2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "xfs_types.h"
25 #include "xfs_trans.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_mount.h"
31 #include "xfs_da_btree.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_ialloc_btree.h"
35 #include "xfs_dir2_sf.h"
36 #include "xfs_attr_sf.h"
37 #include "xfs_dinode.h"
38 #include "xfs_inode.h"
39 #include "xfs_inode_item.h"
40 #include "xfs_itable.h"
41 #include "xfs_btree.h"
42 #include "xfs_ialloc.h"
43 #include "xfs_alloc.h"
47 #include "xfs_error.h"
48 #include "xfs_quota.h"
49 #include "xfs_utils.h"
50 #include "xfs_rtalloc.h"
51 #include "xfs_trans_space.h"
52 #include "xfs_log_priv.h"
53 #include "xfs_filestream.h"
54 #include "xfs_vnodeops.h"
62 if (XFS_FORCED_SHUTDOWN(ip
->i_mount
))
63 return XFS_ERROR(EIO
);
66 * If it's a directory with any blocks, read-ahead block 0
67 * as we're almost certain to have the next operation be a read there.
69 if (S_ISDIR(ip
->i_d
.di_mode
) && ip
->i_d
.di_nextents
> 0) {
70 mode
= xfs_ilock_map_shared(ip
);
71 if (ip
->i_d
.di_nextents
> 0)
72 (void)xfs_da_reada_buf(NULL
, ip
, 0, XFS_DATA_FORK
);
73 xfs_iunlock(ip
, mode
);
88 xfs_mount_t
*mp
= ip
->i_mount
;
97 xfs_prid_t projid
=0, iprojid
=0;
98 struct xfs_dquot
*udqp
, *gdqp
, *olddquot1
, *olddquot2
;
102 xfs_itrace_entry(ip
);
104 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
105 return XFS_ERROR(EROFS
);
108 * Cannot set certain attributes.
111 if (mask
& XFS_AT_NOSET
) {
112 return XFS_ERROR(EINVAL
);
115 if (XFS_FORCED_SHUTDOWN(mp
))
116 return XFS_ERROR(EIO
);
119 * Timestamps do not need to be logged and hence do not
120 * need to be done within a transaction.
122 if (mask
& XFS_AT_UPDTIMES
) {
123 ASSERT((mask
& ~XFS_AT_UPDTIMES
) == 0);
124 timeflags
= ((mask
& XFS_AT_UPDATIME
) ? XFS_ICHGTIME_ACC
: 0) |
125 ((mask
& XFS_AT_UPDCTIME
) ? XFS_ICHGTIME_CHG
: 0) |
126 ((mask
& XFS_AT_UPDMTIME
) ? XFS_ICHGTIME_MOD
: 0);
127 xfs_ichgtime(ip
, timeflags
);
131 olddquot1
= olddquot2
= NULL
;
135 * If disk quotas is on, we make sure that the dquots do exist on disk,
136 * before we start any other transactions. Trying to do this later
137 * is messy. We don't care to take a readlock to look at the ids
138 * in inode here, because we can't hold it across the trans_reserve.
139 * If the IDs do change before we take the ilock, we're covered
140 * because the i_*dquot fields will get updated anyway.
142 if (XFS_IS_QUOTA_ON(mp
) &&
143 (mask
& (XFS_AT_UID
|XFS_AT_GID
|XFS_AT_PROJID
))) {
146 if ((mask
& XFS_AT_UID
) && XFS_IS_UQUOTA_ON(mp
)) {
148 qflags
|= XFS_QMOPT_UQUOTA
;
150 uid
= ip
->i_d
.di_uid
;
152 if ((mask
& XFS_AT_GID
) && XFS_IS_GQUOTA_ON(mp
)) {
154 qflags
|= XFS_QMOPT_GQUOTA
;
156 gid
= ip
->i_d
.di_gid
;
158 if ((mask
& XFS_AT_PROJID
) && XFS_IS_PQUOTA_ON(mp
)) {
159 projid
= vap
->va_projid
;
160 qflags
|= XFS_QMOPT_PQUOTA
;
162 projid
= ip
->i_d
.di_projid
;
165 * We take a reference when we initialize udqp and gdqp,
166 * so it is important that we never blindly double trip on
167 * the same variable. See xfs_create() for an example.
169 ASSERT(udqp
== NULL
);
170 ASSERT(gdqp
== NULL
);
171 code
= XFS_QM_DQVOPALLOC(mp
, ip
, uid
, gid
, projid
, qflags
,
178 * For the other attributes, we acquire the inode lock and
179 * first do an error checking pass.
182 lock_flags
= XFS_ILOCK_EXCL
;
183 if (flags
& ATTR_NOLOCK
)
185 if (!(mask
& XFS_AT_SIZE
)) {
186 if ((mask
!= (XFS_AT_CTIME
|XFS_AT_ATIME
|XFS_AT_MTIME
)) ||
187 (mp
->m_flags
& XFS_MOUNT_WSYNC
)) {
188 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
190 if ((code
= xfs_trans_reserve(tp
, 0,
191 XFS_ICHANGE_LOG_RES(mp
), 0,
198 if (DM_EVENT_ENABLED(ip
, DM_EVENT_TRUNCATE
) &&
199 !(flags
& ATTR_DMI
)) {
200 int dmflags
= AT_DELAY_FLAG(flags
) | DM_SEM_FLAG_WR
;
201 code
= XFS_SEND_DATA(mp
, DM_EVENT_TRUNCATE
, ip
,
202 vap
->va_size
, 0, dmflags
, NULL
);
209 lock_flags
|= XFS_IOLOCK_EXCL
;
212 xfs_ilock(ip
, lock_flags
);
214 /* boolean: are we the file owner? */
215 file_owner
= (current_fsuid(credp
) == ip
->i_d
.di_uid
);
218 * Change various properties of a file.
219 * Only the owner or users with CAP_FOWNER
220 * capability may do these things.
223 (XFS_AT_MODE
|XFS_AT_XFLAGS
|XFS_AT_EXTSIZE
|XFS_AT_UID
|
224 XFS_AT_GID
|XFS_AT_PROJID
)) {
226 * CAP_FOWNER overrides the following restrictions:
228 * The user ID of the calling process must be equal
229 * to the file owner ID, except in cases where the
230 * CAP_FSETID capability is applicable.
232 if (!file_owner
&& !capable(CAP_FOWNER
)) {
233 code
= XFS_ERROR(EPERM
);
238 * CAP_FSETID overrides the following restrictions:
240 * The effective user ID of the calling process shall match
241 * the file owner when setting the set-user-ID and
242 * set-group-ID bits on that file.
244 * The effective group ID or one of the supplementary group
245 * IDs of the calling process shall match the group owner of
246 * the file when setting the set-group-ID bit on that file
248 if (mask
& XFS_AT_MODE
) {
251 if ((vap
->va_mode
& S_ISUID
) && !file_owner
)
253 if ((vap
->va_mode
& S_ISGID
) &&
254 !in_group_p((gid_t
)ip
->i_d
.di_gid
))
257 /* Linux allows this, Irix doesn't. */
258 if ((vap
->va_mode
& S_ISVTX
) && !S_ISDIR(ip
->i_d
.di_mode
))
261 if (m
&& !capable(CAP_FSETID
))
267 * Change file ownership. Must be the owner or privileged.
268 * If the system was configured with the "restricted_chown"
269 * option, the owner is not permitted to give away the file,
270 * and can change the group id only to a group of which he
271 * or she is a member.
273 if (mask
& (XFS_AT_UID
|XFS_AT_GID
|XFS_AT_PROJID
)) {
275 * These IDs could have changed since we last looked at them.
276 * But, we're assured that if the ownership did change
277 * while we didn't have the inode locked, inode's dquot(s)
278 * would have changed also.
280 iuid
= ip
->i_d
.di_uid
;
281 iprojid
= ip
->i_d
.di_projid
;
282 igid
= ip
->i_d
.di_gid
;
283 gid
= (mask
& XFS_AT_GID
) ? vap
->va_gid
: igid
;
284 uid
= (mask
& XFS_AT_UID
) ? vap
->va_uid
: iuid
;
285 projid
= (mask
& XFS_AT_PROJID
) ? (xfs_prid_t
)vap
->va_projid
:
289 * CAP_CHOWN overrides the following restrictions:
291 * If _POSIX_CHOWN_RESTRICTED is defined, this capability
292 * shall override the restriction that a process cannot
293 * change the user ID of a file it owns and the restriction
294 * that the group ID supplied to the chown() function
295 * shall be equal to either the group ID or one of the
296 * supplementary group IDs of the calling process.
298 if (restricted_chown
&&
299 (iuid
!= uid
|| (igid
!= gid
&&
300 !in_group_p((gid_t
)gid
))) &&
301 !capable(CAP_CHOWN
)) {
302 code
= XFS_ERROR(EPERM
);
306 * Do a quota reservation only if uid/projid/gid is actually
309 if ((XFS_IS_UQUOTA_ON(mp
) && iuid
!= uid
) ||
310 (XFS_IS_PQUOTA_ON(mp
) && iprojid
!= projid
) ||
311 (XFS_IS_GQUOTA_ON(mp
) && igid
!= gid
)) {
313 code
= XFS_QM_DQVOPCHOWNRESV(mp
, tp
, ip
, udqp
, gdqp
,
314 capable(CAP_FOWNER
) ?
315 XFS_QMOPT_FORCE_RES
: 0);
316 if (code
) /* out of quota */
322 * Truncate file. Must have write permission and not be a directory.
324 if (mask
& XFS_AT_SIZE
) {
325 /* Short circuit the truncate case for zero length files */
326 if ((vap
->va_size
== 0) &&
327 (ip
->i_size
== 0) && (ip
->i_d
.di_nextents
== 0)) {
328 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
329 lock_flags
&= ~XFS_ILOCK_EXCL
;
330 if (mask
& XFS_AT_CTIME
)
331 xfs_ichgtime(ip
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
336 if (S_ISDIR(ip
->i_d
.di_mode
)) {
337 code
= XFS_ERROR(EISDIR
);
339 } else if (!S_ISREG(ip
->i_d
.di_mode
)) {
340 code
= XFS_ERROR(EINVAL
);
344 * Make sure that the dquots are attached to the inode.
346 if ((code
= XFS_QM_DQATTACH(mp
, ip
, XFS_QMOPT_ILOCKED
)))
351 * Change file access or modified times.
353 if (mask
& (XFS_AT_ATIME
|XFS_AT_MTIME
)) {
355 if ((flags
& ATTR_UTIME
) &&
356 !capable(CAP_FOWNER
)) {
357 code
= XFS_ERROR(EPERM
);
364 * Change extent size or realtime flag.
366 if (mask
& (XFS_AT_EXTSIZE
|XFS_AT_XFLAGS
)) {
368 * Can't change extent size if any extents are allocated.
370 if (ip
->i_d
.di_nextents
&& (mask
& XFS_AT_EXTSIZE
) &&
371 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
373 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
378 * Can't change realtime flag if any extents are allocated.
380 if ((ip
->i_d
.di_nextents
|| ip
->i_delayed_blks
) &&
381 (mask
& XFS_AT_XFLAGS
) &&
382 (XFS_IS_REALTIME_INODE(ip
)) !=
383 (vap
->va_xflags
& XFS_XFLAG_REALTIME
)) {
384 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
388 * Extent size must be a multiple of the appropriate block
389 * size, if set at all.
391 if ((mask
& XFS_AT_EXTSIZE
) && vap
->va_extsize
!= 0) {
394 if (XFS_IS_REALTIME_INODE(ip
) ||
395 ((mask
& XFS_AT_XFLAGS
) &&
396 (vap
->va_xflags
& XFS_XFLAG_REALTIME
))) {
397 size
= mp
->m_sb
.sb_rextsize
<<
398 mp
->m_sb
.sb_blocklog
;
400 size
= mp
->m_sb
.sb_blocksize
;
402 if (vap
->va_extsize
% size
) {
403 code
= XFS_ERROR(EINVAL
);
408 * If realtime flag is set then must have realtime data.
410 if ((mask
& XFS_AT_XFLAGS
) &&
411 (vap
->va_xflags
& XFS_XFLAG_REALTIME
)) {
412 if ((mp
->m_sb
.sb_rblocks
== 0) ||
413 (mp
->m_sb
.sb_rextsize
== 0) ||
414 (ip
->i_d
.di_extsize
% mp
->m_sb
.sb_rextsize
)) {
415 code
= XFS_ERROR(EINVAL
);
421 * Can't modify an immutable/append-only file unless
422 * we have appropriate permission.
424 if ((mask
& XFS_AT_XFLAGS
) &&
426 (XFS_DIFLAG_IMMUTABLE
|XFS_DIFLAG_APPEND
) ||
428 (XFS_XFLAG_IMMUTABLE
| XFS_XFLAG_APPEND
))) &&
429 !capable(CAP_LINUX_IMMUTABLE
)) {
430 code
= XFS_ERROR(EPERM
);
436 * Now we can make the changes. Before we join the inode
437 * to the transaction, if XFS_AT_SIZE is set then take care of
438 * the part of the truncation that must be done without the
439 * inode lock. This needs to be done before joining the inode
440 * to the transaction, because the inode cannot be unlocked
441 * once it is a part of the transaction.
443 if (mask
& XFS_AT_SIZE
) {
445 if ((vap
->va_size
> ip
->i_size
) &&
446 (flags
& ATTR_NOSIZETOK
) == 0) {
448 * Do the first part of growing a file: zero any data
449 * in the last block that is beyond the old EOF. We
450 * need to do this before the inode is joined to the
451 * transaction to modify the i_size.
