4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
26 /* Portions Copyright 2007 Jeremy Teo */
28 #include <sys/types.h>
29 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/sysmacros.h>
33 #include <sys/resource.h>
35 #include <sys/vfs_opreg.h>
36 #include <sys/vnode.h>
40 #include <sys/taskq.h>
42 #include <sys/vmsystm.h>
43 #include <sys/atomic.h>
45 #include <vm/seg_vn.h>
49 #include <vm/seg_kpm.h>
51 #include <sys/pathname.h>
52 #include <sys/cmn_err.h>
53 #include <sys/errno.h>
54 #include <sys/unistd.h>
55 #include <sys/zfs_dir.h>
56 #include <sys/zfs_acl.h>
57 #include <sys/zfs_ioctl.h>
58 #include <sys/fs/zfs.h>
64 #include <sys/dirent.h>
65 #include <sys/policy.h>
66 #include <sys/sunddi.h>
67 #include <sys/filio.h>
69 #include "fs/fs_subr.h"
70 #include <sys/zfs_ctldir.h>
71 #include <sys/zfs_fuid.h>
73 #include <sys/zfs_rlock.h>
74 #include <sys/extdirent.h>
75 #include <sys/kidmap.h>
76 #include <sys/cred_impl.h>
82 * Each vnode op performs some logical unit of work. To do this, the ZPL must
83 * properly lock its in-core state, create a DMU transaction, do the work,
84 * record this work in the intent log (ZIL), commit the DMU transaction,
85 * and wait for the intent log to commit if it is a synchronous operation.
86 * Moreover, the vnode ops must work in both normal and log replay context.
87 * The ordering of events is important to avoid deadlocks and references
88 * to freed memory. The example below illustrates the following Big Rules:
90 * (1) A check must be made in each zfs thread for a mounted file system.
91 * This is done avoiding races using ZFS_ENTER(zfsvfs).
92 * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes
93 * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros
94 * can return EIO from the calling function.
96 * (2) VN_RELE() should always be the last thing except for zil_commit()
97 * (if necessary) and ZFS_EXIT(). This is for 3 reasons:
98 * First, if it's the last reference, the vnode/znode
99 * can be freed, so the zp may point to freed memory. Second, the last
100 * reference will call zfs_zinactive(), which may induce a lot of work --
101 * pushing cached pages (which acquires range locks) and syncing out
102 * cached atime changes. Third, zfs_zinactive() may require a new tx,
103 * which could deadlock the system if you were already holding one.
105 * (3) All range locks must be grabbed before calling dmu_tx_assign(),
106 * as they can span dmu_tx_assign() calls.
108 * (4) Always pass TXG_NOWAIT as the second argument to dmu_tx_assign().
109 * This is critical because we don't want to block while holding locks.
110 * Note, in particular, that if a lock is sometimes acquired before
111 * the tx assigns, and sometimes after (e.g. z_lock), then failing to
112 * use a non-blocking assign can deadlock the system. The scenario:
114 * Thread A has grabbed a lock before calling dmu_tx_assign().
115 * Thread B is in an already-assigned tx, and blocks for this lock.
116 * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open()
117 * forever, because the previous txg can't quiesce until B's tx commits.
119 * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT,
120 * then drop all locks, call dmu_tx_wait(), and try again.
122 * (5) If the operation succeeded, generate the intent log entry for it
123 * before dropping locks. This ensures that the ordering of events
124 * in the intent log matches the order in which they actually occurred.
125 * During ZIL replay the zfs_log_* functions will update the sequence
126 * number to indicate the zil transaction has replayed.
128 * (6) At the end of each vnode op, the DMU tx must always commit,
129 * regardless of whether there were any errors.
131 * (7) After dropping all locks, invoke zil_commit(zilog, seq, foid)
132 * to ensure that synchronous semantics are provided when necessary.
134 * In general, this is how things should be ordered in each vnode op:
136 * ZFS_ENTER(zfsvfs); // exit if unmounted
138 * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD())
139 * rw_enter(...); // grab any other locks you need
140 * tx = dmu_tx_create(...); // get DMU tx
141 * dmu_tx_hold_*(); // hold each object you might modify
142 * error = dmu_tx_assign(tx, TXG_NOWAIT); // try to assign
144 * rw_exit(...); // drop locks
145 * zfs_dirent_unlock(dl); // unlock directory entry
146 * VN_RELE(...); // release held vnodes
147 * if (error == ERESTART) {
152 * dmu_tx_abort(tx); // abort DMU tx
153 * ZFS_EXIT(zfsvfs); // finished in zfs
154 * return (error); // really out of space
156 * error = do_real_work(); // do whatever this VOP does
158 * zfs_log_*(...); // on success, make ZIL entry
159 * dmu_tx_commit(tx); // commit DMU tx -- error or not
160 * rw_exit(...); // drop locks
161 * zfs_dirent_unlock(dl); // unlock directory entry
162 * VN_RELE(...); // release held vnodes
163 * zil_commit(zilog, seq, foid); // synchronous when necessary
164 * ZFS_EXIT(zfsvfs); // finished in zfs
165 * return (error); // done, report error
170 zfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct)
172 znode_t *zp = VTOZ(*vpp);
173 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
178 if ((flag & FWRITE) && (zp->z_phys->zp_flags & ZFS_APPENDONLY) &&
179 ((flag & FAPPEND) == 0)) {
184 if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan &&
185 ZTOV(zp)->v_type == VREG &&
186 !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) &&
187 zp->z_phys->zp_size > 0) {
188 if (fs_vscan(*vpp, cr, 0) != 0) {
194 /* Keep a count of the synchronous opens in the znode */
195 if (flag & (FSYNC | FDSYNC))
196 atomic_inc_32(&zp->z_sync_cnt);
204 zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr,
205 caller_context_t *ct)
207 znode_t *zp = VTOZ(vp);
208 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
213 /* Decrement the synchronous opens in the znode */
214 if ((flag & (FSYNC | FDSYNC)) && (count == 1))
215 atomic_dec_32(&zp->z_sync_cnt);
218 * Clean up any locks held by this process on the vp.
220 cleanlocks(vp, ddi_get_pid(), 0);
221 cleanshares(vp, ddi_get_pid());
223 if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan &&
224 ZTOV(zp)->v_type == VREG &&
225 !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) &&
226 zp->z_phys->zp_size > 0)
227 VERIFY(fs_vscan(vp, cr, 1) == 0);
234 * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and
235 * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter.
238 zfs_holey(vnode_t *vp, int cmd, offset_t *off)
240 znode_t *zp = VTOZ(vp);
241 uint64_t noff = (uint64_t)*off; /* new offset */
246 file_sz = zp->z_phys->zp_size;
247 if (noff >= file_sz) {
251 if (cmd == _FIO_SEEK_HOLE)
256 error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff);
259 if ((error == ESRCH) || (noff > file_sz)) {
261 * Handle the virtual hole at the end of file.
278 zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred,
279 int *rvalp, caller_context_t *ct)
288 return (zfs_sync(vp->v_vfsp, 0, cred));
291 * The following two ioctls are used by bfu. Faking out,
292 * necessary to avoid bfu errors.
300 if (ddi_copyin((void *)data, &off, sizeof (off), flag))
304 zfsvfs = zp->z_zfsvfs;
308 /* offset parameter is in/out */
309 error = zfs_holey(vp, com, &off);
313 if (ddi_copyout(&off, (void *)data, sizeof (off), flag))
321 * Utility functions to map and unmap a single physical page. These
322 * are used to manage the mappable copies of ZFS file data, and therefore
323 * do not update ref/mod bits.
326 zfs_map_page(page_t *pp, enum seg_rw rw)
329 return (hat_kpm_mapin(pp, 0));
330 ASSERT(rw == S_READ || rw == S_WRITE);
331 return (ppmapin(pp, PROT_READ | ((rw == S_WRITE) ? PROT_WRITE : 0),
336 zfs_unmap_page(page_t *pp, caddr_t addr)
339 hat_kpm_mapout(pp, 0, addr);
346 * When a file is memory mapped, we must keep the IO data synchronized
347 * between the DMU cache and the memory mapped pages. What this means:
349 * On Write: If we find a memory mapped page, we write to *both*
350 * the page and the dmu buffer.
353 update_pages(vnode_t *vp, int64_t start, int len, objset_t *os, uint64_t oid)
357 off = start & PAGEOFFSET;
358 for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
360 uint64_t nbytes = MIN(PAGESIZE - off, len);
362 if (pp = page_lookup(vp, start, SE_SHARED)) {
365 va = zfs_map_page(pp, S_WRITE);
366 (void) dmu_read(os, oid, start+off, nbytes, va+off);
367 zfs_unmap_page(pp, va);
376 * When a file is memory mapped, we must keep the IO data synchronized
377 * between the DMU cache and the memory mapped pages. What this means:
379 * On Read: We "read" preferentially from memory mapped pages,
380 * else we default from the dmu buffer.
382 * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
383 * the file is memory mapped.
386 mappedread(vnode_t *vp, int nbytes, uio_t *uio)
388 znode_t *zp = VTOZ(vp);
389 objset_t *os = zp->z_zfsvfs->z_os;
394 start = uio->uio_loffset;
395 off = start & PAGEOFFSET;
396 for (start &= PAGEMASK; len > 0; start += PAGESIZE) {
398 uint64_t bytes = MIN(PAGESIZE - off, len);
400 if (pp = page_lookup(vp, start, SE_SHARED)) {
403 va = zfs_map_page(pp, S_READ);
404 error = uiomove(va + off, bytes, UIO_READ, uio);
405 zfs_unmap_page(pp, va);
408 error = dmu_read_uio(os, zp->z_id, uio, bytes);
418 offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */
421 * Read bytes from specified file into supplied buffer.
423 * IN: vp - vnode of file to be read from.
424 * uio - structure supplying read location, range info,
426 * ioflag - SYNC flags; used to provide FRSYNC semantics.
427 * cr - credentials of caller.
428 * ct - caller context
430 * OUT: uio - updated offset and range, buffer filled.
432 * RETURN: 0 if success
433 * error code if failure
436 * vp - atime updated if byte count > 0
440 zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct)
442 znode_t *zp = VTOZ(vp);
443 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
453 if (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) {
459 * Validate file offset
461 if (uio->uio_loffset < (offset_t)0) {
467 * Fasttrack empty reads
469 if (uio->uio_resid == 0) {
475 * Check for mandatory locks
477 if (MANDMODE((mode_t)zp->z_phys->zp_mode)) {
478 if (error = chklock(vp, FREAD,
479 uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) {
486 * If we're in FRSYNC mode, sync out this znode before reading it.
489 zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id);
492 * Lock the range against changes.
494 rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER);
497 * If we are reading past end-of-file we can skip
498 * to the end; but we might still need to set atime.
500 if (uio->uio_loffset >= zp->z_phys->zp_size) {
505 ASSERT(uio->uio_loffset < zp->z_phys->zp_size);
506 n = MIN(uio->uio_resid, zp->z_phys->zp_size - uio->uio_loffset);
509 nbytes = MIN(n, zfs_read_chunk_size -
510 P2PHASE(uio->uio_loffset, zfs_read_chunk_size));
512 if (vn_has_cached_data(vp))
513 error = mappedread(vp, nbytes, uio);
515 error = dmu_read_uio(os, zp->z_id, uio, nbytes);
517 /* convert checksum errors into IO errors */
527 zfs_range_unlock(rl);
529 ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
535 * Write the bytes to a file.
537 * IN: vp - vnode of file to be written to.
538 * uio - structure supplying write location, range info,
540 * ioflag - FAPPEND flag set if in append mode.
541 * cr - credentials of caller.
542 * ct - caller context (NFS/CIFS fem monitor only)
544 * OUT: uio - updated offset and range.
546 * RETURN: 0 if success
547 * error code if failure
550 * vp - ctime|mtime updated if byte count > 0
554 zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct)
556 znode_t *zp = VTOZ(vp);
557 rlim64_t limit = uio->uio_llimit;
558 ssize_t start_resid = uio->uio_resid;
562 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
567 int max_blksz = zfsvfs->z_max_blksz;
572 * Fasttrack empty write
578 if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T)
585 * If immutable or not appending then return EPERM
587 pflags = zp->z_phys->zp_flags;
588 if ((pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) ||
589 ((pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) &&
590 (uio->uio_loffset < zp->z_phys->zp_size))) {
595 zilog = zfsvfs->z_log;
598 * Pre-fault the pages to ensure slow (eg NFS) pages
601 uio_prefaultpages(n, uio);
604 * If in append mode, set the io offset pointer to eof.
