1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5736b9155Smarks * Common Development and Distribution License (the "License"). 6736b9155Smarks * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22ac05c741SMark Maybee * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 2675c76197Speteh /* Portions Copyright 2007 Jeremy Teo */ 2775c76197Speteh 28fa9e4066Sahrens #include <sys/types.h> 29fa9e4066Sahrens #include <sys/param.h> 30fa9e4066Sahrens #include <sys/time.h> 31fa9e4066Sahrens #include <sys/systm.h> 32fa9e4066Sahrens #include <sys/sysmacros.h> 33fa9e4066Sahrens #include <sys/resource.h> 34fa9e4066Sahrens #include <sys/vfs.h> 35aa59c4cbSrsb #include <sys/vfs_opreg.h> 36fa9e4066Sahrens #include <sys/vnode.h> 37fa9e4066Sahrens #include <sys/file.h> 38fa9e4066Sahrens #include <sys/stat.h> 39fa9e4066Sahrens #include <sys/kmem.h> 40fa9e4066Sahrens #include <sys/taskq.h> 41fa9e4066Sahrens #include <sys/uio.h> 42fa9e4066Sahrens #include <sys/vmsystm.h> 43fa9e4066Sahrens #include <sys/atomic.h> 4444eda4d7Smaybee #include <sys/vm.h> 45fa9e4066Sahrens #include <vm/seg_vn.h> 46fa9e4066Sahrens #include <vm/pvn.h> 47fa9e4066Sahrens #include <vm/as.h> 480fab61baSJonathan W Adams #include <vm/kpm.h> 490fab61baSJonathan W Adams #include <vm/seg_kpm.h> 50fa9e4066Sahrens #include <sys/mman.h> 51fa9e4066Sahrens #include <sys/pathname.h> 52fa9e4066Sahrens #include <sys/cmn_err.h> 53fa9e4066Sahrens #include <sys/errno.h> 54fa9e4066Sahrens #include <sys/unistd.h> 55fa9e4066Sahrens #include <sys/zfs_dir.h> 56fa9e4066Sahrens #include <sys/zfs_acl.h> 57fa9e4066Sahrens #include <sys/zfs_ioctl.h> 58fa9e4066Sahrens #include <sys/fs/zfs.h> 59fa9e4066Sahrens #include <sys/dmu.h> 60fa9e4066Sahrens #include <sys/spa.h> 61fa9e4066Sahrens #include <sys/txg.h> 62fa9e4066Sahrens #include <sys/dbuf.h> 63fa9e4066Sahrens #include <sys/zap.h> 64fa9e4066Sahrens #include <sys/dirent.h> 65fa9e4066Sahrens #include <sys/policy.h> 66fa9e4066Sahrens #include <sys/sunddi.h> 67fa9e4066Sahrens #include <sys/filio.h> 68c1ce5987SMark Shellenbaum #include <sys/sid.h> 69fa9e4066Sahrens #include "fs/fs_subr.h" 70fa9e4066Sahrens #include <sys/zfs_ctldir.h> 71da6c28aaSamw #include <sys/zfs_fuid.h> 72033f9833Sek #include <sys/dnlc.h> 73104e2ed7Sperrin #include <sys/zfs_rlock.h> 74da6c28aaSamw #include <sys/extdirent.h> 75da6c28aaSamw #include <sys/kidmap.h> 76da6c28aaSamw #include <sys/cred_impl.h> 77b38f0970Sck #include <sys/attr.h> 78fa9e4066Sahrens 79fa9e4066Sahrens /* 80fa9e4066Sahrens * Programming rules. 81fa9e4066Sahrens * 82fa9e4066Sahrens * Each vnode op performs some logical unit of work. To do this, the ZPL must 83fa9e4066Sahrens * properly lock its in-core state, create a DMU transaction, do the work, 84fa9e4066Sahrens * record this work in the intent log (ZIL), commit the DMU transaction, 85da6c28aaSamw * and wait for the intent log to commit if it is a synchronous operation. 86da6c28aaSamw * Moreover, the vnode ops must work in both normal and log replay context. 87fa9e4066Sahrens * The ordering of events is important to avoid deadlocks and references 88fa9e4066Sahrens * to freed memory. The example below illustrates the following Big Rules: 89fa9e4066Sahrens * 90fa9e4066Sahrens * (1) A check must be made in each zfs thread for a mounted file system. 913cb34c60Sahrens * This is done avoiding races using ZFS_ENTER(zfsvfs). 923cb34c60Sahrens * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes 933cb34c60Sahrens * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros 943cb34c60Sahrens * can return EIO from the calling function. 95fa9e4066Sahrens * 96fa9e4066Sahrens * (2) VN_RELE() should always be the last thing except for zil_commit() 97b19a79ecSperrin * (if necessary) and ZFS_EXIT(). This is for 3 reasons: 98fa9e4066Sahrens * First, if it's the last reference, the vnode/znode 99fa9e4066Sahrens * can be freed, so the zp may point to freed memory. Second, the last 100fa9e4066Sahrens * reference will call zfs_zinactive(), which may induce a lot of work -- 101104e2ed7Sperrin * pushing cached pages (which acquires range locks) and syncing out 102fa9e4066Sahrens * cached atime changes. Third, zfs_zinactive() may require a new tx, 103fa9e4066Sahrens * which could deadlock the system if you were already holding one. 1049d3574bfSNeil Perrin * If you must call VN_RELE() within a tx then use VN_RELE_ASYNC(). 105fa9e4066Sahrens * 1067885c754Sperrin * (3) All range locks must be grabbed before calling dmu_tx_assign(), 1077885c754Sperrin * as they can span dmu_tx_assign() calls. 1087885c754Sperrin * 1091209a471SNeil Perrin * (4) Always pass TXG_NOWAIT as the second argument to dmu_tx_assign(). 110fa9e4066Sahrens * This is critical because we don't want to block while holding locks. 111fa9e4066Sahrens * Note, in particular, that if a lock is sometimes acquired before 112fa9e4066Sahrens * the tx assigns, and sometimes after (e.g. z_lock), then failing to 113fa9e4066Sahrens * use a non-blocking assign can deadlock the system. The scenario: 114fa9e4066Sahrens * 115fa9e4066Sahrens * Thread A has grabbed a lock before calling dmu_tx_assign(). 116fa9e4066Sahrens * Thread B is in an already-assigned tx, and blocks for this lock. 117fa9e4066Sahrens * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 118fa9e4066Sahrens * forever, because the previous txg can't quiesce until B's tx commits. 119fa9e4066Sahrens * 120fa9e4066Sahrens * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 1218a2f1b91Sahrens * then drop all locks, call dmu_tx_wait(), and try again. 122fa9e4066Sahrens * 1237885c754Sperrin * (5) If the operation succeeded, generate the intent log entry for it 124fa9e4066Sahrens * before dropping locks. This ensures that the ordering of events 125fa9e4066Sahrens * in the intent log matches the order in which they actually occurred. 1261209a471SNeil Perrin * During ZIL replay the zfs_log_* functions will update the sequence 1271209a471SNeil Perrin * number to indicate the zil transaction has replayed. 128fa9e4066Sahrens * 1297885c754Sperrin * (6) At the end of each vnode op, the DMU tx must always commit, 130fa9e4066Sahrens * regardless of whether there were any errors. 131fa9e4066Sahrens * 132b19a79ecSperrin * (7) After dropping all locks, invoke zil_commit(zilog, seq, foid) 133fa9e4066Sahrens * to ensure that synchronous semantics are provided when necessary. 134fa9e4066Sahrens * 135fa9e4066Sahrens * In general, this is how things should be ordered in each vnode op: 136fa9e4066Sahrens * 137fa9e4066Sahrens * ZFS_ENTER(zfsvfs); // exit if unmounted 138fa9e4066Sahrens * top: 139fa9e4066Sahrens * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 140fa9e4066Sahrens * rw_enter(...); // grab any other locks you need 141fa9e4066Sahrens * tx = dmu_tx_create(...); // get DMU tx 142fa9e4066Sahrens * dmu_tx_hold_*(); // hold each object you might modify 1431209a471SNeil Perrin * error = dmu_tx_assign(tx, TXG_NOWAIT); // try to assign 144fa9e4066Sahrens * if (error) { 145fa9e4066Sahrens * rw_exit(...); // drop locks 146fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 147fa9e4066Sahrens * VN_RELE(...); // release held vnodes 1481209a471SNeil Perrin * if (error == ERESTART) { 1498a2f1b91Sahrens * dmu_tx_wait(tx); 1508a2f1b91Sahrens * dmu_tx_abort(tx); 151fa9e4066Sahrens * goto top; 152fa9e4066Sahrens * } 1538a2f1b91Sahrens * dmu_tx_abort(tx); // abort DMU tx 154fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 155fa9e4066Sahrens * return (error); // really out of space 156fa9e4066Sahrens * } 157fa9e4066Sahrens * error = do_real_work(); // do whatever this VOP does 158fa9e4066Sahrens * if (error == 0) 159b19a79ecSperrin * zfs_log_*(...); // on success, make ZIL entry 160fa9e4066Sahrens * dmu_tx_commit(tx); // commit DMU tx -- error or not 161fa9e4066Sahrens * rw_exit(...); // drop locks 162fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 163fa9e4066Sahrens * VN_RELE(...); // release held vnodes 164b19a79ecSperrin * zil_commit(zilog, seq, foid); // synchronous when necessary 165fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 166fa9e4066Sahrens * return (error); // done, report error 167fa9e4066Sahrens */ 1683cb34c60Sahrens 169fa9e4066Sahrens /* ARGSUSED */ 170fa9e4066Sahrens static int 171da6c28aaSamw zfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) 172fa9e4066Sahrens { 17367bd71c6Sperrin znode_t *zp = VTOZ(*vpp); 174b614fdaaSMark Shellenbaum zfsvfs_t *zfsvfs = zp->z_zfsvfs; 175b614fdaaSMark Shellenbaum 176b614fdaaSMark Shellenbaum ZFS_ENTER(zfsvfs); 177b614fdaaSMark Shellenbaum ZFS_VERIFY_ZP(zp); 17867bd71c6Sperrin 179da6c28aaSamw if ((flag & FWRITE) && (zp->z_phys->zp_flags & ZFS_APPENDONLY) && 180da6c28aaSamw ((flag & FAPPEND) == 0)) { 181b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 182da6c28aaSamw return (EPERM); 183da6c28aaSamw } 184da6c28aaSamw 185da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 186da6c28aaSamw ZTOV(zp)->v_type == VREG && 187da6c28aaSamw !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) && 188b614fdaaSMark Shellenbaum zp->z_phys->zp_size > 0) { 189b614fdaaSMark Shellenbaum if (fs_vscan(*vpp, cr, 0) != 0) { 190b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 191da6c28aaSamw return (EACCES); 192b614fdaaSMark Shellenbaum } 193b614fdaaSMark Shellenbaum } 194da6c28aaSamw 19567bd71c6Sperrin /* Keep a count of the synchronous opens in the znode */ 19667bd71c6Sperrin if (flag & (FSYNC | FDSYNC)) 19767bd71c6Sperrin atomic_inc_32(&zp->z_sync_cnt); 198da6c28aaSamw 199b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 200fa9e4066Sahrens return (0); 201fa9e4066Sahrens } 202fa9e4066Sahrens 203fa9e4066Sahrens /* ARGSUSED */ 204fa9e4066Sahrens static int 205da6c28aaSamw zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, 206da6c28aaSamw caller_context_t *ct) 207fa9e4066Sahrens { 20867bd71c6Sperrin znode_t *zp = VTOZ(vp); 209b614fdaaSMark Shellenbaum zfsvfs_t *zfsvfs = zp->z_zfsvfs; 210b614fdaaSMark Shellenbaum 211b614fdaaSMark Shellenbaum ZFS_ENTER(zfsvfs); 212b614fdaaSMark Shellenbaum ZFS_VERIFY_ZP(zp); 21367bd71c6Sperrin 21467bd71c6Sperrin /* Decrement the synchronous opens in the znode */ 215ecb72030Sperrin if ((flag & (FSYNC | FDSYNC)) && (count == 1)) 21667bd71c6Sperrin atomic_dec_32(&zp->z_sync_cnt); 21767bd71c6Sperrin 218fa9e4066Sahrens /* 219fa9e4066Sahrens * Clean up any locks held by this process on the vp. 220fa9e4066Sahrens */ 221fa9e4066Sahrens cleanlocks(vp, ddi_get_pid(), 0); 222fa9e4066Sahrens cleanshares(vp, ddi_get_pid()); 223fa9e4066Sahrens 224da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 225da6c28aaSamw ZTOV(zp)->v_type == VREG && 226da6c28aaSamw !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) && 227da6c28aaSamw zp->z_phys->zp_size > 0) 228da6c28aaSamw VERIFY(fs_vscan(vp, cr, 1) == 0); 229da6c28aaSamw 230b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 231fa9e4066Sahrens return (0); 232fa9e4066Sahrens } 233fa9e4066Sahrens 234fa9e4066Sahrens /* 235fa9e4066Sahrens * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 236fa9e4066Sahrens * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 237fa9e4066Sahrens */ 238fa9e4066Sahrens static int 239fa9e4066Sahrens zfs_holey(vnode_t *vp, int cmd, offset_t *off) 240fa9e4066Sahrens { 241fa9e4066Sahrens znode_t *zp = VTOZ(vp); 242fa9e4066Sahrens uint64_t noff = (uint64_t)*off; /* new offset */ 243fa9e4066Sahrens uint64_t file_sz; 244fa9e4066Sahrens int error; 245fa9e4066Sahrens boolean_t hole; 246fa9e4066Sahrens 247fa9e4066Sahrens file_sz = zp->z_phys->zp_size; 248fa9e4066Sahrens if (noff >= file_sz) { 249fa9e4066Sahrens return (ENXIO); 250fa9e4066Sahrens } 251fa9e4066Sahrens 252fa9e4066Sahrens if (cmd == _FIO_SEEK_HOLE) 253fa9e4066Sahrens hole = B_TRUE; 254fa9e4066Sahrens else 255fa9e4066Sahrens hole = B_FALSE; 256fa9e4066Sahrens 257fa9e4066Sahrens error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 258fa9e4066Sahrens 259fa9e4066Sahrens /* end of file? */ 260fa9e4066Sahrens if ((error == ESRCH) || (noff > file_sz)) { 261fa9e4066Sahrens /* 262fa9e4066Sahrens * Handle the virtual hole at the end of file. 263fa9e4066Sahrens */ 264fa9e4066Sahrens if (hole) { 265fa9e4066Sahrens *off = file_sz; 266fa9e4066Sahrens return (0); 267fa9e4066Sahrens } 268fa9e4066Sahrens return (ENXIO); 269fa9e4066Sahrens } 270fa9e4066Sahrens 271fa9e4066Sahrens if (noff < *off) 272fa9e4066Sahrens return (error); 273fa9e4066Sahrens *off = noff; 274fa9e4066Sahrens return (error); 275fa9e4066Sahrens } 276fa9e4066Sahrens 277fa9e4066Sahrens /* ARGSUSED */ 278fa9e4066Sahrens static int 279fa9e4066Sahrens zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred, 280da6c28aaSamw int *rvalp, caller_context_t *ct) 281fa9e4066Sahrens { 282fa9e4066Sahrens offset_t off; 283fa9e4066Sahrens int error; 284fa9e4066Sahrens zfsvfs_t *zfsvfs; 285f18faf3fSek znode_t *zp; 286fa9e4066Sahrens 287fa9e4066Sahrens switch (com) { 288ecb72030Sperrin case _FIOFFS: 289fa9e4066Sahrens return (zfs_sync(vp->v_vfsp, 0, cred)); 290fa9e4066Sahrens 291ea8dc4b6Seschrock /* 292ea8dc4b6Seschrock * The following two ioctls are used by bfu. Faking out, 293ea8dc4b6Seschrock * necessary to avoid bfu errors. 294ea8dc4b6Seschrock */ 295ecb72030Sperrin case _FIOGDIO: 296ecb72030Sperrin case _FIOSDIO: 297ea8dc4b6Seschrock return (0); 298ea8dc4b6Seschrock 299ecb72030Sperrin case _FIO_SEEK_DATA: 300ecb72030Sperrin case _FIO_SEEK_HOLE: 301fa9e4066Sahrens if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 302fa9e4066Sahrens return (EFAULT); 303fa9e4066Sahrens 304f18faf3fSek zp = VTOZ(vp); 305f18faf3fSek zfsvfs = zp->z_zfsvfs; 3063cb34c60Sahrens ZFS_ENTER(zfsvfs); 3073cb34c60Sahrens ZFS_VERIFY_ZP(zp); 308fa9e4066Sahrens 309fa9e4066Sahrens /* offset parameter is in/out */ 310fa9e4066Sahrens error = zfs_holey(vp, com, &off); 311fa9e4066Sahrens ZFS_EXIT(zfsvfs); 312fa9e4066Sahrens if (error) 313fa9e4066Sahrens return (error); 314fa9e4066Sahrens if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 315fa9e4066Sahrens return (EFAULT); 316fa9e4066Sahrens return (0); 317fa9e4066Sahrens } 318fa9e4066Sahrens return (ENOTTY); 319fa9e4066Sahrens } 320fa9e4066Sahrens 3210fab61baSJonathan W Adams /* 3220fab61baSJonathan W Adams * Utility functions to map and unmap a single physical page. These 3230fab61baSJonathan W Adams * are used to manage the mappable copies of ZFS file data, and therefore 3240fab61baSJonathan W Adams * do not update ref/mod bits. 3250fab61baSJonathan W Adams */ 3260fab61baSJonathan W Adams caddr_t 3270fab61baSJonathan W Adams zfs_map_page(page_t *pp, enum seg_rw rw) 3280fab61baSJonathan W Adams { 3290fab61baSJonathan W Adams if (kpm_enable) 3300fab61baSJonathan W Adams return (hat_kpm_mapin(pp, 0)); 3310fab61baSJonathan W Adams ASSERT(rw == S_READ || rw == S_WRITE); 3320fab61baSJonathan W Adams return (ppmapin(pp, PROT_READ | ((rw == S_WRITE) ? PROT_WRITE : 0), 3330fab61baSJonathan W Adams (caddr_t)-1)); 3340fab61baSJonathan W Adams } 3350fab61baSJonathan W Adams 3360fab61baSJonathan W Adams void 3370fab61baSJonathan W Adams zfs_unmap_page(page_t *pp, caddr_t addr) 3380fab61baSJonathan W Adams { 3390fab61baSJonathan W Adams if (kpm_enable) { 3400fab61baSJonathan W Adams hat_kpm_mapout(pp, 0, addr); 3410fab61baSJonathan W Adams } else { 3420fab61baSJonathan W Adams ppmapout(addr); 3430fab61baSJonathan W Adams } 3440fab61baSJonathan W Adams } 3450fab61baSJonathan W Adams 346fa9e4066Sahrens /* 347fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 348fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 349fa9e4066Sahrens * 350fa9e4066Sahrens * On Write: If we find a memory mapped page, we write to *both* 351fa9e4066Sahrens * the page and the dmu buffer. 352fa9e4066Sahrens */ 353ac05c741SMark Maybee static void 354ac05c741SMark Maybee update_pages(vnode_t *vp, int64_t start, int len, objset_t *os, uint64_t oid) 355fa9e4066Sahrens { 356ac05c741SMark Maybee int64_t off; 357fa9e4066Sahrens 358fa9e4066Sahrens off = start & PAGEOFFSET; 359fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 360fa9e4066Sahrens page_t *pp; 361ac05c741SMark Maybee uint64_t nbytes = MIN(PAGESIZE - off, len); 362fa9e4066Sahrens 363fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 364fa9e4066Sahrens caddr_t va; 365fa9e4066Sahrens 3660fab61baSJonathan W Adams va = zfs_map_page(pp, S_WRITE); 367*7bfdf011SNeil Perrin (void) dmu_read(os, oid, start+off, nbytes, va+off, 368*7bfdf011SNeil Perrin DMU_READ_PREFETCH); 3690fab61baSJonathan W Adams zfs_unmap_page(pp, va); 370fa9e4066Sahrens page_unlock(pp); 371fa9e4066Sahrens } 372ac05c741SMark Maybee len -= nbytes; 373fa9e4066Sahrens off = 0; 374fa9e4066Sahrens } 375fa9e4066Sahrens } 376fa9e4066Sahrens 377fa9e4066Sahrens /* 378fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 379fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 380fa9e4066Sahrens * 381fa9e4066Sahrens * On Read: We "read" preferentially from memory mapped pages, 382fa9e4066Sahrens * else we default from the dmu buffer. 383fa9e4066Sahrens * 384fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 385fa9e4066Sahrens * the file is memory mapped. 386fa9e4066Sahrens */ 387fa9e4066Sahrens static int 388feb08c6bSbillm mappedread(vnode_t *vp, int nbytes, uio_t *uio) 389fa9e4066Sahrens { 390feb08c6bSbillm znode_t *zp = VTOZ(vp); 391feb08c6bSbillm objset_t *os = zp->z_zfsvfs->z_os; 392feb08c6bSbillm int64_t start, off; 393fa9e4066Sahrens int len = nbytes; 394fa9e4066Sahrens int error = 0; 395fa9e4066Sahrens 396fa9e4066Sahrens start = uio->uio_loffset; 397fa9e4066Sahrens off = start & PAGEOFFSET; 398fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 399fa9e4066Sahrens page_t *pp; 400feb08c6bSbillm uint64_t bytes = MIN(PAGESIZE - off, len); 401fa9e4066Sahrens 402fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 403fa9e4066Sahrens caddr_t va; 404fa9e4066Sahrens 4050fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 406fa9e4066Sahrens error = uiomove(va + off, bytes, UIO_READ, uio); 4070fab61baSJonathan W Adams zfs_unmap_page(pp, va); 408fa9e4066Sahrens page_unlock(pp); 409fa9e4066Sahrens } else { 410feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, bytes); 411fa9e4066Sahrens } 412fa9e4066Sahrens len -= bytes; 413fa9e4066Sahrens off = 0; 414fa9e4066Sahrens if (error) 415fa9e4066Sahrens break; 416fa9e4066Sahrens } 417fa9e4066Sahrens return (error); 418fa9e4066Sahrens } 419fa9e4066Sahrens 420feb08c6bSbillm offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 421fa9e4066Sahrens 422fa9e4066Sahrens /* 423fa9e4066Sahrens * Read bytes from specified file into supplied buffer. 424fa9e4066Sahrens * 425fa9e4066Sahrens * IN: vp - vnode of file to be read from. 426fa9e4066Sahrens * uio - structure supplying read location, range info, 427fa9e4066Sahrens * and return buffer. 428fa9e4066Sahrens * ioflag - SYNC flags; used to provide FRSYNC semantics. 429fa9e4066Sahrens * cr - credentials of caller. 430da6c28aaSamw * ct - caller context 431fa9e4066Sahrens * 432fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 433fa9e4066Sahrens * 434fa9e4066Sahrens * RETURN: 0 if success 435fa9e4066Sahrens * error code if failure 436fa9e4066Sahrens * 437fa9e4066Sahrens * Side Effects: 438fa9e4066Sahrens * vp - atime updated if byte count > 0 439fa9e4066Sahrens */ 440fa9e4066Sahrens /* ARGSUSED */ 441fa9e4066Sahrens static int 442fa9e4066Sahrens zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 443fa9e4066Sahrens { 444fa9e4066Sahrens znode_t *zp = VTOZ(vp); 445fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 446f18faf3fSek objset_t *os; 447feb08c6bSbillm ssize_t n, nbytes; 448feb08c6bSbillm int error; 449104e2ed7Sperrin rl_t *rl; 450fa9e4066Sahrens 4513cb34c60Sahrens ZFS_ENTER(zfsvfs); 4523cb34c60Sahrens ZFS_VERIFY_ZP(zp); 453f18faf3fSek os = zfsvfs->z_os; 454fa9e4066Sahrens 4550616c50eSmarks if (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) { 4560616c50eSmarks ZFS_EXIT(zfsvfs); 4570616c50eSmarks return (EACCES); 4580616c50eSmarks } 4590616c50eSmarks 460fa9e4066Sahrens /* 461fa9e4066Sahrens * Validate file offset 462fa9e4066Sahrens */ 463fa9e4066Sahrens if (uio->uio_loffset < (offset_t)0) { 464fa9e4066Sahrens ZFS_EXIT(zfsvfs); 465fa9e4066Sahrens return (EINVAL); 466fa9e4066Sahrens } 467fa9e4066Sahrens 468fa9e4066Sahrens /* 469fa9e4066Sahrens * Fasttrack empty reads 470fa9e4066Sahrens */ 471fa9e4066Sahrens if (uio->uio_resid == 0) { 472fa9e4066Sahrens ZFS_EXIT(zfsvfs); 473fa9e4066Sahrens return (0); 474fa9e4066Sahrens } 475fa9e4066Sahrens 476fa9e4066Sahrens /* 477104e2ed7Sperrin * Check for mandatory locks 478fa9e4066Sahrens */ 479fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode)) { 480fa9e4066Sahrens if (error = chklock(vp, FREAD, 481fa9e4066Sahrens uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 482fa9e4066Sahrens ZFS_EXIT(zfsvfs); 483fa9e4066Sahrens return (error); 484fa9e4066Sahrens } 485fa9e4066Sahrens } 486fa9e4066Sahrens 487fa9e4066Sahrens /* 488fa9e4066Sahrens * If we're in FRSYNC mode, sync out this znode before reading it. 489fa9e4066Sahrens */ 490b19a79ecSperrin if (ioflag & FRSYNC) 491b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 492fa9e4066Sahrens 493fa9e4066Sahrens /* 494104e2ed7Sperrin * Lock the range against changes. 495fa9e4066Sahrens */ 496104e2ed7Sperrin rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER); 497104e2ed7Sperrin 498fa9e4066Sahrens /* 499fa9e4066Sahrens * If we are reading past end-of-file we can skip 500fa9e4066Sahrens * to the end; but we might still need to set atime. 501fa9e4066Sahrens */ 502fa9e4066Sahrens if (uio->uio_loffset >= zp->z_phys->zp_size) { 503fa9e4066Sahrens error = 0; 504fa9e4066Sahrens goto out; 505fa9e4066Sahrens } 506fa9e4066Sahrens 507feb08c6bSbillm ASSERT(uio->uio_loffset < zp->z_phys->zp_size); 508feb08c6bSbillm n = MIN(uio->uio_resid, zp->z_phys->zp_size - uio->uio_loffset); 509feb08c6bSbillm 510feb08c6bSbillm while (n > 0) { 511feb08c6bSbillm nbytes = MIN(n, zfs_read_chunk_size - 512feb08c6bSbillm P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); 513fa9e4066Sahrens 514feb08c6bSbillm if (vn_has_cached_data(vp)) 515feb08c6bSbillm error = mappedread(vp, nbytes, uio); 516feb08c6bSbillm else 517feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, nbytes); 518b87f3af3Sperrin if (error) { 519b87f3af3Sperrin /* convert checksum errors into IO errors */ 520b87f3af3Sperrin if (error == ECKSUM) 521b87f3af3Sperrin error = EIO; 522feb08c6bSbillm break; 523b87f3af3Sperrin } 524fa9e4066Sahrens 525feb08c6bSbillm n -= nbytes; 526fa9e4066Sahrens } 527feb08c6bSbillm 528fa9e4066Sahrens out: 529c5c6ffa0Smaybee zfs_range_unlock(rl); 530fa9e4066Sahrens 531fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 532fa9e4066Sahrens ZFS_EXIT(zfsvfs); 533fa9e4066Sahrens return (error); 534fa9e4066Sahrens } 535fa9e4066Sahrens 536fa9e4066Sahrens /* 537fa9e4066Sahrens * Write the bytes to a file. 538fa9e4066Sahrens * 539fa9e4066Sahrens * IN: vp - vnode of file to be written to. 540fa9e4066Sahrens * uio - structure supplying write location, range info, 541fa9e4066Sahrens * and data buffer. 542fa9e4066Sahrens * ioflag - FAPPEND flag set if in append mode. 543fa9e4066Sahrens * cr - credentials of caller. 544da6c28aaSamw * ct - caller context (NFS/CIFS fem monitor only) 545fa9e4066Sahrens * 546fa9e4066Sahrens * OUT: uio - updated offset and range. 547fa9e4066Sahrens * 548fa9e4066Sahrens * RETURN: 0 if success 549fa9e4066Sahrens * error code if failure 550fa9e4066Sahrens * 551fa9e4066Sahrens * Timestamps: 552fa9e4066Sahrens * vp - ctime|mtime updated if byte count > 0 553fa9e4066Sahrens */ 554fa9e4066Sahrens /* ARGSUSED */ 555fa9e4066Sahrens static int 556fa9e4066Sahrens zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 557fa9e4066Sahrens { 558fa9e4066Sahrens znode_t *zp = VTOZ(vp); 559fa9e4066Sahrens rlim64_t limit = uio->uio_llimit; 560fa9e4066Sahrens ssize_t start_resid = uio->uio_resid; 561fa9e4066Sahrens ssize_t tx_bytes; 562fa9e4066Sahrens uint64_t end_size; 563fa9e4066Sahrens dmu_tx_t *tx; 564fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 565f18faf3fSek zilog_t *zilog; 566fa9e4066Sahrens offset_t woff; 567fa9e4066Sahrens ssize_t n, nbytes; 568104e2ed7Sperrin rl_t *rl; 569fa9e4066Sahrens int max_blksz = zfsvfs->z_max_blksz; 570c09193bfSmarks uint64_t pflags; 571104e2ed7Sperrin int error; 5722fdbea25SAleksandr Guzovskiy arc_buf_t *abuf; 573fa9e4066Sahrens 574fa9e4066Sahrens /* 575fa9e4066Sahrens * Fasttrack empty write 576fa9e4066Sahrens */ 577104e2ed7Sperrin n = start_resid; 578fa9e4066Sahrens if (n == 0) 579fa9e4066Sahrens return (0); 580fa9e4066Sahrens 581104e2ed7Sperrin if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 582104e2ed7Sperrin limit = MAXOFFSET_T; 583104e2ed7Sperrin 5843cb34c60Sahrens ZFS_ENTER(zfsvfs); 5853cb34c60Sahrens ZFS_VERIFY_ZP(zp); 586c09193bfSmarks 587c09193bfSmarks /* 588c09193bfSmarks * If immutable or not appending then return EPERM 589c09193bfSmarks */ 590c09193bfSmarks pflags = zp->z_phys->zp_flags; 591c09193bfSmarks if ((pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) || 592c09193bfSmarks ((pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) && 593c09193bfSmarks (uio->uio_loffset < zp->z_phys->zp_size))) { 594c09193bfSmarks ZFS_EXIT(zfsvfs); 595c09193bfSmarks return (EPERM); 596c09193bfSmarks } 597c09193bfSmarks 598f18faf3fSek zilog = zfsvfs->z_log; 599fa9e4066Sahrens 600fa9e4066Sahrens /* 601c5c6ffa0Smaybee * Pre-fault the pages to ensure slow (eg NFS) pages 602104e2ed7Sperrin * don't hold up txg. 603fa9e4066Sahrens */ 6046f5f1c63SDonghai Qiao uio_prefaultpages(n, uio); 605fa9e4066Sahrens 606fa9e4066Sahrens /* 607fa9e4066Sahrens * If in append mode, set the io offset pointer to eof. 608fa9e4066Sahrens */ 609104e2ed7Sperrin if (ioflag & FAPPEND) { 610104e2ed7Sperrin /* 611104e2ed7Sperrin * Range lock for a file append: 612104e2ed7Sperrin * The value for the start of range will be determined by 613104e2ed7Sperrin * zfs_range_lock() (to guarantee append semantics). 