1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5736b9155Smarks * Common Development and Distribution License (the "License"). 6736b9155Smarks * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22bda89588Sjp * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 2675c76197Speteh /* Portions Copyright 2007 Jeremy Teo */ 2775c76197Speteh 28fa9e4066Sahrens #include <sys/types.h> 29fa9e4066Sahrens #include <sys/param.h> 30fa9e4066Sahrens #include <sys/time.h> 31fa9e4066Sahrens #include <sys/systm.h> 32fa9e4066Sahrens #include <sys/sysmacros.h> 33fa9e4066Sahrens #include <sys/resource.h> 34fa9e4066Sahrens #include <sys/vfs.h> 35aa59c4cbSrsb #include <sys/vfs_opreg.h> 36fa9e4066Sahrens #include <sys/vnode.h> 37fa9e4066Sahrens #include <sys/file.h> 38fa9e4066Sahrens #include <sys/stat.h> 39fa9e4066Sahrens #include <sys/kmem.h> 40fa9e4066Sahrens #include <sys/taskq.h> 41fa9e4066Sahrens #include <sys/uio.h> 42fa9e4066Sahrens #include <sys/vmsystm.h> 43fa9e4066Sahrens #include <sys/atomic.h> 4444eda4d7Smaybee #include <sys/vm.h> 45fa9e4066Sahrens #include <vm/seg_vn.h> 46fa9e4066Sahrens #include <vm/pvn.h> 47fa9e4066Sahrens #include <vm/as.h> 480fab61baSJonathan W Adams #include <vm/kpm.h> 490fab61baSJonathan W Adams #include <vm/seg_kpm.h> 50fa9e4066Sahrens #include <sys/mman.h> 51fa9e4066Sahrens #include <sys/pathname.h> 52fa9e4066Sahrens #include <sys/cmn_err.h> 53fa9e4066Sahrens #include <sys/errno.h> 54fa9e4066Sahrens #include <sys/unistd.h> 55fa9e4066Sahrens #include <sys/zfs_dir.h> 56fa9e4066Sahrens #include <sys/zfs_acl.h> 57fa9e4066Sahrens #include <sys/zfs_ioctl.h> 58fa9e4066Sahrens #include <sys/fs/zfs.h> 59fa9e4066Sahrens #include <sys/dmu.h> 60fa9e4066Sahrens #include <sys/spa.h> 61fa9e4066Sahrens #include <sys/txg.h> 62fa9e4066Sahrens #include <sys/dbuf.h> 63fa9e4066Sahrens #include <sys/zap.h> 64fa9e4066Sahrens #include <sys/dirent.h> 65fa9e4066Sahrens #include <sys/policy.h> 66fa9e4066Sahrens #include <sys/sunddi.h> 67fa9e4066Sahrens #include <sys/filio.h> 68*c1ce5987SMark Shellenbaum #include <sys/sid.h> 69fa9e4066Sahrens #include "fs/fs_subr.h" 70fa9e4066Sahrens #include <sys/zfs_ctldir.h> 71da6c28aaSamw #include <sys/zfs_fuid.h> 72033f9833Sek #include <sys/dnlc.h> 73104e2ed7Sperrin #include <sys/zfs_rlock.h> 74da6c28aaSamw #include <sys/extdirent.h> 75da6c28aaSamw #include <sys/kidmap.h> 76da6c28aaSamw #include <sys/cred_impl.h> 77b38f0970Sck #include <sys/attr.h> 78fa9e4066Sahrens 79fa9e4066Sahrens /* 80fa9e4066Sahrens * Programming rules. 81fa9e4066Sahrens * 82fa9e4066Sahrens * Each vnode op performs some logical unit of work. To do this, the ZPL must 83fa9e4066Sahrens * properly lock its in-core state, create a DMU transaction, do the work, 84fa9e4066Sahrens * record this work in the intent log (ZIL), commit the DMU transaction, 85da6c28aaSamw * and wait for the intent log to commit if it is a synchronous operation. 86da6c28aaSamw * Moreover, the vnode ops must work in both normal and log replay context. 87fa9e4066Sahrens * The ordering of events is important to avoid deadlocks and references 88fa9e4066Sahrens * to freed memory. The example below illustrates the following Big Rules: 89fa9e4066Sahrens * 90fa9e4066Sahrens * (1) A check must be made in each zfs thread for a mounted file system. 913cb34c60Sahrens * This is done avoiding races using ZFS_ENTER(zfsvfs). 923cb34c60Sahrens * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes 933cb34c60Sahrens * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros 943cb34c60Sahrens * can return EIO from the calling function. 95fa9e4066Sahrens * 96fa9e4066Sahrens * (2) VN_RELE() should always be the last thing except for zil_commit() 97b19a79ecSperrin * (if necessary) and ZFS_EXIT(). This is for 3 reasons: 98fa9e4066Sahrens * First, if it's the last reference, the vnode/znode 99fa9e4066Sahrens * can be freed, so the zp may point to freed memory. Second, the last 100fa9e4066Sahrens * reference will call zfs_zinactive(), which may induce a lot of work -- 101104e2ed7Sperrin * pushing cached pages (which acquires range locks) and syncing out 102fa9e4066Sahrens * cached atime changes. Third, zfs_zinactive() may require a new tx, 103fa9e4066Sahrens * which could deadlock the system if you were already holding one. 104fa9e4066Sahrens * 1057885c754Sperrin * (3) All range locks must be grabbed before calling dmu_tx_assign(), 1067885c754Sperrin * as they can span dmu_tx_assign() calls. 1077885c754Sperrin * 1087885c754Sperrin * (4) Always pass zfsvfs->z_assign as the second argument to dmu_tx_assign(). 109fa9e4066Sahrens * In normal operation, this will be TXG_NOWAIT. During ZIL replay, 110fa9e4066Sahrens * it will be a specific txg. Either way, dmu_tx_assign() never blocks. 111fa9e4066Sahrens * This is critical because we don't want to block while holding locks. 112fa9e4066Sahrens * Note, in particular, that if a lock is sometimes acquired before 113fa9e4066Sahrens * the tx assigns, and sometimes after (e.g. z_lock), then failing to 114fa9e4066Sahrens * use a non-blocking assign can deadlock the system. The scenario: 115fa9e4066Sahrens * 116fa9e4066Sahrens * Thread A has grabbed a lock before calling dmu_tx_assign(). 117fa9e4066Sahrens * Thread B is in an already-assigned tx, and blocks for this lock. 118fa9e4066Sahrens * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 119fa9e4066Sahrens * forever, because the previous txg can't quiesce until B's tx commits. 120fa9e4066Sahrens * 121fa9e4066Sahrens * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 1228a2f1b91Sahrens * then drop all locks, call dmu_tx_wait(), and try again. 123fa9e4066Sahrens * 1247885c754Sperrin * (5) If the operation succeeded, generate the intent log entry for it 125fa9e4066Sahrens * before dropping locks. This ensures that the ordering of events 126fa9e4066Sahrens * in the intent log matches the order in which they actually occurred. 127fa9e4066Sahrens * 1287885c754Sperrin * (6) At the end of each vnode op, the DMU tx must always commit, 129fa9e4066Sahrens * regardless of whether there were any errors. 130fa9e4066Sahrens * 131b19a79ecSperrin * (7) After dropping all locks, invoke zil_commit(zilog, seq, foid) 132fa9e4066Sahrens * to ensure that synchronous semantics are provided when necessary. 133fa9e4066Sahrens * 134fa9e4066Sahrens * In general, this is how things should be ordered in each vnode op: 135fa9e4066Sahrens * 136fa9e4066Sahrens * ZFS_ENTER(zfsvfs); // exit if unmounted 137fa9e4066Sahrens * top: 138fa9e4066Sahrens * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 139fa9e4066Sahrens * rw_enter(...); // grab any other locks you need 140fa9e4066Sahrens * tx = dmu_tx_create(...); // get DMU tx 141fa9e4066Sahrens * dmu_tx_hold_*(); // hold each object you might modify 142fa9e4066Sahrens * error = dmu_tx_assign(tx, zfsvfs->z_assign); // try to assign 143fa9e4066Sahrens * if (error) { 144fa9e4066Sahrens * rw_exit(...); // drop locks 145fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 146fa9e4066Sahrens * VN_RELE(...); // release held vnodes 147fa9e4066Sahrens * if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 1488a2f1b91Sahrens * dmu_tx_wait(tx); 1498a2f1b91Sahrens * dmu_tx_abort(tx); 150fa9e4066Sahrens * goto top; 151fa9e4066Sahrens * } 1528a2f1b91Sahrens * dmu_tx_abort(tx); // abort DMU tx 153fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 154fa9e4066Sahrens * return (error); // really out of space 155fa9e4066Sahrens * } 156fa9e4066Sahrens * error = do_real_work(); // do whatever this VOP does 157fa9e4066Sahrens * if (error == 0) 158b19a79ecSperrin * zfs_log_*(...); // on success, make ZIL entry 159fa9e4066Sahrens * dmu_tx_commit(tx); // commit DMU tx -- error or not 160fa9e4066Sahrens * rw_exit(...); // drop locks 161fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 162fa9e4066Sahrens * VN_RELE(...); // release held vnodes 163b19a79ecSperrin * zil_commit(zilog, seq, foid); // synchronous when necessary 164fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 165fa9e4066Sahrens * return (error); // done, report error 166fa9e4066Sahrens */ 1673cb34c60Sahrens 168fa9e4066Sahrens /* ARGSUSED */ 169fa9e4066Sahrens static int 170da6c28aaSamw zfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) 171fa9e4066Sahrens { 17267bd71c6Sperrin znode_t *zp = VTOZ(*vpp); 173b614fdaaSMark Shellenbaum zfsvfs_t *zfsvfs = zp->z_zfsvfs; 174b614fdaaSMark Shellenbaum 175b614fdaaSMark Shellenbaum ZFS_ENTER(zfsvfs); 176b614fdaaSMark Shellenbaum ZFS_VERIFY_ZP(zp); 17767bd71c6Sperrin 178da6c28aaSamw if ((flag & FWRITE) && (zp->z_phys->zp_flags & ZFS_APPENDONLY) && 179da6c28aaSamw ((flag & FAPPEND) == 0)) { 180b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 181da6c28aaSamw return (EPERM); 182da6c28aaSamw } 183da6c28aaSamw 184da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 185da6c28aaSamw ZTOV(zp)->v_type == VREG && 186da6c28aaSamw !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) && 187b614fdaaSMark Shellenbaum zp->z_phys->zp_size > 0) { 188b614fdaaSMark Shellenbaum if (fs_vscan(*vpp, cr, 0) != 0) { 189b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 190da6c28aaSamw return (EACCES); 191b614fdaaSMark Shellenbaum } 192b614fdaaSMark Shellenbaum } 193da6c28aaSamw 19467bd71c6Sperrin /* Keep a count of the synchronous opens in the znode */ 19567bd71c6Sperrin if (flag & (FSYNC | FDSYNC)) 19667bd71c6Sperrin atomic_inc_32(&zp->z_sync_cnt); 197da6c28aaSamw 198b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 199fa9e4066Sahrens return (0); 200fa9e4066Sahrens } 201fa9e4066Sahrens 202fa9e4066Sahrens /* ARGSUSED */ 203fa9e4066Sahrens static int 204da6c28aaSamw zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, 205da6c28aaSamw caller_context_t *ct) 206fa9e4066Sahrens { 20767bd71c6Sperrin znode_t *zp = VTOZ(vp); 208b614fdaaSMark Shellenbaum zfsvfs_t *zfsvfs = zp->z_zfsvfs; 209b614fdaaSMark Shellenbaum 210b614fdaaSMark Shellenbaum ZFS_ENTER(zfsvfs); 211b614fdaaSMark Shellenbaum ZFS_VERIFY_ZP(zp); 21267bd71c6Sperrin 21367bd71c6Sperrin /* Decrement the synchronous opens in the znode */ 214ecb72030Sperrin if ((flag & (FSYNC | FDSYNC)) && (count == 1)) 21567bd71c6Sperrin atomic_dec_32(&zp->z_sync_cnt); 21667bd71c6Sperrin 217fa9e4066Sahrens /* 218fa9e4066Sahrens * Clean up any locks held by this process on the vp. 219fa9e4066Sahrens */ 220fa9e4066Sahrens cleanlocks(vp, ddi_get_pid(), 0); 221fa9e4066Sahrens cleanshares(vp, ddi_get_pid()); 222fa9e4066Sahrens 223da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 224da6c28aaSamw ZTOV(zp)->v_type == VREG && 225da6c28aaSamw !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) && 226da6c28aaSamw zp->z_phys->zp_size > 0) 227da6c28aaSamw VERIFY(fs_vscan(vp, cr, 1) == 0); 228da6c28aaSamw 229b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 230fa9e4066Sahrens return (0); 231fa9e4066Sahrens } 232fa9e4066Sahrens 233fa9e4066Sahrens /* 234fa9e4066Sahrens * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 235fa9e4066Sahrens * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 236fa9e4066Sahrens */ 237fa9e4066Sahrens static int 238fa9e4066Sahrens zfs_holey(vnode_t *vp, int cmd, offset_t *off) 239fa9e4066Sahrens { 240fa9e4066Sahrens znode_t *zp = VTOZ(vp); 241fa9e4066Sahrens uint64_t noff = (uint64_t)*off; /* new offset */ 242fa9e4066Sahrens uint64_t file_sz; 243fa9e4066Sahrens int error; 244fa9e4066Sahrens boolean_t hole; 245fa9e4066Sahrens 246fa9e4066Sahrens file_sz = zp->z_phys->zp_size; 247fa9e4066Sahrens if (noff >= file_sz) { 248fa9e4066Sahrens return (ENXIO); 249fa9e4066Sahrens } 250fa9e4066Sahrens 251fa9e4066Sahrens if (cmd == _FIO_SEEK_HOLE) 252fa9e4066Sahrens hole = B_TRUE; 253fa9e4066Sahrens else 254fa9e4066Sahrens hole = B_FALSE; 255fa9e4066Sahrens 256fa9e4066Sahrens error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 257fa9e4066Sahrens 258fa9e4066Sahrens /* end of file? */ 259fa9e4066Sahrens if ((error == ESRCH) || (noff > file_sz)) { 260fa9e4066Sahrens /* 261fa9e4066Sahrens * Handle the virtual hole at the end of file. 262fa9e4066Sahrens */ 263fa9e4066Sahrens if (hole) { 264fa9e4066Sahrens *off = file_sz; 265fa9e4066Sahrens return (0); 266fa9e4066Sahrens } 267fa9e4066Sahrens return (ENXIO); 268fa9e4066Sahrens } 269fa9e4066Sahrens 270fa9e4066Sahrens if (noff < *off) 271fa9e4066Sahrens return (error); 272fa9e4066Sahrens *off = noff; 273fa9e4066Sahrens return (error); 274fa9e4066Sahrens } 275fa9e4066Sahrens 276fa9e4066Sahrens /* ARGSUSED */ 277fa9e4066Sahrens static int 278fa9e4066Sahrens zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred, 279da6c28aaSamw int *rvalp, caller_context_t *ct) 280fa9e4066Sahrens { 281fa9e4066Sahrens offset_t off; 282fa9e4066Sahrens int error; 283fa9e4066Sahrens zfsvfs_t *zfsvfs; 284f18faf3fSek znode_t *zp; 285fa9e4066Sahrens 286fa9e4066Sahrens switch (com) { 287ecb72030Sperrin case _FIOFFS: 288fa9e4066Sahrens return (zfs_sync(vp->v_vfsp, 0, cred)); 289fa9e4066Sahrens 290ea8dc4b6Seschrock /* 291ea8dc4b6Seschrock * The following two ioctls are used by bfu. Faking out, 292ea8dc4b6Seschrock * necessary to avoid bfu errors. 293ea8dc4b6Seschrock */ 294ecb72030Sperrin case _FIOGDIO: 295ecb72030Sperrin case _FIOSDIO: 296ea8dc4b6Seschrock return (0); 297ea8dc4b6Seschrock 298ecb72030Sperrin case _FIO_SEEK_DATA: 299ecb72030Sperrin case _FIO_SEEK_HOLE: 300fa9e4066Sahrens if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 301fa9e4066Sahrens return (EFAULT); 302fa9e4066Sahrens 303f18faf3fSek zp = VTOZ(vp); 304f18faf3fSek zfsvfs = zp->z_zfsvfs; 3053cb34c60Sahrens ZFS_ENTER(zfsvfs); 3063cb34c60Sahrens ZFS_VERIFY_ZP(zp); 307fa9e4066Sahrens 308fa9e4066Sahrens /* offset parameter is in/out */ 309fa9e4066Sahrens error = zfs_holey(vp, com, &off); 310fa9e4066Sahrens ZFS_EXIT(zfsvfs); 311fa9e4066Sahrens if (error) 312fa9e4066Sahrens return (error); 313fa9e4066Sahrens if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 314fa9e4066Sahrens return (EFAULT); 315fa9e4066Sahrens return (0); 316fa9e4066Sahrens } 317fa9e4066Sahrens return (ENOTTY); 318fa9e4066Sahrens } 319fa9e4066Sahrens 3200fab61baSJonathan W Adams /* 3210fab61baSJonathan W Adams * Utility functions to map and unmap a single physical page. These 3220fab61baSJonathan W Adams * are used to manage the mappable copies of ZFS file data, and therefore 3230fab61baSJonathan W Adams * do not update ref/mod bits. 3240fab61baSJonathan W Adams */ 3250fab61baSJonathan W Adams caddr_t 3260fab61baSJonathan W Adams zfs_map_page(page_t *pp, enum seg_rw rw) 3270fab61baSJonathan W Adams { 3280fab61baSJonathan W Adams if (kpm_enable) 3290fab61baSJonathan W Adams return (hat_kpm_mapin(pp, 0)); 3300fab61baSJonathan W Adams ASSERT(rw == S_READ || rw == S_WRITE); 3310fab61baSJonathan W Adams return (ppmapin(pp, PROT_READ | ((rw == S_WRITE) ? PROT_WRITE : 0), 3320fab61baSJonathan W Adams (caddr_t)-1)); 3330fab61baSJonathan W Adams } 3340fab61baSJonathan W Adams 3350fab61baSJonathan W Adams void 3360fab61baSJonathan W Adams zfs_unmap_page(page_t *pp, caddr_t addr) 3370fab61baSJonathan W Adams { 3380fab61baSJonathan W Adams if (kpm_enable) { 3390fab61baSJonathan W Adams hat_kpm_mapout(pp, 0, addr); 3400fab61baSJonathan W Adams } else { 3410fab61baSJonathan W Adams ppmapout(addr); 3420fab61baSJonathan W Adams } 3430fab61baSJonathan W Adams } 3440fab61baSJonathan W Adams 345fa9e4066Sahrens /* 346fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 347fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 348fa9e4066Sahrens * 349fa9e4066Sahrens * On Write: If we find a memory mapped page, we write to *both* 350fa9e4066Sahrens * the page and the dmu buffer. 351fa9e4066Sahrens * 352fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 353fa9e4066Sahrens * the file is memory mapped. 354fa9e4066Sahrens */ 355fa9e4066Sahrens static int 356feb08c6bSbillm mappedwrite(vnode_t *vp, int nbytes, uio_t *uio, dmu_tx_t *tx) 357fa9e4066Sahrens { 358fa9e4066Sahrens znode_t *zp = VTOZ(vp); 359fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 360fa9e4066Sahrens int64_t start, off; 361fa9e4066Sahrens int len = nbytes; 362fa9e4066Sahrens int error = 0; 363fa9e4066Sahrens 364fa9e4066Sahrens start = uio->uio_loffset; 365fa9e4066Sahrens off = start & PAGEOFFSET; 366fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 367fa9e4066Sahrens page_t *pp; 368fa9e4066Sahrens uint64_t bytes = MIN(PAGESIZE - off, len); 369feb08c6bSbillm uint64_t woff = uio->uio_loffset; 370fa9e4066Sahrens 371fa9e4066Sahrens /* 372fa9e4066Sahrens * We don't want a new page to "appear" in the middle of 373fa9e4066Sahrens * the file update (because it may not get the write 374fa9e4066Sahrens * update data), so we grab a lock to block 375fa9e4066Sahrens * zfs_getpage(). 376fa9e4066Sahrens */ 377fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 378fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 379fa9e4066Sahrens caddr_t va; 380fa9e4066Sahrens 381fa9e4066Sahrens rw_exit(&zp->z_map_lock); 3820fab61baSJonathan W Adams va = zfs_map_page(pp, S_WRITE); 383fa9e4066Sahrens error = uiomove(va+off, bytes, UIO_WRITE, uio); 384fa9e4066Sahrens if (error == 0) { 385fa9e4066Sahrens dmu_write(zfsvfs->z_os, zp->z_id, 386fa9e4066Sahrens woff, bytes, va+off, tx); 387fa9e4066Sahrens } 3880fab61baSJonathan W Adams zfs_unmap_page(pp, va); 389fa9e4066Sahrens page_unlock(pp); 390fa9e4066Sahrens } else { 391fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 392feb08c6bSbillm uio, bytes, tx); 393fa9e4066Sahrens rw_exit(&zp->z_map_lock); 394fa9e4066Sahrens } 395fa9e4066Sahrens len -= bytes; 396fa9e4066Sahrens off = 0; 397fa9e4066Sahrens if (error) 398fa9e4066Sahrens break; 399fa9e4066Sahrens } 400fa9e4066Sahrens return (error); 401fa9e4066Sahrens } 402fa9e4066Sahrens 403fa9e4066Sahrens /* 404fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 405fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 406fa9e4066Sahrens * 407fa9e4066Sahrens * On Read: We "read" preferentially from memory mapped pages, 408fa9e4066Sahrens * else we default from the dmu buffer. 409fa9e4066Sahrens * 410fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 411fa9e4066Sahrens * the file is memory mapped. 412fa9e4066Sahrens */ 413fa9e4066Sahrens static int 414feb08c6bSbillm mappedread(vnode_t *vp, int nbytes, uio_t *uio) 415fa9e4066Sahrens { 416feb08c6bSbillm znode_t *zp = VTOZ(vp); 417feb08c6bSbillm objset_t *os = zp->z_zfsvfs->z_os; 418feb08c6bSbillm int64_t start, off; 419fa9e4066Sahrens int len = nbytes; 420fa9e4066Sahrens int error = 0; 421fa9e4066Sahrens 422fa9e4066Sahrens start = uio->uio_loffset; 423fa9e4066Sahrens off = start & PAGEOFFSET; 424fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 425fa9e4066Sahrens page_t *pp; 426feb08c6bSbillm uint64_t bytes = MIN(PAGESIZE - off, len); 427fa9e4066Sahrens 428fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 429fa9e4066Sahrens caddr_t va; 430fa9e4066Sahrens 4310fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 432fa9e4066Sahrens error = uiomove(va + off, bytes, UIO_READ, uio); 4330fab61baSJonathan W Adams zfs_unmap_page(pp, va); 434fa9e4066Sahrens page_unlock(pp); 435fa9e4066Sahrens } else { 436feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, bytes); 437fa9e4066Sahrens } 438fa9e4066Sahrens len -= bytes; 439fa9e4066Sahrens off = 0; 440fa9e4066Sahrens if (error) 441fa9e4066Sahrens break; 442fa9e4066Sahrens } 443fa9e4066Sahrens return (error); 444fa9e4066Sahrens } 445fa9e4066Sahrens 446feb08c6bSbillm offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 447fa9e4066Sahrens 448fa9e4066Sahrens /* 449fa9e4066Sahrens * Read bytes from specified file into supplied buffer. 450fa9e4066Sahrens * 451fa9e4066Sahrens * IN: vp - vnode of file to be read from. 452fa9e4066Sahrens * uio - structure supplying read location, range info, 453fa9e4066Sahrens * and return buffer. 454fa9e4066Sahrens * ioflag - SYNC flags; used to provide FRSYNC semantics. 455fa9e4066Sahrens * cr - credentials of caller. 456da6c28aaSamw * ct - caller context 457fa9e4066Sahrens * 458fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 459fa9e4066Sahrens * 460fa9e4066Sahrens * RETURN: 0 if success 461fa9e4066Sahrens * error code if failure 462fa9e4066Sahrens * 463fa9e4066Sahrens * Side Effects: 464fa9e4066Sahrens * vp - atime updated if byte count > 0 465fa9e4066Sahrens */ 466fa9e4066Sahrens /* ARGSUSED */ 467fa9e4066Sahrens static int 468fa9e4066Sahrens zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 469fa9e4066Sahrens { 470fa9e4066Sahrens znode_t *zp = VTOZ(vp); 471fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 472f18faf3fSek objset_t *os; 473feb08c6bSbillm ssize_t n, nbytes; 474feb08c6bSbillm int error; 475104e2ed7Sperrin rl_t *rl; 476fa9e4066Sahrens 4773cb34c60Sahrens ZFS_ENTER(zfsvfs); 4783cb34c60Sahrens ZFS_VERIFY_ZP(zp); 479f18faf3fSek os = zfsvfs->z_os; 480fa9e4066Sahrens 4810616c50eSmarks if (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) { 4820616c50eSmarks ZFS_EXIT(zfsvfs); 4830616c50eSmarks return (EACCES); 4840616c50eSmarks } 4850616c50eSmarks 486fa9e4066Sahrens /* 487fa9e4066Sahrens * Validate file offset 488fa9e4066Sahrens */ 489fa9e4066Sahrens if (uio->uio_loffset < (offset_t)0) { 490fa9e4066Sahrens ZFS_EXIT(zfsvfs); 491fa9e4066Sahrens return (EINVAL); 492fa9e4066Sahrens } 493fa9e4066Sahrens 494fa9e4066Sahrens /* 495fa9e4066Sahrens * Fasttrack empty reads 496fa9e4066Sahrens */ 497fa9e4066Sahrens if (uio->uio_resid == 0) { 498fa9e4066Sahrens ZFS_EXIT(zfsvfs); 499fa9e4066Sahrens return (0); 500fa9e4066Sahrens } 501fa9e4066Sahrens 502fa9e4066Sahrens /* 503104e2ed7Sperrin * Check for mandatory locks 504fa9e4066Sahrens */ 505fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode)) { 506fa9e4066Sahrens if (error = chklock(vp, FREAD, 507fa9e4066Sahrens uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 508fa9e4066Sahrens ZFS_EXIT(zfsvfs); 509fa9e4066Sahrens return (error); 510fa9e4066Sahrens } 511fa9e4066Sahrens } 512fa9e4066Sahrens 513fa9e4066Sahrens /* 514fa9e4066Sahrens * If we're in FRSYNC mode, sync out this znode before reading it. 515fa9e4066Sahrens */ 516b19a79ecSperrin if (ioflag & FRSYNC) 517b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 518fa9e4066Sahrens 519fa9e4066Sahrens /* 520104e2ed7Sperrin * Lock the range against changes. 521fa9e4066Sahrens */ 522104e2ed7Sperrin rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER); 523104e2ed7Sperrin 524fa9e4066Sahrens /* 525fa9e4066Sahrens * If we are reading past end-of-file we can skip 526fa9e4066Sahrens * to the end; but we might still need to set atime. 527fa9e4066Sahrens */ 528fa9e4066Sahrens if (uio->uio_loffset >= zp->z_phys->zp_size) { 529fa9e4066Sahrens error = 0; 530fa9e4066Sahrens goto out; 531fa9e4066Sahrens } 532fa9e4066Sahrens 533feb08c6bSbillm ASSERT(uio->uio_loffset < zp->z_phys->zp_size); 534feb08c6bSbillm n = MIN(uio->uio_resid, zp->z_phys->zp_size - uio->uio_loffset); 535feb08c6bSbillm 536feb08c6bSbillm while (n > 0) { 537feb08c6bSbillm nbytes = MIN(n, zfs_read_chunk_size - 538feb08c6bSbillm P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); 539fa9e4066Sahrens 540feb08c6bSbillm if (vn_has_cached_data(vp)) 541feb08c6bSbillm error = mappedread(vp, nbytes, uio); 542feb08c6bSbillm else 543feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, nbytes); 544b87f3af3Sperrin if (error) { 545b87f3af3Sperrin /* convert checksum errors into IO errors */ 546b87f3af3Sperrin if (error == ECKSUM) 547b87f3af3Sperrin error = EIO; 548feb08c6bSbillm break; 549b87f3af3Sperrin } 550fa9e4066Sahrens 551feb08c6bSbillm n -= nbytes; 552fa9e4066Sahrens } 553feb08c6bSbillm 554fa9e4066Sahrens out: 555c5c6ffa0Smaybee zfs_range_unlock(rl); 556fa9e4066Sahrens 557fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 558fa9e4066Sahrens ZFS_EXIT(zfsvfs); 559fa9e4066Sahrens return (error); 560fa9e4066Sahrens } 561fa9e4066Sahrens 562fa9e4066Sahrens /* 563fa9e4066Sahrens * Fault in the pages of the first n bytes specified by the uio structure. 564fa9e4066Sahrens * 1 byte in each page is touched and the uio struct is unmodified. 565fa9e4066Sahrens * Any error will exit this routine as this is only a best 566fa9e4066Sahrens * attempt to get the pages resident. This is a copy of ufs_trans_touch(). 