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]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012, 2015 by Delphix. All rights reserved.
25 * Copyright (c) 2015 by Chunwei Chen. All rights reserved.
26 * Copyright 2017 Nexenta Systems, Inc.
29 /* Portions Copyright 2007 Jeremy Teo */
30 /* Portions Copyright 2010 Robert Milkowski */
33 #include <sys/types.h>
34 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/sysmacros.h>
38 #include <sys/resource.h>
40 #include <sys/vfs_opreg.h>
44 #include <sys/taskq.h>
46 #include <sys/vmsystm.h>
47 #include <sys/atomic.h>
49 #include <sys/pathname.h>
50 #include <sys/cmn_err.h>
51 #include <sys/errno.h>
52 #include <sys/unistd.h>
53 #include <sys/zfs_dir.h>
54 #include <sys/zfs_acl.h>
55 #include <sys/zfs_ioctl.h>
56 #include <sys/fs/zfs.h>
58 #include <sys/dmu_objset.h>
64 #include <sys/dirent.h>
65 #include <sys/policy.h>
66 #include <sys/sunddi.h>
69 #include "fs/fs_subr.h"
70 #include <sys/zfs_ctldir.h>
71 #include <sys/zfs_fuid.h>
72 #include <sys/zfs_sa.h>
73 #include <sys/zfs_vnops.h>
75 #include <sys/zfs_rlock.h>
76 #include <sys/extdirent.h>
77 #include <sys/kidmap.h>
85 * Each vnode op performs some logical unit of work. To do this, the ZPL must
86 * properly lock its in-core state, create a DMU transaction, do the work,
87 * record this work in the intent log (ZIL), commit the DMU transaction,
88 * and wait for the intent log to commit if it is a synchronous operation.
89 * Moreover, the vnode ops must work in both normal and log replay context.
90 * The ordering of events is important to avoid deadlocks and references
91 * to freed memory. The example below illustrates the following Big Rules:
93 * (1) A check must be made in each zfs thread for a mounted file system.
94 * This is done avoiding races using ZFS_ENTER(zfsvfs).
95 * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes
96 * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros
97 * can return EIO from the calling function.
99 * (2) iput() should always be the last thing except for zil_commit()
100 * (if necessary) and ZFS_EXIT(). This is for 3 reasons:
101 * First, if it's the last reference, the vnode/znode
102 * can be freed, so the zp may point to freed memory. Second, the last
103 * reference will call zfs_zinactive(), which may induce a lot of work --
104 * pushing cached pages (which acquires range locks) and syncing out
105 * cached atime changes. Third, zfs_zinactive() may require a new tx,
106 * which could deadlock the system if you were already holding one.
107 * If you must call iput() within a tx then use zfs_iput_async().
109 * (3) All range locks must be grabbed before calling dmu_tx_assign(),
110 * as they can span dmu_tx_assign() calls.
112 * (4) If ZPL locks are held, pass TXG_NOWAIT as the second argument to
113 * dmu_tx_assign(). This is critical because we don't want to block
114 * while holding locks.
116 * If no ZPL locks are held (aside from ZFS_ENTER()), use TXG_WAIT. This
117 * reduces lock contention and CPU usage when we must wait (note that if
118 * throughput is constrained by the storage, nearly every transaction
121 * Note, in particular, that if a lock is sometimes acquired before
122 * the tx assigns, and sometimes after (e.g. z_lock), then failing
123 * to use a non-blocking assign can deadlock the system. The scenario:
125 * Thread A has grabbed a lock before calling dmu_tx_assign().
126 * Thread B is in an already-assigned tx, and blocks for this lock.
127 * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open()
128 * forever, because the previous txg can't quiesce until B's tx commits.
130 * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT,
131 * then drop all locks, call dmu_tx_wait(), and try again. On subsequent
132 * calls to dmu_tx_assign(), pass TXG_WAITED rather than TXG_NOWAIT,
133 * to indicate that this operation has already called dmu_tx_wait().
134 * This will ensure that we don't retry forever, waiting a short bit
137 * (5) If the operation succeeded, generate the intent log entry for it
138 * before dropping locks. This ensures that the ordering of events
139 * in the intent log matches the order in which they actually occurred.
140 * During ZIL replay the zfs_log_* functions will update the sequence
141 * number to indicate the zil transaction has replayed.
143 * (6) At the end of each vnode op, the DMU tx must always commit,
144 * regardless of whether there were any errors.
146 * (7) After dropping all locks, invoke zil_commit(zilog, foid)
147 * to ensure that synchronous semantics are provided when necessary.
149 * In general, this is how things should be ordered in each vnode op:
151 * ZFS_ENTER(zfsvfs); // exit if unmounted
153 * zfs_dirent_lock(&dl, ...) // lock directory entry (may igrab())
154 * rw_enter(...); // grab any other locks you need
155 * tx = dmu_tx_create(...); // get DMU tx
156 * dmu_tx_hold_*(); // hold each object you might modify
157 * error = dmu_tx_assign(tx, waited ? TXG_WAITED : TXG_NOWAIT);
159 * rw_exit(...); // drop locks
160 * zfs_dirent_unlock(dl); // unlock directory entry
161 * iput(...); // release held vnodes
162 * if (error == ERESTART) {
168 * dmu_tx_abort(tx); // abort DMU tx
169 * ZFS_EXIT(zfsvfs); // finished in zfs
170 * return (error); // really out of space
172 * error = do_real_work(); // do whatever this VOP does
174 * zfs_log_*(...); // on success, make ZIL entry
175 * dmu_tx_commit(tx); // commit DMU tx -- error or not
176 * rw_exit(...); // drop locks
177 * zfs_dirent_unlock(dl); // unlock directory entry
178 * iput(...); // release held vnodes
179 * zil_commit(zilog, foid); // synchronous when necessary
180 * ZFS_EXIT(zfsvfs); // finished in zfs
181 * return (error); // done, report error
185 * Virus scanning is unsupported. It would be possible to add a hook
186 * here to performance the required virus scan. This could be done
187 * entirely in the kernel or potentially as an update to invoke a
191 zfs_vscan(struct inode
*ip
, cred_t
*cr
, int async
)
198 zfs_open(struct inode
*ip
, int mode
, int flag
, cred_t
*cr
)
200 znode_t
*zp
= ITOZ(ip
);
201 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
206 /* Honor ZFS_APPENDONLY file attribute */
207 if ((mode
& FMODE_WRITE
) && (zp
->z_pflags
& ZFS_APPENDONLY
) &&
208 ((flag
& O_APPEND
) == 0)) {
210 return (SET_ERROR(EPERM
));
213 /* Virus scan eligible files on open */
214 if (!zfs_has_ctldir(zp
) && zfsvfs
->z_vscan
&& S_ISREG(ip
->i_mode
) &&
215 !(zp
->z_pflags
& ZFS_AV_QUARANTINED
) && zp
->z_size
> 0) {
216 if (zfs_vscan(ip
, cr
, 0) != 0) {
218 return (SET_ERROR(EACCES
));
222 /* Keep a count of the synchronous opens in the znode */
224 atomic_inc_32(&zp
->z_sync_cnt
);
232 zfs_close(struct inode
*ip
, int flag
, cred_t
*cr
)
234 znode_t
*zp
= ITOZ(ip
);
235 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
240 /* Decrement the synchronous opens in the znode */
242 atomic_dec_32(&zp
->z_sync_cnt
);
244 if (!zfs_has_ctldir(zp
) && zfsvfs
->z_vscan
&& S_ISREG(ip
->i_mode
) &&
245 !(zp
->z_pflags
& ZFS_AV_QUARANTINED
) && zp
->z_size
> 0)
246 VERIFY(zfs_vscan(ip
, cr
, 1) == 0);
252 #if defined(SEEK_HOLE) && defined(SEEK_DATA)
254 * Lseek support for finding holes (cmd == SEEK_HOLE) and
255 * data (cmd == SEEK_DATA). "off" is an in/out parameter.
258 zfs_holey_common(struct inode
*ip
, int cmd
, loff_t
*off
)
260 znode_t
*zp
= ITOZ(ip
);
261 uint64_t noff
= (uint64_t)*off
; /* new offset */
266 file_sz
= zp
->z_size
;
267 if (noff
>= file_sz
) {
268 return (SET_ERROR(ENXIO
));
271 if (cmd
== SEEK_HOLE
)
276 error
= dmu_offset_next(ZTOZSB(zp
)->z_os
, zp
->z_id
, hole
, &noff
);
279 return (SET_ERROR(ENXIO
));
281 /* file was dirty, so fall back to using generic logic */
282 if (error
== EBUSY
) {
290 * We could find a hole that begins after the logical end-of-file,
291 * because dmu_offset_next() only works on whole blocks. If the
292 * EOF falls mid-block, then indicate that the "virtual hole"
293 * at the end of the file begins at the logical EOF, rather than
294 * at the end of the last block.
296 if (noff
> file_sz
) {
308 zfs_holey(struct inode
*ip
, int cmd
, loff_t
*off
)
310 znode_t
*zp
= ITOZ(ip
);
311 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
317 error
= zfs_holey_common(ip
, cmd
, off
);
322 #endif /* SEEK_HOLE && SEEK_DATA */
326 * When a file is memory mapped, we must keep the IO data synchronized
327 * between the DMU cache and the memory mapped pages. What this means:
329 * On Write: If we find a memory mapped page, we write to *both*
330 * the page and the dmu buffer.
333 update_pages(struct inode
*ip
, int64_t start
, int len
,
334 objset_t
*os
, uint64_t oid
)
336 struct address_space
*mp
= ip
->i_mapping
;
342 off
= start
& (PAGE_SIZE
-1);
343 for (start
&= PAGE_MASK
; len
> 0; start
+= PAGE_SIZE
) {
344 nbytes
= MIN(PAGE_SIZE
- off
, len
);
346 pp
= find_lock_page(mp
, start
>> PAGE_SHIFT
);
348 if (mapping_writably_mapped(mp
))
349 flush_dcache_page(pp
);
352 (void) dmu_read(os
, oid
, start
+off
, nbytes
, pb
+off
,
356 if (mapping_writably_mapped(mp
))
357 flush_dcache_page(pp
);
359 mark_page_accessed(pp
);
372 * When a file is memory mapped, we must keep the IO data synchronized
373 * between the DMU cache and the memory mapped pages. What this means:
375 * On Read: We "read" preferentially from memory mapped pages,
376 * else we default from the dmu buffer.
378 * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when
379 * the file is memory mapped.
382 mappedread(struct inode
*ip
, int nbytes
, uio_t
*uio
)
384 struct address_space
*mp
= ip
->i_mapping
;
386 znode_t
*zp
= ITOZ(ip
);
393 start
= uio
->uio_loffset
;
394 off
= start
& (PAGE_SIZE
-1);
395 for (start
&= PAGE_MASK
; len
> 0; start
+= PAGE_SIZE
) {
396 bytes
= MIN(PAGE_SIZE
- off
, len
);
398 pp
= find_lock_page(mp
, start
>> PAGE_SHIFT
);
400 ASSERT(PageUptodate(pp
));
403 error
= uiomove(pb
+ off
, bytes
, UIO_READ
, uio
);
406 if (mapping_writably_mapped(mp
))
407 flush_dcache_page(pp
);
409 mark_page_accessed(pp
);
413 error
= dmu_read_uio_dbuf(sa_get_db(zp
->z_sa_hdl
),
426 unsigned long zfs_read_chunk_size
= 1024 * 1024; /* Tunable */
427 unsigned long zfs_delete_blocks
= DMU_MAX_DELETEBLKCNT
;
430 * Read bytes from specified file into supplied buffer.
432 * IN: ip - inode of file to be read from.
433 * uio - structure supplying read location, range info,
435 * ioflag - FSYNC flags; used to provide FRSYNC semantics.
436 * O_DIRECT flag; used to bypass page cache.
437 * cr - credentials of caller.
439 * OUT: uio - updated offset and range, buffer filled.
441 * RETURN: 0 on success, error code on failure.
444 * inode - atime updated if byte count > 0
448 zfs_read(struct inode
*ip
, uio_t
*uio
, int ioflag
, cred_t
*cr
)
450 znode_t
*zp
= ITOZ(ip
);
451 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
455 #ifdef HAVE_UIO_ZEROCOPY
457 #endif /* HAVE_UIO_ZEROCOPY */
462 if (zp
->z_pflags
& ZFS_AV_QUARANTINED
) {
464 return (SET_ERROR(EACCES
));
468 * Validate file offset
470 if (uio
->uio_loffset
< (offset_t
)0) {
472 return (SET_ERROR(EINVAL
));
476 * Fasttrack empty reads
478 if (uio
->uio_resid
== 0) {
484 * If we're in FRSYNC mode, sync out this znode before reading it.
485 * Only do this for non-snapshots.
488 (ioflag
& FRSYNC
|| zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
))
489 zil_commit(zfsvfs
->z_log
, zp
->z_id
);
492 * Lock the range against changes.
494 rl
= zfs_range_lock(&zp
->z_range_lock
, uio
->uio_loffset
, uio
->uio_resid
,
498 * If we are reading past end-of-file we can skip
499 * to the end; but we might still need to set atime.
501 if (uio
->uio_loffset
>= zp
->z_size
) {
506 ASSERT(uio
->uio_loffset
< zp
->z_size
);
507 n
= MIN(uio
->uio_resid
, zp
->z_size
- uio
->uio_loffset
);
509 #ifdef HAVE_UIO_ZEROCOPY
510 if ((uio
->uio_extflg
== UIO_XUIO
) &&
511 (((xuio_t
*)uio
)->xu_type
== UIOTYPE_ZEROCOPY
)) {
513 int blksz
= zp
->z_blksz
;
514 uint64_t offset
= uio
->uio_loffset
;
516 xuio
= (xuio_t
*)uio
;
518 nblk
= (P2ROUNDUP(offset
+ n
, blksz
) - P2ALIGN(offset
,
521 ASSERT(offset
+ n
<= blksz
);
524 (void) dmu_xuio_init(xuio
, nblk
);
526 if (vn_has_cached_data(ip
)) {
528 * For simplicity, we always allocate a full buffer
529 * even if we only expect to read a portion of a block.
531 while (--nblk
>= 0) {
532 (void) dmu_xuio_add(xuio
,
533 dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
538 #endif /* HAVE_UIO_ZEROCOPY */
541 nbytes
= MIN(n
, zfs_read_chunk_size
-
542 P2PHASE(uio
->uio_loffset
, zfs_read_chunk_size
));
544 if (zp
->z_is_mapped
&& !(ioflag
& O_DIRECT
)) {
545 error
= mappedread(ip
, nbytes
, uio
);
547 error
= dmu_read_uio_dbuf(sa_get_db(zp
->z_sa_hdl
),
552 /* convert checksum errors into IO errors */
554 error
= SET_ERROR(EIO
);
561 zfs_range_unlock(rl
);
568 * Write the bytes to a file.
570 * IN: ip - inode of file to be written to.
571 * uio - structure supplying write location, range info,
573 * ioflag - FAPPEND flag set if in append mode.
574 * O_DIRECT flag; used to bypass page cache.
575 * cr - credentials of caller.
577 * OUT: uio - updated offset and range.
579 * RETURN: 0 if success
580 * error code if failure
583 * ip - ctime|mtime updated if byte count > 0
588 zfs_write(struct inode
*ip
, uio_t
*uio
, int ioflag
, cred_t
*cr
)
590 znode_t
*zp
= ITOZ(ip
);
591 rlim64_t limit
= uio
->uio_limit
;
592 ssize_t start_resid
= uio
->uio_resid
;
596 zfsvfs_t
*zfsvfs
= ZTOZSB(zp
);
601 int max_blksz
= zfsvfs
->z_max_blksz
;
604 const iovec_t
*aiov
= NULL
;
608 sa_bulk_attr_t bulk
[4];
609 uint64_t mtime
[2], ctime
[2];
611 #ifdef HAVE_UIO_ZEROCOPY
613 const iovec_t
*iovp
= uio
->uio_iov
;
614 ASSERTV(int iovcnt
= uio
->uio_iovcnt
);
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 * Callers might not be able to detect properly that we are read-only,
639 * so check it explicitly here.
641 if (zfs_is_readonly(zfsvfs
)) {
643 return (SET_ERROR(EROFS
));
647 * If immutable or not appending then return EPERM
649 if ((zp
->z_pflags
& (ZFS_IMMUTABLE
| ZFS_READONLY
)) ||
650 ((zp
->z_pflags
& ZFS_APPENDONLY
) && !(ioflag
& FAPPEND
) &&
651 (uio
->uio_loffset
< zp
->z_size
))) {
653 return (SET_ERROR(EPERM
));
656 zilog
= zfsvfs
->z_log
;
659 * Validate file offset
661 woff
= ioflag
& FAPPEND
? zp
->z_size
: uio
->uio_loffset
;
664 return (SET_ERROR(EINVAL
));
668 * Pre-fault the pages to ensure slow (eg NFS) pages
670 * Skip this if uio contains loaned arc_buf.
672 #ifdef HAVE_UIO_ZEROCOPY
673 if ((uio
->uio_extflg
== UIO_XUIO
) &&
674 (((xuio_t
*)uio
)->xu_type
== UIOTYPE_ZEROCOPY
))
675 xuio
= (xuio_t
*)uio
;
678 uio_prefaultpages(MIN(n
, max_blksz
), uio
);
681 * If in append mode, set the io offset pointer to eof.
683 if (ioflag
& FAPPEND
) {
685 * Obtain an appending range lock to guarantee file append
686 * semantics. We reset the write offset once we have the lock.
688 rl
= zfs_range_lock(&zp
->z_range_lock
, 0, n
, RL_APPEND
);
690 if (rl
->r_len
== UINT64_MAX
) {
692 * We overlocked the file because this write will cause
693 * the file block size to increase.
