1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5*736b9155Smarks * Common Development and Distribution License (the "License"). 6*736b9155Smarks * 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 /* 22d2443e76Smarks * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27fa9e4066Sahrens 28fa9e4066Sahrens #include <sys/types.h> 29fa9e4066Sahrens #include <sys/param.h> 30fa9e4066Sahrens #include <sys/time.h> 31fa9e4066Sahrens #include <sys/systm.h> 32fa9e4066Sahrens #include <sys/sysmacros.h> 33fa9e4066Sahrens #include <sys/resource.h> 34fa9e4066Sahrens #include <sys/vfs.h> 35fa9e4066Sahrens #include <sys/vnode.h> 36fa9e4066Sahrens #include <sys/file.h> 37fa9e4066Sahrens #include <sys/stat.h> 38fa9e4066Sahrens #include <sys/kmem.h> 39fa9e4066Sahrens #include <sys/taskq.h> 40fa9e4066Sahrens #include <sys/uio.h> 41fa9e4066Sahrens #include <sys/vmsystm.h> 42fa9e4066Sahrens #include <sys/atomic.h> 43fa9e4066Sahrens #include <vm/seg_vn.h> 44fa9e4066Sahrens #include <vm/pvn.h> 45fa9e4066Sahrens #include <vm/as.h> 46fa9e4066Sahrens #include <sys/mman.h> 47fa9e4066Sahrens #include <sys/pathname.h> 48fa9e4066Sahrens #include <sys/cmn_err.h> 49fa9e4066Sahrens #include <sys/errno.h> 50fa9e4066Sahrens #include <sys/unistd.h> 51fa9e4066Sahrens #include <sys/zfs_vfsops.h> 52fa9e4066Sahrens #include <sys/zfs_dir.h> 53fa9e4066Sahrens #include <sys/zfs_acl.h> 54fa9e4066Sahrens #include <sys/zfs_ioctl.h> 55fa9e4066Sahrens #include <sys/fs/zfs.h> 56fa9e4066Sahrens #include <sys/dmu.h> 57fa9e4066Sahrens #include <sys/spa.h> 58fa9e4066Sahrens #include <sys/txg.h> 59fa9e4066Sahrens #include <sys/refcount.h> /* temporary for debugging purposes */ 60fa9e4066Sahrens #include <sys/dbuf.h> 61fa9e4066Sahrens #include <sys/zap.h> 62fa9e4066Sahrens #include <sys/dirent.h> 63fa9e4066Sahrens #include <sys/policy.h> 64fa9e4066Sahrens #include <sys/sunddi.h> 65fa9e4066Sahrens #include <sys/filio.h> 66fa9e4066Sahrens #include "fs/fs_subr.h" 67fa9e4066Sahrens #include <sys/zfs_ctldir.h> 68fa9e4066Sahrens 69fa9e4066Sahrens /* 70fa9e4066Sahrens * Programming rules. 71fa9e4066Sahrens * 72fa9e4066Sahrens * Each vnode op performs some logical unit of work. To do this, the ZPL must 73fa9e4066Sahrens * properly lock its in-core state, create a DMU transaction, do the work, 74fa9e4066Sahrens * record this work in the intent log (ZIL), commit the DMU transaction, 75fa9e4066Sahrens * and wait the the intent log to commit if it's is a synchronous operation. 76fa9e4066Sahrens * Morover, the vnode ops must work in both normal and log replay context. 77fa9e4066Sahrens * The ordering of events is important to avoid deadlocks and references 78fa9e4066Sahrens * to freed memory. The example below illustrates the following Big Rules: 79fa9e4066Sahrens * 80fa9e4066Sahrens * (1) A check must be made in each zfs thread for a mounted file system. 81fa9e4066Sahrens * This is done avoiding races using ZFS_ENTER(zfsvfs). 82fa9e4066Sahrens * A ZFS_EXIT(zfsvfs) is needed before all returns. 83fa9e4066Sahrens * 84fa9e4066Sahrens * (2) VN_RELE() should always be the last thing except for zil_commit() 85fa9e4066Sahrens * and ZFS_EXIT(). This is for 3 reasons: 86fa9e4066Sahrens * First, if it's the last reference, the vnode/znode 87fa9e4066Sahrens * can be freed, so the zp may point to freed memory. Second, the last 88fa9e4066Sahrens * reference will call zfs_zinactive(), which may induce a lot of work -- 89fa9e4066Sahrens * pushing cached pages (which requires z_grow_lock) and syncing out 90fa9e4066Sahrens * cached atime changes. Third, zfs_zinactive() may require a new tx, 91fa9e4066Sahrens * which could deadlock the system if you were already holding one. 92fa9e4066Sahrens * 93fa9e4066Sahrens * (3) Always pass zfsvfs->z_assign as the second argument to dmu_tx_assign(). 94fa9e4066Sahrens * In normal operation, this will be TXG_NOWAIT. During ZIL replay, 95fa9e4066Sahrens * it will be a specific txg. Either way, dmu_tx_assign() never blocks. 96fa9e4066Sahrens * This is critical because we don't want to block while holding locks. 97fa9e4066Sahrens * Note, in particular, that if a lock is sometimes acquired before 98fa9e4066Sahrens * the tx assigns, and sometimes after (e.g. z_lock), then failing to 99fa9e4066Sahrens * use a non-blocking assign can deadlock the system. The scenario: 100fa9e4066Sahrens * 101fa9e4066Sahrens * Thread A has grabbed a lock before calling dmu_tx_assign(). 102fa9e4066Sahrens * Thread B is in an already-assigned tx, and blocks for this lock. 103fa9e4066Sahrens * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 104fa9e4066Sahrens * forever, because the previous txg can't quiesce until B's tx commits. 105fa9e4066Sahrens * 106fa9e4066Sahrens * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 107fa9e4066Sahrens * then drop all locks, call txg_wait_open(), and try again. 108fa9e4066Sahrens * 109fa9e4066Sahrens * (4) If the operation succeeded, generate the intent log entry for it 110fa9e4066Sahrens * before dropping locks. This ensures that the ordering of events 111fa9e4066Sahrens * in the intent log matches the order in which they actually occurred. 112fa9e4066Sahrens * 113fa9e4066Sahrens * (5) At the end of each vnode op, the DMU tx must always commit, 114fa9e4066Sahrens * regardless of whether there were any errors. 115fa9e4066Sahrens * 116fa9e4066Sahrens * (6) After dropping all locks, invoke zil_commit(zilog, seq, ioflag) 117fa9e4066Sahrens * to ensure that synchronous semantics are provided when necessary. 118fa9e4066Sahrens * 119fa9e4066Sahrens * In general, this is how things should be ordered in each vnode op: 120fa9e4066Sahrens * 121fa9e4066Sahrens * ZFS_ENTER(zfsvfs); // exit if unmounted 122fa9e4066Sahrens * top: 123fa9e4066Sahrens * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 124fa9e4066Sahrens * rw_enter(...); // grab any other locks you need 125fa9e4066Sahrens * tx = dmu_tx_create(...); // get DMU tx 126fa9e4066Sahrens * dmu_tx_hold_*(); // hold each object you might modify 127fa9e4066Sahrens * error = dmu_tx_assign(tx, zfsvfs->z_assign); // try to assign 128fa9e4066Sahrens * if (error) { 129fa9e4066Sahrens * dmu_tx_abort(tx); // abort DMU tx 130fa9e4066Sahrens * rw_exit(...); // drop locks 131fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 132fa9e4066Sahrens * VN_RELE(...); // release held vnodes 133fa9e4066Sahrens * if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 134fa9e4066Sahrens * txg_wait_open(dmu_objset_pool(os), 0); 135fa9e4066Sahrens * goto top; 136fa9e4066Sahrens * } 137fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 138fa9e4066Sahrens * return (error); // really out of space 139fa9e4066Sahrens * } 140fa9e4066Sahrens * error = do_real_work(); // do whatever this VOP does 141fa9e4066Sahrens * if (error == 0) 142fa9e4066Sahrens * seq = zfs_log_*(...); // on success, make ZIL entry 143fa9e4066Sahrens * dmu_tx_commit(tx); // commit DMU tx -- error or not 144fa9e4066Sahrens * rw_exit(...); // drop locks 145fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 146fa9e4066Sahrens * VN_RELE(...); // release held vnodes 147fa9e4066Sahrens * zil_commit(zilog, seq, ioflag); // synchronous when necessary 148fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 149fa9e4066Sahrens * return (error); // done, report error 150fa9e4066Sahrens */ 151fa9e4066Sahrens 152fa9e4066Sahrens /* ARGSUSED */ 153fa9e4066Sahrens static int 154fa9e4066Sahrens zfs_open(vnode_t **vpp, int flag, cred_t *cr) 155fa9e4066Sahrens { 156fa9e4066Sahrens return (0); 157fa9e4066Sahrens } 158fa9e4066Sahrens 159fa9e4066Sahrens /* ARGSUSED */ 160fa9e4066Sahrens static int 161fa9e4066Sahrens zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr) 162fa9e4066Sahrens { 163fa9e4066Sahrens /* 164fa9e4066Sahrens * Clean up any locks held by this process on the vp. 165fa9e4066Sahrens */ 166fa9e4066Sahrens cleanlocks(vp, ddi_get_pid(), 0); 167fa9e4066Sahrens cleanshares(vp, ddi_get_pid()); 168fa9e4066Sahrens 169fa9e4066Sahrens return (0); 170fa9e4066Sahrens } 171fa9e4066Sahrens 172fa9e4066Sahrens /* 173fa9e4066Sahrens * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 174fa9e4066Sahrens * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 175fa9e4066Sahrens */ 176fa9e4066Sahrens static int 177fa9e4066Sahrens zfs_holey(vnode_t *vp, int cmd, offset_t *off) 178fa9e4066Sahrens { 179fa9e4066Sahrens znode_t *zp = VTOZ(vp); 180fa9e4066Sahrens uint64_t noff = (uint64_t)*off; /* new offset */ 181fa9e4066Sahrens uint64_t file_sz; 182fa9e4066Sahrens int error; 183fa9e4066Sahrens boolean_t hole; 184fa9e4066Sahrens 185fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_READER); 186fa9e4066Sahrens file_sz = zp->z_phys->zp_size; 187fa9e4066Sahrens if (noff >= file_sz) { 188fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 189fa9e4066Sahrens return (ENXIO); 190fa9e4066Sahrens } 191fa9e4066Sahrens 192fa9e4066Sahrens if (cmd == _FIO_SEEK_HOLE) 193fa9e4066Sahrens hole = B_TRUE; 194fa9e4066Sahrens else 195fa9e4066Sahrens hole = B_FALSE; 196fa9e4066Sahrens 197fa9e4066Sahrens error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 198fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 199fa9e4066Sahrens 200fa9e4066Sahrens /* end of file? */ 201fa9e4066Sahrens if ((error == ESRCH) || (noff > file_sz)) { 202fa9e4066Sahrens /* 203fa9e4066Sahrens * Handle the virtual hole at the end of file. 204fa9e4066Sahrens */ 205fa9e4066Sahrens if (hole) { 206fa9e4066Sahrens *off = file_sz; 207fa9e4066Sahrens return (0); 208fa9e4066Sahrens } 209fa9e4066Sahrens return (ENXIO); 210fa9e4066Sahrens } 211fa9e4066Sahrens 212fa9e4066Sahrens if (noff < *off) 213fa9e4066Sahrens return (error); 214fa9e4066Sahrens *off = noff; 215fa9e4066Sahrens return (error); 216fa9e4066Sahrens } 217fa9e4066Sahrens 218fa9e4066Sahrens /* ARGSUSED */ 219fa9e4066Sahrens static int 220fa9e4066Sahrens zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred, 221fa9e4066Sahrens int *rvalp) 222fa9e4066Sahrens { 223fa9e4066Sahrens offset_t off; 224fa9e4066Sahrens int error; 225fa9e4066Sahrens zfsvfs_t *zfsvfs; 226fa9e4066Sahrens 227fa9e4066Sahrens switch (com) { 228fa9e4066Sahrens case _FIOFFS: 229fa9e4066Sahrens return (zfs_sync(vp->v_vfsp, 0, cred)); 230fa9e4066Sahrens 231fa9e4066Sahrens case _FIO_SEEK_DATA: 232fa9e4066Sahrens case _FIO_SEEK_HOLE: 233fa9e4066Sahrens if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 234fa9e4066Sahrens return (EFAULT); 235fa9e4066Sahrens 236fa9e4066Sahrens zfsvfs = VTOZ(vp)->z_zfsvfs; 237fa9e4066Sahrens ZFS_ENTER(zfsvfs); 238fa9e4066Sahrens 239fa9e4066Sahrens /* offset parameter is in/out */ 240fa9e4066Sahrens error = zfs_holey(vp, com, &off); 241fa9e4066Sahrens ZFS_EXIT(zfsvfs); 242fa9e4066Sahrens if (error) 243fa9e4066Sahrens return (error); 244fa9e4066Sahrens if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 245fa9e4066Sahrens return (EFAULT); 246fa9e4066Sahrens return (0); 247fa9e4066Sahrens } 248fa9e4066Sahrens return (ENOTTY); 249fa9e4066Sahrens } 250fa9e4066Sahrens 251fa9e4066Sahrens /* 252fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 253fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 254fa9e4066Sahrens * 255fa9e4066Sahrens * On Write: If we find a memory mapped page, we write to *both* 256fa9e4066Sahrens * the page and the dmu buffer. 257fa9e4066Sahrens * 258fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 259fa9e4066Sahrens * the file is memory mapped. 260fa9e4066Sahrens */ 261fa9e4066Sahrens static int 262fa9e4066Sahrens mappedwrite(vnode_t *vp, uint64_t woff, int nbytes, uio_t *uio, dmu_tx_t *tx) 263fa9e4066Sahrens { 264fa9e4066Sahrens znode_t *zp = VTOZ(vp); 265fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 266fa9e4066Sahrens int64_t start, off; 267fa9e4066Sahrens int len = nbytes; 268fa9e4066Sahrens int error = 0; 269fa9e4066Sahrens 270fa9e4066Sahrens start = uio->uio_loffset; 271fa9e4066Sahrens off = start & PAGEOFFSET; 272fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 273fa9e4066Sahrens page_t *pp; 274fa9e4066Sahrens uint64_t bytes = MIN(PAGESIZE - off, len); 275fa9e4066Sahrens 276fa9e4066Sahrens /* 277fa9e4066Sahrens * We don't want a new page to "appear" in the middle of 278fa9e4066Sahrens * the file update (because it may not get the write 279fa9e4066Sahrens * update data), so we grab a lock to block 280fa9e4066Sahrens * zfs_getpage(). 281fa9e4066Sahrens */ 282fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 283fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 284fa9e4066Sahrens caddr_t va; 285fa9e4066Sahrens 286fa9e4066Sahrens rw_exit(&zp->z_map_lock); 287fa9e4066Sahrens va = ppmapin(pp, PROT_READ | PROT_WRITE, (caddr_t)-1L); 288fa9e4066Sahrens error = uiomove(va+off, bytes, UIO_WRITE, uio); 289fa9e4066Sahrens if (error == 0) { 290fa9e4066Sahrens dmu_write(zfsvfs->z_os, zp->z_id, 291fa9e4066Sahrens woff, bytes, va+off, tx); 292fa9e4066Sahrens } 293fa9e4066Sahrens ppmapout(va); 294fa9e4066Sahrens page_unlock(pp); 295fa9e4066Sahrens } else { 296fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 297fa9e4066Sahrens woff, bytes, uio, tx); 298fa9e4066Sahrens rw_exit(&zp->z_map_lock); 299fa9e4066Sahrens } 300fa9e4066Sahrens len -= bytes; 301fa9e4066Sahrens woff += bytes; 302fa9e4066Sahrens off = 0; 303fa9e4066Sahrens if (error) 304fa9e4066Sahrens break; 305fa9e4066Sahrens } 306fa9e4066Sahrens return (error); 307fa9e4066Sahrens } 308fa9e4066Sahrens 309fa9e4066Sahrens /* 310fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 311fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 312fa9e4066Sahrens * 313fa9e4066Sahrens * On Read: We "read" preferentially from memory mapped pages, 314fa9e4066Sahrens * else we default from the dmu buffer. 315fa9e4066Sahrens * 316fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 317fa9e4066Sahrens * the file is memory mapped. 318fa9e4066Sahrens */ 319fa9e4066Sahrens static int 320fa9e4066Sahrens mappedread(vnode_t *vp, char *addr, int nbytes, uio_t *uio) 321fa9e4066Sahrens { 322fa9e4066Sahrens int64_t start, off, bytes; 323fa9e4066Sahrens int len = nbytes; 324fa9e4066Sahrens int error = 0; 325fa9e4066Sahrens 326fa9e4066Sahrens start = uio->uio_loffset; 327fa9e4066Sahrens off = start & PAGEOFFSET; 328fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 329fa9e4066Sahrens page_t *pp; 330fa9e4066Sahrens 331fa9e4066Sahrens bytes = MIN(PAGESIZE - off, len); 332fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 333fa9e4066Sahrens caddr_t va; 334fa9e4066Sahrens 335fa9e4066Sahrens va = ppmapin(pp, PROT_READ | PROT_WRITE, (caddr_t)-1L); 336fa9e4066Sahrens error = uiomove(va + off, bytes, UIO_READ, uio); 337fa9e4066Sahrens ppmapout(va); 338fa9e4066Sahrens page_unlock(pp); 339fa9e4066Sahrens } else { 340fa9e4066Sahrens /* XXX use dmu_read here? */ 341fa9e4066Sahrens error = uiomove(addr, bytes, UIO_READ, uio); 342fa9e4066Sahrens } 343fa9e4066Sahrens len -= bytes; 344fa9e4066Sahrens addr += bytes; 345fa9e4066Sahrens off = 0; 346fa9e4066Sahrens if (error) 347fa9e4066Sahrens break; 348fa9e4066Sahrens } 349fa9e4066Sahrens return (error); 350fa9e4066Sahrens } 351fa9e4066Sahrens 352fa9e4066Sahrens uint_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 353fa9e4066Sahrens 354fa9e4066Sahrens /* 355fa9e4066Sahrens * Read bytes from specified file into supplied buffer. 356fa9e4066Sahrens * 357fa9e4066Sahrens * IN: vp - vnode of file to be read from. 358fa9e4066Sahrens * uio - structure supplying read location, range info, 359fa9e4066Sahrens * and return buffer. 360fa9e4066Sahrens * ioflag - SYNC flags; used to provide FRSYNC semantics. 361fa9e4066Sahrens * cr - credentials of caller. 362fa9e4066Sahrens * 363fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 364fa9e4066Sahrens * 365fa9e4066Sahrens * RETURN: 0 if success 366fa9e4066Sahrens * error code if failure 367fa9e4066Sahrens * 368fa9e4066Sahrens * Side Effects: 369fa9e4066Sahrens * vp - atime updated if byte count > 0 370fa9e4066Sahrens */ 371fa9e4066Sahrens /* ARGSUSED */ 372fa9e4066Sahrens static int 373fa9e4066Sahrens zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 374fa9e4066Sahrens { 375fa9e4066Sahrens znode_t *zp = VTOZ(vp); 376fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 377fa9e4066Sahrens uint64_t delta; 378fa9e4066Sahrens ssize_t n, size, cnt, ndone; 379fa9e4066Sahrens int error, i, numbufs; 380fa9e4066Sahrens dmu_buf_t *dbp, **dbpp; 381fa9e4066Sahrens 382fa9e4066Sahrens ZFS_ENTER(zfsvfs); 383fa9e4066Sahrens 384fa9e4066Sahrens /* 385fa9e4066Sahrens * Validate file offset 386fa9e4066Sahrens */ 387fa9e4066Sahrens if (uio->uio_loffset < (offset_t)0) { 388fa9e4066Sahrens ZFS_EXIT(zfsvfs); 389fa9e4066Sahrens return (EINVAL); 390fa9e4066Sahrens } 391fa9e4066Sahrens 392fa9e4066Sahrens /* 393fa9e4066Sahrens * Fasttrack empty reads 394fa9e4066Sahrens */ 395fa9e4066Sahrens if (uio->uio_resid == 0) { 396fa9e4066Sahrens ZFS_EXIT(zfsvfs); 397fa9e4066Sahrens return (0); 398fa9e4066Sahrens } 399fa9e4066Sahrens 400fa9e4066Sahrens /* 401fa9e4066Sahrens * Check for region locks 402fa9e4066Sahrens */ 403fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode)) { 404fa9e4066Sahrens if (error = chklock(vp, FREAD, 405fa9e4066Sahrens uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 406fa9e4066Sahrens ZFS_EXIT(zfsvfs); 407fa9e4066Sahrens return (error); 408fa9e4066Sahrens } 409fa9e4066Sahrens } 410fa9e4066Sahrens 411fa9e4066Sahrens /* 412fa9e4066Sahrens * If we're in FRSYNC mode, sync out this znode before reading it. 413fa9e4066Sahrens */ 414fa9e4066Sahrens zil_commit(zfsvfs->z_log, zp->z_last_itx, ioflag & FRSYNC); 415fa9e4066Sahrens 416fa9e4066Sahrens /* 417fa9e4066Sahrens * Make sure nobody restructures the file (changes block size) 418fa9e4066Sahrens * in the middle of the read. 419fa9e4066Sahrens */ 420fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_READER); 421fa9e4066Sahrens /* 422fa9e4066Sahrens * If we are reading past end-of-file we can skip 423fa9e4066Sahrens * to the end; but we might still need to set atime. 424fa9e4066Sahrens */ 425fa9e4066Sahrens if (uio->uio_loffset >= zp->z_phys->zp_size) { 426fa9e4066Sahrens cnt = 0; 427fa9e4066Sahrens error = 0; 428fa9e4066Sahrens goto out; 429fa9e4066Sahrens } 430fa9e4066Sahrens 431fa9e4066Sahrens cnt = MIN(uio->uio_resid, zp->z_phys->zp_size - uio->uio_loffset); 432fa9e4066Sahrens 433fa9e4066Sahrens for (ndone = 0; ndone < cnt; ndone += zfs_read_chunk_size) { 434fa9e4066Sahrens ASSERT(uio->uio_loffset < zp->z_phys->zp_size); 435fa9e4066Sahrens n = MIN(zfs_read_chunk_size, 436fa9e4066Sahrens zp->z_phys->zp_size - uio->uio_loffset); 437fa9e4066Sahrens n = MIN(n, cnt); 438fa9e4066Sahrens dbpp = dmu_buf_hold_array(zfsvfs->z_os, zp->z_id, 439fa9e4066Sahrens uio->uio_loffset, n, &numbufs); 440fa9e4066Sahrens if (error = dmu_buf_read_array_canfail(dbpp, numbufs)) { 441fa9e4066Sahrens dmu_buf_rele_array(dbpp, numbufs); 442fa9e4066Sahrens goto out; 443fa9e4066Sahrens } 444fa9e4066Sahrens /* 445fa9e4066Sahrens * Compute the adjustment to align the dmu buffers 446fa9e4066Sahrens * with the uio buffer. 447fa9e4066Sahrens */ 448fa9e4066Sahrens delta = uio->uio_loffset - dbpp[0]->db_offset; 449fa9e4066Sahrens 450fa9e4066Sahrens for (i = 0; i < numbufs; i++) { 451fa9e4066Sahrens if (n < 0) 452fa9e4066Sahrens break; 453fa9e4066Sahrens dbp = dbpp[i]; 454fa9e4066Sahrens size = dbp->db_size - delta; 455fa9e4066Sahrens /* 456fa9e4066Sahrens * XXX -- this is correct, but may be suboptimal. 