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 */ 211c17160aSKevin Crowe 22fa9e4066Sahrens /* 23d39ee142SMark Shellenbaum * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24ade42b55SSebastien Roy * Copyright (c) 2012, 2017 by Delphix. All rights reserved. 25c3d26abcSMatthew Ahrens * Copyright (c) 2014 Integros [integros.com] 26aaa9aa59SJerry Jelinek * Copyright 2020 Joyent, Inc. 271c17160aSKevin Crowe * Copyright 2017 Nexenta Systems, Inc. 28fa9e4066Sahrens */ 29fa9e4066Sahrens 3075c76197Speteh /* Portions Copyright 2007 Jeremy Teo */ 3155da60b9SMark J Musante /* Portions Copyright 2010 Robert Milkowski */ 3275c76197Speteh 33fa9e4066Sahrens #include <sys/types.h> 34fa9e4066Sahrens #include <sys/param.h> 35fa9e4066Sahrens #include <sys/time.h> 36fa9e4066Sahrens #include <sys/systm.h> 37fa9e4066Sahrens #include <sys/sysmacros.h> 38fa9e4066Sahrens #include <sys/resource.h> 39fa9e4066Sahrens #include <sys/vfs.h> 40aa59c4cbSrsb #include <sys/vfs_opreg.h> 41fa9e4066Sahrens #include <sys/vnode.h> 42fa9e4066Sahrens #include <sys/file.h> 43fa9e4066Sahrens #include <sys/stat.h> 44fa9e4066Sahrens #include <sys/kmem.h> 45fa9e4066Sahrens #include <sys/taskq.h> 46fa9e4066Sahrens #include <sys/uio.h> 47fa9e4066Sahrens #include <sys/vmsystm.h> 48fa9e4066Sahrens #include <sys/atomic.h> 4944eda4d7Smaybee #include <sys/vm.h> 50fa9e4066Sahrens #include <vm/seg_vn.h> 51fa9e4066Sahrens #include <vm/pvn.h> 52fa9e4066Sahrens #include <vm/as.h> 530fab61baSJonathan W Adams #include <vm/kpm.h> 540fab61baSJonathan W Adams #include <vm/seg_kpm.h> 55fa9e4066Sahrens #include <sys/mman.h> 56fa9e4066Sahrens #include <sys/pathname.h> 57fa9e4066Sahrens #include <sys/cmn_err.h> 58fa9e4066Sahrens #include <sys/errno.h> 59fa9e4066Sahrens #include <sys/unistd.h> 60fa9e4066Sahrens #include <sys/zfs_dir.h> 61fa9e4066Sahrens #include <sys/zfs_acl.h> 62fa9e4066Sahrens #include <sys/zfs_ioctl.h> 63fa9e4066Sahrens #include <sys/fs/zfs.h> 64fa9e4066Sahrens #include <sys/dmu.h> 6555da60b9SMark J Musante #include <sys/dmu_objset.h> 66fa9e4066Sahrens #include <sys/spa.h> 67fa9e4066Sahrens #include <sys/txg.h> 68fa9e4066Sahrens #include <sys/dbuf.h> 69fa9e4066Sahrens #include <sys/zap.h> 700a586ceaSMark Shellenbaum #include <sys/sa.h> 71fa9e4066Sahrens #include <sys/dirent.h> 72fa9e4066Sahrens #include <sys/policy.h> 73fa9e4066Sahrens #include <sys/sunddi.h> 74fa9e4066Sahrens #include <sys/filio.h> 75c1ce5987SMark Shellenbaum #include <sys/sid.h> 76fa9e4066Sahrens #include "fs/fs_subr.h" 77fa9e4066Sahrens #include <sys/zfs_ctldir.h> 78da6c28aaSamw #include <sys/zfs_fuid.h> 790a586ceaSMark Shellenbaum #include <sys/zfs_sa.h> 80033f9833Sek #include <sys/dnlc.h> 81104e2ed7Sperrin #include <sys/zfs_rlock.h> 82da6c28aaSamw #include <sys/extdirent.h> 83da6c28aaSamw #include <sys/kidmap.h> 8467dbe2beSCasper H.S. Dik #include <sys/cred.h> 85b38f0970Sck #include <sys/attr.h> 861271e4b1SPrakash Surya #include <sys/zil.h> 87f67950b2SNasf-Fan #include <sys/sa_impl.h> 88f67950b2SNasf-Fan #include <sys/zfs_project.h> 89fa9e4066Sahrens 90fa9e4066Sahrens /* 91fa9e4066Sahrens * Programming rules. 92fa9e4066Sahrens * 93fa9e4066Sahrens * Each vnode op performs some logical unit of work. To do this, the ZPL must 94fa9e4066Sahrens * properly lock its in-core state, create a DMU transaction, do the work, 95fa9e4066Sahrens * record this work in the intent log (ZIL), commit the DMU transaction, 96da6c28aaSamw * and wait for the intent log to commit if it is a synchronous operation. 97da6c28aaSamw * Moreover, the vnode ops must work in both normal and log replay context. 98fa9e4066Sahrens * The ordering of events is important to avoid deadlocks and references 99fa9e4066Sahrens * to freed memory. The example below illustrates the following Big Rules: 100fa9e4066Sahrens * 101f7170741SWill Andrews * (1) A check must be made in each zfs thread for a mounted file system. 1023cb34c60Sahrens * This is done avoiding races using ZFS_ENTER(zfsvfs). 103f7170741SWill Andrews * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes 104f7170741SWill Andrews * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros 105f7170741SWill Andrews * can return EIO from the calling function. 106fa9e4066Sahrens * 107fa9e4066Sahrens * (2) VN_RELE() should always be the last thing except for zil_commit() 108b19a79ecSperrin * (if necessary) and ZFS_EXIT(). This is for 3 reasons: 109fa9e4066Sahrens * First, if it's the last reference, the vnode/znode 110fa9e4066Sahrens * can be freed, so the zp may point to freed memory. Second, the last 111fa9e4066Sahrens * reference will call zfs_zinactive(), which may induce a lot of work -- 112104e2ed7Sperrin * pushing cached pages (which acquires range locks) and syncing out 113fa9e4066Sahrens * cached atime changes. Third, zfs_zinactive() may require a new tx, 114fa9e4066Sahrens * which could deadlock the system if you were already holding one. 1159d3574bfSNeil Perrin * If you must call VN_RELE() within a tx then use VN_RELE_ASYNC(). 116fa9e4066Sahrens * 1177885c754Sperrin * (3) All range locks must be grabbed before calling dmu_tx_assign(), 1187885c754Sperrin * as they can span dmu_tx_assign() calls. 1197885c754Sperrin * 120e722410cSMatthew Ahrens * (4) If ZPL locks are held, pass TXG_NOWAIT as the second argument to 121e722410cSMatthew Ahrens * dmu_tx_assign(). This is critical because we don't want to block 122e722410cSMatthew Ahrens * while holding locks. 123e722410cSMatthew Ahrens * 124e722410cSMatthew Ahrens * If no ZPL locks are held (aside from ZFS_ENTER()), use TXG_WAIT. This 125e722410cSMatthew Ahrens * reduces lock contention and CPU usage when we must wait (note that if 126e722410cSMatthew Ahrens * throughput is constrained by the storage, nearly every transaction 127e722410cSMatthew Ahrens * must wait). 128e722410cSMatthew Ahrens * 129e722410cSMatthew Ahrens * Note, in particular, that if a lock is sometimes acquired before 130e722410cSMatthew Ahrens * the tx assigns, and sometimes after (e.g. z_lock), then failing 131e722410cSMatthew Ahrens * to use a non-blocking assign can deadlock the system. The scenario: 132fa9e4066Sahrens * 133fa9e4066Sahrens * Thread A has grabbed a lock before calling dmu_tx_assign(). 134fa9e4066Sahrens * Thread B is in an already-assigned tx, and blocks for this lock. 135fa9e4066Sahrens * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 136fa9e4066Sahrens * forever, because the previous txg can't quiesce until B's tx commits. 137fa9e4066Sahrens * 138fa9e4066Sahrens * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 13969962b56SMatthew Ahrens * then drop all locks, call dmu_tx_wait(), and try again. On subsequent 140f864f99eSPrakash Surya * calls to dmu_tx_assign(), pass TXG_NOTHROTTLE in addition to TXG_NOWAIT, 14169962b56SMatthew Ahrens * to indicate that this operation has already called dmu_tx_wait(). 14269962b56SMatthew Ahrens * This will ensure that we don't retry forever, waiting a short bit 14369962b56SMatthew Ahrens * each time. 144fa9e4066Sahrens * 1457885c754Sperrin * (5) If the operation succeeded, generate the intent log entry for it 146fa9e4066Sahrens * before dropping locks. This ensures that the ordering of events 147fa9e4066Sahrens * in the intent log matches the order in which they actually occurred. 148f7170741SWill Andrews * During ZIL replay the zfs_log_* functions will update the sequence 1491209a471SNeil Perrin * number to indicate the zil transaction has replayed. 150fa9e4066Sahrens * 1517885c754Sperrin * (6) At the end of each vnode op, the DMU tx must always commit, 152fa9e4066Sahrens * regardless of whether there were any errors. 153fa9e4066Sahrens * 1545002558fSNeil Perrin * (7) After dropping all locks, invoke zil_commit(zilog, foid) 155fa9e4066Sahrens * to ensure that synchronous semantics are provided when necessary. 156fa9e4066Sahrens * 157fa9e4066Sahrens * In general, this is how things should be ordered in each vnode op: 158fa9e4066Sahrens * 159fa9e4066Sahrens * ZFS_ENTER(zfsvfs); // exit if unmounted 160fa9e4066Sahrens * top: 161fa9e4066Sahrens * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 162fa9e4066Sahrens * rw_enter(...); // grab any other locks you need 163fa9e4066Sahrens * tx = dmu_tx_create(...); // get DMU tx 164fa9e4066Sahrens * dmu_tx_hold_*(); // hold each object you might modify 165f864f99eSPrakash Surya * error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); 166fa9e4066Sahrens * if (error) { 167fa9e4066Sahrens * rw_exit(...); // drop locks 168fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 169fa9e4066Sahrens * VN_RELE(...); // release held vnodes 1701209a471SNeil Perrin * if (error == ERESTART) { 17169962b56SMatthew Ahrens * waited = B_TRUE; 1728a2f1b91Sahrens * dmu_tx_wait(tx); 1738a2f1b91Sahrens * dmu_tx_abort(tx); 174fa9e4066Sahrens * goto top; 175fa9e4066Sahrens * } 1768a2f1b91Sahrens * dmu_tx_abort(tx); // abort DMU tx 177fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 178fa9e4066Sahrens * return (error); // really out of space 179fa9e4066Sahrens * } 180fa9e4066Sahrens * error = do_real_work(); // do whatever this VOP does 181fa9e4066Sahrens * if (error == 0) 182b19a79ecSperrin * zfs_log_*(...); // on success, make ZIL entry 183fa9e4066Sahrens * dmu_tx_commit(tx); // commit DMU tx -- error or not 184fa9e4066Sahrens * rw_exit(...); // drop locks 185fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 186fa9e4066Sahrens * VN_RELE(...); // release held vnodes 1875002558fSNeil Perrin * zil_commit(zilog, foid); // synchronous when necessary 188fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 189fa9e4066Sahrens * return (error); // done, report error 190fa9e4066Sahrens */ 1913cb34c60Sahrens 192fa9e4066Sahrens /* ARGSUSED */ 193fa9e4066Sahrens static int 194da6c28aaSamw zfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) 195fa9e4066Sahrens { 19667bd71c6Sperrin znode_t *zp = VTOZ(*vpp); 197b614fdaaSMark Shellenbaum zfsvfs_t *zfsvfs = zp->z_zfsvfs; 198b614fdaaSMark Shellenbaum 199b614fdaaSMark Shellenbaum ZFS_ENTER(zfsvfs); 200b614fdaaSMark Shellenbaum ZFS_VERIFY_ZP(zp); 20167bd71c6Sperrin 2020a586ceaSMark Shellenbaum if ((flag & FWRITE) && (zp->z_pflags & ZFS_APPENDONLY) && 203da6c28aaSamw ((flag & FAPPEND) == 0)) { 204b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 205be6fd75aSMatthew Ahrens return (SET_ERROR(EPERM)); 206da6c28aaSamw } 207da6c28aaSamw 208da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 209da6c28aaSamw ZTOV(zp)->v_type == VREG && 2100a586ceaSMark Shellenbaum !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) { 211b614fdaaSMark Shellenbaum if (fs_vscan(*vpp, cr, 0) != 0) { 212b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 213be6fd75aSMatthew Ahrens return (SET_ERROR(EACCES)); 214b614fdaaSMark Shellenbaum } 215b614fdaaSMark Shellenbaum } 216da6c28aaSamw 21767bd71c6Sperrin /* Keep a count of the synchronous opens in the znode */ 21867bd71c6Sperrin if (flag & (FSYNC | FDSYNC)) 21967bd71c6Sperrin atomic_inc_32(&zp->z_sync_cnt); 220da6c28aaSamw 221b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 222fa9e4066Sahrens return (0); 223fa9e4066Sahrens } 224fa9e4066Sahrens 225fa9e4066Sahrens /* ARGSUSED */ 226fa9e4066Sahrens static int 227da6c28aaSamw zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, 228da6c28aaSamw caller_context_t *ct) 229fa9e4066Sahrens { 23067bd71c6Sperrin znode_t *zp = VTOZ(vp); 231b614fdaaSMark Shellenbaum zfsvfs_t *zfsvfs = zp->z_zfsvfs; 232b614fdaaSMark Shellenbaum 233ee8143cbSChris Kirby /* 234ee8143cbSChris Kirby * Clean up any locks held by this process on the vp. 235ee8143cbSChris Kirby */ 236ee8143cbSChris Kirby cleanlocks(vp, ddi_get_pid(), 0); 237ee8143cbSChris Kirby cleanshares(vp, ddi_get_pid()); 238ee8143cbSChris Kirby 239b614fdaaSMark Shellenbaum ZFS_ENTER(zfsvfs); 240b614fdaaSMark Shellenbaum ZFS_VERIFY_ZP(zp); 24167bd71c6Sperrin 24267bd71c6Sperrin /* Decrement the synchronous opens in the znode */ 243ecb72030Sperrin if ((flag & (FSYNC | FDSYNC)) && (count == 1)) 24467bd71c6Sperrin atomic_dec_32(&zp->z_sync_cnt); 24567bd71c6Sperrin 246da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 247da6c28aaSamw ZTOV(zp)->v_type == VREG && 2480a586ceaSMark Shellenbaum !(zp->z_pflags & ZFS_AV_QUARANTINED) && zp->z_size > 0) 249da6c28aaSamw VERIFY(fs_vscan(vp, cr, 1) == 0); 250da6c28aaSamw 251b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 252fa9e4066Sahrens return (0); 253fa9e4066Sahrens } 254fa9e4066Sahrens 255fa9e4066Sahrens /* 256fa9e4066Sahrens * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 257fa9e4066Sahrens * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 258fa9e4066Sahrens */ 259fa9e4066Sahrens static int 260fa9e4066Sahrens zfs_holey(vnode_t *vp, int cmd, offset_t *off) 261fa9e4066Sahrens { 262fa9e4066Sahrens znode_t *zp = VTOZ(vp); 263fa9e4066Sahrens uint64_t noff = (uint64_t)*off; /* new offset */ 264fa9e4066Sahrens uint64_t file_sz; 265fa9e4066Sahrens int error; 266fa9e4066Sahrens boolean_t hole; 267fa9e4066Sahrens 2680a586ceaSMark Shellenbaum file_sz = zp->z_size; 269fa9e4066Sahrens if (noff >= file_sz) { 270be6fd75aSMatthew Ahrens return (SET_ERROR(ENXIO)); 271fa9e4066Sahrens } 272fa9e4066Sahrens 273fa9e4066Sahrens if (cmd == _FIO_SEEK_HOLE) 274fa9e4066Sahrens hole = B_TRUE; 275fa9e4066Sahrens else 276fa9e4066Sahrens hole = B_FALSE; 277fa9e4066Sahrens 278fa9e4066Sahrens error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 279fa9e4066Sahrens 2800fbc0cd0SMatthew Ahrens if (error == ESRCH) 281be6fd75aSMatthew Ahrens return (SET_ERROR(ENXIO)); 2820fbc0cd0SMatthew Ahrens 2830fbc0cd0SMatthew Ahrens /* 2840fbc0cd0SMatthew Ahrens * We could find a hole that begins after the logical end-of-file, 2850fbc0cd0SMatthew Ahrens * because dmu_offset_next() only works on whole blocks. If the 2860fbc0cd0SMatthew Ahrens * EOF falls mid-block, then indicate that the "virtual hole" 2870fbc0cd0SMatthew Ahrens * at the end of the file begins at the logical EOF, rather than 2880fbc0cd0SMatthew Ahrens * at the end of the last block. 2890fbc0cd0SMatthew Ahrens */ 2900fbc0cd0SMatthew Ahrens if (noff > file_sz) { 2910fbc0cd0SMatthew Ahrens ASSERT(hole); 2920fbc0cd0SMatthew Ahrens noff = file_sz; 293fa9e4066Sahrens } 294fa9e4066Sahrens 295fa9e4066Sahrens if (noff < *off) 296fa9e4066Sahrens return (error); 297fa9e4066Sahrens *off = noff; 298fa9e4066Sahrens return (error); 299fa9e4066Sahrens } 300fa9e4066Sahrens 301f67950b2SNasf-Fan static int 302f67950b2SNasf-Fan zfs_ioctl_getxattr(vnode_t *vp, intptr_t data, int flag, cred_t *cr, 303f67950b2SNasf-Fan caller_context_t *ct) 304f67950b2SNasf-Fan { 305f67950b2SNasf-Fan zfsxattr_t fsx = { 0 }; 306f67950b2SNasf-Fan znode_t *zp = VTOZ(vp); 307f67950b2SNasf-Fan 308f67950b2SNasf-Fan if (zp->z_pflags & ZFS_PROJINHERIT) 309f67950b2SNasf-Fan fsx.fsx_xflags = ZFS_PROJINHERIT_FL; 310f67950b2SNasf-Fan if (zp->z_pflags & ZFS_PROJID) 311f67950b2SNasf-Fan fsx.fsx_projid = zp->z_projid; 312f67950b2SNasf-Fan if (ddi_copyout(&fsx, (void *)data, sizeof (fsx), flag)) 313f67950b2SNasf-Fan return (SET_ERROR(EFAULT)); 314f67950b2SNasf-Fan 315f67950b2SNasf-Fan return (0); 316f67950b2SNasf-Fan } 317f67950b2SNasf-Fan 318f67950b2SNasf-Fan static int zfs_setattr(vnode_t *, vattr_t *, int, cred_t *, caller_context_t *); 319f67950b2SNasf-Fan 320f67950b2SNasf-Fan static int 321f67950b2SNasf-Fan zfs_ioctl_setxattr(vnode_t *vp, intptr_t data, int flags, cred_t *cr, 322f67950b2SNasf-Fan caller_context_t *ct) 323f67950b2SNasf-Fan { 324f67950b2SNasf-Fan znode_t *zp = VTOZ(vp); 325f67950b2SNasf-Fan zfsxattr_t fsx; 326f67950b2SNasf-Fan xvattr_t xva; 327f67950b2SNasf-Fan xoptattr_t *xoap; 328f67950b2SNasf-Fan int err; 329f67950b2SNasf-Fan 330f67950b2SNasf-Fan if (ddi_copyin((void *)data, &fsx, sizeof (fsx), flags)) 331f67950b2SNasf-Fan return (SET_ERROR(EFAULT)); 332f67950b2SNasf-Fan 333f67950b2SNasf-Fan if (!zpl_is_valid_projid(fsx.fsx_projid)) 334f67950b2SNasf-Fan return (SET_ERROR(EINVAL)); 335f67950b2SNasf-Fan 336f67950b2SNasf-Fan if (fsx.fsx_xflags & ~ZFS_PROJINHERIT_FL) 337f67950b2SNasf-Fan return (SET_ERROR(EOPNOTSUPP)); 338f67950b2SNasf-Fan 339f67950b2SNasf-Fan xva_init(&xva); 340f67950b2SNasf-Fan xoap = xva_getxoptattr(&xva); 341f67950b2SNasf-Fan 342f67950b2SNasf-Fan XVA_SET_REQ(&xva, XAT_PROJINHERIT); 343f67950b2SNasf-Fan if (fsx.fsx_xflags & ZFS_PROJINHERIT_FL) 344f67950b2SNasf-Fan xoap->xoa_projinherit = B_TRUE; 345f67950b2SNasf-Fan 346f67950b2SNasf-Fan XVA_SET_REQ(&xva, XAT_PROJID); 347f67950b2SNasf-Fan xoap->xoa_projid = fsx.fsx_projid; 348f67950b2SNasf-Fan 349f67950b2SNasf-Fan return (zfs_setattr(vp, (vattr_t *)&xva, flags, cr, ct)); 350f67950b2SNasf-Fan } 351f67950b2SNasf-Fan 352fa9e4066Sahrens /* ARGSUSED */ 353fa9e4066Sahrens static int 354fa9e4066Sahrens zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred, 355da6c28aaSamw int *rvalp, caller_context_t *ct) 356fa9e4066Sahrens { 357fa9e4066Sahrens offset_t off; 3582bcf0248SMax Grossman offset_t ndata; 3592bcf0248SMax Grossman dmu_object_info_t doi; 360fa9e4066Sahrens int error; 361fa9e4066Sahrens zfsvfs_t *zfsvfs; 362f18faf3fSek znode_t *zp; 363fa9e4066Sahrens 364fa9e4066Sahrens switch (com) { 365ecb72030Sperrin case _FIOFFS: 3662bcf0248SMax Grossman { 367fa9e4066Sahrens return (zfs_sync(vp->v_vfsp, 0, cred)); 368fa9e4066Sahrens 369ea8dc4b6Seschrock /* 370ea8dc4b6Seschrock * The following two ioctls are used by bfu. Faking out, 371ea8dc4b6Seschrock * necessary to avoid bfu errors. 372ea8dc4b6Seschrock */ 3732bcf0248SMax Grossman } 374ecb72030Sperrin case _FIOGDIO: 375ecb72030Sperrin case _FIOSDIO: 3762bcf0248SMax Grossman { 377ea8dc4b6Seschrock return (0); 3782bcf0248SMax Grossman } 379ea8dc4b6Seschrock 380aaa9aa59SJerry Jelinek case _FIODIRECTIO: 381aaa9aa59SJerry Jelinek { 382aaa9aa59SJerry Jelinek /* 383aaa9aa59SJerry Jelinek * ZFS inherently provides the basic semantics for directio. 384aaa9aa59SJerry Jelinek * This is the summary from the ZFS on Linux support for 385aaa9aa59SJerry Jelinek * O_DIRECT, which is the common form of directio, and required 386aaa9aa59SJerry Jelinek * no changes to ZFS. 387aaa9aa59SJerry Jelinek * 388aaa9aa59SJerry Jelinek * 1. Minimize cache effects of the I/O. 389aaa9aa59SJerry Jelinek * 390aaa9aa59SJerry Jelinek * By design the ARC is already scan-resistant, which helps 391aaa9aa59SJerry Jelinek * mitigate the need for special O_DIRECT handling. 392aaa9aa59SJerry Jelinek * 393aaa9aa59SJerry Jelinek * 2. O_DIRECT _MAY_ impose restrictions on IO alignment and 394aaa9aa59SJerry Jelinek * length. 395aaa9aa59SJerry Jelinek * 396aaa9aa59SJerry Jelinek * No additional alignment or length restrictions are 397aaa9aa59SJerry Jelinek * imposed by ZFS. 398aaa9aa59SJerry Jelinek * 399aaa9aa59SJerry Jelinek * 3. O_DIRECT _MAY_ perform unbuffered IO operations directly 400aaa9aa59SJerry Jelinek * between user memory and block device. 401aaa9aa59SJerry Jelinek * 402aaa9aa59SJerry Jelinek * No unbuffered IO operations are currently supported. In 403aaa9aa59SJerry Jelinek * order to support features such as compression, encryption, 404aaa9aa59SJerry Jelinek * and checksumming a copy must be made to transform the 405aaa9aa59SJerry Jelinek * data. 406aaa9aa59SJerry Jelinek * 407aaa9aa59SJerry Jelinek * 4. O_DIRECT _MAY_ imply O_DSYNC (XFS). 408aaa9aa59SJerry Jelinek * 409aaa9aa59SJerry Jelinek * O_DIRECT does not imply O_DSYNC for ZFS. 410aaa9aa59SJerry Jelinek * 411aaa9aa59SJerry Jelinek * 5. O_DIRECT _MAY_ disable file locking that serializes IO 412aaa9aa59SJerry Jelinek * operations. 413aaa9aa59SJerry Jelinek * 414aaa9aa59SJerry Jelinek * All I/O in ZFS is locked for correctness and this locking 415aaa9aa59SJerry Jelinek * is not disabled by O_DIRECT. 416aaa9aa59SJerry Jelinek */ 417aaa9aa59SJerry Jelinek return (0); 418aaa9aa59SJerry Jelinek } 419aaa9aa59SJerry Jelinek 420ecb72030Sperrin case _FIO_SEEK_DATA: 421ecb72030Sperrin case _FIO_SEEK_HOLE: 4222bcf0248SMax Grossman { 423fa9e4066Sahrens if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 424be6fd75aSMatthew Ahrens return (SET_ERROR(EFAULT)); 425fa9e4066Sahrens 426f18faf3fSek zp = VTOZ(vp); 427f18faf3fSek zfsvfs = zp->z_zfsvfs; 4283cb34c60Sahrens ZFS_ENTER(zfsvfs); 4293cb34c60Sahrens ZFS_VERIFY_ZP(zp); 430fa9e4066Sahrens 431fa9e4066Sahrens /* offset parameter is in/out */ 432fa9e4066Sahrens error = zfs_holey(vp, com, &off); 433fa9e4066Sahrens ZFS_EXIT(zfsvfs); 434fa9e4066Sahrens if (error) 435fa9e4066Sahrens return (error); 436fa9e4066Sahrens if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 437be6fd75aSMatthew Ahrens return (SET_ERROR(EFAULT)); 438fa9e4066Sahrens return (0); 439fa9e4066Sahrens } 4402bcf0248SMax Grossman case _FIO_COUNT_FILLED: 4412bcf0248SMax Grossman { 4422bcf0248SMax Grossman /* 4432bcf0248SMax Grossman * _FIO_COUNT_FILLED adds a new ioctl command which 4442bcf0248SMax Grossman * exposes the number of filled blocks in a 4452bcf0248SMax Grossman * ZFS object. 4462bcf0248SMax Grossman */ 4472bcf0248SMax Grossman zp = VTOZ(vp); 4482bcf0248SMax Grossman zfsvfs = zp->z_zfsvfs; 4492bcf0248SMax Grossman ZFS_ENTER(zfsvfs); 4502bcf0248SMax Grossman ZFS_VERIFY_ZP(zp); 4512bcf0248SMax Grossman 4522bcf0248SMax Grossman /* 4532bcf0248SMax Grossman * Wait for all dirty blocks for this object 4542bcf0248SMax Grossman * to get synced out to disk, and the DMU info 4552bcf0248SMax Grossman * updated. 4562bcf0248SMax Grossman */ 4572bcf0248SMax Grossman error = dmu_object_wait_synced(zfsvfs->z_os, zp->z_id); 4582bcf0248SMax Grossman if (error) { 4592bcf0248SMax Grossman ZFS_EXIT(zfsvfs); 4602bcf0248SMax Grossman return (error); 4612bcf0248SMax Grossman } 4622bcf0248SMax Grossman 4632bcf0248SMax Grossman /* 4642bcf0248SMax Grossman * Retrieve fill count from DMU object. 4652bcf0248SMax Grossman */ 4662bcf0248SMax Grossman error = dmu_object_info(zfsvfs->z_os, zp->z_id, &doi); 4672bcf0248SMax Grossman if (error) { 4682bcf0248SMax Grossman ZFS_EXIT(zfsvfs); 4692bcf0248SMax Grossman return (error); 4702bcf0248SMax Grossman } 4712bcf0248SMax Grossman 4722bcf0248SMax Grossman ndata = doi.doi_fill_count; 4732bcf0248SMax Grossman 4742bcf0248SMax Grossman ZFS_EXIT(zfsvfs); 4752bcf0248SMax Grossman if (ddi_copyout(&ndata, (void *)data, sizeof (ndata), flag)) 4762bcf0248SMax Grossman return (SET_ERROR(EFAULT)); 4772bcf0248SMax Grossman return (0); 4782bcf0248SMax Grossman } 479f67950b2SNasf-Fan case ZFS_IOC_FSGETXATTR: 480f67950b2SNasf-Fan return (zfs_ioctl_getxattr(vp, data, flag, cred, ct)); 481f67950b2SNasf-Fan case ZFS_IOC_FSSETXATTR: 482f67950b2SNasf-Fan return (zfs_ioctl_setxattr(vp, data, flag, cred, ct)); 4832bcf0248SMax Grossman } 484be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTTY)); 485fa9e4066Sahrens } 486fa9e4066Sahrens 4870fab61baSJonathan W Adams /* 4880fab61baSJonathan W Adams * Utility functions to map and unmap a single physical page. These 4890fab61baSJonathan W Adams * are used to manage the mappable copies of ZFS file data, and therefore 4900fab61baSJonathan W Adams * do not update ref/mod bits. 4910fab61baSJonathan W Adams */ 4920fab61baSJonathan W Adams caddr_t 4930fab61baSJonathan W Adams zfs_map_page(page_t *pp, enum seg_rw rw) 4940fab61baSJonathan W Adams { 4950fab61baSJonathan W Adams if (kpm_enable) 4960fab61baSJonathan W Adams return (hat_kpm_mapin(pp, 0)); 4970fab61baSJonathan W Adams ASSERT(rw == S_READ || rw == S_WRITE); 4980fab61baSJonathan W Adams return (ppmapin(pp, PROT_READ | ((rw == S_WRITE) ? PROT_WRITE : 0), 4990fab61baSJonathan W Adams (caddr_t)-1)); 5000fab61baSJonathan W Adams } 5010fab61baSJonathan W Adams 5020fab61baSJonathan W Adams void 5030fab61baSJonathan W Adams zfs_unmap_page(page_t *pp, caddr_t addr) 5040fab61baSJonathan W Adams { 5050fab61baSJonathan W Adams if (kpm_enable) { 5060fab61baSJonathan W Adams hat_kpm_mapout(pp, 0, addr); 5070fab61baSJonathan W Adams } else { 5080fab61baSJonathan W Adams ppmapout(addr); 5090fab61baSJonathan W Adams } 5100fab61baSJonathan W Adams } 5110fab61baSJonathan W Adams 512fa9e4066Sahrens /* 513fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 514fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 515fa9e4066Sahrens * 516fa9e4066Sahrens * On Write: If we find a memory mapped page, we write to *both* 517fa9e4066Sahrens * the page and the dmu buffer. 518fa9e4066Sahrens */ 519ac05c741SMark Maybee static void 520ac05c741SMark Maybee update_pages(vnode_t *vp, int64_t start, int len, objset_t *os, uint64_t oid) 521fa9e4066Sahrens { 522ac05c741SMark Maybee int64_t off; 523fa9e4066Sahrens 524fa9e4066Sahrens off = start & PAGEOFFSET; 525fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 526fa9e4066Sahrens page_t *pp; 527ac05c741SMark Maybee uint64_t nbytes = MIN(PAGESIZE - off, len); 528fa9e4066Sahrens 529fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 530fa9e4066Sahrens caddr_t va; 531fa9e4066Sahrens 5320fab61baSJonathan W Adams va = zfs_map_page(pp, S_WRITE); 5337bfdf011SNeil Perrin (void) dmu_read(os, oid, start+off, nbytes, va+off, 5347bfdf011SNeil Perrin DMU_READ_PREFETCH); 5350fab61baSJonathan W Adams zfs_unmap_page(pp, va); 536fa9e4066Sahrens page_unlock(pp); 537fa9e4066Sahrens } 538ac05c741SMark Maybee len -= nbytes; 539fa9e4066Sahrens off = 0; 540fa9e4066Sahrens } 541fa9e4066Sahrens } 542fa9e4066Sahrens 543fa9e4066Sahrens /* 544fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 545fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 546fa9e4066Sahrens * 547fa9e4066Sahrens * On Read: We "read" preferentially from memory mapped pages, 548fa9e4066Sahrens * else we default from the dmu buffer. 549fa9e4066Sahrens * 550fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 551f7170741SWill Andrews * the file is memory mapped. 552fa9e4066Sahrens */ 553fa9e4066Sahrens static int 554feb08c6bSbillm mappedread(vnode_t *vp, int nbytes, uio_t *uio) 555fa9e4066Sahrens { 556feb08c6bSbillm znode_t *zp = VTOZ(vp); 557feb08c6bSbillm int64_t start, off; 558fa9e4066Sahrens int len = nbytes; 559fa9e4066Sahrens int error = 0; 560fa9e4066Sahrens 561fa9e4066Sahrens start = uio->uio_loffset; 562fa9e4066Sahrens off = start & PAGEOFFSET; 563fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 564fa9e4066Sahrens page_t *pp; 565feb08c6bSbillm uint64_t bytes = MIN(PAGESIZE - off, len); 566fa9e4066Sahrens 567fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 568fa9e4066Sahrens caddr_t va; 569fa9e4066Sahrens 5700fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 571fa9e4066Sahrens error = uiomove(va + off, bytes, UIO_READ, uio); 5720fab61baSJonathan W Adams zfs_unmap_page(pp, va); 573fa9e4066Sahrens page_unlock(pp); 574fa9e4066Sahrens } else { 575f8554bb9SMatthew Ahrens error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl), 576f8554bb9SMatthew Ahrens uio, bytes); 577fa9e4066Sahrens } 578fa9e4066Sahrens len -= bytes; 579fa9e4066Sahrens off = 0; 580fa9e4066Sahrens if (error) 581fa9e4066Sahrens break; 582fa9e4066Sahrens } 583fa9e4066Sahrens return (error); 584fa9e4066Sahrens } 585fa9e4066Sahrens 586feb08c6bSbillm offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 587fa9e4066Sahrens 588fa9e4066Sahrens /* 589fa9e4066Sahrens * Read bytes from specified file into supplied buffer. 590fa9e4066Sahrens * 591fa9e4066Sahrens * IN: vp - vnode of file to be read from. 592fa9e4066Sahrens * uio - structure supplying read location, range info, 593fa9e4066Sahrens * and return buffer. 594fa9e4066Sahrens * ioflag - SYNC flags; used to provide FRSYNC semantics. 595fa9e4066Sahrens * cr - credentials of caller. 596da6c28aaSamw * ct - caller context 597fa9e4066Sahrens * 598fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 599fa9e4066Sahrens * 600f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 601fa9e4066Sahrens * 602fa9e4066Sahrens * Side Effects: 603fa9e4066Sahrens * vp - atime updated if byte count > 0 604fa9e4066Sahrens */ 605fa9e4066Sahrens /* ARGSUSED */ 606fa9e4066Sahrens static int 607fa9e4066Sahrens zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 608fa9e4066Sahrens { 609fa9e4066Sahrens znode_t *zp = VTOZ(vp); 610fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 611feb08c6bSbillm ssize_t n, nbytes; 612d5285caeSGeorge Wilson int error = 0; 613da7753c4SGeorge Wilson boolean_t frsync = B_FALSE; 614c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_t *xuio = NULL; 615fa9e4066Sahrens 6163cb34c60Sahrens ZFS_ENTER(zfsvfs); 6173cb34c60Sahrens ZFS_VERIFY_ZP(zp); 618fa9e4066Sahrens 6190a586ceaSMark Shellenbaum if (zp->z_pflags & ZFS_AV_QUARANTINED) { 6200616c50eSmarks ZFS_EXIT(zfsvfs); 621be6fd75aSMatthew Ahrens return (SET_ERROR(EACCES)); 6220616c50eSmarks } 6230616c50eSmarks 624fa9e4066Sahrens /* 625fa9e4066Sahrens * Validate file offset 626fa9e4066Sahrens */ 627fa9e4066Sahrens if (uio->uio_loffset < (offset_t)0) { 628fa9e4066Sahrens ZFS_EXIT(zfsvfs); 629be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 630fa9e4066Sahrens } 631fa9e4066Sahrens 632fa9e4066Sahrens /* 633fa9e4066Sahrens * Fasttrack empty reads 634fa9e4066Sahrens */ 635fa9e4066Sahrens if (uio->uio_resid == 0) { 636fa9e4066Sahrens ZFS_EXIT(zfsvfs); 637fa9e4066Sahrens return (0); 638fa9e4066Sahrens } 639fa9e4066Sahrens 640fa9e4066Sahrens /* 641104e2ed7Sperrin * Check for mandatory locks 642fa9e4066Sahrens */ 6430a586ceaSMark Shellenbaum if (MANDMODE(zp->z_mode)) { 644fa9e4066Sahrens if (error = chklock(vp, FREAD, 645fa9e4066Sahrens uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 646fa9e4066Sahrens ZFS_EXIT(zfsvfs); 647fa9e4066Sahrens return (error); 648fa9e4066Sahrens } 649fa9e4066Sahrens } 650fa9e4066Sahrens 651da7753c4SGeorge Wilson #ifdef FRSYNC 652fa9e4066Sahrens /* 653fa9e4066Sahrens * If we're in FRSYNC mode, sync out this znode before reading it. 654da7753c4SGeorge Wilson * Only do this for non-snapshots. 655da7753c4SGeorge Wilson * 656da7753c4SGeorge Wilson * Some platforms do not support FRSYNC and instead map it 657da7753c4SGeorge Wilson * to FSYNC, which results in unnecessary calls to zil_commit. We 658da7753c4SGeorge Wilson * only honor FRSYNC requests on platforms which support it. 659fa9e4066Sahrens */ 660da7753c4SGeorge Wilson frsync = !!(ioflag & FRSYNC); 661da7753c4SGeorge Wilson #endif 662da7753c4SGeorge Wilson 663da7753c4SGeorge Wilson if (zfsvfs->z_log && 664da7753c4SGeorge Wilson (frsync || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS)) 6655002558fSNeil Perrin zil_commit(zfsvfs->z_log, zp->z_id); 666fa9e4066Sahrens 667fa9e4066Sahrens /* 668104e2ed7Sperrin * Lock the range against changes. 669fa9e4066Sahrens */ 67079315247SMatthew Ahrens locked_range_t *lr = rangelock_enter(&zp->z_rangelock, 67179315247SMatthew Ahrens uio->uio_loffset, uio->uio_resid, RL_READER); 672104e2ed7Sperrin 673fa9e4066Sahrens /* 674fa9e4066Sahrens * If we are reading past end-of-file we can skip 675fa9e4066Sahrens * to the end; but we might still need to set atime. 676fa9e4066Sahrens */ 6770a586ceaSMark Shellenbaum if (uio->uio_loffset >= zp->z_size) { 678fa9e4066Sahrens error = 0; 679fa9e4066Sahrens goto out; 680fa9e4066Sahrens } 681fa9e4066Sahrens 6820a586ceaSMark Shellenbaum ASSERT(uio->uio_loffset < zp->z_size); 6830a586ceaSMark Shellenbaum n = MIN(uio->uio_resid, zp->z_size - uio->uio_loffset); 684feb08c6bSbillm 685c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if ((uio->uio_extflg == UIO_XUIO) && 686c242f9a0Schunli zhang - Sun Microsystems - Irvine United States (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) { 687c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int nblk; 688c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int blksz = zp->z_blksz; 689c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uint64_t offset = uio->uio_loffset; 690c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 691c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio = (xuio_t *)uio; 692c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if ((ISP2(blksz))) { 693c242f9a0Schunli zhang - Sun Microsystems - Irvine United States nblk = (P2ROUNDUP(offset + n, blksz) - P2ALIGN(offset, 694c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz)) / blksz; 695c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 696c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(offset + n <= blksz); 697c242f9a0Schunli zhang - Sun Microsystems - Irvine United States nblk = 1; 698c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 699570de38fSSurya Prakki (void) dmu_xuio_init(xuio, nblk); 700c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 701c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (vn_has_cached_data(vp)) { 702c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 703c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * For simplicity, we always allocate a full buffer 704c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * even if we only expect to read a portion of a block. 