tonic-gate 63997c478bd9Sstevel@tonic-gate out: 64007c478bd9Sstevel@tonic-gate if (ulp) { 64017c478bd9Sstevel@tonic-gate if (donetrans) { 64027c478bd9Sstevel@tonic-gate /* 64037c478bd9Sstevel@tonic-gate * top_end_async() can eventually call 64047c478bd9Sstevel@tonic-gate * top_end_sync(), which can block. We must 64057c478bd9Sstevel@tonic-gate * therefore observe the lock-ordering protocol 64067c478bd9Sstevel@tonic-gate * here as well. 64077c478bd9Sstevel@tonic-gate */ 64087c478bd9Sstevel@tonic-gate if (vp->v_type == VDIR) { 64097c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 64107c478bd9Sstevel@tonic-gate haverwlock = 0; 64117c478bd9Sstevel@tonic-gate } 64127c478bd9Sstevel@tonic-gate TRANS_END_ASYNC(ufsvfsp, TOP_SETSECATTR, trans_size); 64137c478bd9Sstevel@tonic-gate } 64147c478bd9Sstevel@tonic-gate ufs_lockfs_end(ulp); 64157c478bd9Sstevel@tonic-gate } 64167c478bd9Sstevel@tonic-gate /* 64177c478bd9Sstevel@tonic-gate * If no inodes available, try scaring a logically- 64187c478bd9Sstevel@tonic-gate * free one out of the delete queue to someplace 64197c478bd9Sstevel@tonic-gate * that we can find it. 64207c478bd9Sstevel@tonic-gate */ 64217c478bd9Sstevel@tonic-gate if ((err == ENOSPC) && retry && TRANS_ISTRANS(ufsvfsp)) { 64227c478bd9Sstevel@tonic-gate ufs_delete_drain_wait(ufsvfsp, 1); 64237c478bd9Sstevel@tonic-gate retry = 0; 64247c478bd9Sstevel@tonic-gate if (vp->v_type == VDIR && haverwlock) { 64257c478bd9Sstevel@tonic-gate rw_exit(&ip->i_rwlock); 64267c478bd9Sstevel@tonic-gate haverwlock = 0; 64277c478bd9Sstevel@tonic-gate } 64287c478bd9Sstevel@tonic-gate goto again; 64297c478bd9Sstevel@tonic-gate } 64307c478bd9Sstevel@tonic-gate /* 64317c478bd9Sstevel@tonic-gate * If we need to reacquire the lock then it is safe to do so 64327c478bd9Sstevel@tonic-gate * as a reader. This is because ufs_rwunlock(), which will be 64337c478bd9Sstevel@tonic-gate * called by our caller after we return, does not differentiate 64347c478bd9Sstevel@tonic-gate * between shared and exclusive locks. 64357c478bd9Sstevel@tonic-gate */ 64367c478bd9Sstevel@tonic-gate if (!haverwlock) { 64377c478bd9Sstevel@tonic-gate ASSERT(vp->v_type == VDIR); 64387c478bd9Sstevel@tonic-gate rw_enter(&ip->i_rwlock, RW_READER); 64397c478bd9Sstevel@tonic-gate } 64407c478bd9Sstevel@tonic-gate 64417c478bd9Sstevel@tonic-gate return (err); 64427c478bd9Sstevel@tonic-gate } 64439b5097eeSOwen Roberts 64449b5097eeSOwen Roberts /* 64459b5097eeSOwen Roberts * Locate the vnode to be used for an event notification. As this will 64469b5097eeSOwen Roberts * be called prior to the name space change perform basic verification 64479b5097eeSOwen Roberts * that the change will be allowed. 