567fa9e4066Sahrens */ 568fa9e4066Sahrens static void 569fa9e4066Sahrens zfs_prefault_write(ssize_t n, struct uio *uio) 570fa9e4066Sahrens { 571fa9e4066Sahrens struct iovec *iov; 572fa9e4066Sahrens ulong_t cnt, incr; 573fa9e4066Sahrens caddr_t p; 574fa9e4066Sahrens uint8_t tmp; 575fa9e4066Sahrens 576fa9e4066Sahrens iov = uio->uio_iov; 577fa9e4066Sahrens 578fa9e4066Sahrens while (n) { 579fa9e4066Sahrens cnt = MIN(iov->iov_len, n); 580fa9e4066Sahrens if (cnt == 0) { 581fa9e4066Sahrens /* empty iov entry */ 582fa9e4066Sahrens iov++; 583fa9e4066Sahrens continue; 584fa9e4066Sahrens } 585fa9e4066Sahrens n -= cnt; 586fa9e4066Sahrens /* 587fa9e4066Sahrens * touch each page in this segment. 588fa9e4066Sahrens */ 589fa9e4066Sahrens p = iov->iov_base; 590fa9e4066Sahrens while (cnt) { 591fa9e4066Sahrens switch (uio->uio_segflg) { 592fa9e4066Sahrens case UIO_USERSPACE: 593fa9e4066Sahrens case UIO_USERISPACE: 594fa9e4066Sahrens if (fuword8(p, &tmp)) 595fa9e4066Sahrens return; 596fa9e4066Sahrens break; 597fa9e4066Sahrens case UIO_SYSSPACE: 598fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 599fa9e4066Sahrens return; 600fa9e4066Sahrens break; 601fa9e4066Sahrens } 602fa9e4066Sahrens incr = MIN(cnt, PAGESIZE); 603fa9e4066Sahrens p += incr; 604fa9e4066Sahrens cnt -= incr; 605fa9e4066Sahrens } 606fa9e4066Sahrens /* 607fa9e4066Sahrens * touch the last byte in case it straddles a page. 608fa9e4066Sahrens */ 609fa9e4066Sahrens p--; 610fa9e4066Sahrens switch (uio->uio_segflg) { 611fa9e4066Sahrens case UIO_USERSPACE: 612fa9e4066Sahrens case UIO_USERISPACE: 613fa9e4066Sahrens if (fuword8(p, &tmp)) 614fa9e4066Sahrens return; 615fa9e4066Sahrens break; 616fa9e4066Sahrens case UIO_SYSSPACE: 617fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 618fa9e4066Sahrens return; 619fa9e4066Sahrens break; 620fa9e4066Sahrens } 621fa9e4066Sahrens iov++; 622fa9e4066Sahrens } 623fa9e4066Sahrens } 624fa9e4066Sahrens 625fa9e4066Sahrens /* 626fa9e4066Sahrens * Write the bytes to a file. 627fa9e4066Sahrens * 628fa9e4066Sahrens * IN: vp - vnode of file to be written to. 629fa9e4066Sahrens * uio - structure supplying write location, range info, 630fa9e4066Sahrens * and data buffer. 631fa9e4066Sahrens * ioflag - FAPPEND flag set if in append mode. 632fa9e4066Sahrens * cr - credentials of caller. 633da6c28aaSamw * ct - caller context (NFS/CIFS fem monitor only) 634fa9e4066Sahrens * 635fa9e4066Sahrens * OUT: uio - updated offset and range. 636fa9e4066Sahrens * 637fa9e4066Sahrens * RETURN: 0 if success 638fa9e4066Sahrens * error code if failure 639fa9e4066Sahrens * 640fa9e4066Sahrens * Timestamps: 641fa9e4066Sahrens * vp - ctime|mtime updated if byte count > 0 642fa9e4066Sahrens */ 643fa9e4066Sahrens /* ARGSUSED */ 644fa9e4066Sahrens static int 645fa9e4066Sahrens zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 646fa9e4066Sahrens { 647fa9e4066Sahrens znode_t *zp = VTOZ(vp); 648fa9e4066Sahrens rlim64_t limit = uio->uio_llimit; 649fa9e4066Sahrens ssize_t start_resid = uio->uio_resid; 650fa9e4066Sahrens ssize_t tx_bytes; 651fa9e4066Sahrens uint64_t end_size; 652fa9e4066Sahrens dmu_tx_t *tx; 653fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 654f18faf3fSek zilog_t *zilog; 655fa9e4066Sahrens offset_t woff; 656fa9e4066Sahrens ssize_t n, nbytes; 657104e2ed7Sperrin rl_t *rl; 658fa9e4066Sahrens int max_blksz = zfsvfs->z_max_blksz; 659c09193bfSmarks uint64_t pflags; 660104e2ed7Sperrin int error; 661fa9e4066Sahrens 662fa9e4066Sahrens /* 663fa9e4066Sahrens * Fasttrack empty write 664fa9e4066Sahrens */ 665104e2ed7Sperrin n = start_resid; 666fa9e4066Sahrens if (n == 0) 667fa9e4066Sahrens return (0); 668fa9e4066Sahrens 669104e2ed7Sperrin if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 670104e2ed7Sperrin limit = MAXOFFSET_T; 671104e2ed7Sperrin 6723cb34c60Sahrens ZFS_ENTER(zfsvfs); 6733cb34c60Sahrens ZFS_VERIFY_ZP(zp); 674c09193bfSmarks 675c09193bfSmarks /* 676c09193bfSmarks * If immutable or not appending then return EPERM 677c09193bfSmarks */ 678c09193bfSmarks pflags = zp->z_phys->zp_flags; 679c09193bfSmarks if ((pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) || 680c09193bfSmarks ((pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) && 681c09193bfSmarks (uio->uio_loffset < zp->z_phys->zp_size))) { 682c09193bfSmarks ZFS_EXIT(zfsvfs); 683c09193bfSmarks return (EPERM); 684c09193bfSmarks } 685c09193bfSmarks 686f18faf3fSek zilog = zfsvfs->z_log; 687fa9e4066Sahrens 688fa9e4066Sahrens /* 689c5c6ffa0Smaybee * Pre-fault the pages to ensure slow (eg NFS) pages 690104e2ed7Sperrin * don't hold up txg. 691fa9e4066Sahrens */ 692c5c6ffa0Smaybee zfs_prefault_write(n, uio); 693fa9e4066Sahrens 694fa9e4066Sahrens /* 695fa9e4066Sahrens * If in append mode, set the io offset pointer to eof. 696fa9e4066Sahrens */ 697104e2ed7Sperrin if (ioflag & FAPPEND) { 698104e2ed7Sperrin /* 699104e2ed7Sperrin * Range lock for a file append: 700104e2ed7Sperrin * The value for the start of range will be determined by 701104e2ed7Sperrin * zfs_range_lock() (to guarantee append semantics). 702104e2ed7Sperrin * If this write will cause the block size to increase, 703104e2ed7Sperrin * zfs_range_lock() will lock the entire file, so we must 704104e2ed7Sperrin * later reduce the range after we grow the block size. 705104e2ed7Sperrin */ 706104e2ed7Sperrin rl = zfs_range_lock(zp, 0, n, RL_APPEND); 707104e2ed7Sperrin if (rl->r_len == UINT64_MAX) { 708104e2ed7Sperrin /* overlocked, zp_size can't change */ 709104e2ed7Sperrin woff = uio->uio_loffset = zp->z_phys->zp_size; 710104e2ed7Sperrin } else { 711104e2ed7Sperrin woff = uio->uio_loffset = rl->r_off; 712104e2ed7Sperrin } 713fa9e4066Sahrens } else { 714fa9e4066Sahrens woff = uio->uio_loffset; 715fa9e4066Sahrens /* 716fa9e4066Sahrens * Validate file offset 717fa9e4066Sahrens */ 718fa9e4066Sahrens if (woff < 0) { 719fa9e4066Sahrens ZFS_EXIT(zfsvfs); 720fa9e4066Sahrens return (EINVAL); 721fa9e4066Sahrens } 722fa9e4066Sahrens 723fa9e4066Sahrens /* 724104e2ed7Sperrin * If we need to grow the block size then zfs_range_lock() 725104e2ed7Sperrin * will lock a wider range than we request here. 726104e2ed7Sperrin * Later after growing the block size we reduce the range. 727fa9e4066Sahrens */ 728104e2ed7Sperrin rl = zfs_range_lock(zp, woff, n, RL_WRITER); 729fa9e4066Sahrens } 730fa9e4066Sahrens 731fa9e4066Sahrens if (woff >= limit) { 732feb08c6bSbillm zfs_range_unlock(rl); 733feb08c6bSbillm ZFS_EXIT(zfsvfs); 734feb08c6bSbillm return (EFBIG); 735fa9e4066Sahrens } 736fa9e4066Sahrens 737fa9e4066Sahrens if ((woff + n) > limit || woff > (limit - n)) 738fa9e4066Sahrens n = limit - woff; 739fa9e4066Sahrens 740fa9e4066Sahrens /* 741104e2ed7Sperrin * Check for mandatory locks 742fa9e4066Sahrens */ 743fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode) && 744feb08c6bSbillm (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 745feb08c6bSbillm zfs_range_unlock(rl); 746feb08c6bSbillm ZFS_EXIT(zfsvfs); 747feb08c6bSbillm return (error); 748fa9e4066Sahrens } 749feb08c6bSbillm end_size = MAX(zp->z_phys->zp_size, woff + n); 750fa9e4066Sahrens 751104e2ed7Sperrin /* 752feb08c6bSbillm * Write the file in reasonable size chunks. Each chunk is written 753feb08c6bSbillm * in a separate transaction; this keeps the intent log records small 754feb08c6bSbillm * and allows us to do more fine-grained space accounting. 755104e2ed7Sperrin */ 756feb08c6bSbillm while (n > 0) { 757feb08c6bSbillm /* 758feb08c6bSbillm * Start a transaction. 759feb08c6bSbillm */ 760feb08c6bSbillm woff = uio->uio_loffset; 761feb08c6bSbillm tx = dmu_tx_create(zfsvfs->z_os); 762feb08c6bSbillm dmu_tx_hold_bonus(tx, zp->z_id); 763feb08c6bSbillm dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 764feb08c6bSbillm error = dmu_tx_assign(tx, zfsvfs->z_assign); 765feb08c6bSbillm if (error) { 766feb08c6bSbillm if (error == ERESTART && 767feb08c6bSbillm zfsvfs->z_assign == TXG_NOWAIT) { 768feb08c6bSbillm dmu_tx_wait(tx); 769feb08c6bSbillm dmu_tx_abort(tx); 770feb08c6bSbillm continue; 771feb08c6bSbillm } 772feb08c6bSbillm dmu_tx_abort(tx); 773feb08c6bSbillm break; 774feb08c6bSbillm } 775104e2ed7Sperrin 776feb08c6bSbillm /* 777feb08c6bSbillm * If zfs_range_lock() over-locked we grow the blocksize 778feb08c6bSbillm * and then reduce the lock range. This will only happen 779feb08c6bSbillm * on the first iteration since zfs_range_reduce() will 780feb08c6bSbillm * shrink down r_len to the appropriate size. 781feb08c6bSbillm */ 782feb08c6bSbillm if (rl->r_len == UINT64_MAX) { 783feb08c6bSbillm uint64_t new_blksz; 784feb08c6bSbillm 785feb08c6bSbillm if (zp->z_blksz > max_blksz) { 786feb08c6bSbillm ASSERT(!ISP2(zp->z_blksz)); 787feb08c6bSbillm new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 788feb08c6bSbillm } else { 789feb08c6bSbillm new_blksz = MIN(end_size, max_blksz); 790feb08c6bSbillm } 791feb08c6bSbillm zfs_grow_blocksize(zp, new_blksz, tx); 792feb08c6bSbillm zfs_range_reduce(rl, woff, n); 793fa9e4066Sahrens } 794fa9e4066Sahrens 795fa9e4066Sahrens /* 796fa9e4066Sahrens * XXX - should we really limit each write to z_max_blksz? 797fa9e4066Sahrens * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 798fa9e4066Sahrens */ 799fa9e4066Sahrens nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 800fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_READER); 801fa9e4066Sahrens 802fa9e4066Sahrens tx_bytes = uio->uio_resid; 803fa9e4066Sahrens if (vn_has_cached_data(vp)) { 804fa9e4066Sahrens rw_exit(&zp->z_map_lock); 805feb08c6bSbillm error = mappedwrite(vp, nbytes, uio, tx); 806fa9e4066Sahrens } else { 807fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 808feb08c6bSbillm uio, nbytes, tx); 809fa9e4066Sahrens rw_exit(&zp->z_map_lock); 810fa9e4066Sahrens } 811fa9e4066Sahrens tx_bytes -= uio->uio_resid; 812fa9e4066Sahrens 813feb08c6bSbillm /* 814feb08c6bSbillm * If we made no progress, we're done. If we made even 815feb08c6bSbillm * partial progress, update the znode and ZIL accordingly. 816feb08c6bSbillm */ 817feb08c6bSbillm if (tx_bytes == 0) { 818af2c4821Smaybee dmu_tx_commit(tx); 819feb08c6bSbillm ASSERT(error != 0); 820fa9e4066Sahrens break; 821fa9e4066Sahrens } 822fa9e4066Sahrens 823169cdae2Smarks /* 824169cdae2Smarks * Clear Set-UID/Set-GID bits on successful write if not 825169cdae2Smarks * privileged and at least one of the excute bits is set. 826169cdae2Smarks * 827169cdae2Smarks * It would be nice to to this after all writes have 828169cdae2Smarks * been done, but that would still expose the ISUID/ISGID 829169cdae2Smarks * to another app after the partial write is committed. 830da6c28aaSamw * 831da6c28aaSamw * Note: we don't call zfs_fuid_map_id() here because 832da6c28aaSamw * user 0 is not an ephemeral uid. 833169cdae2Smarks */ 834169cdae2Smarks mutex_enter(&zp->z_acl_lock); 835169cdae2Smarks if ((zp->z_phys->zp_mode & (S_IXUSR | (S_IXUSR >> 3) | 836169cdae2Smarks (S_IXUSR >> 6))) != 0 && 837169cdae2Smarks (zp->z_phys->zp_mode & (S_ISUID | S_ISGID)) != 0 && 838169cdae2Smarks secpolicy_vnode_setid_retain(cr, 839169cdae2Smarks (zp->z_phys->zp_mode & S_ISUID) != 0 && 840169cdae2Smarks zp->z_phys->zp_uid == 0) != 0) { 841ecb72030Sperrin zp->z_phys->zp_mode &= ~(S_ISUID | S_ISGID); 842169cdae2Smarks } 843169cdae2Smarks mutex_exit(&zp->z_acl_lock); 844169cdae2Smarks 845fa9e4066Sahrens /* 846feb08c6bSbillm * Update time stamp. NOTE: This marks the bonus buffer as 847feb08c6bSbillm * dirty, so we don't have to do it again for zp_size. 848fa9e4066Sahrens */ 849fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 850fa9e4066Sahrens 851fa9e4066Sahrens /* 852feb08c6bSbillm * Update the file size (zp_size) if it has changed; 853feb08c6bSbillm * account for possible concurrent updates. 854fa9e4066Sahrens */ 855feb08c6bSbillm while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) 856fa9e4066Sahrens (void) atomic_cas_64(&zp->z_phys->zp_size, end_size, 857fa9e4066Sahrens uio->uio_loffset); 858feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 859feb08c6bSbillm dmu_tx_commit(tx); 860fa9e4066Sahrens 861feb08c6bSbillm if (error != 0) 862feb08c6bSbillm break; 863feb08c6bSbillm ASSERT(tx_bytes == nbytes); 864feb08c6bSbillm n -= nbytes; 865feb08c6bSbillm } 866fa9e4066Sahrens 867c5c6ffa0Smaybee zfs_range_unlock(rl); 868fa9e4066Sahrens 869fa9e4066Sahrens /* 870fa9e4066Sahrens * If we're in replay mode, or we made no progress, return error. 871fa9e4066Sahrens * Otherwise, it's at least a partial write, so it's successful. 872fa9e4066Sahrens */ 873fa9e4066Sahrens if (zfsvfs->z_assign >= TXG_INITIAL || uio->uio_resid == start_resid) { 874fa9e4066Sahrens ZFS_EXIT(zfsvfs); 875fa9e4066Sahrens return (error); 876fa9e4066Sahrens } 877fa9e4066Sahrens 878b19a79ecSperrin if (ioflag & (FSYNC | FDSYNC)) 879b19a79ecSperrin zil_commit(zilog, zp->z_last_itx, zp->z_id); 880fa9e4066Sahrens 881fa9e4066Sahrens ZFS_EXIT(zfsvfs); 882fa9e4066Sahrens return (0); 883fa9e4066Sahrens } 884fa9e4066Sahrens 885c5c6ffa0Smaybee void 88667bd71c6Sperrin zfs_get_done(dmu_buf_t *db, void *vzgd) 887c5c6ffa0Smaybee { 88867bd71c6Sperrin zgd_t *zgd = (zgd_t *)vzgd; 88967bd71c6Sperrin rl_t *rl = zgd->zgd_rl; 890c5c6ffa0Smaybee vnode_t *vp = ZTOV(rl->r_zp); 891c5c6ffa0Smaybee 89267bd71c6Sperrin dmu_buf_rele(db, vzgd); 893c5c6ffa0Smaybee zfs_range_unlock(rl); 894c5c6ffa0Smaybee VN_RELE(vp); 89517f17c2dSbonwick zil_add_block(zgd->zgd_zilog, zgd->zgd_bp); 89667bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 897c5c6ffa0Smaybee } 898c5c6ffa0Smaybee 899fa9e4066Sahrens /* 900fa9e4066Sahrens * Get data to generate a TX_WRITE intent log record. 901fa9e4066Sahrens */ 902fa9e4066Sahrens int 903c5c6ffa0Smaybee zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) 904fa9e4066Sahrens { 905fa9e4066Sahrens zfsvfs_t *zfsvfs = arg; 906fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 907fa9e4066Sahrens znode_t *zp; 908fa9e4066Sahrens uint64_t off = lr->lr_offset; 909c5c6ffa0Smaybee dmu_buf_t *db; 910104e2ed7Sperrin rl_t *rl; 91167bd71c6Sperrin zgd_t *zgd; 912feb08c6bSbillm int dlen = lr->lr_length; /* length of user data */ 913fa9e4066Sahrens int error = 0; 914fa9e4066Sahrens 91567bd71c6Sperrin ASSERT(zio); 916fa9e4066Sahrens ASSERT(dlen != 0); 917fa9e4066Sahrens 918fa9e4066Sahrens /* 919104e2ed7Sperrin * Nothing to do if the file has been removed 920fa9e4066Sahrens */ 921fa9e4066Sahrens if (zfs_zget(zfsvfs, lr->lr_foid, &zp) != 0) 922fa9e4066Sahrens return (ENOENT); 923893a6d32Sahrens if (zp->z_unlinked) { 924fa9e4066Sahrens VN_RELE(ZTOV(zp)); 925fa9e4066Sahrens return (ENOENT); 926fa9e4066Sahrens } 927fa9e4066Sahrens 928fa9e4066Sahrens /* 929fa9e4066Sahrens * Write records come in two flavors: immediate and indirect. 930fa9e4066Sahrens * For small writes it's cheaper to store the data with the 931fa9e4066Sahrens * log record (immediate); for large writes it's cheaper to 932fa9e4066Sahrens * sync the data and get a pointer to it (indirect) so that 933fa9e4066Sahrens * we don't have to write the data twice. 934fa9e4066Sahrens */ 935104e2ed7Sperrin if (buf != NULL) { /* immediate write */ 936104e2ed7Sperrin rl = zfs_range_lock(zp, off, dlen, RL_READER); 937104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 938104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 939104e2ed7Sperrin error = ENOENT; 940104e2ed7Sperrin goto out; 941104e2ed7Sperrin } 94210d957caSmaybee VERIFY(0 == dmu_read(os, lr->lr_foid, off, dlen, buf)); 943104e2ed7Sperrin } else { /* indirect write */ 944104e2ed7Sperrin uint64_t boff; /* block starting offset */ 945104e2ed7Sperrin 946fa9e4066Sahrens /* 947104e2ed7Sperrin * Have to lock the whole block to ensure when it's 948104e2ed7Sperrin * written out and it's checksum is being calculated 949104e2ed7Sperrin * that no one can change the data. We need to re-check 950104e2ed7Sperrin * blocksize after we get the lock in case it's changed! 951fa9e4066Sahrens */ 952104e2ed7Sperrin for (;;) { 9535263255cSperrin if (ISP2(zp->z_blksz)) { 9545263255cSperrin boff = P2ALIGN_TYPED(off, zp->z_blksz, 9555263255cSperrin uint64_t); 9565263255cSperrin } else { 9575263255cSperrin boff = 0; 9585263255cSperrin } 959104e2ed7Sperrin dlen = zp->z_blksz; 960104e2ed7Sperrin rl = zfs_range_lock(zp, boff, dlen, RL_READER); 961104e2ed7Sperrin if (zp->z_blksz == dlen) 962104e2ed7Sperrin break; 963c5c6ffa0Smaybee zfs_range_unlock(rl); 964104e2ed7Sperrin } 965104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 966104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 967104e2ed7Sperrin error = ENOENT; 968104e2ed7Sperrin goto out; 969104e2ed7Sperrin } 97067bd71c6Sperrin zgd = (zgd_t *)kmem_alloc(sizeof (zgd_t), KM_SLEEP); 97167bd71c6Sperrin zgd->zgd_rl = rl; 97267bd71c6Sperrin zgd->zgd_zilog = zfsvfs->z_log; 97367bd71c6Sperrin zgd->zgd_bp = &lr->lr_blkptr; 97467bd71c6Sperrin VERIFY(0 == dmu_buf_hold(os, lr->lr_foid, boff, zgd, &db)); 975c5c6ffa0Smaybee ASSERT(boff == db->db_offset); 976c5c6ffa0Smaybee lr->lr_blkoff = off - boff; 977c5c6ffa0Smaybee error = dmu_sync(zio, db, &lr->lr_blkptr, 97867bd71c6Sperrin lr->lr_common.lrc_txg, zfs_get_done, zgd); 979f4d2e9e6Smaybee ASSERT((error && error != EINPROGRESS) || 980f4d2e9e6Smaybee lr->lr_length <= zp->z_blksz); 98117f17c2dSbonwick if (error == 0) 98217f17c2dSbonwick zil_add_block(zfsvfs->z_log, &lr->lr_blkptr); 983c5c6ffa0Smaybee /* 984c5c6ffa0Smaybee * If we get EINPROGRESS, then we need to wait for a 985c5c6ffa0Smaybee * write IO initiated by dmu_sync() to complete before 986b19a79ecSperrin * we can release this dbuf. We will finish everything 987c5c6ffa0Smaybee * up in the zfs_get_done() callback. 988c5c6ffa0Smaybee */ 989c5c6ffa0Smaybee if (error == EINPROGRESS) 990c5c6ffa0Smaybee return (0); 99167bd71c6Sperrin dmu_buf_rele(db, zgd); 99267bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 993fa9e4066Sahrens } 994104e2ed7Sperrin out: 995c5c6ffa0Smaybee zfs_range_unlock(rl); 996fa9e4066Sahrens VN_RELE(ZTOV(zp)); 997fa9e4066Sahrens return (error); 998fa9e4066Sahrens } 999fa9e4066Sahrens 1000fa9e4066Sahrens /*ARGSUSED*/ 1001fa9e4066Sahrens static int 1002da6c28aaSamw zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr, 1003da6c28aaSamw caller_context_t *ct) 1004fa9e4066Sahrens { 1005fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1006fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1007fa9e4066Sahrens int error; 1008fa9e4066Sahrens 10093cb34c60Sahrens ZFS_ENTER(zfsvfs); 10103cb34c60Sahrens ZFS_VERIFY_ZP(zp); 1011da6c28aaSamw 1012da6c28aaSamw if (flag & V_ACE_MASK) 1013da6c28aaSamw error = zfs_zaccess(zp, mode, flag, B_FALSE, cr); 1014da6c28aaSamw else 1015da6c28aaSamw error = zfs_zaccess_rwx(zp, mode, flag, cr); 1016da6c28aaSamw 1017fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1018fa9e4066Sahrens return (error); 1019fa9e4066Sahrens } 1020fa9e4066Sahrens 1021fa9e4066Sahrens /* 1022fa9e4066Sahrens * Lookup an entry in a directory, or an extended attribute directory. 1023fa9e4066Sahrens * If it exists, return a held vnode reference for it. 1024fa9e4066Sahrens * 1025fa9e4066Sahrens * IN: dvp - vnode of directory to search. 1026fa9e4066Sahrens * nm - name of entry to lookup. 1027fa9e4066Sahrens * pnp - full pathname to lookup [UNUSED]. 1028fa9e4066Sahrens * flags - LOOKUP_XATTR set if looking for an attribute. 1029fa9e4066Sahrens * rdir - root directory vnode [UNUSED]. 1030fa9e4066Sahrens * cr - credentials of caller. 1031da6c28aaSamw * ct - caller context 1032da6c28aaSamw * direntflags - directory lookup flags 1033da6c28aaSamw * realpnp - returned pathname. 1034fa9e4066Sahrens * 1035fa9e4066Sahrens * OUT: vpp - vnode of located entry, NULL if not found. 1036fa9e4066Sahrens * 1037fa9e4066Sahrens * RETURN: 0 if success 1038fa9e4066Sahrens * error code if failure 1039fa9e4066Sahrens * 1040fa9e4066Sahrens * Timestamps: 1041fa9e4066Sahrens * NA 1042fa9e4066Sahrens */ 1043fa9e4066Sahrens /* ARGSUSED */ 1044fa9e4066Sahrens static int 1045fa9e4066Sahrens zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 1046da6c28aaSamw int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, 1047da6c28aaSamw int *direntflags, pathname_t *realpnp) 1048fa9e4066Sahrens { 1049fa9e4066Sahrens znode_t *zdp = VTOZ(dvp); 1050fa9e4066Sahrens zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 1051fa9e4066Sahrens int error; 1052fa9e4066Sahrens 10533cb34c60Sahrens ZFS_ENTER(zfsvfs); 10543cb34c60Sahrens ZFS_VERIFY_ZP(zdp); 1055fa9e4066Sahrens 1056fa9e4066Sahrens *vpp = NULL; 1057fa9e4066Sahrens 1058fa9e4066Sahrens if (flags & LOOKUP_XATTR) { 10597b55fa8eSck /* 10607b55fa8eSck * If the xattr property is off, refuse the lookup request. 10617b55fa8eSck */ 10627b55fa8eSck if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 10637b55fa8eSck ZFS_EXIT(zfsvfs); 10647b55fa8eSck return (EINVAL); 10657b55fa8eSck } 10667b55fa8eSck 1067fa9e4066Sahrens /* 1068fa9e4066Sahrens * We don't allow recursive attributes.. 1069fa9e4066Sahrens * Maybe someday we will. 1070fa9e4066Sahrens */ 1071fa9e4066Sahrens if (zdp->z_phys->zp_flags & ZFS_XATTR) { 1072fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1073fa9e4066Sahrens return (EINVAL); 1074fa9e4066Sahrens } 1075fa9e4066Sahrens 10763f063a9dSck if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 1077fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1078fa9e4066Sahrens return (error); 1079fa9e4066Sahrens } 1080fa9e4066Sahrens 1081fa9e4066Sahrens /* 1082fa9e4066Sahrens * Do we have permission to get into attribute directory? 1083fa9e4066Sahrens */ 1084fa9e4066Sahrens 1085da6c28aaSamw if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0, 1086da6c28aaSamw B_FALSE, cr)) { 1087fa9e4066Sahrens VN_RELE(*vpp); 1088da6c28aaSamw *vpp = NULL; 1089fa9e4066Sahrens } 1090fa9e4066Sahrens 1091fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1092fa9e4066Sahrens return (error); 1093fa9e4066Sahrens } 1094fa9e4066Sahrens 10950f2dc02eSek if (dvp->v_type != VDIR) { 10960f2dc02eSek ZFS_EXIT(zfsvfs); 1097736b9155Smarks return (ENOTDIR); 10980f2dc02eSek } 1099736b9155Smarks 1100fa9e4066Sahrens /* 1101fa9e4066Sahrens * Check accessibility of directory. 1102fa9e4066Sahrens */ 1103fa9e4066Sahrens 1104da6c28aaSamw if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) { 1105fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1106fa9e4066Sahrens return (error); 1107fa9e4066Sahrens } 1108fa9e4066Sahrens 1109de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), 1110da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1111da6c28aaSamw ZFS_EXIT(zfsvfs); 1112da6c28aaSamw return (EILSEQ); 1113da6c28aaSamw } 1114fa9e4066Sahrens 1115da6c28aaSamw error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp); 1116da6c28aaSamw if (error == 0) { 1117fa9e4066Sahrens /* 1118fa9e4066Sahrens * Convert device special files 1119fa9e4066Sahrens */ 1120fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1121fa9e4066Sahrens vnode_t *svp; 1122fa9e4066Sahrens 1123fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1124fa9e4066Sahrens VN_RELE(*vpp); 1125fa9e4066Sahrens if (svp == NULL) 1126fa9e4066Sahrens error = ENOSYS; 1127fa9e4066Sahrens else 1128fa9e4066Sahrens *vpp = svp; 1129fa9e4066Sahrens } 1130fa9e4066Sahrens } 1131fa9e4066Sahrens 1132fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1133fa9e4066Sahrens return (error); 1134fa9e4066Sahrens } 1135fa9e4066Sahrens 1136fa9e4066Sahrens /* 1137fa9e4066Sahrens * Attempt to create a new entry in a directory. If the entry 1138fa9e4066Sahrens * already exists, truncate the file if permissible, else return 1139fa9e4066Sahrens * an error. Return the vp of the created or trunc'd file. 1140fa9e4066Sahrens * 1141fa9e4066Sahrens * IN: dvp - vnode of directory to put new file entry in. 1142fa9e4066Sahrens * name - name of new file entry. 1143fa9e4066Sahrens * vap - attributes of new file. 1144fa9e4066Sahrens * excl - flag indicating exclusive or non-exclusive mode. 1145fa9e4066Sahrens * mode - mode to open file with. 1146fa9e4066Sahrens * cr - credentials of caller. 1147fa9e4066Sahrens * flag - large file flag [UNUSED]. 1148da6c28aaSamw * ct - caller context 1149da6c28aaSamw * vsecp - ACL to be set 1150fa9e4066Sahrens * 1151fa9e4066Sahrens * OUT: vpp - vnode of created or trunc'd entry. 