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> 48*0fab61baSJonathan W Adams #include <vm/kpm.h> 49*0fab61baSJonathan 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> 68fa9e4066Sahrens #include "fs/fs_subr.h" 69fa9e4066Sahrens #include <sys/zfs_ctldir.h> 70da6c28aaSamw #include <sys/zfs_fuid.h> 71033f9833Sek #include <sys/dnlc.h> 72104e2ed7Sperrin #include <sys/zfs_rlock.h> 73da6c28aaSamw #include <sys/extdirent.h> 74da6c28aaSamw #include <sys/kidmap.h> 75da6c28aaSamw #include <sys/cred_impl.h> 76b38f0970Sck #include <sys/attr.h> 77fa9e4066Sahrens 78fa9e4066Sahrens /* 79fa9e4066Sahrens * Programming rules. 80fa9e4066Sahrens * 81fa9e4066Sahrens * Each vnode op performs some logical unit of work. To do this, the ZPL must 82fa9e4066Sahrens * properly lock its in-core state, create a DMU transaction, do the work, 83fa9e4066Sahrens * record this work in the intent log (ZIL), commit the DMU transaction, 84da6c28aaSamw * and wait for the intent log to commit if it is a synchronous operation. 85da6c28aaSamw * Moreover, the vnode ops must work in both normal and log replay context. 86fa9e4066Sahrens * The ordering of events is important to avoid deadlocks and references 87fa9e4066Sahrens * to freed memory. The example below illustrates the following Big Rules: 88fa9e4066Sahrens * 89fa9e4066Sahrens * (1) A check must be made in each zfs thread for a mounted file system. 903cb34c60Sahrens * This is done avoiding races using ZFS_ENTER(zfsvfs). 913cb34c60Sahrens * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes 923cb34c60Sahrens * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros 933cb34c60Sahrens * can return EIO from the calling function. 94fa9e4066Sahrens * 95fa9e4066Sahrens * (2) VN_RELE() should always be the last thing except for zil_commit() 96b19a79ecSperrin * (if necessary) and ZFS_EXIT(). This is for 3 reasons: 97fa9e4066Sahrens * First, if it's the last reference, the vnode/znode 98fa9e4066Sahrens * can be freed, so the zp may point to freed memory. Second, the last 99fa9e4066Sahrens * reference will call zfs_zinactive(), which may induce a lot of work -- 100104e2ed7Sperrin * pushing cached pages (which acquires range locks) and syncing out 101fa9e4066Sahrens * cached atime changes. Third, zfs_zinactive() may require a new tx, 102fa9e4066Sahrens * which could deadlock the system if you were already holding one. 103fa9e4066Sahrens * 1047885c754Sperrin * (3) All range locks must be grabbed before calling dmu_tx_assign(), 1057885c754Sperrin * as they can span dmu_tx_assign() calls. 1067885c754Sperrin * 1077885c754Sperrin * (4) Always pass zfsvfs->z_assign as the second argument to dmu_tx_assign(). 108fa9e4066Sahrens * In normal operation, this will be TXG_NOWAIT. During ZIL replay, 109fa9e4066Sahrens * it will be a specific txg. Either way, dmu_tx_assign() never blocks. 110fa9e4066Sahrens * This is critical because we don't want to block while holding locks. 111fa9e4066Sahrens * Note, in particular, that if a lock is sometimes acquired before 112fa9e4066Sahrens * the tx assigns, and sometimes after (e.g. z_lock), then failing to 113fa9e4066Sahrens * use a non-blocking assign can deadlock the system. The scenario: 114fa9e4066Sahrens * 115fa9e4066Sahrens * Thread A has grabbed a lock before calling dmu_tx_assign(). 116fa9e4066Sahrens * Thread B is in an already-assigned tx, and blocks for this lock. 117fa9e4066Sahrens * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 118fa9e4066Sahrens * forever, because the previous txg can't quiesce until B's tx commits. 119fa9e4066Sahrens * 120fa9e4066Sahrens * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 1218a2f1b91Sahrens * then drop all locks, call dmu_tx_wait(), and try again. 122fa9e4066Sahrens * 1237885c754Sperrin * (5) If the operation succeeded, generate the intent log entry for it 124fa9e4066Sahrens * before dropping locks. This ensures that the ordering of events 125fa9e4066Sahrens * in the intent log matches the order in which they actually occurred. 126fa9e4066Sahrens * 1277885c754Sperrin * (6) At the end of each vnode op, the DMU tx must always commit, 128fa9e4066Sahrens * regardless of whether there were any errors. 129fa9e4066Sahrens * 130b19a79ecSperrin * (7) After dropping all locks, invoke zil_commit(zilog, seq, foid) 131fa9e4066Sahrens * to ensure that synchronous semantics are provided when necessary. 132fa9e4066Sahrens * 133fa9e4066Sahrens * In general, this is how things should be ordered in each vnode op: 134fa9e4066Sahrens * 135fa9e4066Sahrens * ZFS_ENTER(zfsvfs); // exit if unmounted 136fa9e4066Sahrens * top: 137fa9e4066Sahrens * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 138fa9e4066Sahrens * rw_enter(...); // grab any other locks you need 139fa9e4066Sahrens * tx = dmu_tx_create(...); // get DMU tx 140fa9e4066Sahrens * dmu_tx_hold_*(); // hold each object you might modify 141fa9e4066Sahrens * error = dmu_tx_assign(tx, zfsvfs->z_assign); // try to assign 142fa9e4066Sahrens * if (error) { 143fa9e4066Sahrens * rw_exit(...); // drop locks 144fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 145fa9e4066Sahrens * VN_RELE(...); // release held vnodes 146fa9e4066Sahrens * if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 1478a2f1b91Sahrens * dmu_tx_wait(tx); 1488a2f1b91Sahrens * dmu_tx_abort(tx); 149fa9e4066Sahrens * goto top; 150fa9e4066Sahrens * } 1518a2f1b91Sahrens * dmu_tx_abort(tx); // abort DMU tx 152fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 153fa9e4066Sahrens * return (error); // really out of space 154fa9e4066Sahrens * } 155fa9e4066Sahrens * error = do_real_work(); // do whatever this VOP does 156fa9e4066Sahrens * if (error == 0) 157b19a79ecSperrin * zfs_log_*(...); // on success, make ZIL entry 158fa9e4066Sahrens * dmu_tx_commit(tx); // commit DMU tx -- error or not 159fa9e4066Sahrens * rw_exit(...); // drop locks 160fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 161fa9e4066Sahrens * VN_RELE(...); // release held vnodes 162b19a79ecSperrin * zil_commit(zilog, seq, foid); // synchronous when necessary 163fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 164fa9e4066Sahrens * return (error); // done, report error 165fa9e4066Sahrens */ 1663cb34c60Sahrens 167fa9e4066Sahrens /* ARGSUSED */ 168fa9e4066Sahrens static int 169da6c28aaSamw zfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) 170fa9e4066Sahrens { 17167bd71c6Sperrin znode_t *zp = VTOZ(*vpp); 17267bd71c6Sperrin 173da6c28aaSamw if ((flag & FWRITE) && (zp->z_phys->zp_flags & ZFS_APPENDONLY) && 174da6c28aaSamw ((flag & FAPPEND) == 0)) { 175da6c28aaSamw return (EPERM); 176da6c28aaSamw } 177da6c28aaSamw 178da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 179da6c28aaSamw ZTOV(zp)->v_type == VREG && 180da6c28aaSamw !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) && 181da6c28aaSamw zp->z_phys->zp_size > 0) 182da6c28aaSamw if (fs_vscan(*vpp, cr, 0) != 0) 183da6c28aaSamw return (EACCES); 184da6c28aaSamw 18567bd71c6Sperrin /* Keep a count of the synchronous opens in the znode */ 18667bd71c6Sperrin if (flag & (FSYNC | FDSYNC)) 18767bd71c6Sperrin atomic_inc_32(&zp->z_sync_cnt); 188da6c28aaSamw 189fa9e4066Sahrens return (0); 190fa9e4066Sahrens } 191fa9e4066Sahrens 192fa9e4066Sahrens /* ARGSUSED */ 193fa9e4066Sahrens static int 194da6c28aaSamw zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, 195da6c28aaSamw caller_context_t *ct) 196fa9e4066Sahrens { 19767bd71c6Sperrin znode_t *zp = VTOZ(vp); 19867bd71c6Sperrin 19967bd71c6Sperrin /* Decrement the synchronous opens in the znode */ 200ecb72030Sperrin if ((flag & (FSYNC | FDSYNC)) && (count == 1)) 20167bd71c6Sperrin atomic_dec_32(&zp->z_sync_cnt); 20267bd71c6Sperrin 203fa9e4066Sahrens /* 204fa9e4066Sahrens * Clean up any locks held by this process on the vp. 205fa9e4066Sahrens */ 206fa9e4066Sahrens cleanlocks(vp, ddi_get_pid(), 0); 207fa9e4066Sahrens cleanshares(vp, ddi_get_pid()); 208fa9e4066Sahrens 209da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 210da6c28aaSamw ZTOV(zp)->v_type == VREG && 211da6c28aaSamw !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) && 212da6c28aaSamw zp->z_phys->zp_size > 0) 213da6c28aaSamw VERIFY(fs_vscan(vp, cr, 1) == 0); 214da6c28aaSamw 215fa9e4066Sahrens return (0); 216fa9e4066Sahrens } 217fa9e4066Sahrens 218fa9e4066Sahrens /* 219fa9e4066Sahrens * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 220fa9e4066Sahrens * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 221fa9e4066Sahrens */ 222fa9e4066Sahrens static int 223fa9e4066Sahrens zfs_holey(vnode_t *vp, int cmd, offset_t *off) 224fa9e4066Sahrens { 225fa9e4066Sahrens znode_t *zp = VTOZ(vp); 226fa9e4066Sahrens uint64_t noff = (uint64_t)*off; /* new offset */ 227fa9e4066Sahrens uint64_t file_sz; 228fa9e4066Sahrens int error; 229fa9e4066Sahrens boolean_t hole; 230fa9e4066Sahrens 231fa9e4066Sahrens file_sz = zp->z_phys->zp_size; 232fa9e4066Sahrens if (noff >= file_sz) { 233fa9e4066Sahrens return (ENXIO); 234fa9e4066Sahrens } 235fa9e4066Sahrens 236fa9e4066Sahrens if (cmd == _FIO_SEEK_HOLE) 237fa9e4066Sahrens hole = B_TRUE; 238fa9e4066Sahrens else 239fa9e4066Sahrens hole = B_FALSE; 240fa9e4066Sahrens 241fa9e4066Sahrens error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 242fa9e4066Sahrens 243fa9e4066Sahrens /* end of file? */ 244fa9e4066Sahrens if ((error == ESRCH) || (noff > file_sz)) { 245fa9e4066Sahrens /* 246fa9e4066Sahrens * Handle the virtual hole at the end of file. 247fa9e4066Sahrens */ 248fa9e4066Sahrens if (hole) { 249fa9e4066Sahrens *off = file_sz; 250fa9e4066Sahrens return (0); 251fa9e4066Sahrens } 252fa9e4066Sahrens return (ENXIO); 253fa9e4066Sahrens } 254fa9e4066Sahrens 255fa9e4066Sahrens if (noff < *off) 256fa9e4066Sahrens return (error); 257fa9e4066Sahrens *off = noff; 258fa9e4066Sahrens return (error); 259fa9e4066Sahrens } 260fa9e4066Sahrens 261fa9e4066Sahrens /* ARGSUSED */ 262fa9e4066Sahrens static int 263fa9e4066Sahrens zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred, 264da6c28aaSamw int *rvalp, caller_context_t *ct) 265fa9e4066Sahrens { 266fa9e4066Sahrens offset_t off; 267fa9e4066Sahrens int error; 268fa9e4066Sahrens zfsvfs_t *zfsvfs; 269f18faf3fSek znode_t *zp; 270fa9e4066Sahrens 271fa9e4066Sahrens switch (com) { 272ecb72030Sperrin case _FIOFFS: 273fa9e4066Sahrens return (zfs_sync(vp->v_vfsp, 0, cred)); 274fa9e4066Sahrens 275ea8dc4b6Seschrock /* 276ea8dc4b6Seschrock * The following two ioctls are used by bfu. Faking out, 277ea8dc4b6Seschrock * necessary to avoid bfu errors. 278ea8dc4b6Seschrock */ 279ecb72030Sperrin case _FIOGDIO: 280ecb72030Sperrin case _FIOSDIO: 281ea8dc4b6Seschrock return (0); 282ea8dc4b6Seschrock 283ecb72030Sperrin case _FIO_SEEK_DATA: 284ecb72030Sperrin case _FIO_SEEK_HOLE: 285fa9e4066Sahrens if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 286fa9e4066Sahrens return (EFAULT); 287fa9e4066Sahrens 288f18faf3fSek zp = VTOZ(vp); 289f18faf3fSek zfsvfs = zp->z_zfsvfs; 2903cb34c60Sahrens ZFS_ENTER(zfsvfs); 2913cb34c60Sahrens ZFS_VERIFY_ZP(zp); 292fa9e4066Sahrens 293fa9e4066Sahrens /* offset parameter is in/out */ 294fa9e4066Sahrens error = zfs_holey(vp, com, &off); 295fa9e4066Sahrens ZFS_EXIT(zfsvfs); 296fa9e4066Sahrens if (error) 297fa9e4066Sahrens return (error); 298fa9e4066Sahrens if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 299fa9e4066Sahrens return (EFAULT); 300fa9e4066Sahrens return (0); 301fa9e4066Sahrens } 302fa9e4066Sahrens return (ENOTTY); 303fa9e4066Sahrens } 304fa9e4066Sahrens 305*0fab61baSJonathan W Adams /* 306*0fab61baSJonathan W Adams * Utility functions to map and unmap a single physical page. These 307*0fab61baSJonathan W Adams * are used to manage the mappable copies of ZFS file data, and therefore 308*0fab61baSJonathan W Adams * do not update ref/mod bits. 309*0fab61baSJonathan W Adams */ 310*0fab61baSJonathan W Adams caddr_t 311*0fab61baSJonathan W Adams zfs_map_page(page_t *pp, enum seg_rw rw) 312*0fab61baSJonathan W Adams { 313*0fab61baSJonathan W Adams if (kpm_enable) 314*0fab61baSJonathan W Adams return (hat_kpm_mapin(pp, 0)); 315*0fab61baSJonathan W Adams ASSERT(rw == S_READ || rw == S_WRITE); 316*0fab61baSJonathan W Adams return (ppmapin(pp, PROT_READ | ((rw == S_WRITE) ? PROT_WRITE : 0), 317*0fab61baSJonathan W Adams (caddr_t)-1)); 318*0fab61baSJonathan W Adams } 319*0fab61baSJonathan W Adams 320*0fab61baSJonathan W Adams void 321*0fab61baSJonathan W Adams zfs_unmap_page(page_t *pp, caddr_t addr) 322*0fab61baSJonathan W Adams { 323*0fab61baSJonathan W Adams if (kpm_enable) { 324*0fab61baSJonathan W Adams hat_kpm_mapout(pp, 0, addr); 325*0fab61baSJonathan W Adams } else { 326*0fab61baSJonathan W Adams ppmapout(addr); 327*0fab61baSJonathan W Adams } 328*0fab61baSJonathan W Adams } 329*0fab61baSJonathan W Adams 330fa9e4066Sahrens /* 331fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 332fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 333fa9e4066Sahrens * 334fa9e4066Sahrens * On Write: If we find a memory mapped page, we write to *both* 335fa9e4066Sahrens * the page and the dmu buffer. 336fa9e4066Sahrens * 337fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 338fa9e4066Sahrens * the file is memory mapped. 339fa9e4066Sahrens */ 340fa9e4066Sahrens static int 341feb08c6bSbillm mappedwrite(vnode_t *vp, int nbytes, uio_t *uio, dmu_tx_t *tx) 342fa9e4066Sahrens { 343fa9e4066Sahrens znode_t *zp = VTOZ(vp); 344fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 345fa9e4066Sahrens int64_t start, off; 346fa9e4066Sahrens int len = nbytes; 347fa9e4066Sahrens int error = 0; 348fa9e4066Sahrens 349fa9e4066Sahrens start = uio->uio_loffset; 350fa9e4066Sahrens off = start & PAGEOFFSET; 351fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 352fa9e4066Sahrens page_t *pp; 353fa9e4066Sahrens uint64_t bytes = MIN(PAGESIZE - off, len); 354feb08c6bSbillm uint64_t woff = uio->uio_loffset; 355fa9e4066Sahrens 356fa9e4066Sahrens /* 357fa9e4066Sahrens * We don't want a new page to "appear" in the middle of 358fa9e4066Sahrens * the file update (because it may not get the write 359fa9e4066Sahrens * update data), so we grab a lock to block 360fa9e4066Sahrens * zfs_getpage(). 361fa9e4066Sahrens */ 362fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 363fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 364fa9e4066Sahrens caddr_t va; 365fa9e4066Sahrens 366fa9e4066Sahrens rw_exit(&zp->z_map_lock); 367*0fab61baSJonathan W Adams va = zfs_map_page(pp, S_WRITE); 368fa9e4066Sahrens error = uiomove(va+off, bytes, UIO_WRITE, uio); 369fa9e4066Sahrens if (error == 0) { 370fa9e4066Sahrens dmu_write(zfsvfs->z_os, zp->z_id, 371fa9e4066Sahrens woff, bytes, va+off, tx); 372fa9e4066Sahrens } 373*0fab61baSJonathan W Adams zfs_unmap_page(pp, va); 374fa9e4066Sahrens page_unlock(pp); 375fa9e4066Sahrens } else { 376fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 377feb08c6bSbillm uio, bytes, tx); 378fa9e4066Sahrens rw_exit(&zp->z_map_lock); 379fa9e4066Sahrens } 380fa9e4066Sahrens len -= bytes; 381fa9e4066Sahrens off = 0; 382fa9e4066Sahrens if (error) 383fa9e4066Sahrens break; 384fa9e4066Sahrens } 385fa9e4066Sahrens return (error); 386fa9e4066Sahrens } 387fa9e4066Sahrens 388fa9e4066Sahrens /* 389fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 390fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 391fa9e4066Sahrens * 392fa9e4066Sahrens * On Read: We "read" preferentially from memory mapped pages, 393fa9e4066Sahrens * else we default from the dmu buffer. 394fa9e4066Sahrens * 395fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 396fa9e4066Sahrens * the file is memory mapped. 397fa9e4066Sahrens */ 398fa9e4066Sahrens static int 399feb08c6bSbillm mappedread(vnode_t *vp, int nbytes, uio_t *uio) 400fa9e4066Sahrens { 401feb08c6bSbillm znode_t *zp = VTOZ(vp); 402feb08c6bSbillm objset_t *os = zp->z_zfsvfs->z_os; 403feb08c6bSbillm int64_t start, off; 404fa9e4066Sahrens int len = nbytes; 405fa9e4066Sahrens int error = 0; 406fa9e4066Sahrens 407fa9e4066Sahrens start = uio->uio_loffset; 408fa9e4066Sahrens off = start & PAGEOFFSET; 409fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 410fa9e4066Sahrens page_t *pp; 411feb08c6bSbillm uint64_t bytes = MIN(PAGESIZE - off, len); 412fa9e4066Sahrens 413fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 414fa9e4066Sahrens caddr_t va; 415fa9e4066Sahrens 416*0fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 417fa9e4066Sahrens error = uiomove(va + off, bytes, UIO_READ, uio); 418*0fab61baSJonathan W Adams zfs_unmap_page(pp, va); 419fa9e4066Sahrens page_unlock(pp); 420fa9e4066Sahrens } else { 421feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, bytes); 422fa9e4066Sahrens } 423fa9e4066Sahrens len -= bytes; 424fa9e4066Sahrens off = 0; 425fa9e4066Sahrens if (error) 426fa9e4066Sahrens break; 427fa9e4066Sahrens } 428fa9e4066Sahrens return (error); 429fa9e4066Sahrens } 430fa9e4066Sahrens 431feb08c6bSbillm offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 432fa9e4066Sahrens 433fa9e4066Sahrens /* 434fa9e4066Sahrens * Read bytes from specified file into supplied buffer. 435fa9e4066Sahrens * 436fa9e4066Sahrens * IN: vp - vnode of file to be read from. 437fa9e4066Sahrens * uio - structure supplying read location, range info, 438fa9e4066Sahrens * and return buffer. 439fa9e4066Sahrens * ioflag - SYNC flags; used to provide FRSYNC semantics. 440fa9e4066Sahrens * cr - credentials of caller. 441da6c28aaSamw * ct - caller context 442fa9e4066Sahrens * 443fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 444fa9e4066Sahrens * 445fa9e4066Sahrens * RETURN: 0 if success 446fa9e4066Sahrens * error code if failure 447fa9e4066Sahrens * 448fa9e4066Sahrens * Side Effects: 449fa9e4066Sahrens * vp - atime updated if byte count > 0 450fa9e4066Sahrens */ 451fa9e4066Sahrens /* ARGSUSED */ 452fa9e4066Sahrens static int 453fa9e4066Sahrens zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 454fa9e4066Sahrens { 455fa9e4066Sahrens znode_t *zp = VTOZ(vp); 456fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 457f18faf3fSek objset_t *os; 458feb08c6bSbillm ssize_t n, nbytes; 459feb08c6bSbillm int error; 460104e2ed7Sperrin rl_t *rl; 461fa9e4066Sahrens 4623cb34c60Sahrens ZFS_ENTER(zfsvfs); 4633cb34c60Sahrens ZFS_VERIFY_ZP(zp); 464f18faf3fSek os = zfsvfs->z_os; 465fa9e4066Sahrens 4660616c50eSmarks if (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) { 4670616c50eSmarks ZFS_EXIT(zfsvfs); 4680616c50eSmarks return (EACCES); 4690616c50eSmarks } 4700616c50eSmarks 471fa9e4066Sahrens /* 472fa9e4066Sahrens * Validate file offset 473fa9e4066Sahrens */ 474fa9e4066Sahrens if (uio->uio_loffset < (offset_t)0) { 475fa9e4066Sahrens ZFS_EXIT(zfsvfs); 476fa9e4066Sahrens return (EINVAL); 477fa9e4066Sahrens } 478fa9e4066Sahrens 479fa9e4066Sahrens /* 480fa9e4066Sahrens * Fasttrack empty reads 481fa9e4066Sahrens */ 482fa9e4066Sahrens if (uio->uio_resid == 0) { 483fa9e4066Sahrens ZFS_EXIT(zfsvfs); 484fa9e4066Sahrens return (0); 485fa9e4066Sahrens } 486fa9e4066Sahrens 487fa9e4066Sahrens /* 488104e2ed7Sperrin * Check for mandatory locks 489fa9e4066Sahrens */ 490fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode)) { 491fa9e4066Sahrens if (error = chklock(vp, FREAD, 492fa9e4066Sahrens uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 493fa9e4066Sahrens ZFS_EXIT(zfsvfs); 494fa9e4066Sahrens return (error); 495fa9e4066Sahrens } 496fa9e4066Sahrens } 497fa9e4066Sahrens 498fa9e4066Sahrens /* 499fa9e4066Sahrens * If we're in FRSYNC mode, sync out this znode before reading it. 500fa9e4066Sahrens */ 501b19a79ecSperrin if (ioflag & FRSYNC) 502b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 503fa9e4066Sahrens 504fa9e4066Sahrens /* 505104e2ed7Sperrin * Lock the range against changes. 506fa9e4066Sahrens */ 507104e2ed7Sperrin rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER); 508104e2ed7Sperrin 509fa9e4066Sahrens /* 510fa9e4066Sahrens * If we are reading past end-of-file we can skip 511fa9e4066Sahrens * to the end; but we might still need to set atime. 512fa9e4066Sahrens */ 513fa9e4066Sahrens if (uio->uio_loffset >= zp->z_phys->zp_size) { 514fa9e4066Sahrens error = 0; 515fa9e4066Sahrens goto out; 516fa9e4066Sahrens } 517fa9e4066Sahrens 518feb08c6bSbillm ASSERT(uio->uio_loffset < zp->z_phys->zp_size); 519feb08c6bSbillm n = MIN(uio->uio_resid, zp->z_phys->zp_size - uio->uio_loffset); 520feb08c6bSbillm 521feb08c6bSbillm while (n > 0) { 522feb08c6bSbillm nbytes = MIN(n, zfs_read_chunk_size - 523feb08c6bSbillm P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); 524fa9e4066Sahrens 525feb08c6bSbillm if (vn_has_cached_data(vp)) 526feb08c6bSbillm error = mappedread(vp, nbytes, uio); 527feb08c6bSbillm else 528feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, nbytes); 529b87f3af3Sperrin if (error) { 530b87f3af3Sperrin /* convert checksum errors into IO errors */ 531b87f3af3Sperrin if (error == ECKSUM) 532b87f3af3Sperrin error = EIO; 533feb08c6bSbillm break; 534b87f3af3Sperrin } 535fa9e4066Sahrens 536feb08c6bSbillm n -= nbytes; 537fa9e4066Sahrens } 538feb08c6bSbillm 539fa9e4066Sahrens out: 540c5c6ffa0Smaybee zfs_range_unlock(rl); 541fa9e4066Sahrens 542fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 543fa9e4066Sahrens ZFS_EXIT(zfsvfs); 544fa9e4066Sahrens return (error); 545fa9e4066Sahrens } 546fa9e4066Sahrens 547fa9e4066Sahrens /* 548fa9e4066Sahrens * Fault in the pages of the first n bytes specified by the uio structure. 549fa9e4066Sahrens * 1 byte in each page is touched and the uio struct is unmodified. 550fa9e4066Sahrens * Any error will exit this routine as this is only a best 551fa9e4066Sahrens * attempt to get the pages resident. This is a copy of ufs_trans_touch(). 552fa9e4066Sahrens */ 553fa9e4066Sahrens static void 554fa9e4066Sahrens zfs_prefault_write(ssize_t n, struct uio *uio) 555fa9e4066Sahrens { 556fa9e4066Sahrens struct iovec *iov; 557fa9e4066Sahrens ulong_t cnt, incr; 558fa9e4066Sahrens caddr_t p; 559fa9e4066Sahrens uint8_t tmp; 560fa9e4066Sahrens 561fa9e4066Sahrens iov = uio->uio_iov; 562fa9e4066Sahrens 563fa9e4066Sahrens while (n) { 564fa9e4066Sahrens cnt = MIN(iov->iov_len, n); 565fa9e4066Sahrens if (cnt == 0) { 566fa9e4066Sahrens /* empty iov entry */ 567fa9e4066Sahrens iov++; 568fa9e4066Sahrens continue; 569fa9e4066Sahrens } 570fa9e4066Sahrens n -= cnt; 571fa9e4066Sahrens /* 572fa9e4066Sahrens * touch each page in this segment. 573fa9e4066Sahrens */ 574fa9e4066Sahrens p = iov->iov_base; 575fa9e4066Sahrens while (cnt) { 576fa9e4066Sahrens switch (uio->uio_segflg) { 577fa9e4066Sahrens case UIO_USERSPACE: 578fa9e4066Sahrens case UIO_USERISPACE: 579fa9e4066Sahrens if (fuword8(p, &tmp)) 580fa9e4066Sahrens return; 581fa9e4066Sahrens break; 582fa9e4066Sahrens case UIO_SYSSPACE: 583fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 584fa9e4066Sahrens return; 585fa9e4066Sahrens break; 586fa9e4066Sahrens } 587fa9e4066Sahrens incr = MIN(cnt, PAGESIZE); 588fa9e4066Sahrens p += incr; 589fa9e4066Sahrens cnt -= incr; 590fa9e4066Sahrens } 591fa9e4066Sahrens /* 592fa9e4066Sahrens * touch the last byte in case it straddles a page. 593fa9e4066Sahrens */ 594fa9e4066Sahrens p--; 595fa9e4066Sahrens switch (uio->uio_segflg) { 596fa9e4066Sahrens case UIO_USERSPACE: 597fa9e4066Sahrens case UIO_USERISPACE: 598fa9e4066Sahrens if (fuword8(p, &tmp)) 599fa9e4066Sahrens return; 600fa9e4066Sahrens break; 601fa9e4066Sahrens case UIO_SYSSPACE: 602fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 603fa9e4066Sahrens return; 604fa9e4066Sahrens break; 605fa9e4066Sahrens } 606fa9e4066Sahrens iov++; 607fa9e4066Sahrens } 608fa9e4066Sahrens } 609fa9e4066Sahrens 610fa9e4066Sahrens /* 611fa9e4066Sahrens * Write the bytes to a file. 612fa9e4066Sahrens * 613fa9e4066Sahrens * IN: vp - vnode of file to be written to. 614fa9e4066Sahrens * uio - structure supplying write location, range info, 615fa9e4066Sahrens * and data buffer. 616fa9e4066Sahrens * ioflag - FAPPEND flag set if in append mode. 617fa9e4066Sahrens * cr - credentials of caller. 618da6c28aaSamw * ct - caller context (NFS/CIFS fem monitor only) 619fa9e4066Sahrens * 620fa9e4066Sahrens * OUT: uio - updated offset and range. 