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 /* 22893a6d32Sahrens * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27fa9e4066Sahrens 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> 35fa9e4066Sahrens #include <sys/vnode.h> 36fa9e4066Sahrens #include <sys/file.h> 37fa9e4066Sahrens #include <sys/stat.h> 38fa9e4066Sahrens #include <sys/kmem.h> 39fa9e4066Sahrens #include <sys/taskq.h> 40fa9e4066Sahrens #include <sys/uio.h> 41fa9e4066Sahrens #include <sys/vmsystm.h> 42fa9e4066Sahrens #include <sys/atomic.h> 4344eda4d7Smaybee #include <sys/vm.h> 44fa9e4066Sahrens #include <vm/seg_vn.h> 45fa9e4066Sahrens #include <vm/pvn.h> 46fa9e4066Sahrens #include <vm/as.h> 47fa9e4066Sahrens #include <sys/mman.h> 48fa9e4066Sahrens #include <sys/pathname.h> 49fa9e4066Sahrens #include <sys/cmn_err.h> 50fa9e4066Sahrens #include <sys/errno.h> 51fa9e4066Sahrens #include <sys/unistd.h> 52fa9e4066Sahrens #include <sys/zfs_vfsops.h> 53fa9e4066Sahrens #include <sys/zfs_dir.h> 54fa9e4066Sahrens #include <sys/zfs_acl.h> 55fa9e4066Sahrens #include <sys/zfs_ioctl.h> 56fa9e4066Sahrens #include <sys/fs/zfs.h> 57fa9e4066Sahrens #include <sys/dmu.h> 58fa9e4066Sahrens #include <sys/spa.h> 59fa9e4066Sahrens #include <sys/txg.h> 60fa9e4066Sahrens #include <sys/dbuf.h> 61fa9e4066Sahrens #include <sys/zap.h> 62fa9e4066Sahrens #include <sys/dirent.h> 63fa9e4066Sahrens #include <sys/policy.h> 64fa9e4066Sahrens #include <sys/sunddi.h> 65fa9e4066Sahrens #include <sys/filio.h> 66fa9e4066Sahrens #include "fs/fs_subr.h" 67fa9e4066Sahrens #include <sys/zfs_ctldir.h> 68033f9833Sek #include <sys/dnlc.h> 69104e2ed7Sperrin #include <sys/zfs_rlock.h> 70fa9e4066Sahrens 71fa9e4066Sahrens /* 72fa9e4066Sahrens * Programming rules. 73fa9e4066Sahrens * 74fa9e4066Sahrens * Each vnode op performs some logical unit of work. To do this, the ZPL must 75fa9e4066Sahrens * properly lock its in-core state, create a DMU transaction, do the work, 76fa9e4066Sahrens * record this work in the intent log (ZIL), commit the DMU transaction, 77fa9e4066Sahrens * and wait the the intent log to commit if it's is a synchronous operation. 78fa9e4066Sahrens * Morover, the vnode ops must work in both normal and log replay context. 79fa9e4066Sahrens * The ordering of events is important to avoid deadlocks and references 80fa9e4066Sahrens * to freed memory. The example below illustrates the following Big Rules: 81fa9e4066Sahrens * 82fa9e4066Sahrens * (1) A check must be made in each zfs thread for a mounted file system. 83fa9e4066Sahrens * This is done avoiding races using ZFS_ENTER(zfsvfs). 84fa9e4066Sahrens * A ZFS_EXIT(zfsvfs) is needed before all returns. 85fa9e4066Sahrens * 86fa9e4066Sahrens * (2) VN_RELE() should always be the last thing except for zil_commit() 87b19a79ecSperrin * (if necessary) and ZFS_EXIT(). This is for 3 reasons: 88fa9e4066Sahrens * First, if it's the last reference, the vnode/znode 89fa9e4066Sahrens * can be freed, so the zp may point to freed memory. Second, the last 90fa9e4066Sahrens * reference will call zfs_zinactive(), which may induce a lot of work -- 91104e2ed7Sperrin * pushing cached pages (which acquires range locks) and syncing out 92fa9e4066Sahrens * cached atime changes. Third, zfs_zinactive() may require a new tx, 93fa9e4066Sahrens * which could deadlock the system if you were already holding one. 94fa9e4066Sahrens * 957885c754Sperrin * (3) All range locks must be grabbed before calling dmu_tx_assign(), 967885c754Sperrin * as they can span dmu_tx_assign() calls. 977885c754Sperrin * 987885c754Sperrin * (4) Always pass zfsvfs->z_assign as the second argument to dmu_tx_assign(). 99fa9e4066Sahrens * In normal operation, this will be TXG_NOWAIT. During ZIL replay, 100fa9e4066Sahrens * it will be a specific txg. Either way, dmu_tx_assign() never blocks. 101fa9e4066Sahrens * This is critical because we don't want to block while holding locks. 102fa9e4066Sahrens * Note, in particular, that if a lock is sometimes acquired before 103fa9e4066Sahrens * the tx assigns, and sometimes after (e.g. z_lock), then failing to 104fa9e4066Sahrens * use a non-blocking assign can deadlock the system. The scenario: 105fa9e4066Sahrens * 106fa9e4066Sahrens * Thread A has grabbed a lock before calling dmu_tx_assign(). 107fa9e4066Sahrens * Thread B is in an already-assigned tx, and blocks for this lock. 108fa9e4066Sahrens * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 109fa9e4066Sahrens * forever, because the previous txg can't quiesce until B's tx commits. 110fa9e4066Sahrens * 111fa9e4066Sahrens * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 1128a2f1b91Sahrens * then drop all locks, call dmu_tx_wait(), and try again. 113fa9e4066Sahrens * 1147885c754Sperrin * (5) If the operation succeeded, generate the intent log entry for it 115fa9e4066Sahrens * before dropping locks. This ensures that the ordering of events 116fa9e4066Sahrens * in the intent log matches the order in which they actually occurred. 117fa9e4066Sahrens * 1187885c754Sperrin * (6) At the end of each vnode op, the DMU tx must always commit, 119fa9e4066Sahrens * regardless of whether there were any errors. 120fa9e4066Sahrens * 121b19a79ecSperrin * (7) After dropping all locks, invoke zil_commit(zilog, seq, foid) 122fa9e4066Sahrens * to ensure that synchronous semantics are provided when necessary. 123fa9e4066Sahrens * 124fa9e4066Sahrens * In general, this is how things should be ordered in each vnode op: 125fa9e4066Sahrens * 126fa9e4066Sahrens * ZFS_ENTER(zfsvfs); // exit if unmounted 127fa9e4066Sahrens * top: 128fa9e4066Sahrens * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 129fa9e4066Sahrens * rw_enter(...); // grab any other locks you need 130fa9e4066Sahrens * tx = dmu_tx_create(...); // get DMU tx 131fa9e4066Sahrens * dmu_tx_hold_*(); // hold each object you might modify 132fa9e4066Sahrens * error = dmu_tx_assign(tx, zfsvfs->z_assign); // try to assign 133fa9e4066Sahrens * if (error) { 134fa9e4066Sahrens * rw_exit(...); // drop locks 135fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 136fa9e4066Sahrens * VN_RELE(...); // release held vnodes 137fa9e4066Sahrens * if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 1388a2f1b91Sahrens * dmu_tx_wait(tx); 1398a2f1b91Sahrens * dmu_tx_abort(tx); 140fa9e4066Sahrens * goto top; 141fa9e4066Sahrens * } 1428a2f1b91Sahrens * dmu_tx_abort(tx); // abort DMU tx 143fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 144fa9e4066Sahrens * return (error); // really out of space 145fa9e4066Sahrens * } 146fa9e4066Sahrens * error = do_real_work(); // do whatever this VOP does 147fa9e4066Sahrens * if (error == 0) 148b19a79ecSperrin * zfs_log_*(...); // on success, make ZIL entry 149fa9e4066Sahrens * dmu_tx_commit(tx); // commit DMU tx -- error or not 150fa9e4066Sahrens * rw_exit(...); // drop locks 151fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 152fa9e4066Sahrens * VN_RELE(...); // release held vnodes 153b19a79ecSperrin * zil_commit(zilog, seq, foid); // synchronous when necessary 154fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 155fa9e4066Sahrens * return (error); // done, report error 156fa9e4066Sahrens */ 157fa9e4066Sahrens /* ARGSUSED */ 158fa9e4066Sahrens static int 159fa9e4066Sahrens zfs_open(vnode_t **vpp, int flag, cred_t *cr) 160fa9e4066Sahrens { 16167bd71c6Sperrin znode_t *zp = VTOZ(*vpp); 16267bd71c6Sperrin 16367bd71c6Sperrin /* Keep a count of the synchronous opens in the znode */ 16467bd71c6Sperrin if (flag & (FSYNC | FDSYNC)) 16567bd71c6Sperrin atomic_inc_32(&zp->z_sync_cnt); 166fa9e4066Sahrens return (0); 167fa9e4066Sahrens } 168fa9e4066Sahrens 169fa9e4066Sahrens /* ARGSUSED */ 170fa9e4066Sahrens static int 171fa9e4066Sahrens zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr) 172fa9e4066Sahrens { 17367bd71c6Sperrin znode_t *zp = VTOZ(vp); 17467bd71c6Sperrin 17567bd71c6Sperrin /* Decrement the synchronous opens in the znode */ 17667bd71c6Sperrin if (flag & (FSYNC | FDSYNC)) 17767bd71c6Sperrin atomic_dec_32(&zp->z_sync_cnt); 17867bd71c6Sperrin 179fa9e4066Sahrens /* 180fa9e4066Sahrens * Clean up any locks held by this process on the vp. 181fa9e4066Sahrens */ 182fa9e4066Sahrens cleanlocks(vp, ddi_get_pid(), 0); 183fa9e4066Sahrens cleanshares(vp, ddi_get_pid()); 184fa9e4066Sahrens 185fa9e4066Sahrens return (0); 186fa9e4066Sahrens } 187fa9e4066Sahrens 188fa9e4066Sahrens /* 189fa9e4066Sahrens * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 190fa9e4066Sahrens * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 191fa9e4066Sahrens */ 192fa9e4066Sahrens static int 193fa9e4066Sahrens zfs_holey(vnode_t *vp, int cmd, offset_t *off) 194fa9e4066Sahrens { 195fa9e4066Sahrens znode_t *zp = VTOZ(vp); 196fa9e4066Sahrens uint64_t noff = (uint64_t)*off; /* new offset */ 197fa9e4066Sahrens uint64_t file_sz; 198fa9e4066Sahrens int error; 199fa9e4066Sahrens boolean_t hole; 200fa9e4066Sahrens 201fa9e4066Sahrens file_sz = zp->z_phys->zp_size; 202fa9e4066Sahrens if (noff >= file_sz) { 203fa9e4066Sahrens return (ENXIO); 204fa9e4066Sahrens } 205fa9e4066Sahrens 206fa9e4066Sahrens if (cmd == _FIO_SEEK_HOLE) 207fa9e4066Sahrens hole = B_TRUE; 208fa9e4066Sahrens else 209fa9e4066Sahrens hole = B_FALSE; 210fa9e4066Sahrens 211fa9e4066Sahrens error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 212fa9e4066Sahrens 213fa9e4066Sahrens /* end of file? */ 214fa9e4066Sahrens if ((error == ESRCH) || (noff > file_sz)) { 215fa9e4066Sahrens /* 216fa9e4066Sahrens * Handle the virtual hole at the end of file. 217fa9e4066Sahrens */ 218fa9e4066Sahrens if (hole) { 219fa9e4066Sahrens *off = file_sz; 220fa9e4066Sahrens return (0); 221fa9e4066Sahrens } 222fa9e4066Sahrens return (ENXIO); 223fa9e4066Sahrens } 224fa9e4066Sahrens 225fa9e4066Sahrens if (noff < *off) 226fa9e4066Sahrens return (error); 227fa9e4066Sahrens *off = noff; 228fa9e4066Sahrens return (error); 229fa9e4066Sahrens } 230fa9e4066Sahrens 231fa9e4066Sahrens /* ARGSUSED */ 232fa9e4066Sahrens static int 233fa9e4066Sahrens zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred, 234fa9e4066Sahrens int *rvalp) 235fa9e4066Sahrens { 236fa9e4066Sahrens offset_t off; 237fa9e4066Sahrens int error; 238fa9e4066Sahrens zfsvfs_t *zfsvfs; 239fa9e4066Sahrens 240fa9e4066Sahrens switch (com) { 241fa9e4066Sahrens case _FIOFFS: 242fa9e4066Sahrens return (zfs_sync(vp->v_vfsp, 0, cred)); 243fa9e4066Sahrens 244ea8dc4b6Seschrock /* 245ea8dc4b6Seschrock * The following two ioctls are used by bfu. Faking out, 246ea8dc4b6Seschrock * necessary to avoid bfu errors. 247ea8dc4b6Seschrock */ 248ea8dc4b6Seschrock case _FIOGDIO: 249ea8dc4b6Seschrock case _FIOSDIO: 250ea8dc4b6Seschrock return (0); 251ea8dc4b6Seschrock 252fa9e4066Sahrens case _FIO_SEEK_DATA: 253fa9e4066Sahrens case _FIO_SEEK_HOLE: 254fa9e4066Sahrens if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 255fa9e4066Sahrens return (EFAULT); 256fa9e4066Sahrens 257fa9e4066Sahrens zfsvfs = VTOZ(vp)->z_zfsvfs; 258fa9e4066Sahrens ZFS_ENTER(zfsvfs); 259fa9e4066Sahrens 260fa9e4066Sahrens /* offset parameter is in/out */ 261fa9e4066Sahrens error = zfs_holey(vp, com, &off); 262fa9e4066Sahrens ZFS_EXIT(zfsvfs); 263fa9e4066Sahrens if (error) 264fa9e4066Sahrens return (error); 265fa9e4066Sahrens if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 266fa9e4066Sahrens return (EFAULT); 267fa9e4066Sahrens return (0); 268fa9e4066Sahrens } 269fa9e4066Sahrens return (ENOTTY); 270fa9e4066Sahrens } 271fa9e4066Sahrens 272fa9e4066Sahrens /* 273fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 274fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 275fa9e4066Sahrens * 276fa9e4066Sahrens * On Write: If we find a memory mapped page, we write to *both* 277fa9e4066Sahrens * the page and the dmu buffer. 278fa9e4066Sahrens * 279fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 280fa9e4066Sahrens * the file is memory mapped. 281fa9e4066Sahrens */ 282fa9e4066Sahrens static int 283*feb08c6bSbillm mappedwrite(vnode_t *vp, int nbytes, uio_t *uio, dmu_tx_t *tx) 284fa9e4066Sahrens { 285fa9e4066Sahrens znode_t *zp = VTOZ(vp); 286fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 287fa9e4066Sahrens int64_t start, off; 288fa9e4066Sahrens int len = nbytes; 289fa9e4066Sahrens int error = 0; 290fa9e4066Sahrens 291fa9e4066Sahrens start = uio->uio_loffset; 292fa9e4066Sahrens off = start & PAGEOFFSET; 293fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 294fa9e4066Sahrens page_t *pp; 295fa9e4066Sahrens uint64_t bytes = MIN(PAGESIZE - off, len); 296*feb08c6bSbillm uint64_t woff = uio->uio_loffset; 297fa9e4066Sahrens 298fa9e4066Sahrens /* 299fa9e4066Sahrens * We don't want a new page to "appear" in the middle of 300fa9e4066Sahrens * the file update (because it may not get the write 301fa9e4066Sahrens * update data), so we grab a lock to block 302fa9e4066Sahrens * zfs_getpage(). 303fa9e4066Sahrens */ 304fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 305fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 306fa9e4066Sahrens caddr_t va; 307fa9e4066Sahrens 308fa9e4066Sahrens rw_exit(&zp->z_map_lock); 309fa9e4066Sahrens va = ppmapin(pp, PROT_READ | PROT_WRITE, (caddr_t)-1L); 310fa9e4066Sahrens error = uiomove(va+off, bytes, UIO_WRITE, uio); 311fa9e4066Sahrens if (error == 0) { 312fa9e4066Sahrens dmu_write(zfsvfs->z_os, zp->z_id, 313fa9e4066Sahrens woff, bytes, va+off, tx); 314fa9e4066Sahrens } 315fa9e4066Sahrens ppmapout(va); 316fa9e4066Sahrens page_unlock(pp); 317fa9e4066Sahrens } else { 318fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 319*feb08c6bSbillm uio, bytes, tx); 320fa9e4066Sahrens rw_exit(&zp->z_map_lock); 321fa9e4066Sahrens } 322fa9e4066Sahrens len -= bytes; 323fa9e4066Sahrens off = 0; 324fa9e4066Sahrens if (error) 325fa9e4066Sahrens break; 326fa9e4066Sahrens } 327fa9e4066Sahrens return (error); 328fa9e4066Sahrens } 329fa9e4066Sahrens 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 Read: We "read" preferentially from memory mapped pages, 335fa9e4066Sahrens * else we default from 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 341*feb08c6bSbillm mappedread(vnode_t *vp, int nbytes, uio_t *uio) 342fa9e4066Sahrens { 343*feb08c6bSbillm znode_t *zp = VTOZ(vp); 344*feb08c6bSbillm objset_t *os = zp->z_zfsvfs->z_os; 345*feb08c6bSbillm 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; 353*feb08c6bSbillm uint64_t bytes = MIN(PAGESIZE - off, len); 354fa9e4066Sahrens 355fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 356fa9e4066Sahrens caddr_t va; 357fa9e4066Sahrens 35844eda4d7Smaybee va = ppmapin(pp, PROT_READ, (caddr_t)-1L); 359fa9e4066Sahrens error = uiomove(va + off, bytes, UIO_READ, uio); 360fa9e4066Sahrens ppmapout(va); 361fa9e4066Sahrens page_unlock(pp); 362fa9e4066Sahrens } else { 363*feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, bytes); 364fa9e4066Sahrens } 365fa9e4066Sahrens len -= bytes; 366fa9e4066Sahrens off = 0; 367fa9e4066Sahrens if (error) 368fa9e4066Sahrens break; 369fa9e4066Sahrens } 370fa9e4066Sahrens return (error); 371fa9e4066Sahrens } 372fa9e4066Sahrens 373*feb08c6bSbillm offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 374fa9e4066Sahrens 375fa9e4066Sahrens /* 376fa9e4066Sahrens * Read bytes from specified file into supplied buffer. 377fa9e4066Sahrens * 378fa9e4066Sahrens * IN: vp - vnode of file to be read from. 379fa9e4066Sahrens * uio - structure supplying read location, range info, 380fa9e4066Sahrens * and return buffer. 381fa9e4066Sahrens * ioflag - SYNC flags; used to provide FRSYNC semantics. 382fa9e4066Sahrens * cr - credentials of caller. 383fa9e4066Sahrens * 384fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 385fa9e4066Sahrens * 386fa9e4066Sahrens * RETURN: 0 if success 387fa9e4066Sahrens * error code if failure 388fa9e4066Sahrens * 389fa9e4066Sahrens * Side Effects: 390fa9e4066Sahrens * vp - atime updated if byte count > 0 391fa9e4066Sahrens */ 392fa9e4066Sahrens /* ARGSUSED */ 393fa9e4066Sahrens static int 394fa9e4066Sahrens zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 395fa9e4066Sahrens { 396fa9e4066Sahrens znode_t *zp = VTOZ(vp); 397fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 398*feb08c6bSbillm objset_t *os = zfsvfs->z_os; 399*feb08c6bSbillm ssize_t n, nbytes; 400*feb08c6bSbillm int error; 401104e2ed7Sperrin rl_t *rl; 402fa9e4066Sahrens 403fa9e4066Sahrens ZFS_ENTER(zfsvfs); 404fa9e4066Sahrens 405fa9e4066Sahrens /* 406fa9e4066Sahrens * Validate file offset 407fa9e4066Sahrens */ 408fa9e4066Sahrens if (uio->uio_loffset < (offset_t)0) { 409fa9e4066Sahrens ZFS_EXIT(zfsvfs); 410fa9e4066Sahrens return (EINVAL); 411fa9e4066Sahrens } 412fa9e4066Sahrens 413fa9e4066Sahrens /* 414fa9e4066Sahrens * Fasttrack empty reads 415fa9e4066Sahrens */ 416fa9e4066Sahrens if (uio->uio_resid == 0) { 417fa9e4066Sahrens ZFS_EXIT(zfsvfs); 418fa9e4066Sahrens return (0); 419fa9e4066Sahrens } 420fa9e4066Sahrens 421fa9e4066Sahrens /* 422104e2ed7Sperrin * Check for mandatory locks 423fa9e4066Sahrens */ 424fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode)) { 425fa9e4066Sahrens if (error = chklock(vp, FREAD, 426fa9e4066Sahrens uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 427fa9e4066Sahrens ZFS_EXIT(zfsvfs); 428fa9e4066Sahrens return (error); 429fa9e4066Sahrens } 430fa9e4066Sahrens } 431fa9e4066Sahrens 432fa9e4066Sahrens /* 433fa9e4066Sahrens * If we're in FRSYNC mode, sync out this znode before reading it. 434fa9e4066Sahrens */ 435b19a79ecSperrin if (ioflag & FRSYNC) 436b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 437fa9e4066Sahrens 438fa9e4066Sahrens /* 439104e2ed7Sperrin * Lock the range against changes. 440fa9e4066Sahrens */ 441104e2ed7Sperrin rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER); 442104e2ed7Sperrin 443fa9e4066Sahrens /* 444fa9e4066Sahrens * If we are reading past end-of-file we can skip 445fa9e4066Sahrens * to the end; but we might still need to set atime. 446fa9e4066Sahrens */ 447fa9e4066Sahrens if (uio->uio_loffset >= zp->z_phys->zp_size) { 448fa9e4066Sahrens error = 0; 449fa9e4066Sahrens goto out; 450fa9e4066Sahrens } 451fa9e4066Sahrens 452*feb08c6bSbillm ASSERT(uio->uio_loffset < zp->z_phys->zp_size); 453*feb08c6bSbillm n = MIN(uio->uio_resid, zp->z_phys->zp_size - uio->uio_loffset); 454*feb08c6bSbillm 455*feb08c6bSbillm while (n > 0) { 456*feb08c6bSbillm nbytes = MIN(n, zfs_read_chunk_size - 457*feb08c6bSbillm P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); 458fa9e4066Sahrens 459*feb08c6bSbillm if (vn_has_cached_data(vp)) 460*feb08c6bSbillm error = mappedread(vp, nbytes, uio); 461*feb08c6bSbillm else 462*feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, nbytes); 463ea8dc4b6Seschrock if (error) 464*feb08c6bSbillm break; 465fa9e4066Sahrens 466*feb08c6bSbillm n -= nbytes; 467fa9e4066Sahrens } 468*feb08c6bSbillm 469fa9e4066Sahrens out: 470c5c6ffa0Smaybee zfs_range_unlock(rl); 471fa9e4066Sahrens 472fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 473fa9e4066Sahrens ZFS_EXIT(zfsvfs); 474fa9e4066Sahrens return (error); 475fa9e4066Sahrens } 476fa9e4066Sahrens 477fa9e4066Sahrens /* 478fa9e4066Sahrens * Fault in the pages of the first n bytes specified by the uio structure. 479fa9e4066Sahrens * 1 byte in each page is touched and the uio struct is unmodified. 480fa9e4066Sahrens * Any error will exit this routine as this is only a best 481fa9e4066Sahrens * attempt to get the pages resident. This is a copy of ufs_trans_touch(). 482fa9e4066Sahrens */ 483fa9e4066Sahrens static void 484fa9e4066Sahrens zfs_prefault_write(ssize_t n, struct uio *uio) 485fa9e4066Sahrens { 486fa9e4066Sahrens struct iovec *iov; 487fa9e4066Sahrens ulong_t cnt, incr; 488fa9e4066Sahrens caddr_t p; 489fa9e4066Sahrens uint8_t tmp; 490fa9e4066Sahrens 491fa9e4066Sahrens iov = uio->uio_iov; 492fa9e4066Sahrens 493fa9e4066Sahrens while (n) { 494fa9e4066Sahrens cnt = MIN(iov->iov_len, n); 495fa9e4066Sahrens if (cnt == 0) { 496fa9e4066Sahrens /* empty iov entry */ 497fa9e4066Sahrens iov++; 498fa9e4066Sahrens continue; 499fa9e4066Sahrens } 500fa9e4066Sahrens n -= cnt; 501fa9e4066Sahrens /* 502fa9e4066Sahrens * touch each page in this segment. 