614104e2ed7Sperrin * If this write will cause the block size to increase, 615104e2ed7Sperrin * zfs_range_lock() will lock the entire file, so we must 616104e2ed7Sperrin * later reduce the range after we grow the block size. 617104e2ed7Sperrin */ 618104e2ed7Sperrin rl = zfs_range_lock(zp, 0, n, RL_APPEND); 619104e2ed7Sperrin if (rl->r_len == UINT64_MAX) { 620104e2ed7Sperrin /* overlocked, zp_size can't change */ 621104e2ed7Sperrin woff = uio->uio_loffset = zp->z_phys->zp_size; 622104e2ed7Sperrin } else { 623104e2ed7Sperrin woff = uio->uio_loffset = rl->r_off; 624104e2ed7Sperrin } 625fa9e4066Sahrens } else { 626fa9e4066Sahrens woff = uio->uio_loffset; 627fa9e4066Sahrens /* 628fa9e4066Sahrens * Validate file offset 629fa9e4066Sahrens */ 630fa9e4066Sahrens if (woff < 0) { 631fa9e4066Sahrens ZFS_EXIT(zfsvfs); 632fa9e4066Sahrens return (EINVAL); 633fa9e4066Sahrens } 634fa9e4066Sahrens 635fa9e4066Sahrens /* 636104e2ed7Sperrin * If we need to grow the block size then zfs_range_lock() 637104e2ed7Sperrin * will lock a wider range than we request here. 638104e2ed7Sperrin * Later after growing the block size we reduce the range. 639fa9e4066Sahrens */ 640104e2ed7Sperrin rl = zfs_range_lock(zp, woff, n, RL_WRITER); 641fa9e4066Sahrens } 642fa9e4066Sahrens 643fa9e4066Sahrens if (woff >= limit) { 644feb08c6bSbillm zfs_range_unlock(rl); 645feb08c6bSbillm ZFS_EXIT(zfsvfs); 646feb08c6bSbillm return (EFBIG); 647fa9e4066Sahrens } 648fa9e4066Sahrens 649fa9e4066Sahrens if ((woff + n) > limit || woff > (limit - n)) 650fa9e4066Sahrens n = limit - woff; 651fa9e4066Sahrens 652fa9e4066Sahrens /* 653104e2ed7Sperrin * Check for mandatory locks 654fa9e4066Sahrens */ 655fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode) && 656feb08c6bSbillm (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 657feb08c6bSbillm zfs_range_unlock(rl); 658feb08c6bSbillm ZFS_EXIT(zfsvfs); 659feb08c6bSbillm return (error); 660fa9e4066Sahrens } 661feb08c6bSbillm end_size = MAX(zp->z_phys->zp_size, woff + n); 662fa9e4066Sahrens 663104e2ed7Sperrin /* 664feb08c6bSbillm * Write the file in reasonable size chunks. Each chunk is written 665feb08c6bSbillm * in a separate transaction; this keeps the intent log records small 666feb08c6bSbillm * and allows us to do more fine-grained space accounting. 667104e2ed7Sperrin */ 668feb08c6bSbillm while (n > 0) { 6692fdbea25SAleksandr Guzovskiy abuf = NULL; 6702fdbea25SAleksandr Guzovskiy woff = uio->uio_loffset; 6712fdbea25SAleksandr Guzovskiy 6722fdbea25SAleksandr Guzovskiy again: 67314843421SMatthew Ahrens if (zfs_usergroup_overquota(zfsvfs, 67414843421SMatthew Ahrens B_FALSE, zp->z_phys->zp_uid) || 67514843421SMatthew Ahrens zfs_usergroup_overquota(zfsvfs, 67614843421SMatthew Ahrens B_TRUE, zp->z_phys->zp_gid)) { 6772fdbea25SAleksandr Guzovskiy if (abuf != NULL) 6782fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(abuf); 67914843421SMatthew Ahrens error = EDQUOT; 68014843421SMatthew Ahrens break; 68114843421SMatthew Ahrens } 6822fdbea25SAleksandr Guzovskiy 6832fdbea25SAleksandr Guzovskiy /* 6842fdbea25SAleksandr Guzovskiy * If dmu_assign_arcbuf() is expected to execute with minimum 6852fdbea25SAleksandr Guzovskiy * overhead loan an arc buffer and copy user data to it before 6862fdbea25SAleksandr Guzovskiy * we enter a txg. This avoids holding a txg forever while we 6872fdbea25SAleksandr Guzovskiy * pagefault on a hanging NFS server mapping. 6882fdbea25SAleksandr Guzovskiy */ 6892fdbea25SAleksandr Guzovskiy if (abuf == NULL && n >= max_blksz && 6902fdbea25SAleksandr Guzovskiy woff >= zp->z_phys->zp_size && 6912fdbea25SAleksandr Guzovskiy P2PHASE(woff, max_blksz) == 0 && 6922fdbea25SAleksandr Guzovskiy zp->z_blksz == max_blksz) { 6932fdbea25SAleksandr Guzovskiy size_t cbytes; 6942fdbea25SAleksandr Guzovskiy 6952fdbea25SAleksandr Guzovskiy abuf = dmu_request_arcbuf(zp->z_dbuf, max_blksz); 6962fdbea25SAleksandr Guzovskiy ASSERT(abuf != NULL); 6972fdbea25SAleksandr Guzovskiy ASSERT(arc_buf_size(abuf) == max_blksz); 6982fdbea25SAleksandr Guzovskiy if (error = uiocopy(abuf->b_data, max_blksz, 6992fdbea25SAleksandr Guzovskiy UIO_WRITE, uio, &cbytes)) { 7002fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(abuf); 7012fdbea25SAleksandr Guzovskiy break; 7022fdbea25SAleksandr Guzovskiy } 7032fdbea25SAleksandr Guzovskiy ASSERT(cbytes == max_blksz); 7042fdbea25SAleksandr Guzovskiy } 7052fdbea25SAleksandr Guzovskiy 7062fdbea25SAleksandr Guzovskiy /* 7072fdbea25SAleksandr Guzovskiy * Start a transaction. 7082fdbea25SAleksandr Guzovskiy */ 709feb08c6bSbillm tx = dmu_tx_create(zfsvfs->z_os); 710feb08c6bSbillm dmu_tx_hold_bonus(tx, zp->z_id); 711feb08c6bSbillm dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 7121209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 713feb08c6bSbillm if (error) { 7141209a471SNeil Perrin if (error == ERESTART) { 715feb08c6bSbillm dmu_tx_wait(tx); 716feb08c6bSbillm dmu_tx_abort(tx); 7172fdbea25SAleksandr Guzovskiy goto again; 718feb08c6bSbillm } 719feb08c6bSbillm dmu_tx_abort(tx); 7202fdbea25SAleksandr Guzovskiy if (abuf != NULL) 7212fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(abuf); 722feb08c6bSbillm break; 723feb08c6bSbillm } 724104e2ed7Sperrin 725feb08c6bSbillm /* 726feb08c6bSbillm * If zfs_range_lock() over-locked we grow the blocksize 727feb08c6bSbillm * and then reduce the lock range. This will only happen 728feb08c6bSbillm * on the first iteration since zfs_range_reduce() will 729feb08c6bSbillm * shrink down r_len to the appropriate size. 730feb08c6bSbillm */ 731feb08c6bSbillm if (rl->r_len == UINT64_MAX) { 732feb08c6bSbillm uint64_t new_blksz; 733feb08c6bSbillm 734feb08c6bSbillm if (zp->z_blksz > max_blksz) { 735feb08c6bSbillm ASSERT(!ISP2(zp->z_blksz)); 736feb08c6bSbillm new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 737feb08c6bSbillm } else { 738feb08c6bSbillm new_blksz = MIN(end_size, max_blksz); 739feb08c6bSbillm } 740feb08c6bSbillm zfs_grow_blocksize(zp, new_blksz, tx); 741feb08c6bSbillm zfs_range_reduce(rl, woff, n); 742fa9e4066Sahrens } 743fa9e4066Sahrens 744fa9e4066Sahrens /* 745fa9e4066Sahrens * XXX - should we really limit each write to z_max_blksz? 746fa9e4066Sahrens * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 747fa9e4066Sahrens */ 748fa9e4066Sahrens nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 749fa9e4066Sahrens 7502fdbea25SAleksandr Guzovskiy if (abuf == NULL) { 7512fdbea25SAleksandr Guzovskiy tx_bytes = uio->uio_resid; 7522fdbea25SAleksandr Guzovskiy error = dmu_write_uio(zfsvfs->z_os, zp->z_id, uio, 7532fdbea25SAleksandr Guzovskiy nbytes, tx); 7542fdbea25SAleksandr Guzovskiy tx_bytes -= uio->uio_resid; 7552fdbea25SAleksandr Guzovskiy } else { 7562fdbea25SAleksandr Guzovskiy tx_bytes = nbytes; 7572fdbea25SAleksandr Guzovskiy ASSERT(tx_bytes == max_blksz); 7582fdbea25SAleksandr Guzovskiy dmu_assign_arcbuf(zp->z_dbuf, woff, abuf, tx); 7592fdbea25SAleksandr Guzovskiy ASSERT(tx_bytes <= uio->uio_resid); 7602fdbea25SAleksandr Guzovskiy uioskip(uio, tx_bytes); 7612fdbea25SAleksandr Guzovskiy } 7622fdbea25SAleksandr Guzovskiy if (tx_bytes && vn_has_cached_data(vp)) { 763ac05c741SMark Maybee update_pages(vp, woff, 764ac05c741SMark Maybee tx_bytes, zfsvfs->z_os, zp->z_id); 7652fdbea25SAleksandr Guzovskiy } 766fa9e4066Sahrens 767feb08c6bSbillm /* 768feb08c6bSbillm * If we made no progress, we're done. If we made even 769feb08c6bSbillm * partial progress, update the znode and ZIL accordingly. 770feb08c6bSbillm */ 771feb08c6bSbillm if (tx_bytes == 0) { 772af2c4821Smaybee dmu_tx_commit(tx); 773feb08c6bSbillm ASSERT(error != 0); 774fa9e4066Sahrens break; 775fa9e4066Sahrens } 776fa9e4066Sahrens 777169cdae2Smarks /* 778169cdae2Smarks * Clear Set-UID/Set-GID bits on successful write if not 779169cdae2Smarks * privileged and at least one of the excute bits is set. 780169cdae2Smarks * 781169cdae2Smarks * It would be nice to to this after all writes have 782169cdae2Smarks * been done, but that would still expose the ISUID/ISGID 783169cdae2Smarks * to another app after the partial write is committed. 784da6c28aaSamw * 785da6c28aaSamw * Note: we don't call zfs_fuid_map_id() here because 786da6c28aaSamw * user 0 is not an ephemeral uid. 787169cdae2Smarks */ 788169cdae2Smarks mutex_enter(&zp->z_acl_lock); 789169cdae2Smarks if ((zp->z_phys->zp_mode & (S_IXUSR | (S_IXUSR >> 3) | 790169cdae2Smarks (S_IXUSR >> 6))) != 0 && 791169cdae2Smarks (zp->z_phys->zp_mode & (S_ISUID | S_ISGID)) != 0 && 792169cdae2Smarks secpolicy_vnode_setid_retain(cr, 793169cdae2Smarks (zp->z_phys->zp_mode & S_ISUID) != 0 && 794169cdae2Smarks zp->z_phys->zp_uid == 0) != 0) { 795ecb72030Sperrin zp->z_phys->zp_mode &= ~(S_ISUID | S_ISGID); 796169cdae2Smarks } 797169cdae2Smarks mutex_exit(&zp->z_acl_lock); 798169cdae2Smarks 799fa9e4066Sahrens /* 800feb08c6bSbillm * Update time stamp. NOTE: This marks the bonus buffer as 801feb08c6bSbillm * dirty, so we don't have to do it again for zp_size. 802fa9e4066Sahrens */ 803fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 804fa9e4066Sahrens 805fa9e4066Sahrens /* 806feb08c6bSbillm * Update the file size (zp_size) if it has changed; 807feb08c6bSbillm * account for possible concurrent updates. 808fa9e4066Sahrens */ 809feb08c6bSbillm while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) 810fa9e4066Sahrens (void) atomic_cas_64(&zp->z_phys->zp_size, end_size, 811fa9e4066Sahrens uio->uio_loffset); 812feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 813feb08c6bSbillm dmu_tx_commit(tx); 814fa9e4066Sahrens 815feb08c6bSbillm if (error != 0) 816feb08c6bSbillm break; 817feb08c6bSbillm ASSERT(tx_bytes == nbytes); 818feb08c6bSbillm n -= nbytes; 819feb08c6bSbillm } 820fa9e4066Sahrens 821c5c6ffa0Smaybee zfs_range_unlock(rl); 822fa9e4066Sahrens 823fa9e4066Sahrens /* 824fa9e4066Sahrens * If we're in replay mode, or we made no progress, return error. 825fa9e4066Sahrens * Otherwise, it's at least a partial write, so it's successful. 826fa9e4066Sahrens */ 8271209a471SNeil Perrin if (zfsvfs->z_replay || uio->uio_resid == start_resid) { 828fa9e4066Sahrens ZFS_EXIT(zfsvfs); 829fa9e4066Sahrens return (error); 830fa9e4066Sahrens } 831fa9e4066Sahrens 832b19a79ecSperrin if (ioflag & (FSYNC | FDSYNC)) 833b19a79ecSperrin zil_commit(zilog, zp->z_last_itx, zp->z_id); 834fa9e4066Sahrens 835fa9e4066Sahrens ZFS_EXIT(zfsvfs); 836fa9e4066Sahrens return (0); 837fa9e4066Sahrens } 838fa9e4066Sahrens 839c5c6ffa0Smaybee void 84067bd71c6Sperrin zfs_get_done(dmu_buf_t *db, void *vzgd) 841c5c6ffa0Smaybee { 84267bd71c6Sperrin zgd_t *zgd = (zgd_t *)vzgd; 84367bd71c6Sperrin rl_t *rl = zgd->zgd_rl; 844c5c6ffa0Smaybee vnode_t *vp = ZTOV(rl->r_zp); 8459d3574bfSNeil Perrin objset_t *os = rl->r_zp->z_zfsvfs->z_os; 846c5c6ffa0Smaybee 84767bd71c6Sperrin dmu_buf_rele(db, vzgd); 848c5c6ffa0Smaybee zfs_range_unlock(rl); 8499d3574bfSNeil Perrin /* 8509d3574bfSNeil Perrin * Release the vnode asynchronously as we currently have the 8519d3574bfSNeil Perrin * txg stopped from syncing. 8529d3574bfSNeil Perrin */ 8539d3574bfSNeil Perrin VN_RELE_ASYNC(vp, dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 85417f17c2dSbonwick zil_add_block(zgd->zgd_zilog, zgd->zgd_bp); 85567bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 856c5c6ffa0Smaybee } 857c5c6ffa0Smaybee 858fa9e4066Sahrens /* 859fa9e4066Sahrens * Get data to generate a TX_WRITE intent log record. 860fa9e4066Sahrens */ 861fa9e4066Sahrens int 862c5c6ffa0Smaybee zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) 863fa9e4066Sahrens { 864fa9e4066Sahrens zfsvfs_t *zfsvfs = arg; 865fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 866fa9e4066Sahrens znode_t *zp; 867fa9e4066Sahrens uint64_t off = lr->lr_offset; 868c5c6ffa0Smaybee dmu_buf_t *db; 869104e2ed7Sperrin rl_t *rl; 87067bd71c6Sperrin zgd_t *zgd; 871feb08c6bSbillm int dlen = lr->lr_length; /* length of user data */ 872fa9e4066Sahrens int error = 0; 873fa9e4066Sahrens 87467bd71c6Sperrin ASSERT(zio); 875fa9e4066Sahrens ASSERT(dlen != 0); 876fa9e4066Sahrens 877fa9e4066Sahrens /* 878104e2ed7Sperrin * Nothing to do if the file has been removed 879fa9e4066Sahrens */ 880fa9e4066Sahrens if (zfs_zget(zfsvfs, lr->lr_foid, &zp) != 0) 881fa9e4066Sahrens return (ENOENT); 882893a6d32Sahrens if (zp->z_unlinked) { 8839d3574bfSNeil Perrin /* 8849d3574bfSNeil Perrin * Release the vnode asynchronously as we currently have the 8859d3574bfSNeil Perrin * txg stopped from syncing. 8869d3574bfSNeil Perrin */ 8879d3574bfSNeil Perrin VN_RELE_ASYNC(ZTOV(zp), 8889d3574bfSNeil Perrin dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 889fa9e4066Sahrens return (ENOENT); 890fa9e4066Sahrens } 891fa9e4066Sahrens 892fa9e4066Sahrens /* 893fa9e4066Sahrens * Write records come in two flavors: immediate and indirect. 894fa9e4066Sahrens * For small writes it's cheaper to store the data with the 895fa9e4066Sahrens * log record (immediate); for large writes it's cheaper to 896fa9e4066Sahrens * sync the data and get a pointer to it (indirect) so that 897fa9e4066Sahrens * we don't have to write the data twice. 898fa9e4066Sahrens */ 899104e2ed7Sperrin if (buf != NULL) { /* immediate write */ 900104e2ed7Sperrin rl = zfs_range_lock(zp, off, dlen, RL_READER); 901104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 902104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 903104e2ed7Sperrin error = ENOENT; 904104e2ed7Sperrin goto out; 905104e2ed7Sperrin } 906*7bfdf011SNeil Perrin VERIFY(0 == dmu_read(os, lr->lr_foid, off, dlen, buf, 907*7bfdf011SNeil Perrin DMU_READ_NO_PREFETCH)); 908104e2ed7Sperrin } else { /* indirect write */ 909104e2ed7Sperrin uint64_t boff; /* block starting offset */ 910104e2ed7Sperrin 911fa9e4066Sahrens /* 912104e2ed7Sperrin * Have to lock the whole block to ensure when it's 913104e2ed7Sperrin * written out and it's checksum is being calculated 914104e2ed7Sperrin * that no one can change the data. We need to re-check 915104e2ed7Sperrin * blocksize after we get the lock in case it's changed! 916fa9e4066Sahrens */ 917104e2ed7Sperrin for (;;) { 9185263255cSperrin if (ISP2(zp->z_blksz)) { 9195263255cSperrin boff = P2ALIGN_TYPED(off, zp->z_blksz, 9205263255cSperrin uint64_t); 9215263255cSperrin } else { 9225263255cSperrin boff = 0; 9235263255cSperrin } 924104e2ed7Sperrin dlen = zp->z_blksz; 925104e2ed7Sperrin rl = zfs_range_lock(zp, boff, dlen, RL_READER); 926104e2ed7Sperrin if (zp->z_blksz == dlen) 927104e2ed7Sperrin break; 928c5c6ffa0Smaybee zfs_range_unlock(rl); 929104e2ed7Sperrin } 930104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 931104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 932104e2ed7Sperrin error = ENOENT; 933104e2ed7Sperrin goto out; 934104e2ed7Sperrin } 93567bd71c6Sperrin zgd = (zgd_t *)kmem_alloc(sizeof (zgd_t), KM_SLEEP); 93667bd71c6Sperrin zgd->zgd_rl = rl; 93767bd71c6Sperrin zgd->zgd_zilog = zfsvfs->z_log; 93867bd71c6Sperrin zgd->zgd_bp = &lr->lr_blkptr; 93967bd71c6Sperrin VERIFY(0 == dmu_buf_hold(os, lr->lr_foid, boff, zgd, &db)); 940c5c6ffa0Smaybee ASSERT(boff == db->db_offset); 941c5c6ffa0Smaybee lr->lr_blkoff = off - boff; 942c5c6ffa0Smaybee error = dmu_sync(zio, db, &lr->lr_blkptr, 94367bd71c6Sperrin lr->lr_common.lrc_txg, zfs_get_done, zgd); 944f4d2e9e6Smaybee ASSERT((error && error != EINPROGRESS) || 945f4d2e9e6Smaybee lr->lr_length <= zp->z_blksz); 94617f17c2dSbonwick if (error == 0) 94717f17c2dSbonwick zil_add_block(zfsvfs->z_log, &lr->lr_blkptr); 948c5c6ffa0Smaybee /* 949c5c6ffa0Smaybee * If we get EINPROGRESS, then we need to wait for a 950c5c6ffa0Smaybee * write IO initiated by dmu_sync() to complete before 951b19a79ecSperrin * we can release this dbuf. We will finish everything 952c5c6ffa0Smaybee * up in the zfs_get_done() callback. 953c5c6ffa0Smaybee */ 954c5c6ffa0Smaybee if (error == EINPROGRESS) 955c5c6ffa0Smaybee return (0); 95667bd71c6Sperrin dmu_buf_rele(db, zgd); 95767bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 958fa9e4066Sahrens } 959104e2ed7Sperrin out: 960c5c6ffa0Smaybee zfs_range_unlock(rl); 9619d3574bfSNeil Perrin /* 9629d3574bfSNeil Perrin * Release the vnode asynchronously as we currently have the 9639d3574bfSNeil Perrin * txg stopped from syncing. 9649d3574bfSNeil Perrin */ 9659d3574bfSNeil Perrin VN_RELE_ASYNC(ZTOV(zp), dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 966fa9e4066Sahrens return (error); 967fa9e4066Sahrens } 968fa9e4066Sahrens 969fa9e4066Sahrens /*ARGSUSED*/ 970fa9e4066Sahrens static int 971da6c28aaSamw zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr, 972da6c28aaSamw caller_context_t *ct) 973fa9e4066Sahrens { 974fa9e4066Sahrens znode_t *zp = VTOZ(vp); 975fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 976fa9e4066Sahrens int error; 977fa9e4066Sahrens 9783cb34c60Sahrens ZFS_ENTER(zfsvfs); 9793cb34c60Sahrens ZFS_VERIFY_ZP(zp); 980da6c28aaSamw 981da6c28aaSamw if (flag & V_ACE_MASK) 982da6c28aaSamw error = zfs_zaccess(zp, mode, flag, B_FALSE, cr); 983da6c28aaSamw else 984da6c28aaSamw error = zfs_zaccess_rwx(zp, mode, flag, cr); 985da6c28aaSamw 986fa9e4066Sahrens ZFS_EXIT(zfsvfs); 987fa9e4066Sahrens return (error); 988fa9e4066Sahrens } 989fa9e4066Sahrens 990fa9e4066Sahrens /* 991fa9e4066Sahrens * Lookup an entry in a directory, or an extended attribute directory. 992fa9e4066Sahrens * If it exists, return a held vnode reference for it. 993fa9e4066Sahrens * 994fa9e4066Sahrens * IN: dvp - vnode of directory to search. 995fa9e4066Sahrens * nm - name of entry to lookup. 996fa9e4066Sahrens * pnp - full pathname to lookup [UNUSED]. 997fa9e4066Sahrens * flags - LOOKUP_XATTR set if looking for an attribute. 998fa9e4066Sahrens * rdir - root directory vnode [UNUSED]. 999fa9e4066Sahrens * cr - credentials of caller. 1000da6c28aaSamw * ct - caller context 1001da6c28aaSamw * direntflags - directory lookup flags 1002da6c28aaSamw * realpnp - returned pathname. 1003fa9e4066Sahrens * 1004fa9e4066Sahrens * OUT: vpp - vnode of located entry, NULL if not found. 1005fa9e4066Sahrens * 1006fa9e4066Sahrens * RETURN: 0 if success 1007fa9e4066Sahrens * error code if failure 1008fa9e4066Sahrens * 1009fa9e4066Sahrens * Timestamps: 1010fa9e4066Sahrens * NA 1011fa9e4066Sahrens */ 1012fa9e4066Sahrens /* ARGSUSED */ 1013fa9e4066Sahrens static int 1014fa9e4066Sahrens zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 1015da6c28aaSamw int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, 1016da6c28aaSamw int *direntflags, pathname_t *realpnp) 1017fa9e4066Sahrens { 1018fa9e4066Sahrens znode_t *zdp = VTOZ(dvp); 1019fa9e4066Sahrens zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 1020fa9e4066Sahrens int error; 1021fa9e4066Sahrens 10223cb34c60Sahrens ZFS_ENTER(zfsvfs); 10233cb34c60Sahrens ZFS_VERIFY_ZP(zdp); 1024fa9e4066Sahrens 1025fa9e4066Sahrens *vpp = NULL; 1026fa9e4066Sahrens 1027fa9e4066Sahrens if (flags & LOOKUP_XATTR) { 10287b55fa8eSck /* 10297b55fa8eSck * If the xattr property is off, refuse the lookup request. 10307b55fa8eSck */ 10317b55fa8eSck if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 10327b55fa8eSck ZFS_EXIT(zfsvfs); 10337b55fa8eSck return (EINVAL); 10347b55fa8eSck } 10357b55fa8eSck 1036fa9e4066Sahrens /* 1037fa9e4066Sahrens * We don't allow recursive attributes.. 1038fa9e4066Sahrens * Maybe someday we will. 1039fa9e4066Sahrens */ 1040fa9e4066Sahrens if (zdp->z_phys->zp_flags & ZFS_XATTR) { 1041fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1042fa9e4066Sahrens return (EINVAL); 1043fa9e4066Sahrens } 1044fa9e4066Sahrens 10453f063a9dSck if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 1046fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1047fa9e4066Sahrens return (error); 1048fa9e4066Sahrens } 1049fa9e4066Sahrens 1050fa9e4066Sahrens /* 1051fa9e4066Sahrens * Do we have permission to get into attribute directory? 1052fa9e4066Sahrens */ 1053fa9e4066Sahrens 1054da6c28aaSamw if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0, 1055da6c28aaSamw B_FALSE, cr)) { 1056fa9e4066Sahrens VN_RELE(*vpp); 1057da6c28aaSamw *vpp = NULL; 1058fa9e4066Sahrens } 1059fa9e4066Sahrens 1060fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1061fa9e4066Sahrens return (error); 1062fa9e4066Sahrens } 1063fa9e4066Sahrens 10640f2dc02eSek if (dvp->v_type != VDIR) { 10650f2dc02eSek ZFS_EXIT(zfsvfs); 1066736b9155Smarks return (ENOTDIR); 10670f2dc02eSek } 1068736b9155Smarks 1069fa9e4066Sahrens /* 1070fa9e4066Sahrens * Check accessibility of directory. 1071fa9e4066Sahrens */ 1072fa9e4066Sahrens 1073da6c28aaSamw if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) { 1074fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1075fa9e4066Sahrens return (error); 1076fa9e4066Sahrens } 1077fa9e4066Sahrens 1078de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), 1079da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1080da6c28aaSamw ZFS_EXIT(zfsvfs); 1081da6c28aaSamw return (EILSEQ); 1082da6c28aaSamw } 1083fa9e4066Sahrens 1084da6c28aaSamw error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp); 1085da6c28aaSamw if (error == 0) { 1086fa9e4066Sahrens /* 1087fa9e4066Sahrens * Convert device special files 1088fa9e4066Sahrens */ 1089fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1090fa9e4066Sahrens vnode_t *svp; 1091fa9e4066Sahrens 1092fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1093fa9e4066Sahrens VN_RELE(*vpp); 1094fa9e4066Sahrens if (svp == NULL) 1095fa9e4066Sahrens error = ENOSYS; 1096fa9e4066Sahrens else 1097fa9e4066Sahrens *vpp = svp; 1098fa9e4066Sahrens } 1099fa9e4066Sahrens } 1100fa9e4066Sahrens 1101fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1102fa9e4066Sahrens return (error); 1103fa9e4066Sahrens } 1104fa9e4066Sahrens 1105fa9e4066Sahrens /* 1106fa9e4066Sahrens * Attempt to create a new entry in a directory. If the entry 1107fa9e4066Sahrens * already exists, truncate the file if permissible, else return 1108fa9e4066Sahrens * an error. Return the vp of the created or trunc'd file. 1109fa9e4066Sahrens * 1110fa9e4066Sahrens * IN: dvp - vnode of directory to put new file entry in. 1111fa9e4066Sahrens * name - name of new file entry. 1112fa9e4066Sahrens * vap - attributes of new file. 1113fa9e4066Sahrens * excl - flag indicating exclusive or non-exclusive mode. 1114fa9e4066Sahrens * mode - mode to open file with. 1115fa9e4066Sahrens * cr - credentials of caller. 1116fa9e4066Sahrens * flag - large file flag [UNUSED]. 1117da6c28aaSamw * ct - caller context 1118da6c28aaSamw * vsecp - ACL to be set 1119fa9e4066Sahrens * 1120fa9e4066Sahrens * OUT: vpp - vnode of created or trunc'd entry. 1121fa9e4066Sahrens * 1122fa9e4066Sahrens * RETURN: 0 if success 1123fa9e4066Sahrens * error code if failure 1124fa9e4066Sahrens * 1125fa9e4066Sahrens * Timestamps: 1126fa9e4066Sahrens * dvp - ctime|mtime updated if new entry created 1127fa9e4066Sahrens * vp - ctime|mtime always, atime if new 1128fa9e4066Sahrens */ 1129da6c28aaSamw 1130fa9e4066Sahrens /* ARGSUSED */ 1131fa9e4066Sahrens static int 1132fa9e4066Sahrens zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, 1133da6c28aaSamw int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct, 1134da6c28aaSamw vsecattr_t *vsecp) 1135fa9e4066Sahrens { 1136fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1137fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1138f18faf3fSek zilog_t *zilog; 1139f18faf3fSek objset_t *os; 1140fa9e4066Sahrens zfs_dirlock_t *dl; 1141fa9e4066Sahrens dmu_tx_t *tx; 1142fa9e4066Sahrens int error; 1143c1ce5987SMark Shellenbaum ksid_t *ksid; 1144c1ce5987SMark Shellenbaum uid_t uid; 1145c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 114689459e17SMark Shellenbaum zfs_acl_ids_t acl_ids; 114789459e17SMark Shellenbaum boolean_t fuid_dirtied; 1148da6c28aaSamw 1149da6c28aaSamw /* 1150da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1151da6c28aaSamw * make sure file system is at proper version 1152da6c28aaSamw */ 1153da6c28aaSamw 1154c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 1155c1ce5987SMark Shellenbaum if (ksid) 1156c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 1157c1ce5987SMark Shellenbaum else 1158c1ce5987SMark Shellenbaum uid = crgetuid(cr); 1159c1ce5987SMark Shellenbaum 1160da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1161da6c28aaSamw (vsecp || (vap->va_mask & AT_XVATTR) || 1162c1ce5987SMark Shellenbaum IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1163da6c28aaSamw return (EINVAL); 1164fa9e4066Sahrens 11653cb34c60Sahrens ZFS_ENTER(zfsvfs); 11663cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1167f18faf3fSek os = zfsvfs->z_os; 1168f18faf3fSek zilog = zfsvfs->z_log; 1169fa9e4066Sahrens 1170de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 1171da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1172da6c28aaSamw ZFS_EXIT(zfsvfs); 1173da6c28aaSamw return (EILSEQ); 1174da6c28aaSamw } 1175da6c28aaSamw 1176da6c28aaSamw if (vap->va_mask & AT_XVATTR) { 1177da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1178da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1179da6c28aaSamw ZFS_EXIT(zfsvfs); 1180da6c28aaSamw return (error); 1181da6c28aaSamw } 1182da6c28aaSamw } 1183fa9e4066Sahrens top: 1184fa9e4066Sahrens *vpp = NULL; 1185fa9e4066Sahrens 1186fa9e4066Sahrens if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) 1187fa9e4066Sahrens vap->va_mode &= ~VSVTX; 1188fa9e4066Sahrens 1189fa9e4066Sahrens if (*name == '\0') { 1190fa9e4066Sahrens /* 1191fa9e4066Sahrens * Null component name refers to the directory itself. 