2 * Copyright (c) 2000-2005 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
20 #include "xfs_types.h"
24 #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_dir_sf.h"
36 #include "xfs_dir2_sf.h"
37 #include "xfs_attr_sf.h"
38 #include "xfs_dinode.h"
39 #include "xfs_inode.h"
40 #include "xfs_inode_item.h"
41 #include "xfs_dir_leaf.h"
42 #include "xfs_itable.h"
43 #include "xfs_btree.h"
44 #include "xfs_ialloc.h"
45 #include "xfs_alloc.h"
49 #include "xfs_error.h"
50 #include "xfs_quota.h"
51 #include "xfs_utils.h"
52 #include "xfs_rtalloc.h"
53 #include "xfs_refcache.h"
54 #include "xfs_trans_space.h"
55 #include "xfs_log_priv.h"
60 * The maximum pathlen is 1024 bytes. Since the minimum file system
61 * blocksize is 512 bytes, we can get a max of 2 extents back from
64 #define SYMLINK_MAPS 2
67 * For xfs, we check that the file isn't too big to be opened by this kernel.
68 * No other open action is required for regular files. Devices are handled
69 * through the specfs file system, pipes through fifofs. Device and
70 * fifo vnodes are "wrapped" by specfs and fifofs vnodes, respectively,
71 * when a new vnode is first looked up or created.
82 vp
= BHV_TO_VNODE(bdp
);
85 if (XFS_FORCED_SHUTDOWN(ip
->i_mount
))
86 return XFS_ERROR(EIO
);
89 * If it's a directory with any blocks, read-ahead block 0
90 * as we're almost certain to have the next operation be a read there.
92 if (VN_ISDIR(vp
) && ip
->i_d
.di_nextents
> 0) {
93 mode
= xfs_ilock_map_shared(ip
);
94 if (ip
->i_d
.di_nextents
> 0)
95 (void)xfs_da_reada_buf(NULL
, ip
, 0, XFS_DATA_FORK
);
96 xfs_iunlock(ip
, mode
);
116 vp
= BHV_TO_VNODE(bdp
);
117 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
119 ip
= XFS_BHVTOI(bdp
);
122 if (XFS_FORCED_SHUTDOWN(mp
))
123 return XFS_ERROR(EIO
);
125 if (!(flags
& ATTR_LAZY
))
126 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
128 vap
->va_size
= ip
->i_d
.di_size
;
129 if (vap
->va_mask
== XFS_AT_SIZE
)
133 XFS_FSB_TO_BB(mp
, ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
134 vap
->va_nodeid
= ip
->i_ino
;
136 vap
->va_nodeid
+= mp
->m_inoadd
;
138 vap
->va_nlink
= ip
->i_d
.di_nlink
;
141 * Quick exit for non-stat callers
144 ~(XFS_AT_SIZE
|XFS_AT_FSID
|XFS_AT_NODEID
|
145 XFS_AT_NLINK
|XFS_AT_BLKSIZE
)) == 0)
149 * Copy from in-core inode.
151 vap
->va_mode
= ip
->i_d
.di_mode
;
152 vap
->va_uid
= ip
->i_d
.di_uid
;
153 vap
->va_gid
= ip
->i_d
.di_gid
;
154 vap
->va_projid
= ip
->i_d
.di_projid
;
157 * Check vnode type block/char vs. everything else.
159 switch (ip
->i_d
.di_mode
& S_IFMT
) {
162 vap
->va_rdev
= ip
->i_df
.if_u2
.if_rdev
;
163 vap
->va_blocksize
= BLKDEV_IOSIZE
;
168 if (!(ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
)) {
169 vap
->va_blocksize
= xfs_preferred_iosize(mp
);
173 * If the file blocks are being allocated from a
174 * realtime partition, then return the inode's
175 * realtime extent size or the realtime volume's
178 vap
->va_blocksize
= ip
->i_d
.di_extsize
?
179 (ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) :
180 (mp
->m_sb
.sb_rextsize
<< mp
->m_sb
.sb_blocklog
);
185 vap
->va_atime
.tv_sec
= ip
->i_d
.di_atime
.t_sec
;
186 vap
->va_atime
.tv_nsec
= ip
->i_d
.di_atime
.t_nsec
;
187 vap
->va_mtime
.tv_sec
= ip
->i_d
.di_mtime
.t_sec
;
188 vap
->va_mtime
.tv_nsec
= ip
->i_d
.di_mtime
.t_nsec
;
189 vap
->va_ctime
.tv_sec
= ip
->i_d
.di_ctime
.t_sec
;
190 vap
->va_ctime
.tv_nsec
= ip
->i_d
.di_ctime
.t_nsec
;
193 * Exit for stat callers. See if any of the rest of the fields
194 * to be filled in are needed.
197 (XFS_AT_XFLAGS
|XFS_AT_EXTSIZE
|XFS_AT_NEXTENTS
|XFS_AT_ANEXTENTS
|
198 XFS_AT_GENCOUNT
|XFS_AT_VCODE
)) == 0)
202 * Convert di_flags to xflags.
204 vap
->va_xflags
= xfs_ip2xflags(ip
);
207 * Exit for inode revalidate. See if any of the rest of
208 * the fields to be filled in are needed.
211 (XFS_AT_EXTSIZE
|XFS_AT_NEXTENTS
|XFS_AT_ANEXTENTS
|
212 XFS_AT_GENCOUNT
|XFS_AT_VCODE
)) == 0)
215 vap
->va_extsize
= ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
;
217 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
) ?
218 ip
->i_df
.if_bytes
/ sizeof(xfs_bmbt_rec_t
) :
222 (ip
->i_afp
->if_flags
& XFS_IFEXTENTS
) ?
223 ip
->i_afp
->if_bytes
/ sizeof(xfs_bmbt_rec_t
) :
224 ip
->i_d
.di_anextents
;
226 vap
->va_anextents
= 0;
227 vap
->va_gen
= ip
->i_d
.di_gen
;
230 if (!(flags
& ATTR_LAZY
))
231 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
257 xfs_prid_t projid
=0, iprojid
=0;
258 int mandlock_before
, mandlock_after
;
259 struct xfs_dquot
*udqp
, *gdqp
, *olddquot1
, *olddquot2
;
263 vp
= BHV_TO_VNODE(bdp
);
264 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
266 if (vp
->v_vfsp
->vfs_flag
& VFS_RDONLY
)
267 return XFS_ERROR(EROFS
);
270 * Cannot set certain attributes.
273 if (mask
& XFS_AT_NOSET
) {
274 return XFS_ERROR(EINVAL
);
277 ip
= XFS_BHVTOI(bdp
);
280 if (XFS_FORCED_SHUTDOWN(mp
))
281 return XFS_ERROR(EIO
);
284 * Timestamps do not need to be logged and hence do not
285 * need to be done within a transaction.
287 if (mask
& XFS_AT_UPDTIMES
) {
288 ASSERT((mask
& ~XFS_AT_UPDTIMES
) == 0);
289 timeflags
= ((mask
& XFS_AT_UPDATIME
) ? XFS_ICHGTIME_ACC
: 0) |
290 ((mask
& XFS_AT_UPDCTIME
) ? XFS_ICHGTIME_CHG
: 0) |
291 ((mask
& XFS_AT_UPDMTIME
) ? XFS_ICHGTIME_MOD
: 0);
292 xfs_ichgtime(ip
, timeflags
);
296 olddquot1
= olddquot2
= NULL
;
300 * If disk quotas is on, we make sure that the dquots do exist on disk,
301 * before we start any other transactions. Trying to do this later
302 * is messy. We don't care to take a readlock to look at the ids
303 * in inode here, because we can't hold it across the trans_reserve.
304 * If the IDs do change before we take the ilock, we're covered
305 * because the i_*dquot fields will get updated anyway.
307 if (XFS_IS_QUOTA_ON(mp
) &&
308 (mask
& (XFS_AT_UID
|XFS_AT_GID
|XFS_AT_PROJID
))) {
311 if ((mask
& XFS_AT_UID
) && XFS_IS_UQUOTA_ON(mp
)) {
313 qflags
|= XFS_QMOPT_UQUOTA
;
315 uid
= ip
->i_d
.di_uid
;
317 if ((mask
& XFS_AT_GID
) && XFS_IS_GQUOTA_ON(mp
)) {
319 qflags
|= XFS_QMOPT_GQUOTA
;
321 gid
= ip
->i_d
.di_gid
;
323 if ((mask
& XFS_AT_PROJID
) && XFS_IS_PQUOTA_ON(mp
)) {
324 projid
= vap
->va_projid
;
325 qflags
|= XFS_QMOPT_PQUOTA
;
327 projid
= ip
->i_d
.di_projid
;
330 * We take a reference when we initialize udqp and gdqp,
331 * so it is important that we never blindly double trip on
332 * the same variable. See xfs_create() for an example.
334 ASSERT(udqp
== NULL
);
335 ASSERT(gdqp
== NULL
);
336 code
= XFS_QM_DQVOPALLOC(mp
, ip
, uid
, gid
, projid
, qflags
,
343 * For the other attributes, we acquire the inode lock and
344 * first do an error checking pass.
347 lock_flags
= XFS_ILOCK_EXCL
;
348 ASSERT(flags
& ATTR_NOLOCK
? flags
& ATTR_DMI
: 1);
349 if (flags
& ATTR_NOLOCK
)
351 if (!(mask
& XFS_AT_SIZE
)) {
352 if ((mask
!= (XFS_AT_CTIME
|XFS_AT_ATIME
|XFS_AT_MTIME
)) ||
353 (mp
->m_flags
& XFS_MOUNT_WSYNC
)) {
354 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
356 if ((code
= xfs_trans_reserve(tp
, 0,
357 XFS_ICHANGE_LOG_RES(mp
), 0,
364 if (DM_EVENT_ENABLED (vp
->v_vfsp
, ip
, DM_EVENT_TRUNCATE
) &&
365 !(flags
& ATTR_DMI
)) {
366 int dmflags
= AT_DELAY_FLAG(flags
) | DM_SEM_FLAG_WR
;
367 code
= XFS_SEND_DATA(mp
, DM_EVENT_TRUNCATE
, vp
,
368 vap
->va_size
, 0, dmflags
, NULL
);
375 lock_flags
|= XFS_IOLOCK_EXCL
;
378 xfs_ilock(ip
, lock_flags
);
380 /* boolean: are we the file owner? */
381 file_owner
= (current_fsuid(credp
) == ip
->i_d
.di_uid
);
384 * Change various properties of a file.
385 * Only the owner or users with CAP_FOWNER
386 * capability may do these things.
389 (XFS_AT_MODE
|XFS_AT_XFLAGS
|XFS_AT_EXTSIZE
|XFS_AT_UID
|
390 XFS_AT_GID
|XFS_AT_PROJID
)) {
392 * CAP_FOWNER overrides the following restrictions:
394 * The user ID of the calling process must be equal
395 * to the file owner ID, except in cases where the
396 * CAP_FSETID capability is applicable.
398 if (!file_owner
&& !capable(CAP_FOWNER
)) {
399 code
= XFS_ERROR(EPERM
);
404 * CAP_FSETID overrides the following restrictions:
406 * The effective user ID of the calling process shall match
407 * the file owner when setting the set-user-ID and
408 * set-group-ID bits on that file.
410 * The effective group ID or one of the supplementary group
411 * IDs of the calling process shall match the group owner of
412 * the file when setting the set-group-ID bit on that file
414 if (mask
& XFS_AT_MODE
) {
417 if ((vap
->va_mode
& S_ISUID
) && !file_owner
)
419 if ((vap
->va_mode
& S_ISGID
) &&
420 !in_group_p((gid_t
)ip
->i_d
.di_gid
))
423 /* Linux allows this, Irix doesn't. */
424 if ((vap
->va_mode
& S_ISVTX
) && !VN_ISDIR(vp
))
427 if (m
&& !capable(CAP_FSETID
))
433 * Change file ownership. Must be the owner or privileged.
434 * If the system was configured with the "restricted_chown"
435 * option, the owner is not permitted to give away the file,
436 * and can change the group id only to a group of which he
437 * or she is a member.
439 if (mask
& (XFS_AT_UID
|XFS_AT_GID
|XFS_AT_PROJID
)) {
441 * These IDs could have changed since we last looked at them.
442 * But, we're assured that if the ownership did change
443 * while we didn't have the inode locked, inode's dquot(s)
444 * would have changed also.
446 iuid
= ip
->i_d
.di_uid
;
447 iprojid
= ip
->i_d
.di_projid
;
448 igid
= ip
->i_d
.di_gid
;
449 gid
= (mask
& XFS_AT_GID
) ? vap
->va_gid
: igid
;
450 uid
= (mask
& XFS_AT_UID
) ? vap
->va_uid
: iuid
;
451 projid
= (mask
& XFS_AT_PROJID
) ? (xfs_prid_t
)vap
->va_projid
:
455 * CAP_CHOWN overrides the following restrictions:
457 * If _POSIX_CHOWN_RESTRICTED is defined, this capability
458 * shall override the restriction that a process cannot
459 * change the user ID of a file it owns and the restriction
460 * that the group ID supplied to the chown() function
461 * shall be equal to either the group ID or one of the
462 * supplementary group IDs of the calling process.
464 if (restricted_chown
&&
465 (iuid
!= uid
|| (igid
!= gid
&&
466 !in_group_p((gid_t
)gid
))) &&
467 !capable(CAP_CHOWN
)) {
468 code
= XFS_ERROR(EPERM
);
472 * Do a quota reservation only if uid/projid/gid is actually
475 if ((XFS_IS_UQUOTA_ON(mp
) && iuid
!= uid
) ||
476 (XFS_IS_PQUOTA_ON(mp
) && iprojid
!= projid
) ||
477 (XFS_IS_GQUOTA_ON(mp
) && igid
!= gid
)) {
479 code
= XFS_QM_DQVOPCHOWNRESV(mp
, tp
, ip
, udqp
, gdqp
,
480 capable(CAP_FOWNER
) ?
481 XFS_QMOPT_FORCE_RES
: 0);
482 if (code
) /* out of quota */
488 * Truncate file. Must have write permission and not be a directory.
490 if (mask
& XFS_AT_SIZE
) {
491 /* Short circuit the truncate case for zero length files */
492 if ((vap
->va_size
== 0) &&
493 (ip
->i_d
.di_size
== 0) && (ip
->i_d
.di_nextents
== 0)) {
494 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
495 lock_flags
&= ~XFS_ILOCK_EXCL
;
496 if (mask
& XFS_AT_CTIME
)
497 xfs_ichgtime(ip
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
503 code
= XFS_ERROR(EISDIR
);
505 } else if (!VN_ISREG(vp
)) {
506 code
= XFS_ERROR(EINVAL
);
510 * Make sure that the dquots are attached to the inode.
512 if ((code
= XFS_QM_DQATTACH(mp
, ip
, XFS_QMOPT_ILOCKED
)))
517 * Change file access or modified times.
519 if (mask
& (XFS_AT_ATIME
|XFS_AT_MTIME
)) {
521 if ((flags
& ATTR_UTIME
) &&
522 !capable(CAP_FOWNER
)) {
523 code
= XFS_ERROR(EPERM
);
530 * Change extent size or realtime flag.
532 if (mask
& (XFS_AT_EXTSIZE
|XFS_AT_XFLAGS
)) {
534 * Can't change extent size if any extents are allocated.