503fa9e4066Sahrens */ 504fa9e4066Sahrens p = iov->iov_base; 505fa9e4066Sahrens while (cnt) { 506fa9e4066Sahrens switch (uio->uio_segflg) { 507fa9e4066Sahrens case UIO_USERSPACE: 508fa9e4066Sahrens case UIO_USERISPACE: 509fa9e4066Sahrens if (fuword8(p, &tmp)) 510fa9e4066Sahrens return; 511fa9e4066Sahrens break; 512fa9e4066Sahrens case UIO_SYSSPACE: 513fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 514fa9e4066Sahrens return; 515fa9e4066Sahrens break; 516fa9e4066Sahrens } 517fa9e4066Sahrens incr = MIN(cnt, PAGESIZE); 518fa9e4066Sahrens p += incr; 519fa9e4066Sahrens cnt -= incr; 520fa9e4066Sahrens } 521fa9e4066Sahrens /* 522fa9e4066Sahrens * touch the last byte in case it straddles a page. 523fa9e4066Sahrens */ 524fa9e4066Sahrens p--; 525fa9e4066Sahrens switch (uio->uio_segflg) { 526fa9e4066Sahrens case UIO_USERSPACE: 527fa9e4066Sahrens case UIO_USERISPACE: 528fa9e4066Sahrens if (fuword8(p, &tmp)) 529fa9e4066Sahrens return; 530fa9e4066Sahrens break; 531fa9e4066Sahrens case UIO_SYSSPACE: 532fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 533fa9e4066Sahrens return; 534fa9e4066Sahrens break; 535fa9e4066Sahrens } 536fa9e4066Sahrens iov++; 537fa9e4066Sahrens } 538fa9e4066Sahrens } 539fa9e4066Sahrens 540fa9e4066Sahrens /* 541fa9e4066Sahrens * Write the bytes to a file. 542fa9e4066Sahrens * 543fa9e4066Sahrens * IN: vp - vnode of file to be written to. 544fa9e4066Sahrens * uio - structure supplying write location, range info, 545fa9e4066Sahrens * and data buffer. 546fa9e4066Sahrens * ioflag - FAPPEND flag set if in append mode. 547fa9e4066Sahrens * cr - credentials of caller. 548fa9e4066Sahrens * 549fa9e4066Sahrens * OUT: uio - updated offset and range. 550fa9e4066Sahrens * 551fa9e4066Sahrens * RETURN: 0 if success 552fa9e4066Sahrens * error code if failure 553fa9e4066Sahrens * 554fa9e4066Sahrens * Timestamps: 555fa9e4066Sahrens * vp - ctime|mtime updated if byte count > 0 556fa9e4066Sahrens */ 557fa9e4066Sahrens /* ARGSUSED */ 558fa9e4066Sahrens static int 559fa9e4066Sahrens zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 560fa9e4066Sahrens { 561fa9e4066Sahrens znode_t *zp = VTOZ(vp); 562fa9e4066Sahrens rlim64_t limit = uio->uio_llimit; 563fa9e4066Sahrens ssize_t start_resid = uio->uio_resid; 564fa9e4066Sahrens ssize_t tx_bytes; 565fa9e4066Sahrens uint64_t end_size; 566fa9e4066Sahrens dmu_tx_t *tx; 567fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 568fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 569fa9e4066Sahrens offset_t woff; 570fa9e4066Sahrens ssize_t n, nbytes; 571104e2ed7Sperrin rl_t *rl; 572fa9e4066Sahrens int max_blksz = zfsvfs->z_max_blksz; 573104e2ed7Sperrin int error; 574fa9e4066Sahrens 575fa9e4066Sahrens /* 576fa9e4066Sahrens * Fasttrack empty write 577fa9e4066Sahrens */ 578104e2ed7Sperrin n = start_resid; 579fa9e4066Sahrens if (n == 0) 580fa9e4066Sahrens return (0); 581fa9e4066Sahrens 582104e2ed7Sperrin if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 583104e2ed7Sperrin limit = MAXOFFSET_T; 584104e2ed7Sperrin 585fa9e4066Sahrens ZFS_ENTER(zfsvfs); 586fa9e4066Sahrens 587fa9e4066Sahrens /* 588c5c6ffa0Smaybee * Pre-fault the pages to ensure slow (eg NFS) pages 589104e2ed7Sperrin * don't hold up txg. 590fa9e4066Sahrens */ 591c5c6ffa0Smaybee zfs_prefault_write(n, uio); 592fa9e4066Sahrens 593fa9e4066Sahrens /* 594fa9e4066Sahrens * If in append mode, set the io offset pointer to eof. 595fa9e4066Sahrens */ 596104e2ed7Sperrin if (ioflag & FAPPEND) { 597104e2ed7Sperrin /* 598104e2ed7Sperrin * Range lock for a file append: 599104e2ed7Sperrin * The value for the start of range will be determined by 600104e2ed7Sperrin * zfs_range_lock() (to guarantee append semantics). 601104e2ed7Sperrin * If this write will cause the block size to increase, 602104e2ed7Sperrin * zfs_range_lock() will lock the entire file, so we must 603104e2ed7Sperrin * later reduce the range after we grow the block size. 604104e2ed7Sperrin */ 605104e2ed7Sperrin rl = zfs_range_lock(zp, 0, n, RL_APPEND); 606104e2ed7Sperrin if (rl->r_len == UINT64_MAX) { 607104e2ed7Sperrin /* overlocked, zp_size can't change */ 608104e2ed7Sperrin woff = uio->uio_loffset = zp->z_phys->zp_size; 609104e2ed7Sperrin } else { 610104e2ed7Sperrin woff = uio->uio_loffset = rl->r_off; 611104e2ed7Sperrin } 612fa9e4066Sahrens } else { 613fa9e4066Sahrens woff = uio->uio_loffset; 614fa9e4066Sahrens /* 615fa9e4066Sahrens * Validate file offset 616fa9e4066Sahrens */ 617fa9e4066Sahrens if (woff < 0) { 618fa9e4066Sahrens ZFS_EXIT(zfsvfs); 619fa9e4066Sahrens return (EINVAL); 620fa9e4066Sahrens } 621fa9e4066Sahrens 622fa9e4066Sahrens /* 623104e2ed7Sperrin * If we need to grow the block size then zfs_range_lock() 624104e2ed7Sperrin * will lock a wider range than we request here. 625104e2ed7Sperrin * Later after growing the block size we reduce the range. 626fa9e4066Sahrens */ 627104e2ed7Sperrin rl = zfs_range_lock(zp, woff, n, RL_WRITER); 628fa9e4066Sahrens } 629fa9e4066Sahrens 630fa9e4066Sahrens if (woff >= limit) { 631*feb08c6bSbillm zfs_range_unlock(rl); 632*feb08c6bSbillm ZFS_EXIT(zfsvfs); 633*feb08c6bSbillm return (EFBIG); 634fa9e4066Sahrens } 635fa9e4066Sahrens 636fa9e4066Sahrens if ((woff + n) > limit || woff > (limit - n)) 637fa9e4066Sahrens n = limit - woff; 638fa9e4066Sahrens 639fa9e4066Sahrens /* 640104e2ed7Sperrin * Check for mandatory locks 641fa9e4066Sahrens */ 642fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode) && 643*feb08c6bSbillm (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 644*feb08c6bSbillm zfs_range_unlock(rl); 645*feb08c6bSbillm ZFS_EXIT(zfsvfs); 646*feb08c6bSbillm return (error); 647fa9e4066Sahrens } 648*feb08c6bSbillm end_size = MAX(zp->z_phys->zp_size, woff + n); 649fa9e4066Sahrens 650104e2ed7Sperrin /* 651*feb08c6bSbillm * Write the file in reasonable size chunks. Each chunk is written 652*feb08c6bSbillm * in a separate transaction; this keeps the intent log records small 653*feb08c6bSbillm * and allows us to do more fine-grained space accounting. 654104e2ed7Sperrin */ 655*feb08c6bSbillm while (n > 0) { 656*feb08c6bSbillm /* 657*feb08c6bSbillm * Start a transaction. 658*feb08c6bSbillm */ 659*feb08c6bSbillm woff = uio->uio_loffset; 660*feb08c6bSbillm tx = dmu_tx_create(zfsvfs->z_os); 661*feb08c6bSbillm dmu_tx_hold_bonus(tx, zp->z_id); 662*feb08c6bSbillm dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 663*feb08c6bSbillm error = dmu_tx_assign(tx, zfsvfs->z_assign); 664*feb08c6bSbillm if (error) { 665*feb08c6bSbillm if (error == ERESTART && 666*feb08c6bSbillm zfsvfs->z_assign == TXG_NOWAIT) { 667*feb08c6bSbillm dmu_tx_wait(tx); 668*feb08c6bSbillm dmu_tx_abort(tx); 669*feb08c6bSbillm continue; 670*feb08c6bSbillm } 671*feb08c6bSbillm dmu_tx_abort(tx); 672*feb08c6bSbillm break; 673*feb08c6bSbillm } 674104e2ed7Sperrin 675*feb08c6bSbillm /* 676*feb08c6bSbillm * If zfs_range_lock() over-locked we grow the blocksize 677*feb08c6bSbillm * and then reduce the lock range. This will only happen 678*feb08c6bSbillm * on the first iteration since zfs_range_reduce() will 679*feb08c6bSbillm * shrink down r_len to the appropriate size. 680*feb08c6bSbillm */ 681*feb08c6bSbillm if (rl->r_len == UINT64_MAX) { 682*feb08c6bSbillm uint64_t new_blksz; 683*feb08c6bSbillm 684*feb08c6bSbillm if (zp->z_blksz > max_blksz) { 685*feb08c6bSbillm ASSERT(!ISP2(zp->z_blksz)); 686*feb08c6bSbillm new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 687*feb08c6bSbillm } else { 688*feb08c6bSbillm new_blksz = MIN(end_size, max_blksz); 689*feb08c6bSbillm } 690*feb08c6bSbillm zfs_grow_blocksize(zp, new_blksz, tx); 691*feb08c6bSbillm zfs_range_reduce(rl, woff, n); 692fa9e4066Sahrens } 693fa9e4066Sahrens 694fa9e4066Sahrens /* 695fa9e4066Sahrens * XXX - should we really limit each write to z_max_blksz? 696fa9e4066Sahrens * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 697fa9e4066Sahrens */ 698fa9e4066Sahrens nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 699fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_READER); 700fa9e4066Sahrens 701fa9e4066Sahrens tx_bytes = uio->uio_resid; 702fa9e4066Sahrens if (vn_has_cached_data(vp)) { 703fa9e4066Sahrens rw_exit(&zp->z_map_lock); 704*feb08c6bSbillm error = mappedwrite(vp, nbytes, uio, tx); 705fa9e4066Sahrens } else { 706fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 707*feb08c6bSbillm uio, nbytes, tx); 708fa9e4066Sahrens rw_exit(&zp->z_map_lock); 709fa9e4066Sahrens } 710fa9e4066Sahrens tx_bytes -= uio->uio_resid; 711fa9e4066Sahrens 712*feb08c6bSbillm /* 713*feb08c6bSbillm * If we made no progress, we're done. If we made even 714*feb08c6bSbillm * partial progress, update the znode and ZIL accordingly. 715*feb08c6bSbillm */ 716*feb08c6bSbillm if (tx_bytes == 0) { 717*feb08c6bSbillm ASSERT(error != 0); 718fa9e4066Sahrens break; 719fa9e4066Sahrens } 720fa9e4066Sahrens 721169cdae2Smarks /* 722169cdae2Smarks * Clear Set-UID/Set-GID bits on successful write if not 723169cdae2Smarks * privileged and at least one of the excute bits is set. 724169cdae2Smarks * 725169cdae2Smarks * It would be nice to to this after all writes have 726169cdae2Smarks * been done, but that would still expose the ISUID/ISGID 727169cdae2Smarks * to another app after the partial write is committed. 728169cdae2Smarks */ 729169cdae2Smarks mutex_enter(&zp->z_acl_lock); 730169cdae2Smarks if ((zp->z_phys->zp_mode & (S_IXUSR | (S_IXUSR >> 3) | 731169cdae2Smarks (S_IXUSR >> 6))) != 0 && 732169cdae2Smarks (zp->z_phys->zp_mode & (S_ISUID | S_ISGID)) != 0 && 733169cdae2Smarks secpolicy_vnode_setid_retain(cr, 734169cdae2Smarks (zp->z_phys->zp_mode & S_ISUID) != 0 && 735169cdae2Smarks zp->z_phys->zp_uid == 0) != 0) { 736169cdae2Smarks zp->z_phys->zp_mode &= ~(S_ISUID | S_ISGID); 737169cdae2Smarks } 738169cdae2Smarks mutex_exit(&zp->z_acl_lock); 739169cdae2Smarks 740fa9e4066Sahrens /* 741*feb08c6bSbillm * Update time stamp. NOTE: This marks the bonus buffer as 742*feb08c6bSbillm * dirty, so we don't have to do it again for zp_size. 743fa9e4066Sahrens */ 744fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 745fa9e4066Sahrens 746fa9e4066Sahrens /* 747*feb08c6bSbillm * Update the file size (zp_size) if it has changed; 748*feb08c6bSbillm * account for possible concurrent updates. 749fa9e4066Sahrens */ 750*feb08c6bSbillm while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) 751fa9e4066Sahrens (void) atomic_cas_64(&zp->z_phys->zp_size, end_size, 752fa9e4066Sahrens uio->uio_loffset); 753*feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 754*feb08c6bSbillm dmu_tx_commit(tx); 755fa9e4066Sahrens 756*feb08c6bSbillm if (error != 0) 757*feb08c6bSbillm break; 758*feb08c6bSbillm ASSERT(tx_bytes == nbytes); 759*feb08c6bSbillm n -= nbytes; 760*feb08c6bSbillm } 761fa9e4066Sahrens 762c5c6ffa0Smaybee zfs_range_unlock(rl); 763fa9e4066Sahrens 764fa9e4066Sahrens /* 765fa9e4066Sahrens * If we're in replay mode, or we made no progress, return error. 766fa9e4066Sahrens * Otherwise, it's at least a partial write, so it's successful. 767fa9e4066Sahrens */ 768fa9e4066Sahrens if (zfsvfs->z_assign >= TXG_INITIAL || uio->uio_resid == start_resid) { 769fa9e4066Sahrens ZFS_EXIT(zfsvfs); 770fa9e4066Sahrens return (error); 771fa9e4066Sahrens } 772fa9e4066Sahrens 773b19a79ecSperrin if (ioflag & (FSYNC | FDSYNC)) 774b19a79ecSperrin zil_commit(zilog, zp->z_last_itx, zp->z_id); 775fa9e4066Sahrens 776fa9e4066Sahrens ZFS_EXIT(zfsvfs); 777fa9e4066Sahrens return (0); 778fa9e4066Sahrens } 779fa9e4066Sahrens 780c5c6ffa0Smaybee void 78167bd71c6Sperrin zfs_get_done(dmu_buf_t *db, void *vzgd) 782c5c6ffa0Smaybee { 78367bd71c6Sperrin zgd_t *zgd = (zgd_t *)vzgd; 78467bd71c6Sperrin rl_t *rl = zgd->zgd_rl; 785c5c6ffa0Smaybee vnode_t *vp = ZTOV(rl->r_zp); 786c5c6ffa0Smaybee 78767bd71c6Sperrin dmu_buf_rele(db, vzgd); 788c5c6ffa0Smaybee zfs_range_unlock(rl); 789c5c6ffa0Smaybee VN_RELE(vp); 79067bd71c6Sperrin zil_add_vdev(zgd->zgd_zilog, DVA_GET_VDEV(BP_IDENTITY(zgd->zgd_bp))); 79167bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 792c5c6ffa0Smaybee } 793c5c6ffa0Smaybee 794fa9e4066Sahrens /* 795fa9e4066Sahrens * Get data to generate a TX_WRITE intent log record. 796fa9e4066Sahrens */ 797fa9e4066Sahrens int 798c5c6ffa0Smaybee zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) 799fa9e4066Sahrens { 800fa9e4066Sahrens zfsvfs_t *zfsvfs = arg; 801fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 802fa9e4066Sahrens znode_t *zp; 803fa9e4066Sahrens uint64_t off = lr->lr_offset; 804c5c6ffa0Smaybee dmu_buf_t *db; 805104e2ed7Sperrin rl_t *rl; 80667bd71c6Sperrin zgd_t *zgd; 807*feb08c6bSbillm int dlen = lr->lr_length; /* length of user data */ 808fa9e4066Sahrens int error = 0; 809fa9e4066Sahrens 81067bd71c6Sperrin ASSERT(zio); 811fa9e4066Sahrens ASSERT(dlen != 0); 812fa9e4066Sahrens 813fa9e4066Sahrens /* 814104e2ed7Sperrin * Nothing to do if the file has been removed 815fa9e4066Sahrens */ 816fa9e4066Sahrens if (zfs_zget(zfsvfs, lr->lr_foid, &zp) != 0) 817fa9e4066Sahrens return (ENOENT); 818893a6d32Sahrens if (zp->z_unlinked) { 819fa9e4066Sahrens VN_RELE(ZTOV(zp)); 820fa9e4066Sahrens return (ENOENT); 821fa9e4066Sahrens } 822fa9e4066Sahrens 823fa9e4066Sahrens /* 824fa9e4066Sahrens * Write records come in two flavors: immediate and indirect. 825fa9e4066Sahrens * For small writes it's cheaper to store the data with the 826fa9e4066Sahrens * log record (immediate); for large writes it's cheaper to 827fa9e4066Sahrens * sync the data and get a pointer to it (indirect) so that 828fa9e4066Sahrens * we don't have to write the data twice. 829fa9e4066Sahrens */ 830104e2ed7Sperrin if (buf != NULL) { /* immediate write */ 831104e2ed7Sperrin rl = zfs_range_lock(zp, off, dlen, RL_READER); 832104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 833104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 834104e2ed7Sperrin error = ENOENT; 835104e2ed7Sperrin goto out; 836104e2ed7Sperrin } 83710d957caSmaybee VERIFY(0 == dmu_read(os, lr->lr_foid, off, dlen, buf)); 838104e2ed7Sperrin } else { /* indirect write */ 839104e2ed7Sperrin uint64_t boff; /* block starting offset */ 840104e2ed7Sperrin 84110d957caSmaybee ASSERT3U(dlen, <=, zp->z_blksz); 842fa9e4066Sahrens /* 843104e2ed7Sperrin * Have to lock the whole block to ensure when it's 844104e2ed7Sperrin * written out and it's checksum is being calculated 845104e2ed7Sperrin * that no one can change the data. We need to re-check 846104e2ed7Sperrin * blocksize after we get the lock in case it's changed! 847fa9e4066Sahrens */ 848104e2ed7Sperrin for (;;) { 8495263255cSperrin if (ISP2(zp->z_blksz)) { 8505263255cSperrin boff = P2ALIGN_TYPED(off, zp->z_blksz, 8515263255cSperrin uint64_t); 8525263255cSperrin } else { 8535263255cSperrin boff = 0; 8545263255cSperrin } 855104e2ed7Sperrin dlen = zp->z_blksz; 856104e2ed7Sperrin rl = zfs_range_lock(zp, boff, dlen, RL_READER); 857104e2ed7Sperrin if (zp->z_blksz == dlen) 858104e2ed7Sperrin break; 859c5c6ffa0Smaybee zfs_range_unlock(rl); 860104e2ed7Sperrin } 861104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 862104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 863104e2ed7Sperrin error = ENOENT; 864104e2ed7Sperrin goto out; 865104e2ed7Sperrin } 86667bd71c6Sperrin zgd = (zgd_t *)kmem_alloc(sizeof (zgd_t), KM_SLEEP); 86767bd71c6Sperrin zgd->zgd_rl = rl; 86867bd71c6Sperrin zgd->zgd_zilog = zfsvfs->z_log; 86967bd71c6Sperrin zgd->zgd_bp = &lr->lr_blkptr; 87067bd71c6Sperrin VERIFY(0 == dmu_buf_hold(os, lr->lr_foid, boff, zgd, &db)); 871c5c6ffa0Smaybee ASSERT(boff == db->db_offset); 872c5c6ffa0Smaybee lr->lr_blkoff = off - boff; 873c5c6ffa0Smaybee error = dmu_sync(zio, db, &lr->lr_blkptr, 87467bd71c6Sperrin lr->lr_common.lrc_txg, zfs_get_done, zgd); 87567bd71c6Sperrin if (error == 0) { 87667bd71c6Sperrin zil_add_vdev(zfsvfs->z_log, 87767bd71c6Sperrin DVA_GET_VDEV(BP_IDENTITY(&lr->lr_blkptr))); 87867bd71c6Sperrin } 879c5c6ffa0Smaybee /* 880c5c6ffa0Smaybee * If we get EINPROGRESS, then we need to wait for a 881c5c6ffa0Smaybee * write IO initiated by dmu_sync() to complete before 882b19a79ecSperrin * we can release this dbuf. We will finish everything 883c5c6ffa0Smaybee * up in the zfs_get_done() callback. 884c5c6ffa0Smaybee */ 885c5c6ffa0Smaybee if (error == EINPROGRESS) 886c5c6ffa0Smaybee return (0); 88767bd71c6Sperrin dmu_buf_rele(db, zgd); 88867bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 889fa9e4066Sahrens } 890104e2ed7Sperrin out: 891c5c6ffa0Smaybee zfs_range_unlock(rl); 892fa9e4066Sahrens VN_RELE(ZTOV(zp)); 893fa9e4066Sahrens return (error); 894fa9e4066Sahrens } 895fa9e4066Sahrens 896fa9e4066Sahrens /*ARGSUSED*/ 897fa9e4066Sahrens static int 898fa9e4066Sahrens zfs_access(vnode_t *vp, int mode, int flags, cred_t *cr) 899fa9e4066Sahrens { 900fa9e4066Sahrens znode_t *zp = VTOZ(vp); 901fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 902fa9e4066Sahrens int error; 903fa9e4066Sahrens 904fa9e4066Sahrens ZFS_ENTER(zfsvfs); 905fa9e4066Sahrens error = zfs_zaccess_rwx(zp, mode, cr); 906fa9e4066Sahrens ZFS_EXIT(zfsvfs); 907fa9e4066Sahrens return (error); 908fa9e4066Sahrens } 909fa9e4066Sahrens 910fa9e4066Sahrens /* 911fa9e4066Sahrens * Lookup an entry in a directory, or an extended attribute directory. 912fa9e4066Sahrens * If it exists, return a held vnode reference for it. 913fa9e4066Sahrens * 914fa9e4066Sahrens * IN: dvp - vnode of directory to search. 915fa9e4066Sahrens * nm - name of entry to lookup. 916fa9e4066Sahrens * pnp - full pathname to lookup [UNUSED]. 917fa9e4066Sahrens * flags - LOOKUP_XATTR set if looking for an attribute. 918fa9e4066Sahrens * rdir - root directory vnode [UNUSED]. 919fa9e4066Sahrens * cr - credentials of caller. 920fa9e4066Sahrens * 921fa9e4066Sahrens * OUT: vpp - vnode of located entry, NULL if not found. 922fa9e4066Sahrens * 923fa9e4066Sahrens * RETURN: 0 if success 924fa9e4066Sahrens * error code if failure 925fa9e4066Sahrens * 926fa9e4066Sahrens * Timestamps: 927fa9e4066Sahrens * NA 928fa9e4066Sahrens */ 929fa9e4066Sahrens /* ARGSUSED */ 930fa9e4066Sahrens static int 931fa9e4066Sahrens zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 932fa9e4066Sahrens int flags, vnode_t *rdir, cred_t *cr) 933fa9e4066Sahrens { 934fa9e4066Sahrens 935fa9e4066Sahrens znode_t *zdp = VTOZ(dvp); 936fa9e4066Sahrens zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 937fa9e4066Sahrens int error; 938fa9e4066Sahrens 939fa9e4066Sahrens ZFS_ENTER(zfsvfs); 940fa9e4066Sahrens 941fa9e4066Sahrens *vpp = NULL; 942fa9e4066Sahrens 943fa9e4066Sahrens if (flags & LOOKUP_XATTR) { 9447b55fa8eSck /* 9457b55fa8eSck * If the xattr property is off, refuse the lookup request. 9467b55fa8eSck */ 9477b55fa8eSck if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 9487b55fa8eSck ZFS_EXIT(zfsvfs); 9497b55fa8eSck return (EINVAL); 9507b55fa8eSck } 9517b55fa8eSck 952fa9e4066Sahrens /* 953fa9e4066Sahrens * We don't allow recursive attributes.. 954fa9e4066Sahrens * Maybe someday we will. 955fa9e4066Sahrens */ 956fa9e4066Sahrens if (zdp->z_phys->zp_flags & ZFS_XATTR) { 957fa9e4066Sahrens ZFS_EXIT(zfsvfs); 958fa9e4066Sahrens return (EINVAL); 959fa9e4066Sahrens } 960fa9e4066Sahrens 9613f063a9dSck if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 962fa9e4066Sahrens ZFS_EXIT(zfsvfs); 963fa9e4066Sahrens return (error); 964fa9e4066Sahrens } 965fa9e4066Sahrens 966fa9e4066Sahrens /* 967fa9e4066Sahrens * Do we have permission to get into attribute directory? 