1192fa9e4066Sahrens */ 1193fa9e4066Sahrens VN_HOLD(dvp); 1194fa9e4066Sahrens zp = dzp; 1195fa9e4066Sahrens dl = NULL; 1196fa9e4066Sahrens error = 0; 1197fa9e4066Sahrens } else { 1198fa9e4066Sahrens /* possible VN_HOLD(zp) */ 1199da6c28aaSamw int zflg = 0; 1200da6c28aaSamw 1201da6c28aaSamw if (flag & FIGNORECASE) 1202da6c28aaSamw zflg |= ZCILOOK; 1203da6c28aaSamw 1204da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1205da6c28aaSamw NULL, NULL); 1206da6c28aaSamw if (error) { 1207fa9e4066Sahrens if (strcmp(name, "..") == 0) 1208fa9e4066Sahrens error = EISDIR; 1209fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1210fa9e4066Sahrens return (error); 1211fa9e4066Sahrens } 1212fa9e4066Sahrens } 1213fa9e4066Sahrens if (zp == NULL) { 1214da6c28aaSamw uint64_t txtype; 1215da6c28aaSamw 1216fa9e4066Sahrens /* 1217fa9e4066Sahrens * Create a new file object and update the directory 1218fa9e4066Sahrens * to reference it. 1219fa9e4066Sahrens */ 1220da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 1221fa9e4066Sahrens goto out; 1222fa9e4066Sahrens } 1223fa9e4066Sahrens 1224fa9e4066Sahrens /* 1225fa9e4066Sahrens * We only support the creation of regular files in 1226fa9e4066Sahrens * extended attribute directories. 1227fa9e4066Sahrens */ 1228fa9e4066Sahrens if ((dzp->z_phys->zp_flags & ZFS_XATTR) && 1229fa9e4066Sahrens (vap->va_type != VREG)) { 1230fa9e4066Sahrens error = EINVAL; 1231fa9e4066Sahrens goto out; 1232fa9e4066Sahrens } 1233fa9e4066Sahrens 123489459e17SMark Shellenbaum if ((error = zfs_acl_ids_create(dzp, 0, vap, cr, vsecp, 123589459e17SMark Shellenbaum &acl_ids)) != 0) 123689459e17SMark Shellenbaum goto out; 123714843421SMatthew Ahrens if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 123814843421SMatthew Ahrens error = EDQUOT; 123914843421SMatthew Ahrens goto out; 124014843421SMatthew Ahrens } 124189459e17SMark Shellenbaum 1242fa9e4066Sahrens tx = dmu_tx_create(os); 1243fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 124489459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 124514843421SMatthew Ahrens if (fuid_dirtied) 124614843421SMatthew Ahrens zfs_fuid_txhold(zfsvfs, tx); 1247fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 1248ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 124989459e17SMark Shellenbaum if (acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 1250fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1251fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1252da6c28aaSamw } 12531209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1254fa9e4066Sahrens if (error) { 125589459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1256fa9e4066Sahrens zfs_dirent_unlock(dl); 12571209a471SNeil Perrin if (error == ERESTART) { 12588a2f1b91Sahrens dmu_tx_wait(tx); 12598a2f1b91Sahrens dmu_tx_abort(tx); 1260fa9e4066Sahrens goto top; 1261fa9e4066Sahrens } 12628a2f1b91Sahrens dmu_tx_abort(tx); 1263fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1264fa9e4066Sahrens return (error); 1265fa9e4066Sahrens } 126689459e17SMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, &acl_ids); 126789459e17SMark Shellenbaum 126889459e17SMark Shellenbaum if (fuid_dirtied) 126989459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 127089459e17SMark Shellenbaum 1271fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 127289459e17SMark Shellenbaum 1273da6c28aaSamw txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); 1274da6c28aaSamw if (flag & FIGNORECASE) 1275da6c28aaSamw txtype |= TX_CI; 1276da6c28aaSamw zfs_log_create(zilog, tx, txtype, dzp, zp, name, 127789459e17SMark Shellenbaum vsecp, acl_ids.z_fuidp, vap); 127889459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1279fa9e4066Sahrens dmu_tx_commit(tx); 1280fa9e4066Sahrens } else { 1281da6c28aaSamw int aflags = (flag & FAPPEND) ? V_APPEND : 0; 1282da6c28aaSamw 1283fa9e4066Sahrens /* 1284fa9e4066Sahrens * A directory entry already exists for this name. 1285fa9e4066Sahrens */ 1286fa9e4066Sahrens /* 1287fa9e4066Sahrens * Can't truncate an existing file if in exclusive mode. 1288fa9e4066Sahrens */ 1289fa9e4066Sahrens if (excl == EXCL) { 1290fa9e4066Sahrens error = EEXIST; 1291fa9e4066Sahrens goto out; 1292fa9e4066Sahrens } 1293fa9e4066Sahrens /* 1294fa9e4066Sahrens * Can't open a directory for writing. 1295fa9e4066Sahrens */ 1296fa9e4066Sahrens if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1297fa9e4066Sahrens error = EISDIR; 1298fa9e4066Sahrens goto out; 1299fa9e4066Sahrens } 1300fa9e4066Sahrens /* 1301fa9e4066Sahrens * Verify requested access to file. 1302fa9e4066Sahrens */ 1303da6c28aaSamw if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) { 1304fa9e4066Sahrens goto out; 1305fa9e4066Sahrens } 1306fa9e4066Sahrens 1307fa9e4066Sahrens mutex_enter(&dzp->z_lock); 1308fa9e4066Sahrens dzp->z_seq++; 1309fa9e4066Sahrens mutex_exit(&dzp->z_lock); 1310fa9e4066Sahrens 13115730cc9aSmaybee /* 13125730cc9aSmaybee * Truncate regular files if requested. 13135730cc9aSmaybee */ 13145730cc9aSmaybee if ((ZTOV(zp)->v_type == VREG) && 1315fa9e4066Sahrens (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 1316cdb0ab79Smaybee /* we can't hold any locks when calling zfs_freesp() */ 1317cdb0ab79Smaybee zfs_dirent_unlock(dl); 1318cdb0ab79Smaybee dl = NULL; 13195730cc9aSmaybee error = zfs_freesp(zp, 0, 0, mode, TRUE); 1320df2381bfSpraks if (error == 0) { 1321da6c28aaSamw vnevent_create(ZTOV(zp), ct); 1322df2381bfSpraks } 1323fa9e4066Sahrens } 1324fa9e4066Sahrens } 1325fa9e4066Sahrens out: 1326fa9e4066Sahrens 1327fa9e4066Sahrens if (dl) 1328fa9e4066Sahrens zfs_dirent_unlock(dl); 1329fa9e4066Sahrens 1330fa9e4066Sahrens if (error) { 1331fa9e4066Sahrens if (zp) 1332fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1333fa9e4066Sahrens } else { 1334fa9e4066Sahrens *vpp = ZTOV(zp); 1335fa9e4066Sahrens /* 1336fa9e4066Sahrens * If vnode is for a device return a specfs vnode instead. 1337fa9e4066Sahrens */ 1338fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1339fa9e4066Sahrens struct vnode *svp; 1340fa9e4066Sahrens 1341fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1342fa9e4066Sahrens VN_RELE(*vpp); 1343fa9e4066Sahrens if (svp == NULL) { 1344fa9e4066Sahrens error = ENOSYS; 1345fa9e4066Sahrens } 1346fa9e4066Sahrens *vpp = svp; 1347fa9e4066Sahrens } 1348fa9e4066Sahrens } 1349fa9e4066Sahrens 1350fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1351fa9e4066Sahrens return (error); 1352fa9e4066Sahrens } 1353fa9e4066Sahrens 1354fa9e4066Sahrens /* 1355fa9e4066Sahrens * Remove an entry from a directory. 1356fa9e4066Sahrens * 1357fa9e4066Sahrens * IN: dvp - vnode of directory to remove entry from. 1358fa9e4066Sahrens * name - name of entry to remove. 1359fa9e4066Sahrens * cr - credentials of caller. 1360da6c28aaSamw * ct - caller context 1361da6c28aaSamw * flags - case flags 1362fa9e4066Sahrens * 1363fa9e4066Sahrens * RETURN: 0 if success 1364fa9e4066Sahrens * error code if failure 1365fa9e4066Sahrens * 1366fa9e4066Sahrens * Timestamps: 1367fa9e4066Sahrens * dvp - ctime|mtime 1368fa9e4066Sahrens * vp - ctime (if nlink > 0) 1369fa9e4066Sahrens */ 1370da6c28aaSamw /*ARGSUSED*/ 1371fa9e4066Sahrens static int 1372da6c28aaSamw zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct, 1373da6c28aaSamw int flags) 1374fa9e4066Sahrens { 1375fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1376fa9e4066Sahrens znode_t *xzp = NULL; 1377fa9e4066Sahrens vnode_t *vp; 1378fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1379f18faf3fSek zilog_t *zilog; 1380fa9e4066Sahrens uint64_t acl_obj, xattr_obj; 1381fa9e4066Sahrens zfs_dirlock_t *dl; 1382fa9e4066Sahrens dmu_tx_t *tx; 1383893a6d32Sahrens boolean_t may_delete_now, delete_now = FALSE; 1384cdb0ab79Smaybee boolean_t unlinked, toobig = FALSE; 1385da6c28aaSamw uint64_t txtype; 1386da6c28aaSamw pathname_t *realnmp = NULL; 1387da6c28aaSamw pathname_t realnm; 1388fa9e4066Sahrens int error; 1389da6c28aaSamw int zflg = ZEXISTS; 1390fa9e4066Sahrens 13913cb34c60Sahrens ZFS_ENTER(zfsvfs); 13923cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1393f18faf3fSek zilog = zfsvfs->z_log; 1394fa9e4066Sahrens 1395da6c28aaSamw if (flags & FIGNORECASE) { 1396da6c28aaSamw zflg |= ZCILOOK; 1397da6c28aaSamw pn_alloc(&realnm); 1398da6c28aaSamw realnmp = &realnm; 1399da6c28aaSamw } 1400da6c28aaSamw 1401fa9e4066Sahrens top: 1402fa9e4066Sahrens /* 1403fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1404fa9e4066Sahrens */ 1405da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1406da6c28aaSamw NULL, realnmp)) { 1407da6c28aaSamw if (realnmp) 1408da6c28aaSamw pn_free(realnmp); 1409fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1410fa9e4066Sahrens return (error); 1411fa9e4066Sahrens } 1412fa9e4066Sahrens 1413fa9e4066Sahrens vp = ZTOV(zp); 1414fa9e4066Sahrens 1415fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1416fa9e4066Sahrens goto out; 1417fa9e4066Sahrens } 1418fa9e4066Sahrens 1419fa9e4066Sahrens /* 1420fa9e4066Sahrens * Need to use rmdir for removing directories. 1421fa9e4066Sahrens */ 1422fa9e4066Sahrens if (vp->v_type == VDIR) { 1423fa9e4066Sahrens error = EPERM; 1424fa9e4066Sahrens goto out; 1425fa9e4066Sahrens } 1426fa9e4066Sahrens 1427da6c28aaSamw vnevent_remove(vp, dvp, name, ct); 1428fa9e4066Sahrens 1429da6c28aaSamw if (realnmp) 1430ab04eb8eStimh dnlc_remove(dvp, realnmp->pn_buf); 1431da6c28aaSamw else 1432da6c28aaSamw dnlc_remove(dvp, name); 1433033f9833Sek 1434fa9e4066Sahrens mutex_enter(&vp->v_lock); 1435fa9e4066Sahrens may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1436fa9e4066Sahrens mutex_exit(&vp->v_lock); 1437fa9e4066Sahrens 1438fa9e4066Sahrens /* 1439893a6d32Sahrens * We may delete the znode now, or we may put it in the unlinked set; 1440fa9e4066Sahrens * it depends on whether we're the last link, and on whether there are 1441fa9e4066Sahrens * other holds on the vnode. So we dmu_tx_hold() the right things to 1442fa9e4066Sahrens * allow for either case. 1443fa9e4066Sahrens */ 1444fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1445ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1446fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1447cdb0ab79Smaybee if (may_delete_now) { 1448cdb0ab79Smaybee toobig = 1449cdb0ab79Smaybee zp->z_phys->zp_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT; 1450cdb0ab79Smaybee /* if the file is too big, only hold_free a token amount */ 1451cdb0ab79Smaybee dmu_tx_hold_free(tx, zp->z_id, 0, 1452cdb0ab79Smaybee (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END)); 1453cdb0ab79Smaybee } 1454fa9e4066Sahrens 1455fa9e4066Sahrens /* are there any extended attributes? */ 1456fa9e4066Sahrens if ((xattr_obj = zp->z_phys->zp_xattr) != 0) { 1457fa9e4066Sahrens /* XXX - do we need this if we are deleting? */ 1458fa9e4066Sahrens dmu_tx_hold_bonus(tx, xattr_obj); 1459fa9e4066Sahrens } 1460fa9e4066Sahrens 1461fa9e4066Sahrens /* are there any additional acls */ 1462fa9e4066Sahrens if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 && 1463fa9e4066Sahrens may_delete_now) 1464fa9e4066Sahrens dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1465fa9e4066Sahrens 1466fa9e4066Sahrens /* charge as an update -- would be nice not to charge at all */ 1467893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1468fa9e4066Sahrens 14691209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1470fa9e4066Sahrens if (error) { 1471fa9e4066Sahrens zfs_dirent_unlock(dl); 1472fa9e4066Sahrens VN_RELE(vp); 14731209a471SNeil Perrin if (error == ERESTART) { 14748a2f1b91Sahrens dmu_tx_wait(tx); 14758a2f1b91Sahrens dmu_tx_abort(tx); 1476fa9e4066Sahrens goto top; 1477fa9e4066Sahrens } 1478da6c28aaSamw if (realnmp) 1479da6c28aaSamw pn_free(realnmp); 14808a2f1b91Sahrens dmu_tx_abort(tx); 1481fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1482fa9e4066Sahrens return (error); 1483fa9e4066Sahrens } 1484fa9e4066Sahrens 1485fa9e4066Sahrens /* 1486fa9e4066Sahrens * Remove the directory entry. 1487fa9e4066Sahrens */ 1488da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked); 1489fa9e4066Sahrens 1490fa9e4066Sahrens if (error) { 1491fa9e4066Sahrens dmu_tx_commit(tx); 1492fa9e4066Sahrens goto out; 1493fa9e4066Sahrens } 1494fa9e4066Sahrens 1495893a6d32Sahrens if (unlinked) { 1496fa9e4066Sahrens mutex_enter(&vp->v_lock); 1497cdb0ab79Smaybee delete_now = may_delete_now && !toobig && 1498fa9e4066Sahrens vp->v_count == 1 && !vn_has_cached_data(vp) && 1499fa9e4066Sahrens zp->z_phys->zp_xattr == xattr_obj && 1500fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj; 1501fa9e4066Sahrens mutex_exit(&vp->v_lock); 1502fa9e4066Sahrens } 1503fa9e4066Sahrens 1504fa9e4066Sahrens if (delete_now) { 1505fa9e4066Sahrens if (zp->z_phys->zp_xattr) { 1506fa9e4066Sahrens error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp); 1507fa9e4066Sahrens ASSERT3U(error, ==, 0); 1508fa9e4066Sahrens ASSERT3U(xzp->z_phys->zp_links, ==, 2); 1509fa9e4066Sahrens dmu_buf_will_dirty(xzp->z_dbuf, tx); 1510fa9e4066Sahrens mutex_enter(&xzp->z_lock); 1511893a6d32Sahrens xzp->z_unlinked = 1; 1512fa9e4066Sahrens xzp->z_phys->zp_links = 0; 1513fa9e4066Sahrens mutex_exit(&xzp->z_lock); 1514893a6d32Sahrens zfs_unlinked_add(xzp, tx); 1515fa9e4066Sahrens zp->z_phys->zp_xattr = 0; /* probably unnecessary */ 1516fa9e4066Sahrens } 1517fa9e4066Sahrens mutex_enter(&zp->z_lock); 1518fa9e4066Sahrens mutex_enter(&vp->v_lock); 1519fa9e4066Sahrens vp->v_count--; 1520fa9e4066Sahrens ASSERT3U(vp->v_count, ==, 0); 1521fa9e4066Sahrens mutex_exit(&vp->v_lock); 1522fa9e4066Sahrens mutex_exit(&zp->z_lock); 1523fa9e4066Sahrens zfs_znode_delete(zp, tx); 1524893a6d32Sahrens } else if (unlinked) { 1525893a6d32Sahrens zfs_unlinked_add(zp, tx); 1526fa9e4066Sahrens } 1527fa9e4066Sahrens 1528da6c28aaSamw txtype = TX_REMOVE; 1529da6c28aaSamw if (flags & FIGNORECASE) 1530da6c28aaSamw txtype |= TX_CI; 1531da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1532fa9e4066Sahrens 1533fa9e4066Sahrens dmu_tx_commit(tx); 1534fa9e4066Sahrens out: 1535da6c28aaSamw if (realnmp) 1536da6c28aaSamw pn_free(realnmp); 1537da6c28aaSamw 1538fa9e4066Sahrens zfs_dirent_unlock(dl); 1539fa9e4066Sahrens 1540fa9e4066Sahrens if (!delete_now) { 1541fa9e4066Sahrens VN_RELE(vp); 1542fa9e4066Sahrens } else if (xzp) { 1543cdb0ab79Smaybee /* this rele is delayed to prevent nesting transactions */ 1544fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 1545fa9e4066Sahrens } 1546fa9e4066Sahrens 1547fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1548fa9e4066Sahrens return (error); 1549fa9e4066Sahrens } 1550fa9e4066Sahrens 1551fa9e4066Sahrens /* 1552fa9e4066Sahrens * Create a new directory and insert it into dvp using the name 1553fa9e4066Sahrens * provided. Return a pointer to the inserted directory. 1554fa9e4066Sahrens * 1555fa9e4066Sahrens * IN: dvp - vnode of directory to add subdir to. 1556fa9e4066Sahrens * dirname - name of new directory. 1557fa9e4066Sahrens * vap - attributes of new directory. 1558fa9e4066Sahrens * cr - credentials of caller. 1559da6c28aaSamw * ct - caller context 1560da6c28aaSamw * vsecp - ACL to be set 1561fa9e4066Sahrens * 1562fa9e4066Sahrens * OUT: vpp - vnode of created directory. 1563fa9e4066Sahrens * 1564fa9e4066Sahrens * RETURN: 0 if success 1565fa9e4066Sahrens * error code if failure 1566fa9e4066Sahrens * 1567fa9e4066Sahrens * Timestamps: 1568fa9e4066Sahrens * dvp - ctime|mtime updated 1569fa9e4066Sahrens * vp - ctime|mtime|atime updated 1570fa9e4066Sahrens */ 1571da6c28aaSamw /*ARGSUSED*/ 1572fa9e4066Sahrens static int 1573da6c28aaSamw zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr, 1574da6c28aaSamw caller_context_t *ct, int flags, vsecattr_t *vsecp) 1575fa9e4066Sahrens { 1576fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1577fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1578f18faf3fSek zilog_t *zilog; 1579fa9e4066Sahrens zfs_dirlock_t *dl; 1580da6c28aaSamw uint64_t txtype; 1581fa9e4066Sahrens dmu_tx_t *tx; 1582fa9e4066Sahrens int error; 1583da6c28aaSamw int zf = ZNEW; 1584c1ce5987SMark Shellenbaum ksid_t *ksid; 1585c1ce5987SMark Shellenbaum uid_t uid; 1586c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 158789459e17SMark Shellenbaum zfs_acl_ids_t acl_ids; 158889459e17SMark Shellenbaum boolean_t fuid_dirtied; 1589fa9e4066Sahrens 1590fa9e4066Sahrens ASSERT(vap->va_type == VDIR); 1591fa9e4066Sahrens 1592da6c28aaSamw /* 1593da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1594da6c28aaSamw * make sure file system is at proper version 1595da6c28aaSamw */ 1596da6c28aaSamw 1597c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 1598c1ce5987SMark Shellenbaum if (ksid) 1599c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 1600c1ce5987SMark Shellenbaum else 1601c1ce5987SMark Shellenbaum uid = crgetuid(cr); 1602da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1603c1ce5987SMark Shellenbaum (vsecp || (vap->va_mask & AT_XVATTR) || 1604756962ecSMark Shellenbaum IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1605da6c28aaSamw return (EINVAL); 1606da6c28aaSamw 16073cb34c60Sahrens ZFS_ENTER(zfsvfs); 16083cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1609f18faf3fSek zilog = zfsvfs->z_log; 1610fa9e4066Sahrens 1611fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) { 1612fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1613fa9e4066Sahrens return (EINVAL); 1614fa9e4066Sahrens } 1615da6c28aaSamw 1616de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(dirname, 1617da6c28aaSamw strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1618da6c28aaSamw ZFS_EXIT(zfsvfs); 1619da6c28aaSamw return (EILSEQ); 1620da6c28aaSamw } 1621da6c28aaSamw if (flags & FIGNORECASE) 1622da6c28aaSamw zf |= ZCILOOK; 1623da6c28aaSamw 1624da6c28aaSamw if (vap->va_mask & AT_XVATTR) 1625da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1626da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1627da6c28aaSamw ZFS_EXIT(zfsvfs); 1628da6c28aaSamw return (error); 1629da6c28aaSamw } 1630fa9e4066Sahrens 1631fa9e4066Sahrens /* 1632fa9e4066Sahrens * First make sure the new directory doesn't exist. 1633fa9e4066Sahrens */ 1634da6c28aaSamw top: 1635da6c28aaSamw *vpp = NULL; 1636da6c28aaSamw 1637da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf, 1638da6c28aaSamw NULL, NULL)) { 1639fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1640fa9e4066Sahrens return (error); 1641fa9e4066Sahrens } 1642fa9e4066Sahrens 1643da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) { 1644d2443e76Smarks zfs_dirent_unlock(dl); 1645d2443e76Smarks ZFS_EXIT(zfsvfs); 1646d2443e76Smarks return (error); 1647d2443e76Smarks } 1648d2443e76Smarks 164989459e17SMark Shellenbaum if ((error = zfs_acl_ids_create(dzp, 0, vap, cr, vsecp, 165089459e17SMark Shellenbaum &acl_ids)) != 0) { 165189459e17SMark Shellenbaum zfs_dirent_unlock(dl); 165289459e17SMark Shellenbaum ZFS_EXIT(zfsvfs); 165389459e17SMark Shellenbaum return (error); 1654da6c28aaSamw } 165514843421SMatthew Ahrens if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 165614843421SMatthew Ahrens zfs_dirent_unlock(dl); 165714843421SMatthew Ahrens ZFS_EXIT(zfsvfs); 165814843421SMatthew Ahrens return (EDQUOT); 165914843421SMatthew Ahrens } 166089459e17SMark Shellenbaum 1661fa9e4066Sahrens /* 1662fa9e4066Sahrens * Add a new entry to the directory. 1663fa9e4066Sahrens */ 1664fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1665ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 1666ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 166789459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 166814843421SMatthew Ahrens if (fuid_dirtied) 166914843421SMatthew Ahrens zfs_fuid_txhold(zfsvfs, tx); 167089459e17SMark Shellenbaum if (acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) 1671fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1672fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 16731209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1674fa9e4066Sahrens if (error) { 167589459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1676fa9e4066Sahrens zfs_dirent_unlock(dl); 16771209a471SNeil Perrin if (error == ERESTART) { 16788a2f1b91Sahrens dmu_tx_wait(tx); 16798a2f1b91Sahrens dmu_tx_abort(tx); 1680fa9e4066Sahrens goto top; 1681fa9e4066Sahrens } 16828a2f1b91Sahrens dmu_tx_abort(tx); 1683fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1684fa9e4066Sahrens return (error); 1685fa9e4066Sahrens } 1686fa9e4066Sahrens 1687fa9e4066Sahrens /* 1688fa9e4066Sahrens * Create new node. 1689fa9e4066Sahrens */ 169089459e17SMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, &acl_ids); 1691fa9e4066Sahrens 169289459e17SMark Shellenbaum if (fuid_dirtied) 169389459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 1694fa9e4066Sahrens /* 1695fa9e4066Sahrens * Now put new name in parent dir. 1696fa9e4066Sahrens */ 1697fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1698fa9e4066Sahrens 1699fa9e4066Sahrens *vpp = ZTOV(zp); 1700fa9e4066Sahrens 1701da6c28aaSamw txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap); 1702da6c28aaSamw if (flags & FIGNORECASE) 1703da6c28aaSamw txtype |= TX_CI; 170489459e17SMark Shellenbaum zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, 170589459e17SMark Shellenbaum acl_ids.z_fuidp, vap); 1706da6c28aaSamw 170789459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1708fa9e4066Sahrens dmu_tx_commit(tx); 1709fa9e4066Sahrens 1710fa9e4066Sahrens zfs_dirent_unlock(dl); 1711fa9e4066Sahrens 1712fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1713fa9e4066Sahrens return (0); 1714fa9e4066Sahrens } 1715fa9e4066Sahrens 1716fa9e4066Sahrens /* 1717fa9e4066Sahrens * Remove a directory subdir entry. If the current working 1718fa9e4066Sahrens * directory is the same as the subdir to be removed, the 1719fa9e4066Sahrens * remove will fail. 1720fa9e4066Sahrens * 1721fa9e4066Sahrens * IN: dvp - vnode of directory to remove from. 1722fa9e4066Sahrens * name - name of directory to be removed. 1723fa9e4066Sahrens * cwd - vnode of current working directory. 1724fa9e4066Sahrens * cr - credentials of caller. 