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 55a59a8b3Srsb * Common Development and Distribution License (the "License"). 65a59a8b3Srsb * 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 */ 21*5f10ef69SYuri Pankov 227c478bd9Sstevel@tonic-gate /* 230fbb751dSJohn Levon * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved. 2476ca3cb0SRobert Mustacchi * Copyright (c) 2014, Joyent, Inc. All rights reserved. 25406fc510SToomas Soome * Copyright 2016 Toomas Soome <tsoome@me.com> 263f11de9dSSara Hartse * Copyright (c) 2016 by Delphix. All rights reserved. 27*5f10ef69SYuri Pankov * Copyright 2016 Nexenta Systems, Inc. 287c478bd9Sstevel@tonic-gate */ 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 317c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate /* 347c478bd9Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988 357c478bd9Sstevel@tonic-gate * The Regents of the University of California 367c478bd9Sstevel@tonic-gate * All Rights Reserved 377c478bd9Sstevel@tonic-gate * 387c478bd9Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from 397c478bd9Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its 407c478bd9Sstevel@tonic-gate * contributors. 417c478bd9Sstevel@tonic-gate */ 427c478bd9Sstevel@tonic-gate 437c478bd9Sstevel@tonic-gate #include <sys/types.h> 447c478bd9Sstevel@tonic-gate #include <sys/t_lock.h> 457c478bd9Sstevel@tonic-gate #include <sys/param.h> 467c478bd9Sstevel@tonic-gate #include <sys/errno.h> 477c478bd9Sstevel@tonic-gate #include <sys/user.h> 487c478bd9Sstevel@tonic-gate #include <sys/fstyp.h> 497c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 507c478bd9Sstevel@tonic-gate #include <sys/systm.h> 517c478bd9Sstevel@tonic-gate #include <sys/proc.h> 527c478bd9Sstevel@tonic-gate #include <sys/mount.h> 537c478bd9Sstevel@tonic-gate #include <sys/vfs.h> 54aa59c4cbSrsb #include <sys/vfs_opreg.h> 557c478bd9Sstevel@tonic-gate #include <sys/fem.h> 567c478bd9Sstevel@tonic-gate #include <sys/mntent.h> 577c478bd9Sstevel@tonic-gate #include <sys/stat.h> 587c478bd9Sstevel@tonic-gate #include <sys/statvfs.h> 597c478bd9Sstevel@tonic-gate #include <sys/statfs.h> 607c478bd9Sstevel@tonic-gate #include <sys/cred.h> 617c478bd9Sstevel@tonic-gate #include <sys/vnode.h> 627c478bd9Sstevel@tonic-gate #include <sys/rwstlock.h> 637c478bd9Sstevel@tonic-gate #include <sys/dnlc.h> 647c478bd9Sstevel@tonic-gate #include <sys/file.h> 657c478bd9Sstevel@tonic-gate #include <sys/time.h> 667c478bd9Sstevel@tonic-gate #include <sys/atomic.h> 677c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h> 687c478bd9Sstevel@tonic-gate #include <sys/buf.h> 697c478bd9Sstevel@tonic-gate #include <sys/swap.h> 707c478bd9Sstevel@tonic-gate #include <sys/debug.h> 717c478bd9Sstevel@tonic-gate #include <sys/vnode.h> 727c478bd9Sstevel@tonic-gate #include <sys/modctl.h> 737c478bd9Sstevel@tonic-gate #include <sys/ddi.h> 747c478bd9Sstevel@tonic-gate #include <sys/pathname.h> 757c478bd9Sstevel@tonic-gate #include <sys/bootconf.h> 767c478bd9Sstevel@tonic-gate #include <sys/dumphdr.h> 777c478bd9Sstevel@tonic-gate #include <sys/dc_ki.h> 787c478bd9Sstevel@tonic-gate #include <sys/poll.h> 797c478bd9Sstevel@tonic-gate #include <sys/sunddi.h> 807c478bd9Sstevel@tonic-gate #include <sys/sysmacros.h> 817c478bd9Sstevel@tonic-gate #include <sys/zone.h> 827c478bd9Sstevel@tonic-gate #include <sys/policy.h> 837c478bd9Sstevel@tonic-gate #include <sys/ctfs.h> 847c478bd9Sstevel@tonic-gate #include <sys/objfs.h> 857c478bd9Sstevel@tonic-gate #include <sys/console.h> 867c478bd9Sstevel@tonic-gate #include <sys/reboot.h> 87da6c28aaSamw #include <sys/attr.h> 88b24ab676SJeff Bonwick #include <sys/zio.h> 89e7cbe64fSgw #include <sys/spa.h> 9093239addSjohnlev #include <sys/lofi.h> 916cefaae1SJack Meng #include <sys/bootprops.h> 927c478bd9Sstevel@tonic-gate 937c478bd9Sstevel@tonic-gate #include <vm/page.h> 947c478bd9Sstevel@tonic-gate 957c478bd9Sstevel@tonic-gate #include <fs/fs_subr.h> 9682c7f3c4Srsb /* Private interfaces to create vopstats-related data structures */ 9782c7f3c4Srsb extern void initialize_vopstats(vopstats_t *); 9882c7f3c4Srsb extern vopstats_t *get_fstype_vopstats(struct vfs *, struct vfssw *); 9982c7f3c4Srsb extern vsk_anchor_t *get_vskstat_anchor(struct vfs *); 10082c7f3c4Srsb 1017c478bd9Sstevel@tonic-gate static void vfs_clearmntopt_nolock(mntopts_t *, const char *, int); 1027c478bd9Sstevel@tonic-gate static void vfs_setmntopt_nolock(mntopts_t *, const char *, 1037c478bd9Sstevel@tonic-gate const char *, int, int); 1047c478bd9Sstevel@tonic-gate static int vfs_optionisset_nolock(const mntopts_t *, const char *, char **); 1057c478bd9Sstevel@tonic-gate static void vfs_freemnttab(struct vfs *); 1067c478bd9Sstevel@tonic-gate static void vfs_freeopt(mntopt_t *); 1077c478bd9Sstevel@tonic-gate static void vfs_swapopttbl_nolock(mntopts_t *, mntopts_t *); 1087c478bd9Sstevel@tonic-gate static void vfs_swapopttbl(mntopts_t *, mntopts_t *); 1097c478bd9Sstevel@tonic-gate static void vfs_copyopttbl_extend(const mntopts_t *, mntopts_t *, int); 1107c478bd9Sstevel@tonic-gate static void vfs_createopttbl_extend(mntopts_t *, const char *, 1117c478bd9Sstevel@tonic-gate const mntopts_t *); 1127c478bd9Sstevel@tonic-gate static char **vfs_copycancelopt_extend(char **const, int); 1137c478bd9Sstevel@tonic-gate static void vfs_freecancelopt(char **); 114843e1988Sjohnlev static void getrootfs(char **, char **); 1157c478bd9Sstevel@tonic-gate static int getmacpath(dev_info_t *, void *); 116df2381bfSpraks static void vfs_mnttabvp_setup(void); 1177c478bd9Sstevel@tonic-gate 1187c478bd9Sstevel@tonic-gate struct ipmnt { 1197c478bd9Sstevel@tonic-gate struct ipmnt *mip_next; 1207c478bd9Sstevel@tonic-gate dev_t mip_dev; 1217c478bd9Sstevel@tonic-gate struct vfs *mip_vfsp; 1227c478bd9Sstevel@tonic-gate }; 1237c478bd9Sstevel@tonic-gate 1247c478bd9Sstevel@tonic-gate static kmutex_t vfs_miplist_mutex; 1257c478bd9Sstevel@tonic-gate static struct ipmnt *vfs_miplist = NULL; 1267c478bd9Sstevel@tonic-gate static struct ipmnt *vfs_miplist_end = NULL; 1277c478bd9Sstevel@tonic-gate 128da6c28aaSamw static kmem_cache_t *vfs_cache; /* Pointer to VFS kmem cache */ 129da6c28aaSamw 1307c478bd9Sstevel@tonic-gate /* 1317c478bd9Sstevel@tonic-gate * VFS global data. 1327c478bd9Sstevel@tonic-gate */ 1337c478bd9Sstevel@tonic-gate vnode_t *rootdir; /* pointer to root inode vnode. */ 1347c478bd9Sstevel@tonic-gate vnode_t *devicesdir; /* pointer to inode of devices root */ 135facf4a8dSllai vnode_t *devdir; /* pointer to inode of dev root */ 1367c478bd9Sstevel@tonic-gate 1377c478bd9Sstevel@tonic-gate char *server_rootpath; /* root path for diskless clients */ 1387c478bd9Sstevel@tonic-gate char *server_hostname; /* hostname of diskless server */ 1397c478bd9Sstevel@tonic-gate 1407c478bd9Sstevel@tonic-gate static struct vfs root; 1417c478bd9Sstevel@tonic-gate static struct vfs devices; 142facf4a8dSllai static struct vfs dev; 1437c478bd9Sstevel@tonic-gate struct vfs *rootvfs = &root; /* pointer to root vfs; head of VFS list. */ 1447c478bd9Sstevel@tonic-gate rvfs_t *rvfs_list; /* array of vfs ptrs for vfs hash list */ 1457c478bd9Sstevel@tonic-gate int vfshsz = 512; /* # of heads/locks in vfs hash arrays */ 1467c478bd9Sstevel@tonic-gate /* must be power of 2! */ 1477c478bd9Sstevel@tonic-gate timespec_t vfs_mnttab_ctime; /* mnttab created time */ 1487c478bd9Sstevel@tonic-gate timespec_t vfs_mnttab_mtime; /* mnttab last modified time */ 149ffc349abSdm char *vfs_dummyfstype = "\0"; 1507c478bd9Sstevel@tonic-gate struct pollhead vfs_pollhd; /* for mnttab pollers */ 151df2381bfSpraks struct vnode *vfs_mntdummyvp; /* to fake mnttab read/write for file events */ 152df2381bfSpraks int mntfstype; /* will be set once mnt fs is mounted */ 1537c478bd9Sstevel@tonic-gate 1547c478bd9Sstevel@tonic-gate /* 1557c478bd9Sstevel@tonic-gate * Table for generic options recognized in the VFS layer and acted 1567c478bd9Sstevel@tonic-gate * on at this level before parsing file system specific options. 1577c478bd9Sstevel@tonic-gate * The nosuid option is stronger than any of the devices and setuid 1587c478bd9Sstevel@tonic-gate * options, so those are canceled when nosuid is seen. 1597c478bd9Sstevel@tonic-gate * 1607c478bd9Sstevel@tonic-gate * All options which are added here need to be added to the 1617c478bd9Sstevel@tonic-gate * list of standard options in usr/src/cmd/fs.d/fslib.c as well. 1627c478bd9Sstevel@tonic-gate */ 1637c478bd9Sstevel@tonic-gate /* 1647c478bd9Sstevel@tonic-gate * VFS Mount options table 1657c478bd9Sstevel@tonic-gate */ 1667c478bd9Sstevel@tonic-gate static char *ro_cancel[] = { MNTOPT_RW, NULL }; 1677c478bd9Sstevel@tonic-gate static char *rw_cancel[] = { MNTOPT_RO, NULL }; 1687c478bd9Sstevel@tonic-gate static char *suid_cancel[] = { MNTOPT_NOSUID, NULL }; 1697c478bd9Sstevel@tonic-gate static char *nosuid_cancel[] = { MNTOPT_SUID, MNTOPT_DEVICES, MNTOPT_NODEVICES, 1707c478bd9Sstevel@tonic-gate MNTOPT_NOSETUID, MNTOPT_SETUID, NULL }; 1717c478bd9Sstevel@tonic-gate static char *devices_cancel[] = { MNTOPT_NODEVICES, NULL }; 1727c478bd9Sstevel@tonic-gate static char *nodevices_cancel[] = { MNTOPT_DEVICES, NULL }; 1737c478bd9Sstevel@tonic-gate static char *setuid_cancel[] = { MNTOPT_NOSETUID, NULL }; 1747c478bd9Sstevel@tonic-gate static char *nosetuid_cancel[] = { MNTOPT_SETUID, NULL }; 1757c478bd9Sstevel@tonic-gate static char *nbmand_cancel[] = { MNTOPT_NONBMAND, NULL }; 1767c478bd9Sstevel@tonic-gate static char *nonbmand_cancel[] = { MNTOPT_NBMAND, NULL }; 1777c478bd9Sstevel@tonic-gate static char *exec_cancel[] = { MNTOPT_NOEXEC, NULL }; 1787c478bd9Sstevel@tonic-gate static char *noexec_cancel[] = { MNTOPT_EXEC, NULL }; 1797c478bd9Sstevel@tonic-gate 1807c478bd9Sstevel@tonic-gate static const mntopt_t mntopts[] = { 1817c478bd9Sstevel@tonic-gate /* 1827c478bd9Sstevel@tonic-gate * option name cancel options default arg flags 1837c478bd9Sstevel@tonic-gate */ 1847c478bd9Sstevel@tonic-gate { MNTOPT_REMOUNT, NULL, NULL, 1857c478bd9Sstevel@tonic-gate MO_NODISPLAY, (void *)0 }, 1867c478bd9Sstevel@tonic-gate { MNTOPT_RO, ro_cancel, NULL, 0, 1877c478bd9Sstevel@tonic-gate (void *)0 }, 1887c478bd9Sstevel@tonic-gate { MNTOPT_RW, rw_cancel, NULL, 0, 1897c478bd9Sstevel@tonic-gate (void *)0 }, 1907c478bd9Sstevel@tonic-gate { MNTOPT_SUID, suid_cancel, NULL, 0, 1917c478bd9Sstevel@tonic-gate (void *)0 }, 1927c478bd9Sstevel@tonic-gate { MNTOPT_NOSUID, nosuid_cancel, NULL, 0, 1937c478bd9Sstevel@tonic-gate (void *)0 }, 1947c478bd9Sstevel@tonic-gate { MNTOPT_DEVICES, devices_cancel, NULL, 0, 1957c478bd9Sstevel@tonic-gate (void *)0 }, 1967c478bd9Sstevel@tonic-gate { MNTOPT_NODEVICES, nodevices_cancel, NULL, 0, 1977c478bd9Sstevel@tonic-gate (void *)0 }, 1987c478bd9Sstevel@tonic-gate { MNTOPT_SETUID, setuid_cancel, NULL, 0, 1997c478bd9Sstevel@tonic-gate (void *)0 }, 2007c478bd9Sstevel@tonic-gate { MNTOPT_NOSETUID, nosetuid_cancel, NULL, 0, 2017c478bd9Sstevel@tonic-gate (void *)0 }, 2027c478bd9Sstevel@tonic-gate { MNTOPT_NBMAND, nbmand_cancel, NULL, 0, 2037c478bd9Sstevel@tonic-gate (void *)0 }, 2047c478bd9Sstevel@tonic-gate { MNTOPT_NONBMAND, nonbmand_cancel, NULL, 0, 2057c478bd9Sstevel@tonic-gate (void *)0 }, 2067c478bd9Sstevel@tonic-gate { MNTOPT_EXEC, exec_cancel, NULL, 0, 2077c478bd9Sstevel@tonic-gate (void *)0 }, 2087c478bd9Sstevel@tonic-gate { MNTOPT_NOEXEC, noexec_cancel, NULL, 0, 2097c478bd9Sstevel@tonic-gate (void *)0 }, 2107c478bd9Sstevel@tonic-gate }; 2117c478bd9Sstevel@tonic-gate 2127c478bd9Sstevel@tonic-gate const mntopts_t vfs_mntopts = { 2137c478bd9Sstevel@tonic-gate sizeof (mntopts) / sizeof (mntopt_t), 2147c478bd9Sstevel@tonic-gate (mntopt_t *)&mntopts[0] 2157c478bd9Sstevel@tonic-gate }; 2167c478bd9Sstevel@tonic-gate 2177c478bd9Sstevel@tonic-gate /* 2187c478bd9Sstevel@tonic-gate * File system operation dispatch functions. 2197c478bd9Sstevel@tonic-gate */ 2207c478bd9Sstevel@tonic-gate 2217c478bd9Sstevel@tonic-gate int 2227c478bd9Sstevel@tonic-gate fsop_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr) 2237c478bd9Sstevel@tonic-gate { 2247c478bd9Sstevel@tonic-gate return (*(vfsp)->vfs_op->vfs_mount)(vfsp, mvp, uap, cr); 2257c478bd9Sstevel@tonic-gate } 2267c478bd9Sstevel@tonic-gate 2277c478bd9Sstevel@tonic-gate int 2287c478bd9Sstevel@tonic-gate fsop_unmount(vfs_t *vfsp, int flag, cred_t *cr) 2297c478bd9Sstevel@tonic-gate { 2307c478bd9Sstevel@tonic-gate return (*(vfsp)->vfs_op->vfs_unmount)(vfsp, flag, cr); 2317c478bd9Sstevel@tonic-gate } 2327c478bd9Sstevel@tonic-gate 2337c478bd9Sstevel@tonic-gate int 2347c478bd9Sstevel@tonic-gate fsop_root(vfs_t *vfsp, vnode_t **vpp) 2357c478bd9Sstevel@tonic-gate { 2367c478bd9Sstevel@tonic-gate refstr_t *mntpt; 2377c478bd9Sstevel@tonic-gate int ret = (*(vfsp)->vfs_op->vfs_root)(vfsp, vpp); 2387c478bd9Sstevel@tonic-gate /* 2397c478bd9Sstevel@tonic-gate * Make sure this root has a path. With lofs, it is possible to have 2407c478bd9Sstevel@tonic-gate * a NULL mountpoint. 2417c478bd9Sstevel@tonic-gate */ 242ca2c3138Seschrock if (ret == 0 && vfsp->vfs_mntpt != NULL && (*vpp)->v_path == NULL) { 2437c478bd9Sstevel@tonic-gate mntpt = vfs_getmntpoint(vfsp); 2447c478bd9Sstevel@tonic-gate vn_setpath_str(*vpp, refstr_value(mntpt), 2457c478bd9Sstevel@tonic-gate strlen(refstr_value(mntpt))); 2467c478bd9Sstevel@tonic-gate refstr_rele(mntpt); 2477c478bd9Sstevel@tonic-gate } 2487c478bd9Sstevel@tonic-gate 2497c478bd9Sstevel@tonic-gate return (ret); 2507c478bd9Sstevel@tonic-gate } 2517c478bd9Sstevel@tonic-gate 2527c478bd9Sstevel@tonic-gate int 2537c478bd9Sstevel@tonic-gate fsop_statfs(vfs_t *vfsp, statvfs64_t *sp) 2547c478bd9Sstevel@tonic-gate { 2557c478bd9Sstevel@tonic-gate return (*(vfsp)->vfs_op->vfs_statvfs)(vfsp, sp); 2567c478bd9Sstevel@tonic-gate } 2577c478bd9Sstevel@tonic-gate 2587c478bd9Sstevel@tonic-gate int 2597c478bd9Sstevel@tonic-gate fsop_sync(vfs_t *vfsp, short flag, cred_t *cr) 2607c478bd9Sstevel@tonic-gate { 2617c478bd9Sstevel@tonic-gate return (*(vfsp)->vfs_op->vfs_sync)(vfsp, flag, cr); 2627c478bd9Sstevel@tonic-gate } 2637c478bd9Sstevel@tonic-gate 2647c478bd9Sstevel@tonic-gate int 2657c478bd9Sstevel@tonic-gate fsop_vget(vfs_t *vfsp, vnode_t **vpp, fid_t *fidp) 2667c478bd9Sstevel@tonic-gate { 267da6c28aaSamw /* 268da6c28aaSamw * In order to handle system attribute fids in a manner 269da6c28aaSamw * transparent to the underlying fs, we embed the fid for 270da6c28aaSamw * the sysattr parent object in the sysattr fid and tack on 271da6c28aaSamw * some extra bytes that only the sysattr layer knows about. 272da6c28aaSamw * 273da6c28aaSamw * This guarantees that sysattr fids are larger than other fids 2749660e5cbSJanice Chang * for this vfs. If the vfs supports the sysattr view interface 2759660e5cbSJanice Chang * (as indicated by VFSFT_SYSATTR_VIEWS), we cannot have a size 2769660e5cbSJanice Chang * collision with XATTR_FIDSZ. 277da6c28aaSamw */ 2789660e5cbSJanice Chang if (vfs_has_feature(vfsp, VFSFT_SYSATTR_VIEWS) && 279da6c28aaSamw fidp->fid_len == XATTR_FIDSZ) 280da6c28aaSamw return (xattr_dir_vget(vfsp, vpp, fidp)); 281da6c28aaSamw 2827c478bd9Sstevel@tonic-gate return (*(vfsp)->vfs_op->vfs_vget)(vfsp, vpp, fidp); 2837c478bd9Sstevel@tonic-gate } 2847c478bd9Sstevel@tonic-gate 2857c478bd9Sstevel@tonic-gate int 2867c478bd9Sstevel@tonic-gate fsop_mountroot(vfs_t *vfsp, enum whymountroot reason) 2877c478bd9Sstevel@tonic-gate { 2887c478bd9Sstevel@tonic-gate return (*(vfsp)->vfs_op->vfs_mountroot)(vfsp, reason); 2897c478bd9Sstevel@tonic-gate } 2907c478bd9Sstevel@tonic-gate 2917c478bd9Sstevel@tonic-gate void 2927c478bd9Sstevel@tonic-gate fsop_freefs(vfs_t *vfsp) 2937c478bd9Sstevel@tonic-gate { 2947c478bd9Sstevel@tonic-gate (*(vfsp)->vfs_op->vfs_freevfs)(vfsp); 2957c478bd9Sstevel@tonic-gate } 2967c478bd9Sstevel@tonic-gate 2977c478bd9Sstevel@tonic-gate int 2987c478bd9Sstevel@tonic-gate fsop_vnstate(vfs_t *vfsp, vnode_t *vp, vntrans_t nstate) 2997c478bd9Sstevel@tonic-gate { 3007c478bd9Sstevel@tonic-gate return ((*(vfsp)->vfs_op->vfs_vnstate)(vfsp, vp, nstate)); 3017c478bd9Sstevel@tonic-gate } 3027c478bd9Sstevel@tonic-gate 3037c478bd9Sstevel@tonic-gate int 3047c478bd9Sstevel@tonic-gate fsop_sync_by_kind(int fstype, short flag, cred_t *cr) 3057c478bd9Sstevel@tonic-gate { 3067c478bd9Sstevel@tonic-gate ASSERT((fstype >= 0) && (fstype < nfstype)); 3077c478bd9Sstevel@tonic-gate 3087c478bd9Sstevel@tonic-gate if (ALLOCATED_VFSSW(&vfssw[fstype]) && VFS_INSTALLED(&vfssw[fstype])) 3097c478bd9Sstevel@tonic-gate return (*vfssw[fstype].vsw_vfsops.vfs_sync) (NULL, flag, cr); 3107c478bd9Sstevel@tonic-gate else 3117c478bd9Sstevel@tonic-gate return (ENOTSUP); 3127c478bd9Sstevel@tonic-gate } 3137c478bd9Sstevel@tonic-gate 3147c478bd9Sstevel@tonic-gate /* 3157c478bd9Sstevel@tonic-gate * File system initialization. vfs_setfsops() must be called from a file 3167c478bd9Sstevel@tonic-gate * system's init routine. 3177c478bd9Sstevel@tonic-gate */ 3187c478bd9Sstevel@tonic-gate 3197c478bd9Sstevel@tonic-gate static int 3207c478bd9Sstevel@tonic-gate fs_copyfsops(const fs_operation_def_t *template, vfsops_t *actual, 3217c478bd9Sstevel@tonic-gate int *unused_ops) 3227c478bd9Sstevel@tonic-gate { 3237c478bd9Sstevel@tonic-gate static const fs_operation_trans_def_t vfs_ops_table[] = { 3247c478bd9Sstevel@tonic-gate VFSNAME_MOUNT, offsetof(vfsops_t, vfs_mount), 3257c478bd9Sstevel@tonic-gate fs_nosys, fs_nosys, 3267c478bd9Sstevel@tonic-gate 3277c478bd9Sstevel@tonic-gate VFSNAME_UNMOUNT, offsetof(vfsops_t, vfs_unmount), 3287c478bd9Sstevel@tonic-gate fs_nosys, fs_nosys, 3297c478bd9Sstevel@tonic-gate 3307c478bd9Sstevel@tonic-gate VFSNAME_ROOT, offsetof(vfsops_t, vfs_root), 3317c478bd9Sstevel@tonic-gate fs_nosys, fs_nosys, 3327c478bd9Sstevel@tonic-gate 3337c478bd9Sstevel@tonic-gate VFSNAME_STATVFS, offsetof(vfsops_t, vfs_statvfs), 3347c478bd9Sstevel@tonic-gate fs_nosys, fs_nosys, 3357c478bd9Sstevel@tonic-gate 3367c478bd9Sstevel@tonic-gate VFSNAME_SYNC, offsetof(vfsops_t, vfs_sync), 3377c478bd9Sstevel@tonic-gate (fs_generic_func_p) fs_sync, 3387c478bd9Sstevel@tonic-gate (fs_generic_func_p) fs_sync, /* No errors allowed */ 3397c478bd9Sstevel@tonic-gate 3407c478bd9Sstevel@tonic-gate VFSNAME_VGET, offsetof(vfsops_t, vfs_vget), 3417c478bd9Sstevel@tonic-gate fs_nosys, fs_nosys, 3427c478bd9Sstevel@tonic-gate 3437c478bd9Sstevel@tonic-gate VFSNAME_MOUNTROOT, offsetof(vfsops_t, vfs_mountroot), 3447c478bd9Sstevel@tonic-gate fs_nosys, fs_nosys, 3457c478bd9Sstevel@tonic-gate 3467c478bd9Sstevel@tonic-gate VFSNAME_FREEVFS, offsetof(vfsops_t, vfs_freevfs), 3477c478bd9Sstevel@tonic-gate (fs_generic_func_p)fs_freevfs, 3487c478bd9Sstevel@tonic-gate (fs_generic_func_p)fs_freevfs, /* Shouldn't fail */ 3497c478bd9Sstevel@tonic-gate 3507c478bd9Sstevel@tonic-gate VFSNAME_VNSTATE, offsetof(vfsops_t, vfs_vnstate), 3517c478bd9Sstevel@tonic-gate (fs_generic_func_p)fs_nosys, 3527c478bd9Sstevel@tonic-gate (fs_generic_func_p)fs_nosys, 3537c478bd9Sstevel@tonic-gate 3547c478bd9Sstevel@tonic-gate NULL, 0, NULL, NULL 3557c478bd9Sstevel@tonic-gate }; 3567c478bd9Sstevel@tonic-gate 3577c478bd9Sstevel@tonic-gate return (fs_build_vector(actual, unused_ops, vfs_ops_table, template)); 3587c478bd9Sstevel@tonic-gate } 3597c478bd9Sstevel@tonic-gate 360e7cbe64fSgw void 361406fc510SToomas Soome zfs_boot_init(void) 362406fc510SToomas Soome { 363e7cbe64fSgw if (strcmp(rootfs.bo_fstype, MNTTYPE_ZFS) == 0) 364e7cbe64fSgw spa_boot_init(); 365e7cbe64fSgw } 366e7cbe64fSgw 3677c478bd9Sstevel@tonic-gate int 3687c478bd9Sstevel@tonic-gate vfs_setfsops(int fstype, const fs_operation_def_t *template, vfsops_t **actual) 3697c478bd9Sstevel@tonic-gate { 3707c478bd9Sstevel@tonic-gate int error; 3717c478bd9Sstevel@tonic-gate int unused_ops; 3727c478bd9Sstevel@tonic-gate 373d320ee2dSrsb /* 374d320ee2dSrsb * Verify that fstype refers to a valid fs. Note that 375d320ee2dSrsb * 0 is valid since it's used to set "stray" ops. 376d320ee2dSrsb */ 377d320ee2dSrsb if ((fstype < 0) || (fstype >= nfstype)) 3787c478bd9Sstevel@tonic-gate return (EINVAL); 3797c478bd9Sstevel@tonic-gate 3807c478bd9Sstevel@tonic-gate if (!ALLOCATED_VFSSW(&vfssw[fstype])) 3817c478bd9Sstevel@tonic-gate return (EINVAL); 3827c478bd9Sstevel@tonic-gate 3837c478bd9Sstevel@tonic-gate /* Set up the operations vector. */ 3847c478bd9Sstevel@tonic-gate 3857c478bd9Sstevel@tonic-gate error = fs_copyfsops(template, &vfssw[fstype].vsw_vfsops, &unused_ops); 3867c478bd9Sstevel@tonic-gate 3877c478bd9Sstevel@tonic-gate if (error != 0) 3887c478bd9Sstevel@tonic-gate return (error); 3897c478bd9Sstevel@tonic-gate 3907c478bd9Sstevel@tonic-gate vfssw[fstype].vsw_flag |= VSW_INSTALLED; 3917c478bd9Sstevel@tonic-gate 3927c478bd9Sstevel@tonic-gate if (actual != NULL) 3937c478bd9Sstevel@tonic-gate *actual = &vfssw[fstype].vsw_vfsops; 3947c478bd9Sstevel@tonic-gate 3957c478bd9Sstevel@tonic-gate #if DEBUG 3967c478bd9Sstevel@tonic-gate if (unused_ops != 0) 3977c478bd9Sstevel@tonic-gate cmn_err(CE_WARN, "vfs_setfsops: %s: %d operations supplied " 3987c478bd9Sstevel@tonic-gate "but not used", vfssw[fstype].vsw_name, unused_ops); 3997c478bd9Sstevel@tonic-gate #endif 4007c478bd9Sstevel@tonic-gate 4017c478bd9Sstevel@tonic-gate return (0); 4027c478bd9Sstevel@tonic-gate } 4037c478bd9Sstevel@tonic-gate 4047c478bd9Sstevel@tonic-gate int 4057c478bd9Sstevel@tonic-gate vfs_makefsops(const fs_operation_def_t *template, vfsops_t **actual) 4067c478bd9Sstevel@tonic-gate { 4077c478bd9Sstevel@tonic-gate int error; 4087c478bd9Sstevel@tonic-gate int unused_ops; 4097c478bd9Sstevel@tonic-gate 4107c478bd9Sstevel@tonic-gate *actual = (vfsops_t *)kmem_alloc(sizeof (vfsops_t), KM_SLEEP); 4117c478bd9Sstevel@tonic-gate 4127c478bd9Sstevel@tonic-gate error = fs_copyfsops(template, *actual, &unused_ops); 4137c478bd9Sstevel@tonic-gate if (error != 0) { 4147c478bd9Sstevel@tonic-gate kmem_free(*actual, sizeof (vfsops_t)); 4157c478bd9Sstevel@tonic-gate *actual = NULL; 4167c478bd9Sstevel@tonic-gate return (error); 4177c478bd9Sstevel@tonic-gate } 4187c478bd9Sstevel@tonic-gate 4197c478bd9Sstevel@tonic-gate return (0); 4207c478bd9Sstevel@tonic-gate } 4217c478bd9Sstevel@tonic-gate 4227c478bd9Sstevel@tonic-gate /* 4237c478bd9Sstevel@tonic-gate * Free a vfsops structure created as a result of vfs_makefsops(). 4247c478bd9Sstevel@tonic-gate * NOTE: For a vfsops structure initialized by vfs_setfsops(), use 4257c478bd9Sstevel@tonic-gate * vfs_freevfsops_by_type(). 4267c478bd9Sstevel@tonic-gate */ 4277c478bd9Sstevel@tonic-gate void 4287c478bd9Sstevel@tonic-gate vfs_freevfsops(vfsops_t *vfsops) 4297c478bd9Sstevel@tonic-gate { 4307c478bd9Sstevel@tonic-gate kmem_free(vfsops, sizeof (vfsops_t)); 4317c478bd9Sstevel@tonic-gate } 4327c478bd9Sstevel@tonic-gate 4337c478bd9Sstevel@tonic-gate /* 4347c478bd9Sstevel@tonic-gate * Since the vfsops structure is part of the vfssw table and wasn't 4357c478bd9Sstevel@tonic-gate * really allocated, we're not really freeing anything. We keep 4367c478bd9Sstevel@tonic-gate * the name for consistency with vfs_freevfsops(). We do, however, 4377c478bd9Sstevel@tonic-gate * need to take care of a little bookkeeping. 4387c478bd9Sstevel@tonic-gate * NOTE: For a vfsops structure created by vfs_setfsops(), use 4397c478bd9Sstevel@tonic-gate * vfs_freevfsops_by_type(). 4407c478bd9Sstevel@tonic-gate */ 4417c478bd9Sstevel@tonic-gate int 4427c478bd9Sstevel@tonic-gate vfs_freevfsops_by_type(int fstype) 4437c478bd9Sstevel@tonic-gate { 4447c478bd9Sstevel@tonic-gate 4457c478bd9Sstevel@tonic-gate /* Verify that fstype refers to a loaded fs (and not fsid 0). */ 4467c478bd9Sstevel@tonic-gate if ((fstype <= 0) || (fstype >= nfstype)) 4477c478bd9Sstevel@tonic-gate return (EINVAL); 4487c478bd9Sstevel@tonic-gate 4497c478bd9Sstevel@tonic-gate WLOCK_VFSSW(); 4507c478bd9Sstevel@tonic-gate if ((vfssw[fstype].vsw_flag & VSW_INSTALLED) == 0) { 4517c478bd9Sstevel@tonic-gate WUNLOCK_VFSSW(); 4527c478bd9Sstevel@tonic-gate return (EINVAL); 4537c478bd9Sstevel@tonic-gate } 4547c478bd9Sstevel@tonic-gate 4557c478bd9Sstevel@tonic-gate vfssw[fstype].vsw_flag &= ~VSW_INSTALLED; 4567c478bd9Sstevel@tonic-gate WUNLOCK_VFSSW(); 4577c478bd9Sstevel@tonic-gate 4587c478bd9Sstevel@tonic-gate return (0); 4597c478bd9Sstevel@tonic-gate } 4607c478bd9Sstevel@tonic-gate 4617c478bd9Sstevel@tonic-gate /* Support routines used to reference vfs_op */ 4627c478bd9Sstevel@tonic-gate 4637c478bd9Sstevel@tonic-gate /* Set the operations vector for a vfs */ 4647c478bd9Sstevel@tonic-gate void 4657c478bd9Sstevel@tonic-gate vfs_setops(vfs_t *vfsp, vfsops_t *vfsops) 4667c478bd9Sstevel@tonic-gate { 4677c478bd9Sstevel@tonic-gate vfsops_t *op; 4687c478bd9Sstevel@tonic-gate 4697c478bd9Sstevel@tonic-gate ASSERT(vfsp != NULL); 4707c478bd9Sstevel@tonic-gate ASSERT(vfsops != NULL); 4717c478bd9Sstevel@tonic-gate 4727c478bd9Sstevel@tonic-gate op = vfsp->vfs_op; 4737c478bd9Sstevel@tonic-gate membar_consumer(); 474da6c28aaSamw if (vfsp->vfs_femhead == NULL && 47575d94465SJosef 'Jeff' Sipek atomic_cas_ptr(&vfsp->vfs_op, op, vfsops) == op) { 4767c478bd9Sstevel@tonic-gate return; 4777c478bd9Sstevel@tonic-gate } 4787c478bd9Sstevel@tonic-gate fsem_setvfsops(vfsp, vfsops); 4797c478bd9Sstevel@tonic-gate } 4807c478bd9Sstevel@tonic-gate 4817c478bd9Sstevel@tonic-gate /* Retrieve the operations vector for a vfs */ 4827c478bd9Sstevel@tonic-gate vfsops_t * 4837c478bd9Sstevel@tonic-gate vfs_getops(vfs_t *vfsp) 4847c478bd9Sstevel@tonic-gate { 4857c478bd9Sstevel@tonic-gate vfsops_t *op; 4867c478bd9Sstevel@tonic-gate 4877c478bd9Sstevel@tonic-gate ASSERT(vfsp != NULL); 4887c478bd9Sstevel@tonic-gate 4897c478bd9Sstevel@tonic-gate op = vfsp->vfs_op; 4907c478bd9Sstevel@tonic-gate membar_consumer(); 491da6c28aaSamw if (vfsp->vfs_femhead == NULL && op == vfsp->vfs_op) { 4927c478bd9Sstevel@tonic-gate return (op); 4937c478bd9Sstevel@tonic-gate } else { 4947c478bd9Sstevel@tonic-gate return (fsem_getvfsops(vfsp)); 4957c478bd9Sstevel@tonic-gate } 4967c478bd9Sstevel@tonic-gate } 4977c478bd9Sstevel@tonic-gate 4987c478bd9Sstevel@tonic-gate /* 4997c478bd9Sstevel@tonic-gate * Returns non-zero (1) if the vfsops matches that of the vfs. 5007c478bd9Sstevel@tonic-gate * Returns zero (0) if not. 5017c478bd9Sstevel@tonic-gate */ 5027c478bd9Sstevel@tonic-gate int 5037c478bd9Sstevel@tonic-gate vfs_matchops(vfs_t *vfsp, vfsops_t *vfsops) 5047c478bd9Sstevel@tonic-gate { 5057c478bd9Sstevel@tonic-gate return (vfs_getops(vfsp) == vfsops); 5067c478bd9Sstevel@tonic-gate } 5077c478bd9Sstevel@tonic-gate 5087c478bd9Sstevel@tonic-gate /* 5097c478bd9Sstevel@tonic-gate * Returns non-zero (1) if the file system has installed a non-default, 5107c478bd9Sstevel@tonic-gate * non-error vfs_sync routine. Returns zero (0) otherwise. 5117c478bd9Sstevel@tonic-gate */ 5127c478bd9Sstevel@tonic-gate int 5137c478bd9Sstevel@tonic-gate vfs_can_sync(vfs_t *vfsp) 5147c478bd9Sstevel@tonic-gate { 5157c478bd9Sstevel@tonic-gate /* vfs_sync() routine is not the default/error function */ 5167c478bd9Sstevel@tonic-gate return (vfs_getops(vfsp)->vfs_sync != fs_sync); 5177c478bd9Sstevel@tonic-gate } 5187c478bd9Sstevel@tonic-gate 5197c478bd9Sstevel@tonic-gate /* 5207c478bd9Sstevel@tonic-gate * Initialize a vfs structure. 5217c478bd9Sstevel@tonic-gate */ 5227c478bd9Sstevel@tonic-gate void 5237c478bd9Sstevel@tonic-gate vfs_init(vfs_t *vfsp, vfsops_t *op, void *data) 5247c478bd9Sstevel@tonic-gate { 525da6c28aaSamw /* Other initialization has been moved to vfs_alloc() */ 5267c478bd9Sstevel@tonic-gate vfsp->vfs_count = 0; 5277c478bd9Sstevel@tonic-gate vfsp->vfs_next = vfsp; 5287c478bd9Sstevel@tonic-gate vfsp->vfs_prev = vfsp; 5297c478bd9Sstevel@tonic-gate vfsp->vfs_zone_next = vfsp; 5307c478bd9Sstevel@tonic-gate vfsp->vfs_zone_prev = vfsp; 531406fc510SToomas Soome vfsp->vfs_lofi_id = 0; 532da6c28aaSamw sema_init(&vfsp->vfs_reflock, 1, NULL, SEMA_DEFAULT, NULL); 533da6c28aaSamw vfsimpl_setup(vfsp); 5347c478bd9Sstevel@tonic-gate vfsp->vfs_data = (data); 5357c478bd9Sstevel@tonic-gate vfs_setops((vfsp), (op)); 5367c478bd9Sstevel@tonic-gate } 5377c478bd9Sstevel@tonic-gate 538ddfcde86Srsb /* 539ddfcde86Srsb * Allocate and initialize the vfs implementation private data 540ddfcde86Srsb * structure, vfs_impl_t. 541ddfcde86Srsb */ 542ddfcde86Srsb void 543ddfcde86Srsb vfsimpl_setup(vfs_t *vfsp) 544ddfcde86Srsb { 545da6c28aaSamw int i; 546da6c28aaSamw 547da6c28aaSamw if (vfsp->vfs_implp != NULL) { 548da6c28aaSamw return; 549da6c28aaSamw } 550da6c28aaSamw 551ddfcde86Srsb vfsp->vfs_implp = kmem_alloc(sizeof (vfs_impl_t), KM_SLEEP); 552da6c28aaSamw /* Note that these are #define'd in vfs.h */ 553ddfcde86Srsb vfsp->vfs_vskap = NULL; 554ddfcde86Srsb vfsp->vfs_fstypevsp = NULL; 555da6c28aaSamw 556da6c28aaSamw /* Set size of counted array, then zero the array */ 557da6c28aaSamw vfsp->vfs_featureset[0] = VFS_FEATURE_MAXSZ - 1; 558da6c28aaSamw for (i = 1; i < VFS_FEATURE_MAXSZ; i++) { 559da6c28aaSamw vfsp->vfs_featureset[i] = 0; 560da6c28aaSamw } 561ddfcde86Srsb } 562ddfcde86Srsb 563ddfcde86Srsb /* 564ddfcde86Srsb * Release the vfs_impl_t structure, if it exists. Some unbundled 565ddfcde86Srsb * filesystems may not use the newer version of vfs and thus 566ddfcde86Srsb * would not contain this implementation private data structure. 567ddfcde86Srsb */ 568ddfcde86Srsb void 569ddfcde86Srsb vfsimpl_teardown(vfs_t *vfsp) 570ddfcde86Srsb { 571ddfcde86Srsb vfs_impl_t *vip = vfsp->vfs_implp; 572ddfcde86Srsb 573ddfcde86Srsb if (vip == NULL) 574ddfcde86Srsb return; 575ddfcde86Srsb 576ddfcde86Srsb kmem_free(vfsp->vfs_implp, sizeof (vfs_impl_t)); 577ddfcde86Srsb vfsp->vfs_implp = NULL; 578ddfcde86Srsb } 5797c478bd9Sstevel@tonic-gate 5807c478bd9Sstevel@tonic-gate /* 5817c478bd9Sstevel@tonic-gate * VFS system calls: mount, umount, syssync, statfs, fstatfs, statvfs, 5827c478bd9Sstevel@tonic-gate * fstatvfs, and sysfs moved to common/syscall. 5837c478bd9Sstevel@tonic-gate */ 5847c478bd9Sstevel@tonic-gate 5857c478bd9Sstevel@tonic-gate /* 5867c478bd9Sstevel@tonic-gate * Update every mounted file system. We call the vfs_sync operation of 5877c478bd9Sstevel@tonic-gate * each file system type, passing it a NULL vfsp to indicate that all 5887c478bd9Sstevel@tonic-gate * mounted file systems of that type should be updated. 