457fa9e4066Sahrens * If the pages are all clean, we don't need to 458fa9e4066Sahrens * go through mappedread(). Maybe the VMODSORT 459fa9e4066Sahrens * stuff can help us here. 460fa9e4066Sahrens */ 461fa9e4066Sahrens if (vn_has_cached_data(vp)) { 462fa9e4066Sahrens error = mappedread(vp, (caddr_t)dbp->db_data + 463fa9e4066Sahrens delta, (n < size ? n : size), uio); 464fa9e4066Sahrens } else { 465fa9e4066Sahrens error = uiomove((caddr_t)dbp->db_data + delta, 466fa9e4066Sahrens (n < size ? n : size), UIO_READ, uio); 467fa9e4066Sahrens } 468fa9e4066Sahrens if (error) { 469fa9e4066Sahrens dmu_buf_rele_array(dbpp, numbufs); 470fa9e4066Sahrens goto out; 471fa9e4066Sahrens } 472fa9e4066Sahrens n -= dbp->db_size; 473fa9e4066Sahrens if (delta) { 474fa9e4066Sahrens n += delta; 475fa9e4066Sahrens delta = 0; 476fa9e4066Sahrens } 477fa9e4066Sahrens } 478fa9e4066Sahrens dmu_buf_rele_array(dbpp, numbufs); 479fa9e4066Sahrens } 480fa9e4066Sahrens out: 481fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 482fa9e4066Sahrens 483fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 484fa9e4066Sahrens ZFS_EXIT(zfsvfs); 485fa9e4066Sahrens return (error); 486fa9e4066Sahrens } 487fa9e4066Sahrens 488fa9e4066Sahrens /* 489fa9e4066Sahrens * Fault in the pages of the first n bytes specified by the uio structure. 490fa9e4066Sahrens * 1 byte in each page is touched and the uio struct is unmodified. 491fa9e4066Sahrens * Any error will exit this routine as this is only a best 492fa9e4066Sahrens * attempt to get the pages resident. This is a copy of ufs_trans_touch(). 493fa9e4066Sahrens */ 494fa9e4066Sahrens static void 495fa9e4066Sahrens zfs_prefault_write(ssize_t n, struct uio *uio) 496fa9e4066Sahrens { 497fa9e4066Sahrens struct iovec *iov; 498fa9e4066Sahrens ulong_t cnt, incr; 499fa9e4066Sahrens caddr_t p; 500fa9e4066Sahrens uint8_t tmp; 501fa9e4066Sahrens 502fa9e4066Sahrens iov = uio->uio_iov; 503fa9e4066Sahrens 504fa9e4066Sahrens while (n) { 505fa9e4066Sahrens cnt = MIN(iov->iov_len, n); 506fa9e4066Sahrens if (cnt == 0) { 507fa9e4066Sahrens /* empty iov entry */ 508fa9e4066Sahrens iov++; 509fa9e4066Sahrens continue; 510fa9e4066Sahrens } 511fa9e4066Sahrens n -= cnt; 512fa9e4066Sahrens /* 513fa9e4066Sahrens * touch each page in this segment. 514fa9e4066Sahrens */ 515fa9e4066Sahrens p = iov->iov_base; 516fa9e4066Sahrens while (cnt) { 517fa9e4066Sahrens switch (uio->uio_segflg) { 518fa9e4066Sahrens case UIO_USERSPACE: 519fa9e4066Sahrens case UIO_USERISPACE: 520fa9e4066Sahrens if (fuword8(p, &tmp)) 521fa9e4066Sahrens return; 522fa9e4066Sahrens break; 523fa9e4066Sahrens case UIO_SYSSPACE: 524fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 525fa9e4066Sahrens return; 526fa9e4066Sahrens break; 527fa9e4066Sahrens } 528fa9e4066Sahrens incr = MIN(cnt, PAGESIZE); 529fa9e4066Sahrens p += incr; 530fa9e4066Sahrens cnt -= incr; 531fa9e4066Sahrens } 532fa9e4066Sahrens /* 533fa9e4066Sahrens * touch the last byte in case it straddles a page. 534fa9e4066Sahrens */ 535fa9e4066Sahrens p--; 536fa9e4066Sahrens switch (uio->uio_segflg) { 537fa9e4066Sahrens case UIO_USERSPACE: 538fa9e4066Sahrens case UIO_USERISPACE: 539fa9e4066Sahrens if (fuword8(p, &tmp)) 540fa9e4066Sahrens return; 541fa9e4066Sahrens break; 542fa9e4066Sahrens case UIO_SYSSPACE: 543fa9e4066Sahrens if (kcopy(p, &tmp, 1)) 544fa9e4066Sahrens return; 545fa9e4066Sahrens break; 546fa9e4066Sahrens } 547fa9e4066Sahrens iov++; 548fa9e4066Sahrens } 549fa9e4066Sahrens } 550fa9e4066Sahrens 551fa9e4066Sahrens /* 552fa9e4066Sahrens * Write the bytes to a file. 553fa9e4066Sahrens * 554fa9e4066Sahrens * IN: vp - vnode of file to be written to. 555fa9e4066Sahrens * uio - structure supplying write location, range info, 556fa9e4066Sahrens * and data buffer. 557fa9e4066Sahrens * ioflag - FAPPEND flag set if in append mode. 558fa9e4066Sahrens * cr - credentials of caller. 559fa9e4066Sahrens * 560fa9e4066Sahrens * OUT: uio - updated offset and range. 561fa9e4066Sahrens * 562fa9e4066Sahrens * RETURN: 0 if success 563fa9e4066Sahrens * error code if failure 564fa9e4066Sahrens * 565fa9e4066Sahrens * Timestamps: 566fa9e4066Sahrens * vp - ctime|mtime updated if byte count > 0 567fa9e4066Sahrens * 568fa9e4066Sahrens * Note: zfs_write() holds z_append_lock across calls to txg_wait_open(). 569fa9e4066Sahrens * It has to because of the semantics of FAPPEND. The implication is that 570fa9e4066Sahrens * we must never grab z_append_lock while in an assigned tx. 571fa9e4066Sahrens */ 572fa9e4066Sahrens /* ARGSUSED */ 573fa9e4066Sahrens static int 574fa9e4066Sahrens zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 575fa9e4066Sahrens { 576fa9e4066Sahrens znode_t *zp = VTOZ(vp); 577fa9e4066Sahrens rlim64_t limit = uio->uio_llimit; 578fa9e4066Sahrens ssize_t start_resid = uio->uio_resid; 579fa9e4066Sahrens ssize_t tx_bytes; 580fa9e4066Sahrens uint64_t end_size; 581fa9e4066Sahrens dmu_tx_t *tx; 582fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 583fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 584fa9e4066Sahrens uint64_t seq = 0; 585fa9e4066Sahrens offset_t woff; 586fa9e4066Sahrens ssize_t n, nbytes; 587fa9e4066Sahrens int max_blksz = zfsvfs->z_max_blksz; 588fa9e4066Sahrens int need_append_lock, error; 589fa9e4066Sahrens krw_t grow_rw = RW_READER; 590fa9e4066Sahrens 591fa9e4066Sahrens if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 592fa9e4066Sahrens limit = MAXOFFSET_T; 593fa9e4066Sahrens 594fa9e4066Sahrens n = start_resid; 595fa9e4066Sahrens 596fa9e4066Sahrens /* 597fa9e4066Sahrens * Fasttrack empty write 598fa9e4066Sahrens */ 599fa9e4066Sahrens if (n == 0) 600fa9e4066Sahrens return (0); 601fa9e4066Sahrens 602fa9e4066Sahrens ZFS_ENTER(zfsvfs); 603fa9e4066Sahrens 604fa9e4066Sahrens /* 605fa9e4066Sahrens * Pre-fault the pages to ensure slow (eg NFS) pages don't hold up txg 606fa9e4066Sahrens */ 607fa9e4066Sahrens zfs_prefault_write(MIN(start_resid, SPA_MAXBLOCKSIZE), uio); 608fa9e4066Sahrens 609fa9e4066Sahrens /* 610fa9e4066Sahrens * If in append mode, set the io offset pointer to eof. 611fa9e4066Sahrens */ 612fa9e4066Sahrens need_append_lock = ioflag & FAPPEND; 613fa9e4066Sahrens if (need_append_lock) { 614fa9e4066Sahrens rw_enter(&zp->z_append_lock, RW_WRITER); 615fa9e4066Sahrens woff = uio->uio_loffset = zp->z_phys->zp_size; 616fa9e4066Sahrens } else { 617fa9e4066Sahrens woff = uio->uio_loffset; 618fa9e4066Sahrens /* 619fa9e4066Sahrens * Validate file offset 620fa9e4066Sahrens */ 621fa9e4066Sahrens if (woff < 0) { 622fa9e4066Sahrens ZFS_EXIT(zfsvfs); 623fa9e4066Sahrens return (EINVAL); 624fa9e4066Sahrens } 625fa9e4066Sahrens 626fa9e4066Sahrens /* 627fa9e4066Sahrens * If this write could change the file length, 628fa9e4066Sahrens * we need to synchronize with "appenders". 629fa9e4066Sahrens */ 630fa9e4066Sahrens if (woff < limit - n && woff + n > zp->z_phys->zp_size) { 631fa9e4066Sahrens need_append_lock = TRUE; 632fa9e4066Sahrens rw_enter(&zp->z_append_lock, RW_READER); 633fa9e4066Sahrens } 634fa9e4066Sahrens } 635fa9e4066Sahrens 636fa9e4066Sahrens if (woff >= limit) { 637fa9e4066Sahrens error = EFBIG; 638fa9e4066Sahrens goto no_tx_done; 639fa9e4066Sahrens } 640fa9e4066Sahrens 641fa9e4066Sahrens if ((woff + n) > limit || woff > (limit - n)) 642fa9e4066Sahrens n = limit - woff; 643fa9e4066Sahrens 644fa9e4066Sahrens /* 645fa9e4066Sahrens * Check for region locks 646fa9e4066Sahrens */ 647fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode) && 648fa9e4066Sahrens (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) 649fa9e4066Sahrens goto no_tx_done; 650fa9e4066Sahrens top: 651fa9e4066Sahrens /* 652fa9e4066Sahrens * Make sure nobody restructures the file (changes block size) 653fa9e4066Sahrens * in the middle of the write. 654fa9e4066Sahrens */ 655fa9e4066Sahrens rw_enter(&zp->z_grow_lock, grow_rw); 656fa9e4066Sahrens 657fa9e4066Sahrens end_size = MAX(zp->z_phys->zp_size, woff + n); 658fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 659fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 660fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 661fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 662fa9e4066Sahrens if (error) { 663fa9e4066Sahrens dmu_tx_abort(tx); 664fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 665fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 666fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 667fa9e4066Sahrens goto top; 668fa9e4066Sahrens } 669fa9e4066Sahrens goto no_tx_done; 670fa9e4066Sahrens } 671fa9e4066Sahrens 672fa9e4066Sahrens if (end_size > zp->z_blksz && 673fa9e4066Sahrens (!ISP2(zp->z_blksz) || zp->z_blksz < max_blksz)) { 674fa9e4066Sahrens uint64_t new_blksz; 675fa9e4066Sahrens /* 676fa9e4066Sahrens * This write will increase the file size beyond 677fa9e4066Sahrens * the current block size so increase the block size. 678fa9e4066Sahrens */ 679fa9e4066Sahrens if (grow_rw == RW_READER && !rw_tryupgrade(&zp->z_grow_lock)) { 680fa9e4066Sahrens dmu_tx_commit(tx); 681fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 682fa9e4066Sahrens grow_rw = RW_WRITER; 683fa9e4066Sahrens goto top; 684fa9e4066Sahrens } 685fa9e4066Sahrens if (zp->z_blksz > max_blksz) { 686fa9e4066Sahrens ASSERT(!ISP2(zp->z_blksz)); 687fa9e4066Sahrens new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 688fa9e4066Sahrens } else { 689fa9e4066Sahrens new_blksz = MIN(end_size, max_blksz); 690fa9e4066Sahrens } 691fa9e4066Sahrens error = zfs_grow_blocksize(zp, new_blksz, tx); 692fa9e4066Sahrens if (error) { 693fa9e4066Sahrens tx_bytes = 0; 694fa9e4066Sahrens goto tx_done; 695fa9e4066Sahrens } 696fa9e4066Sahrens } 697fa9e4066Sahrens 698fa9e4066Sahrens if (grow_rw == RW_WRITER) { 699fa9e4066Sahrens rw_downgrade(&zp->z_grow_lock); 700fa9e4066Sahrens grow_rw = RW_READER; 701fa9e4066Sahrens } 702fa9e4066Sahrens 703fa9e4066Sahrens /* 704fa9e4066Sahrens * The file data does not fit in the znode "cache", so we 705fa9e4066Sahrens * will be writing to the file block data buffers. 706fa9e4066Sahrens * Each buffer will be written in a separate transaction; 707fa9e4066Sahrens * this keeps the intent log records small and allows us 708fa9e4066Sahrens * to do more fine-grained space accounting. 709fa9e4066Sahrens */ 710fa9e4066Sahrens while (n > 0) { 711fa9e4066Sahrens /* 712fa9e4066Sahrens * XXX - should we really limit each write to z_max_blksz? 713fa9e4066Sahrens * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 714fa9e4066Sahrens */ 715fa9e4066Sahrens nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 716fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_READER); 717fa9e4066Sahrens 718fa9e4066Sahrens tx_bytes = uio->uio_resid; 719fa9e4066Sahrens if (vn_has_cached_data(vp)) { 720fa9e4066Sahrens rw_exit(&zp->z_map_lock); 721fa9e4066Sahrens error = mappedwrite(vp, woff, nbytes, uio, tx); 722fa9e4066Sahrens } else { 723fa9e4066Sahrens error = dmu_write_uio(zfsvfs->z_os, zp->z_id, 724fa9e4066Sahrens woff, nbytes, uio, tx); 725fa9e4066Sahrens rw_exit(&zp->z_map_lock); 726fa9e4066Sahrens } 727fa9e4066Sahrens tx_bytes -= uio->uio_resid; 728fa9e4066Sahrens 729fa9e4066Sahrens if (error) { 730fa9e4066Sahrens /* XXX - do we need to "clean up" the dmu buffer? */ 731fa9e4066Sahrens break; 732fa9e4066Sahrens } 733fa9e4066Sahrens 734fa9e4066Sahrens ASSERT(tx_bytes == nbytes); 735fa9e4066Sahrens 736fa9e4066Sahrens n -= nbytes; 737fa9e4066Sahrens if (n <= 0) 738fa9e4066Sahrens break; 739fa9e4066Sahrens 740fa9e4066Sahrens /* 741fa9e4066Sahrens * We have more work ahead of us, so wrap up this transaction 742fa9e4066Sahrens * and start another. Exact same logic as tx_done below. 743fa9e4066Sahrens */ 744fa9e4066Sahrens while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) { 745fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 746fa9e4066Sahrens (void) atomic_cas_64(&zp->z_phys->zp_size, end_size, 747fa9e4066Sahrens uio->uio_loffset); 748fa9e4066Sahrens } 749fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 750fa9e4066Sahrens seq = zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, 751fa9e4066Sahrens ioflag, uio); 752fa9e4066Sahrens dmu_tx_commit(tx); 753fa9e4066Sahrens 754fa9e4066Sahrens /* Pre-fault the next set of pages */ 755fa9e4066Sahrens zfs_prefault_write(MIN(n, SPA_MAXBLOCKSIZE), uio); 756fa9e4066Sahrens 757fa9e4066Sahrens /* 758fa9e4066Sahrens * Start another transaction. 759fa9e4066Sahrens */ 760fa9e4066Sahrens woff = uio->uio_loffset; 761fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 762fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 763fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 764fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 765fa9e4066Sahrens if (error) { 766fa9e4066Sahrens dmu_tx_abort(tx); 767fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 768fa9e4066Sahrens if (error == ERESTART && 769fa9e4066Sahrens zfsvfs->z_assign == TXG_NOWAIT) { 770fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 771fa9e4066Sahrens goto top; 772fa9e4066Sahrens } 773fa9e4066Sahrens goto no_tx_done; 774fa9e4066Sahrens } 775fa9e4066Sahrens } 776fa9e4066Sahrens 777fa9e4066Sahrens tx_done: 778fa9e4066Sahrens 779fa9e4066Sahrens if (tx_bytes != 0) { 780fa9e4066Sahrens /* 781fa9e4066Sahrens * Update the file size if it has changed; account 782fa9e4066Sahrens * for possible concurrent updates. 783fa9e4066Sahrens */ 784fa9e4066Sahrens while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) { 785fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 786fa9e4066Sahrens (void) atomic_cas_64(&zp->z_phys->zp_size, end_size, 787fa9e4066Sahrens uio->uio_loffset); 788fa9e4066Sahrens } 789fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 790fa9e4066Sahrens seq = zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, 791fa9e4066Sahrens ioflag, uio); 792fa9e4066Sahrens } 793fa9e4066Sahrens dmu_tx_commit(tx); 794fa9e4066Sahrens 795fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 796fa9e4066Sahrens 797fa9e4066Sahrens no_tx_done: 798fa9e4066Sahrens 799fa9e4066Sahrens if (need_append_lock) 800fa9e4066Sahrens rw_exit(&zp->z_append_lock); 801fa9e4066Sahrens 802fa9e4066Sahrens /* 803fa9e4066Sahrens * If we're in replay mode, or we made no progress, return error. 804fa9e4066Sahrens * Otherwise, it's at least a partial write, so it's successful. 805fa9e4066Sahrens */ 806fa9e4066Sahrens if (zfsvfs->z_assign >= TXG_INITIAL || uio->uio_resid == start_resid) { 807fa9e4066Sahrens ZFS_EXIT(zfsvfs); 808fa9e4066Sahrens return (error); 809fa9e4066Sahrens } 810fa9e4066Sahrens 811fa9e4066Sahrens zil_commit(zilog, seq, ioflag & (FSYNC | FDSYNC)); 812fa9e4066Sahrens 813fa9e4066Sahrens ZFS_EXIT(zfsvfs); 814fa9e4066Sahrens return (0); 815fa9e4066Sahrens } 816fa9e4066Sahrens 817fa9e4066Sahrens /* 818fa9e4066Sahrens * Get data to generate a TX_WRITE intent log record. 819fa9e4066Sahrens */ 820fa9e4066Sahrens int 821fa9e4066Sahrens zfs_get_data(void *arg, lr_write_t *lr) 822fa9e4066Sahrens { 823fa9e4066Sahrens zfsvfs_t *zfsvfs = arg; 824fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 825fa9e4066Sahrens znode_t *zp; 826fa9e4066Sahrens uint64_t off = lr->lr_offset; 827fa9e4066Sahrens int dlen = lr->lr_length; /* length of user data */ 828fa9e4066Sahrens int reclen = lr->lr_common.lrc_reclen; 829fa9e4066Sahrens int error = 0; 830fa9e4066Sahrens 831fa9e4066Sahrens ASSERT(dlen != 0); 832fa9e4066Sahrens 833fa9e4066Sahrens /* 834fa9e4066Sahrens * Nothing to do if the file has been removed or truncated. 835fa9e4066Sahrens */ 836fa9e4066Sahrens if (zfs_zget(zfsvfs, lr->lr_foid, &zp) != 0) 837fa9e4066Sahrens return (ENOENT); 838fa9e4066Sahrens if (off >= zp->z_phys->zp_size || zp->z_reap) { 839fa9e4066Sahrens VN_RELE(ZTOV(zp)); 840fa9e4066Sahrens return (ENOENT); 841fa9e4066Sahrens } 842fa9e4066Sahrens 843fa9e4066Sahrens /* 844fa9e4066Sahrens * Write records come in two flavors: immediate and indirect. 845fa9e4066Sahrens * For small writes it's cheaper to store the data with the 846fa9e4066Sahrens * log record (immediate); for large writes it's cheaper to 847fa9e4066Sahrens * sync the data and get a pointer to it (indirect) so that 848fa9e4066Sahrens * we don't have to write the data twice. 849fa9e4066Sahrens */ 850fa9e4066Sahrens if (sizeof (lr_write_t) + dlen <= reclen) { /* immediate write */ 851fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_READER); 852fa9e4066Sahrens dmu_buf_t *db = dmu_buf_hold(os, lr->lr_foid, off); 853fa9e4066Sahrens dmu_buf_read(db); 854fa9e4066Sahrens bcopy((char *)db->db_data + off - db->db_offset, lr + 1, dlen); 855fa9e4066Sahrens dmu_buf_rele(db); 856fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 857fa9e4066Sahrens } else { 858fa9e4066Sahrens /* 859fa9e4066Sahrens * We have to grab z_grow_lock as RW_WRITER because 860fa9e4066Sahrens * dmu_sync() can't handle concurrent dbuf_dirty() (6313856). 861fa9e4066Sahrens * z_grow_lock will be replaced with a range lock soon, 862fa9e4066Sahrens * which will eliminate the concurrency hit, but dmu_sync() 863fa9e4066Sahrens * really needs more thought. It shouldn't have to rely on 864fa9e4066Sahrens * the caller to provide MT safety. 865fa9e4066Sahrens */ 866fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_WRITER); 867fa9e4066Sahrens txg_suspend(dmu_objset_pool(os)); 868fa9e4066Sahrens error = dmu_sync(os, lr->lr_foid, off, &lr->lr_blkoff, 869fa9e4066Sahrens &lr->lr_blkptr, lr->lr_common.lrc_txg); 870fa9e4066Sahrens txg_resume(dmu_objset_pool(os)); 871fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 872fa9e4066Sahrens } 873fa9e4066Sahrens VN_RELE(ZTOV(zp)); 874fa9e4066Sahrens return (error); 875fa9e4066Sahrens } 876fa9e4066Sahrens 877fa9e4066Sahrens /*ARGSUSED*/ 878fa9e4066Sahrens static int 879fa9e4066Sahrens zfs_access(vnode_t *vp, int mode, int flags, cred_t *cr) 880fa9e4066Sahrens { 881fa9e4066Sahrens znode_t *zp = VTOZ(vp); 882fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 883fa9e4066Sahrens int error; 884fa9e4066Sahrens 885fa9e4066Sahrens ZFS_ENTER(zfsvfs); 886fa9e4066Sahrens error = zfs_zaccess_rwx(zp, mode, cr); 887fa9e4066Sahrens ZFS_EXIT(zfsvfs); 888fa9e4066Sahrens return (error); 889fa9e4066Sahrens } 890fa9e4066Sahrens 891fa9e4066Sahrens /* 892fa9e4066Sahrens * Lookup an entry in a directory, or an extended attribute directory. 893fa9e4066Sahrens * If it exists, return a held vnode reference for it. 894fa9e4066Sahrens * 895fa9e4066Sahrens * IN: dvp - vnode of directory to search. 896fa9e4066Sahrens * nm - name of entry to lookup. 897fa9e4066Sahrens * pnp - full pathname to lookup [UNUSED]. 898fa9e4066Sahrens * flags - LOOKUP_XATTR set if looking for an attribute. 899fa9e4066Sahrens * rdir - root directory vnode [UNUSED]. 900fa9e4066Sahrens * cr - credentials of caller. 901fa9e4066Sahrens * 902fa9e4066Sahrens * OUT: vpp - vnode of located entry, NULL if not found. 903fa9e4066Sahrens * 904fa9e4066Sahrens * RETURN: 0 if success 905fa9e4066Sahrens * error code if failure 906fa9e4066Sahrens * 907fa9e4066Sahrens * Timestamps: 908fa9e4066Sahrens * NA 909fa9e4066Sahrens */ 910fa9e4066Sahrens /* ARGSUSED */ 911fa9e4066Sahrens static int 912fa9e4066Sahrens zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 913fa9e4066Sahrens int flags, vnode_t *rdir, cred_t *cr) 914fa9e4066Sahrens { 915fa9e4066Sahrens 916fa9e4066Sahrens znode_t *zdp = VTOZ(dvp); 917fa9e4066Sahrens zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 918fa9e4066Sahrens int error; 919fa9e4066Sahrens 920fa9e4066Sahrens ZFS_ENTER(zfsvfs); 921fa9e4066Sahrens 922fa9e4066Sahrens *vpp = NULL; 923fa9e4066Sahrens 924fa9e4066Sahrens if (flags & LOOKUP_XATTR) { 925fa9e4066Sahrens /* 926fa9e4066Sahrens * We don't allow recursive attributes.. 