621fa9e4066Sahrens * 622fa9e4066Sahrens * RETURN: 0 if success 623fa9e4066Sahrens * error code if failure 624fa9e4066Sahrens * 625fa9e4066Sahrens * Timestamps: 626fa9e4066Sahrens * vp - ctime|mtime updated if byte count > 0 627fa9e4066Sahrens */ 628fa9e4066Sahrens /* ARGSUSED */ 629fa9e4066Sahrens static int 630fa9e4066Sahrens zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 631fa9e4066Sahrens { 632fa9e4066Sahrens znode_t *zp = VTOZ(vp); 633fa9e4066Sahrens rlim64_t limit = uio->uio_llimit; 634fa9e4066Sahrens ssize_t start_resid = uio->uio_resid; 635fa9e4066Sahrens ssize_t tx_bytes; 636fa9e4066Sahrens uint64_t end_size; 637fa9e4066Sahrens dmu_tx_t *tx; 638fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 639f18faf3fSek zilog_t *zilog; 640fa9e4066Sahrens offset_t woff; 641fa9e4066Sahrens ssize_t n, nbytes; 642104e2ed7Sperrin rl_t *rl; 643fa9e4066Sahrens int max_blksz = zfsvfs->z_max_blksz; 644c09193bfSmarks uint64_t pflags; 645104e2ed7Sperrin int error; 646fa9e4066Sahrens 647fa9e4066Sahrens /* 648fa9e4066Sahrens * Fasttrack empty write 649fa9e4066Sahrens */ 650104e2ed7Sperrin n = start_resid; 651fa9e4066Sahrens if (n == 0) 652fa9e4066Sahrens return (0); 653fa9e4066Sahrens 654104e2ed7Sperrin if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 655104e2ed7Sperrin limit = MAXOFFSET_T; 656104e2ed7Sperrin 6573cb34c60Sahrens ZFS_ENTER(zfsvfs); 6583cb34c60Sahrens ZFS_VERIFY_ZP(zp); 659c09193bfSmarks 660c09193bfSmarks /* 661c09193bfSmarks * If immutable or not appending then return EPERM 662c09193bfSmarks */ 663c09193bfSmarks pflags = zp->z_phys->zp_flags; 664c09193bfSmarks if ((pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) || 665c09193bfSmarks ((pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) && 666c09193bfSmarks (uio->uio_loffset < zp->z_phys->zp_size))) { 667c09193bfSmarks ZFS_EXIT(zfsvfs); 668c09193bfSmarks return (EPERM); 669c09193bfSmarks } 670c09193bfSmarks 671f18faf3fSek zilog = zfsvfs->z_log; 672fa9e4066Sahrens 673fa9e4066Sahrens /* 674c5c6ffa0Smaybee * Pre-fault the pages to ensure slow (eg NFS) pages 675104e2ed7Sperrin * don't hold up txg. 676fa9e4066Sahrens */ 677c5c6ffa0Smaybee zfs_prefault_write(n, uio); 678fa9e4066Sahrens 679fa9e4066Sahrens /* 680fa9e4066Sahrens * If in append mode, set the io offset pointer to eof. 681fa9e4066Sahrens */ 682104e2ed7Sperrin if (ioflag & FAPPEND) { 683104e2ed7Sperrin /* 684104e2ed7Sperrin * Range lock for a file append: 685104e2ed7Sperrin * The value for the start of range will be determined by 686104e2ed7Sperrin * zfs_range_lock() (to guarantee append semantics). 687104e2ed7Sperrin * If this write will cause the block size to increase, 688104e2ed7Sperrin * zfs_range_lock() will lock the entire file, so we must 689104e2ed7Sperrin * later reduce the range after we grow the block size. 690104e2ed7Sperrin */ 691104e2ed7Sperrin rl = zfs_range_lock(zp, 0, n, RL_APPEND); 692104e2ed7Sperrin if (rl->r_len == UINT64_MAX) { 693104e2ed7Sperrin /* overlocked, zp_size can't change */ 694104e2ed7Sperrin woff = uio->uio_loffset = zp->z_phys->zp_size; 695104e2ed7Sperrin } else { 696104e2ed7Sperrin woff = uio->uio_loffset = rl->r_off; 697104e2ed7Sperrin } 698fa9e4066Sahrens } else { 699fa9e4066Sahrens woff = uio->uio_loffset; 700fa9e4066Sahrens /* 701fa9e4066Sahrens * Validate file offset 702fa9e4066Sahrens */ 703fa9e4066Sahrens if (woff < 0) { 704fa9e4066Sahrens ZFS_EXIT(zfsvfs); 705fa9e4066Sahrens return (EINVAL); 706fa9e4066Sahrens } 707fa9e4066Sahrens 708fa9e4066Sahrens /* 709104e2ed7Sperrin * If we need to grow the block size then zfs_range_lock() 710104e2ed7Sperrin * will lock a wider range than we request here. 711104e2ed7Sperrin * Later after growing the block size we reduce the range. 712fa9e4066Sahrens */ 713104e2ed7Sperrin rl = zfs_range_lock(zp, woff, n, RL_WRITER); 714fa9e4066Sahrens } 715fa9e4066Sahrens 716fa9e4066Sahrens if (woff >= limit) { 717feb08c6bSbillm zfs_range_unlock(rl); 718feb08c6bSbillm ZFS_EXIT(zfsvfs); 719feb08c6bSbillm return (EFBIG); 720fa9e4066Sahrens } 721fa9e4066Sahrens 722fa9e4066Sahrens if ((woff + n) > limit || woff > (limit - n)) 723fa9e4066Sahrens n = limit - woff; 724fa9e4066Sahrens 725fa9e4066Sahrens /* 726104e2ed7Sperrin * Check for mandatory locks 727fa9e4066Sahrens */ 728fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode) && 729feb08c6bSbillm (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 730feb08c6bSbillm zfs_range_unlock(rl); 731feb08c6bSbillm ZFS_EXIT(zfsvfs); 732feb08c6bSbillm return (error); 733fa9e4066Sahrens } 734feb08c6bSbillm end_size = MAX(zp->z_phys->zp_size, woff + n); 735fa9e4066Sahrens 736104e2ed7Sperrin /* 737feb08c6bSbillm * Write the file in reasonable size chunks. Each chunk is written 738feb08c6bSbillm * in a separate transaction; this keeps the intent log records small 739feb08c6bSbillm * and allows us to do more fine-grained space accounting. 740104e2ed7Sperrin */ 741feb08c6bSbillm while (n > 0) { 742feb08c6bSbillm /* 743feb08c6bSbillm * Start a transaction. 744feb08c6bSbillm */ 745feb08c6bSbillm woff = uio->uio_loffset; 746feb08c6bSbillm tx = dmu_tx_create(zfsvfs->z_os); 747feb08c6bSbillm dmu_tx_hold_bonus(tx, zp->z_id); 748feb08c6bSbillm dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 749feb08c6bSbillm error = dmu_tx_assign(tx, zfsvfs->z_assign); 750feb08c6bSbillm if (error) { 751feb08c6bSbillm if (error == ERESTART && 752feb08c6bSbillm zfsvfs->z_assign == TXG_NOWAIT) { 753feb08c6bSbillm dmu_tx_wait(tx); 754feb08c6bSbillm dmu_tx_abort(tx); 755feb08c6bSbillm continue; 756feb08c6bSbillm } 757feb08c6bSbillm dmu_tx_abort(tx); 758feb08c6bSbillm break; 759feb08c6bSbillm } 760104e2ed7Sperrin 761feb08c6bSbillm /* 762feb08c6bSbillm * If zfs_range_lock() over-locked we grow the blocksize 763feb08c6bSbillm * and then reduce the lock range. This will only happen 764feb08c6bSbillm * on the first iteration since zfs_range_reduce() will 765feb08c6bSbillm * shrink down r_len to the appropriate size. 766feb08c6bSbillm */ 767feb08c6bSbillm if (rl->r_len == UINT64_MAX) { 768feb08c6bSbillm uint64_t new_blksz; 769feb08c6bSbillm 770feb08c6bSbillm if (zp->z_blksz > max_blksz) { 771feb08c6bSbillm ASSERT(!ISP2(zp->z_blksz)); 772feb08c6bSbillm new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 773feb08c6bSbillm } else { 774feb08c6bSbillm new_blksz = MIN(end_size, max_blksz); 775feb08c6bSbillm } 776feb08c6bSbillm zfs_grow_blocksize(zp, new_blksz, tx); 777feb08c6bSbillm zfs_range_reduce(rl, woff, n); 778fa9e4066Sahrens } 779fa9e4066Sahrens 780fa9e4066Sahrens /* 781fa9e4066Sahrens * XXX - should we really limit each write to z_max_blksz? 782fa9e4066Sahrens * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 783fa9e4066Sahrens */ 784fa9e4066Sahrens nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 785fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_READER); 786fa9e4066Sahrens 787fa9e4066Sahrens tx_bytes = uio->uio_resid; 788fa9e4066Sahrens if (vn_has_cached_data(vp)) { 789fa9e4066Sahrens rw_exit(&zp->z_map_lock); 790feb08c6bSbillm error = mappedwrite(vp, nbytes, uio, tx); 791fa9e4066Sahrens } else { 792fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 793feb08c6bSbillm uio, nbytes, tx); 794fa9e4066Sahrens rw_exit(&zp->z_map_lock); 795fa9e4066Sahrens } 796fa9e4066Sahrens tx_bytes -= uio->uio_resid; 797fa9e4066Sahrens 798feb08c6bSbillm /* 799feb08c6bSbillm * If we made no progress, we're done. If we made even 800feb08c6bSbillm * partial progress, update the znode and ZIL accordingly. 801feb08c6bSbillm */ 802feb08c6bSbillm if (tx_bytes == 0) { 803af2c4821Smaybee dmu_tx_commit(tx); 804feb08c6bSbillm ASSERT(error != 0); 805fa9e4066Sahrens break; 806fa9e4066Sahrens } 807fa9e4066Sahrens 808169cdae2Smarks /* 809169cdae2Smarks * Clear Set-UID/Set-GID bits on successful write if not 810169cdae2Smarks * privileged and at least one of the excute bits is set. 811169cdae2Smarks * 812169cdae2Smarks * It would be nice to to this after all writes have 813169cdae2Smarks * been done, but that would still expose the ISUID/ISGID 814169cdae2Smarks * to another app after the partial write is committed. 815da6c28aaSamw * 816da6c28aaSamw * Note: we don't call zfs_fuid_map_id() here because 817da6c28aaSamw * user 0 is not an ephemeral uid. 818169cdae2Smarks */ 819169cdae2Smarks mutex_enter(&zp->z_acl_lock); 820169cdae2Smarks if ((zp->z_phys->zp_mode & (S_IXUSR | (S_IXUSR >> 3) | 821169cdae2Smarks (S_IXUSR >> 6))) != 0 && 822169cdae2Smarks (zp->z_phys->zp_mode & (S_ISUID | S_ISGID)) != 0 && 823169cdae2Smarks secpolicy_vnode_setid_retain(cr, 824169cdae2Smarks (zp->z_phys->zp_mode & S_ISUID) != 0 && 825169cdae2Smarks zp->z_phys->zp_uid == 0) != 0) { 826ecb72030Sperrin zp->z_phys->zp_mode &= ~(S_ISUID | S_ISGID); 827169cdae2Smarks } 828169cdae2Smarks mutex_exit(&zp->z_acl_lock); 829169cdae2Smarks 830fa9e4066Sahrens /* 831feb08c6bSbillm * Update time stamp. NOTE: This marks the bonus buffer as 832feb08c6bSbillm * dirty, so we don't have to do it again for zp_size. 833fa9e4066Sahrens */ 834fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 835fa9e4066Sahrens 836fa9e4066Sahrens /* 837feb08c6bSbillm * Update the file size (zp_size) if it has changed; 838feb08c6bSbillm * account for possible concurrent updates. 839fa9e4066Sahrens */ 840feb08c6bSbillm while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) 841fa9e4066Sahrens (void) atomic_cas_64(&zp->z_phys->zp_size, end_size, 842fa9e4066Sahrens uio->uio_loffset); 843feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 844feb08c6bSbillm dmu_tx_commit(tx); 845fa9e4066Sahrens 846feb08c6bSbillm if (error != 0) 847feb08c6bSbillm break; 848feb08c6bSbillm ASSERT(tx_bytes == nbytes); 849feb08c6bSbillm n -= nbytes; 850feb08c6bSbillm } 851fa9e4066Sahrens 852c5c6ffa0Smaybee zfs_range_unlock(rl); 853fa9e4066Sahrens 854fa9e4066Sahrens /* 855fa9e4066Sahrens * If we're in replay mode, or we made no progress, return error. 856fa9e4066Sahrens * Otherwise, it's at least a partial write, so it's successful. 857fa9e4066Sahrens */ 858fa9e4066Sahrens if (zfsvfs->z_assign >= TXG_INITIAL || uio->uio_resid == start_resid) { 859fa9e4066Sahrens ZFS_EXIT(zfsvfs); 860fa9e4066Sahrens return (error); 861fa9e4066Sahrens } 862fa9e4066Sahrens 863b19a79ecSperrin if (ioflag & (FSYNC | FDSYNC)) 864b19a79ecSperrin zil_commit(zilog, zp->z_last_itx, zp->z_id); 865fa9e4066Sahrens 866fa9e4066Sahrens ZFS_EXIT(zfsvfs); 867fa9e4066Sahrens return (0); 868fa9e4066Sahrens } 869fa9e4066Sahrens 870c5c6ffa0Smaybee void 87167bd71c6Sperrin zfs_get_done(dmu_buf_t *db, void *vzgd) 872c5c6ffa0Smaybee { 87367bd71c6Sperrin zgd_t *zgd = (zgd_t *)vzgd; 87467bd71c6Sperrin rl_t *rl = zgd->zgd_rl; 875c5c6ffa0Smaybee vnode_t *vp = ZTOV(rl->r_zp); 876c5c6ffa0Smaybee 87767bd71c6Sperrin dmu_buf_rele(db, vzgd); 878c5c6ffa0Smaybee zfs_range_unlock(rl); 879c5c6ffa0Smaybee VN_RELE(vp); 88017f17c2dSbonwick zil_add_block(zgd->zgd_zilog, zgd->zgd_bp); 88167bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 882c5c6ffa0Smaybee } 883c5c6ffa0Smaybee 884fa9e4066Sahrens /* 885fa9e4066Sahrens * Get data to generate a TX_WRITE intent log record. 886fa9e4066Sahrens */ 887fa9e4066Sahrens int 888c5c6ffa0Smaybee zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) 889fa9e4066Sahrens { 890fa9e4066Sahrens zfsvfs_t *zfsvfs = arg; 891fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 892fa9e4066Sahrens znode_t *zp; 893fa9e4066Sahrens uint64_t off = lr->lr_offset; 894c5c6ffa0Smaybee dmu_buf_t *db; 895104e2ed7Sperrin rl_t *rl; 89667bd71c6Sperrin zgd_t *zgd; 897feb08c6bSbillm int dlen = lr->lr_length; /* length of user data */ 898fa9e4066Sahrens int error = 0; 899fa9e4066Sahrens 90067bd71c6Sperrin ASSERT(zio); 901fa9e4066Sahrens ASSERT(dlen != 0); 902fa9e4066Sahrens 903fa9e4066Sahrens /* 904104e2ed7Sperrin * Nothing to do if the file has been removed 905fa9e4066Sahrens */ 906fa9e4066Sahrens if (zfs_zget(zfsvfs, lr->lr_foid, &zp) != 0) 907fa9e4066Sahrens return (ENOENT); 908893a6d32Sahrens if (zp->z_unlinked) { 909fa9e4066Sahrens VN_RELE(ZTOV(zp)); 910fa9e4066Sahrens return (ENOENT); 911fa9e4066Sahrens } 912fa9e4066Sahrens 913fa9e4066Sahrens /* 914fa9e4066Sahrens * Write records come in two flavors: immediate and indirect. 915fa9e4066Sahrens * For small writes it's cheaper to store the data with the 916fa9e4066Sahrens * log record (immediate); for large writes it's cheaper to 917fa9e4066Sahrens * sync the data and get a pointer to it (indirect) so that 918fa9e4066Sahrens * we don't have to write the data twice. 919fa9e4066Sahrens */ 920104e2ed7Sperrin if (buf != NULL) { /* immediate write */ 921104e2ed7Sperrin rl = zfs_range_lock(zp, off, dlen, RL_READER); 922104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 923104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 924104e2ed7Sperrin error = ENOENT; 925104e2ed7Sperrin goto out; 926104e2ed7Sperrin } 92710d957caSmaybee VERIFY(0 == dmu_read(os, lr->lr_foid, off, dlen, buf)); 928104e2ed7Sperrin } else { /* indirect write */ 929104e2ed7Sperrin uint64_t boff; /* block starting offset */ 930104e2ed7Sperrin 931fa9e4066Sahrens /* 932104e2ed7Sperrin * Have to lock the whole block to ensure when it's 933104e2ed7Sperrin * written out and it's checksum is being calculated 934104e2ed7Sperrin * that no one can change the data. We need to re-check 935104e2ed7Sperrin * blocksize after we get the lock in case it's changed! 936fa9e4066Sahrens */ 937104e2ed7Sperrin for (;;) { 9385263255cSperrin if (ISP2(zp->z_blksz)) { 9395263255cSperrin boff = P2ALIGN_TYPED(off, zp->z_blksz, 9405263255cSperrin uint64_t); 9415263255cSperrin } else { 9425263255cSperrin boff = 0; 9435263255cSperrin } 944104e2ed7Sperrin dlen = zp->z_blksz; 945104e2ed7Sperrin rl = zfs_range_lock(zp, boff, dlen, RL_READER); 946104e2ed7Sperrin if (zp->z_blksz == dlen) 947104e2ed7Sperrin break; 948c5c6ffa0Smaybee zfs_range_unlock(rl); 949104e2ed7Sperrin } 950104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 951104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 952104e2ed7Sperrin error = ENOENT; 953104e2ed7Sperrin goto out; 954104e2ed7Sperrin } 95567bd71c6Sperrin zgd = (zgd_t *)kmem_alloc(sizeof (zgd_t), KM_SLEEP); 95667bd71c6Sperrin zgd->zgd_rl = rl; 95767bd71c6Sperrin zgd->zgd_zilog = zfsvfs->z_log; 95867bd71c6Sperrin zgd->zgd_bp = &lr->lr_blkptr; 95967bd71c6Sperrin VERIFY(0 == dmu_buf_hold(os, lr->lr_foid, boff, zgd, &db)); 960c5c6ffa0Smaybee ASSERT(boff == db->db_offset); 961c5c6ffa0Smaybee lr->lr_blkoff = off - boff; 962c5c6ffa0Smaybee error = dmu_sync(zio, db, &lr->lr_blkptr, 96367bd71c6Sperrin lr->lr_common.lrc_txg, zfs_get_done, zgd); 964f4d2e9e6Smaybee ASSERT((error && error != EINPROGRESS) || 965f4d2e9e6Smaybee lr->lr_length <= zp->z_blksz); 96617f17c2dSbonwick if (error == 0) 96717f17c2dSbonwick zil_add_block(zfsvfs->z_log, &lr->lr_blkptr); 968c5c6ffa0Smaybee /* 969c5c6ffa0Smaybee * If we get EINPROGRESS, then we need to wait for a 970c5c6ffa0Smaybee * write IO initiated by dmu_sync() to complete before 971b19a79ecSperrin * we can release this dbuf. We will finish everything 972c5c6ffa0Smaybee * up in the zfs_get_done() callback. 973c5c6ffa0Smaybee */ 974c5c6ffa0Smaybee if (error == EINPROGRESS) 975c5c6ffa0Smaybee return (0); 97667bd71c6Sperrin dmu_buf_rele(db, zgd); 97767bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 978fa9e4066Sahrens } 979104e2ed7Sperrin out: 980c5c6ffa0Smaybee zfs_range_unlock(rl); 981fa9e4066Sahrens VN_RELE(ZTOV(zp)); 982fa9e4066Sahrens return (error); 983fa9e4066Sahrens } 984fa9e4066Sahrens 985fa9e4066Sahrens /*ARGSUSED*/ 986fa9e4066Sahrens static int 987da6c28aaSamw zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr, 988da6c28aaSamw caller_context_t *ct) 989fa9e4066Sahrens { 990fa9e4066Sahrens znode_t *zp = VTOZ(vp); 991fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 992fa9e4066Sahrens int error; 993fa9e4066Sahrens 9943cb34c60Sahrens ZFS_ENTER(zfsvfs); 9953cb34c60Sahrens ZFS_VERIFY_ZP(zp); 996da6c28aaSamw 997da6c28aaSamw if (flag & V_ACE_MASK) 998da6c28aaSamw error = zfs_zaccess(zp, mode, flag, B_FALSE, cr); 999da6c28aaSamw else 1000da6c28aaSamw error = zfs_zaccess_rwx(zp, mode, flag, cr); 1001da6c28aaSamw 1002fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1003fa9e4066Sahrens return (error); 1004fa9e4066Sahrens } 1005fa9e4066Sahrens 1006fa9e4066Sahrens /* 1007fa9e4066Sahrens * Lookup an entry in a directory, or an extended attribute directory. 1008fa9e4066Sahrens * If it exists, return a held vnode reference for it. 1009fa9e4066Sahrens * 1010fa9e4066Sahrens * IN: dvp - vnode of directory to search. 1011fa9e4066Sahrens * nm - name of entry to lookup. 1012fa9e4066Sahrens * pnp - full pathname to lookup [UNUSED]. 1013fa9e4066Sahrens * flags - LOOKUP_XATTR set if looking for an attribute. 1014fa9e4066Sahrens * rdir - root directory vnode [UNUSED]. 1015fa9e4066Sahrens * cr - credentials of caller. 1016da6c28aaSamw * ct - caller context 1017da6c28aaSamw * direntflags - directory lookup flags 1018da6c28aaSamw * realpnp - returned pathname. 1019fa9e4066Sahrens * 1020fa9e4066Sahrens * OUT: vpp - vnode of located entry, NULL if not found. 1021fa9e4066Sahrens * 1022fa9e4066Sahrens * RETURN: 0 if success 1023fa9e4066Sahrens * error code if failure 1024fa9e4066Sahrens * 1025fa9e4066Sahrens * Timestamps: 1026fa9e4066Sahrens * NA 1027fa9e4066Sahrens */ 1028fa9e4066Sahrens /* ARGSUSED */ 1029fa9e4066Sahrens static int 1030fa9e4066Sahrens zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 1031da6c28aaSamw int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, 1032da6c28aaSamw int *direntflags, pathname_t *realpnp) 1033fa9e4066Sahrens { 1034fa9e4066Sahrens znode_t *zdp = VTOZ(dvp); 1035fa9e4066Sahrens zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 1036fa9e4066Sahrens int error; 1037fa9e4066Sahrens 10383cb34c60Sahrens ZFS_ENTER(zfsvfs); 10393cb34c60Sahrens ZFS_VERIFY_ZP(zdp); 1040fa9e4066Sahrens 1041fa9e4066Sahrens *vpp = NULL; 1042fa9e4066Sahrens 1043fa9e4066Sahrens if (flags & LOOKUP_XATTR) { 10447b55fa8eSck /* 10457b55fa8eSck * If the xattr property is off, refuse the lookup request. 10467b55fa8eSck */ 10477b55fa8eSck if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 10487b55fa8eSck ZFS_EXIT(zfsvfs); 10497b55fa8eSck return (EINVAL); 10507b55fa8eSck } 10517b55fa8eSck 1052fa9e4066Sahrens /* 1053fa9e4066Sahrens * We don't allow recursive attributes.. 1054fa9e4066Sahrens * Maybe someday we will. 1055fa9e4066Sahrens */ 1056fa9e4066Sahrens if (zdp->z_phys->zp_flags & ZFS_XATTR) { 1057fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1058fa9e4066Sahrens return (EINVAL); 1059fa9e4066Sahrens } 1060fa9e4066Sahrens 10613f063a9dSck if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 1062fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1063fa9e4066Sahrens return (error); 1064fa9e4066Sahrens } 1065fa9e4066Sahrens 1066fa9e4066Sahrens /* 1067fa9e4066Sahrens * Do we have permission to get into attribute directory? 1068fa9e4066Sahrens */ 1069fa9e4066Sahrens 1070da6c28aaSamw if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0, 1071da6c28aaSamw B_FALSE, cr)) { 1072fa9e4066Sahrens VN_RELE(*vpp); 1073da6c28aaSamw *vpp = NULL; 1074fa9e4066Sahrens } 1075fa9e4066Sahrens 1076fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1077fa9e4066Sahrens return (error); 1078fa9e4066Sahrens } 1079fa9e4066Sahrens 10800f2dc02eSek if (dvp->v_type != VDIR) { 10810f2dc02eSek ZFS_EXIT(zfsvfs); 1082736b9155Smarks return (ENOTDIR); 10830f2dc02eSek } 1084736b9155Smarks 1085fa9e4066Sahrens /* 1086fa9e4066Sahrens * Check accessibility of directory. 1087fa9e4066Sahrens */ 1088fa9e4066Sahrens 1089da6c28aaSamw if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) { 1090fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1091fa9e4066Sahrens return (error); 1092fa9e4066Sahrens } 1093fa9e4066Sahrens 1094de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), 1095da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1096da6c28aaSamw ZFS_EXIT(zfsvfs); 1097da6c28aaSamw return (EILSEQ); 1098da6c28aaSamw } 1099fa9e4066Sahrens 1100da6c28aaSamw error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp); 1101da6c28aaSamw if (error == 0) { 1102fa9e4066Sahrens /* 1103fa9e4066Sahrens * Convert device special files 1104fa9e4066Sahrens */ 1105fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1106fa9e4066Sahrens vnode_t *svp; 1107fa9e4066Sahrens 1108fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1109fa9e4066Sahrens VN_RELE(*vpp); 1110fa9e4066Sahrens if (svp == NULL) 1111fa9e4066Sahrens error = ENOSYS; 1112fa9e4066Sahrens else 1113fa9e4066Sahrens *vpp = svp; 1114fa9e4066Sahrens } 1115fa9e4066Sahrens } 1116fa9e4066Sahrens 1117fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1118fa9e4066Sahrens return (error); 1119fa9e4066Sahrens } 1120fa9e4066Sahrens 1121fa9e4066Sahrens /* 1122fa9e4066Sahrens * Attempt to create a new entry in a directory. If the entry 1123fa9e4066Sahrens * already exists, truncate the file if permissible, else return 1124fa9e4066Sahrens * an error. Return the vp of the created or trunc'd file. 1125fa9e4066Sahrens * 1126fa9e4066Sahrens * IN: dvp - vnode of directory to put new file entry in. 1127fa9e4066Sahrens * name - name of new file entry. 1128fa9e4066Sahrens * vap - attributes of new file. 1129fa9e4066Sahrens * excl - flag indicating exclusive or non-exclusive mode. 1130fa9e4066Sahrens * mode - mode to open file with. 1131fa9e4066Sahrens * cr - credentials of caller. 1132fa9e4066Sahrens * flag - large file flag [UNUSED]. 1133da6c28aaSamw * ct - caller context 1134da6c28aaSamw * vsecp - ACL to be set 1135fa9e4066Sahrens * 1136fa9e4066Sahrens * OUT: vpp - vnode of created or trunc'd entry. 1137fa9e4066Sahrens * 1138fa9e4066Sahrens * RETURN: 0 if success 1139fa9e4066Sahrens * error code if failure 1140fa9e4066Sahrens * 1141fa9e4066Sahrens * Timestamps: 1142fa9e4066Sahrens * dvp - ctime|mtime updated if new entry created 1143fa9e4066Sahrens * vp - ctime|mtime always, atime if new 1144fa9e4066Sahrens */ 1145da6c28aaSamw 1146fa9e4066Sahrens /* ARGSUSED */ 1147fa9e4066Sahrens static int 1148fa9e4066Sahrens zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, 1149da6c28aaSamw int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct, 1150da6c28aaSamw vsecattr_t *vsecp) 1151fa9e4066Sahrens { 1152fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1153fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1154f18faf3fSek zilog_t *zilog; 1155f18faf3fSek objset_t *os; 1156fa9e4066Sahrens zfs_dirlock_t *dl; 1157fa9e4066Sahrens dmu_tx_t *tx; 1158fa9e4066Sahrens int error; 1159da6c28aaSamw zfs_acl_t *aclp = NULL; 1160da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 1161da6c28aaSamw 1162da6c28aaSamw /* 1163da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1164da6c28aaSamw * make sure file system is at proper version 1165da6c28aaSamw */ 1166da6c28aaSamw 1167da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1168da6c28aaSamw (vsecp || (vap->va_mask & AT_XVATTR) || 1169da6c28aaSamw IS_EPHEMERAL(crgetuid(cr)) || IS_EPHEMERAL(crgetgid(cr)))) 1170da6c28aaSamw return (EINVAL); 1171fa9e4066Sahrens 11723cb34c60Sahrens ZFS_ENTER(zfsvfs); 11733cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1174f18faf3fSek os = zfsvfs->z_os; 1175f18faf3fSek zilog = zfsvfs->z_log; 1176fa9e4066Sahrens 1177de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 1178da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1179da6c28aaSamw ZFS_EXIT(zfsvfs); 1180da6c28aaSamw return (EILSEQ); 1181da6c28aaSamw } 1182da6c28aaSamw 1183da6c28aaSamw if (vap->va_mask & AT_XVATTR) { 1184da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1185da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1186da6c28aaSamw ZFS_EXIT(zfsvfs); 1187da6c28aaSamw return (error); 1188da6c28aaSamw } 1189da6c28aaSamw } 1190fa9e4066Sahrens top: 1191fa9e4066Sahrens *vpp = NULL; 1192fa9e4066Sahrens 1193fa9e4066Sahrens if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) 1194fa9e4066Sahrens vap->va_mode &= ~VSVTX; 1195fa9e4066Sahrens 1196fa9e4066Sahrens if (*name == '\0') { 1197fa9e4066Sahrens /* 1198fa9e4066Sahrens * Null component name refers to the directory itself. 