453 code
= xfs_zero_eof(ip
, vap
->va_size
, ip
->i_size
);
455 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
458 * We are going to log the inode size change in this
459 * transaction so any previous writes that are beyond the on
460 * disk EOF and the new EOF that have not been written out need
461 * to be written here. If we do not write the data out, we
462 * expose ourselves to the null files problem.
464 * Only flush from the on disk size to the smaller of the in
465 * memory file size or the new size as that's the range we
466 * really care about here and prevents waiting for other data
467 * not within the range we care about here.
470 (ip
->i_size
!= ip
->i_d
.di_size
) &&
471 (vap
->va_size
> ip
->i_d
.di_size
)) {
472 code
= xfs_flush_pages(ip
,
473 ip
->i_d
.di_size
, vap
->va_size
,
474 XFS_B_ASYNC
, FI_NONE
);
477 /* wait for all I/O to complete */
481 code
= xfs_itruncate_data(ip
, vap
->va_size
);
484 lock_flags
&= ~XFS_ILOCK_EXCL
;
485 ASSERT(lock_flags
== XFS_IOLOCK_EXCL
);
488 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_SIZE
);
489 if ((code
= xfs_trans_reserve(tp
, 0,
490 XFS_ITRUNCATE_LOG_RES(mp
), 0,
491 XFS_TRANS_PERM_LOG_RES
,
492 XFS_ITRUNCATE_LOG_COUNT
))) {
493 xfs_trans_cancel(tp
, 0);
495 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
498 commit_flags
= XFS_TRANS_RELEASE_LOG_RES
;
499 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
503 xfs_trans_ijoin(tp
, ip
, lock_flags
);
504 xfs_trans_ihold(tp
, ip
);
508 * Truncate file. Must have write permission and not be a directory.
510 if (mask
& XFS_AT_SIZE
) {
512 * Only change the c/mtime if we are changing the size
513 * or we are explicitly asked to change it. This handles
514 * the semantic difference between truncate() and ftruncate()
515 * as implemented in the VFS.
517 if (vap
->va_size
!= ip
->i_size
|| (mask
& XFS_AT_CTIME
))
518 timeflags
|= XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
;
520 if (vap
->va_size
> ip
->i_size
) {
521 ip
->i_d
.di_size
= vap
->va_size
;
522 ip
->i_size
= vap
->va_size
;
523 if (!(flags
& ATTR_DMI
))
524 xfs_ichgtime(ip
, XFS_ICHGTIME_CHG
);
525 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
526 } else if ((vap
->va_size
<= ip
->i_size
) ||
527 ((vap
->va_size
== 0) && ip
->i_d
.di_nextents
)) {
529 * signal a sync transaction unless
530 * we're truncating an already unlinked
531 * file on a wsync filesystem
533 code
= xfs_itruncate_finish(&tp
, ip
,
534 (xfs_fsize_t
)vap
->va_size
,
536 ((ip
->i_d
.di_nlink
!= 0 ||
537 !(mp
->m_flags
& XFS_MOUNT_WSYNC
))
542 * Truncated "down", so we're removing references
543 * to old data here - if we now delay flushing for
544 * a long time, we expose ourselves unduly to the
545 * notorious NULL files problem. So, we mark this
546 * vnode and flush it when the file is closed, and
547 * do not wait the usual (long) time for writeout.
549 xfs_iflags_set(ip
, XFS_ITRUNCATED
);
554 * Change file access modes.
556 if (mask
& XFS_AT_MODE
) {
557 ip
->i_d
.di_mode
&= S_IFMT
;
558 ip
->i_d
.di_mode
|= vap
->va_mode
& ~S_IFMT
;
560 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
561 timeflags
|= XFS_ICHGTIME_CHG
;
565 * Change file ownership. Must be the owner or privileged.
566 * If the system was configured with the "restricted_chown"
567 * option, the owner is not permitted to give away the file,
568 * and can change the group id only to a group of which he
569 * or she is a member.
571 if (mask
& (XFS_AT_UID
|XFS_AT_GID
|XFS_AT_PROJID
)) {
573 * CAP_FSETID overrides the following restrictions:
575 * The set-user-ID and set-group-ID bits of a file will be
576 * cleared upon successful return from chown()
578 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
579 !capable(CAP_FSETID
)) {
580 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
584 * Change the ownerships and register quota modifications
585 * in the transaction.
588 if (XFS_IS_UQUOTA_ON(mp
)) {
589 ASSERT(mask
& XFS_AT_UID
);
591 olddquot1
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
592 &ip
->i_udquot
, udqp
);
594 ip
->i_d
.di_uid
= uid
;
597 if (XFS_IS_GQUOTA_ON(mp
)) {
598 ASSERT(!XFS_IS_PQUOTA_ON(mp
));
599 ASSERT(mask
& XFS_AT_GID
);
601 olddquot2
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
602 &ip
->i_gdquot
, gdqp
);
604 ip
->i_d
.di_gid
= gid
;
606 if (iprojid
!= projid
) {
607 if (XFS_IS_PQUOTA_ON(mp
)) {
608 ASSERT(!XFS_IS_GQUOTA_ON(mp
));
609 ASSERT(mask
& XFS_AT_PROJID
);
611 olddquot2
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
612 &ip
->i_gdquot
, gdqp
);
614 ip
->i_d
.di_projid
= projid
;
616 * We may have to rev the inode as well as
617 * the superblock version number since projids didn't
618 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
620 if (ip
->i_d
.di_version
== XFS_DINODE_VERSION_1
)
621 xfs_bump_ino_vers2(tp
, ip
);
624 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
625 timeflags
|= XFS_ICHGTIME_CHG
;
630 * Change file access or modified times.
632 if (mask
& (XFS_AT_ATIME
|XFS_AT_MTIME
)) {
633 if (mask
& XFS_AT_ATIME
) {
634 ip
->i_d
.di_atime
.t_sec
= vap
->va_atime
.tv_sec
;
635 ip
->i_d
.di_atime
.t_nsec
= vap
->va_atime
.tv_nsec
;
636 ip
->i_update_core
= 1;
637 timeflags
&= ~XFS_ICHGTIME_ACC
;
639 if (mask
& XFS_AT_MTIME
) {
640 ip
->i_d
.di_mtime
.t_sec
= vap
->va_mtime
.tv_sec
;
641 ip
->i_d
.di_mtime
.t_nsec
= vap
->va_mtime
.tv_nsec
;
642 timeflags
&= ~XFS_ICHGTIME_MOD
;
643 timeflags
|= XFS_ICHGTIME_CHG
;
645 if (tp
&& (flags
& ATTR_UTIME
))
646 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
650 * Change XFS-added attributes.
652 if (mask
& (XFS_AT_EXTSIZE
|XFS_AT_XFLAGS
)) {
653 if (mask
& XFS_AT_EXTSIZE
) {
655 * Converting bytes to fs blocks.
657 ip
->i_d
.di_extsize
= vap
->va_extsize
>>
658 mp
->m_sb
.sb_blocklog
;
660 if (mask
& XFS_AT_XFLAGS
) {
663 /* can't set PREALLOC this way, just preserve it */
664 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
665 if (vap
->va_xflags
& XFS_XFLAG_IMMUTABLE
)
666 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
667 if (vap
->va_xflags
& XFS_XFLAG_APPEND
)
668 di_flags
|= XFS_DIFLAG_APPEND
;
669 if (vap
->va_xflags
& XFS_XFLAG_SYNC
)
670 di_flags
|= XFS_DIFLAG_SYNC
;
671 if (vap
->va_xflags
& XFS_XFLAG_NOATIME
)
672 di_flags
|= XFS_DIFLAG_NOATIME
;
673 if (vap
->va_xflags
& XFS_XFLAG_NODUMP
)
674 di_flags
|= XFS_DIFLAG_NODUMP
;
675 if (vap
->va_xflags
& XFS_XFLAG_PROJINHERIT
)
676 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
677 if (vap
->va_xflags
& XFS_XFLAG_NODEFRAG
)
678 di_flags
|= XFS_DIFLAG_NODEFRAG
;
679 if (vap
->va_xflags
& XFS_XFLAG_FILESTREAM
)
680 di_flags
|= XFS_DIFLAG_FILESTREAM
;
681 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFDIR
) {
682 if (vap
->va_xflags
& XFS_XFLAG_RTINHERIT
)
683 di_flags
|= XFS_DIFLAG_RTINHERIT
;
684 if (vap
->va_xflags
& XFS_XFLAG_NOSYMLINKS
)
685 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
686 if (vap
->va_xflags
& XFS_XFLAG_EXTSZINHERIT
)
687 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
688 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) {
689 if (vap
->va_xflags
& XFS_XFLAG_REALTIME
)
690 di_flags
|= XFS_DIFLAG_REALTIME
;
691 if (vap
->va_xflags
& XFS_XFLAG_EXTSIZE
)
692 di_flags
|= XFS_DIFLAG_EXTSIZE
;
694 ip
->i_d
.di_flags
= di_flags
;
696 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
697 timeflags
|= XFS_ICHGTIME_CHG
;
701 * Change file inode change time only if XFS_AT_CTIME set
702 * AND we have been called by a DMI function.
705 if ( (flags
& ATTR_DMI
) && (mask
& XFS_AT_CTIME
) ) {
706 ip
->i_d
.di_ctime
.t_sec
= vap
->va_ctime
.tv_sec
;
707 ip
->i_d
.di_ctime
.t_nsec
= vap
->va_ctime
.tv_nsec
;
708 ip
->i_update_core
= 1;
709 timeflags
&= ~XFS_ICHGTIME_CHG
;
713 * Send out timestamp changes that need to be set to the
714 * current time. Not done when called by a DMI function.
716 if (timeflags
&& !(flags
& ATTR_DMI
))
717 xfs_ichgtime(ip
, timeflags
);
719 XFS_STATS_INC(xs_ig_attrchg
);
722 * If this is a synchronous mount, make sure that the
723 * transaction goes to disk before returning to the user.
724 * This is slightly sub-optimal in that truncates require
725 * two sync transactions instead of one for wsync filesystems.
726 * One for the truncate and one for the timestamps since we
727 * don't want to change the timestamps unless we're sure the
728 * truncate worked. Truncates are less than 1% of the laddis
729 * mix so this probably isn't worth the trouble to optimize.
733 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
734 xfs_trans_set_sync(tp
);
736 code
= xfs_trans_commit(tp
, commit_flags
);
739 xfs_iunlock(ip
, lock_flags
);
742 * Release any dquot(s) the inode had kept before chown.
744 XFS_QM_DQRELE(mp
, olddquot1
);
745 XFS_QM_DQRELE(mp
, olddquot2
);
746 XFS_QM_DQRELE(mp
, udqp
);
747 XFS_QM_DQRELE(mp
, gdqp
);
753 if (DM_EVENT_ENABLED(ip
, DM_EVENT_ATTRIBUTE
) &&
754 !(flags
& ATTR_DMI
)) {
755 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, ip
, DM_RIGHT_NULL
,
756 NULL
, DM_RIGHT_NULL
, NULL
, NULL
,
757 0, 0, AT_DELAY_FLAG(flags
));
762 commit_flags
|= XFS_TRANS_ABORT
;
765 XFS_QM_DQRELE(mp
, udqp
);
766 XFS_QM_DQRELE(mp
, gdqp
);
768 xfs_trans_cancel(tp
, commit_flags
);
770 if (lock_flags
!= 0) {
771 xfs_iunlock(ip
, lock_flags
);
777 * The maximum pathlen is 1024 bytes. Since the minimum file system
778 * blocksize is 512 bytes, we can get a max of 2 extents back from
781 #define SYMLINK_MAPS 2
788 xfs_mount_t
*mp
= ip
->i_mount
;
789 int pathlen
= ip
->i_d
.di_size
;
790 int nmaps
= SYMLINK_MAPS
;
791 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
798 error
= xfs_bmapi(NULL
, ip
, 0, XFS_B_TO_FSB(mp
, pathlen
), 0, NULL
, 0,
799 mval
, &nmaps
, NULL
, NULL
);
803 for (n
= 0; n
< nmaps
; n
++) {
804 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
805 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
807 bp
= xfs_buf_read(mp
->m_ddev_targp
, d
, BTOBB(byte_cnt
), 0);
808 error
= XFS_BUF_GETERROR(bp
);
810 xfs_ioerror_alert("xfs_readlink",
811 ip
->i_mount
, bp
, XFS_BUF_ADDR(bp
));
815 if (pathlen
< byte_cnt
)
819 memcpy(link
, XFS_BUF_PTR(bp
), byte_cnt
);
823 link
[ip
->i_d
.di_size
] = '\0';
835 xfs_mount_t
*mp
= ip
->i_mount
;
839 xfs_itrace_entry(ip
);
841 if (XFS_FORCED_SHUTDOWN(mp
))
842 return XFS_ERROR(EIO
);
844 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
846 ASSERT((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
);
847 ASSERT(ip
->i_d
.di_size
<= MAXPATHLEN
);
849 pathlen
= ip
->i_d
.di_size
;
853 if (ip
->i_df
.if_flags
& XFS_IFINLINE
) {
854 memcpy(link
, ip
->i_df
.if_u1
.if_data
, pathlen
);
855 link
[pathlen
] = '\0';
857 error
= xfs_readlink_bmap(ip
, link
);
861 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
868 * This is called to sync the inode and its data out to disk. We need to hold
869 * the I/O lock while flushing the data, and the inode lock while flushing the
870 * inode. The inode lock CANNOT be held while flushing the data, so acquire
871 * after we're done with that.
