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 2675c76197Speteh /* Portions Copyright 2007 Jeremy Teo */ 2775c76197Speteh 28fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 29fa9e4066Sahrens 30fa9e4066Sahrens #include <sys/types.h> 31fa9e4066Sahrens #include <sys/param.h> 32fa9e4066Sahrens #include <sys/time.h> 33fa9e4066Sahrens #include <sys/systm.h> 34fa9e4066Sahrens #include <sys/sysmacros.h> 35fa9e4066Sahrens #include <sys/resource.h> 36fa9e4066Sahrens #include <sys/vfs.h> 37aa59c4cbSrsb #include <sys/vfs_opreg.h> 38fa9e4066Sahrens #include <sys/vnode.h> 39fa9e4066Sahrens #include <sys/file.h> 40fa9e4066Sahrens #include <sys/stat.h> 41fa9e4066Sahrens #include <sys/kmem.h> 42fa9e4066Sahrens #include <sys/taskq.h> 43fa9e4066Sahrens #include <sys/uio.h> 44fa9e4066Sahrens #include <sys/vmsystm.h> 45fa9e4066Sahrens #include <sys/atomic.h> 4644eda4d7Smaybee #include <sys/vm.h> 47fa9e4066Sahrens #include <vm/seg_vn.h> 48fa9e4066Sahrens #include <vm/pvn.h> 49fa9e4066Sahrens #include <vm/as.h> 50fa9e4066Sahrens #include <sys/mman.h> 51fa9e4066Sahrens #include <sys/pathname.h> 52fa9e4066Sahrens #include <sys/cmn_err.h> 53fa9e4066Sahrens #include <sys/errno.h> 54fa9e4066Sahrens #include <sys/unistd.h> 55fa9e4066Sahrens #include <sys/zfs_vfsops.h> 56fa9e4066Sahrens #include <sys/zfs_dir.h> 57fa9e4066Sahrens #include <sys/zfs_acl.h> 58fa9e4066Sahrens #include <sys/zfs_ioctl.h> 59fa9e4066Sahrens #include <sys/fs/zfs.h> 60fa9e4066Sahrens #include <sys/dmu.h> 61fa9e4066Sahrens #include <sys/spa.h> 62fa9e4066Sahrens #include <sys/txg.h> 63fa9e4066Sahrens #include <sys/dbuf.h> 64fa9e4066Sahrens #include <sys/zap.h> 65fa9e4066Sahrens #include <sys/dirent.h> 66fa9e4066Sahrens #include <sys/policy.h> 67fa9e4066Sahrens #include <sys/sunddi.h> 68fa9e4066Sahrens #include <sys/filio.h> 69fa9e4066Sahrens #include "fs/fs_subr.h" 70fa9e4066Sahrens #include <sys/zfs_ctldir.h> 71033f9833Sek #include <sys/dnlc.h> 72104e2ed7Sperrin #include <sys/zfs_rlock.h> 73fa9e4066Sahrens 74fa9e4066Sahrens /* 75fa9e4066Sahrens * Programming rules. 76fa9e4066Sahrens * 77fa9e4066Sahrens * Each vnode op performs some logical unit of work. To do this, the ZPL must 78fa9e4066Sahrens * properly lock its in-core state, create a DMU transaction, do the work, 79fa9e4066Sahrens * record this work in the intent log (ZIL), commit the DMU transaction, 80fa9e4066Sahrens * and wait the the intent log to commit if it's is a synchronous operation. 81fa9e4066Sahrens * Morover, the vnode ops must work in both normal and log replay context. 82fa9e4066Sahrens * The ordering of events is important to avoid deadlocks and references 83fa9e4066Sahrens * to freed memory. The example below illustrates the following Big Rules: 84fa9e4066Sahrens * 85fa9e4066Sahrens * (1) A check must be made in each zfs thread for a mounted file system. 86fa9e4066Sahrens * This is done avoiding races using ZFS_ENTER(zfsvfs). 87fa9e4066Sahrens * A ZFS_EXIT(zfsvfs) is needed before all returns. 88fa9e4066Sahrens * 89fa9e4066Sahrens * (2) VN_RELE() should always be the last thing except for zil_commit() 90b19a79ecSperrin * (if necessary) and ZFS_EXIT(). This is for 3 reasons: 91fa9e4066Sahrens * First, if it's the last reference, the vnode/znode 92fa9e4066Sahrens * can be freed, so the zp may point to freed memory. Second, the last 93fa9e4066Sahrens * reference will call zfs_zinactive(), which may induce a lot of work -- 94104e2ed7Sperrin * pushing cached pages (which acquires range locks) and syncing out 95fa9e4066Sahrens * cached atime changes. Third, zfs_zinactive() may require a new tx, 96fa9e4066Sahrens * which could deadlock the system if you were already holding one. 97fa9e4066Sahrens * 987885c754Sperrin * (3) All range locks must be grabbed before calling dmu_tx_assign(), 997885c754Sperrin * as they can span dmu_tx_assign() calls. 1007885c754Sperrin * 1017885c754Sperrin * (4) Always pass zfsvfs->z_assign as the second argument to dmu_tx_assign(). 102fa9e4066Sahrens * In normal operation, this will be TXG_NOWAIT. During ZIL replay, 103fa9e4066Sahrens * it will be a specific txg. Either way, dmu_tx_assign() never blocks. 104fa9e4066Sahrens * This is critical because we don't want to block while holding locks. 105fa9e4066Sahrens * Note, in particular, that if a lock is sometimes acquired before 106fa9e4066Sahrens * the tx assigns, and sometimes after (e.g. z_lock), then failing to 107fa9e4066Sahrens * use a non-blocking assign can deadlock the system. The scenario: 108fa9e4066Sahrens * 109fa9e4066Sahrens * Thread A has grabbed a lock before calling dmu_tx_assign(). 110fa9e4066Sahrens * Thread B is in an already-assigned tx, and blocks for this lock. 111fa9e4066Sahrens * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 112fa9e4066Sahrens * forever, because the previous txg can't quiesce until B's tx commits. 113fa9e4066Sahrens * 114fa9e4066Sahrens * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 1158a2f1b91Sahrens * then drop all locks, call dmu_tx_wait(), and try again. 116fa9e4066Sahrens * 1177885c754Sperrin * (5) If the operation succeeded, generate the intent log entry for it 118fa9e4066Sahrens * before dropping locks. This ensures that the ordering of events 119fa9e4066Sahrens * in the intent log matches the order in which they actually occurred. 120fa9e4066Sahrens * 1217885c754Sperrin * (6) At the end of each vnode op, the DMU tx must always commit, 122fa9e4066Sahrens * regardless of whether there were any errors. 123fa9e4066Sahrens * 124b19a79ecSperrin * (7) After dropping all locks, invoke zil_commit(zilog, seq, foid) 125fa9e4066Sahrens * to ensure that synchronous semantics are provided when necessary. 126fa9e4066Sahrens * 127fa9e4066Sahrens * In general, this is how things should be ordered in each vnode op: 128fa9e4066Sahrens * 129fa9e4066Sahrens * ZFS_ENTER(zfsvfs); // exit if unmounted 130fa9e4066Sahrens * top: 131fa9e4066Sahrens * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 132fa9e4066Sahrens * rw_enter(...); // grab any other locks you need 133fa9e4066Sahrens * tx = dmu_tx_create(...); // get DMU tx 134fa9e4066Sahrens * dmu_tx_hold_*(); // hold each object you might modify 135fa9e4066Sahrens * error = dmu_tx_assign(tx, zfsvfs->z_assign); // try to assign 136fa9e4066Sahrens * if (error) { 137fa9e4066Sahrens * rw_exit(...); // drop locks 138fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 139fa9e4066Sahrens * VN_RELE(...); // release held vnodes 140fa9e4066Sahrens * if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 1418a2f1b91Sahrens * dmu_tx_wait(tx); 1428a2f1b91Sahrens * dmu_tx_abort(tx); 143fa9e4066Sahrens * goto top; 144fa9e4066Sahrens * } 1458a2f1b91Sahrens * dmu_tx_abort(tx); // abort DMU tx 146fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 147fa9e4066Sahrens * return (error); // really out of space 148fa9e4066Sahrens * } 149fa9e4066Sahrens * error = do_real_work(); // do whatever this VOP does 150fa9e4066Sahrens * if (error == 0) 151b19a79ecSperrin * zfs_log_*(...); // on success, make ZIL entry 152fa9e4066Sahrens * dmu_tx_commit(tx); // commit DMU tx -- error or not 153fa9e4066Sahrens * rw_exit(...); // drop locks 154fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 155fa9e4066Sahrens * VN_RELE(...); // release held vnodes 156b19a79ecSperrin * zil_commit(zilog, seq, foid); // synchronous when necessary 157fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 158fa9e4066Sahrens * return (error); // done, report error 159fa9e4066Sahrens */ 160fa9e4066Sahrens /* ARGSUSED */ 161fa9e4066Sahrens static int 162fa9e4066Sahrens zfs_open(vnode_t **vpp, int flag, cred_t *cr) 163fa9e4066Sahrens { 16467bd71c6Sperrin znode_t *zp = VTOZ(*vpp); 16567bd71c6Sperrin 16667bd71c6Sperrin /* Keep a count of the synchronous opens in the znode */ 16767bd71c6Sperrin if (flag & (FSYNC | FDSYNC)) 16867bd71c6Sperrin atomic_inc_32(&zp->z_sync_cnt); 169fa9e4066Sahrens return (0); 170fa9e4066Sahrens } 171fa9e4066Sahrens 172fa9e4066Sahrens /* ARGSUSED */ 173fa9e4066Sahrens static int 174fa9e4066Sahrens zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr) 175fa9e4066Sahrens { 17667bd71c6Sperrin znode_t *zp = VTOZ(vp); 17767bd71c6Sperrin 17867bd71c6Sperrin /* Decrement the synchronous opens in the znode */ 179*ecb72030Sperrin if ((flag & (FSYNC | FDSYNC)) && (count == 1)) 18067bd71c6Sperrin atomic_dec_32(&zp->z_sync_cnt); 18167bd71c6Sperrin 182fa9e4066Sahrens /* 183fa9e4066Sahrens * Clean up any locks held by this process on the vp. 184fa9e4066Sahrens */ 185fa9e4066Sahrens cleanlocks(vp, ddi_get_pid(), 0); 186fa9e4066Sahrens cleanshares(vp, ddi_get_pid()); 187fa9e4066Sahrens 188fa9e4066Sahrens return (0); 189fa9e4066Sahrens } 190fa9e4066Sahrens 191fa9e4066Sahrens /* 192fa9e4066Sahrens * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 193fa9e4066Sahrens * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 194fa9e4066Sahrens */ 195fa9e4066Sahrens static int 196fa9e4066Sahrens zfs_holey(vnode_t *vp, int cmd, offset_t *off) 197fa9e4066Sahrens { 198fa9e4066Sahrens znode_t *zp = VTOZ(vp); 199fa9e4066Sahrens uint64_t noff = (uint64_t)*off; /* new offset */ 200fa9e4066Sahrens uint64_t file_sz; 201fa9e4066Sahrens int error; 202fa9e4066Sahrens boolean_t hole; 203fa9e4066Sahrens 204fa9e4066Sahrens file_sz = zp->z_phys->zp_size; 205fa9e4066Sahrens if (noff >= file_sz) { 206fa9e4066Sahrens return (ENXIO); 207fa9e4066Sahrens } 208fa9e4066Sahrens 209fa9e4066Sahrens if (cmd == _FIO_SEEK_HOLE) 210fa9e4066Sahrens hole = B_TRUE; 211fa9e4066Sahrens else 212fa9e4066Sahrens hole = B_FALSE; 213fa9e4066Sahrens 214fa9e4066Sahrens error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 215fa9e4066Sahrens 216fa9e4066Sahrens /* end of file? */ 217fa9e4066Sahrens if ((error == ESRCH) || (noff > file_sz)) { 218fa9e4066Sahrens /* 219fa9e4066Sahrens * Handle the virtual hole at the end of file. 220fa9e4066Sahrens */ 221fa9e4066Sahrens if (hole) { 222fa9e4066Sahrens *off = file_sz; 223fa9e4066Sahrens return (0); 224fa9e4066Sahrens } 225fa9e4066Sahrens return (ENXIO); 226fa9e4066Sahrens } 227fa9e4066Sahrens 228fa9e4066Sahrens if (noff < *off) 229fa9e4066Sahrens return (error); 230fa9e4066Sahrens *off = noff; 231fa9e4066Sahrens return (error); 232fa9e4066Sahrens } 233fa9e4066Sahrens 234fa9e4066Sahrens /* ARGSUSED */ 235fa9e4066Sahrens static int 236fa9e4066Sahrens zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred, 237fa9e4066Sahrens int *rvalp) 238fa9e4066Sahrens { 239fa9e4066Sahrens offset_t off; 240fa9e4066Sahrens int error; 241fa9e4066Sahrens zfsvfs_t *zfsvfs; 242fa9e4066Sahrens 243fa9e4066Sahrens switch (com) { 244*ecb72030Sperrin case _FIOFFS: 245fa9e4066Sahrens return (zfs_sync(vp->v_vfsp, 0, cred)); 246fa9e4066Sahrens 247ea8dc4b6Seschrock /* 248ea8dc4b6Seschrock * The following two ioctls are used by bfu. Faking out, 249ea8dc4b6Seschrock * necessary to avoid bfu errors. 250ea8dc4b6Seschrock */ 251*ecb72030Sperrin case _FIOGDIO: 252*ecb72030Sperrin case _FIOSDIO: 253ea8dc4b6Seschrock return (0); 254ea8dc4b6Seschrock 255*ecb72030Sperrin case _FIO_SEEK_DATA: 256*ecb72030Sperrin case _FIO_SEEK_HOLE: 257fa9e4066Sahrens if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 258fa9e4066Sahrens return (EFAULT); 259fa9e4066Sahrens 260fa9e4066Sahrens zfsvfs = VTOZ(vp)->z_zfsvfs; 261fa9e4066Sahrens ZFS_ENTER(zfsvfs); 262fa9e4066Sahrens 263fa9e4066Sahrens /* offset parameter is in/out */ 264fa9e4066Sahrens error = zfs_holey(vp, com, &off); 265fa9e4066Sahrens ZFS_EXIT(zfsvfs); 266fa9e4066Sahrens if (error) 267fa9e4066Sahrens return (error); 268fa9e4066Sahrens if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 269fa9e4066Sahrens return (EFAULT); 270fa9e4066Sahrens return (0); 271fa9e4066Sahrens } 272fa9e4066Sahrens return (ENOTTY); 273fa9e4066Sahrens } 274fa9e4066Sahrens 275fa9e4066Sahrens /* 276fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 277fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 278fa9e4066Sahrens * 279fa9e4066Sahrens * On Write: If we find a memory mapped page, we write to *both* 280fa9e4066Sahrens * the page and the dmu buffer. 281fa9e4066Sahrens * 282fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 283fa9e4066Sahrens * the file is memory mapped. 284fa9e4066Sahrens */ 285fa9e4066Sahrens static int 286feb08c6bSbillm mappedwrite(vnode_t *vp, int nbytes, uio_t *uio, dmu_tx_t *tx) 287fa9e4066Sahrens { 288fa9e4066Sahrens znode_t *zp = VTOZ(vp); 289fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 290fa9e4066Sahrens int64_t start, off; 291fa9e4066Sahrens int len = nbytes; 292fa9e4066Sahrens int error = 0; 293fa9e4066Sahrens 294fa9e4066Sahrens start = uio->uio_loffset; 295fa9e4066Sahrens off = start & PAGEOFFSET; 296fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 297fa9e4066Sahrens page_t *pp; 298fa9e4066Sahrens uint64_t bytes = MIN(PAGESIZE - off, len); 299feb08c6bSbillm uint64_t woff = uio->uio_loffset; 300fa9e4066Sahrens 301fa9e4066Sahrens /* 302fa9e4066Sahrens * We don't want a new page to "appear" in the middle of 303fa9e4066Sahrens * the file update (because it may not get the write 304fa9e4066Sahrens * update data), so we grab a lock to block 305fa9e4066Sahrens * zfs_getpage(). 306fa9e4066Sahrens */ 307fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 308fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 309fa9e4066Sahrens caddr_t va; 310fa9e4066Sahrens 311fa9e4066Sahrens rw_exit(&zp->z_map_lock); 312fa9e4066Sahrens va = ppmapin(pp, PROT_READ | PROT_WRITE, (caddr_t)-1L); 313fa9e4066Sahrens error = uiomove(va+off, bytes, UIO_WRITE, uio); 314fa9e4066Sahrens if (error == 0) { 315fa9e4066Sahrens dmu_write(zfsvfs->z_os, zp->z_id, 316fa9e4066Sahrens woff, bytes, va+off, tx); 317fa9e4066Sahrens } 318fa9e4066Sahrens ppmapout(va); 319fa9e4066Sahrens page_unlock(pp); 320fa9e4066Sahrens } else { 321fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 322feb08c6bSbillm uio, bytes, tx); 323fa9e4066Sahrens rw_exit(&zp->z_map_lock); 324fa9e4066Sahrens } 325fa9e4066Sahrens len -= bytes; 326fa9e4066Sahrens off = 0; 327fa9e4066Sahrens if (error) 328fa9e4066Sahrens break; 329fa9e4066Sahrens } 330fa9e4066Sahrens return (error); 331fa9e4066Sahrens } 332fa9e4066Sahrens 333fa9e4066Sahrens /* 334fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 335fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 336fa9e4066Sahrens * 337fa9e4066Sahrens * On Read: We "read" preferentially from memory mapped pages, 338fa9e4066Sahrens * else we default from the dmu buffer. 339fa9e4066Sahrens * 340fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 341fa9e4066Sahrens * the file is memory mapped. 342fa9e4066Sahrens */ 343fa9e4066Sahrens static int 344feb08c6bSbillm mappedread(vnode_t *vp, int nbytes, uio_t *uio) 345fa9e4066Sahrens { 346feb08c6bSbillm znode_t *zp = VTOZ(vp); 347feb08c6bSbillm objset_t *os = zp->z_zfsvfs->z_os; 348feb08c6bSbillm int64_t start, off; 349fa9e4066Sahrens int len = nbytes; 350fa9e4066Sahrens int error = 0; 351fa9e4066Sahrens 352fa9e4066Sahrens start = uio->uio_loffset; 353fa9e4066Sahrens off = start & PAGEOFFSET; 354fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 355fa9e4066Sahrens page_t *pp; 356feb08c6bSbillm uint64_t bytes = MIN(PAGESIZE - off, len); 357fa9e4066Sahrens 358fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 359fa9e4066Sahrens caddr_t va; 360fa9e4066Sahrens 36144eda4d7Smaybee va = ppmapin(pp, PROT_READ, (caddr_t)-1L); 362fa9e4066Sahrens error = uiomove(va + off, bytes, UIO_READ, uio); 363fa9e4066Sahrens ppmapout(va); 364fa9e4066Sahrens page_unlock(pp); 365fa9e4066Sahrens } else { 366feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, bytes); 367fa9e4066Sahrens } 368fa9e4066Sahrens len -= bytes; 369fa9e4066Sahrens off = 0; 370fa9e4066Sahrens if (error) 371fa9e4066Sahrens break; 372fa9e4066Sahrens } 373fa9e4066Sahrens return (error); 374fa9e4066Sahrens } 375fa9e4066Sahrens 376feb08c6bSbillm offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 377fa9e4066Sahrens 378fa9e4066Sahrens /* 379fa9e4066Sahrens * Read bytes from specified file into supplied buffer. 380fa9e4066Sahrens * 381fa9e4066Sahrens * IN: vp - vnode of file to be read from. 382fa9e4066Sahrens * uio - structure supplying read location, range info, 383fa9e4066Sahrens * and return buffer. 384fa9e4066Sahrens * ioflag - SYNC flags; used to provide FRSYNC semantics. 385fa9e4066Sahrens * cr - credentials of caller. 386fa9e4066Sahrens * 387fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 388fa9e4066Sahrens * 389fa9e4066Sahrens * RETURN: 0 if success 390fa9e4066Sahrens * error code if failure 391fa9e4066Sahrens * 392fa9e4066Sahrens * Side Effects: 393fa9e4066Sahrens * vp - atime updated if byte count > 0 394fa9e4066Sahrens */ 395fa9e4066Sahrens /* ARGSUSED */ 396fa9e4066Sahrens static int 397fa9e4066Sahrens zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 398fa9e4066Sahrens { 399fa9e4066Sahrens znode_t *zp = VTOZ(vp); 400fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 401feb08c6bSbillm objset_t *os = zfsvfs->z_os; 402feb08c6bSbillm ssize_t n, nbytes; 403feb08c6bSbillm int error; 404104e2ed7Sperrin rl_t *rl; 405fa9e4066Sahrens 406fa9e4066Sahrens ZFS_ENTER(zfsvfs); 407fa9e4066Sahrens 408fa9e4066Sahrens /* 409fa9e4066Sahrens * Validate file offset 410fa9e4066Sahrens */ 411fa9e4066Sahrens if (uio->uio_loffset < (offset_t)0) { 412fa9e4066Sahrens ZFS_EXIT(zfsvfs); 413fa9e4066Sahrens return (EINVAL); 414fa9e4066Sahrens } 415fa9e4066Sahrens 416fa9e4066Sahrens /* 417fa9e4066Sahrens * Fasttrack empty reads 418fa9e4066Sahrens */ 419fa9e4066Sahrens if (uio->uio_resid == 0) { 420fa9e4066Sahrens ZFS_EXIT(zfsvfs); 421fa9e4066Sahrens return (0); 422fa9e4066Sahrens } 423fa9e4066Sahrens 424fa9e4066Sahrens /* 425104e2ed7Sperrin * Check for mandatory locks 426fa9e4066Sahrens */ 427fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode)) { 428fa9e4066Sahrens if (error = chklock(vp, FREAD, 429fa9e4066Sahrens uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 430fa9e4066Sahrens ZFS_EXIT(zfsvfs); 431fa9e4066Sahrens return (error); 432fa9e4066Sahrens } 433fa9e4066Sahrens } 434fa9e4066Sahrens 435fa9e4066Sahrens /* 436fa9e4066Sahrens * If we're in FRSYNC mode, sync out this znode before reading it. 437fa9e4066Sahrens */ 438b19a79ecSperrin if (ioflag & FRSYNC) 439b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 440fa9e4066Sahrens 441fa9e4066Sahrens /* 442104e2ed7Sperrin * Lock the range against changes. 443fa9e4066Sahrens */ 444104e2ed7Sperrin rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER); 445104e2ed7Sperrin 446fa9e4066Sahrens /* 447fa9e4066Sahrens * If we are reading past end-of-file we can skip 448fa9e4066Sahrens * to the end; but we might still need to set atime. 449fa9e4066Sahrens */ 450fa9e4066Sahrens if (uio->uio_loffset >= zp->z_phys->zp_size) { 451fa9e4066Sahrens error = 0; 452fa9e4066Sahrens goto out; 453fa9e4066Sahrens } 454fa9e4066Sahrens 455feb08c6bSbillm ASSERT(uio->uio_loffset < zp->z_phys->zp_size); 456feb08c6bSbillm n = MIN(uio->uio_resid, zp->z_phys->zp_size - uio->uio_loffset); 457feb08c6bSbillm 458feb08c6bSbillm while (n > 0) { 459feb08c6bSbillm nbytes = MIN(n, zfs_read_chunk_size - 460feb08c6bSbillm P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); 461fa9e4066Sahrens 462feb08c6bSbillm if (vn_has_cached_data(vp)) 463feb08c6bSbillm error = mappedread(vp, nbytes, uio); 464feb08c6bSbillm else 465feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, nbytes); 466ea8dc4b6Seschrock if (error) 467feb08c6bSbillm break; 468fa9e4066Sahrens 469feb08c6bSbillm n -= nbytes; 470fa9e4066Sahrens } 471feb08c6bSbillm 472fa9e4066Sahrens out: 473c5c6ffa0Smaybee zfs_range_unlock(rl); 474fa9e4066Sahrens 475fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 476fa9e4066Sahrens ZFS_EXIT(zfsvfs); 477fa9e4066Sahrens return (error); 478fa9e4066Sahrens } 479fa9e4066Sahrens 480fa9e4066Sahrens /* 481fa9e4066Sahrens * Fault in the pages of the first n bytes specified by the uio structure. 482fa9e4066Sahrens * 1 byte in each page is touched and the uio struct is unmodified. 