1152fa9e4066Sahrens * 1153fa9e4066Sahrens * RETURN: 0 if success 1154fa9e4066Sahrens * error code if failure 1155fa9e4066Sahrens * 1156fa9e4066Sahrens * Timestamps: 1157fa9e4066Sahrens * dvp - ctime|mtime updated if new entry created 1158fa9e4066Sahrens * vp - ctime|mtime always, atime if new 1159fa9e4066Sahrens */ 1160da6c28aaSamw 1161fa9e4066Sahrens /* ARGSUSED */ 1162fa9e4066Sahrens static int 1163fa9e4066Sahrens zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, 1164da6c28aaSamw int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct, 1165da6c28aaSamw vsecattr_t *vsecp) 1166fa9e4066Sahrens { 1167fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1168fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1169f18faf3fSek zilog_t *zilog; 1170f18faf3fSek objset_t *os; 1171fa9e4066Sahrens zfs_dirlock_t *dl; 1172fa9e4066Sahrens dmu_tx_t *tx; 1173fa9e4066Sahrens int error; 1174da6c28aaSamw zfs_acl_t *aclp = NULL; 1175da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 1176*c1ce5987SMark Shellenbaum ksid_t *ksid; 1177*c1ce5987SMark Shellenbaum uid_t uid; 1178*c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 1179da6c28aaSamw 1180da6c28aaSamw /* 1181da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1182da6c28aaSamw * make sure file system is at proper version 1183da6c28aaSamw */ 1184da6c28aaSamw 1185*c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 1186*c1ce5987SMark Shellenbaum if (ksid) 1187*c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 1188*c1ce5987SMark Shellenbaum else 1189*c1ce5987SMark Shellenbaum uid = crgetuid(cr); 1190*c1ce5987SMark Shellenbaum 1191da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1192da6c28aaSamw (vsecp || (vap->va_mask & AT_XVATTR) || 1193*c1ce5987SMark Shellenbaum IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1194da6c28aaSamw return (EINVAL); 1195fa9e4066Sahrens 11963cb34c60Sahrens ZFS_ENTER(zfsvfs); 11973cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1198f18faf3fSek os = zfsvfs->z_os; 1199f18faf3fSek zilog = zfsvfs->z_log; 1200fa9e4066Sahrens 1201de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 1202da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1203da6c28aaSamw ZFS_EXIT(zfsvfs); 1204da6c28aaSamw return (EILSEQ); 1205da6c28aaSamw } 1206da6c28aaSamw 1207da6c28aaSamw if (vap->va_mask & AT_XVATTR) { 1208da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1209da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1210da6c28aaSamw ZFS_EXIT(zfsvfs); 1211da6c28aaSamw return (error); 1212da6c28aaSamw } 1213da6c28aaSamw } 1214fa9e4066Sahrens top: 1215fa9e4066Sahrens *vpp = NULL; 1216fa9e4066Sahrens 1217fa9e4066Sahrens if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) 1218fa9e4066Sahrens vap->va_mode &= ~VSVTX; 1219fa9e4066Sahrens 1220fa9e4066Sahrens if (*name == '\0') { 1221fa9e4066Sahrens /* 1222fa9e4066Sahrens * Null component name refers to the directory itself. 1223fa9e4066Sahrens */ 1224fa9e4066Sahrens VN_HOLD(dvp); 1225fa9e4066Sahrens zp = dzp; 1226fa9e4066Sahrens dl = NULL; 1227fa9e4066Sahrens error = 0; 1228fa9e4066Sahrens } else { 1229fa9e4066Sahrens /* possible VN_HOLD(zp) */ 1230da6c28aaSamw int zflg = 0; 1231da6c28aaSamw 1232da6c28aaSamw if (flag & FIGNORECASE) 1233da6c28aaSamw zflg |= ZCILOOK; 1234da6c28aaSamw 1235da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1236da6c28aaSamw NULL, NULL); 1237da6c28aaSamw if (error) { 1238fa9e4066Sahrens if (strcmp(name, "..") == 0) 1239fa9e4066Sahrens error = EISDIR; 1240fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1241da6c28aaSamw if (aclp) 1242da6c28aaSamw zfs_acl_free(aclp); 1243da6c28aaSamw return (error); 1244da6c28aaSamw } 1245da6c28aaSamw } 1246da6c28aaSamw if (vsecp && aclp == NULL) { 1247da6c28aaSamw error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, &aclp); 1248da6c28aaSamw if (error) { 1249da6c28aaSamw ZFS_EXIT(zfsvfs); 1250da6c28aaSamw if (dl) 1251da6c28aaSamw zfs_dirent_unlock(dl); 1252fa9e4066Sahrens return (error); 1253fa9e4066Sahrens } 1254fa9e4066Sahrens } 1255fa9e4066Sahrens 1256fa9e4066Sahrens if (zp == NULL) { 1257da6c28aaSamw uint64_t txtype; 1258da6c28aaSamw 1259fa9e4066Sahrens /* 1260fa9e4066Sahrens * Create a new file object and update the directory 1261fa9e4066Sahrens * to reference it. 1262fa9e4066Sahrens */ 1263da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 1264fa9e4066Sahrens goto out; 1265fa9e4066Sahrens } 1266fa9e4066Sahrens 1267fa9e4066Sahrens /* 1268fa9e4066Sahrens * We only support the creation of regular files in 1269fa9e4066Sahrens * extended attribute directories. 1270fa9e4066Sahrens */ 1271fa9e4066Sahrens if ((dzp->z_phys->zp_flags & ZFS_XATTR) && 1272fa9e4066Sahrens (vap->va_type != VREG)) { 1273fa9e4066Sahrens error = EINVAL; 1274fa9e4066Sahrens goto out; 1275fa9e4066Sahrens } 1276fa9e4066Sahrens 1277fa9e4066Sahrens tx = dmu_tx_create(os); 1278fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 1279*c1ce5987SMark Shellenbaum if ((aclp && aclp->z_has_fuids) || IS_EPHEMERAL(uid) || 1280*c1ce5987SMark Shellenbaum IS_EPHEMERAL(gid)) { 12814c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 12824c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 12834c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 12844c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 12854c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, 12864c841f60Smarks FALSE, NULL); 12874c841f60Smarks } else { 12884c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 12894c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 12904c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 12914c841f60Smarks } 1292da6c28aaSamw } 1293fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 1294ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 1295da6c28aaSamw if ((dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) || aclp) { 1296fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1297fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1298da6c28aaSamw } 1299fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1300fa9e4066Sahrens if (error) { 1301fa9e4066Sahrens zfs_dirent_unlock(dl); 1302fa9e4066Sahrens if (error == ERESTART && 1303fa9e4066Sahrens zfsvfs->z_assign == TXG_NOWAIT) { 13048a2f1b91Sahrens dmu_tx_wait(tx); 13058a2f1b91Sahrens dmu_tx_abort(tx); 1306fa9e4066Sahrens goto top; 1307fa9e4066Sahrens } 13088a2f1b91Sahrens dmu_tx_abort(tx); 1309fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1310da6c28aaSamw if (aclp) 1311da6c28aaSamw zfs_acl_free(aclp); 1312fa9e4066Sahrens return (error); 1313fa9e4066Sahrens } 13144ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, aclp, &fuidp); 1315fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1316da6c28aaSamw txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); 1317da6c28aaSamw if (flag & FIGNORECASE) 1318da6c28aaSamw txtype |= TX_CI; 1319da6c28aaSamw zfs_log_create(zilog, tx, txtype, dzp, zp, name, 1320da6c28aaSamw vsecp, fuidp, vap); 1321da6c28aaSamw if (fuidp) 1322da6c28aaSamw zfs_fuid_info_free(fuidp); 1323fa9e4066Sahrens dmu_tx_commit(tx); 1324fa9e4066Sahrens } else { 1325da6c28aaSamw int aflags = (flag & FAPPEND) ? V_APPEND : 0; 1326da6c28aaSamw 1327fa9e4066Sahrens /* 1328fa9e4066Sahrens * A directory entry already exists for this name. 1329fa9e4066Sahrens */ 1330fa9e4066Sahrens /* 1331fa9e4066Sahrens * Can't truncate an existing file if in exclusive mode. 1332fa9e4066Sahrens */ 1333fa9e4066Sahrens if (excl == EXCL) { 1334fa9e4066Sahrens error = EEXIST; 1335fa9e4066Sahrens goto out; 1336fa9e4066Sahrens } 1337fa9e4066Sahrens /* 1338fa9e4066Sahrens * Can't open a directory for writing. 1339fa9e4066Sahrens */ 1340fa9e4066Sahrens if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1341fa9e4066Sahrens error = EISDIR; 1342fa9e4066Sahrens goto out; 1343fa9e4066Sahrens } 1344fa9e4066Sahrens /* 1345fa9e4066Sahrens * Verify requested access to file. 1346fa9e4066Sahrens */ 1347da6c28aaSamw if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) { 1348fa9e4066Sahrens goto out; 1349fa9e4066Sahrens } 1350fa9e4066Sahrens 1351fa9e4066Sahrens mutex_enter(&dzp->z_lock); 1352fa9e4066Sahrens dzp->z_seq++; 1353fa9e4066Sahrens mutex_exit(&dzp->z_lock); 1354fa9e4066Sahrens 13555730cc9aSmaybee /* 13565730cc9aSmaybee * Truncate regular files if requested. 13575730cc9aSmaybee */ 13585730cc9aSmaybee if ((ZTOV(zp)->v_type == VREG) && 1359fa9e4066Sahrens (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 1360cdb0ab79Smaybee /* we can't hold any locks when calling zfs_freesp() */ 1361cdb0ab79Smaybee zfs_dirent_unlock(dl); 1362cdb0ab79Smaybee dl = NULL; 13635730cc9aSmaybee error = zfs_freesp(zp, 0, 0, mode, TRUE); 1364df2381bfSpraks if (error == 0) { 1365da6c28aaSamw vnevent_create(ZTOV(zp), ct); 1366df2381bfSpraks } 1367fa9e4066Sahrens } 1368fa9e4066Sahrens } 1369fa9e4066Sahrens out: 1370fa9e4066Sahrens 1371fa9e4066Sahrens if (dl) 1372fa9e4066Sahrens zfs_dirent_unlock(dl); 1373fa9e4066Sahrens 1374fa9e4066Sahrens if (error) { 1375fa9e4066Sahrens if (zp) 1376fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1377fa9e4066Sahrens } else { 1378fa9e4066Sahrens *vpp = ZTOV(zp); 1379fa9e4066Sahrens /* 1380fa9e4066Sahrens * If vnode is for a device return a specfs vnode instead. 1381fa9e4066Sahrens */ 1382fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1383fa9e4066Sahrens struct vnode *svp; 1384fa9e4066Sahrens 1385fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1386fa9e4066Sahrens VN_RELE(*vpp); 1387fa9e4066Sahrens if (svp == NULL) { 1388fa9e4066Sahrens error = ENOSYS; 1389fa9e4066Sahrens } 1390fa9e4066Sahrens *vpp = svp; 1391fa9e4066Sahrens } 1392fa9e4066Sahrens } 1393da6c28aaSamw if (aclp) 1394da6c28aaSamw zfs_acl_free(aclp); 1395fa9e4066Sahrens 1396fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1397fa9e4066Sahrens return (error); 1398fa9e4066Sahrens } 1399fa9e4066Sahrens 1400fa9e4066Sahrens /* 1401fa9e4066Sahrens * Remove an entry from a directory. 1402fa9e4066Sahrens * 1403fa9e4066Sahrens * IN: dvp - vnode of directory to remove entry from. 1404fa9e4066Sahrens * name - name of entry to remove. 1405fa9e4066Sahrens * cr - credentials of caller. 1406da6c28aaSamw * ct - caller context 1407da6c28aaSamw * flags - case flags 1408fa9e4066Sahrens * 1409fa9e4066Sahrens * RETURN: 0 if success 1410fa9e4066Sahrens * error code if failure 1411fa9e4066Sahrens * 1412fa9e4066Sahrens * Timestamps: 1413fa9e4066Sahrens * dvp - ctime|mtime 1414fa9e4066Sahrens * vp - ctime (if nlink > 0) 1415fa9e4066Sahrens */ 1416da6c28aaSamw /*ARGSUSED*/ 1417fa9e4066Sahrens static int 1418da6c28aaSamw zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct, 1419da6c28aaSamw int flags) 1420fa9e4066Sahrens { 1421fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1422fa9e4066Sahrens znode_t *xzp = NULL; 1423fa9e4066Sahrens vnode_t *vp; 1424fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1425f18faf3fSek zilog_t *zilog; 1426fa9e4066Sahrens uint64_t acl_obj, xattr_obj; 1427fa9e4066Sahrens zfs_dirlock_t *dl; 1428fa9e4066Sahrens dmu_tx_t *tx; 1429893a6d32Sahrens boolean_t may_delete_now, delete_now = FALSE; 1430cdb0ab79Smaybee boolean_t unlinked, toobig = FALSE; 1431da6c28aaSamw uint64_t txtype; 1432da6c28aaSamw pathname_t *realnmp = NULL; 1433da6c28aaSamw pathname_t realnm; 1434fa9e4066Sahrens int error; 1435da6c28aaSamw int zflg = ZEXISTS; 1436fa9e4066Sahrens 14373cb34c60Sahrens ZFS_ENTER(zfsvfs); 14383cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1439f18faf3fSek zilog = zfsvfs->z_log; 1440fa9e4066Sahrens 1441da6c28aaSamw if (flags & FIGNORECASE) { 1442da6c28aaSamw zflg |= ZCILOOK; 1443da6c28aaSamw pn_alloc(&realnm); 1444da6c28aaSamw realnmp = &realnm; 1445da6c28aaSamw } 1446da6c28aaSamw 1447fa9e4066Sahrens top: 1448fa9e4066Sahrens /* 1449fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1450fa9e4066Sahrens */ 1451da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1452da6c28aaSamw NULL, realnmp)) { 1453da6c28aaSamw if (realnmp) 1454da6c28aaSamw pn_free(realnmp); 1455fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1456fa9e4066Sahrens return (error); 1457fa9e4066Sahrens } 1458fa9e4066Sahrens 1459fa9e4066Sahrens vp = ZTOV(zp); 1460fa9e4066Sahrens 1461fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1462fa9e4066Sahrens goto out; 1463fa9e4066Sahrens } 1464fa9e4066Sahrens 1465fa9e4066Sahrens /* 1466fa9e4066Sahrens * Need to use rmdir for removing directories. 1467fa9e4066Sahrens */ 1468fa9e4066Sahrens if (vp->v_type == VDIR) { 1469fa9e4066Sahrens error = EPERM; 1470fa9e4066Sahrens goto out; 1471fa9e4066Sahrens } 1472fa9e4066Sahrens 1473da6c28aaSamw vnevent_remove(vp, dvp, name, ct); 1474fa9e4066Sahrens 1475da6c28aaSamw if (realnmp) 1476ab04eb8eStimh dnlc_remove(dvp, realnmp->pn_buf); 1477da6c28aaSamw else 1478da6c28aaSamw dnlc_remove(dvp, name); 1479033f9833Sek 1480fa9e4066Sahrens mutex_enter(&vp->v_lock); 1481fa9e4066Sahrens may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1482fa9e4066Sahrens mutex_exit(&vp->v_lock); 1483fa9e4066Sahrens 1484fa9e4066Sahrens /* 1485893a6d32Sahrens * We may delete the znode now, or we may put it in the unlinked set; 1486fa9e4066Sahrens * it depends on whether we're the last link, and on whether there are 1487fa9e4066Sahrens * other holds on the vnode. So we dmu_tx_hold() the right things to 1488fa9e4066Sahrens * allow for either case. 1489fa9e4066Sahrens */ 1490fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1491ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1492fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1493cdb0ab79Smaybee if (may_delete_now) { 1494cdb0ab79Smaybee toobig = 1495cdb0ab79Smaybee zp->z_phys->zp_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT; 1496cdb0ab79Smaybee /* if the file is too big, only hold_free a token amount */ 1497cdb0ab79Smaybee dmu_tx_hold_free(tx, zp->z_id, 0, 1498cdb0ab79Smaybee (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END)); 1499cdb0ab79Smaybee } 1500fa9e4066Sahrens 1501fa9e4066Sahrens /* are there any extended attributes? */ 1502fa9e4066Sahrens if ((xattr_obj = zp->z_phys->zp_xattr) != 0) { 1503fa9e4066Sahrens /* XXX - do we need this if we are deleting? */ 1504fa9e4066Sahrens dmu_tx_hold_bonus(tx, xattr_obj); 1505fa9e4066Sahrens } 1506fa9e4066Sahrens 1507fa9e4066Sahrens /* are there any additional acls */ 1508fa9e4066Sahrens if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 && 1509fa9e4066Sahrens may_delete_now) 1510fa9e4066Sahrens dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1511fa9e4066Sahrens 1512fa9e4066Sahrens /* charge as an update -- would be nice not to charge at all */ 1513893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1514fa9e4066Sahrens 1515fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1516fa9e4066Sahrens if (error) { 1517fa9e4066Sahrens zfs_dirent_unlock(dl); 1518fa9e4066Sahrens VN_RELE(vp); 1519fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 15208a2f1b91Sahrens dmu_tx_wait(tx); 15218a2f1b91Sahrens dmu_tx_abort(tx); 1522fa9e4066Sahrens goto top; 1523fa9e4066Sahrens } 1524da6c28aaSamw if (realnmp) 1525da6c28aaSamw pn_free(realnmp); 15268a2f1b91Sahrens dmu_tx_abort(tx); 1527fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1528fa9e4066Sahrens return (error); 1529fa9e4066Sahrens } 1530fa9e4066Sahrens 1531fa9e4066Sahrens /* 1532fa9e4066Sahrens * Remove the directory entry. 1533fa9e4066Sahrens */ 1534da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked); 1535fa9e4066Sahrens 1536fa9e4066Sahrens if (error) { 1537fa9e4066Sahrens dmu_tx_commit(tx); 1538fa9e4066Sahrens goto out; 1539fa9e4066Sahrens } 1540fa9e4066Sahrens 1541893a6d32Sahrens if (unlinked) { 1542fa9e4066Sahrens mutex_enter(&vp->v_lock); 1543cdb0ab79Smaybee delete_now = may_delete_now && !toobig && 1544fa9e4066Sahrens vp->v_count == 1 && !vn_has_cached_data(vp) && 1545fa9e4066Sahrens zp->z_phys->zp_xattr == xattr_obj && 1546fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj; 1547fa9e4066Sahrens mutex_exit(&vp->v_lock); 1548fa9e4066Sahrens } 1549fa9e4066Sahrens 1550fa9e4066Sahrens if (delete_now) { 1551fa9e4066Sahrens if (zp->z_phys->zp_xattr) { 1552fa9e4066Sahrens error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp); 1553fa9e4066Sahrens ASSERT3U(error, ==, 0); 1554fa9e4066Sahrens ASSERT3U(xzp->z_phys->zp_links, ==, 2); 1555fa9e4066Sahrens dmu_buf_will_dirty(xzp->z_dbuf, tx); 1556fa9e4066Sahrens mutex_enter(&xzp->z_lock); 1557893a6d32Sahrens xzp->z_unlinked = 1; 1558fa9e4066Sahrens xzp->z_phys->zp_links = 0; 1559fa9e4066Sahrens mutex_exit(&xzp->z_lock); 1560893a6d32Sahrens zfs_unlinked_add(xzp, tx); 1561fa9e4066Sahrens zp->z_phys->zp_xattr = 0; /* probably unnecessary */ 1562fa9e4066Sahrens } 1563fa9e4066Sahrens mutex_enter(&zp->z_lock); 1564fa9e4066Sahrens mutex_enter(&vp->v_lock); 1565fa9e4066Sahrens vp->v_count--; 1566fa9e4066Sahrens ASSERT3U(vp->v_count, ==, 0); 1567fa9e4066Sahrens mutex_exit(&vp->v_lock); 1568fa9e4066Sahrens mutex_exit(&zp->z_lock); 1569fa9e4066Sahrens zfs_znode_delete(zp, tx); 1570893a6d32Sahrens } else if (unlinked) { 1571893a6d32Sahrens zfs_unlinked_add(zp, tx); 1572fa9e4066Sahrens } 1573fa9e4066Sahrens 1574da6c28aaSamw txtype = TX_REMOVE; 1575da6c28aaSamw if (flags & FIGNORECASE) 1576da6c28aaSamw txtype |= TX_CI; 1577da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1578fa9e4066Sahrens 1579fa9e4066Sahrens dmu_tx_commit(tx); 1580fa9e4066Sahrens out: 1581da6c28aaSamw if (realnmp) 1582da6c28aaSamw pn_free(realnmp); 1583da6c28aaSamw 1584fa9e4066Sahrens zfs_dirent_unlock(dl); 1585fa9e4066Sahrens 1586fa9e4066Sahrens if (!delete_now) { 1587fa9e4066Sahrens VN_RELE(vp); 1588fa9e4066Sahrens } else if (xzp) { 1589cdb0ab79Smaybee /* this rele is delayed to prevent nesting transactions */ 1590fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 1591fa9e4066Sahrens } 1592fa9e4066Sahrens 1593fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1594fa9e4066Sahrens return (error); 1595fa9e4066Sahrens } 1596fa9e4066Sahrens 1597fa9e4066Sahrens /* 1598fa9e4066Sahrens * Create a new directory and insert it into dvp using the name 1599fa9e4066Sahrens * provided. Return a pointer to the inserted directory. 1600fa9e4066Sahrens * 1601fa9e4066Sahrens * IN: dvp - vnode of directory to add subdir to. 1602fa9e4066Sahrens * dirname - name of new directory. 1603fa9e4066Sahrens * vap - attributes of new directory. 1604fa9e4066Sahrens * cr - credentials of caller. 1605da6c28aaSamw * ct - caller context 1606da6c28aaSamw * vsecp - ACL to be set 1607fa9e4066Sahrens * 1608fa9e4066Sahrens * OUT: vpp - vnode of created directory. 1609fa9e4066Sahrens * 1610fa9e4066Sahrens * RETURN: 0 if success 1611fa9e4066Sahrens * error code if failure 1612fa9e4066Sahrens * 1613fa9e4066Sahrens * Timestamps: 1614fa9e4066Sahrens * dvp - ctime|mtime updated 1615fa9e4066Sahrens * vp - ctime|mtime|atime updated 1616fa9e4066Sahrens */ 1617da6c28aaSamw /*ARGSUSED*/ 1618fa9e4066Sahrens static int 1619da6c28aaSamw zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr, 1620da6c28aaSamw caller_context_t *ct, int flags, vsecattr_t *vsecp) 1621fa9e4066Sahrens { 1622fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1623fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1624f18faf3fSek zilog_t *zilog; 1625fa9e4066Sahrens zfs_dirlock_t *dl; 1626da6c28aaSamw uint64_t txtype; 1627fa9e4066Sahrens dmu_tx_t *tx; 1628fa9e4066Sahrens int error; 1629da6c28aaSamw zfs_acl_t *aclp = NULL; 1630da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 1631da6c28aaSamw int zf = ZNEW; 1632*c1ce5987SMark Shellenbaum ksid_t *ksid; 1633*c1ce5987SMark Shellenbaum uid_t uid; 1634*c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 1635fa9e4066Sahrens 1636fa9e4066Sahrens ASSERT(vap->va_type == VDIR); 1637fa9e4066Sahrens 1638da6c28aaSamw /* 1639da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1640da6c28aaSamw * make sure file system is at proper version 1641da6c28aaSamw */ 1642da6c28aaSamw 1643*c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 1644*c1ce5987SMark Shellenbaum if (ksid) 1645*c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 1646*c1ce5987SMark Shellenbaum else 1647*c1ce5987SMark Shellenbaum uid = crgetuid(cr); 1648da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1649*c1ce5987SMark Shellenbaum (vsecp || (vap->va_mask & AT_XVATTR) || 1650*c1ce5987SMark Shellenbaum IS_EPHEMERAL(uid)) || IS_EPHEMERAL(gid)) 1651da6c28aaSamw return (EINVAL); 1652da6c28aaSamw 16533cb34c60Sahrens ZFS_ENTER(zfsvfs); 16543cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1655f18faf3fSek zilog = zfsvfs->z_log; 1656fa9e4066Sahrens 1657fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) { 1658fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1659fa9e4066Sahrens return (EINVAL); 1660fa9e4066Sahrens } 1661da6c28aaSamw 1662de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(dirname, 1663da6c28aaSamw strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1664da6c28aaSamw ZFS_EXIT(zfsvfs); 1665da6c28aaSamw return (EILSEQ); 1666da6c28aaSamw } 1667da6c28aaSamw if (flags & FIGNORECASE) 1668da6c28aaSamw zf |= ZCILOOK; 1669da6c28aaSamw 1670da6c28aaSamw if (vap->va_mask & AT_XVATTR) 1671da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1672da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1673da6c28aaSamw ZFS_EXIT(zfsvfs); 1674da6c28aaSamw return (error); 1675da6c28aaSamw } 1676fa9e4066Sahrens 1677fa9e4066Sahrens /* 1678fa9e4066Sahrens * First make sure the new directory doesn't exist. 1679fa9e4066Sahrens */ 1680da6c28aaSamw top: 1681da6c28aaSamw *vpp = NULL; 1682da6c28aaSamw 1683da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf, 1684da6c28aaSamw NULL, NULL)) { 1685fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1686fa9e4066Sahrens return (error); 1687fa9e4066Sahrens } 1688fa9e4066Sahrens 1689da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) { 1690d2443e76Smarks zfs_dirent_unlock(dl); 1691d2443e76Smarks ZFS_EXIT(zfsvfs); 1692d2443e76Smarks return (error); 1693d2443e76Smarks } 1694d2443e76Smarks 1695da6c28aaSamw if (vsecp && aclp == NULL) { 1696da6c28aaSamw error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, &aclp); 1697da6c28aaSamw if (error) { 1698da6c28aaSamw zfs_dirent_unlock(dl); 1699da6c28aaSamw ZFS_EXIT(zfsvfs); 1700da6c28aaSamw return (error); 1701da6c28aaSamw } 1702da6c28aaSamw } 1703fa9e4066Sahrens /* 1704fa9e4066Sahrens * Add a new entry to the directory. 1705fa9e4066Sahrens */ 1706fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1707ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 1708ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 1709*c1ce5987SMark Shellenbaum if ((aclp && aclp->z_has_fuids) || IS_EPHEMERAL(uid) || 1710*c1ce5987SMark Shellenbaum IS_EPHEMERAL(gid)) { 17114c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 17124c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 17134c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 17144c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 17154c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); 17164c841f60Smarks } else { 17174c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 17184c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 17194c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 17204c841f60Smarks } 1721da6c28aaSamw } 1722da6c28aaSamw if ((dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) || aclp) 1723fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1724fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1725fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1726fa9e4066Sahrens if (error) { 1727fa9e4066Sahrens zfs_dirent_unlock(dl); 1728fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 17298a2f1b91Sahrens dmu_tx_wait(tx); 17308a2f1b91Sahrens dmu_tx_abort(tx); 1731fa9e4066Sahrens goto top; 1732fa9e4066Sahrens } 17338a2f1b91Sahrens dmu_tx_abort(tx); 1734fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1735da6c28aaSamw if (aclp) 1736da6c28aaSamw zfs_acl_free(aclp); 1737fa9e4066Sahrens return (error); 1738fa9e4066Sahrens } 1739fa9e4066Sahrens 1740fa9e4066Sahrens /* 1741fa9e4066Sahrens * Create new node. 1742fa9e4066Sahrens */ 17434ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, aclp, &fuidp); 1744da6c28aaSamw 1745da6c28aaSamw if (aclp) 1746da6c28aaSamw zfs_acl_free(aclp); 1747fa9e4066Sahrens 1748fa9e4066Sahrens /* 1749fa9e4066Sahrens * Now put new name in parent dir. 1750fa9e4066Sahrens */ 1751fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1752fa9e4066Sahrens 1753fa9e4066Sahrens *vpp = ZTOV(zp); 1754fa9e4066Sahrens 1755da6c28aaSamw txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap); 1756da6c28aaSamw if (flags & FIGNORECASE) 1757da6c28aaSamw txtype |= TX_CI; 1758da6c28aaSamw zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, fuidp, vap); 1759da6c28aaSamw 1760da6c28aaSamw if (fuidp) 1761da6c28aaSamw zfs_fuid_info_free(fuidp); 1762fa9e4066Sahrens dmu_tx_commit(tx); 1763fa9e4066Sahrens 1764fa9e4066Sahrens zfs_dirent_unlock(dl); 1765fa9e4066Sahrens 1766fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1767fa9e4066Sahrens return (0); 1768fa9e4066Sahrens } 1769fa9e4066Sahrens 1770fa9e4066Sahrens /* 1771fa9e4066Sahrens * Remove a directory subdir entry. If the current working 1772fa9e4066Sahrens * directory is the same as the subdir to be removed, the 1773fa9e4066Sahrens * remove will fail. 1774fa9e4066Sahrens * 1775fa9e4066Sahrens * IN: dvp - vnode of directory to remove from. 1776fa9e4066Sahrens * name - name of directory to be removed. 