536 if (ip
->i_d
.di_nextents
&& (mask
& XFS_AT_EXTSIZE
) &&
537 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
539 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
544 * Can't set extent size unless the file is marked, or
545 * about to be marked as a realtime file.
547 * This check will be removed when fixed size extents
548 * with buffered data writes is implemented.
551 if ((mask
& XFS_AT_EXTSIZE
) &&
552 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
554 (!((ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
) ||
555 ((mask
& XFS_AT_XFLAGS
) &&
556 (vap
->va_xflags
& XFS_XFLAG_REALTIME
))))) {
557 code
= XFS_ERROR(EINVAL
);
562 * Can't change realtime flag if any extents are allocated.
564 if ((ip
->i_d
.di_nextents
|| ip
->i_delayed_blks
) &&
565 (mask
& XFS_AT_XFLAGS
) &&
566 (ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
) !=
567 (vap
->va_xflags
& XFS_XFLAG_REALTIME
)) {
568 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
572 * Extent size must be a multiple of the appropriate block
573 * size, if set at all.
575 if ((mask
& XFS_AT_EXTSIZE
) && vap
->va_extsize
!= 0) {
578 if ((ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
) ||
579 ((mask
& XFS_AT_XFLAGS
) &&
580 (vap
->va_xflags
& XFS_XFLAG_REALTIME
))) {
581 size
= mp
->m_sb
.sb_rextsize
<<
582 mp
->m_sb
.sb_blocklog
;
584 size
= mp
->m_sb
.sb_blocksize
;
586 if (vap
->va_extsize
% size
) {
587 code
= XFS_ERROR(EINVAL
);
592 * If realtime flag is set then must have realtime data.
594 if ((mask
& XFS_AT_XFLAGS
) &&
595 (vap
->va_xflags
& XFS_XFLAG_REALTIME
)) {
596 if ((mp
->m_sb
.sb_rblocks
== 0) ||
597 (mp
->m_sb
.sb_rextsize
== 0) ||
598 (ip
->i_d
.di_extsize
% mp
->m_sb
.sb_rextsize
)) {
599 code
= XFS_ERROR(EINVAL
);
605 * Can't modify an immutable/append-only file unless
606 * we have appropriate permission.
608 if ((mask
& XFS_AT_XFLAGS
) &&
610 (XFS_DIFLAG_IMMUTABLE
|XFS_DIFLAG_APPEND
) ||
612 (XFS_XFLAG_IMMUTABLE
| XFS_XFLAG_APPEND
))) &&
613 !capable(CAP_LINUX_IMMUTABLE
)) {
614 code
= XFS_ERROR(EPERM
);
620 * Now we can make the changes. Before we join the inode
621 * to the transaction, if XFS_AT_SIZE is set then take care of
622 * the part of the truncation that must be done without the
623 * inode lock. This needs to be done before joining the inode
624 * to the transaction, because the inode cannot be unlocked
625 * once it is a part of the transaction.
627 if (mask
& XFS_AT_SIZE
) {
629 if ((vap
->va_size
> ip
->i_d
.di_size
) &&
630 (flags
& ATTR_NOSIZETOK
) == 0) {
631 code
= xfs_igrow_start(ip
, vap
->va_size
, credp
);
633 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
635 code
= xfs_itruncate_data(ip
, vap
->va_size
);
638 lock_flags
&= ~XFS_ILOCK_EXCL
;
639 ASSERT(lock_flags
== XFS_IOLOCK_EXCL
);
642 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_SIZE
);
643 if ((code
= xfs_trans_reserve(tp
, 0,
644 XFS_ITRUNCATE_LOG_RES(mp
), 0,
645 XFS_TRANS_PERM_LOG_RES
,
646 XFS_ITRUNCATE_LOG_COUNT
))) {
647 xfs_trans_cancel(tp
, 0);
649 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
652 commit_flags
= XFS_TRANS_RELEASE_LOG_RES
;
653 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
657 xfs_trans_ijoin(tp
, ip
, lock_flags
);
658 xfs_trans_ihold(tp
, ip
);
661 /* determine whether mandatory locking mode changes */
662 mandlock_before
= MANDLOCK(vp
, ip
->i_d
.di_mode
);
665 * Truncate file. Must have write permission and not be a directory.
667 if (mask
& XFS_AT_SIZE
) {
668 if (vap
->va_size
> ip
->i_d
.di_size
) {
669 xfs_igrow_finish(tp
, ip
, vap
->va_size
,
670 !(flags
& ATTR_DMI
));
671 } else if ((vap
->va_size
<= ip
->i_d
.di_size
) ||
672 ((vap
->va_size
== 0) && ip
->i_d
.di_nextents
)) {
674 * signal a sync transaction unless
675 * we're truncating an already unlinked
676 * file on a wsync filesystem
678 code
= xfs_itruncate_finish(&tp
, ip
,
679 (xfs_fsize_t
)vap
->va_size
,
681 ((ip
->i_d
.di_nlink
!= 0 ||
682 !(mp
->m_flags
& XFS_MOUNT_WSYNC
))
689 * Have to do this even if the file's size doesn't change.
691 timeflags
|= XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
;
695 * Change file access modes.
697 if (mask
& XFS_AT_MODE
) {
698 ip
->i_d
.di_mode
&= S_IFMT
;
699 ip
->i_d
.di_mode
|= vap
->va_mode
& ~S_IFMT
;
701 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
702 timeflags
|= XFS_ICHGTIME_CHG
;
706 * Change file ownership. Must be the owner or privileged.
707 * If the system was configured with the "restricted_chown"
708 * option, the owner is not permitted to give away the file,
709 * and can change the group id only to a group of which he
710 * or she is a member.
712 if (mask
& (XFS_AT_UID
|XFS_AT_GID
|XFS_AT_PROJID
)) {
714 * CAP_FSETID overrides the following restrictions:
716 * The set-user-ID and set-group-ID bits of a file will be
717 * cleared upon successful return from chown()
719 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
720 !capable(CAP_FSETID
)) {
721 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
725 * Change the ownerships and register quota modifications
726 * in the transaction.
729 if (XFS_IS_UQUOTA_ON(mp
)) {
730 ASSERT(mask
& XFS_AT_UID
);
732 olddquot1
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
733 &ip
->i_udquot
, udqp
);
735 ip
->i_d
.di_uid
= uid
;
738 if (XFS_IS_GQUOTA_ON(mp
)) {
739 ASSERT(!XFS_IS_PQUOTA_ON(mp
));
740 ASSERT(mask
& XFS_AT_GID
);
742 olddquot2
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
743 &ip
->i_gdquot
, gdqp
);
745 ip
->i_d
.di_gid
= gid
;
747 if (iprojid
!= projid
) {
748 if (XFS_IS_PQUOTA_ON(mp
)) {
749 ASSERT(!XFS_IS_GQUOTA_ON(mp
));
750 ASSERT(mask
& XFS_AT_PROJID
);
752 olddquot2
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
753 &ip
->i_gdquot
, gdqp
);
755 ip
->i_d
.di_projid
= projid
;
757 * We may have to rev the inode as well as
758 * the superblock version number since projids didn't
759 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
761 if (ip
->i_d
.di_version
== XFS_DINODE_VERSION_1
)
762 xfs_bump_ino_vers2(tp
, ip
);
765 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
766 timeflags
|= XFS_ICHGTIME_CHG
;
771 * Change file access or modified times.
773 if (mask
& (XFS_AT_ATIME
|XFS_AT_MTIME
)) {
774 if (mask
& XFS_AT_ATIME
) {
775 ip
->i_d
.di_atime
.t_sec
= vap
->va_atime
.tv_sec
;
776 ip
->i_d
.di_atime
.t_nsec
= vap
->va_atime
.tv_nsec
;
777 ip
->i_update_core
= 1;
778 timeflags
&= ~XFS_ICHGTIME_ACC
;
780 if (mask
& XFS_AT_MTIME
) {
781 ip
->i_d
.di_mtime
.t_sec
= vap
->va_mtime
.tv_sec
;
782 ip
->i_d
.di_mtime
.t_nsec
= vap
->va_mtime
.tv_nsec
;
783 timeflags
&= ~XFS_ICHGTIME_MOD
;
784 timeflags
|= XFS_ICHGTIME_CHG
;
786 if (tp
&& (flags
& ATTR_UTIME
))
787 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
791 * Change XFS-added attributes.
793 if (mask
& (XFS_AT_EXTSIZE
|XFS_AT_XFLAGS
)) {
794 if (mask
& XFS_AT_EXTSIZE
) {
796 * Converting bytes to fs blocks.
798 ip
->i_d
.di_extsize
= vap
->va_extsize
>>
799 mp
->m_sb
.sb_blocklog
;
801 if (mask
& XFS_AT_XFLAGS
) {
804 /* can't set PREALLOC this way, just preserve it */
805 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
806 if (vap
->va_xflags
& XFS_XFLAG_IMMUTABLE
)
807 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
808 if (vap
->va_xflags
& XFS_XFLAG_APPEND
)
809 di_flags
|= XFS_DIFLAG_APPEND
;
810 if (vap
->va_xflags
& XFS_XFLAG_SYNC
)
811 di_flags
|= XFS_DIFLAG_SYNC
;
812 if (vap
->va_xflags
& XFS_XFLAG_NOATIME
)
813 di_flags
|= XFS_DIFLAG_NOATIME
;
814 if (vap
->va_xflags
& XFS_XFLAG_NODUMP
)
815 di_flags
|= XFS_DIFLAG_NODUMP
;
816 if (vap
->va_xflags
& XFS_XFLAG_PROJINHERIT
)
817 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
818 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFDIR
) {
819 if (vap
->va_xflags
& XFS_XFLAG_RTINHERIT
)
820 di_flags
|= XFS_DIFLAG_RTINHERIT
;
821 if (vap
->va_xflags
& XFS_XFLAG_NOSYMLINKS
)
822 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
824 if (vap
->va_xflags
& XFS_XFLAG_REALTIME
) {
825 di_flags
|= XFS_DIFLAG_REALTIME
;
826 ip
->i_iocore
.io_flags
|= XFS_IOCORE_RT
;
828 ip
->i_iocore
.io_flags
&= ~XFS_IOCORE_RT
;
831 ip
->i_d
.di_flags
= di_flags
;
833 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
834 timeflags
|= XFS_ICHGTIME_CHG
;
838 * Change file inode change time only if XFS_AT_CTIME set
839 * AND we have been called by a DMI function.
842 if ( (flags
& ATTR_DMI
) && (mask
& XFS_AT_CTIME
) ) {
843 ip
->i_d
.di_ctime
.t_sec
= vap
->va_ctime
.tv_sec
;
844 ip
->i_d
.di_ctime
.t_nsec
= vap
->va_ctime
.tv_nsec
;
845 ip
->i_update_core
= 1;
846 timeflags
&= ~XFS_ICHGTIME_CHG
;
850 * Send out timestamp changes that need to be set to the
851 * current time. Not done when called by a DMI function.
853 if (timeflags
&& !(flags
& ATTR_DMI
))
854 xfs_ichgtime(ip
, timeflags
);
856 XFS_STATS_INC(xs_ig_attrchg
);
859 * If this is a synchronous mount, make sure that the
860 * transaction goes to disk before returning to the user.
861 * This is slightly sub-optimal in that truncates require
862 * two sync transactions instead of one for wsync filesytems.
863 * One for the truncate and one for the timestamps since we
864 * don't want to change the timestamps unless we're sure the
865 * truncate worked. Truncates are less than 1% of the laddis
866 * mix so this probably isn't worth the trouble to optimize.
870 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
871 xfs_trans_set_sync(tp
);
873 code
= xfs_trans_commit(tp
, commit_flags
, NULL
);
877 * If the (regular) file's mandatory locking mode changed, then
878 * notify the vnode. We do this under the inode lock to prevent
879 * racing calls to vop_vnode_change.
881 mandlock_after
= MANDLOCK(vp
, ip
->i_d
.di_mode
);
882 if (mandlock_before
!= mandlock_after
) {
883 VOP_VNODE_CHANGE(vp
, VCHANGE_FLAGS_ENF_LOCKING
,
887 xfs_iunlock(ip
, lock_flags
);
890 * Release any dquot(s) the inode had kept before chown.
892 XFS_QM_DQRELE(mp
, olddquot1
);
893 XFS_QM_DQRELE(mp
, olddquot2
);
894 XFS_QM_DQRELE(mp
, udqp
);
895 XFS_QM_DQRELE(mp
, gdqp
);
901 if (DM_EVENT_ENABLED(vp
->v_vfsp
, ip
, DM_EVENT_ATTRIBUTE
) &&
902 !(flags
& ATTR_DMI
)) {
903 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, vp
, DM_RIGHT_NULL
,
904 NULL
, DM_RIGHT_NULL
, NULL
, NULL
,
905 0, 0, AT_DELAY_FLAG(flags
));
910 commit_flags
|= XFS_TRANS_ABORT
;
913 XFS_QM_DQRELE(mp
, udqp
);
914 XFS_QM_DQRELE(mp
, gdqp
);
916 xfs_trans_cancel(tp
, commit_flags
);
918 if (lock_flags
!= 0) {
919 xfs_iunlock(ip
, lock_flags
);
927 * Null conversion from vnode mode bits to inode mode bits, as in efs.
938 vn_trace_entry(BHV_TO_VNODE(bdp
), __FUNCTION__
,
939 (inst_t
*)__return_address
);
941 ip
= XFS_BHVTOI(bdp
);
942 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
943 error
= xfs_iaccess(ip
, mode
, credp
);
944 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
968 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
974 vp
= BHV_TO_VNODE(bdp
);
975 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
977 ip
= XFS_BHVTOI(bdp
);
980 if (XFS_FORCED_SHUTDOWN(mp
))
981 return XFS_ERROR(EIO
);
983 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
985 ASSERT((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
);
987 offset
= uiop
->uio_offset
;
988 count
= uiop
->uio_resid
;
991 error
= XFS_ERROR(EINVAL
);
999 if (!(ioflags
& IO_INVIS
)) {
1000 xfs_ichgtime(ip
, XFS_ICHGTIME_ACC
);
1004 * See if the symlink is stored inline.
1006 pathlen
= (int)ip
->i_d
.di_size
;
1008 if (ip
->i_df
.if_flags
& XFS_IFINLINE
) {
1009 error
= uio_read(ip
->i_df
.if_u1
.if_data
, pathlen
, uiop
);
1013 * Symlink not inline. Call bmap to get it in.
1015 nmaps
= SYMLINK_MAPS
;
1017 error
= xfs_bmapi(NULL
, ip
, 0, XFS_B_TO_FSB(mp
, pathlen
),
1018 0, NULL
, 0, mval
, &nmaps
, NULL
);
1024 for (n
= 0; n
< nmaps
; n
++) {
1025 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
1026 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
1027 bp
= xfs_buf_read(mp
->m_ddev_targp
, d
,
1028 BTOBB(byte_cnt
), 0);
1029 error
= XFS_BUF_GETERROR(bp
);
1031 xfs_ioerror_alert("xfs_readlink",
1032 ip
->i_mount
, bp
, XFS_BUF_ADDR(bp
));
1036 if (pathlen
< byte_cnt
)
1038 pathlen
-= byte_cnt
;
1040 error
= uio_read(XFS_BUF_PTR(bp
), byte_cnt
, uiop
);
1049 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1058 * This is called to sync the inode and its data out to disk.