483fa9e4066Sahrens * Any error will exit this routine as this is only a best 484fa9e4066Sahrens * attempt to get the pages resident. This is a copy of ufs_trans_touch(). 485fa9e4066Sahrens */ 486fa9e4066Sahrens static void 487fa9e4066Sahrens zfs_prefault_write(ssize_t n, struct uio *uio) 488fa9e4066Sahrens { 489fa9e4066Sahrens struct iovec *iov; 490fa9e4066Sahrens ulong_t cnt, incr; 491fa9e4066Sahrens caddr_t p; 492fa9e4066Sahrens uint8_t tmp; 493fa9e4066Sahrens 494fa9e4066Sahrens iov = uio->uio_iov; 495fa9e4066Sahrens 496fa9e4066Sahrens while (n) { 497fa9e4066Sahrens cnt = MIN(iov->iov_len, n); 498fa9e4066Sahrens if (cnt == 0) { 499fa9e4066Sahrens /* empty iov entry */ 500fa9e4066Sahrens iov++; 501fa9e4066Sahrens continue; 502fa9e4066Sahrens } 503fa9e4066Sahrens n -= cnt; 504fa9e4066Sahrens /* 505fa9e4066Sahrens * touch each page in this segment. 506fa9e4066Sahrens */ 507fa9e4066Sahrens p = iov->iov_base; 508fa9e4066Sahrens while (cnt) { 509fa9e4066Sahrens switch (uio->uio_segflg) { 510fa9e4066Sahrens case UIO_USERSPACE: 511fa9e4066Sahrens case UIO_USERISPACE: 512fa9e4066Sahrens if (fuword8(p, &tmp)) 513fa9e4066Sahrens return; 514fa9e4066Sahrens break; 515fa9e4066Sahrens case UIO_SYSSPACE: 516fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 517fa9e4066Sahrens return; 518fa9e4066Sahrens break; 519fa9e4066Sahrens } 520fa9e4066Sahrens incr = MIN(cnt, PAGESIZE); 521fa9e4066Sahrens p += incr; 522fa9e4066Sahrens cnt -= incr; 523fa9e4066Sahrens } 524fa9e4066Sahrens /* 525fa9e4066Sahrens * touch the last byte in case it straddles a page. 526fa9e4066Sahrens */ 527fa9e4066Sahrens p--; 528fa9e4066Sahrens switch (uio->uio_segflg) { 529fa9e4066Sahrens case UIO_USERSPACE: 530fa9e4066Sahrens case UIO_USERISPACE: 531fa9e4066Sahrens if (fuword8(p, &tmp)) 532fa9e4066Sahrens return; 533fa9e4066Sahrens break; 534fa9e4066Sahrens case UIO_SYSSPACE: 535fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 536fa9e4066Sahrens return; 537fa9e4066Sahrens break; 538fa9e4066Sahrens } 539fa9e4066Sahrens iov++; 540fa9e4066Sahrens } 541fa9e4066Sahrens } 542fa9e4066Sahrens 543fa9e4066Sahrens /* 544fa9e4066Sahrens * Write the bytes to a file. 545fa9e4066Sahrens * 546fa9e4066Sahrens * IN: vp - vnode of file to be written to. 547fa9e4066Sahrens * uio - structure supplying write location, range info, 548fa9e4066Sahrens * and data buffer. 549fa9e4066Sahrens * ioflag - FAPPEND flag set if in append mode. 550fa9e4066Sahrens * cr - credentials of caller. 551fa9e4066Sahrens * 552fa9e4066Sahrens * OUT: uio - updated offset and range. 553fa9e4066Sahrens * 554fa9e4066Sahrens * RETURN: 0 if success 555fa9e4066Sahrens * error code if failure 556fa9e4066Sahrens * 557fa9e4066Sahrens * Timestamps: 558fa9e4066Sahrens * vp - ctime|mtime updated if byte count > 0 559fa9e4066Sahrens */ 560fa9e4066Sahrens /* ARGSUSED */ 561fa9e4066Sahrens static int 562fa9e4066Sahrens zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 563fa9e4066Sahrens { 564fa9e4066Sahrens znode_t *zp = VTOZ(vp); 565fa9e4066Sahrens rlim64_t limit = uio->uio_llimit; 566fa9e4066Sahrens ssize_t start_resid = uio->uio_resid; 567fa9e4066Sahrens ssize_t tx_bytes; 568fa9e4066Sahrens uint64_t end_size; 569fa9e4066Sahrens dmu_tx_t *tx; 570fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 571fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 572fa9e4066Sahrens offset_t woff; 573fa9e4066Sahrens ssize_t n, nbytes; 574104e2ed7Sperrin rl_t *rl; 575fa9e4066Sahrens int max_blksz = zfsvfs->z_max_blksz; 576104e2ed7Sperrin int error; 577fa9e4066Sahrens 578fa9e4066Sahrens /* 579fa9e4066Sahrens * Fasttrack empty write 580fa9e4066Sahrens */ 581104e2ed7Sperrin n = start_resid; 582fa9e4066Sahrens if (n == 0) 583fa9e4066Sahrens return (0); 584fa9e4066Sahrens 585104e2ed7Sperrin if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 586104e2ed7Sperrin limit = MAXOFFSET_T; 587104e2ed7Sperrin 588fa9e4066Sahrens ZFS_ENTER(zfsvfs); 589fa9e4066Sahrens 590fa9e4066Sahrens /* 591c5c6ffa0Smaybee * Pre-fault the pages to ensure slow (eg NFS) pages 592104e2ed7Sperrin * don't hold up txg. 593fa9e4066Sahrens */ 594c5c6ffa0Smaybee zfs_prefault_write(n, uio); 595fa9e4066Sahrens 596fa9e4066Sahrens /* 597fa9e4066Sahrens * If in append mode, set the io offset pointer to eof. 598fa9e4066Sahrens */ 599104e2ed7Sperrin if (ioflag & FAPPEND) { 600104e2ed7Sperrin /* 601104e2ed7Sperrin * Range lock for a file append: 602104e2ed7Sperrin * The value for the start of range will be determined by 603104e2ed7Sperrin * zfs_range_lock() (to guarantee append semantics). 604104e2ed7Sperrin * If this write will cause the block size to increase, 605104e2ed7Sperrin * zfs_range_lock() will lock the entire file, so we must 606104e2ed7Sperrin * later reduce the range after we grow the block size. 607104e2ed7Sperrin */ 608104e2ed7Sperrin rl = zfs_range_lock(zp, 0, n, RL_APPEND); 609104e2ed7Sperrin if (rl->r_len == UINT64_MAX) { 610104e2ed7Sperrin /* overlocked, zp_size can't change */ 611104e2ed7Sperrin woff = uio->uio_loffset = zp->z_phys->zp_size; 612104e2ed7Sperrin } else { 613104e2ed7Sperrin woff = uio->uio_loffset = rl->r_off; 614104e2ed7Sperrin } 615fa9e4066Sahrens } else { 616fa9e4066Sahrens woff = uio->uio_loffset; 617fa9e4066Sahrens /* 618fa9e4066Sahrens * Validate file offset 619fa9e4066Sahrens */ 620fa9e4066Sahrens if (woff < 0) { 621fa9e4066Sahrens ZFS_EXIT(zfsvfs); 622fa9e4066Sahrens return (EINVAL); 623fa9e4066Sahrens } 624fa9e4066Sahrens 625fa9e4066Sahrens /* 626104e2ed7Sperrin * If we need to grow the block size then zfs_range_lock() 627104e2ed7Sperrin * will lock a wider range than we request here. 628104e2ed7Sperrin * Later after growing the block size we reduce the range. 629fa9e4066Sahrens */ 630104e2ed7Sperrin rl = zfs_range_lock(zp, woff, n, RL_WRITER); 631fa9e4066Sahrens } 632fa9e4066Sahrens 633fa9e4066Sahrens if (woff >= limit) { 634feb08c6bSbillm zfs_range_unlock(rl); 635feb08c6bSbillm ZFS_EXIT(zfsvfs); 636feb08c6bSbillm return (EFBIG); 637fa9e4066Sahrens } 638fa9e4066Sahrens 639fa9e4066Sahrens if ((woff + n) > limit || woff > (limit - n)) 640fa9e4066Sahrens n = limit - woff; 641fa9e4066Sahrens 642fa9e4066Sahrens /* 643104e2ed7Sperrin * Check for mandatory locks 644fa9e4066Sahrens */ 645fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode) && 646feb08c6bSbillm (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 647feb08c6bSbillm zfs_range_unlock(rl); 648feb08c6bSbillm ZFS_EXIT(zfsvfs); 649feb08c6bSbillm return (error); 650fa9e4066Sahrens } 651feb08c6bSbillm end_size = MAX(zp->z_phys->zp_size, woff + n); 652fa9e4066Sahrens 653104e2ed7Sperrin /* 654feb08c6bSbillm * Write the file in reasonable size chunks. Each chunk is written 655feb08c6bSbillm * in a separate transaction; this keeps the intent log records small 656feb08c6bSbillm * and allows us to do more fine-grained space accounting. 657104e2ed7Sperrin */ 658feb08c6bSbillm while (n > 0) { 659feb08c6bSbillm /* 660feb08c6bSbillm * Start a transaction. 661feb08c6bSbillm */ 662feb08c6bSbillm woff = uio->uio_loffset; 663feb08c6bSbillm tx = dmu_tx_create(zfsvfs->z_os); 664feb08c6bSbillm dmu_tx_hold_bonus(tx, zp->z_id); 665feb08c6bSbillm dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 666feb08c6bSbillm error = dmu_tx_assign(tx, zfsvfs->z_assign); 667feb08c6bSbillm if (error) { 668feb08c6bSbillm if (error == ERESTART && 669feb08c6bSbillm zfsvfs->z_assign == TXG_NOWAIT) { 670feb08c6bSbillm dmu_tx_wait(tx); 671feb08c6bSbillm dmu_tx_abort(tx); 672feb08c6bSbillm continue; 673feb08c6bSbillm } 674feb08c6bSbillm dmu_tx_abort(tx); 675feb08c6bSbillm break; 676feb08c6bSbillm } 677104e2ed7Sperrin 678feb08c6bSbillm /* 679feb08c6bSbillm * If zfs_range_lock() over-locked we grow the blocksize 680feb08c6bSbillm * and then reduce the lock range. This will only happen 681feb08c6bSbillm * on the first iteration since zfs_range_reduce() will 682feb08c6bSbillm * shrink down r_len to the appropriate size. 683feb08c6bSbillm */ 684feb08c6bSbillm if (rl->r_len == UINT64_MAX) { 685feb08c6bSbillm uint64_t new_blksz; 686feb08c6bSbillm 687feb08c6bSbillm if (zp->z_blksz > max_blksz) { 688feb08c6bSbillm ASSERT(!ISP2(zp->z_blksz)); 689feb08c6bSbillm new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 690feb08c6bSbillm } else { 691feb08c6bSbillm new_blksz = MIN(end_size, max_blksz); 692feb08c6bSbillm } 693feb08c6bSbillm zfs_grow_blocksize(zp, new_blksz, tx); 694feb08c6bSbillm zfs_range_reduce(rl, woff, n); 695fa9e4066Sahrens } 696fa9e4066Sahrens 697fa9e4066Sahrens /* 698fa9e4066Sahrens * XXX - should we really limit each write to z_max_blksz? 699fa9e4066Sahrens * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 700fa9e4066Sahrens */ 701fa9e4066Sahrens nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 702fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_READER); 703fa9e4066Sahrens 704fa9e4066Sahrens tx_bytes = uio->uio_resid; 705fa9e4066Sahrens if (vn_has_cached_data(vp)) { 706fa9e4066Sahrens rw_exit(&zp->z_map_lock); 707feb08c6bSbillm error = mappedwrite(vp, nbytes, uio, tx); 708fa9e4066Sahrens } else { 709fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 710feb08c6bSbillm uio, nbytes, tx); 711fa9e4066Sahrens rw_exit(&zp->z_map_lock); 712fa9e4066Sahrens } 713fa9e4066Sahrens tx_bytes -= uio->uio_resid; 714fa9e4066Sahrens 715feb08c6bSbillm /* 716feb08c6bSbillm * If we made no progress, we're done. If we made even 717feb08c6bSbillm * partial progress, update the znode and ZIL accordingly. 718feb08c6bSbillm */ 719feb08c6bSbillm if (tx_bytes == 0) { 720af2c4821Smaybee dmu_tx_commit(tx); 721feb08c6bSbillm ASSERT(error != 0); 722fa9e4066Sahrens break; 723fa9e4066Sahrens } 724fa9e4066Sahrens 725169cdae2Smarks /* 726169cdae2Smarks * Clear Set-UID/Set-GID bits on successful write if not 727169cdae2Smarks * privileged and at least one of the excute bits is set. 728169cdae2Smarks * 729169cdae2Smarks * It would be nice to to this after all writes have 730169cdae2Smarks * been done, but that would still expose the ISUID/ISGID 731169cdae2Smarks * to another app after the partial write is committed. 732169cdae2Smarks */ 733169cdae2Smarks mutex_enter(&zp->z_acl_lock); 734169cdae2Smarks if ((zp->z_phys->zp_mode & (S_IXUSR | (S_IXUSR >> 3) | 735169cdae2Smarks (S_IXUSR >> 6))) != 0 && 736169cdae2Smarks (zp->z_phys->zp_mode & (S_ISUID | S_ISGID)) != 0 && 737169cdae2Smarks secpolicy_vnode_setid_retain(cr, 738169cdae2Smarks (zp->z_phys->zp_mode & S_ISUID) != 0 && 739169cdae2Smarks zp->z_phys->zp_uid == 0) != 0) { 740*ecb72030Sperrin zp->z_phys->zp_mode &= ~(S_ISUID | S_ISGID); 741169cdae2Smarks } 742169cdae2Smarks mutex_exit(&zp->z_acl_lock); 743169cdae2Smarks 744fa9e4066Sahrens /* 745feb08c6bSbillm * Update time stamp. NOTE: This marks the bonus buffer as 746feb08c6bSbillm * dirty, so we don't have to do it again for zp_size. 747fa9e4066Sahrens */ 748fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 749fa9e4066Sahrens 750fa9e4066Sahrens /* 751feb08c6bSbillm * Update the file size (zp_size) if it has changed; 752feb08c6bSbillm * account for possible concurrent updates. 753fa9e4066Sahrens */ 754feb08c6bSbillm while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) 755fa9e4066Sahrens (void) atomic_cas_64(&zp->z_phys->zp_size, end_size, 756fa9e4066Sahrens uio->uio_loffset); 757feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 758feb08c6bSbillm dmu_tx_commit(tx); 759fa9e4066Sahrens 760feb08c6bSbillm if (error != 0) 761feb08c6bSbillm break; 762feb08c6bSbillm ASSERT(tx_bytes == nbytes); 763feb08c6bSbillm n -= nbytes; 764feb08c6bSbillm } 765fa9e4066Sahrens 766c5c6ffa0Smaybee zfs_range_unlock(rl); 767fa9e4066Sahrens 768fa9e4066Sahrens /* 769fa9e4066Sahrens * If we're in replay mode, or we made no progress, return error. 770fa9e4066Sahrens * Otherwise, it's at least a partial write, so it's successful. 771fa9e4066Sahrens */ 772fa9e4066Sahrens if (zfsvfs->z_assign >= TXG_INITIAL || uio->uio_resid == start_resid) { 773fa9e4066Sahrens ZFS_EXIT(zfsvfs); 774fa9e4066Sahrens return (error); 775fa9e4066Sahrens } 776fa9e4066Sahrens 777b19a79ecSperrin if (ioflag & (FSYNC | FDSYNC)) 778b19a79ecSperrin zil_commit(zilog, zp->z_last_itx, zp->z_id); 779fa9e4066Sahrens 780fa9e4066Sahrens ZFS_EXIT(zfsvfs); 781fa9e4066Sahrens return (0); 782fa9e4066Sahrens } 783fa9e4066Sahrens 784c5c6ffa0Smaybee void 78567bd71c6Sperrin zfs_get_done(dmu_buf_t *db, void *vzgd) 786c5c6ffa0Smaybee { 78767bd71c6Sperrin zgd_t *zgd = (zgd_t *)vzgd; 78867bd71c6Sperrin rl_t *rl = zgd->zgd_rl; 789c5c6ffa0Smaybee vnode_t *vp = ZTOV(rl->r_zp); 790c5c6ffa0Smaybee 79167bd71c6Sperrin dmu_buf_rele(db, vzgd); 792c5c6ffa0Smaybee zfs_range_unlock(rl); 793c5c6ffa0Smaybee VN_RELE(vp); 79467bd71c6Sperrin zil_add_vdev(zgd->zgd_zilog, DVA_GET_VDEV(BP_IDENTITY(zgd->zgd_bp))); 79567bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 796c5c6ffa0Smaybee } 797c5c6ffa0Smaybee 798fa9e4066Sahrens /* 799fa9e4066Sahrens * Get data to generate a TX_WRITE intent log record. 800fa9e4066Sahrens */ 801fa9e4066Sahrens int 802c5c6ffa0Smaybee zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) 803fa9e4066Sahrens { 804fa9e4066Sahrens zfsvfs_t *zfsvfs = arg; 805fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 806fa9e4066Sahrens znode_t *zp; 807fa9e4066Sahrens uint64_t off = lr->lr_offset; 808c5c6ffa0Smaybee dmu_buf_t *db; 809104e2ed7Sperrin rl_t *rl; 81067bd71c6Sperrin zgd_t *zgd; 811feb08c6bSbillm int dlen = lr->lr_length; /* length of user data */ 812fa9e4066Sahrens int error = 0; 813fa9e4066Sahrens 81467bd71c6Sperrin ASSERT(zio); 815fa9e4066Sahrens ASSERT(dlen != 0); 816fa9e4066Sahrens 817fa9e4066Sahrens /* 818104e2ed7Sperrin * Nothing to do if the file has been removed 819fa9e4066Sahrens */ 820fa9e4066Sahrens if (zfs_zget(zfsvfs, lr->lr_foid, &zp) != 0) 821fa9e4066Sahrens return (ENOENT); 822893a6d32Sahrens if (zp->z_unlinked) { 823fa9e4066Sahrens VN_RELE(ZTOV(zp)); 824fa9e4066Sahrens return (ENOENT); 825fa9e4066Sahrens } 826fa9e4066Sahrens 827fa9e4066Sahrens /* 828fa9e4066Sahrens * Write records come in two flavors: immediate and indirect. 829fa9e4066Sahrens * For small writes it's cheaper to store the data with the 830fa9e4066Sahrens * log record (immediate); for large writes it's cheaper to 831fa9e4066Sahrens * sync the data and get a pointer to it (indirect) so that 832fa9e4066Sahrens * we don't have to write the data twice. 833fa9e4066Sahrens */ 834104e2ed7Sperrin if (buf != NULL) { /* immediate write */ 835104e2ed7Sperrin rl = zfs_range_lock(zp, off, dlen, RL_READER); 836104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 837104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 838104e2ed7Sperrin error = ENOENT; 839104e2ed7Sperrin goto out; 840104e2ed7Sperrin } 84110d957caSmaybee VERIFY(0 == dmu_read(os, lr->lr_foid, off, dlen, buf)); 842104e2ed7Sperrin } else { /* indirect write */ 843104e2ed7Sperrin uint64_t boff; /* block starting offset */ 844104e2ed7Sperrin 845fa9e4066Sahrens /* 846104e2ed7Sperrin * Have to lock the whole block to ensure when it's 847104e2ed7Sperrin * written out and it's checksum is being calculated 848104e2ed7Sperrin * that no one can change the data. We need to re-check 849104e2ed7Sperrin * blocksize after we get the lock in case it's changed! 850fa9e4066Sahrens */ 851104e2ed7Sperrin for (;;) { 8525263255cSperrin if (ISP2(zp->z_blksz)) { 8535263255cSperrin boff = P2ALIGN_TYPED(off, zp->z_blksz, 8545263255cSperrin uint64_t); 8555263255cSperrin } else { 8565263255cSperrin boff = 0; 8575263255cSperrin } 858104e2ed7Sperrin dlen = zp->z_blksz; 859104e2ed7Sperrin rl = zfs_range_lock(zp, boff, dlen, RL_READER); 860104e2ed7Sperrin if (zp->z_blksz == dlen) 861104e2ed7Sperrin break; 862c5c6ffa0Smaybee zfs_range_unlock(rl); 863104e2ed7Sperrin } 864104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 865104e2ed7Sperrin if (off >= zp->z_phys->zp_size) { 866104e2ed7Sperrin error = ENOENT; 867104e2ed7Sperrin goto out; 868104e2ed7Sperrin } 86967bd71c6Sperrin zgd = (zgd_t *)kmem_alloc(sizeof (zgd_t), KM_SLEEP); 87067bd71c6Sperrin zgd->zgd_rl = rl; 87167bd71c6Sperrin zgd->zgd_zilog = zfsvfs->z_log; 87267bd71c6Sperrin zgd->zgd_bp = &lr->lr_blkptr; 87367bd71c6Sperrin VERIFY(0 == dmu_buf_hold(os, lr->lr_foid, boff, zgd, &db)); 874c5c6ffa0Smaybee ASSERT(boff == db->db_offset); 875c5c6ffa0Smaybee lr->lr_blkoff = off - boff; 876c5c6ffa0Smaybee error = dmu_sync(zio, db, &lr->lr_blkptr, 87767bd71c6Sperrin lr->lr_common.lrc_txg, zfs_get_done, zgd); 878af2c4821Smaybee ASSERT(error == EEXIST || lr->lr_length <= zp->z_blksz); 87967bd71c6Sperrin if (error == 0) { 88067bd71c6Sperrin zil_add_vdev(zfsvfs->z_log, 88167bd71c6Sperrin DVA_GET_VDEV(BP_IDENTITY(&lr->lr_blkptr))); 88267bd71c6Sperrin } 883c5c6ffa0Smaybee /* 884c5c6ffa0Smaybee * If we get EINPROGRESS, then we need to wait for a 885c5c6ffa0Smaybee * write IO initiated by dmu_sync() to complete before 886b19a79ecSperrin * we can release this dbuf. We will finish everything 887c5c6ffa0Smaybee * up in the zfs_get_done() callback. 888c5c6ffa0Smaybee */ 889c5c6ffa0Smaybee if (error == EINPROGRESS) 890c5c6ffa0Smaybee return (0); 89167bd71c6Sperrin dmu_buf_rele(db, zgd); 89267bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 893fa9e4066Sahrens } 894104e2ed7Sperrin out: 895c5c6ffa0Smaybee zfs_range_unlock(rl); 896fa9e4066Sahrens VN_RELE(ZTOV(zp)); 897fa9e4066Sahrens return (error); 898fa9e4066Sahrens } 899fa9e4066Sahrens 900fa9e4066Sahrens /*ARGSUSED*/ 901fa9e4066Sahrens static int 902fa9e4066Sahrens zfs_access(vnode_t *vp, int mode, int flags, cred_t *cr) 903fa9e4066Sahrens { 904fa9e4066Sahrens znode_t *zp = VTOZ(vp); 905fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 906fa9e4066Sahrens int error; 907fa9e4066Sahrens 908fa9e4066Sahrens ZFS_ENTER(zfsvfs); 909fa9e4066Sahrens error = zfs_zaccess_rwx(zp, mode, cr); 910fa9e4066Sahrens ZFS_EXIT(zfsvfs); 911fa9e4066Sahrens return (error); 912fa9e4066Sahrens } 913fa9e4066Sahrens 914fa9e4066Sahrens /* 915fa9e4066Sahrens * Lookup an entry in a directory, or an extended attribute directory. 916fa9e4066Sahrens * If it exists, return a held vnode reference for it. 917fa9e4066Sahrens * 918fa9e4066Sahrens * IN: dvp - vnode of directory to search. 919fa9e4066Sahrens * nm - name of entry to lookup. 920fa9e4066Sahrens * pnp - full pathname to lookup [UNUSED]. 921fa9e4066Sahrens * flags - LOOKUP_XATTR set if looking for an attribute. 922fa9e4066Sahrens * rdir - root directory vnode [UNUSED]. 923fa9e4066Sahrens * cr - credentials of caller. 924fa9e4066Sahrens * 925fa9e4066Sahrens * OUT: vpp - vnode of located entry, NULL if not found. 926fa9e4066Sahrens * 927fa9e4066Sahrens * RETURN: 0 if success 928fa9e4066Sahrens * error code if failure 929fa9e4066Sahrens * 930fa9e4066Sahrens * Timestamps: 931fa9e4066Sahrens * NA 932fa9e4066Sahrens */ 933fa9e4066Sahrens /* ARGSUSED */ 934fa9e4066Sahrens static int 935fa9e4066Sahrens zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 936fa9e4066Sahrens int flags, vnode_t *rdir, cred_t *cr) 937fa9e4066Sahrens { 938fa9e4066Sahrens 939fa9e4066Sahrens znode_t *zdp = VTOZ(dvp); 940fa9e4066Sahrens zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 941fa9e4066Sahrens int error; 942fa9e4066Sahrens 943fa9e4066Sahrens ZFS_ENTER(zfsvfs); 944fa9e4066Sahrens 945fa9e4066Sahrens *vpp = NULL; 946fa9e4066Sahrens 947fa9e4066Sahrens if (flags & LOOKUP_XATTR) { 9487b55fa8eSck /* 9497b55fa8eSck * If the xattr property is off, refuse the lookup request. 9507b55fa8eSck */ 9517b55fa8eSck if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 9527b55fa8eSck ZFS_EXIT(zfsvfs); 9537b55fa8eSck return (EINVAL); 9547b55fa8eSck } 9557b55fa8eSck 956fa9e4066Sahrens /* 957fa9e4066Sahrens * We don't allow recursive attributes.. 958fa9e4066Sahrens * Maybe someday we will. 959fa9e4066Sahrens */ 960fa9e4066Sahrens if (zdp->z_phys->zp_flags & ZFS_XATTR) { 961fa9e4066Sahrens ZFS_EXIT(zfsvfs); 962fa9e4066Sahrens return (EINVAL); 963fa9e4066Sahrens } 964fa9e4066Sahrens 9653f063a9dSck if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 966fa9e4066Sahrens ZFS_EXIT(zfsvfs); 967fa9e4066Sahrens return (error); 968fa9e4066Sahrens } 969fa9e4066Sahrens 970fa9e4066Sahrens /* 971fa9e4066Sahrens * Do we have permission to get into attribute directory? 