879 int log_flushed
= 0, changed
= 1;
881 xfs_itrace_entry(ip
);
883 if (XFS_FORCED_SHUTDOWN(ip
->i_mount
))
884 return XFS_ERROR(EIO
);
886 /* capture size updates in I/O completion before writing the inode. */
887 error
= filemap_fdatawait(vn_to_inode(XFS_ITOV(ip
))->i_mapping
);
889 return XFS_ERROR(error
);
892 * We always need to make sure that the required inode state is safe on
893 * disk. The vnode might be clean but we still might need to force the
894 * log because of committed transactions that haven't hit the disk yet.
895 * Likewise, there could be unflushed non-transactional changes to the
896 * inode core that have to go to disk and this requires us to issue
897 * a synchronous transaction to capture these changes correctly.
899 * This code relies on the assumption that if the update_* fields
900 * of the inode are clear and the inode is unpinned then it is clean
901 * and no action is required.
903 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
905 if (!(ip
->i_update_size
|| ip
->i_update_core
)) {
907 * Timestamps/size haven't changed since last inode flush or
908 * inode transaction commit. That means either nothing got
909 * written or a transaction committed which caught the updates.
910 * If the latter happened and the transaction hasn't hit the
911 * disk yet, the inode will be still be pinned. If it is,
915 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
917 if (xfs_ipincount(ip
)) {
918 error
= _xfs_log_force(ip
->i_mount
, (xfs_lsn_t
)0,
919 XFS_LOG_FORCE
| XFS_LOG_SYNC
,
923 * If the inode is not pinned and nothing has changed
924 * we don't need to flush the cache.
930 * Kick off a transaction to log the inode core to get the
931 * updates. The sync transaction will also force the log.
933 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
934 tp
= xfs_trans_alloc(ip
->i_mount
, XFS_TRANS_FSYNC_TS
);
935 error
= xfs_trans_reserve(tp
, 0,
936 XFS_FSYNC_TS_LOG_RES(ip
->i_mount
), 0, 0, 0);
938 xfs_trans_cancel(tp
, 0);
941 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
944 * Note - it's possible that we might have pushed ourselves out
945 * of the way during trans_reserve which would flush the inode.
946 * But there's no guarantee that the inode buffer has actually
947 * gone out yet (it's delwri). Plus the buffer could be pinned
948 * anyway if it's part of an inode in another recent
949 * transaction. So we play it safe and fire off the
950 * transaction anyway.
952 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
953 xfs_trans_ihold(tp
, ip
);
954 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
955 xfs_trans_set_sync(tp
);
956 error
= _xfs_trans_commit(tp
, 0, &log_flushed
);
958 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
961 if ((ip
->i_mount
->m_flags
& XFS_MOUNT_BARRIER
) && changed
) {
963 * If the log write didn't issue an ordered tag we need
964 * to flush the disk cache for the data device now.
967 xfs_blkdev_issue_flush(ip
->i_mount
->m_ddev_targp
);
970 * If this inode is on the RT dev we need to flush that
973 if (XFS_IS_REALTIME_INODE(ip
))
974 xfs_blkdev_issue_flush(ip
->i_mount
->m_rtdev_targp
);
981 * This is called by xfs_inactive to free any blocks beyond eof
982 * when the link count isn't zero and by xfs_dm_punch_hole() when
983 * punching a hole to EOF.
993 xfs_fileoff_t end_fsb
;
994 xfs_fileoff_t last_fsb
;
995 xfs_filblks_t map_len
;
997 xfs_bmbt_irec_t imap
;
998 int use_iolock
= (flags
& XFS_FREE_EOF_LOCK
);
1001 * Figure out if there are any blocks beyond the end
1002 * of the file. If not, then there is nothing to do.
1004 end_fsb
= XFS_B_TO_FSB(mp
, ((xfs_ufsize_t
)ip
->i_size
));
1005 last_fsb
= XFS_B_TO_FSB(mp
, (xfs_ufsize_t
)XFS_MAXIOFFSET(mp
));
1006 map_len
= last_fsb
- end_fsb
;
1011 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1012 error
= xfs_bmapi(NULL
, ip
, end_fsb
, map_len
, 0,
1013 NULL
, 0, &imap
, &nimaps
, NULL
, NULL
);
1014 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1016 if (!error
&& (nimaps
!= 0) &&
1017 (imap
.br_startblock
!= HOLESTARTBLOCK
||
1018 ip
->i_delayed_blks
)) {
1020 * Attach the dquots to the inode up front.
1022 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
1026 * There are blocks after the end of file.
1027 * Free them up now by truncating the file to
1030 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1033 * Do the xfs_itruncate_start() call before
1034 * reserving any log space because
1035 * itruncate_start will call into the buffer
1036 * cache and we can't
1037 * do that within a transaction.
1040 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
1041 error
= xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
,
1044 xfs_trans_cancel(tp
, 0);
1046 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1050 error
= xfs_trans_reserve(tp
, 0,
1051 XFS_ITRUNCATE_LOG_RES(mp
),
1052 0, XFS_TRANS_PERM_LOG_RES
,
1053 XFS_ITRUNCATE_LOG_COUNT
);
1055 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1056 xfs_trans_cancel(tp
, 0);
1057 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1061 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1062 xfs_trans_ijoin(tp
, ip
,
1065 xfs_trans_ihold(tp
, ip
);
1067 error
= xfs_itruncate_finish(&tp
, ip
,
1072 * If we get an error at this point we
1073 * simply don't bother truncating the file.
1076 xfs_trans_cancel(tp
,
1077 (XFS_TRANS_RELEASE_LOG_RES
|
1080 error
= xfs_trans_commit(tp
,
1081 XFS_TRANS_RELEASE_LOG_RES
);
1083 xfs_iunlock(ip
, (use_iolock
? (XFS_IOLOCK_EXCL
|XFS_ILOCK_EXCL
)
1090 * Free a symlink that has blocks associated with it.
1093 xfs_inactive_symlink_rmt(
1101 xfs_fsblock_t first_block
;
1102 xfs_bmap_free_t free_list
;
1105 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
1113 ASSERT(ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
));
1115 * We're freeing a symlink that has some
1116 * blocks allocated to it. Free the
1117 * blocks here. We know that we've got
1118 * either 1 or 2 extents and that we can
1119 * free them all in one bunmapi call.
1121 ASSERT(ip
->i_d
.di_nextents
> 0 && ip
->i_d
.di_nextents
<= 2);
1122 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
1123 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
1124 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1125 xfs_trans_cancel(tp
, 0);
1130 * Lock the inode, fix the size, and join it to the transaction.
1131 * Hold it so in the normal path, we still have it locked for
1132 * the second transaction. In the error paths we need it
1133 * held so the cancel won't rele it, see below.
1135 xfs_ilock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1136 size
= (int)ip
->i_d
.di_size
;
1137 ip
->i_d
.di_size
= 0;
1138 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1139 xfs_trans_ihold(tp
, ip
);
1140 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1142 * Find the block(s) so we can inval and unmap them.
1145 XFS_BMAP_INIT(&free_list
, &first_block
);
1146 nmaps
= ARRAY_SIZE(mval
);
1147 if ((error
= xfs_bmapi(tp
, ip
, 0, XFS_B_TO_FSB(mp
, size
),
1148 XFS_BMAPI_METADATA
, &first_block
, 0, mval
, &nmaps
,
1152 * Invalidate the block(s).
1154 for (i
= 0; i
< nmaps
; i
++) {
1155 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
,
1156 XFS_FSB_TO_DADDR(mp
, mval
[i
].br_startblock
),
1157 XFS_FSB_TO_BB(mp
, mval
[i
].br_blockcount
), 0);
1158 xfs_trans_binval(tp
, bp
);
1161 * Unmap the dead block(s) to the free_list.
1163 if ((error
= xfs_bunmapi(tp
, ip
, 0, size
, XFS_BMAPI_METADATA
, nmaps
,
1164 &first_block
, &free_list
, NULL
, &done
)))
1168 * Commit the first transaction. This logs the EFI and the inode.
1170 if ((error
= xfs_bmap_finish(&tp
, &free_list
, &committed
)))
1173 * The transaction must have been committed, since there were
1174 * actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
1175 * The new tp has the extent freeing and EFDs.
1179 * The first xact was committed, so add the inode to the new one.
1180 * Mark it dirty so it will be logged and moved forward in the log as
1181 * part of every commit.
1183 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1184 xfs_trans_ihold(tp
, ip
);
1185 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1187 * Get a new, empty transaction to return to our caller.
1189 ntp
= xfs_trans_dup(tp
);
1191 * Commit the transaction containing extent freeing and EFDs.
1192 * If we get an error on the commit here or on the reserve below,
1193 * we need to unlock the inode since the new transaction doesn't
1194 * have the inode attached.
1196 error
= xfs_trans_commit(tp
, 0);
1199 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1203 * Remove the memory for extent descriptions (just bookkeeping).
1205 if (ip
->i_df
.if_bytes
)
1206 xfs_idata_realloc(ip
, -ip
->i_df
.if_bytes
, XFS_DATA_FORK
);
1207 ASSERT(ip
->i_df
.if_bytes
== 0);
1209 * Put an itruncate log reservation in the new transaction
1212 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
1213 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
1214 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1218 * Return with the inode locked but not joined to the transaction.
1224 xfs_bmap_cancel(&free_list
);
1227 * Have to come here with the inode locked and either
1228 * (held and in the transaction) or (not in the transaction).
1229 * If the inode isn't held then cancel would iput it, but
1230 * that's wrong since this is inactive and the vnode ref
1231 * count is 0 already.
1232 * Cancel won't do anything to the inode if held, but it still
1233 * needs to be locked until the cancel is done, if it was
1234 * joined to the transaction.
1236 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1237 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1244 xfs_inactive_symlink_local(
1250 ASSERT(ip
->i_d
.di_size
<= XFS_IFORK_DSIZE(ip
));
1252 * We're freeing a symlink which fit into
1253 * the inode. Just free the memory used
1254 * to hold the old symlink.
1256 error
= xfs_trans_reserve(*tpp
, 0,
1257 XFS_ITRUNCATE_LOG_RES(ip
->i_mount
),
1258 0, XFS_TRANS_PERM_LOG_RES
,
1259 XFS_ITRUNCATE_LOG_COUNT
);
1262 xfs_trans_cancel(*tpp
, 0);
1266 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1269 * Zero length symlinks _can_ exist.
1271 if (ip
->i_df
.if_bytes
> 0) {
1272 xfs_idata_realloc(ip
,
1273 -(ip
->i_df
.if_bytes
),
1275 ASSERT(ip
->i_df
.if_bytes
== 0);
1289 ASSERT(xfs_isilocked(ip
, XFS_IOLOCK_EXCL
));
1292 ASSERT(ip
->i_d
.di_forkoff
!= 0);
1293 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
1294 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1298 error
= xfs_attr_inactive(ip
);
1302 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1303 error
= xfs_trans_reserve(tp
, 0,
1304 XFS_IFREE_LOG_RES(mp
),
1305 0, XFS_TRANS_PERM_LOG_RES
,
1306 XFS_INACTIVE_LOG_COUNT
);
1310 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1311 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1312 xfs_trans_ihold(tp
, ip
);
1313 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1315 ASSERT(ip
->i_d
.di_anextents
== 0);
1321 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1322 xfs_trans_cancel(tp
, 0);
1325 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1333 bhv_vnode_t
*vp
= XFS_ITOV(ip
);
1334 xfs_mount_t
*mp
= ip
->i_mount
;
1337 if (!S_ISREG(ip
->i_d
.di_mode
) || (ip
->i_d
.di_mode
== 0))
1340 /* If this is a read-only mount, don't do this (would generate I/O) */
1341 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
1344 if (!XFS_FORCED_SHUTDOWN(mp
)) {
1348 * If we are using filestreams, and we have an unlinked
1349 * file that we are processing the last close on, then nothing
1350 * will be able to reopen and write to this file. Purge this
1351 * inode from the filestreams cache so that it doesn't delay
1352 * teardown of the inode.
1354 if ((ip
->i_d
.di_nlink
== 0) && xfs_inode_is_filestream(ip
))
1355 xfs_filestream_deassociate(ip
);
1358 * If we previously truncated this file and removed old data
1359 * in the process, we want to initiate "early" writeout on
1360 * the last close. This is an attempt to combat the notorious
1361 * NULL files problem which is particularly noticable from a
1362 * truncate down, buffered (re-)write (delalloc), followed by
1363 * a crash. What we are effectively doing here is
1364 * significantly reducing the time window where we'd otherwise
1365 * be exposed to that problem.
1367 truncated
= xfs_iflags_test_and_clear(ip
, XFS_ITRUNCATED
);
1368 if (truncated
&& VN_DIRTY(vp
) && ip
->i_delayed_blks
> 0)
1369 xfs_flush_pages(ip
, 0, -1, XFS_B_ASYNC
, FI_NONE
);
1372 if (ip
->i_d
.di_nlink
!= 0) {
1373 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1374 ((ip
->i_size
> 0) || (VN_CACHED(vp
) > 0 ||
1375 ip
->i_delayed_blks
> 0)) &&
1376 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)) &&
1377 (!(ip
->i_d
.di_flags
&
1378 (XFS_DIFLAG_PREALLOC
| XFS_DIFLAG_APPEND
)))) {
1379 error
= xfs_free_eofblocks(mp
, ip
, XFS_FREE_EOF_LOCK
);
1391 * This is called when the vnode reference count for the vnode
1392 * goes to zero. If the file has been unlinked, then it must
1393 * now be truncated. Also, we clear all of the read-ahead state
1394 * kept for the inode here since the file is now closed.
1400 bhv_vnode_t
*vp
= XFS_ITOV(ip
);
1401 xfs_bmap_free_t free_list
;
1402 xfs_fsblock_t first_block
;
1409 xfs_itrace_entry(ip
);
1412 * If the inode is already free, then there can be nothing
1415 if (ip
->i_d
.di_mode
== 0 || VN_BAD(vp
)) {
1416 ASSERT(ip
->i_df
.if_real_bytes
== 0);
1417 ASSERT(ip
->i_df
.if_broot_bytes
== 0);
1418 return VN_INACTIVE_CACHE
;
1422 * Only do a truncate if it's a regular file with
1423 * some actual space in it. It's OK to look at the
1424 * inode's fields without the lock because we're the
1425 * only one with a reference to the inode.
1427 truncate
= ((ip
->i_d
.di_nlink
== 0) &&
1428 ((ip
->i_d
.di_size
!= 0) || (ip
->i_size
!= 0) ||
1429 (ip
->i_d
.di_nextents
> 0) || (ip
->i_delayed_blks
> 0)) &&
1430 ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
));
1434 if (ip
->i_d
.di_nlink
== 0 && DM_EVENT_ENABLED(ip
, DM_EVENT_DESTROY
))
1435 XFS_SEND_DESTROY(mp
, ip
, DM_RIGHT_NULL
);
1439 /* If this is a read-only mount, don't do this (would generate I/O) */
1440 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
1443 if (ip
->i_d
.di_nlink
!= 0) {
1444 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1445 ((ip
->i_size
> 0) || (VN_CACHED(vp
) > 0 ||
1446 ip
->i_delayed_blks
> 0)) &&
1447 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
) &&
1448 (!(ip
->i_d
.di_flags
&
1449 (XFS_DIFLAG_PREALLOC
| XFS_DIFLAG_APPEND
)) ||
1450 (ip
->i_delayed_blks
!= 0)))) {
1451 error
= xfs_free_eofblocks(mp
, ip
, XFS_FREE_EOF_LOCK
);
1453 return VN_INACTIVE_CACHE
;
1458 ASSERT(ip
->i_d
.di_nlink
== 0);
1460 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
1461 return VN_INACTIVE_CACHE
;
1463 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1466 * Do the xfs_itruncate_start() call before
1467 * reserving any log space because itruncate_start
1468 * will call into the buffer cache and we can't
1469 * do that within a transaction.
1471 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
1473 error
= xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
, 0);
1475 xfs_trans_cancel(tp
, 0);
1476 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1477 return VN_INACTIVE_CACHE
;
1480 error
= xfs_trans_reserve(tp
, 0,
1481 XFS_ITRUNCATE_LOG_RES(mp
),
1482 0, XFS_TRANS_PERM_LOG_RES
,
1483 XFS_ITRUNCATE_LOG_COUNT
);
1485 /* Don't call itruncate_cleanup */
1486 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1487 xfs_trans_cancel(tp
, 0);
1488 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1489 return VN_INACTIVE_CACHE
;
1492 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1493 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1494 xfs_trans_ihold(tp
, ip
);
1497 * normally, we have to run xfs_itruncate_finish sync.
1498 * But if filesystem is wsync and we're in the inactive
1499 * path, then we know that nlink == 0, and that the
1500 * xaction that made nlink == 0 is permanently committed
1501 * since xfs_remove runs as a synchronous transaction.
1503 error
= xfs_itruncate_finish(&tp
, ip
, 0, XFS_DATA_FORK
,
1504 (!(mp
->m_flags
& XFS_MOUNT_WSYNC
) ? 1 : 0));
1507 xfs_trans_cancel(tp
,
1508 XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1509 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1510 return VN_INACTIVE_CACHE
;
1512 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
) {
1515 * If we get an error while cleaning up a
1516 * symlink we bail out.
1518 error
= (ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
)) ?
1519 xfs_inactive_symlink_rmt(ip
, &tp
) :
1520 xfs_inactive_symlink_local(ip
, &tp
);
1524 return VN_INACTIVE_CACHE
;
1527 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1528 xfs_trans_ihold(tp
, ip
);
1530 error
= xfs_trans_reserve(tp
, 0,
1531 XFS_IFREE_LOG_RES(mp
),
1532 0, XFS_TRANS_PERM_LOG_RES
,
1533 XFS_INACTIVE_LOG_COUNT
);
1535 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1536 xfs_trans_cancel(tp
, 0);
1537 return VN_INACTIVE_CACHE
;
1540 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1541 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1542 xfs_trans_ihold(tp
, ip
);
1546 * If there are attributes associated with the file
1547 * then blow them away now. The code calls a routine
1548 * that recursively deconstructs the attribute fork.
1549 * We need to just commit the current transaction
1550 * because we can't use it for xfs_attr_inactive().
1552 if (ip
->i_d
.di_anextents
> 0) {
1553 error
= xfs_inactive_attrs(ip
, &tp
);
1555 * If we got an error, the transaction is already
1556 * cancelled, and the inode is unlocked. Just get out.
1559 return VN_INACTIVE_CACHE
;
1560 } else if (ip
->i_afp
) {
1561 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1567 XFS_BMAP_INIT(&free_list
, &first_block
);
1568 error
= xfs_ifree(tp
, ip
, &free_list
);
1571 * If we fail to free the inode, shut down. The cancel
1572 * might do that, we need to make sure. Otherwise the
1573 * inode might be lost for a long time or forever.
1575 if (!XFS_FORCED_SHUTDOWN(mp
)) {
1577 "xfs_inactive: xfs_ifree() returned an error = %d on %s",
1578 error
, mp
->m_fsname
);
1579 xfs_force_shutdown(mp
, SHUTDOWN_META_IO_ERROR
);
1581 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
|XFS_TRANS_ABORT
);
1584 * Credit the quota account(s). The inode is gone.
1586 XFS_TRANS_MOD_DQUOT_BYINO(mp
, tp
, ip
, XFS_TRANS_DQ_ICOUNT
, -1);
1589 * Just ignore errors at this point. There is nothing we can
1590 * do except to try to keep going. Make sure it's not a silent
1593 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
1595 xfs_fs_cmn_err(CE_NOTE
, mp
, "xfs_inactive: "
1596 "xfs_bmap_finish() returned error %d", error
);
1597 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
1599 xfs_fs_cmn_err(CE_NOTE
, mp
, "xfs_inactive: "
1600 "xfs_trans_commit() returned error %d", error
);
1603 * Release the dquots held by inode, if any.
1605 XFS_QM_DQDETACH(mp
, ip
);
1607 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1610 return VN_INACTIVE_CACHE
;
1617 struct xfs_name
*name
,
1624 xfs_itrace_entry(dp
);
1626 if (XFS_FORCED_SHUTDOWN(dp
->i_mount
))
1627 return XFS_ERROR(EIO
);
1629 lock_mode
= xfs_ilock_map_shared(dp
);
1630 error
= xfs_dir_lookup(NULL
, dp
, name
, &inum
);
1631 xfs_iunlock_map_shared(dp
, lock_mode
);
1636 error
= xfs_iget(dp
->i_mount
, NULL
, inum
, 0, 0, ipp
, 0);
1640 xfs_itrace_ref(*ipp
);
1651 struct xfs_name
*name
,
1657 xfs_mount_t
*mp
= dp
->i_mount
;
1661 xfs_bmap_free_t free_list
;
1662 xfs_fsblock_t first_block
;
1663 boolean_t unlock_dp_on_error
= B_FALSE
;
1664 int dm_event_sent
= 0;
1668 struct xfs_dquot
*udqp
, *gdqp
;
1672 xfs_itrace_entry(dp
);
1674 if (DM_EVENT_ENABLED(dp
, DM_EVENT_CREATE
)) {
1675 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
1676 dp
, DM_RIGHT_NULL
, NULL
,
1677 DM_RIGHT_NULL
, name
->name
, NULL
,
1685 if (XFS_FORCED_SHUTDOWN(mp
))
1686 return XFS_ERROR(EIO
);
1688 /* Return through std_return after this point. */
1691 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
1692 prid
= dp
->i_d
.di_projid
;
1694 prid
= (xfs_prid_t
)dfltprid
;
1697 * Make sure that we have allocated dquot(s) on disk.
1699 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
1700 current_fsuid(credp
), current_fsgid(credp
), prid
,
1701 XFS_QMOPT_QUOTALL
|XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
1707 tp
= xfs_trans_alloc(mp
, XFS_TRANS_CREATE
);
1708 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
1709 resblks
= XFS_CREATE_SPACE_RES(mp
, name
->len
);
1711 * Initially assume that the file does not exist and
1712 * reserve the resources for that case. If that is not
1713 * the case we'll drop the one we have and get a more
1714 * appropriate transaction later.
1716 error
= xfs_trans_reserve(tp
, resblks
, XFS_CREATE_LOG_RES(mp
), 0,
1717 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1718 if (error
== ENOSPC
) {
1720 error
= xfs_trans_reserve(tp
, 0, XFS_CREATE_LOG_RES(mp
), 0,
1721 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1728 xfs_ilock(dp
, XFS_ILOCK_EXCL
| XFS_ILOCK_PARENT
);
1729 unlock_dp_on_error
= B_TRUE
;
1731 XFS_BMAP_INIT(&free_list
, &first_block
);
1736 * Reserve disk quota and the inode.
1738 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
1742 error
= xfs_dir_canenter(tp
, dp
, name
, resblks
);
1745 error
= xfs_dir_ialloc(&tp
, dp
, mode
, 1,
1746 rdev
, credp
, prid
, resblks
> 0,
1749 if (error
== ENOSPC
)
1756 * At this point, we've gotten a newly allocated inode.
1757 * It is locked (and joined to the transaction).
1760 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
1763 * Now we join the directory inode to the transaction. We do not do it
1764 * earlier because xfs_dir_ialloc might commit the previous transaction
1765 * (and release all the locks). An error from here on will result in
1766 * the transaction cancel unlocking dp so don't do it explicitly in the
1770 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
1771 unlock_dp_on_error
= B_FALSE
;
1773 error
= xfs_dir_createname(tp
, dp
, name
, ip
->i_ino
,
1774 &first_block
, &free_list
, resblks
?
1775 resblks
- XFS_IALLOC_SPACE_RES(mp
) : 0);
1777 ASSERT(error
!= ENOSPC
);
1780 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
1781 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
1784 * If this is a synchronous mount, make sure that the
1785 * create transaction goes to disk before returning to
1788 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
1789 xfs_trans_set_sync(tp
);
1795 * Attach the dquot(s) to the inodes and modify them incore.
1796 * These ids of the inode couldn't have changed since the new
1797 * inode has been locked ever since it was created.
1799 XFS_QM_DQVOPCREATE(mp
, tp
, ip
, udqp
, gdqp
);
1802 * xfs_trans_commit normally decrements the vnode ref count
1803 * when it unlocks the inode. Since we want to return the
1804 * vnode to the caller, we bump the vnode ref count now.
1808 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
1810 xfs_bmap_cancel(&free_list
);
1814 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
1821 XFS_QM_DQRELE(mp
, udqp
);
1822 XFS_QM_DQRELE(mp
, gdqp
);
1826 /* Fallthrough to std_return with error = 0 */
1829 if ((*ipp
|| (error
!= 0 && dm_event_sent
!= 0)) &&
1830 DM_EVENT_ENABLED(dp
, DM_EVENT_POSTCREATE
)) {
1831 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTCREATE
,
1834 DM_RIGHT_NULL
, name
->name
, NULL
,
1840 cancel_flags
|= XFS_TRANS_ABORT
;
1845 xfs_trans_cancel(tp
, cancel_flags
);
1847 XFS_QM_DQRELE(mp
, udqp
);
1848 XFS_QM_DQRELE(mp
, gdqp
);
1850 if (unlock_dp_on_error
)
1851 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
1857 * Wait until after the current transaction is aborted to
1858 * release the inode. This prevents recursive transactions
1859 * and deadlocks from xfs_inactive.
1861 cancel_flags
|= XFS_TRANS_ABORT
;
1862 xfs_trans_cancel(tp
, cancel_flags
);
1865 XFS_QM_DQRELE(mp
, udqp
);
1866 XFS_QM_DQRELE(mp
, gdqp
);
1873 * Some counters to see if (and how often) we are hitting some deadlock
1874 * prevention code paths.
1878 int xfs_rm_lock_delays
;
1879 int xfs_rm_attempts
;
1883 * The following routine will lock the inodes associated with the
1884 * directory and the named entry in the directory. The locks are
1885 * acquired in increasing inode number.
1887 * If the entry is "..", then only the directory is locked. The
1888 * vnode ref count will still include that from the .. entry in
1891 * There is a deadlock we need to worry about. If the locked directory is
1892 * in the AIL, it might be blocking up the log. The next inode we lock
1893 * could be already locked by another thread waiting for log space (e.g
1894 * a permanent log reservation with a long running transaction (see
1895 * xfs_itruncate_finish)). To solve this, we must check if the directory
1896 * is in the ail and use lock_nowait. If we can't lock, we need to
1897 * drop the inode lock on the directory and try again. xfs_iunlock will
1898 * potentially push the tail if we were holding up the log.
1901 xfs_lock_dir_and_entry(
1903 xfs_inode_t
*ip
) /* inode of entry 'name' */
1907 xfs_inode_t
*ips
[2];
1916 xfs_ilock(dp
, XFS_ILOCK_EXCL
| XFS_ILOCK_PARENT
);
1923 * We want to lock in increasing inum. Since we've already
1924 * acquired the lock on the directory, we may need to release
1925 * if if the inum of the entry turns out to be less.
1927 if (e_inum
> dp
->i_ino
) {
1929 * We are already in the right order, so just
1930 * lock on the inode of the entry.
1931 * We need to use nowait if dp is in the AIL.
1934 lp
= (xfs_log_item_t
*)dp
->i_itemp
;
1935 if (lp
&& (lp
->li_flags
& XFS_LI_IN_AIL
)) {
1936 if (!xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
)) {
1943 * Unlock dp and try again.
1944 * xfs_iunlock will try to push the tail
1945 * if the inode is in the AIL.
1948 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
1950 if ((attempts
% 5) == 0) {
1951 delay(1); /* Don't just spin the CPU */
1953 xfs_rm_lock_delays
++;
1959 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1961 } else if (e_inum
< dp
->i_ino
) {
1962 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
1966 xfs_lock_inodes(ips
, 2, XFS_ILOCK_EXCL
);
1968 /* else e_inum == dp->i_ino */
1969 /* This can happen if we're asked to lock /x/..
1970 * the entry is "..", which is also the parent directory.
1978 int xfs_small_retries
;
1979 int xfs_middle_retries
;
1980 int xfs_lots_retries
;
1981 int xfs_lock_delays
;
1985 * Bump the subclass so xfs_lock_inodes() acquires each lock with
1989 xfs_lock_inumorder(int lock_mode
, int subclass
)
1991 if (lock_mode
& (XFS_IOLOCK_SHARED
|XFS_IOLOCK_EXCL
))
1992 lock_mode
|= (subclass
+ XFS_LOCK_INUMORDER
) << XFS_IOLOCK_SHIFT
;
1993 if (lock_mode
& (XFS_ILOCK_SHARED
|XFS_ILOCK_EXCL
))
1994 lock_mode
|= (subclass
+ XFS_LOCK_INUMORDER
) << XFS_ILOCK_SHIFT
;
2000 * The following routine will lock n inodes in exclusive mode.
2001 * We assume the caller calls us with the inodes in i_ino order.
2003 * We need to detect deadlock where an inode that we lock
2004 * is in the AIL and we start waiting for another inode that is locked
2005 * by a thread in a long running transaction (such as truncate). This can
2006 * result in deadlock since the long running trans might need to wait
2007 * for the inode we just locked in order to push the tail and free space
2016 int attempts
= 0, i
, j
, try_lock
;
2019 ASSERT(ips
&& (inodes
>= 2)); /* we need at least two */
2025 for (; i
< inodes
; i
++) {
2028 if (i
&& (ips
[i
] == ips
[i
-1])) /* Already locked */
2032 * If try_lock is not set yet, make sure all locked inodes
2033 * are not in the AIL.
2034 * If any are, set try_lock to be used later.
2038 for (j
= (i
- 1); j
>= 0 && !try_lock
; j
--) {
2039 lp
= (xfs_log_item_t
*)ips
[j
]->i_itemp
;
2040 if (lp
&& (lp
->li_flags
& XFS_LI_IN_AIL
)) {
2047 * If any of the previous locks we have locked is in the AIL,
2048 * we must TRY to get the second and subsequent locks. If
2049 * we can't get any, we must release all we have
2054 /* try_lock must be 0 if i is 0. */
2056 * try_lock means we have an inode locked
2057 * that is in the AIL.
2060 if (!xfs_ilock_nowait(ips
[i
], xfs_lock_inumorder(lock_mode
, i
))) {
2064 * Unlock all previous guys and try again.
2065 * xfs_iunlock will try to push the tail
2066 * if the inode is in the AIL.
2069 for(j
= i
- 1; j
>= 0; j
--) {
2072 * Check to see if we've already
2073 * unlocked this one.
2074 * Not the first one going back,
2075 * and the inode ptr is the same.
2077 if ((j
!= (i
- 1)) && ips
[j
] ==
2081 xfs_iunlock(ips
[j
], lock_mode
);
2084 if ((attempts
% 5) == 0) {
2085 delay(1); /* Don't just spin the CPU */
2095 xfs_ilock(ips
[i
], xfs_lock_inumorder(lock_mode
, i
));
2101 if (attempts
< 5) xfs_small_retries
++;
2102 else if (attempts
< 100) xfs_middle_retries
++;
2103 else xfs_lots_retries
++;
2111 #define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);}
2112 int remove_which_error_return
= 0;
2114 #define REMOVE_DEBUG_TRACE(x)
2115 #endif /* ! DEBUG */
2120 struct xfs_name
*name
,
2123 xfs_mount_t
*mp
= dp
->i_mount
;
2124 xfs_trans_t
*tp
= NULL
;
2126 xfs_bmap_free_t free_list
;
2127 xfs_fsblock_t first_block
;
2133 xfs_itrace_entry(dp
);
2135 if (XFS_FORCED_SHUTDOWN(mp
))
2136 return XFS_ERROR(EIO
);
2138 if (DM_EVENT_ENABLED(dp
, DM_EVENT_REMOVE
)) {
2139 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_REMOVE
, dp
, DM_RIGHT_NULL
,
2140 NULL
, DM_RIGHT_NULL
, name
->name
, NULL
,
2141 ip
->i_d
.di_mode
, 0, 0);
2146 xfs_itrace_entry(ip
);
2149 error
= XFS_QM_DQATTACH(mp
, dp
, 0);
2151 error
= XFS_QM_DQATTACH(mp
, ip
, 0);
2153 REMOVE_DEBUG_TRACE(__LINE__
);
2157 tp
= xfs_trans_alloc(mp
, XFS_TRANS_REMOVE
);
2158 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2160 * We try to get the real space reservation first,
2161 * allowing for directory btree deletion(s) implying
2162 * possible bmap insert(s). If we can't get the space
2163 * reservation then we use 0 instead, and avoid the bmap
2164 * btree insert(s) in the directory code by, if the bmap
2165 * insert tries to happen, instead trimming the LAST
2166 * block from the directory.
2168 resblks
= XFS_REMOVE_SPACE_RES(mp
);
2169 error
= xfs_trans_reserve(tp
, resblks
, XFS_REMOVE_LOG_RES(mp
), 0,
2170 XFS_TRANS_PERM_LOG_RES
, XFS_REMOVE_LOG_COUNT
);
2171 if (error
== ENOSPC
) {
2173 error
= xfs_trans_reserve(tp
, 0, XFS_REMOVE_LOG_RES(mp
), 0,
2174 XFS_TRANS_PERM_LOG_RES
, XFS_REMOVE_LOG_COUNT
);
2177 ASSERT(error
!= ENOSPC
);
2178 REMOVE_DEBUG_TRACE(__LINE__
);
2179 xfs_trans_cancel(tp
, 0);
2183 error
= xfs_lock_dir_and_entry(dp
, ip
);
2185 REMOVE_DEBUG_TRACE(__LINE__
);
2186 xfs_trans_cancel(tp
, cancel_flags
);
2191 * At this point, we've gotten both the directory and the entry
2195 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2198 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
2201 * Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
2203 XFS_BMAP_INIT(&free_list
, &first_block
);
2204 error
= xfs_dir_removename(tp
, dp
, name
, ip
->i_ino
,
2205 &first_block
, &free_list
, resblks
);
2207 ASSERT(error
!= ENOENT
);
2208 REMOVE_DEBUG_TRACE(__LINE__
);
2211 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2214 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
2216 error
= xfs_droplink(tp
, ip
);
2218 REMOVE_DEBUG_TRACE(__LINE__
);
2222 /* Determine if this is the last link while
2223 * we are in the transaction.
2225 link_zero
= (ip
)->i_d
.di_nlink
==0;
2228 * If this is a synchronous mount, make sure that the
2229 * remove transaction goes to disk before returning to
2232 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2233 xfs_trans_set_sync(tp
);
2236 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
2238 REMOVE_DEBUG_TRACE(__LINE__
);
2242 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
2247 * If we are using filestreams, kill the stream association.
2248 * If the file is still open it may get a new one but that
2249 * will get killed on last close in xfs_close() so we don't
2250 * have to worry about that.
2252 if (link_zero
&& xfs_inode_is_filestream(ip
))
2253 xfs_filestream_deassociate(ip
);
2255 xfs_itrace_exit(ip
);
2257 /* Fall through to std_return with error = 0 */
2259 if (DM_EVENT_ENABLED(dp
, DM_EVENT_POSTREMOVE
)) {
2260 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTREMOVE
,
2262 NULL
, DM_RIGHT_NULL
,
2263 name
->name
, NULL
, ip
->i_d
.di_mode
, error
, 0);
2268 xfs_bmap_cancel(&free_list
);
2269 cancel_flags
|= XFS_TRANS_ABORT
;
2270 xfs_trans_cancel(tp
, cancel_flags
);
2275 * In this case make sure to not release the inode until after
2276 * the current transaction is aborted. Releasing it beforehand
2277 * can cause us to go to xfs_inactive and start a recursive
2278 * transaction which can easily deadlock with the current one.
2280 xfs_bmap_cancel(&free_list
);
2281 cancel_flags
|= XFS_TRANS_ABORT
;
2282 xfs_trans_cancel(tp
, cancel_flags
);
2291 struct xfs_name
*target_name
)
2293 xfs_mount_t
*mp
= tdp
->i_mount
;
2295 xfs_inode_t
*ips
[2];
2297 xfs_bmap_free_t free_list
;
2298 xfs_fsblock_t first_block
;
2303 xfs_itrace_entry(tdp
);
2304 xfs_itrace_entry(sip
);
2306 ASSERT(!S_ISDIR(sip
->i_d
.di_mode
));
2308 if (XFS_FORCED_SHUTDOWN(mp
))
2309 return XFS_ERROR(EIO
);
2311 if (DM_EVENT_ENABLED(tdp
, DM_EVENT_LINK
)) {
2312 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_LINK
,
2315 target_name
->name
, NULL
, 0, 0, 0);
2320 /* Return through std_return after this point. */
2322 error
= XFS_QM_DQATTACH(mp
, sip
, 0);
2323 if (!error
&& sip
!= tdp
)
2324 error
= XFS_QM_DQATTACH(mp
, tdp
, 0);
2328 tp
= xfs_trans_alloc(mp
, XFS_TRANS_LINK
);
2329 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2330 resblks
= XFS_LINK_SPACE_RES(mp
, target_name
->len
);
2331 error
= xfs_trans_reserve(tp
, resblks
, XFS_LINK_LOG_RES(mp
), 0,
2332 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2333 if (error
== ENOSPC
) {
2335 error
= xfs_trans_reserve(tp
, 0, XFS_LINK_LOG_RES(mp
), 0,
2336 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2343 if (sip
->i_ino
< tdp
->i_ino
) {
2351 xfs_lock_inodes(ips
, 2, XFS_ILOCK_EXCL
);
2354 * Increment vnode ref counts since xfs_trans_commit &
2355 * xfs_trans_cancel will both unlock the inodes and
2356 * decrement the associated ref counts.
2360 xfs_trans_ijoin(tp
, sip
, XFS_ILOCK_EXCL
);
2361 xfs_trans_ijoin(tp
, tdp
, XFS_ILOCK_EXCL
);
2364 * If the source has too many links, we can't make any more to it.
2366 if (sip
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2367 error
= XFS_ERROR(EMLINK
);
2372 * If we are using project inheritance, we only allow hard link
2373 * creation in our tree when the project IDs are the same; else
2374 * the tree quota mechanism could be circumvented.
2376 if (unlikely((tdp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) &&
2377 (tdp
->i_d
.di_projid
!= sip
->i_d
.di_projid
))) {
2378 error
= XFS_ERROR(EXDEV
);
2382 error
= xfs_dir_canenter(tp
, tdp
, target_name
, resblks
);
2386 XFS_BMAP_INIT(&free_list
, &first_block
);
2388 error
= xfs_dir_createname(tp
, tdp
, target_name
, sip
->i_ino
,
2389 &first_block
, &free_list
, resblks
);
2392 xfs_ichgtime(tdp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2394 xfs_trans_log_inode(tp
, tdp
, XFS_ILOG_CORE
);
2396 error
= xfs_bumplink(tp
, sip
);
2401 * If this is a synchronous mount, make sure that the
2402 * link transaction goes to disk before returning to
2405 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2406 xfs_trans_set_sync(tp
);
2409 error
= xfs_bmap_finish (&tp
, &free_list
, &committed
);
2411 xfs_bmap_cancel(&free_list
);
2415 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
2419 /* Fall through to std_return with error = 0. */
2421 if (DM_EVENT_ENABLED(sip
, DM_EVENT_POSTLINK
)) {
2422 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTLINK
,
2425 target_name
->name
, NULL
, 0, error
, 0);
2430 cancel_flags
|= XFS_TRANS_ABORT
;
2434 xfs_trans_cancel(tp
, cancel_flags
);
2442 struct xfs_name
*dir_name
,
2447 xfs_mount_t
*mp
= dp
->i_mount
;
2448 xfs_inode_t
*cdp
; /* inode of created dir */
2453 xfs_bmap_free_t free_list
;
2454 xfs_fsblock_t first_block
;
2455 boolean_t unlock_dp_on_error
= B_FALSE
;
2456 boolean_t created
= B_FALSE
;
2457 int dm_event_sent
= 0;
2459 struct xfs_dquot
*udqp
, *gdqp
;
2462 if (XFS_FORCED_SHUTDOWN(mp
))
2463 return XFS_ERROR(EIO
);
2467 if (DM_EVENT_ENABLED(dp
, DM_EVENT_CREATE
)) {
2468 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
2469 dp
, DM_RIGHT_NULL
, NULL
,
2470 DM_RIGHT_NULL
, dir_name
->name
, NULL
,
2477 /* Return through std_return after this point. */
2479 xfs_itrace_entry(dp
);
2483 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
2484 prid
= dp
->i_d
.di_projid
;
2486 prid
= (xfs_prid_t
)dfltprid
;
2489 * Make sure that we have allocated dquot(s) on disk.