694 * Note that zp_size cannot change with this lock held.
698 uio
->uio_loffset
= woff
;
701 * Note that if the file block size will change as a result of
702 * this write, then this range lock will lock the entire file
703 * so that we can re-write the block safely.
705 rl
= zfs_range_lock(&zp
->z_range_lock
, woff
, n
, RL_WRITER
);
709 zfs_range_unlock(rl
);
711 return (SET_ERROR(EFBIG
));
714 if ((woff
+ n
) > limit
|| woff
> (limit
- n
))
717 /* Will this write extend the file length? */
718 write_eof
= (woff
+ n
> zp
->z_size
);
720 end_size
= MAX(zp
->z_size
, woff
+ n
);
723 * Write the file in reasonable size chunks. Each chunk is written
724 * in a separate transaction; this keeps the intent log records small
725 * and allows us to do more fine-grained space accounting.
729 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
);
734 error
= SET_ERROR(EDQUOT
);
738 if (xuio
&& abuf
== NULL
) {
739 #ifdef HAVE_UIO_ZEROCOPY
740 ASSERT(i_iov
< iovcnt
);
741 ASSERT3U(uio
->uio_segflg
, !=, UIO_BVEC
);
743 abuf
= dmu_xuio_arcbuf(xuio
, i_iov
);
744 dmu_xuio_clear(xuio
, i_iov
);
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
)));
750 } else if (abuf
== NULL
&& n
>= max_blksz
&&
751 woff
>= zp
->z_size
&&
752 P2PHASE(woff
, max_blksz
) == 0 &&
753 zp
->z_blksz
== max_blksz
) {
755 * This write covers a full block. "Borrow" a buffer
756 * from the dmu so that we can fill it before we enter
757 * a transaction. This avoids the possibility of
758 * holding up the transaction if the data copy hangs
759 * up on a pagefault (e.g., from an NFS server mapping).
763 abuf
= dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
765 ASSERT(abuf
!= NULL
);
766 ASSERT(arc_buf_size(abuf
) == max_blksz
);
767 if ((error
= uiocopy(abuf
->b_data
, max_blksz
,
768 UIO_WRITE
, uio
, &cbytes
))) {
769 dmu_return_arcbuf(abuf
);
772 ASSERT(cbytes
== max_blksz
);
776 * Start a transaction.
778 tx
= dmu_tx_create(zfsvfs
->z_os
);
779 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
780 dmu_tx_hold_write(tx
, zp
->z_id
, woff
, MIN(n
, max_blksz
));
781 zfs_sa_upgrade_txholds(tx
, zp
);
782 error
= dmu_tx_assign(tx
, TXG_WAIT
);
786 dmu_return_arcbuf(abuf
);
791 * If zfs_range_lock() over-locked we grow the blocksize
792 * and then reduce the lock range. This will only happen
793 * on the first iteration since zfs_range_reduce() will
794 * shrink down r_len to the appropriate size.
796 if (rl
->r_len
== UINT64_MAX
) {
799 if (zp
->z_blksz
> max_blksz
) {
801 * File's blocksize is already larger than the
802 * "recordsize" property. Only let it grow to
803 * the next power of 2.
805 ASSERT(!ISP2(zp
->z_blksz
));
806 new_blksz
= MIN(end_size
,
807 1 << highbit64(zp
->z_blksz
));
809 new_blksz
= MIN(end_size
, max_blksz
);
811 zfs_grow_blocksize(zp
, new_blksz
, tx
);
812 zfs_range_reduce(rl
, woff
, n
);
816 * XXX - should we really limit each write to z_max_blksz?
817 * Perhaps we should use SPA_MAXBLOCKSIZE chunks?
819 nbytes
= MIN(n
, max_blksz
- P2PHASE(woff
, max_blksz
));
822 tx_bytes
= uio
->uio_resid
;
823 error
= dmu_write_uio_dbuf(sa_get_db(zp
->z_sa_hdl
),
825 tx_bytes
-= uio
->uio_resid
;
828 ASSERT(xuio
== NULL
|| tx_bytes
== aiov
->iov_len
);
830 * If this is not a full block write, but we are
831 * extending the file past EOF and this data starts
832 * block-aligned, use assign_arcbuf(). Otherwise,
833 * write via dmu_write().
835 if (tx_bytes
< max_blksz
&& (!write_eof
||
836 aiov
->iov_base
!= abuf
->b_data
)) {
838 dmu_write(zfsvfs
->z_os
, zp
->z_id
, woff
,
839 /* cppcheck-suppress nullPointer */
840 aiov
->iov_len
, aiov
->iov_base
, tx
);
841 dmu_return_arcbuf(abuf
);
842 xuio_stat_wbuf_copied();
844 ASSERT(xuio
|| tx_bytes
== max_blksz
);
845 dmu_assign_arcbuf(sa_get_db(zp
->z_sa_hdl
),
848 ASSERT(tx_bytes
<= uio
->uio_resid
);
849 uioskip(uio
, tx_bytes
);
851 if (tx_bytes
&& zp
->z_is_mapped
&& !(ioflag
& O_DIRECT
)) {
852 update_pages(ip
, woff
,
853 tx_bytes
, zfsvfs
->z_os
, zp
->z_id
);
857 * If we made no progress, we're done. If we made even
858 * partial progress, update the znode and ZIL accordingly.
861 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_SIZE(zfsvfs
),
862 (void *)&zp
->z_size
, sizeof (uint64_t), tx
);
869 * Clear Set-UID/Set-GID bits on successful write if not
870 * privileged and at least one of the execute bits is set.
872 * It would be nice to to this after all writes have
873 * been done, but that would still expose the ISUID/ISGID
874 * to another app after the partial write is committed.
876 * Note: we don't call zfs_fuid_map_id() here because
877 * user 0 is not an ephemeral uid.
879 mutex_enter(&zp
->z_acl_lock
);
880 uid
= KUID_TO_SUID(ip
->i_uid
);
881 if ((zp
->z_mode
& (S_IXUSR
| (S_IXUSR
>> 3) |
882 (S_IXUSR
>> 6))) != 0 &&
883 (zp
->z_mode
& (S_ISUID
| S_ISGID
)) != 0 &&
884 secpolicy_vnode_setid_retain(cr
,
885 ((zp
->z_mode
& S_ISUID
) != 0 && uid
== 0)) != 0) {
887 zp
->z_mode
&= ~(S_ISUID
| S_ISGID
);
888 ip
->i_mode
= newmode
= zp
->z_mode
;
889 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_MODE(zfsvfs
),
890 (void *)&newmode
, sizeof (uint64_t), tx
);
892 mutex_exit(&zp
->z_acl_lock
);
894 zfs_tstamp_update_setup(zp
, CONTENT_MODIFIED
, mtime
, ctime
);
897 * Update the file size (zp_size) if it has changed;
898 * account for possible concurrent updates.
900 while ((end_size
= zp
->z_size
) < uio
->uio_loffset
) {
901 (void) atomic_cas_64(&zp
->z_size
, end_size
,
906 * If we are replaying and eof is non zero then force
907 * the file size to the specified eof. Note, there's no
908 * concurrency during replay.
910 if (zfsvfs
->z_replay
&& zfsvfs
->z_replay_eof
!= 0)
911 zp
->z_size
= zfsvfs
->z_replay_eof
;
913 error
= sa_bulk_update(zp
->z_sa_hdl
, bulk
, count
, tx
);
915 zfs_log_write(zilog
, tx
, TX_WRITE
, zp
, woff
, tx_bytes
, ioflag
,
921 ASSERT(tx_bytes
== nbytes
);
925 uio_prefaultpages(MIN(n
, max_blksz
), uio
);
928 zfs_inode_update(zp
);
929 zfs_range_unlock(rl
);
932 * If we're in replay mode, or we made no progress, return error.
933 * Otherwise, it's at least a partial write, so it's successful.
935 if (zfsvfs
->z_replay
|| uio
->uio_resid
== start_resid
) {
940 if (ioflag
& (FSYNC
| FDSYNC
) ||
941 zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
942 zil_commit(zilog
, zp
->z_id
);
949 * Drop a reference on the passed inode asynchronously. This ensures
950 * that the caller will never drop the last reference on an inode in
951 * the current context. Doing so while holding open a tx could result
952 * in a deadlock if iput_final() re-enters the filesystem code.
955 zfs_iput_async(struct inode
*ip
)
957 objset_t
*os
= ITOZSB(ip
)->z_os
;
959 ASSERT(atomic_read(&ip
->i_count
) > 0);
962 if (atomic_read(&ip
->i_count
) == 1)
963 VERIFY(taskq_dispatch(dsl_pool_iput_taskq(dmu_objset_pool(os
)),
964 (task_func_t
*)iput
, ip
, TQ_SLEEP
) != TASKQID_INVALID
);
970 zfs_get_done(zgd_t
*zgd
, int error
)
972 znode_t
*zp
= zgd
->zgd_private
;
975 dmu_buf_rele(zgd
->zgd_db
, zgd
);
977 zfs_range_unlock(zgd
->zgd_rl
);
980 * Release the vnode asynchronously as we currently have the
981 * txg stopped from syncing.
983 zfs_iput_async(ZTOI(zp
));
985 if (error
== 0 && zgd
->zgd_bp
)
986 zil_add_block(zgd
->zgd_zilog
, zgd
->zgd_bp
);
988 kmem_free(zgd
, sizeof (zgd_t
));
992 static int zil_fault_io
= 0;
996 * Get data to generate a TX_WRITE intent log record.
999 zfs_get_data(void *arg
, lr_write_t
*lr
, char *buf
, zio_t
*zio
)
1001 zfsvfs_t
*zfsvfs
= arg
;
1002 objset_t
*os
= zfsvfs
->z_os
;
1004 uint64_t object
= lr
->lr_foid
;
1005 uint64_t offset
= lr
->lr_offset
;
1006 uint64_t size
= lr
->lr_length
;
1011 ASSERT(zio
!= NULL
);
1015 * Nothing to do if the file has been removed
1017 if (zfs_zget(zfsvfs
, object
, &zp
) != 0)
1018 return (SET_ERROR(ENOENT
));
1019 if (zp
->z_unlinked
) {
1021 * Release the vnode asynchronously as we currently have the
1022 * txg stopped from syncing.
1024 zfs_iput_async(ZTOI(zp
));
1025 return (SET_ERROR(ENOENT
));
1028 zgd
= (zgd_t
*)kmem_zalloc(sizeof (zgd_t
), KM_SLEEP
);
1029 zgd
->zgd_zilog
= zfsvfs
->z_log
;
1030 zgd
->zgd_private
= zp
;
1033 * Write records come in two flavors: immediate and indirect.
1034 * For small writes it's cheaper to store the data with the
1035 * log record (immediate); for large writes it's cheaper to
1036 * sync the data and get a pointer to it (indirect) so that
1037 * we don't have to write the data twice.
1039 if (buf
!= NULL
) { /* immediate write */
1040 zgd
->zgd_rl
= zfs_range_lock(&zp
->z_range_lock
, offset
, size
,
1042 /* test for truncation needs to be done while range locked */
1043 if (offset
>= zp
->z_size
) {
1044 error
= SET_ERROR(ENOENT
);
1046 error
= dmu_read(os
, object
, offset
, size
, buf
,
1047 DMU_READ_NO_PREFETCH
);
1049 ASSERT(error
== 0 || error
== ENOENT
);
1050 } else { /* indirect write */
1052 * Have to lock the whole block to ensure when it's
1053 * written out and its checksum is being calculated
1054 * that no one can change the data. We need to re-check
1055 * blocksize after we get the lock in case it's changed!
1060 blkoff
= ISP2(size
) ? P2PHASE(offset
, size
) : offset
;
1062 zgd
->zgd_rl
= zfs_range_lock(&zp
->z_range_lock
, offset
,
1064 if (zp
->z_blksz
== size
)
1067 zfs_range_unlock(zgd
->zgd_rl
);
1069 /* test for truncation needs to be done while range locked */
1070 if (lr
->lr_offset
>= zp
->z_size
)
1071 error
= SET_ERROR(ENOENT
);
1074 error
= SET_ERROR(EIO
);
1079 error
= dmu_buf_hold(os
, object
, offset
, zgd
, &db
,
1080 DMU_READ_NO_PREFETCH
);
1083 blkptr_t
*bp
= &lr
->lr_blkptr
;
1088 ASSERT(db
->db_offset
== offset
);
1089 ASSERT(db
->db_size
== size
);
1091 error
= dmu_sync(zio
, lr
->lr_common
.lrc_txg
,
1093 ASSERT(error
|| lr
->lr_length
<= size
);
1096 * On success, we need to wait for the write I/O
1097 * initiated by dmu_sync() to complete before we can
1098 * release this dbuf. We will finish everything up
1099 * in the zfs_get_done() callback.
1104 if (error
== EALREADY
) {
1105 lr
->lr_common
.lrc_txtype
= TX_WRITE2
;
1111 zfs_get_done(zgd
, error
);
1118 zfs_access(struct inode
*ip
, int mode
, int flag
, cred_t
*cr
)
1120 znode_t
*zp
= ITOZ(ip
);
1121 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
1127 if (flag
& V_ACE_MASK
)
1128 error
= zfs_zaccess(zp
, mode
, flag
, B_FALSE
, cr
);
1130 error
= zfs_zaccess_rwx(zp
, mode
, flag
, cr
);
1137 * Lookup an entry in a directory, or an extended attribute directory.
1138 * If it exists, return a held inode reference for it.
1140 * IN: dip - inode of directory to search.
1141 * nm - name of entry to lookup.
1142 * flags - LOOKUP_XATTR set if looking for an attribute.
1143 * cr - credentials of caller.
1144 * direntflags - directory lookup flags
1145 * realpnp - returned pathname.
1147 * OUT: ipp - inode of located entry, NULL if not found.
1149 * RETURN: 0 on success, error code on failure.
1156 zfs_lookup(struct inode
*dip
, char *nm
, struct inode
**ipp
, int flags
,
1157 cred_t
*cr
, int *direntflags
, pathname_t
*realpnp
)
1159 znode_t
*zdp
= ITOZ(dip
);
1160 zfsvfs_t
*zfsvfs
= ITOZSB(dip
);
1164 * Fast path lookup, however we must skip DNLC lookup
1165 * for case folding or normalizing lookups because the
1166 * DNLC code only stores the passed in name. This means
1167 * creating 'a' and removing 'A' on a case insensitive
1168 * file system would work, but DNLC still thinks 'a'
1169 * exists and won't let you create it again on the next
1170 * pass through fast path.
1172 if (!(flags
& (LOOKUP_XATTR
| FIGNORECASE
))) {
1174 if (!S_ISDIR(dip
->i_mode
)) {
1175 return (SET_ERROR(ENOTDIR
));
1176 } else if (zdp
->z_sa_hdl
== NULL
) {
1177 return (SET_ERROR(EIO
));
1180 if (nm
[0] == 0 || (nm
[0] == '.' && nm
[1] == '\0')) {
1181 error
= zfs_fastaccesschk_execute(zdp
, cr
);
1189 } else if (!zdp
->z_zfsvfs
->z_norm
&&
1190 (zdp
->z_zfsvfs
->z_case
== ZFS_CASE_SENSITIVE
)) {
1192 vnode_t
*tvp
= dnlc_lookup(dvp
, nm
);
1195 error
= zfs_fastaccesschk_execute(zdp
, cr
);
1200 if (tvp
== DNLC_NO_VNODE
) {
1202 return (SET_ERROR(ENOENT
));
1205 return (specvp_check(vpp
, cr
));
1208 #endif /* HAVE_DNLC */
1217 if (flags
& LOOKUP_XATTR
) {
1219 * We don't allow recursive attributes..
1220 * Maybe someday we will.
1222 if (zdp
->z_pflags
& ZFS_XATTR
) {
1224 return (SET_ERROR(EINVAL
));
1227 if ((error
= zfs_get_xattrdir(zdp
, ipp
, cr
, flags
))) {
1233 * Do we have permission to get into attribute directory?
1236 if ((error
= zfs_zaccess(ITOZ(*ipp
), ACE_EXECUTE
, 0,
1246 if (!S_ISDIR(dip
->i_mode
)) {
1248 return (SET_ERROR(ENOTDIR
));
1252 * Check accessibility of directory.
1255 if ((error
= zfs_zaccess(zdp
, ACE_EXECUTE
, 0, B_FALSE
, cr
))) {
1260 if (zfsvfs
->z_utf8
&& u8_validate(nm
, strlen(nm
),
1261 NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
1263 return (SET_ERROR(EILSEQ
));
1266 error
= zfs_dirlook(zdp
, nm
, ipp
, flags
, direntflags
, realpnp
);
1267 if ((error
== 0) && (*ipp
))
1268 zfs_inode_update(ITOZ(*ipp
));
1275 * Attempt to create a new entry in a directory. If the entry
1276 * already exists, truncate the file if permissible, else return
1277 * an error. Return the ip of the created or trunc'd file.
1279 * IN: dip - inode of directory to put new file entry in.
1280 * name - name of new file entry.
1281 * vap - attributes of new file.
1282 * excl - flag indicating exclusive or non-exclusive mode.
1283 * mode - mode to open file with.
1284 * cr - credentials of caller.
1285 * flag - large file flag [UNUSED].
1286 * vsecp - ACL to be set
1288 * OUT: ipp - inode of created or trunc'd entry.
1290 * RETURN: 0 on success, error code on failure.