705c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 706c242f9a0Schunli zhang - Sun Microsystems - Irvine United States while (--nblk >= 0) { 707570de38fSSurya Prakki (void) dmu_xuio_add(xuio, 7080a586ceaSMark Shellenbaum dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 7090a586ceaSMark Shellenbaum blksz), 0, blksz); 710c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 711c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 712c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 713c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 714feb08c6bSbillm while (n > 0) { 715feb08c6bSbillm nbytes = MIN(n, zfs_read_chunk_size - 716feb08c6bSbillm P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); 717fa9e4066Sahrens 718f8554bb9SMatthew Ahrens if (vn_has_cached_data(vp)) { 719feb08c6bSbillm error = mappedread(vp, nbytes, uio); 720f8554bb9SMatthew Ahrens } else { 721f8554bb9SMatthew Ahrens error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl), 722f8554bb9SMatthew Ahrens uio, nbytes); 723f8554bb9SMatthew Ahrens } 724b87f3af3Sperrin if (error) { 725b87f3af3Sperrin /* convert checksum errors into IO errors */ 726b87f3af3Sperrin if (error == ECKSUM) 727be6fd75aSMatthew Ahrens error = SET_ERROR(EIO); 728feb08c6bSbillm break; 729b87f3af3Sperrin } 730fa9e4066Sahrens 731feb08c6bSbillm n -= nbytes; 732fa9e4066Sahrens } 733fa9e4066Sahrens out: 73479315247SMatthew Ahrens rangelock_exit(lr); 735fa9e4066Sahrens 736fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 737fa9e4066Sahrens ZFS_EXIT(zfsvfs); 738fa9e4066Sahrens return (error); 739fa9e4066Sahrens } 740fa9e4066Sahrens 741fa9e4066Sahrens /* 742fa9e4066Sahrens * Write the bytes to a file. 743fa9e4066Sahrens * 744fa9e4066Sahrens * IN: vp - vnode of file to be written to. 745fa9e4066Sahrens * uio - structure supplying write location, range info, 746fa9e4066Sahrens * and data buffer. 747f7170741SWill Andrews * ioflag - FAPPEND, FSYNC, and/or FDSYNC. FAPPEND is 748f7170741SWill Andrews * set if in append mode. 749fa9e4066Sahrens * cr - credentials of caller. 750da6c28aaSamw * ct - caller context (NFS/CIFS fem monitor only) 751fa9e4066Sahrens * 752fa9e4066Sahrens * OUT: uio - updated offset and range. 753fa9e4066Sahrens * 754f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 755fa9e4066Sahrens * 756fa9e4066Sahrens * Timestamps: 757fa9e4066Sahrens * vp - ctime|mtime updated if byte count > 0 758fa9e4066Sahrens */ 7590a586ceaSMark Shellenbaum 760fa9e4066Sahrens /* ARGSUSED */ 761fa9e4066Sahrens static int 762fa9e4066Sahrens zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 763fa9e4066Sahrens { 764fa9e4066Sahrens znode_t *zp = VTOZ(vp); 765fa9e4066Sahrens rlim64_t limit = uio->uio_llimit; 766fa9e4066Sahrens ssize_t start_resid = uio->uio_resid; 767fa9e4066Sahrens ssize_t tx_bytes; 768fa9e4066Sahrens uint64_t end_size; 769fa9e4066Sahrens dmu_tx_t *tx; 770fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 771f18faf3fSek zilog_t *zilog; 772fa9e4066Sahrens offset_t woff; 773fa9e4066Sahrens ssize_t n, nbytes; 774fa9e4066Sahrens int max_blksz = zfsvfs->z_max_blksz; 775d5285caeSGeorge Wilson int error = 0; 776b0ef4256SJerry Jelinek int prev_error; 7772fdbea25SAleksandr Guzovskiy arc_buf_t *abuf; 778d5285caeSGeorge Wilson iovec_t *aiov = NULL; 779c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_t *xuio = NULL; 780c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int i_iov = 0; 781c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int iovcnt = uio->uio_iovcnt; 782c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iovec_t *iovp = uio->uio_iov; 783c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int write_eof; 7840a586ceaSMark Shellenbaum int count = 0; 7850a586ceaSMark Shellenbaum sa_bulk_attr_t bulk[4]; 7860a586ceaSMark Shellenbaum uint64_t mtime[2], ctime[2]; 787fa9e4066Sahrens 788fa9e4066Sahrens /* 789fa9e4066Sahrens * Fasttrack empty write 790fa9e4066Sahrens */ 791104e2ed7Sperrin n = start_resid; 792fa9e4066Sahrens if (n == 0) 793fa9e4066Sahrens return (0); 794fa9e4066Sahrens 795104e2ed7Sperrin if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 796104e2ed7Sperrin limit = MAXOFFSET_T; 797104e2ed7Sperrin 7983cb34c60Sahrens ZFS_ENTER(zfsvfs); 7993cb34c60Sahrens ZFS_VERIFY_ZP(zp); 800c09193bfSmarks 8010a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 8020a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 8030a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zfsvfs), NULL, 8040a586ceaSMark Shellenbaum &zp->z_size, 8); 8050a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, 8060a586ceaSMark Shellenbaum &zp->z_pflags, 8); 8070a586ceaSMark Shellenbaum 8082144b121SMarcel Telka /* 8092144b121SMarcel Telka * In a case vp->v_vfsp != zp->z_zfsvfs->z_vfs (e.g. snapshots) our 8102144b121SMarcel Telka * callers might not be able to detect properly that we are read-only, 8112144b121SMarcel Telka * so check it explicitly here. 8122144b121SMarcel Telka */ 8132144b121SMarcel Telka if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 8142144b121SMarcel Telka ZFS_EXIT(zfsvfs); 8152144b121SMarcel Telka return (SET_ERROR(EROFS)); 8162144b121SMarcel Telka } 8172144b121SMarcel Telka 818c09193bfSmarks /* 8192889ec41SGordon Ross * If immutable or not appending then return EPERM. 8202889ec41SGordon Ross * Intentionally allow ZFS_READONLY through here. 8212889ec41SGordon Ross * See zfs_zaccess_common() 822c09193bfSmarks */ 8232889ec41SGordon Ross if ((zp->z_pflags & ZFS_IMMUTABLE) || 8240a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) && 8250a586ceaSMark Shellenbaum (uio->uio_loffset < zp->z_size))) { 826c09193bfSmarks ZFS_EXIT(zfsvfs); 827be6fd75aSMatthew Ahrens return (SET_ERROR(EPERM)); 828c09193bfSmarks } 829c09193bfSmarks 830f18faf3fSek zilog = zfsvfs->z_log; 831fa9e4066Sahrens 83241865f27SWilliam Gorrell /* 83341865f27SWilliam Gorrell * Validate file offset 83441865f27SWilliam Gorrell */ 8350a586ceaSMark Shellenbaum woff = ioflag & FAPPEND ? zp->z_size : uio->uio_loffset; 83641865f27SWilliam Gorrell if (woff < 0) { 83741865f27SWilliam Gorrell ZFS_EXIT(zfsvfs); 838be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 83941865f27SWilliam Gorrell } 84041865f27SWilliam Gorrell 84141865f27SWilliam Gorrell /* 84279315247SMatthew Ahrens * Check for mandatory locks before calling rangelock_enter() 84341865f27SWilliam Gorrell * in order to prevent a deadlock with locks set via fcntl(). 84441865f27SWilliam Gorrell */ 8450a586ceaSMark Shellenbaum if (MANDMODE((mode_t)zp->z_mode) && 84641865f27SWilliam Gorrell (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 84741865f27SWilliam Gorrell ZFS_EXIT(zfsvfs); 84841865f27SWilliam Gorrell return (error); 84941865f27SWilliam Gorrell } 85041865f27SWilliam Gorrell 851fa9e4066Sahrens /* 852c5c6ffa0Smaybee * Pre-fault the pages to ensure slow (eg NFS) pages 853104e2ed7Sperrin * don't hold up txg. 854c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Skip this if uio contains loaned arc_buf. 855fa9e4066Sahrens */ 856c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if ((uio->uio_extflg == UIO_XUIO) && 857c242f9a0Schunli zhang - Sun Microsystems - Irvine United States (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) 858c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio = (xuio_t *)uio; 859c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 860ff866947SSanjeev Bagewadi uio_prefaultpages(MIN(n, max_blksz), uio); 861fa9e4066Sahrens 862fa9e4066Sahrens /* 863fa9e4066Sahrens * If in append mode, set the io offset pointer to eof. 864fa9e4066Sahrens */ 86579315247SMatthew Ahrens locked_range_t *lr; 866104e2ed7Sperrin if (ioflag & FAPPEND) { 867104e2ed7Sperrin /* 86841865f27SWilliam Gorrell * Obtain an appending range lock to guarantee file append 86941865f27SWilliam Gorrell * semantics. We reset the write offset once we have the lock. 870104e2ed7Sperrin */ 87179315247SMatthew Ahrens lr = rangelock_enter(&zp->z_rangelock, 0, n, RL_APPEND); 87279315247SMatthew Ahrens woff = lr->lr_offset; 87379315247SMatthew Ahrens if (lr->lr_length == UINT64_MAX) { 87441865f27SWilliam Gorrell /* 87541865f27SWilliam Gorrell * We overlocked the file because this write will cause 87641865f27SWilliam Gorrell * the file block size to increase. 87741865f27SWilliam Gorrell * Note that zp_size cannot change with this lock held. 87841865f27SWilliam Gorrell */ 8790a586ceaSMark Shellenbaum woff = zp->z_size; 880104e2ed7Sperrin } 88141865f27SWilliam Gorrell uio->uio_loffset = woff; 882fa9e4066Sahrens } else { 883fa9e4066Sahrens /* 88441865f27SWilliam Gorrell * Note that if the file block size will change as a result of 88541865f27SWilliam Gorrell * this write, then this range lock will lock the entire file 88641865f27SWilliam Gorrell * so that we can re-write the block safely. 887fa9e4066Sahrens */ 88879315247SMatthew Ahrens lr = rangelock_enter(&zp->z_rangelock, woff, n, RL_WRITER); 889fa9e4066Sahrens } 890fa9e4066Sahrens 891fa9e4066Sahrens if (woff >= limit) { 89279315247SMatthew Ahrens rangelock_exit(lr); 893feb08c6bSbillm ZFS_EXIT(zfsvfs); 894be6fd75aSMatthew Ahrens return (SET_ERROR(EFBIG)); 895fa9e4066Sahrens } 896fa9e4066Sahrens 897fa9e4066Sahrens if ((woff + n) > limit || woff > (limit - n)) 898fa9e4066Sahrens n = limit - woff; 899fa9e4066Sahrens 900c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* Will this write extend the file length? */ 9010a586ceaSMark Shellenbaum write_eof = (woff + n > zp->z_size); 902c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 9030a586ceaSMark Shellenbaum end_size = MAX(zp->z_size, woff + n); 904fa9e4066Sahrens 905104e2ed7Sperrin /* 906feb08c6bSbillm * Write the file in reasonable size chunks. Each chunk is written 907feb08c6bSbillm * in a separate transaction; this keeps the intent log records small 908feb08c6bSbillm * and allows us to do more fine-grained space accounting. 909104e2ed7Sperrin */ 910feb08c6bSbillm while (n > 0) { 9112fdbea25SAleksandr Guzovskiy woff = uio->uio_loffset; 912f67950b2SNasf-Fan 913f67950b2SNasf-Fan if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT, 914f67950b2SNasf-Fan zp->z_uid) || 915f67950b2SNasf-Fan zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT, 916f67950b2SNasf-Fan zp->z_gid) || 917f67950b2SNasf-Fan (zp->z_projid != ZFS_DEFAULT_PROJID && 918f67950b2SNasf-Fan zfs_id_overblockquota(zfsvfs, DMU_PROJECTUSED_OBJECT, 919f67950b2SNasf-Fan zp->z_projid))) { 920be6fd75aSMatthew Ahrens error = SET_ERROR(EDQUOT); 92114843421SMatthew Ahrens break; 92214843421SMatthew Ahrens } 9232fdbea25SAleksandr Guzovskiy 924f67950b2SNasf-Fan arc_buf_t *abuf = NULL; 925f67950b2SNasf-Fan if (xuio) { 926c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i_iov < iovcnt); 927c242f9a0Schunli zhang - Sun Microsystems - Irvine United States aiov = &iovp[i_iov]; 928c242f9a0Schunli zhang - Sun Microsystems - Irvine United States abuf = dmu_xuio_arcbuf(xuio, i_iov); 929c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_clear(xuio, i_iov); 930c242f9a0Schunli zhang - Sun Microsystems - Irvine United States DTRACE_PROBE3(zfs_cp_write, int, i_iov, 931c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iovec_t *, aiov, arc_buf_t *, abuf); 932c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT((aiov->iov_base == abuf->b_data) || 933c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ((char *)aiov->iov_base - (char *)abuf->b_data + 934c242f9a0Schunli zhang - Sun Microsystems - Irvine United States aiov->iov_len == arc_buf_size(abuf))); 935c242f9a0Schunli zhang - Sun Microsystems - Irvine United States i_iov++; 936f67950b2SNasf-Fan } else if (n >= max_blksz && woff >= zp->z_size && 9372fdbea25SAleksandr Guzovskiy P2PHASE(woff, max_blksz) == 0 && 9382fdbea25SAleksandr Guzovskiy zp->z_blksz == max_blksz) { 939c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 940c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * This write covers a full block. "Borrow" a buffer 941c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * from the dmu so that we can fill it before we enter 942c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * a transaction. This avoids the possibility of 943c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * holding up the transaction if the data copy hangs 944c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * up on a pagefault (e.g., from an NFS server mapping). 945c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 9462fdbea25SAleksandr Guzovskiy size_t cbytes; 9472fdbea25SAleksandr Guzovskiy 9480a586ceaSMark Shellenbaum abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 9490a586ceaSMark Shellenbaum max_blksz); 9502fdbea25SAleksandr Guzovskiy ASSERT(abuf != NULL); 9512fdbea25SAleksandr Guzovskiy ASSERT(arc_buf_size(abuf) == max_blksz); 9522fdbea25SAleksandr Guzovskiy if (error = uiocopy(abuf->b_data, max_blksz, 9532fdbea25SAleksandr Guzovskiy UIO_WRITE, uio, &cbytes)) { 9542fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(abuf); 9552fdbea25SAleksandr Guzovskiy break; 9562fdbea25SAleksandr Guzovskiy } 9572fdbea25SAleksandr Guzovskiy ASSERT(cbytes == max_blksz); 9582fdbea25SAleksandr Guzovskiy } 9592fdbea25SAleksandr Guzovskiy 9602fdbea25SAleksandr Guzovskiy /* 9612fdbea25SAleksandr Guzovskiy * Start a transaction. 9622fdbea25SAleksandr Guzovskiy */ 963feb08c6bSbillm tx = dmu_tx_create(zfsvfs->z_os); 9640a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 965feb08c6bSbillm dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 9660a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, zp); 967e722410cSMatthew Ahrens error = dmu_tx_assign(tx, TXG_WAIT); 968feb08c6bSbillm if (error) { 969feb08c6bSbillm dmu_tx_abort(tx); 9702fdbea25SAleksandr Guzovskiy if (abuf != NULL) 9712fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(abuf); 972feb08c6bSbillm break; 973feb08c6bSbillm } 974104e2ed7Sperrin 975feb08c6bSbillm /* 97679315247SMatthew Ahrens * If rangelock_enter() over-locked we grow the blocksize 977feb08c6bSbillm * and then reduce the lock range. This will only happen 97879315247SMatthew Ahrens * on the first iteration since rangelock_reduce() will 97979315247SMatthew Ahrens * shrink down lr_length to the appropriate size. 980feb08c6bSbillm */ 98179315247SMatthew Ahrens if (lr->lr_length == UINT64_MAX) { 982feb08c6bSbillm uint64_t new_blksz; 983feb08c6bSbillm 984feb08c6bSbillm if (zp->z_blksz > max_blksz) { 985b5152584SMatthew Ahrens /* 986b5152584SMatthew Ahrens * File's blocksize is already larger than the 987b5152584SMatthew Ahrens * "recordsize" property. Only let it grow to 988b5152584SMatthew Ahrens * the next power of 2. 989b5152584SMatthew Ahrens */ 990feb08c6bSbillm ASSERT(!ISP2(zp->z_blksz)); 991b5152584SMatthew Ahrens new_blksz = MIN(end_size, 992b5152584SMatthew Ahrens 1 << highbit64(zp->z_blksz)); 993feb08c6bSbillm } else { 994feb08c6bSbillm new_blksz = MIN(end_size, max_blksz); 995feb08c6bSbillm } 996feb08c6bSbillm zfs_grow_blocksize(zp, new_blksz, tx); 99779315247SMatthew Ahrens rangelock_reduce(lr, woff, n); 998fa9e4066Sahrens } 999fa9e4066Sahrens 1000fa9e4066Sahrens /* 1001fa9e4066Sahrens * XXX - should we really limit each write to z_max_blksz? 1002fa9e4066Sahrens * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 1003fa9e4066Sahrens */ 1004fa9e4066Sahrens nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 1005fa9e4066Sahrens 10062fdbea25SAleksandr Guzovskiy if (abuf == NULL) { 10072fdbea25SAleksandr Guzovskiy tx_bytes = uio->uio_resid; 100894d1a210STim Haley error = dmu_write_uio_dbuf(sa_get_db(zp->z_sa_hdl), 100994d1a210STim Haley uio, nbytes, tx); 10102fdbea25SAleksandr Guzovskiy tx_bytes -= uio->uio_resid; 10112fdbea25SAleksandr Guzovskiy } else { 10122fdbea25SAleksandr Guzovskiy tx_bytes = nbytes; 1013c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(xuio == NULL || tx_bytes == aiov->iov_len); 1014c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 1015c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * If this is not a full block write, but we are 1016c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * extending the file past EOF and this data starts 1017c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * block-aligned, use assign_arcbuf(). Otherwise, 1018c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * write via dmu_write(). 1019c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 1020c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (tx_bytes < max_blksz && (!write_eof || 1021c242f9a0Schunli zhang - Sun Microsystems - Irvine United States aiov->iov_base != abuf->b_data)) { 1022c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(xuio); 1023c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_write(zfsvfs->z_os, zp->z_id, woff, 1024c242f9a0Schunli zhang - Sun Microsystems - Irvine United States aiov->iov_len, aiov->iov_base, tx); 1025c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_return_arcbuf(abuf); 1026c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_copied(); 1027c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 1028c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(xuio || tx_bytes == max_blksz); 1029eb633035STom Caputi dmu_assign_arcbuf_by_dbuf( 1030eb633035STom Caputi sa_get_db(zp->z_sa_hdl), woff, abuf, tx); 1031c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 10322fdbea25SAleksandr Guzovskiy ASSERT(tx_bytes <= uio->uio_resid); 10332fdbea25SAleksandr Guzovskiy uioskip(uio, tx_bytes); 10342fdbea25SAleksandr Guzovskiy } 10352fdbea25SAleksandr Guzovskiy if (tx_bytes && vn_has_cached_data(vp)) { 1036ac05c741SMark Maybee update_pages(vp, woff, 1037ac05c741SMark Maybee tx_bytes, zfsvfs->z_os, zp->z_id); 10382fdbea25SAleksandr Guzovskiy } 1039fa9e4066Sahrens 1040feb08c6bSbillm /* 1041feb08c6bSbillm * If we made no progress, we're done. If we made even 1042feb08c6bSbillm * partial progress, update the znode and ZIL accordingly. 1043feb08c6bSbillm */ 1044feb08c6bSbillm if (tx_bytes == 0) { 10450a586ceaSMark Shellenbaum (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs), 10460a586ceaSMark Shellenbaum (void *)&zp->z_size, sizeof (uint64_t), tx); 1047af2c4821Smaybee dmu_tx_commit(tx); 1048feb08c6bSbillm ASSERT(error != 0); 1049fa9e4066Sahrens break; 1050fa9e4066Sahrens } 1051fa9e4066Sahrens 1052169cdae2Smarks /* 1053169cdae2Smarks * Clear Set-UID/Set-GID bits on successful write if not 1054169cdae2Smarks * privileged and at least one of the excute bits is set. 1055169cdae2Smarks * 1056169cdae2Smarks * It would be nice to to this after all writes have 1057169cdae2Smarks * been done, but that would still expose the ISUID/ISGID 1058169cdae2Smarks * to another app after the partial write is committed. 1059da6c28aaSamw * 1060f1696b23SMark Shellenbaum * Note: we don't call zfs_fuid_map_id() here because 1061f1696b23SMark Shellenbaum * user 0 is not an ephemeral uid. 1062169cdae2Smarks */ 1063169cdae2Smarks mutex_enter(&zp->z_acl_lock); 10640a586ceaSMark Shellenbaum if ((zp->z_mode & (S_IXUSR | (S_IXUSR >> 3) | 1065169cdae2Smarks (S_IXUSR >> 6))) != 0 && 10660a586ceaSMark Shellenbaum (zp->z_mode & (S_ISUID | S_ISGID)) != 0 && 1067169cdae2Smarks secpolicy_vnode_setid_retain(cr, 10680a586ceaSMark Shellenbaum (zp->z_mode & S_ISUID) != 0 && zp->z_uid == 0) != 0) { 10690a586ceaSMark Shellenbaum uint64_t newmode; 10700a586ceaSMark Shellenbaum zp->z_mode &= ~(S_ISUID | S_ISGID); 10710a586ceaSMark Shellenbaum newmode = zp->z_mode; 10720a586ceaSMark Shellenbaum (void) sa_update(zp->z_sa_hdl, SA_ZPL_MODE(zfsvfs), 10730a586ceaSMark Shellenbaum (void *)&newmode, sizeof (uint64_t), tx); 1074169cdae2Smarks } 1075169cdae2Smarks mutex_exit(&zp->z_acl_lock); 1076169cdae2Smarks 10770a586ceaSMark Shellenbaum zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, 10780a586ceaSMark Shellenbaum B_TRUE); 1079fa9e4066Sahrens 1080fa9e4066Sahrens /* 1081feb08c6bSbillm * Update the file size (zp_size) if it has changed; 1082feb08c6bSbillm * account for possible concurrent updates. 1083fa9e4066Sahrens */ 10840a586ceaSMark Shellenbaum while ((end_size = zp->z_size) < uio->uio_loffset) { 10850a586ceaSMark Shellenbaum (void) atomic_cas_64(&zp->z_size, end_size, 1086fa9e4066Sahrens uio->uio_loffset); 10870a586ceaSMark Shellenbaum } 1088c0e50c98SNeil Perrin /* 1089c0e50c98SNeil Perrin * If we are replaying and eof is non zero then force 1090c0e50c98SNeil Perrin * the file size to the specified eof. Note, there's no 1091c0e50c98SNeil Perrin * concurrency during replay. 1092c0e50c98SNeil Perrin */ 1093c0e50c98SNeil Perrin if (zfsvfs->z_replay && zfsvfs->z_replay_eof != 0) 1094c0e50c98SNeil Perrin zp->z_size = zfsvfs->z_replay_eof; 1095c0e50c98SNeil Perrin 1096b0ef4256SJerry Jelinek /* 1097b0ef4256SJerry Jelinek * Keep track of a possible pre-existing error from a partial 1098b0ef4256SJerry Jelinek * write via dmu_write_uio_dbuf above. 1099b0ef4256SJerry Jelinek */ 1100b0ef4256SJerry Jelinek prev_error = error; 11010a586ceaSMark Shellenbaum error = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); 11020a586ceaSMark Shellenbaum 1103feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 1104feb08c6bSbillm dmu_tx_commit(tx); 1105fa9e4066Sahrens 1106b0ef4256SJerry Jelinek if (prev_error != 0 || error != 0) 1107feb08c6bSbillm break; 1108feb08c6bSbillm ASSERT(tx_bytes == nbytes); 1109feb08c6bSbillm n -= nbytes; 1110ff866947SSanjeev Bagewadi 1111ff866947SSanjeev Bagewadi if (!xuio && n > 0) 1112ff866947SSanjeev Bagewadi uio_prefaultpages(MIN(n, max_blksz), uio); 1113feb08c6bSbillm } 1114fa9e4066Sahrens 111579315247SMatthew Ahrens rangelock_exit(lr); 1116fa9e4066Sahrens 1117fa9e4066Sahrens /* 1118fa9e4066Sahrens * If we're in replay mode, or we made no progress, return error. 1119fa9e4066Sahrens * Otherwise, it's at least a partial write, so it's successful. 1120fa9e4066Sahrens */ 11211209a471SNeil Perrin if (zfsvfs->z_replay || uio->uio_resid == start_resid) { 1122fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1123fa9e4066Sahrens return (error); 1124fa9e4066Sahrens } 1125fa9e4066Sahrens 112655da60b9SMark J Musante if (ioflag & (FSYNC | FDSYNC) || 112755da60b9SMark J Musante zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 11285002558fSNeil Perrin zil_commit(zilog, zp->z_id); 1129fa9e4066Sahrens 1130fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1131fa9e4066Sahrens return (0); 1132fa9e4066Sahrens } 1133fa9e4066Sahrens 1134cab3a55eSPrakash Surya /* ARGSUSED */ 1135c5c6ffa0Smaybee void 1136b24ab676SJeff Bonwick zfs_get_done(zgd_t *zgd, int error) 1137c5c6ffa0Smaybee { 1138b24ab676SJeff Bonwick znode_t *zp = zgd->zgd_private; 1139b24ab676SJeff Bonwick objset_t *os = zp->z_zfsvfs->z_os; 1140b24ab676SJeff Bonwick 1141b24ab676SJeff Bonwick if (zgd->zgd_db) 1142b24ab676SJeff Bonwick dmu_buf_rele(zgd->zgd_db, zgd); 1143b24ab676SJeff Bonwick 114479315247SMatthew Ahrens rangelock_exit(zgd->zgd_lr); 1145c5c6ffa0Smaybee 11469d3574bfSNeil Perrin /* 11479d3574bfSNeil Perrin * Release the vnode asynchronously as we currently have the 11489d3574bfSNeil Perrin * txg stopped from syncing. 11499d3574bfSNeil Perrin */ 1150b24ab676SJeff Bonwick VN_RELE_ASYNC(ZTOV(zp), dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 1151b24ab676SJeff Bonwick 115267bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 1153c5c6ffa0Smaybee } 1154c5c6ffa0Smaybee 1155c87b8fc5SMark J Musante #ifdef DEBUG 1156c87b8fc5SMark J Musante static int zil_fault_io = 0; 1157c87b8fc5SMark J Musante #endif 1158c87b8fc5SMark J Musante 1159fa9e4066Sahrens /* 1160fa9e4066Sahrens * Get data to generate a TX_WRITE intent log record. 1161fa9e4066Sahrens */ 1162fa9e4066Sahrens int 11631271e4b1SPrakash Surya zfs_get_data(void *arg, lr_write_t *lr, char *buf, struct lwb *lwb, zio_t *zio) 1164fa9e4066Sahrens { 1165fa9e4066Sahrens zfsvfs_t *zfsvfs = arg; 1166fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 1167fa9e4066Sahrens znode_t *zp; 1168b24ab676SJeff Bonwick uint64_t object = lr->lr_foid; 1169b24ab676SJeff Bonwick uint64_t offset = lr->lr_offset; 1170b24ab676SJeff Bonwick uint64_t size = lr->lr_length; 1171c5c6ffa0Smaybee dmu_buf_t *db; 117267bd71c6Sperrin zgd_t *zgd; 1173fa9e4066Sahrens int error = 0; 1174fa9e4066Sahrens 11751271e4b1SPrakash Surya ASSERT3P(lwb, !=, NULL); 11761271e4b1SPrakash Surya ASSERT3P(zio, !=, NULL); 11771271e4b1SPrakash Surya ASSERT3U(size, !=, 0); 1178fa9e4066Sahrens 1179fa9e4066Sahrens /* 1180104e2ed7Sperrin * Nothing to do if the file has been removed 1181fa9e4066Sahrens */ 1182b24ab676SJeff Bonwick if (zfs_zget(zfsvfs, object, &zp) != 0) 1183be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1184893a6d32Sahrens if (zp->z_unlinked) { 11859d3574bfSNeil Perrin /* 11869d3574bfSNeil Perrin * Release the vnode asynchronously as we currently have the 11879d3574bfSNeil Perrin * txg stopped from syncing. 11889d3574bfSNeil Perrin */ 11899d3574bfSNeil Perrin VN_RELE_ASYNC(ZTOV(zp), 11909d3574bfSNeil Perrin dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 1191be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1192fa9e4066Sahrens } 1193fa9e4066Sahrens 1194b24ab676SJeff Bonwick zgd = (zgd_t *)kmem_zalloc(sizeof (zgd_t), KM_SLEEP); 11951271e4b1SPrakash Surya zgd->zgd_lwb = lwb; 1196b24ab676SJeff Bonwick zgd->zgd_private = zp; 1197b24ab676SJeff Bonwick 1198fa9e4066Sahrens /* 1199fa9e4066Sahrens * Write records come in two flavors: immediate and indirect. 1200fa9e4066Sahrens * For small writes it's cheaper to store the data with the 1201fa9e4066Sahrens * log record (immediate); for large writes it's cheaper to 1202fa9e4066Sahrens * sync the data and get a pointer to it (indirect) so that 1203fa9e4066Sahrens * we don't have to write the data twice. 1204fa9e4066Sahrens */ 1205104e2ed7Sperrin if (buf != NULL) { /* immediate write */ 120679315247SMatthew Ahrens zgd->zgd_lr = rangelock_enter(&zp->z_rangelock, 120779315247SMatthew Ahrens offset, size, RL_READER); 1208104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 12090a586ceaSMark Shellenbaum if (offset >= zp->z_size) { 1210be6fd75aSMatthew Ahrens error = SET_ERROR(ENOENT); 1211b24ab676SJeff Bonwick } else { 1212b24ab676SJeff Bonwick error = dmu_read(os, object, offset, size, buf, 1213b24ab676SJeff Bonwick DMU_READ_NO_PREFETCH); 1214104e2ed7Sperrin } 1215b24ab676SJeff Bonwick ASSERT(error == 0 || error == ENOENT); 1216104e2ed7Sperrin } else { /* indirect write */ 1217fa9e4066Sahrens /* 1218104e2ed7Sperrin * Have to lock the whole block to ensure when it's 121942b14111SLOLi * written out and its checksum is being calculated 1220104e2ed7Sperrin * that no one can change the data. We need to re-check 1221104e2ed7Sperrin * blocksize after we get the lock in case it's changed! 1222fa9e4066Sahrens */ 1223104e2ed7Sperrin for (;;) { 1224b24ab676SJeff Bonwick uint64_t blkoff; 1225b24ab676SJeff Bonwick size = zp->z_blksz; 1226dfe73b3dSJeff Bonwick blkoff = ISP2(size) ? P2PHASE(offset, size) : offset; 1227b24ab676SJeff Bonwick offset -= blkoff; 122879315247SMatthew Ahrens zgd->zgd_lr = rangelock_enter(&zp->z_rangelock, 122979315247SMatthew Ahrens offset, size, RL_READER); 1230b24ab676SJeff Bonwick if (zp->z_blksz == size) 1231104e2ed7Sperrin break; 1232b24ab676SJeff Bonwick offset += blkoff; 123379315247SMatthew Ahrens rangelock_exit(zgd->zgd_lr); 1234104e2ed7Sperrin } 1235104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 12360a586ceaSMark Shellenbaum if (lr->lr_offset >= zp->z_size) 1237be6fd75aSMatthew Ahrens error = SET_ERROR(ENOENT); 1238c87b8fc5SMark J Musante #ifdef DEBUG 1239c87b8fc5SMark J Musante if (zil_fault_io) { 1240be6fd75aSMatthew Ahrens error = SET_ERROR(EIO); 1241c87b8fc5SMark J Musante zil_fault_io = 0; 1242c87b8fc5SMark J Musante } 1243c87b8fc5SMark J Musante #endif 1244b24ab676SJeff Bonwick if (error == 0) 124547cb52daSJeff Bonwick error = dmu_buf_hold(os, object, offset, zgd, &db, 124647cb52daSJeff Bonwick DMU_READ_NO_PREFETCH); 1247c87b8fc5SMark J Musante 1248975c32a0SNeil Perrin if (error == 0) { 1249b7edcb94SMatthew Ahrens blkptr_t *bp = &lr->lr_blkptr; 125080901aeaSGeorge Wilson 1251b24ab676SJeff Bonwick zgd->zgd_db = db; 1252b24ab676SJeff Bonwick zgd->zgd_bp = bp; 1253b24ab676SJeff Bonwick 1254b24ab676SJeff Bonwick ASSERT(db->db_offset == offset); 1255b24ab676SJeff Bonwick ASSERT(db->db_size == size); 1256b24ab676SJeff Bonwick 1257b24ab676SJeff Bonwick error = dmu_sync(zio, lr->lr_common.lrc_txg, 1258b24ab676SJeff Bonwick zfs_get_done, zgd); 12590c94e1afSAndriy Gapon ASSERT(error || lr->lr_length <= size); 1260b24ab676SJeff Bonwick 1261975c32a0SNeil Perrin /* 1262b24ab676SJeff Bonwick * On success, we need to wait for the write I/O 1263b24ab676SJeff Bonwick * initiated by dmu_sync() to complete before we can 1264b24ab676SJeff Bonwick * release this dbuf. We will finish everything up 1265b24ab676SJeff Bonwick * in the zfs_get_done() callback. 1266975c32a0SNeil Perrin */ 1267b24ab676SJeff Bonwick if (error == 0) 1268b24ab676SJeff Bonwick return (0); 1269975c32a0SNeil Perrin 1270b24ab676SJeff Bonwick if (error == EALREADY) { 1271b24ab676SJeff Bonwick lr->lr_common.lrc_txtype = TX_WRITE2; 12725cabbc6bSPrashanth Sreenivasa /* 12735cabbc6bSPrashanth Sreenivasa * TX_WRITE2 relies on the data previously 12745cabbc6bSPrashanth Sreenivasa * written by the TX_WRITE that caused 12755cabbc6bSPrashanth Sreenivasa * EALREADY. We zero out the BP because 1276cab3a55eSPrakash Surya * it is the old, currently-on-disk BP. 12775cabbc6bSPrashanth Sreenivasa */ 12785cabbc6bSPrashanth Sreenivasa zgd->zgd_bp = NULL; 12795cabbc6bSPrashanth Sreenivasa BP_ZERO(bp); 1280b24ab676SJeff Bonwick error = 0; 1281b24ab676SJeff Bonwick } 1282975c32a0SNeil Perrin } 1283fa9e4066Sahrens } 1284b24ab676SJeff Bonwick 1285b24ab676SJeff Bonwick zfs_get_done(zgd, error); 1286b24ab676SJeff Bonwick 1287fa9e4066Sahrens return (error); 1288fa9e4066Sahrens } 1289fa9e4066Sahrens 1290fa9e4066Sahrens /*ARGSUSED*/ 1291fa9e4066Sahrens static int 1292da6c28aaSamw zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr, 1293da6c28aaSamw caller_context_t *ct) 1294fa9e4066Sahrens { 1295fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1296fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1297fa9e4066Sahrens int error; 1298fa9e4066Sahrens 12993cb34c60Sahrens ZFS_ENTER(zfsvfs); 13003cb34c60Sahrens ZFS_VERIFY_ZP(zp); 1301da6c28aaSamw 1302da6c28aaSamw if (flag & V_ACE_MASK) 1303da6c28aaSamw error = zfs_zaccess(zp, mode, flag, B_FALSE, cr); 1304da6c28aaSamw else 1305da6c28aaSamw error = zfs_zaccess_rwx(zp, mode, flag, cr); 1306da6c28aaSamw 1307fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1308fa9e4066Sahrens return (error); 1309fa9e4066Sahrens } 1310fa9e4066Sahrens 1311d47621a4STim Haley /* 1312d47621a4STim Haley * If vnode is for a device return a specfs vnode instead. 1313d47621a4STim Haley */ 1314d47621a4STim Haley static int 1315d47621a4STim Haley specvp_check(vnode_t **vpp, cred_t *cr) 1316d47621a4STim Haley { 1317d47621a4STim Haley int error = 0; 1318d47621a4STim Haley 1319d47621a4STim Haley if (IS_DEVVP(*vpp)) { 1320d47621a4STim Haley struct vnode *svp; 1321d47621a4STim Haley 1322d47621a4STim Haley svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1323d47621a4STim Haley VN_RELE(*vpp); 1324d47621a4STim Haley if (svp == NULL) 1325be6fd75aSMatthew Ahrens error = SET_ERROR(ENOSYS); 1326d47621a4STim Haley *vpp = svp; 1327d47621a4STim Haley } 1328d47621a4STim Haley return (error); 1329d47621a4STim Haley } 1330d47621a4STim Haley 1331d47621a4STim Haley 1332fa9e4066Sahrens /* 1333fa9e4066Sahrens * Lookup an entry in a directory, or an extended attribute directory. 1334fa9e4066Sahrens * If it exists, return a held vnode reference for it. 1335fa9e4066Sahrens * 1336fa9e4066Sahrens * IN: dvp - vnode of directory to search. 1337fa9e4066Sahrens * nm - name of entry to lookup. 1338fa9e4066Sahrens * pnp - full pathname to lookup [UNUSED]. 1339fa9e4066Sahrens * flags - LOOKUP_XATTR set if looking for an attribute. 1340fa9e4066Sahrens * rdir - root directory vnode [UNUSED]. 1341fa9e4066Sahrens * cr - credentials of caller. 1342da6c28aaSamw * ct - caller context 1343da6c28aaSamw * direntflags - directory lookup flags 1344da6c28aaSamw * realpnp - returned pathname. 1345fa9e4066Sahrens * 1346fa9e4066Sahrens * OUT: vpp - vnode of located entry, NULL if not found. 1347fa9e4066Sahrens * 1348f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 1349fa9e4066Sahrens * 1350fa9e4066Sahrens * Timestamps: 1351fa9e4066Sahrens * NA 1352fa9e4066Sahrens */ 1353fa9e4066Sahrens /* ARGSUSED */ 1354fa9e4066Sahrens static int 1355fa9e4066Sahrens zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 1356da6c28aaSamw int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, 1357da6c28aaSamw int *direntflags, pathname_t *realpnp) 1358fa9e4066Sahrens { 1359fa9e4066Sahrens znode_t *zdp = VTOZ(dvp); 1360fa9e4066Sahrens zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 1361d47621a4STim Haley int error = 0; 1362d47621a4STim Haley 13631c17160aSKevin Crowe /* 13641c17160aSKevin Crowe * Fast path lookup, however we must skip DNLC lookup 13651c17160aSKevin Crowe * for case folding or normalizing lookups because the 13661c17160aSKevin Crowe * DNLC code only stores the passed in name. This means 13671c17160aSKevin Crowe * creating 'a' and removing 'A' on a case insensitive 13681c17160aSKevin Crowe * file system would work, but DNLC still thinks 'a' 13691c17160aSKevin Crowe * exists and won't let you create it again on the next 13701c17160aSKevin Crowe * pass through fast path. 13711c17160aSKevin Crowe */ 1372d47621a4STim Haley if (!