1059 * We need to hold the I/O lock while flushing the data, and
1060 * the inode lock while flushing the inode. The inode lock CANNOT
1061 * be held while flushing the data, so acquire after we're done
1075 int log_flushed
= 0, changed
= 1;
1077 vn_trace_entry(BHV_TO_VNODE(bdp
),
1078 __FUNCTION__
, (inst_t
*)__return_address
);
1080 ip
= XFS_BHVTOI(bdp
);
1082 ASSERT(start
>= 0 && stop
>= -1);
1084 if (XFS_FORCED_SHUTDOWN(ip
->i_mount
))
1085 return XFS_ERROR(EIO
);
1088 * We always need to make sure that the required inode state
1089 * is safe on disk. The vnode might be clean but because
1090 * of committed transactions that haven't hit the disk yet.
1091 * Likewise, there could be unflushed non-transactional
1092 * changes to the inode core that have to go to disk.
1094 * The following code depends on one assumption: that
1095 * any transaction that changes an inode logs the core
1096 * because it has to change some field in the inode core
1097 * (typically nextents or nblocks). That assumption
1098 * implies that any transactions against an inode will
1099 * catch any non-transactional updates. If inode-altering
1100 * transactions exist that violate this assumption, the
1101 * code breaks. Right now, it figures that if the involved
1102 * update_* field is clear and the inode is unpinned, the
1103 * inode is clean. Either it's been flushed or it's been
1104 * committed and the commit has hit the disk unpinning the inode.
1105 * (Note that xfs_inode_item_format() called at commit clears
1106 * the update_* fields.)
1108 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1110 /* If we are flushing data then we care about update_size
1111 * being set, otherwise we care about update_core
1113 if ((flag
& FSYNC_DATA
) ?
1114 (ip
->i_update_size
== 0) :
1115 (ip
->i_update_core
== 0)) {
1117 * Timestamps/size haven't changed since last inode
1118 * flush or inode transaction commit. That means
1119 * either nothing got written or a transaction
1120 * committed which caught the updates. If the
1121 * latter happened and the transaction hasn't
1122 * hit the disk yet, the inode will be still
1123 * be pinned. If it is, force the log.
1126 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1128 if (xfs_ipincount(ip
)) {
1129 _xfs_log_force(ip
->i_mount
, (xfs_lsn_t
)0,
1131 ((flag
& FSYNC_WAIT
)
1132 ? XFS_LOG_SYNC
: 0),
1136 * If the inode is not pinned and nothing
1137 * has changed we don't need to flush the
1145 * Kick off a transaction to log the inode
1146 * core to get the updates. Make it
1147 * sync if FSYNC_WAIT is passed in (which
1148 * is done by everybody but specfs). The
1149 * sync transaction will also force the log.
1151 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1152 tp
= xfs_trans_alloc(ip
->i_mount
, XFS_TRANS_FSYNC_TS
);
1153 if ((error
= xfs_trans_reserve(tp
, 0,
1154 XFS_FSYNC_TS_LOG_RES(ip
->i_mount
),
1156 xfs_trans_cancel(tp
, 0);
1159 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1162 * Note - it's possible that we might have pushed
1163 * ourselves out of the way during trans_reserve
1164 * which would flush the inode. But there's no
1165 * guarantee that the inode buffer has actually
1166 * gone out yet (it's delwri). Plus the buffer
1167 * could be pinned anyway if it's part of an
1168 * inode in another recent transaction. So we
1169 * play it safe and fire off the transaction anyway.
1171 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
1172 xfs_trans_ihold(tp
, ip
);
1173 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1174 if (flag
& FSYNC_WAIT
)
1175 xfs_trans_set_sync(tp
);
1176 error
= _xfs_trans_commit(tp
, 0, NULL
, &log_flushed
);
1178 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1181 if ((ip
->i_mount
->m_flags
& XFS_MOUNT_BARRIER
) && changed
) {
1183 * If the log write didn't issue an ordered tag we need
1184 * to flush the disk cache for the data device now.
1187 xfs_blkdev_issue_flush(ip
->i_mount
->m_ddev_targp
);
1190 * If this inode is on the RT dev we need to flush that
1193 if (ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
)
1194 xfs_blkdev_issue_flush(ip
->i_mount
->m_rtdev_targp
);
1201 * This is called by xfs_inactive to free any blocks beyond eof,
1202 * when the link count isn't zero.
1205 xfs_inactive_free_eofblocks(
1211 xfs_fileoff_t end_fsb
;
1212 xfs_fileoff_t last_fsb
;
1213 xfs_filblks_t map_len
;
1215 xfs_bmbt_irec_t imap
;
1218 * Figure out if there are any blocks beyond the end
1219 * of the file. If not, then there is nothing to do.
1221 end_fsb
= XFS_B_TO_FSB(mp
, ((xfs_ufsize_t
)ip
->i_d
.di_size
));
1222 last_fsb
= XFS_B_TO_FSB(mp
, (xfs_ufsize_t
)XFS_MAXIOFFSET(mp
));
1223 map_len
= last_fsb
- end_fsb
;
1228 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1229 error
= xfs_bmapi(NULL
, ip
, end_fsb
, map_len
, 0,
1230 NULL
, 0, &imap
, &nimaps
, NULL
);
1231 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1233 if (!error
&& (nimaps
!= 0) &&
1234 (imap
.br_startblock
!= HOLESTARTBLOCK
)) {
1236 * Attach the dquots to the inode up front.
1238 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
1242 * There are blocks after the end of file.
1243 * Free them up now by truncating the file to
1246 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1249 * Do the xfs_itruncate_start() call before
1250 * reserving any log space because
1251 * itruncate_start will call into the buffer
1252 * cache and we can't
1253 * do that within a transaction.
1255 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
1256 xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
,
1259 error
= xfs_trans_reserve(tp
, 0,
1260 XFS_ITRUNCATE_LOG_RES(mp
),
1261 0, XFS_TRANS_PERM_LOG_RES
,
1262 XFS_ITRUNCATE_LOG_COUNT
);
1264 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1265 xfs_trans_cancel(tp
, 0);
1266 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1270 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1271 xfs_trans_ijoin(tp
, ip
,
1274 xfs_trans_ihold(tp
, ip
);
1276 error
= xfs_itruncate_finish(&tp
, ip
,
1281 * If we get an error at this point we
1282 * simply don't bother truncating the file.
1285 xfs_trans_cancel(tp
,
1286 (XFS_TRANS_RELEASE_LOG_RES
|
1289 error
= xfs_trans_commit(tp
,
1290 XFS_TRANS_RELEASE_LOG_RES
,
1293 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1299 * Free a symlink that has blocks associated with it.
1302 xfs_inactive_symlink_rmt(
1310 xfs_fsblock_t first_block
;
1311 xfs_bmap_free_t free_list
;
1314 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
1322 ASSERT(ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
));
1324 * We're freeing a symlink that has some
1325 * blocks allocated to it. Free the
1326 * blocks here. We know that we've got
1327 * either 1 or 2 extents and that we can
1328 * free them all in one bunmapi call.
1330 ASSERT(ip
->i_d
.di_nextents
> 0 && ip
->i_d
.di_nextents
<= 2);
1331 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
1332 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
1333 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1334 xfs_trans_cancel(tp
, 0);
1339 * Lock the inode, fix the size, and join it to the transaction.
1340 * Hold it so in the normal path, we still have it locked for
1341 * the second transaction. In the error paths we need it
1342 * held so the cancel won't rele it, see below.
1344 xfs_ilock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1345 size
= (int)ip
->i_d
.di_size
;
1346 ip
->i_d
.di_size
= 0;
1347 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1348 xfs_trans_ihold(tp
, ip
);
1349 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1351 * Find the block(s) so we can inval and unmap them.
1354 XFS_BMAP_INIT(&free_list
, &first_block
);
1355 nmaps
= sizeof(mval
) / sizeof(mval
[0]);
1356 if ((error
= xfs_bmapi(tp
, ip
, 0, XFS_B_TO_FSB(mp
, size
),
1357 XFS_BMAPI_METADATA
, &first_block
, 0, mval
, &nmaps
,
1361 * Invalidate the block(s).
1363 for (i
= 0; i
< nmaps
; i
++) {
1364 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
,
1365 XFS_FSB_TO_DADDR(mp
, mval
[i
].br_startblock
),
1366 XFS_FSB_TO_BB(mp
, mval
[i
].br_blockcount
), 0);
1367 xfs_trans_binval(tp
, bp
);
1370 * Unmap the dead block(s) to the free_list.
1372 if ((error
= xfs_bunmapi(tp
, ip
, 0, size
, XFS_BMAPI_METADATA
, nmaps
,
1373 &first_block
, &free_list
, &done
)))
1377 * Commit the first transaction. This logs the EFI and the inode.
1379 if ((error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
)))
1382 * The transaction must have been committed, since there were
1383 * actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
1384 * The new tp has the extent freeing and EFDs.
1388 * The first xact was committed, so add the inode to the new one.
1389 * Mark it dirty so it will be logged and moved forward in the log as
1390 * part of every commit.
1392 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1393 xfs_trans_ihold(tp
, ip
);
1394 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1396 * Get a new, empty transaction to return to our caller.
1398 ntp
= xfs_trans_dup(tp
);
1400 * Commit the transaction containing extent freeing and EFD's.
1401 * If we get an error on the commit here or on the reserve below,
1402 * we need to unlock the inode since the new transaction doesn't
1403 * have the inode attached.
1405 error
= xfs_trans_commit(tp
, 0, NULL
);
1408 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1412 * Remove the memory for extent descriptions (just bookkeeping).
1414 if (ip
->i_df
.if_bytes
)
1415 xfs_idata_realloc(ip
, -ip
->i_df
.if_bytes
, XFS_DATA_FORK
);
1416 ASSERT(ip
->i_df
.if_bytes
== 0);
1418 * Put an itruncate log reservation in the new transaction
1421 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
1422 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
1423 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1427 * Return with the inode locked but not joined to the transaction.
1433 xfs_bmap_cancel(&free_list
);
1436 * Have to come here with the inode locked and either
1437 * (held and in the transaction) or (not in the transaction).
1438 * If the inode isn't held then cancel would iput it, but
1439 * that's wrong since this is inactive and the vnode ref
1440 * count is 0 already.
1441 * Cancel won't do anything to the inode if held, but it still
1442 * needs to be locked until the cancel is done, if it was
1443 * joined to the transaction.
1445 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1446 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1453 xfs_inactive_symlink_local(
1459 ASSERT(ip
->i_d
.di_size
<= XFS_IFORK_DSIZE(ip
));
1461 * We're freeing a symlink which fit into
1462 * the inode. Just free the memory used
1463 * to hold the old symlink.
1465 error
= xfs_trans_reserve(*tpp
, 0,
1466 XFS_ITRUNCATE_LOG_RES(ip
->i_mount
),
1467 0, XFS_TRANS_PERM_LOG_RES
,
1468 XFS_ITRUNCATE_LOG_COUNT
);
1471 xfs_trans_cancel(*tpp
, 0);
1475 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1478 * Zero length symlinks _can_ exist.
1480 if (ip
->i_df
.if_bytes
> 0) {
1481 xfs_idata_realloc(ip
,
1482 -(ip
->i_df
.if_bytes
),
1484 ASSERT(ip
->i_df
.if_bytes
== 0);
1501 ASSERT(ismrlocked(&ip
->i_iolock
, MR_UPDATE
));
1504 ASSERT(ip
->i_d
.di_forkoff
!= 0);
1505 xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
1506 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1508 error
= xfs_attr_inactive(ip
);
1511 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1512 return (error
); /* goto out*/
1515 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1516 error
= xfs_trans_reserve(tp
, 0,
1517 XFS_IFREE_LOG_RES(mp
),
1518 0, XFS_TRANS_PERM_LOG_RES
,
1519 XFS_INACTIVE_LOG_COUNT
);
1521 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1522 xfs_trans_cancel(tp
, 0);
1524 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1528 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1529 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1530 xfs_trans_ihold(tp
, ip
);
1531 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1533 ASSERT(ip
->i_d
.di_anextents
== 0);
1548 vp
= BHV_TO_VNODE(bdp
);
1549 ip
= XFS_BHVTOI(bdp
);
1551 if (!VN_ISREG(vp
) || (ip
->i_d
.di_mode
== 0)) {
1555 /* If this is a read-only mount, don't do this (would generate I/O) */
1556 if (vp
->v_vfsp
->vfs_flag
& VFS_RDONLY
)
1559 #ifdef HAVE_REFCACHE
1560 /* If we are in the NFS reference cache then don't do this now */
1567 if (ip
->i_d
.di_nlink
!= 0) {
1568 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1569 ((ip
->i_d
.di_size
> 0) || (VN_CACHED(vp
) > 0)) &&
1570 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)) &&
1571 (!(ip
->i_d
.di_flags
& (XFS_DIFLAG_PREALLOC
|XFS_DIFLAG_APPEND
)))) {
1572 if ((error
= xfs_inactive_free_eofblocks(mp
, ip
)))
1574 /* Update linux inode block count after free above */
1575 LINVFS_GET_IP(vp
)->i_blocks
= XFS_FSB_TO_BB(mp
,
1576 ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
1586 * This is called when the vnode reference count for the vnode
1587 * goes to zero. If the file has been unlinked, then it must
1588 * now be truncated. Also, we clear all of the read-ahead state
1589 * kept for the inode here since the file is now closed.
1598 xfs_bmap_free_t free_list
;
1599 xfs_fsblock_t first_block
;
1606 vp
= BHV_TO_VNODE(bdp
);
1607 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1609 ip
= XFS_BHVTOI(bdp
);
1612 * If the inode is already free, then there can be nothing
1615 if (ip
->i_d
.di_mode
== 0 || VN_BAD(vp
)) {
1616 ASSERT(ip
->i_df
.if_real_bytes
== 0);
1617 ASSERT(ip
->i_df
.if_broot_bytes
== 0);
1618 return VN_INACTIVE_CACHE
;
1622 * Only do a truncate if it's a regular file with
1623 * some actual space in it. It's OK to look at the
1624 * inode's fields without the lock because we're the
1625 * only one with a reference to the inode.
1627 truncate
= ((ip
->i_d
.di_nlink
== 0) &&
1628 ((ip
->i_d
.di_size
!= 0) || (ip
->i_d
.di_nextents
> 0)) &&
1629 ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
));
1633 if (ip
->i_d
.di_nlink
== 0 &&
1634 DM_EVENT_ENABLED(vp
->v_vfsp
, ip
, DM_EVENT_DESTROY
)) {
1635 (void) XFS_SEND_DESTROY(mp
, vp
, DM_RIGHT_NULL
);
1640 /* If this is a read-only mount, don't do this (would generate I/O) */
1641 if (vp
->v_vfsp
->vfs_flag
& VFS_RDONLY
)
1644 if (ip
->i_d
.di_nlink
!= 0) {
1645 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1646 ((ip
->i_d
.di_size
> 0) || (VN_CACHED(vp
) > 0)) &&
1647 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)) &&
1648 (!(ip
->i_d
.di_flags
& (XFS_DIFLAG_PREALLOC
|XFS_DIFLAG_APPEND
)) ||
1649 (ip
->i_delayed_blks
!= 0))) {
1650 if ((error
= xfs_inactive_free_eofblocks(mp
, ip
)))
1651 return (VN_INACTIVE_CACHE
);
1652 /* Update linux inode block count after free above */
1653 LINVFS_GET_IP(vp
)->i_blocks
= XFS_FSB_TO_BB(mp
,
1654 ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
1659 ASSERT(ip
->i_d
.di_nlink
== 0);
1661 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
1662 return (VN_INACTIVE_CACHE
);
1664 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1667 * Do the xfs_itruncate_start() call before
1668 * reserving any log space because itruncate_start
1669 * will call into the buffer cache and we can't
1670 * do that within a transaction.