606 if (ioflag & FAPPEND) {
608 * Range lock for a file append:
609 * The value for the start of range will be determined by
610 * zfs_range_lock() (to guarantee append semantics).
611 * If this write will cause the block size to increase,
612 * zfs_range_lock() will lock the entire file, so we must
613 * later reduce the range after we grow the block size.
615 rl = zfs_range_lock(zp, 0, n, RL_APPEND);
616 if (rl->r_len == UINT64_MAX) {
617 /* overlocked, zp_size can't change */
618 woff = uio->uio_loffset = zp->z_phys->zp_size;
620 woff = uio->uio_loffset = rl->r_off;
623 woff = uio->uio_loffset;
625 * Validate file offset
633 * If we need to grow the block size then zfs_range_lock()
634 * will lock a wider range than we request here.
635 * Later after growing the block size we reduce the range.
637 rl = zfs_range_lock(zp, woff, n, RL_WRITER);
641 zfs_range_unlock(rl);
646 if ((woff + n) > limit || woff > (limit - n))
650 * Check for mandatory locks
652 if (MANDMODE((mode_t)zp->z_phys->zp_mode) &&
653 (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) {
654 zfs_range_unlock(rl);
658 end_size = MAX(zp->z_phys->zp_size, woff + n);
661 * Write the file in reasonable size chunks. Each chunk is written
662 * in a separate transaction; this keeps the intent log records small
663 * and allows us to do more fine-grained space accounting.
667 * Start a transaction.
669 woff = uio->uio_loffset;
670 tx = dmu_tx_create(zfsvfs->z_os);
671 dmu_tx_hold_bonus(tx, zp->z_id);
672 dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz));
673 error = dmu_tx_assign(tx, TXG_NOWAIT);
675 if (error == ERESTART) {
685 * If zfs_range_lock() over-locked we grow the blocksize
686 * and then reduce the lock range. This will only happen
687 * on the first iteration since zfs_range_reduce() will
688 * shrink down r_len to the appropriate size.
690 if (rl->r_len == UINT64_MAX) {
693 if (zp->z_blksz > max_blksz) {
694 ASSERT(!ISP2(zp->z_blksz));
695 new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE);
697 new_blksz = MIN(end_size, max_blksz);
699 zfs_grow_blocksize(zp, new_blksz, tx);
700 zfs_range_reduce(rl, woff, n);
704 * XXX - should we really limit each write to z_max_blksz?
705 * Perhaps we should use SPA_MAXBLOCKSIZE chunks?
707 nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz));
709 tx_bytes = uio->uio_resid;
710 error = dmu_write_uio(zfsvfs->z_os, zp->z_id, uio, nbytes, tx);
711 tx_bytes -= uio->uio_resid;
712 if (tx_bytes && vn_has_cached_data(vp))
713 update_pages(vp, woff,
714 tx_bytes, zfsvfs->z_os, zp->z_id);
717 * If we made no progress, we're done. If we made even
718 * partial progress, update the znode and ZIL accordingly.
727 * Clear Set-UID/Set-GID bits on successful write if not
728 * privileged and at least one of the excute bits is set.
730 * It would be nice to to this after all writes have
731 * been done, but that would still expose the ISUID/ISGID
732 * to another app after the partial write is committed.
734 * Note: we don't call zfs_fuid_map_id() here because
735 * user 0 is not an ephemeral uid.
737 mutex_enter(&zp->z_acl_lock);
738 if ((zp->z_phys->zp_mode & (S_IXUSR | (S_IXUSR >> 3) |
739 (S_IXUSR >> 6))) != 0 &&
740 (zp->z_phys->zp_mode & (S_ISUID | S_ISGID)) != 0 &&
741 secpolicy_vnode_setid_retain(cr,
742 (zp->z_phys->zp_mode & S_ISUID) != 0 &&
743 zp->z_phys->zp_uid == 0) != 0) {
744 zp->z_phys->zp_mode &= ~(S_ISUID | S_ISGID);
746 mutex_exit(&zp->z_acl_lock);
749 * Update time stamp. NOTE: This marks the bonus buffer as
750 * dirty, so we don't have to do it again for zp_size.
752 zfs_time_stamper(zp, CONTENT_MODIFIED, tx);
755 * Update the file size (zp_size) if it has changed;
756 * account for possible concurrent updates.
758 while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset)
759 (void) atomic_cas_64(&zp->z_phys->zp_size, end_size,
761 zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag);
766 ASSERT(tx_bytes == nbytes);
770 zfs_range_unlock(rl);
773 * If we're in replay mode, or we made no progress, return error.
774 * Otherwise, it's at least a partial write, so it's successful.
776 if (zfsvfs->z_replay || uio->uio_resid == start_resid) {
781 if (ioflag & (FSYNC | FDSYNC))
782 zil_commit(zilog, zp->z_last_itx, zp->z_id);
789 zfs_get_done(dmu_buf_t *db, void *vzgd)
791 zgd_t *zgd = (zgd_t *)vzgd;
792 rl_t *rl = zgd->zgd_rl;
793 vnode_t *vp = ZTOV(rl->r_zp);
795 dmu_buf_rele(db, vzgd);
796 zfs_range_unlock(rl);
798 zil_add_block(zgd->zgd_zilog, zgd->zgd_bp);
799 kmem_free(zgd, sizeof (zgd_t));
803 * Get data to generate a TX_WRITE intent log record.
806 zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio)
808 zfsvfs_t *zfsvfs = arg;
809 objset_t *os = zfsvfs->z_os;
811 uint64_t off = lr->lr_offset;
815 int dlen = lr->lr_length; /* length of user data */
822 * Nothing to do if the file has been removed
824 if (zfs_zget(zfsvfs, lr->lr_foid, &zp) != 0)
826 if (zp->z_unlinked) {
832 * Write records come in two flavors: immediate and indirect.
833 * For small writes it's cheaper to store the data with the
834 * log record (immediate); for large writes it's cheaper to
835 * sync the data and get a pointer to it (indirect) so that
836 * we don't have to write the data twice.
838 if (buf != NULL) { /* immediate write */
839 rl = zfs_range_lock(zp, off, dlen, RL_READER);
840 /* test for truncation needs to be done while range locked */
841 if (off >= zp->z_phys->zp_size) {
845 VERIFY(0 == dmu_read(os, lr->lr_foid, off, dlen, buf));
846 } else { /* indirect write */
847 uint64_t boff; /* block starting offset */
850 * Have to lock the whole block to ensure when it's
851 * written out and it's checksum is being calculated
852 * that no one can change the data. We need to re-check
853 * blocksize after we get the lock in case it's changed!
856 if (ISP2(zp->z_blksz)) {
857 boff = P2ALIGN_TYPED(off, zp->z_blksz,
863 rl = zfs_range_lock(zp, boff, dlen, RL_READER);
864 if (zp->z_blksz == dlen)
866 zfs_range_unlock(rl);
868 /* test for truncation needs to be done while range locked */
869 if (off >= zp->z_phys->zp_size) {
873 zgd = (zgd_t *)kmem_alloc(sizeof (zgd_t), KM_SLEEP);
875 zgd->zgd_zilog = zfsvfs->z_log;
876 zgd->zgd_bp = &lr->lr_blkptr;
877 VERIFY(0 == dmu_buf_hold(os, lr->lr_foid, boff, zgd, &db));
878 ASSERT(boff == db->db_offset);
879 lr->lr_blkoff = off - boff;
880 error = dmu_sync(zio, db, &lr->lr_blkptr,
881 lr->lr_common.lrc_txg, zfs_get_done, zgd);
882 ASSERT((error && error != EINPROGRESS) ||
883 lr->lr_length <= zp->z_blksz);
885 zil_add_block(zfsvfs->z_log, &lr->lr_blkptr);
887 * If we get EINPROGRESS, then we need to wait for a
888 * write IO initiated by dmu_sync() to complete before
889 * we can release this dbuf. We will finish everything
890 * up in the zfs_get_done() callback.
892 if (error == EINPROGRESS)
894 dmu_buf_rele(db, zgd);
895 kmem_free(zgd, sizeof (zgd_t));
898 zfs_range_unlock(rl);
905 zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr,
906 caller_context_t *ct)
908 znode_t *zp = VTOZ(vp);
909 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
915 if (flag & V_ACE_MASK)
916 error = zfs_zaccess(zp, mode, flag, B_FALSE, cr);
918 error = zfs_zaccess_rwx(zp, mode, flag, cr);
925 * Lookup an entry in a directory, or an extended attribute directory.
926 * If it exists, return a held vnode reference for it.
928 * IN: dvp - vnode of directory to search.
929 * nm - name of entry to lookup.
930 * pnp - full pathname to lookup [UNUSED].
931 * flags - LOOKUP_XATTR set if looking for an attribute.
932 * rdir - root directory vnode [UNUSED].
933 * cr - credentials of caller.
934 * ct - caller context
935 * direntflags - directory lookup flags
936 * realpnp - returned pathname.
938 * OUT: vpp - vnode of located entry, NULL if not found.
940 * RETURN: 0 if success
941 * error code if failure
948 zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp,
949 int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
950 int *direntflags, pathname_t *realpnp)
952 znode_t *zdp = VTOZ(dvp);
953 zfsvfs_t *zfsvfs = zdp->z_zfsvfs;
961 if (flags & LOOKUP_XATTR) {
963 * If the xattr property is off, refuse the lookup request.
965 if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) {
971 * We don't allow recursive attributes..
972 * Maybe someday we will.
974 if (zdp->z_phys->zp_flags & ZFS_XATTR) {
979 if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) {
985 * Do we have permission to get into attribute directory?
988 if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0,
998 if (dvp->v_type != VDIR) {
1004 * Check accessibility of directory.
1007 if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) {
1012 if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm),
1013 NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
1018 error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp);
1021 * Convert device special files
1023 if (IS_DEVVP(*vpp)) {
1026 svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr);
1040 * Attempt to create a new entry in a directory. If the entry
1041 * already exists, truncate the file if permissible, else return
1042 * an error. Return the vp of the created or trunc'd file.
1044 * IN: dvp - vnode of directory to put new file entry in.
1045 * name - name of new file entry.
1046 * vap - attributes of new file.
1047 * excl - flag indicating exclusive or non-exclusive mode.
1048 * mode - mode to open file with.
1049 * cr - credentials of caller.
1050 * flag - large file flag [UNUSED].
1051 * ct - caller context
1052 * vsecp - ACL to be set
1054 * OUT: vpp - vnode of created or trunc'd entry.
1056 * RETURN: 0 if success
1057 * error code if failure
1060 * dvp - ctime|mtime updated if new entry created
1061 * vp - ctime|mtime always, atime if new
1066 zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl,
1067 int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct,
1070 znode_t *zp, *dzp = VTOZ(dvp);
1071 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1077 zfs_acl_t *aclp = NULL;
1078 zfs_fuid_info_t *fuidp = NULL;
1081 gid_t gid = crgetgid(cr);
1084 * If we have an ephemeral id, ACL, or XVATTR then
1085 * make sure file system is at proper version
1088 ksid = crgetsid(cr, KSID_OWNER);
1090 uid = ksid_getid(ksid);
1094 if (zfsvfs->z_use_fuids == B_FALSE &&
1095 (vsecp || (vap->va_mask & AT_XVATTR) ||
1096 IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
1102 zilog = zfsvfs->z_log;
1104 if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
1105 NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
1110 if (vap->va_mask & AT_XVATTR) {
1111 if ((error = secpolicy_xvattr((xvattr_t *)vap,
1112 crgetuid(cr), cr, vap->va_type)) != 0) {
1120 if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr))
1121 vap->va_mode &= ~VSVTX;
1123 if (*name == '\0') {
1125 * Null component name refers to the directory itself.