(flags & (LOOKUP_XATTR | FIGNORECASE))) { 1373d47621a4STim Haley 1374d47621a4STim Haley if (dvp->v_type != VDIR) { 1375be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTDIR)); 13760a586ceaSMark Shellenbaum } else if (zdp->z_sa_hdl == NULL) { 1377be6fd75aSMatthew Ahrens return (SET_ERROR(EIO)); 1378d47621a4STim Haley } 1379d47621a4STim Haley 1380d47621a4STim Haley if (nm[0] == 0 || (nm[0] == '.' && nm[1] == '\0')) { 1381d47621a4STim Haley error = zfs_fastaccesschk_execute(zdp, cr); 1382d47621a4STim Haley if (!error) { 1383d47621a4STim Haley *vpp = dvp; 1384d47621a4STim Haley VN_HOLD(*vpp); 1385d47621a4STim Haley return (0); 1386d47621a4STim Haley } 1387d47621a4STim Haley return (error); 13881c17160aSKevin Crowe } else if (!zdp->z_zfsvfs->z_norm && 13891c17160aSKevin Crowe (zdp->z_zfsvfs->z_case == ZFS_CASE_SENSITIVE)) { 13901c17160aSKevin Crowe 1391d47621a4STim Haley vnode_t *tvp = dnlc_lookup(dvp, nm); 1392d47621a4STim Haley 1393d47621a4STim Haley if (tvp) { 1394d47621a4STim Haley error = zfs_fastaccesschk_execute(zdp, cr); 1395d47621a4STim Haley if (error) { 1396d47621a4STim Haley VN_RELE(tvp); 1397d47621a4STim Haley return (error); 1398d47621a4STim Haley } 1399d47621a4STim Haley if (tvp == DNLC_NO_VNODE) { 1400d47621a4STim Haley VN_RELE(tvp); 1401be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 1402d47621a4STim Haley } else { 1403d47621a4STim Haley *vpp = tvp; 1404d47621a4STim Haley return (specvp_check(vpp, cr)); 1405d47621a4STim Haley } 1406d47621a4STim Haley } 1407d47621a4STim Haley } 1408d47621a4STim Haley } 1409d47621a4STim Haley 1410d47621a4STim Haley DTRACE_PROBE2(zfs__fastpath__lookup__miss, vnode_t *, dvp, char *, nm); 1411fa9e4066Sahrens 14123cb34c60Sahrens ZFS_ENTER(zfsvfs); 14133cb34c60Sahrens ZFS_VERIFY_ZP(zdp); 1414fa9e4066Sahrens 1415fa9e4066Sahrens *vpp = NULL; 1416fa9e4066Sahrens 1417fa9e4066Sahrens if (flags & LOOKUP_XATTR) { 14187b55fa8eSck /* 14197b55fa8eSck * If the xattr property is off, refuse the lookup request. 14207b55fa8eSck */ 14217b55fa8eSck if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 14227b55fa8eSck ZFS_EXIT(zfsvfs); 1423be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 14247b55fa8eSck } 14257b55fa8eSck 1426fa9e4066Sahrens /* 1427fa9e4066Sahrens * We don't allow recursive attributes.. 1428fa9e4066Sahrens * Maybe someday we will. 1429fa9e4066Sahrens */ 14300a586ceaSMark Shellenbaum if (zdp->z_pflags & ZFS_XATTR) { 1431fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1432be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 1433fa9e4066Sahrens } 1434fa9e4066Sahrens 14353f063a9dSck if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 1436fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1437fa9e4066Sahrens return (error); 1438fa9e4066Sahrens } 1439fa9e4066Sahrens 1440fa9e4066Sahrens /* 1441fa9e4066Sahrens * Do we have permission to get into attribute directory? 1442fa9e4066Sahrens */ 1443fa9e4066Sahrens 1444da6c28aaSamw if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0, 1445da6c28aaSamw B_FALSE, cr)) { 1446fa9e4066Sahrens VN_RELE(*vpp); 1447da6c28aaSamw *vpp = NULL; 1448fa9e4066Sahrens } 1449fa9e4066Sahrens 1450fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1451fa9e4066Sahrens return (error); 1452fa9e4066Sahrens } 1453fa9e4066Sahrens 14540f2dc02eSek if (dvp->v_type != VDIR) { 14550f2dc02eSek ZFS_EXIT(zfsvfs); 1456be6fd75aSMatthew Ahrens return (SET_ERROR(ENOTDIR)); 14570f2dc02eSek } 1458736b9155Smarks 1459fa9e4066Sahrens /* 1460fa9e4066Sahrens * Check accessibility of directory. 1461fa9e4066Sahrens */ 1462fa9e4066Sahrens 1463da6c28aaSamw if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) { 1464fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1465fa9e4066Sahrens return (error); 1466fa9e4066Sahrens } 1467fa9e4066Sahrens 1468de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), 1469da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1470da6c28aaSamw ZFS_EXIT(zfsvfs); 1471be6fd75aSMatthew Ahrens return (SET_ERROR(EILSEQ)); 1472da6c28aaSamw } 1473fa9e4066Sahrens 1474da6c28aaSamw error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp); 1475d47621a4STim Haley if (error == 0) 1476d47621a4STim Haley error = specvp_check(vpp, cr); 1477fa9e4066Sahrens 1478fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1479fa9e4066Sahrens return (error); 1480fa9e4066Sahrens } 1481fa9e4066Sahrens 1482fa9e4066Sahrens /* 1483fa9e4066Sahrens * Attempt to create a new entry in a directory. If the entry 1484fa9e4066Sahrens * already exists, truncate the file if permissible, else return 1485fa9e4066Sahrens * an error. Return the vp of the created or trunc'd file. 1486fa9e4066Sahrens * 1487fa9e4066Sahrens * IN: dvp - vnode of directory to put new file entry in. 1488fa9e4066Sahrens * name - name of new file entry. 1489fa9e4066Sahrens * vap - attributes of new file. 1490fa9e4066Sahrens * excl - flag indicating exclusive or non-exclusive mode. 1491fa9e4066Sahrens * mode - mode to open file with. 1492fa9e4066Sahrens * cr - credentials of caller. 1493fa9e4066Sahrens * flag - large file flag [UNUSED]. 1494da6c28aaSamw * ct - caller context 14954bb73804SMatthew Ahrens * vsecp - ACL to be set 1496fa9e4066Sahrens * 1497fa9e4066Sahrens * OUT: vpp - vnode of created or trunc'd entry. 1498fa9e4066Sahrens * 1499f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 1500fa9e4066Sahrens * 1501fa9e4066Sahrens * Timestamps: 1502fa9e4066Sahrens * dvp - ctime|mtime updated if new entry created 1503fa9e4066Sahrens * vp - ctime|mtime always, atime if new 1504fa9e4066Sahrens */ 1505da6c28aaSamw 1506fa9e4066Sahrens /* ARGSUSED */ 1507fa9e4066Sahrens static int 1508fa9e4066Sahrens zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, 1509da6c28aaSamw int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct, 1510da6c28aaSamw vsecattr_t *vsecp) 1511fa9e4066Sahrens { 1512fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1513fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1514f18faf3fSek zilog_t *zilog; 1515f18faf3fSek objset_t *os; 1516fa9e4066Sahrens zfs_dirlock_t *dl; 1517fa9e4066Sahrens dmu_tx_t *tx; 1518fa9e4066Sahrens int error; 1519c1ce5987SMark Shellenbaum ksid_t *ksid; 1520c1ce5987SMark Shellenbaum uid_t uid; 1521c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 15220a586ceaSMark Shellenbaum zfs_acl_ids_t acl_ids; 152389459e17SMark Shellenbaum boolean_t fuid_dirtied; 1524c8c24165SMark Shellenbaum boolean_t have_acl = B_FALSE; 152569962b56SMatthew Ahrens boolean_t waited = B_FALSE; 1526da6c28aaSamw 1527da6c28aaSamw /* 1528da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1529da6c28aaSamw * make sure file system is at proper version 1530da6c28aaSamw */ 1531da6c28aaSamw 1532c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 1533c1ce5987SMark Shellenbaum if (ksid) 1534c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 1535c1ce5987SMark Shellenbaum else 1536c1ce5987SMark Shellenbaum uid = crgetuid(cr); 1537c1ce5987SMark Shellenbaum 1538da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1539da6c28aaSamw (vsecp || (vap->va_mask & AT_XVATTR) || 1540c1ce5987SMark Shellenbaum IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1541be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 1542fa9e4066Sahrens 15433cb34c60Sahrens ZFS_ENTER(zfsvfs); 15443cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1545f18faf3fSek os = zfsvfs->z_os; 1546f18faf3fSek zilog = zfsvfs->z_log; 1547fa9e4066Sahrens 1548de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 1549da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1550da6c28aaSamw ZFS_EXIT(zfsvfs); 1551be6fd75aSMatthew Ahrens return (SET_ERROR(EILSEQ)); 1552da6c28aaSamw } 1553da6c28aaSamw 1554da6c28aaSamw if (vap->va_mask & AT_XVATTR) { 1555da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1556da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1557da6c28aaSamw ZFS_EXIT(zfsvfs); 1558da6c28aaSamw return (error); 1559da6c28aaSamw } 1560da6c28aaSamw } 1561fa9e4066Sahrens top: 1562fa9e4066Sahrens *vpp = NULL; 1563fa9e4066Sahrens 1564fa9e4066Sahrens if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) 1565fa9e4066Sahrens vap->va_mode &= ~VSVTX; 1566fa9e4066Sahrens 1567fa9e4066Sahrens if (*name == '\0') { 1568fa9e4066Sahrens /* 1569fa9e4066Sahrens * Null component name refers to the directory itself. 1570fa9e4066Sahrens */ 1571fa9e4066Sahrens VN_HOLD(dvp); 1572fa9e4066Sahrens zp = dzp; 1573fa9e4066Sahrens dl = NULL; 1574fa9e4066Sahrens error = 0; 1575fa9e4066Sahrens } else { 1576fa9e4066Sahrens /* possible VN_HOLD(zp) */ 1577da6c28aaSamw int zflg = 0; 1578da6c28aaSamw 1579da6c28aaSamw if (flag & FIGNORECASE) 1580da6c28aaSamw zflg |= ZCILOOK; 1581da6c28aaSamw 1582da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1583da6c28aaSamw NULL, NULL); 1584da6c28aaSamw if (error) { 15850b2a8171SMark Shellenbaum if (have_acl) 15860b2a8171SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1587fa9e4066Sahrens if (strcmp(name, "..") == 0) 1588be6fd75aSMatthew Ahrens error = SET_ERROR(EISDIR); 1589fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1590fa9e4066Sahrens return (error); 1591fa9e4066Sahrens } 1592fa9e4066Sahrens } 15930a586ceaSMark Shellenbaum 1594fa9e4066Sahrens if (zp == NULL) { 1595da6c28aaSamw uint64_t txtype; 1596f67950b2SNasf-Fan uint64_t projid = ZFS_DEFAULT_PROJID; 1597da6c28aaSamw 1598fa9e4066Sahrens /* 1599fa9e4066Sahrens * Create a new file object and update the directory 1600fa9e4066Sahrens * to reference it. 1601fa9e4066Sahrens */ 1602da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 16030b2a8171SMark Shellenbaum if (have_acl) 16040b2a8171SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1605fa9e4066Sahrens goto out; 1606fa9e4066Sahrens } 1607fa9e4066Sahrens 1608fa9e4066Sahrens /* 1609fa9e4066Sahrens * We only support the creation of regular files in 1610fa9e4066Sahrens * extended attribute directories. 1611fa9e4066Sahrens */ 16120a586ceaSMark Shellenbaum 16130a586ceaSMark Shellenbaum if ((dzp->z_pflags & ZFS_XATTR) && 1614fa9e4066Sahrens (vap->va_type != VREG)) { 16150b2a8171SMark Shellenbaum if (have_acl) 16160b2a8171SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1617be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 1618fa9e4066Sahrens goto out; 1619fa9e4066Sahrens } 1620fa9e4066Sahrens 1621c8c24165SMark Shellenbaum if (!have_acl && (error = zfs_acl_ids_create(dzp, 0, vap, 1622c8c24165SMark Shellenbaum cr, vsecp, &acl_ids)) != 0) 162389459e17SMark Shellenbaum goto out; 1624c8c24165SMark Shellenbaum have_acl = B_TRUE; 1625c8c24165SMark Shellenbaum 1626f67950b2SNasf-Fan if (vap->va_type == VREG || vap->va_type == VDIR) 1627f67950b2SNasf-Fan projid = zfs_inherit_projid(dzp); 1628f67950b2SNasf-Fan if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, projid)) { 16294929fd5eSTim Haley zfs_acl_ids_free(&acl_ids); 1630be6fd75aSMatthew Ahrens error = SET_ERROR(EDQUOT); 163114843421SMatthew Ahrens goto out; 163214843421SMatthew Ahrens } 163389459e17SMark Shellenbaum 1634fa9e4066Sahrens tx = dmu_tx_create(os); 16350a586ceaSMark Shellenbaum 16360a586ceaSMark Shellenbaum dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + 16370a586ceaSMark Shellenbaum ZFS_SA_BASE_ATTR_SIZE); 16380a586ceaSMark Shellenbaum 163989459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 164014843421SMatthew Ahrens if (fuid_dirtied) 164114843421SMatthew Ahrens zfs_fuid_txhold(zfsvfs, tx); 1642ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 16430a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE); 16440a586ceaSMark Shellenbaum if (!zfsvfs->z_use_sa && 16450a586ceaSMark Shellenbaum acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 1646fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 16470a586ceaSMark Shellenbaum 0, acl_ids.z_aclp->z_acl_bytes); 1648da6c28aaSamw } 1649f864f99eSPrakash Surya error = dmu_tx_assign(tx, 1650f864f99eSPrakash Surya (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); 1651fa9e4066Sahrens if (error) { 1652fa9e4066Sahrens zfs_dirent_unlock(dl); 16531209a471SNeil Perrin if (error == ERESTART) { 165469962b56SMatthew Ahrens waited = B_TRUE; 16558a2f1b91Sahrens dmu_tx_wait(tx); 16568a2f1b91Sahrens dmu_tx_abort(tx); 1657fa9e4066Sahrens goto top; 1658fa9e4066Sahrens } 1659c8c24165SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 16608a2f1b91Sahrens dmu_tx_abort(tx); 1661fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1662fa9e4066Sahrens return (error); 1663fa9e4066Sahrens } 16640a586ceaSMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); 166589459e17SMark Shellenbaum 166689459e17SMark Shellenbaum if (fuid_dirtied) 166789459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 166889459e17SMark Shellenbaum 1669fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1670da6c28aaSamw txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); 1671da6c28aaSamw if (flag & FIGNORECASE) 1672da6c28aaSamw txtype |= TX_CI; 1673da6c28aaSamw zfs_log_create(zilog, tx, txtype, dzp, zp, name, 167489459e17SMark Shellenbaum vsecp, acl_ids.z_fuidp, vap); 167589459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1676fa9e4066Sahrens dmu_tx_commit(tx); 1677fa9e4066Sahrens } else { 1678da6c28aaSamw int aflags = (flag & FAPPEND) ? V_APPEND : 0; 1679da6c28aaSamw 16800b2a8171SMark Shellenbaum if (have_acl) 16810b2a8171SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 16820b2a8171SMark Shellenbaum have_acl = B_FALSE; 16830b2a8171SMark Shellenbaum 1684fa9e4066Sahrens /* 1685fa9e4066Sahrens * A directory entry already exists for this name. 1686fa9e4066Sahrens */ 1687fa9e4066Sahrens /* 1688fa9e4066Sahrens * Can't truncate an existing file if in exclusive mode. 1689fa9e4066Sahrens */ 1690fa9e4066Sahrens if (excl == EXCL) { 1691be6fd75aSMatthew Ahrens error = SET_ERROR(EEXIST); 1692fa9e4066Sahrens goto out; 1693fa9e4066Sahrens } 1694fa9e4066Sahrens /* 1695fa9e4066Sahrens * Can't open a directory for writing. 1696fa9e4066Sahrens */ 1697fa9e4066Sahrens if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1698be6fd75aSMatthew Ahrens error = SET_ERROR(EISDIR); 1699fa9e4066Sahrens goto out; 1700fa9e4066Sahrens } 1701fa9e4066Sahrens /* 1702fa9e4066Sahrens * Verify requested access to file. 1703fa9e4066Sahrens */ 1704da6c28aaSamw if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) { 1705fa9e4066Sahrens goto out; 1706fa9e4066Sahrens } 1707fa9e4066Sahrens 1708fa9e4066Sahrens mutex_enter(&dzp->z_lock); 1709fa9e4066Sahrens dzp->z_seq++; 1710fa9e4066Sahrens mutex_exit(&dzp->z_lock); 1711fa9e4066Sahrens 17125730cc9aSmaybee /* 17135730cc9aSmaybee * Truncate regular files if requested. 17145730cc9aSmaybee */ 17155730cc9aSmaybee if ((ZTOV(zp)->v_type == VREG) && 1716fa9e4066Sahrens (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 1717cdb0ab79Smaybee /* we can't hold any locks when calling zfs_freesp() */ 1718cdb0ab79Smaybee zfs_dirent_unlock(dl); 1719cdb0ab79Smaybee dl = NULL; 17205730cc9aSmaybee error = zfs_freesp(zp, 0, 0, mode, TRUE); 1721df2381bfSpraks if (error == 0) { 1722da6c28aaSamw vnevent_create(ZTOV(zp), ct); 1723df2381bfSpraks } 1724fa9e4066Sahrens } 1725fa9e4066Sahrens } 1726fa9e4066Sahrens out: 1727fa9e4066Sahrens 1728fa9e4066Sahrens if (dl) 1729fa9e4066Sahrens zfs_dirent_unlock(dl); 1730fa9e4066Sahrens 1731fa9e4066Sahrens if (error) { 1732fa9e4066Sahrens if (zp) 1733fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1734fa9e4066Sahrens } else { 1735fa9e4066Sahrens *vpp = ZTOV(zp); 1736d47621a4STim Haley error = specvp_check(vpp, cr); 1737fa9e4066Sahrens } 1738fa9e4066Sahrens 173955da60b9SMark J Musante if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 17405002558fSNeil Perrin zil_commit(zilog, 0); 174155da60b9SMark J Musante 1742fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1743fa9e4066Sahrens return (error); 1744fa9e4066Sahrens } 1745fa9e4066Sahrens 1746fa9e4066Sahrens /* 1747fa9e4066Sahrens * Remove an entry from a directory. 1748fa9e4066Sahrens * 1749fa9e4066Sahrens * IN: dvp - vnode of directory to remove entry from. 1750fa9e4066Sahrens * name - name of entry to remove. 1751fa9e4066Sahrens * cr - credentials of caller. 1752da6c28aaSamw * ct - caller context 1753da6c28aaSamw * flags - case flags 1754fa9e4066Sahrens * 1755f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 1756fa9e4066Sahrens * 1757fa9e4066Sahrens * Timestamps: 1758fa9e4066Sahrens * dvp - ctime|mtime 1759fa9e4066Sahrens * vp - ctime (if nlink > 0) 1760fa9e4066Sahrens */ 17610a586ceaSMark Shellenbaum 17620a586ceaSMark Shellenbaum uint64_t null_xattr = 0; 17630a586ceaSMark Shellenbaum 1764da6c28aaSamw /*ARGSUSED*/ 1765fa9e4066Sahrens static int 1766da6c28aaSamw zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct, 1767da6c28aaSamw int flags) 1768fa9e4066Sahrens { 1769fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 17700b2a8171SMark Shellenbaum znode_t *xzp; 1771fa9e4066Sahrens vnode_t *vp; 1772fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1773f18faf3fSek zilog_t *zilog; 17740b2a8171SMark Shellenbaum uint64_t acl_obj, xattr_obj; 17754bb73804SMatthew Ahrens uint64_t xattr_obj_unlinked = 0; 177651bd2f97SNeil Perrin uint64_t obj = 0; 1777fa9e4066Sahrens zfs_dirlock_t *dl; 1778fa9e4066Sahrens dmu_tx_t *tx; 1779893a6d32Sahrens boolean_t may_delete_now, delete_now = FALSE; 1780cdb0ab79Smaybee boolean_t unlinked, toobig = FALSE; 1781da6c28aaSamw uint64_t txtype; 1782da6c28aaSamw pathname_t *realnmp = NULL; 1783da6c28aaSamw pathname_t realnm; 1784fa9e4066Sahrens int error; 1785da6c28aaSamw int zflg = ZEXISTS; 178669962b56SMatthew Ahrens boolean_t waited = B_FALSE; 1787fa9e4066Sahrens 17883cb34c60Sahrens ZFS_ENTER(zfsvfs); 17893cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1790f18faf3fSek zilog = zfsvfs->z_log; 1791fa9e4066Sahrens 1792da6c28aaSamw if (flags & FIGNORECASE) { 1793da6c28aaSamw zflg |= ZCILOOK; 1794da6c28aaSamw pn_alloc(&realnm); 1795da6c28aaSamw realnmp = &realnm; 1796da6c28aaSamw } 1797da6c28aaSamw 1798fa9e4066Sahrens top: 17990b2a8171SMark Shellenbaum xattr_obj = 0; 18000b2a8171SMark Shellenbaum xzp = NULL; 1801fa9e4066Sahrens /* 1802fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1803fa9e4066Sahrens */ 1804da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1805da6c28aaSamw NULL, realnmp)) { 1806da6c28aaSamw if (realnmp) 1807da6c28aaSamw pn_free(realnmp); 1808fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1809fa9e4066Sahrens return (error); 1810fa9e4066Sahrens } 1811fa9e4066Sahrens 1812fa9e4066Sahrens vp = ZTOV(zp); 1813fa9e4066Sahrens 1814fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1815fa9e4066Sahrens goto out; 1816fa9e4066Sahrens } 1817fa9e4066Sahrens 1818fa9e4066Sahrens /* 1819fa9e4066Sahrens * Need to use rmdir for removing directories. 1820fa9e4066Sahrens */ 1821fa9e4066Sahrens if (vp->v_type == VDIR) { 1822be6fd75aSMatthew Ahrens error = SET_ERROR(EPERM); 1823fa9e4066Sahrens goto out; 1824fa9e4066Sahrens } 1825fa9e4066Sahrens 1826da6c28aaSamw vnevent_remove(vp, dvp, name, ct); 1827fa9e4066Sahrens 1828da6c28aaSamw if (realnmp) 1829ab04eb8eStimh dnlc_remove(dvp, realnmp->pn_buf); 1830da6c28aaSamw else 1831da6c28aaSamw dnlc_remove(dvp, name); 1832033f9833Sek 1833fa9e4066Sahrens mutex_enter(&vp->v_lock); 1834fa9e4066Sahrens may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1835fa9e4066Sahrens mutex_exit(&vp->v_lock); 1836fa9e4066Sahrens 1837fa9e4066Sahrens /* 1838893a6d32Sahrens * We may delete the znode now, or we may put it in the unlinked set; 1839fa9e4066Sahrens * it depends on whether we're the last link, and on whether there are 1840fa9e4066Sahrens * other holds on the vnode. So we dmu_tx_hold() the right things to 1841fa9e4066Sahrens * allow for either case. 1842fa9e4066Sahrens */ 184351bd2f97SNeil Perrin obj = zp->z_id; 1844fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1845ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 18460a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 18470a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, zp); 18480a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, dzp); 1849cdb0ab79Smaybee if (may_delete_now) { 1850cdb0ab79Smaybee toobig = 18510a586ceaSMark Shellenbaum zp->z_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT; 1852cdb0ab79Smaybee /* if the file is too big, only hold_free a token amount */ 1853cdb0ab79Smaybee dmu_tx_hold_free(tx, zp->z_id, 0, 1854cdb0ab79Smaybee (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END)); 1855cdb0ab79Smaybee } 1856fa9e4066Sahrens 1857fa9e4066Sahrens /* are there any extended attributes? */ 18580a586ceaSMark Shellenbaum error = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), 18590a586ceaSMark Shellenbaum &xattr_obj, sizeof (xattr_obj)); 18600b2a8171SMark Shellenbaum if (error == 0 && xattr_obj) { 18610a586ceaSMark Shellenbaum error = zfs_zget(zfsvfs, xattr_obj, &xzp); 1862fb09f5aaSMadhav Suresh ASSERT0(error); 18630a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 18640a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, xzp->z_sa_hdl, B_FALSE); 1865fa9e4066Sahrens } 1866fa9e4066Sahrens 18671412a1a2SMark Shellenbaum mutex_enter(&zp->z_lock); 18681412a1a2SMark Shellenbaum if ((acl_obj = zfs_external_acl(zp)) != 0 && may_delete_now) 1869fa9e4066Sahrens dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 18701412a1a2SMark Shellenbaum mutex_exit(&zp->z_lock); 1871fa9e4066Sahrens 1872fa9e4066Sahrens /* charge as an update -- would be nice not to charge at all */ 1873893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1874fa9e4066Sahrens 18754bb73804SMatthew Ahrens /* 18766575bca0SSimon Klinkert * Mark this transaction as typically resulting in a net free of space 18774bb73804SMatthew Ahrens */ 18786575bca0SSimon Klinkert dmu_tx_mark_netfree(tx); 18794bb73804SMatthew Ahrens 1880f864f99eSPrakash Surya error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); 1881fa9e4066Sahrens if (error) { 1882fa9e4066Sahrens zfs_dirent_unlock(dl); 1883fa9e4066Sahrens VN_RELE(vp); 18840b2a8171SMark Shellenbaum if (xzp) 18850b2a8171SMark Shellenbaum VN_RELE(ZTOV(xzp)); 18861209a471SNeil Perrin if (error == ERESTART) { 188769962b56SMatthew Ahrens waited = B_TRUE; 18888a2f1b91Sahrens dmu_tx_wait(tx); 18898a2f1b91Sahrens dmu_tx_abort(tx); 1890fa9e4066Sahrens goto top; 1891fa9e4066Sahrens } 1892da6c28aaSamw if (realnmp) 1893da6c28aaSamw pn_free(realnmp); 18948a2f1b91Sahrens dmu_tx_abort(tx); 1895fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1896fa9e4066Sahrens return (error); 1897fa9e4066Sahrens } 1898fa9e4066Sahrens 1899fa9e4066Sahrens /* 1900fa9e4066Sahrens * Remove the directory entry. 1901fa9e4066Sahrens */ 1902da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked); 1903fa9e4066Sahrens 1904fa9e4066Sahrens if (error) { 1905fa9e4066Sahrens dmu_tx_commit(tx); 1906fa9e4066Sahrens goto out; 1907fa9e4066Sahrens } 1908fa9e4066Sahrens 1909893a6d32Sahrens if (unlinked) { 19101412a1a2SMark Shellenbaum /* 19111412a1a2SMark Shellenbaum * Hold z_lock so that we can make sure that the ACL obj 19121412a1a2SMark Shellenbaum * hasn't changed. Could have been deleted due to 19131412a1a2SMark Shellenbaum * zfs_sa_upgrade(). 19141412a1a2SMark Shellenbaum */ 19151412a1a2SMark Shellenbaum mutex_enter(&zp->z_lock); 1916fa9e4066Sahrens mutex_enter(&vp->v_lock); 19170a586ceaSMark Shellenbaum (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), 19180a586ceaSMark Shellenbaum &xattr_obj_unlinked, sizeof (xattr_obj_unlinked)); 1919cdb0ab79Smaybee delete_now = may_delete_now && !toobig && 1920fa9e4066Sahrens vp->v_count == 1 && !vn_has_cached_data(vp) && 19211412a1a2SMark Shellenbaum xattr_obj == xattr_obj_unlinked && zfs_external_acl(zp) == 19220a586ceaSMark Shellenbaum acl_obj; 1923fa9e4066Sahrens mutex_exit(&vp->v_lock); 1924fa9e4066Sahrens } 1925fa9e4066Sahrens 1926fa9e4066Sahrens if (delete_now) { 19270a586ceaSMark Shellenbaum if (xattr_obj_unlinked) { 19280a586ceaSMark Shellenbaum ASSERT3U(xzp->z_links, ==, 2); 1929fa9e4066Sahrens mutex_enter(&xzp->z_lock); 1930893a6d32Sahrens xzp->z_unlinked = 1; 19310a586ceaSMark Shellenbaum xzp->z_links = 0; 19320a586ceaSMark Shellenbaum error = sa_update(xzp->z_sa_hdl, SA_ZPL_LINKS(zfsvfs), 19330a586ceaSMark Shellenbaum &xzp->z_links, sizeof (xzp->z_links), tx); 19340a586ceaSMark Shellenbaum ASSERT3U(error, ==, 0); 1935fa9e4066Sahrens mutex_exit(&xzp->z_lock); 1936893a6d32Sahrens zfs_unlinked_add(xzp, tx); 19371412a1a2SMark Shellenbaum 19380a586ceaSMark Shellenbaum if (zp->z_is_sa) 19390a586ceaSMark Shellenbaum error = sa_remove(zp->z_sa_hdl, 19400a586ceaSMark Shellenbaum SA_ZPL_XATTR(zfsvfs), tx); 19410a586ceaSMark Shellenbaum else 19420a586ceaSMark Shellenbaum error = sa_update(zp->z_sa_hdl, 19430a586ceaSMark Shellenbaum SA_ZPL_XATTR(zfsvfs), &null_xattr, 19440a586ceaSMark Shellenbaum sizeof (uint64_t), tx); 1945fb09f5aaSMadhav Suresh ASSERT0(error); 1946fa9e4066Sahrens } 1947fa9e4066Sahrens mutex_enter(&vp->v_lock); 1948ade42b55SSebastien Roy VN_RELE_LOCKED(vp); 1949fb09f5aaSMadhav Suresh ASSERT0(vp->v_count); 1950fa9e4066Sahrens mutex_exit(&vp->v_lock); 1951fa9e4066Sahrens mutex_exit(&zp->z_lock); 1952fa9e4066Sahrens zfs_znode_delete(zp, tx); 1953893a6d32Sahrens } else if (unlinked) { 19541412a1a2SMark Shellenbaum mutex_exit(&zp->z_lock); 1955893a6d32Sahrens zfs_unlinked_add(zp, tx); 1956fa9e4066Sahrens } 1957fa9e4066Sahrens 1958da6c28aaSamw txtype = TX_REMOVE; 1959da6c28aaSamw if (flags & FIGNORECASE) 1960da6c28aaSamw txtype |= TX_CI; 1961d8849d7dSChunwei Chen zfs_log_remove(zilog, tx, txtype, dzp, name, obj, unlinked); 1962fa9e4066Sahrens 1963fa9e4066Sahrens dmu_tx_commit(tx); 1964fa9e4066Sahrens out: 1965da6c28aaSamw if (realnmp) 1966da6c28aaSamw pn_free(realnmp); 1967da6c28aaSamw 1968fa9e4066Sahrens zfs_dirent_unlock(dl); 1969fa9e4066Sahrens 197006e0070dSMark Shellenbaum if (!delete_now) 1971fa9e4066Sahrens VN_RELE(vp); 197206e0070dSMark Shellenbaum if (xzp) 1973fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 1974fa9e4066Sahrens 197555da60b9SMark J Musante if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 19765002558fSNeil Perrin zil_commit(zilog, 0); 197755da60b9SMark J Musante 1978fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1979fa9e4066Sahrens return (error); 1980fa9e4066Sahrens } 1981fa9e4066Sahrens 1982fa9e4066Sahrens /* 1983fa9e4066Sahrens * Create a new directory and insert it into dvp using the name 1984fa9e4066Sahrens * provided. Return a pointer to the inserted directory. 1985fa9e4066Sahrens * 1986fa9e4066Sahrens * IN: dvp - vnode of directory to add subdir to. 1987fa9e4066Sahrens * dirname - name of new directory. 1988fa9e4066Sahrens * vap - attributes of new directory. 1989fa9e4066Sahrens * cr - credentials of caller. 1990da6c28aaSamw * ct - caller context 1991f7170741SWill Andrews * flags - case flags 1992da6c28aaSamw * vsecp - ACL to be set 1993fa9e4066Sahrens * 1994fa9e4066Sahrens * OUT: vpp - vnode of created directory. 1995fa9e4066Sahrens * 1996f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 1997fa9e4066Sahrens * 1998fa9e4066Sahrens * Timestamps: 1999fa9e4066Sahrens * dvp - ctime|mtime updated 2000fa9e4066Sahrens * vp - ctime|mtime|atime updated 2001fa9e4066Sahrens */ 2002da6c28aaSamw /*ARGSUSED*/ 2003fa9e4066Sahrens static int 2004da6c28aaSamw zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr, 2005da6c28aaSamw caller_context_t *ct, int flags, vsecattr_t *vsecp) 2006fa9e4066Sahrens { 2007fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 2008fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2009f18faf3fSek zilog_t *zilog; 2010fa9e4066Sahrens zfs_dirlock_t *dl; 2011da6c28aaSamw uint64_t txtype; 2012fa9e4066Sahrens dmu_tx_t *tx; 2013fa9e4066Sahrens int error; 2014da6c28aaSamw int zf = ZNEW; 2015c1ce5987SMark Shellenbaum ksid_t *ksid; 2016c1ce5987SMark Shellenbaum uid_t uid; 2017c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 20180a586ceaSMark Shellenbaum zfs_acl_ids_t acl_ids; 201989459e17SMark Shellenbaum boolean_t fuid_dirtied; 202069962b56SMatthew Ahrens boolean_t waited = B_FALSE; 2021fa9e4066Sahrens 2022fa9e4066Sahrens ASSERT(vap->va_type == VDIR); 2023fa9e4066Sahrens 2024da6c28aaSamw /* 2025da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 2026da6c28aaSamw * make sure file system is at proper version 2027da6c28aaSamw */ 2028da6c28aaSamw 2029c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 2030c1ce5987SMark Shellenbaum if (ksid) 2031c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 2032c1ce5987SMark Shellenbaum else 2033c1ce5987SMark Shellenbaum uid = crgetuid(cr); 2034da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 2035c1ce5987SMark Shellenbaum (vsecp || (vap->va_mask & AT_XVATTR) || 2036756962ecSMark Shellenbaum IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 2037be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2038da6c28aaSamw 20393cb34c60Sahrens ZFS_ENTER(zfsvfs); 20403cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 2041f18faf3fSek zilog = zfsvfs->z_log; 2042fa9e4066Sahrens 20430a586ceaSMark Shellenbaum if (dzp->z_pflags & ZFS_XATTR) { 2044fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2045be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2046fa9e4066Sahrens } 2047da6c28aaSamw 2048de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(dirname, 2049da6c28aaSamw strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 2050da6c28aaSamw ZFS_EXIT(zfsvfs); 2051be6fd75aSMatthew Ahrens return (SET_ERROR(EILSEQ)); 2052da6c28aaSamw } 2053da6c28aaSamw if (flags & FIGNORECASE) 2054da6c28aaSamw zf |= ZCILOOK; 2055da6c28aaSamw 2056c8c24165SMark Shellenbaum if (vap->va_mask & AT_XVATTR) { 2057da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 2058da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 2059da6c28aaSamw ZFS_EXIT(zfsvfs); 2060da6c28aaSamw return (error); 2061da6c28aaSamw } 2062c8c24165SMark Shellenbaum } 2063fa9e4066Sahrens 2064c8c24165SMark Shellenbaum if ((error = zfs_acl_ids_create(dzp, 0, vap, cr, 2065c8c24165SMark Shellenbaum vsecp, &acl_ids)) != 0) { 2066c8c24165SMark Shellenbaum ZFS_EXIT(zfsvfs); 2067c8c24165SMark Shellenbaum return (error); 2068c8c24165SMark Shellenbaum } 2069fa9e4066Sahrens /* 2070fa9e4066Sahrens * First make sure the new directory doesn't exist. 2071c8c24165SMark Shellenbaum * 2072c8c24165SMark Shellenbaum * Existence is checked first to make sure we don't return 2073c8c24165SMark Shellenbaum * EACCES instead of EEXIST which can cause some applications 2074c8c24165SMark Shellenbaum * to fail. 2075fa9e4066Sahrens */ 2076da6c28aaSamw top: 2077da6c28aaSamw *vpp = NULL; 2078da6c28aaSamw 2079da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf, 2080da6c28aaSamw NULL, NULL)) { 2081c8c24165SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 2082fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2083fa9e4066Sahrens return (error); 2084fa9e4066Sahrens } 2085fa9e4066Sahrens 2086da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) { 2087c8c24165SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 2088d2443e76Smarks zfs_dirent_unlock(dl); 2089d2443e76Smarks ZFS_EXIT(zfsvfs); 2090d2443e76Smarks return (error); 2091d2443e76Smarks } 2092d2443e76Smarks 2093f67950b2SNasf-Fan if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, zfs_inherit_projid(dzp))) { 20944929fd5eSTim Haley zfs_acl_ids_free(&acl_ids); 209514843421SMatthew Ahrens zfs_dirent_unlock(dl); 209614843421SMatthew Ahrens ZFS_EXIT(zfsvfs); 2097be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 209814843421SMatthew Ahrens } 209989459e17SMark Shellenbaum 2100fa9e4066Sahrens /* 2101fa9e4066Sahrens * Add a new entry to the directory. 2102fa9e4066Sahrens */ 2103fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2104ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 2105ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 210689459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 210714843421SMatthew Ahrens if (fuid_dirtied) 210814843421SMatthew Ahrens zfs_fuid_txhold(zfsvfs, tx); 21090a586ceaSMark Shellenbaum if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 21100a586ceaSMark Shellenbaum dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 21110a586ceaSMark Shellenbaum acl_ids.z_aclp->z_acl_bytes); 21120a586ceaSMark Shellenbaum } 21130a586ceaSMark Shellenbaum 21140a586ceaSMark Shellenbaum dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + 21150a586ceaSMark Shellenbaum ZFS_SA_BASE_ATTR_SIZE); 21160a586ceaSMark Shellenbaum 2117f864f99eSPrakash Surya error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); 2118fa9e4066Sahrens if (error) { 2119fa9e4066Sahrens zfs_dirent_unlock(dl); 21201209a471SNeil Perrin if (error == ERESTART) { 212169962b56SMatthew Ahrens waited = B_TRUE; 21228a2f1b91Sahrens dmu_tx_wait(tx); 21238a2f1b91Sahrens dmu_tx_abort(tx); 2124fa9e4066Sahrens goto top; 2125fa9e4066Sahrens } 2126c8c24165SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 21278a2f1b91Sahrens dmu_tx_abort(tx); 2128fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2129fa9e4066Sahrens return (error); 2130fa9e4066Sahrens } 2131fa9e4066Sahrens 2132fa9e4066Sahrens /* 2133fa9e4066Sahrens * Create new node. 2134fa9e4066Sahrens */ 21350a586ceaSMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); 2136fa9e4066Sahrens 213789459e17SMark Shellenbaum if (fuid_dirtied) 213889459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 21390a586ceaSMark Shellenbaum 2140fa9e4066Sahrens /* 2141fa9e4066Sahrens * Now put new name in parent dir. 2142fa9e4066Sahrens */ 2143fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 2144fa9e4066Sahrens 2145fa9e4066Sahrens *vpp = ZTOV(zp); 2146fa9e4066Sahrens 2147da6c28aaSamw txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap); 2148da6c28aaSamw if (flags & FIGNORECASE) 2149da6c28aaSamw txtype |= TX_CI; 215089459e17SMark Shellenbaum zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, 215189459e17SMark Shellenbaum acl_ids.z_fuidp, vap); 2152da6c28aaSamw 215389459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 21540a586ceaSMark Shellenbaum 2155fa9e4066Sahrens dmu_tx_commit(tx); 2156fa9e4066Sahrens 2157fa9e4066Sahrens zfs_dirent_unlock(dl); 2158fa9e4066Sahrens 215955da60b9SMark J Musante if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 21605002558fSNeil Perrin zil_commit(zilog, 0); 216155da60b9SMark J Musante 2162fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2163fa9e4066Sahrens return (0); 2164fa9e4066Sahrens } 2165fa9e4066Sahrens 2166fa9e4066Sahrens /* 2167fa9e4066Sahrens * Remove a directory subdir entry. If the current working 2168fa9e4066Sahrens * directory is the same as the subdir to be removed, the 2169fa9e4066Sahrens * remove will fail. 2170fa9e4066Sahrens * 2171fa9e4066Sahrens * IN: dvp - vnode of directory to remove from. 2172fa9e4066Sahrens * name - name of directory to be removed. 