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> 68c1ce5987SMark Shellenbaum #include <sys/sid.h> 69fa9e4066Sahrens #include "fs/fs_subr.h" 70fa9e4066Sahrens #include <sys/zfs_ctldir.h> 71da6c28aaSamw #include <sys/zfs_fuid.h> 72033f9833Sek #include <sys/dnlc.h> 73104e2ed7Sperrin #include <sys/zfs_rlock.h> 74da6c28aaSamw #include <sys/extdirent.h> 75da6c28aaSamw #include <sys/kidmap.h> 76da6c28aaSamw #include <sys/cred_impl.h> 77b38f0970Sck #include <sys/attr.h> 78fa9e4066Sahrens 79fa9e4066Sahrens /* 80fa9e4066Sahrens * Programming rules. 81fa9e4066Sahrens * 82fa9e4066Sahrens * Each vnode op performs some logical unit of work. To do this, the ZPL must 83fa9e4066Sahrens * properly lock its in-core state, create a DMU transaction, do the work, 84fa9e4066Sahrens * record this work in the intent log (ZIL), commit the DMU transaction, 85da6c28aaSamw * and wait for the intent log to commit if it is a synchronous operation. 86da6c28aaSamw * Moreover, the vnode ops must work in both normal and log replay context. 87fa9e4066Sahrens * The ordering of events is important to avoid deadlocks and references 88fa9e4066Sahrens * to freed memory. The example below illustrates the following Big Rules: 89fa9e4066Sahrens * 90fa9e4066Sahrens * (1) A check must be made in each zfs thread for a mounted file system. 913cb34c60Sahrens * This is done avoiding races using ZFS_ENTER(zfsvfs). 923cb34c60Sahrens * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes 933cb34c60Sahrens * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros 943cb34c60Sahrens * can return EIO from the calling function. 95fa9e4066Sahrens * 96fa9e4066Sahrens * (2) VN_RELE() should always be the last thing except for zil_commit() 97b19a79ecSperrin * (if necessary) and ZFS_EXIT(). This is for 3 reasons: 98fa9e4066Sahrens * First, if it's the last reference, the vnode/znode 99fa9e4066Sahrens * can be freed, so the zp may point to freed memory. Second, the last 100fa9e4066Sahrens * reference will call zfs_zinactive(), which may induce a lot of work -- 101104e2ed7Sperrin * pushing cached pages (which acquires range locks) and syncing out 102fa9e4066Sahrens * cached atime changes. Third, zfs_zinactive() may require a new tx, 103fa9e4066Sahrens * which could deadlock the system if you were already holding one. 104fa9e4066Sahrens * 1057885c754Sperrin * (3) All range locks must be grabbed before calling dmu_tx_assign(), 1067885c754Sperrin * as they can span dmu_tx_assign() calls. 1077885c754Sperrin * 108*1209a471SNeil Perrin * (4) Always pass TXG_NOWAIT as the second argument to dmu_tx_assign(). 109fa9e4066Sahrens * This is critical because we don't want to block while holding locks. 110fa9e4066Sahrens * Note, in particular, that if a lock is sometimes acquired before 111fa9e4066Sahrens * the tx assigns, and sometimes after (e.g. z_lock), then failing to 112fa9e4066Sahrens * use a non-blocking assign can deadlock the system. The scenario: 113fa9e4066Sahrens * 114fa9e4066Sahrens * Thread A has grabbed a lock before calling dmu_tx_assign(). 115fa9e4066Sahrens * Thread B is in an already-assigned tx, and blocks for this lock. 116fa9e4066Sahrens * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 117fa9e4066Sahrens * forever, because the previous txg can't quiesce until B's tx commits. 118fa9e4066Sahrens * 119fa9e4066Sahrens * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 1208a2f1b91Sahrens * then drop all locks, call dmu_tx_wait(), and try again. 121fa9e4066Sahrens * 1227885c754Sperrin * (5) If the operation succeeded, generate the intent log entry for it 123fa9e4066Sahrens * before dropping locks. This ensures that the ordering of events 124fa9e4066Sahrens * in the intent log matches the order in which they actually occurred. 125*1209a471SNeil Perrin * During ZIL replay the zfs_log_* functions will update the sequence 126*1209a471SNeil Perrin * number to indicate the zil transaction has replayed. 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 142*1209a471SNeil Perrin * error = dmu_tx_assign(tx, TXG_NOWAIT); // 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 147*1209a471SNeil Perrin * if (error == ERESTART) { 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 * Write the bytes to a file. 564fa9e4066Sahrens * 565fa9e4066Sahrens * IN: vp - vnode of file to be written to. 566fa9e4066Sahrens * uio - structure supplying write location, range info, 567fa9e4066Sahrens * and data buffer. 568fa9e4066Sahrens * ioflag - FAPPEND flag set if in append mode. 569fa9e4066Sahrens * cr - credentials of caller. 570da6c28aaSamw * ct - caller context (NFS/CIFS fem monitor only) 571fa9e4066Sahrens * 572fa9e4066Sahrens * OUT: uio - updated offset and range. 573fa9e4066Sahrens * 574fa9e4066Sahrens * RETURN: 0 if success 575fa9e4066Sahrens * error code if failure 576fa9e4066Sahrens * 577fa9e4066Sahrens * Timestamps: 578fa9e4066Sahrens * vp - ctime|mtime updated if byte count > 0 579fa9e4066Sahrens */ 580fa9e4066Sahrens /* ARGSUSED */ 581fa9e4066Sahrens static int 582fa9e4066Sahrens zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 583fa9e4066Sahrens { 584fa9e4066Sahrens znode_t *zp = VTOZ(vp); 585fa9e4066Sahrens rlim64_t limit = uio->uio_llimit; 586fa9e4066Sahrens ssize_t start_resid = uio->uio_resid; 587fa9e4066Sahrens ssize_t tx_bytes; 588fa9e4066Sahrens uint64_t end_size; 589fa9e4066Sahrens dmu_tx_t *tx; 590fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 591f18faf3fSek zilog_t *zilog; 592fa9e4066Sahrens offset_t woff; 593fa9e4066Sahrens ssize_t n, nbytes; 594104e2ed7Sperrin rl_t *rl; 595fa9e4066Sahrens int max_blksz = zfsvfs->z_max_blksz; 596c09193bfSmarks uint64_t pflags; 597104e2ed7Sperrin int error; 598fa9e4066Sahrens 599fa9e4066Sahrens /* 600fa9e4066Sahrens * Fasttrack empty write 601fa9e4066Sahrens */ 602104e2ed7Sperrin n = start_resid; 603fa9e4066Sahrens if (n == 0) 604fa9e4066Sahrens return (0); 605fa9e4066Sahrens 606104e2ed7Sperrin if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 607104e2ed7Sperrin limit = MAXOFFSET_T; 608104e2ed7Sperrin 6093cb34c60Sahrens ZFS_ENTER(zfsvfs); 6103cb34c60Sahrens ZFS_VERIFY_ZP(zp); 611c09193bfSmarks 612c09193bfSmarks /* 613c09193bfSmarks * If immutable or not appending then return EPERM 614c09193bfSmarks */ 615c09193bfSmarks pflags = zp->z_phys->zp_flags; 616c09193bfSmarks if ((pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) || 617c09193bfSmarks ((pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) && 618c09193bfSmarks (uio->uio_loffset < zp->z_phys->zp_size))) { 619c09193bfSmarks ZFS_EXIT(zfsvfs); 620c09193bfSmarks return (EPERM); 621c09193bfSmarks } 622c09193bfSmarks 623f18faf3fSek zilog = zfsvfs->z_log; 624fa9e4066Sahrens 625fa9e4066Sahrens /* 626c5c6ffa0Smaybee * Pre-fault the pages to ensure slow (eg NFS) pages 627104e2ed7Sperrin * don't hold up txg. 628fa9e4066Sahrens */ 6296f5f1c63SDonghai Qiao uio_prefaultpages(n, uio); 630fa9e4066Sahrens 631fa9e4066Sahrens /* 632fa9e4066Sahrens * If in append mode, set the io offset pointer to eof. 633fa9e4066Sahrens */ 634104e2ed7Sperrin if (ioflag & FAPPEND) { 635104e2ed7Sperrin /* 636104e2ed7Sperrin * Range lock for a file append: 637104e2ed7Sperrin * The value for the start of range will be determined by 638104e2ed7Sperrin * zfs_range_lock() (to guarantee append semantics). 639104e2ed7Sperrin * If this write will cause the block size to increase, 640104e2ed7Sperrin * zfs_range_lock() will lock the entire file, so we must 641104e2ed7Sperrin * later reduce the range after we grow the block size. 642104e2ed7Sperrin */ 643104e2ed7Sperrin rl = zfs_range_lock(zp, 0, n, RL_APPEND); 644104e2ed7Sperrin if (rl->r_len == UINT64_MAX) { 645104e2ed7Sperrin /* overlocked, zp_size can't change */ 646104e2ed7Sperrin woff = uio->uio_loffset = zp->z_phys->zp_size; 647104e2ed7Sperrin } else { 648104e2ed7Sperrin woff = uio->uio_loffset = rl->r_off; 649104e2ed7Sperrin } 650fa9e4066Sahrens } else { 651fa9e4066Sahrens woff = uio->uio_loffset; 652fa9e4066Sahrens /* 653fa9e4066Sahrens * Validate file offset 654fa9e4066Sahrens */ 655fa9e4066Sahrens if (woff < 0) { 656fa9e4066Sahrens ZFS_EXIT(zfsvfs); 657fa9e4066Sahrens return (EINVAL); 658fa9e4066Sahrens } 659fa9e4066Sahrens 660fa9e4066Sahrens /* 661104e2ed7Sperrin * If we need to grow the block size then zfs_range_lock() 662104e2ed7Sperrin * will lock a wider range than we request here. 663104e2ed7Sperrin * Later after growing the block size we reduce the range. 664fa9e4066Sahrens */ 665104e2ed7Sperrin rl = zfs_range_lock(zp, woff, n, RL_WRITER); 666fa9e4066Sahrens } 667fa9e4066Sahrens 668fa9e4066Sahrens if (woff >= limit) { 669feb08c6bSbillm zfs_range_unlock(rl); 670feb08c6bSbillm ZFS_EXIT(zfsvfs); 671feb08c6bSbillm return (EFBIG); 672fa9e4066Sahrens } 673fa9e4066Sahrens 674fa9e4066Sahrens if ((woff + n) > limit || woff > (limit - n)) 675fa9e4066Sahrens n = limit - woff; 676fa9e4066Sahrens 677fa9e4066Sahrens /* 678104e2ed7Sperrin * Check for mandatory locks 679fa9e4066Sahrens */ 680fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode) && 681feb08c6bSbillm (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 682feb08c6bSbillm zfs_range_unlock(rl); 683feb08c6bSbillm ZFS_EXIT(zfsvfs); 684feb08c6bSbillm return (error); 685fa9e4066Sahrens } 686feb08c6bSbillm end_size = MAX(zp->z_phys->zp_size, woff + n); 687fa9e4066Sahrens 688104e2ed7Sperrin /* 689feb08c6bSbillm * Write the file in reasonable size chunks. Each chunk is written 690feb08c6bSbillm * in a separate transaction; this keeps the intent log records small 691feb08c6bSbillm * and allows us to do more fine-grained space accounting. 692104e2ed7Sperrin */ 693feb08c6bSbillm while (n > 0) { 694feb08c6bSbillm /* 695feb08c6bSbillm * Start a transaction. 696feb08c6bSbillm */ 697feb08c6bSbillm woff = uio->uio_loffset; 698feb08c6bSbillm tx = dmu_tx_create(zfsvfs->z_os); 699feb08c6bSbillm dmu_tx_hold_bonus(tx, zp->z_id); 700feb08c6bSbillm dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 701*1209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 702feb08c6bSbillm if (error) { 703*1209a471SNeil Perrin if (error == ERESTART) { 704feb08c6bSbillm dmu_tx_wait(tx); 705feb08c6bSbillm dmu_tx_abort(tx); 706feb08c6bSbillm continue; 707feb08c6bSbillm } 708feb08c6bSbillm dmu_tx_abort(tx); 709feb08c6bSbillm break; 710feb08c6bSbillm } 711104e2ed7Sperrin 712feb08c6bSbillm /* 713feb08c6bSbillm * If zfs_range_lock() over-locked we grow the blocksize 714feb08c6bSbillm * and then reduce the lock range. This will only happen 715feb08c6bSbillm * on the first iteration since zfs_range_reduce() will 716feb08c6bSbillm * shrink down r_len to the appropriate size. 717feb08c6bSbillm */ 718feb08c6bSbillm if (rl->r_len == UINT64_MAX) { 719feb08c6bSbillm uint64_t new_blksz; 720feb08c6bSbillm 721feb08c6bSbillm if (zp->z_blksz > max_blksz) { 722feb08c6bSbillm ASSERT(!ISP2(zp->z_blksz)); 723feb08c6bSbillm new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 724feb08c6bSbillm } else { 725feb08c6bSbillm new_blksz = MIN(end_size, max_blksz); 726feb08c6bSbillm } 727feb08c6bSbillm zfs_grow_blocksize(zp, new_blksz, tx); 728feb08c6bSbillm zfs_range_reduce(rl, woff, n); 729fa9e4066Sahrens } 730fa9e4066Sahrens 731fa9e4066Sahrens /* 732fa9e4066Sahrens * XXX - should we really limit each write to z_max_blksz? 733fa9e4066Sahrens * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 734fa9e4066Sahrens */ 735fa9e4066Sahrens nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 736fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_READER); 737fa9e4066Sahrens 738fa9e4066Sahrens tx_bytes = uio->uio_resid; 739fa9e4066Sahrens if (vn_has_cached_data(vp)) { 740fa9e4066Sahrens rw_exit(&zp->z_map_lock); 741feb08c6bSbillm error = mappedwrite(vp, nbytes, uio, tx); 742fa9e4066Sahrens } else { 743fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 744feb08c6bSbillm uio, nbytes, tx); 745fa9e4066Sahrens rw_exit(&zp->z_map_lock); 746fa9e4066Sahrens } 747fa9e4066Sahrens tx_bytes -= uio->uio_resid; 748fa9e4066Sahrens 749feb08c6bSbillm /* 750feb08c6bSbillm * If we made no progress, we're done. If we made even 751feb08c6bSbillm * partial progress, update the znode and ZIL accordingly. 752feb08c6bSbillm */ 753feb08c6bSbillm if (tx_bytes == 0) { 754af2c4821Smaybee dmu_tx_commit(tx); 755feb08c6bSbillm ASSERT(error != 0); 756fa9e4066Sahrens break; 757fa9e4066Sahrens } 758fa9e4066Sahrens 759169cdae2Smarks /* 760169cdae2Smarks * Clear Set-UID/Set-GID bits on successful write if not 761169cdae2Smarks * privileged and at least one of the excute bits is set. 762169cdae2Smarks * 763169cdae2Smarks * It would be nice to to this after all writes have 764169cdae2Smarks * been done, but that would still expose the ISUID/ISGID 765169cdae2Smarks * to another app after the partial write is committed. 766da6c28aaSamw * 767da6c28aaSamw * Note: we don't call zfs_fuid_map_id() here because 768da6c28aaSamw * user 0 is not an ephemeral uid. 769169cdae2Smarks */ 770169cdae2Smarks mutex_enter(&zp->z_acl_lock); 771169cdae2Smarks if ((zp->z_phys->zp_mode & (S_IXUSR | (S_IXUSR >> 3) | 772169cdae2Smarks (S_IXUSR >> 6))) != 0 && 773169cdae2Smarks (zp->z_phys->zp_mode & (S_ISUID | S_ISGID)) != 0 && 774169cdae2Smarks secpolicy_vnode_setid_retain(cr, 775169cdae2Smarks (zp->z_phys->zp_mode & S_ISUID) != 0 && 776169cdae2Smarks zp->z_phys->zp_uid == 0) != 0) { 777ecb72030Sperrin zp->z_phys->zp_mode &= ~(S_ISUID | S_ISGID); 778169cdae2Smarks } 779169cdae2Smarks mutex_exit(&zp->z_acl_lock); 780169cdae2Smarks 781fa9e4066Sahrens /* 782feb08c6bSbillm * Update time stamp. NOTE: This marks the bonus buffer as 783feb08c6bSbillm * dirty, so we don't have to do it again for zp_size. 784fa9e4066Sahrens */ 785fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 786fa9e4066Sahrens 787fa9e4066Sahrens /* 788feb08c6bSbillm * Update the file size (zp_size) if it has changed; 789feb08c6bSbillm * account for possible concurrent updates. 790fa9e4066Sahrens */ 791feb08c6bSbillm while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) 792fa9e4066Sahrens (void) atomic_cas_64(&zp->z_phys->zp_size, end_size, 793fa9e4066Sahrens uio->uio_loffset); 794feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 795feb08c6bSbillm dmu_tx_commit(tx); 796fa9e4066Sahrens 797feb08c6bSbillm if (error != 0) 798feb08c6bSbillm break; 799feb08c6bSbillm ASSERT(tx_bytes == nbytes); 800feb08c6bSbillm n -= nbytes; 801feb08c6bSbillm } 802fa9e4066Sahrens 803c5c6ffa0Smaybee zfs_range_unlock(rl); 804fa9e4066Sahrens 805fa9e4066Sahrens /* 806fa9e4066Sahrens * If we're in replay mode, or we made no progress, return error. 807fa9e4066Sahrens * Otherwise, it's at least a partial write, so it's successful. 808fa9e4066Sahrens */ 809*1209a471SNeil Perrin if (zfsvfs->z_replay || uio->uio_resid == start_resid) { 810fa9e4066Sahrens ZFS_EXIT(zfsvfs); 811fa9e4066Sahrens return (error); 812fa9e4066Sahrens } 813fa9e4066Sahrens 814b19a79ecSperrin if (ioflag & (FSYNC | FDSYNC)) 815b19a79ecSperrin zil_commit(zilog, zp->z_last_itx, zp->z_id); 816fa9e4066Sahrens 817fa9e4066Sahrens ZFS_EXIT(zfsvfs); 818fa9e4066Sahrens return (0); 819fa9e4066Sahrens } 820fa9e4066Sahrens 821c5c6ffa0Smaybee void 82267bd71c6Sperrin zfs_get_done(dmu_buf_t *db, void *vzgd) 823c5c6ffa0Smaybee { 82467bd71c6Sperrin zgd_t *zgd = (zgd_t *)vzgd; 82567bd71c6Sperrin rl_t *rl = zgd->zgd_rl; 826c5c6ffa0Smaybee vnode_t *vp = ZTOV(rl->r_zp); 827c5c6ffa0Smaybee 82867bd71c6Sperrin dmu_buf_rele(db, vzgd); 829c5c6ffa0Smaybee zfs_range_unlock(rl); 830c5c6ffa0Smaybee VN_RELE(vp); 83117f17c2dSbonwick zil_add_block(zgd->zgd_zilog, zgd->zgd_bp); 83267bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 833c5c6ffa0Smaybee } 834c5c6ffa0Smaybee 835fa9e4066Sahrens /* 836fa9e4066Sahrens * Get data to generate a TX_WRITE intent log record. 837fa9e4066Sahrens */ 838fa9e4066Sahrens int 839c5c6ffa0Smaybee zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) 840fa9e4066Sahrens { 841fa9e4066Sahrens zfsvfs_t *zfsvfs = arg; 842fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 843fa9e4066Sahrens znode_t *zp; 844fa9e4066Sahrens uint64_t off = lr->lr_offset; 845c5c6ffa0Smaybee dmu_buf_t *db; 846104e2ed7Sperrin rl_t *rl; 84767bd71c6Sperrin zgd_t *zgd; 848feb08c6bSbillm int dlen = lr->lr_length; /* length of user data */ 849fa9e4066Sahrens int error = 0; 850fa9e4066Sahrens 85167bd71c6Sperrin ASSERT(zio); 852fa9e4066Sahrens ASSERT(dlen != 0); 853fa9e4066Sahrens 854fa9e4066Sahrens /* 855104e2ed7Sperrin * Nothing to do if the file has been removed 856fa9e4066Sahrens */ 857fa9e4066Sahrens if (zfs_zget(zfsvfs, lr->lr_foid, &zp) != 0) 858fa9e4066Sahrens return (ENOENT); 859893a6d32Sahrens if (zp->z_unlinked) { 860fa9e4066Sahrens VN_RELE(ZTOV(zp)); 861fa9e4066Sahrens return (ENOENT); 862fa9e4066Sahrens } 863fa9e4066Sahrens 864fa9e4066Sahrens /* 865fa9e4066Sahrens * Write records come in two flavors: immediate and indirect. 866fa9e4066Sahrens * For small writes it's cheaper to store the data with the 867fa9e4066Sahrens * log record (immediate); for large writes it's cheaper to 868fa9e4066Sahrens * sync the data and get a pointer to it (indirect) so that 869fa9e4066Sahrens * we don't have to write the data twice. 870fa9e4066Sahrens */ 871104e2ed7Sperrin if (buf != NULL) { /* immediate write */ 872104e2ed7Sperrin rl = zfs_range_lock(zp, off, dlen, RL_READER); 873104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 874104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 875104e2ed7Sperrin error = ENOENT; 876104e2ed7Sperrin goto out; 877104e2ed7Sperrin } 87810d957caSmaybee VERIFY(0 == dmu_read(os, lr->lr_foid, off, dlen, buf)); 879104e2ed7Sperrin } else { /* indirect write */ 880104e2ed7Sperrin uint64_t boff; /* block starting offset */ 881104e2ed7Sperrin 882fa9e4066Sahrens /* 883104e2ed7Sperrin * Have to lock the whole block to ensure when it's 884104e2ed7Sperrin * written out and it's checksum is being calculated 885104e2ed7Sperrin * that no one can change the data. We need to re-check 886104e2ed7Sperrin * blocksize after we get the lock in case it's changed! 887fa9e4066Sahrens */ 888104e2ed7Sperrin for (;;) { 8895263255cSperrin if (ISP2(zp->z_blksz)) { 8905263255cSperrin boff = P2ALIGN_TYPED(off, zp->z_blksz, 8915263255cSperrin uint64_t); 8925263255cSperrin } else { 8935263255cSperrin boff = 0; 8945263255cSperrin } 895104e2ed7Sperrin dlen = zp->z_blksz; 896104e2ed7Sperrin rl = zfs_range_lock(zp, boff, dlen, RL_READER); 897104e2ed7Sperrin if (zp->z_blksz == dlen) 898104e2ed7Sperrin break; 899c5c6ffa0Smaybee zfs_range_unlock(rl); 900104e2ed7Sperrin } 901104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 902104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 903104e2ed7Sperrin error = ENOENT; 904104e2ed7Sperrin goto out; 905104e2ed7Sperrin } 90667bd71c6Sperrin zgd = (zgd_t *)kmem_alloc(sizeof (zgd_t), KM_SLEEP); 90767bd71c6Sperrin zgd->zgd_rl = rl; 90867bd71c6Sperrin zgd->zgd_zilog = zfsvfs->z_log; 90967bd71c6Sperrin zgd->zgd_bp = &lr->lr_blkptr; 91067bd71c6Sperrin VERIFY(0 == dmu_buf_hold(os, lr->lr_foid, boff, zgd, &db)); 911c5c6ffa0Smaybee ASSERT(boff == db->db_offset); 912c5c6ffa0Smaybee lr->lr_blkoff = off - boff; 913c5c6ffa0Smaybee error = dmu_sync(zio, db, &lr->lr_blkptr, 91467bd71c6Sperrin lr->lr_common.lrc_txg, zfs_get_done, zgd); 915f4d2e9e6Smaybee ASSERT((error && error != EINPROGRESS) || 916f4d2e9e6Smaybee lr->lr_length <= zp->z_blksz); 91717f17c2dSbonwick if (error == 0) 91817f17c2dSbonwick zil_add_block(zfsvfs->z_log, &lr->lr_blkptr); 919c5c6ffa0Smaybee /* 920c5c6ffa0Smaybee * If we get EINPROGRESS, then we need to wait for a 921c5c6ffa0Smaybee * write IO initiated by dmu_sync() to complete before 922b19a79ecSperrin * we can release this dbuf. We will finish everything 923c5c6ffa0Smaybee * up in the zfs_get_done() callback. 924c5c6ffa0Smaybee */ 925c5c6ffa0Smaybee if (error == EINPROGRESS) 926c5c6ffa0Smaybee return (0); 92767bd71c6Sperrin dmu_buf_rele(db, zgd); 92867bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 929fa9e4066Sahrens } 930104e2ed7Sperrin out: 931c5c6ffa0Smaybee zfs_range_unlock(rl); 932fa9e4066Sahrens VN_RELE(ZTOV(zp)); 933fa9e4066Sahrens return (error); 934fa9e4066Sahrens } 935fa9e4066Sahrens 936fa9e4066Sahrens /*ARGSUSED*/ 937fa9e4066Sahrens static int 938da6c28aaSamw zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr, 939da6c28aaSamw caller_context_t *ct) 940fa9e4066Sahrens { 941fa9e4066Sahrens znode_t *zp = VTOZ(vp); 942fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 943fa9e4066Sahrens int error; 944fa9e4066Sahrens 9453cb34c60Sahrens ZFS_ENTER(zfsvfs); 9463cb34c60Sahrens ZFS_VERIFY_ZP(zp); 947da6c28aaSamw 948da6c28aaSamw if (flag & V_ACE_MASK) 949da6c28aaSamw error = zfs_zaccess(zp, mode, flag, B_FALSE, cr); 950da6c28aaSamw else 951da6c28aaSamw error = zfs_zaccess_rwx(zp, mode, flag, cr); 952da6c28aaSamw 953fa9e4066Sahrens ZFS_EXIT(zfsvfs); 954fa9e4066Sahrens return (error); 955fa9e4066Sahrens } 956fa9e4066Sahrens 957fa9e4066Sahrens /* 958fa9e4066Sahrens * Lookup an entry in a directory, or an extended attribute directory. 959fa9e4066Sahrens * If it exists, return a held vnode reference for it. 960fa9e4066Sahrens * 961fa9e4066Sahrens * IN: dvp - vnode of directory to search. 962fa9e4066Sahrens * nm - name of entry to lookup. 963fa9e4066Sahrens * pnp - full pathname to lookup [UNUSED]. 964fa9e4066Sahrens * flags - LOOKUP_XATTR set if looking for an attribute. 965fa9e4066Sahrens * rdir - root directory vnode [UNUSED]. 966fa9e4066Sahrens * cr - credentials of caller. 967da6c28aaSamw * ct - caller context 968da6c28aaSamw * direntflags - directory lookup flags 969da6c28aaSamw * realpnp - returned pathname. 970fa9e4066Sahrens * 971fa9e4066Sahrens * OUT: vpp - vnode of located entry, NULL if not found. 972fa9e4066Sahrens * 973fa9e4066Sahrens * RETURN: 0 if success 974fa9e4066Sahrens * error code if failure 975fa9e4066Sahrens * 976fa9e4066Sahrens * Timestamps: 977fa9e4066Sahrens * NA 978fa9e4066Sahrens */ 979fa9e4066Sahrens /* ARGSUSED */ 980fa9e4066Sahrens static int 981fa9e4066Sahrens zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 982da6c28aaSamw int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, 983da6c28aaSamw int *direntflags, pathname_t *realpnp) 984fa9e4066Sahrens { 985fa9e4066Sahrens znode_t *zdp = VTOZ(dvp); 986fa9e4066Sahrens zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 987fa9e4066Sahrens int error; 988fa9e4066Sahrens 9893cb34c60Sahrens ZFS_ENTER(zfsvfs); 9903cb34c60Sahrens ZFS_VERIFY_ZP(zdp); 991fa9e4066Sahrens 992fa9e4066Sahrens *vpp = NULL; 993fa9e4066Sahrens 994fa9e4066Sahrens if (flags & LOOKUP_XATTR) { 9957b55fa8eSck /* 9967b55fa8eSck * If the xattr property is off, refuse the lookup request. 