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
|| ip
->i_delayed_blks
) &&
537 (mask
& XFS_AT_EXTSIZE
) &&
538 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
540 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
545 * Can't set extent size unless the file is marked, or
546 * about to be marked as a realtime file.
548 * This check will be removed when fixed size extents
549 * with buffered data writes is implemented.
552 if ((mask
& XFS_AT_EXTSIZE
) &&
553 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
555 (!((ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
) ||
556 ((mask
& XFS_AT_XFLAGS
) &&
557 (vap
->va_xflags
& XFS_XFLAG_REALTIME
))))) {
558 code
= XFS_ERROR(EINVAL
);
563 * Can't change realtime flag if any extents are allocated.
565 if (ip
->i_d
.di_nextents
&& (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 code
= xfs_igrow_start(ip
, vap
->va_size
, credp
);
631 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
633 code
= xfs_itruncate_data(ip
, vap
->va_size
);
636 lock_flags
&= ~XFS_ILOCK_EXCL
;
637 ASSERT(lock_flags
== XFS_IOLOCK_EXCL
);
640 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_SIZE
);
641 if ((code
= xfs_trans_reserve(tp
, 0,
642 XFS_ITRUNCATE_LOG_RES(mp
), 0,
643 XFS_TRANS_PERM_LOG_RES
,
644 XFS_ITRUNCATE_LOG_COUNT
))) {
645 xfs_trans_cancel(tp
, 0);
647 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
650 commit_flags
= XFS_TRANS_RELEASE_LOG_RES
;
651 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
655 xfs_trans_ijoin(tp
, ip
, lock_flags
);
656 xfs_trans_ihold(tp
, ip
);
659 /* determine whether mandatory locking mode changes */
660 mandlock_before
= MANDLOCK(vp
, ip
->i_d
.di_mode
);
663 * Truncate file. Must have write permission and not be a directory.
665 if (mask
& XFS_AT_SIZE
) {
666 if (vap
->va_size
> ip
->i_d
.di_size
) {
667 xfs_igrow_finish(tp
, ip
, vap
->va_size
,
668 !(flags
& ATTR_DMI
));
669 } else if ((vap
->va_size
<= ip
->i_d
.di_size
) ||
670 ((vap
->va_size
== 0) && ip
->i_d
.di_nextents
)) {
672 * signal a sync transaction unless
673 * we're truncating an already unlinked
674 * file on a wsync filesystem
676 code
= xfs_itruncate_finish(&tp
, ip
,
677 (xfs_fsize_t
)vap
->va_size
,
679 ((ip
->i_d
.di_nlink
!= 0 ||
680 !(mp
->m_flags
& XFS_MOUNT_WSYNC
))
687 * Have to do this even if the file's size doesn't change.
689 timeflags
|= XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
;
693 * Change file access modes.
695 if (mask
& XFS_AT_MODE
) {
696 ip
->i_d
.di_mode
&= S_IFMT
;
697 ip
->i_d
.di_mode
|= vap
->va_mode
& ~S_IFMT
;
699 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
700 timeflags
|= XFS_ICHGTIME_CHG
;
704 * Change file ownership. Must be the owner or privileged.
705 * If the system was configured with the "restricted_chown"
706 * option, the owner is not permitted to give away the file,
707 * and can change the group id only to a group of which he
708 * or she is a member.
710 if (mask
& (XFS_AT_UID
|XFS_AT_GID
|XFS_AT_PROJID
)) {
712 * CAP_FSETID overrides the following restrictions:
714 * The set-user-ID and set-group-ID bits of a file will be
715 * cleared upon successful return from chown()
717 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
718 !capable(CAP_FSETID
)) {
719 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
723 * Change the ownerships and register quota modifications
724 * in the transaction.
727 if (XFS_IS_UQUOTA_ON(mp
)) {
728 ASSERT(mask
& XFS_AT_UID
);
730 olddquot1
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
731 &ip
->i_udquot
, udqp
);
733 ip
->i_d
.di_uid
= uid
;
736 if (XFS_IS_GQUOTA_ON(mp
)) {
737 ASSERT(!XFS_IS_PQUOTA_ON(mp
));
738 ASSERT(mask
& XFS_AT_GID
);
740 olddquot2
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
741 &ip
->i_gdquot
, gdqp
);
743 ip
->i_d
.di_gid
= gid
;
745 if (iprojid
!= projid
) {
746 if (XFS_IS_PQUOTA_ON(mp
)) {
747 ASSERT(!XFS_IS_GQUOTA_ON(mp
));
748 ASSERT(mask
& XFS_AT_PROJID
);
750 olddquot2
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
751 &ip
->i_gdquot
, gdqp
);
753 ip
->i_d
.di_projid
= projid
;
755 * We may have to rev the inode as well as
756 * the superblock version number since projids didn't
757 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
759 if (ip
->i_d
.di_version
== XFS_DINODE_VERSION_1
)
760 xfs_bump_ino_vers2(tp
, ip
);
763 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
764 timeflags
|= XFS_ICHGTIME_CHG
;
769 * Change file access or modified times.
771 if (mask
& (XFS_AT_ATIME
|XFS_AT_MTIME
)) {
772 if (mask
& XFS_AT_ATIME
) {
773 ip
->i_d
.di_atime
.t_sec
= vap
->va_atime
.tv_sec
;
774 ip
->i_d
.di_atime
.t_nsec
= vap
->va_atime
.tv_nsec
;
775 ip
->i_update_core
= 1;
776 timeflags
&= ~XFS_ICHGTIME_ACC
;
778 if (mask
& XFS_AT_MTIME
) {
779 ip
->i_d
.di_mtime
.t_sec
= vap
->va_mtime
.tv_sec
;
780 ip
->i_d
.di_mtime
.t_nsec
= vap
->va_mtime
.tv_nsec
;
781 timeflags
&= ~XFS_ICHGTIME_MOD
;
782 timeflags
|= XFS_ICHGTIME_CHG
;
784 if (tp
&& (flags
& ATTR_UTIME
))
785 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
789 * Change XFS-added attributes.
791 if (mask
& (XFS_AT_EXTSIZE
|XFS_AT_XFLAGS
)) {
792 if (mask
& XFS_AT_EXTSIZE
) {
794 * Converting bytes to fs blocks.
796 ip
->i_d
.di_extsize
= vap
->va_extsize
>>
797 mp
->m_sb
.sb_blocklog
;
799 if (mask
& XFS_AT_XFLAGS
) {
802 /* can't set PREALLOC this way, just preserve it */
803 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
804 if (vap
->va_xflags
& XFS_XFLAG_IMMUTABLE
)
805 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
806 if (vap
->va_xflags
& XFS_XFLAG_APPEND
)
807 di_flags
|= XFS_DIFLAG_APPEND
;
808 if (vap
->va_xflags
& XFS_XFLAG_SYNC
)
809 di_flags
|= XFS_DIFLAG_SYNC
;
810 if (vap
->va_xflags
& XFS_XFLAG_NOATIME
)
811 di_flags
|= XFS_DIFLAG_NOATIME
;
812 if (vap
->va_xflags
& XFS_XFLAG_NODUMP
)
813 di_flags
|= XFS_DIFLAG_NODUMP
;
814 if (vap
->va_xflags
& XFS_XFLAG_PROJINHERIT
)
815 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
816 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFDIR
) {
817 if (vap
->va_xflags
& XFS_XFLAG_RTINHERIT
)
818 di_flags
|= XFS_DIFLAG_RTINHERIT
;
819 if (vap
->va_xflags
& XFS_XFLAG_NOSYMLINKS
)
820 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
822 if (vap
->va_xflags
& XFS_XFLAG_REALTIME
) {
823 di_flags
|= XFS_DIFLAG_REALTIME
;
824 ip
->i_iocore
.io_flags
|= XFS_IOCORE_RT
;
826 ip
->i_iocore
.io_flags
&= ~XFS_IOCORE_RT
;
829 ip
->i_d
.di_flags
= di_flags
;
831 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
832 timeflags
|= XFS_ICHGTIME_CHG
;
836 * Change file inode change time only if XFS_AT_CTIME set
837 * AND we have been called by a DMI function.
840 if ( (flags
& ATTR_DMI
) && (mask
& XFS_AT_CTIME
) ) {
841 ip
->i_d
.di_ctime
.t_sec
= vap
->va_ctime
.tv_sec
;
842 ip
->i_d
.di_ctime
.t_nsec
= vap
->va_ctime
.tv_nsec
;
843 ip
->i_update_core
= 1;
844 timeflags
&= ~XFS_ICHGTIME_CHG
;
848 * Send out timestamp changes that need to be set to the
849 * current time. Not done when called by a DMI function.
851 if (timeflags
&& !(flags
& ATTR_DMI
))
852 xfs_ichgtime(ip
, timeflags
);
854 XFS_STATS_INC(xs_ig_attrchg
);
857 * If this is a synchronous mount, make sure that the
858 * transaction goes to disk before returning to the user.
859 * This is slightly sub-optimal in that truncates require
860 * two sync transactions instead of one for wsync filesytems.
861 * One for the truncate and one for the timestamps since we
862 * don't want to change the timestamps unless we're sure the
863 * truncate worked. Truncates are less than 1% of the laddis
864 * mix so this probably isn't worth the trouble to optimize.
868 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
869 xfs_trans_set_sync(tp
);
871 code
= xfs_trans_commit(tp
, commit_flags
, NULL
);
875 * If the (regular) file's mandatory locking mode changed, then
876 * notify the vnode. We do this under the inode lock to prevent
877 * racing calls to vop_vnode_change.
879 mandlock_after
= MANDLOCK(vp
, ip
->i_d
.di_mode
);
880 if (mandlock_before
!= mandlock_after
) {
881 VOP_VNODE_CHANGE(vp
, VCHANGE_FLAGS_ENF_LOCKING
,
885 xfs_iunlock(ip
, lock_flags
);
888 * Release any dquot(s) the inode had kept before chown.
890 XFS_QM_DQRELE(mp
, olddquot1
);
891 XFS_QM_DQRELE(mp
, olddquot2
);
892 XFS_QM_DQRELE(mp
, udqp
);
893 XFS_QM_DQRELE(mp
, gdqp
);
899 if (DM_EVENT_ENABLED(vp
->v_vfsp
, ip
, DM_EVENT_ATTRIBUTE
) &&
900 !(flags
& ATTR_DMI
)) {
901 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, vp
, DM_RIGHT_NULL
,
902 NULL
, DM_RIGHT_NULL
, NULL
, NULL
,
903 0, 0, AT_DELAY_FLAG(flags
));
908 commit_flags
|= XFS_TRANS_ABORT
;
911 XFS_QM_DQRELE(mp
, udqp
);
912 XFS_QM_DQRELE(mp
, gdqp
);
914 xfs_trans_cancel(tp
, commit_flags
);
916 if (lock_flags
!= 0) {
917 xfs_iunlock(ip
, lock_flags
);
925 * Null conversion from vnode mode bits to inode mode bits, as in efs.
936 vn_trace_entry(BHV_TO_VNODE(bdp
), __FUNCTION__
,
937 (inst_t
*)__return_address
);
939 ip
= XFS_BHVTOI(bdp
);
940 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
941 error
= xfs_iaccess(ip
, mode
, credp
);
942 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
966 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
972 vp
= BHV_TO_VNODE(bdp
);
973 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
975 ip
= XFS_BHVTOI(bdp
);
978 if (XFS_FORCED_SHUTDOWN(mp
))
979 return XFS_ERROR(EIO
);
981 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
983 ASSERT((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
);
985 offset
= uiop
->uio_offset
;
986 count
= uiop
->uio_resid
;
989 error
= XFS_ERROR(EINVAL
);
997 if (!(ioflags
& IO_INVIS
)) {
998 xfs_ichgtime(ip
, XFS_ICHGTIME_ACC
);
1002 * See if the symlink is stored inline.
1004 pathlen
= (int)ip
->i_d
.di_size
;
1006 if (ip
->i_df
.if_flags
& XFS_IFINLINE
) {
1007 error
= uio_read(ip
->i_df
.if_u1
.if_data
, pathlen
, uiop
);
1011 * Symlink not inline. Call bmap to get it in.