5897c478bd9Sstevel@tonic-gate */ 5907c478bd9Sstevel@tonic-gate void 5917c478bd9Sstevel@tonic-gate vfs_sync(int flag) 5927c478bd9Sstevel@tonic-gate { 5937c478bd9Sstevel@tonic-gate struct vfssw *vswp; 5947c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 5957c478bd9Sstevel@tonic-gate for (vswp = &vfssw[1]; vswp < &vfssw[nfstype]; vswp++) { 5967c478bd9Sstevel@tonic-gate if (ALLOCATED_VFSSW(vswp) && VFS_INSTALLED(vswp)) { 5977c478bd9Sstevel@tonic-gate vfs_refvfssw(vswp); 5987c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 5997c478bd9Sstevel@tonic-gate (void) (*vswp->vsw_vfsops.vfs_sync)(NULL, flag, 6007c478bd9Sstevel@tonic-gate CRED()); 6017c478bd9Sstevel@tonic-gate vfs_unrefvfssw(vswp); 6027c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 6037c478bd9Sstevel@tonic-gate } 6047c478bd9Sstevel@tonic-gate } 6057c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 6067c478bd9Sstevel@tonic-gate } 6077c478bd9Sstevel@tonic-gate 6087c478bd9Sstevel@tonic-gate void 6097c478bd9Sstevel@tonic-gate sync(void) 6107c478bd9Sstevel@tonic-gate { 6117c478bd9Sstevel@tonic-gate vfs_sync(0); 6127c478bd9Sstevel@tonic-gate } 6137c478bd9Sstevel@tonic-gate 6147c478bd9Sstevel@tonic-gate /* 6157c478bd9Sstevel@tonic-gate * External routines. 6167c478bd9Sstevel@tonic-gate */ 6177c478bd9Sstevel@tonic-gate 6187c478bd9Sstevel@tonic-gate krwlock_t vfssw_lock; /* lock accesses to vfssw */ 6197c478bd9Sstevel@tonic-gate 6207c478bd9Sstevel@tonic-gate /* 6217c478bd9Sstevel@tonic-gate * Lock for accessing the vfs linked list. Initialized in vfs_mountroot(), 6227c478bd9Sstevel@tonic-gate * but otherwise should be accessed only via vfs_list_lock() and 6237c478bd9Sstevel@tonic-gate * vfs_list_unlock(). Also used to protect the timestamp for mods to the list. 6247c478bd9Sstevel@tonic-gate */ 6257c478bd9Sstevel@tonic-gate static krwlock_t vfslist; 6267c478bd9Sstevel@tonic-gate 6277c478bd9Sstevel@tonic-gate /* 6287c478bd9Sstevel@tonic-gate * Mount devfs on /devices. This is done right after root is mounted 6297c478bd9Sstevel@tonic-gate * to provide device access support for the system 6307c478bd9Sstevel@tonic-gate */ 6317c478bd9Sstevel@tonic-gate static void 6327c478bd9Sstevel@tonic-gate vfs_mountdevices(void) 6337c478bd9Sstevel@tonic-gate { 6347c478bd9Sstevel@tonic-gate struct vfssw *vsw; 6357c478bd9Sstevel@tonic-gate struct vnode *mvp; 6367c478bd9Sstevel@tonic-gate struct mounta mounta = { /* fake mounta for devfs_mount() */ 6377c478bd9Sstevel@tonic-gate NULL, 6387c478bd9Sstevel@tonic-gate NULL, 6397c478bd9Sstevel@tonic-gate MS_SYSSPACE, 6407c478bd9Sstevel@tonic-gate NULL, 6417c478bd9Sstevel@tonic-gate NULL, 6427c478bd9Sstevel@tonic-gate 0, 6437c478bd9Sstevel@tonic-gate NULL, 6447c478bd9Sstevel@tonic-gate 0 6457c478bd9Sstevel@tonic-gate }; 6467c478bd9Sstevel@tonic-gate 6477c478bd9Sstevel@tonic-gate /* 6487c478bd9Sstevel@tonic-gate * _init devfs module to fill in the vfssw 6497c478bd9Sstevel@tonic-gate */ 6507c478bd9Sstevel@tonic-gate if (modload("fs", "devfs") == -1) 651ae115bc7Smrj panic("Cannot _init devfs module"); 6527c478bd9Sstevel@tonic-gate 6537c478bd9Sstevel@tonic-gate /* 6547c478bd9Sstevel@tonic-gate * Hold vfs 6557c478bd9Sstevel@tonic-gate */ 6567c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 6577c478bd9Sstevel@tonic-gate vsw = vfs_getvfsswbyname("devfs"); 6587c478bd9Sstevel@tonic-gate VFS_INIT(&devices, &vsw->vsw_vfsops, NULL); 6597c478bd9Sstevel@tonic-gate VFS_HOLD(&devices); 6607c478bd9Sstevel@tonic-gate 6617c478bd9Sstevel@tonic-gate /* 6627c478bd9Sstevel@tonic-gate * Locate mount point 6637c478bd9Sstevel@tonic-gate */ 6647c478bd9Sstevel@tonic-gate if (lookupname("/devices", UIO_SYSSPACE, FOLLOW, NULLVPP, &mvp)) 665ae115bc7Smrj panic("Cannot find /devices"); 6667c478bd9Sstevel@tonic-gate 6677c478bd9Sstevel@tonic-gate /* 6687c478bd9Sstevel@tonic-gate * Perform the mount of /devices 6697c478bd9Sstevel@tonic-gate */ 6707c478bd9Sstevel@tonic-gate if (VFS_MOUNT(&devices, mvp, &mounta, CRED())) 671ae115bc7Smrj panic("Cannot mount /devices"); 6727c478bd9Sstevel@tonic-gate 6737c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 6747c478bd9Sstevel@tonic-gate 6757c478bd9Sstevel@tonic-gate /* 6767c478bd9Sstevel@tonic-gate * Set appropriate members and add to vfs list for mnttab display 6777c478bd9Sstevel@tonic-gate */ 678d7de0ceaSRobert Harris vfs_setresource(&devices, "/devices", 0); 679d7de0ceaSRobert Harris vfs_setmntpoint(&devices, "/devices", 0); 6807c478bd9Sstevel@tonic-gate 6817c478bd9Sstevel@tonic-gate /* 6827c478bd9Sstevel@tonic-gate * Hold the root of /devices so it won't go away 6837c478bd9Sstevel@tonic-gate */ 6847c478bd9Sstevel@tonic-gate if (VFS_ROOT(&devices, &devicesdir)) 685ae115bc7Smrj panic("vfs_mountdevices: not devices root"); 6867c478bd9Sstevel@tonic-gate 6877c478bd9Sstevel@tonic-gate if (vfs_lock(&devices) != 0) { 688facf4a8dSllai VN_RELE(devicesdir); 6897c478bd9Sstevel@tonic-gate cmn_err(CE_NOTE, "Cannot acquire vfs_lock of /devices"); 6907c478bd9Sstevel@tonic-gate return; 6917c478bd9Sstevel@tonic-gate } 6927c478bd9Sstevel@tonic-gate 6937c478bd9Sstevel@tonic-gate if (vn_vfswlock(mvp) != 0) { 6947c478bd9Sstevel@tonic-gate vfs_unlock(&devices); 695facf4a8dSllai VN_RELE(devicesdir); 6967c478bd9Sstevel@tonic-gate cmn_err(CE_NOTE, "Cannot acquire vfswlock of /devices"); 6977c478bd9Sstevel@tonic-gate return; 6987c478bd9Sstevel@tonic-gate } 6997c478bd9Sstevel@tonic-gate 7007c478bd9Sstevel@tonic-gate vfs_add(mvp, &devices, 0); 7017c478bd9Sstevel@tonic-gate vn_vfsunlock(mvp); 7027c478bd9Sstevel@tonic-gate vfs_unlock(&devices); 703facf4a8dSllai VN_RELE(devicesdir); 704facf4a8dSllai } 705facf4a8dSllai 706facf4a8dSllai /* 707facf4a8dSllai * mount the first instance of /dev to root and remain mounted 708facf4a8dSllai */ 709facf4a8dSllai static void 710facf4a8dSllai vfs_mountdev1(void) 711facf4a8dSllai { 712facf4a8dSllai struct vfssw *vsw; 713facf4a8dSllai struct vnode *mvp; 714facf4a8dSllai struct mounta mounta = { /* fake mounta for sdev_mount() */ 715facf4a8dSllai NULL, 716facf4a8dSllai NULL, 717facf4a8dSllai MS_SYSSPACE | MS_OVERLAY, 718facf4a8dSllai NULL, 719facf4a8dSllai NULL, 720facf4a8dSllai 0, 721facf4a8dSllai NULL, 722facf4a8dSllai 0 723facf4a8dSllai }; 724facf4a8dSllai 725facf4a8dSllai /* 726facf4a8dSllai * _init dev module to fill in the vfssw 727facf4a8dSllai */ 728facf4a8dSllai if (modload("fs", "dev") == -1) 729facf4a8dSllai cmn_err(CE_PANIC, "Cannot _init dev module\n"); 730facf4a8dSllai 731facf4a8dSllai /* 732facf4a8dSllai * Hold vfs 733facf4a8dSllai */ 734facf4a8dSllai RLOCK_VFSSW(); 735facf4a8dSllai vsw = vfs_getvfsswbyname("dev"); 736facf4a8dSllai VFS_INIT(&dev, &vsw->vsw_vfsops, NULL); 737facf4a8dSllai VFS_HOLD(&dev); 738facf4a8dSllai 739facf4a8dSllai /* 740facf4a8dSllai * Locate mount point 741facf4a8dSllai */ 742facf4a8dSllai if (lookupname("/dev", UIO_SYSSPACE, FOLLOW, NULLVPP, &mvp)) 743facf4a8dSllai cmn_err(CE_PANIC, "Cannot find /dev\n"); 744facf4a8dSllai 745facf4a8dSllai /* 746facf4a8dSllai * Perform the mount of /dev 747facf4a8dSllai */ 748facf4a8dSllai if (VFS_MOUNT(&dev, mvp, &mounta, CRED())) 749facf4a8dSllai cmn_err(CE_PANIC, "Cannot mount /dev 1\n"); 750facf4a8dSllai 751facf4a8dSllai RUNLOCK_VFSSW(); 752facf4a8dSllai 753facf4a8dSllai /* 754facf4a8dSllai * Set appropriate members and add to vfs list for mnttab display 755facf4a8dSllai */ 756d7de0ceaSRobert Harris vfs_setresource(&dev, "/dev", 0); 757d7de0ceaSRobert Harris vfs_setmntpoint(&dev, "/dev", 0); 758facf4a8dSllai 759facf4a8dSllai /* 760facf4a8dSllai * Hold the root of /dev so it won't go away 761facf4a8dSllai */ 762facf4a8dSllai if (VFS_ROOT(&dev, &devdir)) 763facf4a8dSllai cmn_err(CE_PANIC, "vfs_mountdev1: not dev root"); 764facf4a8dSllai 765facf4a8dSllai if (vfs_lock(&dev) != 0) { 766facf4a8dSllai VN_RELE(devdir); 767facf4a8dSllai cmn_err(CE_NOTE, "Cannot acquire vfs_lock of /dev"); 768facf4a8dSllai return; 769facf4a8dSllai } 770facf4a8dSllai 771facf4a8dSllai if (vn_vfswlock(mvp) != 0) { 772facf4a8dSllai vfs_unlock(&dev); 773facf4a8dSllai VN_RELE(devdir); 774facf4a8dSllai cmn_err(CE_NOTE, "Cannot acquire vfswlock of /dev"); 775facf4a8dSllai return; 776facf4a8dSllai } 777facf4a8dSllai 778facf4a8dSllai vfs_add(mvp, &dev, 0); 779facf4a8dSllai vn_vfsunlock(mvp); 780facf4a8dSllai vfs_unlock(&dev); 781facf4a8dSllai VN_RELE(devdir); 7827c478bd9Sstevel@tonic-gate } 7837c478bd9Sstevel@tonic-gate 7847c478bd9Sstevel@tonic-gate /* 7857c478bd9Sstevel@tonic-gate * Mount required filesystem. This is done right after root is mounted. 7867c478bd9Sstevel@tonic-gate */ 7877c478bd9Sstevel@tonic-gate static void 7887c478bd9Sstevel@tonic-gate vfs_mountfs(char *module, char *spec, char *path) 7897c478bd9Sstevel@tonic-gate { 7907c478bd9Sstevel@tonic-gate struct vnode *mvp; 7917c478bd9Sstevel@tonic-gate struct mounta mounta; 7927c478bd9Sstevel@tonic-gate vfs_t *vfsp; 7937c478bd9Sstevel@tonic-gate 7947c478bd9Sstevel@tonic-gate mounta.flags = MS_SYSSPACE | MS_DATA; 7957c478bd9Sstevel@tonic-gate mounta.fstype = module; 7967c478bd9Sstevel@tonic-gate mounta.spec = spec; 7977c478bd9Sstevel@tonic-gate mounta.dir = path; 7987c478bd9Sstevel@tonic-gate if (lookupname(path, UIO_SYSSPACE, FOLLOW, NULLVPP, &mvp)) { 799ae115bc7Smrj cmn_err(CE_WARN, "Cannot find %s", path); 8007c478bd9Sstevel@tonic-gate return; 8017c478bd9Sstevel@tonic-gate } 8027c478bd9Sstevel@tonic-gate if (domount(NULL, &mounta, mvp, CRED(), &vfsp)) 803ae115bc7Smrj cmn_err(CE_WARN, "Cannot mount %s", path); 8047c478bd9Sstevel@tonic-gate else 8057c478bd9Sstevel@tonic-gate VFS_RELE(vfsp); 8067c478bd9Sstevel@tonic-gate VN_RELE(mvp); 8077c478bd9Sstevel@tonic-gate } 8087c478bd9Sstevel@tonic-gate 8097c478bd9Sstevel@tonic-gate /* 8107c478bd9Sstevel@tonic-gate * vfs_mountroot is called by main() to mount the root filesystem. 8117c478bd9Sstevel@tonic-gate */ 8127c478bd9Sstevel@tonic-gate void 8137c478bd9Sstevel@tonic-gate vfs_mountroot(void) 8147c478bd9Sstevel@tonic-gate { 8157c478bd9Sstevel@tonic-gate struct vnode *rvp = NULL; 8167c478bd9Sstevel@tonic-gate char *path; 8177c478bd9Sstevel@tonic-gate size_t plen; 8185a59a8b3Srsb struct vfssw *vswp; 81935a5a358SJonathan Adams proc_t *p; 8207c478bd9Sstevel@tonic-gate 8217c478bd9Sstevel@tonic-gate rw_init(&vfssw_lock, NULL, RW_DEFAULT, NULL); 8227c478bd9Sstevel@tonic-gate rw_init(&vfslist, NULL, RW_DEFAULT, NULL); 8237c478bd9Sstevel@tonic-gate 8247c478bd9Sstevel@tonic-gate /* 8257c478bd9Sstevel@tonic-gate * Alloc the vfs hash bucket array and locks 8267c478bd9Sstevel@tonic-gate */ 8277c478bd9Sstevel@tonic-gate rvfs_list = kmem_zalloc(vfshsz * sizeof (rvfs_t), KM_SLEEP); 8287c478bd9Sstevel@tonic-gate 8297c478bd9Sstevel@tonic-gate /* 8307c478bd9Sstevel@tonic-gate * Call machine-dependent routine "rootconf" to choose a root 8317c478bd9Sstevel@tonic-gate * file system type. 8327c478bd9Sstevel@tonic-gate */ 8337c478bd9Sstevel@tonic-gate if (rootconf()) 834ae115bc7Smrj panic("vfs_mountroot: cannot mount root"); 8357c478bd9Sstevel@tonic-gate /* 8367c478bd9Sstevel@tonic-gate * Get vnode for '/'. Set up rootdir, u.u_rdir and u.u_cdir 8377c478bd9Sstevel@tonic-gate * to point to it. These are used by lookuppn() so that it 8387c478bd9Sstevel@tonic-gate * knows where to start from ('/' or '.'). 8397c478bd9Sstevel@tonic-gate */ 840d7de0ceaSRobert Harris vfs_setmntpoint(rootvfs, "/", 0); 8417c478bd9Sstevel@tonic-gate if (VFS_ROOT(rootvfs, &rootdir)) 842ae115bc7Smrj panic("vfs_mountroot: no root vnode"); 84335a5a358SJonathan Adams 84435a5a358SJonathan Adams /* 84535a5a358SJonathan Adams * At this point, the process tree consists of p0 and possibly some 84635a5a358SJonathan Adams * direct children of p0. (i.e. there are no grandchildren) 84735a5a358SJonathan Adams * 84835a5a358SJonathan Adams * Walk through them all, setting their current directory. 84935a5a358SJonathan Adams */ 85035a5a358SJonathan Adams mutex_enter(&pidlock); 85135a5a358SJonathan Adams for (p = practive; p != NULL; p = p->p_next) { 85235a5a358SJonathan Adams ASSERT(p == &p0 || p->p_parent == &p0); 85335a5a358SJonathan Adams 85435a5a358SJonathan Adams PTOU(p)->u_cdir = rootdir; 85535a5a358SJonathan Adams VN_HOLD(PTOU(p)->u_cdir); 85635a5a358SJonathan Adams PTOU(p)->u_rdir = NULL; 85735a5a358SJonathan Adams } 85835a5a358SJonathan Adams mutex_exit(&pidlock); 8597c478bd9Sstevel@tonic-gate 8607c478bd9Sstevel@tonic-gate /* 8617c478bd9Sstevel@tonic-gate * Setup the global zone's rootvp, now that it exists. 8627c478bd9Sstevel@tonic-gate */ 8637c478bd9Sstevel@tonic-gate global_zone->zone_rootvp = rootdir; 8647c478bd9Sstevel@tonic-gate VN_HOLD(global_zone->zone_rootvp); 8657c478bd9Sstevel@tonic-gate 8667c478bd9Sstevel@tonic-gate /* 8677c478bd9Sstevel@tonic-gate * Notify the module code that it can begin using the 8687c478bd9Sstevel@tonic-gate * root filesystem instead of the boot program's services. 8697c478bd9Sstevel@tonic-gate */ 8707c478bd9Sstevel@tonic-gate modrootloaded = 1; 871e7cbe64fSgw 872e7cbe64fSgw /* 873e7cbe64fSgw * Special handling for a ZFS root file system. 874e7cbe64fSgw */ 875e7cbe64fSgw zfs_boot_init(); 876e7cbe64fSgw 8777c478bd9Sstevel@tonic-gate /* 8787c478bd9Sstevel@tonic-gate * Set up mnttab information for root 8797c478bd9Sstevel@tonic-gate */ 880d7de0ceaSRobert Harris vfs_setresource(rootvfs, rootfs.bo_name, 0); 8817c478bd9Sstevel@tonic-gate 8827c478bd9Sstevel@tonic-gate /* 8837c478bd9Sstevel@tonic-gate * Notify cluster software that the root filesystem is available. 8847c478bd9Sstevel@tonic-gate */ 8857c478bd9Sstevel@tonic-gate clboot_mountroot(); 8867c478bd9Sstevel@tonic-gate 8875a59a8b3Srsb /* Now that we're all done with the root FS, set up its vopstats */ 8885a59a8b3Srsb if ((vswp = vfs_getvfsswbyvfsops(vfs_getops(rootvfs))) != NULL) { 8895a59a8b3Srsb /* Set flag for statistics collection */ 8905a59a8b3Srsb if (vswp->vsw_flag & VSW_STATS) { 89182c7f3c4Srsb initialize_vopstats(&rootvfs->vfs_vopstats); 8925a59a8b3Srsb rootvfs->vfs_flag |= VFS_STATS; 89382c7f3c4Srsb rootvfs->vfs_fstypevsp = 89482c7f3c4Srsb get_fstype_vopstats(rootvfs, vswp); 89582c7f3c4Srsb rootvfs->vfs_vskap = get_vskstat_anchor(rootvfs); 8965a59a8b3Srsb } 8975a59a8b3Srsb vfs_unrefvfssw(vswp); 8985a59a8b3Srsb } 8995a59a8b3Srsb 9007c478bd9Sstevel@tonic-gate /* 901facf4a8dSllai * Mount /devices, /dev instance 1, /system/contract, /etc/mnttab, 902a237e38eSth * /etc/svc/volatile, /etc/dfs/sharetab, /system/object, and /proc. 9037c478bd9Sstevel@tonic-gate */ 9047c478bd9Sstevel@tonic-gate vfs_mountdevices(); 905facf4a8dSllai vfs_mountdev1(); 9067c478bd9Sstevel@tonic-gate 9077c478bd9Sstevel@tonic-gate vfs_mountfs("ctfs", "ctfs", CTFS_ROOT); 9087c478bd9Sstevel@tonic-gate vfs_mountfs("proc", "/proc", "/proc"); 9097c478bd9Sstevel@tonic-gate vfs_mountfs("mntfs", "/etc/mnttab", "/etc/mnttab"); 9107c478bd9Sstevel@tonic-gate vfs_mountfs("tmpfs", "/etc/svc/volatile", "/etc/svc/volatile"); 9117c478bd9Sstevel@tonic-gate vfs_mountfs("objfs", "objfs", OBJFS_ROOT); 91276ca3cb0SRobert Mustacchi vfs_mountfs("bootfs", "bootfs", "/system/boot"); 9137c478bd9Sstevel@tonic-gate 914a237e38eSth if (getzoneid() == GLOBAL_ZONEID) { 915a237e38eSth vfs_mountfs("sharefs", "sharefs", "/etc/dfs/sharetab"); 916a237e38eSth } 917a237e38eSth 918bde2df36SYuri Pankov if (strcmp(rootfs.bo_fstype, "zfs") != 0) { 919bde2df36SYuri Pankov /* 920bde2df36SYuri Pankov * Look up the root device via devfs so that a dv_node is 921bde2df36SYuri Pankov * created for it. The vnode is never VN_RELE()ed. 922bde2df36SYuri Pankov * We allocate more than MAXPATHLEN so that the 923bde2df36SYuri Pankov * buffer passed to i_ddi_prompath_to_devfspath() is 924bde2df36SYuri Pankov * exactly MAXPATHLEN (the function expects a buffer 925bde2df36SYuri Pankov * of that length). 926bde2df36SYuri Pankov */ 927bde2df36SYuri Pankov plen = strlen("/devices"); 928bde2df36SYuri Pankov path = kmem_alloc(plen + MAXPATHLEN, KM_SLEEP); 929bde2df36SYuri Pankov (void) strcpy(path, "/devices"); 9307c478bd9Sstevel@tonic-gate 931bde2df36SYuri Pankov if (i_ddi_prompath_to_devfspath(rootfs.bo_name, path + plen) 932bde2df36SYuri Pankov != DDI_SUCCESS || 933bde2df36SYuri Pankov lookupname(path, UIO_SYSSPACE, FOLLOW, NULLVPP, &rvp)) { 9347c478bd9Sstevel@tonic-gate 935bde2df36SYuri Pankov /* NUL terminate in case "path" has garbage */ 936bde2df36SYuri Pankov path[plen + MAXPATHLEN - 1] = '\0'; 9377c478bd9Sstevel@tonic-gate #ifdef DEBUG 938bde2df36SYuri Pankov cmn_err(CE_WARN, "!Cannot lookup root device: %s", 939bde2df36SYuri Pankov path); 9407c478bd9Sstevel@tonic-gate #endif 941bde2df36SYuri Pankov } 942bde2df36SYuri Pankov kmem_free(path, plen + MAXPATHLEN); 9437c478bd9Sstevel@tonic-gate } 944bde2df36SYuri Pankov 945df2381bfSpraks vfs_mnttabvp_setup(); 9467c478bd9Sstevel@tonic-gate } 9477c478bd9Sstevel@tonic-gate 94893239addSjohnlev /* 94993239addSjohnlev * Check to see if our "block device" is actually a file. If so, 95093239addSjohnlev * automatically add a lofi device, and keep track of this fact. 95193239addSjohnlev */ 95293239addSjohnlev static int 95393239addSjohnlev lofi_add(const char *fsname, struct vfs *vfsp, 95493239addSjohnlev mntopts_t *mntopts, struct mounta *uap) 95593239addSjohnlev { 95693239addSjohnlev int fromspace = (uap->flags & MS_SYSSPACE) ? 95793239addSjohnlev UIO_SYSSPACE : UIO_USERSPACE; 95893239addSjohnlev struct lofi_ioctl *li = NULL; 95993239addSjohnlev struct vnode *vp = NULL; 96093239addSjohnlev struct pathname pn = { NULL }; 96193239addSjohnlev ldi_ident_t ldi_id; 96293239addSjohnlev ldi_handle_t ldi_hdl; 96343d5cd3dSjohnlev vfssw_t *vfssw; 964406fc510SToomas Soome int id; 96593239addSjohnlev int err = 0; 96693239addSjohnlev 9670fbb751dSJohn Levon if ((vfssw = vfs_getvfssw(fsname)) == NULL) 96893239addSjohnlev return (0); 96943d5cd3dSjohnlev 97043d5cd3dSjohnlev if (!(vfssw->vsw_flag & VSW_CANLOFI)) { 97143d5cd3dSjohnlev vfs_unrefvfssw(vfssw); 97293239addSjohnlev return (0); 97343d5cd3dSjohnlev } 97443d5cd3dSjohnlev 97543d5cd3dSjohnlev vfs_unrefvfssw(vfssw); 97643d5cd3dSjohnlev vfssw = NULL; 97793239addSjohnlev 97893239addSjohnlev if (pn_get(uap->spec, fromspace, &pn) != 0) 97993239addSjohnlev return (0); 98093239addSjohnlev 98193239addSjohnlev if (lookupname(uap->spec, fromspace, FOLLOW, NULL, &vp) != 0) 98293239addSjohnlev goto out; 98393239addSjohnlev 98493239addSjohnlev if (vp->v_type != VREG) 98593239addSjohnlev goto out; 98693239addSjohnlev 98793239addSjohnlev /* OK, this is a lofi mount. */ 98893239addSjohnlev 98993239addSjohnlev if ((uap->flags & (MS_REMOUNT|MS_GLOBAL)) || 99093239addSjohnlev vfs_optionisset_nolock(mntopts, MNTOPT_SUID, NULL) || 99193239addSjohnlev vfs_optionisset_nolock(mntopts, MNTOPT_SETUID, NULL) || 99293239addSjohnlev vfs_optionisset_nolock(mntopts, MNTOPT_DEVICES, NULL)) { 99393239addSjohnlev err = EINVAL; 99493239addSjohnlev goto out; 99593239addSjohnlev } 99693239addSjohnlev 99793239addSjohnlev ldi_id = ldi_ident_from_anon(); 99893239addSjohnlev li = kmem_zalloc(sizeof (*li), KM_SLEEP); 9996f02aa44SDina K Nimeh (void) strlcpy(li->li_filename, pn.pn_path, MAXPATHLEN); 100093239addSjohnlev 10010fbb751dSJohn Levon err = ldi_open_by_name("/dev/lofictl", FREAD | FWRITE, kcred, 10020fbb751dSJohn Levon &ldi_hdl, ldi_id); 100393239addSjohnlev 100493239addSjohnlev if (err) 100593239addSjohnlev goto out2; 100693239addSjohnlev 100793239addSjohnlev err = ldi_ioctl(ldi_hdl, LOFI_MAP_FILE, (intptr_t)li, 1008406fc510SToomas Soome FREAD | FWRITE | FKIOCTL, kcred, &id); 100993239addSjohnlev 10100fbb751dSJohn Levon (void) ldi_close(ldi_hdl, FREAD | FWRITE, kcred); 101193239addSjohnlev 101293239addSjohnlev if (!err) 1013406fc510SToomas Soome vfsp->vfs_lofi_id = id; 101493239addSjohnlev 101593239addSjohnlev out2: 101693239addSjohnlev ldi_ident_release(ldi_id); 101793239addSjohnlev out: 101893239addSjohnlev if (li != NULL) 101993239addSjohnlev kmem_free(li, sizeof (*li)); 102093239addSjohnlev if (vp != NULL) 102193239addSjohnlev VN_RELE(vp); 102293239addSjohnlev pn_free(&pn); 102393239addSjohnlev return (err); 102493239addSjohnlev } 102593239addSjohnlev 102693239addSjohnlev static void 102793239addSjohnlev lofi_remove(struct vfs *vfsp) 102893239addSjohnlev { 102993239addSjohnlev struct lofi_ioctl *li = NULL; 103093239addSjohnlev ldi_ident_t ldi_id; 103193239addSjohnlev ldi_handle_t ldi_hdl; 103293239addSjohnlev int err; 103393239addSjohnlev 1034406fc510SToomas Soome if (vfsp->vfs_lofi_id == 0) 103593239addSjohnlev return; 103693239addSjohnlev 103793239addSjohnlev ldi_id = ldi_ident_from_anon(); 103893239addSjohnlev 103993239addSjohnlev li = kmem_zalloc(sizeof (*li), KM_SLEEP); 1040406fc510SToomas Soome li->li_id = vfsp->vfs_lofi_id; 104193239addSjohnlev li->li_cleanup = B_TRUE; 104293239addSjohnlev 10430fbb751dSJohn Levon err = ldi_open_by_name("/dev/lofictl", FREAD | FWRITE, kcred, 10440fbb751dSJohn Levon &ldi_hdl, ldi_id); 104593239addSjohnlev 104693239addSjohnlev if (err) 104793239addSjohnlev goto out; 104893239addSjohnlev 104993239addSjohnlev err = ldi_ioctl(ldi_hdl, LOFI_UNMAP_FILE_MINOR, (intptr_t)li, 10500fbb751dSJohn Levon FREAD | FWRITE | FKIOCTL, kcred, NULL); 105193239addSjohnlev 10520fbb751dSJohn Levon (void) ldi_close(ldi_hdl, FREAD | FWRITE, kcred); 105393239addSjohnlev 105493239addSjohnlev if (!err) 1055406fc510SToomas Soome vfsp->vfs_lofi_id = 0; 105693239addSjohnlev 105793239addSjohnlev out: 105893239addSjohnlev ldi_ident_release(ldi_id); 105993239addSjohnlev if (li != NULL) 106093239addSjohnlev kmem_free(li, sizeof (*li)); 106193239addSjohnlev } 106293239addSjohnlev 10637c478bd9Sstevel@tonic-gate /* 10647c478bd9Sstevel@tonic-gate * Common mount code. Called from the system call entry point, from autofs, 1065b9238976Sth * nfsv4 trigger mounts, and from pxfs. 10667c478bd9Sstevel@tonic-gate * 10677c478bd9Sstevel@tonic-gate * Takes the effective file system type, mount arguments, the mount point 10687c478bd9Sstevel@tonic-gate * vnode, flags specifying whether the mount is a remount and whether it 10697c478bd9Sstevel@tonic-gate * should be entered into the vfs list, and credentials. Fills in its vfspp 10707c478bd9Sstevel@tonic-gate * parameter with the mounted file system instance's vfs. 10717c478bd9Sstevel@tonic-gate * 10727c478bd9Sstevel@tonic-gate * Note that the effective file system type is specified as a string. It may 10737c478bd9Sstevel@tonic-gate * be null, in which case it's determined from the mount arguments, and may 10747c478bd9Sstevel@tonic-gate * differ from the type specified in the mount arguments; this is a hook to 10757c478bd9Sstevel@tonic-gate * allow interposition when instantiating file system instances. 10767c478bd9Sstevel@tonic-gate * 10777c478bd9Sstevel@tonic-gate * The caller is responsible for releasing its own hold on the mount point 10787c478bd9Sstevel@tonic-gate * vp (this routine does its own hold when necessary). 10797c478bd9Sstevel@tonic-gate * Also note that for remounts, the mount point vp should be the vnode for 10807c478bd9Sstevel@tonic-gate * the root of the file system rather than the vnode that the file system 10817c478bd9Sstevel@tonic-gate * is mounted on top of. 10827c478bd9Sstevel@tonic-gate */ 10837c478bd9Sstevel@tonic-gate int 10847c478bd9Sstevel@tonic-gate domount(char *fsname, struct mounta *uap, vnode_t *vp, struct cred *credp, 1085406fc510SToomas Soome struct vfs **vfspp) 10867c478bd9Sstevel@tonic-gate { 10877c478bd9Sstevel@tonic-gate struct vfssw *vswp; 10887c478bd9Sstevel@tonic-gate vfsops_t *vfsops; 10897c478bd9Sstevel@tonic-gate struct vfs *vfsp; 10907c478bd9Sstevel@tonic-gate struct vnode *bvp; 10917c478bd9Sstevel@tonic-gate dev_t bdev = 0; 10927c478bd9Sstevel@tonic-gate mntopts_t mnt_mntopts; 10937c478bd9Sstevel@tonic-gate int error = 0; 10947c478bd9Sstevel@tonic-gate int copyout_error = 0; 10957c478bd9Sstevel@tonic-gate int ovflags; 10967c478bd9Sstevel@tonic-gate char *opts = uap->optptr; 10977c478bd9Sstevel@tonic-gate char *inargs = opts; 10987c478bd9Sstevel@tonic-gate int optlen = uap->optlen; 10997c478bd9Sstevel@tonic-gate int remount; 11007c478bd9Sstevel@tonic-gate int rdonly; 11017c478bd9Sstevel@tonic-gate int nbmand = 0; 11027c478bd9Sstevel@tonic-gate int delmip = 0; 11037c478bd9Sstevel@tonic-gate int addmip = 0; 11047c478bd9Sstevel@tonic-gate int splice = ((uap->flags & MS_NOSPLICE) == 0); 11057c478bd9Sstevel@tonic-gate int fromspace = (uap->flags & MS_SYSSPACE) ? 1106b1b8ab34Slling UIO_SYSSPACE : UIO_USERSPACE; 11077c478bd9Sstevel@tonic-gate char *resource = NULL, *mountpt = NULL; 11087c478bd9Sstevel@tonic-gate refstr_t *oldresource, *oldmntpt; 11097c478bd9Sstevel@tonic-gate struct pathname pn, rpn; 111082c7f3c4Srsb vsk_anchor_t *vskap; 111193239addSjohnlev char fstname[FSTYPSZ]; 11125fd5c689SJerry Jelinek zone_t *zone; 11137c478bd9Sstevel@tonic-gate 11147c478bd9Sstevel@tonic-gate /* 11157c478bd9Sstevel@tonic-gate * The v_flag value for the mount point vp is permanently set 11167c478bd9Sstevel@tonic-gate * to VVFSLOCK so that no one bypasses the vn_vfs*locks routine 11177c478bd9Sstevel@tonic-gate * for mount point locking. 11187c478bd9Sstevel@tonic-gate */ 11197c478bd9Sstevel@tonic-gate mutex_enter(&vp->v_lock); 11207c478bd9Sstevel@tonic-gate vp->v_flag |= VVFSLOCK; 11217c478bd9Sstevel@tonic-gate mutex_exit(&vp->v_lock); 11227c478bd9Sstevel@tonic-gate 11237c478bd9Sstevel@tonic-gate mnt_mntopts.mo_count = 0; 11247c478bd9Sstevel@tonic-gate /* 11257c478bd9Sstevel@tonic-gate * Find the ops vector to use to invoke the file system-specific mount 11267c478bd9Sstevel@tonic-gate * method. If the fsname argument is non-NULL, use it directly. 11277c478bd9Sstevel@tonic-gate * Otherwise, dig the file system type information out of the mount 11287c478bd9Sstevel@tonic-gate * arguments. 11297c478bd9Sstevel@tonic-gate * 11307c478bd9Sstevel@tonic-gate * A side effect is to hold the vfssw entry. 11317c478bd9Sstevel@tonic-gate * 11327c478bd9Sstevel@tonic-gate * Mount arguments can be specified in several ways, which are 11337c478bd9Sstevel@tonic-gate * distinguished by flag bit settings. The preferred way is to set 11347c478bd9Sstevel@tonic-gate * MS_OPTIONSTR, indicating an 8 argument mount with the file system 11357c478bd9Sstevel@tonic-gate * type supplied as a character string and the last two arguments 11367c478bd9Sstevel@tonic-gate * being a pointer to a character buffer and the size of the buffer. 11377c478bd9Sstevel@tonic-gate * On entry, the buffer holds a null terminated list of options; on 11387c478bd9Sstevel@tonic-gate * return, the string is the list of options the file system 11397c478bd9Sstevel@tonic-gate * recognized. If MS_DATA is set arguments five and six point to a 11407c478bd9Sstevel@tonic-gate * block of binary data which the file system interprets. 11417c478bd9Sstevel@tonic-gate * A further wrinkle is that some callers don't set MS_FSS and MS_DATA 11427c478bd9Sstevel@tonic-gate * consistently with these conventions. To handle them, we check to 11437c478bd9Sstevel@tonic-gate * see whether the pointer to the file system name has a numeric value 11447c478bd9Sstevel@tonic-gate * less than 256. If so, we treat it as an index. 11457c478bd9Sstevel@tonic-gate */ 11467c478bd9Sstevel@tonic-gate if (fsname != NULL) { 11477c478bd9Sstevel@tonic-gate if ((vswp = vfs_getvfssw(fsname)) == NULL) { 11487c478bd9Sstevel@tonic-gate return (EINVAL); 11497c478bd9Sstevel@tonic-gate } 11507c478bd9Sstevel@tonic-gate } else if (uap->flags & (MS_OPTIONSTR | MS_DATA | MS_FSS)) { 11517c478bd9Sstevel@tonic-gate size_t n; 11527c478bd9Sstevel@tonic-gate uint_t fstype; 115393239addSjohnlev 115493239addSjohnlev fsname = fstname; 11557c478bd9Sstevel@tonic-gate 11567c478bd9Sstevel@tonic-gate if ((fstype = (uintptr_t)uap->fstype) < 256) { 11577c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 11587c478bd9Sstevel@tonic-gate if (fstype == 0 || fstype >= nfstype || 11597c478bd9Sstevel@tonic-gate !ALLOCATED_VFSSW(&vfssw[fstype])) { 11607c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 11617c478bd9Sstevel@tonic-gate return (EINVAL); 11627c478bd9Sstevel@tonic-gate } 116393239addSjohnlev (void) strcpy(fsname, vfssw[fstype].vsw_name); 11647c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 116593239addSjohnlev if ((vswp = vfs_getvfssw(fsname)) == NULL) 11667c478bd9Sstevel@tonic-gate return (EINVAL); 11677c478bd9Sstevel@tonic-gate } else { 11687c478bd9Sstevel@tonic-gate /* 11697c478bd9Sstevel@tonic-gate * Handle either kernel or user address space. 11707c478bd9Sstevel@tonic-gate */ 11717c478bd9Sstevel@tonic-gate if (uap->flags & MS_SYSSPACE) { 117293239addSjohnlev error = copystr(uap->fstype, fsname, 11737c478bd9Sstevel@tonic-gate FSTYPSZ, &n); 11747c478bd9Sstevel@tonic-gate } else { 117593239addSjohnlev error = copyinstr(uap->fstype, fsname, 11767c478bd9Sstevel@tonic-gate FSTYPSZ, &n); 11777c478bd9Sstevel@tonic-gate } 11787c478bd9Sstevel@tonic-gate if (error) { 11797c478bd9Sstevel@tonic-gate if (error == ENAMETOOLONG) 11807c478bd9Sstevel@tonic-gate return (EINVAL); 11817c478bd9Sstevel@tonic-gate return (error); 11827c478bd9Sstevel@tonic-gate } 118393239addSjohnlev if ((vswp = vfs_getvfssw(fsname)) == NULL) 11847c478bd9Sstevel@tonic-gate return (EINVAL); 11857c478bd9Sstevel@tonic-gate } 11867c478bd9Sstevel@tonic-gate } else { 11877c478bd9Sstevel@tonic-gate if ((vswp = vfs_getvfsswbyvfsops(vfs_getops(rootvfs))) == NULL) 11887c478bd9Sstevel@tonic-gate return (EINVAL); 11890fbb751dSJohn Levon fsname = vswp->vsw_name; 11907c478bd9Sstevel@tonic-gate } 11917c478bd9Sstevel@tonic-gate if (!VFS_INSTALLED(vswp)) 11927c478bd9Sstevel@tonic-gate return (EINVAL); 11930fbb751dSJohn Levon 11940fbb751dSJohn Levon if ((error = secpolicy_fs_allowed_mount(fsname)) != 0) { 11950fbb751dSJohn Levon vfs_unrefvfssw(vswp); 11960fbb751dSJohn Levon return (error); 11970fbb751dSJohn Levon } 11980fbb751dSJohn Levon 11997c478bd9Sstevel@tonic-gate vfsops = &vswp->vsw_vfsops; 12007c478bd9Sstevel@tonic-gate 12017c478bd9Sstevel@tonic-gate vfs_copyopttbl(&vswp->vsw_optproto, &mnt_mntopts); 12027c478bd9Sstevel@tonic-gate /* 12037c478bd9Sstevel@tonic-gate * Fetch mount options and parse them for generic vfs options 12047c478bd9Sstevel@tonic-gate */ 12057c478bd9Sstevel@tonic-gate if (uap->flags & MS_OPTIONSTR) { 12067c478bd9Sstevel@tonic-gate /* 12077c478bd9Sstevel@tonic-gate * Limit the buffer size 12087c478bd9Sstevel@tonic-gate */ 12097c478bd9Sstevel@tonic-gate if (optlen < 0 || optlen > MAX_MNTOPT_STR) { 12107c478bd9Sstevel@tonic-gate error = EINVAL; 12117c478bd9Sstevel@tonic-gate goto errout; 12127c478bd9Sstevel@tonic-gate } 12137c478bd9Sstevel@tonic-gate if ((uap->flags & MS_SYSSPACE) == 0) { 12147c478bd9Sstevel@tonic-gate inargs = kmem_alloc(MAX_MNTOPT_STR, KM_SLEEP); 12157c478bd9Sstevel@tonic-gate inargs[0] = '\0'; 12167c478bd9Sstevel@tonic-gate if (optlen) { 12177c478bd9Sstevel@tonic-gate error = copyinstr(opts, inargs, (size_t)optlen, 1218b1b8ab34Slling NULL); 12197c478bd9Sstevel@tonic-gate if (error) { 12207c478bd9Sstevel@tonic-gate goto errout; 12217c478bd9Sstevel@tonic-gate } 12227c478bd9Sstevel@tonic-gate } 12237c478bd9Sstevel@tonic-gate } 12247c478bd9Sstevel@tonic-gate vfs_parsemntopts(&mnt_mntopts, inargs, 0); 12257c478bd9Sstevel@tonic-gate } 12267c478bd9Sstevel@tonic-gate /* 12277c478bd9Sstevel@tonic-gate * Flag bits override the options string. 