1777fa9e4066Sahrens * cwd - vnode of current working directory. 1778fa9e4066Sahrens * cr - credentials of caller. 1779da6c28aaSamw * ct - caller context 1780da6c28aaSamw * flags - case flags 1781fa9e4066Sahrens * 1782fa9e4066Sahrens * RETURN: 0 if success 1783fa9e4066Sahrens * error code if failure 1784fa9e4066Sahrens * 1785fa9e4066Sahrens * Timestamps: 1786fa9e4066Sahrens * dvp - ctime|mtime updated 1787fa9e4066Sahrens */ 1788da6c28aaSamw /*ARGSUSED*/ 1789fa9e4066Sahrens static int 1790da6c28aaSamw zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr, 1791da6c28aaSamw caller_context_t *ct, int flags) 1792fa9e4066Sahrens { 1793fa9e4066Sahrens znode_t *dzp = VTOZ(dvp); 1794fa9e4066Sahrens znode_t *zp; 1795fa9e4066Sahrens vnode_t *vp; 1796fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1797f18faf3fSek zilog_t *zilog; 1798fa9e4066Sahrens zfs_dirlock_t *dl; 1799fa9e4066Sahrens dmu_tx_t *tx; 1800fa9e4066Sahrens int error; 1801da6c28aaSamw int zflg = ZEXISTS; 1802fa9e4066Sahrens 18033cb34c60Sahrens ZFS_ENTER(zfsvfs); 18043cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1805f18faf3fSek zilog = zfsvfs->z_log; 1806fa9e4066Sahrens 1807da6c28aaSamw if (flags & FIGNORECASE) 1808da6c28aaSamw zflg |= ZCILOOK; 1809fa9e4066Sahrens top: 1810fa9e4066Sahrens zp = NULL; 1811fa9e4066Sahrens 1812fa9e4066Sahrens /* 1813fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1814fa9e4066Sahrens */ 1815da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1816da6c28aaSamw NULL, NULL)) { 1817fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1818fa9e4066Sahrens return (error); 1819fa9e4066Sahrens } 1820fa9e4066Sahrens 1821fa9e4066Sahrens vp = ZTOV(zp); 1822fa9e4066Sahrens 1823fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1824fa9e4066Sahrens goto out; 1825fa9e4066Sahrens } 1826fa9e4066Sahrens 1827fa9e4066Sahrens if (vp->v_type != VDIR) { 1828fa9e4066Sahrens error = ENOTDIR; 1829fa9e4066Sahrens goto out; 1830fa9e4066Sahrens } 1831fa9e4066Sahrens 1832fa9e4066Sahrens if (vp == cwd) { 1833fa9e4066Sahrens error = EINVAL; 1834fa9e4066Sahrens goto out; 1835fa9e4066Sahrens } 1836fa9e4066Sahrens 1837da6c28aaSamw vnevent_rmdir(vp, dvp, name, ct); 1838fa9e4066Sahrens 1839fa9e4066Sahrens /* 1840af2c4821Smaybee * Grab a lock on the directory to make sure that noone is 1841af2c4821Smaybee * trying to add (or lookup) entries while we are removing it. 1842af2c4821Smaybee */ 1843af2c4821Smaybee rw_enter(&zp->z_name_lock, RW_WRITER); 1844af2c4821Smaybee 1845af2c4821Smaybee /* 1846af2c4821Smaybee * Grab a lock on the parent pointer to make sure we play well 1847fa9e4066Sahrens * with the treewalk and directory rename code. 1848fa9e4066Sahrens */ 1849fa9e4066Sahrens rw_enter(&zp->z_parent_lock, RW_WRITER); 1850fa9e4066Sahrens 1851fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1852ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1853fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1854893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1855fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1856fa9e4066Sahrens if (error) { 1857fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1858af2c4821Smaybee rw_exit(&zp->z_name_lock); 1859fa9e4066Sahrens zfs_dirent_unlock(dl); 1860fa9e4066Sahrens VN_RELE(vp); 1861fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 18628a2f1b91Sahrens dmu_tx_wait(tx); 18638a2f1b91Sahrens dmu_tx_abort(tx); 1864fa9e4066Sahrens goto top; 1865fa9e4066Sahrens } 18668a2f1b91Sahrens dmu_tx_abort(tx); 1867fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1868fa9e4066Sahrens return (error); 1869fa9e4066Sahrens } 1870fa9e4066Sahrens 1871da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, NULL); 1872fa9e4066Sahrens 1873da6c28aaSamw if (error == 0) { 1874da6c28aaSamw uint64_t txtype = TX_RMDIR; 1875da6c28aaSamw if (flags & FIGNORECASE) 1876da6c28aaSamw txtype |= TX_CI; 1877da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1878da6c28aaSamw } 1879fa9e4066Sahrens 1880fa9e4066Sahrens dmu_tx_commit(tx); 1881fa9e4066Sahrens 1882fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1883af2c4821Smaybee rw_exit(&zp->z_name_lock); 1884fa9e4066Sahrens out: 1885fa9e4066Sahrens zfs_dirent_unlock(dl); 1886fa9e4066Sahrens 1887fa9e4066Sahrens VN_RELE(vp); 1888fa9e4066Sahrens 1889fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1890fa9e4066Sahrens return (error); 1891fa9e4066Sahrens } 1892fa9e4066Sahrens 1893fa9e4066Sahrens /* 1894fa9e4066Sahrens * Read as many directory entries as will fit into the provided 1895fa9e4066Sahrens * buffer from the given directory cursor position (specified in 1896fa9e4066Sahrens * the uio structure. 1897fa9e4066Sahrens * 1898fa9e4066Sahrens * IN: vp - vnode of directory to read. 1899fa9e4066Sahrens * uio - structure supplying read location, range info, 1900fa9e4066Sahrens * and return buffer. 1901fa9e4066Sahrens * cr - credentials of caller. 1902da6c28aaSamw * ct - caller context 1903da6c28aaSamw * flags - case flags 1904fa9e4066Sahrens * 1905fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 1906fa9e4066Sahrens * eofp - set to true if end-of-file detected. 1907fa9e4066Sahrens * 1908fa9e4066Sahrens * RETURN: 0 if success 1909fa9e4066Sahrens * error code if failure 1910fa9e4066Sahrens * 1911fa9e4066Sahrens * Timestamps: 1912fa9e4066Sahrens * vp - atime updated 1913fa9e4066Sahrens * 1914fa9e4066Sahrens * Note that the low 4 bits of the cookie returned by zap is always zero. 1915fa9e4066Sahrens * This allows us to use the low range for "special" directory entries: 1916fa9e4066Sahrens * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 1917fa9e4066Sahrens * we use the offset 2 for the '.zfs' directory. 1918fa9e4066Sahrens */ 1919fa9e4066Sahrens /* ARGSUSED */ 1920fa9e4066Sahrens static int 1921da6c28aaSamw zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, 1922da6c28aaSamw caller_context_t *ct, int flags) 1923fa9e4066Sahrens { 1924fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1925fa9e4066Sahrens iovec_t *iovp; 1926da6c28aaSamw edirent_t *eodp; 1927fa9e4066Sahrens dirent64_t *odp; 1928fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 19297f6e3e7dSperrin objset_t *os; 1930fa9e4066Sahrens caddr_t outbuf; 1931fa9e4066Sahrens size_t bufsize; 1932fa9e4066Sahrens zap_cursor_t zc; 1933fa9e4066Sahrens zap_attribute_t zap; 1934fa9e4066Sahrens uint_t bytes_wanted; 1935fa9e4066Sahrens uint64_t offset; /* must be unsigned; checks for < 1 */ 1936fa9e4066Sahrens int local_eof; 19377f6e3e7dSperrin int outcount; 19387f6e3e7dSperrin int error; 19397f6e3e7dSperrin uint8_t prefetch; 1940b38f0970Sck boolean_t check_sysattrs; 1941fa9e4066Sahrens 19423cb34c60Sahrens ZFS_ENTER(zfsvfs); 19433cb34c60Sahrens ZFS_VERIFY_ZP(zp); 1944fa9e4066Sahrens 1945fa9e4066Sahrens /* 1946fa9e4066Sahrens * If we are not given an eof variable, 1947fa9e4066Sahrens * use a local one. 1948fa9e4066Sahrens */ 1949fa9e4066Sahrens if (eofp == NULL) 1950fa9e4066Sahrens eofp = &local_eof; 1951fa9e4066Sahrens 1952fa9e4066Sahrens /* 1953fa9e4066Sahrens * Check for valid iov_len. 1954fa9e4066Sahrens */ 1955fa9e4066Sahrens if (uio->uio_iov->iov_len <= 0) { 1956fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1957fa9e4066Sahrens return (EINVAL); 1958fa9e4066Sahrens } 1959fa9e4066Sahrens 1960fa9e4066Sahrens /* 1961fa9e4066Sahrens * Quit if directory has been removed (posix) 1962fa9e4066Sahrens */ 1963893a6d32Sahrens if ((*eofp = zp->z_unlinked) != 0) { 1964fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1965fa9e4066Sahrens return (0); 1966fa9e4066Sahrens } 1967fa9e4066Sahrens 19687f6e3e7dSperrin error = 0; 19697f6e3e7dSperrin os = zfsvfs->z_os; 19707f6e3e7dSperrin offset = uio->uio_loffset; 19717f6e3e7dSperrin prefetch = zp->z_zn_prefetch; 19727f6e3e7dSperrin 1973fa9e4066Sahrens /* 1974fa9e4066Sahrens * Initialize the iterator cursor. 1975fa9e4066Sahrens */ 1976fa9e4066Sahrens if (offset <= 3) { 1977fa9e4066Sahrens /* 1978fa9e4066Sahrens * Start iteration from the beginning of the directory. 1979fa9e4066Sahrens */ 19807f6e3e7dSperrin zap_cursor_init(&zc, os, zp->z_id); 1981fa9e4066Sahrens } else { 1982fa9e4066Sahrens /* 1983fa9e4066Sahrens * The offset is a serialized cursor. 1984fa9e4066Sahrens */ 19857f6e3e7dSperrin zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 1986fa9e4066Sahrens } 1987fa9e4066Sahrens 1988fa9e4066Sahrens /* 1989fa9e4066Sahrens * Get space to change directory entries into fs independent format. 1990fa9e4066Sahrens */ 1991fa9e4066Sahrens iovp = uio->uio_iov; 1992fa9e4066Sahrens bytes_wanted = iovp->iov_len; 1993fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 1994fa9e4066Sahrens bufsize = bytes_wanted; 1995fa9e4066Sahrens outbuf = kmem_alloc(bufsize, KM_SLEEP); 1996fa9e4066Sahrens odp = (struct dirent64 *)outbuf; 1997fa9e4066Sahrens } else { 1998fa9e4066Sahrens bufsize = bytes_wanted; 1999fa9e4066Sahrens odp = (struct dirent64 *)iovp->iov_base; 2000fa9e4066Sahrens } 2001da6c28aaSamw eodp = (struct edirent *)odp; 2002fa9e4066Sahrens 2003b38f0970Sck /* 20049660e5cbSJanice Chang * If this VFS supports the system attribute view interface; and 20059660e5cbSJanice Chang * we're looking at an extended attribute directory; and we care 20069660e5cbSJanice Chang * about normalization conflicts on this vfs; then we must check 20079660e5cbSJanice Chang * for normalization conflicts with the sysattr name space. 2008b38f0970Sck */ 20099660e5cbSJanice Chang check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 2010b38f0970Sck (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm && 2011b38f0970Sck (flags & V_RDDIR_ENTFLAGS); 2012b38f0970Sck 2013fa9e4066Sahrens /* 2014fa9e4066Sahrens * Transform to file-system independent format 2015fa9e4066Sahrens */ 2016fa9e4066Sahrens outcount = 0; 2017fa9e4066Sahrens while (outcount < bytes_wanted) { 2018b1b8ab34Slling ino64_t objnum; 2019b1b8ab34Slling ushort_t reclen; 2020b1b8ab34Slling off64_t *next; 2021b1b8ab34Slling 2022fa9e4066Sahrens /* 2023fa9e4066Sahrens * Special case `.', `..', and `.zfs'. 2024fa9e4066Sahrens */ 2025fa9e4066Sahrens if (offset == 0) { 2026fa9e4066Sahrens (void) strcpy(zap.za_name, "."); 2027da6c28aaSamw zap.za_normalization_conflict = 0; 2028b1b8ab34Slling objnum = zp->z_id; 2029fa9e4066Sahrens } else if (offset == 1) { 2030fa9e4066Sahrens (void) strcpy(zap.za_name, ".."); 2031da6c28aaSamw zap.za_normalization_conflict = 0; 2032b1b8ab34Slling objnum = zp->z_phys->zp_parent; 2033fa9e4066Sahrens } else if (offset == 2 && zfs_show_ctldir(zp)) { 2034fa9e4066Sahrens (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 2035da6c28aaSamw zap.za_normalization_conflict = 0; 2036b1b8ab34Slling objnum = ZFSCTL_INO_ROOT; 2037fa9e4066Sahrens } else { 2038fa9e4066Sahrens /* 2039fa9e4066Sahrens * Grab next entry. 2040fa9e4066Sahrens */ 2041fa9e4066Sahrens if (error = zap_cursor_retrieve(&zc, &zap)) { 2042fa9e4066Sahrens if ((*eofp = (error == ENOENT)) != 0) 2043fa9e4066Sahrens break; 2044fa9e4066Sahrens else 2045fa9e4066Sahrens goto update; 2046fa9e4066Sahrens } 2047fa9e4066Sahrens 2048fa9e4066Sahrens if (zap.za_integer_length != 8 || 2049fa9e4066Sahrens zap.za_num_integers != 1) { 2050fa9e4066Sahrens cmn_err(CE_WARN, "zap_readdir: bad directory " 2051fa9e4066Sahrens "entry, obj = %lld, offset = %lld\n", 2052fa9e4066Sahrens (u_longlong_t)zp->z_id, 2053fa9e4066Sahrens (u_longlong_t)offset); 2054fa9e4066Sahrens error = ENXIO; 2055fa9e4066Sahrens goto update; 2056fa9e4066Sahrens } 2057b1b8ab34Slling 2058b1b8ab34Slling objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); 2059b1b8ab34Slling /* 2060b1b8ab34Slling * MacOS X can extract the object type here such as: 2061b1b8ab34Slling * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); 2062b1b8ab34Slling */ 2063b38f0970Sck 2064b38f0970Sck if (check_sysattrs && !zap.za_normalization_conflict) { 2065b38f0970Sck zap.za_normalization_conflict = 2066b38f0970Sck xattr_sysattr_casechk(zap.za_name); 2067b38f0970Sck } 2068fa9e4066Sahrens } 2069da6c28aaSamw 2070da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) 2071da6c28aaSamw reclen = EDIRENT_RECLEN(strlen(zap.za_name)); 2072da6c28aaSamw else 2073da6c28aaSamw reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 2074fa9e4066Sahrens 2075fa9e4066Sahrens /* 2076fa9e4066Sahrens * Will this entry fit in the buffer? 2077fa9e4066Sahrens */ 2078b1b8ab34Slling if (outcount + reclen > bufsize) { 2079fa9e4066Sahrens /* 2080fa9e4066Sahrens * Did we manage to fit anything in the buffer? 2081fa9e4066Sahrens */ 2082fa9e4066Sahrens if (!outcount) { 2083fa9e4066Sahrens error = EINVAL; 2084fa9e4066Sahrens goto update; 2085fa9e4066Sahrens } 2086fa9e4066Sahrens break; 2087fa9e4066Sahrens } 2088da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) { 2089da6c28aaSamw /* 2090da6c28aaSamw * Add extended flag entry: 2091da6c28aaSamw */ 2092da6c28aaSamw eodp->ed_ino = objnum; 2093da6c28aaSamw eodp->ed_reclen = reclen; 2094da6c28aaSamw /* NOTE: ed_off is the offset for the *next* entry */ 2095da6c28aaSamw next = &(eodp->ed_off); 2096da6c28aaSamw eodp->ed_eflags = zap.za_normalization_conflict ? 2097da6c28aaSamw ED_CASE_CONFLICT : 0; 2098da6c28aaSamw (void) strncpy(eodp->ed_name, zap.za_name, 2099da6c28aaSamw EDIRENT_NAMELEN(reclen)); 2100da6c28aaSamw eodp = (edirent_t *)((intptr_t)eodp + reclen); 2101da6c28aaSamw } else { 2102da6c28aaSamw /* 2103da6c28aaSamw * Add normal entry: 2104da6c28aaSamw */ 2105da6c28aaSamw odp->d_ino = objnum; 2106da6c28aaSamw odp->d_reclen = reclen; 2107da6c28aaSamw /* NOTE: d_off is the offset for the *next* entry */ 2108da6c28aaSamw next = &(odp->d_off); 2109da6c28aaSamw (void) strncpy(odp->d_name, zap.za_name, 2110da6c28aaSamw DIRENT64_NAMELEN(reclen)); 2111da6c28aaSamw odp = (dirent64_t *)((intptr_t)odp + reclen); 2112da6c28aaSamw } 2113b1b8ab34Slling outcount += reclen; 2114fa9e4066Sahrens 2115fa9e4066Sahrens ASSERT(outcount <= bufsize); 2116fa9e4066Sahrens 2117fa9e4066Sahrens /* Prefetch znode */ 21187f6e3e7dSperrin if (prefetch) 2119b1b8ab34Slling dmu_prefetch(os, objnum, 0, 0); 2120fa9e4066Sahrens 2121fa9e4066Sahrens /* 2122fa9e4066Sahrens * Move to the next entry, fill in the previous offset. 2123fa9e4066Sahrens */ 2124fa9e4066Sahrens if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 2125fa9e4066Sahrens zap_cursor_advance(&zc); 2126fa9e4066Sahrens offset = zap_cursor_serialize(&zc); 2127fa9e4066Sahrens } else { 2128fa9e4066Sahrens offset += 1; 2129fa9e4066Sahrens } 2130fa9e4066Sahrens *next = offset; 2131fa9e4066Sahrens } 21327f6e3e7dSperrin zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 2133fa9e4066Sahrens 2134fa9e4066Sahrens if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 2135fa9e4066Sahrens iovp->iov_base += outcount; 2136fa9e4066Sahrens iovp->iov_len -= outcount; 2137fa9e4066Sahrens uio->uio_resid -= outcount; 2138fa9e4066Sahrens } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 2139fa9e4066Sahrens /* 2140fa9e4066Sahrens * Reset the pointer. 2141fa9e4066Sahrens */ 2142fa9e4066Sahrens offset = uio->uio_loffset; 2143fa9e4066Sahrens } 2144fa9e4066Sahrens 2145fa9e4066Sahrens update: 214687e5029aSahrens zap_cursor_fini(&zc); 2147fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2148fa9e4066Sahrens kmem_free(outbuf, bufsize); 2149fa9e4066Sahrens 2150fa9e4066Sahrens if (error == ENOENT) 2151fa9e4066Sahrens error = 0; 2152fa9e4066Sahrens 2153fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2154fa9e4066Sahrens 2155fa9e4066Sahrens uio->uio_loffset = offset; 2156fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2157fa9e4066Sahrens return (error); 2158fa9e4066Sahrens } 2159fa9e4066Sahrens 2160ec533521Sfr ulong_t zfs_fsync_sync_cnt = 4; 2161ec533521Sfr 2162fa9e4066Sahrens static int 2163da6c28aaSamw zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 2164fa9e4066Sahrens { 2165fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2166fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2167fa9e4066Sahrens 2168b468a217Seschrock /* 2169b468a217Seschrock * Regardless of whether this is required for standards conformance, 2170b468a217Seschrock * this is the logical behavior when fsync() is called on a file with 2171b468a217Seschrock * dirty pages. We use B_ASYNC since the ZIL transactions are already 2172b468a217Seschrock * going to be pushed out as part of the zil_commit(). 2173b468a217Seschrock */ 2174b468a217Seschrock if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && 2175b468a217Seschrock (vp->v_type == VREG) && !(IS_SWAPVP(vp))) 2176da6c28aaSamw (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr, ct); 2177b468a217Seschrock 2178ec533521Sfr (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt); 2179ec533521Sfr 21803cb34c60Sahrens ZFS_ENTER(zfsvfs); 21813cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2182b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 2183fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2184fa9e4066Sahrens return (0); 2185fa9e4066Sahrens } 2186fa9e4066Sahrens 2187da6c28aaSamw 2188fa9e4066Sahrens /* 2189fa9e4066Sahrens * Get the requested file attributes and place them in the provided 2190fa9e4066Sahrens * vattr structure. 2191fa9e4066Sahrens * 2192fa9e4066Sahrens * IN: vp - vnode of file. 2193fa9e4066Sahrens * vap - va_mask identifies requested attributes. 2194da6c28aaSamw * If AT_XVATTR set, then optional attrs are requested 2195da6c28aaSamw * flags - ATTR_NOACLCHECK (CIFS server context) 2196fa9e4066Sahrens * cr - credentials of caller. 2197da6c28aaSamw * ct - caller context 2198fa9e4066Sahrens * 2199fa9e4066Sahrens * OUT: vap - attribute values. 2200fa9e4066Sahrens * 2201fa9e4066Sahrens * RETURN: 0 (always succeeds) 2202fa9e4066Sahrens */ 2203fa9e4066Sahrens /* ARGSUSED */ 2204fa9e4066Sahrens static int 2205da6c28aaSamw zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2206da6c28aaSamw caller_context_t *ct) 2207fa9e4066Sahrens { 2208fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2209fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2210f18faf3fSek znode_phys_t *pzp; 2211da6c28aaSamw int error = 0; 2212ecd6cf80Smarks uint64_t links; 2213da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2214da6c28aaSamw xoptattr_t *xoap = NULL; 2215da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2216fa9e4066Sahrens 22173cb34c60Sahrens ZFS_ENTER(zfsvfs); 22183cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2219f18faf3fSek pzp = zp->z_phys; 2220fa9e4066Sahrens 2221da6c28aaSamw mutex_enter(&zp->z_lock); 2222da6c28aaSamw 2223da6c28aaSamw /* 2224da6c28aaSamw * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 2225da6c28aaSamw * Also, if we are the owner don't bother, since owner should 2226da6c28aaSamw * always be allowed to read basic attributes of file. 2227da6c28aaSamw */ 2228da6c28aaSamw if (!(pzp->zp_flags & ZFS_ACL_TRIVIAL) && 2229da6c28aaSamw (pzp->zp_uid != crgetuid(cr))) { 2230da6c28aaSamw if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0, 2231da6c28aaSamw skipaclchk, cr)) { 2232da6c28aaSamw mutex_exit(&zp->z_lock); 2233da6c28aaSamw ZFS_EXIT(zfsvfs); 2234da6c28aaSamw return (error); 2235da6c28aaSamw } 2236da6c28aaSamw } 2237da6c28aaSamw 2238fa9e4066Sahrens /* 2239fa9e4066Sahrens * Return all attributes. It's cheaper to provide the answer 2240fa9e4066Sahrens * than to determine whether we were asked the question. 2241fa9e4066Sahrens */ 2242fa9e4066Sahrens 2243fa9e4066Sahrens vap->va_type = vp->v_type; 2244fa9e4066Sahrens vap->va_mode = pzp->zp_mode & MODEMASK; 2245bda89588Sjp zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid); 2246fa9e4066Sahrens vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 2247fa9e4066Sahrens vap->va_nodeid = zp->z_id; 2248ecd6cf80Smarks if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp)) 2249ecd6cf80Smarks links = pzp->zp_links + 1; 2250ecd6cf80Smarks else 2251ecd6cf80Smarks links = pzp->zp_links; 2252ecd6cf80Smarks vap->va_nlink = MIN(links, UINT32_MAX); /* nlink_t limit! */ 2253fa9e4066Sahrens vap->va_size = pzp->zp_size; 225472fc53bcSmarks vap->va_rdev = vp->v_rdev; 2255fa9e4066Sahrens vap->va_seq = zp->z_seq; 2256fa9e4066Sahrens 2257fa9e4066Sahrens /* 2258da6c28aaSamw * Add in any requested optional attributes and the create time. 2259da6c28aaSamw * Also set the corresponding bits in the returned attribute bitmap. 2260fa9e4066Sahrens */ 2261da6c28aaSamw if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) { 2262da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 2263da6c28aaSamw xoap->xoa_archive = 2264da6c28aaSamw ((pzp->zp_flags & ZFS_ARCHIVE) != 0); 2265da6c28aaSamw XVA_SET_RTN(xvap, XAT_ARCHIVE); 2266da6c28aaSamw } 2267da6c28aaSamw 2268da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 2269da6c28aaSamw xoap->xoa_readonly = 2270da6c28aaSamw ((pzp->zp_flags & ZFS_READONLY) != 0); 2271da6c28aaSamw XVA_SET_RTN(xvap, XAT_READONLY); 2272da6c28aaSamw } 2273da6c28aaSamw 2274da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 2275da6c28aaSamw xoap->xoa_system = 2276da6c28aaSamw ((pzp->zp_flags & ZFS_SYSTEM) != 0); 2277da6c28aaSamw XVA_SET_RTN(xvap, XAT_SYSTEM); 2278da6c28aaSamw } 2279da6c28aaSamw 2280da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 2281da6c28aaSamw xoap->xoa_hidden = 2282da6c28aaSamw ((pzp->zp_flags & ZFS_HIDDEN) != 0); 2283da6c28aaSamw XVA_SET_RTN(xvap, XAT_HIDDEN); 2284da6c28aaSamw } 2285da6c28aaSamw 2286da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2287da6c28aaSamw xoap->xoa_nounlink = 2288da6c28aaSamw ((pzp->zp_flags & ZFS_NOUNLINK) != 0); 2289da6c28aaSamw XVA_SET_RTN(xvap, XAT_NOUNLINK); 2290da6c28aaSamw } 2291da6c28aaSamw 2292da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2293da6c28aaSamw xoap->xoa_immutable = 2294da6c28aaSamw ((pzp->zp_flags & ZFS_IMMUTABLE) != 0); 2295da6c28aaSamw XVA_SET_RTN(xvap, XAT_IMMUTABLE); 2296da6c28aaSamw } 2297da6c28aaSamw 2298da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2299da6c28aaSamw xoap->xoa_appendonly = 2300da6c28aaSamw ((pzp->zp_flags & ZFS_APPENDONLY) != 0); 2301da6c28aaSamw XVA_SET_RTN(xvap, XAT_APPENDONLY); 2302da6c28aaSamw } 2303da6c28aaSamw 2304da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2305da6c28aaSamw xoap->xoa_nodump = 2306da6c28aaSamw ((pzp->zp_flags & ZFS_NODUMP) != 0); 2307da6c28aaSamw XVA_SET_RTN(xvap, XAT_NODUMP); 2308da6c28aaSamw } 2309da6c28aaSamw 2310da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 2311da6c28aaSamw xoap->xoa_opaque = 2312da6c28aaSamw ((pzp->zp_flags & ZFS_OPAQUE) != 0); 2313da6c28aaSamw XVA_SET_RTN(xvap, XAT_OPAQUE); 2314da6c28aaSamw } 2315da6c28aaSamw 2316da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2317da6c28aaSamw xoap->xoa_av_quarantined = 2318da6c28aaSamw ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0); 2319da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 2320da6c28aaSamw } 2321da6c28aaSamw 2322da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2323da6c28aaSamw xoap->xoa_av_modified = 2324da6c28aaSamw ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0); 2325da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 2326da6c28aaSamw } 2327da6c28aaSamw 2328da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) && 2329da6c28aaSamw vp->v_type == VREG && 2330da6c28aaSamw (pzp->zp_flags & ZFS_BONUS_SCANSTAMP)) { 2331da6c28aaSamw size_t len; 2332da6c28aaSamw dmu_object_info_t doi; 2333da6c28aaSamw 2334da6c28aaSamw /* 2335da6c28aaSamw * Only VREG files have anti-virus scanstamps, so we 2336da6c28aaSamw * won't conflict with symlinks in the bonus buffer. 