9977b55fa8eSck */ 9987b55fa8eSck if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 9997b55fa8eSck ZFS_EXIT(zfsvfs); 10007b55fa8eSck return (EINVAL); 10017b55fa8eSck } 10027b55fa8eSck 1003fa9e4066Sahrens /* 1004fa9e4066Sahrens * We don't allow recursive attributes.. 1005fa9e4066Sahrens * Maybe someday we will. 1006fa9e4066Sahrens */ 1007fa9e4066Sahrens if (zdp->z_phys->zp_flags & ZFS_XATTR) { 1008fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1009fa9e4066Sahrens return (EINVAL); 1010fa9e4066Sahrens } 1011fa9e4066Sahrens 10123f063a9dSck if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 1013fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1014fa9e4066Sahrens return (error); 1015fa9e4066Sahrens } 1016fa9e4066Sahrens 1017fa9e4066Sahrens /* 1018fa9e4066Sahrens * Do we have permission to get into attribute directory? 1019fa9e4066Sahrens */ 1020fa9e4066Sahrens 1021da6c28aaSamw if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0, 1022da6c28aaSamw B_FALSE, cr)) { 1023fa9e4066Sahrens VN_RELE(*vpp); 1024da6c28aaSamw *vpp = NULL; 1025fa9e4066Sahrens } 1026fa9e4066Sahrens 1027fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1028fa9e4066Sahrens return (error); 1029fa9e4066Sahrens } 1030fa9e4066Sahrens 10310f2dc02eSek if (dvp->v_type != VDIR) { 10320f2dc02eSek ZFS_EXIT(zfsvfs); 1033736b9155Smarks return (ENOTDIR); 10340f2dc02eSek } 1035736b9155Smarks 1036fa9e4066Sahrens /* 1037fa9e4066Sahrens * Check accessibility of directory. 1038fa9e4066Sahrens */ 1039fa9e4066Sahrens 1040da6c28aaSamw if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) { 1041fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1042fa9e4066Sahrens return (error); 1043fa9e4066Sahrens } 1044fa9e4066Sahrens 1045de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), 1046da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1047da6c28aaSamw ZFS_EXIT(zfsvfs); 1048da6c28aaSamw return (EILSEQ); 1049da6c28aaSamw } 1050fa9e4066Sahrens 1051da6c28aaSamw error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp); 1052da6c28aaSamw if (error == 0) { 1053fa9e4066Sahrens /* 1054fa9e4066Sahrens * Convert device special files 1055fa9e4066Sahrens */ 1056fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1057fa9e4066Sahrens vnode_t *svp; 1058fa9e4066Sahrens 1059fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1060fa9e4066Sahrens VN_RELE(*vpp); 1061fa9e4066Sahrens if (svp == NULL) 1062fa9e4066Sahrens error = ENOSYS; 1063fa9e4066Sahrens else 1064fa9e4066Sahrens *vpp = svp; 1065fa9e4066Sahrens } 1066fa9e4066Sahrens } 1067fa9e4066Sahrens 1068fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1069fa9e4066Sahrens return (error); 1070fa9e4066Sahrens } 1071fa9e4066Sahrens 1072fa9e4066Sahrens /* 1073fa9e4066Sahrens * Attempt to create a new entry in a directory. If the entry 1074fa9e4066Sahrens * already exists, truncate the file if permissible, else return 1075fa9e4066Sahrens * an error. Return the vp of the created or trunc'd file. 1076fa9e4066Sahrens * 1077fa9e4066Sahrens * IN: dvp - vnode of directory to put new file entry in. 1078fa9e4066Sahrens * name - name of new file entry. 1079fa9e4066Sahrens * vap - attributes of new file. 1080fa9e4066Sahrens * excl - flag indicating exclusive or non-exclusive mode. 1081fa9e4066Sahrens * mode - mode to open file with. 1082fa9e4066Sahrens * cr - credentials of caller. 1083fa9e4066Sahrens * flag - large file flag [UNUSED]. 1084da6c28aaSamw * ct - caller context 1085da6c28aaSamw * vsecp - ACL to be set 1086fa9e4066Sahrens * 1087fa9e4066Sahrens * OUT: vpp - vnode of created or trunc'd entry. 1088fa9e4066Sahrens * 1089fa9e4066Sahrens * RETURN: 0 if success 1090fa9e4066Sahrens * error code if failure 1091fa9e4066Sahrens * 1092fa9e4066Sahrens * Timestamps: 1093fa9e4066Sahrens * dvp - ctime|mtime updated if new entry created 1094fa9e4066Sahrens * vp - ctime|mtime always, atime if new 1095fa9e4066Sahrens */ 1096da6c28aaSamw 1097fa9e4066Sahrens /* ARGSUSED */ 1098fa9e4066Sahrens static int 1099fa9e4066Sahrens zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, 1100da6c28aaSamw int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct, 1101da6c28aaSamw vsecattr_t *vsecp) 1102fa9e4066Sahrens { 1103fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1104fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1105f18faf3fSek zilog_t *zilog; 1106f18faf3fSek objset_t *os; 1107fa9e4066Sahrens zfs_dirlock_t *dl; 1108fa9e4066Sahrens dmu_tx_t *tx; 1109fa9e4066Sahrens int error; 1110da6c28aaSamw zfs_acl_t *aclp = NULL; 1111da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 1112c1ce5987SMark Shellenbaum ksid_t *ksid; 1113c1ce5987SMark Shellenbaum uid_t uid; 1114c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 1115da6c28aaSamw 1116da6c28aaSamw /* 1117da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1118da6c28aaSamw * make sure file system is at proper version 1119da6c28aaSamw */ 1120da6c28aaSamw 1121c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 1122c1ce5987SMark Shellenbaum if (ksid) 1123c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 1124c1ce5987SMark Shellenbaum else 1125c1ce5987SMark Shellenbaum uid = crgetuid(cr); 1126c1ce5987SMark Shellenbaum 1127da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1128da6c28aaSamw (vsecp || (vap->va_mask & AT_XVATTR) || 1129c1ce5987SMark Shellenbaum IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1130da6c28aaSamw return (EINVAL); 1131fa9e4066Sahrens 11323cb34c60Sahrens ZFS_ENTER(zfsvfs); 11333cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1134f18faf3fSek os = zfsvfs->z_os; 1135f18faf3fSek zilog = zfsvfs->z_log; 1136fa9e4066Sahrens 1137de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 1138da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1139da6c28aaSamw ZFS_EXIT(zfsvfs); 1140da6c28aaSamw return (EILSEQ); 1141da6c28aaSamw } 1142da6c28aaSamw 1143da6c28aaSamw if (vap->va_mask & AT_XVATTR) { 1144da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1145da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1146da6c28aaSamw ZFS_EXIT(zfsvfs); 1147da6c28aaSamw return (error); 1148da6c28aaSamw } 1149da6c28aaSamw } 1150fa9e4066Sahrens top: 1151fa9e4066Sahrens *vpp = NULL; 1152fa9e4066Sahrens 1153fa9e4066Sahrens if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) 1154fa9e4066Sahrens vap->va_mode &= ~VSVTX; 1155fa9e4066Sahrens 1156fa9e4066Sahrens if (*name == '\0') { 1157fa9e4066Sahrens /* 1158fa9e4066Sahrens * Null component name refers to the directory itself. 1159fa9e4066Sahrens */ 1160fa9e4066Sahrens VN_HOLD(dvp); 1161fa9e4066Sahrens zp = dzp; 1162fa9e4066Sahrens dl = NULL; 1163fa9e4066Sahrens error = 0; 1164fa9e4066Sahrens } else { 1165fa9e4066Sahrens /* possible VN_HOLD(zp) */ 1166da6c28aaSamw int zflg = 0; 1167da6c28aaSamw 1168da6c28aaSamw if (flag & FIGNORECASE) 1169da6c28aaSamw zflg |= ZCILOOK; 1170da6c28aaSamw 1171da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1172da6c28aaSamw NULL, NULL); 1173da6c28aaSamw if (error) { 1174fa9e4066Sahrens if (strcmp(name, "..") == 0) 1175fa9e4066Sahrens error = EISDIR; 1176fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1177da6c28aaSamw if (aclp) 1178da6c28aaSamw zfs_acl_free(aclp); 1179da6c28aaSamw return (error); 1180da6c28aaSamw } 1181da6c28aaSamw } 1182da6c28aaSamw if (vsecp && aclp == NULL) { 1183da6c28aaSamw error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, &aclp); 1184da6c28aaSamw if (error) { 1185da6c28aaSamw ZFS_EXIT(zfsvfs); 1186da6c28aaSamw if (dl) 1187da6c28aaSamw zfs_dirent_unlock(dl); 1188fa9e4066Sahrens return (error); 1189fa9e4066Sahrens } 1190fa9e4066Sahrens } 1191fa9e4066Sahrens 1192fa9e4066Sahrens if (zp == NULL) { 1193da6c28aaSamw uint64_t txtype; 1194da6c28aaSamw 1195fa9e4066Sahrens /* 1196fa9e4066Sahrens * Create a new file object and update the directory 1197fa9e4066Sahrens * to reference it. 1198fa9e4066Sahrens */ 1199da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 1200fa9e4066Sahrens goto out; 1201fa9e4066Sahrens } 1202fa9e4066Sahrens 1203fa9e4066Sahrens /* 1204fa9e4066Sahrens * We only support the creation of regular files in 1205fa9e4066Sahrens * extended attribute directories. 1206fa9e4066Sahrens */ 1207fa9e4066Sahrens if ((dzp->z_phys->zp_flags & ZFS_XATTR) && 1208fa9e4066Sahrens (vap->va_type != VREG)) { 1209fa9e4066Sahrens error = EINVAL; 1210fa9e4066Sahrens goto out; 1211fa9e4066Sahrens } 1212fa9e4066Sahrens 1213fa9e4066Sahrens tx = dmu_tx_create(os); 1214fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 1215c1ce5987SMark Shellenbaum if ((aclp && aclp->z_has_fuids) || IS_EPHEMERAL(uid) || 1216c1ce5987SMark Shellenbaum IS_EPHEMERAL(gid)) { 12174c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 12184c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 12194c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 12204c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 12214c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, 12224c841f60Smarks FALSE, NULL); 12234c841f60Smarks } else { 12244c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 12254c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 12264c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 12274c841f60Smarks } 1228da6c28aaSamw } 1229fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 1230ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 1231da6c28aaSamw if ((dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) || aclp) { 1232fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1233fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1234da6c28aaSamw } 1235*1209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1236fa9e4066Sahrens if (error) { 1237fa9e4066Sahrens zfs_dirent_unlock(dl); 1238*1209a471SNeil Perrin if (error == ERESTART) { 12398a2f1b91Sahrens dmu_tx_wait(tx); 12408a2f1b91Sahrens dmu_tx_abort(tx); 1241fa9e4066Sahrens goto top; 1242fa9e4066Sahrens } 12438a2f1b91Sahrens dmu_tx_abort(tx); 1244fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1245da6c28aaSamw if (aclp) 1246da6c28aaSamw zfs_acl_free(aclp); 1247fa9e4066Sahrens return (error); 1248fa9e4066Sahrens } 12494ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, aclp, &fuidp); 1250fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1251da6c28aaSamw txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); 1252da6c28aaSamw if (flag & FIGNORECASE) 1253da6c28aaSamw txtype |= TX_CI; 1254da6c28aaSamw zfs_log_create(zilog, tx, txtype, dzp, zp, name, 1255da6c28aaSamw vsecp, fuidp, vap); 1256da6c28aaSamw if (fuidp) 1257da6c28aaSamw zfs_fuid_info_free(fuidp); 1258fa9e4066Sahrens dmu_tx_commit(tx); 1259fa9e4066Sahrens } else { 1260da6c28aaSamw int aflags = (flag & FAPPEND) ? V_APPEND : 0; 1261da6c28aaSamw 1262fa9e4066Sahrens /* 1263fa9e4066Sahrens * A directory entry already exists for this name. 1264fa9e4066Sahrens */ 1265fa9e4066Sahrens /* 1266fa9e4066Sahrens * Can't truncate an existing file if in exclusive mode. 1267fa9e4066Sahrens */ 1268fa9e4066Sahrens if (excl == EXCL) { 1269fa9e4066Sahrens error = EEXIST; 1270fa9e4066Sahrens goto out; 1271fa9e4066Sahrens } 1272fa9e4066Sahrens /* 1273fa9e4066Sahrens * Can't open a directory for writing. 1274fa9e4066Sahrens */ 1275fa9e4066Sahrens if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1276fa9e4066Sahrens error = EISDIR; 1277fa9e4066Sahrens goto out; 1278fa9e4066Sahrens } 1279fa9e4066Sahrens /* 1280fa9e4066Sahrens * Verify requested access to file. 1281fa9e4066Sahrens */ 1282da6c28aaSamw if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) { 1283fa9e4066Sahrens goto out; 1284fa9e4066Sahrens } 1285fa9e4066Sahrens 1286fa9e4066Sahrens mutex_enter(&dzp->z_lock); 1287fa9e4066Sahrens dzp->z_seq++; 1288fa9e4066Sahrens mutex_exit(&dzp->z_lock); 1289fa9e4066Sahrens 12905730cc9aSmaybee /* 12915730cc9aSmaybee * Truncate regular files if requested. 12925730cc9aSmaybee */ 12935730cc9aSmaybee if ((ZTOV(zp)->v_type == VREG) && 1294fa9e4066Sahrens (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 1295cdb0ab79Smaybee /* we can't hold any locks when calling zfs_freesp() */ 1296cdb0ab79Smaybee zfs_dirent_unlock(dl); 1297cdb0ab79Smaybee dl = NULL; 12985730cc9aSmaybee error = zfs_freesp(zp, 0, 0, mode, TRUE); 1299df2381bfSpraks if (error == 0) { 1300da6c28aaSamw vnevent_create(ZTOV(zp), ct); 1301df2381bfSpraks } 1302fa9e4066Sahrens } 1303fa9e4066Sahrens } 1304fa9e4066Sahrens out: 1305fa9e4066Sahrens 1306fa9e4066Sahrens if (dl) 1307fa9e4066Sahrens zfs_dirent_unlock(dl); 1308fa9e4066Sahrens 1309fa9e4066Sahrens if (error) { 1310fa9e4066Sahrens if (zp) 1311fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1312fa9e4066Sahrens } else { 1313fa9e4066Sahrens *vpp = ZTOV(zp); 1314fa9e4066Sahrens /* 1315fa9e4066Sahrens * If vnode is for a device return a specfs vnode instead. 1316fa9e4066Sahrens */ 1317fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1318fa9e4066Sahrens struct vnode *svp; 1319fa9e4066Sahrens 1320fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1321fa9e4066Sahrens VN_RELE(*vpp); 1322fa9e4066Sahrens if (svp == NULL) { 1323fa9e4066Sahrens error = ENOSYS; 1324fa9e4066Sahrens } 1325fa9e4066Sahrens *vpp = svp; 1326fa9e4066Sahrens } 1327fa9e4066Sahrens } 1328da6c28aaSamw if (aclp) 1329da6c28aaSamw zfs_acl_free(aclp); 1330fa9e4066Sahrens 1331fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1332fa9e4066Sahrens return (error); 1333fa9e4066Sahrens } 1334fa9e4066Sahrens 1335fa9e4066Sahrens /* 1336fa9e4066Sahrens * Remove an entry from a directory. 1337fa9e4066Sahrens * 1338fa9e4066Sahrens * IN: dvp - vnode of directory to remove entry from. 1339fa9e4066Sahrens * name - name of entry to remove. 1340fa9e4066Sahrens * cr - credentials of caller. 1341da6c28aaSamw * ct - caller context 1342da6c28aaSamw * flags - case flags 1343fa9e4066Sahrens * 1344fa9e4066Sahrens * RETURN: 0 if success 1345fa9e4066Sahrens * error code if failure 1346fa9e4066Sahrens * 1347fa9e4066Sahrens * Timestamps: 1348fa9e4066Sahrens * dvp - ctime|mtime 1349fa9e4066Sahrens * vp - ctime (if nlink > 0) 1350fa9e4066Sahrens */ 1351da6c28aaSamw /*ARGSUSED*/ 1352fa9e4066Sahrens static int 1353da6c28aaSamw zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct, 1354da6c28aaSamw int flags) 1355fa9e4066Sahrens { 1356fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1357fa9e4066Sahrens znode_t *xzp = NULL; 1358fa9e4066Sahrens vnode_t *vp; 1359fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1360f18faf3fSek zilog_t *zilog; 1361fa9e4066Sahrens uint64_t acl_obj, xattr_obj; 1362fa9e4066Sahrens zfs_dirlock_t *dl; 1363fa9e4066Sahrens dmu_tx_t *tx; 1364893a6d32Sahrens boolean_t may_delete_now, delete_now = FALSE; 1365cdb0ab79Smaybee boolean_t unlinked, toobig = FALSE; 1366da6c28aaSamw uint64_t txtype; 1367da6c28aaSamw pathname_t *realnmp = NULL; 1368da6c28aaSamw pathname_t realnm; 1369fa9e4066Sahrens int error; 1370da6c28aaSamw int zflg = ZEXISTS; 1371fa9e4066Sahrens 13723cb34c60Sahrens ZFS_ENTER(zfsvfs); 13733cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1374f18faf3fSek zilog = zfsvfs->z_log; 1375fa9e4066Sahrens 1376da6c28aaSamw if (flags & FIGNORECASE) { 1377da6c28aaSamw zflg |= ZCILOOK; 1378da6c28aaSamw pn_alloc(&realnm); 1379da6c28aaSamw realnmp = &realnm; 1380da6c28aaSamw } 1381da6c28aaSamw 1382fa9e4066Sahrens top: 1383fa9e4066Sahrens /* 1384fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1385fa9e4066Sahrens */ 1386da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1387da6c28aaSamw NULL, realnmp)) { 1388da6c28aaSamw if (realnmp) 1389da6c28aaSamw pn_free(realnmp); 1390fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1391fa9e4066Sahrens return (error); 1392fa9e4066Sahrens } 1393fa9e4066Sahrens 1394fa9e4066Sahrens vp = ZTOV(zp); 1395fa9e4066Sahrens 1396fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1397fa9e4066Sahrens goto out; 1398fa9e4066Sahrens } 1399fa9e4066Sahrens 1400fa9e4066Sahrens /* 1401fa9e4066Sahrens * Need to use rmdir for removing directories. 1402fa9e4066Sahrens */ 1403fa9e4066Sahrens if (vp->v_type == VDIR) { 1404fa9e4066Sahrens error = EPERM; 1405fa9e4066Sahrens goto out; 1406fa9e4066Sahrens } 1407fa9e4066Sahrens 1408da6c28aaSamw vnevent_remove(vp, dvp, name, ct); 1409fa9e4066Sahrens 1410da6c28aaSamw if (realnmp) 1411ab04eb8eStimh dnlc_remove(dvp, realnmp->pn_buf); 1412da6c28aaSamw else 1413da6c28aaSamw dnlc_remove(dvp, name); 1414033f9833Sek 1415fa9e4066Sahrens mutex_enter(&vp->v_lock); 1416fa9e4066Sahrens may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1417fa9e4066Sahrens mutex_exit(&vp->v_lock); 1418fa9e4066Sahrens 1419fa9e4066Sahrens /* 1420893a6d32Sahrens * We may delete the znode now, or we may put it in the unlinked set; 1421fa9e4066Sahrens * it depends on whether we're the last link, and on whether there are 1422fa9e4066Sahrens * other holds on the vnode. So we dmu_tx_hold() the right things to 1423fa9e4066Sahrens * allow for either case. 1424fa9e4066Sahrens */ 1425fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1426ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1427fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1428cdb0ab79Smaybee if (may_delete_now) { 1429cdb0ab79Smaybee toobig = 1430cdb0ab79Smaybee zp->z_phys->zp_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT; 1431cdb0ab79Smaybee /* if the file is too big, only hold_free a token amount */ 1432cdb0ab79Smaybee dmu_tx_hold_free(tx, zp->z_id, 0, 1433cdb0ab79Smaybee (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END)); 1434cdb0ab79Smaybee } 1435fa9e4066Sahrens 1436fa9e4066Sahrens /* are there any extended attributes? */ 1437fa9e4066Sahrens if ((xattr_obj = zp->z_phys->zp_xattr) != 0) { 1438fa9e4066Sahrens /* XXX - do we need this if we are deleting? */ 1439fa9e4066Sahrens dmu_tx_hold_bonus(tx, xattr_obj); 1440fa9e4066Sahrens } 1441fa9e4066Sahrens 1442fa9e4066Sahrens /* are there any additional acls */ 1443fa9e4066Sahrens if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 && 1444fa9e4066Sahrens may_delete_now) 1445fa9e4066Sahrens dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1446fa9e4066Sahrens 1447fa9e4066Sahrens /* charge as an update -- would be nice not to charge at all */ 1448893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1449fa9e4066Sahrens 1450*1209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1451fa9e4066Sahrens if (error) { 1452fa9e4066Sahrens zfs_dirent_unlock(dl); 1453fa9e4066Sahrens VN_RELE(vp); 1454*1209a471SNeil Perrin if (error == ERESTART) { 14558a2f1b91Sahrens dmu_tx_wait(tx); 14568a2f1b91Sahrens dmu_tx_abort(tx); 1457fa9e4066Sahrens goto top; 1458fa9e4066Sahrens } 1459da6c28aaSamw if (realnmp) 1460da6c28aaSamw pn_free(realnmp); 14618a2f1b91Sahrens dmu_tx_abort(tx); 1462fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1463fa9e4066Sahrens return (error); 1464fa9e4066Sahrens } 1465fa9e4066Sahrens 1466fa9e4066Sahrens /* 1467fa9e4066Sahrens * Remove the directory entry. 1468fa9e4066Sahrens */ 1469da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked); 1470fa9e4066Sahrens 1471fa9e4066Sahrens if (error) { 1472fa9e4066Sahrens dmu_tx_commit(tx); 1473fa9e4066Sahrens goto out; 1474fa9e4066Sahrens } 1475fa9e4066Sahrens 1476893a6d32Sahrens if (unlinked) { 1477fa9e4066Sahrens mutex_enter(&vp->v_lock); 1478cdb0ab79Smaybee delete_now = may_delete_now && !toobig && 1479fa9e4066Sahrens vp->v_count == 1 && !vn_has_cached_data(vp) && 1480fa9e4066Sahrens zp->z_phys->zp_xattr == xattr_obj && 1481fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj; 1482fa9e4066Sahrens mutex_exit(&vp->v_lock); 1483fa9e4066Sahrens } 1484fa9e4066Sahrens 1485fa9e4066Sahrens if (delete_now) { 1486fa9e4066Sahrens if (zp->z_phys->zp_xattr) { 1487fa9e4066Sahrens error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp); 1488fa9e4066Sahrens ASSERT3U(error, ==, 0); 1489fa9e4066Sahrens ASSERT3U(xzp->z_phys->zp_links, ==, 2); 1490fa9e4066Sahrens dmu_buf_will_dirty(xzp->z_dbuf, tx); 1491fa9e4066Sahrens mutex_enter(&xzp->z_lock); 1492893a6d32Sahrens xzp->z_unlinked = 1; 1493fa9e4066Sahrens xzp->z_phys->zp_links = 0; 1494fa9e4066Sahrens mutex_exit(&xzp->z_lock); 1495893a6d32Sahrens zfs_unlinked_add(xzp, tx); 1496fa9e4066Sahrens zp->z_phys->zp_xattr = 0; /* probably unnecessary */ 1497fa9e4066Sahrens } 1498fa9e4066Sahrens mutex_enter(&zp->z_lock); 1499fa9e4066Sahrens mutex_enter(&vp->v_lock); 1500fa9e4066Sahrens vp->v_count--; 1501fa9e4066Sahrens ASSERT3U(vp->v_count, ==, 0); 1502fa9e4066Sahrens mutex_exit(&vp->v_lock); 1503fa9e4066Sahrens mutex_exit(&zp->z_lock); 1504fa9e4066Sahrens zfs_znode_delete(zp, tx); 1505893a6d32Sahrens } else if (unlinked) { 1506893a6d32Sahrens zfs_unlinked_add(zp, tx); 1507fa9e4066Sahrens } 1508fa9e4066Sahrens 1509da6c28aaSamw txtype = TX_REMOVE; 1510da6c28aaSamw if (flags & FIGNORECASE) 1511da6c28aaSamw txtype |= TX_CI; 1512da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1513fa9e4066Sahrens 1514fa9e4066Sahrens dmu_tx_commit(tx); 1515fa9e4066Sahrens out: 1516da6c28aaSamw if (realnmp) 1517da6c28aaSamw pn_free(realnmp); 1518da6c28aaSamw 1519fa9e4066Sahrens zfs_dirent_unlock(dl); 1520fa9e4066Sahrens 1521fa9e4066Sahrens if (!delete_now) { 1522fa9e4066Sahrens VN_RELE(vp); 1523fa9e4066Sahrens } else if (xzp) { 1524cdb0ab79Smaybee /* this rele is delayed to prevent nesting transactions */ 1525fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 1526fa9e4066Sahrens } 1527fa9e4066Sahrens 1528fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1529fa9e4066Sahrens return (error); 1530fa9e4066Sahrens } 1531fa9e4066Sahrens 1532fa9e4066Sahrens /* 1533fa9e4066Sahrens * Create a new directory and insert it into dvp using the name 1534fa9e4066Sahrens * provided. Return a pointer to the inserted directory. 1535fa9e4066Sahrens * 1536fa9e4066Sahrens * IN: dvp - vnode of directory to add subdir to. 1537fa9e4066Sahrens * dirname - name of new directory. 