2173fa9e4066Sahrens * cwd - vnode of current working directory. 2174fa9e4066Sahrens * cr - credentials of caller. 2175da6c28aaSamw * ct - caller context 2176da6c28aaSamw * flags - case flags 2177fa9e4066Sahrens * 2178f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 2179fa9e4066Sahrens * 2180fa9e4066Sahrens * Timestamps: 2181fa9e4066Sahrens * dvp - ctime|mtime updated 2182fa9e4066Sahrens */ 2183da6c28aaSamw /*ARGSUSED*/ 2184fa9e4066Sahrens static int 2185da6c28aaSamw zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr, 2186da6c28aaSamw caller_context_t *ct, int flags) 2187fa9e4066Sahrens { 2188fa9e4066Sahrens znode_t *dzp = VTOZ(dvp); 2189fa9e4066Sahrens znode_t *zp; 2190fa9e4066Sahrens vnode_t *vp; 2191fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2192f18faf3fSek zilog_t *zilog; 2193fa9e4066Sahrens zfs_dirlock_t *dl; 2194fa9e4066Sahrens dmu_tx_t *tx; 2195fa9e4066Sahrens int error; 2196da6c28aaSamw int zflg = ZEXISTS; 219769962b56SMatthew Ahrens boolean_t waited = B_FALSE; 2198fa9e4066Sahrens 21993cb34c60Sahrens ZFS_ENTER(zfsvfs); 22003cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 2201f18faf3fSek zilog = zfsvfs->z_log; 2202fa9e4066Sahrens 2203da6c28aaSamw if (flags & FIGNORECASE) 2204da6c28aaSamw zflg |= ZCILOOK; 2205fa9e4066Sahrens top: 2206fa9e4066Sahrens zp = NULL; 2207fa9e4066Sahrens 2208fa9e4066Sahrens /* 2209fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 2210fa9e4066Sahrens */ 2211da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 2212da6c28aaSamw NULL, NULL)) { 2213fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2214fa9e4066Sahrens return (error); 2215fa9e4066Sahrens } 2216fa9e4066Sahrens 2217fa9e4066Sahrens vp = ZTOV(zp); 2218fa9e4066Sahrens 2219fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 2220fa9e4066Sahrens goto out; 2221fa9e4066Sahrens } 2222fa9e4066Sahrens 2223fa9e4066Sahrens if (vp->v_type != VDIR) { 2224be6fd75aSMatthew Ahrens error = SET_ERROR(ENOTDIR); 2225fa9e4066Sahrens goto out; 2226fa9e4066Sahrens } 2227fa9e4066Sahrens 2228fa9e4066Sahrens if (vp == cwd) { 2229be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 2230fa9e4066Sahrens goto out; 2231fa9e4066Sahrens } 2232fa9e4066Sahrens 2233da6c28aaSamw vnevent_rmdir(vp, dvp, name, ct); 2234fa9e4066Sahrens 2235fa9e4066Sahrens /* 2236af2c4821Smaybee * Grab a lock on the directory to make sure that noone is 2237af2c4821Smaybee * trying to add (or lookup) entries while we are removing it. 2238af2c4821Smaybee */ 2239af2c4821Smaybee rw_enter(&zp->z_name_lock, RW_WRITER); 2240af2c4821Smaybee 2241af2c4821Smaybee /* 2242af2c4821Smaybee * Grab a lock on the parent pointer to make sure we play well 2243fa9e4066Sahrens * with the treewalk and directory rename code. 2244fa9e4066Sahrens */ 2245fa9e4066Sahrens rw_enter(&zp->z_parent_lock, RW_WRITER); 2246fa9e4066Sahrens 2247fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2248ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 22490a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 2250893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 22510a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, zp); 22520a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, dzp); 225399189164SSimon Klinkert dmu_tx_mark_netfree(tx); 2254f864f99eSPrakash Surya error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); 2255fa9e4066Sahrens if (error) { 2256fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 2257af2c4821Smaybee rw_exit(&zp->z_name_lock); 2258fa9e4066Sahrens zfs_dirent_unlock(dl); 2259fa9e4066Sahrens VN_RELE(vp); 22601209a471SNeil Perrin if (error == ERESTART) { 226169962b56SMatthew Ahrens waited = B_TRUE; 22628a2f1b91Sahrens dmu_tx_wait(tx); 22638a2f1b91Sahrens dmu_tx_abort(tx); 2264fa9e4066Sahrens goto top; 2265fa9e4066Sahrens } 22668a2f1b91Sahrens dmu_tx_abort(tx); 2267fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2268fa9e4066Sahrens return (error); 2269fa9e4066Sahrens } 2270fa9e4066Sahrens 2271da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, NULL); 2272fa9e4066Sahrens 2273da6c28aaSamw if (error == 0) { 2274da6c28aaSamw uint64_t txtype = TX_RMDIR; 2275da6c28aaSamw if (flags & FIGNORECASE) 2276da6c28aaSamw txtype |= TX_CI; 2277d8849d7dSChunwei Chen zfs_log_remove(zilog, tx, txtype, dzp, name, ZFS_NO_OBJECT, 2278d8849d7dSChunwei Chen B_FALSE); 2279da6c28aaSamw } 2280fa9e4066Sahrens 2281fa9e4066Sahrens dmu_tx_commit(tx); 2282fa9e4066Sahrens 2283fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 2284af2c4821Smaybee rw_exit(&zp->z_name_lock); 2285fa9e4066Sahrens out: 2286fa9e4066Sahrens zfs_dirent_unlock(dl); 2287fa9e4066Sahrens 2288fa9e4066Sahrens VN_RELE(vp); 2289fa9e4066Sahrens 229055da60b9SMark J Musante if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 22915002558fSNeil Perrin zil_commit(zilog, 0); 229255da60b9SMark J Musante 2293fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2294fa9e4066Sahrens return (error); 2295fa9e4066Sahrens } 2296fa9e4066Sahrens 2297fa9e4066Sahrens /* 2298fa9e4066Sahrens * Read as many directory entries as will fit into the provided 2299fa9e4066Sahrens * buffer from the given directory cursor position (specified in 2300f7170741SWill Andrews * the uio structure). 2301fa9e4066Sahrens * 2302fa9e4066Sahrens * IN: vp - vnode of directory to read. 2303fa9e4066Sahrens * uio - structure supplying read location, range info, 2304fa9e4066Sahrens * and return buffer. 2305fa9e4066Sahrens * cr - credentials of caller. 2306da6c28aaSamw * ct - caller context 2307da6c28aaSamw * flags - case flags 2308fa9e4066Sahrens * 2309fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 2310fa9e4066Sahrens * eofp - set to true if end-of-file detected. 2311fa9e4066Sahrens * 2312f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 2313fa9e4066Sahrens * 2314fa9e4066Sahrens * Timestamps: 2315fa9e4066Sahrens * vp - atime updated 2316fa9e4066Sahrens * 2317fa9e4066Sahrens * Note that the low 4 bits of the cookie returned by zap is always zero. 2318fa9e4066Sahrens * This allows us to use the low range for "special" directory entries: 2319fa9e4066Sahrens * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 2320fa9e4066Sahrens * we use the offset 2 for the '.zfs' directory. 2321fa9e4066Sahrens */ 2322fa9e4066Sahrens /* ARGSUSED */ 2323fa9e4066Sahrens static int 2324da6c28aaSamw zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, 2325da6c28aaSamw caller_context_t *ct, int flags) 2326fa9e4066Sahrens { 2327fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2328fa9e4066Sahrens iovec_t *iovp; 2329da6c28aaSamw edirent_t *eodp; 2330fa9e4066Sahrens dirent64_t *odp; 2331fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 23327f6e3e7dSperrin objset_t *os; 2333fa9e4066Sahrens caddr_t outbuf; 2334fa9e4066Sahrens size_t bufsize; 2335fa9e4066Sahrens zap_cursor_t zc; 2336fa9e4066Sahrens zap_attribute_t zap; 2337fa9e4066Sahrens uint_t bytes_wanted; 2338fa9e4066Sahrens uint64_t offset; /* must be unsigned; checks for < 1 */ 23390a586ceaSMark Shellenbaum uint64_t parent; 2340fa9e4066Sahrens int local_eof; 23417f6e3e7dSperrin int outcount; 23427f6e3e7dSperrin int error; 23437f6e3e7dSperrin uint8_t prefetch; 2344b38f0970Sck boolean_t check_sysattrs; 2345fa9e4066Sahrens 23463cb34c60Sahrens ZFS_ENTER(zfsvfs); 23473cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2348fa9e4066Sahrens 23490a586ceaSMark Shellenbaum if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), 23500a586ceaSMark Shellenbaum &parent, sizeof (parent))) != 0) { 23510a586ceaSMark Shellenbaum ZFS_EXIT(zfsvfs); 23520a586ceaSMark Shellenbaum return (error); 23530a586ceaSMark Shellenbaum } 23540a586ceaSMark Shellenbaum 2355fa9e4066Sahrens /* 2356fa9e4066Sahrens * If we are not given an eof variable, 2357fa9e4066Sahrens * use a local one. 2358fa9e4066Sahrens */ 2359fa9e4066Sahrens if (eofp == NULL) 2360fa9e4066Sahrens eofp = &local_eof; 2361fa9e4066Sahrens 2362fa9e4066Sahrens /* 2363fa9e4066Sahrens * Check for valid iov_len. 2364fa9e4066Sahrens */ 2365fa9e4066Sahrens if (uio->uio_iov->iov_len <= 0) { 2366fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2367be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 2368fa9e4066Sahrens } 2369fa9e4066Sahrens 2370fa9e4066Sahrens /* 2371fa9e4066Sahrens * Quit if directory has been removed (posix) 2372fa9e4066Sahrens */ 2373893a6d32Sahrens if ((*eofp = zp->z_unlinked) != 0) { 2374fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2375fa9e4066Sahrens return (0); 2376fa9e4066Sahrens } 2377fa9e4066Sahrens 23787f6e3e7dSperrin error = 0; 23797f6e3e7dSperrin os = zfsvfs->z_os; 23807f6e3e7dSperrin offset = uio->uio_loffset; 23817f6e3e7dSperrin prefetch = zp->z_zn_prefetch; 23827f6e3e7dSperrin 2383fa9e4066Sahrens /* 2384fa9e4066Sahrens * Initialize the iterator cursor. 2385fa9e4066Sahrens */ 2386fa9e4066Sahrens if (offset <= 3) { 2387fa9e4066Sahrens /* 2388fa9e4066Sahrens * Start iteration from the beginning of the directory. 2389fa9e4066Sahrens */ 23907f6e3e7dSperrin zap_cursor_init(&zc, os, zp->z_id); 2391fa9e4066Sahrens } else { 2392fa9e4066Sahrens /* 2393fa9e4066Sahrens * The offset is a serialized cursor. 2394fa9e4066Sahrens */ 23957f6e3e7dSperrin zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 2396fa9e4066Sahrens } 2397fa9e4066Sahrens 2398fa9e4066Sahrens /* 2399fa9e4066Sahrens * Get space to change directory entries into fs independent format. 2400fa9e4066Sahrens */ 2401fa9e4066Sahrens iovp = uio->uio_iov; 2402fa9e4066Sahrens bytes_wanted = iovp->iov_len; 2403fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 2404fa9e4066Sahrens bufsize = bytes_wanted; 2405fa9e4066Sahrens outbuf = kmem_alloc(bufsize, KM_SLEEP); 2406fa9e4066Sahrens odp = (struct dirent64 *)outbuf; 2407fa9e4066Sahrens } else { 2408fa9e4066Sahrens bufsize = bytes_wanted; 2409d5285caeSGeorge Wilson outbuf = NULL; 2410fa9e4066Sahrens odp = (struct dirent64 *)iovp->iov_base; 2411fa9e4066Sahrens } 2412da6c28aaSamw eodp = (struct edirent *)odp; 2413fa9e4066Sahrens 2414b38f0970Sck /* 24159660e5cbSJanice Chang * If this VFS supports the system attribute view interface; and 24169660e5cbSJanice Chang * we're looking at an extended attribute directory; and we care 24179660e5cbSJanice Chang * about normalization conflicts on this vfs; then we must check 24189660e5cbSJanice Chang * for normalization conflicts with the sysattr name space. 2419b38f0970Sck */ 24209660e5cbSJanice Chang check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 2421b38f0970Sck (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm && 2422b38f0970Sck (flags & V_RDDIR_ENTFLAGS); 2423b38f0970Sck 2424fa9e4066Sahrens /* 2425fa9e4066Sahrens * Transform to file-system independent format 2426fa9e4066Sahrens */ 2427fa9e4066Sahrens outcount = 0; 2428fa9e4066Sahrens while (outcount < bytes_wanted) { 2429b1b8ab34Slling ino64_t objnum; 2430b1b8ab34Slling ushort_t reclen; 243197f85387STim Haley off64_t *next = NULL; 2432b1b8ab34Slling 2433fa9e4066Sahrens /* 2434fa9e4066Sahrens * Special case `.', `..', and `.zfs'. 2435fa9e4066Sahrens */ 2436fa9e4066Sahrens if (offset == 0) { 2437fa9e4066Sahrens (void) strcpy(zap.za_name, "."); 2438da6c28aaSamw zap.za_normalization_conflict = 0; 2439b1b8ab34Slling objnum = zp->z_id; 2440fa9e4066Sahrens } else if (offset == 1) { 2441fa9e4066Sahrens (void) strcpy(zap.za_name, ".."); 2442da6c28aaSamw zap.za_normalization_conflict = 0; 24430a586ceaSMark Shellenbaum objnum = parent; 2444fa9e4066Sahrens } else if (offset == 2 && zfs_show_ctldir(zp)) { 2445fa9e4066Sahrens (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 2446da6c28aaSamw zap.za_normalization_conflict = 0; 2447b1b8ab34Slling objnum = ZFSCTL_INO_ROOT; 2448fa9e4066Sahrens } else { 2449fa9e4066Sahrens /* 2450fa9e4066Sahrens * Grab next entry. 2451fa9e4066Sahrens */ 2452fa9e4066Sahrens if (error = zap_cursor_retrieve(&zc, &zap)) { 2453fa9e4066Sahrens if ((*eofp = (error == ENOENT)) != 0) 2454fa9e4066Sahrens break; 2455fa9e4066Sahrens else 2456fa9e4066Sahrens goto update; 2457fa9e4066Sahrens } 2458fa9e4066Sahrens 2459fa9e4066Sahrens if (zap.za_integer_length != 8 || 2460fa9e4066Sahrens zap.za_num_integers != 1) { 2461fa9e4066Sahrens cmn_err(CE_WARN, "zap_readdir: bad directory " 2462fa9e4066Sahrens "entry, obj = %lld, offset = %lld\n", 2463fa9e4066Sahrens (u_longlong_t)zp->z_id, 2464fa9e4066Sahrens (u_longlong_t)offset); 2465be6fd75aSMatthew Ahrens error = SET_ERROR(ENXIO); 2466fa9e4066Sahrens goto update; 2467fa9e4066Sahrens } 2468b1b8ab34Slling 2469b1b8ab34Slling objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); 2470b1b8ab34Slling /* 2471b1b8ab34Slling * MacOS X can extract the object type here such as: 2472b1b8ab34Slling * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); 2473b1b8ab34Slling */ 2474b38f0970Sck 2475b38f0970Sck if (check_sysattrs && !zap.za_normalization_conflict) { 2476b38f0970Sck zap.za_normalization_conflict = 2477b38f0970Sck xattr_sysattr_casechk(zap.za_name); 2478b38f0970Sck } 2479fa9e4066Sahrens } 2480da6c28aaSamw 2481e802abbdSTim Haley if (flags & V_RDDIR_ACCFILTER) { 2482e802abbdSTim Haley /* 2483e802abbdSTim Haley * If we have no access at all, don't include 2484e802abbdSTim Haley * this entry in the returned information 2485e802abbdSTim Haley */ 2486e802abbdSTim Haley znode_t *ezp; 2487e802abbdSTim Haley if (zfs_zget(zp->z_zfsvfs, objnum, &ezp) != 0) 2488e802abbdSTim Haley goto skip_entry; 2489e802abbdSTim Haley if (!zfs_has_access(ezp, cr)) { 2490e802abbdSTim Haley VN_RELE(ZTOV(ezp)); 2491e802abbdSTim Haley goto skip_entry; 2492e802abbdSTim Haley } 2493e802abbdSTim Haley VN_RELE(ZTOV(ezp)); 2494e802abbdSTim Haley } 2495e802abbdSTim Haley 2496da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) 2497da6c28aaSamw reclen = EDIRENT_RECLEN(strlen(zap.za_name)); 2498da6c28aaSamw else 2499da6c28aaSamw reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 2500fa9e4066Sahrens 2501fa9e4066Sahrens /* 2502fa9e4066Sahrens * Will this entry fit in the buffer? 2503fa9e4066Sahrens */ 2504b1b8ab34Slling if (outcount + reclen > bufsize) { 2505fa9e4066Sahrens /* 2506fa9e4066Sahrens * Did we manage to fit anything in the buffer? 2507fa9e4066Sahrens */ 2508fa9e4066Sahrens if (!outcount) { 2509be6fd75aSMatthew Ahrens error = SET_ERROR(EINVAL); 2510fa9e4066Sahrens goto update; 2511fa9e4066Sahrens } 2512fa9e4066Sahrens break; 2513fa9e4066Sahrens } 2514da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) { 2515da6c28aaSamw /* 2516da6c28aaSamw * Add extended flag entry: 2517da6c28aaSamw */ 2518da6c28aaSamw eodp->ed_ino = objnum; 2519da6c28aaSamw eodp->ed_reclen = reclen; 2520da6c28aaSamw /* NOTE: ed_off is the offset for the *next* entry */ 2521da6c28aaSamw next = &(eodp->ed_off); 2522da6c28aaSamw eodp->ed_eflags = zap.za_normalization_conflict ? 2523da6c28aaSamw ED_CASE_CONFLICT : 0; 2524da6c28aaSamw (void) strncpy(eodp->ed_name, zap.za_name, 2525da6c28aaSamw EDIRENT_NAMELEN(reclen)); 2526da6c28aaSamw eodp = (edirent_t *)((intptr_t)eodp + reclen); 2527da6c28aaSamw } else { 2528da6c28aaSamw /* 2529da6c28aaSamw * Add normal entry: 2530da6c28aaSamw */ 2531da6c28aaSamw odp->d_ino = objnum; 2532da6c28aaSamw odp->d_reclen = reclen; 2533da6c28aaSamw /* NOTE: d_off is the offset for the *next* entry */ 2534da6c28aaSamw next = &(odp->d_off); 2535da6c28aaSamw (void) strncpy(odp->d_name, zap.za_name, 2536da6c28aaSamw DIRENT64_NAMELEN(reclen)); 2537da6c28aaSamw odp = (dirent64_t *)((intptr_t)odp + reclen); 2538da6c28aaSamw } 2539b1b8ab34Slling outcount += reclen; 2540fa9e4066Sahrens 2541fa9e4066Sahrens ASSERT(outcount <= bufsize); 2542fa9e4066Sahrens 2543fa9e4066Sahrens /* Prefetch znode */ 25447f6e3e7dSperrin if (prefetch) 2545a2cdcdd2SPaul Dagnelie dmu_prefetch(os, objnum, 0, 0, 0, 2546a2cdcdd2SPaul Dagnelie ZIO_PRIORITY_SYNC_READ); 2547fa9e4066Sahrens 2548e802abbdSTim Haley skip_entry: 2549fa9e4066Sahrens /* 2550fa9e4066Sahrens * Move to the next entry, fill in the previous offset. 2551fa9e4066Sahrens */ 2552fa9e4066Sahrens if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 2553fa9e4066Sahrens zap_cursor_advance(&zc); 2554fa9e4066Sahrens offset = zap_cursor_serialize(&zc); 2555fa9e4066Sahrens } else { 2556fa9e4066Sahrens offset += 1; 2557fa9e4066Sahrens } 255897f85387STim Haley if (next) 255997f85387STim Haley *next = offset; 2560fa9e4066Sahrens } 25617f6e3e7dSperrin zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 2562fa9e4066Sahrens 2563fa9e4066Sahrens if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 2564fa9e4066Sahrens iovp->iov_base += outcount; 2565fa9e4066Sahrens iovp->iov_len -= outcount; 2566fa9e4066Sahrens uio->uio_resid -= outcount; 2567fa9e4066Sahrens } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 2568fa9e4066Sahrens /* 2569fa9e4066Sahrens * Reset the pointer. 2570fa9e4066Sahrens */ 2571fa9e4066Sahrens offset = uio->uio_loffset; 2572fa9e4066Sahrens } 2573fa9e4066Sahrens 2574fa9e4066Sahrens update: 257587e5029aSahrens zap_cursor_fini(&zc); 2576fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2577fa9e4066Sahrens kmem_free(outbuf, bufsize); 2578fa9e4066Sahrens 2579fa9e4066Sahrens if (error == ENOENT) 2580fa9e4066Sahrens error = 0; 2581fa9e4066Sahrens 2582fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2583fa9e4066Sahrens 2584fa9e4066Sahrens uio->uio_loffset = offset; 2585fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2586fa9e4066Sahrens return (error); 2587fa9e4066Sahrens } 2588fa9e4066Sahrens 2589ec533521Sfr ulong_t zfs_fsync_sync_cnt = 4; 2590ec533521Sfr 2591fa9e4066Sahrens static int 2592da6c28aaSamw zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 2593fa9e4066Sahrens { 2594fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2595fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2596fa9e4066Sahrens 2597b468a217Seschrock /* 2598b468a217Seschrock * Regardless of whether this is required for standards conformance, 2599b468a217Seschrock * this is the logical behavior when fsync() is called on a file with 2600b468a217Seschrock * dirty pages. We use B_ASYNC since the ZIL transactions are already 2601b468a217Seschrock * going to be pushed out as part of the zil_commit(). 2602b468a217Seschrock */ 2603b468a217Seschrock if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && 2604b468a217Seschrock (vp->v_type == VREG) && !(IS_SWAPVP(vp))) 2605da6c28aaSamw (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr, ct); 2606b468a217Seschrock 2607ec533521Sfr (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt); 2608ec533521Sfr 260955da60b9SMark J Musante if (zfsvfs->z_os->os_sync != ZFS_SYNC_DISABLED) { 261055da60b9SMark J Musante ZFS_ENTER(zfsvfs); 261155da60b9SMark J Musante ZFS_VERIFY_ZP(zp); 26125002558fSNeil Perrin zil_commit(zfsvfs->z_log, zp->z_id); 261355da60b9SMark J Musante ZFS_EXIT(zfsvfs); 261455da60b9SMark J Musante } 2615fa9e4066Sahrens return (0); 2616fa9e4066Sahrens } 2617fa9e4066Sahrens 2618da6c28aaSamw 2619fa9e4066Sahrens /* 2620fa9e4066Sahrens * Get the requested file attributes and place them in the provided 2621fa9e4066Sahrens * vattr structure. 2622fa9e4066Sahrens * 2623fa9e4066Sahrens * IN: vp - vnode of file. 2624fa9e4066Sahrens * vap - va_mask identifies requested attributes. 2625da6c28aaSamw * If AT_XVATTR set, then optional attrs are requested 2626da6c28aaSamw * flags - ATTR_NOACLCHECK (CIFS server context) 2627fa9e4066Sahrens * cr - credentials of caller. 2628da6c28aaSamw * ct - caller context 2629fa9e4066Sahrens * 2630fa9e4066Sahrens * OUT: vap - attribute values. 2631fa9e4066Sahrens * 2632f7170741SWill Andrews * RETURN: 0 (always succeeds). 2633fa9e4066Sahrens */ 2634fa9e4066Sahrens /* ARGSUSED */ 2635fa9e4066Sahrens static int 2636da6c28aaSamw zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2637da6c28aaSamw caller_context_t *ct) 2638fa9e4066Sahrens { 2639fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2640fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2641da6c28aaSamw int error = 0; 2642ecd6cf80Smarks uint64_t links; 26430a586ceaSMark Shellenbaum uint64_t mtime[2], ctime[2]; 2644da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2645da6c28aaSamw xoptattr_t *xoap = NULL; 2646da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 26470a586ceaSMark Shellenbaum sa_bulk_attr_t bulk[2]; 26480a586ceaSMark Shellenbaum int count = 0; 2649fa9e4066Sahrens 26503cb34c60Sahrens ZFS_ENTER(zfsvfs); 26513cb34c60Sahrens ZFS_VERIFY_ZP(zp); 26520a586ceaSMark Shellenbaum 2653f1696b23SMark Shellenbaum zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid); 2654f1696b23SMark Shellenbaum 26550a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, &mtime, 16); 26560a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, &ctime, 16); 26570a586ceaSMark Shellenbaum 26580a586ceaSMark Shellenbaum if ((error = sa_bulk_lookup(zp->z_sa_hdl, bulk, count)) != 0) { 26590a586ceaSMark Shellenbaum ZFS_EXIT(zfsvfs); 26600a586ceaSMark Shellenbaum return (error); 26610a586ceaSMark Shellenbaum } 2662fa9e4066Sahrens 2663da6c28aaSamw /* 2664da6c28aaSamw * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 2665da6c28aaSamw * Also, if we are the owner don't bother, since owner should 2666da6c28aaSamw * always be allowed to read basic attributes of file. 2667da6c28aaSamw */ 2668f1696b23SMark Shellenbaum if (!(zp->z_pflags & ZFS_ACL_TRIVIAL) && 2669f1696b23SMark Shellenbaum (vap->va_uid != crgetuid(cr))) { 2670da6c28aaSamw if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0, 2671da6c28aaSamw skipaclchk, cr)) { 2672da6c28aaSamw ZFS_EXIT(zfsvfs); 2673da6c28aaSamw return (error); 2674da6c28aaSamw } 2675da6c28aaSamw } 2676da6c28aaSamw 2677fa9e4066Sahrens /* 2678fa9e4066Sahrens * Return all attributes. It's cheaper to provide the answer 2679fa9e4066Sahrens * than to determine whether we were asked the question. 2680fa9e4066Sahrens */ 2681fa9e4066Sahrens 268234f345efSRay Hassan mutex_enter(&zp->z_lock); 2683fa9e4066Sahrens vap->va_type = vp->v_type; 26840a586ceaSMark Shellenbaum vap->va_mode = zp->z_mode & MODEMASK; 2685fa9e4066Sahrens vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 2686fa9e4066Sahrens vap->va_nodeid = zp->z_id; 2687ecd6cf80Smarks if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp)) 26880a586ceaSMark Shellenbaum links = zp->z_links + 1; 2689ecd6cf80Smarks else 26900a586ceaSMark Shellenbaum links = zp->z_links; 2691ecd6cf80Smarks vap->va_nlink = MIN(links, UINT32_MAX); /* nlink_t limit! */ 26920a586ceaSMark Shellenbaum vap->va_size = zp->z_size; 269372fc53bcSmarks vap->va_rdev = vp->v_rdev; 2694fa9e4066Sahrens vap->va_seq = zp->z_seq; 2695fa9e4066Sahrens 2696fa9e4066Sahrens /* 2697da6c28aaSamw * Add in any requested optional attributes and the create time. 2698da6c28aaSamw * Also set the corresponding bits in the returned attribute bitmap. 2699fa9e4066Sahrens */ 2700da6c28aaSamw if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) { 2701da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 2702da6c28aaSamw xoap->xoa_archive = 27030a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_ARCHIVE) != 0); 2704da6c28aaSamw XVA_SET_RTN(xvap, XAT_ARCHIVE); 2705da6c28aaSamw } 2706da6c28aaSamw 2707da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 2708da6c28aaSamw xoap->xoa_readonly = 27090a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_READONLY) != 0); 2710da6c28aaSamw XVA_SET_RTN(xvap, XAT_READONLY); 2711da6c28aaSamw } 2712da6c28aaSamw 2713da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 2714da6c28aaSamw xoap->xoa_system = 27150a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_SYSTEM) != 0); 2716da6c28aaSamw XVA_SET_RTN(xvap, XAT_SYSTEM); 2717da6c28aaSamw } 2718da6c28aaSamw 2719da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 2720da6c28aaSamw xoap->xoa_hidden = 27210a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_HIDDEN) != 0); 2722da6c28aaSamw XVA_SET_RTN(xvap, XAT_HIDDEN); 2723da6c28aaSamw } 2724da6c28aaSamw 2725da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2726da6c28aaSamw xoap->xoa_nounlink = 27270a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_NOUNLINK) != 0); 2728da6c28aaSamw XVA_SET_RTN(xvap, XAT_NOUNLINK); 2729da6c28aaSamw } 2730da6c28aaSamw 2731da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2732da6c28aaSamw xoap->xoa_immutable = 27330a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_IMMUTABLE) != 0); 2734da6c28aaSamw XVA_SET_RTN(xvap, XAT_IMMUTABLE); 2735da6c28aaSamw } 2736da6c28aaSamw 2737da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2738da6c28aaSamw xoap->xoa_appendonly = 27390a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_APPENDONLY) != 0); 2740da6c28aaSamw XVA_SET_RTN(xvap, XAT_APPENDONLY); 2741da6c28aaSamw } 2742da6c28aaSamw 2743da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2744da6c28aaSamw xoap->xoa_nodump = 27450a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_NODUMP) != 0); 2746da6c28aaSamw XVA_SET_RTN(xvap, XAT_NODUMP); 2747da6c28aaSamw } 2748da6c28aaSamw 2749da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 2750da6c28aaSamw xoap->xoa_opaque = 27510a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_OPAQUE) != 0); 2752da6c28aaSamw XVA_SET_RTN(xvap, XAT_OPAQUE); 2753da6c28aaSamw } 2754da6c28aaSamw 2755da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2756da6c28aaSamw xoap->xoa_av_quarantined = 27570a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0); 2758da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 2759da6c28aaSamw } 2760da6c28aaSamw 2761da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2762da6c28aaSamw xoap->xoa_av_modified = 27630a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_AV_MODIFIED) != 0); 2764da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 2765da6c28aaSamw } 2766da6c28aaSamw 2767da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) && 27680a586ceaSMark Shellenbaum vp->v_type == VREG) { 27690a586ceaSMark Shellenbaum zfs_sa_get_scanstamp(zp, xvap); 2770da6c28aaSamw } 2771da6c28aaSamw 2772da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 27730a586ceaSMark Shellenbaum uint64_t times[2]; 27740a586ceaSMark Shellenbaum 27750a586ceaSMark Shellenbaum (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_CRTIME(zfsvfs), 27760a586ceaSMark Shellenbaum times, sizeof (times)); 27770a586ceaSMark Shellenbaum ZFS_TIME_DECODE(&xoap->xoa_createtime, times); 2778da6c28aaSamw XVA_SET_RTN(xvap, XAT_CREATETIME); 2779fa9e4066Sahrens } 27807a286c47SDai Ngo 27817a286c47SDai Ngo if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { 27820a586ceaSMark Shellenbaum xoap->xoa_reparse = ((zp->z_pflags & ZFS_REPARSE) != 0); 27837a286c47SDai Ngo XVA_SET_RTN(xvap, XAT_REPARSE); 27847a286c47SDai Ngo } 278599d5e173STim Haley if (XVA_ISSET_REQ(xvap, XAT_GEN)) { 278699d5e173STim Haley xoap->xoa_generation = zp->z_gen; 278799d5e173STim Haley XVA_SET_RTN(xvap, XAT_GEN); 278899d5e173STim Haley } 2789fd9ee8b5Sjoyce mcintosh 2790fd9ee8b5Sjoyce mcintosh if (XVA_ISSET_REQ(xvap, XAT_OFFLINE)) { 2791fd9ee8b5Sjoyce mcintosh xoap->xoa_offline = 2792fd9ee8b5Sjoyce mcintosh ((zp->z_pflags & ZFS_OFFLINE) != 0); 2793fd9ee8b5Sjoyce mcintosh XVA_SET_RTN(xvap, XAT_OFFLINE); 2794fd9ee8b5Sjoyce mcintosh } 2795fd9ee8b5Sjoyce mcintosh 2796fd9ee8b5Sjoyce mcintosh if (XVA_ISSET_REQ(xvap, XAT_SPARSE)) { 2797fd9ee8b5Sjoyce mcintosh xoap->xoa_sparse = 2798fd9ee8b5Sjoyce mcintosh ((zp->z_pflags & ZFS_SPARSE) != 0); 2799fd9ee8b5Sjoyce mcintosh XVA_SET_RTN(xvap, XAT_SPARSE); 2800fd9ee8b5Sjoyce mcintosh } 2801f67950b2SNasf-Fan 2802f67950b2SNasf-Fan if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) { 2803f67950b2SNasf-Fan xoap->xoa_projinherit = 2804f67950b2SNasf-Fan ((zp->z_pflags & ZFS_PROJINHERIT) != 0); 2805f67950b2SNasf-Fan XVA_SET_RTN(xvap, XAT_PROJINHERIT); 2806f67950b2SNasf-Fan } 2807f67950b2SNasf-Fan 2808f67950b2SNasf-Fan if (XVA_ISSET_REQ(xvap, XAT_PROJID)) { 2809f67950b2SNasf-Fan xoap->xoa_projid = zp->z_projid; 2810f67950b2SNasf-Fan XVA_SET_RTN(xvap, XAT_PROJID); 2811f67950b2SNasf-Fan } 2812fa9e4066Sahrens } 2813fa9e4066Sahrens 28140a586ceaSMark Shellenbaum ZFS_TIME_DECODE(&vap->va_atime, zp->z_atime); 28150a586ceaSMark Shellenbaum ZFS_TIME_DECODE(&vap->va_mtime, mtime); 28160a586ceaSMark Shellenbaum ZFS_TIME_DECODE(&vap->va_ctime, ctime); 2817da6c28aaSamw 2818fa9e4066Sahrens mutex_exit(&zp->z_lock); 2819fa9e4066Sahrens 28200a586ceaSMark Shellenbaum sa_object_size(zp->z_sa_hdl, &vap->va_blksize, &vap->va_nblocks); 2821fa9e4066Sahrens 2822fa9e4066Sahrens if (zp->z_blksz == 0) { 2823fa9e4066Sahrens /* 2824fa9e4066Sahrens * Block size hasn't been set; suggest maximal I/O transfers. 2825fa9e4066Sahrens */ 2826fa9e4066Sahrens vap->va_blksize = zfsvfs->z_max_blksz; 2827fa9e4066Sahrens } 2828fa9e4066Sahrens 2829fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2830fa9e4066Sahrens return (0); 2831fa9e4066Sahrens } 2832fa9e4066Sahrens 2833f67950b2SNasf-Fan /* 2834f67950b2SNasf-Fan * For the operation of changing file's user/group/project, we need to 2835f67950b2SNasf-Fan * handle not only the main object that is assigned to the file directly, 2836f67950b2SNasf-Fan * but also the ones that are used by the file via hidden xattr directory. 2837f67950b2SNasf-Fan * 2838f67950b2SNasf-Fan * Because the xattr directory may contain many EA entries, it may be 2839f67950b2SNasf-Fan * impossible to change all of them in the same transaction as changing the 2840f67950b2SNasf-Fan * main object's user/group/project attributes. If so, we have to change them 2841f67950b2SNasf-Fan * via other multiple independent transactions one by one. It may be not a good 2842f67950b2SNasf-Fan * solution, but we have no better idea yet. 2843f67950b2SNasf-Fan */ 2844f67950b2SNasf-Fan static int 2845f67950b2SNasf-Fan zfs_setattr_dir(znode_t *dzp) 2846f67950b2SNasf-Fan { 2847f67950b2SNasf-Fan zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2848f67950b2SNasf-Fan objset_t *os = zfsvfs->z_os; 2849f67950b2SNasf-Fan zap_cursor_t zc; 2850f67950b2SNasf-Fan zap_attribute_t zap; 2851f67950b2SNasf-Fan zfs_dirlock_t *dl; 2852f67950b2SNasf-Fan znode_t *zp = NULL; 2853f67950b2SNasf-Fan dmu_tx_t *tx = NULL; 2854f67950b2SNasf-Fan sa_bulk_attr_t bulk[4]; 28555a120e27STim Chase int count; 2856f67950b2SNasf-Fan int err; 2857f67950b2SNasf-Fan 2858f67950b2SNasf-Fan zap_cursor_init(&zc, os, dzp->z_id); 2859f67950b2SNasf-Fan while ((err = zap_cursor_retrieve(&zc, &zap)) == 0) { 28605a120e27STim Chase count = 0; 2861f67950b2SNasf-Fan if (zap.za_integer_length != 8 || zap.za_num_integers != 1) { 2862f67950b2SNasf-Fan err = ENXIO; 2863f67950b2SNasf-Fan break; 2864f67950b2SNasf-Fan } 2865f67950b2SNasf-Fan 2866f67950b2SNasf-Fan err = zfs_dirent_lock(&dl, dzp, (char *)zap.za_name, &zp, 2867f67950b2SNasf-Fan ZEXISTS, NULL, NULL); 2868f67950b2SNasf-Fan if (err == ENOENT) 2869f67950b2SNasf-Fan goto next; 2870f67950b2SNasf-Fan if (err) 2871f67950b2SNasf-Fan break; 2872f67950b2SNasf-Fan 2873f67950b2SNasf-Fan if (zp->z_uid == dzp->z_uid && 2874f67950b2SNasf-Fan zp->z_gid == dzp->z_gid && 2875f67950b2SNasf-Fan zp->z_projid == dzp->z_projid) 2876f67950b2SNasf-Fan goto next; 2877f67950b2SNasf-Fan 2878f67950b2SNasf-Fan tx = dmu_tx_create(os); 2879f67950b2SNasf-Fan if (!(zp->z_pflags & ZFS_PROJID)) 2880f67950b2SNasf-Fan dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 2881f67950b2SNasf-Fan else 2882f67950b2SNasf-Fan dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 2883f67950b2SNasf-Fan 2884f67950b2SNasf-Fan err = dmu_tx_assign(tx, TXG_WAIT); 2885f67950b2SNasf-Fan if (err) 2886f67950b2SNasf-Fan break; 2887f67950b2SNasf-Fan 2888f67950b2SNasf-Fan mutex_enter(&dzp->z_lock); 2889f67950b2SNasf-Fan 2890f67950b2SNasf-Fan if (zp->z_uid != dzp->z_uid) { 2891f67950b2SNasf-Fan zp->z_uid = dzp->z_uid; 2892f67950b2SNasf-Fan SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, 2893f67950b2SNasf-Fan &dzp->z_uid, sizeof (dzp->z_uid)); 2894f67950b2SNasf-Fan } 2895f67950b2SNasf-Fan 2896f67950b2SNasf-Fan if (zp->z_gid != dzp->z_gid) { 2897f67950b2SNasf-Fan zp->z_gid = dzp->z_gid; 2898f67950b2SNasf-Fan SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), NULL, 2899f67950b2SNasf-Fan &dzp->z_gid, sizeof (dzp->z_gid)); 2900f67950b2SNasf-Fan } 2901f67950b2SNasf-Fan 2902f67950b2SNasf-Fan if (zp->z_projid != dzp->z_projid) { 2903f67950b2SNasf-Fan if (!(zp->z_pflags & ZFS_PROJID)) { 2904f67950b2SNasf-Fan zp->z_pflags |= ZFS_PROJID; 2905f67950b2SNasf-Fan SA_ADD_BULK_ATTR(bulk, count, 2906f67950b2SNasf-Fan SA_ZPL_FLAGS(zfsvfs), NULL, &zp->z_pflags, 2907f67950b2SNasf-Fan sizeof (zp->z_pflags)); 2908f67950b2SNasf-Fan } 2909f67950b2SNasf-Fan 2910f67950b2SNasf-Fan zp->z_projid = dzp->z_projid; 2911f67950b2SNasf-Fan SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PROJID(zfsvfs), 2912f67950b2SNasf-Fan NULL, &zp->z_projid, sizeof (zp->z_projid)); 2913f67950b2SNasf-Fan } 2914f67950b2SNasf-Fan 2915f67950b2SNasf-Fan mutex_exit(&dzp->z_lock); 2916f67950b2SNasf-Fan 2917f67950b2SNasf-Fan if (likely(count > 0)) { 2918f67950b2SNasf-Fan err = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); 2919f67950b2SNasf-Fan dmu_tx_commit(tx); 2920f67950b2SNasf-Fan } else { 2921f67950b2SNasf-Fan dmu_tx_abort(tx); 2922f67950b2SNasf-Fan } 2923f67950b2SNasf-Fan tx = NULL; 2924f67950b2SNasf-Fan if (err != 0 && err != ENOENT) 2925f67950b2SNasf-Fan break; 2926f67950b2SNasf-Fan 2927f67950b2SNasf-Fan next: 2928f67950b2SNasf-Fan if (zp) { 2929f67950b2SNasf-Fan VN_RELE(ZTOV(zp)); 2930f67950b2SNasf-Fan zp = NULL; 2931f67950b2SNasf-Fan zfs_dirent_unlock(dl); 2932f67950b2SNasf-Fan } 2933f67950b2SNasf-Fan zap_cursor_advance(&zc); 2934f67950b2SNasf-Fan } 2935f67950b2SNasf-Fan 2936f67950b2SNasf-Fan if (tx) 2937f67950b2SNasf-Fan dmu_tx_abort(tx); 2938f67950b2SNasf-Fan if (zp) { 2939f67950b2SNasf-Fan VN_RELE(ZTOV(zp)); 2940f67950b2SNasf-Fan zfs_dirent_unlock(dl); 2941f67950b2SNasf-Fan } 2942f67950b2SNasf-Fan zap_cursor_fini(&zc); 2943f67950b2SNasf-Fan 2944f67950b2SNasf-Fan return (err == ENOENT ? 