1199fa9e4066Sahrens */ 1200fa9e4066Sahrens VN_HOLD(dvp); 1201fa9e4066Sahrens zp = dzp; 1202fa9e4066Sahrens dl = NULL; 1203fa9e4066Sahrens error = 0; 1204fa9e4066Sahrens } else { 1205fa9e4066Sahrens /* possible VN_HOLD(zp) */ 1206da6c28aaSamw int zflg = 0; 1207da6c28aaSamw 1208da6c28aaSamw if (flag & FIGNORECASE) 1209da6c28aaSamw zflg |= ZCILOOK; 1210da6c28aaSamw 1211da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1212da6c28aaSamw NULL, NULL); 1213da6c28aaSamw if (error) { 1214fa9e4066Sahrens if (strcmp(name, "..") == 0) 1215fa9e4066Sahrens error = EISDIR; 1216fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1217da6c28aaSamw if (aclp) 1218da6c28aaSamw zfs_acl_free(aclp); 1219da6c28aaSamw return (error); 1220da6c28aaSamw } 1221da6c28aaSamw } 1222da6c28aaSamw if (vsecp && aclp == NULL) { 1223da6c28aaSamw error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, &aclp); 1224da6c28aaSamw if (error) { 1225da6c28aaSamw ZFS_EXIT(zfsvfs); 1226da6c28aaSamw if (dl) 1227da6c28aaSamw zfs_dirent_unlock(dl); 1228fa9e4066Sahrens return (error); 1229fa9e4066Sahrens } 1230fa9e4066Sahrens } 1231fa9e4066Sahrens 1232fa9e4066Sahrens if (zp == NULL) { 1233da6c28aaSamw uint64_t txtype; 1234da6c28aaSamw 1235fa9e4066Sahrens /* 1236fa9e4066Sahrens * Create a new file object and update the directory 1237fa9e4066Sahrens * to reference it. 1238fa9e4066Sahrens */ 1239da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 1240fa9e4066Sahrens goto out; 1241fa9e4066Sahrens } 1242fa9e4066Sahrens 1243fa9e4066Sahrens /* 1244fa9e4066Sahrens * We only support the creation of regular files in 1245fa9e4066Sahrens * extended attribute directories. 1246fa9e4066Sahrens */ 1247fa9e4066Sahrens if ((dzp->z_phys->zp_flags & ZFS_XATTR) && 1248fa9e4066Sahrens (vap->va_type != VREG)) { 1249fa9e4066Sahrens error = EINVAL; 1250fa9e4066Sahrens goto out; 1251fa9e4066Sahrens } 1252fa9e4066Sahrens 1253fa9e4066Sahrens tx = dmu_tx_create(os); 1254fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 1255e0d35c44Smarks if ((aclp && aclp->z_has_fuids) || IS_EPHEMERAL(crgetuid(cr)) || 1256e0d35c44Smarks IS_EPHEMERAL(crgetgid(cr))) { 12574c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 12584c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 12594c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 12604c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 12614c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, 12624c841f60Smarks FALSE, NULL); 12634c841f60Smarks } else { 12644c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 12654c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 12664c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 12674c841f60Smarks } 1268da6c28aaSamw } 1269fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 1270ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 1271da6c28aaSamw if ((dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) || aclp) { 1272fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1273fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1274da6c28aaSamw } 1275fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1276fa9e4066Sahrens if (error) { 1277fa9e4066Sahrens zfs_dirent_unlock(dl); 1278fa9e4066Sahrens if (error == ERESTART && 1279fa9e4066Sahrens zfsvfs->z_assign == TXG_NOWAIT) { 12808a2f1b91Sahrens dmu_tx_wait(tx); 12818a2f1b91Sahrens dmu_tx_abort(tx); 1282fa9e4066Sahrens goto top; 1283fa9e4066Sahrens } 12848a2f1b91Sahrens dmu_tx_abort(tx); 1285fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1286da6c28aaSamw if (aclp) 1287da6c28aaSamw zfs_acl_free(aclp); 1288fa9e4066Sahrens return (error); 1289fa9e4066Sahrens } 12904ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, aclp, &fuidp); 1291fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1292da6c28aaSamw txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); 1293da6c28aaSamw if (flag & FIGNORECASE) 1294da6c28aaSamw txtype |= TX_CI; 1295da6c28aaSamw zfs_log_create(zilog, tx, txtype, dzp, zp, name, 1296da6c28aaSamw vsecp, fuidp, vap); 1297da6c28aaSamw if (fuidp) 1298da6c28aaSamw zfs_fuid_info_free(fuidp); 1299fa9e4066Sahrens dmu_tx_commit(tx); 1300fa9e4066Sahrens } else { 1301da6c28aaSamw int aflags = (flag & FAPPEND) ? V_APPEND : 0; 1302da6c28aaSamw 1303fa9e4066Sahrens /* 1304fa9e4066Sahrens * A directory entry already exists for this name. 1305fa9e4066Sahrens */ 1306fa9e4066Sahrens /* 1307fa9e4066Sahrens * Can't truncate an existing file if in exclusive mode. 1308fa9e4066Sahrens */ 1309fa9e4066Sahrens if (excl == EXCL) { 1310fa9e4066Sahrens error = EEXIST; 1311fa9e4066Sahrens goto out; 1312fa9e4066Sahrens } 1313fa9e4066Sahrens /* 1314fa9e4066Sahrens * Can't open a directory for writing. 1315fa9e4066Sahrens */ 1316fa9e4066Sahrens if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1317fa9e4066Sahrens error = EISDIR; 1318fa9e4066Sahrens goto out; 1319fa9e4066Sahrens } 1320fa9e4066Sahrens /* 1321fa9e4066Sahrens * Verify requested access to file. 1322fa9e4066Sahrens */ 1323da6c28aaSamw if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) { 1324fa9e4066Sahrens goto out; 1325fa9e4066Sahrens } 1326fa9e4066Sahrens 1327fa9e4066Sahrens mutex_enter(&dzp->z_lock); 1328fa9e4066Sahrens dzp->z_seq++; 1329fa9e4066Sahrens mutex_exit(&dzp->z_lock); 1330fa9e4066Sahrens 13315730cc9aSmaybee /* 13325730cc9aSmaybee * Truncate regular files if requested. 13335730cc9aSmaybee */ 13345730cc9aSmaybee if ((ZTOV(zp)->v_type == VREG) && 1335fa9e4066Sahrens (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 1336cdb0ab79Smaybee /* we can't hold any locks when calling zfs_freesp() */ 1337cdb0ab79Smaybee zfs_dirent_unlock(dl); 1338cdb0ab79Smaybee dl = NULL; 13395730cc9aSmaybee error = zfs_freesp(zp, 0, 0, mode, TRUE); 1340df2381bfSpraks if (error == 0) { 1341da6c28aaSamw vnevent_create(ZTOV(zp), ct); 1342df2381bfSpraks } 1343fa9e4066Sahrens } 1344fa9e4066Sahrens } 1345fa9e4066Sahrens out: 1346fa9e4066Sahrens 1347fa9e4066Sahrens if (dl) 1348fa9e4066Sahrens zfs_dirent_unlock(dl); 1349fa9e4066Sahrens 1350fa9e4066Sahrens if (error) { 1351fa9e4066Sahrens if (zp) 1352fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1353fa9e4066Sahrens } else { 1354fa9e4066Sahrens *vpp = ZTOV(zp); 1355fa9e4066Sahrens /* 1356fa9e4066Sahrens * If vnode is for a device return a specfs vnode instead. 1357fa9e4066Sahrens */ 1358fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1359fa9e4066Sahrens struct vnode *svp; 1360fa9e4066Sahrens 1361fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1362fa9e4066Sahrens VN_RELE(*vpp); 1363fa9e4066Sahrens if (svp == NULL) { 1364fa9e4066Sahrens error = ENOSYS; 1365fa9e4066Sahrens } 1366fa9e4066Sahrens *vpp = svp; 1367fa9e4066Sahrens } 1368fa9e4066Sahrens } 1369da6c28aaSamw if (aclp) 1370da6c28aaSamw zfs_acl_free(aclp); 1371fa9e4066Sahrens 1372fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1373fa9e4066Sahrens return (error); 1374fa9e4066Sahrens } 1375fa9e4066Sahrens 1376fa9e4066Sahrens /* 1377fa9e4066Sahrens * Remove an entry from a directory. 1378fa9e4066Sahrens * 1379fa9e4066Sahrens * IN: dvp - vnode of directory to remove entry from. 1380fa9e4066Sahrens * name - name of entry to remove. 1381fa9e4066Sahrens * cr - credentials of caller. 1382da6c28aaSamw * ct - caller context 1383da6c28aaSamw * flags - case flags 1384fa9e4066Sahrens * 1385fa9e4066Sahrens * RETURN: 0 if success 1386fa9e4066Sahrens * error code if failure 1387fa9e4066Sahrens * 1388fa9e4066Sahrens * Timestamps: 1389fa9e4066Sahrens * dvp - ctime|mtime 1390fa9e4066Sahrens * vp - ctime (if nlink > 0) 1391fa9e4066Sahrens */ 1392da6c28aaSamw /*ARGSUSED*/ 1393fa9e4066Sahrens static int 1394da6c28aaSamw zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct, 1395da6c28aaSamw int flags) 1396fa9e4066Sahrens { 1397fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1398fa9e4066Sahrens znode_t *xzp = NULL; 1399fa9e4066Sahrens vnode_t *vp; 1400fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1401f18faf3fSek zilog_t *zilog; 1402fa9e4066Sahrens uint64_t acl_obj, xattr_obj; 1403fa9e4066Sahrens zfs_dirlock_t *dl; 1404fa9e4066Sahrens dmu_tx_t *tx; 1405893a6d32Sahrens boolean_t may_delete_now, delete_now = FALSE; 1406cdb0ab79Smaybee boolean_t unlinked, toobig = FALSE; 1407da6c28aaSamw uint64_t txtype; 1408da6c28aaSamw pathname_t *realnmp = NULL; 1409da6c28aaSamw pathname_t realnm; 1410fa9e4066Sahrens int error; 1411da6c28aaSamw int zflg = ZEXISTS; 1412fa9e4066Sahrens 14133cb34c60Sahrens ZFS_ENTER(zfsvfs); 14143cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1415f18faf3fSek zilog = zfsvfs->z_log; 1416fa9e4066Sahrens 1417da6c28aaSamw if (flags & FIGNORECASE) { 1418da6c28aaSamw zflg |= ZCILOOK; 1419da6c28aaSamw pn_alloc(&realnm); 1420da6c28aaSamw realnmp = &realnm; 1421da6c28aaSamw } 1422da6c28aaSamw 1423fa9e4066Sahrens top: 1424fa9e4066Sahrens /* 1425fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1426fa9e4066Sahrens */ 1427da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1428da6c28aaSamw NULL, realnmp)) { 1429da6c28aaSamw if (realnmp) 1430da6c28aaSamw pn_free(realnmp); 1431fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1432fa9e4066Sahrens return (error); 1433fa9e4066Sahrens } 1434fa9e4066Sahrens 1435fa9e4066Sahrens vp = ZTOV(zp); 1436fa9e4066Sahrens 1437fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1438fa9e4066Sahrens goto out; 1439fa9e4066Sahrens } 1440fa9e4066Sahrens 1441fa9e4066Sahrens /* 1442fa9e4066Sahrens * Need to use rmdir for removing directories. 1443fa9e4066Sahrens */ 1444fa9e4066Sahrens if (vp->v_type == VDIR) { 1445fa9e4066Sahrens error = EPERM; 1446fa9e4066Sahrens goto out; 1447fa9e4066Sahrens } 1448fa9e4066Sahrens 1449da6c28aaSamw vnevent_remove(vp, dvp, name, ct); 1450fa9e4066Sahrens 1451da6c28aaSamw if (realnmp) 1452ab04eb8eStimh dnlc_remove(dvp, realnmp->pn_buf); 1453da6c28aaSamw else 1454da6c28aaSamw dnlc_remove(dvp, name); 1455033f9833Sek 1456fa9e4066Sahrens mutex_enter(&vp->v_lock); 1457fa9e4066Sahrens may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1458fa9e4066Sahrens mutex_exit(&vp->v_lock); 1459fa9e4066Sahrens 1460fa9e4066Sahrens /* 1461893a6d32Sahrens * We may delete the znode now, or we may put it in the unlinked set; 1462fa9e4066Sahrens * it depends on whether we're the last link, and on whether there are 1463fa9e4066Sahrens * other holds on the vnode. So we dmu_tx_hold() the right things to 1464fa9e4066Sahrens * allow for either case. 1465fa9e4066Sahrens */ 1466fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1467ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1468fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1469cdb0ab79Smaybee if (may_delete_now) { 1470cdb0ab79Smaybee toobig = 1471cdb0ab79Smaybee zp->z_phys->zp_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT; 1472cdb0ab79Smaybee /* if the file is too big, only hold_free a token amount */ 1473cdb0ab79Smaybee dmu_tx_hold_free(tx, zp->z_id, 0, 1474cdb0ab79Smaybee (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END)); 1475cdb0ab79Smaybee } 1476fa9e4066Sahrens 1477fa9e4066Sahrens /* are there any extended attributes? */ 1478fa9e4066Sahrens if ((xattr_obj = zp->z_phys->zp_xattr) != 0) { 1479fa9e4066Sahrens /* XXX - do we need this if we are deleting? */ 1480fa9e4066Sahrens dmu_tx_hold_bonus(tx, xattr_obj); 1481fa9e4066Sahrens } 1482fa9e4066Sahrens 1483fa9e4066Sahrens /* are there any additional acls */ 1484fa9e4066Sahrens if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 && 1485fa9e4066Sahrens may_delete_now) 1486fa9e4066Sahrens dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1487fa9e4066Sahrens 1488fa9e4066Sahrens /* charge as an update -- would be nice not to charge at all */ 1489893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1490fa9e4066Sahrens 1491fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1492fa9e4066Sahrens if (error) { 1493fa9e4066Sahrens zfs_dirent_unlock(dl); 1494fa9e4066Sahrens VN_RELE(vp); 1495fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 14968a2f1b91Sahrens dmu_tx_wait(tx); 14978a2f1b91Sahrens dmu_tx_abort(tx); 1498fa9e4066Sahrens goto top; 1499fa9e4066Sahrens } 1500da6c28aaSamw if (realnmp) 1501da6c28aaSamw pn_free(realnmp); 15028a2f1b91Sahrens dmu_tx_abort(tx); 1503fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1504fa9e4066Sahrens return (error); 1505fa9e4066Sahrens } 1506fa9e4066Sahrens 1507fa9e4066Sahrens /* 1508fa9e4066Sahrens * Remove the directory entry. 1509fa9e4066Sahrens */ 1510da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked); 1511fa9e4066Sahrens 1512fa9e4066Sahrens if (error) { 1513fa9e4066Sahrens dmu_tx_commit(tx); 1514fa9e4066Sahrens goto out; 1515fa9e4066Sahrens } 1516fa9e4066Sahrens 1517893a6d32Sahrens if (unlinked) { 1518fa9e4066Sahrens mutex_enter(&vp->v_lock); 1519cdb0ab79Smaybee delete_now = may_delete_now && !toobig && 1520fa9e4066Sahrens vp->v_count == 1 && !vn_has_cached_data(vp) && 1521fa9e4066Sahrens zp->z_phys->zp_xattr == xattr_obj && 1522fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj; 1523fa9e4066Sahrens mutex_exit(&vp->v_lock); 1524fa9e4066Sahrens } 1525fa9e4066Sahrens 1526fa9e4066Sahrens if (delete_now) { 1527fa9e4066Sahrens if (zp->z_phys->zp_xattr) { 1528fa9e4066Sahrens error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp); 1529fa9e4066Sahrens ASSERT3U(error, ==, 0); 1530fa9e4066Sahrens ASSERT3U(xzp->z_phys->zp_links, ==, 2); 1531fa9e4066Sahrens dmu_buf_will_dirty(xzp->z_dbuf, tx); 1532fa9e4066Sahrens mutex_enter(&xzp->z_lock); 1533893a6d32Sahrens xzp->z_unlinked = 1; 1534fa9e4066Sahrens xzp->z_phys->zp_links = 0; 1535fa9e4066Sahrens mutex_exit(&xzp->z_lock); 1536893a6d32Sahrens zfs_unlinked_add(xzp, tx); 1537fa9e4066Sahrens zp->z_phys->zp_xattr = 0; /* probably unnecessary */ 1538fa9e4066Sahrens } 1539fa9e4066Sahrens mutex_enter(&zp->z_lock); 1540fa9e4066Sahrens mutex_enter(&vp->v_lock); 1541fa9e4066Sahrens vp->v_count--; 1542fa9e4066Sahrens ASSERT3U(vp->v_count, ==, 0); 1543fa9e4066Sahrens mutex_exit(&vp->v_lock); 1544fa9e4066Sahrens mutex_exit(&zp->z_lock); 1545fa9e4066Sahrens zfs_znode_delete(zp, tx); 1546893a6d32Sahrens } else if (unlinked) { 1547893a6d32Sahrens zfs_unlinked_add(zp, tx); 1548fa9e4066Sahrens } 1549fa9e4066Sahrens 1550da6c28aaSamw txtype = TX_REMOVE; 1551da6c28aaSamw if (flags & FIGNORECASE) 1552da6c28aaSamw txtype |= TX_CI; 1553da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1554fa9e4066Sahrens 1555fa9e4066Sahrens dmu_tx_commit(tx); 1556fa9e4066Sahrens out: 1557da6c28aaSamw if (realnmp) 1558da6c28aaSamw pn_free(realnmp); 1559da6c28aaSamw 1560fa9e4066Sahrens zfs_dirent_unlock(dl); 1561fa9e4066Sahrens 1562fa9e4066Sahrens if (!delete_now) { 1563fa9e4066Sahrens VN_RELE(vp); 1564fa9e4066Sahrens } else if (xzp) { 1565cdb0ab79Smaybee /* this rele is delayed to prevent nesting transactions */ 1566fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 1567fa9e4066Sahrens } 1568fa9e4066Sahrens 1569fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1570fa9e4066Sahrens return (error); 1571fa9e4066Sahrens } 1572fa9e4066Sahrens 1573fa9e4066Sahrens /* 1574fa9e4066Sahrens * Create a new directory and insert it into dvp using the name 1575fa9e4066Sahrens * provided. Return a pointer to the inserted directory. 1576fa9e4066Sahrens * 1577fa9e4066Sahrens * IN: dvp - vnode of directory to add subdir to. 1578fa9e4066Sahrens * dirname - name of new directory. 1579fa9e4066Sahrens * vap - attributes of new directory. 1580fa9e4066Sahrens * cr - credentials of caller. 1581da6c28aaSamw * ct - caller context 1582da6c28aaSamw * vsecp - ACL to be set 1583fa9e4066Sahrens * 1584fa9e4066Sahrens * OUT: vpp - vnode of created directory. 1585fa9e4066Sahrens * 1586fa9e4066Sahrens * RETURN: 0 if success 1587fa9e4066Sahrens * error code if failure 1588fa9e4066Sahrens * 1589fa9e4066Sahrens * Timestamps: 1590fa9e4066Sahrens * dvp - ctime|mtime updated 1591fa9e4066Sahrens * vp - ctime|mtime|atime updated 1592fa9e4066Sahrens */ 1593da6c28aaSamw /*ARGSUSED*/ 1594fa9e4066Sahrens static int 1595da6c28aaSamw zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr, 1596da6c28aaSamw caller_context_t *ct, int flags, vsecattr_t *vsecp) 1597fa9e4066Sahrens { 1598fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1599fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1600f18faf3fSek zilog_t *zilog; 1601fa9e4066Sahrens zfs_dirlock_t *dl; 1602da6c28aaSamw uint64_t txtype; 1603fa9e4066Sahrens dmu_tx_t *tx; 1604fa9e4066Sahrens int error; 1605da6c28aaSamw zfs_acl_t *aclp = NULL; 1606da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 1607da6c28aaSamw int zf = ZNEW; 1608fa9e4066Sahrens 1609fa9e4066Sahrens ASSERT(vap->va_type == VDIR); 1610fa9e4066Sahrens 1611da6c28aaSamw /* 1612da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1613da6c28aaSamw * make sure file system is at proper version 1614da6c28aaSamw */ 1615da6c28aaSamw 1616da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1617da6c28aaSamw (vsecp || (vap->va_mask & AT_XVATTR) || IS_EPHEMERAL(crgetuid(cr))|| 1618da6c28aaSamw IS_EPHEMERAL(crgetgid(cr)))) 1619da6c28aaSamw return (EINVAL); 1620da6c28aaSamw 16213cb34c60Sahrens ZFS_ENTER(zfsvfs); 16223cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1623f18faf3fSek zilog = zfsvfs->z_log; 1624fa9e4066Sahrens 1625fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) { 1626fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1627fa9e4066Sahrens return (EINVAL); 1628fa9e4066Sahrens } 1629da6c28aaSamw 1630de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(dirname, 1631da6c28aaSamw strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1632da6c28aaSamw ZFS_EXIT(zfsvfs); 1633da6c28aaSamw return (EILSEQ); 1634da6c28aaSamw } 1635da6c28aaSamw if (flags & FIGNORECASE) 1636da6c28aaSamw zf |= ZCILOOK; 1637da6c28aaSamw 1638da6c28aaSamw if (vap->va_mask & AT_XVATTR) 1639da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1640da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1641da6c28aaSamw ZFS_EXIT(zfsvfs); 1642da6c28aaSamw return (error); 1643da6c28aaSamw } 1644fa9e4066Sahrens 1645fa9e4066Sahrens /* 1646fa9e4066Sahrens * First make sure the new directory doesn't exist. 1647fa9e4066Sahrens */ 1648da6c28aaSamw top: 1649da6c28aaSamw *vpp = NULL; 1650da6c28aaSamw 1651da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf, 1652da6c28aaSamw NULL, NULL)) { 1653fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1654fa9e4066Sahrens return (error); 1655fa9e4066Sahrens } 1656fa9e4066Sahrens 1657da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) { 1658d2443e76Smarks zfs_dirent_unlock(dl); 1659d2443e76Smarks ZFS_EXIT(zfsvfs); 1660d2443e76Smarks return (error); 1661d2443e76Smarks } 1662d2443e76Smarks 1663da6c28aaSamw if (vsecp && aclp == NULL) { 1664da6c28aaSamw error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, &aclp); 1665da6c28aaSamw if (error) { 1666da6c28aaSamw zfs_dirent_unlock(dl); 1667da6c28aaSamw ZFS_EXIT(zfsvfs); 1668da6c28aaSamw return (error); 1669da6c28aaSamw } 1670da6c28aaSamw } 1671fa9e4066Sahrens /* 1672fa9e4066Sahrens * Add a new entry to the directory. 1673fa9e4066Sahrens */ 1674fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1675ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 1676ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 1677e0d35c44Smarks if ((aclp && aclp->z_has_fuids) || IS_EPHEMERAL(crgetuid(cr)) || 1678e0d35c44Smarks IS_EPHEMERAL(crgetgid(cr))) { 16794c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 16804c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 16814c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 16824c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 16834c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); 16844c841f60Smarks } else { 16854c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 16864c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 16874c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 16884c841f60Smarks } 1689da6c28aaSamw } 1690da6c28aaSamw if ((dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) || aclp) 1691fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1692fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1693fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1694fa9e4066Sahrens if (error) { 1695fa9e4066Sahrens zfs_dirent_unlock(dl); 1696fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 16978a2f1b91Sahrens dmu_tx_wait(tx); 16988a2f1b91Sahrens dmu_tx_abort(tx); 1699fa9e4066Sahrens goto top; 1700fa9e4066Sahrens } 17018a2f1b91Sahrens dmu_tx_abort(tx); 1702fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1703da6c28aaSamw if (aclp) 1704da6c28aaSamw zfs_acl_free(aclp); 1705fa9e4066Sahrens return (error); 1706fa9e4066Sahrens } 1707fa9e4066Sahrens 1708fa9e4066Sahrens /* 1709fa9e4066Sahrens * Create new node. 1710fa9e4066Sahrens */ 17114ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, aclp, &fuidp); 1712da6c28aaSamw 1713da6c28aaSamw if (aclp) 1714da6c28aaSamw zfs_acl_free(aclp); 1715fa9e4066Sahrens 1716fa9e4066Sahrens /* 1717fa9e4066Sahrens * Now put new name in parent dir. 1718fa9e4066Sahrens */ 1719fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1720fa9e4066Sahrens 1721fa9e4066Sahrens *vpp = ZTOV(zp); 1722fa9e4066Sahrens 1723da6c28aaSamw txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap); 1724da6c28aaSamw if (flags & FIGNORECASE) 1725da6c28aaSamw txtype |= TX_CI; 1726da6c28aaSamw zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, fuidp, vap); 1727da6c28aaSamw 1728da6c28aaSamw if (fuidp) 1729da6c28aaSamw zfs_fuid_info_free(fuidp); 1730fa9e4066Sahrens dmu_tx_commit(tx); 1731fa9e4066Sahrens 1732fa9e4066Sahrens zfs_dirent_unlock(dl); 1733fa9e4066Sahrens 1734fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1735fa9e4066Sahrens return (0); 1736fa9e4066Sahrens } 1737fa9e4066Sahrens 1738fa9e4066Sahrens /* 1739fa9e4066Sahrens * Remove a directory subdir entry. If the current working 1740fa9e4066Sahrens * directory is the same as the subdir to be removed, the 1741fa9e4066Sahrens * remove will fail. 1742fa9e4066Sahrens * 1743fa9e4066Sahrens * IN: dvp - vnode of directory to remove from. 1744fa9e4066Sahrens * name - name of directory to be removed. 1745fa9e4066Sahrens * cwd - vnode of current working directory. 1746fa9e4066Sahrens * cr - credentials of caller. 