1538fa9e4066Sahrens * vap - attributes of new directory. 1539fa9e4066Sahrens * cr - credentials of caller. 1540da6c28aaSamw * ct - caller context 1541da6c28aaSamw * vsecp - ACL to be set 1542fa9e4066Sahrens * 1543fa9e4066Sahrens * OUT: vpp - vnode of created directory. 1544fa9e4066Sahrens * 1545fa9e4066Sahrens * RETURN: 0 if success 1546fa9e4066Sahrens * error code if failure 1547fa9e4066Sahrens * 1548fa9e4066Sahrens * Timestamps: 1549fa9e4066Sahrens * dvp - ctime|mtime updated 1550fa9e4066Sahrens * vp - ctime|mtime|atime updated 1551fa9e4066Sahrens */ 1552da6c28aaSamw /*ARGSUSED*/ 1553fa9e4066Sahrens static int 1554da6c28aaSamw zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr, 1555da6c28aaSamw caller_context_t *ct, int flags, vsecattr_t *vsecp) 1556fa9e4066Sahrens { 1557fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1558fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1559f18faf3fSek zilog_t *zilog; 1560fa9e4066Sahrens zfs_dirlock_t *dl; 1561da6c28aaSamw uint64_t txtype; 1562fa9e4066Sahrens dmu_tx_t *tx; 1563fa9e4066Sahrens int error; 1564da6c28aaSamw zfs_acl_t *aclp = NULL; 1565da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 1566da6c28aaSamw int zf = ZNEW; 1567c1ce5987SMark Shellenbaum ksid_t *ksid; 1568c1ce5987SMark Shellenbaum uid_t uid; 1569c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 1570fa9e4066Sahrens 1571fa9e4066Sahrens ASSERT(vap->va_type == VDIR); 1572fa9e4066Sahrens 1573da6c28aaSamw /* 1574da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1575da6c28aaSamw * make sure file system is at proper version 1576da6c28aaSamw */ 1577da6c28aaSamw 1578c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 1579c1ce5987SMark Shellenbaum if (ksid) 1580c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 1581c1ce5987SMark Shellenbaum else 1582c1ce5987SMark Shellenbaum uid = crgetuid(cr); 1583da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1584c1ce5987SMark Shellenbaum (vsecp || (vap->va_mask & AT_XVATTR) || 1585756962ecSMark Shellenbaum IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1586da6c28aaSamw return (EINVAL); 1587da6c28aaSamw 15883cb34c60Sahrens ZFS_ENTER(zfsvfs); 15893cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1590f18faf3fSek zilog = zfsvfs->z_log; 1591fa9e4066Sahrens 1592fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) { 1593fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1594fa9e4066Sahrens return (EINVAL); 1595fa9e4066Sahrens } 1596da6c28aaSamw 1597de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(dirname, 1598da6c28aaSamw strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1599da6c28aaSamw ZFS_EXIT(zfsvfs); 1600da6c28aaSamw return (EILSEQ); 1601da6c28aaSamw } 1602da6c28aaSamw if (flags & FIGNORECASE) 1603da6c28aaSamw zf |= ZCILOOK; 1604da6c28aaSamw 1605da6c28aaSamw if (vap->va_mask & AT_XVATTR) 1606da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1607da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1608da6c28aaSamw ZFS_EXIT(zfsvfs); 1609da6c28aaSamw return (error); 1610da6c28aaSamw } 1611fa9e4066Sahrens 1612fa9e4066Sahrens /* 1613fa9e4066Sahrens * First make sure the new directory doesn't exist. 1614fa9e4066Sahrens */ 1615da6c28aaSamw top: 1616da6c28aaSamw *vpp = NULL; 1617da6c28aaSamw 1618da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf, 1619da6c28aaSamw NULL, NULL)) { 1620fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1621fa9e4066Sahrens return (error); 1622fa9e4066Sahrens } 1623fa9e4066Sahrens 1624da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) { 1625d2443e76Smarks zfs_dirent_unlock(dl); 1626d2443e76Smarks ZFS_EXIT(zfsvfs); 1627d2443e76Smarks return (error); 1628d2443e76Smarks } 1629d2443e76Smarks 1630da6c28aaSamw if (vsecp && aclp == NULL) { 1631da6c28aaSamw error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, &aclp); 1632da6c28aaSamw if (error) { 1633da6c28aaSamw zfs_dirent_unlock(dl); 1634da6c28aaSamw ZFS_EXIT(zfsvfs); 1635da6c28aaSamw return (error); 1636da6c28aaSamw } 1637da6c28aaSamw } 1638fa9e4066Sahrens /* 1639fa9e4066Sahrens * Add a new entry to the directory. 1640fa9e4066Sahrens */ 1641fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1642ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 1643ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 1644c1ce5987SMark Shellenbaum if ((aclp && aclp->z_has_fuids) || IS_EPHEMERAL(uid) || 1645c1ce5987SMark Shellenbaum IS_EPHEMERAL(gid)) { 16464c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 16474c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 16484c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 16494c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 16504c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); 16514c841f60Smarks } else { 16524c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 16534c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 16544c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 16554c841f60Smarks } 1656da6c28aaSamw } 1657da6c28aaSamw if ((dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) || aclp) 1658fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1659fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1660*1209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1661fa9e4066Sahrens if (error) { 1662fa9e4066Sahrens zfs_dirent_unlock(dl); 1663*1209a471SNeil Perrin if (error == ERESTART) { 16648a2f1b91Sahrens dmu_tx_wait(tx); 16658a2f1b91Sahrens dmu_tx_abort(tx); 1666fa9e4066Sahrens goto top; 1667fa9e4066Sahrens } 16688a2f1b91Sahrens dmu_tx_abort(tx); 1669fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1670da6c28aaSamw if (aclp) 1671da6c28aaSamw zfs_acl_free(aclp); 1672fa9e4066Sahrens return (error); 1673fa9e4066Sahrens } 1674fa9e4066Sahrens 1675fa9e4066Sahrens /* 1676fa9e4066Sahrens * Create new node. 1677fa9e4066Sahrens */ 16784ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, aclp, &fuidp); 1679da6c28aaSamw 1680da6c28aaSamw if (aclp) 1681da6c28aaSamw zfs_acl_free(aclp); 1682fa9e4066Sahrens 1683fa9e4066Sahrens /* 1684fa9e4066Sahrens * Now put new name in parent dir. 1685fa9e4066Sahrens */ 1686fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1687fa9e4066Sahrens 1688fa9e4066Sahrens *vpp = ZTOV(zp); 1689fa9e4066Sahrens 1690da6c28aaSamw txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap); 1691da6c28aaSamw if (flags & FIGNORECASE) 1692da6c28aaSamw txtype |= TX_CI; 1693da6c28aaSamw zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, fuidp, vap); 1694da6c28aaSamw 1695da6c28aaSamw if (fuidp) 1696da6c28aaSamw zfs_fuid_info_free(fuidp); 1697fa9e4066Sahrens dmu_tx_commit(tx); 1698fa9e4066Sahrens 1699fa9e4066Sahrens zfs_dirent_unlock(dl); 1700fa9e4066Sahrens 1701fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1702fa9e4066Sahrens return (0); 1703fa9e4066Sahrens } 1704fa9e4066Sahrens 1705fa9e4066Sahrens /* 1706fa9e4066Sahrens * Remove a directory subdir entry. If the current working 1707fa9e4066Sahrens * directory is the same as the subdir to be removed, the 1708fa9e4066Sahrens * remove will fail. 1709fa9e4066Sahrens * 1710fa9e4066Sahrens * IN: dvp - vnode of directory to remove from. 1711fa9e4066Sahrens * name - name of directory to be removed. 1712fa9e4066Sahrens * cwd - vnode of current working directory. 1713fa9e4066Sahrens * cr - credentials of caller. 1714da6c28aaSamw * ct - caller context 1715da6c28aaSamw * flags - case flags 1716fa9e4066Sahrens * 1717fa9e4066Sahrens * RETURN: 0 if success 1718fa9e4066Sahrens * error code if failure 1719fa9e4066Sahrens * 1720fa9e4066Sahrens * Timestamps: 1721fa9e4066Sahrens * dvp - ctime|mtime updated 1722fa9e4066Sahrens */ 1723da6c28aaSamw /*ARGSUSED*/ 1724fa9e4066Sahrens static int 1725da6c28aaSamw zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr, 1726da6c28aaSamw caller_context_t *ct, int flags) 1727fa9e4066Sahrens { 1728fa9e4066Sahrens znode_t *dzp = VTOZ(dvp); 1729fa9e4066Sahrens znode_t *zp; 1730fa9e4066Sahrens vnode_t *vp; 1731fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1732f18faf3fSek zilog_t *zilog; 1733fa9e4066Sahrens zfs_dirlock_t *dl; 1734fa9e4066Sahrens dmu_tx_t *tx; 1735fa9e4066Sahrens int error; 1736da6c28aaSamw int zflg = ZEXISTS; 1737fa9e4066Sahrens 17383cb34c60Sahrens ZFS_ENTER(zfsvfs); 17393cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1740f18faf3fSek zilog = zfsvfs->z_log; 1741fa9e4066Sahrens 1742da6c28aaSamw if (flags & FIGNORECASE) 1743da6c28aaSamw zflg |= ZCILOOK; 1744fa9e4066Sahrens top: 1745fa9e4066Sahrens zp = NULL; 1746fa9e4066Sahrens 1747fa9e4066Sahrens /* 1748fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1749fa9e4066Sahrens */ 1750da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1751da6c28aaSamw NULL, NULL)) { 1752fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1753fa9e4066Sahrens return (error); 1754fa9e4066Sahrens } 1755fa9e4066Sahrens 1756fa9e4066Sahrens vp = ZTOV(zp); 1757fa9e4066Sahrens 1758fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1759fa9e4066Sahrens goto out; 1760fa9e4066Sahrens } 1761fa9e4066Sahrens 1762fa9e4066Sahrens if (vp->v_type != VDIR) { 1763fa9e4066Sahrens error = ENOTDIR; 1764fa9e4066Sahrens goto out; 1765fa9e4066Sahrens } 1766fa9e4066Sahrens 1767fa9e4066Sahrens if (vp == cwd) { 1768fa9e4066Sahrens error = EINVAL; 1769fa9e4066Sahrens goto out; 1770fa9e4066Sahrens } 1771fa9e4066Sahrens 1772da6c28aaSamw vnevent_rmdir(vp, dvp, name, ct); 1773fa9e4066Sahrens 1774fa9e4066Sahrens /* 1775af2c4821Smaybee * Grab a lock on the directory to make sure that noone is 1776af2c4821Smaybee * trying to add (or lookup) entries while we are removing it. 1777af2c4821Smaybee */ 1778af2c4821Smaybee rw_enter(&zp->z_name_lock, RW_WRITER); 1779af2c4821Smaybee 1780af2c4821Smaybee /* 1781af2c4821Smaybee * Grab a lock on the parent pointer to make sure we play well 1782fa9e4066Sahrens * with the treewalk and directory rename code. 1783fa9e4066Sahrens */ 1784fa9e4066Sahrens rw_enter(&zp->z_parent_lock, RW_WRITER); 1785fa9e4066Sahrens 1786fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1787ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1788fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1789893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1790*1209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1791fa9e4066Sahrens if (error) { 1792fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1793af2c4821Smaybee rw_exit(&zp->z_name_lock); 1794fa9e4066Sahrens zfs_dirent_unlock(dl); 1795fa9e4066Sahrens VN_RELE(vp); 1796*1209a471SNeil Perrin if (error == ERESTART) { 17978a2f1b91Sahrens dmu_tx_wait(tx); 17988a2f1b91Sahrens dmu_tx_abort(tx); 1799fa9e4066Sahrens goto top; 1800fa9e4066Sahrens } 18018a2f1b91Sahrens dmu_tx_abort(tx); 1802fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1803fa9e4066Sahrens return (error); 1804fa9e4066Sahrens } 1805fa9e4066Sahrens 1806da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, NULL); 1807fa9e4066Sahrens 1808da6c28aaSamw if (error == 0) { 1809da6c28aaSamw uint64_t txtype = TX_RMDIR; 1810da6c28aaSamw if (flags & FIGNORECASE) 1811da6c28aaSamw txtype |= TX_CI; 1812da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1813da6c28aaSamw } 1814fa9e4066Sahrens 1815fa9e4066Sahrens dmu_tx_commit(tx); 1816fa9e4066Sahrens 1817fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1818af2c4821Smaybee rw_exit(&zp->z_name_lock); 1819fa9e4066Sahrens out: 1820fa9e4066Sahrens zfs_dirent_unlock(dl); 1821fa9e4066Sahrens 1822fa9e4066Sahrens VN_RELE(vp); 1823fa9e4066Sahrens 1824fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1825fa9e4066Sahrens return (error); 1826fa9e4066Sahrens } 1827fa9e4066Sahrens 1828fa9e4066Sahrens /* 1829fa9e4066Sahrens * Read as many directory entries as will fit into the provided 1830fa9e4066Sahrens * buffer from the given directory cursor position (specified in 1831fa9e4066Sahrens * the uio structure. 1832fa9e4066Sahrens * 1833fa9e4066Sahrens * IN: vp - vnode of directory to read. 1834fa9e4066Sahrens * uio - structure supplying read location, range info, 1835fa9e4066Sahrens * and return buffer. 1836fa9e4066Sahrens * cr - credentials of caller. 1837da6c28aaSamw * ct - caller context 1838da6c28aaSamw * flags - case flags 1839fa9e4066Sahrens * 1840fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 1841fa9e4066Sahrens * eofp - set to true if end-of-file detected. 1842fa9e4066Sahrens * 1843fa9e4066Sahrens * RETURN: 0 if success 1844fa9e4066Sahrens * error code if failure 1845fa9e4066Sahrens * 1846fa9e4066Sahrens * Timestamps: 1847fa9e4066Sahrens * vp - atime updated 1848fa9e4066Sahrens * 1849fa9e4066Sahrens * Note that the low 4 bits of the cookie returned by zap is always zero. 1850fa9e4066Sahrens * This allows us to use the low range for "special" directory entries: 1851fa9e4066Sahrens * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 1852fa9e4066Sahrens * we use the offset 2 for the '.zfs' directory. 1853fa9e4066Sahrens */ 1854fa9e4066Sahrens /* ARGSUSED */ 1855fa9e4066Sahrens static int 1856da6c28aaSamw zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, 1857da6c28aaSamw caller_context_t *ct, int flags) 1858fa9e4066Sahrens { 1859fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1860fa9e4066Sahrens iovec_t *iovp; 1861da6c28aaSamw edirent_t *eodp; 1862fa9e4066Sahrens dirent64_t *odp; 1863fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 18647f6e3e7dSperrin objset_t *os; 1865fa9e4066Sahrens caddr_t outbuf; 1866fa9e4066Sahrens size_t bufsize; 1867fa9e4066Sahrens zap_cursor_t zc; 1868fa9e4066Sahrens zap_attribute_t zap; 1869fa9e4066Sahrens uint_t bytes_wanted; 1870fa9e4066Sahrens uint64_t offset; /* must be unsigned; checks for < 1 */ 1871fa9e4066Sahrens int local_eof; 18727f6e3e7dSperrin int outcount; 18737f6e3e7dSperrin int error; 18747f6e3e7dSperrin uint8_t prefetch; 1875b38f0970Sck boolean_t check_sysattrs; 1876fa9e4066Sahrens 18773cb34c60Sahrens ZFS_ENTER(zfsvfs); 18783cb34c60Sahrens ZFS_VERIFY_ZP(zp); 1879fa9e4066Sahrens 1880fa9e4066Sahrens /* 1881fa9e4066Sahrens * If we are not given an eof variable, 1882fa9e4066Sahrens * use a local one. 1883fa9e4066Sahrens */ 1884fa9e4066Sahrens if (eofp == NULL) 1885fa9e4066Sahrens eofp = &local_eof; 1886fa9e4066Sahrens 1887fa9e4066Sahrens /* 1888fa9e4066Sahrens * Check for valid iov_len. 1889fa9e4066Sahrens */ 1890fa9e4066Sahrens if (uio->uio_iov->iov_len <= 0) { 1891fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1892fa9e4066Sahrens return (EINVAL); 1893fa9e4066Sahrens } 1894fa9e4066Sahrens 1895fa9e4066Sahrens /* 1896fa9e4066Sahrens * Quit if directory has been removed (posix) 1897fa9e4066Sahrens */ 1898893a6d32Sahrens if ((*eofp = zp->z_unlinked) != 0) { 1899fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1900fa9e4066Sahrens return (0); 1901fa9e4066Sahrens } 1902fa9e4066Sahrens 19037f6e3e7dSperrin error = 0; 19047f6e3e7dSperrin os = zfsvfs->z_os; 19057f6e3e7dSperrin offset = uio->uio_loffset; 19067f6e3e7dSperrin prefetch = zp->z_zn_prefetch; 19077f6e3e7dSperrin 1908fa9e4066Sahrens /* 1909fa9e4066Sahrens * Initialize the iterator cursor. 1910fa9e4066Sahrens */ 1911fa9e4066Sahrens if (offset <= 3) { 1912fa9e4066Sahrens /* 1913fa9e4066Sahrens * Start iteration from the beginning of the directory. 1914fa9e4066Sahrens */ 19157f6e3e7dSperrin zap_cursor_init(&zc, os, zp->z_id); 1916fa9e4066Sahrens } else { 1917fa9e4066Sahrens /* 1918fa9e4066Sahrens * The offset is a serialized cursor. 1919fa9e4066Sahrens */ 19207f6e3e7dSperrin zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 1921fa9e4066Sahrens } 1922fa9e4066Sahrens 1923fa9e4066Sahrens /* 1924fa9e4066Sahrens * Get space to change directory entries into fs independent format. 1925fa9e4066Sahrens */ 1926fa9e4066Sahrens iovp = uio->uio_iov; 1927fa9e4066Sahrens bytes_wanted = iovp->iov_len; 1928fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 1929fa9e4066Sahrens bufsize = bytes_wanted; 1930fa9e4066Sahrens outbuf = kmem_alloc(bufsize, KM_SLEEP); 1931fa9e4066Sahrens odp = (struct dirent64 *)outbuf; 1932fa9e4066Sahrens } else { 1933fa9e4066Sahrens bufsize = bytes_wanted; 1934fa9e4066Sahrens odp = (struct dirent64 *)iovp->iov_base; 1935fa9e4066Sahrens } 1936da6c28aaSamw eodp = (struct edirent *)odp; 1937fa9e4066Sahrens 1938b38f0970Sck /* 19399660e5cbSJanice Chang * If this VFS supports the system attribute view interface; and 19409660e5cbSJanice Chang * we're looking at an extended attribute directory; and we care 19419660e5cbSJanice Chang * about normalization conflicts on this vfs; then we must check 19429660e5cbSJanice Chang * for normalization conflicts with the sysattr name space. 1943b38f0970Sck */ 19449660e5cbSJanice Chang check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 1945b38f0970Sck (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm && 1946b38f0970Sck (flags & V_RDDIR_ENTFLAGS); 1947b38f0970Sck 1948fa9e4066Sahrens /* 1949fa9e4066Sahrens * Transform to file-system independent format 1950fa9e4066Sahrens */ 1951fa9e4066Sahrens outcount = 0; 1952fa9e4066Sahrens while (outcount < bytes_wanted) { 1953b1b8ab34Slling ino64_t objnum; 1954b1b8ab34Slling ushort_t reclen; 1955b1b8ab34Slling off64_t *next; 1956b1b8ab34Slling 1957fa9e4066Sahrens /* 1958fa9e4066Sahrens * Special case `.', `..', and `.zfs'. 1959fa9e4066Sahrens */ 1960fa9e4066Sahrens if (offset == 0) { 1961fa9e4066Sahrens (void) strcpy(zap.za_name, "."); 1962da6c28aaSamw zap.za_normalization_conflict = 0; 1963b1b8ab34Slling objnum = zp->z_id; 1964fa9e4066Sahrens } else if (offset == 1) { 1965fa9e4066Sahrens (void) strcpy(zap.za_name, ".."); 1966da6c28aaSamw zap.za_normalization_conflict = 0; 1967b1b8ab34Slling objnum = zp->z_phys->zp_parent; 1968fa9e4066Sahrens } else if (offset == 2 && zfs_show_ctldir(zp)) { 1969fa9e4066Sahrens (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 1970da6c28aaSamw zap.za_normalization_conflict = 0; 1971b1b8ab34Slling objnum = ZFSCTL_INO_ROOT; 1972fa9e4066Sahrens } else { 1973fa9e4066Sahrens /* 1974fa9e4066Sahrens * Grab next entry. 1975fa9e4066Sahrens */ 1976fa9e4066Sahrens if (error = zap_cursor_retrieve(&zc, &zap)) { 1977fa9e4066Sahrens if ((*eofp = (error == ENOENT)) != 0) 1978fa9e4066Sahrens break; 1979fa9e4066Sahrens else 1980fa9e4066Sahrens goto update; 1981fa9e4066Sahrens } 1982fa9e4066Sahrens 1983fa9e4066Sahrens if (zap.za_integer_length != 8 || 1984fa9e4066Sahrens zap.za_num_integers != 1) { 1985fa9e4066Sahrens cmn_err(CE_WARN, "zap_readdir: bad directory " 1986fa9e4066Sahrens "entry, obj = %lld, offset = %lld\n", 1987fa9e4066Sahrens (u_longlong_t)zp->z_id, 1988fa9e4066Sahrens (u_longlong_t)offset); 1989fa9e4066Sahrens error = ENXIO; 1990fa9e4066Sahrens goto update; 1991fa9e4066Sahrens } 1992b1b8ab34Slling 1993b1b8ab34Slling objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); 1994b1b8ab34Slling /* 1995b1b8ab34Slling * MacOS X can extract the object type here such as: 1996b1b8ab34Slling * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); 1997b1b8ab34Slling */ 1998b38f0970Sck 1999b38f0970Sck if (check_sysattrs && !zap.za_normalization_conflict) { 2000b38f0970Sck zap.za_normalization_conflict = 2001b38f0970Sck xattr_sysattr_casechk(zap.za_name); 2002b38f0970Sck } 2003fa9e4066Sahrens } 2004da6c28aaSamw 2005da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) 2006da6c28aaSamw reclen = EDIRENT_RECLEN(strlen(zap.za_name)); 2007da6c28aaSamw else 2008da6c28aaSamw reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 2009fa9e4066Sahrens 2010fa9e4066Sahrens /* 2011fa9e4066Sahrens * Will this entry fit in the buffer? 2012fa9e4066Sahrens */ 2013b1b8ab34Slling if (outcount + reclen > bufsize) { 2014fa9e4066Sahrens /* 2015fa9e4066Sahrens * Did we manage to fit anything in the buffer? 2016fa9e4066Sahrens */ 2017fa9e4066Sahrens if (!outcount) { 2018fa9e4066Sahrens error = EINVAL; 2019fa9e4066Sahrens goto update; 2020fa9e4066Sahrens } 2021fa9e4066Sahrens break; 2022fa9e4066Sahrens } 2023da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) { 2024da6c28aaSamw /* 2025da6c28aaSamw * Add extended flag entry: 2026da6c28aaSamw */ 2027da6c28aaSamw eodp->ed_ino = objnum; 2028da6c28aaSamw eodp->ed_reclen = reclen; 2029da6c28aaSamw /* NOTE: ed_off is the offset for the *next* entry */ 2030da6c28aaSamw next = &(eodp->ed_off); 2031da6c28aaSamw eodp->ed_eflags = zap.za_normalization_conflict ? 2032da6c28aaSamw ED_CASE_CONFLICT : 0; 2033da6c28aaSamw (void) strncpy(eodp->ed_name, zap.za_name, 2034da6c28aaSamw EDIRENT_NAMELEN(reclen)); 2035da6c28aaSamw eodp = (edirent_t *)((intptr_t)eodp + reclen); 2036da6c28aaSamw } else { 2037da6c28aaSamw /* 2038da6c28aaSamw * Add normal entry: 2039da6c28aaSamw */ 2040da6c28aaSamw odp->d_ino = objnum; 2041da6c28aaSamw odp->d_reclen = reclen; 2042da6c28aaSamw /* NOTE: d_off is the offset for the *next* entry */ 2043da6c28aaSamw next = &(odp->d_off); 2044da6c28aaSamw (void) strncpy(odp->d_name, zap.za_name, 2045da6c28aaSamw DIRENT64_NAMELEN(reclen)); 2046da6c28aaSamw odp = (dirent64_t *)((intptr_t)odp + reclen); 2047da6c28aaSamw } 2048b1b8ab34Slling outcount += reclen; 2049fa9e4066Sahrens 2050fa9e4066Sahrens ASSERT(outcount <= bufsize); 2051fa9e4066Sahrens 2052fa9e4066Sahrens /* Prefetch znode */ 20537f6e3e7dSperrin if (prefetch) 2054b1b8ab34Slling dmu_prefetch(os, objnum, 0, 0); 2055fa9e4066Sahrens 2056fa9e4066Sahrens /* 2057fa9e4066Sahrens * Move to the next entry, fill in the previous offset. 2058fa9e4066Sahrens */ 2059fa9e4066Sahrens if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 2060fa9e4066Sahrens zap_cursor_advance(&zc); 2061fa9e4066Sahrens offset = zap_cursor_serialize(&zc); 2062fa9e4066Sahrens } else { 2063fa9e4066Sahrens offset += 1; 2064fa9e4066Sahrens } 2065fa9e4066Sahrens *next = offset; 2066fa9e4066Sahrens } 20677f6e3e7dSperrin zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 2068fa9e4066Sahrens 2069fa9e4066Sahrens if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 2070fa9e4066Sahrens iovp->iov_base += outcount; 2071fa9e4066Sahrens iovp->iov_len -= outcount; 2072fa9e4066Sahrens uio->uio_resid -= outcount; 2073fa9e4066Sahrens } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 2074fa9e4066Sahrens /* 2075fa9e4066Sahrens * Reset the pointer. 