0 : err); 2945f67950b2SNasf-Fan } 2946f67950b2SNasf-Fan 2947fa9e4066Sahrens /* 2948fa9e4066Sahrens * Set the file attributes to the values contained in the 2949fa9e4066Sahrens * vattr structure. 2950fa9e4066Sahrens * 2951fa9e4066Sahrens * IN: vp - vnode of file to be modified. 2952fa9e4066Sahrens * vap - new attribute values. 2953da6c28aaSamw * If AT_XVATTR set, then optional attrs are being set 2954fa9e4066Sahrens * flags - ATTR_UTIME set if non-default time values provided. 2955da6c28aaSamw * - ATTR_NOACLCHECK (CIFS context only). 2956fa9e4066Sahrens * cr - credentials of caller. 2957da6c28aaSamw * ct - caller context 2958fa9e4066Sahrens * 2959f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 2960fa9e4066Sahrens * 2961fa9e4066Sahrens * Timestamps: 2962fa9e4066Sahrens * vp - ctime updated, mtime updated if size changed. 2963fa9e4066Sahrens */ 2964fa9e4066Sahrens /* ARGSUSED */ 2965fa9e4066Sahrens static int 2966fa9e4066Sahrens zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2967f7170741SWill Andrews caller_context_t *ct) 2968fa9e4066Sahrens { 2969f18faf3fSek znode_t *zp = VTOZ(vp); 2970fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2971f67950b2SNasf-Fan objset_t *os = zfsvfs->z_os; 2972f18faf3fSek zilog_t *zilog; 2973fa9e4066Sahrens dmu_tx_t *tx; 2974fa9e4066Sahrens vattr_t oldva; 2975ae4caef8SMark Shellenbaum xvattr_t tmpxvattr; 29765730cc9aSmaybee uint_t mask = vap->va_mask; 2977d5285caeSGeorge Wilson uint_t saved_mask = 0; 2978f92daba9Smarks int trim_mask = 0; 2979fa9e4066Sahrens uint64_t new_mode; 298089459e17SMark Shellenbaum uint64_t new_uid, new_gid; 29810b2a8171SMark Shellenbaum uint64_t xattr_obj; 29820a586ceaSMark Shellenbaum uint64_t mtime[2], ctime[2]; 2983f67950b2SNasf-Fan uint64_t projid = ZFS_INVALID_PROJID; 2984d2443e76Smarks znode_t *attrzp; 2985fa9e4066Sahrens int need_policy = FALSE; 2986f67950b2SNasf-Fan int err, err2 = 0; 2987da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 2988da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2989da6c28aaSamw xoptattr_t *xoap; 29900b2a8171SMark Shellenbaum zfs_acl_t *aclp; 2991da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 29920a586ceaSMark Shellenbaum boolean_t fuid_dirtied = B_FALSE; 2993f67950b2SNasf-Fan boolean_t handle_eadir = B_FALSE; 2994f67950b2SNasf-Fan sa_bulk_attr_t bulk[8], xattr_bulk[8]; 29950a586ceaSMark Shellenbaum int count = 0, xattr_count = 0; 2996fa9e4066Sahrens 2997fa9e4066Sahrens if (mask == 0) 2998fa9e4066Sahrens return (0); 2999fa9e4066Sahrens 3000fa9e4066Sahrens if (mask & AT_NOSET) 3001be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3002fa9e4066Sahrens 30033cb34c60Sahrens ZFS_ENTER(zfsvfs); 30043cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3005da6c28aaSamw 3006f67950b2SNasf-Fan /* 3007f67950b2SNasf-Fan * If this is a xvattr_t, then get a pointer to the structure of 3008f67950b2SNasf-Fan * optional attributes. If this is NULL, then we have a vattr_t. 3009f67950b2SNasf-Fan */ 3010f67950b2SNasf-Fan xoap = xva_getxoptattr(xvap); 3011f67950b2SNasf-Fan if (xoap != NULL && (mask & AT_XVATTR)) { 3012f67950b2SNasf-Fan if (XVA_ISSET_REQ(xvap, XAT_PROJID)) { 3013f67950b2SNasf-Fan if (!dmu_objset_projectquota_enabled(os) || 3014f67950b2SNasf-Fan (vp->v_type != VREG && vp->v_type != VDIR)) { 3015f67950b2SNasf-Fan ZFS_EXIT(zfsvfs); 3016f67950b2SNasf-Fan return (SET_ERROR(ENOTSUP)); 3017f67950b2SNasf-Fan } 3018f67950b2SNasf-Fan 3019f67950b2SNasf-Fan projid = xoap->xoa_projid; 3020f67950b2SNasf-Fan if (unlikely(projid == ZFS_INVALID_PROJID)) { 3021f67950b2SNasf-Fan ZFS_EXIT(zfsvfs); 3022f67950b2SNasf-Fan return (SET_ERROR(EINVAL)); 3023f67950b2SNasf-Fan } 3024f67950b2SNasf-Fan 3025f67950b2SNasf-Fan if (projid == zp->z_projid && zp->z_pflags & ZFS_PROJID) 3026f67950b2SNasf-Fan projid = ZFS_INVALID_PROJID; 3027f67950b2SNasf-Fan else 3028f67950b2SNasf-Fan need_policy = TRUE; 3029f67950b2SNasf-Fan } 3030f67950b2SNasf-Fan 3031f67950b2SNasf-Fan if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT) && 3032f67950b2SNasf-Fan (!dmu_objset_projectquota_enabled(os) || 3033f67950b2SNasf-Fan (vp->v_type != VREG && vp->v_type != VDIR))) { 3034f67950b2SNasf-Fan ZFS_EXIT(zfsvfs); 3035f67950b2SNasf-Fan return (SET_ERROR(ENOTSUP)); 3036f67950b2SNasf-Fan } 3037f67950b2SNasf-Fan } 3038f67950b2SNasf-Fan 3039da6c28aaSamw zilog = zfsvfs->z_log; 3040da6c28aaSamw 3041da6c28aaSamw /* 3042da6c28aaSamw * Make sure that if we have ephemeral uid/gid or xvattr specified 3043da6c28aaSamw * that file system is at proper version level 3044da6c28aaSamw */ 3045da6c28aaSamw 3046da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 3047da6c28aaSamw (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 3048da6c28aaSamw ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) || 304902dcba3bStimh (mask & AT_XVATTR))) { 305002dcba3bStimh ZFS_EXIT(zfsvfs); 3051be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 305202dcba3bStimh } 3053da6c28aaSamw 305402dcba3bStimh if (mask & AT_SIZE && vp->v_type == VDIR) { 305502dcba3bStimh ZFS_EXIT(zfsvfs); 3056be6fd75aSMatthew Ahrens return (SET_ERROR(EISDIR)); 305702dcba3bStimh } 3058fa9e4066Sahrens 305902dcba3bStimh if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) { 306002dcba3bStimh ZFS_EXIT(zfsvfs); 3061be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 306202dcba3bStimh } 306384c5a155Smarks 3064ae4caef8SMark Shellenbaum xva_init(&tmpxvattr); 3065ae4caef8SMark Shellenbaum 3066da6c28aaSamw /* 3067da6c28aaSamw * Immutable files can only alter immutable bit and atime 3068da6c28aaSamw */ 30690a586ceaSMark Shellenbaum if ((zp->z_pflags & ZFS_IMMUTABLE) && 3070da6c28aaSamw ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) || 307102dcba3bStimh ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { 307202dcba3bStimh ZFS_EXIT(zfsvfs); 3073be6fd75aSMatthew Ahrens return (SET_ERROR(EPERM)); 307402dcba3bStimh } 3075da6c28aaSamw 30762889ec41SGordon Ross /* 30772889ec41SGordon Ross * Note: ZFS_READONLY is handled in zfs_zaccess_common. 30782889ec41SGordon Ross */ 3079fa9e4066Sahrens 308093129341Smarks /* 308193129341Smarks * Verify timestamps doesn't overflow 32 bits. 308293129341Smarks * ZFS can handle large timestamps, but 32bit syscalls can't 308393129341Smarks * handle times greater than 2039. This check should be removed 308493129341Smarks * once large timestamps are fully supported. 308593129341Smarks */ 308693129341Smarks if (mask & (AT_ATIME | AT_MTIME)) { 308793129341Smarks if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || 308893129341Smarks ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { 308993129341Smarks ZFS_EXIT(zfsvfs); 3090be6fd75aSMatthew Ahrens return (SET_ERROR(EOVERFLOW)); 309193129341Smarks } 309293129341Smarks } 309393129341Smarks 3094fa9e4066Sahrens top: 3095d2443e76Smarks attrzp = NULL; 30960b2a8171SMark Shellenbaum aclp = NULL; 3097fa9e4066Sahrens 3098d47621a4STim Haley /* Can this be moved to before the top label? */ 3099fa9e4066Sahrens if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 3100fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3101be6fd75aSMatthew Ahrens return (SET_ERROR(EROFS)); 3102fa9e4066Sahrens } 3103fa9e4066Sahrens 3104fa9e4066Sahrens /* 3105fa9e4066Sahrens * First validate permissions 3106fa9e4066Sahrens */ 3107fa9e4066Sahrens 3108fa9e4066Sahrens if (mask & AT_SIZE) { 3109da6c28aaSamw err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr); 3110fa9e4066Sahrens if (err) { 3111fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3112fa9e4066Sahrens return (err); 3113fa9e4066Sahrens } 31145730cc9aSmaybee /* 31155730cc9aSmaybee * XXX - Note, we are not providing any open 31165730cc9aSmaybee * mode flags here (like FNDELAY), so we may 31175730cc9aSmaybee * block if there are locks present... this 31185730cc9aSmaybee * should be addressed in openat(). 31195730cc9aSmaybee */ 3120cdb0ab79Smaybee /* XXX - would it be OK to generate a log record here? */ 3121cdb0ab79Smaybee err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 31225730cc9aSmaybee if (err) { 31235730cc9aSmaybee ZFS_EXIT(zfsvfs); 31245730cc9aSmaybee return (err); 31255730cc9aSmaybee } 312672102e74SBryan Cantrill 312772102e74SBryan Cantrill if (vap->va_size == 0) 312872102e74SBryan Cantrill vnevent_truncate(ZTOV(zp), ct); 3129fa9e4066Sahrens } 3130fa9e4066Sahrens 3131da6c28aaSamw if (mask & (AT_ATIME|AT_MTIME) || 3132da6c28aaSamw ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || 3133da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_READONLY) || 3134da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || 3135fd9ee8b5Sjoyce mcintosh XVA_ISSET_REQ(xvap, XAT_OFFLINE) || 3136fd9ee8b5Sjoyce mcintosh XVA_ISSET_REQ(xvap, XAT_SPARSE) || 3137da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_CREATETIME) || 31380a586ceaSMark Shellenbaum XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) { 3139da6c28aaSamw need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, 3140da6c28aaSamw skipaclchk, cr); 31410a586ceaSMark Shellenbaum } 3142fa9e4066Sahrens 3143fa9e4066Sahrens if (mask & (AT_UID|AT_GID)) { 3144fa9e4066Sahrens int idmask = (mask & (AT_UID|AT_GID)); 3145fa9e4066Sahrens int take_owner; 3146fa9e4066Sahrens int take_group; 3147fa9e4066Sahrens 3148a933bc41Smarks /* 3149a933bc41Smarks * NOTE: even if a new mode is being set, 3150a933bc41Smarks * we may clear S_ISUID/S_ISGID bits. 3151a933bc41Smarks */ 3152a933bc41Smarks 3153a933bc41Smarks if (!(mask & AT_MODE)) 31540a586ceaSMark Shellenbaum vap->va_mode = zp->z_mode; 3155a933bc41Smarks 3156fa9e4066Sahrens /* 3157fa9e4066Sahrens * Take ownership or chgrp to group we are a member of 3158fa9e4066Sahrens */ 3159fa9e4066Sahrens 3160fa9e4066Sahrens take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 3161da6c28aaSamw take_group = (mask & AT_GID) && 3162da6c28aaSamw zfs_groupmember(zfsvfs, vap->va_gid, cr); 3163fa9e4066Sahrens 3164fa9e4066Sahrens /* 3165fa9e4066Sahrens * If both AT_UID and AT_GID are set then take_owner and 3166fa9e4066Sahrens * take_group must both be set in order to allow taking 3167fa9e4066Sahrens * ownership. 3168fa9e4066Sahrens * 3169fa9e4066Sahrens * Otherwise, send the check through secpolicy_vnode_setattr() 3170fa9e4066Sahrens * 3171fa9e4066Sahrens */ 3172fa9e4066Sahrens 3173fa9e4066Sahrens if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 3174fa9e4066Sahrens ((idmask == AT_UID) && take_owner) || 3175fa9e4066Sahrens ((idmask == AT_GID) && take_group)) { 3176da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, 3177da6c28aaSamw skipaclchk, cr) == 0) { 3178fa9e4066Sahrens /* 3179fa9e4066Sahrens * Remove setuid/setgid for non-privileged users 3180fa9e4066Sahrens */ 318113f9f30eSmarks secpolicy_setid_clear(vap, cr); 3182f92daba9Smarks trim_mask = (mask & (AT_UID|AT_GID)); 3183fa9e4066Sahrens } else { 3184fa9e4066Sahrens need_policy = TRUE; 3185fa9e4066Sahrens } 3186fa9e4066Sahrens } else { 3187fa9e4066Sahrens need_policy = TRUE; 3188fa9e4066Sahrens } 3189fa9e4066Sahrens } 3190fa9e4066Sahrens 3191f92daba9Smarks mutex_enter(&zp->z_lock); 31920a586ceaSMark Shellenbaum oldva.va_mode = zp->z_mode; 3193f1696b23SMark Shellenbaum zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); 3194da6c28aaSamw if (mask & AT_XVATTR) { 3195ae4caef8SMark Shellenbaum /* 3196ae4caef8SMark Shellenbaum * Update xvattr mask to include only those attributes 3197ae4caef8SMark Shellenbaum * that are actually changing. 3198ae4caef8SMark Shellenbaum * 3199ae4caef8SMark Shellenbaum * the bits will be restored prior to actually setting 3200ae4caef8SMark Shellenbaum * the attributes so the caller thinks they were set. 3201ae4caef8SMark Shellenbaum */ 3202ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 3203ae4caef8SMark Shellenbaum if (xoap->xoa_appendonly != 32040a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_APPENDONLY) != 0)) { 3205ae4caef8SMark Shellenbaum need_policy = TRUE; 3206ae4caef8SMark Shellenbaum } else { 3207ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_APPENDONLY); 3208ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY); 3209ae4caef8SMark Shellenbaum } 3210ae4caef8SMark Shellenbaum } 3211ae4caef8SMark Shellenbaum 3212f67950b2SNasf-Fan if (XVA_ISSET_REQ(xvap, XAT_PROJINHERIT)) { 3213f67950b2SNasf-Fan if (xoap->xoa_projinherit != 3214f67950b2SNasf-Fan ((zp->z_pflags & ZFS_PROJINHERIT) != 0)) { 3215f67950b2SNasf-Fan need_policy = TRUE; 3216f67950b2SNasf-Fan } else { 3217f67950b2SNasf-Fan XVA_CLR_REQ(xvap, XAT_PROJINHERIT); 3218f67950b2SNasf-Fan XVA_SET_REQ(&tmpxvattr, XAT_PROJINHERIT); 3219f67950b2SNasf-Fan } 3220f67950b2SNasf-Fan } 3221f67950b2SNasf-Fan 3222ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 3223ae4caef8SMark Shellenbaum if (xoap->xoa_nounlink != 32240a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_NOUNLINK) != 0)) { 3225ae4caef8SMark Shellenbaum need_policy = TRUE; 3226ae4caef8SMark Shellenbaum } else { 3227ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_NOUNLINK); 3228ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK); 3229ae4caef8SMark Shellenbaum } 3230ae4caef8SMark Shellenbaum } 3231ae4caef8SMark Shellenbaum 3232ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 3233ae4caef8SMark Shellenbaum if (xoap->xoa_immutable != 32340a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_IMMUTABLE) != 0)) { 3235ae4caef8SMark Shellenbaum need_policy = TRUE; 3236ae4caef8SMark Shellenbaum } else { 3237ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_IMMUTABLE); 3238ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE); 3239ae4caef8SMark Shellenbaum } 3240ae4caef8SMark Shellenbaum } 3241ae4caef8SMark Shellenbaum 3242ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 3243ae4caef8SMark Shellenbaum if (xoap->xoa_nodump != 32440a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_NODUMP) != 0)) { 3245ae4caef8SMark Shellenbaum need_policy = TRUE; 3246ae4caef8SMark Shellenbaum } else { 3247ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_NODUMP); 3248ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_NODUMP); 3249ae4caef8SMark Shellenbaum } 3250ae4caef8SMark Shellenbaum } 3251ae4caef8SMark Shellenbaum 3252ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 3253ae4caef8SMark Shellenbaum if (xoap->xoa_av_modified != 32540a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_AV_MODIFIED) != 0)) { 3255ae4caef8SMark Shellenbaum need_policy = TRUE; 3256ae4caef8SMark Shellenbaum } else { 3257ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_AV_MODIFIED); 3258ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED); 3259ae4caef8SMark Shellenbaum } 3260ae4caef8SMark Shellenbaum } 3261ae4caef8SMark Shellenbaum 3262ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 3263ae4caef8SMark Shellenbaum if ((vp->v_type != VREG && 3264ae4caef8SMark Shellenbaum xoap->xoa_av_quarantined) || 3265ae4caef8SMark Shellenbaum xoap->xoa_av_quarantined != 32660a586ceaSMark Shellenbaum ((zp->z_pflags & ZFS_AV_QUARANTINED) != 0)) { 3267ae4caef8SMark Shellenbaum need_policy = TRUE; 3268ae4caef8SMark Shellenbaum } else { 3269ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED); 3270ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED); 3271ae4caef8SMark Shellenbaum } 3272ae4caef8SMark Shellenbaum } 3273ae4caef8SMark Shellenbaum 32747a286c47SDai Ngo if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { 32757a286c47SDai Ngo mutex_exit(&zp->z_lock); 32767a286c47SDai Ngo ZFS_EXIT(zfsvfs); 3277be6fd75aSMatthew Ahrens return (SET_ERROR(EPERM)); 32787a286c47SDai Ngo } 32797a286c47SDai Ngo 3280ae4caef8SMark Shellenbaum if (need_policy == FALSE && 3281ae4caef8SMark Shellenbaum (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) || 3282ae4caef8SMark Shellenbaum XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { 3283da6c28aaSamw need_policy = TRUE; 3284da6c28aaSamw } 3285da6c28aaSamw } 3286da6c28aaSamw 3287f92daba9Smarks mutex_exit(&zp->z_lock); 3288fa9e4066Sahrens 3289f92daba9Smarks if (mask & AT_MODE) { 3290da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) { 3291f92daba9Smarks err = secpolicy_setid_setsticky_clear(vp, vap, 3292f92daba9Smarks &oldva, cr); 3293f92daba9Smarks if (err) { 3294f92daba9Smarks ZFS_EXIT(zfsvfs); 3295f92daba9Smarks return (err); 3296f92daba9Smarks } 3297f92daba9Smarks trim_mask |= AT_MODE; 3298f92daba9Smarks } else { 3299f92daba9Smarks need_policy = TRUE; 3300f92daba9Smarks } 3301f92daba9Smarks } 330213f9f30eSmarks 3303f92daba9Smarks if (need_policy) { 330413f9f30eSmarks /* 330513f9f30eSmarks * If trim_mask is set then take ownership 3306f92daba9Smarks * has been granted or write_acl is present and user 3307f92daba9Smarks * has the ability to modify mode. In that case remove 3308f92daba9Smarks * UID|GID and or MODE from mask so that 330913f9f30eSmarks * secpolicy_vnode_setattr() doesn't revoke it. 331013f9f30eSmarks */ 331113f9f30eSmarks 3312f92daba9Smarks if (trim_mask) { 3313f92daba9Smarks saved_mask = vap->va_mask; 3314f92daba9Smarks vap->va_mask &= ~trim_mask; 3315f92daba9Smarks } 3316fa9e4066Sahrens err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 3317da6c28aaSamw (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp); 3318fa9e4066Sahrens if (err) { 3319fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3320fa9e4066Sahrens return (err); 3321fa9e4066Sahrens } 332213f9f30eSmarks 332313f9f30eSmarks if (trim_mask) 3324f92daba9Smarks vap->va_mask |= saved_mask; 3325fa9e4066Sahrens } 3326fa9e4066Sahrens 3327fa9e4066Sahrens /* 3328fa9e4066Sahrens * secpolicy_vnode_setattr, or take ownership may have 3329fa9e4066Sahrens * changed va_mask 3330fa9e4066Sahrens */ 3331fa9e4066Sahrens mask = vap->va_mask; 3332fa9e4066Sahrens 3333f67950b2SNasf-Fan if ((mask & (AT_UID | AT_GID)) || projid != ZFS_INVALID_PROJID) { 3334f67950b2SNasf-Fan handle_eadir = B_TRUE; 33350b2a8171SMark Shellenbaum err = sa_lookup(zp->z_sa_hdl, SA_ZPL_XATTR(zfsvfs), 33360b2a8171SMark Shellenbaum &xattr_obj, sizeof (xattr_obj)); 33370a586ceaSMark Shellenbaum 33380b2a8171SMark Shellenbaum if (err == 0 && xattr_obj) { 33390a586ceaSMark Shellenbaum err = zfs_zget(zp->z_zfsvfs, xattr_obj, &attrzp); 33400a586ceaSMark Shellenbaum if (err) 33410a586ceaSMark Shellenbaum goto out2; 33420a586ceaSMark Shellenbaum } 33430a586ceaSMark Shellenbaum if (mask & AT_UID) { 33440a586ceaSMark Shellenbaum new_uid = zfs_fuid_create(zfsvfs, 33450a586ceaSMark Shellenbaum (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp); 3346f1696b23SMark Shellenbaum if (new_uid != zp->z_uid && 3347f67950b2SNasf-Fan zfs_id_overquota(zfsvfs, DMU_USERUSED_OBJECT, 3348f67950b2SNasf-Fan new_uid)) { 33490b2a8171SMark Shellenbaum if (attrzp) 33500b2a8171SMark Shellenbaum VN_RELE(ZTOV(attrzp)); 3351be6fd75aSMatthew Ahrens err = SET_ERROR(EDQUOT); 33520a586ceaSMark Shellenbaum goto out2; 33530a586ceaSMark Shellenbaum } 33540a586ceaSMark Shellenbaum } 33550a586ceaSMark Shellenbaum 33560a586ceaSMark Shellenbaum if (mask & AT_GID) { 33570a586ceaSMark Shellenbaum new_gid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid, 33580a586ceaSMark Shellenbaum cr, ZFS_GROUP, &fuidp); 33590a586ceaSMark Shellenbaum if (new_gid != zp->z_gid && 3360f67950b2SNasf-Fan zfs_id_overquota(zfsvfs, DMU_GROUPUSED_OBJECT, 3361f67950b2SNasf-Fan new_gid)) { 33620b2a8171SMark Shellenbaum if (attrzp) 33630b2a8171SMark Shellenbaum VN_RELE(ZTOV(attrzp)); 3364be6fd75aSMatthew Ahrens err = SET_ERROR(EDQUOT); 33650a586ceaSMark Shellenbaum goto out2; 33660a586ceaSMark Shellenbaum } 33670a586ceaSMark Shellenbaum } 3368f67950b2SNasf-Fan 3369f67950b2SNasf-Fan if (projid != ZFS_INVALID_PROJID && 3370f67950b2SNasf-Fan zfs_id_overquota(zfsvfs, DMU_PROJECTUSED_OBJECT, projid)) { 3371f67950b2SNasf-Fan if (attrzp) 3372f67950b2SNasf-Fan VN_RELE(ZTOV(attrzp)); 3373f67950b2SNasf-Fan err = EDQUOT; 3374f67950b2SNasf-Fan goto out2; 3375f67950b2SNasf-Fan } 33760a586ceaSMark Shellenbaum } 3377f67950b2SNasf-Fan tx = dmu_tx_create(os); 3378fa9e4066Sahrens 3379fa9e4066Sahrens if (mask & AT_MODE) { 33800a586ceaSMark Shellenbaum uint64_t pmode = zp->z_mode; 33811412a1a2SMark Shellenbaum uint64_t acl_obj; 3382169cdae2Smarks new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 3383fa9e4066Sahrens 338471dbfc28SPaul B. Henson if (zp->z_zfsvfs->z_acl_mode == ZFS_ACL_RESTRICTED && 338571dbfc28SPaul B. Henson !(zp->z_pflags & ZFS_ACL_TRIVIAL)) { 3386be6fd75aSMatthew Ahrens err = SET_ERROR(EPERM); 338771dbfc28SPaul B. Henson goto out; 338871dbfc28SPaul B. Henson } 338971dbfc28SPaul B. Henson 3390a3c49ce1SAlbert Lee if (err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)) 3391a3c49ce1SAlbert Lee goto out; 33920a586ceaSMark Shellenbaum 33931412a1a2SMark Shellenbaum mutex_enter(&zp->z_lock); 33941412a1a2SMark Shellenbaum if (!zp->z_is_sa && ((acl_obj = zfs_external_acl(zp)) != 0)) { 33950a586ceaSMark Shellenbaum /* 33960a586ceaSMark Shellenbaum * Are we upgrading ACL from old V0 format 33970a586ceaSMark Shellenbaum * to V1 format? 33980a586ceaSMark Shellenbaum */ 33992bd6c4deSMark Shellenbaum if (zfsvfs->z_version >= ZPL_VERSION_FUID && 34001412a1a2SMark Shellenbaum zfs_znode_acl_version(zp) == 3401da6c28aaSamw ZFS_ACL_VERSION_INITIAL) { 34021412a1a2SMark Shellenbaum dmu_tx_hold_free(tx, acl_obj, 0, 3403da6c28aaSamw DMU_OBJECT_END); 3404da6c28aaSamw dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 34054c841f60Smarks 0, aclp->z_acl_bytes); 3406da6c28aaSamw } else { 34071412a1a2SMark Shellenbaum dmu_tx_hold_write(tx, acl_obj, 0, 34084c841f60Smarks aclp->z_acl_bytes); 34094c841f60Smarks } 34100a586ceaSMark Shellenbaum } else if (!zp->z_is_sa && aclp->z_acl_bytes > ZFS_ACE_SPACE) { 34116d38e247Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 34126d38e247Smarks 0, aclp->z_acl_bytes); 3413da6c28aaSamw } 34141412a1a2SMark Shellenbaum mutex_exit(&zp->z_lock); 34150a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 34160a586ceaSMark Shellenbaum } else { 3417f67950b2SNasf-Fan if (((mask & AT_XVATTR) && 3418f67950b2SNasf-Fan XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) || 3419f67950b2SNasf-Fan (projid != ZFS_INVALID_PROJID && 3420f67950b2SNasf-Fan !(zp->z_pflags & ZFS_PROJID))) 34210a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_TRUE); 34220a586ceaSMark Shellenbaum else 34230a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 3424fa9e4066Sahrens } 3425fa9e4066Sahrens 34260a586ceaSMark Shellenbaum if (attrzp) { 34270a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, attrzp->z_sa_hdl, B_FALSE); 3428d2443e76Smarks } 3429d2443e76Smarks 34300a586ceaSMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 34310a586ceaSMark Shellenbaum if (fuid_dirtied) 34320a586ceaSMark Shellenbaum zfs_fuid_txhold(zfsvfs, tx); 34330a586ceaSMark Shellenbaum 34340a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, zp); 34350a586ceaSMark Shellenbaum 3436e722410cSMatthew Ahrens err = dmu_tx_assign(tx, TXG_WAIT); 3437e722410cSMatthew Ahrens if (err) 343814843421SMatthew Ahrens goto out; 3439fa9e4066Sahrens 34400a586ceaSMark Shellenbaum count = 0; 3441fa9e4066Sahrens /* 3442fa9e4066Sahrens * Set each attribute requested. 3443fa9e4066Sahrens * We group settings according to the locks they need to acquire. 3444fa9e4066Sahrens * 3445fa9e4066Sahrens * Note: you cannot set ctime directly, although it will be 3446fa9e4066Sahrens * updated as a side-effect of calling this function. 3447fa9e4066Sahrens */ 3448fa9e4066Sahrens 3449f67950b2SNasf-Fan if (projid != ZFS_INVALID_PROJID && !(zp->z_pflags & ZFS_PROJID)) { 3450f67950b2SNasf-Fan /* 3451f67950b2SNasf-Fan * For the existing object that is upgraded from old system, 3452f67950b2SNasf-Fan * its on-disk layout has no slot for the project ID attribute. 3453f67950b2SNasf-Fan * But quota accounting logic needs to access related slots by 3454f67950b2SNasf-Fan * offset directly. So we need to adjust old objects' layout 3455f67950b2SNasf-Fan * to make the project ID to some unified and fixed offset. 3456f67950b2SNasf-Fan */ 3457f67950b2SNasf-Fan if (attrzp) 3458f67950b2SNasf-Fan err = sa_add_projid(attrzp->z_sa_hdl, tx, projid); 3459f67950b2SNasf-Fan if (err == 0) 3460f67950b2SNasf-Fan err = sa_add_projid(zp->z_sa_hdl, tx, projid); 3461f67950b2SNasf-Fan 3462f67950b2SNasf-Fan if (unlikely(err == EEXIST)) 3463f67950b2SNasf-Fan err = 0; 3464f67950b2SNasf-Fan else if (err != 0) 3465f67950b2SNasf-Fan goto out; 3466f67950b2SNasf-Fan else 3467f67950b2SNasf-Fan projid = ZFS_INVALID_PROJID; 3468f67950b2SNasf-Fan } 34691412a1a2SMark Shellenbaum 34701412a1a2SMark Shellenbaum if (mask & (AT_UID|AT_GID|AT_MODE)) 34711412a1a2SMark Shellenbaum mutex_enter(&zp->z_acl_lock); 3472fa9e4066Sahrens mutex_enter(&zp->z_lock); 3473fa9e4066Sahrens 3474db9986c7SMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, 3475db9986c7SMark Shellenbaum &zp->z_pflags, sizeof (zp->z_pflags)); 3476db9986c7SMark Shellenbaum 3477db9986c7SMark Shellenbaum if (attrzp) { 34781412a1a2SMark Shellenbaum if (mask & (AT_UID|AT_GID|AT_MODE)) 34791412a1a2SMark Shellenbaum mutex_enter(&attrzp->z_acl_lock); 34800a586ceaSMark Shellenbaum mutex_enter(&attrzp->z_lock); 3481db9986c7SMark Shellenbaum SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, 3482db9986c7SMark Shellenbaum SA_ZPL_FLAGS(zfsvfs), NULL, &attrzp->z_pflags, 3483db9986c7SMark Shellenbaum sizeof (attrzp->z_pflags)); 3484f67950b2SNasf-Fan if (projid != ZFS_INVALID_PROJID) { 3485f67950b2SNasf-Fan attrzp->z_projid = projid; 3486f67950b2SNasf-Fan SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, 3487f67950b2SNasf-Fan SA_ZPL_PROJID(zfsvfs), NULL, &attrzp->z_projid, 3488f67950b2SNasf-Fan sizeof (attrzp->z_projid)); 3489f67950b2SNasf-Fan } 3490db9986c7SMark Shellenbaum } 34910a586ceaSMark Shellenbaum 349227dd1e87SMark Shellenbaum if (mask & (AT_UID|AT_GID)) { 349327dd1e87SMark Shellenbaum 349427dd1e87SMark Shellenbaum if (mask & AT_UID) { 349527dd1e87SMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zfsvfs), NULL, 349627dd1e87SMark Shellenbaum &new_uid, sizeof (new_uid)); 3497f1696b23SMark Shellenbaum zp->z_uid = new_uid; 349827dd1e87SMark Shellenbaum if (attrzp) { 349927dd1e87SMark Shellenbaum SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, 350027dd1e87SMark Shellenbaum SA_ZPL_UID(zfsvfs), NULL, &new_uid, 350127dd1e87SMark Shellenbaum sizeof (new_uid)); 3502f1696b23SMark Shellenbaum attrzp->z_uid = new_uid; 350327dd1e87SMark Shellenbaum } 35040a586ceaSMark Shellenbaum } 35050a586ceaSMark Shellenbaum 350627dd1e87SMark Shellenbaum if (mask & AT_GID) { 350727dd1e87SMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GID(zfsvfs), 350827dd1e87SMark Shellenbaum NULL, &new_gid, sizeof (new_gid)); 3509f1696b23SMark Shellenbaum zp->z_gid = new_gid; 351027dd1e87SMark Shellenbaum if (attrzp) { 351127dd1e87SMark Shellenbaum SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, 351227dd1e87SMark Shellenbaum SA_ZPL_GID(zfsvfs), NULL, &new_gid, 351327dd1e87SMark Shellenbaum sizeof (new_gid)); 3514f1696b23SMark Shellenbaum attrzp->z_gid = new_gid; 351527dd1e87SMark Shellenbaum } 351627dd1e87SMark Shellenbaum } 351727dd1e87SMark Shellenbaum if (!(mask & AT_MODE)) { 351827dd1e87SMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), 351927dd1e87SMark Shellenbaum NULL, &new_mode, sizeof (new_mode)); 352027dd1e87SMark Shellenbaum new_mode = zp->z_mode; 352127dd1e87SMark Shellenbaum } 352227dd1e87SMark Shellenbaum err = zfs_acl_chown_setattr(zp); 352327dd1e87SMark Shellenbaum ASSERT(err == 0); 35240a586ceaSMark Shellenbaum if (attrzp) { 352527dd1e87SMark Shellenbaum err = zfs_acl_chown_setattr(attrzp); 352627dd1e87SMark Shellenbaum ASSERT(err == 0); 35270a586ceaSMark Shellenbaum } 35280a586ceaSMark Shellenbaum } 35290a586ceaSMark Shellenbaum 3530fa9e4066Sahrens if (mask & AT_MODE) { 35310a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zfsvfs), NULL, 35320a586ceaSMark Shellenbaum &new_mode, sizeof (new_mode)); 35330a586ceaSMark Shellenbaum zp->z_mode = new_mode; 353427dd1e87SMark Shellenbaum ASSERT3U((uintptr_t)aclp, !=, NULL); 353589459e17SMark Shellenbaum err = zfs_aclset_common(zp, aclp, cr, tx); 3536fb09f5aaSMadhav Suresh ASSERT0(err); 35370b2a8171SMark Shellenbaum if (zp->z_acl_cached) 35380b2a8171SMark Shellenbaum zfs_acl_free(zp->z_acl_cached); 35394929fd5eSTim Haley zp->z_acl_cached = aclp; 35404929fd5eSTim Haley aclp = NULL; 3541fa9e4066Sahrens } 3542fa9e4066Sahrens 3543d2443e76Smarks 35440a586ceaSMark Shellenbaum if (mask & AT_ATIME) { 35450a586ceaSMark Shellenbaum ZFS_TIME_ENCODE(&vap->va_atime, zp->z_atime); 35460a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_ATIME(zfsvfs), NULL, 35470a586ceaSMark Shellenbaum &zp->z_atime, sizeof (zp->z_atime)); 3548d2443e76Smarks } 3549fa9e4066Sahrens 35500a586ceaSMark Shellenbaum if (mask & AT_MTIME) { 35510a586ceaSMark Shellenbaum ZFS_TIME_ENCODE(&vap->va_mtime, mtime); 35520a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, 35530a586ceaSMark Shellenbaum mtime, sizeof (mtime)); 3554d2443e76Smarks } 3555d2443e76Smarks 3556cdb0ab79Smaybee /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */ 35570a586ceaSMark Shellenbaum if (mask & AT_SIZE && !(mask & AT_MTIME)) { 3558db9986c7SMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), 3559db9986c7SMark Shellenbaum NULL, mtime, sizeof (mtime)); 35600a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, 35610a586ceaSMark Shellenbaum &ctime, sizeof (ctime)); 35620a586ceaSMark Shellenbaum zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, 35630a586ceaSMark Shellenbaum B_TRUE); 35640a586ceaSMark Shellenbaum } else if (mask != 0) { 35650a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, 35660a586ceaSMark Shellenbaum &ctime, sizeof (ctime)); 35670a586ceaSMark Shellenbaum zfs_tstamp_update_setup(zp, STATE_CHANGED, mtime, ctime, 35680a586ceaSMark Shellenbaum B_TRUE); 35690a586ceaSMark Shellenbaum if (attrzp) { 35700a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(xattr_bulk, xattr_count, 35710a586ceaSMark Shellenbaum SA_ZPL_CTIME(zfsvfs), NULL, 35720a586ceaSMark Shellenbaum &ctime, sizeof (ctime)); 35730a586ceaSMark Shellenbaum zfs_tstamp_update_setup(attrzp, STATE_CHANGED, 35740a586ceaSMark Shellenbaum mtime, ctime, B_TRUE); 35750a586ceaSMark Shellenbaum } 35760a586ceaSMark Shellenbaum } 3577f67950b2SNasf-Fan 3578f67950b2SNasf-Fan if (projid != ZFS_INVALID_PROJID) { 3579f67950b2SNasf-Fan zp->z_projid = projid; 3580f67950b2SNasf-Fan SA_ADD_BULK_ATTR(bulk, count, 3581f67950b2SNasf-Fan SA_ZPL_PROJID(zfsvfs), NULL, &zp->z_projid, 3582f67950b2SNasf-Fan sizeof (zp->z_projid)); 3583f67950b2SNasf-Fan } 3584f67950b2SNasf-Fan 3585da6c28aaSamw /* 3586da6c28aaSamw * Do this after setting timestamps to prevent timestamp 3587da6c28aaSamw * update from toggling bit 3588da6c28aaSamw */ 3589da6c28aaSamw 3590da6c28aaSamw if (xoap && (mask & AT_XVATTR)) { 3591ae4caef8SMark Shellenbaum 3592ae4caef8SMark Shellenbaum /* 3593ae4caef8SMark Shellenbaum * restore trimmed off masks 3594ae4caef8SMark Shellenbaum * so that return masks can be set for caller. 