12287c478bd9Sstevel@tonic-gate */ 12297c478bd9Sstevel@tonic-gate if (uap->flags & MS_REMOUNT) 12307c478bd9Sstevel@tonic-gate vfs_setmntopt_nolock(&mnt_mntopts, MNTOPT_REMOUNT, NULL, 0, 0); 12317c478bd9Sstevel@tonic-gate if (uap->flags & MS_RDONLY) 12327c478bd9Sstevel@tonic-gate vfs_setmntopt_nolock(&mnt_mntopts, MNTOPT_RO, NULL, 0, 0); 12337c478bd9Sstevel@tonic-gate if (uap->flags & MS_NOSUID) 12347c478bd9Sstevel@tonic-gate vfs_setmntopt_nolock(&mnt_mntopts, MNTOPT_NOSUID, NULL, 0, 0); 12357c478bd9Sstevel@tonic-gate 12367c478bd9Sstevel@tonic-gate /* 12377c478bd9Sstevel@tonic-gate * Check if this is a remount; must be set in the option string and 12387c478bd9Sstevel@tonic-gate * the file system must support a remount option. 12397c478bd9Sstevel@tonic-gate */ 12407c478bd9Sstevel@tonic-gate if (remount = vfs_optionisset_nolock(&mnt_mntopts, 12417c478bd9Sstevel@tonic-gate MNTOPT_REMOUNT, NULL)) { 12427c478bd9Sstevel@tonic-gate if (!(vswp->vsw_flag & VSW_CANREMOUNT)) { 12437c478bd9Sstevel@tonic-gate error = ENOTSUP; 12447c478bd9Sstevel@tonic-gate goto errout; 12457c478bd9Sstevel@tonic-gate } 12467c478bd9Sstevel@tonic-gate uap->flags |= MS_REMOUNT; 12477c478bd9Sstevel@tonic-gate } 12487c478bd9Sstevel@tonic-gate 12497c478bd9Sstevel@tonic-gate /* 12507c478bd9Sstevel@tonic-gate * uap->flags and vfs_optionisset() should agree. 12517c478bd9Sstevel@tonic-gate */ 12527c478bd9Sstevel@tonic-gate if (rdonly = vfs_optionisset_nolock(&mnt_mntopts, MNTOPT_RO, NULL)) { 12537c478bd9Sstevel@tonic-gate uap->flags |= MS_RDONLY; 12547c478bd9Sstevel@tonic-gate } 12557c478bd9Sstevel@tonic-gate if (vfs_optionisset_nolock(&mnt_mntopts, MNTOPT_NOSUID, NULL)) { 12567c478bd9Sstevel@tonic-gate uap->flags |= MS_NOSUID; 12577c478bd9Sstevel@tonic-gate } 12587c478bd9Sstevel@tonic-gate nbmand = vfs_optionisset_nolock(&mnt_mntopts, MNTOPT_NBMAND, NULL); 12597c478bd9Sstevel@tonic-gate ASSERT(splice || !remount); 12607c478bd9Sstevel@tonic-gate /* 12617c478bd9Sstevel@tonic-gate * If we are splicing the fs into the namespace, 12627c478bd9Sstevel@tonic-gate * perform mount point checks. 12637c478bd9Sstevel@tonic-gate * 12647c478bd9Sstevel@tonic-gate * We want to resolve the path for the mount point to eliminate 12657c478bd9Sstevel@tonic-gate * '.' and ".." and symlinks in mount points; we can't do the 12667c478bd9Sstevel@tonic-gate * same for the resource string, since it would turn 12677c478bd9Sstevel@tonic-gate * "/dev/dsk/c0t0d0s0" into "/devices/pci@...". We need to do 12687c478bd9Sstevel@tonic-gate * this before grabbing vn_vfswlock(), because otherwise we 12697c478bd9Sstevel@tonic-gate * would deadlock with lookuppn(). 12707c478bd9Sstevel@tonic-gate */ 12717c478bd9Sstevel@tonic-gate if (splice) { 12727c478bd9Sstevel@tonic-gate ASSERT(vp->v_count > 0); 12737c478bd9Sstevel@tonic-gate 12747c478bd9Sstevel@tonic-gate /* 12757c478bd9Sstevel@tonic-gate * Pick up mount point and device from appropriate space. 12767c478bd9Sstevel@tonic-gate */ 12777c478bd9Sstevel@tonic-gate if (pn_get(uap->spec, fromspace, &pn) == 0) { 12787c478bd9Sstevel@tonic-gate resource = kmem_alloc(pn.pn_pathlen + 1, 12797c478bd9Sstevel@tonic-gate KM_SLEEP); 12807c478bd9Sstevel@tonic-gate (void) strcpy(resource, pn.pn_path); 12817c478bd9Sstevel@tonic-gate pn_free(&pn); 12827c478bd9Sstevel@tonic-gate } 12837c478bd9Sstevel@tonic-gate /* 12847c478bd9Sstevel@tonic-gate * Do a lookupname prior to taking the 12857c478bd9Sstevel@tonic-gate * writelock. Mark this as completed if 12867c478bd9Sstevel@tonic-gate * successful for later cleanup and addition to 12877c478bd9Sstevel@tonic-gate * the mount in progress table. 12887c478bd9Sstevel@tonic-gate */ 12897c478bd9Sstevel@tonic-gate if ((uap->flags & MS_GLOBAL) == 0 && 12907c478bd9Sstevel@tonic-gate lookupname(uap->spec, fromspace, 1291b1b8ab34Slling FOLLOW, NULL, &bvp) == 0) { 12927c478bd9Sstevel@tonic-gate addmip = 1; 12937c478bd9Sstevel@tonic-gate } 12947c478bd9Sstevel@tonic-gate 12957c478bd9Sstevel@tonic-gate if ((error = pn_get(uap->dir, fromspace, &pn)) == 0) { 12967c478bd9Sstevel@tonic-gate pathname_t *pnp; 12977c478bd9Sstevel@tonic-gate 12987c478bd9Sstevel@tonic-gate if (*pn.pn_path != '/') { 12997c478bd9Sstevel@tonic-gate error = EINVAL; 13007c478bd9Sstevel@tonic-gate pn_free(&pn); 13017c478bd9Sstevel@tonic-gate goto errout; 13027c478bd9Sstevel@tonic-gate } 13037c478bd9Sstevel@tonic-gate pn_alloc(&rpn); 13047c478bd9Sstevel@tonic-gate /* 13057c478bd9Sstevel@tonic-gate * Kludge to prevent autofs from deadlocking with 13067c478bd9Sstevel@tonic-gate * itself when it calls domount(). 13077c478bd9Sstevel@tonic-gate * 13087c478bd9Sstevel@tonic-gate * If autofs is calling, it is because it is doing 13097c478bd9Sstevel@tonic-gate * (autofs) mounts in the process of an NFS mount. A 13107c478bd9Sstevel@tonic-gate * lookuppn() here would cause us to block waiting for 13117c478bd9Sstevel@tonic-gate * said NFS mount to complete, which can't since this 13127c478bd9Sstevel@tonic-gate * is the thread that was supposed to doing it. 13137c478bd9Sstevel@tonic-gate */ 13147c478bd9Sstevel@tonic-gate if (fromspace == UIO_USERSPACE) { 13157c478bd9Sstevel@tonic-gate if ((error = lookuppn(&pn, &rpn, FOLLOW, NULL, 13167c478bd9Sstevel@tonic-gate NULL)) == 0) { 13177c478bd9Sstevel@tonic-gate pnp = &rpn; 13187c478bd9Sstevel@tonic-gate } else { 13197c478bd9Sstevel@tonic-gate /* 13207c478bd9Sstevel@tonic-gate * The file disappeared or otherwise 13217c478bd9Sstevel@tonic-gate * became inaccessible since we opened 13227c478bd9Sstevel@tonic-gate * it; might as well fail the mount 13237c478bd9Sstevel@tonic-gate * since the mount point is no longer 13247c478bd9Sstevel@tonic-gate * accessible. 13257c478bd9Sstevel@tonic-gate */ 13267c478bd9Sstevel@tonic-gate pn_free(&rpn); 13277c478bd9Sstevel@tonic-gate pn_free(&pn); 13287c478bd9Sstevel@tonic-gate goto errout; 13297c478bd9Sstevel@tonic-gate } 13307c478bd9Sstevel@tonic-gate } else { 13317c478bd9Sstevel@tonic-gate pnp = &pn; 13327c478bd9Sstevel@tonic-gate } 13337c478bd9Sstevel@tonic-gate mountpt = kmem_alloc(pnp->pn_pathlen + 1, KM_SLEEP); 13347c478bd9Sstevel@tonic-gate (void) strcpy(mountpt, pnp->pn_path); 13357c478bd9Sstevel@tonic-gate 13367c478bd9Sstevel@tonic-gate /* 13377c478bd9Sstevel@tonic-gate * If the addition of the zone's rootpath 13387c478bd9Sstevel@tonic-gate * would push us over a total path length 13397c478bd9Sstevel@tonic-gate * of MAXPATHLEN, we fail the mount with 13407c478bd9Sstevel@tonic-gate * ENAMETOOLONG, which is what we would have 13417c478bd9Sstevel@tonic-gate * gotten if we were trying to perform the same 13427c478bd9Sstevel@tonic-gate * mount in the global zone. 13437c478bd9Sstevel@tonic-gate * 13447c478bd9Sstevel@tonic-gate * strlen() doesn't count the trailing 13457c478bd9Sstevel@tonic-gate * '\0', but zone_rootpathlen counts both a 13467c478bd9Sstevel@tonic-gate * trailing '/' and the terminating '\0'. 13477c478bd9Sstevel@tonic-gate */ 13487c478bd9Sstevel@tonic-gate if ((curproc->p_zone->zone_rootpathlen - 1 + 13497c478bd9Sstevel@tonic-gate strlen(mountpt)) > MAXPATHLEN || 13507c478bd9Sstevel@tonic-gate (resource != NULL && 13517c478bd9Sstevel@tonic-gate (curproc->p_zone->zone_rootpathlen - 1 + 13527c478bd9Sstevel@tonic-gate strlen(resource)) > MAXPATHLEN)) { 13537c478bd9Sstevel@tonic-gate error = ENAMETOOLONG; 13547c478bd9Sstevel@tonic-gate } 13557c478bd9Sstevel@tonic-gate 13567c478bd9Sstevel@tonic-gate pn_free(&rpn); 13577c478bd9Sstevel@tonic-gate pn_free(&pn); 13587c478bd9Sstevel@tonic-gate } 13597c478bd9Sstevel@tonic-gate 13607c478bd9Sstevel@tonic-gate if (error) 13617c478bd9Sstevel@tonic-gate goto errout; 13627c478bd9Sstevel@tonic-gate 13637c478bd9Sstevel@tonic-gate /* 13647c478bd9Sstevel@tonic-gate * Prevent path name resolution from proceeding past 13657c478bd9Sstevel@tonic-gate * the mount point. 13667c478bd9Sstevel@tonic-gate */ 13677c478bd9Sstevel@tonic-gate if (vn_vfswlock(vp) != 0) { 13687c478bd9Sstevel@tonic-gate error = EBUSY; 13697c478bd9Sstevel@tonic-gate goto errout; 13707c478bd9Sstevel@tonic-gate } 13717c478bd9Sstevel@tonic-gate 13727c478bd9Sstevel@tonic-gate /* 13737c478bd9Sstevel@tonic-gate * Verify that it's legitimate to establish a mount on 13747c478bd9Sstevel@tonic-gate * the prospective mount point. 13757c478bd9Sstevel@tonic-gate */ 13767c478bd9Sstevel@tonic-gate if (vn_mountedvfs(vp) != NULL) { 13777c478bd9Sstevel@tonic-gate /* 13787c478bd9Sstevel@tonic-gate * The mount point lock was obtained after some 13797c478bd9Sstevel@tonic-gate * other thread raced through and established a mount. 13807c478bd9Sstevel@tonic-gate */ 13817c478bd9Sstevel@tonic-gate vn_vfsunlock(vp); 13827c478bd9Sstevel@tonic-gate error = EBUSY; 13837c478bd9Sstevel@tonic-gate goto errout; 13847c478bd9Sstevel@tonic-gate } 13857c478bd9Sstevel@tonic-gate if (vp->v_flag & VNOMOUNT) { 13867c478bd9Sstevel@tonic-gate vn_vfsunlock(vp); 13877c478bd9Sstevel@tonic-gate error = EINVAL; 13887c478bd9Sstevel@tonic-gate goto errout; 13897c478bd9Sstevel@tonic-gate } 13907c478bd9Sstevel@tonic-gate } 13917c478bd9Sstevel@tonic-gate if ((uap->flags & (MS_DATA | MS_OPTIONSTR)) == 0) { 13927c478bd9Sstevel@tonic-gate uap->dataptr = NULL; 13937c478bd9Sstevel@tonic-gate uap->datalen = 0; 13947c478bd9Sstevel@tonic-gate } 13957c478bd9Sstevel@tonic-gate 13967c478bd9Sstevel@tonic-gate /* 13977c478bd9Sstevel@tonic-gate * If this is a remount, we don't want to create a new VFS. 13987c478bd9Sstevel@tonic-gate * Instead, we pass the existing one with a remount flag. 13997c478bd9Sstevel@tonic-gate */ 14007c478bd9Sstevel@tonic-gate if (remount) { 14017c478bd9Sstevel@tonic-gate /* 14027c478bd9Sstevel@tonic-gate * Confirm that the mount point is the root vnode of the 14037c478bd9Sstevel@tonic-gate * file system that is being remounted. 14047c478bd9Sstevel@tonic-gate * This can happen if the user specifies a different 14057c478bd9Sstevel@tonic-gate * mount point directory pathname in the (re)mount command. 14067c478bd9Sstevel@tonic-gate * 14077c478bd9Sstevel@tonic-gate * Code below can only be reached if splice is true, so it's 14087c478bd9Sstevel@tonic-gate * safe to do vn_vfsunlock() here. 14097c478bd9Sstevel@tonic-gate */ 14107c478bd9Sstevel@tonic-gate if ((vp->v_flag & VROOT) == 0) { 14117c478bd9Sstevel@tonic-gate vn_vfsunlock(vp); 14127c478bd9Sstevel@tonic-gate error = ENOENT; 14137c478bd9Sstevel@tonic-gate goto errout; 14147c478bd9Sstevel@tonic-gate } 14157c478bd9Sstevel@tonic-gate /* 14167c478bd9Sstevel@tonic-gate * Disallow making file systems read-only unless file system 14177c478bd9Sstevel@tonic-gate * explicitly allows it in its vfssw. Ignore other flags. 14187c478bd9Sstevel@tonic-gate */ 14197c478bd9Sstevel@tonic-gate if (rdonly && vn_is_readonly(vp) == 0 && 14207c478bd9Sstevel@tonic-gate (vswp->vsw_flag & VSW_CANRWRO) == 0) { 14217c478bd9Sstevel@tonic-gate vn_vfsunlock(vp); 14227c478bd9Sstevel@tonic-gate error = EINVAL; 14237c478bd9Sstevel@tonic-gate goto errout; 14247c478bd9Sstevel@tonic-gate } 14257c478bd9Sstevel@tonic-gate /* 1426da6c28aaSamw * Disallow changing the NBMAND disposition of the file 1427da6c28aaSamw * system on remounts. 14287c478bd9Sstevel@tonic-gate */ 14297c478bd9Sstevel@tonic-gate if ((nbmand && ((vp->v_vfsp->vfs_flag & VFS_NBMAND) == 0)) || 14307c478bd9Sstevel@tonic-gate (!nbmand && (vp->v_vfsp->vfs_flag & VFS_NBMAND))) { 1431da6c28aaSamw vn_vfsunlock(vp); 1432da6c28aaSamw error = EINVAL; 1433da6c28aaSamw goto errout; 14347c478bd9Sstevel@tonic-gate } 14357c478bd9Sstevel@tonic-gate vfsp = vp->v_vfsp; 14367c478bd9Sstevel@tonic-gate ovflags = vfsp->vfs_flag; 14377c478bd9Sstevel@tonic-gate vfsp->vfs_flag |= VFS_REMOUNT; 14387c478bd9Sstevel@tonic-gate vfsp->vfs_flag &= ~VFS_RDONLY; 14397c478bd9Sstevel@tonic-gate } else { 1440da6c28aaSamw vfsp = vfs_alloc(KM_SLEEP); 14417c478bd9Sstevel@tonic-gate VFS_INIT(vfsp, vfsops, NULL); 14427c478bd9Sstevel@tonic-gate } 14437c478bd9Sstevel@tonic-gate 14447c478bd9Sstevel@tonic-gate VFS_HOLD(vfsp); 14457c478bd9Sstevel@tonic-gate 144693239addSjohnlev if ((error = lofi_add(fsname, vfsp, &mnt_mntopts, uap)) != 0) { 144793239addSjohnlev if (!remount) { 144893239addSjohnlev if (splice) 144993239addSjohnlev vn_vfsunlock(vp); 145093239addSjohnlev vfs_free(vfsp); 145193239addSjohnlev } else { 145293239addSjohnlev vn_vfsunlock(vp); 145393239addSjohnlev VFS_RELE(vfsp); 145493239addSjohnlev } 145593239addSjohnlev goto errout; 145693239addSjohnlev } 145793239addSjohnlev 145893239addSjohnlev /* 145993239addSjohnlev * PRIV_SYS_MOUNT doesn't mean you can become root. 146093239addSjohnlev */ 1461406fc510SToomas Soome if (vfsp->vfs_lofi_id != 0) { 146293239addSjohnlev uap->flags |= MS_NOSUID; 146393239addSjohnlev vfs_setmntopt_nolock(&mnt_mntopts, MNTOPT_NOSUID, NULL, 0, 0); 146493239addSjohnlev } 146593239addSjohnlev 14667c478bd9Sstevel@tonic-gate /* 14677c478bd9Sstevel@tonic-gate * The vfs_reflock is not used anymore the code below explicitly 14687c478bd9Sstevel@tonic-gate * holds it preventing others accesing it directly. 14697c478bd9Sstevel@tonic-gate */ 14707c478bd9Sstevel@tonic-gate if ((sema_tryp(&vfsp->vfs_reflock) == 0) && 14717c478bd9Sstevel@tonic-gate !(vfsp->vfs_flag & VFS_REMOUNT)) 14727c478bd9Sstevel@tonic-gate cmn_err(CE_WARN, 1473ae115bc7Smrj "mount type %s couldn't get vfs_reflock", vswp->vsw_name); 14747c478bd9Sstevel@tonic-gate 14757c478bd9Sstevel@tonic-gate /* 14767c478bd9Sstevel@tonic-gate * Lock the vfs. If this is a remount we want to avoid spurious umount 14777c478bd9Sstevel@tonic-gate * failures that happen as a side-effect of fsflush() and other mount 14787c478bd9Sstevel@tonic-gate * and unmount operations that might be going on simultaneously and 14797c478bd9Sstevel@tonic-gate * may have locked the vfs currently. To not return EBUSY immediately 14807c478bd9Sstevel@tonic-gate * here we use vfs_lock_wait() instead vfs_lock() for the remount case. 14817c478bd9Sstevel@tonic-gate */ 14827c478bd9Sstevel@tonic-gate if (!remount) { 14837c478bd9Sstevel@tonic-gate if (error = vfs_lock(vfsp)) { 14847c478bd9Sstevel@tonic-gate vfsp->vfs_flag = ovflags; 148593239addSjohnlev 148693239addSjohnlev lofi_remove(vfsp); 148793239addSjohnlev 14887c478bd9Sstevel@tonic-gate if (splice) 14897c478bd9Sstevel@tonic-gate vn_vfsunlock(vp); 1490da6c28aaSamw vfs_free(vfsp); 14917c478bd9Sstevel@tonic-gate goto errout; 14927c478bd9Sstevel@tonic-gate } 14937c478bd9Sstevel@tonic-gate } else { 14947c478bd9Sstevel@tonic-gate vfs_lock_wait(vfsp); 14957c478bd9Sstevel@tonic-gate } 14967c478bd9Sstevel@tonic-gate 14977c478bd9Sstevel@tonic-gate /* 14987c478bd9Sstevel@tonic-gate * Add device to mount in progress table, global mounts require special 14997c478bd9Sstevel@tonic-gate * handling. It is possible that we have already done the lookupname 15007c478bd9Sstevel@tonic-gate * on a spliced, non-global fs. If so, we don't want to do it again 15017c478bd9Sstevel@tonic-gate * since we cannot do a lookupname after taking the 15027c478bd9Sstevel@tonic-gate * wlock above. This case is for a non-spliced, non-global filesystem. 15037c478bd9Sstevel@tonic-gate */ 15047c478bd9Sstevel@tonic-gate if (!addmip) { 1505b1b8ab34Slling if ((uap->flags & MS_GLOBAL) == 0 && 1506b1b8ab34Slling lookupname(uap->spec, fromspace, FOLLOW, NULL, &bvp) == 0) { 15077c478bd9Sstevel@tonic-gate addmip = 1; 15087c478bd9Sstevel@tonic-gate } 15097c478bd9Sstevel@tonic-gate } 15107c478bd9Sstevel@tonic-gate 15117c478bd9Sstevel@tonic-gate if (addmip) { 151293239addSjohnlev vnode_t *lvp = NULL; 151393239addSjohnlev 151493239addSjohnlev error = vfs_get_lofi(vfsp, &lvp); 151593239addSjohnlev if (error > 0) { 151693239addSjohnlev lofi_remove(vfsp); 151793239addSjohnlev 151893239addSjohnlev if (splice) 151993239addSjohnlev vn_vfsunlock(vp); 152093239addSjohnlev vfs_unlock(vfsp); 152193239addSjohnlev 152293239addSjohnlev if (remount) { 152393239addSjohnlev VFS_RELE(vfsp); 152493239addSjohnlev } else { 152593239addSjohnlev vfs_free(vfsp); 152693239addSjohnlev } 152793239addSjohnlev 152893239addSjohnlev goto errout; 152993239addSjohnlev } else if (error == -1) { 153093239addSjohnlev bdev = bvp->v_rdev; 153193239addSjohnlev VN_RELE(bvp); 153293239addSjohnlev } else { 153393239addSjohnlev bdev = lvp->v_rdev; 153493239addSjohnlev VN_RELE(lvp); 153593239addSjohnlev VN_RELE(bvp); 153693239addSjohnlev } 153793239addSjohnlev 15387c478bd9Sstevel@tonic-gate vfs_addmip(bdev, vfsp); 15397c478bd9Sstevel@tonic-gate addmip = 0; 15407c478bd9Sstevel@tonic-gate delmip = 1; 15417c478bd9Sstevel@tonic-gate } 15427c478bd9Sstevel@tonic-gate /* 15437c478bd9Sstevel@tonic-gate * Invalidate cached entry for the mount point. 15447c478bd9Sstevel@tonic-gate */ 15457c478bd9Sstevel@tonic-gate if (splice) 15467c478bd9Sstevel@tonic-gate dnlc_purge_vp(vp); 15477c478bd9Sstevel@tonic-gate 15487c478bd9Sstevel@tonic-gate /* 15497c478bd9Sstevel@tonic-gate * If have an option string but the filesystem doesn't supply a 15507c478bd9Sstevel@tonic-gate * prototype options table, create a table with the global 15517c478bd9Sstevel@tonic-gate * options and sufficient room to accept all the options in the 15527c478bd9Sstevel@tonic-gate * string. Then parse the passed in option string 15537c478bd9Sstevel@tonic-gate * accepting all the options in the string. This gives us an 15547c478bd9Sstevel@tonic-gate * option table with all the proper cancel properties for the 15557c478bd9Sstevel@tonic-gate * global options. 15567c478bd9Sstevel@tonic-gate * 15577c478bd9Sstevel@tonic-gate * Filesystems that supply a prototype options table are handled 15587c478bd9Sstevel@tonic-gate * earlier in this function. 15597c478bd9Sstevel@tonic-gate */ 15607c478bd9Sstevel@tonic-gate if (uap->flags & MS_OPTIONSTR) { 15617c478bd9Sstevel@tonic-gate if (!(vswp->vsw_flag & VSW_HASPROTO)) { 15627c478bd9Sstevel@tonic-gate mntopts_t tmp_mntopts; 15637c478bd9Sstevel@tonic-gate 15647c478bd9Sstevel@tonic-gate tmp_mntopts.mo_count = 0; 15657c478bd9Sstevel@tonic-gate vfs_createopttbl_extend(&tmp_mntopts, inargs, 15667c478bd9Sstevel@tonic-gate &mnt_mntopts); 15677c478bd9Sstevel@tonic-gate vfs_parsemntopts(&tmp_mntopts, inargs, 1); 15687c478bd9Sstevel@tonic-gate vfs_swapopttbl_nolock(&mnt_mntopts, &tmp_mntopts); 15697c478bd9Sstevel@tonic-gate vfs_freeopttbl(&tmp_mntopts); 15707c478bd9Sstevel@tonic-gate } 15717c478bd9Sstevel@tonic-gate } 15727c478bd9Sstevel@tonic-gate 15737c478bd9Sstevel@tonic-gate /* 15745fd5c689SJerry Jelinek * Serialize with zone state transitions. 15755fd5c689SJerry Jelinek * See vfs_list_add; zone mounted into is: 15765fd5c689SJerry Jelinek * zone_find_by_path(refstr_value(vfsp->vfs_mntpt)) 15775fd5c689SJerry Jelinek * not the zone doing the mount (curproc->p_zone), but if we're already 15785fd5c689SJerry Jelinek * inside a NGZ, then we know what zone we are. 15797c478bd9Sstevel@tonic-gate */ 15805fd5c689SJerry Jelinek if (INGLOBALZONE(curproc)) { 15815fd5c689SJerry Jelinek zone = zone_find_by_path(mountpt); 15825fd5c689SJerry Jelinek ASSERT(zone != NULL); 15835fd5c689SJerry Jelinek } else { 15845fd5c689SJerry Jelinek zone = curproc->p_zone; 15855fd5c689SJerry Jelinek /* 15865fd5c689SJerry Jelinek * zone_find_by_path does a hold, so do one here too so that 15875fd5c689SJerry Jelinek * we can do a zone_rele after mount_completed. 15885fd5c689SJerry Jelinek */ 15895fd5c689SJerry Jelinek zone_hold(zone); 15905fd5c689SJerry Jelinek } 15915fd5c689SJerry Jelinek mount_in_progress(zone); 15927c478bd9Sstevel@tonic-gate /* 15937c478bd9Sstevel@tonic-gate * Instantiate (or reinstantiate) the file system. If appropriate, 15947c478bd9Sstevel@tonic-gate * splice it into the file system name space. 15957c478bd9Sstevel@tonic-gate * 15967c478bd9Sstevel@tonic-gate * We want VFS_MOUNT() to be able to override the vfs_resource 15977c478bd9Sstevel@tonic-gate * string if necessary (ie, mntfs), and also for a remount to 15987c478bd9Sstevel@tonic-gate * change the same (necessary when remounting '/' during boot). 15997c478bd9Sstevel@tonic-gate * So we set up vfs_mntpt and vfs_resource to what we think they 16007c478bd9Sstevel@tonic-gate * should be, then hand off control to VFS_MOUNT() which can 16017c478bd9Sstevel@tonic-gate * override this. 16027c478bd9Sstevel@tonic-gate * 16037c478bd9Sstevel@tonic-gate * For safety's sake, when changing vfs_resource or vfs_mntpt of 16047c478bd9Sstevel@tonic-gate * a vfs which is on the vfs list (i.e. during a remount), we must 16057c478bd9Sstevel@tonic-gate * never set those fields to NULL. Several bits of code make 16067c478bd9Sstevel@tonic-gate * assumptions that the fields are always valid. 16077c478bd9Sstevel@tonic-gate */ 16087c478bd9Sstevel@tonic-gate vfs_swapopttbl(&mnt_mntopts, &vfsp->vfs_mntopts); 16097c478bd9Sstevel@tonic-gate if (remount) { 16107c478bd9Sstevel@tonic-gate if ((oldresource = vfsp->vfs_resource) != NULL) 16117c478bd9Sstevel@tonic-gate refstr_hold(oldresource); 16127c478bd9Sstevel@tonic-gate if ((oldmntpt = vfsp->vfs_mntpt) != NULL) 16137c478bd9Sstevel@tonic-gate refstr_hold(oldmntpt); 16147c478bd9Sstevel@tonic-gate } 1615d7de0ceaSRobert Harris vfs_setresource(vfsp, resource, 0); 1616d7de0ceaSRobert Harris vfs_setmntpoint(vfsp, mountpt, 0); 16177c478bd9Sstevel@tonic-gate 1618df2381bfSpraks /* 1619df2381bfSpraks * going to mount on this vnode, so notify. 1620df2381bfSpraks */ 1621da6c28aaSamw vnevent_mountedover(vp, NULL); 16227c478bd9Sstevel@tonic-gate error = VFS_MOUNT(vfsp, vp, uap, credp); 16237c478bd9Sstevel@tonic-gate 16247c478bd9Sstevel@tonic-gate if (uap->flags & MS_RDONLY) 16257c478bd9Sstevel@tonic-gate vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0); 16267c478bd9Sstevel@tonic-gate if (uap->flags & MS_NOSUID) 16277c478bd9Sstevel@tonic-gate vfs_setmntopt(vfsp, MNTOPT_NOSUID, NULL, 0); 16287c478bd9Sstevel@tonic-gate if (uap->flags & MS_GLOBAL) 16297c478bd9Sstevel@tonic-gate vfs_setmntopt(vfsp, MNTOPT_GLOBAL, NULL, 0); 16307c478bd9Sstevel@tonic-gate 16317c478bd9Sstevel@tonic-gate if (error) { 163293239addSjohnlev lofi_remove(vfsp); 163393239addSjohnlev 16347c478bd9Sstevel@tonic-gate if (remount) { 16357c478bd9Sstevel@tonic-gate /* put back pre-remount options */ 16367c478bd9Sstevel@tonic-gate vfs_swapopttbl(&mnt_mntopts, &vfsp->vfs_mntopts); 1637d7de0ceaSRobert Harris vfs_setmntpoint(vfsp, refstr_value(oldmntpt), 1638d7de0ceaSRobert Harris VFSSP_VERBATIM); 16397c478bd9Sstevel@tonic-gate if (oldmntpt) 16407c478bd9Sstevel@tonic-gate refstr_rele(oldmntpt); 1641d7de0ceaSRobert Harris vfs_setresource(vfsp, refstr_value(oldresource), 1642d7de0ceaSRobert Harris VFSSP_VERBATIM); 16437c478bd9Sstevel@tonic-gate if (oldresource) 16447c478bd9Sstevel@tonic-gate refstr_rele(oldresource); 16457c478bd9Sstevel@tonic-gate vfsp->vfs_flag = ovflags; 16467c478bd9Sstevel@tonic-gate vfs_unlock(vfsp); 16477c478bd9Sstevel@tonic-gate VFS_RELE(vfsp); 16487c478bd9Sstevel@tonic-gate } else { 16497c478bd9Sstevel@tonic-gate vfs_unlock(vfsp); 16507c478bd9Sstevel@tonic-gate vfs_freemnttab(vfsp); 1651da6c28aaSamw vfs_free(vfsp); 16527c478bd9Sstevel@tonic-gate } 16537c478bd9Sstevel@tonic-gate } else { 16547c478bd9Sstevel@tonic-gate /* 16557c478bd9Sstevel@tonic-gate * Set the mount time to now 16567c478bd9Sstevel@tonic-gate */ 16577c478bd9Sstevel@tonic-gate vfsp->vfs_mtime = ddi_get_time(); 16587c478bd9Sstevel@tonic-gate if (remount) { 16597c478bd9Sstevel@tonic-gate vfsp->vfs_flag &= ~VFS_REMOUNT; 16607c478bd9Sstevel@tonic-gate if (oldresource) 16617c478bd9Sstevel@tonic-gate refstr_rele(oldresource); 16627c478bd9Sstevel@tonic-gate if (oldmntpt) 16637c478bd9Sstevel@tonic-gate refstr_rele(oldmntpt); 16647c478bd9Sstevel@tonic-gate } else if (splice) { 16657c478bd9Sstevel@tonic-gate /* 16667c478bd9Sstevel@tonic-gate * Link vfsp into the name space at the mount 16677c478bd9Sstevel@tonic-gate * point. Vfs_add() is responsible for 16687c478bd9Sstevel@tonic-gate * holding the mount point which will be 16697c478bd9Sstevel@tonic-gate * released when vfs_remove() is called. 16707c478bd9Sstevel@tonic-gate */ 16717c478bd9Sstevel@tonic-gate vfs_add(vp, vfsp, uap->flags); 16727c478bd9Sstevel@tonic-gate } else { 16737c478bd9Sstevel@tonic-gate /* 16747c478bd9Sstevel@tonic-gate * Hold the reference to file system which is 16757c478bd9Sstevel@tonic-gate * not linked into the name space. 16767c478bd9Sstevel@tonic-gate */ 16777c478bd9Sstevel@tonic-gate vfsp->vfs_zone = NULL; 16787c478bd9Sstevel@tonic-gate VFS_HOLD(vfsp); 16797c478bd9Sstevel@tonic-gate vfsp->vfs_vnodecovered = NULL; 16807c478bd9Sstevel@tonic-gate } 16817c478bd9Sstevel@tonic-gate /* 16827c478bd9Sstevel@tonic-gate * Set flags for global options encountered 16837c478bd9Sstevel@tonic-gate */ 16847c478bd9Sstevel@tonic-gate if (vfs_optionisset(vfsp, MNTOPT_RO, NULL)) 16857c478bd9Sstevel@tonic-gate vfsp->vfs_flag |= VFS_RDONLY; 16867c478bd9Sstevel@tonic-gate else 16877c478bd9Sstevel@tonic-gate vfsp->vfs_flag &= ~VFS_RDONLY; 16887c478bd9Sstevel@tonic-gate if (vfs_optionisset(vfsp, MNTOPT_NOSUID, NULL)) { 16897c478bd9Sstevel@tonic-gate vfsp->vfs_flag |= (VFS_NOSETUID|VFS_NODEVICES); 16907c478bd9Sstevel@tonic-gate } else { 16917c478bd9Sstevel@tonic-gate if (vfs_optionisset(vfsp, MNTOPT_NODEVICES, NULL)) 16927c478bd9Sstevel@tonic-gate vfsp->vfs_flag |= VFS_NODEVICES; 16937c478bd9Sstevel@tonic-gate else 16947c478bd9Sstevel@tonic-gate vfsp->vfs_flag &= ~VFS_NODEVICES; 16957c478bd9Sstevel@tonic-gate if (vfs_optionisset(vfsp, MNTOPT_NOSETUID, NULL)) 16967c478bd9Sstevel@tonic-gate vfsp->vfs_flag |= VFS_NOSETUID; 16977c478bd9Sstevel@tonic-gate else 16987c478bd9Sstevel@tonic-gate vfsp->vfs_flag &= ~VFS_NOSETUID; 16997c478bd9Sstevel@tonic-gate } 17007c478bd9Sstevel@tonic-gate if (vfs_optionisset(vfsp, MNTOPT_NBMAND, NULL)) 17017c478bd9Sstevel@tonic-gate vfsp->vfs_flag |= VFS_NBMAND; 17027c478bd9Sstevel@tonic-gate else 17037c478bd9Sstevel@tonic-gate vfsp->vfs_flag &= ~VFS_NBMAND; 17047c478bd9Sstevel@tonic-gate 17057c478bd9Sstevel@tonic-gate if (vfs_optionisset(vfsp, MNTOPT_XATTR, NULL)) 17067c478bd9Sstevel@tonic-gate vfsp->vfs_flag |= VFS_XATTR; 17077c478bd9Sstevel@tonic-gate else 17087c478bd9Sstevel@tonic-gate vfsp->vfs_flag &= ~VFS_XATTR; 17097c478bd9Sstevel@tonic-gate 17107c478bd9Sstevel@tonic-gate if (vfs_optionisset(vfsp, MNTOPT_NOEXEC, NULL)) 17117c478bd9Sstevel@tonic-gate vfsp->vfs_flag |= VFS_NOEXEC; 17127c478bd9Sstevel@tonic-gate else 17137c478bd9Sstevel@tonic-gate vfsp->vfs_flag &= ~VFS_NOEXEC; 17147c478bd9Sstevel@tonic-gate 17157c478bd9Sstevel@tonic-gate /* 17167c478bd9Sstevel@tonic-gate * Now construct the output option string of options 17177c478bd9Sstevel@tonic-gate * we recognized. 17187c478bd9Sstevel@tonic-gate */ 17197c478bd9Sstevel@tonic-gate if (uap->flags & MS_OPTIONSTR) { 17207c478bd9Sstevel@tonic-gate vfs_list_read_lock(); 17217c478bd9Sstevel@tonic-gate copyout_error = vfs_buildoptionstr( 1722b1b8ab34Slling &vfsp->vfs_mntopts, inargs, optlen); 17237c478bd9Sstevel@tonic-gate vfs_list_unlock(); 17247c478bd9Sstevel@tonic-gate if (copyout_error == 0 && 17257c478bd9Sstevel@tonic-gate (uap->flags & MS_SYSSPACE) == 0) { 17267c478bd9Sstevel@tonic-gate copyout_error = copyoutstr(inargs, opts, 17277c478bd9Sstevel@tonic-gate optlen, NULL); 17287c478bd9Sstevel@tonic-gate } 17297c478bd9Sstevel@tonic-gate } 17305a59a8b3Srsb 173182c7f3c4Srsb /* 173282c7f3c4Srsb * If this isn't a remount, set up the vopstats before 1733ec64bf9dSrsb * anyone can touch this. We only allow spliced file 1734ec64bf9dSrsb * systems (file systems which are in the namespace) to 1735ec64bf9dSrsb * have the VFS_STATS flag set. 1736ec64bf9dSrsb * NOTE: PxFS mounts the underlying file system with 1737ec64bf9dSrsb * MS_NOSPLICE set and copies those vfs_flags to its private 1738ec64bf9dSrsb * vfs structure. As a result, PxFS should never have 1739ec64bf9dSrsb * the VFS_STATS flag or else we might access the vfs 1740ec64bf9dSrsb * statistics-related fields prior to them being 1741ec64bf9dSrsb * properly initialized. 174282c7f3c4Srsb */ 1743ec64bf9dSrsb if (!remount && (vswp->vsw_flag & VSW_STATS) && splice) { 174482c7f3c4Srsb initialize_vopstats(&vfsp->vfs_vopstats); 174582c7f3c4Srsb /* 174682c7f3c4Srsb * We need to set vfs_vskap to NULL because there's 174782c7f3c4Srsb * a chance it won't be set below. This is checked 174882c7f3c4Srsb * in teardown_vopstats() so we can't have garbage. 174982c7f3c4Srsb */ 175082c7f3c4Srsb vfsp->vfs_vskap = NULL; 17515a59a8b3Srsb vfsp->vfs_flag |= VFS_STATS; 175282c7f3c4Srsb vfsp->vfs_fstypevsp = get_fstype_vopstats(vfsp, vswp); 17535a59a8b3Srsb } 17545a59a8b3Srsb 1755f48205beScasper if (vswp->vsw_flag & VSW_XID) 1756f48205beScasper vfsp->vfs_flag |= VFS_XID; 1757f48205beScasper 17587c478bd9Sstevel@tonic-gate vfs_unlock(vfsp); 17597c478bd9Sstevel@tonic-gate } 17605fd5c689SJerry Jelinek mount_completed(zone); 17615fd5c689SJerry Jelinek zone_rele(zone); 17627c478bd9Sstevel@tonic-gate if (splice) 17637c478bd9Sstevel@tonic-gate vn_vfsunlock(vp); 17647c478bd9Sstevel@tonic-gate 17657c478bd9Sstevel@tonic-gate if ((error == 0) && (copyout_error == 0)) { 176682c7f3c4Srsb if (!remount) { 176782c7f3c4Srsb /* 176882c7f3c4Srsb * Don't call get_vskstat_anchor() while holding 176982c7f3c4Srsb * locks since it allocates memory and calls 177082c7f3c4Srsb * VFS_STATVFS(). For NFS, the latter can generate 177182c7f3c4Srsb * an over-the-wire call. 177282c7f3c4Srsb */ 177382c7f3c4Srsb vskap = get_vskstat_anchor(vfsp); 177482c7f3c4Srsb /* Only take the lock if we have something to do */ 177582c7f3c4Srsb if (vskap != NULL) { 177682c7f3c4Srsb vfs_lock_wait(vfsp); 177782c7f3c4Srsb if (vfsp->vfs_flag & VFS_STATS) { 177882c7f3c4Srsb vfsp->vfs_vskap = vskap; 177982c7f3c4Srsb } 178082c7f3c4Srsb vfs_unlock(vfsp); 178182c7f3c4Srsb } 178282c7f3c4Srsb } 17835a59a8b3Srsb /* Return vfsp to caller. */ 17847c478bd9Sstevel@tonic-gate *vfspp = vfsp; 17857c478bd9Sstevel@tonic-gate } 17867c478bd9Sstevel@tonic-gate errout: 17877c478bd9Sstevel@tonic-gate vfs_freeopttbl(&mnt_mntopts); 17887c478bd9Sstevel@tonic-gate if (resource != NULL) 17897c478bd9Sstevel@tonic-gate kmem_free(resource, strlen(resource) + 1); 17907c478bd9Sstevel@tonic-gate if (mountpt != NULL) 17917c478bd9Sstevel@tonic-gate kmem_free(mountpt, strlen(mountpt) + 1); 17927c478bd9Sstevel@tonic-gate /* 17937c478bd9Sstevel@tonic-gate * It is possible we errored prior to adding to mount in progress 17947c478bd9Sstevel@tonic-gate * table. Must free vnode we acquired with successful lookupname. 