972fa9e4066Sahrens */ 973fa9e4066Sahrens 974fa9e4066Sahrens if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, cr)) { 975fa9e4066Sahrens VN_RELE(*vpp); 976fa9e4066Sahrens } 977fa9e4066Sahrens 978fa9e4066Sahrens ZFS_EXIT(zfsvfs); 979fa9e4066Sahrens return (error); 980fa9e4066Sahrens } 981fa9e4066Sahrens 9820f2dc02eSek if (dvp->v_type != VDIR) { 9830f2dc02eSek ZFS_EXIT(zfsvfs); 984736b9155Smarks return (ENOTDIR); 9850f2dc02eSek } 986736b9155Smarks 987fa9e4066Sahrens /* 988fa9e4066Sahrens * Check accessibility of directory. 989fa9e4066Sahrens */ 990fa9e4066Sahrens 991fa9e4066Sahrens if (error = zfs_zaccess(zdp, ACE_EXECUTE, cr)) { 992fa9e4066Sahrens ZFS_EXIT(zfsvfs); 993fa9e4066Sahrens return (error); 994fa9e4066Sahrens } 995fa9e4066Sahrens 996fa9e4066Sahrens if ((error = zfs_dirlook(zdp, nm, vpp)) == 0) { 997fa9e4066Sahrens 998fa9e4066Sahrens /* 999fa9e4066Sahrens * Convert device special files 1000fa9e4066Sahrens */ 1001fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1002fa9e4066Sahrens vnode_t *svp; 1003fa9e4066Sahrens 1004fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1005fa9e4066Sahrens VN_RELE(*vpp); 1006fa9e4066Sahrens if (svp == NULL) 1007fa9e4066Sahrens error = ENOSYS; 1008fa9e4066Sahrens else 1009fa9e4066Sahrens *vpp = svp; 1010fa9e4066Sahrens } 1011fa9e4066Sahrens } 1012fa9e4066Sahrens 1013fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1014fa9e4066Sahrens return (error); 1015fa9e4066Sahrens } 1016fa9e4066Sahrens 1017fa9e4066Sahrens /* 1018fa9e4066Sahrens * Attempt to create a new entry in a directory. If the entry 1019fa9e4066Sahrens * already exists, truncate the file if permissible, else return 1020fa9e4066Sahrens * an error. Return the vp of the created or trunc'd file. 1021fa9e4066Sahrens * 1022fa9e4066Sahrens * IN: dvp - vnode of directory to put new file entry in. 1023fa9e4066Sahrens * name - name of new file entry. 1024fa9e4066Sahrens * vap - attributes of new file. 1025fa9e4066Sahrens * excl - flag indicating exclusive or non-exclusive mode. 1026fa9e4066Sahrens * mode - mode to open file with. 1027fa9e4066Sahrens * cr - credentials of caller. 1028fa9e4066Sahrens * flag - large file flag [UNUSED]. 1029fa9e4066Sahrens * 1030fa9e4066Sahrens * OUT: vpp - vnode of created or trunc'd entry. 1031fa9e4066Sahrens * 1032fa9e4066Sahrens * RETURN: 0 if success 1033fa9e4066Sahrens * error code if failure 1034fa9e4066Sahrens * 1035fa9e4066Sahrens * Timestamps: 1036fa9e4066Sahrens * dvp - ctime|mtime updated if new entry created 1037fa9e4066Sahrens * vp - ctime|mtime always, atime if new 1038fa9e4066Sahrens */ 1039fa9e4066Sahrens /* ARGSUSED */ 1040fa9e4066Sahrens static int 1041fa9e4066Sahrens zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, 1042fa9e4066Sahrens int mode, vnode_t **vpp, cred_t *cr, int flag) 1043fa9e4066Sahrens { 1044fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1045fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1046fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1047fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 1048fa9e4066Sahrens zfs_dirlock_t *dl; 1049fa9e4066Sahrens dmu_tx_t *tx; 1050fa9e4066Sahrens int error; 1051fa9e4066Sahrens uint64_t zoid; 1052fa9e4066Sahrens 1053fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1054fa9e4066Sahrens 1055fa9e4066Sahrens top: 1056fa9e4066Sahrens *vpp = NULL; 1057fa9e4066Sahrens 1058fa9e4066Sahrens if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) 1059fa9e4066Sahrens vap->va_mode &= ~VSVTX; 1060fa9e4066Sahrens 1061fa9e4066Sahrens if (*name == '\0') { 1062fa9e4066Sahrens /* 1063fa9e4066Sahrens * Null component name refers to the directory itself. 1064fa9e4066Sahrens */ 1065fa9e4066Sahrens VN_HOLD(dvp); 1066fa9e4066Sahrens zp = dzp; 1067fa9e4066Sahrens dl = NULL; 1068fa9e4066Sahrens error = 0; 1069fa9e4066Sahrens } else { 1070fa9e4066Sahrens /* possible VN_HOLD(zp) */ 1071fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, 0)) { 1072fa9e4066Sahrens if (strcmp(name, "..") == 0) 1073fa9e4066Sahrens error = EISDIR; 1074fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1075fa9e4066Sahrens return (error); 1076fa9e4066Sahrens } 1077fa9e4066Sahrens } 1078fa9e4066Sahrens 1079fa9e4066Sahrens zoid = zp ? zp->z_id : -1ULL; 1080fa9e4066Sahrens 1081fa9e4066Sahrens if (zp == NULL) { 1082fa9e4066Sahrens /* 1083fa9e4066Sahrens * Create a new file object and update the directory 1084fa9e4066Sahrens * to reference it. 1085fa9e4066Sahrens */ 1086fa9e4066Sahrens if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { 1087fa9e4066Sahrens goto out; 1088fa9e4066Sahrens } 1089fa9e4066Sahrens 1090fa9e4066Sahrens /* 1091fa9e4066Sahrens * We only support the creation of regular files in 1092fa9e4066Sahrens * extended attribute directories. 1093fa9e4066Sahrens */ 1094fa9e4066Sahrens if ((dzp->z_phys->zp_flags & ZFS_XATTR) && 1095fa9e4066Sahrens (vap->va_type != VREG)) { 1096fa9e4066Sahrens error = EINVAL; 1097fa9e4066Sahrens goto out; 1098fa9e4066Sahrens } 1099fa9e4066Sahrens 1100fa9e4066Sahrens tx = dmu_tx_create(os); 1101fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 1102fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 1103ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 1104fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 1105fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1106fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1107fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1108fa9e4066Sahrens if (error) { 1109fa9e4066Sahrens zfs_dirent_unlock(dl); 1110fa9e4066Sahrens if (error == ERESTART && 1111fa9e4066Sahrens zfsvfs->z_assign == TXG_NOWAIT) { 11128a2f1b91Sahrens dmu_tx_wait(tx); 11138a2f1b91Sahrens dmu_tx_abort(tx); 1114fa9e4066Sahrens goto top; 1115fa9e4066Sahrens } 11168a2f1b91Sahrens dmu_tx_abort(tx); 1117fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1118fa9e4066Sahrens return (error); 1119fa9e4066Sahrens } 1120fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); 1121fa9e4066Sahrens ASSERT(zp->z_id == zoid); 1122fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1123b19a79ecSperrin zfs_log_create(zilog, tx, TX_CREATE, dzp, zp, name); 1124fa9e4066Sahrens dmu_tx_commit(tx); 1125fa9e4066Sahrens } else { 1126fa9e4066Sahrens /* 1127fa9e4066Sahrens * A directory entry already exists for this name. 1128fa9e4066Sahrens */ 1129fa9e4066Sahrens /* 1130fa9e4066Sahrens * Can't truncate an existing file if in exclusive mode. 1131fa9e4066Sahrens */ 1132fa9e4066Sahrens if (excl == EXCL) { 1133fa9e4066Sahrens error = EEXIST; 1134fa9e4066Sahrens goto out; 1135fa9e4066Sahrens } 1136fa9e4066Sahrens /* 1137fa9e4066Sahrens * Can't open a directory for writing. 1138fa9e4066Sahrens */ 1139fa9e4066Sahrens if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1140fa9e4066Sahrens error = EISDIR; 1141fa9e4066Sahrens goto out; 1142fa9e4066Sahrens } 1143fa9e4066Sahrens /* 1144fa9e4066Sahrens * Verify requested access to file. 1145fa9e4066Sahrens */ 1146fa9e4066Sahrens if (mode && (error = zfs_zaccess_rwx(zp, mode, cr))) { 1147fa9e4066Sahrens goto out; 1148fa9e4066Sahrens } 1149fa9e4066Sahrens 1150fa9e4066Sahrens mutex_enter(&dzp->z_lock); 1151fa9e4066Sahrens dzp->z_seq++; 1152fa9e4066Sahrens mutex_exit(&dzp->z_lock); 1153fa9e4066Sahrens 11545730cc9aSmaybee /* 11555730cc9aSmaybee * Truncate regular files if requested. 11565730cc9aSmaybee */ 11575730cc9aSmaybee if ((ZTOV(zp)->v_type == VREG) && 1158fa9e4066Sahrens (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 11595730cc9aSmaybee error = zfs_freesp(zp, 0, 0, mode, TRUE); 11605730cc9aSmaybee if (error == ERESTART && 11615730cc9aSmaybee zfsvfs->z_assign == TXG_NOWAIT) { 11628a2f1b91Sahrens /* NB: we already did dmu_tx_wait() */ 11635730cc9aSmaybee zfs_dirent_unlock(dl); 11648991ab5bSperrin VN_RELE(ZTOV(zp)); 11655730cc9aSmaybee goto top; 1166fa9e4066Sahrens } 1167fa9e4066Sahrens } 1168fa9e4066Sahrens } 1169fa9e4066Sahrens out: 1170fa9e4066Sahrens 1171fa9e4066Sahrens if (dl) 1172fa9e4066Sahrens zfs_dirent_unlock(dl); 1173fa9e4066Sahrens 1174fa9e4066Sahrens if (error) { 1175fa9e4066Sahrens if (zp) 1176fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1177fa9e4066Sahrens } else { 1178fa9e4066Sahrens *vpp = ZTOV(zp); 1179fa9e4066Sahrens /* 1180fa9e4066Sahrens * If vnode is for a device return a specfs vnode instead. 1181fa9e4066Sahrens */ 1182fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1183fa9e4066Sahrens struct vnode *svp; 1184fa9e4066Sahrens 1185fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1186fa9e4066Sahrens VN_RELE(*vpp); 1187fa9e4066Sahrens if (svp == NULL) { 1188fa9e4066Sahrens error = ENOSYS; 1189fa9e4066Sahrens } 1190fa9e4066Sahrens *vpp = svp; 1191fa9e4066Sahrens } 1192fa9e4066Sahrens } 1193fa9e4066Sahrens 1194fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1195fa9e4066Sahrens return (error); 1196fa9e4066Sahrens } 1197fa9e4066Sahrens 1198fa9e4066Sahrens /* 1199fa9e4066Sahrens * Remove an entry from a directory. 1200fa9e4066Sahrens * 1201fa9e4066Sahrens * IN: dvp - vnode of directory to remove entry from. 1202fa9e4066Sahrens * name - name of entry to remove. 1203fa9e4066Sahrens * cr - credentials of caller. 1204fa9e4066Sahrens * 1205fa9e4066Sahrens * RETURN: 0 if success 1206fa9e4066Sahrens * error code if failure 1207fa9e4066Sahrens * 1208fa9e4066Sahrens * Timestamps: 1209fa9e4066Sahrens * dvp - ctime|mtime 1210fa9e4066Sahrens * vp - ctime (if nlink > 0) 1211fa9e4066Sahrens */ 1212fa9e4066Sahrens static int 1213fa9e4066Sahrens zfs_remove(vnode_t *dvp, char *name, cred_t *cr) 1214fa9e4066Sahrens { 1215fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1216fa9e4066Sahrens znode_t *xzp = NULL; 1217fa9e4066Sahrens vnode_t *vp; 1218fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1219fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1220fa9e4066Sahrens uint64_t acl_obj, xattr_obj; 1221fa9e4066Sahrens zfs_dirlock_t *dl; 1222fa9e4066Sahrens dmu_tx_t *tx; 1223893a6d32Sahrens boolean_t may_delete_now, delete_now = FALSE; 1224893a6d32Sahrens boolean_t unlinked; 1225fa9e4066Sahrens int error; 1226fa9e4066Sahrens 1227fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1228fa9e4066Sahrens 1229fa9e4066Sahrens top: 1230fa9e4066Sahrens /* 1231fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1232fa9e4066Sahrens */ 1233fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZEXISTS)) { 1234fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1235fa9e4066Sahrens return (error); 1236fa9e4066Sahrens } 1237fa9e4066Sahrens 1238fa9e4066Sahrens vp = ZTOV(zp); 1239fa9e4066Sahrens 1240fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1241fa9e4066Sahrens goto out; 1242fa9e4066Sahrens } 1243fa9e4066Sahrens 1244fa9e4066Sahrens /* 1245fa9e4066Sahrens * Need to use rmdir for removing directories. 1246fa9e4066Sahrens */ 1247fa9e4066Sahrens if (vp->v_type == VDIR) { 1248fa9e4066Sahrens error = EPERM; 1249fa9e4066Sahrens goto out; 1250fa9e4066Sahrens } 1251fa9e4066Sahrens 1252fa9e4066Sahrens vnevent_remove(vp); 1253fa9e4066Sahrens 1254033f9833Sek dnlc_remove(dvp, name); 1255033f9833Sek 1256fa9e4066Sahrens mutex_enter(&vp->v_lock); 1257fa9e4066Sahrens may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1258fa9e4066Sahrens mutex_exit(&vp->v_lock); 1259fa9e4066Sahrens 1260fa9e4066Sahrens /* 1261893a6d32Sahrens * We may delete the znode now, or we may put it in the unlinked set; 1262fa9e4066Sahrens * it depends on whether we're the last link, and on whether there are 1263fa9e4066Sahrens * other holds on the vnode. So we dmu_tx_hold() the right things to 1264fa9e4066Sahrens * allow for either case. 1265fa9e4066Sahrens */ 1266fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1267ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1268fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1269fa9e4066Sahrens if (may_delete_now) 1270fa9e4066Sahrens dmu_tx_hold_free(tx, zp->z_id, 0, DMU_OBJECT_END); 1271fa9e4066Sahrens 1272fa9e4066Sahrens /* are there any extended attributes? */ 1273fa9e4066Sahrens if ((xattr_obj = zp->z_phys->zp_xattr) != 0) { 1274fa9e4066Sahrens /* XXX - do we need this if we are deleting? */ 1275fa9e4066Sahrens dmu_tx_hold_bonus(tx, xattr_obj); 1276fa9e4066Sahrens } 1277fa9e4066Sahrens 1278fa9e4066Sahrens /* are there any additional acls */ 1279fa9e4066Sahrens if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 && 1280fa9e4066Sahrens may_delete_now) 1281fa9e4066Sahrens dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1282fa9e4066Sahrens 1283fa9e4066Sahrens /* charge as an update -- would be nice not to charge at all */ 1284893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1285fa9e4066Sahrens 1286fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1287fa9e4066Sahrens if (error) { 1288fa9e4066Sahrens zfs_dirent_unlock(dl); 1289fa9e4066Sahrens VN_RELE(vp); 1290fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 12918a2f1b91Sahrens dmu_tx_wait(tx); 12928a2f1b91Sahrens dmu_tx_abort(tx); 1293fa9e4066Sahrens goto top; 1294fa9e4066Sahrens } 12958a2f1b91Sahrens dmu_tx_abort(tx); 1296fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1297fa9e4066Sahrens return (error); 1298fa9e4066Sahrens } 1299fa9e4066Sahrens 1300fa9e4066Sahrens /* 1301fa9e4066Sahrens * Remove the directory entry. 1302fa9e4066Sahrens */ 1303893a6d32Sahrens error = zfs_link_destroy(dl, zp, tx, 0, &unlinked); 1304fa9e4066Sahrens 1305fa9e4066Sahrens if (error) { 1306fa9e4066Sahrens dmu_tx_commit(tx); 1307fa9e4066Sahrens goto out; 1308fa9e4066Sahrens } 1309fa9e4066Sahrens 1310893a6d32Sahrens if (unlinked) { 1311fa9e4066Sahrens mutex_enter(&vp->v_lock); 1312fa9e4066Sahrens delete_now = may_delete_now && 1313fa9e4066Sahrens vp->v_count == 1 && !vn_has_cached_data(vp) && 1314fa9e4066Sahrens zp->z_phys->zp_xattr == xattr_obj && 1315fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj; 1316fa9e4066Sahrens mutex_exit(&vp->v_lock); 1317fa9e4066Sahrens } 1318fa9e4066Sahrens 1319fa9e4066Sahrens if (delete_now) { 1320fa9e4066Sahrens if (zp->z_phys->zp_xattr) { 1321fa9e4066Sahrens error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp); 1322fa9e4066Sahrens ASSERT3U(error, ==, 0); 1323fa9e4066Sahrens ASSERT3U(xzp->z_phys->zp_links, ==, 2); 1324fa9e4066Sahrens dmu_buf_will_dirty(xzp->z_dbuf, tx); 1325fa9e4066Sahrens mutex_enter(&xzp->z_lock); 1326893a6d32Sahrens xzp->z_unlinked = 1; 1327fa9e4066Sahrens xzp->z_phys->zp_links = 0; 1328fa9e4066Sahrens mutex_exit(&xzp->z_lock); 1329893a6d32Sahrens zfs_unlinked_add(xzp, tx); 1330fa9e4066Sahrens zp->z_phys->zp_xattr = 0; /* probably unnecessary */ 1331fa9e4066Sahrens } 1332fa9e4066Sahrens mutex_enter(&zp->z_lock); 1333fa9e4066Sahrens mutex_enter(&vp->v_lock); 1334fa9e4066Sahrens vp->v_count--; 1335fa9e4066Sahrens ASSERT3U(vp->v_count, ==, 0); 1336fa9e4066Sahrens mutex_exit(&vp->v_lock); 1337fa9e4066Sahrens mutex_exit(&zp->z_lock); 1338fa9e4066Sahrens zfs_znode_delete(zp, tx); 1339fa9e4066Sahrens VFS_RELE(zfsvfs->z_vfs); 1340893a6d32Sahrens } else if (unlinked) { 1341893a6d32Sahrens zfs_unlinked_add(zp, tx); 1342fa9e4066Sahrens } 1343fa9e4066Sahrens 1344b19a79ecSperrin zfs_log_remove(zilog, tx, TX_REMOVE, dzp, name); 1345fa9e4066Sahrens 1346fa9e4066Sahrens dmu_tx_commit(tx); 1347fa9e4066Sahrens out: 1348fa9e4066Sahrens zfs_dirent_unlock(dl); 1349fa9e4066Sahrens 1350fa9e4066Sahrens if (!delete_now) { 1351fa9e4066Sahrens VN_RELE(vp); 1352fa9e4066Sahrens } else if (xzp) { 1353fa9e4066Sahrens /* this rele delayed to prevent nesting transactions */ 1354fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 1355fa9e4066Sahrens } 1356fa9e4066Sahrens 1357fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1358fa9e4066Sahrens return (error); 1359fa9e4066Sahrens } 1360fa9e4066Sahrens 1361fa9e4066Sahrens /* 1362fa9e4066Sahrens * Create a new directory and insert it into dvp using the name 1363fa9e4066Sahrens * provided. Return a pointer to the inserted directory. 1364fa9e4066Sahrens * 1365fa9e4066Sahrens * IN: dvp - vnode of directory to add subdir to. 1366fa9e4066Sahrens * dirname - name of new directory. 1367fa9e4066Sahrens * vap - attributes of new directory. 1368fa9e4066Sahrens * cr - credentials of caller. 1369fa9e4066Sahrens * 1370fa9e4066Sahrens * OUT: vpp - vnode of created directory. 1371fa9e4066Sahrens * 1372fa9e4066Sahrens * RETURN: 0 if success 1373fa9e4066Sahrens * error code if failure 1374fa9e4066Sahrens * 1375fa9e4066Sahrens * Timestamps: 1376fa9e4066Sahrens * dvp - ctime|mtime updated 1377fa9e4066Sahrens * vp - ctime|mtime|atime updated 1378fa9e4066Sahrens */ 1379fa9e4066Sahrens static int 1380fa9e4066Sahrens zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr) 1381fa9e4066Sahrens { 1382fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1383fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1384fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1385fa9e4066Sahrens zfs_dirlock_t *dl; 1386fa9e4066Sahrens uint64_t zoid = 0; 1387fa9e4066Sahrens dmu_tx_t *tx; 1388fa9e4066Sahrens int error; 1389fa9e4066Sahrens 1390fa9e4066Sahrens ASSERT(vap->va_type == VDIR); 1391fa9e4066Sahrens 1392fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1393fa9e4066Sahrens 1394fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) { 1395fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1396fa9e4066Sahrens return (EINVAL); 1397fa9e4066Sahrens } 1398fa9e4066Sahrens top: 1399fa9e4066Sahrens *vpp = NULL; 1400fa9e4066Sahrens 1401fa9e4066Sahrens /* 1402fa9e4066Sahrens * First make sure the new directory doesn't exist. 1403fa9e4066Sahrens */ 1404fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, ZNEW)) { 1405fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1406fa9e4066Sahrens return (error); 1407fa9e4066Sahrens } 1408fa9e4066Sahrens 1409d2443e76Smarks if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, cr)) { 1410d2443e76Smarks zfs_dirent_unlock(dl); 1411d2443e76Smarks ZFS_EXIT(zfsvfs); 1412d2443e76Smarks return (error); 1413d2443e76Smarks } 1414d2443e76Smarks 1415fa9e4066Sahrens /* 1416fa9e4066Sahrens * Add a new entry to the directory. 1417fa9e4066Sahrens */ 1418fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1419ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 1420ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 1421fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 1422fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1423fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1424fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1425fa9e4066Sahrens if (error) { 1426fa9e4066Sahrens zfs_dirent_unlock(dl); 1427fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 14288a2f1b91Sahrens dmu_tx_wait(tx); 14298a2f1b91Sahrens dmu_tx_abort(tx); 1430fa9e4066Sahrens goto top; 1431fa9e4066Sahrens } 14328a2f1b91Sahrens dmu_tx_abort(tx); 1433fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1434fa9e4066Sahrens return (error); 1435fa9e4066Sahrens } 1436fa9e4066Sahrens 1437fa9e4066Sahrens /* 1438fa9e4066Sahrens * Create new node. 1439fa9e4066Sahrens */ 1440fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); 1441fa9e4066Sahrens 1442fa9e4066Sahrens /* 1443fa9e4066Sahrens * Now put new name in parent dir. 1444fa9e4066Sahrens */ 1445fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1446fa9e4066Sahrens 1447fa9e4066Sahrens *vpp = ZTOV(zp); 1448fa9e4066Sahrens 1449b19a79ecSperrin zfs_log_create(zilog, tx, TX_MKDIR, dzp, zp, dirname); 1450fa9e4066Sahrens dmu_tx_commit(tx); 1451fa9e4066Sahrens 1452fa9e4066Sahrens zfs_dirent_unlock(dl); 1453fa9e4066Sahrens 1454fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1455fa9e4066Sahrens return (0); 1456fa9e4066Sahrens } 1457fa9e4066Sahrens 1458fa9e4066Sahrens /* 1459fa9e4066Sahrens * Remove a directory subdir entry. If the current working 1460fa9e4066Sahrens * directory is the same as the subdir to be removed, the 1461fa9e4066Sahrens * remove will fail. 1462fa9e4066Sahrens * 1463fa9e4066Sahrens * IN: dvp - vnode of directory to remove from. 1464fa9e4066Sahrens * name - name of directory to be removed. 