2076fa9e4066Sahrens */ 2077fa9e4066Sahrens offset = uio->uio_loffset; 2078fa9e4066Sahrens } 2079fa9e4066Sahrens 2080fa9e4066Sahrens update: 208187e5029aSahrens zap_cursor_fini(&zc); 2082fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2083fa9e4066Sahrens kmem_free(outbuf, bufsize); 2084fa9e4066Sahrens 2085fa9e4066Sahrens if (error == ENOENT) 2086fa9e4066Sahrens error = 0; 2087fa9e4066Sahrens 2088fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2089fa9e4066Sahrens 2090fa9e4066Sahrens uio->uio_loffset = offset; 2091fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2092fa9e4066Sahrens return (error); 2093fa9e4066Sahrens } 2094fa9e4066Sahrens 2095ec533521Sfr ulong_t zfs_fsync_sync_cnt = 4; 2096ec533521Sfr 2097fa9e4066Sahrens static int 2098da6c28aaSamw zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 2099fa9e4066Sahrens { 2100fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2101fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2102fa9e4066Sahrens 2103b468a217Seschrock /* 2104b468a217Seschrock * Regardless of whether this is required for standards conformance, 2105b468a217Seschrock * this is the logical behavior when fsync() is called on a file with 2106b468a217Seschrock * dirty pages. We use B_ASYNC since the ZIL transactions are already 2107b468a217Seschrock * going to be pushed out as part of the zil_commit(). 2108b468a217Seschrock */ 2109b468a217Seschrock if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && 2110b468a217Seschrock (vp->v_type == VREG) && !(IS_SWAPVP(vp))) 2111da6c28aaSamw (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr, ct); 2112b468a217Seschrock 2113ec533521Sfr (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt); 2114ec533521Sfr 21153cb34c60Sahrens ZFS_ENTER(zfsvfs); 21163cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2117b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 2118fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2119fa9e4066Sahrens return (0); 2120fa9e4066Sahrens } 2121fa9e4066Sahrens 2122da6c28aaSamw 2123fa9e4066Sahrens /* 2124fa9e4066Sahrens * Get the requested file attributes and place them in the provided 2125fa9e4066Sahrens * vattr structure. 2126fa9e4066Sahrens * 2127fa9e4066Sahrens * IN: vp - vnode of file. 2128fa9e4066Sahrens * vap - va_mask identifies requested attributes. 2129da6c28aaSamw * If AT_XVATTR set, then optional attrs are requested 2130da6c28aaSamw * flags - ATTR_NOACLCHECK (CIFS server context) 2131fa9e4066Sahrens * cr - credentials of caller. 2132da6c28aaSamw * ct - caller context 2133fa9e4066Sahrens * 2134fa9e4066Sahrens * OUT: vap - attribute values. 2135fa9e4066Sahrens * 2136fa9e4066Sahrens * RETURN: 0 (always succeeds) 2137fa9e4066Sahrens */ 2138fa9e4066Sahrens /* ARGSUSED */ 2139fa9e4066Sahrens static int 2140da6c28aaSamw zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2141da6c28aaSamw caller_context_t *ct) 2142fa9e4066Sahrens { 2143fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2144fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2145f18faf3fSek znode_phys_t *pzp; 2146da6c28aaSamw int error = 0; 2147ecd6cf80Smarks uint64_t links; 2148da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2149da6c28aaSamw xoptattr_t *xoap = NULL; 2150da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2151fa9e4066Sahrens 21523cb34c60Sahrens ZFS_ENTER(zfsvfs); 21533cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2154f18faf3fSek pzp = zp->z_phys; 2155fa9e4066Sahrens 2156da6c28aaSamw mutex_enter(&zp->z_lock); 2157da6c28aaSamw 2158da6c28aaSamw /* 2159da6c28aaSamw * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 2160da6c28aaSamw * Also, if we are the owner don't bother, since owner should 2161da6c28aaSamw * always be allowed to read basic attributes of file. 2162da6c28aaSamw */ 2163da6c28aaSamw if (!(pzp->zp_flags & ZFS_ACL_TRIVIAL) && 2164da6c28aaSamw (pzp->zp_uid != crgetuid(cr))) { 2165da6c28aaSamw if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0, 2166da6c28aaSamw skipaclchk, cr)) { 2167da6c28aaSamw mutex_exit(&zp->z_lock); 2168da6c28aaSamw ZFS_EXIT(zfsvfs); 2169da6c28aaSamw return (error); 2170da6c28aaSamw } 2171da6c28aaSamw } 2172da6c28aaSamw 2173fa9e4066Sahrens /* 2174fa9e4066Sahrens * Return all attributes. It's cheaper to provide the answer 2175fa9e4066Sahrens * than to determine whether we were asked the question. 2176fa9e4066Sahrens */ 2177fa9e4066Sahrens 2178fa9e4066Sahrens vap->va_type = vp->v_type; 2179fa9e4066Sahrens vap->va_mode = pzp->zp_mode & MODEMASK; 2180bda89588Sjp zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid); 2181fa9e4066Sahrens vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 2182fa9e4066Sahrens vap->va_nodeid = zp->z_id; 2183ecd6cf80Smarks if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp)) 2184ecd6cf80Smarks links = pzp->zp_links + 1; 2185ecd6cf80Smarks else 2186ecd6cf80Smarks links = pzp->zp_links; 2187ecd6cf80Smarks vap->va_nlink = MIN(links, UINT32_MAX); /* nlink_t limit! */ 2188fa9e4066Sahrens vap->va_size = pzp->zp_size; 218972fc53bcSmarks vap->va_rdev = vp->v_rdev; 2190fa9e4066Sahrens vap->va_seq = zp->z_seq; 2191fa9e4066Sahrens 2192fa9e4066Sahrens /* 2193da6c28aaSamw * Add in any requested optional attributes and the create time. 2194da6c28aaSamw * Also set the corresponding bits in the returned attribute bitmap. 2195fa9e4066Sahrens */ 2196da6c28aaSamw if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) { 2197da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 2198da6c28aaSamw xoap->xoa_archive = 2199da6c28aaSamw ((pzp->zp_flags & ZFS_ARCHIVE) != 0); 2200da6c28aaSamw XVA_SET_RTN(xvap, XAT_ARCHIVE); 2201da6c28aaSamw } 2202da6c28aaSamw 2203da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 2204da6c28aaSamw xoap->xoa_readonly = 2205da6c28aaSamw ((pzp->zp_flags & ZFS_READONLY) != 0); 2206da6c28aaSamw XVA_SET_RTN(xvap, XAT_READONLY); 2207da6c28aaSamw } 2208da6c28aaSamw 2209da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 2210da6c28aaSamw xoap->xoa_system = 2211da6c28aaSamw ((pzp->zp_flags & ZFS_SYSTEM) != 0); 2212da6c28aaSamw XVA_SET_RTN(xvap, XAT_SYSTEM); 2213da6c28aaSamw } 2214da6c28aaSamw 2215da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 2216da6c28aaSamw xoap->xoa_hidden = 2217da6c28aaSamw ((pzp->zp_flags & ZFS_HIDDEN) != 0); 2218da6c28aaSamw XVA_SET_RTN(xvap, XAT_HIDDEN); 2219da6c28aaSamw } 2220da6c28aaSamw 2221da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2222da6c28aaSamw xoap->xoa_nounlink = 2223da6c28aaSamw ((pzp->zp_flags & ZFS_NOUNLINK) != 0); 2224da6c28aaSamw XVA_SET_RTN(xvap, XAT_NOUNLINK); 2225da6c28aaSamw } 2226da6c28aaSamw 2227da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2228da6c28aaSamw xoap->xoa_immutable = 2229da6c28aaSamw ((pzp->zp_flags & ZFS_IMMUTABLE) != 0); 2230da6c28aaSamw XVA_SET_RTN(xvap, XAT_IMMUTABLE); 2231da6c28aaSamw } 2232da6c28aaSamw 2233da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2234da6c28aaSamw xoap->xoa_appendonly = 2235da6c28aaSamw ((pzp->zp_flags & ZFS_APPENDONLY) != 0); 2236da6c28aaSamw XVA_SET_RTN(xvap, XAT_APPENDONLY); 2237da6c28aaSamw } 2238da6c28aaSamw 2239da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2240da6c28aaSamw xoap->xoa_nodump = 2241da6c28aaSamw ((pzp->zp_flags & ZFS_NODUMP) != 0); 2242da6c28aaSamw XVA_SET_RTN(xvap, XAT_NODUMP); 2243da6c28aaSamw } 2244da6c28aaSamw 2245da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 2246da6c28aaSamw xoap->xoa_opaque = 2247da6c28aaSamw ((pzp->zp_flags & ZFS_OPAQUE) != 0); 2248da6c28aaSamw XVA_SET_RTN(xvap, XAT_OPAQUE); 2249da6c28aaSamw } 2250da6c28aaSamw 2251da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2252da6c28aaSamw xoap->xoa_av_quarantined = 2253da6c28aaSamw ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0); 2254da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 2255da6c28aaSamw } 2256da6c28aaSamw 2257da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2258da6c28aaSamw xoap->xoa_av_modified = 2259da6c28aaSamw ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0); 2260da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 2261da6c28aaSamw } 2262da6c28aaSamw 2263da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) && 2264da6c28aaSamw vp->v_type == VREG && 2265da6c28aaSamw (pzp->zp_flags & ZFS_BONUS_SCANSTAMP)) { 2266da6c28aaSamw size_t len; 2267da6c28aaSamw dmu_object_info_t doi; 2268da6c28aaSamw 2269da6c28aaSamw /* 2270da6c28aaSamw * Only VREG files have anti-virus scanstamps, so we 2271da6c28aaSamw * won't conflict with symlinks in the bonus buffer. 2272da6c28aaSamw */ 2273da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2274da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2275da6c28aaSamw sizeof (znode_phys_t); 2276da6c28aaSamw if (len <= doi.doi_bonus_size) { 2277da6c28aaSamw /* 2278da6c28aaSamw * pzp points to the start of the 2279da6c28aaSamw * znode_phys_t. pzp + 1 points to the 2280da6c28aaSamw * first byte after the znode_phys_t. 2281da6c28aaSamw */ 2282da6c28aaSamw (void) memcpy(xoap->xoa_av_scanstamp, 2283da6c28aaSamw pzp + 1, 2284da6c28aaSamw sizeof (xoap->xoa_av_scanstamp)); 2285da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); 2286da6c28aaSamw } 2287da6c28aaSamw } 2288da6c28aaSamw 2289da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 2290da6c28aaSamw ZFS_TIME_DECODE(&xoap->xoa_createtime, pzp->zp_crtime); 2291da6c28aaSamw XVA_SET_RTN(xvap, XAT_CREATETIME); 2292fa9e4066Sahrens } 2293fa9e4066Sahrens } 2294fa9e4066Sahrens 2295da6c28aaSamw ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime); 2296da6c28aaSamw ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime); 2297da6c28aaSamw ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime); 2298da6c28aaSamw 2299fa9e4066Sahrens mutex_exit(&zp->z_lock); 2300fa9e4066Sahrens 2301fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks); 2302fa9e4066Sahrens 2303fa9e4066Sahrens if (zp->z_blksz == 0) { 2304fa9e4066Sahrens /* 2305fa9e4066Sahrens * Block size hasn't been set; suggest maximal I/O transfers. 2306fa9e4066Sahrens */ 2307fa9e4066Sahrens vap->va_blksize = zfsvfs->z_max_blksz; 2308fa9e4066Sahrens } 2309fa9e4066Sahrens 2310fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2311fa9e4066Sahrens return (0); 2312fa9e4066Sahrens } 2313fa9e4066Sahrens 2314fa9e4066Sahrens /* 2315fa9e4066Sahrens * Set the file attributes to the values contained in the 2316fa9e4066Sahrens * vattr structure. 2317fa9e4066Sahrens * 2318fa9e4066Sahrens * IN: vp - vnode of file to be modified. 2319fa9e4066Sahrens * vap - new attribute values. 2320da6c28aaSamw * If AT_XVATTR set, then optional attrs are being set 2321fa9e4066Sahrens * flags - ATTR_UTIME set if non-default time values provided. 2322da6c28aaSamw * - ATTR_NOACLCHECK (CIFS context only). 2323fa9e4066Sahrens * cr - credentials of caller. 2324da6c28aaSamw * ct - caller context 2325fa9e4066Sahrens * 2326fa9e4066Sahrens * RETURN: 0 if success 2327fa9e4066Sahrens * error code if failure 2328fa9e4066Sahrens * 2329fa9e4066Sahrens * Timestamps: 2330fa9e4066Sahrens * vp - ctime updated, mtime updated if size changed. 2331fa9e4066Sahrens */ 2332fa9e4066Sahrens /* ARGSUSED */ 2333fa9e4066Sahrens static int 2334fa9e4066Sahrens zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2335fa9e4066Sahrens caller_context_t *ct) 2336fa9e4066Sahrens { 2337f18faf3fSek znode_t *zp = VTOZ(vp); 2338f18faf3fSek znode_phys_t *pzp; 2339fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2340f18faf3fSek zilog_t *zilog; 2341fa9e4066Sahrens dmu_tx_t *tx; 2342fa9e4066Sahrens vattr_t oldva; 2343ae4caef8SMark Shellenbaum xvattr_t tmpxvattr; 23445730cc9aSmaybee uint_t mask = vap->va_mask; 23455730cc9aSmaybee uint_t saved_mask; 2346f92daba9Smarks int trim_mask = 0; 2347fa9e4066Sahrens uint64_t new_mode; 2348d2443e76Smarks znode_t *attrzp; 2349fa9e4066Sahrens int need_policy = FALSE; 2350fa9e4066Sahrens int err; 2351da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 2352da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2353da6c28aaSamw xoptattr_t *xoap; 23544c841f60Smarks zfs_acl_t *aclp = NULL; 2355da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2356fa9e4066Sahrens 2357fa9e4066Sahrens if (mask == 0) 2358fa9e4066Sahrens return (0); 2359fa9e4066Sahrens 2360fa9e4066Sahrens if (mask & AT_NOSET) 2361fa9e4066Sahrens return (EINVAL); 2362fa9e4066Sahrens 23633cb34c60Sahrens ZFS_ENTER(zfsvfs); 23643cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2365da6c28aaSamw 2366da6c28aaSamw pzp = zp->z_phys; 2367da6c28aaSamw zilog = zfsvfs->z_log; 2368da6c28aaSamw 2369da6c28aaSamw /* 2370da6c28aaSamw * Make sure that if we have ephemeral uid/gid or xvattr specified 2371da6c28aaSamw * that file system is at proper version level 2372da6c28aaSamw */ 2373da6c28aaSamw 2374da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 2375da6c28aaSamw (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 2376da6c28aaSamw ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) || 237702dcba3bStimh (mask & AT_XVATTR))) { 237802dcba3bStimh ZFS_EXIT(zfsvfs); 2379da6c28aaSamw return (EINVAL); 238002dcba3bStimh } 2381da6c28aaSamw 238202dcba3bStimh if (mask & AT_SIZE && vp->v_type == VDIR) { 238302dcba3bStimh ZFS_EXIT(zfsvfs); 2384fa9e4066Sahrens return (EISDIR); 238502dcba3bStimh } 2386fa9e4066Sahrens 238702dcba3bStimh if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) { 238802dcba3bStimh ZFS_EXIT(zfsvfs); 238984c5a155Smarks return (EINVAL); 239002dcba3bStimh } 239184c5a155Smarks 2392da6c28aaSamw /* 2393da6c28aaSamw * If this is an xvattr_t, then get a pointer to the structure of 2394da6c28aaSamw * optional attributes. If this is NULL, then we have a vattr_t. 2395da6c28aaSamw */ 2396da6c28aaSamw xoap = xva_getxoptattr(xvap); 2397da6c28aaSamw 2398ae4caef8SMark Shellenbaum xva_init(&tmpxvattr); 2399ae4caef8SMark Shellenbaum 2400da6c28aaSamw /* 2401da6c28aaSamw * Immutable files can only alter immutable bit and atime 2402da6c28aaSamw */ 2403da6c28aaSamw if ((pzp->zp_flags & ZFS_IMMUTABLE) && 2404da6c28aaSamw ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) || 240502dcba3bStimh ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { 240602dcba3bStimh ZFS_EXIT(zfsvfs); 2407da6c28aaSamw return (EPERM); 240802dcba3bStimh } 2409da6c28aaSamw 241002dcba3bStimh if ((mask & AT_SIZE) && (pzp->zp_flags & ZFS_READONLY)) { 241102dcba3bStimh ZFS_EXIT(zfsvfs); 2412da6c28aaSamw return (EPERM); 241302dcba3bStimh } 2414fa9e4066Sahrens 241593129341Smarks /* 241693129341Smarks * Verify timestamps doesn't overflow 32 bits. 241793129341Smarks * ZFS can handle large timestamps, but 32bit syscalls can't 241893129341Smarks * handle times greater than 2039. This check should be removed 241993129341Smarks * once large timestamps are fully supported. 242093129341Smarks */ 242193129341Smarks if (mask & (AT_ATIME | AT_MTIME)) { 242293129341Smarks if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || 242393129341Smarks ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { 242493129341Smarks ZFS_EXIT(zfsvfs); 242593129341Smarks return (EOVERFLOW); 242693129341Smarks } 242793129341Smarks } 242893129341Smarks 2429fa9e4066Sahrens top: 2430d2443e76Smarks attrzp = NULL; 2431fa9e4066Sahrens 2432fa9e4066Sahrens if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 2433fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2434fa9e4066Sahrens return (EROFS); 2435fa9e4066Sahrens } 2436fa9e4066Sahrens 2437fa9e4066Sahrens /* 2438fa9e4066Sahrens * First validate permissions 2439fa9e4066Sahrens */ 2440fa9e4066Sahrens 2441fa9e4066Sahrens if (mask & AT_SIZE) { 2442da6c28aaSamw err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr); 2443fa9e4066Sahrens if (err) { 2444fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2445fa9e4066Sahrens return (err); 2446fa9e4066Sahrens } 24475730cc9aSmaybee /* 24485730cc9aSmaybee * XXX - Note, we are not providing any open 24495730cc9aSmaybee * mode flags here (like FNDELAY), so we may 24505730cc9aSmaybee * block if there are locks present... this 24515730cc9aSmaybee * should be addressed in openat(). 24525730cc9aSmaybee */ 2453cdb0ab79Smaybee /* XXX - would it be OK to generate a log record here? */ 2454cdb0ab79Smaybee err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 24555730cc9aSmaybee if (err) { 24565730cc9aSmaybee ZFS_EXIT(zfsvfs); 24575730cc9aSmaybee return (err); 24585730cc9aSmaybee } 2459fa9e4066Sahrens } 2460fa9e4066Sahrens 2461da6c28aaSamw if (mask & (AT_ATIME|AT_MTIME) || 2462da6c28aaSamw ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || 2463da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_READONLY) || 2464da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || 2465da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_CREATETIME) || 2466da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) 2467da6c28aaSamw need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, 2468da6c28aaSamw skipaclchk, cr); 2469fa9e4066Sahrens 2470fa9e4066Sahrens if (mask & (AT_UID|AT_GID)) { 2471fa9e4066Sahrens int idmask = (mask & (AT_UID|AT_GID)); 2472fa9e4066Sahrens int take_owner; 2473fa9e4066Sahrens int take_group; 2474fa9e4066Sahrens 2475a933bc41Smarks /* 2476a933bc41Smarks * NOTE: even if a new mode is being set, 2477a933bc41Smarks * we may clear S_ISUID/S_ISGID bits. 2478a933bc41Smarks */ 2479a933bc41Smarks 2480a933bc41Smarks if (!(mask & AT_MODE)) 2481a933bc41Smarks vap->va_mode = pzp->zp_mode; 2482a933bc41Smarks 2483fa9e4066Sahrens /* 2484fa9e4066Sahrens * Take ownership or chgrp to group we are a member of 2485fa9e4066Sahrens */ 2486fa9e4066Sahrens 2487fa9e4066Sahrens take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 2488da6c28aaSamw take_group = (mask & AT_GID) && 2489da6c28aaSamw zfs_groupmember(zfsvfs, vap->va_gid, cr); 2490fa9e4066Sahrens 2491fa9e4066Sahrens /* 2492fa9e4066Sahrens * If both AT_UID and AT_GID are set then take_owner and 2493fa9e4066Sahrens * take_group must both be set in order to allow taking 2494fa9e4066Sahrens * ownership. 2495fa9e4066Sahrens * 2496fa9e4066Sahrens * Otherwise, send the check through secpolicy_vnode_setattr() 2497fa9e4066Sahrens * 2498fa9e4066Sahrens */ 2499fa9e4066Sahrens 2500fa9e4066Sahrens if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 2501fa9e4066Sahrens ((idmask == AT_UID) && take_owner) || 2502fa9e4066Sahrens ((idmask == AT_GID) && take_group)) { 2503da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, 2504da6c28aaSamw skipaclchk, cr) == 0) { 2505fa9e4066Sahrens /* 2506fa9e4066Sahrens * Remove setuid/setgid for non-privileged users 2507fa9e4066Sahrens */ 250813f9f30eSmarks secpolicy_setid_clear(vap, cr); 2509f92daba9Smarks trim_mask = (mask & (AT_UID|AT_GID)); 2510fa9e4066Sahrens } else { 2511fa9e4066Sahrens need_policy = TRUE; 2512fa9e4066Sahrens } 2513fa9e4066Sahrens } else { 2514fa9e4066Sahrens need_policy = TRUE; 2515fa9e4066Sahrens } 2516fa9e4066Sahrens } 2517fa9e4066Sahrens 2518f92daba9Smarks mutex_enter(&zp->z_lock); 2519f92daba9Smarks oldva.va_mode = pzp->zp_mode; 2520bda89588Sjp zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); 2521da6c28aaSamw if (mask & AT_XVATTR) { 2522ae4caef8SMark Shellenbaum /* 2523ae4caef8SMark Shellenbaum * Update xvattr mask to include only those attributes 2524ae4caef8SMark Shellenbaum * that are actually changing. 