1725da6c28aaSamw * ct - caller context 1726da6c28aaSamw * flags - case flags 1727fa9e4066Sahrens * 1728fa9e4066Sahrens * RETURN: 0 if success 1729fa9e4066Sahrens * error code if failure 1730fa9e4066Sahrens * 1731fa9e4066Sahrens * Timestamps: 1732fa9e4066Sahrens * dvp - ctime|mtime updated 1733fa9e4066Sahrens */ 1734da6c28aaSamw /*ARGSUSED*/ 1735fa9e4066Sahrens static int 1736da6c28aaSamw zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr, 1737da6c28aaSamw caller_context_t *ct, int flags) 1738fa9e4066Sahrens { 1739fa9e4066Sahrens znode_t *dzp = VTOZ(dvp); 1740fa9e4066Sahrens znode_t *zp; 1741fa9e4066Sahrens vnode_t *vp; 1742fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1743f18faf3fSek zilog_t *zilog; 1744fa9e4066Sahrens zfs_dirlock_t *dl; 1745fa9e4066Sahrens dmu_tx_t *tx; 1746fa9e4066Sahrens int error; 1747da6c28aaSamw int zflg = ZEXISTS; 1748fa9e4066Sahrens 17493cb34c60Sahrens ZFS_ENTER(zfsvfs); 17503cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1751f18faf3fSek zilog = zfsvfs->z_log; 1752fa9e4066Sahrens 1753da6c28aaSamw if (flags & FIGNORECASE) 1754da6c28aaSamw zflg |= ZCILOOK; 1755fa9e4066Sahrens top: 1756fa9e4066Sahrens zp = NULL; 1757fa9e4066Sahrens 1758fa9e4066Sahrens /* 1759fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1760fa9e4066Sahrens */ 1761da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1762da6c28aaSamw NULL, NULL)) { 1763fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1764fa9e4066Sahrens return (error); 1765fa9e4066Sahrens } 1766fa9e4066Sahrens 1767fa9e4066Sahrens vp = ZTOV(zp); 1768fa9e4066Sahrens 1769fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1770fa9e4066Sahrens goto out; 1771fa9e4066Sahrens } 1772fa9e4066Sahrens 1773fa9e4066Sahrens if (vp->v_type != VDIR) { 1774fa9e4066Sahrens error = ENOTDIR; 1775fa9e4066Sahrens goto out; 1776fa9e4066Sahrens } 1777fa9e4066Sahrens 1778fa9e4066Sahrens if (vp == cwd) { 1779fa9e4066Sahrens error = EINVAL; 1780fa9e4066Sahrens goto out; 1781fa9e4066Sahrens } 1782fa9e4066Sahrens 1783da6c28aaSamw vnevent_rmdir(vp, dvp, name, ct); 1784fa9e4066Sahrens 1785fa9e4066Sahrens /* 1786af2c4821Smaybee * Grab a lock on the directory to make sure that noone is 1787af2c4821Smaybee * trying to add (or lookup) entries while we are removing it. 1788af2c4821Smaybee */ 1789af2c4821Smaybee rw_enter(&zp->z_name_lock, RW_WRITER); 1790af2c4821Smaybee 1791af2c4821Smaybee /* 1792af2c4821Smaybee * Grab a lock on the parent pointer to make sure we play well 1793fa9e4066Sahrens * with the treewalk and directory rename code. 1794fa9e4066Sahrens */ 1795fa9e4066Sahrens rw_enter(&zp->z_parent_lock, RW_WRITER); 1796fa9e4066Sahrens 1797fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1798ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1799fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1800893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 18011209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1802fa9e4066Sahrens if (error) { 1803fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1804af2c4821Smaybee rw_exit(&zp->z_name_lock); 1805fa9e4066Sahrens zfs_dirent_unlock(dl); 1806fa9e4066Sahrens VN_RELE(vp); 18071209a471SNeil Perrin if (error == ERESTART) { 18088a2f1b91Sahrens dmu_tx_wait(tx); 18098a2f1b91Sahrens dmu_tx_abort(tx); 1810fa9e4066Sahrens goto top; 1811fa9e4066Sahrens } 18128a2f1b91Sahrens dmu_tx_abort(tx); 1813fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1814fa9e4066Sahrens return (error); 1815fa9e4066Sahrens } 1816fa9e4066Sahrens 1817da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, NULL); 1818fa9e4066Sahrens 1819da6c28aaSamw if (error == 0) { 1820da6c28aaSamw uint64_t txtype = TX_RMDIR; 1821da6c28aaSamw if (flags & FIGNORECASE) 1822da6c28aaSamw txtype |= TX_CI; 1823da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1824da6c28aaSamw } 1825fa9e4066Sahrens 1826fa9e4066Sahrens dmu_tx_commit(tx); 1827fa9e4066Sahrens 1828fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1829af2c4821Smaybee rw_exit(&zp->z_name_lock); 1830fa9e4066Sahrens out: 1831fa9e4066Sahrens zfs_dirent_unlock(dl); 1832fa9e4066Sahrens 1833fa9e4066Sahrens VN_RELE(vp); 1834fa9e4066Sahrens 1835fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1836fa9e4066Sahrens return (error); 1837fa9e4066Sahrens } 1838fa9e4066Sahrens 1839fa9e4066Sahrens /* 1840fa9e4066Sahrens * Read as many directory entries as will fit into the provided 1841fa9e4066Sahrens * buffer from the given directory cursor position (specified in 1842fa9e4066Sahrens * the uio structure. 1843fa9e4066Sahrens * 1844fa9e4066Sahrens * IN: vp - vnode of directory to read. 1845fa9e4066Sahrens * uio - structure supplying read location, range info, 1846fa9e4066Sahrens * and return buffer. 1847fa9e4066Sahrens * cr - credentials of caller. 1848da6c28aaSamw * ct - caller context 1849da6c28aaSamw * flags - case flags 1850fa9e4066Sahrens * 1851fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 1852fa9e4066Sahrens * eofp - set to true if end-of-file detected. 1853fa9e4066Sahrens * 1854fa9e4066Sahrens * RETURN: 0 if success 1855fa9e4066Sahrens * error code if failure 1856fa9e4066Sahrens * 1857fa9e4066Sahrens * Timestamps: 1858fa9e4066Sahrens * vp - atime updated 1859fa9e4066Sahrens * 1860fa9e4066Sahrens * Note that the low 4 bits of the cookie returned by zap is always zero. 1861fa9e4066Sahrens * This allows us to use the low range for "special" directory entries: 1862fa9e4066Sahrens * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 1863fa9e4066Sahrens * we use the offset 2 for the '.zfs' directory. 1864fa9e4066Sahrens */ 1865fa9e4066Sahrens /* ARGSUSED */ 1866fa9e4066Sahrens static int 1867da6c28aaSamw zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, 1868da6c28aaSamw caller_context_t *ct, int flags) 1869fa9e4066Sahrens { 1870fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1871fa9e4066Sahrens iovec_t *iovp; 1872da6c28aaSamw edirent_t *eodp; 1873fa9e4066Sahrens dirent64_t *odp; 1874fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 18757f6e3e7dSperrin objset_t *os; 1876fa9e4066Sahrens caddr_t outbuf; 1877fa9e4066Sahrens size_t bufsize; 1878fa9e4066Sahrens zap_cursor_t zc; 1879fa9e4066Sahrens zap_attribute_t zap; 1880fa9e4066Sahrens uint_t bytes_wanted; 1881fa9e4066Sahrens uint64_t offset; /* must be unsigned; checks for < 1 */ 1882fa9e4066Sahrens int local_eof; 18837f6e3e7dSperrin int outcount; 18847f6e3e7dSperrin int error; 18857f6e3e7dSperrin uint8_t prefetch; 1886b38f0970Sck boolean_t check_sysattrs; 1887fa9e4066Sahrens 18883cb34c60Sahrens ZFS_ENTER(zfsvfs); 18893cb34c60Sahrens ZFS_VERIFY_ZP(zp); 1890fa9e4066Sahrens 1891fa9e4066Sahrens /* 1892fa9e4066Sahrens * If we are not given an eof variable, 1893fa9e4066Sahrens * use a local one. 1894fa9e4066Sahrens */ 1895fa9e4066Sahrens if (eofp == NULL) 1896fa9e4066Sahrens eofp = &local_eof; 1897fa9e4066Sahrens 1898fa9e4066Sahrens /* 1899fa9e4066Sahrens * Check for valid iov_len. 1900fa9e4066Sahrens */ 1901fa9e4066Sahrens if (uio->uio_iov->iov_len <= 0) { 1902fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1903fa9e4066Sahrens return (EINVAL); 1904fa9e4066Sahrens } 1905fa9e4066Sahrens 1906fa9e4066Sahrens /* 1907fa9e4066Sahrens * Quit if directory has been removed (posix) 1908fa9e4066Sahrens */ 1909893a6d32Sahrens if ((*eofp = zp->z_unlinked) != 0) { 1910fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1911fa9e4066Sahrens return (0); 1912fa9e4066Sahrens } 1913fa9e4066Sahrens 19147f6e3e7dSperrin error = 0; 19157f6e3e7dSperrin os = zfsvfs->z_os; 19167f6e3e7dSperrin offset = uio->uio_loffset; 19177f6e3e7dSperrin prefetch = zp->z_zn_prefetch; 19187f6e3e7dSperrin 1919fa9e4066Sahrens /* 1920fa9e4066Sahrens * Initialize the iterator cursor. 1921fa9e4066Sahrens */ 1922fa9e4066Sahrens if (offset <= 3) { 1923fa9e4066Sahrens /* 1924fa9e4066Sahrens * Start iteration from the beginning of the directory. 1925fa9e4066Sahrens */ 19267f6e3e7dSperrin zap_cursor_init(&zc, os, zp->z_id); 1927fa9e4066Sahrens } else { 1928fa9e4066Sahrens /* 1929fa9e4066Sahrens * The offset is a serialized cursor. 1930fa9e4066Sahrens */ 19317f6e3e7dSperrin zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 1932fa9e4066Sahrens } 1933fa9e4066Sahrens 1934fa9e4066Sahrens /* 1935fa9e4066Sahrens * Get space to change directory entries into fs independent format. 1936fa9e4066Sahrens */ 1937fa9e4066Sahrens iovp = uio->uio_iov; 1938fa9e4066Sahrens bytes_wanted = iovp->iov_len; 1939fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 1940fa9e4066Sahrens bufsize = bytes_wanted; 1941fa9e4066Sahrens outbuf = kmem_alloc(bufsize, KM_SLEEP); 1942fa9e4066Sahrens odp = (struct dirent64 *)outbuf; 1943fa9e4066Sahrens } else { 1944fa9e4066Sahrens bufsize = bytes_wanted; 1945fa9e4066Sahrens odp = (struct dirent64 *)iovp->iov_base; 1946fa9e4066Sahrens } 1947da6c28aaSamw eodp = (struct edirent *)odp; 1948fa9e4066Sahrens 1949b38f0970Sck /* 19509660e5cbSJanice Chang * If this VFS supports the system attribute view interface; and 19519660e5cbSJanice Chang * we're looking at an extended attribute directory; and we care 19529660e5cbSJanice Chang * about normalization conflicts on this vfs; then we must check 19539660e5cbSJanice Chang * for normalization conflicts with the sysattr name space. 1954b38f0970Sck */ 19559660e5cbSJanice Chang check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 1956b38f0970Sck (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm && 1957b38f0970Sck (flags & V_RDDIR_ENTFLAGS); 1958b38f0970Sck 1959fa9e4066Sahrens /* 1960fa9e4066Sahrens * Transform to file-system independent format 1961fa9e4066Sahrens */ 1962fa9e4066Sahrens outcount = 0; 1963fa9e4066Sahrens while (outcount < bytes_wanted) { 1964b1b8ab34Slling ino64_t objnum; 1965b1b8ab34Slling ushort_t reclen; 1966b1b8ab34Slling off64_t *next; 1967b1b8ab34Slling 1968fa9e4066Sahrens /* 1969fa9e4066Sahrens * Special case `.', `..', and `.zfs'. 1970fa9e4066Sahrens */ 1971fa9e4066Sahrens if (offset == 0) { 1972fa9e4066Sahrens (void) strcpy(zap.za_name, "."); 1973da6c28aaSamw zap.za_normalization_conflict = 0; 1974b1b8ab34Slling objnum = zp->z_id; 1975fa9e4066Sahrens } else if (offset == 1) { 1976fa9e4066Sahrens (void) strcpy(zap.za_name, ".."); 1977da6c28aaSamw zap.za_normalization_conflict = 0; 1978b1b8ab34Slling objnum = zp->z_phys->zp_parent; 1979fa9e4066Sahrens } else if (offset == 2 && zfs_show_ctldir(zp)) { 1980fa9e4066Sahrens (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 1981da6c28aaSamw zap.za_normalization_conflict = 0; 1982b1b8ab34Slling objnum = ZFSCTL_INO_ROOT; 1983fa9e4066Sahrens } else { 1984fa9e4066Sahrens /* 1985fa9e4066Sahrens * Grab next entry. 1986fa9e4066Sahrens */ 1987fa9e4066Sahrens if (error = zap_cursor_retrieve(&zc, &zap)) { 1988fa9e4066Sahrens if ((*eofp = (error == ENOENT)) != 0) 1989fa9e4066Sahrens break; 1990fa9e4066Sahrens else 1991fa9e4066Sahrens goto update; 1992fa9e4066Sahrens } 1993fa9e4066Sahrens 1994fa9e4066Sahrens if (zap.za_integer_length != 8 || 1995fa9e4066Sahrens zap.za_num_integers != 1) { 1996fa9e4066Sahrens cmn_err(CE_WARN, "zap_readdir: bad directory " 1997fa9e4066Sahrens "entry, obj = %lld, offset = %lld\n", 1998fa9e4066Sahrens (u_longlong_t)zp->z_id, 1999fa9e4066Sahrens (u_longlong_t)offset); 2000fa9e4066Sahrens error = ENXIO; 2001fa9e4066Sahrens goto update; 2002fa9e4066Sahrens } 2003b1b8ab34Slling 2004b1b8ab34Slling objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); 2005b1b8ab34Slling /* 2006b1b8ab34Slling * MacOS X can extract the object type here such as: 2007b1b8ab34Slling * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); 2008b1b8ab34Slling */ 2009b38f0970Sck 2010b38f0970Sck if (check_sysattrs && !zap.za_normalization_conflict) { 2011b38f0970Sck zap.za_normalization_conflict = 2012b38f0970Sck xattr_sysattr_casechk(zap.za_name); 2013b38f0970Sck } 2014fa9e4066Sahrens } 2015da6c28aaSamw 2016da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) 2017da6c28aaSamw reclen = EDIRENT_RECLEN(strlen(zap.za_name)); 2018da6c28aaSamw else 2019da6c28aaSamw reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 2020fa9e4066Sahrens 2021fa9e4066Sahrens /* 2022fa9e4066Sahrens * Will this entry fit in the buffer? 2023fa9e4066Sahrens */ 2024b1b8ab34Slling if (outcount + reclen > bufsize) { 2025fa9e4066Sahrens /* 2026fa9e4066Sahrens * Did we manage to fit anything in the buffer? 2027fa9e4066Sahrens */ 2028fa9e4066Sahrens if (!outcount) { 2029fa9e4066Sahrens error = EINVAL; 2030fa9e4066Sahrens goto update; 2031fa9e4066Sahrens } 2032fa9e4066Sahrens break; 2033fa9e4066Sahrens } 2034da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) { 2035da6c28aaSamw /* 2036da6c28aaSamw * Add extended flag entry: 2037da6c28aaSamw */ 2038da6c28aaSamw eodp->ed_ino = objnum; 2039da6c28aaSamw eodp->ed_reclen = reclen; 2040da6c28aaSamw /* NOTE: ed_off is the offset for the *next* entry */ 2041da6c28aaSamw next = &(eodp->ed_off); 2042da6c28aaSamw eodp->ed_eflags = zap.za_normalization_conflict ? 2043da6c28aaSamw ED_CASE_CONFLICT : 0; 2044da6c28aaSamw (void) strncpy(eodp->ed_name, zap.za_name, 2045da6c28aaSamw EDIRENT_NAMELEN(reclen)); 2046da6c28aaSamw eodp = (edirent_t *)((intptr_t)eodp + reclen); 2047da6c28aaSamw } else { 2048da6c28aaSamw /* 2049da6c28aaSamw * Add normal entry: 2050da6c28aaSamw */ 2051da6c28aaSamw odp->d_ino = objnum; 2052da6c28aaSamw odp->d_reclen = reclen; 2053da6c28aaSamw /* NOTE: d_off is the offset for the *next* entry */ 2054da6c28aaSamw next = &(odp->d_off); 2055da6c28aaSamw (void) strncpy(odp->d_name, zap.za_name, 2056da6c28aaSamw DIRENT64_NAMELEN(reclen)); 2057da6c28aaSamw odp = (dirent64_t *)((intptr_t)odp + reclen); 2058da6c28aaSamw } 2059b1b8ab34Slling outcount += reclen; 2060fa9e4066Sahrens 2061fa9e4066Sahrens ASSERT(outcount <= bufsize); 2062fa9e4066Sahrens 2063fa9e4066Sahrens /* Prefetch znode */ 20647f6e3e7dSperrin if (prefetch) 2065b1b8ab34Slling dmu_prefetch(os, objnum, 0, 0); 2066fa9e4066Sahrens 2067fa9e4066Sahrens /* 2068fa9e4066Sahrens * Move to the next entry, fill in the previous offset. 2069fa9e4066Sahrens */ 2070fa9e4066Sahrens if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 2071fa9e4066Sahrens zap_cursor_advance(&zc); 2072fa9e4066Sahrens offset = zap_cursor_serialize(&zc); 2073fa9e4066Sahrens } else { 2074fa9e4066Sahrens offset += 1; 2075fa9e4066Sahrens } 2076fa9e4066Sahrens *next = offset; 2077fa9e4066Sahrens } 20787f6e3e7dSperrin zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 2079fa9e4066Sahrens 2080fa9e4066Sahrens if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 2081fa9e4066Sahrens iovp->iov_base += outcount; 2082fa9e4066Sahrens iovp->iov_len -= outcount; 2083fa9e4066Sahrens uio->uio_resid -= outcount; 2084fa9e4066Sahrens } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 2085fa9e4066Sahrens /* 2086fa9e4066Sahrens * Reset the pointer. 2087fa9e4066Sahrens */ 2088fa9e4066Sahrens offset = uio->uio_loffset; 2089fa9e4066Sahrens } 2090fa9e4066Sahrens 2091fa9e4066Sahrens update: 209287e5029aSahrens zap_cursor_fini(&zc); 2093fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2094fa9e4066Sahrens kmem_free(outbuf, bufsize); 2095fa9e4066Sahrens 2096fa9e4066Sahrens if (error == ENOENT) 2097fa9e4066Sahrens error = 0; 2098fa9e4066Sahrens 2099fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2100fa9e4066Sahrens 2101fa9e4066Sahrens uio->uio_loffset = offset; 2102fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2103fa9e4066Sahrens return (error); 2104fa9e4066Sahrens } 2105fa9e4066Sahrens 2106ec533521Sfr ulong_t zfs_fsync_sync_cnt = 4; 2107ec533521Sfr 2108fa9e4066Sahrens static int 2109da6c28aaSamw zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 2110fa9e4066Sahrens { 2111fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2112fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2113fa9e4066Sahrens 2114b468a217Seschrock /* 2115b468a217Seschrock * Regardless of whether this is required for standards conformance, 2116b468a217Seschrock * this is the logical behavior when fsync() is called on a file with 2117b468a217Seschrock * dirty pages. We use B_ASYNC since the ZIL transactions are already 2118b468a217Seschrock * going to be pushed out as part of the zil_commit(). 2119b468a217Seschrock */ 2120b468a217Seschrock if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && 2121b468a217Seschrock (vp->v_type == VREG) && !(IS_SWAPVP(vp))) 2122da6c28aaSamw (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr, ct); 2123b468a217Seschrock 2124ec533521Sfr (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt); 2125ec533521Sfr 21263cb34c60Sahrens ZFS_ENTER(zfsvfs); 21273cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2128b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 2129fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2130fa9e4066Sahrens return (0); 2131fa9e4066Sahrens } 2132fa9e4066Sahrens 2133da6c28aaSamw 2134fa9e4066Sahrens /* 2135fa9e4066Sahrens * Get the requested file attributes and place them in the provided 2136fa9e4066Sahrens * vattr structure. 2137fa9e4066Sahrens * 2138fa9e4066Sahrens * IN: vp - vnode of file. 2139fa9e4066Sahrens * vap - va_mask identifies requested attributes. 2140da6c28aaSamw * If AT_XVATTR set, then optional attrs are requested 2141da6c28aaSamw * flags - ATTR_NOACLCHECK (CIFS server context) 2142fa9e4066Sahrens * cr - credentials of caller. 2143da6c28aaSamw * ct - caller context 2144fa9e4066Sahrens * 2145fa9e4066Sahrens * OUT: vap - attribute values. 2146fa9e4066Sahrens * 2147fa9e4066Sahrens * RETURN: 0 (always succeeds) 2148fa9e4066Sahrens */ 2149fa9e4066Sahrens /* ARGSUSED */ 2150fa9e4066Sahrens static int 2151da6c28aaSamw zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2152da6c28aaSamw caller_context_t *ct) 2153fa9e4066Sahrens { 2154fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2155fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2156f18faf3fSek znode_phys_t *pzp; 2157da6c28aaSamw int error = 0; 2158ecd6cf80Smarks uint64_t links; 2159da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2160da6c28aaSamw xoptattr_t *xoap = NULL; 2161da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2162fa9e4066Sahrens 21633cb34c60Sahrens ZFS_ENTER(zfsvfs); 21643cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2165f18faf3fSek pzp = zp->z_phys; 2166fa9e4066Sahrens 2167da6c28aaSamw mutex_enter(&zp->z_lock); 2168da6c28aaSamw 2169da6c28aaSamw /* 2170da6c28aaSamw * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 2171da6c28aaSamw * Also, if we are the owner don't bother, since owner should 2172da6c28aaSamw * always be allowed to read basic attributes of file. 2173da6c28aaSamw */ 2174da6c28aaSamw if (!(pzp->zp_flags & ZFS_ACL_TRIVIAL) && 2175da6c28aaSamw (pzp->zp_uid != crgetuid(cr))) { 2176da6c28aaSamw if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0, 2177da6c28aaSamw skipaclchk, cr)) { 2178da6c28aaSamw mutex_exit(&zp->z_lock); 2179da6c28aaSamw ZFS_EXIT(zfsvfs); 2180da6c28aaSamw return (error); 2181da6c28aaSamw } 2182da6c28aaSamw } 2183da6c28aaSamw 2184fa9e4066Sahrens /* 2185fa9e4066Sahrens * Return all attributes. It's cheaper to provide the answer 2186fa9e4066Sahrens * than to determine whether we were asked the question. 2187fa9e4066Sahrens */ 2188fa9e4066Sahrens 2189fa9e4066Sahrens vap->va_type = vp->v_type; 2190fa9e4066Sahrens vap->va_mode = pzp->zp_mode & MODEMASK; 2191bda89588Sjp zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid); 2192fa9e4066Sahrens vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 2193fa9e4066Sahrens vap->va_nodeid = zp->z_id; 2194ecd6cf80Smarks if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp)) 2195ecd6cf80Smarks links = pzp->zp_links + 1; 2196ecd6cf80Smarks else 2197ecd6cf80Smarks links = pzp->zp_links; 2198ecd6cf80Smarks vap->va_nlink = MIN(links, UINT32_MAX); /* nlink_t limit! */ 2199fa9e4066Sahrens vap->va_size = pzp->zp_size; 220072fc53bcSmarks vap->va_rdev = vp->v_rdev; 2201fa9e4066Sahrens vap->va_seq = zp->z_seq; 2202fa9e4066Sahrens 2203fa9e4066Sahrens /* 2204da6c28aaSamw * Add in any requested optional attributes and the create time. 2205da6c28aaSamw * Also set the corresponding bits in the returned attribute bitmap. 2206fa9e4066Sahrens */ 2207da6c28aaSamw if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) { 2208da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 2209da6c28aaSamw xoap->xoa_archive = 2210da6c28aaSamw ((pzp->zp_flags & ZFS_ARCHIVE) != 0); 2211da6c28aaSamw XVA_SET_RTN(xvap, XAT_ARCHIVE); 2212da6c28aaSamw } 2213da6c28aaSamw 2214da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 2215da6c28aaSamw xoap->xoa_readonly = 2216da6c28aaSamw ((pzp->zp_flags & ZFS_READONLY) != 0); 2217da6c28aaSamw XVA_SET_RTN(xvap, XAT_READONLY); 2218da6c28aaSamw } 2219da6c28aaSamw 2220da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 2221da6c28aaSamw xoap->xoa_system = 2222da6c28aaSamw ((pzp->zp_flags & ZFS_SYSTEM) != 0); 2223da6c28aaSamw XVA_SET_RTN(xvap, XAT_SYSTEM); 2224da6c28aaSamw } 2225da6c28aaSamw 2226da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 2227da6c28aaSamw xoap->xoa_hidden = 2228da6c28aaSamw ((pzp->zp_flags & ZFS_HIDDEN) != 0); 2229da6c28aaSamw XVA_SET_RTN(xvap, XAT_HIDDEN); 2230da6c28aaSamw } 2231da6c28aaSamw 2232da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2233da6c28aaSamw xoap->xoa_nounlink = 2234da6c28aaSamw ((pzp->zp_flags & ZFS_NOUNLINK) != 0); 2235da6c28aaSamw XVA_SET_RTN(xvap, XAT_NOUNLINK); 2236da6c28aaSamw } 2237da6c28aaSamw 2238da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2239da6c28aaSamw xoap->xoa_immutable = 2240da6c28aaSamw ((pzp->zp_flags & ZFS_IMMUTABLE) != 0); 2241da6c28aaSamw XVA_SET_RTN(xvap, XAT_IMMUTABLE); 2242da6c28aaSamw } 2243da6c28aaSamw 2244da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2245da6c28aaSamw xoap->xoa_appendonly = 2246da6c28aaSamw ((pzp->zp_flags & ZFS_APPENDONLY) != 0); 2247da6c28aaSamw XVA_SET_RTN(xvap, XAT_APPENDONLY); 2248da6c28aaSamw } 2249da6c28aaSamw 2250da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2251da6c28aaSamw xoap->xoa_nodump = 2252da6c28aaSamw ((pzp->zp_flags & ZFS_NODUMP) != 0); 2253da6c28aaSamw XVA_SET_RTN(xvap, XAT_NODUMP); 2254da6c28aaSamw } 2255da6c28aaSamw 2256da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 2257da6c28aaSamw xoap->xoa_opaque = 2258da6c28aaSamw ((pzp->zp_flags & ZFS_OPAQUE) != 0); 2259da6c28aaSamw XVA_SET_RTN(xvap, XAT_OPAQUE); 2260da6c28aaSamw } 2261da6c28aaSamw 2262da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2263da6c28aaSamw xoap->xoa_av_quarantined = 2264da6c28aaSamw ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0); 2265da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 2266da6c28aaSamw } 2267da6c28aaSamw 2268da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2269da6c28aaSamw xoap->xoa_av_modified = 2270da6c28aaSamw ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0); 2271da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 2272da6c28aaSamw } 2273da6c28aaSamw 2274da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) && 2275da6c28aaSamw vp->v_type == VREG && 2276da6c28aaSamw (pzp->zp_flags & ZFS_BONUS_SCANSTAMP)) { 2277da6c28aaSamw size_t len; 2278da6c28aaSamw dmu_object_info_t doi; 2279da6c28aaSamw 2280da6c28aaSamw /* 2281da6c28aaSamw * Only VREG files have anti-virus scanstamps, so we 2282da6c28aaSamw * won't conflict with symlinks in the bonus buffer. 2283da6c28aaSamw */ 2284da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2285da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2286da6c28aaSamw sizeof (znode_phys_t); 2287da6c28aaSamw if (len <= doi.doi_bonus_size) { 2288da6c28aaSamw /* 2289da6c28aaSamw * pzp points to the start of the 2290da6c28aaSamw * znode_phys_t. pzp + 1 points to the 2291da6c28aaSamw * first byte after the znode_phys_t. 2292da6c28aaSamw */ 2293da6c28aaSamw (void) memcpy(xoap->xoa_av_scanstamp, 2294da6c28aaSamw pzp + 1, 2295da6c28aaSamw sizeof (xoap->xoa_av_scanstamp)); 2296da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); 2297da6c28aaSamw } 2298da6c28aaSamw } 2299da6c28aaSamw 2300da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 2301da6c28aaSamw ZFS_TIME_DECODE(&xoap->xoa_createtime, pzp->zp_crtime); 2302da6c28aaSamw XVA_SET_RTN(xvap, XAT_CREATETIME); 2303fa9e4066Sahrens } 2304fa9e4066Sahrens } 2305fa9e4066Sahrens 2306da6c28aaSamw ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime); 2307da6c28aaSamw ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime); 2308da6c28aaSamw ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime); 2309da6c28aaSamw 2310fa9e4066Sahrens mutex_exit(&zp->z_lock); 2311fa9e4066Sahrens 2312fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks); 2313fa9e4066Sahrens 2314fa9e4066Sahrens if (zp->z_blksz == 0) { 2315fa9e4066Sahrens /* 2316fa9e4066Sahrens * Block size hasn't been set; suggest maximal I/O transfers. 2317fa9e4066Sahrens */ 2318fa9e4066Sahrens vap->va_blksize = zfsvfs->z_max_blksz; 2319fa9e4066Sahrens } 2320fa9e4066Sahrens 2321fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2322fa9e4066Sahrens return (0); 2323fa9e4066Sahrens } 2324fa9e4066Sahrens 2325fa9e4066Sahrens /* 2326fa9e4066Sahrens * Set the file attributes to the values contained in the 2327fa9e4066Sahrens * vattr structure. 2328fa9e4066Sahrens * 2329fa9e4066Sahrens * IN: vp - vnode of file to be modified. 2330fa9e4066Sahrens * vap - new attribute values. 2331da6c28aaSamw * If AT_XVATTR set, then optional attrs are being set 2332fa9e4066Sahrens * flags - ATTR_UTIME set if non-default time values provided. 2333da6c28aaSamw * - ATTR_NOACLCHECK (CIFS context only). 2334fa9e4066Sahrens * cr - credentials of caller. 2335da6c28aaSamw * ct - caller context 2336fa9e4066Sahrens * 2337fa9e4066Sahrens * RETURN: 0 if success 2338fa9e4066Sahrens * error code if failure 2339fa9e4066Sahrens * 2340fa9e4066Sahrens * Timestamps: 2341fa9e4066Sahrens * vp - ctime updated, mtime updated if size changed. 