1747da6c28aaSamw * ct - caller context 1748da6c28aaSamw * flags - case flags 1749fa9e4066Sahrens * 1750fa9e4066Sahrens * RETURN: 0 if success 1751fa9e4066Sahrens * error code if failure 1752fa9e4066Sahrens * 1753fa9e4066Sahrens * Timestamps: 1754fa9e4066Sahrens * dvp - ctime|mtime updated 1755fa9e4066Sahrens */ 1756da6c28aaSamw /*ARGSUSED*/ 1757fa9e4066Sahrens static int 1758da6c28aaSamw zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr, 1759da6c28aaSamw caller_context_t *ct, int flags) 1760fa9e4066Sahrens { 1761fa9e4066Sahrens znode_t *dzp = VTOZ(dvp); 1762fa9e4066Sahrens znode_t *zp; 1763fa9e4066Sahrens vnode_t *vp; 1764fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1765f18faf3fSek zilog_t *zilog; 1766fa9e4066Sahrens zfs_dirlock_t *dl; 1767fa9e4066Sahrens dmu_tx_t *tx; 1768fa9e4066Sahrens int error; 1769da6c28aaSamw int zflg = ZEXISTS; 1770fa9e4066Sahrens 17713cb34c60Sahrens ZFS_ENTER(zfsvfs); 17723cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1773f18faf3fSek zilog = zfsvfs->z_log; 1774fa9e4066Sahrens 1775da6c28aaSamw if (flags & FIGNORECASE) 1776da6c28aaSamw zflg |= ZCILOOK; 1777fa9e4066Sahrens top: 1778fa9e4066Sahrens zp = NULL; 1779fa9e4066Sahrens 1780fa9e4066Sahrens /* 1781fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1782fa9e4066Sahrens */ 1783da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1784da6c28aaSamw NULL, NULL)) { 1785fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1786fa9e4066Sahrens return (error); 1787fa9e4066Sahrens } 1788fa9e4066Sahrens 1789fa9e4066Sahrens vp = ZTOV(zp); 1790fa9e4066Sahrens 1791fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1792fa9e4066Sahrens goto out; 1793fa9e4066Sahrens } 1794fa9e4066Sahrens 1795fa9e4066Sahrens if (vp->v_type != VDIR) { 1796fa9e4066Sahrens error = ENOTDIR; 1797fa9e4066Sahrens goto out; 1798fa9e4066Sahrens } 1799fa9e4066Sahrens 1800fa9e4066Sahrens if (vp == cwd) { 1801fa9e4066Sahrens error = EINVAL; 1802fa9e4066Sahrens goto out; 1803fa9e4066Sahrens } 1804fa9e4066Sahrens 1805da6c28aaSamw vnevent_rmdir(vp, dvp, name, ct); 1806fa9e4066Sahrens 1807fa9e4066Sahrens /* 1808af2c4821Smaybee * Grab a lock on the directory to make sure that noone is 1809af2c4821Smaybee * trying to add (or lookup) entries while we are removing it. 1810af2c4821Smaybee */ 1811af2c4821Smaybee rw_enter(&zp->z_name_lock, RW_WRITER); 1812af2c4821Smaybee 1813af2c4821Smaybee /* 1814af2c4821Smaybee * Grab a lock on the parent pointer to make sure we play well 1815fa9e4066Sahrens * with the treewalk and directory rename code. 1816fa9e4066Sahrens */ 1817fa9e4066Sahrens rw_enter(&zp->z_parent_lock, RW_WRITER); 1818fa9e4066Sahrens 1819fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1820ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1821fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1822893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1823fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1824fa9e4066Sahrens if (error) { 1825fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1826af2c4821Smaybee rw_exit(&zp->z_name_lock); 1827fa9e4066Sahrens zfs_dirent_unlock(dl); 1828fa9e4066Sahrens VN_RELE(vp); 1829fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 18308a2f1b91Sahrens dmu_tx_wait(tx); 18318a2f1b91Sahrens dmu_tx_abort(tx); 1832fa9e4066Sahrens goto top; 1833fa9e4066Sahrens } 18348a2f1b91Sahrens dmu_tx_abort(tx); 1835fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1836fa9e4066Sahrens return (error); 1837fa9e4066Sahrens } 1838fa9e4066Sahrens 1839da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, NULL); 1840fa9e4066Sahrens 1841da6c28aaSamw if (error == 0) { 1842da6c28aaSamw uint64_t txtype = TX_RMDIR; 1843da6c28aaSamw if (flags & FIGNORECASE) 1844da6c28aaSamw txtype |= TX_CI; 1845da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1846da6c28aaSamw } 1847fa9e4066Sahrens 1848fa9e4066Sahrens dmu_tx_commit(tx); 1849fa9e4066Sahrens 1850fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1851af2c4821Smaybee rw_exit(&zp->z_name_lock); 1852fa9e4066Sahrens out: 1853fa9e4066Sahrens zfs_dirent_unlock(dl); 1854fa9e4066Sahrens 1855fa9e4066Sahrens VN_RELE(vp); 1856fa9e4066Sahrens 1857fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1858fa9e4066Sahrens return (error); 1859fa9e4066Sahrens } 1860fa9e4066Sahrens 1861fa9e4066Sahrens /* 1862fa9e4066Sahrens * Read as many directory entries as will fit into the provided 1863fa9e4066Sahrens * buffer from the given directory cursor position (specified in 1864fa9e4066Sahrens * the uio structure. 1865fa9e4066Sahrens * 1866fa9e4066Sahrens * IN: vp - vnode of directory to read. 1867fa9e4066Sahrens * uio - structure supplying read location, range info, 1868fa9e4066Sahrens * and return buffer. 1869fa9e4066Sahrens * cr - credentials of caller. 1870da6c28aaSamw * ct - caller context 1871da6c28aaSamw * flags - case flags 1872fa9e4066Sahrens * 1873fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 1874fa9e4066Sahrens * eofp - set to true if end-of-file detected. 1875fa9e4066Sahrens * 1876fa9e4066Sahrens * RETURN: 0 if success 1877fa9e4066Sahrens * error code if failure 1878fa9e4066Sahrens * 1879fa9e4066Sahrens * Timestamps: 1880fa9e4066Sahrens * vp - atime updated 1881fa9e4066Sahrens * 1882fa9e4066Sahrens * Note that the low 4 bits of the cookie returned by zap is always zero. 1883fa9e4066Sahrens * This allows us to use the low range for "special" directory entries: 1884fa9e4066Sahrens * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 1885fa9e4066Sahrens * we use the offset 2 for the '.zfs' directory. 1886fa9e4066Sahrens */ 1887fa9e4066Sahrens /* ARGSUSED */ 1888fa9e4066Sahrens static int 1889da6c28aaSamw zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, 1890da6c28aaSamw caller_context_t *ct, int flags) 1891fa9e4066Sahrens { 1892fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1893fa9e4066Sahrens iovec_t *iovp; 1894da6c28aaSamw edirent_t *eodp; 1895fa9e4066Sahrens dirent64_t *odp; 1896fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 18977f6e3e7dSperrin objset_t *os; 1898fa9e4066Sahrens caddr_t outbuf; 1899fa9e4066Sahrens size_t bufsize; 1900fa9e4066Sahrens zap_cursor_t zc; 1901fa9e4066Sahrens zap_attribute_t zap; 1902fa9e4066Sahrens uint_t bytes_wanted; 1903fa9e4066Sahrens uint64_t offset; /* must be unsigned; checks for < 1 */ 1904fa9e4066Sahrens int local_eof; 19057f6e3e7dSperrin int outcount; 19067f6e3e7dSperrin int error; 19077f6e3e7dSperrin uint8_t prefetch; 1908b38f0970Sck boolean_t check_sysattrs; 1909fa9e4066Sahrens 19103cb34c60Sahrens ZFS_ENTER(zfsvfs); 19113cb34c60Sahrens ZFS_VERIFY_ZP(zp); 1912fa9e4066Sahrens 1913fa9e4066Sahrens /* 1914fa9e4066Sahrens * If we are not given an eof variable, 1915fa9e4066Sahrens * use a local one. 1916fa9e4066Sahrens */ 1917fa9e4066Sahrens if (eofp == NULL) 1918fa9e4066Sahrens eofp = &local_eof; 1919fa9e4066Sahrens 1920fa9e4066Sahrens /* 1921fa9e4066Sahrens * Check for valid iov_len. 1922fa9e4066Sahrens */ 1923fa9e4066Sahrens if (uio->uio_iov->iov_len <= 0) { 1924fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1925fa9e4066Sahrens return (EINVAL); 1926fa9e4066Sahrens } 1927fa9e4066Sahrens 1928fa9e4066Sahrens /* 1929fa9e4066Sahrens * Quit if directory has been removed (posix) 1930fa9e4066Sahrens */ 1931893a6d32Sahrens if ((*eofp = zp->z_unlinked) != 0) { 1932fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1933fa9e4066Sahrens return (0); 1934fa9e4066Sahrens } 1935fa9e4066Sahrens 19367f6e3e7dSperrin error = 0; 19377f6e3e7dSperrin os = zfsvfs->z_os; 19387f6e3e7dSperrin offset = uio->uio_loffset; 19397f6e3e7dSperrin prefetch = zp->z_zn_prefetch; 19407f6e3e7dSperrin 1941fa9e4066Sahrens /* 1942fa9e4066Sahrens * Initialize the iterator cursor. 1943fa9e4066Sahrens */ 1944fa9e4066Sahrens if (offset <= 3) { 1945fa9e4066Sahrens /* 1946fa9e4066Sahrens * Start iteration from the beginning of the directory. 1947fa9e4066Sahrens */ 19487f6e3e7dSperrin zap_cursor_init(&zc, os, zp->z_id); 1949fa9e4066Sahrens } else { 1950fa9e4066Sahrens /* 1951fa9e4066Sahrens * The offset is a serialized cursor. 1952fa9e4066Sahrens */ 19537f6e3e7dSperrin zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 1954fa9e4066Sahrens } 1955fa9e4066Sahrens 1956fa9e4066Sahrens /* 1957fa9e4066Sahrens * Get space to change directory entries into fs independent format. 1958fa9e4066Sahrens */ 1959fa9e4066Sahrens iovp = uio->uio_iov; 1960fa9e4066Sahrens bytes_wanted = iovp->iov_len; 1961fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 1962fa9e4066Sahrens bufsize = bytes_wanted; 1963fa9e4066Sahrens outbuf = kmem_alloc(bufsize, KM_SLEEP); 1964fa9e4066Sahrens odp = (struct dirent64 *)outbuf; 1965fa9e4066Sahrens } else { 1966fa9e4066Sahrens bufsize = bytes_wanted; 1967fa9e4066Sahrens odp = (struct dirent64 *)iovp->iov_base; 1968fa9e4066Sahrens } 1969da6c28aaSamw eodp = (struct edirent *)odp; 1970fa9e4066Sahrens 1971b38f0970Sck /* 1972b38f0970Sck * If this VFS supports system attributes; and we're looking at an 1973b38f0970Sck * extended attribute directory; and we care about normalization 1974b38f0970Sck * conflicts on this vfs; then we must check for normalization 1975b38f0970Sck * conflicts with the sysattr name space. 1976b38f0970Sck */ 1977b38f0970Sck check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_XVATTR) && 1978b38f0970Sck (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm && 1979b38f0970Sck (flags & V_RDDIR_ENTFLAGS); 1980b38f0970Sck 1981fa9e4066Sahrens /* 1982fa9e4066Sahrens * Transform to file-system independent format 1983fa9e4066Sahrens */ 1984fa9e4066Sahrens outcount = 0; 1985fa9e4066Sahrens while (outcount < bytes_wanted) { 1986b1b8ab34Slling ino64_t objnum; 1987b1b8ab34Slling ushort_t reclen; 1988b1b8ab34Slling off64_t *next; 1989b1b8ab34Slling 1990fa9e4066Sahrens /* 1991fa9e4066Sahrens * Special case `.', `..', and `.zfs'. 1992fa9e4066Sahrens */ 1993fa9e4066Sahrens if (offset == 0) { 1994fa9e4066Sahrens (void) strcpy(zap.za_name, "."); 1995da6c28aaSamw zap.za_normalization_conflict = 0; 1996b1b8ab34Slling objnum = zp->z_id; 1997fa9e4066Sahrens } else if (offset == 1) { 1998fa9e4066Sahrens (void) strcpy(zap.za_name, ".."); 1999da6c28aaSamw zap.za_normalization_conflict = 0; 2000b1b8ab34Slling objnum = zp->z_phys->zp_parent; 2001fa9e4066Sahrens } else if (offset == 2 && zfs_show_ctldir(zp)) { 2002fa9e4066Sahrens (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 2003da6c28aaSamw zap.za_normalization_conflict = 0; 2004b1b8ab34Slling objnum = ZFSCTL_INO_ROOT; 2005fa9e4066Sahrens } else { 2006fa9e4066Sahrens /* 2007fa9e4066Sahrens * Grab next entry. 2008fa9e4066Sahrens */ 2009fa9e4066Sahrens if (error = zap_cursor_retrieve(&zc, &zap)) { 2010fa9e4066Sahrens if ((*eofp = (error == ENOENT)) != 0) 2011fa9e4066Sahrens break; 2012fa9e4066Sahrens else 2013fa9e4066Sahrens goto update; 2014fa9e4066Sahrens } 2015fa9e4066Sahrens 2016fa9e4066Sahrens if (zap.za_integer_length != 8 || 2017fa9e4066Sahrens zap.za_num_integers != 1) { 2018fa9e4066Sahrens cmn_err(CE_WARN, "zap_readdir: bad directory " 2019fa9e4066Sahrens "entry, obj = %lld, offset = %lld\n", 2020fa9e4066Sahrens (u_longlong_t)zp->z_id, 2021fa9e4066Sahrens (u_longlong_t)offset); 2022fa9e4066Sahrens error = ENXIO; 2023fa9e4066Sahrens goto update; 2024fa9e4066Sahrens } 2025b1b8ab34Slling 2026b1b8ab34Slling objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); 2027b1b8ab34Slling /* 2028b1b8ab34Slling * MacOS X can extract the object type here such as: 2029b1b8ab34Slling * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); 2030b1b8ab34Slling */ 2031b38f0970Sck 2032b38f0970Sck if (check_sysattrs && !zap.za_normalization_conflict) { 2033b38f0970Sck zap.za_normalization_conflict = 2034b38f0970Sck xattr_sysattr_casechk(zap.za_name); 2035b38f0970Sck } 2036fa9e4066Sahrens } 2037da6c28aaSamw 2038da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) 2039da6c28aaSamw reclen = EDIRENT_RECLEN(strlen(zap.za_name)); 2040da6c28aaSamw else 2041da6c28aaSamw reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 2042fa9e4066Sahrens 2043fa9e4066Sahrens /* 2044fa9e4066Sahrens * Will this entry fit in the buffer? 2045fa9e4066Sahrens */ 2046b1b8ab34Slling if (outcount + reclen > bufsize) { 2047fa9e4066Sahrens /* 2048fa9e4066Sahrens * Did we manage to fit anything in the buffer? 2049fa9e4066Sahrens */ 2050fa9e4066Sahrens if (!outcount) { 2051fa9e4066Sahrens error = EINVAL; 2052fa9e4066Sahrens goto update; 2053fa9e4066Sahrens } 2054fa9e4066Sahrens break; 2055fa9e4066Sahrens } 2056da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) { 2057da6c28aaSamw /* 2058da6c28aaSamw * Add extended flag entry: 2059da6c28aaSamw */ 2060da6c28aaSamw eodp->ed_ino = objnum; 2061da6c28aaSamw eodp->ed_reclen = reclen; 2062da6c28aaSamw /* NOTE: ed_off is the offset for the *next* entry */ 2063da6c28aaSamw next = &(eodp->ed_off); 2064da6c28aaSamw eodp->ed_eflags = zap.za_normalization_conflict ? 2065da6c28aaSamw ED_CASE_CONFLICT : 0; 2066da6c28aaSamw (void) strncpy(eodp->ed_name, zap.za_name, 2067da6c28aaSamw EDIRENT_NAMELEN(reclen)); 2068da6c28aaSamw eodp = (edirent_t *)((intptr_t)eodp + reclen); 2069da6c28aaSamw } else { 2070da6c28aaSamw /* 2071da6c28aaSamw * Add normal entry: 2072da6c28aaSamw */ 2073da6c28aaSamw odp->d_ino = objnum; 2074da6c28aaSamw odp->d_reclen = reclen; 2075da6c28aaSamw /* NOTE: d_off is the offset for the *next* entry */ 2076da6c28aaSamw next = &(odp->d_off); 2077da6c28aaSamw (void) strncpy(odp->d_name, zap.za_name, 2078da6c28aaSamw DIRENT64_NAMELEN(reclen)); 2079da6c28aaSamw odp = (dirent64_t *)((intptr_t)odp + reclen); 2080da6c28aaSamw } 2081b1b8ab34Slling outcount += reclen; 2082fa9e4066Sahrens 2083fa9e4066Sahrens ASSERT(outcount <= bufsize); 2084fa9e4066Sahrens 2085fa9e4066Sahrens /* Prefetch znode */ 20867f6e3e7dSperrin if (prefetch) 2087b1b8ab34Slling dmu_prefetch(os, objnum, 0, 0); 2088fa9e4066Sahrens 2089fa9e4066Sahrens /* 2090fa9e4066Sahrens * Move to the next entry, fill in the previous offset. 2091fa9e4066Sahrens */ 2092fa9e4066Sahrens if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 2093fa9e4066Sahrens zap_cursor_advance(&zc); 2094fa9e4066Sahrens offset = zap_cursor_serialize(&zc); 2095fa9e4066Sahrens } else { 2096fa9e4066Sahrens offset += 1; 2097fa9e4066Sahrens } 2098fa9e4066Sahrens *next = offset; 2099fa9e4066Sahrens } 21007f6e3e7dSperrin zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 2101fa9e4066Sahrens 2102fa9e4066Sahrens if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 2103fa9e4066Sahrens iovp->iov_base += outcount; 2104fa9e4066Sahrens iovp->iov_len -= outcount; 2105fa9e4066Sahrens uio->uio_resid -= outcount; 2106fa9e4066Sahrens } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 2107fa9e4066Sahrens /* 2108fa9e4066Sahrens * Reset the pointer. 2109fa9e4066Sahrens */ 2110fa9e4066Sahrens offset = uio->uio_loffset; 2111fa9e4066Sahrens } 2112fa9e4066Sahrens 2113fa9e4066Sahrens update: 211487e5029aSahrens zap_cursor_fini(&zc); 2115fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2116fa9e4066Sahrens kmem_free(outbuf, bufsize); 2117fa9e4066Sahrens 2118fa9e4066Sahrens if (error == ENOENT) 2119fa9e4066Sahrens error = 0; 2120fa9e4066Sahrens 2121fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2122fa9e4066Sahrens 2123fa9e4066Sahrens uio->uio_loffset = offset; 2124fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2125fa9e4066Sahrens return (error); 2126fa9e4066Sahrens } 2127fa9e4066Sahrens 2128ec533521Sfr ulong_t zfs_fsync_sync_cnt = 4; 2129ec533521Sfr 2130fa9e4066Sahrens static int 2131da6c28aaSamw zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 2132fa9e4066Sahrens { 2133fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2134fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2135fa9e4066Sahrens 2136b468a217Seschrock /* 2137b468a217Seschrock * Regardless of whether this is required for standards conformance, 2138b468a217Seschrock * this is the logical behavior when fsync() is called on a file with 2139b468a217Seschrock * dirty pages. We use B_ASYNC since the ZIL transactions are already 2140b468a217Seschrock * going to be pushed out as part of the zil_commit(). 2141b468a217Seschrock */ 2142b468a217Seschrock if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && 2143b468a217Seschrock (vp->v_type == VREG) && !(IS_SWAPVP(vp))) 2144da6c28aaSamw (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr, ct); 2145b468a217Seschrock 2146ec533521Sfr (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt); 2147ec533521Sfr 21483cb34c60Sahrens ZFS_ENTER(zfsvfs); 21493cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2150b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 2151fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2152fa9e4066Sahrens return (0); 2153fa9e4066Sahrens } 2154fa9e4066Sahrens 2155da6c28aaSamw 2156fa9e4066Sahrens /* 2157fa9e4066Sahrens * Get the requested file attributes and place them in the provided 2158fa9e4066Sahrens * vattr structure. 2159fa9e4066Sahrens * 2160fa9e4066Sahrens * IN: vp - vnode of file. 2161fa9e4066Sahrens * vap - va_mask identifies requested attributes. 2162da6c28aaSamw * If AT_XVATTR set, then optional attrs are requested 2163da6c28aaSamw * flags - ATTR_NOACLCHECK (CIFS server context) 2164fa9e4066Sahrens * cr - credentials of caller. 2165da6c28aaSamw * ct - caller context 2166fa9e4066Sahrens * 2167fa9e4066Sahrens * OUT: vap - attribute values. 2168fa9e4066Sahrens * 2169fa9e4066Sahrens * RETURN: 0 (always succeeds) 2170fa9e4066Sahrens */ 2171fa9e4066Sahrens /* ARGSUSED */ 2172fa9e4066Sahrens static int 2173da6c28aaSamw zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2174da6c28aaSamw caller_context_t *ct) 2175fa9e4066Sahrens { 2176fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2177fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2178f18faf3fSek znode_phys_t *pzp; 2179da6c28aaSamw int error = 0; 2180ecd6cf80Smarks uint64_t links; 2181da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2182da6c28aaSamw xoptattr_t *xoap = NULL; 2183da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2184fa9e4066Sahrens 21853cb34c60Sahrens ZFS_ENTER(zfsvfs); 21863cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2187f18faf3fSek pzp = zp->z_phys; 2188fa9e4066Sahrens 2189da6c28aaSamw mutex_enter(&zp->z_lock); 2190da6c28aaSamw 2191da6c28aaSamw /* 2192da6c28aaSamw * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 2193da6c28aaSamw * Also, if we are the owner don't bother, since owner should 2194da6c28aaSamw * always be allowed to read basic attributes of file. 2195da6c28aaSamw */ 2196da6c28aaSamw if (!(pzp->zp_flags & ZFS_ACL_TRIVIAL) && 2197da6c28aaSamw (pzp->zp_uid != crgetuid(cr))) { 2198da6c28aaSamw if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0, 2199da6c28aaSamw skipaclchk, cr)) { 2200da6c28aaSamw mutex_exit(&zp->z_lock); 2201da6c28aaSamw ZFS_EXIT(zfsvfs); 2202da6c28aaSamw return (error); 2203da6c28aaSamw } 2204da6c28aaSamw } 2205da6c28aaSamw 2206fa9e4066Sahrens /* 2207fa9e4066Sahrens * Return all attributes. It's cheaper to provide the answer 2208fa9e4066Sahrens * than to determine whether we were asked the question. 2209fa9e4066Sahrens */ 2210fa9e4066Sahrens 2211fa9e4066Sahrens vap->va_type = vp->v_type; 2212fa9e4066Sahrens vap->va_mode = pzp->zp_mode & MODEMASK; 2213bda89588Sjp zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid); 2214fa9e4066Sahrens vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 2215fa9e4066Sahrens vap->va_nodeid = zp->z_id; 2216ecd6cf80Smarks if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp)) 2217ecd6cf80Smarks links = pzp->zp_links + 1; 2218ecd6cf80Smarks else 2219ecd6cf80Smarks links = pzp->zp_links; 2220ecd6cf80Smarks vap->va_nlink = MIN(links, UINT32_MAX); /* nlink_t limit! */ 2221fa9e4066Sahrens vap->va_size = pzp->zp_size; 222272fc53bcSmarks vap->va_rdev = vp->v_rdev; 2223fa9e4066Sahrens vap->va_seq = zp->z_seq; 2224fa9e4066Sahrens 2225fa9e4066Sahrens /* 2226da6c28aaSamw * Add in any requested optional attributes and the create time. 2227da6c28aaSamw * Also set the corresponding bits in the returned attribute bitmap. 2228fa9e4066Sahrens */ 2229da6c28aaSamw if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) { 2230da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 2231da6c28aaSamw xoap->xoa_archive = 2232da6c28aaSamw ((pzp->zp_flags & ZFS_ARCHIVE) != 0); 2233da6c28aaSamw XVA_SET_RTN(xvap, XAT_ARCHIVE); 2234da6c28aaSamw } 2235da6c28aaSamw 2236da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 2237da6c28aaSamw xoap->xoa_readonly = 2238da6c28aaSamw ((pzp->zp_flags & ZFS_READONLY) != 0); 2239da6c28aaSamw XVA_SET_RTN(xvap, XAT_READONLY); 2240da6c28aaSamw } 2241da6c28aaSamw 2242da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 2243da6c28aaSamw xoap->xoa_system = 2244da6c28aaSamw ((pzp->zp_flags & ZFS_SYSTEM) != 0); 2245da6c28aaSamw XVA_SET_RTN(xvap, XAT_SYSTEM); 2246da6c28aaSamw } 2247da6c28aaSamw 2248da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 2249da6c28aaSamw xoap->xoa_hidden = 2250da6c28aaSamw ((pzp->zp_flags & ZFS_HIDDEN) != 0); 2251da6c28aaSamw XVA_SET_RTN(xvap, XAT_HIDDEN); 2252da6c28aaSamw } 2253da6c28aaSamw 2254da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2255da6c28aaSamw xoap->xoa_nounlink = 2256da6c28aaSamw ((pzp->zp_flags & ZFS_NOUNLINK) != 0); 2257da6c28aaSamw XVA_SET_RTN(xvap, XAT_NOUNLINK); 2258da6c28aaSamw } 2259da6c28aaSamw 2260da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2261da6c28aaSamw xoap->xoa_immutable = 2262da6c28aaSamw ((pzp->zp_flags & ZFS_IMMUTABLE) != 0); 2263da6c28aaSamw XVA_SET_RTN(xvap, XAT_IMMUTABLE); 2264da6c28aaSamw } 2265da6c28aaSamw 2266da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2267da6c28aaSamw xoap->xoa_appendonly = 2268da6c28aaSamw ((pzp->zp_flags & ZFS_APPENDONLY) != 0); 2269da6c28aaSamw XVA_SET_RTN(xvap, XAT_APPENDONLY); 2270da6c28aaSamw } 2271da6c28aaSamw 2272da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2273da6c28aaSamw xoap->xoa_nodump = 2274da6c28aaSamw ((pzp->zp_flags & ZFS_NODUMP) != 0); 2275da6c28aaSamw XVA_SET_RTN(xvap, XAT_NODUMP); 2276da6c28aaSamw } 2277da6c28aaSamw 2278da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 2279da6c28aaSamw xoap->xoa_opaque = 2280da6c28aaSamw ((pzp->zp_flags & ZFS_OPAQUE) != 0); 2281da6c28aaSamw XVA_SET_RTN(xvap, XAT_OPAQUE); 2282da6c28aaSamw } 2283da6c28aaSamw 2284da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2285da6c28aaSamw xoap->xoa_av_quarantined = 2286da6c28aaSamw ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0); 2287da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 2288da6c28aaSamw } 2289da6c28aaSamw 2290da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2291da6c28aaSamw xoap->xoa_av_modified = 2292da6c28aaSamw ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0); 2293da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 2294da6c28aaSamw } 2295da6c28aaSamw 2296da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) && 2297da6c28aaSamw vp->v_type == VREG && 2298da6c28aaSamw (pzp->zp_flags & ZFS_BONUS_SCANSTAMP)) { 2299da6c28aaSamw size_t len; 2300da6c28aaSamw dmu_object_info_t doi; 2301da6c28aaSamw 2302da6c28aaSamw /* 2303da6c28aaSamw * Only VREG files have anti-virus scanstamps, so we 2304da6c28aaSamw * won't conflict with symlinks in the bonus buffer. 2305da6c28aaSamw */ 2306da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2307da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2308da6c28aaSamw sizeof (znode_phys_t); 2309da6c28aaSamw if (len <= doi.doi_bonus_size) { 2310da6c28aaSamw /* 2311da6c28aaSamw * pzp points to the start of the 2312da6c28aaSamw * znode_phys_t. pzp + 1 points to the 2313da6c28aaSamw * first byte after the znode_phys_t. 2314da6c28aaSamw */ 2315da6c28aaSamw (void) memcpy(xoap->xoa_av_scanstamp, 2316da6c28aaSamw pzp + 1, 2317da6c28aaSamw sizeof (xoap->xoa_av_scanstamp)); 2318da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); 2319da6c28aaSamw } 2320da6c28aaSamw } 2321da6c28aaSamw 2322da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 2323da6c28aaSamw ZFS_TIME_DECODE(&xoap->xoa_createtime, pzp->zp_crtime); 2324da6c28aaSamw XVA_SET_RTN(xvap, XAT_CREATETIME); 2325fa9e4066Sahrens } 2326fa9e4066Sahrens } 2327fa9e4066Sahrens 2328da6c28aaSamw ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime); 2329da6c28aaSamw ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime); 2330da6c28aaSamw ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime); 2331da6c28aaSamw 2332fa9e4066Sahrens mutex_exit(&zp->z_lock); 2333fa9e4066Sahrens 2334fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks); 2335fa9e4066Sahrens 2336fa9e4066Sahrens if (zp->z_blksz == 0) { 2337fa9e4066Sahrens /* 2338fa9e4066Sahrens * Block size hasn't been set; suggest maximal I/O transfers. 2339fa9e4066Sahrens */ 2340fa9e4066Sahrens vap->va_blksize = zfsvfs->z_max_blksz; 2341fa9e4066Sahrens } 2342fa9e4066Sahrens 2343fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2344fa9e4066Sahrens return (0); 2345fa9e4066Sahrens } 2346fa9e4066Sahrens 2347fa9e4066Sahrens /* 2348fa9e4066Sahrens * Set the file attributes to the values contained in the 2349fa9e4066Sahrens * vattr structure. 2350fa9e4066Sahrens * 2351fa9e4066Sahrens * IN: vp - vnode of file to be modified. 2352fa9e4066Sahrens * vap - new attribute values. 2353da6c28aaSamw * If AT_XVATTR set, then optional attrs are being set 2354fa9e4066Sahrens * flags - ATTR_UTIME set if non-default time values provided. 2355da6c28aaSamw * - ATTR_NOACLCHECK (CIFS context only). 2356fa9e4066Sahrens * cr - credentials of caller. 2357da6c28aaSamw * ct - caller context 2358fa9e4066Sahrens * 2359fa9e4066Sahrens * RETURN: 0 if success 2360fa9e4066Sahrens * error code if failure 2361fa9e4066Sahrens * 2362fa9e4066Sahrens * Timestamps: 2363fa9e4066Sahrens * vp - ctime updated, mtime updated if size changed. 