1465fa9e4066Sahrens * cwd - vnode of current working directory. 1466fa9e4066Sahrens * cr - credentials of caller. 1467fa9e4066Sahrens * 1468fa9e4066Sahrens * RETURN: 0 if success 1469fa9e4066Sahrens * error code if failure 1470fa9e4066Sahrens * 1471fa9e4066Sahrens * Timestamps: 1472fa9e4066Sahrens * dvp - ctime|mtime updated 1473fa9e4066Sahrens */ 1474fa9e4066Sahrens static int 1475fa9e4066Sahrens zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr) 1476fa9e4066Sahrens { 1477fa9e4066Sahrens znode_t *dzp = VTOZ(dvp); 1478fa9e4066Sahrens znode_t *zp; 1479fa9e4066Sahrens vnode_t *vp; 1480fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1481fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1482fa9e4066Sahrens zfs_dirlock_t *dl; 1483fa9e4066Sahrens dmu_tx_t *tx; 1484fa9e4066Sahrens int error; 1485fa9e4066Sahrens 1486fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1487fa9e4066Sahrens 1488fa9e4066Sahrens top: 1489fa9e4066Sahrens zp = NULL; 1490fa9e4066Sahrens 1491fa9e4066Sahrens /* 1492fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1493fa9e4066Sahrens */ 1494fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZEXISTS)) { 1495fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1496fa9e4066Sahrens return (error); 1497fa9e4066Sahrens } 1498fa9e4066Sahrens 1499fa9e4066Sahrens vp = ZTOV(zp); 1500fa9e4066Sahrens 1501fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1502fa9e4066Sahrens goto out; 1503fa9e4066Sahrens } 1504fa9e4066Sahrens 1505fa9e4066Sahrens if (vp->v_type != VDIR) { 1506fa9e4066Sahrens error = ENOTDIR; 1507fa9e4066Sahrens goto out; 1508fa9e4066Sahrens } 1509fa9e4066Sahrens 1510fa9e4066Sahrens if (vp == cwd) { 1511fa9e4066Sahrens error = EINVAL; 1512fa9e4066Sahrens goto out; 1513fa9e4066Sahrens } 1514fa9e4066Sahrens 1515fa9e4066Sahrens vnevent_rmdir(vp); 1516fa9e4066Sahrens 1517fa9e4066Sahrens /* 1518af2c4821Smaybee * Grab a lock on the directory to make sure that noone is 1519af2c4821Smaybee * trying to add (or lookup) entries while we are removing it. 1520af2c4821Smaybee */ 1521af2c4821Smaybee rw_enter(&zp->z_name_lock, RW_WRITER); 1522af2c4821Smaybee 1523af2c4821Smaybee /* 1524af2c4821Smaybee * Grab a lock on the parent pointer to make sure we play well 1525fa9e4066Sahrens * with the treewalk and directory rename code. 1526fa9e4066Sahrens */ 1527fa9e4066Sahrens rw_enter(&zp->z_parent_lock, RW_WRITER); 1528fa9e4066Sahrens 1529fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1530ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1531fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1532893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1533fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1534fa9e4066Sahrens if (error) { 1535fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1536af2c4821Smaybee rw_exit(&zp->z_name_lock); 1537fa9e4066Sahrens zfs_dirent_unlock(dl); 1538fa9e4066Sahrens VN_RELE(vp); 1539fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 15408a2f1b91Sahrens dmu_tx_wait(tx); 15418a2f1b91Sahrens dmu_tx_abort(tx); 1542fa9e4066Sahrens goto top; 1543fa9e4066Sahrens } 15448a2f1b91Sahrens dmu_tx_abort(tx); 1545fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1546fa9e4066Sahrens return (error); 1547fa9e4066Sahrens } 1548fa9e4066Sahrens 1549fa9e4066Sahrens error = zfs_link_destroy(dl, zp, tx, 0, NULL); 1550fa9e4066Sahrens 1551fa9e4066Sahrens if (error == 0) 1552b19a79ecSperrin zfs_log_remove(zilog, tx, TX_RMDIR, dzp, name); 1553fa9e4066Sahrens 1554fa9e4066Sahrens dmu_tx_commit(tx); 1555fa9e4066Sahrens 1556fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1557af2c4821Smaybee rw_exit(&zp->z_name_lock); 1558fa9e4066Sahrens out: 1559fa9e4066Sahrens zfs_dirent_unlock(dl); 1560fa9e4066Sahrens 1561fa9e4066Sahrens VN_RELE(vp); 1562fa9e4066Sahrens 1563fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1564fa9e4066Sahrens return (error); 1565fa9e4066Sahrens } 1566fa9e4066Sahrens 1567fa9e4066Sahrens /* 1568fa9e4066Sahrens * Read as many directory entries as will fit into the provided 1569fa9e4066Sahrens * buffer from the given directory cursor position (specified in 1570fa9e4066Sahrens * the uio structure. 1571fa9e4066Sahrens * 1572fa9e4066Sahrens * IN: vp - vnode of directory to read. 1573fa9e4066Sahrens * uio - structure supplying read location, range info, 1574fa9e4066Sahrens * and return buffer. 1575fa9e4066Sahrens * cr - credentials of caller. 1576fa9e4066Sahrens * 1577fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 1578fa9e4066Sahrens * eofp - set to true if end-of-file detected. 1579fa9e4066Sahrens * 1580fa9e4066Sahrens * RETURN: 0 if success 1581fa9e4066Sahrens * error code if failure 1582fa9e4066Sahrens * 1583fa9e4066Sahrens * Timestamps: 1584fa9e4066Sahrens * vp - atime updated 1585fa9e4066Sahrens * 1586fa9e4066Sahrens * Note that the low 4 bits of the cookie returned by zap is always zero. 1587fa9e4066Sahrens * This allows us to use the low range for "special" directory entries: 1588fa9e4066Sahrens * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 1589fa9e4066Sahrens * we use the offset 2 for the '.zfs' directory. 1590fa9e4066Sahrens */ 1591fa9e4066Sahrens /* ARGSUSED */ 1592fa9e4066Sahrens static int 1593fa9e4066Sahrens zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp) 1594fa9e4066Sahrens { 1595fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1596fa9e4066Sahrens iovec_t *iovp; 1597fa9e4066Sahrens dirent64_t *odp; 1598fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 15997f6e3e7dSperrin objset_t *os; 1600fa9e4066Sahrens caddr_t outbuf; 1601fa9e4066Sahrens size_t bufsize; 1602fa9e4066Sahrens zap_cursor_t zc; 1603fa9e4066Sahrens zap_attribute_t zap; 1604fa9e4066Sahrens uint_t bytes_wanted; 1605fa9e4066Sahrens uint64_t offset; /* must be unsigned; checks for < 1 */ 1606fa9e4066Sahrens int local_eof; 16077f6e3e7dSperrin int outcount; 16087f6e3e7dSperrin int error; 16097f6e3e7dSperrin uint8_t prefetch; 1610fa9e4066Sahrens 1611fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1612fa9e4066Sahrens 1613fa9e4066Sahrens /* 1614fa9e4066Sahrens * If we are not given an eof variable, 1615fa9e4066Sahrens * use a local one. 1616fa9e4066Sahrens */ 1617fa9e4066Sahrens if (eofp == NULL) 1618fa9e4066Sahrens eofp = &local_eof; 1619fa9e4066Sahrens 1620fa9e4066Sahrens /* 1621fa9e4066Sahrens * Check for valid iov_len. 1622fa9e4066Sahrens */ 1623fa9e4066Sahrens if (uio->uio_iov->iov_len <= 0) { 1624fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1625fa9e4066Sahrens return (EINVAL); 1626fa9e4066Sahrens } 1627fa9e4066Sahrens 1628fa9e4066Sahrens /* 1629fa9e4066Sahrens * Quit if directory has been removed (posix) 1630fa9e4066Sahrens */ 1631893a6d32Sahrens if ((*eofp = zp->z_unlinked) != 0) { 1632fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1633fa9e4066Sahrens return (0); 1634fa9e4066Sahrens } 1635fa9e4066Sahrens 16367f6e3e7dSperrin error = 0; 16377f6e3e7dSperrin os = zfsvfs->z_os; 16387f6e3e7dSperrin offset = uio->uio_loffset; 16397f6e3e7dSperrin prefetch = zp->z_zn_prefetch; 16407f6e3e7dSperrin 1641fa9e4066Sahrens /* 1642fa9e4066Sahrens * Initialize the iterator cursor. 1643fa9e4066Sahrens */ 1644fa9e4066Sahrens if (offset <= 3) { 1645fa9e4066Sahrens /* 1646fa9e4066Sahrens * Start iteration from the beginning of the directory. 1647fa9e4066Sahrens */ 16487f6e3e7dSperrin zap_cursor_init(&zc, os, zp->z_id); 1649fa9e4066Sahrens } else { 1650fa9e4066Sahrens /* 1651fa9e4066Sahrens * The offset is a serialized cursor. 1652fa9e4066Sahrens */ 16537f6e3e7dSperrin zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 1654fa9e4066Sahrens } 1655fa9e4066Sahrens 1656fa9e4066Sahrens /* 1657fa9e4066Sahrens * Get space to change directory entries into fs independent format. 1658fa9e4066Sahrens */ 1659fa9e4066Sahrens iovp = uio->uio_iov; 1660fa9e4066Sahrens bytes_wanted = iovp->iov_len; 1661fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 1662fa9e4066Sahrens bufsize = bytes_wanted; 1663fa9e4066Sahrens outbuf = kmem_alloc(bufsize, KM_SLEEP); 1664fa9e4066Sahrens odp = (struct dirent64 *)outbuf; 1665fa9e4066Sahrens } else { 1666fa9e4066Sahrens bufsize = bytes_wanted; 1667fa9e4066Sahrens odp = (struct dirent64 *)iovp->iov_base; 1668fa9e4066Sahrens } 1669fa9e4066Sahrens 1670fa9e4066Sahrens /* 1671fa9e4066Sahrens * Transform to file-system independent format 1672fa9e4066Sahrens */ 1673fa9e4066Sahrens outcount = 0; 1674fa9e4066Sahrens while (outcount < bytes_wanted) { 1675b1b8ab34Slling ino64_t objnum; 1676b1b8ab34Slling ushort_t reclen; 1677b1b8ab34Slling off64_t *next; 1678b1b8ab34Slling 1679fa9e4066Sahrens /* 1680fa9e4066Sahrens * Special case `.', `..', and `.zfs'. 1681fa9e4066Sahrens */ 1682fa9e4066Sahrens if (offset == 0) { 1683fa9e4066Sahrens (void) strcpy(zap.za_name, "."); 1684b1b8ab34Slling objnum = zp->z_id; 1685fa9e4066Sahrens } else if (offset == 1) { 1686fa9e4066Sahrens (void) strcpy(zap.za_name, ".."); 1687b1b8ab34Slling objnum = zp->z_phys->zp_parent; 1688fa9e4066Sahrens } else if (offset == 2 && zfs_show_ctldir(zp)) { 1689fa9e4066Sahrens (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 1690b1b8ab34Slling objnum = ZFSCTL_INO_ROOT; 1691fa9e4066Sahrens } else { 1692fa9e4066Sahrens /* 1693fa9e4066Sahrens * Grab next entry. 1694fa9e4066Sahrens */ 1695fa9e4066Sahrens if (error = zap_cursor_retrieve(&zc, &zap)) { 1696fa9e4066Sahrens if ((*eofp = (error == ENOENT)) != 0) 1697fa9e4066Sahrens break; 1698fa9e4066Sahrens else 1699fa9e4066Sahrens goto update; 1700fa9e4066Sahrens } 1701fa9e4066Sahrens 1702fa9e4066Sahrens if (zap.za_integer_length != 8 || 1703fa9e4066Sahrens zap.za_num_integers != 1) { 1704fa9e4066Sahrens cmn_err(CE_WARN, "zap_readdir: bad directory " 1705fa9e4066Sahrens "entry, obj = %lld, offset = %lld\n", 1706fa9e4066Sahrens (u_longlong_t)zp->z_id, 1707fa9e4066Sahrens (u_longlong_t)offset); 1708fa9e4066Sahrens error = ENXIO; 1709fa9e4066Sahrens goto update; 1710fa9e4066Sahrens } 1711b1b8ab34Slling 1712b1b8ab34Slling objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); 1713b1b8ab34Slling /* 1714b1b8ab34Slling * MacOS X can extract the object type here such as: 1715b1b8ab34Slling * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); 1716b1b8ab34Slling */ 1717fa9e4066Sahrens } 1718b1b8ab34Slling reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 1719fa9e4066Sahrens 1720fa9e4066Sahrens /* 1721fa9e4066Sahrens * Will this entry fit in the buffer? 1722fa9e4066Sahrens */ 1723b1b8ab34Slling if (outcount + reclen > bufsize) { 1724fa9e4066Sahrens /* 1725fa9e4066Sahrens * Did we manage to fit anything in the buffer? 1726fa9e4066Sahrens */ 1727fa9e4066Sahrens if (!outcount) { 1728fa9e4066Sahrens error = EINVAL; 1729fa9e4066Sahrens goto update; 1730fa9e4066Sahrens } 1731fa9e4066Sahrens break; 1732fa9e4066Sahrens } 1733fa9e4066Sahrens /* 1734fa9e4066Sahrens * Add this entry: 1735fa9e4066Sahrens */ 1736b1b8ab34Slling odp->d_ino = objnum; 1737b1b8ab34Slling odp->d_reclen = reclen; 1738fa9e4066Sahrens /* NOTE: d_off is the offset for the *next* entry */ 1739fa9e4066Sahrens next = &(odp->d_off); 1740fa9e4066Sahrens (void) strncpy(odp->d_name, zap.za_name, 1741b1b8ab34Slling DIRENT64_NAMELEN(reclen)); 1742b1b8ab34Slling outcount += reclen; 1743b1b8ab34Slling odp = (dirent64_t *)((intptr_t)odp + reclen); 1744fa9e4066Sahrens 1745fa9e4066Sahrens ASSERT(outcount <= bufsize); 1746fa9e4066Sahrens 1747fa9e4066Sahrens /* Prefetch znode */ 17487f6e3e7dSperrin if (prefetch) 1749b1b8ab34Slling dmu_prefetch(os, objnum, 0, 0); 1750fa9e4066Sahrens 1751fa9e4066Sahrens /* 1752fa9e4066Sahrens * Move to the next entry, fill in the previous offset. 1753fa9e4066Sahrens */ 1754fa9e4066Sahrens if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 1755fa9e4066Sahrens zap_cursor_advance(&zc); 1756fa9e4066Sahrens offset = zap_cursor_serialize(&zc); 1757fa9e4066Sahrens } else { 1758fa9e4066Sahrens offset += 1; 1759fa9e4066Sahrens } 1760fa9e4066Sahrens *next = offset; 1761fa9e4066Sahrens } 17627f6e3e7dSperrin zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 1763fa9e4066Sahrens 1764fa9e4066Sahrens if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 1765fa9e4066Sahrens iovp->iov_base += outcount; 1766fa9e4066Sahrens iovp->iov_len -= outcount; 1767fa9e4066Sahrens uio->uio_resid -= outcount; 1768fa9e4066Sahrens } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 1769fa9e4066Sahrens /* 1770fa9e4066Sahrens * Reset the pointer. 1771fa9e4066Sahrens */ 1772fa9e4066Sahrens offset = uio->uio_loffset; 1773fa9e4066Sahrens } 1774fa9e4066Sahrens 1775fa9e4066Sahrens update: 177687e5029aSahrens zap_cursor_fini(&zc); 1777fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1778fa9e4066Sahrens kmem_free(outbuf, bufsize); 1779fa9e4066Sahrens 1780fa9e4066Sahrens if (error == ENOENT) 1781fa9e4066Sahrens error = 0; 1782fa9e4066Sahrens 1783fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 1784fa9e4066Sahrens 1785fa9e4066Sahrens uio->uio_loffset = offset; 1786fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1787fa9e4066Sahrens return (error); 1788fa9e4066Sahrens } 1789fa9e4066Sahrens 1790fa9e4066Sahrens static int 1791fa9e4066Sahrens zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr) 1792fa9e4066Sahrens { 1793fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1794fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1795fa9e4066Sahrens 1796b468a217Seschrock /* 1797b468a217Seschrock * Regardless of whether this is required for standards conformance, 1798b468a217Seschrock * this is the logical behavior when fsync() is called on a file with 1799b468a217Seschrock * dirty pages. We use B_ASYNC since the ZIL transactions are already 1800b468a217Seschrock * going to be pushed out as part of the zil_commit(). 1801b468a217Seschrock */ 1802b468a217Seschrock if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && 1803b468a217Seschrock (vp->v_type == VREG) && !(IS_SWAPVP(vp))) 1804b468a217Seschrock (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr); 1805b468a217Seschrock 1806fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1807b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 1808fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1809fa9e4066Sahrens return (0); 1810fa9e4066Sahrens } 1811fa9e4066Sahrens 1812fa9e4066Sahrens /* 1813fa9e4066Sahrens * Get the requested file attributes and place them in the provided 1814fa9e4066Sahrens * vattr structure. 1815fa9e4066Sahrens * 1816fa9e4066Sahrens * IN: vp - vnode of file. 1817fa9e4066Sahrens * vap - va_mask identifies requested attributes. 1818fa9e4066Sahrens * flags - [UNUSED] 1819fa9e4066Sahrens * cr - credentials of caller. 1820fa9e4066Sahrens * 1821fa9e4066Sahrens * OUT: vap - attribute values. 1822fa9e4066Sahrens * 1823fa9e4066Sahrens * RETURN: 0 (always succeeds) 1824fa9e4066Sahrens */ 1825fa9e4066Sahrens /* ARGSUSED */ 1826fa9e4066Sahrens static int 1827fa9e4066Sahrens zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr) 1828fa9e4066Sahrens { 1829fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1830fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1831fa9e4066Sahrens znode_phys_t *pzp = zp->z_phys; 1832fa9e4066Sahrens int error; 1833fa9e4066Sahrens 1834fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1835fa9e4066Sahrens 1836fa9e4066Sahrens /* 1837fa9e4066Sahrens * Return all attributes. It's cheaper to provide the answer 1838fa9e4066Sahrens * than to determine whether we were asked the question. 1839fa9e4066Sahrens */ 1840fa9e4066Sahrens mutex_enter(&zp->z_lock); 1841fa9e4066Sahrens 1842fa9e4066Sahrens vap->va_type = vp->v_type; 1843fa9e4066Sahrens vap->va_mode = pzp->zp_mode & MODEMASK; 1844fa9e4066Sahrens vap->va_uid = zp->z_phys->zp_uid; 1845fa9e4066Sahrens vap->va_gid = zp->z_phys->zp_gid; 1846fa9e4066Sahrens vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 1847fa9e4066Sahrens vap->va_nodeid = zp->z_id; 1848fa9e4066Sahrens vap->va_nlink = MIN(pzp->zp_links, UINT32_MAX); /* nlink_t limit! */ 1849fa9e4066Sahrens vap->va_size = pzp->zp_size; 185072fc53bcSmarks vap->va_rdev = vp->v_rdev; 1851fa9e4066Sahrens vap->va_seq = zp->z_seq; 1852fa9e4066Sahrens 1853fa9e4066Sahrens ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime); 1854fa9e4066Sahrens ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime); 1855fa9e4066Sahrens ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime); 1856fa9e4066Sahrens 1857fa9e4066Sahrens /* 1858de122929Smarks * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 1859de122929Smarks * Also, if we are the owner don't bother, since owner should 1860de122929Smarks * always be allowed to read basic attributes of file. 1861fa9e4066Sahrens */ 1862de122929Smarks if (!(zp->z_phys->zp_flags & ZFS_ACL_TRIVIAL) && 1863de122929Smarks (zp->z_phys->zp_uid != crgetuid(cr))) { 1864de122929Smarks if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, cr)) { 1865fa9e4066Sahrens mutex_exit(&zp->z_lock); 1866fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1867fa9e4066Sahrens return (error); 1868fa9e4066Sahrens } 1869fa9e4066Sahrens } 1870fa9e4066Sahrens 1871fa9e4066Sahrens mutex_exit(&zp->z_lock); 1872fa9e4066Sahrens 1873fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks); 1874fa9e4066Sahrens 1875fa9e4066Sahrens if (zp->z_blksz == 0) { 1876fa9e4066Sahrens /* 1877fa9e4066Sahrens * Block size hasn't been set; suggest maximal I/O transfers. 1878fa9e4066Sahrens */ 1879fa9e4066Sahrens vap->va_blksize = zfsvfs->z_max_blksz; 1880fa9e4066Sahrens } 1881fa9e4066Sahrens 1882fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1883fa9e4066Sahrens return (0); 1884fa9e4066Sahrens } 1885fa9e4066Sahrens 1886fa9e4066Sahrens /* 1887fa9e4066Sahrens * Set the file attributes to the values contained in the 1888fa9e4066Sahrens * vattr structure. 1889fa9e4066Sahrens * 1890fa9e4066Sahrens * IN: vp - vnode of file to be modified. 1891fa9e4066Sahrens * vap - new attribute values. 1892fa9e4066Sahrens * flags - ATTR_UTIME set if non-default time values provided. 1893fa9e4066Sahrens * cr - credentials of caller. 1894fa9e4066Sahrens * 1895fa9e4066Sahrens * RETURN: 0 if success 1896fa9e4066Sahrens * error code if failure 1897fa9e4066Sahrens * 1898fa9e4066Sahrens * Timestamps: 1899fa9e4066Sahrens * vp - ctime updated, mtime updated if size changed. 1900fa9e4066Sahrens */ 1901fa9e4066Sahrens /* ARGSUSED */ 1902fa9e4066Sahrens static int 1903fa9e4066Sahrens zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 1904fa9e4066Sahrens caller_context_t *ct) 1905fa9e4066Sahrens { 1906fa9e4066Sahrens struct znode *zp = VTOZ(vp); 1907fa9e4066Sahrens znode_phys_t *pzp = zp->z_phys; 1908fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1909fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1910fa9e4066Sahrens dmu_tx_t *tx; 1911fa9e4066Sahrens vattr_t oldva; 19125730cc9aSmaybee uint_t mask = vap->va_mask; 19135730cc9aSmaybee uint_t saved_mask; 1914f92daba9Smarks int trim_mask = 0; 1915fa9e4066Sahrens uint64_t new_mode; 1916d2443e76Smarks znode_t *attrzp; 1917fa9e4066Sahrens int need_policy = FALSE; 1918fa9e4066Sahrens int err; 1919fa9e4066Sahrens 1920fa9e4066Sahrens if (mask == 0) 1921fa9e4066Sahrens return (0); 1922fa9e4066Sahrens 1923fa9e4066Sahrens if (mask & AT_NOSET) 1924fa9e4066Sahrens return (EINVAL); 1925fa9e4066Sahrens 1926fa9e4066Sahrens if (mask & AT_SIZE && vp->v_type == VDIR) 1927fa9e4066Sahrens return (EISDIR); 1928fa9e4066Sahrens 19298ef9dde0Smarks if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) 193084c5a155Smarks return (EINVAL); 193184c5a155Smarks 1932fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1933fa9e4066Sahrens 1934fa9e4066Sahrens top: 1935d2443e76Smarks attrzp = NULL; 1936fa9e4066Sahrens 1937fa9e4066Sahrens if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 1938fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1939fa9e4066Sahrens return (EROFS); 1940fa9e4066Sahrens } 1941fa9e4066Sahrens 1942fa9e4066Sahrens /* 1943fa9e4066Sahrens * First validate permissions 1944fa9e4066Sahrens */ 1945fa9e4066Sahrens 1946fa9e4066Sahrens if (mask & AT_SIZE) { 1947fa9e4066Sahrens err = zfs_zaccess(zp, ACE_WRITE_DATA, cr); 1948fa9e4066Sahrens if (err) { 1949fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1950fa9e4066Sahrens return (err); 1951fa9e4066Sahrens } 19525730cc9aSmaybee /* 19535730cc9aSmaybee * XXX - Note, we are not providing any open 19545730cc9aSmaybee * mode flags here (like FNDELAY), so we may 19555730cc9aSmaybee * block if there are locks present... this 19565730cc9aSmaybee * should be addressed in openat(). 