17957c478bd9Sstevel@tonic-gate */ 17967c478bd9Sstevel@tonic-gate if (addmip) 17977c478bd9Sstevel@tonic-gate VN_RELE(bvp); 17987c478bd9Sstevel@tonic-gate if (delmip) 17997c478bd9Sstevel@tonic-gate vfs_delmip(vfsp); 18007c478bd9Sstevel@tonic-gate ASSERT(vswp != NULL); 18017c478bd9Sstevel@tonic-gate vfs_unrefvfssw(vswp); 18027c478bd9Sstevel@tonic-gate if (inargs != opts) 18037c478bd9Sstevel@tonic-gate kmem_free(inargs, MAX_MNTOPT_STR); 18047c478bd9Sstevel@tonic-gate if (copyout_error) { 180593239addSjohnlev lofi_remove(vfsp); 18067c478bd9Sstevel@tonic-gate VFS_RELE(vfsp); 18077c478bd9Sstevel@tonic-gate error = copyout_error; 18087c478bd9Sstevel@tonic-gate } 18097c478bd9Sstevel@tonic-gate return (error); 18107c478bd9Sstevel@tonic-gate } 18117c478bd9Sstevel@tonic-gate 18127c478bd9Sstevel@tonic-gate static void 1813d7de0ceaSRobert Harris vfs_setpath( 1814d7de0ceaSRobert Harris struct vfs *vfsp, /* vfs being updated */ 1815d7de0ceaSRobert Harris refstr_t **refp, /* Ref-count string to contain the new path */ 1816d7de0ceaSRobert Harris const char *newpath, /* Path to add to refp (above) */ 1817d7de0ceaSRobert Harris uint32_t flag) /* flag */ 18187c478bd9Sstevel@tonic-gate { 18197c478bd9Sstevel@tonic-gate size_t len; 18207c478bd9Sstevel@tonic-gate refstr_t *ref; 18217c478bd9Sstevel@tonic-gate zone_t *zone = curproc->p_zone; 18227c478bd9Sstevel@tonic-gate char *sp; 18237c478bd9Sstevel@tonic-gate int have_list_lock = 0; 18247c478bd9Sstevel@tonic-gate 18257c478bd9Sstevel@tonic-gate ASSERT(!VFS_ON_LIST(vfsp) || vfs_lock_held(vfsp)); 18267c478bd9Sstevel@tonic-gate 18277c478bd9Sstevel@tonic-gate /* 18287c478bd9Sstevel@tonic-gate * New path must be less than MAXPATHLEN because mntfs 18297c478bd9Sstevel@tonic-gate * will only display up to MAXPATHLEN bytes. This is currently 18307c478bd9Sstevel@tonic-gate * safe, because domount() uses pn_get(), and other callers 18317c478bd9Sstevel@tonic-gate * similarly cap the size to fewer than MAXPATHLEN bytes. 18327c478bd9Sstevel@tonic-gate */ 18337c478bd9Sstevel@tonic-gate 18347c478bd9Sstevel@tonic-gate ASSERT(strlen(newpath) < MAXPATHLEN); 18357c478bd9Sstevel@tonic-gate 18367c478bd9Sstevel@tonic-gate /* mntfs requires consistency while vfs list lock is held */ 18377c478bd9Sstevel@tonic-gate 18387c478bd9Sstevel@tonic-gate if (VFS_ON_LIST(vfsp)) { 18397c478bd9Sstevel@tonic-gate have_list_lock = 1; 18407c478bd9Sstevel@tonic-gate vfs_list_lock(); 18417c478bd9Sstevel@tonic-gate } 18427c478bd9Sstevel@tonic-gate 18437c478bd9Sstevel@tonic-gate if (*refp != NULL) 18447c478bd9Sstevel@tonic-gate refstr_rele(*refp); 18457c478bd9Sstevel@tonic-gate 1846d7de0ceaSRobert Harris /* 1847d7de0ceaSRobert Harris * If we are in a non-global zone then we prefix the supplied path, 1848d7de0ceaSRobert Harris * newpath, with the zone's root path, with two exceptions. The first 1849d7de0ceaSRobert Harris * is where we have been explicitly directed to avoid doing so; this 1850d7de0ceaSRobert Harris * will be the case following a failed remount, where the path supplied 1851d7de0ceaSRobert Harris * will be a saved version which must now be restored. The second 1852d7de0ceaSRobert Harris * exception is where newpath is not a pathname but a descriptive name, 1853d7de0ceaSRobert Harris * e.g. "procfs". 1854d7de0ceaSRobert Harris */ 1855d7de0ceaSRobert Harris if (zone == global_zone || (flag & VFSSP_VERBATIM) || *newpath != '/') { 18567c478bd9Sstevel@tonic-gate ref = refstr_alloc(newpath); 18577c478bd9Sstevel@tonic-gate goto out; 18587c478bd9Sstevel@tonic-gate } 18597c478bd9Sstevel@tonic-gate 18607c478bd9Sstevel@tonic-gate /* 18617c478bd9Sstevel@tonic-gate * Truncate the trailing '/' in the zoneroot, and merge 18627c478bd9Sstevel@tonic-gate * in the zone's rootpath with the "newpath" (resource 18637c478bd9Sstevel@tonic-gate * or mountpoint) passed in. 18647c478bd9Sstevel@tonic-gate * 18657c478bd9Sstevel@tonic-gate * The size of the required buffer is thus the size of 18667c478bd9Sstevel@tonic-gate * the buffer required for the passed-in newpath 18677c478bd9Sstevel@tonic-gate * (strlen(newpath) + 1), plus the size of the buffer 18687c478bd9Sstevel@tonic-gate * required to hold zone_rootpath (zone_rootpathlen) 18697c478bd9Sstevel@tonic-gate * minus one for one of the now-superfluous NUL 18707c478bd9Sstevel@tonic-gate * terminations, minus one for the trailing '/'. 18717c478bd9Sstevel@tonic-gate * 18727c478bd9Sstevel@tonic-gate * That gives us: 18737c478bd9Sstevel@tonic-gate * 18747c478bd9Sstevel@tonic-gate * (strlen(newpath) + 1) + zone_rootpathlen - 1 - 1 18757c478bd9Sstevel@tonic-gate * 18767c478bd9Sstevel@tonic-gate * Which is what we have below. 18777c478bd9Sstevel@tonic-gate */ 18787c478bd9Sstevel@tonic-gate 18797c478bd9Sstevel@tonic-gate len = strlen(newpath) + zone->zone_rootpathlen - 1; 18807c478bd9Sstevel@tonic-gate sp = kmem_alloc(len, KM_SLEEP); 18817c478bd9Sstevel@tonic-gate 18827c478bd9Sstevel@tonic-gate /* 18837c478bd9Sstevel@tonic-gate * Copy everything including the trailing slash, which 18847c478bd9Sstevel@tonic-gate * we then overwrite with the NUL character. 18857c478bd9Sstevel@tonic-gate */ 18867c478bd9Sstevel@tonic-gate 18877c478bd9Sstevel@tonic-gate (void) strcpy(sp, zone->zone_rootpath); 18887c478bd9Sstevel@tonic-gate sp[zone->zone_rootpathlen - 2] = '\0'; 18897c478bd9Sstevel@tonic-gate (void) strcat(sp, newpath); 18907c478bd9Sstevel@tonic-gate 18917c478bd9Sstevel@tonic-gate ref = refstr_alloc(sp); 18927c478bd9Sstevel@tonic-gate kmem_free(sp, len); 18937c478bd9Sstevel@tonic-gate out: 18947c478bd9Sstevel@tonic-gate *refp = ref; 18957c478bd9Sstevel@tonic-gate 18967c478bd9Sstevel@tonic-gate if (have_list_lock) { 18977c478bd9Sstevel@tonic-gate vfs_mnttab_modtimeupd(); 18987c478bd9Sstevel@tonic-gate vfs_list_unlock(); 18997c478bd9Sstevel@tonic-gate } 19007c478bd9Sstevel@tonic-gate } 19017c478bd9Sstevel@tonic-gate 19027c478bd9Sstevel@tonic-gate /* 19037c478bd9Sstevel@tonic-gate * Record a mounted resource name in a vfs structure. 19047c478bd9Sstevel@tonic-gate * If vfsp is already mounted, caller must hold the vfs lock. 19057c478bd9Sstevel@tonic-gate */ 19067c478bd9Sstevel@tonic-gate void 1907d7de0ceaSRobert Harris vfs_setresource(struct vfs *vfsp, const char *resource, uint32_t flag) 19087c478bd9Sstevel@tonic-gate { 19097c478bd9Sstevel@tonic-gate if (resource == NULL || resource[0] == '\0') 19107c478bd9Sstevel@tonic-gate resource = VFS_NORESOURCE; 1911d7de0ceaSRobert Harris vfs_setpath(vfsp, &vfsp->vfs_resource, resource, flag); 19127c478bd9Sstevel@tonic-gate } 19137c478bd9Sstevel@tonic-gate 19147c478bd9Sstevel@tonic-gate /* 19157c478bd9Sstevel@tonic-gate * Record a mount point name in a vfs structure. 19167c478bd9Sstevel@tonic-gate * If vfsp is already mounted, caller must hold the vfs lock. 19177c478bd9Sstevel@tonic-gate */ 19187c478bd9Sstevel@tonic-gate void 1919d7de0ceaSRobert Harris vfs_setmntpoint(struct vfs *vfsp, const char *mntpt, uint32_t flag) 19207c478bd9Sstevel@tonic-gate { 19217c478bd9Sstevel@tonic-gate if (mntpt == NULL || mntpt[0] == '\0') 19227c478bd9Sstevel@tonic-gate mntpt = VFS_NOMNTPT; 1923d7de0ceaSRobert Harris vfs_setpath(vfsp, &vfsp->vfs_mntpt, mntpt, flag); 19247c478bd9Sstevel@tonic-gate } 19257c478bd9Sstevel@tonic-gate 19267c478bd9Sstevel@tonic-gate /* Returns the vfs_resource. Caller must call refstr_rele() when finished. */ 19277c478bd9Sstevel@tonic-gate 19287c478bd9Sstevel@tonic-gate refstr_t * 19297c478bd9Sstevel@tonic-gate vfs_getresource(const struct vfs *vfsp) 19307c478bd9Sstevel@tonic-gate { 19317c478bd9Sstevel@tonic-gate refstr_t *resource; 19327c478bd9Sstevel@tonic-gate 19337c478bd9Sstevel@tonic-gate vfs_list_read_lock(); 19347c478bd9Sstevel@tonic-gate resource = vfsp->vfs_resource; 19357c478bd9Sstevel@tonic-gate refstr_hold(resource); 19367c478bd9Sstevel@tonic-gate vfs_list_unlock(); 19377c478bd9Sstevel@tonic-gate 19387c478bd9Sstevel@tonic-gate return (resource); 19397c478bd9Sstevel@tonic-gate } 19407c478bd9Sstevel@tonic-gate 19417c478bd9Sstevel@tonic-gate /* Returns the vfs_mntpt. Caller must call refstr_rele() when finished. */ 19427c478bd9Sstevel@tonic-gate 19437c478bd9Sstevel@tonic-gate refstr_t * 19447c478bd9Sstevel@tonic-gate vfs_getmntpoint(const struct vfs *vfsp) 19457c478bd9Sstevel@tonic-gate { 19467c478bd9Sstevel@tonic-gate refstr_t *mntpt; 19477c478bd9Sstevel@tonic-gate 19487c478bd9Sstevel@tonic-gate vfs_list_read_lock(); 19497c478bd9Sstevel@tonic-gate mntpt = vfsp->vfs_mntpt; 19507c478bd9Sstevel@tonic-gate refstr_hold(mntpt); 19517c478bd9Sstevel@tonic-gate vfs_list_unlock(); 19527c478bd9Sstevel@tonic-gate 19537c478bd9Sstevel@tonic-gate return (mntpt); 19547c478bd9Sstevel@tonic-gate } 19557c478bd9Sstevel@tonic-gate 19567c478bd9Sstevel@tonic-gate /* 19577c478bd9Sstevel@tonic-gate * Create an empty options table with enough empty slots to hold all 19587c478bd9Sstevel@tonic-gate * The options in the options string passed as an argument. 19597c478bd9Sstevel@tonic-gate * Potentially prepend another options table. 19607c478bd9Sstevel@tonic-gate * 19617c478bd9Sstevel@tonic-gate * Note: caller is responsible for locking the vfs list, if needed, 19627c478bd9Sstevel@tonic-gate * to protect mops. 19637c478bd9Sstevel@tonic-gate */ 19647c478bd9Sstevel@tonic-gate static void 19657c478bd9Sstevel@tonic-gate vfs_createopttbl_extend(mntopts_t *mops, const char *opts, 19667c478bd9Sstevel@tonic-gate const mntopts_t *mtmpl) 19677c478bd9Sstevel@tonic-gate { 19687c478bd9Sstevel@tonic-gate const char *s = opts; 19697c478bd9Sstevel@tonic-gate uint_t count; 19707c478bd9Sstevel@tonic-gate 19717c478bd9Sstevel@tonic-gate if (opts == NULL || *opts == '\0') { 19727c478bd9Sstevel@tonic-gate count = 0; 19737c478bd9Sstevel@tonic-gate } else { 19747c478bd9Sstevel@tonic-gate count = 1; 19757c478bd9Sstevel@tonic-gate 19767c478bd9Sstevel@tonic-gate /* 19777c478bd9Sstevel@tonic-gate * Count number of options in the string 19787c478bd9Sstevel@tonic-gate */ 19797c478bd9Sstevel@tonic-gate for (s = strchr(s, ','); s != NULL; s = strchr(s, ',')) { 19807c478bd9Sstevel@tonic-gate count++; 19817c478bd9Sstevel@tonic-gate s++; 19827c478bd9Sstevel@tonic-gate } 19837c478bd9Sstevel@tonic-gate } 19847c478bd9Sstevel@tonic-gate vfs_copyopttbl_extend(mtmpl, mops, count); 19857c478bd9Sstevel@tonic-gate } 19867c478bd9Sstevel@tonic-gate 19877c478bd9Sstevel@tonic-gate /* 19887c478bd9Sstevel@tonic-gate * Create an empty options table with enough empty slots to hold all 19897c478bd9Sstevel@tonic-gate * The options in the options string passed as an argument. 19907c478bd9Sstevel@tonic-gate * 19917c478bd9Sstevel@tonic-gate * This function is *not* for general use by filesystems. 19927c478bd9Sstevel@tonic-gate * 19937c478bd9Sstevel@tonic-gate * Note: caller is responsible for locking the vfs list, if needed, 19947c478bd9Sstevel@tonic-gate * to protect mops. 19957c478bd9Sstevel@tonic-gate */ 19967c478bd9Sstevel@tonic-gate void 19977c478bd9Sstevel@tonic-gate vfs_createopttbl(mntopts_t *mops, const char *opts) 19987c478bd9Sstevel@tonic-gate { 19997c478bd9Sstevel@tonic-gate vfs_createopttbl_extend(mops, opts, NULL); 20007c478bd9Sstevel@tonic-gate } 20017c478bd9Sstevel@tonic-gate 20027c478bd9Sstevel@tonic-gate 20037c478bd9Sstevel@tonic-gate /* 20047c478bd9Sstevel@tonic-gate * Swap two mount options tables 20057c478bd9Sstevel@tonic-gate */ 20067c478bd9Sstevel@tonic-gate static void 20077c478bd9Sstevel@tonic-gate vfs_swapopttbl_nolock(mntopts_t *optbl1, mntopts_t *optbl2) 20087c478bd9Sstevel@tonic-gate { 20097c478bd9Sstevel@tonic-gate uint_t tmpcnt; 20107c478bd9Sstevel@tonic-gate mntopt_t *tmplist; 20117c478bd9Sstevel@tonic-gate 20127c478bd9Sstevel@tonic-gate tmpcnt = optbl2->mo_count; 20137c478bd9Sstevel@tonic-gate tmplist = optbl2->mo_list; 20147c478bd9Sstevel@tonic-gate optbl2->mo_count = optbl1->mo_count; 20157c478bd9Sstevel@tonic-gate optbl2->mo_list = optbl1->mo_list; 20167c478bd9Sstevel@tonic-gate optbl1->mo_count = tmpcnt; 20177c478bd9Sstevel@tonic-gate optbl1->mo_list = tmplist; 20187c478bd9Sstevel@tonic-gate } 20197c478bd9Sstevel@tonic-gate 20207c478bd9Sstevel@tonic-gate static void 20217c478bd9Sstevel@tonic-gate vfs_swapopttbl(mntopts_t *optbl1, mntopts_t *optbl2) 20227c478bd9Sstevel@tonic-gate { 20237c478bd9Sstevel@tonic-gate vfs_list_lock(); 20247c478bd9Sstevel@tonic-gate vfs_swapopttbl_nolock(optbl1, optbl2); 20257c478bd9Sstevel@tonic-gate vfs_mnttab_modtimeupd(); 20267c478bd9Sstevel@tonic-gate vfs_list_unlock(); 20277c478bd9Sstevel@tonic-gate } 20287c478bd9Sstevel@tonic-gate 20297c478bd9Sstevel@tonic-gate static char ** 20307c478bd9Sstevel@tonic-gate vfs_copycancelopt_extend(char **const moc, int extend) 20317c478bd9Sstevel@tonic-gate { 20327c478bd9Sstevel@tonic-gate int i = 0; 20337c478bd9Sstevel@tonic-gate int j; 20347c478bd9Sstevel@tonic-gate char **result; 20357c478bd9Sstevel@tonic-gate 20367c478bd9Sstevel@tonic-gate if (moc != NULL) { 20377c478bd9Sstevel@tonic-gate for (; moc[i] != NULL; i++) 20387c478bd9Sstevel@tonic-gate /* count number of options to cancel */; 20397c478bd9Sstevel@tonic-gate } 20407c478bd9Sstevel@tonic-gate 20417c478bd9Sstevel@tonic-gate if (i + extend == 0) 20427c478bd9Sstevel@tonic-gate return (NULL); 20437c478bd9Sstevel@tonic-gate 20447c478bd9Sstevel@tonic-gate result = kmem_alloc((i + extend + 1) * sizeof (char *), KM_SLEEP); 20457c478bd9Sstevel@tonic-gate 20467c478bd9Sstevel@tonic-gate for (j = 0; j < i; j++) { 20477c478bd9Sstevel@tonic-gate result[j] = kmem_alloc(strlen(moc[j]) + 1, KM_SLEEP); 20487c478bd9Sstevel@tonic-gate (void) strcpy(result[j], moc[j]); 20497c478bd9Sstevel@tonic-gate } 20507c478bd9Sstevel@tonic-gate for (; j <= i + extend; j++) 20517c478bd9Sstevel@tonic-gate result[j] = NULL; 20527c478bd9Sstevel@tonic-gate 20537c478bd9Sstevel@tonic-gate return (result); 20547c478bd9Sstevel@tonic-gate } 20557c478bd9Sstevel@tonic-gate 20567c478bd9Sstevel@tonic-gate static void 20577c478bd9Sstevel@tonic-gate vfs_copyopt(const mntopt_t *s, mntopt_t *d) 20587c478bd9Sstevel@tonic-gate { 20597c478bd9Sstevel@tonic-gate char *sp, *dp; 20607c478bd9Sstevel@tonic-gate 20617c478bd9Sstevel@tonic-gate d->mo_flags = s->mo_flags; 20627c478bd9Sstevel@tonic-gate d->mo_data = s->mo_data; 20637c478bd9Sstevel@tonic-gate sp = s->mo_name; 20647c478bd9Sstevel@tonic-gate if (sp != NULL) { 20657c478bd9Sstevel@tonic-gate dp = kmem_alloc(strlen(sp) + 1, KM_SLEEP); 20667c478bd9Sstevel@tonic-gate (void) strcpy(dp, sp); 20677c478bd9Sstevel@tonic-gate d->mo_name = dp; 20687c478bd9Sstevel@tonic-gate } else { 20697c478bd9Sstevel@tonic-gate d->mo_name = NULL; /* should never happen */ 20707c478bd9Sstevel@tonic-gate } 20717c478bd9Sstevel@tonic-gate 20727c478bd9Sstevel@tonic-gate d->mo_cancel = vfs_copycancelopt_extend(s->mo_cancel, 0); 20737c478bd9Sstevel@tonic-gate 20747c478bd9Sstevel@tonic-gate sp = s->mo_arg; 20757c478bd9Sstevel@tonic-gate if (sp != NULL) { 20767c478bd9Sstevel@tonic-gate dp = kmem_alloc(strlen(sp) + 1, KM_SLEEP); 20777c478bd9Sstevel@tonic-gate (void) strcpy(dp, sp); 20787c478bd9Sstevel@tonic-gate d->mo_arg = dp; 20797c478bd9Sstevel@tonic-gate } else { 20807c478bd9Sstevel@tonic-gate d->mo_arg = NULL; 20817c478bd9Sstevel@tonic-gate } 20827c478bd9Sstevel@tonic-gate } 20837c478bd9Sstevel@tonic-gate 20847c478bd9Sstevel@tonic-gate /* 20857c478bd9Sstevel@tonic-gate * Copy a mount options table, possibly allocating some spare 20867c478bd9Sstevel@tonic-gate * slots at the end. It is permissible to copy_extend the NULL table. 20877c478bd9Sstevel@tonic-gate */ 20887c478bd9Sstevel@tonic-gate static void 20897c478bd9Sstevel@tonic-gate vfs_copyopttbl_extend(const mntopts_t *smo, mntopts_t *dmo, int extra) 20907c478bd9Sstevel@tonic-gate { 20917c478bd9Sstevel@tonic-gate uint_t i, count; 20927c478bd9Sstevel@tonic-gate mntopt_t *motbl; 20937c478bd9Sstevel@tonic-gate 20947c478bd9Sstevel@tonic-gate /* 20957c478bd9Sstevel@tonic-gate * Clear out any existing stuff in the options table being initialized 20967c478bd9Sstevel@tonic-gate */ 20977c478bd9Sstevel@tonic-gate vfs_freeopttbl(dmo); 20987c478bd9Sstevel@tonic-gate count = (smo == NULL) ? 0 : smo->mo_count; 20997c478bd9Sstevel@tonic-gate if ((count + extra) == 0) /* nothing to do */ 21007c478bd9Sstevel@tonic-gate return; 21017c478bd9Sstevel@tonic-gate dmo->mo_count = count + extra; 21027c478bd9Sstevel@tonic-gate motbl = kmem_zalloc((count + extra) * sizeof (mntopt_t), KM_SLEEP); 21037c478bd9Sstevel@tonic-gate dmo->mo_list = motbl; 21047c478bd9Sstevel@tonic-gate for (i = 0; i < count; i++) { 21057c478bd9Sstevel@tonic-gate vfs_copyopt(&smo->mo_list[i], &motbl[i]); 21067c478bd9Sstevel@tonic-gate } 21077c478bd9Sstevel@tonic-gate for (i = count; i < count + extra; i++) { 21087c478bd9Sstevel@tonic-gate motbl[i].mo_flags = MO_EMPTY; 21097c478bd9Sstevel@tonic-gate } 21107c478bd9Sstevel@tonic-gate } 21117c478bd9Sstevel@tonic-gate 21127c478bd9Sstevel@tonic-gate /* 21137c478bd9Sstevel@tonic-gate * Copy a mount options table. 21147c478bd9Sstevel@tonic-gate * 21157c478bd9Sstevel@tonic-gate * This function is *not* for general use by filesystems. 21167c478bd9Sstevel@tonic-gate * 21177c478bd9Sstevel@tonic-gate * Note: caller is responsible for locking the vfs list, if needed, 21187c478bd9Sstevel@tonic-gate * to protect smo and dmo. 21197c478bd9Sstevel@tonic-gate */ 21207c478bd9Sstevel@tonic-gate void 21217c478bd9Sstevel@tonic-gate vfs_copyopttbl(const mntopts_t *smo, mntopts_t *dmo) 21227c478bd9Sstevel@tonic-gate { 21237c478bd9Sstevel@tonic-gate vfs_copyopttbl_extend(smo, dmo, 0); 21247c478bd9Sstevel@tonic-gate } 21257c478bd9Sstevel@tonic-gate 21267c478bd9Sstevel@tonic-gate static char ** 21277c478bd9Sstevel@tonic-gate vfs_mergecancelopts(const mntopt_t *mop1, const mntopt_t *mop2) 21287c478bd9Sstevel@tonic-gate { 21297c478bd9Sstevel@tonic-gate int c1 = 0; 21307c478bd9Sstevel@tonic-gate int c2 = 0; 21317c478bd9Sstevel@tonic-gate char **result; 21327c478bd9Sstevel@tonic-gate char **sp1, **sp2, **dp; 21337c478bd9Sstevel@tonic-gate 21347c478bd9Sstevel@tonic-gate /* 21357c478bd9Sstevel@tonic-gate * First we count both lists of cancel options. 21367c478bd9Sstevel@tonic-gate * If either is NULL or has no elements, we return a copy of 21377c478bd9Sstevel@tonic-gate * the other. 21387c478bd9Sstevel@tonic-gate */ 21397c478bd9Sstevel@tonic-gate if (mop1->mo_cancel != NULL) { 21407c478bd9Sstevel@tonic-gate for (; mop1->mo_cancel[c1] != NULL; c1++) 21417c478bd9Sstevel@tonic-gate /* count cancel options in mop1 */; 21427c478bd9Sstevel@tonic-gate } 21437c478bd9Sstevel@tonic-gate 21447c478bd9Sstevel@tonic-gate if (c1 == 0) 21457c478bd9Sstevel@tonic-gate return (vfs_copycancelopt_extend(mop2->mo_cancel, 0)); 21467c478bd9Sstevel@tonic-gate 21477c478bd9Sstevel@tonic-gate if (mop2->mo_cancel != NULL) { 21487c478bd9Sstevel@tonic-gate for (; mop2->mo_cancel[c2] != NULL; c2++) 21497c478bd9Sstevel@tonic-gate /* count cancel options in mop2 */; 21507c478bd9Sstevel@tonic-gate } 21517c478bd9Sstevel@tonic-gate 21527c478bd9Sstevel@tonic-gate result = vfs_copycancelopt_extend(mop1->mo_cancel, c2); 21537c478bd9Sstevel@tonic-gate 21547c478bd9Sstevel@tonic-gate if (c2 == 0) 21557c478bd9Sstevel@tonic-gate return (result); 21567c478bd9Sstevel@tonic-gate 21577c478bd9Sstevel@tonic-gate /* 21587c478bd9Sstevel@tonic-gate * When we get here, we've got two sets of cancel options; 21597c478bd9Sstevel@tonic-gate * we need to merge the two sets. We know that the result 21607c478bd9Sstevel@tonic-gate * array has "c1+c2+1" entries and in the end we might shrink 21617c478bd9Sstevel@tonic-gate * it. 21627c478bd9Sstevel@tonic-gate * Result now has a copy of the c1 entries from mop1; we'll 21637c478bd9Sstevel@tonic-gate * now lookup all the entries of mop2 in mop1 and copy it if 21647c478bd9Sstevel@tonic-gate * it is unique. 21657c478bd9Sstevel@tonic-gate * This operation is O(n^2) but it's only called once per 21667c478bd9Sstevel@tonic-gate * filesystem per duplicate option. This is a situation 21677c478bd9Sstevel@tonic-gate * which doesn't arise with the filesystems in ON and 21687c478bd9Sstevel@tonic-gate * n is generally 1. 21697c478bd9Sstevel@tonic-gate */ 21707c478bd9Sstevel@tonic-gate 21717c478bd9Sstevel@tonic-gate dp = &result[c1]; 21727c478bd9Sstevel@tonic-gate for (sp2 = mop2->mo_cancel; *sp2 != NULL; sp2++) { 21737c478bd9Sstevel@tonic-gate for (sp1 = mop1->mo_cancel; *sp1 != NULL; sp1++) { 21747c478bd9Sstevel@tonic-gate if (strcmp(*sp1, *sp2) == 0) 21757c478bd9Sstevel@tonic-gate break; 21767c478bd9Sstevel@tonic-gate } 21777c478bd9Sstevel@tonic-gate if (*sp1 == NULL) { 21787c478bd9Sstevel@tonic-gate /* 21797c478bd9Sstevel@tonic-gate * Option *sp2 not found in mop1, so copy it. 21807c478bd9Sstevel@tonic-gate * The calls to vfs_copycancelopt_extend() 21817c478bd9Sstevel@tonic-gate * guarantee that there's enough room. 21827c478bd9Sstevel@tonic-gate */ 21837c478bd9Sstevel@tonic-gate *dp = kmem_alloc(strlen(*sp2) + 1, KM_SLEEP); 21847c478bd9Sstevel@tonic-gate (void) strcpy(*dp++, *sp2); 21857c478bd9Sstevel@tonic-gate } 21867c478bd9Sstevel@tonic-gate } 21877c478bd9Sstevel@tonic-gate if (dp != &result[c1+c2]) { 21887c478bd9Sstevel@tonic-gate size_t bytes = (dp - result + 1) * sizeof (char *); 21897c478bd9Sstevel@tonic-gate char **nres = kmem_alloc(bytes, KM_SLEEP); 21907c478bd9Sstevel@tonic-gate 21917c478bd9Sstevel@tonic-gate bcopy(result, nres, bytes); 21927c478bd9Sstevel@tonic-gate kmem_free(result, (c1 + c2 + 1) * sizeof (char *)); 21937c478bd9Sstevel@tonic-gate result = nres; 21947c478bd9Sstevel@tonic-gate } 21957c478bd9Sstevel@tonic-gate return (result); 21967c478bd9Sstevel@tonic-gate } 21977c478bd9Sstevel@tonic-gate 21987c478bd9Sstevel@tonic-gate /* 21997c478bd9Sstevel@tonic-gate * Merge two mount option tables (outer and inner) into one. This is very 22007c478bd9Sstevel@tonic-gate * similar to "merging" global variables and automatic variables in C. 22017c478bd9Sstevel@tonic-gate * 22027c478bd9Sstevel@tonic-gate * This isn't (and doesn't have to be) fast. 22037c478bd9Sstevel@tonic-gate * 22047c478bd9Sstevel@tonic-gate * This function is *not* for general use by filesystems. 22057c478bd9Sstevel@tonic-gate * 22067c478bd9Sstevel@tonic-gate * Note: caller is responsible for locking the vfs list, if needed, 22077c478bd9Sstevel@tonic-gate * to protect omo, imo & dmo. 22087c478bd9Sstevel@tonic-gate */ 22097c478bd9Sstevel@tonic-gate void 22107c478bd9Sstevel@tonic-gate vfs_mergeopttbl(const mntopts_t *omo, const mntopts_t *imo, mntopts_t *dmo) 22117c478bd9Sstevel@tonic-gate { 22127c478bd9Sstevel@tonic-gate uint_t i, count; 22137c478bd9Sstevel@tonic-gate mntopt_t *mop, *motbl; 22147c478bd9Sstevel@tonic-gate uint_t freeidx; 22157c478bd9Sstevel@tonic-gate 22167c478bd9Sstevel@tonic-gate /* 22177c478bd9Sstevel@tonic-gate * First determine how much space we need to allocate. 22187c478bd9Sstevel@tonic-gate */ 22197c478bd9Sstevel@tonic-gate count = omo->mo_count; 22207c478bd9Sstevel@tonic-gate for (i = 0; i < imo->mo_count; i++) { 22217c478bd9Sstevel@tonic-gate if (imo->mo_list[i].mo_flags & MO_EMPTY) 22227c478bd9Sstevel@tonic-gate continue; 22237c478bd9Sstevel@tonic-gate if (vfs_hasopt(omo, imo->mo_list[i].mo_name) == NULL) 22247c478bd9Sstevel@tonic-gate count++; 22257c478bd9Sstevel@tonic-gate } 22267c478bd9Sstevel@tonic-gate ASSERT(count >= omo->mo_count && 22277c478bd9Sstevel@tonic-gate count <= omo->mo_count + imo->mo_count); 22287c478bd9Sstevel@tonic-gate motbl = kmem_alloc(count * sizeof (mntopt_t), KM_SLEEP); 22297c478bd9Sstevel@tonic-gate for (i = 0; i < omo->mo_count; i++) 22307c478bd9Sstevel@tonic-gate vfs_copyopt(&omo->mo_list[i], &motbl[i]); 22317c478bd9Sstevel@tonic-gate freeidx = omo->mo_count; 22327c478bd9Sstevel@tonic-gate for (i = 0; i < imo->mo_count; i++) { 22337c478bd9Sstevel@tonic-gate if (imo->mo_list[i].mo_flags & MO_EMPTY) 22347c478bd9Sstevel@tonic-gate continue; 22357c478bd9Sstevel@tonic-gate if ((mop = vfs_hasopt(omo, imo->mo_list[i].mo_name)) != NULL) { 22367c478bd9Sstevel@tonic-gate char **newcanp; 22377c478bd9Sstevel@tonic-gate uint_t index = mop - omo->mo_list; 22387c478bd9Sstevel@tonic-gate 22397c478bd9Sstevel@tonic-gate newcanp = vfs_mergecancelopts(mop, &motbl[index]); 22407c478bd9Sstevel@tonic-gate 22417c478bd9Sstevel@tonic-gate vfs_freeopt(&motbl[index]); 22427c478bd9Sstevel@tonic-gate vfs_copyopt(&imo->mo_list[i], &motbl[index]); 22437c478bd9Sstevel@tonic-gate 22447c478bd9Sstevel@tonic-gate vfs_freecancelopt(motbl[index].mo_cancel); 22457c478bd9Sstevel@tonic-gate motbl[index].mo_cancel = newcanp; 22467c478bd9Sstevel@tonic-gate } else { 22477c478bd9Sstevel@tonic-gate /* 22487c478bd9Sstevel@tonic-gate * If it's a new option, just copy it over to the first 22497c478bd9Sstevel@tonic-gate * free location. 22507c478bd9Sstevel@tonic-gate */ 22517c478bd9Sstevel@tonic-gate vfs_copyopt(&imo->mo_list[i], &motbl[freeidx++]); 22527c478bd9Sstevel@tonic-gate } 22537c478bd9Sstevel@tonic-gate } 22547c478bd9Sstevel@tonic-gate dmo->mo_count = count; 22557c478bd9Sstevel@tonic-gate dmo->mo_list = motbl; 22567c478bd9Sstevel@tonic-gate } 22577c478bd9Sstevel@tonic-gate 22587c478bd9Sstevel@tonic-gate /* 22597c478bd9Sstevel@tonic-gate * Functions to set and clear mount options in a mount options table. 22607c478bd9Sstevel@tonic-gate */ 22617c478bd9Sstevel@tonic-gate 22627c478bd9Sstevel@tonic-gate /* 22637c478bd9Sstevel@tonic-gate * Clear a mount option, if it exists. 22647c478bd9Sstevel@tonic-gate * 22657c478bd9Sstevel@tonic-gate * The update_mnttab arg indicates whether mops is part of a vfs that is on 22667c478bd9Sstevel@tonic-gate * the vfs list. 22677c478bd9Sstevel@tonic-gate */ 22687c478bd9Sstevel@tonic-gate static void 22697c478bd9Sstevel@tonic-gate vfs_clearmntopt_nolock(mntopts_t *mops, const char *opt, int update_mnttab) 22707c478bd9Sstevel@tonic-gate { 22717c478bd9Sstevel@tonic-gate struct mntopt *mop; 22727c478bd9Sstevel@tonic-gate uint_t i, count; 22737c478bd9Sstevel@tonic-gate 22747c478bd9Sstevel@tonic-gate ASSERT(!update_mnttab || RW_WRITE_HELD(&vfslist)); 22757c478bd9Sstevel@tonic-gate 22767c478bd9Sstevel@tonic-gate count = mops->mo_count; 22777c478bd9Sstevel@tonic-gate for (i = 0; i < count; i++) { 22787c478bd9Sstevel@tonic-gate mop = &mops->mo_list[i]; 22797c478bd9Sstevel@tonic-gate 22807c478bd9Sstevel@tonic-gate if (mop->mo_flags & MO_EMPTY) 22817c478bd9Sstevel@tonic-gate continue; 22827c478bd9Sstevel@tonic-gate if (strcmp(opt, mop->mo_name)) 22837c478bd9Sstevel@tonic-gate continue; 22847c478bd9Sstevel@tonic-gate mop->mo_flags &= ~MO_SET; 22857c478bd9Sstevel@tonic-gate if (mop->mo_arg != NULL) { 22867c478bd9Sstevel@tonic-gate kmem_free(mop->mo_arg, strlen(mop->mo_arg) + 1); 22877c478bd9Sstevel@tonic-gate } 22887c478bd9Sstevel@tonic-gate mop->mo_arg = NULL; 22897c478bd9Sstevel@tonic-gate if (update_mnttab) 22907c478bd9Sstevel@tonic-gate vfs_mnttab_modtimeupd(); 22917c478bd9Sstevel@tonic-gate break; 22927c478bd9Sstevel@tonic-gate } 22937c478bd9Sstevel@tonic-gate } 22947c478bd9Sstevel@tonic-gate 22957c478bd9Sstevel@tonic-gate void 22967c478bd9Sstevel@tonic-gate vfs_clearmntopt(struct vfs *vfsp, const char *opt) 22977c478bd9Sstevel@tonic-gate { 22987c478bd9Sstevel@tonic-gate int gotlock = 0; 22997c478bd9Sstevel@tonic-gate 23007c478bd9Sstevel@tonic-gate if (VFS_ON_LIST(vfsp)) { 23017c478bd9Sstevel@tonic-gate gotlock = 1; 23027c478bd9Sstevel@tonic-gate vfs_list_lock(); 23037c478bd9Sstevel@tonic-gate } 23047c478bd9Sstevel@tonic-gate vfs_clearmntopt_nolock(&vfsp->vfs_mntopts, opt, gotlock); 23057c478bd9Sstevel@tonic-gate if (gotlock) 23067c478bd9Sstevel@tonic-gate vfs_list_unlock(); 23077c478bd9Sstevel@tonic-gate } 23087c478bd9Sstevel@tonic-gate 23097c478bd9Sstevel@tonic-gate 23107c478bd9Sstevel@tonic-gate /* 23117c478bd9Sstevel@tonic-gate * Set a mount option on. If it's not found in the table, it's silently 23127c478bd9Sstevel@tonic-gate * ignored. If the option has MO_IGNORE set, it is still set unless the 23137c478bd9Sstevel@tonic-gate * VFS_NOFORCEOPT bit is set in the flags. Also, VFS_DISPLAY/VFS_NODISPLAY flag 23147c478bd9Sstevel@tonic-gate * bits can be used to toggle the MO_NODISPLAY bit for the option. 23157c478bd9Sstevel@tonic-gate * If the VFS_CREATEOPT flag bit is set then the first option slot with 23167c478bd9Sstevel@tonic-gate * MO_EMPTY set is created as the option passed in. 23177c478bd9Sstevel@tonic-gate * 23187c478bd9Sstevel@tonic-gate * The update_mnttab arg indicates whether mops is part of a vfs that is on 23197c478bd9Sstevel@tonic-gate * the vfs list. 23207c478bd9Sstevel@tonic-gate */ 23217c478bd9Sstevel@tonic-gate static void 23227c478bd9Sstevel@tonic-gate vfs_setmntopt_nolock(mntopts_t *mops, const char *opt, 23237c478bd9Sstevel@tonic-gate const char *arg, int flags, int update_mnttab) 23247c478bd9Sstevel@tonic-gate { 23257c478bd9Sstevel@tonic-gate mntopt_t *mop; 23267c478bd9Sstevel@tonic-gate uint_t i, count; 23277c478bd9Sstevel@tonic-gate char *sp; 23287c478bd9Sstevel@tonic-gate 23297c478bd9Sstevel@tonic-gate ASSERT(!update_mnttab || RW_WRITE_HELD(&vfslist)); 23307c478bd9Sstevel@tonic-gate 23317c478bd9Sstevel@tonic-gate if (flags & VFS_CREATEOPT) { 23327c478bd9Sstevel@tonic-gate if (vfs_hasopt(mops, opt) != NULL) { 23337c478bd9Sstevel@tonic-gate flags &= ~VFS_CREATEOPT; 23347c478bd9Sstevel@tonic-gate } 23357c478bd9Sstevel@tonic-gate } 23367c478bd9Sstevel@tonic-gate count = mops->mo_count; 23377c478bd9Sstevel@tonic-gate for (i = 0; i < count; i++) { 23387c478bd9Sstevel@tonic-gate mop = &mops->mo_list[i]; 23397c478bd9Sstevel@tonic-gate 23407c478bd9Sstevel@tonic-gate if (mop->mo_flags & MO_EMPTY) { 23417c478bd9Sstevel@tonic-gate if ((flags & VFS_CREATEOPT) == 0) 23427c478bd9Sstevel@tonic-gate continue; 23437c478bd9Sstevel@tonic-gate sp = kmem_alloc(strlen(opt) + 1, KM_SLEEP); 23447c478bd9Sstevel@tonic-gate (void) strcpy(sp, opt); 23457c478bd9Sstevel@tonic-gate mop->mo_name = sp; 23467c478bd9Sstevel@tonic-gate if (arg != NULL) 23477c478bd9Sstevel@tonic-gate mop->mo_flags = MO_HASVALUE; 23487c478bd9Sstevel@tonic-gate else 23497c478bd9Sstevel@tonic-gate mop->mo_flags = 0; 23507c478bd9Sstevel@tonic-gate } else if (strcmp(opt, mop->mo_name)) { 23517c478bd9Sstevel@tonic-gate continue; 23527c478bd9Sstevel@tonic-gate } 23537c478bd9Sstevel@tonic-gate if ((mop->mo_flags & MO_IGNORE) && (flags & VFS_NOFORCEOPT)) 23547c478bd9Sstevel@tonic-gate break; 23557c478bd9Sstevel@tonic-gate if (arg != NULL && (mop->mo_flags & MO_HASVALUE) != 0) { 23567c478bd9Sstevel@tonic-gate sp = kmem_alloc(strlen(arg) + 1, KM_SLEEP); 23577c478bd9Sstevel@tonic-gate (void) strcpy(sp, arg); 23587c478bd9Sstevel@tonic-gate } else { 23597c478bd9Sstevel@tonic-gate sp = NULL; 23607c478bd9Sstevel@tonic-gate } 23617c478bd9Sstevel@tonic-gate if (mop->mo_arg != NULL) 23627c478bd9Sstevel@tonic-gate kmem_free(mop->mo_arg, strlen(mop->mo_arg) + 1); 23637c478bd9Sstevel@tonic-gate mop->mo_arg = sp; 23647c478bd9Sstevel@tonic-gate if (flags & VFS_DISPLAY) 23657c478bd9Sstevel@tonic-gate mop->mo_flags &= ~MO_NODISPLAY; 23667c478bd9Sstevel@tonic-gate if (flags & VFS_NODISPLAY) 23677c478bd9Sstevel@tonic-gate mop->mo_flags |= MO_NODISPLAY; 23687c478bd9Sstevel@tonic-gate mop->mo_flags |= MO_SET; 23697c478bd9Sstevel@tonic-gate if (mop->mo_cancel != NULL) { 23707c478bd9Sstevel@tonic-gate char **cp; 23717c478bd9Sstevel@tonic-gate 23727c478bd9Sstevel@tonic-gate for (cp = mop->mo_cancel; *cp != NULL; cp++) 23737c478bd9Sstevel@tonic-gate vfs_clearmntopt_nolock(mops, *cp, 0); 23747c478bd9Sstevel@tonic-gate } 23757c478bd9Sstevel@tonic-gate if (update_mnttab) 23767c478bd9Sstevel@tonic-gate vfs_mnttab_modtimeupd(); 23777c478bd9Sstevel@tonic-gate break; 23787c478bd9Sstevel@tonic-gate } 23797c478bd9Sstevel@tonic-gate } 23807c478bd9Sstevel@tonic-gate 23817c478bd9Sstevel@tonic-gate void 23827c478bd9Sstevel@tonic-gate vfs_setmntopt(struct vfs *vfsp, const char *opt, const char *arg, int flags) 23837c478bd9Sstevel@tonic-gate { 23847c478bd9Sstevel@tonic-gate int gotlock = 0; 23857c478bd9Sstevel@tonic-gate 23867c478bd9Sstevel@tonic-gate if (VFS_ON_LIST(vfsp)) { 23877c478bd9Sstevel@tonic-gate gotlock = 1; 23887c478bd9Sstevel@tonic-gate vfs_list_lock(); 23897c478bd9Sstevel@tonic-gate } 23907c478bd9Sstevel@tonic-gate vfs_setmntopt_nolock(&vfsp->vfs_mntopts, opt, arg, flags, gotlock); 23917c478bd9Sstevel@tonic-gate if (gotlock) 23927c478bd9Sstevel@tonic-gate vfs_list_unlock(); 23937c478bd9Sstevel@tonic-gate } 23947c478bd9Sstevel@tonic-gate 23957c478bd9Sstevel@tonic-gate 23967c478bd9Sstevel@tonic-gate /* 23977c478bd9Sstevel@tonic-gate * Add a "tag" option to a mounted file system's options list. 23987c478bd9Sstevel@tonic-gate * 23997c478bd9Sstevel@tonic-gate * Note: caller is responsible for locking the vfs list, if needed, 24007c478bd9Sstevel@tonic-gate * to protect mops. 24017c478bd9Sstevel@tonic-gate */ 24027c478bd9Sstevel@tonic-gate static mntopt_t * 24037c478bd9Sstevel@tonic-gate vfs_addtag(mntopts_t *mops, const char *tag) 24047c478bd9Sstevel@tonic-gate { 24057c478bd9Sstevel@tonic-gate uint_t count; 24067c478bd9Sstevel@tonic-gate mntopt_t *mop, *motbl; 24077c478bd9Sstevel@tonic-gate 24087c478bd9Sstevel@tonic-gate count = mops->mo_count + 1; 24097c478bd9Sstevel@tonic-gate motbl = kmem_zalloc(count * sizeof (mntopt_t), KM_SLEEP); 24107c478bd9Sstevel@tonic-gate if (mops->mo_count) { 24117c478bd9Sstevel@tonic-gate size_t len = (count - 1) * sizeof (mntopt_t); 24127c478bd9Sstevel@tonic-gate 24137c478bd9Sstevel@tonic-gate bcopy(mops->mo_list, motbl, len); 24147c478bd9Sstevel@tonic-gate kmem_free(mops->mo_list, len); 24157c478bd9Sstevel@tonic-gate } 24167c478bd9Sstevel@tonic-gate mops->mo_count = count; 24177c478bd9Sstevel@tonic-gate mops->mo_list = motbl; 24187c478bd9Sstevel@tonic-gate mop = &motbl[count - 1]; 24197c478bd9Sstevel@tonic-gate mop->mo_flags = MO_TAG; 24207c478bd9Sstevel@tonic-gate mop->mo_name = kmem_alloc(strlen(tag) + 1, KM_SLEEP); 24217c478bd9Sstevel@tonic-gate (void) strcpy(mop->mo_name, tag); 24227c478bd9Sstevel@tonic-gate return (mop); 24237c478bd9Sstevel@tonic-gate } 24247c478bd9Sstevel@tonic-gate 24257c478bd9Sstevel@tonic-gate /* 24267c478bd9Sstevel@tonic-gate * Allow users to set arbitrary "tags" in a vfs's mount options. 