3595ae4caef8SMark Shellenbaum */ 3596ae4caef8SMark Shellenbaum 3597ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) { 3598ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_APPENDONLY); 3599ae4caef8SMark Shellenbaum } 3600ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) { 3601ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_NOUNLINK); 3602ae4caef8SMark Shellenbaum } 3603ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) { 3604ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_IMMUTABLE); 3605ae4caef8SMark Shellenbaum } 3606ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) { 3607ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_NODUMP); 3608ae4caef8SMark Shellenbaum } 3609ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) { 3610ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_AV_MODIFIED); 3611ae4caef8SMark Shellenbaum } 3612ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) { 3613ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_AV_QUARANTINED); 3614ae4caef8SMark Shellenbaum } 3615f67950b2SNasf-Fan if (XVA_ISSET_REQ(&tmpxvattr, XAT_PROJINHERIT)) { 3616f67950b2SNasf-Fan XVA_SET_REQ(xvap, XAT_PROJINHERIT); 3617f67950b2SNasf-Fan } 3618ae4caef8SMark Shellenbaum 36190a586ceaSMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) 3620da6c28aaSamw ASSERT(vp->v_type == VREG); 3621da6c28aaSamw 36220a586ceaSMark Shellenbaum zfs_xvattr_set(zp, xvap, tx); 3623da6c28aaSamw } 3624fa9e4066Sahrens 362589459e17SMark Shellenbaum if (fuid_dirtied) 362689459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 362789459e17SMark Shellenbaum 36285730cc9aSmaybee if (mask != 0) 3629da6c28aaSamw zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp); 3630fa9e4066Sahrens 3631fa9e4066Sahrens mutex_exit(&zp->z_lock); 36321412a1a2SMark Shellenbaum if (mask & (AT_UID|AT_GID|AT_MODE)) 36331412a1a2SMark Shellenbaum mutex_exit(&zp->z_acl_lock); 3634fa9e4066Sahrens 36351412a1a2SMark Shellenbaum if (attrzp) { 36361412a1a2SMark Shellenbaum if (mask & (AT_UID|AT_GID|AT_MODE)) 36371412a1a2SMark Shellenbaum mutex_exit(&attrzp->z_acl_lock); 36381412a1a2SMark Shellenbaum mutex_exit(&attrzp->z_lock); 36391412a1a2SMark Shellenbaum } 364014843421SMatthew Ahrens out: 3641f67950b2SNasf-Fan if (err == 0 && xattr_count > 0) { 36420a586ceaSMark Shellenbaum err2 = sa_bulk_update(attrzp->z_sa_hdl, xattr_bulk, 36430a586ceaSMark Shellenbaum xattr_count, tx); 36440a586ceaSMark Shellenbaum ASSERT(err2 == 0); 36450a586ceaSMark Shellenbaum } 36460a586ceaSMark Shellenbaum 36474929fd5eSTim Haley if (aclp) 36484929fd5eSTim Haley zfs_acl_free(aclp); 36494929fd5eSTim Haley 365014843421SMatthew Ahrens if (fuidp) { 365114843421SMatthew Ahrens zfs_fuid_info_free(fuidp); 365214843421SMatthew Ahrens fuidp = NULL; 365314843421SMatthew Ahrens } 365414843421SMatthew Ahrens 36550a586ceaSMark Shellenbaum if (err) { 365614843421SMatthew Ahrens dmu_tx_abort(tx); 3657f67950b2SNasf-Fan if (attrzp) 3658f67950b2SNasf-Fan VN_RELE(ZTOV(attrzp)); 36590a586ceaSMark Shellenbaum if (err == ERESTART) 36600a586ceaSMark Shellenbaum goto top; 36610a586ceaSMark Shellenbaum } else { 3662f67950b2SNasf-Fan if (count > 0) 3663f67950b2SNasf-Fan err2 = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); 366414843421SMatthew Ahrens dmu_tx_commit(tx); 3665f67950b2SNasf-Fan if (attrzp) { 3666f67950b2SNasf-Fan if (err2 == 0 && handle_eadir) 3667f67950b2SNasf-Fan err2 = zfs_setattr_dir(attrzp); 3668f67950b2SNasf-Fan VN_RELE(ZTOV(attrzp)); 3669f67950b2SNasf-Fan } 36700a586ceaSMark Shellenbaum } 367114843421SMatthew Ahrens 36720a586ceaSMark Shellenbaum out2: 3673f67950b2SNasf-Fan if (os->os_sync == ZFS_SYNC_ALWAYS) 36745002558fSNeil Perrin zil_commit(zilog, 0); 367555da60b9SMark J Musante 3676fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3677fa9e4066Sahrens return (err); 3678fa9e4066Sahrens } 3679fa9e4066Sahrens 3680fa9e4066Sahrens typedef struct zfs_zlock { 3681fa9e4066Sahrens krwlock_t *zl_rwlock; /* lock we acquired */ 3682fa9e4066Sahrens znode_t *zl_znode; /* znode we held */ 3683fa9e4066Sahrens struct zfs_zlock *zl_next; /* next in list */ 3684fa9e4066Sahrens } zfs_zlock_t; 3685fa9e4066Sahrens 3686ff008e00Smaybee /* 3687ff008e00Smaybee * Drop locks and release vnodes that were held by zfs_rename_lock(). 3688ff008e00Smaybee */ 3689ff008e00Smaybee static void 3690ff008e00Smaybee zfs_rename_unlock(zfs_zlock_t **zlpp) 3691ff008e00Smaybee { 3692ff008e00Smaybee zfs_zlock_t *zl; 3693ff008e00Smaybee 3694ff008e00Smaybee while ((zl = *zlpp) != NULL) { 3695ff008e00Smaybee if (zl->zl_znode != NULL) 3696ff008e00Smaybee VN_RELE(ZTOV(zl->zl_znode)); 3697ff008e00Smaybee rw_exit(zl->zl_rwlock); 3698ff008e00Smaybee *zlpp = zl->zl_next; 3699ff008e00Smaybee kmem_free(zl, sizeof (*zl)); 3700ff008e00Smaybee } 3701ff008e00Smaybee } 3702ff008e00Smaybee 3703ff008e00Smaybee /* 3704ff008e00Smaybee * Search back through the directory tree, using the ".." entries. 3705ff008e00Smaybee * Lock each directory in the chain to prevent concurrent renames. 3706ff008e00Smaybee * Fail any attempt to move a directory into one of its own descendants. 3707ff008e00Smaybee * XXX - z_parent_lock can overlap with map or grow locks 3708ff008e00Smaybee */ 3709fa9e4066Sahrens static int 3710fa9e4066Sahrens zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 3711fa9e4066Sahrens { 3712fa9e4066Sahrens zfs_zlock_t *zl; 3713feb08c6bSbillm znode_t *zp = tdzp; 3714fa9e4066Sahrens uint64_t rootid = zp->z_zfsvfs->z_root; 37150a586ceaSMark Shellenbaum uint64_t oidp = zp->z_id; 3716fa9e4066Sahrens krwlock_t *rwlp = &szp->z_parent_lock; 3717fa9e4066Sahrens krw_t rw = RW_WRITER; 3718fa9e4066Sahrens 3719fa9e4066Sahrens /* 3720fa9e4066Sahrens * First pass write-locks szp and compares to zp->z_id. 3721fa9e4066Sahrens * Later passes read-lock zp and compare to zp->z_parent. 3722fa9e4066Sahrens */ 3723fa9e4066Sahrens do { 3724ff008e00Smaybee if (!rw_tryenter(rwlp, rw)) { 3725ff008e00Smaybee /* 3726ff008e00Smaybee * Another thread is renaming in this path. 3727ff008e00Smaybee * Note that if we are a WRITER, we don't have any 3728ff008e00Smaybee * parent_locks held yet. 3729ff008e00Smaybee */ 3730ff008e00Smaybee if (rw == RW_READER && zp->z_id > szp->z_id) { 3731ff008e00Smaybee /* 3732ff008e00Smaybee * Drop our locks and restart 3733ff008e00Smaybee */ 3734ff008e00Smaybee zfs_rename_unlock(&zl); 3735ff008e00Smaybee *zlpp = NULL; 3736ff008e00Smaybee zp = tdzp; 37370a586ceaSMark Shellenbaum oidp = zp->z_id; 3738ff008e00Smaybee rwlp = &szp->z_parent_lock; 3739ff008e00Smaybee rw = RW_WRITER; 3740ff008e00Smaybee continue; 3741ff008e00Smaybee } else { 3742ff008e00Smaybee /* 3743ff008e00Smaybee * Wait for other thread to drop its locks 3744ff008e00Smaybee */ 3745ff008e00Smaybee rw_enter(rwlp, rw); 3746ff008e00Smaybee } 3747ff008e00Smaybee } 3748ff008e00Smaybee 3749fa9e4066Sahrens zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 3750fa9e4066Sahrens zl->zl_rwlock = rwlp; 3751fa9e4066Sahrens zl->zl_znode = NULL; 3752fa9e4066Sahrens zl->zl_next = *zlpp; 3753fa9e4066Sahrens *zlpp = zl; 3754fa9e4066Sahrens 37550a586ceaSMark Shellenbaum if (oidp == szp->z_id) /* We're a descendant of szp */ 3756be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3757fa9e4066Sahrens 37580a586ceaSMark Shellenbaum if (oidp == rootid) /* We've hit the top */ 3759fa9e4066Sahrens return (0); 3760fa9e4066Sahrens 3761fa9e4066Sahrens if (rw == RW_READER) { /* i.e. not the first pass */ 37620a586ceaSMark Shellenbaum int error = zfs_zget(zp->z_zfsvfs, oidp, &zp); 3763fa9e4066Sahrens if (error) 3764fa9e4066Sahrens return (error); 3765fa9e4066Sahrens zl->zl_znode = zp; 3766fa9e4066Sahrens } 37670a586ceaSMark Shellenbaum (void) sa_lookup(zp->z_sa_hdl, SA_ZPL_PARENT(zp->z_zfsvfs), 37680a586ceaSMark Shellenbaum &oidp, sizeof (oidp)); 3769fa9e4066Sahrens rwlp = &zp->z_parent_lock; 3770fa9e4066Sahrens rw = RW_READER; 3771fa9e4066Sahrens 3772fa9e4066Sahrens } while (zp->z_id != sdzp->z_id); 3773fa9e4066Sahrens 3774fa9e4066Sahrens return (0); 3775fa9e4066Sahrens } 3776fa9e4066Sahrens 3777fa9e4066Sahrens /* 3778fa9e4066Sahrens * Move an entry from the provided source directory to the target 3779fa9e4066Sahrens * directory. Change the entry name as indicated. 3780fa9e4066Sahrens * 3781fa9e4066Sahrens * IN: sdvp - Source directory containing the "old entry". 3782fa9e4066Sahrens * snm - Old entry name. 3783fa9e4066Sahrens * tdvp - Target directory to contain the "new entry". 3784fa9e4066Sahrens * tnm - New entry name. 3785fa9e4066Sahrens * cr - credentials of caller. 3786da6c28aaSamw * ct - caller context 3787da6c28aaSamw * flags - case flags 3788fa9e4066Sahrens * 3789f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 3790fa9e4066Sahrens * 3791fa9e4066Sahrens * Timestamps: 3792fa9e4066Sahrens * sdvp,tdvp - ctime|mtime updated 3793fa9e4066Sahrens */ 3794da6c28aaSamw /*ARGSUSED*/ 3795fa9e4066Sahrens static int 3796da6c28aaSamw zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr, 3797da6c28aaSamw caller_context_t *ct, int flags) 3798fa9e4066Sahrens { 3799fa9e4066Sahrens znode_t *tdzp, *szp, *tzp; 3800fa9e4066Sahrens znode_t *sdzp = VTOZ(sdvp); 3801fa9e4066Sahrens zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 3802f18faf3fSek zilog_t *zilog; 3803fa9e4066Sahrens vnode_t *realvp; 3804fa9e4066Sahrens zfs_dirlock_t *sdl, *tdl; 3805fa9e4066Sahrens dmu_tx_t *tx; 3806fa9e4066Sahrens zfs_zlock_t *zl; 3807da6c28aaSamw int cmp, serr, terr; 380854207fd2SJerry Jelinek int error = 0, rm_err = 0; 3809da6c28aaSamw int zflg = 0; 381069962b56SMatthew Ahrens boolean_t waited = B_FALSE; 3811fa9e4066Sahrens 38123cb34c60Sahrens ZFS_ENTER(zfsvfs); 38133cb34c60Sahrens ZFS_VERIFY_ZP(sdzp); 3814f18faf3fSek zilog = zfsvfs->z_log; 3815fa9e4066Sahrens 3816fa9e4066Sahrens /* 3817fa9e4066Sahrens * Make sure we have the real vp for the target directory. 3818fa9e4066Sahrens */ 3819da6c28aaSamw if (VOP_REALVP(tdvp, &realvp, ct) == 0) 3820fa9e4066Sahrens tdvp = realvp; 3821fa9e4066Sahrens 382218e64978SMarcel Telka tdzp = VTOZ(tdvp); 382318e64978SMarcel Telka ZFS_VERIFY_ZP(tdzp); 382418e64978SMarcel Telka 382518e64978SMarcel Telka /* 382618e64978SMarcel Telka * We check z_zfsvfs rather than v_vfsp here, because snapshots and the 382718e64978SMarcel Telka * ctldir appear to have the same v_vfsp. 382818e64978SMarcel Telka */ 382918e64978SMarcel Telka if (tdzp->z_zfsvfs != zfsvfs || zfsctl_is_node(tdvp)) { 3830fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3831be6fd75aSMatthew Ahrens return (SET_ERROR(EXDEV)); 3832fa9e4066Sahrens } 3833fa9e4066Sahrens 3834de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(tnm, 3835da6c28aaSamw strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3836da6c28aaSamw ZFS_EXIT(zfsvfs); 3837be6fd75aSMatthew Ahrens return (SET_ERROR(EILSEQ)); 3838da6c28aaSamw } 3839da6c28aaSamw 3840da6c28aaSamw if (flags & FIGNORECASE) 3841da6c28aaSamw zflg |= ZCILOOK; 3842da6c28aaSamw 3843fa9e4066Sahrens top: 3844fa9e4066Sahrens szp = NULL; 3845fa9e4066Sahrens tzp = NULL; 3846fa9e4066Sahrens zl = NULL; 3847fa9e4066Sahrens 3848fa9e4066Sahrens /* 3849fa9e4066Sahrens * This is to prevent the creation of links into attribute space 3850fa9e4066Sahrens * by renaming a linked file into/outof an attribute directory. 3851fa9e4066Sahrens * See the comment in zfs_link() for why this is considered bad. 3852fa9e4066Sahrens */ 38530a586ceaSMark Shellenbaum if ((tdzp->z_pflags & ZFS_XATTR) != (sdzp->z_pflags & ZFS_XATTR)) { 3854fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3855be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 3856fa9e4066Sahrens } 3857fa9e4066Sahrens 3858fa9e4066Sahrens /* 3859fa9e4066Sahrens * Lock source and target directory entries. To prevent deadlock, 3860fa9e4066Sahrens * a lock ordering must be defined. We lock the directory with 3861fa9e4066Sahrens * the smallest object id first, or if it's a tie, the one with 3862fa9e4066Sahrens * the lexically first name. 3863fa9e4066Sahrens */ 3864fa9e4066Sahrens if (sdzp->z_id < tdzp->z_id) { 3865fa9e4066Sahrens cmp = -1; 3866fa9e4066Sahrens } else if (sdzp->z_id > tdzp->z_id) { 3867fa9e4066Sahrens cmp = 1; 3868fa9e4066Sahrens } else { 3869da6c28aaSamw /* 3870da6c28aaSamw * First compare the two name arguments without 3871da6c28aaSamw * considering any case folding. 3872da6c28aaSamw */ 3873da6c28aaSamw int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER); 3874da6c28aaSamw 3875da6c28aaSamw cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error); 3876de8267e0Stimh ASSERT(error == 0 || !zfsvfs->z_utf8); 3877fa9e4066Sahrens if (cmp == 0) { 3878fa9e4066Sahrens /* 3879fa9e4066Sahrens * POSIX: "If the old argument and the new argument 3880fa9e4066Sahrens * both refer to links to the same existing file, 3881fa9e4066Sahrens * the rename() function shall return successfully 3882fa9e4066Sahrens * and perform no other action." 3883fa9e4066Sahrens */ 3884fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3885fa9e4066Sahrens return (0); 3886fa9e4066Sahrens } 3887da6c28aaSamw /* 3888da6c28aaSamw * If the file system is case-folding, then we may 3889da6c28aaSamw * have some more checking to do. A case-folding file 3890da6c28aaSamw * system is either supporting mixed case sensitivity 3891da6c28aaSamw * access or is completely case-insensitive. Note 3892da6c28aaSamw * that the file system is always case preserving. 3893da6c28aaSamw * 3894da6c28aaSamw * In mixed sensitivity mode case sensitive behavior 3895da6c28aaSamw * is the default. FIGNORECASE must be used to 3896da6c28aaSamw * explicitly request case insensitive behavior. 3897da6c28aaSamw * 3898da6c28aaSamw * If the source and target names provided differ only 3899da6c28aaSamw * by case (e.g., a request to rename 'tim' to 'Tim'), 3900da6c28aaSamw * we will treat this as a special case in the 3901da6c28aaSamw * case-insensitive mode: as long as the source name 3902da6c28aaSamw * is an exact match, we will allow this to proceed as 3903da6c28aaSamw * a name-change request. 3904da6c28aaSamw */ 3905de8267e0Stimh if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 3906de8267e0Stimh (zfsvfs->z_case == ZFS_CASE_MIXED && 3907de8267e0Stimh flags & FIGNORECASE)) && 3908da6c28aaSamw u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST, 3909da6c28aaSamw &error) == 0) { 3910da6c28aaSamw /* 3911da6c28aaSamw * case preserving rename request, require exact 3912da6c28aaSamw * name matches 3913da6c28aaSamw */ 3914da6c28aaSamw zflg |= ZCIEXACT; 3915da6c28aaSamw zflg &= ~ZCILOOK; 3916da6c28aaSamw } 3917fa9e4066Sahrens } 3918da6c28aaSamw 3919afefc7e4SSanjeev Bagewadi /* 3920afefc7e4SSanjeev Bagewadi * If the source and destination directories are the same, we should 3921afefc7e4SSanjeev Bagewadi * grab the z_name_lock of that directory only once. 3922afefc7e4SSanjeev Bagewadi */ 3923afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) { 3924afefc7e4SSanjeev Bagewadi zflg |= ZHAVELOCK; 3925afefc7e4SSanjeev Bagewadi rw_enter(&sdzp->z_name_lock, RW_READER); 3926afefc7e4SSanjeev Bagewadi } 3927afefc7e4SSanjeev Bagewadi 3928fa9e4066Sahrens if (cmp < 0) { 3929da6c28aaSamw serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, 3930da6c28aaSamw ZEXISTS | zflg, NULL, NULL); 3931da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3932da6c28aaSamw tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL); 3933fa9e4066Sahrens } else { 3934da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3935da6c28aaSamw tdzp, tnm, &tzp, zflg, NULL, NULL); 3936da6c28aaSamw serr = zfs_dirent_lock(&sdl, 3937da6c28aaSamw sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg, 3938da6c28aaSamw NULL, NULL); 3939fa9e4066Sahrens } 3940fa9e4066Sahrens 3941fa9e4066Sahrens if (serr) { 3942fa9e4066Sahrens /* 3943fa9e4066Sahrens * Source entry invalid or not there. 3944fa9e4066Sahrens */ 3945fa9e4066Sahrens if (!terr) { 3946fa9e4066Sahrens zfs_dirent_unlock(tdl); 3947fa9e4066Sahrens if (tzp) 3948fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3949fa9e4066Sahrens } 3950afefc7e4SSanjeev Bagewadi 3951afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) 3952afefc7e4SSanjeev Bagewadi rw_exit(&sdzp->z_name_lock); 3953afefc7e4SSanjeev Bagewadi 3954fa9e4066Sahrens if (strcmp(snm, "..") == 0) 3955be6fd75aSMatthew Ahrens serr = SET_ERROR(EINVAL); 3956fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3957fa9e4066Sahrens return (serr); 3958fa9e4066Sahrens } 3959fa9e4066Sahrens if (terr) { 3960fa9e4066Sahrens zfs_dirent_unlock(sdl); 3961fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3962afefc7e4SSanjeev Bagewadi 3963afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) 3964afefc7e4SSanjeev Bagewadi rw_exit(&sdzp->z_name_lock); 3965afefc7e4SSanjeev Bagewadi 3966fa9e4066Sahrens if (strcmp(tnm, "..") == 0) 3967be6fd75aSMatthew Ahrens terr = SET_ERROR(EINVAL); 3968fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3969fa9e4066Sahrens return (terr); 3970fa9e4066Sahrens } 3971fa9e4066Sahrens 3972f67950b2SNasf-Fan /* 3973f67950b2SNasf-Fan * If we are using project inheritance, it means if the directory has 3974f67950b2SNasf-Fan * ZFS_PROJINHERIT set, then its descendant directories will inherit 3975f67950b2SNasf-Fan * not only the project ID, but also the ZFS_PROJINHERIT flag. Under 3976f67950b2SNasf-Fan * such case, we only allow renames into our tree when the project 3977f67950b2SNasf-Fan * IDs are the same. 3978f67950b2SNasf-Fan */ 3979f67950b2SNasf-Fan if (tdzp->z_pflags & ZFS_PROJINHERIT && 3980f67950b2SNasf-Fan tdzp->z_projid != szp->z_projid) { 3981f67950b2SNasf-Fan error = SET_ERROR(EXDEV); 3982f67950b2SNasf-Fan goto out; 3983f67950b2SNasf-Fan } 3984f67950b2SNasf-Fan 3985fa9e4066Sahrens /* 3986fa9e4066Sahrens * Must have write access at the source to remove the old entry 3987fa9e4066Sahrens * and write access at the target to create the new entry. 3988fa9e4066Sahrens * Note that if target and source are the same, this can be 3989fa9e4066Sahrens * done in a single check. 3990fa9e4066Sahrens */ 3991fa9e4066Sahrens 3992fa9e4066Sahrens if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 3993fa9e4066Sahrens goto out; 3994fa9e4066Sahrens 3995fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3996fa9e4066Sahrens /* 3997fa9e4066Sahrens * Check to make sure rename is valid. 3998fa9e4066Sahrens * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 3999fa9e4066Sahrens */ 4000fa9e4066Sahrens if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 4001fa9e4066Sahrens goto out; 4002fa9e4066Sahrens } 4003fa9e4066Sahrens 4004fa9e4066Sahrens /* 4005fa9e4066Sahrens * Does target exist? 4006fa9e4066Sahrens */ 4007fa9e4066Sahrens if (tzp) { 4008fa9e4066Sahrens /* 4009fa9e4066Sahrens * Source and target must be the same type. 4010fa9e4066Sahrens */ 4011fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 4012fa9e4066Sahrens if (ZTOV(tzp)->v_type != VDIR) { 4013be6fd75aSMatthew Ahrens error = SET_ERROR(ENOTDIR); 4014fa9e4066Sahrens goto out; 4015fa9e4066Sahrens } 4016fa9e4066Sahrens } else { 4017fa9e4066Sahrens if (ZTOV(tzp)->v_type == VDIR) { 4018be6fd75aSMatthew Ahrens error = SET_ERROR(EISDIR); 4019fa9e4066Sahrens goto out; 4020fa9e4066Sahrens } 4021fa9e4066Sahrens } 4022fa9e4066Sahrens /* 4023fa9e4066Sahrens * POSIX dictates that when the source and target 4024fa9e4066Sahrens * entries refer to the same file object, rename 4025fa9e4066Sahrens * must do nothing and exit without error. 4026fa9e4066Sahrens */ 4027fa9e4066Sahrens if (szp->z_id == tzp->z_id) { 4028fa9e4066Sahrens error = 0; 4029fa9e4066Sahrens goto out; 4030fa9e4066Sahrens } 4031fa9e4066Sahrens } 4032fa9e4066Sahrens 403354207fd2SJerry Jelinek vnevent_pre_rename_src(ZTOV(szp), sdvp, snm, ct); 4034fa9e4066Sahrens if (tzp) 403554207fd2SJerry Jelinek vnevent_pre_rename_dest(ZTOV(tzp), tdvp, tnm, ct); 4036df2381bfSpraks 4037df2381bfSpraks /* 4038df2381bfSpraks * notify the target directory if it is not the same 4039df2381bfSpraks * as source directory. 4040df2381bfSpraks */ 4041df2381bfSpraks if (tdvp != sdvp) { 404254207fd2SJerry Jelinek vnevent_pre_rename_dest_dir(tdvp, ZTOV(szp), tnm, ct); 4043df2381bfSpraks } 4044fa9e4066Sahrens 4045fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 40460a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE); 40470a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, sdzp->z_sa_hdl, B_FALSE); 4048ea8dc4b6Seschrock dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); 4049ea8dc4b6Seschrock dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); 40500a586ceaSMark Shellenbaum if (sdzp != tdzp) { 40510a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, tdzp->z_sa_hdl, B_FALSE); 40520a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, tdzp); 40530a586ceaSMark Shellenbaum } 40540a586ceaSMark Shellenbaum if (tzp) { 40550a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, tzp->z_sa_hdl, B_FALSE); 40560a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, tzp); 40570a586ceaSMark Shellenbaum } 40580a586ceaSMark Shellenbaum 40590a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, szp); 4060893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 4061f864f99eSPrakash Surya error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); 4062fa9e4066Sahrens if (error) { 4063fa9e4066Sahrens if (zl != NULL) 4064fa9e4066Sahrens zfs_rename_unlock(&zl); 4065fa9e4066Sahrens zfs_dirent_unlock(sdl); 4066fa9e4066Sahrens zfs_dirent_unlock(tdl); 4067afefc7e4SSanjeev Bagewadi 4068afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) 4069afefc7e4SSanjeev Bagewadi rw_exit(&sdzp->z_name_lock); 4070afefc7e4SSanjeev Bagewadi 4071fa9e4066Sahrens VN_RELE(ZTOV(szp)); 4072fa9e4066Sahrens if (tzp) 4073fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 40741209a471SNeil Perrin if (error == ERESTART) { 407569962b56SMatthew Ahrens waited = B_TRUE; 40768a2f1b91Sahrens dmu_tx_wait(tx); 40778a2f1b91Sahrens dmu_tx_abort(tx); 4078fa9e4066Sahrens goto top; 4079fa9e4066Sahrens } 40808a2f1b91Sahrens dmu_tx_abort(tx); 4081fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4082fa9e4066Sahrens return (error); 4083fa9e4066Sahrens } 4084fa9e4066Sahrens 4085fa9e4066Sahrens if (tzp) /* Attempt to remove the existing target */ 408654207fd2SJerry Jelinek error = rm_err = zfs_link_destroy(tdl, tzp, tx, zflg, NULL); 4087fa9e4066Sahrens 4088fa9e4066Sahrens if (error == 0) { 4089fa9e4066Sahrens error = zfs_link_create(tdl, szp, tx, ZRENAMING); 4090fa9e4066Sahrens if (error == 0) { 40910a586ceaSMark Shellenbaum szp->z_pflags |= ZFS_AV_MODIFIED; 4092f67950b2SNasf-Fan if (tdzp->z_pflags & ZFS_PROJINHERIT) 4093f67950b2SNasf-Fan szp->z_pflags |= ZFS_PROJINHERIT; 40940a586ceaSMark Shellenbaum 40950a586ceaSMark Shellenbaum error = sa_update(szp->z_sa_hdl, SA_ZPL_FLAGS(zfsvfs), 40960a586ceaSMark Shellenbaum (void *)&szp->z_pflags, sizeof (uint64_t), tx); 4097fb09f5aaSMadhav Suresh ASSERT0(error); 4098da6c28aaSamw 4099fa9e4066Sahrens error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 41006ed5e6abSSam Falkner if (error == 0) { 41016ed5e6abSSam Falkner zfs_log_rename(zilog, tx, TX_RENAME | 410291de656bSNeil Perrin (flags & FIGNORECASE ? TX_CI : 0), sdzp, 410391de656bSNeil Perrin sdl->dl_name, tdzp, tdl->dl_name, szp); 410451ece835Seschrock 41056ed5e6abSSam Falkner /* 41066ed5e6abSSam Falkner * Update path information for the target vnode 41076ed5e6abSSam Falkner */ 41086ed5e6abSSam Falkner vn_renamepath(tdvp, ZTOV(szp), tnm, 41096ed5e6abSSam Falkner strlen(tnm)); 41106ed5e6abSSam Falkner } else { 41116ed5e6abSSam Falkner /* 41126ed5e6abSSam Falkner * At this point, we have successfully created 41136ed5e6abSSam Falkner * the target name, but have failed to remove 41146ed5e6abSSam Falkner * the source name. Since the create was done 41156ed5e6abSSam Falkner * with the ZRENAMING flag, there are 41166ed5e6abSSam Falkner * complications; for one, the link count is 41176ed5e6abSSam Falkner * wrong. The easiest way to deal with this 41186ed5e6abSSam Falkner * is to remove the newly created target, and 41196ed5e6abSSam Falkner * return the original error. This must 41206ed5e6abSSam Falkner * succeed; fortunately, it is very unlikely to 41216ed5e6abSSam Falkner * fail, since we just created it. 41226ed5e6abSSam Falkner */ 41236ed5e6abSSam Falkner VERIFY3U(zfs_link_destroy(tdl, szp, tx, 41246ed5e6abSSam Falkner ZRENAMING, NULL), ==, 0); 41256ed5e6abSSam Falkner } 4126fa9e4066Sahrens } 4127fa9e4066Sahrens } 4128fa9e4066Sahrens 4129fa9e4066Sahrens dmu_tx_commit(tx); 413054207fd2SJerry Jelinek 413154207fd2SJerry Jelinek if (tzp && rm_err == 0) 413254207fd2SJerry Jelinek vnevent_rename_dest(ZTOV(tzp), tdvp, tnm, ct); 413354207fd2SJerry Jelinek 413454207fd2SJerry Jelinek if (error == 0) { 413554207fd2SJerry Jelinek vnevent_rename_src(ZTOV(szp), sdvp, snm, ct); 413654207fd2SJerry Jelinek /* notify the target dir if it is not the same as source dir */ 413754207fd2SJerry Jelinek if (tdvp != sdvp) 413854207fd2SJerry Jelinek vnevent_rename_dest_dir(tdvp, ct); 413954207fd2SJerry Jelinek } 4140fa9e4066Sahrens out: 4141fa9e4066Sahrens if (zl != NULL) 4142fa9e4066Sahrens zfs_rename_unlock(&zl); 4143fa9e4066Sahrens 4144fa9e4066Sahrens zfs_dirent_unlock(sdl); 4145fa9e4066Sahrens zfs_dirent_unlock(tdl); 4146fa9e4066Sahrens 4147afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) 4148afefc7e4SSanjeev Bagewadi rw_exit(&sdzp->z_name_lock); 4149afefc7e4SSanjeev Bagewadi 4150afefc7e4SSanjeev Bagewadi 4151fa9e4066Sahrens VN_RELE(ZTOV(szp)); 4152fa9e4066Sahrens if (tzp) 4153fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 4154fa9e4066Sahrens 415555da60b9SMark J Musante if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 41565002558fSNeil Perrin zil_commit(zilog, 0); 415755da60b9SMark J Musante 4158fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4159fa9e4066Sahrens return (error); 4160fa9e4066Sahrens } 4161fa9e4066Sahrens 4162fa9e4066Sahrens /* 4163fa9e4066Sahrens * Insert the indicated symbolic reference entry into the directory. 4164fa9e4066Sahrens * 4165fa9e4066Sahrens * IN: dvp - Directory to contain new symbolic link. 4166fa9e4066Sahrens * link - Name for new symlink entry. 4167fa9e4066Sahrens * vap - Attributes of new entry. 4168fa9e4066Sahrens * cr - credentials of caller. 4169da6c28aaSamw * ct - caller context 4170da6c28aaSamw * flags - case flags 4171fa9e4066Sahrens * 4172f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 4173fa9e4066Sahrens * 4174fa9e4066Sahrens * Timestamps: 4175fa9e4066Sahrens * dvp - ctime|mtime updated 4176fa9e4066Sahrens */ 4177da6c28aaSamw /*ARGSUSED*/ 4178fa9e4066Sahrens static int 4179da6c28aaSamw zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr, 4180da6c28aaSamw caller_context_t *ct, int flags) 4181fa9e4066Sahrens { 4182fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 4183fa9e4066Sahrens zfs_dirlock_t *dl; 4184fa9e4066Sahrens dmu_tx_t *tx; 4185fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 4186f18faf3fSek zilog_t *zilog; 41870a586ceaSMark Shellenbaum uint64_t len = strlen(link); 4188fa9e4066Sahrens int error; 4189da6c28aaSamw int zflg = ZNEW; 419089459e17SMark Shellenbaum zfs_acl_ids_t acl_ids; 419189459e17SMark Shellenbaum boolean_t fuid_dirtied; 41920a586ceaSMark Shellenbaum uint64_t txtype = TX_SYMLINK; 419369962b56SMatthew Ahrens boolean_t waited = B_FALSE; 4194fa9e4066Sahrens 4195fa9e4066Sahrens ASSERT(vap->va_type == VLNK); 4196fa9e4066Sahrens 41973cb34c60Sahrens ZFS_ENTER(zfsvfs); 41983cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 4199f18faf3fSek zilog = zfsvfs->z_log; 4200da6c28aaSamw 4201de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 4202da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 4203da6c28aaSamw ZFS_EXIT(zfsvfs); 4204be6fd75aSMatthew Ahrens return (SET_ERROR(EILSEQ)); 4205da6c28aaSamw } 4206da6c28aaSamw if (flags & FIGNORECASE) 4207da6c28aaSamw zflg |= ZCILOOK; 4208fa9e4066Sahrens 4209fa9e4066Sahrens if (len > MAXPATHLEN) { 4210fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4211be6fd75aSMatthew Ahrens return (SET_ERROR(ENAMETOOLONG)); 4212fa9e4066Sahrens } 4213fa9e4066Sahrens 4214c8c24165SMark Shellenbaum if ((error = zfs_acl_ids_create(dzp, 0, 4215c8c24165SMark Shellenbaum vap, cr, NULL, &acl_ids)) != 0) { 4216c8c24165SMark Shellenbaum ZFS_EXIT(zfsvfs); 4217c8c24165SMark Shellenbaum return (error); 4218c8c24165SMark Shellenbaum } 4219c8c24165SMark Shellenbaum top: 4220fa9e4066Sahrens /* 4221fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 4222fa9e4066Sahrens */ 4223da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL); 4224da6c28aaSamw if (error) { 4225c8c24165SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 4226c8c24165SMark Shellenbaum ZFS_EXIT(zfsvfs); 4227c8c24165SMark Shellenbaum return (error); 4228c8c24165SMark Shellenbaum } 4229c8c24165SMark Shellenbaum 4230c8c24165SMark Shellenbaum if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 4231c8c24165SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 42328e303ae0SMark Shellenbaum zfs_dirent_unlock(dl); 4233fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4234fa9e4066Sahrens return (error); 4235fa9e4066Sahrens } 4236fa9e4066Sahrens 4237f67950b2SNasf-Fan if (zfs_acl_ids_overquota(zfsvfs, &acl_ids, ZFS_DEFAULT_PROJID)) { 423814843421SMatthew Ahrens zfs_acl_ids_free(&acl_ids); 423914843421SMatthew Ahrens zfs_dirent_unlock(dl); 424014843421SMatthew Ahrens ZFS_EXIT(zfsvfs); 4241be6fd75aSMatthew Ahrens return (SET_ERROR(EDQUOT)); 424214843421SMatthew Ahrens } 4243fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 424489459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 4245fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 4246ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 42470a586ceaSMark Shellenbaum dmu_tx_hold_sa_create(tx, acl_ids.z_aclp->z_acl_bytes + 42480a586ceaSMark Shellenbaum ZFS_SA_BASE_ATTR_SIZE + len); 42490a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, dzp->z_sa_hdl, B_FALSE); 42500a586ceaSMark Shellenbaum if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 42510a586ceaSMark Shellenbaum dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 42520a586ceaSMark Shellenbaum acl_ids.z_aclp->z_acl_bytes); 42530a586ceaSMark Shellenbaum } 425414843421SMatthew Ahrens if (fuid_dirtied) 425514843421SMatthew Ahrens zfs_fuid_txhold(zfsvfs, tx); 4256f864f99eSPrakash Surya error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); 4257fa9e4066Sahrens if (error) { 4258fa9e4066Sahrens zfs_dirent_unlock(dl); 42591209a471SNeil Perrin if (error == ERESTART) { 426069962b56SMatthew Ahrens waited = B_TRUE; 42618a2f1b91Sahrens dmu_tx_wait(tx); 42628a2f1b91Sahrens dmu_tx_abort(tx); 4263fa9e4066Sahrens goto top; 4264fa9e4066Sahrens } 4265c8c24165SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 42668a2f1b91Sahrens dmu_tx_abort(tx); 4267fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4268fa9e4066Sahrens return (error); 4269fa9e4066Sahrens } 4270fa9e4066Sahrens 4271fa9e4066Sahrens /* 4272fa9e4066Sahrens * Create a new object for the symlink. 42730a586ceaSMark Shellenbaum * for version 4 ZPL datsets the symlink will be an SA attribute 4274fa9e4066Sahrens */ 42750a586ceaSMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, &acl_ids); 4276fa9e4066Sahrens 42770a586ceaSMark Shellenbaum if (fuid_dirtied) 42780a586ceaSMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 4279fa9e4066Sahrens 42801412a1a2SMark Shellenbaum mutex_enter(&zp->z_lock); 42810a586ceaSMark Shellenbaum if (zp->z_is_sa) 42820a586ceaSMark Shellenbaum error = sa_update(zp->z_sa_hdl, SA_ZPL_SYMLINK(zfsvfs), 42830a586ceaSMark Shellenbaum link, len, tx); 42840a586ceaSMark Shellenbaum else 42850a586ceaSMark Shellenbaum zfs_sa_symlink(zp, link, len, tx); 42861412a1a2SMark Shellenbaum mutex_exit(&zp->z_lock); 4287fa9e4066Sahrens 42880a586ceaSMark Shellenbaum zp->z_size = len; 42890a586ceaSMark Shellenbaum (void) sa_update(zp->z_sa_hdl, SA_ZPL_SIZE(zfsvfs), 42900a586ceaSMark Shellenbaum &zp->z_size, sizeof (zp->z_size), tx); 4291fa9e4066Sahrens /* 4292fa9e4066Sahrens * Insert the new object into the directory. 4293fa9e4066Sahrens */ 4294fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 42950a586ceaSMark Shellenbaum 42960a586ceaSMark Shellenbaum if (flags & FIGNORECASE) 42970a586ceaSMark Shellenbaum txtype |= TX_CI; 42980a586ceaSMark Shellenbaum zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link); 429989459e17SMark Shellenbaum 430089459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 4301fa9e4066Sahrens 4302fa9e4066Sahrens dmu_tx_commit(tx); 4303fa9e4066Sahrens 4304fa9e4066Sahrens zfs_dirent_unlock(dl); 4305fa9e4066Sahrens 4306fa9e4066Sahrens VN_RELE(ZTOV(zp)); 4307fa9e4066Sahrens 430855da60b9SMark J Musante if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 43095002558fSNeil Perrin zil_commit(zilog, 0); 431055da60b9SMark J Musante 4311fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4312fa9e4066Sahrens return (error); 4313fa9e4066Sahrens } 4314fa9e4066Sahrens 4315fa9e4066Sahrens /* 4316fa9e4066Sahrens * Return, in the buffer contained in the provided uio structure, 4317fa9e4066Sahrens * the symbolic path referred to by vp. 4318fa9e4066Sahrens * 4319fa9e4066Sahrens * IN: vp - vnode of symbolic link. 4320f7170741SWill Andrews * uio - structure to contain the link path. 4321fa9e4066Sahrens * cr - credentials of caller. 4322da6c28aaSamw * ct - caller context 4323fa9e4066Sahrens * 4324f7170741SWill Andrews * OUT: uio - structure containing the link path. 4325fa9e4066Sahrens * 4326f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 4327fa9e4066Sahrens * 4328fa9e4066Sahrens * Timestamps: 4329fa9e4066Sahrens * vp - atime updated 4330fa9e4066Sahrens */ 4331fa9e4066Sahrens /* ARGSUSED */ 4332fa9e4066Sahrens static int 4333da6c28aaSamw zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct) 4334fa9e4066Sahrens { 4335fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4336fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4337fa9e4066Sahrens int error; 4338fa9e4066Sahrens 43393cb34c60Sahrens ZFS_ENTER(zfsvfs); 43403cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4341fa9e4066Sahrens 43421412a1a2SMark Shellenbaum mutex_enter(&zp->z_lock); 43430a586ceaSMark Shellenbaum if (zp->z_is_sa) 43440a586ceaSMark Shellenbaum error = sa_lookup_uio(zp->z_sa_hdl, 43450a586ceaSMark Shellenbaum SA_ZPL_SYMLINK(zfsvfs), uio); 43460a586ceaSMark Shellenbaum else 43470a586ceaSMark Shellenbaum error = zfs_sa_readlink(zp, uio); 43481412a1a2SMark Shellenbaum mutex_exit(&zp->z_lock); 4349fa9e4066Sahrens 4350fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 43510a586ceaSMark Shellenbaum 4352fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4353fa9e4066Sahrens return (error); 4354fa9e4066Sahrens } 4355fa9e4066Sahrens 4356fa9e4066Sahrens /* 4357fa9e4066Sahrens * Insert a new entry into directory tdvp referencing svp. 4358fa9e4066Sahrens * 4359fa9e4066Sahrens * IN: tdvp - Directory to contain new entry. 4360fa9e4066Sahrens * svp - vnode of new entry. 4361fa9e4066Sahrens * name - name of new entry. 4362fa9e4066Sahrens * cr - credentials of caller. 