19575730cc9aSmaybee */ 19585730cc9aSmaybee do { 19595730cc9aSmaybee err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 19608a2f1b91Sahrens /* NB: we already did dmu_tx_wait() if necessary */ 19615730cc9aSmaybee } while (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT); 19625730cc9aSmaybee if (err) { 19635730cc9aSmaybee ZFS_EXIT(zfsvfs); 19645730cc9aSmaybee return (err); 19655730cc9aSmaybee } 1966fa9e4066Sahrens } 1967fa9e4066Sahrens 1968fa9e4066Sahrens if (mask & (AT_ATIME|AT_MTIME)) 1969fa9e4066Sahrens need_policy = zfs_zaccess_v4_perm(zp, ACE_WRITE_ATTRIBUTES, cr); 1970fa9e4066Sahrens 1971fa9e4066Sahrens if (mask & (AT_UID|AT_GID)) { 1972fa9e4066Sahrens int idmask = (mask & (AT_UID|AT_GID)); 1973fa9e4066Sahrens int take_owner; 1974fa9e4066Sahrens int take_group; 1975fa9e4066Sahrens 1976a933bc41Smarks /* 1977a933bc41Smarks * NOTE: even if a new mode is being set, 1978a933bc41Smarks * we may clear S_ISUID/S_ISGID bits. 1979a933bc41Smarks */ 1980a933bc41Smarks 1981a933bc41Smarks if (!(mask & AT_MODE)) 1982a933bc41Smarks vap->va_mode = pzp->zp_mode; 1983a933bc41Smarks 1984fa9e4066Sahrens /* 1985fa9e4066Sahrens * Take ownership or chgrp to group we are a member of 1986fa9e4066Sahrens */ 1987fa9e4066Sahrens 1988fa9e4066Sahrens take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 1989fa9e4066Sahrens take_group = (mask & AT_GID) && groupmember(vap->va_gid, cr); 1990fa9e4066Sahrens 1991fa9e4066Sahrens /* 1992fa9e4066Sahrens * If both AT_UID and AT_GID are set then take_owner and 1993fa9e4066Sahrens * take_group must both be set in order to allow taking 1994fa9e4066Sahrens * ownership. 1995fa9e4066Sahrens * 1996fa9e4066Sahrens * Otherwise, send the check through secpolicy_vnode_setattr() 1997fa9e4066Sahrens * 1998fa9e4066Sahrens */ 1999fa9e4066Sahrens 2000fa9e4066Sahrens if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 2001fa9e4066Sahrens ((idmask == AT_UID) && take_owner) || 2002fa9e4066Sahrens ((idmask == AT_GID) && take_group)) { 2003fa9e4066Sahrens if (zfs_zaccess_v4_perm(zp, ACE_WRITE_OWNER, cr) == 0) { 2004fa9e4066Sahrens /* 2005fa9e4066Sahrens * Remove setuid/setgid for non-privileged users 2006fa9e4066Sahrens */ 200713f9f30eSmarks secpolicy_setid_clear(vap, cr); 2008f92daba9Smarks trim_mask = (mask & (AT_UID|AT_GID)); 2009fa9e4066Sahrens } else { 2010fa9e4066Sahrens need_policy = TRUE; 2011fa9e4066Sahrens } 2012fa9e4066Sahrens } else { 2013fa9e4066Sahrens need_policy = TRUE; 2014fa9e4066Sahrens } 2015fa9e4066Sahrens } 2016fa9e4066Sahrens 2017f92daba9Smarks mutex_enter(&zp->z_lock); 2018f92daba9Smarks oldva.va_mode = pzp->zp_mode; 2019f92daba9Smarks oldva.va_uid = zp->z_phys->zp_uid; 2020f92daba9Smarks oldva.va_gid = zp->z_phys->zp_gid; 2021f92daba9Smarks mutex_exit(&zp->z_lock); 2022fa9e4066Sahrens 2023f92daba9Smarks if (mask & AT_MODE) { 2024f92daba9Smarks if (zfs_zaccess_v4_perm(zp, ACE_WRITE_ACL, cr) == 0) { 2025f92daba9Smarks err = secpolicy_setid_setsticky_clear(vp, vap, 2026f92daba9Smarks &oldva, cr); 2027f92daba9Smarks if (err) { 2028f92daba9Smarks ZFS_EXIT(zfsvfs); 2029f92daba9Smarks return (err); 2030f92daba9Smarks } 2031f92daba9Smarks trim_mask |= AT_MODE; 2032f92daba9Smarks } else { 2033f92daba9Smarks need_policy = TRUE; 2034f92daba9Smarks } 2035f92daba9Smarks } 203613f9f30eSmarks 2037f92daba9Smarks if (need_policy) { 203813f9f30eSmarks /* 203913f9f30eSmarks * If trim_mask is set then take ownership 2040f92daba9Smarks * has been granted or write_acl is present and user 2041f92daba9Smarks * has the ability to modify mode. In that case remove 2042f92daba9Smarks * UID|GID and or MODE from mask so that 204313f9f30eSmarks * secpolicy_vnode_setattr() doesn't revoke it. 204413f9f30eSmarks */ 204513f9f30eSmarks 2046f92daba9Smarks if (trim_mask) { 2047f92daba9Smarks saved_mask = vap->va_mask; 2048f92daba9Smarks vap->va_mask &= ~trim_mask; 2049f92daba9Smarks 2050f92daba9Smarks } 2051fa9e4066Sahrens err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 2052fa9e4066Sahrens (int (*)(void *, int, cred_t *))zfs_zaccess_rwx, zp); 2053fa9e4066Sahrens if (err) { 2054fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2055fa9e4066Sahrens return (err); 2056fa9e4066Sahrens } 205713f9f30eSmarks 205813f9f30eSmarks if (trim_mask) 2059f92daba9Smarks vap->va_mask |= saved_mask; 2060fa9e4066Sahrens } 2061fa9e4066Sahrens 2062fa9e4066Sahrens /* 2063fa9e4066Sahrens * secpolicy_vnode_setattr, or take ownership may have 2064fa9e4066Sahrens * changed va_mask 2065fa9e4066Sahrens */ 2066fa9e4066Sahrens mask = vap->va_mask; 2067fa9e4066Sahrens 2068fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2069fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 2070fa9e4066Sahrens 2071fa9e4066Sahrens if (mask & AT_MODE) { 2072169cdae2Smarks uint64_t pmode = pzp->zp_mode; 2073fa9e4066Sahrens 2074169cdae2Smarks new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 2075fa9e4066Sahrens 2076fa9e4066Sahrens if (zp->z_phys->zp_acl.z_acl_extern_obj) 2077fa9e4066Sahrens dmu_tx_hold_write(tx, 2078fa9e4066Sahrens pzp->zp_acl.z_acl_extern_obj, 0, SPA_MAXBLOCKSIZE); 2079fa9e4066Sahrens else 2080fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 2081fa9e4066Sahrens 0, ZFS_ACL_SIZE(MAX_ACL_SIZE)); 2082fa9e4066Sahrens } 2083fa9e4066Sahrens 2084d2443e76Smarks if ((mask & (AT_UID | AT_GID)) && zp->z_phys->zp_xattr != 0) { 2085d2443e76Smarks err = zfs_zget(zp->z_zfsvfs, zp->z_phys->zp_xattr, &attrzp); 2086d2443e76Smarks if (err) { 2087d2443e76Smarks dmu_tx_abort(tx); 2088d2443e76Smarks ZFS_EXIT(zfsvfs); 2089d2443e76Smarks return (err); 2090d2443e76Smarks } 2091d2443e76Smarks dmu_tx_hold_bonus(tx, attrzp->z_id); 2092d2443e76Smarks } 2093d2443e76Smarks 2094fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 2095fa9e4066Sahrens if (err) { 2096d2443e76Smarks if (attrzp) 2097d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2098fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 20998a2f1b91Sahrens dmu_tx_wait(tx); 21008a2f1b91Sahrens dmu_tx_abort(tx); 2101fa9e4066Sahrens goto top; 2102fa9e4066Sahrens } 21038a2f1b91Sahrens dmu_tx_abort(tx); 2104fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2105fa9e4066Sahrens return (err); 2106fa9e4066Sahrens } 2107fa9e4066Sahrens 2108fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 2109fa9e4066Sahrens 2110fa9e4066Sahrens /* 2111fa9e4066Sahrens * Set each attribute requested. 2112fa9e4066Sahrens * We group settings according to the locks they need to acquire. 2113fa9e4066Sahrens * 2114fa9e4066Sahrens * Note: you cannot set ctime directly, although it will be 2115fa9e4066Sahrens * updated as a side-effect of calling this function. 2116fa9e4066Sahrens */ 2117fa9e4066Sahrens 2118fa9e4066Sahrens mutex_enter(&zp->z_lock); 2119fa9e4066Sahrens 2120fa9e4066Sahrens if (mask & AT_MODE) { 2121fa9e4066Sahrens err = zfs_acl_chmod_setattr(zp, new_mode, tx); 2122fa9e4066Sahrens ASSERT3U(err, ==, 0); 2123fa9e4066Sahrens } 2124fa9e4066Sahrens 2125d2443e76Smarks if (attrzp) 2126d2443e76Smarks mutex_enter(&attrzp->z_lock); 2127d2443e76Smarks 2128d2443e76Smarks if (mask & AT_UID) { 2129fa9e4066Sahrens zp->z_phys->zp_uid = (uint64_t)vap->va_uid; 2130d2443e76Smarks if (attrzp) { 2131d2443e76Smarks attrzp->z_phys->zp_uid = (uint64_t)vap->va_uid; 2132d2443e76Smarks } 2133d2443e76Smarks } 2134fa9e4066Sahrens 2135d2443e76Smarks if (mask & AT_GID) { 2136fa9e4066Sahrens zp->z_phys->zp_gid = (uint64_t)vap->va_gid; 2137d2443e76Smarks if (attrzp) 2138d2443e76Smarks attrzp->z_phys->zp_gid = (uint64_t)vap->va_gid; 2139d2443e76Smarks } 2140d2443e76Smarks 2141d2443e76Smarks if (attrzp) 2142d2443e76Smarks mutex_exit(&attrzp->z_lock); 2143fa9e4066Sahrens 2144fa9e4066Sahrens if (mask & AT_ATIME) 2145fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 2146fa9e4066Sahrens 2147fa9e4066Sahrens if (mask & AT_MTIME) 2148fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 2149fa9e4066Sahrens 21505730cc9aSmaybee if (mask & AT_SIZE) 2151fa9e4066Sahrens zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx); 21525730cc9aSmaybee else if (mask != 0) 2153fa9e4066Sahrens zfs_time_stamper_locked(zp, STATE_CHANGED, tx); 2154fa9e4066Sahrens 21555730cc9aSmaybee if (mask != 0) 2156b19a79ecSperrin zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask); 2157fa9e4066Sahrens 2158fa9e4066Sahrens mutex_exit(&zp->z_lock); 2159fa9e4066Sahrens 2160d2443e76Smarks if (attrzp) 2161d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2162d2443e76Smarks 2163fa9e4066Sahrens dmu_tx_commit(tx); 2164fa9e4066Sahrens 2165fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2166fa9e4066Sahrens return (err); 2167fa9e4066Sahrens } 2168fa9e4066Sahrens 2169fa9e4066Sahrens typedef struct zfs_zlock { 2170fa9e4066Sahrens krwlock_t *zl_rwlock; /* lock we acquired */ 2171fa9e4066Sahrens znode_t *zl_znode; /* znode we held */ 2172fa9e4066Sahrens struct zfs_zlock *zl_next; /* next in list */ 2173fa9e4066Sahrens } zfs_zlock_t; 2174fa9e4066Sahrens 2175ff008e00Smaybee /* 2176ff008e00Smaybee * Drop locks and release vnodes that were held by zfs_rename_lock(). 2177ff008e00Smaybee */ 2178ff008e00Smaybee static void 2179ff008e00Smaybee zfs_rename_unlock(zfs_zlock_t **zlpp) 2180ff008e00Smaybee { 2181ff008e00Smaybee zfs_zlock_t *zl; 2182ff008e00Smaybee 2183ff008e00Smaybee while ((zl = *zlpp) != NULL) { 2184ff008e00Smaybee if (zl->zl_znode != NULL) 2185ff008e00Smaybee VN_RELE(ZTOV(zl->zl_znode)); 2186ff008e00Smaybee rw_exit(zl->zl_rwlock); 2187ff008e00Smaybee *zlpp = zl->zl_next; 2188ff008e00Smaybee kmem_free(zl, sizeof (*zl)); 2189ff008e00Smaybee } 2190ff008e00Smaybee } 2191ff008e00Smaybee 2192ff008e00Smaybee /* 2193ff008e00Smaybee * Search back through the directory tree, using the ".." entries. 2194ff008e00Smaybee * Lock each directory in the chain to prevent concurrent renames. 2195ff008e00Smaybee * Fail any attempt to move a directory into one of its own descendants. 2196ff008e00Smaybee * XXX - z_parent_lock can overlap with map or grow locks 2197ff008e00Smaybee */ 2198fa9e4066Sahrens static int 2199fa9e4066Sahrens zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 2200fa9e4066Sahrens { 2201fa9e4066Sahrens zfs_zlock_t *zl; 2202feb08c6bSbillm znode_t *zp = tdzp; 2203fa9e4066Sahrens uint64_t rootid = zp->z_zfsvfs->z_root; 2204fa9e4066Sahrens uint64_t *oidp = &zp->z_id; 2205fa9e4066Sahrens krwlock_t *rwlp = &szp->z_parent_lock; 2206fa9e4066Sahrens krw_t rw = RW_WRITER; 2207fa9e4066Sahrens 2208fa9e4066Sahrens /* 2209fa9e4066Sahrens * First pass write-locks szp and compares to zp->z_id. 2210fa9e4066Sahrens * Later passes read-lock zp and compare to zp->z_parent. 2211fa9e4066Sahrens */ 2212fa9e4066Sahrens do { 2213ff008e00Smaybee if (!rw_tryenter(rwlp, rw)) { 2214ff008e00Smaybee /* 2215ff008e00Smaybee * Another thread is renaming in this path. 2216ff008e00Smaybee * Note that if we are a WRITER, we don't have any 2217ff008e00Smaybee * parent_locks held yet. 2218ff008e00Smaybee */ 2219ff008e00Smaybee if (rw == RW_READER && zp->z_id > szp->z_id) { 2220ff008e00Smaybee /* 2221ff008e00Smaybee * Drop our locks and restart 2222ff008e00Smaybee */ 2223ff008e00Smaybee zfs_rename_unlock(&zl); 2224ff008e00Smaybee *zlpp = NULL; 2225ff008e00Smaybee zp = tdzp; 2226ff008e00Smaybee oidp = &zp->z_id; 2227ff008e00Smaybee rwlp = &szp->z_parent_lock; 2228ff008e00Smaybee rw = RW_WRITER; 2229ff008e00Smaybee continue; 2230ff008e00Smaybee } else { 2231ff008e00Smaybee /* 2232ff008e00Smaybee * Wait for other thread to drop its locks 2233ff008e00Smaybee */ 2234ff008e00Smaybee rw_enter(rwlp, rw); 2235ff008e00Smaybee } 2236ff008e00Smaybee } 2237ff008e00Smaybee 2238fa9e4066Sahrens zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 2239fa9e4066Sahrens zl->zl_rwlock = rwlp; 2240fa9e4066Sahrens zl->zl_znode = NULL; 2241fa9e4066Sahrens zl->zl_next = *zlpp; 2242fa9e4066Sahrens *zlpp = zl; 2243fa9e4066Sahrens 2244fa9e4066Sahrens if (*oidp == szp->z_id) /* We're a descendant of szp */ 2245fa9e4066Sahrens return (EINVAL); 2246fa9e4066Sahrens 2247fa9e4066Sahrens if (*oidp == rootid) /* We've hit the top */ 2248fa9e4066Sahrens return (0); 2249fa9e4066Sahrens 2250fa9e4066Sahrens if (rw == RW_READER) { /* i.e. not the first pass */ 2251fa9e4066Sahrens int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp); 2252fa9e4066Sahrens if (error) 2253fa9e4066Sahrens return (error); 2254fa9e4066Sahrens zl->zl_znode = zp; 2255fa9e4066Sahrens } 2256fa9e4066Sahrens oidp = &zp->z_phys->zp_parent; 2257fa9e4066Sahrens rwlp = &zp->z_parent_lock; 2258fa9e4066Sahrens rw = RW_READER; 2259fa9e4066Sahrens 2260fa9e4066Sahrens } while (zp->z_id != sdzp->z_id); 2261fa9e4066Sahrens 2262fa9e4066Sahrens return (0); 2263fa9e4066Sahrens } 2264fa9e4066Sahrens 2265fa9e4066Sahrens /* 2266fa9e4066Sahrens * Move an entry from the provided source directory to the target 2267fa9e4066Sahrens * directory. Change the entry name as indicated. 2268fa9e4066Sahrens * 2269fa9e4066Sahrens * IN: sdvp - Source directory containing the "old entry". 2270fa9e4066Sahrens * snm - Old entry name. 2271fa9e4066Sahrens * tdvp - Target directory to contain the "new entry". 2272fa9e4066Sahrens * tnm - New entry name. 2273fa9e4066Sahrens * cr - credentials of caller. 2274fa9e4066Sahrens * 2275fa9e4066Sahrens * RETURN: 0 if success 2276fa9e4066Sahrens * error code if failure 2277fa9e4066Sahrens * 2278fa9e4066Sahrens * Timestamps: 2279fa9e4066Sahrens * sdvp,tdvp - ctime|mtime updated 2280fa9e4066Sahrens */ 2281fa9e4066Sahrens static int 2282fa9e4066Sahrens zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr) 2283fa9e4066Sahrens { 2284fa9e4066Sahrens znode_t *tdzp, *szp, *tzp; 2285fa9e4066Sahrens znode_t *sdzp = VTOZ(sdvp); 2286fa9e4066Sahrens zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 2287fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2288fa9e4066Sahrens vnode_t *realvp; 2289fa9e4066Sahrens zfs_dirlock_t *sdl, *tdl; 2290fa9e4066Sahrens dmu_tx_t *tx; 2291fa9e4066Sahrens zfs_zlock_t *zl; 2292fa9e4066Sahrens int cmp, serr, terr, error; 2293fa9e4066Sahrens 2294fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2295fa9e4066Sahrens 2296fa9e4066Sahrens /* 2297fa9e4066Sahrens * Make sure we have the real vp for the target directory. 2298fa9e4066Sahrens */ 2299fa9e4066Sahrens if (VOP_REALVP(tdvp, &realvp) == 0) 2300fa9e4066Sahrens tdvp = realvp; 2301fa9e4066Sahrens 2302fa9e4066Sahrens if (tdvp->v_vfsp != sdvp->v_vfsp) { 2303fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2304fa9e4066Sahrens return (EXDEV); 2305fa9e4066Sahrens } 2306fa9e4066Sahrens 2307fa9e4066Sahrens tdzp = VTOZ(tdvp); 2308fa9e4066Sahrens top: 2309fa9e4066Sahrens szp = NULL; 2310fa9e4066Sahrens tzp = NULL; 2311fa9e4066Sahrens zl = NULL; 2312fa9e4066Sahrens 2313fa9e4066Sahrens /* 2314fa9e4066Sahrens * This is to prevent the creation of links into attribute space 2315fa9e4066Sahrens * by renaming a linked file into/outof an attribute directory. 2316fa9e4066Sahrens * See the comment in zfs_link() for why this is considered bad. 2317fa9e4066Sahrens */ 2318fa9e4066Sahrens if ((tdzp->z_phys->zp_flags & ZFS_XATTR) != 2319fa9e4066Sahrens (sdzp->z_phys->zp_flags & ZFS_XATTR)) { 2320fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2321fa9e4066Sahrens return (EINVAL); 2322fa9e4066Sahrens } 2323fa9e4066Sahrens 2324fa9e4066Sahrens /* 2325fa9e4066Sahrens * Lock source and target directory entries. To prevent deadlock, 2326fa9e4066Sahrens * a lock ordering must be defined. We lock the directory with 2327fa9e4066Sahrens * the smallest object id first, or if it's a tie, the one with 2328fa9e4066Sahrens * the lexically first name. 2329fa9e4066Sahrens */ 2330fa9e4066Sahrens if (sdzp->z_id < tdzp->z_id) { 2331fa9e4066Sahrens cmp = -1; 2332fa9e4066Sahrens } else if (sdzp->z_id > tdzp->z_id) { 2333fa9e4066Sahrens cmp = 1; 2334fa9e4066Sahrens } else { 2335fa9e4066Sahrens cmp = strcmp(snm, tnm); 2336fa9e4066Sahrens if (cmp == 0) { 2337fa9e4066Sahrens /* 2338fa9e4066Sahrens * POSIX: "If the old argument and the new argument 2339fa9e4066Sahrens * both refer to links to the same existing file, 2340fa9e4066Sahrens * the rename() function shall return successfully 2341fa9e4066Sahrens * and perform no other action." 2342fa9e4066Sahrens */ 2343fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2344fa9e4066Sahrens return (0); 2345fa9e4066Sahrens } 2346fa9e4066Sahrens } 2347fa9e4066Sahrens if (cmp < 0) { 2348fa9e4066Sahrens serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, ZEXISTS); 2349fa9e4066Sahrens terr = zfs_dirent_lock(&tdl, tdzp, tnm, &tzp, 0); 2350fa9e4066Sahrens } else { 2351fa9e4066Sahrens terr = zfs_dirent_lock(&tdl, tdzp, tnm, &tzp, 0); 2352fa9e4066Sahrens serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, ZEXISTS); 2353fa9e4066Sahrens } 2354fa9e4066Sahrens 2355fa9e4066Sahrens if (serr) { 2356fa9e4066Sahrens /* 2357fa9e4066Sahrens * Source entry invalid or not there. 2358fa9e4066Sahrens */ 2359fa9e4066Sahrens if (!terr) { 2360fa9e4066Sahrens zfs_dirent_unlock(tdl); 2361fa9e4066Sahrens if (tzp) 2362fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 2363fa9e4066Sahrens } 2364fa9e4066Sahrens if (strcmp(snm, "..") == 0) 2365fa9e4066Sahrens serr = EINVAL; 2366fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2367fa9e4066Sahrens return (serr); 2368fa9e4066Sahrens } 2369fa9e4066Sahrens if (terr) { 2370fa9e4066Sahrens zfs_dirent_unlock(sdl); 2371fa9e4066Sahrens VN_RELE(ZTOV(szp)); 2372fa9e4066Sahrens if (strcmp(tnm, "..") == 0) 2373fa9e4066Sahrens terr = EINVAL; 2374fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2375fa9e4066Sahrens return (terr); 2376fa9e4066Sahrens } 2377fa9e4066Sahrens 2378fa9e4066Sahrens /* 2379fa9e4066Sahrens * Must have write access at the source to remove the old entry 2380fa9e4066Sahrens * and write access at the target to create the new entry. 2381fa9e4066Sahrens * Note that if target and source are the same, this can be 2382fa9e4066Sahrens * done in a single check. 2383fa9e4066Sahrens */ 2384fa9e4066Sahrens 2385fa9e4066Sahrens if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 2386fa9e4066Sahrens goto out; 2387fa9e4066Sahrens 2388fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 2389fa9e4066Sahrens /* 2390fa9e4066Sahrens * Check to make sure rename is valid. 2391fa9e4066Sahrens * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 2392fa9e4066Sahrens */ 2393fa9e4066Sahrens if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 2394fa9e4066Sahrens goto out; 2395fa9e4066Sahrens } 2396fa9e4066Sahrens 2397fa9e4066Sahrens /* 2398fa9e4066Sahrens * Does target exist? 2399fa9e4066Sahrens */ 2400fa9e4066Sahrens if (tzp) { 2401fa9e4066Sahrens /* 2402fa9e4066Sahrens * Source and target must be the same type. 2403fa9e4066Sahrens */ 2404fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 2405fa9e4066Sahrens if (ZTOV(tzp)->v_type != VDIR) { 2406fa9e4066Sahrens error = ENOTDIR; 2407fa9e4066Sahrens goto out; 2408fa9e4066Sahrens } 2409fa9e4066Sahrens } else { 2410fa9e4066Sahrens if (ZTOV(tzp)->v_type == VDIR) { 2411fa9e4066Sahrens error = EISDIR; 2412fa9e4066Sahrens goto out; 2413fa9e4066Sahrens } 2414fa9e4066Sahrens } 2415fa9e4066Sahrens /* 2416fa9e4066Sahrens * POSIX dictates that when the source and target 2417fa9e4066Sahrens * entries refer to the same file object, rename 2418fa9e4066Sahrens * must do nothing and exit without error. 