2525ae4caef8SMark Shellenbaum * 2526ae4caef8SMark Shellenbaum * the bits will be restored prior to actually setting 2527ae4caef8SMark Shellenbaum * the attributes so the caller thinks they were set. 2528ae4caef8SMark Shellenbaum */ 2529ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2530ae4caef8SMark Shellenbaum if (xoap->xoa_appendonly != 2531ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_APPENDONLY) != 0)) { 2532ae4caef8SMark Shellenbaum need_policy = TRUE; 2533ae4caef8SMark Shellenbaum } else { 2534ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_APPENDONLY); 2535ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY); 2536ae4caef8SMark Shellenbaum } 2537ae4caef8SMark Shellenbaum } 2538ae4caef8SMark Shellenbaum 2539ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2540ae4caef8SMark Shellenbaum if (xoap->xoa_nounlink != 2541ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_NOUNLINK) != 0)) { 2542ae4caef8SMark Shellenbaum need_policy = TRUE; 2543ae4caef8SMark Shellenbaum } else { 2544ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_NOUNLINK); 2545ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK); 2546ae4caef8SMark Shellenbaum } 2547ae4caef8SMark Shellenbaum } 2548ae4caef8SMark Shellenbaum 2549ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2550ae4caef8SMark Shellenbaum if (xoap->xoa_immutable != 2551ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_IMMUTABLE) != 0)) { 2552ae4caef8SMark Shellenbaum need_policy = TRUE; 2553ae4caef8SMark Shellenbaum } else { 2554ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_IMMUTABLE); 2555ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE); 2556ae4caef8SMark Shellenbaum } 2557ae4caef8SMark Shellenbaum } 2558ae4caef8SMark Shellenbaum 2559ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2560ae4caef8SMark Shellenbaum if (xoap->xoa_nodump != 2561ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_NODUMP) != 0)) { 2562ae4caef8SMark Shellenbaum need_policy = TRUE; 2563ae4caef8SMark Shellenbaum } else { 2564ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_NODUMP); 2565ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_NODUMP); 2566ae4caef8SMark Shellenbaum } 2567ae4caef8SMark Shellenbaum } 2568ae4caef8SMark Shellenbaum 2569ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2570ae4caef8SMark Shellenbaum if (xoap->xoa_av_modified != 2571ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0)) { 2572ae4caef8SMark Shellenbaum need_policy = TRUE; 2573ae4caef8SMark Shellenbaum } else { 2574ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_AV_MODIFIED); 2575ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED); 2576ae4caef8SMark Shellenbaum } 2577ae4caef8SMark Shellenbaum } 2578ae4caef8SMark Shellenbaum 2579ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2580ae4caef8SMark Shellenbaum if ((vp->v_type != VREG && 2581ae4caef8SMark Shellenbaum xoap->xoa_av_quarantined) || 2582ae4caef8SMark Shellenbaum xoap->xoa_av_quarantined != 2583ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0)) { 2584ae4caef8SMark Shellenbaum need_policy = TRUE; 2585ae4caef8SMark Shellenbaum } else { 2586ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED); 2587ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED); 2588ae4caef8SMark Shellenbaum } 2589ae4caef8SMark Shellenbaum } 2590ae4caef8SMark Shellenbaum 2591ae4caef8SMark Shellenbaum if (need_policy == FALSE && 2592ae4caef8SMark Shellenbaum (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) || 2593ae4caef8SMark Shellenbaum XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { 2594da6c28aaSamw need_policy = TRUE; 2595da6c28aaSamw } 2596da6c28aaSamw } 2597da6c28aaSamw 2598f92daba9Smarks mutex_exit(&zp->z_lock); 2599fa9e4066Sahrens 2600f92daba9Smarks if (mask & AT_MODE) { 2601da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) { 2602f92daba9Smarks err = secpolicy_setid_setsticky_clear(vp, vap, 2603f92daba9Smarks &oldva, cr); 2604f92daba9Smarks if (err) { 2605f92daba9Smarks ZFS_EXIT(zfsvfs); 2606f92daba9Smarks return (err); 2607f92daba9Smarks } 2608f92daba9Smarks trim_mask |= AT_MODE; 2609f92daba9Smarks } else { 2610f92daba9Smarks need_policy = TRUE; 2611f92daba9Smarks } 2612f92daba9Smarks } 261313f9f30eSmarks 2614f92daba9Smarks if (need_policy) { 261513f9f30eSmarks /* 261613f9f30eSmarks * If trim_mask is set then take ownership 2617f92daba9Smarks * has been granted or write_acl is present and user 2618f92daba9Smarks * has the ability to modify mode. In that case remove 2619f92daba9Smarks * UID|GID and or MODE from mask so that 262013f9f30eSmarks * secpolicy_vnode_setattr() doesn't revoke it. 262113f9f30eSmarks */ 262213f9f30eSmarks 2623f92daba9Smarks if (trim_mask) { 2624f92daba9Smarks saved_mask = vap->va_mask; 2625f92daba9Smarks vap->va_mask &= ~trim_mask; 2626f92daba9Smarks } 2627fa9e4066Sahrens err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 2628da6c28aaSamw (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp); 2629fa9e4066Sahrens if (err) { 2630fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2631fa9e4066Sahrens return (err); 2632fa9e4066Sahrens } 263313f9f30eSmarks 263413f9f30eSmarks if (trim_mask) 2635f92daba9Smarks vap->va_mask |= saved_mask; 2636fa9e4066Sahrens } 2637fa9e4066Sahrens 2638fa9e4066Sahrens /* 2639fa9e4066Sahrens * secpolicy_vnode_setattr, or take ownership may have 2640fa9e4066Sahrens * changed va_mask 2641fa9e4066Sahrens */ 2642fa9e4066Sahrens mask = vap->va_mask; 2643fa9e4066Sahrens 2644fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2645fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 26464c841f60Smarks if (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 26474c841f60Smarks ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid))) { 26484c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 26494c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 26504c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 26514c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 26524c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); 26534c841f60Smarks } else { 26544c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 26554c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 26564c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 26574c841f60Smarks } 2658da6c28aaSamw } 2659fa9e4066Sahrens 2660fa9e4066Sahrens if (mask & AT_MODE) { 2661169cdae2Smarks uint64_t pmode = pzp->zp_mode; 2662fa9e4066Sahrens 2663169cdae2Smarks new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 2664fa9e4066Sahrens 26654c841f60Smarks if (err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)) { 26664c841f60Smarks dmu_tx_abort(tx); 26674c841f60Smarks ZFS_EXIT(zfsvfs); 26684c841f60Smarks return (err); 26694c841f60Smarks } 2670da6c28aaSamw if (pzp->zp_acl.z_acl_extern_obj) { 2671da6c28aaSamw /* Are we upgrading ACL from old V0 format to new V1 */ 2672da6c28aaSamw if (zfsvfs->z_version <= ZPL_VERSION_FUID && 2673da6c28aaSamw pzp->zp_acl.z_acl_version == 2674da6c28aaSamw ZFS_ACL_VERSION_INITIAL) { 2675da6c28aaSamw dmu_tx_hold_free(tx, 2676da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 2677da6c28aaSamw DMU_OBJECT_END); 2678da6c28aaSamw dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 26794c841f60Smarks 0, aclp->z_acl_bytes); 2680da6c28aaSamw } else { 2681da6c28aaSamw dmu_tx_hold_write(tx, 2682da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 26834c841f60Smarks aclp->z_acl_bytes); 26844c841f60Smarks } 26856d38e247Smarks } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) { 26866d38e247Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 26876d38e247Smarks 0, aclp->z_acl_bytes); 2688da6c28aaSamw } 2689fa9e4066Sahrens } 2690fa9e4066Sahrens 2691da6c28aaSamw if ((mask & (AT_UID | AT_GID)) && pzp->zp_xattr != 0) { 2692da6c28aaSamw err = zfs_zget(zp->z_zfsvfs, pzp->zp_xattr, &attrzp); 2693d2443e76Smarks if (err) { 2694d2443e76Smarks dmu_tx_abort(tx); 2695d2443e76Smarks ZFS_EXIT(zfsvfs); 26964c841f60Smarks if (aclp) 26974c841f60Smarks zfs_acl_free(aclp); 2698d2443e76Smarks return (err); 2699d2443e76Smarks } 2700d2443e76Smarks dmu_tx_hold_bonus(tx, attrzp->z_id); 2701d2443e76Smarks } 2702d2443e76Smarks 2703*1209a471SNeil Perrin err = dmu_tx_assign(tx, TXG_NOWAIT); 2704fa9e4066Sahrens if (err) { 2705d2443e76Smarks if (attrzp) 2706d2443e76Smarks VN_RELE(ZTOV(attrzp)); 27074c841f60Smarks 27084c841f60Smarks if (aclp) { 27094c841f60Smarks zfs_acl_free(aclp); 27104c841f60Smarks aclp = NULL; 27114c841f60Smarks } 27124c841f60Smarks 2713*1209a471SNeil Perrin if (err == ERESTART) { 27148a2f1b91Sahrens dmu_tx_wait(tx); 27158a2f1b91Sahrens dmu_tx_abort(tx); 2716fa9e4066Sahrens goto top; 2717fa9e4066Sahrens } 27188a2f1b91Sahrens dmu_tx_abort(tx); 2719fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2720fa9e4066Sahrens return (err); 2721fa9e4066Sahrens } 2722fa9e4066Sahrens 2723fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 2724fa9e4066Sahrens 2725fa9e4066Sahrens /* 2726fa9e4066Sahrens * Set each attribute requested. 2727fa9e4066Sahrens * We group settings according to the locks they need to acquire. 2728fa9e4066Sahrens * 2729fa9e4066Sahrens * Note: you cannot set ctime directly, although it will be 2730fa9e4066Sahrens * updated as a side-effect of calling this function. 2731fa9e4066Sahrens */ 2732fa9e4066Sahrens 2733fa9e4066Sahrens mutex_enter(&zp->z_lock); 2734fa9e4066Sahrens 2735fa9e4066Sahrens if (mask & AT_MODE) { 27364c841f60Smarks mutex_enter(&zp->z_acl_lock); 27374c841f60Smarks zp->z_phys->zp_mode = new_mode; 27384c841f60Smarks err = zfs_aclset_common(zp, aclp, cr, &fuidp, tx); 2739fa9e4066Sahrens ASSERT3U(err, ==, 0); 27404c841f60Smarks mutex_exit(&zp->z_acl_lock); 2741fa9e4066Sahrens } 2742fa9e4066Sahrens 2743d2443e76Smarks if (attrzp) 2744d2443e76Smarks mutex_enter(&attrzp->z_lock); 2745d2443e76Smarks 2746d2443e76Smarks if (mask & AT_UID) { 2747da6c28aaSamw pzp->zp_uid = zfs_fuid_create(zfsvfs, 2748bda89588Sjp vap->va_uid, cr, ZFS_OWNER, tx, &fuidp); 2749d2443e76Smarks if (attrzp) { 2750da6c28aaSamw attrzp->z_phys->zp_uid = zfs_fuid_create(zfsvfs, 2751bda89588Sjp vap->va_uid, cr, ZFS_OWNER, tx, &fuidp); 2752d2443e76Smarks } 2753d2443e76Smarks } 2754fa9e4066Sahrens 2755d2443e76Smarks if (mask & AT_GID) { 2756da6c28aaSamw pzp->zp_gid = zfs_fuid_create(zfsvfs, vap->va_gid, 2757bda89588Sjp cr, ZFS_GROUP, tx, &fuidp); 2758d2443e76Smarks if (attrzp) 2759da6c28aaSamw attrzp->z_phys->zp_gid = zfs_fuid_create(zfsvfs, 2760bda89588Sjp vap->va_gid, cr, ZFS_GROUP, tx, &fuidp); 2761d2443e76Smarks } 2762d2443e76Smarks 27634c841f60Smarks if (aclp) 27644c841f60Smarks zfs_acl_free(aclp); 27654c841f60Smarks 2766d2443e76Smarks if (attrzp) 2767d2443e76Smarks mutex_exit(&attrzp->z_lock); 2768fa9e4066Sahrens 2769fa9e4066Sahrens if (mask & AT_ATIME) 2770fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 2771fa9e4066Sahrens 2772fa9e4066Sahrens if (mask & AT_MTIME) 2773fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 2774fa9e4066Sahrens 2775cdb0ab79Smaybee /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */ 27765730cc9aSmaybee if (mask & AT_SIZE) 2777fa9e4066Sahrens zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx); 27785730cc9aSmaybee else if (mask != 0) 2779fa9e4066Sahrens zfs_time_stamper_locked(zp, STATE_CHANGED, tx); 2780da6c28aaSamw /* 2781da6c28aaSamw * Do this after setting timestamps to prevent timestamp 2782da6c28aaSamw * update from toggling bit 2783da6c28aaSamw */ 2784da6c28aaSamw 2785da6c28aaSamw if (xoap && (mask & AT_XVATTR)) { 2786ae4caef8SMark Shellenbaum 2787ae4caef8SMark Shellenbaum /* 2788ae4caef8SMark Shellenbaum * restore trimmed off masks 2789ae4caef8SMark Shellenbaum * so that return masks can be set for caller. 2790ae4caef8SMark Shellenbaum */ 2791ae4caef8SMark Shellenbaum 2792ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) { 2793ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_APPENDONLY); 2794ae4caef8SMark Shellenbaum } 2795ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) { 2796ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_NOUNLINK); 2797ae4caef8SMark Shellenbaum } 2798ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) { 2799ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_IMMUTABLE); 2800ae4caef8SMark Shellenbaum } 2801ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) { 2802ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_NODUMP); 2803ae4caef8SMark Shellenbaum } 2804ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) { 2805ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_AV_MODIFIED); 2806ae4caef8SMark Shellenbaum } 2807ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) { 2808ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_AV_QUARANTINED); 2809ae4caef8SMark Shellenbaum } 2810ae4caef8SMark Shellenbaum 2811da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { 2812da6c28aaSamw size_t len; 2813da6c28aaSamw dmu_object_info_t doi; 2814da6c28aaSamw 2815da6c28aaSamw ASSERT(vp->v_type == VREG); 2816da6c28aaSamw 2817da6c28aaSamw /* Grow the bonus buffer if necessary. */ 2818da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2819da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2820da6c28aaSamw sizeof (znode_phys_t); 2821da6c28aaSamw if (len > doi.doi_bonus_size) 2822da6c28aaSamw VERIFY(dmu_set_bonus(zp->z_dbuf, len, tx) == 0); 2823da6c28aaSamw } 2824da6c28aaSamw zfs_xvattr_set(zp, xvap); 2825da6c28aaSamw } 2826fa9e4066Sahrens 28275730cc9aSmaybee if (mask != 0) 2828da6c28aaSamw zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp); 2829fa9e4066Sahrens 2830da6c28aaSamw if (fuidp) 2831da6c28aaSamw zfs_fuid_info_free(fuidp); 2832fa9e4066Sahrens mutex_exit(&zp->z_lock); 2833fa9e4066Sahrens 2834d2443e76Smarks if (attrzp) 2835d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2836d2443e76Smarks 2837fa9e4066Sahrens dmu_tx_commit(tx); 2838fa9e4066Sahrens 2839fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2840fa9e4066Sahrens return (err); 2841fa9e4066Sahrens } 2842fa9e4066Sahrens 2843fa9e4066Sahrens typedef struct zfs_zlock { 2844fa9e4066Sahrens krwlock_t *zl_rwlock; /* lock we acquired */ 2845fa9e4066Sahrens znode_t *zl_znode; /* znode we held */ 2846fa9e4066Sahrens struct zfs_zlock *zl_next; /* next in list */ 2847fa9e4066Sahrens } zfs_zlock_t; 2848fa9e4066Sahrens 2849ff008e00Smaybee /* 2850ff008e00Smaybee * Drop locks and release vnodes that were held by zfs_rename_lock(). 2851ff008e00Smaybee */ 2852ff008e00Smaybee static void 2853ff008e00Smaybee zfs_rename_unlock(zfs_zlock_t **zlpp) 2854ff008e00Smaybee { 2855ff008e00Smaybee zfs_zlock_t *zl; 2856ff008e00Smaybee 2857ff008e00Smaybee while ((zl = *zlpp) != NULL) { 2858ff008e00Smaybee if (zl->zl_znode != NULL) 2859ff008e00Smaybee VN_RELE(ZTOV(zl->zl_znode)); 2860ff008e00Smaybee rw_exit(zl->zl_rwlock); 2861ff008e00Smaybee *zlpp = zl->zl_next; 2862ff008e00Smaybee kmem_free(zl, sizeof (*zl)); 2863ff008e00Smaybee } 2864ff008e00Smaybee } 2865ff008e00Smaybee 2866ff008e00Smaybee /* 2867ff008e00Smaybee * Search back through the directory tree, using the ".." entries. 2868ff008e00Smaybee * Lock each directory in the chain to prevent concurrent renames. 2869ff008e00Smaybee * Fail any attempt to move a directory into one of its own descendants. 2870ff008e00Smaybee * XXX - z_parent_lock can overlap with map or grow locks 2871ff008e00Smaybee */ 2872fa9e4066Sahrens static int 2873fa9e4066Sahrens zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 2874fa9e4066Sahrens { 2875fa9e4066Sahrens zfs_zlock_t *zl; 2876feb08c6bSbillm znode_t *zp = tdzp; 2877fa9e4066Sahrens uint64_t rootid = zp->z_zfsvfs->z_root; 2878fa9e4066Sahrens uint64_t *oidp = &zp->z_id; 2879fa9e4066Sahrens krwlock_t *rwlp = &szp->z_parent_lock; 2880fa9e4066Sahrens krw_t rw = RW_WRITER; 2881fa9e4066Sahrens 2882fa9e4066Sahrens /* 2883fa9e4066Sahrens * First pass write-locks szp and compares to zp->z_id. 2884fa9e4066Sahrens * Later passes read-lock zp and compare to zp->z_parent. 2885fa9e4066Sahrens */ 2886fa9e4066Sahrens do { 2887ff008e00Smaybee if (!rw_tryenter(rwlp, rw)) { 2888ff008e00Smaybee /* 2889ff008e00Smaybee * Another thread is renaming in this path. 2890ff008e00Smaybee * Note that if we are a WRITER, we don't have any 2891ff008e00Smaybee * parent_locks held yet. 2892ff008e00Smaybee */ 2893ff008e00Smaybee if (rw == RW_READER && zp->z_id > szp->z_id) { 2894ff008e00Smaybee /* 2895ff008e00Smaybee * Drop our locks and restart 2896ff008e00Smaybee */ 2897ff008e00Smaybee zfs_rename_unlock(&zl); 2898ff008e00Smaybee *zlpp = NULL; 2899ff008e00Smaybee zp = tdzp; 2900ff008e00Smaybee oidp = &zp->z_id; 2901ff008e00Smaybee rwlp = &szp->z_parent_lock; 2902ff008e00Smaybee rw = RW_WRITER; 2903ff008e00Smaybee continue; 2904ff008e00Smaybee } else { 2905ff008e00Smaybee /* 2906ff008e00Smaybee * Wait for other thread to drop its locks 2907ff008e00Smaybee */ 2908ff008e00Smaybee rw_enter(rwlp, rw); 2909ff008e00Smaybee } 2910ff008e00Smaybee } 2911ff008e00Smaybee 2912fa9e4066Sahrens zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 2913fa9e4066Sahrens zl->zl_rwlock = rwlp; 2914fa9e4066Sahrens zl->zl_znode = NULL; 2915fa9e4066Sahrens zl->zl_next = *zlpp; 2916fa9e4066Sahrens *zlpp = zl; 2917fa9e4066Sahrens 2918fa9e4066Sahrens if (*oidp == szp->z_id) /* We're a descendant of szp */ 2919fa9e4066Sahrens return (EINVAL); 2920fa9e4066Sahrens 2921fa9e4066Sahrens if (*oidp == rootid) /* We've hit the top */ 2922fa9e4066Sahrens return (0); 2923fa9e4066Sahrens 2924fa9e4066Sahrens if (rw == RW_READER) { /* i.e. not the first pass */ 2925fa9e4066Sahrens int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp); 2926fa9e4066Sahrens if (error) 2927fa9e4066Sahrens return (error); 2928fa9e4066Sahrens zl->zl_znode = zp; 2929fa9e4066Sahrens } 2930fa9e4066Sahrens oidp = &zp->z_phys->zp_parent; 2931fa9e4066Sahrens rwlp = &zp->z_parent_lock; 2932fa9e4066Sahrens rw = RW_READER; 2933fa9e4066Sahrens 2934fa9e4066Sahrens } while (zp->z_id != sdzp->z_id); 2935fa9e4066Sahrens 2936fa9e4066Sahrens return (0); 2937fa9e4066Sahrens } 2938fa9e4066Sahrens 2939fa9e4066Sahrens /* 2940fa9e4066Sahrens * Move an entry from the provided source directory to the target 2941fa9e4066Sahrens * directory. Change the entry name as indicated. 2942fa9e4066Sahrens * 2943fa9e4066Sahrens * IN: sdvp - Source directory containing the "old entry". 2944fa9e4066Sahrens * snm - Old entry name. 2945fa9e4066Sahrens * tdvp - Target directory to contain the "new entry". 2946fa9e4066Sahrens * tnm - New entry name. 2947fa9e4066Sahrens * cr - credentials of caller. 2948da6c28aaSamw * ct - caller context 2949da6c28aaSamw * flags - case flags 2950fa9e4066Sahrens * 2951fa9e4066Sahrens * RETURN: 0 if success 2952fa9e4066Sahrens * error code if failure 2953fa9e4066Sahrens * 2954fa9e4066Sahrens * Timestamps: 2955fa9e4066Sahrens * sdvp,tdvp - ctime|mtime updated 2956fa9e4066Sahrens */ 2957da6c28aaSamw /*ARGSUSED*/ 2958fa9e4066Sahrens static int 2959da6c28aaSamw zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr, 2960da6c28aaSamw caller_context_t *ct, int flags) 2961fa9e4066Sahrens { 2962fa9e4066Sahrens znode_t *tdzp, *szp, *tzp; 2963fa9e4066Sahrens znode_t *sdzp = VTOZ(sdvp); 2964fa9e4066Sahrens zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 2965f18faf3fSek zilog_t *zilog; 2966fa9e4066Sahrens vnode_t *realvp; 2967fa9e4066Sahrens zfs_dirlock_t *sdl, *tdl; 2968fa9e4066Sahrens dmu_tx_t *tx; 2969fa9e4066Sahrens zfs_zlock_t *zl; 2970da6c28aaSamw int cmp, serr, terr; 2971da6c28aaSamw int error = 0; 2972da6c28aaSamw int zflg = 0; 2973fa9e4066Sahrens 29743cb34c60Sahrens ZFS_ENTER(zfsvfs); 29753cb34c60Sahrens ZFS_VERIFY_ZP(sdzp); 2976f18faf3fSek zilog = zfsvfs->z_log; 2977fa9e4066Sahrens 2978fa9e4066Sahrens /* 2979fa9e4066Sahrens * Make sure we have the real vp for the target directory. 2980fa9e4066Sahrens */ 2981da6c28aaSamw if (VOP_REALVP(tdvp, &realvp, ct) == 0) 2982fa9e4066Sahrens tdvp = realvp; 2983fa9e4066Sahrens 2984fa9e4066Sahrens if (tdvp->v_vfsp != sdvp->v_vfsp) { 2985fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2986fa9e4066Sahrens return (EXDEV); 2987fa9e4066Sahrens } 2988fa9e4066Sahrens 2989fa9e4066Sahrens tdzp = VTOZ(tdvp); 29903cb34c60Sahrens ZFS_VERIFY_ZP(tdzp); 2991de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(tnm, 2992da6c28aaSamw strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 2993da6c28aaSamw ZFS_EXIT(zfsvfs); 2994da6c28aaSamw return (EILSEQ); 2995da6c28aaSamw } 2996da6c28aaSamw 2997da6c28aaSamw if (flags & FIGNORECASE) 2998da6c28aaSamw zflg |= ZCILOOK; 2999da6c28aaSamw 3000fa9e4066Sahrens top: 3001fa9e4066Sahrens szp = NULL; 3002fa9e4066Sahrens tzp = NULL; 3003fa9e4066Sahrens zl = NULL; 3004fa9e4066Sahrens 3005fa9e4066Sahrens /* 3006fa9e4066Sahrens * This is to prevent the creation of links into attribute space 3007fa9e4066Sahrens * by renaming a linked file into/outof an attribute directory. 3008fa9e4066Sahrens * See the comment in zfs_link() for why this is considered bad. 3009fa9e4066Sahrens */ 3010fa9e4066Sahrens if ((tdzp->z_phys->zp_flags & ZFS_XATTR) != 3011fa9e4066Sahrens (sdzp->z_phys->zp_flags & ZFS_XATTR)) { 3012fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3013fa9e4066Sahrens return (EINVAL); 3014fa9e4066Sahrens } 3015fa9e4066Sahrens 3016fa9e4066Sahrens /* 3017fa9e4066Sahrens * Lock source and target directory entries. To prevent deadlock, 3018fa9e4066Sahrens * a lock ordering must be defined. We lock the directory with 3019fa9e4066Sahrens * the smallest object id first, or if it's a tie, the one with 3020fa9e4066Sahrens * the lexically first name. 3021fa9e4066Sahrens */ 3022fa9e4066Sahrens if (sdzp->z_id < tdzp->z_id) { 3023fa9e4066Sahrens cmp = -1; 3024fa9e4066Sahrens } else if (sdzp->z_id > tdzp->z_id) { 3025fa9e4066Sahrens cmp = 1; 3026fa9e4066Sahrens } else { 3027da6c28aaSamw /* 3028da6c28aaSamw * First compare the two name arguments without 3029da6c28aaSamw * considering any case folding. 3030da6c28aaSamw */ 3031da6c28aaSamw int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER); 3032da6c28aaSamw 3033da6c28aaSamw cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error); 3034de8267e0Stimh ASSERT(error == 0 || !zfsvfs->z_utf8); 3035fa9e4066Sahrens if (cmp == 0) { 3036fa9e4066Sahrens /* 3037fa9e4066Sahrens * POSIX: "If the old argument and the new argument 3038fa9e4066Sahrens * both refer to links to the same existing file, 3039fa9e4066Sahrens * the rename() function shall return successfully 3040fa9e4066Sahrens * and perform no other action." 3041fa9e4066Sahrens */ 3042fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3043fa9e4066Sahrens return (0); 3044fa9e4066Sahrens } 3045da6c28aaSamw /* 3046da6c28aaSamw * If the file system is case-folding, then we may 3047da6c28aaSamw * have some more checking to do. A case-folding file 3048da6c28aaSamw * system is either supporting mixed case sensitivity 3049da6c28aaSamw * access or is completely case-insensitive. Note 3050da6c28aaSamw * that the file system is always case preserving. 3051da6c28aaSamw * 3052da6c28aaSamw * In mixed sensitivity mode case sensitive behavior 3053da6c28aaSamw * is the default. FIGNORECASE must be used to 3054da6c28aaSamw * explicitly request case insensitive behavior. 3055da6c28aaSamw * 3056da6c28aaSamw * If the source and target names provided differ only 3057da6c28aaSamw * by case (e.g., a request to rename 'tim' to 'Tim'), 3058da6c28aaSamw * we will treat this as a special case in the 3059da6c28aaSamw * case-insensitive mode: as long as the source name 3060da6c28aaSamw * is an exact match, we will allow this to proceed as 3061da6c28aaSamw * a name-change request. 3062da6c28aaSamw */ 3063de8267e0Stimh if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 3064de8267e0Stimh (zfsvfs->z_case == ZFS_CASE_MIXED && 3065de8267e0Stimh flags & FIGNORECASE)) && 3066da6c28aaSamw u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST, 3067da6c28aaSamw &error) == 0) { 3068da6c28aaSamw /* 3069da6c28aaSamw * case preserving rename request, require exact 3070da6c28aaSamw * name matches 3071da6c28aaSamw */ 3072da6c28aaSamw zflg |= ZCIEXACT; 3073da6c28aaSamw zflg &= ~ZCILOOK; 3074da6c28aaSamw } 3075fa9e4066Sahrens } 3076da6c28aaSamw 3077fa9e4066Sahrens if (cmp < 0) { 3078da6c28aaSamw serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, 3079da6c28aaSamw ZEXISTS | zflg, NULL, NULL); 3080da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3081da6c28aaSamw tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL); 3082fa9e4066Sahrens } else { 3083da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3084da6c28aaSamw tdzp, tnm, &tzp, zflg, NULL, NULL); 3085da6c28aaSamw serr = zfs_dirent_lock(&sdl, 3086da6c28aaSamw sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg, 3087da6c28aaSamw NULL, NULL); 3088fa9e4066Sahrens } 3089fa9e4066Sahrens 3090fa9e4066Sahrens if (serr) { 3091fa9e4066Sahrens /* 3092fa9e4066Sahrens * Source entry invalid or not there. 