1013 nmaps
= SYMLINK_MAPS
;
1015 error
= xfs_bmapi(NULL
, ip
, 0, XFS_B_TO_FSB(mp
, pathlen
),
1016 0, NULL
, 0, mval
, &nmaps
, NULL
);
1022 for (n
= 0; n
< nmaps
; n
++) {
1023 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
1024 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
1025 bp
= xfs_buf_read(mp
->m_ddev_targp
, d
,
1026 BTOBB(byte_cnt
), 0);
1027 error
= XFS_BUF_GETERROR(bp
);
1029 xfs_ioerror_alert("xfs_readlink",
1030 ip
->i_mount
, bp
, XFS_BUF_ADDR(bp
));
1034 if (pathlen
< byte_cnt
)
1036 pathlen
-= byte_cnt
;
1038 error
= uio_read(XFS_BUF_PTR(bp
), byte_cnt
, uiop
);
1047 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1056 * This is called to sync the inode and its data out to disk.
1057 * We need to hold the I/O lock while flushing the data, and
1058 * the inode lock while flushing the inode. The inode lock CANNOT
1059 * be held while flushing the data, so acquire after we're done
1073 int log_flushed
= 0, changed
= 1;
1075 vn_trace_entry(BHV_TO_VNODE(bdp
),
1076 __FUNCTION__
, (inst_t
*)__return_address
);
1078 ip
= XFS_BHVTOI(bdp
);
1080 ASSERT(start
>= 0 && stop
>= -1);
1082 if (XFS_FORCED_SHUTDOWN(ip
->i_mount
))
1083 return XFS_ERROR(EIO
);
1086 * We always need to make sure that the required inode state
1087 * is safe on disk. The vnode might be clean but because
1088 * of committed transactions that haven't hit the disk yet.
1089 * Likewise, there could be unflushed non-transactional
1090 * changes to the inode core that have to go to disk.
1092 * The following code depends on one assumption: that
1093 * any transaction that changes an inode logs the core
1094 * because it has to change some field in the inode core
1095 * (typically nextents or nblocks). That assumption
1096 * implies that any transactions against an inode will
1097 * catch any non-transactional updates. If inode-altering
1098 * transactions exist that violate this assumption, the
1099 * code breaks. Right now, it figures that if the involved
1100 * update_* field is clear and the inode is unpinned, the
1101 * inode is clean. Either it's been flushed or it's been
1102 * committed and the commit has hit the disk unpinning the inode.
1103 * (Note that xfs_inode_item_format() called at commit clears
1104 * the update_* fields.)
1106 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1108 /* If we are flushing data then we care about update_size
1109 * being set, otherwise we care about update_core
1111 if ((flag
& FSYNC_DATA
) ?
1112 (ip
->i_update_size
== 0) :
1113 (ip
->i_update_core
== 0)) {
1115 * Timestamps/size haven't changed since last inode
1116 * flush or inode transaction commit. That means
1117 * either nothing got written or a transaction
1118 * committed which caught the updates. If the
1119 * latter happened and the transaction hasn't
1120 * hit the disk yet, the inode will be still
1121 * be pinned. If it is, force the log.
1124 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1126 if (xfs_ipincount(ip
)) {
1127 _xfs_log_force(ip
->i_mount
, (xfs_lsn_t
)0,
1129 ((flag
& FSYNC_WAIT
)
1130 ? XFS_LOG_SYNC
: 0),
1134 * If the inode is not pinned and nothing
1135 * has changed we don't need to flush the
1143 * Kick off a transaction to log the inode
1144 * core to get the updates. Make it
1145 * sync if FSYNC_WAIT is passed in (which
1146 * is done by everybody but specfs). The
1147 * sync transaction will also force the log.
1149 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1150 tp
= xfs_trans_alloc(ip
->i_mount
, XFS_TRANS_FSYNC_TS
);
1151 if ((error
= xfs_trans_reserve(tp
, 0,
1152 XFS_FSYNC_TS_LOG_RES(ip
->i_mount
),
1154 xfs_trans_cancel(tp
, 0);
1157 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1160 * Note - it's possible that we might have pushed
1161 * ourselves out of the way during trans_reserve
1162 * which would flush the inode. But there's no
1163 * guarantee that the inode buffer has actually
1164 * gone out yet (it's delwri). Plus the buffer
1165 * could be pinned anyway if it's part of an
1166 * inode in another recent transaction. So we
1167 * play it safe and fire off the transaction anyway.
1169 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
1170 xfs_trans_ihold(tp
, ip
);
1171 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1172 if (flag
& FSYNC_WAIT
)
1173 xfs_trans_set_sync(tp
);
1174 error
= _xfs_trans_commit(tp
, 0, NULL
, &log_flushed
);
1176 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1179 if ((ip
->i_mount
->m_flags
& XFS_MOUNT_BARRIER
) && changed
) {
1181 * If the log write didn't issue an ordered tag we need
1182 * to flush the disk cache for the data device now.
1185 xfs_blkdev_issue_flush(ip
->i_mount
->m_ddev_targp
);
1188 * If this inode is on the RT dev we need to flush that
1191 if (ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
)
1192 xfs_blkdev_issue_flush(ip
->i_mount
->m_rtdev_targp
);
1199 * This is called by xfs_inactive to free any blocks beyond eof,
1200 * when the link count isn't zero.
1203 xfs_inactive_free_eofblocks(
1209 xfs_fileoff_t end_fsb
;
1210 xfs_fileoff_t last_fsb
;
1211 xfs_filblks_t map_len
;
1213 xfs_bmbt_irec_t imap
;
1216 * Figure out if there are any blocks beyond the end
1217 * of the file. If not, then there is nothing to do.
1219 end_fsb
= XFS_B_TO_FSB(mp
, ((xfs_ufsize_t
)ip
->i_d
.di_size
));
1220 last_fsb
= XFS_B_TO_FSB(mp
, (xfs_ufsize_t
)XFS_MAXIOFFSET(mp
));
1221 map_len
= last_fsb
- end_fsb
;
1226 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1227 error
= xfs_bmapi(NULL
, ip
, end_fsb
, map_len
, 0,
1228 NULL
, 0, &imap
, &nimaps
, NULL
);
1229 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1231 if (!error
&& (nimaps
!= 0) &&
1232 (imap
.br_startblock
!= HOLESTARTBLOCK
)) {
1234 * Attach the dquots to the inode up front.
1236 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
1240 * There are blocks after the end of file.
1241 * Free them up now by truncating the file to
1244 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1247 * Do the xfs_itruncate_start() call before
1248 * reserving any log space because
1249 * itruncate_start will call into the buffer
1250 * cache and we can't
1251 * do that within a transaction.
1253 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
1254 xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
,
1257 error
= xfs_trans_reserve(tp
, 0,
1258 XFS_ITRUNCATE_LOG_RES(mp
),
1259 0, XFS_TRANS_PERM_LOG_RES
,
1260 XFS_ITRUNCATE_LOG_COUNT
);
1262 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1263 xfs_trans_cancel(tp
, 0);
1264 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1268 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1269 xfs_trans_ijoin(tp
, ip
,
1272 xfs_trans_ihold(tp
, ip
);
1274 error
= xfs_itruncate_finish(&tp
, ip
,
1279 * If we get an error at this point we
1280 * simply don't bother truncating the file.
1283 xfs_trans_cancel(tp
,
1284 (XFS_TRANS_RELEASE_LOG_RES
|
1287 error
= xfs_trans_commit(tp
,
1288 XFS_TRANS_RELEASE_LOG_RES
,
1291 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1297 * Free a symlink that has blocks associated with it.
1300 xfs_inactive_symlink_rmt(
1308 xfs_fsblock_t first_block
;
1309 xfs_bmap_free_t free_list
;
1312 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
1320 ASSERT(ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
));
1322 * We're freeing a symlink that has some
1323 * blocks allocated to it. Free the
1324 * blocks here. We know that we've got
1325 * either 1 or 2 extents and that we can
1326 * free them all in one bunmapi call.
1328 ASSERT(ip
->i_d
.di_nextents
> 0 && ip
->i_d
.di_nextents
<= 2);
1329 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
1330 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
1331 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1332 xfs_trans_cancel(tp
, 0);
1337 * Lock the inode, fix the size, and join it to the transaction.
1338 * Hold it so in the normal path, we still have it locked for
1339 * the second transaction. In the error paths we need it
1340 * held so the cancel won't rele it, see below.
1342 xfs_ilock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1343 size
= (int)ip
->i_d
.di_size
;
1344 ip
->i_d
.di_size
= 0;
1345 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1346 xfs_trans_ihold(tp
, ip
);
1347 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1349 * Find the block(s) so we can inval and unmap them.
1352 XFS_BMAP_INIT(&free_list
, &first_block
);
1353 nmaps
= sizeof(mval
) / sizeof(mval
[0]);
1354 if ((error
= xfs_bmapi(tp
, ip
, 0, XFS_B_TO_FSB(mp
, size
),
1355 XFS_BMAPI_METADATA
, &first_block
, 0, mval
, &nmaps
,
1359 * Invalidate the block(s).
1361 for (i
= 0; i
< nmaps
; i
++) {
1362 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
,
1363 XFS_FSB_TO_DADDR(mp
, mval
[i
].br_startblock
),
1364 XFS_FSB_TO_BB(mp
, mval
[i
].br_blockcount
), 0);
1365 xfs_trans_binval(tp
, bp
);
1368 * Unmap the dead block(s) to the free_list.
1370 if ((error
= xfs_bunmapi(tp
, ip
, 0, size
, XFS_BMAPI_METADATA
, nmaps
,
1371 &first_block
, &free_list
, &done
)))
1375 * Commit the first transaction. This logs the EFI and the inode.
1377 if ((error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
)))
1380 * The transaction must have been committed, since there were
1381 * actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
1382 * The new tp has the extent freeing and EFDs.
1386 * The first xact was committed, so add the inode to the new one.
1387 * Mark it dirty so it will be logged and moved forward in the log as
1388 * part of every commit.
1390 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1391 xfs_trans_ihold(tp
, ip
);
1392 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1394 * Get a new, empty transaction to return to our caller.
1396 ntp
= xfs_trans_dup(tp
);
1398 * Commit the transaction containing extent freeing and EFD's.
1399 * If we get an error on the commit here or on the reserve below,
1400 * we need to unlock the inode since the new transaction doesn't
1401 * have the inode attached.
1403 error
= xfs_trans_commit(tp
, 0, NULL
);
1406 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1410 * Remove the memory for extent descriptions (just bookkeeping).
1412 if (ip
->i_df
.if_bytes
)
1413 xfs_idata_realloc(ip
, -ip
->i_df
.if_bytes
, XFS_DATA_FORK
);
1414 ASSERT(ip
->i_df
.if_bytes
== 0);
1416 * Put an itruncate log reservation in the new transaction
1419 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
1420 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
1421 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1425 * Return with the inode locked but not joined to the transaction.
1431 xfs_bmap_cancel(&free_list
);
1434 * Have to come here with the inode locked and either
1435 * (held and in the transaction) or (not in the transaction).
1436 * If the inode isn't held then cancel would iput it, but
1437 * that's wrong since this is inactive and the vnode ref
1438 * count is 0 already.
1439 * Cancel won't do anything to the inode if held, but it still
1440 * needs to be locked until the cancel is done, if it was
1441 * joined to the transaction.
1443 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1444 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1451 xfs_inactive_symlink_local(
1457 ASSERT(ip
->i_d
.di_size
<= XFS_IFORK_DSIZE(ip
));
1459 * We're freeing a symlink which fit into
1460 * the inode. Just free the memory used
1461 * to hold the old symlink.
1463 error
= xfs_trans_reserve(*tpp
, 0,
1464 XFS_ITRUNCATE_LOG_RES(ip
->i_mount
),
1465 0, XFS_TRANS_PERM_LOG_RES
,
1466 XFS_ITRUNCATE_LOG_COUNT
);
1469 xfs_trans_cancel(*tpp
, 0);
1473 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1476 * Zero length symlinks _can_ exist.