1132 /* possible VN_HOLD(zp) */
1135 if (flag & FIGNORECASE)
1138 error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
1141 if (strcmp(name, "..") == 0)
1149 if (vsecp && aclp == NULL) {
1150 error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, &aclp);
1154 zfs_dirent_unlock(dl);
1163 * Create a new file object and update the directory
1166 if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) {
1171 * We only support the creation of regular files in
1172 * extended attribute directories.
1174 if ((dzp->z_phys->zp_flags & ZFS_XATTR) &&
1175 (vap->va_type != VREG)) {
1180 tx = dmu_tx_create(os);
1181 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
1182 if ((aclp && aclp->z_has_fuids) || IS_EPHEMERAL(uid) ||
1183 IS_EPHEMERAL(gid)) {
1184 if (zfsvfs->z_fuid_obj == 0) {
1185 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
1186 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
1187 FUID_SIZE_ESTIMATE(zfsvfs));
1188 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ,
1191 dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj);
1192 dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0,
1193 FUID_SIZE_ESTIMATE(zfsvfs));
1196 dmu_tx_hold_bonus(tx, dzp->z_id);
1197 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
1198 if ((dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) || aclp) {
1199 dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
1200 0, SPA_MAXBLOCKSIZE);
1202 error = dmu_tx_assign(tx, TXG_NOWAIT);
1204 zfs_dirent_unlock(dl);
1205 if (error == ERESTART) {
1216 zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, aclp, &fuidp);
1217 (void) zfs_link_create(dl, zp, tx, ZNEW);
1218 txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap);
1219 if (flag & FIGNORECASE)
1221 zfs_log_create(zilog, tx, txtype, dzp, zp, name,
1224 zfs_fuid_info_free(fuidp);
1227 int aflags = (flag & FAPPEND) ? V_APPEND : 0;
1230 * A directory entry already exists for this name.
1233 * Can't truncate an existing file if in exclusive mode.
1240 * Can't open a directory for writing.
1242 if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) {
1247 * Verify requested access to file.
1249 if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) {
1253 mutex_enter(&dzp->z_lock);
1255 mutex_exit(&dzp->z_lock);
1258 * Truncate regular files if requested.
1260 if ((ZTOV(zp)->v_type == VREG) &&
1261 (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) {
1262 /* we can't hold any locks when calling zfs_freesp() */
1263 zfs_dirent_unlock(dl);
1265 error = zfs_freesp(zp, 0, 0, mode, TRUE);
1267 vnevent_create(ZTOV(zp), ct);
1274 zfs_dirent_unlock(dl);
1282 * If vnode is for a device return a specfs vnode instead.
1284 if (IS_DEVVP(*vpp)) {
1287 svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr);
1303 * Remove an entry from a directory.
1305 * IN: dvp - vnode of directory to remove entry from.
1306 * name - name of entry to remove.
1307 * cr - credentials of caller.
1308 * ct - caller context
1309 * flags - case flags
1311 * RETURN: 0 if success
1312 * error code if failure
1316 * vp - ctime (if nlink > 0)
1320 zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct,
1323 znode_t *zp, *dzp = VTOZ(dvp);
1324 znode_t *xzp = NULL;
1326 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1328 uint64_t acl_obj, xattr_obj;
1331 boolean_t may_delete_now, delete_now = FALSE;
1332 boolean_t unlinked, toobig = FALSE;
1334 pathname_t *realnmp = NULL;
1341 zilog = zfsvfs->z_log;
1343 if (flags & FIGNORECASE) {
1351 * Attempt to lock directory; fail if entry doesn't exist.
1353 if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
1363 if (error = zfs_zaccess_delete(dzp, zp, cr)) {
1368 * Need to use rmdir for removing directories.
1370 if (vp->v_type == VDIR) {
1375 vnevent_remove(vp, dvp, name, ct);
1378 dnlc_remove(dvp, realnmp->pn_buf);
1380 dnlc_remove(dvp, name);
1382 mutex_enter(&vp->v_lock);
1383 may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp);
1384 mutex_exit(&vp->v_lock);
1387 * We may delete the znode now, or we may put it in the unlinked set;
1388 * it depends on whether we're the last link, and on whether there are
1389 * other holds on the vnode. So we dmu_tx_hold() the right things to
1390 * allow for either case.
1392 tx = dmu_tx_create(zfsvfs->z_os);
1393 dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
1394 dmu_tx_hold_bonus(tx, zp->z_id);
1395 if (may_delete_now) {
1397 zp->z_phys->zp_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT;
1398 /* if the file is too big, only hold_free a token amount */
1399 dmu_tx_hold_free(tx, zp->z_id, 0,
1400 (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END));
1403 /* are there any extended attributes? */
1404 if ((xattr_obj = zp->z_phys->zp_xattr) != 0) {
1405 /* XXX - do we need this if we are deleting? */
1406 dmu_tx_hold_bonus(tx, xattr_obj);
1409 /* are there any additional acls */
1410 if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 &&
1412 dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END);
1414 /* charge as an update -- would be nice not to charge at all */
1415 dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
1417 error = dmu_tx_assign(tx, TXG_NOWAIT);
1419 zfs_dirent_unlock(dl);
1421 if (error == ERESTART) {
1434 * Remove the directory entry.
1436 error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked);
1444 mutex_enter(&vp->v_lock);
1445 delete_now = may_delete_now && !toobig &&
1446 vp->v_count == 1 && !vn_has_cached_data(vp) &&
1447 zp->z_phys->zp_xattr == xattr_obj &&
1448 zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj;
1449 mutex_exit(&vp->v_lock);
1453 if (zp->z_phys->zp_xattr) {
1454 error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp);
1455 ASSERT3U(error, ==, 0);
1456 ASSERT3U(xzp->z_phys->zp_links, ==, 2);
1457 dmu_buf_will_dirty(xzp->z_dbuf, tx);
1458 mutex_enter(&xzp->z_lock);
1459 xzp->z_unlinked = 1;
1460 xzp->z_phys->zp_links = 0;
1461 mutex_exit(&xzp->z_lock);
1462 zfs_unlinked_add(xzp, tx);
1463 zp->z_phys->zp_xattr = 0; /* probably unnecessary */
1465 mutex_enter(&zp->z_lock);
1466 mutex_enter(&vp->v_lock);
1468 ASSERT3U(vp->v_count, ==, 0);
1469 mutex_exit(&vp->v_lock);
1470 mutex_exit(&zp->z_lock);
1471 zfs_znode_delete(zp, tx);
1472 } else if (unlinked) {
1473 zfs_unlinked_add(zp, tx);
1477 if (flags & FIGNORECASE)
1479 zfs_log_remove(zilog, tx, txtype, dzp, name);
1486 zfs_dirent_unlock(dl);
1491 /* this rele is delayed to prevent nesting transactions */
1500 * Create a new directory and insert it into dvp using the name
1501 * provided. Return a pointer to the inserted directory.
1503 * IN: dvp - vnode of directory to add subdir to.
1504 * dirname - name of new directory.
1505 * vap - attributes of new directory.
1506 * cr - credentials of caller.
1507 * ct - caller context
1508 * vsecp - ACL to be set
1510 * OUT: vpp - vnode of created directory.
1512 * RETURN: 0 if success
1513 * error code if failure
1516 * dvp - ctime|mtime updated
1517 * vp - ctime|mtime|atime updated
1521 zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr,
1522 caller_context_t *ct, int flags, vsecattr_t *vsecp)
1524 znode_t *zp, *dzp = VTOZ(dvp);
1525 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1531 zfs_acl_t *aclp = NULL;
1532 zfs_fuid_info_t *fuidp = NULL;
1536 gid_t gid = crgetgid(cr);
1538 ASSERT(vap->va_type == VDIR);
1541 * If we have an ephemeral id, ACL, or XVATTR then
1542 * make sure file system is at proper version
1545 ksid = crgetsid(cr, KSID_OWNER);
1547 uid = ksid_getid(ksid);
1550 if (zfsvfs->z_use_fuids == B_FALSE &&
1551 (vsecp || (vap->va_mask & AT_XVATTR) ||
1552 IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid)))
1557 zilog = zfsvfs->z_log;
1559 if (dzp->z_phys->zp_flags & ZFS_XATTR) {
1564 if (zfsvfs->z_utf8 && u8_validate(dirname,
1565 strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
1569 if (flags & FIGNORECASE)
1572 if (vap->va_mask & AT_XVATTR)
1573 if ((error = secpolicy_xvattr((xvattr_t *)vap,
1574 crgetuid(cr), cr, vap->va_type)) != 0) {
1580 * First make sure the new directory doesn't exist.
1585 if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf,
1591 if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) {
1592 zfs_dirent_unlock(dl);
1597 if (vsecp && aclp == NULL) {
1598 error = zfs_vsec_2_aclp(zfsvfs, vap->va_type, vsecp, &aclp);
1600 zfs_dirent_unlock(dl);
1606 * Add a new entry to the directory.
1608 tx = dmu_tx_create(zfsvfs->z_os);
1609 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname);
1610 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
1611 if ((aclp && aclp->z_has_fuids) || IS_EPHEMERAL(uid) ||
1612 IS_EPHEMERAL(gid)) {
1613 if (zfsvfs->z_fuid_obj == 0) {
1614 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
1615 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
1616 FUID_SIZE_ESTIMATE(zfsvfs));
1617 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL);
1619 dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj);
1620 dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0,
1621 FUID_SIZE_ESTIMATE(zfsvfs));
1624 if ((dzp->z_phys->zp_flags & ZFS_INHERIT_ACE) || aclp)
1625 dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
1626 0, SPA_MAXBLOCKSIZE);
1627 error = dmu_tx_assign(tx, TXG_NOWAIT);
1629 zfs_dirent_unlock(dl);
1630 if (error == ERESTART) {
1645 zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, aclp, &fuidp);
1651 * Now put new name in parent dir.
1653 (void) zfs_link_create(dl, zp, tx, ZNEW);
1657 txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap);
1658 if (flags & FIGNORECASE)
1660 zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, fuidp, vap);
1663 zfs_fuid_info_free(fuidp);
1666 zfs_dirent_unlock(dl);
1673 * Remove a directory subdir entry. If the current working
1674 * directory is the same as the subdir to be removed, the
1677 * IN: dvp - vnode of directory to remove from.
1678 * name - name of directory to be removed.
1679 * cwd - vnode of current working directory.
1680 * cr - credentials of caller.
1681 * ct - caller context
1682 * flags - case flags
1684 * RETURN: 0 if success
1685 * error code if failure
1688 * dvp - ctime|mtime updated
1692 zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr,
1693 caller_context_t *ct, int flags)
1695 znode_t *dzp = VTOZ(dvp);
1698 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
1707 zilog = zfsvfs->z_log;
1709 if (flags & FIGNORECASE)
1715 * Attempt to lock directory; fail if entry doesn't exist.
1717 if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg,
1725 if (error = zfs_zaccess_delete(dzp, zp, cr)) {
1729 if (vp->v_type != VDIR) {
1739 vnevent_rmdir(vp, dvp, name, ct);
1742 * Grab a lock on the directory to make sure that noone is
1743 * trying to add (or lookup) entries while we are removing it.
1745 rw_enter(&zp->z_name_lock, RW_WRITER);
1748 * Grab a lock on the parent pointer to make sure we play well
1749 * with the treewalk and directory rename code.
1751 rw_enter(&zp->z_parent_lock, RW_WRITER);
1753 tx = dmu_tx_create(zfsvfs->z_os);
1754 dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name);
1755 dmu_tx_hold_bonus(tx, zp->z_id);
1756 dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
1757 error = dmu_tx_assign(tx, TXG_NOWAIT);
1759 rw_exit(&zp->z_parent_lock);
1760 rw_exit(&zp->z_name_lock);
1761 zfs_dirent_unlock(dl);
1763 if (error == ERESTART) {
1773 error = zfs_link_destroy(dl, zp, tx, zflg, NULL);
1776 uint64_t txtype = TX_RMDIR;
1777 if (flags & FIGNORECASE)
1779 zfs_log_remove(zilog, tx, txtype, dzp, name);
1784 rw_exit(&zp->z_parent_lock);
1785 rw_exit(&zp->z_name_lock);
1787 zfs_dirent_unlock(dl);
1796 * Read as many directory entries as will fit into the provided
1797 * buffer from the given directory cursor position (specified in
1798 * the uio structure.