2364fa9e4066Sahrens */ 2365fa9e4066Sahrens /* ARGSUSED */ 2366fa9e4066Sahrens static int 2367fa9e4066Sahrens zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2368fa9e4066Sahrens caller_context_t *ct) 2369fa9e4066Sahrens { 2370f18faf3fSek znode_t *zp = VTOZ(vp); 2371f18faf3fSek znode_phys_t *pzp; 2372fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2373f18faf3fSek zilog_t *zilog; 2374fa9e4066Sahrens dmu_tx_t *tx; 2375fa9e4066Sahrens vattr_t oldva; 23765730cc9aSmaybee uint_t mask = vap->va_mask; 23775730cc9aSmaybee uint_t saved_mask; 2378f92daba9Smarks int trim_mask = 0; 2379fa9e4066Sahrens uint64_t new_mode; 2380d2443e76Smarks znode_t *attrzp; 2381fa9e4066Sahrens int need_policy = FALSE; 2382fa9e4066Sahrens int err; 2383da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 2384da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2385da6c28aaSamw xoptattr_t *xoap; 23864c841f60Smarks zfs_acl_t *aclp = NULL; 2387da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2388fa9e4066Sahrens 2389fa9e4066Sahrens if (mask == 0) 2390fa9e4066Sahrens return (0); 2391fa9e4066Sahrens 2392fa9e4066Sahrens if (mask & AT_NOSET) 2393fa9e4066Sahrens return (EINVAL); 2394fa9e4066Sahrens 23953cb34c60Sahrens ZFS_ENTER(zfsvfs); 23963cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2397da6c28aaSamw 2398da6c28aaSamw pzp = zp->z_phys; 2399da6c28aaSamw zilog = zfsvfs->z_log; 2400da6c28aaSamw 2401da6c28aaSamw /* 2402da6c28aaSamw * Make sure that if we have ephemeral uid/gid or xvattr specified 2403da6c28aaSamw * that file system is at proper version level 2404da6c28aaSamw */ 2405da6c28aaSamw 2406da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 2407da6c28aaSamw (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 2408da6c28aaSamw ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) || 240902dcba3bStimh (mask & AT_XVATTR))) { 241002dcba3bStimh ZFS_EXIT(zfsvfs); 2411da6c28aaSamw return (EINVAL); 241202dcba3bStimh } 2413da6c28aaSamw 241402dcba3bStimh if (mask & AT_SIZE && vp->v_type == VDIR) { 241502dcba3bStimh ZFS_EXIT(zfsvfs); 2416fa9e4066Sahrens return (EISDIR); 241702dcba3bStimh } 2418fa9e4066Sahrens 241902dcba3bStimh if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) { 242002dcba3bStimh ZFS_EXIT(zfsvfs); 242184c5a155Smarks return (EINVAL); 242202dcba3bStimh } 242384c5a155Smarks 2424da6c28aaSamw /* 2425da6c28aaSamw * If this is an xvattr_t, then get a pointer to the structure of 2426da6c28aaSamw * optional attributes. If this is NULL, then we have a vattr_t. 2427da6c28aaSamw */ 2428da6c28aaSamw xoap = xva_getxoptattr(xvap); 2429da6c28aaSamw 2430da6c28aaSamw /* 2431da6c28aaSamw * Immutable files can only alter immutable bit and atime 2432da6c28aaSamw */ 2433da6c28aaSamw if ((pzp->zp_flags & ZFS_IMMUTABLE) && 2434da6c28aaSamw ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) || 243502dcba3bStimh ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { 243602dcba3bStimh ZFS_EXIT(zfsvfs); 2437da6c28aaSamw return (EPERM); 243802dcba3bStimh } 2439da6c28aaSamw 244002dcba3bStimh if ((mask & AT_SIZE) && (pzp->zp_flags & ZFS_READONLY)) { 244102dcba3bStimh ZFS_EXIT(zfsvfs); 2442da6c28aaSamw return (EPERM); 244302dcba3bStimh } 2444fa9e4066Sahrens 244593129341Smarks /* 244693129341Smarks * Verify timestamps doesn't overflow 32 bits. 244793129341Smarks * ZFS can handle large timestamps, but 32bit syscalls can't 244893129341Smarks * handle times greater than 2039. This check should be removed 244993129341Smarks * once large timestamps are fully supported. 245093129341Smarks */ 245193129341Smarks if (mask & (AT_ATIME | AT_MTIME)) { 245293129341Smarks if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || 245393129341Smarks ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { 245493129341Smarks ZFS_EXIT(zfsvfs); 245593129341Smarks return (EOVERFLOW); 245693129341Smarks } 245793129341Smarks } 245893129341Smarks 2459fa9e4066Sahrens top: 2460d2443e76Smarks attrzp = NULL; 2461fa9e4066Sahrens 2462fa9e4066Sahrens if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 2463fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2464fa9e4066Sahrens return (EROFS); 2465fa9e4066Sahrens } 2466fa9e4066Sahrens 2467fa9e4066Sahrens /* 2468fa9e4066Sahrens * First validate permissions 2469fa9e4066Sahrens */ 2470fa9e4066Sahrens 2471fa9e4066Sahrens if (mask & AT_SIZE) { 2472da6c28aaSamw err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr); 2473fa9e4066Sahrens if (err) { 2474fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2475fa9e4066Sahrens return (err); 2476fa9e4066Sahrens } 24775730cc9aSmaybee /* 24785730cc9aSmaybee * XXX - Note, we are not providing any open 24795730cc9aSmaybee * mode flags here (like FNDELAY), so we may 24805730cc9aSmaybee * block if there are locks present... this 24815730cc9aSmaybee * should be addressed in openat(). 24825730cc9aSmaybee */ 2483cdb0ab79Smaybee /* XXX - would it be OK to generate a log record here? */ 2484cdb0ab79Smaybee err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 24855730cc9aSmaybee if (err) { 24865730cc9aSmaybee ZFS_EXIT(zfsvfs); 24875730cc9aSmaybee return (err); 24885730cc9aSmaybee } 2489fa9e4066Sahrens } 2490fa9e4066Sahrens 2491da6c28aaSamw if (mask & (AT_ATIME|AT_MTIME) || 2492da6c28aaSamw ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || 2493da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_READONLY) || 2494da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || 2495da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_CREATETIME) || 2496da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) 2497da6c28aaSamw need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, 2498da6c28aaSamw skipaclchk, cr); 2499fa9e4066Sahrens 2500fa9e4066Sahrens if (mask & (AT_UID|AT_GID)) { 2501fa9e4066Sahrens int idmask = (mask & (AT_UID|AT_GID)); 2502fa9e4066Sahrens int take_owner; 2503fa9e4066Sahrens int take_group; 2504fa9e4066Sahrens 2505a933bc41Smarks /* 2506a933bc41Smarks * NOTE: even if a new mode is being set, 2507a933bc41Smarks * we may clear S_ISUID/S_ISGID bits. 2508a933bc41Smarks */ 2509a933bc41Smarks 2510a933bc41Smarks if (!(mask & AT_MODE)) 2511a933bc41Smarks vap->va_mode = pzp->zp_mode; 2512a933bc41Smarks 2513fa9e4066Sahrens /* 2514fa9e4066Sahrens * Take ownership or chgrp to group we are a member of 2515fa9e4066Sahrens */ 2516fa9e4066Sahrens 2517fa9e4066Sahrens take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 2518da6c28aaSamw take_group = (mask & AT_GID) && 2519da6c28aaSamw zfs_groupmember(zfsvfs, vap->va_gid, cr); 2520fa9e4066Sahrens 2521fa9e4066Sahrens /* 2522fa9e4066Sahrens * If both AT_UID and AT_GID are set then take_owner and 2523fa9e4066Sahrens * take_group must both be set in order to allow taking 2524fa9e4066Sahrens * ownership. 2525fa9e4066Sahrens * 2526fa9e4066Sahrens * Otherwise, send the check through secpolicy_vnode_setattr() 2527fa9e4066Sahrens * 2528fa9e4066Sahrens */ 2529fa9e4066Sahrens 2530fa9e4066Sahrens if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 2531fa9e4066Sahrens ((idmask == AT_UID) && take_owner) || 2532fa9e4066Sahrens ((idmask == AT_GID) && take_group)) { 2533da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, 2534da6c28aaSamw skipaclchk, cr) == 0) { 2535fa9e4066Sahrens /* 2536fa9e4066Sahrens * Remove setuid/setgid for non-privileged users 2537fa9e4066Sahrens */ 253813f9f30eSmarks secpolicy_setid_clear(vap, cr); 2539f92daba9Smarks trim_mask = (mask & (AT_UID|AT_GID)); 2540fa9e4066Sahrens } else { 2541fa9e4066Sahrens need_policy = TRUE; 2542fa9e4066Sahrens } 2543fa9e4066Sahrens } else { 2544fa9e4066Sahrens need_policy = TRUE; 2545fa9e4066Sahrens } 2546fa9e4066Sahrens } 2547fa9e4066Sahrens 2548f92daba9Smarks mutex_enter(&zp->z_lock); 2549f92daba9Smarks oldva.va_mode = pzp->zp_mode; 2550bda89588Sjp zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); 2551da6c28aaSamw if (mask & AT_XVATTR) { 2552da6c28aaSamw if ((need_policy == FALSE) && 2553da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_APPENDONLY) && 2554da6c28aaSamw xoap->xoa_appendonly != 2555da6c28aaSamw ((pzp->zp_flags & ZFS_APPENDONLY) != 0)) || 2556da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_NOUNLINK) && 2557da6c28aaSamw xoap->xoa_nounlink != 2558da6c28aaSamw ((pzp->zp_flags & ZFS_NOUNLINK) != 0)) || 2559da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE) && 2560da6c28aaSamw xoap->xoa_immutable != 2561da6c28aaSamw ((pzp->zp_flags & ZFS_IMMUTABLE) != 0)) || 2562da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_NODUMP) && 2563da6c28aaSamw xoap->xoa_nodump != 2564da6c28aaSamw ((pzp->zp_flags & ZFS_NODUMP) != 0)) || 2565da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED) && 2566da6c28aaSamw xoap->xoa_av_modified != 2567da6c28aaSamw ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0)) || 2568e8f97327Smarks ((XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED) && 2569e8f97327Smarks ((vp->v_type != VREG && xoap->xoa_av_quarantined) || 2570da6c28aaSamw xoap->xoa_av_quarantined != 2571e8f97327Smarks ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0)))) || 2572da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) || 2573da6c28aaSamw (XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { 2574da6c28aaSamw need_policy = TRUE; 2575da6c28aaSamw } 2576da6c28aaSamw } 2577da6c28aaSamw 2578f92daba9Smarks mutex_exit(&zp->z_lock); 2579fa9e4066Sahrens 2580f92daba9Smarks if (mask & AT_MODE) { 2581da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) { 2582f92daba9Smarks err = secpolicy_setid_setsticky_clear(vp, vap, 2583f92daba9Smarks &oldva, cr); 2584f92daba9Smarks if (err) { 2585f92daba9Smarks ZFS_EXIT(zfsvfs); 2586f92daba9Smarks return (err); 2587f92daba9Smarks } 2588f92daba9Smarks trim_mask |= AT_MODE; 2589f92daba9Smarks } else { 2590f92daba9Smarks need_policy = TRUE; 2591f92daba9Smarks } 2592f92daba9Smarks } 259313f9f30eSmarks 2594f92daba9Smarks if (need_policy) { 259513f9f30eSmarks /* 259613f9f30eSmarks * If trim_mask is set then take ownership 2597f92daba9Smarks * has been granted or write_acl is present and user 2598f92daba9Smarks * has the ability to modify mode. In that case remove 2599f92daba9Smarks * UID|GID and or MODE from mask so that 260013f9f30eSmarks * secpolicy_vnode_setattr() doesn't revoke it. 260113f9f30eSmarks */ 260213f9f30eSmarks 2603f92daba9Smarks if (trim_mask) { 2604f92daba9Smarks saved_mask = vap->va_mask; 2605f92daba9Smarks vap->va_mask &= ~trim_mask; 2606f92daba9Smarks } 2607fa9e4066Sahrens err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 2608da6c28aaSamw (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp); 2609fa9e4066Sahrens if (err) { 2610fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2611fa9e4066Sahrens return (err); 2612fa9e4066Sahrens } 261313f9f30eSmarks 261413f9f30eSmarks if (trim_mask) 2615f92daba9Smarks vap->va_mask |= saved_mask; 2616fa9e4066Sahrens } 2617fa9e4066Sahrens 2618fa9e4066Sahrens /* 2619fa9e4066Sahrens * secpolicy_vnode_setattr, or take ownership may have 2620fa9e4066Sahrens * changed va_mask 2621fa9e4066Sahrens */ 2622fa9e4066Sahrens mask = vap->va_mask; 2623fa9e4066Sahrens 2624fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2625fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 26264c841f60Smarks if (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 26274c841f60Smarks ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid))) { 26284c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 26294c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 26304c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 26314c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 26324c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); 26334c841f60Smarks } else { 26344c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 26354c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 26364c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 26374c841f60Smarks } 2638da6c28aaSamw } 2639fa9e4066Sahrens 2640fa9e4066Sahrens if (mask & AT_MODE) { 2641169cdae2Smarks uint64_t pmode = pzp->zp_mode; 2642fa9e4066Sahrens 2643169cdae2Smarks new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 2644fa9e4066Sahrens 26454c841f60Smarks if (err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)) { 26464c841f60Smarks dmu_tx_abort(tx); 26474c841f60Smarks ZFS_EXIT(zfsvfs); 26484c841f60Smarks return (err); 26494c841f60Smarks } 2650da6c28aaSamw if (pzp->zp_acl.z_acl_extern_obj) { 2651da6c28aaSamw /* Are we upgrading ACL from old V0 format to new V1 */ 2652da6c28aaSamw if (zfsvfs->z_version <= ZPL_VERSION_FUID && 2653da6c28aaSamw pzp->zp_acl.z_acl_version == 2654da6c28aaSamw ZFS_ACL_VERSION_INITIAL) { 2655da6c28aaSamw dmu_tx_hold_free(tx, 2656da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 2657da6c28aaSamw DMU_OBJECT_END); 2658da6c28aaSamw dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 26594c841f60Smarks 0, aclp->z_acl_bytes); 2660da6c28aaSamw } else { 2661da6c28aaSamw dmu_tx_hold_write(tx, 2662da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 26634c841f60Smarks aclp->z_acl_bytes); 26644c841f60Smarks } 26656d38e247Smarks } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) { 26666d38e247Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 26676d38e247Smarks 0, aclp->z_acl_bytes); 2668da6c28aaSamw } 2669fa9e4066Sahrens } 2670fa9e4066Sahrens 2671da6c28aaSamw if ((mask & (AT_UID | AT_GID)) && pzp->zp_xattr != 0) { 2672da6c28aaSamw err = zfs_zget(zp->z_zfsvfs, pzp->zp_xattr, &attrzp); 2673d2443e76Smarks if (err) { 2674d2443e76Smarks dmu_tx_abort(tx); 2675d2443e76Smarks ZFS_EXIT(zfsvfs); 26764c841f60Smarks if (aclp) 26774c841f60Smarks zfs_acl_free(aclp); 2678d2443e76Smarks return (err); 2679d2443e76Smarks } 2680d2443e76Smarks dmu_tx_hold_bonus(tx, attrzp->z_id); 2681d2443e76Smarks } 2682d2443e76Smarks 2683fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 2684fa9e4066Sahrens if (err) { 2685d2443e76Smarks if (attrzp) 2686d2443e76Smarks VN_RELE(ZTOV(attrzp)); 26874c841f60Smarks 26884c841f60Smarks if (aclp) { 26894c841f60Smarks zfs_acl_free(aclp); 26904c841f60Smarks aclp = NULL; 26914c841f60Smarks } 26924c841f60Smarks 2693fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 26948a2f1b91Sahrens dmu_tx_wait(tx); 26958a2f1b91Sahrens dmu_tx_abort(tx); 2696fa9e4066Sahrens goto top; 2697fa9e4066Sahrens } 26988a2f1b91Sahrens dmu_tx_abort(tx); 2699fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2700fa9e4066Sahrens return (err); 2701fa9e4066Sahrens } 2702fa9e4066Sahrens 2703fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 2704fa9e4066Sahrens 2705fa9e4066Sahrens /* 2706fa9e4066Sahrens * Set each attribute requested. 2707fa9e4066Sahrens * We group settings according to the locks they need to acquire. 2708fa9e4066Sahrens * 2709fa9e4066Sahrens * Note: you cannot set ctime directly, although it will be 2710fa9e4066Sahrens * updated as a side-effect of calling this function. 2711fa9e4066Sahrens */ 2712fa9e4066Sahrens 2713fa9e4066Sahrens mutex_enter(&zp->z_lock); 2714fa9e4066Sahrens 2715fa9e4066Sahrens if (mask & AT_MODE) { 27164c841f60Smarks mutex_enter(&zp->z_acl_lock); 27174c841f60Smarks zp->z_phys->zp_mode = new_mode; 27184c841f60Smarks err = zfs_aclset_common(zp, aclp, cr, &fuidp, tx); 2719fa9e4066Sahrens ASSERT3U(err, ==, 0); 27204c841f60Smarks mutex_exit(&zp->z_acl_lock); 2721fa9e4066Sahrens } 2722fa9e4066Sahrens 2723d2443e76Smarks if (attrzp) 2724d2443e76Smarks mutex_enter(&attrzp->z_lock); 2725d2443e76Smarks 2726d2443e76Smarks if (mask & AT_UID) { 2727da6c28aaSamw pzp->zp_uid = zfs_fuid_create(zfsvfs, 2728bda89588Sjp vap->va_uid, cr, ZFS_OWNER, tx, &fuidp); 2729d2443e76Smarks if (attrzp) { 2730da6c28aaSamw attrzp->z_phys->zp_uid = zfs_fuid_create(zfsvfs, 2731bda89588Sjp vap->va_uid, cr, ZFS_OWNER, tx, &fuidp); 2732d2443e76Smarks } 2733d2443e76Smarks } 2734fa9e4066Sahrens 2735d2443e76Smarks if (mask & AT_GID) { 2736da6c28aaSamw pzp->zp_gid = zfs_fuid_create(zfsvfs, vap->va_gid, 2737bda89588Sjp cr, ZFS_GROUP, tx, &fuidp); 2738d2443e76Smarks if (attrzp) 2739da6c28aaSamw attrzp->z_phys->zp_gid = zfs_fuid_create(zfsvfs, 2740bda89588Sjp vap->va_gid, cr, ZFS_GROUP, tx, &fuidp); 2741d2443e76Smarks } 2742d2443e76Smarks 27434c841f60Smarks if (aclp) 27444c841f60Smarks zfs_acl_free(aclp); 27454c841f60Smarks 2746d2443e76Smarks if (attrzp) 2747d2443e76Smarks mutex_exit(&attrzp->z_lock); 2748fa9e4066Sahrens 2749fa9e4066Sahrens if (mask & AT_ATIME) 2750fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 2751fa9e4066Sahrens 2752fa9e4066Sahrens if (mask & AT_MTIME) 2753fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 2754fa9e4066Sahrens 2755cdb0ab79Smaybee /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */ 27565730cc9aSmaybee if (mask & AT_SIZE) 2757fa9e4066Sahrens zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx); 27585730cc9aSmaybee else if (mask != 0) 2759fa9e4066Sahrens zfs_time_stamper_locked(zp, STATE_CHANGED, tx); 2760da6c28aaSamw /* 2761da6c28aaSamw * Do this after setting timestamps to prevent timestamp 2762da6c28aaSamw * update from toggling bit 2763da6c28aaSamw */ 2764da6c28aaSamw 2765da6c28aaSamw if (xoap && (mask & AT_XVATTR)) { 2766da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { 2767da6c28aaSamw size_t len; 2768da6c28aaSamw dmu_object_info_t doi; 2769da6c28aaSamw 2770da6c28aaSamw ASSERT(vp->v_type == VREG); 2771da6c28aaSamw 2772da6c28aaSamw /* Grow the bonus buffer if necessary. */ 2773da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2774da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2775da6c28aaSamw sizeof (znode_phys_t); 2776da6c28aaSamw if (len > doi.doi_bonus_size) 2777da6c28aaSamw VERIFY(dmu_set_bonus(zp->z_dbuf, len, tx) == 0); 2778da6c28aaSamw } 2779da6c28aaSamw zfs_xvattr_set(zp, xvap); 2780da6c28aaSamw } 2781fa9e4066Sahrens 27825730cc9aSmaybee if (mask != 0) 2783da6c28aaSamw zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp); 2784fa9e4066Sahrens 2785da6c28aaSamw if (fuidp) 2786da6c28aaSamw zfs_fuid_info_free(fuidp); 2787fa9e4066Sahrens mutex_exit(&zp->z_lock); 2788fa9e4066Sahrens 2789d2443e76Smarks if (attrzp) 2790d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2791d2443e76Smarks 2792fa9e4066Sahrens dmu_tx_commit(tx); 2793fa9e4066Sahrens 2794fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2795fa9e4066Sahrens return (err); 2796fa9e4066Sahrens } 2797fa9e4066Sahrens 2798fa9e4066Sahrens typedef struct zfs_zlock { 2799fa9e4066Sahrens krwlock_t *zl_rwlock; /* lock we acquired */ 2800fa9e4066Sahrens znode_t *zl_znode; /* znode we held */ 2801fa9e4066Sahrens struct zfs_zlock *zl_next; /* next in list */ 2802fa9e4066Sahrens } zfs_zlock_t; 2803fa9e4066Sahrens 2804ff008e00Smaybee /* 2805ff008e00Smaybee * Drop locks and release vnodes that were held by zfs_rename_lock(). 2806ff008e00Smaybee */ 2807ff008e00Smaybee static void 2808ff008e00Smaybee zfs_rename_unlock(zfs_zlock_t **zlpp) 2809ff008e00Smaybee { 2810ff008e00Smaybee zfs_zlock_t *zl; 2811ff008e00Smaybee 2812ff008e00Smaybee while ((zl = *zlpp) != NULL) { 2813ff008e00Smaybee if (zl->zl_znode != NULL) 2814ff008e00Smaybee VN_RELE(ZTOV(zl->zl_znode)); 2815ff008e00Smaybee rw_exit(zl->zl_rwlock); 2816ff008e00Smaybee *zlpp = zl->zl_next; 2817ff008e00Smaybee kmem_free(zl, sizeof (*zl)); 2818ff008e00Smaybee } 2819ff008e00Smaybee } 2820ff008e00Smaybee 2821ff008e00Smaybee /* 2822ff008e00Smaybee * Search back through the directory tree, using the ".." entries. 2823ff008e00Smaybee * Lock each directory in the chain to prevent concurrent renames. 2824ff008e00Smaybee * Fail any attempt to move a directory into one of its own descendants. 2825ff008e00Smaybee * XXX - z_parent_lock can overlap with map or grow locks 2826ff008e00Smaybee */ 2827fa9e4066Sahrens static int 2828fa9e4066Sahrens zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 2829fa9e4066Sahrens { 2830fa9e4066Sahrens zfs_zlock_t *zl; 2831feb08c6bSbillm znode_t *zp = tdzp; 2832fa9e4066Sahrens uint64_t rootid = zp->z_zfsvfs->z_root; 2833fa9e4066Sahrens uint64_t *oidp = &zp->z_id; 2834fa9e4066Sahrens krwlock_t *rwlp = &szp->z_parent_lock; 2835fa9e4066Sahrens krw_t rw = RW_WRITER; 2836fa9e4066Sahrens 2837fa9e4066Sahrens /* 2838fa9e4066Sahrens * First pass write-locks szp and compares to zp->z_id. 2839fa9e4066Sahrens * Later passes read-lock zp and compare to zp->z_parent. 2840fa9e4066Sahrens */ 2841fa9e4066Sahrens do { 2842ff008e00Smaybee if (!rw_tryenter(rwlp, rw)) { 2843ff008e00Smaybee /* 2844ff008e00Smaybee * Another thread is renaming in this path. 2845ff008e00Smaybee * Note that if we are a WRITER, we don't have any 2846ff008e00Smaybee * parent_locks held yet. 2847ff008e00Smaybee */ 2848ff008e00Smaybee if (rw == RW_READER && zp->z_id > szp->z_id) { 2849ff008e00Smaybee /* 2850ff008e00Smaybee * Drop our locks and restart 2851ff008e00Smaybee */ 2852ff008e00Smaybee zfs_rename_unlock(&zl); 2853ff008e00Smaybee *zlpp = NULL; 2854ff008e00Smaybee zp = tdzp; 2855ff008e00Smaybee oidp = &zp->z_id; 2856ff008e00Smaybee rwlp = &szp->z_parent_lock; 2857ff008e00Smaybee rw = RW_WRITER; 2858ff008e00Smaybee continue; 2859ff008e00Smaybee } else { 2860ff008e00Smaybee /* 2861ff008e00Smaybee * Wait for other thread to drop its locks 2862ff008e00Smaybee */ 2863ff008e00Smaybee rw_enter(rwlp, rw); 2864ff008e00Smaybee } 2865ff008e00Smaybee } 2866ff008e00Smaybee 2867fa9e4066Sahrens zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 2868fa9e4066Sahrens zl->zl_rwlock = rwlp; 2869fa9e4066Sahrens zl->zl_znode = NULL; 2870fa9e4066Sahrens zl->zl_next = *zlpp; 2871fa9e4066Sahrens *zlpp = zl; 2872fa9e4066Sahrens 2873fa9e4066Sahrens if (*oidp == szp->z_id) /* We're a descendant of szp */ 2874fa9e4066Sahrens return (EINVAL); 2875fa9e4066Sahrens 2876fa9e4066Sahrens if (*oidp == rootid) /* We've hit the top */ 2877fa9e4066Sahrens return (0); 2878fa9e4066Sahrens 2879fa9e4066Sahrens if (rw == RW_READER) { /* i.e. not the first pass */ 2880fa9e4066Sahrens int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp); 2881fa9e4066Sahrens if (error) 2882fa9e4066Sahrens return (error); 2883fa9e4066Sahrens zl->zl_znode = zp; 2884fa9e4066Sahrens } 2885fa9e4066Sahrens oidp = &zp->z_phys->zp_parent; 2886fa9e4066Sahrens rwlp = &zp->z_parent_lock; 2887fa9e4066Sahrens rw = RW_READER; 2888fa9e4066Sahrens 2889fa9e4066Sahrens } while (zp->z_id != sdzp->z_id); 2890fa9e4066Sahrens 2891fa9e4066Sahrens return (0); 2892fa9e4066Sahrens } 2893fa9e4066Sahrens 2894fa9e4066Sahrens /* 2895fa9e4066Sahrens * Move an entry from the provided source directory to the target 2896fa9e4066Sahrens * directory. Change the entry name as indicated. 2897fa9e4066Sahrens * 2898fa9e4066Sahrens * IN: sdvp - Source directory containing the "old entry". 2899fa9e4066Sahrens * snm - Old entry name. 2900fa9e4066Sahrens * tdvp - Target directory to contain the "new entry". 2901fa9e4066Sahrens * tnm - New entry name. 2902fa9e4066Sahrens * cr - credentials of caller. 2903da6c28aaSamw * ct - caller context 2904da6c28aaSamw * flags - case flags 2905fa9e4066Sahrens * 2906fa9e4066Sahrens * RETURN: 0 if success 2907fa9e4066Sahrens * error code if failure 2908fa9e4066Sahrens * 2909fa9e4066Sahrens * Timestamps: 2910fa9e4066Sahrens * sdvp,tdvp - ctime|mtime updated 2911fa9e4066Sahrens */ 2912da6c28aaSamw /*ARGSUSED*/ 2913fa9e4066Sahrens static int 2914da6c28aaSamw zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr, 2915da6c28aaSamw caller_context_t *ct, int flags) 2916fa9e4066Sahrens { 2917fa9e4066Sahrens znode_t *tdzp, *szp, *tzp; 2918fa9e4066Sahrens znode_t *sdzp = VTOZ(sdvp); 2919fa9e4066Sahrens zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 2920f18faf3fSek zilog_t *zilog; 2921fa9e4066Sahrens vnode_t *realvp; 2922fa9e4066Sahrens zfs_dirlock_t *sdl, *tdl; 2923fa9e4066Sahrens dmu_tx_t *tx; 2924fa9e4066Sahrens zfs_zlock_t *zl; 2925da6c28aaSamw int cmp, serr, terr; 2926da6c28aaSamw int error = 0; 2927da6c28aaSamw int zflg = 0; 2928fa9e4066Sahrens 29293cb34c60Sahrens ZFS_ENTER(zfsvfs); 29303cb34c60Sahrens ZFS_VERIFY_ZP(sdzp); 2931f18faf3fSek zilog = zfsvfs->z_log; 2932fa9e4066Sahrens 2933fa9e4066Sahrens /* 2934fa9e4066Sahrens * Make sure we have the real vp for the target directory. 