1293 * dip - ctime|mtime updated if new entry created
1294 * ip - ctime|mtime always, atime if new
1299 zfs_create(struct inode
*dip
, char *name
, vattr_t
*vap
, int excl
,
1300 int mode
, struct inode
**ipp
, cred_t
*cr
, int flag
, vsecattr_t
*vsecp
)
1302 znode_t
*zp
, *dzp
= ITOZ(dip
);
1303 zfsvfs_t
*zfsvfs
= ITOZSB(dip
);
1311 zfs_acl_ids_t acl_ids
;
1312 boolean_t fuid_dirtied
;
1313 boolean_t have_acl
= B_FALSE
;
1314 boolean_t waited
= B_FALSE
;
1317 * If we have an ephemeral id, ACL, or XVATTR then
1318 * make sure file system is at proper version
1324 if (zfsvfs
->z_use_fuids
== B_FALSE
&&
1325 (vsecp
|| IS_EPHEMERAL(uid
) || IS_EPHEMERAL(gid
)))
1326 return (SET_ERROR(EINVAL
));
1329 return (SET_ERROR(EINVAL
));
1334 zilog
= zfsvfs
->z_log
;
1336 if (zfsvfs
->z_utf8
&& u8_validate(name
, strlen(name
),
1337 NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
1339 return (SET_ERROR(EILSEQ
));
1342 if (vap
->va_mask
& ATTR_XVATTR
) {
1343 if ((error
= secpolicy_xvattr((xvattr_t
*)vap
,
1344 crgetuid(cr
), cr
, vap
->va_mode
)) != 0) {
1352 if (*name
== '\0') {
1354 * Null component name refers to the directory itself.
1361 /* possible igrab(zp) */
1364 if (flag
& FIGNORECASE
)
1367 error
= zfs_dirent_lock(&dl
, dzp
, name
, &zp
, zflg
,
1371 zfs_acl_ids_free(&acl_ids
);
1372 if (strcmp(name
, "..") == 0)
1373 error
= SET_ERROR(EISDIR
);
1383 * Create a new file object and update the directory
1386 if ((error
= zfs_zaccess(dzp
, ACE_ADD_FILE
, 0, B_FALSE
, cr
))) {
1388 zfs_acl_ids_free(&acl_ids
);
1393 * We only support the creation of regular files in
1394 * extended attribute directories.
1397 if ((dzp
->z_pflags
& ZFS_XATTR
) && !S_ISREG(vap
->va_mode
)) {
1399 zfs_acl_ids_free(&acl_ids
);
1400 error
= SET_ERROR(EINVAL
);
1404 if (!have_acl
&& (error
= zfs_acl_ids_create(dzp
, 0, vap
,
1405 cr
, vsecp
, &acl_ids
)) != 0)
1409 if (zfs_acl_ids_overquota(zfsvfs
, &acl_ids
)) {
1410 zfs_acl_ids_free(&acl_ids
);
1411 error
= SET_ERROR(EDQUOT
);
1415 tx
= dmu_tx_create(os
);
1417 dmu_tx_hold_sa_create(tx
, acl_ids
.z_aclp
->z_acl_bytes
+
1418 ZFS_SA_BASE_ATTR_SIZE
);
1420 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
1422 zfs_fuid_txhold(zfsvfs
, tx
);
1423 dmu_tx_hold_zap(tx
, dzp
->z_id
, TRUE
, name
);
1424 dmu_tx_hold_sa(tx
, dzp
->z_sa_hdl
, B_FALSE
);
1425 if (!zfsvfs
->z_use_sa
&&
1426 acl_ids
.z_aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
1427 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
,
1428 0, acl_ids
.z_aclp
->z_acl_bytes
);
1430 error
= dmu_tx_assign(tx
, waited
? TXG_WAITED
: TXG_NOWAIT
);
1432 zfs_dirent_unlock(dl
);
1433 if (error
== ERESTART
) {
1439 zfs_acl_ids_free(&acl_ids
);
1444 zfs_mknode(dzp
, vap
, tx
, cr
, 0, &zp
, &acl_ids
);
1447 zfs_fuid_sync(zfsvfs
, tx
);
1449 (void) zfs_link_create(dl
, zp
, tx
, ZNEW
);
1450 txtype
= zfs_log_create_txtype(Z_FILE
, vsecp
, vap
);
1451 if (flag
& FIGNORECASE
)
1453 zfs_log_create(zilog
, tx
, txtype
, dzp
, zp
, name
,
1454 vsecp
, acl_ids
.z_fuidp
, vap
);
1455 zfs_acl_ids_free(&acl_ids
);
1458 int aflags
= (flag
& FAPPEND
) ? V_APPEND
: 0;
1461 zfs_acl_ids_free(&acl_ids
);
1465 * A directory entry already exists for this name.
1468 * Can't truncate an existing file if in exclusive mode.
1471 error
= SET_ERROR(EEXIST
);
1475 * Can't open a directory for writing.
1477 if (S_ISDIR(ZTOI(zp
)->i_mode
)) {
1478 error
= SET_ERROR(EISDIR
);
1482 * Verify requested access to file.
1484 if (mode
&& (error
= zfs_zaccess_rwx(zp
, mode
, aflags
, cr
))) {
1488 mutex_enter(&dzp
->z_lock
);
1490 mutex_exit(&dzp
->z_lock
);
1493 * Truncate regular files if requested.
1495 if (S_ISREG(ZTOI(zp
)->i_mode
) &&
1496 (vap
->va_mask
& ATTR_SIZE
) && (vap
->va_size
== 0)) {
1497 /* we can't hold any locks when calling zfs_freesp() */
1499 zfs_dirent_unlock(dl
);
1502 error
= zfs_freesp(zp
, 0, 0, mode
, TRUE
);
1508 zfs_dirent_unlock(dl
);
1514 zfs_inode_update(dzp
);
1515 zfs_inode_update(zp
);
1519 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
1520 zil_commit(zilog
, 0);
1528 zfs_tmpfile(struct inode
*dip
, vattr_t
*vap
, int excl
,
1529 int mode
, struct inode
**ipp
, cred_t
*cr
, int flag
, vsecattr_t
*vsecp
)
1531 znode_t
*zp
= NULL
, *dzp
= ITOZ(dip
);
1532 zfsvfs_t
*zfsvfs
= ITOZSB(dip
);
1538 zfs_acl_ids_t acl_ids
;
1539 boolean_t fuid_dirtied
;
1540 boolean_t have_acl
= B_FALSE
;
1541 boolean_t waited
= B_FALSE
;
1544 * If we have an ephemeral id, ACL, or XVATTR then
1545 * make sure file system is at proper version
1551 if (zfsvfs
->z_use_fuids
== B_FALSE
&&
1552 (vsecp
|| IS_EPHEMERAL(uid
) || IS_EPHEMERAL(gid
)))
1553 return (SET_ERROR(EINVAL
));
1559 if (vap
->va_mask
& ATTR_XVATTR
) {
1560 if ((error
= secpolicy_xvattr((xvattr_t
*)vap
,
1561 crgetuid(cr
), cr
, vap
->va_mode
)) != 0) {
1571 * Create a new file object and update the directory
1574 if ((error
= zfs_zaccess(dzp
, ACE_ADD_FILE
, 0, B_FALSE
, cr
))) {
1576 zfs_acl_ids_free(&acl_ids
);
1580 if (!have_acl
&& (error
= zfs_acl_ids_create(dzp
, 0, vap
,
1581 cr
, vsecp
, &acl_ids
)) != 0)
1585 if (zfs_acl_ids_overquota(zfsvfs
, &acl_ids
)) {
1586 zfs_acl_ids_free(&acl_ids
);
1587 error
= SET_ERROR(EDQUOT
);
1591 tx
= dmu_tx_create(os
);
1593 dmu_tx_hold_sa_create(tx
, acl_ids
.z_aclp
->z_acl_bytes
+
1594 ZFS_SA_BASE_ATTR_SIZE
);
1595 dmu_tx_hold_zap(tx
, zfsvfs
->z_unlinkedobj
, FALSE
, NULL
);
1597 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
1599 zfs_fuid_txhold(zfsvfs
, tx
);
1600 if (!zfsvfs
->z_use_sa
&&
1601 acl_ids
.z_aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
1602 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
,
1603 0, acl_ids
.z_aclp
->z_acl_bytes
);
1605 error
= dmu_tx_assign(tx
, waited
? TXG_WAITED
: TXG_NOWAIT
);
1607 if (error
== ERESTART
) {
1613 zfs_acl_ids_free(&acl_ids
);
1618 zfs_mknode(dzp
, vap
, tx
, cr
, IS_TMPFILE
, &zp
, &acl_ids
);
1621 zfs_fuid_sync(zfsvfs
, tx
);
1623 /* Add to unlinked set */
1625 zfs_unlinked_add(zp
, tx
);
1626 zfs_acl_ids_free(&acl_ids
);
1634 zfs_inode_update(dzp
);
1635 zfs_inode_update(zp
);
1644 * Remove an entry from a directory.
1646 * IN: dip - inode of directory to remove entry from.
1647 * name - name of entry to remove.
1648 * cr - credentials of caller.
1650 * RETURN: 0 if success
1651 * error code if failure
1655 * ip - ctime (if nlink > 0)
1658 uint64_t null_xattr
= 0;
1662 zfs_remove(struct inode
*dip
, char *name
, cred_t
*cr
, int flags
)
1664 znode_t
*zp
, *dzp
= ITOZ(dip
);
1667 zfsvfs_t
*zfsvfs
= ITOZSB(dip
);
1669 uint64_t acl_obj
, xattr_obj
;
1670 uint64_t xattr_obj_unlinked
= 0;
1675 boolean_t may_delete_now
, delete_now
= FALSE
;
1676 boolean_t unlinked
, toobig
= FALSE
;
1678 pathname_t
*realnmp
= NULL
;
1682 boolean_t waited
= B_FALSE
;
1685 return (SET_ERROR(EINVAL
));
1689 zilog
= zfsvfs
->z_log
;
1691 if (flags
& FIGNORECASE
) {
1701 * Attempt to lock directory; fail if entry doesn't exist.
1703 if ((error
= zfs_dirent_lock(&dl
, dzp
, name
, &zp
, zflg
,
1713 if ((error
= zfs_zaccess_delete(dzp
, zp
, cr
))) {
1718 * Need to use rmdir for removing directories.
1720 if (S_ISDIR(ip
->i_mode
)) {
1721 error
= SET_ERROR(EPERM
);
1727 dnlc_remove(dvp
, realnmp
->pn_buf
);
1729 dnlc_remove(dvp
, name
);
1730 #endif /* HAVE_DNLC */
1732 mutex_enter(&zp
->z_lock
);
1733 may_delete_now
= atomic_read(&ip
->i_count
) == 1 && !(zp
->z_is_mapped
);
1734 mutex_exit(&zp
->z_lock
);
1737 * We may delete the znode now, or we may put it in the unlinked set;
1738 * it depends on whether we're the last link, and on whether there are
1739 * other holds on the inode. So we dmu_tx_hold() the right things to
1740 * allow for either case.
1743 tx
= dmu_tx_create(zfsvfs
->z_os
);
1744 dmu_tx_hold_zap(tx
, dzp
->z_id
, FALSE
, name
);
1745 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
1746 zfs_sa_upgrade_txholds(tx
, zp
);
1747 zfs_sa_upgrade_txholds(tx
, dzp
);
1748 if (may_delete_now
) {
1749 toobig
= zp
->z_size
> zp
->z_blksz
* zfs_delete_blocks
;
1750 /* if the file is too big, only hold_free a token amount */
1751 dmu_tx_hold_free(tx
, zp
->z_id
, 0,
1752 (toobig
? DMU_MAX_ACCESS
: DMU_OBJECT_END
));
1755 /* are there any extended attributes? */
1756 error
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_XATTR(zfsvfs
),
1757 &xattr_obj
, sizeof (xattr_obj
));
1758 if (error
== 0 && xattr_obj
) {
1759 error
= zfs_zget(zfsvfs
, xattr_obj
, &xzp
);
1761 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_TRUE
);
1762 dmu_tx_hold_sa(tx
, xzp
->z_sa_hdl
, B_FALSE
);
1765 mutex_enter(&zp
->z_lock
);
1766 if ((acl_obj
= zfs_external_acl(zp
)) != 0 && may_delete_now
)
1767 dmu_tx_hold_free(tx
, acl_obj
, 0, DMU_OBJECT_END
);
1768 mutex_exit(&zp
->z_lock
);
1770 /* charge as an update -- would be nice not to charge at all */
1771 dmu_tx_hold_zap(tx
, zfsvfs
->z_unlinkedobj
, FALSE
, NULL
);
1774 * Mark this transaction as typically resulting in a net free of space
1776 dmu_tx_mark_netfree(tx
);
1778 error
= dmu_tx_assign(tx
, waited
? TXG_WAITED
: TXG_NOWAIT
);
1780 zfs_dirent_unlock(dl
);
1781 if (error
== ERESTART
) {
1801 * Remove the directory entry.
1803 error
= zfs_link_destroy(dl
, zp
, tx
, zflg
, &unlinked
);
1812 * Hold z_lock so that we can make sure that the ACL obj
1813 * hasn't changed. Could have been deleted due to
1816 mutex_enter(&zp
->z_lock
);
1817 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_XATTR(zfsvfs
),
1818 &xattr_obj_unlinked
, sizeof (xattr_obj_unlinked
));
1819 delete_now
= may_delete_now
&& !toobig
&&
1820 atomic_read(&ip
->i_count
) == 1 && !(zp
->z_is_mapped
) &&
1821 xattr_obj
== xattr_obj_unlinked
&& zfs_external_acl(zp
) ==
1826 if (xattr_obj_unlinked
) {
1827 ASSERT3U(ZTOI(xzp
)->i_nlink
, ==, 2);
1828 mutex_enter(&xzp
->z_lock
);
1829 xzp
->z_unlinked
= 1;
1830 clear_nlink(ZTOI(xzp
));
1832 error
= sa_update(xzp
->z_sa_hdl
, SA_ZPL_LINKS(zfsvfs
),
1833 &links
, sizeof (links
), tx
);
1834 ASSERT3U(error
, ==, 0);
1835 mutex_exit(&xzp
->z_lock
);
1836 zfs_unlinked_add(xzp
, tx
);
1839 error
= sa_remove(zp
->z_sa_hdl
,
1840 SA_ZPL_XATTR(zfsvfs
), tx
);
1842 error
= sa_update(zp
->z_sa_hdl
,
1843 SA_ZPL_XATTR(zfsvfs
), &null_xattr
,
1844 sizeof (uint64_t), tx
);
1848 * Add to the unlinked set because a new reference could be
1849 * taken concurrently resulting in a deferred destruction.
1851 zfs_unlinked_add(zp
, tx
);
1852 mutex_exit(&zp
->z_lock
);
1853 } else if (unlinked
) {
1854 mutex_exit(&zp
->z_lock
);
1855 zfs_unlinked_add(zp
, tx
);
1859 if (flags
& FIGNORECASE
)
1861 zfs_log_remove(zilog
, tx
, txtype
, dzp
, name
, obj
);
1868 zfs_dirent_unlock(dl
);
1869 zfs_inode_update(dzp
);
1870 zfs_inode_update(zp
);
1878 zfs_inode_update(xzp
);
1879 zfs_iput_async(ZTOI(xzp
));
1882 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
1883 zil_commit(zilog
, 0);
1890 * Create a new directory and insert it into dip using the name
1891 * provided. Return a pointer to the inserted directory.
1893 * IN: dip - inode of directory to add subdir to.
1894 * dirname - name of new directory.
1895 * vap - attributes of new directory.
1896 * cr - credentials of caller.
1897 * vsecp - ACL to be set
1899 * OUT: ipp - inode of created directory.
1901 * RETURN: 0 if success
1902 * error code if failure
1905 * dip - ctime|mtime updated
1906 * ipp - ctime|mtime|atime updated
1910 zfs_mkdir(struct inode
*dip
, char *dirname
, vattr_t
*vap
, struct inode
**ipp
,
1911 cred_t
*cr
, int flags
, vsecattr_t
*vsecp
)
1913 znode_t
*zp
, *dzp
= ITOZ(dip
);
1914 zfsvfs_t
*zfsvfs
= ITOZSB(dip
);
1922 gid_t gid
= crgetgid(cr
);
1923 zfs_acl_ids_t acl_ids
;
1924 boolean_t fuid_dirtied
;
1925 boolean_t waited
= B_FALSE
;
1927 ASSERT(S_ISDIR(vap
->va_mode
));
1930 * If we have an ephemeral id, ACL, or XVATTR then
1931 * make sure file system is at proper version
1935 if (zfsvfs
->z_use_fuids
== B_FALSE
&&
1936 (vsecp
|| IS_EPHEMERAL(uid
) || IS_EPHEMERAL(gid
)))
1937 return (SET_ERROR(EINVAL
));
1939 if (dirname
== NULL
)
1940 return (SET_ERROR(EINVAL
));
1944 zilog
= zfsvfs
->z_log
;
1946 if (dzp
->z_pflags
& ZFS_XATTR
) {
1948 return (SET_ERROR(EINVAL
));
1951 if (zfsvfs
->z_utf8
&& u8_validate(dirname
,
1952 strlen(dirname
), NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
1954 return (SET_ERROR(EILSEQ
));
1956 if (flags
& FIGNORECASE
)
1959 if (vap
->va_mask
& ATTR_XVATTR
) {
1960 if ((error
= secpolicy_xvattr((xvattr_t
*)vap
,
1961 crgetuid(cr
), cr
, vap
->va_mode
)) != 0) {
1967 if ((error
= zfs_acl_ids_create(dzp
, 0, vap
, cr
,
1968 vsecp
, &acl_ids
)) != 0) {
1973 * First make sure the new directory doesn't exist.
1975 * Existence is checked first to make sure we don't return
1976 * EACCES instead of EEXIST which can cause some applications
1982 if ((error
= zfs_dirent_lock(&dl
, dzp
, dirname
, &zp
, zf
,
1984 zfs_acl_ids_free(&acl_ids
);
1989 if ((error
= zfs_zaccess(dzp
, ACE_ADD_SUBDIRECTORY
, 0, B_FALSE
, cr
))) {
1990 zfs_acl_ids_free(&acl_ids
);
1991 zfs_dirent_unlock(dl
);
1996 if (zfs_acl_ids_overquota(zfsvfs
, &acl_ids
)) {
1997 zfs_acl_ids_free(&acl_ids
);
1998 zfs_dirent_unlock(dl
);
2000 return (SET_ERROR(EDQUOT
));
2004 * Add a new entry to the directory.