1800 * IN: vp - vnode of directory to read.
1801 * uio - structure supplying read location, range info,
1802 * and return buffer.
1803 * cr - credentials of caller.
1804 * ct - caller context
1805 * flags - case flags
1807 * OUT: uio - updated offset and range, buffer filled.
1808 * eofp - set to true if end-of-file detected.
1810 * RETURN: 0 if success
1811 * error code if failure
1814 * vp - atime updated
1816 * Note that the low 4 bits of the cookie returned by zap is always zero.
1817 * This allows us to use the low range for "special" directory entries:
1818 * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem,
1819 * we use the offset 2 for the '.zfs' directory.
1823 zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp,
1824 caller_context_t *ct, int flags)
1826 znode_t *zp = VTOZ(vp);
1830 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
1835 zap_attribute_t zap;
1836 uint_t bytes_wanted;
1837 uint64_t offset; /* must be unsigned; checks for < 1 */
1842 boolean_t check_sysattrs;
1848 * If we are not given an eof variable,
1855 * Check for valid iov_len.
1857 if (uio->uio_iov->iov_len <= 0) {
1863 * Quit if directory has been removed (posix)
1865 if ((*eofp = zp->z_unlinked) != 0) {
1872 offset = uio->uio_loffset;
1873 prefetch = zp->z_zn_prefetch;
1876 * Initialize the iterator cursor.
1880 * Start iteration from the beginning of the directory.
1882 zap_cursor_init(&zc, os, zp->z_id);
1885 * The offset is a serialized cursor.
1887 zap_cursor_init_serialized(&zc, os, zp->z_id, offset);
1891 * Get space to change directory entries into fs independent format.
1893 iovp = uio->uio_iov;
1894 bytes_wanted = iovp->iov_len;
1895 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) {
1896 bufsize = bytes_wanted;
1897 outbuf = kmem_alloc(bufsize, KM_SLEEP);
1898 odp = (struct dirent64 *)outbuf;
1900 bufsize = bytes_wanted;
1901 odp = (struct dirent64 *)iovp->iov_base;
1903 eodp = (struct edirent *)odp;
1906 * If this VFS supports the system attribute view interface; and
1907 * we're looking at an extended attribute directory; and we care
1908 * about normalization conflicts on this vfs; then we must check
1909 * for normalization conflicts with the sysattr name space.
1911 check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) &&
1912 (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm &&
1913 (flags & V_RDDIR_ENTFLAGS);
1916 * Transform to file-system independent format
1919 while (outcount < bytes_wanted) {
1925 * Special case `.', `..', and `.zfs'.
1928 (void) strcpy(zap.za_name, ".");
1929 zap.za_normalization_conflict = 0;
1931 } else if (offset == 1) {
1932 (void) strcpy(zap.za_name, "..");
1933 zap.za_normalization_conflict = 0;
1934 objnum = zp->z_phys->zp_parent;
1935 } else if (offset == 2 && zfs_show_ctldir(zp)) {
1936 (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME);
1937 zap.za_normalization_conflict = 0;
1938 objnum = ZFSCTL_INO_ROOT;
1943 if (error = zap_cursor_retrieve(&zc, &zap)) {
1944 if ((*eofp = (error == ENOENT)) != 0)
1950 if (zap.za_integer_length != 8 ||
1951 zap.za_num_integers != 1) {
1952 cmn_err(CE_WARN, "zap_readdir: bad directory "
1953 "entry, obj = %lld, offset = %lld\n",
1954 (u_longlong_t)zp->z_id,
1955 (u_longlong_t)offset);
1960 objnum = ZFS_DIRENT_OBJ(zap.za_first_integer);
1962 * MacOS X can extract the object type here such as:
1963 * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer);
1966 if (check_sysattrs && !zap.za_normalization_conflict) {
1967 zap.za_normalization_conflict =
1968 xattr_sysattr_casechk(zap.za_name);
1972 if (flags & V_RDDIR_ENTFLAGS)
1973 reclen = EDIRENT_RECLEN(strlen(zap.za_name));
1975 reclen = DIRENT64_RECLEN(strlen(zap.za_name));
1978 * Will this entry fit in the buffer?
1980 if (outcount + reclen > bufsize) {
1982 * Did we manage to fit anything in the buffer?
1990 if (flags & V_RDDIR_ENTFLAGS) {
1992 * Add extended flag entry:
1994 eodp->ed_ino = objnum;
1995 eodp->ed_reclen = reclen;
1996 /* NOTE: ed_off is the offset for the *next* entry */
1997 next = &(eodp->ed_off);
1998 eodp->ed_eflags = zap.za_normalization_conflict ?
1999 ED_CASE_CONFLICT : 0;
2000 (void) strncpy(eodp->ed_name, zap.za_name,
2001 EDIRENT_NAMELEN(reclen));
2002 eodp = (edirent_t *)((intptr_t)eodp + reclen);
2007 odp->d_ino = objnum;
2008 odp->d_reclen = reclen;
2009 /* NOTE: d_off is the offset for the *next* entry */
2010 next = &(odp->d_off);
2011 (void) strncpy(odp->d_name, zap.za_name,
2012 DIRENT64_NAMELEN(reclen));
2013 odp = (dirent64_t *)((intptr_t)odp + reclen);
2017 ASSERT(outcount <= bufsize);
2019 /* Prefetch znode */
2021 dmu_prefetch(os, objnum, 0, 0);
2024 * Move to the next entry, fill in the previous offset.
2026 if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) {
2027 zap_cursor_advance(&zc);
2028 offset = zap_cursor_serialize(&zc);
2034 zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */
2036 if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) {
2037 iovp->iov_base += outcount;
2038 iovp->iov_len -= outcount;
2039 uio->uio_resid -= outcount;
2040 } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) {
2042 * Reset the pointer.
2044 offset = uio->uio_loffset;
2048 zap_cursor_fini(&zc);
2049 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
2050 kmem_free(outbuf, bufsize);
2052 if (error == ENOENT)
2055 ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
2057 uio->uio_loffset = offset;
2062 ulong_t zfs_fsync_sync_cnt = 4;
2065 zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct)
2067 znode_t *zp = VTOZ(vp);
2068 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2071 * Regardless of whether this is required for standards conformance,
2072 * this is the logical behavior when fsync() is called on a file with
2073 * dirty pages. We use B_ASYNC since the ZIL transactions are already
2074 * going to be pushed out as part of the zil_commit().
2076 if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) &&
2077 (vp->v_type == VREG) && !(IS_SWAPVP(vp)))
2078 (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr, ct);
2080 (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt);
2084 zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id);
2091 * Get the requested file attributes and place them in the provided
2094 * IN: vp - vnode of file.
2095 * vap - va_mask identifies requested attributes.
2096 * If AT_XVATTR set, then optional attrs are requested
2097 * flags - ATTR_NOACLCHECK (CIFS server context)
2098 * cr - credentials of caller.
2099 * ct - caller context
2101 * OUT: vap - attribute values.
2103 * RETURN: 0 (always succeeds)
2107 zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
2108 caller_context_t *ct)
2110 znode_t *zp = VTOZ(vp);
2111 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2115 xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */
2116 xoptattr_t *xoap = NULL;
2117 boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
2123 mutex_enter(&zp->z_lock);
2126 * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES.
2127 * Also, if we are the owner don't bother, since owner should
2128 * always be allowed to read basic attributes of file.
2130 if (!(pzp->zp_flags & ZFS_ACL_TRIVIAL) &&
2131 (pzp->zp_uid != crgetuid(cr))) {
2132 if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0,
2134 mutex_exit(&zp->z_lock);
2141 * Return all attributes. It's cheaper to provide the answer
2142 * than to determine whether we were asked the question.
2145 vap->va_type = vp->v_type;
2146 vap->va_mode = pzp->zp_mode & MODEMASK;
2147 zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid);
2148 vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev;
2149 vap->va_nodeid = zp->z_id;
2150 if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp))
2151 links = pzp->zp_links + 1;
2153 links = pzp->zp_links;
2154 vap->va_nlink = MIN(links, UINT32_MAX); /* nlink_t limit! */
2155 vap->va_size = pzp->zp_size;
2156 vap->va_rdev = vp->v_rdev;
2157 vap->va_seq = zp->z_seq;
2160 * Add in any requested optional attributes and the create time.
2161 * Also set the corresponding bits in the returned attribute bitmap.
2163 if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) {
2164 if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) {
2166 ((pzp->zp_flags & ZFS_ARCHIVE) != 0);
2167 XVA_SET_RTN(xvap, XAT_ARCHIVE);
2170 if (XVA_ISSET_REQ(xvap, XAT_READONLY)) {
2171 xoap->xoa_readonly =
2172 ((pzp->zp_flags & ZFS_READONLY) != 0);
2173 XVA_SET_RTN(xvap, XAT_READONLY);
2176 if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) {
2178 ((pzp->zp_flags & ZFS_SYSTEM) != 0);
2179 XVA_SET_RTN(xvap, XAT_SYSTEM);
2182 if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) {
2184 ((pzp->zp_flags & ZFS_HIDDEN) != 0);
2185 XVA_SET_RTN(xvap, XAT_HIDDEN);
2188 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
2189 xoap->xoa_nounlink =
2190 ((pzp->zp_flags & ZFS_NOUNLINK) != 0);
2191 XVA_SET_RTN(xvap, XAT_NOUNLINK);
2194 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
2195 xoap->xoa_immutable =
2196 ((pzp->zp_flags & ZFS_IMMUTABLE) != 0);
2197 XVA_SET_RTN(xvap, XAT_IMMUTABLE);
2200 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
2201 xoap->xoa_appendonly =
2202 ((pzp->zp_flags & ZFS_APPENDONLY) != 0);
2203 XVA_SET_RTN(xvap, XAT_APPENDONLY);
2206 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
2208 ((pzp->zp_flags & ZFS_NODUMP) != 0);
2209 XVA_SET_RTN(xvap, XAT_NODUMP);
2212 if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) {
2214 ((pzp->zp_flags & ZFS_OPAQUE) != 0);
2215 XVA_SET_RTN(xvap, XAT_OPAQUE);
2218 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
2219 xoap->xoa_av_quarantined =
2220 ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0);
2221 XVA_SET_RTN(xvap, XAT_AV_QUARANTINED);
2224 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
2225 xoap->xoa_av_modified =
2226 ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0);
2227 XVA_SET_RTN(xvap, XAT_AV_MODIFIED);
2230 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) &&
2231 vp->v_type == VREG &&
2232 (pzp->zp_flags & ZFS_BONUS_SCANSTAMP)) {
2234 dmu_object_info_t doi;
2237 * Only VREG files have anti-virus scanstamps, so we
2238 * won't conflict with symlinks in the bonus buffer.
2240 dmu_object_info_from_db(zp->z_dbuf, &doi);
2241 len = sizeof (xoap->xoa_av_scanstamp) +
2242 sizeof (znode_phys_t);
2243 if (len <= doi.doi_bonus_size) {
2245 * pzp points to the start of the
2246 * znode_phys_t. pzp + 1 points to the
2247 * first byte after the znode_phys_t.
2249 (void) memcpy(xoap->xoa_av_scanstamp,
2251 sizeof (xoap->xoa_av_scanstamp));
2252 XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP);
2256 if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) {
2257 ZFS_TIME_DECODE(&xoap->xoa_createtime, pzp->zp_crtime);
2258 XVA_SET_RTN(xvap, XAT_CREATETIME);
2262 ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime);
2263 ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime);
2264 ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime);
2266 mutex_exit(&zp->z_lock);
2268 dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks);
2270 if (zp->z_blksz == 0) {
2272 * Block size hasn't been set; suggest maximal I/O transfers.
2274 vap->va_blksize = zfsvfs->z_max_blksz;
2282 * Set the file attributes to the values contained in the
2285 * IN: vp - vnode of file to be modified.
2286 * vap - new attribute values.
2287 * If AT_XVATTR set, then optional attrs are being set
2288 * flags - ATTR_UTIME set if non-default time values provided.
2289 * - ATTR_NOACLCHECK (CIFS context only).
2290 * cr - credentials of caller.
2291 * ct - caller context
2293 * RETURN: 0 if success
2294 * error code if failure
2297 * vp - ctime updated, mtime updated if size changed.