2419fa9e4066Sahrens */ 2420fa9e4066Sahrens if (szp->z_id == tzp->z_id) { 2421fa9e4066Sahrens error = 0; 2422fa9e4066Sahrens goto out; 2423fa9e4066Sahrens } 2424fa9e4066Sahrens } 2425fa9e4066Sahrens 2426fa9e4066Sahrens vnevent_rename_src(ZTOV(szp)); 2427fa9e4066Sahrens if (tzp) 2428fa9e4066Sahrens vnevent_rename_dest(ZTOV(tzp)); 2429fa9e4066Sahrens 2430fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2431fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */ 2432fa9e4066Sahrens dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */ 2433ea8dc4b6Seschrock dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); 2434ea8dc4b6Seschrock dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); 2435ea8dc4b6Seschrock if (sdzp != tdzp) 2436fa9e4066Sahrens dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */ 2437ea8dc4b6Seschrock if (tzp) 2438ea8dc4b6Seschrock dmu_tx_hold_bonus(tx, tzp->z_id); /* parent changes */ 2439893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 2440fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 2441fa9e4066Sahrens if (error) { 2442fa9e4066Sahrens if (zl != NULL) 2443fa9e4066Sahrens zfs_rename_unlock(&zl); 2444fa9e4066Sahrens zfs_dirent_unlock(sdl); 2445fa9e4066Sahrens zfs_dirent_unlock(tdl); 2446fa9e4066Sahrens VN_RELE(ZTOV(szp)); 2447fa9e4066Sahrens if (tzp) 2448fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 2449fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 24508a2f1b91Sahrens dmu_tx_wait(tx); 24518a2f1b91Sahrens dmu_tx_abort(tx); 2452fa9e4066Sahrens goto top; 2453fa9e4066Sahrens } 24548a2f1b91Sahrens dmu_tx_abort(tx); 2455fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2456fa9e4066Sahrens return (error); 2457fa9e4066Sahrens } 2458fa9e4066Sahrens 2459fa9e4066Sahrens if (tzp) /* Attempt to remove the existing target */ 2460fa9e4066Sahrens error = zfs_link_destroy(tdl, tzp, tx, 0, NULL); 2461fa9e4066Sahrens 2462fa9e4066Sahrens if (error == 0) { 2463fa9e4066Sahrens error = zfs_link_create(tdl, szp, tx, ZRENAMING); 2464fa9e4066Sahrens if (error == 0) { 2465fa9e4066Sahrens error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 2466fa9e4066Sahrens ASSERT(error == 0); 2467b19a79ecSperrin zfs_log_rename(zilog, tx, TX_RENAME, sdzp, 2468b19a79ecSperrin sdl->dl_name, tdzp, tdl->dl_name, szp); 2469fa9e4066Sahrens } 2470fa9e4066Sahrens } 2471fa9e4066Sahrens 2472fa9e4066Sahrens dmu_tx_commit(tx); 2473fa9e4066Sahrens out: 2474fa9e4066Sahrens if (zl != NULL) 2475fa9e4066Sahrens zfs_rename_unlock(&zl); 2476fa9e4066Sahrens 2477fa9e4066Sahrens zfs_dirent_unlock(sdl); 2478fa9e4066Sahrens zfs_dirent_unlock(tdl); 2479fa9e4066Sahrens 2480fa9e4066Sahrens VN_RELE(ZTOV(szp)); 2481fa9e4066Sahrens if (tzp) 2482fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 2483fa9e4066Sahrens 2484fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2485fa9e4066Sahrens return (error); 2486fa9e4066Sahrens } 2487fa9e4066Sahrens 2488fa9e4066Sahrens /* 2489fa9e4066Sahrens * Insert the indicated symbolic reference entry into the directory. 2490fa9e4066Sahrens * 2491fa9e4066Sahrens * IN: dvp - Directory to contain new symbolic link. 2492fa9e4066Sahrens * link - Name for new symlink entry. 2493fa9e4066Sahrens * vap - Attributes of new entry. 2494fa9e4066Sahrens * target - Target path of new symlink. 2495fa9e4066Sahrens * cr - credentials of caller. 2496fa9e4066Sahrens * 2497fa9e4066Sahrens * RETURN: 0 if success 2498fa9e4066Sahrens * error code if failure 2499fa9e4066Sahrens * 2500fa9e4066Sahrens * Timestamps: 2501fa9e4066Sahrens * dvp - ctime|mtime updated 2502fa9e4066Sahrens */ 2503fa9e4066Sahrens static int 2504fa9e4066Sahrens zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr) 2505fa9e4066Sahrens { 2506fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 2507fa9e4066Sahrens zfs_dirlock_t *dl; 2508fa9e4066Sahrens dmu_tx_t *tx; 2509fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2510fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2511fa9e4066Sahrens uint64_t zoid; 2512fa9e4066Sahrens int len = strlen(link); 2513fa9e4066Sahrens int error; 2514fa9e4066Sahrens 2515fa9e4066Sahrens ASSERT(vap->va_type == VLNK); 2516fa9e4066Sahrens 2517fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2518fa9e4066Sahrens top: 2519fa9e4066Sahrens if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { 2520fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2521fa9e4066Sahrens return (error); 2522fa9e4066Sahrens } 2523fa9e4066Sahrens 2524fa9e4066Sahrens if (len > MAXPATHLEN) { 2525fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2526fa9e4066Sahrens return (ENAMETOOLONG); 2527fa9e4066Sahrens } 2528fa9e4066Sahrens 2529fa9e4066Sahrens /* 2530fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 2531fa9e4066Sahrens */ 2532fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZNEW)) { 2533fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2534fa9e4066Sahrens return (error); 2535fa9e4066Sahrens } 2536fa9e4066Sahrens 2537fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2538fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 2539fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 2540ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 2541fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 2542fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE); 2543fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 2544fa9e4066Sahrens if (error) { 2545fa9e4066Sahrens zfs_dirent_unlock(dl); 2546fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 25478a2f1b91Sahrens dmu_tx_wait(tx); 25488a2f1b91Sahrens dmu_tx_abort(tx); 2549fa9e4066Sahrens goto top; 2550fa9e4066Sahrens } 25518a2f1b91Sahrens dmu_tx_abort(tx); 2552fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2553fa9e4066Sahrens return (error); 2554fa9e4066Sahrens } 2555fa9e4066Sahrens 2556fa9e4066Sahrens dmu_buf_will_dirty(dzp->z_dbuf, tx); 2557fa9e4066Sahrens 2558fa9e4066Sahrens /* 2559fa9e4066Sahrens * Create a new object for the symlink. 2560fa9e4066Sahrens * Put the link content into bonus buffer if it will fit; 2561fa9e4066Sahrens * otherwise, store it just like any other file data. 2562fa9e4066Sahrens */ 2563fa9e4066Sahrens zoid = 0; 2564fa9e4066Sahrens if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) { 2565fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, len); 2566fa9e4066Sahrens if (len != 0) 2567fa9e4066Sahrens bcopy(link, zp->z_phys + 1, len); 2568fa9e4066Sahrens } else { 2569fa9e4066Sahrens dmu_buf_t *dbp; 2570104e2ed7Sperrin 2571fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); 2572fa9e4066Sahrens 2573104e2ed7Sperrin /* 2574104e2ed7Sperrin * Nothing can access the znode yet so no locking needed 2575104e2ed7Sperrin * for growing the znode's blocksize. 2576104e2ed7Sperrin */ 2577104e2ed7Sperrin zfs_grow_blocksize(zp, len, tx); 2578fa9e4066Sahrens 2579ea8dc4b6Seschrock VERIFY(0 == dmu_buf_hold(zfsvfs->z_os, zoid, 0, FTAG, &dbp)); 2580fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 2581fa9e4066Sahrens 2582fa9e4066Sahrens ASSERT3U(len, <=, dbp->db_size); 2583fa9e4066Sahrens bcopy(link, dbp->db_data, len); 2584ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 2585fa9e4066Sahrens } 2586fa9e4066Sahrens zp->z_phys->zp_size = len; 2587fa9e4066Sahrens 2588fa9e4066Sahrens /* 2589fa9e4066Sahrens * Insert the new object into the directory. 2590fa9e4066Sahrens */ 2591fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 2592fa9e4066Sahrens out: 2593fa9e4066Sahrens if (error == 0) 2594b19a79ecSperrin zfs_log_symlink(zilog, tx, TX_SYMLINK, dzp, zp, name, link); 2595fa9e4066Sahrens 2596fa9e4066Sahrens dmu_tx_commit(tx); 2597fa9e4066Sahrens 2598fa9e4066Sahrens zfs_dirent_unlock(dl); 2599fa9e4066Sahrens 2600fa9e4066Sahrens VN_RELE(ZTOV(zp)); 2601fa9e4066Sahrens 2602fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2603fa9e4066Sahrens return (error); 2604fa9e4066Sahrens } 2605fa9e4066Sahrens 2606fa9e4066Sahrens /* 2607fa9e4066Sahrens * Return, in the buffer contained in the provided uio structure, 2608fa9e4066Sahrens * the symbolic path referred to by vp. 2609fa9e4066Sahrens * 2610fa9e4066Sahrens * IN: vp - vnode of symbolic link. 2611fa9e4066Sahrens * uoip - structure to contain the link path. 2612fa9e4066Sahrens * cr - credentials of caller. 2613fa9e4066Sahrens * 2614fa9e4066Sahrens * OUT: uio - structure to contain the link path. 2615fa9e4066Sahrens * 2616fa9e4066Sahrens * RETURN: 0 if success 2617fa9e4066Sahrens * error code if failure 2618fa9e4066Sahrens * 2619fa9e4066Sahrens * Timestamps: 2620fa9e4066Sahrens * vp - atime updated 2621fa9e4066Sahrens */ 2622fa9e4066Sahrens /* ARGSUSED */ 2623fa9e4066Sahrens static int 2624fa9e4066Sahrens zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr) 2625fa9e4066Sahrens { 2626fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2627fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2628fa9e4066Sahrens size_t bufsz; 2629fa9e4066Sahrens int error; 2630fa9e4066Sahrens 2631fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2632fa9e4066Sahrens 2633fa9e4066Sahrens bufsz = (size_t)zp->z_phys->zp_size; 2634fa9e4066Sahrens if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) { 2635fa9e4066Sahrens error = uiomove(zp->z_phys + 1, 2636fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 2637fa9e4066Sahrens } else { 2638ea8dc4b6Seschrock dmu_buf_t *dbp; 2639ea8dc4b6Seschrock error = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0, FTAG, &dbp); 2640ea8dc4b6Seschrock if (error) { 2641fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2642fa9e4066Sahrens return (error); 2643fa9e4066Sahrens } 2644fa9e4066Sahrens error = uiomove(dbp->db_data, 2645fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 2646ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 2647fa9e4066Sahrens } 2648fa9e4066Sahrens 2649fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2650fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2651fa9e4066Sahrens return (error); 2652fa9e4066Sahrens } 2653fa9e4066Sahrens 2654fa9e4066Sahrens /* 2655fa9e4066Sahrens * Insert a new entry into directory tdvp referencing svp. 2656fa9e4066Sahrens * 2657fa9e4066Sahrens * IN: tdvp - Directory to contain new entry. 2658fa9e4066Sahrens * svp - vnode of new entry. 2659fa9e4066Sahrens * name - name of new entry. 2660fa9e4066Sahrens * cr - credentials of caller. 2661fa9e4066Sahrens * 2662fa9e4066Sahrens * RETURN: 0 if success 2663fa9e4066Sahrens * error code if failure 2664fa9e4066Sahrens * 2665fa9e4066Sahrens * Timestamps: 2666fa9e4066Sahrens * tdvp - ctime|mtime updated 2667fa9e4066Sahrens * svp - ctime updated 2668fa9e4066Sahrens */ 2669fa9e4066Sahrens /* ARGSUSED */ 2670fa9e4066Sahrens static int 2671fa9e4066Sahrens zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr) 2672fa9e4066Sahrens { 2673fa9e4066Sahrens znode_t *dzp = VTOZ(tdvp); 2674fa9e4066Sahrens znode_t *tzp, *szp; 2675fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2676fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2677fa9e4066Sahrens zfs_dirlock_t *dl; 2678fa9e4066Sahrens dmu_tx_t *tx; 2679fa9e4066Sahrens vnode_t *realvp; 2680fa9e4066Sahrens int error; 2681fa9e4066Sahrens 2682fa9e4066Sahrens ASSERT(tdvp->v_type == VDIR); 2683fa9e4066Sahrens 2684fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2685fa9e4066Sahrens 2686fa9e4066Sahrens if (VOP_REALVP(svp, &realvp) == 0) 2687fa9e4066Sahrens svp = realvp; 2688fa9e4066Sahrens 2689fa9e4066Sahrens if (svp->v_vfsp != tdvp->v_vfsp) { 2690fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2691fa9e4066Sahrens return (EXDEV); 2692fa9e4066Sahrens } 2693fa9e4066Sahrens 2694fa9e4066Sahrens szp = VTOZ(svp); 2695fa9e4066Sahrens top: 2696fa9e4066Sahrens /* 2697fa9e4066Sahrens * We do not support links between attributes and non-attributes 2698fa9e4066Sahrens * because of the potential security risk of creating links 2699fa9e4066Sahrens * into "normal" file space in order to circumvent restrictions 2700fa9e4066Sahrens * imposed in attribute space. 2701fa9e4066Sahrens */ 2702fa9e4066Sahrens if ((szp->z_phys->zp_flags & ZFS_XATTR) != 2703fa9e4066Sahrens (dzp->z_phys->zp_flags & ZFS_XATTR)) { 2704fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2705fa9e4066Sahrens return (EINVAL); 2706fa9e4066Sahrens } 2707fa9e4066Sahrens 2708fa9e4066Sahrens /* 2709fa9e4066Sahrens * POSIX dictates that we return EPERM here. 2710fa9e4066Sahrens * Better choices include ENOTSUP or EISDIR. 2711fa9e4066Sahrens */ 2712fa9e4066Sahrens if (svp->v_type == VDIR) { 2713fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2714fa9e4066Sahrens return (EPERM); 2715fa9e4066Sahrens } 2716fa9e4066Sahrens 2717fa9e4066Sahrens if ((uid_t)szp->z_phys->zp_uid != crgetuid(cr) && 2718fa9e4066Sahrens secpolicy_basic_link(cr) != 0) { 2719fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2720fa9e4066Sahrens return (EPERM); 2721fa9e4066Sahrens } 2722fa9e4066Sahrens 2723fa9e4066Sahrens if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { 2724fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2725fa9e4066Sahrens return (error); 2726fa9e4066Sahrens } 2727fa9e4066Sahrens 2728fa9e4066Sahrens /* 2729fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 2730fa9e4066Sahrens */ 2731fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &tzp, ZNEW)) { 2732fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2733fa9e4066Sahrens return (error); 2734fa9e4066Sahrens } 2735fa9e4066Sahrens 2736fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2737fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); 2738ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 2739fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 2740fa9e4066Sahrens if (error) { 2741fa9e4066Sahrens zfs_dirent_unlock(dl); 2742fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 27438a2f1b91Sahrens dmu_tx_wait(tx); 27448a2f1b91Sahrens dmu_tx_abort(tx); 2745fa9e4066Sahrens goto top; 2746fa9e4066Sahrens } 27478a2f1b91Sahrens dmu_tx_abort(tx); 2748fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2749fa9e4066Sahrens return (error); 2750fa9e4066Sahrens } 2751fa9e4066Sahrens 2752fa9e4066Sahrens error = zfs_link_create(dl, szp, tx, 0); 2753fa9e4066Sahrens 2754fa9e4066Sahrens if (error == 0) 2755b19a79ecSperrin zfs_log_link(zilog, tx, TX_LINK, dzp, szp, name); 2756fa9e4066Sahrens 2757fa9e4066Sahrens dmu_tx_commit(tx); 2758fa9e4066Sahrens 2759fa9e4066Sahrens zfs_dirent_unlock(dl); 2760fa9e4066Sahrens 2761fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2762fa9e4066Sahrens return (error); 2763fa9e4066Sahrens } 2764fa9e4066Sahrens 2765fa9e4066Sahrens /* 2766fa9e4066Sahrens * zfs_null_putapage() is used when the file system has been force 2767fa9e4066Sahrens * unmounted. It just drops the pages. 2768fa9e4066Sahrens */ 2769fa9e4066Sahrens /* ARGSUSED */ 2770fa9e4066Sahrens static int 2771fa9e4066Sahrens zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 2772fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 2773fa9e4066Sahrens { 2774fa9e4066Sahrens pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 2775fa9e4066Sahrens return (0); 2776fa9e4066Sahrens } 2777fa9e4066Sahrens 277844eda4d7Smaybee /* 277944eda4d7Smaybee * Push a page out to disk, klustering if possible. 278044eda4d7Smaybee * 278144eda4d7Smaybee * IN: vp - file to push page to. 278244eda4d7Smaybee * pp - page to push. 278344eda4d7Smaybee * flags - additional flags. 278444eda4d7Smaybee * cr - credentials of caller. 278544eda4d7Smaybee * 278644eda4d7Smaybee * OUT: offp - start of range pushed. 278744eda4d7Smaybee * lenp - len of range pushed. 278844eda4d7Smaybee * 278944eda4d7Smaybee * RETURN: 0 if success 279044eda4d7Smaybee * error code if failure 279144eda4d7Smaybee * 279244eda4d7Smaybee * NOTE: callers must have locked the page to be pushed. On 279344eda4d7Smaybee * exit, the page (and all other pages in the kluster) must be 279444eda4d7Smaybee * unlocked. 279544eda4d7Smaybee */ 2796fa9e4066Sahrens /* ARGSUSED */ 2797fa9e4066Sahrens static int 2798fa9e4066Sahrens zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 2799fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 2800fa9e4066Sahrens { 2801fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2802fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2803fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2804fa9e4066Sahrens dmu_tx_t *tx; 2805104e2ed7Sperrin rl_t *rl; 280644eda4d7Smaybee u_offset_t off, koff; 280744eda4d7Smaybee size_t len, klen; 2808fa9e4066Sahrens int err; 2809fa9e4066Sahrens 2810fa9e4066Sahrens off = pp->p_offset; 281144eda4d7Smaybee len = PAGESIZE; 281244eda4d7Smaybee /* 281344eda4d7Smaybee * If our blocksize is bigger than the page size, try to kluster 281444eda4d7Smaybee * muiltiple pages so that we write a full block (thus avoiding 281544eda4d7Smaybee * a read-modify-write). 281644eda4d7Smaybee */ 281744eda4d7Smaybee if (zp->z_blksz > PAGESIZE) { 281844eda4d7Smaybee uint64_t filesz = zp->z_phys->zp_size; 281944eda4d7Smaybee 282044eda4d7Smaybee if (!ISP2(zp->z_blksz)) { 282144eda4d7Smaybee /* Only one block in the file. */ 282244eda4d7Smaybee klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 282344eda4d7Smaybee koff = 0; 282444eda4d7Smaybee } else { 282544eda4d7Smaybee klen = zp->z_blksz; 282644eda4d7Smaybee koff = P2ALIGN(off, (u_offset_t)klen); 282744eda4d7Smaybee } 282844eda4d7Smaybee ASSERT(koff <= filesz); 282944eda4d7Smaybee if (koff + klen > filesz) 283044eda4d7Smaybee klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE); 283144eda4d7Smaybee pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); 283244eda4d7Smaybee } 283344eda4d7Smaybee ASSERT3U(btop(len), ==, btopr(len)); 283444eda4d7Smaybee top: 283544eda4d7Smaybee rl = zfs_range_lock(zp, off, len, RL_WRITER); 2836dd6ef538Smaybee /* 2837dd6ef538Smaybee * Can't push pages past end-of-file. 2838dd6ef538Smaybee */ 2839dd6ef538Smaybee if (off >= zp->z_phys->zp_size) { 284044eda4d7Smaybee /* discard all pages */ 284144eda4d7Smaybee flags |= B_INVAL; 284244eda4d7Smaybee err = 0; 284344eda4d7Smaybee goto out; 284444eda4d7Smaybee } else if (off + len > zp->z_phys->zp_size) { 284544eda4d7Smaybee int npages = btopr(zp->z_phys->zp_size - off); 284644eda4d7Smaybee page_t *trunc; 284744eda4d7Smaybee 284844eda4d7Smaybee page_list_break(&pp, &trunc, npages); 284944eda4d7Smaybee /* discard pages past end of file */ 285044eda4d7Smaybee if (trunc) 285144eda4d7Smaybee pvn_write_done(trunc, B_INVAL | flags); 285244eda4d7Smaybee len = zp->z_phys->zp_size - off; 2853dd6ef538Smaybee } 2854fa9e4066Sahrens 2855fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2856fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, off, len); 2857fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 2858fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 2859fa9e4066Sahrens if (err != 0) { 2860fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 286144eda4d7Smaybee zfs_range_unlock(rl); 28628a2f1b91Sahrens dmu_tx_wait(tx); 28638a2f1b91Sahrens dmu_tx_abort(tx); 286444eda4d7Smaybee err = 0; 2865fa9e4066Sahrens goto top; 2866fa9e4066Sahrens } 28678a2f1b91Sahrens dmu_tx_abort(tx); 2868fa9e4066Sahrens goto out; 2869fa9e4066Sahrens } 2870fa9e4066Sahrens 287144eda4d7Smaybee if (zp->z_blksz <= PAGESIZE) { 287244eda4d7Smaybee caddr_t va = ppmapin(pp, PROT_READ, (caddr_t)-1); 287344eda4d7Smaybee ASSERT3U(len, <=, PAGESIZE); 287444eda4d7Smaybee dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 287544eda4d7Smaybee ppmapout(va); 287644eda4d7Smaybee } else { 287744eda4d7Smaybee err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 287844eda4d7Smaybee } 2879fa9e4066Sahrens 288044eda4d7Smaybee if (err == 0) { 288144eda4d7Smaybee zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 2882feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, off, len, 0); 288344eda4d7Smaybee dmu_tx_commit(tx); 288444eda4d7Smaybee } 2885fa9e4066Sahrens 288644eda4d7Smaybee out: 2887c5c6ffa0Smaybee zfs_range_unlock(rl); 288844eda4d7Smaybee pvn_write_done(pp, (err ? B_ERROR : 0) | B_WRITE | flags); 2889fa9e4066Sahrens if (offp) 2890fa9e4066Sahrens *offp = off; 2891fa9e4066Sahrens if (lenp) 2892fa9e4066Sahrens *lenp = len; 2893fa9e4066Sahrens 2894fa9e4066Sahrens return (err); 2895fa9e4066Sahrens } 2896fa9e4066Sahrens 2897fa9e4066Sahrens /* 2898fa9e4066Sahrens * Copy the portion of the file indicated from pages into the file. 2899fa9e4066Sahrens * The pages are stored in a page list attached to the files vnode. 