968fa9e4066Sahrens */ 969fa9e4066Sahrens 970fa9e4066Sahrens if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, cr)) { 971fa9e4066Sahrens VN_RELE(*vpp); 972fa9e4066Sahrens } 973fa9e4066Sahrens 974fa9e4066Sahrens ZFS_EXIT(zfsvfs); 975fa9e4066Sahrens return (error); 976fa9e4066Sahrens } 977fa9e4066Sahrens 9780f2dc02eSek if (dvp->v_type != VDIR) { 9790f2dc02eSek ZFS_EXIT(zfsvfs); 980736b9155Smarks return (ENOTDIR); 9810f2dc02eSek } 982736b9155Smarks 983fa9e4066Sahrens /* 984fa9e4066Sahrens * Check accessibility of directory. 985fa9e4066Sahrens */ 986fa9e4066Sahrens 987fa9e4066Sahrens if (error = zfs_zaccess(zdp, ACE_EXECUTE, cr)) { 988fa9e4066Sahrens ZFS_EXIT(zfsvfs); 989fa9e4066Sahrens return (error); 990fa9e4066Sahrens } 991fa9e4066Sahrens 992fa9e4066Sahrens if ((error = zfs_dirlook(zdp, nm, vpp)) == 0) { 993fa9e4066Sahrens 994fa9e4066Sahrens /* 995fa9e4066Sahrens * Convert device special files 996fa9e4066Sahrens */ 997fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 998fa9e4066Sahrens vnode_t *svp; 999fa9e4066Sahrens 1000fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1001fa9e4066Sahrens VN_RELE(*vpp); 1002fa9e4066Sahrens if (svp == NULL) 1003fa9e4066Sahrens error = ENOSYS; 1004fa9e4066Sahrens else 1005fa9e4066Sahrens *vpp = svp; 1006fa9e4066Sahrens } 1007fa9e4066Sahrens } 1008fa9e4066Sahrens 1009fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1010fa9e4066Sahrens return (error); 1011fa9e4066Sahrens } 1012fa9e4066Sahrens 1013fa9e4066Sahrens /* 1014fa9e4066Sahrens * Attempt to create a new entry in a directory. If the entry 1015fa9e4066Sahrens * already exists, truncate the file if permissible, else return 1016fa9e4066Sahrens * an error. Return the vp of the created or trunc'd file. 1017fa9e4066Sahrens * 1018fa9e4066Sahrens * IN: dvp - vnode of directory to put new file entry in. 1019fa9e4066Sahrens * name - name of new file entry. 1020fa9e4066Sahrens * vap - attributes of new file. 1021fa9e4066Sahrens * excl - flag indicating exclusive or non-exclusive mode. 1022fa9e4066Sahrens * mode - mode to open file with. 1023fa9e4066Sahrens * cr - credentials of caller. 1024fa9e4066Sahrens * flag - large file flag [UNUSED]. 1025fa9e4066Sahrens * 1026fa9e4066Sahrens * OUT: vpp - vnode of created or trunc'd entry. 1027fa9e4066Sahrens * 1028fa9e4066Sahrens * RETURN: 0 if success 1029fa9e4066Sahrens * error code if failure 1030fa9e4066Sahrens * 1031fa9e4066Sahrens * Timestamps: 1032fa9e4066Sahrens * dvp - ctime|mtime updated if new entry created 1033fa9e4066Sahrens * vp - ctime|mtime always, atime if new 1034fa9e4066Sahrens */ 1035fa9e4066Sahrens /* ARGSUSED */ 1036fa9e4066Sahrens static int 1037fa9e4066Sahrens zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, 1038fa9e4066Sahrens int mode, vnode_t **vpp, cred_t *cr, int flag) 1039fa9e4066Sahrens { 1040fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1041fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1042fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1043fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 1044fa9e4066Sahrens zfs_dirlock_t *dl; 1045fa9e4066Sahrens dmu_tx_t *tx; 1046fa9e4066Sahrens int error; 1047fa9e4066Sahrens uint64_t zoid; 1048fa9e4066Sahrens 1049fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1050fa9e4066Sahrens 1051fa9e4066Sahrens top: 1052fa9e4066Sahrens *vpp = NULL; 1053fa9e4066Sahrens 1054fa9e4066Sahrens if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) 1055fa9e4066Sahrens vap->va_mode &= ~VSVTX; 1056fa9e4066Sahrens 1057fa9e4066Sahrens if (*name == '\0') { 1058fa9e4066Sahrens /* 1059fa9e4066Sahrens * Null component name refers to the directory itself. 1060fa9e4066Sahrens */ 1061fa9e4066Sahrens VN_HOLD(dvp); 1062fa9e4066Sahrens zp = dzp; 1063fa9e4066Sahrens dl = NULL; 1064fa9e4066Sahrens error = 0; 1065fa9e4066Sahrens } else { 1066fa9e4066Sahrens /* possible VN_HOLD(zp) */ 1067fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, 0)) { 1068fa9e4066Sahrens if (strcmp(name, "..") == 0) 1069fa9e4066Sahrens error = EISDIR; 1070fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1071fa9e4066Sahrens return (error); 1072fa9e4066Sahrens } 1073fa9e4066Sahrens } 1074fa9e4066Sahrens 1075fa9e4066Sahrens zoid = zp ? zp->z_id : -1ULL; 1076fa9e4066Sahrens 1077fa9e4066Sahrens if (zp == NULL) { 1078fa9e4066Sahrens /* 1079fa9e4066Sahrens * Create a new file object and update the directory 1080fa9e4066Sahrens * to reference it. 1081fa9e4066Sahrens */ 1082fa9e4066Sahrens if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { 1083fa9e4066Sahrens goto out; 1084fa9e4066Sahrens } 1085fa9e4066Sahrens 1086fa9e4066Sahrens /* 1087fa9e4066Sahrens * We only support the creation of regular files in 1088fa9e4066Sahrens * extended attribute directories. 1089fa9e4066Sahrens */ 1090fa9e4066Sahrens if ((dzp->z_phys->zp_flags & ZFS_XATTR) && 1091fa9e4066Sahrens (vap->va_type != VREG)) { 1092fa9e4066Sahrens error = EINVAL; 1093fa9e4066Sahrens goto out; 1094fa9e4066Sahrens } 1095fa9e4066Sahrens 1096fa9e4066Sahrens tx = dmu_tx_create(os); 1097fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 1098fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 1099ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 1100fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 1101fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1102fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1103fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1104fa9e4066Sahrens if (error) { 1105fa9e4066Sahrens zfs_dirent_unlock(dl); 1106fa9e4066Sahrens if (error == ERESTART && 1107fa9e4066Sahrens zfsvfs->z_assign == TXG_NOWAIT) { 11088a2f1b91Sahrens dmu_tx_wait(tx); 11098a2f1b91Sahrens dmu_tx_abort(tx); 1110fa9e4066Sahrens goto top; 1111fa9e4066Sahrens } 11128a2f1b91Sahrens dmu_tx_abort(tx); 1113fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1114fa9e4066Sahrens return (error); 1115fa9e4066Sahrens } 1116fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); 1117fa9e4066Sahrens ASSERT(zp->z_id == zoid); 1118fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1119b19a79ecSperrin zfs_log_create(zilog, tx, TX_CREATE, dzp, zp, name); 1120fa9e4066Sahrens dmu_tx_commit(tx); 1121fa9e4066Sahrens } else { 1122fa9e4066Sahrens /* 1123fa9e4066Sahrens * A directory entry already exists for this name. 1124fa9e4066Sahrens */ 1125fa9e4066Sahrens /* 1126fa9e4066Sahrens * Can't truncate an existing file if in exclusive mode. 1127fa9e4066Sahrens */ 1128fa9e4066Sahrens if (excl == EXCL) { 1129fa9e4066Sahrens error = EEXIST; 1130fa9e4066Sahrens goto out; 1131fa9e4066Sahrens } 1132fa9e4066Sahrens /* 1133fa9e4066Sahrens * Can't open a directory for writing. 1134fa9e4066Sahrens */ 1135fa9e4066Sahrens if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1136fa9e4066Sahrens error = EISDIR; 1137fa9e4066Sahrens goto out; 1138fa9e4066Sahrens } 1139fa9e4066Sahrens /* 1140fa9e4066Sahrens * Verify requested access to file. 1141fa9e4066Sahrens */ 1142fa9e4066Sahrens if (mode && (error = zfs_zaccess_rwx(zp, mode, cr))) { 1143fa9e4066Sahrens goto out; 1144fa9e4066Sahrens } 1145fa9e4066Sahrens 1146fa9e4066Sahrens mutex_enter(&dzp->z_lock); 1147fa9e4066Sahrens dzp->z_seq++; 1148fa9e4066Sahrens mutex_exit(&dzp->z_lock); 1149fa9e4066Sahrens 11505730cc9aSmaybee /* 11515730cc9aSmaybee * Truncate regular files if requested. 11525730cc9aSmaybee */ 11535730cc9aSmaybee if ((ZTOV(zp)->v_type == VREG) && 11545730cc9aSmaybee (zp->z_phys->zp_size != 0) && 1155fa9e4066Sahrens (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 11565730cc9aSmaybee error = zfs_freesp(zp, 0, 0, mode, TRUE); 11575730cc9aSmaybee if (error == ERESTART && 11585730cc9aSmaybee zfsvfs->z_assign == TXG_NOWAIT) { 11598a2f1b91Sahrens /* NB: we already did dmu_tx_wait() */ 11605730cc9aSmaybee zfs_dirent_unlock(dl); 11618991ab5bSperrin VN_RELE(ZTOV(zp)); 11625730cc9aSmaybee goto top; 1163fa9e4066Sahrens } 1164fa9e4066Sahrens } 1165fa9e4066Sahrens } 1166fa9e4066Sahrens out: 1167fa9e4066Sahrens 1168fa9e4066Sahrens if (dl) 1169fa9e4066Sahrens zfs_dirent_unlock(dl); 1170fa9e4066Sahrens 1171fa9e4066Sahrens if (error) { 1172fa9e4066Sahrens if (zp) 1173fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1174fa9e4066Sahrens } else { 1175fa9e4066Sahrens *vpp = ZTOV(zp); 1176fa9e4066Sahrens /* 1177fa9e4066Sahrens * If vnode is for a device return a specfs vnode instead. 1178fa9e4066Sahrens */ 1179fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1180fa9e4066Sahrens struct vnode *svp; 1181fa9e4066Sahrens 1182fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1183fa9e4066Sahrens VN_RELE(*vpp); 1184fa9e4066Sahrens if (svp == NULL) { 1185fa9e4066Sahrens error = ENOSYS; 1186fa9e4066Sahrens } 1187fa9e4066Sahrens *vpp = svp; 1188fa9e4066Sahrens } 1189fa9e4066Sahrens } 1190fa9e4066Sahrens 1191fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1192fa9e4066Sahrens return (error); 1193fa9e4066Sahrens } 1194fa9e4066Sahrens 1195fa9e4066Sahrens /* 1196fa9e4066Sahrens * Remove an entry from a directory. 1197fa9e4066Sahrens * 1198fa9e4066Sahrens * IN: dvp - vnode of directory to remove entry from. 1199fa9e4066Sahrens * name - name of entry to remove. 1200fa9e4066Sahrens * cr - credentials of caller. 1201fa9e4066Sahrens * 1202fa9e4066Sahrens * RETURN: 0 if success 1203fa9e4066Sahrens * error code if failure 1204fa9e4066Sahrens * 1205fa9e4066Sahrens * Timestamps: 1206fa9e4066Sahrens * dvp - ctime|mtime 1207fa9e4066Sahrens * vp - ctime (if nlink > 0) 1208fa9e4066Sahrens */ 1209fa9e4066Sahrens static int 1210fa9e4066Sahrens zfs_remove(vnode_t *dvp, char *name, cred_t *cr) 1211fa9e4066Sahrens { 1212fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1213fa9e4066Sahrens znode_t *xzp = NULL; 1214fa9e4066Sahrens vnode_t *vp; 1215fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1216fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1217fa9e4066Sahrens uint64_t acl_obj, xattr_obj; 1218fa9e4066Sahrens zfs_dirlock_t *dl; 1219fa9e4066Sahrens dmu_tx_t *tx; 1220893a6d32Sahrens boolean_t may_delete_now, delete_now = FALSE; 1221893a6d32Sahrens boolean_t unlinked; 1222fa9e4066Sahrens int error; 1223fa9e4066Sahrens 1224fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1225fa9e4066Sahrens 1226fa9e4066Sahrens top: 1227fa9e4066Sahrens /* 1228fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1229fa9e4066Sahrens */ 1230fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZEXISTS)) { 1231fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1232fa9e4066Sahrens return (error); 1233fa9e4066Sahrens } 1234fa9e4066Sahrens 1235fa9e4066Sahrens vp = ZTOV(zp); 1236fa9e4066Sahrens 1237fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1238fa9e4066Sahrens goto out; 1239fa9e4066Sahrens } 1240fa9e4066Sahrens 1241fa9e4066Sahrens /* 1242fa9e4066Sahrens * Need to use rmdir for removing directories. 1243fa9e4066Sahrens */ 1244fa9e4066Sahrens if (vp->v_type == VDIR) { 1245fa9e4066Sahrens error = EPERM; 1246fa9e4066Sahrens goto out; 1247fa9e4066Sahrens } 1248fa9e4066Sahrens 1249fa9e4066Sahrens vnevent_remove(vp); 1250fa9e4066Sahrens 1251033f9833Sek dnlc_remove(dvp, name); 1252033f9833Sek 1253fa9e4066Sahrens mutex_enter(&vp->v_lock); 1254fa9e4066Sahrens may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1255fa9e4066Sahrens mutex_exit(&vp->v_lock); 1256fa9e4066Sahrens 1257fa9e4066Sahrens /* 1258893a6d32Sahrens * We may delete the znode now, or we may put it in the unlinked set; 1259fa9e4066Sahrens * it depends on whether we're the last link, and on whether there are 1260fa9e4066Sahrens * other holds on the vnode. So we dmu_tx_hold() the right things to 1261fa9e4066Sahrens * allow for either case. 1262fa9e4066Sahrens */ 1263fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1264ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1265fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1266fa9e4066Sahrens if (may_delete_now) 1267fa9e4066Sahrens dmu_tx_hold_free(tx, zp->z_id, 0, DMU_OBJECT_END); 1268fa9e4066Sahrens 1269fa9e4066Sahrens /* are there any extended attributes? */ 1270fa9e4066Sahrens if ((xattr_obj = zp->z_phys->zp_xattr) != 0) { 1271fa9e4066Sahrens /* XXX - do we need this if we are deleting? */ 1272fa9e4066Sahrens dmu_tx_hold_bonus(tx, xattr_obj); 1273fa9e4066Sahrens } 1274fa9e4066Sahrens 1275fa9e4066Sahrens /* are there any additional acls */ 1276fa9e4066Sahrens if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 && 1277fa9e4066Sahrens may_delete_now) 1278fa9e4066Sahrens dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1279fa9e4066Sahrens 1280fa9e4066Sahrens /* charge as an update -- would be nice not to charge at all */ 1281893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1282fa9e4066Sahrens 1283fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1284fa9e4066Sahrens if (error) { 1285fa9e4066Sahrens zfs_dirent_unlock(dl); 1286fa9e4066Sahrens VN_RELE(vp); 1287fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 12888a2f1b91Sahrens dmu_tx_wait(tx); 12898a2f1b91Sahrens dmu_tx_abort(tx); 1290fa9e4066Sahrens goto top; 1291fa9e4066Sahrens } 12928a2f1b91Sahrens dmu_tx_abort(tx); 1293fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1294fa9e4066Sahrens return (error); 1295fa9e4066Sahrens } 1296fa9e4066Sahrens 1297fa9e4066Sahrens /* 1298fa9e4066Sahrens * Remove the directory entry. 1299fa9e4066Sahrens */ 1300893a6d32Sahrens error = zfs_link_destroy(dl, zp, tx, 0, &unlinked); 1301fa9e4066Sahrens 1302fa9e4066Sahrens if (error) { 1303fa9e4066Sahrens dmu_tx_commit(tx); 1304fa9e4066Sahrens goto out; 1305fa9e4066Sahrens } 1306fa9e4066Sahrens 1307893a6d32Sahrens if (unlinked) { 1308fa9e4066Sahrens mutex_enter(&vp->v_lock); 1309fa9e4066Sahrens delete_now = may_delete_now && 1310fa9e4066Sahrens vp->v_count == 1 && !vn_has_cached_data(vp) && 1311fa9e4066Sahrens zp->z_phys->zp_xattr == xattr_obj && 1312fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj; 1313fa9e4066Sahrens mutex_exit(&vp->v_lock); 1314fa9e4066Sahrens } 1315fa9e4066Sahrens 1316fa9e4066Sahrens if (delete_now) { 1317fa9e4066Sahrens if (zp->z_phys->zp_xattr) { 1318fa9e4066Sahrens error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp); 1319fa9e4066Sahrens ASSERT3U(error, ==, 0); 1320fa9e4066Sahrens ASSERT3U(xzp->z_phys->zp_links, ==, 2); 1321fa9e4066Sahrens dmu_buf_will_dirty(xzp->z_dbuf, tx); 1322fa9e4066Sahrens mutex_enter(&xzp->z_lock); 1323893a6d32Sahrens xzp->z_unlinked = 1; 1324fa9e4066Sahrens xzp->z_phys->zp_links = 0; 1325fa9e4066Sahrens mutex_exit(&xzp->z_lock); 1326893a6d32Sahrens zfs_unlinked_add(xzp, tx); 1327fa9e4066Sahrens zp->z_phys->zp_xattr = 0; /* probably unnecessary */ 1328fa9e4066Sahrens } 1329fa9e4066Sahrens mutex_enter(&zp->z_lock); 1330fa9e4066Sahrens mutex_enter(&vp->v_lock); 1331fa9e4066Sahrens vp->v_count--; 1332fa9e4066Sahrens ASSERT3U(vp->v_count, ==, 0); 1333fa9e4066Sahrens mutex_exit(&vp->v_lock); 1334fa9e4066Sahrens mutex_exit(&zp->z_lock); 1335fa9e4066Sahrens zfs_znode_delete(zp, tx); 1336fa9e4066Sahrens VFS_RELE(zfsvfs->z_vfs); 1337893a6d32Sahrens } else if (unlinked) { 1338893a6d32Sahrens zfs_unlinked_add(zp, tx); 1339fa9e4066Sahrens } 1340fa9e4066Sahrens 1341b19a79ecSperrin zfs_log_remove(zilog, tx, TX_REMOVE, dzp, name); 1342fa9e4066Sahrens 1343fa9e4066Sahrens dmu_tx_commit(tx); 1344fa9e4066Sahrens out: 1345fa9e4066Sahrens zfs_dirent_unlock(dl); 1346fa9e4066Sahrens 1347fa9e4066Sahrens if (!delete_now) { 1348fa9e4066Sahrens VN_RELE(vp); 1349fa9e4066Sahrens } else if (xzp) { 1350fa9e4066Sahrens /* this rele delayed to prevent nesting transactions */ 1351fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 1352fa9e4066Sahrens } 1353fa9e4066Sahrens 1354fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1355fa9e4066Sahrens return (error); 1356fa9e4066Sahrens } 1357fa9e4066Sahrens 1358fa9e4066Sahrens /* 1359fa9e4066Sahrens * Create a new directory and insert it into dvp using the name 1360fa9e4066Sahrens * provided. Return a pointer to the inserted directory. 1361fa9e4066Sahrens * 1362fa9e4066Sahrens * IN: dvp - vnode of directory to add subdir to. 1363fa9e4066Sahrens * dirname - name of new directory. 1364fa9e4066Sahrens * vap - attributes of new directory. 1365fa9e4066Sahrens * cr - credentials of caller. 1366fa9e4066Sahrens * 1367fa9e4066Sahrens * OUT: vpp - vnode of created directory. 1368fa9e4066Sahrens * 1369fa9e4066Sahrens * RETURN: 0 if success 1370fa9e4066Sahrens * error code if failure 1371fa9e4066Sahrens * 1372fa9e4066Sahrens * Timestamps: 1373fa9e4066Sahrens * dvp - ctime|mtime updated 1374fa9e4066Sahrens * vp - ctime|mtime|atime updated 1375fa9e4066Sahrens */ 1376fa9e4066Sahrens static int 1377fa9e4066Sahrens zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr) 1378fa9e4066Sahrens { 1379fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1380fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1381fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1382fa9e4066Sahrens zfs_dirlock_t *dl; 1383fa9e4066Sahrens uint64_t zoid = 0; 1384fa9e4066Sahrens dmu_tx_t *tx; 1385fa9e4066Sahrens int error; 1386fa9e4066Sahrens 1387fa9e4066Sahrens ASSERT(vap->va_type == VDIR); 1388fa9e4066Sahrens 1389fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1390fa9e4066Sahrens 1391fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) { 1392fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1393fa9e4066Sahrens return (EINVAL); 1394fa9e4066Sahrens } 1395fa9e4066Sahrens top: 1396fa9e4066Sahrens *vpp = NULL; 1397fa9e4066Sahrens 1398fa9e4066Sahrens /* 1399fa9e4066Sahrens * First make sure the new directory doesn't exist. 1400fa9e4066Sahrens */ 1401fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, ZNEW)) { 1402fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1403fa9e4066Sahrens return (error); 1404fa9e4066Sahrens } 1405fa9e4066Sahrens 1406d2443e76Smarks if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, cr)) { 1407d2443e76Smarks zfs_dirent_unlock(dl); 1408d2443e76Smarks ZFS_EXIT(zfsvfs); 1409d2443e76Smarks return (error); 1410d2443e76Smarks } 1411d2443e76Smarks 1412fa9e4066Sahrens /* 1413fa9e4066Sahrens * Add a new entry to the directory. 1414fa9e4066Sahrens */ 1415fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1416ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 1417ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 1418fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 1419fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1420fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1421fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1422fa9e4066Sahrens if (error) { 1423fa9e4066Sahrens zfs_dirent_unlock(dl); 1424fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 14258a2f1b91Sahrens dmu_tx_wait(tx); 14268a2f1b91Sahrens dmu_tx_abort(tx); 1427fa9e4066Sahrens goto top; 1428fa9e4066Sahrens } 14298a2f1b91Sahrens dmu_tx_abort(tx); 1430fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1431fa9e4066Sahrens return (error); 1432fa9e4066Sahrens } 1433fa9e4066Sahrens 1434fa9e4066Sahrens /* 1435fa9e4066Sahrens * Create new node. 1436fa9e4066Sahrens */ 1437fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); 1438fa9e4066Sahrens 1439fa9e4066Sahrens /* 1440fa9e4066Sahrens * Now put new name in parent dir. 1441fa9e4066Sahrens */ 1442fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1443fa9e4066Sahrens 1444fa9e4066Sahrens *vpp = ZTOV(zp); 1445fa9e4066Sahrens 1446b19a79ecSperrin zfs_log_create(zilog, tx, TX_MKDIR, dzp, zp, dirname); 1447fa9e4066Sahrens dmu_tx_commit(tx); 1448fa9e4066Sahrens 1449fa9e4066Sahrens zfs_dirent_unlock(dl); 1450fa9e4066Sahrens 1451fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1452fa9e4066Sahrens return (0); 1453fa9e4066Sahrens } 1454fa9e4066Sahrens 1455fa9e4066Sahrens /* 1456fa9e4066Sahrens * Remove a directory subdir entry. If the current working 1457fa9e4066Sahrens * directory is the same as the subdir to be removed, the 1458fa9e4066Sahrens * remove will fail. 1459fa9e4066Sahrens * 1460fa9e4066Sahrens * IN: dvp - vnode of directory to remove from. 1461fa9e4066Sahrens * name - name of directory to be removed. 