2935fa9e4066Sahrens */ 2936da6c28aaSamw if (VOP_REALVP(tdvp, &realvp, ct) == 0) 2937fa9e4066Sahrens tdvp = realvp; 2938fa9e4066Sahrens 2939fa9e4066Sahrens if (tdvp->v_vfsp != sdvp->v_vfsp) { 2940fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2941fa9e4066Sahrens return (EXDEV); 2942fa9e4066Sahrens } 2943fa9e4066Sahrens 2944fa9e4066Sahrens tdzp = VTOZ(tdvp); 29453cb34c60Sahrens ZFS_VERIFY_ZP(tdzp); 2946de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(tnm, 2947da6c28aaSamw strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 2948da6c28aaSamw ZFS_EXIT(zfsvfs); 2949da6c28aaSamw return (EILSEQ); 2950da6c28aaSamw } 2951da6c28aaSamw 2952da6c28aaSamw if (flags & FIGNORECASE) 2953da6c28aaSamw zflg |= ZCILOOK; 2954da6c28aaSamw 2955fa9e4066Sahrens top: 2956fa9e4066Sahrens szp = NULL; 2957fa9e4066Sahrens tzp = NULL; 2958fa9e4066Sahrens zl = NULL; 2959fa9e4066Sahrens 2960fa9e4066Sahrens /* 2961fa9e4066Sahrens * This is to prevent the creation of links into attribute space 2962fa9e4066Sahrens * by renaming a linked file into/outof an attribute directory. 2963fa9e4066Sahrens * See the comment in zfs_link() for why this is considered bad. 2964fa9e4066Sahrens */ 2965fa9e4066Sahrens if ((tdzp->z_phys->zp_flags & ZFS_XATTR) != 2966fa9e4066Sahrens (sdzp->z_phys->zp_flags & ZFS_XATTR)) { 2967fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2968fa9e4066Sahrens return (EINVAL); 2969fa9e4066Sahrens } 2970fa9e4066Sahrens 2971fa9e4066Sahrens /* 2972fa9e4066Sahrens * Lock source and target directory entries. To prevent deadlock, 2973fa9e4066Sahrens * a lock ordering must be defined. We lock the directory with 2974fa9e4066Sahrens * the smallest object id first, or if it's a tie, the one with 2975fa9e4066Sahrens * the lexically first name. 2976fa9e4066Sahrens */ 2977fa9e4066Sahrens if (sdzp->z_id < tdzp->z_id) { 2978fa9e4066Sahrens cmp = -1; 2979fa9e4066Sahrens } else if (sdzp->z_id > tdzp->z_id) { 2980fa9e4066Sahrens cmp = 1; 2981fa9e4066Sahrens } else { 2982da6c28aaSamw /* 2983da6c28aaSamw * First compare the two name arguments without 2984da6c28aaSamw * considering any case folding. 2985da6c28aaSamw */ 2986da6c28aaSamw int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER); 2987da6c28aaSamw 2988da6c28aaSamw cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error); 2989de8267e0Stimh ASSERT(error == 0 || !zfsvfs->z_utf8); 2990fa9e4066Sahrens if (cmp == 0) { 2991fa9e4066Sahrens /* 2992fa9e4066Sahrens * POSIX: "If the old argument and the new argument 2993fa9e4066Sahrens * both refer to links to the same existing file, 2994fa9e4066Sahrens * the rename() function shall return successfully 2995fa9e4066Sahrens * and perform no other action." 2996fa9e4066Sahrens */ 2997fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2998fa9e4066Sahrens return (0); 2999fa9e4066Sahrens } 3000da6c28aaSamw /* 3001da6c28aaSamw * If the file system is case-folding, then we may 3002da6c28aaSamw * have some more checking to do. A case-folding file 3003da6c28aaSamw * system is either supporting mixed case sensitivity 3004da6c28aaSamw * access or is completely case-insensitive. Note 3005da6c28aaSamw * that the file system is always case preserving. 3006da6c28aaSamw * 3007da6c28aaSamw * In mixed sensitivity mode case sensitive behavior 3008da6c28aaSamw * is the default. FIGNORECASE must be used to 3009da6c28aaSamw * explicitly request case insensitive behavior. 3010da6c28aaSamw * 3011da6c28aaSamw * If the source and target names provided differ only 3012da6c28aaSamw * by case (e.g., a request to rename 'tim' to 'Tim'), 3013da6c28aaSamw * we will treat this as a special case in the 3014da6c28aaSamw * case-insensitive mode: as long as the source name 3015da6c28aaSamw * is an exact match, we will allow this to proceed as 3016da6c28aaSamw * a name-change request. 3017da6c28aaSamw */ 3018de8267e0Stimh if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 3019de8267e0Stimh (zfsvfs->z_case == ZFS_CASE_MIXED && 3020de8267e0Stimh flags & FIGNORECASE)) && 3021da6c28aaSamw u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST, 3022da6c28aaSamw &error) == 0) { 3023da6c28aaSamw /* 3024da6c28aaSamw * case preserving rename request, require exact 3025da6c28aaSamw * name matches 3026da6c28aaSamw */ 3027da6c28aaSamw zflg |= ZCIEXACT; 3028da6c28aaSamw zflg &= ~ZCILOOK; 3029da6c28aaSamw } 3030fa9e4066Sahrens } 3031da6c28aaSamw 3032fa9e4066Sahrens if (cmp < 0) { 3033da6c28aaSamw serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, 3034da6c28aaSamw ZEXISTS | zflg, NULL, NULL); 3035da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3036da6c28aaSamw tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL); 3037fa9e4066Sahrens } else { 3038da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3039da6c28aaSamw tdzp, tnm, &tzp, zflg, NULL, NULL); 3040da6c28aaSamw serr = zfs_dirent_lock(&sdl, 3041da6c28aaSamw sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg, 3042da6c28aaSamw NULL, NULL); 3043fa9e4066Sahrens } 3044fa9e4066Sahrens 3045fa9e4066Sahrens if (serr) { 3046fa9e4066Sahrens /* 3047fa9e4066Sahrens * Source entry invalid or not there. 3048fa9e4066Sahrens */ 3049fa9e4066Sahrens if (!terr) { 3050fa9e4066Sahrens zfs_dirent_unlock(tdl); 3051fa9e4066Sahrens if (tzp) 3052fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3053fa9e4066Sahrens } 3054fa9e4066Sahrens if (strcmp(snm, "..") == 0) 3055fa9e4066Sahrens serr = EINVAL; 3056fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3057fa9e4066Sahrens return (serr); 3058fa9e4066Sahrens } 3059fa9e4066Sahrens if (terr) { 3060fa9e4066Sahrens zfs_dirent_unlock(sdl); 3061fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3062fa9e4066Sahrens if (strcmp(tnm, "..") == 0) 3063fa9e4066Sahrens terr = EINVAL; 3064fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3065fa9e4066Sahrens return (terr); 3066fa9e4066Sahrens } 3067fa9e4066Sahrens 3068fa9e4066Sahrens /* 3069fa9e4066Sahrens * Must have write access at the source to remove the old entry 3070fa9e4066Sahrens * and write access at the target to create the new entry. 3071fa9e4066Sahrens * Note that if target and source are the same, this can be 3072fa9e4066Sahrens * done in a single check. 3073fa9e4066Sahrens */ 3074fa9e4066Sahrens 3075fa9e4066Sahrens if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 3076fa9e4066Sahrens goto out; 3077fa9e4066Sahrens 3078fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3079fa9e4066Sahrens /* 3080fa9e4066Sahrens * Check to make sure rename is valid. 3081fa9e4066Sahrens * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 3082fa9e4066Sahrens */ 3083fa9e4066Sahrens if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 3084fa9e4066Sahrens goto out; 3085fa9e4066Sahrens } 3086fa9e4066Sahrens 3087fa9e4066Sahrens /* 3088fa9e4066Sahrens * Does target exist? 3089fa9e4066Sahrens */ 3090fa9e4066Sahrens if (tzp) { 3091fa9e4066Sahrens /* 3092fa9e4066Sahrens * Source and target must be the same type. 3093fa9e4066Sahrens */ 3094fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3095fa9e4066Sahrens if (ZTOV(tzp)->v_type != VDIR) { 3096fa9e4066Sahrens error = ENOTDIR; 3097fa9e4066Sahrens goto out; 3098fa9e4066Sahrens } 3099fa9e4066Sahrens } else { 3100fa9e4066Sahrens if (ZTOV(tzp)->v_type == VDIR) { 3101fa9e4066Sahrens error = EISDIR; 3102fa9e4066Sahrens goto out; 3103fa9e4066Sahrens } 3104fa9e4066Sahrens } 3105fa9e4066Sahrens /* 3106fa9e4066Sahrens * POSIX dictates that when the source and target 3107fa9e4066Sahrens * entries refer to the same file object, rename 3108fa9e4066Sahrens * must do nothing and exit without error. 3109fa9e4066Sahrens */ 3110fa9e4066Sahrens if (szp->z_id == tzp->z_id) { 3111fa9e4066Sahrens error = 0; 3112fa9e4066Sahrens goto out; 3113fa9e4066Sahrens } 3114fa9e4066Sahrens } 3115fa9e4066Sahrens 3116da6c28aaSamw vnevent_rename_src(ZTOV(szp), sdvp, snm, ct); 3117fa9e4066Sahrens if (tzp) 3118da6c28aaSamw vnevent_rename_dest(ZTOV(tzp), tdvp, tnm, ct); 3119df2381bfSpraks 3120df2381bfSpraks /* 3121df2381bfSpraks * notify the target directory if it is not the same 3122df2381bfSpraks * as source directory. 3123df2381bfSpraks */ 3124df2381bfSpraks if (tdvp != sdvp) { 3125da6c28aaSamw vnevent_rename_dest_dir(tdvp, ct); 3126df2381bfSpraks } 3127fa9e4066Sahrens 3128fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3129fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */ 3130fa9e4066Sahrens dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */ 3131ea8dc4b6Seschrock dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); 3132ea8dc4b6Seschrock dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); 3133ea8dc4b6Seschrock if (sdzp != tdzp) 3134fa9e4066Sahrens dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */ 3135ea8dc4b6Seschrock if (tzp) 3136ea8dc4b6Seschrock dmu_tx_hold_bonus(tx, tzp->z_id); /* parent changes */ 3137893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 3138fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 3139fa9e4066Sahrens if (error) { 3140fa9e4066Sahrens if (zl != NULL) 3141fa9e4066Sahrens zfs_rename_unlock(&zl); 3142fa9e4066Sahrens zfs_dirent_unlock(sdl); 3143fa9e4066Sahrens zfs_dirent_unlock(tdl); 3144fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3145fa9e4066Sahrens if (tzp) 3146fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3147fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 31488a2f1b91Sahrens dmu_tx_wait(tx); 31498a2f1b91Sahrens dmu_tx_abort(tx); 3150fa9e4066Sahrens goto top; 3151fa9e4066Sahrens } 31528a2f1b91Sahrens dmu_tx_abort(tx); 3153fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3154fa9e4066Sahrens return (error); 3155fa9e4066Sahrens } 3156fa9e4066Sahrens 3157fa9e4066Sahrens if (tzp) /* Attempt to remove the existing target */ 3158da6c28aaSamw error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL); 3159fa9e4066Sahrens 3160fa9e4066Sahrens if (error == 0) { 3161fa9e4066Sahrens error = zfs_link_create(tdl, szp, tx, ZRENAMING); 3162fa9e4066Sahrens if (error == 0) { 3163da6c28aaSamw szp->z_phys->zp_flags |= ZFS_AV_MODIFIED; 3164da6c28aaSamw 3165fa9e4066Sahrens error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 3166fa9e4066Sahrens ASSERT(error == 0); 3167da6c28aaSamw 3168da6c28aaSamw zfs_log_rename(zilog, tx, 3169da6c28aaSamw TX_RENAME | (flags & FIGNORECASE ? TX_CI : 0), 3170da6c28aaSamw sdzp, sdl->dl_name, tdzp, tdl->dl_name, szp); 317151ece835Seschrock 317251ece835Seschrock /* Update path information for the target vnode */ 317351ece835Seschrock vn_renamepath(tdvp, ZTOV(szp), tnm, strlen(tnm)); 3174fa9e4066Sahrens } 3175fa9e4066Sahrens } 3176fa9e4066Sahrens 3177fa9e4066Sahrens dmu_tx_commit(tx); 3178fa9e4066Sahrens out: 3179fa9e4066Sahrens if (zl != NULL) 3180fa9e4066Sahrens zfs_rename_unlock(&zl); 3181fa9e4066Sahrens 3182fa9e4066Sahrens zfs_dirent_unlock(sdl); 3183fa9e4066Sahrens zfs_dirent_unlock(tdl); 3184fa9e4066Sahrens 3185fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3186fa9e4066Sahrens if (tzp) 3187fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3188fa9e4066Sahrens 3189fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3190fa9e4066Sahrens return (error); 3191fa9e4066Sahrens } 3192fa9e4066Sahrens 3193fa9e4066Sahrens /* 3194fa9e4066Sahrens * Insert the indicated symbolic reference entry into the directory. 3195fa9e4066Sahrens * 3196fa9e4066Sahrens * IN: dvp - Directory to contain new symbolic link. 3197fa9e4066Sahrens * link - Name for new symlink entry. 3198fa9e4066Sahrens * vap - Attributes of new entry. 3199fa9e4066Sahrens * target - Target path of new symlink. 3200fa9e4066Sahrens * cr - credentials of caller. 3201da6c28aaSamw * ct - caller context 3202da6c28aaSamw * flags - case flags 3203fa9e4066Sahrens * 3204fa9e4066Sahrens * RETURN: 0 if success 3205fa9e4066Sahrens * error code if failure 3206fa9e4066Sahrens * 3207fa9e4066Sahrens * Timestamps: 3208fa9e4066Sahrens * dvp - ctime|mtime updated 3209fa9e4066Sahrens */ 3210da6c28aaSamw /*ARGSUSED*/ 3211fa9e4066Sahrens static int 3212da6c28aaSamw zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr, 3213da6c28aaSamw caller_context_t *ct, int flags) 3214fa9e4066Sahrens { 3215fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 3216fa9e4066Sahrens zfs_dirlock_t *dl; 3217fa9e4066Sahrens dmu_tx_t *tx; 3218fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3219f18faf3fSek zilog_t *zilog; 3220fa9e4066Sahrens int len = strlen(link); 3221fa9e4066Sahrens int error; 3222da6c28aaSamw int zflg = ZNEW; 3223da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 3224fa9e4066Sahrens 3225fa9e4066Sahrens ASSERT(vap->va_type == VLNK); 3226fa9e4066Sahrens 32273cb34c60Sahrens ZFS_ENTER(zfsvfs); 32283cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3229f18faf3fSek zilog = zfsvfs->z_log; 3230da6c28aaSamw 3231de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 3232da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3233da6c28aaSamw ZFS_EXIT(zfsvfs); 3234da6c28aaSamw return (EILSEQ); 3235da6c28aaSamw } 3236da6c28aaSamw if (flags & FIGNORECASE) 3237da6c28aaSamw zflg |= ZCILOOK; 3238fa9e4066Sahrens top: 3239da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3240fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3241fa9e4066Sahrens return (error); 3242fa9e4066Sahrens } 3243fa9e4066Sahrens 3244fa9e4066Sahrens if (len > MAXPATHLEN) { 3245fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3246fa9e4066Sahrens return (ENAMETOOLONG); 3247fa9e4066Sahrens } 3248fa9e4066Sahrens 3249fa9e4066Sahrens /* 3250fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3251fa9e4066Sahrens */ 3252da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL); 3253da6c28aaSamw if (error) { 3254fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3255fa9e4066Sahrens return (error); 3256fa9e4066Sahrens } 3257fa9e4066Sahrens 3258fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3259fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 3260fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 3261ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 3262fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 3263fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE); 32644c841f60Smarks if (IS_EPHEMERAL(crgetuid(cr)) || IS_EPHEMERAL(crgetgid(cr))) { 32654c841f60Smarks if (zfsvfs->z_fuid_obj == 0) { 32664c841f60Smarks dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 32674c841f60Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 32684c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 32694c841f60Smarks dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); 32704c841f60Smarks } else { 32714c841f60Smarks dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 32724c841f60Smarks dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 32734c841f60Smarks FUID_SIZE_ESTIMATE(zfsvfs)); 32744c841f60Smarks } 3275da6c28aaSamw } 3276fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 3277fa9e4066Sahrens if (error) { 3278fa9e4066Sahrens zfs_dirent_unlock(dl); 3279fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 32808a2f1b91Sahrens dmu_tx_wait(tx); 32818a2f1b91Sahrens dmu_tx_abort(tx); 3282fa9e4066Sahrens goto top; 3283fa9e4066Sahrens } 32848a2f1b91Sahrens dmu_tx_abort(tx); 3285fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3286fa9e4066Sahrens return (error); 3287fa9e4066Sahrens } 3288fa9e4066Sahrens 3289fa9e4066Sahrens dmu_buf_will_dirty(dzp->z_dbuf, tx); 3290fa9e4066Sahrens 3291fa9e4066Sahrens /* 3292fa9e4066Sahrens * Create a new object for the symlink. 3293fa9e4066Sahrens * Put the link content into bonus buffer if it will fit; 3294fa9e4066Sahrens * otherwise, store it just like any other file data. 3295fa9e4066Sahrens */ 3296fa9e4066Sahrens if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) { 32974ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, len, NULL, &fuidp); 3298fa9e4066Sahrens if (len != 0) 3299fa9e4066Sahrens bcopy(link, zp->z_phys + 1, len); 3300fa9e4066Sahrens } else { 3301fa9e4066Sahrens dmu_buf_t *dbp; 3302104e2ed7Sperrin 33034ccbb6e7Sahrens zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, NULL, &fuidp); 3304104e2ed7Sperrin /* 3305104e2ed7Sperrin * Nothing can access the znode yet so no locking needed 3306104e2ed7Sperrin * for growing the znode's blocksize. 3307104e2ed7Sperrin */ 3308104e2ed7Sperrin zfs_grow_blocksize(zp, len, tx); 3309fa9e4066Sahrens 33104ccbb6e7Sahrens VERIFY(0 == dmu_buf_hold(zfsvfs->z_os, 33114ccbb6e7Sahrens zp->z_id, 0, FTAG, &dbp)); 3312fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 3313fa9e4066Sahrens 3314fa9e4066Sahrens ASSERT3U(len, <=, dbp->db_size); 3315fa9e4066Sahrens bcopy(link, dbp->db_data, len); 3316ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3317fa9e4066Sahrens } 3318fa9e4066Sahrens zp->z_phys->zp_size = len; 3319fa9e4066Sahrens 3320fa9e4066Sahrens /* 3321fa9e4066Sahrens * Insert the new object into the directory. 3322fa9e4066Sahrens */ 3323fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 3324fa9e4066Sahrens out: 3325da6c28aaSamw if (error == 0) { 3326da6c28aaSamw uint64_t txtype = TX_SYMLINK; 3327da6c28aaSamw if (flags & FIGNORECASE) 3328da6c28aaSamw txtype |= TX_CI; 3329da6c28aaSamw zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link); 3330da6c28aaSamw } 3331da6c28aaSamw if (fuidp) 3332da6c28aaSamw zfs_fuid_info_free(fuidp); 3333fa9e4066Sahrens 3334fa9e4066Sahrens dmu_tx_commit(tx); 3335fa9e4066Sahrens 3336fa9e4066Sahrens zfs_dirent_unlock(dl); 3337fa9e4066Sahrens 3338fa9e4066Sahrens VN_RELE(ZTOV(zp)); 3339fa9e4066Sahrens 3340fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3341fa9e4066Sahrens return (error); 3342fa9e4066Sahrens } 3343fa9e4066Sahrens 3344fa9e4066Sahrens /* 3345fa9e4066Sahrens * Return, in the buffer contained in the provided uio structure, 3346fa9e4066Sahrens * the symbolic path referred to by vp. 3347fa9e4066Sahrens * 3348fa9e4066Sahrens * IN: vp - vnode of symbolic link. 3349fa9e4066Sahrens * uoip - structure to contain the link path. 3350fa9e4066Sahrens * cr - credentials of caller. 3351da6c28aaSamw * ct - caller context 3352fa9e4066Sahrens * 3353fa9e4066Sahrens * OUT: uio - structure to contain the link path. 3354fa9e4066Sahrens * 3355fa9e4066Sahrens * RETURN: 0 if success 3356fa9e4066Sahrens * error code if failure 3357fa9e4066Sahrens * 3358fa9e4066Sahrens * Timestamps: 3359fa9e4066Sahrens * vp - atime updated 3360fa9e4066Sahrens */ 3361fa9e4066Sahrens /* ARGSUSED */ 3362fa9e4066Sahrens static int 3363da6c28aaSamw zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct) 3364fa9e4066Sahrens { 3365fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3366fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3367fa9e4066Sahrens size_t bufsz; 3368fa9e4066Sahrens int error; 3369fa9e4066Sahrens 33703cb34c60Sahrens ZFS_ENTER(zfsvfs); 33713cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3372fa9e4066Sahrens 3373fa9e4066Sahrens bufsz = (size_t)zp->z_phys->zp_size; 3374fa9e4066Sahrens if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) { 3375fa9e4066Sahrens error = uiomove(zp->z_phys + 1, 3376fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3377fa9e4066Sahrens } else { 3378ea8dc4b6Seschrock dmu_buf_t *dbp; 3379ea8dc4b6Seschrock error = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0, FTAG, &dbp); 3380ea8dc4b6Seschrock if (error) { 3381fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3382fa9e4066Sahrens return (error); 3383fa9e4066Sahrens } 3384fa9e4066Sahrens error = uiomove(dbp->db_data, 3385fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3386ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3387fa9e4066Sahrens } 3388fa9e4066Sahrens 3389fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 3390fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3391fa9e4066Sahrens return (error); 3392fa9e4066Sahrens } 3393fa9e4066Sahrens 3394fa9e4066Sahrens /* 3395fa9e4066Sahrens * Insert a new entry into directory tdvp referencing svp. 3396fa9e4066Sahrens * 3397fa9e4066Sahrens * IN: tdvp - Directory to contain new entry. 3398fa9e4066Sahrens * svp - vnode of new entry. 3399fa9e4066Sahrens * name - name of new entry. 3400fa9e4066Sahrens * cr - credentials of caller. 3401da6c28aaSamw * ct - caller context 3402fa9e4066Sahrens * 3403fa9e4066Sahrens * RETURN: 0 if success 3404fa9e4066Sahrens * error code if failure 3405fa9e4066Sahrens * 3406fa9e4066Sahrens * Timestamps: 3407fa9e4066Sahrens * tdvp - ctime|mtime updated 3408fa9e4066Sahrens * svp - ctime updated 3409fa9e4066Sahrens */ 3410fa9e4066Sahrens /* ARGSUSED */ 3411fa9e4066Sahrens static int 3412da6c28aaSamw zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr, 3413da6c28aaSamw caller_context_t *ct, int flags) 3414fa9e4066Sahrens { 3415fa9e4066Sahrens znode_t *dzp = VTOZ(tdvp); 3416fa9e4066Sahrens znode_t *tzp, *szp; 3417fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3418f18faf3fSek zilog_t *zilog; 3419fa9e4066Sahrens zfs_dirlock_t *dl; 3420fa9e4066Sahrens dmu_tx_t *tx; 3421fa9e4066Sahrens vnode_t *realvp; 3422fa9e4066Sahrens int error; 3423da6c28aaSamw int zf = ZNEW; 3424da6c28aaSamw uid_t owner; 3425fa9e4066Sahrens 3426fa9e4066Sahrens ASSERT(tdvp->v_type == VDIR); 3427fa9e4066Sahrens 34283cb34c60Sahrens ZFS_ENTER(zfsvfs); 34293cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3430f18faf3fSek zilog = zfsvfs->z_log; 3431fa9e4066Sahrens 3432da6c28aaSamw if (VOP_REALVP(svp, &realvp, ct) == 0) 3433fa9e4066Sahrens svp = realvp; 3434fa9e4066Sahrens 3435fa9e4066Sahrens if (svp->v_vfsp != tdvp->v_vfsp) { 3436fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3437fa9e4066Sahrens return (EXDEV); 3438fa9e4066Sahrens } 34393cb34c60Sahrens szp = VTOZ(svp); 34403cb34c60Sahrens ZFS_VERIFY_ZP(szp); 3441fa9e4066Sahrens 3442de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, 3443da6c28aaSamw strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3444da6c28aaSamw ZFS_EXIT(zfsvfs); 3445da6c28aaSamw return (EILSEQ); 3446da6c28aaSamw } 3447da6c28aaSamw if (flags & FIGNORECASE) 3448da6c28aaSamw zf |= ZCILOOK; 3449da6c28aaSamw 3450fa9e4066Sahrens top: 3451fa9e4066Sahrens /* 3452fa9e4066Sahrens * We do not support links between attributes and non-attributes 3453fa9e4066Sahrens * because of the potential security risk of creating links 3454fa9e4066Sahrens * into "normal" file space in order to circumvent restrictions 3455fa9e4066Sahrens * imposed in attribute space. 3456fa9e4066Sahrens */ 3457fa9e4066Sahrens if ((szp->z_phys->zp_flags & ZFS_XATTR) != 3458fa9e4066Sahrens (dzp->z_phys->zp_flags & ZFS_XATTR)) { 3459fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3460fa9e4066Sahrens return (EINVAL); 3461fa9e4066Sahrens } 3462fa9e4066Sahrens 3463fa9e4066Sahrens /* 3464fa9e4066Sahrens * POSIX dictates that we return EPERM here. 3465fa9e4066Sahrens * Better choices include ENOTSUP or EISDIR. 