1478 if (ip
->i_df
.if_bytes
> 0) {
1479 xfs_idata_realloc(ip
,
1480 -(ip
->i_df
.if_bytes
),
1482 ASSERT(ip
->i_df
.if_bytes
== 0);
1499 ASSERT(ismrlocked(&ip
->i_iolock
, MR_UPDATE
));
1502 ASSERT(ip
->i_d
.di_forkoff
!= 0);
1503 xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
1504 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1506 error
= xfs_attr_inactive(ip
);
1509 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1510 return (error
); /* goto out*/
1513 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1514 error
= xfs_trans_reserve(tp
, 0,
1515 XFS_IFREE_LOG_RES(mp
),
1516 0, XFS_TRANS_PERM_LOG_RES
,
1517 XFS_INACTIVE_LOG_COUNT
);
1519 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1520 xfs_trans_cancel(tp
, 0);
1522 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1526 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1527 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1528 xfs_trans_ihold(tp
, ip
);
1529 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1531 ASSERT(ip
->i_d
.di_anextents
== 0);
1546 vp
= BHV_TO_VNODE(bdp
);
1547 ip
= XFS_BHVTOI(bdp
);
1549 if (!VN_ISREG(vp
) || (ip
->i_d
.di_mode
== 0)) {
1553 /* If this is a read-only mount, don't do this (would generate I/O) */
1554 if (vp
->v_vfsp
->vfs_flag
& VFS_RDONLY
)
1557 #ifdef HAVE_REFCACHE
1558 /* If we are in the NFS reference cache then don't do this now */
1565 if (ip
->i_d
.di_nlink
!= 0) {
1566 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1567 ((ip
->i_d
.di_size
> 0) || (VN_CACHED(vp
) > 0)) &&
1568 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)) &&
1569 (!(ip
->i_d
.di_flags
& (XFS_DIFLAG_PREALLOC
|XFS_DIFLAG_APPEND
)))) {
1570 if ((error
= xfs_inactive_free_eofblocks(mp
, ip
)))
1572 /* Update linux inode block count after free above */
1573 LINVFS_GET_IP(vp
)->i_blocks
= XFS_FSB_TO_BB(mp
,
1574 ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
1584 * This is called when the vnode reference count for the vnode
1585 * goes to zero. If the file has been unlinked, then it must
1586 * now be truncated. Also, we clear all of the read-ahead state
1587 * kept for the inode here since the file is now closed.
1596 xfs_bmap_free_t free_list
;
1597 xfs_fsblock_t first_block
;
1604 vp
= BHV_TO_VNODE(bdp
);
1605 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1607 ip
= XFS_BHVTOI(bdp
);
1610 * If the inode is already free, then there can be nothing
1613 if (ip
->i_d
.di_mode
== 0 || VN_BAD(vp
)) {
1614 ASSERT(ip
->i_df
.if_real_bytes
== 0);
1615 ASSERT(ip
->i_df
.if_broot_bytes
== 0);
1616 return VN_INACTIVE_CACHE
;
1620 * Only do a truncate if it's a regular file with
1621 * some actual space in it. It's OK to look at the
1622 * inode's fields without the lock because we're the
1623 * only one with a reference to the inode.
1625 truncate
= ((ip
->i_d
.di_nlink
== 0) &&
1626 ((ip
->i_d
.di_size
!= 0) || (ip
->i_d
.di_nextents
> 0)) &&
1627 ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
));
1631 if (ip
->i_d
.di_nlink
== 0 &&
1632 DM_EVENT_ENABLED(vp
->v_vfsp
, ip
, DM_EVENT_DESTROY
)) {
1633 (void) XFS_SEND_DESTROY(mp
, vp
, DM_RIGHT_NULL
);
1638 /* If this is a read-only mount, don't do this (would generate I/O) */
1639 if (vp
->v_vfsp
->vfs_flag
& VFS_RDONLY
)
1642 if (ip
->i_d
.di_nlink
!= 0) {
1643 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1644 ((ip
->i_d
.di_size
> 0) || (VN_CACHED(vp
) > 0)) &&
1645 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)) &&
1646 (!(ip
->i_d
.di_flags
& (XFS_DIFLAG_PREALLOC
|XFS_DIFLAG_APPEND
)) ||
1647 (ip
->i_delayed_blks
!= 0))) {
1648 if ((error
= xfs_inactive_free_eofblocks(mp
, ip
)))
1649 return (VN_INACTIVE_CACHE
);
1650 /* Update linux inode block count after free above */
1651 LINVFS_GET_IP(vp
)->i_blocks
= XFS_FSB_TO_BB(mp
,
1652 ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
1657 ASSERT(ip
->i_d
.di_nlink
== 0);
1659 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
1660 return (VN_INACTIVE_CACHE
);
1662 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1665 * Do the xfs_itruncate_start() call before
1666 * reserving any log space because itruncate_start
1667 * will call into the buffer cache and we can't
1668 * do that within a transaction.
1670 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
1672 xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
, 0);
1674 error
= xfs_trans_reserve(tp
, 0,
1675 XFS_ITRUNCATE_LOG_RES(mp
),
1676 0, XFS_TRANS_PERM_LOG_RES
,
1677 XFS_ITRUNCATE_LOG_COUNT
);
1679 /* Don't call itruncate_cleanup */
1680 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1681 xfs_trans_cancel(tp
, 0);
1682 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1683 return (VN_INACTIVE_CACHE
);
1686 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1687 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1688 xfs_trans_ihold(tp
, ip
);
1691 * normally, we have to run xfs_itruncate_finish sync.
1692 * But if filesystem is wsync and we're in the inactive
1693 * path, then we know that nlink == 0, and that the
1694 * xaction that made nlink == 0 is permanently committed
1695 * since xfs_remove runs as a synchronous transaction.
1697 error
= xfs_itruncate_finish(&tp
, ip
, 0, XFS_DATA_FORK
,
1698 (!(mp
->m_flags
& XFS_MOUNT_WSYNC
) ? 1 : 0));
1701 xfs_trans_cancel(tp
,
1702 XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1703 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1704 return (VN_INACTIVE_CACHE
);
1706 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
) {
1709 * If we get an error while cleaning up a
1710 * symlink we bail out.
1712 error
= (ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
)) ?
1713 xfs_inactive_symlink_rmt(ip
, &tp
) :
1714 xfs_inactive_symlink_local(ip
, &tp
);
1718 return (VN_INACTIVE_CACHE
);
1721 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1722 xfs_trans_ihold(tp
, ip
);
1724 error
= xfs_trans_reserve(tp
, 0,
1725 XFS_IFREE_LOG_RES(mp
),
1726 0, XFS_TRANS_PERM_LOG_RES
,
1727 XFS_INACTIVE_LOG_COUNT
);
1729 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1730 xfs_trans_cancel(tp
, 0);
1731 return (VN_INACTIVE_CACHE
);
1734 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1735 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1736 xfs_trans_ihold(tp
, ip
);
1740 * If there are attributes associated with the file
1741 * then blow them away now. The code calls a routine
1742 * that recursively deconstructs the attribute fork.
1743 * We need to just commit the current transaction
1744 * because we can't use it for xfs_attr_inactive().
1746 if (ip
->i_d
.di_anextents
> 0) {
1747 error
= xfs_inactive_attrs(ip
, &tp
);
1749 * If we got an error, the transaction is already
1750 * cancelled, and the inode is unlocked. Just get out.
1753 return (VN_INACTIVE_CACHE
);
1754 } else if (ip
->i_afp
) {
1755 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1761 XFS_BMAP_INIT(&free_list
, &first_block
);
1762 error
= xfs_ifree(tp
, ip
, &free_list
);
1765 * If we fail to free the inode, shut down. The cancel
1766 * might do that, we need to make sure. Otherwise the
1767 * inode might be lost for a long time or forever.
1769 if (!XFS_FORCED_SHUTDOWN(mp
)) {
1771 "xfs_inactive: xfs_ifree() returned an error = %d on %s",
1772 error
, mp
->m_fsname
);
1773 xfs_force_shutdown(mp
, XFS_METADATA_IO_ERROR
);
1775 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
|XFS_TRANS_ABORT
);
1778 * Credit the quota account(s). The inode is gone.
1780 XFS_TRANS_MOD_DQUOT_BYINO(mp
, tp
, ip
, XFS_TRANS_DQ_ICOUNT
, -1);
1783 * Just ignore errors at this point. There is
1784 * nothing we can do except to try to keep going.
1786 (void) xfs_bmap_finish(&tp
, &free_list
, first_block
,
1788 (void) xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
1791 * Release the dquots held by inode, if any.
1793 XFS_QM_DQDETACH(mp
, ip
);
1795 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1798 return VN_INACTIVE_CACHE
;
1807 bhv_desc_t
*dir_bdp
,
1814 xfs_inode_t
*dp
, *ip
;
1820 dir_vp
= BHV_TO_VNODE(dir_bdp
);
1821 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1823 dp
= XFS_BHVTOI(dir_bdp
);
1825 if (XFS_FORCED_SHUTDOWN(dp
->i_mount
))
1826 return XFS_ERROR(EIO
);
1828 lock_mode
= xfs_ilock_map_shared(dp
);
1829 error
= xfs_dir_lookup_int(dir_bdp
, lock_mode
, dentry
, &e_inum
, &ip
);
1831 *vpp
= XFS_ITOV(ip
);
1834 xfs_iunlock_map_shared(dp
, lock_mode
);
1840 * xfs_create (create a new file).
1844 bhv_desc_t
*dir_bdp
,
1850 char *name
= VNAME(dentry
);
1852 xfs_inode_t
*dp
, *ip
;
1858 xfs_bmap_free_t free_list
;
1859 xfs_fsblock_t first_block
;
1860 boolean_t dp_joined_to_trans
;
1861 int dm_event_sent
= 0;
1865 struct xfs_dquot
*udqp
, *gdqp
;
1871 dir_vp
= BHV_TO_VNODE(dir_bdp
);
1872 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1874 dp
= XFS_BHVTOI(dir_bdp
);
1877 dm_di_mode
= vap
->va_mode
;
1878 namelen
= VNAMELEN(dentry
);
1880 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_CREATE
)) {
1881 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
1882 dir_vp
, DM_RIGHT_NULL
, NULL
,
1883 DM_RIGHT_NULL
, name
, NULL
,
1891 if (XFS_FORCED_SHUTDOWN(mp
))
1892 return XFS_ERROR(EIO
);
1894 /* Return through std_return after this point. */
1897 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
1898 prid
= dp
->i_d
.di_projid
;
1899 else if (vap
->va_mask
& XFS_AT_PROJID
)
1900 prid
= (xfs_prid_t
)vap
->va_projid
;
1902 prid
= (xfs_prid_t
)dfltprid
;
1905 * Make sure that we have allocated dquot(s) on disk.
1907 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
1908 current_fsuid(credp
), current_fsgid(credp
), prid
,
1909 XFS_QMOPT_QUOTALL
|XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
1914 dp_joined_to_trans
= B_FALSE
;
1916 tp
= xfs_trans_alloc(mp
, XFS_TRANS_CREATE
);
1917 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
1918 resblks
= XFS_CREATE_SPACE_RES(mp
, namelen
);
1920 * Initially assume that the file does not exist and
1921 * reserve the resources for that case. If that is not
1922 * the case we'll drop the one we have and get a more
1923 * appropriate transaction later.
1925 error
= xfs_trans_reserve(tp
, resblks
, XFS_CREATE_LOG_RES(mp
), 0,
1926 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1927 if (error
== ENOSPC
) {
1929 error
= xfs_trans_reserve(tp
, 0, XFS_CREATE_LOG_RES(mp
), 0,
1930 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1938 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
1940 XFS_BMAP_INIT(&free_list
, &first_block
);
1945 * Reserve disk quota and the inode.