1462fa9e4066Sahrens * cwd - vnode of current working directory. 1463fa9e4066Sahrens * cr - credentials of caller. 1464fa9e4066Sahrens * 1465fa9e4066Sahrens * RETURN: 0 if success 1466fa9e4066Sahrens * error code if failure 1467fa9e4066Sahrens * 1468fa9e4066Sahrens * Timestamps: 1469fa9e4066Sahrens * dvp - ctime|mtime updated 1470fa9e4066Sahrens */ 1471fa9e4066Sahrens static int 1472fa9e4066Sahrens zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr) 1473fa9e4066Sahrens { 1474fa9e4066Sahrens znode_t *dzp = VTOZ(dvp); 1475fa9e4066Sahrens znode_t *zp; 1476fa9e4066Sahrens vnode_t *vp; 1477fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1478fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1479fa9e4066Sahrens zfs_dirlock_t *dl; 1480fa9e4066Sahrens dmu_tx_t *tx; 1481fa9e4066Sahrens int error; 1482fa9e4066Sahrens 1483fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1484fa9e4066Sahrens 1485fa9e4066Sahrens top: 1486fa9e4066Sahrens zp = NULL; 1487fa9e4066Sahrens 1488fa9e4066Sahrens /* 1489fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1490fa9e4066Sahrens */ 1491fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZEXISTS)) { 1492fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1493fa9e4066Sahrens return (error); 1494fa9e4066Sahrens } 1495fa9e4066Sahrens 1496fa9e4066Sahrens vp = ZTOV(zp); 1497fa9e4066Sahrens 1498fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1499fa9e4066Sahrens goto out; 1500fa9e4066Sahrens } 1501fa9e4066Sahrens 1502fa9e4066Sahrens if (vp->v_type != VDIR) { 1503fa9e4066Sahrens error = ENOTDIR; 1504fa9e4066Sahrens goto out; 1505fa9e4066Sahrens } 1506fa9e4066Sahrens 1507fa9e4066Sahrens if (vp == cwd) { 1508fa9e4066Sahrens error = EINVAL; 1509fa9e4066Sahrens goto out; 1510fa9e4066Sahrens } 1511fa9e4066Sahrens 1512fa9e4066Sahrens vnevent_rmdir(vp); 1513fa9e4066Sahrens 1514fa9e4066Sahrens /* 1515fa9e4066Sahrens * Grab a lock on the parent pointer make sure we play well 1516fa9e4066Sahrens * with the treewalk and directory rename code. 1517fa9e4066Sahrens */ 1518fa9e4066Sahrens rw_enter(&zp->z_parent_lock, RW_WRITER); 1519fa9e4066Sahrens 1520fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1521ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1522fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1523893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1524fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1525fa9e4066Sahrens if (error) { 1526fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1527fa9e4066Sahrens zfs_dirent_unlock(dl); 1528fa9e4066Sahrens VN_RELE(vp); 1529fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 15308a2f1b91Sahrens dmu_tx_wait(tx); 15318a2f1b91Sahrens dmu_tx_abort(tx); 1532fa9e4066Sahrens goto top; 1533fa9e4066Sahrens } 15348a2f1b91Sahrens dmu_tx_abort(tx); 1535fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1536fa9e4066Sahrens return (error); 1537fa9e4066Sahrens } 1538fa9e4066Sahrens 1539fa9e4066Sahrens error = zfs_link_destroy(dl, zp, tx, 0, NULL); 1540fa9e4066Sahrens 1541fa9e4066Sahrens if (error == 0) 1542b19a79ecSperrin zfs_log_remove(zilog, tx, TX_RMDIR, dzp, name); 1543fa9e4066Sahrens 1544fa9e4066Sahrens dmu_tx_commit(tx); 1545fa9e4066Sahrens 1546fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1547fa9e4066Sahrens out: 1548fa9e4066Sahrens zfs_dirent_unlock(dl); 1549fa9e4066Sahrens 1550fa9e4066Sahrens VN_RELE(vp); 1551fa9e4066Sahrens 1552fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1553fa9e4066Sahrens return (error); 1554fa9e4066Sahrens } 1555fa9e4066Sahrens 1556fa9e4066Sahrens /* 1557fa9e4066Sahrens * Read as many directory entries as will fit into the provided 1558fa9e4066Sahrens * buffer from the given directory cursor position (specified in 1559fa9e4066Sahrens * the uio structure. 1560fa9e4066Sahrens * 1561fa9e4066Sahrens * IN: vp - vnode of directory to read. 1562fa9e4066Sahrens * uio - structure supplying read location, range info, 1563fa9e4066Sahrens * and return buffer. 1564fa9e4066Sahrens * cr - credentials of caller. 1565fa9e4066Sahrens * 1566fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 1567fa9e4066Sahrens * eofp - set to true if end-of-file detected. 1568fa9e4066Sahrens * 1569fa9e4066Sahrens * RETURN: 0 if success 1570fa9e4066Sahrens * error code if failure 1571fa9e4066Sahrens * 1572fa9e4066Sahrens * Timestamps: 1573fa9e4066Sahrens * vp - atime updated 1574fa9e4066Sahrens * 1575fa9e4066Sahrens * Note that the low 4 bits of the cookie returned by zap is always zero. 1576fa9e4066Sahrens * This allows us to use the low range for "special" directory entries: 1577fa9e4066Sahrens * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 1578fa9e4066Sahrens * we use the offset 2 for the '.zfs' directory. 1579fa9e4066Sahrens */ 1580fa9e4066Sahrens /* ARGSUSED */ 1581fa9e4066Sahrens static int 1582fa9e4066Sahrens zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp) 1583fa9e4066Sahrens { 1584fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1585fa9e4066Sahrens iovec_t *iovp; 1586fa9e4066Sahrens dirent64_t *odp; 1587fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 15887f6e3e7dSperrin objset_t *os; 1589fa9e4066Sahrens caddr_t outbuf; 1590fa9e4066Sahrens size_t bufsize; 1591fa9e4066Sahrens zap_cursor_t zc; 1592fa9e4066Sahrens zap_attribute_t zap; 1593fa9e4066Sahrens uint_t bytes_wanted; 1594fa9e4066Sahrens ushort_t this_reclen; 1595fa9e4066Sahrens uint64_t offset; /* must be unsigned; checks for < 1 */ 1596fa9e4066Sahrens off64_t *next; 1597fa9e4066Sahrens int local_eof; 15987f6e3e7dSperrin int outcount; 15997f6e3e7dSperrin int error; 16007f6e3e7dSperrin uint8_t prefetch; 1601fa9e4066Sahrens 1602fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1603fa9e4066Sahrens 1604fa9e4066Sahrens /* 1605fa9e4066Sahrens * If we are not given an eof variable, 1606fa9e4066Sahrens * use a local one. 1607fa9e4066Sahrens */ 1608fa9e4066Sahrens if (eofp == NULL) 1609fa9e4066Sahrens eofp = &local_eof; 1610fa9e4066Sahrens 1611fa9e4066Sahrens /* 1612fa9e4066Sahrens * Check for valid iov_len. 1613fa9e4066Sahrens */ 1614fa9e4066Sahrens if (uio->uio_iov->iov_len <= 0) { 1615fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1616fa9e4066Sahrens return (EINVAL); 1617fa9e4066Sahrens } 1618fa9e4066Sahrens 1619fa9e4066Sahrens /* 1620fa9e4066Sahrens * Quit if directory has been removed (posix) 1621fa9e4066Sahrens */ 1622893a6d32Sahrens if ((*eofp = zp->z_unlinked) != 0) { 1623fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1624fa9e4066Sahrens return (0); 1625fa9e4066Sahrens } 1626fa9e4066Sahrens 16277f6e3e7dSperrin error = 0; 16287f6e3e7dSperrin os = zfsvfs->z_os; 16297f6e3e7dSperrin offset = uio->uio_loffset; 16307f6e3e7dSperrin prefetch = zp->z_zn_prefetch; 16317f6e3e7dSperrin 1632fa9e4066Sahrens /* 1633fa9e4066Sahrens * Initialize the iterator cursor. 1634fa9e4066Sahrens */ 1635fa9e4066Sahrens if (offset <= 3) { 1636fa9e4066Sahrens /* 1637fa9e4066Sahrens * Start iteration from the beginning of the directory. 1638fa9e4066Sahrens */ 16397f6e3e7dSperrin zap_cursor_init(&zc, os, zp->z_id); 1640fa9e4066Sahrens } else { 1641fa9e4066Sahrens /* 1642fa9e4066Sahrens * The offset is a serialized cursor. 1643fa9e4066Sahrens */ 16447f6e3e7dSperrin zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 1645fa9e4066Sahrens } 1646fa9e4066Sahrens 1647fa9e4066Sahrens /* 1648fa9e4066Sahrens * Get space to change directory entries into fs independent format. 1649fa9e4066Sahrens */ 1650fa9e4066Sahrens iovp = uio->uio_iov; 1651fa9e4066Sahrens bytes_wanted = iovp->iov_len; 1652fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 1653fa9e4066Sahrens bufsize = bytes_wanted; 1654fa9e4066Sahrens outbuf = kmem_alloc(bufsize, KM_SLEEP); 1655fa9e4066Sahrens odp = (struct dirent64 *)outbuf; 1656fa9e4066Sahrens } else { 1657fa9e4066Sahrens bufsize = bytes_wanted; 1658fa9e4066Sahrens odp = (struct dirent64 *)iovp->iov_base; 1659fa9e4066Sahrens } 1660fa9e4066Sahrens 1661fa9e4066Sahrens /* 1662fa9e4066Sahrens * Transform to file-system independent format 1663fa9e4066Sahrens */ 1664fa9e4066Sahrens outcount = 0; 1665fa9e4066Sahrens while (outcount < bytes_wanted) { 1666fa9e4066Sahrens /* 1667fa9e4066Sahrens * Special case `.', `..', and `.zfs'. 1668fa9e4066Sahrens */ 1669fa9e4066Sahrens if (offset == 0) { 1670fa9e4066Sahrens (void) strcpy(zap.za_name, "."); 1671fa9e4066Sahrens zap.za_first_integer = zp->z_id; 1672fa9e4066Sahrens this_reclen = DIRENT64_RECLEN(1); 1673fa9e4066Sahrens } else if (offset == 1) { 1674fa9e4066Sahrens (void) strcpy(zap.za_name, ".."); 1675fa9e4066Sahrens zap.za_first_integer = zp->z_phys->zp_parent; 1676fa9e4066Sahrens this_reclen = DIRENT64_RECLEN(2); 1677fa9e4066Sahrens } else if (offset == 2 && zfs_show_ctldir(zp)) { 1678fa9e4066Sahrens (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 1679fa9e4066Sahrens zap.za_first_integer = ZFSCTL_INO_ROOT; 1680fa9e4066Sahrens this_reclen = 1681fa9e4066Sahrens DIRENT64_RECLEN(sizeof (ZFS_CTLDIR_NAME) - 1); 1682fa9e4066Sahrens } else { 1683fa9e4066Sahrens /* 1684fa9e4066Sahrens * Grab next entry. 1685fa9e4066Sahrens */ 1686fa9e4066Sahrens if (error = zap_cursor_retrieve(&zc, &zap)) { 1687fa9e4066Sahrens if ((*eofp = (error == ENOENT)) != 0) 1688fa9e4066Sahrens break; 1689fa9e4066Sahrens else 1690fa9e4066Sahrens goto update; 1691fa9e4066Sahrens } 1692fa9e4066Sahrens 1693fa9e4066Sahrens if (zap.za_integer_length != 8 || 1694fa9e4066Sahrens zap.za_num_integers != 1) { 1695fa9e4066Sahrens cmn_err(CE_WARN, "zap_readdir: bad directory " 1696fa9e4066Sahrens "entry, obj = %lld, offset = %lld\n", 1697fa9e4066Sahrens (u_longlong_t)zp->z_id, 1698fa9e4066Sahrens (u_longlong_t)offset); 1699fa9e4066Sahrens error = ENXIO; 1700fa9e4066Sahrens goto update; 1701fa9e4066Sahrens } 1702fa9e4066Sahrens this_reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 1703fa9e4066Sahrens } 1704fa9e4066Sahrens 1705fa9e4066Sahrens /* 1706fa9e4066Sahrens * Will this entry fit in the buffer? 1707fa9e4066Sahrens */ 1708fa9e4066Sahrens if (outcount + this_reclen > bufsize) { 1709fa9e4066Sahrens /* 1710fa9e4066Sahrens * Did we manage to fit anything in the buffer? 1711fa9e4066Sahrens */ 1712fa9e4066Sahrens if (!outcount) { 1713fa9e4066Sahrens error = EINVAL; 1714fa9e4066Sahrens goto update; 1715fa9e4066Sahrens } 1716fa9e4066Sahrens break; 1717fa9e4066Sahrens } 1718fa9e4066Sahrens /* 1719fa9e4066Sahrens * Add this entry: 1720fa9e4066Sahrens */ 1721fa9e4066Sahrens odp->d_ino = (ino64_t)zap.za_first_integer; 1722fa9e4066Sahrens odp->d_reclen = (ushort_t)this_reclen; 1723fa9e4066Sahrens /* NOTE: d_off is the offset for the *next* entry */ 1724fa9e4066Sahrens next = &(odp->d_off); 1725fa9e4066Sahrens (void) strncpy(odp->d_name, zap.za_name, 1726fa9e4066Sahrens DIRENT64_NAMELEN(this_reclen)); 1727fa9e4066Sahrens outcount += this_reclen; 1728fa9e4066Sahrens odp = (dirent64_t *)((intptr_t)odp + this_reclen); 1729fa9e4066Sahrens 1730fa9e4066Sahrens ASSERT(outcount <= bufsize); 1731fa9e4066Sahrens 1732fa9e4066Sahrens /* Prefetch znode */ 17337f6e3e7dSperrin if (prefetch) 17347f6e3e7dSperrin dmu_prefetch(os, zap.za_first_integer, 0, 0); 1735fa9e4066Sahrens 1736fa9e4066Sahrens /* 1737fa9e4066Sahrens * Move to the next entry, fill in the previous offset. 1738fa9e4066Sahrens */ 1739fa9e4066Sahrens if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 1740fa9e4066Sahrens zap_cursor_advance(&zc); 1741fa9e4066Sahrens offset = zap_cursor_serialize(&zc); 1742fa9e4066Sahrens } else { 1743fa9e4066Sahrens offset += 1; 1744fa9e4066Sahrens } 1745fa9e4066Sahrens *next = offset; 1746fa9e4066Sahrens } 17477f6e3e7dSperrin zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 1748fa9e4066Sahrens 1749fa9e4066Sahrens if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 1750fa9e4066Sahrens iovp->iov_base += outcount; 1751fa9e4066Sahrens iovp->iov_len -= outcount; 1752fa9e4066Sahrens uio->uio_resid -= outcount; 1753fa9e4066Sahrens } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 1754fa9e4066Sahrens /* 1755fa9e4066Sahrens * Reset the pointer. 1756fa9e4066Sahrens */ 1757fa9e4066Sahrens offset = uio->uio_loffset; 1758fa9e4066Sahrens } 1759fa9e4066Sahrens 1760fa9e4066Sahrens update: 176187e5029aSahrens zap_cursor_fini(&zc); 1762fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1763fa9e4066Sahrens kmem_free(outbuf, bufsize); 1764fa9e4066Sahrens 1765fa9e4066Sahrens if (error == ENOENT) 1766fa9e4066Sahrens error = 0; 1767fa9e4066Sahrens 1768fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 1769fa9e4066Sahrens 1770fa9e4066Sahrens uio->uio_loffset = offset; 1771fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1772fa9e4066Sahrens return (error); 1773fa9e4066Sahrens } 1774fa9e4066Sahrens 1775fa9e4066Sahrens static int 1776fa9e4066Sahrens zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr) 1777fa9e4066Sahrens { 1778fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1779fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1780fa9e4066Sahrens 1781b468a217Seschrock /* 1782b468a217Seschrock * Regardless of whether this is required for standards conformance, 1783b468a217Seschrock * this is the logical behavior when fsync() is called on a file with 1784b468a217Seschrock * dirty pages. We use B_ASYNC since the ZIL transactions are already 1785b468a217Seschrock * going to be pushed out as part of the zil_commit(). 1786b468a217Seschrock */ 1787b468a217Seschrock if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && 1788b468a217Seschrock (vp->v_type == VREG) && !(IS_SWAPVP(vp))) 1789b468a217Seschrock (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr); 1790b468a217Seschrock 1791fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1792b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 1793fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1794fa9e4066Sahrens return (0); 1795fa9e4066Sahrens } 1796fa9e4066Sahrens 1797fa9e4066Sahrens /* 1798fa9e4066Sahrens * Get the requested file attributes and place them in the provided 1799fa9e4066Sahrens * vattr structure. 1800fa9e4066Sahrens * 1801fa9e4066Sahrens * IN: vp - vnode of file. 1802fa9e4066Sahrens * vap - va_mask identifies requested attributes. 1803fa9e4066Sahrens * flags - [UNUSED] 1804fa9e4066Sahrens * cr - credentials of caller. 1805fa9e4066Sahrens * 1806fa9e4066Sahrens * OUT: vap - attribute values. 1807fa9e4066Sahrens * 1808fa9e4066Sahrens * RETURN: 0 (always succeeds) 1809fa9e4066Sahrens */ 1810fa9e4066Sahrens /* ARGSUSED */ 1811fa9e4066Sahrens static int 1812fa9e4066Sahrens zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr) 1813fa9e4066Sahrens { 1814fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1815fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1816fa9e4066Sahrens znode_phys_t *pzp = zp->z_phys; 1817fa9e4066Sahrens int error; 1818fa9e4066Sahrens 1819fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1820fa9e4066Sahrens 1821fa9e4066Sahrens /* 1822fa9e4066Sahrens * Return all attributes. It's cheaper to provide the answer 1823fa9e4066Sahrens * than to determine whether we were asked the question. 1824fa9e4066Sahrens */ 1825fa9e4066Sahrens mutex_enter(&zp->z_lock); 1826fa9e4066Sahrens 1827fa9e4066Sahrens vap->va_type = vp->v_type; 1828fa9e4066Sahrens vap->va_mode = pzp->zp_mode & MODEMASK; 1829fa9e4066Sahrens vap->va_uid = zp->z_phys->zp_uid; 1830fa9e4066Sahrens vap->va_gid = zp->z_phys->zp_gid; 1831fa9e4066Sahrens vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 1832fa9e4066Sahrens vap->va_nodeid = zp->z_id; 1833fa9e4066Sahrens vap->va_nlink = MIN(pzp->zp_links, UINT32_MAX); /* nlink_t limit! */ 1834fa9e4066Sahrens vap->va_size = pzp->zp_size; 183572fc53bcSmarks vap->va_rdev = vp->v_rdev; 1836fa9e4066Sahrens vap->va_seq = zp->z_seq; 1837fa9e4066Sahrens 1838fa9e4066Sahrens ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime); 1839fa9e4066Sahrens ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime); 1840fa9e4066Sahrens ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime); 1841fa9e4066Sahrens 1842fa9e4066Sahrens /* 1843de122929Smarks * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 1844de122929Smarks * Also, if we are the owner don't bother, since owner should 1845de122929Smarks * always be allowed to read basic attributes of file. 1846fa9e4066Sahrens */ 1847de122929Smarks if (!(zp->z_phys->zp_flags & ZFS_ACL_TRIVIAL) && 1848de122929Smarks (zp->z_phys->zp_uid != crgetuid(cr))) { 1849de122929Smarks if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, cr)) { 1850fa9e4066Sahrens mutex_exit(&zp->z_lock); 1851fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1852fa9e4066Sahrens return (error); 1853fa9e4066Sahrens } 1854fa9e4066Sahrens } 1855fa9e4066Sahrens 1856fa9e4066Sahrens mutex_exit(&zp->z_lock); 1857fa9e4066Sahrens 1858fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks); 1859fa9e4066Sahrens 1860fa9e4066Sahrens if (zp->z_blksz == 0) { 1861fa9e4066Sahrens /* 1862fa9e4066Sahrens * Block size hasn't been set; suggest maximal I/O transfers. 1863fa9e4066Sahrens */ 1864fa9e4066Sahrens vap->va_blksize = zfsvfs->z_max_blksz; 1865fa9e4066Sahrens } 1866fa9e4066Sahrens 1867fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1868fa9e4066Sahrens return (0); 1869fa9e4066Sahrens } 1870fa9e4066Sahrens 1871fa9e4066Sahrens /* 1872fa9e4066Sahrens * Set the file attributes to the values contained in the 1873fa9e4066Sahrens * vattr structure. 1874fa9e4066Sahrens * 1875fa9e4066Sahrens * IN: vp - vnode of file to be modified. 1876fa9e4066Sahrens * vap - new attribute values. 1877fa9e4066Sahrens * flags - ATTR_UTIME set if non-default time values provided. 1878fa9e4066Sahrens * cr - credentials of caller. 1879fa9e4066Sahrens * 1880fa9e4066Sahrens * RETURN: 0 if success 1881fa9e4066Sahrens * error code if failure 1882fa9e4066Sahrens * 1883fa9e4066Sahrens * Timestamps: 1884fa9e4066Sahrens * vp - ctime updated, mtime updated if size changed. 1885fa9e4066Sahrens */ 1886fa9e4066Sahrens /* ARGSUSED */ 1887fa9e4066Sahrens static int 1888fa9e4066Sahrens zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 1889fa9e4066Sahrens caller_context_t *ct) 1890fa9e4066Sahrens { 1891fa9e4066Sahrens struct znode *zp = VTOZ(vp); 1892fa9e4066Sahrens znode_phys_t *pzp = zp->z_phys; 1893fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1894fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1895fa9e4066Sahrens dmu_tx_t *tx; 1896fa9e4066Sahrens vattr_t oldva; 18975730cc9aSmaybee uint_t mask = vap->va_mask; 18985730cc9aSmaybee uint_t saved_mask; 1899f92daba9Smarks int trim_mask = 0; 1900fa9e4066Sahrens uint64_t new_mode; 1901d2443e76Smarks znode_t *attrzp; 1902fa9e4066Sahrens int need_policy = FALSE; 1903fa9e4066Sahrens int err; 1904fa9e4066Sahrens 1905fa9e4066Sahrens if (mask == 0) 1906fa9e4066Sahrens return (0); 1907fa9e4066Sahrens 1908fa9e4066Sahrens if (mask & AT_NOSET) 1909fa9e4066Sahrens return (EINVAL); 1910fa9e4066Sahrens 1911fa9e4066Sahrens if (mask & AT_SIZE && vp->v_type == VDIR) 1912fa9e4066Sahrens return (EISDIR); 1913fa9e4066Sahrens 19148ef9dde0Smarks if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) 191584c5a155Smarks return (EINVAL); 191684c5a155Smarks 1917fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1918fa9e4066Sahrens 1919fa9e4066Sahrens top: 1920d2443e76Smarks attrzp = NULL; 1921fa9e4066Sahrens 1922fa9e4066Sahrens if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 1923fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1924fa9e4066Sahrens return (EROFS); 1925fa9e4066Sahrens } 1926fa9e4066Sahrens 1927fa9e4066Sahrens /* 1928fa9e4066Sahrens * First validate permissions 1929fa9e4066Sahrens */ 1930fa9e4066Sahrens 1931fa9e4066Sahrens if (mask & AT_SIZE) { 1932fa9e4066Sahrens err = zfs_zaccess(zp, ACE_WRITE_DATA, cr); 1933fa9e4066Sahrens if (err) { 1934fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1935fa9e4066Sahrens return (err); 1936fa9e4066Sahrens } 19375730cc9aSmaybee /* 19385730cc9aSmaybee * XXX - Note, we are not providing any open 19395730cc9aSmaybee * mode flags here (like FNDELAY), so we may 19405730cc9aSmaybee * block if there are locks present... this 19415730cc9aSmaybee * should be addressed in openat(). 