1672 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
1674 xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
, 0);
1676 error
= xfs_trans_reserve(tp
, 0,
1677 XFS_ITRUNCATE_LOG_RES(mp
),
1678 0, XFS_TRANS_PERM_LOG_RES
,
1679 XFS_ITRUNCATE_LOG_COUNT
);
1681 /* Don't call itruncate_cleanup */
1682 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1683 xfs_trans_cancel(tp
, 0);
1684 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1685 return (VN_INACTIVE_CACHE
);
1688 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1689 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1690 xfs_trans_ihold(tp
, ip
);
1693 * normally, we have to run xfs_itruncate_finish sync.
1694 * But if filesystem is wsync and we're in the inactive
1695 * path, then we know that nlink == 0, and that the
1696 * xaction that made nlink == 0 is permanently committed
1697 * since xfs_remove runs as a synchronous transaction.
1699 error
= xfs_itruncate_finish(&tp
, ip
, 0, XFS_DATA_FORK
,
1700 (!(mp
->m_flags
& XFS_MOUNT_WSYNC
) ? 1 : 0));
1703 xfs_trans_cancel(tp
,
1704 XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1705 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1706 return (VN_INACTIVE_CACHE
);
1708 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
) {
1711 * If we get an error while cleaning up a
1712 * symlink we bail out.
1714 error
= (ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
)) ?
1715 xfs_inactive_symlink_rmt(ip
, &tp
) :
1716 xfs_inactive_symlink_local(ip
, &tp
);
1720 return (VN_INACTIVE_CACHE
);
1723 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1724 xfs_trans_ihold(tp
, ip
);
1726 error
= xfs_trans_reserve(tp
, 0,
1727 XFS_IFREE_LOG_RES(mp
),
1728 0, XFS_TRANS_PERM_LOG_RES
,
1729 XFS_INACTIVE_LOG_COUNT
);
1731 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1732 xfs_trans_cancel(tp
, 0);
1733 return (VN_INACTIVE_CACHE
);
1736 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1737 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1738 xfs_trans_ihold(tp
, ip
);
1742 * If there are attributes associated with the file
1743 * then blow them away now. The code calls a routine
1744 * that recursively deconstructs the attribute fork.
1745 * We need to just commit the current transaction
1746 * because we can't use it for xfs_attr_inactive().
1748 if (ip
->i_d
.di_anextents
> 0) {
1749 error
= xfs_inactive_attrs(ip
, &tp
);
1751 * If we got an error, the transaction is already
1752 * cancelled, and the inode is unlocked. Just get out.
1755 return (VN_INACTIVE_CACHE
);
1756 } else if (ip
->i_afp
) {
1757 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1763 XFS_BMAP_INIT(&free_list
, &first_block
);
1764 error
= xfs_ifree(tp
, ip
, &free_list
);
1767 * If we fail to free the inode, shut down. The cancel
1768 * might do that, we need to make sure. Otherwise the
1769 * inode might be lost for a long time or forever.
1771 if (!XFS_FORCED_SHUTDOWN(mp
)) {
1773 "xfs_inactive: xfs_ifree() returned an error = %d on %s",
1774 error
, mp
->m_fsname
);
1775 xfs_force_shutdown(mp
, XFS_METADATA_IO_ERROR
);
1777 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
|XFS_TRANS_ABORT
);
1780 * Credit the quota account(s). The inode is gone.
1782 XFS_TRANS_MOD_DQUOT_BYINO(mp
, tp
, ip
, XFS_TRANS_DQ_ICOUNT
, -1);
1785 * Just ignore errors at this point. There is
1786 * nothing we can do except to try to keep going.
1788 (void) xfs_bmap_finish(&tp
, &free_list
, first_block
,
1790 (void) xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
1793 * Release the dquots held by inode, if any.
1795 XFS_QM_DQDETACH(mp
, ip
);
1797 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1800 return VN_INACTIVE_CACHE
;
1809 bhv_desc_t
*dir_bdp
,
1816 xfs_inode_t
*dp
, *ip
;
1822 dir_vp
= BHV_TO_VNODE(dir_bdp
);
1823 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1825 dp
= XFS_BHVTOI(dir_bdp
);
1827 if (XFS_FORCED_SHUTDOWN(dp
->i_mount
))
1828 return XFS_ERROR(EIO
);
1830 lock_mode
= xfs_ilock_map_shared(dp
);
1831 error
= xfs_dir_lookup_int(dir_bdp
, lock_mode
, dentry
, &e_inum
, &ip
);
1833 *vpp
= XFS_ITOV(ip
);
1836 xfs_iunlock_map_shared(dp
, lock_mode
);
1842 * xfs_create (create a new file).
1846 bhv_desc_t
*dir_bdp
,
1852 char *name
= VNAME(dentry
);
1854 xfs_inode_t
*dp
, *ip
;
1860 xfs_bmap_free_t free_list
;
1861 xfs_fsblock_t first_block
;
1862 boolean_t dp_joined_to_trans
;
1863 int dm_event_sent
= 0;
1867 struct xfs_dquot
*udqp
, *gdqp
;
1873 dir_vp
= BHV_TO_VNODE(dir_bdp
);
1874 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1876 dp
= XFS_BHVTOI(dir_bdp
);
1879 dm_di_mode
= vap
->va_mode
;
1880 namelen
= VNAMELEN(dentry
);
1882 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_CREATE
)) {
1883 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
1884 dir_vp
, DM_RIGHT_NULL
, NULL
,
1885 DM_RIGHT_NULL
, name
, NULL
,
1893 if (XFS_FORCED_SHUTDOWN(mp
))
1894 return XFS_ERROR(EIO
);
1896 /* Return through std_return after this point. */
1899 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
1900 prid
= dp
->i_d
.di_projid
;
1901 else if (vap
->va_mask
& XFS_AT_PROJID
)
1902 prid
= (xfs_prid_t
)vap
->va_projid
;
1904 prid
= (xfs_prid_t
)dfltprid
;
1907 * Make sure that we have allocated dquot(s) on disk.
1909 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
1910 current_fsuid(credp
), current_fsgid(credp
), prid
,
1911 XFS_QMOPT_QUOTALL
|XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
1916 dp_joined_to_trans
= B_FALSE
;
1918 tp
= xfs_trans_alloc(mp
, XFS_TRANS_CREATE
);
1919 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
1920 resblks
= XFS_CREATE_SPACE_RES(mp
, namelen
);
1922 * Initially assume that the file does not exist and
1923 * reserve the resources for that case. If that is not
1924 * the case we'll drop the one we have and get a more
1925 * appropriate transaction later.
1927 error
= xfs_trans_reserve(tp
, resblks
, XFS_CREATE_LOG_RES(mp
), 0,
1928 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1929 if (error
== ENOSPC
) {
1931 error
= xfs_trans_reserve(tp
, 0, XFS_CREATE_LOG_RES(mp
), 0,
1932 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1940 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
1942 XFS_BMAP_INIT(&free_list
, &first_block
);
1947 * Reserve disk quota and the inode.
1949 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
1954 (error
= XFS_DIR_CANENTER(mp
, tp
, dp
, name
, namelen
)))
1956 rdev
= (vap
->va_mask
& XFS_AT_RDEV
) ? vap
->va_rdev
: 0;
1957 error
= xfs_dir_ialloc(&tp
, dp
, vap
->va_mode
, 1,
1958 rdev
, credp
, prid
, resblks
> 0,
1961 if (error
== ENOSPC
)
1968 * At this point, we've gotten a newly allocated inode.
1969 * It is locked (and joined to the transaction).
1972 ASSERT(ismrlocked (&ip
->i_lock
, MR_UPDATE
));
1975 * Now we join the directory inode to the transaction.
1976 * We do not do it earlier because xfs_dir_ialloc
1977 * might commit the previous transaction (and release
1982 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
1983 dp_joined_to_trans
= B_TRUE
;
1985 error
= XFS_DIR_CREATENAME(mp
, tp
, dp
, name
, namelen
, ip
->i_ino
,
1986 &first_block
, &free_list
,
1987 resblks
? resblks
- XFS_IALLOC_SPACE_RES(mp
) : 0);
1989 ASSERT(error
!= ENOSPC
);
1992 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
1993 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
1996 * If this is a synchronous mount, make sure that the
1997 * create transaction goes to disk before returning to
2000 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2001 xfs_trans_set_sync(tp
);
2007 * Attach the dquot(s) to the inodes and modify them incore.
2008 * These ids of the inode couldn't have changed since the new
2009 * inode has been locked ever since it was created.
2011 XFS_QM_DQVOPCREATE(mp
, tp
, ip
, udqp
, gdqp
);
2014 * xfs_trans_commit normally decrements the vnode ref count
2015 * when it unlocks the inode. Since we want to return the
2016 * vnode to the caller, we bump the vnode ref count now.
2021 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
2023 xfs_bmap_cancel(&free_list
);
2027 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2034 XFS_QM_DQRELE(mp
, udqp
);
2035 XFS_QM_DQRELE(mp
, gdqp
);
2038 * Propogate the fact that the vnode changed after the
2039 * xfs_inode locks have been released.
2041 VOP_VNODE_CHANGE(vp
, VCHANGE_FLAGS_TRUNCATED
, 3);
2045 /* Fallthrough to std_return with error = 0 */
2048 if ( (*vpp
|| (error
!= 0 && dm_event_sent
!= 0)) &&
2049 DM_EVENT_ENABLED(dir_vp
->v_vfsp
, XFS_BHVTOI(dir_bdp
),
2050 DM_EVENT_POSTCREATE
)) {
2051 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTCREATE
,
2052 dir_vp
, DM_RIGHT_NULL
,
2054 DM_RIGHT_NULL
, name
, NULL
,
2055 dm_di_mode
, error
, 0);
2060 cancel_flags
|= XFS_TRANS_ABORT
;
2065 xfs_trans_cancel(tp
, cancel_flags
);
2067 if (!dp_joined_to_trans
&& (dp
!= NULL
))
2068 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2069 XFS_QM_DQRELE(mp
, udqp
);
2070 XFS_QM_DQRELE(mp
, gdqp
);
2076 * Wait until after the current transaction is aborted to
2077 * release the inode. This prevents recursive transactions
2078 * and deadlocks from xfs_inactive.
2080 cancel_flags
|= XFS_TRANS_ABORT
;
2081 xfs_trans_cancel(tp
, cancel_flags
);
2084 XFS_QM_DQRELE(mp
, udqp
);
2085 XFS_QM_DQRELE(mp
, gdqp
);
2092 * Some counters to see if (and how often) we are hitting some deadlock
2093 * prevention code paths.
2097 int xfs_rm_lock_delays
;
2098 int xfs_rm_attempts
;
2102 * The following routine will lock the inodes associated with the
2103 * directory and the named entry in the directory. The locks are
2104 * acquired in increasing inode number.
2106 * If the entry is "..", then only the directory is locked. The
2107 * vnode ref count will still include that from the .. entry in
2110 * There is a deadlock we need to worry about. If the locked directory is
2111 * in the AIL, it might be blocking up the log. The next inode we lock
2112 * could be already locked by another thread waiting for log space (e.g
2113 * a permanent log reservation with a long running transaction (see
2114 * xfs_itruncate_finish)). To solve this, we must check if the directory
2115 * is in the ail and use lock_nowait. If we can't lock, we need to
2116 * drop the inode lock on the directory and try again. xfs_iunlock will
2117 * potentially push the tail if we were holding up the log.
2120 xfs_lock_dir_and_entry(
2123 xfs_inode_t
*ip
) /* inode of entry 'name' */
2127 xfs_inode_t
*ips
[2];
2136 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
2143 * We want to lock in increasing inum. Since we've already
2144 * acquired the lock on the directory, we may need to release
2145 * if if the inum of the entry turns out to be less.
2147 if (e_inum
> dp
->i_ino
) {
2149 * We are already in the right order, so just
2150 * lock on the inode of the entry.
2151 * We need to use nowait if dp is in the AIL.
2154 lp
= (xfs_log_item_t
*)dp
->i_itemp
;
2155 if (lp
&& (lp
->li_flags
& XFS_LI_IN_AIL
)) {
2156 if (!xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
)) {
2163 * Unlock dp and try again.
2164 * xfs_iunlock will try to push the tail
2165 * if the inode is in the AIL.
2168 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2170 if ((attempts
% 5) == 0) {
2171 delay(1); /* Don't just spin the CPU */
2173 xfs_rm_lock_delays
++;
2179 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
2181 } else if (e_inum
< dp
->i_ino
) {
2182 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2186 xfs_lock_inodes(ips
, 2, 0, XFS_ILOCK_EXCL
);
2188 /* else e_inum == dp->i_ino */
2189 /* This can happen if we're asked to lock /x/..
2190 * the entry is "..", which is also the parent directory.
2198 int xfs_small_retries
;
2199 int xfs_middle_retries
;
2200 int xfs_lots_retries
;
2201 int xfs_lock_delays
;
2205 * The following routine will lock n inodes in exclusive mode.
2206 * We assume the caller calls us with the inodes in i_ino order.
2208 * We need to detect deadlock where an inode that we lock
2209 * is in the AIL and we start waiting for another inode that is locked
2210 * by a thread in a long running transaction (such as truncate). This can
2211 * result in deadlock since the long running trans might need to wait
2212 * for the inode we just locked in order to push the tail and free space
2222 int attempts
= 0, i
, j
, try_lock
;
2225 ASSERT(ips
&& (inodes
>= 2)); /* we need at least two */
2236 for (; i
< inodes
; i
++) {
2239 if (i
&& (ips
[i
] == ips
[i
-1])) /* Already locked */
2243 * If try_lock is not set yet, make sure all locked inodes
2244 * are not in the AIL.
2245 * If any are, set try_lock to be used later.
2249 for (j
= (i
- 1); j
>= 0 && !try_lock
; j
--) {
2250 lp
= (xfs_log_item_t
*)ips
[j
]->i_itemp
;
2251 if (lp
&& (lp
->li_flags
& XFS_LI_IN_AIL
)) {
2258 * If any of the previous locks we have locked is in the AIL,
2259 * we must TRY to get the second and subsequent locks. If
2260 * we can't get any, we must release all we have
2265 /* try_lock must be 0 if i is 0. */
2267 * try_lock means we have an inode locked
2268 * that is in the AIL.
2271 if (!xfs_ilock_nowait(ips
[i
], lock_mode
)) {
2275 * Unlock all previous guys and try again.
2276 * xfs_iunlock will try to push the tail
2277 * if the inode is in the AIL.
2280 for(j
= i
- 1; j
>= 0; j
--) {
2283 * Check to see if we've already
2284 * unlocked this one.
2285 * Not the first one going back,
2286 * and the inode ptr is the same.