2491 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
2492 current_fsuid(credp
), current_fsgid(credp
), prid
,
2493 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
2497 tp
= xfs_trans_alloc(mp
, XFS_TRANS_MKDIR
);
2498 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2499 resblks
= XFS_MKDIR_SPACE_RES(mp
, dir_name
->len
);
2500 error
= xfs_trans_reserve(tp
, resblks
, XFS_MKDIR_LOG_RES(mp
), 0,
2501 XFS_TRANS_PERM_LOG_RES
, XFS_MKDIR_LOG_COUNT
);
2502 if (error
== ENOSPC
) {
2504 error
= xfs_trans_reserve(tp
, 0, XFS_MKDIR_LOG_RES(mp
), 0,
2505 XFS_TRANS_PERM_LOG_RES
,
2506 XFS_MKDIR_LOG_COUNT
);
2513 xfs_ilock(dp
, XFS_ILOCK_EXCL
| XFS_ILOCK_PARENT
);
2514 unlock_dp_on_error
= B_TRUE
;
2517 * Check for directory link count overflow.
2519 if (dp
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2520 error
= XFS_ERROR(EMLINK
);
2525 * Reserve disk quota and the inode.
2527 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
2531 error
= xfs_dir_canenter(tp
, dp
, dir_name
, resblks
);
2535 * create the directory inode.
2537 error
= xfs_dir_ialloc(&tp
, dp
, mode
, 2,
2538 0, credp
, prid
, resblks
> 0,
2541 if (error
== ENOSPC
)
2545 xfs_itrace_ref(cdp
);
2548 * Now we add the directory inode to the transaction.
2549 * We waited until now since xfs_dir_ialloc might start
2550 * a new transaction. Had we joined the transaction
2551 * earlier, the locks might have gotten released. An error
2552 * from here on will result in the transaction cancel
2553 * unlocking dp so don't do it explicitly in the error path.
2556 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2557 unlock_dp_on_error
= B_FALSE
;
2559 XFS_BMAP_INIT(&free_list
, &first_block
);
2561 error
= xfs_dir_createname(tp
, dp
, dir_name
, cdp
->i_ino
,
2562 &first_block
, &free_list
, resblks
?
2563 resblks
- XFS_IALLOC_SPACE_RES(mp
) : 0);
2565 ASSERT(error
!= ENOSPC
);
2568 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2571 * Bump the in memory version number of the parent directory
2572 * so that other processes accessing it will recognize that
2573 * the directory has changed.
2577 error
= xfs_dir_init(tp
, cdp
, dp
);
2582 error
= xfs_bumplink(tp
, dp
);
2592 * Attach the dquots to the new inode and modify the icount incore.
2594 XFS_QM_DQVOPCREATE(mp
, tp
, cdp
, udqp
, gdqp
);
2597 * If this is a synchronous mount, make sure that the
2598 * mkdir transaction goes to disk before returning to
2601 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2602 xfs_trans_set_sync(tp
);
2605 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
2611 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
2612 XFS_QM_DQRELE(mp
, udqp
);
2613 XFS_QM_DQRELE(mp
, gdqp
);
2618 /* Fall through to std_return with error = 0 or errno from
2619 * xfs_trans_commit. */
2622 if ((created
|| (error
!= 0 && dm_event_sent
!= 0)) &&
2623 DM_EVENT_ENABLED(dp
, DM_EVENT_POSTCREATE
)) {
2624 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTCREATE
,
2626 created
? cdp
: NULL
,
2628 dir_name
->name
, NULL
,
2635 xfs_bmap_cancel(&free_list
);
2637 cancel_flags
|= XFS_TRANS_ABORT
;
2639 xfs_trans_cancel(tp
, cancel_flags
);
2640 XFS_QM_DQRELE(mp
, udqp
);
2641 XFS_QM_DQRELE(mp
, gdqp
);
2643 if (unlock_dp_on_error
)
2644 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2652 struct xfs_name
*name
,
2655 xfs_mount_t
*mp
= dp
->i_mount
;
2658 xfs_bmap_free_t free_list
;
2659 xfs_fsblock_t first_block
;
2665 xfs_itrace_entry(dp
);
2667 if (XFS_FORCED_SHUTDOWN(mp
))
2668 return XFS_ERROR(EIO
);
2670 if (DM_EVENT_ENABLED(dp
, DM_EVENT_REMOVE
)) {
2671 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_REMOVE
,
2673 NULL
, DM_RIGHT_NULL
, name
->name
,
2674 NULL
, cdp
->i_d
.di_mode
, 0, 0);
2676 return XFS_ERROR(error
);
2680 * Get the dquots for the inodes.
2682 error
= XFS_QM_DQATTACH(mp
, dp
, 0);
2684 error
= XFS_QM_DQATTACH(mp
, cdp
, 0);
2686 REMOVE_DEBUG_TRACE(__LINE__
);
2690 tp
= xfs_trans_alloc(mp
, XFS_TRANS_RMDIR
);
2691 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2693 * We try to get the real space reservation first,
2694 * allowing for directory btree deletion(s) implying
2695 * possible bmap insert(s). If we can't get the space
2696 * reservation then we use 0 instead, and avoid the bmap
2697 * btree insert(s) in the directory code by, if the bmap
2698 * insert tries to happen, instead trimming the LAST
2699 * block from the directory.
2701 resblks
= XFS_REMOVE_SPACE_RES(mp
);
2702 error
= xfs_trans_reserve(tp
, resblks
, XFS_REMOVE_LOG_RES(mp
), 0,
2703 XFS_TRANS_PERM_LOG_RES
, XFS_DEFAULT_LOG_COUNT
);
2704 if (error
== ENOSPC
) {
2706 error
= xfs_trans_reserve(tp
, 0, XFS_REMOVE_LOG_RES(mp
), 0,
2707 XFS_TRANS_PERM_LOG_RES
, XFS_DEFAULT_LOG_COUNT
);
2710 ASSERT(error
!= ENOSPC
);
2714 XFS_BMAP_INIT(&free_list
, &first_block
);
2717 * Now lock the child directory inode and the parent directory
2718 * inode in the proper order. This will take care of validating
2719 * that the directory entry for the child directory inode has
2720 * not changed while we were obtaining a log reservation.
2722 error
= xfs_lock_dir_and_entry(dp
, cdp
);
2724 xfs_trans_cancel(tp
, cancel_flags
);
2729 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2732 xfs_trans_ijoin(tp
, cdp
, XFS_ILOCK_EXCL
);
2734 ASSERT(cdp
->i_d
.di_nlink
>= 2);
2735 if (cdp
->i_d
.di_nlink
!= 2) {
2736 error
= XFS_ERROR(ENOTEMPTY
);
2739 if (!xfs_dir_isempty(cdp
)) {
2740 error
= XFS_ERROR(ENOTEMPTY
);
2744 error
= xfs_dir_removename(tp
, dp
, name
, cdp
->i_ino
,
2745 &first_block
, &free_list
, resblks
);
2749 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2752 * Bump the in memory generation count on the parent
2753 * directory so that other can know that it has changed.
2758 * Drop the link from cdp's "..".
2760 error
= xfs_droplink(tp
, dp
);
2766 * Drop the link from dp to cdp.
2768 error
= xfs_droplink(tp
, cdp
);
2774 * Drop the "." link from cdp to self.
2776 error
= xfs_droplink(tp
, cdp
);
2781 /* Determine these before committing transaction */
2782 last_cdp_link
= (cdp
)->i_d
.di_nlink
==0;
2785 * If this is a synchronous mount, make sure that the
2786 * rmdir transaction goes to disk before returning to
2789 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2790 xfs_trans_set_sync(tp
);
2793 error
= xfs_bmap_finish (&tp
, &free_list
, &committed
);
2795 xfs_bmap_cancel(&free_list
);
2796 xfs_trans_cancel(tp
, (XFS_TRANS_RELEASE_LOG_RES
|
2801 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
2807 /* Fall through to std_return with error = 0 or the errno
2808 * from xfs_trans_commit. */
2810 if (DM_EVENT_ENABLED(dp
, DM_EVENT_POSTREMOVE
)) {
2811 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTREMOVE
,
2813 NULL
, DM_RIGHT_NULL
,
2814 name
->name
, NULL
, cdp
->i_d
.di_mode
,
2820 xfs_bmap_cancel(&free_list
);
2821 cancel_flags
|= XFS_TRANS_ABORT
;
2825 xfs_trans_cancel(tp
, cancel_flags
);
2832 struct xfs_name
*link_name
,
2833 const char *target_path
,
2838 xfs_mount_t
*mp
= dp
->i_mount
;
2843 xfs_bmap_free_t free_list
;
2844 xfs_fsblock_t first_block
;
2845 boolean_t unlock_dp_on_error
= B_FALSE
;
2848 xfs_fileoff_t first_fsb
;
2849 xfs_filblks_t fs_blocks
;
2851 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
2853 const char *cur_chunk
;
2858 struct xfs_dquot
*udqp
, *gdqp
;
2866 xfs_itrace_entry(dp
);
2868 if (XFS_FORCED_SHUTDOWN(mp
))
2869 return XFS_ERROR(EIO
);
2872 * Check component lengths of the target path name.
2874 pathlen
= strlen(target_path
);
2875 if (pathlen
>= MAXPATHLEN
) /* total string too long */
2876 return XFS_ERROR(ENAMETOOLONG
);
2878 if (DM_EVENT_ENABLED(dp
, DM_EVENT_SYMLINK
)) {
2879 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_SYMLINK
, dp
,
2880 DM_RIGHT_NULL
, NULL
, DM_RIGHT_NULL
,
2881 link_name
->name
, target_path
, 0, 0, 0);
2886 /* Return through std_return after this point. */
2889 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
2890 prid
= dp
->i_d
.di_projid
;
2892 prid
= (xfs_prid_t
)dfltprid
;
2895 * Make sure that we have allocated dquot(s) on disk.
2897 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
2898 current_fsuid(credp
), current_fsgid(credp
), prid
,
2899 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
2903 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SYMLINK
);
2904 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2906 * The symlink will fit into the inode data fork?
2907 * There can't be any attributes so we get the whole variable part.
2909 if (pathlen
<= XFS_LITINO(mp
))
2912 fs_blocks
= XFS_B_TO_FSB(mp
, pathlen
);
2913 resblks
= XFS_SYMLINK_SPACE_RES(mp
, link_name
->len
, fs_blocks
);
2914 error
= xfs_trans_reserve(tp
, resblks
, XFS_SYMLINK_LOG_RES(mp
), 0,
2915 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
2916 if (error
== ENOSPC
&& fs_blocks
== 0) {
2918 error
= xfs_trans_reserve(tp
, 0, XFS_SYMLINK_LOG_RES(mp
), 0,
2919 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
2926 xfs_ilock(dp
, XFS_ILOCK_EXCL
| XFS_ILOCK_PARENT
);
2927 unlock_dp_on_error
= B_TRUE
;
2930 * Check whether the directory allows new symlinks or not.
2932 if (dp
->i_d
.di_flags
& XFS_DIFLAG_NOSYMLINKS
) {
2933 error
= XFS_ERROR(EPERM
);
2938 * Reserve disk quota : blocks and inode.
2940 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
2945 * Check for ability to enter directory entry, if no space reserved.
2947 error
= xfs_dir_canenter(tp
, dp
, link_name
, resblks
);
2951 * Initialize the bmap freelist prior to calling either
2952 * bmapi or the directory create code.
2954 XFS_BMAP_INIT(&free_list
, &first_block
);
2957 * Allocate an inode for the symlink.
2959 error
= xfs_dir_ialloc(&tp
, dp
, S_IFLNK
| (mode
& ~S_IFMT
),
2960 1, 0, credp
, prid
, resblks
> 0, &ip
, NULL
);
2962 if (error
== ENOSPC
)
2969 * An error after we've joined dp to the transaction will result in the
2970 * transaction cancel unlocking dp so don't do it explicitly in the
2974 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2975 unlock_dp_on_error
= B_FALSE
;
2978 * Also attach the dquot(s) to it, if applicable.
2980 XFS_QM_DQVOPCREATE(mp
, tp
, ip
, udqp
, gdqp
);
2983 resblks
-= XFS_IALLOC_SPACE_RES(mp
);
2985 * If the symlink will fit into the inode, write it inline.