19425730cc9aSmaybee */ 19435730cc9aSmaybee do { 19445730cc9aSmaybee err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 19458a2f1b91Sahrens /* NB: we already did dmu_tx_wait() if necessary */ 19465730cc9aSmaybee } while (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT); 19475730cc9aSmaybee if (err) { 19485730cc9aSmaybee ZFS_EXIT(zfsvfs); 19495730cc9aSmaybee return (err); 19505730cc9aSmaybee } 1951fa9e4066Sahrens } 1952fa9e4066Sahrens 1953fa9e4066Sahrens if (mask & (AT_ATIME|AT_MTIME)) 1954fa9e4066Sahrens need_policy = zfs_zaccess_v4_perm(zp, ACE_WRITE_ATTRIBUTES, cr); 1955fa9e4066Sahrens 1956fa9e4066Sahrens if (mask & (AT_UID|AT_GID)) { 1957fa9e4066Sahrens int idmask = (mask & (AT_UID|AT_GID)); 1958fa9e4066Sahrens int take_owner; 1959fa9e4066Sahrens int take_group; 1960fa9e4066Sahrens 1961a933bc41Smarks /* 1962a933bc41Smarks * NOTE: even if a new mode is being set, 1963a933bc41Smarks * we may clear S_ISUID/S_ISGID bits. 1964a933bc41Smarks */ 1965a933bc41Smarks 1966a933bc41Smarks if (!(mask & AT_MODE)) 1967a933bc41Smarks vap->va_mode = pzp->zp_mode; 1968a933bc41Smarks 1969fa9e4066Sahrens /* 1970fa9e4066Sahrens * Take ownership or chgrp to group we are a member of 1971fa9e4066Sahrens */ 1972fa9e4066Sahrens 1973fa9e4066Sahrens take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 1974fa9e4066Sahrens take_group = (mask & AT_GID) && groupmember(vap->va_gid, cr); 1975fa9e4066Sahrens 1976fa9e4066Sahrens /* 1977fa9e4066Sahrens * If both AT_UID and AT_GID are set then take_owner and 1978fa9e4066Sahrens * take_group must both be set in order to allow taking 1979fa9e4066Sahrens * ownership. 1980fa9e4066Sahrens * 1981fa9e4066Sahrens * Otherwise, send the check through secpolicy_vnode_setattr() 1982fa9e4066Sahrens * 1983fa9e4066Sahrens */ 1984fa9e4066Sahrens 1985fa9e4066Sahrens if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 1986fa9e4066Sahrens ((idmask == AT_UID) && take_owner) || 1987fa9e4066Sahrens ((idmask == AT_GID) && take_group)) { 1988fa9e4066Sahrens if (zfs_zaccess_v4_perm(zp, ACE_WRITE_OWNER, cr) == 0) { 1989fa9e4066Sahrens /* 1990fa9e4066Sahrens * Remove setuid/setgid for non-privileged users 1991fa9e4066Sahrens */ 199213f9f30eSmarks secpolicy_setid_clear(vap, cr); 1993f92daba9Smarks trim_mask = (mask & (AT_UID|AT_GID)); 1994fa9e4066Sahrens } else { 1995fa9e4066Sahrens need_policy = TRUE; 1996fa9e4066Sahrens } 1997fa9e4066Sahrens } else { 1998fa9e4066Sahrens need_policy = TRUE; 1999fa9e4066Sahrens } 2000fa9e4066Sahrens } 2001fa9e4066Sahrens 2002f92daba9Smarks mutex_enter(&zp->z_lock); 2003f92daba9Smarks oldva.va_mode = pzp->zp_mode; 2004f92daba9Smarks oldva.va_uid = zp->z_phys->zp_uid; 2005f92daba9Smarks oldva.va_gid = zp->z_phys->zp_gid; 2006f92daba9Smarks mutex_exit(&zp->z_lock); 2007fa9e4066Sahrens 2008f92daba9Smarks if (mask & AT_MODE) { 2009f92daba9Smarks if (zfs_zaccess_v4_perm(zp, ACE_WRITE_ACL, cr) == 0) { 2010f92daba9Smarks err = secpolicy_setid_setsticky_clear(vp, vap, 2011f92daba9Smarks &oldva, cr); 2012f92daba9Smarks if (err) { 2013f92daba9Smarks ZFS_EXIT(zfsvfs); 2014f92daba9Smarks return (err); 2015f92daba9Smarks } 2016f92daba9Smarks trim_mask |= AT_MODE; 2017f92daba9Smarks } else { 2018f92daba9Smarks need_policy = TRUE; 2019f92daba9Smarks } 2020f92daba9Smarks } 202113f9f30eSmarks 2022f92daba9Smarks if (need_policy) { 202313f9f30eSmarks /* 202413f9f30eSmarks * If trim_mask is set then take ownership 2025f92daba9Smarks * has been granted or write_acl is present and user 2026f92daba9Smarks * has the ability to modify mode. In that case remove 2027f92daba9Smarks * UID|GID and or MODE from mask so that 202813f9f30eSmarks * secpolicy_vnode_setattr() doesn't revoke it. 202913f9f30eSmarks */ 203013f9f30eSmarks 2031f92daba9Smarks if (trim_mask) { 2032f92daba9Smarks saved_mask = vap->va_mask; 2033f92daba9Smarks vap->va_mask &= ~trim_mask; 2034f92daba9Smarks 2035f92daba9Smarks } 2036fa9e4066Sahrens err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 2037fa9e4066Sahrens (int (*)(void *, int, cred_t *))zfs_zaccess_rwx, zp); 2038fa9e4066Sahrens if (err) { 2039fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2040fa9e4066Sahrens return (err); 2041fa9e4066Sahrens } 204213f9f30eSmarks 204313f9f30eSmarks if (trim_mask) 2044f92daba9Smarks vap->va_mask |= saved_mask; 2045fa9e4066Sahrens } 2046fa9e4066Sahrens 2047fa9e4066Sahrens /* 2048fa9e4066Sahrens * secpolicy_vnode_setattr, or take ownership may have 2049fa9e4066Sahrens * changed va_mask 2050fa9e4066Sahrens */ 2051fa9e4066Sahrens mask = vap->va_mask; 2052fa9e4066Sahrens 2053fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2054fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 2055fa9e4066Sahrens 2056fa9e4066Sahrens if (mask & AT_MODE) { 2057169cdae2Smarks uint64_t pmode = pzp->zp_mode; 2058fa9e4066Sahrens 2059169cdae2Smarks new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 2060fa9e4066Sahrens 2061fa9e4066Sahrens if (zp->z_phys->zp_acl.z_acl_extern_obj) 2062fa9e4066Sahrens dmu_tx_hold_write(tx, 2063fa9e4066Sahrens pzp->zp_acl.z_acl_extern_obj, 0, SPA_MAXBLOCKSIZE); 2064fa9e4066Sahrens else 2065fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 2066fa9e4066Sahrens 0, ZFS_ACL_SIZE(MAX_ACL_SIZE)); 2067fa9e4066Sahrens } 2068fa9e4066Sahrens 2069d2443e76Smarks if ((mask & (AT_UID | AT_GID)) && zp->z_phys->zp_xattr != 0) { 2070d2443e76Smarks err = zfs_zget(zp->z_zfsvfs, zp->z_phys->zp_xattr, &attrzp); 2071d2443e76Smarks if (err) { 2072d2443e76Smarks dmu_tx_abort(tx); 2073d2443e76Smarks ZFS_EXIT(zfsvfs); 2074d2443e76Smarks return (err); 2075d2443e76Smarks } 2076d2443e76Smarks dmu_tx_hold_bonus(tx, attrzp->z_id); 2077d2443e76Smarks } 2078d2443e76Smarks 2079fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 2080fa9e4066Sahrens if (err) { 2081d2443e76Smarks if (attrzp) 2082d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2083fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 20848a2f1b91Sahrens dmu_tx_wait(tx); 20858a2f1b91Sahrens dmu_tx_abort(tx); 2086fa9e4066Sahrens goto top; 2087fa9e4066Sahrens } 20888a2f1b91Sahrens dmu_tx_abort(tx); 2089fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2090fa9e4066Sahrens return (err); 2091fa9e4066Sahrens } 2092fa9e4066Sahrens 2093fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 2094fa9e4066Sahrens 2095fa9e4066Sahrens /* 2096fa9e4066Sahrens * Set each attribute requested. 2097fa9e4066Sahrens * We group settings according to the locks they need to acquire. 2098fa9e4066Sahrens * 2099fa9e4066Sahrens * Note: you cannot set ctime directly, although it will be 2100fa9e4066Sahrens * updated as a side-effect of calling this function. 2101fa9e4066Sahrens */ 2102fa9e4066Sahrens 2103fa9e4066Sahrens mutex_enter(&zp->z_lock); 2104fa9e4066Sahrens 2105fa9e4066Sahrens if (mask & AT_MODE) { 2106fa9e4066Sahrens err = zfs_acl_chmod_setattr(zp, new_mode, tx); 2107fa9e4066Sahrens ASSERT3U(err, ==, 0); 2108fa9e4066Sahrens } 2109fa9e4066Sahrens 2110d2443e76Smarks if (attrzp) 2111d2443e76Smarks mutex_enter(&attrzp->z_lock); 2112d2443e76Smarks 2113d2443e76Smarks if (mask & AT_UID) { 2114fa9e4066Sahrens zp->z_phys->zp_uid = (uint64_t)vap->va_uid; 2115d2443e76Smarks if (attrzp) { 2116d2443e76Smarks attrzp->z_phys->zp_uid = (uint64_t)vap->va_uid; 2117d2443e76Smarks } 2118d2443e76Smarks } 2119fa9e4066Sahrens 2120d2443e76Smarks if (mask & AT_GID) { 2121fa9e4066Sahrens zp->z_phys->zp_gid = (uint64_t)vap->va_gid; 2122d2443e76Smarks if (attrzp) 2123d2443e76Smarks attrzp->z_phys->zp_gid = (uint64_t)vap->va_gid; 2124d2443e76Smarks } 2125d2443e76Smarks 2126d2443e76Smarks if (attrzp) 2127d2443e76Smarks mutex_exit(&attrzp->z_lock); 2128fa9e4066Sahrens 2129fa9e4066Sahrens if (mask & AT_ATIME) 2130fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 2131fa9e4066Sahrens 2132fa9e4066Sahrens if (mask & AT_MTIME) 2133fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 2134fa9e4066Sahrens 21355730cc9aSmaybee if (mask & AT_SIZE) 2136fa9e4066Sahrens zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx); 21375730cc9aSmaybee else if (mask != 0) 2138fa9e4066Sahrens zfs_time_stamper_locked(zp, STATE_CHANGED, tx); 2139fa9e4066Sahrens 21405730cc9aSmaybee if (mask != 0) 2141b19a79ecSperrin zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask); 2142fa9e4066Sahrens 2143fa9e4066Sahrens mutex_exit(&zp->z_lock); 2144fa9e4066Sahrens 2145d2443e76Smarks if (attrzp) 2146d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2147d2443e76Smarks 2148fa9e4066Sahrens dmu_tx_commit(tx); 2149fa9e4066Sahrens 2150fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2151fa9e4066Sahrens return (err); 2152fa9e4066Sahrens } 2153fa9e4066Sahrens 2154fa9e4066Sahrens typedef struct zfs_zlock { 2155fa9e4066Sahrens krwlock_t *zl_rwlock; /* lock we acquired */ 2156fa9e4066Sahrens znode_t *zl_znode; /* znode we held */ 2157fa9e4066Sahrens struct zfs_zlock *zl_next; /* next in list */ 2158fa9e4066Sahrens } zfs_zlock_t; 2159fa9e4066Sahrens 2160ff008e00Smaybee /* 2161ff008e00Smaybee * Drop locks and release vnodes that were held by zfs_rename_lock(). 2162ff008e00Smaybee */ 2163ff008e00Smaybee static void 2164ff008e00Smaybee zfs_rename_unlock(zfs_zlock_t **zlpp) 2165ff008e00Smaybee { 2166ff008e00Smaybee zfs_zlock_t *zl; 2167ff008e00Smaybee 2168ff008e00Smaybee while ((zl = *zlpp) != NULL) { 2169ff008e00Smaybee if (zl->zl_znode != NULL) 2170ff008e00Smaybee VN_RELE(ZTOV(zl->zl_znode)); 2171ff008e00Smaybee rw_exit(zl->zl_rwlock); 2172ff008e00Smaybee *zlpp = zl->zl_next; 2173ff008e00Smaybee kmem_free(zl, sizeof (*zl)); 2174ff008e00Smaybee } 2175ff008e00Smaybee } 2176ff008e00Smaybee 2177ff008e00Smaybee /* 2178ff008e00Smaybee * Search back through the directory tree, using the ".." entries. 2179ff008e00Smaybee * Lock each directory in the chain to prevent concurrent renames. 2180ff008e00Smaybee * Fail any attempt to move a directory into one of its own descendants. 2181ff008e00Smaybee * XXX - z_parent_lock can overlap with map or grow locks 2182ff008e00Smaybee */ 2183fa9e4066Sahrens static int 2184fa9e4066Sahrens zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 2185fa9e4066Sahrens { 2186fa9e4066Sahrens zfs_zlock_t *zl; 2187*feb08c6bSbillm znode_t *zp = tdzp; 2188fa9e4066Sahrens uint64_t rootid = zp->z_zfsvfs->z_root; 2189fa9e4066Sahrens uint64_t *oidp = &zp->z_id; 2190fa9e4066Sahrens krwlock_t *rwlp = &szp->z_parent_lock; 2191fa9e4066Sahrens krw_t rw = RW_WRITER; 2192fa9e4066Sahrens 2193fa9e4066Sahrens /* 2194fa9e4066Sahrens * First pass write-locks szp and compares to zp->z_id. 2195fa9e4066Sahrens * Later passes read-lock zp and compare to zp->z_parent. 2196fa9e4066Sahrens */ 2197fa9e4066Sahrens do { 2198ff008e00Smaybee if (!rw_tryenter(rwlp, rw)) { 2199ff008e00Smaybee /* 2200ff008e00Smaybee * Another thread is renaming in this path. 2201ff008e00Smaybee * Note that if we are a WRITER, we don't have any 2202ff008e00Smaybee * parent_locks held yet. 2203ff008e00Smaybee */ 2204ff008e00Smaybee if (rw == RW_READER && zp->z_id > szp->z_id) { 2205ff008e00Smaybee /* 2206ff008e00Smaybee * Drop our locks and restart 2207ff008e00Smaybee */ 2208ff008e00Smaybee zfs_rename_unlock(&zl); 2209ff008e00Smaybee *zlpp = NULL; 2210ff008e00Smaybee zp = tdzp; 2211ff008e00Smaybee oidp = &zp->z_id; 2212ff008e00Smaybee rwlp = &szp->z_parent_lock; 2213ff008e00Smaybee rw = RW_WRITER; 2214ff008e00Smaybee continue; 2215ff008e00Smaybee } else { 2216ff008e00Smaybee /* 2217ff008e00Smaybee * Wait for other thread to drop its locks 2218ff008e00Smaybee */ 2219ff008e00Smaybee rw_enter(rwlp, rw); 2220ff008e00Smaybee } 2221ff008e00Smaybee } 2222ff008e00Smaybee 2223fa9e4066Sahrens zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 2224fa9e4066Sahrens zl->zl_rwlock = rwlp; 2225fa9e4066Sahrens zl->zl_znode = NULL; 2226fa9e4066Sahrens zl->zl_next = *zlpp; 2227fa9e4066Sahrens *zlpp = zl; 2228fa9e4066Sahrens 2229fa9e4066Sahrens if (*oidp == szp->z_id) /* We're a descendant of szp */ 2230fa9e4066Sahrens return (EINVAL); 2231fa9e4066Sahrens 2232fa9e4066Sahrens if (*oidp == rootid) /* We've hit the top */ 2233fa9e4066Sahrens return (0); 2234fa9e4066Sahrens 2235fa9e4066Sahrens if (rw == RW_READER) { /* i.e. not the first pass */ 2236fa9e4066Sahrens int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp); 2237fa9e4066Sahrens if (error) 2238fa9e4066Sahrens return (error); 2239fa9e4066Sahrens zl->zl_znode = zp; 2240fa9e4066Sahrens } 2241fa9e4066Sahrens oidp = &zp->z_phys->zp_parent; 2242fa9e4066Sahrens rwlp = &zp->z_parent_lock; 2243fa9e4066Sahrens rw = RW_READER; 2244fa9e4066Sahrens 2245fa9e4066Sahrens } while (zp->z_id != sdzp->z_id); 2246fa9e4066Sahrens 2247fa9e4066Sahrens return (0); 2248fa9e4066Sahrens } 2249fa9e4066Sahrens 2250fa9e4066Sahrens /* 2251fa9e4066Sahrens * Move an entry from the provided source directory to the target 2252fa9e4066Sahrens * directory. Change the entry name as indicated. 2253fa9e4066Sahrens * 2254fa9e4066Sahrens * IN: sdvp - Source directory containing the "old entry". 2255fa9e4066Sahrens * snm - Old entry name. 2256fa9e4066Sahrens * tdvp - Target directory to contain the "new entry". 2257fa9e4066Sahrens * tnm - New entry name. 2258fa9e4066Sahrens * cr - credentials of caller. 2259fa9e4066Sahrens * 2260fa9e4066Sahrens * RETURN: 0 if success 2261fa9e4066Sahrens * error code if failure 2262fa9e4066Sahrens * 2263fa9e4066Sahrens * Timestamps: 2264fa9e4066Sahrens * sdvp,tdvp - ctime|mtime updated 2265fa9e4066Sahrens */ 2266fa9e4066Sahrens static int 2267fa9e4066Sahrens zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr) 2268fa9e4066Sahrens { 2269fa9e4066Sahrens znode_t *tdzp, *szp, *tzp; 2270fa9e4066Sahrens znode_t *sdzp = VTOZ(sdvp); 2271fa9e4066Sahrens zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 2272fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2273fa9e4066Sahrens vnode_t *realvp; 2274fa9e4066Sahrens zfs_dirlock_t *sdl, *tdl; 2275fa9e4066Sahrens dmu_tx_t *tx; 2276fa9e4066Sahrens zfs_zlock_t *zl; 2277fa9e4066Sahrens int cmp, serr, terr, error; 2278fa9e4066Sahrens 2279fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2280fa9e4066Sahrens 2281fa9e4066Sahrens /* 2282fa9e4066Sahrens * Make sure we have the real vp for the target directory. 2283fa9e4066Sahrens */ 2284fa9e4066Sahrens if (VOP_REALVP(tdvp, &realvp) == 0) 2285fa9e4066Sahrens tdvp = realvp; 2286fa9e4066Sahrens 2287fa9e4066Sahrens if (tdvp->v_vfsp != sdvp->v_vfsp) { 2288fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2289fa9e4066Sahrens return (EXDEV); 2290fa9e4066Sahrens } 2291fa9e4066Sahrens 2292fa9e4066Sahrens tdzp = VTOZ(tdvp); 2293fa9e4066Sahrens top: 2294fa9e4066Sahrens szp = NULL; 2295fa9e4066Sahrens tzp = NULL; 2296fa9e4066Sahrens zl = NULL; 2297fa9e4066Sahrens 2298fa9e4066Sahrens /* 2299fa9e4066Sahrens * This is to prevent the creation of links into attribute space 2300fa9e4066Sahrens * by renaming a linked file into/outof an attribute directory. 2301fa9e4066Sahrens * See the comment in zfs_link() for why this is considered bad. 2302fa9e4066Sahrens */ 2303fa9e4066Sahrens if ((tdzp->z_phys->zp_flags & ZFS_XATTR) != 2304fa9e4066Sahrens (sdzp->z_phys->zp_flags & ZFS_XATTR)) { 2305fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2306fa9e4066Sahrens return (EINVAL); 2307fa9e4066Sahrens } 2308fa9e4066Sahrens 2309fa9e4066Sahrens /* 2310fa9e4066Sahrens * Lock source and target directory entries. To prevent deadlock, 2311fa9e4066Sahrens * a lock ordering must be defined. We lock the directory with 2312fa9e4066Sahrens * the smallest object id first, or if it's a tie, the one with 2313fa9e4066Sahrens * the lexically first name. 2314fa9e4066Sahrens */ 2315fa9e4066Sahrens if (sdzp->z_id < tdzp->z_id) { 2316fa9e4066Sahrens cmp = -1; 2317fa9e4066Sahrens } else if (sdzp->z_id > tdzp->z_id) { 2318fa9e4066Sahrens cmp = 1; 2319fa9e4066Sahrens } else { 2320fa9e4066Sahrens cmp = strcmp(snm, tnm); 2321fa9e4066Sahrens if (cmp == 0) { 2322fa9e4066Sahrens /* 2323fa9e4066Sahrens * POSIX: "If the old argument and the new argument 2324fa9e4066Sahrens * both refer to links to the same existing file, 2325fa9e4066Sahrens * the rename() function shall return successfully 2326fa9e4066Sahrens * and perform no other action." 2327fa9e4066Sahrens */ 2328fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2329fa9e4066Sahrens return (0); 2330fa9e4066Sahrens } 2331fa9e4066Sahrens } 2332fa9e4066Sahrens if (cmp < 0) { 2333fa9e4066Sahrens serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, ZEXISTS); 2334fa9e4066Sahrens terr = zfs_dirent_lock(&tdl, tdzp, tnm, &tzp, 0); 2335fa9e4066Sahrens } else { 2336fa9e4066Sahrens terr = zfs_dirent_lock(&tdl, tdzp, tnm, &tzp, 0); 2337fa9e4066Sahrens serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, ZEXISTS); 2338fa9e4066Sahrens } 2339fa9e4066Sahrens 2340fa9e4066Sahrens if (serr) { 2341fa9e4066Sahrens /* 2342fa9e4066Sahrens * Source entry invalid or not there. 2343fa9e4066Sahrens */ 2344fa9e4066Sahrens if (!terr) { 2345fa9e4066Sahrens zfs_dirent_unlock(tdl); 2346fa9e4066Sahrens if (tzp) 2347fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 2348fa9e4066Sahrens } 2349fa9e4066Sahrens if (strcmp(snm, "..") == 0) 2350fa9e4066Sahrens serr = EINVAL; 2351fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2352fa9e4066Sahrens return (serr); 2353fa9e4066Sahrens } 2354fa9e4066Sahrens if (terr) { 2355fa9e4066Sahrens zfs_dirent_unlock(sdl); 2356fa9e4066Sahrens VN_RELE(ZTOV(szp)); 2357fa9e4066Sahrens if (strcmp(tnm, "..") == 0) 2358fa9e4066Sahrens terr = EINVAL; 2359fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2360fa9e4066Sahrens return (terr); 2361fa9e4066Sahrens } 2362fa9e4066Sahrens 2363fa9e4066Sahrens /* 2364fa9e4066Sahrens * Must have write access at the source to remove the old entry 2365fa9e4066Sahrens * and write access at the target to create the new entry. 2366fa9e4066Sahrens * Note that if target and source are the same, this can be 2367fa9e4066Sahrens * done in a single check. 2368fa9e4066Sahrens */ 2369fa9e4066Sahrens 2370fa9e4066Sahrens if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 2371fa9e4066Sahrens goto out; 2372fa9e4066Sahrens 2373fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 2374fa9e4066Sahrens /* 2375fa9e4066Sahrens * Check to make sure rename is valid. 2376fa9e4066Sahrens * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 2377fa9e4066Sahrens */ 2378fa9e4066Sahrens if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 2379fa9e4066Sahrens goto out; 2380fa9e4066Sahrens } 2381fa9e4066Sahrens 2382fa9e4066Sahrens /* 2383fa9e4066Sahrens * Does target exist? 2384fa9e4066Sahrens */ 2385fa9e4066Sahrens if (tzp) { 2386fa9e4066Sahrens /* 2387fa9e4066Sahrens * Source and target must be the same type. 2388fa9e4066Sahrens */ 2389fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 2390fa9e4066Sahrens if (ZTOV(tzp)->v_type != VDIR) { 2391fa9e4066Sahrens error = ENOTDIR; 2392fa9e4066Sahrens goto out; 2393fa9e4066Sahrens } 2394fa9e4066Sahrens } else { 2395fa9e4066Sahrens if (ZTOV(tzp)->v_type == VDIR) { 2396fa9e4066Sahrens error = EISDIR; 2397fa9e4066Sahrens goto out; 2398fa9e4066Sahrens } 2399fa9e4066Sahrens } 2400fa9e4066Sahrens /* 2401fa9e4066Sahrens * POSIX dictates that when the source and target 2402fa9e4066Sahrens * entries refer to the same file object, rename 2403fa9e4066Sahrens * must do nothing and exit without error. 