24277c478bd9Sstevel@tonic-gate * Broader use within the kernel is discouraged. 24287c478bd9Sstevel@tonic-gate */ 24297c478bd9Sstevel@tonic-gate int 24307c478bd9Sstevel@tonic-gate vfs_settag(uint_t major, uint_t minor, const char *mntpt, const char *tag, 24317c478bd9Sstevel@tonic-gate cred_t *cr) 24327c478bd9Sstevel@tonic-gate { 24337c478bd9Sstevel@tonic-gate vfs_t *vfsp; 24347c478bd9Sstevel@tonic-gate mntopts_t *mops; 24357c478bd9Sstevel@tonic-gate mntopt_t *mop; 24367c478bd9Sstevel@tonic-gate int found = 0; 24377c478bd9Sstevel@tonic-gate dev_t dev = makedevice(major, minor); 24387c478bd9Sstevel@tonic-gate int err = 0; 24397c478bd9Sstevel@tonic-gate char *buf = kmem_alloc(MAX_MNTOPT_STR, KM_SLEEP); 24407c478bd9Sstevel@tonic-gate 24417c478bd9Sstevel@tonic-gate /* 24427c478bd9Sstevel@tonic-gate * Find the desired mounted file system 24437c478bd9Sstevel@tonic-gate */ 24447c478bd9Sstevel@tonic-gate vfs_list_lock(); 24457c478bd9Sstevel@tonic-gate vfsp = rootvfs; 24467c478bd9Sstevel@tonic-gate do { 24477c478bd9Sstevel@tonic-gate if (vfsp->vfs_dev == dev && 24487c478bd9Sstevel@tonic-gate strcmp(mntpt, refstr_value(vfsp->vfs_mntpt)) == 0) { 24497c478bd9Sstevel@tonic-gate found = 1; 24507c478bd9Sstevel@tonic-gate break; 24517c478bd9Sstevel@tonic-gate } 24527c478bd9Sstevel@tonic-gate vfsp = vfsp->vfs_next; 24537c478bd9Sstevel@tonic-gate } while (vfsp != rootvfs); 24547c478bd9Sstevel@tonic-gate 24557c478bd9Sstevel@tonic-gate if (!found) { 24567c478bd9Sstevel@tonic-gate err = EINVAL; 24577c478bd9Sstevel@tonic-gate goto out; 24587c478bd9Sstevel@tonic-gate } 24597c478bd9Sstevel@tonic-gate err = secpolicy_fs_config(cr, vfsp); 24607c478bd9Sstevel@tonic-gate if (err != 0) 24617c478bd9Sstevel@tonic-gate goto out; 24627c478bd9Sstevel@tonic-gate 24637c478bd9Sstevel@tonic-gate mops = &vfsp->vfs_mntopts; 24647c478bd9Sstevel@tonic-gate /* 24657c478bd9Sstevel@tonic-gate * Add tag if it doesn't already exist 24667c478bd9Sstevel@tonic-gate */ 24677c478bd9Sstevel@tonic-gate if ((mop = vfs_hasopt(mops, tag)) == NULL) { 24687c478bd9Sstevel@tonic-gate int len; 24697c478bd9Sstevel@tonic-gate 24707c478bd9Sstevel@tonic-gate (void) vfs_buildoptionstr(mops, buf, MAX_MNTOPT_STR); 24717c478bd9Sstevel@tonic-gate len = strlen(buf); 24727c478bd9Sstevel@tonic-gate if (len + strlen(tag) + 2 > MAX_MNTOPT_STR) { 24737c478bd9Sstevel@tonic-gate err = ENAMETOOLONG; 24747c478bd9Sstevel@tonic-gate goto out; 24757c478bd9Sstevel@tonic-gate } 24767c478bd9Sstevel@tonic-gate mop = vfs_addtag(mops, tag); 24777c478bd9Sstevel@tonic-gate } 24787c478bd9Sstevel@tonic-gate if ((mop->mo_flags & MO_TAG) == 0) { 24797c478bd9Sstevel@tonic-gate err = EINVAL; 24807c478bd9Sstevel@tonic-gate goto out; 24817c478bd9Sstevel@tonic-gate } 24827c478bd9Sstevel@tonic-gate vfs_setmntopt_nolock(mops, tag, NULL, 0, 1); 24837c478bd9Sstevel@tonic-gate out: 24847c478bd9Sstevel@tonic-gate vfs_list_unlock(); 24857c478bd9Sstevel@tonic-gate kmem_free(buf, MAX_MNTOPT_STR); 24867c478bd9Sstevel@tonic-gate return (err); 24877c478bd9Sstevel@tonic-gate } 24887c478bd9Sstevel@tonic-gate 24897c478bd9Sstevel@tonic-gate /* 24907c478bd9Sstevel@tonic-gate * Allow users to remove arbitrary "tags" in a vfs's mount options. 24917c478bd9Sstevel@tonic-gate * Broader use within the kernel is discouraged. 24927c478bd9Sstevel@tonic-gate */ 24937c478bd9Sstevel@tonic-gate int 24947c478bd9Sstevel@tonic-gate vfs_clrtag(uint_t major, uint_t minor, const char *mntpt, const char *tag, 24957c478bd9Sstevel@tonic-gate cred_t *cr) 24967c478bd9Sstevel@tonic-gate { 24977c478bd9Sstevel@tonic-gate vfs_t *vfsp; 24987c478bd9Sstevel@tonic-gate mntopt_t *mop; 24997c478bd9Sstevel@tonic-gate int found = 0; 25007c478bd9Sstevel@tonic-gate dev_t dev = makedevice(major, minor); 25017c478bd9Sstevel@tonic-gate int err = 0; 25027c478bd9Sstevel@tonic-gate 25037c478bd9Sstevel@tonic-gate /* 25047c478bd9Sstevel@tonic-gate * Find the desired mounted file system 25057c478bd9Sstevel@tonic-gate */ 25067c478bd9Sstevel@tonic-gate vfs_list_lock(); 25077c478bd9Sstevel@tonic-gate vfsp = rootvfs; 25087c478bd9Sstevel@tonic-gate do { 25097c478bd9Sstevel@tonic-gate if (vfsp->vfs_dev == dev && 25107c478bd9Sstevel@tonic-gate strcmp(mntpt, refstr_value(vfsp->vfs_mntpt)) == 0) { 25117c478bd9Sstevel@tonic-gate found = 1; 25127c478bd9Sstevel@tonic-gate break; 25137c478bd9Sstevel@tonic-gate } 25147c478bd9Sstevel@tonic-gate vfsp = vfsp->vfs_next; 25157c478bd9Sstevel@tonic-gate } while (vfsp != rootvfs); 25167c478bd9Sstevel@tonic-gate 25177c478bd9Sstevel@tonic-gate if (!found) { 25187c478bd9Sstevel@tonic-gate err = EINVAL; 25197c478bd9Sstevel@tonic-gate goto out; 25207c478bd9Sstevel@tonic-gate } 25217c478bd9Sstevel@tonic-gate err = secpolicy_fs_config(cr, vfsp); 25227c478bd9Sstevel@tonic-gate if (err != 0) 25237c478bd9Sstevel@tonic-gate goto out; 25247c478bd9Sstevel@tonic-gate 25257c478bd9Sstevel@tonic-gate if ((mop = vfs_hasopt(&vfsp->vfs_mntopts, tag)) == NULL) { 25267c478bd9Sstevel@tonic-gate err = EINVAL; 25277c478bd9Sstevel@tonic-gate goto out; 25287c478bd9Sstevel@tonic-gate } 25297c478bd9Sstevel@tonic-gate if ((mop->mo_flags & MO_TAG) == 0) { 25307c478bd9Sstevel@tonic-gate err = EINVAL; 25317c478bd9Sstevel@tonic-gate goto out; 25327c478bd9Sstevel@tonic-gate } 25337c478bd9Sstevel@tonic-gate vfs_clearmntopt_nolock(&vfsp->vfs_mntopts, tag, 1); 25347c478bd9Sstevel@tonic-gate out: 25357c478bd9Sstevel@tonic-gate vfs_list_unlock(); 25367c478bd9Sstevel@tonic-gate return (err); 25377c478bd9Sstevel@tonic-gate } 25387c478bd9Sstevel@tonic-gate 25397c478bd9Sstevel@tonic-gate /* 25407c478bd9Sstevel@tonic-gate * Function to parse an option string and fill in a mount options table. 25417c478bd9Sstevel@tonic-gate * Unknown options are silently ignored. The input option string is modified 25427c478bd9Sstevel@tonic-gate * by replacing separators with nulls. If the create flag is set, options 25437c478bd9Sstevel@tonic-gate * not found in the table are just added on the fly. The table must have 25447c478bd9Sstevel@tonic-gate * an option slot marked MO_EMPTY to add an option on the fly. 25457c478bd9Sstevel@tonic-gate * 25467c478bd9Sstevel@tonic-gate * This function is *not* for general use by filesystems. 25477c478bd9Sstevel@tonic-gate * 25487c478bd9Sstevel@tonic-gate * Note: caller is responsible for locking the vfs list, if needed, 25497c478bd9Sstevel@tonic-gate * to protect mops.. 25507c478bd9Sstevel@tonic-gate */ 25517c478bd9Sstevel@tonic-gate void 25527c478bd9Sstevel@tonic-gate vfs_parsemntopts(mntopts_t *mops, char *osp, int create) 25537c478bd9Sstevel@tonic-gate { 25547c478bd9Sstevel@tonic-gate char *s = osp, *p, *nextop, *valp, *cp, *ep; 25557c478bd9Sstevel@tonic-gate int setflg = VFS_NOFORCEOPT; 25567c478bd9Sstevel@tonic-gate 25577c478bd9Sstevel@tonic-gate if (osp == NULL) 25587c478bd9Sstevel@tonic-gate return; 25597c478bd9Sstevel@tonic-gate while (*s != '\0') { 25607c478bd9Sstevel@tonic-gate p = strchr(s, ','); /* find next option */ 25617c478bd9Sstevel@tonic-gate if (p == NULL) { 25627c478bd9Sstevel@tonic-gate cp = NULL; 25637c478bd9Sstevel@tonic-gate p = s + strlen(s); 25647c478bd9Sstevel@tonic-gate } else { 25657c478bd9Sstevel@tonic-gate cp = p; /* save location of comma */ 25667c478bd9Sstevel@tonic-gate *p++ = '\0'; /* mark end and point to next option */ 25677c478bd9Sstevel@tonic-gate } 25687c478bd9Sstevel@tonic-gate nextop = p; 25697c478bd9Sstevel@tonic-gate p = strchr(s, '='); /* look for value */ 25707c478bd9Sstevel@tonic-gate if (p == NULL) { 25717c478bd9Sstevel@tonic-gate valp = NULL; /* no value supplied */ 25727c478bd9Sstevel@tonic-gate } else { 25737c478bd9Sstevel@tonic-gate ep = p; /* save location of equals */ 25747c478bd9Sstevel@tonic-gate *p++ = '\0'; /* end option and point to value */ 25757c478bd9Sstevel@tonic-gate valp = p; 25767c478bd9Sstevel@tonic-gate } 25777c478bd9Sstevel@tonic-gate /* 25787c478bd9Sstevel@tonic-gate * set option into options table 25797c478bd9Sstevel@tonic-gate */ 25807c478bd9Sstevel@tonic-gate if (create) 25817c478bd9Sstevel@tonic-gate setflg |= VFS_CREATEOPT; 25827c478bd9Sstevel@tonic-gate vfs_setmntopt_nolock(mops, s, valp, setflg, 0); 25837c478bd9Sstevel@tonic-gate if (cp != NULL) 25847c478bd9Sstevel@tonic-gate *cp = ','; /* restore the comma */ 25857c478bd9Sstevel@tonic-gate if (valp != NULL) 25867c478bd9Sstevel@tonic-gate *ep = '='; /* restore the equals */ 25877c478bd9Sstevel@tonic-gate s = nextop; 25887c478bd9Sstevel@tonic-gate } 25897c478bd9Sstevel@tonic-gate } 25907c478bd9Sstevel@tonic-gate 25917c478bd9Sstevel@tonic-gate /* 25927c478bd9Sstevel@tonic-gate * Function to inquire if an option exists in a mount options table. 25937c478bd9Sstevel@tonic-gate * Returns a pointer to the option if it exists, else NULL. 25947c478bd9Sstevel@tonic-gate * 25957c478bd9Sstevel@tonic-gate * This function is *not* for general use by filesystems. 25967c478bd9Sstevel@tonic-gate * 25977c478bd9Sstevel@tonic-gate * Note: caller is responsible for locking the vfs list, if needed, 25987c478bd9Sstevel@tonic-gate * to protect mops. 25997c478bd9Sstevel@tonic-gate */ 26007c478bd9Sstevel@tonic-gate struct mntopt * 26017c478bd9Sstevel@tonic-gate vfs_hasopt(const mntopts_t *mops, const char *opt) 26027c478bd9Sstevel@tonic-gate { 26037c478bd9Sstevel@tonic-gate struct mntopt *mop; 26047c478bd9Sstevel@tonic-gate uint_t i, count; 26057c478bd9Sstevel@tonic-gate 26067c478bd9Sstevel@tonic-gate count = mops->mo_count; 26077c478bd9Sstevel@tonic-gate for (i = 0; i < count; i++) { 26087c478bd9Sstevel@tonic-gate mop = &mops->mo_list[i]; 26097c478bd9Sstevel@tonic-gate 26107c478bd9Sstevel@tonic-gate if (mop->mo_flags & MO_EMPTY) 26117c478bd9Sstevel@tonic-gate continue; 26127c478bd9Sstevel@tonic-gate if (strcmp(opt, mop->mo_name) == 0) 26137c478bd9Sstevel@tonic-gate return (mop); 26147c478bd9Sstevel@tonic-gate } 26157c478bd9Sstevel@tonic-gate return (NULL); 26167c478bd9Sstevel@tonic-gate } 26177c478bd9Sstevel@tonic-gate 26187c478bd9Sstevel@tonic-gate /* 26197c478bd9Sstevel@tonic-gate * Function to inquire if an option is set in a mount options table. 26207c478bd9Sstevel@tonic-gate * Returns non-zero if set and fills in the arg pointer with a pointer to 26217c478bd9Sstevel@tonic-gate * the argument string or NULL if there is no argument string. 26227c478bd9Sstevel@tonic-gate */ 26237c478bd9Sstevel@tonic-gate static int 26247c478bd9Sstevel@tonic-gate vfs_optionisset_nolock(const mntopts_t *mops, const char *opt, char **argp) 26257c478bd9Sstevel@tonic-gate { 26267c478bd9Sstevel@tonic-gate struct mntopt *mop; 26277c478bd9Sstevel@tonic-gate uint_t i, count; 26287c478bd9Sstevel@tonic-gate 26297c478bd9Sstevel@tonic-gate count = mops->mo_count; 26307c478bd9Sstevel@tonic-gate for (i = 0; i < count; i++) { 26317c478bd9Sstevel@tonic-gate mop = &mops->mo_list[i]; 26327c478bd9Sstevel@tonic-gate 26337c478bd9Sstevel@tonic-gate if (mop->mo_flags & MO_EMPTY) 26347c478bd9Sstevel@tonic-gate continue; 26357c478bd9Sstevel@tonic-gate if (strcmp(opt, mop->mo_name)) 26367c478bd9Sstevel@tonic-gate continue; 26377c478bd9Sstevel@tonic-gate if ((mop->mo_flags & MO_SET) == 0) 26387c478bd9Sstevel@tonic-gate return (0); 26397c478bd9Sstevel@tonic-gate if (argp != NULL && (mop->mo_flags & MO_HASVALUE) != 0) 26407c478bd9Sstevel@tonic-gate *argp = mop->mo_arg; 26417c478bd9Sstevel@tonic-gate return (1); 26427c478bd9Sstevel@tonic-gate } 26437c478bd9Sstevel@tonic-gate return (0); 26447c478bd9Sstevel@tonic-gate } 26457c478bd9Sstevel@tonic-gate 26467c478bd9Sstevel@tonic-gate 26477c478bd9Sstevel@tonic-gate int 26487c478bd9Sstevel@tonic-gate vfs_optionisset(const struct vfs *vfsp, const char *opt, char **argp) 26497c478bd9Sstevel@tonic-gate { 26507c478bd9Sstevel@tonic-gate int ret; 26517c478bd9Sstevel@tonic-gate 26527c478bd9Sstevel@tonic-gate vfs_list_read_lock(); 26537c478bd9Sstevel@tonic-gate ret = vfs_optionisset_nolock(&vfsp->vfs_mntopts, opt, argp); 26547c478bd9Sstevel@tonic-gate vfs_list_unlock(); 26557c478bd9Sstevel@tonic-gate return (ret); 26567c478bd9Sstevel@tonic-gate } 26577c478bd9Sstevel@tonic-gate 26587c478bd9Sstevel@tonic-gate 26597c478bd9Sstevel@tonic-gate /* 26607c478bd9Sstevel@tonic-gate * Construct a comma separated string of the options set in the given 26617c478bd9Sstevel@tonic-gate * mount table, return the string in the given buffer. Return non-zero if 26627c478bd9Sstevel@tonic-gate * the buffer would overflow. 26637c478bd9Sstevel@tonic-gate * 26647c478bd9Sstevel@tonic-gate * This function is *not* for general use by filesystems. 26657c478bd9Sstevel@tonic-gate * 26667c478bd9Sstevel@tonic-gate * Note: caller is responsible for locking the vfs list, if needed, 26677c478bd9Sstevel@tonic-gate * to protect mp. 26687c478bd9Sstevel@tonic-gate */ 26697c478bd9Sstevel@tonic-gate int 26707c478bd9Sstevel@tonic-gate vfs_buildoptionstr(const mntopts_t *mp, char *buf, int len) 26717c478bd9Sstevel@tonic-gate { 26727c478bd9Sstevel@tonic-gate char *cp; 26737c478bd9Sstevel@tonic-gate uint_t i; 26747c478bd9Sstevel@tonic-gate 26757c478bd9Sstevel@tonic-gate buf[0] = '\0'; 26767c478bd9Sstevel@tonic-gate cp = buf; 26777c478bd9Sstevel@tonic-gate for (i = 0; i < mp->mo_count; i++) { 26787c478bd9Sstevel@tonic-gate struct mntopt *mop; 26797c478bd9Sstevel@tonic-gate 26807c478bd9Sstevel@tonic-gate mop = &mp->mo_list[i]; 26817c478bd9Sstevel@tonic-gate if (mop->mo_flags & MO_SET) { 26827c478bd9Sstevel@tonic-gate int optlen, comma = 0; 26837c478bd9Sstevel@tonic-gate 26847c478bd9Sstevel@tonic-gate if (buf[0] != '\0') 26857c478bd9Sstevel@tonic-gate comma = 1; 26867c478bd9Sstevel@tonic-gate optlen = strlen(mop->mo_name); 26877c478bd9Sstevel@tonic-gate if (strlen(buf) + comma + optlen + 1 > len) 26887c478bd9Sstevel@tonic-gate goto err; 26897c478bd9Sstevel@tonic-gate if (comma) 26907c478bd9Sstevel@tonic-gate *cp++ = ','; 26917c478bd9Sstevel@tonic-gate (void) strcpy(cp, mop->mo_name); 26927c478bd9Sstevel@tonic-gate cp += optlen; 26937c478bd9Sstevel@tonic-gate /* 26947c478bd9Sstevel@tonic-gate * Append option value if there is one 26957c478bd9Sstevel@tonic-gate */ 26967c478bd9Sstevel@tonic-gate if (mop->mo_arg != NULL) { 26977c478bd9Sstevel@tonic-gate int arglen; 26987c478bd9Sstevel@tonic-gate 26997c478bd9Sstevel@tonic-gate arglen = strlen(mop->mo_arg); 27007c478bd9Sstevel@tonic-gate if (strlen(buf) + arglen + 2 > len) 27017c478bd9Sstevel@tonic-gate goto err; 27027c478bd9Sstevel@tonic-gate *cp++ = '='; 27037c478bd9Sstevel@tonic-gate (void) strcpy(cp, mop->mo_arg); 27047c478bd9Sstevel@tonic-gate cp += arglen; 27057c478bd9Sstevel@tonic-gate } 27067c478bd9Sstevel@tonic-gate } 27077c478bd9Sstevel@tonic-gate } 27087c478bd9Sstevel@tonic-gate return (0); 27097c478bd9Sstevel@tonic-gate err: 27107c478bd9Sstevel@tonic-gate return (EOVERFLOW); 27117c478bd9Sstevel@tonic-gate } 27127c478bd9Sstevel@tonic-gate 27137c478bd9Sstevel@tonic-gate static void 27147c478bd9Sstevel@tonic-gate vfs_freecancelopt(char **moc) 27157c478bd9Sstevel@tonic-gate { 27167c478bd9Sstevel@tonic-gate if (moc != NULL) { 27177c478bd9Sstevel@tonic-gate int ccnt = 0; 27187c478bd9Sstevel@tonic-gate char **cp; 27197c478bd9Sstevel@tonic-gate 27207c478bd9Sstevel@tonic-gate for (cp = moc; *cp != NULL; cp++) { 27217c478bd9Sstevel@tonic-gate kmem_free(*cp, strlen(*cp) + 1); 27227c478bd9Sstevel@tonic-gate ccnt++; 27237c478bd9Sstevel@tonic-gate } 27247c478bd9Sstevel@tonic-gate kmem_free(moc, (ccnt + 1) * sizeof (char *)); 27257c478bd9Sstevel@tonic-gate } 27267c478bd9Sstevel@tonic-gate } 27277c478bd9Sstevel@tonic-gate 27287c478bd9Sstevel@tonic-gate static void 27297c478bd9Sstevel@tonic-gate vfs_freeopt(mntopt_t *mop) 27307c478bd9Sstevel@tonic-gate { 27317c478bd9Sstevel@tonic-gate if (mop->mo_name != NULL) 27327c478bd9Sstevel@tonic-gate kmem_free(mop->mo_name, strlen(mop->mo_name) + 1); 27337c478bd9Sstevel@tonic-gate 27347c478bd9Sstevel@tonic-gate vfs_freecancelopt(mop->mo_cancel); 27357c478bd9Sstevel@tonic-gate 27367c478bd9Sstevel@tonic-gate if (mop->mo_arg != NULL) 27377c478bd9Sstevel@tonic-gate kmem_free(mop->mo_arg, strlen(mop->mo_arg) + 1); 27387c478bd9Sstevel@tonic-gate } 27397c478bd9Sstevel@tonic-gate 27407c478bd9Sstevel@tonic-gate /* 27417c478bd9Sstevel@tonic-gate * Free a mount options table 27427c478bd9Sstevel@tonic-gate * 27437c478bd9Sstevel@tonic-gate * This function is *not* for general use by filesystems. 27447c478bd9Sstevel@tonic-gate * 27457c478bd9Sstevel@tonic-gate * Note: caller is responsible for locking the vfs list, if needed, 27467c478bd9Sstevel@tonic-gate * to protect mp. 27477c478bd9Sstevel@tonic-gate */ 27487c478bd9Sstevel@tonic-gate void 27497c478bd9Sstevel@tonic-gate vfs_freeopttbl(mntopts_t *mp) 27507c478bd9Sstevel@tonic-gate { 27517c478bd9Sstevel@tonic-gate uint_t i, count; 27527c478bd9Sstevel@tonic-gate 27537c478bd9Sstevel@tonic-gate count = mp->mo_count; 27547c478bd9Sstevel@tonic-gate for (i = 0; i < count; i++) { 27557c478bd9Sstevel@tonic-gate vfs_freeopt(&mp->mo_list[i]); 27567c478bd9Sstevel@tonic-gate } 27577c478bd9Sstevel@tonic-gate if (count) { 27587c478bd9Sstevel@tonic-gate kmem_free(mp->mo_list, sizeof (mntopt_t) * count); 27597c478bd9Sstevel@tonic-gate mp->mo_count = 0; 27607c478bd9Sstevel@tonic-gate mp->mo_list = NULL; 27617c478bd9Sstevel@tonic-gate } 27627c478bd9Sstevel@tonic-gate } 27637c478bd9Sstevel@tonic-gate 2764df2381bfSpraks 2765df2381bfSpraks /* ARGSUSED */ 2766df2381bfSpraks static int 2767df2381bfSpraks vfs_mntdummyread(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cred, 2768406fc510SToomas Soome caller_context_t *ct) 2769df2381bfSpraks { 2770df2381bfSpraks return (0); 2771df2381bfSpraks } 2772df2381bfSpraks 2773df2381bfSpraks /* ARGSUSED */ 2774df2381bfSpraks static int 2775df2381bfSpraks vfs_mntdummywrite(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cred, 2776406fc510SToomas Soome caller_context_t *ct) 2777df2381bfSpraks { 2778df2381bfSpraks return (0); 2779df2381bfSpraks } 2780df2381bfSpraks 2781df2381bfSpraks /* 2782df2381bfSpraks * The dummy vnode is currently used only by file events notification 2783df2381bfSpraks * module which is just interested in the timestamps. 2784df2381bfSpraks */ 2785df2381bfSpraks /* ARGSUSED */ 2786df2381bfSpraks static int 2787da6c28aaSamw vfs_mntdummygetattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2788da6c28aaSamw caller_context_t *ct) 2789df2381bfSpraks { 2790df2381bfSpraks bzero(vap, sizeof (vattr_t)); 2791df2381bfSpraks vap->va_type = VREG; 2792df2381bfSpraks vap->va_nlink = 1; 2793df2381bfSpraks vap->va_ctime = vfs_mnttab_ctime; 2794df2381bfSpraks /* 2795df2381bfSpraks * it is ok to just copy mtime as the time will be monotonically 2796df2381bfSpraks * increasing. 2797df2381bfSpraks */ 2798df2381bfSpraks vap->va_mtime = vfs_mnttab_mtime; 2799df2381bfSpraks vap->va_atime = vap->va_mtime; 2800df2381bfSpraks return (0); 2801df2381bfSpraks } 2802df2381bfSpraks 2803df2381bfSpraks static void 2804df2381bfSpraks vfs_mnttabvp_setup(void) 2805df2381bfSpraks { 2806df2381bfSpraks vnode_t *tvp; 2807df2381bfSpraks vnodeops_t *vfs_mntdummyvnops; 2808df2381bfSpraks const fs_operation_def_t mnt_dummyvnodeops_template[] = { 2809df2381bfSpraks VOPNAME_READ, { .vop_read = vfs_mntdummyread }, 2810df2381bfSpraks VOPNAME_WRITE, { .vop_write = vfs_mntdummywrite }, 2811df2381bfSpraks VOPNAME_GETATTR, { .vop_getattr = vfs_mntdummygetattr }, 2812df2381bfSpraks VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 2813df2381bfSpraks NULL, NULL 2814df2381bfSpraks }; 2815df2381bfSpraks 2816df2381bfSpraks if (vn_make_ops("mnttab", mnt_dummyvnodeops_template, 2817df2381bfSpraks &vfs_mntdummyvnops) != 0) { 2818df2381bfSpraks cmn_err(CE_WARN, "vfs_mnttabvp_setup: vn_make_ops failed"); 2819df2381bfSpraks /* Shouldn't happen, but not bad enough to panic */ 2820df2381bfSpraks return; 2821df2381bfSpraks } 2822df2381bfSpraks 2823df2381bfSpraks /* 2824df2381bfSpraks * A global dummy vnode is allocated to represent mntfs files. 2825df2381bfSpraks * The mntfs file (/etc/mnttab) can be monitored for file events 2826df2381bfSpraks * and receive an event when mnttab changes. Dummy VOP calls 2827df2381bfSpraks * will be made on this vnode. The file events notification module 2828df2381bfSpraks * intercepts this vnode and delivers relevant events. 2829df2381bfSpraks */ 2830df2381bfSpraks tvp = vn_alloc(KM_SLEEP); 2831df2381bfSpraks tvp->v_flag = VNOMOUNT|VNOMAP|VNOSWAP|VNOCACHE; 2832df2381bfSpraks vn_setops(tvp, vfs_mntdummyvnops); 2833df2381bfSpraks tvp->v_type = VREG; 2834df2381bfSpraks /* 2835df2381bfSpraks * The mnt dummy ops do not reference v_data. 2836df2381bfSpraks * No other module intercepting this vnode should either. 2837df2381bfSpraks * Just set it to point to itself. 2838df2381bfSpraks */ 2839df2381bfSpraks tvp->v_data = (caddr_t)tvp; 2840df2381bfSpraks tvp->v_vfsp = rootvfs; 2841df2381bfSpraks vfs_mntdummyvp = tvp; 2842df2381bfSpraks } 2843df2381bfSpraks 2844df2381bfSpraks /* 2845df2381bfSpraks * performs fake read/write ops 2846df2381bfSpraks */ 2847df2381bfSpraks static void 2848df2381bfSpraks vfs_mnttab_rwop(int rw) 2849df2381bfSpraks { 2850df2381bfSpraks struct uio uio; 2851df2381bfSpraks struct iovec iov; 2852df2381bfSpraks char buf[1]; 2853df2381bfSpraks 2854df2381bfSpraks if (vfs_mntdummyvp == NULL) 2855df2381bfSpraks return; 2856df2381bfSpraks 2857df2381bfSpraks bzero(&uio, sizeof (uio)); 2858df2381bfSpraks bzero(&iov, sizeof (iov)); 2859df2381bfSpraks iov.iov_base = buf; 2860df2381bfSpraks iov.iov_len = 0; 2861df2381bfSpraks uio.uio_iov = &iov; 2862df2381bfSpraks uio.uio_iovcnt = 1; 2863df2381bfSpraks uio.uio_loffset = 0; 2864df2381bfSpraks uio.uio_segflg = UIO_SYSSPACE; 2865df2381bfSpraks uio.uio_resid = 0; 2866df2381bfSpraks if (rw) { 2867df2381bfSpraks (void) VOP_WRITE(vfs_mntdummyvp, &uio, 0, kcred, NULL); 2868df2381bfSpraks } else { 2869df2381bfSpraks (void) VOP_READ(vfs_mntdummyvp, &uio, 0, kcred, NULL); 2870df2381bfSpraks } 2871df2381bfSpraks } 2872df2381bfSpraks 2873df2381bfSpraks /* 2874df2381bfSpraks * Generate a write operation. 2875df2381bfSpraks */ 2876df2381bfSpraks void 2877df2381bfSpraks vfs_mnttab_writeop(void) 2878df2381bfSpraks { 2879df2381bfSpraks vfs_mnttab_rwop(1); 2880df2381bfSpraks } 2881df2381bfSpraks 2882df2381bfSpraks /* 2883df2381bfSpraks * Generate a read operation. 2884df2381bfSpraks */ 2885df2381bfSpraks void 2886df2381bfSpraks vfs_mnttab_readop(void) 2887df2381bfSpraks { 2888df2381bfSpraks vfs_mnttab_rwop(0); 2889df2381bfSpraks } 2890df2381bfSpraks 28917c478bd9Sstevel@tonic-gate /* 28927c478bd9Sstevel@tonic-gate * Free any mnttab information recorded in the vfs struct. 28937c478bd9Sstevel@tonic-gate * The vfs must not be on the vfs list. 28947c478bd9Sstevel@tonic-gate */ 28957c478bd9Sstevel@tonic-gate static void 28967c478bd9Sstevel@tonic-gate vfs_freemnttab(struct vfs *vfsp) 28977c478bd9Sstevel@tonic-gate { 28987c478bd9Sstevel@tonic-gate ASSERT(!VFS_ON_LIST(vfsp)); 28997c478bd9Sstevel@tonic-gate 29007c478bd9Sstevel@tonic-gate /* 29017c478bd9Sstevel@tonic-gate * Free device and mount point information 29027c478bd9Sstevel@tonic-gate */ 29037c478bd9Sstevel@tonic-gate if (vfsp->vfs_mntpt != NULL) { 29047c478bd9Sstevel@tonic-gate refstr_rele(vfsp->vfs_mntpt); 29057c478bd9Sstevel@tonic-gate vfsp->vfs_mntpt = NULL; 29067c478bd9Sstevel@tonic-gate } 29077c478bd9Sstevel@tonic-gate if (vfsp->vfs_resource != NULL) { 29087c478bd9Sstevel@tonic-gate refstr_rele(vfsp->vfs_resource); 29097c478bd9Sstevel@tonic-gate vfsp->vfs_resource = NULL; 29107c478bd9Sstevel@tonic-gate } 29117c478bd9Sstevel@tonic-gate /* 29127c478bd9Sstevel@tonic-gate * Now free mount options information 29137c478bd9Sstevel@tonic-gate */ 29147c478bd9Sstevel@tonic-gate vfs_freeopttbl(&vfsp->vfs_mntopts); 29157c478bd9Sstevel@tonic-gate } 29167c478bd9Sstevel@tonic-gate 29177c478bd9Sstevel@tonic-gate /* 29187c478bd9Sstevel@tonic-gate * Return the last mnttab modification time 29197c478bd9Sstevel@tonic-gate */ 29207c478bd9Sstevel@tonic-gate void 29217c478bd9Sstevel@tonic-gate vfs_mnttab_modtime(timespec_t *ts) 29227c478bd9Sstevel@tonic-gate { 29237c478bd9Sstevel@tonic-gate ASSERT(RW_LOCK_HELD(&vfslist)); 29247c478bd9Sstevel@tonic-gate *ts = vfs_mnttab_mtime; 29257c478bd9Sstevel@tonic-gate } 29267c478bd9Sstevel@tonic-gate 29277c478bd9Sstevel@tonic-gate /* 29287c478bd9Sstevel@tonic-gate * See if mnttab is changed 29297c478bd9Sstevel@tonic-gate */ 29307c478bd9Sstevel@tonic-gate void 29317c478bd9Sstevel@tonic-gate vfs_mnttab_poll(timespec_t *old, struct pollhead **phpp) 29327c478bd9Sstevel@tonic-gate { 29337c478bd9Sstevel@tonic-gate int changed; 29347c478bd9Sstevel@tonic-gate 29357c478bd9Sstevel@tonic-gate *phpp = (struct pollhead *)NULL; 29367c478bd9Sstevel@tonic-gate 29377c478bd9Sstevel@tonic-gate /* 29387c478bd9Sstevel@tonic-gate * Note: don't grab vfs list lock before accessing vfs_mnttab_mtime. 29397c478bd9Sstevel@tonic-gate * Can lead to deadlock against vfs_mnttab_modtimeupd(). It is safe 29407c478bd9Sstevel@tonic-gate * to not grab the vfs list lock because tv_sec is monotonically 29417c478bd9Sstevel@tonic-gate * increasing. 29427c478bd9Sstevel@tonic-gate */ 29437c478bd9Sstevel@tonic-gate 29447c478bd9Sstevel@tonic-gate changed = (old->tv_nsec != vfs_mnttab_mtime.tv_nsec) || 29457c478bd9Sstevel@tonic-gate (old->tv_sec != vfs_mnttab_mtime.tv_sec); 29467c478bd9Sstevel@tonic-gate if (!changed) { 29477c478bd9Sstevel@tonic-gate *phpp = &vfs_pollhd; 29487c478bd9Sstevel@tonic-gate } 29497c478bd9Sstevel@tonic-gate } 29507c478bd9Sstevel@tonic-gate 2951835ee219SRobert Harris /* Provide a unique and monotonically-increasing timestamp. */ 2952835ee219SRobert Harris void 2953835ee219SRobert Harris vfs_mono_time(timespec_t *ts) 2954835ee219SRobert Harris { 2955835ee219SRobert Harris static volatile hrtime_t hrt; /* The saved time. */ 2956835ee219SRobert Harris hrtime_t newhrt, oldhrt; /* For effecting the CAS. */ 2957835ee219SRobert Harris timespec_t newts; 2958835ee219SRobert Harris 29594ba8a214SRobert Harris /* 29604ba8a214SRobert Harris * Try gethrestime() first, but be prepared to fabricate a sensible 29614ba8a214SRobert Harris * answer at the first sign of any trouble. 29624ba8a214SRobert Harris */ 2963835ee219SRobert Harris gethrestime(&newts); 2964835ee219SRobert Harris newhrt = ts2hrt(&newts); 29654ba8a214SRobert Harris for (;;) { 2966835ee219SRobert Harris oldhrt = hrt; 29674ba8a214SRobert Harris if (newhrt <= hrt) 29684ba8a214SRobert Harris newhrt = hrt + 1; 296975d94465SJosef 'Jeff' Sipek if (atomic_cas_64((uint64_t *)&hrt, oldhrt, newhrt) == oldhrt) 29704ba8a214SRobert Harris break; 29714ba8a214SRobert Harris } 2972835ee219SRobert Harris hrt2ts(newhrt, ts); 2973835ee219SRobert Harris } 2974835ee219SRobert Harris 29757c478bd9Sstevel@tonic-gate /* 29767c478bd9Sstevel@tonic-gate * Update the mnttab modification time and wake up any waiters for 29777c478bd9Sstevel@tonic-gate * mnttab changes 29787c478bd9Sstevel@tonic-gate */ 29797c478bd9Sstevel@tonic-gate void 29807c478bd9Sstevel@tonic-gate vfs_mnttab_modtimeupd() 29817c478bd9Sstevel@tonic-gate { 29824ba8a214SRobert Harris hrtime_t oldhrt, newhrt; 29834ba8a214SRobert Harris 29847c478bd9Sstevel@tonic-gate ASSERT(RW_WRITE_HELD(&vfslist)); 29854ba8a214SRobert Harris oldhrt = ts2hrt(&vfs_mnttab_mtime); 29864ba8a214SRobert Harris gethrestime(&vfs_mnttab_mtime); 29874ba8a214SRobert Harris newhrt = ts2hrt(&vfs_mnttab_mtime); 29884ba8a214SRobert Harris if (oldhrt == (hrtime_t)0) 29897c478bd9Sstevel@tonic-gate vfs_mnttab_ctime = vfs_mnttab_mtime; 29904ba8a214SRobert Harris /* 29914ba8a214SRobert Harris * Attempt to provide unique mtime (like uniqtime but not). 