2006 tx
= dmu_tx_create(zfsvfs
->z_os
);
2007 dmu_tx_hold_zap(tx
, dzp
->z_id
, TRUE
, dirname
);
2008 dmu_tx_hold_zap(tx
, DMU_NEW_OBJECT
, FALSE
, NULL
);
2009 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
2011 zfs_fuid_txhold(zfsvfs
, tx
);
2012 if (!zfsvfs
->z_use_sa
&& acl_ids
.z_aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
2013 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
, 0,
2014 acl_ids
.z_aclp
->z_acl_bytes
);
2017 dmu_tx_hold_sa_create(tx
, acl_ids
.z_aclp
->z_acl_bytes
+
2018 ZFS_SA_BASE_ATTR_SIZE
);
2020 error
= dmu_tx_assign(tx
, waited
? TXG_WAITED
: TXG_NOWAIT
);
2022 zfs_dirent_unlock(dl
);
2023 if (error
== ERESTART
) {
2029 zfs_acl_ids_free(&acl_ids
);
2038 zfs_mknode(dzp
, vap
, tx
, cr
, 0, &zp
, &acl_ids
);
2041 zfs_fuid_sync(zfsvfs
, tx
);
2044 * Now put new name in parent dir.
2046 (void) zfs_link_create(dl
, zp
, tx
, ZNEW
);
2050 txtype
= zfs_log_create_txtype(Z_DIR
, vsecp
, vap
);
2051 if (flags
& FIGNORECASE
)
2053 zfs_log_create(zilog
, tx
, txtype
, dzp
, zp
, dirname
, vsecp
,
2054 acl_ids
.z_fuidp
, vap
);
2056 zfs_acl_ids_free(&acl_ids
);
2060 zfs_dirent_unlock(dl
);
2062 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
2063 zil_commit(zilog
, 0);
2065 zfs_inode_update(dzp
);
2066 zfs_inode_update(zp
);
2072 * Remove a directory subdir entry. If the current working
2073 * directory is the same as the subdir to be removed, the
2076 * IN: dip - inode of directory to remove from.
2077 * name - name of directory to be removed.
2078 * cwd - inode of current working directory.
2079 * cr - credentials of caller.
2080 * flags - case flags
2082 * RETURN: 0 on success, error code on failure.
2085 * dip - ctime|mtime updated
2089 zfs_rmdir(struct inode
*dip
, char *name
, struct inode
*cwd
, cred_t
*cr
,
2092 znode_t
*dzp
= ITOZ(dip
);
2095 zfsvfs_t
*zfsvfs
= ITOZSB(dip
);
2101 boolean_t waited
= B_FALSE
;
2104 return (SET_ERROR(EINVAL
));
2108 zilog
= zfsvfs
->z_log
;
2110 if (flags
& FIGNORECASE
)
2116 * Attempt to lock directory; fail if entry doesn't exist.
2118 if ((error
= zfs_dirent_lock(&dl
, dzp
, name
, &zp
, zflg
,
2126 if ((error
= zfs_zaccess_delete(dzp
, zp
, cr
))) {
2130 if (!S_ISDIR(ip
->i_mode
)) {
2131 error
= SET_ERROR(ENOTDIR
);
2136 error
= SET_ERROR(EINVAL
);
2141 * Grab a lock on the directory to make sure that no one is
2142 * trying to add (or lookup) entries while we are removing it.
2144 rw_enter(&zp
->z_name_lock
, RW_WRITER
);
2147 * Grab a lock on the parent pointer to make sure we play well
2148 * with the treewalk and directory rename code.
2150 rw_enter(&zp
->z_parent_lock
, RW_WRITER
);
2152 tx
= dmu_tx_create(zfsvfs
->z_os
);
2153 dmu_tx_hold_zap(tx
, dzp
->z_id
, FALSE
, name
);
2154 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
2155 dmu_tx_hold_zap(tx
, zfsvfs
->z_unlinkedobj
, FALSE
, NULL
);
2156 zfs_sa_upgrade_txholds(tx
, zp
);
2157 zfs_sa_upgrade_txholds(tx
, dzp
);
2158 dmu_tx_mark_netfree(tx
);
2159 error
= dmu_tx_assign(tx
, waited
? TXG_WAITED
: TXG_NOWAIT
);
2161 rw_exit(&zp
->z_parent_lock
);
2162 rw_exit(&zp
->z_name_lock
);
2163 zfs_dirent_unlock(dl
);
2164 if (error
== ERESTART
) {
2177 error
= zfs_link_destroy(dl
, zp
, tx
, zflg
, NULL
);
2180 uint64_t txtype
= TX_RMDIR
;
2181 if (flags
& FIGNORECASE
)
2183 zfs_log_remove(zilog
, tx
, txtype
, dzp
, name
, ZFS_NO_OBJECT
);
2188 rw_exit(&zp
->z_parent_lock
);
2189 rw_exit(&zp
->z_name_lock
);
2191 zfs_dirent_unlock(dl
);
2193 zfs_inode_update(dzp
);
2194 zfs_inode_update(zp
);
2197 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
2198 zil_commit(zilog
, 0);
2205 * Read as many directory entries as will fit into the provided
2206 * dirent buffer from the given directory cursor position.
2208 * IN: ip - inode of directory to read.
2209 * dirent - buffer for directory entries.
2211 * OUT: dirent - filler buffer of directory entries.
2213 * RETURN: 0 if success
2214 * error code if failure
2217 * ip - atime updated
2219 * Note that the low 4 bits of the cookie returned by zap is always zero.
2220 * This allows us to use the low range for "special" directory entries:
2221 * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem,
2222 * we use the offset 2 for the '.zfs' directory.
2226 zfs_readdir(struct inode
*ip
, struct dir_context
*ctx
, cred_t
*cr
)
2228 znode_t
*zp
= ITOZ(ip
);
2229 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
2232 zap_attribute_t zap
;
2238 uint64_t offset
; /* must be unsigned; checks for < 1 */
2243 if ((error
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_PARENT(zfsvfs
),
2244 &parent
, sizeof (parent
))) != 0)
2248 * Quit if directory has been removed (posix)
2256 prefetch
= zp
->z_zn_prefetch
;
2259 * Initialize the iterator cursor.
2263 * Start iteration from the beginning of the directory.
2265 zap_cursor_init(&zc
, os
, zp
->z_id
);
2268 * The offset is a serialized cursor.
2270 zap_cursor_init_serialized(&zc
, os
, zp
->z_id
, offset
);
2274 * Transform to file-system independent format
2279 * Special case `.', `..', and `.zfs'.
2282 (void) strcpy(zap
.za_name
, ".");
2283 zap
.za_normalization_conflict
= 0;
2286 } else if (offset
== 1) {
2287 (void) strcpy(zap
.za_name
, "..");
2288 zap
.za_normalization_conflict
= 0;
2291 } else if (offset
== 2 && zfs_show_ctldir(zp
)) {
2292 (void) strcpy(zap
.za_name
, ZFS_CTLDIR_NAME
);
2293 zap
.za_normalization_conflict
= 0;
2294 objnum
= ZFSCTL_INO_ROOT
;
2300 if ((error
= zap_cursor_retrieve(&zc
, &zap
))) {
2301 if (error
== ENOENT
)
2308 * Allow multiple entries provided the first entry is
2309 * the object id. Non-zpl consumers may safely make
2310 * use of the additional space.
2312 * XXX: This should be a feature flag for compatibility
2314 if (zap
.za_integer_length
!= 8 ||
2315 zap
.za_num_integers
== 0) {
2316 cmn_err(CE_WARN
, "zap_readdir: bad directory "
2317 "entry, obj = %lld, offset = %lld, "
2318 "length = %d, num = %lld\n",
2319 (u_longlong_t
)zp
->z_id
,
2320 (u_longlong_t
)offset
,
2321 zap
.za_integer_length
,
2322 (u_longlong_t
)zap
.za_num_integers
);
2323 error
= SET_ERROR(ENXIO
);
2327 objnum
= ZFS_DIRENT_OBJ(zap
.za_first_integer
);
2328 type
= ZFS_DIRENT_TYPE(zap
.za_first_integer
);
2331 done
= !dir_emit(ctx
, zap
.za_name
, strlen(zap
.za_name
),
2336 /* Prefetch znode */
2338 dmu_prefetch(os
, objnum
, 0, 0, 0,
2339 ZIO_PRIORITY_SYNC_READ
);
2343 * Move to the next entry, fill in the previous offset.
2345 if (offset
> 2 || (offset
== 2 && !zfs_show_ctldir(zp
))) {
2346 zap_cursor_advance(&zc
);
2347 offset
= zap_cursor_serialize(&zc
);
2353 zp
->z_zn_prefetch
= B_FALSE
; /* a lookup will re-enable pre-fetching */
2356 zap_cursor_fini(&zc
);
2357 if (error
== ENOENT
)
2365 ulong_t zfs_fsync_sync_cnt
= 4;
2368 zfs_fsync(struct inode
*ip
, int syncflag
, cred_t
*cr
)
2370 znode_t
*zp
= ITOZ(ip
);
2371 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
2373 (void) tsd_set(zfs_fsyncer_key
, (void *)zfs_fsync_sync_cnt
);
2375 if (zfsvfs
->z_os
->os_sync
!= ZFS_SYNC_DISABLED
) {
2378 zil_commit(zfsvfs
->z_log
, zp
->z_id
);
2381 tsd_set(zfs_fsyncer_key
, NULL
);
2388 * Get the requested file attributes and place them in the provided
2391 * IN: ip - inode of file.
2392 * vap - va_mask identifies requested attributes.
2393 * If ATTR_XVATTR set, then optional attrs are requested
2394 * flags - ATTR_NOACLCHECK (CIFS server context)
2395 * cr - credentials of caller.
2397 * OUT: vap - attribute values.
2399 * RETURN: 0 (always succeeds)
2403 zfs_getattr(struct inode
*ip
, vattr_t
*vap
, int flags
, cred_t
*cr
)
2405 znode_t
*zp
= ITOZ(ip
);
2406 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
2409 uint64_t atime
[2], mtime
[2], ctime
[2];
2410 xvattr_t
*xvap
= (xvattr_t
*)vap
; /* vap may be an xvattr_t * */
2411 xoptattr_t
*xoap
= NULL
;
2412 boolean_t skipaclchk
= (flags
& ATTR_NOACLCHECK
) ? B_TRUE
: B_FALSE
;
2413 sa_bulk_attr_t bulk
[3];
2419 zfs_fuid_map_ids(zp
, cr
, &vap
->va_uid
, &vap
->va_gid
);
2421 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_ATIME(zfsvfs
), NULL
, &atime
, 16);
2422 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
, &mtime
, 16);
2423 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
, &ctime
, 16);
2425 if ((error
= sa_bulk_lookup(zp
->z_sa_hdl
, bulk
, count
)) != 0) {
2431 * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES.
2432 * Also, if we are the owner don't bother, since owner should
2433 * always be allowed to read basic attributes of file.
2435 if (!(zp
->z_pflags
& ZFS_ACL_TRIVIAL
) &&
2436 (vap
->va_uid
!= crgetuid(cr
))) {
2437 if ((error
= zfs_zaccess(zp
, ACE_READ_ATTRIBUTES
, 0,
2445 * Return all attributes. It's cheaper to provide the answer
2446 * than to determine whether we were asked the question.
2449 mutex_enter(&zp
->z_lock
);
2450 vap
->va_type
= vn_mode_to_vtype(zp
->z_mode
);
2451 vap
->va_mode
= zp
->z_mode
;
2452 vap
->va_fsid
= ZTOI(zp
)->i_sb
->s_dev
;
2453 vap
->va_nodeid
= zp
->z_id
;
2454 if ((zp
->z_id
== zfsvfs
->z_root
) && zfs_show_ctldir(zp
))
2455 links
= ZTOI(zp
)->i_nlink
+ 1;
2457 links
= ZTOI(zp
)->i_nlink
;
2458 vap
->va_nlink
= MIN(links
, ZFS_LINK_MAX
);
2459 vap
->va_size
= i_size_read(ip
);
2460 vap
->va_rdev
= ip
->i_rdev
;
2461 vap
->va_seq
= ip
->i_generation
;
2464 * Add in any requested optional attributes and the create time.
2465 * Also set the corresponding bits in the returned attribute bitmap.
2467 if ((xoap
= xva_getxoptattr(xvap
)) != NULL
&& zfsvfs
->z_use_fuids
) {
2468 if (XVA_ISSET_REQ(xvap
, XAT_ARCHIVE
)) {
2470 ((zp
->z_pflags
& ZFS_ARCHIVE
) != 0);
2471 XVA_SET_RTN(xvap
, XAT_ARCHIVE
);
2474 if (XVA_ISSET_REQ(xvap
, XAT_READONLY
)) {
2475 xoap
->xoa_readonly
=
2476 ((zp
->z_pflags
& ZFS_READONLY
) != 0);
2477 XVA_SET_RTN(xvap
, XAT_READONLY
);
2480 if (XVA_ISSET_REQ(xvap
, XAT_SYSTEM
)) {
2482 ((zp
->z_pflags
& ZFS_SYSTEM
) != 0);
2483 XVA_SET_RTN(xvap
, XAT_SYSTEM
);
2486 if (XVA_ISSET_REQ(xvap
, XAT_HIDDEN
)) {
2488 ((zp
->z_pflags
& ZFS_HIDDEN
) != 0);
2489 XVA_SET_RTN(xvap
, XAT_HIDDEN
);
2492 if (XVA_ISSET_REQ(xvap
, XAT_NOUNLINK
)) {
2493 xoap
->xoa_nounlink
=
2494 ((zp
->z_pflags
& ZFS_NOUNLINK
) != 0);
2495 XVA_SET_RTN(xvap
, XAT_NOUNLINK
);
2498 if (XVA_ISSET_REQ(xvap
, XAT_IMMUTABLE
)) {
2499 xoap
->xoa_immutable
=
2500 ((zp
->z_pflags
& ZFS_IMMUTABLE
) != 0);
2501 XVA_SET_RTN(xvap
, XAT_IMMUTABLE
);
2504 if (XVA_ISSET_REQ(xvap
, XAT_APPENDONLY
)) {
2505 xoap
->xoa_appendonly
=
2506 ((zp
->z_pflags
& ZFS_APPENDONLY
) != 0);
2507 XVA_SET_RTN(xvap
, XAT_APPENDONLY
);
2510 if (XVA_ISSET_REQ(xvap
, XAT_NODUMP
)) {
2512 ((zp
->z_pflags
& ZFS_NODUMP
) != 0);
2513 XVA_SET_RTN(xvap
, XAT_NODUMP
);
2516 if (XVA_ISSET_REQ(xvap
, XAT_OPAQUE
)) {
2518 ((zp
->z_pflags
& ZFS_OPAQUE
) != 0);
2519 XVA_SET_RTN(xvap
, XAT_OPAQUE
);
2522 if (XVA_ISSET_REQ(xvap
, XAT_AV_QUARANTINED
)) {
2523 xoap
->xoa_av_quarantined
=
2524 ((zp
->z_pflags
& ZFS_AV_QUARANTINED
) != 0);
2525 XVA_SET_RTN(xvap
, XAT_AV_QUARANTINED
);
2528 if (XVA_ISSET_REQ(xvap
, XAT_AV_MODIFIED
)) {
2529 xoap
->xoa_av_modified
=
2530 ((zp
->z_pflags
& ZFS_AV_MODIFIED
) != 0);
2531 XVA_SET_RTN(xvap
, XAT_AV_MODIFIED
);
2534 if (XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
) &&
2535 S_ISREG(ip
->i_mode
)) {
2536 zfs_sa_get_scanstamp(zp
, xvap
);
2539 if (XVA_ISSET_REQ(xvap
, XAT_CREATETIME
)) {
2542 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_CRTIME(zfsvfs
),
2543 times
, sizeof (times
));
2544 ZFS_TIME_DECODE(&xoap
->xoa_createtime
, times
);
2545 XVA_SET_RTN(xvap
, XAT_CREATETIME
);
2548 if (XVA_ISSET_REQ(xvap
, XAT_REPARSE
)) {
2549 xoap
->xoa_reparse
= ((zp
->z_pflags
& ZFS_REPARSE
) != 0);
2550 XVA_SET_RTN(xvap
, XAT_REPARSE
);
2552 if (XVA_ISSET_REQ(xvap
, XAT_GEN
)) {
2553 xoap
->xoa_generation
= ip
->i_generation
;
2554 XVA_SET_RTN(xvap
, XAT_GEN
);
2557 if (XVA_ISSET_REQ(xvap
, XAT_OFFLINE
)) {
2559 ((zp
->z_pflags
& ZFS_OFFLINE
) != 0);
2560 XVA_SET_RTN(xvap
, XAT_OFFLINE
);
2563 if (XVA_ISSET_REQ(xvap
, XAT_SPARSE
)) {
2565 ((zp
->z_pflags
& ZFS_SPARSE
) != 0);
2566 XVA_SET_RTN(xvap
, XAT_SPARSE
);
2570 ZFS_TIME_DECODE(&vap
->va_atime
, atime
);
2571 ZFS_TIME_DECODE(&vap
->va_mtime
, mtime
);
2572 ZFS_TIME_DECODE(&vap
->va_ctime
, ctime
);
2574 mutex_exit(&zp
->z_lock
);
2576 sa_object_size(zp
->z_sa_hdl
, &vap
->va_blksize
, &vap
->va_nblocks
);
2578 if (zp
->z_blksz
== 0) {
2580 * Block size hasn't been set; suggest maximal I/O transfers.