1947 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
1952 (error
= XFS_DIR_CANENTER(mp
, tp
, dp
, name
, namelen
)))
1954 rdev
= (vap
->va_mask
& XFS_AT_RDEV
) ? vap
->va_rdev
: 0;
1955 error
= xfs_dir_ialloc(&tp
, dp
, vap
->va_mode
, 1,
1956 rdev
, credp
, prid
, resblks
> 0,
1959 if (error
== ENOSPC
)
1966 * At this point, we've gotten a newly allocated inode.
1967 * It is locked (and joined to the transaction).
1970 ASSERT(ismrlocked (&ip
->i_lock
, MR_UPDATE
));
1973 * Now we join the directory inode to the transaction.
1974 * We do not do it earlier because xfs_dir_ialloc
1975 * might commit the previous transaction (and release
1980 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
1981 dp_joined_to_trans
= B_TRUE
;
1983 error
= XFS_DIR_CREATENAME(mp
, tp
, dp
, name
, namelen
, ip
->i_ino
,
1984 &first_block
, &free_list
,
1985 resblks
? resblks
- XFS_IALLOC_SPACE_RES(mp
) : 0);
1987 ASSERT(error
!= ENOSPC
);
1990 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
1991 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
1994 * If this is a synchronous mount, make sure that the
1995 * create transaction goes to disk before returning to
1998 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
1999 xfs_trans_set_sync(tp
);
2005 * Attach the dquot(s) to the inodes and modify them incore.
2006 * These ids of the inode couldn't have changed since the new
2007 * inode has been locked ever since it was created.
2009 XFS_QM_DQVOPCREATE(mp
, tp
, ip
, udqp
, gdqp
);
2012 * xfs_trans_commit normally decrements the vnode ref count
2013 * when it unlocks the inode. Since we want to return the
2014 * vnode to the caller, we bump the vnode ref count now.
2019 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
2021 xfs_bmap_cancel(&free_list
);
2025 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2032 XFS_QM_DQRELE(mp
, udqp
);
2033 XFS_QM_DQRELE(mp
, gdqp
);
2036 * Propogate the fact that the vnode changed after the
2037 * xfs_inode locks have been released.
2039 VOP_VNODE_CHANGE(vp
, VCHANGE_FLAGS_TRUNCATED
, 3);
2043 /* Fallthrough to std_return with error = 0 */
2046 if ( (*vpp
|| (error
!= 0 && dm_event_sent
!= 0)) &&
2047 DM_EVENT_ENABLED(dir_vp
->v_vfsp
, XFS_BHVTOI(dir_bdp
),
2048 DM_EVENT_POSTCREATE
)) {
2049 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTCREATE
,
2050 dir_vp
, DM_RIGHT_NULL
,
2052 DM_RIGHT_NULL
, name
, NULL
,
2053 dm_di_mode
, error
, 0);
2058 cancel_flags
|= XFS_TRANS_ABORT
;
2063 xfs_trans_cancel(tp
, cancel_flags
);
2065 if (!dp_joined_to_trans
&& (dp
!= NULL
))
2066 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2067 XFS_QM_DQRELE(mp
, udqp
);
2068 XFS_QM_DQRELE(mp
, gdqp
);
2074 * Wait until after the current transaction is aborted to
2075 * release the inode. This prevents recursive transactions
2076 * and deadlocks from xfs_inactive.
2078 cancel_flags
|= XFS_TRANS_ABORT
;
2079 xfs_trans_cancel(tp
, cancel_flags
);
2082 XFS_QM_DQRELE(mp
, udqp
);
2083 XFS_QM_DQRELE(mp
, gdqp
);
2090 * Some counters to see if (and how often) we are hitting some deadlock
2091 * prevention code paths.
2095 int xfs_rm_lock_delays
;
2096 int xfs_rm_attempts
;
2100 * The following routine will lock the inodes associated with the
2101 * directory and the named entry in the directory. The locks are
2102 * acquired in increasing inode number.
2104 * If the entry is "..", then only the directory is locked. The
2105 * vnode ref count will still include that from the .. entry in
2108 * There is a deadlock we need to worry about. If the locked directory is
2109 * in the AIL, it might be blocking up the log. The next inode we lock
2110 * could be already locked by another thread waiting for log space (e.g
2111 * a permanent log reservation with a long running transaction (see
2112 * xfs_itruncate_finish)). To solve this, we must check if the directory
2113 * is in the ail and use lock_nowait. If we can't lock, we need to
2114 * drop the inode lock on the directory and try again. xfs_iunlock will
2115 * potentially push the tail if we were holding up the log.
2118 xfs_lock_dir_and_entry(
2121 xfs_inode_t
*ip
) /* inode of entry 'name' */
2125 xfs_inode_t
*ips
[2];
2134 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
2141 * We want to lock in increasing inum. Since we've already
2142 * acquired the lock on the directory, we may need to release
2143 * if if the inum of the entry turns out to be less.
2145 if (e_inum
> dp
->i_ino
) {
2147 * We are already in the right order, so just
2148 * lock on the inode of the entry.
2149 * We need to use nowait if dp is in the AIL.
2152 lp
= (xfs_log_item_t
*)dp
->i_itemp
;
2153 if (lp
&& (lp
->li_flags
& XFS_LI_IN_AIL
)) {
2154 if (!xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
)) {
2161 * Unlock dp and try again.
2162 * xfs_iunlock will try to push the tail
2163 * if the inode is in the AIL.
2166 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2168 if ((attempts
% 5) == 0) {
2169 delay(1); /* Don't just spin the CPU */
2171 xfs_rm_lock_delays
++;
2177 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
2179 } else if (e_inum
< dp
->i_ino
) {
2180 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2184 xfs_lock_inodes(ips
, 2, 0, XFS_ILOCK_EXCL
);
2186 /* else e_inum == dp->i_ino */
2187 /* This can happen if we're asked to lock /x/..
2188 * the entry is "..", which is also the parent directory.
2196 int xfs_small_retries
;
2197 int xfs_middle_retries
;
2198 int xfs_lots_retries
;
2199 int xfs_lock_delays
;
2203 * The following routine will lock n inodes in exclusive mode.
2204 * We assume the caller calls us with the inodes in i_ino order.
2206 * We need to detect deadlock where an inode that we lock
2207 * is in the AIL and we start waiting for another inode that is locked
2208 * by a thread in a long running transaction (such as truncate). This can
2209 * result in deadlock since the long running trans might need to wait
2210 * for the inode we just locked in order to push the tail and free space
2220 int attempts
= 0, i
, j
, try_lock
;
2223 ASSERT(ips
&& (inodes
>= 2)); /* we need at least two */
2234 for (; i
< inodes
; i
++) {
2237 if (i
&& (ips
[i
] == ips
[i
-1])) /* Already locked */
2241 * If try_lock is not set yet, make sure all locked inodes
2242 * are not in the AIL.
2243 * If any are, set try_lock to be used later.
2247 for (j
= (i
- 1); j
>= 0 && !try_lock
; j
--) {
2248 lp
= (xfs_log_item_t
*)ips
[j
]->i_itemp
;
2249 if (lp
&& (lp
->li_flags
& XFS_LI_IN_AIL
)) {
2256 * If any of the previous locks we have locked is in the AIL,
2257 * we must TRY to get the second and subsequent locks. If
2258 * we can't get any, we must release all we have
2263 /* try_lock must be 0 if i is 0. */
2265 * try_lock means we have an inode locked
2266 * that is in the AIL.
2269 if (!xfs_ilock_nowait(ips
[i
], lock_mode
)) {
2273 * Unlock all previous guys and try again.
2274 * xfs_iunlock will try to push the tail
2275 * if the inode is in the AIL.
2278 for(j
= i
- 1; j
>= 0; j
--) {
2281 * Check to see if we've already
2282 * unlocked this one.
2283 * Not the first one going back,
2284 * and the inode ptr is the same.
2286 if ((j
!= (i
- 1)) && ips
[j
] ==
2290 xfs_iunlock(ips
[j
], lock_mode
);
2293 if ((attempts
% 5) == 0) {
2294 delay(1); /* Don't just spin the CPU */
2304 xfs_ilock(ips
[i
], lock_mode
);
2310 if (attempts
< 5) xfs_small_retries
++;
2311 else if (attempts
< 100) xfs_middle_retries
++;
2312 else xfs_lots_retries
++;
2320 #define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);}
2321 int remove_which_error_return
= 0;
2323 #define REMOVE_DEBUG_TRACE(x)
2324 #endif /* ! DEBUG */
2333 bhv_desc_t
*dir_bdp
,
2338 char *name
= VNAME(dentry
);
2339 xfs_inode_t
*dp
, *ip
;
2340 xfs_trans_t
*tp
= NULL
;
2343 xfs_bmap_free_t free_list
;
2344 xfs_fsblock_t first_block
;
2352 dir_vp
= BHV_TO_VNODE(dir_bdp
);
2353 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
2355 dp
= XFS_BHVTOI(dir_bdp
);
2358 if (XFS_FORCED_SHUTDOWN(mp
))
2359 return XFS_ERROR(EIO
);
2361 namelen
= VNAMELEN(dentry
);
2363 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_REMOVE
)) {
2364 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_REMOVE
, dir_vp
,
2365 DM_RIGHT_NULL
, NULL
, DM_RIGHT_NULL
,
2366 name
, NULL
, 0, 0, 0);
2371 /* From this point on, return through std_return */
2375 * We need to get a reference to ip before we get our log
2376 * reservation. The reason for this is that we cannot call
2377 * xfs_iget for an inode for which we do not have a reference
2378 * once we've acquired a log reservation. This is because the
2379 * inode we are trying to get might be in xfs_inactive going
2380 * for a log reservation. Since we'll have to wait for the
2381 * inactive code to complete before returning from xfs_iget,
2382 * we need to make sure that we don't have log space reserved
2383 * when we call xfs_iget. Instead we get an unlocked referece
2384 * to the inode before getting our log reservation.
2386 error
= xfs_get_dir_entry(dentry
, &ip
);
2388 REMOVE_DEBUG_TRACE(__LINE__
);
2392 dm_di_mode
= ip
->i_d
.di_mode
;
2394 vn_trace_entry(XFS_ITOV(ip
), __FUNCTION__
, (inst_t
*)__return_address
);
2398 error
= XFS_QM_DQATTACH(mp
, dp
, 0);
2399 if (!error
&& dp
!= ip
)
2400 error
= XFS_QM_DQATTACH(mp
, ip
, 0);
2402 REMOVE_DEBUG_TRACE(__LINE__
);
2407 tp
= xfs_trans_alloc(mp
, XFS_TRANS_REMOVE
);
2408 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2410 * We try to get the real space reservation first,
2411 * allowing for directory btree deletion(s) implying
2412 * possible bmap insert(s). If we can't get the space
2413 * reservation then we use 0 instead, and avoid the bmap
2414 * btree insert(s) in the directory code by, if the bmap
2415 * insert tries to happen, instead trimming the LAST
2416 * block from the directory.
2418 resblks
= XFS_REMOVE_SPACE_RES(mp
);
2419 error
= xfs_trans_reserve(tp
, resblks
, XFS_REMOVE_LOG_RES(mp
), 0,
2420 XFS_TRANS_PERM_LOG_RES
, XFS_REMOVE_LOG_COUNT
);
2421 if (error
== ENOSPC
) {
2423 error
= xfs_trans_reserve(tp
, 0, XFS_REMOVE_LOG_RES(mp
), 0,
2424 XFS_TRANS_PERM_LOG_RES
, XFS_REMOVE_LOG_COUNT
);
2427 ASSERT(error
!= ENOSPC
);
2428 REMOVE_DEBUG_TRACE(__LINE__
);
2429 xfs_trans_cancel(tp
, 0);
2434 error
= xfs_lock_dir_and_entry(dp
, dentry
, ip
);
2436 REMOVE_DEBUG_TRACE(__LINE__
);
2437 xfs_trans_cancel(tp
, cancel_flags
);
2443 * At this point, we've gotten both the directory and the entry
2446 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2449 * Increment vnode ref count only in this case since
2450 * there's an extra vnode reference in the case where
2454 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
2458 * Entry must exist since we did a lookup in xfs_lock_dir_and_entry.