4363da6c28aaSamw * ct - caller context 4364fa9e4066Sahrens * 4365f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 4366fa9e4066Sahrens * 4367fa9e4066Sahrens * Timestamps: 4368fa9e4066Sahrens * tdvp - ctime|mtime updated 4369fa9e4066Sahrens * svp - ctime updated 4370fa9e4066Sahrens */ 4371fa9e4066Sahrens /* ARGSUSED */ 4372fa9e4066Sahrens static int 4373da6c28aaSamw zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr, 4374da6c28aaSamw caller_context_t *ct, int flags) 4375fa9e4066Sahrens { 4376fa9e4066Sahrens znode_t *dzp = VTOZ(tdvp); 4377fa9e4066Sahrens znode_t *tzp, *szp; 4378fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 4379f18faf3fSek zilog_t *zilog; 4380fa9e4066Sahrens zfs_dirlock_t *dl; 4381fa9e4066Sahrens dmu_tx_t *tx; 4382fa9e4066Sahrens vnode_t *realvp; 4383fa9e4066Sahrens int error; 4384da6c28aaSamw int zf = ZNEW; 4385d39ee142SMark Shellenbaum uint64_t parent; 4386f1696b23SMark Shellenbaum uid_t owner; 438769962b56SMatthew Ahrens boolean_t waited = B_FALSE; 4388fa9e4066Sahrens 4389fa9e4066Sahrens ASSERT(tdvp->v_type == VDIR); 4390fa9e4066Sahrens 43913cb34c60Sahrens ZFS_ENTER(zfsvfs); 43923cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 4393f18faf3fSek zilog = zfsvfs->z_log; 4394fa9e4066Sahrens 4395da6c28aaSamw if (VOP_REALVP(svp, &realvp, ct) == 0) 4396fa9e4066Sahrens svp = realvp; 4397fa9e4066Sahrens 4398d39ee142SMark Shellenbaum /* 4399d39ee142SMark Shellenbaum * POSIX dictates that we return EPERM here. 4400d39ee142SMark Shellenbaum * Better choices include ENOTSUP or EISDIR. 4401d39ee142SMark Shellenbaum */ 4402d39ee142SMark Shellenbaum if (svp->v_type == VDIR) { 4403d39ee142SMark Shellenbaum ZFS_EXIT(zfsvfs); 4404be6fd75aSMatthew Ahrens return (SET_ERROR(EPERM)); 4405d39ee142SMark Shellenbaum } 4406d39ee142SMark Shellenbaum 440718e64978SMarcel Telka szp = VTOZ(svp); 440818e64978SMarcel Telka ZFS_VERIFY_ZP(szp); 440918e64978SMarcel Telka 4410f67950b2SNasf-Fan /* 4411f67950b2SNasf-Fan * If we are using project inheritance, it means if the directory has 4412f67950b2SNasf-Fan * ZFS_PROJINHERIT set, then its descendant directories will inherit 4413f67950b2SNasf-Fan * not only the project ID, but also the ZFS_PROJINHERIT flag. Under 4414f67950b2SNasf-Fan * such case, we only allow hard link creation in our tree when the 4415f67950b2SNasf-Fan * project IDs are the same. 4416f67950b2SNasf-Fan */ 4417f67950b2SNasf-Fan if (dzp->z_pflags & ZFS_PROJINHERIT && dzp->z_projid != szp->z_projid) { 4418f67950b2SNasf-Fan ZFS_EXIT(zfsvfs); 4419f67950b2SNasf-Fan return (SET_ERROR(EXDEV)); 4420f67950b2SNasf-Fan } 4421f67950b2SNasf-Fan 442218e64978SMarcel Telka /* 442318e64978SMarcel Telka * We check z_zfsvfs rather than v_vfsp here, because snapshots and the 442418e64978SMarcel Telka * ctldir appear to have the same v_vfsp. 442518e64978SMarcel Telka */ 442618e64978SMarcel Telka if (szp->z_zfsvfs != zfsvfs || zfsctl_is_node(svp)) { 4427fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4428be6fd75aSMatthew Ahrens return (SET_ERROR(EXDEV)); 4429fa9e4066Sahrens } 4430d39ee142SMark Shellenbaum 4431d39ee142SMark Shellenbaum /* Prevent links to .zfs/shares files */ 4432d39ee142SMark Shellenbaum 4433d39ee142SMark Shellenbaum if ((error = sa_lookup(szp->z_sa_hdl, SA_ZPL_PARENT(zfsvfs), 4434d39ee142SMark Shellenbaum &parent, sizeof (uint64_t))) != 0) { 4435d39ee142SMark Shellenbaum ZFS_EXIT(zfsvfs); 4436d39ee142SMark Shellenbaum return (error); 4437d39ee142SMark Shellenbaum } 4438d39ee142SMark Shellenbaum if (parent == zfsvfs->z_shares_dir) { 4439d39ee142SMark Shellenbaum ZFS_EXIT(zfsvfs); 4440be6fd75aSMatthew Ahrens return (SET_ERROR(EPERM)); 4441d39ee142SMark Shellenbaum } 4442d39ee142SMark Shellenbaum 4443de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, 4444da6c28aaSamw strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 4445da6c28aaSamw ZFS_EXIT(zfsvfs); 4446be6fd75aSMatthew Ahrens return (SET_ERROR(EILSEQ)); 4447da6c28aaSamw } 4448da6c28aaSamw if (flags & FIGNORECASE) 4449da6c28aaSamw zf |= ZCILOOK; 4450da6c28aaSamw 4451fa9e4066Sahrens /* 4452fa9e4066Sahrens * We do not support links between attributes and non-attributes 4453fa9e4066Sahrens * because of the potential security risk of creating links 4454fa9e4066Sahrens * into "normal" file space in order to circumvent restrictions 4455fa9e4066Sahrens * imposed in attribute space. 4456fa9e4066Sahrens */ 44570a586ceaSMark Shellenbaum if ((szp->z_pflags & ZFS_XATTR) != (dzp->z_pflags & ZFS_XATTR)) { 4458fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4459be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 4460fa9e4066Sahrens } 4461fa9e4066Sahrens 4462fa9e4066Sahrens 4463f1696b23SMark Shellenbaum owner = zfs_fuid_map_id(zfsvfs, szp->z_uid, cr, ZFS_OWNER); 4464f1696b23SMark Shellenbaum if (owner != crgetuid(cr) && secpolicy_basic_link(cr) != 0) { 4465fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4466be6fd75aSMatthew Ahrens return (SET_ERROR(EPERM)); 4467fa9e4066Sahrens } 4468fa9e4066Sahrens 4469da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 4470fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4471fa9e4066Sahrens return (error); 4472fa9e4066Sahrens } 4473fa9e4066Sahrens 4474d39ee142SMark Shellenbaum top: 4475fa9e4066Sahrens /* 4476fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 4477fa9e4066Sahrens */ 4478da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &tzp, zf, NULL, NULL); 4479da6c28aaSamw if (error) { 4480fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4481fa9e4066Sahrens return (error); 4482fa9e4066Sahrens } 4483fa9e4066Sahrens 4484fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 44850a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, szp->z_sa_hdl, B_FALSE); 4486ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 44870a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, szp); 44880a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, dzp); 4489f864f99eSPrakash Surya error = dmu_tx_assign(tx, (waited ? TXG_NOTHROTTLE : 0) | TXG_NOWAIT); 4490fa9e4066Sahrens if (error) { 4491fa9e4066Sahrens zfs_dirent_unlock(dl); 44921209a471SNeil Perrin if (error == ERESTART) { 449369962b56SMatthew Ahrens waited = B_TRUE; 44948a2f1b91Sahrens dmu_tx_wait(tx); 44958a2f1b91Sahrens dmu_tx_abort(tx); 4496fa9e4066Sahrens goto top; 4497fa9e4066Sahrens } 44988a2f1b91Sahrens dmu_tx_abort(tx); 4499fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4500fa9e4066Sahrens return (error); 4501fa9e4066Sahrens } 4502fa9e4066Sahrens 4503fa9e4066Sahrens error = zfs_link_create(dl, szp, tx, 0); 4504fa9e4066Sahrens 4505da6c28aaSamw if (error == 0) { 4506da6c28aaSamw uint64_t txtype = TX_LINK; 4507da6c28aaSamw if (flags & FIGNORECASE) 4508da6c28aaSamw txtype |= TX_CI; 4509da6c28aaSamw zfs_log_link(zilog, tx, txtype, dzp, szp, name); 4510da6c28aaSamw } 4511fa9e4066Sahrens 4512fa9e4066Sahrens dmu_tx_commit(tx); 4513fa9e4066Sahrens 4514fa9e4066Sahrens zfs_dirent_unlock(dl); 4515fa9e4066Sahrens 4516df2381bfSpraks if (error == 0) { 4517da6c28aaSamw vnevent_link(svp, ct); 4518df2381bfSpraks } 4519df2381bfSpraks 452055da60b9SMark J Musante if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 45215002558fSNeil Perrin zil_commit(zilog, 0); 452255da60b9SMark J Musante 4523fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4524fa9e4066Sahrens return (error); 4525fa9e4066Sahrens } 4526fa9e4066Sahrens 4527fa9e4066Sahrens /* 4528fa9e4066Sahrens * zfs_null_putapage() is used when the file system has been force 4529fa9e4066Sahrens * unmounted. It just drops the pages. 4530fa9e4066Sahrens */ 4531fa9e4066Sahrens /* ARGSUSED */ 4532fa9e4066Sahrens static int 4533fa9e4066Sahrens zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 45349a686fbcSPaul Dagnelie size_t *lenp, int flags, cred_t *cr) 4535fa9e4066Sahrens { 4536fa9e4066Sahrens pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 4537fa9e4066Sahrens return (0); 4538fa9e4066Sahrens } 4539fa9e4066Sahrens 454044eda4d7Smaybee /* 454144eda4d7Smaybee * Push a page out to disk, klustering if possible. 454244eda4d7Smaybee * 454344eda4d7Smaybee * IN: vp - file to push page to. 454444eda4d7Smaybee * pp - page to push. 454544eda4d7Smaybee * flags - additional flags. 454644eda4d7Smaybee * cr - credentials of caller. 454744eda4d7Smaybee * 454844eda4d7Smaybee * OUT: offp - start of range pushed. 454944eda4d7Smaybee * lenp - len of range pushed. 455044eda4d7Smaybee * 4551f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 455244eda4d7Smaybee * 455344eda4d7Smaybee * NOTE: callers must have locked the page to be pushed. On 455444eda4d7Smaybee * exit, the page (and all other pages in the kluster) must be 455544eda4d7Smaybee * unlocked. 455644eda4d7Smaybee */ 4557fa9e4066Sahrens /* ARGSUSED */ 4558fa9e4066Sahrens static int 4559fa9e4066Sahrens zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 45609a686fbcSPaul Dagnelie size_t *lenp, int flags, cred_t *cr) 4561fa9e4066Sahrens { 4562fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4563fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4564fa9e4066Sahrens dmu_tx_t *tx; 456544eda4d7Smaybee u_offset_t off, koff; 456644eda4d7Smaybee size_t len, klen; 4567fa9e4066Sahrens int err; 4568fa9e4066Sahrens 4569fa9e4066Sahrens off = pp->p_offset; 457044eda4d7Smaybee len = PAGESIZE; 457144eda4d7Smaybee /* 457244eda4d7Smaybee * If our blocksize is bigger than the page size, try to kluster 45731209a471SNeil Perrin * multiple pages so that we write a full block (thus avoiding 457444eda4d7Smaybee * a read-modify-write). 457544eda4d7Smaybee */ 45760a586ceaSMark Shellenbaum if (off < zp->z_size && zp->z_blksz > PAGESIZE) { 4577ac05c741SMark Maybee klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 4578ac05c741SMark Maybee koff = ISP2(klen) ? P2ALIGN(off, (u_offset_t)klen) : 0; 45790a586ceaSMark Shellenbaum ASSERT(koff <= zp->z_size); 45800a586ceaSMark Shellenbaum if (koff + klen > zp->z_size) 45810a586ceaSMark Shellenbaum klen = P2ROUNDUP(zp->z_size - koff, (uint64_t)PAGESIZE); 458244eda4d7Smaybee pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); 458344eda4d7Smaybee } 458444eda4d7Smaybee ASSERT3U(btop(len), ==, btopr(len)); 4585ac05c741SMark Maybee 4586dd6ef538Smaybee /* 4587dd6ef538Smaybee * Can't push pages past end-of-file. 4588dd6ef538Smaybee */ 45890a586ceaSMark Shellenbaum if (off >= zp->z_size) { 4590f4d2e9e6Smaybee /* ignore all pages */ 459144eda4d7Smaybee err = 0; 459244eda4d7Smaybee goto out; 45930a586ceaSMark Shellenbaum } else if (off + len > zp->z_size) { 45940a586ceaSMark Shellenbaum int npages = btopr(zp->z_size - off); 459544eda4d7Smaybee page_t *trunc; 459644eda4d7Smaybee 459744eda4d7Smaybee page_list_break(&pp, &trunc, npages); 4598f4d2e9e6Smaybee /* ignore pages past end of file */ 459944eda4d7Smaybee if (trunc) 4600f4d2e9e6Smaybee pvn_write_done(trunc, flags); 46010a586ceaSMark Shellenbaum len = zp->z_size - off; 4602dd6ef538Smaybee } 460314843421SMatthew Ahrens 4604f67950b2SNasf-Fan if (zfs_id_overblockquota(zfsvfs, DMU_USERUSED_OBJECT, zp->z_uid) || 4605f67950b2SNasf-Fan zfs_id_overblockquota(zfsvfs, DMU_GROUPUSED_OBJECT, zp->z_gid)) { 4606be6fd75aSMatthew Ahrens err = SET_ERROR(EDQUOT); 460714843421SMatthew Ahrens goto out; 460814843421SMatthew Ahrens } 4609fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 4610fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, off, len); 46110a586ceaSMark Shellenbaum 46120a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 46130a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, zp); 4614e722410cSMatthew Ahrens err = dmu_tx_assign(tx, TXG_WAIT); 4615fa9e4066Sahrens if (err != 0) { 46168a2f1b91Sahrens dmu_tx_abort(tx); 4617fa9e4066Sahrens goto out; 4618fa9e4066Sahrens } 4619fa9e4066Sahrens 462044eda4d7Smaybee if (zp->z_blksz <= PAGESIZE) { 46210fab61baSJonathan W Adams caddr_t va = zfs_map_page(pp, S_READ); 462244eda4d7Smaybee ASSERT3U(len, <=, PAGESIZE); 462344eda4d7Smaybee dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 46240fab61baSJonathan W Adams zfs_unmap_page(pp, va); 462544eda4d7Smaybee } else { 462644eda4d7Smaybee err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 462744eda4d7Smaybee } 4628fa9e4066Sahrens 462944eda4d7Smaybee if (err == 0) { 46300a586ceaSMark Shellenbaum uint64_t mtime[2], ctime[2]; 4631db9986c7SMark Shellenbaum sa_bulk_attr_t bulk[3]; 46320a586ceaSMark Shellenbaum int count = 0; 46330a586ceaSMark Shellenbaum 46340a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MTIME(zfsvfs), NULL, 46350a586ceaSMark Shellenbaum &mtime, 16); 46360a586ceaSMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_CTIME(zfsvfs), NULL, 46370a586ceaSMark Shellenbaum &ctime, 16); 4638db9986c7SMark Shellenbaum SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zfsvfs), NULL, 4639db9986c7SMark Shellenbaum &zp->z_pflags, 8); 46400a586ceaSMark Shellenbaum zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime, 46410a586ceaSMark Shellenbaum B_TRUE); 464280e10fd0SAndriy Gapon err = sa_bulk_update(zp->z_sa_hdl, bulk, count, tx); 464380e10fd0SAndriy Gapon ASSERT0(err); 4644ac05c741SMark Maybee zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, len, 0); 464544eda4d7Smaybee } 464668857716SLin Ling dmu_tx_commit(tx); 4647fa9e4066Sahrens 464844eda4d7Smaybee out: 4649f4d2e9e6Smaybee pvn_write_done(pp, (err ? B_ERROR : 0) | flags); 4650fa9e4066Sahrens if (offp) 4651fa9e4066Sahrens *offp = off; 4652fa9e4066Sahrens if (lenp) 4653fa9e4066Sahrens *lenp = len; 4654fa9e4066Sahrens 4655fa9e4066Sahrens return (err); 4656fa9e4066Sahrens } 4657fa9e4066Sahrens 4658fa9e4066Sahrens /* 4659fa9e4066Sahrens * Copy the portion of the file indicated from pages into the file. 4660fa9e4066Sahrens * The pages are stored in a page list attached to the files vnode. 4661fa9e4066Sahrens * 4662fa9e4066Sahrens * IN: vp - vnode of file to push page data to. 4663fa9e4066Sahrens * off - position in file to put data. 4664fa9e4066Sahrens * len - amount of data to write. 4665fa9e4066Sahrens * flags - flags to control the operation. 4666fa9e4066Sahrens * cr - credentials of caller. 4667da6c28aaSamw * ct - caller context. 4668fa9e4066Sahrens * 4669f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 4670fa9e4066Sahrens * 4671fa9e4066Sahrens * Timestamps: 4672fa9e4066Sahrens * vp - ctime|mtime updated 4673fa9e4066Sahrens */ 4674da6c28aaSamw /*ARGSUSED*/ 4675fa9e4066Sahrens static int 4676da6c28aaSamw zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr, 4677da6c28aaSamw caller_context_t *ct) 4678fa9e4066Sahrens { 4679fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4680fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4681fa9e4066Sahrens page_t *pp; 4682fa9e4066Sahrens size_t io_len; 4683fa9e4066Sahrens u_offset_t io_off; 4684ac05c741SMark Maybee uint_t blksz; 468579315247SMatthew Ahrens locked_range_t *lr; 4686fa9e4066Sahrens int error = 0; 4687fa9e4066Sahrens 46883cb34c60Sahrens ZFS_ENTER(zfsvfs); 46893cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4690fa9e4066Sahrens 4691c4fc6b21SGarrett D'Amore /* 4692c4fc6b21SGarrett D'Amore * There's nothing to do if no data is cached. 4693c4fc6b21SGarrett D'Amore */ 4694c4fc6b21SGarrett D'Amore if (!vn_has_cached_data(vp)) { 4695c4fc6b21SGarrett D'Amore ZFS_EXIT(zfsvfs); 4696c4fc6b21SGarrett D'Amore return (0); 4697c4fc6b21SGarrett D'Amore } 4698c4fc6b21SGarrett D'Amore 4699ac05c741SMark Maybee /* 4700ac05c741SMark Maybee * Align this request to the file block size in case we kluster. 4701ac05c741SMark Maybee * XXX - this can result in pretty aggresive locking, which can 4702ac05c741SMark Maybee * impact simultanious read/write access. One option might be 4703ac05c741SMark Maybee * to break up long requests (len == 0) into block-by-block 4704ac05c741SMark Maybee * operations to get narrower locking. 4705ac05c741SMark Maybee */ 4706ac05c741SMark Maybee blksz = zp->z_blksz; 4707ac05c741SMark Maybee if (ISP2(blksz)) 4708ac05c741SMark Maybee io_off = P2ALIGN_TYPED(off, blksz, u_offset_t); 4709ac05c741SMark Maybee else 4710ac05c741SMark Maybee io_off = 0; 4711ac05c741SMark Maybee if (len > 0 && ISP2(blksz)) 47125a6f5619SMark Maybee io_len = P2ROUNDUP_TYPED(len + (off - io_off), blksz, size_t); 4713ac05c741SMark Maybee else 4714ac05c741SMark Maybee io_len = 0; 4715ac05c741SMark Maybee 4716ac05c741SMark Maybee if (io_len == 0) { 4717fa9e4066Sahrens /* 4718ac05c741SMark Maybee * Search the entire vp list for pages >= io_off. 4719fa9e4066Sahrens */ 472079315247SMatthew Ahrens lr = rangelock_enter(&zp->z_rangelock, 472179315247SMatthew Ahrens io_off, UINT64_MAX, RL_WRITER); 4722ac05c741SMark Maybee error = pvn_vplist_dirty(vp, io_off, zfs_putapage, flags, cr); 4723fe9cf88cSperrin goto out; 4724fa9e4066Sahrens } 472579315247SMatthew Ahrens lr = rangelock_enter(&zp->z_rangelock, io_off, io_len, RL_WRITER); 4726fa9e4066Sahrens 47270a586ceaSMark Shellenbaum if (off > zp->z_size) { 4728fa9e4066Sahrens /* past end of file */ 472979315247SMatthew Ahrens rangelock_exit(lr); 4730fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4731fa9e4066Sahrens return (0); 4732fa9e4066Sahrens } 4733fa9e4066Sahrens 47340a586ceaSMark Shellenbaum len = MIN(io_len, P2ROUNDUP(zp->z_size, PAGESIZE) - io_off); 4735fa9e4066Sahrens 4736ac05c741SMark Maybee for (off = io_off; io_off < off + len; io_off += io_len) { 4737fa9e4066Sahrens if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 4738104e2ed7Sperrin pp = page_lookup(vp, io_off, 4739ecb72030Sperrin (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); 4740fa9e4066Sahrens } else { 4741fa9e4066Sahrens pp = page_lookup_nowait(vp, io_off, 4742ecb72030Sperrin (flags & B_FREE) ? SE_EXCL : SE_SHARED); 4743fa9e4066Sahrens } 4744fa9e4066Sahrens 4745fa9e4066Sahrens if (pp != NULL && pvn_getdirty(pp, flags)) { 4746fa9e4066Sahrens int err; 4747fa9e4066Sahrens 4748fa9e4066Sahrens /* 4749fa9e4066Sahrens * Found a dirty page to push 4750fa9e4066Sahrens */ 4751104e2ed7Sperrin err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 4752104e2ed7Sperrin if (err) 4753fa9e4066Sahrens error = err; 4754fa9e4066Sahrens } else { 4755fa9e4066Sahrens io_len = PAGESIZE; 4756fa9e4066Sahrens } 4757fa9e4066Sahrens } 4758fe9cf88cSperrin out: 475979315247SMatthew Ahrens rangelock_exit(lr); 476055da60b9SMark J Musante if ((flags & B_ASYNC) == 0 || zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 47615002558fSNeil Perrin zil_commit(zfsvfs->z_log, zp->z_id); 4762fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4763fa9e4066Sahrens return (error); 4764fa9e4066Sahrens } 4765fa9e4066Sahrens 4766da6c28aaSamw /*ARGSUSED*/ 4767fa9e4066Sahrens void 4768da6c28aaSamw zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 4769fa9e4066Sahrens { 4770fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4771fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4772fa9e4066Sahrens int error; 4773fa9e4066Sahrens 4774f18faf3fSek rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 47750a586ceaSMark Shellenbaum if (zp->z_sa_hdl == NULL) { 47764ccbb6e7Sahrens /* 4777874395d5Smaybee * The fs has been unmounted, or we did a 4778874395d5Smaybee * suspend/resume and this file no longer exists. 47794ccbb6e7Sahrens */ 4780fa9e4066Sahrens if (vn_has_cached_data(vp)) { 4781fa9e4066Sahrens (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, 4782fa9e4066Sahrens B_INVAL, cr); 4783fa9e4066Sahrens } 4784fa9e4066Sahrens 4785ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 4786cd2adeceSChris Kirby mutex_enter(&vp->v_lock); 4787cd2adeceSChris Kirby ASSERT(vp->v_count == 1); 4788ade42b55SSebastien Roy VN_RELE_LOCKED(vp); 4789cd2adeceSChris Kirby mutex_exit(&vp->v_lock); 47904ccbb6e7Sahrens mutex_exit(&zp->z_lock); 4791f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 4792874395d5Smaybee zfs_znode_free(zp); 4793fa9e4066Sahrens return; 4794fa9e4066Sahrens } 4795fa9e4066Sahrens 4796fa9e4066Sahrens /* 4797fa9e4066Sahrens * Attempt to push any data in the page cache. If this fails 4798fa9e4066Sahrens * we will get kicked out later in zfs_zinactive(). 4799fa9e4066Sahrens */ 48008afd4dd6Sperrin if (vn_has_cached_data(vp)) { 48018afd4dd6Sperrin (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, 48028afd4dd6Sperrin cr); 48038afd4dd6Sperrin } 4804fa9e4066Sahrens 4805893a6d32Sahrens if (zp->z_atime_dirty && zp->z_unlinked == 0) { 4806fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 4807fa9e4066Sahrens 48080a586ceaSMark Shellenbaum dmu_tx_hold_sa(tx, zp->z_sa_hdl, B_FALSE); 48090a586ceaSMark Shellenbaum zfs_sa_upgrade_txholds(tx, zp); 4810fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 4811fa9e4066Sahrens if (error) { 4812fa9e4066Sahrens dmu_tx_abort(tx); 4813fa9e4066Sahrens } else { 4814fa9e4066Sahrens mutex_enter(&zp->z_lock); 48150a586ceaSMark Shellenbaum (void) sa_update(zp->z_sa_hdl, SA_ZPL_ATIME(zfsvfs), 48160a586ceaSMark Shellenbaum (void *)&zp->z_atime, sizeof (zp->z_atime), tx); 4817fa9e4066Sahrens zp->z_atime_dirty = 0; 4818fa9e4066Sahrens mutex_exit(&zp->z_lock); 4819fa9e4066Sahrens dmu_tx_commit(tx); 4820fa9e4066Sahrens } 4821fa9e4066Sahrens } 4822fa9e4066Sahrens 4823fa9e4066Sahrens zfs_zinactive(zp); 4824f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 4825fa9e4066Sahrens } 4826fa9e4066Sahrens 4827fa9e4066Sahrens /* 4828fa9e4066Sahrens * Bounds-check the seek operation. 4829fa9e4066Sahrens * 4830fa9e4066Sahrens * IN: vp - vnode seeking within 4831fa9e4066Sahrens * ooff - old file offset 4832fa9e4066Sahrens * noffp - pointer to new file offset 4833da6c28aaSamw * ct - caller context 4834fa9e4066Sahrens * 4835f7170741SWill Andrews * RETURN: 0 on success, EINVAL if new offset invalid. 4836fa9e4066Sahrens */ 4837fa9e4066Sahrens /* ARGSUSED */ 4838fa9e4066Sahrens static int 4839da6c28aaSamw zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, 4840da6c28aaSamw caller_context_t *ct) 4841fa9e4066Sahrens { 4842fa9e4066Sahrens if (vp->v_type == VDIR) 4843fa9e4066Sahrens return (0); 4844*e4af2f17SToomas Soome return ((*noffp < 0) ? EINVAL : 0); 4845fa9e4066Sahrens } 4846fa9e4066Sahrens 4847fa9e4066Sahrens /* 4848fa9e4066Sahrens * Pre-filter the generic locking function to trap attempts to place 4849fa9e4066Sahrens * a mandatory lock on a memory mapped file. 4850fa9e4066Sahrens */ 4851fa9e4066Sahrens static int 4852fa9e4066Sahrens zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 4853da6c28aaSamw flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct) 4854fa9e4066Sahrens { 4855fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4856fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4857fa9e4066Sahrens 48583cb34c60Sahrens ZFS_ENTER(zfsvfs); 48593cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4860fa9e4066Sahrens 4861fa9e4066Sahrens /* 4862ea8dc4b6Seschrock * We are following the UFS semantics with respect to mapcnt 4863ea8dc4b6Seschrock * here: If we see that the file is mapped already, then we will 4864ea8dc4b6Seschrock * return an error, but we don't worry about races between this 4865ea8dc4b6Seschrock * function and zfs_map(). 4866fa9e4066Sahrens */ 48670a586ceaSMark Shellenbaum if (zp->z_mapcnt > 0 && MANDMODE(zp->z_mode)) { 4868fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4869be6fd75aSMatthew Ahrens return (SET_ERROR(EAGAIN)); 4870fa9e4066Sahrens } 4871fa9e4066Sahrens ZFS_EXIT(zfsvfs); 487204ce3d0bSMark Shellenbaum return (fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct)); 4873fa9e4066Sahrens } 4874fa9e4066Sahrens 4875fa9e4066Sahrens /* 4876fa9e4066Sahrens * If we can't find a page in the cache, we will create a new page 4877fa9e4066Sahrens * and fill it with file data. For efficiency, we may try to fill 4878ac05c741SMark Maybee * multiple pages at once (klustering) to fill up the supplied page 4879ed886187SMark Maybee * list. Note that the pages to be filled are held with an exclusive 4880ed886187SMark Maybee * lock to prevent access by other threads while they are being filled. 4881fa9e4066Sahrens */ 4882fa9e4066Sahrens static int 4883fa9e4066Sahrens zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 4884fa9e4066Sahrens caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 4885fa9e4066Sahrens { 4886fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4887fa9e4066Sahrens page_t *pp, *cur_pp; 4888fa9e4066Sahrens objset_t *os = zp->z_zfsvfs->z_os; 4889fa9e4066Sahrens u_offset_t io_off, total; 4890fa9e4066Sahrens size_t io_len; 4891fa9e4066Sahrens int err; 4892fa9e4066Sahrens 489344eda4d7Smaybee if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 4894ac05c741SMark Maybee /* 4895ac05c741SMark Maybee * We only have a single page, don't bother klustering 4896ac05c741SMark Maybee */ 4897fa9e4066Sahrens io_off = off; 4898fa9e4066Sahrens io_len = PAGESIZE; 4899ed886187SMark Maybee pp = page_create_va(vp, io_off, io_len, 4900ed886187SMark Maybee PG_EXCL | PG_WAIT, seg, addr); 4901fa9e4066Sahrens } else { 4902fa9e4066Sahrens /* 4903ac05c741SMark Maybee * Try to find enough pages to fill the page list 4904fa9e4066Sahrens */ 4905fa9e4066Sahrens pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 4906ac05c741SMark Maybee &io_len, off, plsz, 0); 4907fa9e4066Sahrens } 4908fa9e4066Sahrens if (pp == NULL) { 4909fa9e4066Sahrens /* 4910ac05c741SMark Maybee * The page already exists, nothing to do here. 4911fa9e4066Sahrens */ 4912fa9e4066Sahrens *pl = NULL; 4913fa9e4066Sahrens return (0); 4914fa9e4066Sahrens } 4915fa9e4066Sahrens 4916fa9e4066Sahrens /* 4917fa9e4066Sahrens * Fill the pages in the kluster. 4918fa9e4066Sahrens */ 4919fa9e4066Sahrens cur_pp = pp; 4920fa9e4066Sahrens for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 4921ac05c741SMark Maybee caddr_t va; 4922ac05c741SMark Maybee 492344eda4d7Smaybee ASSERT3U(io_off, ==, cur_pp->p_offset); 49240fab61baSJonathan W Adams va = zfs_map_page(cur_pp, S_WRITE); 49257bfdf011SNeil Perrin err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va, 49267bfdf011SNeil Perrin DMU_READ_PREFETCH); 49270fab61baSJonathan W Adams zfs_unmap_page(cur_pp, va); 4928fa9e4066Sahrens if (err) { 4929fa9e4066Sahrens /* On error, toss the entire kluster */ 4930fa9e4066Sahrens pvn_read_done(pp, B_ERROR); 4931b87f3af3Sperrin /* convert checksum errors into IO errors */ 4932b87f3af3Sperrin if (err == ECKSUM) 4933be6fd75aSMatthew Ahrens err = SET_ERROR(EIO); 4934fa9e4066Sahrens return (err); 4935fa9e4066Sahrens } 4936fa9e4066Sahrens cur_pp = cur_pp->p_next; 4937fa9e4066Sahrens } 4938ac05c741SMark Maybee 4939fa9e4066Sahrens /* 4940ac05c741SMark Maybee * Fill in the page list array from the kluster starting 4941ac05c741SMark Maybee * from the desired offset `off'. 4942fa9e4066Sahrens * NOTE: the page list will always be null terminated. 4943fa9e4066Sahrens */ 4944fa9e4066Sahrens pvn_plist_init(pp, pl, plsz, off, io_len, rw); 4945ac05c741SMark Maybee ASSERT(pl == NULL || (*pl)->p_offset == off); 4946fa9e4066Sahrens 4947fa9e4066Sahrens return (0); 4948fa9e4066Sahrens } 4949fa9e4066Sahrens 4950fa9e4066Sahrens /* 4951fa9e4066Sahrens * Return pointers to the pages for the file region [off, off + len] 4952fa9e4066Sahrens * in the pl array. If plsz is greater than len, this function may 4953ac05c741SMark Maybee * also return page pointers from after the specified region 4954ac05c741SMark Maybee * (i.e. the region [off, off + plsz]). These additional pages are 4955ac05c741SMark Maybee * only returned if they are already in the cache, or were created as 4956ac05c741SMark Maybee * part of a klustered read. 4957fa9e4066Sahrens * 4958fa9e4066Sahrens * IN: vp - vnode of file to get data from. 4959fa9e4066Sahrens * off - position in file to get data from. 4960fa9e4066Sahrens * len - amount of data to retrieve. 4961fa9e4066Sahrens * plsz - length of provided page list. 4962fa9e4066Sahrens * seg - segment to obtain pages for. 4963fa9e4066Sahrens * addr - virtual address of fault. 4964fa9e4066Sahrens * rw - mode of created pages. 4965fa9e4066Sahrens * cr - credentials of caller. 4966da6c28aaSamw * ct - caller context. 4967fa9e4066Sahrens * 4968fa9e4066Sahrens * OUT: protp - protection mode of created pages. 4969fa9e4066Sahrens * pl - list of pages created. 4970fa9e4066Sahrens * 4971f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 4972fa9e4066Sahrens * 4973fa9e4066Sahrens * Timestamps: 4974fa9e4066Sahrens * vp - atime updated 4975fa9e4066Sahrens */ 4976fa9e4066Sahrens /* ARGSUSED */ 4977fa9e4066Sahrens static int 4978fa9e4066Sahrens zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 4979f7170741SWill Andrews page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 4980f7170741SWill Andrews enum seg_rw rw, cred_t *cr, caller_context_t *ct) 4981fa9e4066Sahrens { 4982fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4983fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4984ac05c741SMark Maybee page_t **pl0 = pl; 4985ac05c741SMark Maybee int err = 0; 4986ac05c741SMark Maybee 4987ac05c741SMark Maybee /* we do our own caching, faultahead is unnecessary */ 4988ac05c741SMark Maybee if (pl == NULL) 4989ac05c741SMark Maybee return (0); 4990ac05c741SMark Maybee else if (len > plsz) 4991ac05c741SMark Maybee len = plsz; 499227bd165aSMark Maybee else 499327bd165aSMark Maybee len = P2ROUNDUP(len, PAGESIZE); 4994ac05c741SMark Maybee ASSERT(plsz >= len); 4995fa9e4066Sahrens 49963cb34c60Sahrens ZFS_ENTER(zfsvfs); 49973cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4998fa9e4066Sahrens 4999fa9e4066Sahrens if (protp) 5000fa9e4066Sahrens *protp = PROT_ALL; 5001fa9e4066Sahrens 5002fa9e4066Sahrens /* 5003ed886187SMark Maybee * Loop through the requested range [off, off + len) looking 5004fa9e4066Sahrens * for pages. If we don't find a page, we will need to create 5005fa9e4066Sahrens * a new page and fill it with data from the file. 5006fa9e4066Sahrens */ 5007fa9e4066Sahrens while (len > 0) { 5008ac05c741SMark Maybee if (*pl = page_lookup(vp, off, SE_SHARED)) 5009ac05c741SMark Maybee *(pl+1) = NULL; 5010ac05c741SMark Maybee else if (err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw)) 5011ac05c741SMark Maybee goto out; 5012ac05c741SMark Maybee while (*pl) { 5013ac05c741SMark Maybee ASSERT3U((*pl)->p_offset, ==, off); 5014fa9e4066Sahrens off += PAGESIZE; 5015fa9e4066Sahrens addr += PAGESIZE; 501627bd165aSMark Maybee if (len > 0) { 501727bd165aSMark Maybee ASSERT3U(len, >=, PAGESIZE); 5018ac05c741SMark Maybee len -= PAGESIZE; 501927bd165aSMark Maybee } 5020ac05c741SMark Maybee ASSERT3U(plsz, >=, PAGESIZE); 5021fa9e4066Sahrens plsz -= PAGESIZE; 5022ac05c741SMark Maybee pl++; 5023fa9e4066Sahrens } 5024fa9e4066Sahrens } 5025fa9e4066Sahrens 5026fa9e4066Sahrens /* 5027fa9e4066Sahrens * Fill out the page array with any pages already in the cache. 5028fa9e4066Sahrens */ 5029ac05c741SMark Maybee while (plsz > 0 && 5030ac05c741SMark Maybee (*pl++ = page_lookup_nowait(vp, off, SE_SHARED))) { 5031ac05c741SMark Maybee off += PAGESIZE; 5032ac05c741SMark Maybee plsz -= PAGESIZE; 5033fa9e4066Sahrens } 5034fa9e4066Sahrens out: 5035fe2f476aSperrin if (err) { 5036fe2f476aSperrin /* 5037fe2f476aSperrin * Release any pages we have previously locked. 5038fe2f476aSperrin */ 5039fe2f476aSperrin while (pl > pl0) 5040fe2f476aSperrin page_unlock(*--pl); 5041ac05c741SMark Maybee } else { 5042ac05c741SMark Maybee ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 5043fe2f476aSperrin } 5044fe2f476aSperrin 5045fa9e4066Sahrens *pl = NULL; 5046fa9e4066Sahrens 5047fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5048fa9e4066Sahrens return (err); 5049fa9e4066Sahrens } 5050fa9e4066Sahrens 5051ea8dc4b6Seschrock /* 5052ea8dc4b6Seschrock * Request a memory map for a section of a file. This code interacts 5053ea8dc4b6Seschrock * with common code and the VM system as follows: 5054ea8dc4b6Seschrock * 5055f7170741SWill Andrews * - common code calls mmap(), which ends up in smmap_common() 5056f7170741SWill Andrews * - this calls VOP_MAP(), which takes you into (say) zfs 5057f7170741SWill Andrews * - zfs_map() calls as_map(), passing segvn_create() as the callback 5058f7170741SWill Andrews * - segvn_create() creates the new segment and calls VOP_ADDMAP() 5059f7170741SWill Andrews * - zfs_addmap() updates z_mapcnt 5060ea8dc4b6Seschrock */ 5061da6c28aaSamw /*ARGSUSED*/ 5062fa9e4066Sahrens static int 5063fa9e4066Sahrens zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 5064da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 5065da6c28aaSamw caller_context_t *ct) 5066fa9e4066Sahrens { 5067fa9e4066Sahrens znode_t *zp = VTOZ(vp); 5068fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5069fa9e4066Sahrens segvn_crargs_t vn_a; 5070fa9e4066Sahrens int error; 5071fa9e4066Sahrens 50720616c50eSmarks ZFS_ENTER(zfsvfs); 50730616c50eSmarks ZFS_VERIFY_ZP(zp); 50740616c50eSmarks 50752889ec41SGordon Ross /* 50762889ec41SGordon Ross * Note: ZFS_READONLY is handled in zfs_zaccess_common. 50772889ec41SGordon Ross */ 50782889ec41SGordon Ross 50790a586ceaSMark Shellenbaum if ((prot & PROT_WRITE) && (zp->z_pflags & 50802889ec41SGordon Ross (ZFS_IMMUTABLE | ZFS_APPENDONLY))) { 50810616c50eSmarks ZFS_EXIT(zfsvfs); 5082be6fd75aSMatthew Ahrens return (SET_ERROR(EPERM)); 50830616c50eSmarks } 5084da6c28aaSamw 50850616c50eSmarks if ((prot & (PROT_READ | PROT_EXEC)) && 50860a586ceaSMark Shellenbaum (zp->z_pflags & ZFS_AV_QUARANTINED)) { 50870616c50eSmarks ZFS_EXIT(zfsvfs); 5088be6fd75aSMatthew Ahrens return (SET_ERROR(EACCES)); 50890616c50eSmarks } 5090fa9e4066Sahrens 5091fa9e4066Sahrens if (vp->v_flag & VNOMAP) { 5092fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5093be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSYS)); 5094fa9e4066Sahrens } 5095fa9e4066Sahrens 5096fa9e4066Sahrens if (off < 0 || len > MAXOFFSET_T - off) { 5097fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5098be6fd75aSMatthew Ahrens return (SET_ERROR(ENXIO)); 5099fa9e4066Sahrens } 5100fa9e4066Sahrens 5101fa9e4066Sahrens if (vp->v_type != VREG) { 5102fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5103be6fd75aSMatthew Ahrens return (SET_ERROR(ENODEV)); 5104fa9e4066Sahrens } 5105fa9e4066Sahrens 5106fa9e4066Sahrens /* 5107fa9e4066Sahrens * If file is locked, disallow mapping. 