2342fa9e4066Sahrens */ 2343fa9e4066Sahrens /* ARGSUSED */ 2344fa9e4066Sahrens static int 2345fa9e4066Sahrens zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2346fa9e4066Sahrens caller_context_t *ct) 2347fa9e4066Sahrens { 2348f18faf3fSek znode_t *zp = VTOZ(vp); 2349f18faf3fSek znode_phys_t *pzp; 2350fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2351f18faf3fSek zilog_t *zilog; 2352fa9e4066Sahrens dmu_tx_t *tx; 2353fa9e4066Sahrens vattr_t oldva; 2354ae4caef8SMark Shellenbaum xvattr_t tmpxvattr; 23555730cc9aSmaybee uint_t mask = vap->va_mask; 23565730cc9aSmaybee uint_t saved_mask; 2357f92daba9Smarks int trim_mask = 0; 2358fa9e4066Sahrens uint64_t new_mode; 235989459e17SMark Shellenbaum uint64_t new_uid, new_gid; 2360d2443e76Smarks znode_t *attrzp; 2361fa9e4066Sahrens int need_policy = FALSE; 2362fa9e4066Sahrens int err; 2363da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 2364da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2365da6c28aaSamw xoptattr_t *xoap; 23664c841f60Smarks zfs_acl_t *aclp = NULL; 2367da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 236889459e17SMark Shellenbaum boolean_t fuid_dirtied = B_FALSE; 2369fa9e4066Sahrens 2370fa9e4066Sahrens if (mask == 0) 2371fa9e4066Sahrens return (0); 2372fa9e4066Sahrens 2373fa9e4066Sahrens if (mask & AT_NOSET) 2374fa9e4066Sahrens return (EINVAL); 2375fa9e4066Sahrens 23763cb34c60Sahrens ZFS_ENTER(zfsvfs); 23773cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2378da6c28aaSamw 2379da6c28aaSamw pzp = zp->z_phys; 2380da6c28aaSamw zilog = zfsvfs->z_log; 2381da6c28aaSamw 2382da6c28aaSamw /* 2383da6c28aaSamw * Make sure that if we have ephemeral uid/gid or xvattr specified 2384da6c28aaSamw * that file system is at proper version level 2385da6c28aaSamw */ 2386da6c28aaSamw 2387da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 2388da6c28aaSamw (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 2389da6c28aaSamw ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) || 239002dcba3bStimh (mask & AT_XVATTR))) { 239102dcba3bStimh ZFS_EXIT(zfsvfs); 2392da6c28aaSamw return (EINVAL); 239302dcba3bStimh } 2394da6c28aaSamw 239502dcba3bStimh if (mask & AT_SIZE && vp->v_type == VDIR) { 239602dcba3bStimh ZFS_EXIT(zfsvfs); 2397fa9e4066Sahrens return (EISDIR); 239802dcba3bStimh } 2399fa9e4066Sahrens 240002dcba3bStimh if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) { 240102dcba3bStimh ZFS_EXIT(zfsvfs); 240284c5a155Smarks return (EINVAL); 240302dcba3bStimh } 240484c5a155Smarks 2405da6c28aaSamw /* 2406da6c28aaSamw * If this is an xvattr_t, then get a pointer to the structure of 2407da6c28aaSamw * optional attributes. If this is NULL, then we have a vattr_t. 2408da6c28aaSamw */ 2409da6c28aaSamw xoap = xva_getxoptattr(xvap); 2410da6c28aaSamw 2411ae4caef8SMark Shellenbaum xva_init(&tmpxvattr); 2412ae4caef8SMark Shellenbaum 2413da6c28aaSamw /* 2414da6c28aaSamw * Immutable files can only alter immutable bit and atime 2415da6c28aaSamw */ 2416da6c28aaSamw if ((pzp->zp_flags & ZFS_IMMUTABLE) && 2417da6c28aaSamw ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) || 241802dcba3bStimh ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { 241902dcba3bStimh ZFS_EXIT(zfsvfs); 2420da6c28aaSamw return (EPERM); 242102dcba3bStimh } 2422da6c28aaSamw 242302dcba3bStimh if ((mask & AT_SIZE) && (pzp->zp_flags & ZFS_READONLY)) { 242402dcba3bStimh ZFS_EXIT(zfsvfs); 2425da6c28aaSamw return (EPERM); 242602dcba3bStimh } 2427fa9e4066Sahrens 242893129341Smarks /* 242993129341Smarks * Verify timestamps doesn't overflow 32 bits. 243093129341Smarks * ZFS can handle large timestamps, but 32bit syscalls can't 243193129341Smarks * handle times greater than 2039. This check should be removed 243293129341Smarks * once large timestamps are fully supported. 243393129341Smarks */ 243493129341Smarks if (mask & (AT_ATIME | AT_MTIME)) { 243593129341Smarks if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || 243693129341Smarks ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { 243793129341Smarks ZFS_EXIT(zfsvfs); 243893129341Smarks return (EOVERFLOW); 243993129341Smarks } 244093129341Smarks } 244193129341Smarks 2442fa9e4066Sahrens top: 2443d2443e76Smarks attrzp = NULL; 2444fa9e4066Sahrens 2445fa9e4066Sahrens if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 2446fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2447fa9e4066Sahrens return (EROFS); 2448fa9e4066Sahrens } 2449fa9e4066Sahrens 2450fa9e4066Sahrens /* 2451fa9e4066Sahrens * First validate permissions 2452fa9e4066Sahrens */ 2453fa9e4066Sahrens 2454fa9e4066Sahrens if (mask & AT_SIZE) { 2455da6c28aaSamw err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr); 2456fa9e4066Sahrens if (err) { 2457fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2458fa9e4066Sahrens return (err); 2459fa9e4066Sahrens } 24605730cc9aSmaybee /* 24615730cc9aSmaybee * XXX - Note, we are not providing any open 24625730cc9aSmaybee * mode flags here (like FNDELAY), so we may 24635730cc9aSmaybee * block if there are locks present... this 24645730cc9aSmaybee * should be addressed in openat(). 24655730cc9aSmaybee */ 2466cdb0ab79Smaybee /* XXX - would it be OK to generate a log record here? */ 2467cdb0ab79Smaybee err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 24685730cc9aSmaybee if (err) { 24695730cc9aSmaybee ZFS_EXIT(zfsvfs); 24705730cc9aSmaybee return (err); 24715730cc9aSmaybee } 2472fa9e4066Sahrens } 2473fa9e4066Sahrens 2474da6c28aaSamw if (mask & (AT_ATIME|AT_MTIME) || 2475da6c28aaSamw ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || 2476da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_READONLY) || 2477da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || 2478da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_CREATETIME) || 2479da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) 2480da6c28aaSamw need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, 2481da6c28aaSamw skipaclchk, cr); 2482fa9e4066Sahrens 2483fa9e4066Sahrens if (mask & (AT_UID|AT_GID)) { 2484fa9e4066Sahrens int idmask = (mask & (AT_UID|AT_GID)); 2485fa9e4066Sahrens int take_owner; 2486fa9e4066Sahrens int take_group; 2487fa9e4066Sahrens 2488a933bc41Smarks /* 2489a933bc41Smarks * NOTE: even if a new mode is being set, 2490a933bc41Smarks * we may clear S_ISUID/S_ISGID bits. 2491a933bc41Smarks */ 2492a933bc41Smarks 2493a933bc41Smarks if (!(mask & AT_MODE)) 2494a933bc41Smarks vap->va_mode = pzp->zp_mode; 2495a933bc41Smarks 2496fa9e4066Sahrens /* 2497fa9e4066Sahrens * Take ownership or chgrp to group we are a member of 2498fa9e4066Sahrens */ 2499fa9e4066Sahrens 2500fa9e4066Sahrens take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 2501da6c28aaSamw take_group = (mask & AT_GID) && 2502da6c28aaSamw zfs_groupmember(zfsvfs, vap->va_gid, cr); 2503fa9e4066Sahrens 2504fa9e4066Sahrens /* 2505fa9e4066Sahrens * If both AT_UID and AT_GID are set then take_owner and 2506fa9e4066Sahrens * take_group must both be set in order to allow taking 2507fa9e4066Sahrens * ownership. 2508fa9e4066Sahrens * 2509fa9e4066Sahrens * Otherwise, send the check through secpolicy_vnode_setattr() 2510fa9e4066Sahrens * 2511fa9e4066Sahrens */ 2512fa9e4066Sahrens 2513fa9e4066Sahrens if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 2514fa9e4066Sahrens ((idmask == AT_UID) && take_owner) || 2515fa9e4066Sahrens ((idmask == AT_GID) && take_group)) { 2516da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, 2517da6c28aaSamw skipaclchk, cr) == 0) { 2518fa9e4066Sahrens /* 2519fa9e4066Sahrens * Remove setuid/setgid for non-privileged users 2520fa9e4066Sahrens */ 252113f9f30eSmarks secpolicy_setid_clear(vap, cr); 2522f92daba9Smarks trim_mask = (mask & (AT_UID|AT_GID)); 2523fa9e4066Sahrens } else { 2524fa9e4066Sahrens need_policy = TRUE; 2525fa9e4066Sahrens } 2526fa9e4066Sahrens } else { 2527fa9e4066Sahrens need_policy = TRUE; 2528fa9e4066Sahrens } 2529fa9e4066Sahrens } 2530fa9e4066Sahrens 2531f92daba9Smarks mutex_enter(&zp->z_lock); 2532f92daba9Smarks oldva.va_mode = pzp->zp_mode; 2533bda89588Sjp zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); 2534da6c28aaSamw if (mask & AT_XVATTR) { 2535ae4caef8SMark Shellenbaum /* 2536ae4caef8SMark Shellenbaum * Update xvattr mask to include only those attributes 2537ae4caef8SMark Shellenbaum * that are actually changing. 2538ae4caef8SMark Shellenbaum * 2539ae4caef8SMark Shellenbaum * the bits will be restored prior to actually setting 2540ae4caef8SMark Shellenbaum * the attributes so the caller thinks they were set. 2541ae4caef8SMark Shellenbaum */ 2542ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2543ae4caef8SMark Shellenbaum if (xoap->xoa_appendonly != 2544ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_APPENDONLY) != 0)) { 2545ae4caef8SMark Shellenbaum need_policy = TRUE; 2546ae4caef8SMark Shellenbaum } else { 2547ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_APPENDONLY); 2548ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY); 2549ae4caef8SMark Shellenbaum } 2550ae4caef8SMark Shellenbaum } 2551ae4caef8SMark Shellenbaum 2552ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2553ae4caef8SMark Shellenbaum if (xoap->xoa_nounlink != 2554ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_NOUNLINK) != 0)) { 2555ae4caef8SMark Shellenbaum need_policy = TRUE; 2556ae4caef8SMark Shellenbaum } else { 2557ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_NOUNLINK); 2558ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK); 2559ae4caef8SMark Shellenbaum } 2560ae4caef8SMark Shellenbaum } 2561ae4caef8SMark Shellenbaum 2562ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2563ae4caef8SMark Shellenbaum if (xoap->xoa_immutable != 2564ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_IMMUTABLE) != 0)) { 2565ae4caef8SMark Shellenbaum need_policy = TRUE; 2566ae4caef8SMark Shellenbaum } else { 2567ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_IMMUTABLE); 2568ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE); 2569ae4caef8SMark Shellenbaum } 2570ae4caef8SMark Shellenbaum } 2571ae4caef8SMark Shellenbaum 2572ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2573ae4caef8SMark Shellenbaum if (xoap->xoa_nodump != 2574ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_NODUMP) != 0)) { 2575ae4caef8SMark Shellenbaum need_policy = TRUE; 2576ae4caef8SMark Shellenbaum } else { 2577ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_NODUMP); 2578ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_NODUMP); 2579ae4caef8SMark Shellenbaum } 2580ae4caef8SMark Shellenbaum } 2581ae4caef8SMark Shellenbaum 2582ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2583ae4caef8SMark Shellenbaum if (xoap->xoa_av_modified != 2584ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0)) { 2585ae4caef8SMark Shellenbaum need_policy = TRUE; 2586ae4caef8SMark Shellenbaum } else { 2587ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_AV_MODIFIED); 2588ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED); 2589ae4caef8SMark Shellenbaum } 2590ae4caef8SMark Shellenbaum } 2591ae4caef8SMark Shellenbaum 2592ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2593ae4caef8SMark Shellenbaum if ((vp->v_type != VREG && 2594ae4caef8SMark Shellenbaum xoap->xoa_av_quarantined) || 2595ae4caef8SMark Shellenbaum xoap->xoa_av_quarantined != 2596ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0)) { 2597ae4caef8SMark Shellenbaum need_policy = TRUE; 2598ae4caef8SMark Shellenbaum } else { 2599ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED); 2600ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED); 2601ae4caef8SMark Shellenbaum } 2602ae4caef8SMark Shellenbaum } 2603ae4caef8SMark Shellenbaum 2604ae4caef8SMark Shellenbaum if (need_policy == FALSE && 2605ae4caef8SMark Shellenbaum (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) || 2606ae4caef8SMark Shellenbaum XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { 2607da6c28aaSamw need_policy = TRUE; 2608da6c28aaSamw } 2609da6c28aaSamw } 2610da6c28aaSamw 2611f92daba9Smarks mutex_exit(&zp->z_lock); 2612fa9e4066Sahrens 2613f92daba9Smarks if (mask & AT_MODE) { 2614da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) { 2615f92daba9Smarks err = secpolicy_setid_setsticky_clear(vp, vap, 2616f92daba9Smarks &oldva, cr); 2617f92daba9Smarks if (err) { 2618f92daba9Smarks ZFS_EXIT(zfsvfs); 2619f92daba9Smarks return (err); 2620f92daba9Smarks } 2621f92daba9Smarks trim_mask |= AT_MODE; 2622f92daba9Smarks } else { 2623f92daba9Smarks need_policy = TRUE; 2624f92daba9Smarks } 2625f92daba9Smarks } 262613f9f30eSmarks 2627f92daba9Smarks if (need_policy) { 262813f9f30eSmarks /* 262913f9f30eSmarks * If trim_mask is set then take ownership 2630f92daba9Smarks * has been granted or write_acl is present and user 2631f92daba9Smarks * has the ability to modify mode. In that case remove 2632f92daba9Smarks * UID|GID and or MODE from mask so that 263313f9f30eSmarks * secpolicy_vnode_setattr() doesn't revoke it. 263413f9f30eSmarks */ 263513f9f30eSmarks 2636f92daba9Smarks if (trim_mask) { 2637f92daba9Smarks saved_mask = vap->va_mask; 2638f92daba9Smarks vap->va_mask &= ~trim_mask; 2639f92daba9Smarks } 2640fa9e4066Sahrens err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 2641da6c28aaSamw (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp); 2642fa9e4066Sahrens if (err) { 2643fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2644fa9e4066Sahrens return (err); 2645fa9e4066Sahrens } 264613f9f30eSmarks 264713f9f30eSmarks if (trim_mask) 2648f92daba9Smarks vap->va_mask |= saved_mask; 2649fa9e4066Sahrens } 2650fa9e4066Sahrens 2651fa9e4066Sahrens /* 2652fa9e4066Sahrens * secpolicy_vnode_setattr, or take ownership may have 2653fa9e4066Sahrens * changed va_mask 2654fa9e4066Sahrens */ 2655fa9e4066Sahrens mask = vap->va_mask; 2656fa9e4066Sahrens 2657fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2658fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 2659fa9e4066Sahrens 2660fa9e4066Sahrens if (mask & AT_MODE) { 2661169cdae2Smarks uint64_t pmode = pzp->zp_mode; 2662fa9e4066Sahrens 2663169cdae2Smarks new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 2664fa9e4066Sahrens 266514843421SMatthew Ahrens if (err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)) 266614843421SMatthew Ahrens goto out; 2667da6c28aaSamw if (pzp->zp_acl.z_acl_extern_obj) { 2668da6c28aaSamw /* Are we upgrading ACL from old V0 format to new V1 */ 2669da6c28aaSamw if (zfsvfs->z_version <= ZPL_VERSION_FUID && 2670da6c28aaSamw pzp->zp_acl.z_acl_version == 2671da6c28aaSamw ZFS_ACL_VERSION_INITIAL) { 2672da6c28aaSamw dmu_tx_hold_free(tx, 2673da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 2674da6c28aaSamw DMU_OBJECT_END); 2675da6c28aaSamw dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 26764c841f60Smarks 0, aclp->z_acl_bytes); 2677da6c28aaSamw } else { 2678da6c28aaSamw dmu_tx_hold_write(tx, 2679da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 26804c841f60Smarks aclp->z_acl_bytes); 26814c841f60Smarks } 26826d38e247Smarks } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) { 26836d38e247Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 26846d38e247Smarks 0, aclp->z_acl_bytes); 2685da6c28aaSamw } 2686fa9e4066Sahrens } 2687fa9e4066Sahrens 268889459e17SMark Shellenbaum if (mask & (AT_UID | AT_GID)) { 268989459e17SMark Shellenbaum if (pzp->zp_xattr) { 269089459e17SMark Shellenbaum err = zfs_zget(zp->z_zfsvfs, pzp->zp_xattr, &attrzp); 269114843421SMatthew Ahrens if (err) 269214843421SMatthew Ahrens goto out; 269389459e17SMark Shellenbaum dmu_tx_hold_bonus(tx, attrzp->z_id); 269489459e17SMark Shellenbaum } 269589459e17SMark Shellenbaum if (mask & AT_UID) { 269689459e17SMark Shellenbaum new_uid = zfs_fuid_create(zfsvfs, 269789459e17SMark Shellenbaum (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp); 269814843421SMatthew Ahrens if (new_uid != pzp->zp_uid && 269914843421SMatthew Ahrens zfs_usergroup_overquota(zfsvfs, B_FALSE, new_uid)) { 270014843421SMatthew Ahrens err = EDQUOT; 270114843421SMatthew Ahrens goto out; 270214843421SMatthew Ahrens } 270389459e17SMark Shellenbaum } 270414843421SMatthew Ahrens 270589459e17SMark Shellenbaum if (mask & AT_GID) { 270689459e17SMark Shellenbaum new_gid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid, 270789459e17SMark Shellenbaum cr, ZFS_GROUP, &fuidp); 270814843421SMatthew Ahrens if (new_gid != pzp->zp_gid && 270914843421SMatthew Ahrens zfs_usergroup_overquota(zfsvfs, B_TRUE, new_gid)) { 271014843421SMatthew Ahrens err = EDQUOT; 271114843421SMatthew Ahrens goto out; 271214843421SMatthew Ahrens } 271389459e17SMark Shellenbaum } 271489459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 271589459e17SMark Shellenbaum if (fuid_dirtied) { 271689459e17SMark Shellenbaum if (zfsvfs->z_fuid_obj == 0) { 271789459e17SMark Shellenbaum dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 271889459e17SMark Shellenbaum dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 271989459e17SMark Shellenbaum FUID_SIZE_ESTIMATE(zfsvfs)); 272089459e17SMark Shellenbaum dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, 272189459e17SMark Shellenbaum FALSE, NULL); 272289459e17SMark Shellenbaum } else { 272389459e17SMark Shellenbaum dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 272489459e17SMark Shellenbaum dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 272589459e17SMark Shellenbaum FUID_SIZE_ESTIMATE(zfsvfs)); 272689459e17SMark Shellenbaum } 2727d2443e76Smarks } 2728d2443e76Smarks } 2729d2443e76Smarks 27301209a471SNeil Perrin err = dmu_tx_assign(tx, TXG_NOWAIT); 2731fa9e4066Sahrens if (err) { 273214843421SMatthew Ahrens if (err == ERESTART) 27338a2f1b91Sahrens dmu_tx_wait(tx); 273414843421SMatthew Ahrens goto out; 2735fa9e4066Sahrens } 2736fa9e4066Sahrens 2737fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 2738fa9e4066Sahrens 2739fa9e4066Sahrens /* 2740fa9e4066Sahrens * Set each attribute requested. 2741fa9e4066Sahrens * We group settings according to the locks they need to acquire. 2742fa9e4066Sahrens * 2743fa9e4066Sahrens * Note: you cannot set ctime directly, although it will be 2744fa9e4066Sahrens * updated as a side-effect of calling this function. 2745fa9e4066Sahrens */ 2746fa9e4066Sahrens 2747fa9e4066Sahrens mutex_enter(&zp->z_lock); 2748fa9e4066Sahrens 2749fa9e4066Sahrens if (mask & AT_MODE) { 27504c841f60Smarks mutex_enter(&zp->z_acl_lock); 27514c841f60Smarks zp->z_phys->zp_mode = new_mode; 275289459e17SMark Shellenbaum err = zfs_aclset_common(zp, aclp, cr, tx); 2753fa9e4066Sahrens ASSERT3U(err, ==, 0); 27544c841f60Smarks mutex_exit(&zp->z_acl_lock); 2755fa9e4066Sahrens } 2756fa9e4066Sahrens 2757d2443e76Smarks if (attrzp) 2758d2443e76Smarks mutex_enter(&attrzp->z_lock); 2759d2443e76Smarks 2760d2443e76Smarks if (mask & AT_UID) { 276189459e17SMark Shellenbaum pzp->zp_uid = new_uid; 276289459e17SMark Shellenbaum if (attrzp) 276389459e17SMark Shellenbaum attrzp->z_phys->zp_uid = new_uid; 2764d2443e76Smarks } 2765fa9e4066Sahrens 2766d2443e76Smarks if (mask & AT_GID) { 276789459e17SMark Shellenbaum pzp->zp_gid = new_gid; 2768d2443e76Smarks if (attrzp) 276989459e17SMark Shellenbaum attrzp->z_phys->zp_gid = new_gid; 2770d2443e76Smarks } 2771d2443e76Smarks 2772d2443e76Smarks if (attrzp) 2773d2443e76Smarks mutex_exit(&attrzp->z_lock); 2774fa9e4066Sahrens 2775fa9e4066Sahrens if (mask & AT_ATIME) 2776fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 2777fa9e4066Sahrens 2778fa9e4066Sahrens if (mask & AT_MTIME) 2779fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 2780fa9e4066Sahrens 2781cdb0ab79Smaybee /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */ 27825730cc9aSmaybee if (mask & AT_SIZE) 2783fa9e4066Sahrens zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx); 27845730cc9aSmaybee else if (mask != 0) 2785fa9e4066Sahrens zfs_time_stamper_locked(zp, STATE_CHANGED, tx); 2786da6c28aaSamw /* 2787da6c28aaSamw * Do this after setting timestamps to prevent timestamp 2788da6c28aaSamw * update from toggling bit 2789da6c28aaSamw */ 2790da6c28aaSamw 2791da6c28aaSamw if (xoap && (mask & AT_XVATTR)) { 2792ae4caef8SMark Shellenbaum 2793ae4caef8SMark Shellenbaum /* 2794ae4caef8SMark Shellenbaum * restore trimmed off masks 2795ae4caef8SMark Shellenbaum * so that return masks can be set for caller. 2796ae4caef8SMark Shellenbaum */ 2797ae4caef8SMark Shellenbaum 2798ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) { 2799ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_APPENDONLY); 2800ae4caef8SMark Shellenbaum } 2801ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) { 2802ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_NOUNLINK); 2803ae4caef8SMark Shellenbaum } 2804ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) { 2805ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_IMMUTABLE); 2806ae4caef8SMark Shellenbaum } 2807ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) { 2808ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_NODUMP); 2809ae4caef8SMark Shellenbaum } 2810ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) { 2811ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_AV_MODIFIED); 2812ae4caef8SMark Shellenbaum } 2813ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) { 2814ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_AV_QUARANTINED); 2815ae4caef8SMark Shellenbaum } 2816ae4caef8SMark Shellenbaum 2817da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { 2818da6c28aaSamw size_t len; 2819da6c28aaSamw dmu_object_info_t doi; 2820da6c28aaSamw 2821da6c28aaSamw ASSERT(vp->v_type == VREG); 2822da6c28aaSamw 2823da6c28aaSamw /* Grow the bonus buffer if necessary. */ 2824da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2825da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2826da6c28aaSamw sizeof (znode_phys_t); 2827da6c28aaSamw if (len > doi.doi_bonus_size) 2828da6c28aaSamw VERIFY(dmu_set_bonus(zp->z_dbuf, len, tx) == 0); 2829da6c28aaSamw } 2830da6c28aaSamw zfs_xvattr_set(zp, xvap); 2831da6c28aaSamw } 2832fa9e4066Sahrens 283389459e17SMark Shellenbaum if (fuid_dirtied) 283489459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 283589459e17SMark Shellenbaum 28365730cc9aSmaybee if (mask != 0) 2837da6c28aaSamw zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp); 2838fa9e4066Sahrens 2839fa9e4066Sahrens mutex_exit(&zp->z_lock); 2840fa9e4066Sahrens 284114843421SMatthew Ahrens out: 2842d2443e76Smarks if (attrzp) 2843d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2844d2443e76Smarks 284514843421SMatthew Ahrens if (aclp) { 284614843421SMatthew Ahrens zfs_acl_free(aclp); 284714843421SMatthew Ahrens aclp = NULL; 284814843421SMatthew Ahrens } 284914843421SMatthew Ahrens 285014843421SMatthew Ahrens if (fuidp) { 285114843421SMatthew Ahrens zfs_fuid_info_free(fuidp); 285214843421SMatthew Ahrens fuidp = NULL; 285314843421SMatthew Ahrens } 285414843421SMatthew Ahrens 285514843421SMatthew Ahrens if (err) 285614843421SMatthew Ahrens dmu_tx_abort(tx); 285714843421SMatthew Ahrens else 285814843421SMatthew Ahrens dmu_tx_commit(tx); 285914843421SMatthew Ahrens 286014843421SMatthew Ahrens if (err == ERESTART) 286114843421SMatthew Ahrens goto top; 2862fa9e4066Sahrens 2863fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2864fa9e4066Sahrens return (err); 2865fa9e4066Sahrens } 2866fa9e4066Sahrens 2867fa9e4066Sahrens typedef struct zfs_zlock { 2868fa9e4066Sahrens krwlock_t *zl_rwlock; /* lock we acquired */ 2869fa9e4066Sahrens znode_t *zl_znode; /* znode we held */ 2870fa9e4066Sahrens struct zfs_zlock *zl_next; /* next in list */ 2871fa9e4066Sahrens } zfs_zlock_t; 2872fa9e4066Sahrens 2873ff008e00Smaybee /* 2874ff008e00Smaybee * Drop locks and release vnodes that were held by zfs_rename_lock(). 2875ff008e00Smaybee */ 2876ff008e00Smaybee static void 2877ff008e00Smaybee zfs_rename_unlock(zfs_zlock_t **zlpp) 2878ff008e00Smaybee { 2879ff008e00Smaybee zfs_zlock_t *zl; 2880ff008e00Smaybee 2881ff008e00Smaybee while ((zl = *zlpp) != NULL) { 2882ff008e00Smaybee if (zl->zl_znode != NULL) 2883ff008e00Smaybee VN_RELE(ZTOV(zl->zl_znode)); 2884ff008e00Smaybee rw_exit(zl->zl_rwlock); 2885ff008e00Smaybee *zlpp = zl->zl_next; 2886ff008e00Smaybee kmem_free(zl, sizeof (*zl)); 2887ff008e00Smaybee } 2888ff008e00Smaybee } 2889ff008e00Smaybee 2890ff008e00Smaybee /* 2891ff008e00Smaybee * Search back through the directory tree, using the ".." entries. 2892ff008e00Smaybee * Lock each directory in the chain to prevent concurrent renames. 2893ff008e00Smaybee * Fail any attempt to move a directory into one of its own descendants. 2894ff008e00Smaybee * XXX - z_parent_lock can overlap with map or grow locks 2895ff008e00Smaybee */ 2896fa9e4066Sahrens static int 2897fa9e4066Sahrens zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 2898fa9e4066Sahrens { 2899fa9e4066Sahrens zfs_zlock_t *zl; 2900feb08c6bSbillm znode_t *zp = tdzp; 2901fa9e4066Sahrens uint64_t rootid = zp->z_zfsvfs->z_root; 2902fa9e4066Sahrens uint64_t *oidp = &zp->z_id; 2903fa9e4066Sahrens krwlock_t *rwlp = &szp->z_parent_lock; 2904fa9e4066Sahrens krw_t rw = RW_WRITER; 2905fa9e4066Sahrens 2906fa9e4066Sahrens /* 2907fa9e4066Sahrens * First pass write-locks szp and compares to zp->z_id. 2908fa9e4066Sahrens * Later passes read-lock zp and compare to zp->z_parent. 