2404fa9e4066Sahrens */ 2405fa9e4066Sahrens if (szp->z_id == tzp->z_id) { 2406fa9e4066Sahrens error = 0; 2407fa9e4066Sahrens goto out; 2408fa9e4066Sahrens } 2409fa9e4066Sahrens } 2410fa9e4066Sahrens 2411fa9e4066Sahrens vnevent_rename_src(ZTOV(szp)); 2412fa9e4066Sahrens if (tzp) 2413fa9e4066Sahrens vnevent_rename_dest(ZTOV(tzp)); 2414fa9e4066Sahrens 2415fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2416fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */ 2417fa9e4066Sahrens dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */ 2418ea8dc4b6Seschrock dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); 2419ea8dc4b6Seschrock dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); 2420ea8dc4b6Seschrock if (sdzp != tdzp) 2421fa9e4066Sahrens dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */ 2422ea8dc4b6Seschrock if (tzp) 2423ea8dc4b6Seschrock dmu_tx_hold_bonus(tx, tzp->z_id); /* parent changes */ 2424893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 2425fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 2426fa9e4066Sahrens if (error) { 2427fa9e4066Sahrens if (zl != NULL) 2428fa9e4066Sahrens zfs_rename_unlock(&zl); 2429fa9e4066Sahrens zfs_dirent_unlock(sdl); 2430fa9e4066Sahrens zfs_dirent_unlock(tdl); 2431fa9e4066Sahrens VN_RELE(ZTOV(szp)); 2432fa9e4066Sahrens if (tzp) 2433fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 2434fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 24358a2f1b91Sahrens dmu_tx_wait(tx); 24368a2f1b91Sahrens dmu_tx_abort(tx); 2437fa9e4066Sahrens goto top; 2438fa9e4066Sahrens } 24398a2f1b91Sahrens dmu_tx_abort(tx); 2440fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2441fa9e4066Sahrens return (error); 2442fa9e4066Sahrens } 2443fa9e4066Sahrens 2444fa9e4066Sahrens if (tzp) /* Attempt to remove the existing target */ 2445fa9e4066Sahrens error = zfs_link_destroy(tdl, tzp, tx, 0, NULL); 2446fa9e4066Sahrens 2447fa9e4066Sahrens if (error == 0) { 2448fa9e4066Sahrens error = zfs_link_create(tdl, szp, tx, ZRENAMING); 2449fa9e4066Sahrens if (error == 0) { 2450fa9e4066Sahrens error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 2451fa9e4066Sahrens ASSERT(error == 0); 2452b19a79ecSperrin zfs_log_rename(zilog, tx, TX_RENAME, sdzp, 2453b19a79ecSperrin sdl->dl_name, tdzp, tdl->dl_name, szp); 2454fa9e4066Sahrens } 2455fa9e4066Sahrens } 2456fa9e4066Sahrens 2457fa9e4066Sahrens dmu_tx_commit(tx); 2458fa9e4066Sahrens out: 2459fa9e4066Sahrens if (zl != NULL) 2460fa9e4066Sahrens zfs_rename_unlock(&zl); 2461fa9e4066Sahrens 2462fa9e4066Sahrens zfs_dirent_unlock(sdl); 2463fa9e4066Sahrens zfs_dirent_unlock(tdl); 2464fa9e4066Sahrens 2465fa9e4066Sahrens VN_RELE(ZTOV(szp)); 2466fa9e4066Sahrens if (tzp) 2467fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 2468fa9e4066Sahrens 2469fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2470fa9e4066Sahrens return (error); 2471fa9e4066Sahrens } 2472fa9e4066Sahrens 2473fa9e4066Sahrens /* 2474fa9e4066Sahrens * Insert the indicated symbolic reference entry into the directory. 2475fa9e4066Sahrens * 2476fa9e4066Sahrens * IN: dvp - Directory to contain new symbolic link. 2477fa9e4066Sahrens * link - Name for new symlink entry. 2478fa9e4066Sahrens * vap - Attributes of new entry. 2479fa9e4066Sahrens * target - Target path of new symlink. 2480fa9e4066Sahrens * cr - credentials of caller. 2481fa9e4066Sahrens * 2482fa9e4066Sahrens * RETURN: 0 if success 2483fa9e4066Sahrens * error code if failure 2484fa9e4066Sahrens * 2485fa9e4066Sahrens * Timestamps: 2486fa9e4066Sahrens * dvp - ctime|mtime updated 2487fa9e4066Sahrens */ 2488fa9e4066Sahrens static int 2489fa9e4066Sahrens zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr) 2490fa9e4066Sahrens { 2491fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 2492fa9e4066Sahrens zfs_dirlock_t *dl; 2493fa9e4066Sahrens dmu_tx_t *tx; 2494fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2495fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2496fa9e4066Sahrens uint64_t zoid; 2497fa9e4066Sahrens int len = strlen(link); 2498fa9e4066Sahrens int error; 2499fa9e4066Sahrens 2500fa9e4066Sahrens ASSERT(vap->va_type == VLNK); 2501fa9e4066Sahrens 2502fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2503fa9e4066Sahrens top: 2504fa9e4066Sahrens if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { 2505fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2506fa9e4066Sahrens return (error); 2507fa9e4066Sahrens } 2508fa9e4066Sahrens 2509fa9e4066Sahrens if (len > MAXPATHLEN) { 2510fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2511fa9e4066Sahrens return (ENAMETOOLONG); 2512fa9e4066Sahrens } 2513fa9e4066Sahrens 2514fa9e4066Sahrens /* 2515fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 2516fa9e4066Sahrens */ 2517fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZNEW)) { 2518fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2519fa9e4066Sahrens return (error); 2520fa9e4066Sahrens } 2521fa9e4066Sahrens 2522fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2523fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 2524fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 2525ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 2526fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 2527fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE); 2528fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 2529fa9e4066Sahrens if (error) { 2530fa9e4066Sahrens zfs_dirent_unlock(dl); 2531fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 25328a2f1b91Sahrens dmu_tx_wait(tx); 25338a2f1b91Sahrens dmu_tx_abort(tx); 2534fa9e4066Sahrens goto top; 2535fa9e4066Sahrens } 25368a2f1b91Sahrens dmu_tx_abort(tx); 2537fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2538fa9e4066Sahrens return (error); 2539fa9e4066Sahrens } 2540fa9e4066Sahrens 2541fa9e4066Sahrens dmu_buf_will_dirty(dzp->z_dbuf, tx); 2542fa9e4066Sahrens 2543fa9e4066Sahrens /* 2544fa9e4066Sahrens * Create a new object for the symlink. 2545fa9e4066Sahrens * Put the link content into bonus buffer if it will fit; 2546fa9e4066Sahrens * otherwise, store it just like any other file data. 2547fa9e4066Sahrens */ 2548fa9e4066Sahrens zoid = 0; 2549fa9e4066Sahrens if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) { 2550fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, len); 2551fa9e4066Sahrens if (len != 0) 2552fa9e4066Sahrens bcopy(link, zp->z_phys + 1, len); 2553fa9e4066Sahrens } else { 2554fa9e4066Sahrens dmu_buf_t *dbp; 2555104e2ed7Sperrin 2556fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); 2557fa9e4066Sahrens 2558104e2ed7Sperrin /* 2559104e2ed7Sperrin * Nothing can access the znode yet so no locking needed 2560104e2ed7Sperrin * for growing the znode's blocksize. 2561104e2ed7Sperrin */ 2562104e2ed7Sperrin zfs_grow_blocksize(zp, len, tx); 2563fa9e4066Sahrens 2564ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zfsvfs->z_os, zoid, 0, FTAG, &dbp)); 2565fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 2566fa9e4066Sahrens 2567fa9e4066Sahrens ASSERT3U(len, <=, dbp->db_size); 2568fa9e4066Sahrens bcopy(link, dbp->db_data, len); 2569ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 2570fa9e4066Sahrens } 2571fa9e4066Sahrens zp->z_phys->zp_size = len; 2572fa9e4066Sahrens 2573fa9e4066Sahrens /* 2574fa9e4066Sahrens * Insert the new object into the directory. 2575fa9e4066Sahrens */ 2576fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 2577fa9e4066Sahrens out: 2578fa9e4066Sahrens if (error == 0) 2579b19a79ecSperrin zfs_log_symlink(zilog, tx, TX_SYMLINK, dzp, zp, name, link); 2580fa9e4066Sahrens 2581fa9e4066Sahrens dmu_tx_commit(tx); 2582fa9e4066Sahrens 2583fa9e4066Sahrens zfs_dirent_unlock(dl); 2584fa9e4066Sahrens 2585fa9e4066Sahrens VN_RELE(ZTOV(zp)); 2586fa9e4066Sahrens 2587fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2588fa9e4066Sahrens return (error); 2589fa9e4066Sahrens } 2590fa9e4066Sahrens 2591fa9e4066Sahrens /* 2592fa9e4066Sahrens * Return, in the buffer contained in the provided uio structure, 2593fa9e4066Sahrens * the symbolic path referred to by vp. 2594fa9e4066Sahrens * 2595fa9e4066Sahrens * IN: vp - vnode of symbolic link. 2596fa9e4066Sahrens * uoip - structure to contain the link path. 2597fa9e4066Sahrens * cr - credentials of caller. 2598fa9e4066Sahrens * 2599fa9e4066Sahrens * OUT: uio - structure to contain the link path. 2600fa9e4066Sahrens * 2601fa9e4066Sahrens * RETURN: 0 if success 2602fa9e4066Sahrens * error code if failure 2603fa9e4066Sahrens * 2604fa9e4066Sahrens * Timestamps: 2605fa9e4066Sahrens * vp - atime updated 2606fa9e4066Sahrens */ 2607fa9e4066Sahrens /* ARGSUSED */ 2608fa9e4066Sahrens static int 2609fa9e4066Sahrens zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr) 2610fa9e4066Sahrens { 2611fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2612fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2613fa9e4066Sahrens size_t bufsz; 2614fa9e4066Sahrens int error; 2615fa9e4066Sahrens 2616fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2617fa9e4066Sahrens 2618fa9e4066Sahrens bufsz = (size_t)zp->z_phys->zp_size; 2619fa9e4066Sahrens if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) { 2620fa9e4066Sahrens error = uiomove(zp->z_phys + 1, 2621fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 2622fa9e4066Sahrens } else { 2623ea8dc4b6Seschrock dmu_buf_t *dbp; 2624ea8dc4b6Seschrock error = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0, FTAG, &dbp); 2625ea8dc4b6Seschrock if (error) { 2626fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2627fa9e4066Sahrens return (error); 2628fa9e4066Sahrens } 2629fa9e4066Sahrens error = uiomove(dbp->db_data, 2630fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 2631ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 2632fa9e4066Sahrens } 2633fa9e4066Sahrens 2634fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2635fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2636fa9e4066Sahrens return (error); 2637fa9e4066Sahrens } 2638fa9e4066Sahrens 2639fa9e4066Sahrens /* 2640fa9e4066Sahrens * Insert a new entry into directory tdvp referencing svp. 2641fa9e4066Sahrens * 2642fa9e4066Sahrens * IN: tdvp - Directory to contain new entry. 2643fa9e4066Sahrens * svp - vnode of new entry. 2644fa9e4066Sahrens * name - name of new entry. 2645fa9e4066Sahrens * cr - credentials of caller. 2646fa9e4066Sahrens * 2647fa9e4066Sahrens * RETURN: 0 if success 2648fa9e4066Sahrens * error code if failure 2649fa9e4066Sahrens * 2650fa9e4066Sahrens * Timestamps: 2651fa9e4066Sahrens * tdvp - ctime|mtime updated 2652fa9e4066Sahrens * svp - ctime updated 2653fa9e4066Sahrens */ 2654fa9e4066Sahrens /* ARGSUSED */ 2655fa9e4066Sahrens static int 2656fa9e4066Sahrens zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr) 2657fa9e4066Sahrens { 2658fa9e4066Sahrens znode_t *dzp = VTOZ(tdvp); 2659fa9e4066Sahrens znode_t *tzp, *szp; 2660fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2661fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2662fa9e4066Sahrens zfs_dirlock_t *dl; 2663fa9e4066Sahrens dmu_tx_t *tx; 2664fa9e4066Sahrens vnode_t *realvp; 2665fa9e4066Sahrens int error; 2666fa9e4066Sahrens 2667fa9e4066Sahrens ASSERT(tdvp->v_type == VDIR); 2668fa9e4066Sahrens 2669fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2670fa9e4066Sahrens 2671fa9e4066Sahrens if (VOP_REALVP(svp, &realvp) == 0) 2672fa9e4066Sahrens svp = realvp; 2673fa9e4066Sahrens 2674fa9e4066Sahrens if (svp->v_vfsp != tdvp->v_vfsp) { 2675fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2676fa9e4066Sahrens return (EXDEV); 2677fa9e4066Sahrens } 2678fa9e4066Sahrens 2679fa9e4066Sahrens szp = VTOZ(svp); 2680fa9e4066Sahrens top: 2681fa9e4066Sahrens /* 2682fa9e4066Sahrens * We do not support links between attributes and non-attributes 2683fa9e4066Sahrens * because of the potential security risk of creating links 2684fa9e4066Sahrens * into "normal" file space in order to circumvent restrictions 2685fa9e4066Sahrens * imposed in attribute space. 2686fa9e4066Sahrens */ 2687fa9e4066Sahrens if ((szp->z_phys->zp_flags & ZFS_XATTR) != 2688fa9e4066Sahrens (dzp->z_phys->zp_flags & ZFS_XATTR)) { 2689fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2690fa9e4066Sahrens return (EINVAL); 2691fa9e4066Sahrens } 2692fa9e4066Sahrens 2693fa9e4066Sahrens /* 2694fa9e4066Sahrens * POSIX dictates that we return EPERM here. 2695fa9e4066Sahrens * Better choices include ENOTSUP or EISDIR. 2696fa9e4066Sahrens */ 2697fa9e4066Sahrens if (svp->v_type == VDIR) { 2698fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2699fa9e4066Sahrens return (EPERM); 2700fa9e4066Sahrens } 2701fa9e4066Sahrens 2702fa9e4066Sahrens if ((uid_t)szp->z_phys->zp_uid != crgetuid(cr) && 2703fa9e4066Sahrens secpolicy_basic_link(cr) != 0) { 2704fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2705fa9e4066Sahrens return (EPERM); 2706fa9e4066Sahrens } 2707fa9e4066Sahrens 2708fa9e4066Sahrens if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { 2709fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2710fa9e4066Sahrens return (error); 2711fa9e4066Sahrens } 2712fa9e4066Sahrens 2713fa9e4066Sahrens /* 2714fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 2715fa9e4066Sahrens */ 2716fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &tzp, ZNEW)) { 2717fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2718fa9e4066Sahrens return (error); 2719fa9e4066Sahrens } 2720fa9e4066Sahrens 2721fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2722fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); 2723ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 2724fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 2725fa9e4066Sahrens if (error) { 2726fa9e4066Sahrens zfs_dirent_unlock(dl); 2727fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 27288a2f1b91Sahrens dmu_tx_wait(tx); 27298a2f1b91Sahrens dmu_tx_abort(tx); 2730fa9e4066Sahrens goto top; 2731fa9e4066Sahrens } 27328a2f1b91Sahrens dmu_tx_abort(tx); 2733fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2734fa9e4066Sahrens return (error); 2735fa9e4066Sahrens } 2736fa9e4066Sahrens 2737fa9e4066Sahrens error = zfs_link_create(dl, szp, tx, 0); 2738fa9e4066Sahrens 2739fa9e4066Sahrens if (error == 0) 2740b19a79ecSperrin zfs_log_link(zilog, tx, TX_LINK, dzp, szp, name); 2741fa9e4066Sahrens 2742fa9e4066Sahrens dmu_tx_commit(tx); 2743fa9e4066Sahrens 2744fa9e4066Sahrens zfs_dirent_unlock(dl); 2745fa9e4066Sahrens 2746fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2747fa9e4066Sahrens return (error); 2748fa9e4066Sahrens } 2749fa9e4066Sahrens 2750fa9e4066Sahrens /* 2751fa9e4066Sahrens * zfs_null_putapage() is used when the file system has been force 2752fa9e4066Sahrens * unmounted. It just drops the pages. 2753fa9e4066Sahrens */ 2754fa9e4066Sahrens /* ARGSUSED */ 2755fa9e4066Sahrens static int 2756fa9e4066Sahrens zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 2757fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 2758fa9e4066Sahrens { 2759fa9e4066Sahrens pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 2760fa9e4066Sahrens return (0); 2761fa9e4066Sahrens } 2762fa9e4066Sahrens 276344eda4d7Smaybee /* 276444eda4d7Smaybee * Push a page out to disk, klustering if possible. 276544eda4d7Smaybee * 276644eda4d7Smaybee * IN: vp - file to push page to. 276744eda4d7Smaybee * pp - page to push. 276844eda4d7Smaybee * flags - additional flags. 276944eda4d7Smaybee * cr - credentials of caller. 277044eda4d7Smaybee * 277144eda4d7Smaybee * OUT: offp - start of range pushed. 277244eda4d7Smaybee * lenp - len of range pushed. 277344eda4d7Smaybee * 277444eda4d7Smaybee * RETURN: 0 if success 277544eda4d7Smaybee * error code if failure 277644eda4d7Smaybee * 277744eda4d7Smaybee * NOTE: callers must have locked the page to be pushed. On 277844eda4d7Smaybee * exit, the page (and all other pages in the kluster) must be 277944eda4d7Smaybee * unlocked. 278044eda4d7Smaybee */ 2781fa9e4066Sahrens /* ARGSUSED */ 2782fa9e4066Sahrens static int 2783fa9e4066Sahrens zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 2784fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 2785fa9e4066Sahrens { 2786fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2787fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2788fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2789fa9e4066Sahrens dmu_tx_t *tx; 2790104e2ed7Sperrin rl_t *rl; 279144eda4d7Smaybee u_offset_t off, koff; 279244eda4d7Smaybee size_t len, klen; 2793fa9e4066Sahrens int err; 2794fa9e4066Sahrens 2795fa9e4066Sahrens off = pp->p_offset; 279644eda4d7Smaybee len = PAGESIZE; 279744eda4d7Smaybee /* 279844eda4d7Smaybee * If our blocksize is bigger than the page size, try to kluster 279944eda4d7Smaybee * muiltiple pages so that we write a full block (thus avoiding 280044eda4d7Smaybee * a read-modify-write). 280144eda4d7Smaybee */ 280244eda4d7Smaybee if (zp->z_blksz > PAGESIZE) { 280344eda4d7Smaybee uint64_t filesz = zp->z_phys->zp_size; 280444eda4d7Smaybee 280544eda4d7Smaybee if (!ISP2(zp->z_blksz)) { 280644eda4d7Smaybee /* Only one block in the file. */ 280744eda4d7Smaybee klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 280844eda4d7Smaybee koff = 0; 280944eda4d7Smaybee } else { 281044eda4d7Smaybee klen = zp->z_blksz; 281144eda4d7Smaybee koff = P2ALIGN(off, (u_offset_t)klen); 281244eda4d7Smaybee } 281344eda4d7Smaybee ASSERT(koff <= filesz); 281444eda4d7Smaybee if (koff + klen > filesz) 281544eda4d7Smaybee klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE); 281644eda4d7Smaybee pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); 281744eda4d7Smaybee } 281844eda4d7Smaybee ASSERT3U(btop(len), ==, btopr(len)); 281944eda4d7Smaybee top: 282044eda4d7Smaybee rl = zfs_range_lock(zp, off, len, RL_WRITER); 2821dd6ef538Smaybee /* 2822dd6ef538Smaybee * Can't push pages past end-of-file. 2823dd6ef538Smaybee */ 2824dd6ef538Smaybee if (off >= zp->z_phys->zp_size) { 282544eda4d7Smaybee /* discard all pages */ 282644eda4d7Smaybee flags |= B_INVAL; 282744eda4d7Smaybee err = 0; 282844eda4d7Smaybee goto out; 282944eda4d7Smaybee } else if (off + len > zp->z_phys->zp_size) { 283044eda4d7Smaybee int npages = btopr(zp->z_phys->zp_size - off); 283144eda4d7Smaybee page_t *trunc; 283244eda4d7Smaybee 283344eda4d7Smaybee page_list_break(&pp, &trunc, npages); 283444eda4d7Smaybee /* discard pages past end of file */ 283544eda4d7Smaybee if (trunc) 283644eda4d7Smaybee pvn_write_done(trunc, B_INVAL | flags); 283744eda4d7Smaybee len = zp->z_phys->zp_size - off; 2838dd6ef538Smaybee } 2839fa9e4066Sahrens 2840fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2841fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, off, len); 2842fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 2843fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 2844fa9e4066Sahrens if (err != 0) { 2845fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 284644eda4d7Smaybee zfs_range_unlock(rl); 28478a2f1b91Sahrens dmu_tx_wait(tx); 28488a2f1b91Sahrens dmu_tx_abort(tx); 284944eda4d7Smaybee err = 0; 2850fa9e4066Sahrens goto top; 2851fa9e4066Sahrens } 28528a2f1b91Sahrens dmu_tx_abort(tx); 2853fa9e4066Sahrens goto out; 2854fa9e4066Sahrens } 2855fa9e4066Sahrens 285644eda4d7Smaybee if (zp->z_blksz <= PAGESIZE) { 285744eda4d7Smaybee caddr_t va = ppmapin(pp, PROT_READ, (caddr_t)-1); 285844eda4d7Smaybee ASSERT3U(len, <=, PAGESIZE); 285944eda4d7Smaybee dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 286044eda4d7Smaybee ppmapout(va); 286144eda4d7Smaybee } else { 286244eda4d7Smaybee err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 286344eda4d7Smaybee } 2864fa9e4066Sahrens 286544eda4d7Smaybee if (err == 0) { 286644eda4d7Smaybee zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 2867*feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, off, len, 0); 286844eda4d7Smaybee dmu_tx_commit(tx); 286944eda4d7Smaybee } 2870fa9e4066Sahrens 287144eda4d7Smaybee out: 2872c5c6ffa0Smaybee zfs_range_unlock(rl); 287344eda4d7Smaybee pvn_write_done(pp, (err ? B_ERROR : 0) | B_WRITE | flags); 2874fa9e4066Sahrens if (offp) 2875fa9e4066Sahrens *offp = off; 2876fa9e4066Sahrens if (lenp) 2877fa9e4066Sahrens *lenp = len; 2878fa9e4066Sahrens 2879fa9e4066Sahrens return (err); 2880fa9e4066Sahrens } 2881fa9e4066Sahrens 2882fa9e4066Sahrens /* 2883fa9e4066Sahrens * Copy the portion of the file indicated from pages into the file. 2884fa9e4066Sahrens * The pages are stored in a page list attached to the files vnode. 