5108fa9e4066Sahrens */ 51090a586ceaSMark Shellenbaum if (MANDMODE(zp->z_mode) && vn_has_flocks(vp)) { 5110ea8dc4b6Seschrock ZFS_EXIT(zfsvfs); 5111be6fd75aSMatthew Ahrens return (SET_ERROR(EAGAIN)); 5112fa9e4066Sahrens } 5113fa9e4066Sahrens 5114fa9e4066Sahrens as_rangelock(as); 511560946fe0Smec error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); 511660946fe0Smec if (error != 0) { 511760946fe0Smec as_rangeunlock(as); 511860946fe0Smec ZFS_EXIT(zfsvfs); 511960946fe0Smec return (error); 5120fa9e4066Sahrens } 5121fa9e4066Sahrens 5122fa9e4066Sahrens vn_a.vp = vp; 5123fa9e4066Sahrens vn_a.offset = (u_offset_t)off; 5124fa9e4066Sahrens vn_a.type = flags & MAP_TYPE; 5125fa9e4066Sahrens vn_a.prot = prot; 5126fa9e4066Sahrens vn_a.maxprot = maxprot; 5127fa9e4066Sahrens vn_a.cred = cr; 5128fa9e4066Sahrens vn_a.amp = NULL; 5129fa9e4066Sahrens vn_a.flags = flags & ~MAP_TYPE; 51304944b02eSkchow vn_a.szc = 0; 51314944b02eSkchow vn_a.lgrp_mem_policy_flags = 0; 5132fa9e4066Sahrens 5133fa9e4066Sahrens error = as_map(as, *addrp, len, segvn_create, &vn_a); 5134fa9e4066Sahrens 5135fa9e4066Sahrens as_rangeunlock(as); 5136fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5137fa9e4066Sahrens return (error); 5138fa9e4066Sahrens } 5139fa9e4066Sahrens 5140fa9e4066Sahrens /* ARGSUSED */ 5141fa9e4066Sahrens static int 5142fa9e4066Sahrens zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 5143da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 5144da6c28aaSamw caller_context_t *ct) 5145fa9e4066Sahrens { 5146ea8dc4b6Seschrock uint64_t pages = btopr(len); 5147ea8dc4b6Seschrock 5148ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 5149fa9e4066Sahrens return (0); 5150fa9e4066Sahrens } 5151fa9e4066Sahrens 5152fa9e4066Sahrens /* ARGSUSED */ 5153fa9e4066Sahrens static int 5154fa9e4066Sahrens zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 5155da6c28aaSamw size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr, 5156da6c28aaSamw caller_context_t *ct) 5157fa9e4066Sahrens { 5158ea8dc4b6Seschrock uint64_t pages = btopr(len); 5159ea8dc4b6Seschrock 5160ea8dc4b6Seschrock ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 5161ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 5162b468a217Seschrock 5163fa9e4066Sahrens return (0); 5164fa9e4066Sahrens } 5165fa9e4066Sahrens 5166fa9e4066Sahrens /* 5167fa9e4066Sahrens * Free or allocate space in a file. Currently, this function only 5168fa9e4066Sahrens * supports the `F_FREESP' command. However, this command is somewhat 5169fa9e4066Sahrens * misnamed, as its functionality includes the ability to allocate as 5170fa9e4066Sahrens * well as free space. 5171fa9e4066Sahrens * 5172fa9e4066Sahrens * IN: vp - vnode of file to free data in. 5173fa9e4066Sahrens * cmd - action to take (only F_FREESP supported). 5174fa9e4066Sahrens * bfp - section of file to free/alloc. 5175fa9e4066Sahrens * flag - current file open mode flags. 5176fa9e4066Sahrens * offset - current file offset. 5177fa9e4066Sahrens * cr - credentials of caller [UNUSED]. 5178da6c28aaSamw * ct - caller context. 5179fa9e4066Sahrens * 5180f7170741SWill Andrews * RETURN: 0 on success, error code on failure. 5181fa9e4066Sahrens * 5182fa9e4066Sahrens * Timestamps: 5183fa9e4066Sahrens * vp - ctime|mtime updated 5184fa9e4066Sahrens */ 5185fa9e4066Sahrens /* ARGSUSED */ 5186fa9e4066Sahrens static int 5187fa9e4066Sahrens zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 5188fa9e4066Sahrens offset_t offset, cred_t *cr, caller_context_t *ct) 5189fa9e4066Sahrens { 5190fa9e4066Sahrens znode_t *zp = VTOZ(vp); 5191fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5192fa9e4066Sahrens uint64_t off, len; 5193fa9e4066Sahrens int error; 5194fa9e4066Sahrens 51953cb34c60Sahrens ZFS_ENTER(zfsvfs); 51963cb34c60Sahrens ZFS_VERIFY_ZP(zp); 5197fa9e4066Sahrens 5198fa9e4066Sahrens if (cmd != F_FREESP) { 5199fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5200be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 5201fa9e4066Sahrens } 5202fa9e4066Sahrens 52032144b121SMarcel Telka /* 52042144b121SMarcel Telka * In a case vp->v_vfsp != zp->z_zfsvfs->z_vfs (e.g. snapshots) our 52052144b121SMarcel Telka * callers might not be able to detect properly that we are read-only, 52062144b121SMarcel Telka * so check it explicitly here. 52072144b121SMarcel Telka */ 52082144b121SMarcel Telka if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 52092144b121SMarcel Telka ZFS_EXIT(zfsvfs); 52102144b121SMarcel Telka return (SET_ERROR(EROFS)); 52112144b121SMarcel Telka } 52122144b121SMarcel Telka 5213fa9e4066Sahrens if (error = convoff(vp, bfp, 0, offset)) { 5214fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5215fa9e4066Sahrens return (error); 5216fa9e4066Sahrens } 5217fa9e4066Sahrens 5218fa9e4066Sahrens if (bfp->l_len < 0) { 5219fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5220be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 5221fa9e4066Sahrens } 5222fa9e4066Sahrens 5223fa9e4066Sahrens off = bfp->l_start; 5224104e2ed7Sperrin len = bfp->l_len; /* 0 means from off to end of file */ 5225104e2ed7Sperrin 5226cdb0ab79Smaybee error = zfs_freesp(zp, off, len, flag, TRUE); 5227fa9e4066Sahrens 522872102e74SBryan Cantrill if (error == 0 && off == 0 && len == 0) 522972102e74SBryan Cantrill vnevent_truncate(ZTOV(zp), ct); 523072102e74SBryan Cantrill 5231fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5232fa9e4066Sahrens return (error); 5233fa9e4066Sahrens } 5234fa9e4066Sahrens 5235da6c28aaSamw /*ARGSUSED*/ 5236fa9e4066Sahrens static int 5237da6c28aaSamw zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct) 5238fa9e4066Sahrens { 5239fa9e4066Sahrens znode_t *zp = VTOZ(vp); 5240fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5241f18faf3fSek uint32_t gen; 52420a586ceaSMark Shellenbaum uint64_t gen64; 5243fa9e4066Sahrens uint64_t object = zp->z_id; 5244fa9e4066Sahrens zfid_short_t *zfid; 52450a586ceaSMark Shellenbaum int size, i, error; 5246fa9e4066Sahrens 52473cb34c60Sahrens ZFS_ENTER(zfsvfs); 52483cb34c60Sahrens ZFS_VERIFY_ZP(zp); 52490a586ceaSMark Shellenbaum 52500a586ceaSMark Shellenbaum if ((error = sa_lookup(zp->z_sa_hdl, SA_ZPL_GEN(zfsvfs), 5251f3e6fb2fSMark Shellenbaum &gen64, sizeof (uint64_t))) != 0) { 5252f3e6fb2fSMark Shellenbaum ZFS_EXIT(zfsvfs); 52530a586ceaSMark Shellenbaum return (error); 5254f3e6fb2fSMark Shellenbaum } 52550a586ceaSMark Shellenbaum 52560a586ceaSMark Shellenbaum gen = (uint32_t)gen64; 5257fa9e4066Sahrens 5258fa9e4066Sahrens size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 5259fa9e4066Sahrens if (fidp->fid_len < size) { 5260fa9e4066Sahrens fidp->fid_len = size; 52610f2dc02eSek ZFS_EXIT(zfsvfs); 5262be6fd75aSMatthew Ahrens return (SET_ERROR(ENOSPC)); 5263fa9e4066Sahrens } 5264fa9e4066Sahrens 5265fa9e4066Sahrens zfid = (zfid_short_t *)fidp; 5266fa9e4066Sahrens 5267fa9e4066Sahrens zfid->zf_len = size; 5268fa9e4066Sahrens 5269fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_object); i++) 5270fa9e4066Sahrens zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 5271fa9e4066Sahrens 5272fa9e4066Sahrens /* Must have a non-zero generation number to distinguish from .zfs */ 5273fa9e4066Sahrens if (gen == 0) 5274fa9e4066Sahrens gen = 1; 5275fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_gen); i++) 5276fa9e4066Sahrens zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 5277fa9e4066Sahrens 5278fa9e4066Sahrens if (size == LONG_FID_LEN) { 5279fa9e4066Sahrens uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 5280fa9e4066Sahrens zfid_long_t *zlfid; 5281fa9e4066Sahrens 5282fa9e4066Sahrens zlfid = (zfid_long_t *)fidp; 5283fa9e4066Sahrens 5284fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setid); i++) 5285fa9e4066Sahrens zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 5286fa9e4066Sahrens 5287fa9e4066Sahrens /* XXX - this should be the generation number for the objset */ 5288fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 5289fa9e4066Sahrens zlfid->zf_setgen[i] = 0; 5290fa9e4066Sahrens } 5291fa9e4066Sahrens 5292fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5293fa9e4066Sahrens return (0); 5294fa9e4066Sahrens } 5295fa9e4066Sahrens 5296fa9e4066Sahrens static int 5297da6c28aaSamw zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, 5298da6c28aaSamw caller_context_t *ct) 5299fa9e4066Sahrens { 5300fa9e4066Sahrens znode_t *zp, *xzp; 5301fa9e4066Sahrens zfsvfs_t *zfsvfs; 5302fa9e4066Sahrens zfs_dirlock_t *dl; 5303fa9e4066Sahrens int error; 5304fa9e4066Sahrens 5305fa9e4066Sahrens switch (cmd) { 5306fa9e4066Sahrens case _PC_LINK_MAX: 5307fa9e4066Sahrens *valp = ULONG_MAX; 5308fa9e4066Sahrens return (0); 5309fa9e4066Sahrens 5310fa9e4066Sahrens case _PC_FILESIZEBITS: 5311fa9e4066Sahrens *valp = 64; 5312fa9e4066Sahrens return (0); 5313fa9e4066Sahrens 5314fa9e4066Sahrens case _PC_XATTR_EXISTS: 5315fa9e4066Sahrens zp = VTOZ(vp); 5316fa9e4066Sahrens zfsvfs = zp->z_zfsvfs; 53173cb34c60Sahrens ZFS_ENTER(zfsvfs); 53183cb34c60Sahrens ZFS_VERIFY_ZP(zp); 5319fa9e4066Sahrens *valp = 0; 5320fa9e4066Sahrens error = zfs_dirent_lock(&dl, zp, "", &xzp, 5321da6c28aaSamw ZXATTR | ZEXISTS | ZSHARED, NULL, NULL); 5322fa9e4066Sahrens if (error == 0) { 5323fa9e4066Sahrens zfs_dirent_unlock(dl); 5324fa9e4066Sahrens if (!zfs_dirempty(xzp)) 5325fa9e4066Sahrens *valp = 1; 5326fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 5327fa9e4066Sahrens } else if (error == ENOENT) { 5328fa9e4066Sahrens /* 5329fa9e4066Sahrens * If there aren't extended attributes, it's the 5330fa9e4066Sahrens * same as having zero of them. 5331fa9e4066Sahrens */ 5332fa9e4066Sahrens error = 0; 5333fa9e4066Sahrens } 5334fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5335fa9e4066Sahrens return (error); 5336fa9e4066Sahrens 5337da6c28aaSamw case _PC_SATTR_ENABLED: 5338da6c28aaSamw case _PC_SATTR_EXISTS: 53399660e5cbSJanice Chang *valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 5340da6c28aaSamw (vp->v_type == VREG || vp->v_type == VDIR); 5341da6c28aaSamw return (0); 5342da6c28aaSamw 5343e802abbdSTim Haley case _PC_ACCESS_FILTERING: 5344e802abbdSTim Haley *valp = vfs_has_feature(vp->v_vfsp, VFSFT_ACCESS_FILTER) && 5345e802abbdSTim Haley vp->v_type == VDIR; 5346e802abbdSTim Haley return (0); 5347e802abbdSTim Haley 5348fa9e4066Sahrens case _PC_ACL_ENABLED: 5349fa9e4066Sahrens *valp = _ACL_ACE_ENABLED; 5350fa9e4066Sahrens return (0); 5351fa9e4066Sahrens 5352fa9e4066Sahrens case _PC_MIN_HOLE_SIZE: 5353fa9e4066Sahrens *valp = (ulong_t)SPA_MINBLOCKSIZE; 5354fa9e4066Sahrens return (0); 5355fa9e4066Sahrens 53563b862e9aSRoger A. Faulkner case _PC_TIMESTAMP_RESOLUTION: 53573b862e9aSRoger A. Faulkner /* nanosecond timestamp resolution */ 53583b862e9aSRoger A. Faulkner *valp = 1L; 53593b862e9aSRoger A. Faulkner return (0); 53603b862e9aSRoger A. Faulkner 5361fa9e4066Sahrens default: 5362da6c28aaSamw return (fs_pathconf(vp, cmd, valp, cr, ct)); 5363fa9e4066Sahrens } 5364fa9e4066Sahrens } 5365fa9e4066Sahrens 5366fa9e4066Sahrens /*ARGSUSED*/ 5367fa9e4066Sahrens static int 5368da6c28aaSamw zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 5369da6c28aaSamw caller_context_t *ct) 5370fa9e4066Sahrens { 5371fa9e4066Sahrens znode_t *zp = VTOZ(vp); 5372fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5373fa9e4066Sahrens int error; 5374da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 5375fa9e4066Sahrens 53763cb34c60Sahrens ZFS_ENTER(zfsvfs); 53773cb34c60Sahrens ZFS_VERIFY_ZP(zp); 5378da6c28aaSamw error = zfs_getacl(zp, vsecp, skipaclchk, cr); 5379fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5380fa9e4066Sahrens 5381fa9e4066Sahrens return (error); 5382fa9e4066Sahrens } 5383fa9e4066Sahrens 5384fa9e4066Sahrens /*ARGSUSED*/ 5385fa9e4066Sahrens static int 5386da6c28aaSamw zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 5387da6c28aaSamw caller_context_t *ct) 5388fa9e4066Sahrens { 5389fa9e4066Sahrens znode_t *zp = VTOZ(vp); 5390fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5391fa9e4066Sahrens int error; 5392da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 539355da60b9SMark J Musante zilog_t *zilog = zfsvfs->z_log; 5394fa9e4066Sahrens 53953cb34c60Sahrens ZFS_ENTER(zfsvfs); 53963cb34c60Sahrens ZFS_VERIFY_ZP(zp); 539755da60b9SMark J Musante 5398da6c28aaSamw error = zfs_setacl(zp, vsecp, skipaclchk, cr); 539955da60b9SMark J Musante 540055da60b9SMark J Musante if (zfsvfs->z_os->os_sync == ZFS_SYNC_ALWAYS) 54015002558fSNeil Perrin zil_commit(zilog, 0); 540255da60b9SMark J Musante 5403fa9e4066Sahrens ZFS_EXIT(zfsvfs); 5404fa9e4066Sahrens return (error); 5405fa9e4066Sahrens } 5406fa9e4066Sahrens 5407c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 5408f7170741SWill Andrews * The smallest read we may consider to loan out an arcbuf. 5409f7170741SWill Andrews * This must be a power of 2. 5410c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 5411c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int zcr_blksz_min = (1 << 10); /* 1K */ 5412f7170741SWill Andrews /* 5413f7170741SWill Andrews * If set to less than the file block size, allow loaning out of an 5414f7170741SWill Andrews * arcbuf for a partial block read. This must be a power of 2. 5415f7170741SWill Andrews */ 5416c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int zcr_blksz_max = (1 << 17); /* 128K */ 5417c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5418c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /*ARGSUSED*/ 5419c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static int 5420c242f9a0Schunli zhang - Sun Microsystems - Irvine United States zfs_reqzcbuf(vnode_t *vp, enum uio_rw ioflag, xuio_t *xuio, cred_t *cr, 5421c242f9a0Schunli zhang - Sun Microsystems - Irvine United States caller_context_t *ct) 5422c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 5423c242f9a0Schunli zhang - Sun Microsystems - Irvine United States znode_t *zp = VTOZ(vp); 5424c242f9a0Schunli zhang - Sun Microsystems - Irvine United States zfsvfs_t *zfsvfs = zp->z_zfsvfs; 5425c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int max_blksz = zfsvfs->z_max_blksz; 5426c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 5427c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ssize_t size = uio->uio_resid; 5428c242f9a0Schunli zhang - Sun Microsystems - Irvine United States offset_t offset = uio->uio_loffset; 5429c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int blksz; 5430c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int fullblk, i; 5431c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *abuf; 5432c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ssize_t maxsize; 5433c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int preamble, postamble; 5434c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5435c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio->xu_type != UIOTYPE_ZEROCOPY) 5436be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 5437c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5438c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_ENTER(zfsvfs); 5439c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_VERIFY_ZP(zp); 5440c242f9a0Schunli zhang - Sun Microsystems - Irvine United States switch (ioflag) { 5441c242f9a0Schunli zhang - Sun Microsystems - Irvine United States case UIO_WRITE: 5442c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 5443c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Loan out an arc_buf for write if write size is bigger than 5444c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * max_blksz, and the file's block size is also max_blksz. 5445c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 5446c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz = max_blksz; 5447c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (size < blksz || zp->z_blksz != blksz) { 5448c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 5449be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 5450c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5451c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 5452c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Caller requests buffers for write before knowing where the 5453c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * write offset might be (e.g. NFS TCP write). 5454c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 5455c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (offset == -1) { 5456c242f9a0Schunli zhang - Sun Microsystems - Irvine United States preamble = 0; 5457c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 5458c242f9a0Schunli zhang - Sun Microsystems - Irvine United States preamble = P2PHASE(offset, blksz); 5459c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (preamble) { 5460c242f9a0Schunli zhang - Sun Microsystems - Irvine United States preamble = blksz - preamble; 5461c242f9a0Schunli zhang - Sun Microsystems - Irvine United States size -= preamble; 5462c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5463c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5464c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5465c242f9a0Schunli zhang - Sun Microsystems - Irvine United States postamble = P2PHASE(size, blksz); 5466c242f9a0Schunli zhang - Sun Microsystems - Irvine United States size -= postamble; 5467c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5468c242f9a0Schunli zhang - Sun Microsystems - Irvine United States fullblk = size / blksz; 5469570de38fSSurya Prakki (void) dmu_xuio_init(xuio, 5470c242f9a0Schunli zhang - Sun Microsystems - Irvine United States (preamble != 0) + fullblk + (postamble != 0)); 5471c242f9a0Schunli zhang - Sun Microsystems - Irvine United States DTRACE_PROBE3(zfs_reqzcbuf_align, int, preamble, 5472c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int, postamble, int, 5473c242f9a0Schunli zhang - Sun Microsystems - Irvine United States (preamble != 0) + fullblk + (postamble != 0)); 5474c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5475c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 5476c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Have to fix iov base/len for partial buffers. They 5477c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * currently represent full arc_buf's. 5478c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 5479c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (preamble) { 5480c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* data begins in the middle of the arc_buf */ 54810a586ceaSMark Shellenbaum abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 54820a586ceaSMark Shellenbaum blksz); 5483c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(abuf); 5484570de38fSSurya Prakki (void) dmu_xuio_add(xuio, abuf, 5485570de38fSSurya Prakki blksz - preamble, preamble); 5486c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5487c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5488c242f9a0Schunli zhang - Sun Microsystems - Irvine United States for (i = 0; i < fullblk; i++) { 54890a586ceaSMark Shellenbaum abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 54900a586ceaSMark Shellenbaum blksz); 5491c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(abuf); 5492570de38fSSurya Prakki (void) dmu_xuio_add(xuio, abuf, 0, blksz); 5493c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5494c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5495c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (postamble) { 5496c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* data ends in the middle of the arc_buf */ 54970a586ceaSMark Shellenbaum abuf = dmu_request_arcbuf(sa_get_db(zp->z_sa_hdl), 54980a586ceaSMark Shellenbaum blksz); 5499c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(abuf); 5500570de38fSSurya Prakki (void) dmu_xuio_add(xuio, abuf, 0, postamble); 5501c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5502c242f9a0Schunli zhang - Sun Microsystems - Irvine United States break; 5503c242f9a0Schunli zhang - Sun Microsystems - Irvine United States case UIO_READ: 5504c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 5505c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Loan out an arc_buf for read if the read size is larger than 5506c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * the current file block size. Block alignment is not 5507c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * considered. Partial arc_buf will be loaned out for read. 5508c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 5509c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz = zp->z_blksz; 5510c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (blksz < zcr_blksz_min) 5511c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz = zcr_blksz_min; 5512c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (blksz > zcr_blksz_max) 5513c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz = zcr_blksz_max; 5514c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* avoid potential complexity of dealing with it */ 5515c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (blksz > max_blksz) { 5516c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 5517be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 5518c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5519c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 55200a586ceaSMark Shellenbaum maxsize = zp->z_size - uio->uio_loffset; 5521c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (size > maxsize) 5522c242f9a0Schunli zhang - Sun Microsystems - Irvine United States size = maxsize; 5523c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5524c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (size < blksz || vn_has_cached_data(vp)) { 5525c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 5526be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 5527c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5528c242f9a0Schunli zhang - Sun Microsystems - Irvine United States break; 5529c242f9a0Schunli zhang - Sun Microsystems - Irvine United States default: 5530c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 5531be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 5532c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5533c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5534c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_extflg = UIO_XUIO; 5535c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIO_XUZC_RW(xuio) = ioflag; 5536c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 5537c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 5538c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5539c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5540c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /*ARGSUSED*/ 5541c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static int 5542c242f9a0Schunli zhang - Sun Microsystems - Irvine United States zfs_retzcbuf(vnode_t *vp, xuio_t *xuio, cred_t *cr, caller_context_t *ct) 5543c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 5544c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int i; 5545c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *abuf; 5546c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int ioflag = XUIO_XUZC_RW(xuio); 5547c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5548c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(xuio->xu_type == UIOTYPE_ZEROCOPY); 5549c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5550c242f9a0Schunli zhang - Sun Microsystems - Irvine United States i = dmu_xuio_cnt(xuio); 5551c242f9a0Schunli zhang - Sun Microsystems - Irvine United States while (i-- > 0) { 5552c242f9a0Schunli zhang - Sun Microsystems - Irvine United States abuf = dmu_xuio_arcbuf(xuio, i); 5553c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 5554c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * if abuf == NULL, it must be a write buffer 5555c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * that has been returned in zfs_write(). 5556c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 5557c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (abuf) 5558c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_return_arcbuf(abuf); 5559c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(abuf || ioflag == UIO_WRITE); 5560c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5561c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5562c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_fini(xuio); 5563c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 5564c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 5565c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 5566fa9e4066Sahrens /* 5567fa9e4066Sahrens * Predeclare these here so that the compiler assumes that 5568fa9e4066Sahrens * this is an "old style" function declaration that does 5569fa9e4066Sahrens * not include arguments => we won't get type mismatch errors 5570fa9e4066Sahrens * in the initializations that follow. 5571fa9e4066Sahrens */ 5572fa9e4066Sahrens static int zfs_inval(); 5573fa9e4066Sahrens static int zfs_isdir(); 5574fa9e4066Sahrens 5575fa9e4066Sahrens static int 5576fa9e4066Sahrens zfs_inval() 5577fa9e4066Sahrens { 5578be6fd75aSMatthew Ahrens return (SET_ERROR(EINVAL)); 5579fa9e4066Sahrens } 5580fa9e4066Sahrens 5581fa9e4066Sahrens static int 5582fa9e4066Sahrens zfs_isdir() 5583fa9e4066Sahrens { 5584be6fd75aSMatthew Ahrens return (SET_ERROR(EISDIR)); 5585fa9e4066Sahrens } 5586fa9e4066Sahrens /* 5587fa9e4066Sahrens * Directory vnode operations template 5588fa9e4066Sahrens */ 5589fa9e4066Sahrens const fs_operation_def_t zfs_dvnodeops_template[] = { 5590aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 5591aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 5592aa59c4cbSrsb VOPNAME_READ, { .error = zfs_isdir }, 5593aa59c4cbSrsb VOPNAME_WRITE, { .error = zfs_isdir }, 5594aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 5595aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5596aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5597aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 5598aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 5599aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 5600aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 5601aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 5602aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5603aa59c4cbSrsb VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, 5604aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 5605aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 5606aa59c4cbSrsb VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, 5607aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 5608aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5609aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 5610aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 5611aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5612aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5613aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 56144bb73804SMatthew Ahrens VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5615aa59c4cbSrsb NULL, NULL 5616fa9e4066Sahrens }; 5617fa9e4066Sahrens 5618fa9e4066Sahrens /* 5619fa9e4066Sahrens * Regular file vnode operations template 5620fa9e4066Sahrens */ 5621fa9e4066Sahrens const fs_operation_def_t zfs_fvnodeops_template[] = { 5622aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 5623aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 5624aa59c4cbSrsb VOPNAME_READ, { .vop_read = zfs_read }, 5625aa59c4cbSrsb VOPNAME_WRITE, { .vop_write = zfs_write }, 5626aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 5627aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5628aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5629aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 5630aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 5631aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5632aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 5633aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5634aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 5635aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 5636aa59c4cbSrsb VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, 5637aa59c4cbSrsb VOPNAME_SPACE, { .vop_space = zfs_space }, 5638aa59c4cbSrsb VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, 5639aa59c4cbSrsb VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, 5640aa59c4cbSrsb VOPNAME_MAP, { .vop_map = zfs_map }, 5641aa59c4cbSrsb VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, 5642aa59c4cbSrsb VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, 5643aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5644aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5645aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5646aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 56474bb73804SMatthew Ahrens VOPNAME_REQZCBUF, { .vop_reqzcbuf = zfs_reqzcbuf }, 56484bb73804SMatthew Ahrens VOPNAME_RETZCBUF, { .vop_retzcbuf = zfs_retzcbuf }, 5649aa59c4cbSrsb NULL, NULL 5650fa9e4066Sahrens }; 5651fa9e4066Sahrens 5652fa9e4066Sahrens /* 5653fa9e4066Sahrens * Symbolic link vnode operations template 5654fa9e4066Sahrens */ 5655fa9e4066Sahrens const fs_operation_def_t zfs_symvnodeops_template[] = { 5656aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5657aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5658aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 5659aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5660aa59c4cbSrsb VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, 5661aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5662aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 5663aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5664aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5665aa59c4cbSrsb NULL, NULL 5666fa9e4066Sahrens }; 5667fa9e4066Sahrens 5668743a77edSAlan Wright /* 5669743a77edSAlan Wright * special share hidden files vnode operations template 5670743a77edSAlan Wright */ 5671743a77edSAlan Wright const fs_operation_def_t zfs_sharevnodeops_template[] = { 5672743a77edSAlan Wright VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5673743a77edSAlan Wright VOPNAME_ACCESS, { .vop_access = zfs_access }, 5674743a77edSAlan Wright VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5675743a77edSAlan Wright VOPNAME_FID, { .vop_fid = zfs_fid }, 5676743a77edSAlan Wright VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5677743a77edSAlan Wright VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5678743a77edSAlan Wright VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5679743a77edSAlan Wright VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5680743a77edSAlan Wright NULL, NULL 5681743a77edSAlan Wright }; 5682743a77edSAlan Wright 5683fa9e4066Sahrens /* 5684fa9e4066Sahrens * Extended attribute directory vnode operations template 5685f7170741SWill Andrews * 5686f7170741SWill Andrews * This template is identical to the directory vnodes 5687f7170741SWill Andrews * operation template except for restricted operations: 5688f7170741SWill Andrews * VOP_MKDIR() 5689f7170741SWill Andrews * VOP_SYMLINK() 5690f7170741SWill Andrews * 5691fa9e4066Sahrens * Note that there are other restrictions embedded in: 5692fa9e4066Sahrens * zfs_create() - restrict type to VREG 5693fa9e4066Sahrens * zfs_link() - no links into/out of attribute space 5694fa9e4066Sahrens * zfs_rename() - no moves into/out of attribute space 5695fa9e4066Sahrens */ 5696fa9e4066Sahrens const fs_operation_def_t zfs_xdvnodeops_template[] = { 5697aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 5698aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 5699aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 5700aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 5701aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 5702aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 5703aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 5704aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 5705aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 5706aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 5707aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 5708aa59c4cbSrsb VOPNAME_MKDIR, { .error = zfs_inval }, 5709aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 5710aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 5711aa59c4cbSrsb VOPNAME_SYMLINK, { .error = zfs_inval }, 5712aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 5713aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5714aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 5715aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 5716aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5717aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 5718aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 5719aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 5720aa59c4cbSrsb NULL, NULL 5721fa9e4066Sahrens }; 5722fa9e4066Sahrens 5723fa9e4066Sahrens /* 5724fa9e4066Sahrens * Error vnode operations template 5725fa9e4066Sahrens */ 5726fa9e4066Sahrens const fs_operation_def_t zfs_evnodeops_template[] = { 5727aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 5728aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 5729aa59c4cbSrsb NULL, NULL 5730fa9e4066Sahrens }; 5731