2460 XFS_BMAP_INIT(&free_list
, &first_block
);
2461 error
= XFS_DIR_REMOVENAME(mp
, tp
, dp
, name
, namelen
, ip
->i_ino
,
2462 &first_block
, &free_list
, 0);
2464 ASSERT(error
!= ENOENT
);
2465 REMOVE_DEBUG_TRACE(__LINE__
);
2468 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2471 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
2473 error
= xfs_droplink(tp
, ip
);
2475 REMOVE_DEBUG_TRACE(__LINE__
);
2479 /* Determine if this is the last link while
2480 * we are in the transaction.
2482 link_zero
= (ip
)->i_d
.di_nlink
==0;
2485 * Take an extra ref on the inode so that it doesn't
2486 * go to xfs_inactive() from within the commit.
2491 * If this is a synchronous mount, make sure that the
2492 * remove transaction goes to disk before returning to
2495 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2496 xfs_trans_set_sync(tp
);
2499 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
2501 REMOVE_DEBUG_TRACE(__LINE__
);
2505 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2512 * Before we drop our extra reference to the inode, purge it
2513 * from the refcache if it is there. By waiting until afterwards
2514 * to do the IRELE, we ensure that we won't go inactive in the
2515 * xfs_refcache_purge_ip routine (although that would be OK).
2517 xfs_refcache_purge_ip(ip
);
2519 vn_trace_exit(XFS_ITOV(ip
), __FUNCTION__
, (inst_t
*)__return_address
);
2522 * Let interposed file systems know about removed links.
2524 VOP_LINK_REMOVED(XFS_ITOV(ip
), dir_vp
, link_zero
);
2528 /* Fall through to std_return with error = 0 */
2530 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
,
2531 DM_EVENT_POSTREMOVE
)) {
2532 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTREMOVE
,
2533 dir_vp
, DM_RIGHT_NULL
,
2534 NULL
, DM_RIGHT_NULL
,
2535 name
, NULL
, dm_di_mode
, error
, 0);
2540 xfs_bmap_cancel(&free_list
);
2541 cancel_flags
|= XFS_TRANS_ABORT
;
2542 xfs_trans_cancel(tp
, cancel_flags
);
2547 * In this case make sure to not release the inode until after
2548 * the current transaction is aborted. Releasing it beforehand
2549 * can cause us to go to xfs_inactive and start a recursive
2550 * transaction which can easily deadlock with the current one.
2552 xfs_bmap_cancel(&free_list
);
2553 cancel_flags
|= XFS_TRANS_ABORT
;
2554 xfs_trans_cancel(tp
, cancel_flags
);
2557 * Before we drop our extra reference to the inode, purge it
2558 * from the refcache if it is there. By waiting until afterwards
2559 * to do the IRELE, we ensure that we won't go inactive in the
2560 * xfs_refcache_purge_ip routine (although that would be OK).
2562 xfs_refcache_purge_ip(ip
);
2576 bhv_desc_t
*target_dir_bdp
,
2581 xfs_inode_t
*tdp
, *sip
;
2584 xfs_inode_t
*ips
[2];
2586 xfs_bmap_free_t free_list
;
2587 xfs_fsblock_t first_block
;
2590 vnode_t
*target_dir_vp
;
2591 bhv_desc_t
*src_bdp
;
2593 char *target_name
= VNAME(dentry
);
2596 target_dir_vp
= BHV_TO_VNODE(target_dir_bdp
);
2597 vn_trace_entry(target_dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
2598 vn_trace_entry(src_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
2600 target_namelen
= VNAMELEN(dentry
);
2601 if (VN_ISDIR(src_vp
))
2602 return XFS_ERROR(EPERM
);
2604 src_bdp
= vn_bhv_lookup_unlocked(VN_BHV_HEAD(src_vp
), &xfs_vnodeops
);
2605 sip
= XFS_BHVTOI(src_bdp
);
2606 tdp
= XFS_BHVTOI(target_dir_bdp
);
2608 if (XFS_FORCED_SHUTDOWN(mp
))
2609 return XFS_ERROR(EIO
);
2611 if (DM_EVENT_ENABLED(src_vp
->v_vfsp
, tdp
, DM_EVENT_LINK
)) {
2612 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_LINK
,
2613 target_dir_vp
, DM_RIGHT_NULL
,
2614 src_vp
, DM_RIGHT_NULL
,
2615 target_name
, NULL
, 0, 0, 0);
2620 /* Return through std_return after this point. */
2622 error
= XFS_QM_DQATTACH(mp
, sip
, 0);
2623 if (!error
&& sip
!= tdp
)
2624 error
= XFS_QM_DQATTACH(mp
, tdp
, 0);
2628 tp
= xfs_trans_alloc(mp
, XFS_TRANS_LINK
);
2629 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2630 resblks
= XFS_LINK_SPACE_RES(mp
, target_namelen
);
2631 error
= xfs_trans_reserve(tp
, resblks
, XFS_LINK_LOG_RES(mp
), 0,
2632 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2633 if (error
== ENOSPC
) {
2635 error
= xfs_trans_reserve(tp
, 0, XFS_LINK_LOG_RES(mp
), 0,
2636 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2643 if (sip
->i_ino
< tdp
->i_ino
) {
2651 xfs_lock_inodes(ips
, 2, 0, XFS_ILOCK_EXCL
);
2654 * Increment vnode ref counts since xfs_trans_commit &
2655 * xfs_trans_cancel will both unlock the inodes and
2656 * decrement the associated ref counts.
2659 VN_HOLD(target_dir_vp
);
2660 xfs_trans_ijoin(tp
, sip
, XFS_ILOCK_EXCL
);
2661 xfs_trans_ijoin(tp
, tdp
, XFS_ILOCK_EXCL
);
2664 * If the source has too many links, we can't make any more to it.
2666 if (sip
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2667 error
= XFS_ERROR(EMLINK
);
2672 * If we are using project inheritance, we only allow hard link
2673 * creation in our tree when the project IDs are the same; else
2674 * the tree quota mechanism could be circumvented.
2676 if (unlikely((tdp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
) &&
2677 (tdp
->i_d
.di_projid
!= sip
->i_d
.di_projid
))) {
2678 error
= XFS_ERROR(EPERM
);
2683 (error
= XFS_DIR_CANENTER(mp
, tp
, tdp
, target_name
,
2687 XFS_BMAP_INIT(&free_list
, &first_block
);
2689 error
= XFS_DIR_CREATENAME(mp
, tp
, tdp
, target_name
, target_namelen
,
2690 sip
->i_ino
, &first_block
, &free_list
,
2694 xfs_ichgtime(tdp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2696 xfs_trans_log_inode(tp
, tdp
, XFS_ILOG_CORE
);
2698 error
= xfs_bumplink(tp
, sip
);
2704 * If this is a synchronous mount, make sure that the
2705 * link transaction goes to disk before returning to
2708 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2709 xfs_trans_set_sync(tp
);
2712 error
= xfs_bmap_finish (&tp
, &free_list
, first_block
, &committed
);
2714 xfs_bmap_cancel(&free_list
);
2718 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2723 /* Fall through to std_return with error = 0. */
2725 if (DM_EVENT_ENABLED(src_vp
->v_vfsp
, sip
,
2726 DM_EVENT_POSTLINK
)) {
2727 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTLINK
,
2728 target_dir_vp
, DM_RIGHT_NULL
,
2729 src_vp
, DM_RIGHT_NULL
,
2730 target_name
, NULL
, 0, error
, 0);
2735 cancel_flags
|= XFS_TRANS_ABORT
;
2738 xfs_trans_cancel(tp
, cancel_flags
);
2748 bhv_desc_t
*dir_bdp
,
2754 char *dir_name
= VNAME(dentry
);
2756 xfs_inode_t
*cdp
; /* inode of created dir */
2757 vnode_t
*cvp
; /* vnode of created dir */
2763 xfs_bmap_free_t free_list
;
2764 xfs_fsblock_t first_block
;
2766 boolean_t dp_joined_to_trans
;
2767 boolean_t created
= B_FALSE
;
2768 int dm_event_sent
= 0;
2770 struct xfs_dquot
*udqp
, *gdqp
;
2775 dir_vp
= BHV_TO_VNODE(dir_bdp
);
2776 dp
= XFS_BHVTOI(dir_bdp
);
2779 if (XFS_FORCED_SHUTDOWN(mp
))
2780 return XFS_ERROR(EIO
);
2782 dir_namelen
= VNAMELEN(dentry
);
2785 dp_joined_to_trans
= B_FALSE
;
2786 dm_di_mode
= vap
->va_mode
;
2788 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_CREATE
)) {
2789 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
2790 dir_vp
, DM_RIGHT_NULL
, NULL
,
2791 DM_RIGHT_NULL
, dir_name
, NULL
,
2798 /* Return through std_return after this point. */
2800 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
2804 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
2805 prid
= dp
->i_d
.di_projid
;
2806 else if (vap
->va_mask
& XFS_AT_PROJID
)
2807 prid
= (xfs_prid_t
)vap
->va_projid
;
2809 prid
= (xfs_prid_t
)dfltprid
;
2812 * Make sure that we have allocated dquot(s) on disk.
2814 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
2815 current_fsuid(credp
), current_fsgid(credp
), prid
,
2816 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
2820 tp
= xfs_trans_alloc(mp
, XFS_TRANS_MKDIR
);
2821 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2822 resblks
= XFS_MKDIR_SPACE_RES(mp
, dir_namelen
);
2823 error
= xfs_trans_reserve(tp
, resblks
, XFS_MKDIR_LOG_RES(mp
), 0,
2824 XFS_TRANS_PERM_LOG_RES
, XFS_MKDIR_LOG_COUNT
);
2825 if (error
== ENOSPC
) {
2827 error
= xfs_trans_reserve(tp
, 0, XFS_MKDIR_LOG_RES(mp
), 0,
2828 XFS_TRANS_PERM_LOG_RES
,
2829 XFS_MKDIR_LOG_COUNT
);
2837 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
2840 * Check for directory link count overflow.
2842 if (dp
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2843 error
= XFS_ERROR(EMLINK
);
2848 * Reserve disk quota and the inode.
2850 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
2855 (error
= XFS_DIR_CANENTER(mp
, tp
, dp
, dir_name
, dir_namelen
)))
2858 * create the directory inode.
2860 error
= xfs_dir_ialloc(&tp
, dp
, vap
->va_mode
, 2,
2861 0, credp
, prid
, resblks
> 0,
2864 if (error
== ENOSPC
)
2871 * Now we add the directory inode to the transaction.
2872 * We waited until now since xfs_dir_ialloc might start
2873 * a new transaction. Had we joined the transaction
2874 * earlier, the locks might have gotten released.
2877 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2878 dp_joined_to_trans
= B_TRUE
;
2880 XFS_BMAP_INIT(&free_list
, &first_block
);
2882 error
= XFS_DIR_CREATENAME(mp
, tp
, dp
, dir_name
, dir_namelen
,
2883 cdp
->i_ino
, &first_block
, &free_list
,
2884 resblks
? resblks
- XFS_IALLOC_SPACE_RES(mp
) : 0);
2886 ASSERT(error
!= ENOSPC
);
2889 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2892 * Bump the in memory version number of the parent directory
2893 * so that other processes accessing it will recognize that
2894 * the directory has changed.
2898 error
= XFS_DIR_INIT(mp
, tp
, cdp
, dp
);
2904 error
= xfs_bumplink(tp
, dp
);
2909 cvp
= XFS_ITOV(cdp
);
2917 * Attach the dquots to the new inode and modify the icount incore.