2301 zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
2302 caller_context_t *ct)
2304 znode_t *zp = VTOZ(vp);
2306 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
2311 uint_t mask = vap->va_mask;
2316 int need_policy = FALSE;
2318 zfs_fuid_info_t *fuidp = NULL;
2319 xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */
2321 zfs_acl_t *aclp = NULL;
2322 boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
2327 if (mask & AT_NOSET)
2334 zilog = zfsvfs->z_log;
2337 * Make sure that if we have ephemeral uid/gid or xvattr specified
2338 * that file system is at proper version level
2341 if (zfsvfs->z_use_fuids == B_FALSE &&
2342 (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) ||
2343 ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) ||
2344 (mask & AT_XVATTR))) {
2349 if (mask & AT_SIZE && vp->v_type == VDIR) {
2354 if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) {
2360 * If this is an xvattr_t, then get a pointer to the structure of
2361 * optional attributes. If this is NULL, then we have a vattr_t.
2363 xoap = xva_getxoptattr(xvap);
2365 xva_init(&tmpxvattr);
2368 * Immutable files can only alter immutable bit and atime
2370 if ((pzp->zp_flags & ZFS_IMMUTABLE) &&
2371 ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) ||
2372 ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) {
2377 if ((mask & AT_SIZE) && (pzp->zp_flags & ZFS_READONLY)) {
2383 * Verify timestamps doesn't overflow 32 bits.
2384 * ZFS can handle large timestamps, but 32bit syscalls can't
2385 * handle times greater than 2039. This check should be removed
2386 * once large timestamps are fully supported.
2388 if (mask & (AT_ATIME | AT_MTIME)) {
2389 if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) ||
2390 ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) {
2399 if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) {
2405 * First validate permissions
2408 if (mask & AT_SIZE) {
2409 err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr);
2415 * XXX - Note, we are not providing any open
2416 * mode flags here (like FNDELAY), so we may
2417 * block if there are locks present... this
2418 * should be addressed in openat().
2420 /* XXX - would it be OK to generate a log record here? */
2421 err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE);
2428 if (mask & (AT_ATIME|AT_MTIME) ||
2429 ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) ||
2430 XVA_ISSET_REQ(xvap, XAT_READONLY) ||
2431 XVA_ISSET_REQ(xvap, XAT_ARCHIVE) ||
2432 XVA_ISSET_REQ(xvap, XAT_CREATETIME) ||
2433 XVA_ISSET_REQ(xvap, XAT_SYSTEM))))
2434 need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0,
2437 if (mask & (AT_UID|AT_GID)) {
2438 int idmask = (mask & (AT_UID|AT_GID));
2443 * NOTE: even if a new mode is being set,
2444 * we may clear S_ISUID/S_ISGID bits.
2447 if (!(mask & AT_MODE))
2448 vap->va_mode = pzp->zp_mode;
2451 * Take ownership or chgrp to group we are a member of
2454 take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr));
2455 take_group = (mask & AT_GID) &&
2456 zfs_groupmember(zfsvfs, vap->va_gid, cr);
2459 * If both AT_UID and AT_GID are set then take_owner and
2460 * take_group must both be set in order to allow taking
2463 * Otherwise, send the check through secpolicy_vnode_setattr()
2467 if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) ||
2468 ((idmask == AT_UID) && take_owner) ||
2469 ((idmask == AT_GID) && take_group)) {
2470 if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0,
2471 skipaclchk, cr) == 0) {
2473 * Remove setuid/setgid for non-privileged users
2475 secpolicy_setid_clear(vap, cr);
2476 trim_mask = (mask & (AT_UID|AT_GID));
2485 mutex_enter(&zp->z_lock);
2486 oldva.va_mode = pzp->zp_mode;
2487 zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid);
2488 if (mask & AT_XVATTR) {
2490 * Update xvattr mask to include only those attributes
2491 * that are actually changing.
2493 * the bits will be restored prior to actually setting
2494 * the attributes so the caller thinks they were set.
2496 if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) {
2497 if (xoap->xoa_appendonly !=
2498 ((pzp->zp_flags & ZFS_APPENDONLY) != 0)) {
2501 XVA_CLR_REQ(xvap, XAT_APPENDONLY);
2502 XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY);
2506 if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) {
2507 if (xoap->xoa_nounlink !=
2508 ((pzp->zp_flags & ZFS_NOUNLINK) != 0)) {
2511 XVA_CLR_REQ(xvap, XAT_NOUNLINK);
2512 XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK);
2516 if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) {
2517 if (xoap->xoa_immutable !=
2518 ((pzp->zp_flags & ZFS_IMMUTABLE) != 0)) {
2521 XVA_CLR_REQ(xvap, XAT_IMMUTABLE);
2522 XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE);
2526 if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) {
2527 if (xoap->xoa_nodump !=
2528 ((pzp->zp_flags & ZFS_NODUMP) != 0)) {
2531 XVA_CLR_REQ(xvap, XAT_NODUMP);
2532 XVA_SET_REQ(&tmpxvattr, XAT_NODUMP);
2536 if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) {
2537 if (xoap->xoa_av_modified !=
2538 ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0)) {
2541 XVA_CLR_REQ(xvap, XAT_AV_MODIFIED);
2542 XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED);
2546 if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) {
2547 if ((vp->v_type != VREG &&
2548 xoap->xoa_av_quarantined) ||
2549 xoap->xoa_av_quarantined !=
2550 ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0)) {
2553 XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED);
2554 XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED);
2558 if (need_policy == FALSE &&
2559 (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) ||
2560 XVA_ISSET_REQ(xvap, XAT_OPAQUE))) {
2565 mutex_exit(&zp->z_lock);
2567 if (mask & AT_MODE) {
2568 if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) {
2569 err = secpolicy_setid_setsticky_clear(vp, vap,
2575 trim_mask |= AT_MODE;
2583 * If trim_mask is set then take ownership
2584 * has been granted or write_acl is present and user
2585 * has the ability to modify mode. In that case remove
2586 * UID|GID and or MODE from mask so that
2587 * secpolicy_vnode_setattr() doesn't revoke it.
2591 saved_mask = vap->va_mask;
2592 vap->va_mask &= ~trim_mask;
2594 err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags,
2595 (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp);
2602 vap->va_mask |= saved_mask;
2606 * secpolicy_vnode_setattr, or take ownership may have
2609 mask = vap->va_mask;
2611 tx = dmu_tx_create(zfsvfs->z_os);
2612 dmu_tx_hold_bonus(tx, zp->z_id);
2613 if (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) ||
2614 ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid))) {
2615 if (zfsvfs->z_fuid_obj == 0) {
2616 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
2617 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
2618 FUID_SIZE_ESTIMATE(zfsvfs));
2619 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL);
2621 dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj);
2622 dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0,
2623 FUID_SIZE_ESTIMATE(zfsvfs));
2627 if (mask & AT_MODE) {
2628 uint64_t pmode = pzp->zp_mode;
2630 new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT);
2632 if (err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)) {
2637 if (pzp->zp_acl.z_acl_extern_obj) {
2638 /* Are we upgrading ACL from old V0 format to new V1 */
2639 if (zfsvfs->z_version <= ZPL_VERSION_FUID &&
2640 pzp->zp_acl.z_acl_version ==
2641 ZFS_ACL_VERSION_INITIAL) {
2642 dmu_tx_hold_free(tx,
2643 pzp->zp_acl.z_acl_extern_obj, 0,
2645 dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
2646 0, aclp->z_acl_bytes);
2648 dmu_tx_hold_write(tx,
2649 pzp->zp_acl.z_acl_extern_obj, 0,
2652 } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) {
2653 dmu_tx_hold_write(tx, DMU_NEW_OBJECT,
2654 0, aclp->z_acl_bytes);
2658 if ((mask & (AT_UID | AT_GID)) && pzp->zp_xattr != 0) {
2659 err = zfs_zget(zp->z_zfsvfs, pzp->zp_xattr, &attrzp);
2667 dmu_tx_hold_bonus(tx, attrzp->z_id);
2670 err = dmu_tx_assign(tx, TXG_NOWAIT);
2673 VN_RELE(ZTOV(attrzp));
2680 if (err == ERESTART) {
2690 dmu_buf_will_dirty(zp->z_dbuf, tx);
2693 * Set each attribute requested.
2694 * We group settings according to the locks they need to acquire.
2696 * Note: you cannot set ctime directly, although it will be
2697 * updated as a side-effect of calling this function.
2700 mutex_enter(&zp->z_lock);
2702 if (mask & AT_MODE) {
2703 mutex_enter(&zp->z_acl_lock);
2704 zp->z_phys->zp_mode = new_mode;
2705 err = zfs_aclset_common(zp, aclp, cr, &fuidp, tx);
2706 ASSERT3U(err, ==, 0);
2707 mutex_exit(&zp->z_acl_lock);
2711 mutex_enter(&attrzp->z_lock);
2713 if (mask & AT_UID) {
2714 pzp->zp_uid = zfs_fuid_create(zfsvfs,
2715 vap->va_uid, cr, ZFS_OWNER, tx, &fuidp);
2717 attrzp->z_phys->zp_uid = zfs_fuid_create(zfsvfs,
2718 vap->va_uid, cr, ZFS_OWNER, tx, &fuidp);
2722 if (mask & AT_GID) {
2723 pzp->zp_gid = zfs_fuid_create(zfsvfs, vap->va_gid,
2724 cr, ZFS_GROUP, tx, &fuidp);
2726 attrzp->z_phys->zp_gid = zfs_fuid_create(zfsvfs,
2727 vap->va_gid, cr, ZFS_GROUP, tx, &fuidp);
2734 mutex_exit(&attrzp->z_lock);
2736 if (mask & AT_ATIME)
2737 ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime);
2739 if (mask & AT_MTIME)
2740 ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime);
2742 /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */
2744 zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx);
2746 zfs_time_stamper_locked(zp, STATE_CHANGED, tx);
2748 * Do this after setting timestamps to prevent timestamp
2749 * update from toggling bit
2752 if (xoap && (mask & AT_XVATTR)) {
2755 * restore trimmed off masks
2756 * so that return masks can be set for caller.
2759 if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) {
2760 XVA_SET_REQ(xvap, XAT_APPENDONLY);
2762 if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) {
2763 XVA_SET_REQ(xvap, XAT_NOUNLINK);
2765 if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) {
2766 XVA_SET_REQ(xvap, XAT_IMMUTABLE);
2768 if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) {
2769 XVA_SET_REQ(xvap, XAT_NODUMP);
2771 if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) {
2772 XVA_SET_REQ(xvap, XAT_AV_MODIFIED);
2774 if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) {
2775 XVA_SET_REQ(xvap, XAT_AV_QUARANTINED);
2778 if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) {
2780 dmu_object_info_t doi;
2782 ASSERT(vp->v_type == VREG);
2784 /* Grow the bonus buffer if necessary. */
2785 dmu_object_info_from_db(zp->z_dbuf, &doi);
2786 len = sizeof (xoap->xoa_av_scanstamp) +
2787 sizeof (znode_phys_t);
2788 if (len > doi.doi_bonus_size)
2789 VERIFY(dmu_set_bonus(zp->z_dbuf, len, tx) == 0);
2791 zfs_xvattr_set(zp, xvap);
2795 zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp);
2798 zfs_fuid_info_free(fuidp);
2799 mutex_exit(&zp->z_lock);
2802 VN_RELE(ZTOV(attrzp));
2810 typedef struct zfs_zlock {
2811 krwlock_t *zl_rwlock; /* lock we acquired */
2812 znode_t *zl_znode; /* znode we held */
2813 struct zfs_zlock *zl_next; /* next in list */
2817 * Drop locks and release vnodes that were held by zfs_rename_lock().
2820 zfs_rename_unlock(zfs_zlock_t **zlpp)
2824 while ((zl = *zlpp) != NULL) {
2825 if (zl->zl_znode != NULL)
2826 VN_RELE(ZTOV(zl->zl_znode));
2827 rw_exit(zl->zl_rwlock);
2828 *zlpp = zl->zl_next;
2829 kmem_free(zl, sizeof (*zl));
2834 * Search back through the directory tree, using the ".." entries.
2835 * Lock each directory in the chain to prevent concurrent renames.
2836 * Fail any attempt to move a directory into one of its own descendants.