2885fa9e4066Sahrens * 2886fa9e4066Sahrens * IN: vp - vnode of file to push page data to. 2887fa9e4066Sahrens * off - position in file to put data. 2888fa9e4066Sahrens * len - amount of data to write. 2889fa9e4066Sahrens * flags - flags to control the operation. 2890fa9e4066Sahrens * cr - credentials of caller. 2891fa9e4066Sahrens * 2892fa9e4066Sahrens * RETURN: 0 if success 2893fa9e4066Sahrens * error code if failure 2894fa9e4066Sahrens * 2895fa9e4066Sahrens * Timestamps: 2896fa9e4066Sahrens * vp - ctime|mtime updated 2897fa9e4066Sahrens */ 2898fa9e4066Sahrens static int 2899fa9e4066Sahrens zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr) 2900fa9e4066Sahrens { 2901fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2902fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2903fa9e4066Sahrens page_t *pp; 2904fa9e4066Sahrens size_t io_len; 2905fa9e4066Sahrens u_offset_t io_off; 2906104e2ed7Sperrin uint64_t filesz; 2907fa9e4066Sahrens int error = 0; 2908fa9e4066Sahrens 2909fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2910fa9e4066Sahrens 2911fa9e4066Sahrens ASSERT(zp->z_dbuf_held && zp->z_phys); 2912fa9e4066Sahrens 2913fa9e4066Sahrens if (len == 0) { 2914fa9e4066Sahrens /* 2915fa9e4066Sahrens * Search the entire vp list for pages >= off. 2916fa9e4066Sahrens */ 2917fa9e4066Sahrens error = pvn_vplist_dirty(vp, (u_offset_t)off, zfs_putapage, 2918fa9e4066Sahrens flags, cr); 2919fe9cf88cSperrin goto out; 2920fa9e4066Sahrens } 2921fa9e4066Sahrens 2922104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 2923104e2ed7Sperrin if (off > filesz) { 2924fa9e4066Sahrens /* past end of file */ 2925fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2926fa9e4066Sahrens return (0); 2927fa9e4066Sahrens } 2928fa9e4066Sahrens 2929104e2ed7Sperrin len = MIN(len, filesz - off); 2930fa9e4066Sahrens 2931fe9cf88cSperrin for (io_off = off; io_off < off + len; io_off += io_len) { 2932fa9e4066Sahrens if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 2933104e2ed7Sperrin pp = page_lookup(vp, io_off, 2934fa9e4066Sahrens (flags & (B_INVAL | B_FREE)) ? 2935fa9e4066Sahrens SE_EXCL : SE_SHARED); 2936fa9e4066Sahrens } else { 2937fa9e4066Sahrens pp = page_lookup_nowait(vp, io_off, 2938fa9e4066Sahrens (flags & B_FREE) ? SE_EXCL : SE_SHARED); 2939fa9e4066Sahrens } 2940fa9e4066Sahrens 2941fa9e4066Sahrens if (pp != NULL && pvn_getdirty(pp, flags)) { 2942fa9e4066Sahrens int err; 2943fa9e4066Sahrens 2944fa9e4066Sahrens /* 2945fa9e4066Sahrens * Found a dirty page to push 2946fa9e4066Sahrens */ 2947104e2ed7Sperrin err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 2948104e2ed7Sperrin if (err) 2949fa9e4066Sahrens error = err; 2950fa9e4066Sahrens } else { 2951fa9e4066Sahrens io_len = PAGESIZE; 2952fa9e4066Sahrens } 2953fa9e4066Sahrens } 2954fe9cf88cSperrin out: 2955b19a79ecSperrin if ((flags & B_ASYNC) == 0) 2956b19a79ecSperrin zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id); 2957fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2958fa9e4066Sahrens return (error); 2959fa9e4066Sahrens } 2960fa9e4066Sahrens 2961fa9e4066Sahrens void 2962fa9e4066Sahrens zfs_inactive(vnode_t *vp, cred_t *cr) 2963fa9e4066Sahrens { 2964fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2965fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2966fa9e4066Sahrens int error; 2967fa9e4066Sahrens 2968fa9e4066Sahrens rw_enter(&zfsvfs->z_um_lock, RW_READER); 2969fa9e4066Sahrens if (zfsvfs->z_unmounted2) { 2970fa9e4066Sahrens ASSERT(zp->z_dbuf_held == 0); 2971fa9e4066Sahrens 2972fa9e4066Sahrens if (vn_has_cached_data(vp)) { 2973fa9e4066Sahrens (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, 2974fa9e4066Sahrens B_INVAL, cr); 2975fa9e4066Sahrens } 2976fa9e4066Sahrens 2977ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 2978fa9e4066Sahrens vp->v_count = 0; /* count arrives as 1 */ 2979ea8dc4b6Seschrock if (zp->z_dbuf == NULL) { 2980ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 2981ea8dc4b6Seschrock zfs_znode_free(zp); 2982ea8dc4b6Seschrock } else { 2983ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 2984ea8dc4b6Seschrock } 2985fa9e4066Sahrens rw_exit(&zfsvfs->z_um_lock); 2986fa9e4066Sahrens VFS_RELE(zfsvfs->z_vfs); 2987fa9e4066Sahrens return; 2988fa9e4066Sahrens } 2989fa9e4066Sahrens 2990fa9e4066Sahrens /* 2991fa9e4066Sahrens * Attempt to push any data in the page cache. If this fails 2992fa9e4066Sahrens * we will get kicked out later in zfs_zinactive(). 2993fa9e4066Sahrens */ 29948afd4dd6Sperrin if (vn_has_cached_data(vp)) { 29958afd4dd6Sperrin (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, 29968afd4dd6Sperrin cr); 29978afd4dd6Sperrin } 2998fa9e4066Sahrens 2999893a6d32Sahrens if (zp->z_atime_dirty && zp->z_unlinked == 0) { 3000fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 3001fa9e4066Sahrens 3002fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3003fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 3004fa9e4066Sahrens if (error) { 3005fa9e4066Sahrens dmu_tx_abort(tx); 3006fa9e4066Sahrens } else { 3007fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 3008fa9e4066Sahrens mutex_enter(&zp->z_lock); 3009fa9e4066Sahrens zp->z_atime_dirty = 0; 3010fa9e4066Sahrens mutex_exit(&zp->z_lock); 3011fa9e4066Sahrens dmu_tx_commit(tx); 3012fa9e4066Sahrens } 3013fa9e4066Sahrens } 3014fa9e4066Sahrens 3015fa9e4066Sahrens zfs_zinactive(zp); 3016fa9e4066Sahrens rw_exit(&zfsvfs->z_um_lock); 3017fa9e4066Sahrens } 3018fa9e4066Sahrens 3019fa9e4066Sahrens /* 3020fa9e4066Sahrens * Bounds-check the seek operation. 3021fa9e4066Sahrens * 3022fa9e4066Sahrens * IN: vp - vnode seeking within 3023fa9e4066Sahrens * ooff - old file offset 3024fa9e4066Sahrens * noffp - pointer to new file offset 3025fa9e4066Sahrens * 3026fa9e4066Sahrens * RETURN: 0 if success 3027fa9e4066Sahrens * EINVAL if new offset invalid 3028fa9e4066Sahrens */ 3029fa9e4066Sahrens /* ARGSUSED */ 3030fa9e4066Sahrens static int 3031fa9e4066Sahrens zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp) 3032fa9e4066Sahrens { 3033fa9e4066Sahrens if (vp->v_type == VDIR) 3034fa9e4066Sahrens return (0); 3035fa9e4066Sahrens return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 3036fa9e4066Sahrens } 3037fa9e4066Sahrens 3038fa9e4066Sahrens /* 3039fa9e4066Sahrens * Pre-filter the generic locking function to trap attempts to place 3040fa9e4066Sahrens * a mandatory lock on a memory mapped file. 3041fa9e4066Sahrens */ 3042fa9e4066Sahrens static int 3043fa9e4066Sahrens zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 3044fa9e4066Sahrens flk_callback_t *flk_cbp, cred_t *cr) 3045fa9e4066Sahrens { 3046fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3047fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3048fa9e4066Sahrens int error; 3049fa9e4066Sahrens 3050fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3051fa9e4066Sahrens 3052fa9e4066Sahrens /* 3053ea8dc4b6Seschrock * We are following the UFS semantics with respect to mapcnt 3054ea8dc4b6Seschrock * here: If we see that the file is mapped already, then we will 3055ea8dc4b6Seschrock * return an error, but we don't worry about races between this 3056ea8dc4b6Seschrock * function and zfs_map(). 3057fa9e4066Sahrens */ 3058ea8dc4b6Seschrock if (zp->z_mapcnt > 0 && MANDMODE((mode_t)zp->z_phys->zp_mode)) { 3059fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3060fa9e4066Sahrens return (EAGAIN); 3061fa9e4066Sahrens } 3062fa9e4066Sahrens error = fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr); 3063fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3064fa9e4066Sahrens return (error); 3065fa9e4066Sahrens } 3066fa9e4066Sahrens 3067fa9e4066Sahrens /* 3068fa9e4066Sahrens * If we can't find a page in the cache, we will create a new page 3069fa9e4066Sahrens * and fill it with file data. For efficiency, we may try to fill 3070104e2ed7Sperrin * multiple pages at once (klustering). 3071fa9e4066Sahrens */ 3072fa9e4066Sahrens static int 3073fa9e4066Sahrens zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 3074fa9e4066Sahrens caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 3075fa9e4066Sahrens { 3076fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3077fa9e4066Sahrens page_t *pp, *cur_pp; 3078fa9e4066Sahrens objset_t *os = zp->z_zfsvfs->z_os; 3079fa9e4066Sahrens caddr_t va; 3080fa9e4066Sahrens u_offset_t io_off, total; 3081fa9e4066Sahrens uint64_t oid = zp->z_id; 3082fa9e4066Sahrens size_t io_len; 3083104e2ed7Sperrin uint64_t filesz; 3084fa9e4066Sahrens int err; 3085fa9e4066Sahrens 3086fa9e4066Sahrens /* 3087fa9e4066Sahrens * If we are only asking for a single page don't bother klustering. 3088fa9e4066Sahrens */ 3089104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 309044eda4d7Smaybee if (off >= filesz) 309144eda4d7Smaybee return (EFAULT); 309244eda4d7Smaybee if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 3093fa9e4066Sahrens io_off = off; 3094fa9e4066Sahrens io_len = PAGESIZE; 3095fa9e4066Sahrens pp = page_create_va(vp, io_off, io_len, PG_WAIT, seg, addr); 3096fa9e4066Sahrens } else { 3097fa9e4066Sahrens /* 3098fa9e4066Sahrens * Try to fill a kluster of pages (a blocks worth). 3099fa9e4066Sahrens */ 3100fa9e4066Sahrens size_t klen; 3101fa9e4066Sahrens u_offset_t koff; 3102fa9e4066Sahrens 3103fa9e4066Sahrens if (!ISP2(zp->z_blksz)) { 3104fa9e4066Sahrens /* Only one block in the file. */ 3105fa9e4066Sahrens klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 3106fa9e4066Sahrens koff = 0; 3107fa9e4066Sahrens } else { 3108574679b5Sgw /* 3109574679b5Sgw * It would be ideal to align our offset to the 3110574679b5Sgw * blocksize but doing so has resulted in some 3111574679b5Sgw * strange application crashes. For now, we 3112574679b5Sgw * leave the offset as is and only adjust the 3113574679b5Sgw * length if we are off the end of the file. 3114574679b5Sgw */ 3115574679b5Sgw koff = off; 3116fa9e4066Sahrens klen = plsz; 3117fa9e4066Sahrens } 3118dd6ef538Smaybee ASSERT(koff <= filesz); 3119dd6ef538Smaybee if (koff + klen > filesz) 3120dd6ef538Smaybee klen = P2ROUNDUP(filesz, (uint64_t)PAGESIZE) - koff; 312144eda4d7Smaybee ASSERT3U(off, >=, koff); 312244eda4d7Smaybee ASSERT3U(off, <, koff + klen); 3123fa9e4066Sahrens pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 3124fa9e4066Sahrens &io_len, koff, klen, 0); 3125fa9e4066Sahrens } 3126fa9e4066Sahrens if (pp == NULL) { 3127fa9e4066Sahrens /* 3128fa9e4066Sahrens * Some other thread entered the page before us. 3129fa9e4066Sahrens * Return to zfs_getpage to retry the lookup. 3130fa9e4066Sahrens */ 3131fa9e4066Sahrens *pl = NULL; 3132fa9e4066Sahrens return (0); 3133fa9e4066Sahrens } 3134fa9e4066Sahrens 3135fa9e4066Sahrens /* 3136fa9e4066Sahrens * Fill the pages in the kluster. 3137fa9e4066Sahrens */ 3138fa9e4066Sahrens cur_pp = pp; 3139fa9e4066Sahrens for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 314044eda4d7Smaybee ASSERT3U(io_off, ==, cur_pp->p_offset); 3141fa9e4066Sahrens va = ppmapin(cur_pp, PROT_READ | PROT_WRITE, (caddr_t)-1); 3142ea8dc4b6Seschrock err = dmu_read(os, oid, io_off, PAGESIZE, va); 3143fa9e4066Sahrens ppmapout(va); 3144fa9e4066Sahrens if (err) { 3145fa9e4066Sahrens /* On error, toss the entire kluster */ 3146fa9e4066Sahrens pvn_read_done(pp, B_ERROR); 3147fa9e4066Sahrens return (err); 3148fa9e4066Sahrens } 3149fa9e4066Sahrens cur_pp = cur_pp->p_next; 3150fa9e4066Sahrens } 3151fa9e4066Sahrens out: 3152fa9e4066Sahrens /* 3153fa9e4066Sahrens * Fill in the page list array from the kluster. If 3154fa9e4066Sahrens * there are too many pages in the kluster, return 3155fa9e4066Sahrens * as many pages as possible starting from the desired 3156fa9e4066Sahrens * offset `off'. 3157fa9e4066Sahrens * NOTE: the page list will always be null terminated. 3158fa9e4066Sahrens */ 3159fa9e4066Sahrens pvn_plist_init(pp, pl, plsz, off, io_len, rw); 3160fa9e4066Sahrens 3161fa9e4066Sahrens return (0); 3162fa9e4066Sahrens } 3163fa9e4066Sahrens 3164fa9e4066Sahrens /* 3165fa9e4066Sahrens * Return pointers to the pages for the file region [off, off + len] 3166fa9e4066Sahrens * in the pl array. If plsz is greater than len, this function may 3167fa9e4066Sahrens * also return page pointers from before or after the specified 3168fa9e4066Sahrens * region (i.e. some region [off', off' + plsz]). These additional 3169fa9e4066Sahrens * pages are only returned if they are already in the cache, or were 3170fa9e4066Sahrens * created as part of a klustered read. 3171fa9e4066Sahrens * 3172fa9e4066Sahrens * IN: vp - vnode of file to get data from. 3173fa9e4066Sahrens * off - position in file to get data from. 3174fa9e4066Sahrens * len - amount of data to retrieve. 3175fa9e4066Sahrens * plsz - length of provided page list. 3176fa9e4066Sahrens * seg - segment to obtain pages for. 3177fa9e4066Sahrens * addr - virtual address of fault. 3178fa9e4066Sahrens * rw - mode of created pages. 3179fa9e4066Sahrens * cr - credentials of caller. 3180fa9e4066Sahrens * 3181fa9e4066Sahrens * OUT: protp - protection mode of created pages. 3182fa9e4066Sahrens * pl - list of pages created. 3183fa9e4066Sahrens * 3184fa9e4066Sahrens * RETURN: 0 if success 3185fa9e4066Sahrens * error code if failure 3186fa9e4066Sahrens * 3187fa9e4066Sahrens * Timestamps: 3188fa9e4066Sahrens * vp - atime updated 3189fa9e4066Sahrens */ 3190fa9e4066Sahrens /* ARGSUSED */ 3191fa9e4066Sahrens static int 3192fa9e4066Sahrens zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 3193fa9e4066Sahrens page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 3194fa9e4066Sahrens enum seg_rw rw, cred_t *cr) 3195fa9e4066Sahrens { 3196fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3197fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3198fa9e4066Sahrens page_t *pp, **pl0 = pl; 3199fe2f476aSperrin int need_unlock = 0, err = 0; 3200fe2f476aSperrin offset_t orig_off; 3201fa9e4066Sahrens 3202fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3203fa9e4066Sahrens 3204fa9e4066Sahrens if (protp) 3205fa9e4066Sahrens *protp = PROT_ALL; 3206fa9e4066Sahrens 3207fa9e4066Sahrens ASSERT(zp->z_dbuf_held && zp->z_phys); 3208fa9e4066Sahrens 3209fa9e4066Sahrens /* no faultahead (for now) */ 3210fa9e4066Sahrens if (pl == NULL) { 3211fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3212fa9e4066Sahrens return (0); 3213fa9e4066Sahrens } 3214fa9e4066Sahrens 3215fa9e4066Sahrens /* can't fault past EOF */ 3216fa9e4066Sahrens if (off >= zp->z_phys->zp_size) { 3217fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3218fa9e4066Sahrens return (EFAULT); 3219fa9e4066Sahrens } 3220fe2f476aSperrin orig_off = off; 3221fa9e4066Sahrens 3222fa9e4066Sahrens /* 3223fa9e4066Sahrens * If we already own the lock, then we must be page faulting 3224fa9e4066Sahrens * in the middle of a write to this file (i.e., we are writing 3225fa9e4066Sahrens * to this file using data from a mapped region of the file). 3226fa9e4066Sahrens */ 3227fe2f476aSperrin if (rw_owner(&zp->z_map_lock) != curthread) { 3228fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 3229fa9e4066Sahrens need_unlock = TRUE; 3230fa9e4066Sahrens } 3231fa9e4066Sahrens 3232fa9e4066Sahrens /* 3233fa9e4066Sahrens * Loop through the requested range [off, off + len] looking 3234fa9e4066Sahrens * for pages. If we don't find a page, we will need to create 3235fa9e4066Sahrens * a new page and fill it with data from the file. 3236fa9e4066Sahrens */ 3237fa9e4066Sahrens while (len > 0) { 3238fa9e4066Sahrens if (plsz < PAGESIZE) 3239fa9e4066Sahrens break; 3240fa9e4066Sahrens if (pp = page_lookup(vp, off, SE_SHARED)) { 3241fa9e4066Sahrens *pl++ = pp; 3242fa9e4066Sahrens off += PAGESIZE; 3243fa9e4066Sahrens addr += PAGESIZE; 3244fa9e4066Sahrens len -= PAGESIZE; 3245fa9e4066Sahrens plsz -= PAGESIZE; 3246fa9e4066Sahrens } else { 3247fa9e4066Sahrens err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw); 3248fe2f476aSperrin if (err) 3249fe2f476aSperrin goto out; 3250fa9e4066Sahrens /* 3251fa9e4066Sahrens * klustering may have changed our region 3252fa9e4066Sahrens * to be block aligned. 3253fa9e4066Sahrens */ 3254fa9e4066Sahrens if (((pp = *pl) != 0) && (off != pp->p_offset)) { 3255fa9e4066Sahrens int delta = off - pp->p_offset; 3256fa9e4066Sahrens len += delta; 3257fa9e4066Sahrens off -= delta; 3258fa9e4066Sahrens addr -= delta; 3259fa9e4066Sahrens } 3260fa9e4066Sahrens while (*pl) { 3261fa9e4066Sahrens pl++; 3262fa9e4066Sahrens off += PAGESIZE; 3263fa9e4066Sahrens addr += PAGESIZE; 3264fa9e4066Sahrens plsz -= PAGESIZE; 3265fa9e4066Sahrens if (len > PAGESIZE) 3266fa9e4066Sahrens len -= PAGESIZE; 3267fa9e4066Sahrens else 3268fa9e4066Sahrens len = 0; 3269fa9e4066Sahrens } 3270fa9e4066Sahrens } 3271fa9e4066Sahrens } 3272fa9e4066Sahrens 3273fa9e4066Sahrens /* 3274fa9e4066Sahrens * Fill out the page array with any pages already in the cache. 3275fa9e4066Sahrens */ 3276fa9e4066Sahrens while (plsz > 0) { 3277fa9e4066Sahrens pp = page_lookup_nowait(vp, off, SE_SHARED); 3278fa9e4066Sahrens if (pp == NULL) 3279fa9e4066Sahrens break; 3280fa9e4066Sahrens *pl++ = pp; 3281fa9e4066Sahrens off += PAGESIZE; 3282fa9e4066Sahrens plsz -= PAGESIZE; 3283fa9e4066Sahrens } 3284fa9e4066Sahrens 3285fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 3286fa9e4066Sahrens out: 3287fe2f476aSperrin /* 3288fe2f476aSperrin * We can't grab the range lock for the page as reader which would 3289fe2f476aSperrin * stop truncation as this leads to deadlock. So we need to recheck 3290fe2f476aSperrin * the file size. 3291fe2f476aSperrin */ 3292fe2f476aSperrin if (orig_off >= zp->z_phys->zp_size) 3293fe2f476aSperrin err = EFAULT; 3294fe2f476aSperrin if (err) { 3295fe2f476aSperrin /* 3296fe2f476aSperrin * Release any pages we have previously locked. 3297fe2f476aSperrin */ 3298fe2f476aSperrin while (pl > pl0) 3299fe2f476aSperrin page_unlock(*--pl); 3300fe2f476aSperrin } 3301fe2f476aSperrin 3302fa9e4066Sahrens *pl = NULL; 3303fa9e4066Sahrens 3304fa9e4066Sahrens if (need_unlock) 3305fa9e4066Sahrens rw_exit(&zp->z_map_lock); 3306fa9e4066Sahrens 3307fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3308fa9e4066Sahrens return (err); 3309fa9e4066Sahrens } 3310fa9e4066Sahrens 3311ea8dc4b6Seschrock /* 3312ea8dc4b6Seschrock * Request a memory map for a section of a file. This code interacts 3313ea8dc4b6Seschrock * with common code and the VM system as follows: 3314ea8dc4b6Seschrock * 3315ea8dc4b6Seschrock * common code calls mmap(), which ends up in smmap_common() 3316ea8dc4b6Seschrock * 3317ea8dc4b6Seschrock * this calls VOP_MAP(), which takes you into (say) zfs 3318ea8dc4b6Seschrock * 3319ea8dc4b6Seschrock * zfs_map() calls as_map(), passing segvn_create() as the callback 3320ea8dc4b6Seschrock * 3321ea8dc4b6Seschrock * segvn_create() creates the new segment and calls VOP_ADDMAP() 3322ea8dc4b6Seschrock * 3323ea8dc4b6Seschrock * zfs_addmap() updates z_mapcnt 3324ea8dc4b6Seschrock */ 3325fa9e4066Sahrens static int 3326fa9e4066Sahrens zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 3327fa9e4066Sahrens size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr) 3328fa9e4066Sahrens { 3329fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3330fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3331fa9e4066Sahrens segvn_crargs_t vn_a; 3332fa9e4066Sahrens int error; 3333fa9e4066Sahrens 3334fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3335fa9e4066Sahrens 3336fa9e4066Sahrens if (vp->v_flag & VNOMAP) { 3337fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3338fa9e4066Sahrens return (ENOSYS); 3339fa9e4066Sahrens } 3340fa9e4066Sahrens 3341fa9e4066Sahrens if (off < 0 || len > MAXOFFSET_T - off) { 3342fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3343fa9e4066Sahrens return (ENXIO); 3344fa9e4066Sahrens } 3345fa9e4066Sahrens 3346fa9e4066Sahrens if (vp->v_type != VREG) { 3347fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3348fa9e4066Sahrens return (ENODEV); 3349fa9e4066Sahrens } 3350fa9e4066Sahrens 3351fa9e4066Sahrens /* 3352fa9e4066Sahrens * If file is locked, disallow mapping. 