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 struct xfs_dquot
*udqp
, *gdqp
, *olddquot1
, *olddquot2
;
101 xfs_itrace_entry(ip
);
103 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
104 return XFS_ERROR(EROFS
);
107 * Cannot set certain attributes.
110 if (mask
& XFS_AT_NOSET
) {
111 return XFS_ERROR(EINVAL
);
114 if (XFS_FORCED_SHUTDOWN(mp
))
115 return XFS_ERROR(EIO
);
118 * Timestamps do not need to be logged and hence do not
119 * need to be done within a transaction.
121 if (mask
& XFS_AT_UPDTIMES
) {
122 ASSERT((mask
& ~XFS_AT_UPDTIMES
) == 0);
123 timeflags
= ((mask
& XFS_AT_UPDATIME
) ? XFS_ICHGTIME_ACC
: 0) |
124 ((mask
& XFS_AT_UPDCTIME
) ? XFS_ICHGTIME_CHG
: 0) |
125 ((mask
& XFS_AT_UPDMTIME
) ? XFS_ICHGTIME_MOD
: 0);
126 xfs_ichgtime(ip
, timeflags
);
130 olddquot1
= olddquot2
= NULL
;
134 * If disk quotas is on, we make sure that the dquots do exist on disk,
135 * before we start any other transactions. Trying to do this later
136 * is messy. We don't care to take a readlock to look at the ids
137 * in inode here, because we can't hold it across the trans_reserve.
138 * If the IDs do change before we take the ilock, we're covered
139 * because the i_*dquot fields will get updated anyway.
141 if (XFS_IS_QUOTA_ON(mp
) && (mask
& (XFS_AT_UID
|XFS_AT_GID
))) {
144 if ((mask
& XFS_AT_UID
) && XFS_IS_UQUOTA_ON(mp
)) {
146 qflags
|= XFS_QMOPT_UQUOTA
;
148 uid
= ip
->i_d
.di_uid
;
150 if ((mask
& XFS_AT_GID
) && XFS_IS_GQUOTA_ON(mp
)) {
152 qflags
|= XFS_QMOPT_GQUOTA
;
154 gid
= ip
->i_d
.di_gid
;
158 * We take a reference when we initialize udqp and gdqp,
159 * so it is important that we never blindly double trip on
160 * the same variable. See xfs_create() for an example.
162 ASSERT(udqp
== NULL
);
163 ASSERT(gdqp
== NULL
);
164 code
= XFS_QM_DQVOPALLOC(mp
, ip
, uid
, gid
, ip
->i_d
.di_projid
,
165 qflags
, &udqp
, &gdqp
);
171 * For the other attributes, we acquire the inode lock and
172 * first do an error checking pass.
175 lock_flags
= XFS_ILOCK_EXCL
;
176 if (flags
& ATTR_NOLOCK
)
178 if (!(mask
& XFS_AT_SIZE
)) {
179 if ((mask
!= (XFS_AT_CTIME
|XFS_AT_ATIME
|XFS_AT_MTIME
)) ||
180 (mp
->m_flags
& XFS_MOUNT_WSYNC
)) {
181 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
183 if ((code
= xfs_trans_reserve(tp
, 0,
184 XFS_ICHANGE_LOG_RES(mp
), 0,
191 if (DM_EVENT_ENABLED(ip
, DM_EVENT_TRUNCATE
) &&
192 !(flags
& ATTR_DMI
)) {
193 int dmflags
= AT_DELAY_FLAG(flags
) | DM_SEM_FLAG_WR
;
194 code
= XFS_SEND_DATA(mp
, DM_EVENT_TRUNCATE
, ip
,
195 vap
->va_size
, 0, dmflags
, NULL
);
202 lock_flags
|= XFS_IOLOCK_EXCL
;
205 xfs_ilock(ip
, lock_flags
);
207 /* boolean: are we the file owner? */
208 file_owner
= (current_fsuid(credp
) == ip
->i_d
.di_uid
);
211 * Change various properties of a file.
212 * Only the owner or users with CAP_FOWNER
213 * capability may do these things.
215 if (mask
& (XFS_AT_MODE
|XFS_AT_UID
|XFS_AT_GID
)) {
217 * CAP_FOWNER overrides the following restrictions:
219 * The user ID of the calling process must be equal
220 * to the file owner ID, except in cases where the
221 * CAP_FSETID capability is applicable.
223 if (!file_owner
&& !capable(CAP_FOWNER
)) {
224 code
= XFS_ERROR(EPERM
);
229 * CAP_FSETID overrides the following restrictions:
231 * The effective user ID of the calling process shall match
232 * the file owner when setting the set-user-ID and
233 * set-group-ID bits on that file.
235 * The effective group ID or one of the supplementary group
236 * IDs of the calling process shall match the group owner of
237 * the file when setting the set-group-ID bit on that file
239 if (mask
& XFS_AT_MODE
) {
242 if ((vap
->va_mode
& S_ISUID
) && !file_owner
)
244 if ((vap
->va_mode
& S_ISGID
) &&
245 !in_group_p((gid_t
)ip
->i_d
.di_gid
))
248 /* Linux allows this, Irix doesn't. */
249 if ((vap
->va_mode
& S_ISVTX
) && !S_ISDIR(ip
->i_d
.di_mode
))
252 if (m
&& !capable(CAP_FSETID
))
258 * Change file ownership. Must be the owner or privileged.
259 * If the system was configured with the "restricted_chown"
260 * option, the owner is not permitted to give away the file,
261 * and can change the group id only to a group of which he
262 * or she is a member.
264 if (mask
& (XFS_AT_UID
|XFS_AT_GID
)) {
266 * These IDs could have changed since we last looked at them.
267 * But, we're assured that if the ownership did change
268 * while we didn't have the inode locked, inode's dquot(s)
269 * would have changed also.
271 iuid
= ip
->i_d
.di_uid
;
272 igid
= ip
->i_d
.di_gid
;
273 gid
= (mask
& XFS_AT_GID
) ? vap
->va_gid
: igid
;
274 uid
= (mask
& XFS_AT_UID
) ? vap
->va_uid
: iuid
;
277 * CAP_CHOWN overrides the following restrictions:
279 * If _POSIX_CHOWN_RESTRICTED is defined, this capability
280 * shall override the restriction that a process cannot
281 * change the user ID of a file it owns and the restriction
282 * that the group ID supplied to the chown() function
283 * shall be equal to either the group ID or one of the
284 * supplementary group IDs of the calling process.
286 if (restricted_chown
&&
287 (iuid
!= uid
|| (igid
!= gid
&&
288 !in_group_p((gid_t
)gid
))) &&
289 !capable(CAP_CHOWN
)) {
290 code
= XFS_ERROR(EPERM
);
294 * Do a quota reservation only if uid/gid is actually
297 if ((XFS_IS_UQUOTA_ON(mp
) && iuid
!= uid
) ||
298 (XFS_IS_GQUOTA_ON(mp
) && igid
!= gid
)) {
300 code
= XFS_QM_DQVOPCHOWNRESV(mp
, tp
, ip
, udqp
, gdqp
,
301 capable(CAP_FOWNER
) ?
302 XFS_QMOPT_FORCE_RES
: 0);
303 if (code
) /* out of quota */
309 * Truncate file. Must have write permission and not be a directory.
311 if (mask
& XFS_AT_SIZE
) {
312 /* Short circuit the truncate case for zero length files */
313 if ((vap
->va_size
== 0) &&
314 (ip
->i_size
== 0) && (ip
->i_d
.di_nextents
== 0)) {
315 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
316 lock_flags
&= ~XFS_ILOCK_EXCL
;
317 if (mask
& XFS_AT_CTIME
)
318 xfs_ichgtime(ip
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
323 if (S_ISDIR(ip
->i_d
.di_mode
)) {
324 code
= XFS_ERROR(EISDIR
);
326 } else if (!S_ISREG(ip
->i_d
.di_mode
)) {
327 code
= XFS_ERROR(EINVAL
);
331 * Make sure that the dquots are attached to the inode.
333 if ((code
= XFS_QM_DQATTACH(mp
, ip
, XFS_QMOPT_ILOCKED
)))
338 * Change file access or modified times.
340 if (mask
& (XFS_AT_ATIME
|XFS_AT_MTIME
)) {
342 if ((flags
& ATTR_UTIME
) &&
343 !capable(CAP_FOWNER
)) {
344 code
= XFS_ERROR(EPERM
);
351 * Now we can make the changes. Before we join the inode
352 * to the transaction, if XFS_AT_SIZE is set then take care of
353 * the part of the truncation that must be done without the
354 * inode lock. This needs to be done before joining the inode
355 * to the transaction, because the inode cannot be unlocked
356 * once it is a part of the transaction.
358 if (mask
& XFS_AT_SIZE
) {
360 if ((vap
->va_size
> ip
->i_size
) &&
361 (flags
& ATTR_NOSIZETOK
) == 0) {
363 * Do the first part of growing a file: zero any data
364 * in the last block that is beyond the old EOF. We
365 * need to do this before the inode is joined to the
366 * transaction to modify the i_size.
368 code
= xfs_zero_eof(ip
, vap
->va_size
, ip
->i_size
);
370 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
373 * We are going to log the inode size change in this
374 * transaction so any previous writes that are beyond the on
375 * disk EOF and the new EOF that have not been written out need
376 * to be written here. If we do not write the data out, we
377 * expose ourselves to the null files problem.
379 * Only flush from the on disk size to the smaller of the in
380 * memory file size or the new size as that's the range we
381 * really care about here and prevents waiting for other data
382 * not within the range we care about here.
385 (ip
->i_size
!= ip
->i_d
.di_size
) &&
386 (vap
->va_size
> ip
->i_d
.di_size
)) {
387 code
= xfs_flush_pages(ip
,
388 ip
->i_d
.di_size
, vap
->va_size
,
389 XFS_B_ASYNC
, FI_NONE
);
392 /* wait for all I/O to complete */
396 code
= xfs_itruncate_data(ip
, vap
->va_size
);
399 lock_flags
&= ~XFS_ILOCK_EXCL
;
400 ASSERT(lock_flags
== XFS_IOLOCK_EXCL
);
403 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_SIZE
);
404 if ((code
= xfs_trans_reserve(tp
, 0,
405 XFS_ITRUNCATE_LOG_RES(mp
), 0,
406 XFS_TRANS_PERM_LOG_RES
,
407 XFS_ITRUNCATE_LOG_COUNT
))) {
408 xfs_trans_cancel(tp
, 0);
410 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
413 commit_flags
= XFS_TRANS_RELEASE_LOG_RES
;
414 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
418 xfs_trans_ijoin(tp
, ip
, lock_flags
);
419 xfs_trans_ihold(tp
, ip
);
423 * Truncate file. Must have write permission and not be a directory.
425 if (mask
& XFS_AT_SIZE
) {
427 * Only change the c/mtime if we are changing the size
428 * or we are explicitly asked to change it. This handles
429 * the semantic difference between truncate() and ftruncate()
430 * as implemented in the VFS.
432 if (vap
->va_size
!= ip
->i_size
|| (mask
& XFS_AT_CTIME
))
433 timeflags
|= XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
;
435 if (vap
->va_size
> ip
->i_size
) {
436 ip
->i_d
.di_size
= vap
->va_size
;
437 ip
->i_size
= vap
->va_size
;
438 if (!(flags
& ATTR_DMI
))
439 xfs_ichgtime(ip
, XFS_ICHGTIME_CHG
);
440 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
441 } else if ((vap
->va_size
<= ip
->i_size
) ||
442 ((vap
->va_size
== 0) && ip
->i_d
.di_nextents
)) {
444 * signal a sync transaction unless
445 * we're truncating an already unlinked
446 * file on a wsync filesystem
448 code
= xfs_itruncate_finish(&tp
, ip
,
449 (xfs_fsize_t
)vap
->va_size
,
451 ((ip
->i_d
.di_nlink
!= 0 ||
452 !(mp
->m_flags
& XFS_MOUNT_WSYNC
))
457 * Truncated "down", so we're removing references
458 * to old data here - if we now delay flushing for
459 * a long time, we expose ourselves unduly to the
460 * notorious NULL files problem. So, we mark this
461 * vnode and flush it when the file is closed, and
462 * do not wait the usual (long) time for writeout.