927fa9e4066Sahrens * Maybe someday we will. 928fa9e4066Sahrens */ 929fa9e4066Sahrens if (zdp->z_phys->zp_flags & ZFS_XATTR) { 930fa9e4066Sahrens ZFS_EXIT(zfsvfs); 931fa9e4066Sahrens return (EINVAL); 932fa9e4066Sahrens } 933fa9e4066Sahrens 934fa9e4066Sahrens if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr)) { 935fa9e4066Sahrens ZFS_EXIT(zfsvfs); 936fa9e4066Sahrens return (error); 937fa9e4066Sahrens } 938fa9e4066Sahrens 939fa9e4066Sahrens /* 940fa9e4066Sahrens * Do we have permission to get into attribute directory? 941fa9e4066Sahrens */ 942fa9e4066Sahrens 943fa9e4066Sahrens if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, cr)) { 944fa9e4066Sahrens VN_RELE(*vpp); 945fa9e4066Sahrens } 946fa9e4066Sahrens 947fa9e4066Sahrens ZFS_EXIT(zfsvfs); 948fa9e4066Sahrens return (error); 949fa9e4066Sahrens } 950fa9e4066Sahrens 951*736b9155Smarks if (dvp->v_type != VDIR) 952*736b9155Smarks return (ENOTDIR); 953*736b9155Smarks 954fa9e4066Sahrens /* 955fa9e4066Sahrens * Check accessibility of directory. 956fa9e4066Sahrens */ 957fa9e4066Sahrens 958fa9e4066Sahrens if (error = zfs_zaccess(zdp, ACE_EXECUTE, cr)) { 959fa9e4066Sahrens ZFS_EXIT(zfsvfs); 960fa9e4066Sahrens return (error); 961fa9e4066Sahrens } 962fa9e4066Sahrens 963fa9e4066Sahrens if ((error = zfs_dirlook(zdp, nm, vpp)) == 0) { 964fa9e4066Sahrens 965fa9e4066Sahrens /* 966fa9e4066Sahrens * Convert device special files 967fa9e4066Sahrens */ 968fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 969fa9e4066Sahrens vnode_t *svp; 970fa9e4066Sahrens 971fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 972fa9e4066Sahrens VN_RELE(*vpp); 973fa9e4066Sahrens if (svp == NULL) 974fa9e4066Sahrens error = ENOSYS; 975fa9e4066Sahrens else 976fa9e4066Sahrens *vpp = svp; 977fa9e4066Sahrens } 978fa9e4066Sahrens } 979fa9e4066Sahrens 980fa9e4066Sahrens ZFS_EXIT(zfsvfs); 981fa9e4066Sahrens return (error); 982fa9e4066Sahrens } 983fa9e4066Sahrens 984fa9e4066Sahrens /* 985fa9e4066Sahrens * Attempt to create a new entry in a directory. If the entry 986fa9e4066Sahrens * already exists, truncate the file if permissible, else return 987fa9e4066Sahrens * an error. Return the vp of the created or trunc'd file. 988fa9e4066Sahrens * 989fa9e4066Sahrens * IN: dvp - vnode of directory to put new file entry in. 990fa9e4066Sahrens * name - name of new file entry. 991fa9e4066Sahrens * vap - attributes of new file. 992fa9e4066Sahrens * excl - flag indicating exclusive or non-exclusive mode. 993fa9e4066Sahrens * mode - mode to open file with. 994fa9e4066Sahrens * cr - credentials of caller. 995fa9e4066Sahrens * flag - large file flag [UNUSED]. 996fa9e4066Sahrens * 997fa9e4066Sahrens * OUT: vpp - vnode of created or trunc'd entry. 998fa9e4066Sahrens * 999fa9e4066Sahrens * RETURN: 0 if success 1000fa9e4066Sahrens * error code if failure 1001fa9e4066Sahrens * 1002fa9e4066Sahrens * Timestamps: 1003fa9e4066Sahrens * dvp - ctime|mtime updated if new entry created 1004fa9e4066Sahrens * vp - ctime|mtime always, atime if new 1005fa9e4066Sahrens */ 1006fa9e4066Sahrens /* ARGSUSED */ 1007fa9e4066Sahrens static int 1008fa9e4066Sahrens zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, 1009fa9e4066Sahrens int mode, vnode_t **vpp, cred_t *cr, int flag) 1010fa9e4066Sahrens { 1011fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1012fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1013fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1014fa9e4066Sahrens uint64_t seq = 0; 1015fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 1016fa9e4066Sahrens zfs_dirlock_t *dl; 1017fa9e4066Sahrens dmu_tx_t *tx; 1018fa9e4066Sahrens int error; 1019fa9e4066Sahrens uint64_t zoid; 1020fa9e4066Sahrens 1021fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1022fa9e4066Sahrens 1023fa9e4066Sahrens top: 1024fa9e4066Sahrens *vpp = NULL; 1025fa9e4066Sahrens 1026fa9e4066Sahrens if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) 1027fa9e4066Sahrens vap->va_mode &= ~VSVTX; 1028fa9e4066Sahrens 1029fa9e4066Sahrens if (*name == '\0') { 1030fa9e4066Sahrens /* 1031fa9e4066Sahrens * Null component name refers to the directory itself. 1032fa9e4066Sahrens */ 1033fa9e4066Sahrens VN_HOLD(dvp); 1034fa9e4066Sahrens zp = dzp; 1035fa9e4066Sahrens dl = NULL; 1036fa9e4066Sahrens error = 0; 1037fa9e4066Sahrens } else { 1038fa9e4066Sahrens /* possible VN_HOLD(zp) */ 1039fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, 0)) { 1040fa9e4066Sahrens if (strcmp(name, "..") == 0) 1041fa9e4066Sahrens error = EISDIR; 1042fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1043fa9e4066Sahrens return (error); 1044fa9e4066Sahrens } 1045fa9e4066Sahrens } 1046fa9e4066Sahrens 1047fa9e4066Sahrens zoid = zp ? zp->z_id : -1ULL; 1048fa9e4066Sahrens 1049fa9e4066Sahrens if (zp == NULL) { 1050fa9e4066Sahrens /* 1051fa9e4066Sahrens * Create a new file object and update the directory 1052fa9e4066Sahrens * to reference it. 1053fa9e4066Sahrens */ 1054fa9e4066Sahrens if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { 1055fa9e4066Sahrens goto out; 1056fa9e4066Sahrens } 1057fa9e4066Sahrens 1058fa9e4066Sahrens /* 1059fa9e4066Sahrens * We only support the creation of regular files in 1060fa9e4066Sahrens * extended attribute directories. 1061fa9e4066Sahrens */ 1062fa9e4066Sahrens if ((dzp->z_phys->zp_flags & ZFS_XATTR) && 1063fa9e4066Sahrens (vap->va_type != VREG)) { 1064fa9e4066Sahrens error = EINVAL; 1065fa9e4066Sahrens goto out; 1066fa9e4066Sahrens } 1067fa9e4066Sahrens 1068fa9e4066Sahrens tx = dmu_tx_create(os); 1069fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 1070fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 1071fa9e4066Sahrens dmu_tx_hold_zap(tx, dzp->z_id, 1); 1072fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 1073fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1074fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1075fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1076fa9e4066Sahrens if (error) { 1077fa9e4066Sahrens dmu_tx_abort(tx); 1078fa9e4066Sahrens zfs_dirent_unlock(dl); 1079fa9e4066Sahrens if (error == ERESTART && 1080fa9e4066Sahrens zfsvfs->z_assign == TXG_NOWAIT) { 1081fa9e4066Sahrens txg_wait_open(dmu_objset_pool(os), 0); 1082fa9e4066Sahrens goto top; 1083fa9e4066Sahrens } 1084fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1085fa9e4066Sahrens return (error); 1086fa9e4066Sahrens } 1087fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); 1088fa9e4066Sahrens ASSERT(zp->z_id == zoid); 1089fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1090fa9e4066Sahrens seq = zfs_log_create(zilog, tx, TX_CREATE, dzp, zp, name); 1091fa9e4066Sahrens dmu_tx_commit(tx); 1092fa9e4066Sahrens } else { 1093fa9e4066Sahrens /* 1094fa9e4066Sahrens * A directory entry already exists for this name. 1095fa9e4066Sahrens */ 1096fa9e4066Sahrens /* 1097fa9e4066Sahrens * Can't truncate an existing file if in exclusive mode. 1098fa9e4066Sahrens */ 1099fa9e4066Sahrens if (excl == EXCL) { 1100fa9e4066Sahrens error = EEXIST; 1101fa9e4066Sahrens goto out; 1102fa9e4066Sahrens } 1103fa9e4066Sahrens /* 1104fa9e4066Sahrens * Can't open a directory for writing. 1105fa9e4066Sahrens */ 1106fa9e4066Sahrens if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1107fa9e4066Sahrens error = EISDIR; 1108fa9e4066Sahrens goto out; 1109fa9e4066Sahrens } 1110fa9e4066Sahrens /* 1111fa9e4066Sahrens * Verify requested access to file. 1112fa9e4066Sahrens */ 1113fa9e4066Sahrens if (mode && (error = zfs_zaccess_rwx(zp, mode, cr))) { 1114fa9e4066Sahrens goto out; 1115fa9e4066Sahrens } 1116fa9e4066Sahrens /* 1117fa9e4066Sahrens * Truncate regular files if requested. 1118fa9e4066Sahrens */ 1119fa9e4066Sahrens 1120fa9e4066Sahrens /* 1121fa9e4066Sahrens * Need to update dzp->z_seq? 1122fa9e4066Sahrens */ 1123fa9e4066Sahrens 1124fa9e4066Sahrens mutex_enter(&dzp->z_lock); 1125fa9e4066Sahrens dzp->z_seq++; 1126fa9e4066Sahrens mutex_exit(&dzp->z_lock); 1127fa9e4066Sahrens 1128fa9e4066Sahrens if ((ZTOV(zp)->v_type == VREG) && (zp->z_phys->zp_size != 0) && 1129fa9e4066Sahrens (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 1130fa9e4066Sahrens /* 1131fa9e4066Sahrens * Truncate the file. 1132fa9e4066Sahrens */ 1133fa9e4066Sahrens tx = dmu_tx_create(os); 1134fa9e4066Sahrens dmu_tx_hold_bonus(tx, zoid); 1135fa9e4066Sahrens dmu_tx_hold_free(tx, zoid, 0, DMU_OBJECT_END); 1136fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1137fa9e4066Sahrens if (error) { 1138fa9e4066Sahrens dmu_tx_abort(tx); 1139fa9e4066Sahrens if (dl) 1140fa9e4066Sahrens zfs_dirent_unlock(dl); 1141fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1142fa9e4066Sahrens if (error == ERESTART && 1143fa9e4066Sahrens zfsvfs->z_assign == TXG_NOWAIT) { 1144fa9e4066Sahrens txg_wait_open(dmu_objset_pool(os), 0); 1145fa9e4066Sahrens goto top; 1146fa9e4066Sahrens } 1147fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1148fa9e4066Sahrens return (error); 1149fa9e4066Sahrens } 1150fa9e4066Sahrens /* 1151fa9e4066Sahrens * Grab the grow_lock to serialize this change with 1152fa9e4066Sahrens * respect to other file manipulations. 1153fa9e4066Sahrens */ 1154fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_WRITER); 1155fa9e4066Sahrens error = zfs_freesp(zp, 0, 0, mode, tx, cr); 1156fa9e4066Sahrens if (error == 0) { 1157fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 1158fa9e4066Sahrens seq = zfs_log_truncate(zilog, tx, 1159fa9e4066Sahrens TX_TRUNCATE, zp, 0, 0); 1160fa9e4066Sahrens } 1161fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 1162fa9e4066Sahrens dmu_tx_commit(tx); 1163fa9e4066Sahrens } 1164fa9e4066Sahrens } 1165fa9e4066Sahrens out: 1166fa9e4066Sahrens 1167fa9e4066Sahrens if (dl) 1168fa9e4066Sahrens zfs_dirent_unlock(dl); 1169fa9e4066Sahrens 1170fa9e4066Sahrens if (error) { 1171fa9e4066Sahrens if (zp) 1172fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1173fa9e4066Sahrens } else { 1174fa9e4066Sahrens *vpp = ZTOV(zp); 1175fa9e4066Sahrens /* 1176fa9e4066Sahrens * If vnode is for a device return a specfs vnode instead. 1177fa9e4066Sahrens */ 1178fa9e4066Sahrens if (IS_DEVVP(*vpp)) { 1179fa9e4066Sahrens struct vnode *svp; 1180fa9e4066Sahrens 1181fa9e4066Sahrens svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1182fa9e4066Sahrens VN_RELE(*vpp); 1183fa9e4066Sahrens if (svp == NULL) { 1184fa9e4066Sahrens error = ENOSYS; 1185fa9e4066Sahrens } 1186fa9e4066Sahrens *vpp = svp; 1187fa9e4066Sahrens } 1188fa9e4066Sahrens } 1189fa9e4066Sahrens 1190fa9e4066Sahrens zil_commit(zilog, seq, 0); 1191fa9e4066Sahrens 1192fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1193fa9e4066Sahrens return (error); 1194fa9e4066Sahrens } 1195fa9e4066Sahrens 1196fa9e4066Sahrens /* 1197fa9e4066Sahrens * Remove an entry from a directory. 1198fa9e4066Sahrens * 1199fa9e4066Sahrens * IN: dvp - vnode of directory to remove entry from. 1200fa9e4066Sahrens * name - name of entry to remove. 1201fa9e4066Sahrens * cr - credentials of caller. 1202fa9e4066Sahrens * 1203fa9e4066Sahrens * RETURN: 0 if success 1204fa9e4066Sahrens * error code if failure 1205fa9e4066Sahrens * 1206fa9e4066Sahrens * Timestamps: 1207fa9e4066Sahrens * dvp - ctime|mtime 1208fa9e4066Sahrens * vp - ctime (if nlink > 0) 1209fa9e4066Sahrens */ 1210fa9e4066Sahrens static int 1211fa9e4066Sahrens zfs_remove(vnode_t *dvp, char *name, cred_t *cr) 1212fa9e4066Sahrens { 1213fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1214fa9e4066Sahrens znode_t *xzp = NULL; 1215fa9e4066Sahrens vnode_t *vp; 1216fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1217fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1218fa9e4066Sahrens uint64_t seq = 0; 1219fa9e4066Sahrens uint64_t acl_obj, xattr_obj; 1220fa9e4066Sahrens zfs_dirlock_t *dl; 1221fa9e4066Sahrens dmu_tx_t *tx; 1222fa9e4066Sahrens int may_delete_now, delete_now = FALSE; 1223fa9e4066Sahrens int reaped; 1224fa9e4066Sahrens int error; 1225fa9e4066Sahrens 1226fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1227fa9e4066Sahrens 1228fa9e4066Sahrens top: 1229fa9e4066Sahrens /* 1230fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1231fa9e4066Sahrens */ 1232fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZEXISTS)) { 1233fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1234fa9e4066Sahrens return (error); 1235fa9e4066Sahrens } 1236fa9e4066Sahrens 1237fa9e4066Sahrens vp = ZTOV(zp); 1238fa9e4066Sahrens 1239fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1240fa9e4066Sahrens goto out; 1241fa9e4066Sahrens } 1242fa9e4066Sahrens 1243fa9e4066Sahrens /* 1244fa9e4066Sahrens * Need to use rmdir for removing directories. 1245fa9e4066Sahrens */ 1246fa9e4066Sahrens if (vp->v_type == VDIR) { 1247fa9e4066Sahrens error = EPERM; 1248fa9e4066Sahrens goto out; 1249fa9e4066Sahrens } 1250fa9e4066Sahrens 1251fa9e4066Sahrens vnevent_remove(vp); 1252fa9e4066Sahrens 1253fa9e4066Sahrens mutex_enter(&vp->v_lock); 1254fa9e4066Sahrens may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1255fa9e4066Sahrens mutex_exit(&vp->v_lock); 1256fa9e4066Sahrens 1257fa9e4066Sahrens /* 1258fa9e4066Sahrens * We may delete the znode now, or we may put it on the delete queue; 1259fa9e4066Sahrens * it depends on whether we're the last link, and on whether there are 1260fa9e4066Sahrens * other holds on the vnode. So we dmu_tx_hold() the right things to 1261fa9e4066Sahrens * allow for either case. 1262fa9e4066Sahrens */ 1263fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1264fa9e4066Sahrens dmu_tx_hold_zap(tx, dzp->z_id, -1); 1265fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1266fa9e4066Sahrens if (may_delete_now) 1267fa9e4066Sahrens dmu_tx_hold_free(tx, zp->z_id, 0, DMU_OBJECT_END); 1268fa9e4066Sahrens 1269fa9e4066Sahrens /* are there any extended attributes? */ 1270fa9e4066Sahrens if ((xattr_obj = zp->z_phys->zp_xattr) != 0) { 1271fa9e4066Sahrens /* 1272fa9e4066Sahrens * XXX - There is a possibility that the delete 1273fa9e4066Sahrens * of the parent file could succeed, but then we get 1274fa9e4066Sahrens * an ENOSPC when we try to delete the xattrs... 1275fa9e4066Sahrens * so we would need to re-try the deletes periodically 1276fa9e4066Sahrens */ 1277fa9e4066Sahrens /* XXX - do we need this if we are deleting? */ 1278fa9e4066Sahrens dmu_tx_hold_bonus(tx, xattr_obj); 1279fa9e4066Sahrens } 1280fa9e4066Sahrens 1281fa9e4066Sahrens /* are there any additional acls */ 1282fa9e4066Sahrens if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 && 1283fa9e4066Sahrens may_delete_now) 1284fa9e4066Sahrens dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1285fa9e4066Sahrens 1286fa9e4066Sahrens /* charge as an update -- would be nice not to charge at all */ 1287fa9e4066Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_dqueue, -1); 1288fa9e4066Sahrens 1289fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1290fa9e4066Sahrens if (error) { 1291fa9e4066Sahrens dmu_tx_abort(tx); 1292fa9e4066Sahrens zfs_dirent_unlock(dl); 1293fa9e4066Sahrens VN_RELE(vp); 1294fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 1295fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 1296fa9e4066Sahrens goto top; 1297fa9e4066Sahrens } 1298fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1299fa9e4066Sahrens return (error); 1300fa9e4066Sahrens } 1301fa9e4066Sahrens 1302fa9e4066Sahrens /* 1303fa9e4066Sahrens * Remove the directory entry. 1304fa9e4066Sahrens */ 1305fa9e4066Sahrens error = zfs_link_destroy(dl, zp, tx, 0, &reaped); 1306fa9e4066Sahrens 1307fa9e4066Sahrens if (error) { 1308fa9e4066Sahrens dmu_tx_commit(tx); 1309fa9e4066Sahrens goto out; 1310fa9e4066Sahrens } 1311fa9e4066Sahrens 1312fa9e4066Sahrens if (reaped) { 1313fa9e4066Sahrens mutex_enter(&vp->v_lock); 1314fa9e4066Sahrens delete_now = may_delete_now && 1315fa9e4066Sahrens vp->v_count == 1 && !vn_has_cached_data(vp) && 1316fa9e4066Sahrens zp->z_phys->zp_xattr == xattr_obj && 1317fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj; 1318fa9e4066Sahrens mutex_exit(&vp->v_lock); 1319fa9e4066Sahrens } 1320fa9e4066Sahrens 1321fa9e4066Sahrens if (delete_now) { 1322fa9e4066Sahrens if (zp->z_phys->zp_xattr) { 1323fa9e4066Sahrens error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp); 1324fa9e4066Sahrens ASSERT3U(error, ==, 0); 1325fa9e4066Sahrens ASSERT3U(xzp->z_phys->zp_links, ==, 2); 1326fa9e4066Sahrens dmu_buf_will_dirty(xzp->z_dbuf, tx); 1327fa9e4066Sahrens mutex_enter(&xzp->z_lock); 1328fa9e4066Sahrens xzp->z_reap = 1; 1329fa9e4066Sahrens xzp->z_phys->zp_links = 0; 1330fa9e4066Sahrens mutex_exit(&xzp->z_lock); 1331fa9e4066Sahrens zfs_dq_add(xzp, tx); 1332fa9e4066Sahrens zp->z_phys->zp_xattr = 0; /* probably unnecessary */ 1333fa9e4066Sahrens } 1334fa9e4066Sahrens mutex_enter(&zp->z_lock); 1335fa9e4066Sahrens mutex_enter(&vp->v_lock); 1336fa9e4066Sahrens vp->v_count--; 1337fa9e4066Sahrens ASSERT3U(vp->v_count, ==, 0); 1338fa9e4066Sahrens mutex_exit(&vp->v_lock); 1339fa9e4066Sahrens zp->z_active = 0; 1340fa9e4066Sahrens mutex_exit(&zp->z_lock); 1341fa9e4066Sahrens zfs_znode_delete(zp, tx); 1342fa9e4066Sahrens VFS_RELE(zfsvfs->z_vfs); 1343fa9e4066Sahrens } else if (reaped) { 1344fa9e4066Sahrens zfs_dq_add(zp, tx); 1345fa9e4066Sahrens } 1346fa9e4066Sahrens 1347fa9e4066Sahrens seq = zfs_log_remove(zilog, tx, TX_REMOVE, dzp, name); 1348fa9e4066Sahrens 1349fa9e4066Sahrens dmu_tx_commit(tx); 1350fa9e4066Sahrens out: 1351fa9e4066Sahrens zfs_dirent_unlock(dl); 1352fa9e4066Sahrens 1353fa9e4066Sahrens if (!delete_now) { 1354fa9e4066Sahrens VN_RELE(vp); 1355fa9e4066Sahrens } else if (xzp) { 1356fa9e4066Sahrens /* this rele delayed to prevent nesting transactions */ 1357fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 1358fa9e4066Sahrens } 1359fa9e4066Sahrens 1360fa9e4066Sahrens zil_commit(zilog, seq, 0); 1361fa9e4066Sahrens 1362fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1363fa9e4066Sahrens return (error); 1364fa9e4066Sahrens } 1365fa9e4066Sahrens 1366fa9e4066Sahrens /* 1367fa9e4066Sahrens * Create a new directory and insert it into dvp using the name 1368fa9e4066Sahrens * provided. Return a pointer to the inserted directory. 1369fa9e4066Sahrens * 1370fa9e4066Sahrens * IN: dvp - vnode of directory to add subdir to. 1371fa9e4066Sahrens * dirname - name of new directory. 1372fa9e4066Sahrens * vap - attributes of new directory. 1373fa9e4066Sahrens * cr - credentials of caller. 1374fa9e4066Sahrens * 1375fa9e4066Sahrens * OUT: vpp - vnode of created directory. 1376fa9e4066Sahrens * 1377fa9e4066Sahrens * RETURN: 0 if success 1378fa9e4066Sahrens * error code if failure 1379fa9e4066Sahrens * 1380fa9e4066Sahrens * Timestamps: 1381fa9e4066Sahrens * dvp - ctime|mtime updated 1382fa9e4066Sahrens * vp - ctime|mtime|atime updated 1383fa9e4066Sahrens */ 1384fa9e4066Sahrens static int 1385fa9e4066Sahrens zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr) 1386fa9e4066Sahrens { 1387fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1388fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1389fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1390fa9e4066Sahrens uint64_t seq = 0; 1391fa9e4066Sahrens zfs_dirlock_t *dl; 1392fa9e4066Sahrens uint64_t zoid = 0; 1393fa9e4066Sahrens dmu_tx_t *tx; 1394fa9e4066Sahrens int error; 1395fa9e4066Sahrens 1396fa9e4066Sahrens ASSERT(vap->va_type == VDIR); 1397fa9e4066Sahrens 1398fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1399fa9e4066Sahrens 1400fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) { 1401fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1402fa9e4066Sahrens return (EINVAL); 1403fa9e4066Sahrens } 1404fa9e4066Sahrens top: 1405fa9e4066Sahrens *vpp = NULL; 1406fa9e4066Sahrens 1407fa9e4066Sahrens /* 1408fa9e4066Sahrens * First make sure the new directory doesn't exist. 