2919 XFS_QM_DQVOPCREATE(mp
, tp
, cdp
, udqp
, gdqp
);
2922 * If this is a synchronous mount, make sure that the
2923 * mkdir transaction goes to disk before returning to
2926 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
2927 xfs_trans_set_sync(tp
);
2930 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
2936 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2937 XFS_QM_DQRELE(mp
, udqp
);
2938 XFS_QM_DQRELE(mp
, gdqp
);
2943 /* Fall through to std_return with error = 0 or errno from
2944 * xfs_trans_commit. */
2947 if ( (created
|| (error
!= 0 && dm_event_sent
!= 0)) &&
2948 DM_EVENT_ENABLED(dir_vp
->v_vfsp
, XFS_BHVTOI(dir_bdp
),
2949 DM_EVENT_POSTCREATE
)) {
2950 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTCREATE
,
2951 dir_vp
, DM_RIGHT_NULL
,
2952 created
? XFS_ITOV(cdp
):NULL
,
2955 dm_di_mode
, error
, 0);
2961 xfs_bmap_cancel(&free_list
);
2963 cancel_flags
|= XFS_TRANS_ABORT
;
2965 xfs_trans_cancel(tp
, cancel_flags
);
2966 XFS_QM_DQRELE(mp
, udqp
);
2967 XFS_QM_DQRELE(mp
, gdqp
);
2969 if (!dp_joined_to_trans
&& (dp
!= NULL
)) {
2970 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2983 bhv_desc_t
*dir_bdp
,
2987 char *name
= VNAME(dentry
);
2989 xfs_inode_t
*cdp
; /* child directory */
2993 xfs_bmap_free_t free_list
;
2994 xfs_fsblock_t first_block
;
3003 dir_vp
= BHV_TO_VNODE(dir_bdp
);
3004 dp
= XFS_BHVTOI(dir_bdp
);
3007 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
3009 if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp
)->i_mount
))
3010 return XFS_ERROR(EIO
);
3011 namelen
= VNAMELEN(dentry
);
3013 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_REMOVE
)) {
3014 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_REMOVE
,
3015 dir_vp
, DM_RIGHT_NULL
,
3016 NULL
, DM_RIGHT_NULL
,
3017 name
, NULL
, 0, 0, 0);
3019 return XFS_ERROR(error
);
3022 /* Return through std_return after this point. */
3027 * We need to get a reference to cdp before we get our log
3028 * reservation. The reason for this is that we cannot call
3029 * xfs_iget for an inode for which we do not have a reference
3030 * once we've acquired a log reservation. This is because the
3031 * inode we are trying to get might be in xfs_inactive going
3032 * for a log reservation. Since we'll have to wait for the
3033 * inactive code to complete before returning from xfs_iget,
3034 * we need to make sure that we don't have log space reserved
3035 * when we call xfs_iget. Instead we get an unlocked referece
3036 * to the inode before getting our log reservation.
3038 error
= xfs_get_dir_entry(dentry
, &cdp
);
3040 REMOVE_DEBUG_TRACE(__LINE__
);
3044 dm_di_mode
= cdp
->i_d
.di_mode
;
3047 * Get the dquots for the inodes.
3049 error
= XFS_QM_DQATTACH(mp
, dp
, 0);
3050 if (!error
&& dp
!= cdp
)
3051 error
= XFS_QM_DQATTACH(mp
, cdp
, 0);
3054 REMOVE_DEBUG_TRACE(__LINE__
);
3058 tp
= xfs_trans_alloc(mp
, XFS_TRANS_RMDIR
);
3059 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
3061 * We try to get the real space reservation first,
3062 * allowing for directory btree deletion(s) implying
3063 * possible bmap insert(s). If we can't get the space
3064 * reservation then we use 0 instead, and avoid the bmap
3065 * btree insert(s) in the directory code by, if the bmap
3066 * insert tries to happen, instead trimming the LAST
3067 * block from the directory.
3069 resblks
= XFS_REMOVE_SPACE_RES(mp
);
3070 error
= xfs_trans_reserve(tp
, resblks
, XFS_REMOVE_LOG_RES(mp
), 0,
3071 XFS_TRANS_PERM_LOG_RES
, XFS_DEFAULT_LOG_COUNT
);
3072 if (error
== ENOSPC
) {
3074 error
= xfs_trans_reserve(tp
, 0, XFS_REMOVE_LOG_RES(mp
), 0,
3075 XFS_TRANS_PERM_LOG_RES
, XFS_DEFAULT_LOG_COUNT
);
3078 ASSERT(error
!= ENOSPC
);
3083 XFS_BMAP_INIT(&free_list
, &first_block
);
3086 * Now lock the child directory inode and the parent directory
3087 * inode in the proper order. This will take care of validating
3088 * that the directory entry for the child directory inode has
3089 * not changed while we were obtaining a log reservation.
3091 error
= xfs_lock_dir_and_entry(dp
, dentry
, cdp
);
3093 xfs_trans_cancel(tp
, cancel_flags
);
3098 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
3101 * Only increment the parent directory vnode count if
3102 * we didn't bump it in looking up cdp. The only time
3103 * we don't bump it is when we're looking up ".".
3109 xfs_trans_ijoin(tp
, cdp
, XFS_ILOCK_EXCL
);
3111 ASSERT(cdp
->i_d
.di_nlink
>= 2);
3112 if (cdp
->i_d
.di_nlink
!= 2) {
3113 error
= XFS_ERROR(ENOTEMPTY
);
3116 if (!XFS_DIR_ISEMPTY(mp
, cdp
)) {
3117 error
= XFS_ERROR(ENOTEMPTY
);
3121 error
= XFS_DIR_REMOVENAME(mp
, tp
, dp
, name
, namelen
, cdp
->i_ino
,
3122 &first_block
, &free_list
, resblks
);
3127 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
3130 * Bump the in memory generation count on the parent
3131 * directory so that other can know that it has changed.
3136 * Drop the link from cdp's "..".
3138 error
= xfs_droplink(tp
, dp
);
3144 * Drop the link from dp to cdp.
3146 error
= xfs_droplink(tp
, cdp
);
3152 * Drop the "." link from cdp to self.
3154 error
= xfs_droplink(tp
, cdp
);
3159 /* Determine these before committing transaction */
3160 last_cdp_link
= (cdp
)->i_d
.di_nlink
==0;
3163 * Take an extra ref on the child vnode so that it
3164 * does not go to xfs_inactive() from within the commit.
3169 * If this is a synchronous mount, make sure that the
3170 * rmdir transaction goes to disk before returning to
3173 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
3174 xfs_trans_set_sync(tp
);
3177 error
= xfs_bmap_finish (&tp
, &free_list
, first_block
, &committed
);
3179 xfs_bmap_cancel(&free_list
);
3180 xfs_trans_cancel(tp
, (XFS_TRANS_RELEASE_LOG_RES
|
3186 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
3194 * Let interposed file systems know about removed links.
3196 VOP_LINK_REMOVED(XFS_ITOV(cdp
), dir_vp
, last_cdp_link
);
3200 /* Fall through to std_return with error = 0 or the errno
3201 * from xfs_trans_commit. */
3203 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_POSTREMOVE
)) {
3204 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTREMOVE
,
3205 dir_vp
, DM_RIGHT_NULL
,
3206 NULL
, DM_RIGHT_NULL
,
3207 name
, NULL
, dm_di_mode
,
3213 xfs_bmap_cancel(&free_list
);
3214 cancel_flags
|= XFS_TRANS_ABORT
;
3216 xfs_trans_cancel(tp
, cancel_flags
);
3224 * Read dp's entries starting at uiop->uio_offset and translate them into
3225 * bufsize bytes worth of struct dirents starting at bufbase.
3229 bhv_desc_t
*dir_bdp
,
3235 xfs_trans_t
*tp
= NULL
;
3238 xfs_off_t start_offset
;
3240 vn_trace_entry(BHV_TO_VNODE(dir_bdp
), __FUNCTION__
,
3241 (inst_t
*)__return_address
);
3242 dp
= XFS_BHVTOI(dir_bdp
);
3244 if (XFS_FORCED_SHUTDOWN(dp
->i_mount
)) {
3245 return XFS_ERROR(EIO
);
3248 lock_mode
= xfs_ilock_map_shared(dp
);
3249 start_offset
= uiop
->uio_offset
;
3250 error
= XFS_DIR_GETDENTS(dp
->i_mount
, tp
, dp
, uiop
, eofp
);
3251 if (start_offset
!= uiop
->uio_offset
) {
3252 xfs_ichgtime(dp
, XFS_ICHGTIME_ACC
);
3254 xfs_iunlock_map_shared(dp
, lock_mode
);
3265 bhv_desc_t
*dir_bdp
,
3278 xfs_bmap_free_t free_list
;
3279 xfs_fsblock_t first_block
;
3280 boolean_t dp_joined_to_trans
;
3284 xfs_fileoff_t first_fsb
;
3285 xfs_filblks_t fs_blocks
;
3287 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
3294 struct xfs_dquot
*udqp
, *gdqp
;
3296 char *link_name
= VNAME(dentry
);
3300 dir_vp
= BHV_TO_VNODE(dir_bdp
);
3301 dp
= XFS_BHVTOI(dir_bdp
);
3302 dp_joined_to_trans
= B_FALSE
;
3307 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
3311 if (XFS_FORCED_SHUTDOWN(mp
))
3312 return XFS_ERROR(EIO
);
3314 link_namelen
= VNAMELEN(dentry
);
3317 * Check component lengths of the target path name.
3319 pathlen
= strlen(target_path
);
3320 if (pathlen
>= MAXPATHLEN
) /* total string too long */
3321 return XFS_ERROR(ENAMETOOLONG
);
3322 if (pathlen
>= MAXNAMELEN
) { /* is any component too long? */
3326 for(total
= 0, path
= target_path
; total
< pathlen
;) {
3330 while(*path
== '/') {
3336 * Count up to the next slash or end of path.
3337 * Error out if the component is bigger than MAXNAMELEN.
3339 for(len
= 0; *path
!= '/' && total
< pathlen
;total
++, path
++) {
3340 if (++len
>= MAXNAMELEN
) {
3341 error
= ENAMETOOLONG
;
3348 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_SYMLINK
)) {
3349 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_SYMLINK
, dir_vp
,
3350 DM_RIGHT_NULL
, NULL
, DM_RIGHT_NULL
,
3351 link_name
, target_path
, 0, 0, 0);
3356 /* Return through std_return after this point. */
3359 if (dp
->i_d
.di_flags
& XFS_DIFLAG_PROJINHERIT
)
3360 prid
= dp
->i_d
.di_projid
;
3361 else if (vap
->va_mask
& XFS_AT_PROJID
)
3362 prid
= (xfs_prid_t
)vap
->va_projid
;
3364 prid
= (xfs_prid_t
)dfltprid
;
3367 * Make sure that we have allocated dquot(s) on disk.
3369 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
3370 current_fsuid(credp
), current_fsgid(credp
), prid
,
3371 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
3375 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SYMLINK
);
3376 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
3378 * The symlink will fit into the inode data fork?
3379 * There can't be any attributes so we get the whole variable part.
3381 if (pathlen
<= XFS_LITINO(mp
))
3384 fs_blocks
= XFS_B_TO_FSB(mp
, pathlen
);
3385 resblks
= XFS_SYMLINK_SPACE_RES(mp
, link_namelen
, fs_blocks
);
3386 error
= xfs_trans_reserve(tp
, resblks
, XFS_SYMLINK_LOG_RES(mp
), 0,
3387 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
3388 if (error
== ENOSPC
&& fs_blocks
== 0) {
3390 error
= xfs_trans_reserve(tp
, 0, XFS_SYMLINK_LOG_RES(mp
), 0,
3391 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
3399 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
3402 * Check whether the directory allows new symlinks or not.
3404 if (dp
->i_d
.di_flags
& XFS_DIFLAG_NOSYMLINKS
) {
3405 error
= XFS_ERROR(EPERM
);
3410 * Reserve disk quota : blocks and inode.
3412 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
3417 * Check for ability to enter directory entry, if no space reserved.
3420 (error
= XFS_DIR_CANENTER(mp
, tp
, dp
, link_name
, link_namelen
)))
3423 * Initialize the bmap freelist prior to calling either
3424 * bmapi or the directory create code.
3426 XFS_BMAP_INIT(&free_list
, &first_block
);
3429 * Allocate an inode for the symlink.
3431 error
= xfs_dir_ialloc(&tp
, dp
, S_IFLNK
| (vap
->va_mode
&~S_IFMT
),
3432 1, 0, credp
, prid
, resblks
> 0, &ip
, NULL
);
3434 if (error
== ENOSPC
)
3441 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
3442 dp_joined_to_trans
= B_TRUE
;
3445 * Also attach the dquot(s) to it, if applicable.