64489b5097eeSOwen Roberts */ 64499b5097eeSOwen Roberts 64509b5097eeSOwen Roberts static int 64519b5097eeSOwen Roberts ufs_eventlookup(struct vnode *dvp, char *nm, struct cred *cr, 64529b5097eeSOwen Roberts struct vnode **vpp) 64539b5097eeSOwen Roberts { 64549b5097eeSOwen Roberts int namlen; 64559b5097eeSOwen Roberts int error; 64569b5097eeSOwen Roberts struct vnode *vp; 64579b5097eeSOwen Roberts struct inode *ip; 64589b5097eeSOwen Roberts struct inode *xip; 64599b5097eeSOwen Roberts struct ufsvfs *ufsvfsp; 64609b5097eeSOwen Roberts struct ulockfs *ulp; 64619b5097eeSOwen Roberts 64629b5097eeSOwen Roberts ip = VTOI(dvp); 64639b5097eeSOwen Roberts *vpp = NULL; 64649b5097eeSOwen Roberts 64659b5097eeSOwen Roberts if ((namlen = strlen(nm)) == 0) 64669b5097eeSOwen Roberts return (EINVAL); 64679b5097eeSOwen Roberts 64689b5097eeSOwen Roberts if (nm[0] == '.') { 64699b5097eeSOwen Roberts if (namlen == 1) 64709b5097eeSOwen Roberts return (EINVAL); 64719b5097eeSOwen Roberts else if ((namlen == 2) && nm[1] == '.') { 64729b5097eeSOwen Roberts return (EEXIST); 64739b5097eeSOwen Roberts } 64749b5097eeSOwen Roberts } 64759b5097eeSOwen Roberts 64769b5097eeSOwen Roberts /* 64779b5097eeSOwen Roberts * Check accessibility and write access of parent directory as we 64789b5097eeSOwen Roberts * only want to post the event if we're able to make a change. 64799b5097eeSOwen Roberts */ 64809b5097eeSOwen Roberts if (error = ufs_diraccess(ip, IEXEC|IWRITE, cr)) 64819b5097eeSOwen Roberts return (error); 64829b5097eeSOwen Roberts 64839b5097eeSOwen Roberts if (vp = dnlc_lookup(dvp, nm)) { 64849b5097eeSOwen Roberts if (vp == DNLC_NO_VNODE) { 64859b5097eeSOwen Roberts VN_RELE(vp); 64869b5097eeSOwen Roberts return (ENOENT); 64879b5097eeSOwen Roberts } 64889b5097eeSOwen Roberts 64899b5097eeSOwen Roberts *vpp = vp; 64909b5097eeSOwen Roberts return (0); 64919b5097eeSOwen Roberts } 64929b5097eeSOwen Roberts 64939b5097eeSOwen Roberts /* 64949b5097eeSOwen Roberts * Keep the idle queue from getting too long by idling two 64959b5097eeSOwen Roberts * inodes before attempting to allocate another. 64969b5097eeSOwen Roberts * This operation must be performed before entering lockfs 64979b5097eeSOwen Roberts * or a transaction. 64989b5097eeSOwen Roberts */ 64999b5097eeSOwen Roberts if (ufs_idle_q.uq_ne > ufs_idle_q.uq_hiwat) 65009b5097eeSOwen Roberts if ((curthread->t_flag & T_DONTBLOCK) == 0) { 65019b5097eeSOwen Roberts ins.in_lidles.value.ul += ufs_lookup_idle_count; 65029b5097eeSOwen Roberts ufs_idle_some(ufs_lookup_idle_count); 65039b5097eeSOwen Roberts } 65049b5097eeSOwen Roberts 65059b5097eeSOwen Roberts ufsvfsp = ip->i_ufsvfs; 65069b5097eeSOwen Roberts 65079b5097eeSOwen Roberts retry_lookup: 65089b5097eeSOwen Roberts if (error = ufs_lockfs_begin(ufsvfsp, &ulp, ULOCKFS_LOOKUP_MASK)) 65099b5097eeSOwen Roberts return (error); 65109b5097eeSOwen Roberts 65119b5097eeSOwen Roberts if ((error = ufs_dirlook(ip, nm, &xip, cr, 1, 1)) == 0) { 65129b5097eeSOwen Roberts vp = ITOV(xip); 65139b5097eeSOwen Roberts *vpp = vp; 65149b5097eeSOwen Roberts } 65159b5097eeSOwen Roberts 65169b5097eeSOwen Roberts if (ulp) { 65179b5097eeSOwen Roberts ufs_lockfs_end(ulp); 65189b5097eeSOwen Roberts } 65199b5097eeSOwen Roberts 65209b5097eeSOwen Roberts if (error == EAGAIN) 65219b5097eeSOwen Roberts goto retry_lookup; 65229b5097eeSOwen Roberts 65239b5097eeSOwen Roberts return (error); 65249b5097eeSOwen Roberts } 6525