1409fa9e4066Sahrens */ 1410fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, ZNEW)) { 1411fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1412fa9e4066Sahrens return (error); 1413fa9e4066Sahrens } 1414fa9e4066Sahrens 1415d2443e76Smarks if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, cr)) { 1416d2443e76Smarks zfs_dirent_unlock(dl); 1417d2443e76Smarks ZFS_EXIT(zfsvfs); 1418d2443e76Smarks return (error); 1419d2443e76Smarks } 1420d2443e76Smarks 1421fa9e4066Sahrens /* 1422fa9e4066Sahrens * Add a new entry to the directory. 1423fa9e4066Sahrens */ 1424fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1425fa9e4066Sahrens dmu_tx_hold_zap(tx, dzp->z_id, 1); 1426fa9e4066Sahrens dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, 0); 1427fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 1428fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1429fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1430fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1431fa9e4066Sahrens if (error) { 1432fa9e4066Sahrens dmu_tx_abort(tx); 1433fa9e4066Sahrens zfs_dirent_unlock(dl); 1434fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 1435fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 1436fa9e4066Sahrens goto top; 1437fa9e4066Sahrens } 1438fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1439fa9e4066Sahrens return (error); 1440fa9e4066Sahrens } 1441fa9e4066Sahrens 1442fa9e4066Sahrens /* 1443fa9e4066Sahrens * Create new node. 1444fa9e4066Sahrens */ 1445fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); 1446fa9e4066Sahrens 1447fa9e4066Sahrens /* 1448fa9e4066Sahrens * Now put new name in parent dir. 1449fa9e4066Sahrens */ 1450fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1451fa9e4066Sahrens 1452fa9e4066Sahrens *vpp = ZTOV(zp); 1453fa9e4066Sahrens 1454fa9e4066Sahrens seq = zfs_log_create(zilog, tx, TX_MKDIR, dzp, zp, dirname); 1455fa9e4066Sahrens dmu_tx_commit(tx); 1456fa9e4066Sahrens 1457fa9e4066Sahrens zfs_dirent_unlock(dl); 1458fa9e4066Sahrens 1459fa9e4066Sahrens zil_commit(zilog, seq, 0); 1460fa9e4066Sahrens 1461fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1462fa9e4066Sahrens return (0); 1463fa9e4066Sahrens } 1464fa9e4066Sahrens 1465fa9e4066Sahrens /* 1466fa9e4066Sahrens * Remove a directory subdir entry. If the current working 1467fa9e4066Sahrens * directory is the same as the subdir to be removed, the 1468fa9e4066Sahrens * remove will fail. 1469fa9e4066Sahrens * 1470fa9e4066Sahrens * IN: dvp - vnode of directory to remove from. 1471fa9e4066Sahrens * name - name of directory to be removed. 1472fa9e4066Sahrens * cwd - vnode of current working directory. 1473fa9e4066Sahrens * cr - credentials of caller. 1474fa9e4066Sahrens * 1475fa9e4066Sahrens * RETURN: 0 if success 1476fa9e4066Sahrens * error code if failure 1477fa9e4066Sahrens * 1478fa9e4066Sahrens * Timestamps: 1479fa9e4066Sahrens * dvp - ctime|mtime updated 1480fa9e4066Sahrens */ 1481fa9e4066Sahrens static int 1482fa9e4066Sahrens zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr) 1483fa9e4066Sahrens { 1484fa9e4066Sahrens znode_t *dzp = VTOZ(dvp); 1485fa9e4066Sahrens znode_t *zp; 1486fa9e4066Sahrens vnode_t *vp; 1487fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1488fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1489fa9e4066Sahrens uint64_t seq = 0; 1490fa9e4066Sahrens zfs_dirlock_t *dl; 1491fa9e4066Sahrens dmu_tx_t *tx; 1492fa9e4066Sahrens int error; 1493fa9e4066Sahrens 1494fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1495fa9e4066Sahrens 1496fa9e4066Sahrens top: 1497fa9e4066Sahrens zp = NULL; 1498fa9e4066Sahrens 1499fa9e4066Sahrens /* 1500fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1501fa9e4066Sahrens */ 1502fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZEXISTS)) { 1503fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1504fa9e4066Sahrens return (error); 1505fa9e4066Sahrens } 1506fa9e4066Sahrens 1507fa9e4066Sahrens vp = ZTOV(zp); 1508fa9e4066Sahrens 1509fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1510fa9e4066Sahrens goto out; 1511fa9e4066Sahrens } 1512fa9e4066Sahrens 1513fa9e4066Sahrens if (vp->v_type != VDIR) { 1514fa9e4066Sahrens error = ENOTDIR; 1515fa9e4066Sahrens goto out; 1516fa9e4066Sahrens } 1517fa9e4066Sahrens 1518fa9e4066Sahrens if (vp == cwd) { 1519fa9e4066Sahrens error = EINVAL; 1520fa9e4066Sahrens goto out; 1521fa9e4066Sahrens } 1522fa9e4066Sahrens 1523fa9e4066Sahrens vnevent_rmdir(vp); 1524fa9e4066Sahrens 1525fa9e4066Sahrens /* 1526fa9e4066Sahrens * Grab a lock on the parent pointer make sure we play well 1527fa9e4066Sahrens * with the treewalk and directory rename code. 1528fa9e4066Sahrens */ 1529fa9e4066Sahrens rw_enter(&zp->z_parent_lock, RW_WRITER); 1530fa9e4066Sahrens 1531fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1532fa9e4066Sahrens dmu_tx_hold_zap(tx, dzp->z_id, 1); 1533fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1534fa9e4066Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_dqueue, 1); 1535fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 1536fa9e4066Sahrens if (error) { 1537fa9e4066Sahrens dmu_tx_abort(tx); 1538fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1539fa9e4066Sahrens zfs_dirent_unlock(dl); 1540fa9e4066Sahrens VN_RELE(vp); 1541fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 1542fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 1543fa9e4066Sahrens goto top; 1544fa9e4066Sahrens } 1545fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1546fa9e4066Sahrens return (error); 1547fa9e4066Sahrens } 1548fa9e4066Sahrens 1549fa9e4066Sahrens error = zfs_link_destroy(dl, zp, tx, 0, NULL); 1550fa9e4066Sahrens 1551fa9e4066Sahrens if (error == 0) 1552fa9e4066Sahrens seq = zfs_log_remove(zilog, tx, TX_RMDIR, dzp, name); 1553fa9e4066Sahrens 1554fa9e4066Sahrens dmu_tx_commit(tx); 1555fa9e4066Sahrens 1556fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1557fa9e4066Sahrens out: 1558fa9e4066Sahrens zfs_dirent_unlock(dl); 1559fa9e4066Sahrens 1560fa9e4066Sahrens VN_RELE(vp); 1561fa9e4066Sahrens 1562fa9e4066Sahrens zil_commit(zilog, seq, 0); 1563fa9e4066Sahrens 1564fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1565fa9e4066Sahrens return (error); 1566fa9e4066Sahrens } 1567fa9e4066Sahrens 1568fa9e4066Sahrens /* 1569fa9e4066Sahrens * Read as many directory entries as will fit into the provided 1570fa9e4066Sahrens * buffer from the given directory cursor position (specified in 1571fa9e4066Sahrens * the uio structure. 1572fa9e4066Sahrens * 1573fa9e4066Sahrens * IN: vp - vnode of directory to read. 1574fa9e4066Sahrens * uio - structure supplying read location, range info, 1575fa9e4066Sahrens * and return buffer. 1576fa9e4066Sahrens * cr - credentials of caller. 1577fa9e4066Sahrens * 1578fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 1579fa9e4066Sahrens * eofp - set to true if end-of-file detected. 1580fa9e4066Sahrens * 1581fa9e4066Sahrens * RETURN: 0 if success 1582fa9e4066Sahrens * error code if failure 1583fa9e4066Sahrens * 1584fa9e4066Sahrens * Timestamps: 1585fa9e4066Sahrens * vp - atime updated 1586fa9e4066Sahrens * 1587fa9e4066Sahrens * Note that the low 4 bits of the cookie returned by zap is always zero. 1588fa9e4066Sahrens * This allows us to use the low range for "special" directory entries: 1589fa9e4066Sahrens * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 1590fa9e4066Sahrens * we use the offset 2 for the '.zfs' directory. 1591fa9e4066Sahrens */ 1592fa9e4066Sahrens /* ARGSUSED */ 1593fa9e4066Sahrens static int 1594fa9e4066Sahrens zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp) 1595fa9e4066Sahrens { 1596fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1597fa9e4066Sahrens iovec_t *iovp; 1598fa9e4066Sahrens dirent64_t *odp; 1599fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 16007f6e3e7dSperrin objset_t *os; 1601fa9e4066Sahrens caddr_t outbuf; 1602fa9e4066Sahrens size_t bufsize; 1603fa9e4066Sahrens zap_cursor_t zc; 1604fa9e4066Sahrens zap_attribute_t zap; 1605fa9e4066Sahrens uint_t bytes_wanted; 1606fa9e4066Sahrens ushort_t this_reclen; 1607fa9e4066Sahrens uint64_t offset; /* must be unsigned; checks for < 1 */ 1608fa9e4066Sahrens off64_t *next; 1609fa9e4066Sahrens int local_eof; 16107f6e3e7dSperrin int outcount; 16117f6e3e7dSperrin int error; 16127f6e3e7dSperrin uint8_t prefetch; 1613fa9e4066Sahrens 1614fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1615fa9e4066Sahrens 1616fa9e4066Sahrens /* 1617fa9e4066Sahrens * If we are not given an eof variable, 1618fa9e4066Sahrens * use a local one. 1619fa9e4066Sahrens */ 1620fa9e4066Sahrens if (eofp == NULL) 1621fa9e4066Sahrens eofp = &local_eof; 1622fa9e4066Sahrens 1623fa9e4066Sahrens /* 1624fa9e4066Sahrens * Check for valid iov_len. 1625fa9e4066Sahrens */ 1626fa9e4066Sahrens if (uio->uio_iov->iov_len <= 0) { 1627fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1628fa9e4066Sahrens return (EINVAL); 1629fa9e4066Sahrens } 1630fa9e4066Sahrens 1631fa9e4066Sahrens /* 1632fa9e4066Sahrens * Quit if directory has been removed (posix) 1633fa9e4066Sahrens */ 1634fa9e4066Sahrens if ((*eofp = zp->z_reap) != 0) { 1635fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1636fa9e4066Sahrens return (0); 1637fa9e4066Sahrens } 1638fa9e4066Sahrens 16397f6e3e7dSperrin error = 0; 16407f6e3e7dSperrin os = zfsvfs->z_os; 16417f6e3e7dSperrin offset = uio->uio_loffset; 16427f6e3e7dSperrin prefetch = zp->z_zn_prefetch; 16437f6e3e7dSperrin 1644fa9e4066Sahrens /* 1645fa9e4066Sahrens * Initialize the iterator cursor. 1646fa9e4066Sahrens */ 1647fa9e4066Sahrens if (offset <= 3) { 1648fa9e4066Sahrens /* 1649fa9e4066Sahrens * Start iteration from the beginning of the directory. 1650fa9e4066Sahrens */ 16517f6e3e7dSperrin zap_cursor_init(&zc, os, zp->z_id); 1652fa9e4066Sahrens } else { 1653fa9e4066Sahrens /* 1654fa9e4066Sahrens * The offset is a serialized cursor. 1655fa9e4066Sahrens */ 16567f6e3e7dSperrin zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 1657fa9e4066Sahrens } 1658fa9e4066Sahrens 1659fa9e4066Sahrens /* 1660fa9e4066Sahrens * Get space to change directory entries into fs independent format. 1661fa9e4066Sahrens */ 1662fa9e4066Sahrens iovp = uio->uio_iov; 1663fa9e4066Sahrens bytes_wanted = iovp->iov_len; 1664fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 1665fa9e4066Sahrens bufsize = bytes_wanted; 1666fa9e4066Sahrens outbuf = kmem_alloc(bufsize, KM_SLEEP); 1667fa9e4066Sahrens odp = (struct dirent64 *)outbuf; 1668fa9e4066Sahrens } else { 1669fa9e4066Sahrens bufsize = bytes_wanted; 1670fa9e4066Sahrens odp = (struct dirent64 *)iovp->iov_base; 1671fa9e4066Sahrens } 1672fa9e4066Sahrens 1673fa9e4066Sahrens /* 1674fa9e4066Sahrens * Transform to file-system independent format 1675fa9e4066Sahrens */ 1676fa9e4066Sahrens outcount = 0; 1677fa9e4066Sahrens while (outcount < bytes_wanted) { 1678fa9e4066Sahrens /* 1679fa9e4066Sahrens * Special case `.', `..', and `.zfs'. 1680fa9e4066Sahrens */ 1681fa9e4066Sahrens if (offset == 0) { 1682fa9e4066Sahrens (void) strcpy(zap.za_name, "."); 1683fa9e4066Sahrens zap.za_first_integer = zp->z_id; 1684fa9e4066Sahrens this_reclen = DIRENT64_RECLEN(1); 1685fa9e4066Sahrens } else if (offset == 1) { 1686fa9e4066Sahrens (void) strcpy(zap.za_name, ".."); 1687fa9e4066Sahrens zap.za_first_integer = zp->z_phys->zp_parent; 1688fa9e4066Sahrens this_reclen = DIRENT64_RECLEN(2); 1689fa9e4066Sahrens } else if (offset == 2 && zfs_show_ctldir(zp)) { 1690fa9e4066Sahrens (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 1691fa9e4066Sahrens zap.za_first_integer = ZFSCTL_INO_ROOT; 1692fa9e4066Sahrens this_reclen = 1693fa9e4066Sahrens DIRENT64_RECLEN(sizeof (ZFS_CTLDIR_NAME) - 1); 1694fa9e4066Sahrens } else { 1695fa9e4066Sahrens /* 1696fa9e4066Sahrens * Grab next entry. 1697fa9e4066Sahrens */ 1698fa9e4066Sahrens if (error = zap_cursor_retrieve(&zc, &zap)) { 1699fa9e4066Sahrens if ((*eofp = (error == ENOENT)) != 0) 1700fa9e4066Sahrens break; 1701fa9e4066Sahrens else 1702fa9e4066Sahrens goto update; 1703fa9e4066Sahrens } 1704fa9e4066Sahrens 1705fa9e4066Sahrens if (zap.za_integer_length != 8 || 1706fa9e4066Sahrens zap.za_num_integers != 1) { 1707fa9e4066Sahrens cmn_err(CE_WARN, "zap_readdir: bad directory " 1708fa9e4066Sahrens "entry, obj = %lld, offset = %lld\n", 1709fa9e4066Sahrens (u_longlong_t)zp->z_id, 1710fa9e4066Sahrens (u_longlong_t)offset); 1711fa9e4066Sahrens error = ENXIO; 1712fa9e4066Sahrens goto update; 1713fa9e4066Sahrens } 1714fa9e4066Sahrens this_reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 1715fa9e4066Sahrens } 1716fa9e4066Sahrens 1717fa9e4066Sahrens /* 1718fa9e4066Sahrens * Will this entry fit in the buffer? 1719fa9e4066Sahrens */ 1720fa9e4066Sahrens if (outcount + this_reclen > bufsize) { 1721fa9e4066Sahrens /* 1722fa9e4066Sahrens * Did we manage to fit anything in the buffer? 1723fa9e4066Sahrens */ 1724fa9e4066Sahrens if (!outcount) { 1725fa9e4066Sahrens error = EINVAL; 1726fa9e4066Sahrens goto update; 1727fa9e4066Sahrens } 1728fa9e4066Sahrens break; 1729fa9e4066Sahrens } 1730fa9e4066Sahrens /* 1731fa9e4066Sahrens * Add this entry: 1732fa9e4066Sahrens */ 1733fa9e4066Sahrens odp->d_ino = (ino64_t)zap.za_first_integer; 1734fa9e4066Sahrens odp->d_reclen = (ushort_t)this_reclen; 1735fa9e4066Sahrens /* NOTE: d_off is the offset for the *next* entry */ 1736fa9e4066Sahrens next = &(odp->d_off); 1737fa9e4066Sahrens (void) strncpy(odp->d_name, zap.za_name, 1738fa9e4066Sahrens DIRENT64_NAMELEN(this_reclen)); 1739fa9e4066Sahrens outcount += this_reclen; 1740fa9e4066Sahrens odp = (dirent64_t *)((intptr_t)odp + this_reclen); 1741fa9e4066Sahrens 1742fa9e4066Sahrens ASSERT(outcount <= bufsize); 1743fa9e4066Sahrens 1744fa9e4066Sahrens /* Prefetch znode */ 17457f6e3e7dSperrin if (prefetch) 17467f6e3e7dSperrin dmu_prefetch(os, zap.za_first_integer, 0, 0); 1747fa9e4066Sahrens 1748fa9e4066Sahrens /* 1749fa9e4066Sahrens * Move to the next entry, fill in the previous offset. 1750fa9e4066Sahrens */ 1751fa9e4066Sahrens if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 1752fa9e4066Sahrens zap_cursor_advance(&zc); 1753fa9e4066Sahrens offset = zap_cursor_serialize(&zc); 1754fa9e4066Sahrens } else { 1755fa9e4066Sahrens offset += 1; 1756fa9e4066Sahrens } 1757fa9e4066Sahrens *next = offset; 1758fa9e4066Sahrens } 17597f6e3e7dSperrin zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 1760fa9e4066Sahrens 1761fa9e4066Sahrens if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 1762fa9e4066Sahrens iovp->iov_base += outcount; 1763fa9e4066Sahrens iovp->iov_len -= outcount; 1764fa9e4066Sahrens uio->uio_resid -= outcount; 1765fa9e4066Sahrens } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 1766fa9e4066Sahrens /* 1767fa9e4066Sahrens * Reset the pointer. 1768fa9e4066Sahrens */ 1769fa9e4066Sahrens offset = uio->uio_loffset; 1770fa9e4066Sahrens } 1771fa9e4066Sahrens 1772fa9e4066Sahrens update: 177387e5029aSahrens zap_cursor_fini(&zc); 1774fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1775fa9e4066Sahrens kmem_free(outbuf, bufsize); 1776fa9e4066Sahrens 1777fa9e4066Sahrens if (error == ENOENT) 1778fa9e4066Sahrens error = 0; 1779fa9e4066Sahrens 1780fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 1781fa9e4066Sahrens 1782fa9e4066Sahrens uio->uio_loffset = offset; 1783fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1784fa9e4066Sahrens return (error); 1785fa9e4066Sahrens } 1786fa9e4066Sahrens 1787fa9e4066Sahrens /* ARGSUSED */ 1788fa9e4066Sahrens static int 1789fa9e4066Sahrens zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr) 1790fa9e4066Sahrens { 1791fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1792fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1793fa9e4066Sahrens 1794fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1795fa9e4066Sahrens zil_commit(zfsvfs->z_log, zp->z_last_itx, FSYNC); 1796fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1797fa9e4066Sahrens return (0); 1798fa9e4066Sahrens } 1799fa9e4066Sahrens 1800fa9e4066Sahrens /* 1801fa9e4066Sahrens * Get the requested file attributes and place them in the provided 1802fa9e4066Sahrens * vattr structure. 1803fa9e4066Sahrens * 1804fa9e4066Sahrens * IN: vp - vnode of file. 1805fa9e4066Sahrens * vap - va_mask identifies requested attributes. 1806fa9e4066Sahrens * flags - [UNUSED] 1807fa9e4066Sahrens * cr - credentials of caller. 1808fa9e4066Sahrens * 1809fa9e4066Sahrens * OUT: vap - attribute values. 1810fa9e4066Sahrens * 1811fa9e4066Sahrens * RETURN: 0 (always succeeds) 1812fa9e4066Sahrens */ 1813fa9e4066Sahrens /* ARGSUSED */ 1814fa9e4066Sahrens static int 1815fa9e4066Sahrens zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr) 1816fa9e4066Sahrens { 1817fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1818fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1819fa9e4066Sahrens znode_phys_t *pzp = zp->z_phys; 1820fa9e4066Sahrens int error; 1821fa9e4066Sahrens 1822fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1823fa9e4066Sahrens 1824fa9e4066Sahrens /* 1825fa9e4066Sahrens * Return all attributes. It's cheaper to provide the answer 1826fa9e4066Sahrens * than to determine whether we were asked the question. 1827fa9e4066Sahrens */ 1828fa9e4066Sahrens mutex_enter(&zp->z_lock); 1829fa9e4066Sahrens 1830fa9e4066Sahrens vap->va_type = vp->v_type; 1831fa9e4066Sahrens vap->va_mode = pzp->zp_mode & MODEMASK; 1832fa9e4066Sahrens vap->va_uid = zp->z_phys->zp_uid; 1833fa9e4066Sahrens vap->va_gid = zp->z_phys->zp_gid; 1834fa9e4066Sahrens vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 1835fa9e4066Sahrens vap->va_nodeid = zp->z_id; 1836fa9e4066Sahrens vap->va_nlink = MIN(pzp->zp_links, UINT32_MAX); /* nlink_t limit! */ 1837fa9e4066Sahrens vap->va_size = pzp->zp_size; 1838fa9e4066Sahrens vap->va_rdev = pzp->zp_rdev; 1839fa9e4066Sahrens vap->va_seq = zp->z_seq; 1840fa9e4066Sahrens 1841fa9e4066Sahrens ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime); 1842fa9e4066Sahrens ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime); 1843fa9e4066Sahrens ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime); 1844fa9e4066Sahrens 1845fa9e4066Sahrens /* 1846de122929Smarks * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 1847de122929Smarks * Also, if we are the owner don't bother, since owner should 1848de122929Smarks * always be allowed to read basic attributes of file. 1849fa9e4066Sahrens */ 1850de122929Smarks if (!(zp->z_phys->zp_flags & ZFS_ACL_TRIVIAL) && 1851de122929Smarks (zp->z_phys->zp_uid != crgetuid(cr))) { 1852de122929Smarks if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, cr)) { 1853fa9e4066Sahrens mutex_exit(&zp->z_lock); 1854fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1855fa9e4066Sahrens return (error); 1856fa9e4066Sahrens } 1857fa9e4066Sahrens } 1858fa9e4066Sahrens 1859fa9e4066Sahrens mutex_exit(&zp->z_lock); 1860fa9e4066Sahrens 1861fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks); 1862fa9e4066Sahrens 1863fa9e4066Sahrens if (zp->z_blksz == 0) { 1864fa9e4066Sahrens /* 1865fa9e4066Sahrens * Block size hasn't been set; suggest maximal I/O transfers. 1866fa9e4066Sahrens */ 1867fa9e4066Sahrens vap->va_blksize = zfsvfs->z_max_blksz; 1868fa9e4066Sahrens } 1869fa9e4066Sahrens 1870fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1871fa9e4066Sahrens return (0); 1872fa9e4066Sahrens } 1873fa9e4066Sahrens 1874fa9e4066Sahrens /* 1875fa9e4066Sahrens * Set the file attributes to the values contained in the 1876fa9e4066Sahrens * vattr structure. 1877fa9e4066Sahrens * 1878fa9e4066Sahrens * IN: vp - vnode of file to be modified. 1879fa9e4066Sahrens * vap - new attribute values. 1880fa9e4066Sahrens * flags - ATTR_UTIME set if non-default time values provided. 