3353fa9e4066Sahrens */ 3354ea8dc4b6Seschrock if (MANDMODE((mode_t)zp->z_phys->zp_mode) && vn_has_flocks(vp)) { 3355ea8dc4b6Seschrock ZFS_EXIT(zfsvfs); 3356ea8dc4b6Seschrock return (EAGAIN); 3357fa9e4066Sahrens } 3358fa9e4066Sahrens 3359fa9e4066Sahrens as_rangelock(as); 3360fa9e4066Sahrens if ((flags & MAP_FIXED) == 0) { 3361fa9e4066Sahrens map_addr(addrp, len, off, 1, flags); 3362fa9e4066Sahrens if (*addrp == NULL) { 3363fa9e4066Sahrens as_rangeunlock(as); 3364fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3365fa9e4066Sahrens return (ENOMEM); 3366fa9e4066Sahrens } 3367fa9e4066Sahrens } else { 3368fa9e4066Sahrens /* 3369fa9e4066Sahrens * User specified address - blow away any previous mappings 3370fa9e4066Sahrens */ 3371fa9e4066Sahrens (void) as_unmap(as, *addrp, len); 3372fa9e4066Sahrens } 3373fa9e4066Sahrens 3374fa9e4066Sahrens vn_a.vp = vp; 3375fa9e4066Sahrens vn_a.offset = (u_offset_t)off; 3376fa9e4066Sahrens vn_a.type = flags & MAP_TYPE; 3377fa9e4066Sahrens vn_a.prot = prot; 3378fa9e4066Sahrens vn_a.maxprot = maxprot; 3379fa9e4066Sahrens vn_a.cred = cr; 3380fa9e4066Sahrens vn_a.amp = NULL; 3381fa9e4066Sahrens vn_a.flags = flags & ~MAP_TYPE; 33824944b02eSkchow vn_a.szc = 0; 33834944b02eSkchow vn_a.lgrp_mem_policy_flags = 0; 3384fa9e4066Sahrens 3385fa9e4066Sahrens error = as_map(as, *addrp, len, segvn_create, &vn_a); 3386fa9e4066Sahrens 3387fa9e4066Sahrens as_rangeunlock(as); 3388fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3389fa9e4066Sahrens return (error); 3390fa9e4066Sahrens } 3391fa9e4066Sahrens 3392fa9e4066Sahrens /* ARGSUSED */ 3393fa9e4066Sahrens static int 3394fa9e4066Sahrens zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 3395fa9e4066Sahrens size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr) 3396fa9e4066Sahrens { 3397ea8dc4b6Seschrock uint64_t pages = btopr(len); 3398ea8dc4b6Seschrock 3399ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 3400fa9e4066Sahrens return (0); 3401fa9e4066Sahrens } 3402fa9e4066Sahrens 3403b468a217Seschrock /* 3404b468a217Seschrock * The reason we push dirty pages as part of zfs_delmap() is so that we get a 3405b468a217Seschrock * more accurate mtime for the associated file. Since we don't have a way of 3406b468a217Seschrock * detecting when the data was actually modified, we have to resort to 3407b468a217Seschrock * heuristics. If an explicit msync() is done, then we mark the mtime when the 3408b468a217Seschrock * last page is pushed. The problem occurs when the msync() call is omitted, 3409b468a217Seschrock * which by far the most common case: 3410b468a217Seschrock * 3411b468a217Seschrock * open() 3412b468a217Seschrock * mmap() 3413b468a217Seschrock * <modify memory> 3414b468a217Seschrock * munmap() 3415b468a217Seschrock * close() 3416b468a217Seschrock * <time lapse> 3417b468a217Seschrock * putpage() via fsflush 3418b468a217Seschrock * 3419b468a217Seschrock * If we wait until fsflush to come along, we can have a modification time that 3420b468a217Seschrock * is some arbitrary point in the future. In order to prevent this in the 3421b468a217Seschrock * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is 3422b468a217Seschrock * torn down. 3423b468a217Seschrock */ 3424fa9e4066Sahrens /* ARGSUSED */ 3425fa9e4066Sahrens static int 3426fa9e4066Sahrens zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 3427fa9e4066Sahrens size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr) 3428fa9e4066Sahrens { 3429ea8dc4b6Seschrock uint64_t pages = btopr(len); 3430ea8dc4b6Seschrock 3431ea8dc4b6Seschrock ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 3432ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 3433b468a217Seschrock 3434b468a217Seschrock if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && 3435b468a217Seschrock vn_has_cached_data(vp)) 3436b468a217Seschrock (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr); 3437b468a217Seschrock 3438fa9e4066Sahrens return (0); 3439fa9e4066Sahrens } 3440fa9e4066Sahrens 3441fa9e4066Sahrens /* 3442fa9e4066Sahrens * Free or allocate space in a file. Currently, this function only 3443fa9e4066Sahrens * supports the `F_FREESP' command. However, this command is somewhat 3444fa9e4066Sahrens * misnamed, as its functionality includes the ability to allocate as 3445fa9e4066Sahrens * well as free space. 3446fa9e4066Sahrens * 3447fa9e4066Sahrens * IN: vp - vnode of file to free data in. 3448fa9e4066Sahrens * cmd - action to take (only F_FREESP supported). 3449fa9e4066Sahrens * bfp - section of file to free/alloc. 3450fa9e4066Sahrens * flag - current file open mode flags. 3451fa9e4066Sahrens * offset - current file offset. 3452fa9e4066Sahrens * cr - credentials of caller [UNUSED]. 3453fa9e4066Sahrens * 3454fa9e4066Sahrens * RETURN: 0 if success 3455fa9e4066Sahrens * error code if failure 3456fa9e4066Sahrens * 3457fa9e4066Sahrens * Timestamps: 3458fa9e4066Sahrens * vp - ctime|mtime updated 3459fa9e4066Sahrens */ 3460fa9e4066Sahrens /* ARGSUSED */ 3461fa9e4066Sahrens static int 3462fa9e4066Sahrens zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 3463fa9e4066Sahrens offset_t offset, cred_t *cr, caller_context_t *ct) 3464fa9e4066Sahrens { 3465fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3466fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3467fa9e4066Sahrens uint64_t off, len; 3468fa9e4066Sahrens int error; 3469fa9e4066Sahrens 3470fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3471fa9e4066Sahrens 3472fa9e4066Sahrens top: 3473fa9e4066Sahrens if (cmd != F_FREESP) { 3474fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3475fa9e4066Sahrens return (EINVAL); 3476fa9e4066Sahrens } 3477fa9e4066Sahrens 3478fa9e4066Sahrens if (error = convoff(vp, bfp, 0, offset)) { 3479fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3480fa9e4066Sahrens return (error); 3481fa9e4066Sahrens } 3482fa9e4066Sahrens 3483fa9e4066Sahrens if (bfp->l_len < 0) { 3484fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3485fa9e4066Sahrens return (EINVAL); 3486fa9e4066Sahrens } 3487fa9e4066Sahrens 3488fa9e4066Sahrens off = bfp->l_start; 3489104e2ed7Sperrin len = bfp->l_len; /* 0 means from off to end of file */ 3490104e2ed7Sperrin 34915730cc9aSmaybee do { 34925730cc9aSmaybee error = zfs_freesp(zp, off, len, flag, TRUE); 34938a2f1b91Sahrens /* NB: we already did dmu_tx_wait() if necessary */ 34945730cc9aSmaybee } while (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT); 3495fa9e4066Sahrens 3496fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3497fa9e4066Sahrens return (error); 3498fa9e4066Sahrens } 3499fa9e4066Sahrens 3500fa9e4066Sahrens static int 3501fa9e4066Sahrens zfs_fid(vnode_t *vp, fid_t *fidp) 3502fa9e4066Sahrens { 3503fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3504fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3505fa9e4066Sahrens uint32_t gen = (uint32_t)zp->z_phys->zp_gen; 3506fa9e4066Sahrens uint64_t object = zp->z_id; 3507fa9e4066Sahrens zfid_short_t *zfid; 3508fa9e4066Sahrens int size, i; 3509fa9e4066Sahrens 3510fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3511fa9e4066Sahrens 3512fa9e4066Sahrens size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 3513fa9e4066Sahrens if (fidp->fid_len < size) { 3514fa9e4066Sahrens fidp->fid_len = size; 35150f2dc02eSek ZFS_EXIT(zfsvfs); 3516fa9e4066Sahrens return (ENOSPC); 3517fa9e4066Sahrens } 3518fa9e4066Sahrens 3519fa9e4066Sahrens zfid = (zfid_short_t *)fidp; 3520fa9e4066Sahrens 3521fa9e4066Sahrens zfid->zf_len = size; 3522fa9e4066Sahrens 3523fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_object); i++) 3524fa9e4066Sahrens zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 3525fa9e4066Sahrens 3526fa9e4066Sahrens /* Must have a non-zero generation number to distinguish from .zfs */ 3527fa9e4066Sahrens if (gen == 0) 3528fa9e4066Sahrens gen = 1; 3529fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_gen); i++) 3530fa9e4066Sahrens zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 3531fa9e4066Sahrens 3532fa9e4066Sahrens if (size == LONG_FID_LEN) { 3533fa9e4066Sahrens uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 3534fa9e4066Sahrens zfid_long_t *zlfid; 3535fa9e4066Sahrens 3536fa9e4066Sahrens zlfid = (zfid_long_t *)fidp; 3537fa9e4066Sahrens 3538fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setid); i++) 3539fa9e4066Sahrens zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 3540fa9e4066Sahrens 3541fa9e4066Sahrens /* XXX - this should be the generation number for the objset */ 3542fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 3543fa9e4066Sahrens zlfid->zf_setgen[i] = 0; 3544fa9e4066Sahrens } 3545fa9e4066Sahrens 3546fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3547fa9e4066Sahrens return (0); 3548fa9e4066Sahrens } 3549fa9e4066Sahrens 3550fa9e4066Sahrens static int 3551fa9e4066Sahrens zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr) 3552fa9e4066Sahrens { 3553fa9e4066Sahrens znode_t *zp, *xzp; 3554fa9e4066Sahrens zfsvfs_t *zfsvfs; 3555fa9e4066Sahrens zfs_dirlock_t *dl; 3556fa9e4066Sahrens int error; 3557fa9e4066Sahrens 3558fa9e4066Sahrens switch (cmd) { 3559fa9e4066Sahrens case _PC_LINK_MAX: 3560fa9e4066Sahrens *valp = ULONG_MAX; 3561fa9e4066Sahrens return (0); 3562fa9e4066Sahrens 3563fa9e4066Sahrens case _PC_FILESIZEBITS: 3564fa9e4066Sahrens *valp = 64; 3565fa9e4066Sahrens return (0); 3566fa9e4066Sahrens 3567fa9e4066Sahrens case _PC_XATTR_EXISTS: 3568fa9e4066Sahrens zp = VTOZ(vp); 3569fa9e4066Sahrens zfsvfs = zp->z_zfsvfs; 3570fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3571fa9e4066Sahrens *valp = 0; 3572fa9e4066Sahrens error = zfs_dirent_lock(&dl, zp, "", &xzp, 3573fa9e4066Sahrens ZXATTR | ZEXISTS | ZSHARED); 3574fa9e4066Sahrens if (error == 0) { 3575fa9e4066Sahrens zfs_dirent_unlock(dl); 3576fa9e4066Sahrens if (!zfs_dirempty(xzp)) 3577fa9e4066Sahrens *valp = 1; 3578fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 3579fa9e4066Sahrens } else if (error == ENOENT) { 3580fa9e4066Sahrens /* 3581fa9e4066Sahrens * If there aren't extended attributes, it's the 3582fa9e4066Sahrens * same as having zero of them. 3583fa9e4066Sahrens */ 3584fa9e4066Sahrens error = 0; 3585fa9e4066Sahrens } 3586fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3587fa9e4066Sahrens return (error); 3588fa9e4066Sahrens 3589fa9e4066Sahrens case _PC_ACL_ENABLED: 3590fa9e4066Sahrens *valp = _ACL_ACE_ENABLED; 3591fa9e4066Sahrens return (0); 3592fa9e4066Sahrens 3593fa9e4066Sahrens case _PC_MIN_HOLE_SIZE: 3594fa9e4066Sahrens *valp = (ulong_t)SPA_MINBLOCKSIZE; 3595fa9e4066Sahrens return (0); 3596fa9e4066Sahrens 3597fa9e4066Sahrens default: 3598fa9e4066Sahrens return (fs_pathconf(vp, cmd, valp, cr)); 3599fa9e4066Sahrens } 3600fa9e4066Sahrens } 3601fa9e4066Sahrens 3602fa9e4066Sahrens /*ARGSUSED*/ 3603fa9e4066Sahrens static int 3604fa9e4066Sahrens zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr) 3605fa9e4066Sahrens { 3606fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3607fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3608fa9e4066Sahrens int error; 3609fa9e4066Sahrens 3610fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3611fa9e4066Sahrens error = zfs_getacl(zp, vsecp, cr); 3612fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3613fa9e4066Sahrens 3614fa9e4066Sahrens return (error); 3615fa9e4066Sahrens } 3616fa9e4066Sahrens 3617fa9e4066Sahrens /*ARGSUSED*/ 3618fa9e4066Sahrens static int 3619fa9e4066Sahrens zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr) 3620fa9e4066Sahrens { 3621fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3622fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3623fa9e4066Sahrens int error; 3624fa9e4066Sahrens 3625fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3626fa9e4066Sahrens error = zfs_setacl(zp, vsecp, cr); 3627fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3628fa9e4066Sahrens return (error); 3629fa9e4066Sahrens } 3630fa9e4066Sahrens 3631fa9e4066Sahrens /* 3632fa9e4066Sahrens * Predeclare these here so that the compiler assumes that 3633fa9e4066Sahrens * this is an "old style" function declaration that does 3634fa9e4066Sahrens * not include arguments => we won't get type mismatch errors 3635fa9e4066Sahrens * in the initializations that follow. 3636fa9e4066Sahrens */ 3637fa9e4066Sahrens static int zfs_inval(); 3638fa9e4066Sahrens static int zfs_isdir(); 3639fa9e4066Sahrens 3640fa9e4066Sahrens static int 3641fa9e4066Sahrens zfs_inval() 3642fa9e4066Sahrens { 3643fa9e4066Sahrens return (EINVAL); 3644fa9e4066Sahrens } 3645fa9e4066Sahrens 3646fa9e4066Sahrens static int 3647fa9e4066Sahrens zfs_isdir() 3648fa9e4066Sahrens { 3649fa9e4066Sahrens return (EISDIR); 3650fa9e4066Sahrens } 3651fa9e4066Sahrens /* 3652fa9e4066Sahrens * Directory vnode operations template 3653fa9e4066Sahrens */ 3654fa9e4066Sahrens vnodeops_t *zfs_dvnodeops; 3655fa9e4066Sahrens const fs_operation_def_t zfs_dvnodeops_template[] = { 3656fa9e4066Sahrens VOPNAME_OPEN, zfs_open, 3657fa9e4066Sahrens VOPNAME_CLOSE, zfs_close, 3658fa9e4066Sahrens VOPNAME_READ, zfs_isdir, 3659fa9e4066Sahrens VOPNAME_WRITE, zfs_isdir, 3660fa9e4066Sahrens VOPNAME_IOCTL, zfs_ioctl, 3661fa9e4066Sahrens VOPNAME_GETATTR, zfs_getattr, 3662fa9e4066Sahrens VOPNAME_SETATTR, zfs_setattr, 3663fa9e4066Sahrens VOPNAME_ACCESS, zfs_access, 3664fa9e4066Sahrens VOPNAME_LOOKUP, zfs_lookup, 3665fa9e4066Sahrens VOPNAME_CREATE, zfs_create, 3666fa9e4066Sahrens VOPNAME_REMOVE, zfs_remove, 3667fa9e4066Sahrens VOPNAME_LINK, zfs_link, 3668fa9e4066Sahrens VOPNAME_RENAME, zfs_rename, 3669fa9e4066Sahrens VOPNAME_MKDIR, zfs_mkdir, 3670fa9e4066Sahrens VOPNAME_RMDIR, zfs_rmdir, 3671fa9e4066Sahrens VOPNAME_READDIR, zfs_readdir, 3672fa9e4066Sahrens VOPNAME_SYMLINK, zfs_symlink, 3673fa9e4066Sahrens VOPNAME_FSYNC, zfs_fsync, 3674fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p) zfs_inactive, 3675fa9e4066Sahrens VOPNAME_FID, zfs_fid, 3676fa9e4066Sahrens VOPNAME_SEEK, zfs_seek, 3677fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3678fa9e4066Sahrens VOPNAME_GETSECATTR, zfs_getsecattr, 3679fa9e4066Sahrens VOPNAME_SETSECATTR, zfs_setsecattr, 3680fa9e4066Sahrens NULL, NULL 3681fa9e4066Sahrens }; 3682fa9e4066Sahrens 3683fa9e4066Sahrens /* 3684fa9e4066Sahrens * Regular file vnode operations template 3685fa9e4066Sahrens */ 3686fa9e4066Sahrens vnodeops_t *zfs_fvnodeops; 3687fa9e4066Sahrens const fs_operation_def_t zfs_fvnodeops_template[] = { 3688fa9e4066Sahrens VOPNAME_OPEN, zfs_open, 3689fa9e4066Sahrens VOPNAME_CLOSE, zfs_close, 3690fa9e4066Sahrens VOPNAME_READ, zfs_read, 3691fa9e4066Sahrens VOPNAME_WRITE, zfs_write, 3692fa9e4066Sahrens VOPNAME_IOCTL, zfs_ioctl, 3693fa9e4066Sahrens VOPNAME_GETATTR, zfs_getattr, 3694fa9e4066Sahrens VOPNAME_SETATTR, zfs_setattr, 3695fa9e4066Sahrens VOPNAME_ACCESS, zfs_access, 3696fa9e4066Sahrens VOPNAME_LOOKUP, zfs_lookup, 3697fa9e4066Sahrens VOPNAME_RENAME, zfs_rename, 3698fa9e4066Sahrens VOPNAME_FSYNC, zfs_fsync, 3699fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p)zfs_inactive, 3700fa9e4066Sahrens VOPNAME_FID, zfs_fid, 3701fa9e4066Sahrens VOPNAME_SEEK, zfs_seek, 3702fa9e4066Sahrens VOPNAME_FRLOCK, zfs_frlock, 3703fa9e4066Sahrens VOPNAME_SPACE, zfs_space, 3704fa9e4066Sahrens VOPNAME_GETPAGE, zfs_getpage, 3705fa9e4066Sahrens VOPNAME_PUTPAGE, zfs_putpage, 3706fa9e4066Sahrens VOPNAME_MAP, (fs_generic_func_p) zfs_map, 3707fa9e4066Sahrens VOPNAME_ADDMAP, (fs_generic_func_p) zfs_addmap, 3708fa9e4066Sahrens VOPNAME_DELMAP, zfs_delmap, 3709fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3710fa9e4066Sahrens VOPNAME_GETSECATTR, zfs_getsecattr, 3711fa9e4066Sahrens VOPNAME_SETSECATTR, zfs_setsecattr, 3712fa9e4066Sahrens VOPNAME_VNEVENT, fs_vnevent_support, 3713fa9e4066Sahrens NULL, NULL 3714fa9e4066Sahrens }; 3715fa9e4066Sahrens 3716fa9e4066Sahrens /* 3717fa9e4066Sahrens * Symbolic link vnode operations template 3718fa9e4066Sahrens */ 3719fa9e4066Sahrens vnodeops_t *zfs_symvnodeops; 3720fa9e4066Sahrens const fs_operation_def_t zfs_symvnodeops_template[] = { 3721fa9e4066Sahrens VOPNAME_GETATTR, zfs_getattr, 3722fa9e4066Sahrens VOPNAME_SETATTR, zfs_setattr, 3723fa9e4066Sahrens VOPNAME_ACCESS, zfs_access, 3724fa9e4066Sahrens VOPNAME_RENAME, zfs_rename, 3725fa9e4066Sahrens VOPNAME_READLINK, zfs_readlink, 3726fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p) zfs_inactive, 3727fa9e4066Sahrens VOPNAME_FID, zfs_fid, 3728fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3729fa9e4066Sahrens VOPNAME_VNEVENT, fs_vnevent_support, 3730fa9e4066Sahrens NULL, NULL 3731fa9e4066Sahrens }; 3732fa9e4066Sahrens 3733fa9e4066Sahrens /* 3734fa9e4066Sahrens * Extended attribute directory vnode operations template 3735fa9e4066Sahrens * This template is identical to the directory vnodes 3736fa9e4066Sahrens * operation template except for restricted operations: 3737fa9e4066Sahrens * VOP_MKDIR() 3738fa9e4066Sahrens * VOP_SYMLINK() 3739fa9e4066Sahrens * Note that there are other restrictions embedded in: 3740fa9e4066Sahrens * zfs_create() - restrict type to VREG 3741fa9e4066Sahrens * zfs_link() - no links into/out of attribute space 3742fa9e4066Sahrens * zfs_rename() - no moves into/out of attribute space 3743fa9e4066Sahrens */ 3744fa9e4066Sahrens vnodeops_t *zfs_xdvnodeops; 3745fa9e4066Sahrens const fs_operation_def_t zfs_xdvnodeops_template[] = { 3746fa9e4066Sahrens VOPNAME_OPEN, zfs_open, 3747fa9e4066Sahrens VOPNAME_CLOSE, zfs_close, 3748fa9e4066Sahrens VOPNAME_IOCTL, zfs_ioctl, 3749fa9e4066Sahrens VOPNAME_GETATTR, zfs_getattr, 3750fa9e4066Sahrens VOPNAME_SETATTR, zfs_setattr, 3751fa9e4066Sahrens VOPNAME_ACCESS, zfs_access, 3752fa9e4066Sahrens VOPNAME_LOOKUP, zfs_lookup, 3753fa9e4066Sahrens VOPNAME_CREATE, zfs_create, 3754fa9e4066Sahrens VOPNAME_REMOVE, zfs_remove, 3755fa9e4066Sahrens VOPNAME_LINK, zfs_link, 3756fa9e4066Sahrens VOPNAME_RENAME, zfs_rename, 3757fa9e4066Sahrens VOPNAME_MKDIR, zfs_inval, 3758fa9e4066Sahrens VOPNAME_RMDIR, zfs_rmdir, 3759fa9e4066Sahrens VOPNAME_READDIR, zfs_readdir, 3760fa9e4066Sahrens VOPNAME_SYMLINK, zfs_inval, 3761fa9e4066Sahrens VOPNAME_FSYNC, zfs_fsync, 3762fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p) zfs_inactive, 3763fa9e4066Sahrens VOPNAME_FID, zfs_fid, 3764fa9e4066Sahrens VOPNAME_SEEK, zfs_seek, 3765fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3766fa9e4066Sahrens VOPNAME_GETSECATTR, zfs_getsecattr, 3767fa9e4066Sahrens VOPNAME_SETSECATTR, zfs_setsecattr, 3768fa9e4066Sahrens VOPNAME_VNEVENT, fs_vnevent_support, 3769fa9e4066Sahrens NULL, NULL 3770fa9e4066Sahrens }; 3771fa9e4066Sahrens 3772fa9e4066Sahrens /* 3773fa9e4066Sahrens * Error vnode operations template 3774fa9e4066Sahrens */ 3775fa9e4066Sahrens vnodeops_t *zfs_evnodeops; 3776fa9e4066Sahrens const fs_operation_def_t zfs_evnodeops_template[] = { 3777fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p) zfs_inactive, 3778fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3779fa9e4066Sahrens NULL, NULL 3780fa9e4066Sahrens }; 3781