2288 if ((j
!= (i
- 1)) && ips
[j
] ==
2292 xfs_iunlock(ips
[j
], lock_mode
);
2295 if ((attempts
% 5) == 0) {
2296 delay(1); /* Don't just spin the CPU */
2306 xfs_ilock(ips
[i
], lock_mode
);
2312 if (attempts
< 5) xfs_small_retries
++;
2313 else if (attempts
< 100) xfs_middle_retries
++;
2314 else xfs_lots_retries
++;
2322 #define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);}
2323 int remove_which_error_return
= 0;
2325 #define REMOVE_DEBUG_TRACE(x)
2326 #endif /* ! DEBUG */
2335 bhv_desc_t
*dir_bdp
,
2340 char *name
= VNAME(dentry
);
2341 xfs_inode_t
*dp
, *ip
;
2342 xfs_trans_t
*tp
= NULL
;
2345 xfs_bmap_free_t free_list
;
2346 xfs_fsblock_t first_block
;
2354 dir_vp
= BHV_TO_VNODE(dir_bdp
);
2355 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
2357 dp
= XFS_BHVTOI(dir_bdp
);
2360 if (XFS_FORCED_SHUTDOWN(mp
))
2361 return XFS_ERROR(EIO
);
2363 namelen
= VNAMELEN(dentry
);
2365 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_REMOVE
)) {
2366 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_REMOVE
, dir_vp
,
2367 DM_RIGHT_NULL
, NULL
, DM_RIGHT_NULL
,
2368 name
, NULL
, 0, 0, 0);
2373 /* From this point on, return through std_return */
2377 * We need to get a reference to ip before we get our log
2378 * reservation. The reason for this is that we cannot call
2379 * xfs_iget for an inode for which we do not have a reference
2380 * once we've acquired a log reservation. This is because the
2381 * inode we are trying to get might be in xfs_inactive going
2382 * for a log reservation. Since we'll have to wait for the
2383 * inactive code to complete before returning from xfs_iget,
2384 * we need to make sure that we don't have log space reserved
2385 * when we call xfs_iget. Instead we get an unlocked referece
2386 * to the inode before getting our log reservation.
2388 error
= xfs_get_dir_entry(dentry
, &ip
);
2390 REMOVE_DEBUG_TRACE(__LINE__
);
2394 dm_di_mode
= ip
->i_d
.di_mode
;
2396 vn_trace_entry(XFS_ITOV(ip
), __FUNCTION__
, (inst_t
*)__return_address
);
2400 error
= XFS_QM_DQATTACH(mp
, dp
, 0);
2401 if (!error
&& dp
!= ip
)
2402 error
= XFS_QM_DQATTACH(mp
, ip
, 0);
2404 REMOVE_DEBUG_TRACE(__LINE__
);
2409 tp
= xfs_trans_alloc(mp
, XFS_TRANS_REMOVE
);
2410 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2412 * We try to get the real space reservation first,
2413 * allowing for directory btree deletion(s) implying
2414 * possible bmap insert(s). If we can't get the space
2415 * reservation then we use 0 instead, and avoid the bmap
2416 * btree insert(s) in the directory code by, if the bmap
2417 * insert tries to happen, instead trimming the LAST
2418 * block from the directory.
2420 resblks
= XFS_REMOVE_SPACE_RES(mp
);
2421 error
= xfs_trans_reserve(tp
, resblks
, XFS_REMOVE_LOG_RES(mp
), 0,
2422 XFS_TRANS_PERM_LOG_RES
, XFS_REMOVE_LOG_COUNT
);
2423 if (error
== ENOSPC
) {
2425 error
= xfs_trans_reserve(tp
, 0, XFS_REMOVE_LOG_RES(mp
), 0,
2426 XFS_TRANS_PERM_LOG_RES
, XFS_REMOVE_LOG_COUNT
);
2429 ASSERT(error
!= ENOSPC
);
2430 REMOVE_DEBUG_TRACE(__LINE__
);
2431 xfs_trans_cancel(tp
, 0);
2436 error
= xfs_lock_dir_and_entry(dp
, dentry
, ip
);
2438 REMOVE_DEBUG_TRACE(__LINE__
);
2439 xfs_trans_cancel(tp
, cancel_flags
);
2445 * At this point, we've gotten both the directory and the entry
2448 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2451 * Increment vnode ref count only in this case since
2452 * there's an extra vnode reference in the case where
2456 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
2460 * Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
2462 XFS_BMAP_INIT(&free_list
, &first_block
);
2463 error
= XFS_DIR_REMOVENAME(mp
, tp
, dp
, name
, namelen
, ip
->i_ino
,
2464 &first_block
, &free_list
, 0);
2466 ASSERT(error
!= ENOENT
);
2467 REMOVE_DEBUG_TRACE(__LINE__
);
2470 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2473 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
2475 error
= xfs_droplink(tp
, ip
);
2477 REMOVE_DEBUG_TRACE(__LINE__
);
2481 /* Determine if this is the last link while
2482 * we are in the transaction.
2484 link_zero
= (ip
)->i_d
.di_nlink
==0;
2487 * Take an extra ref on the inode so that it doesn't
2488 * go to xfs_inactive() from within the commit.
2493 * If this is a synchronous mount, make sure that the
2494 * remove transaction goes to disk before returning to
2497 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2498 xfs_trans_set_sync(tp
);
2501 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
2503 REMOVE_DEBUG_TRACE(__LINE__
);
2507 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2514 * Before we drop our extra reference to the inode, purge it
2515 * from the refcache if it is there. By waiting until afterwards
2516 * to do the IRELE, we ensure that we won't go inactive in the
2517 * xfs_refcache_purge_ip routine (although that would be OK).
2519 xfs_refcache_purge_ip(ip
);
2521 vn_trace_exit(XFS_ITOV(ip
), __FUNCTION__
, (inst_t
*)__return_address
);
2524 * Let interposed file systems know about removed links.
2526 VOP_LINK_REMOVED(XFS_ITOV(ip
), dir_vp
, link_zero
);
2530 /* Fall through to std_return with error = 0 */
2532 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
,
2533 DM_EVENT_POSTREMOVE
)) {
2534 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTREMOVE
,
2535 dir_vp
, DM_RIGHT_NULL
,
2536 NULL
, DM_RIGHT_NULL
,
2537 name
, NULL
, dm_di_mode
, error
, 0);
2542 xfs_bmap_cancel(&free_list
);
2543 cancel_flags
|= XFS_TRANS_ABORT
;
2544 xfs_trans_cancel(tp
, cancel_flags
);
2549 * In this case make sure to not release the inode until after
2550 * the current transaction is aborted. Releasing it beforehand
2551 * can cause us to go to xfs_inactive and start a recursive
2552 * transaction which can easily deadlock with the current one.
2554 xfs_bmap_cancel(&free_list
);
2555 cancel_flags
|= XFS_TRANS_ABORT
;
2556 xfs_trans_cancel(tp
, cancel_flags
);
2559 * Before we drop our extra reference to the inode, purge it
2560 * from the refcache if it is there. By waiting until afterwards
2561 * to do the IRELE, we ensure that we won't go inactive in the
2562 * xfs_refcache_purge_ip routine (although that would be OK).
2564 xfs_refcache_purge_ip(ip
);
2578 bhv_desc_t
*target_dir_bdp
,
2583 xfs_inode_t
*tdp
, *sip
;
2586 xfs_inode_t
*ips
[2];
2588 xfs_bmap_free_t free_list
;
2589 xfs_fsblock_t first_block
;
2592 vnode_t
*target_dir_vp
;
2593 bhv_desc_t
*src_bdp
;
2595 char *target_name
= VNAME(dentry
);
2598 target_dir_vp
= BHV_TO_VNODE(target_dir_bdp
);
2599 vn_trace_entry(target_dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
2600 vn_trace_entry(src_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
2602 target_namelen
= VNAMELEN(dentry
);
2603 if (VN_ISDIR(src_vp
))
2604 return XFS_ERROR(EPERM
);
2606 src_bdp
= vn_bhv_lookup_unlocked(VN_BHV_HEAD(src_vp
), &xfs_vnodeops
);
2607 sip
= XFS_BHVTOI(src_bdp
);
2608 tdp
= XFS_BHVTOI(target_dir_bdp
);
2610 if (XFS_FORCED_SHUTDOWN(mp
))
2611 return XFS_ERROR(EIO
);
2613 if (DM_EVENT_ENABLED(src_vp
->v_vfsp
, tdp
, DM_EVENT_LINK
)) {
2614 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_LINK
,
2615 target_dir_vp
, DM_RIGHT_NULL
,
2616 src_vp
, DM_RIGHT_NULL
,
2617 target_name
, NULL
, 0, 0, 0);
2622 /* Return through std_return after this point. */
2624 error
= XFS_QM_DQATTACH(mp
, sip
, 0);
2625 if (!error
&& sip
!= tdp
)
2626 error
= XFS_QM_DQATTACH(mp
, tdp
, 0);
2630 tp
= xfs_trans_alloc(mp
, XFS_TRANS_LINK
);
2631 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2632 resblks
= XFS_LINK_SPACE_RES(mp
, target_namelen
);
2633 error
= xfs_trans_reserve(tp
, resblks
, XFS_LINK_LOG_RES(mp
), 0,
2634 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2635 if (error
== ENOSPC
) {
2637 error
= xfs_trans_reserve(tp
, 0, XFS_LINK_LOG_RES(mp
), 0,
2638 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2645 if (sip
->i_ino
< tdp
->i_ino
) {
2653 xfs_lock_inodes(ips
, 2, 0, XFS_ILOCK_EXCL
);
2656 * Increment vnode ref counts since xfs_trans_commit &
2657 * xfs_trans_cancel will both unlock the inodes and
2658 * decrement the associated ref counts.
2661 VN_HOLD(target_dir_vp
);
2662 xfs_trans_ijoin(tp
, sip
, XFS_ILOCK_EXCL
);
2663 xfs_trans_ijoin(tp
, tdp
, XFS_ILOCK_EXCL
);
2666 * If the source has too many links, we can't make any more to it.
2668 if (sip
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2669 error
= XFS_ERROR(EMLINK
);
2674 * If we are using project inheritance, we only allow hard link
2675 * creation in our tree when the project IDs are the same; else
2676 * the tree quota mechanism could be circumvented.
2678 if (unlikely((tdp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) &&
2679 (tdp
->i_d
.di_projid
!= sip
->i_d
.di_projid
))) {
2680 error
= XFS_ERROR(EPERM
);
2685 (error
= XFS_DIR_CANENTER(mp
, tp
, tdp
, target_name
,
2689 XFS_BMAP_INIT(&free_list
, &first_block
);
2691 error
= XFS_DIR_CREATENAME(mp
, tp
, tdp
, target_name
, target_namelen
,
2692 sip
->i_ino
, &first_block
, &free_list
,
2696 xfs_ichgtime(tdp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2698 xfs_trans_log_inode(tp
, tdp
, XFS_ILOG_CORE
);
2700 error
= xfs_bumplink(tp
, sip
);
2706 * If this is a synchronous mount, make sure that the
2707 * link transaction goes to disk before returning to
2710 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2711 xfs_trans_set_sync(tp
);
2714 error
= xfs_bmap_finish (&tp
, &free_list
, first_block
, &committed
);
2716 xfs_bmap_cancel(&free_list
);
2720 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2725 /* Fall through to std_return with error = 0. */
2727 if (DM_EVENT_ENABLED(src_vp
->v_vfsp
, sip
,
2728 DM_EVENT_POSTLINK
)) {
2729 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTLINK
,
2730 target_dir_vp
, DM_RIGHT_NULL
,
2731 src_vp
, DM_RIGHT_NULL
,
2732 target_name
, NULL
, 0, error
, 0);
2737 cancel_flags
|= XFS_TRANS_ABORT
;
2740 xfs_trans_cancel(tp
, cancel_flags
);
2750 bhv_desc_t
*dir_bdp
,
2756 char *dir_name
= VNAME(dentry
);
2758 xfs_inode_t
*cdp
; /* inode of created dir */
2759 vnode_t
*cvp
; /* vnode of created dir */
2765 xfs_bmap_free_t free_list
;
2766 xfs_fsblock_t first_block
;
2768 boolean_t dp_joined_to_trans
;
2769 boolean_t created
= B_FALSE
;
2770 int dm_event_sent
= 0;
2772 struct xfs_dquot
*udqp
, *gdqp
;
2777 dir_vp
= BHV_TO_VNODE(dir_bdp
);
2778 dp
= XFS_BHVTOI(dir_bdp
);
2781 if (XFS_FORCED_SHUTDOWN(mp
))
2782 return XFS_ERROR(EIO
);
2784 dir_namelen
= VNAMELEN(dentry
);
2787 dp_joined_to_trans
= B_FALSE
;
2788 dm_di_mode
= vap
->va_mode
;
2790 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_CREATE
)) {
2791 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
2792 dir_vp
, DM_RIGHT_NULL
, NULL
,
2793 DM_RIGHT_NULL
, dir_name
, NULL
,
2800 /* Return through std_return after this point. */
2802 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
2806 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
2807 prid
= dp
->i_d
.di_projid
;
2808 else if (vap
->va_mask
& XFS_AT_PROJID
)
2809 prid
= (xfs_prid_t
)vap
->va_projid
;
2811 prid
= (xfs_prid_t
)dfltprid
;
2814 * Make sure that we have allocated dquot(s) on disk.
2816 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
2817 current_fsuid(credp
), current_fsgid(credp
), prid
,
2818 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
2822 tp
= xfs_trans_alloc(mp
, XFS_TRANS_MKDIR
);
2823 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2824 resblks
= XFS_MKDIR_SPACE_RES(mp
, dir_namelen
);
2825 error
= xfs_trans_reserve(tp
, resblks
, XFS_MKDIR_LOG_RES(mp
), 0,
2826 XFS_TRANS_PERM_LOG_RES
, XFS_MKDIR_LOG_COUNT
);
2827 if (error
== ENOSPC
) {
2829 error
= xfs_trans_reserve(tp
, 0, XFS_MKDIR_LOG_RES(mp
), 0,
2830 XFS_TRANS_PERM_LOG_RES
,
2831 XFS_MKDIR_LOG_COUNT
);
2839 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
2842 * Check for directory link count overflow.
2844 if (dp
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2845 error
= XFS_ERROR(EMLINK
);
2850 * Reserve disk quota and the inode.
2852 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
2857 (error
= XFS_DIR_CANENTER(mp
, tp
, dp
, dir_name
, dir_namelen
)))
2860 * create the directory inode.
2862 error
= xfs_dir_ialloc(&tp
, dp
, vap
->va_mode
, 2,
2863 0, credp
, prid
, resblks
> 0,
2866 if (error
== ENOSPC
)
2873 * Now we add the directory inode to the transaction.
2874 * We waited until now since xfs_dir_ialloc might start
2875 * a new transaction. Had we joined the transaction
2876 * earlier, the locks might have gotten released.
2879 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2880 dp_joined_to_trans
= B_TRUE
;
2882 XFS_BMAP_INIT(&free_list
, &first_block
);
2884 error
= XFS_DIR_CREATENAME(mp
, tp
, dp
, dir_name
, dir_namelen
,
2885 cdp
->i_ino
, &first_block
, &free_list
,
2886 resblks
? resblks
- XFS_IALLOC_SPACE_RES(mp
) : 0);
2888 ASSERT(error
!= ENOSPC
);
2891 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2894 * Bump the in memory version number of the parent directory
2895 * so that other processes accessing it will recognize that
2896 * the directory has changed.