2337da6c28aaSamw */ 2338da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2339da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2340da6c28aaSamw sizeof (znode_phys_t); 2341da6c28aaSamw if (len <= doi.doi_bonus_size) { 2342da6c28aaSamw /* 2343da6c28aaSamw * pzp points to the start of the 2344da6c28aaSamw * znode_phys_t. pzp + 1 points to the 2345da6c28aaSamw * first byte after the znode_phys_t. 2346da6c28aaSamw */ 2347da6c28aaSamw (void) memcpy(xoap->xoa_av_scanstamp, 2348da6c28aaSamw pzp + 1, 2349da6c28aaSamw sizeof (xoap->xoa_av_scanstamp)); 2350da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); 2351da6c28aaSamw } 2352da6c28aaSamw } 2353da6c28aaSamw 2354da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 2355da6c28aaSamw ZFS_TIME_DECODE(&xoap->xoa_createtime, pzp->zp_crtime); 2356da6c28aaSamw XVA_SET_RTN(xvap, XAT_CREATETIME); 2357fa9e4066Sahrens } 2358fa9e4066Sahrens } 2359fa9e4066Sahrens 2360da6c28aaSamw ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime); 2361da6c28aaSamw ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime); 2362da6c28aaSamw ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime); 2363da6c28aaSamw 2364fa9e4066Sahrens mutex_exit(&zp->z_lock); 2365fa9e4066Sahrens 2366fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks); 2367fa9e4066Sahrens 2368fa9e4066Sahrens if (zp->z_blksz == 0) { 2369fa9e4066Sahrens /* 2370fa9e4066Sahrens * Block size hasn't been set; suggest maximal I/O transfers. 2371fa9e4066Sahrens */ 2372fa9e4066Sahrens vap->va_blksize = zfsvfs->z_max_blksz; 2373fa9e4066Sahrens } 2374fa9e4066Sahrens 2375fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2376fa9e4066Sahrens return (0); 2377fa9e4066Sahrens } 2378fa9e4066Sahrens 2379fa9e4066Sahrens /* 2380fa9e4066Sahrens * Set the file attributes to the values contained in the 2381fa9e4066Sahrens * vattr structure. 2382fa9e4066Sahrens * 2383fa9e4066Sahrens * IN: vp - vnode of file to be modified. 2384fa9e4066Sahrens * vap - new attribute values. 2385da6c28aaSamw * If AT_XVATTR set, then optional attrs are being set 2386fa9e4066Sahrens * flags - ATTR_UTIME set if non-default time values provided. 2387da6c28aaSamw * - ATTR_NOACLCHECK (CIFS context only). 2388fa9e4066Sahrens * cr - credentials of caller. 2389da6c28aaSamw * ct - caller context 2390fa9e4066Sahrens * 2391fa9e4066Sahrens * RETURN: 0 if success 2392fa9e4066Sahrens * error code if failure 2393fa9e4066Sahrens * 2394fa9e4066Sahrens * Timestamps: 2395fa9e4066Sahrens * vp - ctime updated, mtime updated if size changed. 2396fa9e4066Sahrens */ 2397fa9e4066Sahrens /* ARGSUSED */ 2398fa9e4066Sahrens static int 2399fa9e4066Sahrens zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2400fa9e4066Sahrens caller_context_t *ct) 2401fa9e4066Sahrens { 2402f18faf3fSek znode_t *zp = VTOZ(vp); 2403f18faf3fSek znode_phys_t *pzp; 2404fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2405f18faf3fSek zilog_t *zilog; 2406fa9e4066Sahrens dmu_tx_t *tx; 2407fa9e4066Sahrens vattr_t oldva; 24085730cc9aSmaybee uint_t mask = vap->va_mask; 24095730cc9aSmaybee uint_t saved_mask; 2410f92daba9Smarks int trim_mask = 0; 2411fa9e4066Sahrens uint64_t new_mode; 2412d2443e76Smarks znode_t *attrzp; 2413fa9e4066Sahrens int need_policy = FALSE; 2414fa9e4066Sahrens int err; 2415da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 2416da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2417da6c28aaSamw xoptattr_t *xoap; 24184c841f60Smarks zfs_acl_t *aclp = NULL; 2419da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2420fa9e4066Sahrens 2421fa9e4066Sahrens if (mask == 0) 2422fa9e4066Sahrens return (0); 2423fa9e4066Sahrens 2424fa9e4066Sahrens if (mask & AT_NOSET) 2425fa9e4066Sahrens return (EINVAL); 2426fa9e4066Sahrens 24273cb34c60Sahrens ZFS_ENTER(zfsvfs); 24283cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2429da6c28aaSamw 2430da6c28aaSamw pzp = zp->z_phys; 2431da6c28aaSamw zilog = zfsvfs->z_log; 2432da6c28aaSamw 2433da6c28aaSamw /* 2434da6c28aaSamw * Make sure that if we have ephemeral uid/gid or xvattr specified 2435da6c28aaSamw * that file system is at proper version level 2436da6c28aaSamw */ 2437da6c28aaSamw 2438da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 2439da6c28aaSamw (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 2440da6c28aaSamw ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) || 244102dcba3bStimh (mask & AT_XVATTR))) { 244202dcba3bStimh ZFS_EXIT(zfsvfs); 2443da6c28aaSamw return (EINVAL); 244402dcba3bStimh } 2445da6c28aaSamw 244602dcba3bStimh if (mask & AT_SIZE && vp->v_type == VDIR) { 244702dcba3bStimh ZFS_EXIT(zfsvfs); 2448fa9e4066Sahrens return (EISDIR); 244902dcba3bStimh } 2450fa9e4066Sahrens 245102dcba3bStimh if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) { 245202dcba3bStimh ZFS_EXIT(zfsvfs); 245384c5a155Smarks return (EINVAL); 245402dcba3bStimh } 245584c5a155Smarks 2456da6c28aaSamw /* 2457da6c28aaSamw * If this is an xvattr_t, then get a pointer to the structure of 2458da6c28aaSamw * optional attributes. If this is NULL, then we have a vattr_t. 2459da6c28aaSamw */ 2460da6c28aaSamw xoap = xva_getxoptattr(xvap); 2461da6c28aaSamw 2462da6c28aaSamw /* 2463da6c28aaSamw * Immutable files can only alter immutable bit and atime 2464da6c28aaSamw */ 2465da6c28aaSamw if ((pzp->zp_flags & ZFS_IMMUTABLE) && 2466da6c28aaSamw ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) || 246702dcba3bStimh ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { 246802dcba3bStimh ZFS_EXIT(zfsvfs); 2469da6c28aaSamw return (EPERM); 247002dcba3bStimh } 2471da6c28aaSamw 247202dcba3bStimh if ((mask & AT_SIZE) && (pzp->zp_flags & ZFS_READONLY)) { 247302dcba3bStimh ZFS_EXIT(zfsvfs); 2474da6c28aaSamw return (EPERM); 247502dcba3bStimh } 2476fa9e4066Sahrens 247793129341Smarks /* 247893129341Smarks * Verify timestamps doesn't overflow 32 bits. 247993129341Smarks * ZFS can handle large timestamps, but 32bit syscalls can't 248093129341Smarks * handle times greater than 2039. This check should be removed 248193129341Smarks * once large timestamps are fully supported. 248293129341Smarks */ 248393129341Smarks if (mask & (AT_ATIME | AT_MTIME)) { 248493129341Smarks if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || 248593129341Smarks ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { 248693129341Smarks ZFS_EXIT(zfsvfs); 248793129341Smarks return (EOVERFLOW); 248893129341Smarks } 248993129341Smarks } 249093129341Smarks 2491fa9e4066Sahrens top: 2492d2443e76Smarks attrzp = NULL; 2493fa9e4066Sahrens 2494fa9e4066Sahrens if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 2495fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2496fa9e4066Sahrens return (EROFS); 2497fa9e4066Sahrens } 2498fa9e4066Sahrens 2499fa9e4066Sahrens /* 2500fa9e4066Sahrens * First validate permissions 2501fa9e4066Sahrens */ 2502fa9e4066Sahrens 2503fa9e4066Sahrens if (mask & AT_SIZE) { 2504da6c28aaSamw err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr); 2505fa9e4066Sahrens if (err) { 2506fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2507fa9e4066Sahrens return (err); 2508fa9e4066Sahrens } 25095730cc9aSmaybee /* 25105730cc9aSmaybee * XXX - Note, we are not providing any open 25115730cc9aSmaybee * mode flags here (like FNDELAY), so we may 25125730cc9aSmaybee * block if there are locks present... this 25135730cc9aSmaybee * should be addressed in openat(). 25145730cc9aSmaybee */ 2515cdb0ab79Smaybee /* XXX - would it be OK to generate a log record here? */ 2516cdb0ab79Smaybee err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 25175730cc9aSmaybee if (err) { 25185730cc9aSmaybee ZFS_EXIT(zfsvfs); 25195730cc9aSmaybee return (err); 25205730cc9aSmaybee } 2521fa9e4066Sahrens } 2522fa9e4066Sahrens 2523da6c28aaSamw if (mask & (AT_ATIME|AT_MTIME) || 2524da6c28aaSamw ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || 2525da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_READONLY) || 2526da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || 2527da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_CREATETIME) || 2528da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) 2529da6c28aaSamw need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, 2530da6c28aaSamw skipaclchk, cr); 2531fa9e4066Sahrens 2532fa9e4066Sahrens if (mask & (AT_UID|AT_GID)) { 2533fa9e4066Sahrens int idmask = (mask & (AT_UID|AT_GID)); 2534fa9e4066Sahrens int take_owner; 2535fa9e4066Sahrens int take_group; 2536fa9e4066Sahrens 2537a933bc41Smarks /* 2538a933bc41Smarks * NOTE: even if a new mode is being set, 2539a933bc41Smarks * we may clear S_ISUID/S_ISGID bits. 2540a933bc41Smarks */ 2541a933bc41Smarks 2542a933bc41Smarks if (!(mask & AT_MODE)) 2543a933bc41Smarks vap->va_mode = pzp->zp_mode; 2544a933bc41Smarks 2545fa9e4066Sahrens /* 2546fa9e4066Sahrens * Take ownership or chgrp to group we are a member of 2547fa9e4066Sahrens */ 2548fa9e4066Sahrens 2549fa9e4066Sahrens take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 2550da6c28aaSamw take_group = (mask & AT_GID) && 2551da6c28aaSamw zfs_groupmember(zfsvfs, vap->va_gid, cr); 2552fa9e4066Sahrens 2553fa9e4066Sahrens /* 2554fa9e4066Sahrens * If both AT_UID and AT_GID are set then take_owner and 2555fa9e4066Sahrens * take_group must both be set in order to allow taking 2556fa9e4066Sahrens * ownership. 2557fa9e4066Sahrens * 2558fa9e4066Sahrens * Otherwise, send the check through secpolicy_vnode_setattr() 2559fa9e4066Sahrens * 2560fa9e4066Sahrens */ 2561fa9e4066Sahrens 2562fa9e4066Sahrens if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 2563fa9e4066Sahrens ((idmask == AT_UID) && take_owner) || 2564fa9e4066Sahrens ((idmask == AT_GID) && take_group)) { 2565da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, 2566da6c28aaSamw skipaclchk, cr) == 0) { 2567fa9e4066Sahrens /* 2568fa9e4066Sahrens * Remove setuid/setgid for non-privileged users 2569fa9e4066Sahrens */ 257013f9f30eSmarks secpolicy_setid_clear(vap, cr); 2571f92daba9Smarks trim_mask = (mask & (AT_UID|AT_GID)); 2572fa9e4066Sahrens } else { 2573fa9e4066Sahrens need_policy = TRUE; 2574fa9e4066Sahrens } 2575fa9e4066Sahrens } else { 2576fa9e4066Sahrens need_policy = TRUE; 2577fa9e4066Sahrens } 2578fa9e4066Sahrens } 2579fa9e4066Sahrens 2580f92daba9Smarks mutex_enter(&zp->z_lock); 2581f92daba9Smarks oldva.va_mode = pzp->zp_mode; 2582bda89588Sjp zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); 2583da6c28aaSamw if (mask & AT_XVATTR) { 2584da6c28aaSamw if ((need_policy == FALSE) && 2585da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_APPENDONLY) && 2586da6c28aaSamw xoap->xoa_appendonly != 2587da6c28aaSamw ((pzp->zp_flags & ZFS_APPENDONLY) != 0)) || 2588da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_NOUNLINK) && 2589da6c28aaSamw xoap->xoa_nounlink != 2590da6c28aaSamw ((pzp->zp_flags & ZFS_NOUNLINK) != 0)) || 2591da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE) && 2592da6c28aaSamw xoap->xoa_immutable != 2593da6c28aaSamw ((pzp->zp_flags & ZFS_IMMUTABLE) != 0)) || 2594da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_NODUMP) && 2595da6c28aaSamw xoap->xoa_nodump != 2596da6c28aaSamw ((pzp->zp_flags & ZFS_NODUMP) != 0)) || 2597da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED) && 2598da6c28aaSamw xoap->xoa_av_modified != 2599da6c28aaSamw ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0)) || 2600e8f97327Smarks ((XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED) && 2601e8f97327Smarks ((vp->v_type != VREG && xoap->xoa_av_quarantined) || 2602da6c28aaSamw xoap->xoa_av_quarantined != 2603e8f97327Smarks ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0)))) || 2604da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) || 2605da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { 2606da6c28aaSamw need_policy = TRUE; 2607da6c28aaSamw } 2608da6c28aaSamw } 2609da6c28aaSamw 2610f92daba9Smarks mutex_exit(&zp->z_lock); 2611fa9e4066Sahrens 2612f92daba9Smarks if (mask & AT_MODE) { 2613da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) { 2614f92daba9Smarks err = secpolicy_setid_setsticky_clear(vp, vap, 2615f92daba9Smarks &oldva, cr); 2616f92daba9Smarks if (err) { 2617f92daba9Smarks ZFS_EXIT(zfsvfs); 2618f92daba9Smarks return (err); 2619f92daba9Smarks } 2620f92daba9Smarks trim_mask |= AT_MODE; 2621f92daba9Smarks } else { 2622f92daba9Smarks need_policy = TRUE; 2623f92daba9Smarks } 2624f92daba9Smarks } 262513f9f30eSmarks 2626f92daba9Smarks if (need_policy) { 262713f9f30eSmarks /* 262813f9f30eSmarks * If trim_mask is set then take ownership 2629f92daba9Smarks * has been granted or write_acl is present and user 2630f92daba9Smarks * has the ability to modify mode. In that case remove 2631f92daba9Smarks * UID|GID and or MODE from mask so that 263213f9f30eSmarks * secpolicy_vnode_setattr() doesn't revoke it. 263313f9f30eSmarks */ 263413f9f30eSmarks 2635f92daba9Smarks if (trim_mask) { 2636f92daba9Smarks saved_mask = vap->va_mask; 2637f92daba9Smarks vap->va_mask &= ~trim_mask; 2638f92daba9Smarks } 2639fa9e4066Sahrens err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 2640da6c28aaSamw (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp); 2641fa9e4066Sahrens if (err) { 2642fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2643fa9e4066Sahrens return (err); 2644fa9e4066Sahrens } 264513f9f30eSmarks 264613f9f30eSmarks if (trim_mask) 2647f92daba9Smarks vap->va_mask |= saved_mask; 2648fa9e4066Sahrens } 2649fa9e4066Sahrens 2650fa9e4066Sahrens /* 2651fa9e4066Sahrens * secpolicy_vnode_setattr, or take ownership may have 2652fa9e4066Sahrens * changed va_mask 2653fa9e4066Sahrens */ 2654fa9e4066Sahrens mask = vap->va_mask; 2655fa9e4066Sahrens 2656fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2657fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 26584c841f60Smarks if (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 26594c841f60Smarks ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid))) { 26604c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 26614c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 26624c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 26634c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 26644c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); 26654c841f60Smarks } else { 26664c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 26674c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 26684c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 26694c841f60Smarks } 2670da6c28aaSamw } 2671fa9e4066Sahrens 2672fa9e4066Sahrens if (mask & AT_MODE) { 2673169cdae2Smarks uint64_t pmode = pzp->zp_mode; 2674fa9e4066Sahrens 2675169cdae2Smarks new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 2676fa9e4066Sahrens 26774c841f60Smarks if (err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)) { 26784c841f60Smarks dmu_tx_abort(tx); 26794c841f60Smarks ZFS_EXIT(zfsvfs); 26804c841f60Smarks return (err); 26814c841f60Smarks } 2682da6c28aaSamw if (pzp->zp_acl.z_acl_extern_obj) { 2683da6c28aaSamw /* Are we upgrading ACL from old V0 format to new V1 */ 2684da6c28aaSamw if (zfsvfs->z_version <= ZPL_VERSION_FUID && 2685da6c28aaSamw pzp->zp_acl.z_acl_version == 2686da6c28aaSamw ZFS_ACL_VERSION_INITIAL) { 2687da6c28aaSamw dmu_tx_hold_free(tx, 2688da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 2689da6c28aaSamw DMU_OBJECT_END); 2690da6c28aaSamw dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 26914c841f60Smarks 0, aclp->z_acl_bytes); 2692da6c28aaSamw } else { 2693da6c28aaSamw dmu_tx_hold_write(tx, 2694da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 26954c841f60Smarks aclp->z_acl_bytes); 26964c841f60Smarks } 26976d38e247Smarks } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) { 26986d38e247Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 26996d38e247Smarks 0, aclp->z_acl_bytes); 2700da6c28aaSamw } 2701fa9e4066Sahrens } 2702fa9e4066Sahrens 2703da6c28aaSamw if ((mask & (AT_UID | AT_GID)) && pzp->zp_xattr != 0) { 2704da6c28aaSamw err = zfs_zget(zp->z_zfsvfs, pzp->zp_xattr, &attrzp); 2705d2443e76Smarks if (err) { 2706d2443e76Smarks dmu_tx_abort(tx); 2707d2443e76Smarks ZFS_EXIT(zfsvfs); 27084c841f60Smarks if (aclp) 27094c841f60Smarks zfs_acl_free(aclp); 2710d2443e76Smarks return (err); 2711d2443e76Smarks } 2712d2443e76Smarks dmu_tx_hold_bonus(tx, attrzp->z_id); 2713d2443e76Smarks } 2714d2443e76Smarks 2715fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 2716fa9e4066Sahrens if (err) { 2717d2443e76Smarks if (attrzp) 2718d2443e76Smarks VN_RELE(ZTOV(attrzp)); 27194c841f60Smarks 27204c841f60Smarks if (aclp) { 27214c841f60Smarks zfs_acl_free(aclp); 27224c841f60Smarks aclp = NULL; 27234c841f60Smarks } 27244c841f60Smarks 2725fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 27268a2f1b91Sahrens dmu_tx_wait(tx); 27278a2f1b91Sahrens dmu_tx_abort(tx); 2728fa9e4066Sahrens goto top; 2729fa9e4066Sahrens } 27308a2f1b91Sahrens dmu_tx_abort(tx); 2731fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2732fa9e4066Sahrens return (err); 2733fa9e4066Sahrens } 2734fa9e4066Sahrens 2735fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 2736fa9e4066Sahrens 2737fa9e4066Sahrens /* 2738fa9e4066Sahrens * Set each attribute requested. 2739fa9e4066Sahrens * We group settings according to the locks they need to acquire. 2740fa9e4066Sahrens * 2741fa9e4066Sahrens * Note: you cannot set ctime directly, although it will be 2742fa9e4066Sahrens * updated as a side-effect of calling this function. 2743fa9e4066Sahrens */ 2744fa9e4066Sahrens 2745fa9e4066Sahrens mutex_enter(&zp->z_lock); 2746fa9e4066Sahrens 2747fa9e4066Sahrens if (mask & AT_MODE) { 27484c841f60Smarks mutex_enter(&zp->z_acl_lock); 27494c841f60Smarks zp->z_phys->zp_mode = new_mode; 27504c841f60Smarks err = zfs_aclset_common(zp, aclp, cr, &fuidp, tx); 2751fa9e4066Sahrens ASSERT3U(err, ==, 0); 27524c841f60Smarks mutex_exit(&zp->z_acl_lock); 2753fa9e4066Sahrens } 2754fa9e4066Sahrens 2755d2443e76Smarks if (attrzp) 2756d2443e76Smarks mutex_enter(&attrzp->z_lock); 2757d2443e76Smarks 2758d2443e76Smarks if (mask & AT_UID) { 2759da6c28aaSamw pzp->zp_uid = zfs_fuid_create(zfsvfs, 2760bda89588Sjp vap->va_uid, cr, ZFS_OWNER, tx, &fuidp); 2761d2443e76Smarks if (attrzp) { 2762da6c28aaSamw attrzp->z_phys->zp_uid = zfs_fuid_create(zfsvfs, 2763bda89588Sjp vap->va_uid, cr, ZFS_OWNER, tx, &fuidp); 2764d2443e76Smarks } 2765d2443e76Smarks } 2766fa9e4066Sahrens 2767d2443e76Smarks if (mask & AT_GID) { 2768da6c28aaSamw pzp->zp_gid = zfs_fuid_create(zfsvfs, vap->va_gid, 2769bda89588Sjp cr, ZFS_GROUP, tx, &fuidp); 2770d2443e76Smarks if (attrzp) 2771da6c28aaSamw attrzp->z_phys->zp_gid = zfs_fuid_create(zfsvfs, 2772bda89588Sjp vap->va_gid, cr, ZFS_GROUP, tx, &fuidp); 2773d2443e76Smarks } 2774d2443e76Smarks 27754c841f60Smarks if (aclp) 27764c841f60Smarks zfs_acl_free(aclp); 27774c841f60Smarks 2778d2443e76Smarks if (attrzp) 2779d2443e76Smarks mutex_exit(&attrzp->z_lock); 2780fa9e4066Sahrens 2781fa9e4066Sahrens if (mask & AT_ATIME) 2782fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 2783fa9e4066Sahrens 2784fa9e4066Sahrens if (mask & AT_MTIME) 2785fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 2786fa9e4066Sahrens 2787cdb0ab79Smaybee /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */ 27885730cc9aSmaybee if (mask & AT_SIZE) 2789fa9e4066Sahrens zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx); 27905730cc9aSmaybee else if (mask != 0) 2791fa9e4066Sahrens zfs_time_stamper_locked(zp, STATE_CHANGED, tx); 2792da6c28aaSamw /* 2793da6c28aaSamw * Do this after setting timestamps to prevent timestamp 2794da6c28aaSamw * update from toggling bit 2795da6c28aaSamw */ 2796da6c28aaSamw 2797da6c28aaSamw if (xoap && (mask & AT_XVATTR)) { 2798da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { 2799da6c28aaSamw size_t len; 2800da6c28aaSamw dmu_object_info_t doi; 2801da6c28aaSamw 2802da6c28aaSamw ASSERT(vp->v_type == VREG); 2803da6c28aaSamw 2804da6c28aaSamw /* Grow the bonus buffer if necessary. */ 2805da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2806da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2807da6c28aaSamw sizeof (znode_phys_t); 2808da6c28aaSamw if (len > doi.doi_bonus_size) 2809da6c28aaSamw VERIFY(dmu_set_bonus(zp->z_dbuf, len, tx) == 0); 2810da6c28aaSamw } 2811da6c28aaSamw zfs_xvattr_set(zp, xvap); 2812da6c28aaSamw } 2813fa9e4066Sahrens 28145730cc9aSmaybee if (mask != 0) 2815da6c28aaSamw zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp); 2816fa9e4066Sahrens 2817da6c28aaSamw if (fuidp) 2818da6c28aaSamw zfs_fuid_info_free(fuidp); 2819fa9e4066Sahrens mutex_exit(&zp->z_lock); 2820fa9e4066Sahrens 2821d2443e76Smarks if (attrzp) 2822d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2823d2443e76Smarks 2824fa9e4066Sahrens dmu_tx_commit(tx); 2825fa9e4066Sahrens 2826fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2827fa9e4066Sahrens return (err); 2828fa9e4066Sahrens } 2829fa9e4066Sahrens 2830fa9e4066Sahrens typedef struct zfs_zlock { 2831fa9e4066Sahrens krwlock_t *zl_rwlock; /* lock we acquired */ 2832fa9e4066Sahrens znode_t *zl_znode; /* znode we held */ 2833fa9e4066Sahrens struct zfs_zlock *zl_next; /* next in list */ 2834fa9e4066Sahrens } zfs_zlock_t; 2835fa9e4066Sahrens 2836ff008e00Smaybee /* 2837ff008e00Smaybee * Drop locks and release vnodes that were held by zfs_rename_lock(). 2838ff008e00Smaybee */ 2839ff008e00Smaybee static void 2840ff008e00Smaybee zfs_rename_unlock(zfs_zlock_t **zlpp) 2841ff008e00Smaybee { 2842ff008e00Smaybee zfs_zlock_t *zl; 2843ff008e00Smaybee 2844ff008e00Smaybee while ((zl = *zlpp) != NULL) { 2845ff008e00Smaybee if (zl->zl_znode != NULL) 2846ff008e00Smaybee VN_RELE(ZTOV(zl->zl_znode)); 2847ff008e00Smaybee rw_exit(zl->zl_rwlock); 2848ff008e00Smaybee *zlpp = zl->zl_next; 2849ff008e00Smaybee kmem_free(zl, sizeof (*zl)); 2850ff008e00Smaybee } 2851ff008e00Smaybee } 2852ff008e00Smaybee 2853ff008e00Smaybee /* 2854ff008e00Smaybee * Search back through the directory tree, using the ".." entries. 2855ff008e00Smaybee * Lock each directory in the chain to prevent concurrent renames. 2856ff008e00Smaybee * Fail any attempt to move a directory into one of its own descendants. 2857ff008e00Smaybee * XXX - z_parent_lock can overlap with map or grow locks 2858ff008e00Smaybee */ 2859fa9e4066Sahrens static int 2860fa9e4066Sahrens zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 2861fa9e4066Sahrens { 2862fa9e4066Sahrens zfs_zlock_t *zl; 2863feb08c6bSbillm znode_t *zp = tdzp; 2864fa9e4066Sahrens uint64_t rootid = zp->z_zfsvfs->z_root; 2865fa9e4066Sahrens uint64_t *oidp = &zp->z_id; 2866fa9e4066Sahrens krwlock_t *rwlp = &szp->z_parent_lock; 2867fa9e4066Sahrens krw_t rw = RW_WRITER; 2868fa9e4066Sahrens 2869fa9e4066Sahrens /* 2870fa9e4066Sahrens * First pass write-locks szp and compares to zp->z_id. 2871fa9e4066Sahrens * Later passes read-lock zp and compare to zp->z_parent. 2872fa9e4066Sahrens */ 2873fa9e4066Sahrens do { 2874ff008e00Smaybee if (!rw_tryenter(rwlp, rw)) { 2875ff008e00Smaybee /* 2876ff008e00Smaybee * Another thread is renaming in this path. 2877ff008e00Smaybee * Note that if we are a WRITER, we don't have any 2878ff008e00Smaybee * parent_locks held yet. 2879ff008e00Smaybee */ 2880ff008e00Smaybee if (rw == RW_READER && zp->z_id > szp->z_id) { 2881ff008e00Smaybee /* 2882ff008e00Smaybee * Drop our locks and restart 2883ff008e00Smaybee */ 2884ff008e00Smaybee zfs_rename_unlock(&zl); 2885ff008e00Smaybee *zlpp = NULL; 2886ff008e00Smaybee zp = tdzp; 2887ff008e00Smaybee oidp = &zp->z_id; 2888ff008e00Smaybee rwlp = &szp->z_parent_lock; 2889ff008e00Smaybee rw = RW_WRITER; 2890ff008e00Smaybee continue; 2891ff008e00Smaybee } else { 2892ff008e00Smaybee /* 2893ff008e00Smaybee * Wait for other thread to drop its locks 2894ff008e00Smaybee */ 2895ff008e00Smaybee rw_enter(rwlp, rw); 2896ff008e00Smaybee } 2897ff008e00Smaybee } 2898ff008e00Smaybee 2899fa9e4066Sahrens zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 2900fa9e4066Sahrens zl->zl_rwlock = rwlp; 2901fa9e4066Sahrens zl->zl_znode = NULL; 2902fa9e4066Sahrens zl->zl_next = *zlpp; 2903fa9e4066Sahrens *zlpp = zl; 2904fa9e4066Sahrens 2905fa9e4066Sahrens if (*oidp == szp->z_id) /* We're a descendant of szp */ 2906fa9e4066Sahrens return (EINVAL); 2907fa9e4066Sahrens 2908fa9e4066Sahrens if (*oidp == rootid) /* We've hit the top */ 2909fa9e4066Sahrens return (0); 2910fa9e4066Sahrens 2911fa9e4066Sahrens if (rw == RW_READER) { /* i.e. not the first pass */ 2912fa9e4066Sahrens int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp); 2913fa9e4066Sahrens if (error) 2914fa9e4066Sahrens return (error); 2915fa9e4066Sahrens zl->zl_znode = zp; 2916fa9e4066Sahrens } 2917fa9e4066Sahrens oidp = &zp->z_phys->zp_parent; 2918fa9e4066Sahrens rwlp = &zp->z_parent_lock; 2919fa9e4066Sahrens rw = RW_READER; 2920fa9e4066Sahrens 2921fa9e4066Sahrens } while (zp->z_id != sdzp->z_id); 2922fa9e4066Sahrens 2923fa9e4066Sahrens return (0); 2924fa9e4066Sahrens } 2925fa9e4066Sahrens 2926fa9e4066Sahrens /* 2927fa9e4066Sahrens * Move an entry from the provided source directory to the target 2928fa9e4066Sahrens * directory. Change the entry name as indicated. 2929fa9e4066Sahrens * 2930fa9e4066Sahrens * IN: sdvp - Source directory containing the "old entry". 