2900fa9e4066Sahrens * 2901fa9e4066Sahrens * IN: vp - vnode of file to push page data to. 2902fa9e4066Sahrens * off - position in file to put data. 2903fa9e4066Sahrens * len - amount of data to write. 2904fa9e4066Sahrens * flags - flags to control the operation. 2905fa9e4066Sahrens * cr - credentials of caller. 2906fa9e4066Sahrens * 2907fa9e4066Sahrens * RETURN: 0 if success 2908fa9e4066Sahrens * error code if failure 2909fa9e4066Sahrens * 2910fa9e4066Sahrens * Timestamps: 2911fa9e4066Sahrens * vp - ctime|mtime updated 2912fa9e4066Sahrens */ 2913fa9e4066Sahrens static int 2914fa9e4066Sahrens zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr) 2915fa9e4066Sahrens { 2916fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2917fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2918fa9e4066Sahrens page_t *pp; 2919fa9e4066Sahrens size_t io_len; 2920fa9e4066Sahrens u_offset_t io_off; 2921104e2ed7Sperrin uint64_t filesz; 2922fa9e4066Sahrens int error = 0; 2923fa9e4066Sahrens 2924fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2925fa9e4066Sahrens 2926fa9e4066Sahrens ASSERT(zp->z_dbuf_held && zp->z_phys); 2927fa9e4066Sahrens 2928fa9e4066Sahrens if (len == 0) { 2929fa9e4066Sahrens /* 2930fa9e4066Sahrens * Search the entire vp list for pages >= off. 2931fa9e4066Sahrens */ 2932fa9e4066Sahrens error = pvn_vplist_dirty(vp, (u_offset_t)off, zfs_putapage, 2933fa9e4066Sahrens flags, cr); 2934fe9cf88cSperrin goto out; 2935fa9e4066Sahrens } 2936fa9e4066Sahrens 2937104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 2938104e2ed7Sperrin if (off > filesz) { 2939fa9e4066Sahrens /* past end of file */ 2940fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2941fa9e4066Sahrens return (0); 2942fa9e4066Sahrens } 2943fa9e4066Sahrens 2944104e2ed7Sperrin len = MIN(len, filesz - off); 2945fa9e4066Sahrens 2946fe9cf88cSperrin for (io_off = off; io_off < off + len; io_off += io_len) { 2947fa9e4066Sahrens if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 2948104e2ed7Sperrin pp = page_lookup(vp, io_off, 2949*ecb72030Sperrin (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); 2950fa9e4066Sahrens } else { 2951fa9e4066Sahrens pp = page_lookup_nowait(vp, io_off, 2952*ecb72030Sperrin (flags & B_FREE) ? SE_EXCL : SE_SHARED); 2953fa9e4066Sahrens } 2954fa9e4066Sahrens 2955fa9e4066Sahrens if (pp != NULL && pvn_getdirty(pp, flags)) { 2956fa9e4066Sahrens int err; 2957fa9e4066Sahrens 2958fa9e4066Sahrens /* 2959fa9e4066Sahrens * Found a dirty page to push 2960fa9e4066Sahrens */ 2961104e2ed7Sperrin err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 2962104e2ed7Sperrin if (err) 2963fa9e4066Sahrens error = err; 2964fa9e4066Sahrens } else { 2965fa9e4066Sahrens io_len = PAGESIZE; 2966fa9e4066Sahrens } 2967fa9e4066Sahrens } 2968fe9cf88cSperrin out: 2969b19a79ecSperrin if ((flags & B_ASYNC) == 0) 2970b19a79ecSperrin zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id); 2971fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2972fa9e4066Sahrens return (error); 2973fa9e4066Sahrens } 2974fa9e4066Sahrens 2975fa9e4066Sahrens void 2976fa9e4066Sahrens zfs_inactive(vnode_t *vp, cred_t *cr) 2977fa9e4066Sahrens { 2978fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2979fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2980fa9e4066Sahrens int error; 2981fa9e4066Sahrens 2982fa9e4066Sahrens rw_enter(&zfsvfs->z_um_lock, RW_READER); 2983fa9e4066Sahrens if (zfsvfs->z_unmounted2) { 2984fa9e4066Sahrens ASSERT(zp->z_dbuf_held == 0); 2985fa9e4066Sahrens 2986fa9e4066Sahrens if (vn_has_cached_data(vp)) { 2987fa9e4066Sahrens (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, 2988fa9e4066Sahrens B_INVAL, cr); 2989fa9e4066Sahrens } 2990fa9e4066Sahrens 2991ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 2992fa9e4066Sahrens vp->v_count = 0; /* count arrives as 1 */ 2993ea8dc4b6Seschrock if (zp->z_dbuf == NULL) { 2994ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 2995ea8dc4b6Seschrock zfs_znode_free(zp); 2996ea8dc4b6Seschrock } else { 2997ea8dc4b6Seschrock mutex_exit(&zp->z_lock); 2998ea8dc4b6Seschrock } 2999fa9e4066Sahrens rw_exit(&zfsvfs->z_um_lock); 3000fa9e4066Sahrens VFS_RELE(zfsvfs->z_vfs); 3001fa9e4066Sahrens return; 3002fa9e4066Sahrens } 3003fa9e4066Sahrens 3004fa9e4066Sahrens /* 3005fa9e4066Sahrens * Attempt to push any data in the page cache. If this fails 3006fa9e4066Sahrens * we will get kicked out later in zfs_zinactive(). 3007fa9e4066Sahrens */ 30088afd4dd6Sperrin if (vn_has_cached_data(vp)) { 30098afd4dd6Sperrin (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, 30108afd4dd6Sperrin cr); 30118afd4dd6Sperrin } 3012fa9e4066Sahrens 3013893a6d32Sahrens if (zp->z_atime_dirty && zp->z_unlinked == 0) { 3014fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 3015fa9e4066Sahrens 3016fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3017fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 3018fa9e4066Sahrens if (error) { 3019fa9e4066Sahrens dmu_tx_abort(tx); 3020fa9e4066Sahrens } else { 3021fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 3022fa9e4066Sahrens mutex_enter(&zp->z_lock); 3023fa9e4066Sahrens zp->z_atime_dirty = 0; 3024fa9e4066Sahrens mutex_exit(&zp->z_lock); 3025fa9e4066Sahrens dmu_tx_commit(tx); 3026fa9e4066Sahrens } 3027fa9e4066Sahrens } 3028fa9e4066Sahrens 3029fa9e4066Sahrens zfs_zinactive(zp); 3030fa9e4066Sahrens rw_exit(&zfsvfs->z_um_lock); 3031fa9e4066Sahrens } 3032fa9e4066Sahrens 3033fa9e4066Sahrens /* 3034fa9e4066Sahrens * Bounds-check the seek operation. 3035fa9e4066Sahrens * 3036fa9e4066Sahrens * IN: vp - vnode seeking within 3037fa9e4066Sahrens * ooff - old file offset 3038fa9e4066Sahrens * noffp - pointer to new file offset 3039fa9e4066Sahrens * 3040fa9e4066Sahrens * RETURN: 0 if success 3041fa9e4066Sahrens * EINVAL if new offset invalid 3042fa9e4066Sahrens */ 3043fa9e4066Sahrens /* ARGSUSED */ 3044fa9e4066Sahrens static int 3045fa9e4066Sahrens zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp) 3046fa9e4066Sahrens { 3047fa9e4066Sahrens if (vp->v_type == VDIR) 3048fa9e4066Sahrens return (0); 3049fa9e4066Sahrens return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 3050fa9e4066Sahrens } 3051fa9e4066Sahrens 3052fa9e4066Sahrens /* 3053fa9e4066Sahrens * Pre-filter the generic locking function to trap attempts to place 3054fa9e4066Sahrens * a mandatory lock on a memory mapped file. 3055fa9e4066Sahrens */ 3056fa9e4066Sahrens static int 3057fa9e4066Sahrens zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 3058fa9e4066Sahrens flk_callback_t *flk_cbp, cred_t *cr) 3059fa9e4066Sahrens { 3060fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3061fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3062fa9e4066Sahrens int error; 3063fa9e4066Sahrens 3064fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3065fa9e4066Sahrens 3066fa9e4066Sahrens /* 3067ea8dc4b6Seschrock * We are following the UFS semantics with respect to mapcnt 3068ea8dc4b6Seschrock * here: If we see that the file is mapped already, then we will 3069ea8dc4b6Seschrock * return an error, but we don't worry about races between this 3070ea8dc4b6Seschrock * function and zfs_map(). 3071fa9e4066Sahrens */ 3072ea8dc4b6Seschrock if (zp->z_mapcnt > 0 && MANDMODE((mode_t)zp->z_phys->zp_mode)) { 3073fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3074fa9e4066Sahrens return (EAGAIN); 3075fa9e4066Sahrens } 3076fa9e4066Sahrens error = fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr); 3077fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3078fa9e4066Sahrens return (error); 3079fa9e4066Sahrens } 3080fa9e4066Sahrens 3081fa9e4066Sahrens /* 3082fa9e4066Sahrens * If we can't find a page in the cache, we will create a new page 3083fa9e4066Sahrens * and fill it with file data. For efficiency, we may try to fill 3084104e2ed7Sperrin * multiple pages at once (klustering). 3085fa9e4066Sahrens */ 3086fa9e4066Sahrens static int 3087fa9e4066Sahrens zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 3088fa9e4066Sahrens caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 3089fa9e4066Sahrens { 3090fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3091fa9e4066Sahrens page_t *pp, *cur_pp; 3092fa9e4066Sahrens objset_t *os = zp->z_zfsvfs->z_os; 3093fa9e4066Sahrens caddr_t va; 3094fa9e4066Sahrens u_offset_t io_off, total; 3095fa9e4066Sahrens uint64_t oid = zp->z_id; 3096fa9e4066Sahrens size_t io_len; 3097104e2ed7Sperrin uint64_t filesz; 3098fa9e4066Sahrens int err; 3099fa9e4066Sahrens 3100fa9e4066Sahrens /* 3101fa9e4066Sahrens * If we are only asking for a single page don't bother klustering. 3102fa9e4066Sahrens */ 3103104e2ed7Sperrin filesz = zp->z_phys->zp_size; /* get consistent copy of zp_size */ 310444eda4d7Smaybee if (off >= filesz) 310544eda4d7Smaybee return (EFAULT); 310644eda4d7Smaybee if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 3107fa9e4066Sahrens io_off = off; 3108fa9e4066Sahrens io_len = PAGESIZE; 3109fa9e4066Sahrens pp = page_create_va(vp, io_off, io_len, PG_WAIT, seg, addr); 3110fa9e4066Sahrens } else { 3111fa9e4066Sahrens /* 3112fa9e4066Sahrens * Try to fill a kluster of pages (a blocks worth). 3113fa9e4066Sahrens */ 3114fa9e4066Sahrens size_t klen; 3115fa9e4066Sahrens u_offset_t koff; 3116fa9e4066Sahrens 3117fa9e4066Sahrens if (!ISP2(zp->z_blksz)) { 3118fa9e4066Sahrens /* Only one block in the file. */ 3119fa9e4066Sahrens klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 3120fa9e4066Sahrens koff = 0; 3121fa9e4066Sahrens } else { 3122574679b5Sgw /* 3123574679b5Sgw * It would be ideal to align our offset to the 3124574679b5Sgw * blocksize but doing so has resulted in some 3125574679b5Sgw * strange application crashes. For now, we 3126574679b5Sgw * leave the offset as is and only adjust the 3127574679b5Sgw * length if we are off the end of the file. 3128574679b5Sgw */ 3129574679b5Sgw koff = off; 3130fa9e4066Sahrens klen = plsz; 3131fa9e4066Sahrens } 3132dd6ef538Smaybee ASSERT(koff <= filesz); 3133dd6ef538Smaybee if (koff + klen > filesz) 3134dd6ef538Smaybee klen = P2ROUNDUP(filesz, (uint64_t)PAGESIZE) - koff; 313544eda4d7Smaybee ASSERT3U(off, >=, koff); 313644eda4d7Smaybee ASSERT3U(off, <, koff + klen); 3137fa9e4066Sahrens pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 3138*ecb72030Sperrin &io_len, koff, klen, 0); 3139fa9e4066Sahrens } 3140fa9e4066Sahrens if (pp == NULL) { 3141fa9e4066Sahrens /* 3142fa9e4066Sahrens * Some other thread entered the page before us. 3143fa9e4066Sahrens * Return to zfs_getpage to retry the lookup. 3144fa9e4066Sahrens */ 3145fa9e4066Sahrens *pl = NULL; 3146fa9e4066Sahrens return (0); 3147fa9e4066Sahrens } 3148fa9e4066Sahrens 3149fa9e4066Sahrens /* 3150fa9e4066Sahrens * Fill the pages in the kluster. 3151fa9e4066Sahrens */ 3152fa9e4066Sahrens cur_pp = pp; 3153fa9e4066Sahrens for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 315444eda4d7Smaybee ASSERT3U(io_off, ==, cur_pp->p_offset); 3155fa9e4066Sahrens va = ppmapin(cur_pp, PROT_READ | PROT_WRITE, (caddr_t)-1); 3156ea8dc4b6Seschrock err = dmu_read(os, oid, io_off, PAGESIZE, va); 3157fa9e4066Sahrens ppmapout(va); 3158fa9e4066Sahrens if (err) { 3159fa9e4066Sahrens /* On error, toss the entire kluster */ 3160fa9e4066Sahrens pvn_read_done(pp, B_ERROR); 3161fa9e4066Sahrens return (err); 3162fa9e4066Sahrens } 3163fa9e4066Sahrens cur_pp = cur_pp->p_next; 3164fa9e4066Sahrens } 3165fa9e4066Sahrens out: 3166fa9e4066Sahrens /* 3167fa9e4066Sahrens * Fill in the page list array from the kluster. If 3168fa9e4066Sahrens * there are too many pages in the kluster, return 3169fa9e4066Sahrens * as many pages as possible starting from the desired 3170fa9e4066Sahrens * offset `off'. 3171fa9e4066Sahrens * NOTE: the page list will always be null terminated. 3172fa9e4066Sahrens */ 3173fa9e4066Sahrens pvn_plist_init(pp, pl, plsz, off, io_len, rw); 3174fa9e4066Sahrens 3175fa9e4066Sahrens return (0); 3176fa9e4066Sahrens } 3177fa9e4066Sahrens 3178fa9e4066Sahrens /* 3179fa9e4066Sahrens * Return pointers to the pages for the file region [off, off + len] 3180fa9e4066Sahrens * in the pl array. If plsz is greater than len, this function may 3181fa9e4066Sahrens * also return page pointers from before or after the specified 3182fa9e4066Sahrens * region (i.e. some region [off', off' + plsz]). These additional 3183fa9e4066Sahrens * pages are only returned if they are already in the cache, or were 3184fa9e4066Sahrens * created as part of a klustered read. 3185fa9e4066Sahrens * 3186fa9e4066Sahrens * IN: vp - vnode of file to get data from. 3187fa9e4066Sahrens * off - position in file to get data from. 3188fa9e4066Sahrens * len - amount of data to retrieve. 3189fa9e4066Sahrens * plsz - length of provided page list. 3190fa9e4066Sahrens * seg - segment to obtain pages for. 3191fa9e4066Sahrens * addr - virtual address of fault. 3192fa9e4066Sahrens * rw - mode of created pages. 3193fa9e4066Sahrens * cr - credentials of caller. 3194fa9e4066Sahrens * 3195fa9e4066Sahrens * OUT: protp - protection mode of created pages. 3196fa9e4066Sahrens * pl - list of pages created. 3197fa9e4066Sahrens * 3198fa9e4066Sahrens * RETURN: 0 if success 3199fa9e4066Sahrens * error code if failure 3200fa9e4066Sahrens * 3201fa9e4066Sahrens * Timestamps: 3202fa9e4066Sahrens * vp - atime updated 3203fa9e4066Sahrens */ 3204fa9e4066Sahrens /* ARGSUSED */ 3205fa9e4066Sahrens static int 3206fa9e4066Sahrens zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 3207fa9e4066Sahrens page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 3208fa9e4066Sahrens enum seg_rw rw, cred_t *cr) 3209fa9e4066Sahrens { 3210fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3211fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3212fa9e4066Sahrens page_t *pp, **pl0 = pl; 3213fe2f476aSperrin int need_unlock = 0, err = 0; 3214fe2f476aSperrin offset_t orig_off; 3215fa9e4066Sahrens 3216fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3217fa9e4066Sahrens 3218fa9e4066Sahrens if (protp) 3219fa9e4066Sahrens *protp = PROT_ALL; 3220fa9e4066Sahrens 3221fa9e4066Sahrens ASSERT(zp->z_dbuf_held && zp->z_phys); 3222fa9e4066Sahrens 3223fa9e4066Sahrens /* no faultahead (for now) */ 3224fa9e4066Sahrens if (pl == NULL) { 3225fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3226fa9e4066Sahrens return (0); 3227fa9e4066Sahrens } 3228fa9e4066Sahrens 3229fa9e4066Sahrens /* can't fault past EOF */ 3230fa9e4066Sahrens if (off >= zp->z_phys->zp_size) { 3231fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3232fa9e4066Sahrens return (EFAULT); 3233fa9e4066Sahrens } 3234fe2f476aSperrin orig_off = off; 3235fa9e4066Sahrens 3236fa9e4066Sahrens /* 3237fa9e4066Sahrens * If we already own the lock, then we must be page faulting 3238fa9e4066Sahrens * in the middle of a write to this file (i.e., we are writing 3239fa9e4066Sahrens * to this file using data from a mapped region of the file). 3240fa9e4066Sahrens */ 3241fe2f476aSperrin if (rw_owner(&zp->z_map_lock) != curthread) { 3242fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 3243fa9e4066Sahrens need_unlock = TRUE; 3244fa9e4066Sahrens } 3245fa9e4066Sahrens 3246fa9e4066Sahrens /* 3247fa9e4066Sahrens * Loop through the requested range [off, off + len] looking 3248fa9e4066Sahrens * for pages. If we don't find a page, we will need to create 3249fa9e4066Sahrens * a new page and fill it with data from the file. 3250fa9e4066Sahrens */ 3251fa9e4066Sahrens while (len > 0) { 3252fa9e4066Sahrens if (plsz < PAGESIZE) 3253fa9e4066Sahrens break; 3254fa9e4066Sahrens if (pp = page_lookup(vp, off, SE_SHARED)) { 3255fa9e4066Sahrens *pl++ = pp; 3256fa9e4066Sahrens off += PAGESIZE; 3257fa9e4066Sahrens addr += PAGESIZE; 3258fa9e4066Sahrens len -= PAGESIZE; 3259fa9e4066Sahrens plsz -= PAGESIZE; 3260fa9e4066Sahrens } else { 3261fa9e4066Sahrens err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw); 3262fe2f476aSperrin if (err) 3263fe2f476aSperrin goto out; 3264fa9e4066Sahrens /* 3265fa9e4066Sahrens * klustering may have changed our region 3266fa9e4066Sahrens * to be block aligned. 3267fa9e4066Sahrens */ 3268fa9e4066Sahrens if (((pp = *pl) != 0) && (off != pp->p_offset)) { 3269fa9e4066Sahrens int delta = off - pp->p_offset; 3270fa9e4066Sahrens len += delta; 3271fa9e4066Sahrens off -= delta; 3272fa9e4066Sahrens addr -= delta; 3273fa9e4066Sahrens } 3274fa9e4066Sahrens while (*pl) { 3275fa9e4066Sahrens pl++; 3276fa9e4066Sahrens off += PAGESIZE; 3277fa9e4066Sahrens addr += PAGESIZE; 3278fa9e4066Sahrens plsz -= PAGESIZE; 3279fa9e4066Sahrens if (len > PAGESIZE) 3280fa9e4066Sahrens len -= PAGESIZE; 3281fa9e4066Sahrens else 3282fa9e4066Sahrens len = 0; 3283fa9e4066Sahrens } 3284fa9e4066Sahrens } 3285fa9e4066Sahrens } 3286fa9e4066Sahrens 3287fa9e4066Sahrens /* 3288fa9e4066Sahrens * Fill out the page array with any pages already in the cache. 3289fa9e4066Sahrens */ 3290fa9e4066Sahrens while (plsz > 0) { 3291fa9e4066Sahrens pp = page_lookup_nowait(vp, off, SE_SHARED); 3292fa9e4066Sahrens if (pp == NULL) 3293fa9e4066Sahrens break; 3294fa9e4066Sahrens *pl++ = pp; 3295fa9e4066Sahrens off += PAGESIZE; 3296fa9e4066Sahrens plsz -= PAGESIZE; 3297fa9e4066Sahrens } 3298fa9e4066Sahrens 3299fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 3300fa9e4066Sahrens out: 3301fe2f476aSperrin /* 3302fe2f476aSperrin * We can't grab the range lock for the page as reader which would 3303fe2f476aSperrin * stop truncation as this leads to deadlock. So we need to recheck 3304fe2f476aSperrin * the file size. 3305fe2f476aSperrin */ 3306fe2f476aSperrin if (orig_off >= zp->z_phys->zp_size) 3307fe2f476aSperrin err = EFAULT; 3308fe2f476aSperrin if (err) { 3309fe2f476aSperrin /* 3310fe2f476aSperrin * Release any pages we have previously locked. 3311fe2f476aSperrin */ 3312fe2f476aSperrin while (pl > pl0) 3313fe2f476aSperrin page_unlock(*--pl); 3314fe2f476aSperrin } 3315fe2f476aSperrin 3316fa9e4066Sahrens *pl = NULL; 3317fa9e4066Sahrens 3318fa9e4066Sahrens if (need_unlock) 3319fa9e4066Sahrens rw_exit(&zp->z_map_lock); 3320fa9e4066Sahrens 3321fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3322fa9e4066Sahrens return (err); 3323fa9e4066Sahrens } 3324fa9e4066Sahrens 3325ea8dc4b6Seschrock /* 3326ea8dc4b6Seschrock * Request a memory map for a section of a file. This code interacts 3327ea8dc4b6Seschrock * with common code and the VM system as follows: 3328ea8dc4b6Seschrock * 3329ea8dc4b6Seschrock * common code calls mmap(), which ends up in smmap_common() 3330ea8dc4b6Seschrock * 3331ea8dc4b6Seschrock * this calls VOP_MAP(), which takes you into (say) zfs 3332ea8dc4b6Seschrock * 3333ea8dc4b6Seschrock * zfs_map() calls as_map(), passing segvn_create() as the callback 3334ea8dc4b6Seschrock * 3335ea8dc4b6Seschrock * segvn_create() creates the new segment and calls VOP_ADDMAP() 3336ea8dc4b6Seschrock * 3337ea8dc4b6Seschrock * zfs_addmap() updates z_mapcnt 3338ea8dc4b6Seschrock */ 3339fa9e4066Sahrens static int 3340fa9e4066Sahrens zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 3341fa9e4066Sahrens size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr) 3342fa9e4066Sahrens { 3343fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3344fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3345fa9e4066Sahrens segvn_crargs_t vn_a; 3346fa9e4066Sahrens int error; 3347fa9e4066Sahrens 3348fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3349fa9e4066Sahrens 3350fa9e4066Sahrens if (vp->v_flag & VNOMAP) { 3351fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3352fa9e4066Sahrens return (ENOSYS); 3353fa9e4066Sahrens } 3354fa9e4066Sahrens 3355fa9e4066Sahrens if (off < 0 || len > MAXOFFSET_T - off) { 3356fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3357fa9e4066Sahrens return (ENXIO); 3358fa9e4066Sahrens } 3359fa9e4066Sahrens 3360fa9e4066Sahrens if (vp->v_type != VREG) { 3361fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3362fa9e4066Sahrens return (ENODEV); 3363fa9e4066Sahrens } 3364fa9e4066Sahrens 3365fa9e4066Sahrens /* 3366fa9e4066Sahrens * If file is locked, disallow mapping. 