1881fa9e4066Sahrens * cr - credentials of caller. 1882fa9e4066Sahrens * 1883fa9e4066Sahrens * RETURN: 0 if success 1884fa9e4066Sahrens * error code if failure 1885fa9e4066Sahrens * 1886fa9e4066Sahrens * Timestamps: 1887fa9e4066Sahrens * vp - ctime updated, mtime updated if size changed. 1888fa9e4066Sahrens */ 1889fa9e4066Sahrens /* ARGSUSED */ 1890fa9e4066Sahrens static int 1891fa9e4066Sahrens zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 1892fa9e4066Sahrens caller_context_t *ct) 1893fa9e4066Sahrens { 1894fa9e4066Sahrens struct znode *zp = VTOZ(vp); 1895fa9e4066Sahrens znode_phys_t *pzp = zp->z_phys; 1896fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1897fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 1898fa9e4066Sahrens uint64_t seq = 0; 1899fa9e4066Sahrens dmu_tx_t *tx; 1900fa9e4066Sahrens uint_t mask = vap->va_mask; 1901fa9e4066Sahrens uint_t mask_applied = 0; 1902fa9e4066Sahrens vattr_t oldva; 190313f9f30eSmarks int trim_mask = FALSE; 190413f9f30eSmarks int saved_mask; 1905fa9e4066Sahrens uint64_t new_mode; 1906d2443e76Smarks znode_t *attrzp; 1907fa9e4066Sahrens int have_grow_lock; 1908fa9e4066Sahrens int need_policy = FALSE; 1909fa9e4066Sahrens int err; 1910fa9e4066Sahrens 1911fa9e4066Sahrens if (mask == 0) 1912fa9e4066Sahrens return (0); 1913fa9e4066Sahrens 1914fa9e4066Sahrens if (mask & AT_NOSET) 1915fa9e4066Sahrens return (EINVAL); 1916fa9e4066Sahrens 1917fa9e4066Sahrens if (mask & AT_SIZE && vp->v_type == VDIR) 1918fa9e4066Sahrens return (EISDIR); 1919fa9e4066Sahrens 19208ef9dde0Smarks if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) 192184c5a155Smarks return (EINVAL); 192284c5a155Smarks 1923fa9e4066Sahrens ZFS_ENTER(zfsvfs); 1924fa9e4066Sahrens 1925fa9e4066Sahrens top: 1926fa9e4066Sahrens have_grow_lock = FALSE; 1927d2443e76Smarks attrzp = NULL; 1928fa9e4066Sahrens 1929fa9e4066Sahrens if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 1930fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1931fa9e4066Sahrens return (EROFS); 1932fa9e4066Sahrens } 1933fa9e4066Sahrens 1934fa9e4066Sahrens /* 1935fa9e4066Sahrens * First validate permissions 1936fa9e4066Sahrens */ 1937fa9e4066Sahrens 1938fa9e4066Sahrens if (mask & AT_SIZE) { 1939fa9e4066Sahrens err = zfs_zaccess(zp, ACE_WRITE_DATA, cr); 1940fa9e4066Sahrens if (err) { 1941fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1942fa9e4066Sahrens return (err); 1943fa9e4066Sahrens } 1944fa9e4066Sahrens } 1945fa9e4066Sahrens 1946fa9e4066Sahrens if (mask & (AT_ATIME|AT_MTIME)) 1947fa9e4066Sahrens need_policy = zfs_zaccess_v4_perm(zp, ACE_WRITE_ATTRIBUTES, cr); 1948fa9e4066Sahrens 1949fa9e4066Sahrens if (mask & (AT_UID|AT_GID)) { 1950fa9e4066Sahrens int idmask = (mask & (AT_UID|AT_GID)); 1951fa9e4066Sahrens int take_owner; 1952fa9e4066Sahrens int take_group; 1953fa9e4066Sahrens 1954a933bc41Smarks /* 1955a933bc41Smarks * NOTE: even if a new mode is being set, 1956a933bc41Smarks * we may clear S_ISUID/S_ISGID bits. 1957a933bc41Smarks */ 1958a933bc41Smarks 1959a933bc41Smarks if (!(mask & AT_MODE)) 1960a933bc41Smarks vap->va_mode = pzp->zp_mode; 1961a933bc41Smarks 1962fa9e4066Sahrens /* 1963fa9e4066Sahrens * Take ownership or chgrp to group we are a member of 1964fa9e4066Sahrens */ 1965fa9e4066Sahrens 1966fa9e4066Sahrens take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 1967fa9e4066Sahrens take_group = (mask & AT_GID) && groupmember(vap->va_gid, cr); 1968fa9e4066Sahrens 1969fa9e4066Sahrens /* 1970fa9e4066Sahrens * If both AT_UID and AT_GID are set then take_owner and 1971fa9e4066Sahrens * take_group must both be set in order to allow taking 1972fa9e4066Sahrens * ownership. 1973fa9e4066Sahrens * 1974fa9e4066Sahrens * Otherwise, send the check through secpolicy_vnode_setattr() 1975fa9e4066Sahrens * 1976fa9e4066Sahrens */ 1977fa9e4066Sahrens 1978fa9e4066Sahrens if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 1979fa9e4066Sahrens ((idmask == AT_UID) && take_owner) || 1980fa9e4066Sahrens ((idmask == AT_GID) && take_group)) { 1981fa9e4066Sahrens if (zfs_zaccess_v4_perm(zp, ACE_WRITE_OWNER, cr) == 0) { 1982fa9e4066Sahrens /* 1983fa9e4066Sahrens * Remove setuid/setgid for non-privileged users 1984fa9e4066Sahrens */ 198513f9f30eSmarks secpolicy_setid_clear(vap, cr); 198613f9f30eSmarks trim_mask = TRUE; 198713f9f30eSmarks saved_mask = vap->va_mask; 1988fa9e4066Sahrens } else { 1989fa9e4066Sahrens need_policy = TRUE; 1990fa9e4066Sahrens } 1991fa9e4066Sahrens } else { 1992fa9e4066Sahrens need_policy = TRUE; 1993fa9e4066Sahrens } 1994fa9e4066Sahrens } 1995fa9e4066Sahrens 1996fa9e4066Sahrens if (mask & AT_MODE) 1997fa9e4066Sahrens need_policy = TRUE; 1998fa9e4066Sahrens 1999fa9e4066Sahrens if (need_policy) { 2000fa9e4066Sahrens mutex_enter(&zp->z_lock); 2001fa9e4066Sahrens oldva.va_mode = pzp->zp_mode; 2002fa9e4066Sahrens oldva.va_uid = zp->z_phys->zp_uid; 2003fa9e4066Sahrens oldva.va_gid = zp->z_phys->zp_gid; 2004fa9e4066Sahrens mutex_exit(&zp->z_lock); 200513f9f30eSmarks 200613f9f30eSmarks /* 200713f9f30eSmarks * If trim_mask is set then take ownership 200813f9f30eSmarks * has been granted. In that case remove 200913f9f30eSmarks * UID|GID from mask so that 201013f9f30eSmarks * secpolicy_vnode_setattr() doesn't revoke it. 201113f9f30eSmarks */ 201213f9f30eSmarks if (trim_mask) 201313f9f30eSmarks vap->va_mask &= ~(AT_UID|AT_GID); 201413f9f30eSmarks 2015fa9e4066Sahrens err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 2016fa9e4066Sahrens (int (*)(void *, int, cred_t *))zfs_zaccess_rwx, zp); 2017fa9e4066Sahrens if (err) { 2018fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2019fa9e4066Sahrens return (err); 2020fa9e4066Sahrens } 202113f9f30eSmarks 202213f9f30eSmarks if (trim_mask) 202313f9f30eSmarks vap->va_mask |= (saved_mask & (AT_UID|AT_GID)); 2024fa9e4066Sahrens } 2025fa9e4066Sahrens 2026fa9e4066Sahrens /* 2027fa9e4066Sahrens * secpolicy_vnode_setattr, or take ownership may have 2028fa9e4066Sahrens * changed va_mask 2029fa9e4066Sahrens */ 2030fa9e4066Sahrens mask = vap->va_mask; 2031fa9e4066Sahrens 2032fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2033fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 2034fa9e4066Sahrens 2035fa9e4066Sahrens if (mask & AT_MODE) { 2036fa9e4066Sahrens 2037fa9e4066Sahrens new_mode = (pzp->zp_mode & S_IFMT) | (vap->va_mode & ~S_IFMT); 2038fa9e4066Sahrens 2039fa9e4066Sahrens if (zp->z_phys->zp_acl.z_acl_extern_obj) 2040fa9e4066Sahrens dmu_tx_hold_write(tx, 2041fa9e4066Sahrens pzp->zp_acl.z_acl_extern_obj, 0, SPA_MAXBLOCKSIZE); 2042fa9e4066Sahrens else 2043fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 2044fa9e4066Sahrens 0, ZFS_ACL_SIZE(MAX_ACL_SIZE)); 2045fa9e4066Sahrens } 2046fa9e4066Sahrens 2047fa9e4066Sahrens if (mask & AT_SIZE) { 2048fa9e4066Sahrens uint64_t off = vap->va_size; 2049fa9e4066Sahrens /* 2050fa9e4066Sahrens * Grab the grow_lock to serialize this change with 2051fa9e4066Sahrens * respect to other file manipulations. 2052fa9e4066Sahrens */ 2053fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_WRITER); 2054fa9e4066Sahrens have_grow_lock = TRUE; 2055fa9e4066Sahrens if (off < zp->z_phys->zp_size) 2056fa9e4066Sahrens dmu_tx_hold_free(tx, zp->z_id, off, DMU_OBJECT_END); 2057fa9e4066Sahrens else if (zp->z_phys->zp_size && 2058fa9e4066Sahrens zp->z_blksz < zfsvfs->z_max_blksz && off > zp->z_blksz) 2059fa9e4066Sahrens /* we will rewrite this block if we grow */ 2060fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, 0, zp->z_phys->zp_size); 2061fa9e4066Sahrens } 2062fa9e4066Sahrens 2063d2443e76Smarks if ((mask & (AT_UID | AT_GID)) && zp->z_phys->zp_xattr != 0) { 2064d2443e76Smarks err = zfs_zget(zp->z_zfsvfs, zp->z_phys->zp_xattr, &attrzp); 2065d2443e76Smarks if (err) { 2066d2443e76Smarks dmu_tx_abort(tx); 2067d2443e76Smarks if (have_grow_lock) 2068d2443e76Smarks rw_exit(&zp->z_grow_lock); 2069d2443e76Smarks ZFS_EXIT(zfsvfs); 2070d2443e76Smarks return (err); 2071d2443e76Smarks } 2072d2443e76Smarks dmu_tx_hold_bonus(tx, attrzp->z_id); 2073d2443e76Smarks } 2074d2443e76Smarks 2075fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 2076fa9e4066Sahrens if (err) { 2077d2443e76Smarks if (attrzp) 2078d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2079fa9e4066Sahrens dmu_tx_abort(tx); 2080fa9e4066Sahrens if (have_grow_lock) 2081fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 2082fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 2083fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 2084fa9e4066Sahrens goto top; 2085fa9e4066Sahrens } 2086fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2087fa9e4066Sahrens return (err); 2088fa9e4066Sahrens } 2089fa9e4066Sahrens 2090fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 2091fa9e4066Sahrens 2092fa9e4066Sahrens /* 2093fa9e4066Sahrens * Set each attribute requested. 2094fa9e4066Sahrens * We group settings according to the locks they need to acquire. 2095fa9e4066Sahrens * 2096fa9e4066Sahrens * Note: you cannot set ctime directly, although it will be 2097fa9e4066Sahrens * updated as a side-effect of calling this function. 2098fa9e4066Sahrens */ 2099fa9e4066Sahrens if (mask & AT_SIZE) { 2100fa9e4066Sahrens /* 2101fa9e4066Sahrens * XXX - Note, we are not providing any open 2102fa9e4066Sahrens * mode flags here (like FNDELAY), so we may 2103fa9e4066Sahrens * block if there are locks present... this 2104fa9e4066Sahrens * should be addressed in openat(). 2105fa9e4066Sahrens */ 2106fa9e4066Sahrens err = zfs_freesp(zp, vap->va_size, 0, 0, tx, cr); 2107fa9e4066Sahrens if (err) { 2108fa9e4066Sahrens mutex_enter(&zp->z_lock); 2109fa9e4066Sahrens goto out; 2110fa9e4066Sahrens } 2111fa9e4066Sahrens mask_applied |= AT_SIZE; 2112fa9e4066Sahrens } 2113fa9e4066Sahrens 2114fa9e4066Sahrens mask_applied = mask; /* no errors after this point */ 2115fa9e4066Sahrens 2116fa9e4066Sahrens mutex_enter(&zp->z_lock); 2117fa9e4066Sahrens 2118fa9e4066Sahrens if (mask & AT_MODE) { 2119fa9e4066Sahrens err = zfs_acl_chmod_setattr(zp, new_mode, tx); 2120fa9e4066Sahrens ASSERT3U(err, ==, 0); 2121fa9e4066Sahrens } 2122fa9e4066Sahrens 2123d2443e76Smarks if (attrzp) 2124d2443e76Smarks mutex_enter(&attrzp->z_lock); 2125d2443e76Smarks 2126d2443e76Smarks if (mask & AT_UID) { 2127fa9e4066Sahrens zp->z_phys->zp_uid = (uint64_t)vap->va_uid; 2128d2443e76Smarks if (attrzp) { 2129d2443e76Smarks attrzp->z_phys->zp_uid = (uint64_t)vap->va_uid; 2130d2443e76Smarks } 2131d2443e76Smarks } 2132fa9e4066Sahrens 2133d2443e76Smarks if (mask & AT_GID) { 2134fa9e4066Sahrens zp->z_phys->zp_gid = (uint64_t)vap->va_gid; 2135d2443e76Smarks if (attrzp) 2136d2443e76Smarks attrzp->z_phys->zp_gid = (uint64_t)vap->va_gid; 2137d2443e76Smarks } 2138d2443e76Smarks 2139d2443e76Smarks if (attrzp) 2140d2443e76Smarks mutex_exit(&attrzp->z_lock); 2141fa9e4066Sahrens 2142fa9e4066Sahrens if (mask & AT_ATIME) 2143fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 2144fa9e4066Sahrens 2145fa9e4066Sahrens if (mask & AT_MTIME) 2146fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 2147fa9e4066Sahrens 2148fa9e4066Sahrens if (mask_applied & AT_SIZE) 2149fa9e4066Sahrens zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx); 2150fa9e4066Sahrens else if (mask_applied != 0) 2151fa9e4066Sahrens zfs_time_stamper_locked(zp, STATE_CHANGED, tx); 2152fa9e4066Sahrens 2153fa9e4066Sahrens out: 2154d2443e76Smarks 2155fa9e4066Sahrens if (mask_applied != 0) 2156fa9e4066Sahrens seq = zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, 2157fa9e4066Sahrens mask_applied); 2158fa9e4066Sahrens 2159fa9e4066Sahrens mutex_exit(&zp->z_lock); 2160fa9e4066Sahrens 2161d2443e76Smarks if (attrzp) 2162d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2163d2443e76Smarks 2164fa9e4066Sahrens if (have_grow_lock) 2165fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 2166fa9e4066Sahrens 2167fa9e4066Sahrens dmu_tx_commit(tx); 2168fa9e4066Sahrens 2169fa9e4066Sahrens zil_commit(zilog, seq, 0); 2170fa9e4066Sahrens 2171fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2172fa9e4066Sahrens return (err); 2173fa9e4066Sahrens } 2174fa9e4066Sahrens 2175fa9e4066Sahrens /* 2176fa9e4066Sahrens * Search back through the directory tree, using the ".." entries. 2177fa9e4066Sahrens * Lock each directory in the chain to prevent concurrent renames. 2178fa9e4066Sahrens * Fail any attempt to move a directory into one of its own descendants. 2179fa9e4066Sahrens * XXX - z_parent_lock can overlap with map or grow locks 2180fa9e4066Sahrens */ 2181fa9e4066Sahrens typedef struct zfs_zlock { 2182fa9e4066Sahrens krwlock_t *zl_rwlock; /* lock we acquired */ 2183fa9e4066Sahrens znode_t *zl_znode; /* znode we held */ 2184fa9e4066Sahrens struct zfs_zlock *zl_next; /* next in list */ 2185fa9e4066Sahrens } zfs_zlock_t; 2186fa9e4066Sahrens 2187fa9e4066Sahrens static int 2188fa9e4066Sahrens zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 2189fa9e4066Sahrens { 2190fa9e4066Sahrens zfs_zlock_t *zl; 2191fa9e4066Sahrens znode_t *zp = tdzp; 2192fa9e4066Sahrens uint64_t rootid = zp->z_zfsvfs->z_root; 2193fa9e4066Sahrens uint64_t *oidp = &zp->z_id; 2194fa9e4066Sahrens krwlock_t *rwlp = &szp->z_parent_lock; 2195fa9e4066Sahrens krw_t rw = RW_WRITER; 2196fa9e4066Sahrens 2197fa9e4066Sahrens /* 2198fa9e4066Sahrens * First pass write-locks szp and compares to zp->z_id. 2199fa9e4066Sahrens * Later passes read-lock zp and compare to zp->z_parent. 2200fa9e4066Sahrens */ 2201fa9e4066Sahrens do { 2202fa9e4066Sahrens zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 2203fa9e4066Sahrens zl->zl_rwlock = rwlp; 2204fa9e4066Sahrens zl->zl_znode = NULL; 2205fa9e4066Sahrens zl->zl_next = *zlpp; 2206fa9e4066Sahrens *zlpp = zl; 2207fa9e4066Sahrens 2208fa9e4066Sahrens rw_enter(rwlp, rw); 2209fa9e4066Sahrens 2210fa9e4066Sahrens if (*oidp == szp->z_id) /* We're a descendant of szp */ 2211fa9e4066Sahrens return (EINVAL); 2212fa9e4066Sahrens 2213fa9e4066Sahrens if (*oidp == rootid) /* We've hit the top */ 2214fa9e4066Sahrens return (0); 2215fa9e4066Sahrens 2216fa9e4066Sahrens if (rw == RW_READER) { /* i.e. not the first pass */ 2217fa9e4066Sahrens int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp); 2218fa9e4066Sahrens if (error) 2219fa9e4066Sahrens return (error); 2220fa9e4066Sahrens zl->zl_znode = zp; 2221fa9e4066Sahrens } 2222fa9e4066Sahrens oidp = &zp->z_phys->zp_parent; 2223fa9e4066Sahrens rwlp = &zp->z_parent_lock; 2224fa9e4066Sahrens rw = RW_READER; 2225fa9e4066Sahrens 2226fa9e4066Sahrens } while (zp->z_id != sdzp->z_id); 2227fa9e4066Sahrens 2228fa9e4066Sahrens return (0); 2229fa9e4066Sahrens } 2230fa9e4066Sahrens 2231fa9e4066Sahrens /* 2232fa9e4066Sahrens * Drop locks and release vnodes that were held by zfs_rename_lock(). 2233fa9e4066Sahrens */ 2234fa9e4066Sahrens static void 2235fa9e4066Sahrens zfs_rename_unlock(zfs_zlock_t **zlpp) 2236fa9e4066Sahrens { 2237fa9e4066Sahrens zfs_zlock_t *zl; 2238fa9e4066Sahrens 2239fa9e4066Sahrens while ((zl = *zlpp) != NULL) { 2240fa9e4066Sahrens if (zl->zl_znode != NULL) 2241fa9e4066Sahrens VN_RELE(ZTOV(zl->zl_znode)); 2242fa9e4066Sahrens rw_exit(zl->zl_rwlock); 2243fa9e4066Sahrens *zlpp = zl->zl_next; 2244fa9e4066Sahrens kmem_free(zl, sizeof (*zl)); 2245fa9e4066Sahrens } 2246fa9e4066Sahrens } 2247fa9e4066Sahrens 2248fa9e4066Sahrens /* 2249fa9e4066Sahrens * Move an entry from the provided source directory to the target 2250fa9e4066Sahrens * directory. Change the entry name as indicated. 2251fa9e4066Sahrens * 2252fa9e4066Sahrens * IN: sdvp - Source directory containing the "old entry". 2253fa9e4066Sahrens * snm - Old entry name. 2254fa9e4066Sahrens * tdvp - Target directory to contain the "new entry". 2255fa9e4066Sahrens * tnm - New entry name. 2256fa9e4066Sahrens * cr - credentials of caller. 2257fa9e4066Sahrens * 2258fa9e4066Sahrens * RETURN: 0 if success 2259fa9e4066Sahrens * error code if failure 2260fa9e4066Sahrens * 2261fa9e4066Sahrens * Timestamps: 2262fa9e4066Sahrens * sdvp,tdvp - ctime|mtime updated 2263fa9e4066Sahrens */ 2264fa9e4066Sahrens static int 2265fa9e4066Sahrens zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr) 2266fa9e4066Sahrens { 2267fa9e4066Sahrens znode_t *tdzp, *szp, *tzp; 2268fa9e4066Sahrens znode_t *sdzp = VTOZ(sdvp); 2269fa9e4066Sahrens zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 2270fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2271fa9e4066Sahrens uint64_t seq = 0; 2272fa9e4066Sahrens vnode_t *realvp; 2273fa9e4066Sahrens zfs_dirlock_t *sdl, *tdl; 2274fa9e4066Sahrens dmu_tx_t *tx; 2275fa9e4066Sahrens zfs_zlock_t *zl; 2276fa9e4066Sahrens int cmp, serr, terr, error; 2277fa9e4066Sahrens 2278fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2279fa9e4066Sahrens 2280fa9e4066Sahrens /* 2281fa9e4066Sahrens * Make sure we have the real vp for the target directory. 2282fa9e4066Sahrens */ 2283fa9e4066Sahrens if (VOP_REALVP(tdvp, &realvp) == 0) 2284fa9e4066Sahrens tdvp = realvp; 2285fa9e4066Sahrens 2286fa9e4066Sahrens if (tdvp->v_vfsp != sdvp->v_vfsp) { 2287fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2288fa9e4066Sahrens return (EXDEV); 2289fa9e4066Sahrens } 2290fa9e4066Sahrens 2291fa9e4066Sahrens tdzp = VTOZ(tdvp); 2292fa9e4066Sahrens top: 2293fa9e4066Sahrens szp = NULL; 2294fa9e4066Sahrens tzp = NULL; 2295fa9e4066Sahrens zl = NULL; 2296fa9e4066Sahrens 2297fa9e4066Sahrens /* 2298fa9e4066Sahrens * This is to prevent the creation of links into attribute space 2299fa9e4066Sahrens * by renaming a linked file into/outof an attribute directory. 2300fa9e4066Sahrens * See the comment in zfs_link() for why this is considered bad. 2301fa9e4066Sahrens */ 2302fa9e4066Sahrens if ((tdzp->z_phys->zp_flags & ZFS_XATTR) != 2303fa9e4066Sahrens (sdzp->z_phys->zp_flags & ZFS_XATTR)) { 2304fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2305fa9e4066Sahrens return (EINVAL); 2306fa9e4066Sahrens } 2307fa9e4066Sahrens 2308fa9e4066Sahrens /* 2309fa9e4066Sahrens * Lock source and target directory entries. To prevent deadlock, 2310fa9e4066Sahrens * a lock ordering must be defined. We lock the directory with 2311fa9e4066Sahrens * the smallest object id first, or if it's a tie, the one with 2312fa9e4066Sahrens * the lexically first name. 2313fa9e4066Sahrens */ 2314fa9e4066Sahrens if (sdzp->z_id < tdzp->z_id) { 2315fa9e4066Sahrens cmp = -1; 2316fa9e4066Sahrens } else if (sdzp->z_id > tdzp->z_id) { 2317fa9e4066Sahrens cmp = 1; 2318fa9e4066Sahrens } else { 2319fa9e4066Sahrens cmp = strcmp(snm, tnm); 2320fa9e4066Sahrens if (cmp == 0) { 2321fa9e4066Sahrens /* 2322fa9e4066Sahrens * POSIX: "If the old argument and the new argument 2323fa9e4066Sahrens * both refer to links to the same existing file, 2324fa9e4066Sahrens * the rename() function shall return successfully 2325fa9e4066Sahrens * and perform no other action." 2326fa9e4066Sahrens */ 2327fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2328fa9e4066Sahrens return (0); 2329fa9e4066Sahrens } 2330fa9e4066Sahrens } 2331fa9e4066Sahrens if (cmp < 0) { 2332fa9e4066Sahrens serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, ZEXISTS); 2333fa9e4066Sahrens terr = zfs_dirent_lock(&tdl, tdzp, tnm, &tzp, 0); 2334fa9e4066Sahrens } else { 2335fa9e4066Sahrens terr = zfs_dirent_lock(&tdl, tdzp, tnm, &tzp, 0); 2336fa9e4066Sahrens serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, ZEXISTS); 2337fa9e4066Sahrens } 2338fa9e4066Sahrens 2339fa9e4066Sahrens if (serr) { 2340fa9e4066Sahrens /* 2341fa9e4066Sahrens * Source entry invalid or not there. 