2837 * XXX - z_parent_lock can overlap with map or grow locks
2840 zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp)
2844 uint64_t rootid = zp->z_zfsvfs->z_root;
2845 uint64_t *oidp = &zp->z_id;
2846 krwlock_t *rwlp = &szp->z_parent_lock;
2847 krw_t rw = RW_WRITER;
2850 * First pass write-locks szp and compares to zp->z_id.
2851 * Later passes read-lock zp and compare to zp->z_parent.
2854 if (!rw_tryenter(rwlp, rw)) {
2856 * Another thread is renaming in this path.
2857 * Note that if we are a WRITER, we don't have any
2858 * parent_locks held yet.
2860 if (rw == RW_READER && zp->z_id > szp->z_id) {
2862 * Drop our locks and restart
2864 zfs_rename_unlock(&zl);
2868 rwlp = &szp->z_parent_lock;
2873 * Wait for other thread to drop its locks
2879 zl = kmem_alloc(sizeof (*zl), KM_SLEEP);
2880 zl->zl_rwlock = rwlp;
2881 zl->zl_znode = NULL;
2882 zl->zl_next = *zlpp;
2885 if (*oidp == szp->z_id) /* We're a descendant of szp */
2888 if (*oidp == rootid) /* We've hit the top */
2891 if (rw == RW_READER) { /* i.e. not the first pass */
2892 int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp);
2897 oidp = &zp->z_phys->zp_parent;
2898 rwlp = &zp->z_parent_lock;
2901 } while (zp->z_id != sdzp->z_id);
2907 * Move an entry from the provided source directory to the target
2908 * directory. Change the entry name as indicated.
2910 * IN: sdvp - Source directory containing the "old entry".
2911 * snm - Old entry name.
2912 * tdvp - Target directory to contain the "new entry".
2913 * tnm - New entry name.
2914 * cr - credentials of caller.
2915 * ct - caller context
2916 * flags - case flags
2918 * RETURN: 0 if success
2919 * error code if failure
2922 * sdvp,tdvp - ctime|mtime updated
2926 zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr,
2927 caller_context_t *ct, int flags)
2929 znode_t *tdzp, *szp, *tzp;
2930 znode_t *sdzp = VTOZ(sdvp);
2931 zfsvfs_t *zfsvfs = sdzp->z_zfsvfs;
2934 zfs_dirlock_t *sdl, *tdl;
2937 int cmp, serr, terr;
2942 ZFS_VERIFY_ZP(sdzp);
2943 zilog = zfsvfs->z_log;
2946 * Make sure we have the real vp for the target directory.
2948 if (VOP_REALVP(tdvp, &realvp, ct) == 0)
2951 if (tdvp->v_vfsp != sdvp->v_vfsp) {
2957 ZFS_VERIFY_ZP(tdzp);
2958 if (zfsvfs->z_utf8 && u8_validate(tnm,
2959 strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
2964 if (flags & FIGNORECASE)
2973 * This is to prevent the creation of links into attribute space
2974 * by renaming a linked file into/outof an attribute directory.
2975 * See the comment in zfs_link() for why this is considered bad.
2977 if ((tdzp->z_phys->zp_flags & ZFS_XATTR) !=
2978 (sdzp->z_phys->zp_flags & ZFS_XATTR)) {
2984 * Lock source and target directory entries. To prevent deadlock,
2985 * a lock ordering must be defined. We lock the directory with
2986 * the smallest object id first, or if it's a tie, the one with
2987 * the lexically first name.
2989 if (sdzp->z_id < tdzp->z_id) {
2991 } else if (sdzp->z_id > tdzp->z_id) {
2995 * First compare the two name arguments without
2996 * considering any case folding.
2998 int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER);
3000 cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error);
3001 ASSERT(error == 0 || !zfsvfs->z_utf8);
3004 * POSIX: "If the old argument and the new argument
3005 * both refer to links to the same existing file,
3006 * the rename() function shall return successfully
3007 * and perform no other action."
3013 * If the file system is case-folding, then we may
3014 * have some more checking to do. A case-folding file
3015 * system is either supporting mixed case sensitivity
3016 * access or is completely case-insensitive. Note
3017 * that the file system is always case preserving.
3019 * In mixed sensitivity mode case sensitive behavior
3020 * is the default. FIGNORECASE must be used to
3021 * explicitly request case insensitive behavior.
3023 * If the source and target names provided differ only
3024 * by case (e.g., a request to rename 'tim' to 'Tim'),
3025 * we will treat this as a special case in the
3026 * case-insensitive mode: as long as the source name
3027 * is an exact match, we will allow this to proceed as
3028 * a name-change request.
3030 if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE ||
3031 (zfsvfs->z_case == ZFS_CASE_MIXED &&
3032 flags & FIGNORECASE)) &&
3033 u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST,
3036 * case preserving rename request, require exact
3045 serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp,
3046 ZEXISTS | zflg, NULL, NULL);
3047 terr = zfs_dirent_lock(&tdl,
3048 tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL);
3050 terr = zfs_dirent_lock(&tdl,
3051 tdzp, tnm, &tzp, zflg, NULL, NULL);
3052 serr = zfs_dirent_lock(&sdl,
3053 sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg,
3059 * Source entry invalid or not there.
3062 zfs_dirent_unlock(tdl);
3066 if (strcmp(snm, "..") == 0)
3072 zfs_dirent_unlock(sdl);
3074 if (strcmp(tnm, "..") == 0)
3081 * Must have write access at the source to remove the old entry
3082 * and write access at the target to create the new entry.
3083 * Note that if target and source are the same, this can be
3084 * done in a single check.
3087 if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr))
3090 if (ZTOV(szp)->v_type == VDIR) {
3092 * Check to make sure rename is valid.
3093 * Can't do a move like this: /usr/a/b to /usr/a/b/c/d
3095 if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl))
3100 * Does target exist?
3104 * Source and target must be the same type.
3106 if (ZTOV(szp)->v_type == VDIR) {
3107 if (ZTOV(tzp)->v_type != VDIR) {
3112 if (ZTOV(tzp)->v_type == VDIR) {
3118 * POSIX dictates that when the source and target
3119 * entries refer to the same file object, rename
3120 * must do nothing and exit without error.
3122 if (szp->z_id == tzp->z_id) {
3128 vnevent_rename_src(ZTOV(szp), sdvp, snm, ct);
3130 vnevent_rename_dest(ZTOV(tzp), tdvp, tnm, ct);
3133 * notify the target directory if it is not the same
3134 * as source directory.
3137 vnevent_rename_dest_dir(tdvp, ct);
3140 tx = dmu_tx_create(zfsvfs->z_os);
3141 dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */
3142 dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */
3143 dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm);
3144 dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm);
3146 dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */
3148 dmu_tx_hold_bonus(tx, tzp->z_id); /* parent changes */
3149 dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL);
3150 error = dmu_tx_assign(tx, TXG_NOWAIT);
3153 zfs_rename_unlock(&zl);
3154 zfs_dirent_unlock(sdl);
3155 zfs_dirent_unlock(tdl);
3159 if (error == ERESTART) {
3169 if (tzp) /* Attempt to remove the existing target */
3170 error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL);
3173 error = zfs_link_create(tdl, szp, tx, ZRENAMING);
3175 szp->z_phys->zp_flags |= ZFS_AV_MODIFIED;
3177 error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL);
3180 zfs_log_rename(zilog, tx,
3181 TX_RENAME | (flags & FIGNORECASE ? TX_CI : 0),
3182 sdzp, sdl->dl_name, tdzp, tdl->dl_name, szp);
3184 /* Update path information for the target vnode */
3185 vn_renamepath(tdvp, ZTOV(szp), tnm, strlen(tnm));
3192 zfs_rename_unlock(&zl);
3194 zfs_dirent_unlock(sdl);
3195 zfs_dirent_unlock(tdl);
3206 * Insert the indicated symbolic reference entry into the directory.
3208 * IN: dvp - Directory to contain new symbolic link.
3209 * link - Name for new symlink entry.
3210 * vap - Attributes of new entry.
3211 * target - Target path of new symlink.
3212 * cr - credentials of caller.
3213 * ct - caller context
3214 * flags - case flags
3216 * RETURN: 0 if success
3217 * error code if failure
3220 * dvp - ctime|mtime updated
3224 zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr,
3225 caller_context_t *ct, int flags)
3227 znode_t *zp, *dzp = VTOZ(dvp);
3230 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
3232 int len = strlen(link);
3235 zfs_fuid_info_t *fuidp = NULL;
3237 ASSERT(vap->va_type == VLNK);
3241 zilog = zfsvfs->z_log;
3243 if (zfsvfs->z_utf8 && u8_validate(name, strlen(name),
3244 NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
3248 if (flags & FIGNORECASE)
3251 if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) {
3256 if (len > MAXPATHLEN) {
3258 return (ENAMETOOLONG);
3262 * Attempt to lock directory; fail if entry already exists.
3264 error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL);
3270 tx = dmu_tx_create(zfsvfs->z_os);
3271 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len));
3272 dmu_tx_hold_bonus(tx, dzp->z_id);
3273 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
3274 if (dzp->z_phys->zp_flags & ZFS_INHERIT_ACE)
3275 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE);
3276 if (IS_EPHEMERAL(crgetuid(cr)) || IS_EPHEMERAL(crgetgid(cr))) {
3277 if (zfsvfs->z_fuid_obj == 0) {
3278 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
3279 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
3280 FUID_SIZE_ESTIMATE(zfsvfs));
3281 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL);
3283 dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj);
3284 dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0,
3285 FUID_SIZE_ESTIMATE(zfsvfs));
3288 error = dmu_tx_assign(tx, TXG_NOWAIT);
3290 zfs_dirent_unlock(dl);
3291 if (error == ERESTART) {
3301 dmu_buf_will_dirty(dzp->z_dbuf, tx);
3304 * Create a new object for the symlink.
3305 * Put the link content into bonus buffer if it will fit;
3306 * otherwise, store it just like any other file data.
3308 if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) {
3309 zfs_mknode(dzp, vap, tx, cr, 0, &zp, len, NULL, &fuidp);
3311 bcopy(link, zp->z_phys + 1, len);
3315 zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, NULL, &fuidp);
3317 * Nothing can access the znode yet so no locking needed
3318 * for growing the znode's blocksize.
3320 zfs_grow_blocksize(zp, len, tx);
3322 VERIFY(0 == dmu_buf_hold(zfsvfs->z_os,
3323 zp->z_id, 0, FTAG, &dbp));
3324 dmu_buf_will_dirty(dbp, tx);
3326 ASSERT3U(len, <=, dbp->db_size);
3327 bcopy(link, dbp->db_data, len);
3328 dmu_buf_rele(dbp, FTAG);
3330 zp->z_phys->zp_size = len;
3333 * Insert the new object into the directory.
3335 (void) zfs_link_create(dl, zp, tx, ZNEW);
3338 uint64_t txtype = TX_SYMLINK;
3339 if (flags & FIGNORECASE)
3341 zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link);
3344 zfs_fuid_info_free(fuidp);
3348 zfs_dirent_unlock(dl);
3357 * Return, in the buffer contained in the provided uio structure,
3358 * the symbolic path referred to by vp.
3360 * IN: vp - vnode of symbolic link.
3361 * uoip - structure to contain the link path.
3362 * cr - credentials of caller.
3363 * ct - caller context
3365 * OUT: uio - structure to contain the link path.
3367 * RETURN: 0 if success
3368 * error code if failure
3371 * vp - atime updated
3375 zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct)
3377 znode_t *zp = VTOZ(vp);
3378 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
3385 bufsz = (size_t)zp->z_phys->zp_size;
3386 if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) {
3387 error = uiomove(zp->z_phys + 1,
3388 MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
3391 error = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0, FTAG, &dbp);
3396 error = uiomove(dbp->db_data,
3397 MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio);
3398 dmu_buf_rele(dbp, FTAG);
3401 ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
3407 * Insert a new entry into directory tdvp referencing svp.
3409 * IN: tdvp - Directory to contain new entry.
3410 * svp - vnode of new entry.
3411 * name - name of new entry.
3412 * cr - credentials of caller.