29924ba8a214SRobert Harris */ 29934ba8a214SRobert Harris if (newhrt == oldhrt) { 29944ba8a214SRobert Harris newhrt++; 29954ba8a214SRobert Harris hrt2ts(newhrt, &vfs_mnttab_mtime); 29964ba8a214SRobert Harris } 29977c478bd9Sstevel@tonic-gate pollwakeup(&vfs_pollhd, (short)POLLRDBAND); 2998df2381bfSpraks vfs_mnttab_writeop(); 29997c478bd9Sstevel@tonic-gate } 30007c478bd9Sstevel@tonic-gate 30017c478bd9Sstevel@tonic-gate int 30027c478bd9Sstevel@tonic-gate dounmount(struct vfs *vfsp, int flag, cred_t *cr) 30037c478bd9Sstevel@tonic-gate { 30047c478bd9Sstevel@tonic-gate vnode_t *coveredvp; 30057c478bd9Sstevel@tonic-gate int error; 30065a59a8b3Srsb extern void teardown_vopstats(vfs_t *); 30077c478bd9Sstevel@tonic-gate 30087c478bd9Sstevel@tonic-gate /* 30097c478bd9Sstevel@tonic-gate * Get covered vnode. This will be NULL if the vfs is not linked 30107c478bd9Sstevel@tonic-gate * into the file system name space (i.e., domount() with MNT_NOSPICE). 30117c478bd9Sstevel@tonic-gate */ 30127c478bd9Sstevel@tonic-gate coveredvp = vfsp->vfs_vnodecovered; 30137c478bd9Sstevel@tonic-gate ASSERT(coveredvp == NULL || vn_vfswlock_held(coveredvp)); 30147c478bd9Sstevel@tonic-gate 30157c478bd9Sstevel@tonic-gate /* 30167c478bd9Sstevel@tonic-gate * Purge all dnlc entries for this vfs. 30177c478bd9Sstevel@tonic-gate */ 30187c478bd9Sstevel@tonic-gate (void) dnlc_purge_vfsp(vfsp, 0); 30197c478bd9Sstevel@tonic-gate 30207c478bd9Sstevel@tonic-gate /* For forcible umount, skip VFS_SYNC() since it may hang */ 30217c478bd9Sstevel@tonic-gate if ((flag & MS_FORCE) == 0) 30227c478bd9Sstevel@tonic-gate (void) VFS_SYNC(vfsp, 0, cr); 30237c478bd9Sstevel@tonic-gate 30247c478bd9Sstevel@tonic-gate /* 30257c478bd9Sstevel@tonic-gate * Lock the vfs to maintain fs status quo during unmount. This 30267c478bd9Sstevel@tonic-gate * has to be done after the sync because ufs_update tries to acquire 30277c478bd9Sstevel@tonic-gate * the vfs_reflock. 30287c478bd9Sstevel@tonic-gate */ 30297c478bd9Sstevel@tonic-gate vfs_lock_wait(vfsp); 30307c478bd9Sstevel@tonic-gate 30317c478bd9Sstevel@tonic-gate if (error = VFS_UNMOUNT(vfsp, flag, cr)) { 30327c478bd9Sstevel@tonic-gate vfs_unlock(vfsp); 30337c478bd9Sstevel@tonic-gate if (coveredvp != NULL) 30347c478bd9Sstevel@tonic-gate vn_vfsunlock(coveredvp); 30357c478bd9Sstevel@tonic-gate } else if (coveredvp != NULL) { 30365a59a8b3Srsb teardown_vopstats(vfsp); 30377c478bd9Sstevel@tonic-gate /* 30387c478bd9Sstevel@tonic-gate * vfs_remove() will do a VN_RELE(vfsp->vfs_vnodecovered) 30397c478bd9Sstevel@tonic-gate * when it frees vfsp so we do a VN_HOLD() so we can 30407c478bd9Sstevel@tonic-gate * continue to use coveredvp afterwards. 30417c478bd9Sstevel@tonic-gate */ 30427c478bd9Sstevel@tonic-gate VN_HOLD(coveredvp); 30437c478bd9Sstevel@tonic-gate vfs_remove(vfsp); 30447c478bd9Sstevel@tonic-gate vn_vfsunlock(coveredvp); 30457c478bd9Sstevel@tonic-gate VN_RELE(coveredvp); 30467c478bd9Sstevel@tonic-gate } else { 30475a59a8b3Srsb teardown_vopstats(vfsp); 30487c478bd9Sstevel@tonic-gate /* 30497c478bd9Sstevel@tonic-gate * Release the reference to vfs that is not linked 30507c478bd9Sstevel@tonic-gate * into the name space. 30517c478bd9Sstevel@tonic-gate */ 30527c478bd9Sstevel@tonic-gate vfs_unlock(vfsp); 30537c478bd9Sstevel@tonic-gate VFS_RELE(vfsp); 30547c478bd9Sstevel@tonic-gate } 30557c478bd9Sstevel@tonic-gate return (error); 30567c478bd9Sstevel@tonic-gate } 30577c478bd9Sstevel@tonic-gate 30587c478bd9Sstevel@tonic-gate 30597c478bd9Sstevel@tonic-gate /* 30607c478bd9Sstevel@tonic-gate * Vfs_unmountall() is called by uadmin() to unmount all 30617c478bd9Sstevel@tonic-gate * mounted file systems (except the root file system) during shutdown. 30627c478bd9Sstevel@tonic-gate * It follows the existing locking protocol when traversing the vfs list 30637c478bd9Sstevel@tonic-gate * to sync and unmount vfses. Even though there should be no 30647c478bd9Sstevel@tonic-gate * other thread running while the system is shutting down, it is prudent 30657c478bd9Sstevel@tonic-gate * to still follow the locking protocol. 30667c478bd9Sstevel@tonic-gate */ 30677c478bd9Sstevel@tonic-gate void 30687c478bd9Sstevel@tonic-gate vfs_unmountall(void) 30697c478bd9Sstevel@tonic-gate { 30707c478bd9Sstevel@tonic-gate struct vfs *vfsp; 30717c478bd9Sstevel@tonic-gate struct vfs *prev_vfsp = NULL; 30727c478bd9Sstevel@tonic-gate int error; 30737c478bd9Sstevel@tonic-gate 30747c478bd9Sstevel@tonic-gate /* 30757c478bd9Sstevel@tonic-gate * Toss all dnlc entries now so that the per-vfs sync 30767c478bd9Sstevel@tonic-gate * and unmount operations don't have to slog through 30777c478bd9Sstevel@tonic-gate * a bunch of uninteresting vnodes over and over again. 30787c478bd9Sstevel@tonic-gate */ 30797c478bd9Sstevel@tonic-gate dnlc_purge(); 30807c478bd9Sstevel@tonic-gate 30817c478bd9Sstevel@tonic-gate vfs_list_lock(); 30827c478bd9Sstevel@tonic-gate for (vfsp = rootvfs->vfs_prev; vfsp != rootvfs; vfsp = prev_vfsp) { 30837c478bd9Sstevel@tonic-gate prev_vfsp = vfsp->vfs_prev; 30847c478bd9Sstevel@tonic-gate 30857c478bd9Sstevel@tonic-gate if (vfs_lock(vfsp) != 0) 30867c478bd9Sstevel@tonic-gate continue; 30877c478bd9Sstevel@tonic-gate error = vn_vfswlock(vfsp->vfs_vnodecovered); 30887c478bd9Sstevel@tonic-gate vfs_unlock(vfsp); 30897c478bd9Sstevel@tonic-gate if (error) 30907c478bd9Sstevel@tonic-gate continue; 30917c478bd9Sstevel@tonic-gate 30927c478bd9Sstevel@tonic-gate vfs_list_unlock(); 30937c478bd9Sstevel@tonic-gate 30947c478bd9Sstevel@tonic-gate (void) VFS_SYNC(vfsp, SYNC_CLOSE, CRED()); 30957c478bd9Sstevel@tonic-gate (void) dounmount(vfsp, 0, CRED()); 30967c478bd9Sstevel@tonic-gate 30977c478bd9Sstevel@tonic-gate /* 30987c478bd9Sstevel@tonic-gate * Since we dropped the vfslist lock above we must 30997c478bd9Sstevel@tonic-gate * verify that next_vfsp still exists, else start over. 31007c478bd9Sstevel@tonic-gate */ 31017c478bd9Sstevel@tonic-gate vfs_list_lock(); 31027c478bd9Sstevel@tonic-gate for (vfsp = rootvfs->vfs_prev; 3103b1b8ab34Slling vfsp != rootvfs; vfsp = vfsp->vfs_prev) 31047c478bd9Sstevel@tonic-gate if (vfsp == prev_vfsp) 31057c478bd9Sstevel@tonic-gate break; 31067c478bd9Sstevel@tonic-gate if (vfsp == rootvfs && prev_vfsp != rootvfs) 31077c478bd9Sstevel@tonic-gate prev_vfsp = rootvfs->vfs_prev; 31087c478bd9Sstevel@tonic-gate } 31097c478bd9Sstevel@tonic-gate vfs_list_unlock(); 31107c478bd9Sstevel@tonic-gate } 31117c478bd9Sstevel@tonic-gate 31127c478bd9Sstevel@tonic-gate /* 31137c478bd9Sstevel@tonic-gate * Called to add an entry to the end of the vfs mount in progress list 31147c478bd9Sstevel@tonic-gate */ 31157c478bd9Sstevel@tonic-gate void 31167c478bd9Sstevel@tonic-gate vfs_addmip(dev_t dev, struct vfs *vfsp) 31177c478bd9Sstevel@tonic-gate { 31187c478bd9Sstevel@tonic-gate struct ipmnt *mipp; 31197c478bd9Sstevel@tonic-gate 31207c478bd9Sstevel@tonic-gate mipp = (struct ipmnt *)kmem_alloc(sizeof (struct ipmnt), KM_SLEEP); 31217c478bd9Sstevel@tonic-gate mipp->mip_next = NULL; 31227c478bd9Sstevel@tonic-gate mipp->mip_dev = dev; 31237c478bd9Sstevel@tonic-gate mipp->mip_vfsp = vfsp; 31247c478bd9Sstevel@tonic-gate mutex_enter(&vfs_miplist_mutex); 31257c478bd9Sstevel@tonic-gate if (vfs_miplist_end != NULL) 31267c478bd9Sstevel@tonic-gate vfs_miplist_end->mip_next = mipp; 31277c478bd9Sstevel@tonic-gate else 31287c478bd9Sstevel@tonic-gate vfs_miplist = mipp; 31297c478bd9Sstevel@tonic-gate vfs_miplist_end = mipp; 31307c478bd9Sstevel@tonic-gate mutex_exit(&vfs_miplist_mutex); 31317c478bd9Sstevel@tonic-gate } 31327c478bd9Sstevel@tonic-gate 31337c478bd9Sstevel@tonic-gate /* 31347c478bd9Sstevel@tonic-gate * Called to remove an entry from the mount in progress list 31357c478bd9Sstevel@tonic-gate * Either because the mount completed or it failed. 31367c478bd9Sstevel@tonic-gate */ 31377c478bd9Sstevel@tonic-gate void 31387c478bd9Sstevel@tonic-gate vfs_delmip(struct vfs *vfsp) 31397c478bd9Sstevel@tonic-gate { 31407c478bd9Sstevel@tonic-gate struct ipmnt *mipp, *mipprev; 31417c478bd9Sstevel@tonic-gate 31427c478bd9Sstevel@tonic-gate mutex_enter(&vfs_miplist_mutex); 31437c478bd9Sstevel@tonic-gate mipprev = NULL; 31447c478bd9Sstevel@tonic-gate for (mipp = vfs_miplist; 3145b1b8ab34Slling mipp && mipp->mip_vfsp != vfsp; mipp = mipp->mip_next) { 31467c478bd9Sstevel@tonic-gate mipprev = mipp; 31477c478bd9Sstevel@tonic-gate } 31487c478bd9Sstevel@tonic-gate if (mipp == NULL) 31497c478bd9Sstevel@tonic-gate return; /* shouldn't happen */ 31507c478bd9Sstevel@tonic-gate if (mipp == vfs_miplist_end) 31517c478bd9Sstevel@tonic-gate vfs_miplist_end = mipprev; 31527c478bd9Sstevel@tonic-gate if (mipprev == NULL) 31537c478bd9Sstevel@tonic-gate vfs_miplist = mipp->mip_next; 31547c478bd9Sstevel@tonic-gate else 31557c478bd9Sstevel@tonic-gate mipprev->mip_next = mipp->mip_next; 31567c478bd9Sstevel@tonic-gate mutex_exit(&vfs_miplist_mutex); 31577c478bd9Sstevel@tonic-gate kmem_free(mipp, sizeof (struct ipmnt)); 31587c478bd9Sstevel@tonic-gate } 31597c478bd9Sstevel@tonic-gate 31607c478bd9Sstevel@tonic-gate /* 31617c478bd9Sstevel@tonic-gate * vfs_add is called by a specific filesystem's mount routine to add 31627c478bd9Sstevel@tonic-gate * the new vfs into the vfs list/hash and to cover the mounted-on vnode. 31637c478bd9Sstevel@tonic-gate * The vfs should already have been locked by the caller. 31647c478bd9Sstevel@tonic-gate * 31657c478bd9Sstevel@tonic-gate * coveredvp is NULL if this is the root. 31667c478bd9Sstevel@tonic-gate */ 31677c478bd9Sstevel@tonic-gate void 31687c478bd9Sstevel@tonic-gate vfs_add(vnode_t *coveredvp, struct vfs *vfsp, int mflag) 31697c478bd9Sstevel@tonic-gate { 31707c478bd9Sstevel@tonic-gate int newflag; 31717c478bd9Sstevel@tonic-gate 31727c478bd9Sstevel@tonic-gate ASSERT(vfs_lock_held(vfsp)); 31737c478bd9Sstevel@tonic-gate VFS_HOLD(vfsp); 31747c478bd9Sstevel@tonic-gate newflag = vfsp->vfs_flag; 31757c478bd9Sstevel@tonic-gate if (mflag & MS_RDONLY) 31767c478bd9Sstevel@tonic-gate newflag |= VFS_RDONLY; 31777c478bd9Sstevel@tonic-gate else 31787c478bd9Sstevel@tonic-gate newflag &= ~VFS_RDONLY; 31797c478bd9Sstevel@tonic-gate if (mflag & MS_NOSUID) 31807c478bd9Sstevel@tonic-gate newflag |= (VFS_NOSETUID|VFS_NODEVICES); 31817c478bd9Sstevel@tonic-gate else 31827c478bd9Sstevel@tonic-gate newflag &= ~(VFS_NOSETUID|VFS_NODEVICES); 31837c478bd9Sstevel@tonic-gate if (mflag & MS_NOMNTTAB) 31847c478bd9Sstevel@tonic-gate newflag |= VFS_NOMNTTAB; 31857c478bd9Sstevel@tonic-gate else 31867c478bd9Sstevel@tonic-gate newflag &= ~VFS_NOMNTTAB; 31877c478bd9Sstevel@tonic-gate 31887c478bd9Sstevel@tonic-gate if (coveredvp != NULL) { 31897c478bd9Sstevel@tonic-gate ASSERT(vn_vfswlock_held(coveredvp)); 31907c478bd9Sstevel@tonic-gate coveredvp->v_vfsmountedhere = vfsp; 31917c478bd9Sstevel@tonic-gate VN_HOLD(coveredvp); 31927c478bd9Sstevel@tonic-gate } 31937c478bd9Sstevel@tonic-gate vfsp->vfs_vnodecovered = coveredvp; 31947c478bd9Sstevel@tonic-gate vfsp->vfs_flag = newflag; 31957c478bd9Sstevel@tonic-gate 31967c478bd9Sstevel@tonic-gate vfs_list_add(vfsp); 31977c478bd9Sstevel@tonic-gate } 31987c478bd9Sstevel@tonic-gate 31997c478bd9Sstevel@tonic-gate /* 32007c478bd9Sstevel@tonic-gate * Remove a vfs from the vfs list, null out the pointer from the 32017c478bd9Sstevel@tonic-gate * covered vnode to the vfs (v_vfsmountedhere), and null out the pointer 32027c478bd9Sstevel@tonic-gate * from the vfs to the covered vnode (vfs_vnodecovered). Release the 32037c478bd9Sstevel@tonic-gate * reference to the vfs and to the covered vnode. 32047c478bd9Sstevel@tonic-gate * 32057c478bd9Sstevel@tonic-gate * Called from dounmount after it's confirmed with the file system 32067c478bd9Sstevel@tonic-gate * that the unmount is legal. 32077c478bd9Sstevel@tonic-gate */ 32087c478bd9Sstevel@tonic-gate void 32097c478bd9Sstevel@tonic-gate vfs_remove(struct vfs *vfsp) 32107c478bd9Sstevel@tonic-gate { 32117c478bd9Sstevel@tonic-gate vnode_t *vp; 32127c478bd9Sstevel@tonic-gate 32137c478bd9Sstevel@tonic-gate ASSERT(vfs_lock_held(vfsp)); 32147c478bd9Sstevel@tonic-gate 32157c478bd9Sstevel@tonic-gate /* 32167c478bd9Sstevel@tonic-gate * Can't unmount root. Should never happen because fs will 32177c478bd9Sstevel@tonic-gate * be busy. 32187c478bd9Sstevel@tonic-gate */ 32197c478bd9Sstevel@tonic-gate if (vfsp == rootvfs) 3220ae115bc7Smrj panic("vfs_remove: unmounting root"); 32217c478bd9Sstevel@tonic-gate 32227c478bd9Sstevel@tonic-gate vfs_list_remove(vfsp); 32237c478bd9Sstevel@tonic-gate 32247c478bd9Sstevel@tonic-gate /* 32257c478bd9Sstevel@tonic-gate * Unhook from the file system name space. 32267c478bd9Sstevel@tonic-gate */ 32277c478bd9Sstevel@tonic-gate vp = vfsp->vfs_vnodecovered; 32287c478bd9Sstevel@tonic-gate ASSERT(vn_vfswlock_held(vp)); 32297c478bd9Sstevel@tonic-gate vp->v_vfsmountedhere = NULL; 32307c478bd9Sstevel@tonic-gate vfsp->vfs_vnodecovered = NULL; 32317c478bd9Sstevel@tonic-gate VN_RELE(vp); 32327c478bd9Sstevel@tonic-gate 32337c478bd9Sstevel@tonic-gate /* 32347c478bd9Sstevel@tonic-gate * Release lock and wakeup anybody waiting. 32357c478bd9Sstevel@tonic-gate */ 32367c478bd9Sstevel@tonic-gate vfs_unlock(vfsp); 32377c478bd9Sstevel@tonic-gate VFS_RELE(vfsp); 32387c478bd9Sstevel@tonic-gate } 32397c478bd9Sstevel@tonic-gate 32407c478bd9Sstevel@tonic-gate /* 32417c478bd9Sstevel@tonic-gate * Lock a filesystem to prevent access to it while mounting, 32427c478bd9Sstevel@tonic-gate * unmounting and syncing. Return EBUSY immediately if lock 32437c478bd9Sstevel@tonic-gate * can't be acquired. 32447c478bd9Sstevel@tonic-gate */ 32457c478bd9Sstevel@tonic-gate int 32467c478bd9Sstevel@tonic-gate vfs_lock(vfs_t *vfsp) 32477c478bd9Sstevel@tonic-gate { 32487c478bd9Sstevel@tonic-gate vn_vfslocks_entry_t *vpvfsentry; 32497c478bd9Sstevel@tonic-gate 32507c478bd9Sstevel@tonic-gate vpvfsentry = vn_vfslocks_getlock(vfsp); 32517c478bd9Sstevel@tonic-gate if (rwst_tryenter(&vpvfsentry->ve_lock, RW_WRITER)) 32527c478bd9Sstevel@tonic-gate return (0); 32537c478bd9Sstevel@tonic-gate 32547c478bd9Sstevel@tonic-gate vn_vfslocks_rele(vpvfsentry); 32557c478bd9Sstevel@tonic-gate return (EBUSY); 32567c478bd9Sstevel@tonic-gate } 32577c478bd9Sstevel@tonic-gate 32587c478bd9Sstevel@tonic-gate int 32597c478bd9Sstevel@tonic-gate vfs_rlock(vfs_t *vfsp) 32607c478bd9Sstevel@tonic-gate { 32617c478bd9Sstevel@tonic-gate vn_vfslocks_entry_t *vpvfsentry; 32627c478bd9Sstevel@tonic-gate 32637c478bd9Sstevel@tonic-gate vpvfsentry = vn_vfslocks_getlock(vfsp); 32647c478bd9Sstevel@tonic-gate 32657c478bd9Sstevel@tonic-gate if (rwst_tryenter(&vpvfsentry->ve_lock, RW_READER)) 32667c478bd9Sstevel@tonic-gate return (0); 32677c478bd9Sstevel@tonic-gate 32687c478bd9Sstevel@tonic-gate vn_vfslocks_rele(vpvfsentry); 32697c478bd9Sstevel@tonic-gate return (EBUSY); 32707c478bd9Sstevel@tonic-gate } 32717c478bd9Sstevel@tonic-gate 32727c478bd9Sstevel@tonic-gate void 32737c478bd9Sstevel@tonic-gate vfs_lock_wait(vfs_t *vfsp) 32747c478bd9Sstevel@tonic-gate { 32757c478bd9Sstevel@tonic-gate vn_vfslocks_entry_t *vpvfsentry; 32767c478bd9Sstevel@tonic-gate 32777c478bd9Sstevel@tonic-gate vpvfsentry = vn_vfslocks_getlock(vfsp); 32787c478bd9Sstevel@tonic-gate rwst_enter(&vpvfsentry->ve_lock, RW_WRITER); 32797c478bd9Sstevel@tonic-gate } 32807c478bd9Sstevel@tonic-gate 32817c478bd9Sstevel@tonic-gate void 32827c478bd9Sstevel@tonic-gate vfs_rlock_wait(vfs_t *vfsp) 32837c478bd9Sstevel@tonic-gate { 32847c478bd9Sstevel@tonic-gate vn_vfslocks_entry_t *vpvfsentry; 32857c478bd9Sstevel@tonic-gate 32867c478bd9Sstevel@tonic-gate vpvfsentry = vn_vfslocks_getlock(vfsp); 32877c478bd9Sstevel@tonic-gate rwst_enter(&vpvfsentry->ve_lock, RW_READER); 32887c478bd9Sstevel@tonic-gate } 32897c478bd9Sstevel@tonic-gate 32907c478bd9Sstevel@tonic-gate /* 32917c478bd9Sstevel@tonic-gate * Unlock a locked filesystem. 32927c478bd9Sstevel@tonic-gate */ 32937c478bd9Sstevel@tonic-gate void 32947c478bd9Sstevel@tonic-gate vfs_unlock(vfs_t *vfsp) 32957c478bd9Sstevel@tonic-gate { 32967c478bd9Sstevel@tonic-gate vn_vfslocks_entry_t *vpvfsentry; 32977c478bd9Sstevel@tonic-gate 32987c478bd9Sstevel@tonic-gate /* 32997c478bd9Sstevel@tonic-gate * vfs_unlock will mimic sema_v behaviour to fix 4748018. 33007c478bd9Sstevel@tonic-gate * And these changes should remain for the patch changes as it is. 33017c478bd9Sstevel@tonic-gate */ 33027c478bd9Sstevel@tonic-gate if (panicstr) 33037c478bd9Sstevel@tonic-gate return; 33047c478bd9Sstevel@tonic-gate 33057c478bd9Sstevel@tonic-gate /* 33067c478bd9Sstevel@tonic-gate * ve_refcount needs to be dropped twice here. 33077c478bd9Sstevel@tonic-gate * 1. To release refernce after a call to vfs_locks_getlock() 33087c478bd9Sstevel@tonic-gate * 2. To release the reference from the locking routines like 33097c478bd9Sstevel@tonic-gate * vfs_rlock_wait/vfs_wlock_wait/vfs_wlock etc,. 33107c478bd9Sstevel@tonic-gate */ 33117c478bd9Sstevel@tonic-gate 33127c478bd9Sstevel@tonic-gate vpvfsentry = vn_vfslocks_getlock(vfsp); 33137c478bd9Sstevel@tonic-gate vn_vfslocks_rele(vpvfsentry); 33147c478bd9Sstevel@tonic-gate 33157c478bd9Sstevel@tonic-gate rwst_exit(&vpvfsentry->ve_lock); 33167c478bd9Sstevel@tonic-gate vn_vfslocks_rele(vpvfsentry); 33177c478bd9Sstevel@tonic-gate } 33187c478bd9Sstevel@tonic-gate 33197c478bd9Sstevel@tonic-gate /* 33207c478bd9Sstevel@tonic-gate * Utility routine that allows a filesystem to construct its 33217c478bd9Sstevel@tonic-gate * fsid in "the usual way" - by munging some underlying dev_t and 33227c478bd9Sstevel@tonic-gate * the filesystem type number into the 64-bit fsid. Note that 33237c478bd9Sstevel@tonic-gate * this implicitly relies on dev_t persistence to make filesystem 33247c478bd9Sstevel@tonic-gate * id's persistent. 33257c478bd9Sstevel@tonic-gate * 33267c478bd9Sstevel@tonic-gate * There's nothing to prevent an individual fs from constructing its 33277c478bd9Sstevel@tonic-gate * fsid in a different way, and indeed they should. 33287c478bd9Sstevel@tonic-gate * 33297c478bd9Sstevel@tonic-gate * Since we want fsids to be 32-bit quantities (so that they can be 33307c478bd9Sstevel@tonic-gate * exported identically by either 32-bit or 64-bit APIs, as well as 33317c478bd9Sstevel@tonic-gate * the fact that fsid's are "known" to NFS), we compress the device 33327c478bd9Sstevel@tonic-gate * number given down to 32-bits, and panic if that isn't possible. 33337c478bd9Sstevel@tonic-gate */ 33347c478bd9Sstevel@tonic-gate void 33357c478bd9Sstevel@tonic-gate vfs_make_fsid(fsid_t *fsi, dev_t dev, int val) 33367c478bd9Sstevel@tonic-gate { 33377c478bd9Sstevel@tonic-gate if (!cmpldev((dev32_t *)&fsi->val[0], dev)) 33387c478bd9Sstevel@tonic-gate panic("device number too big for fsid!"); 33397c478bd9Sstevel@tonic-gate fsi->val[1] = val; 33407c478bd9Sstevel@tonic-gate } 33417c478bd9Sstevel@tonic-gate 33427c478bd9Sstevel@tonic-gate int 33437c478bd9Sstevel@tonic-gate vfs_lock_held(vfs_t *vfsp) 33447c478bd9Sstevel@tonic-gate { 33457c478bd9Sstevel@tonic-gate int held; 33467c478bd9Sstevel@tonic-gate vn_vfslocks_entry_t *vpvfsentry; 33477c478bd9Sstevel@tonic-gate 33487c478bd9Sstevel@tonic-gate /* 33497c478bd9Sstevel@tonic-gate * vfs_lock_held will mimic sema_held behaviour 33507c478bd9Sstevel@tonic-gate * if panicstr is set. And these changes should remain 33517c478bd9Sstevel@tonic-gate * for the patch changes as it is. 33527c478bd9Sstevel@tonic-gate */ 33537c478bd9Sstevel@tonic-gate if (panicstr) 33547c478bd9Sstevel@tonic-gate return (1); 33557c478bd9Sstevel@tonic-gate 33567c478bd9Sstevel@tonic-gate vpvfsentry = vn_vfslocks_getlock(vfsp); 33577c478bd9Sstevel@tonic-gate held = rwst_lock_held(&vpvfsentry->ve_lock, RW_WRITER); 33587c478bd9Sstevel@tonic-gate 33597c478bd9Sstevel@tonic-gate vn_vfslocks_rele(vpvfsentry); 33607c478bd9Sstevel@tonic-gate return (held); 33617c478bd9Sstevel@tonic-gate } 33627c478bd9Sstevel@tonic-gate 33637c478bd9Sstevel@tonic-gate struct _kthread * 33647c478bd9Sstevel@tonic-gate vfs_lock_owner(vfs_t *vfsp) 33657c478bd9Sstevel@tonic-gate { 33667c478bd9Sstevel@tonic-gate struct _kthread *owner; 33677c478bd9Sstevel@tonic-gate vn_vfslocks_entry_t *vpvfsentry; 33687c478bd9Sstevel@tonic-gate 33697c478bd9Sstevel@tonic-gate /* 33707c478bd9Sstevel@tonic-gate * vfs_wlock_held will mimic sema_held behaviour 33717c478bd9Sstevel@tonic-gate * if panicstr is set. And these changes should remain 33727c478bd9Sstevel@tonic-gate * for the patch changes as it is. 33737c478bd9Sstevel@tonic-gate */ 33747c478bd9Sstevel@tonic-gate if (panicstr) 33757c478bd9Sstevel@tonic-gate return (NULL); 33767c478bd9Sstevel@tonic-gate 33777c478bd9Sstevel@tonic-gate vpvfsentry = vn_vfslocks_getlock(vfsp); 33787c478bd9Sstevel@tonic-gate owner = rwst_owner(&vpvfsentry->ve_lock); 33797c478bd9Sstevel@tonic-gate 33807c478bd9Sstevel@tonic-gate vn_vfslocks_rele(vpvfsentry); 33817c478bd9Sstevel@tonic-gate return (owner); 33827c478bd9Sstevel@tonic-gate } 33837c478bd9Sstevel@tonic-gate 33847c478bd9Sstevel@tonic-gate /* 33857c478bd9Sstevel@tonic-gate * vfs list locking. 33867c478bd9Sstevel@tonic-gate * 33877c478bd9Sstevel@tonic-gate * Rather than manipulate the vfslist lock directly, we abstract into lock 33887c478bd9Sstevel@tonic-gate * and unlock routines to allow the locking implementation to be changed for 33897c478bd9Sstevel@tonic-gate * clustering. 33907c478bd9Sstevel@tonic-gate * 33917c478bd9Sstevel@tonic-gate * Whenever the vfs list is modified through its hash links, the overall list 33927c478bd9Sstevel@tonic-gate * lock must be obtained before locking the relevant hash bucket. But to see 33937c478bd9Sstevel@tonic-gate * whether a given vfs is on the list, it suffices to obtain the lock for the 33947c478bd9Sstevel@tonic-gate * hash bucket without getting the overall list lock. (See getvfs() below.) 33957c478bd9Sstevel@tonic-gate */ 33967c478bd9Sstevel@tonic-gate 33977c478bd9Sstevel@tonic-gate void 33987c478bd9Sstevel@tonic-gate vfs_list_lock() 33997c478bd9Sstevel@tonic-gate { 34007c478bd9Sstevel@tonic-gate rw_enter(&vfslist, RW_WRITER); 34017c478bd9Sstevel@tonic-gate } 34027c478bd9Sstevel@tonic-gate 34037c478bd9Sstevel@tonic-gate void 34047c478bd9Sstevel@tonic-gate vfs_list_read_lock() 34057c478bd9Sstevel@tonic-gate { 34067c478bd9Sstevel@tonic-gate rw_enter(&vfslist, RW_READER); 34077c478bd9Sstevel@tonic-gate } 34087c478bd9Sstevel@tonic-gate 34097c478bd9Sstevel@tonic-gate void 34107c478bd9Sstevel@tonic-gate vfs_list_unlock() 34117c478bd9Sstevel@tonic-gate { 34127c478bd9Sstevel@tonic-gate rw_exit(&vfslist); 34137c478bd9Sstevel@tonic-gate } 34147c478bd9Sstevel@tonic-gate 34157c478bd9Sstevel@tonic-gate /* 34167c478bd9Sstevel@tonic-gate * Low level worker routines for adding entries to and removing entries from 34177c478bd9Sstevel@tonic-gate * the vfs list. 34187c478bd9Sstevel@tonic-gate */ 34197c478bd9Sstevel@tonic-gate 34207c478bd9Sstevel@tonic-gate static void 34217c478bd9Sstevel@tonic-gate vfs_hash_add(struct vfs *vfsp, int insert_at_head) 34227c478bd9Sstevel@tonic-gate { 34237c478bd9Sstevel@tonic-gate int vhno; 34247c478bd9Sstevel@tonic-gate struct vfs **hp; 34257c478bd9Sstevel@tonic-gate dev_t dev; 34267c478bd9Sstevel@tonic-gate 34277c478bd9Sstevel@tonic-gate ASSERT(RW_WRITE_HELD(&vfslist)); 34287c478bd9Sstevel@tonic-gate 34297c478bd9Sstevel@tonic-gate dev = expldev(vfsp->vfs_fsid.val[0]); 34307c478bd9Sstevel@tonic-gate vhno = VFSHASH(getmajor(dev), getminor(dev)); 34317c478bd9Sstevel@tonic-gate 34327c478bd9Sstevel@tonic-gate mutex_enter(&rvfs_list[vhno].rvfs_lock); 34337c478bd9Sstevel@tonic-gate 34347c478bd9Sstevel@tonic-gate /* 34357c478bd9Sstevel@tonic-gate * Link into the hash table, inserting it at the end, so that LOFS 34367c478bd9Sstevel@tonic-gate * with the same fsid as UFS (or other) file systems will not hide the 34377c478bd9Sstevel@tonic-gate * UFS. 34387c478bd9Sstevel@tonic-gate */ 34397c478bd9Sstevel@tonic-gate if (insert_at_head) { 34407c478bd9Sstevel@tonic-gate vfsp->vfs_hash = rvfs_list[vhno].rvfs_head; 34417c478bd9Sstevel@tonic-gate rvfs_list[vhno].rvfs_head = vfsp; 34427c478bd9Sstevel@tonic-gate } else { 34437c478bd9Sstevel@tonic-gate for (hp = &rvfs_list[vhno].rvfs_head; *hp != NULL; 34447c478bd9Sstevel@tonic-gate hp = &(*hp)->vfs_hash) 34457c478bd9Sstevel@tonic-gate continue; 34467c478bd9Sstevel@tonic-gate /* 34477c478bd9Sstevel@tonic-gate * hp now contains the address of the pointer to update 34487c478bd9Sstevel@tonic-gate * to effect the insertion. 34497c478bd9Sstevel@tonic-gate */ 34507c478bd9Sstevel@tonic-gate vfsp->vfs_hash = NULL; 34517c478bd9Sstevel@tonic-gate *hp = vfsp; 34527c478bd9Sstevel@tonic-gate } 34537c478bd9Sstevel@tonic-gate 34547c478bd9Sstevel@tonic-gate rvfs_list[vhno].rvfs_len++; 34557c478bd9Sstevel@tonic-gate mutex_exit(&rvfs_list[vhno].rvfs_lock); 34567c478bd9Sstevel@tonic-gate } 34577c478bd9Sstevel@tonic-gate 34587c478bd9Sstevel@tonic-gate 34597c478bd9Sstevel@tonic-gate static void 34607c478bd9Sstevel@tonic-gate vfs_hash_remove(struct vfs *vfsp) 34617c478bd9Sstevel@tonic-gate { 34627c478bd9Sstevel@tonic-gate int vhno; 34637c478bd9Sstevel@tonic-gate struct vfs *tvfsp; 34647c478bd9Sstevel@tonic-gate dev_t dev; 34657c478bd9Sstevel@tonic-gate 34667c478bd9Sstevel@tonic-gate ASSERT(RW_WRITE_HELD(&vfslist)); 34677c478bd9Sstevel@tonic-gate 34687c478bd9Sstevel@tonic-gate dev = expldev(vfsp->vfs_fsid.val[0]); 34697c478bd9Sstevel@tonic-gate vhno = VFSHASH(getmajor(dev), getminor(dev)); 34707c478bd9Sstevel@tonic-gate 34717c478bd9Sstevel@tonic-gate mutex_enter(&rvfs_list[vhno].rvfs_lock); 34727c478bd9Sstevel@tonic-gate 34737c478bd9Sstevel@tonic-gate /* 34747c478bd9Sstevel@tonic-gate * Remove from hash. 34757c478bd9Sstevel@tonic-gate */ 34767c478bd9Sstevel@tonic-gate if (rvfs_list[vhno].rvfs_head == vfsp) { 34777c478bd9Sstevel@tonic-gate rvfs_list[vhno].rvfs_head = vfsp->vfs_hash; 34787c478bd9Sstevel@tonic-gate rvfs_list[vhno].rvfs_len--; 34797c478bd9Sstevel@tonic-gate goto foundit; 34807c478bd9Sstevel@tonic-gate } 34817c478bd9Sstevel@tonic-gate for (tvfsp = rvfs_list[vhno].rvfs_head; tvfsp != NULL; 34827c478bd9Sstevel@tonic-gate tvfsp = tvfsp->vfs_hash) { 34837c478bd9Sstevel@tonic-gate if (tvfsp->vfs_hash == vfsp) { 34847c478bd9Sstevel@tonic-gate tvfsp->vfs_hash = vfsp->vfs_hash; 34857c478bd9Sstevel@tonic-gate rvfs_list[vhno].rvfs_len--; 34867c478bd9Sstevel@tonic-gate goto foundit; 34877c478bd9Sstevel@tonic-gate } 34887c478bd9Sstevel@tonic-gate } 34897c478bd9Sstevel@tonic-gate cmn_err(CE_WARN, "vfs_list_remove: vfs not found in hash"); 34907c478bd9Sstevel@tonic-gate 34917c478bd9Sstevel@tonic-gate foundit: 34927c478bd9Sstevel@tonic-gate 34937c478bd9Sstevel@tonic-gate mutex_exit(&rvfs_list[vhno].rvfs_lock); 34947c478bd9Sstevel@tonic-gate } 34957c478bd9Sstevel@tonic-gate 34967c478bd9Sstevel@tonic-gate 34977c478bd9Sstevel@tonic-gate void 34987c478bd9Sstevel@tonic-gate vfs_list_add(struct vfs *vfsp) 34997c478bd9Sstevel@tonic-gate { 35007c478bd9Sstevel@tonic-gate zone_t *zone; 35017c478bd9Sstevel@tonic-gate 3502835ee219SRobert Harris /* 3503835ee219SRobert Harris * Typically, the vfs_t will have been created on behalf of the file 3504835ee219SRobert Harris * system in vfs_init, where it will have been provided with a 3505835ee219SRobert Harris * vfs_impl_t. This, however, might be lacking if the vfs_t was created 3506835ee219SRobert Harris * by an unbundled file system. We therefore check for such an example 3507835ee219SRobert Harris * before stamping the vfs_t with its creation time for the benefit of 3508835ee219SRobert Harris * mntfs. 3509835ee219SRobert Harris */ 3510835ee219SRobert Harris if (vfsp->vfs_implp == NULL) 3511835ee219SRobert Harris vfsimpl_setup(vfsp); 3512835ee219SRobert Harris vfs_mono_time(&vfsp->vfs_hrctime); 3513835ee219SRobert Harris 35147c478bd9Sstevel@tonic-gate /* 35157c478bd9Sstevel@tonic-gate * The zone that owns the mount is the one that performed the mount. 35167c478bd9Sstevel@tonic-gate * Note that this isn't necessarily the same as the zone mounted into. 3517a19609f8Sjv * The corresponding zone_rele_ref() will be done when the vfs_t 3518a19609f8Sjv * is being free'd. 35197c478bd9Sstevel@tonic-gate */ 35207c478bd9Sstevel@tonic-gate vfsp->vfs_zone = curproc->p_zone; 3521a19609f8Sjv zone_init_ref(&vfsp->vfs_implp->vi_zone_ref); 3522a19609f8Sjv zone_hold_ref(vfsp->vfs_zone, &vfsp->vfs_implp->vi_zone_ref, 3523a19609f8Sjv ZONE_REF_VFS); 35247c478bd9Sstevel@tonic-gate 35257c478bd9Sstevel@tonic-gate /* 35267c478bd9Sstevel@tonic-gate * Find the zone mounted into, and put this mount on its vfs list. 35277c478bd9Sstevel@tonic-gate */ 35287c478bd9Sstevel@tonic-gate zone = zone_find_by_path(refstr_value(vfsp->vfs_mntpt)); 35297c478bd9Sstevel@tonic-gate ASSERT(zone != NULL); 35307c478bd9Sstevel@tonic-gate /* 35317c478bd9Sstevel@tonic-gate * Special casing for the root vfs. This structure is allocated 35327c478bd9Sstevel@tonic-gate * statically and hooked onto rootvfs at link time. During the 35337c478bd9Sstevel@tonic-gate * vfs_mountroot call at system startup time, the root file system's 35347c478bd9Sstevel@tonic-gate * VFS_MOUNTROOT routine will call vfs_add with this root vfs struct 35357c478bd9Sstevel@tonic-gate * as argument. The code below must detect and handle this special 35367c478bd9Sstevel@tonic-gate * case. The only apparent justification for this special casing is 35377c478bd9Sstevel@tonic-gate * to ensure that the root file system appears at the head of the 35387c478bd9Sstevel@tonic-gate * list. 35397c478bd9Sstevel@tonic-gate * 35407c478bd9Sstevel@tonic-gate * XXX: I'm assuming that it's ok to do normal list locking when 35417c478bd9Sstevel@tonic-gate * adding the entry for the root file system (this used to be 35427c478bd9Sstevel@tonic-gate * done with no locks held). 35437c478bd9Sstevel@tonic-gate */ 35447c478bd9Sstevel@tonic-gate vfs_list_lock(); 35457c478bd9Sstevel@tonic-gate /* 35467c478bd9Sstevel@tonic-gate * Link into the vfs list proper. 35477c478bd9Sstevel@tonic-gate */ 35487c478bd9Sstevel@tonic-gate if (vfsp == &root) { 35497c478bd9Sstevel@tonic-gate /* 35507c478bd9Sstevel@tonic-gate * Assert: This vfs is already on the list as its first entry. 35517c478bd9Sstevel@tonic-gate * Thus, there's nothing to do. 35527c478bd9Sstevel@tonic-gate */ 35537c478bd9Sstevel@tonic-gate ASSERT(rootvfs == vfsp); 35547c478bd9Sstevel@tonic-gate /* 35557c478bd9Sstevel@tonic-gate * Add it to the head of the global zone's vfslist. 35567c478bd9Sstevel@tonic-gate */ 35577c478bd9Sstevel@tonic-gate ASSERT(zone == global_zone); 35587c478bd9Sstevel@tonic-gate ASSERT(zone->zone_vfslist == NULL); 35597c478bd9Sstevel@tonic-gate zone->zone_vfslist = vfsp; 35607c478bd9Sstevel@tonic-gate } else { 35617c478bd9Sstevel@tonic-gate /* 35627c478bd9Sstevel@tonic-gate * Link to end of list using vfs_prev (as rootvfs is now a 35637c478bd9Sstevel@tonic-gate * doubly linked circular list) so list is in mount order for 35647c478bd9Sstevel@tonic-gate * mnttab use. 35657c478bd9Sstevel@tonic-gate */ 35667c478bd9Sstevel@tonic-gate rootvfs->vfs_prev->vfs_next = vfsp; 35677c478bd9Sstevel@tonic-gate vfsp->vfs_prev = rootvfs->vfs_prev; 35687c478bd9Sstevel@tonic-gate rootvfs->vfs_prev = vfsp; 35697c478bd9Sstevel@tonic-gate vfsp->vfs_next = rootvfs; 35707c478bd9Sstevel@tonic-gate 35717c478bd9Sstevel@tonic-gate /* 35727c478bd9Sstevel@tonic-gate * Do it again for the zone-private list (which may be NULL). 