2342fa9e4066Sahrens */ 2343fa9e4066Sahrens if (!terr) { 2344fa9e4066Sahrens zfs_dirent_unlock(tdl); 2345fa9e4066Sahrens if (tzp) 2346fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 2347fa9e4066Sahrens } 2348fa9e4066Sahrens if (strcmp(snm, "..") == 0) 2349fa9e4066Sahrens serr = EINVAL; 2350fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2351fa9e4066Sahrens return (serr); 2352fa9e4066Sahrens } 2353fa9e4066Sahrens if (terr) { 2354fa9e4066Sahrens zfs_dirent_unlock(sdl); 2355fa9e4066Sahrens VN_RELE(ZTOV(szp)); 2356fa9e4066Sahrens if (strcmp(tnm, "..") == 0) 2357fa9e4066Sahrens terr = EINVAL; 2358fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2359fa9e4066Sahrens return (terr); 2360fa9e4066Sahrens } 2361fa9e4066Sahrens 2362fa9e4066Sahrens /* 2363fa9e4066Sahrens * Must have write access at the source to remove the old entry 2364fa9e4066Sahrens * and write access at the target to create the new entry. 2365fa9e4066Sahrens * Note that if target and source are the same, this can be 2366fa9e4066Sahrens * done in a single check. 2367fa9e4066Sahrens */ 2368fa9e4066Sahrens 2369fa9e4066Sahrens if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 2370fa9e4066Sahrens goto out; 2371fa9e4066Sahrens 2372fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 2373fa9e4066Sahrens /* 2374fa9e4066Sahrens * Check to make sure rename is valid. 2375fa9e4066Sahrens * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 2376fa9e4066Sahrens */ 2377fa9e4066Sahrens if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 2378fa9e4066Sahrens goto out; 2379fa9e4066Sahrens } 2380fa9e4066Sahrens 2381fa9e4066Sahrens /* 2382fa9e4066Sahrens * Does target exist? 2383fa9e4066Sahrens */ 2384fa9e4066Sahrens if (tzp) { 2385fa9e4066Sahrens /* 2386fa9e4066Sahrens * Source and target must be the same type. 2387fa9e4066Sahrens */ 2388fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 2389fa9e4066Sahrens if (ZTOV(tzp)->v_type != VDIR) { 2390fa9e4066Sahrens error = ENOTDIR; 2391fa9e4066Sahrens goto out; 2392fa9e4066Sahrens } 2393fa9e4066Sahrens } else { 2394fa9e4066Sahrens if (ZTOV(tzp)->v_type == VDIR) { 2395fa9e4066Sahrens error = EISDIR; 2396fa9e4066Sahrens goto out; 2397fa9e4066Sahrens } 2398fa9e4066Sahrens } 2399fa9e4066Sahrens /* 2400fa9e4066Sahrens * POSIX dictates that when the source and target 2401fa9e4066Sahrens * entries refer to the same file object, rename 2402fa9e4066Sahrens * must do nothing and exit without error. 2403fa9e4066Sahrens */ 2404fa9e4066Sahrens if (szp->z_id == tzp->z_id) { 2405fa9e4066Sahrens error = 0; 2406fa9e4066Sahrens goto out; 2407fa9e4066Sahrens } 2408fa9e4066Sahrens } 2409fa9e4066Sahrens 2410fa9e4066Sahrens vnevent_rename_src(ZTOV(szp)); 2411fa9e4066Sahrens if (tzp) 2412fa9e4066Sahrens vnevent_rename_dest(ZTOV(tzp)); 2413fa9e4066Sahrens 2414fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2415fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */ 2416fa9e4066Sahrens dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */ 2417fa9e4066Sahrens if (sdzp != tdzp) { 2418fa9e4066Sahrens dmu_tx_hold_zap(tx, sdzp->z_id, 1); 2419fa9e4066Sahrens dmu_tx_hold_zap(tx, tdzp->z_id, 1); 2420fa9e4066Sahrens dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */ 2421fa9e4066Sahrens } else { 2422fa9e4066Sahrens dmu_tx_hold_zap(tx, sdzp->z_id, 2); 2423fa9e4066Sahrens } 2424fa9e4066Sahrens if (tzp) { 2425fa9e4066Sahrens dmu_tx_hold_bonus(tx, tzp->z_id); /* nlink changes */ 2426fa9e4066Sahrens } 2427fa9e4066Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_dqueue, 1); 2428fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 2429fa9e4066Sahrens if (error) { 2430fa9e4066Sahrens dmu_tx_abort(tx); 2431fa9e4066Sahrens if (zl != NULL) 2432fa9e4066Sahrens zfs_rename_unlock(&zl); 2433fa9e4066Sahrens zfs_dirent_unlock(sdl); 2434fa9e4066Sahrens zfs_dirent_unlock(tdl); 2435fa9e4066Sahrens VN_RELE(ZTOV(szp)); 2436fa9e4066Sahrens if (tzp) 2437fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 2438fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 2439fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 2440fa9e4066Sahrens goto top; 2441fa9e4066Sahrens } 2442fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2443fa9e4066Sahrens return (error); 2444fa9e4066Sahrens } 2445fa9e4066Sahrens 2446fa9e4066Sahrens if (tzp) /* Attempt to remove the existing target */ 2447fa9e4066Sahrens error = zfs_link_destroy(tdl, tzp, tx, 0, NULL); 2448fa9e4066Sahrens 2449fa9e4066Sahrens if (error == 0) { 2450fa9e4066Sahrens error = zfs_link_create(tdl, szp, tx, ZRENAMING); 2451fa9e4066Sahrens if (error == 0) { 2452fa9e4066Sahrens error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 2453fa9e4066Sahrens ASSERT(error == 0); 2454fa9e4066Sahrens seq = zfs_log_rename(zilog, tx, TX_RENAME, 2455fa9e4066Sahrens sdzp, sdl->dl_name, tdzp, tdl->dl_name, szp); 2456fa9e4066Sahrens } 2457fa9e4066Sahrens } 2458fa9e4066Sahrens 2459fa9e4066Sahrens dmu_tx_commit(tx); 2460fa9e4066Sahrens out: 2461fa9e4066Sahrens if (zl != NULL) 2462fa9e4066Sahrens zfs_rename_unlock(&zl); 2463fa9e4066Sahrens 2464fa9e4066Sahrens zfs_dirent_unlock(sdl); 2465fa9e4066Sahrens zfs_dirent_unlock(tdl); 2466fa9e4066Sahrens 2467fa9e4066Sahrens VN_RELE(ZTOV(szp)); 2468fa9e4066Sahrens if (tzp) 2469fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 2470fa9e4066Sahrens 2471fa9e4066Sahrens zil_commit(zilog, seq, 0); 2472fa9e4066Sahrens 2473fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2474fa9e4066Sahrens return (error); 2475fa9e4066Sahrens } 2476fa9e4066Sahrens 2477fa9e4066Sahrens /* 2478fa9e4066Sahrens * Insert the indicated symbolic reference entry into the directory. 2479fa9e4066Sahrens * 2480fa9e4066Sahrens * IN: dvp - Directory to contain new symbolic link. 2481fa9e4066Sahrens * link - Name for new symlink entry. 2482fa9e4066Sahrens * vap - Attributes of new entry. 2483fa9e4066Sahrens * target - Target path of new symlink. 2484fa9e4066Sahrens * cr - credentials of caller. 2485fa9e4066Sahrens * 2486fa9e4066Sahrens * RETURN: 0 if success 2487fa9e4066Sahrens * error code if failure 2488fa9e4066Sahrens * 2489fa9e4066Sahrens * Timestamps: 2490fa9e4066Sahrens * dvp - ctime|mtime updated 2491fa9e4066Sahrens */ 2492fa9e4066Sahrens static int 2493fa9e4066Sahrens zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr) 2494fa9e4066Sahrens { 2495fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 2496fa9e4066Sahrens zfs_dirlock_t *dl; 2497fa9e4066Sahrens dmu_tx_t *tx; 2498fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2499fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2500fa9e4066Sahrens uint64_t seq = 0; 2501fa9e4066Sahrens uint64_t zoid; 2502fa9e4066Sahrens int len = strlen(link); 2503fa9e4066Sahrens int error; 2504fa9e4066Sahrens 2505fa9e4066Sahrens ASSERT(vap->va_type == VLNK); 2506fa9e4066Sahrens 2507fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2508fa9e4066Sahrens top: 2509fa9e4066Sahrens if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { 2510fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2511fa9e4066Sahrens return (error); 2512fa9e4066Sahrens } 2513fa9e4066Sahrens 2514fa9e4066Sahrens if (len > MAXPATHLEN) { 2515fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2516fa9e4066Sahrens return (ENAMETOOLONG); 2517fa9e4066Sahrens } 2518fa9e4066Sahrens 2519fa9e4066Sahrens /* 2520fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 2521fa9e4066Sahrens */ 2522fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &zp, ZNEW)) { 2523fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2524fa9e4066Sahrens return (error); 2525fa9e4066Sahrens } 2526fa9e4066Sahrens 2527fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2528fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 2529fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 2530fa9e4066Sahrens dmu_tx_hold_zap(tx, dzp->z_id, 1); 2531fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) 2532fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE); 2533fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 2534fa9e4066Sahrens if (error) { 2535fa9e4066Sahrens dmu_tx_abort(tx); 2536fa9e4066Sahrens zfs_dirent_unlock(dl); 2537fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 2538fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 2539fa9e4066Sahrens goto top; 2540fa9e4066Sahrens } 2541fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2542fa9e4066Sahrens return (error); 2543fa9e4066Sahrens } 2544fa9e4066Sahrens 2545fa9e4066Sahrens dmu_buf_will_dirty(dzp->z_dbuf, tx); 2546fa9e4066Sahrens 2547fa9e4066Sahrens /* 2548fa9e4066Sahrens * Create a new object for the symlink. 2549fa9e4066Sahrens * Put the link content into bonus buffer if it will fit; 2550fa9e4066Sahrens * otherwise, store it just like any other file data. 2551fa9e4066Sahrens */ 2552fa9e4066Sahrens zoid = 0; 2553fa9e4066Sahrens if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) { 2554fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, len); 2555fa9e4066Sahrens if (len != 0) 2556fa9e4066Sahrens bcopy(link, zp->z_phys + 1, len); 2557fa9e4066Sahrens } else { 2558fa9e4066Sahrens dmu_buf_t *dbp; 2559fa9e4066Sahrens zfs_mknode(dzp, vap, &zoid, tx, cr, 0, &zp, 0); 2560fa9e4066Sahrens 2561fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_WRITER); 2562fa9e4066Sahrens error = zfs_grow_blocksize(zp, len, tx); 2563fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 2564fa9e4066Sahrens if (error) 2565fa9e4066Sahrens goto out; 2566fa9e4066Sahrens 2567fa9e4066Sahrens dbp = dmu_buf_hold(zfsvfs->z_os, zoid, 0); 2568fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 2569fa9e4066Sahrens 2570fa9e4066Sahrens ASSERT3U(len, <=, dbp->db_size); 2571fa9e4066Sahrens bcopy(link, dbp->db_data, len); 2572fa9e4066Sahrens dmu_buf_rele(dbp); 2573fa9e4066Sahrens } 2574fa9e4066Sahrens zp->z_phys->zp_size = len; 2575fa9e4066Sahrens 2576fa9e4066Sahrens /* 2577fa9e4066Sahrens * Insert the new object into the directory. 2578fa9e4066Sahrens */ 2579fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 2580fa9e4066Sahrens out: 2581fa9e4066Sahrens if (error == 0) 2582fa9e4066Sahrens seq = zfs_log_symlink(zilog, tx, TX_SYMLINK, 2583fa9e4066Sahrens dzp, zp, name, link); 2584fa9e4066Sahrens 2585fa9e4066Sahrens dmu_tx_commit(tx); 2586fa9e4066Sahrens 2587fa9e4066Sahrens zfs_dirent_unlock(dl); 2588fa9e4066Sahrens 2589fa9e4066Sahrens VN_RELE(ZTOV(zp)); 2590fa9e4066Sahrens 2591fa9e4066Sahrens zil_commit(zilog, seq, 0); 2592fa9e4066Sahrens 2593fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2594fa9e4066Sahrens return (error); 2595fa9e4066Sahrens } 2596fa9e4066Sahrens 2597fa9e4066Sahrens /* 2598fa9e4066Sahrens * Return, in the buffer contained in the provided uio structure, 2599fa9e4066Sahrens * the symbolic path referred to by vp. 2600fa9e4066Sahrens * 2601fa9e4066Sahrens * IN: vp - vnode of symbolic link. 2602fa9e4066Sahrens * uoip - structure to contain the link path. 2603fa9e4066Sahrens * cr - credentials of caller. 2604fa9e4066Sahrens * 2605fa9e4066Sahrens * OUT: uio - structure to contain the link path. 2606fa9e4066Sahrens * 2607fa9e4066Sahrens * RETURN: 0 if success 2608fa9e4066Sahrens * error code if failure 2609fa9e4066Sahrens * 2610fa9e4066Sahrens * Timestamps: 2611fa9e4066Sahrens * vp - atime updated 2612fa9e4066Sahrens */ 2613fa9e4066Sahrens /* ARGSUSED */ 2614fa9e4066Sahrens static int 2615fa9e4066Sahrens zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr) 2616fa9e4066Sahrens { 2617fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2618fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2619fa9e4066Sahrens size_t bufsz; 2620fa9e4066Sahrens int error; 2621fa9e4066Sahrens 2622fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2623fa9e4066Sahrens 2624fa9e4066Sahrens bufsz = (size_t)zp->z_phys->zp_size; 2625fa9e4066Sahrens if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) { 2626fa9e4066Sahrens error = uiomove(zp->z_phys + 1, 2627fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 2628fa9e4066Sahrens } else { 2629fa9e4066Sahrens dmu_buf_t *dbp = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0); 2630fa9e4066Sahrens if ((error = dmu_buf_read_canfail(dbp)) != 0) { 2631fa9e4066Sahrens dmu_buf_rele(dbp); 2632fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2633fa9e4066Sahrens return (error); 2634fa9e4066Sahrens } 2635fa9e4066Sahrens error = uiomove(dbp->db_data, 2636fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 2637fa9e4066Sahrens dmu_buf_rele(dbp); 2638fa9e4066Sahrens } 2639fa9e4066Sahrens 2640fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2641fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2642fa9e4066Sahrens return (error); 2643fa9e4066Sahrens } 2644fa9e4066Sahrens 2645fa9e4066Sahrens /* 2646fa9e4066Sahrens * Insert a new entry into directory tdvp referencing svp. 2647fa9e4066Sahrens * 2648fa9e4066Sahrens * IN: tdvp - Directory to contain new entry. 2649fa9e4066Sahrens * svp - vnode of new entry. 2650fa9e4066Sahrens * name - name of new entry. 2651fa9e4066Sahrens * cr - credentials of caller. 2652fa9e4066Sahrens * 2653fa9e4066Sahrens * RETURN: 0 if success 2654fa9e4066Sahrens * error code if failure 2655fa9e4066Sahrens * 2656fa9e4066Sahrens * Timestamps: 2657fa9e4066Sahrens * tdvp - ctime|mtime updated 2658fa9e4066Sahrens * svp - ctime updated 2659fa9e4066Sahrens */ 2660fa9e4066Sahrens /* ARGSUSED */ 2661fa9e4066Sahrens static int 2662fa9e4066Sahrens zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr) 2663fa9e4066Sahrens { 2664fa9e4066Sahrens znode_t *dzp = VTOZ(tdvp); 2665fa9e4066Sahrens znode_t *tzp, *szp; 2666fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 2667fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2668fa9e4066Sahrens uint64_t seq = 0; 2669fa9e4066Sahrens zfs_dirlock_t *dl; 2670fa9e4066Sahrens dmu_tx_t *tx; 2671fa9e4066Sahrens vnode_t *realvp; 2672fa9e4066Sahrens int error; 2673fa9e4066Sahrens 2674fa9e4066Sahrens ASSERT(tdvp->v_type == VDIR); 2675fa9e4066Sahrens 2676fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2677fa9e4066Sahrens 2678fa9e4066Sahrens if (VOP_REALVP(svp, &realvp) == 0) 2679fa9e4066Sahrens svp = realvp; 2680fa9e4066Sahrens 2681fa9e4066Sahrens if (svp->v_vfsp != tdvp->v_vfsp) { 2682fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2683fa9e4066Sahrens return (EXDEV); 2684fa9e4066Sahrens } 2685fa9e4066Sahrens 2686fa9e4066Sahrens szp = VTOZ(svp); 2687fa9e4066Sahrens top: 2688fa9e4066Sahrens /* 2689fa9e4066Sahrens * We do not support links between attributes and non-attributes 2690fa9e4066Sahrens * because of the potential security risk of creating links 2691fa9e4066Sahrens * into "normal" file space in order to circumvent restrictions 2692fa9e4066Sahrens * imposed in attribute space. 2693fa9e4066Sahrens */ 2694fa9e4066Sahrens if ((szp->z_phys->zp_flags & ZFS_XATTR) != 2695fa9e4066Sahrens (dzp->z_phys->zp_flags & ZFS_XATTR)) { 2696fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2697fa9e4066Sahrens return (EINVAL); 2698fa9e4066Sahrens } 2699fa9e4066Sahrens 2700fa9e4066Sahrens /* 2701fa9e4066Sahrens * POSIX dictates that we return EPERM here. 2702fa9e4066Sahrens * Better choices include ENOTSUP or EISDIR. 2703fa9e4066Sahrens */ 2704fa9e4066Sahrens if (svp->v_type == VDIR) { 2705fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2706fa9e4066Sahrens return (EPERM); 2707fa9e4066Sahrens } 2708fa9e4066Sahrens 2709fa9e4066Sahrens if ((uid_t)szp->z_phys->zp_uid != crgetuid(cr) && 2710fa9e4066Sahrens secpolicy_basic_link(cr) != 0) { 2711fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2712fa9e4066Sahrens return (EPERM); 2713fa9e4066Sahrens } 2714fa9e4066Sahrens 2715fa9e4066Sahrens if (error = zfs_zaccess(dzp, ACE_ADD_FILE, cr)) { 2716fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2717fa9e4066Sahrens return (error); 2718fa9e4066Sahrens } 2719fa9e4066Sahrens 2720fa9e4066Sahrens /* 2721fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 2722fa9e4066Sahrens */ 2723fa9e4066Sahrens if (error = zfs_dirent_lock(&dl, dzp, name, &tzp, ZNEW)) { 2724fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2725fa9e4066Sahrens return (error); 2726fa9e4066Sahrens } 2727fa9e4066Sahrens 2728fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2729fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); 2730fa9e4066Sahrens dmu_tx_hold_zap(tx, dzp->z_id, 1); 2731fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 2732fa9e4066Sahrens if (error) { 2733fa9e4066Sahrens dmu_tx_abort(tx); 2734fa9e4066Sahrens zfs_dirent_unlock(dl); 2735fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 2736fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 2737fa9e4066Sahrens goto top; 2738fa9e4066Sahrens } 2739fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2740fa9e4066Sahrens return (error); 2741fa9e4066Sahrens } 2742fa9e4066Sahrens 2743fa9e4066Sahrens error = zfs_link_create(dl, szp, tx, 0); 2744fa9e4066Sahrens 2745fa9e4066Sahrens if (error == 0) 2746fa9e4066Sahrens seq = zfs_log_link(zilog, tx, TX_LINK, dzp, szp, name); 2747fa9e4066Sahrens 2748fa9e4066Sahrens dmu_tx_commit(tx); 2749fa9e4066Sahrens 2750fa9e4066Sahrens zfs_dirent_unlock(dl); 2751fa9e4066Sahrens 2752fa9e4066Sahrens zil_commit(zilog, seq, 0); 2753fa9e4066Sahrens 2754fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2755fa9e4066Sahrens return (error); 2756fa9e4066Sahrens } 2757fa9e4066Sahrens 2758fa9e4066Sahrens /* 2759fa9e4066Sahrens * zfs_null_putapage() is used when the file system has been force 2760fa9e4066Sahrens * unmounted. It just drops the pages. 2761fa9e4066Sahrens */ 2762fa9e4066Sahrens /* ARGSUSED */ 2763fa9e4066Sahrens static int 2764fa9e4066Sahrens zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 2765fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 2766fa9e4066Sahrens { 2767fa9e4066Sahrens pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 2768fa9e4066Sahrens return (0); 2769fa9e4066Sahrens } 2770fa9e4066Sahrens 2771fa9e4066Sahrens /* ARGSUSED */ 2772fa9e4066Sahrens static int 2773fa9e4066Sahrens zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 2774fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 2775fa9e4066Sahrens { 2776fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2777fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2778fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 2779fa9e4066Sahrens uint64_t seq = 0; 2780fa9e4066Sahrens dmu_tx_t *tx; 2781fa9e4066Sahrens u_offset_t off; 2782fa9e4066Sahrens ssize_t len; 2783fa9e4066Sahrens caddr_t va; 2784fa9e4066Sahrens int err; 2785fa9e4066Sahrens 2786fa9e4066Sahrens top: 2787fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_READER); 2788fa9e4066Sahrens 2789fa9e4066Sahrens off = pp->p_offset; 2790fa9e4066Sahrens len = MIN(PAGESIZE, zp->z_phys->zp_size - off); 2791fa9e4066Sahrens 2792fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2793fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, off, len); 2794fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 2795fa9e4066Sahrens err = dmu_tx_assign(tx, zfsvfs->z_assign); 2796fa9e4066Sahrens if (err != 0) { 2797fa9e4066Sahrens dmu_tx_abort(tx); 2798fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 2799fa9e4066Sahrens if (err == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 2800fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 2801fa9e4066Sahrens goto top; 2802fa9e4066Sahrens } 2803fa9e4066Sahrens goto out; 2804fa9e4066Sahrens } 2805fa9e4066Sahrens 2806fa9e4066Sahrens va = ppmapin(pp, PROT_READ | PROT_WRITE, (caddr_t)-1); 2807fa9e4066Sahrens 2808fa9e4066Sahrens dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 2809fa9e4066Sahrens 2810fa9e4066Sahrens ppmapout(va); 2811fa9e4066Sahrens 2812fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 2813fa9e4066Sahrens seq = zfs_log_write(zilog, tx, TX_WRITE, zp, off, len, 0, NULL); 2814fa9e4066Sahrens dmu_tx_commit(tx); 2815fa9e4066Sahrens 2816fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 2817fa9e4066Sahrens 2818fa9e4066Sahrens pvn_write_done(pp, B_WRITE | flags); 2819fa9e4066Sahrens if (offp) 2820fa9e4066Sahrens *offp = off; 2821fa9e4066Sahrens if (lenp) 2822fa9e4066Sahrens *lenp = len; 2823fa9e4066Sahrens 282422ac5be4Sperrin zil_commit(zilog, seq, (flags & B_ASYNC) ? 