2931fa9e4066Sahrens * snm - Old entry name. 2932fa9e4066Sahrens * tdvp - Target directory to contain the "new entry". 2933fa9e4066Sahrens * tnm - New entry name. 2934fa9e4066Sahrens * cr - credentials of caller. 2935da6c28aaSamw * ct - caller context 2936da6c28aaSamw * flags - case flags 2937fa9e4066Sahrens * 2938fa9e4066Sahrens * RETURN: 0 if success 2939fa9e4066Sahrens * error code if failure 2940fa9e4066Sahrens * 2941fa9e4066Sahrens * Timestamps: 2942fa9e4066Sahrens * sdvp,tdvp - ctime|mtime updated 2943fa9e4066Sahrens */ 2944da6c28aaSamw /*ARGSUSED*/ 2945fa9e4066Sahrens static int 2946da6c28aaSamw zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr, 2947da6c28aaSamw caller_context_t *ct, int flags) 2948fa9e4066Sahrens { 2949fa9e4066Sahrens znode_t *tdzp, *szp, *tzp; 2950fa9e4066Sahrens znode_t *sdzp = VTOZ(sdvp); 2951fa9e4066Sahrens zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 2952f18faf3fSek zilog_t *zilog; 2953fa9e4066Sahrens vnode_t *realvp; 2954fa9e4066Sahrens zfs_dirlock_t *sdl, *tdl; 2955fa9e4066Sahrens dmu_tx_t *tx; 2956fa9e4066Sahrens zfs_zlock_t *zl; 2957da6c28aaSamw int cmp, serr, terr; 2958da6c28aaSamw int error = 0; 2959da6c28aaSamw int zflg = 0; 2960fa9e4066Sahrens 29613cb34c60Sahrens ZFS_ENTER(zfsvfs); 29623cb34c60Sahrens ZFS_VERIFY_ZP(sdzp); 2963f18faf3fSek zilog = zfsvfs->z_log; 2964fa9e4066Sahrens 2965fa9e4066Sahrens /* 2966fa9e4066Sahrens * Make sure we have the real vp for the target directory. 2967fa9e4066Sahrens */ 2968da6c28aaSamw if (VOP_REALVP(tdvp, &realvp, ct) == 0) 2969fa9e4066Sahrens tdvp = realvp; 2970fa9e4066Sahrens 2971fa9e4066Sahrens if (tdvp->v_vfsp != sdvp->v_vfsp) { 2972fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2973fa9e4066Sahrens return (EXDEV); 2974fa9e4066Sahrens } 2975fa9e4066Sahrens 2976fa9e4066Sahrens tdzp = VTOZ(tdvp); 29773cb34c60Sahrens ZFS_VERIFY_ZP(tdzp); 2978de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(tnm, 2979da6c28aaSamw strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 2980da6c28aaSamw ZFS_EXIT(zfsvfs); 2981da6c28aaSamw return (EILSEQ); 2982da6c28aaSamw } 2983da6c28aaSamw 2984da6c28aaSamw if (flags & FIGNORECASE) 2985da6c28aaSamw zflg |= ZCILOOK; 2986da6c28aaSamw 2987fa9e4066Sahrens top: 2988fa9e4066Sahrens szp = NULL; 2989fa9e4066Sahrens tzp = NULL; 2990fa9e4066Sahrens zl = NULL; 2991fa9e4066Sahrens 2992fa9e4066Sahrens /* 2993fa9e4066Sahrens * This is to prevent the creation of links into attribute space 2994fa9e4066Sahrens * by renaming a linked file into/outof an attribute directory. 2995fa9e4066Sahrens * See the comment in zfs_link() for why this is considered bad. 2996fa9e4066Sahrens */ 2997fa9e4066Sahrens if ((tdzp->z_phys->zp_flags & ZFS_XATTR) != 2998fa9e4066Sahrens (sdzp->z_phys->zp_flags & ZFS_XATTR)) { 2999fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3000fa9e4066Sahrens return (EINVAL); 3001fa9e4066Sahrens } 3002fa9e4066Sahrens 3003fa9e4066Sahrens /* 3004fa9e4066Sahrens * Lock source and target directory entries. To prevent deadlock, 3005fa9e4066Sahrens * a lock ordering must be defined. We lock the directory with 3006fa9e4066Sahrens * the smallest object id first, or if it's a tie, the one with 3007fa9e4066Sahrens * the lexically first name. 3008fa9e4066Sahrens */ 3009fa9e4066Sahrens if (sdzp->z_id < tdzp->z_id) { 3010fa9e4066Sahrens cmp = -1; 3011fa9e4066Sahrens } else if (sdzp->z_id > tdzp->z_id) { 3012fa9e4066Sahrens cmp = 1; 3013fa9e4066Sahrens } else { 3014da6c28aaSamw /* 3015da6c28aaSamw * First compare the two name arguments without 3016da6c28aaSamw * considering any case folding. 3017da6c28aaSamw */ 3018da6c28aaSamw int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER); 3019da6c28aaSamw 3020da6c28aaSamw cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error); 3021de8267e0Stimh ASSERT(error == 0 || !zfsvfs->z_utf8); 3022fa9e4066Sahrens if (cmp == 0) { 3023fa9e4066Sahrens /* 3024fa9e4066Sahrens * POSIX: "If the old argument and the new argument 3025fa9e4066Sahrens * both refer to links to the same existing file, 3026fa9e4066Sahrens * the rename() function shall return successfully 3027fa9e4066Sahrens * and perform no other action." 3028fa9e4066Sahrens */ 3029fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3030fa9e4066Sahrens return (0); 3031fa9e4066Sahrens } 3032da6c28aaSamw /* 3033da6c28aaSamw * If the file system is case-folding, then we may 3034da6c28aaSamw * have some more checking to do. A case-folding file 3035da6c28aaSamw * system is either supporting mixed case sensitivity 3036da6c28aaSamw * access or is completely case-insensitive. Note 3037da6c28aaSamw * that the file system is always case preserving. 3038da6c28aaSamw * 3039da6c28aaSamw * In mixed sensitivity mode case sensitive behavior 3040da6c28aaSamw * is the default. FIGNORECASE must be used to 3041da6c28aaSamw * explicitly request case insensitive behavior. 3042da6c28aaSamw * 3043da6c28aaSamw * If the source and target names provided differ only 3044da6c28aaSamw * by case (e.g., a request to rename 'tim' to 'Tim'), 3045da6c28aaSamw * we will treat this as a special case in the 3046da6c28aaSamw * case-insensitive mode: as long as the source name 3047da6c28aaSamw * is an exact match, we will allow this to proceed as 3048da6c28aaSamw * a name-change request. 3049da6c28aaSamw */ 3050de8267e0Stimh if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 3051de8267e0Stimh (zfsvfs->z_case == ZFS_CASE_MIXED && 3052de8267e0Stimh flags & FIGNORECASE)) && 3053da6c28aaSamw u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST, 3054da6c28aaSamw &error) == 0) { 3055da6c28aaSamw /* 3056da6c28aaSamw * case preserving rename request, require exact 3057da6c28aaSamw * name matches 3058da6c28aaSamw */ 3059da6c28aaSamw zflg |= ZCIEXACT; 3060da6c28aaSamw zflg &= ~ZCILOOK; 3061da6c28aaSamw } 3062fa9e4066Sahrens } 3063da6c28aaSamw 3064fa9e4066Sahrens if (cmp < 0) { 3065da6c28aaSamw serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, 3066da6c28aaSamw ZEXISTS | zflg, NULL, NULL); 3067da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3068da6c28aaSamw tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL); 3069fa9e4066Sahrens } else { 3070da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3071da6c28aaSamw tdzp, tnm, &tzp, zflg, NULL, NULL); 3072da6c28aaSamw serr = zfs_dirent_lock(&sdl, 3073da6c28aaSamw sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg, 3074da6c28aaSamw NULL, NULL); 3075fa9e4066Sahrens } 3076fa9e4066Sahrens 3077fa9e4066Sahrens if (serr) { 3078fa9e4066Sahrens /* 3079fa9e4066Sahrens * Source entry invalid or not there. 3080fa9e4066Sahrens */ 3081fa9e4066Sahrens if (!terr) { 3082fa9e4066Sahrens zfs_dirent_unlock(tdl); 3083fa9e4066Sahrens if (tzp) 3084fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3085fa9e4066Sahrens } 3086fa9e4066Sahrens if (strcmp(snm, "..") == 0) 3087fa9e4066Sahrens serr = EINVAL; 3088fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3089fa9e4066Sahrens return (serr); 3090fa9e4066Sahrens } 3091fa9e4066Sahrens if (terr) { 3092fa9e4066Sahrens zfs_dirent_unlock(sdl); 3093fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3094fa9e4066Sahrens if (strcmp(tnm, "..") == 0) 3095fa9e4066Sahrens terr = EINVAL; 3096fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3097fa9e4066Sahrens return (terr); 3098fa9e4066Sahrens } 3099fa9e4066Sahrens 3100fa9e4066Sahrens /* 3101fa9e4066Sahrens * Must have write access at the source to remove the old entry 3102fa9e4066Sahrens * and write access at the target to create the new entry. 3103fa9e4066Sahrens * Note that if target and source are the same, this can be 3104fa9e4066Sahrens * done in a single check. 3105fa9e4066Sahrens */ 3106fa9e4066Sahrens 3107fa9e4066Sahrens if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 3108fa9e4066Sahrens goto out; 3109fa9e4066Sahrens 3110fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3111fa9e4066Sahrens /* 3112fa9e4066Sahrens * Check to make sure rename is valid. 3113fa9e4066Sahrens * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 3114fa9e4066Sahrens */ 3115fa9e4066Sahrens if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 3116fa9e4066Sahrens goto out; 3117fa9e4066Sahrens } 3118fa9e4066Sahrens 3119fa9e4066Sahrens /* 3120fa9e4066Sahrens * Does target exist? 3121fa9e4066Sahrens */ 3122fa9e4066Sahrens if (tzp) { 3123fa9e4066Sahrens /* 3124fa9e4066Sahrens * Source and target must be the same type. 3125fa9e4066Sahrens */ 3126fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3127fa9e4066Sahrens if (ZTOV(tzp)->v_type != VDIR) { 3128fa9e4066Sahrens error = ENOTDIR; 3129fa9e4066Sahrens goto out; 3130fa9e4066Sahrens } 3131fa9e4066Sahrens } else { 3132fa9e4066Sahrens if (ZTOV(tzp)->v_type == VDIR) { 3133fa9e4066Sahrens error = EISDIR; 3134fa9e4066Sahrens goto out; 3135fa9e4066Sahrens } 3136fa9e4066Sahrens } 3137fa9e4066Sahrens /* 3138fa9e4066Sahrens * POSIX dictates that when the source and target 3139fa9e4066Sahrens * entries refer to the same file object, rename 3140fa9e4066Sahrens * must do nothing and exit without error. 3141fa9e4066Sahrens */ 3142fa9e4066Sahrens if (szp->z_id == tzp->z_id) { 3143fa9e4066Sahrens error = 0; 3144fa9e4066Sahrens goto out; 3145fa9e4066Sahrens } 3146fa9e4066Sahrens } 3147fa9e4066Sahrens 3148da6c28aaSamw vnevent_rename_src(ZTOV(szp), sdvp, snm, ct); 3149fa9e4066Sahrens if (tzp) 3150da6c28aaSamw vnevent_rename_dest(ZTOV(tzp), tdvp, tnm, ct); 3151df2381bfSpraks 3152df2381bfSpraks /* 3153df2381bfSpraks * notify the target directory if it is not the same 3154df2381bfSpraks * as source directory. 3155df2381bfSpraks */ 3156df2381bfSpraks if (tdvp != sdvp) { 3157da6c28aaSamw vnevent_rename_dest_dir(tdvp, ct); 3158df2381bfSpraks } 3159fa9e4066Sahrens 3160fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3161fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */ 3162fa9e4066Sahrens dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */ 3163ea8dc4b6Seschrock dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); 3164ea8dc4b6Seschrock dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); 3165ea8dc4b6Seschrock if (sdzp != tdzp) 3166fa9e4066Sahrens dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */ 3167ea8dc4b6Seschrock if (tzp) 3168ea8dc4b6Seschrock dmu_tx_hold_bonus(tx, tzp->z_id); /* parent changes */ 3169893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 3170fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 3171fa9e4066Sahrens if (error) { 3172fa9e4066Sahrens if (zl != NULL) 3173fa9e4066Sahrens zfs_rename_unlock(&zl); 3174fa9e4066Sahrens zfs_dirent_unlock(sdl); 3175fa9e4066Sahrens zfs_dirent_unlock(tdl); 3176fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3177fa9e4066Sahrens if (tzp) 3178fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3179fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 31808a2f1b91Sahrens dmu_tx_wait(tx); 31818a2f1b91Sahrens dmu_tx_abort(tx); 3182fa9e4066Sahrens goto top; 3183fa9e4066Sahrens } 31848a2f1b91Sahrens dmu_tx_abort(tx); 3185fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3186fa9e4066Sahrens return (error); 3187fa9e4066Sahrens } 3188fa9e4066Sahrens 3189fa9e4066Sahrens if (tzp) /* Attempt to remove the existing target */ 3190da6c28aaSamw error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL); 3191fa9e4066Sahrens 3192fa9e4066Sahrens if (error == 0) { 3193fa9e4066Sahrens error = zfs_link_create(tdl, szp, tx, ZRENAMING); 3194fa9e4066Sahrens if (error == 0) { 3195da6c28aaSamw szp->z_phys->zp_flags |= ZFS_AV_MODIFIED; 3196da6c28aaSamw 3197fa9e4066Sahrens error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 3198fa9e4066Sahrens ASSERT(error == 0); 3199da6c28aaSamw 3200da6c28aaSamw zfs_log_rename(zilog, tx, 3201da6c28aaSamw TX_RENAME | (flags & FIGNORECASE ? TX_CI : 0), 3202da6c28aaSamw sdzp, sdl->dl_name, tdzp, tdl->dl_name, szp); 320351ece835Seschrock 320451ece835Seschrock /* Update path information for the target vnode */ 320551ece835Seschrock vn_renamepath(tdvp, ZTOV(szp), tnm, strlen(tnm)); 3206fa9e4066Sahrens } 3207fa9e4066Sahrens } 3208fa9e4066Sahrens 3209fa9e4066Sahrens dmu_tx_commit(tx); 3210fa9e4066Sahrens out: 3211fa9e4066Sahrens if (zl != NULL) 3212fa9e4066Sahrens zfs_rename_unlock(&zl); 3213fa9e4066Sahrens 3214fa9e4066Sahrens zfs_dirent_unlock(sdl); 3215fa9e4066Sahrens zfs_dirent_unlock(tdl); 3216fa9e4066Sahrens 3217fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3218fa9e4066Sahrens if (tzp) 3219fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3220fa9e4066Sahrens 3221fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3222fa9e4066Sahrens return (error); 3223fa9e4066Sahrens } 3224fa9e4066Sahrens 3225fa9e4066Sahrens /* 3226fa9e4066Sahrens * Insert the indicated symbolic reference entry into the directory. 3227fa9e4066Sahrens * 3228fa9e4066Sahrens * IN: dvp - Directory to contain new symbolic link. 3229fa9e4066Sahrens * link - Name for new symlink entry. 3230fa9e4066Sahrens * vap - Attributes of new entry. 3231fa9e4066Sahrens * target - Target path of new symlink. 3232fa9e4066Sahrens * cr - credentials of caller. 3233da6c28aaSamw * ct - caller context 3234da6c28aaSamw * flags - case flags 3235fa9e4066Sahrens * 3236fa9e4066Sahrens * RETURN: 0 if success 3237fa9e4066Sahrens * error code if failure 3238fa9e4066Sahrens * 3239fa9e4066Sahrens * Timestamps: 3240fa9e4066Sahrens * dvp - ctime|mtime updated 3241fa9e4066Sahrens */ 3242da6c28aaSamw /*ARGSUSED*/ 3243fa9e4066Sahrens static int 3244da6c28aaSamw zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr, 3245da6c28aaSamw caller_context_t *ct, int flags) 3246fa9e4066Sahrens { 3247fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 3248fa9e4066Sahrens zfs_dirlock_t *dl; 3249fa9e4066Sahrens dmu_tx_t *tx; 3250fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3251f18faf3fSek zilog_t *zilog; 3252fa9e4066Sahrens int len = strlen(link); 3253fa9e4066Sahrens int error; 3254da6c28aaSamw int zflg = ZNEW; 3255da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 3256fa9e4066Sahrens 3257fa9e4066Sahrens ASSERT(vap->va_type == VLNK); 3258fa9e4066Sahrens 32593cb34c60Sahrens ZFS_ENTER(zfsvfs); 32603cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3261f18faf3fSek zilog = zfsvfs->z_log; 3262da6c28aaSamw 3263de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 3264da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3265da6c28aaSamw ZFS_EXIT(zfsvfs); 3266da6c28aaSamw return (EILSEQ); 3267da6c28aaSamw } 3268da6c28aaSamw if (flags & FIGNORECASE) 3269da6c28aaSamw zflg |= ZCILOOK; 3270fa9e4066Sahrens top: 3271da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3272fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3273fa9e4066Sahrens return (error); 3274fa9e4066Sahrens } 3275fa9e4066Sahrens 3276fa9e4066Sahrens if (len > MAXPATHLEN) { 3277fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3278fa9e4066Sahrens return (ENAMETOOLONG); 3279fa9e4066Sahrens } 3280fa9e4066Sahrens 3281fa9e4066Sahrens /* 3282fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3283fa9e4066Sahrens */ 3284da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL); 3285da6c28aaSamw if (error) { 3286fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3287fa9e4066Sahrens return (error); 3288fa9e4066Sahrens } 3289fa9e4066Sahrens 3290fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3291fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 3292fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 3293ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 3294fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 3295fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE); 32964c841f60Smarks if (IS_EPHEMERAL(crgetuid(cr)) || IS_EPHEMERAL(crgetgid(cr))) { 32974c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 32984c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 32994c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 33004c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 33014c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); 33024c841f60Smarks } else { 33034c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 33044c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 33054c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 33064c841f60Smarks } 3307da6c28aaSamw } 3308fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 3309fa9e4066Sahrens if (error) { 3310fa9e4066Sahrens zfs_dirent_unlock(dl); 3311fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 33128a2f1b91Sahrens dmu_tx_wait(tx); 33138a2f1b91Sahrens dmu_tx_abort(tx); 3314fa9e4066Sahrens goto top; 3315fa9e4066Sahrens } 33168a2f1b91Sahrens dmu_tx_abort(tx); 3317fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3318fa9e4066Sahrens return (error); 3319fa9e4066Sahrens } 3320fa9e4066Sahrens 3321fa9e4066Sahrens dmu_buf_will_dirty(dzp->z_dbuf, tx); 3322fa9e4066Sahrens 3323fa9e4066Sahrens /* 3324fa9e4066Sahrens * Create a new object for the symlink. 3325fa9e4066Sahrens * Put the link content into bonus buffer if it will fit; 3326fa9e4066Sahrens * otherwise, store it just like any other file data. 3327fa9e4066Sahrens */ 3328fa9e4066Sahrens if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) { 33294ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, len, NULL, &fuidp); 3330fa9e4066Sahrens if (len != 0) 3331fa9e4066Sahrens bcopy(link, zp->z_phys + 1, len); 3332fa9e4066Sahrens } else { 3333fa9e4066Sahrens dmu_buf_t *dbp; 3334104e2ed7Sperrin 33354ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, NULL, &fuidp); 3336104e2ed7Sperrin /* 3337104e2ed7Sperrin * Nothing can access the znode yet so no locking needed 3338104e2ed7Sperrin * for growing the znode's blocksize. 3339104e2ed7Sperrin */ 3340104e2ed7Sperrin zfs_grow_blocksize(zp, len, tx); 3341fa9e4066Sahrens 33424ccbb6e7Sahrens VERIFY(0 == dmu_buf_hold(zfsvfs->z_os, 33434ccbb6e7Sahrens zp->z_id, 0, FTAG, &dbp)); 3344fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 3345fa9e4066Sahrens 3346fa9e4066Sahrens ASSERT3U(len, <=, dbp->db_size); 3347fa9e4066Sahrens bcopy(link, dbp->db_data, len); 3348ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3349fa9e4066Sahrens } 3350fa9e4066Sahrens zp->z_phys->zp_size = len; 3351fa9e4066Sahrens 3352fa9e4066Sahrens /* 3353fa9e4066Sahrens * Insert the new object into the directory. 3354fa9e4066Sahrens */ 3355fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 3356fa9e4066Sahrens out: 3357da6c28aaSamw if (error == 0) { 3358da6c28aaSamw uint64_t txtype = TX_SYMLINK; 3359da6c28aaSamw if (flags & FIGNORECASE) 3360da6c28aaSamw txtype |= TX_CI; 3361da6c28aaSamw zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link); 3362da6c28aaSamw } 3363da6c28aaSamw if (fuidp) 3364da6c28aaSamw zfs_fuid_info_free(fuidp); 3365fa9e4066Sahrens 3366fa9e4066Sahrens dmu_tx_commit(tx); 3367fa9e4066Sahrens 3368fa9e4066Sahrens zfs_dirent_unlock(dl); 3369fa9e4066Sahrens 3370fa9e4066Sahrens VN_RELE(ZTOV(zp)); 3371fa9e4066Sahrens 3372fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3373fa9e4066Sahrens return (error); 3374fa9e4066Sahrens } 3375fa9e4066Sahrens 3376fa9e4066Sahrens /* 3377fa9e4066Sahrens * Return, in the buffer contained in the provided uio structure, 3378fa9e4066Sahrens * the symbolic path referred to by vp. 3379fa9e4066Sahrens * 3380fa9e4066Sahrens * IN: vp - vnode of symbolic link. 3381fa9e4066Sahrens * uoip - structure to contain the link path. 3382fa9e4066Sahrens * cr - credentials of caller. 3383da6c28aaSamw * ct - caller context 3384fa9e4066Sahrens * 3385fa9e4066Sahrens * OUT: uio - structure to contain the link path. 3386fa9e4066Sahrens * 3387fa9e4066Sahrens * RETURN: 0 if success 3388fa9e4066Sahrens * error code if failure 3389fa9e4066Sahrens * 3390fa9e4066Sahrens * Timestamps: 3391fa9e4066Sahrens * vp - atime updated 3392fa9e4066Sahrens */ 3393fa9e4066Sahrens /* ARGSUSED */ 3394fa9e4066Sahrens static int 3395da6c28aaSamw zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct) 3396fa9e4066Sahrens { 3397fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3398fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3399fa9e4066Sahrens size_t bufsz; 3400fa9e4066Sahrens int error; 3401fa9e4066Sahrens 34023cb34c60Sahrens ZFS_ENTER(zfsvfs); 34033cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3404fa9e4066Sahrens 3405fa9e4066Sahrens bufsz = (size_t)zp->z_phys->zp_size; 3406fa9e4066Sahrens if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) { 3407fa9e4066Sahrens error = uiomove(zp->z_phys + 1, 3408fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3409fa9e4066Sahrens } else { 3410ea8dc4b6Seschrock dmu_buf_t *dbp; 3411ea8dc4b6Seschrock error = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0, FTAG, &dbp); 3412ea8dc4b6Seschrock if (error) { 3413fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3414fa9e4066Sahrens return (error); 3415fa9e4066Sahrens } 3416fa9e4066Sahrens error = uiomove(dbp->db_data, 3417fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3418ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3419fa9e4066Sahrens } 3420fa9e4066Sahrens 3421fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 3422fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3423fa9e4066Sahrens return (error); 3424fa9e4066Sahrens } 3425fa9e4066Sahrens 3426fa9e4066Sahrens /* 3427fa9e4066Sahrens * Insert a new entry into directory tdvp referencing svp. 3428fa9e4066Sahrens * 3429fa9e4066Sahrens * IN: tdvp - Directory to contain new entry. 3430fa9e4066Sahrens * svp - vnode of new entry. 3431fa9e4066Sahrens * name - name of new entry. 3432fa9e4066Sahrens * cr - credentials of caller. 3433da6c28aaSamw * ct - caller context 3434fa9e4066Sahrens * 3435fa9e4066Sahrens * RETURN: 0 if success 3436fa9e4066Sahrens * error code if failure 3437fa9e4066Sahrens * 3438fa9e4066Sahrens * Timestamps: 3439fa9e4066Sahrens * tdvp - ctime|mtime updated 3440fa9e4066Sahrens * svp - ctime updated 3441fa9e4066Sahrens */ 3442fa9e4066Sahrens /* ARGSUSED */ 3443fa9e4066Sahrens static int 3444da6c28aaSamw zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr, 3445da6c28aaSamw caller_context_t *ct, int flags) 3446fa9e4066Sahrens { 3447fa9e4066Sahrens znode_t *dzp = VTOZ(tdvp); 3448fa9e4066Sahrens znode_t *tzp, *szp; 3449fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3450f18faf3fSek zilog_t *zilog; 3451fa9e4066Sahrens zfs_dirlock_t *dl; 3452fa9e4066Sahrens dmu_tx_t *tx; 3453fa9e4066Sahrens vnode_t *realvp; 3454fa9e4066Sahrens int error; 3455da6c28aaSamw int zf = ZNEW; 3456da6c28aaSamw uid_t owner; 3457fa9e4066Sahrens 3458fa9e4066Sahrens ASSERT(tdvp->v_type == VDIR); 3459fa9e4066Sahrens 34603cb34c60Sahrens ZFS_ENTER(zfsvfs); 34613cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3462f18faf3fSek zilog = zfsvfs->z_log; 3463fa9e4066Sahrens 3464da6c28aaSamw if (VOP_REALVP(svp, &realvp, ct) == 0) 3465fa9e4066Sahrens svp = realvp; 3466fa9e4066Sahrens 3467fa9e4066Sahrens if (svp->v_vfsp != tdvp->v_vfsp) { 3468fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3469fa9e4066Sahrens return (EXDEV); 3470fa9e4066Sahrens } 34713cb34c60Sahrens szp = VTOZ(svp); 34723cb34c60Sahrens ZFS_VERIFY_ZP(szp); 3473fa9e4066Sahrens 3474de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, 3475da6c28aaSamw strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3476da6c28aaSamw ZFS_EXIT(zfsvfs); 3477da6c28aaSamw return (EILSEQ); 3478da6c28aaSamw } 3479da6c28aaSamw if (flags & FIGNORECASE) 3480da6c28aaSamw zf |= ZCILOOK; 3481da6c28aaSamw 3482fa9e4066Sahrens top: 3483fa9e4066Sahrens /* 3484fa9e4066Sahrens * We do not support links between attributes and non-attributes 3485fa9e4066Sahrens * because of the potential security risk of creating links 3486fa9e4066Sahrens * into "normal" file space in order to circumvent restrictions 3487fa9e4066Sahrens * imposed in attribute space. 3488fa9e4066Sahrens */ 3489fa9e4066Sahrens if ((szp->z_phys->zp_flags & ZFS_XATTR) != 3490fa9e4066Sahrens (dzp->z_phys->zp_flags & ZFS_XATTR)) { 3491fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3492fa9e4066Sahrens return (EINVAL); 3493fa9e4066Sahrens } 3494fa9e4066Sahrens 3495fa9e4066Sahrens /* 3496fa9e4066Sahrens * POSIX dictates that we return EPERM here. 3497fa9e4066Sahrens * Better choices include ENOTSUP or EISDIR. 