2582 vap
->va_blksize
= zfsvfs
->z_max_blksz
;
2590 * Get the basic file attributes and place them in the provided kstat
2591 * structure. The inode is assumed to be the authoritative source
2592 * for most of the attributes. However, the znode currently has the
2593 * authoritative atime, blksize, and block count.
2595 * IN: ip - inode of file.
2597 * OUT: sp - kstat values.
2599 * RETURN: 0 (always succeeds)
2603 zfs_getattr_fast(struct inode
*ip
, struct kstat
*sp
)
2605 znode_t
*zp
= ITOZ(ip
);
2606 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
2608 u_longlong_t nblocks
;
2613 mutex_enter(&zp
->z_lock
);
2615 generic_fillattr(ip
, sp
);
2617 sa_object_size(zp
->z_sa_hdl
, &blksize
, &nblocks
);
2618 sp
->blksize
= blksize
;
2619 sp
->blocks
= nblocks
;
2621 if (unlikely(zp
->z_blksz
== 0)) {
2623 * Block size hasn't been set; suggest maximal I/O transfers.
2625 sp
->blksize
= zfsvfs
->z_max_blksz
;
2628 mutex_exit(&zp
->z_lock
);
2631 * Required to prevent NFS client from detecting different inode
2632 * numbers of snapshot root dentry before and after snapshot mount.
2634 if (zfsvfs
->z_issnap
) {
2635 if (ip
->i_sb
->s_root
->d_inode
== ip
)
2636 sp
->ino
= ZFSCTL_INO_SNAPDIRS
-
2637 dmu_objset_id(zfsvfs
->z_os
);
2646 * Set the file attributes to the values contained in the
2649 * IN: ip - inode of file to be modified.
2650 * vap - new attribute values.
2651 * If ATTR_XVATTR set, then optional attrs are being set
2652 * flags - ATTR_UTIME set if non-default time values provided.
2653 * - ATTR_NOACLCHECK (CIFS context only).
2654 * cr - credentials of caller.
2656 * RETURN: 0 if success
2657 * error code if failure
2660 * ip - ctime updated, mtime updated if size changed.
2664 zfs_setattr(struct inode
*ip
, vattr_t
*vap
, int flags
, cred_t
*cr
)
2666 znode_t
*zp
= ITOZ(ip
);
2667 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
2671 xvattr_t
*tmpxvattr
;
2672 uint_t mask
= vap
->va_mask
;
2673 uint_t saved_mask
= 0;
2676 uint64_t new_kuid
= 0, new_kgid
= 0, new_uid
, new_gid
;
2678 uint64_t mtime
[2], ctime
[2], atime
[2];
2680 int need_policy
= FALSE
;
2682 zfs_fuid_info_t
*fuidp
= NULL
;
2683 xvattr_t
*xvap
= (xvattr_t
*)vap
; /* vap may be an xvattr_t * */
2686 boolean_t skipaclchk
= (flags
& ATTR_NOACLCHECK
) ? B_TRUE
: B_FALSE
;
2687 boolean_t fuid_dirtied
= B_FALSE
;
2688 sa_bulk_attr_t
*bulk
, *xattr_bulk
;
2689 int count
= 0, xattr_count
= 0;
2697 zilog
= zfsvfs
->z_log
;
2700 * Make sure that if we have ephemeral uid/gid or xvattr specified
2701 * that file system is at proper version level
2704 if (zfsvfs
->z_use_fuids
== B_FALSE
&&
2705 (((mask
& ATTR_UID
) && IS_EPHEMERAL(vap
->va_uid
)) ||
2706 ((mask
& ATTR_GID
) && IS_EPHEMERAL(vap
->va_gid
)) ||
2707 (mask
& ATTR_XVATTR
))) {
2709 return (SET_ERROR(EINVAL
));
2712 if (mask
& ATTR_SIZE
&& S_ISDIR(ip
->i_mode
)) {
2714 return (SET_ERROR(EISDIR
));
2717 if (mask
& ATTR_SIZE
&& !S_ISREG(ip
->i_mode
) && !S_ISFIFO(ip
->i_mode
)) {
2719 return (SET_ERROR(EINVAL
));
2723 * If this is an xvattr_t, then get a pointer to the structure of
2724 * optional attributes. If this is NULL, then we have a vattr_t.
2726 xoap
= xva_getxoptattr(xvap
);
2728 tmpxvattr
= kmem_alloc(sizeof (xvattr_t
), KM_SLEEP
);
2729 xva_init(tmpxvattr
);
2731 bulk
= kmem_alloc(sizeof (sa_bulk_attr_t
) * 7, KM_SLEEP
);
2732 xattr_bulk
= kmem_alloc(sizeof (sa_bulk_attr_t
) * 7, KM_SLEEP
);
2735 * Immutable files can only alter immutable bit and atime
2737 if ((zp
->z_pflags
& ZFS_IMMUTABLE
) &&
2738 ((mask
& (ATTR_SIZE
|ATTR_UID
|ATTR_GID
|ATTR_MTIME
|ATTR_MODE
)) ||
2739 ((mask
& ATTR_XVATTR
) && XVA_ISSET_REQ(xvap
, XAT_CREATETIME
)))) {
2744 if ((mask
& ATTR_SIZE
) && (zp
->z_pflags
& ZFS_READONLY
)) {
2750 * Verify timestamps doesn't overflow 32 bits.
2751 * ZFS can handle large timestamps, but 32bit syscalls can't
2752 * handle times greater than 2039. This check should be removed
2753 * once large timestamps are fully supported.
2755 if (mask
& (ATTR_ATIME
| ATTR_MTIME
)) {
2756 if (((mask
& ATTR_ATIME
) &&
2757 TIMESPEC_OVERFLOW(&vap
->va_atime
)) ||
2758 ((mask
& ATTR_MTIME
) &&
2759 TIMESPEC_OVERFLOW(&vap
->va_mtime
))) {
2769 /* Can this be moved to before the top label? */
2770 if (zfs_is_readonly(zfsvfs
)) {
2776 * First validate permissions
2779 if (mask
& ATTR_SIZE
) {
2780 err
= zfs_zaccess(zp
, ACE_WRITE_DATA
, 0, skipaclchk
, cr
);
2785 * XXX - Note, we are not providing any open
2786 * mode flags here (like FNDELAY), so we may
2787 * block if there are locks present... this
2788 * should be addressed in openat().
2790 /* XXX - would it be OK to generate a log record here? */
2791 err
= zfs_freesp(zp
, vap
->va_size
, 0, 0, FALSE
);
2796 if (mask
& (ATTR_ATIME
|ATTR_MTIME
) ||
2797 ((mask
& ATTR_XVATTR
) && (XVA_ISSET_REQ(xvap
, XAT_HIDDEN
) ||
2798 XVA_ISSET_REQ(xvap
, XAT_READONLY
) ||
2799 XVA_ISSET_REQ(xvap
, XAT_ARCHIVE
) ||
2800 XVA_ISSET_REQ(xvap
, XAT_OFFLINE
) ||
2801 XVA_ISSET_REQ(xvap
, XAT_SPARSE
) ||
2802 XVA_ISSET_REQ(xvap
, XAT_CREATETIME
) ||
2803 XVA_ISSET_REQ(xvap
, XAT_SYSTEM
)))) {
2804 need_policy
= zfs_zaccess(zp
, ACE_WRITE_ATTRIBUTES
, 0,
2808 if (mask
& (ATTR_UID
|ATTR_GID
)) {
2809 int idmask
= (mask
& (ATTR_UID
|ATTR_GID
));
2814 * NOTE: even if a new mode is being set,
2815 * we may clear S_ISUID/S_ISGID bits.
2818 if (!(mask
& ATTR_MODE
))
2819 vap
->va_mode
= zp
->z_mode
;
2822 * Take ownership or chgrp to group we are a member of
2825 take_owner
= (mask
& ATTR_UID
) && (vap
->va_uid
== crgetuid(cr
));
2826 take_group
= (mask
& ATTR_GID
) &&
2827 zfs_groupmember(zfsvfs
, vap
->va_gid
, cr
);
2830 * If both ATTR_UID and ATTR_GID are set then take_owner and
2831 * take_group must both be set in order to allow taking
2834 * Otherwise, send the check through secpolicy_vnode_setattr()
2838 if (((idmask
== (ATTR_UID
|ATTR_GID
)) &&
2839 take_owner
&& take_group
) ||
2840 ((idmask
== ATTR_UID
) && take_owner
) ||
2841 ((idmask
== ATTR_GID
) && take_group
)) {
2842 if (zfs_zaccess(zp
, ACE_WRITE_OWNER
, 0,
2843 skipaclchk
, cr
) == 0) {
2845 * Remove setuid/setgid for non-privileged users
2847 (void) secpolicy_setid_clear(vap
, cr
);
2848 trim_mask
= (mask
& (ATTR_UID
|ATTR_GID
));
2857 mutex_enter(&zp
->z_lock
);
2858 oldva
.va_mode
= zp
->z_mode
;
2859 zfs_fuid_map_ids(zp
, cr
, &oldva
.va_uid
, &oldva
.va_gid
);
2860 if (mask
& ATTR_XVATTR
) {
2862 * Update xvattr mask to include only those attributes
2863 * that are actually changing.
2865 * the bits will be restored prior to actually setting
2866 * the attributes so the caller thinks they were set.
2868 if (XVA_ISSET_REQ(xvap
, XAT_APPENDONLY
)) {
2869 if (xoap
->xoa_appendonly
!=
2870 ((zp
->z_pflags
& ZFS_APPENDONLY
) != 0)) {
2873 XVA_CLR_REQ(xvap
, XAT_APPENDONLY
);
2874 XVA_SET_REQ(tmpxvattr
, XAT_APPENDONLY
);
2878 if (XVA_ISSET_REQ(xvap
, XAT_NOUNLINK
)) {
2879 if (xoap
->xoa_nounlink
!=
2880 ((zp
->z_pflags
& ZFS_NOUNLINK
) != 0)) {
2883 XVA_CLR_REQ(xvap
, XAT_NOUNLINK
);
2884 XVA_SET_REQ(tmpxvattr
, XAT_NOUNLINK
);
2888 if (XVA_ISSET_REQ(xvap
, XAT_IMMUTABLE
)) {
2889 if (xoap
->xoa_immutable
!=
2890 ((zp
->z_pflags
& ZFS_IMMUTABLE
) != 0)) {
2893 XVA_CLR_REQ(xvap
, XAT_IMMUTABLE
);
2894 XVA_SET_REQ(tmpxvattr
, XAT_IMMUTABLE
);
2898 if (XVA_ISSET_REQ(xvap
, XAT_NODUMP
)) {
2899 if (xoap
->xoa_nodump
!=
2900 ((zp
->z_pflags
& ZFS_NODUMP
) != 0)) {
2903 XVA_CLR_REQ(xvap
, XAT_NODUMP
);
2904 XVA_SET_REQ(tmpxvattr
, XAT_NODUMP
);
2908 if (XVA_ISSET_REQ(xvap
, XAT_AV_MODIFIED
)) {
2909 if (xoap
->xoa_av_modified
!=
2910 ((zp
->z_pflags
& ZFS_AV_MODIFIED
) != 0)) {
2913 XVA_CLR_REQ(xvap
, XAT_AV_MODIFIED
);
2914 XVA_SET_REQ(tmpxvattr
, XAT_AV_MODIFIED
);
2918 if (XVA_ISSET_REQ(xvap
, XAT_AV_QUARANTINED
)) {
2919 if ((!S_ISREG(ip
->i_mode
) &&
2920 xoap
->xoa_av_quarantined
) ||
2921 xoap
->xoa_av_quarantined
!=
2922 ((zp
->z_pflags
& ZFS_AV_QUARANTINED
) != 0)) {
2925 XVA_CLR_REQ(xvap
, XAT_AV_QUARANTINED
);
2926 XVA_SET_REQ(tmpxvattr
, XAT_AV_QUARANTINED
);
2930 if (XVA_ISSET_REQ(xvap
, XAT_REPARSE
)) {
2931 mutex_exit(&zp
->z_lock
);
2936 if (need_policy
== FALSE
&&
2937 (XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
) ||
2938 XVA_ISSET_REQ(xvap
, XAT_OPAQUE
))) {
2943 mutex_exit(&zp
->z_lock
);
2945 if (mask
& ATTR_MODE
) {
2946 if (zfs_zaccess(zp
, ACE_WRITE_ACL
, 0, skipaclchk
, cr
) == 0) {
2947 err
= secpolicy_setid_setsticky_clear(ip
, vap
,
2952 trim_mask
|= ATTR_MODE
;
2960 * If trim_mask is set then take ownership
2961 * has been granted or write_acl is present and user
2962 * has the ability to modify mode. In that case remove
2963 * UID|GID and or MODE from mask so that
2964 * secpolicy_vnode_setattr() doesn't revoke it.
2968 saved_mask
= vap
->va_mask
;
2969 vap
->va_mask
&= ~trim_mask
;
2971 err
= secpolicy_vnode_setattr(cr
, ip
, vap
, &oldva
, flags
,
2972 (int (*)(void *, int, cred_t
*))zfs_zaccess_unix
, zp
);
2977 vap
->va_mask
|= saved_mask
;
2981 * secpolicy_vnode_setattr, or take ownership may have
2984 mask
= vap
->va_mask
;
2986 if ((mask
& (ATTR_UID
| ATTR_GID
))) {
2987 err
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_XATTR(zfsvfs
),
2988 &xattr_obj
, sizeof (xattr_obj
));
2990 if (err
== 0 && xattr_obj
) {
2991 err
= zfs_zget(ZTOZSB(zp
), xattr_obj
, &attrzp
);
2995 if (mask
& ATTR_UID
) {
2996 new_kuid
= zfs_fuid_create(zfsvfs
,
2997 (uint64_t)vap
->va_uid
, cr
, ZFS_OWNER
, &fuidp
);
2998 if (new_kuid
!= KUID_TO_SUID(ZTOI(zp
)->i_uid
) &&
2999 zfs_fuid_overquota(zfsvfs
, B_FALSE
, new_kuid
)) {
3007 if (mask
& ATTR_GID
) {
3008 new_kgid
= zfs_fuid_create(zfsvfs
,
3009 (uint64_t)vap
->va_gid
, cr
, ZFS_GROUP
, &fuidp
);
3010 if (new_kgid
!= KGID_TO_SGID(ZTOI(zp
)->i_gid
) &&
3011 zfs_fuid_overquota(zfsvfs
, B_TRUE
, new_kgid
)) {
3019 tx
= dmu_tx_create(zfsvfs
->z_os
);
3021 if (mask
& ATTR_MODE
) {
3022 uint64_t pmode
= zp
->z_mode
;
3024 new_mode
= (pmode
& S_IFMT
) | (vap
->va_mode
& ~S_IFMT
);
3026 zfs_acl_chmod_setattr(zp
, &aclp
, new_mode
);
3028 mutex_enter(&zp
->z_lock
);
3029 if (!zp
->z_is_sa
&& ((acl_obj
= zfs_external_acl(zp
)) != 0)) {
3031 * Are we upgrading ACL from old V0 format
3034 if (zfsvfs
->z_version
>= ZPL_VERSION_FUID
&&
3035 zfs_znode_acl_version(zp
) ==
3036 ZFS_ACL_VERSION_INITIAL
) {
3037 dmu_tx_hold_free(tx
, acl_obj
, 0,
3039 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
,
3040 0, aclp
->z_acl_bytes
);
3042 dmu_tx_hold_write(tx
, acl_obj
, 0,
3045 } else if (!zp
->z_is_sa
&& aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
3046 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
,
3047 0, aclp
->z_acl_bytes
);
3049 mutex_exit(&zp
->z_lock
);
3050 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_TRUE
);
3052 if ((mask
& ATTR_XVATTR
) &&
3053 XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
))
3054 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_TRUE
);
3056 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
3060 dmu_tx_hold_sa(tx
, attrzp
->z_sa_hdl
, B_FALSE
);
3063 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
3065 zfs_fuid_txhold(zfsvfs
, tx
);
3067 zfs_sa_upgrade_txholds(tx
, zp
);
3069 err
= dmu_tx_assign(tx
, TXG_WAIT
);
3075 * Set each attribute requested.
3076 * We group settings according to the locks they need to acquire.
3078 * Note: you cannot set ctime directly, although it will be
3079 * updated as a side-effect of calling this function.