3093fa9e4066Sahrens */ 3094fa9e4066Sahrens if (!terr) { 3095fa9e4066Sahrens zfs_dirent_unlock(tdl); 3096fa9e4066Sahrens if (tzp) 3097fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3098fa9e4066Sahrens } 3099fa9e4066Sahrens if (strcmp(snm, "..") == 0) 3100fa9e4066Sahrens serr = EINVAL; 3101fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3102fa9e4066Sahrens return (serr); 3103fa9e4066Sahrens } 3104fa9e4066Sahrens if (terr) { 3105fa9e4066Sahrens zfs_dirent_unlock(sdl); 3106fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3107fa9e4066Sahrens if (strcmp(tnm, "..") == 0) 3108fa9e4066Sahrens terr = EINVAL; 3109fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3110fa9e4066Sahrens return (terr); 3111fa9e4066Sahrens } 3112fa9e4066Sahrens 3113fa9e4066Sahrens /* 3114fa9e4066Sahrens * Must have write access at the source to remove the old entry 3115fa9e4066Sahrens * and write access at the target to create the new entry. 3116fa9e4066Sahrens * Note that if target and source are the same, this can be 3117fa9e4066Sahrens * done in a single check. 3118fa9e4066Sahrens */ 3119fa9e4066Sahrens 3120fa9e4066Sahrens if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 3121fa9e4066Sahrens goto out; 3122fa9e4066Sahrens 3123fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3124fa9e4066Sahrens /* 3125fa9e4066Sahrens * Check to make sure rename is valid. 3126fa9e4066Sahrens * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 3127fa9e4066Sahrens */ 3128fa9e4066Sahrens if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 3129fa9e4066Sahrens goto out; 3130fa9e4066Sahrens } 3131fa9e4066Sahrens 3132fa9e4066Sahrens /* 3133fa9e4066Sahrens * Does target exist? 3134fa9e4066Sahrens */ 3135fa9e4066Sahrens if (tzp) { 3136fa9e4066Sahrens /* 3137fa9e4066Sahrens * Source and target must be the same type. 3138fa9e4066Sahrens */ 3139fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3140fa9e4066Sahrens if (ZTOV(tzp)->v_type != VDIR) { 3141fa9e4066Sahrens error = ENOTDIR; 3142fa9e4066Sahrens goto out; 3143fa9e4066Sahrens } 3144fa9e4066Sahrens } else { 3145fa9e4066Sahrens if (ZTOV(tzp)->v_type == VDIR) { 3146fa9e4066Sahrens error = EISDIR; 3147fa9e4066Sahrens goto out; 3148fa9e4066Sahrens } 3149fa9e4066Sahrens } 3150fa9e4066Sahrens /* 3151fa9e4066Sahrens * POSIX dictates that when the source and target 3152fa9e4066Sahrens * entries refer to the same file object, rename 3153fa9e4066Sahrens * must do nothing and exit without error. 3154fa9e4066Sahrens */ 3155fa9e4066Sahrens if (szp->z_id == tzp->z_id) { 3156fa9e4066Sahrens error = 0; 3157fa9e4066Sahrens goto out; 3158fa9e4066Sahrens } 3159fa9e4066Sahrens } 3160fa9e4066Sahrens 3161da6c28aaSamw vnevent_rename_src(ZTOV(szp), sdvp, snm, ct); 3162fa9e4066Sahrens if (tzp) 3163da6c28aaSamw vnevent_rename_dest(ZTOV(tzp), tdvp, tnm, ct); 3164df2381bfSpraks 3165df2381bfSpraks /* 3166df2381bfSpraks * notify the target directory if it is not the same 3167df2381bfSpraks * as source directory. 3168df2381bfSpraks */ 3169df2381bfSpraks if (tdvp != sdvp) { 3170da6c28aaSamw vnevent_rename_dest_dir(tdvp, ct); 3171df2381bfSpraks } 3172fa9e4066Sahrens 3173fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3174fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */ 3175fa9e4066Sahrens dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */ 3176ea8dc4b6Seschrock dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); 3177ea8dc4b6Seschrock dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); 3178ea8dc4b6Seschrock if (sdzp != tdzp) 3179fa9e4066Sahrens dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */ 3180ea8dc4b6Seschrock if (tzp) 3181ea8dc4b6Seschrock dmu_tx_hold_bonus(tx, tzp->z_id); /* parent changes */ 3182893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 3183*1209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 3184fa9e4066Sahrens if (error) { 3185fa9e4066Sahrens if (zl != NULL) 3186fa9e4066Sahrens zfs_rename_unlock(&zl); 3187fa9e4066Sahrens zfs_dirent_unlock(sdl); 3188fa9e4066Sahrens zfs_dirent_unlock(tdl); 3189fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3190fa9e4066Sahrens if (tzp) 3191fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3192*1209a471SNeil Perrin if (error == ERESTART) { 31938a2f1b91Sahrens dmu_tx_wait(tx); 31948a2f1b91Sahrens dmu_tx_abort(tx); 3195fa9e4066Sahrens goto top; 3196fa9e4066Sahrens } 31978a2f1b91Sahrens dmu_tx_abort(tx); 3198fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3199fa9e4066Sahrens return (error); 3200fa9e4066Sahrens } 3201fa9e4066Sahrens 3202fa9e4066Sahrens if (tzp) /* Attempt to remove the existing target */ 3203da6c28aaSamw error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL); 3204fa9e4066Sahrens 3205fa9e4066Sahrens if (error == 0) { 3206fa9e4066Sahrens error = zfs_link_create(tdl, szp, tx, ZRENAMING); 3207fa9e4066Sahrens if (error == 0) { 3208da6c28aaSamw szp->z_phys->zp_flags |= ZFS_AV_MODIFIED; 3209da6c28aaSamw 3210fa9e4066Sahrens error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 3211fa9e4066Sahrens ASSERT(error == 0); 3212da6c28aaSamw 3213da6c28aaSamw zfs_log_rename(zilog, tx, 3214da6c28aaSamw TX_RENAME | (flags & FIGNORECASE ? TX_CI : 0), 3215da6c28aaSamw sdzp, sdl->dl_name, tdzp, tdl->dl_name, szp); 321651ece835Seschrock 321751ece835Seschrock /* Update path information for the target vnode */ 321851ece835Seschrock vn_renamepath(tdvp, ZTOV(szp), tnm, strlen(tnm)); 3219fa9e4066Sahrens } 3220fa9e4066Sahrens } 3221fa9e4066Sahrens 3222fa9e4066Sahrens dmu_tx_commit(tx); 3223fa9e4066Sahrens out: 3224fa9e4066Sahrens if (zl != NULL) 3225fa9e4066Sahrens zfs_rename_unlock(&zl); 3226fa9e4066Sahrens 3227fa9e4066Sahrens zfs_dirent_unlock(sdl); 3228fa9e4066Sahrens zfs_dirent_unlock(tdl); 3229fa9e4066Sahrens 3230fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3231fa9e4066Sahrens if (tzp) 3232fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3233fa9e4066Sahrens 3234fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3235fa9e4066Sahrens return (error); 3236fa9e4066Sahrens } 3237fa9e4066Sahrens 3238fa9e4066Sahrens /* 3239fa9e4066Sahrens * Insert the indicated symbolic reference entry into the directory. 3240fa9e4066Sahrens * 3241fa9e4066Sahrens * IN: dvp - Directory to contain new symbolic link. 3242fa9e4066Sahrens * link - Name for new symlink entry. 3243fa9e4066Sahrens * vap - Attributes of new entry. 3244fa9e4066Sahrens * target - Target path of new symlink. 3245fa9e4066Sahrens * cr - credentials of caller. 3246da6c28aaSamw * ct - caller context 3247da6c28aaSamw * flags - case flags 3248fa9e4066Sahrens * 3249fa9e4066Sahrens * RETURN: 0 if success 3250fa9e4066Sahrens * error code if failure 3251fa9e4066Sahrens * 3252fa9e4066Sahrens * Timestamps: 3253fa9e4066Sahrens * dvp - ctime|mtime updated 3254fa9e4066Sahrens */ 3255da6c28aaSamw /*ARGSUSED*/ 3256fa9e4066Sahrens static int 3257da6c28aaSamw zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr, 3258da6c28aaSamw caller_context_t *ct, int flags) 3259fa9e4066Sahrens { 3260fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 3261fa9e4066Sahrens zfs_dirlock_t *dl; 3262fa9e4066Sahrens dmu_tx_t *tx; 3263fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3264f18faf3fSek zilog_t *zilog; 3265fa9e4066Sahrens int len = strlen(link); 3266fa9e4066Sahrens int error; 3267da6c28aaSamw int zflg = ZNEW; 3268da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 3269fa9e4066Sahrens 3270fa9e4066Sahrens ASSERT(vap->va_type == VLNK); 3271fa9e4066Sahrens 32723cb34c60Sahrens ZFS_ENTER(zfsvfs); 32733cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3274f18faf3fSek zilog = zfsvfs->z_log; 3275da6c28aaSamw 3276de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 3277da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3278da6c28aaSamw ZFS_EXIT(zfsvfs); 3279da6c28aaSamw return (EILSEQ); 3280da6c28aaSamw } 3281da6c28aaSamw if (flags & FIGNORECASE) 3282da6c28aaSamw zflg |= ZCILOOK; 3283fa9e4066Sahrens top: 3284da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3285fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3286fa9e4066Sahrens return (error); 3287fa9e4066Sahrens } 3288fa9e4066Sahrens 3289fa9e4066Sahrens if (len > MAXPATHLEN) { 3290fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3291fa9e4066Sahrens return (ENAMETOOLONG); 3292fa9e4066Sahrens } 3293fa9e4066Sahrens 3294fa9e4066Sahrens /* 3295fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3296fa9e4066Sahrens */ 3297da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL); 3298da6c28aaSamw if (error) { 3299fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3300fa9e4066Sahrens return (error); 3301fa9e4066Sahrens } 3302fa9e4066Sahrens 3303fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3304fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 3305fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 3306ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 3307fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 3308fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE); 33094c841f60Smarks if (IS_EPHEMERAL(crgetuid(cr)) || IS_EPHEMERAL(crgetgid(cr))) { 33104c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 33114c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 33124c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 33134c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 33144c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); 33154c841f60Smarks } else { 33164c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 33174c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 33184c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 33194c841f60Smarks } 3320da6c28aaSamw } 3321*1209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 3322fa9e4066Sahrens if (error) { 3323fa9e4066Sahrens zfs_dirent_unlock(dl); 3324*1209a471SNeil Perrin if (error == ERESTART) { 33258a2f1b91Sahrens dmu_tx_wait(tx); 33268a2f1b91Sahrens dmu_tx_abort(tx); 3327fa9e4066Sahrens goto top; 3328fa9e4066Sahrens } 33298a2f1b91Sahrens dmu_tx_abort(tx); 3330fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3331fa9e4066Sahrens return (error); 3332fa9e4066Sahrens } 3333fa9e4066Sahrens 3334fa9e4066Sahrens dmu_buf_will_dirty(dzp->z_dbuf, tx); 3335fa9e4066Sahrens 3336fa9e4066Sahrens /* 3337fa9e4066Sahrens * Create a new object for the symlink. 3338fa9e4066Sahrens * Put the link content into bonus buffer if it will fit; 3339fa9e4066Sahrens * otherwise, store it just like any other file data. 3340fa9e4066Sahrens */ 3341fa9e4066Sahrens if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) { 33424ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, len, NULL, &fuidp); 3343fa9e4066Sahrens if (len != 0) 3344fa9e4066Sahrens bcopy(link, zp->z_phys + 1, len); 3345fa9e4066Sahrens } else { 3346fa9e4066Sahrens dmu_buf_t *dbp; 3347104e2ed7Sperrin 33484ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, NULL, &fuidp); 3349104e2ed7Sperrin /* 3350104e2ed7Sperrin * Nothing can access the znode yet so no locking needed 3351104e2ed7Sperrin * for growing the znode's blocksize. 3352104e2ed7Sperrin */ 3353104e2ed7Sperrin zfs_grow_blocksize(zp, len, tx); 3354fa9e4066Sahrens 33554ccbb6e7Sahrens VERIFY(0 == dmu_buf_hold(zfsvfs->z_os, 33564ccbb6e7Sahrens zp->z_id, 0, FTAG, &dbp)); 3357fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 3358fa9e4066Sahrens 3359fa9e4066Sahrens ASSERT3U(len, <=, dbp->db_size); 3360fa9e4066Sahrens bcopy(link, dbp->db_data, len); 3361ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3362fa9e4066Sahrens } 3363fa9e4066Sahrens zp->z_phys->zp_size = len; 3364fa9e4066Sahrens 3365fa9e4066Sahrens /* 3366fa9e4066Sahrens * Insert the new object into the directory. 3367fa9e4066Sahrens */ 3368fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 3369fa9e4066Sahrens out: 3370da6c28aaSamw if (error == 0) { 3371da6c28aaSamw uint64_t txtype = TX_SYMLINK; 3372da6c28aaSamw if (flags & FIGNORECASE) 3373da6c28aaSamw txtype |= TX_CI; 3374da6c28aaSamw zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link); 3375da6c28aaSamw } 3376da6c28aaSamw if (fuidp) 3377da6c28aaSamw zfs_fuid_info_free(fuidp); 3378fa9e4066Sahrens 3379fa9e4066Sahrens dmu_tx_commit(tx); 3380fa9e4066Sahrens 3381fa9e4066Sahrens zfs_dirent_unlock(dl); 3382fa9e4066Sahrens 3383fa9e4066Sahrens VN_RELE(ZTOV(zp)); 3384fa9e4066Sahrens 3385fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3386fa9e4066Sahrens return (error); 3387fa9e4066Sahrens } 3388fa9e4066Sahrens 3389fa9e4066Sahrens /* 3390fa9e4066Sahrens * Return, in the buffer contained in the provided uio structure, 3391fa9e4066Sahrens * the symbolic path referred to by vp. 3392fa9e4066Sahrens * 3393fa9e4066Sahrens * IN: vp - vnode of symbolic link. 3394fa9e4066Sahrens * uoip - structure to contain the link path. 3395fa9e4066Sahrens * cr - credentials of caller. 3396da6c28aaSamw * ct - caller context 3397fa9e4066Sahrens * 3398fa9e4066Sahrens * OUT: uio - structure to contain the link path. 3399fa9e4066Sahrens * 3400fa9e4066Sahrens * RETURN: 0 if success 3401fa9e4066Sahrens * error code if failure 3402fa9e4066Sahrens * 3403fa9e4066Sahrens * Timestamps: 3404fa9e4066Sahrens * vp - atime updated 3405fa9e4066Sahrens */ 3406fa9e4066Sahrens /* ARGSUSED */ 3407fa9e4066Sahrens static int 3408da6c28aaSamw zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct) 3409fa9e4066Sahrens { 3410fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3411fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3412fa9e4066Sahrens size_t bufsz; 3413fa9e4066Sahrens int error; 3414fa9e4066Sahrens 34153cb34c60Sahrens ZFS_ENTER(zfsvfs); 34163cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3417fa9e4066Sahrens 3418fa9e4066Sahrens bufsz = (size_t)zp->z_phys->zp_size; 3419fa9e4066Sahrens if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) { 3420fa9e4066Sahrens error = uiomove(zp->z_phys + 1, 3421fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3422fa9e4066Sahrens } else { 3423ea8dc4b6Seschrock dmu_buf_t *dbp; 3424ea8dc4b6Seschrock error = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0, FTAG, &dbp); 3425ea8dc4b6Seschrock if (error) { 3426fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3427fa9e4066Sahrens return (error); 3428fa9e4066Sahrens } 3429fa9e4066Sahrens error = uiomove(dbp->db_data, 3430fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3431ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3432fa9e4066Sahrens } 3433fa9e4066Sahrens 3434fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 3435fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3436fa9e4066Sahrens return (error); 3437fa9e4066Sahrens } 3438fa9e4066Sahrens 3439fa9e4066Sahrens /* 3440fa9e4066Sahrens * Insert a new entry into directory tdvp referencing svp. 3441fa9e4066Sahrens * 3442fa9e4066Sahrens * IN: tdvp - Directory to contain new entry. 3443fa9e4066Sahrens * svp - vnode of new entry. 3444fa9e4066Sahrens * name - name of new entry. 3445fa9e4066Sahrens * cr - credentials of caller. 3446da6c28aaSamw * ct - caller context 3447fa9e4066Sahrens * 3448fa9e4066Sahrens * RETURN: 0 if success 3449fa9e4066Sahrens * error code if failure 3450fa9e4066Sahrens * 3451fa9e4066Sahrens * Timestamps: 3452fa9e4066Sahrens * tdvp - ctime|mtime updated 3453fa9e4066Sahrens * svp - ctime updated 3454fa9e4066Sahrens */ 3455fa9e4066Sahrens /* ARGSUSED */ 3456fa9e4066Sahrens static int 3457da6c28aaSamw zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr, 3458da6c28aaSamw caller_context_t *ct, int flags) 3459fa9e4066Sahrens { 3460fa9e4066Sahrens znode_t *dzp = VTOZ(tdvp); 3461fa9e4066Sahrens znode_t *tzp, *szp; 3462fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3463f18faf3fSek zilog_t *zilog; 3464fa9e4066Sahrens zfs_dirlock_t *dl; 3465fa9e4066Sahrens dmu_tx_t *tx; 3466fa9e4066Sahrens vnode_t *realvp; 3467fa9e4066Sahrens int error; 3468da6c28aaSamw int zf = ZNEW; 3469da6c28aaSamw uid_t owner; 3470fa9e4066Sahrens 3471fa9e4066Sahrens ASSERT(tdvp->v_type == VDIR); 3472fa9e4066Sahrens 34733cb34c60Sahrens ZFS_ENTER(zfsvfs); 34743cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3475f18faf3fSek zilog = zfsvfs->z_log; 3476fa9e4066Sahrens 3477da6c28aaSamw if (VOP_REALVP(svp, &realvp, ct) == 0) 3478fa9e4066Sahrens svp = realvp; 3479fa9e4066Sahrens 3480fa9e4066Sahrens if (svp->v_vfsp != tdvp->v_vfsp) { 3481fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3482fa9e4066Sahrens return (EXDEV); 3483fa9e4066Sahrens } 34843cb34c60Sahrens szp = VTOZ(svp); 34853cb34c60Sahrens ZFS_VERIFY_ZP(szp); 3486fa9e4066Sahrens 3487de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, 3488da6c28aaSamw strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3489da6c28aaSamw ZFS_EXIT(zfsvfs); 3490da6c28aaSamw return (EILSEQ); 3491da6c28aaSamw } 3492da6c28aaSamw if (flags & FIGNORECASE) 3493da6c28aaSamw zf |= ZCILOOK; 3494da6c28aaSamw 3495fa9e4066Sahrens top: 3496fa9e4066Sahrens /* 3497fa9e4066Sahrens * We do not support links between attributes and non-attributes 3498fa9e4066Sahrens * because of the potential security risk of creating links 3499fa9e4066Sahrens * into "normal" file space in order to circumvent restrictions 3500fa9e4066Sahrens * imposed in attribute space. 3501fa9e4066Sahrens */ 3502fa9e4066Sahrens if ((szp->z_phys->zp_flags & ZFS_XATTR) != 3503fa9e4066Sahrens (dzp->z_phys->zp_flags & ZFS_XATTR)) { 3504fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3505fa9e4066Sahrens return (EINVAL); 3506fa9e4066Sahrens } 3507fa9e4066Sahrens 3508fa9e4066Sahrens /* 3509fa9e4066Sahrens * POSIX dictates that we return EPERM here. 3510fa9e4066Sahrens * Better choices include ENOTSUP or EISDIR. 3511fa9e4066Sahrens */ 3512fa9e4066Sahrens if (svp->v_type == VDIR) { 3513fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3514fa9e4066Sahrens return (EPERM); 3515fa9e4066Sahrens } 3516fa9e4066Sahrens 3517e0d35c44Smarks owner = zfs_fuid_map_id(zfsvfs, szp->z_phys->zp_uid, cr, ZFS_OWNER); 3518da6c28aaSamw if (owner != crgetuid(cr) && 3519fa9e4066Sahrens secpolicy_basic_link(cr) != 0) { 3520fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3521fa9e4066Sahrens return (EPERM); 3522fa9e4066Sahrens } 3523fa9e4066Sahrens 3524da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3525fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3526fa9e4066Sahrens return (error); 3527fa9e4066Sahrens } 3528fa9e4066Sahrens 3529fa9e4066Sahrens /* 3530fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3531fa9e4066Sahrens */ 3532da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &tzp, zf, NULL, NULL); 3533da6c28aaSamw if (error) { 3534fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3535fa9e4066Sahrens return (error); 3536fa9e4066Sahrens } 3537fa9e4066Sahrens 3538fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3539fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); 3540ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 3541*1209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 3542fa9e4066Sahrens if (error) { 3543fa9e4066Sahrens zfs_dirent_unlock(dl); 3544*1209a471SNeil Perrin if (error == ERESTART) { 35458a2f1b91Sahrens dmu_tx_wait(tx); 35468a2f1b91Sahrens dmu_tx_abort(tx); 3547fa9e4066Sahrens goto top; 3548fa9e4066Sahrens } 35498a2f1b91Sahrens dmu_tx_abort(tx); 3550fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3551fa9e4066Sahrens return (error); 3552fa9e4066Sahrens } 3553fa9e4066Sahrens 3554fa9e4066Sahrens error = zfs_link_create(dl, szp, tx, 0); 3555fa9e4066Sahrens 3556da6c28aaSamw if (error == 0) { 3557da6c28aaSamw uint64_t txtype = TX_LINK; 3558da6c28aaSamw if (flags & FIGNORECASE) 3559da6c28aaSamw txtype |= TX_CI; 3560da6c28aaSamw zfs_log_link(zilog, tx, txtype, dzp, szp, name); 3561da6c28aaSamw } 3562fa9e4066Sahrens 3563fa9e4066Sahrens dmu_tx_commit(tx); 3564fa9e4066Sahrens 3565fa9e4066Sahrens zfs_dirent_unlock(dl); 3566fa9e4066Sahrens 3567df2381bfSpraks if (error == 0) { 3568da6c28aaSamw vnevent_link(svp, ct); 3569df2381bfSpraks } 3570df2381bfSpraks 3571fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3572fa9e4066Sahrens return (error); 3573fa9e4066Sahrens } 3574fa9e4066Sahrens 3575fa9e4066Sahrens /* 3576fa9e4066Sahrens * zfs_null_putapage() is used when the file system has been force 3577fa9e4066Sahrens * unmounted. It just drops the pages. 3578fa9e4066Sahrens */ 3579fa9e4066Sahrens /* ARGSUSED */ 3580fa9e4066Sahrens static int 3581fa9e4066Sahrens zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3582fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3583fa9e4066Sahrens { 3584fa9e4066Sahrens pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 3585fa9e4066Sahrens return (0); 3586fa9e4066Sahrens } 3587fa9e4066Sahrens 358844eda4d7Smaybee /* 358944eda4d7Smaybee * Push a page out to disk, klustering if possible. 359044eda4d7Smaybee * 359144eda4d7Smaybee * IN: vp - file to push page to. 359244eda4d7Smaybee * pp - page to push. 359344eda4d7Smaybee * flags - additional flags. 359444eda4d7Smaybee * cr - credentials of caller. 359544eda4d7Smaybee * 359644eda4d7Smaybee * OUT: offp - start of range pushed. 359744eda4d7Smaybee * lenp - len of range pushed. 359844eda4d7Smaybee * 359944eda4d7Smaybee * RETURN: 0 if success 360044eda4d7Smaybee * error code if failure 360144eda4d7Smaybee * 360244eda4d7Smaybee * NOTE: callers must have locked the page to be pushed. On 360344eda4d7Smaybee * exit, the page (and all other pages in the kluster) must be 360444eda4d7Smaybee * unlocked. 360544eda4d7Smaybee */ 3606fa9e4066Sahrens /* ARGSUSED */ 3607fa9e4066Sahrens static int 3608fa9e4066Sahrens zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3609fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3610fa9e4066Sahrens { 3611fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3612fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3613fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 3614fa9e4066Sahrens dmu_tx_t *tx; 3615104e2ed7Sperrin rl_t *rl; 361644eda4d7Smaybee u_offset_t off, koff; 361744eda4d7Smaybee size_t len, klen; 3618f4d2e9e6Smaybee uint64_t filesz; 3619fa9e4066Sahrens int err; 3620fa9e4066Sahrens 3621f4d2e9e6Smaybee filesz = zp->z_phys->zp_size; 3622fa9e4066Sahrens off = pp->p_offset; 362344eda4d7Smaybee len = PAGESIZE; 362444eda4d7Smaybee /* 362544eda4d7Smaybee * If our blocksize is bigger than the page size, try to kluster 3626*1209a471SNeil Perrin * multiple pages so that we write a full block (thus avoiding 362744eda4d7Smaybee * a read-modify-write). 