3498fa9e4066Sahrens */ 3499fa9e4066Sahrens if (svp->v_type == VDIR) { 3500fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3501fa9e4066Sahrens return (EPERM); 3502fa9e4066Sahrens } 3503fa9e4066Sahrens 3504e0d35c44Smarks owner = zfs_fuid_map_id(zfsvfs, szp->z_phys->zp_uid, cr, ZFS_OWNER); 3505da6c28aaSamw if (owner != crgetuid(cr) && 3506fa9e4066Sahrens secpolicy_basic_link(cr) != 0) { 3507fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3508fa9e4066Sahrens return (EPERM); 3509fa9e4066Sahrens } 3510fa9e4066Sahrens 3511da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3512fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3513fa9e4066Sahrens return (error); 3514fa9e4066Sahrens } 3515fa9e4066Sahrens 3516fa9e4066Sahrens /* 3517fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3518fa9e4066Sahrens */ 3519da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &tzp, zf, NULL, NULL); 3520da6c28aaSamw if (error) { 3521fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3522fa9e4066Sahrens return (error); 3523fa9e4066Sahrens } 3524fa9e4066Sahrens 3525fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3526fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); 3527ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 3528fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 3529fa9e4066Sahrens if (error) { 3530fa9e4066Sahrens zfs_dirent_unlock(dl); 3531fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 35328a2f1b91Sahrens dmu_tx_wait(tx); 35338a2f1b91Sahrens dmu_tx_abort(tx); 3534fa9e4066Sahrens goto top; 3535fa9e4066Sahrens } 35368a2f1b91Sahrens dmu_tx_abort(tx); 3537fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3538fa9e4066Sahrens return (error); 3539fa9e4066Sahrens } 3540fa9e4066Sahrens 3541fa9e4066Sahrens error = zfs_link_create(dl, szp, tx, 0); 3542fa9e4066Sahrens 3543da6c28aaSamw if (error == 0) { 3544da6c28aaSamw uint64_t txtype = TX_LINK; 3545da6c28aaSamw if (flags & FIGNORECASE) 3546da6c28aaSamw txtype |= TX_CI; 3547da6c28aaSamw zfs_log_link(zilog, tx, txtype, dzp, szp, name); 3548da6c28aaSamw } 3549fa9e4066Sahrens 3550fa9e4066Sahrens dmu_tx_commit(tx); 3551fa9e4066Sahrens 3552fa9e4066Sahrens zfs_dirent_unlock(dl); 3553fa9e4066Sahrens 3554df2381bfSpraks if (error == 0) { 3555da6c28aaSamw vnevent_link(svp, ct); 3556df2381bfSpraks } 3557df2381bfSpraks 3558fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3559fa9e4066Sahrens return (error); 3560fa9e4066Sahrens } 3561fa9e4066Sahrens 3562fa9e4066Sahrens /* 3563fa9e4066Sahrens * zfs_null_putapage() is used when the file system has been force 3564fa9e4066Sahrens * unmounted. It just drops the pages. 3565fa9e4066Sahrens */ 3566fa9e4066Sahrens /* ARGSUSED */ 3567fa9e4066Sahrens static int 3568fa9e4066Sahrens zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3569fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3570fa9e4066Sahrens { 3571fa9e4066Sahrens pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 3572fa9e4066Sahrens return (0); 3573fa9e4066Sahrens } 3574fa9e4066Sahrens 357544eda4d7Smaybee /* 357644eda4d7Smaybee * Push a page out to disk, klustering if possible. 357744eda4d7Smaybee * 357844eda4d7Smaybee * IN: vp - file to push page to. 357944eda4d7Smaybee * pp - page to push. 358044eda4d7Smaybee * flags - additional flags. 358144eda4d7Smaybee * cr - credentials of caller. 358244eda4d7Smaybee * 358344eda4d7Smaybee * OUT: offp - start of range pushed. 358444eda4d7Smaybee * lenp - len of range pushed. 358544eda4d7Smaybee * 358644eda4d7Smaybee * RETURN: 0 if success 358744eda4d7Smaybee * error code if failure 358844eda4d7Smaybee * 358944eda4d7Smaybee * NOTE: callers must have locked the page to be pushed. On 359044eda4d7Smaybee * exit, the page (and all other pages in the kluster) must be 359144eda4d7Smaybee * unlocked. 359244eda4d7Smaybee */ 3593fa9e4066Sahrens /* ARGSUSED */ 3594fa9e4066Sahrens static int 3595fa9e4066Sahrens zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3596fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3597fa9e4066Sahrens { 3598fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3599fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3600fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 3601fa9e4066Sahrens dmu_tx_t *tx; 3602104e2ed7Sperrin rl_t *rl; 360344eda4d7Smaybee u_offset_t off, koff; 360444eda4d7Smaybee size_t len, klen; 3605f4d2e9e6Smaybee uint64_t filesz; 3606fa9e4066Sahrens int err; 3607fa9e4066Sahrens 3608f4d2e9e6Smaybee filesz = zp->z_phys->zp_size; 3609fa9e4066Sahrens off = pp->p_offset; 361044eda4d7Smaybee len = PAGESIZE; 361144eda4d7Smaybee /* 361244eda4d7Smaybee * If our blocksize is bigger than the page size, try to kluster 361344eda4d7Smaybee * muiltiple pages so that we write a full block (thus avoiding 361444eda4d7Smaybee * a read-modify-write). 361544eda4d7Smaybee */ 3616f4d2e9e6Smaybee if (off < filesz && zp->z_blksz > PAGESIZE) { 361744eda4d7Smaybee if (!ISP2(zp->z_blksz)) { 361844eda4d7Smaybee /* Only one block in the file. */ 361944eda4d7Smaybee klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 362044eda4d7Smaybee koff = 0; 362144eda4d7Smaybee } else { 362244eda4d7Smaybee klen = zp->z_blksz; 362344eda4d7Smaybee koff = P2ALIGN(off, (u_offset_t)klen); 362444eda4d7Smaybee } 362544eda4d7Smaybee ASSERT(koff <= filesz); 362644eda4d7Smaybee if (koff + klen > filesz) 362744eda4d7Smaybee klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE); 362844eda4d7Smaybee pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); 362944eda4d7Smaybee } 363044eda4d7Smaybee ASSERT3U(btop(len), ==, btopr(len)); 363144eda4d7Smaybee top: 363244eda4d7Smaybee rl = zfs_range_lock(zp, off, len, RL_WRITER); 3633dd6ef538Smaybee /* 3634dd6ef538Smaybee * Can't push pages past end-of-file. 3635dd6ef538Smaybee */ 3636f4d2e9e6Smaybee filesz = zp->z_phys->zp_size; 3637f4d2e9e6Smaybee if (off >= filesz) { 3638f4d2e9e6Smaybee /* ignore all pages */ 363944eda4d7Smaybee err = 0; 364044eda4d7Smaybee goto out; 3641f4d2e9e6Smaybee } else if (off + len > filesz) { 3642f4d2e9e6Smaybee int npages = btopr(filesz - off); 364344eda4d7Smaybee page_t *trunc; 364444eda4d7Smaybee 364544eda4d7Smaybee page_list_break(&pp, &trunc, npages); 3646f4d2e9e6Smaybee /* ignore pages past end of file */ 364744eda4d7Smaybee if (trunc) 3648f4d2e9e6Smaybee pvn_write_done(trunc, flags); 3649f4d2e9e6Smaybee len = filesz - off; 3650dd6ef538Smaybee } 3651fa9e4066Sahrens 3652fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3653fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, off, len); 3654fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3655fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 3656fa9e4066Sahrens if (err != 0) { 3657fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 365844eda4d7Smaybee zfs_range_unlock(rl); 36598a2f1b91Sahrens dmu_tx_wait(tx); 36608a2f1b91Sahrens dmu_tx_abort(tx); 366144eda4d7Smaybee err = 0; 3662fa9e4066Sahrens goto top; 3663fa9e4066Sahrens } 36648a2f1b91Sahrens dmu_tx_abort(tx); 3665fa9e4066Sahrens goto out; 3666fa9e4066Sahrens } 3667fa9e4066Sahrens 366844eda4d7Smaybee if (zp->z_blksz <= PAGESIZE) { 36690fab61baSJonathan W Adams caddr_t va = zfs_map_page(pp, S_READ); 367044eda4d7Smaybee ASSERT3U(len, <=, PAGESIZE); 367144eda4d7Smaybee dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 36720fab61baSJonathan W Adams zfs_unmap_page(pp, va); 367344eda4d7Smaybee } else { 367444eda4d7Smaybee err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 367544eda4d7Smaybee } 3676fa9e4066Sahrens 367744eda4d7Smaybee if (err == 0) { 367844eda4d7Smaybee zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 3679feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, off, len, 0); 368044eda4d7Smaybee dmu_tx_commit(tx); 368144eda4d7Smaybee } 3682fa9e4066Sahrens 368344eda4d7Smaybee out: 3684c5c6ffa0Smaybee zfs_range_unlock(rl); 3685f4d2e9e6Smaybee pvn_write_done(pp, (err ? B_ERROR : 0) | flags); 3686fa9e4066Sahrens if (offp) 3687fa9e4066Sahrens *offp = off; 3688fa9e4066Sahrens if (lenp) 3689fa9e4066Sahrens *lenp = len; 3690fa9e4066Sahrens 3691fa9e4066Sahrens return (err); 3692fa9e4066Sahrens } 3693fa9e4066Sahrens 3694fa9e4066Sahrens /* 3695fa9e4066Sahrens * Copy the portion of the file indicated from pages into the file. 3696fa9e4066Sahrens * The pages are stored in a page list attached to the files vnode. 3697fa9e4066Sahrens * 3698fa9e4066Sahrens * IN: vp - vnode of file to push page data to. 3699fa9e4066Sahrens * off - position in file to put data. 3700fa9e4066Sahrens * len - amount of data to write. 3701fa9e4066Sahrens * flags - flags to control the operation. 3702fa9e4066Sahrens * cr - credentials of caller. 3703da6c28aaSamw * ct - caller context. 3704fa9e4066Sahrens * 3705fa9e4066Sahrens * RETURN: 0 if success 3706fa9e4066Sahrens * error code if failure 3707fa9e4066Sahrens * 3708fa9e4066Sahrens * Timestamps: 3709fa9e4066Sahrens * vp - ctime|mtime updated 3710fa9e4066Sahrens */ 3711da6c28aaSamw /*ARGSUSED*/ 3712fa9e4066Sahrens static int 3713da6c28aaSamw zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr, 3714da6c28aaSamw caller_context_t *ct) 3715fa9e4066Sahrens { 3716fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3717fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3718fa9e4066Sahrens page_t *pp; 3719fa9e4066Sahrens size_t io_len; 3720fa9e4066Sahrens u_offset_t io_off; 3721104e2ed7Sperrin uint64_t filesz; 3722fa9e4066Sahrens int error = 0; 3723fa9e4066Sahrens 37243cb34c60Sahrens ZFS_ENTER(zfsvfs); 37253cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3726fa9e4066Sahrens 3727fa9e4066Sahrens if (len == 0) { 3728fa9e4066Sahrens /* 3729fa9e4066Sahrens * Search the entire vp list for pages >= off. 3730fa9e4066Sahrens */ 3731fa9e4066Sahrens error = pvn_vplist_dirty(vp, (u_offset_t)off, zfs_putapage, 3732fa9e4066Sahrens flags, cr); 3733fe9cf88cSperrin goto out; 3734fa9e4066Sahrens } 3735fa9e4066Sahrens 3736104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 3737104e2ed7Sperrin if (off > filesz) { 3738fa9e4066Sahrens /* past end of file */ 3739fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3740fa9e4066Sahrens return (0); 3741fa9e4066Sahrens } 3742fa9e4066Sahrens 3743104e2ed7Sperrin len = MIN(len, filesz - off); 3744fa9e4066Sahrens 3745fe9cf88cSperrin for (io_off = off; io_off < off + len; io_off += io_len) { 3746fa9e4066Sahrens if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 3747104e2ed7Sperrin pp = page_lookup(vp, io_off, 3748ecb72030Sperrin (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); 3749fa9e4066Sahrens } else { 3750fa9e4066Sahrens pp = page_lookup_nowait(vp, io_off, 3751ecb72030Sperrin (flags & B_FREE) ? SE_EXCL : SE_SHARED); 3752fa9e4066Sahrens } 3753fa9e4066Sahrens 3754fa9e4066Sahrens if (pp != NULL && pvn_getdirty(pp, flags)) { 3755fa9e4066Sahrens int err; 3756fa9e4066Sahrens 3757fa9e4066Sahrens /* 3758fa9e4066Sahrens * Found a dirty page to push 3759fa9e4066Sahrens */ 3760104e2ed7Sperrin err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 3761104e2ed7Sperrin if (err) 3762fa9e4066Sahrens error = err; 3763fa9e4066Sahrens } else { 3764fa9e4066Sahrens io_len = PAGESIZE; 3765fa9e4066Sahrens } 3766fa9e4066Sahrens } 3767fe9cf88cSperrin out: 3768b19a79ecSperrin if ((flags & B_ASYNC) == 0) 3769b19a79ecSperrin zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id); 3770fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3771fa9e4066Sahrens return (error); 3772fa9e4066Sahrens } 3773fa9e4066Sahrens 3774da6c28aaSamw /*ARGSUSED*/ 3775fa9e4066Sahrens void 3776da6c28aaSamw zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 3777fa9e4066Sahrens { 3778fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3779fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3780fa9e4066Sahrens int error; 3781fa9e4066Sahrens 3782f18faf3fSek rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 37834ccbb6e7Sahrens if (zp->z_dbuf == NULL) { 37844ccbb6e7Sahrens /* 3785874395d5Smaybee * The fs has been unmounted, or we did a 3786874395d5Smaybee * suspend/resume and this file no longer exists. 37874ccbb6e7Sahrens */ 3788fa9e4066Sahrens if (vn_has_cached_data(vp)) { 3789fa9e4066Sahrens (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, 3790fa9e4066Sahrens B_INVAL, cr); 3791fa9e4066Sahrens } 3792fa9e4066Sahrens 3793ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 3794fa9e4066Sahrens vp->v_count = 0; /* count arrives as 1 */ 37954ccbb6e7Sahrens mutex_exit(&zp->z_lock); 3796f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 3797874395d5Smaybee zfs_znode_free(zp); 3798fa9e4066Sahrens return; 3799fa9e4066Sahrens } 3800fa9e4066Sahrens 3801fa9e4066Sahrens /* 3802fa9e4066Sahrens * Attempt to push any data in the page cache. If this fails 3803fa9e4066Sahrens * we will get kicked out later in zfs_zinactive(). 3804fa9e4066Sahrens */ 38058afd4dd6Sperrin if (vn_has_cached_data(vp)) { 38068afd4dd6Sperrin (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, 38078afd4dd6Sperrin cr); 38088afd4dd6Sperrin } 3809fa9e4066Sahrens 3810893a6d32Sahrens if (zp->z_atime_dirty && zp->z_unlinked == 0) { 3811fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 3812fa9e4066Sahrens 3813fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3814fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 3815fa9e4066Sahrens if (error) { 3816fa9e4066Sahrens dmu_tx_abort(tx); 3817fa9e4066Sahrens } else { 3818fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 3819fa9e4066Sahrens mutex_enter(&zp->z_lock); 3820fa9e4066Sahrens zp->z_atime_dirty = 0; 3821fa9e4066Sahrens mutex_exit(&zp->z_lock); 3822fa9e4066Sahrens dmu_tx_commit(tx); 3823fa9e4066Sahrens } 3824fa9e4066Sahrens } 3825fa9e4066Sahrens 3826fa9e4066Sahrens zfs_zinactive(zp); 3827f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 3828fa9e4066Sahrens } 3829fa9e4066Sahrens 3830fa9e4066Sahrens /* 3831fa9e4066Sahrens * Bounds-check the seek operation. 3832fa9e4066Sahrens * 3833fa9e4066Sahrens * IN: vp - vnode seeking within 3834fa9e4066Sahrens * ooff - old file offset 3835fa9e4066Sahrens * noffp - pointer to new file offset 3836da6c28aaSamw * ct - caller context 3837fa9e4066Sahrens * 3838fa9e4066Sahrens * RETURN: 0 if success 3839fa9e4066Sahrens * EINVAL if new offset invalid 3840fa9e4066Sahrens */ 3841fa9e4066Sahrens /* ARGSUSED */ 3842fa9e4066Sahrens static int 3843da6c28aaSamw zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, 3844da6c28aaSamw caller_context_t *ct) 3845fa9e4066Sahrens { 3846fa9e4066Sahrens if (vp->v_type == VDIR) 3847fa9e4066Sahrens return (0); 3848fa9e4066Sahrens return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 3849fa9e4066Sahrens } 3850fa9e4066Sahrens 3851fa9e4066Sahrens /* 3852fa9e4066Sahrens * Pre-filter the generic locking function to trap attempts to place 3853fa9e4066Sahrens * a mandatory lock on a memory mapped file. 3854fa9e4066Sahrens */ 3855fa9e4066Sahrens static int 3856fa9e4066Sahrens zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 3857da6c28aaSamw flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct) 3858fa9e4066Sahrens { 3859fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3860fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3861fa9e4066Sahrens int error; 3862fa9e4066Sahrens 38633cb34c60Sahrens ZFS_ENTER(zfsvfs); 38643cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3865fa9e4066Sahrens 3866fa9e4066Sahrens /* 3867ea8dc4b6Seschrock * We are following the UFS semantics with respect to mapcnt 3868ea8dc4b6Seschrock * here: If we see that the file is mapped already, then we will 3869ea8dc4b6Seschrock * return an error, but we don't worry about races between this 3870ea8dc4b6Seschrock * function and zfs_map(). 3871fa9e4066Sahrens */ 3872ea8dc4b6Seschrock if (zp->z_mapcnt > 0 && MANDMODE((mode_t)zp->z_phys->zp_mode)) { 3873fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3874fa9e4066Sahrens return (EAGAIN); 3875fa9e4066Sahrens } 3876da6c28aaSamw error = fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct); 3877fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3878fa9e4066Sahrens return (error); 3879fa9e4066Sahrens } 3880fa9e4066Sahrens 3881fa9e4066Sahrens /* 3882fa9e4066Sahrens * If we can't find a page in the cache, we will create a new page 3883fa9e4066Sahrens * and fill it with file data. For efficiency, we may try to fill 3884104e2ed7Sperrin * multiple pages at once (klustering). 3885fa9e4066Sahrens */ 3886fa9e4066Sahrens static int 3887fa9e4066Sahrens zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 3888fa9e4066Sahrens caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 3889fa9e4066Sahrens { 3890fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3891fa9e4066Sahrens page_t *pp, *cur_pp; 3892fa9e4066Sahrens objset_t *os = zp->z_zfsvfs->z_os; 3893fa9e4066Sahrens caddr_t va; 3894fa9e4066Sahrens u_offset_t io_off, total; 3895fa9e4066Sahrens uint64_t oid = zp->z_id; 3896fa9e4066Sahrens size_t io_len; 3897104e2ed7Sperrin uint64_t filesz; 3898fa9e4066Sahrens int err; 3899fa9e4066Sahrens 3900fa9e4066Sahrens /* 3901fa9e4066Sahrens * If we are only asking for a single page don't bother klustering. 3902fa9e4066Sahrens */ 3903104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 390444eda4d7Smaybee if (off >= filesz) 390544eda4d7Smaybee return (EFAULT); 390644eda4d7Smaybee if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 3907fa9e4066Sahrens io_off = off; 3908fa9e4066Sahrens io_len = PAGESIZE; 3909fa9e4066Sahrens pp = page_create_va(vp, io_off, io_len, PG_WAIT, seg, addr); 3910fa9e4066Sahrens } else { 3911fa9e4066Sahrens /* 3912fa9e4066Sahrens * Try to fill a kluster of pages (a blocks worth). 3913fa9e4066Sahrens */ 3914fa9e4066Sahrens size_t klen; 3915fa9e4066Sahrens u_offset_t koff; 3916fa9e4066Sahrens 3917fa9e4066Sahrens if (!ISP2(zp->z_blksz)) { 3918fa9e4066Sahrens /* Only one block in the file. */ 3919fa9e4066Sahrens klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 3920fa9e4066Sahrens koff = 0; 3921fa9e4066Sahrens } else { 3922574679b5Sgw /* 3923574679b5Sgw * It would be ideal to align our offset to the 3924574679b5Sgw * blocksize but doing so has resulted in some 3925574679b5Sgw * strange application crashes. For now, we 3926574679b5Sgw * leave the offset as is and only adjust the 3927574679b5Sgw * length if we are off the end of the file. 3928574679b5Sgw */ 3929574679b5Sgw koff = off; 3930fa9e4066Sahrens klen = plsz; 3931fa9e4066Sahrens } 3932dd6ef538Smaybee ASSERT(koff <= filesz); 3933dd6ef538Smaybee if (koff + klen > filesz) 3934dd6ef538Smaybee klen = P2ROUNDUP(filesz, (uint64_t)PAGESIZE) - koff; 393544eda4d7Smaybee ASSERT3U(off, >=, koff); 393644eda4d7Smaybee ASSERT3U(off, <, koff + klen); 3937fa9e4066Sahrens pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 3938ecb72030Sperrin &io_len, koff, klen, 0); 3939fa9e4066Sahrens } 3940fa9e4066Sahrens if (pp == NULL) { 3941fa9e4066Sahrens /* 3942fa9e4066Sahrens * Some other thread entered the page before us. 3943fa9e4066Sahrens * Return to zfs_getpage to retry the lookup. 3944fa9e4066Sahrens */ 3945fa9e4066Sahrens *pl = NULL; 3946fa9e4066Sahrens return (0); 3947fa9e4066Sahrens } 3948fa9e4066Sahrens 3949fa9e4066Sahrens /* 3950fa9e4066Sahrens * Fill the pages in the kluster. 3951fa9e4066Sahrens */ 3952fa9e4066Sahrens cur_pp = pp; 3953fa9e4066Sahrens for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 395444eda4d7Smaybee ASSERT3U(io_off, ==, cur_pp->p_offset); 39550fab61baSJonathan W Adams va = zfs_map_page(cur_pp, S_WRITE); 3956ea8dc4b6Seschrock err = dmu_read(os, oid, io_off, PAGESIZE, va); 39570fab61baSJonathan W Adams zfs_unmap_page(cur_pp, va); 3958fa9e4066Sahrens if (err) { 3959fa9e4066Sahrens /* On error, toss the entire kluster */ 3960fa9e4066Sahrens pvn_read_done(pp, B_ERROR); 3961b87f3af3Sperrin /* convert checksum errors into IO errors */ 3962b87f3af3Sperrin if (err == ECKSUM) 3963b87f3af3Sperrin err = EIO; 3964fa9e4066Sahrens return (err); 3965fa9e4066Sahrens } 3966fa9e4066Sahrens cur_pp = cur_pp->p_next; 3967fa9e4066Sahrens } 3968fa9e4066Sahrens out: 3969fa9e4066Sahrens /* 3970fa9e4066Sahrens * Fill in the page list array from the kluster. If 3971fa9e4066Sahrens * there are too many pages in the kluster, return 3972fa9e4066Sahrens * as many pages as possible starting from the desired 3973fa9e4066Sahrens * offset `off'. 3974fa9e4066Sahrens * NOTE: the page list will always be null terminated. 3975fa9e4066Sahrens */ 3976fa9e4066Sahrens pvn_plist_init(pp, pl, plsz, off, io_len, rw); 3977fa9e4066Sahrens 3978fa9e4066Sahrens return (0); 3979fa9e4066Sahrens } 3980fa9e4066Sahrens 3981fa9e4066Sahrens /* 3982fa9e4066Sahrens * Return pointers to the pages for the file region [off, off + len] 3983fa9e4066Sahrens * in the pl array. If plsz is greater than len, this function may 3984fa9e4066Sahrens * also return page pointers from before or after the specified 3985fa9e4066Sahrens * region (i.e. some region [off', off' + plsz]). These additional 3986fa9e4066Sahrens * pages are only returned if they are already in the cache, or were 3987fa9e4066Sahrens * created as part of a klustered read. 3988fa9e4066Sahrens * 3989fa9e4066Sahrens * IN: vp - vnode of file to get data from. 3990fa9e4066Sahrens * off - position in file to get data from. 3991fa9e4066Sahrens * len - amount of data to retrieve. 3992fa9e4066Sahrens * plsz - length of provided page list. 3993fa9e4066Sahrens * seg - segment to obtain pages for. 3994fa9e4066Sahrens * addr - virtual address of fault. 3995fa9e4066Sahrens * rw - mode of created pages. 3996fa9e4066Sahrens * cr - credentials of caller. 3997da6c28aaSamw * ct - caller context. 3998fa9e4066Sahrens * 3999fa9e4066Sahrens * OUT: protp - protection mode of created pages. 4000fa9e4066Sahrens * pl - list of pages created. 4001fa9e4066Sahrens * 4002fa9e4066Sahrens * RETURN: 0 if success 4003fa9e4066Sahrens * error code if failure 4004fa9e4066Sahrens * 4005fa9e4066Sahrens * Timestamps: 4006fa9e4066Sahrens * vp - atime updated 4007fa9e4066Sahrens */ 4008fa9e4066Sahrens /* ARGSUSED */ 4009fa9e4066Sahrens static int 4010fa9e4066Sahrens zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 4011fa9e4066Sahrens page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 4012da6c28aaSamw enum seg_rw rw, cred_t *cr, caller_context_t *ct) 4013fa9e4066Sahrens { 4014fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4015fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4016fa9e4066Sahrens page_t *pp, **pl0 = pl; 4017fe2f476aSperrin int need_unlock = 0, err = 0; 4018fe2f476aSperrin offset_t orig_off; 4019fa9e4066Sahrens 40203cb34c60Sahrens ZFS_ENTER(zfsvfs); 40213cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4022fa9e4066Sahrens 4023fa9e4066Sahrens if (protp) 4024fa9e4066Sahrens *protp = PROT_ALL; 4025fa9e4066Sahrens 4026fa9e4066Sahrens /* no faultahead (for now) */ 4027fa9e4066Sahrens if (pl == NULL) { 4028fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4029fa9e4066Sahrens return (0); 4030fa9e4066Sahrens } 4031fa9e4066Sahrens 4032fa9e4066Sahrens /* can't fault past EOF */ 4033fa9e4066Sahrens if (off >= zp->z_phys->zp_size) { 4034fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4035fa9e4066Sahrens return (EFAULT); 4036fa9e4066Sahrens } 4037fe2f476aSperrin orig_off = off; 4038fa9e4066Sahrens 4039fa9e4066Sahrens /* 4040fa9e4066Sahrens * If we already own the lock, then we must be page faulting 4041fa9e4066Sahrens * in the middle of a write to this file (i.e., we are writing 4042fa9e4066Sahrens * to this file using data from a mapped region of the file). 4043fa9e4066Sahrens */ 4044fe2f476aSperrin if (rw_owner(&zp->z_map_lock) != curthread) { 4045fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 4046fa9e4066Sahrens need_unlock = TRUE; 4047fa9e4066Sahrens } 4048fa9e4066Sahrens 4049fa9e4066Sahrens /* 4050fa9e4066Sahrens * Loop through the requested range [off, off + len] looking 4051fa9e4066Sahrens * for pages. If we don't find a page, we will need to create 4052fa9e4066Sahrens * a new page and fill it with data from the file. 4053fa9e4066Sahrens */ 4054fa9e4066Sahrens while (len > 0) { 4055fa9e4066Sahrens if (plsz < PAGESIZE) 4056fa9e4066Sahrens break; 4057fa9e4066Sahrens if (pp = page_lookup(vp, off, SE_SHARED)) { 4058fa9e4066Sahrens *pl++ = pp; 4059fa9e4066Sahrens off += PAGESIZE; 4060fa9e4066Sahrens addr += PAGESIZE; 4061fa9e4066Sahrens len -= PAGESIZE; 4062fa9e4066Sahrens plsz -= PAGESIZE; 4063fa9e4066Sahrens } else { 4064fa9e4066Sahrens err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw); 4065fe2f476aSperrin if (err) 4066fe2f476aSperrin goto out; 4067fa9e4066Sahrens /* 4068fa9e4066Sahrens * klustering may have changed our region 4069fa9e4066Sahrens * to be block aligned. 