35737c478bd9Sstevel@tonic-gate */ 35747c478bd9Sstevel@tonic-gate if (zone->zone_vfslist == NULL) { 35757c478bd9Sstevel@tonic-gate ASSERT(zone != global_zone); 35767c478bd9Sstevel@tonic-gate zone->zone_vfslist = vfsp; 35777c478bd9Sstevel@tonic-gate } else { 35787c478bd9Sstevel@tonic-gate zone->zone_vfslist->vfs_zone_prev->vfs_zone_next = vfsp; 35797c478bd9Sstevel@tonic-gate vfsp->vfs_zone_prev = zone->zone_vfslist->vfs_zone_prev; 35807c478bd9Sstevel@tonic-gate zone->zone_vfslist->vfs_zone_prev = vfsp; 35817c478bd9Sstevel@tonic-gate vfsp->vfs_zone_next = zone->zone_vfslist; 35827c478bd9Sstevel@tonic-gate } 35837c478bd9Sstevel@tonic-gate } 35847c478bd9Sstevel@tonic-gate 35857c478bd9Sstevel@tonic-gate /* 35867c478bd9Sstevel@tonic-gate * Link into the hash table, inserting it at the end, so that LOFS 35877c478bd9Sstevel@tonic-gate * with the same fsid as UFS (or other) file systems will not hide 35887c478bd9Sstevel@tonic-gate * the UFS. 35897c478bd9Sstevel@tonic-gate */ 35907c478bd9Sstevel@tonic-gate vfs_hash_add(vfsp, 0); 35917c478bd9Sstevel@tonic-gate 35927c478bd9Sstevel@tonic-gate /* 35937c478bd9Sstevel@tonic-gate * update the mnttab modification time 35947c478bd9Sstevel@tonic-gate */ 35957c478bd9Sstevel@tonic-gate vfs_mnttab_modtimeupd(); 35967c478bd9Sstevel@tonic-gate vfs_list_unlock(); 35977c478bd9Sstevel@tonic-gate zone_rele(zone); 35987c478bd9Sstevel@tonic-gate } 35997c478bd9Sstevel@tonic-gate 36007c478bd9Sstevel@tonic-gate void 36017c478bd9Sstevel@tonic-gate vfs_list_remove(struct vfs *vfsp) 36027c478bd9Sstevel@tonic-gate { 36037c478bd9Sstevel@tonic-gate zone_t *zone; 36047c478bd9Sstevel@tonic-gate 36057c478bd9Sstevel@tonic-gate zone = zone_find_by_path(refstr_value(vfsp->vfs_mntpt)); 36067c478bd9Sstevel@tonic-gate ASSERT(zone != NULL); 36077c478bd9Sstevel@tonic-gate /* 36087c478bd9Sstevel@tonic-gate * Callers are responsible for preventing attempts to unmount the 36097c478bd9Sstevel@tonic-gate * root. 36107c478bd9Sstevel@tonic-gate */ 36117c478bd9Sstevel@tonic-gate ASSERT(vfsp != rootvfs); 36127c478bd9Sstevel@tonic-gate 36137c478bd9Sstevel@tonic-gate vfs_list_lock(); 36147c478bd9Sstevel@tonic-gate 36157c478bd9Sstevel@tonic-gate /* 36167c478bd9Sstevel@tonic-gate * Remove from hash. 36177c478bd9Sstevel@tonic-gate */ 36187c478bd9Sstevel@tonic-gate vfs_hash_remove(vfsp); 36197c478bd9Sstevel@tonic-gate 36207c478bd9Sstevel@tonic-gate /* 36217c478bd9Sstevel@tonic-gate * Remove from vfs list. 36227c478bd9Sstevel@tonic-gate */ 36237c478bd9Sstevel@tonic-gate vfsp->vfs_prev->vfs_next = vfsp->vfs_next; 36247c478bd9Sstevel@tonic-gate vfsp->vfs_next->vfs_prev = vfsp->vfs_prev; 36257c478bd9Sstevel@tonic-gate vfsp->vfs_next = vfsp->vfs_prev = NULL; 36267c478bd9Sstevel@tonic-gate 36277c478bd9Sstevel@tonic-gate /* 36287c478bd9Sstevel@tonic-gate * Remove from zone-specific vfs list. 36297c478bd9Sstevel@tonic-gate */ 36307c478bd9Sstevel@tonic-gate if (zone->zone_vfslist == vfsp) 36317c478bd9Sstevel@tonic-gate zone->zone_vfslist = vfsp->vfs_zone_next; 36327c478bd9Sstevel@tonic-gate 36337c478bd9Sstevel@tonic-gate if (vfsp->vfs_zone_next == vfsp) { 36347c478bd9Sstevel@tonic-gate ASSERT(vfsp->vfs_zone_prev == vfsp); 36357c478bd9Sstevel@tonic-gate ASSERT(zone->zone_vfslist == vfsp); 36367c478bd9Sstevel@tonic-gate zone->zone_vfslist = NULL; 36377c478bd9Sstevel@tonic-gate } 36387c478bd9Sstevel@tonic-gate 36397c478bd9Sstevel@tonic-gate vfsp->vfs_zone_prev->vfs_zone_next = vfsp->vfs_zone_next; 36407c478bd9Sstevel@tonic-gate vfsp->vfs_zone_next->vfs_zone_prev = vfsp->vfs_zone_prev; 36417c478bd9Sstevel@tonic-gate vfsp->vfs_zone_next = vfsp->vfs_zone_prev = NULL; 36427c478bd9Sstevel@tonic-gate 36437c478bd9Sstevel@tonic-gate /* 36447c478bd9Sstevel@tonic-gate * update the mnttab modification time 36457c478bd9Sstevel@tonic-gate */ 36467c478bd9Sstevel@tonic-gate vfs_mnttab_modtimeupd(); 36477c478bd9Sstevel@tonic-gate vfs_list_unlock(); 36487c478bd9Sstevel@tonic-gate zone_rele(zone); 36497c478bd9Sstevel@tonic-gate } 36507c478bd9Sstevel@tonic-gate 36517c478bd9Sstevel@tonic-gate struct vfs * 36527c478bd9Sstevel@tonic-gate getvfs(fsid_t *fsid) 36537c478bd9Sstevel@tonic-gate { 36547c478bd9Sstevel@tonic-gate struct vfs *vfsp; 36557c478bd9Sstevel@tonic-gate int val0 = fsid->val[0]; 36567c478bd9Sstevel@tonic-gate int val1 = fsid->val[1]; 36577c478bd9Sstevel@tonic-gate dev_t dev = expldev(val0); 36587c478bd9Sstevel@tonic-gate int vhno = VFSHASH(getmajor(dev), getminor(dev)); 36597c478bd9Sstevel@tonic-gate kmutex_t *hmp = &rvfs_list[vhno].rvfs_lock; 36607c478bd9Sstevel@tonic-gate 36617c478bd9Sstevel@tonic-gate mutex_enter(hmp); 36627c478bd9Sstevel@tonic-gate for (vfsp = rvfs_list[vhno].rvfs_head; vfsp; vfsp = vfsp->vfs_hash) { 36637c478bd9Sstevel@tonic-gate if (vfsp->vfs_fsid.val[0] == val0 && 36647c478bd9Sstevel@tonic-gate vfsp->vfs_fsid.val[1] == val1) { 36657c478bd9Sstevel@tonic-gate VFS_HOLD(vfsp); 36667c478bd9Sstevel@tonic-gate mutex_exit(hmp); 36677c478bd9Sstevel@tonic-gate return (vfsp); 36687c478bd9Sstevel@tonic-gate } 36697c478bd9Sstevel@tonic-gate } 36707c478bd9Sstevel@tonic-gate mutex_exit(hmp); 36717c478bd9Sstevel@tonic-gate return (NULL); 36727c478bd9Sstevel@tonic-gate } 36737c478bd9Sstevel@tonic-gate 36747c478bd9Sstevel@tonic-gate /* 36757c478bd9Sstevel@tonic-gate * Search the vfs mount in progress list for a specified device/vfs entry. 36767c478bd9Sstevel@tonic-gate * Returns 0 if the first entry in the list that the device matches has the 36777c478bd9Sstevel@tonic-gate * given vfs pointer as well. If the device matches but a different vfs 36787c478bd9Sstevel@tonic-gate * pointer is encountered in the list before the given vfs pointer then 36797c478bd9Sstevel@tonic-gate * a 1 is returned. 36807c478bd9Sstevel@tonic-gate */ 36817c478bd9Sstevel@tonic-gate 36827c478bd9Sstevel@tonic-gate int 36837c478bd9Sstevel@tonic-gate vfs_devmounting(dev_t dev, struct vfs *vfsp) 36847c478bd9Sstevel@tonic-gate { 36857c478bd9Sstevel@tonic-gate int retval = 0; 36867c478bd9Sstevel@tonic-gate struct ipmnt *mipp; 36877c478bd9Sstevel@tonic-gate 36887c478bd9Sstevel@tonic-gate mutex_enter(&vfs_miplist_mutex); 36897c478bd9Sstevel@tonic-gate for (mipp = vfs_miplist; mipp != NULL; mipp = mipp->mip_next) { 36907c478bd9Sstevel@tonic-gate if (mipp->mip_dev == dev) { 36917c478bd9Sstevel@tonic-gate if (mipp->mip_vfsp != vfsp) 36927c478bd9Sstevel@tonic-gate retval = 1; 36937c478bd9Sstevel@tonic-gate break; 36947c478bd9Sstevel@tonic-gate } 36957c478bd9Sstevel@tonic-gate } 36967c478bd9Sstevel@tonic-gate mutex_exit(&vfs_miplist_mutex); 36977c478bd9Sstevel@tonic-gate return (retval); 36987c478bd9Sstevel@tonic-gate } 36997c478bd9Sstevel@tonic-gate 37007c478bd9Sstevel@tonic-gate /* 37017c478bd9Sstevel@tonic-gate * Search the vfs list for a specified device. Returns 1, if entry is found 37027c478bd9Sstevel@tonic-gate * or 0 if no suitable entry is found. 37037c478bd9Sstevel@tonic-gate */ 37047c478bd9Sstevel@tonic-gate 37057c478bd9Sstevel@tonic-gate int 37067c478bd9Sstevel@tonic-gate vfs_devismounted(dev_t dev) 37077c478bd9Sstevel@tonic-gate { 37087c478bd9Sstevel@tonic-gate struct vfs *vfsp; 37097c478bd9Sstevel@tonic-gate int found; 37107c478bd9Sstevel@tonic-gate 37117c478bd9Sstevel@tonic-gate vfs_list_read_lock(); 37127c478bd9Sstevel@tonic-gate vfsp = rootvfs; 37137c478bd9Sstevel@tonic-gate found = 0; 37147c478bd9Sstevel@tonic-gate do { 37157c478bd9Sstevel@tonic-gate if (vfsp->vfs_dev == dev) { 37167c478bd9Sstevel@tonic-gate found = 1; 37177c478bd9Sstevel@tonic-gate break; 37187c478bd9Sstevel@tonic-gate } 37197c478bd9Sstevel@tonic-gate vfsp = vfsp->vfs_next; 37207c478bd9Sstevel@tonic-gate } while (vfsp != rootvfs); 37217c478bd9Sstevel@tonic-gate 37227c478bd9Sstevel@tonic-gate vfs_list_unlock(); 37237c478bd9Sstevel@tonic-gate return (found); 37247c478bd9Sstevel@tonic-gate } 37257c478bd9Sstevel@tonic-gate 37267c478bd9Sstevel@tonic-gate /* 37277c478bd9Sstevel@tonic-gate * Search the vfs list for a specified device. Returns a pointer to it 37287c478bd9Sstevel@tonic-gate * or NULL if no suitable entry is found. The caller of this routine 37297c478bd9Sstevel@tonic-gate * is responsible for releasing the returned vfs pointer. 37307c478bd9Sstevel@tonic-gate */ 37317c478bd9Sstevel@tonic-gate struct vfs * 37327c478bd9Sstevel@tonic-gate vfs_dev2vfsp(dev_t dev) 37337c478bd9Sstevel@tonic-gate { 37347c478bd9Sstevel@tonic-gate struct vfs *vfsp; 37357c478bd9Sstevel@tonic-gate int found; 37367c478bd9Sstevel@tonic-gate 37377c478bd9Sstevel@tonic-gate vfs_list_read_lock(); 37387c478bd9Sstevel@tonic-gate vfsp = rootvfs; 37397c478bd9Sstevel@tonic-gate found = 0; 37407c478bd9Sstevel@tonic-gate do { 37417c478bd9Sstevel@tonic-gate /* 37427c478bd9Sstevel@tonic-gate * The following could be made more efficient by making 37437c478bd9Sstevel@tonic-gate * the entire loop use vfs_zone_next if the call is from 37447c478bd9Sstevel@tonic-gate * a zone. The only callers, however, ustat(2) and 37457c478bd9Sstevel@tonic-gate * umount2(2), don't seem to justify the added 37467c478bd9Sstevel@tonic-gate * complexity at present. 37477c478bd9Sstevel@tonic-gate */ 37487c478bd9Sstevel@tonic-gate if (vfsp->vfs_dev == dev && 37497c478bd9Sstevel@tonic-gate ZONE_PATH_VISIBLE(refstr_value(vfsp->vfs_mntpt), 37507c478bd9Sstevel@tonic-gate curproc->p_zone)) { 37517c478bd9Sstevel@tonic-gate VFS_HOLD(vfsp); 37527c478bd9Sstevel@tonic-gate found = 1; 37537c478bd9Sstevel@tonic-gate break; 37547c478bd9Sstevel@tonic-gate } 37557c478bd9Sstevel@tonic-gate vfsp = vfsp->vfs_next; 37567c478bd9Sstevel@tonic-gate } while (vfsp != rootvfs); 37577c478bd9Sstevel@tonic-gate vfs_list_unlock(); 37587c478bd9Sstevel@tonic-gate return (found ? vfsp: NULL); 37597c478bd9Sstevel@tonic-gate } 37607c478bd9Sstevel@tonic-gate 37617c478bd9Sstevel@tonic-gate /* 37627c478bd9Sstevel@tonic-gate * Search the vfs list for a specified mntpoint. Returns a pointer to it 37637c478bd9Sstevel@tonic-gate * or NULL if no suitable entry is found. The caller of this routine 37647c478bd9Sstevel@tonic-gate * is responsible for releasing the returned vfs pointer. 37657c478bd9Sstevel@tonic-gate * 37667c478bd9Sstevel@tonic-gate * Note that if multiple mntpoints match, the last one matching is 37677c478bd9Sstevel@tonic-gate * returned in an attempt to return the "top" mount when overlay 37687c478bd9Sstevel@tonic-gate * mounts are covering the same mount point. This is accomplished by starting 37697c478bd9Sstevel@tonic-gate * at the end of the list and working our way backwards, stopping at the first 37707c478bd9Sstevel@tonic-gate * matching mount. 37717c478bd9Sstevel@tonic-gate */ 37727c478bd9Sstevel@tonic-gate struct vfs * 37737c478bd9Sstevel@tonic-gate vfs_mntpoint2vfsp(const char *mp) 37747c478bd9Sstevel@tonic-gate { 37757c478bd9Sstevel@tonic-gate struct vfs *vfsp; 37767c478bd9Sstevel@tonic-gate struct vfs *retvfsp = NULL; 37777c478bd9Sstevel@tonic-gate zone_t *zone = curproc->p_zone; 37787c478bd9Sstevel@tonic-gate struct vfs *list; 37797c478bd9Sstevel@tonic-gate 37807c478bd9Sstevel@tonic-gate vfs_list_read_lock(); 37817c478bd9Sstevel@tonic-gate if (getzoneid() == GLOBAL_ZONEID) { 37827c478bd9Sstevel@tonic-gate /* 37837c478bd9Sstevel@tonic-gate * The global zone may see filesystems in any zone. 37847c478bd9Sstevel@tonic-gate */ 37857c478bd9Sstevel@tonic-gate vfsp = rootvfs->vfs_prev; 37867c478bd9Sstevel@tonic-gate do { 37877c478bd9Sstevel@tonic-gate if (strcmp(refstr_value(vfsp->vfs_mntpt), mp) == 0) { 37887c478bd9Sstevel@tonic-gate retvfsp = vfsp; 37897c478bd9Sstevel@tonic-gate break; 37907c478bd9Sstevel@tonic-gate } 37917c478bd9Sstevel@tonic-gate vfsp = vfsp->vfs_prev; 37927c478bd9Sstevel@tonic-gate } while (vfsp != rootvfs->vfs_prev); 37937c478bd9Sstevel@tonic-gate } else if ((list = zone->zone_vfslist) != NULL) { 37947c478bd9Sstevel@tonic-gate const char *mntpt; 37957c478bd9Sstevel@tonic-gate 37967c478bd9Sstevel@tonic-gate vfsp = list->vfs_zone_prev; 37977c478bd9Sstevel@tonic-gate do { 37987c478bd9Sstevel@tonic-gate mntpt = refstr_value(vfsp->vfs_mntpt); 37997c478bd9Sstevel@tonic-gate mntpt = ZONE_PATH_TRANSLATE(mntpt, zone); 38007c478bd9Sstevel@tonic-gate if (strcmp(mntpt, mp) == 0) { 38017c478bd9Sstevel@tonic-gate retvfsp = vfsp; 38027c478bd9Sstevel@tonic-gate break; 38037c478bd9Sstevel@tonic-gate } 38047c478bd9Sstevel@tonic-gate vfsp = vfsp->vfs_zone_prev; 38057c478bd9Sstevel@tonic-gate } while (vfsp != list->vfs_zone_prev); 38067c478bd9Sstevel@tonic-gate } 38077c478bd9Sstevel@tonic-gate if (retvfsp) 38087c478bd9Sstevel@tonic-gate VFS_HOLD(retvfsp); 38097c478bd9Sstevel@tonic-gate vfs_list_unlock(); 38107c478bd9Sstevel@tonic-gate return (retvfsp); 38117c478bd9Sstevel@tonic-gate } 38127c478bd9Sstevel@tonic-gate 38137c478bd9Sstevel@tonic-gate /* 38147c478bd9Sstevel@tonic-gate * Search the vfs list for a specified vfsops. 38157c478bd9Sstevel@tonic-gate * if vfs entry is found then return 1, else 0. 38167c478bd9Sstevel@tonic-gate */ 38177c478bd9Sstevel@tonic-gate int 38187c478bd9Sstevel@tonic-gate vfs_opsinuse(vfsops_t *ops) 38197c478bd9Sstevel@tonic-gate { 38207c478bd9Sstevel@tonic-gate struct vfs *vfsp; 38217c478bd9Sstevel@tonic-gate int found; 38227c478bd9Sstevel@tonic-gate 38237c478bd9Sstevel@tonic-gate vfs_list_read_lock(); 38247c478bd9Sstevel@tonic-gate vfsp = rootvfs; 38257c478bd9Sstevel@tonic-gate found = 0; 38267c478bd9Sstevel@tonic-gate do { 38277c478bd9Sstevel@tonic-gate if (vfs_getops(vfsp) == ops) { 38287c478bd9Sstevel@tonic-gate found = 1; 38297c478bd9Sstevel@tonic-gate break; 38307c478bd9Sstevel@tonic-gate } 38317c478bd9Sstevel@tonic-gate vfsp = vfsp->vfs_next; 38327c478bd9Sstevel@tonic-gate } while (vfsp != rootvfs); 38337c478bd9Sstevel@tonic-gate vfs_list_unlock(); 38347c478bd9Sstevel@tonic-gate return (found); 38357c478bd9Sstevel@tonic-gate } 38367c478bd9Sstevel@tonic-gate 38377c478bd9Sstevel@tonic-gate /* 38387c478bd9Sstevel@tonic-gate * Allocate an entry in vfssw for a file system type 38397c478bd9Sstevel@tonic-gate */ 38407c478bd9Sstevel@tonic-gate struct vfssw * 384143d5cd3dSjohnlev allocate_vfssw(const char *type) 38427c478bd9Sstevel@tonic-gate { 38437c478bd9Sstevel@tonic-gate struct vfssw *vswp; 38447c478bd9Sstevel@tonic-gate 38457c478bd9Sstevel@tonic-gate if (type[0] == '\0' || strlen(type) + 1 > _ST_FSTYPSZ) { 38467c478bd9Sstevel@tonic-gate /* 38477c478bd9Sstevel@tonic-gate * The vfssw table uses the empty string to identify an 38487c478bd9Sstevel@tonic-gate * available entry; we cannot add any type which has 38497c478bd9Sstevel@tonic-gate * a leading NUL. The string length is limited to 38507c478bd9Sstevel@tonic-gate * the size of the st_fstype array in struct stat. 38517c478bd9Sstevel@tonic-gate */ 38527c478bd9Sstevel@tonic-gate return (NULL); 38537c478bd9Sstevel@tonic-gate } 38547c478bd9Sstevel@tonic-gate 38557c478bd9Sstevel@tonic-gate ASSERT(VFSSW_WRITE_LOCKED()); 38567c478bd9Sstevel@tonic-gate for (vswp = &vfssw[1]; vswp < &vfssw[nfstype]; vswp++) 38577c478bd9Sstevel@tonic-gate if (!ALLOCATED_VFSSW(vswp)) { 38587c478bd9Sstevel@tonic-gate vswp->vsw_name = kmem_alloc(strlen(type) + 1, KM_SLEEP); 38597c478bd9Sstevel@tonic-gate (void) strcpy(vswp->vsw_name, type); 38607c478bd9Sstevel@tonic-gate ASSERT(vswp->vsw_count == 0); 38617c478bd9Sstevel@tonic-gate vswp->vsw_count = 1; 38627c478bd9Sstevel@tonic-gate mutex_init(&vswp->vsw_lock, NULL, MUTEX_DEFAULT, NULL); 38637c478bd9Sstevel@tonic-gate return (vswp); 38647c478bd9Sstevel@tonic-gate } 38657c478bd9Sstevel@tonic-gate return (NULL); 38667c478bd9Sstevel@tonic-gate } 38677c478bd9Sstevel@tonic-gate 38687c478bd9Sstevel@tonic-gate /* 38697c478bd9Sstevel@tonic-gate * Impose additional layer of translation between vfstype names 38707c478bd9Sstevel@tonic-gate * and module names in the filesystem. 38717c478bd9Sstevel@tonic-gate */ 387243d5cd3dSjohnlev static const char * 387343d5cd3dSjohnlev vfs_to_modname(const char *vfstype) 38747c478bd9Sstevel@tonic-gate { 38757c478bd9Sstevel@tonic-gate if (strcmp(vfstype, "proc") == 0) { 38767c478bd9Sstevel@tonic-gate vfstype = "procfs"; 38777c478bd9Sstevel@tonic-gate } else if (strcmp(vfstype, "fd") == 0) { 38787c478bd9Sstevel@tonic-gate vfstype = "fdfs"; 38797c478bd9Sstevel@tonic-gate } else if (strncmp(vfstype, "nfs", 3) == 0) { 38807c478bd9Sstevel@tonic-gate vfstype = "nfs"; 38817c478bd9Sstevel@tonic-gate } 38827c478bd9Sstevel@tonic-gate 38837c478bd9Sstevel@tonic-gate return (vfstype); 38847c478bd9Sstevel@tonic-gate } 38857c478bd9Sstevel@tonic-gate 38867c478bd9Sstevel@tonic-gate /* 38877c478bd9Sstevel@tonic-gate * Find a vfssw entry given a file system type name. 38887c478bd9Sstevel@tonic-gate * Try to autoload the filesystem if it's not found. 38897c478bd9Sstevel@tonic-gate * If it's installed, return the vfssw locked to prevent unloading. 38907c478bd9Sstevel@tonic-gate */ 38917c478bd9Sstevel@tonic-gate struct vfssw * 389243d5cd3dSjohnlev vfs_getvfssw(const char *type) 38937c478bd9Sstevel@tonic-gate { 38947c478bd9Sstevel@tonic-gate struct vfssw *vswp; 389543d5cd3dSjohnlev const char *modname; 38967c478bd9Sstevel@tonic-gate 38977c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 38987c478bd9Sstevel@tonic-gate vswp = vfs_getvfsswbyname(type); 38997c478bd9Sstevel@tonic-gate modname = vfs_to_modname(type); 39007c478bd9Sstevel@tonic-gate 39017c478bd9Sstevel@tonic-gate if (rootdir == NULL) { 39027c478bd9Sstevel@tonic-gate /* 39037c478bd9Sstevel@tonic-gate * If we haven't yet loaded the root file system, then our 39047c478bd9Sstevel@tonic-gate * _init won't be called until later. Allocate vfssw entry, 39057c478bd9Sstevel@tonic-gate * because mod_installfs won't be called. 39067c478bd9Sstevel@tonic-gate */ 39077c478bd9Sstevel@tonic-gate if (vswp == NULL) { 39087c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 39097c478bd9Sstevel@tonic-gate WLOCK_VFSSW(); 39107c478bd9Sstevel@tonic-gate if ((vswp = vfs_getvfsswbyname(type)) == NULL) { 39117c478bd9Sstevel@tonic-gate if ((vswp = allocate_vfssw(type)) == NULL) { 39127c478bd9Sstevel@tonic-gate WUNLOCK_VFSSW(); 39137c478bd9Sstevel@tonic-gate return (NULL); 39147c478bd9Sstevel@tonic-gate } 39157c478bd9Sstevel@tonic-gate } 39167c478bd9Sstevel@tonic-gate WUNLOCK_VFSSW(); 39177c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 39187c478bd9Sstevel@tonic-gate } 39197c478bd9Sstevel@tonic-gate if (!VFS_INSTALLED(vswp)) { 39207c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 39217c478bd9Sstevel@tonic-gate (void) modloadonly("fs", modname); 39227c478bd9Sstevel@tonic-gate } else 39237c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 39247c478bd9Sstevel@tonic-gate return (vswp); 39257c478bd9Sstevel@tonic-gate } 39267c478bd9Sstevel@tonic-gate 39277c478bd9Sstevel@tonic-gate /* 39287c478bd9Sstevel@tonic-gate * Try to load the filesystem. Before calling modload(), we drop 39297c478bd9Sstevel@tonic-gate * our lock on the VFS switch table, and pick it up after the 39307c478bd9Sstevel@tonic-gate * module is loaded. However, there is a potential race: the 39317c478bd9Sstevel@tonic-gate * module could be unloaded after the call to modload() completes 39327c478bd9Sstevel@tonic-gate * but before we pick up the lock and drive on. Therefore, 39337c478bd9Sstevel@tonic-gate * we keep reloading the module until we've loaded the module 39347c478bd9Sstevel@tonic-gate * _and_ we have the lock on the VFS switch table. 39357c478bd9Sstevel@tonic-gate */ 39367c478bd9Sstevel@tonic-gate while (vswp == NULL || !VFS_INSTALLED(vswp)) { 39377c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 39387c478bd9Sstevel@tonic-gate if (modload("fs", modname) == -1) 39397c478bd9Sstevel@tonic-gate return (NULL); 39407c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 39417c478bd9Sstevel@tonic-gate if (vswp == NULL) 39427c478bd9Sstevel@tonic-gate if ((vswp = vfs_getvfsswbyname(type)) == NULL) 39437c478bd9Sstevel@tonic-gate break; 39447c478bd9Sstevel@tonic-gate } 39457c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 39467c478bd9Sstevel@tonic-gate 39477c478bd9Sstevel@tonic-gate return (vswp); 39487c478bd9Sstevel@tonic-gate } 39497c478bd9Sstevel@tonic-gate 39507c478bd9Sstevel@tonic-gate /* 39517c478bd9Sstevel@tonic-gate * Find a vfssw entry given a file system type name. 39527c478bd9Sstevel@tonic-gate */ 39537c478bd9Sstevel@tonic-gate struct vfssw * 395443d5cd3dSjohnlev vfs_getvfsswbyname(const char *type) 39557c478bd9Sstevel@tonic-gate { 39567c478bd9Sstevel@tonic-gate struct vfssw *vswp; 39577c478bd9Sstevel@tonic-gate 39587c478bd9Sstevel@tonic-gate ASSERT(VFSSW_LOCKED()); 39597c478bd9Sstevel@tonic-gate if (type == NULL || *type == '\0') 39607c478bd9Sstevel@tonic-gate return (NULL); 39617c478bd9Sstevel@tonic-gate 39627c478bd9Sstevel@tonic-gate for (vswp = &vfssw[1]; vswp < &vfssw[nfstype]; vswp++) { 39637c478bd9Sstevel@tonic-gate if (strcmp(type, vswp->vsw_name) == 0) { 39647c478bd9Sstevel@tonic-gate vfs_refvfssw(vswp); 39657c478bd9Sstevel@tonic-gate return (vswp); 39667c478bd9Sstevel@tonic-gate } 39677c478bd9Sstevel@tonic-gate } 39687c478bd9Sstevel@tonic-gate 39697c478bd9Sstevel@tonic-gate return (NULL); 39707c478bd9Sstevel@tonic-gate } 39717c478bd9Sstevel@tonic-gate 39727c478bd9Sstevel@tonic-gate /* 39737c478bd9Sstevel@tonic-gate * Find a vfssw entry given a set of vfsops. 39747c478bd9Sstevel@tonic-gate */ 39757c478bd9Sstevel@tonic-gate struct vfssw * 39767c478bd9Sstevel@tonic-gate vfs_getvfsswbyvfsops(vfsops_t *vfsops) 39777c478bd9Sstevel@tonic-gate { 39787c478bd9Sstevel@tonic-gate struct vfssw *vswp; 39797c478bd9Sstevel@tonic-gate 39807c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 39817c478bd9Sstevel@tonic-gate for (vswp = &vfssw[1]; vswp < &vfssw[nfstype]; vswp++) { 39827c478bd9Sstevel@tonic-gate if (ALLOCATED_VFSSW(vswp) && &vswp->vsw_vfsops == vfsops) { 39837c478bd9Sstevel@tonic-gate vfs_refvfssw(vswp); 39847c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 39857c478bd9Sstevel@tonic-gate return (vswp); 39867c478bd9Sstevel@tonic-gate } 39877c478bd9Sstevel@tonic-gate } 39887c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 39897c478bd9Sstevel@tonic-gate 39907c478bd9Sstevel@tonic-gate return (NULL); 39917c478bd9Sstevel@tonic-gate } 39927c478bd9Sstevel@tonic-gate 39937c478bd9Sstevel@tonic-gate /* 39947c478bd9Sstevel@tonic-gate * Reference a vfssw entry. 39957c478bd9Sstevel@tonic-gate */ 39967c478bd9Sstevel@tonic-gate void 39977c478bd9Sstevel@tonic-gate vfs_refvfssw(struct vfssw *vswp) 39987c478bd9Sstevel@tonic-gate { 39997c478bd9Sstevel@tonic-gate 40007c478bd9Sstevel@tonic-gate mutex_enter(&vswp->vsw_lock); 40017c478bd9Sstevel@tonic-gate vswp->vsw_count++; 40027c478bd9Sstevel@tonic-gate mutex_exit(&vswp->vsw_lock); 40037c478bd9Sstevel@tonic-gate } 40047c478bd9Sstevel@tonic-gate 40057c478bd9Sstevel@tonic-gate /* 40067c478bd9Sstevel@tonic-gate * Unreference a vfssw entry. 40077c478bd9Sstevel@tonic-gate */ 40087c478bd9Sstevel@tonic-gate void 40097c478bd9Sstevel@tonic-gate vfs_unrefvfssw(struct vfssw *vswp) 40107c478bd9Sstevel@tonic-gate { 40117c478bd9Sstevel@tonic-gate 40127c478bd9Sstevel@tonic-gate mutex_enter(&vswp->vsw_lock); 40137c478bd9Sstevel@tonic-gate vswp->vsw_count--; 40147c478bd9Sstevel@tonic-gate mutex_exit(&vswp->vsw_lock); 40157c478bd9Sstevel@tonic-gate } 40167c478bd9Sstevel@tonic-gate 40177c478bd9Sstevel@tonic-gate static int sync_retries = 20; /* number of retries when not making progress */ 40187c478bd9Sstevel@tonic-gate static int sync_triesleft; /* portion of sync_retries remaining */ 40197c478bd9Sstevel@tonic-gate 40207c478bd9Sstevel@tonic-gate static pgcnt_t old_pgcnt, new_pgcnt; 40217c478bd9Sstevel@tonic-gate static int new_bufcnt, old_bufcnt; 40227c478bd9Sstevel@tonic-gate 40237c478bd9Sstevel@tonic-gate /* 40247c478bd9Sstevel@tonic-gate * Sync all of the mounted filesystems, and then wait for the actual i/o to 40257c478bd9Sstevel@tonic-gate * complete. We wait by counting the number of dirty pages and buffers, 40267c478bd9Sstevel@tonic-gate * pushing them out using bio_busy() and page_busy(), and then counting again. 40273f11de9dSSara Hartse * This routine is used during the uadmin A_SHUTDOWN code. It should only 40287c478bd9Sstevel@tonic-gate * be used after some higher-level mechanism has quiesced the system so that 40297c478bd9Sstevel@tonic-gate * new writes are not being initiated while we are waiting for completion. 40307c478bd9Sstevel@tonic-gate * 40313f11de9dSSara Hartse * To ensure finite running time, our algorithm uses sync_triesleft (a progress 40323f11de9dSSara Hartse * counter used by the vfs_syncall() loop below). It is declared above so 40333f11de9dSSara Hartse * it can be found easily in the debugger. 40347c478bd9Sstevel@tonic-gate * 40357c478bd9Sstevel@tonic-gate * The sync_triesleft counter is updated by vfs_syncall() itself. If we make 40367c478bd9Sstevel@tonic-gate * sync_retries consecutive calls to bio_busy() and page_busy() without 40377c478bd9Sstevel@tonic-gate * decreasing either the number of dirty buffers or dirty pages below the 40387c478bd9Sstevel@tonic-gate * lowest count we have seen so far, we give up and return from vfs_syncall(). 40397c478bd9Sstevel@tonic-gate * 40407c478bd9Sstevel@tonic-gate * Each loop iteration ends with a call to delay() one second to allow time for 40417c478bd9Sstevel@tonic-gate * i/o completion and to permit the user time to read our progress messages. 40427c478bd9Sstevel@tonic-gate */ 40437c478bd9Sstevel@tonic-gate void 40447c478bd9Sstevel@tonic-gate vfs_syncall(void) 40457c478bd9Sstevel@tonic-gate { 40467c478bd9Sstevel@tonic-gate if (rootdir == NULL && !modrootloaded) 40473f11de9dSSara Hartse return; /* no filesystems have been loaded yet */ 40487c478bd9Sstevel@tonic-gate 40497c478bd9Sstevel@tonic-gate printf("syncing file systems..."); 40507c478bd9Sstevel@tonic-gate sync(); 40517c478bd9Sstevel@tonic-gate 40527c478bd9Sstevel@tonic-gate sync_triesleft = sync_retries; 40537c478bd9Sstevel@tonic-gate 40547c478bd9Sstevel@tonic-gate old_bufcnt = new_bufcnt = INT_MAX; 40557c478bd9Sstevel@tonic-gate old_pgcnt = new_pgcnt = ULONG_MAX; 40567c478bd9Sstevel@tonic-gate 40577c478bd9Sstevel@tonic-gate while (sync_triesleft > 0) { 40587c478bd9Sstevel@tonic-gate old_bufcnt = MIN(old_bufcnt, new_bufcnt); 40597c478bd9Sstevel@tonic-gate old_pgcnt = MIN(old_pgcnt, new_pgcnt); 40607c478bd9Sstevel@tonic-gate 40617c478bd9Sstevel@tonic-gate new_bufcnt = bio_busy(B_TRUE); 40627c478bd9Sstevel@tonic-gate new_pgcnt = page_busy(B_TRUE); 40637c478bd9Sstevel@tonic-gate 40647c478bd9Sstevel@tonic-gate if (new_bufcnt == 0 && new_pgcnt == 0) 40657c478bd9Sstevel@tonic-gate break; 40667c478bd9Sstevel@tonic-gate 40677c478bd9Sstevel@tonic-gate if (new_bufcnt < old_bufcnt || new_pgcnt < old_pgcnt) 40687c478bd9Sstevel@tonic-gate sync_triesleft = sync_retries; 40697c478bd9Sstevel@tonic-gate else 40707c478bd9Sstevel@tonic-gate sync_triesleft--; 40717c478bd9Sstevel@tonic-gate 40727c478bd9Sstevel@tonic-gate if (new_bufcnt) 40737c478bd9Sstevel@tonic-gate printf(" [%d]", new_bufcnt); 40747c478bd9Sstevel@tonic-gate if (new_pgcnt) 40757c478bd9Sstevel@tonic-gate printf(" %lu", new_pgcnt); 40767c478bd9Sstevel@tonic-gate 40777c478bd9Sstevel@tonic-gate delay(hz); 40787c478bd9Sstevel@tonic-gate } 40797c478bd9Sstevel@tonic-gate 40807c478bd9Sstevel@tonic-gate if (new_bufcnt != 0 || new_pgcnt != 0) 40817c478bd9Sstevel@tonic-gate printf(" done (not all i/o completed)\n"); 40827c478bd9Sstevel@tonic-gate else 40837c478bd9Sstevel@tonic-gate printf(" done\n"); 40847c478bd9Sstevel@tonic-gate 40857c478bd9Sstevel@tonic-gate delay(hz); 40867c478bd9Sstevel@tonic-gate } 40877c478bd9Sstevel@tonic-gate 40887c478bd9Sstevel@tonic-gate /* 40897c478bd9Sstevel@tonic-gate * Map VFS flags to statvfs flags. These shouldn't really be separate 40907c478bd9Sstevel@tonic-gate * flags at all. 40917c478bd9Sstevel@tonic-gate */ 40927c478bd9Sstevel@tonic-gate uint_t 40937c478bd9Sstevel@tonic-gate vf_to_stf(uint_t vf) 40947c478bd9Sstevel@tonic-gate { 40957c478bd9Sstevel@tonic-gate uint_t stf = 0; 40967c478bd9Sstevel@tonic-gate 40977c478bd9Sstevel@tonic-gate if (vf & VFS_RDONLY) 40987c478bd9Sstevel@tonic-gate stf |= ST_RDONLY; 40997c478bd9Sstevel@tonic-gate if (vf & VFS_NOSETUID) 41007c478bd9Sstevel@tonic-gate stf |= ST_NOSUID; 41017c478bd9Sstevel@tonic-gate if (vf & VFS_NOTRUNC) 41027c478bd9Sstevel@tonic-gate stf |= ST_NOTRUNC; 41037c478bd9Sstevel@tonic-gate 41047c478bd9Sstevel@tonic-gate return (stf); 41057c478bd9Sstevel@tonic-gate } 41067c478bd9Sstevel@tonic-gate 41077c478bd9Sstevel@tonic-gate /* 41087c478bd9Sstevel@tonic-gate * Entries for (illegal) fstype 0. 41097c478bd9Sstevel@tonic-gate */ 41107c478bd9Sstevel@tonic-gate /* ARGSUSED */ 41117c478bd9Sstevel@tonic-gate int 41127c478bd9Sstevel@tonic-gate vfsstray_sync(struct vfs *vfsp, short arg, struct cred *cr) 41137c478bd9Sstevel@tonic-gate { 41147c478bd9Sstevel@tonic-gate cmn_err(CE_PANIC, "stray vfs operation"); 41157c478bd9Sstevel@tonic-gate return (0); 41167c478bd9Sstevel@tonic-gate } 41177c478bd9Sstevel@tonic-gate 41187c478bd9Sstevel@tonic-gate /* 41197c478bd9Sstevel@tonic-gate * Entries for (illegal) fstype 0. 41207c478bd9Sstevel@tonic-gate */ 41217c478bd9Sstevel@tonic-gate int 41227c478bd9Sstevel@tonic-gate vfsstray(void) 41237c478bd9Sstevel@tonic-gate { 41247c478bd9Sstevel@tonic-gate cmn_err(CE_PANIC, "stray vfs operation"); 41257c478bd9Sstevel@tonic-gate return (0); 41267c478bd9Sstevel@tonic-gate } 41277c478bd9Sstevel@tonic-gate 41287c478bd9Sstevel@tonic-gate /* 41297c478bd9Sstevel@tonic-gate * Support for dealing with forced UFS unmount and its interaction with 41307c478bd9Sstevel@tonic-gate * LOFS. Could be used by any filesystem. 41317c478bd9Sstevel@tonic-gate * See bug 1203132. 41327c478bd9Sstevel@tonic-gate */ 41337c478bd9Sstevel@tonic-gate int 41347c478bd9Sstevel@tonic-gate vfs_EIO(void) 41357c478bd9Sstevel@tonic-gate { 41367c478bd9Sstevel@tonic-gate return (EIO); 41377c478bd9Sstevel@tonic-gate } 41387c478bd9Sstevel@tonic-gate 41397c478bd9Sstevel@tonic-gate /* 41407c478bd9Sstevel@tonic-gate * We've gotta define the op for sync separately, since the compiler gets 41417c478bd9Sstevel@tonic-gate * confused if we mix and match ANSI and normal style prototypes when 41427c478bd9Sstevel@tonic-gate * a "short" argument is present and spits out a warning. 