3413 * ct - caller context
3415 * RETURN: 0 if success
3416 * error code if failure
3419 * tdvp - ctime|mtime updated
3420 * svp - ctime updated
3424 zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr,
3425 caller_context_t *ct, int flags)
3427 znode_t *dzp = VTOZ(tdvp);
3429 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
3438 ASSERT(tdvp->v_type == VDIR);
3442 zilog = zfsvfs->z_log;
3444 if (VOP_REALVP(svp, &realvp, ct) == 0)
3447 if (svp->v_vfsp != tdvp->v_vfsp) {
3454 if (zfsvfs->z_utf8 && u8_validate(name,
3455 strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) {
3459 if (flags & FIGNORECASE)
3464 * We do not support links between attributes and non-attributes
3465 * because of the potential security risk of creating links
3466 * into "normal" file space in order to circumvent restrictions
3467 * imposed in attribute space.
3469 if ((szp->z_phys->zp_flags & ZFS_XATTR) !=
3470 (dzp->z_phys->zp_flags & ZFS_XATTR)) {
3476 * POSIX dictates that we return EPERM here.
3477 * Better choices include ENOTSUP or EISDIR.
3479 if (svp->v_type == VDIR) {
3484 owner = zfs_fuid_map_id(zfsvfs, szp->z_phys->zp_uid, cr, ZFS_OWNER);
3485 if (owner != crgetuid(cr) &&
3486 secpolicy_basic_link(cr) != 0) {
3491 if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) {
3497 * Attempt to lock directory; fail if entry already exists.
3499 error = zfs_dirent_lock(&dl, dzp, name, &tzp, zf, NULL, NULL);
3505 tx = dmu_tx_create(zfsvfs->z_os);
3506 dmu_tx_hold_bonus(tx, szp->z_id);
3507 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name);
3508 error = dmu_tx_assign(tx, TXG_NOWAIT);
3510 zfs_dirent_unlock(dl);
3511 if (error == ERESTART) {
3521 error = zfs_link_create(dl, szp, tx, 0);
3524 uint64_t txtype = TX_LINK;
3525 if (flags & FIGNORECASE)
3527 zfs_log_link(zilog, tx, txtype, dzp, szp, name);
3532 zfs_dirent_unlock(dl);
3535 vnevent_link(svp, ct);
3543 * zfs_null_putapage() is used when the file system has been force
3544 * unmounted. It just drops the pages.
3548 zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp,
3549 size_t *lenp, int flags, cred_t *cr)
3551 pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR);
3556 * Push a page out to disk, klustering if possible.
3558 * IN: vp - file to push page to.
3559 * pp - page to push.
3560 * flags - additional flags.
3561 * cr - credentials of caller.
3563 * OUT: offp - start of range pushed.
3564 * lenp - len of range pushed.
3566 * RETURN: 0 if success
3567 * error code if failure
3569 * NOTE: callers must have locked the page to be pushed. On
3570 * exit, the page (and all other pages in the kluster) must be
3575 zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp,
3576 size_t *lenp, int flags, cred_t *cr)
3578 znode_t *zp = VTOZ(vp);
3579 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
3581 u_offset_t off, koff;
3586 filesz = zp->z_phys->zp_size;
3590 * If our blocksize is bigger than the page size, try to kluster
3591 * multiple pages so that we write a full block (thus avoiding
3592 * a read-modify-write).
3594 if (off < filesz && zp->z_blksz > PAGESIZE) {
3595 klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE);
3596 koff = ISP2(klen) ? P2ALIGN(off, (u_offset_t)klen) : 0;
3597 ASSERT(koff <= filesz);
3598 if (koff + klen > filesz)
3599 klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE);
3600 pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags);
3602 ASSERT3U(btop(len), ==, btopr(len));
3605 * Can't push pages past end-of-file.
3607 if (off >= filesz) {
3608 /* ignore all pages */
3611 } else if (off + len > filesz) {
3612 int npages = btopr(filesz - off);
3615 page_list_break(&pp, &trunc, npages);
3616 /* ignore pages past end of file */
3618 pvn_write_done(trunc, flags);
3622 tx = dmu_tx_create(zfsvfs->z_os);
3623 dmu_tx_hold_write(tx, zp->z_id, off, len);
3624 dmu_tx_hold_bonus(tx, zp->z_id);
3625 err = dmu_tx_assign(tx, TXG_NOWAIT);
3627 if (err == ERESTART) {
3636 if (zp->z_blksz <= PAGESIZE) {
3637 caddr_t va = zfs_map_page(pp, S_READ);
3638 ASSERT3U(len, <=, PAGESIZE);
3639 dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx);
3640 zfs_unmap_page(pp, va);
3642 err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx);
3646 zfs_time_stamper(zp, CONTENT_MODIFIED, tx);
3647 zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, len, 0);
3652 pvn_write_done(pp, (err ? B_ERROR : 0) | flags);
3662 * Copy the portion of the file indicated from pages into the file.
3663 * The pages are stored in a page list attached to the files vnode.
3665 * IN: vp - vnode of file to push page data to.
3666 * off - position in file to put data.
3667 * len - amount of data to write.
3668 * flags - flags to control the operation.
3669 * cr - credentials of caller.
3670 * ct - caller context.
3672 * RETURN: 0 if success
3673 * error code if failure
3676 * vp - ctime|mtime updated
3680 zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr,
3681 caller_context_t *ct)
3683 znode_t *zp = VTOZ(vp);
3684 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
3696 * Align this request to the file block size in case we kluster.
3697 * XXX - this can result in pretty aggresive locking, which can
3698 * impact simultanious read/write access. One option might be
3699 * to break up long requests (len == 0) into block-by-block
3700 * operations to get narrower locking.
3702 blksz = zp->z_blksz;
3704 io_off = P2ALIGN_TYPED(off, blksz, u_offset_t);
3707 if (len > 0 && ISP2(blksz))
3708 io_len = P2ROUNDUP_TYPED(len + (io_off - off), blksz, size_t);
3714 * Search the entire vp list for pages >= io_off.
3716 rl = zfs_range_lock(zp, io_off, UINT64_MAX, RL_WRITER);
3717 error = pvn_vplist_dirty(vp, io_off, zfs_putapage, flags, cr);
3720 rl = zfs_range_lock(zp, io_off, io_len, RL_WRITER);
3722 if (off > zp->z_phys->zp_size) {
3723 /* past end of file */
3724 zfs_range_unlock(rl);
3729 len = MIN(io_len, P2ROUNDUP(zp->z_phys->zp_size, PAGESIZE) - io_off);
3731 for (off = io_off; io_off < off + len; io_off += io_len) {
3732 if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) {
3733 pp = page_lookup(vp, io_off,
3734 (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED);
3736 pp = page_lookup_nowait(vp, io_off,
3737 (flags & B_FREE) ? SE_EXCL : SE_SHARED);
3740 if (pp != NULL && pvn_getdirty(pp, flags)) {
3744 * Found a dirty page to push
3746 err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr);
3754 zfs_range_unlock(rl);
3755 if ((flags & B_ASYNC) == 0)
3756 zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id);
3763 zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
3765 znode_t *zp = VTOZ(vp);
3766 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
3769 rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER);
3770 if (zp->z_dbuf == NULL) {
3772 * The fs has been unmounted, or we did a
3773 * suspend/resume and this file no longer exists.
3775 if (vn_has_cached_data(vp)) {
3776 (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage,
3780 mutex_enter(&zp->z_lock);
3781 vp->v_count = 0; /* count arrives as 1 */
3782 mutex_exit(&zp->z_lock);
3783 rw_exit(&zfsvfs->z_teardown_inactive_lock);
3789 * Attempt to push any data in the page cache. If this fails
3790 * we will get kicked out later in zfs_zinactive().
3792 if (vn_has_cached_data(vp)) {
3793 (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC,
3797 if (zp->z_atime_dirty && zp->z_unlinked == 0) {
3798 dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os);
3800 dmu_tx_hold_bonus(tx, zp->z_id);
3801 error = dmu_tx_assign(tx, TXG_WAIT);
3805 dmu_buf_will_dirty(zp->z_dbuf, tx);
3806 mutex_enter(&zp->z_lock);
3807 zp->z_atime_dirty = 0;
3808 mutex_exit(&zp->z_lock);
3814 rw_exit(&zfsvfs->z_teardown_inactive_lock);
3818 * Bounds-check the seek operation.
3820 * IN: vp - vnode seeking within
3821 * ooff - old file offset
3822 * noffp - pointer to new file offset
3823 * ct - caller context
3825 * RETURN: 0 if success
3826 * EINVAL if new offset invalid
3830 zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp,
3831 caller_context_t *ct)
3833 if (vp->v_type == VDIR)
3835 return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0);
3839 * Pre-filter the generic locking function to trap attempts to place
3840 * a mandatory lock on a memory mapped file.
3843 zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset,
3844 flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct)
3846 znode_t *zp = VTOZ(vp);
3847 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
3854 * We are following the UFS semantics with respect to mapcnt
3855 * here: If we see that the file is mapped already, then we will
3856 * return an error, but we don't worry about races between this
3857 * function and zfs_map().
3859 if (zp->z_mapcnt > 0 && MANDMODE((mode_t)zp->z_phys->zp_mode)) {
3863 error = fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct);
3869 * If we can't find a page in the cache, we will create a new page
3870 * and fill it with file data. For efficiency, we may try to fill
3871 * multiple pages at once (klustering) to fill up the supplied page
3875 zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg,
3876 caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw)
3878 znode_t *zp = VTOZ(vp);
3879 page_t *pp, *cur_pp;
3880 objset_t *os = zp->z_zfsvfs->z_os;
3881 u_offset_t io_off, total;
3885 if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) {
3887 * We only have a single page, don't bother klustering
3891 pp = page_create_va(vp, io_off, io_len, PG_WAIT, seg, addr);
3894 * Try to find enough pages to fill the page list
3896 pp = pvn_read_kluster(vp, off, seg, addr, &io_off,
3897 &io_len, off, plsz, 0);
3901 * The page already exists, nothing to do here.
3908 * Fill the pages in the kluster.
3911 for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) {
3914 ASSERT3U(io_off, ==, cur_pp->p_offset);
3915 va = zfs_map_page(cur_pp, S_WRITE);
3916 err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va);
3917 zfs_unmap_page(cur_pp, va);
3919 /* On error, toss the entire kluster */
3920 pvn_read_done(pp, B_ERROR);
3921 /* convert checksum errors into IO errors */
3926 cur_pp = cur_pp->p_next;
3930 * Fill in the page list array from the kluster starting
3931 * from the desired offset `off'.
3932 * NOTE: the page list will always be null terminated.
3934 pvn_plist_init(pp, pl, plsz, off, io_len, rw);
3935 ASSERT(pl == NULL || (*pl)->p_offset == off);
3941 * Return pointers to the pages for the file region [off, off + len]
3942 * in the pl array. If plsz is greater than len, this function may
3943 * also return page pointers from after the specified region
3944 * (i.e. the region [off, off + plsz]). These additional pages are
3945 * only returned if they are already in the cache, or were created as
3946 * part of a klustered read.
3948 * IN: vp - vnode of file to get data from.
3949 * off - position in file to get data from.
3950 * len - amount of data to retrieve.
3951 * plsz - length of provided page list.
3952 * seg - segment to obtain pages for.
3953 * addr - virtual address of fault.
3954 * rw - mode of created pages.
3955 * cr - credentials of caller.
3956 * ct - caller context.
3958 * OUT: protp - protection mode of created pages.
3959 * pl - list of pages created.
3961 * RETURN: 0 if success
3962 * error code if failure
3965 * vp - atime updated
3969 zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp,
3970 page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr,
3971 enum seg_rw rw, cred_t *cr, caller_context_t *ct)
3973 znode_t *zp = VTOZ(vp);
3974 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
3978 /* we do our own caching, faultahead is unnecessary */
3981 else if (len > plsz)
3984 len = P2ROUNDUP(len, PAGESIZE);
3985 ASSERT(plsz >= len);
3994 * Loop through the requested range [off, off + len] looking
3995 * for pages. If we don't find a page, we will need to create
3996 * a new page and fill it with data from the file.