3447 XFS_QM_DQVOPCREATE(mp
, tp
, ip
, udqp
, gdqp
);
3450 resblks
-= XFS_IALLOC_SPACE_RES(mp
);
3452 * If the symlink will fit into the inode, write it inline.
3454 if (pathlen
<= XFS_IFORK_DSIZE(ip
)) {
3455 xfs_idata_realloc(ip
, pathlen
, XFS_DATA_FORK
);
3456 memcpy(ip
->i_df
.if_u1
.if_data
, target_path
, pathlen
);
3457 ip
->i_d
.di_size
= pathlen
;
3460 * The inode was initially created in extent format.
3462 ip
->i_df
.if_flags
&= ~(XFS_IFEXTENTS
| XFS_IFBROOT
);
3463 ip
->i_df
.if_flags
|= XFS_IFINLINE
;
3465 ip
->i_d
.di_format
= XFS_DINODE_FMT_LOCAL
;
3466 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_DDATA
| XFS_ILOG_CORE
);
3470 nmaps
= SYMLINK_MAPS
;
3472 error
= xfs_bmapi(tp
, ip
, first_fsb
, fs_blocks
,
3473 XFS_BMAPI_WRITE
| XFS_BMAPI_METADATA
,
3474 &first_block
, resblks
, mval
, &nmaps
,
3481 resblks
-= fs_blocks
;
3482 ip
->i_d
.di_size
= pathlen
;
3483 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
3485 cur_chunk
= target_path
;
3486 for (n
= 0; n
< nmaps
; n
++) {
3487 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
3488 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
3489 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
, d
,
3490 BTOBB(byte_cnt
), 0);
3491 ASSERT(bp
&& !XFS_BUF_GETERROR(bp
));
3492 if (pathlen
< byte_cnt
) {
3495 pathlen
-= byte_cnt
;
3497 memcpy(XFS_BUF_PTR(bp
), cur_chunk
, byte_cnt
);
3498 cur_chunk
+= byte_cnt
;
3500 xfs_trans_log_buf(tp
, bp
, 0, byte_cnt
- 1);
3505 * Create the directory entry for the symlink.
3507 error
= XFS_DIR_CREATENAME(mp
, tp
, dp
, link_name
, link_namelen
,
3508 ip
->i_ino
, &first_block
, &free_list
, resblks
);
3512 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
3513 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
3516 * Bump the in memory version number of the parent directory
3517 * so that other processes accessing it will recognize that
3518 * the directory has changed.
3523 * If this is a synchronous mount, make sure that the
3524 * symlink transaction goes to disk before returning to
3527 if (mp
->m_flags
& (XFS_MOUNT_WSYNC
|XFS_MOUNT_DIRSYNC
)) {
3528 xfs_trans_set_sync(tp
);
3532 * xfs_trans_commit normally decrements the vnode ref count
3533 * when it unlocks the inode. Since we want to return the
3534 * vnode to the caller, we bump the vnode ref count now.
3538 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
3542 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
3543 XFS_QM_DQRELE(mp
, udqp
);
3544 XFS_QM_DQRELE(mp
, gdqp
);
3546 /* Fall through to std_return with error = 0 or errno from
3547 * xfs_trans_commit */
3549 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, XFS_BHVTOI(dir_bdp
),
3550 DM_EVENT_POSTSYMLINK
)) {
3551 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTSYMLINK
,
3552 dir_vp
, DM_RIGHT_NULL
,
3553 error
? NULL
: XFS_ITOV(ip
),
3554 DM_RIGHT_NULL
, link_name
, target_path
,
3570 xfs_bmap_cancel(&free_list
);
3571 cancel_flags
|= XFS_TRANS_ABORT
;
3573 xfs_trans_cancel(tp
, cancel_flags
);
3574 XFS_QM_DQRELE(mp
, udqp
);
3575 XFS_QM_DQRELE(mp
, gdqp
);
3577 if (!dp_joined_to_trans
&& (dp
!= NULL
)) {
3578 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
3588 * A fid routine that takes a pointer to a previously allocated
3589 * fid structure (like xfs_fast_fid) but uses a 64 bit inode number.
3599 vn_trace_entry(BHV_TO_VNODE(bdp
), __FUNCTION__
,
3600 (inst_t
*)__return_address
);
3601 ASSERT(sizeof(fid_t
) >= sizeof(xfs_fid2_t
));
3603 xfid
= (xfs_fid2_t
*)fidp
;
3604 ip
= XFS_BHVTOI(bdp
);
3605 xfid
->fid_len
= sizeof(xfs_fid2_t
) - sizeof(xfid
->fid_len
);
3608 * use memcpy because the inode is a long long and there's no
3609 * assurance that xfid->fid_ino is properly aligned.
3611 memcpy(&xfid
->fid_ino
, &ip
->i_ino
, sizeof(xfid
->fid_ino
));
3612 xfid
->fid_gen
= ip
->i_d
.di_gen
;
3629 vp
= BHV_TO_VNODE(bdp
);
3632 ip
= XFS_BHVTOI(bdp
);
3633 if (locktype
== VRWLOCK_WRITE
) {
3634 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
3635 } else if (locktype
== VRWLOCK_TRY_READ
) {
3636 return (xfs_ilock_nowait(ip
, XFS_IOLOCK_SHARED
));
3637 } else if (locktype
== VRWLOCK_TRY_WRITE
) {
3638 return (xfs_ilock_nowait(ip
, XFS_IOLOCK_EXCL
));
3640 ASSERT((locktype
== VRWLOCK_READ
) ||
3641 (locktype
== VRWLOCK_WRITE_DIRECT
));
3642 xfs_ilock(ip
, XFS_IOLOCK_SHARED
);
3660 vp
= BHV_TO_VNODE(bdp
);
3663 ip
= XFS_BHVTOI(bdp
);
3664 if (locktype
== VRWLOCK_WRITE
) {
3666 * In the write case, we may have added a new entry to
3667 * the reference cache. This might store a pointer to
3668 * an inode to be released in this inode. If it is there,
3669 * clear the pointer and release the inode after unlocking
3672 xfs_refcache_iunlock(ip
, XFS_IOLOCK_EXCL
);
3674 ASSERT((locktype
== VRWLOCK_READ
) ||
3675 (locktype
== VRWLOCK_WRITE_DIRECT
));
3676 xfs_iunlock(ip
, XFS_IOLOCK_SHARED
);
3688 xfs_inode_log_item_t
*iip
;
3691 ip
= XFS_BHVTOI(bdp
);
3695 if (XFS_FORCED_SHUTDOWN(mp
))
3696 return XFS_ERROR(EIO
);
3699 * Bypass inodes which have already been cleaned by
3700 * the inode flush clustering code inside xfs_iflush
3702 if ((ip
->i_update_core
== 0) &&
3703 ((iip
== NULL
) || !(iip
->ili_format
.ilf_fields
& XFS_ILOG_ALL
)))
3706 if (flags
& FLUSH_LOG
) {
3707 if (iip
&& iip
->ili_last_lsn
) {
3708 xlog_t
*log
= mp
->m_log
;
3710 int s
, log_flags
= XFS_LOG_FORCE
;
3712 s
= GRANT_LOCK(log
);
3713 sync_lsn
= log
->l_last_sync_lsn
;
3714 GRANT_UNLOCK(log
, s
);
3716 if ((XFS_LSN_CMP(iip
->ili_last_lsn
, sync_lsn
) <= 0))
3719 if (flags
& FLUSH_SYNC
)
3720 log_flags
|= XFS_LOG_SYNC
;
3721 return xfs_log_force(mp
, iip
->ili_last_lsn
, log_flags
);
3726 * We make this non-blocking if the inode is contended,
3727 * return EAGAIN to indicate to the caller that they
3728 * did not succeed. This prevents the flush path from
3729 * blocking on inodes inside another operation right
3730 * now, they get caught later by xfs_sync.
3732 if (flags
& FLUSH_INODE
) {
3735 if (xfs_ipincount(ip
))
3738 if (flags
& FLUSH_SYNC
) {
3739 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
3741 } else if (xfs_ilock_nowait(ip
, XFS_ILOCK_SHARED
)) {
3742 if (xfs_ipincount(ip
) || !xfs_iflock_nowait(ip
)) {
3743 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
3750 if (flags
& FLUSH_SYNC
)
3751 flush_flags
= XFS_IFLUSH_SYNC
;
3753 flush_flags
= XFS_IFLUSH_ASYNC
;
3755 error
= xfs_iflush(ip
, flush_flags
);
3756 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
3775 if (!capable(CAP_SYS_ADMIN
))
3776 return XFS_ERROR(EPERM
);
3778 ip
= XFS_BHVTOI(bdp
);
3781 if (XFS_FORCED_SHUTDOWN(mp
))
3782 return XFS_ERROR(EIO
);
3784 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SET_DMATTRS
);
3785 error
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES (mp
), 0, 0, 0);
3787 xfs_trans_cancel(tp
, 0);
3790 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3791 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3793 ip
->i_iocore
.io_dmevmask
= ip
->i_d
.di_dmevmask
= evmask
;
3794 ip
->i_iocore
.io_dmstate
= ip
->i_d
.di_dmstate
= state
;
3796 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
3798 error
= xfs_trans_commit(tp
, 0, NULL
);
3814 vp
= BHV_TO_VNODE(bdp
);
3815 ip
= XFS_BHVTOI(bdp
);
3817 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
3819 ASSERT(!VN_MAPPED(vp
));
3821 /* bad inode, get out here ASAP */
3829 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) || ip
->i_delayed_blks
== 0);
3830 ASSERT(VN_CACHED(vp
) == 0);
3832 /* If we have nothing to flush with this inode then complete the
3833 * teardown now, otherwise break the link between the xfs inode
3834 * and the linux inode and clean up the xfs inode later. This
3835 * avoids flushing the inode to disk during the delete operation
3838 if (!ip
->i_update_core
&& (ip
->i_itemp
== NULL
)) {
3839 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3841 return xfs_finish_reclaim(ip
, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC
);
3843 xfs_mount_t
*mp
= ip
->i_mount
;
3845 /* Protect sync from us */
3846 XFS_MOUNT_ILOCK(mp
);
3847 vn_bhv_remove(VN_BHV_HEAD(vp
), XFS_ITOBHV(ip
));
3848 list_add_tail(&ip
->i_reclaim
, &mp
->m_del_inodes
);
3849 ip
->i_flags
|= XFS_IRECLAIMABLE
;
3850 XFS_MOUNT_IUNLOCK(mp
);
3861 xfs_ihash_t
*ih
= ip
->i_hash
;
3862 vnode_t
*vp
= XFS_ITOV_NULL(ip
);
3865 if (vp
&& VN_BAD(vp
))
3868 /* The hash lock here protects a thread in xfs_iget_core from
3869 * racing with us on linking the inode back with a vnode.
3870 * Once we have the XFS_IRECLAIM flag set it will not touch
3873 write_lock(&ih
->ih_lock
);
3874 if ((ip
->i_flags
& XFS_IRECLAIM
) ||
3875 (!(ip
->i_flags
& XFS_IRECLAIMABLE
) && vp
== NULL
)) {
3876 write_unlock(&ih
->ih_lock
);
3879 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3883 ip
->i_flags
|= XFS_IRECLAIM
;
3884 write_unlock(&ih
->ih_lock
);
3887 * If the inode is still dirty, then flush it out. If the inode
3888 * is not in the AIL, then it will be OK to flush it delwri as
3889 * long as xfs_iflush() does not keep any references to the inode.
3890 * We leave that decision up to xfs_iflush() since it has the
3891 * knowledge of whether it's OK to simply do a delwri flush of
3892 * the inode or whether we need to wait until the inode is
3893 * pulled from the AIL.
3894 * We get the flush lock regardless, though, just to make sure
3895 * we don't free it while it is being flushed.