41437c478bd9Sstevel@tonic-gate */ 41447c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 41457c478bd9Sstevel@tonic-gate int 41467c478bd9Sstevel@tonic-gate vfs_EIO_sync(struct vfs *vfsp, short arg, struct cred *cr) 41477c478bd9Sstevel@tonic-gate { 41487c478bd9Sstevel@tonic-gate return (EIO); 41497c478bd9Sstevel@tonic-gate } 41507c478bd9Sstevel@tonic-gate 41517c478bd9Sstevel@tonic-gate vfs_t EIO_vfs; 41527c478bd9Sstevel@tonic-gate vfsops_t *EIO_vfsops; 41537c478bd9Sstevel@tonic-gate 41547c478bd9Sstevel@tonic-gate /* 41557c478bd9Sstevel@tonic-gate * Called from startup() to initialize all loaded vfs's 41567c478bd9Sstevel@tonic-gate */ 41577c478bd9Sstevel@tonic-gate void 41587c478bd9Sstevel@tonic-gate vfsinit(void) 41597c478bd9Sstevel@tonic-gate { 41607c478bd9Sstevel@tonic-gate struct vfssw *vswp; 41617c478bd9Sstevel@tonic-gate int error; 416282c7f3c4Srsb extern int vopstats_enabled; 41635a59a8b3Srsb extern void vopstats_startup(); 41647c478bd9Sstevel@tonic-gate 41657c478bd9Sstevel@tonic-gate static const fs_operation_def_t EIO_vfsops_template[] = { 4166aa59c4cbSrsb VFSNAME_MOUNT, { .error = vfs_EIO }, 4167aa59c4cbSrsb VFSNAME_UNMOUNT, { .error = vfs_EIO }, 4168aa59c4cbSrsb VFSNAME_ROOT, { .error = vfs_EIO }, 4169aa59c4cbSrsb VFSNAME_STATVFS, { .error = vfs_EIO }, 4170aa59c4cbSrsb VFSNAME_SYNC, { .vfs_sync = vfs_EIO_sync }, 4171aa59c4cbSrsb VFSNAME_VGET, { .error = vfs_EIO }, 4172aa59c4cbSrsb VFSNAME_MOUNTROOT, { .error = vfs_EIO }, 4173aa59c4cbSrsb VFSNAME_FREEVFS, { .error = vfs_EIO }, 4174aa59c4cbSrsb VFSNAME_VNSTATE, { .error = vfs_EIO }, 41757c478bd9Sstevel@tonic-gate NULL, NULL 41767c478bd9Sstevel@tonic-gate }; 41777c478bd9Sstevel@tonic-gate 4178aa59c4cbSrsb static const fs_operation_def_t stray_vfsops_template[] = { 4179aa59c4cbSrsb VFSNAME_MOUNT, { .error = vfsstray }, 4180aa59c4cbSrsb VFSNAME_UNMOUNT, { .error = vfsstray }, 4181aa59c4cbSrsb VFSNAME_ROOT, { .error = vfsstray }, 4182aa59c4cbSrsb VFSNAME_STATVFS, { .error = vfsstray }, 4183aa59c4cbSrsb VFSNAME_SYNC, { .vfs_sync = vfsstray_sync }, 4184aa59c4cbSrsb VFSNAME_VGET, { .error = vfsstray }, 4185aa59c4cbSrsb VFSNAME_MOUNTROOT, { .error = vfsstray }, 4186aa59c4cbSrsb VFSNAME_FREEVFS, { .error = vfsstray }, 4187aa59c4cbSrsb VFSNAME_VNSTATE, { .error = vfsstray }, 4188aa59c4cbSrsb NULL, NULL 4189aa59c4cbSrsb }; 41907c478bd9Sstevel@tonic-gate 4191da6c28aaSamw /* Create vfs cache */ 4192da6c28aaSamw vfs_cache = kmem_cache_create("vfs_cache", sizeof (struct vfs), 4193da6c28aaSamw sizeof (uintptr_t), NULL, NULL, NULL, NULL, NULL, 0); 41947c478bd9Sstevel@tonic-gate 4195da6c28aaSamw /* Initialize the vnode cache (file systems may use it during init). */ 41967c478bd9Sstevel@tonic-gate vn_create_cache(); 41977c478bd9Sstevel@tonic-gate 41987c478bd9Sstevel@tonic-gate /* Setup event monitor framework */ 41997c478bd9Sstevel@tonic-gate fem_init(); 42007c478bd9Sstevel@tonic-gate 42017c478bd9Sstevel@tonic-gate /* Initialize the dummy stray file system type. */ 4202d320ee2dSrsb error = vfs_setfsops(0, stray_vfsops_template, NULL); 42037c478bd9Sstevel@tonic-gate 42047c478bd9Sstevel@tonic-gate /* Initialize the dummy EIO file system. */ 42057c478bd9Sstevel@tonic-gate error = vfs_makefsops(EIO_vfsops_template, &EIO_vfsops); 42067c478bd9Sstevel@tonic-gate if (error != 0) { 42077c478bd9Sstevel@tonic-gate cmn_err(CE_WARN, "vfsinit: bad EIO vfs ops template"); 42087c478bd9Sstevel@tonic-gate /* Shouldn't happen, but not bad enough to panic */ 42097c478bd9Sstevel@tonic-gate } 42107c478bd9Sstevel@tonic-gate 42117c478bd9Sstevel@tonic-gate VFS_INIT(&EIO_vfs, EIO_vfsops, (caddr_t)NULL); 42127c478bd9Sstevel@tonic-gate 42137c478bd9Sstevel@tonic-gate /* 42147c478bd9Sstevel@tonic-gate * Default EIO_vfs.vfs_flag to VFS_UNMOUNTED so a lookup 42157c478bd9Sstevel@tonic-gate * on this vfs can immediately notice it's invalid. 42167c478bd9Sstevel@tonic-gate */ 42177c478bd9Sstevel@tonic-gate EIO_vfs.vfs_flag |= VFS_UNMOUNTED; 42187c478bd9Sstevel@tonic-gate 42197c478bd9Sstevel@tonic-gate /* 42207c478bd9Sstevel@tonic-gate * Call the init routines of non-loadable filesystems only. 42217c478bd9Sstevel@tonic-gate * Filesystems which are loaded as separate modules will be 42227c478bd9Sstevel@tonic-gate * initialized by the module loading code instead. 42237c478bd9Sstevel@tonic-gate */ 42247c478bd9Sstevel@tonic-gate 42257c478bd9Sstevel@tonic-gate for (vswp = &vfssw[1]; vswp < &vfssw[nfstype]; vswp++) { 42267c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 42277c478bd9Sstevel@tonic-gate if (vswp->vsw_init != NULL) 42287c478bd9Sstevel@tonic-gate (*vswp->vsw_init)(vswp - vfssw, vswp->vsw_name); 42297c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 42307c478bd9Sstevel@tonic-gate } 42315a59a8b3Srsb 42325a59a8b3Srsb vopstats_startup(); 423382c7f3c4Srsb 423482c7f3c4Srsb if (vopstats_enabled) { 423582c7f3c4Srsb /* EIO_vfs can collect stats, but we don't retrieve them */ 423682c7f3c4Srsb initialize_vopstats(&EIO_vfs.vfs_vopstats); 423782c7f3c4Srsb EIO_vfs.vfs_fstypevsp = NULL; 423882c7f3c4Srsb EIO_vfs.vfs_vskap = NULL; 423982c7f3c4Srsb EIO_vfs.vfs_flag |= VFS_STATS; 424082c7f3c4Srsb } 4241da6c28aaSamw 4242da6c28aaSamw xattr_init(); 42437a286c47SDai Ngo 42447a286c47SDai Ngo reparse_point_init(); 4245da6c28aaSamw } 4246da6c28aaSamw 4247da6c28aaSamw vfs_t * 4248da6c28aaSamw vfs_alloc(int kmflag) 4249da6c28aaSamw { 4250da6c28aaSamw vfs_t *vfsp; 4251da6c28aaSamw 4252da6c28aaSamw vfsp = kmem_cache_alloc(vfs_cache, kmflag); 4253da6c28aaSamw 4254da6c28aaSamw /* 4255da6c28aaSamw * Do the simplest initialization here. 4256da6c28aaSamw * Everything else gets done in vfs_init() 4257da6c28aaSamw */ 4258da6c28aaSamw bzero(vfsp, sizeof (vfs_t)); 4259da6c28aaSamw return (vfsp); 4260da6c28aaSamw } 4261da6c28aaSamw 4262da6c28aaSamw void 4263da6c28aaSamw vfs_free(vfs_t *vfsp) 4264da6c28aaSamw { 4265da6c28aaSamw /* 4266da6c28aaSamw * One would be tempted to assert that "vfsp->vfs_count == 0". 4267da6c28aaSamw * The problem is that this gets called out of domount() with 4268da6c28aaSamw * a partially initialized vfs and a vfs_count of 1. This is 4269da6c28aaSamw * also called from vfs_rele() with a vfs_count of 0. We can't 4270da6c28aaSamw * call VFS_RELE() from domount() if VFS_MOUNT() hasn't successfully 4271da6c28aaSamw * returned. This is because VFS_MOUNT() fully initializes the 4272da6c28aaSamw * vfs structure and its associated data. VFS_RELE() will call 4273da6c28aaSamw * VFS_FREEVFS() which may panic the system if the data structures 4274da6c28aaSamw * aren't fully initialized from a successful VFS_MOUNT()). 4275da6c28aaSamw */ 4276da6c28aaSamw 4277da6c28aaSamw /* If FEM was in use, make sure everything gets cleaned up */ 4278da6c28aaSamw if (vfsp->vfs_femhead) { 4279da6c28aaSamw ASSERT(vfsp->vfs_femhead->femh_list == NULL); 4280da6c28aaSamw mutex_destroy(&vfsp->vfs_femhead->femh_lock); 4281da6c28aaSamw kmem_free(vfsp->vfs_femhead, sizeof (*(vfsp->vfs_femhead))); 4282da6c28aaSamw vfsp->vfs_femhead = NULL; 4283da6c28aaSamw } 4284da6c28aaSamw 4285da6c28aaSamw if (vfsp->vfs_implp) 4286da6c28aaSamw vfsimpl_teardown(vfsp); 4287da6c28aaSamw sema_destroy(&vfsp->vfs_reflock); 4288da6c28aaSamw kmem_cache_free(vfs_cache, vfsp); 42897c478bd9Sstevel@tonic-gate } 42907c478bd9Sstevel@tonic-gate 42917c478bd9Sstevel@tonic-gate /* 42927c478bd9Sstevel@tonic-gate * Increments the vfs reference count by one atomically. 42937c478bd9Sstevel@tonic-gate */ 42947c478bd9Sstevel@tonic-gate void 42957c478bd9Sstevel@tonic-gate vfs_hold(vfs_t *vfsp) 42967c478bd9Sstevel@tonic-gate { 42971a5e258fSJosef 'Jeff' Sipek atomic_inc_32(&vfsp->vfs_count); 42987c478bd9Sstevel@tonic-gate ASSERT(vfsp->vfs_count != 0); 42997c478bd9Sstevel@tonic-gate } 43007c478bd9Sstevel@tonic-gate 43017c478bd9Sstevel@tonic-gate /* 43027c478bd9Sstevel@tonic-gate * Decrements the vfs reference count by one atomically. When 43037c478bd9Sstevel@tonic-gate * vfs reference count becomes zero, it calls the file system 43047c478bd9Sstevel@tonic-gate * specific vfs_freevfs() to free up the resources. 43057c478bd9Sstevel@tonic-gate */ 43067c478bd9Sstevel@tonic-gate void 43077c478bd9Sstevel@tonic-gate vfs_rele(vfs_t *vfsp) 43087c478bd9Sstevel@tonic-gate { 43097c478bd9Sstevel@tonic-gate ASSERT(vfsp->vfs_count != 0); 43101a5e258fSJosef 'Jeff' Sipek if (atomic_dec_32_nv(&vfsp->vfs_count) == 0) { 43117c478bd9Sstevel@tonic-gate VFS_FREEVFS(vfsp); 431293239addSjohnlev lofi_remove(vfsp); 43137c478bd9Sstevel@tonic-gate if (vfsp->vfs_zone) 4314a19609f8Sjv zone_rele_ref(&vfsp->vfs_implp->vi_zone_ref, 4315a19609f8Sjv ZONE_REF_VFS); 43167c478bd9Sstevel@tonic-gate vfs_freemnttab(vfsp); 4317da6c28aaSamw vfs_free(vfsp); 43187c478bd9Sstevel@tonic-gate } 43197c478bd9Sstevel@tonic-gate } 43207c478bd9Sstevel@tonic-gate 43217c478bd9Sstevel@tonic-gate /* 43227c478bd9Sstevel@tonic-gate * Generic operations vector support. 43237c478bd9Sstevel@tonic-gate * 43247c478bd9Sstevel@tonic-gate * This is used to build operations vectors for both the vfs and vnode. 43257c478bd9Sstevel@tonic-gate * It's normally called only when a file system is loaded. 43267c478bd9Sstevel@tonic-gate * 43277c478bd9Sstevel@tonic-gate * There are many possible algorithms for this, including the following: 43287c478bd9Sstevel@tonic-gate * 43297c478bd9Sstevel@tonic-gate * (1) scan the list of known operations; for each, see if the file system 43307c478bd9Sstevel@tonic-gate * includes an entry for it, and fill it in as appropriate. 43317c478bd9Sstevel@tonic-gate * 43327c478bd9Sstevel@tonic-gate * (2) set up defaults for all known operations. scan the list of ops 43337c478bd9Sstevel@tonic-gate * supplied by the file system; for each which is both supplied and 43347c478bd9Sstevel@tonic-gate * known, fill it in. 43357c478bd9Sstevel@tonic-gate * 43367c478bd9Sstevel@tonic-gate * (3) sort the lists of known ops & supplied ops; scan the list, filling 43377c478bd9Sstevel@tonic-gate * in entries as we go. 43387c478bd9Sstevel@tonic-gate * 43397c478bd9Sstevel@tonic-gate * we choose (1) for simplicity, and because performance isn't critical here. 43407c478bd9Sstevel@tonic-gate * note that (2) could be sped up using a precomputed hash table on known ops. 43417c478bd9Sstevel@tonic-gate * (3) could be faster than either, but only if the lists were very large or 43427c478bd9Sstevel@tonic-gate * supplied in sorted order. 43437c478bd9Sstevel@tonic-gate * 43447c478bd9Sstevel@tonic-gate */ 43457c478bd9Sstevel@tonic-gate 43467c478bd9Sstevel@tonic-gate int 43477c478bd9Sstevel@tonic-gate fs_build_vector(void *vector, int *unused_ops, 43487c478bd9Sstevel@tonic-gate const fs_operation_trans_def_t *translation, 43497c478bd9Sstevel@tonic-gate const fs_operation_def_t *operations) 43507c478bd9Sstevel@tonic-gate { 43517c478bd9Sstevel@tonic-gate int i, num_trans, num_ops, used; 43527c478bd9Sstevel@tonic-gate 4353aa59c4cbSrsb /* 4354aa59c4cbSrsb * Count the number of translations and the number of supplied 4355aa59c4cbSrsb * operations. 4356aa59c4cbSrsb */ 43577c478bd9Sstevel@tonic-gate 43587c478bd9Sstevel@tonic-gate { 43597c478bd9Sstevel@tonic-gate const fs_operation_trans_def_t *p; 43607c478bd9Sstevel@tonic-gate 43617c478bd9Sstevel@tonic-gate for (num_trans = 0, p = translation; 43627c478bd9Sstevel@tonic-gate p->name != NULL; 43637c478bd9Sstevel@tonic-gate num_trans++, p++) 43647c478bd9Sstevel@tonic-gate ; 43657c478bd9Sstevel@tonic-gate } 43667c478bd9Sstevel@tonic-gate 43677c478bd9Sstevel@tonic-gate { 43687c478bd9Sstevel@tonic-gate const fs_operation_def_t *p; 43697c478bd9Sstevel@tonic-gate 43707c478bd9Sstevel@tonic-gate for (num_ops = 0, p = operations; 43717c478bd9Sstevel@tonic-gate p->name != NULL; 43727c478bd9Sstevel@tonic-gate num_ops++, p++) 43737c478bd9Sstevel@tonic-gate ; 43747c478bd9Sstevel@tonic-gate } 43757c478bd9Sstevel@tonic-gate 43767c478bd9Sstevel@tonic-gate /* Walk through each operation known to our caller. There will be */ 43777c478bd9Sstevel@tonic-gate /* one entry in the supplied "translation table" for each. */ 43787c478bd9Sstevel@tonic-gate 43797c478bd9Sstevel@tonic-gate used = 0; 43807c478bd9Sstevel@tonic-gate 43817c478bd9Sstevel@tonic-gate for (i = 0; i < num_trans; i++) { 43827c478bd9Sstevel@tonic-gate int j, found; 43837c478bd9Sstevel@tonic-gate char *curname; 43847c478bd9Sstevel@tonic-gate fs_generic_func_p result; 43857c478bd9Sstevel@tonic-gate fs_generic_func_p *location; 43867c478bd9Sstevel@tonic-gate 43877c478bd9Sstevel@tonic-gate curname = translation[i].name; 43887c478bd9Sstevel@tonic-gate 43897c478bd9Sstevel@tonic-gate /* Look for a matching operation in the list supplied by the */ 43907c478bd9Sstevel@tonic-gate /* file system. */ 43917c478bd9Sstevel@tonic-gate 43927c478bd9Sstevel@tonic-gate found = 0; 43937c478bd9Sstevel@tonic-gate 43947c478bd9Sstevel@tonic-gate for (j = 0; j < num_ops; j++) { 43957c478bd9Sstevel@tonic-gate if (strcmp(operations[j].name, curname) == 0) { 43967c478bd9Sstevel@tonic-gate used++; 43977c478bd9Sstevel@tonic-gate found = 1; 43987c478bd9Sstevel@tonic-gate break; 43997c478bd9Sstevel@tonic-gate } 44007c478bd9Sstevel@tonic-gate } 44017c478bd9Sstevel@tonic-gate 4402aa59c4cbSrsb /* 4403aa59c4cbSrsb * If the file system is using a "placeholder" for default 4404aa59c4cbSrsb * or error functions, grab the appropriate function out of 4405aa59c4cbSrsb * the translation table. If the file system didn't supply 4406aa59c4cbSrsb * this operation at all, use the default function. 4407aa59c4cbSrsb */ 44087c478bd9Sstevel@tonic-gate 44097c478bd9Sstevel@tonic-gate if (found) { 4410aa59c4cbSrsb result = operations[j].func.fs_generic; 44117c478bd9Sstevel@tonic-gate if (result == fs_default) { 44127c478bd9Sstevel@tonic-gate result = translation[i].defaultFunc; 44137c478bd9Sstevel@tonic-gate } else if (result == fs_error) { 44147c478bd9Sstevel@tonic-gate result = translation[i].errorFunc; 44157c478bd9Sstevel@tonic-gate } else if (result == NULL) { 44167c478bd9Sstevel@tonic-gate /* Null values are PROHIBITED */ 44177c478bd9Sstevel@tonic-gate return (EINVAL); 44187c478bd9Sstevel@tonic-gate } 44197c478bd9Sstevel@tonic-gate } else { 44207c478bd9Sstevel@tonic-gate result = translation[i].defaultFunc; 44217c478bd9Sstevel@tonic-gate } 44227c478bd9Sstevel@tonic-gate 44237c478bd9Sstevel@tonic-gate /* Now store the function into the operations vector. */ 44247c478bd9Sstevel@tonic-gate 44257c478bd9Sstevel@tonic-gate location = (fs_generic_func_p *) 44267c478bd9Sstevel@tonic-gate (((char *)vector) + translation[i].offset); 44277c478bd9Sstevel@tonic-gate 44287c478bd9Sstevel@tonic-gate *location = result; 44297c478bd9Sstevel@tonic-gate } 44307c478bd9Sstevel@tonic-gate 44317c478bd9Sstevel@tonic-gate *unused_ops = num_ops - used; 44327c478bd9Sstevel@tonic-gate 44337c478bd9Sstevel@tonic-gate return (0); 44347c478bd9Sstevel@tonic-gate } 44357c478bd9Sstevel@tonic-gate 44367c478bd9Sstevel@tonic-gate /* Placeholder functions, should never be called. */ 44377c478bd9Sstevel@tonic-gate 44387c478bd9Sstevel@tonic-gate int 44397c478bd9Sstevel@tonic-gate fs_error(void) 44407c478bd9Sstevel@tonic-gate { 44417c478bd9Sstevel@tonic-gate cmn_err(CE_PANIC, "fs_error called"); 44427c478bd9Sstevel@tonic-gate return (0); 44437c478bd9Sstevel@tonic-gate } 44447c478bd9Sstevel@tonic-gate 44457c478bd9Sstevel@tonic-gate int 44467c478bd9Sstevel@tonic-gate fs_default(void) 44477c478bd9Sstevel@tonic-gate { 44487c478bd9Sstevel@tonic-gate cmn_err(CE_PANIC, "fs_default called"); 44497c478bd9Sstevel@tonic-gate return (0); 44507c478bd9Sstevel@tonic-gate } 44517c478bd9Sstevel@tonic-gate 44527c478bd9Sstevel@tonic-gate #ifdef __sparc 44537c478bd9Sstevel@tonic-gate 44547c478bd9Sstevel@tonic-gate /* 44557c478bd9Sstevel@tonic-gate * Part of the implementation of booting off a mirrored root 44567c478bd9Sstevel@tonic-gate * involves a change of dev_t for the root device. To 44577c478bd9Sstevel@tonic-gate * accomplish this, first remove the existing hash table 44587c478bd9Sstevel@tonic-gate * entry for the root device, convert to the new dev_t, 44597c478bd9Sstevel@tonic-gate * then re-insert in the hash table at the head of the list. 44607c478bd9Sstevel@tonic-gate */ 44617c478bd9Sstevel@tonic-gate void 44627c478bd9Sstevel@tonic-gate vfs_root_redev(vfs_t *vfsp, dev_t ndev, int fstype) 44637c478bd9Sstevel@tonic-gate { 44647c478bd9Sstevel@tonic-gate vfs_list_lock(); 44657c478bd9Sstevel@tonic-gate 44667c478bd9Sstevel@tonic-gate vfs_hash_remove(vfsp); 44677c478bd9Sstevel@tonic-gate 44687c478bd9Sstevel@tonic-gate vfsp->vfs_dev = ndev; 44697c478bd9Sstevel@tonic-gate vfs_make_fsid(&vfsp->vfs_fsid, ndev, fstype); 44707c478bd9Sstevel@tonic-gate 44717c478bd9Sstevel@tonic-gate vfs_hash_add(vfsp, 1); 44727c478bd9Sstevel@tonic-gate 44737c478bd9Sstevel@tonic-gate vfs_list_unlock(); 44747c478bd9Sstevel@tonic-gate } 44757c478bd9Sstevel@tonic-gate 44767c478bd9Sstevel@tonic-gate #else /* x86 NEWBOOT */ 44777c478bd9Sstevel@tonic-gate 447806bbe1e0Sedp #if defined(__x86) 447906bbe1e0Sedp extern int hvmboot_rootconf(); 448006bbe1e0Sedp #endif /* __x86 */ 448106bbe1e0Sedp 44826cefaae1SJack Meng extern ib_boot_prop_t *iscsiboot_prop; 44836cefaae1SJack Meng 44847c478bd9Sstevel@tonic-gate int 44857c478bd9Sstevel@tonic-gate rootconf() 44867c478bd9Sstevel@tonic-gate { 44877c478bd9Sstevel@tonic-gate int error; 44887c478bd9Sstevel@tonic-gate struct vfssw *vsw; 44897c478bd9Sstevel@tonic-gate extern void pm_init(); 4490843e1988Sjohnlev char *fstyp, *fsmod; 44916cefaae1SJack Meng int ret = -1; 44927c478bd9Sstevel@tonic-gate 4493843e1988Sjohnlev getrootfs(&fstyp, &fsmod); 44947c478bd9Sstevel@tonic-gate 449506bbe1e0Sedp #if defined(__x86) 449606bbe1e0Sedp /* 449706bbe1e0Sedp * hvmboot_rootconf() is defined in the hvm_bootstrap misc module, 449806bbe1e0Sedp * which lives in /platform/i86hvm, and hence is only available when 449906bbe1e0Sedp * booted in an x86 hvm environment. If the hvm_bootstrap misc module 450006bbe1e0Sedp * is not available then the modstub for this function will return 0. 450106bbe1e0Sedp * If the hvm_bootstrap misc module is available it will be loaded 450206bbe1e0Sedp * and hvmboot_rootconf() will be invoked. 450306bbe1e0Sedp */ 450406bbe1e0Sedp if (error = hvmboot_rootconf()) 450506bbe1e0Sedp return (error); 450606bbe1e0Sedp #endif /* __x86 */ 450706bbe1e0Sedp 45087c478bd9Sstevel@tonic-gate if (error = clboot_rootconf()) 45097c478bd9Sstevel@tonic-gate return (error); 45107c478bd9Sstevel@tonic-gate 4511843e1988Sjohnlev if (modload("fs", fsmod) == -1) 4512843e1988Sjohnlev panic("Cannot _init %s module", fsmod); 45137c478bd9Sstevel@tonic-gate 45147c478bd9Sstevel@tonic-gate RLOCK_VFSSW(); 45157c478bd9Sstevel@tonic-gate vsw = vfs_getvfsswbyname(fstyp); 45167c478bd9Sstevel@tonic-gate RUNLOCK_VFSSW(); 451756c0b1daSPavel Filipensky if (vsw == NULL) { 451856c0b1daSPavel Filipensky cmn_err(CE_CONT, "Cannot find %s filesystem\n", fstyp); 451956c0b1daSPavel Filipensky return (ENXIO); 452056c0b1daSPavel Filipensky } 45217c478bd9Sstevel@tonic-gate VFS_INIT(rootvfs, &vsw->vsw_vfsops, 0); 45227c478bd9Sstevel@tonic-gate VFS_HOLD(rootvfs); 45237c478bd9Sstevel@tonic-gate 45247c478bd9Sstevel@tonic-gate /* always mount readonly first */ 45257c478bd9Sstevel@tonic-gate rootvfs->vfs_flag |= VFS_RDONLY; 45267c478bd9Sstevel@tonic-gate 45277c478bd9Sstevel@tonic-gate pm_init(); 45287c478bd9Sstevel@tonic-gate 45296cefaae1SJack Meng if (netboot && iscsiboot_prop) { 45306cefaae1SJack Meng cmn_err(CE_WARN, "NFS boot and iSCSI boot" 45316cefaae1SJack Meng " shouldn't happen in the same time"); 45326cefaae1SJack Meng return (EINVAL); 45336cefaae1SJack Meng } 45346cefaae1SJack Meng 4535dedec472SJack Meng if (netboot || iscsiboot_prop) { 45366cefaae1SJack Meng ret = strplumb(); 4537dedec472SJack Meng if (ret != 0) { 4538dedec472SJack Meng cmn_err(CE_WARN, "Cannot plumb network device %d", ret); 4539dedec472SJack Meng return (EFAULT); 4540dedec472SJack Meng } 4541dedec472SJack Meng } 45426cefaae1SJack Meng 45436cefaae1SJack Meng if ((ret == 0) && iscsiboot_prop) { 45446cefaae1SJack Meng ret = modload("drv", "iscsi"); 45456cefaae1SJack Meng /* -1 indicates fail */ 45466cefaae1SJack Meng if (ret == -1) { 45476cefaae1SJack Meng cmn_err(CE_WARN, "Failed to load iscsi module"); 45486cefaae1SJack Meng iscsi_boot_prop_free(); 45496cefaae1SJack Meng return (EINVAL); 45506cefaae1SJack Meng } else { 45516cefaae1SJack Meng if (!i_ddi_attach_pseudo_node("iscsi")) { 45526cefaae1SJack Meng cmn_err(CE_WARN, 45536cefaae1SJack Meng "Failed to attach iscsi driver"); 45546cefaae1SJack Meng iscsi_boot_prop_free(); 45556cefaae1SJack Meng return (ENODEV); 45566cefaae1SJack Meng } 45576cefaae1SJack Meng } 45586cefaae1SJack Meng } 45597c478bd9Sstevel@tonic-gate 45607c478bd9Sstevel@tonic-gate error = VFS_MOUNTROOT(rootvfs, ROOT_INIT); 45617c478bd9Sstevel@tonic-gate vfs_unrefvfssw(vsw); 45627c478bd9Sstevel@tonic-gate rootdev = rootvfs->vfs_dev; 45637c478bd9Sstevel@tonic-gate 45647c478bd9Sstevel@tonic-gate if (error) 456556c0b1daSPavel Filipensky cmn_err(CE_CONT, "Cannot mount root on %s fstype %s\n", 456656c0b1daSPavel Filipensky rootfs.bo_name, fstyp); 456756c0b1daSPavel Filipensky else 456856c0b1daSPavel Filipensky cmn_err(CE_CONT, "?root on %s fstype %s\n", 456956c0b1daSPavel Filipensky rootfs.bo_name, fstyp); 45707c478bd9Sstevel@tonic-gate return (error); 45717c478bd9Sstevel@tonic-gate } 45727c478bd9Sstevel@tonic-gate 45737c478bd9Sstevel@tonic-gate /* 45747c478bd9Sstevel@tonic-gate * XXX this is called by nfs only and should probably be removed 45757c478bd9Sstevel@tonic-gate * If booted with ASKNAME, prompt on the console for a filesystem 45767c478bd9Sstevel@tonic-gate * name and return it. 45777c478bd9Sstevel@tonic-gate */ 45787c478bd9Sstevel@tonic-gate void 45797c478bd9Sstevel@tonic-gate getfsname(char *askfor, char *name, size_t namelen) 45807c478bd9Sstevel@tonic-gate { 45817c478bd9Sstevel@tonic-gate if (boothowto & RB_ASKNAME) { 45827c478bd9Sstevel@tonic-gate printf("%s name: ", askfor); 45837c478bd9Sstevel@tonic-gate console_gets(name, namelen); 45847c478bd9Sstevel@tonic-gate } 45857c478bd9Sstevel@tonic-gate } 45867c478bd9Sstevel@tonic-gate 45877c478bd9Sstevel@tonic-gate /* 458856c0b1daSPavel Filipensky * Init the root filesystem type (rootfs.bo_fstype) from the "fstype" 458956c0b1daSPavel Filipensky * property. 459056c0b1daSPavel Filipensky * 459156c0b1daSPavel Filipensky * Filesystem types starting with the prefix "nfs" are diskless clients; 459256c0b1daSPavel Filipensky * init the root filename name (rootfs.bo_name), too. 459356c0b1daSPavel Filipensky * 459456c0b1daSPavel Filipensky * If we are booting via NFS we currently have these options: 459556c0b1daSPavel Filipensky * nfs - dynamically choose NFS V2, V3, or V4 (default) 459656c0b1daSPavel Filipensky * nfs2 - force NFS V2 459756c0b1daSPavel Filipensky * nfs3 - force NFS V3 459856c0b1daSPavel Filipensky * nfs4 - force NFS V4 459956c0b1daSPavel Filipensky * Because we need to maintain backward compatibility with the naming 460056c0b1daSPavel Filipensky * convention that the NFS V2 filesystem name is "nfs" (see vfs_conf.c) 460156c0b1daSPavel Filipensky * we need to map "nfs" => "nfsdyn" and "nfs2" => "nfs". The dynamic 460256c0b1daSPavel Filipensky * nfs module will map the type back to either "nfs", "nfs3", or "nfs4". 4603bd93c05dSAlexander Eremin * This is only for root filesystems, all other uses will expect 4604bd93c05dSAlexander Eremin * that "nfs" == NFS V2. 46057c478bd9Sstevel@tonic-gate */ 4606843e1988Sjohnlev static void 4607843e1988Sjohnlev getrootfs(char **fstypp, char **fsmodp) 46087c478bd9Sstevel@tonic-gate { 46097c478bd9Sstevel@tonic-gate char *propstr = NULL; 46107c478bd9Sstevel@tonic-gate 461156c0b1daSPavel Filipensky /* 461256c0b1daSPavel Filipensky * Check fstype property; for diskless it should be one of "nfs", 461356c0b1daSPavel Filipensky * "nfs2", "nfs3" or "nfs4". 461456c0b1daSPavel Filipensky */ 46157c478bd9Sstevel@tonic-gate if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(), 46167c478bd9Sstevel@tonic-gate DDI_PROP_DONTPASS, "fstype", &propstr) 46177c478bd9Sstevel@tonic-gate == DDI_SUCCESS) { 46187c478bd9Sstevel@tonic-gate (void) strncpy(rootfs.bo_fstype, propstr, BO_MAXFSNAME); 46197c478bd9Sstevel@tonic-gate ddi_prop_free(propstr); 4620b1b8ab34Slling 4621b1b8ab34Slling /* 4622b1b8ab34Slling * if the boot property 'fstype' is not set, but 'zfs-bootfs' is set, 4623b1b8ab34Slling * assume the type of this root filesystem is 'zfs'. 4624b1b8ab34Slling */ 4625b1b8ab34Slling } else if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(), 4626b1b8ab34Slling DDI_PROP_DONTPASS, "zfs-bootfs", &propstr) 4627b1b8ab34Slling == DDI_SUCCESS) { 4628b1b8ab34Slling (void) strncpy(rootfs.bo_fstype, "zfs", BO_MAXFSNAME); 4629b1b8ab34Slling ddi_prop_free(propstr); 46307c478bd9Sstevel@tonic-gate } 46317c478bd9Sstevel@tonic-gate 4632843e1988Sjohnlev if (strncmp(rootfs.bo_fstype, "nfs", 3) != 0) { 4633843e1988Sjohnlev *fstypp = *fsmodp = rootfs.bo_fstype; 4634843e1988Sjohnlev return; 4635843e1988Sjohnlev } 46367c478bd9Sstevel@tonic-gate 46377c478bd9Sstevel@tonic-gate ++netboot; 463856c0b1daSPavel Filipensky 463956c0b1daSPavel Filipensky if (strcmp(rootfs.bo_fstype, "nfs2") == 0) 464056c0b1daSPavel Filipensky (void) strcpy(rootfs.bo_fstype, "nfs"); 464156c0b1daSPavel Filipensky else if (strcmp(rootfs.bo_fstype, "nfs") == 0) 464256c0b1daSPavel Filipensky (void) strcpy(rootfs.bo_fstype, "nfsdyn"); 464356c0b1daSPavel Filipensky 4644843e1988Sjohnlev /* 4645843e1988Sjohnlev * check if path to network interface is specified in bootpath 4646843e1988Sjohnlev * or by a hypervisor domain configuration file. 4647843e1988Sjohnlev * XXPV - enable strlumb_get_netdev_path() 4648843e1988Sjohnlev */ 4649843e1988Sjohnlev if (ddi_prop_exists(DDI_DEV_T_ANY, ddi_root_node(), DDI_PROP_DONTPASS, 4650843e1988Sjohnlev "xpv-nfsroot")) { 4651843e1988Sjohnlev (void) strcpy(rootfs.bo_name, "/xpvd/xnf@0"); 4652843e1988Sjohnlev } else if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(), 46537c478bd9Sstevel@tonic-gate DDI_PROP_DONTPASS, "bootpath", &propstr) 46547c478bd9Sstevel@tonic-gate == DDI_SUCCESS) { 46557c478bd9Sstevel@tonic-gate (void) strncpy(rootfs.bo_name, propstr, BO_MAXOBJNAME); 46567c478bd9Sstevel@tonic-gate ddi_prop_free(propstr); 46577c478bd9Sstevel@tonic-gate } else { 4658c2c0835aSToomas Soome rootfs.bo_name[0] = '\0'; 46597c478bd9Sstevel@tonic-gate } 4660843e1988Sjohnlev *fstypp = rootfs.bo_fstype; 4661843e1988Sjohnlev *fsmodp = "nfs"; 46627c478bd9Sstevel@tonic-gate } 46637c478bd9Sstevel@tonic-gate #endif 4664da6c28aaSamw 4665da6c28aaSamw /* 4666da6c28aaSamw * VFS feature routines 4667da6c28aaSamw */ 4668da6c28aaSamw 4669da6c28aaSamw #define VFTINDEX(feature) (((feature) >> 32) & 0xFFFFFFFF) 4670da6c28aaSamw #define VFTBITS(feature) ((feature) & 0xFFFFFFFFLL) 4671da6c28aaSamw 4672da6c28aaSamw /* Register a feature in the vfs */ 4673da6c28aaSamw void 4674da6c28aaSamw vfs_set_feature(vfs_t *vfsp, vfs_feature_t feature) 4675da6c28aaSamw { 4676da6c28aaSamw /* Note that vfs_featureset[] is found in *vfsp->vfs_implp */ 4677da6c28aaSamw if (vfsp->vfs_implp == NULL) 4678da6c28aaSamw return; 4679da6c28aaSamw 4680da6c28aaSamw vfsp->vfs_featureset[VFTINDEX(feature)] |= VFTBITS(feature); 4681da6c28aaSamw } 4682da6c28aaSamw 468344bffe01SMark Shellenbaum void 468444bffe01SMark Shellenbaum vfs_clear_feature(vfs_t *vfsp, vfs_feature_t feature) 468544bffe01SMark Shellenbaum { 468644bffe01SMark Shellenbaum /* Note that vfs_featureset[] is found in *vfsp->vfs_implp */ 468744bffe01SMark Shellenbaum if (vfsp->vfs_implp == NULL) 468844bffe01SMark Shellenbaum return; 468944bffe01SMark Shellenbaum vfsp->vfs_featureset[VFTINDEX(feature)] &= VFTBITS(~feature); 469044bffe01SMark Shellenbaum } 469144bffe01SMark Shellenbaum 4692da6c28aaSamw /* 4693da6c28aaSamw * Query a vfs for a feature. 4694da6c28aaSamw * Returns 1 if feature is present, 0 if not 4695da6c28aaSamw */ 4696da6c28aaSamw int 4697da6c28aaSamw vfs_has_feature(vfs_t *vfsp, vfs_feature_t feature) 4698da6c28aaSamw { 4699da6c28aaSamw int ret = 0; 4700da6c28aaSamw 4701da6c28aaSamw /* Note that vfs_featureset[] is found in *vfsp->vfs_implp */ 4702da6c28aaSamw if (vfsp->vfs_implp == NULL) 4703da6c28aaSamw return (ret); 4704da6c28aaSamw 4705da6c28aaSamw if (vfsp->vfs_featureset[VFTINDEX(feature)] & VFTBITS(feature)) 4706da6c28aaSamw ret = 1; 4707da6c28aaSamw 4708da6c28aaSamw return (ret); 4709da6c28aaSamw } 471079a28c7aSmarks 471179a28c7aSmarks /* 471279a28c7aSmarks * Propagate feature set from one vfs to another 471379a28c7aSmarks */ 471479a28c7aSmarks void 471579a28c7aSmarks vfs_propagate_features(vfs_t *from, vfs_t *to) 471679a28c7aSmarks { 471779a28c7aSmarks int i; 471879a28c7aSmarks 471979a28c7aSmarks if (to->vfs_implp == NULL || from->vfs_implp == NULL) 472079a28c7aSmarks return; 472179a28c7aSmarks 472279a28c7aSmarks for (i = 1; i <= to->vfs_featureset[0]; i++) { 472379a28c7aSmarks to->vfs_featureset[i] = from->vfs_featureset[i]; 472479a28c7aSmarks } 472579a28c7aSmarks } 472693239addSjohnlev 47270fbb751dSJohn Levon #define LOFINODE_PATH "/dev/lofi/%d" 472893239addSjohnlev 472993239addSjohnlev /* 473093239addSjohnlev * Return the vnode for the lofi node if there's a lofi mount in place. 473193239addSjohnlev * Returns -1 when there's no lofi node, 0 on success, and > 0 on 473293239addSjohnlev * failure. 473393239addSjohnlev */ 473493239addSjohnlev int 473593239addSjohnlev vfs_get_lofi(vfs_t *vfsp, vnode_t **vpp) 473693239addSjohnlev { 473793239addSjohnlev char *path = NULL; 473893239addSjohnlev int strsize; 473993239addSjohnlev int err; 474093239addSjohnlev 4741406fc510SToomas Soome if (vfsp->vfs_lofi_id == 0) { 474293239addSjohnlev *vpp = NULL; 474393239addSjohnlev return (-1); 474493239addSjohnlev } 474593239addSjohnlev 4746406fc510SToomas Soome strsize = snprintf(NULL, 0, LOFINODE_PATH, vfsp->vfs_lofi_id); 474793239addSjohnlev path = kmem_alloc(strsize + 1, KM_SLEEP); 4748406fc510SToomas Soome (void) snprintf(path, strsize + 1, LOFINODE_PATH, vfsp->vfs_lofi_id); 47490fbb751dSJohn Levon 47500fbb751dSJohn Levon /* 47510fbb751dSJohn Levon * We may be inside a zone, so we need to use the /dev path, but 47520fbb751dSJohn Levon * it's created asynchronously, so we wait here. 47530fbb751dSJohn Levon */ 47540fbb751dSJohn Levon for (;;) { 47550fbb751dSJohn Levon err = lookupname(path, UIO_SYSSPACE, FOLLOW, NULLVPP, vpp); 47560fbb751dSJohn Levon 47570fbb751dSJohn Levon if (err != ENOENT) 47580fbb751dSJohn Levon break; 475993239addSjohnlev 47600fbb751dSJohn Levon if ((err = delay_sig(hz / 8)) == EINTR) 47610fbb751dSJohn Levon break; 47620fbb751dSJohn Levon } 476393239addSjohnlev 476493239addSjohnlev if (err) 476593239addSjohnlev *vpp = NULL; 476693239addSjohnlev 476793239addSjohnlev kmem_free(path, strsize + 1); 476893239addSjohnlev return (err); 476993239addSjohnlev } 4770