3466fa9e4066Sahrens */ 3467fa9e4066Sahrens if (svp->v_type == VDIR) { 3468fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3469fa9e4066Sahrens return (EPERM); 3470fa9e4066Sahrens } 3471fa9e4066Sahrens 3472e0d35c44Smarks owner = zfs_fuid_map_id(zfsvfs, szp->z_phys->zp_uid, cr, ZFS_OWNER); 3473da6c28aaSamw if (owner != crgetuid(cr) && 3474fa9e4066Sahrens secpolicy_basic_link(cr) != 0) { 3475fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3476fa9e4066Sahrens return (EPERM); 3477fa9e4066Sahrens } 3478fa9e4066Sahrens 3479da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3480fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3481fa9e4066Sahrens return (error); 3482fa9e4066Sahrens } 3483fa9e4066Sahrens 3484fa9e4066Sahrens /* 3485fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3486fa9e4066Sahrens */ 3487da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &tzp, zf, NULL, NULL); 3488da6c28aaSamw if (error) { 3489fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3490fa9e4066Sahrens return (error); 3491fa9e4066Sahrens } 3492fa9e4066Sahrens 3493fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3494fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); 3495ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 3496fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 3497fa9e4066Sahrens if (error) { 3498fa9e4066Sahrens zfs_dirent_unlock(dl); 3499fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 35008a2f1b91Sahrens dmu_tx_wait(tx); 35018a2f1b91Sahrens dmu_tx_abort(tx); 3502fa9e4066Sahrens goto top; 3503fa9e4066Sahrens } 35048a2f1b91Sahrens dmu_tx_abort(tx); 3505fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3506fa9e4066Sahrens return (error); 3507fa9e4066Sahrens } 3508fa9e4066Sahrens 3509fa9e4066Sahrens error = zfs_link_create(dl, szp, tx, 0); 3510fa9e4066Sahrens 3511da6c28aaSamw if (error == 0) { 3512da6c28aaSamw uint64_t txtype = TX_LINK; 3513da6c28aaSamw if (flags & FIGNORECASE) 3514da6c28aaSamw txtype |= TX_CI; 3515da6c28aaSamw zfs_log_link(zilog, tx, txtype, dzp, szp, name); 3516da6c28aaSamw } 3517fa9e4066Sahrens 3518fa9e4066Sahrens dmu_tx_commit(tx); 3519fa9e4066Sahrens 3520fa9e4066Sahrens zfs_dirent_unlock(dl); 3521fa9e4066Sahrens 3522df2381bfSpraks if (error == 0) { 3523da6c28aaSamw vnevent_link(svp, ct); 3524df2381bfSpraks } 3525df2381bfSpraks 3526fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3527fa9e4066Sahrens return (error); 3528fa9e4066Sahrens } 3529fa9e4066Sahrens 3530fa9e4066Sahrens /* 3531fa9e4066Sahrens * zfs_null_putapage() is used when the file system has been force 3532fa9e4066Sahrens * unmounted. It just drops the pages. 3533fa9e4066Sahrens */ 3534fa9e4066Sahrens /* ARGSUSED */ 3535fa9e4066Sahrens static int 3536fa9e4066Sahrens zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3537fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3538fa9e4066Sahrens { 3539fa9e4066Sahrens pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 3540fa9e4066Sahrens return (0); 3541fa9e4066Sahrens } 3542fa9e4066Sahrens 354344eda4d7Smaybee /* 354444eda4d7Smaybee * Push a page out to disk, klustering if possible. 354544eda4d7Smaybee * 354644eda4d7Smaybee * IN: vp - file to push page to. 354744eda4d7Smaybee * pp - page to push. 354844eda4d7Smaybee * flags - additional flags. 354944eda4d7Smaybee * cr - credentials of caller. 355044eda4d7Smaybee * 355144eda4d7Smaybee * OUT: offp - start of range pushed. 355244eda4d7Smaybee * lenp - len of range pushed. 355344eda4d7Smaybee * 355444eda4d7Smaybee * RETURN: 0 if success 355544eda4d7Smaybee * error code if failure 355644eda4d7Smaybee * 355744eda4d7Smaybee * NOTE: callers must have locked the page to be pushed. On 355844eda4d7Smaybee * exit, the page (and all other pages in the kluster) must be 355944eda4d7Smaybee * unlocked. 356044eda4d7Smaybee */ 3561fa9e4066Sahrens /* ARGSUSED */ 3562fa9e4066Sahrens static int 3563fa9e4066Sahrens zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3564fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3565fa9e4066Sahrens { 3566fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3567fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3568fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 3569fa9e4066Sahrens dmu_tx_t *tx; 3570104e2ed7Sperrin rl_t *rl; 357144eda4d7Smaybee u_offset_t off, koff; 357244eda4d7Smaybee size_t len, klen; 3573f4d2e9e6Smaybee uint64_t filesz; 3574fa9e4066Sahrens int err; 3575fa9e4066Sahrens 3576f4d2e9e6Smaybee filesz = zp->z_phys->zp_size; 3577fa9e4066Sahrens off = pp->p_offset; 357844eda4d7Smaybee len = PAGESIZE; 357944eda4d7Smaybee /* 358044eda4d7Smaybee * If our blocksize is bigger than the page size, try to kluster 358144eda4d7Smaybee * muiltiple pages so that we write a full block (thus avoiding 358244eda4d7Smaybee * a read-modify-write). 358344eda4d7Smaybee */ 3584f4d2e9e6Smaybee if (off < filesz && zp->z_blksz > PAGESIZE) { 358544eda4d7Smaybee if (!ISP2(zp->z_blksz)) { 358644eda4d7Smaybee /* Only one block in the file. */ 358744eda4d7Smaybee klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 358844eda4d7Smaybee koff = 0; 358944eda4d7Smaybee } else { 359044eda4d7Smaybee klen = zp->z_blksz; 359144eda4d7Smaybee koff = P2ALIGN(off, (u_offset_t)klen); 359244eda4d7Smaybee } 359344eda4d7Smaybee ASSERT(koff <= filesz); 359444eda4d7Smaybee if (koff + klen > filesz) 359544eda4d7Smaybee klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE); 359644eda4d7Smaybee pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); 359744eda4d7Smaybee } 359844eda4d7Smaybee ASSERT3U(btop(len), ==, btopr(len)); 359944eda4d7Smaybee top: 360044eda4d7Smaybee rl = zfs_range_lock(zp, off, len, RL_WRITER); 3601dd6ef538Smaybee /* 3602dd6ef538Smaybee * Can't push pages past end-of-file. 3603dd6ef538Smaybee */ 3604f4d2e9e6Smaybee filesz = zp->z_phys->zp_size; 3605f4d2e9e6Smaybee if (off >= filesz) { 3606f4d2e9e6Smaybee /* ignore all pages */ 360744eda4d7Smaybee err = 0; 360844eda4d7Smaybee goto out; 3609f4d2e9e6Smaybee } else if (off + len > filesz) { 3610f4d2e9e6Smaybee int npages = btopr(filesz - off); 361144eda4d7Smaybee page_t *trunc; 361244eda4d7Smaybee 361344eda4d7Smaybee page_list_break(&pp, &trunc, npages); 3614f4d2e9e6Smaybee /* ignore pages past end of file */ 361544eda4d7Smaybee if (trunc) 3616f4d2e9e6Smaybee pvn_write_done(trunc, flags); 3617f4d2e9e6Smaybee len = filesz - off; 3618dd6ef538Smaybee } 3619fa9e4066Sahrens 3620fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3621fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, off, len); 3622fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3623fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 3624fa9e4066Sahrens if (err != 0) { 3625fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 362644eda4d7Smaybee zfs_range_unlock(rl); 36278a2f1b91Sahrens dmu_tx_wait(tx); 36288a2f1b91Sahrens dmu_tx_abort(tx); 362944eda4d7Smaybee err = 0; 3630fa9e4066Sahrens goto top; 3631fa9e4066Sahrens } 36328a2f1b91Sahrens dmu_tx_abort(tx); 3633fa9e4066Sahrens goto out; 3634fa9e4066Sahrens } 3635fa9e4066Sahrens 363644eda4d7Smaybee if (zp->z_blksz <= PAGESIZE) { 3637*0fab61baSJonathan W Adams caddr_t va = zfs_map_page(pp, S_READ); 363844eda4d7Smaybee ASSERT3U(len, <=, PAGESIZE); 363944eda4d7Smaybee dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 3640*0fab61baSJonathan W Adams zfs_unmap_page(pp, va); 364144eda4d7Smaybee } else { 364244eda4d7Smaybee err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 364344eda4d7Smaybee } 3644fa9e4066Sahrens 364544eda4d7Smaybee if (err == 0) { 364644eda4d7Smaybee zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 3647feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, off, len, 0); 364844eda4d7Smaybee dmu_tx_commit(tx); 364944eda4d7Smaybee } 3650fa9e4066Sahrens 365144eda4d7Smaybee out: 3652c5c6ffa0Smaybee zfs_range_unlock(rl); 3653f4d2e9e6Smaybee pvn_write_done(pp, (err ? B_ERROR : 0) | flags); 3654fa9e4066Sahrens if (offp) 3655fa9e4066Sahrens *offp = off; 3656fa9e4066Sahrens if (lenp) 3657fa9e4066Sahrens *lenp = len; 3658fa9e4066Sahrens 3659fa9e4066Sahrens return (err); 3660fa9e4066Sahrens } 3661fa9e4066Sahrens 3662fa9e4066Sahrens /* 3663fa9e4066Sahrens * Copy the portion of the file indicated from pages into the file. 3664fa9e4066Sahrens * The pages are stored in a page list attached to the files vnode. 3665fa9e4066Sahrens * 3666fa9e4066Sahrens * IN: vp - vnode of file to push page data to. 3667fa9e4066Sahrens * off - position in file to put data. 3668fa9e4066Sahrens * len - amount of data to write. 3669fa9e4066Sahrens * flags - flags to control the operation. 3670fa9e4066Sahrens * cr - credentials of caller. 3671da6c28aaSamw * ct - caller context. 3672fa9e4066Sahrens * 3673fa9e4066Sahrens * RETURN: 0 if success 3674fa9e4066Sahrens * error code if failure 3675fa9e4066Sahrens * 3676fa9e4066Sahrens * Timestamps: 3677fa9e4066Sahrens * vp - ctime|mtime updated 3678fa9e4066Sahrens */ 3679da6c28aaSamw /*ARGSUSED*/ 3680fa9e4066Sahrens static int 3681da6c28aaSamw zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr, 3682da6c28aaSamw caller_context_t *ct) 3683fa9e4066Sahrens { 3684fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3685fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3686fa9e4066Sahrens page_t *pp; 3687fa9e4066Sahrens size_t io_len; 3688fa9e4066Sahrens u_offset_t io_off; 3689104e2ed7Sperrin uint64_t filesz; 3690fa9e4066Sahrens int error = 0; 3691fa9e4066Sahrens 36923cb34c60Sahrens ZFS_ENTER(zfsvfs); 36933cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3694fa9e4066Sahrens 3695fa9e4066Sahrens if (len == 0) { 3696fa9e4066Sahrens /* 3697fa9e4066Sahrens * Search the entire vp list for pages >= off. 3698fa9e4066Sahrens */ 3699fa9e4066Sahrens error = pvn_vplist_dirty(vp, (u_offset_t)off, zfs_putapage, 3700fa9e4066Sahrens flags, cr); 3701fe9cf88cSperrin goto out; 3702fa9e4066Sahrens } 3703fa9e4066Sahrens 3704104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 3705104e2ed7Sperrin if (off > filesz) { 3706fa9e4066Sahrens /* past end of file */ 3707fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3708fa9e4066Sahrens return (0); 3709fa9e4066Sahrens } 3710fa9e4066Sahrens 3711104e2ed7Sperrin len = MIN(len, filesz - off); 3712fa9e4066Sahrens 3713fe9cf88cSperrin for (io_off = off; io_off < off + len; io_off += io_len) { 3714fa9e4066Sahrens if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 3715104e2ed7Sperrin pp = page_lookup(vp, io_off, 3716ecb72030Sperrin (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); 3717fa9e4066Sahrens } else { 3718fa9e4066Sahrens pp = page_lookup_nowait(vp, io_off, 3719ecb72030Sperrin (flags & B_FREE) ? SE_EXCL : SE_SHARED); 3720fa9e4066Sahrens } 3721fa9e4066Sahrens 3722fa9e4066Sahrens if (pp != NULL && pvn_getdirty(pp, flags)) { 3723fa9e4066Sahrens int err; 3724fa9e4066Sahrens 3725fa9e4066Sahrens /* 3726fa9e4066Sahrens * Found a dirty page to push 3727fa9e4066Sahrens */ 3728104e2ed7Sperrin err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 3729104e2ed7Sperrin if (err) 3730fa9e4066Sahrens error = err; 3731fa9e4066Sahrens } else { 3732fa9e4066Sahrens io_len = PAGESIZE; 3733fa9e4066Sahrens } 3734fa9e4066Sahrens } 3735fe9cf88cSperrin out: 3736b19a79ecSperrin if ((flags & B_ASYNC) == 0) 3737b19a79ecSperrin zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id); 3738fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3739fa9e4066Sahrens return (error); 3740fa9e4066Sahrens } 3741fa9e4066Sahrens 3742da6c28aaSamw /*ARGSUSED*/ 3743fa9e4066Sahrens void 3744da6c28aaSamw zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 3745fa9e4066Sahrens { 3746fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3747fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3748fa9e4066Sahrens int error; 3749fa9e4066Sahrens 3750f18faf3fSek rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 37514ccbb6e7Sahrens if (zp->z_dbuf == NULL) { 37524ccbb6e7Sahrens /* 3753874395d5Smaybee * The fs has been unmounted, or we did a 3754874395d5Smaybee * suspend/resume and this file no longer exists. 37554ccbb6e7Sahrens */ 3756fa9e4066Sahrens if (vn_has_cached_data(vp)) { 3757fa9e4066Sahrens (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, 3758fa9e4066Sahrens B_INVAL, cr); 3759fa9e4066Sahrens } 3760fa9e4066Sahrens 3761ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 3762fa9e4066Sahrens vp->v_count = 0; /* count arrives as 1 */ 37634ccbb6e7Sahrens mutex_exit(&zp->z_lock); 3764f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 3765874395d5Smaybee zfs_znode_free(zp); 3766fa9e4066Sahrens return; 3767fa9e4066Sahrens } 3768fa9e4066Sahrens 3769fa9e4066Sahrens /* 3770fa9e4066Sahrens * Attempt to push any data in the page cache. If this fails 3771fa9e4066Sahrens * we will get kicked out later in zfs_zinactive(). 3772fa9e4066Sahrens */ 37738afd4dd6Sperrin if (vn_has_cached_data(vp)) { 37748afd4dd6Sperrin (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, 37758afd4dd6Sperrin cr); 37768afd4dd6Sperrin } 3777fa9e4066Sahrens 3778893a6d32Sahrens if (zp->z_atime_dirty && zp->z_unlinked == 0) { 3779fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 3780fa9e4066Sahrens 3781fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3782fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 3783fa9e4066Sahrens if (error) { 3784fa9e4066Sahrens dmu_tx_abort(tx); 3785fa9e4066Sahrens } else { 3786fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 3787fa9e4066Sahrens mutex_enter(&zp->z_lock); 3788fa9e4066Sahrens zp->z_atime_dirty = 0; 3789fa9e4066Sahrens mutex_exit(&zp->z_lock); 3790fa9e4066Sahrens dmu_tx_commit(tx); 3791fa9e4066Sahrens } 3792fa9e4066Sahrens } 3793fa9e4066Sahrens 3794fa9e4066Sahrens zfs_zinactive(zp); 3795f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 3796fa9e4066Sahrens } 3797fa9e4066Sahrens 3798fa9e4066Sahrens /* 3799fa9e4066Sahrens * Bounds-check the seek operation. 3800fa9e4066Sahrens * 3801fa9e4066Sahrens * IN: vp - vnode seeking within 3802fa9e4066Sahrens * ooff - old file offset 3803fa9e4066Sahrens * noffp - pointer to new file offset 3804da6c28aaSamw * ct - caller context 3805fa9e4066Sahrens * 3806fa9e4066Sahrens * RETURN: 0 if success 3807fa9e4066Sahrens * EINVAL if new offset invalid 3808fa9e4066Sahrens */ 3809fa9e4066Sahrens /* ARGSUSED */ 3810fa9e4066Sahrens static int 3811da6c28aaSamw zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, 3812da6c28aaSamw caller_context_t *ct) 3813fa9e4066Sahrens { 3814fa9e4066Sahrens if (vp->v_type == VDIR) 3815fa9e4066Sahrens return (0); 3816fa9e4066Sahrens return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 3817fa9e4066Sahrens } 3818fa9e4066Sahrens 3819fa9e4066Sahrens /* 3820fa9e4066Sahrens * Pre-filter the generic locking function to trap attempts to place 3821fa9e4066Sahrens * a mandatory lock on a memory mapped file. 3822fa9e4066Sahrens */ 3823fa9e4066Sahrens static int 3824fa9e4066Sahrens zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 3825da6c28aaSamw flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct) 3826fa9e4066Sahrens { 3827fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3828fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3829fa9e4066Sahrens int error; 3830fa9e4066Sahrens 38313cb34c60Sahrens ZFS_ENTER(zfsvfs); 38323cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3833fa9e4066Sahrens 3834fa9e4066Sahrens /* 3835ea8dc4b6Seschrock * We are following the UFS semantics with respect to mapcnt 3836ea8dc4b6Seschrock * here: If we see that the file is mapped already, then we will 3837ea8dc4b6Seschrock * return an error, but we don't worry about races between this 3838ea8dc4b6Seschrock * function and zfs_map(). 3839fa9e4066Sahrens */ 3840ea8dc4b6Seschrock if (zp->z_mapcnt > 0 && MANDMODE((mode_t)zp->z_phys->zp_mode)) { 3841fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3842fa9e4066Sahrens return (EAGAIN); 3843fa9e4066Sahrens } 3844da6c28aaSamw error = fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct); 3845fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3846fa9e4066Sahrens return (error); 3847fa9e4066Sahrens } 3848fa9e4066Sahrens 3849fa9e4066Sahrens /* 3850fa9e4066Sahrens * If we can't find a page in the cache, we will create a new page 3851fa9e4066Sahrens * and fill it with file data. For efficiency, we may try to fill 3852104e2ed7Sperrin * multiple pages at once (klustering). 3853fa9e4066Sahrens */ 3854fa9e4066Sahrens static int 3855fa9e4066Sahrens zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 3856fa9e4066Sahrens caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 3857fa9e4066Sahrens { 3858fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3859fa9e4066Sahrens page_t *pp, *cur_pp; 3860fa9e4066Sahrens objset_t *os = zp->z_zfsvfs->z_os; 3861fa9e4066Sahrens caddr_t va; 3862fa9e4066Sahrens u_offset_t io_off, total; 3863fa9e4066Sahrens uint64_t oid = zp->z_id; 3864fa9e4066Sahrens size_t io_len; 3865104e2ed7Sperrin uint64_t filesz; 3866fa9e4066Sahrens int err; 3867fa9e4066Sahrens 3868fa9e4066Sahrens /* 3869fa9e4066Sahrens * If we are only asking for a single page don't bother klustering. 3870fa9e4066Sahrens */ 3871104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 387244eda4d7Smaybee if (off >= filesz) 387344eda4d7Smaybee return (EFAULT); 387444eda4d7Smaybee if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 3875fa9e4066Sahrens io_off = off; 3876fa9e4066Sahrens io_len = PAGESIZE; 3877fa9e4066Sahrens pp = page_create_va(vp, io_off, io_len, PG_WAIT, seg, addr); 3878fa9e4066Sahrens } else { 3879fa9e4066Sahrens /* 3880fa9e4066Sahrens * Try to fill a kluster of pages (a blocks worth). 3881fa9e4066Sahrens */ 3882fa9e4066Sahrens size_t klen; 3883fa9e4066Sahrens u_offset_t koff; 3884fa9e4066Sahrens 3885fa9e4066Sahrens if (!ISP2(zp->z_blksz)) { 3886fa9e4066Sahrens /* Only one block in the file. */ 3887fa9e4066Sahrens klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 3888fa9e4066Sahrens koff = 0; 3889fa9e4066Sahrens } else { 3890574679b5Sgw /* 3891574679b5Sgw * It would be ideal to align our offset to the 3892574679b5Sgw * blocksize but doing so has resulted in some 3893574679b5Sgw * strange application crashes. For now, we 3894574679b5Sgw * leave the offset as is and only adjust the 3895574679b5Sgw * length if we are off the end of the file. 3896574679b5Sgw */ 3897574679b5Sgw koff = off; 3898fa9e4066Sahrens klen = plsz; 3899fa9e4066Sahrens } 3900dd6ef538Smaybee ASSERT(koff <= filesz); 3901dd6ef538Smaybee if (koff + klen > filesz) 3902dd6ef538Smaybee klen = P2ROUNDUP(filesz, (uint64_t)PAGESIZE) - koff; 390344eda4d7Smaybee ASSERT3U(off, >=, koff); 390444eda4d7Smaybee ASSERT3U(off, <, koff + klen); 3905fa9e4066Sahrens pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 3906ecb72030Sperrin &io_len, koff, klen, 0); 3907fa9e4066Sahrens } 3908fa9e4066Sahrens if (pp == NULL) { 3909fa9e4066Sahrens /* 3910fa9e4066Sahrens * Some other thread entered the page before us. 3911fa9e4066Sahrens * Return to zfs_getpage to retry the lookup. 3912fa9e4066Sahrens */ 3913fa9e4066Sahrens *pl = NULL; 3914fa9e4066Sahrens return (0); 3915fa9e4066Sahrens } 3916fa9e4066Sahrens 3917fa9e4066Sahrens /* 3918fa9e4066Sahrens * Fill the pages in the kluster. 3919fa9e4066Sahrens */ 3920fa9e4066Sahrens cur_pp = pp; 3921fa9e4066Sahrens for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 392244eda4d7Smaybee ASSERT3U(io_off, ==, cur_pp->p_offset); 3923*0fab61baSJonathan W Adams va = zfs_map_page(cur_pp, S_WRITE); 3924ea8dc4b6Seschrock err = dmu_read(os, oid, io_off, PAGESIZE, va); 3925*0fab61baSJonathan W Adams zfs_unmap_page(cur_pp, va); 3926fa9e4066Sahrens if (err) { 3927fa9e4066Sahrens /* On error, toss the entire kluster */ 3928fa9e4066Sahrens pvn_read_done(pp, B_ERROR); 3929b87f3af3Sperrin /* convert checksum errors into IO errors */ 3930b87f3af3Sperrin if (err == ECKSUM) 3931b87f3af3Sperrin err = EIO; 3932fa9e4066Sahrens return (err); 3933fa9e4066Sahrens } 3934fa9e4066Sahrens cur_pp = cur_pp->p_next; 3935fa9e4066Sahrens } 3936fa9e4066Sahrens out: 3937fa9e4066Sahrens /* 3938fa9e4066Sahrens * Fill in the page list array from the kluster. If 3939fa9e4066Sahrens * there are too many pages in the kluster, return 3940fa9e4066Sahrens * as many pages as possible starting from the desired 3941fa9e4066Sahrens * offset `off'. 3942fa9e4066Sahrens * NOTE: the page list will always be null terminated. 3943fa9e4066Sahrens */ 3944fa9e4066Sahrens pvn_plist_init(pp, pl, plsz, off, io_len, rw); 3945fa9e4066Sahrens 3946fa9e4066Sahrens return (0); 3947fa9e4066Sahrens } 3948fa9e4066Sahrens 3949fa9e4066Sahrens /* 3950fa9e4066Sahrens * Return pointers to the pages for the file region [off, off + len] 3951fa9e4066Sahrens * in the pl array. If plsz is greater than len, this function may 3952fa9e4066Sahrens * also return page pointers from before or after the specified 3953fa9e4066Sahrens * region (i.e. some region [off', off' + plsz]). These additional 3954fa9e4066Sahrens * pages are only returned if they are already in the cache, or were 3955fa9e4066Sahrens * created as part of a klustered read. 3956fa9e4066Sahrens * 3957fa9e4066Sahrens * IN: vp - vnode of file to get data from. 3958fa9e4066Sahrens * off - position in file to get data from. 3959fa9e4066Sahrens * len - amount of data to retrieve. 3960fa9e4066Sahrens * plsz - length of provided page list. 3961fa9e4066Sahrens * seg - segment to obtain pages for. 3962fa9e4066Sahrens * addr - virtual address of fault. 3963fa9e4066Sahrens * rw - mode of created pages. 3964fa9e4066Sahrens * cr - credentials of caller. 3965da6c28aaSamw * ct - caller context. 3966fa9e4066Sahrens * 3967fa9e4066Sahrens * OUT: protp - protection mode of created pages. 3968fa9e4066Sahrens * pl - list of pages created. 3969fa9e4066Sahrens * 3970fa9e4066Sahrens * RETURN: 0 if success 3971fa9e4066Sahrens * error code if failure 3972fa9e4066Sahrens * 3973fa9e4066Sahrens * Timestamps: 3974fa9e4066Sahrens * vp - atime updated 3975fa9e4066Sahrens */ 3976fa9e4066Sahrens /* ARGSUSED */ 3977fa9e4066Sahrens static int 3978fa9e4066Sahrens zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 3979fa9e4066Sahrens page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 3980da6c28aaSamw enum seg_rw rw, cred_t *cr, caller_context_t *ct) 3981fa9e4066Sahrens { 3982fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3983fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3984fa9e4066Sahrens page_t *pp, **pl0 = pl; 3985fe2f476aSperrin int need_unlock = 0, err = 0; 3986fe2f476aSperrin offset_t orig_off; 3987fa9e4066Sahrens 39883cb34c60Sahrens ZFS_ENTER(zfsvfs); 39893cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3990fa9e4066Sahrens 3991fa9e4066Sahrens if (protp) 3992fa9e4066Sahrens *protp = PROT_ALL; 3993fa9e4066Sahrens 3994fa9e4066Sahrens /* no faultahead (for now) */ 3995fa9e4066Sahrens if (pl == NULL) { 3996fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3997fa9e4066Sahrens return (0); 3998fa9e4066Sahrens } 3999fa9e4066Sahrens 4000fa9e4066Sahrens /* can't fault past EOF */ 4001fa9e4066Sahrens if (off >= zp->z_phys->zp_size) { 4002fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4003fa9e4066Sahrens return (EFAULT); 4004fa9e4066Sahrens } 4005fe2f476aSperrin orig_off = off; 4006fa9e4066Sahrens 4007fa9e4066Sahrens /* 4008fa9e4066Sahrens * If we already own the lock, then we must be page faulting 4009fa9e4066Sahrens * in the middle of a write to this file (i.e., we are writing 4010fa9e4066Sahrens * to this file using data from a mapped region of the file). 4011fa9e4066Sahrens */ 4012fe2f476aSperrin if (rw_owner(&zp->z_map_lock) != curthread) { 4013fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 4014fa9e4066Sahrens need_unlock = TRUE; 4015fa9e4066Sahrens } 4016fa9e4066Sahrens 4017fa9e4066Sahrens /* 4018fa9e4066Sahrens * Loop through the requested range [off, off + len] looking 4019fa9e4066Sahrens * for pages. If we don't find a page, we will need to create 4020fa9e4066Sahrens * a new page and fill it with data from the file. 4021fa9e4066Sahrens */ 4022fa9e4066Sahrens while (len > 0) { 4023fa9e4066Sahrens if (plsz < PAGESIZE) 4024fa9e4066Sahrens break; 4025fa9e4066Sahrens if (pp = page_lookup(vp, off, SE_SHARED)) { 4026fa9e4066Sahrens *pl++ = pp; 4027fa9e4066Sahrens off += PAGESIZE; 4028fa9e4066Sahrens addr += PAGESIZE; 4029fa9e4066Sahrens len -= PAGESIZE; 4030fa9e4066Sahrens plsz -= PAGESIZE; 4031fa9e4066Sahrens } else { 4032fa9e4066Sahrens err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw); 4033fe2f476aSperrin if (err) 4034fe2f476aSperrin goto out; 4035fa9e4066Sahrens /* 4036fa9e4066Sahrens * klustering may have changed our region 4037fa9e4066Sahrens * to be block aligned. 4038fa9e4066Sahrens */ 4039fa9e4066Sahrens if (((pp = *pl) != 0) && (off != pp->p_offset)) { 4040fa9e4066Sahrens int delta = off - pp->p_offset; 4041fa9e4066Sahrens len += delta; 4042fa9e4066Sahrens off -= delta; 4043fa9e4066Sahrens addr -= delta; 4044fa9e4066Sahrens } 4045fa9e4066Sahrens while (*pl) { 4046fa9e4066Sahrens pl++; 4047fa9e4066Sahrens off += PAGESIZE; 4048fa9e4066Sahrens addr += PAGESIZE; 4049fa9e4066Sahrens plsz -= PAGESIZE; 4050fa9e4066Sahrens if (len > PAGESIZE) 4051fa9e4066Sahrens len -= PAGESIZE; 4052fa9e4066Sahrens else 4053fa9e4066Sahrens len = 0; 4054fa9e4066Sahrens } 4055fa9e4066Sahrens } 4056fa9e4066Sahrens } 4057fa9e4066Sahrens 4058fa9e4066Sahrens /* 4059fa9e4066Sahrens * Fill out the page array with any pages already in the cache. 