3367fa9e4066Sahrens */ 3368ea8dc4b6Seschrock if (MANDMODE((mode_t)zp->z_phys->zp_mode) && vn_has_flocks(vp)) { 3369ea8dc4b6Seschrock ZFS_EXIT(zfsvfs); 3370ea8dc4b6Seschrock return (EAGAIN); 3371fa9e4066Sahrens } 3372fa9e4066Sahrens 3373fa9e4066Sahrens as_rangelock(as); 3374fa9e4066Sahrens if ((flags & MAP_FIXED) == 0) { 3375fa9e4066Sahrens map_addr(addrp, len, off, 1, flags); 3376fa9e4066Sahrens if (*addrp == NULL) { 3377fa9e4066Sahrens as_rangeunlock(as); 3378fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3379fa9e4066Sahrens return (ENOMEM); 3380fa9e4066Sahrens } 3381fa9e4066Sahrens } else { 3382fa9e4066Sahrens /* 3383fa9e4066Sahrens * User specified address - blow away any previous mappings 3384fa9e4066Sahrens */ 3385fa9e4066Sahrens (void) as_unmap(as, *addrp, len); 3386fa9e4066Sahrens } 3387fa9e4066Sahrens 3388fa9e4066Sahrens vn_a.vp = vp; 3389fa9e4066Sahrens vn_a.offset = (u_offset_t)off; 3390fa9e4066Sahrens vn_a.type = flags & MAP_TYPE; 3391fa9e4066Sahrens vn_a.prot = prot; 3392fa9e4066Sahrens vn_a.maxprot = maxprot; 3393fa9e4066Sahrens vn_a.cred = cr; 3394fa9e4066Sahrens vn_a.amp = NULL; 3395fa9e4066Sahrens vn_a.flags = flags & ~MAP_TYPE; 33964944b02eSkchow vn_a.szc = 0; 33974944b02eSkchow vn_a.lgrp_mem_policy_flags = 0; 3398fa9e4066Sahrens 3399fa9e4066Sahrens error = as_map(as, *addrp, len, segvn_create, &vn_a); 3400fa9e4066Sahrens 3401fa9e4066Sahrens as_rangeunlock(as); 3402fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3403fa9e4066Sahrens return (error); 3404fa9e4066Sahrens } 3405fa9e4066Sahrens 3406fa9e4066Sahrens /* ARGSUSED */ 3407fa9e4066Sahrens static int 3408fa9e4066Sahrens zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 3409fa9e4066Sahrens size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr) 3410fa9e4066Sahrens { 3411ea8dc4b6Seschrock uint64_t pages = btopr(len); 3412ea8dc4b6Seschrock 3413ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 3414fa9e4066Sahrens return (0); 3415fa9e4066Sahrens } 3416fa9e4066Sahrens 3417b468a217Seschrock /* 3418b468a217Seschrock * The reason we push dirty pages as part of zfs_delmap() is so that we get a 3419b468a217Seschrock * more accurate mtime for the associated file. Since we don't have a way of 3420b468a217Seschrock * detecting when the data was actually modified, we have to resort to 3421b468a217Seschrock * heuristics. If an explicit msync() is done, then we mark the mtime when the 3422b468a217Seschrock * last page is pushed. The problem occurs when the msync() call is omitted, 3423b468a217Seschrock * which by far the most common case: 3424b468a217Seschrock * 3425b468a217Seschrock * open() 3426b468a217Seschrock * mmap() 3427b468a217Seschrock * <modify memory> 3428b468a217Seschrock * munmap() 3429b468a217Seschrock * close() 3430b468a217Seschrock * <time lapse> 3431b468a217Seschrock * putpage() via fsflush 3432b468a217Seschrock * 3433b468a217Seschrock * If we wait until fsflush to come along, we can have a modification time that 3434b468a217Seschrock * is some arbitrary point in the future. In order to prevent this in the 3435b468a217Seschrock * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is 3436b468a217Seschrock * torn down. 3437b468a217Seschrock */ 3438fa9e4066Sahrens /* ARGSUSED */ 3439fa9e4066Sahrens static int 3440fa9e4066Sahrens zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 3441fa9e4066Sahrens size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr) 3442fa9e4066Sahrens { 3443ea8dc4b6Seschrock uint64_t pages = btopr(len); 3444ea8dc4b6Seschrock 3445ea8dc4b6Seschrock ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 3446ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 3447b468a217Seschrock 3448b468a217Seschrock if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && 3449b468a217Seschrock vn_has_cached_data(vp)) 3450b468a217Seschrock (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr); 3451b468a217Seschrock 3452fa9e4066Sahrens return (0); 3453fa9e4066Sahrens } 3454fa9e4066Sahrens 3455fa9e4066Sahrens /* 3456fa9e4066Sahrens * Free or allocate space in a file. Currently, this function only 3457fa9e4066Sahrens * supports the `F_FREESP' command. However, this command is somewhat 3458fa9e4066Sahrens * misnamed, as its functionality includes the ability to allocate as 3459fa9e4066Sahrens * well as free space. 3460fa9e4066Sahrens * 3461fa9e4066Sahrens * IN: vp - vnode of file to free data in. 3462fa9e4066Sahrens * cmd - action to take (only F_FREESP supported). 3463fa9e4066Sahrens * bfp - section of file to free/alloc. 3464fa9e4066Sahrens * flag - current file open mode flags. 3465fa9e4066Sahrens * offset - current file offset. 3466fa9e4066Sahrens * cr - credentials of caller [UNUSED]. 3467fa9e4066Sahrens * 3468fa9e4066Sahrens * RETURN: 0 if success 3469fa9e4066Sahrens * error code if failure 3470fa9e4066Sahrens * 3471fa9e4066Sahrens * Timestamps: 3472fa9e4066Sahrens * vp - ctime|mtime updated 3473fa9e4066Sahrens */ 3474fa9e4066Sahrens /* ARGSUSED */ 3475fa9e4066Sahrens static int 3476fa9e4066Sahrens zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 3477fa9e4066Sahrens offset_t offset, cred_t *cr, caller_context_t *ct) 3478fa9e4066Sahrens { 3479fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3480fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3481fa9e4066Sahrens uint64_t off, len; 3482fa9e4066Sahrens int error; 3483fa9e4066Sahrens 3484fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3485fa9e4066Sahrens 3486fa9e4066Sahrens top: 3487fa9e4066Sahrens if (cmd != F_FREESP) { 3488fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3489fa9e4066Sahrens return (EINVAL); 3490fa9e4066Sahrens } 3491fa9e4066Sahrens 3492fa9e4066Sahrens if (error = convoff(vp, bfp, 0, offset)) { 3493fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3494fa9e4066Sahrens return (error); 3495fa9e4066Sahrens } 3496fa9e4066Sahrens 3497fa9e4066Sahrens if (bfp->l_len < 0) { 3498fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3499fa9e4066Sahrens return (EINVAL); 3500fa9e4066Sahrens } 3501fa9e4066Sahrens 3502fa9e4066Sahrens off = bfp->l_start; 3503104e2ed7Sperrin len = bfp->l_len; /* 0 means from off to end of file */ 3504104e2ed7Sperrin 35055730cc9aSmaybee do { 35065730cc9aSmaybee error = zfs_freesp(zp, off, len, flag, TRUE); 35078a2f1b91Sahrens /* NB: we already did dmu_tx_wait() if necessary */ 35085730cc9aSmaybee } while (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT); 3509fa9e4066Sahrens 3510fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3511fa9e4066Sahrens return (error); 3512fa9e4066Sahrens } 3513fa9e4066Sahrens 3514fa9e4066Sahrens static int 3515fa9e4066Sahrens zfs_fid(vnode_t *vp, fid_t *fidp) 3516fa9e4066Sahrens { 3517fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3518fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3519fa9e4066Sahrens uint32_t gen = (uint32_t)zp->z_phys->zp_gen; 3520fa9e4066Sahrens uint64_t object = zp->z_id; 3521fa9e4066Sahrens zfid_short_t *zfid; 3522fa9e4066Sahrens int size, i; 3523fa9e4066Sahrens 3524fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3525fa9e4066Sahrens 3526fa9e4066Sahrens size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 3527fa9e4066Sahrens if (fidp->fid_len < size) { 3528fa9e4066Sahrens fidp->fid_len = size; 35290f2dc02eSek ZFS_EXIT(zfsvfs); 3530fa9e4066Sahrens return (ENOSPC); 3531fa9e4066Sahrens } 3532fa9e4066Sahrens 3533fa9e4066Sahrens zfid = (zfid_short_t *)fidp; 3534fa9e4066Sahrens 3535fa9e4066Sahrens zfid->zf_len = size; 3536fa9e4066Sahrens 3537fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_object); i++) 3538fa9e4066Sahrens zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 3539fa9e4066Sahrens 3540fa9e4066Sahrens /* Must have a non-zero generation number to distinguish from .zfs */ 3541fa9e4066Sahrens if (gen == 0) 3542fa9e4066Sahrens gen = 1; 3543fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_gen); i++) 3544fa9e4066Sahrens zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 3545fa9e4066Sahrens 3546fa9e4066Sahrens if (size == LONG_FID_LEN) { 3547fa9e4066Sahrens uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 3548fa9e4066Sahrens zfid_long_t *zlfid; 3549fa9e4066Sahrens 3550fa9e4066Sahrens zlfid = (zfid_long_t *)fidp; 3551fa9e4066Sahrens 3552fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setid); i++) 3553fa9e4066Sahrens zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 3554fa9e4066Sahrens 3555fa9e4066Sahrens /* XXX - this should be the generation number for the objset */ 3556fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 3557fa9e4066Sahrens zlfid->zf_setgen[i] = 0; 3558fa9e4066Sahrens } 3559fa9e4066Sahrens 3560fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3561fa9e4066Sahrens return (0); 3562fa9e4066Sahrens } 3563fa9e4066Sahrens 3564fa9e4066Sahrens static int 3565fa9e4066Sahrens zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr) 3566fa9e4066Sahrens { 3567fa9e4066Sahrens znode_t *zp, *xzp; 3568fa9e4066Sahrens zfsvfs_t *zfsvfs; 3569fa9e4066Sahrens zfs_dirlock_t *dl; 3570fa9e4066Sahrens int error; 3571fa9e4066Sahrens 3572fa9e4066Sahrens switch (cmd) { 3573fa9e4066Sahrens case _PC_LINK_MAX: 3574fa9e4066Sahrens *valp = ULONG_MAX; 3575fa9e4066Sahrens return (0); 3576fa9e4066Sahrens 3577fa9e4066Sahrens case _PC_FILESIZEBITS: 3578fa9e4066Sahrens *valp = 64; 3579fa9e4066Sahrens return (0); 3580fa9e4066Sahrens 3581fa9e4066Sahrens case _PC_XATTR_EXISTS: 3582fa9e4066Sahrens zp = VTOZ(vp); 3583fa9e4066Sahrens zfsvfs = zp->z_zfsvfs; 3584fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3585fa9e4066Sahrens *valp = 0; 3586fa9e4066Sahrens error = zfs_dirent_lock(&dl, zp, "", &xzp, 3587fa9e4066Sahrens ZXATTR | ZEXISTS | ZSHARED); 3588fa9e4066Sahrens if (error == 0) { 3589fa9e4066Sahrens zfs_dirent_unlock(dl); 3590fa9e4066Sahrens if (!zfs_dirempty(xzp)) 3591fa9e4066Sahrens *valp = 1; 3592fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 3593fa9e4066Sahrens } else if (error == ENOENT) { 3594fa9e4066Sahrens /* 3595fa9e4066Sahrens * If there aren't extended attributes, it's the 3596fa9e4066Sahrens * same as having zero of them. 3597fa9e4066Sahrens */ 3598fa9e4066Sahrens error = 0; 3599fa9e4066Sahrens } 3600fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3601fa9e4066Sahrens return (error); 3602fa9e4066Sahrens 3603fa9e4066Sahrens case _PC_ACL_ENABLED: 3604fa9e4066Sahrens *valp = _ACL_ACE_ENABLED; 3605fa9e4066Sahrens return (0); 3606fa9e4066Sahrens 3607fa9e4066Sahrens case _PC_MIN_HOLE_SIZE: 3608fa9e4066Sahrens *valp = (ulong_t)SPA_MINBLOCKSIZE; 3609fa9e4066Sahrens return (0); 3610fa9e4066Sahrens 3611fa9e4066Sahrens default: 3612fa9e4066Sahrens return (fs_pathconf(vp, cmd, valp, cr)); 3613fa9e4066Sahrens } 3614fa9e4066Sahrens } 3615fa9e4066Sahrens 3616fa9e4066Sahrens /*ARGSUSED*/ 3617fa9e4066Sahrens static int 3618fa9e4066Sahrens zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr) 3619fa9e4066Sahrens { 3620fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3621fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3622fa9e4066Sahrens int error; 3623fa9e4066Sahrens 3624fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3625fa9e4066Sahrens error = zfs_getacl(zp, vsecp, cr); 3626fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3627fa9e4066Sahrens 3628fa9e4066Sahrens return (error); 3629fa9e4066Sahrens } 3630fa9e4066Sahrens 3631fa9e4066Sahrens /*ARGSUSED*/ 3632fa9e4066Sahrens static int 3633fa9e4066Sahrens zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr) 3634fa9e4066Sahrens { 3635fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3636fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3637fa9e4066Sahrens int error; 3638fa9e4066Sahrens 3639fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3640fa9e4066Sahrens error = zfs_setacl(zp, vsecp, cr); 3641fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3642fa9e4066Sahrens return (error); 3643fa9e4066Sahrens } 3644fa9e4066Sahrens 3645fa9e4066Sahrens /* 3646fa9e4066Sahrens * Predeclare these here so that the compiler assumes that 3647fa9e4066Sahrens * this is an "old style" function declaration that does 3648fa9e4066Sahrens * not include arguments => we won't get type mismatch errors 3649fa9e4066Sahrens * in the initializations that follow. 3650fa9e4066Sahrens */ 3651fa9e4066Sahrens static int zfs_inval(); 3652fa9e4066Sahrens static int zfs_isdir(); 3653fa9e4066Sahrens 3654fa9e4066Sahrens static int 3655fa9e4066Sahrens zfs_inval() 3656fa9e4066Sahrens { 3657fa9e4066Sahrens return (EINVAL); 3658fa9e4066Sahrens } 3659fa9e4066Sahrens 3660fa9e4066Sahrens static int 3661fa9e4066Sahrens zfs_isdir() 3662fa9e4066Sahrens { 3663fa9e4066Sahrens return (EISDIR); 3664fa9e4066Sahrens } 3665fa9e4066Sahrens /* 3666fa9e4066Sahrens * Directory vnode operations template 3667fa9e4066Sahrens */ 3668fa9e4066Sahrens vnodeops_t *zfs_dvnodeops; 3669fa9e4066Sahrens const fs_operation_def_t zfs_dvnodeops_template[] = { 3670aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 3671aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 3672aa59c4cbSrsb VOPNAME_READ, { .error = zfs_isdir }, 3673aa59c4cbSrsb VOPNAME_WRITE, { .error = zfs_isdir }, 3674aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 3675aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 3676aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 3677aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 3678aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 3679aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 3680aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 3681aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 3682aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 3683aa59c4cbSrsb VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, 3684aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 3685aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 3686aa59c4cbSrsb VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, 3687aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 3688aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 3689aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 3690aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 3691aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 3692aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 3693aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 3694aa59c4cbSrsb NULL, NULL 3695fa9e4066Sahrens }; 3696fa9e4066Sahrens 3697fa9e4066Sahrens /* 3698fa9e4066Sahrens * Regular file vnode operations template 3699fa9e4066Sahrens */ 3700fa9e4066Sahrens vnodeops_t *zfs_fvnodeops; 3701fa9e4066Sahrens const fs_operation_def_t zfs_fvnodeops_template[] = { 3702aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 3703aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 3704aa59c4cbSrsb VOPNAME_READ, { .vop_read = zfs_read }, 3705aa59c4cbSrsb VOPNAME_WRITE, { .vop_write = zfs_write }, 3706aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 3707aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 3708aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 3709aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 3710aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 3711aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 3712aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 3713aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 3714aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 3715aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 3716aa59c4cbSrsb VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, 3717aa59c4cbSrsb VOPNAME_SPACE, { .vop_space = zfs_space }, 3718aa59c4cbSrsb VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, 3719aa59c4cbSrsb VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, 3720aa59c4cbSrsb VOPNAME_MAP, { .vop_map = zfs_map }, 3721aa59c4cbSrsb VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, 3722aa59c4cbSrsb VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, 3723aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 3724aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 3725aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 3726aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 3727aa59c4cbSrsb NULL, NULL 3728fa9e4066Sahrens }; 3729fa9e4066Sahrens 3730fa9e4066Sahrens /* 3731fa9e4066Sahrens * Symbolic link vnode operations template 3732fa9e4066Sahrens */ 3733fa9e4066Sahrens vnodeops_t *zfs_symvnodeops; 3734fa9e4066Sahrens const fs_operation_def_t zfs_symvnodeops_template[] = { 3735aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 3736aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 3737aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 3738aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 3739aa59c4cbSrsb VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, 3740aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 3741aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 3742aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 3743aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 3744aa59c4cbSrsb NULL, NULL 3745fa9e4066Sahrens }; 3746fa9e4066Sahrens 3747fa9e4066Sahrens /* 3748fa9e4066Sahrens * Extended attribute directory vnode operations template 3749fa9e4066Sahrens * This template is identical to the directory vnodes 3750fa9e4066Sahrens * operation template except for restricted operations: 3751fa9e4066Sahrens * VOP_MKDIR() 3752fa9e4066Sahrens * VOP_SYMLINK() 3753fa9e4066Sahrens * Note that there are other restrictions embedded in: 3754fa9e4066Sahrens * zfs_create() - restrict type to VREG 3755fa9e4066Sahrens * zfs_link() - no links into/out of attribute space 3756fa9e4066Sahrens * zfs_rename() - no moves into/out of attribute space 3757fa9e4066Sahrens */ 3758fa9e4066Sahrens vnodeops_t *zfs_xdvnodeops; 3759fa9e4066Sahrens const fs_operation_def_t zfs_xdvnodeops_template[] = { 3760aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 3761aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 3762aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 3763aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 3764aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 3765aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 3766aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 3767aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 3768aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 3769aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 3770aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 3771aa59c4cbSrsb VOPNAME_MKDIR, { .error = zfs_inval }, 3772aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 3773aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 3774aa59c4cbSrsb VOPNAME_SYMLINK, { .error = zfs_inval }, 3775aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 3776aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 3777aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 3778aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 3779aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 3780aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 3781aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 3782aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 3783aa59c4cbSrsb NULL, NULL 3784fa9e4066Sahrens }; 3785fa9e4066Sahrens 3786fa9e4066Sahrens /* 3787fa9e4066Sahrens * Error vnode operations template 3788fa9e4066Sahrens */ 3789fa9e4066Sahrens vnodeops_t *zfs_evnodeops; 3790fa9e4066Sahrens const fs_operation_def_t zfs_evnodeops_template[] = { 3791aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 3792aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 3793aa59c4cbSrsb NULL, NULL 3794fa9e4066Sahrens }; 3795