3999 if (*pl = page_lookup(vp, off, SE_SHARED))
4001 else if (err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw))
4004 ASSERT3U((*pl)->p_offset, ==, off);
4008 ASSERT3U(len, >=, PAGESIZE);
4011 ASSERT3U(plsz, >=, PAGESIZE);
4018 * Fill out the page array with any pages already in the cache.
4021 (*pl++ = page_lookup_nowait(vp, off, SE_SHARED))) {
4028 * Release any pages we have previously locked.
4033 ZFS_ACCESSTIME_STAMP(zfsvfs, zp);
4043 * Request a memory map for a section of a file. This code interacts
4044 * with common code and the VM system as follows:
4046 * common code calls mmap(), which ends up in smmap_common()
4048 * this calls VOP_MAP(), which takes you into (say) zfs
4050 * zfs_map() calls as_map(), passing segvn_create() as the callback
4052 * segvn_create() creates the new segment and calls VOP_ADDMAP()
4054 * zfs_addmap() updates z_mapcnt
4058 zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp,
4059 size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr,
4060 caller_context_t *ct)
4062 znode_t *zp = VTOZ(vp);
4063 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
4064 segvn_crargs_t vn_a;
4070 if ((prot & PROT_WRITE) &&
4071 (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_READONLY |
4077 if ((prot & (PROT_READ | PROT_EXEC)) &&
4078 (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED)) {
4083 if (vp->v_flag & VNOMAP) {
4088 if (off < 0 || len > MAXOFFSET_T - off) {
4093 if (vp->v_type != VREG) {
4099 * If file is locked, disallow mapping.
4101 if (MANDMODE((mode_t)zp->z_phys->zp_mode) && vn_has_flocks(vp)) {
4107 error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags);
4115 vn_a.offset = (u_offset_t)off;
4116 vn_a.type = flags & MAP_TYPE;
4118 vn_a.maxprot = maxprot;
4121 vn_a.flags = flags & ~MAP_TYPE;
4123 vn_a.lgrp_mem_policy_flags = 0;
4125 error = as_map(as, *addrp, len, segvn_create, &vn_a);
4134 zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr,
4135 size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr,
4136 caller_context_t *ct)
4138 uint64_t pages = btopr(len);
4140 atomic_add_64(&VTOZ(vp)->z_mapcnt, pages);
4145 * The reason we push dirty pages as part of zfs_delmap() is so that we get a
4146 * more accurate mtime for the associated file. Since we don't have a way of
4147 * detecting when the data was actually modified, we have to resort to
4148 * heuristics. If an explicit msync() is done, then we mark the mtime when the
4149 * last page is pushed. The problem occurs when the msync() call is omitted,
4150 * which by far the most common case:
4158 * putpage() via fsflush
4160 * If we wait until fsflush to come along, we can have a modification time that
4161 * is some arbitrary point in the future. In order to prevent this in the
4162 * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is
4167 zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr,
4168 size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr,
4169 caller_context_t *ct)
4171 uint64_t pages = btopr(len);
4173 ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages);
4174 atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages);
4176 if ((flags & MAP_SHARED) && (prot & PROT_WRITE) &&
4177 vn_has_cached_data(vp))
4178 (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct);
4184 * Free or allocate space in a file. Currently, this function only
4185 * supports the `F_FREESP' command. However, this command is somewhat
4186 * misnamed, as its functionality includes the ability to allocate as
4187 * well as free space.
4189 * IN: vp - vnode of file to free data in.
4190 * cmd - action to take (only F_FREESP supported).
4191 * bfp - section of file to free/alloc.
4192 * flag - current file open mode flags.
4193 * offset - current file offset.
4194 * cr - credentials of caller [UNUSED].
4195 * ct - caller context.
4197 * RETURN: 0 if success
4198 * error code if failure
4201 * vp - ctime|mtime updated
4205 zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag,
4206 offset_t offset, cred_t *cr, caller_context_t *ct)
4208 znode_t *zp = VTOZ(vp);
4209 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
4216 if (cmd != F_FREESP) {
4221 if (error = convoff(vp, bfp, 0, offset)) {
4226 if (bfp->l_len < 0) {
4232 len = bfp->l_len; /* 0 means from off to end of file */
4234 error = zfs_freesp(zp, off, len, flag, TRUE);
4242 zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
4244 znode_t *zp = VTOZ(vp);
4245 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
4247 uint64_t object = zp->z_id;
4253 gen = (uint32_t)zp->z_gen;
4255 size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN;
4256 if (fidp->fid_len < size) {
4257 fidp->fid_len = size;
4262 zfid = (zfid_short_t *)fidp;
4264 zfid->zf_len = size;
4266 for (i = 0; i < sizeof (zfid->zf_object); i++)
4267 zfid->zf_object[i] = (uint8_t)(object >> (8 * i));
4269 /* Must have a non-zero generation number to distinguish from .zfs */
4272 for (i = 0; i < sizeof (zfid->zf_gen); i++)
4273 zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i));
4275 if (size == LONG_FID_LEN) {
4276 uint64_t objsetid = dmu_objset_id(zfsvfs->z_os);
4279 zlfid = (zfid_long_t *)fidp;
4281 for (i = 0; i < sizeof (zlfid->zf_setid); i++)
4282 zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i));
4284 /* XXX - this should be the generation number for the objset */
4285 for (i = 0; i < sizeof (zlfid->zf_setgen); i++)
4286 zlfid->zf_setgen[i] = 0;
4294 zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
4295 caller_context_t *ct)
4307 case _PC_FILESIZEBITS:
4311 case _PC_XATTR_EXISTS:
4313 zfsvfs = zp->z_zfsvfs;
4317 error = zfs_dirent_lock(&dl, zp, "", &xzp,
4318 ZXATTR | ZEXISTS | ZSHARED, NULL, NULL);
4320 zfs_dirent_unlock(dl);
4321 if (!zfs_dirempty(xzp))
4324 } else if (error == ENOENT) {
4326 * If there aren't extended attributes, it's the
4327 * same as having zero of them.
4334 case _PC_SATTR_ENABLED:
4335 case _PC_SATTR_EXISTS:
4336 *valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) &&
4337 (vp->v_type == VREG || vp->v_type == VDIR);
4340 case _PC_ACL_ENABLED:
4341 *valp = _ACL_ACE_ENABLED;
4344 case _PC_MIN_HOLE_SIZE:
4345 *valp = (ulong_t)SPA_MINBLOCKSIZE;
4349 return (fs_pathconf(vp, cmd, valp, cr, ct));
4355 zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr,
4356 caller_context_t *ct)
4358 znode_t *zp = VTOZ(vp);
4359 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
4361 boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
4365 error = zfs_getacl(zp, vsecp, skipaclchk, cr);
4373 zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr,
4374 caller_context_t *ct)
4376 znode_t *zp = VTOZ(vp);
4377 zfsvfs_t *zfsvfs = zp->z_zfsvfs;
4379 boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE;
4383 error = zfs_setacl(zp, vsecp, skipaclchk, cr);
4389 * Predeclare these here so that the compiler assumes that
4390 * this is an "old style" function declaration that does
4391 * not include arguments => we won't get type mismatch errors
4392 * in the initializations that follow.
4394 static int zfs_inval();
4395 static int zfs_isdir();
4409 * Directory vnode operations template
4411 vnodeops_t *zfs_dvnodeops;
4412 const fs_operation_def_t zfs_dvnodeops_template[] = {
4413 VOPNAME_OPEN, { .vop_open = zfs_open },
4414 VOPNAME_CLOSE, { .vop_close = zfs_close },
4415 VOPNAME_READ, { .error = zfs_isdir },
4416 VOPNAME_WRITE, { .error = zfs_isdir },
4417 VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl },
4418 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr },
4419 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr },
4420 VOPNAME_ACCESS, { .vop_access = zfs_access },
4421 VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup },
4422 VOPNAME_CREATE, { .vop_create = zfs_create },
4423 VOPNAME_REMOVE, { .vop_remove = zfs_remove },
4424 VOPNAME_LINK, { .vop_link = zfs_link },
4425 VOPNAME_RENAME, { .vop_rename = zfs_rename },
4426 VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir },
4427 VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir },
4428 VOPNAME_READDIR, { .vop_readdir = zfs_readdir },
4429 VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink },
4430 VOPNAME_FSYNC, { .vop_fsync = zfs_fsync },
4431 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive },
4432 VOPNAME_FID, { .vop_fid = zfs_fid },
4433 VOPNAME_SEEK, { .vop_seek = zfs_seek },
4434 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf },
4435 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr },
4436 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr },
4437 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support },
4442 * Regular file vnode operations template
4444 vnodeops_t *zfs_fvnodeops;
4445 const fs_operation_def_t zfs_fvnodeops_template[] = {
4446 VOPNAME_OPEN, { .vop_open = zfs_open },
4447 VOPNAME_CLOSE, { .vop_close = zfs_close },
4448 VOPNAME_READ, { .vop_read = zfs_read },
4449 VOPNAME_WRITE, { .vop_write = zfs_write },
4450 VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl },
4451 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr },
4452 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr },
4453 VOPNAME_ACCESS, { .vop_access = zfs_access },
4454 VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup },
4455 VOPNAME_RENAME, { .vop_rename = zfs_rename },
4456 VOPNAME_FSYNC, { .vop_fsync = zfs_fsync },
4457 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive },
4458 VOPNAME_FID, { .vop_fid = zfs_fid },
4459 VOPNAME_SEEK, { .vop_seek = zfs_seek },
4460 VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock },
4461 VOPNAME_SPACE, { .vop_space = zfs_space },
4462 VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage },
4463 VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage },
4464 VOPNAME_MAP, { .vop_map = zfs_map },
4465 VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap },
4466 VOPNAME_DELMAP, { .vop_delmap = zfs_delmap },
4467 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf },
4468 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr },
4469 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr },
4470 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support },
4475 * Symbolic link vnode operations template
4477 vnodeops_t *zfs_symvnodeops;
4478 const fs_operation_def_t zfs_symvnodeops_template[] = {
4479 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr },
4480 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr },
4481 VOPNAME_ACCESS, { .vop_access = zfs_access },
4482 VOPNAME_RENAME, { .vop_rename = zfs_rename },
4483 VOPNAME_READLINK, { .vop_readlink = zfs_readlink },
4484 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive },
4485 VOPNAME_FID, { .vop_fid = zfs_fid },
4486 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf },
4487 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support },
4492 * Extended attribute directory vnode operations template
4493 * This template is identical to the directory vnodes
4494 * operation template except for restricted operations:
4497 * Note that there are other restrictions embedded in:
4498 * zfs_create() - restrict type to VREG
4499 * zfs_link() - no links into/out of attribute space
4500 * zfs_rename() - no moves into/out of attribute space
4502 vnodeops_t *zfs_xdvnodeops;
4503 const fs_operation_def_t zfs_xdvnodeops_template[] = {
4504 VOPNAME_OPEN, { .vop_open = zfs_open },
4505 VOPNAME_CLOSE, { .vop_close = zfs_close },
4506 VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl },
4507 VOPNAME_GETATTR, { .vop_getattr = zfs_getattr },
4508 VOPNAME_SETATTR, { .vop_setattr = zfs_setattr },
4509 VOPNAME_ACCESS, { .vop_access = zfs_access },
4510 VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup },
4511 VOPNAME_CREATE, { .vop_create = zfs_create },
4512 VOPNAME_REMOVE, { .vop_remove = zfs_remove },
4513 VOPNAME_LINK, { .vop_link = zfs_link },
4514 VOPNAME_RENAME, { .vop_rename = zfs_rename },
4515 VOPNAME_MKDIR, { .error = zfs_inval },
4516 VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir },
4517 VOPNAME_READDIR, { .vop_readdir = zfs_readdir },
4518 VOPNAME_SYMLINK, { .error = zfs_inval },
4519 VOPNAME_FSYNC, { .vop_fsync = zfs_fsync },
4520 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive },
4521 VOPNAME_FID, { .vop_fid = zfs_fid },
4522 VOPNAME_SEEK, { .vop_seek = zfs_seek },
4523 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf },
4524 VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr },
4525 VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr },
4526 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support },
4531 * Error vnode operations template
4533 vnodeops_t *zfs_evnodeops;
4534 const fs_operation_def_t zfs_evnodeops_template[] = {
4535 VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive },
4536 VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf },