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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
25 /* Portions Copyright 2007 Jeremy Teo */
26 /* Portions Copyright 2010 Robert Milkowski */
30 #include <sys/types.h>
31 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/sysmacros.h>
35 #include <sys/resource.h>
37 #include <sys/vfs_opreg.h>
38 #include <sys/vnode.h>
42 #include <sys/taskq.h>
44 #include <sys/vmsystm.h>
45 #include <sys/atomic.h>
47 #include <vm/seg_vn.h>
51 #include <vm/seg_kpm.h>
53 #include <sys/pathname.h>
54 #include <sys/cmn_err.h>
55 #include <sys/errno.h>
56 #include <sys/unistd.h>
57 #include <sys/zfs_dir.h>
58 #include <sys/zfs_acl.h>
59 #include <sys/zfs_ioctl.h>
60 #include <sys/fs/zfs.h>
62 #include <sys/dmu_objset.h>
68 #include <sys/dirent.h>
69 #include <sys/policy.h>
70 #include <sys/sunddi.h>
71 #include <sys/filio.h>
73 #include "fs/fs_subr.h"
74 #include <sys/zfs_ctldir.h>
75 #include <sys/zfs_fuid.h>
76 #include <sys/zfs_sa.h>
78 #include <sys/zfs_rlock.h>
79 #include <sys/extdirent.h>
80 #include <sys/kidmap.h>
87 * Each vnode op performs some logical unit of work. To do this, the ZPL must
88 * properly lock its in-core state, create a DMU transaction, do the work,
89 * record this work in the intent log (ZIL), commit the DMU transaction,
90 * and wait for the intent log to commit if it is a synchronous operation.
91 * Moreover, the vnode ops must work in both normal and log replay context.
92 * The ordering of events is important to avoid deadlocks and references
93 * to freed memory. The example below illustrates the following Big Rules:
95 * (1) A check must be made in each zfs thread for a mounted file system.
96 * This is done avoiding races using ZFS_ENTER(zfsvfs).
97 * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes
98 * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros
99 * can return EIO from the calling function.
101 * (2) VN_RELE() should always be the last thing except for zil_commit()
102 * (if necessary) and ZFS_EXIT(). This is for 3 reasons:
103 * First, if it's the last reference, the vnode/znode
104 * can be freed, so the zp may point to freed memory. Second, the last
105 * reference will call zfs_zinactive(), which may induce a lot of work --
106 * pushing cached pages (which acquires range locks) and syncing out
107 * cached atime changes. Third, zfs_zinactive() may require a new tx,
108 * which could deadlock the system if you were already holding one.
109 * If you must call VN_RELE() within a tx then use VN_RELE_ASYNC().
111 * (3) All range locks must be grabbed before calling dmu_tx_assign(),
112 * as they can span dmu_tx_assign() calls.
114 * (4) Always pass TXG_NOWAIT as the second argument to dmu_tx_assign().
115 * This is critical because we don't want to block while holding locks.
116 * Note, in particular, that if a lock is sometimes acquired before
117 * the tx assigns, and sometimes after (e.g. z_lock), then failing to
118 * use a non-blocking assign can deadlock the system. The scenario:
120 * Thread A has grabbed a lock before calling dmu_tx_assign().
121 * Thread B is in an already-assigned tx, and blocks for this lock.
122 * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open()
123 * forever, because the previous txg can't quiesce until B's tx commits.
125 * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT,
126 * then drop all locks, call dmu_tx_wait(), and try again.
128 * (5) If the operation succeeded, generate the intent log entry for it
129 * before dropping locks. This ensures that the ordering of events
130 * in the intent log matches the order in which they actually occurred.
131 * During ZIL replay the zfs_log_* functions will update the sequence
132 * number to indicate the zil transaction has replayed.
134 * (6) At the end of each vnode op, the DMU tx must always commit,
135 * regardless of whether there were any errors.
137 * (7) After dropping all locks, invoke zil_commit(zilog, foid)
138 * to ensure that synchronous semantics are provided when necessary.
140 * In general, this is how things should be ordered in each vnode op:
142 * ZFS_ENTER(zfsvfs); // exit if unmounted
144 * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD())
145 * rw_enter(...); // grab any other locks you need
146 * tx = dmu_tx_create(...); // get DMU tx
147 * dmu_tx_hold_*(); // hold each object you might modify
148 * error = dmu_tx_assign(tx, TXG_NOWAIT); // try to assign
150 * rw_exit(...); // drop locks
151 * zfs_dirent_unlock(dl); // unlock directory entry
152 * VN_RELE(...); // release held vnodes
153 * if (error == ERESTART) {
158 * dmu_tx_abort(tx); // abort DMU tx
159 * ZFS_EXIT(zfsvfs); // finished in zfs
160 * return (error); // really out of space
162 * error = do_real_work(); // do whatever this VOP does
164 * zfs_log_*(...); // on success, make ZIL entry
165 * dmu_tx_commit(tx); // commit DMU tx -- error or not
166 * rw_exit(...); // drop locks
167 * zfs_dirent_unlock(dl); // unlock directory entry
168 * VN_RELE(...); // release held vnodes
169 * zil_commit(zilog, foid); // synchronous when necessary
170 * ZFS_EXIT(zfsvfs); // finished in zfs
171 * return (error); // done, report error
176 zfs_open(vnode_t
**vpp
, int flag
, cred_t
*cr
, caller_context_t
*ct
)
178 znode_t
*zp
= VTOZ(*vpp
);
179 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
184 if ((flag
& FWRITE
) && (zp
->z_pflags
& ZFS_APPENDONLY
) &&
185 ((flag
& FAPPEND
) == 0)) {
190 if (!zfs_has_ctldir(zp
) && zp
->z_zfsvfs
->z_vscan
&&
191 ZTOV(zp
)->v_type
== VREG
&&
192 !(zp
->z_pflags
& ZFS_AV_QUARANTINED
) && zp
->z_size
> 0) {
193 if (fs_vscan(*vpp
, cr
, 0) != 0) {
199 /* Keep a count of the synchronous opens in the znode */
200 if (flag
& (FSYNC
| FDSYNC
))
201 atomic_inc_32(&zp
->z_sync_cnt
);
209 zfs_close(vnode_t
*vp
, int flag
, int count
, offset_t offset
, cred_t
*cr
,
210 caller_context_t
*ct
)
212 znode_t
*zp
= VTOZ(vp
);
213 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
216 * Clean up any locks held by this process on the vp.
218 cleanlocks(vp
, ddi_get_pid(), 0);
219 cleanshares(vp
, ddi_get_pid());
224 /* Decrement the synchronous opens in the znode */
225 if ((flag
& (FSYNC
| FDSYNC
)) && (count
== 1))
226 atomic_dec_32(&zp
->z_sync_cnt
);
228 if (!zfs_has_ctldir(zp
) && zp
->z_zfsvfs
->z_vscan
&&
229 ZTOV(zp
)->v_type
== VREG
&&
230 !(zp
->z_pflags
& ZFS_AV_QUARANTINED
) && zp
->z_size
> 0)
231 VERIFY(fs_vscan(vp
, cr
, 1) == 0);
238 * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and
239 * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter.
242 zfs_holey(vnode_t
*vp
, int cmd
, offset_t
*off
)
244 znode_t
*zp
= VTOZ(vp
);
245 uint64_t noff
= (uint64_t)*off
; /* new offset */
250 file_sz
= zp
->z_size
;
251 if (noff
>= file_sz
) {
255 if (cmd
== _FIO_SEEK_HOLE
)
260 error
= dmu_offset_next(zp
->z_zfsvfs
->z_os
, zp
->z_id
, hole
, &noff
);
263 if ((error
== ESRCH
) || (noff
> file_sz
)) {
265 * Handle the virtual hole at the end of file.
282 zfs_ioctl(vnode_t
*vp
, int com
, intptr_t data
, int flag
, cred_t
*cred
,
283 int *rvalp
, caller_context_t
*ct
)
292 return (zfs_sync(vp
->v_vfsp
, 0, cred
));
295 * The following two ioctls are used by bfu. Faking out,
296 * necessary to avoid bfu errors.
304 if (ddi_copyin((void *)data
, &off
, sizeof (off
), flag
))
308 zfsvfs
= zp
->z_zfsvfs
;
312 /* offset parameter is in/out */
313 error
= zfs_holey(vp
, com
, &off
);
317 if (ddi_copyout(&off
, (void *)data
, sizeof (off
), flag
))
324 #if defined(_KERNEL) && defined(HAVE_UIO_RW)
326 * Utility functions to map and unmap a single physical page. These
327 * are used to manage the mappable copies of ZFS file data, and therefore
328 * do not update ref/mod bits.
331 zfs_map_page(page_t
*pp
, enum seg_rw rw
)
334 return (hat_kpm_mapin(pp
, 0));
335 ASSERT(rw
== S_READ
|| rw
== S_WRITE
);
336 return (ppmapin(pp
, PROT_READ
| ((rw
== S_WRITE
) ? PROT_WRITE
: 0),
341 zfs_unmap_page(page_t
*pp
, caddr_t addr
)
344 hat_kpm_mapout(pp
, 0, addr
);
349 #endif /* _KERNEL && HAVE_UIO_RW */
352 * When a file is memory mapped, we must keep the IO data synchronized
353 * between the DMU cache and the memory mapped pages. What this means:
355 * On Write: If we find a memory mapped page, we write to *both*
356 * the page and the dmu buffer.
359 update_pages(vnode_t
*vp
, int64_t start
, int len
, objset_t
*os
, uint64_t oid
)
363 off
= start
& PAGEOFFSET
;
364 for (start
&= PAGEMASK
; len
> 0; start
+= PAGESIZE
) {
366 uint64_t nbytes
= MIN(PAGESIZE
- off
, len
);
368 if (pp
= page_lookup(vp
, start
, SE_SHARED
)) {
371 va
= zfs_map_page(pp
, S_WRITE
);
372 (void) dmu_read(os
, oid
, start
+off
, nbytes
, va
+off
,
374 zfs_unmap_page(pp
, va
);
383 * When a file is memory mapped, we must keep the IO data synchronized
384 * between the DMU cache and the memory mapped pages. What this means:
386 * On Read: We "read" preferentially from memory mapped pages,
387 * else we default from the dmu buffer.
389 * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
390 * the file is memory mapped.
393 mappedread(vnode_t
*vp
, int nbytes
, uio_t
*uio
)
395 znode_t
*zp
= VTOZ(vp
);
396 objset_t
*os
= zp
->z_zfsvfs
->z_os
;
401 start
= uio
->uio_loffset
;
402 off
= start
& PAGEOFFSET
;
403 for (start
&= PAGEMASK
; len
> 0; start
+= PAGESIZE
) {
405 uint64_t bytes
= MIN(PAGESIZE
- off
, len
);
407 if (pp
= page_lookup(vp
, start
, SE_SHARED
)) {
410 va
= zfs_map_page(pp
, S_READ
);
411 error
= uiomove(va
+ off
, bytes
, UIO_READ
, uio
);
412 zfs_unmap_page(pp
, va
);
415 error
= dmu_read_uio(os
, zp
->z_id
, uio
, bytes
);
425 offset_t zfs_read_chunk_size
= 1024 * 1024; /* Tunable */
428 * Read bytes from specified file into supplied buffer.
430 * IN: vp - vnode of file to be read from.
431 * uio - structure supplying read location, range info,
433 * ioflag - SYNC flags; used to provide FRSYNC semantics.
434 * cr - credentials of caller.
435 * ct - caller context
437 * OUT: uio - updated offset and range, buffer filled.
439 * RETURN: 0 if success
440 * error code if failure
443 * vp - atime updated if byte count > 0
447 zfs_read(vnode_t
*vp
, uio_t
*uio
, int ioflag
, cred_t
*cr
, caller_context_t
*ct
)
449 znode_t
*zp
= VTOZ(vp
);
450 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
461 if (zp
->z_pflags
& ZFS_AV_QUARANTINED
) {
467 * Validate file offset
469 if (uio
->uio_loffset
< (offset_t
)0) {
475 * Fasttrack empty reads
477 if (uio
->uio_resid
== 0) {
483 * Check for mandatory locks
485 if (MANDMODE(zp
->z_mode
)) {
486 if (error
= chklock(vp
, FREAD
,
487 uio
->uio_loffset
, uio
->uio_resid
, uio
->uio_fmode
, ct
)) {
494 * If we're in FRSYNC mode, sync out this znode before reading it.
496 if (ioflag
& FRSYNC
|| zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
497 zil_commit(zfsvfs
->z_log
, zp
->z_id
);
500 * Lock the range against changes.
502 rl
= zfs_range_lock(zp
, uio
->uio_loffset
, uio
->uio_resid
, RL_READER
);
505 * If we are reading past end-of-file we can skip
506 * to the end; but we might still need to set atime.
508 if (uio
->uio_loffset
>= zp
->z_size
) {
513 ASSERT(uio
->uio_loffset
< zp
->z_size
);
514 n
= MIN(uio
->uio_resid
, zp
->z_size
- uio
->uio_loffset
);
516 if ((uio
->uio_extflg
== UIO_XUIO
) &&
517 (((xuio_t
*)uio
)->xu_type
== UIOTYPE_ZEROCOPY
)) {
519 int blksz
= zp
->z_blksz
;
520 uint64_t offset
= uio
->uio_loffset
;
522 xuio
= (xuio_t
*)uio
;
524 nblk
= (P2ROUNDUP(offset
+ n
, blksz
) - P2ALIGN(offset
,
527 ASSERT(offset
+ n
<= blksz
);
530 (void) dmu_xuio_init(xuio
, nblk
);
532 if (vn_has_cached_data(vp
)) {
534 * For simplicity, we always allocate a full buffer
535 * even if we only expect to read a portion of a block.
537 while (--nblk
>= 0) {
538 (void) dmu_xuio_add(xuio
,
539 dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
546 nbytes
= MIN(n
, zfs_read_chunk_size
-
547 P2PHASE(uio
->uio_loffset
, zfs_read_chunk_size
));
549 if (vn_has_cached_data(vp
))
550 error
= mappedread(vp
, nbytes
, uio
);
552 error
= dmu_read_uio(os
, zp
->z_id
, uio
, nbytes
);
554 /* convert checksum errors into IO errors */
563 zfs_range_unlock(rl
);
565 ZFS_ACCESSTIME_STAMP(zfsvfs
, zp
);
571 * Write the bytes to a file.
573 * IN: vp - vnode of file to be written to.
574 * uio - structure supplying write location, range info,
576 * ioflag - FAPPEND flag set if in append mode.
577 * cr - credentials of caller.
578 * ct - caller context (NFS/CIFS fem monitor only)
580 * OUT: uio - updated offset and range.
582 * RETURN: 0 if success
583 * error code if failure
586 * vp - ctime|mtime updated if byte count > 0
591 zfs_write(vnode_t
*vp
, uio_t
*uio
, int ioflag
, cred_t
*cr
, caller_context_t
*ct
)
593 znode_t
*zp
= VTOZ(vp
);
594 rlim64_t limit
= uio
->uio_llimit
;
595 ssize_t start_resid
= uio
->uio_resid
;
599 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
604 int max_blksz
= zfsvfs
->z_max_blksz
;
610 int iovcnt
= uio
->uio_iovcnt
;
611 iovec_t
*iovp
= uio
->uio_iov
;
614 sa_bulk_attr_t bulk
[4];
615 uint64_t mtime
[2], ctime
[2];
618 * Fasttrack empty write
624 if (limit
== RLIM64_INFINITY
|| limit
> MAXOFFSET_T
)
630 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
, &mtime
, 16);
631 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
, &ctime
, 16);
632 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_SIZE(zfsvfs
), NULL
,
634 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
), NULL
,
638 * If immutable or not appending then return EPERM
640 if ((zp
->z_pflags
& (ZFS_IMMUTABLE
| ZFS_READONLY
)) ||
641 ((zp
->z_pflags
& ZFS_APPENDONLY
) && !(ioflag
& FAPPEND
) &&
642 (uio
->uio_loffset
< zp
->z_size
))) {
647 zilog
= zfsvfs
->z_log
;
650 * Validate file offset
652 woff
= ioflag
& FAPPEND
? zp
->z_size
: uio
->uio_loffset
;
659 * Check for mandatory locks before calling zfs_range_lock()
660 * in order to prevent a deadlock with locks set via fcntl().
662 if (MANDMODE((mode_t
)zp
->z_mode
) &&
663 (error
= chklock(vp
, FWRITE
, woff
, n
, uio
->uio_fmode
, ct
)) != 0) {
669 * Pre-fault the pages to ensure slow (eg NFS) pages
671 * Skip this if uio contains loaned arc_buf.
673 if ((uio
->uio_extflg
== UIO_XUIO
) &&
674 (((xuio_t
*)uio
)->xu_type
== UIOTYPE_ZEROCOPY
))
675 xuio
= (xuio_t
*)uio
;
677 uio_prefaultpages(MIN(n
, max_blksz
), uio
);
680 * If in append mode, set the io offset pointer to eof.
682 if (ioflag
& FAPPEND
) {
684 * Obtain an appending range lock to guarantee file append
685 * semantics. We reset the write offset once we have the lock.
687 rl
= zfs_range_lock(zp
, 0, n
, RL_APPEND
);
689 if (rl
->r_len
== UINT64_MAX
) {
691 * We overlocked the file because this write will cause
692 * the file block size to increase.
693 * Note that zp_size cannot change with this lock held.
697 uio
->uio_loffset
= woff
;
700 * Note that if the file block size will change as a result of
701 * this write, then this range lock will lock the entire file
702 * so that we can re-write the block safely.
704 rl
= zfs_range_lock(zp
, woff
, n
, RL_WRITER
);
708 zfs_range_unlock(rl
);
713 if ((woff
+ n
) > limit
|| woff
> (limit
- n
))
716 /* Will this write extend the file length? */
717 write_eof
= (woff
+ n
> zp
->z_size
);
719 end_size
= MAX(zp
->z_size
, woff
+ n
);
722 * Write the file in reasonable size chunks. Each chunk is written
723 * in a separate transaction; this keeps the intent log records small
724 * and allows us to do more fine-grained space accounting.
728 woff
= uio
->uio_loffset
;
730 if (zfs_owner_overquota(zfsvfs
, zp
, B_FALSE
) ||
731 zfs_owner_overquota(zfsvfs
, zp
, B_TRUE
)) {
733 dmu_return_arcbuf(abuf
);
738 if (xuio
&& abuf
== NULL
) {
739 ASSERT(i_iov
< iovcnt
);
741 abuf
= dmu_xuio_arcbuf(xuio
, i_iov
);
742 dmu_xuio_clear(xuio
, i_iov
);
743 DTRACE_PROBE3(zfs_cp_write
, int, i_iov
,
744 iovec_t
*, aiov
, arc_buf_t
*, abuf
);
745 ASSERT((aiov
->iov_base
== abuf
->b_data
) ||
746 ((char *)aiov
->iov_base
- (char *)abuf
->b_data
+
747 aiov
->iov_len
== arc_buf_size(abuf
)));
749 } else if (abuf
== NULL
&& n
>= max_blksz
&&
750 woff
>= zp
->z_size
&&
751 P2PHASE(woff
, max_blksz
) == 0 &&
752 zp
->z_blksz
== max_blksz
) {
754 * This write covers a full block. "Borrow" a buffer
755 * from the dmu so that we can fill it before we enter
756 * a transaction. This avoids the possibility of
757 * holding up the transaction if the data copy hangs
758 * up on a pagefault (e.g., from an NFS server mapping).
762 abuf
= dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
764 ASSERT(abuf
!= NULL
);
765 ASSERT(arc_buf_size(abuf
) == max_blksz
);
766 if ((error
= uiocopy(abuf
->b_data
, max_blksz
,
767 UIO_WRITE
, uio
, &cbytes
))) {
768 dmu_return_arcbuf(abuf
);
771 ASSERT(cbytes
== max_blksz
);
775 * Start a transaction.
777 tx
= dmu_tx_create(zfsvfs
->z_os
);
778 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
779 dmu_tx_hold_write(tx
, zp
->z_id
, woff
, MIN(n
, max_blksz
));
780 zfs_sa_upgrade_txholds(tx
, zp
);
781 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
783 if (error
== ERESTART
) {
790 dmu_return_arcbuf(abuf
);
795 * If zfs_range_lock() over-locked we grow the blocksize
796 * and then reduce the lock range. This will only happen
797 * on the first iteration since zfs_range_reduce() will
798 * shrink down r_len to the appropriate size.
800 if (rl
->r_len
== UINT64_MAX
) {
803 if (zp
->z_blksz
> max_blksz
) {
804 ASSERT(!ISP2(zp
->z_blksz
));
805 new_blksz
= MIN(end_size
, SPA_MAXBLOCKSIZE
);
807 new_blksz
= MIN(end_size
, max_blksz
);
809 zfs_grow_blocksize(zp
, new_blksz
, tx
);
810 zfs_range_reduce(rl
, woff
, n
);
814 * XXX - should we really limit each write to z_max_blksz?
815 * Perhaps we should use SPA_MAXBLOCKSIZE chunks?
817 nbytes
= MIN(n
, max_blksz
- P2PHASE(woff
, max_blksz
));
820 tx_bytes
= uio
->uio_resid
;
821 error
= dmu_write_uio_dbuf(sa_get_db(zp
->z_sa_hdl
),
823 tx_bytes
-= uio
->uio_resid
;
826 ASSERT(xuio
== NULL
|| tx_bytes
== aiov
->iov_len
);
828 * If this is not a full block write, but we are
829 * extending the file past EOF and this data starts
830 * block-aligned, use assign_arcbuf(). Otherwise,
831 * write via dmu_write().
833 if (tx_bytes
< max_blksz
&& (!write_eof
||
834 aiov
->iov_base
!= abuf
->b_data
)) {
836 dmu_write(zfsvfs
->z_os
, zp
->z_id
, woff
,
837 aiov
->iov_len
, aiov
->iov_base
, tx
);
838 dmu_return_arcbuf(abuf
);
839 xuio_stat_wbuf_copied();
841 ASSERT(xuio
|| tx_bytes
== max_blksz
);
842 dmu_assign_arcbuf(sa_get_db(zp
->z_sa_hdl
),
845 ASSERT(tx_bytes
<= uio
->uio_resid
);
846 uioskip(uio
, tx_bytes
);
848 if (tx_bytes
&& vn_has_cached_data(vp
)) {
849 update_pages(vp
, woff
,
850 tx_bytes
, zfsvfs
->z_os
, zp
->z_id
);
854 * If we made no progress, we're done. If we made even
855 * partial progress, update the znode and ZIL accordingly.
858 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_SIZE(zfsvfs
),
859 (void *)&zp
->z_size
, sizeof (uint64_t), tx
);
866 * Clear Set-UID/Set-GID bits on successful write if not
867 * privileged and at least one of the excute bits is set.
869 * It would be nice to to this after all writes have
870 * been done, but that would still expose the ISUID/ISGID
871 * to another app after the partial write is committed.
873 * Note: we don't call zfs_fuid_map_id() here because
874 * user 0 is not an ephemeral uid.
876 mutex_enter(&zp
->z_acl_lock
);
877 if ((zp
->z_mode
& (S_IXUSR
| (S_IXUSR
>> 3) |
878 (S_IXUSR
>> 6))) != 0 &&
879 (zp
->z_mode
& (S_ISUID
| S_ISGID
)) != 0 &&
880 secpolicy_vnode_setid_retain(cr
,
881 (zp
->z_mode
& S_ISUID
) != 0 && zp
->z_uid
== 0) != 0) {
883 zp
->z_mode
&= ~(S_ISUID
| S_ISGID
);
884 newmode
= zp
->z_mode
;
885 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_MODE(zfsvfs
),
886 (void *)&newmode
, sizeof (uint64_t), tx
);
888 mutex_exit(&zp
->z_acl_lock
);
890 zfs_tstamp_update_setup(zp
, CONTENT_MODIFIED
, mtime
, ctime
,
894 * Update the file size (zp_size) if it has changed;
895 * account for possible concurrent updates.
897 while ((end_size
= zp
->z_size
) < uio
->uio_loffset
) {
898 (void) atomic_cas_64(&zp
->z_size
, end_size
,
903 * If we are replaying and eof is non zero then force
904 * the file size to the specified eof. Note, there's no
905 * concurrency during replay.
907 if (zfsvfs
->z_replay
&& zfsvfs
->z_replay_eof
!= 0)
908 zp
->z_size
= zfsvfs
->z_replay_eof
;
910 error
= sa_bulk_update(zp
->z_sa_hdl
, bulk
, count
, tx
);
912 zfs_log_write(zilog
, tx
, TX_WRITE
, zp
, woff
, tx_bytes
, ioflag
);
917 ASSERT(tx_bytes
== nbytes
);
921 uio_prefaultpages(MIN(n
, max_blksz
), uio
);
924 zfs_range_unlock(rl
);
927 * If we're in replay mode, or we made no progress, return error.
928 * Otherwise, it's at least a partial write, so it's successful.
930 if (zfsvfs
->z_replay
|| uio
->uio_resid
== start_resid
) {
935 if (ioflag
& (FSYNC
| FDSYNC
) ||
936 zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
937 zil_commit(zilog
, zp
->z_id
);
944 zfs_get_done(zgd_t
*zgd
, int error
)
946 znode_t
*zp
= zgd
->zgd_private
;
947 objset_t
*os
= zp
->z_zfsvfs
->z_os
;
950 dmu_buf_rele(zgd
->zgd_db
, zgd
);
952 zfs_range_unlock(zgd
->zgd_rl
);
955 * Release the vnode asynchronously as we currently have the
956 * txg stopped from syncing.
958 VN_RELE_ASYNC(ZTOV(zp
), dsl_pool_vnrele_taskq(dmu_objset_pool(os
)));
960 if (error
== 0 && zgd
->zgd_bp
)
961 zil_add_block(zgd
->zgd_zilog
, zgd
->zgd_bp
);
963 kmem_free(zgd
, sizeof (zgd_t
));
967 static int zil_fault_io
= 0;
971 * Get data to generate a TX_WRITE intent log record.
974 zfs_get_data(void *arg
, lr_write_t
*lr
, char *buf
, zio_t
*zio
)
976 zfsvfs_t
*zfsvfs
= arg
;
977 objset_t
*os
= zfsvfs
->z_os
;
979 uint64_t object
= lr
->lr_foid
;
980 uint64_t offset
= lr
->lr_offset
;
981 uint64_t size
= lr
->lr_length
;
982 blkptr_t
*bp
= &lr
->lr_blkptr
;
991 * Nothing to do if the file has been removed
993 if (zfs_zget(zfsvfs
, object
, &zp
) != 0)
995 if (zp
->z_unlinked
) {
997 * Release the vnode asynchronously as we currently have the
998 * txg stopped from syncing.
1000 VN_RELE_ASYNC(ZTOV(zp
),
1001 dsl_pool_vnrele_taskq(dmu_objset_pool(os
)));
1005 zgd
= (zgd_t
*)kmem_zalloc(sizeof (zgd_t
), KM_SLEEP
);
1006 zgd
->zgd_zilog
= zfsvfs
->z_log
;
1007 zgd
->zgd_private
= zp
;
1010 * Write records come in two flavors: immediate and indirect.
1011 * For small writes it's cheaper to store the data with the
1012 * log record (immediate); for large writes it's cheaper to
1013 * sync the data and get a pointer to it (indirect) so that
1014 * we don't have to write the data twice.
1016 if (buf
!= NULL
) { /* immediate write */
1017 zgd
->zgd_rl
= zfs_range_lock(zp
, offset
, size
, RL_READER
);
1018 /* test for truncation needs to be done while range locked */
1019 if (offset
>= zp
->z_size
) {
1022 error
= dmu_read(os
, object
, offset
, size
, buf
,
1023 DMU_READ_NO_PREFETCH
);
1025 ASSERT(error
== 0 || error
== ENOENT
);
1026 } else { /* indirect write */
1028 * Have to lock the whole block to ensure when it's
1029 * written out and it's checksum is being calculated
1030 * that no one can change the data. We need to re-check
1031 * blocksize after we get the lock in case it's changed!
1036 blkoff
= ISP2(size
) ? P2PHASE(offset
, size
) : offset
;
1038 zgd
->zgd_rl
= zfs_range_lock(zp
, offset
, size
,
1040 if (zp
->z_blksz
== size
)
1043 zfs_range_unlock(zgd
->zgd_rl
);
1045 /* test for truncation needs to be done while range locked */
1046 if (lr
->lr_offset
>= zp
->z_size
)
1055 error
= dmu_buf_hold(os
, object
, offset
, zgd
, &db
,
1056 DMU_READ_NO_PREFETCH
);
1062 ASSERT(db
->db_offset
== offset
);
1063 ASSERT(db
->db_size
== size
);
1065 error
= dmu_sync(zio
, lr
->lr_common
.lrc_txg
,
1067 ASSERT(error
|| lr
->lr_length
<= zp
->z_blksz
);
1070 * On success, we need to wait for the write I/O
1071 * initiated by dmu_sync() to complete before we can
1072 * release this dbuf. We will finish everything up
1073 * in the zfs_get_done() callback.
1078 if (error
== EALREADY
) {
1079 lr
->lr_common
.lrc_txtype
= TX_WRITE2
;
1085 zfs_get_done(zgd
, error
);
1092 zfs_access(vnode_t
*vp
, int mode
, int flag
, cred_t
*cr
,
1093 caller_context_t
*ct
)
1095 znode_t
*zp
= VTOZ(vp
);
1096 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
1102 if (flag
& V_ACE_MASK
)
1103 error
= zfs_zaccess(zp
, mode
, flag
, B_FALSE
, cr
);
1105 error
= zfs_zaccess_rwx(zp
, mode
, flag
, cr
);
1112 * If vnode is for a device return a specfs vnode instead.
1115 specvp_check(vnode_t
**vpp
, cred_t
*cr
)
1119 if (IS_DEVVP(*vpp
)) {
1122 svp
= specvp(*vpp
, (*vpp
)->v_rdev
, (*vpp
)->v_type
, cr
);
1133 * Lookup an entry in a directory, or an extended attribute directory.
1134 * If it exists, return a held vnode reference for it.
1136 * IN: dvp - vnode of directory to search.
1137 * nm - name of entry to lookup.
1138 * pnp - full pathname to lookup [UNUSED].
1139 * flags - LOOKUP_XATTR set if looking for an attribute.
1140 * rdir - root directory vnode [UNUSED].
1141 * cr - credentials of caller.
1142 * ct - caller context
1143 * direntflags - directory lookup flags
1144 * realpnp - returned pathname.
1146 * OUT: vpp - vnode of located entry, NULL if not found.
1148 * RETURN: 0 if success
1149 * error code if failure
1156 zfs_lookup(vnode_t
*dvp
, char *nm
, vnode_t
**vpp
, struct pathname
*pnp
,
1157 int flags
, vnode_t
*rdir
, cred_t
*cr
, caller_context_t
*ct
,
1158 int *direntflags
, pathname_t
*realpnp
)
1160 znode_t
*zdp
= VTOZ(dvp
);
1161 zfsvfs_t
*zfsvfs
= zdp
->z_zfsvfs
;
1165 if (!(flags
& (LOOKUP_XATTR
| FIGNORECASE
))) {
1167 if (dvp
->v_type
!= VDIR
) {
1169 } else if (zdp
->z_sa_hdl
== NULL
) {
1173 if (nm
[0] == 0 || (nm
[0] == '.' && nm
[1] == '\0')) {
1174 error
= zfs_fastaccesschk_execute(zdp
, cr
);
1182 vnode_t
*tvp
= dnlc_lookup(dvp
, nm
);
1185 error
= zfs_fastaccesschk_execute(zdp
, cr
);
1190 if (tvp
== DNLC_NO_VNODE
) {
1195 return (specvp_check(vpp
, cr
));
1201 DTRACE_PROBE2(zfs__fastpath__lookup__miss
, vnode_t
*, dvp
, char *, nm
);
1208 if (flags
& LOOKUP_XATTR
) {
1210 * If the xattr property is off, refuse the lookup request.
1212 if (!(zfsvfs
->z_vfs
->vfs_flag
& VFS_XATTR
)) {
1218 * We don't allow recursive attributes..
1219 * Maybe someday we will.
1221 if (zdp
->z_pflags
& ZFS_XATTR
) {
1226 if ((error
= zfs_get_xattrdir(VTOZ(dvp
), vpp
, cr
, flags
))) {
1232 * Do we have permission to get into attribute directory?
1235 if ((error
= zfs_zaccess(VTOZ(*vpp
), ACE_EXECUTE
, 0,
1245 if (dvp
->v_type
!= VDIR
) {
1251 * Check accessibility of directory.
1254 if ((error
= zfs_zaccess(zdp
, ACE_EXECUTE
, 0, B_FALSE
, cr
))) {
1259 if (zfsvfs
->z_utf8
&& u8_validate(nm
, strlen(nm
),
1260 NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
1265 error
= zfs_dirlook(zdp
, nm
, vpp
, flags
, direntflags
, realpnp
);
1267 error
= specvp_check(vpp
, cr
);
1274 * Attempt to create a new entry in a directory. If the entry
1275 * already exists, truncate the file if permissible, else return
1276 * an error. Return the vp of the created or trunc'd file.
1278 * IN: dvp - vnode of directory to put new file entry in.
1279 * name - name of new file entry.
1280 * vap - attributes of new file.
1281 * excl - flag indicating exclusive or non-exclusive mode.
1282 * mode - mode to open file with.
1283 * cr - credentials of caller.
1284 * flag - large file flag [UNUSED].
1285 * ct - caller context
1286 * vsecp - ACL to be set
1288 * OUT: vpp - vnode of created or trunc'd entry.
1290 * RETURN: 0 if success
1291 * error code if failure
1294 * dvp - ctime|mtime updated if new entry created
1295 * vp - ctime|mtime always, atime if new
1300 zfs_create(vnode_t
*dvp
, char *name
, vattr_t
*vap
, vcexcl_t excl
,
1301 int mode
, vnode_t
**vpp
, cred_t
*cr
, int flag
, caller_context_t
*ct
,
1304 znode_t
*zp
, *dzp
= VTOZ(dvp
);
1305 zfsvfs_t
*zfsvfs
= dzp
->z_zfsvfs
;
1314 zfs_acl_ids_t acl_ids
;
1315 boolean_t fuid_dirtied
;
1316 boolean_t have_acl
= B_FALSE
;
1319 * If we have an ephemeral id, ACL, or XVATTR then
1320 * make sure file system is at proper version
1324 ksid
= crgetsid(cr
, KSID_OWNER
);
1326 uid
= ksid_getid(ksid
);
1330 if (zfsvfs
->z_use_fuids
== B_FALSE
&&
1331 (vsecp
|| (vap
->va_mask
& AT_XVATTR
) ||
1332 IS_EPHEMERAL(uid
) || IS_EPHEMERAL(gid
)))
1338 zilog
= zfsvfs
->z_log
;
1340 if (zfsvfs
->z_utf8
&& u8_validate(name
, strlen(name
),
1341 NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
1346 if (vap
->va_mask
& AT_XVATTR
) {
1347 if ((error
= secpolicy_xvattr((xvattr_t
*)vap
,
1348 crgetuid(cr
), cr
, vap
->va_type
)) != 0) {
1356 if ((vap
->va_mode
& VSVTX
) && secpolicy_vnode_stky_modify(cr
))
1357 vap
->va_mode
&= ~VSVTX
;
1359 if (*name
== '\0') {
1361 * Null component name refers to the directory itself.
1368 /* possible VN_HOLD(zp) */
1371 if (flag
& FIGNORECASE
)
1374 error
= zfs_dirent_lock(&dl
, dzp
, name
, &zp
, zflg
,
1378 zfs_acl_ids_free(&acl_ids
);
1379 if (strcmp(name
, "..") == 0)
1390 * Create a new file object and update the directory
1393 if ((error
= zfs_zaccess(dzp
, ACE_ADD_FILE
, 0, B_FALSE
, cr
))) {
1395 zfs_acl_ids_free(&acl_ids
);
1400 * We only support the creation of regular files in
1401 * extended attribute directories.
1404 if ((dzp
->z_pflags
& ZFS_XATTR
) &&
1405 (vap
->va_type
!= VREG
)) {
1407 zfs_acl_ids_free(&acl_ids
);
1412 if (!have_acl
&& (error
= zfs_acl_ids_create(dzp
, 0, vap
,
1413 cr
, vsecp
, &acl_ids
)) != 0)
1417 if (zfs_acl_ids_overquota(zfsvfs
, &acl_ids
)) {
1418 zfs_acl_ids_free(&acl_ids
);
1423 tx
= dmu_tx_create(os
);
1425 dmu_tx_hold_sa_create(tx
, acl_ids
.z_aclp
->z_acl_bytes
+
1426 ZFS_SA_BASE_ATTR_SIZE
);
1428 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
1430 zfs_fuid_txhold(zfsvfs
, tx
);
1431 dmu_tx_hold_zap(tx
, dzp
->z_id
, TRUE
, name
);
1432 dmu_tx_hold_sa(tx
, dzp
->z_sa_hdl
, B_FALSE
);
1433 if (!zfsvfs
->z_use_sa
&&
1434 acl_ids
.z_aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
1435 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
,
1436 0, acl_ids
.z_aclp
->z_acl_bytes
);
1438 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
1440 zfs_dirent_unlock(dl
);
1441 if (error
== ERESTART
) {
1446 zfs_acl_ids_free(&acl_ids
);
1451 zfs_mknode(dzp
, vap
, tx
, cr
, 0, &zp
, &acl_ids
);
1454 zfs_fuid_sync(zfsvfs
, tx
);
1456 (void) zfs_link_create(dl
, zp
, tx
, ZNEW
);
1457 txtype
= zfs_log_create_txtype(Z_FILE
, vsecp
, vap
);
1458 if (flag
& FIGNORECASE
)
1460 zfs_log_create(zilog
, tx
, txtype
, dzp
, zp
, name
,
1461 vsecp
, acl_ids
.z_fuidp
, vap
);
1462 zfs_acl_ids_free(&acl_ids
);
1465 int aflags
= (flag
& FAPPEND
) ? V_APPEND
: 0;
1468 zfs_acl_ids_free(&acl_ids
);
1472 * A directory entry already exists for this name.
1475 * Can't truncate an existing file if in exclusive mode.
1482 * Can't open a directory for writing.
1484 if ((ZTOV(zp
)->v_type
== VDIR
) && (mode
& S_IWRITE
)) {
1489 * Verify requested access to file.
1491 if (mode
&& (error
= zfs_zaccess_rwx(zp
, mode
, aflags
, cr
))) {
1495 mutex_enter(&dzp
->z_lock
);
1497 mutex_exit(&dzp
->z_lock
);
1500 * Truncate regular files if requested.
1502 if ((ZTOV(zp
)->v_type
== VREG
) &&
1503 (vap
->va_mask
& AT_SIZE
) && (vap
->va_size
== 0)) {
1504 /* we can't hold any locks when calling zfs_freesp() */
1505 zfs_dirent_unlock(dl
);
1507 error
= zfs_freesp(zp
, 0, 0, mode
, TRUE
);
1509 vnevent_create(ZTOV(zp
), ct
);
1516 zfs_dirent_unlock(dl
);
1523 error
= specvp_check(vpp
, cr
);
1526 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
1527 zil_commit(zilog
, 0);
1534 * Remove an entry from a directory.
1536 * IN: dvp - vnode of directory to remove entry from.
1537 * name - name of entry to remove.
1538 * cr - credentials of caller.
1539 * ct - caller context
1540 * flags - case flags
1542 * RETURN: 0 if success
1543 * error code if failure
1547 * vp - ctime (if nlink > 0)
1550 uint64_t null_xattr
= 0;
1554 zfs_remove(vnode_t
*dvp
, char *name
, cred_t
*cr
, caller_context_t
*ct
,
1557 znode_t
*zp
, *dzp
= VTOZ(dvp
);
1560 zfsvfs_t
*zfsvfs
= dzp
->z_zfsvfs
;
1562 uint64_t acl_obj
, xattr_obj
;
1563 uint64_t xattr_obj_unlinked
= 0;
1567 boolean_t may_delete_now
, delete_now
= FALSE
;
1568 boolean_t unlinked
, toobig
= FALSE
;
1570 pathname_t
*realnmp
= NULL
;
1577 zilog
= zfsvfs
->z_log
;
1579 if (flags
& FIGNORECASE
) {
1589 * Attempt to lock directory; fail if entry doesn't exist.
1591 if ((error
= zfs_dirent_lock(&dl
, dzp
, name
, &zp
, zflg
,
1601 if ((error
= zfs_zaccess_delete(dzp
, zp
, cr
))) {
1606 * Need to use rmdir for removing directories.
1608 if (vp
->v_type
== VDIR
) {
1613 vnevent_remove(vp
, dvp
, name
, ct
);
1616 dnlc_remove(dvp
, realnmp
->pn_buf
);
1618 dnlc_remove(dvp
, name
);
1620 mutex_enter(&vp
->v_lock
);
1621 may_delete_now
= ((vp
->v_count
== 1) && (!vn_has_cached_data(vp
)));
1622 mutex_exit(&vp
->v_lock
);
1625 * We may delete the znode now, or we may put it in the unlinked set;
1626 * it depends on whether we're the last link, and on whether there are
1627 * other holds on the vnode. So we dmu_tx_hold() the right things to
1628 * allow for either case.
1631 tx
= dmu_tx_create(zfsvfs
->z_os
);
1632 dmu_tx_hold_zap(tx
, dzp
->z_id
, FALSE
, name
);
1633 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
1634 zfs_sa_upgrade_txholds(tx
, zp
);
1635 zfs_sa_upgrade_txholds(tx
, dzp
);
1636 if (may_delete_now
) {
1638 zp
->z_size
> zp
->z_blksz
* DMU_MAX_DELETEBLKCNT
;
1639 /* if the file is too big, only hold_free a token amount */
1640 dmu_tx_hold_free(tx
, zp
->z_id
, 0,
1641 (toobig
? DMU_MAX_ACCESS
: DMU_OBJECT_END
));
1644 /* are there any extended attributes? */
1645 error
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_XATTR(zfsvfs
),
1646 &xattr_obj
, sizeof (xattr_obj
));
1647 if (error
== 0 && xattr_obj
) {
1648 error
= zfs_zget(zfsvfs
, xattr_obj
, &xzp
);
1649 ASSERT3U(error
, ==, 0);
1650 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_TRUE
);
1651 dmu_tx_hold_sa(tx
, xzp
->z_sa_hdl
, B_FALSE
);
1654 mutex_enter(&zp
->z_lock
);
1655 if ((acl_obj
= zfs_external_acl(zp
)) != 0 && may_delete_now
)
1656 dmu_tx_hold_free(tx
, acl_obj
, 0, DMU_OBJECT_END
);
1657 mutex_exit(&zp
->z_lock
);
1659 /* charge as an update -- would be nice not to charge at all */
1660 dmu_tx_hold_zap(tx
, zfsvfs
->z_unlinkedobj
, FALSE
, NULL
);
1662 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
1664 zfs_dirent_unlock(dl
);
1668 if (error
== ERESTART
) {
1681 * Remove the directory entry.
1683 error
= zfs_link_destroy(dl
, zp
, tx
, zflg
, &unlinked
);
1693 * Hold z_lock so that we can make sure that the ACL obj
1694 * hasn't changed. Could have been deleted due to
1697 mutex_enter(&zp
->z_lock
);
1698 mutex_enter(&vp
->v_lock
);
1699 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_XATTR(zfsvfs
),
1700 &xattr_obj_unlinked
, sizeof (xattr_obj_unlinked
));
1701 delete_now
= may_delete_now
&& !toobig
&&
1702 vp
->v_count
== 1 && !vn_has_cached_data(vp
) &&
1703 xattr_obj
== xattr_obj_unlinked
&& zfs_external_acl(zp
) ==
1705 mutex_exit(&vp
->v_lock
);
1709 if (xattr_obj_unlinked
) {
1710 ASSERT3U(xzp
->z_links
, ==, 2);
1711 mutex_enter(&xzp
->z_lock
);
1712 xzp
->z_unlinked
= 1;
1714 error
= sa_update(xzp
->z_sa_hdl
, SA_ZPL_LINKS(zfsvfs
),
1715 &xzp
->z_links
, sizeof (xzp
->z_links
), tx
);
1716 ASSERT3U(error
, ==, 0);
1717 mutex_exit(&xzp
->z_lock
);
1718 zfs_unlinked_add(xzp
, tx
);
1721 error
= sa_remove(zp
->z_sa_hdl
,
1722 SA_ZPL_XATTR(zfsvfs
), tx
);
1724 error
= sa_update(zp
->z_sa_hdl
,
1725 SA_ZPL_XATTR(zfsvfs
), &null_xattr
,
1726 sizeof (uint64_t), tx
);
1727 ASSERT3U(error
, ==, 0);
1729 mutex_enter(&vp
->v_lock
);
1731 ASSERT3U(vp
->v_count
, ==, 0);
1732 mutex_exit(&vp
->v_lock
);
1733 mutex_exit(&zp
->z_lock
);
1734 zfs_znode_delete(zp
, tx
);
1735 } else if (unlinked
) {
1736 mutex_exit(&zp
->z_lock
);
1737 zfs_unlinked_add(zp
, tx
);
1741 if (flags
& FIGNORECASE
)
1743 zfs_log_remove(zilog
, tx
, txtype
, dzp
, name
, obj
);
1750 zfs_dirent_unlock(dl
);
1757 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
1758 zil_commit(zilog
, 0);
1765 * Create a new directory and insert it into dvp using the name
1766 * provided. Return a pointer to the inserted directory.
1768 * IN: dvp - vnode of directory to add subdir to.
1769 * dirname - name of new directory.
1770 * vap - attributes of new directory.
1771 * cr - credentials of caller.
1772 * ct - caller context
1773 * vsecp - ACL to be set
1775 * OUT: vpp - vnode of created directory.
1777 * RETURN: 0 if success
1778 * error code if failure
1781 * dvp - ctime|mtime updated
1782 * vp - ctime|mtime|atime updated
1786 zfs_mkdir(vnode_t
*dvp
, char *dirname
, vattr_t
*vap
, vnode_t
**vpp
, cred_t
*cr
,
1787 caller_context_t
*ct
, int flags
, vsecattr_t
*vsecp
)
1789 znode_t
*zp
, *dzp
= VTOZ(dvp
);
1790 zfsvfs_t
*zfsvfs
= dzp
->z_zfsvfs
;
1799 gid_t gid
= crgetgid(cr
);
1800 zfs_acl_ids_t acl_ids
;
1801 boolean_t fuid_dirtied
;
1803 ASSERT(vap
->va_type
== VDIR
);
1806 * If we have an ephemeral id, ACL, or XVATTR then
1807 * make sure file system is at proper version
1810 ksid
= crgetsid(cr
, KSID_OWNER
);
1812 uid
= ksid_getid(ksid
);
1815 if (zfsvfs
->z_use_fuids
== B_FALSE
&&
1816 (vsecp
|| (vap
->va_mask
& AT_XVATTR
) ||
1817 IS_EPHEMERAL(uid
) || IS_EPHEMERAL(gid
)))
1822 zilog
= zfsvfs
->z_log
;
1824 if (dzp
->z_pflags
& ZFS_XATTR
) {
1829 if (zfsvfs
->z_utf8
&& u8_validate(dirname
,
1830 strlen(dirname
), NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
1834 if (flags
& FIGNORECASE
)
1837 if (vap
->va_mask
& AT_XVATTR
) {
1838 if ((error
= secpolicy_xvattr((xvattr_t
*)vap
,
1839 crgetuid(cr
), cr
, vap
->va_type
)) != 0) {
1845 if ((error
= zfs_acl_ids_create(dzp
, 0, vap
, cr
,
1846 vsecp
, &acl_ids
)) != 0) {
1851 * First make sure the new directory doesn't exist.
1853 * Existence is checked first to make sure we don't return
1854 * EACCES instead of EEXIST which can cause some applications
1860 if ((error
= zfs_dirent_lock(&dl
, dzp
, dirname
, &zp
, zf
,
1862 zfs_acl_ids_free(&acl_ids
);
1867 if ((error
= zfs_zaccess(dzp
, ACE_ADD_SUBDIRECTORY
, 0, B_FALSE
, cr
))) {
1868 zfs_acl_ids_free(&acl_ids
);
1869 zfs_dirent_unlock(dl
);
1874 if (zfs_acl_ids_overquota(zfsvfs
, &acl_ids
)) {
1875 zfs_acl_ids_free(&acl_ids
);
1876 zfs_dirent_unlock(dl
);
1882 * Add a new entry to the directory.
1884 tx
= dmu_tx_create(zfsvfs
->z_os
);
1885 dmu_tx_hold_zap(tx
, dzp
->z_id
, TRUE
, dirname
);
1886 dmu_tx_hold_zap(tx
, DMU_NEW_OBJECT
, FALSE
, NULL
);
1887 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
1889 zfs_fuid_txhold(zfsvfs
, tx
);
1890 if (!zfsvfs
->z_use_sa
&& acl_ids
.z_aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
1891 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
, 0,
1892 acl_ids
.z_aclp
->z_acl_bytes
);
1895 dmu_tx_hold_sa_create(tx
, acl_ids
.z_aclp
->z_acl_bytes
+
1896 ZFS_SA_BASE_ATTR_SIZE
);
1898 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
1900 zfs_dirent_unlock(dl
);
1901 if (error
== ERESTART
) {
1906 zfs_acl_ids_free(&acl_ids
);
1915 zfs_mknode(dzp
, vap
, tx
, cr
, 0, &zp
, &acl_ids
);
1918 zfs_fuid_sync(zfsvfs
, tx
);
1921 * Now put new name in parent dir.
1923 (void) zfs_link_create(dl
, zp
, tx
, ZNEW
);
1927 txtype
= zfs_log_create_txtype(Z_DIR
, vsecp
, vap
);
1928 if (flags
& FIGNORECASE
)
1930 zfs_log_create(zilog
, tx
, txtype
, dzp
, zp
, dirname
, vsecp
,
1931 acl_ids
.z_fuidp
, vap
);
1933 zfs_acl_ids_free(&acl_ids
);
1937 zfs_dirent_unlock(dl
);
1939 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
1940 zil_commit(zilog
, 0);
1947 * Remove a directory subdir entry. If the current working
1948 * directory is the same as the subdir to be removed, the
1951 * IN: dvp - vnode of directory to remove from.
1952 * name - name of directory to be removed.
1953 * cwd - vnode of current working directory.
1954 * cr - credentials of caller.
1955 * ct - caller context
1956 * flags - case flags
1958 * RETURN: 0 if success
1959 * error code if failure
1962 * dvp - ctime|mtime updated
1966 zfs_rmdir(vnode_t
*dvp
, char *name
, vnode_t
*cwd
, cred_t
*cr
,
1967 caller_context_t
*ct
, int flags
)
1969 znode_t
*dzp
= VTOZ(dvp
);
1972 zfsvfs_t
*zfsvfs
= dzp
->z_zfsvfs
;
1981 zilog
= zfsvfs
->z_log
;
1983 if (flags
& FIGNORECASE
)
1989 * Attempt to lock directory; fail if entry doesn't exist.
1991 if ((error
= zfs_dirent_lock(&dl
, dzp
, name
, &zp
, zflg
,
1999 if ((error
= zfs_zaccess_delete(dzp
, zp
, cr
))) {
2003 if (vp
->v_type
!= VDIR
) {
2013 vnevent_rmdir(vp
, dvp
, name
, ct
);
2016 * Grab a lock on the directory to make sure that noone is
2017 * trying to add (or lookup) entries while we are removing it.
2019 rw_enter(&zp
->z_name_lock
, RW_WRITER
);
2022 * Grab a lock on the parent pointer to make sure we play well
2023 * with the treewalk and directory rename code.
2025 rw_enter(&zp
->z_parent_lock
, RW_WRITER
);
2027 tx
= dmu_tx_create(zfsvfs
->z_os
);
2028 dmu_tx_hold_zap(tx
, dzp
->z_id
, FALSE
, name
);
2029 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
2030 dmu_tx_hold_zap(tx
, zfsvfs
->z_unlinkedobj
, FALSE
, NULL
);
2031 zfs_sa_upgrade_txholds(tx
, zp
);
2032 zfs_sa_upgrade_txholds(tx
, dzp
);
2033 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
2035 rw_exit(&zp
->z_parent_lock
);
2036 rw_exit(&zp
->z_name_lock
);
2037 zfs_dirent_unlock(dl
);
2039 if (error
== ERESTART
) {
2049 error
= zfs_link_destroy(dl
, zp
, tx
, zflg
, NULL
);
2052 uint64_t txtype
= TX_RMDIR
;
2053 if (flags
& FIGNORECASE
)
2055 zfs_log_remove(zilog
, tx
, txtype
, dzp
, name
, ZFS_NO_OBJECT
);
2060 rw_exit(&zp
->z_parent_lock
);
2061 rw_exit(&zp
->z_name_lock
);
2063 zfs_dirent_unlock(dl
);
2067 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
2068 zil_commit(zilog
, 0);
2075 * Read as many directory entries as will fit into the provided
2076 * buffer from the given directory cursor position (specified in
2077 * the uio structure.
2079 * IN: vp - vnode of directory to read.
2080 * uio - structure supplying read location, range info,
2081 * and return buffer.
2082 * cr - credentials of caller.
2083 * ct - caller context
2084 * flags - case flags
2086 * OUT: uio - updated offset and range, buffer filled.
2087 * eofp - set to true if end-of-file detected.
2089 * RETURN: 0 if success
2090 * error code if failure
2093 * vp - atime updated
2095 * Note that the low 4 bits of the cookie returned by zap is always zero.
2096 * This allows us to use the low range for "special" directory entries:
2097 * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem,
2098 * we use the offset 2 for the '.zfs' directory.
2102 zfs_readdir(vnode_t
*vp
, uio_t
*uio
, cred_t
*cr
, int *eofp
,
2103 caller_context_t
*ct
, int flags
)
2105 znode_t
*zp
= VTOZ(vp
);
2109 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
2114 zap_attribute_t zap
;
2115 uint_t bytes_wanted
;
2116 uint64_t offset
; /* must be unsigned; checks for < 1 */
2122 boolean_t check_sysattrs
;
2127 if ((error
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_PARENT(zfsvfs
),
2128 &parent
, sizeof (parent
))) != 0) {
2134 * If we are not given an eof variable,
2141 * Check for valid iov_len.
2143 if (uio
->uio_iov
->iov_len
<= 0) {
2149 * Quit if directory has been removed (posix)
2151 if ((*eofp
= zp
->z_unlinked
) != 0) {
2158 offset
= uio
->uio_loffset
;
2159 prefetch
= zp
->z_zn_prefetch
;
2162 * Initialize the iterator cursor.
2166 * Start iteration from the beginning of the directory.
2168 zap_cursor_init(&zc
, os
, zp
->z_id
);
2171 * The offset is a serialized cursor.
2173 zap_cursor_init_serialized(&zc
, os
, zp
->z_id
, offset
);
2177 * Get space to change directory entries into fs independent format.
2179 iovp
= uio
->uio_iov
;
2180 bytes_wanted
= iovp
->iov_len
;
2181 if (uio
->uio_segflg
!= UIO_SYSSPACE
|| uio
->uio_iovcnt
!= 1) {
2182 bufsize
= bytes_wanted
;
2183 outbuf
= kmem_alloc(bufsize
, KM_SLEEP
);
2184 odp
= (struct dirent64
*)outbuf
;
2186 bufsize
= bytes_wanted
;
2187 odp
= (struct dirent64
*)iovp
->iov_base
;
2189 eodp
= (struct edirent
*)odp
;
2192 * If this VFS supports the system attribute view interface; and
2193 * we're looking at an extended attribute directory; and we care
2194 * about normalization conflicts on this vfs; then we must check
2195 * for normalization conflicts with the sysattr name space.
2197 check_sysattrs
= vfs_has_feature(vp
->v_vfsp
, VFSFT_SYSATTR_VIEWS
) &&
2198 (vp
->v_flag
& V_XATTRDIR
) && zfsvfs
->z_norm
&&
2199 (flags
& V_RDDIR_ENTFLAGS
);
2202 * Transform to file-system independent format
2205 while (outcount
< bytes_wanted
) {
2208 off64_t
*next
= NULL
;
2211 * Special case `.', `..', and `.zfs'.
2214 (void) strcpy(zap
.za_name
, ".");
2215 zap
.za_normalization_conflict
= 0;
2217 } else if (offset
== 1) {
2218 (void) strcpy(zap
.za_name
, "..");
2219 zap
.za_normalization_conflict
= 0;
2221 } else if (offset
== 2 && zfs_show_ctldir(zp
)) {
2222 (void) strcpy(zap
.za_name
, ZFS_CTLDIR_NAME
);
2223 zap
.za_normalization_conflict
= 0;
2224 objnum
= ZFSCTL_INO_ROOT
;
2229 if (error
= zap_cursor_retrieve(&zc
, &zap
)) {
2230 if ((*eofp
= (error
== ENOENT
)) != 0)
2236 if (zap
.za_integer_length
!= 8 ||
2237 zap
.za_num_integers
!= 1) {
2238 cmn_err(CE_WARN
, "zap_readdir: bad directory "
2239 "entry, obj = %lld, offset = %lld\n",
2240 (u_longlong_t
)zp
->z_id
,
2241 (u_longlong_t
)offset
);
2246 objnum
= ZFS_DIRENT_OBJ(zap
.za_first_integer
);
2248 * MacOS X can extract the object type here such as:
2249 * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer);
2252 if (check_sysattrs
&& !zap
.za_normalization_conflict
) {
2253 zap
.za_normalization_conflict
=
2254 xattr_sysattr_casechk(zap
.za_name
);
2258 if (flags
& V_RDDIR_ACCFILTER
) {
2260 * If we have no access at all, don't include
2261 * this entry in the returned information
2264 if (zfs_zget(zp
->z_zfsvfs
, objnum
, &ezp
) != 0)
2266 if (!zfs_has_access(ezp
, cr
)) {
2273 if (flags
& V_RDDIR_ENTFLAGS
)
2274 reclen
= EDIRENT_RECLEN(strlen(zap
.za_name
));
2276 reclen
= DIRENT64_RECLEN(strlen(zap
.za_name
));
2279 * Will this entry fit in the buffer?
2281 if (outcount
+ reclen
> bufsize
) {
2283 * Did we manage to fit anything in the buffer?
2291 if (flags
& V_RDDIR_ENTFLAGS
) {
2293 * Add extended flag entry:
2295 eodp
->ed_ino
= objnum
;
2296 eodp
->ed_reclen
= reclen
;
2297 /* NOTE: ed_off is the offset for the *next* entry */
2298 next
= &(eodp
->ed_off
);
2299 eodp
->ed_eflags
= zap
.za_normalization_conflict
?
2300 ED_CASE_CONFLICT
: 0;
2301 (void) strncpy(eodp
->ed_name
, zap
.za_name
,
2302 EDIRENT_NAMELEN(reclen
));
2303 eodp
= (edirent_t
*)((intptr_t)eodp
+ reclen
);
2308 odp
->d_ino
= objnum
;
2309 odp
->d_reclen
= reclen
;
2310 /* NOTE: d_off is the offset for the *next* entry */
2311 next
= &(odp
->d_off
);
2312 (void) strncpy(odp
->d_name
, zap
.za_name
,
2313 DIRENT64_NAMELEN(reclen
));
2314 odp
= (dirent64_t
*)((intptr_t)odp
+ reclen
);
2318 ASSERT(outcount
<= bufsize
);
2320 /* Prefetch znode */
2322 dmu_prefetch(os
, objnum
, 0, 0);
2326 * Move to the next entry, fill in the previous offset.
2328 if (offset
> 2 || (offset
== 2 && !zfs_show_ctldir(zp
))) {
2329 zap_cursor_advance(&zc
);
2330 offset
= zap_cursor_serialize(&zc
);
2337 zp
->z_zn_prefetch
= B_FALSE
; /* a lookup will re-enable pre-fetching */
2339 if (uio
->uio_segflg
== UIO_SYSSPACE
&& uio
->uio_iovcnt
== 1) {
2340 iovp
->iov_base
+= outcount
;
2341 iovp
->iov_len
-= outcount
;
2342 uio
->uio_resid
-= outcount
;
2343 } else if (error
= uiomove(outbuf
, (long)outcount
, UIO_READ
, uio
)) {
2345 * Reset the pointer.
2347 offset
= uio
->uio_loffset
;
2351 zap_cursor_fini(&zc
);
2352 if (uio
->uio_segflg
!= UIO_SYSSPACE
|| uio
->uio_iovcnt
!= 1)
2353 kmem_free(outbuf
, bufsize
);
2355 if (error
== ENOENT
)
2358 ZFS_ACCESSTIME_STAMP(zfsvfs
, zp
);
2360 uio
->uio_loffset
= offset
;
2365 ulong_t zfs_fsync_sync_cnt
= 4;
2368 zfs_fsync(vnode_t
*vp
, int syncflag
, cred_t
*cr
, caller_context_t
*ct
)
2370 znode_t
*zp
= VTOZ(vp
);
2371 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
2374 * Regardless of whether this is required for standards conformance,
2375 * this is the logical behavior when fsync() is called on a file with
2376 * dirty pages. We use B_ASYNC since the ZIL transactions are already
2377 * going to be pushed out as part of the zil_commit().
2379 if (vn_has_cached_data(vp
) && !(syncflag
& FNODSYNC
) &&
2380 (vp
->v_type
== VREG
) && !(IS_SWAPVP(vp
)))
2381 (void) VOP_PUTPAGE(vp
, (offset_t
)0, (size_t)0, B_ASYNC
, cr
, ct
);
2383 (void) tsd_set(zfs_fsyncer_key
, (void *)zfs_fsync_sync_cnt
);
2385 if (zfsvfs
->z_os
->os_sync
!= ZFS_SYNC_DISABLED
) {
2388 zil_commit(zfsvfs
->z_log
, zp
->z_id
);
2396 * Get the requested file attributes and place them in the provided
2399 * IN: vp - vnode of file.
2400 * vap - va_mask identifies requested attributes.
2401 * If AT_XVATTR set, then optional attrs are requested
2402 * flags - ATTR_NOACLCHECK (CIFS server context)
2403 * cr - credentials of caller.
2404 * ct - caller context
2406 * OUT: vap - attribute values.
2408 * RETURN: 0 (always succeeds)
2412 zfs_getattr(vnode_t
*vp
, vattr_t
*vap
, int flags
, cred_t
*cr
,
2413 caller_context_t
*ct
)
2415 znode_t
*zp
= VTOZ(vp
);
2416 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
2419 uint64_t mtime
[2], ctime
[2];
2420 xvattr_t
*xvap
= (xvattr_t
*)vap
; /* vap may be an xvattr_t * */
2421 xoptattr_t
*xoap
= NULL
;
2422 boolean_t skipaclchk
= (flags
& ATTR_NOACLCHECK
) ? B_TRUE
: B_FALSE
;
2423 sa_bulk_attr_t bulk
[2];
2429 zfs_fuid_map_ids(zp
, cr
, &vap
->va_uid
, &vap
->va_gid
);
2431 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
, &mtime
, 16);
2432 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
, &ctime
, 16);
2434 if ((error
= sa_bulk_lookup(zp
->z_sa_hdl
, bulk
, count
)) != 0) {
2440 * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES.
2441 * Also, if we are the owner don't bother, since owner should
2442 * always be allowed to read basic attributes of file.
2444 if (!(zp
->z_pflags
& ZFS_ACL_TRIVIAL
) &&
2445 (vap
->va_uid
!= crgetuid(cr
))) {
2446 if ((error
= zfs_zaccess(zp
, ACE_READ_ATTRIBUTES
, 0,
2454 * Return all attributes. It's cheaper to provide the answer
2455 * than to determine whether we were asked the question.
2458 mutex_enter(&zp
->z_lock
);
2459 vap
->va_type
= vp
->v_type
;
2460 vap
->va_mode
= zp
->z_mode
& MODEMASK
;
2461 vap
->va_fsid
= zp
->z_zfsvfs
->z_vfs
->vfs_dev
;
2462 vap
->va_nodeid
= zp
->z_id
;
2463 if ((vp
->v_flag
& VROOT
) && zfs_show_ctldir(zp
))
2464 links
= zp
->z_links
+ 1;
2466 links
= zp
->z_links
;
2467 vap
->va_nlink
= MIN(links
, UINT32_MAX
); /* nlink_t limit! */
2468 vap
->va_size
= zp
->z_size
;
2469 vap
->va_rdev
= vp
->v_rdev
;
2470 vap
->va_seq
= zp
->z_seq
;
2473 * Add in any requested optional attributes and the create time.
2474 * Also set the corresponding bits in the returned attribute bitmap.
2476 if ((xoap
= xva_getxoptattr(xvap
)) != NULL
&& zfsvfs
->z_use_fuids
) {
2477 if (XVA_ISSET_REQ(xvap
, XAT_ARCHIVE
)) {
2479 ((zp
->z_pflags
& ZFS_ARCHIVE
) != 0);
2480 XVA_SET_RTN(xvap
, XAT_ARCHIVE
);
2483 if (XVA_ISSET_REQ(xvap
, XAT_READONLY
)) {
2484 xoap
->xoa_readonly
=
2485 ((zp
->z_pflags
& ZFS_READONLY
) != 0);
2486 XVA_SET_RTN(xvap
, XAT_READONLY
);
2489 if (XVA_ISSET_REQ(xvap
, XAT_SYSTEM
)) {
2491 ((zp
->z_pflags
& ZFS_SYSTEM
) != 0);
2492 XVA_SET_RTN(xvap
, XAT_SYSTEM
);
2495 if (XVA_ISSET_REQ(xvap
, XAT_HIDDEN
)) {
2497 ((zp
->z_pflags
& ZFS_HIDDEN
) != 0);
2498 XVA_SET_RTN(xvap
, XAT_HIDDEN
);
2501 if (XVA_ISSET_REQ(xvap
, XAT_NOUNLINK
)) {
2502 xoap
->xoa_nounlink
=
2503 ((zp
->z_pflags
& ZFS_NOUNLINK
) != 0);
2504 XVA_SET_RTN(xvap
, XAT_NOUNLINK
);
2507 if (XVA_ISSET_REQ(xvap
, XAT_IMMUTABLE
)) {
2508 xoap
->xoa_immutable
=
2509 ((zp
->z_pflags
& ZFS_IMMUTABLE
) != 0);
2510 XVA_SET_RTN(xvap
, XAT_IMMUTABLE
);
2513 if (XVA_ISSET_REQ(xvap
, XAT_APPENDONLY
)) {
2514 xoap
->xoa_appendonly
=
2515 ((zp
->z_pflags
& ZFS_APPENDONLY
) != 0);
2516 XVA_SET_RTN(xvap
, XAT_APPENDONLY
);
2519 if (XVA_ISSET_REQ(xvap
, XAT_NODUMP
)) {
2521 ((zp
->z_pflags
& ZFS_NODUMP
) != 0);
2522 XVA_SET_RTN(xvap
, XAT_NODUMP
);
2525 if (XVA_ISSET_REQ(xvap
, XAT_OPAQUE
)) {
2527 ((zp
->z_pflags
& ZFS_OPAQUE
) != 0);
2528 XVA_SET_RTN(xvap
, XAT_OPAQUE
);
2531 if (XVA_ISSET_REQ(xvap
, XAT_AV_QUARANTINED
)) {
2532 xoap
->xoa_av_quarantined
=
2533 ((zp
->z_pflags
& ZFS_AV_QUARANTINED
) != 0);
2534 XVA_SET_RTN(xvap
, XAT_AV_QUARANTINED
);
2537 if (XVA_ISSET_REQ(xvap
, XAT_AV_MODIFIED
)) {
2538 xoap
->xoa_av_modified
=
2539 ((zp
->z_pflags
& ZFS_AV_MODIFIED
) != 0);
2540 XVA_SET_RTN(xvap
, XAT_AV_MODIFIED
);
2543 if (XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
) &&
2544 vp
->v_type
== VREG
) {
2545 zfs_sa_get_scanstamp(zp
, xvap
);
2548 if (XVA_ISSET_REQ(xvap
, XAT_CREATETIME
)) {
2551 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_CRTIME(zfsvfs
),
2552 times
, sizeof (times
));
2553 ZFS_TIME_DECODE(&xoap
->xoa_createtime
, times
);
2554 XVA_SET_RTN(xvap
, XAT_CREATETIME
);
2557 if (XVA_ISSET_REQ(xvap
, XAT_REPARSE
)) {
2558 xoap
->xoa_reparse
= ((zp
->z_pflags
& ZFS_REPARSE
) != 0);
2559 XVA_SET_RTN(xvap
, XAT_REPARSE
);
2561 if (XVA_ISSET_REQ(xvap
, XAT_GEN
)) {
2562 xoap
->xoa_generation
= zp
->z_gen
;
2563 XVA_SET_RTN(xvap
, XAT_GEN
);
2566 if (XVA_ISSET_REQ(xvap
, XAT_OFFLINE
)) {
2568 ((zp
->z_pflags
& ZFS_OFFLINE
) != 0);
2569 XVA_SET_RTN(xvap
, XAT_OFFLINE
);
2572 if (XVA_ISSET_REQ(xvap
, XAT_SPARSE
)) {
2574 ((zp
->z_pflags
& ZFS_SPARSE
) != 0);
2575 XVA_SET_RTN(xvap
, XAT_SPARSE
);
2579 ZFS_TIME_DECODE(&vap
->va_atime
, zp
->z_atime
);
2580 ZFS_TIME_DECODE(&vap
->va_mtime
, mtime
);
2581 ZFS_TIME_DECODE(&vap
->va_ctime
, ctime
);
2583 mutex_exit(&zp
->z_lock
);
2585 sa_object_size(zp
->z_sa_hdl
, &vap
->va_blksize
, &vap
->va_nblocks
);
2587 if (zp
->z_blksz
== 0) {
2589 * Block size hasn't been set; suggest maximal I/O transfers.
2591 vap
->va_blksize
= zfsvfs
->z_max_blksz
;
2599 * Set the file attributes to the values contained in the
2602 * IN: vp - vnode of file to be modified.
2603 * vap - new attribute values.
2604 * If AT_XVATTR set, then optional attrs are being set
2605 * flags - ATTR_UTIME set if non-default time values provided.
2606 * - ATTR_NOACLCHECK (CIFS context only).
2607 * cr - credentials of caller.
2608 * ct - caller context
2610 * RETURN: 0 if success
2611 * error code if failure
2614 * vp - ctime updated, mtime updated if size changed.
2618 zfs_setattr(vnode_t
*vp
, vattr_t
*vap
, int flags
, cred_t
*cr
,
2619 caller_context_t
*ct
)
2621 znode_t
*zp
= VTOZ(vp
);
2622 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
2627 uint_t mask
= vap
->va_mask
;
2631 uint64_t new_uid
, new_gid
;
2633 uint64_t mtime
[2], ctime
[2];
2635 int need_policy
= FALSE
;
2637 zfs_fuid_info_t
*fuidp
= NULL
;
2638 xvattr_t
*xvap
= (xvattr_t
*)vap
; /* vap may be an xvattr_t * */
2641 boolean_t skipaclchk
= (flags
& ATTR_NOACLCHECK
) ? B_TRUE
: B_FALSE
;
2642 boolean_t fuid_dirtied
= B_FALSE
;
2643 sa_bulk_attr_t bulk
[7], xattr_bulk
[7];
2644 int count
= 0, xattr_count
= 0;
2649 if (mask
& AT_NOSET
)
2655 zilog
= zfsvfs
->z_log
;
2658 * Make sure that if we have ephemeral uid/gid or xvattr specified
2659 * that file system is at proper version level
2662 if (zfsvfs
->z_use_fuids
== B_FALSE
&&
2663 (((mask
& AT_UID
) && IS_EPHEMERAL(vap
->va_uid
)) ||
2664 ((mask
& AT_GID
) && IS_EPHEMERAL(vap
->va_gid
)) ||
2665 (mask
& AT_XVATTR
))) {
2670 if (mask
& AT_SIZE
&& vp
->v_type
== VDIR
) {
2675 if (mask
& AT_SIZE
&& vp
->v_type
!= VREG
&& vp
->v_type
!= VFIFO
) {
2681 * If this is an xvattr_t, then get a pointer to the structure of
2682 * optional attributes. If this is NULL, then we have a vattr_t.
2684 xoap
= xva_getxoptattr(xvap
);
2686 xva_init(&tmpxvattr
);
2689 * Immutable files can only alter immutable bit and atime
2691 if ((zp
->z_pflags
& ZFS_IMMUTABLE
) &&
2692 ((mask
& (AT_SIZE
|AT_UID
|AT_GID
|AT_MTIME
|AT_MODE
)) ||
2693 ((mask
& AT_XVATTR
) && XVA_ISSET_REQ(xvap
, XAT_CREATETIME
)))) {
2698 if ((mask
& AT_SIZE
) && (zp
->z_pflags
& ZFS_READONLY
)) {
2704 * Verify timestamps doesn't overflow 32 bits.
2705 * ZFS can handle large timestamps, but 32bit syscalls can't
2706 * handle times greater than 2039. This check should be removed
2707 * once large timestamps are fully supported.
2709 if (mask
& (AT_ATIME
| AT_MTIME
)) {
2710 if (((mask
& AT_ATIME
) && TIMESPEC_OVERFLOW(&vap
->va_atime
)) ||
2711 ((mask
& AT_MTIME
) && TIMESPEC_OVERFLOW(&vap
->va_mtime
))) {
2721 /* Can this be moved to before the top label? */
2722 if (zfsvfs
->z_vfs
->vfs_flag
& VFS_RDONLY
) {
2728 * First validate permissions
2731 if (mask
& AT_SIZE
) {
2732 err
= zfs_zaccess(zp
, ACE_WRITE_DATA
, 0, skipaclchk
, cr
);
2738 * XXX - Note, we are not providing any open
2739 * mode flags here (like FNDELAY), so we may
2740 * block if there are locks present... this
2741 * should be addressed in openat().
2743 /* XXX - would it be OK to generate a log record here? */
2744 err
= zfs_freesp(zp
, vap
->va_size
, 0, 0, FALSE
);
2751 if (mask
& (AT_ATIME
|AT_MTIME
) ||
2752 ((mask
& AT_XVATTR
) && (XVA_ISSET_REQ(xvap
, XAT_HIDDEN
) ||
2753 XVA_ISSET_REQ(xvap
, XAT_READONLY
) ||
2754 XVA_ISSET_REQ(xvap
, XAT_ARCHIVE
) ||
2755 XVA_ISSET_REQ(xvap
, XAT_OFFLINE
) ||
2756 XVA_ISSET_REQ(xvap
, XAT_SPARSE
) ||
2757 XVA_ISSET_REQ(xvap
, XAT_CREATETIME
) ||
2758 XVA_ISSET_REQ(xvap
, XAT_SYSTEM
)))) {
2759 need_policy
= zfs_zaccess(zp
, ACE_WRITE_ATTRIBUTES
, 0,
2763 if (mask
& (AT_UID
|AT_GID
)) {
2764 int idmask
= (mask
& (AT_UID
|AT_GID
));
2769 * NOTE: even if a new mode is being set,
2770 * we may clear S_ISUID/S_ISGID bits.
2773 if (!(mask
& AT_MODE
))
2774 vap
->va_mode
= zp
->z_mode
;
2777 * Take ownership or chgrp to group we are a member of
2780 take_owner
= (mask
& AT_UID
) && (vap
->va_uid
== crgetuid(cr
));
2781 take_group
= (mask
& AT_GID
) &&
2782 zfs_groupmember(zfsvfs
, vap
->va_gid
, cr
);
2785 * If both AT_UID and AT_GID are set then take_owner and
2786 * take_group must both be set in order to allow taking
2789 * Otherwise, send the check through secpolicy_vnode_setattr()
2793 if (((idmask
== (AT_UID
|AT_GID
)) && take_owner
&& take_group
) ||
2794 ((idmask
== AT_UID
) && take_owner
) ||
2795 ((idmask
== AT_GID
) && take_group
)) {
2796 if (zfs_zaccess(zp
, ACE_WRITE_OWNER
, 0,
2797 skipaclchk
, cr
) == 0) {
2799 * Remove setuid/setgid for non-privileged users
2801 secpolicy_setid_clear(vap
, cr
);
2802 trim_mask
= (mask
& (AT_UID
|AT_GID
));
2811 mutex_enter(&zp
->z_lock
);
2812 oldva
.va_mode
= zp
->z_mode
;
2813 zfs_fuid_map_ids(zp
, cr
, &oldva
.va_uid
, &oldva
.va_gid
);
2814 if (mask
& AT_XVATTR
) {
2816 * Update xvattr mask to include only those attributes
2817 * that are actually changing.
2819 * the bits will be restored prior to actually setting
2820 * the attributes so the caller thinks they were set.
2822 if (XVA_ISSET_REQ(xvap
, XAT_APPENDONLY
)) {
2823 if (xoap
->xoa_appendonly
!=
2824 ((zp
->z_pflags
& ZFS_APPENDONLY
) != 0)) {
2827 XVA_CLR_REQ(xvap
, XAT_APPENDONLY
);
2828 XVA_SET_REQ(&tmpxvattr
, XAT_APPENDONLY
);
2832 if (XVA_ISSET_REQ(xvap
, XAT_NOUNLINK
)) {
2833 if (xoap
->xoa_nounlink
!=
2834 ((zp
->z_pflags
& ZFS_NOUNLINK
) != 0)) {
2837 XVA_CLR_REQ(xvap
, XAT_NOUNLINK
);
2838 XVA_SET_REQ(&tmpxvattr
, XAT_NOUNLINK
);
2842 if (XVA_ISSET_REQ(xvap
, XAT_IMMUTABLE
)) {
2843 if (xoap
->xoa_immutable
!=
2844 ((zp
->z_pflags
& ZFS_IMMUTABLE
) != 0)) {
2847 XVA_CLR_REQ(xvap
, XAT_IMMUTABLE
);
2848 XVA_SET_REQ(&tmpxvattr
, XAT_IMMUTABLE
);
2852 if (XVA_ISSET_REQ(xvap
, XAT_NODUMP
)) {
2853 if (xoap
->xoa_nodump
!=
2854 ((zp
->z_pflags
& ZFS_NODUMP
) != 0)) {
2857 XVA_CLR_REQ(xvap
, XAT_NODUMP
);
2858 XVA_SET_REQ(&tmpxvattr
, XAT_NODUMP
);
2862 if (XVA_ISSET_REQ(xvap
, XAT_AV_MODIFIED
)) {
2863 if (xoap
->xoa_av_modified
!=
2864 ((zp
->z_pflags
& ZFS_AV_MODIFIED
) != 0)) {
2867 XVA_CLR_REQ(xvap
, XAT_AV_MODIFIED
);
2868 XVA_SET_REQ(&tmpxvattr
, XAT_AV_MODIFIED
);
2872 if (XVA_ISSET_REQ(xvap
, XAT_AV_QUARANTINED
)) {
2873 if ((vp
->v_type
!= VREG
&&
2874 xoap
->xoa_av_quarantined
) ||
2875 xoap
->xoa_av_quarantined
!=
2876 ((zp
->z_pflags
& ZFS_AV_QUARANTINED
) != 0)) {
2879 XVA_CLR_REQ(xvap
, XAT_AV_QUARANTINED
);
2880 XVA_SET_REQ(&tmpxvattr
, XAT_AV_QUARANTINED
);
2884 if (XVA_ISSET_REQ(xvap
, XAT_REPARSE
)) {
2885 mutex_exit(&zp
->z_lock
);
2890 if (need_policy
== FALSE
&&
2891 (XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
) ||
2892 XVA_ISSET_REQ(xvap
, XAT_OPAQUE
))) {
2897 mutex_exit(&zp
->z_lock
);
2899 if (mask
& AT_MODE
) {
2900 if (zfs_zaccess(zp
, ACE_WRITE_ACL
, 0, skipaclchk
, cr
) == 0) {
2901 err
= secpolicy_setid_setsticky_clear(vp
, vap
,
2907 trim_mask
|= AT_MODE
;
2915 * If trim_mask is set then take ownership
2916 * has been granted or write_acl is present and user
2917 * has the ability to modify mode. In that case remove
2918 * UID|GID and or MODE from mask so that
2919 * secpolicy_vnode_setattr() doesn't revoke it.
2923 saved_mask
= vap
->va_mask
;
2924 vap
->va_mask
&= ~trim_mask
;
2926 err
= secpolicy_vnode_setattr(cr
, vp
, vap
, &oldva
, flags
,
2927 (int (*)(void *, int, cred_t
*))zfs_zaccess_unix
, zp
);
2934 vap
->va_mask
|= saved_mask
;
2938 * secpolicy_vnode_setattr, or take ownership may have
2941 mask
= vap
->va_mask
;
2943 if ((mask
& (AT_UID
| AT_GID
))) {
2944 err
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_XATTR(zfsvfs
),
2945 &xattr_obj
, sizeof (xattr_obj
));
2947 if (err
== 0 && xattr_obj
) {
2948 err
= zfs_zget(zp
->z_zfsvfs
, xattr_obj
, &attrzp
);
2952 if (mask
& AT_UID
) {
2953 new_uid
= zfs_fuid_create(zfsvfs
,
2954 (uint64_t)vap
->va_uid
, cr
, ZFS_OWNER
, &fuidp
);
2955 if (new_uid
!= zp
->z_uid
&&
2956 zfs_fuid_overquota(zfsvfs
, B_FALSE
, new_uid
)) {
2958 VN_RELE(ZTOV(attrzp
));
2964 if (mask
& AT_GID
) {
2965 new_gid
= zfs_fuid_create(zfsvfs
, (uint64_t)vap
->va_gid
,
2966 cr
, ZFS_GROUP
, &fuidp
);
2967 if (new_gid
!= zp
->z_gid
&&
2968 zfs_fuid_overquota(zfsvfs
, B_TRUE
, new_gid
)) {
2970 VN_RELE(ZTOV(attrzp
));
2976 tx
= dmu_tx_create(zfsvfs
->z_os
);
2978 if (mask
& AT_MODE
) {
2979 uint64_t pmode
= zp
->z_mode
;
2981 new_mode
= (pmode
& S_IFMT
) | (vap
->va_mode
& ~S_IFMT
);
2983 zfs_acl_chmod_setattr(zp
, &aclp
, new_mode
);
2985 mutex_enter(&zp
->z_lock
);
2986 if (!zp
->z_is_sa
&& ((acl_obj
= zfs_external_acl(zp
)) != 0)) {
2988 * Are we upgrading ACL from old V0 format
2991 if (zfsvfs
->z_version
>= ZPL_VERSION_FUID
&&
2992 zfs_znode_acl_version(zp
) ==
2993 ZFS_ACL_VERSION_INITIAL
) {
2994 dmu_tx_hold_free(tx
, acl_obj
, 0,
2996 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
,
2997 0, aclp
->z_acl_bytes
);
2999 dmu_tx_hold_write(tx
, acl_obj
, 0,
3002 } else if (!zp
->z_is_sa
&& aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
3003 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
,
3004 0, aclp
->z_acl_bytes
);
3006 mutex_exit(&zp
->z_lock
);
3007 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_TRUE
);
3009 if ((mask
& AT_XVATTR
) &&
3010 XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
))
3011 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_TRUE
);
3013 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
3017 dmu_tx_hold_sa(tx
, attrzp
->z_sa_hdl
, B_FALSE
);
3020 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
3022 zfs_fuid_txhold(zfsvfs
, tx
);
3024 zfs_sa_upgrade_txholds(tx
, zp
);
3026 err
= dmu_tx_assign(tx
, TXG_NOWAIT
);
3028 if (err
== ERESTART
)
3035 * Set each attribute requested.
3036 * We group settings according to the locks they need to acquire.
3038 * Note: you cannot set ctime directly, although it will be
3039 * updated as a side-effect of calling this function.
3043 if (mask
& (AT_UID
|AT_GID
|AT_MODE
))
3044 mutex_enter(&zp
->z_acl_lock
);
3045 mutex_enter(&zp
->z_lock
);
3047 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
), NULL
,
3048 &zp
->z_pflags
, sizeof (zp
->z_pflags
));
3051 if (mask
& (AT_UID
|AT_GID
|AT_MODE
))
3052 mutex_enter(&attrzp
->z_acl_lock
);
3053 mutex_enter(&attrzp
->z_lock
);
3054 SA_ADD_BULK_ATTR(xattr_bulk
, xattr_count
,
3055 SA_ZPL_FLAGS(zfsvfs
), NULL
, &attrzp
->z_pflags
,
3056 sizeof (attrzp
->z_pflags
));
3059 if (mask
& (AT_UID
|AT_GID
)) {
3061 if (mask
& AT_UID
) {
3062 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_UID(zfsvfs
), NULL
,
3063 &new_uid
, sizeof (new_uid
));
3064 zp
->z_uid
= new_uid
;
3066 SA_ADD_BULK_ATTR(xattr_bulk
, xattr_count
,
3067 SA_ZPL_UID(zfsvfs
), NULL
, &new_uid
,
3069 attrzp
->z_uid
= new_uid
;
3073 if (mask
& AT_GID
) {
3074 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GID(zfsvfs
),
3075 NULL
, &new_gid
, sizeof (new_gid
));
3076 zp
->z_gid
= new_gid
;
3078 SA_ADD_BULK_ATTR(xattr_bulk
, xattr_count
,
3079 SA_ZPL_GID(zfsvfs
), NULL
, &new_gid
,
3081 attrzp
->z_gid
= new_gid
;
3084 if (!(mask
& AT_MODE
)) {
3085 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MODE(zfsvfs
),
3086 NULL
, &new_mode
, sizeof (new_mode
));
3087 new_mode
= zp
->z_mode
;
3089 err
= zfs_acl_chown_setattr(zp
);
3092 err
= zfs_acl_chown_setattr(attrzp
);
3097 if (mask
& AT_MODE
) {
3098 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MODE(zfsvfs
), NULL
,
3099 &new_mode
, sizeof (new_mode
));
3100 zp
->z_mode
= new_mode
;
3101 ASSERT3U((uintptr_t)aclp
, !=, NULL
);
3102 err
= zfs_aclset_common(zp
, aclp
, cr
, tx
);
3103 ASSERT3U(err
, ==, 0);
3104 if (zp
->z_acl_cached
)
3105 zfs_acl_free(zp
->z_acl_cached
);
3106 zp
->z_acl_cached
= aclp
;
3111 if (mask
& AT_ATIME
) {
3112 ZFS_TIME_ENCODE(&vap
->va_atime
, zp
->z_atime
);
3113 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_ATIME(zfsvfs
), NULL
,
3114 &zp
->z_atime
, sizeof (zp
->z_atime
));
3117 if (mask
& AT_MTIME
) {
3118 ZFS_TIME_ENCODE(&vap
->va_mtime
, mtime
);
3119 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
,
3120 mtime
, sizeof (mtime
));
3123 /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */
3124 if (mask
& AT_SIZE
&& !(mask
& AT_MTIME
)) {
3125 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
),
3126 NULL
, mtime
, sizeof (mtime
));
3127 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
,
3128 &ctime
, sizeof (ctime
));
3129 zfs_tstamp_update_setup(zp
, CONTENT_MODIFIED
, mtime
, ctime
,
3131 } else if (mask
!= 0) {
3132 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
,
3133 &ctime
, sizeof (ctime
));
3134 zfs_tstamp_update_setup(zp
, STATE_CHANGED
, mtime
, ctime
,
3137 SA_ADD_BULK_ATTR(xattr_bulk
, xattr_count
,
3138 SA_ZPL_CTIME(zfsvfs
), NULL
,
3139 &ctime
, sizeof (ctime
));
3140 zfs_tstamp_update_setup(attrzp
, STATE_CHANGED
,
3141 mtime
, ctime
, B_TRUE
);
3145 * Do this after setting timestamps to prevent timestamp
3146 * update from toggling bit
3149 if (xoap
&& (mask
& AT_XVATTR
)) {
3152 * restore trimmed off masks
3153 * so that return masks can be set for caller.
3156 if (XVA_ISSET_REQ(&tmpxvattr
, XAT_APPENDONLY
)) {
3157 XVA_SET_REQ(xvap
, XAT_APPENDONLY
);
3159 if (XVA_ISSET_REQ(&tmpxvattr
, XAT_NOUNLINK
)) {
3160 XVA_SET_REQ(xvap
, XAT_NOUNLINK
);
3162 if (XVA_ISSET_REQ(&tmpxvattr
, XAT_IMMUTABLE
)) {
3163 XVA_SET_REQ(xvap
, XAT_IMMUTABLE
);
3165 if (XVA_ISSET_REQ(&tmpxvattr
, XAT_NODUMP
)) {
3166 XVA_SET_REQ(xvap
, XAT_NODUMP
);
3168 if (XVA_ISSET_REQ(&tmpxvattr
, XAT_AV_MODIFIED
)) {
3169 XVA_SET_REQ(xvap
, XAT_AV_MODIFIED
);
3171 if (XVA_ISSET_REQ(&tmpxvattr
, XAT_AV_QUARANTINED
)) {
3172 XVA_SET_REQ(xvap
, XAT_AV_QUARANTINED
);
3175 if (XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
))
3176 ASSERT(vp
->v_type
== VREG
);
3178 zfs_xvattr_set(zp
, xvap
, tx
);
3182 zfs_fuid_sync(zfsvfs
, tx
);
3185 zfs_log_setattr(zilog
, tx
, TX_SETATTR
, zp
, vap
, mask
, fuidp
);
3187 mutex_exit(&zp
->z_lock
);
3188 if (mask
& (AT_UID
|AT_GID
|AT_MODE
))
3189 mutex_exit(&zp
->z_acl_lock
);
3192 if (mask
& (AT_UID
|AT_GID
|AT_MODE
))
3193 mutex_exit(&attrzp
->z_acl_lock
);
3194 mutex_exit(&attrzp
->z_lock
);
3197 if (err
== 0 && attrzp
) {
3198 err2
= sa_bulk_update(attrzp
->z_sa_hdl
, xattr_bulk
,
3204 VN_RELE(ZTOV(attrzp
));
3209 zfs_fuid_info_free(fuidp
);
3215 if (err
== ERESTART
)
3218 err2
= sa_bulk_update(zp
->z_sa_hdl
, bulk
, count
, tx
);
3223 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
3224 zil_commit(zilog
, 0);
3230 typedef struct zfs_zlock
{
3231 krwlock_t
*zl_rwlock
; /* lock we acquired */
3232 znode_t
*zl_znode
; /* znode we held */
3233 struct zfs_zlock
*zl_next
; /* next in list */
3237 * Drop locks and release vnodes that were held by zfs_rename_lock().
3240 zfs_rename_unlock(zfs_zlock_t
**zlpp
)
3244 while ((zl
= *zlpp
) != NULL
) {
3245 if (zl
->zl_znode
!= NULL
)
3246 VN_RELE(ZTOV(zl
->zl_znode
));
3247 rw_exit(zl
->zl_rwlock
);
3248 *zlpp
= zl
->zl_next
;
3249 kmem_free(zl
, sizeof (*zl
));
3254 * Search back through the directory tree, using the ".." entries.
3255 * Lock each directory in the chain to prevent concurrent renames.
3256 * Fail any attempt to move a directory into one of its own descendants.
3257 * XXX - z_parent_lock can overlap with map or grow locks
3260 zfs_rename_lock(znode_t
*szp
, znode_t
*tdzp
, znode_t
*sdzp
, zfs_zlock_t
**zlpp
)
3264 uint64_t rootid
= zp
->z_zfsvfs
->z_root
;
3265 uint64_t oidp
= zp
->z_id
;
3266 krwlock_t
*rwlp
= &szp
->z_parent_lock
;
3267 krw_t rw
= RW_WRITER
;
3270 * First pass write-locks szp and compares to zp->z_id.
3271 * Later passes read-lock zp and compare to zp->z_parent.
3274 if (!rw_tryenter(rwlp
, rw
)) {
3276 * Another thread is renaming in this path.
3277 * Note that if we are a WRITER, we don't have any
3278 * parent_locks held yet.
3280 if (rw
== RW_READER
&& zp
->z_id
> szp
->z_id
) {
3282 * Drop our locks and restart
3284 zfs_rename_unlock(&zl
);
3288 rwlp
= &szp
->z_parent_lock
;
3293 * Wait for other thread to drop its locks
3299 zl
= kmem_alloc(sizeof (*zl
), KM_SLEEP
);
3300 zl
->zl_rwlock
= rwlp
;
3301 zl
->zl_znode
= NULL
;
3302 zl
->zl_next
= *zlpp
;
3305 if (oidp
== szp
->z_id
) /* We're a descendant of szp */
3308 if (oidp
== rootid
) /* We've hit the top */
3311 if (rw
== RW_READER
) { /* i.e. not the first pass */
3312 int error
= zfs_zget(zp
->z_zfsvfs
, oidp
, &zp
);
3317 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_PARENT(zp
->z_zfsvfs
),
3318 &oidp
, sizeof (oidp
));
3319 rwlp
= &zp
->z_parent_lock
;
3322 } while (zp
->z_id
!= sdzp
->z_id
);
3328 * Move an entry from the provided source directory to the target
3329 * directory. Change the entry name as indicated.
3331 * IN: sdvp - Source directory containing the "old entry".
3332 * snm - Old entry name.
3333 * tdvp - Target directory to contain the "new entry".
3334 * tnm - New entry name.
3335 * cr - credentials of caller.
3336 * ct - caller context
3337 * flags - case flags
3339 * RETURN: 0 if success
3340 * error code if failure
3343 * sdvp,tdvp - ctime|mtime updated
3347 zfs_rename(vnode_t
*sdvp
, char *snm
, vnode_t
*tdvp
, char *tnm
, cred_t
*cr
,
3348 caller_context_t
*ct
, int flags
)
3350 znode_t
*tdzp
, *szp
, *tzp
;
3351 znode_t
*sdzp
= VTOZ(sdvp
);
3352 zfsvfs_t
*zfsvfs
= sdzp
->z_zfsvfs
;
3355 zfs_dirlock_t
*sdl
, *tdl
;
3358 int cmp
, serr
, terr
;
3363 ZFS_VERIFY_ZP(sdzp
);
3364 zilog
= zfsvfs
->z_log
;
3367 * Make sure we have the real vp for the target directory.
3369 if (VOP_REALVP(tdvp
, &realvp
, ct
) == 0)
3372 if (tdvp
->v_vfsp
!= sdvp
->v_vfsp
|| zfsctl_is_node(tdvp
)) {
3378 ZFS_VERIFY_ZP(tdzp
);
3379 if (zfsvfs
->z_utf8
&& u8_validate(tnm
,
3380 strlen(tnm
), NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
3385 if (flags
& FIGNORECASE
)
3394 * This is to prevent the creation of links into attribute space
3395 * by renaming a linked file into/outof an attribute directory.
3396 * See the comment in zfs_link() for why this is considered bad.
3398 if ((tdzp
->z_pflags
& ZFS_XATTR
) != (sdzp
->z_pflags
& ZFS_XATTR
)) {
3404 * Lock source and target directory entries. To prevent deadlock,
3405 * a lock ordering must be defined. We lock the directory with
3406 * the smallest object id first, or if it's a tie, the one with
3407 * the lexically first name.
3409 if (sdzp
->z_id
< tdzp
->z_id
) {
3411 } else if (sdzp
->z_id
> tdzp
->z_id
) {
3415 * First compare the two name arguments without
3416 * considering any case folding.
3418 int nofold
= (zfsvfs
->z_norm
& ~U8_TEXTPREP_TOUPPER
);
3420 cmp
= u8_strcmp(snm
, tnm
, 0, nofold
, U8_UNICODE_LATEST
, &error
);
3421 ASSERT(error
== 0 || !zfsvfs
->z_utf8
);
3424 * POSIX: "If the old argument and the new argument
3425 * both refer to links to the same existing file,
3426 * the rename() function shall return successfully
3427 * and perform no other action."
3433 * If the file system is case-folding, then we may
3434 * have some more checking to do. A case-folding file
3435 * system is either supporting mixed case sensitivity
3436 * access or is completely case-insensitive. Note
3437 * that the file system is always case preserving.
3439 * In mixed sensitivity mode case sensitive behavior
3440 * is the default. FIGNORECASE must be used to
3441 * explicitly request case insensitive behavior.
3443 * If the source and target names provided differ only
3444 * by case (e.g., a request to rename 'tim' to 'Tim'),
3445 * we will treat this as a special case in the
3446 * case-insensitive mode: as long as the source name
3447 * is an exact match, we will allow this to proceed as
3448 * a name-change request.
3450 if ((zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
||
3451 (zfsvfs
->z_case
== ZFS_CASE_MIXED
&&
3452 flags
& FIGNORECASE
)) &&
3453 u8_strcmp(snm
, tnm
, 0, zfsvfs
->z_norm
, U8_UNICODE_LATEST
,
3456 * case preserving rename request, require exact
3465 * If the source and destination directories are the same, we should
3466 * grab the z_name_lock of that directory only once.
3470 rw_enter(&sdzp
->z_name_lock
, RW_READER
);
3474 serr
= zfs_dirent_lock(&sdl
, sdzp
, snm
, &szp
,
3475 ZEXISTS
| zflg
, NULL
, NULL
);
3476 terr
= zfs_dirent_lock(&tdl
,
3477 tdzp
, tnm
, &tzp
, ZRENAMING
| zflg
, NULL
, NULL
);
3479 terr
= zfs_dirent_lock(&tdl
,
3480 tdzp
, tnm
, &tzp
, zflg
, NULL
, NULL
);
3481 serr
= zfs_dirent_lock(&sdl
,
3482 sdzp
, snm
, &szp
, ZEXISTS
| ZRENAMING
| zflg
,
3488 * Source entry invalid or not there.
3491 zfs_dirent_unlock(tdl
);
3497 rw_exit(&sdzp
->z_name_lock
);
3499 if (strcmp(snm
, "..") == 0)
3505 zfs_dirent_unlock(sdl
);
3509 rw_exit(&sdzp
->z_name_lock
);
3511 if (strcmp(tnm
, "..") == 0)
3518 * Must have write access at the source to remove the old entry
3519 * and write access at the target to create the new entry.
3520 * Note that if target and source are the same, this can be
3521 * done in a single check.
3524 if ((error
= zfs_zaccess_rename(sdzp
, szp
, tdzp
, tzp
, cr
)))
3527 if (ZTOV(szp
)->v_type
== VDIR
) {
3529 * Check to make sure rename is valid.
3530 * Can't do a move like this: /usr/a/b to /usr/a/b/c/d
3532 if ((error
= zfs_rename_lock(szp
, tdzp
, sdzp
, &zl
)))
3537 * Does target exist?
3541 * Source and target must be the same type.
3543 if (ZTOV(szp
)->v_type
== VDIR
) {
3544 if (ZTOV(tzp
)->v_type
!= VDIR
) {
3549 if (ZTOV(tzp
)->v_type
== VDIR
) {
3555 * POSIX dictates that when the source and target
3556 * entries refer to the same file object, rename
3557 * must do nothing and exit without error.
3559 if (szp
->z_id
== tzp
->z_id
) {
3565 vnevent_rename_src(ZTOV(szp
), sdvp
, snm
, ct
);
3567 vnevent_rename_dest(ZTOV(tzp
), tdvp
, tnm
, ct
);
3570 * notify the target directory if it is not the same
3571 * as source directory.
3574 vnevent_rename_dest_dir(tdvp
, ct
);
3577 tx
= dmu_tx_create(zfsvfs
->z_os
);
3578 dmu_tx_hold_sa(tx
, szp
->z_sa_hdl
, B_FALSE
);
3579 dmu_tx_hold_sa(tx
, sdzp
->z_sa_hdl
, B_FALSE
);
3580 dmu_tx_hold_zap(tx
, sdzp
->z_id
, FALSE
, snm
);
3581 dmu_tx_hold_zap(tx
, tdzp
->z_id
, TRUE
, tnm
);
3583 dmu_tx_hold_sa(tx
, tdzp
->z_sa_hdl
, B_FALSE
);
3584 zfs_sa_upgrade_txholds(tx
, tdzp
);
3587 dmu_tx_hold_sa(tx
, tzp
->z_sa_hdl
, B_FALSE
);
3588 zfs_sa_upgrade_txholds(tx
, tzp
);
3591 zfs_sa_upgrade_txholds(tx
, szp
);
3592 dmu_tx_hold_zap(tx
, zfsvfs
->z_unlinkedobj
, FALSE
, NULL
);
3593 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
3596 zfs_rename_unlock(&zl
);
3597 zfs_dirent_unlock(sdl
);
3598 zfs_dirent_unlock(tdl
);
3601 rw_exit(&sdzp
->z_name_lock
);
3606 if (error
== ERESTART
) {
3616 if (tzp
) /* Attempt to remove the existing target */
3617 error
= zfs_link_destroy(tdl
, tzp
, tx
, zflg
, NULL
);
3620 error
= zfs_link_create(tdl
, szp
, tx
, ZRENAMING
);
3622 szp
->z_pflags
|= ZFS_AV_MODIFIED
;
3624 error
= sa_update(szp
->z_sa_hdl
, SA_ZPL_FLAGS(zfsvfs
),
3625 (void *)&szp
->z_pflags
, sizeof (uint64_t), tx
);
3626 ASSERT3U(error
, ==, 0);
3628 error
= zfs_link_destroy(sdl
, szp
, tx
, ZRENAMING
, NULL
);
3630 zfs_log_rename(zilog
, tx
, TX_RENAME
|
3631 (flags
& FIGNORECASE
? TX_CI
: 0), sdzp
,
3632 sdl
->dl_name
, tdzp
, tdl
->dl_name
, szp
);
3635 * Update path information for the target vnode
3637 vn_renamepath(tdvp
, ZTOV(szp
), tnm
,
3641 * At this point, we have successfully created
3642 * the target name, but have failed to remove
3643 * the source name. Since the create was done
3644 * with the ZRENAMING flag, there are
3645 * complications; for one, the link count is
3646 * wrong. The easiest way to deal with this
3647 * is to remove the newly created target, and
3648 * return the original error. This must
3649 * succeed; fortunately, it is very unlikely to
3650 * fail, since we just created it.
3652 VERIFY3U(zfs_link_destroy(tdl
, szp
, tx
,
3653 ZRENAMING
, NULL
), ==, 0);
3661 zfs_rename_unlock(&zl
);
3663 zfs_dirent_unlock(sdl
);
3664 zfs_dirent_unlock(tdl
);
3667 rw_exit(&sdzp
->z_name_lock
);
3674 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
3675 zil_commit(zilog
, 0);
3682 * Insert the indicated symbolic reference entry into the directory.
3684 * IN: dvp - Directory to contain new symbolic link.
3685 * link - Name for new symlink entry.
3686 * vap - Attributes of new entry.
3687 * target - Target path of new symlink.
3688 * cr - credentials of caller.
3689 * ct - caller context
3690 * flags - case flags
3692 * RETURN: 0 if success
3693 * error code if failure
3696 * dvp - ctime|mtime updated
3700 zfs_symlink(vnode_t
*dvp
, char *name
, vattr_t
*vap
, char *link
, cred_t
*cr
,
3701 caller_context_t
*ct
, int flags
)
3703 znode_t
*zp
, *dzp
= VTOZ(dvp
);
3706 zfsvfs_t
*zfsvfs
= dzp
->z_zfsvfs
;
3708 uint64_t len
= strlen(link
);
3711 zfs_acl_ids_t acl_ids
;
3712 boolean_t fuid_dirtied
;
3713 uint64_t txtype
= TX_SYMLINK
;
3715 ASSERT(vap
->va_type
== VLNK
);
3719 zilog
= zfsvfs
->z_log
;
3721 if (zfsvfs
->z_utf8
&& u8_validate(name
, strlen(name
),
3722 NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
3726 if (flags
& FIGNORECASE
)
3729 if (len
> MAXPATHLEN
) {
3731 return (ENAMETOOLONG
);
3734 if ((error
= zfs_acl_ids_create(dzp
, 0,
3735 vap
, cr
, NULL
, &acl_ids
)) != 0) {
3741 * Attempt to lock directory; fail if entry already exists.
3743 error
= zfs_dirent_lock(&dl
, dzp
, name
, &zp
, zflg
, NULL
, NULL
);
3745 zfs_acl_ids_free(&acl_ids
);
3750 if ((error
= zfs_zaccess(dzp
, ACE_ADD_FILE
, 0, B_FALSE
, cr
))) {
3751 zfs_acl_ids_free(&acl_ids
);
3752 zfs_dirent_unlock(dl
);
3757 if (zfs_acl_ids_overquota(zfsvfs
, &acl_ids
)) {
3758 zfs_acl_ids_free(&acl_ids
);
3759 zfs_dirent_unlock(dl
);
3763 tx
= dmu_tx_create(zfsvfs
->z_os
);
3764 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
3765 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
, 0, MAX(1, len
));
3766 dmu_tx_hold_zap(tx
, dzp
->z_id
, TRUE
, name
);
3767 dmu_tx_hold_sa_create(tx
, acl_ids
.z_aclp
->z_acl_bytes
+
3768 ZFS_SA_BASE_ATTR_SIZE
+ len
);
3769 dmu_tx_hold_sa(tx
, dzp
->z_sa_hdl
, B_FALSE
);
3770 if (!zfsvfs
->z_use_sa
&& acl_ids
.z_aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
3771 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
, 0,
3772 acl_ids
.z_aclp
->z_acl_bytes
);
3775 zfs_fuid_txhold(zfsvfs
, tx
);
3776 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
3778 zfs_dirent_unlock(dl
);
3779 if (error
== ERESTART
) {
3784 zfs_acl_ids_free(&acl_ids
);
3791 * Create a new object for the symlink.
3792 * for version 4 ZPL datsets the symlink will be an SA attribute
3794 zfs_mknode(dzp
, vap
, tx
, cr
, 0, &zp
, &acl_ids
);
3797 zfs_fuid_sync(zfsvfs
, tx
);
3799 mutex_enter(&zp
->z_lock
);
3801 error
= sa_update(zp
->z_sa_hdl
, SA_ZPL_SYMLINK(zfsvfs
),
3804 zfs_sa_symlink(zp
, link
, len
, tx
);
3805 mutex_exit(&zp
->z_lock
);
3808 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_SIZE(zfsvfs
),
3809 &zp
->z_size
, sizeof (zp
->z_size
), tx
);
3811 * Insert the new object into the directory.
3813 (void) zfs_link_create(dl
, zp
, tx
, ZNEW
);
3815 if (flags
& FIGNORECASE
)
3817 zfs_log_symlink(zilog
, tx
, txtype
, dzp
, zp
, name
, link
);
3819 zfs_acl_ids_free(&acl_ids
);
3823 zfs_dirent_unlock(dl
);
3827 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
3828 zil_commit(zilog
, 0);
3835 * Return, in the buffer contained in the provided uio structure,
3836 * the symbolic path referred to by vp.
3838 * IN: vp - vnode of symbolic link.
3839 * uoip - structure to contain the link path.
3840 * cr - credentials of caller.
3841 * ct - caller context
3843 * OUT: uio - structure to contain the link path.
3845 * RETURN: 0 if success
3846 * error code if failure
3849 * vp - atime updated
3853 zfs_readlink(vnode_t
*vp
, uio_t
*uio
, cred_t
*cr
, caller_context_t
*ct
)
3855 znode_t
*zp
= VTOZ(vp
);
3856 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
3862 mutex_enter(&zp
->z_lock
);
3864 error
= sa_lookup_uio(zp
->z_sa_hdl
,
3865 SA_ZPL_SYMLINK(zfsvfs
), uio
);
3867 error
= zfs_sa_readlink(zp
, uio
);
3868 mutex_exit(&zp
->z_lock
);
3870 ZFS_ACCESSTIME_STAMP(zfsvfs
, zp
);
3877 * Insert a new entry into directory tdvp referencing svp.
3879 * IN: tdvp - Directory to contain new entry.
3880 * svp - vnode of new entry.
3881 * name - name of new entry.
3882 * cr - credentials of caller.
3883 * ct - caller context
3885 * RETURN: 0 if success
3886 * error code if failure
3889 * tdvp - ctime|mtime updated
3890 * svp - ctime updated
3894 zfs_link(vnode_t
*tdvp
, vnode_t
*svp
, char *name
, cred_t
*cr
,
3895 caller_context_t
*ct
, int flags
)
3897 znode_t
*dzp
= VTOZ(tdvp
);
3899 zfsvfs_t
*zfsvfs
= dzp
->z_zfsvfs
;
3909 ASSERT(tdvp
->v_type
== VDIR
);
3913 zilog
= zfsvfs
->z_log
;
3915 if (VOP_REALVP(svp
, &realvp
, ct
) == 0)
3919 * POSIX dictates that we return EPERM here.
3920 * Better choices include ENOTSUP or EISDIR.
3922 if (svp
->v_type
== VDIR
) {
3927 if (svp
->v_vfsp
!= tdvp
->v_vfsp
|| zfsctl_is_node(svp
)) {
3935 /* Prevent links to .zfs/shares files */
3937 if ((error
= sa_lookup(szp
->z_sa_hdl
, SA_ZPL_PARENT(zfsvfs
),
3938 &parent
, sizeof (uint64_t))) != 0) {
3942 if (parent
== zfsvfs
->z_shares_dir
) {
3947 if (zfsvfs
->z_utf8
&& u8_validate(name
,
3948 strlen(name
), NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
3952 if (flags
& FIGNORECASE
)
3956 * We do not support links between attributes and non-attributes
3957 * because of the potential security risk of creating links
3958 * into "normal" file space in order to circumvent restrictions
3959 * imposed in attribute space.
3961 if ((szp
->z_pflags
& ZFS_XATTR
) != (dzp
->z_pflags
& ZFS_XATTR
)) {
3967 owner
= zfs_fuid_map_id(zfsvfs
, szp
->z_uid
, cr
, ZFS_OWNER
);
3968 if (owner
!= crgetuid(cr
) && secpolicy_basic_link(cr
) != 0) {
3973 if ((error
= zfs_zaccess(dzp
, ACE_ADD_FILE
, 0, B_FALSE
, cr
))) {
3980 * Attempt to lock directory; fail if entry already exists.
3982 error
= zfs_dirent_lock(&dl
, dzp
, name
, &tzp
, zf
, NULL
, NULL
);
3988 tx
= dmu_tx_create(zfsvfs
->z_os
);
3989 dmu_tx_hold_sa(tx
, szp
->z_sa_hdl
, B_FALSE
);
3990 dmu_tx_hold_zap(tx
, dzp
->z_id
, TRUE
, name
);
3991 zfs_sa_upgrade_txholds(tx
, szp
);
3992 zfs_sa_upgrade_txholds(tx
, dzp
);
3993 error
= dmu_tx_assign(tx
, TXG_NOWAIT
);
3995 zfs_dirent_unlock(dl
);
3996 if (error
== ERESTART
) {
4006 error
= zfs_link_create(dl
, szp
, tx
, 0);
4009 uint64_t txtype
= TX_LINK
;
4010 if (flags
& FIGNORECASE
)
4012 zfs_log_link(zilog
, tx
, txtype
, dzp
, szp
, name
);
4017 zfs_dirent_unlock(dl
);
4020 vnevent_link(svp
, ct
);
4023 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
4024 zil_commit(zilog
, 0);
4031 * zfs_null_putapage() is used when the file system has been force
4032 * unmounted. It just drops the pages.
4036 zfs_null_putapage(vnode_t
*vp
, page_t
*pp
, u_offset_t
*offp
,
4037 size_t *lenp
, int flags
, cred_t
*cr
)
4039 pvn_write_done(pp
, B_INVAL
|B_FORCE
|B_ERROR
);
4044 * Push a page out to disk, klustering if possible.
4046 * IN: vp - file to push page to.
4047 * pp - page to push.
4048 * flags - additional flags.
4049 * cr - credentials of caller.
4051 * OUT: offp - start of range pushed.
4052 * lenp - len of range pushed.
4054 * RETURN: 0 if success
4055 * error code if failure
4057 * NOTE: callers must have locked the page to be pushed. On
4058 * exit, the page (and all other pages in the kluster) must be
4063 zfs_putapage(vnode_t
*vp
, page_t
*pp
, u_offset_t
*offp
,
4064 size_t *lenp
, int flags
, cred_t
*cr
)
4066 znode_t
*zp
= VTOZ(vp
);
4067 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4069 u_offset_t off
, koff
;
4076 * If our blocksize is bigger than the page size, try to kluster
4077 * multiple pages so that we write a full block (thus avoiding
4078 * a read-modify-write).
4080 if (off
< zp
->z_size
&& zp
->z_blksz
> PAGESIZE
) {
4081 klen
= P2ROUNDUP((ulong_t
)zp
->z_blksz
, PAGESIZE
);
4082 koff
= ISP2(klen
) ? P2ALIGN(off
, (u_offset_t
)klen
) : 0;
4083 ASSERT(koff
<= zp
->z_size
);
4084 if (koff
+ klen
> zp
->z_size
)
4085 klen
= P2ROUNDUP(zp
->z_size
- koff
, (uint64_t)PAGESIZE
);
4086 pp
= pvn_write_kluster(vp
, pp
, &off
, &len
, koff
, klen
, flags
);
4088 ASSERT3U(btop(len
), ==, btopr(len
));
4091 * Can't push pages past end-of-file.
4093 if (off
>= zp
->z_size
) {
4094 /* ignore all pages */
4097 } else if (off
+ len
> zp
->z_size
) {
4098 int npages
= btopr(zp
->z_size
- off
);
4101 page_list_break(&pp
, &trunc
, npages
);
4102 /* ignore pages past end of file */
4104 pvn_write_done(trunc
, flags
);
4105 len
= zp
->z_size
- off
;
4108 if (zfs_owner_overquota(zfsvfs
, zp
, B_FALSE
) ||
4109 zfs_owner_overquota(zfsvfs
, zp
, B_TRUE
)) {
4114 tx
= dmu_tx_create(zfsvfs
->z_os
);
4115 dmu_tx_hold_write(tx
, zp
->z_id
, off
, len
);
4117 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
4118 zfs_sa_upgrade_txholds(tx
, zp
);
4119 err
= dmu_tx_assign(tx
, TXG_NOWAIT
);
4121 if (err
== ERESTART
) {
4130 if (zp
->z_blksz
<= PAGESIZE
) {
4131 caddr_t va
= zfs_map_page(pp
, S_READ
);
4132 ASSERT3U(len
, <=, PAGESIZE
);
4133 dmu_write(zfsvfs
->z_os
, zp
->z_id
, off
, len
, va
, tx
);
4134 zfs_unmap_page(pp
, va
);
4136 err
= dmu_write_pages(zfsvfs
->z_os
, zp
->z_id
, off
, len
, pp
, tx
);
4140 uint64_t mtime
[2], ctime
[2];
4141 sa_bulk_attr_t bulk
[3];
4144 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
,
4146 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
,
4148 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
), NULL
,
4150 zfs_tstamp_update_setup(zp
, CONTENT_MODIFIED
, mtime
, ctime
,
4152 zfs_log_write(zfsvfs
->z_log
, tx
, TX_WRITE
, zp
, off
, len
, 0);
4157 pvn_write_done(pp
, (err
? B_ERROR
: 0) | flags
);
4167 * Copy the portion of the file indicated from pages into the file.
4168 * The pages are stored in a page list attached to the files vnode.
4170 * IN: vp - vnode of file to push page data to.
4171 * off - position in file to put data.
4172 * len - amount of data to write.
4173 * flags - flags to control the operation.
4174 * cr - credentials of caller.
4175 * ct - caller context.
4177 * RETURN: 0 if success
4178 * error code if failure
4181 * vp - ctime|mtime updated
4185 zfs_putpage(vnode_t
*vp
, offset_t off
, size_t len
, int flags
, cred_t
*cr
,
4186 caller_context_t
*ct
)
4188 znode_t
*zp
= VTOZ(vp
);
4189 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4201 * Align this request to the file block size in case we kluster.
4202 * XXX - this can result in pretty aggresive locking, which can
4203 * impact simultanious read/write access. One option might be
4204 * to break up long requests (len == 0) into block-by-block
4205 * operations to get narrower locking.
4207 blksz
= zp
->z_blksz
;
4209 io_off
= P2ALIGN_TYPED(off
, blksz
, u_offset_t
);
4212 if (len
> 0 && ISP2(blksz
))
4213 io_len
= P2ROUNDUP_TYPED(len
+ (off
- io_off
), blksz
, size_t);
4219 * Search the entire vp list for pages >= io_off.
4221 rl
= zfs_range_lock(zp
, io_off
, UINT64_MAX
, RL_WRITER
);
4222 error
= pvn_vplist_dirty(vp
, io_off
, zfs_putapage
, flags
, cr
);
4225 rl
= zfs_range_lock(zp
, io_off
, io_len
, RL_WRITER
);
4227 if (off
> zp
->z_size
) {
4228 /* past end of file */
4229 zfs_range_unlock(rl
);
4234 len
= MIN(io_len
, P2ROUNDUP(zp
->z_size
, PAGESIZE
) - io_off
);
4236 for (off
= io_off
; io_off
< off
+ len
; io_off
+= io_len
) {
4237 if ((flags
& B_INVAL
) || ((flags
& B_ASYNC
) == 0)) {
4238 pp
= page_lookup(vp
, io_off
,
4239 (flags
& (B_INVAL
| B_FREE
)) ? SE_EXCL
: SE_SHARED
);
4241 pp
= page_lookup_nowait(vp
, io_off
,
4242 (flags
& B_FREE
) ? SE_EXCL
: SE_SHARED
);
4245 if (pp
!= NULL
&& pvn_getdirty(pp
, flags
)) {
4249 * Found a dirty page to push
4251 err
= zfs_putapage(vp
, pp
, &io_off
, &io_len
, flags
, cr
);
4259 zfs_range_unlock(rl
);
4260 if ((flags
& B_ASYNC
) == 0 || zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
4261 zil_commit(zfsvfs
->z_log
, zp
->z_id
);
4268 zfs_inactive(vnode_t
*vp
, cred_t
*cr
, caller_context_t
*ct
)
4270 znode_t
*zp
= VTOZ(vp
);
4271 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4274 rw_enter(&zfsvfs
->z_teardown_inactive_lock
, RW_READER
);
4275 if (zp
->z_sa_hdl
== NULL
) {
4277 * The fs has been unmounted, or we did a
4278 * suspend/resume and this file no longer exists.
4280 if (vn_has_cached_data(vp
)) {
4281 (void) pvn_vplist_dirty(vp
, 0, zfs_null_putapage
,
4285 mutex_enter(&zp
->z_lock
);
4286 mutex_enter(&vp
->v_lock
);
4287 ASSERT(vp
->v_count
== 1);
4289 mutex_exit(&vp
->v_lock
);
4290 mutex_exit(&zp
->z_lock
);
4291 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
4297 * Attempt to push any data in the page cache. If this fails
4298 * we will get kicked out later in zfs_zinactive().
4300 if (vn_has_cached_data(vp
)) {
4301 (void) pvn_vplist_dirty(vp
, 0, zfs_putapage
, B_INVAL
|B_ASYNC
,
4305 if (zp
->z_atime_dirty
&& zp
->z_unlinked
== 0) {
4306 dmu_tx_t
*tx
= dmu_tx_create(zfsvfs
->z_os
);
4308 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
4309 zfs_sa_upgrade_txholds(tx
, zp
);
4310 error
= dmu_tx_assign(tx
, TXG_WAIT
);
4314 mutex_enter(&zp
->z_lock
);
4315 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_ATIME(zfsvfs
),
4316 (void *)&zp
->z_atime
, sizeof (zp
->z_atime
), tx
);
4317 zp
->z_atime_dirty
= 0;
4318 mutex_exit(&zp
->z_lock
);
4324 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
4328 * Bounds-check the seek operation.
4330 * IN: vp - vnode seeking within
4331 * ooff - old file offset
4332 * noffp - pointer to new file offset
4333 * ct - caller context
4335 * RETURN: 0 if success
4336 * EINVAL if new offset invalid
4340 zfs_seek(vnode_t
*vp
, offset_t ooff
, offset_t
*noffp
,
4341 caller_context_t
*ct
)
4343 if (vp
->v_type
== VDIR
)
4345 return ((*noffp
< 0 || *noffp
> MAXOFFSET_T
) ? EINVAL
: 0);
4349 * Pre-filter the generic locking function to trap attempts to place
4350 * a mandatory lock on a memory mapped file.
4353 zfs_frlock(vnode_t
*vp
, int cmd
, flock64_t
*bfp
, int flag
, offset_t offset
,
4354 flk_callback_t
*flk_cbp
, cred_t
*cr
, caller_context_t
*ct
)
4356 znode_t
*zp
= VTOZ(vp
);
4357 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4363 * We are following the UFS semantics with respect to mapcnt
4364 * here: If we see that the file is mapped already, then we will
4365 * return an error, but we don't worry about races between this
4366 * function and zfs_map().
4368 if (zp
->z_mapcnt
> 0 && MANDMODE(zp
->z_mode
)) {
4373 return (fs_frlock(vp
, cmd
, bfp
, flag
, offset
, flk_cbp
, cr
, ct
));
4377 * If we can't find a page in the cache, we will create a new page
4378 * and fill it with file data. For efficiency, we may try to fill
4379 * multiple pages at once (klustering) to fill up the supplied page
4380 * list. Note that the pages to be filled are held with an exclusive
4381 * lock to prevent access by other threads while they are being filled.
4384 zfs_fillpage(vnode_t
*vp
, u_offset_t off
, struct seg
*seg
,
4385 caddr_t addr
, page_t
*pl
[], size_t plsz
, enum seg_rw rw
)
4387 znode_t
*zp
= VTOZ(vp
);
4388 page_t
*pp
, *cur_pp
;
4389 objset_t
*os
= zp
->z_zfsvfs
->z_os
;
4390 u_offset_t io_off
, total
;
4394 if (plsz
== PAGESIZE
|| zp
->z_blksz
<= PAGESIZE
) {
4396 * We only have a single page, don't bother klustering
4400 pp
= page_create_va(vp
, io_off
, io_len
,
4401 PG_EXCL
| PG_WAIT
, seg
, addr
);
4404 * Try to find enough pages to fill the page list
4406 pp
= pvn_read_kluster(vp
, off
, seg
, addr
, &io_off
,
4407 &io_len
, off
, plsz
, 0);
4411 * The page already exists, nothing to do here.
4418 * Fill the pages in the kluster.
4421 for (total
= io_off
+ io_len
; io_off
< total
; io_off
+= PAGESIZE
) {
4424 ASSERT3U(io_off
, ==, cur_pp
->p_offset
);
4425 va
= zfs_map_page(cur_pp
, S_WRITE
);
4426 err
= dmu_read(os
, zp
->z_id
, io_off
, PAGESIZE
, va
,
4428 zfs_unmap_page(cur_pp
, va
);
4430 /* On error, toss the entire kluster */
4431 pvn_read_done(pp
, B_ERROR
);
4432 /* convert checksum errors into IO errors */
4437 cur_pp
= cur_pp
->p_next
;
4441 * Fill in the page list array from the kluster starting
4442 * from the desired offset `off'.
4443 * NOTE: the page list will always be null terminated.
4445 pvn_plist_init(pp
, pl
, plsz
, off
, io_len
, rw
);
4446 ASSERT(pl
== NULL
|| (*pl
)->p_offset
== off
);
4452 * Return pointers to the pages for the file region [off, off + len]
4453 * in the pl array. If plsz is greater than len, this function may
4454 * also return page pointers from after the specified region
4455 * (i.e. the region [off, off + plsz]). These additional pages are
4456 * only returned if they are already in the cache, or were created as
4457 * part of a klustered read.
4459 * IN: vp - vnode of file to get data from.
4460 * off - position in file to get data from.
4461 * len - amount of data to retrieve.
4462 * plsz - length of provided page list.
4463 * seg - segment to obtain pages for.
4464 * addr - virtual address of fault.
4465 * rw - mode of created pages.
4466 * cr - credentials of caller.
4467 * ct - caller context.
4469 * OUT: protp - protection mode of created pages.
4470 * pl - list of pages created.
4472 * RETURN: 0 if success
4473 * error code if failure
4476 * vp - atime updated
4480 zfs_getpage(vnode_t
*vp
, offset_t off
, size_t len
, uint_t
*protp
,
4481 page_t
*pl
[], size_t plsz
, struct seg
*seg
, caddr_t addr
,
4482 enum seg_rw rw
, cred_t
*cr
, caller_context_t
*ct
)
4484 znode_t
*zp
= VTOZ(vp
);
4485 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4489 /* we do our own caching, faultahead is unnecessary */
4492 else if (len
> plsz
)
4495 len
= P2ROUNDUP(len
, PAGESIZE
);
4496 ASSERT(plsz
>= len
);
4505 * Loop through the requested range [off, off + len) looking
4506 * for pages. If we don't find a page, we will need to create
4507 * a new page and fill it with data from the file.
4510 if (*pl
= page_lookup(vp
, off
, SE_SHARED
))
4512 else if (err
= zfs_fillpage(vp
, off
, seg
, addr
, pl
, plsz
, rw
))
4515 ASSERT3U((*pl
)->p_offset
, ==, off
);
4519 ASSERT3U(len
, >=, PAGESIZE
);
4522 ASSERT3U(plsz
, >=, PAGESIZE
);
4529 * Fill out the page array with any pages already in the cache.
4532 (*pl
++ = page_lookup_nowait(vp
, off
, SE_SHARED
))) {
4539 * Release any pages we have previously locked.
4544 ZFS_ACCESSTIME_STAMP(zfsvfs
, zp
);
4554 * Request a memory map for a section of a file. This code interacts
4555 * with common code and the VM system as follows:
4557 * common code calls mmap(), which ends up in smmap_common()
4559 * this calls VOP_MAP(), which takes you into (say) zfs
4561 * zfs_map() calls as_map(), passing segvn_create() as the callback
4563 * segvn_create() creates the new segment and calls VOP_ADDMAP()
4565 * zfs_addmap() updates z_mapcnt
4569 zfs_map(vnode_t
*vp
, offset_t off
, struct as
*as
, caddr_t
*addrp
,
4570 size_t len
, uchar_t prot
, uchar_t maxprot
, uint_t flags
, cred_t
*cr
,
4571 caller_context_t
*ct
)
4573 znode_t
*zp
= VTOZ(vp
);
4574 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4575 segvn_crargs_t vn_a
;
4581 if ((prot
& PROT_WRITE
) && (zp
->z_pflags
&
4582 (ZFS_IMMUTABLE
| ZFS_READONLY
| ZFS_APPENDONLY
))) {
4587 if ((prot
& (PROT_READ
| PROT_EXEC
)) &&
4588 (zp
->z_pflags
& ZFS_AV_QUARANTINED
)) {
4593 if (vp
->v_flag
& VNOMAP
) {
4598 if (off
< 0 || len
> MAXOFFSET_T
- off
) {
4603 if (vp
->v_type
!= VREG
) {
4609 * If file is locked, disallow mapping.
4611 if (MANDMODE(zp
->z_mode
) && vn_has_flocks(vp
)) {
4617 error
= choose_addr(as
, addrp
, len
, off
, ADDR_VACALIGN
, flags
);
4625 vn_a
.offset
= (u_offset_t
)off
;
4626 vn_a
.type
= flags
& MAP_TYPE
;
4628 vn_a
.maxprot
= maxprot
;
4631 vn_a
.flags
= flags
& ~MAP_TYPE
;
4633 vn_a
.lgrp_mem_policy_flags
= 0;
4635 error
= as_map(as
, *addrp
, len
, segvn_create
, &vn_a
);
4644 zfs_addmap(vnode_t
*vp
, offset_t off
, struct as
*as
, caddr_t addr
,
4645 size_t len
, uchar_t prot
, uchar_t maxprot
, uint_t flags
, cred_t
*cr
,
4646 caller_context_t
*ct
)
4648 uint64_t pages
= btopr(len
);
4650 atomic_add_64(&VTOZ(vp
)->z_mapcnt
, pages
);
4655 * The reason we push dirty pages as part of zfs_delmap() is so that we get a
4656 * more accurate mtime for the associated file. Since we don't have a way of
4657 * detecting when the data was actually modified, we have to resort to
4658 * heuristics. If an explicit msync() is done, then we mark the mtime when the
4659 * last page is pushed. The problem occurs when the msync() call is omitted,
4660 * which by far the most common case:
4668 * putpage() via fsflush
4670 * If we wait until fsflush to come along, we can have a modification time that
4671 * is some arbitrary point in the future. In order to prevent this in the
4672 * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is
4677 zfs_delmap(vnode_t
*vp
, offset_t off
, struct as
*as
, caddr_t addr
,
4678 size_t len
, uint_t prot
, uint_t maxprot
, uint_t flags
, cred_t
*cr
,
4679 caller_context_t
*ct
)
4681 uint64_t pages
= btopr(len
);
4683 ASSERT3U(VTOZ(vp
)->z_mapcnt
, >=, pages
);
4684 atomic_add_64(&VTOZ(vp
)->z_mapcnt
, -pages
);
4686 if ((flags
& MAP_SHARED
) && (prot
& PROT_WRITE
) &&
4687 vn_has_cached_data(vp
))
4688 (void) VOP_PUTPAGE(vp
, off
, len
, B_ASYNC
, cr
, ct
);
4694 * Free or allocate space in a file. Currently, this function only
4695 * supports the `F_FREESP' command. However, this command is somewhat
4696 * misnamed, as its functionality includes the ability to allocate as
4697 * well as free space.
4699 * IN: vp - vnode of file to free data in.
4700 * cmd - action to take (only F_FREESP supported).
4701 * bfp - section of file to free/alloc.
4702 * flag - current file open mode flags.
4703 * offset - current file offset.
4704 * cr - credentials of caller [UNUSED].
4705 * ct - caller context.
4707 * RETURN: 0 if success
4708 * error code if failure
4711 * vp - ctime|mtime updated
4715 zfs_space(vnode_t
*vp
, int cmd
, flock64_t
*bfp
, int flag
,
4716 offset_t offset
, cred_t
*cr
, caller_context_t
*ct
)
4718 znode_t
*zp
= VTOZ(vp
);
4719 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4726 if (cmd
!= F_FREESP
) {
4731 if ((error
= convoff(vp
, bfp
, 0, offset
))) {
4736 if (bfp
->l_len
< 0) {
4742 len
= bfp
->l_len
; /* 0 means from off to end of file */
4744 error
= zfs_freesp(zp
, off
, len
, flag
, TRUE
);
4752 zfs_fid(vnode_t
*vp
, fid_t
*fidp
, caller_context_t
*ct
)
4754 znode_t
*zp
= VTOZ(vp
);
4755 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4758 uint64_t object
= zp
->z_id
;
4765 if ((error
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_GEN(zfsvfs
),
4766 &gen64
, sizeof (uint64_t))) != 0) {
4771 gen
= (uint32_t)gen64
;
4773 size
= (zfsvfs
->z_parent
!= zfsvfs
) ? LONG_FID_LEN
: SHORT_FID_LEN
;
4774 if (fidp
->fid_len
< size
) {
4775 fidp
->fid_len
= size
;
4780 zfid
= (zfid_short_t
*)fidp
;
4782 zfid
->zf_len
= size
;
4784 for (i
= 0; i
< sizeof (zfid
->zf_object
); i
++)
4785 zfid
->zf_object
[i
] = (uint8_t)(object
>> (8 * i
));
4787 /* Must have a non-zero generation number to distinguish from .zfs */
4790 for (i
= 0; i
< sizeof (zfid
->zf_gen
); i
++)
4791 zfid
->zf_gen
[i
] = (uint8_t)(gen
>> (8 * i
));
4793 if (size
== LONG_FID_LEN
) {
4794 uint64_t objsetid
= dmu_objset_id(zfsvfs
->z_os
);
4797 zlfid
= (zfid_long_t
*)fidp
;
4799 for (i
= 0; i
< sizeof (zlfid
->zf_setid
); i
++)
4800 zlfid
->zf_setid
[i
] = (uint8_t)(objsetid
>> (8 * i
));
4802 /* XXX - this should be the generation number for the objset */
4803 for (i
= 0; i
< sizeof (zlfid
->zf_setgen
); i
++)
4804 zlfid
->zf_setgen
[i
] = 0;
4812 zfs_pathconf(vnode_t
*vp
, int cmd
, ulong_t
*valp
, cred_t
*cr
,
4813 caller_context_t
*ct
)
4825 case _PC_FILESIZEBITS
:
4829 case _PC_XATTR_EXISTS
:
4831 zfsvfs
= zp
->z_zfsvfs
;
4835 error
= zfs_dirent_lock(&dl
, zp
, "", &xzp
,
4836 ZXATTR
| ZEXISTS
| ZSHARED
, NULL
, NULL
);
4838 zfs_dirent_unlock(dl
);
4839 if (!zfs_dirempty(xzp
))
4842 } else if (error
== ENOENT
) {
4844 * If there aren't extended attributes, it's the
4845 * same as having zero of them.
4852 case _PC_SATTR_ENABLED
:
4853 case _PC_SATTR_EXISTS
:
4854 *valp
= vfs_has_feature(vp
->v_vfsp
, VFSFT_SYSATTR_VIEWS
) &&
4855 (vp
->v_type
== VREG
|| vp
->v_type
== VDIR
);
4858 case _PC_ACCESS_FILTERING
:
4859 *valp
= vfs_has_feature(vp
->v_vfsp
, VFSFT_ACCESS_FILTER
) &&
4863 case _PC_ACL_ENABLED
:
4864 *valp
= _ACL_ACE_ENABLED
;
4867 case _PC_MIN_HOLE_SIZE
:
4868 *valp
= (ulong_t
)SPA_MINBLOCKSIZE
;
4871 case _PC_TIMESTAMP_RESOLUTION
:
4872 /* nanosecond timestamp resolution */
4877 return (fs_pathconf(vp
, cmd
, valp
, cr
, ct
));
4883 zfs_getsecattr(vnode_t
*vp
, vsecattr_t
*vsecp
, int flag
, cred_t
*cr
,
4884 caller_context_t
*ct
)
4886 znode_t
*zp
= VTOZ(vp
);
4887 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4889 boolean_t skipaclchk
= (flag
& ATTR_NOACLCHECK
) ? B_TRUE
: B_FALSE
;
4893 error
= zfs_getacl(zp
, vsecp
, skipaclchk
, cr
);
4901 zfs_setsecattr(vnode_t
*vp
, vsecattr_t
*vsecp
, int flag
, cred_t
*cr
,
4902 caller_context_t
*ct
)
4904 znode_t
*zp
= VTOZ(vp
);
4905 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4907 boolean_t skipaclchk
= (flag
& ATTR_NOACLCHECK
) ? B_TRUE
: B_FALSE
;
4908 zilog_t
*zilog
= zfsvfs
->z_log
;
4913 error
= zfs_setacl(zp
, vsecp
, skipaclchk
, cr
);
4915 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
4916 zil_commit(zilog
, 0);
4923 * Tunable, both must be a power of 2.
4925 * zcr_blksz_min: the smallest read we may consider to loan out an arcbuf
4926 * zcr_blksz_max: if set to less than the file block size, allow loaning out of
4927 * an arcbuf for a partial block read
4929 int zcr_blksz_min
= (1 << 10); /* 1K */
4930 int zcr_blksz_max
= (1 << 17); /* 128K */
4934 zfs_reqzcbuf(vnode_t
*vp
, enum uio_rw ioflag
, xuio_t
*xuio
, cred_t
*cr
,
4935 caller_context_t
*ct
)
4937 znode_t
*zp
= VTOZ(vp
);
4938 zfsvfs_t
*zfsvfs
= zp
->z_zfsvfs
;
4939 int max_blksz
= zfsvfs
->z_max_blksz
;
4940 uio_t
*uio
= &xuio
->xu_uio
;
4941 ssize_t size
= uio
->uio_resid
;
4942 offset_t offset
= uio
->uio_loffset
;
4947 int preamble
, postamble
;
4949 if (xuio
->xu_type
!= UIOTYPE_ZEROCOPY
)
4957 * Loan out an arc_buf for write if write size is bigger than
4958 * max_blksz, and the file's block size is also max_blksz.
4961 if (size
< blksz
|| zp
->z_blksz
!= blksz
) {
4966 * Caller requests buffers for write before knowing where the
4967 * write offset might be (e.g. NFS TCP write).
4972 preamble
= P2PHASE(offset
, blksz
);
4974 preamble
= blksz
- preamble
;
4979 postamble
= P2PHASE(size
, blksz
);
4982 fullblk
= size
/ blksz
;
4983 (void) dmu_xuio_init(xuio
,
4984 (preamble
!= 0) + fullblk
+ (postamble
!= 0));
4985 DTRACE_PROBE3(zfs_reqzcbuf_align
, int, preamble
,
4986 int, postamble
, int,
4987 (preamble
!= 0) + fullblk
+ (postamble
!= 0));
4990 * Have to fix iov base/len for partial buffers. They
4991 * currently represent full arc_buf's.
4994 /* data begins in the middle of the arc_buf */
4995 abuf
= dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
4998 (void) dmu_xuio_add(xuio
, abuf
,
4999 blksz
- preamble
, preamble
);
5002 for (i
= 0; i
< fullblk
; i
++) {
5003 abuf
= dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
5006 (void) dmu_xuio_add(xuio
, abuf
, 0, blksz
);
5010 /* data ends in the middle of the arc_buf */
5011 abuf
= dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
5014 (void) dmu_xuio_add(xuio
, abuf
, 0, postamble
);
5019 * Loan out an arc_buf for read if the read size is larger than
5020 * the current file block size. Block alignment is not
5021 * considered. Partial arc_buf will be loaned out for read.
5023 blksz
= zp
->z_blksz
;
5024 if (blksz
< zcr_blksz_min
)
5025 blksz
= zcr_blksz_min
;
5026 if (blksz
> zcr_blksz_max
)
5027 blksz
= zcr_blksz_max
;
5028 /* avoid potential complexity of dealing with it */
5029 if (blksz
> max_blksz
) {
5034 maxsize
= zp
->z_size
- uio
->uio_loffset
;
5038 if (size
< blksz
|| vn_has_cached_data(vp
)) {
5048 uio
->uio_extflg
= UIO_XUIO
;
5049 XUIO_XUZC_RW(xuio
) = ioflag
;
5056 zfs_retzcbuf(vnode_t
*vp
, xuio_t
*xuio
, cred_t
*cr
, caller_context_t
*ct
)
5060 int ioflag
= XUIO_XUZC_RW(xuio
);
5062 ASSERT(xuio
->xu_type
== UIOTYPE_ZEROCOPY
);
5064 i
= dmu_xuio_cnt(xuio
);
5066 abuf
= dmu_xuio_arcbuf(xuio
, i
);
5068 * if abuf == NULL, it must be a write buffer
5069 * that has been returned in zfs_write().
5072 dmu_return_arcbuf(abuf
);
5073 ASSERT(abuf
|| ioflag
== UIO_WRITE
);
5076 dmu_xuio_fini(xuio
);
5081 * Predeclare these here so that the compiler assumes that
5082 * this is an "old style" function declaration that does
5083 * not include arguments => we won't get type mismatch errors
5084 * in the initializations that follow.
5086 static int zfs_inval();
5087 static int zfs_isdir();
5101 * Directory vnode operations template
5103 vnodeops_t
*zfs_dvnodeops
;
5104 const fs_operation_def_t zfs_dvnodeops_template
[] = {
5105 VOPNAME_OPEN
, { .vop_open
= zfs_open
},
5106 VOPNAME_CLOSE
, { .vop_close
= zfs_close
},
5107 VOPNAME_READ
, { .error
= zfs_isdir
},
5108 VOPNAME_WRITE
, { .error
= zfs_isdir
},
5109 VOPNAME_IOCTL
, { .vop_ioctl
= zfs_ioctl
},
5110 VOPNAME_GETATTR
, { .vop_getattr
= zfs_getattr
},
5111 VOPNAME_SETATTR
, { .vop_setattr
= zfs_setattr
},
5112 VOPNAME_ACCESS
, { .vop_access
= zfs_access
},
5113 VOPNAME_LOOKUP
, { .vop_lookup
= zfs_lookup
},
5114 VOPNAME_CREATE
, { .vop_create
= zfs_create
},
5115 VOPNAME_REMOVE
, { .vop_remove
= zfs_remove
},
5116 VOPNAME_LINK
, { .vop_link
= zfs_link
},
5117 VOPNAME_RENAME
, { .vop_rename
= zfs_rename
},
5118 VOPNAME_MKDIR
, { .vop_mkdir
= zfs_mkdir
},
5119 VOPNAME_RMDIR
, { .vop_rmdir
= zfs_rmdir
},
5120 VOPNAME_READDIR
, { .vop_readdir
= zfs_readdir
},
5121 VOPNAME_SYMLINK
, { .vop_symlink
= zfs_symlink
},
5122 VOPNAME_FSYNC
, { .vop_fsync
= zfs_fsync
},
5123 VOPNAME_INACTIVE
, { .vop_inactive
= zfs_inactive
},
5124 VOPNAME_FID
, { .vop_fid
= zfs_fid
},
5125 VOPNAME_SEEK
, { .vop_seek
= zfs_seek
},
5126 VOPNAME_PATHCONF
, { .vop_pathconf
= zfs_pathconf
},
5127 VOPNAME_GETSECATTR
, { .vop_getsecattr
= zfs_getsecattr
},
5128 VOPNAME_SETSECATTR
, { .vop_setsecattr
= zfs_setsecattr
},
5129 VOPNAME_VNEVENT
, { .vop_vnevent
= fs_vnevent_support
},
5134 * Regular file vnode operations template
5136 vnodeops_t
*zfs_fvnodeops
;
5137 const fs_operation_def_t zfs_fvnodeops_template
[] = {
5138 VOPNAME_OPEN
, { .vop_open
= zfs_open
},
5139 VOPNAME_CLOSE
, { .vop_close
= zfs_close
},
5140 VOPNAME_READ
, { .vop_read
= zfs_read
},
5141 VOPNAME_WRITE
, { .vop_write
= zfs_write
},
5142 VOPNAME_IOCTL
, { .vop_ioctl
= zfs_ioctl
},
5143 VOPNAME_GETATTR
, { .vop_getattr
= zfs_getattr
},
5144 VOPNAME_SETATTR
, { .vop_setattr
= zfs_setattr
},
5145 VOPNAME_ACCESS
, { .vop_access
= zfs_access
},
5146 VOPNAME_LOOKUP
, { .vop_lookup
= zfs_lookup
},
5147 VOPNAME_RENAME
, { .vop_rename
= zfs_rename
},
5148 VOPNAME_FSYNC
, { .vop_fsync
= zfs_fsync
},
5149 VOPNAME_INACTIVE
, { .vop_inactive
= zfs_inactive
},
5150 VOPNAME_FID
, { .vop_fid
= zfs_fid
},
5151 VOPNAME_SEEK
, { .vop_seek
= zfs_seek
},
5152 VOPNAME_FRLOCK
, { .vop_frlock
= zfs_frlock
},
5153 VOPNAME_SPACE
, { .vop_space
= zfs_space
},
5154 VOPNAME_GETPAGE
, { .vop_getpage
= zfs_getpage
},
5155 VOPNAME_PUTPAGE
, { .vop_putpage
= zfs_putpage
},
5156 VOPNAME_MAP
, { .vop_map
= zfs_map
},
5157 VOPNAME_ADDMAP
, { .vop_addmap
= zfs_addmap
},
5158 VOPNAME_DELMAP
, { .vop_delmap
= zfs_delmap
},
5159 VOPNAME_PATHCONF
, { .vop_pathconf
= zfs_pathconf
},
5160 VOPNAME_GETSECATTR
, { .vop_getsecattr
= zfs_getsecattr
},
5161 VOPNAME_SETSECATTR
, { .vop_setsecattr
= zfs_setsecattr
},
5162 VOPNAME_VNEVENT
, { .vop_vnevent
= fs_vnevent_support
},
5163 VOPNAME_REQZCBUF
, { .vop_reqzcbuf
= zfs_reqzcbuf
},
5164 VOPNAME_RETZCBUF
, { .vop_retzcbuf
= zfs_retzcbuf
},
5169 * Symbolic link vnode operations template
5171 vnodeops_t
*zfs_symvnodeops
;
5172 const fs_operation_def_t zfs_symvnodeops_template
[] = {
5173 VOPNAME_GETATTR
, { .vop_getattr
= zfs_getattr
},
5174 VOPNAME_SETATTR
, { .vop_setattr
= zfs_setattr
},
5175 VOPNAME_ACCESS
, { .vop_access
= zfs_access
},
5176 VOPNAME_RENAME
, { .vop_rename
= zfs_rename
},
5177 VOPNAME_READLINK
, { .vop_readlink
= zfs_readlink
},
5178 VOPNAME_INACTIVE
, { .vop_inactive
= zfs_inactive
},
5179 VOPNAME_FID
, { .vop_fid
= zfs_fid
},
5180 VOPNAME_PATHCONF
, { .vop_pathconf
= zfs_pathconf
},
5181 VOPNAME_VNEVENT
, { .vop_vnevent
= fs_vnevent_support
},
5186 * special share hidden files vnode operations template
5188 vnodeops_t
*zfs_sharevnodeops
;
5189 const fs_operation_def_t zfs_sharevnodeops_template
[] = {
5190 VOPNAME_GETATTR
, { .vop_getattr
= zfs_getattr
},
5191 VOPNAME_ACCESS
, { .vop_access
= zfs_access
},
5192 VOPNAME_INACTIVE
, { .vop_inactive
= zfs_inactive
},
5193 VOPNAME_FID
, { .vop_fid
= zfs_fid
},
5194 VOPNAME_PATHCONF
, { .vop_pathconf
= zfs_pathconf
},
5195 VOPNAME_GETSECATTR
, { .vop_getsecattr
= zfs_getsecattr
},
5196 VOPNAME_SETSECATTR
, { .vop_setsecattr
= zfs_setsecattr
},
5197 VOPNAME_VNEVENT
, { .vop_vnevent
= fs_vnevent_support
},
5202 * Extended attribute directory vnode operations template
5203 * This template is identical to the directory vnodes
5204 * operation template except for restricted operations:
5207 * Note that there are other restrictions embedded in:
5208 * zfs_create() - restrict type to VREG
5209 * zfs_link() - no links into/out of attribute space
5210 * zfs_rename() - no moves into/out of attribute space
5212 vnodeops_t
*zfs_xdvnodeops
;
5213 const fs_operation_def_t zfs_xdvnodeops_template
[] = {
5214 VOPNAME_OPEN
, { .vop_open
= zfs_open
},
5215 VOPNAME_CLOSE
, { .vop_close
= zfs_close
},
5216 VOPNAME_IOCTL
, { .vop_ioctl
= zfs_ioctl
},
5217 VOPNAME_GETATTR
, { .vop_getattr
= zfs_getattr
},
5218 VOPNAME_SETATTR
, { .vop_setattr
= zfs_setattr
},
5219 VOPNAME_ACCESS
, { .vop_access
= zfs_access
},
5220 VOPNAME_LOOKUP
, { .vop_lookup
= zfs_lookup
},
5221 VOPNAME_CREATE
, { .vop_create
= zfs_create
},
5222 VOPNAME_REMOVE
, { .vop_remove
= zfs_remove
},
5223 VOPNAME_LINK
, { .vop_link
= zfs_link
},
5224 VOPNAME_RENAME
, { .vop_rename
= zfs_rename
},
5225 VOPNAME_MKDIR
, { .error
= zfs_inval
},
5226 VOPNAME_RMDIR
, { .vop_rmdir
= zfs_rmdir
},
5227 VOPNAME_READDIR
, { .vop_readdir
= zfs_readdir
},
5228 VOPNAME_SYMLINK
, { .error
= zfs_inval
},
5229 VOPNAME_FSYNC
, { .vop_fsync
= zfs_fsync
},
5230 VOPNAME_INACTIVE
, { .vop_inactive
= zfs_inactive
},
5231 VOPNAME_FID
, { .vop_fid
= zfs_fid
},
5232 VOPNAME_SEEK
, { .vop_seek
= zfs_seek
},
5233 VOPNAME_PATHCONF
, { .vop_pathconf
= zfs_pathconf
},
5234 VOPNAME_GETSECATTR
, { .vop_getsecattr
= zfs_getsecattr
},
5235 VOPNAME_SETSECATTR
, { .vop_setsecattr
= zfs_setsecattr
},
5236 VOPNAME_VNEVENT
, { .vop_vnevent
= fs_vnevent_support
},
5241 * Error vnode operations template
5243 vnodeops_t
*zfs_evnodeops
;
5244 const fs_operation_def_t zfs_evnodeops_template
[] = {
5245 VOPNAME_INACTIVE
, { .vop_inactive
= zfs_inactive
},
5246 VOPNAME_PATHCONF
, { .vop_pathconf
= zfs_pathconf
},
5249 #endif /* HAVE_ZPL */