2909fa9e4066Sahrens */ 2910fa9e4066Sahrens do { 2911ff008e00Smaybee if (!rw_tryenter(rwlp, rw)) { 2912ff008e00Smaybee /* 2913ff008e00Smaybee * Another thread is renaming in this path. 2914ff008e00Smaybee * Note that if we are a WRITER, we don't have any 2915ff008e00Smaybee * parent_locks held yet. 2916ff008e00Smaybee */ 2917ff008e00Smaybee if (rw == RW_READER && zp->z_id > szp->z_id) { 2918ff008e00Smaybee /* 2919ff008e00Smaybee * Drop our locks and restart 2920ff008e00Smaybee */ 2921ff008e00Smaybee zfs_rename_unlock(&zl); 2922ff008e00Smaybee *zlpp = NULL; 2923ff008e00Smaybee zp = tdzp; 2924ff008e00Smaybee oidp = &zp->z_id; 2925ff008e00Smaybee rwlp = &szp->z_parent_lock; 2926ff008e00Smaybee rw = RW_WRITER; 2927ff008e00Smaybee continue; 2928ff008e00Smaybee } else { 2929ff008e00Smaybee /* 2930ff008e00Smaybee * Wait for other thread to drop its locks 2931ff008e00Smaybee */ 2932ff008e00Smaybee rw_enter(rwlp, rw); 2933ff008e00Smaybee } 2934ff008e00Smaybee } 2935ff008e00Smaybee 2936fa9e4066Sahrens zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 2937fa9e4066Sahrens zl->zl_rwlock = rwlp; 2938fa9e4066Sahrens zl->zl_znode = NULL; 2939fa9e4066Sahrens zl->zl_next = *zlpp; 2940fa9e4066Sahrens *zlpp = zl; 2941fa9e4066Sahrens 2942fa9e4066Sahrens if (*oidp == szp->z_id) /* We're a descendant of szp */ 2943fa9e4066Sahrens return (EINVAL); 2944fa9e4066Sahrens 2945fa9e4066Sahrens if (*oidp == rootid) /* We've hit the top */ 2946fa9e4066Sahrens return (0); 2947fa9e4066Sahrens 2948fa9e4066Sahrens if (rw == RW_READER) { /* i.e. not the first pass */ 2949fa9e4066Sahrens int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp); 2950fa9e4066Sahrens if (error) 2951fa9e4066Sahrens return (error); 2952fa9e4066Sahrens zl->zl_znode = zp; 2953fa9e4066Sahrens } 2954fa9e4066Sahrens oidp = &zp->z_phys->zp_parent; 2955fa9e4066Sahrens rwlp = &zp->z_parent_lock; 2956fa9e4066Sahrens rw = RW_READER; 2957fa9e4066Sahrens 2958fa9e4066Sahrens } while (zp->z_id != sdzp->z_id); 2959fa9e4066Sahrens 2960fa9e4066Sahrens return (0); 2961fa9e4066Sahrens } 2962fa9e4066Sahrens 2963fa9e4066Sahrens /* 2964fa9e4066Sahrens * Move an entry from the provided source directory to the target 2965fa9e4066Sahrens * directory. Change the entry name as indicated. 2966fa9e4066Sahrens * 2967fa9e4066Sahrens * IN: sdvp - Source directory containing the "old entry". 2968fa9e4066Sahrens * snm - Old entry name. 2969fa9e4066Sahrens * tdvp - Target directory to contain the "new entry". 2970fa9e4066Sahrens * tnm - New entry name. 2971fa9e4066Sahrens * cr - credentials of caller. 2972da6c28aaSamw * ct - caller context 2973da6c28aaSamw * flags - case flags 2974fa9e4066Sahrens * 2975fa9e4066Sahrens * RETURN: 0 if success 2976fa9e4066Sahrens * error code if failure 2977fa9e4066Sahrens * 2978fa9e4066Sahrens * Timestamps: 2979fa9e4066Sahrens * sdvp,tdvp - ctime|mtime updated 2980fa9e4066Sahrens */ 2981da6c28aaSamw /*ARGSUSED*/ 2982fa9e4066Sahrens static int 2983da6c28aaSamw zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr, 2984da6c28aaSamw caller_context_t *ct, int flags) 2985fa9e4066Sahrens { 2986fa9e4066Sahrens znode_t *tdzp, *szp, *tzp; 2987fa9e4066Sahrens znode_t *sdzp = VTOZ(sdvp); 2988fa9e4066Sahrens zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 2989f18faf3fSek zilog_t *zilog; 2990fa9e4066Sahrens vnode_t *realvp; 2991fa9e4066Sahrens zfs_dirlock_t *sdl, *tdl; 2992fa9e4066Sahrens dmu_tx_t *tx; 2993fa9e4066Sahrens zfs_zlock_t *zl; 2994da6c28aaSamw int cmp, serr, terr; 2995da6c28aaSamw int error = 0; 2996da6c28aaSamw int zflg = 0; 2997fa9e4066Sahrens 29983cb34c60Sahrens ZFS_ENTER(zfsvfs); 29993cb34c60Sahrens ZFS_VERIFY_ZP(sdzp); 3000f18faf3fSek zilog = zfsvfs->z_log; 3001fa9e4066Sahrens 3002fa9e4066Sahrens /* 3003fa9e4066Sahrens * Make sure we have the real vp for the target directory. 3004fa9e4066Sahrens */ 3005da6c28aaSamw if (VOP_REALVP(tdvp, &realvp, ct) == 0) 3006fa9e4066Sahrens tdvp = realvp; 3007fa9e4066Sahrens 3008fa9e4066Sahrens if (tdvp->v_vfsp != sdvp->v_vfsp) { 3009fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3010fa9e4066Sahrens return (EXDEV); 3011fa9e4066Sahrens } 3012fa9e4066Sahrens 3013fa9e4066Sahrens tdzp = VTOZ(tdvp); 30143cb34c60Sahrens ZFS_VERIFY_ZP(tdzp); 3015de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(tnm, 3016da6c28aaSamw strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3017da6c28aaSamw ZFS_EXIT(zfsvfs); 3018da6c28aaSamw return (EILSEQ); 3019da6c28aaSamw } 3020da6c28aaSamw 3021da6c28aaSamw if (flags & FIGNORECASE) 3022da6c28aaSamw zflg |= ZCILOOK; 3023da6c28aaSamw 3024fa9e4066Sahrens top: 3025fa9e4066Sahrens szp = NULL; 3026fa9e4066Sahrens tzp = NULL; 3027fa9e4066Sahrens zl = NULL; 3028fa9e4066Sahrens 3029fa9e4066Sahrens /* 3030fa9e4066Sahrens * This is to prevent the creation of links into attribute space 3031fa9e4066Sahrens * by renaming a linked file into/outof an attribute directory. 3032fa9e4066Sahrens * See the comment in zfs_link() for why this is considered bad. 3033fa9e4066Sahrens */ 3034fa9e4066Sahrens if ((tdzp->z_phys->zp_flags & ZFS_XATTR) != 3035fa9e4066Sahrens (sdzp->z_phys->zp_flags & ZFS_XATTR)) { 3036fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3037fa9e4066Sahrens return (EINVAL); 3038fa9e4066Sahrens } 3039fa9e4066Sahrens 3040fa9e4066Sahrens /* 3041fa9e4066Sahrens * Lock source and target directory entries. To prevent deadlock, 3042fa9e4066Sahrens * a lock ordering must be defined. We lock the directory with 3043fa9e4066Sahrens * the smallest object id first, or if it's a tie, the one with 3044fa9e4066Sahrens * the lexically first name. 3045fa9e4066Sahrens */ 3046fa9e4066Sahrens if (sdzp->z_id < tdzp->z_id) { 3047fa9e4066Sahrens cmp = -1; 3048fa9e4066Sahrens } else if (sdzp->z_id > tdzp->z_id) { 3049fa9e4066Sahrens cmp = 1; 3050fa9e4066Sahrens } else { 3051da6c28aaSamw /* 3052da6c28aaSamw * First compare the two name arguments without 3053da6c28aaSamw * considering any case folding. 3054da6c28aaSamw */ 3055da6c28aaSamw int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER); 3056da6c28aaSamw 3057da6c28aaSamw cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error); 3058de8267e0Stimh ASSERT(error == 0 || !zfsvfs->z_utf8); 3059fa9e4066Sahrens if (cmp == 0) { 3060fa9e4066Sahrens /* 3061fa9e4066Sahrens * POSIX: "If the old argument and the new argument 3062fa9e4066Sahrens * both refer to links to the same existing file, 3063fa9e4066Sahrens * the rename() function shall return successfully 3064fa9e4066Sahrens * and perform no other action." 3065fa9e4066Sahrens */ 3066fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3067fa9e4066Sahrens return (0); 3068fa9e4066Sahrens } 3069da6c28aaSamw /* 3070da6c28aaSamw * If the file system is case-folding, then we may 3071da6c28aaSamw * have some more checking to do. A case-folding file 3072da6c28aaSamw * system is either supporting mixed case sensitivity 3073da6c28aaSamw * access or is completely case-insensitive. Note 3074da6c28aaSamw * that the file system is always case preserving. 3075da6c28aaSamw * 3076da6c28aaSamw * In mixed sensitivity mode case sensitive behavior 3077da6c28aaSamw * is the default. FIGNORECASE must be used to 3078da6c28aaSamw * explicitly request case insensitive behavior. 3079da6c28aaSamw * 3080da6c28aaSamw * If the source and target names provided differ only 3081da6c28aaSamw * by case (e.g., a request to rename 'tim' to 'Tim'), 3082da6c28aaSamw * we will treat this as a special case in the 3083da6c28aaSamw * case-insensitive mode: as long as the source name 3084da6c28aaSamw * is an exact match, we will allow this to proceed as 3085da6c28aaSamw * a name-change request. 3086da6c28aaSamw */ 3087de8267e0Stimh if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 3088de8267e0Stimh (zfsvfs->z_case == ZFS_CASE_MIXED && 3089de8267e0Stimh flags & FIGNORECASE)) && 3090da6c28aaSamw u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST, 3091da6c28aaSamw &error) == 0) { 3092da6c28aaSamw /* 3093da6c28aaSamw * case preserving rename request, require exact 3094da6c28aaSamw * name matches 3095da6c28aaSamw */ 3096da6c28aaSamw zflg |= ZCIEXACT; 3097da6c28aaSamw zflg &= ~ZCILOOK; 3098da6c28aaSamw } 3099fa9e4066Sahrens } 3100da6c28aaSamw 3101fa9e4066Sahrens if (cmp < 0) { 3102da6c28aaSamw serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, 3103da6c28aaSamw ZEXISTS | zflg, NULL, NULL); 3104da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3105da6c28aaSamw tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL); 3106fa9e4066Sahrens } else { 3107da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3108da6c28aaSamw tdzp, tnm, &tzp, zflg, NULL, NULL); 3109da6c28aaSamw serr = zfs_dirent_lock(&sdl, 3110da6c28aaSamw sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg, 3111da6c28aaSamw NULL, NULL); 3112fa9e4066Sahrens } 3113fa9e4066Sahrens 3114fa9e4066Sahrens if (serr) { 3115fa9e4066Sahrens /* 3116fa9e4066Sahrens * Source entry invalid or not there. 3117fa9e4066Sahrens */ 3118fa9e4066Sahrens if (!terr) { 3119fa9e4066Sahrens zfs_dirent_unlock(tdl); 3120fa9e4066Sahrens if (tzp) 3121fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3122fa9e4066Sahrens } 3123fa9e4066Sahrens if (strcmp(snm, "..") == 0) 3124fa9e4066Sahrens serr = EINVAL; 3125fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3126fa9e4066Sahrens return (serr); 3127fa9e4066Sahrens } 3128fa9e4066Sahrens if (terr) { 3129fa9e4066Sahrens zfs_dirent_unlock(sdl); 3130fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3131fa9e4066Sahrens if (strcmp(tnm, "..") == 0) 3132fa9e4066Sahrens terr = EINVAL; 3133fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3134fa9e4066Sahrens return (terr); 3135fa9e4066Sahrens } 3136fa9e4066Sahrens 3137fa9e4066Sahrens /* 3138fa9e4066Sahrens * Must have write access at the source to remove the old entry 3139fa9e4066Sahrens * and write access at the target to create the new entry. 3140fa9e4066Sahrens * Note that if target and source are the same, this can be 3141fa9e4066Sahrens * done in a single check. 3142fa9e4066Sahrens */ 3143fa9e4066Sahrens 3144fa9e4066Sahrens if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 3145fa9e4066Sahrens goto out; 3146fa9e4066Sahrens 3147fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3148fa9e4066Sahrens /* 3149fa9e4066Sahrens * Check to make sure rename is valid. 3150fa9e4066Sahrens * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 3151fa9e4066Sahrens */ 3152fa9e4066Sahrens if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 3153fa9e4066Sahrens goto out; 3154fa9e4066Sahrens } 3155fa9e4066Sahrens 3156fa9e4066Sahrens /* 3157fa9e4066Sahrens * Does target exist? 3158fa9e4066Sahrens */ 3159fa9e4066Sahrens if (tzp) { 3160fa9e4066Sahrens /* 3161fa9e4066Sahrens * Source and target must be the same type. 3162fa9e4066Sahrens */ 3163fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3164fa9e4066Sahrens if (ZTOV(tzp)->v_type != VDIR) { 3165fa9e4066Sahrens error = ENOTDIR; 3166fa9e4066Sahrens goto out; 3167fa9e4066Sahrens } 3168fa9e4066Sahrens } else { 3169fa9e4066Sahrens if (ZTOV(tzp)->v_type == VDIR) { 3170fa9e4066Sahrens error = EISDIR; 3171fa9e4066Sahrens goto out; 3172fa9e4066Sahrens } 3173fa9e4066Sahrens } 3174fa9e4066Sahrens /* 3175fa9e4066Sahrens * POSIX dictates that when the source and target 3176fa9e4066Sahrens * entries refer to the same file object, rename 3177fa9e4066Sahrens * must do nothing and exit without error. 3178fa9e4066Sahrens */ 3179fa9e4066Sahrens if (szp->z_id == tzp->z_id) { 3180fa9e4066Sahrens error = 0; 3181fa9e4066Sahrens goto out; 3182fa9e4066Sahrens } 3183fa9e4066Sahrens } 3184fa9e4066Sahrens 3185da6c28aaSamw vnevent_rename_src(ZTOV(szp), sdvp, snm, ct); 3186fa9e4066Sahrens if (tzp) 3187da6c28aaSamw vnevent_rename_dest(ZTOV(tzp), tdvp, tnm, ct); 3188df2381bfSpraks 3189df2381bfSpraks /* 3190df2381bfSpraks * notify the target directory if it is not the same 3191df2381bfSpraks * as source directory. 3192df2381bfSpraks */ 3193df2381bfSpraks if (tdvp != sdvp) { 3194da6c28aaSamw vnevent_rename_dest_dir(tdvp, ct); 3195df2381bfSpraks } 3196fa9e4066Sahrens 3197fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3198fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */ 3199fa9e4066Sahrens dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */ 3200ea8dc4b6Seschrock dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); 3201ea8dc4b6Seschrock dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); 3202ea8dc4b6Seschrock if (sdzp != tdzp) 3203fa9e4066Sahrens dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */ 3204ea8dc4b6Seschrock if (tzp) 3205ea8dc4b6Seschrock dmu_tx_hold_bonus(tx, tzp->z_id); /* parent changes */ 3206893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 32071209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 3208fa9e4066Sahrens if (error) { 3209fa9e4066Sahrens if (zl != NULL) 3210fa9e4066Sahrens zfs_rename_unlock(&zl); 3211fa9e4066Sahrens zfs_dirent_unlock(sdl); 3212fa9e4066Sahrens zfs_dirent_unlock(tdl); 3213fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3214fa9e4066Sahrens if (tzp) 3215fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 32161209a471SNeil Perrin if (error == ERESTART) { 32178a2f1b91Sahrens dmu_tx_wait(tx); 32188a2f1b91Sahrens dmu_tx_abort(tx); 3219fa9e4066Sahrens goto top; 3220fa9e4066Sahrens } 32218a2f1b91Sahrens dmu_tx_abort(tx); 3222fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3223fa9e4066Sahrens return (error); 3224fa9e4066Sahrens } 3225fa9e4066Sahrens 3226fa9e4066Sahrens if (tzp) /* Attempt to remove the existing target */ 3227da6c28aaSamw error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL); 3228fa9e4066Sahrens 3229fa9e4066Sahrens if (error == 0) { 3230fa9e4066Sahrens error = zfs_link_create(tdl, szp, tx, ZRENAMING); 3231fa9e4066Sahrens if (error == 0) { 3232da6c28aaSamw szp->z_phys->zp_flags |= ZFS_AV_MODIFIED; 3233da6c28aaSamw 3234fa9e4066Sahrens error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 3235fa9e4066Sahrens ASSERT(error == 0); 3236da6c28aaSamw 3237da6c28aaSamw zfs_log_rename(zilog, tx, 3238da6c28aaSamw TX_RENAME | (flags & FIGNORECASE ? TX_CI : 0), 3239da6c28aaSamw sdzp, sdl->dl_name, tdzp, tdl->dl_name, szp); 324051ece835Seschrock 324151ece835Seschrock /* Update path information for the target vnode */ 324251ece835Seschrock vn_renamepath(tdvp, ZTOV(szp), tnm, strlen(tnm)); 3243fa9e4066Sahrens } 3244fa9e4066Sahrens } 3245fa9e4066Sahrens 3246fa9e4066Sahrens dmu_tx_commit(tx); 3247fa9e4066Sahrens out: 3248fa9e4066Sahrens if (zl != NULL) 3249fa9e4066Sahrens zfs_rename_unlock(&zl); 3250fa9e4066Sahrens 3251fa9e4066Sahrens zfs_dirent_unlock(sdl); 3252fa9e4066Sahrens zfs_dirent_unlock(tdl); 3253fa9e4066Sahrens 3254fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3255fa9e4066Sahrens if (tzp) 3256fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3257fa9e4066Sahrens 3258fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3259fa9e4066Sahrens return (error); 3260fa9e4066Sahrens } 3261fa9e4066Sahrens 3262fa9e4066Sahrens /* 3263fa9e4066Sahrens * Insert the indicated symbolic reference entry into the directory. 3264fa9e4066Sahrens * 3265fa9e4066Sahrens * IN: dvp - Directory to contain new symbolic link. 3266fa9e4066Sahrens * link - Name for new symlink entry. 3267fa9e4066Sahrens * vap - Attributes of new entry. 3268fa9e4066Sahrens * target - Target path of new symlink. 3269fa9e4066Sahrens * cr - credentials of caller. 3270da6c28aaSamw * ct - caller context 3271da6c28aaSamw * flags - case flags 3272fa9e4066Sahrens * 3273fa9e4066Sahrens * RETURN: 0 if success 3274fa9e4066Sahrens * error code if failure 3275fa9e4066Sahrens * 3276fa9e4066Sahrens * Timestamps: 3277fa9e4066Sahrens * dvp - ctime|mtime updated 3278fa9e4066Sahrens */ 3279da6c28aaSamw /*ARGSUSED*/ 3280fa9e4066Sahrens static int 3281da6c28aaSamw zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr, 3282da6c28aaSamw caller_context_t *ct, int flags) 3283fa9e4066Sahrens { 3284fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 3285fa9e4066Sahrens zfs_dirlock_t *dl; 3286fa9e4066Sahrens dmu_tx_t *tx; 3287fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3288f18faf3fSek zilog_t *zilog; 3289fa9e4066Sahrens int len = strlen(link); 3290fa9e4066Sahrens int error; 3291da6c28aaSamw int zflg = ZNEW; 329289459e17SMark Shellenbaum zfs_acl_ids_t acl_ids; 329389459e17SMark Shellenbaum boolean_t fuid_dirtied; 3294fa9e4066Sahrens 3295fa9e4066Sahrens ASSERT(vap->va_type == VLNK); 3296fa9e4066Sahrens 32973cb34c60Sahrens ZFS_ENTER(zfsvfs); 32983cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3299f18faf3fSek zilog = zfsvfs->z_log; 3300da6c28aaSamw 3301de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 3302da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3303da6c28aaSamw ZFS_EXIT(zfsvfs); 3304da6c28aaSamw return (EILSEQ); 3305da6c28aaSamw } 3306da6c28aaSamw if (flags & FIGNORECASE) 3307da6c28aaSamw zflg |= ZCILOOK; 3308fa9e4066Sahrens top: 3309da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3310fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3311fa9e4066Sahrens return (error); 3312fa9e4066Sahrens } 3313fa9e4066Sahrens 3314fa9e4066Sahrens if (len > MAXPATHLEN) { 3315fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3316fa9e4066Sahrens return (ENAMETOOLONG); 3317fa9e4066Sahrens } 3318fa9e4066Sahrens 3319fa9e4066Sahrens /* 3320fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3321fa9e4066Sahrens */ 3322da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL); 3323da6c28aaSamw if (error) { 3324fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3325fa9e4066Sahrens return (error); 3326fa9e4066Sahrens } 3327fa9e4066Sahrens 332889459e17SMark Shellenbaum VERIFY(0 == zfs_acl_ids_create(dzp, 0, vap, cr, NULL, &acl_ids)); 332914843421SMatthew Ahrens if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 333014843421SMatthew Ahrens zfs_acl_ids_free(&acl_ids); 333114843421SMatthew Ahrens zfs_dirent_unlock(dl); 333214843421SMatthew Ahrens ZFS_EXIT(zfsvfs); 333314843421SMatthew Ahrens return (EDQUOT); 333414843421SMatthew Ahrens } 3335fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 333689459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 3337fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 3338fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 3339ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 334089459e17SMark Shellenbaum if (acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) 3341fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE); 334214843421SMatthew Ahrens if (fuid_dirtied) 334314843421SMatthew Ahrens zfs_fuid_txhold(zfsvfs, tx); 33441209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 3345fa9e4066Sahrens if (error) { 334689459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 3347fa9e4066Sahrens zfs_dirent_unlock(dl); 33481209a471SNeil Perrin if (error == ERESTART) { 33498a2f1b91Sahrens dmu_tx_wait(tx); 33508a2f1b91Sahrens dmu_tx_abort(tx); 3351fa9e4066Sahrens goto top; 3352fa9e4066Sahrens } 33538a2f1b91Sahrens dmu_tx_abort(tx); 3354fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3355fa9e4066Sahrens return (error); 3356fa9e4066Sahrens } 3357fa9e4066Sahrens 3358fa9e4066Sahrens dmu_buf_will_dirty(dzp->z_dbuf, tx); 3359fa9e4066Sahrens 3360fa9e4066Sahrens /* 3361fa9e4066Sahrens * Create a new object for the symlink. 3362fa9e4066Sahrens * Put the link content into bonus buffer if it will fit; 3363fa9e4066Sahrens * otherwise, store it just like any other file data. 3364fa9e4066Sahrens */ 3365fa9e4066Sahrens if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) { 336689459e17SMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, len, &acl_ids); 3367fa9e4066Sahrens if (len != 0) 3368fa9e4066Sahrens bcopy(link, zp->z_phys + 1, len); 3369fa9e4066Sahrens } else { 3370fa9e4066Sahrens dmu_buf_t *dbp; 3371104e2ed7Sperrin 337289459e17SMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, &acl_ids); 337389459e17SMark Shellenbaum 337489459e17SMark Shellenbaum if (fuid_dirtied) 337589459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 3376104e2ed7Sperrin /* 3377104e2ed7Sperrin * Nothing can access the znode yet so no locking needed 3378104e2ed7Sperrin * for growing the znode's blocksize. 3379104e2ed7Sperrin */ 3380104e2ed7Sperrin zfs_grow_blocksize(zp, len, tx); 3381fa9e4066Sahrens 33824ccbb6e7Sahrens VERIFY(0 == dmu_buf_hold(zfsvfs->z_os, 33834ccbb6e7Sahrens zp->z_id, 0, FTAG, &dbp)); 3384fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 3385fa9e4066Sahrens 3386fa9e4066Sahrens ASSERT3U(len, <=, dbp->db_size); 3387fa9e4066Sahrens bcopy(link, dbp->db_data, len); 3388ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3389fa9e4066Sahrens } 3390fa9e4066Sahrens zp->z_phys->zp_size = len; 3391fa9e4066Sahrens 3392fa9e4066Sahrens /* 3393fa9e4066Sahrens * Insert the new object into the directory. 3394fa9e4066Sahrens */ 3395fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 3396da6c28aaSamw if (error == 0) { 3397da6c28aaSamw uint64_t txtype = TX_SYMLINK; 3398da6c28aaSamw if (flags & FIGNORECASE) 3399da6c28aaSamw txtype |= TX_CI; 3400da6c28aaSamw zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link); 3401da6c28aaSamw } 340289459e17SMark Shellenbaum 340389459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 3404fa9e4066Sahrens 3405fa9e4066Sahrens dmu_tx_commit(tx); 3406fa9e4066Sahrens 3407fa9e4066Sahrens zfs_dirent_unlock(dl); 3408fa9e4066Sahrens 3409fa9e4066Sahrens VN_RELE(ZTOV(zp)); 3410fa9e4066Sahrens 3411fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3412fa9e4066Sahrens return (error); 3413fa9e4066Sahrens } 3414fa9e4066Sahrens 3415fa9e4066Sahrens /* 3416fa9e4066Sahrens * Return, in the buffer contained in the provided uio structure, 3417fa9e4066Sahrens * the symbolic path referred to by vp. 3418fa9e4066Sahrens * 3419fa9e4066Sahrens * IN: vp - vnode of symbolic link. 3420fa9e4066Sahrens * uoip - structure to contain the link path. 3421fa9e4066Sahrens * cr - credentials of caller. 3422da6c28aaSamw * ct - caller context 3423fa9e4066Sahrens * 3424fa9e4066Sahrens * OUT: uio - structure to contain the link path. 3425fa9e4066Sahrens * 3426fa9e4066Sahrens * RETURN: 0 if success 3427fa9e4066Sahrens * error code if failure 3428fa9e4066Sahrens * 3429fa9e4066Sahrens * Timestamps: 3430fa9e4066Sahrens * vp - atime updated 3431fa9e4066Sahrens */ 3432fa9e4066Sahrens /* ARGSUSED */ 3433fa9e4066Sahrens static int 3434da6c28aaSamw zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct) 3435fa9e4066Sahrens { 3436fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3437fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3438fa9e4066Sahrens size_t bufsz; 3439fa9e4066Sahrens int error; 3440fa9e4066Sahrens 34413cb34c60Sahrens ZFS_ENTER(zfsvfs); 34423cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3443fa9e4066Sahrens 3444fa9e4066Sahrens bufsz = (size_t)zp->z_phys->zp_size; 3445fa9e4066Sahrens if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) { 3446fa9e4066Sahrens error = uiomove(zp->z_phys + 1, 3447fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3448fa9e4066Sahrens } else { 3449ea8dc4b6Seschrock dmu_buf_t *dbp; 3450ea8dc4b6Seschrock error = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0, FTAG, &dbp); 3451ea8dc4b6Seschrock if (error) { 3452fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3453fa9e4066Sahrens return (error); 3454fa9e4066Sahrens } 3455fa9e4066Sahrens error = uiomove(dbp->db_data, 3456fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3457ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3458fa9e4066Sahrens } 3459fa9e4066Sahrens 3460fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 3461fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3462fa9e4066Sahrens return (error); 3463fa9e4066Sahrens } 3464fa9e4066Sahrens 3465fa9e4066Sahrens /* 3466fa9e4066Sahrens * Insert a new entry into directory tdvp referencing svp. 3467fa9e4066Sahrens * 3468fa9e4066Sahrens * IN: tdvp - Directory to contain new entry. 3469fa9e4066Sahrens * svp - vnode of new entry. 3470fa9e4066Sahrens * name - name of new entry. 3471fa9e4066Sahrens * cr - credentials of caller. 3472da6c28aaSamw * ct - caller context 3473fa9e4066Sahrens * 3474fa9e4066Sahrens * RETURN: 0 if success 3475fa9e4066Sahrens * error code if failure 3476fa9e4066Sahrens * 3477fa9e4066Sahrens * Timestamps: 3478fa9e4066Sahrens * tdvp - ctime|mtime updated 3479fa9e4066Sahrens * svp - ctime updated 3480fa9e4066Sahrens */ 3481fa9e4066Sahrens /* ARGSUSED */ 3482fa9e4066Sahrens static int 3483da6c28aaSamw zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr, 3484da6c28aaSamw caller_context_t *ct, int flags) 3485fa9e4066Sahrens { 3486fa9e4066Sahrens znode_t *dzp = VTOZ(tdvp); 3487fa9e4066Sahrens znode_t *tzp, *szp; 3488fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3489f18faf3fSek zilog_t *zilog; 3490fa9e4066Sahrens zfs_dirlock_t *dl; 3491fa9e4066Sahrens dmu_tx_t *tx; 3492fa9e4066Sahrens vnode_t *realvp; 3493fa9e4066Sahrens int error; 3494da6c28aaSamw int zf = ZNEW; 3495da6c28aaSamw uid_t owner; 3496fa9e4066Sahrens 3497fa9e4066Sahrens ASSERT(tdvp->v_type == VDIR); 3498fa9e4066Sahrens 34993cb34c60Sahrens ZFS_ENTER(zfsvfs); 35003cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3501f18faf3fSek zilog = zfsvfs->z_log; 3502fa9e4066Sahrens 3503da6c28aaSamw if (VOP_REALVP(svp, &realvp, ct) == 0) 3504fa9e4066Sahrens svp = realvp; 3505fa9e4066Sahrens 3506fa9e4066Sahrens if (svp->v_vfsp != tdvp->v_vfsp) { 3507fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3508fa9e4066Sahrens return (EXDEV); 3509fa9e4066Sahrens } 35103cb34c60Sahrens szp = VTOZ(svp); 35113cb34c60Sahrens ZFS_VERIFY_ZP(szp); 3512fa9e4066Sahrens 3513de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, 3514da6c28aaSamw strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3515da6c28aaSamw ZFS_EXIT(zfsvfs); 3516da6c28aaSamw return (EILSEQ); 3517da6c28aaSamw } 3518da6c28aaSamw if (flags & FIGNORECASE) 3519da6c28aaSamw zf |= ZCILOOK; 3520da6c28aaSamw 3521fa9e4066Sahrens top: 3522fa9e4066Sahrens /* 3523fa9e4066Sahrens * We do not support links between attributes and non-attributes 3524fa9e4066Sahrens * because of the potential security risk of creating links 3525fa9e4066Sahrens * into "normal" file space in order to circumvent restrictions 3526fa9e4066Sahrens * imposed in attribute space. 