2900 error
= XFS_DIR_INIT(mp
, tp
, cdp
, dp
);
2906 error
= xfs_bumplink(tp
, dp
);
2911 cvp
= XFS_ITOV(cdp
);
2919 * Attach the dquots to the new inode and modify the icount incore.
2921 XFS_QM_DQVOPCREATE(mp
, tp
, cdp
, udqp
, gdqp
);
2924 * If this is a synchronous mount, make sure that the
2925 * mkdir transaction goes to disk before returning to
2928 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2929 xfs_trans_set_sync(tp
);
2932 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
2938 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2939 XFS_QM_DQRELE(mp
, udqp
);
2940 XFS_QM_DQRELE(mp
, gdqp
);
2945 /* Fall through to std_return with error = 0 or errno from
2946 * xfs_trans_commit. */
2949 if ( (created
|| (error
!= 0 && dm_event_sent
!= 0)) &&
2950 DM_EVENT_ENABLED(dir_vp
->v_vfsp
, XFS_BHVTOI(dir_bdp
),
2951 DM_EVENT_POSTCREATE
)) {
2952 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTCREATE
,
2953 dir_vp
, DM_RIGHT_NULL
,
2954 created
? XFS_ITOV(cdp
):NULL
,
2957 dm_di_mode
, error
, 0);
2963 xfs_bmap_cancel(&free_list
);
2965 cancel_flags
|= XFS_TRANS_ABORT
;
2967 xfs_trans_cancel(tp
, cancel_flags
);
2968 XFS_QM_DQRELE(mp
, udqp
);
2969 XFS_QM_DQRELE(mp
, gdqp
);
2971 if (!dp_joined_to_trans
&& (dp
!= NULL
)) {
2972 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2985 bhv_desc_t
*dir_bdp
,
2989 char *name
= VNAME(dentry
);
2991 xfs_inode_t
*cdp
; /* child directory */
2995 xfs_bmap_free_t free_list
;
2996 xfs_fsblock_t first_block
;
3005 dir_vp
= BHV_TO_VNODE(dir_bdp
);
3006 dp
= XFS_BHVTOI(dir_bdp
);
3009 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
3011 if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp
)->i_mount
))
3012 return XFS_ERROR(EIO
);
3013 namelen
= VNAMELEN(dentry
);
3015 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_REMOVE
)) {
3016 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_REMOVE
,
3017 dir_vp
, DM_RIGHT_NULL
,
3018 NULL
, DM_RIGHT_NULL
,
3019 name
, NULL
, 0, 0, 0);
3021 return XFS_ERROR(error
);
3024 /* Return through std_return after this point. */
3029 * We need to get a reference to cdp before we get our log
3030 * reservation. The reason for this is that we cannot call
3031 * xfs_iget for an inode for which we do not have a reference
3032 * once we've acquired a log reservation. This is because the
3033 * inode we are trying to get might be in xfs_inactive going
3034 * for a log reservation. Since we'll have to wait for the
3035 * inactive code to complete before returning from xfs_iget,
3036 * we need to make sure that we don't have log space reserved
3037 * when we call xfs_iget. Instead we get an unlocked referece
3038 * to the inode before getting our log reservation.
3040 error
= xfs_get_dir_entry(dentry
, &cdp
);
3042 REMOVE_DEBUG_TRACE(__LINE__
);
3046 dm_di_mode
= cdp
->i_d
.di_mode
;
3049 * Get the dquots for the inodes.
3051 error
= XFS_QM_DQATTACH(mp
, dp
, 0);
3052 if (!error
&& dp
!= cdp
)
3053 error
= XFS_QM_DQATTACH(mp
, cdp
, 0);
3056 REMOVE_DEBUG_TRACE(__LINE__
);
3060 tp
= xfs_trans_alloc(mp
, XFS_TRANS_RMDIR
);
3061 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
3063 * We try to get the real space reservation first,
3064 * allowing for directory btree deletion(s) implying
3065 * possible bmap insert(s). If we can't get the space
3066 * reservation then we use 0 instead, and avoid the bmap
3067 * btree insert(s) in the directory code by, if the bmap
3068 * insert tries to happen, instead trimming the LAST
3069 * block from the directory.
3071 resblks
= XFS_REMOVE_SPACE_RES(mp
);
3072 error
= xfs_trans_reserve(tp
, resblks
, XFS_REMOVE_LOG_RES(mp
), 0,
3073 XFS_TRANS_PERM_LOG_RES
, XFS_DEFAULT_LOG_COUNT
);
3074 if (error
== ENOSPC
) {
3076 error
= xfs_trans_reserve(tp
, 0, XFS_REMOVE_LOG_RES(mp
), 0,
3077 XFS_TRANS_PERM_LOG_RES
, XFS_DEFAULT_LOG_COUNT
);
3080 ASSERT(error
!= ENOSPC
);
3085 XFS_BMAP_INIT(&free_list
, &first_block
);
3088 * Now lock the child directory inode and the parent directory
3089 * inode in the proper order. This will take care of validating
3090 * that the directory entry for the child directory inode has
3091 * not changed while we were obtaining a log reservation.
3093 error
= xfs_lock_dir_and_entry(dp
, dentry
, cdp
);
3095 xfs_trans_cancel(tp
, cancel_flags
);
3100 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
3103 * Only increment the parent directory vnode count if
3104 * we didn't bump it in looking up cdp. The only time
3105 * we don't bump it is when we're looking up ".".
3111 xfs_trans_ijoin(tp
, cdp
, XFS_ILOCK_EXCL
);
3113 ASSERT(cdp
->i_d
.di_nlink
>= 2);
3114 if (cdp
->i_d
.di_nlink
!= 2) {
3115 error
= XFS_ERROR(ENOTEMPTY
);
3118 if (!XFS_DIR_ISEMPTY(mp
, cdp
)) {
3119 error
= XFS_ERROR(ENOTEMPTY
);
3123 error
= XFS_DIR_REMOVENAME(mp
, tp
, dp
, name
, namelen
, cdp
->i_ino
,
3124 &first_block
, &free_list
, resblks
);
3129 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
3132 * Bump the in memory generation count on the parent
3133 * directory so that other can know that it has changed.
3138 * Drop the link from cdp's "..".
3140 error
= xfs_droplink(tp
, dp
);
3146 * Drop the link from dp to cdp.
3148 error
= xfs_droplink(tp
, cdp
);
3154 * Drop the "." link from cdp to self.
3156 error
= xfs_droplink(tp
, cdp
);
3161 /* Determine these before committing transaction */
3162 last_cdp_link
= (cdp
)->i_d
.di_nlink
==0;
3165 * Take an extra ref on the child vnode so that it
3166 * does not go to xfs_inactive() from within the commit.
3171 * If this is a synchronous mount, make sure that the
3172 * rmdir transaction goes to disk before returning to
3175 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
3176 xfs_trans_set_sync(tp
);
3179 error
= xfs_bmap_finish (&tp
, &free_list
, first_block
, &committed
);
3181 xfs_bmap_cancel(&free_list
);
3182 xfs_trans_cancel(tp
, (XFS_TRANS_RELEASE_LOG_RES
|
3188 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
3196 * Let interposed file systems know about removed links.
3198 VOP_LINK_REMOVED(XFS_ITOV(cdp
), dir_vp
, last_cdp_link
);
3202 /* Fall through to std_return with error = 0 or the errno
3203 * from xfs_trans_commit. */
3205 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_POSTREMOVE
)) {
3206 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTREMOVE
,
3207 dir_vp
, DM_RIGHT_NULL
,
3208 NULL
, DM_RIGHT_NULL
,
3209 name
, NULL
, dm_di_mode
,
3215 xfs_bmap_cancel(&free_list
);
3216 cancel_flags
|= XFS_TRANS_ABORT
;
3218 xfs_trans_cancel(tp
, cancel_flags
);
3226 * Read dp's entries starting at uiop->uio_offset and translate them into
3227 * bufsize bytes worth of struct dirents starting at bufbase.
3231 bhv_desc_t
*dir_bdp
,
3237 xfs_trans_t
*tp
= NULL
;
3240 xfs_off_t start_offset
;
3242 vn_trace_entry(BHV_TO_VNODE(dir_bdp
), __FUNCTION__
,
3243 (inst_t
*)__return_address
);
3244 dp
= XFS_BHVTOI(dir_bdp
);
3246 if (XFS_FORCED_SHUTDOWN(dp
->i_mount
)) {
3247 return XFS_ERROR(EIO
);
3250 lock_mode
= xfs_ilock_map_shared(dp
);
3251 start_offset
= uiop
->uio_offset
;
3252 error
= XFS_DIR_GETDENTS(dp
->i_mount
, tp
, dp
, uiop
, eofp
);
3253 if (start_offset
!= uiop
->uio_offset
) {
3254 xfs_ichgtime(dp
, XFS_ICHGTIME_ACC
);
3256 xfs_iunlock_map_shared(dp
, lock_mode
);
3267 bhv_desc_t
*dir_bdp
,
3280 xfs_bmap_free_t free_list
;
3281 xfs_fsblock_t first_block
;
3282 boolean_t dp_joined_to_trans
;
3286 xfs_fileoff_t first_fsb
;
3287 xfs_filblks_t fs_blocks
;
3289 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
3296 struct xfs_dquot
*udqp
, *gdqp
;
3298 char *link_name
= VNAME(dentry
);
3302 dir_vp
= BHV_TO_VNODE(dir_bdp
);
3303 dp
= XFS_BHVTOI(dir_bdp
);
3304 dp_joined_to_trans
= B_FALSE
;
3309 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
3313 if (XFS_FORCED_SHUTDOWN(mp
))
3314 return XFS_ERROR(EIO
);
3316 link_namelen
= VNAMELEN(dentry
);
3319 * Check component lengths of the target path name.
3321 pathlen
= strlen(target_path
);
3322 if (pathlen
>= MAXPATHLEN
) /* total string too long */
3323 return XFS_ERROR(ENAMETOOLONG
);
3324 if (pathlen
>= MAXNAMELEN
) { /* is any component too long? */
3328 for(total
= 0, path
= target_path
; total
< pathlen
;) {
3332 while(*path
== '/') {
3338 * Count up to the next slash or end of path.
3339 * Error out if the component is bigger than MAXNAMELEN.
3341 for(len
= 0; *path
!= '/' && total
< pathlen
;total
++, path
++) {
3342 if (++len
>= MAXNAMELEN
) {
3343 error
= ENAMETOOLONG
;
3350 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_SYMLINK
)) {
3351 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_SYMLINK
, dir_vp
,
3352 DM_RIGHT_NULL
, NULL
, DM_RIGHT_NULL
,
3353 link_name
, target_path
, 0, 0, 0);
3358 /* Return through std_return after this point. */
3361 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
3362 prid
= dp
->i_d
.di_projid
;
3363 else if (vap
->va_mask
& XFS_AT_PROJID
)
3364 prid
= (xfs_prid_t
)vap
->va_projid
;
3366 prid
= (xfs_prid_t
)dfltprid
;
3369 * Make sure that we have allocated dquot(s) on disk.
3371 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
3372 current_fsuid(credp
), current_fsgid(credp
), prid
,
3373 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
3377 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SYMLINK
);
3378 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
3380 * The symlink will fit into the inode data fork?
3381 * There can't be any attributes so we get the whole variable part.
3383 if (pathlen
<= XFS_LITINO(mp
))
3386 fs_blocks
= XFS_B_TO_FSB(mp
, pathlen
);
3387 resblks
= XFS_SYMLINK_SPACE_RES(mp
, link_namelen
, fs_blocks
);
3388 error
= xfs_trans_reserve(tp
, resblks
, XFS_SYMLINK_LOG_RES(mp
), 0,
3389 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
3390 if (error
== ENOSPC
&& fs_blocks
== 0) {
3392 error
= xfs_trans_reserve(tp
, 0, XFS_SYMLINK_LOG_RES(mp
), 0,
3393 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
3401 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
3404 * Check whether the directory allows new symlinks or not.
3406 if (dp
->i_d
.di_flags
& XFS_DIFLAG_NOSYMLINKS
) {
3407 error
= XFS_ERROR(EPERM
);
3412 * Reserve disk quota : blocks and inode.
3414 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
3419 * Check for ability to enter directory entry, if no space reserved.
3422 (error
= XFS_DIR_CANENTER(mp
, tp
, dp
, link_name
, link_namelen
)))
3425 * Initialize the bmap freelist prior to calling either
3426 * bmapi or the directory create code.
3428 XFS_BMAP_INIT(&free_list
, &first_block
);
3431 * Allocate an inode for the symlink.
3433 error
= xfs_dir_ialloc(&tp
, dp
, S_IFLNK
| (vap
->va_mode
&~S_IFMT
),
3434 1, 0, credp
, prid
, resblks
> 0, &ip
, NULL
);
3436 if (error
== ENOSPC
)
3443 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
3444 dp_joined_to_trans
= B_TRUE
;
3447 * Also attach the dquot(s) to it, if applicable.
3449 XFS_QM_DQVOPCREATE(mp
, tp
, ip
, udqp
, gdqp
);
3452 resblks
-= XFS_IALLOC_SPACE_RES(mp
);
3454 * If the symlink will fit into the inode, write it inline.
3456 if (pathlen
<= XFS_IFORK_DSIZE(ip
)) {
3457 xfs_idata_realloc(ip
, pathlen
, XFS_DATA_FORK
);
3458 memcpy(ip
->i_df
.if_u1
.if_data
, target_path
, pathlen
);
3459 ip
->i_d
.di_size
= pathlen
;
3462 * The inode was initially created in extent format.
3464 ip
->i_df
.if_flags
&= ~(XFS_IFEXTENTS
| XFS_IFBROOT
);
3465 ip
->i_df
.if_flags
|= XFS_IFINLINE
;
3467 ip
->i_d
.di_format
= XFS_DINODE_FMT_LOCAL
;
3468 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_DDATA
| XFS_ILOG_CORE
);
3472 nmaps
= SYMLINK_MAPS
;
3474 error
= xfs_bmapi(tp
, ip
, first_fsb
, fs_blocks
,
3475 XFS_BMAPI_WRITE
| XFS_BMAPI_METADATA
,
3476 &first_block
, resblks
, mval
, &nmaps
,
3483 resblks
-= fs_blocks
;
3484 ip
->i_d
.di_size
= pathlen
;
3485 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
3487 cur_chunk
= target_path
;
3488 for (n
= 0; n
< nmaps
; n
++) {
3489 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
3490 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
3491 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
, d
,
3492 BTOBB(byte_cnt
), 0);
3493 ASSERT(bp
&& !XFS_BUF_GETERROR(bp
));
3494 if (pathlen
< byte_cnt
) {
3497 pathlen
-= byte_cnt
;
3499 memcpy(XFS_BUF_PTR(bp
), cur_chunk
, byte_cnt
);
3500 cur_chunk
+= byte_cnt
;
3502 xfs_trans_log_buf(tp
, bp
, 0, byte_cnt
- 1);
3507 * Create the directory entry for the symlink.
3509 error
= XFS_DIR_CREATENAME(mp
, tp
, dp
, link_name
, link_namelen
,
3510 ip
->i_ino
, &first_block
, &free_list
, resblks
);
3514 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
3515 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
3518 * Bump the in memory version number of the parent directory
3519 * so that other processes accessing it will recognize that
3520 * the directory has changed.