362844eda4d7Smaybee */ 3629f4d2e9e6Smaybee if (off < filesz && zp->z_blksz > PAGESIZE) { 363044eda4d7Smaybee if (!ISP2(zp->z_blksz)) { 363144eda4d7Smaybee /* Only one block in the file. */ 363244eda4d7Smaybee klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 363344eda4d7Smaybee koff = 0; 363444eda4d7Smaybee } else { 363544eda4d7Smaybee klen = zp->z_blksz; 363644eda4d7Smaybee koff = P2ALIGN(off, (u_offset_t)klen); 363744eda4d7Smaybee } 363844eda4d7Smaybee ASSERT(koff <= filesz); 363944eda4d7Smaybee if (koff + klen > filesz) 364044eda4d7Smaybee klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE); 364144eda4d7Smaybee pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); 364244eda4d7Smaybee } 364344eda4d7Smaybee ASSERT3U(btop(len), ==, btopr(len)); 364444eda4d7Smaybee top: 364544eda4d7Smaybee rl = zfs_range_lock(zp, off, len, RL_WRITER); 3646dd6ef538Smaybee /* 3647dd6ef538Smaybee * Can't push pages past end-of-file. 3648dd6ef538Smaybee */ 3649f4d2e9e6Smaybee filesz = zp->z_phys->zp_size; 3650f4d2e9e6Smaybee if (off >= filesz) { 3651f4d2e9e6Smaybee /* ignore all pages */ 365244eda4d7Smaybee err = 0; 365344eda4d7Smaybee goto out; 3654f4d2e9e6Smaybee } else if (off + len > filesz) { 3655f4d2e9e6Smaybee int npages = btopr(filesz - off); 365644eda4d7Smaybee page_t *trunc; 365744eda4d7Smaybee 365844eda4d7Smaybee page_list_break(&pp, &trunc, npages); 3659f4d2e9e6Smaybee /* ignore pages past end of file */ 366044eda4d7Smaybee if (trunc) 3661f4d2e9e6Smaybee pvn_write_done(trunc, flags); 3662f4d2e9e6Smaybee len = filesz - off; 3663dd6ef538Smaybee } 3664fa9e4066Sahrens 3665fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3666fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, off, len); 3667fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3668*1209a471SNeil Perrin err = dmu_tx_assign(tx, TXG_NOWAIT); 3669fa9e4066Sahrens if (err != 0) { 3670*1209a471SNeil Perrin if (err == ERESTART) { 367144eda4d7Smaybee zfs_range_unlock(rl); 36728a2f1b91Sahrens dmu_tx_wait(tx); 36738a2f1b91Sahrens dmu_tx_abort(tx); 367444eda4d7Smaybee err = 0; 3675fa9e4066Sahrens goto top; 3676fa9e4066Sahrens } 36778a2f1b91Sahrens dmu_tx_abort(tx); 3678fa9e4066Sahrens goto out; 3679fa9e4066Sahrens } 3680fa9e4066Sahrens 368144eda4d7Smaybee if (zp->z_blksz <= PAGESIZE) { 36820fab61baSJonathan W Adams caddr_t va = zfs_map_page(pp, S_READ); 368344eda4d7Smaybee ASSERT3U(len, <=, PAGESIZE); 368444eda4d7Smaybee dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 36850fab61baSJonathan W Adams zfs_unmap_page(pp, va); 368644eda4d7Smaybee } else { 368744eda4d7Smaybee err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 368844eda4d7Smaybee } 3689fa9e4066Sahrens 369044eda4d7Smaybee if (err == 0) { 369144eda4d7Smaybee zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 3692feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, off, len, 0); 369344eda4d7Smaybee dmu_tx_commit(tx); 369444eda4d7Smaybee } 3695fa9e4066Sahrens 369644eda4d7Smaybee out: 3697c5c6ffa0Smaybee zfs_range_unlock(rl); 3698f4d2e9e6Smaybee pvn_write_done(pp, (err ? B_ERROR : 0) | flags); 3699fa9e4066Sahrens if (offp) 3700fa9e4066Sahrens *offp = off; 3701fa9e4066Sahrens if (lenp) 3702fa9e4066Sahrens *lenp = len; 3703fa9e4066Sahrens 3704fa9e4066Sahrens return (err); 3705fa9e4066Sahrens } 3706fa9e4066Sahrens 3707fa9e4066Sahrens /* 3708fa9e4066Sahrens * Copy the portion of the file indicated from pages into the file. 3709fa9e4066Sahrens * The pages are stored in a page list attached to the files vnode. 3710fa9e4066Sahrens * 3711fa9e4066Sahrens * IN: vp - vnode of file to push page data to. 3712fa9e4066Sahrens * off - position in file to put data. 3713fa9e4066Sahrens * len - amount of data to write. 3714fa9e4066Sahrens * flags - flags to control the operation. 3715fa9e4066Sahrens * cr - credentials of caller. 3716da6c28aaSamw * ct - caller context. 3717fa9e4066Sahrens * 3718fa9e4066Sahrens * RETURN: 0 if success 3719fa9e4066Sahrens * error code if failure 3720fa9e4066Sahrens * 3721fa9e4066Sahrens * Timestamps: 3722fa9e4066Sahrens * vp - ctime|mtime updated 3723fa9e4066Sahrens */ 3724da6c28aaSamw /*ARGSUSED*/ 3725fa9e4066Sahrens static int 3726da6c28aaSamw zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr, 3727da6c28aaSamw caller_context_t *ct) 3728fa9e4066Sahrens { 3729fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3730fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3731fa9e4066Sahrens page_t *pp; 3732fa9e4066Sahrens size_t io_len; 3733fa9e4066Sahrens u_offset_t io_off; 3734104e2ed7Sperrin uint64_t filesz; 3735fa9e4066Sahrens int error = 0; 3736fa9e4066Sahrens 37373cb34c60Sahrens ZFS_ENTER(zfsvfs); 37383cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3739fa9e4066Sahrens 3740fa9e4066Sahrens if (len == 0) { 3741fa9e4066Sahrens /* 3742fa9e4066Sahrens * Search the entire vp list for pages >= off. 3743fa9e4066Sahrens */ 3744fa9e4066Sahrens error = pvn_vplist_dirty(vp, (u_offset_t)off, zfs_putapage, 3745fa9e4066Sahrens flags, cr); 3746fe9cf88cSperrin goto out; 3747fa9e4066Sahrens } 3748fa9e4066Sahrens 3749104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 3750104e2ed7Sperrin if (off > filesz) { 3751fa9e4066Sahrens /* past end of file */ 3752fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3753fa9e4066Sahrens return (0); 3754fa9e4066Sahrens } 3755fa9e4066Sahrens 3756104e2ed7Sperrin len = MIN(len, filesz - off); 3757fa9e4066Sahrens 3758fe9cf88cSperrin for (io_off = off; io_off < off + len; io_off += io_len) { 3759fa9e4066Sahrens if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 3760104e2ed7Sperrin pp = page_lookup(vp, io_off, 3761ecb72030Sperrin (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); 3762fa9e4066Sahrens } else { 3763fa9e4066Sahrens pp = page_lookup_nowait(vp, io_off, 3764ecb72030Sperrin (flags & B_FREE) ? SE_EXCL : SE_SHARED); 3765fa9e4066Sahrens } 3766fa9e4066Sahrens 3767fa9e4066Sahrens if (pp != NULL && pvn_getdirty(pp, flags)) { 3768fa9e4066Sahrens int err; 3769fa9e4066Sahrens 3770fa9e4066Sahrens /* 3771fa9e4066Sahrens * Found a dirty page to push 3772fa9e4066Sahrens */ 3773104e2ed7Sperrin err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 3774104e2ed7Sperrin if (err) 3775fa9e4066Sahrens error = err; 3776fa9e4066Sahrens } else { 3777fa9e4066Sahrens io_len = PAGESIZE; 3778fa9e4066Sahrens } 3779fa9e4066Sahrens } 3780fe9cf88cSperrin out: 3781b19a79ecSperrin if ((flags & B_ASYNC) == 0) 3782b19a79ecSperrin zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id); 3783fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3784fa9e4066Sahrens return (error); 3785fa9e4066Sahrens } 3786fa9e4066Sahrens 3787da6c28aaSamw /*ARGSUSED*/ 3788fa9e4066Sahrens void 3789da6c28aaSamw zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 3790fa9e4066Sahrens { 3791fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3792fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3793fa9e4066Sahrens int error; 3794fa9e4066Sahrens 3795f18faf3fSek rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 37964ccbb6e7Sahrens if (zp->z_dbuf == NULL) { 37974ccbb6e7Sahrens /* 3798874395d5Smaybee * The fs has been unmounted, or we did a 3799874395d5Smaybee * suspend/resume and this file no longer exists. 38004ccbb6e7Sahrens */ 3801fa9e4066Sahrens if (vn_has_cached_data(vp)) { 3802fa9e4066Sahrens (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, 3803fa9e4066Sahrens B_INVAL, cr); 3804fa9e4066Sahrens } 3805fa9e4066Sahrens 3806ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 3807fa9e4066Sahrens vp->v_count = 0; /* count arrives as 1 */ 38084ccbb6e7Sahrens mutex_exit(&zp->z_lock); 3809f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 3810874395d5Smaybee zfs_znode_free(zp); 3811fa9e4066Sahrens return; 3812fa9e4066Sahrens } 3813fa9e4066Sahrens 3814fa9e4066Sahrens /* 3815fa9e4066Sahrens * Attempt to push any data in the page cache. If this fails 3816fa9e4066Sahrens * we will get kicked out later in zfs_zinactive(). 3817fa9e4066Sahrens */ 38188afd4dd6Sperrin if (vn_has_cached_data(vp)) { 38198afd4dd6Sperrin (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, 38208afd4dd6Sperrin cr); 38218afd4dd6Sperrin } 3822fa9e4066Sahrens 3823893a6d32Sahrens if (zp->z_atime_dirty && zp->z_unlinked == 0) { 3824fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 3825fa9e4066Sahrens 3826fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3827fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 3828fa9e4066Sahrens if (error) { 3829fa9e4066Sahrens dmu_tx_abort(tx); 3830fa9e4066Sahrens } else { 3831fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 3832fa9e4066Sahrens mutex_enter(&zp->z_lock); 3833fa9e4066Sahrens zp->z_atime_dirty = 0; 3834fa9e4066Sahrens mutex_exit(&zp->z_lock); 3835fa9e4066Sahrens dmu_tx_commit(tx); 3836fa9e4066Sahrens } 3837fa9e4066Sahrens } 3838fa9e4066Sahrens 3839fa9e4066Sahrens zfs_zinactive(zp); 3840f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 3841fa9e4066Sahrens } 3842fa9e4066Sahrens 3843fa9e4066Sahrens /* 3844fa9e4066Sahrens * Bounds-check the seek operation. 3845fa9e4066Sahrens * 3846fa9e4066Sahrens * IN: vp - vnode seeking within 3847fa9e4066Sahrens * ooff - old file offset 3848fa9e4066Sahrens * noffp - pointer to new file offset 3849da6c28aaSamw * ct - caller context 3850fa9e4066Sahrens * 3851fa9e4066Sahrens * RETURN: 0 if success 3852fa9e4066Sahrens * EINVAL if new offset invalid 3853fa9e4066Sahrens */ 3854fa9e4066Sahrens /* ARGSUSED */ 3855fa9e4066Sahrens static int 3856da6c28aaSamw zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, 3857da6c28aaSamw caller_context_t *ct) 3858fa9e4066Sahrens { 3859fa9e4066Sahrens if (vp->v_type == VDIR) 3860fa9e4066Sahrens return (0); 3861fa9e4066Sahrens return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 3862fa9e4066Sahrens } 3863fa9e4066Sahrens 3864fa9e4066Sahrens /* 3865fa9e4066Sahrens * Pre-filter the generic locking function to trap attempts to place 3866fa9e4066Sahrens * a mandatory lock on a memory mapped file. 3867fa9e4066Sahrens */ 3868fa9e4066Sahrens static int 3869fa9e4066Sahrens zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 3870da6c28aaSamw flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct) 3871fa9e4066Sahrens { 3872fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3873fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3874fa9e4066Sahrens int error; 3875fa9e4066Sahrens 38763cb34c60Sahrens ZFS_ENTER(zfsvfs); 38773cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3878fa9e4066Sahrens 3879fa9e4066Sahrens /* 3880ea8dc4b6Seschrock * We are following the UFS semantics with respect to mapcnt 3881ea8dc4b6Seschrock * here: If we see that the file is mapped already, then we will 3882ea8dc4b6Seschrock * return an error, but we don't worry about races between this 3883ea8dc4b6Seschrock * function and zfs_map(). 3884fa9e4066Sahrens */ 3885ea8dc4b6Seschrock if (zp->z_mapcnt > 0 && MANDMODE((mode_t)zp->z_phys->zp_mode)) { 3886fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3887fa9e4066Sahrens return (EAGAIN); 3888fa9e4066Sahrens } 3889da6c28aaSamw error = fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct); 3890fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3891fa9e4066Sahrens return (error); 3892fa9e4066Sahrens } 3893fa9e4066Sahrens 3894fa9e4066Sahrens /* 3895fa9e4066Sahrens * If we can't find a page in the cache, we will create a new page 3896fa9e4066Sahrens * and fill it with file data. For efficiency, we may try to fill 3897104e2ed7Sperrin * multiple pages at once (klustering). 3898fa9e4066Sahrens */ 3899fa9e4066Sahrens static int 3900fa9e4066Sahrens zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 3901fa9e4066Sahrens caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 3902fa9e4066Sahrens { 3903fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3904fa9e4066Sahrens page_t *pp, *cur_pp; 3905fa9e4066Sahrens objset_t *os = zp->z_zfsvfs->z_os; 3906fa9e4066Sahrens caddr_t va; 3907fa9e4066Sahrens u_offset_t io_off, total; 3908fa9e4066Sahrens uint64_t oid = zp->z_id; 3909fa9e4066Sahrens size_t io_len; 3910104e2ed7Sperrin uint64_t filesz; 3911fa9e4066Sahrens int err; 3912fa9e4066Sahrens 3913fa9e4066Sahrens /* 3914fa9e4066Sahrens * If we are only asking for a single page don't bother klustering. 3915fa9e4066Sahrens */ 3916104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 391744eda4d7Smaybee if (off >= filesz) 391844eda4d7Smaybee return (EFAULT); 391944eda4d7Smaybee if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 3920fa9e4066Sahrens io_off = off; 3921fa9e4066Sahrens io_len = PAGESIZE; 3922fa9e4066Sahrens pp = page_create_va(vp, io_off, io_len, PG_WAIT, seg, addr); 3923fa9e4066Sahrens } else { 3924fa9e4066Sahrens /* 3925fa9e4066Sahrens * Try to fill a kluster of pages (a blocks worth). 3926fa9e4066Sahrens */ 3927fa9e4066Sahrens size_t klen; 3928fa9e4066Sahrens u_offset_t koff; 3929fa9e4066Sahrens 3930fa9e4066Sahrens if (!ISP2(zp->z_blksz)) { 3931fa9e4066Sahrens /* Only one block in the file. */ 3932fa9e4066Sahrens klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 3933fa9e4066Sahrens koff = 0; 3934fa9e4066Sahrens } else { 3935574679b5Sgw /* 3936574679b5Sgw * It would be ideal to align our offset to the 3937574679b5Sgw * blocksize but doing so has resulted in some 3938574679b5Sgw * strange application crashes. For now, we 3939574679b5Sgw * leave the offset as is and only adjust the 3940574679b5Sgw * length if we are off the end of the file. 3941574679b5Sgw */ 3942574679b5Sgw koff = off; 3943fa9e4066Sahrens klen = plsz; 3944fa9e4066Sahrens } 3945dd6ef538Smaybee ASSERT(koff <= filesz); 3946dd6ef538Smaybee if (koff + klen > filesz) 3947dd6ef538Smaybee klen = P2ROUNDUP(filesz, (uint64_t)PAGESIZE) - koff; 394844eda4d7Smaybee ASSERT3U(off, >=, koff); 394944eda4d7Smaybee ASSERT3U(off, <, koff + klen); 3950fa9e4066Sahrens pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 3951ecb72030Sperrin &io_len, koff, klen, 0); 3952fa9e4066Sahrens } 3953fa9e4066Sahrens if (pp == NULL) { 3954fa9e4066Sahrens /* 3955fa9e4066Sahrens * Some other thread entered the page before us. 3956fa9e4066Sahrens * Return to zfs_getpage to retry the lookup. 3957fa9e4066Sahrens */ 3958fa9e4066Sahrens *pl = NULL; 3959fa9e4066Sahrens return (0); 3960fa9e4066Sahrens } 3961fa9e4066Sahrens 3962fa9e4066Sahrens /* 3963fa9e4066Sahrens * Fill the pages in the kluster. 3964fa9e4066Sahrens */ 3965fa9e4066Sahrens cur_pp = pp; 3966fa9e4066Sahrens for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 396744eda4d7Smaybee ASSERT3U(io_off, ==, cur_pp->p_offset); 39680fab61baSJonathan W Adams va = zfs_map_page(cur_pp, S_WRITE); 3969ea8dc4b6Seschrock err = dmu_read(os, oid, io_off, PAGESIZE, va); 39700fab61baSJonathan W Adams zfs_unmap_page(cur_pp, va); 3971fa9e4066Sahrens if (err) { 3972fa9e4066Sahrens /* On error, toss the entire kluster */ 3973fa9e4066Sahrens pvn_read_done(pp, B_ERROR); 3974b87f3af3Sperrin /* convert checksum errors into IO errors */ 3975b87f3af3Sperrin if (err == ECKSUM) 3976b87f3af3Sperrin err = EIO; 3977fa9e4066Sahrens return (err); 3978fa9e4066Sahrens } 3979fa9e4066Sahrens cur_pp = cur_pp->p_next; 3980fa9e4066Sahrens } 3981fa9e4066Sahrens out: 3982fa9e4066Sahrens /* 3983fa9e4066Sahrens * Fill in the page list array from the kluster. If 3984fa9e4066Sahrens * there are too many pages in the kluster, return 3985fa9e4066Sahrens * as many pages as possible starting from the desired 3986fa9e4066Sahrens * offset `off'. 3987fa9e4066Sahrens * NOTE: the page list will always be null terminated. 3988fa9e4066Sahrens */ 3989fa9e4066Sahrens pvn_plist_init(pp, pl, plsz, off, io_len, rw); 3990fa9e4066Sahrens 3991fa9e4066Sahrens return (0); 3992fa9e4066Sahrens } 3993fa9e4066Sahrens 3994fa9e4066Sahrens /* 3995fa9e4066Sahrens * Return pointers to the pages for the file region [off, off + len] 3996fa9e4066Sahrens * in the pl array. If plsz is greater than len, this function may 3997fa9e4066Sahrens * also return page pointers from before or after the specified 3998fa9e4066Sahrens * region (i.e. some region [off', off' + plsz]). These additional 3999fa9e4066Sahrens * pages are only returned if they are already in the cache, or were 4000fa9e4066Sahrens * created as part of a klustered read. 4001fa9e4066Sahrens * 4002fa9e4066Sahrens * IN: vp - vnode of file to get data from. 4003fa9e4066Sahrens * off - position in file to get data from. 4004fa9e4066Sahrens * len - amount of data to retrieve. 4005fa9e4066Sahrens * plsz - length of provided page list. 4006fa9e4066Sahrens * seg - segment to obtain pages for. 4007fa9e4066Sahrens * addr - virtual address of fault. 4008fa9e4066Sahrens * rw - mode of created pages. 4009fa9e4066Sahrens * cr - credentials of caller. 4010da6c28aaSamw * ct - caller context. 4011fa9e4066Sahrens * 4012fa9e4066Sahrens * OUT: protp - protection mode of created pages. 4013fa9e4066Sahrens * pl - list of pages created. 4014fa9e4066Sahrens * 4015fa9e4066Sahrens * RETURN: 0 if success 4016fa9e4066Sahrens * error code if failure 4017fa9e4066Sahrens * 4018fa9e4066Sahrens * Timestamps: 4019fa9e4066Sahrens * vp - atime updated 4020fa9e4066Sahrens */ 4021fa9e4066Sahrens /* ARGSUSED */ 4022fa9e4066Sahrens static int 4023fa9e4066Sahrens zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 4024fa9e4066Sahrens page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 4025da6c28aaSamw enum seg_rw rw, cred_t *cr, caller_context_t *ct) 4026fa9e4066Sahrens { 4027fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4028fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4029fa9e4066Sahrens page_t *pp, **pl0 = pl; 4030fe2f476aSperrin int need_unlock = 0, err = 0; 4031fe2f476aSperrin offset_t orig_off; 4032fa9e4066Sahrens 40333cb34c60Sahrens ZFS_ENTER(zfsvfs); 40343cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4035fa9e4066Sahrens 4036fa9e4066Sahrens if (protp) 4037fa9e4066Sahrens *protp = PROT_ALL; 4038fa9e4066Sahrens 4039fa9e4066Sahrens /* no faultahead (for now) */ 4040fa9e4066Sahrens if (pl == NULL) { 4041fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4042fa9e4066Sahrens return (0); 4043fa9e4066Sahrens } 4044fa9e4066Sahrens 4045fa9e4066Sahrens /* can't fault past EOF */ 4046fa9e4066Sahrens if (off >= zp->z_phys->zp_size) { 4047fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4048fa9e4066Sahrens return (EFAULT); 4049fa9e4066Sahrens } 4050fe2f476aSperrin orig_off = off; 4051fa9e4066Sahrens 4052fa9e4066Sahrens /* 4053fa9e4066Sahrens * If we already own the lock, then we must be page faulting 4054fa9e4066Sahrens * in the middle of a write to this file (i.e., we are writing 4055fa9e4066Sahrens * to this file using data from a mapped region of the file). 4056fa9e4066Sahrens */ 4057fe2f476aSperrin if (rw_owner(&zp->z_map_lock) != curthread) { 4058fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 4059fa9e4066Sahrens need_unlock = TRUE; 4060fa9e4066Sahrens } 4061fa9e4066Sahrens 4062fa9e4066Sahrens /* 4063fa9e4066Sahrens * Loop through the requested range [off, off + len] looking 4064fa9e4066Sahrens * for pages. If we don't find a page, we will need to create 4065fa9e4066Sahrens * a new page and fill it with data from the file. 4066fa9e4066Sahrens */ 4067fa9e4066Sahrens while (len > 0) { 4068fa9e4066Sahrens if (plsz < PAGESIZE) 4069fa9e4066Sahrens break; 4070fa9e4066Sahrens if (pp = page_lookup(vp, off, SE_SHARED)) { 4071fa9e4066Sahrens *pl++ = pp; 4072fa9e4066Sahrens off += PAGESIZE; 4073fa9e4066Sahrens addr += PAGESIZE; 4074fa9e4066Sahrens len -= PAGESIZE; 4075fa9e4066Sahrens plsz -= PAGESIZE; 4076fa9e4066Sahrens } else { 4077fa9e4066Sahrens err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw); 4078fe2f476aSperrin if (err) 4079fe2f476aSperrin goto out; 4080fa9e4066Sahrens /* 4081fa9e4066Sahrens * klustering may have changed our region 4082fa9e4066Sahrens * to be block aligned. 4083fa9e4066Sahrens */ 4084fa9e4066Sahrens if (((pp = *pl) != 0) && (off != pp->p_offset)) { 4085fa9e4066Sahrens int delta = off - pp->p_offset; 4086fa9e4066Sahrens len += delta; 4087fa9e4066Sahrens off -= delta; 4088fa9e4066Sahrens addr -= delta; 4089fa9e4066Sahrens } 4090fa9e4066Sahrens while (*pl) { 4091fa9e4066Sahrens pl++; 4092fa9e4066Sahrens off += PAGESIZE; 4093fa9e4066Sahrens addr += PAGESIZE; 4094fa9e4066Sahrens plsz -= PAGESIZE; 4095fa9e4066Sahrens if (len > PAGESIZE) 4096fa9e4066Sahrens len -= PAGESIZE; 4097fa9e4066Sahrens else 4098fa9e4066Sahrens len = 0; 4099fa9e4066Sahrens } 4100fa9e4066Sahrens } 4101fa9e4066Sahrens } 4102fa9e4066Sahrens 4103fa9e4066Sahrens /* 4104fa9e4066Sahrens * Fill out the page array with any pages already in the cache. 4105fa9e4066Sahrens */ 4106fa9e4066Sahrens while (plsz > 0) { 4107fa9e4066Sahrens pp = page_lookup_nowait(vp, off, SE_SHARED); 4108fa9e4066Sahrens if (pp == NULL) 4109fa9e4066Sahrens break; 4110fa9e4066Sahrens *pl++ = pp; 4111fa9e4066Sahrens off += PAGESIZE; 4112fa9e4066Sahrens plsz -= PAGESIZE; 4113fa9e4066Sahrens } 4114fa9e4066Sahrens 4115fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 4116fa9e4066Sahrens out: 4117fe2f476aSperrin /* 4118fe2f476aSperrin * We can't grab the range lock for the page as reader which would 4119fe2f476aSperrin * stop truncation as this leads to deadlock. So we need to recheck 4120fe2f476aSperrin * the file size. 4121fe2f476aSperrin */ 4122fe2f476aSperrin if (orig_off >= zp->z_phys->zp_size) 4123fe2f476aSperrin err = EFAULT; 4124fe2f476aSperrin if (err) { 4125fe2f476aSperrin /* 4126fe2f476aSperrin * Release any pages we have previously locked. 