0 : FDSYNC); 2825fa9e4066Sahrens out: 2826fa9e4066Sahrens return (err); 2827fa9e4066Sahrens } 2828fa9e4066Sahrens 2829fa9e4066Sahrens /* 2830fa9e4066Sahrens * Copy the portion of the file indicated from pages into the file. 2831fa9e4066Sahrens * The pages are stored in a page list attached to the files vnode. 2832fa9e4066Sahrens * 2833fa9e4066Sahrens * IN: vp - vnode of file to push page data to. 2834fa9e4066Sahrens * off - position in file to put data. 2835fa9e4066Sahrens * len - amount of data to write. 2836fa9e4066Sahrens * flags - flags to control the operation. 2837fa9e4066Sahrens * cr - credentials of caller. 2838fa9e4066Sahrens * 2839fa9e4066Sahrens * RETURN: 0 if success 2840fa9e4066Sahrens * error code if failure 2841fa9e4066Sahrens * 2842fa9e4066Sahrens * Timestamps: 2843fa9e4066Sahrens * vp - ctime|mtime updated 2844fa9e4066Sahrens */ 2845fa9e4066Sahrens static int 2846fa9e4066Sahrens zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr) 2847fa9e4066Sahrens { 2848fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2849fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2850fa9e4066Sahrens page_t *pp; 2851fa9e4066Sahrens size_t io_len; 2852fa9e4066Sahrens u_offset_t io_off; 2853fa9e4066Sahrens int error = 0; 2854fa9e4066Sahrens 2855fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2856fa9e4066Sahrens 2857fa9e4066Sahrens ASSERT(zp->z_dbuf_held && zp->z_phys); 2858fa9e4066Sahrens 2859fa9e4066Sahrens if (len == 0) { 2860fa9e4066Sahrens /* 2861fa9e4066Sahrens * Search the entire vp list for pages >= off. 2862fa9e4066Sahrens */ 2863fa9e4066Sahrens error = pvn_vplist_dirty(vp, (u_offset_t)off, zfs_putapage, 2864fa9e4066Sahrens flags, cr); 2865fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2866fa9e4066Sahrens return (error); 2867fa9e4066Sahrens } 2868fa9e4066Sahrens 2869fa9e4066Sahrens if (off > zp->z_phys->zp_size) { 2870fa9e4066Sahrens /* past end of file */ 2871fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2872fa9e4066Sahrens return (0); 2873fa9e4066Sahrens } 2874fa9e4066Sahrens 2875fa9e4066Sahrens len = MIN(len, zp->z_phys->zp_size - off); 2876fa9e4066Sahrens 2877fa9e4066Sahrens io_off = off; 2878fa9e4066Sahrens while (io_off < off + len) { 2879fa9e4066Sahrens if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 2880fa9e4066Sahrens pp = page_lookup(vp, io_off, 2881fa9e4066Sahrens (flags & (B_INVAL | B_FREE)) ? 2882fa9e4066Sahrens SE_EXCL : SE_SHARED); 2883fa9e4066Sahrens } else { 2884fa9e4066Sahrens pp = page_lookup_nowait(vp, io_off, 2885fa9e4066Sahrens (flags & B_FREE) ? SE_EXCL : SE_SHARED); 2886fa9e4066Sahrens } 2887fa9e4066Sahrens 2888fa9e4066Sahrens if (pp != NULL && pvn_getdirty(pp, flags)) { 2889fa9e4066Sahrens int err; 2890fa9e4066Sahrens 2891fa9e4066Sahrens /* 2892fa9e4066Sahrens * Found a dirty page to push 2893fa9e4066Sahrens */ 2894fa9e4066Sahrens if (err = 2895fa9e4066Sahrens zfs_putapage(vp, pp, &io_off, &io_len, flags, cr)) 2896fa9e4066Sahrens error = err; 2897fa9e4066Sahrens } else { 2898fa9e4066Sahrens io_len = PAGESIZE; 2899fa9e4066Sahrens } 2900fa9e4066Sahrens io_off += io_len; 2901fa9e4066Sahrens } 2902fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2903fa9e4066Sahrens return (error); 2904fa9e4066Sahrens } 2905fa9e4066Sahrens 2906fa9e4066Sahrens void 2907fa9e4066Sahrens zfs_inactive(vnode_t *vp, cred_t *cr) 2908fa9e4066Sahrens { 2909fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2910fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2911fa9e4066Sahrens int error; 2912fa9e4066Sahrens 2913fa9e4066Sahrens rw_enter(&zfsvfs->z_um_lock, RW_READER); 2914fa9e4066Sahrens if (zfsvfs->z_unmounted2) { 2915fa9e4066Sahrens ASSERT(zp->z_dbuf_held == 0); 2916fa9e4066Sahrens 2917fa9e4066Sahrens if (vn_has_cached_data(vp)) { 2918fa9e4066Sahrens (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, 2919fa9e4066Sahrens B_INVAL, cr); 2920fa9e4066Sahrens } 2921fa9e4066Sahrens 2922fa9e4066Sahrens vp->v_count = 0; /* count arrives as 1 */ 2923fa9e4066Sahrens zfs_znode_free(zp); 2924fa9e4066Sahrens rw_exit(&zfsvfs->z_um_lock); 2925fa9e4066Sahrens VFS_RELE(zfsvfs->z_vfs); 2926fa9e4066Sahrens return; 2927fa9e4066Sahrens } 2928fa9e4066Sahrens 2929fa9e4066Sahrens /* 2930fa9e4066Sahrens * Attempt to push any data in the page cache. If this fails 2931fa9e4066Sahrens * we will get kicked out later in zfs_zinactive(). 2932fa9e4066Sahrens */ 29338afd4dd6Sperrin if (vn_has_cached_data(vp)) { 29348afd4dd6Sperrin (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, 29358afd4dd6Sperrin cr); 29368afd4dd6Sperrin } 2937fa9e4066Sahrens 2938fa9e4066Sahrens if (zp->z_atime_dirty && zp->z_reap == 0) { 2939fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 2940fa9e4066Sahrens 2941fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 2942fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 2943fa9e4066Sahrens if (error) { 2944fa9e4066Sahrens dmu_tx_abort(tx); 2945fa9e4066Sahrens } else { 2946fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 2947fa9e4066Sahrens mutex_enter(&zp->z_lock); 2948fa9e4066Sahrens zp->z_atime_dirty = 0; 2949fa9e4066Sahrens mutex_exit(&zp->z_lock); 2950fa9e4066Sahrens dmu_tx_commit(tx); 2951fa9e4066Sahrens } 2952fa9e4066Sahrens } 2953fa9e4066Sahrens 2954fa9e4066Sahrens zfs_zinactive(zp); 2955fa9e4066Sahrens rw_exit(&zfsvfs->z_um_lock); 2956fa9e4066Sahrens } 2957fa9e4066Sahrens 2958fa9e4066Sahrens /* 2959fa9e4066Sahrens * Bounds-check the seek operation. 2960fa9e4066Sahrens * 2961fa9e4066Sahrens * IN: vp - vnode seeking within 2962fa9e4066Sahrens * ooff - old file offset 2963fa9e4066Sahrens * noffp - pointer to new file offset 2964fa9e4066Sahrens * 2965fa9e4066Sahrens * RETURN: 0 if success 2966fa9e4066Sahrens * EINVAL if new offset invalid 2967fa9e4066Sahrens */ 2968fa9e4066Sahrens /* ARGSUSED */ 2969fa9e4066Sahrens static int 2970fa9e4066Sahrens zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp) 2971fa9e4066Sahrens { 2972fa9e4066Sahrens if (vp->v_type == VDIR) 2973fa9e4066Sahrens return (0); 2974fa9e4066Sahrens return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 2975fa9e4066Sahrens } 2976fa9e4066Sahrens 2977fa9e4066Sahrens /* 2978fa9e4066Sahrens * Pre-filter the generic locking function to trap attempts to place 2979fa9e4066Sahrens * a mandatory lock on a memory mapped file. 2980fa9e4066Sahrens */ 2981fa9e4066Sahrens static int 2982fa9e4066Sahrens zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 2983fa9e4066Sahrens flk_callback_t *flk_cbp, cred_t *cr) 2984fa9e4066Sahrens { 2985fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2986fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2987fa9e4066Sahrens uint_t cnt = 1; 2988fa9e4066Sahrens int error; 2989fa9e4066Sahrens 2990fa9e4066Sahrens ZFS_ENTER(zfsvfs); 2991fa9e4066Sahrens 2992fa9e4066Sahrens /* 2993fa9e4066Sahrens * If file is being mapped, disallow frlock. We set the mapcnt to 2994fa9e4066Sahrens * -1 here to signal that we are in the process of setting a lock. 2995fa9e4066Sahrens * This prevents a race with zfs_map(). 2996fa9e4066Sahrens * XXX - well, sort of; since zfs_map() does not change z_mapcnt, 2997fa9e4066Sahrens * we could be in the middle of zfs_map() and still call fs_frlock(). 2998fa9e4066Sahrens * Also, we are doing no checking in zfs_addmap() (where z_mapcnt 2999fa9e4066Sahrens * *is* manipulated). 3000fa9e4066Sahrens */ 3001fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode) && 3002fa9e4066Sahrens (int)(cnt = atomic_cas_32(&zp->z_mapcnt, 0, -1)) > 0) { 3003fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3004fa9e4066Sahrens return (EAGAIN); 3005fa9e4066Sahrens } 3006fa9e4066Sahrens error = fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr); 3007fa9e4066Sahrens ASSERT((cnt != 0) || ((int)atomic_cas_32(&zp->z_mapcnt, -1, 0) == -1)); 3008fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3009fa9e4066Sahrens return (error); 3010fa9e4066Sahrens } 3011fa9e4066Sahrens 3012fa9e4066Sahrens /* 3013fa9e4066Sahrens * If we can't find a page in the cache, we will create a new page 3014fa9e4066Sahrens * and fill it with file data. For efficiency, we may try to fill 3015fa9e4066Sahrens * multiple pages as once (klustering). 3016fa9e4066Sahrens */ 3017fa9e4066Sahrens static int 3018fa9e4066Sahrens zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 3019fa9e4066Sahrens caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 3020fa9e4066Sahrens { 3021fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3022fa9e4066Sahrens page_t *pp, *cur_pp; 3023fa9e4066Sahrens objset_t *os = zp->z_zfsvfs->z_os; 3024fa9e4066Sahrens caddr_t va; 3025fa9e4066Sahrens u_offset_t io_off, total; 3026fa9e4066Sahrens uint64_t oid = zp->z_id; 3027fa9e4066Sahrens size_t io_len; 3028fa9e4066Sahrens int err; 3029fa9e4066Sahrens 3030fa9e4066Sahrens /* 3031fa9e4066Sahrens * If we are only asking for a single page don't bother klustering. 3032fa9e4066Sahrens */ 3033fa9e4066Sahrens if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE || 3034fa9e4066Sahrens off > zp->z_phys->zp_size) { 3035fa9e4066Sahrens io_off = off; 3036fa9e4066Sahrens io_len = PAGESIZE; 3037fa9e4066Sahrens pp = page_create_va(vp, io_off, io_len, PG_WAIT, seg, addr); 3038fa9e4066Sahrens } else { 3039fa9e4066Sahrens /* 3040fa9e4066Sahrens * Try to fill a kluster of pages (a blocks worth). 3041fa9e4066Sahrens */ 3042fa9e4066Sahrens size_t klen; 3043fa9e4066Sahrens u_offset_t koff; 3044fa9e4066Sahrens 3045fa9e4066Sahrens if (!ISP2(zp->z_blksz)) { 3046fa9e4066Sahrens /* Only one block in the file. */ 3047fa9e4066Sahrens klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 3048fa9e4066Sahrens koff = 0; 3049fa9e4066Sahrens } else { 3050fa9e4066Sahrens klen = plsz; 3051fa9e4066Sahrens koff = P2ALIGN(off, (u_offset_t)klen); 3052fa9e4066Sahrens } 3053fa9e4066Sahrens if (klen > zp->z_phys->zp_size) 3054fa9e4066Sahrens klen = P2ROUNDUP(zp->z_phys->zp_size, 3055fa9e4066Sahrens (uint64_t)PAGESIZE); 3056fa9e4066Sahrens pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 3057fa9e4066Sahrens &io_len, koff, klen, 0); 3058fa9e4066Sahrens } 3059fa9e4066Sahrens if (pp == NULL) { 3060fa9e4066Sahrens /* 3061fa9e4066Sahrens * Some other thread entered the page before us. 3062fa9e4066Sahrens * Return to zfs_getpage to retry the lookup. 3063fa9e4066Sahrens */ 3064fa9e4066Sahrens *pl = NULL; 3065fa9e4066Sahrens return (0); 3066fa9e4066Sahrens } 3067fa9e4066Sahrens 3068fa9e4066Sahrens /* 3069fa9e4066Sahrens * Fill the pages in the kluster. 3070fa9e4066Sahrens */ 3071fa9e4066Sahrens cur_pp = pp; 3072fa9e4066Sahrens for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 3073fa9e4066Sahrens ASSERT(io_off == cur_pp->p_offset); 3074fa9e4066Sahrens va = ppmapin(cur_pp, PROT_READ | PROT_WRITE, (caddr_t)-1); 3075fa9e4066Sahrens err = dmu_read_canfail(os, oid, io_off, PAGESIZE, va); 3076fa9e4066Sahrens ppmapout(va); 3077fa9e4066Sahrens if (err) { 3078fa9e4066Sahrens /* On error, toss the entire kluster */ 3079fa9e4066Sahrens pvn_read_done(pp, B_ERROR); 3080fa9e4066Sahrens return (err); 3081fa9e4066Sahrens } 3082fa9e4066Sahrens cur_pp = cur_pp->p_next; 3083fa9e4066Sahrens } 3084fa9e4066Sahrens out: 3085fa9e4066Sahrens /* 3086fa9e4066Sahrens * Fill in the page list array from the kluster. If 3087fa9e4066Sahrens * there are too many pages in the kluster, return 3088fa9e4066Sahrens * as many pages as possible starting from the desired 3089fa9e4066Sahrens * offset `off'. 3090fa9e4066Sahrens * NOTE: the page list will always be null terminated. 3091fa9e4066Sahrens */ 3092fa9e4066Sahrens pvn_plist_init(pp, pl, plsz, off, io_len, rw); 3093fa9e4066Sahrens 3094fa9e4066Sahrens return (0); 3095fa9e4066Sahrens } 3096fa9e4066Sahrens 3097fa9e4066Sahrens /* 3098fa9e4066Sahrens * Return pointers to the pages for the file region [off, off + len] 3099fa9e4066Sahrens * in the pl array. If plsz is greater than len, this function may 3100fa9e4066Sahrens * also return page pointers from before or after the specified 3101fa9e4066Sahrens * region (i.e. some region [off', off' + plsz]). These additional 3102fa9e4066Sahrens * pages are only returned if they are already in the cache, or were 3103fa9e4066Sahrens * created as part of a klustered read. 3104fa9e4066Sahrens * 3105fa9e4066Sahrens * IN: vp - vnode of file to get data from. 3106fa9e4066Sahrens * off - position in file to get data from. 3107fa9e4066Sahrens * len - amount of data to retrieve. 3108fa9e4066Sahrens * plsz - length of provided page list. 3109fa9e4066Sahrens * seg - segment to obtain pages for. 3110fa9e4066Sahrens * addr - virtual address of fault. 3111fa9e4066Sahrens * rw - mode of created pages. 3112fa9e4066Sahrens * cr - credentials of caller. 3113fa9e4066Sahrens * 3114fa9e4066Sahrens * OUT: protp - protection mode of created pages. 3115fa9e4066Sahrens * pl - list of pages created. 3116fa9e4066Sahrens * 3117fa9e4066Sahrens * RETURN: 0 if success 3118fa9e4066Sahrens * error code if failure 3119fa9e4066Sahrens * 3120fa9e4066Sahrens * Timestamps: 3121fa9e4066Sahrens * vp - atime updated 3122fa9e4066Sahrens */ 3123fa9e4066Sahrens /* ARGSUSED */ 3124fa9e4066Sahrens static int 3125fa9e4066Sahrens zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 3126fa9e4066Sahrens page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 3127fa9e4066Sahrens enum seg_rw rw, cred_t *cr) 3128fa9e4066Sahrens { 3129fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3130fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3131fa9e4066Sahrens page_t *pp, **pl0 = pl; 3132fa9e4066Sahrens int cnt = 0, need_unlock = 0, err = 0; 3133fa9e4066Sahrens 3134fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3135fa9e4066Sahrens 3136fa9e4066Sahrens if (protp) 3137fa9e4066Sahrens *protp = PROT_ALL; 3138fa9e4066Sahrens 3139fa9e4066Sahrens ASSERT(zp->z_dbuf_held && zp->z_phys); 3140fa9e4066Sahrens 3141fa9e4066Sahrens /* no faultahead (for now) */ 3142fa9e4066Sahrens if (pl == NULL) { 3143fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3144fa9e4066Sahrens return (0); 3145fa9e4066Sahrens } 3146fa9e4066Sahrens 3147fa9e4066Sahrens /* can't fault past EOF */ 3148fa9e4066Sahrens if (off >= zp->z_phys->zp_size) { 3149fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3150fa9e4066Sahrens return (EFAULT); 3151fa9e4066Sahrens } 3152fa9e4066Sahrens 3153fa9e4066Sahrens /* 3154fa9e4066Sahrens * Make sure nobody restructures the file (changes block size) 3155fa9e4066Sahrens * in the middle of the getpage. 3156fa9e4066Sahrens */ 3157fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_READER); 3158fa9e4066Sahrens 3159fa9e4066Sahrens /* 3160fa9e4066Sahrens * If we already own the lock, then we must be page faulting 3161fa9e4066Sahrens * in the middle of a write to this file (i.e., we are writing 3162fa9e4066Sahrens * to this file using data from a mapped region of the file). 3163fa9e4066Sahrens */ 3164fa9e4066Sahrens if (!rw_owner(&zp->z_map_lock)) { 3165fa9e4066Sahrens rw_enter(&zp->z_map_lock, RW_WRITER); 3166fa9e4066Sahrens need_unlock = TRUE; 3167fa9e4066Sahrens } 3168fa9e4066Sahrens 3169fa9e4066Sahrens /* 3170fa9e4066Sahrens * Loop through the requested range [off, off + len] looking 3171fa9e4066Sahrens * for pages. If we don't find a page, we will need to create 3172fa9e4066Sahrens * a new page and fill it with data from the file. 3173fa9e4066Sahrens */ 3174fa9e4066Sahrens while (len > 0) { 3175fa9e4066Sahrens if (plsz < PAGESIZE) 3176fa9e4066Sahrens break; 3177fa9e4066Sahrens if (pp = page_lookup(vp, off, SE_SHARED)) { 3178fa9e4066Sahrens *pl++ = pp; 3179fa9e4066Sahrens off += PAGESIZE; 3180fa9e4066Sahrens addr += PAGESIZE; 3181fa9e4066Sahrens len -= PAGESIZE; 3182fa9e4066Sahrens plsz -= PAGESIZE; 3183fa9e4066Sahrens } else { 3184fa9e4066Sahrens err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw); 3185fa9e4066Sahrens /* 3186fa9e4066Sahrens * klustering may have changed our region 3187fa9e4066Sahrens * to be block aligned. 3188fa9e4066Sahrens */ 3189fa9e4066Sahrens if (((pp = *pl) != 0) && (off != pp->p_offset)) { 3190fa9e4066Sahrens int delta = off - pp->p_offset; 3191fa9e4066Sahrens len += delta; 3192fa9e4066Sahrens off -= delta; 3193fa9e4066Sahrens addr -= delta; 3194fa9e4066Sahrens } 3195fa9e4066Sahrens while (*pl) { 3196fa9e4066Sahrens pl++; 3197fa9e4066Sahrens cnt++; 3198fa9e4066Sahrens off += PAGESIZE; 3199fa9e4066Sahrens addr += PAGESIZE; 3200fa9e4066Sahrens plsz -= PAGESIZE; 3201fa9e4066Sahrens if (len > PAGESIZE) 3202fa9e4066Sahrens len -= PAGESIZE; 3203fa9e4066Sahrens else 3204fa9e4066Sahrens len = 0; 3205fa9e4066Sahrens } 3206fa9e4066Sahrens } 3207fa9e4066Sahrens if (err) 3208fa9e4066Sahrens goto out; 3209fa9e4066Sahrens } 3210fa9e4066Sahrens 3211fa9e4066Sahrens /* 3212fa9e4066Sahrens * Fill out the page array with any pages already in the cache. 3213fa9e4066Sahrens */ 3214fa9e4066Sahrens while (plsz > 0) { 3215fa9e4066Sahrens pp = page_lookup_nowait(vp, off, SE_SHARED); 3216fa9e4066Sahrens if (pp == NULL) 3217fa9e4066Sahrens break; 3218fa9e4066Sahrens *pl++ = pp; 3219fa9e4066Sahrens off += PAGESIZE; 3220fa9e4066Sahrens plsz -= PAGESIZE; 3221fa9e4066Sahrens } 3222fa9e4066Sahrens 3223fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 3224fa9e4066Sahrens out: 3225fa9e4066Sahrens if (err) { 3226fa9e4066Sahrens /* 3227fa9e4066Sahrens * Release any pages we have locked. 3228fa9e4066Sahrens */ 3229fa9e4066Sahrens while (pl > pl0) 3230fa9e4066Sahrens page_unlock(*--pl); 3231fa9e4066Sahrens } 3232fa9e4066Sahrens *pl = NULL; 3233fa9e4066Sahrens 3234fa9e4066Sahrens if (need_unlock) 3235fa9e4066Sahrens rw_exit(&zp->z_map_lock); 3236fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 3237fa9e4066Sahrens 3238fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3239fa9e4066Sahrens return (err); 3240fa9e4066Sahrens } 3241fa9e4066Sahrens 3242fa9e4066Sahrens static int 3243fa9e4066Sahrens zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 3244fa9e4066Sahrens size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr) 3245fa9e4066Sahrens { 3246fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3247fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3248fa9e4066Sahrens segvn_crargs_t vn_a; 3249fa9e4066Sahrens int error; 3250fa9e4066Sahrens 3251fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3252fa9e4066Sahrens 3253fa9e4066Sahrens if (vp->v_flag & VNOMAP) { 3254fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3255fa9e4066Sahrens return (ENOSYS); 3256fa9e4066Sahrens } 3257fa9e4066Sahrens 3258fa9e4066Sahrens if (off < 0 || len > MAXOFFSET_T - off) { 3259fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3260fa9e4066Sahrens return (ENXIO); 3261fa9e4066Sahrens } 3262fa9e4066Sahrens 3263fa9e4066Sahrens if (vp->v_type != VREG) { 3264fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3265fa9e4066Sahrens return (ENODEV); 3266fa9e4066Sahrens } 3267fa9e4066Sahrens 3268fa9e4066Sahrens /* 3269fa9e4066Sahrens * If file is locked, disallow mapping. 3270fa9e4066Sahrens * XXX - since we don't modify z_mapcnt here, there is nothing 3271fa9e4066Sahrens * to stop a file lock being placed immediately after we complete 3272fa9e4066Sahrens * this check. 