3525 * If this is a synchronous mount, make sure that the
3526 * symlink transaction goes to disk before returning to
3529 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
3530 xfs_trans_set_sync(tp
);
3534 * xfs_trans_commit normally decrements the vnode ref count
3535 * when it unlocks the inode. Since we want to return the
3536 * vnode to the caller, we bump the vnode ref count now.
3540 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
3544 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
3545 XFS_QM_DQRELE(mp
, udqp
);
3546 XFS_QM_DQRELE(mp
, gdqp
);
3548 /* Fall through to std_return with error = 0 or errno from
3549 * xfs_trans_commit */
3551 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, XFS_BHVTOI(dir_bdp
),
3552 DM_EVENT_POSTSYMLINK
)) {
3553 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTSYMLINK
,
3554 dir_vp
, DM_RIGHT_NULL
,
3555 error
? NULL
: XFS_ITOV(ip
),
3556 DM_RIGHT_NULL
, link_name
, target_path
,
3572 xfs_bmap_cancel(&free_list
);
3573 cancel_flags
|= XFS_TRANS_ABORT
;
3575 xfs_trans_cancel(tp
, cancel_flags
);
3576 XFS_QM_DQRELE(mp
, udqp
);
3577 XFS_QM_DQRELE(mp
, gdqp
);
3579 if (!dp_joined_to_trans
&& (dp
!= NULL
)) {
3580 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
3590 * A fid routine that takes a pointer to a previously allocated
3591 * fid structure (like xfs_fast_fid) but uses a 64 bit inode number.
3601 vn_trace_entry(BHV_TO_VNODE(bdp
), __FUNCTION__
,
3602 (inst_t
*)__return_address
);
3603 ASSERT(sizeof(fid_t
) >= sizeof(xfs_fid2_t
));
3605 xfid
= (xfs_fid2_t
*)fidp
;
3606 ip
= XFS_BHVTOI(bdp
);
3607 xfid
->fid_len
= sizeof(xfs_fid2_t
) - sizeof(xfid
->fid_len
);
3610 * use memcpy because the inode is a long long and there's no
3611 * assurance that xfid->fid_ino is properly aligned.
3613 memcpy(&xfid
->fid_ino
, &ip
->i_ino
, sizeof(xfid
->fid_ino
));
3614 xfid
->fid_gen
= ip
->i_d
.di_gen
;
3631 vp
= BHV_TO_VNODE(bdp
);
3634 ip
= XFS_BHVTOI(bdp
);
3635 if (locktype
== VRWLOCK_WRITE
) {
3636 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
3637 } else if (locktype
== VRWLOCK_TRY_READ
) {
3638 return (xfs_ilock_nowait(ip
, XFS_IOLOCK_SHARED
));
3639 } else if (locktype
== VRWLOCK_TRY_WRITE
) {
3640 return (xfs_ilock_nowait(ip
, XFS_IOLOCK_EXCL
));
3642 ASSERT((locktype
== VRWLOCK_READ
) ||
3643 (locktype
== VRWLOCK_WRITE_DIRECT
));
3644 xfs_ilock(ip
, XFS_IOLOCK_SHARED
);
3662 vp
= BHV_TO_VNODE(bdp
);
3665 ip
= XFS_BHVTOI(bdp
);
3666 if (locktype
== VRWLOCK_WRITE
) {
3668 * In the write case, we may have added a new entry to
3669 * the reference cache. This might store a pointer to
3670 * an inode to be released in this inode. If it is there,
3671 * clear the pointer and release the inode after unlocking
3674 xfs_refcache_iunlock(ip
, XFS_IOLOCK_EXCL
);
3676 ASSERT((locktype
== VRWLOCK_READ
) ||
3677 (locktype
== VRWLOCK_WRITE_DIRECT
));
3678 xfs_iunlock(ip
, XFS_IOLOCK_SHARED
);
3690 xfs_inode_log_item_t
*iip
;
3693 ip
= XFS_BHVTOI(bdp
);
3697 if (XFS_FORCED_SHUTDOWN(mp
))
3698 return XFS_ERROR(EIO
);
3701 * Bypass inodes which have already been cleaned by
3702 * the inode flush clustering code inside xfs_iflush
3704 if ((ip
->i_update_core
== 0) &&
3705 ((iip
== NULL
) || !(iip
->ili_format
.ilf_fields
& XFS_ILOG_ALL
)))
3708 if (flags
& FLUSH_LOG
) {
3709 if (iip
&& iip
->ili_last_lsn
) {
3710 xlog_t
*log
= mp
->m_log
;
3712 int s
, log_flags
= XFS_LOG_FORCE
;
3714 s
= GRANT_LOCK(log
);
3715 sync_lsn
= log
->l_last_sync_lsn
;
3716 GRANT_UNLOCK(log
, s
);
3718 if ((XFS_LSN_CMP(iip
->ili_last_lsn
, sync_lsn
) <= 0))
3721 if (flags
& FLUSH_SYNC
)
3722 log_flags
|= XFS_LOG_SYNC
;
3723 return xfs_log_force(mp
, iip
->ili_last_lsn
, log_flags
);
3728 * We make this non-blocking if the inode is contended,
3729 * return EAGAIN to indicate to the caller that they
3730 * did not succeed. This prevents the flush path from
3731 * blocking on inodes inside another operation right
3732 * now, they get caught later by xfs_sync.
3734 if (flags
& FLUSH_INODE
) {
3737 if (xfs_ipincount(ip
))
3740 if (flags
& FLUSH_SYNC
) {
3741 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
3743 } else if (xfs_ilock_nowait(ip
, XFS_ILOCK_SHARED
)) {
3744 if (xfs_ipincount(ip
) || !xfs_iflock_nowait(ip
)) {
3745 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
3752 if (flags
& FLUSH_SYNC
)
3753 flush_flags
= XFS_IFLUSH_SYNC
;
3755 flush_flags
= XFS_IFLUSH_ASYNC
;
3757 error
= xfs_iflush(ip
, flush_flags
);
3758 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
3777 if (!capable(CAP_SYS_ADMIN
))
3778 return XFS_ERROR(EPERM
);
3780 ip
= XFS_BHVTOI(bdp
);
3783 if (XFS_FORCED_SHUTDOWN(mp
))
3784 return XFS_ERROR(EIO
);
3786 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SET_DMATTRS
);
3787 error
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES (mp
), 0, 0, 0);
3789 xfs_trans_cancel(tp
, 0);
3792 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3793 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3795 ip
->i_iocore
.io_dmevmask
= ip
->i_d
.di_dmevmask
= evmask
;
3796 ip
->i_iocore
.io_dmstate
= ip
->i_d
.di_dmstate
= state
;
3798 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
3800 error
= xfs_trans_commit(tp
, 0, NULL
);
3816 vp
= BHV_TO_VNODE(bdp
);
3817 ip
= XFS_BHVTOI(bdp
);
3819 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
3821 ASSERT(!VN_MAPPED(vp
));
3823 /* bad inode, get out here ASAP */
3831 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
3832 ASSERT(VN_CACHED(vp
) == 0);
3834 /* If we have nothing to flush with this inode then complete the
3835 * teardown now, otherwise break the link between the xfs inode
3836 * and the linux inode and clean up the xfs inode later. This
3837 * avoids flushing the inode to disk during the delete operation
3840 if (!ip
->i_update_core
&& (ip
->i_itemp
== NULL
)) {
3841 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3843 return xfs_finish_reclaim(ip
, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC
);
3845 xfs_mount_t
*mp
= ip
->i_mount
;
3847 /* Protect sync from us */
3848 XFS_MOUNT_ILOCK(mp
);
3849 vn_bhv_remove(VN_BHV_HEAD(vp
), XFS_ITOBHV(ip
));
3850 list_add_tail(&ip
->i_reclaim
, &mp
->m_del_inodes
);
3851 ip
->i_flags
|= XFS_IRECLAIMABLE
;
3852 XFS_MOUNT_IUNLOCK(mp
);
3863 xfs_ihash_t
*ih
= ip
->i_hash
;
3864 vnode_t
*vp
= XFS_ITOV_NULL(ip
);
3867 if (vp
&& VN_BAD(vp
))
3870 /* The hash lock here protects a thread in xfs_iget_core from
3871 * racing with us on linking the inode back with a vnode.
3872 * Once we have the XFS_IRECLAIM flag set it will not touch
3875 write_lock(&ih
->ih_lock
);
3876 if ((ip
->i_flags
& XFS_IRECLAIM
) ||
3877 (!(ip
->i_flags
& XFS_IRECLAIMABLE
) && vp
== NULL
)) {
3878 write_unlock(&ih
->ih_lock
);
3881 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3885 ip
->i_flags
|= XFS_IRECLAIM
;
3886 write_unlock(&ih
->ih_lock
);
3889 * If the inode is still dirty, then flush it out. If the inode
3890 * is not in the AIL, then it will be OK to flush it delwri as
3891 * long as xfs_iflush() does not keep any references to the inode.
3892 * We leave that decision up to xfs_iflush() since it has the
3893 * knowledge of whether it's OK to simply do a delwri flush of
3894 * the inode or whether we need to wait until the inode is
3895 * pulled from the AIL.
3896 * We get the flush lock regardless, though, just to make sure
3897 * we don't free it while it is being flushed.
3899 if (!XFS_FORCED_SHUTDOWN(ip
->i_mount
)) {
3901 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3905 if (ip
->i_update_core
||
3906 ((ip
->i_itemp
!= NULL
) &&
3907 (ip
->i_itemp
->ili_format
.ilf_fields
!= 0))) {
3908 error
= xfs_iflush(ip
, sync_mode
);
3910 * If we hit an error, typically because of filesystem
3911 * shutdown, we don't need to let vn_reclaim to know
3912 * because we're gonna reclaim the inode anyway.
3915 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3918 xfs_iflock(ip
); /* synchronize with xfs_iflush_done */
3921 ASSERT(ip
->i_update_core
== 0);
3922 ASSERT(ip
->i_itemp
== NULL
||
3923 ip
->i_itemp
->ili_format
.ilf_fields
== 0);
3924 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3925 } else if (locked
) {
3927 * We are not interested in doing an iflush if we're
3928 * in the process of shutting down the filesystem forcibly.
3929 * So, just reclaim the inode.
3932 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3941 xfs_finish_reclaim_all(xfs_mount_t
*mp
, int noblock
)
3944 xfs_inode_t
*ip
, *n
;
3949 XFS_MOUNT_ILOCK(mp
);
3950 list_for_each_entry_safe(ip
, n
, &mp
->m_del_inodes
, i_reclaim
) {
3952 if (xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
) == 0)
3954 if (xfs_ipincount(ip
) ||
3955 !xfs_iflock_nowait(ip
)) {
3956 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3960 XFS_MOUNT_IUNLOCK(mp
);
3961 if (xfs_finish_reclaim(ip
, noblock
,
3962 XFS_IFLUSH_DELWRI_ELSE_ASYNC
))
3971 XFS_MOUNT_IUNLOCK(mp
);
3976 * xfs_alloc_file_space()
3977 * This routine allocates disk space for the given file.
3979 * If alloc_type == 0, this request is for an ALLOCSP type
3980 * request which will change the file size. In this case, no
3981 * DMAPI event will be generated by the call. A TRUNCATE event
3982 * will be generated later by xfs_setattr.
3984 * If alloc_type != 0, this request is for a RESVSP type
3985 * request, and a DMAPI DM_EVENT_WRITE will be generated if the
3986 * lower block boundary byte address is less than the file's
3995 xfs_alloc_file_space(
4002 xfs_filblks_t allocated_fsb
;
4003 xfs_filblks_t allocatesize_fsb
;
4006 xfs_filblks_t datablocks
;
4008 xfs_fsblock_t firstfsb
;
4009 xfs_bmap_free_t free_list
;
4010 xfs_bmbt_irec_t
*imapp
;
4011 xfs_bmbt_irec_t imaps
[1];
4018 xfs_fileoff_t startoffset_fsb
;
4020 int xfs_bmapi_flags
;
4022 vn_trace_entry(XFS_ITOV(ip
), __FUNCTION__
, (inst_t
*)__return_address
);
4025 if (XFS_FORCED_SHUTDOWN(mp
))
4026 return XFS_ERROR(EIO
);
4029 * determine if this is a realtime file
4031 if ((rt
= XFS_IS_REALTIME_INODE(ip
)) != 0) {
4032 if (ip
->i_d
.di_extsize
)
4033 rtextsize
= ip
->i_d
.di_extsize
;
4035 rtextsize
= mp
->m_sb
.sb_rextsize
;
4039 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
4043 return XFS_ERROR(EINVAL
);
4049 xfs_bmapi_flags
= XFS_BMAPI_WRITE
| (alloc_type
? XFS_BMAPI_PREALLOC
: 0);
4050 startoffset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
4051 allocatesize_fsb
= XFS_B_TO_FSB(mp
, count
);
4053 /* Generate a DMAPI event if needed. */
4054 if (alloc_type
!= 0 && offset
< ip
->i_d
.di_size
&&
4055 (attr_flags
&ATTR_DMI
) == 0 &&
4056 DM_EVENT_ENABLED(XFS_MTOVFS(mp
), ip
, DM_EVENT_WRITE
)) {
4057 xfs_off_t end_dmi_offset
;
4059 end_dmi_offset
= offset
+len
;
4060 if (end_dmi_offset
> ip
->i_d
.di_size
)
4061 end_dmi_offset
= ip
->i_d
.di_size
;
4062 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, XFS_ITOV(ip
),
4063 offset
, end_dmi_offset
- offset
,
4070 * allocate file space until done or until there is an error
4073 while (allocatesize_fsb
&& !error
) {
4075 * determine if reserving space on
4076 * the data or realtime partition.
4081 s
= startoffset_fsb
;
4082 do_div(s
, rtextsize
);
4084 e
= roundup_64(startoffset_fsb
+ allocatesize_fsb
,
4086 numrtextents
= (int)(e
- s
) / mp
->m_sb
.sb_rextsize
;
4089 datablocks
= allocatesize_fsb
;
4094 * allocate and setup the transaction
4096 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
4097 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, datablocks
);
4098 error
= xfs_trans_reserve(tp
,
4100 XFS_WRITE_LOG_RES(mp
),
4102 XFS_TRANS_PERM_LOG_RES
,
4103 XFS_WRITE_LOG_COUNT
);
4106 * check for running out of space
4110 * Free the transaction structure.