464 xfs_iflags_set(ip
, XFS_ITRUNCATED
);
469 * Change file access modes.
471 if (mask
& XFS_AT_MODE
) {
472 ip
->i_d
.di_mode
&= S_IFMT
;
473 ip
->i_d
.di_mode
|= vap
->va_mode
& ~S_IFMT
;
475 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
476 timeflags
|= XFS_ICHGTIME_CHG
;
480 * Change file ownership. Must be the owner or privileged.
481 * If the system was configured with the "restricted_chown"
482 * option, the owner is not permitted to give away the file,
483 * and can change the group id only to a group of which he
484 * or she is a member.
486 if (mask
& (XFS_AT_UID
|XFS_AT_GID
)) {
488 * CAP_FSETID overrides the following restrictions:
490 * The set-user-ID and set-group-ID bits of a file will be
491 * cleared upon successful return from chown()
493 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
494 !capable(CAP_FSETID
)) {
495 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
499 * Change the ownerships and register quota modifications
500 * in the transaction.
503 if (XFS_IS_UQUOTA_ON(mp
)) {
504 ASSERT(mask
& XFS_AT_UID
);
506 olddquot1
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
507 &ip
->i_udquot
, udqp
);
509 ip
->i_d
.di_uid
= uid
;
512 if (XFS_IS_GQUOTA_ON(mp
)) {
513 ASSERT(!XFS_IS_PQUOTA_ON(mp
));
514 ASSERT(mask
& XFS_AT_GID
);
516 olddquot2
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
517 &ip
->i_gdquot
, gdqp
);
519 ip
->i_d
.di_gid
= gid
;
522 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
523 timeflags
|= XFS_ICHGTIME_CHG
;
528 * Change file access or modified times.
530 if (mask
& (XFS_AT_ATIME
|XFS_AT_MTIME
)) {
531 if (mask
& XFS_AT_ATIME
) {
532 ip
->i_d
.di_atime
.t_sec
= vap
->va_atime
.tv_sec
;
533 ip
->i_d
.di_atime
.t_nsec
= vap
->va_atime
.tv_nsec
;
534 ip
->i_update_core
= 1;
535 timeflags
&= ~XFS_ICHGTIME_ACC
;
537 if (mask
& XFS_AT_MTIME
) {
538 ip
->i_d
.di_mtime
.t_sec
= vap
->va_mtime
.tv_sec
;
539 ip
->i_d
.di_mtime
.t_nsec
= vap
->va_mtime
.tv_nsec
;
540 timeflags
&= ~XFS_ICHGTIME_MOD
;
541 timeflags
|= XFS_ICHGTIME_CHG
;
543 if (tp
&& (flags
& ATTR_UTIME
))
544 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
548 * Change file inode change time only if XFS_AT_CTIME set
549 * AND we have been called by a DMI function.
552 if ( (flags
& ATTR_DMI
) && (mask
& XFS_AT_CTIME
) ) {
553 ip
->i_d
.di_ctime
.t_sec
= vap
->va_ctime
.tv_sec
;
554 ip
->i_d
.di_ctime
.t_nsec
= vap
->va_ctime
.tv_nsec
;
555 ip
->i_update_core
= 1;
556 timeflags
&= ~XFS_ICHGTIME_CHG
;
560 * Send out timestamp changes that need to be set to the
561 * current time. Not done when called by a DMI function.
563 if (timeflags
&& !(flags
& ATTR_DMI
))
564 xfs_ichgtime(ip
, timeflags
);
566 XFS_STATS_INC(xs_ig_attrchg
);
569 * If this is a synchronous mount, make sure that the
570 * transaction goes to disk before returning to the user.
571 * This is slightly sub-optimal in that truncates require
572 * two sync transactions instead of one for wsync filesystems.
573 * One for the truncate and one for the timestamps since we
574 * don't want to change the timestamps unless we're sure the
575 * truncate worked. Truncates are less than 1% of the laddis
576 * mix so this probably isn't worth the trouble to optimize.
580 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
581 xfs_trans_set_sync(tp
);
583 code
= xfs_trans_commit(tp
, commit_flags
);
586 xfs_iunlock(ip
, lock_flags
);
589 * Release any dquot(s) the inode had kept before chown.
591 XFS_QM_DQRELE(mp
, olddquot1
);
592 XFS_QM_DQRELE(mp
, olddquot2
);
593 XFS_QM_DQRELE(mp
, udqp
);
594 XFS_QM_DQRELE(mp
, gdqp
);
600 if (DM_EVENT_ENABLED(ip
, DM_EVENT_ATTRIBUTE
) &&
601 !(flags
& ATTR_DMI
)) {
602 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, ip
, DM_RIGHT_NULL
,
603 NULL
, DM_RIGHT_NULL
, NULL
, NULL
,
604 0, 0, AT_DELAY_FLAG(flags
));
609 commit_flags
|= XFS_TRANS_ABORT
;
612 XFS_QM_DQRELE(mp
, udqp
);
613 XFS_QM_DQRELE(mp
, gdqp
);
615 xfs_trans_cancel(tp
, commit_flags
);
617 if (lock_flags
!= 0) {
618 xfs_iunlock(ip
, lock_flags
);
624 * The maximum pathlen is 1024 bytes. Since the minimum file system
625 * blocksize is 512 bytes, we can get a max of 2 extents back from
628 #define SYMLINK_MAPS 2
635 xfs_mount_t
*mp
= ip
->i_mount
;
636 int pathlen
= ip
->i_d
.di_size
;
637 int nmaps
= SYMLINK_MAPS
;
638 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
645 error
= xfs_bmapi(NULL
, ip
, 0, XFS_B_TO_FSB(mp
, pathlen
), 0, NULL
, 0,
646 mval
, &nmaps
, NULL
, NULL
);
650 for (n
= 0; n
< nmaps
; n
++) {
651 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
652 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
654 bp
= xfs_buf_read(mp
->m_ddev_targp
, d
, BTOBB(byte_cnt
), 0);
655 error
= XFS_BUF_GETERROR(bp
);
657 xfs_ioerror_alert("xfs_readlink",
658 ip
->i_mount
, bp
, XFS_BUF_ADDR(bp
));
662 if (pathlen
< byte_cnt
)
666 memcpy(link
, XFS_BUF_PTR(bp
), byte_cnt
);
670 link
[ip
->i_d
.di_size
] = '\0';
682 xfs_mount_t
*mp
= ip
->i_mount
;
686 xfs_itrace_entry(ip
);
688 if (XFS_FORCED_SHUTDOWN(mp
))
689 return XFS_ERROR(EIO
);
691 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
693 ASSERT((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
);
694 ASSERT(ip
->i_d
.di_size
<= MAXPATHLEN
);
696 pathlen
= ip
->i_d
.di_size
;
700 if (ip
->i_df
.if_flags
& XFS_IFINLINE
) {
701 memcpy(link
, ip
->i_df
.if_u1
.if_data
, pathlen
);
702 link
[pathlen
] = '\0';
704 error
= xfs_readlink_bmap(ip
, link
);
708 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
715 * This is called to sync the inode and its data out to disk. We need to hold
716 * the I/O lock while flushing the data, and the inode lock while flushing the
717 * inode. The inode lock CANNOT be held while flushing the data, so acquire
718 * after we're done with that.
726 int log_flushed
= 0, changed
= 1;
728 xfs_itrace_entry(ip
);
730 if (XFS_FORCED_SHUTDOWN(ip
->i_mount
))
731 return XFS_ERROR(EIO
);
733 /* capture size updates in I/O completion before writing the inode. */
734 error
= filemap_fdatawait(vn_to_inode(XFS_ITOV(ip
))->i_mapping
);
736 return XFS_ERROR(error
);
739 * We always need to make sure that the required inode state is safe on
740 * disk. The vnode might be clean but we still might need to force the
741 * log because of committed transactions that haven't hit the disk yet.
742 * Likewise, there could be unflushed non-transactional changes to the
743 * inode core that have to go to disk and this requires us to issue
744 * a synchronous transaction to capture these changes correctly.
746 * This code relies on the assumption that if the update_* fields
747 * of the inode are clear and the inode is unpinned then it is clean
748 * and no action is required.
750 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
752 if (!(ip
->i_update_size
|| ip
->i_update_core
)) {
754 * Timestamps/size haven't changed since last inode flush or
755 * inode transaction commit. That means either nothing got
756 * written or a transaction committed which caught the updates.
757 * If the latter happened and the transaction hasn't hit the
758 * disk yet, the inode will be still be pinned. If it is,
762 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
764 if (xfs_ipincount(ip
)) {
765 error
= _xfs_log_force(ip
->i_mount
, (xfs_lsn_t
)0,
766 XFS_LOG_FORCE
| XFS_LOG_SYNC
,
770 * If the inode is not pinned and nothing has changed
771 * we don't need to flush the cache.
777 * Kick off a transaction to log the inode core to get the
778 * updates. The sync transaction will also force the log.
780 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
781 tp
= xfs_trans_alloc(ip
->i_mount
, XFS_TRANS_FSYNC_TS
);
782 error
= xfs_trans_reserve(tp
, 0,
783 XFS_FSYNC_TS_LOG_RES(ip
->i_mount
), 0, 0, 0);
785 xfs_trans_cancel(tp
, 0);
788 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
791 * Note - it's possible that we might have pushed ourselves out
792 * of the way during trans_reserve which would flush the inode.
793 * But there's no guarantee that the inode buffer has actually
794 * gone out yet (it's delwri). Plus the buffer could be pinned
795 * anyway if it's part of an inode in another recent
796 * transaction. So we play it safe and fire off the
797 * transaction anyway.
799 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
800 xfs_trans_ihold(tp
, ip
);
801 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
802 xfs_trans_set_sync(tp
);
803 error
= _xfs_trans_commit(tp
, 0, &log_flushed
);
805 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
808 if ((ip
->i_mount
->m_flags
& XFS_MOUNT_BARRIER
) && changed
) {
810 * If the log write didn't issue an ordered tag we need
811 * to flush the disk cache for the data device now.
814 xfs_blkdev_issue_flush(ip
->i_mount
->m_ddev_targp
);
817 * If this inode is on the RT dev we need to flush that
820 if (XFS_IS_REALTIME_INODE(ip
))
821 xfs_blkdev_issue_flush(ip
->i_mount
->m_rtdev_targp
);
828 * This is called by xfs_inactive to free any blocks beyond eof
829 * when the link count isn't zero and by xfs_dm_punch_hole() when
830 * punching a hole to EOF.
840 xfs_fileoff_t end_fsb
;
841 xfs_fileoff_t last_fsb
;
842 xfs_filblks_t map_len
;
844 xfs_bmbt_irec_t imap
;
845 int use_iolock
= (flags
& XFS_FREE_EOF_LOCK
);
848 * Figure out if there are any blocks beyond the end
849 * of the file. If not, then there is nothing to do.
851 end_fsb
= XFS_B_TO_FSB(mp
, ((xfs_ufsize_t
)ip
->i_size
));
852 last_fsb
= XFS_B_TO_FSB(mp
, (xfs_ufsize_t
)XFS_MAXIOFFSET(mp
));
853 map_len
= last_fsb
- end_fsb
;
858 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
859 error
= xfs_bmapi(NULL
, ip
, end_fsb
, map_len
, 0,
860 NULL
, 0, &imap
, &nimaps
, NULL
, NULL
);
861 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
863 if (!error
&& (nimaps
!= 0) &&
864 (imap
.br_startblock
!= HOLESTARTBLOCK
||
865 ip
->i_delayed_blks
)) {
867 * Attach the dquots to the inode up front.
869 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
873 * There are blocks after the end of file.
874 * Free them up now by truncating the file to
877 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
880 * Do the xfs_itruncate_start() call before
881 * reserving any log space because
882 * itruncate_start will call into the buffer
884 * do that within a transaction.
887 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
888 error
= xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
,
891 xfs_trans_cancel(tp
, 0);
893 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
897 error
= xfs_trans_reserve(tp
, 0,
898 XFS_ITRUNCATE_LOG_RES(mp
),
899 0, XFS_TRANS_PERM_LOG_RES
,
900 XFS_ITRUNCATE_LOG_COUNT
);
902 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
903 xfs_trans_cancel(tp
, 0);
904 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
908 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
909 xfs_trans_ijoin(tp
, ip
,
912 xfs_trans_ihold(tp
, ip
);
914 error
= xfs_itruncate_finish(&tp
, ip
,
919 * If we get an error at this point we
920 * simply don't bother truncating the file.
924 (XFS_TRANS_RELEASE_LOG_RES
|
927 error
= xfs_trans_commit(tp
,
928 XFS_TRANS_RELEASE_LOG_RES
);
930 xfs_iunlock(ip
, (use_iolock
? (XFS_IOLOCK_EXCL
|XFS_ILOCK_EXCL
)
937 * Free a symlink that has blocks associated with it.
940 xfs_inactive_symlink_rmt(
948 xfs_fsblock_t first_block
;
949 xfs_bmap_free_t free_list
;
952 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
960 ASSERT(ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
));
962 * We're freeing a symlink that has some
963 * blocks allocated to it. Free the
964 * blocks here. We know that we've got
965 * either 1 or 2 extents and that we can
966 * free them all in one bunmapi call.
968 ASSERT(ip
->i_d
.di_nextents
> 0 && ip
->i_d
.di_nextents
<= 2);
969 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
970 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
971 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
972 xfs_trans_cancel(tp
, 0);
977 * Lock the inode, fix the size, and join it to the transaction.
978 * Hold it so in the normal path, we still have it locked for
979 * the second transaction. In the error paths we need it
980 * held so the cancel won't rele it, see below.
982 xfs_ilock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
983 size
= (int)ip
->i_d
.di_size
;
985 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
986 xfs_trans_ihold(tp
, ip
);
987 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
989 * Find the block(s) so we can inval and unmap them.
992 XFS_BMAP_INIT(&free_list
, &first_block
);
993 nmaps
= ARRAY_SIZE(mval
);
994 if ((error
= xfs_bmapi(tp
, ip
, 0, XFS_B_TO_FSB(mp
, size
),
995 XFS_BMAPI_METADATA
, &first_block
, 0, mval
, &nmaps
,
999 * Invalidate the block(s).
1001 for (i
= 0; i
< nmaps
; i
++) {
1002 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
,
1003 XFS_FSB_TO_DADDR(mp
, mval
[i
].br_startblock
),
1004 XFS_FSB_TO_BB(mp
, mval
[i
].br_blockcount
), 0);
1005 xfs_trans_binval(tp
, bp
);
1008 * Unmap the dead block(s) to the free_list.
1010 if ((error
= xfs_bunmapi(tp
, ip
, 0, size
, XFS_BMAPI_METADATA
, nmaps
,
1011 &first_block
, &free_list
, NULL
, &done
)))
1015 * Commit the first transaction. This logs the EFI and the inode.
1017 if ((error
= xfs_bmap_finish(&tp
, &free_list
, &committed
)))
1020 * The transaction must have been committed, since there were
1021 * actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
1022 * The new tp has the extent freeing and EFDs.
1026 * The first xact was committed, so add the inode to the new one.
1027 * Mark it dirty so it will be logged and moved forward in the log as
1028 * part of every commit.
1030 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1031 xfs_trans_ihold(tp
, ip
);
1032 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1034 * Get a new, empty transaction to return to our caller.
1036 ntp
= xfs_trans_dup(tp
);
1038 * Commit the transaction containing extent freeing and EFDs.
1039 * If we get an error on the commit here or on the reserve below,
1040 * we need to unlock the inode since the new transaction doesn't
1041 * have the inode attached.
1043 error
= xfs_trans_commit(tp
, 0);
1046 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1050 * Remove the memory for extent descriptions (just bookkeeping).
1052 if (ip
->i_df
.if_bytes
)
1053 xfs_idata_realloc(ip
, -ip
->i_df
.if_bytes
, XFS_DATA_FORK
);
1054 ASSERT(ip
->i_df
.if_bytes
== 0);
1056 * Put an itruncate log reservation in the new transaction
1059 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
1060 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
1061 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1065 * Return with the inode locked but not joined to the transaction.
1071 xfs_bmap_cancel(&free_list
);
1074 * Have to come here with the inode locked and either
1075 * (held and in the transaction) or (not in the transaction).
1076 * If the inode isn't held then cancel would iput it, but
1077 * that's wrong since this is inactive and the vnode ref
1078 * count is 0 already.
1079 * Cancel won't do anything to the inode if held, but it still
1080 * needs to be locked until the cancel is done, if it was
1081 * joined to the transaction.
1083 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1084 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1091 xfs_inactive_symlink_local(
1097 ASSERT(ip
->i_d
.di_size
<= XFS_IFORK_DSIZE(ip
));
1099 * We're freeing a symlink which fit into
1100 * the inode. Just free the memory used
1101 * to hold the old symlink.
1103 error
= xfs_trans_reserve(*tpp
, 0,
1104 XFS_ITRUNCATE_LOG_RES(ip
->i_mount
),
1105 0, XFS_TRANS_PERM_LOG_RES
,
1106 XFS_ITRUNCATE_LOG_COUNT
);
1109 xfs_trans_cancel(*tpp
, 0);
1113 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1116 * Zero length symlinks _can_ exist.
1118 if (ip
->i_df
.if_bytes
> 0) {
1119 xfs_idata_realloc(ip
,
1120 -(ip
->i_df
.if_bytes
),
1122 ASSERT(ip
->i_df
.if_bytes
== 0);
1136 ASSERT(xfs_isilocked(ip
, XFS_IOLOCK_EXCL
));
1139 ASSERT(ip
->i_d
.di_forkoff
!= 0);
1140 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
1141 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1145 error
= xfs_attr_inactive(ip
);
1149 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1150 error
= xfs_trans_reserve(tp
, 0,
1151 XFS_IFREE_LOG_RES(mp
),
1152 0, XFS_TRANS_PERM_LOG_RES
,
1153 XFS_INACTIVE_LOG_COUNT
);
1157 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1158 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1159 xfs_trans_ihold(tp
, ip
);
1160 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1162 ASSERT(ip
->i_d
.di_anextents
== 0);
1168 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1169 xfs_trans_cancel(tp
, 0);
1172 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1180 bhv_vnode_t
*vp
= XFS_ITOV(ip
);
1181 xfs_mount_t
*mp
= ip
->i_mount
;
1184 if (!S_ISREG(ip
->i_d
.di_mode
) || (ip
->i_d
.di_mode
== 0))
1187 /* If this is a read-only mount, don't do this (would generate I/O) */
1188 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
1191 if (!XFS_FORCED_SHUTDOWN(mp
)) {
1195 * If we are using filestreams, and we have an unlinked
1196 * file that we are processing the last close on, then nothing
1197 * will be able to reopen and write to this file. Purge this
1198 * inode from the filestreams cache so that it doesn't delay
1199 * teardown of the inode.
1201 if ((ip
->i_d
.di_nlink
== 0) && xfs_inode_is_filestream(ip
))
1202 xfs_filestream_deassociate(ip
);
1205 * If we previously truncated this file and removed old data
1206 * in the process, we want to initiate "early" writeout on
1207 * the last close. This is an attempt to combat the notorious
1208 * NULL files problem which is particularly noticable from a
1209 * truncate down, buffered (re-)write (delalloc), followed by
1210 * a crash. What we are effectively doing here is
1211 * significantly reducing the time window where we'd otherwise
1212 * be exposed to that problem.
1214 truncated
= xfs_iflags_test_and_clear(ip
, XFS_ITRUNCATED
);
1215 if (truncated
&& VN_DIRTY(vp
) && ip
->i_delayed_blks
> 0)
1216 xfs_flush_pages(ip
, 0, -1, XFS_B_ASYNC
, FI_NONE
);
1219 if (ip
->i_d
.di_nlink
!= 0) {
1220 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1221 ((ip
->i_size
> 0) || (VN_CACHED(vp
) > 0 ||
1222 ip
->i_delayed_blks
> 0)) &&
1223 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)) &&
1224 (!(ip
->i_d
.di_flags
&
1225 (XFS_DIFLAG_PREALLOC
| XFS_DIFLAG_APPEND
)))) {
1226 error
= xfs_free_eofblocks(mp
, ip
, XFS_FREE_EOF_LOCK
);
1238 * This is called when the vnode reference count for the vnode
1239 * goes to zero. If the file has been unlinked, then it must
1240 * now be truncated. Also, we clear all of the read-ahead state
1241 * kept for the inode here since the file is now closed.
1247 bhv_vnode_t
*vp
= XFS_ITOV(ip
);
1248 xfs_bmap_free_t free_list
;
1249 xfs_fsblock_t first_block
;
1256 xfs_itrace_entry(ip
);
1259 * If the inode is already free, then there can be nothing
1262 if (ip
->i_d
.di_mode
== 0 || VN_BAD(vp
)) {
1263 ASSERT(ip
->i_df
.if_real_bytes
== 0);
1264 ASSERT(ip
->i_df
.if_broot_bytes
== 0);
1265 return VN_INACTIVE_CACHE
;
1269 * Only do a truncate if it's a regular file with
1270 * some actual space in it. It's OK to look at the
1271 * inode's fields without the lock because we're the
1272 * only one with a reference to the inode.
1274 truncate
= ((ip
->i_d
.di_nlink
== 0) &&
1275 ((ip
->i_d
.di_size
!= 0) || (ip
->i_size
!= 0) ||
1276 (ip
->i_d
.di_nextents
> 0) || (ip
->i_delayed_blks
> 0)) &&
1277 ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
));
1281 if (ip
->i_d
.di_nlink
== 0 && DM_EVENT_ENABLED(ip
, DM_EVENT_DESTROY
))
1282 XFS_SEND_DESTROY(mp
, ip
, DM_RIGHT_NULL
);
1286 /* If this is a read-only mount, don't do this (would generate I/O) */
1287 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
1290 if (ip
->i_d
.di_nlink
!= 0) {
1291 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1292 ((ip
->i_size
> 0) || (VN_CACHED(vp
) > 0 ||
1293 ip
->i_delayed_blks
> 0)) &&
1294 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
) &&
1295 (!(ip
->i_d
.di_flags
&
1296 (XFS_DIFLAG_PREALLOC
| XFS_DIFLAG_APPEND
)) ||
1297 (ip
->i_delayed_blks
!= 0)))) {
1298 error
= xfs_free_eofblocks(mp
, ip
, XFS_FREE_EOF_LOCK
);
1300 return VN_INACTIVE_CACHE
;
1305 ASSERT(ip
->i_d
.di_nlink
== 0);
1307 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
1308 return VN_INACTIVE_CACHE
;
1310 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1313 * Do the xfs_itruncate_start() call before
1314 * reserving any log space because itruncate_start
1315 * will call into the buffer cache and we can't
1316 * do that within a transaction.
1318 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
1320 error
= xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
, 0);
1322 xfs_trans_cancel(tp
, 0);
1323 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1324 return VN_INACTIVE_CACHE
;
1327 error
= xfs_trans_reserve(tp
, 0,
1328 XFS_ITRUNCATE_LOG_RES(mp
),
1329 0, XFS_TRANS_PERM_LOG_RES
,
1330 XFS_ITRUNCATE_LOG_COUNT
);
1332 /* Don't call itruncate_cleanup */
1333 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1334 xfs_trans_cancel(tp
, 0);
1335 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1336 return VN_INACTIVE_CACHE
;
1339 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1340 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1341 xfs_trans_ihold(tp
, ip
);
1344 * normally, we have to run xfs_itruncate_finish sync.
1345 * But if filesystem is wsync and we're in the inactive
1346 * path, then we know that nlink == 0, and that the
1347 * xaction that made nlink == 0 is permanently committed
1348 * since xfs_remove runs as a synchronous transaction.
1350 error
= xfs_itruncate_finish(&tp
, ip
, 0, XFS_DATA_FORK
,
1351 (!(mp
->m_flags
& XFS_MOUNT_WSYNC
) ? 1 : 0));
1354 xfs_trans_cancel(tp
,
1355 XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1356 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1357 return VN_INACTIVE_CACHE
;
1359 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
) {
1362 * If we get an error while cleaning up a
1363 * symlink we bail out.
1365 error
= (ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
)) ?
1366 xfs_inactive_symlink_rmt(ip
, &tp
) :
1367 xfs_inactive_symlink_local(ip
, &tp
);
1371 return VN_INACTIVE_CACHE
;
1374 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1375 xfs_trans_ihold(tp
, ip
);
1377 error
= xfs_trans_reserve(tp
, 0,
1378 XFS_IFREE_LOG_RES(mp
),
1379 0, XFS_TRANS_PERM_LOG_RES
,
1380 XFS_INACTIVE_LOG_COUNT
);
1382 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1383 xfs_trans_cancel(tp
, 0);
1384 return VN_INACTIVE_CACHE
;
1387 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1388 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1389 xfs_trans_ihold(tp
, ip
);
1393 * If there are attributes associated with the file
1394 * then blow them away now. The code calls a routine
1395 * that recursively deconstructs the attribute fork.
1396 * We need to just commit the current transaction
1397 * because we can't use it for xfs_attr_inactive().
1399 if (ip
->i_d
.di_anextents
> 0) {
1400 error
= xfs_inactive_attrs(ip
, &tp
);
1402 * If we got an error, the transaction is already
1403 * cancelled, and the inode is unlocked. Just get out.
1406 return VN_INACTIVE_CACHE
;
1407 } else if (ip
->i_afp
) {
1408 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1414 XFS_BMAP_INIT(&free_list
, &first_block
);
1415 error
= xfs_ifree(tp
, ip
, &free_list
);
1418 * If we fail to free the inode, shut down. The cancel
1419 * might do that, we need to make sure. Otherwise the
1420 * inode might be lost for a long time or forever.
1422 if (!XFS_FORCED_SHUTDOWN(mp
)) {
1424 "xfs_inactive: xfs_ifree() returned an error = %d on %s",
1425 error
, mp
->m_fsname
);
1426 xfs_force_shutdown(mp
, SHUTDOWN_META_IO_ERROR
);
1428 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
|XFS_TRANS_ABORT
);
1431 * Credit the quota account(s). The inode is gone.
1433 XFS_TRANS_MOD_DQUOT_BYINO(mp
, tp
, ip
, XFS_TRANS_DQ_ICOUNT
, -1);
1436 * Just ignore errors at this point. There is nothing we can
1437 * do except to try to keep going. Make sure it's not a silent
1440 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
1442 xfs_fs_cmn_err(CE_NOTE
, mp
, "xfs_inactive: "
1443 "xfs_bmap_finish() returned error %d", error
);
1444 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
1446 xfs_fs_cmn_err(CE_NOTE
, mp
, "xfs_inactive: "
1447 "xfs_trans_commit() returned error %d", error
);
1450 * Release the dquots held by inode, if any.
1452 XFS_QM_DQDETACH(mp
, ip
);
1454 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1457 return VN_INACTIVE_CACHE
;
1461 * Lookups up an inode from "name". If ci_name is not NULL, then a CI match
1462 * is allowed, otherwise it has to be an exact match. If a CI match is found,
1463 * ci_name->name will point to a the actual name (caller must free) or
1464 * will be set to NULL if an exact match is found.
1469 struct xfs_name
*name
,
1471 struct xfs_name
*ci_name
)
1477 xfs_itrace_entry(dp
);
1479 if (XFS_FORCED_SHUTDOWN(dp
->i_mount
))
1480 return XFS_ERROR(EIO
);
1482 lock_mode
= xfs_ilock_map_shared(dp
);
1483 error
= xfs_dir_lookup(NULL
, dp
, name
, &inum
, ci_name
);
1484 xfs_iunlock_map_shared(dp
, lock_mode
);
1489 error
= xfs_iget(dp
->i_mount
, NULL
, inum
, 0, 0, ipp
, 0);
1493 xfs_itrace_ref(*ipp
);
1498 kmem_free(ci_name
->name
);
1507 struct xfs_name
*name
,
1513 xfs_mount_t
*mp
= dp
->i_mount
;
1517 xfs_bmap_free_t free_list
;
1518 xfs_fsblock_t first_block
;
1519 boolean_t unlock_dp_on_error
= B_FALSE
;
1520 int dm_event_sent
= 0;
1524 struct xfs_dquot
*udqp
, *gdqp
;
1528 xfs_itrace_entry(dp
);
1530 if (DM_EVENT_ENABLED(dp
, DM_EVENT_CREATE
)) {
1531 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
1532 dp
, DM_RIGHT_NULL
, NULL
,
1533 DM_RIGHT_NULL
, name
->name
, NULL
,
1541 if (XFS_FORCED_SHUTDOWN(mp
))
1542 return XFS_ERROR(EIO
);
1544 /* Return through std_return after this point. */
1547 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
1548 prid
= dp
->i_d
.di_projid
;
1550 prid
= (xfs_prid_t
)dfltprid
;
1553 * Make sure that we have allocated dquot(s) on disk.
1555 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
1556 current_fsuid(credp
), current_fsgid(credp
), prid
,
1557 XFS_QMOPT_QUOTALL
|XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
1563 tp
= xfs_trans_alloc(mp
, XFS_TRANS_CREATE
);
1564 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
1565 resblks
= XFS_CREATE_SPACE_RES(mp
, name
->len
);
1567 * Initially assume that the file does not exist and
1568 * reserve the resources for that case. If that is not
1569 * the case we'll drop the one we have and get a more
1570 * appropriate transaction later.
1572 error
= xfs_trans_reserve(tp
, resblks
, XFS_CREATE_LOG_RES(mp
), 0,
1573 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1574 if (error
== ENOSPC
) {
1576 error
= xfs_trans_reserve(tp
, 0, XFS_CREATE_LOG_RES(mp
), 0,
1577 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1584 xfs_ilock(dp
, XFS_ILOCK_EXCL
| XFS_ILOCK_PARENT
);
1585 unlock_dp_on_error
= B_TRUE
;
1587 XFS_BMAP_INIT(&free_list
, &first_block
);
1592 * Reserve disk quota and the inode.
1594 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
1598 error
= xfs_dir_canenter(tp
, dp
, name
, resblks
);
1601 error
= xfs_dir_ialloc(&tp
, dp
, mode
, 1,
1602 rdev
, credp
, prid
, resblks
> 0,
1605 if (error
== ENOSPC
)
1612 * At this point, we've gotten a newly allocated inode.
1613 * It is locked (and joined to the transaction).
1616 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
1619 * Now we join the directory inode to the transaction. We do not do it
1620 * earlier because xfs_dir_ialloc might commit the previous transaction
1621 * (and release all the locks). An error from here on will result in
1622 * the transaction cancel unlocking dp so don't do it explicitly in the
1626 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
1627 unlock_dp_on_error
= B_FALSE
;
1629 error
= xfs_dir_createname(tp
, dp
, name
, ip
->i_ino
,
1630 &first_block
, &free_list
, resblks
?
1631 resblks
- XFS_IALLOC_SPACE_RES(mp
) : 0);
1633 ASSERT(error
!= ENOSPC
);
1636 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
1637 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
1640 * If this is a synchronous mount, make sure that the
1641 * create transaction goes to disk before returning to
1644 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
1645 xfs_trans_set_sync(tp
);
1651 * Attach the dquot(s) to the inodes and modify them incore.
1652 * These ids of the inode couldn't have changed since the new
1653 * inode has been locked ever since it was created.
1655 XFS_QM_DQVOPCREATE(mp
, tp
, ip
, udqp
, gdqp
);
1658 * xfs_trans_commit normally decrements the vnode ref count
1659 * when it unlocks the inode. Since we want to return the
1660 * vnode to the caller, we bump the vnode ref count now.
1664 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
1666 xfs_bmap_cancel(&free_list
);
1670 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
1677 XFS_QM_DQRELE(mp
, udqp
);
1678 XFS_QM_DQRELE(mp
, gdqp
);
1682 /* Fallthrough to std_return with error = 0 */
1685 if ((*ipp
|| (error
!= 0 && dm_event_sent
!= 0)) &&
1686 DM_EVENT_ENABLED(dp
, DM_EVENT_POSTCREATE
)) {
1687 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTCREATE
,
1690 DM_RIGHT_NULL
, name
->name
, NULL
,
1696 cancel_flags
|= XFS_TRANS_ABORT
;
1701 xfs_trans_cancel(tp
, cancel_flags
);
1703 XFS_QM_DQRELE(mp
, udqp
);
1704 XFS_QM_DQRELE(mp
, gdqp
);
1706 if (unlock_dp_on_error
)
1707 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
1713 * Wait until after the current transaction is aborted to
1714 * release the inode. This prevents recursive transactions
1715 * and deadlocks from xfs_inactive.
1717 cancel_flags
|= XFS_TRANS_ABORT
;
1718 xfs_trans_cancel(tp
, cancel_flags
);
1721 XFS_QM_DQRELE(mp
, udqp
);
1722 XFS_QM_DQRELE(mp
, gdqp
);
1729 * Some counters to see if (and how often) we are hitting some deadlock
1730 * prevention code paths.
1734 int xfs_rm_lock_delays
;
1735 int xfs_rm_attempts
;
1739 * The following routine will lock the inodes associated with the
1740 * directory and the named entry in the directory. The locks are
1741 * acquired in increasing inode number.
1743 * If the entry is "..", then only the directory is locked. The
1744 * vnode ref count will still include that from the .. entry in
1747 * There is a deadlock we need to worry about. If the locked directory is
1748 * in the AIL, it might be blocking up the log. The next inode we lock
1749 * could be already locked by another thread waiting for log space (e.g
1750 * a permanent log reservation with a long running transaction (see
1751 * xfs_itruncate_finish)). To solve this, we must check if the directory
1752 * is in the ail and use lock_nowait. If we can't lock, we need to
1753 * drop the inode lock on the directory and try again. xfs_iunlock will
1754 * potentially push the tail if we were holding up the log.
1757 xfs_lock_dir_and_entry(
1759 xfs_inode_t
*ip
) /* inode of entry 'name' */
1763 xfs_inode_t
*ips
[2];
1772 xfs_ilock(dp
, XFS_ILOCK_EXCL
| XFS_ILOCK_PARENT
);
1779 * We want to lock in increasing inum. Since we've already
1780 * acquired the lock on the directory, we may need to release
1781 * if if the inum of the entry turns out to be less.
1783 if (e_inum
> dp
->i_ino
) {
1785 * We are already in the right order, so just
1786 * lock on the inode of the entry.
1787 * We need to use nowait if dp is in the AIL.
1790 lp
= (xfs_log_item_t
*)dp
->i_itemp
;
1791 if (lp
&& (lp
->li_flags
& XFS_LI_IN_AIL
)) {
1792 if (!xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
)) {
1799 * Unlock dp and try again.
1800 * xfs_iunlock will try to push the tail
1801 * if the inode is in the AIL.
1804 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
1806 if ((attempts
% 5) == 0) {
1807 delay(1); /* Don't just spin the CPU */
1809 xfs_rm_lock_delays
++;
1815 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1817 } else if (e_inum
< dp
->i_ino
) {
1818 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
1822 xfs_lock_inodes(ips
, 2, XFS_ILOCK_EXCL
);
1824 /* else e_inum == dp->i_ino */
1825 /* This can happen if we're asked to lock /x/..
1826 * the entry is "..", which is also the parent directory.
1834 int xfs_small_retries
;
1835 int xfs_middle_retries
;
1836 int xfs_lots_retries
;
1837 int xfs_lock_delays
;
1841 * Bump the subclass so xfs_lock_inodes() acquires each lock with
1845 xfs_lock_inumorder(int lock_mode
, int subclass
)
1847 if (lock_mode
& (XFS_IOLOCK_SHARED
|XFS_IOLOCK_EXCL
))
1848 lock_mode
|= (subclass
+ XFS_LOCK_INUMORDER
) << XFS_IOLOCK_SHIFT
;
1849 if (lock_mode
& (XFS_ILOCK_SHARED
|XFS_ILOCK_EXCL
))
1850 lock_mode
|= (subclass
+ XFS_LOCK_INUMORDER
) << XFS_ILOCK_SHIFT
;
1856 * The following routine will lock n inodes in exclusive mode.
1857 * We assume the caller calls us with the inodes in i_ino order.
1859 * We need to detect deadlock where an inode that we lock
1860 * is in the AIL and we start waiting for another inode that is locked
1861 * by a thread in a long running transaction (such as truncate). This can
1862 * result in deadlock since the long running trans might need to wait
1863 * for the inode we just locked in order to push the tail and free space
1872 int attempts
= 0, i
, j
, try_lock
;
1875 ASSERT(ips
&& (inodes
>= 2)); /* we need at least two */
1881 for (; i
< inodes
; i
++) {
1884 if (i
&& (ips
[i
] == ips
[i
-1])) /* Already locked */
1888 * If try_lock is not set yet, make sure all locked inodes
1889 * are not in the AIL.
1890 * If any are, set try_lock to be used later.
1894 for (j
= (i
- 1); j
>= 0 && !try_lock
; j
--) {
1895 lp
= (xfs_log_item_t
*)ips
[j
]->i_itemp
;
1896 if (lp
&& (lp
->li_flags
& XFS_LI_IN_AIL
)) {
1903 * If any of the previous locks we have locked is in the AIL,
1904 * we must TRY to get the second and subsequent locks. If
1905 * we can't get any, we must release all we have
1910 /* try_lock must be 0 if i is 0. */
1912 * try_lock means we have an inode locked
1913 * that is in the AIL.
1916 if (!xfs_ilock_nowait(ips
[i
], xfs_lock_inumorder(lock_mode
, i
))) {
1920 * Unlock all previous guys and try again.
1921 * xfs_iunlock will try to push the tail
1922 * if the inode is in the AIL.
1925 for(j
= i
- 1; j
>= 0; j
--) {
1928 * Check to see if we've already
1929 * unlocked this one.
1930 * Not the first one going back,
1931 * and the inode ptr is the same.
1933 if ((j
!= (i
- 1)) && ips
[j
] ==
1937 xfs_iunlock(ips
[j
], lock_mode
);
1940 if ((attempts
% 5) == 0) {
1941 delay(1); /* Don't just spin the CPU */
1951 xfs_ilock(ips
[i
], xfs_lock_inumorder(lock_mode
, i
));
1957 if (attempts
< 5) xfs_small_retries
++;
1958 else if (attempts
< 100) xfs_middle_retries
++;
1959 else xfs_lots_retries
++;
1969 struct xfs_name
*name
,
1972 xfs_mount_t
*mp
= dp
->i_mount
;
1973 xfs_trans_t
*tp
= NULL
;
1974 int is_dir
= S_ISDIR(ip
->i_d
.di_mode
);
1976 xfs_bmap_free_t free_list
;
1977 xfs_fsblock_t first_block
;
1984 xfs_itrace_entry(dp
);
1985 xfs_itrace_entry(ip
);
1987 if (XFS_FORCED_SHUTDOWN(mp
))
1988 return XFS_ERROR(EIO
);
1990 if (DM_EVENT_ENABLED(dp
, DM_EVENT_REMOVE
)) {
1991 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_REMOVE
, dp
, DM_RIGHT_NULL
,
1992 NULL
, DM_RIGHT_NULL
, name
->name
, NULL
,
1993 ip
->i_d
.di_mode
, 0, 0);
1998 error
= XFS_QM_DQATTACH(mp
, dp
, 0);
2002 error
= XFS_QM_DQATTACH(mp
, ip
, 0);
2007 tp
= xfs_trans_alloc(mp
, XFS_TRANS_RMDIR
);
2008 log_count
= XFS_DEFAULT_LOG_COUNT
;
2010 tp
= xfs_trans_alloc(mp
, XFS_TRANS_REMOVE
);
2011 log_count
= XFS_REMOVE_LOG_COUNT
;
2013 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2016 * We try to get the real space reservation first,
2017 * allowing for directory btree deletion(s) implying
2018 * possible bmap insert(s). If we can't get the space
2019 * reservation then we use 0 instead, and avoid the bmap
2020 * btree insert(s) in the directory code by, if the bmap
2021 * insert tries to happen, instead trimming the LAST
2022 * block from the directory.
2024 resblks
= XFS_REMOVE_SPACE_RES(mp
);
2025 error
= xfs_trans_reserve(tp
, resblks
, XFS_REMOVE_LOG_RES(mp
), 0,
2026 XFS_TRANS_PERM_LOG_RES
, log_count
);
2027 if (error
== ENOSPC
) {
2029 error
= xfs_trans_reserve(tp
, 0, XFS_REMOVE_LOG_RES(mp
), 0,
2030 XFS_TRANS_PERM_LOG_RES
, log_count
);
2033 ASSERT(error
!= ENOSPC
);
2035 goto out_trans_cancel
;
2038 error
= xfs_lock_dir_and_entry(dp
, ip
);
2040 goto out_trans_cancel
;
2043 * At this point, we've gotten both the directory and the entry
2047 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2050 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
2053 * If we're removing a directory perform some additional validation.
2056 ASSERT(ip
->i_d
.di_nlink
>= 2);
2057 if (ip
->i_d
.di_nlink
!= 2) {
2058 error
= XFS_ERROR(ENOTEMPTY
);
2059 goto out_trans_cancel
;
2061 if (!xfs_dir_isempty(ip
)) {
2062 error
= XFS_ERROR(ENOTEMPTY
);
2063 goto out_trans_cancel
;
2068 * Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
2070 XFS_BMAP_INIT(&free_list
, &first_block
);
2071 error
= xfs_dir_removename(tp
, dp
, name
, ip
->i_ino
,
2072 &first_block
, &free_list
, resblks
);
2074 ASSERT(error
!= ENOENT
);
2075 goto out_bmap_cancel
;
2077 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2080 * Bump the in memory generation count on the parent
2081 * directory so that other can know that it has changed.
2084 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
2088 * Drop the link from ip's "..".
2090 error
= xfs_droplink(tp
, dp
);
2092 goto out_bmap_cancel
;
2095 * Drop the link from dp to ip.
2097 error
= xfs_droplink(tp
, ip
);
2099 goto out_bmap_cancel
;
2102 * When removing a non-directory we need to log the parent
2103 * inode here for the i_gen update. For a directory this is
2104 * done implicitly by the xfs_droplink call for the ".." entry.
2106 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
2110 * Drop the "." link from ip to self.
2112 error
= xfs_droplink(tp
, ip
);
2114 goto out_bmap_cancel
;
2117 * Determine if this is the last link while
2118 * we are in the transaction.
2120 link_zero
= (ip
->i_d
.di_nlink
== 0);
2123 * If this is a synchronous mount, make sure that the
2124 * remove transaction goes to disk before returning to
2127 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
))
2128 xfs_trans_set_sync(tp
);
2130 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
2132 goto out_bmap_cancel
;
2134 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
2139 * If we are using filestreams, kill the stream association.
2140 * If the file is still open it may get a new one but that
2141 * will get killed on last close in xfs_close() so we don't
2142 * have to worry about that.
2144 if (!is_dir
&& link_zero
&& xfs_inode_is_filestream(ip
))
2145 xfs_filestream_deassociate(ip
);
2147 xfs_itrace_exit(ip
);
2148 xfs_itrace_exit(dp
);
2151 if (DM_EVENT_ENABLED(dp
, DM_EVENT_POSTREMOVE
)) {
2152 XFS_SEND_NAMESP(mp
, DM_EVENT_POSTREMOVE
, dp
, DM_RIGHT_NULL
,
2153 NULL
, DM_RIGHT_NULL
, name
->name
, NULL
,
2154 ip
->i_d
.di_mode
, error
, 0);
2160 xfs_bmap_cancel(&free_list
);
2161 cancel_flags
|= XFS_TRANS_ABORT
;
2163 xfs_trans_cancel(tp
, cancel_flags
);
2171 struct xfs_name
*target_name
)
2173 xfs_mount_t
*mp
= tdp
->i_mount
;
2175 xfs_inode_t
*ips
[2];
2177 xfs_bmap_free_t free_list
;
2178 xfs_fsblock_t first_block
;
2183 xfs_itrace_entry(tdp
);
2184 xfs_itrace_entry(sip
);
2186 ASSERT(!S_ISDIR(sip
->i_d
.di_mode
));
2188 if (XFS_FORCED_SHUTDOWN(mp
))
2189 return XFS_ERROR(EIO
);
2191 if (DM_EVENT_ENABLED(tdp
, DM_EVENT_LINK
)) {
2192 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_LINK
,
2195 target_name
->name
, NULL
, 0, 0, 0);
2200 /* Return through std_return after this point. */
2202 error
= XFS_QM_DQATTACH(mp
, sip
, 0);
2203 if (!error
&& sip
!= tdp
)
2204 error
= XFS_QM_DQATTACH(mp
, tdp
, 0);
2208 tp
= xfs_trans_alloc(mp
, XFS_TRANS_LINK
);
2209 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2210 resblks
= XFS_LINK_SPACE_RES(mp
, target_name
->len
);
2211 error
= xfs_trans_reserve(tp
, resblks
, XFS_LINK_LOG_RES(mp
), 0,
2212 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2213 if (error
== ENOSPC
) {
2215 error
= xfs_trans_reserve(tp
, 0, XFS_LINK_LOG_RES(mp
), 0,
2216 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2223 if (sip
->i_ino
< tdp
->i_ino
) {
2231 xfs_lock_inodes(ips
, 2, XFS_ILOCK_EXCL
);
2234 * Increment vnode ref counts since xfs_trans_commit &
2235 * xfs_trans_cancel will both unlock the inodes and
2236 * decrement the associated ref counts.
2240 xfs_trans_ijoin(tp
, sip
, XFS_ILOCK_EXCL
);
2241 xfs_trans_ijoin(tp
, tdp
, XFS_ILOCK_EXCL
);
2244 * If the source has too many links, we can't make any more to it.
2246 if (sip
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2247 error
= XFS_ERROR(EMLINK
);
2252 * If we are using project inheritance, we only allow hard link
2253 * creation in our tree when the project IDs are the same; else
2254 * the tree quota mechanism could be circumvented.
2256 if (unlikely((tdp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) &&
2257 (tdp
->i_d
.di_projid
!= sip
->i_d
.di_projid
))) {
2258 error
= XFS_ERROR(EXDEV
);
2262 error
= xfs_dir_canenter(tp
, tdp
, target_name
, resblks
);
2266 XFS_BMAP_INIT(&free_list
, &first_block
);
2268 error
= xfs_dir_createname(tp
, tdp
, target_name
, sip
->i_ino
,
2269 &first_block
, &free_list
, resblks
);
2272 xfs_ichgtime(tdp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2274 xfs_trans_log_inode(tp
, tdp
, XFS_ILOG_CORE
);
2276 error
= xfs_bumplink(tp
, sip
);
2281 * If this is a synchronous mount, make sure that the
2282 * link transaction goes to disk before returning to
2285 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2286 xfs_trans_set_sync(tp
);
2289 error
= xfs_bmap_finish (&tp
, &free_list
, &committed
);
2291 xfs_bmap_cancel(&free_list
);
2295 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
2299 /* Fall through to std_return with error = 0. */
2301 if (DM_EVENT_ENABLED(sip
, DM_EVENT_POSTLINK
)) {
2302 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTLINK
,
2305 target_name
->name
, NULL
, 0, error
, 0);
2310 cancel_flags
|= XFS_TRANS_ABORT
;
2314 xfs_trans_cancel(tp
, cancel_flags
);
2322 struct xfs_name
*dir_name
,
2327 xfs_mount_t
*mp
= dp
->i_mount
;
2328 xfs_inode_t
*cdp
; /* inode of created dir */
2333 xfs_bmap_free_t free_list
;
2334 xfs_fsblock_t first_block
;
2335 boolean_t unlock_dp_on_error
= B_FALSE
;
2336 boolean_t created
= B_FALSE
;
2337 int dm_event_sent
= 0;
2339 struct xfs_dquot
*udqp
, *gdqp
;
2342 if (XFS_FORCED_SHUTDOWN(mp
))
2343 return XFS_ERROR(EIO
);
2347 if (DM_EVENT_ENABLED(dp
, DM_EVENT_CREATE
)) {
2348 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
2349 dp
, DM_RIGHT_NULL
, NULL
,
2350 DM_RIGHT_NULL
, dir_name
->name
, NULL
,
2357 /* Return through std_return after this point. */
2359 xfs_itrace_entry(dp
);
2363 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
2364 prid
= dp
->i_d
.di_projid
;
2366 prid
= (xfs_prid_t
)dfltprid
;
2369 * Make sure that we have allocated dquot(s) on disk.
2371 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
2372 current_fsuid(credp
), current_fsgid(credp
), prid
,
2373 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
2377 tp
= xfs_trans_alloc(mp
, XFS_TRANS_MKDIR
);
2378 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2379 resblks
= XFS_MKDIR_SPACE_RES(mp
, dir_name
->len
);
2380 error
= xfs_trans_reserve(tp
, resblks
, XFS_MKDIR_LOG_RES(mp
), 0,
2381 XFS_TRANS_PERM_LOG_RES
, XFS_MKDIR_LOG_COUNT
);
2382 if (error
== ENOSPC
) {
2384 error
= xfs_trans_reserve(tp
, 0, XFS_MKDIR_LOG_RES(mp
), 0,
2385 XFS_TRANS_PERM_LOG_RES
,
2386 XFS_MKDIR_LOG_COUNT
);
2393 xfs_ilock(dp
, XFS_ILOCK_EXCL
| XFS_ILOCK_PARENT
);
2394 unlock_dp_on_error
= B_TRUE
;
2397 * Check for directory link count overflow.
2399 if (dp
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2400 error
= XFS_ERROR(EMLINK
);
2405 * Reserve disk quota and the inode.
2407 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
2411 error
= xfs_dir_canenter(tp
, dp
, dir_name
, resblks
);
2415 * create the directory inode.
2417 error
= xfs_dir_ialloc(&tp
, dp
, mode
, 2,
2418 0, credp
, prid
, resblks
> 0,
2421 if (error
== ENOSPC
)
2425 xfs_itrace_ref(cdp
);
2428 * Now we add the directory inode to the transaction.
2429 * We waited until now since xfs_dir_ialloc might start
2430 * a new transaction. Had we joined the transaction
2431 * earlier, the locks might have gotten released. An error
2432 * from here on will result in the transaction cancel
2433 * unlocking dp so don't do it explicitly in the error path.
2436 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2437 unlock_dp_on_error
= B_FALSE
;
2439 XFS_BMAP_INIT(&free_list
, &first_block
);
2441 error
= xfs_dir_createname(tp
, dp
, dir_name
, cdp
->i_ino
,
2442 &first_block
, &free_list
, resblks
?
2443 resblks
- XFS_IALLOC_SPACE_RES(mp
) : 0);
2445 ASSERT(error
!= ENOSPC
);
2448 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2451 * Bump the in memory version number of the parent directory
2452 * so that other processes accessing it will recognize that
2453 * the directory has changed.
2457 error
= xfs_dir_init(tp
, cdp
, dp
);
2462 error
= xfs_bumplink(tp
, dp
);
2472 * Attach the dquots to the new inode and modify the icount incore.
2474 XFS_QM_DQVOPCREATE(mp
, tp
, cdp
, udqp
, gdqp
);
2477 * If this is a synchronous mount, make sure that the
2478 * mkdir transaction goes to disk before returning to
2481 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2482 xfs_trans_set_sync(tp
);
2485 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
2491 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
2492 XFS_QM_DQRELE(mp
, udqp
);
2493 XFS_QM_DQRELE(mp
, gdqp
);
2498 /* Fall through to std_return with error = 0 or errno from
2499 * xfs_trans_commit. */
2502 if ((created
|| (error
!= 0 && dm_event_sent
!= 0)) &&
2503 DM_EVENT_ENABLED(dp
, DM_EVENT_POSTCREATE
)) {
2504 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTCREATE
,
2506 created
? cdp
: NULL
,
2508 dir_name
->name
, NULL
,
2515 xfs_bmap_cancel(&free_list
);
2517 cancel_flags
|= XFS_TRANS_ABORT
;
2519 xfs_trans_cancel(tp
, cancel_flags
);
2520 XFS_QM_DQRELE(mp
, udqp
);
2521 XFS_QM_DQRELE(mp
, gdqp
);
2523 if (unlock_dp_on_error
)
2524 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2532 struct xfs_name
*link_name
,
2533 const char *target_path
,
2538 xfs_mount_t
*mp
= dp
->i_mount
;
2543 xfs_bmap_free_t free_list
;
2544 xfs_fsblock_t first_block
;
2545 boolean_t unlock_dp_on_error
= B_FALSE
;
2548 xfs_fileoff_t first_fsb
;
2549 xfs_filblks_t fs_blocks
;
2551 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
2553 const char *cur_chunk
;
2558 struct xfs_dquot
*udqp
, *gdqp
;
2566 xfs_itrace_entry(dp
);
2568 if (XFS_FORCED_SHUTDOWN(mp
))
2569 return XFS_ERROR(EIO
);
2572 * Check component lengths of the target path name.
2574 pathlen
= strlen(target_path
);
2575 if (pathlen
>= MAXPATHLEN
) /* total string too long */
2576 return XFS_ERROR(ENAMETOOLONG
);
2578 if (DM_EVENT_ENABLED(dp
, DM_EVENT_SYMLINK
)) {
2579 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_SYMLINK
, dp
,
2580 DM_RIGHT_NULL
, NULL
, DM_RIGHT_NULL
,
2581 link_name
->name
, target_path
, 0, 0, 0);
2586 /* Return through std_return after this point. */
2589 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
2590 prid
= dp
->i_d
.di_projid
;
2592 prid
= (xfs_prid_t
)dfltprid
;
2595 * Make sure that we have allocated dquot(s) on disk.
2597 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
2598 current_fsuid(credp
), current_fsgid(credp
), prid
,
2599 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
2603 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SYMLINK
);
2604 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2606 * The symlink will fit into the inode data fork?
2607 * There can't be any attributes so we get the whole variable part.
2609 if (pathlen
<= XFS_LITINO(mp
))
2612 fs_blocks
= XFS_B_TO_FSB(mp
, pathlen
);
2613 resblks
= XFS_SYMLINK_SPACE_RES(mp
, link_name
->len
, fs_blocks
);
2614 error
= xfs_trans_reserve(tp
, resblks
, XFS_SYMLINK_LOG_RES(mp
), 0,
2615 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
2616 if (error
== ENOSPC
&& fs_blocks
== 0) {
2618 error
= xfs_trans_reserve(tp
, 0, XFS_SYMLINK_LOG_RES(mp
), 0,
2619 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
2626 xfs_ilock(dp
, XFS_ILOCK_EXCL
| XFS_ILOCK_PARENT
);
2627 unlock_dp_on_error
= B_TRUE
;
2630 * Check whether the directory allows new symlinks or not.
2632 if (dp
->i_d
.di_flags
& XFS_DIFLAG_NOSYMLINKS
) {
2633 error
= XFS_ERROR(EPERM
);
2638 * Reserve disk quota : blocks and inode.
2640 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
2645 * Check for ability to enter directory entry, if no space reserved.
2647 error
= xfs_dir_canenter(tp
, dp
, link_name
, resblks
);
2651 * Initialize the bmap freelist prior to calling either
2652 * bmapi or the directory create code.
2654 XFS_BMAP_INIT(&free_list
, &first_block
);
2657 * Allocate an inode for the symlink.
2659 error
= xfs_dir_ialloc(&tp
, dp
, S_IFLNK
| (mode
& ~S_IFMT
),
2660 1, 0, credp
, prid
, resblks
> 0, &ip
, NULL
);
2662 if (error
== ENOSPC
)
2669 * An error after we've joined dp to the transaction will result in the
2670 * transaction cancel unlocking dp so don't do it explicitly in the
2674 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2675 unlock_dp_on_error
= B_FALSE
;
2678 * Also attach the dquot(s) to it, if applicable.
2680 XFS_QM_DQVOPCREATE(mp
, tp
, ip
, udqp
, gdqp
);
2683 resblks
-= XFS_IALLOC_SPACE_RES(mp
);
2685 * If the symlink will fit into the inode, write it inline.
2687 if (pathlen
<= XFS_IFORK_DSIZE(ip
)) {
2688 xfs_idata_realloc(ip
, pathlen
, XFS_DATA_FORK
);
2689 memcpy(ip
->i_df
.if_u1
.if_data
, target_path
, pathlen
);
2690 ip
->i_d
.di_size
= pathlen
;
2693 * The inode was initially created in extent format.
2695 ip
->i_df
.if_flags
&= ~(XFS_IFEXTENTS
| XFS_IFBROOT
);
2696 ip
->i_df
.if_flags
|= XFS_IFINLINE
;
2698 ip
->i_d
.di_format
= XFS_DINODE_FMT_LOCAL
;
2699 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_DDATA
| XFS_ILOG_CORE
);
2703 nmaps
= SYMLINK_MAPS
;
2705 error
= xfs_bmapi(tp
, ip
, first_fsb
, fs_blocks
,
2706 XFS_BMAPI_WRITE
| XFS_BMAPI_METADATA
,
2707 &first_block
, resblks
, mval
, &nmaps
,
2714 resblks
-= fs_blocks
;
2715 ip
->i_d
.di_size
= pathlen
;
2716 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
2718 cur_chunk
= target_path
;
2719 for (n
= 0; n
< nmaps
; n
++) {
2720 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
2721 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
2722 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
, d
,
2723 BTOBB(byte_cnt
), 0);
2724 ASSERT(bp
&& !XFS_BUF_GETERROR(bp
));
2725 if (pathlen
< byte_cnt
) {
2728 pathlen
-= byte_cnt
;
2730 memcpy(XFS_BUF_PTR(bp
), cur_chunk
, byte_cnt
);
2731 cur_chunk
+= byte_cnt
;
2733 xfs_trans_log_buf(tp
, bp
, 0, byte_cnt
- 1);
2738 * Create the directory entry for the symlink.
2740 error
= xfs_dir_createname(tp
, dp
, link_name
, ip
->i_ino
,
2741 &first_block
, &free_list
, resblks
);
2744 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2745 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
2748 * Bump the in memory version number of the parent directory
2749 * so that other processes accessing it will recognize that
2750 * the directory has changed.
2755 * If this is a synchronous mount, make sure that the
2756 * symlink transaction goes to disk before returning to
2759 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2760 xfs_trans_set_sync(tp
);
2764 * xfs_trans_commit normally decrements the vnode ref count
2765 * when it unlocks the inode. Since we want to return the
2766 * vnode to the caller, we bump the vnode ref count now.
2770 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
2774 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
2775 XFS_QM_DQRELE(mp
, udqp
);
2776 XFS_QM_DQRELE(mp
, gdqp
);
2778 /* Fall through to std_return with error = 0 or errno from
2779 * xfs_trans_commit */
2781 if (DM_EVENT_ENABLED(dp
, DM_EVENT_POSTSYMLINK
)) {
2782 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTSYMLINK
,
2785 DM_RIGHT_NULL
, link_name
->name
,
2786 target_path
, 0, error
, 0);
2796 xfs_bmap_cancel(&free_list
);
2797 cancel_flags
|= XFS_TRANS_ABORT
;
2799 xfs_trans_cancel(tp
, cancel_flags
);
2800 XFS_QM_DQRELE(mp
, udqp
);
2801 XFS_QM_DQRELE(mp
, gdqp
);
2803 if (unlock_dp_on_error
)
2804 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2814 xfs_mount_t
*mp
= ip
->i_mount
;
2817 if (XFS_FORCED_SHUTDOWN(mp
))
2818 return XFS_ERROR(EIO
);
2821 * Bypass inodes which have already been cleaned by
2822 * the inode flush clustering code inside xfs_iflush
2824 if (xfs_inode_clean(ip
))
2828 * We make this non-blocking if the inode is contended,
2829 * return EAGAIN to indicate to the caller that they
2830 * did not succeed. This prevents the flush path from
2831 * blocking on inodes inside another operation right
2832 * now, they get caught later by xfs_sync.
2834 if (flags
& FLUSH_SYNC
) {
2835 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
2837 } else if (xfs_ilock_nowait(ip
, XFS_ILOCK_SHARED
)) {
2838 if (xfs_ipincount(ip
) || !xfs_iflock_nowait(ip
)) {
2839 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
2846 error
= xfs_iflush(ip
, (flags
& FLUSH_SYNC
) ? XFS_IFLUSH_SYNC
2847 : XFS_IFLUSH_ASYNC_NOBLOCK
);
2848 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
2860 xfs_mount_t
*mp
= ip
->i_mount
;
2864 if (!capable(CAP_SYS_ADMIN
))
2865 return XFS_ERROR(EPERM
);
2867 if (XFS_FORCED_SHUTDOWN(mp
))
2868 return XFS_ERROR(EIO
);
2870 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SET_DMATTRS
);
2871 error
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES (mp
), 0, 0, 0);
2873 xfs_trans_cancel(tp
, 0);
2876 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
2877 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
2879 ip
->i_d
.di_dmevmask
= evmask
;
2880 ip
->i_d
.di_dmstate
= state
;
2882 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
2884 error
= xfs_trans_commit(tp
, 0);
2893 bhv_vnode_t
*vp
= XFS_ITOV(ip
);
2895 xfs_itrace_entry(ip
);
2897 ASSERT(!VN_MAPPED(vp
));
2899 /* bad inode, get out here ASAP */
2907 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
2910 * Make sure the atime in the XFS inode is correct before freeing the
2913 xfs_synchronize_atime(ip
);
2916 * If we have nothing to flush with this inode then complete the
2917 * teardown now, otherwise break the link between the xfs inode and the
2918 * linux inode and clean up the xfs inode later. This avoids flushing
2919 * the inode to disk during the delete operation itself.
2921 * When breaking the link, we need to set the XFS_IRECLAIMABLE flag
2922 * first to ensure that xfs_iunpin() will never see an xfs inode
2923 * that has a linux inode being reclaimed. Synchronisation is provided
2924 * by the i_flags_lock.
2926 if (!ip
->i_update_core
&& (ip
->i_itemp
== NULL
)) {
2927 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
2929 return xfs_finish_reclaim(ip
, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC
);
2931 xfs_mount_t
*mp
= ip
->i_mount
;
2933 /* Protect sync and unpin from us */
2934 XFS_MOUNT_ILOCK(mp
);
2935 spin_lock(&ip
->i_flags_lock
);
2936 __xfs_iflags_set(ip
, XFS_IRECLAIMABLE
);
2937 vn_to_inode(vp
)->i_private
= NULL
;
2939 spin_unlock(&ip
->i_flags_lock
);
2940 list_add_tail(&ip
->i_reclaim
, &mp
->m_del_inodes
);
2941 XFS_MOUNT_IUNLOCK(mp
);
2952 xfs_perag_t
*pag
= xfs_get_perag(ip
->i_mount
, ip
->i_ino
);
2953 bhv_vnode_t
*vp
= XFS_ITOV_NULL(ip
);
2955 if (vp
&& VN_BAD(vp
))
2958 /* The hash lock here protects a thread in xfs_iget_core from
2959 * racing with us on linking the inode back with a vnode.
2960 * Once we have the XFS_IRECLAIM flag set it will not touch
2963 write_lock(&pag
->pag_ici_lock
);
2964 spin_lock(&ip
->i_flags_lock
);
2965 if (__xfs_iflags_test(ip
, XFS_IRECLAIM
) ||
2966 (!__xfs_iflags_test(ip
, XFS_IRECLAIMABLE
) && vp
== NULL
)) {
2967 spin_unlock(&ip
->i_flags_lock
);
2968 write_unlock(&pag
->pag_ici_lock
);
2971 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
2975 __xfs_iflags_set(ip
, XFS_IRECLAIM
);
2976 spin_unlock(&ip
->i_flags_lock
);
2977 write_unlock(&pag
->pag_ici_lock
);
2978 xfs_put_perag(ip
->i_mount
, pag
);
2981 * If the inode is still dirty, then flush it out. If the inode
2982 * is not in the AIL, then it will be OK to flush it delwri as
2983 * long as xfs_iflush() does not keep any references to the inode.
2984 * We leave that decision up to xfs_iflush() since it has the
2985 * knowledge of whether it's OK to simply do a delwri flush of
2986 * the inode or whether we need to wait until the inode is
2987 * pulled from the AIL.
2988 * We get the flush lock regardless, though, just to make sure
2989 * we don't free it while it is being flushed.
2992 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
2997 * In the case of a forced shutdown we rely on xfs_iflush() to
2998 * wait for the inode to be unpinned before returning an error.
3000 if (xfs_iflush(ip
, sync_mode
) == 0) {
3001 /* synchronize with xfs_iflush_done */
3006 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3014 xfs_finish_reclaim_all(xfs_mount_t
*mp
, int noblock
)
3017 xfs_inode_t
*ip
, *n
;
3022 XFS_MOUNT_ILOCK(mp
);
3023 list_for_each_entry_safe(ip
, n
, &mp
->m_del_inodes
, i_reclaim
) {
3025 if (xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
) == 0)
3027 if (xfs_ipincount(ip
) ||
3028 !xfs_iflock_nowait(ip
)) {
3029 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3033 XFS_MOUNT_IUNLOCK(mp
);
3034 if (xfs_finish_reclaim(ip
, noblock
,
3035 XFS_IFLUSH_DELWRI_ELSE_ASYNC
))
3044 XFS_MOUNT_IUNLOCK(mp
);
3049 * xfs_alloc_file_space()
3050 * This routine allocates disk space for the given file.
3052 * If alloc_type == 0, this request is for an ALLOCSP type
3053 * request which will change the file size. In this case, no
3054 * DMAPI event will be generated by the call. A TRUNCATE event
3055 * will be generated later by xfs_setattr.
3057 * If alloc_type != 0, this request is for a RESVSP type
3058 * request, and a DMAPI DM_EVENT_WRITE will be generated if the
3059 * lower block boundary byte address is less than the file's
3068 xfs_alloc_file_space(
3075 xfs_mount_t
*mp
= ip
->i_mount
;
3077 xfs_filblks_t allocated_fsb
;
3078 xfs_filblks_t allocatesize_fsb
;
3079 xfs_extlen_t extsz
, temp
;
3080 xfs_fileoff_t startoffset_fsb
;
3081 xfs_fsblock_t firstfsb
;
3087 xfs_bmbt_irec_t imaps
[1], *imapp
;
3088 xfs_bmap_free_t free_list
;
3089 uint qblocks
, resblks
, resrtextents
;
3093 xfs_itrace_entry(ip
);
3095 if (XFS_FORCED_SHUTDOWN(mp
))
3096 return XFS_ERROR(EIO
);
3098 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
3102 return XFS_ERROR(EINVAL
);
3104 rt
= XFS_IS_REALTIME_INODE(ip
);
3105 extsz
= xfs_get_extsz_hint(ip
);
3110 bmapi_flag
= XFS_BMAPI_WRITE
| (alloc_type
? XFS_BMAPI_PREALLOC
: 0);
3111 startoffset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
3112 allocatesize_fsb
= XFS_B_TO_FSB(mp
, count
);
3114 /* Generate a DMAPI event if needed. */
3115 if (alloc_type
!= 0 && offset
< ip
->i_size
&&
3116 (attr_flags
&ATTR_DMI
) == 0 &&
3117 DM_EVENT_ENABLED(ip
, DM_EVENT_WRITE
)) {
3118 xfs_off_t end_dmi_offset
;
3120 end_dmi_offset
= offset
+len
;
3121 if (end_dmi_offset
> ip
->i_size
)
3122 end_dmi_offset
= ip
->i_size
;
3123 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, ip
, offset
,
3124 end_dmi_offset
- offset
, 0, NULL
);
3130 * Allocate file space until done or until there is an error
3133 while (allocatesize_fsb
&& !error
) {
3137 * Determine space reservations for data/realtime.
3139 if (unlikely(extsz
)) {
3140 s
= startoffset_fsb
;
3143 e
= startoffset_fsb
+ allocatesize_fsb
;
3144 if ((temp
= do_mod(startoffset_fsb
, extsz
)))
3146 if ((temp
= do_mod(e
, extsz
)))
3150 e
= allocatesize_fsb
;
3154 resrtextents
= qblocks
= (uint
)(e
- s
);
3155 resrtextents
/= mp
->m_sb
.sb_rextsize
;
3156 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, 0);
3157 quota_flag
= XFS_QMOPT_RES_RTBLKS
;
3160 resblks
= qblocks
= \
3161 XFS_DIOSTRAT_SPACE_RES(mp
, (uint
)(e
- s
));
3162 quota_flag
= XFS_QMOPT_RES_REGBLKS
;
3166 * Allocate and setup the transaction.
3168 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
3169 error
= xfs_trans_reserve(tp
, resblks
,
3170 XFS_WRITE_LOG_RES(mp
), resrtextents
,
3171 XFS_TRANS_PERM_LOG_RES
,
3172 XFS_WRITE_LOG_COUNT
);
3174 * Check for running out of space
3178 * Free the transaction structure.
3180 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
3181 xfs_trans_cancel(tp
, 0);
3184 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3185 error
= XFS_TRANS_RESERVE_QUOTA_NBLKS(mp
, tp
, ip
,
3186 qblocks
, 0, quota_flag
);
3190 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3191 xfs_trans_ihold(tp
, ip
);
3194 * Issue the xfs_bmapi() call to allocate the blocks
3196 XFS_BMAP_INIT(&free_list
, &firstfsb
);
3197 error
= xfs_bmapi(tp
, ip
, startoffset_fsb
,
3198 allocatesize_fsb
, bmapi_flag
,
3199 &firstfsb
, 0, imapp
, &nimaps
,
3206 * Complete the transaction
3208 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
3213 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
3214 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3219 allocated_fsb
= imapp
->br_blockcount
;
3222 error
= XFS_ERROR(ENOSPC
);
3226 startoffset_fsb
+= allocated_fsb
;
3227 allocatesize_fsb
-= allocated_fsb
;
3230 if (error
== ENOSPC
&& (attr_flags
& ATTR_DMI
) == 0 &&
3231 DM_EVENT_ENABLED(ip
, DM_EVENT_NOSPACE
)) {
3232 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_NOSPACE
,
3235 NULL
, NULL
, 0, 0, 0); /* Delay flag intentionally unused */
3237 goto retry
; /* Maybe DMAPI app. has made space */
3238 /* else fall through with error from XFS_SEND_DATA */
3243 error0
: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */
3244 xfs_bmap_cancel(&free_list
);
3245 XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp
, tp
, ip
, qblocks
, 0, quota_flag
);
3247 error1
: /* Just cancel transaction */
3248 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
3249 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3250 goto dmapi_enospc_check
;
3254 * Zero file bytes between startoff and endoff inclusive.
3255 * The iolock is held exclusive and no blocks are buffered.
3258 xfs_zero_remaining_bytes(
3263 xfs_bmbt_irec_t imap
;
3264 xfs_fileoff_t offset_fsb
;
3265 xfs_off_t lastoffset
;
3268 xfs_mount_t
*mp
= ip
->i_mount
;
3272 bp
= xfs_buf_get_noaddr(mp
->m_sb
.sb_blocksize
,
3273 XFS_IS_REALTIME_INODE(ip
) ?
3274 mp
->m_rtdev_targp
: mp
->m_ddev_targp
);
3276 for (offset
= startoff
; offset
<= endoff
; offset
= lastoffset
+ 1) {
3277 offset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
3279 error
= xfs_bmapi(NULL
, ip
, offset_fsb
, 1, 0,
3280 NULL
, 0, &imap
, &nimap
, NULL
, NULL
);
3281 if (error
|| nimap
< 1)
3283 ASSERT(imap
.br_blockcount
>= 1);
3284 ASSERT(imap
.br_startoff
== offset_fsb
);
3285 lastoffset
= XFS_FSB_TO_B(mp
, imap
.br_startoff
+ 1) - 1;
3286 if (lastoffset
> endoff
)
3287 lastoffset
= endoff
;
3288 if (imap
.br_startblock
== HOLESTARTBLOCK
)
3290 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
3291 if (imap
.br_state
== XFS_EXT_UNWRITTEN
)
3294 XFS_BUF_UNWRITE(bp
);
3296 XFS_BUF_SET_ADDR(bp
, XFS_FSB_TO_DB(ip
, imap
.br_startblock
));
3298 error
= xfs_iowait(bp
);
3300 xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
3301 mp
, bp
, XFS_BUF_ADDR(bp
));
3304 memset(XFS_BUF_PTR(bp
) +
3305 (offset
- XFS_FSB_TO_B(mp
, imap
.br_startoff
)),
3306 0, lastoffset
- offset
+ 1);
3311 error
= xfs_iowait(bp
);
3313 xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
3314 mp
, bp
, XFS_BUF_ADDR(bp
));
3323 * xfs_free_file_space()
3324 * This routine frees disk space for the given file.
3326 * This routine is only called by xfs_change_file_space
3327 * for an UNRESVSP type call.
3335 xfs_free_file_space(
3344 xfs_off_t end_dmi_offset
;
3345 xfs_fileoff_t endoffset_fsb
;
3347 xfs_fsblock_t firstfsb
;
3348 xfs_bmap_free_t free_list
;
3349 xfs_bmbt_irec_t imap
;
3357 xfs_fileoff_t startoffset_fsb
;
3359 int need_iolock
= 1;
3364 xfs_itrace_entry(ip
);
3366 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
3370 if (len
<= 0) /* if nothing being freed */
3372 rt
= XFS_IS_REALTIME_INODE(ip
);
3373 startoffset_fsb
= XFS_B_TO_FSB(mp
, offset
);
3374 end_dmi_offset
= offset
+ len
;
3375 endoffset_fsb
= XFS_B_TO_FSBT(mp
, end_dmi_offset
);
3377 if (offset
< ip
->i_size
&& (attr_flags
& ATTR_DMI
) == 0 &&
3378 DM_EVENT_ENABLED(ip
, DM_EVENT_WRITE
)) {
3379 if (end_dmi_offset
> ip
->i_size
)
3380 end_dmi_offset
= ip
->i_size
;
3381 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, ip
,
3382 offset
, end_dmi_offset
- offset
,
3383 AT_DELAY_FLAG(attr_flags
), NULL
);
3388 if (attr_flags
& ATTR_NOLOCK
)
3391 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
3392 vn_iowait(ip
); /* wait for the completion of any pending DIOs */
3395 rounding
= max_t(uint
, 1 << mp
->m_sb
.sb_blocklog
, PAGE_CACHE_SIZE
);
3396 ioffset
= offset
& ~(rounding
- 1);
3398 if (VN_CACHED(vp
) != 0) {
3399 xfs_inval_cached_trace(ip
, ioffset
, -1, ioffset
, -1);
3400 error
= xfs_flushinval_pages(ip
, ioffset
, -1, FI_REMAPF_LOCKED
);
3402 goto out_unlock_iolock
;
3406 * Need to zero the stuff we're not freeing, on disk.
3407 * If its a realtime file & can't use unwritten extents then we
3408 * actually need to zero the extent edges. Otherwise xfs_bunmapi
3409 * will take care of it for us.
3411 if (rt
&& !xfs_sb_version_hasextflgbit(&mp
->m_sb
)) {
3413 error
= xfs_bmapi(NULL
, ip
, startoffset_fsb
,
3414 1, 0, NULL
, 0, &imap
, &nimap
, NULL
, NULL
);
3416 goto out_unlock_iolock
;
3417 ASSERT(nimap
== 0 || nimap
== 1);
3418 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
3421 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
3422 block
= imap
.br_startblock
;
3423 mod
= do_div(block
, mp
->m_sb
.sb_rextsize
);
3425 startoffset_fsb
+= mp
->m_sb
.sb_rextsize
- mod
;
3428 error
= xfs_bmapi(NULL
, ip
, endoffset_fsb
- 1,
3429 1, 0, NULL
, 0, &imap
, &nimap
, NULL
, NULL
);
3431 goto out_unlock_iolock
;
3432 ASSERT(nimap
== 0 || nimap
== 1);
3433 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
3434 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
3436 if (mod
&& (mod
!= mp
->m_sb
.sb_rextsize
))
3437 endoffset_fsb
-= mod
;
3440 if ((done
= (endoffset_fsb
<= startoffset_fsb
)))
3442 * One contiguous piece to clear
3444 error
= xfs_zero_remaining_bytes(ip
, offset
, offset
+ len
- 1);
3447 * Some full blocks, possibly two pieces to clear
3449 if (offset
< XFS_FSB_TO_B(mp
, startoffset_fsb
))
3450 error
= xfs_zero_remaining_bytes(ip
, offset
,
3451 XFS_FSB_TO_B(mp
, startoffset_fsb
) - 1);
3453 XFS_FSB_TO_B(mp
, endoffset_fsb
) < offset
+ len
)
3454 error
= xfs_zero_remaining_bytes(ip
,
3455 XFS_FSB_TO_B(mp
, endoffset_fsb
),
3460 * free file space until done or until there is an error
3462 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, 0);
3463 while (!error
&& !done
) {
3466 * allocate and setup the transaction. Allow this
3467 * transaction to dip into the reserve blocks to ensure
3468 * the freeing of the space succeeds at ENOSPC.
3470 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
3471 tp
->t_flags
|= XFS_TRANS_RESERVE
;
3472 error
= xfs_trans_reserve(tp
,
3474 XFS_WRITE_LOG_RES(mp
),
3476 XFS_TRANS_PERM_LOG_RES
,
3477 XFS_WRITE_LOG_COUNT
);
3480 * check for running out of space
3484 * Free the transaction structure.
3486 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
3487 xfs_trans_cancel(tp
, 0);
3490 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3491 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
,
3492 ip
->i_udquot
, ip
->i_gdquot
, resblks
, 0,
3493 XFS_QMOPT_RES_REGBLKS
);
3497 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3498 xfs_trans_ihold(tp
, ip
);
3501 * issue the bunmapi() call to free the blocks
3503 XFS_BMAP_INIT(&free_list
, &firstfsb
);
3504 error
= xfs_bunmapi(tp
, ip
, startoffset_fsb
,
3505 endoffset_fsb
- startoffset_fsb
,
3506 0, 2, &firstfsb
, &free_list
, NULL
, &done
);
3512 * complete the transaction
3514 error
= xfs_bmap_finish(&tp
, &free_list
, &committed
);
3519 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
3520 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3525 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
3529 xfs_bmap_cancel(&free_list
);
3531 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
3532 xfs_iunlock(ip
, need_iolock
? (XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
) :
3538 * xfs_change_file_space()
3539 * This routine allocates or frees disk space for the given file.
3540 * The user specified parameters are checked for alignment and size
3549 xfs_change_file_space(
3557 xfs_mount_t
*mp
= ip
->i_mount
;
3562 xfs_off_t startoffset
;
3567 xfs_itrace_entry(ip
);
3569 if (!S_ISREG(ip
->i_d
.di_mode
))
3570 return XFS_ERROR(EINVAL
);
3572 switch (bf
->l_whence
) {
3573 case 0: /*SEEK_SET*/
3575 case 1: /*SEEK_CUR*/
3576 bf
->l_start
+= offset
;
3578 case 2: /*SEEK_END*/
3579 bf
->l_start
+= ip
->i_size
;
3582 return XFS_ERROR(EINVAL
);
3585 llen
= bf
->l_len
> 0 ? bf
->l_len
- 1 : bf
->l_len
;
3587 if ( (bf
->l_start
< 0)
3588 || (bf
->l_start
> XFS_MAXIOFFSET(mp
))
3589 || (bf
->l_start
+ llen
< 0)
3590 || (bf
->l_start
+ llen
> XFS_MAXIOFFSET(mp
)))
3591 return XFS_ERROR(EINVAL
);
3595 startoffset
= bf
->l_start
;
3599 * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
3601 * These calls do NOT zero the data space allocated to the file,
3602 * nor do they change the file size.
3604 * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
3606 * These calls cause the new file data to be zeroed and the file
3607 * size to be changed.
3609 setprealloc
= clrprealloc
= 0;
3612 case XFS_IOC_RESVSP
:
3613 case XFS_IOC_RESVSP64
:
3614 error
= xfs_alloc_file_space(ip
, startoffset
, bf
->l_len
,
3621 case XFS_IOC_UNRESVSP
:
3622 case XFS_IOC_UNRESVSP64
:
3623 if ((error
= xfs_free_file_space(ip
, startoffset
, bf
->l_len
,
3628 case XFS_IOC_ALLOCSP
:
3629 case XFS_IOC_ALLOCSP64
:
3630 case XFS_IOC_FREESP
:
3631 case XFS_IOC_FREESP64
:
3632 if (startoffset
> fsize
) {
3633 error
= xfs_alloc_file_space(ip
, fsize
,
3634 startoffset
- fsize
, 0, attr_flags
);
3639 va
.va_mask
= XFS_AT_SIZE
;
3640 va
.va_size
= startoffset
;
3642 error
= xfs_setattr(ip
, &va
, attr_flags
, credp
);
3652 return XFS_ERROR(EINVAL
);
3656 * update the inode timestamp, mode, and prealloc flag bits
3658 tp
= xfs_trans_alloc(mp
, XFS_TRANS_WRITEID
);
3660 if ((error
= xfs_trans_reserve(tp
, 0, XFS_WRITEID_LOG_RES(mp
),
3663 xfs_trans_cancel(tp
, 0);
3667 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3669 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3670 xfs_trans_ihold(tp
, ip
);
3672 if ((attr_flags
& ATTR_DMI
) == 0) {
3673 ip
->i_d
.di_mode
&= ~S_ISUID
;
3676 * Note that we don't have to worry about mandatory
3677 * file locking being disabled here because we only
3678 * clear the S_ISGID bit if the Group execute bit is
3679 * on, but if it was on then mandatory locking wouldn't
3680 * have been enabled.
3682 if (ip
->i_d
.di_mode
& S_IXGRP
)
3683 ip
->i_d
.di_mode
&= ~S_ISGID
;
3685 xfs_ichgtime(ip
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
3688 ip
->i_d
.di_flags
|= XFS_DIFLAG_PREALLOC
;
3689 else if (clrprealloc
)
3690 ip
->i_d
.di_flags
&= ~XFS_DIFLAG_PREALLOC
;
3692 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
3693 xfs_trans_set_sync(tp
);
3695 error
= xfs_trans_commit(tp
, 0);
3697 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);