3273fa9e4066Sahrens */ 3274fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode)) { 3275fa9e4066Sahrens if (vn_has_flocks(vp) || zp->z_mapcnt == -1) { 3276fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3277fa9e4066Sahrens return (EAGAIN); 3278fa9e4066Sahrens } 3279fa9e4066Sahrens } 3280fa9e4066Sahrens 3281fa9e4066Sahrens as_rangelock(as); 3282fa9e4066Sahrens if ((flags & MAP_FIXED) == 0) { 3283fa9e4066Sahrens map_addr(addrp, len, off, 1, flags); 3284fa9e4066Sahrens if (*addrp == NULL) { 3285fa9e4066Sahrens as_rangeunlock(as); 3286fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3287fa9e4066Sahrens return (ENOMEM); 3288fa9e4066Sahrens } 3289fa9e4066Sahrens } else { 3290fa9e4066Sahrens /* 3291fa9e4066Sahrens * User specified address - blow away any previous mappings 3292fa9e4066Sahrens */ 3293fa9e4066Sahrens (void) as_unmap(as, *addrp, len); 3294fa9e4066Sahrens } 3295fa9e4066Sahrens 3296fa9e4066Sahrens vn_a.vp = vp; 3297fa9e4066Sahrens vn_a.offset = (u_offset_t)off; 3298fa9e4066Sahrens vn_a.type = flags & MAP_TYPE; 3299fa9e4066Sahrens vn_a.prot = prot; 3300fa9e4066Sahrens vn_a.maxprot = maxprot; 3301fa9e4066Sahrens vn_a.cred = cr; 3302fa9e4066Sahrens vn_a.amp = NULL; 3303fa9e4066Sahrens vn_a.flags = flags & ~MAP_TYPE; 33044944b02eSkchow vn_a.szc = 0; 33054944b02eSkchow vn_a.lgrp_mem_policy_flags = 0; 3306fa9e4066Sahrens 3307fa9e4066Sahrens error = as_map(as, *addrp, len, segvn_create, &vn_a); 3308fa9e4066Sahrens 3309fa9e4066Sahrens as_rangeunlock(as); 3310fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3311fa9e4066Sahrens return (error); 3312fa9e4066Sahrens } 3313fa9e4066Sahrens 3314fa9e4066Sahrens /* ARGSUSED */ 3315fa9e4066Sahrens static int 3316fa9e4066Sahrens zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 3317fa9e4066Sahrens size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr) 3318fa9e4066Sahrens { 3319fa9e4066Sahrens /* 3320fa9e4066Sahrens * XXX - shouldn't we be checking for file locks here? 3321fa9e4066Sahrens */ 3322fa9e4066Sahrens ASSERT3U(VTOZ(vp)->z_mapcnt, >=, 0); 3323fa9e4066Sahrens atomic_add_32(&VTOZ(vp)->z_mapcnt, btopr(len)); 3324fa9e4066Sahrens return (0); 3325fa9e4066Sahrens } 3326fa9e4066Sahrens 3327fa9e4066Sahrens /* ARGSUSED */ 3328fa9e4066Sahrens static int 3329fa9e4066Sahrens zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 3330fa9e4066Sahrens size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr) 3331fa9e4066Sahrens { 3332fa9e4066Sahrens atomic_add_32(&VTOZ(vp)->z_mapcnt, -btopr(len)); 3333fa9e4066Sahrens ASSERT3U(VTOZ(vp)->z_mapcnt, >=, 0); 3334fa9e4066Sahrens return (0); 3335fa9e4066Sahrens } 3336fa9e4066Sahrens 3337fa9e4066Sahrens /* 3338fa9e4066Sahrens * Free or allocate space in a file. Currently, this function only 3339fa9e4066Sahrens * supports the `F_FREESP' command. However, this command is somewhat 3340fa9e4066Sahrens * misnamed, as its functionality includes the ability to allocate as 3341fa9e4066Sahrens * well as free space. 3342fa9e4066Sahrens * 3343fa9e4066Sahrens * IN: vp - vnode of file to free data in. 3344fa9e4066Sahrens * cmd - action to take (only F_FREESP supported). 3345fa9e4066Sahrens * bfp - section of file to free/alloc. 3346fa9e4066Sahrens * flag - current file open mode flags. 3347fa9e4066Sahrens * offset - current file offset. 3348fa9e4066Sahrens * cr - credentials of caller [UNUSED]. 3349fa9e4066Sahrens * 3350fa9e4066Sahrens * RETURN: 0 if success 3351fa9e4066Sahrens * error code if failure 3352fa9e4066Sahrens * 3353fa9e4066Sahrens * Timestamps: 3354fa9e4066Sahrens * vp - ctime|mtime updated 3355fa9e4066Sahrens * 3356fa9e4066Sahrens * NOTE: This function is limited in that it will only permit space to 3357fa9e4066Sahrens * be freed at the end of a file. In essence, this function simply 3358fa9e4066Sahrens * allows one to set the file size. 3359fa9e4066Sahrens */ 3360fa9e4066Sahrens /* ARGSUSED */ 3361fa9e4066Sahrens static int 3362fa9e4066Sahrens zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 3363fa9e4066Sahrens offset_t offset, cred_t *cr, caller_context_t *ct) 3364fa9e4066Sahrens { 3365fa9e4066Sahrens dmu_tx_t *tx; 3366fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3367fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3368fa9e4066Sahrens zilog_t *zilog = zfsvfs->z_log; 3369fa9e4066Sahrens uint64_t seq = 0; 3370fa9e4066Sahrens uint64_t off, len; 3371fa9e4066Sahrens int error; 3372fa9e4066Sahrens 3373fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3374fa9e4066Sahrens 3375fa9e4066Sahrens top: 3376fa9e4066Sahrens if (cmd != F_FREESP) { 3377fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3378fa9e4066Sahrens return (EINVAL); 3379fa9e4066Sahrens } 3380fa9e4066Sahrens 3381fa9e4066Sahrens if (error = convoff(vp, bfp, 0, offset)) { 3382fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3383fa9e4066Sahrens return (error); 3384fa9e4066Sahrens } 3385fa9e4066Sahrens 3386fa9e4066Sahrens if (bfp->l_len < 0) { 3387fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3388fa9e4066Sahrens return (EINVAL); 3389fa9e4066Sahrens } 3390fa9e4066Sahrens 3391fa9e4066Sahrens off = bfp->l_start; 3392fa9e4066Sahrens len = bfp->l_len; 3393fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3394fa9e4066Sahrens /* 3395fa9e4066Sahrens * Grab the grow_lock to serialize this change with 3396fa9e4066Sahrens * respect to other file size changes. 3397fa9e4066Sahrens */ 3398fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 3399fa9e4066Sahrens rw_enter(&zp->z_grow_lock, RW_WRITER); 3400fa9e4066Sahrens if (off + len > zp->z_blksz && zp->z_blksz < zfsvfs->z_max_blksz && 3401fa9e4066Sahrens off >= zp->z_phys->zp_size) { 3402fa9e4066Sahrens /* 3403fa9e4066Sahrens * We are increasing the length of the file, 3404fa9e4066Sahrens * and this may mean a block size increase. 3405fa9e4066Sahrens */ 3406fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, 0, 3407fa9e4066Sahrens MIN(off + len, zfsvfs->z_max_blksz)); 3408fa9e4066Sahrens } else if (off < zp->z_phys->zp_size) { 3409fa9e4066Sahrens /* 3410fa9e4066Sahrens * If len == 0, we are truncating the file. 3411fa9e4066Sahrens */ 3412fa9e4066Sahrens dmu_tx_hold_free(tx, zp->z_id, off, len ? len : DMU_OBJECT_END); 3413fa9e4066Sahrens } 3414fa9e4066Sahrens 3415fa9e4066Sahrens error = dmu_tx_assign(tx, zfsvfs->z_assign); 3416fa9e4066Sahrens if (error) { 3417fa9e4066Sahrens dmu_tx_abort(tx); 3418fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 3419fa9e4066Sahrens if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) { 3420fa9e4066Sahrens txg_wait_open(dmu_objset_pool(zfsvfs->z_os), 0); 3421fa9e4066Sahrens goto top; 3422fa9e4066Sahrens } 3423fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3424fa9e4066Sahrens return (error); 3425fa9e4066Sahrens } 3426fa9e4066Sahrens 3427fa9e4066Sahrens error = zfs_freesp(zp, off, len, flag, tx, cr); 3428fa9e4066Sahrens 3429fa9e4066Sahrens if (error == 0) { 3430fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 3431fa9e4066Sahrens seq = zfs_log_truncate(zilog, tx, TX_TRUNCATE, zp, off, len); 3432fa9e4066Sahrens } 3433fa9e4066Sahrens 3434fa9e4066Sahrens rw_exit(&zp->z_grow_lock); 3435fa9e4066Sahrens 3436fa9e4066Sahrens dmu_tx_commit(tx); 3437fa9e4066Sahrens 3438fa9e4066Sahrens zil_commit(zilog, seq, 0); 3439fa9e4066Sahrens 3440fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3441fa9e4066Sahrens return (error); 3442fa9e4066Sahrens } 3443fa9e4066Sahrens 3444fa9e4066Sahrens static int 3445fa9e4066Sahrens zfs_fid(vnode_t *vp, fid_t *fidp) 3446fa9e4066Sahrens { 3447fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3448fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3449fa9e4066Sahrens uint32_t gen = (uint32_t)zp->z_phys->zp_gen; 3450fa9e4066Sahrens uint64_t object = zp->z_id; 3451fa9e4066Sahrens zfid_short_t *zfid; 3452fa9e4066Sahrens int size, i; 3453fa9e4066Sahrens 3454fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3455fa9e4066Sahrens 3456fa9e4066Sahrens size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 3457fa9e4066Sahrens if (fidp->fid_len < size) { 3458fa9e4066Sahrens fidp->fid_len = size; 3459fa9e4066Sahrens return (ENOSPC); 3460fa9e4066Sahrens } 3461fa9e4066Sahrens 3462fa9e4066Sahrens zfid = (zfid_short_t *)fidp; 3463fa9e4066Sahrens 3464fa9e4066Sahrens zfid->zf_len = size; 3465fa9e4066Sahrens 3466fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_object); i++) 3467fa9e4066Sahrens zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 3468fa9e4066Sahrens 3469fa9e4066Sahrens /* Must have a non-zero generation number to distinguish from .zfs */ 3470fa9e4066Sahrens if (gen == 0) 3471fa9e4066Sahrens gen = 1; 3472fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_gen); i++) 3473fa9e4066Sahrens zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 3474fa9e4066Sahrens 3475fa9e4066Sahrens if (size == LONG_FID_LEN) { 3476fa9e4066Sahrens uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 3477fa9e4066Sahrens zfid_long_t *zlfid; 3478fa9e4066Sahrens 3479fa9e4066Sahrens zlfid = (zfid_long_t *)fidp; 3480fa9e4066Sahrens 3481fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setid); i++) 3482fa9e4066Sahrens zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 3483fa9e4066Sahrens 3484fa9e4066Sahrens /* XXX - this should be the generation number for the objset */ 3485fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 3486fa9e4066Sahrens zlfid->zf_setgen[i] = 0; 3487fa9e4066Sahrens } 3488fa9e4066Sahrens 3489fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3490fa9e4066Sahrens return (0); 3491fa9e4066Sahrens } 3492fa9e4066Sahrens 3493fa9e4066Sahrens static int 3494fa9e4066Sahrens zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr) 3495fa9e4066Sahrens { 3496fa9e4066Sahrens znode_t *zp, *xzp; 3497fa9e4066Sahrens zfsvfs_t *zfsvfs; 3498fa9e4066Sahrens zfs_dirlock_t *dl; 3499fa9e4066Sahrens int error; 3500fa9e4066Sahrens 3501fa9e4066Sahrens switch (cmd) { 3502fa9e4066Sahrens case _PC_LINK_MAX: 3503fa9e4066Sahrens *valp = ULONG_MAX; 3504fa9e4066Sahrens return (0); 3505fa9e4066Sahrens 3506fa9e4066Sahrens case _PC_FILESIZEBITS: 3507fa9e4066Sahrens *valp = 64; 3508fa9e4066Sahrens return (0); 3509fa9e4066Sahrens 3510fa9e4066Sahrens case _PC_XATTR_EXISTS: 3511fa9e4066Sahrens zp = VTOZ(vp); 3512fa9e4066Sahrens zfsvfs = zp->z_zfsvfs; 3513fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3514fa9e4066Sahrens *valp = 0; 3515fa9e4066Sahrens error = zfs_dirent_lock(&dl, zp, "", &xzp, 3516fa9e4066Sahrens ZXATTR | ZEXISTS | ZSHARED); 3517fa9e4066Sahrens if (error == 0) { 3518fa9e4066Sahrens zfs_dirent_unlock(dl); 3519fa9e4066Sahrens if (!zfs_dirempty(xzp)) 3520fa9e4066Sahrens *valp = 1; 3521fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 3522fa9e4066Sahrens } else if (error == ENOENT) { 3523fa9e4066Sahrens /* 3524fa9e4066Sahrens * If there aren't extended attributes, it's the 3525fa9e4066Sahrens * same as having zero of them. 3526fa9e4066Sahrens */ 3527fa9e4066Sahrens error = 0; 3528fa9e4066Sahrens } 3529fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3530fa9e4066Sahrens return (error); 3531fa9e4066Sahrens 3532fa9e4066Sahrens case _PC_ACL_ENABLED: 3533fa9e4066Sahrens *valp = _ACL_ACE_ENABLED; 3534fa9e4066Sahrens return (0); 3535fa9e4066Sahrens 3536fa9e4066Sahrens case _PC_MIN_HOLE_SIZE: 3537fa9e4066Sahrens *valp = (ulong_t)SPA_MINBLOCKSIZE; 3538fa9e4066Sahrens return (0); 3539fa9e4066Sahrens 3540fa9e4066Sahrens default: 3541fa9e4066Sahrens return (fs_pathconf(vp, cmd, valp, cr)); 3542fa9e4066Sahrens } 3543fa9e4066Sahrens } 3544fa9e4066Sahrens 3545fa9e4066Sahrens /*ARGSUSED*/ 3546fa9e4066Sahrens static int 3547fa9e4066Sahrens zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr) 3548fa9e4066Sahrens { 3549fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3550fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3551fa9e4066Sahrens int error; 3552fa9e4066Sahrens 3553fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3554fa9e4066Sahrens error = zfs_getacl(zp, vsecp, cr); 3555fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3556fa9e4066Sahrens 3557fa9e4066Sahrens return (error); 3558fa9e4066Sahrens } 3559fa9e4066Sahrens 3560fa9e4066Sahrens /*ARGSUSED*/ 3561fa9e4066Sahrens static int 3562fa9e4066Sahrens zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr) 3563fa9e4066Sahrens { 3564fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3565fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3566fa9e4066Sahrens int error; 3567fa9e4066Sahrens 3568fa9e4066Sahrens ZFS_ENTER(zfsvfs); 3569fa9e4066Sahrens error = zfs_setacl(zp, vsecp, cr); 3570fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3571fa9e4066Sahrens return (error); 3572fa9e4066Sahrens } 3573fa9e4066Sahrens 3574fa9e4066Sahrens /* 3575fa9e4066Sahrens * Predeclare these here so that the compiler assumes that 3576fa9e4066Sahrens * this is an "old style" function declaration that does 3577fa9e4066Sahrens * not include arguments => we won't get type mismatch errors 3578fa9e4066Sahrens * in the initializations that follow. 3579fa9e4066Sahrens */ 3580fa9e4066Sahrens static int zfs_inval(); 3581fa9e4066Sahrens static int zfs_isdir(); 3582fa9e4066Sahrens 3583fa9e4066Sahrens static int 3584fa9e4066Sahrens zfs_inval() 3585fa9e4066Sahrens { 3586fa9e4066Sahrens return (EINVAL); 3587fa9e4066Sahrens } 3588fa9e4066Sahrens 3589fa9e4066Sahrens static int 3590fa9e4066Sahrens zfs_isdir() 3591fa9e4066Sahrens { 3592fa9e4066Sahrens return (EISDIR); 3593fa9e4066Sahrens } 3594fa9e4066Sahrens /* 3595fa9e4066Sahrens * Directory vnode operations template 3596fa9e4066Sahrens */ 3597fa9e4066Sahrens vnodeops_t *zfs_dvnodeops; 3598fa9e4066Sahrens const fs_operation_def_t zfs_dvnodeops_template[] = { 3599fa9e4066Sahrens VOPNAME_OPEN, zfs_open, 3600fa9e4066Sahrens VOPNAME_CLOSE, zfs_close, 3601fa9e4066Sahrens VOPNAME_READ, zfs_isdir, 3602fa9e4066Sahrens VOPNAME_WRITE, zfs_isdir, 3603fa9e4066Sahrens VOPNAME_IOCTL, zfs_ioctl, 3604fa9e4066Sahrens VOPNAME_GETATTR, zfs_getattr, 3605fa9e4066Sahrens VOPNAME_SETATTR, zfs_setattr, 3606fa9e4066Sahrens VOPNAME_ACCESS, zfs_access, 3607fa9e4066Sahrens VOPNAME_LOOKUP, zfs_lookup, 3608fa9e4066Sahrens VOPNAME_CREATE, zfs_create, 3609fa9e4066Sahrens VOPNAME_REMOVE, zfs_remove, 3610fa9e4066Sahrens VOPNAME_LINK, zfs_link, 3611fa9e4066Sahrens VOPNAME_RENAME, zfs_rename, 3612fa9e4066Sahrens VOPNAME_MKDIR, zfs_mkdir, 3613fa9e4066Sahrens VOPNAME_RMDIR, zfs_rmdir, 3614fa9e4066Sahrens VOPNAME_READDIR, zfs_readdir, 3615fa9e4066Sahrens VOPNAME_SYMLINK, zfs_symlink, 3616fa9e4066Sahrens VOPNAME_FSYNC, zfs_fsync, 3617fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p) zfs_inactive, 3618fa9e4066Sahrens VOPNAME_FID, zfs_fid, 3619fa9e4066Sahrens VOPNAME_SEEK, zfs_seek, 3620fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3621fa9e4066Sahrens VOPNAME_GETSECATTR, zfs_getsecattr, 3622fa9e4066Sahrens VOPNAME_SETSECATTR, zfs_setsecattr, 3623fa9e4066Sahrens NULL, NULL 3624fa9e4066Sahrens }; 3625fa9e4066Sahrens 3626fa9e4066Sahrens /* 3627fa9e4066Sahrens * Regular file vnode operations template 3628fa9e4066Sahrens */ 3629fa9e4066Sahrens vnodeops_t *zfs_fvnodeops; 3630fa9e4066Sahrens const fs_operation_def_t zfs_fvnodeops_template[] = { 3631fa9e4066Sahrens VOPNAME_OPEN, zfs_open, 3632fa9e4066Sahrens VOPNAME_CLOSE, zfs_close, 3633fa9e4066Sahrens VOPNAME_READ, zfs_read, 3634fa9e4066Sahrens VOPNAME_WRITE, zfs_write, 3635fa9e4066Sahrens VOPNAME_IOCTL, zfs_ioctl, 3636fa9e4066Sahrens VOPNAME_GETATTR, zfs_getattr, 3637fa9e4066Sahrens VOPNAME_SETATTR, zfs_setattr, 3638fa9e4066Sahrens VOPNAME_ACCESS, zfs_access, 3639fa9e4066Sahrens VOPNAME_LOOKUP, zfs_lookup, 3640fa9e4066Sahrens VOPNAME_RENAME, zfs_rename, 3641fa9e4066Sahrens VOPNAME_FSYNC, zfs_fsync, 3642fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p)zfs_inactive, 3643fa9e4066Sahrens VOPNAME_FID, zfs_fid, 3644fa9e4066Sahrens VOPNAME_SEEK, zfs_seek, 3645fa9e4066Sahrens VOPNAME_FRLOCK, zfs_frlock, 3646fa9e4066Sahrens VOPNAME_SPACE, zfs_space, 3647fa9e4066Sahrens VOPNAME_GETPAGE, zfs_getpage, 3648fa9e4066Sahrens VOPNAME_PUTPAGE, zfs_putpage, 3649fa9e4066Sahrens VOPNAME_MAP, (fs_generic_func_p) zfs_map, 3650fa9e4066Sahrens VOPNAME_ADDMAP, (fs_generic_func_p) zfs_addmap, 3651fa9e4066Sahrens VOPNAME_DELMAP, zfs_delmap, 3652fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3653fa9e4066Sahrens VOPNAME_GETSECATTR, zfs_getsecattr, 3654fa9e4066Sahrens VOPNAME_SETSECATTR, zfs_setsecattr, 3655fa9e4066Sahrens VOPNAME_VNEVENT, fs_vnevent_support, 3656fa9e4066Sahrens NULL, NULL 3657fa9e4066Sahrens }; 3658fa9e4066Sahrens 3659fa9e4066Sahrens /* 3660fa9e4066Sahrens * Symbolic link vnode operations template 3661fa9e4066Sahrens */ 3662fa9e4066Sahrens vnodeops_t *zfs_symvnodeops; 3663fa9e4066Sahrens const fs_operation_def_t zfs_symvnodeops_template[] = { 3664fa9e4066Sahrens VOPNAME_GETATTR, zfs_getattr, 3665fa9e4066Sahrens VOPNAME_SETATTR, zfs_setattr, 3666fa9e4066Sahrens VOPNAME_ACCESS, zfs_access, 3667fa9e4066Sahrens VOPNAME_RENAME, zfs_rename, 3668fa9e4066Sahrens VOPNAME_READLINK, zfs_readlink, 3669fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p) zfs_inactive, 3670fa9e4066Sahrens VOPNAME_FID, zfs_fid, 3671fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3672fa9e4066Sahrens VOPNAME_VNEVENT, fs_vnevent_support, 3673fa9e4066Sahrens NULL, NULL 3674fa9e4066Sahrens }; 3675fa9e4066Sahrens 3676fa9e4066Sahrens /* 3677fa9e4066Sahrens * Extended attribute directory vnode operations template 3678fa9e4066Sahrens * This template is identical to the directory vnodes 3679fa9e4066Sahrens * operation template except for restricted operations: 3680fa9e4066Sahrens * VOP_MKDIR() 3681fa9e4066Sahrens * VOP_SYMLINK() 3682fa9e4066Sahrens * Note that there are other restrictions embedded in: 3683fa9e4066Sahrens * zfs_create() - restrict type to VREG 3684fa9e4066Sahrens * zfs_link() - no links into/out of attribute space 3685fa9e4066Sahrens * zfs_rename() - no moves into/out of attribute space 3686fa9e4066Sahrens */ 3687fa9e4066Sahrens vnodeops_t *zfs_xdvnodeops; 3688fa9e4066Sahrens const fs_operation_def_t zfs_xdvnodeops_template[] = { 3689fa9e4066Sahrens VOPNAME_OPEN, zfs_open, 3690fa9e4066Sahrens VOPNAME_CLOSE, zfs_close, 3691fa9e4066Sahrens VOPNAME_IOCTL, zfs_ioctl, 3692fa9e4066Sahrens VOPNAME_GETATTR, zfs_getattr, 3693fa9e4066Sahrens VOPNAME_SETATTR, zfs_setattr, 3694fa9e4066Sahrens VOPNAME_ACCESS, zfs_access, 3695fa9e4066Sahrens VOPNAME_LOOKUP, zfs_lookup, 3696fa9e4066Sahrens VOPNAME_CREATE, zfs_create, 3697fa9e4066Sahrens VOPNAME_REMOVE, zfs_remove, 3698fa9e4066Sahrens VOPNAME_LINK, zfs_link, 3699fa9e4066Sahrens VOPNAME_RENAME, zfs_rename, 3700fa9e4066Sahrens VOPNAME_MKDIR, zfs_inval, 3701fa9e4066Sahrens VOPNAME_RMDIR, zfs_rmdir, 3702fa9e4066Sahrens VOPNAME_READDIR, zfs_readdir, 3703fa9e4066Sahrens VOPNAME_SYMLINK, zfs_inval, 3704fa9e4066Sahrens VOPNAME_FSYNC, zfs_fsync, 3705fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p) zfs_inactive, 3706fa9e4066Sahrens VOPNAME_FID, zfs_fid, 3707fa9e4066Sahrens VOPNAME_SEEK, zfs_seek, 3708fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3709fa9e4066Sahrens VOPNAME_GETSECATTR, zfs_getsecattr, 3710fa9e4066Sahrens VOPNAME_SETSECATTR, zfs_setsecattr, 3711fa9e4066Sahrens VOPNAME_VNEVENT, fs_vnevent_support, 3712fa9e4066Sahrens NULL, NULL 3713fa9e4066Sahrens }; 3714fa9e4066Sahrens 3715fa9e4066Sahrens /* 3716fa9e4066Sahrens * Error vnode operations template 3717fa9e4066Sahrens */ 3718fa9e4066Sahrens vnodeops_t *zfs_evnodeops; 3719fa9e4066Sahrens const fs_operation_def_t zfs_evnodeops_template[] = { 3720fa9e4066Sahrens VOPNAME_INACTIVE, (fs_generic_func_p) zfs_inactive, 3721fa9e4066Sahrens VOPNAME_PATHCONF, zfs_pathconf, 3722fa9e4066Sahrens NULL, NULL 3723fa9e4066Sahrens }; 3724