4127fe2f476aSperrin */ 4128fe2f476aSperrin while (pl > pl0) 4129fe2f476aSperrin page_unlock(*--pl); 4130fe2f476aSperrin } 4131fe2f476aSperrin 4132fa9e4066Sahrens *pl = NULL; 4133fa9e4066Sahrens 4134fa9e4066Sahrens if (need_unlock) 4135fa9e4066Sahrens rw_exit(&zp->z_map_lock); 4136fa9e4066Sahrens 4137fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4138fa9e4066Sahrens return (err); 4139fa9e4066Sahrens } 4140fa9e4066Sahrens 4141ea8dc4b6Seschrock /* 4142ea8dc4b6Seschrock * Request a memory map for a section of a file. This code interacts 4143ea8dc4b6Seschrock * with common code and the VM system as follows: 4144ea8dc4b6Seschrock * 4145ea8dc4b6Seschrock * common code calls mmap(), which ends up in smmap_common() 4146ea8dc4b6Seschrock * 4147ea8dc4b6Seschrock * this calls VOP_MAP(), which takes you into (say) zfs 4148ea8dc4b6Seschrock * 4149ea8dc4b6Seschrock * zfs_map() calls as_map(), passing segvn_create() as the callback 4150ea8dc4b6Seschrock * 4151ea8dc4b6Seschrock * segvn_create() creates the new segment and calls VOP_ADDMAP() 4152ea8dc4b6Seschrock * 4153ea8dc4b6Seschrock * zfs_addmap() updates z_mapcnt 4154ea8dc4b6Seschrock */ 4155da6c28aaSamw /*ARGSUSED*/ 4156fa9e4066Sahrens static int 4157fa9e4066Sahrens zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 4158da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4159da6c28aaSamw caller_context_t *ct) 4160fa9e4066Sahrens { 4161fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4162fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4163fa9e4066Sahrens segvn_crargs_t vn_a; 4164fa9e4066Sahrens int error; 4165fa9e4066Sahrens 41660616c50eSmarks ZFS_ENTER(zfsvfs); 41670616c50eSmarks ZFS_VERIFY_ZP(zp); 41680616c50eSmarks 4169da6c28aaSamw if ((prot & PROT_WRITE) && 4170da6c28aaSamw (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_READONLY | 41710616c50eSmarks ZFS_APPENDONLY))) { 41720616c50eSmarks ZFS_EXIT(zfsvfs); 4173da6c28aaSamw return (EPERM); 41740616c50eSmarks } 4175da6c28aaSamw 41760616c50eSmarks if ((prot & (PROT_READ | PROT_EXEC)) && 41770616c50eSmarks (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED)) { 41780616c50eSmarks ZFS_EXIT(zfsvfs); 41790616c50eSmarks return (EACCES); 41800616c50eSmarks } 4181fa9e4066Sahrens 4182fa9e4066Sahrens if (vp->v_flag & VNOMAP) { 4183fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4184fa9e4066Sahrens return (ENOSYS); 4185fa9e4066Sahrens } 4186fa9e4066Sahrens 4187fa9e4066Sahrens if (off < 0 || len > MAXOFFSET_T - off) { 4188fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4189fa9e4066Sahrens return (ENXIO); 4190fa9e4066Sahrens } 4191fa9e4066Sahrens 4192fa9e4066Sahrens if (vp->v_type != VREG) { 4193fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4194fa9e4066Sahrens return (ENODEV); 4195fa9e4066Sahrens } 4196fa9e4066Sahrens 4197fa9e4066Sahrens /* 4198fa9e4066Sahrens * If file is locked, disallow mapping. 4199fa9e4066Sahrens */ 4200ea8dc4b6Seschrock if (MANDMODE((mode_t)zp->z_phys->zp_mode) && vn_has_flocks(vp)) { 4201ea8dc4b6Seschrock ZFS_EXIT(zfsvfs); 4202ea8dc4b6Seschrock return (EAGAIN); 4203fa9e4066Sahrens } 4204fa9e4066Sahrens 4205fa9e4066Sahrens as_rangelock(as); 420660946fe0Smec error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); 420760946fe0Smec if (error != 0) { 420860946fe0Smec as_rangeunlock(as); 420960946fe0Smec ZFS_EXIT(zfsvfs); 421060946fe0Smec return (error); 4211fa9e4066Sahrens } 4212fa9e4066Sahrens 4213fa9e4066Sahrens vn_a.vp = vp; 4214fa9e4066Sahrens vn_a.offset = (u_offset_t)off; 4215fa9e4066Sahrens vn_a.type = flags & MAP_TYPE; 4216fa9e4066Sahrens vn_a.prot = prot; 4217fa9e4066Sahrens vn_a.maxprot = maxprot; 4218fa9e4066Sahrens vn_a.cred = cr; 4219fa9e4066Sahrens vn_a.amp = NULL; 4220fa9e4066Sahrens vn_a.flags = flags & ~MAP_TYPE; 42214944b02eSkchow vn_a.szc = 0; 42224944b02eSkchow vn_a.lgrp_mem_policy_flags = 0; 4223fa9e4066Sahrens 4224fa9e4066Sahrens error = as_map(as, *addrp, len, segvn_create, &vn_a); 4225fa9e4066Sahrens 4226fa9e4066Sahrens as_rangeunlock(as); 4227fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4228fa9e4066Sahrens return (error); 4229fa9e4066Sahrens } 4230fa9e4066Sahrens 4231fa9e4066Sahrens /* ARGSUSED */ 4232fa9e4066Sahrens static int 4233fa9e4066Sahrens zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4234da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4235da6c28aaSamw caller_context_t *ct) 4236fa9e4066Sahrens { 4237ea8dc4b6Seschrock uint64_t pages = btopr(len); 4238ea8dc4b6Seschrock 4239ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 4240fa9e4066Sahrens return (0); 4241fa9e4066Sahrens } 4242fa9e4066Sahrens 4243b468a217Seschrock /* 4244b468a217Seschrock * The reason we push dirty pages as part of zfs_delmap() is so that we get a 4245b468a217Seschrock * more accurate mtime for the associated file. Since we don't have a way of 4246b468a217Seschrock * detecting when the data was actually modified, we have to resort to 4247b468a217Seschrock * heuristics. If an explicit msync() is done, then we mark the mtime when the 4248b468a217Seschrock * last page is pushed. The problem occurs when the msync() call is omitted, 4249b468a217Seschrock * which by far the most common case: 4250b468a217Seschrock * 4251b468a217Seschrock * open() 4252b468a217Seschrock * mmap() 4253b468a217Seschrock * <modify memory> 4254b468a217Seschrock * munmap() 4255b468a217Seschrock * close() 4256b468a217Seschrock * <time lapse> 4257b468a217Seschrock * putpage() via fsflush 4258b468a217Seschrock * 4259b468a217Seschrock * If we wait until fsflush to come along, we can have a modification time that 4260b468a217Seschrock * is some arbitrary point in the future. In order to prevent this in the 4261b468a217Seschrock * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is 4262b468a217Seschrock * torn down. 4263b468a217Seschrock */ 4264fa9e4066Sahrens /* ARGSUSED */ 4265fa9e4066Sahrens static int 4266fa9e4066Sahrens zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4267da6c28aaSamw size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr, 4268da6c28aaSamw caller_context_t *ct) 4269fa9e4066Sahrens { 4270ea8dc4b6Seschrock uint64_t pages = btopr(len); 4271ea8dc4b6Seschrock 4272ea8dc4b6Seschrock ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 4273ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 4274b468a217Seschrock 4275b468a217Seschrock if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && 4276b468a217Seschrock vn_has_cached_data(vp)) 4277da6c28aaSamw (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct); 4278b468a217Seschrock 4279fa9e4066Sahrens return (0); 4280fa9e4066Sahrens } 4281fa9e4066Sahrens 4282fa9e4066Sahrens /* 4283fa9e4066Sahrens * Free or allocate space in a file. Currently, this function only 4284fa9e4066Sahrens * supports the `F_FREESP' command. However, this command is somewhat 4285fa9e4066Sahrens * misnamed, as its functionality includes the ability to allocate as 4286fa9e4066Sahrens * well as free space. 4287fa9e4066Sahrens * 4288fa9e4066Sahrens * IN: vp - vnode of file to free data in. 4289fa9e4066Sahrens * cmd - action to take (only F_FREESP supported). 4290fa9e4066Sahrens * bfp - section of file to free/alloc. 4291fa9e4066Sahrens * flag - current file open mode flags. 4292fa9e4066Sahrens * offset - current file offset. 4293fa9e4066Sahrens * cr - credentials of caller [UNUSED]. 4294da6c28aaSamw * ct - caller context. 4295fa9e4066Sahrens * 4296fa9e4066Sahrens * RETURN: 0 if success 4297fa9e4066Sahrens * error code if failure 4298fa9e4066Sahrens * 4299fa9e4066Sahrens * Timestamps: 4300fa9e4066Sahrens * vp - ctime|mtime updated 4301fa9e4066Sahrens */ 4302fa9e4066Sahrens /* ARGSUSED */ 4303fa9e4066Sahrens static int 4304fa9e4066Sahrens zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 4305fa9e4066Sahrens offset_t offset, cred_t *cr, caller_context_t *ct) 4306fa9e4066Sahrens { 4307fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4308fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4309fa9e4066Sahrens uint64_t off, len; 4310fa9e4066Sahrens int error; 4311fa9e4066Sahrens 43123cb34c60Sahrens ZFS_ENTER(zfsvfs); 43133cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4314fa9e4066Sahrens 4315fa9e4066Sahrens if (cmd != F_FREESP) { 4316fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4317fa9e4066Sahrens return (EINVAL); 4318fa9e4066Sahrens } 4319fa9e4066Sahrens 4320fa9e4066Sahrens if (error = convoff(vp, bfp, 0, offset)) { 4321fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4322fa9e4066Sahrens return (error); 4323fa9e4066Sahrens } 4324fa9e4066Sahrens 4325fa9e4066Sahrens if (bfp->l_len < 0) { 4326fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4327fa9e4066Sahrens return (EINVAL); 4328fa9e4066Sahrens } 4329fa9e4066Sahrens 4330fa9e4066Sahrens off = bfp->l_start; 4331104e2ed7Sperrin len = bfp->l_len; /* 0 means from off to end of file */ 4332104e2ed7Sperrin 4333cdb0ab79Smaybee error = zfs_freesp(zp, off, len, flag, TRUE); 4334fa9e4066Sahrens 4335fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4336fa9e4066Sahrens return (error); 4337fa9e4066Sahrens } 4338fa9e4066Sahrens 4339da6c28aaSamw /*ARGSUSED*/ 4340fa9e4066Sahrens static int 4341da6c28aaSamw zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct) 4342fa9e4066Sahrens { 4343fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4344fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4345f18faf3fSek uint32_t gen; 4346fa9e4066Sahrens uint64_t object = zp->z_id; 4347fa9e4066Sahrens zfid_short_t *zfid; 4348fa9e4066Sahrens int size, i; 4349fa9e4066Sahrens 43503cb34c60Sahrens ZFS_ENTER(zfsvfs); 43513cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4352f18faf3fSek gen = (uint32_t)zp->z_gen; 4353fa9e4066Sahrens 4354fa9e4066Sahrens size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 4355fa9e4066Sahrens if (fidp->fid_len < size) { 4356fa9e4066Sahrens fidp->fid_len = size; 43570f2dc02eSek ZFS_EXIT(zfsvfs); 4358fa9e4066Sahrens return (ENOSPC); 4359fa9e4066Sahrens } 4360fa9e4066Sahrens 4361fa9e4066Sahrens zfid = (zfid_short_t *)fidp; 4362fa9e4066Sahrens 4363fa9e4066Sahrens zfid->zf_len = size; 4364fa9e4066Sahrens 4365fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_object); i++) 4366fa9e4066Sahrens zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 4367fa9e4066Sahrens 4368fa9e4066Sahrens /* Must have a non-zero generation number to distinguish from .zfs */ 4369fa9e4066Sahrens if (gen == 0) 4370fa9e4066Sahrens gen = 1; 4371fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_gen); i++) 4372fa9e4066Sahrens zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 4373fa9e4066Sahrens 4374fa9e4066Sahrens if (size == LONG_FID_LEN) { 4375fa9e4066Sahrens uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 4376fa9e4066Sahrens zfid_long_t *zlfid; 4377fa9e4066Sahrens 4378fa9e4066Sahrens zlfid = (zfid_long_t *)fidp; 4379fa9e4066Sahrens 4380fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setid); i++) 4381fa9e4066Sahrens zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 4382fa9e4066Sahrens 4383fa9e4066Sahrens /* XXX - this should be the generation number for the objset */ 4384fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 4385fa9e4066Sahrens zlfid->zf_setgen[i] = 0; 4386fa9e4066Sahrens } 4387fa9e4066Sahrens 4388fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4389fa9e4066Sahrens return (0); 4390fa9e4066Sahrens } 4391fa9e4066Sahrens 4392fa9e4066Sahrens static int 4393da6c28aaSamw zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, 4394da6c28aaSamw caller_context_t *ct) 4395fa9e4066Sahrens { 4396fa9e4066Sahrens znode_t *zp, *xzp; 4397fa9e4066Sahrens zfsvfs_t *zfsvfs; 4398fa9e4066Sahrens zfs_dirlock_t *dl; 4399fa9e4066Sahrens int error; 4400fa9e4066Sahrens 4401fa9e4066Sahrens switch (cmd) { 4402fa9e4066Sahrens case _PC_LINK_MAX: 4403fa9e4066Sahrens *valp = ULONG_MAX; 4404fa9e4066Sahrens return (0); 4405fa9e4066Sahrens 4406fa9e4066Sahrens case _PC_FILESIZEBITS: 4407fa9e4066Sahrens *valp = 64; 4408fa9e4066Sahrens return (0); 4409fa9e4066Sahrens 4410fa9e4066Sahrens case _PC_XATTR_EXISTS: 4411fa9e4066Sahrens zp = VTOZ(vp); 4412fa9e4066Sahrens zfsvfs = zp->z_zfsvfs; 44133cb34c60Sahrens ZFS_ENTER(zfsvfs); 44143cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4415fa9e4066Sahrens *valp = 0; 4416fa9e4066Sahrens error = zfs_dirent_lock(&dl, zp, "", &xzp, 4417da6c28aaSamw ZXATTR | ZEXISTS | ZSHARED, NULL, NULL); 4418fa9e4066Sahrens if (error == 0) { 4419fa9e4066Sahrens zfs_dirent_unlock(dl); 4420fa9e4066Sahrens if (!zfs_dirempty(xzp)) 4421fa9e4066Sahrens *valp = 1; 4422fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 4423fa9e4066Sahrens } else if (error == ENOENT) { 4424fa9e4066Sahrens /* 4425fa9e4066Sahrens * If there aren't extended attributes, it's the 4426fa9e4066Sahrens * same as having zero of them. 4427fa9e4066Sahrens */ 4428fa9e4066Sahrens error = 0; 4429fa9e4066Sahrens } 4430fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4431fa9e4066Sahrens return (error); 4432fa9e4066Sahrens 4433da6c28aaSamw case _PC_SATTR_ENABLED: 4434da6c28aaSamw case _PC_SATTR_EXISTS: 44359660e5cbSJanice Chang *valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 4436da6c28aaSamw (vp->v_type == VREG || vp->v_type == VDIR); 4437da6c28aaSamw return (0); 4438da6c28aaSamw 4439fa9e4066Sahrens case _PC_ACL_ENABLED: 4440fa9e4066Sahrens *valp = _ACL_ACE_ENABLED; 4441fa9e4066Sahrens return (0); 4442fa9e4066Sahrens 4443fa9e4066Sahrens case _PC_MIN_HOLE_SIZE: 4444fa9e4066Sahrens *valp = (ulong_t)SPA_MINBLOCKSIZE; 4445fa9e4066Sahrens return (0); 4446fa9e4066Sahrens 4447fa9e4066Sahrens default: 4448da6c28aaSamw return (fs_pathconf(vp, cmd, valp, cr, ct)); 4449fa9e4066Sahrens } 4450fa9e4066Sahrens } 4451fa9e4066Sahrens 4452fa9e4066Sahrens /*ARGSUSED*/ 4453fa9e4066Sahrens static int 4454da6c28aaSamw zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4455da6c28aaSamw caller_context_t *ct) 4456fa9e4066Sahrens { 4457fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4458fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4459fa9e4066Sahrens int error; 4460da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4461fa9e4066Sahrens 44623cb34c60Sahrens ZFS_ENTER(zfsvfs); 44633cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4464da6c28aaSamw error = zfs_getacl(zp, vsecp, skipaclchk, cr); 4465fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4466fa9e4066Sahrens 4467fa9e4066Sahrens return (error); 4468fa9e4066Sahrens } 4469fa9e4066Sahrens 4470fa9e4066Sahrens /*ARGSUSED*/ 4471fa9e4066Sahrens static int 4472da6c28aaSamw zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4473da6c28aaSamw caller_context_t *ct) 4474fa9e4066Sahrens { 4475fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4476fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4477fa9e4066Sahrens int error; 4478da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4479fa9e4066Sahrens 44803cb34c60Sahrens ZFS_ENTER(zfsvfs); 44813cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4482da6c28aaSamw error = zfs_setacl(zp, vsecp, skipaclchk, cr); 4483fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4484fa9e4066Sahrens return (error); 4485fa9e4066Sahrens } 4486fa9e4066Sahrens 4487fa9e4066Sahrens /* 4488fa9e4066Sahrens * Predeclare these here so that the compiler assumes that 4489fa9e4066Sahrens * this is an "old style" function declaration that does 4490fa9e4066Sahrens * not include arguments => we won't get type mismatch errors 4491fa9e4066Sahrens * in the initializations that follow. 4492fa9e4066Sahrens */ 4493fa9e4066Sahrens static int zfs_inval(); 4494fa9e4066Sahrens static int zfs_isdir(); 4495fa9e4066Sahrens 4496fa9e4066Sahrens static int 4497fa9e4066Sahrens zfs_inval() 4498fa9e4066Sahrens { 4499fa9e4066Sahrens return (EINVAL); 4500fa9e4066Sahrens } 4501fa9e4066Sahrens 4502fa9e4066Sahrens static int 4503fa9e4066Sahrens zfs_isdir() 4504fa9e4066Sahrens { 4505fa9e4066Sahrens return (EISDIR); 4506fa9e4066Sahrens } 4507fa9e4066Sahrens /* 4508fa9e4066Sahrens * Directory vnode operations template 4509fa9e4066Sahrens */ 4510fa9e4066Sahrens vnodeops_t *zfs_dvnodeops; 4511fa9e4066Sahrens const fs_operation_def_t zfs_dvnodeops_template[] = { 4512aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4513aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4514aa59c4cbSrsb VOPNAME_READ, { .error = zfs_isdir }, 4515aa59c4cbSrsb VOPNAME_WRITE, { .error = zfs_isdir }, 4516aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4517aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4518aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4519aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4520aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4521aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4522aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4523aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4524aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4525aa59c4cbSrsb VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, 4526aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4527aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4528aa59c4cbSrsb VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, 4529aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4530aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4531aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4532aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4533aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4534aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4535aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4536df2381bfSpraks VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4537aa59c4cbSrsb NULL, NULL 4538fa9e4066Sahrens }; 4539fa9e4066Sahrens 4540fa9e4066Sahrens /* 4541fa9e4066Sahrens * Regular file vnode operations template 4542fa9e4066Sahrens */ 4543fa9e4066Sahrens vnodeops_t *zfs_fvnodeops; 4544fa9e4066Sahrens const fs_operation_def_t zfs_fvnodeops_template[] = { 4545aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4546aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4547aa59c4cbSrsb VOPNAME_READ, { .vop_read = zfs_read }, 4548aa59c4cbSrsb VOPNAME_WRITE, { .vop_write = zfs_write }, 4549aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4550aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4551aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4552aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4553aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4554aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4555aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4556aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4557aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4558aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4559aa59c4cbSrsb VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, 4560aa59c4cbSrsb VOPNAME_SPACE, { .vop_space = zfs_space }, 4561aa59c4cbSrsb VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, 4562aa59c4cbSrsb VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, 4563aa59c4cbSrsb VOPNAME_MAP, { .vop_map = zfs_map }, 4564aa59c4cbSrsb VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, 4565aa59c4cbSrsb VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, 4566aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4567aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4568aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4569aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4570aa59c4cbSrsb NULL, NULL 4571fa9e4066Sahrens }; 4572fa9e4066Sahrens 4573fa9e4066Sahrens /* 4574fa9e4066Sahrens * Symbolic link vnode operations template 4575fa9e4066Sahrens */ 4576fa9e4066Sahrens vnodeops_t *zfs_symvnodeops; 4577fa9e4066Sahrens const fs_operation_def_t zfs_symvnodeops_template[] = { 4578aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4579aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4580aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4581aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4582aa59c4cbSrsb VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, 4583aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4584aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4585aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4586aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4587aa59c4cbSrsb NULL, NULL 4588fa9e4066Sahrens }; 4589fa9e4066Sahrens 4590fa9e4066Sahrens /* 4591fa9e4066Sahrens * Extended attribute directory vnode operations template 4592fa9e4066Sahrens * This template is identical to the directory vnodes 4593fa9e4066Sahrens * operation template except for restricted operations: 4594fa9e4066Sahrens * VOP_MKDIR() 4595fa9e4066Sahrens * VOP_SYMLINK() 4596fa9e4066Sahrens * Note that there are other restrictions embedded in: 4597fa9e4066Sahrens * zfs_create() - restrict type to VREG 4598fa9e4066Sahrens * zfs_link() - no links into/out of attribute space 4599fa9e4066Sahrens * zfs_rename() - no moves into/out of attribute space 4600fa9e4066Sahrens */ 4601fa9e4066Sahrens vnodeops_t *zfs_xdvnodeops; 4602fa9e4066Sahrens const fs_operation_def_t zfs_xdvnodeops_template[] = { 4603aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4604aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4605aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4606aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4607aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4608aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4609aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4610aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4611aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4612aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4613aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4614aa59c4cbSrsb VOPNAME_MKDIR, { .error = zfs_inval }, 4615aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4616aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4617aa59c4cbSrsb VOPNAME_SYMLINK, { .error = zfs_inval }, 4618aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4619aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4620aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4621aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4622aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4623aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4624aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4625aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4626aa59c4cbSrsb NULL, NULL 4627fa9e4066Sahrens }; 4628fa9e4066Sahrens 4629fa9e4066Sahrens /* 4630fa9e4066Sahrens * Error vnode operations template 4631fa9e4066Sahrens */ 4632fa9e4066Sahrens vnodeops_t *zfs_evnodeops; 4633fa9e4066Sahrens const fs_operation_def_t zfs_evnodeops_template[] = { 4634aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4635aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4636aa59c4cbSrsb NULL, NULL 4637fa9e4066Sahrens }; 4638