3527fa9e4066Sahrens */ 3528fa9e4066Sahrens if ((szp->z_phys->zp_flags & ZFS_XATTR) != 3529fa9e4066Sahrens (dzp->z_phys->zp_flags & ZFS_XATTR)) { 3530fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3531fa9e4066Sahrens return (EINVAL); 3532fa9e4066Sahrens } 3533fa9e4066Sahrens 3534fa9e4066Sahrens /* 3535fa9e4066Sahrens * POSIX dictates that we return EPERM here. 3536fa9e4066Sahrens * Better choices include ENOTSUP or EISDIR. 3537fa9e4066Sahrens */ 3538fa9e4066Sahrens if (svp->v_type == VDIR) { 3539fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3540fa9e4066Sahrens return (EPERM); 3541fa9e4066Sahrens } 3542fa9e4066Sahrens 3543e0d35c44Smarks owner = zfs_fuid_map_id(zfsvfs, szp->z_phys->zp_uid, cr, ZFS_OWNER); 3544da6c28aaSamw if (owner != crgetuid(cr) && 3545fa9e4066Sahrens secpolicy_basic_link(cr) != 0) { 3546fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3547fa9e4066Sahrens return (EPERM); 3548fa9e4066Sahrens } 3549fa9e4066Sahrens 3550da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3551fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3552fa9e4066Sahrens return (error); 3553fa9e4066Sahrens } 3554fa9e4066Sahrens 3555fa9e4066Sahrens /* 3556fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3557fa9e4066Sahrens */ 3558da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &tzp, zf, NULL, NULL); 3559da6c28aaSamw if (error) { 3560fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3561fa9e4066Sahrens return (error); 3562fa9e4066Sahrens } 3563fa9e4066Sahrens 3564fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3565fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); 3566ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 35671209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 3568fa9e4066Sahrens if (error) { 3569fa9e4066Sahrens zfs_dirent_unlock(dl); 35701209a471SNeil Perrin if (error == ERESTART) { 35718a2f1b91Sahrens dmu_tx_wait(tx); 35728a2f1b91Sahrens dmu_tx_abort(tx); 3573fa9e4066Sahrens goto top; 3574fa9e4066Sahrens } 35758a2f1b91Sahrens dmu_tx_abort(tx); 3576fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3577fa9e4066Sahrens return (error); 3578fa9e4066Sahrens } 3579fa9e4066Sahrens 3580fa9e4066Sahrens error = zfs_link_create(dl, szp, tx, 0); 3581fa9e4066Sahrens 3582da6c28aaSamw if (error == 0) { 3583da6c28aaSamw uint64_t txtype = TX_LINK; 3584da6c28aaSamw if (flags & FIGNORECASE) 3585da6c28aaSamw txtype |= TX_CI; 3586da6c28aaSamw zfs_log_link(zilog, tx, txtype, dzp, szp, name); 3587da6c28aaSamw } 3588fa9e4066Sahrens 3589fa9e4066Sahrens dmu_tx_commit(tx); 3590fa9e4066Sahrens 3591fa9e4066Sahrens zfs_dirent_unlock(dl); 3592fa9e4066Sahrens 3593df2381bfSpraks if (error == 0) { 3594da6c28aaSamw vnevent_link(svp, ct); 3595df2381bfSpraks } 3596df2381bfSpraks 3597fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3598fa9e4066Sahrens return (error); 3599fa9e4066Sahrens } 3600fa9e4066Sahrens 3601fa9e4066Sahrens /* 3602fa9e4066Sahrens * zfs_null_putapage() is used when the file system has been force 3603fa9e4066Sahrens * unmounted. It just drops the pages. 3604fa9e4066Sahrens */ 3605fa9e4066Sahrens /* ARGSUSED */ 3606fa9e4066Sahrens static int 3607fa9e4066Sahrens zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3608fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3609fa9e4066Sahrens { 3610fa9e4066Sahrens pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 3611fa9e4066Sahrens return (0); 3612fa9e4066Sahrens } 3613fa9e4066Sahrens 361444eda4d7Smaybee /* 361544eda4d7Smaybee * Push a page out to disk, klustering if possible. 361644eda4d7Smaybee * 361744eda4d7Smaybee * IN: vp - file to push page to. 361844eda4d7Smaybee * pp - page to push. 361944eda4d7Smaybee * flags - additional flags. 362044eda4d7Smaybee * cr - credentials of caller. 362144eda4d7Smaybee * 362244eda4d7Smaybee * OUT: offp - start of range pushed. 362344eda4d7Smaybee * lenp - len of range pushed. 362444eda4d7Smaybee * 362544eda4d7Smaybee * RETURN: 0 if success 362644eda4d7Smaybee * error code if failure 362744eda4d7Smaybee * 362844eda4d7Smaybee * NOTE: callers must have locked the page to be pushed. On 362944eda4d7Smaybee * exit, the page (and all other pages in the kluster) must be 363044eda4d7Smaybee * unlocked. 363144eda4d7Smaybee */ 3632fa9e4066Sahrens /* ARGSUSED */ 3633fa9e4066Sahrens static int 3634fa9e4066Sahrens zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3635fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3636fa9e4066Sahrens { 3637fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3638fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3639fa9e4066Sahrens dmu_tx_t *tx; 364044eda4d7Smaybee u_offset_t off, koff; 364144eda4d7Smaybee size_t len, klen; 3642f4d2e9e6Smaybee uint64_t filesz; 3643fa9e4066Sahrens int err; 3644fa9e4066Sahrens 3645f4d2e9e6Smaybee filesz = zp->z_phys->zp_size; 3646fa9e4066Sahrens off = pp->p_offset; 364744eda4d7Smaybee len = PAGESIZE; 364844eda4d7Smaybee /* 364944eda4d7Smaybee * If our blocksize is bigger than the page size, try to kluster 36501209a471SNeil Perrin * multiple pages so that we write a full block (thus avoiding 365144eda4d7Smaybee * a read-modify-write). 365244eda4d7Smaybee */ 3653f4d2e9e6Smaybee if (off < filesz && zp->z_blksz > PAGESIZE) { 3654ac05c741SMark Maybee klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 3655ac05c741SMark Maybee koff = ISP2(klen) ? P2ALIGN(off, (u_offset_t)klen) : 0; 365644eda4d7Smaybee ASSERT(koff <= filesz); 365744eda4d7Smaybee if (koff + klen > filesz) 365844eda4d7Smaybee klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE); 365944eda4d7Smaybee pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); 366044eda4d7Smaybee } 366144eda4d7Smaybee ASSERT3U(btop(len), ==, btopr(len)); 3662ac05c741SMark Maybee 3663dd6ef538Smaybee /* 3664dd6ef538Smaybee * Can't push pages past end-of-file. 3665dd6ef538Smaybee */ 3666f4d2e9e6Smaybee if (off >= filesz) { 3667f4d2e9e6Smaybee /* ignore all pages */ 366844eda4d7Smaybee err = 0; 366944eda4d7Smaybee goto out; 3670f4d2e9e6Smaybee } else if (off + len > filesz) { 3671f4d2e9e6Smaybee int npages = btopr(filesz - off); 367244eda4d7Smaybee page_t *trunc; 367344eda4d7Smaybee 367444eda4d7Smaybee page_list_break(&pp, &trunc, npages); 3675f4d2e9e6Smaybee /* ignore pages past end of file */ 367644eda4d7Smaybee if (trunc) 3677f4d2e9e6Smaybee pvn_write_done(trunc, flags); 3678f4d2e9e6Smaybee len = filesz - off; 3679dd6ef538Smaybee } 368014843421SMatthew Ahrens 368114843421SMatthew Ahrens if (zfs_usergroup_overquota(zfsvfs, B_FALSE, zp->z_phys->zp_uid) || 368214843421SMatthew Ahrens zfs_usergroup_overquota(zfsvfs, B_TRUE, zp->z_phys->zp_gid)) { 368314843421SMatthew Ahrens err = EDQUOT; 368414843421SMatthew Ahrens goto out; 368514843421SMatthew Ahrens } 3686ac05c741SMark Maybee top: 3687fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3688fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, off, len); 3689fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 36901209a471SNeil Perrin err = dmu_tx_assign(tx, TXG_NOWAIT); 3691fa9e4066Sahrens if (err != 0) { 36921209a471SNeil Perrin if (err == ERESTART) { 36938a2f1b91Sahrens dmu_tx_wait(tx); 36948a2f1b91Sahrens dmu_tx_abort(tx); 3695fa9e4066Sahrens goto top; 3696fa9e4066Sahrens } 36978a2f1b91Sahrens dmu_tx_abort(tx); 3698fa9e4066Sahrens goto out; 3699fa9e4066Sahrens } 3700fa9e4066Sahrens 370144eda4d7Smaybee if (zp->z_blksz <= PAGESIZE) { 37020fab61baSJonathan W Adams caddr_t va = zfs_map_page(pp, S_READ); 370344eda4d7Smaybee ASSERT3U(len, <=, PAGESIZE); 370444eda4d7Smaybee dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 37050fab61baSJonathan W Adams zfs_unmap_page(pp, va); 370644eda4d7Smaybee } else { 370744eda4d7Smaybee err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 370844eda4d7Smaybee } 3709fa9e4066Sahrens 371044eda4d7Smaybee if (err == 0) { 371144eda4d7Smaybee zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 3712ac05c741SMark Maybee zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, len, 0); 371344eda4d7Smaybee dmu_tx_commit(tx); 371444eda4d7Smaybee } 3715fa9e4066Sahrens 371644eda4d7Smaybee out: 3717f4d2e9e6Smaybee pvn_write_done(pp, (err ? B_ERROR : 0) | flags); 3718fa9e4066Sahrens if (offp) 3719fa9e4066Sahrens *offp = off; 3720fa9e4066Sahrens if (lenp) 3721fa9e4066Sahrens *lenp = len; 3722fa9e4066Sahrens 3723fa9e4066Sahrens return (err); 3724fa9e4066Sahrens } 3725fa9e4066Sahrens 3726fa9e4066Sahrens /* 3727fa9e4066Sahrens * Copy the portion of the file indicated from pages into the file. 3728fa9e4066Sahrens * The pages are stored in a page list attached to the files vnode. 3729fa9e4066Sahrens * 3730fa9e4066Sahrens * IN: vp - vnode of file to push page data to. 3731fa9e4066Sahrens * off - position in file to put data. 3732fa9e4066Sahrens * len - amount of data to write. 3733fa9e4066Sahrens * flags - flags to control the operation. 3734fa9e4066Sahrens * cr - credentials of caller. 3735da6c28aaSamw * ct - caller context. 3736fa9e4066Sahrens * 3737fa9e4066Sahrens * RETURN: 0 if success 3738fa9e4066Sahrens * error code if failure 3739fa9e4066Sahrens * 3740fa9e4066Sahrens * Timestamps: 3741fa9e4066Sahrens * vp - ctime|mtime updated 3742fa9e4066Sahrens */ 3743da6c28aaSamw /*ARGSUSED*/ 3744fa9e4066Sahrens static int 3745da6c28aaSamw zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr, 3746da6c28aaSamw caller_context_t *ct) 3747fa9e4066Sahrens { 3748fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3749fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3750fa9e4066Sahrens page_t *pp; 3751fa9e4066Sahrens size_t io_len; 3752fa9e4066Sahrens u_offset_t io_off; 3753ac05c741SMark Maybee uint_t blksz; 3754ac05c741SMark Maybee rl_t *rl; 3755fa9e4066Sahrens int error = 0; 3756fa9e4066Sahrens 37573cb34c60Sahrens ZFS_ENTER(zfsvfs); 37583cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3759fa9e4066Sahrens 3760ac05c741SMark Maybee /* 3761ac05c741SMark Maybee * Align this request to the file block size in case we kluster. 3762ac05c741SMark Maybee * XXX - this can result in pretty aggresive locking, which can 3763ac05c741SMark Maybee * impact simultanious read/write access. One option might be 3764ac05c741SMark Maybee * to break up long requests (len == 0) into block-by-block 3765ac05c741SMark Maybee * operations to get narrower locking. 3766ac05c741SMark Maybee */ 3767ac05c741SMark Maybee blksz = zp->z_blksz; 3768ac05c741SMark Maybee if (ISP2(blksz)) 3769ac05c741SMark Maybee io_off = P2ALIGN_TYPED(off, blksz, u_offset_t); 3770ac05c741SMark Maybee else 3771ac05c741SMark Maybee io_off = 0; 3772ac05c741SMark Maybee if (len > 0 && ISP2(blksz)) 37735a6f5619SMark Maybee io_len = P2ROUNDUP_TYPED(len + (off - io_off), blksz, size_t); 3774ac05c741SMark Maybee else 3775ac05c741SMark Maybee io_len = 0; 3776ac05c741SMark Maybee 3777ac05c741SMark Maybee if (io_len == 0) { 3778fa9e4066Sahrens /* 3779ac05c741SMark Maybee * Search the entire vp list for pages >= io_off. 3780fa9e4066Sahrens */ 3781ac05c741SMark Maybee rl = zfs_range_lock(zp, io_off, UINT64_MAX, RL_WRITER); 3782ac05c741SMark Maybee error = pvn_vplist_dirty(vp, io_off, zfs_putapage, flags, cr); 3783fe9cf88cSperrin goto out; 3784fa9e4066Sahrens } 3785ac05c741SMark Maybee rl = zfs_range_lock(zp, io_off, io_len, RL_WRITER); 3786fa9e4066Sahrens 3787ac05c741SMark Maybee if (off > zp->z_phys->zp_size) { 3788fa9e4066Sahrens /* past end of file */ 3789ac05c741SMark Maybee zfs_range_unlock(rl); 3790fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3791fa9e4066Sahrens return (0); 3792fa9e4066Sahrens } 3793fa9e4066Sahrens 3794ac05c741SMark Maybee len = MIN(io_len, P2ROUNDUP(zp->z_phys->zp_size, PAGESIZE) - io_off); 3795fa9e4066Sahrens 3796ac05c741SMark Maybee for (off = io_off; io_off < off + len; io_off += io_len) { 3797fa9e4066Sahrens if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 3798104e2ed7Sperrin pp = page_lookup(vp, io_off, 3799ecb72030Sperrin (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); 3800fa9e4066Sahrens } else { 3801fa9e4066Sahrens pp = page_lookup_nowait(vp, io_off, 3802ecb72030Sperrin (flags & B_FREE) ? SE_EXCL : SE_SHARED); 3803fa9e4066Sahrens } 3804fa9e4066Sahrens 3805fa9e4066Sahrens if (pp != NULL && pvn_getdirty(pp, flags)) { 3806fa9e4066Sahrens int err; 3807fa9e4066Sahrens 3808fa9e4066Sahrens /* 3809fa9e4066Sahrens * Found a dirty page to push 3810fa9e4066Sahrens */ 3811104e2ed7Sperrin err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 3812104e2ed7Sperrin if (err) 3813fa9e4066Sahrens error = err; 3814fa9e4066Sahrens } else { 3815fa9e4066Sahrens io_len = PAGESIZE; 3816fa9e4066Sahrens } 3817fa9e4066Sahrens } 3818fe9cf88cSperrin out: 3819ac05c741SMark Maybee zfs_range_unlock(rl); 3820b19a79ecSperrin if ((flags & B_ASYNC) == 0) 3821b19a79ecSperrin zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id); 3822fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3823fa9e4066Sahrens return (error); 3824fa9e4066Sahrens } 3825fa9e4066Sahrens 3826da6c28aaSamw /*ARGSUSED*/ 3827fa9e4066Sahrens void 3828da6c28aaSamw zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 3829fa9e4066Sahrens { 3830fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3831fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3832fa9e4066Sahrens int error; 3833fa9e4066Sahrens 3834f18faf3fSek rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 38354ccbb6e7Sahrens if (zp->z_dbuf == NULL) { 38364ccbb6e7Sahrens /* 3837874395d5Smaybee * The fs has been unmounted, or we did a 3838874395d5Smaybee * suspend/resume and this file no longer exists. 38394ccbb6e7Sahrens */ 3840fa9e4066Sahrens if (vn_has_cached_data(vp)) { 3841fa9e4066Sahrens (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, 3842fa9e4066Sahrens B_INVAL, cr); 3843fa9e4066Sahrens } 3844fa9e4066Sahrens 3845ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 3846fa9e4066Sahrens vp->v_count = 0; /* count arrives as 1 */ 38474ccbb6e7Sahrens mutex_exit(&zp->z_lock); 3848f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 3849874395d5Smaybee zfs_znode_free(zp); 3850fa9e4066Sahrens return; 3851fa9e4066Sahrens } 3852fa9e4066Sahrens 3853fa9e4066Sahrens /* 3854fa9e4066Sahrens * Attempt to push any data in the page cache. If this fails 3855fa9e4066Sahrens * we will get kicked out later in zfs_zinactive(). 3856fa9e4066Sahrens */ 38578afd4dd6Sperrin if (vn_has_cached_data(vp)) { 38588afd4dd6Sperrin (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, 38598afd4dd6Sperrin cr); 38608afd4dd6Sperrin } 3861fa9e4066Sahrens 3862893a6d32Sahrens if (zp->z_atime_dirty && zp->z_unlinked == 0) { 3863fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 3864fa9e4066Sahrens 3865fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3866fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 3867fa9e4066Sahrens if (error) { 3868fa9e4066Sahrens dmu_tx_abort(tx); 3869fa9e4066Sahrens } else { 3870fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 3871fa9e4066Sahrens mutex_enter(&zp->z_lock); 3872fa9e4066Sahrens zp->z_atime_dirty = 0; 3873fa9e4066Sahrens mutex_exit(&zp->z_lock); 3874fa9e4066Sahrens dmu_tx_commit(tx); 3875fa9e4066Sahrens } 3876fa9e4066Sahrens } 3877fa9e4066Sahrens 3878fa9e4066Sahrens zfs_zinactive(zp); 3879f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 3880fa9e4066Sahrens } 3881fa9e4066Sahrens 3882fa9e4066Sahrens /* 3883fa9e4066Sahrens * Bounds-check the seek operation. 3884fa9e4066Sahrens * 3885fa9e4066Sahrens * IN: vp - vnode seeking within 3886fa9e4066Sahrens * ooff - old file offset 3887fa9e4066Sahrens * noffp - pointer to new file offset 3888da6c28aaSamw * ct - caller context 3889fa9e4066Sahrens * 3890fa9e4066Sahrens * RETURN: 0 if success 3891fa9e4066Sahrens * EINVAL if new offset invalid 3892fa9e4066Sahrens */ 3893fa9e4066Sahrens /* ARGSUSED */ 3894fa9e4066Sahrens static int 3895da6c28aaSamw zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, 3896da6c28aaSamw caller_context_t *ct) 3897fa9e4066Sahrens { 3898fa9e4066Sahrens if (vp->v_type == VDIR) 3899fa9e4066Sahrens return (0); 3900fa9e4066Sahrens return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 3901fa9e4066Sahrens } 3902fa9e4066Sahrens 3903fa9e4066Sahrens /* 3904fa9e4066Sahrens * Pre-filter the generic locking function to trap attempts to place 3905fa9e4066Sahrens * a mandatory lock on a memory mapped file. 3906fa9e4066Sahrens */ 3907fa9e4066Sahrens static int 3908fa9e4066Sahrens zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 3909da6c28aaSamw flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct) 3910fa9e4066Sahrens { 3911fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3912fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3913fa9e4066Sahrens int error; 3914fa9e4066Sahrens 39153cb34c60Sahrens ZFS_ENTER(zfsvfs); 39163cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3917fa9e4066Sahrens 3918fa9e4066Sahrens /* 3919ea8dc4b6Seschrock * We are following the UFS semantics with respect to mapcnt 3920ea8dc4b6Seschrock * here: If we see that the file is mapped already, then we will 3921ea8dc4b6Seschrock * return an error, but we don't worry about races between this 3922ea8dc4b6Seschrock * function and zfs_map(). 3923fa9e4066Sahrens */ 3924ea8dc4b6Seschrock if (zp->z_mapcnt > 0 && MANDMODE((mode_t)zp->z_phys->zp_mode)) { 3925fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3926fa9e4066Sahrens return (EAGAIN); 3927fa9e4066Sahrens } 3928da6c28aaSamw error = fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct); 3929fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3930fa9e4066Sahrens return (error); 3931fa9e4066Sahrens } 3932fa9e4066Sahrens 3933fa9e4066Sahrens /* 3934fa9e4066Sahrens * If we can't find a page in the cache, we will create a new page 3935fa9e4066Sahrens * and fill it with file data. For efficiency, we may try to fill 3936ac05c741SMark Maybee * multiple pages at once (klustering) to fill up the supplied page 3937ed886187SMark Maybee * list. Note that the pages to be filled are held with an exclusive 3938ed886187SMark Maybee * lock to prevent access by other threads while they are being filled. 3939fa9e4066Sahrens */ 3940fa9e4066Sahrens static int 3941fa9e4066Sahrens zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 3942fa9e4066Sahrens caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 3943fa9e4066Sahrens { 3944fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3945fa9e4066Sahrens page_t *pp, *cur_pp; 3946fa9e4066Sahrens objset_t *os = zp->z_zfsvfs->z_os; 3947fa9e4066Sahrens u_offset_t io_off, total; 3948fa9e4066Sahrens size_t io_len; 3949fa9e4066Sahrens int err; 3950fa9e4066Sahrens 395144eda4d7Smaybee if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 3952ac05c741SMark Maybee /* 3953ac05c741SMark Maybee * We only have a single page, don't bother klustering 3954ac05c741SMark Maybee */ 3955fa9e4066Sahrens io_off = off; 3956fa9e4066Sahrens io_len = PAGESIZE; 3957ed886187SMark Maybee pp = page_create_va(vp, io_off, io_len, 3958ed886187SMark Maybee PG_EXCL | PG_WAIT, seg, addr); 3959fa9e4066Sahrens } else { 3960fa9e4066Sahrens /* 3961ac05c741SMark Maybee * Try to find enough pages to fill the page list 3962fa9e4066Sahrens */ 3963fa9e4066Sahrens pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 3964ac05c741SMark Maybee &io_len, off, plsz, 0); 3965fa9e4066Sahrens } 3966fa9e4066Sahrens if (pp == NULL) { 3967fa9e4066Sahrens /* 3968ac05c741SMark Maybee * The page already exists, nothing to do here. 3969fa9e4066Sahrens */ 3970fa9e4066Sahrens *pl = NULL; 3971fa9e4066Sahrens return (0); 3972fa9e4066Sahrens } 3973fa9e4066Sahrens 3974fa9e4066Sahrens /* 3975fa9e4066Sahrens * Fill the pages in the kluster. 3976fa9e4066Sahrens */ 3977fa9e4066Sahrens cur_pp = pp; 3978fa9e4066Sahrens for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 3979ac05c741SMark Maybee caddr_t va; 3980ac05c741SMark Maybee 398144eda4d7Smaybee ASSERT3U(io_off, ==, cur_pp->p_offset); 39820fab61baSJonathan W Adams va = zfs_map_page(cur_pp, S_WRITE); 3983*7bfdf011SNeil Perrin err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va, 3984*7bfdf011SNeil Perrin DMU_READ_PREFETCH); 39850fab61baSJonathan W Adams zfs_unmap_page(cur_pp, va); 3986fa9e4066Sahrens if (err) { 3987fa9e4066Sahrens /* On error, toss the entire kluster */ 3988fa9e4066Sahrens pvn_read_done(pp, B_ERROR); 3989b87f3af3Sperrin /* convert checksum errors into IO errors */ 3990b87f3af3Sperrin if (err == ECKSUM) 3991b87f3af3Sperrin err = EIO; 3992fa9e4066Sahrens return (err); 3993fa9e4066Sahrens } 3994fa9e4066Sahrens cur_pp = cur_pp->p_next; 3995fa9e4066Sahrens } 3996ac05c741SMark Maybee 3997fa9e4066Sahrens /* 3998ac05c741SMark Maybee * Fill in the page list array from the kluster starting 3999ac05c741SMark Maybee * from the desired offset `off'. 4000fa9e4066Sahrens * NOTE: the page list will always be null terminated. 4001fa9e4066Sahrens */ 4002fa9e4066Sahrens pvn_plist_init(pp, pl, plsz, off, io_len, rw); 4003ac05c741SMark Maybee ASSERT(pl == NULL || (*pl)->p_offset == off); 4004fa9e4066Sahrens 4005fa9e4066Sahrens return (0); 4006fa9e4066Sahrens } 4007fa9e4066Sahrens 4008fa9e4066Sahrens /* 4009fa9e4066Sahrens * Return pointers to the pages for the file region [off, off + len] 4010fa9e4066Sahrens * in the pl array. If plsz is greater than len, this function may 4011ac05c741SMark Maybee * also return page pointers from after the specified region 4012ac05c741SMark Maybee * (i.e. the region [off, off + plsz]). These additional pages are 4013ac05c741SMark Maybee * only returned if they are already in the cache, or were created as 4014ac05c741SMark Maybee * part of a klustered read. 4015fa9e4066Sahrens * 4016fa9e4066Sahrens * IN: vp - vnode of file to get data from. 4017fa9e4066Sahrens * off - position in file to get data from. 4018fa9e4066Sahrens * len - amount of data to retrieve. 4019fa9e4066Sahrens * plsz - length of provided page list. 4020fa9e4066Sahrens * seg - segment to obtain pages for. 4021fa9e4066Sahrens * addr - virtual address of fault. 4022fa9e4066Sahrens * rw - mode of created pages. 4023fa9e4066Sahrens * cr - credentials of caller. 4024da6c28aaSamw * ct - caller context. 4025fa9e4066Sahrens * 4026fa9e4066Sahrens * OUT: protp - protection mode of created pages. 4027fa9e4066Sahrens * pl - list of pages created. 4028fa9e4066Sahrens * 4029fa9e4066Sahrens * RETURN: 0 if success 4030fa9e4066Sahrens * error code if failure 4031fa9e4066Sahrens * 4032fa9e4066Sahrens * Timestamps: 4033fa9e4066Sahrens * vp - atime updated 4034fa9e4066Sahrens */ 4035fa9e4066Sahrens /* ARGSUSED */ 4036fa9e4066Sahrens static int 4037fa9e4066Sahrens zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 4038fa9e4066Sahrens page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 4039da6c28aaSamw enum seg_rw rw, cred_t *cr, caller_context_t *ct) 4040fa9e4066Sahrens { 4041fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4042fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4043ac05c741SMark Maybee page_t **pl0 = pl; 4044ac05c741SMark Maybee int err = 0; 4045ac05c741SMark Maybee 4046ac05c741SMark Maybee /* we do our own caching, faultahead is unnecessary */ 4047ac05c741SMark Maybee if (pl == NULL) 4048ac05c741SMark Maybee return (0); 4049ac05c741SMark Maybee else if (len > plsz) 4050ac05c741SMark Maybee len = plsz; 405127bd165aSMark Maybee else 405227bd165aSMark Maybee len = P2ROUNDUP(len, PAGESIZE); 4053ac05c741SMark Maybee ASSERT(plsz >= len); 4054fa9e4066Sahrens 40553cb34c60Sahrens ZFS_ENTER(zfsvfs); 40563cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4057fa9e4066Sahrens 4058fa9e4066Sahrens if (protp) 4059fa9e4066Sahrens *protp = PROT_ALL; 4060fa9e4066Sahrens 4061fa9e4066Sahrens /* 4062ed886187SMark Maybee * Loop through the requested range [off, off + len) looking 4063fa9e4066Sahrens * for pages. If we don't find a page, we will need to create 4064fa9e4066Sahrens * a new page and fill it with data from the file. 4065fa9e4066Sahrens */ 4066fa9e4066Sahrens while (len > 0) { 4067ac05c741SMark Maybee if (*pl = page_lookup(vp, off, SE_SHARED)) 4068ac05c741SMark Maybee *(pl+1) = NULL; 4069ac05c741SMark Maybee else if (err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw)) 4070ac05c741SMark Maybee goto out; 4071ac05c741SMark Maybee while (*pl) { 4072ac05c741SMark Maybee ASSERT3U((*pl)->p_offset, ==, off); 4073fa9e4066Sahrens off += PAGESIZE; 4074fa9e4066Sahrens addr += PAGESIZE; 407527bd165aSMark Maybee if (len > 0) { 407627bd165aSMark Maybee ASSERT3U(len, >=, PAGESIZE); 4077ac05c741SMark Maybee len -= PAGESIZE; 407827bd165aSMark Maybee } 4079ac05c741SMark Maybee ASSERT3U(plsz, >=, PAGESIZE); 4080fa9e4066Sahrens plsz -= PAGESIZE; 4081ac05c741SMark Maybee pl++; 4082fa9e4066Sahrens } 4083fa9e4066Sahrens } 4084fa9e4066Sahrens 4085fa9e4066Sahrens /* 4086fa9e4066Sahrens * Fill out the page array with any pages already in the cache. 4087fa9e4066Sahrens */ 4088ac05c741SMark Maybee while (plsz > 0 && 4089ac05c741SMark Maybee (*pl++ = page_lookup_nowait(vp, off, SE_SHARED))) { 4090ac05c741SMark Maybee off += PAGESIZE; 4091ac05c741SMark Maybee plsz -= PAGESIZE; 4092fa9e4066Sahrens } 4093fa9e4066Sahrens out: 4094fe2f476aSperrin if (err) { 4095fe2f476aSperrin /* 4096fe2f476aSperrin * Release any pages we have previously locked. 4097fe2f476aSperrin */ 4098fe2f476aSperrin while (pl > pl0) 4099fe2f476aSperrin page_unlock(*--pl); 4100ac05c741SMark Maybee } else { 4101ac05c741SMark Maybee ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 4102fe2f476aSperrin } 4103fe2f476aSperrin 4104fa9e4066Sahrens *pl = NULL; 4105fa9e4066Sahrens 4106fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4107fa9e4066Sahrens return (err); 4108fa9e4066Sahrens } 4109fa9e4066Sahrens 4110ea8dc4b6Seschrock /* 4111ea8dc4b6Seschrock * Request a memory map for a section of a file. This code interacts 4112ea8dc4b6Seschrock * with common code and the VM system as follows: 4113ea8dc4b6Seschrock * 4114ea8dc4b6Seschrock * common code calls mmap(), which ends up in smmap_common() 4115ea8dc4b6Seschrock * 4116ea8dc4b6Seschrock * this calls VOP_MAP(), which takes you into (say) zfs 4117ea8dc4b6Seschrock * 4118ea8dc4b6Seschrock * zfs_map() calls as_map(), passing segvn_create() as the callback 4119ea8dc4b6Seschrock * 4120ea8dc4b6Seschrock * segvn_create() creates the new segment and calls VOP_ADDMAP() 4121ea8dc4b6Seschrock * 4122ea8dc4b6Seschrock * zfs_addmap() updates z_mapcnt 4123ea8dc4b6Seschrock */ 4124da6c28aaSamw /*ARGSUSED*/ 4125fa9e4066Sahrens static int 4126fa9e4066Sahrens zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 4127da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4128da6c28aaSamw caller_context_t *ct) 4129fa9e4066Sahrens { 4130fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4131fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4132fa9e4066Sahrens segvn_crargs_t vn_a; 4133fa9e4066Sahrens int error; 4134fa9e4066Sahrens 41350616c50eSmarks ZFS_ENTER(zfsvfs); 41360616c50eSmarks ZFS_VERIFY_ZP(zp); 41370616c50eSmarks 4138da6c28aaSamw if ((prot & PROT_WRITE) && 4139da6c28aaSamw (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_READONLY | 41400616c50eSmarks ZFS_APPENDONLY))) { 41410616c50eSmarks ZFS_EXIT(zfsvfs); 4142da6c28aaSamw return (EPERM); 41430616c50eSmarks } 4144da6c28aaSamw 41450616c50eSmarks if ((prot & (PROT_READ | PROT_EXEC)) && 41460616c50eSmarks (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED)) { 41470616c50eSmarks ZFS_EXIT(zfsvfs); 41480616c50eSmarks return (EACCES); 41490616c50eSmarks } 4150fa9e4066Sahrens 4151fa9e4066Sahrens if (vp->v_flag & VNOMAP) { 4152fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4153fa9e4066Sahrens return (ENOSYS); 4154fa9e4066Sahrens } 4155fa9e4066Sahrens 4156fa9e4066Sahrens if (off < 0 || len > MAXOFFSET_T - off) { 4157fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4158fa9e4066Sahrens return (ENXIO); 4159fa9e4066Sahrens } 4160fa9e4066Sahrens 4161fa9e4066Sahrens if (vp->v_type != VREG) { 4162fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4163fa9e4066Sahrens return (ENODEV); 4164fa9e4066Sahrens } 4165fa9e4066Sahrens 4166fa9e4066Sahrens /* 4167fa9e4066Sahrens * If file is locked, disallow mapping. 4168fa9e4066Sahrens */ 4169ea8dc4b6Seschrock if (MANDMODE((mode_t)zp->z_phys->zp_mode) && vn_has_flocks(vp)) { 4170ea8dc4b6Seschrock ZFS_EXIT(zfsvfs); 4171ea8dc4b6Seschrock return (EAGAIN); 4172fa9e4066Sahrens } 4173fa9e4066Sahrens 4174fa9e4066Sahrens as_rangelock(as); 417560946fe0Smec error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); 417660946fe0Smec if (error != 0) { 417760946fe0Smec as_rangeunlock(as); 417860946fe0Smec ZFS_EXIT(zfsvfs); 417960946fe0Smec return (error); 4180fa9e4066Sahrens } 4181fa9e4066Sahrens 4182fa9e4066Sahrens vn_a.vp = vp; 4183fa9e4066Sahrens vn_a.offset = (u_offset_t)off; 4184fa9e4066Sahrens vn_a.type = flags & MAP_TYPE; 4185fa9e4066Sahrens vn_a.prot = prot; 4186fa9e4066Sahrens vn_a.maxprot = maxprot; 4187fa9e4066Sahrens vn_a.cred = cr; 4188fa9e4066Sahrens vn_a.amp = NULL; 4189fa9e4066Sahrens vn_a.flags = flags & ~MAP_TYPE; 41904944b02eSkchow vn_a.szc = 0; 41914944b02eSkchow vn_a.lgrp_mem_policy_flags = 0; 4192fa9e4066Sahrens 4193fa9e4066Sahrens error = as_map(as, *addrp, len, segvn_create, &vn_a); 4194fa9e4066Sahrens 4195fa9e4066Sahrens as_rangeunlock(as); 4196fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4197fa9e4066Sahrens return (error); 4198fa9e4066Sahrens } 4199fa9e4066Sahrens 4200fa9e4066Sahrens /* ARGSUSED */ 4201fa9e4066Sahrens static int 4202fa9e4066Sahrens zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4203da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4204da6c28aaSamw caller_context_t *ct) 4205fa9e4066Sahrens { 4206ea8dc4b6Seschrock uint64_t pages = btopr(len); 4207ea8dc4b6Seschrock 4208ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 4209fa9e4066Sahrens return (0); 4210fa9e4066Sahrens } 4211fa9e4066Sahrens 4212b468a217Seschrock /* 4213b468a217Seschrock * The reason we push dirty pages as part of zfs_delmap() is so that we get a 4214b468a217Seschrock * more accurate mtime for the associated file. Since we don't have a way of 4215b468a217Seschrock * detecting when the data was actually modified, we have to resort to 4216b468a217Seschrock * heuristics. If an explicit msync() is done, then we mark the mtime when the 4217b468a217Seschrock * last page is pushed. The problem occurs when the msync() call is omitted, 4218b468a217Seschrock * which by far the most common case: 4219b468a217Seschrock * 4220b468a217Seschrock * open() 4221b468a217Seschrock * mmap() 4222b468a217Seschrock * <modify memory> 4223b468a217Seschrock * munmap() 4224b468a217Seschrock * close() 4225b468a217Seschrock * <time lapse> 4226b468a217Seschrock * putpage() via fsflush 4227b468a217Seschrock * 4228b468a217Seschrock * If we wait until fsflush to come along, we can have a modification time that 4229b468a217Seschrock * is some arbitrary point in the future. In order to prevent this in the 4230b468a217Seschrock * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is 4231b468a217Seschrock * torn down. 4232b468a217Seschrock */ 4233fa9e4066Sahrens /* ARGSUSED */ 4234fa9e4066Sahrens static int 4235fa9e4066Sahrens zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4236da6c28aaSamw size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr, 4237da6c28aaSamw caller_context_t *ct) 4238fa9e4066Sahrens { 4239ea8dc4b6Seschrock uint64_t pages = btopr(len); 4240ea8dc4b6Seschrock 4241ea8dc4b6Seschrock ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 4242ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 4243b468a217Seschrock 4244b468a217Seschrock if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && 4245b468a217Seschrock vn_has_cached_data(vp)) 4246da6c28aaSamw (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct); 4247b468a217Seschrock 4248fa9e4066Sahrens return (0); 4249fa9e4066Sahrens } 4250fa9e4066Sahrens 4251fa9e4066Sahrens /* 4252fa9e4066Sahrens * Free or allocate space in a file. Currently, this function only 4253fa9e4066Sahrens * supports the `F_FREESP' command. However, this command is somewhat 4254fa9e4066Sahrens * misnamed, as its functionality includes the ability to allocate as 4255fa9e4066Sahrens * well as free space. 4256fa9e4066Sahrens * 4257fa9e4066Sahrens * IN: vp - vnode of file to free data in. 4258fa9e4066Sahrens * cmd - action to take (only F_FREESP supported). 4259fa9e4066Sahrens * bfp - section of file to free/alloc. 4260fa9e4066Sahrens * flag - current file open mode flags. 4261fa9e4066Sahrens * offset - current file offset. 4262fa9e4066Sahrens * cr - credentials of caller [UNUSED]. 4263da6c28aaSamw * ct - caller context. 4264fa9e4066Sahrens * 4265fa9e4066Sahrens * RETURN: 0 if success 4266fa9e4066Sahrens * error code if failure 4267fa9e4066Sahrens * 4268fa9e4066Sahrens * Timestamps: 4269fa9e4066Sahrens * vp - ctime|mtime updated 4270fa9e4066Sahrens */ 4271fa9e4066Sahrens /* ARGSUSED */ 4272fa9e4066Sahrens static int 4273fa9e4066Sahrens zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 4274fa9e4066Sahrens offset_t offset, cred_t *cr, caller_context_t *ct) 4275fa9e4066Sahrens { 4276fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4277fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4278fa9e4066Sahrens uint64_t off, len; 4279fa9e4066Sahrens int error; 4280fa9e4066Sahrens 42813cb34c60Sahrens ZFS_ENTER(zfsvfs); 42823cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4283fa9e4066Sahrens 4284fa9e4066Sahrens if (cmd != F_FREESP) { 4285fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4286fa9e4066Sahrens return (EINVAL); 4287fa9e4066Sahrens } 4288fa9e4066Sahrens 4289fa9e4066Sahrens if (error = convoff(vp, bfp, 0, offset)) { 4290fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4291fa9e4066Sahrens return (error); 4292fa9e4066Sahrens } 4293fa9e4066Sahrens 4294fa9e4066Sahrens if (bfp->l_len < 0) { 4295fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4296fa9e4066Sahrens return (EINVAL); 4297fa9e4066Sahrens } 4298fa9e4066Sahrens 4299fa9e4066Sahrens off = bfp->l_start; 4300104e2ed7Sperrin len = bfp->l_len; /* 0 means from off to end of file */ 4301104e2ed7Sperrin 4302cdb0ab79Smaybee error = zfs_freesp(zp, off, len, flag, TRUE); 4303fa9e4066Sahrens 4304fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4305fa9e4066Sahrens return (error); 4306fa9e4066Sahrens } 4307fa9e4066Sahrens 4308da6c28aaSamw /*ARGSUSED*/ 4309fa9e4066Sahrens static int 4310da6c28aaSamw zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct) 4311fa9e4066Sahrens { 4312fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4313fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4314f18faf3fSek uint32_t gen; 4315fa9e4066Sahrens uint64_t object = zp->z_id; 4316fa9e4066Sahrens zfid_short_t *zfid; 4317fa9e4066Sahrens int size, i; 4318fa9e4066Sahrens 43193cb34c60Sahrens ZFS_ENTER(zfsvfs); 43203cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4321f18faf3fSek gen = (uint32_t)zp->z_gen; 4322fa9e4066Sahrens 4323fa9e4066Sahrens size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 4324fa9e4066Sahrens if (fidp->fid_len < size) { 4325fa9e4066Sahrens fidp->fid_len = size; 43260f2dc02eSek ZFS_EXIT(zfsvfs); 4327fa9e4066Sahrens return (ENOSPC); 4328fa9e4066Sahrens } 4329fa9e4066Sahrens 4330fa9e4066Sahrens zfid = (zfid_short_t *)fidp; 4331fa9e4066Sahrens 4332fa9e4066Sahrens zfid->zf_len = size; 4333fa9e4066Sahrens 4334fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_object); i++) 4335fa9e4066Sahrens zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 4336fa9e4066Sahrens 4337fa9e4066Sahrens /* Must have a non-zero generation number to distinguish from .zfs */ 4338fa9e4066Sahrens if (gen == 0) 4339fa9e4066Sahrens gen = 1; 4340fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_gen); i++) 4341fa9e4066Sahrens zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 4342fa9e4066Sahrens 4343fa9e4066Sahrens if (size == LONG_FID_LEN) { 4344fa9e4066Sahrens uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 4345fa9e4066Sahrens zfid_long_t *zlfid; 4346fa9e4066Sahrens 4347fa9e4066Sahrens zlfid = (zfid_long_t *)fidp; 4348fa9e4066Sahrens 4349fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setid); i++) 4350fa9e4066Sahrens zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 4351fa9e4066Sahrens 4352fa9e4066Sahrens /* XXX - this should be the generation number for the objset */ 4353fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 4354fa9e4066Sahrens zlfid->zf_setgen[i] = 0; 4355fa9e4066Sahrens } 4356fa9e4066Sahrens 4357fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4358fa9e4066Sahrens return (0); 4359fa9e4066Sahrens } 4360fa9e4066Sahrens 4361fa9e4066Sahrens static int 4362da6c28aaSamw zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, 4363da6c28aaSamw caller_context_t *ct) 4364fa9e4066Sahrens { 4365fa9e4066Sahrens znode_t *zp, *xzp; 4366fa9e4066Sahrens zfsvfs_t *zfsvfs; 4367fa9e4066Sahrens zfs_dirlock_t *dl; 4368fa9e4066Sahrens int error; 4369fa9e4066Sahrens 4370fa9e4066Sahrens switch (cmd) { 4371fa9e4066Sahrens case _PC_LINK_MAX: 4372fa9e4066Sahrens *valp = ULONG_MAX; 4373fa9e4066Sahrens return (0); 4374fa9e4066Sahrens 4375fa9e4066Sahrens case _PC_FILESIZEBITS: 4376fa9e4066Sahrens *valp = 64; 4377fa9e4066Sahrens return (0); 4378fa9e4066Sahrens 4379fa9e4066Sahrens case _PC_XATTR_EXISTS: 4380fa9e4066Sahrens zp = VTOZ(vp); 4381fa9e4066Sahrens zfsvfs = zp->z_zfsvfs; 43823cb34c60Sahrens ZFS_ENTER(zfsvfs); 43833cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4384fa9e4066Sahrens *valp = 0; 4385fa9e4066Sahrens error = zfs_dirent_lock(&dl, zp, "", &xzp, 4386da6c28aaSamw ZXATTR | ZEXISTS | ZSHARED, NULL, NULL); 4387fa9e4066Sahrens if (error == 0) { 4388fa9e4066Sahrens zfs_dirent_unlock(dl); 4389fa9e4066Sahrens if (!zfs_dirempty(xzp)) 4390fa9e4066Sahrens *valp = 1; 4391fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 4392fa9e4066Sahrens } else if (error == ENOENT) { 4393fa9e4066Sahrens /* 4394fa9e4066Sahrens * If there aren't extended attributes, it's the 4395fa9e4066Sahrens * same as having zero of them. 4396fa9e4066Sahrens */ 4397fa9e4066Sahrens error = 0; 4398fa9e4066Sahrens } 4399fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4400fa9e4066Sahrens return (error); 4401fa9e4066Sahrens 4402da6c28aaSamw case _PC_SATTR_ENABLED: 4403da6c28aaSamw case _PC_SATTR_EXISTS: 44049660e5cbSJanice Chang *valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 4405da6c28aaSamw (vp->v_type == VREG || vp->v_type == VDIR); 4406da6c28aaSamw return (0); 4407da6c28aaSamw 4408fa9e4066Sahrens case _PC_ACL_ENABLED: 4409fa9e4066Sahrens *valp = _ACL_ACE_ENABLED; 4410fa9e4066Sahrens return (0); 4411fa9e4066Sahrens 4412fa9e4066Sahrens case _PC_MIN_HOLE_SIZE: 4413fa9e4066Sahrens *valp = (ulong_t)SPA_MINBLOCKSIZE; 4414fa9e4066Sahrens return (0); 4415fa9e4066Sahrens 4416fa9e4066Sahrens default: 4417da6c28aaSamw return (fs_pathconf(vp, cmd, valp, cr, ct)); 4418fa9e4066Sahrens } 4419fa9e4066Sahrens } 4420fa9e4066Sahrens 4421fa9e4066Sahrens /*ARGSUSED*/ 4422fa9e4066Sahrens static int 4423da6c28aaSamw zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4424da6c28aaSamw caller_context_t *ct) 4425fa9e4066Sahrens { 4426fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4427fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4428fa9e4066Sahrens int error; 4429da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4430fa9e4066Sahrens 44313cb34c60Sahrens ZFS_ENTER(zfsvfs); 44323cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4433da6c28aaSamw error = zfs_getacl(zp, vsecp, skipaclchk, cr); 4434fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4435fa9e4066Sahrens 4436fa9e4066Sahrens return (error); 4437fa9e4066Sahrens } 4438fa9e4066Sahrens 4439fa9e4066Sahrens /*ARGSUSED*/ 4440fa9e4066Sahrens static int 4441da6c28aaSamw zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4442da6c28aaSamw caller_context_t *ct) 4443fa9e4066Sahrens { 4444fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4445fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4446fa9e4066Sahrens int error; 4447da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4448fa9e4066Sahrens 44493cb34c60Sahrens ZFS_ENTER(zfsvfs); 44503cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4451da6c28aaSamw error = zfs_setacl(zp, vsecp, skipaclchk, cr); 4452fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4453fa9e4066Sahrens return (error); 4454fa9e4066Sahrens } 4455fa9e4066Sahrens 4456fa9e4066Sahrens /* 4457fa9e4066Sahrens * Predeclare these here so that the compiler assumes that 4458fa9e4066Sahrens * this is an "old style" function declaration that does 4459fa9e4066Sahrens * not include arguments => we won't get type mismatch errors 4460fa9e4066Sahrens * in the initializations that follow. 4461fa9e4066Sahrens */ 4462fa9e4066Sahrens static int zfs_inval(); 4463fa9e4066Sahrens static int zfs_isdir(); 4464fa9e4066Sahrens 4465fa9e4066Sahrens static int 4466fa9e4066Sahrens zfs_inval() 4467fa9e4066Sahrens { 4468fa9e4066Sahrens return (EINVAL); 4469fa9e4066Sahrens } 4470fa9e4066Sahrens 4471fa9e4066Sahrens static int 4472fa9e4066Sahrens zfs_isdir() 4473fa9e4066Sahrens { 4474fa9e4066Sahrens return (EISDIR); 4475fa9e4066Sahrens } 4476fa9e4066Sahrens /* 4477fa9e4066Sahrens * Directory vnode operations template 4478fa9e4066Sahrens */ 4479fa9e4066Sahrens vnodeops_t *zfs_dvnodeops; 4480fa9e4066Sahrens const fs_operation_def_t zfs_dvnodeops_template[] = { 4481aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4482aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4483aa59c4cbSrsb VOPNAME_READ, { .error = zfs_isdir }, 4484aa59c4cbSrsb VOPNAME_WRITE, { .error = zfs_isdir }, 4485aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4486aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4487aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4488aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4489aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4490aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4491aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4492aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4493aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4494aa59c4cbSrsb VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, 4495aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4496aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4497aa59c4cbSrsb VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, 4498aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4499aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4500aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4501aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4502aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4503aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4504aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4505df2381bfSpraks VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4506aa59c4cbSrsb NULL, NULL 4507fa9e4066Sahrens }; 4508fa9e4066Sahrens 4509fa9e4066Sahrens /* 4510fa9e4066Sahrens * Regular file vnode operations template 4511fa9e4066Sahrens */ 4512fa9e4066Sahrens vnodeops_t *zfs_fvnodeops; 4513fa9e4066Sahrens const fs_operation_def_t zfs_fvnodeops_template[] = { 4514aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4515aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4516aa59c4cbSrsb VOPNAME_READ, { .vop_read = zfs_read }, 4517aa59c4cbSrsb VOPNAME_WRITE, { .vop_write = zfs_write }, 4518aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4519aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4520aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4521aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4522aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4523aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4524aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4525aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4526aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4527aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4528aa59c4cbSrsb VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, 4529aa59c4cbSrsb VOPNAME_SPACE, { .vop_space = zfs_space }, 4530aa59c4cbSrsb VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, 4531aa59c4cbSrsb VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, 4532aa59c4cbSrsb VOPNAME_MAP, { .vop_map = zfs_map }, 4533aa59c4cbSrsb VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, 4534aa59c4cbSrsb VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, 4535aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4536aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4537aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4538aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4539aa59c4cbSrsb NULL, NULL 4540fa9e4066Sahrens }; 4541fa9e4066Sahrens 4542fa9e4066Sahrens /* 4543fa9e4066Sahrens * Symbolic link vnode operations template 4544fa9e4066Sahrens */ 4545fa9e4066Sahrens vnodeops_t *zfs_symvnodeops; 4546fa9e4066Sahrens const fs_operation_def_t zfs_symvnodeops_template[] = { 4547aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4548aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4549aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4550aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4551aa59c4cbSrsb VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, 4552aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4553aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4554aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4555aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4556aa59c4cbSrsb NULL, NULL 4557fa9e4066Sahrens }; 4558fa9e4066Sahrens 4559743a77edSAlan Wright /* 4560743a77edSAlan Wright * special share hidden files vnode operations template 4561743a77edSAlan Wright */ 4562743a77edSAlan Wright vnodeops_t *zfs_sharevnodeops; 4563743a77edSAlan Wright const fs_operation_def_t zfs_sharevnodeops_template[] = { 4564743a77edSAlan Wright VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4565743a77edSAlan Wright VOPNAME_ACCESS, { .vop_access = zfs_access }, 4566743a77edSAlan Wright VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4567743a77edSAlan Wright VOPNAME_FID, { .vop_fid = zfs_fid }, 4568743a77edSAlan Wright VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4569743a77edSAlan Wright VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4570743a77edSAlan Wright VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4571743a77edSAlan Wright VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4572743a77edSAlan Wright NULL, NULL 4573743a77edSAlan Wright }; 4574743a77edSAlan Wright 4575fa9e4066Sahrens /* 4576fa9e4066Sahrens * Extended attribute directory vnode operations template 4577fa9e4066Sahrens * This template is identical to the directory vnodes 4578fa9e4066Sahrens * operation template except for restricted operations: 4579fa9e4066Sahrens * VOP_MKDIR() 4580fa9e4066Sahrens * VOP_SYMLINK() 4581fa9e4066Sahrens * Note that there are other restrictions embedded in: 4582fa9e4066Sahrens * zfs_create() - restrict type to VREG 4583fa9e4066Sahrens * zfs_link() - no links into/out of attribute space 4584fa9e4066Sahrens * zfs_rename() - no moves into/out of attribute space 4585fa9e4066Sahrens */ 4586fa9e4066Sahrens vnodeops_t *zfs_xdvnodeops; 4587fa9e4066Sahrens const fs_operation_def_t zfs_xdvnodeops_template[] = { 4588aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4589aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4590aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4591aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4592aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4593aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4594aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4595aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4596aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4597aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4598aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4599aa59c4cbSrsb VOPNAME_MKDIR, { .error = zfs_inval }, 4600aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4601aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4602aa59c4cbSrsb VOPNAME_SYMLINK, { .error = zfs_inval }, 4603aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4604aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4605aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4606aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4607aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4608aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4609aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4610aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4611aa59c4cbSrsb NULL, NULL 4612fa9e4066Sahrens }; 4613fa9e4066Sahrens 4614fa9e4066Sahrens /* 4615fa9e4066Sahrens * Error vnode operations template 4616fa9e4066Sahrens */ 4617fa9e4066Sahrens vnodeops_t *zfs_evnodeops; 4618fa9e4066Sahrens const fs_operation_def_t zfs_evnodeops_template[] = { 4619aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4620aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4621aa59c4cbSrsb NULL, NULL 4622fa9e4066Sahrens }; 4623