3083 if (mask
& (ATTR_UID
|ATTR_GID
|ATTR_MODE
))
3084 mutex_enter(&zp
->z_acl_lock
);
3085 mutex_enter(&zp
->z_lock
);
3087 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_FLAGS(zfsvfs
), NULL
,
3088 &zp
->z_pflags
, sizeof (zp
->z_pflags
));
3091 if (mask
& (ATTR_UID
|ATTR_GID
|ATTR_MODE
))
3092 mutex_enter(&attrzp
->z_acl_lock
);
3093 mutex_enter(&attrzp
->z_lock
);
3094 SA_ADD_BULK_ATTR(xattr_bulk
, xattr_count
,
3095 SA_ZPL_FLAGS(zfsvfs
), NULL
, &attrzp
->z_pflags
,
3096 sizeof (attrzp
->z_pflags
));
3099 if (mask
& (ATTR_UID
|ATTR_GID
)) {
3101 if (mask
& ATTR_UID
) {
3102 ZTOI(zp
)->i_uid
= SUID_TO_KUID(new_kuid
);
3103 new_uid
= zfs_uid_read(ZTOI(zp
));
3104 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_UID(zfsvfs
), NULL
,
3105 &new_uid
, sizeof (new_uid
));
3107 SA_ADD_BULK_ATTR(xattr_bulk
, xattr_count
,
3108 SA_ZPL_UID(zfsvfs
), NULL
, &new_uid
,
3110 ZTOI(attrzp
)->i_uid
= SUID_TO_KUID(new_uid
);
3114 if (mask
& ATTR_GID
) {
3115 ZTOI(zp
)->i_gid
= SGID_TO_KGID(new_kgid
);
3116 new_gid
= zfs_gid_read(ZTOI(zp
));
3117 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_GID(zfsvfs
),
3118 NULL
, &new_gid
, sizeof (new_gid
));
3120 SA_ADD_BULK_ATTR(xattr_bulk
, xattr_count
,
3121 SA_ZPL_GID(zfsvfs
), NULL
, &new_gid
,
3123 ZTOI(attrzp
)->i_gid
= SGID_TO_KGID(new_kgid
);
3126 if (!(mask
& ATTR_MODE
)) {
3127 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MODE(zfsvfs
),
3128 NULL
, &new_mode
, sizeof (new_mode
));
3129 new_mode
= zp
->z_mode
;
3131 err
= zfs_acl_chown_setattr(zp
);
3134 err
= zfs_acl_chown_setattr(attrzp
);
3139 if (mask
& ATTR_MODE
) {
3140 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MODE(zfsvfs
), NULL
,
3141 &new_mode
, sizeof (new_mode
));
3142 zp
->z_mode
= ZTOI(zp
)->i_mode
= new_mode
;
3143 ASSERT3P(aclp
, !=, NULL
);
3144 err
= zfs_aclset_common(zp
, aclp
, cr
, tx
);
3146 if (zp
->z_acl_cached
)
3147 zfs_acl_free(zp
->z_acl_cached
);
3148 zp
->z_acl_cached
= aclp
;
3152 if ((mask
& ATTR_ATIME
) || zp
->z_atime_dirty
) {
3153 zp
->z_atime_dirty
= 0;
3154 ZFS_TIME_ENCODE(&ip
->i_atime
, atime
);
3155 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_ATIME(zfsvfs
), NULL
,
3156 &atime
, sizeof (atime
));
3159 if (mask
& (ATTR_MTIME
| ATTR_SIZE
)) {
3160 ZFS_TIME_ENCODE(&vap
->va_mtime
, mtime
);
3161 ZTOI(zp
)->i_mtime
= timespec_trunc(vap
->va_mtime
,
3162 ZTOI(zp
)->i_sb
->s_time_gran
);
3164 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_MTIME(zfsvfs
), NULL
,
3165 mtime
, sizeof (mtime
));
3168 if (mask
& (ATTR_CTIME
| ATTR_SIZE
)) {
3169 ZFS_TIME_ENCODE(&vap
->va_ctime
, ctime
);
3170 ZTOI(zp
)->i_ctime
= timespec_trunc(vap
->va_ctime
,
3171 ZTOI(zp
)->i_sb
->s_time_gran
);
3172 SA_ADD_BULK_ATTR(bulk
, count
, SA_ZPL_CTIME(zfsvfs
), NULL
,
3173 ctime
, sizeof (ctime
));
3176 if (attrzp
&& mask
) {
3177 SA_ADD_BULK_ATTR(xattr_bulk
, xattr_count
,
3178 SA_ZPL_CTIME(zfsvfs
), NULL
, &ctime
,
3183 * Do this after setting timestamps to prevent timestamp
3184 * update from toggling bit
3187 if (xoap
&& (mask
& ATTR_XVATTR
)) {
3190 * restore trimmed off masks
3191 * so that return masks can be set for caller.
3194 if (XVA_ISSET_REQ(tmpxvattr
, XAT_APPENDONLY
)) {
3195 XVA_SET_REQ(xvap
, XAT_APPENDONLY
);
3197 if (XVA_ISSET_REQ(tmpxvattr
, XAT_NOUNLINK
)) {
3198 XVA_SET_REQ(xvap
, XAT_NOUNLINK
);
3200 if (XVA_ISSET_REQ(tmpxvattr
, XAT_IMMUTABLE
)) {
3201 XVA_SET_REQ(xvap
, XAT_IMMUTABLE
);
3203 if (XVA_ISSET_REQ(tmpxvattr
, XAT_NODUMP
)) {
3204 XVA_SET_REQ(xvap
, XAT_NODUMP
);
3206 if (XVA_ISSET_REQ(tmpxvattr
, XAT_AV_MODIFIED
)) {
3207 XVA_SET_REQ(xvap
, XAT_AV_MODIFIED
);
3209 if (XVA_ISSET_REQ(tmpxvattr
, XAT_AV_QUARANTINED
)) {
3210 XVA_SET_REQ(xvap
, XAT_AV_QUARANTINED
);
3213 if (XVA_ISSET_REQ(xvap
, XAT_AV_SCANSTAMP
))
3214 ASSERT(S_ISREG(ip
->i_mode
));
3216 zfs_xvattr_set(zp
, xvap
, tx
);
3220 zfs_fuid_sync(zfsvfs
, tx
);
3223 zfs_log_setattr(zilog
, tx
, TX_SETATTR
, zp
, vap
, mask
, fuidp
);
3225 mutex_exit(&zp
->z_lock
);
3226 if (mask
& (ATTR_UID
|ATTR_GID
|ATTR_MODE
))
3227 mutex_exit(&zp
->z_acl_lock
);
3230 if (mask
& (ATTR_UID
|ATTR_GID
|ATTR_MODE
))
3231 mutex_exit(&attrzp
->z_acl_lock
);
3232 mutex_exit(&attrzp
->z_lock
);
3235 if (err
== 0 && attrzp
) {
3236 err2
= sa_bulk_update(attrzp
->z_sa_hdl
, xattr_bulk
,
3245 zfs_fuid_info_free(fuidp
);
3253 if (err
== ERESTART
)
3256 err2
= sa_bulk_update(zp
->z_sa_hdl
, bulk
, count
, tx
);
3260 zfs_inode_update(zp
);
3264 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
3265 zil_commit(zilog
, 0);
3268 kmem_free(xattr_bulk
, sizeof (sa_bulk_attr_t
) * 7);
3269 kmem_free(bulk
, sizeof (sa_bulk_attr_t
) * 7);
3270 kmem_free(tmpxvattr
, sizeof (xvattr_t
));
3275 typedef struct zfs_zlock
{
3276 krwlock_t
*zl_rwlock
; /* lock we acquired */
3277 znode_t
*zl_znode
; /* znode we held */
3278 struct zfs_zlock
*zl_next
; /* next in list */
3282 * Drop locks and release vnodes that were held by zfs_rename_lock().
3285 zfs_rename_unlock(zfs_zlock_t
**zlpp
)
3289 while ((zl
= *zlpp
) != NULL
) {
3290 if (zl
->zl_znode
!= NULL
)
3291 zfs_iput_async(ZTOI(zl
->zl_znode
));
3292 rw_exit(zl
->zl_rwlock
);
3293 *zlpp
= zl
->zl_next
;
3294 kmem_free(zl
, sizeof (*zl
));
3299 * Search back through the directory tree, using the ".." entries.
3300 * Lock each directory in the chain to prevent concurrent renames.
3301 * Fail any attempt to move a directory into one of its own descendants.
3302 * XXX - z_parent_lock can overlap with map or grow locks
3305 zfs_rename_lock(znode_t
*szp
, znode_t
*tdzp
, znode_t
*sdzp
, zfs_zlock_t
**zlpp
)
3309 uint64_t rootid
= ZTOZSB(zp
)->z_root
;
3310 uint64_t oidp
= zp
->z_id
;
3311 krwlock_t
*rwlp
= &szp
->z_parent_lock
;
3312 krw_t rw
= RW_WRITER
;
3315 * First pass write-locks szp and compares to zp->z_id.
3316 * Later passes read-lock zp and compare to zp->z_parent.
3319 if (!rw_tryenter(rwlp
, rw
)) {
3321 * Another thread is renaming in this path.
3322 * Note that if we are a WRITER, we don't have any
3323 * parent_locks held yet.
3325 if (rw
== RW_READER
&& zp
->z_id
> szp
->z_id
) {
3327 * Drop our locks and restart
3329 zfs_rename_unlock(&zl
);
3333 rwlp
= &szp
->z_parent_lock
;
3338 * Wait for other thread to drop its locks
3344 zl
= kmem_alloc(sizeof (*zl
), KM_SLEEP
);
3345 zl
->zl_rwlock
= rwlp
;
3346 zl
->zl_znode
= NULL
;
3347 zl
->zl_next
= *zlpp
;
3350 if (oidp
== szp
->z_id
) /* We're a descendant of szp */
3351 return (SET_ERROR(EINVAL
));
3353 if (oidp
== rootid
) /* We've hit the top */
3356 if (rw
== RW_READER
) { /* i.e. not the first pass */
3357 int error
= zfs_zget(ZTOZSB(zp
), oidp
, &zp
);
3362 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_PARENT(ZTOZSB(zp
)),
3363 &oidp
, sizeof (oidp
));
3364 rwlp
= &zp
->z_parent_lock
;
3367 } while (zp
->z_id
!= sdzp
->z_id
);
3373 * Move an entry from the provided source directory to the target
3374 * directory. Change the entry name as indicated.
3376 * IN: sdip - Source directory containing the "old entry".
3377 * snm - Old entry name.
3378 * tdip - Target directory to contain the "new entry".
3379 * tnm - New entry name.
3380 * cr - credentials of caller.
3381 * flags - case flags
3383 * RETURN: 0 on success, error code on failure.
3386 * sdip,tdip - ctime|mtime updated
3390 zfs_rename(struct inode
*sdip
, char *snm
, struct inode
*tdip
, char *tnm
,
3391 cred_t
*cr
, int flags
)
3393 znode_t
*tdzp
, *szp
, *tzp
;
3394 znode_t
*sdzp
= ITOZ(sdip
);
3395 zfsvfs_t
*zfsvfs
= ITOZSB(sdip
);
3397 zfs_dirlock_t
*sdl
, *tdl
;
3400 int cmp
, serr
, terr
;
3403 boolean_t waited
= B_FALSE
;
3405 if (snm
== NULL
|| tnm
== NULL
)
3406 return (SET_ERROR(EINVAL
));
3409 ZFS_VERIFY_ZP(sdzp
);
3410 zilog
= zfsvfs
->z_log
;
3413 ZFS_VERIFY_ZP(tdzp
);
3416 * We check i_sb because snapshots and the ctldir must have different
3419 if (tdip
->i_sb
!= sdip
->i_sb
|| zfsctl_is_node(tdip
)) {
3421 return (SET_ERROR(EXDEV
));
3424 if (zfsvfs
->z_utf8
&& u8_validate(tnm
,
3425 strlen(tnm
), NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
3427 return (SET_ERROR(EILSEQ
));
3430 if (flags
& FIGNORECASE
)
3439 * This is to prevent the creation of links into attribute space
3440 * by renaming a linked file into/outof an attribute directory.
3441 * See the comment in zfs_link() for why this is considered bad.
3443 if ((tdzp
->z_pflags
& ZFS_XATTR
) != (sdzp
->z_pflags
& ZFS_XATTR
)) {
3445 return (SET_ERROR(EINVAL
));
3449 * Lock source and target directory entries. To prevent deadlock,
3450 * a lock ordering must be defined. We lock the directory with
3451 * the smallest object id first, or if it's a tie, the one with
3452 * the lexically first name.
3454 if (sdzp
->z_id
< tdzp
->z_id
) {
3456 } else if (sdzp
->z_id
> tdzp
->z_id
) {
3460 * First compare the two name arguments without
3461 * considering any case folding.
3463 int nofold
= (zfsvfs
->z_norm
& ~U8_TEXTPREP_TOUPPER
);
3465 cmp
= u8_strcmp(snm
, tnm
, 0, nofold
, U8_UNICODE_LATEST
, &error
);
3466 ASSERT(error
== 0 || !zfsvfs
->z_utf8
);
3469 * POSIX: "If the old argument and the new argument
3470 * both refer to links to the same existing file,
3471 * the rename() function shall return successfully
3472 * and perform no other action."
3478 * If the file system is case-folding, then we may
3479 * have some more checking to do. A case-folding file
3480 * system is either supporting mixed case sensitivity
3481 * access or is completely case-insensitive. Note
3482 * that the file system is always case preserving.
3484 * In mixed sensitivity mode case sensitive behavior
3485 * is the default. FIGNORECASE must be used to
3486 * explicitly request case insensitive behavior.
3488 * If the source and target names provided differ only
3489 * by case (e.g., a request to rename 'tim' to 'Tim'),
3490 * we will treat this as a special case in the
3491 * case-insensitive mode: as long as the source name
3492 * is an exact match, we will allow this to proceed as
3493 * a name-change request.
3495 if ((zfsvfs
->z_case
== ZFS_CASE_INSENSITIVE
||
3496 (zfsvfs
->z_case
== ZFS_CASE_MIXED
&&
3497 flags
& FIGNORECASE
)) &&
3498 u8_strcmp(snm
, tnm
, 0, zfsvfs
->z_norm
, U8_UNICODE_LATEST
,
3501 * case preserving rename request, require exact
3510 * If the source and destination directories are the same, we should
3511 * grab the z_name_lock of that directory only once.
3515 rw_enter(&sdzp
->z_name_lock
, RW_READER
);
3519 serr
= zfs_dirent_lock(&sdl
, sdzp
, snm
, &szp
,
3520 ZEXISTS
| zflg
, NULL
, NULL
);
3521 terr
= zfs_dirent_lock(&tdl
,
3522 tdzp
, tnm
, &tzp
, ZRENAMING
| zflg
, NULL
, NULL
);
3524 terr
= zfs_dirent_lock(&tdl
,
3525 tdzp
, tnm
, &tzp
, zflg
, NULL
, NULL
);
3526 serr
= zfs_dirent_lock(&sdl
,
3527 sdzp
, snm
, &szp
, ZEXISTS
| ZRENAMING
| zflg
,
3533 * Source entry invalid or not there.
3536 zfs_dirent_unlock(tdl
);
3542 rw_exit(&sdzp
->z_name_lock
);
3544 if (strcmp(snm
, "..") == 0)
3550 zfs_dirent_unlock(sdl
);
3554 rw_exit(&sdzp
->z_name_lock
);
3556 if (strcmp(tnm
, "..") == 0)
3563 * Must have write access at the source to remove the old entry
3564 * and write access at the target to create the new entry.
3565 * Note that if target and source are the same, this can be
3566 * done in a single check.
3569 if ((error
= zfs_zaccess_rename(sdzp
, szp
, tdzp
, tzp
, cr
)))
3572 if (S_ISDIR(ZTOI(szp
)->i_mode
)) {
3574 * Check to make sure rename is valid.
3575 * Can't do a move like this: /usr/a/b to /usr/a/b/c/d
3577 if ((error
= zfs_rename_lock(szp
, tdzp
, sdzp
, &zl
)))
3582 * Does target exist?
3586 * Source and target must be the same type.
3588 if (S_ISDIR(ZTOI(szp
)->i_mode
)) {
3589 if (!S_ISDIR(ZTOI(tzp
)->i_mode
)) {
3590 error
= SET_ERROR(ENOTDIR
);
3594 if (S_ISDIR(ZTOI(tzp
)->i_mode
)) {
3595 error
= SET_ERROR(EISDIR
);
3600 * POSIX dictates that when the source and target
3601 * entries refer to the same file object, rename
3602 * must do nothing and exit without error.
3604 if (szp
->z_id
== tzp
->z_id
) {
3610 tx
= dmu_tx_create(zfsvfs
->z_os
);
3611 dmu_tx_hold_sa(tx
, szp
->z_sa_hdl
, B_FALSE
);
3612 dmu_tx_hold_sa(tx
, sdzp
->z_sa_hdl
, B_FALSE
);
3613 dmu_tx_hold_zap(tx
, sdzp
->z_id
, FALSE
, snm
);
3614 dmu_tx_hold_zap(tx
, tdzp
->z_id
, TRUE
, tnm
);
3616 dmu_tx_hold_sa(tx
, tdzp
->z_sa_hdl
, B_FALSE
);
3617 zfs_sa_upgrade_txholds(tx
, tdzp
);
3620 dmu_tx_hold_sa(tx
, tzp
->z_sa_hdl
, B_FALSE
);
3621 zfs_sa_upgrade_txholds(tx
, tzp
);
3624 zfs_sa_upgrade_txholds(tx
, szp
);
3625 dmu_tx_hold_zap(tx
, zfsvfs
->z_unlinkedobj
, FALSE
, NULL
);
3626 error
= dmu_tx_assign(tx
, waited
? TXG_WAITED
: TXG_NOWAIT
);
3629 zfs_rename_unlock(&zl
);
3630 zfs_dirent_unlock(sdl
);
3631 zfs_dirent_unlock(tdl
);
3634 rw_exit(&sdzp
->z_name_lock
);
3636 if (error
== ERESTART
) {
3653 if (tzp
) /* Attempt to remove the existing target */
3654 error
= zfs_link_destroy(tdl
, tzp
, tx
, zflg
, NULL
);
3657 error
= zfs_link_create(tdl
, szp
, tx
, ZRENAMING
);
3659 szp
->z_pflags
|= ZFS_AV_MODIFIED
;
3661 error
= sa_update(szp
->z_sa_hdl
, SA_ZPL_FLAGS(zfsvfs
),
3662 (void *)&szp
->z_pflags
, sizeof (uint64_t), tx
);
3665 error
= zfs_link_destroy(sdl
, szp
, tx
, ZRENAMING
, NULL
);
3667 zfs_log_rename(zilog
, tx
, TX_RENAME
|
3668 (flags
& FIGNORECASE
? TX_CI
: 0), sdzp
,
3669 sdl
->dl_name
, tdzp
, tdl
->dl_name
, szp
);
3672 * At this point, we have successfully created
3673 * the target name, but have failed to remove
3674 * the source name. Since the create was done
3675 * with the ZRENAMING flag, there are
3676 * complications; for one, the link count is
3677 * wrong. The easiest way to deal with this
3678 * is to remove the newly created target, and
3679 * return the original error. This must
3680 * succeed; fortunately, it is very unlikely to
3681 * fail, since we just created it.