4112 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
4113 xfs_trans_cancel(tp
, 0);
4116 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
4117 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
,
4118 ip
->i_udquot
, ip
->i_gdquot
, resblks
, 0, 0);
4122 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
4123 xfs_trans_ihold(tp
, ip
);
4126 * issue the bmapi() call to allocate the blocks
4128 XFS_BMAP_INIT(&free_list
, &firstfsb
);
4129 error
= xfs_bmapi(tp
, ip
, startoffset_fsb
,
4130 allocatesize_fsb
, xfs_bmapi_flags
,
4131 &firstfsb
, 0, imapp
, &reccount
,
4138 * complete the transaction
4140 error
= xfs_bmap_finish(&tp
, &free_list
, firstfsb
, &committed
);
4145 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
4146 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4151 allocated_fsb
= imapp
->br_blockcount
;
4153 if (reccount
== 0) {
4154 error
= XFS_ERROR(ENOSPC
);
4158 startoffset_fsb
+= allocated_fsb
;
4159 allocatesize_fsb
-= allocated_fsb
;
4162 if (error
== ENOSPC
&& (attr_flags
&ATTR_DMI
) == 0 &&
4163 DM_EVENT_ENABLED(XFS_MTOVFS(mp
), ip
, DM_EVENT_NOSPACE
)) {
4165 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_NOSPACE
,
4166 XFS_ITOV(ip
), DM_RIGHT_NULL
,
4167 XFS_ITOV(ip
), DM_RIGHT_NULL
,
4168 NULL
, NULL
, 0, 0, 0); /* Delay flag intentionally unused */
4170 goto retry
; /* Maybe DMAPI app. has made space */
4171 /* else fall through with error from XFS_SEND_DATA */
4177 xfs_bmap_cancel(&free_list
);
4179 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
4180 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4181 goto dmapi_enospc_check
;
4185 * Zero file bytes between startoff and endoff inclusive.
4186 * The iolock is held exclusive and no blocks are buffered.
4189 xfs_zero_remaining_bytes(
4194 xfs_bmbt_irec_t imap
;
4195 xfs_fileoff_t offset_fsb
;
4196 xfs_off_t lastoffset
;
4199 xfs_mount_t
*mp
= ip
->i_mount
;
4203 bp
= xfs_buf_get_noaddr(mp
->m_sb
.sb_blocksize
,
4204 ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
?
4205 mp
->m_rtdev_targp
: mp
->m_ddev_targp
);
4207 for (offset
= startoff
; offset
<= endoff
; offset
= lastoffset
+ 1) {
4208 offset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
4210 error
= xfs_bmapi(NULL
, ip
, offset_fsb
, 1, 0, NULL
, 0, &imap
,
4212 if (error
|| nimap
< 1)
4214 ASSERT(imap
.br_blockcount
>= 1);
4215 ASSERT(imap
.br_startoff
== offset_fsb
);
4216 lastoffset
= XFS_FSB_TO_B(mp
, imap
.br_startoff
+ 1) - 1;
4217 if (lastoffset
> endoff
)
4218 lastoffset
= endoff
;
4219 if (imap
.br_startblock
== HOLESTARTBLOCK
)
4221 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
4222 if (imap
.br_state
== XFS_EXT_UNWRITTEN
)
4225 XFS_BUF_UNWRITE(bp
);
4227 XFS_BUF_SET_ADDR(bp
, XFS_FSB_TO_DB(ip
, imap
.br_startblock
));
4229 if ((error
= xfs_iowait(bp
))) {
4230 xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
4231 mp
, bp
, XFS_BUF_ADDR(bp
));
4234 memset(XFS_BUF_PTR(bp
) +
4235 (offset
- XFS_FSB_TO_B(mp
, imap
.br_startoff
)),
4236 0, lastoffset
- offset
+ 1);
4241 if ((error
= xfs_iowait(bp
))) {
4242 xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
4243 mp
, bp
, XFS_BUF_ADDR(bp
));
4252 * xfs_free_file_space()
4253 * This routine frees disk space for the given file.
4255 * This routine is only called by xfs_change_file_space
4256 * for an UNRESVSP type call.
4264 xfs_free_file_space(
4273 xfs_off_t end_dmi_offset
;
4274 xfs_fileoff_t endoffset_fsb
;
4276 xfs_fsblock_t firstfsb
;
4277 xfs_bmap_free_t free_list
;
4279 xfs_bmbt_irec_t imap
;
4287 xfs_fileoff_t startoffset_fsb
;
4289 int need_iolock
= 1;
4294 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
4296 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
4300 if (len
<= 0) /* if nothing being freed */
4302 rt
= (ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
);
4303 startoffset_fsb
= XFS_B_TO_FSB(mp
, offset
);
4304 end_dmi_offset
= offset
+ len
;
4305 endoffset_fsb
= XFS_B_TO_FSBT(mp
, end_dmi_offset
);
4307 if (offset
< ip
->i_d
.di_size
&&
4308 (attr_flags
& ATTR_DMI
) == 0 &&
4309 DM_EVENT_ENABLED(XFS_MTOVFS(mp
), ip
, DM_EVENT_WRITE
)) {
4310 if (end_dmi_offset
> ip
->i_d
.di_size
)
4311 end_dmi_offset
= ip
->i_d
.di_size
;
4312 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, vp
,
4313 offset
, end_dmi_offset
- offset
,
4314 AT_DELAY_FLAG(attr_flags
), NULL
);
4319 ASSERT(attr_flags
& ATTR_NOLOCK
? attr_flags
& ATTR_DMI
: 1);
4320 if (attr_flags
& ATTR_NOLOCK
)
4323 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
4325 rounding
= MAX((__uint8_t
)(1 << mp
->m_sb
.sb_blocklog
),
4327 ilen
= len
+ (offset
& (rounding
- 1));
4328 ioffset
= offset
& ~(rounding
- 1);
4329 if (ilen
& (rounding
- 1))
4330 ilen
= (ilen
+ rounding
) & ~(rounding
- 1);
4332 if (VN_CACHED(vp
) != 0) {
4333 xfs_inval_cached_trace(&ip
->i_iocore
, ioffset
, -1,
4334 ctooff(offtoct(ioffset
)), -1);
4335 VOP_FLUSHINVAL_PAGES(vp
, ctooff(offtoct(ioffset
)),
4336 -1, FI_REMAPF_LOCKED
);
4340 * Need to zero the stuff we're not freeing, on disk.
4341 * If its a realtime file & can't use unwritten extents then we
4342 * actually need to zero the extent edges. Otherwise xfs_bunmapi
4343 * will take care of it for us.
4345 if (rt
&& !XFS_SB_VERSION_HASEXTFLGBIT(&mp
->m_sb
)) {
4347 error
= xfs_bmapi(NULL
, ip
, startoffset_fsb
, 1, 0, NULL
, 0,
4348 &imap
, &nimap
, NULL
);
4350 goto out_unlock_iolock
;
4351 ASSERT(nimap
== 0 || nimap
== 1);
4352 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
4355 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
4356 block
= imap
.br_startblock
;
4357 mod
= do_div(block
, mp
->m_sb
.sb_rextsize
);
4359 startoffset_fsb
+= mp
->m_sb
.sb_rextsize
- mod
;
4362 error
= xfs_bmapi(NULL
, ip
, endoffset_fsb
- 1, 1, 0, NULL
, 0,
4363 &imap
, &nimap
, NULL
);
4365 goto out_unlock_iolock
;
4366 ASSERT(nimap
== 0 || nimap
== 1);
4367 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
4368 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
4370 if (mod
&& (mod
!= mp
->m_sb
.sb_rextsize
))
4371 endoffset_fsb
-= mod
;
4374 if ((done
= (endoffset_fsb
<= startoffset_fsb
)))
4376 * One contiguous piece to clear
4378 error
= xfs_zero_remaining_bytes(ip
, offset
, offset
+ len
- 1);
4381 * Some full blocks, possibly two pieces to clear
4383 if (offset
< XFS_FSB_TO_B(mp
, startoffset_fsb
))
4384 error
= xfs_zero_remaining_bytes(ip
, offset
,
4385 XFS_FSB_TO_B(mp
, startoffset_fsb
) - 1);
4387 XFS_FSB_TO_B(mp
, endoffset_fsb
) < offset
+ len
)
4388 error
= xfs_zero_remaining_bytes(ip
,
4389 XFS_FSB_TO_B(mp
, endoffset_fsb
),
4394 * free file space until done or until there is an error
4396 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, 0);
4397 while (!error
&& !done
) {
4400 * allocate and setup the transaction
4402 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
4403 error
= xfs_trans_reserve(tp
,
4405 XFS_WRITE_LOG_RES(mp
),
4407 XFS_TRANS_PERM_LOG_RES
,
4408 XFS_WRITE_LOG_COUNT
);
4411 * check for running out of space
4415 * Free the transaction structure.
4417 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
4418 xfs_trans_cancel(tp
, 0);
4421 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
4422 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
,
4423 ip
->i_udquot
, ip
->i_gdquot
, resblks
, 0, rt
?
4424 XFS_QMOPT_RES_RTBLKS
: XFS_QMOPT_RES_REGBLKS
);
4428 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
4429 xfs_trans_ihold(tp
, ip
);
4432 * issue the bunmapi() call to free the blocks
4434 XFS_BMAP_INIT(&free_list
, &firstfsb
);
4435 error
= xfs_bunmapi(tp
, ip
, startoffset_fsb
,
4436 endoffset_fsb
- startoffset_fsb
,
4437 0, 2, &firstfsb
, &free_list
, &done
);
4443 * complete the transaction
4445 error
= xfs_bmap_finish(&tp
, &free_list
, firstfsb
, &committed
);
4450 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
4451 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4456 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
4460 xfs_bmap_cancel(&free_list
);
4462 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
4463 xfs_iunlock(ip
, need_iolock
? (XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
) :
4469 * xfs_change_file_space()
4470 * This routine allocates or frees disk space for the given file.
4471 * The user specified parameters are checked for alignment and size
4480 xfs_change_file_space(
4494 xfs_off_t startoffset
;
4500 vp
= BHV_TO_VNODE(bdp
);
4501 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
4503 ip
= XFS_BHVTOI(bdp
);
4507 * must be a regular file and have write permission
4510 return XFS_ERROR(EINVAL
);
4512 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
4514 if ((error
= xfs_iaccess(ip
, S_IWUSR
, credp
))) {
4515 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
4519 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
4521 switch (bf
->l_whence
) {
4522 case 0: /*SEEK_SET*/
4524 case 1: /*SEEK_CUR*/
4525 bf
->l_start
+= offset
;
4527 case 2: /*SEEK_END*/
4528 bf
->l_start
+= ip
->i_d
.di_size
;
4531 return XFS_ERROR(EINVAL
);
4534 llen
= bf
->l_len
> 0 ? bf
->l_len
- 1 : bf
->l_len
;
4536 if ( (bf
->l_start
< 0)
4537 || (bf
->l_start
> XFS_MAXIOFFSET(mp
))
4538 || (bf
->l_start
+ llen
< 0)
4539 || (bf
->l_start
+ llen
> XFS_MAXIOFFSET(mp
)))
4540 return XFS_ERROR(EINVAL
);
4544 startoffset
= bf
->l_start
;
4545 fsize
= ip
->i_d
.di_size
;
4548 * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
4550 * These calls do NOT zero the data space allocated to the file,
4551 * nor do they change the file size.
4553 * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
4555 * These calls cause the new file data to be zeroed and the file
4556 * size to be changed.
4558 setprealloc
= clrprealloc
= 0;
4561 case XFS_IOC_RESVSP
:
4562 case XFS_IOC_RESVSP64
:
4563 error
= xfs_alloc_file_space(ip
, startoffset
, bf
->l_len
,
4570 case XFS_IOC_UNRESVSP
:
4571 case XFS_IOC_UNRESVSP64
:
4572 if ((error
= xfs_free_file_space(ip
, startoffset
, bf
->l_len
,
4577 case XFS_IOC_ALLOCSP
:
4578 case XFS_IOC_ALLOCSP64
:
4579 case XFS_IOC_FREESP
:
4580 case XFS_IOC_FREESP64
:
4581 if (startoffset
> fsize
) {
4582 error
= xfs_alloc_file_space(ip
, fsize
,
4583 startoffset
- fsize
, 0, attr_flags
);
4588 va
.va_mask
= XFS_AT_SIZE
;
4589 va
.va_size
= startoffset
;
4591 error
= xfs_setattr(bdp
, &va
, attr_flags
, credp
);
4601 return XFS_ERROR(EINVAL
);
4605 * update the inode timestamp, mode, and prealloc flag bits
4607 tp
= xfs_trans_alloc(mp
, XFS_TRANS_WRITEID
);
4609 if ((error
= xfs_trans_reserve(tp
, 0, XFS_WRITEID_LOG_RES(mp
),
4612 xfs_trans_cancel(tp
, 0);
4616 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
4618 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
4619 xfs_trans_ihold(tp
, ip
);
4621 if ((attr_flags
& ATTR_DMI
) == 0) {
4622 ip
->i_d
.di_mode
&= ~S_ISUID
;
4625 * Note that we don't have to worry about mandatory
4626 * file locking being disabled here because we only
4627 * clear the S_ISGID bit if the Group execute bit is
4628 * on, but if it was on then mandatory locking wouldn't
4629 * have been enabled.
4631 if (ip
->i_d
.di_mode
& S_IXGRP
)
4632 ip
->i_d
.di_mode
&= ~S_ISGID
;
4634 xfs_ichgtime(ip
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
4637 ip
->i_d
.di_flags
|= XFS_DIFLAG_PREALLOC
;
4638 else if (clrprealloc
)
4639 ip
->i_d
.di_flags
&= ~XFS_DIFLAG_PREALLOC
;
4641 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
4642 xfs_trans_set_sync(tp
);
4644 error
= xfs_trans_commit(tp
, 0, NULL
);
4646 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4651 vnodeops_t xfs_vnodeops
= {
4652 BHV_IDENTITY_INIT(VN_BHV_XFS
,VNODE_POSITION_XFS
),
4653 .vop_open
= xfs_open
,
4654 .vop_read
= xfs_read
,
4655 #ifdef HAVE_SENDFILE
4656 .vop_sendfile
= xfs_sendfile
,
4658 .vop_write
= xfs_write
,
4659 .vop_ioctl
= xfs_ioctl
,
4660 .vop_getattr
= xfs_getattr
,
4661 .vop_setattr
= xfs_setattr
,
4662 .vop_access
= xfs_access
,
4663 .vop_lookup
= xfs_lookup
,
4664 .vop_create
= xfs_create
,
4665 .vop_remove
= xfs_remove
,
4666 .vop_link
= xfs_link
,
4667 .vop_rename
= xfs_rename
,
4668 .vop_mkdir
= xfs_mkdir
,
4669 .vop_rmdir
= xfs_rmdir
,
4670 .vop_readdir
= xfs_readdir
,
4671 .vop_symlink
= xfs_symlink
,
4672 .vop_readlink
= xfs_readlink
,
4673 .vop_fsync
= xfs_fsync
,
4674 .vop_inactive
= xfs_inactive
,
4675 .vop_fid2
= xfs_fid2
,
4676 .vop_rwlock
= xfs_rwlock
,
4677 .vop_rwunlock
= xfs_rwunlock
,
4678 .vop_bmap
= xfs_bmap
,
4679 .vop_reclaim
= xfs_reclaim
,
4680 .vop_attr_get
= xfs_attr_get
,
4681 .vop_attr_set
= xfs_attr_set
,
4682 .vop_attr_remove
= xfs_attr_remove
,
4683 .vop_attr_list
= xfs_attr_list
,
4684 .vop_link_removed
= (vop_link_removed_t
)fs_noval
,
4685 .vop_vnode_change
= (vop_vnode_change_t
)fs_noval
,
4686 .vop_tosspages
= fs_tosspages
,
4687 .vop_flushinval_pages
= fs_flushinval_pages
,
4688 .vop_flush_pages
= fs_flush_pages
,
4689 .vop_release
= xfs_release
,
4690 .vop_iflush
= xfs_inode_flush
,