2987 if (pathlen
<= XFS_IFORK_DSIZE(ip
)) {
2988 xfs_idata_realloc(ip
, pathlen
, XFS_DATA_FORK
);
2989 memcpy(ip
->i_df
.if_u1
.if_data
, target_path
, pathlen
);
2990 ip
->i_d
.di_size
= pathlen
;
2993 * The inode was initially created in extent format.
2995 ip
->i_df
.if_flags
&= ~(XFS_IFEXTENTS
| XFS_IFBROOT
);
2996 ip
->i_df
.if_flags
|= XFS_IFINLINE
;
2998 ip
->i_d
.di_format
= XFS_DINODE_FMT_LOCAL
;
2999 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_DDATA
| XFS_ILOG_CORE
);
3003 nmaps
= SYMLINK_MAPS
;
3005 error
= xfs_bmapi(tp
, ip
, first_fsb
, fs_blocks
,
3006 XFS_BMAPI_WRITE
| XFS_BMAPI_METADATA
,
3007 &first_block
, resblks
, mval
, &nmaps
,
3014 resblks
-= fs_blocks
;
3015 ip
->i_d
.di_size
= pathlen
;
3016 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
3018 cur_chunk
= target_path
;
3019 for (n
= 0; n
< nmaps
; n
++) {
3020 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
3021 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
3022 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
, d
,
3023 BTOBB(byte_cnt
), 0);
3024 ASSERT(bp
&& !XFS_BUF_GETERROR(bp
));
3025 if (pathlen
< byte_cnt
) {
3028 pathlen
-= byte_cnt
;
3030 memcpy(XFS_BUF_PTR(bp
), cur_chunk
, byte_cnt
);
3031 cur_chunk
+= byte_cnt
;
3033 xfs_trans_log_buf(tp
, bp
, 0, byte_cnt
- 1);
3038 * Create the directory entry for the symlink.
3040 error
= xfs_dir_createname(tp
, dp
, link_name
, ip
->i_ino
,
3041 &first_block
, &free_list
, resblks
);
3044 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
3045 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
3048 * Bump the in memory version number of the parent directory
3049 * so that other processes accessing it will recognize that
3050 * the directory has changed.
3055 * If this is a synchronous mount, make sure that the
3056 * symlink transaction goes to disk before returning to
3059 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
3060 xfs_trans_set_sync(tp
);
3064 * xfs_trans_commit normally decrements the vnode ref count
3065 * when it unlocks the inode. Since we want to return the
3066 * vnode to the caller, we bump the vnode ref count now.
3070 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
3074 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
3075 XFS_QM_DQRELE(mp
, udqp
);
3076 XFS_QM_DQRELE(mp
, gdqp
);
3078 /* Fall through to std_return with error = 0 or errno from
3079 * xfs_trans_commit */
3081 if (DM_EVENT_ENABLED(dp
, DM_EVENT_POSTSYMLINK
)) {
3082 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTSYMLINK
,
3085 DM_RIGHT_NULL
, link_name
->name
,
3086 target_path
, 0, error
, 0);
3096 xfs_bmap_cancel(&free_list
);
3097 cancel_flags
|= XFS_TRANS_ABORT
;
3099 xfs_trans_cancel(tp
, cancel_flags
);
3100 XFS_QM_DQRELE(mp
, udqp
);
3101 XFS_QM_DQRELE(mp
, gdqp
);
3103 if (unlock_dp_on_error
)
3104 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
3114 xfs_mount_t
*mp
= ip
->i_mount
;
3117 if (XFS_FORCED_SHUTDOWN(mp
))
3118 return XFS_ERROR(EIO
);
3121 * Bypass inodes which have already been cleaned by
3122 * the inode flush clustering code inside xfs_iflush
3124 if (xfs_inode_clean(ip
))
3128 * We make this non-blocking if the inode is contended,
3129 * return EAGAIN to indicate to the caller that they
3130 * did not succeed. This prevents the flush path from
3131 * blocking on inodes inside another operation right
3132 * now, they get caught later by xfs_sync.
3134 if (flags
& FLUSH_SYNC
) {
3135 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
3137 } else if (xfs_ilock_nowait(ip
, XFS_ILOCK_SHARED
)) {
3138 if (xfs_ipincount(ip
) || !xfs_iflock_nowait(ip
)) {
3139 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
3146 error
= xfs_iflush(ip
, (flags
& FLUSH_SYNC
) ? XFS_IFLUSH_SYNC
3147 : XFS_IFLUSH_ASYNC_NOBLOCK
);
3148 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
3160 xfs_mount_t
*mp
= ip
->i_mount
;
3164 if (!capable(CAP_SYS_ADMIN
))
3165 return XFS_ERROR(EPERM
);
3167 if (XFS_FORCED_SHUTDOWN(mp
))
3168 return XFS_ERROR(EIO
);
3170 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SET_DMATTRS
);
3171 error
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES (mp
), 0, 0, 0);
3173 xfs_trans_cancel(tp
, 0);
3176 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3177 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3179 ip
->i_d
.di_dmevmask
= evmask
;
3180 ip
->i_d
.di_dmstate
= state
;
3182 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
3184 error
= xfs_trans_commit(tp
, 0);
3193 bhv_vnode_t
*vp
= XFS_ITOV(ip
);
3195 xfs_itrace_entry(ip
);
3197 ASSERT(!VN_MAPPED(vp
));
3199 /* bad inode, get out here ASAP */
3207 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
3210 * Make sure the atime in the XFS inode is correct before freeing the
3213 xfs_synchronize_atime(ip
);
3216 * If we have nothing to flush with this inode then complete the
3217 * teardown now, otherwise break the link between the xfs inode and the
3218 * linux inode and clean up the xfs inode later. This avoids flushing
3219 * the inode to disk during the delete operation itself.
3221 * When breaking the link, we need to set the XFS_IRECLAIMABLE flag
3222 * first to ensure that xfs_iunpin() will never see an xfs inode
3223 * that has a linux inode being reclaimed. Synchronisation is provided
3224 * by the i_flags_lock.
3226 if (!ip
->i_update_core
&& (ip
->i_itemp
== NULL
)) {
3227 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3229 return xfs_finish_reclaim(ip
, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC
);
3231 xfs_mount_t
*mp
= ip
->i_mount
;
3233 /* Protect sync and unpin from us */
3234 XFS_MOUNT_ILOCK(mp
);
3235 spin_lock(&ip
->i_flags_lock
);
3236 __xfs_iflags_set(ip
, XFS_IRECLAIMABLE
);
3237 vn_to_inode(vp
)->i_private
= NULL
;
3239 spin_unlock(&ip
->i_flags_lock
);
3240 list_add_tail(&ip
->i_reclaim
, &mp
->m_del_inodes
);
3241 XFS_MOUNT_IUNLOCK(mp
);
3252 xfs_perag_t
*pag
= xfs_get_perag(ip
->i_mount
, ip
->i_ino
);
3253 bhv_vnode_t
*vp
= XFS_ITOV_NULL(ip
);
3256 if (vp
&& VN_BAD(vp
))
3259 /* The hash lock here protects a thread in xfs_iget_core from
3260 * racing with us on linking the inode back with a vnode.
3261 * Once we have the XFS_IRECLAIM flag set it will not touch
3264 write_lock(&pag
->pag_ici_lock
);
3265 spin_lock(&ip
->i_flags_lock
);
3266 if (__xfs_iflags_test(ip
, XFS_IRECLAIM
) ||
3267 (!__xfs_iflags_test(ip
, XFS_IRECLAIMABLE
) && vp
== NULL
)) {
3268 spin_unlock(&ip
->i_flags_lock
);
3269 write_unlock(&pag
->pag_ici_lock
);
3272 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3276 __xfs_iflags_set(ip
, XFS_IRECLAIM
);
3277 spin_unlock(&ip
->i_flags_lock
);
3278 write_unlock(&pag
->pag_ici_lock
);
3279 xfs_put_perag(ip
->i_mount
, pag
);
3282 * If the inode is still dirty, then flush it out. If the inode
3283 * is not in the AIL, then it will be OK to flush it delwri as
3284 * long as xfs_iflush() does not keep any references to the inode.
3285 * We leave that decision up to xfs_iflush() since it has the
3286 * knowledge of whether it's OK to simply do a delwri flush of
3287 * the inode or whether we need to wait until the inode is
3288 * pulled from the AIL.
3289 * We get the flush lock regardless, though, just to make sure
3290 * we don't free it while it is being flushed.
3293 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3297 if (!XFS_FORCED_SHUTDOWN(ip
->i_mount
)) {
3298 if (ip
->i_update_core
||
3299 ((ip
->i_itemp
!= NULL
) &&
3300 (ip
->i_itemp
->ili_format
.ilf_fields
!= 0))) {
3301 error
= xfs_iflush(ip
, sync_mode
);
3303 * If we hit an error, typically because of filesystem
3304 * shutdown, we don't need to let vn_reclaim to know
3305 * because we're gonna reclaim the inode anyway.
3308 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3311 xfs_iflock(ip
); /* synchronize with xfs_iflush_done */
3314 ASSERT(ip
->i_update_core
== 0);
3315 ASSERT(ip
->i_itemp
== NULL
||
3316 ip
->i_itemp
->ili_format
.ilf_fields
== 0);
3320 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3328 xfs_finish_reclaim_all(xfs_mount_t
*mp
, int noblock
)
3331 xfs_inode_t
*ip
, *n
;
3336 XFS_MOUNT_ILOCK(mp
);
3337 list_for_each_entry_safe(ip
, n
, &mp
->m_del_inodes
, i_reclaim
) {
3339 if (xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
) == 0)
3341 if (xfs_ipincount(ip
) ||
3342 !xfs_iflock_nowait(ip
)) {
3343 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3347 XFS_MOUNT_IUNLOCK(mp
);
3348 if (xfs_finish_reclaim(ip
, noblock
,
3349 XFS_IFLUSH_DELWRI_ELSE_ASYNC
))
3358 XFS_MOUNT_IUNLOCK(mp
);
3363 * xfs_alloc_file_space()
3364 * This routine allocates disk space for the given file.
3366 * If alloc_type == 0, this request is for an ALLOCSP type
3367 * request which will change the file size. In this case, no
3368 * DMAPI event will be generated by the call. A TRUNCATE event
3369 * will be generated later by xfs_setattr.
3371 * If alloc_type != 0, this request is for a RESVSP type
3372 * request, and a DMAPI DM_EVENT_WRITE will be generated if the
3373 * lower block boundary byte address is less than the file's
3382 xfs_alloc_file_space(
3389 xfs_mount_t
*mp
= ip
->i_mount
;
3391 xfs_filblks_t allocated_fsb
;
3392 xfs_filblks_t allocatesize_fsb
;
3393 xfs_extlen_t extsz
, temp
;
3394 xfs_fileoff_t startoffset_fsb
;
3395 xfs_fsblock_t firstfsb
;
3401 xfs_bmbt_irec_t imaps
[1], *imapp
;
3402 xfs_bmap_free_t free_list
;
3403 uint qblocks
, resblks
, resrtextents
;
3407 xfs_itrace_entry(ip
);
3409 if (XFS_FORCED_SHUTDOWN(mp
))
3410 return XFS_ERROR(EIO
);
3412 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
3416 return XFS_ERROR(EINVAL
);
3418 rt
= XFS_IS_REALTIME_INODE(ip
);
3419 extsz
= xfs_get_extsz_hint(ip
);
3424 bmapi_flag
= XFS_BMAPI_WRITE
| (alloc_type
? XFS_BMAPI_PREALLOC
: 0);
3425 startoffset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
3426 allocatesize_fsb
= XFS_B_TO_FSB(mp
, count
);
3428 /* Generate a DMAPI event if needed. */
3429 if (alloc_type
!= 0 && offset
< ip
->i_size
&&
3430 (attr_flags
&ATTR_DMI
) == 0 &&
3431 DM_EVENT_ENABLED(ip
, DM_EVENT_WRITE
)) {
3432 xfs_off_t end_dmi_offset
;
3434 end_dmi_offset
= offset
+len
;
3435 if (end_dmi_offset
> ip
->i_size
)
3436 end_dmi_offset
= ip
->i_size
;
3437 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, ip
, offset
,
3438 end_dmi_offset
- offset
, 0, NULL
);
3444 * Allocate file space until done or until there is an error
3447 while (allocatesize_fsb
&& !error
) {
3451 * Determine space reservations for data/realtime.
3453 if (unlikely(extsz
)) {
3454 s
= startoffset_fsb
;
3457 e
= startoffset_fsb
+ allocatesize_fsb
;
3458 if ((temp
= do_mod(startoffset_fsb
, extsz
)))
3460 if ((temp
= do_mod(e
, extsz
)))
3464 e
= allocatesize_fsb
;
3468 resrtextents
= qblocks
= (uint
)(e
- s
);
3469 resrtextents
/= mp
->m_sb
.sb_rextsize
;
3470 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, 0);
3471 quota_flag
= XFS_QMOPT_RES_RTBLKS
;
3474 resblks
= qblocks
= \
3475 XFS_DIOSTRAT_SPACE_RES(mp
, (uint
)(e
- s
));
3476 quota_flag
= XFS_QMOPT_RES_REGBLKS
;
3480 * Allocate and setup the transaction.
3482 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
3483 error
= xfs_trans_reserve(tp
, resblks
,
3484 XFS_WRITE_LOG_RES(mp
), resrtextents
,
3485 XFS_TRANS_PERM_LOG_RES
,
3486 XFS_WRITE_LOG_COUNT
);
3488 * Check for running out of space
3492 * Free the transaction structure.