3683 VERIFY3U(zfs_link_destroy(tdl
, szp
, tx
,
3684 ZRENAMING
, NULL
), ==, 0);
3692 zfs_rename_unlock(&zl
);
3694 zfs_dirent_unlock(sdl
);
3695 zfs_dirent_unlock(tdl
);
3697 zfs_inode_update(sdzp
);
3699 rw_exit(&sdzp
->z_name_lock
);
3702 zfs_inode_update(tdzp
);
3704 zfs_inode_update(szp
);
3707 zfs_inode_update(tzp
);
3711 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
3712 zil_commit(zilog
, 0);
3719 * Insert the indicated symbolic reference entry into the directory.
3721 * IN: dip - Directory to contain new symbolic link.
3722 * link - Name for new symlink entry.
3723 * vap - Attributes of new entry.
3724 * target - Target path of new symlink.
3726 * cr - credentials of caller.
3727 * flags - case flags
3729 * RETURN: 0 on success, error code on failure.
3732 * dip - ctime|mtime updated
3736 zfs_symlink(struct inode
*dip
, char *name
, vattr_t
*vap
, char *link
,
3737 struct inode
**ipp
, cred_t
*cr
, int flags
)
3739 znode_t
*zp
, *dzp
= ITOZ(dip
);
3742 zfsvfs_t
*zfsvfs
= ITOZSB(dip
);
3744 uint64_t len
= strlen(link
);
3747 zfs_acl_ids_t acl_ids
;
3748 boolean_t fuid_dirtied
;
3749 uint64_t txtype
= TX_SYMLINK
;
3750 boolean_t waited
= B_FALSE
;
3752 ASSERT(S_ISLNK(vap
->va_mode
));
3755 return (SET_ERROR(EINVAL
));
3759 zilog
= zfsvfs
->z_log
;
3761 if (zfsvfs
->z_utf8
&& u8_validate(name
, strlen(name
),
3762 NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
3764 return (SET_ERROR(EILSEQ
));
3766 if (flags
& FIGNORECASE
)
3769 if (len
> MAXPATHLEN
) {
3771 return (SET_ERROR(ENAMETOOLONG
));
3774 if ((error
= zfs_acl_ids_create(dzp
, 0,
3775 vap
, cr
, NULL
, &acl_ids
)) != 0) {
3783 * Attempt to lock directory; fail if entry already exists.
3785 error
= zfs_dirent_lock(&dl
, dzp
, name
, &zp
, zflg
, NULL
, NULL
);
3787 zfs_acl_ids_free(&acl_ids
);
3792 if ((error
= zfs_zaccess(dzp
, ACE_ADD_FILE
, 0, B_FALSE
, cr
))) {
3793 zfs_acl_ids_free(&acl_ids
);
3794 zfs_dirent_unlock(dl
);
3799 if (zfs_acl_ids_overquota(zfsvfs
, &acl_ids
)) {
3800 zfs_acl_ids_free(&acl_ids
);
3801 zfs_dirent_unlock(dl
);
3803 return (SET_ERROR(EDQUOT
));
3805 tx
= dmu_tx_create(zfsvfs
->z_os
);
3806 fuid_dirtied
= zfsvfs
->z_fuid_dirty
;
3807 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
, 0, MAX(1, len
));
3808 dmu_tx_hold_zap(tx
, dzp
->z_id
, TRUE
, name
);
3809 dmu_tx_hold_sa_create(tx
, acl_ids
.z_aclp
->z_acl_bytes
+
3810 ZFS_SA_BASE_ATTR_SIZE
+ len
);
3811 dmu_tx_hold_sa(tx
, dzp
->z_sa_hdl
, B_FALSE
);
3812 if (!zfsvfs
->z_use_sa
&& acl_ids
.z_aclp
->z_acl_bytes
> ZFS_ACE_SPACE
) {
3813 dmu_tx_hold_write(tx
, DMU_NEW_OBJECT
, 0,
3814 acl_ids
.z_aclp
->z_acl_bytes
);
3817 zfs_fuid_txhold(zfsvfs
, tx
);
3818 error
= dmu_tx_assign(tx
, waited
? TXG_WAITED
: TXG_NOWAIT
);
3820 zfs_dirent_unlock(dl
);
3821 if (error
== ERESTART
) {
3827 zfs_acl_ids_free(&acl_ids
);
3834 * Create a new object for the symlink.
3835 * for version 4 ZPL datsets the symlink will be an SA attribute
3837 zfs_mknode(dzp
, vap
, tx
, cr
, 0, &zp
, &acl_ids
);
3840 zfs_fuid_sync(zfsvfs
, tx
);
3842 mutex_enter(&zp
->z_lock
);
3844 error
= sa_update(zp
->z_sa_hdl
, SA_ZPL_SYMLINK(zfsvfs
),
3847 zfs_sa_symlink(zp
, link
, len
, tx
);
3848 mutex_exit(&zp
->z_lock
);
3851 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_SIZE(zfsvfs
),
3852 &zp
->z_size
, sizeof (zp
->z_size
), tx
);
3854 * Insert the new object into the directory.
3856 (void) zfs_link_create(dl
, zp
, tx
, ZNEW
);
3858 if (flags
& FIGNORECASE
)
3860 zfs_log_symlink(zilog
, tx
, txtype
, dzp
, zp
, name
, link
);
3862 zfs_inode_update(dzp
);
3863 zfs_inode_update(zp
);
3865 zfs_acl_ids_free(&acl_ids
);
3869 zfs_dirent_unlock(dl
);
3873 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
3874 zil_commit(zilog
, 0);
3881 * Return, in the buffer contained in the provided uio structure,
3882 * the symbolic path referred to by ip.
3884 * IN: ip - inode of symbolic link
3885 * uio - structure to contain the link path.
3886 * cr - credentials of caller.
3888 * RETURN: 0 if success
3889 * error code if failure
3892 * ip - atime updated
3896 zfs_readlink(struct inode
*ip
, uio_t
*uio
, cred_t
*cr
)
3898 znode_t
*zp
= ITOZ(ip
);
3899 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
3905 mutex_enter(&zp
->z_lock
);
3907 error
= sa_lookup_uio(zp
->z_sa_hdl
,
3908 SA_ZPL_SYMLINK(zfsvfs
), uio
);
3910 error
= zfs_sa_readlink(zp
, uio
);
3911 mutex_exit(&zp
->z_lock
);
3918 * Insert a new entry into directory tdip referencing sip.
3920 * IN: tdip - Directory to contain new entry.
3921 * sip - inode of new entry.
3922 * name - name of new entry.
3923 * cr - credentials of caller.
3925 * RETURN: 0 if success
3926 * error code if failure
3929 * tdip - ctime|mtime updated
3930 * sip - ctime updated
3934 zfs_link(struct inode
*tdip
, struct inode
*sip
, char *name
, cred_t
*cr
,
3937 znode_t
*dzp
= ITOZ(tdip
);
3939 zfsvfs_t
*zfsvfs
= ITOZSB(tdip
);
3947 boolean_t waited
= B_FALSE
;
3948 boolean_t is_tmpfile
= 0;
3951 is_tmpfile
= (sip
->i_nlink
== 0 && (sip
->i_state
& I_LINKABLE
));
3953 ASSERT(S_ISDIR(tdip
->i_mode
));
3956 return (SET_ERROR(EINVAL
));
3960 zilog
= zfsvfs
->z_log
;
3963 * POSIX dictates that we return EPERM here.
3964 * Better choices include ENOTSUP or EISDIR.
3966 if (S_ISDIR(sip
->i_mode
)) {
3968 return (SET_ERROR(EPERM
));
3975 * We check i_sb because snapshots and the ctldir must have different
3978 if (sip
->i_sb
!= tdip
->i_sb
|| zfsctl_is_node(sip
)) {
3980 return (SET_ERROR(EXDEV
));
3983 /* Prevent links to .zfs/shares files */
3985 if ((error
= sa_lookup(szp
->z_sa_hdl
, SA_ZPL_PARENT(zfsvfs
),
3986 &parent
, sizeof (uint64_t))) != 0) {
3990 if (parent
== zfsvfs
->z_shares_dir
) {
3992 return (SET_ERROR(EPERM
));
3995 if (zfsvfs
->z_utf8
&& u8_validate(name
,
3996 strlen(name
), NULL
, U8_VALIDATE_ENTIRE
, &error
) < 0) {
3998 return (SET_ERROR(EILSEQ
));
4000 if (flags
& FIGNORECASE
)
4004 * We do not support links between attributes and non-attributes
4005 * because of the potential security risk of creating links
4006 * into "normal" file space in order to circumvent restrictions
4007 * imposed in attribute space.
4009 if ((szp
->z_pflags
& ZFS_XATTR
) != (dzp
->z_pflags
& ZFS_XATTR
)) {
4011 return (SET_ERROR(EINVAL
));
4014 owner
= zfs_fuid_map_id(zfsvfs
, KUID_TO_SUID(sip
->i_uid
),
4016 if (owner
!= crgetuid(cr
) && secpolicy_basic_link(cr
) != 0) {
4018 return (SET_ERROR(EPERM
));
4021 if ((error
= zfs_zaccess(dzp
, ACE_ADD_FILE
, 0, B_FALSE
, cr
))) {
4028 * Attempt to lock directory; fail if entry already exists.
4030 error
= zfs_dirent_lock(&dl
, dzp
, name
, &tzp
, zf
, NULL
, NULL
);
4036 tx
= dmu_tx_create(zfsvfs
->z_os
);
4037 dmu_tx_hold_sa(tx
, szp
->z_sa_hdl
, B_FALSE
);
4038 dmu_tx_hold_zap(tx
, dzp
->z_id
, TRUE
, name
);
4040 dmu_tx_hold_zap(tx
, zfsvfs
->z_unlinkedobj
, FALSE
, NULL
);
4042 zfs_sa_upgrade_txholds(tx
, szp
);
4043 zfs_sa_upgrade_txholds(tx
, dzp
);
4044 error
= dmu_tx_assign(tx
, waited
? TXG_WAITED
: TXG_NOWAIT
);
4046 zfs_dirent_unlock(dl
);
4047 if (error
== ERESTART
) {
4057 /* unmark z_unlinked so zfs_link_create will not reject */
4059 szp
->z_unlinked
= 0;
4060 error
= zfs_link_create(dl
, szp
, tx
, 0);
4063 uint64_t txtype
= TX_LINK
;
4065 * tmpfile is created to be in z_unlinkedobj, so remove it.
4066 * Also, we don't log in ZIL, be cause all previous file
4067 * operation on the tmpfile are ignored by ZIL. Instead we
4068 * always wait for txg to sync to make sure all previous
4069 * operation are sync safe.
4072 VERIFY(zap_remove_int(zfsvfs
->z_os
,
4073 zfsvfs
->z_unlinkedobj
, szp
->z_id
, tx
) == 0);
4075 if (flags
& FIGNORECASE
)
4077 zfs_log_link(zilog
, tx
, txtype
, dzp
, szp
, name
);
4079 } else if (is_tmpfile
) {
4080 /* restore z_unlinked since when linking failed */
4081 szp
->z_unlinked
= 1;
4083 txg
= dmu_tx_get_txg(tx
);
4086 zfs_dirent_unlock(dl
);
4088 if (!is_tmpfile
&& zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
4089 zil_commit(zilog
, 0);
4092 txg_wait_synced(dmu_objset_pool(zfsvfs
->z_os
), txg
);
4094 zfs_inode_update(dzp
);
4095 zfs_inode_update(szp
);
4101 zfs_putpage_commit_cb(void *arg
)
4103 struct page
*pp
= arg
;
4106 end_page_writeback(pp
);
4110 * Push a page out to disk, once the page is on stable storage the
4111 * registered commit callback will be run as notification of completion.
4113 * IN: ip - page mapped for inode.
4114 * pp - page to push (page is locked)
4115 * wbc - writeback control data
4117 * RETURN: 0 if success
4118 * error code if failure
4121 * ip - ctime|mtime updated
4125 zfs_putpage(struct inode
*ip
, struct page
*pp
, struct writeback_control
*wbc
)
4127 znode_t
*zp
= ITOZ(ip
);
4128 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4136 uint64_t mtime
[2], ctime
[2];
4137 sa_bulk_attr_t bulk
[3];
4139 struct address_space
*mapping
;
4144 ASSERT(PageLocked(pp
));
4146 pgoff
= page_offset(pp
); /* Page byte-offset in file */
4147 offset
= i_size_read(ip
); /* File length in bytes */
4148 pglen
= MIN(PAGE_SIZE
, /* Page length in bytes */
4149 P2ROUNDUP(offset
, PAGE_SIZE
)-pgoff
);
4151 /* Page is beyond end of file */
4152 if (pgoff
>= offset
) {
4158 /* Truncate page length to end of file */
4159 if (pgoff
+ pglen
> offset
)
4160 pglen
= offset
- pgoff
;
4164 * FIXME: Allow mmap writes past its quota. The correct fix
4165 * is to register a page_mkwrite() handler to count the page
4166 * against its quota when it is about to be dirtied.
4168 if (zfs_owner_overquota(zfsvfs
, zp
, B_FALSE
) ||
4169 zfs_owner_overquota(zfsvfs
, zp
, B_TRUE
)) {
4175 * The ordering here is critical and must adhere to the following
4176 * rules in order to avoid deadlocking in either zfs_read() or
4177 * zfs_free_range() due to a lock inversion.
4179 * 1) The page must be unlocked prior to acquiring the range lock.
4180 * This is critical because zfs_read() calls find_lock_page()
4181 * which may block on the page lock while holding the range lock.
4183 * 2) Before setting or clearing write back on a page the range lock
4184 * must be held in order to prevent a lock inversion with the
4185 * zfs_free_range() function.
4187 * This presents a problem because upon entering this function the
4188 * page lock is already held. To safely acquire the range lock the
4189 * page lock must be dropped. This creates a window where another
4190 * process could truncate, invalidate, dirty, or write out the page.
4192 * Therefore, after successfully reacquiring the range and page locks
4193 * the current page state is checked. In the common case everything
4194 * will be as is expected and it can be written out. However, if
4195 * the page state has changed it must be handled accordingly.
4197 mapping
= pp
->mapping
;
4198 redirty_page_for_writepage(wbc
, pp
);
4201 rl
= zfs_range_lock(&zp
->z_range_lock
, pgoff
, pglen
, RL_WRITER
);
4204 /* Page mapping changed or it was no longer dirty, we're done */
4205 if (unlikely((mapping
!= pp
->mapping
) || !PageDirty(pp
))) {
4207 zfs_range_unlock(rl
);
4212 /* Another process started write block if required */
4213 if (PageWriteback(pp
)) {
4215 zfs_range_unlock(rl
);
4217 if (wbc
->sync_mode
!= WB_SYNC_NONE
)
4218 wait_on_page_writeback(pp
);
4224 /* Clear the dirty flag the required locks are held */
4225 if (!clear_page_dirty_for_io(pp
)) {
4227 zfs_range_unlock(rl
);
4233 * Counterpart for redirty_page_for_writepage() above. This page
4234 * was in fact not skipped and should not be counted as if it were.
4236 wbc
->pages_skipped
--;
4237 set_page_writeback(pp
);
4240 tx
= dmu_tx_create(zfsvfs
->z_os
);
4241 dmu_tx_hold_write(tx
, zp
->z_id
, pgoff
, pglen
);
4242 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
4243 zfs_sa_upgrade_txholds(tx
, zp
);
4245 err
= dmu_tx_assign(tx
, TXG_NOWAIT
);
4247 if (err
== ERESTART
)
4251 __set_page_dirty_nobuffers(pp
);
4253 end_page_writeback(pp
);
4254 zfs_range_unlock(rl
);
4260 ASSERT3U(pglen
, <=, PAGE_SIZE
);
4261 dmu_write(zfsvfs
->z_os
, zp
->z_id
, pgoff
, pglen
, va
, tx
);
4264 SA_ADD_BULK_ATTR(bulk
, cnt
, SA_ZPL_MTIME(zfsvfs
), NULL
, &mtime
, 16);
4265 SA_ADD_BULK_ATTR(bulk
, cnt
, SA_ZPL_CTIME(zfsvfs
), NULL
, &ctime
, 16);
4266 SA_ADD_BULK_ATTR(bulk
, cnt
, SA_ZPL_FLAGS(zfsvfs
), NULL
,
4269 /* Preserve the mtime and ctime provided by the inode */
4270 ZFS_TIME_ENCODE(&ip
->i_mtime
, mtime
);
4271 ZFS_TIME_ENCODE(&ip
->i_ctime
, ctime
);
4272 zp
->z_atime_dirty
= 0;
4275 err
= sa_bulk_update(zp
->z_sa_hdl
, bulk
, cnt
, tx
);
4277 zfs_log_write(zfsvfs
->z_log
, tx
, TX_WRITE
, zp
, pgoff
, pglen
, 0,
4278 zfs_putpage_commit_cb
, pp
);
4281 zfs_range_unlock(rl
);
4283 if (wbc
->sync_mode
!= WB_SYNC_NONE
) {
4285 * Note that this is rarely called under writepages(), because
4286 * writepages() normally handles the entire commit for
4287 * performance reasons.
4289 zil_commit(zfsvfs
->z_log
, zp
->z_id
);
4297 * Update the system attributes when the inode has been dirtied. For the
4298 * moment we only update the mode, atime, mtime, and ctime.