4060fa9e4066Sahrens */ 4061fa9e4066Sahrens while (plsz > 0) { 4062fa9e4066Sahrens pp = page_lookup_nowait(vp, off, SE_SHARED); 4063fa9e4066Sahrens if (pp == NULL) 4064fa9e4066Sahrens break; 4065fa9e4066Sahrens *pl++ = pp; 4066fa9e4066Sahrens off += PAGESIZE; 4067fa9e4066Sahrens plsz -= PAGESIZE; 4068fa9e4066Sahrens } 4069fa9e4066Sahrens 4070fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 4071fa9e4066Sahrens out: 4072fe2f476aSperrin /* 4073fe2f476aSperrin * We can't grab the range lock for the page as reader which would 4074fe2f476aSperrin * stop truncation as this leads to deadlock. So we need to recheck 4075fe2f476aSperrin * the file size. 4076fe2f476aSperrin */ 4077fe2f476aSperrin if (orig_off >= zp->z_phys->zp_size) 4078fe2f476aSperrin err = EFAULT; 4079fe2f476aSperrin if (err) { 4080fe2f476aSperrin /* 4081fe2f476aSperrin * Release any pages we have previously locked. 4082fe2f476aSperrin */ 4083fe2f476aSperrin while (pl > pl0) 4084fe2f476aSperrin page_unlock(*--pl); 4085fe2f476aSperrin } 4086fe2f476aSperrin 4087fa9e4066Sahrens *pl = NULL; 4088fa9e4066Sahrens 4089fa9e4066Sahrens if (need_unlock) 4090fa9e4066Sahrens rw_exit(&zp->z_map_lock); 4091fa9e4066Sahrens 4092fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4093fa9e4066Sahrens return (err); 4094fa9e4066Sahrens } 4095fa9e4066Sahrens 4096ea8dc4b6Seschrock /* 4097ea8dc4b6Seschrock * Request a memory map for a section of a file. This code interacts 4098ea8dc4b6Seschrock * with common code and the VM system as follows: 4099ea8dc4b6Seschrock * 4100ea8dc4b6Seschrock * common code calls mmap(), which ends up in smmap_common() 4101ea8dc4b6Seschrock * 4102ea8dc4b6Seschrock * this calls VOP_MAP(), which takes you into (say) zfs 4103ea8dc4b6Seschrock * 4104ea8dc4b6Seschrock * zfs_map() calls as_map(), passing segvn_create() as the callback 4105ea8dc4b6Seschrock * 4106ea8dc4b6Seschrock * segvn_create() creates the new segment and calls VOP_ADDMAP() 4107ea8dc4b6Seschrock * 4108ea8dc4b6Seschrock * zfs_addmap() updates z_mapcnt 4109ea8dc4b6Seschrock */ 4110da6c28aaSamw /*ARGSUSED*/ 4111fa9e4066Sahrens static int 4112fa9e4066Sahrens zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 4113da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4114da6c28aaSamw caller_context_t *ct) 4115fa9e4066Sahrens { 4116fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4117fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4118fa9e4066Sahrens segvn_crargs_t vn_a; 4119fa9e4066Sahrens int error; 4120fa9e4066Sahrens 41210616c50eSmarks ZFS_ENTER(zfsvfs); 41220616c50eSmarks ZFS_VERIFY_ZP(zp); 41230616c50eSmarks 4124da6c28aaSamw if ((prot & PROT_WRITE) && 4125da6c28aaSamw (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_READONLY | 41260616c50eSmarks ZFS_APPENDONLY))) { 41270616c50eSmarks ZFS_EXIT(zfsvfs); 4128da6c28aaSamw return (EPERM); 41290616c50eSmarks } 4130da6c28aaSamw 41310616c50eSmarks if ((prot & (PROT_READ | PROT_EXEC)) && 41320616c50eSmarks (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED)) { 41330616c50eSmarks ZFS_EXIT(zfsvfs); 41340616c50eSmarks return (EACCES); 41350616c50eSmarks } 4136fa9e4066Sahrens 4137fa9e4066Sahrens if (vp->v_flag & VNOMAP) { 4138fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4139fa9e4066Sahrens return (ENOSYS); 4140fa9e4066Sahrens } 4141fa9e4066Sahrens 4142fa9e4066Sahrens if (off < 0 || len > MAXOFFSET_T - off) { 4143fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4144fa9e4066Sahrens return (ENXIO); 4145fa9e4066Sahrens } 4146fa9e4066Sahrens 4147fa9e4066Sahrens if (vp->v_type != VREG) { 4148fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4149fa9e4066Sahrens return (ENODEV); 4150fa9e4066Sahrens } 4151fa9e4066Sahrens 4152fa9e4066Sahrens /* 4153fa9e4066Sahrens * If file is locked, disallow mapping. 4154fa9e4066Sahrens */ 4155ea8dc4b6Seschrock if (MANDMODE((mode_t)zp->z_phys->zp_mode) && vn_has_flocks(vp)) { 4156ea8dc4b6Seschrock ZFS_EXIT(zfsvfs); 4157ea8dc4b6Seschrock return (EAGAIN); 4158fa9e4066Sahrens } 4159fa9e4066Sahrens 4160fa9e4066Sahrens as_rangelock(as); 416160946fe0Smec error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); 416260946fe0Smec if (error != 0) { 416360946fe0Smec as_rangeunlock(as); 416460946fe0Smec ZFS_EXIT(zfsvfs); 416560946fe0Smec return (error); 4166fa9e4066Sahrens } 4167fa9e4066Sahrens 4168fa9e4066Sahrens vn_a.vp = vp; 4169fa9e4066Sahrens vn_a.offset = (u_offset_t)off; 4170fa9e4066Sahrens vn_a.type = flags & MAP_TYPE; 4171fa9e4066Sahrens vn_a.prot = prot; 4172fa9e4066Sahrens vn_a.maxprot = maxprot; 4173fa9e4066Sahrens vn_a.cred = cr; 4174fa9e4066Sahrens vn_a.amp = NULL; 4175fa9e4066Sahrens vn_a.flags = flags & ~MAP_TYPE; 41764944b02eSkchow vn_a.szc = 0; 41774944b02eSkchow vn_a.lgrp_mem_policy_flags = 0; 4178fa9e4066Sahrens 4179fa9e4066Sahrens error = as_map(as, *addrp, len, segvn_create, &vn_a); 4180fa9e4066Sahrens 4181fa9e4066Sahrens as_rangeunlock(as); 4182fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4183fa9e4066Sahrens return (error); 4184fa9e4066Sahrens } 4185fa9e4066Sahrens 4186fa9e4066Sahrens /* ARGSUSED */ 4187fa9e4066Sahrens static int 4188fa9e4066Sahrens zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4189da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4190da6c28aaSamw caller_context_t *ct) 4191fa9e4066Sahrens { 4192ea8dc4b6Seschrock uint64_t pages = btopr(len); 4193ea8dc4b6Seschrock 4194ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 4195fa9e4066Sahrens return (0); 4196fa9e4066Sahrens } 4197fa9e4066Sahrens 4198b468a217Seschrock /* 4199b468a217Seschrock * The reason we push dirty pages as part of zfs_delmap() is so that we get a 4200b468a217Seschrock * more accurate mtime for the associated file. Since we don't have a way of 4201b468a217Seschrock * detecting when the data was actually modified, we have to resort to 4202b468a217Seschrock * heuristics. If an explicit msync() is done, then we mark the mtime when the 4203b468a217Seschrock * last page is pushed. The problem occurs when the msync() call is omitted, 4204b468a217Seschrock * which by far the most common case: 4205b468a217Seschrock * 4206b468a217Seschrock * open() 4207b468a217Seschrock * mmap() 4208b468a217Seschrock * <modify memory> 4209b468a217Seschrock * munmap() 4210b468a217Seschrock * close() 4211b468a217Seschrock * <time lapse> 4212b468a217Seschrock * putpage() via fsflush 4213b468a217Seschrock * 4214b468a217Seschrock * If we wait until fsflush to come along, we can have a modification time that 4215b468a217Seschrock * is some arbitrary point in the future. In order to prevent this in the 4216b468a217Seschrock * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is 4217b468a217Seschrock * torn down. 4218b468a217Seschrock */ 4219fa9e4066Sahrens /* ARGSUSED */ 4220fa9e4066Sahrens static int 4221fa9e4066Sahrens zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4222da6c28aaSamw size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr, 4223da6c28aaSamw caller_context_t *ct) 4224fa9e4066Sahrens { 4225ea8dc4b6Seschrock uint64_t pages = btopr(len); 4226ea8dc4b6Seschrock 4227ea8dc4b6Seschrock ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 4228ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 4229b468a217Seschrock 4230b468a217Seschrock if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && 4231b468a217Seschrock vn_has_cached_data(vp)) 4232da6c28aaSamw (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct); 4233b468a217Seschrock 4234fa9e4066Sahrens return (0); 4235fa9e4066Sahrens } 4236fa9e4066Sahrens 4237fa9e4066Sahrens /* 4238fa9e4066Sahrens * Free or allocate space in a file. Currently, this function only 4239fa9e4066Sahrens * supports the `F_FREESP' command. However, this command is somewhat 4240fa9e4066Sahrens * misnamed, as its functionality includes the ability to allocate as 4241fa9e4066Sahrens * well as free space. 4242fa9e4066Sahrens * 4243fa9e4066Sahrens * IN: vp - vnode of file to free data in. 4244fa9e4066Sahrens * cmd - action to take (only F_FREESP supported). 4245fa9e4066Sahrens * bfp - section of file to free/alloc. 4246fa9e4066Sahrens * flag - current file open mode flags. 4247fa9e4066Sahrens * offset - current file offset. 4248fa9e4066Sahrens * cr - credentials of caller [UNUSED]. 4249da6c28aaSamw * ct - caller context. 4250fa9e4066Sahrens * 4251fa9e4066Sahrens * RETURN: 0 if success 4252fa9e4066Sahrens * error code if failure 4253fa9e4066Sahrens * 4254fa9e4066Sahrens * Timestamps: 4255fa9e4066Sahrens * vp - ctime|mtime updated 4256fa9e4066Sahrens */ 4257fa9e4066Sahrens /* ARGSUSED */ 4258fa9e4066Sahrens static int 4259fa9e4066Sahrens zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 4260fa9e4066Sahrens offset_t offset, cred_t *cr, caller_context_t *ct) 4261fa9e4066Sahrens { 4262fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4263fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4264fa9e4066Sahrens uint64_t off, len; 4265fa9e4066Sahrens int error; 4266fa9e4066Sahrens 42673cb34c60Sahrens ZFS_ENTER(zfsvfs); 42683cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4269fa9e4066Sahrens 4270fa9e4066Sahrens if (cmd != F_FREESP) { 4271fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4272fa9e4066Sahrens return (EINVAL); 4273fa9e4066Sahrens } 4274fa9e4066Sahrens 4275fa9e4066Sahrens if (error = convoff(vp, bfp, 0, offset)) { 4276fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4277fa9e4066Sahrens return (error); 4278fa9e4066Sahrens } 4279fa9e4066Sahrens 4280fa9e4066Sahrens if (bfp->l_len < 0) { 4281fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4282fa9e4066Sahrens return (EINVAL); 4283fa9e4066Sahrens } 4284fa9e4066Sahrens 4285fa9e4066Sahrens off = bfp->l_start; 4286104e2ed7Sperrin len = bfp->l_len; /* 0 means from off to end of file */ 4287104e2ed7Sperrin 4288cdb0ab79Smaybee error = zfs_freesp(zp, off, len, flag, TRUE); 4289fa9e4066Sahrens 4290fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4291fa9e4066Sahrens return (error); 4292fa9e4066Sahrens } 4293fa9e4066Sahrens 4294da6c28aaSamw /*ARGSUSED*/ 4295fa9e4066Sahrens static int 4296da6c28aaSamw zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct) 4297fa9e4066Sahrens { 4298fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4299fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4300f18faf3fSek uint32_t gen; 4301fa9e4066Sahrens uint64_t object = zp->z_id; 4302fa9e4066Sahrens zfid_short_t *zfid; 4303fa9e4066Sahrens int size, i; 4304fa9e4066Sahrens 43053cb34c60Sahrens ZFS_ENTER(zfsvfs); 43063cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4307f18faf3fSek gen = (uint32_t)zp->z_gen; 4308fa9e4066Sahrens 4309fa9e4066Sahrens size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 4310fa9e4066Sahrens if (fidp->fid_len < size) { 4311fa9e4066Sahrens fidp->fid_len = size; 43120f2dc02eSek ZFS_EXIT(zfsvfs); 4313fa9e4066Sahrens return (ENOSPC); 4314fa9e4066Sahrens } 4315fa9e4066Sahrens 4316fa9e4066Sahrens zfid = (zfid_short_t *)fidp; 4317fa9e4066Sahrens 4318fa9e4066Sahrens zfid->zf_len = size; 4319fa9e4066Sahrens 4320fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_object); i++) 4321fa9e4066Sahrens zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 4322fa9e4066Sahrens 4323fa9e4066Sahrens /* Must have a non-zero generation number to distinguish from .zfs */ 4324fa9e4066Sahrens if (gen == 0) 4325fa9e4066Sahrens gen = 1; 4326fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_gen); i++) 4327fa9e4066Sahrens zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 4328fa9e4066Sahrens 4329fa9e4066Sahrens if (size == LONG_FID_LEN) { 4330fa9e4066Sahrens uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 4331fa9e4066Sahrens zfid_long_t *zlfid; 4332fa9e4066Sahrens 4333fa9e4066Sahrens zlfid = (zfid_long_t *)fidp; 4334fa9e4066Sahrens 4335fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setid); i++) 4336fa9e4066Sahrens zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 4337fa9e4066Sahrens 4338fa9e4066Sahrens /* XXX - this should be the generation number for the objset */ 4339fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 4340fa9e4066Sahrens zlfid->zf_setgen[i] = 0; 4341fa9e4066Sahrens } 4342fa9e4066Sahrens 4343fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4344fa9e4066Sahrens return (0); 4345fa9e4066Sahrens } 4346fa9e4066Sahrens 4347fa9e4066Sahrens static int 4348da6c28aaSamw zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, 4349da6c28aaSamw caller_context_t *ct) 4350fa9e4066Sahrens { 4351fa9e4066Sahrens znode_t *zp, *xzp; 4352fa9e4066Sahrens zfsvfs_t *zfsvfs; 4353fa9e4066Sahrens zfs_dirlock_t *dl; 4354fa9e4066Sahrens int error; 4355fa9e4066Sahrens 4356fa9e4066Sahrens switch (cmd) { 4357fa9e4066Sahrens case _PC_LINK_MAX: 4358fa9e4066Sahrens *valp = ULONG_MAX; 4359fa9e4066Sahrens return (0); 4360fa9e4066Sahrens 4361fa9e4066Sahrens case _PC_FILESIZEBITS: 4362fa9e4066Sahrens *valp = 64; 4363fa9e4066Sahrens return (0); 4364fa9e4066Sahrens 4365fa9e4066Sahrens case _PC_XATTR_EXISTS: 4366fa9e4066Sahrens zp = VTOZ(vp); 4367fa9e4066Sahrens zfsvfs = zp->z_zfsvfs; 43683cb34c60Sahrens ZFS_ENTER(zfsvfs); 43693cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4370fa9e4066Sahrens *valp = 0; 4371fa9e4066Sahrens error = zfs_dirent_lock(&dl, zp, "", &xzp, 4372da6c28aaSamw ZXATTR | ZEXISTS | ZSHARED, NULL, NULL); 4373fa9e4066Sahrens if (error == 0) { 4374fa9e4066Sahrens zfs_dirent_unlock(dl); 4375fa9e4066Sahrens if (!zfs_dirempty(xzp)) 4376fa9e4066Sahrens *valp = 1; 4377fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 4378fa9e4066Sahrens } else if (error == ENOENT) { 4379fa9e4066Sahrens /* 4380fa9e4066Sahrens * If there aren't extended attributes, it's the 4381fa9e4066Sahrens * same as having zero of them. 4382fa9e4066Sahrens */ 4383fa9e4066Sahrens error = 0; 4384fa9e4066Sahrens } 4385fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4386fa9e4066Sahrens return (error); 4387fa9e4066Sahrens 4388da6c28aaSamw case _PC_SATTR_ENABLED: 4389da6c28aaSamw case _PC_SATTR_EXISTS: 4390da6c28aaSamw *valp = vfs_has_feature(vp->v_vfsp, VFSFT_XVATTR) && 4391da6c28aaSamw (vp->v_type == VREG || vp->v_type == VDIR); 4392da6c28aaSamw return (0); 4393da6c28aaSamw 4394fa9e4066Sahrens case _PC_ACL_ENABLED: 4395fa9e4066Sahrens *valp = _ACL_ACE_ENABLED; 4396fa9e4066Sahrens return (0); 4397fa9e4066Sahrens 4398fa9e4066Sahrens case _PC_MIN_HOLE_SIZE: 4399fa9e4066Sahrens *valp = (ulong_t)SPA_MINBLOCKSIZE; 4400fa9e4066Sahrens return (0); 4401fa9e4066Sahrens 4402fa9e4066Sahrens default: 4403da6c28aaSamw return (fs_pathconf(vp, cmd, valp, cr, ct)); 4404fa9e4066Sahrens } 4405fa9e4066Sahrens } 4406fa9e4066Sahrens 4407fa9e4066Sahrens /*ARGSUSED*/ 4408fa9e4066Sahrens static int 4409da6c28aaSamw zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4410da6c28aaSamw caller_context_t *ct) 4411fa9e4066Sahrens { 4412fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4413fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4414fa9e4066Sahrens int error; 4415da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4416fa9e4066Sahrens 44173cb34c60Sahrens ZFS_ENTER(zfsvfs); 44183cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4419da6c28aaSamw error = zfs_getacl(zp, vsecp, skipaclchk, cr); 4420fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4421fa9e4066Sahrens 4422fa9e4066Sahrens return (error); 4423fa9e4066Sahrens } 4424fa9e4066Sahrens 4425fa9e4066Sahrens /*ARGSUSED*/ 4426fa9e4066Sahrens static int 4427da6c28aaSamw zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4428da6c28aaSamw caller_context_t *ct) 4429fa9e4066Sahrens { 4430fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4431fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4432fa9e4066Sahrens int error; 4433da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4434fa9e4066Sahrens 44353cb34c60Sahrens ZFS_ENTER(zfsvfs); 44363cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4437da6c28aaSamw error = zfs_setacl(zp, vsecp, skipaclchk, cr); 4438fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4439fa9e4066Sahrens return (error); 4440fa9e4066Sahrens } 4441fa9e4066Sahrens 4442fa9e4066Sahrens /* 4443fa9e4066Sahrens * Predeclare these here so that the compiler assumes that 4444fa9e4066Sahrens * this is an "old style" function declaration that does 4445fa9e4066Sahrens * not include arguments => we won't get type mismatch errors 4446fa9e4066Sahrens * in the initializations that follow. 4447fa9e4066Sahrens */ 4448fa9e4066Sahrens static int zfs_inval(); 4449fa9e4066Sahrens static int zfs_isdir(); 4450fa9e4066Sahrens 4451fa9e4066Sahrens static int 4452fa9e4066Sahrens zfs_inval() 4453fa9e4066Sahrens { 4454fa9e4066Sahrens return (EINVAL); 4455fa9e4066Sahrens } 4456fa9e4066Sahrens 4457fa9e4066Sahrens static int 4458fa9e4066Sahrens zfs_isdir() 4459fa9e4066Sahrens { 4460fa9e4066Sahrens return (EISDIR); 4461fa9e4066Sahrens } 4462fa9e4066Sahrens /* 4463fa9e4066Sahrens * Directory vnode operations template 4464fa9e4066Sahrens */ 4465fa9e4066Sahrens vnodeops_t *zfs_dvnodeops; 4466fa9e4066Sahrens const fs_operation_def_t zfs_dvnodeops_template[] = { 4467aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4468aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4469aa59c4cbSrsb VOPNAME_READ, { .error = zfs_isdir }, 4470aa59c4cbSrsb VOPNAME_WRITE, { .error = zfs_isdir }, 4471aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4472aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4473aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4474aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4475aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4476aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4477aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4478aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4479aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4480aa59c4cbSrsb VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, 4481aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4482aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4483aa59c4cbSrsb VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, 4484aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4485aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4486aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4487aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4488aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4489aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4490aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4491df2381bfSpraks VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4492aa59c4cbSrsb NULL, NULL 4493fa9e4066Sahrens }; 4494fa9e4066Sahrens 4495fa9e4066Sahrens /* 4496fa9e4066Sahrens * Regular file vnode operations template 4497fa9e4066Sahrens */ 4498fa9e4066Sahrens vnodeops_t *zfs_fvnodeops; 4499fa9e4066Sahrens const fs_operation_def_t zfs_fvnodeops_template[] = { 4500aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4501aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4502aa59c4cbSrsb VOPNAME_READ, { .vop_read = zfs_read }, 4503aa59c4cbSrsb VOPNAME_WRITE, { .vop_write = zfs_write }, 4504aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4505aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4506aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4507aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4508aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4509aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4510aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4511aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4512aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4513aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4514aa59c4cbSrsb VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, 4515aa59c4cbSrsb VOPNAME_SPACE, { .vop_space = zfs_space }, 4516aa59c4cbSrsb VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, 4517aa59c4cbSrsb VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, 4518aa59c4cbSrsb VOPNAME_MAP, { .vop_map = zfs_map }, 4519aa59c4cbSrsb VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, 4520aa59c4cbSrsb VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, 4521aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4522aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4523aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4524aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4525aa59c4cbSrsb NULL, NULL 4526fa9e4066Sahrens }; 4527fa9e4066Sahrens 4528fa9e4066Sahrens /* 4529fa9e4066Sahrens * Symbolic link vnode operations template 4530fa9e4066Sahrens */ 4531fa9e4066Sahrens vnodeops_t *zfs_symvnodeops; 4532fa9e4066Sahrens const fs_operation_def_t zfs_symvnodeops_template[] = { 4533aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4534aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4535aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4536aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4537aa59c4cbSrsb VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, 4538aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4539aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4540aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4541aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4542aa59c4cbSrsb NULL, NULL 4543fa9e4066Sahrens }; 4544fa9e4066Sahrens 4545fa9e4066Sahrens /* 4546fa9e4066Sahrens * Extended attribute directory vnode operations template 4547fa9e4066Sahrens * This template is identical to the directory vnodes 4548fa9e4066Sahrens * operation template except for restricted operations: 4549fa9e4066Sahrens * VOP_MKDIR() 4550fa9e4066Sahrens * VOP_SYMLINK() 4551fa9e4066Sahrens * Note that there are other restrictions embedded in: 4552fa9e4066Sahrens * zfs_create() - restrict type to VREG 4553fa9e4066Sahrens * zfs_link() - no links into/out of attribute space 4554fa9e4066Sahrens * zfs_rename() - no moves into/out of attribute space 4555fa9e4066Sahrens */ 4556fa9e4066Sahrens vnodeops_t *zfs_xdvnodeops; 4557fa9e4066Sahrens const fs_operation_def_t zfs_xdvnodeops_template[] = { 4558aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4559aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4560aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4561aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4562aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4563aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4564aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4565aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4566aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4567aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4568aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4569aa59c4cbSrsb VOPNAME_MKDIR, { .error = zfs_inval }, 4570aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4571aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4572aa59c4cbSrsb VOPNAME_SYMLINK, { .error = zfs_inval }, 4573aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4574aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4575aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4576aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4577aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4578aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4579aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4580aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4581aa59c4cbSrsb NULL, NULL 4582fa9e4066Sahrens }; 4583fa9e4066Sahrens 4584fa9e4066Sahrens /* 4585fa9e4066Sahrens * Error vnode operations template 4586fa9e4066Sahrens */ 4587fa9e4066Sahrens vnodeops_t *zfs_evnodeops; 4588fa9e4066Sahrens const fs_operation_def_t zfs_evnodeops_template[] = { 4589aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4590aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4591aa59c4cbSrsb NULL, NULL 4592fa9e4066Sahrens }; 4593