3494 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
3495 xfs_trans_cancel(tp
, 0);
3498 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3499 error
= XFS_TRANS_RESERVE_QUOTA_NBLKS(mp
, tp
, ip
,
3500 qblocks
, 0, quota_flag
);
3504 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3505 xfs_trans_ihold(tp
, ip
);
3508 * Issue the xfs_bmapi() call to allocate the blocks
3510 XFS_BMAP_INIT(&free_list
, &firstfsb
);
3511 error
= xfs_bmapi(tp
, ip
, startoffset_fsb
,
3512 allocatesize_fsb
, bmapi_flag
,
3513 &firstfsb
, 0, imapp
, &nimaps
,
3520 * Complete the transaction
3522 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
3527 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
3528 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3533 allocated_fsb
= imapp
->br_blockcount
;
3536 error
= XFS_ERROR(ENOSPC
);
3540 startoffset_fsb
+= allocated_fsb
;
3541 allocatesize_fsb
-= allocated_fsb
;
3544 if (error
== ENOSPC
&& (attr_flags
& ATTR_DMI
) == 0 &&
3545 DM_EVENT_ENABLED(ip
, DM_EVENT_NOSPACE
)) {
3546 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_NOSPACE
,
3549 NULL
, NULL
, 0, 0, 0); /* Delay flag intentionally unused */
3551 goto retry
; /* Maybe DMAPI app. has made space */
3552 /* else fall through with error from XFS_SEND_DATA */
3557 error0
: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */
3558 xfs_bmap_cancel(&free_list
);
3559 XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp
, tp
, ip
, qblocks
, 0, quota_flag
);
3561 error1
: /* Just cancel transaction */
3562 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
3563 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3564 goto dmapi_enospc_check
;
3568 * Zero file bytes between startoff and endoff inclusive.
3569 * The iolock is held exclusive and no blocks are buffered.
3572 xfs_zero_remaining_bytes(
3577 xfs_bmbt_irec_t imap
;
3578 xfs_fileoff_t offset_fsb
;
3579 xfs_off_t lastoffset
;
3582 xfs_mount_t
*mp
= ip
->i_mount
;
3586 bp
= xfs_buf_get_noaddr(mp
->m_sb
.sb_blocksize
,
3587 XFS_IS_REALTIME_INODE(ip
) ?
3588 mp
->m_rtdev_targp
: mp
->m_ddev_targp
);
3590 for (offset
= startoff
; offset
<= endoff
; offset
= lastoffset
+ 1) {
3591 offset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
3593 error
= xfs_bmapi(NULL
, ip
, offset_fsb
, 1, 0,
3594 NULL
, 0, &imap
, &nimap
, NULL
, NULL
);
3595 if (error
|| nimap
< 1)
3597 ASSERT(imap
.br_blockcount
>= 1);
3598 ASSERT(imap
.br_startoff
== offset_fsb
);
3599 lastoffset
= XFS_FSB_TO_B(mp
, imap
.br_startoff
+ 1) - 1;
3600 if (lastoffset
> endoff
)
3601 lastoffset
= endoff
;
3602 if (imap
.br_startblock
== HOLESTARTBLOCK
)
3604 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
3605 if (imap
.br_state
== XFS_EXT_UNWRITTEN
)
3608 XFS_BUF_UNWRITE(bp
);
3610 XFS_BUF_SET_ADDR(bp
, XFS_FSB_TO_DB(ip
, imap
.br_startblock
));
3612 error
= xfs_iowait(bp
);
3614 xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
3615 mp
, bp
, XFS_BUF_ADDR(bp
));
3618 memset(XFS_BUF_PTR(bp
) +
3619 (offset
- XFS_FSB_TO_B(mp
, imap
.br_startoff
)),
3620 0, lastoffset
- offset
+ 1);
3625 error
= xfs_iowait(bp
);
3627 xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
3628 mp
, bp
, XFS_BUF_ADDR(bp
));
3637 * xfs_free_file_space()
3638 * This routine frees disk space for the given file.
3640 * This routine is only called by xfs_change_file_space
3641 * for an UNRESVSP type call.
3649 xfs_free_file_space(
3658 xfs_off_t end_dmi_offset
;
3659 xfs_fileoff_t endoffset_fsb
;
3661 xfs_fsblock_t firstfsb
;
3662 xfs_bmap_free_t free_list
;
3663 xfs_bmbt_irec_t imap
;
3671 xfs_fileoff_t startoffset_fsb
;
3673 int need_iolock
= 1;
3678 xfs_itrace_entry(ip
);
3680 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
3684 if (len
<= 0) /* if nothing being freed */
3686 rt
= XFS_IS_REALTIME_INODE(ip
);
3687 startoffset_fsb
= XFS_B_TO_FSB(mp
, offset
);
3688 end_dmi_offset
= offset
+ len
;
3689 endoffset_fsb
= XFS_B_TO_FSBT(mp
, end_dmi_offset
);
3691 if (offset
< ip
->i_size
&& (attr_flags
& ATTR_DMI
) == 0 &&
3692 DM_EVENT_ENABLED(ip
, DM_EVENT_WRITE
)) {
3693 if (end_dmi_offset
> ip
->i_size
)
3694 end_dmi_offset
= ip
->i_size
;
3695 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, ip
,
3696 offset
, end_dmi_offset
- offset
,
3697 AT_DELAY_FLAG(attr_flags
), NULL
);
3702 if (attr_flags
& ATTR_NOLOCK
)
3705 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
3706 vn_iowait(ip
); /* wait for the completion of any pending DIOs */
3709 rounding
= max_t(uint
, 1 << mp
->m_sb
.sb_blocklog
, PAGE_CACHE_SIZE
);
3710 ioffset
= offset
& ~(rounding
- 1);
3712 if (VN_CACHED(vp
) != 0) {
3713 xfs_inval_cached_trace(ip
, ioffset
, -1, ioffset
, -1);
3714 error
= xfs_flushinval_pages(ip
, ioffset
, -1, FI_REMAPF_LOCKED
);
3716 goto out_unlock_iolock
;
3720 * Need to zero the stuff we're not freeing, on disk.
3721 * If its a realtime file & can't use unwritten extents then we
3722 * actually need to zero the extent edges. Otherwise xfs_bunmapi
3723 * will take care of it for us.
3725 if (rt
&& !xfs_sb_version_hasextflgbit(&mp
->m_sb
)) {
3727 error
= xfs_bmapi(NULL
, ip
, startoffset_fsb
,
3728 1, 0, NULL
, 0, &imap
, &nimap
, NULL
, NULL
);
3730 goto out_unlock_iolock
;
3731 ASSERT(nimap
== 0 || nimap
== 1);
3732 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
3735 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
3736 block
= imap
.br_startblock
;
3737 mod
= do_div(block
, mp
->m_sb
.sb_rextsize
);
3739 startoffset_fsb
+= mp
->m_sb
.sb_rextsize
- mod
;
3742 error
= xfs_bmapi(NULL
, ip
, endoffset_fsb
- 1,
3743 1, 0, NULL
, 0, &imap
, &nimap
, NULL
, NULL
);
3745 goto out_unlock_iolock
;
3746 ASSERT(nimap
== 0 || nimap
== 1);
3747 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
3748 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
3750 if (mod
&& (mod
!= mp
->m_sb
.sb_rextsize
))
3751 endoffset_fsb
-= mod
;
3754 if ((done
= (endoffset_fsb
<= startoffset_fsb
)))
3756 * One contiguous piece to clear
3758 error
= xfs_zero_remaining_bytes(ip
, offset
, offset
+ len
- 1);
3761 * Some full blocks, possibly two pieces to clear
3763 if (offset
< XFS_FSB_TO_B(mp
, startoffset_fsb
))
3764 error
= xfs_zero_remaining_bytes(ip
, offset
,
3765 XFS_FSB_TO_B(mp
, startoffset_fsb
) - 1);
3767 XFS_FSB_TO_B(mp
, endoffset_fsb
) < offset
+ len
)
3768 error
= xfs_zero_remaining_bytes(ip
,
3769 XFS_FSB_TO_B(mp
, endoffset_fsb
),
3774 * free file space until done or until there is an error
3776 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, 0);
3777 while (!error
&& !done
) {
3780 * allocate and setup the transaction. Allow this
3781 * transaction to dip into the reserve blocks to ensure
3782 * the freeing of the space succeeds at ENOSPC.
3784 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
3785 tp
->t_flags
|= XFS_TRANS_RESERVE
;
3786 error
= xfs_trans_reserve(tp
,
3788 XFS_WRITE_LOG_RES(mp
),
3790 XFS_TRANS_PERM_LOG_RES
,
3791 XFS_WRITE_LOG_COUNT
);
3794 * check for running out of space
3798 * Free the transaction structure.
3800 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
3801 xfs_trans_cancel(tp
, 0);
3804 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3805 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
,
3806 ip
->i_udquot
, ip
->i_gdquot
, resblks
, 0,
3807 XFS_QMOPT_RES_REGBLKS
);
3811 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3812 xfs_trans_ihold(tp
, ip
);
3815 * issue the bunmapi() call to free the blocks
3817 XFS_BMAP_INIT(&free_list
, &firstfsb
);
3818 error
= xfs_bunmapi(tp
, ip
, startoffset_fsb
,
3819 endoffset_fsb
- startoffset_fsb
,
3820 0, 2, &firstfsb
, &free_list
, NULL
, &done
);
3826 * complete the transaction
3828 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
3833 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
3834 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3839 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
3843 xfs_bmap_cancel(&free_list
);
3845 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
3846 xfs_iunlock(ip
, need_iolock
? (XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
) :
3852 * xfs_change_file_space()
3853 * This routine allocates or frees disk space for the given file.
3854 * The user specified parameters are checked for alignment and size
3863 xfs_change_file_space(
3871 xfs_mount_t
*mp
= ip
->i_mount
;
3876 xfs_off_t startoffset
;
3881 xfs_itrace_entry(ip
);
3883 if (!S_ISREG(ip
->i_d
.di_mode
))
3884 return XFS_ERROR(EINVAL
);
3886 switch (bf
->l_whence
) {
3887 case 0: /*SEEK_SET*/
3889 case 1: /*SEEK_CUR*/
3890 bf
->l_start
+= offset
;
3892 case 2: /*SEEK_END*/
3893 bf
->l_start
+= ip
->i_size
;
3896 return XFS_ERROR(EINVAL
);
3899 llen
= bf
->l_len
> 0 ? bf
->l_len
- 1 : bf
->l_len
;
3901 if ( (bf
->l_start
< 0)
3902 || (bf
->l_start
> XFS_MAXIOFFSET(mp
))
3903 || (bf
->l_start
+ llen
< 0)
3904 || (bf
->l_start
+ llen
> XFS_MAXIOFFSET(mp
)))
3905 return XFS_ERROR(EINVAL
);
3909 startoffset
= bf
->l_start
;
3913 * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
3915 * These calls do NOT zero the data space allocated to the file,
3916 * nor do they change the file size.
3918 * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
3920 * These calls cause the new file data to be zeroed and the file
3921 * size to be changed.
3923 setprealloc
= clrprealloc
= 0;
3926 case XFS_IOC_RESVSP
:
3927 case XFS_IOC_RESVSP64
:
3928 error
= xfs_alloc_file_space(ip
, startoffset
, bf
->l_len
,
3935 case XFS_IOC_UNRESVSP
:
3936 case XFS_IOC_UNRESVSP64
:
3937 if ((error
= xfs_free_file_space(ip
, startoffset
, bf
->l_len
,
3942 case XFS_IOC_ALLOCSP
:
3943 case XFS_IOC_ALLOCSP64
:
3944 case XFS_IOC_FREESP
:
3945 case XFS_IOC_FREESP64
:
3946 if (startoffset
> fsize
) {
3947 error
= xfs_alloc_file_space(ip
, fsize
,
3948 startoffset
- fsize
, 0, attr_flags
);
3953 va
.va_mask
= XFS_AT_SIZE
;
3954 va
.va_size
= startoffset
;
3956 error
= xfs_setattr(ip
, &va
, attr_flags
, credp
);
3966 return XFS_ERROR(EINVAL
);
3970 * update the inode timestamp, mode, and prealloc flag bits
3972 tp
= xfs_trans_alloc(mp
, XFS_TRANS_WRITEID
);
3974 if ((error
= xfs_trans_reserve(tp
, 0, XFS_WRITEID_LOG_RES(mp
),
3977 xfs_trans_cancel(tp
, 0);
3981 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3983 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3984 xfs_trans_ihold(tp
, ip
);
3986 if ((attr_flags
& ATTR_DMI
) == 0) {
3987 ip
->i_d
.di_mode
&= ~S_ISUID
;
3990 * Note that we don't have to worry about mandatory
3991 * file locking being disabled here because we only
3992 * clear the S_ISGID bit if the Group execute bit is
3993 * on, but if it was on then mandatory locking wouldn't
3994 * have been enabled.
3996 if (ip
->i_d
.di_mode
& S_IXGRP
)
3997 ip
->i_d
.di_mode
&= ~S_ISGID
;
3999 xfs_ichgtime(ip
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
4002 ip
->i_d
.di_flags
|= XFS_DIFLAG_PREALLOC
;
4003 else if (clrprealloc
)
4004 ip
->i_d
.di_flags
&= ~XFS_DIFLAG_PREALLOC
;
4006 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
4007 xfs_trans_set_sync(tp
);
4009 error
= xfs_trans_commit(tp
, 0);
4011 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);