4301 zfs_dirty_inode(struct inode
*ip
, int flags
)
4303 znode_t
*zp
= ITOZ(ip
);
4304 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4306 uint64_t mode
, atime
[2], mtime
[2], ctime
[2];
4307 sa_bulk_attr_t bulk
[4];
4311 if (zfs_is_readonly(zfsvfs
) || dmu_objset_is_snapshot(zfsvfs
->z_os
))
4319 * This is the lazytime semantic indroduced in Linux 4.0
4320 * This flag will only be called from update_time when lazytime is set.
4321 * (Note, I_DIRTY_SYNC will also set if not lazytime)
4322 * Fortunately mtime and ctime are managed within ZFS itself, so we
4323 * only need to dirty atime.
4325 if (flags
== I_DIRTY_TIME
) {
4326 zp
->z_atime_dirty
= 1;
4331 tx
= dmu_tx_create(zfsvfs
->z_os
);
4333 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
4334 zfs_sa_upgrade_txholds(tx
, zp
);
4336 error
= dmu_tx_assign(tx
, TXG_WAIT
);
4342 mutex_enter(&zp
->z_lock
);
4343 zp
->z_atime_dirty
= 0;
4345 SA_ADD_BULK_ATTR(bulk
, cnt
, SA_ZPL_MODE(zfsvfs
), NULL
, &mode
, 8);
4346 SA_ADD_BULK_ATTR(bulk
, cnt
, SA_ZPL_ATIME(zfsvfs
), NULL
, &atime
, 16);
4347 SA_ADD_BULK_ATTR(bulk
, cnt
, SA_ZPL_MTIME(zfsvfs
), NULL
, &mtime
, 16);
4348 SA_ADD_BULK_ATTR(bulk
, cnt
, SA_ZPL_CTIME(zfsvfs
), NULL
, &ctime
, 16);
4350 /* Preserve the mode, mtime and ctime provided by the inode */
4351 ZFS_TIME_ENCODE(&ip
->i_atime
, atime
);
4352 ZFS_TIME_ENCODE(&ip
->i_mtime
, mtime
);
4353 ZFS_TIME_ENCODE(&ip
->i_ctime
, ctime
);
4358 error
= sa_bulk_update(zp
->z_sa_hdl
, bulk
, cnt
, tx
);
4359 mutex_exit(&zp
->z_lock
);
4369 zfs_inactive(struct inode
*ip
)
4371 znode_t
*zp
= ITOZ(ip
);
4372 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4375 int need_unlock
= 0;
4377 /* Only read lock if we haven't already write locked, e.g. rollback */
4378 if (!RW_WRITE_HELD(&zfsvfs
->z_teardown_inactive_lock
)) {
4380 rw_enter(&zfsvfs
->z_teardown_inactive_lock
, RW_READER
);
4382 if (zp
->z_sa_hdl
== NULL
) {
4384 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
4388 if (zp
->z_atime_dirty
&& zp
->z_unlinked
== 0) {
4389 dmu_tx_t
*tx
= dmu_tx_create(zfsvfs
->z_os
);
4391 dmu_tx_hold_sa(tx
, zp
->z_sa_hdl
, B_FALSE
);
4392 zfs_sa_upgrade_txholds(tx
, zp
);
4393 error
= dmu_tx_assign(tx
, TXG_WAIT
);
4397 ZFS_TIME_ENCODE(&ip
->i_atime
, atime
);
4398 mutex_enter(&zp
->z_lock
);
4399 (void) sa_update(zp
->z_sa_hdl
, SA_ZPL_ATIME(zfsvfs
),
4400 (void *)&atime
, sizeof (atime
), tx
);
4401 zp
->z_atime_dirty
= 0;
4402 mutex_exit(&zp
->z_lock
);
4409 rw_exit(&zfsvfs
->z_teardown_inactive_lock
);
4413 * Bounds-check the seek operation.
4415 * IN: ip - inode seeking within
4416 * ooff - old file offset
4417 * noffp - pointer to new file offset
4418 * ct - caller context
4420 * RETURN: 0 if success
4421 * EINVAL if new offset invalid
4425 zfs_seek(struct inode
*ip
, offset_t ooff
, offset_t
*noffp
)
4427 if (S_ISDIR(ip
->i_mode
))
4429 return ((*noffp
< 0 || *noffp
> MAXOFFSET_T
) ? EINVAL
: 0);
4433 * Fill pages with data from the disk.
4436 zfs_fillpage(struct inode
*ip
, struct page
*pl
[], int nr_pages
)
4438 znode_t
*zp
= ITOZ(ip
);
4439 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4441 struct page
*cur_pp
;
4442 u_offset_t io_off
, total
;
4449 io_len
= nr_pages
<< PAGE_SHIFT
;
4450 i_size
= i_size_read(ip
);
4451 io_off
= page_offset(pl
[0]);
4453 if (io_off
+ io_len
> i_size
)
4454 io_len
= i_size
- io_off
;
4457 * Iterate over list of pages and read each page individually.
4460 for (total
= io_off
+ io_len
; io_off
< total
; io_off
+= PAGESIZE
) {
4463 cur_pp
= pl
[page_idx
++];
4465 err
= dmu_read(os
, zp
->z_id
, io_off
, PAGESIZE
, va
,
4469 /* convert checksum errors into IO errors */
4471 err
= SET_ERROR(EIO
);
4480 * Uses zfs_fillpage to read data from the file and fill the pages.
4482 * IN: ip - inode of file to get data from.
4483 * pl - list of pages to read
4484 * nr_pages - number of pages to read
4486 * RETURN: 0 on success, error code on failure.
4489 * vp - atime updated
4493 zfs_getpage(struct inode
*ip
, struct page
*pl
[], int nr_pages
)
4495 znode_t
*zp
= ITOZ(ip
);
4496 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4505 err
= zfs_fillpage(ip
, pl
, nr_pages
);
4512 * Check ZFS specific permissions to memory map a section of a file.
4514 * IN: ip - inode of the file to mmap
4516 * addrp - start address in memory region
4517 * len - length of memory region
4518 * vm_flags- address flags
4520 * RETURN: 0 if success
4521 * error code if failure
4525 zfs_map(struct inode
*ip
, offset_t off
, caddr_t
*addrp
, size_t len
,
4526 unsigned long vm_flags
)
4528 znode_t
*zp
= ITOZ(ip
);
4529 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4534 if ((vm_flags
& VM_WRITE
) && (zp
->z_pflags
&
4535 (ZFS_IMMUTABLE
| ZFS_READONLY
| ZFS_APPENDONLY
))) {
4537 return (SET_ERROR(EPERM
));
4540 if ((vm_flags
& (VM_READ
| VM_EXEC
)) &&
4541 (zp
->z_pflags
& ZFS_AV_QUARANTINED
)) {
4543 return (SET_ERROR(EACCES
));
4546 if (off
< 0 || len
> MAXOFFSET_T
- off
) {
4548 return (SET_ERROR(ENXIO
));
4556 * convoff - converts the given data (start, whence) to the
4560 convoff(struct inode
*ip
, flock64_t
*lckdat
, int whence
, offset_t offset
)
4565 if ((lckdat
->l_whence
== 2) || (whence
== 2)) {
4566 if ((error
= zfs_getattr(ip
, &vap
, 0, CRED())))
4570 switch (lckdat
->l_whence
) {
4572 lckdat
->l_start
+= offset
;
4575 lckdat
->l_start
+= vap
.va_size
;
4580 return (SET_ERROR(EINVAL
));
4583 if (lckdat
->l_start
< 0)
4584 return (SET_ERROR(EINVAL
));
4588 lckdat
->l_start
-= offset
;
4591 lckdat
->l_start
-= vap
.va_size
;
4596 return (SET_ERROR(EINVAL
));
4599 lckdat
->l_whence
= (short)whence
;
4604 * Free or allocate space in a file. Currently, this function only
4605 * supports the `F_FREESP' command. However, this command is somewhat
4606 * misnamed, as its functionality includes the ability to allocate as
4607 * well as free space.
4609 * IN: ip - inode of file to free data in.
4610 * cmd - action to take (only F_FREESP supported).
4611 * bfp - section of file to free/alloc.
4612 * flag - current file open mode flags.
4613 * offset - current file offset.
4614 * cr - credentials of caller [UNUSED].
4616 * RETURN: 0 on success, error code on failure.
4619 * ip - ctime|mtime updated
4623 zfs_space(struct inode
*ip
, int cmd
, flock64_t
*bfp
, int flag
,
4624 offset_t offset
, cred_t
*cr
)
4626 znode_t
*zp
= ITOZ(ip
);
4627 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4634 if (cmd
!= F_FREESP
) {
4636 return (SET_ERROR(EINVAL
));
4640 * Callers might not be able to detect properly that we are read-only,
4641 * so check it explicitly here.
4643 if (zfs_is_readonly(zfsvfs
)) {
4645 return (SET_ERROR(EROFS
));
4648 if ((error
= convoff(ip
, bfp
, 0, offset
))) {
4653 if (bfp
->l_len
< 0) {
4655 return (SET_ERROR(EINVAL
));
4659 * Permissions aren't checked on Solaris because on this OS
4660 * zfs_space() can only be called with an opened file handle.
4661 * On Linux we can get here through truncate_range() which
4662 * operates directly on inodes, so we need to check access rights.
4664 if ((error
= zfs_zaccess(zp
, ACE_WRITE_DATA
, 0, B_FALSE
, cr
))) {
4670 len
= bfp
->l_len
; /* 0 means from off to end of file */
4672 error
= zfs_freesp(zp
, off
, len
, flag
, TRUE
);
4680 zfs_fid(struct inode
*ip
, fid_t
*fidp
)
4682 znode_t
*zp
= ITOZ(ip
);
4683 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4686 uint64_t object
= zp
->z_id
;
4693 if ((error
= sa_lookup(zp
->z_sa_hdl
, SA_ZPL_GEN(zfsvfs
),
4694 &gen64
, sizeof (uint64_t))) != 0) {
4699 gen
= (uint32_t)gen64
;
4701 size
= SHORT_FID_LEN
;
4703 zfid
= (zfid_short_t
*)fidp
;
4705 zfid
->zf_len
= size
;
4707 for (i
= 0; i
< sizeof (zfid
->zf_object
); i
++)
4708 zfid
->zf_object
[i
] = (uint8_t)(object
>> (8 * i
));
4710 /* Must have a non-zero generation number to distinguish from .zfs */
4713 for (i
= 0; i
< sizeof (zfid
->zf_gen
); i
++)
4714 zfid
->zf_gen
[i
] = (uint8_t)(gen
>> (8 * i
));
4722 zfs_getsecattr(struct inode
*ip
, vsecattr_t
*vsecp
, int flag
, cred_t
*cr
)
4724 znode_t
*zp
= ITOZ(ip
);
4725 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4727 boolean_t skipaclchk
= (flag
& ATTR_NOACLCHECK
) ? B_TRUE
: B_FALSE
;
4731 error
= zfs_getacl(zp
, vsecp
, skipaclchk
, cr
);
4739 zfs_setsecattr(struct inode
*ip
, vsecattr_t
*vsecp
, int flag
, cred_t
*cr
)
4741 znode_t
*zp
= ITOZ(ip
);
4742 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4744 boolean_t skipaclchk
= (flag
& ATTR_NOACLCHECK
) ? B_TRUE
: B_FALSE
;
4745 zilog_t
*zilog
= zfsvfs
->z_log
;
4750 error
= zfs_setacl(zp
, vsecp
, skipaclchk
, cr
);
4752 if (zfsvfs
->z_os
->os_sync
== ZFS_SYNC_ALWAYS
)
4753 zil_commit(zilog
, 0);
4759 #ifdef HAVE_UIO_ZEROCOPY
4761 * Tunable, both must be a power of 2.
4763 * zcr_blksz_min: the smallest read we may consider to loan out an arcbuf
4764 * zcr_blksz_max: if set to less than the file block size, allow loaning out of
4765 * an arcbuf for a partial block read
4767 int zcr_blksz_min
= (1 << 10); /* 1K */
4768 int zcr_blksz_max
= (1 << 17); /* 128K */
4772 zfs_reqzcbuf(struct inode
*ip
, enum uio_rw ioflag
, xuio_t
*xuio
, cred_t
*cr
)
4774 znode_t
*zp
= ITOZ(ip
);
4775 zfsvfs_t
*zfsvfs
= ITOZSB(ip
);
4776 int max_blksz
= zfsvfs
->z_max_blksz
;
4777 uio_t
*uio
= &xuio
->xu_uio
;
4778 ssize_t size
= uio
->uio_resid
;
4779 offset_t offset
= uio
->uio_loffset
;
4784 int preamble
, postamble
;
4786 if (xuio
->xu_type
!= UIOTYPE_ZEROCOPY
)
4787 return (SET_ERROR(EINVAL
));
4794 * Loan out an arc_buf for write if write size is bigger than
4795 * max_blksz, and the file's block size is also max_blksz.
4798 if (size
< blksz
|| zp
->z_blksz
!= blksz
) {
4800 return (SET_ERROR(EINVAL
));
4803 * Caller requests buffers for write before knowing where the
4804 * write offset might be (e.g. NFS TCP write).
4809 preamble
= P2PHASE(offset
, blksz
);
4811 preamble
= blksz
- preamble
;
4816 postamble
= P2PHASE(size
, blksz
);
4819 fullblk
= size
/ blksz
;
4820 (void) dmu_xuio_init(xuio
,
4821 (preamble
!= 0) + fullblk
+ (postamble
!= 0));
4824 * Have to fix iov base/len for partial buffers. They
4825 * currently represent full arc_buf's.
4828 /* data begins in the middle of the arc_buf */
4829 abuf
= dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
4832 (void) dmu_xuio_add(xuio
, abuf
,
4833 blksz
- preamble
, preamble
);
4836 for (i
= 0; i
< fullblk
; i
++) {
4837 abuf
= dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
4840 (void) dmu_xuio_add(xuio
, abuf
, 0, blksz
);
4844 /* data ends in the middle of the arc_buf */
4845 abuf
= dmu_request_arcbuf(sa_get_db(zp
->z_sa_hdl
),
4848 (void) dmu_xuio_add(xuio
, abuf
, 0, postamble
);
4853 * Loan out an arc_buf for read if the read size is larger than
4854 * the current file block size. Block alignment is not
4855 * considered. Partial arc_buf will be loaned out for read.
4857 blksz
= zp
->z_blksz
;
4858 if (blksz
< zcr_blksz_min
)
4859 blksz
= zcr_blksz_min
;
4860 if (blksz
> zcr_blksz_max
)
4861 blksz
= zcr_blksz_max
;
4862 /* avoid potential complexity of dealing with it */
4863 if (blksz
> max_blksz
) {
4865 return (SET_ERROR(EINVAL
));
4868 maxsize
= zp
->z_size
- uio
->uio_loffset
;
4874 return (SET_ERROR(EINVAL
));
4879 return (SET_ERROR(EINVAL
));
4882 uio
->uio_extflg
= UIO_XUIO
;
4883 XUIO_XUZC_RW(xuio
) = ioflag
;
4890 zfs_retzcbuf(struct inode
*ip
, xuio_t
*xuio
, cred_t
*cr
)
4894 int ioflag
= XUIO_XUZC_RW(xuio
);
4896 ASSERT(xuio
->xu_type
== UIOTYPE_ZEROCOPY
);
4898 i
= dmu_xuio_cnt(xuio
);
4900 abuf
= dmu_xuio_arcbuf(xuio
, i
);
4902 * if abuf == NULL, it must be a write buffer
4903 * that has been returned in zfs_write().
4906 dmu_return_arcbuf(abuf
);
4907 ASSERT(abuf
|| ioflag
== UIO_WRITE
);
4910 dmu_xuio_fini(xuio
);
4913 #endif /* HAVE_UIO_ZEROCOPY */
4915 #if defined(_KERNEL) && defined(HAVE_SPL)
4916 EXPORT_SYMBOL(zfs_open
);
4917 EXPORT_SYMBOL(zfs_close
);
4918 EXPORT_SYMBOL(zfs_read
);
4919 EXPORT_SYMBOL(zfs_write
);
4920 EXPORT_SYMBOL(zfs_access
);
4921 EXPORT_SYMBOL(zfs_lookup
);
4922 EXPORT_SYMBOL(zfs_create
);
4923 EXPORT_SYMBOL(zfs_tmpfile
);
4924 EXPORT_SYMBOL(zfs_remove
);
4925 EXPORT_SYMBOL(zfs_mkdir
);
4926 EXPORT_SYMBOL(zfs_rmdir
);
4927 EXPORT_SYMBOL(zfs_readdir
);
4928 EXPORT_SYMBOL(zfs_fsync
);
4929 EXPORT_SYMBOL(zfs_getattr
);
4930 EXPORT_SYMBOL(zfs_getattr_fast
);
4931 EXPORT_SYMBOL(zfs_setattr
);
4932 EXPORT_SYMBOL(zfs_rename
);
4933 EXPORT_SYMBOL(zfs_symlink
);
4934 EXPORT_SYMBOL(zfs_readlink
);
4935 EXPORT_SYMBOL(zfs_link
);
4936 EXPORT_SYMBOL(zfs_inactive
);
4937 EXPORT_SYMBOL(zfs_space
);
4938 EXPORT_SYMBOL(zfs_fid
);
4939 EXPORT_SYMBOL(zfs_getsecattr
);
4940 EXPORT_SYMBOL(zfs_setsecattr
);
4941 EXPORT_SYMBOL(zfs_getpage
);
4942 EXPORT_SYMBOL(zfs_putpage
);
4943 EXPORT_SYMBOL(zfs_dirty_inode
);
4944 EXPORT_SYMBOL(zfs_map
);
4947 module_param(zfs_delete_blocks
, ulong
, 0644);
4948 MODULE_PARM_DESC(zfs_delete_blocks
, "Delete files larger than N blocks async");
4949 module_param(zfs_read_chunk_size
, long, 0644);
4950 MODULE_PARM_DESC(zfs_read_chunk_size
, "Bytes to read per chunk");