4070fa9e4066Sahrens */ 4071fa9e4066Sahrens if (((pp = *pl) != 0) && (off != pp->p_offset)) { 4072fa9e4066Sahrens int delta = off - pp->p_offset; 4073fa9e4066Sahrens len += delta; 4074fa9e4066Sahrens off -= delta; 4075fa9e4066Sahrens addr -= delta; 4076fa9e4066Sahrens } 4077fa9e4066Sahrens while (*pl) { 4078fa9e4066Sahrens pl++; 4079fa9e4066Sahrens off += PAGESIZE; 4080fa9e4066Sahrens addr += PAGESIZE; 4081fa9e4066Sahrens plsz -= PAGESIZE; 4082fa9e4066Sahrens if (len > PAGESIZE) 4083fa9e4066Sahrens len -= PAGESIZE; 4084fa9e4066Sahrens else 4085fa9e4066Sahrens len = 0; 4086fa9e4066Sahrens } 4087fa9e4066Sahrens } 4088fa9e4066Sahrens } 4089fa9e4066Sahrens 4090fa9e4066Sahrens /* 4091fa9e4066Sahrens * Fill out the page array with any pages already in the cache. 4092fa9e4066Sahrens */ 4093fa9e4066Sahrens while (plsz > 0) { 4094fa9e4066Sahrens pp = page_lookup_nowait(vp, off, SE_SHARED); 4095fa9e4066Sahrens if (pp == NULL) 4096fa9e4066Sahrens break; 4097fa9e4066Sahrens *pl++ = pp; 4098fa9e4066Sahrens off += PAGESIZE; 4099fa9e4066Sahrens plsz -= PAGESIZE; 4100fa9e4066Sahrens } 4101fa9e4066Sahrens 4102fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 4103fa9e4066Sahrens out: 4104fe2f476aSperrin /* 4105fe2f476aSperrin * We can't grab the range lock for the page as reader which would 4106fe2f476aSperrin * stop truncation as this leads to deadlock. So we need to recheck 4107fe2f476aSperrin * the file size. 4108fe2f476aSperrin */ 4109fe2f476aSperrin if (orig_off >= zp->z_phys->zp_size) 4110fe2f476aSperrin err = EFAULT; 4111fe2f476aSperrin if (err) { 4112fe2f476aSperrin /* 4113fe2f476aSperrin * Release any pages we have previously locked. 4114fe2f476aSperrin */ 4115fe2f476aSperrin while (pl > pl0) 4116fe2f476aSperrin page_unlock(*--pl); 4117fe2f476aSperrin } 4118fe2f476aSperrin 4119fa9e4066Sahrens *pl = NULL; 4120fa9e4066Sahrens 4121fa9e4066Sahrens if (need_unlock) 4122fa9e4066Sahrens rw_exit(&zp->z_map_lock); 4123fa9e4066Sahrens 4124fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4125fa9e4066Sahrens return (err); 4126fa9e4066Sahrens } 4127fa9e4066Sahrens 4128ea8dc4b6Seschrock /* 4129ea8dc4b6Seschrock * Request a memory map for a section of a file. This code interacts 4130ea8dc4b6Seschrock * with common code and the VM system as follows: 4131ea8dc4b6Seschrock * 4132ea8dc4b6Seschrock * common code calls mmap(), which ends up in smmap_common() 4133ea8dc4b6Seschrock * 4134ea8dc4b6Seschrock * this calls VOP_MAP(), which takes you into (say) zfs 4135ea8dc4b6Seschrock * 4136ea8dc4b6Seschrock * zfs_map() calls as_map(), passing segvn_create() as the callback 4137ea8dc4b6Seschrock * 4138ea8dc4b6Seschrock * segvn_create() creates the new segment and calls VOP_ADDMAP() 4139ea8dc4b6Seschrock * 4140ea8dc4b6Seschrock * zfs_addmap() updates z_mapcnt 4141ea8dc4b6Seschrock */ 4142da6c28aaSamw /*ARGSUSED*/ 4143fa9e4066Sahrens static int 4144fa9e4066Sahrens zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 4145da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4146da6c28aaSamw caller_context_t *ct) 4147fa9e4066Sahrens { 4148fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4149fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4150fa9e4066Sahrens segvn_crargs_t vn_a; 4151fa9e4066Sahrens int error; 4152fa9e4066Sahrens 41530616c50eSmarks ZFS_ENTER(zfsvfs); 41540616c50eSmarks ZFS_VERIFY_ZP(zp); 41550616c50eSmarks 4156da6c28aaSamw if ((prot & PROT_WRITE) && 4157da6c28aaSamw (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_READONLY | 41580616c50eSmarks ZFS_APPENDONLY))) { 41590616c50eSmarks ZFS_EXIT(zfsvfs); 4160da6c28aaSamw return (EPERM); 41610616c50eSmarks } 4162da6c28aaSamw 41630616c50eSmarks if ((prot & (PROT_READ | PROT_EXEC)) && 41640616c50eSmarks (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED)) { 41650616c50eSmarks ZFS_EXIT(zfsvfs); 41660616c50eSmarks return (EACCES); 41670616c50eSmarks } 4168fa9e4066Sahrens 4169fa9e4066Sahrens if (vp->v_flag & VNOMAP) { 4170fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4171fa9e4066Sahrens return (ENOSYS); 4172fa9e4066Sahrens } 4173fa9e4066Sahrens 4174fa9e4066Sahrens if (off < 0 || len > MAXOFFSET_T - off) { 4175fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4176fa9e4066Sahrens return (ENXIO); 4177fa9e4066Sahrens } 4178fa9e4066Sahrens 4179fa9e4066Sahrens if (vp->v_type != VREG) { 4180fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4181fa9e4066Sahrens return (ENODEV); 4182fa9e4066Sahrens } 4183fa9e4066Sahrens 4184fa9e4066Sahrens /* 4185fa9e4066Sahrens * If file is locked, disallow mapping. 4186fa9e4066Sahrens */ 4187ea8dc4b6Seschrock if (MANDMODE((mode_t)zp->z_phys->zp_mode) && vn_has_flocks(vp)) { 4188ea8dc4b6Seschrock ZFS_EXIT(zfsvfs); 4189ea8dc4b6Seschrock return (EAGAIN); 4190fa9e4066Sahrens } 4191fa9e4066Sahrens 4192fa9e4066Sahrens as_rangelock(as); 419360946fe0Smec error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); 419460946fe0Smec if (error != 0) { 419560946fe0Smec as_rangeunlock(as); 419660946fe0Smec ZFS_EXIT(zfsvfs); 419760946fe0Smec return (error); 4198fa9e4066Sahrens } 4199fa9e4066Sahrens 4200fa9e4066Sahrens vn_a.vp = vp; 4201fa9e4066Sahrens vn_a.offset = (u_offset_t)off; 4202fa9e4066Sahrens vn_a.type = flags & MAP_TYPE; 4203fa9e4066Sahrens vn_a.prot = prot; 4204fa9e4066Sahrens vn_a.maxprot = maxprot; 4205fa9e4066Sahrens vn_a.cred = cr; 4206fa9e4066Sahrens vn_a.amp = NULL; 4207fa9e4066Sahrens vn_a.flags = flags & ~MAP_TYPE; 42084944b02eSkchow vn_a.szc = 0; 42094944b02eSkchow vn_a.lgrp_mem_policy_flags = 0; 4210fa9e4066Sahrens 4211fa9e4066Sahrens error = as_map(as, *addrp, len, segvn_create, &vn_a); 4212fa9e4066Sahrens 4213fa9e4066Sahrens as_rangeunlock(as); 4214fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4215fa9e4066Sahrens return (error); 4216fa9e4066Sahrens } 4217fa9e4066Sahrens 4218fa9e4066Sahrens /* ARGSUSED */ 4219fa9e4066Sahrens static int 4220fa9e4066Sahrens zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4221da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4222da6c28aaSamw caller_context_t *ct) 4223fa9e4066Sahrens { 4224ea8dc4b6Seschrock uint64_t pages = btopr(len); 4225ea8dc4b6Seschrock 4226ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 4227fa9e4066Sahrens return (0); 4228fa9e4066Sahrens } 4229fa9e4066Sahrens 4230b468a217Seschrock /* 4231b468a217Seschrock * The reason we push dirty pages as part of zfs_delmap() is so that we get a 4232b468a217Seschrock * more accurate mtime for the associated file. Since we don't have a way of 4233b468a217Seschrock * detecting when the data was actually modified, we have to resort to 4234b468a217Seschrock * heuristics. If an explicit msync() is done, then we mark the mtime when the 4235b468a217Seschrock * last page is pushed. The problem occurs when the msync() call is omitted, 4236b468a217Seschrock * which by far the most common case: 4237b468a217Seschrock * 4238b468a217Seschrock * open() 4239b468a217Seschrock * mmap() 4240b468a217Seschrock * <modify memory> 4241b468a217Seschrock * munmap() 4242b468a217Seschrock * close() 4243b468a217Seschrock * <time lapse> 4244b468a217Seschrock * putpage() via fsflush 4245b468a217Seschrock * 4246b468a217Seschrock * If we wait until fsflush to come along, we can have a modification time that 4247b468a217Seschrock * is some arbitrary point in the future. In order to prevent this in the 4248b468a217Seschrock * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is 4249b468a217Seschrock * torn down. 4250b468a217Seschrock */ 4251fa9e4066Sahrens /* ARGSUSED */ 4252fa9e4066Sahrens static int 4253fa9e4066Sahrens zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4254da6c28aaSamw size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr, 4255da6c28aaSamw caller_context_t *ct) 4256fa9e4066Sahrens { 4257ea8dc4b6Seschrock uint64_t pages = btopr(len); 4258ea8dc4b6Seschrock 4259ea8dc4b6Seschrock ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 4260ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 4261b468a217Seschrock 4262b468a217Seschrock if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && 4263b468a217Seschrock vn_has_cached_data(vp)) 4264da6c28aaSamw (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct); 4265b468a217Seschrock 4266fa9e4066Sahrens return (0); 4267fa9e4066Sahrens } 4268fa9e4066Sahrens 4269fa9e4066Sahrens /* 4270fa9e4066Sahrens * Free or allocate space in a file. Currently, this function only 4271fa9e4066Sahrens * supports the `F_FREESP' command. However, this command is somewhat 4272fa9e4066Sahrens * misnamed, as its functionality includes the ability to allocate as 4273fa9e4066Sahrens * well as free space. 4274fa9e4066Sahrens * 4275fa9e4066Sahrens * IN: vp - vnode of file to free data in. 4276fa9e4066Sahrens * cmd - action to take (only F_FREESP supported). 4277fa9e4066Sahrens * bfp - section of file to free/alloc. 4278fa9e4066Sahrens * flag - current file open mode flags. 4279fa9e4066Sahrens * offset - current file offset. 4280fa9e4066Sahrens * cr - credentials of caller [UNUSED]. 4281da6c28aaSamw * ct - caller context. 4282fa9e4066Sahrens * 4283fa9e4066Sahrens * RETURN: 0 if success 4284fa9e4066Sahrens * error code if failure 4285fa9e4066Sahrens * 4286fa9e4066Sahrens * Timestamps: 4287fa9e4066Sahrens * vp - ctime|mtime updated 4288fa9e4066Sahrens */ 4289fa9e4066Sahrens /* ARGSUSED */ 4290fa9e4066Sahrens static int 4291fa9e4066Sahrens zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 4292fa9e4066Sahrens offset_t offset, cred_t *cr, caller_context_t *ct) 4293fa9e4066Sahrens { 4294fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4295fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4296fa9e4066Sahrens uint64_t off, len; 4297fa9e4066Sahrens int error; 4298fa9e4066Sahrens 42993cb34c60Sahrens ZFS_ENTER(zfsvfs); 43003cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4301fa9e4066Sahrens 4302fa9e4066Sahrens if (cmd != F_FREESP) { 4303fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4304fa9e4066Sahrens return (EINVAL); 4305fa9e4066Sahrens } 4306fa9e4066Sahrens 4307fa9e4066Sahrens if (error = convoff(vp, bfp, 0, offset)) { 4308fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4309fa9e4066Sahrens return (error); 4310fa9e4066Sahrens } 4311fa9e4066Sahrens 4312fa9e4066Sahrens if (bfp->l_len < 0) { 4313fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4314fa9e4066Sahrens return (EINVAL); 4315fa9e4066Sahrens } 4316fa9e4066Sahrens 4317fa9e4066Sahrens off = bfp->l_start; 4318104e2ed7Sperrin len = bfp->l_len; /* 0 means from off to end of file */ 4319104e2ed7Sperrin 4320cdb0ab79Smaybee error = zfs_freesp(zp, off, len, flag, TRUE); 4321fa9e4066Sahrens 4322fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4323fa9e4066Sahrens return (error); 4324fa9e4066Sahrens } 4325fa9e4066Sahrens 4326da6c28aaSamw /*ARGSUSED*/ 4327fa9e4066Sahrens static int 4328da6c28aaSamw zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct) 4329fa9e4066Sahrens { 4330fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4331fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4332f18faf3fSek uint32_t gen; 4333fa9e4066Sahrens uint64_t object = zp->z_id; 4334fa9e4066Sahrens zfid_short_t *zfid; 4335fa9e4066Sahrens int size, i; 4336fa9e4066Sahrens 43373cb34c60Sahrens ZFS_ENTER(zfsvfs); 43383cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4339f18faf3fSek gen = (uint32_t)zp->z_gen; 4340fa9e4066Sahrens 4341fa9e4066Sahrens size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 4342fa9e4066Sahrens if (fidp->fid_len < size) { 4343fa9e4066Sahrens fidp->fid_len = size; 43440f2dc02eSek ZFS_EXIT(zfsvfs); 4345fa9e4066Sahrens return (ENOSPC); 4346fa9e4066Sahrens } 4347fa9e4066Sahrens 4348fa9e4066Sahrens zfid = (zfid_short_t *)fidp; 4349fa9e4066Sahrens 4350fa9e4066Sahrens zfid->zf_len = size; 4351fa9e4066Sahrens 4352fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_object); i++) 4353fa9e4066Sahrens zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 4354fa9e4066Sahrens 4355fa9e4066Sahrens /* Must have a non-zero generation number to distinguish from .zfs */ 4356fa9e4066Sahrens if (gen == 0) 4357fa9e4066Sahrens gen = 1; 4358fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_gen); i++) 4359fa9e4066Sahrens zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 4360fa9e4066Sahrens 4361fa9e4066Sahrens if (size == LONG_FID_LEN) { 4362fa9e4066Sahrens uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 4363fa9e4066Sahrens zfid_long_t *zlfid; 4364fa9e4066Sahrens 4365fa9e4066Sahrens zlfid = (zfid_long_t *)fidp; 4366fa9e4066Sahrens 4367fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setid); i++) 4368fa9e4066Sahrens zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 4369fa9e4066Sahrens 4370fa9e4066Sahrens /* XXX - this should be the generation number for the objset */ 4371fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 4372fa9e4066Sahrens zlfid->zf_setgen[i] = 0; 4373fa9e4066Sahrens } 4374fa9e4066Sahrens 4375fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4376fa9e4066Sahrens return (0); 4377fa9e4066Sahrens } 4378fa9e4066Sahrens 4379fa9e4066Sahrens static int 4380da6c28aaSamw zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, 4381da6c28aaSamw caller_context_t *ct) 4382fa9e4066Sahrens { 4383fa9e4066Sahrens znode_t *zp, *xzp; 4384fa9e4066Sahrens zfsvfs_t *zfsvfs; 4385fa9e4066Sahrens zfs_dirlock_t *dl; 4386fa9e4066Sahrens int error; 4387fa9e4066Sahrens 4388fa9e4066Sahrens switch (cmd) { 4389fa9e4066Sahrens case _PC_LINK_MAX: 4390fa9e4066Sahrens *valp = ULONG_MAX; 4391fa9e4066Sahrens return (0); 4392fa9e4066Sahrens 4393fa9e4066Sahrens case _PC_FILESIZEBITS: 4394fa9e4066Sahrens *valp = 64; 4395fa9e4066Sahrens return (0); 4396fa9e4066Sahrens 4397fa9e4066Sahrens case _PC_XATTR_EXISTS: 4398fa9e4066Sahrens zp = VTOZ(vp); 4399fa9e4066Sahrens zfsvfs = zp->z_zfsvfs; 44003cb34c60Sahrens ZFS_ENTER(zfsvfs); 44013cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4402fa9e4066Sahrens *valp = 0; 4403fa9e4066Sahrens error = zfs_dirent_lock(&dl, zp, "", &xzp, 4404da6c28aaSamw ZXATTR | ZEXISTS | ZSHARED, NULL, NULL); 4405fa9e4066Sahrens if (error == 0) { 4406fa9e4066Sahrens zfs_dirent_unlock(dl); 4407fa9e4066Sahrens if (!zfs_dirempty(xzp)) 4408fa9e4066Sahrens *valp = 1; 4409fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 4410fa9e4066Sahrens } else if (error == ENOENT) { 4411fa9e4066Sahrens /* 4412fa9e4066Sahrens * If there aren't extended attributes, it's the 4413fa9e4066Sahrens * same as having zero of them. 4414fa9e4066Sahrens */ 4415fa9e4066Sahrens error = 0; 4416fa9e4066Sahrens } 4417fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4418fa9e4066Sahrens return (error); 4419fa9e4066Sahrens 4420da6c28aaSamw case _PC_SATTR_ENABLED: 4421da6c28aaSamw case _PC_SATTR_EXISTS: 44229660e5cbSJanice Chang *valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 4423da6c28aaSamw (vp->v_type == VREG || vp->v_type == VDIR); 4424da6c28aaSamw return (0); 4425da6c28aaSamw 4426fa9e4066Sahrens case _PC_ACL_ENABLED: 4427fa9e4066Sahrens *valp = _ACL_ACE_ENABLED; 4428fa9e4066Sahrens return (0); 4429fa9e4066Sahrens 4430fa9e4066Sahrens case _PC_MIN_HOLE_SIZE: 4431fa9e4066Sahrens *valp = (ulong_t)SPA_MINBLOCKSIZE; 4432fa9e4066Sahrens return (0); 4433fa9e4066Sahrens 4434fa9e4066Sahrens default: 4435da6c28aaSamw return (fs_pathconf(vp, cmd, valp, cr, ct)); 4436fa9e4066Sahrens } 4437fa9e4066Sahrens } 4438fa9e4066Sahrens 4439fa9e4066Sahrens /*ARGSUSED*/ 4440fa9e4066Sahrens static int 4441da6c28aaSamw zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4442da6c28aaSamw caller_context_t *ct) 4443fa9e4066Sahrens { 4444fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4445fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4446fa9e4066Sahrens int error; 4447da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4448fa9e4066Sahrens 44493cb34c60Sahrens ZFS_ENTER(zfsvfs); 44503cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4451da6c28aaSamw error = zfs_getacl(zp, vsecp, skipaclchk, cr); 4452fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4453fa9e4066Sahrens 4454fa9e4066Sahrens return (error); 4455fa9e4066Sahrens } 4456fa9e4066Sahrens 4457fa9e4066Sahrens /*ARGSUSED*/ 4458fa9e4066Sahrens static int 4459da6c28aaSamw zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4460da6c28aaSamw caller_context_t *ct) 4461fa9e4066Sahrens { 4462fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4463fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4464fa9e4066Sahrens int error; 4465da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4466fa9e4066Sahrens 44673cb34c60Sahrens ZFS_ENTER(zfsvfs); 44683cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4469da6c28aaSamw error = zfs_setacl(zp, vsecp, skipaclchk, cr); 4470fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4471fa9e4066Sahrens return (error); 4472fa9e4066Sahrens } 4473fa9e4066Sahrens 4474fa9e4066Sahrens /* 4475fa9e4066Sahrens * Predeclare these here so that the compiler assumes that 4476fa9e4066Sahrens * this is an "old style" function declaration that does 4477fa9e4066Sahrens * not include arguments => we won't get type mismatch errors 4478fa9e4066Sahrens * in the initializations that follow. 4479fa9e4066Sahrens */ 4480fa9e4066Sahrens static int zfs_inval(); 4481fa9e4066Sahrens static int zfs_isdir(); 4482fa9e4066Sahrens 4483fa9e4066Sahrens static int 4484fa9e4066Sahrens zfs_inval() 4485fa9e4066Sahrens { 4486fa9e4066Sahrens return (EINVAL); 4487fa9e4066Sahrens } 4488fa9e4066Sahrens 4489fa9e4066Sahrens static int 4490fa9e4066Sahrens zfs_isdir() 4491fa9e4066Sahrens { 4492fa9e4066Sahrens return (EISDIR); 4493fa9e4066Sahrens } 4494fa9e4066Sahrens /* 4495fa9e4066Sahrens * Directory vnode operations template 4496fa9e4066Sahrens */ 4497fa9e4066Sahrens vnodeops_t *zfs_dvnodeops; 4498fa9e4066Sahrens const fs_operation_def_t zfs_dvnodeops_template[] = { 4499aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4500aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4501aa59c4cbSrsb VOPNAME_READ, { .error = zfs_isdir }, 4502aa59c4cbSrsb VOPNAME_WRITE, { .error = zfs_isdir }, 4503aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4504aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4505aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4506aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4507aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4508aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4509aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4510aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4511aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4512aa59c4cbSrsb VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, 4513aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4514aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4515aa59c4cbSrsb VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, 4516aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4517aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4518aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4519aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4520aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4521aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4522aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4523df2381bfSpraks VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4524aa59c4cbSrsb NULL, NULL 4525fa9e4066Sahrens }; 4526fa9e4066Sahrens 4527fa9e4066Sahrens /* 4528fa9e4066Sahrens * Regular file vnode operations template 4529fa9e4066Sahrens */ 4530fa9e4066Sahrens vnodeops_t *zfs_fvnodeops; 4531fa9e4066Sahrens const fs_operation_def_t zfs_fvnodeops_template[] = { 4532aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4533aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4534aa59c4cbSrsb VOPNAME_READ, { .vop_read = zfs_read }, 4535aa59c4cbSrsb VOPNAME_WRITE, { .vop_write = zfs_write }, 4536aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4537aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4538aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4539aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4540aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4541aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4542aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4543aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4544aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4545aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4546aa59c4cbSrsb VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, 4547aa59c4cbSrsb VOPNAME_SPACE, { .vop_space = zfs_space }, 4548aa59c4cbSrsb VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, 4549aa59c4cbSrsb VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, 4550aa59c4cbSrsb VOPNAME_MAP, { .vop_map = zfs_map }, 4551aa59c4cbSrsb VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, 4552aa59c4cbSrsb VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, 4553aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4554aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4555aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4556aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4557aa59c4cbSrsb NULL, NULL 4558fa9e4066Sahrens }; 4559fa9e4066Sahrens 4560fa9e4066Sahrens /* 4561fa9e4066Sahrens * Symbolic link vnode operations template 4562fa9e4066Sahrens */ 4563fa9e4066Sahrens vnodeops_t *zfs_symvnodeops; 4564fa9e4066Sahrens const fs_operation_def_t zfs_symvnodeops_template[] = { 4565aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4566aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4567aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4568aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4569aa59c4cbSrsb VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, 4570aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4571aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4572aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4573aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4574aa59c4cbSrsb NULL, NULL 4575fa9e4066Sahrens }; 4576fa9e4066Sahrens 4577fa9e4066Sahrens /* 4578fa9e4066Sahrens * Extended attribute directory vnode operations template 4579fa9e4066Sahrens * This template is identical to the directory vnodes 4580fa9e4066Sahrens * operation template except for restricted operations: 4581fa9e4066Sahrens * VOP_MKDIR() 4582fa9e4066Sahrens * VOP_SYMLINK() 4583fa9e4066Sahrens * Note that there are other restrictions embedded in: 4584fa9e4066Sahrens * zfs_create() - restrict type to VREG 4585fa9e4066Sahrens * zfs_link() - no links into/out of attribute space 4586fa9e4066Sahrens * zfs_rename() - no moves into/out of attribute space 4587fa9e4066Sahrens */ 4588fa9e4066Sahrens vnodeops_t *zfs_xdvnodeops; 4589fa9e4066Sahrens const fs_operation_def_t zfs_xdvnodeops_template[] = { 4590aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4591aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4592aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4593aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4594aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4595aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4596aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4597aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4598aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4599aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4600aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4601aa59c4cbSrsb VOPNAME_MKDIR, { .error = zfs_inval }, 4602aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4603aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4604aa59c4cbSrsb VOPNAME_SYMLINK, { .error = zfs_inval }, 4605aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4606aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4607aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4608aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4609aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4610aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4611aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4612aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4613aa59c4cbSrsb NULL, NULL 4614fa9e4066Sahrens }; 4615fa9e4066Sahrens 4616fa9e4066Sahrens /* 4617fa9e4066Sahrens * Error vnode operations template 4618fa9e4066Sahrens */ 4619fa9e4066Sahrens vnodeops_t *zfs_evnodeops; 4620fa9e4066Sahrens const fs_operation_def_t zfs_evnodeops_template[] = { 4621aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4622aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4623aa59c4cbSrsb NULL, NULL 4624fa9e4066Sahrens }; 4625