3897 if (!XFS_FORCED_SHUTDOWN(ip
->i_mount
)) {
3899 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3903 if (ip
->i_update_core
||
3904 ((ip
->i_itemp
!= NULL
) &&
3905 (ip
->i_itemp
->ili_format
.ilf_fields
!= 0))) {
3906 error
= xfs_iflush(ip
, sync_mode
);
3908 * If we hit an error, typically because of filesystem
3909 * shutdown, we don't need to let vn_reclaim to know
3910 * because we're gonna reclaim the inode anyway.
3913 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3916 xfs_iflock(ip
); /* synchronize with xfs_iflush_done */
3919 ASSERT(ip
->i_update_core
== 0);
3920 ASSERT(ip
->i_itemp
== NULL
||
3921 ip
->i_itemp
->ili_format
.ilf_fields
== 0);
3922 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3923 } else if (locked
) {
3925 * We are not interested in doing an iflush if we're
3926 * in the process of shutting down the filesystem forcibly.
3927 * So, just reclaim the inode.
3930 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3939 xfs_finish_reclaim_all(xfs_mount_t
*mp
, int noblock
)
3942 xfs_inode_t
*ip
, *n
;
3947 XFS_MOUNT_ILOCK(mp
);
3948 list_for_each_entry_safe(ip
, n
, &mp
->m_del_inodes
, i_reclaim
) {
3950 if (xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
) == 0)
3952 if (xfs_ipincount(ip
) ||
3953 !xfs_iflock_nowait(ip
)) {
3954 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3958 XFS_MOUNT_IUNLOCK(mp
);
3959 xfs_finish_reclaim(ip
, noblock
,
3960 XFS_IFLUSH_DELWRI_ELSE_ASYNC
);
3968 XFS_MOUNT_IUNLOCK(mp
);
3973 * xfs_alloc_file_space()
3974 * This routine allocates disk space for the given file.
3976 * If alloc_type == 0, this request is for an ALLOCSP type
3977 * request which will change the file size. In this case, no
3978 * DMAPI event will be generated by the call. A TRUNCATE event
3979 * will be generated later by xfs_setattr.
3981 * If alloc_type != 0, this request is for a RESVSP type
3982 * request, and a DMAPI DM_EVENT_WRITE will be generated if the
3983 * lower block boundary byte address is less than the file's
3992 xfs_alloc_file_space(
3999 xfs_filblks_t allocated_fsb
;
4000 xfs_filblks_t allocatesize_fsb
;
4003 xfs_filblks_t datablocks
;
4005 xfs_fsblock_t firstfsb
;
4006 xfs_bmap_free_t free_list
;
4007 xfs_bmbt_irec_t
*imapp
;
4008 xfs_bmbt_irec_t imaps
[1];
4015 xfs_fileoff_t startoffset_fsb
;
4017 int xfs_bmapi_flags
;
4019 vn_trace_entry(XFS_ITOV(ip
), __FUNCTION__
, (inst_t
*)__return_address
);
4022 if (XFS_FORCED_SHUTDOWN(mp
))
4023 return XFS_ERROR(EIO
);
4026 * determine if this is a realtime file
4028 if ((rt
= XFS_IS_REALTIME_INODE(ip
)) != 0) {
4029 if (ip
->i_d
.di_extsize
)
4030 rtextsize
= ip
->i_d
.di_extsize
;
4032 rtextsize
= mp
->m_sb
.sb_rextsize
;
4036 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
4040 return XFS_ERROR(EINVAL
);
4046 xfs_bmapi_flags
= XFS_BMAPI_WRITE
| (alloc_type
? XFS_BMAPI_PREALLOC
: 0);
4047 startoffset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
4048 allocatesize_fsb
= XFS_B_TO_FSB(mp
, count
);
4050 /* Generate a DMAPI event if needed. */
4051 if (alloc_type
!= 0 && offset
< ip
->i_d
.di_size
&&
4052 (attr_flags
&ATTR_DMI
) == 0 &&
4053 DM_EVENT_ENABLED(XFS_MTOVFS(mp
), ip
, DM_EVENT_WRITE
)) {
4054 xfs_off_t end_dmi_offset
;
4056 end_dmi_offset
= offset
+len
;
4057 if (end_dmi_offset
> ip
->i_d
.di_size
)
4058 end_dmi_offset
= ip
->i_d
.di_size
;
4059 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, XFS_ITOV(ip
),
4060 offset
, end_dmi_offset
- offset
,
4067 * allocate file space until done or until there is an error
4070 while (allocatesize_fsb
&& !error
) {
4072 * determine if reserving space on
4073 * the data or realtime partition.
4078 s
= startoffset_fsb
;
4079 do_div(s
, rtextsize
);
4081 e
= roundup_64(startoffset_fsb
+ allocatesize_fsb
,
4083 numrtextents
= (int)(e
- s
) / mp
->m_sb
.sb_rextsize
;
4086 datablocks
= allocatesize_fsb
;
4091 * allocate and setup the transaction
4093 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
4094 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, datablocks
);
4095 error
= xfs_trans_reserve(tp
,
4097 XFS_WRITE_LOG_RES(mp
),
4099 XFS_TRANS_PERM_LOG_RES
,
4100 XFS_WRITE_LOG_COUNT
);
4103 * check for running out of space
4107 * Free the transaction structure.
4109 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
4110 xfs_trans_cancel(tp
, 0);
4113 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
4114 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
,
4115 ip
->i_udquot
, ip
->i_gdquot
, resblks
, 0, 0);
4119 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
4120 xfs_trans_ihold(tp
, ip
);
4123 * issue the bmapi() call to allocate the blocks
4125 XFS_BMAP_INIT(&free_list
, &firstfsb
);
4126 error
= xfs_bmapi(tp
, ip
, startoffset_fsb
,
4127 allocatesize_fsb
, xfs_bmapi_flags
,
4128 &firstfsb
, 0, imapp
, &reccount
,
4135 * complete the transaction
4137 error
= xfs_bmap_finish(&tp
, &free_list
, firstfsb
, &committed
);
4142 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
4143 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4148 allocated_fsb
= imapp
->br_blockcount
;
4150 if (reccount
== 0) {
4151 error
= XFS_ERROR(ENOSPC
);
4155 startoffset_fsb
+= allocated_fsb
;
4156 allocatesize_fsb
-= allocated_fsb
;
4159 if (error
== ENOSPC
&& (attr_flags
&ATTR_DMI
) == 0 &&
4160 DM_EVENT_ENABLED(XFS_MTOVFS(mp
), ip
, DM_EVENT_NOSPACE
)) {
4162 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_NOSPACE
,
4163 XFS_ITOV(ip
), DM_RIGHT_NULL
,
4164 XFS_ITOV(ip
), DM_RIGHT_NULL
,
4165 NULL
, NULL
, 0, 0, 0); /* Delay flag intentionally unused */
4167 goto retry
; /* Maybe DMAPI app. has made space */
4168 /* else fall through with error from XFS_SEND_DATA */
4174 xfs_bmap_cancel(&free_list
);
4176 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
4177 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4178 goto dmapi_enospc_check
;
4182 * Zero file bytes between startoff and endoff inclusive.
4183 * The iolock is held exclusive and no blocks are buffered.
4186 xfs_zero_remaining_bytes(
4191 xfs_bmbt_irec_t imap
;
4192 xfs_fileoff_t offset_fsb
;
4193 xfs_off_t lastoffset
;
4196 xfs_mount_t
*mp
= ip
->i_mount
;
4200 bp
= xfs_buf_get_noaddr(mp
->m_sb
.sb_blocksize
,
4201 ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
?
4202 mp
->m_rtdev_targp
: mp
->m_ddev_targp
);
4204 for (offset
= startoff
; offset
<= endoff
; offset
= lastoffset
+ 1) {
4205 offset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
4207 error
= xfs_bmapi(NULL
, ip
, offset_fsb
, 1, 0, NULL
, 0, &imap
,
4209 if (error
|| nimap
< 1)
4211 ASSERT(imap
.br_blockcount
>= 1);
4212 ASSERT(imap
.br_startoff
== offset_fsb
);
4213 lastoffset
= XFS_FSB_TO_B(mp
, imap
.br_startoff
+ 1) - 1;
4214 if (lastoffset
> endoff
)
4215 lastoffset
= endoff
;
4216 if (imap
.br_startblock
== HOLESTARTBLOCK
)
4218 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
4219 if (imap
.br_state
== XFS_EXT_UNWRITTEN
)
4222 XFS_BUF_UNWRITE(bp
);
4224 XFS_BUF_SET_ADDR(bp
, XFS_FSB_TO_DB(ip
, imap
.br_startblock
));
4226 if ((error
= xfs_iowait(bp
))) {
4227 xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
4228 mp
, bp
, XFS_BUF_ADDR(bp
));
4231 memset(XFS_BUF_PTR(bp
) +
4232 (offset
- XFS_FSB_TO_B(mp
, imap
.br_startoff
)),
4233 0, lastoffset
- offset
+ 1);
4238 if ((error
= xfs_iowait(bp
))) {
4239 xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
4240 mp
, bp
, XFS_BUF_ADDR(bp
));
4249 * xfs_free_file_space()
4250 * This routine frees disk space for the given file.
4252 * This routine is only called by xfs_change_file_space
4253 * for an UNRESVSP type call.
4261 xfs_free_file_space(
4270 xfs_off_t end_dmi_offset
;
4271 xfs_fileoff_t endoffset_fsb
;
4273 xfs_fsblock_t firstfsb
;
4274 xfs_bmap_free_t free_list
;
4276 xfs_bmbt_irec_t imap
;
4284 xfs_fileoff_t startoffset_fsb
;
4286 int need_iolock
= 1;
4291 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
4293 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
4297 if (len
<= 0) /* if nothing being freed */
4299 rt
= (ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
);
4300 startoffset_fsb
= XFS_B_TO_FSB(mp
, offset
);
4301 end_dmi_offset
= offset
+ len
;
4302 endoffset_fsb
= XFS_B_TO_FSBT(mp
, end_dmi_offset
);
4304 if (offset
< ip
->i_d
.di_size
&&
4305 (attr_flags
& ATTR_DMI
) == 0 &&
4306 DM_EVENT_ENABLED(XFS_MTOVFS(mp
), ip
, DM_EVENT_WRITE
)) {
4307 if (end_dmi_offset
> ip
->i_d
.di_size
)
4308 end_dmi_offset
= ip
->i_d
.di_size
;
4309 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, vp
,
4310 offset
, end_dmi_offset
- offset
,
4311 AT_DELAY_FLAG(attr_flags
), NULL
);
4316 ASSERT(attr_flags
& ATTR_NOLOCK
? attr_flags
& ATTR_DMI
: 1);
4317 if (attr_flags
& ATTR_NOLOCK
)
4320 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
4322 rounding
= MAX((__uint8_t
)(1 << mp
->m_sb
.sb_blocklog
),
4324 ilen
= len
+ (offset
& (rounding
- 1));
4325 ioffset
= offset
& ~(rounding
- 1);
4326 if (ilen
& (rounding
- 1))
4327 ilen
= (ilen
+ rounding
) & ~(rounding
- 1);
4329 if (VN_CACHED(vp
) != 0) {
4330 xfs_inval_cached_trace(&ip
->i_iocore
, ioffset
, -1,
4331 ctooff(offtoct(ioffset
)), -1);
4332 VOP_FLUSHINVAL_PAGES(vp
, ctooff(offtoct(ioffset
)),
4333 -1, FI_REMAPF_LOCKED
);
4337 * Need to zero the stuff we're not freeing, on disk.
4338 * If its a realtime file & can't use unwritten extents then we
4339 * actually need to zero the extent edges. Otherwise xfs_bunmapi
4340 * will take care of it for us.
4342 if (rt
&& !XFS_SB_VERSION_HASEXTFLGBIT(&mp
->m_sb
)) {
4344 error
= xfs_bmapi(NULL
, ip
, startoffset_fsb
, 1, 0, NULL
, 0,
4345 &imap
, &nimap
, NULL
);
4347 goto out_unlock_iolock
;
4348 ASSERT(nimap
== 0 || nimap
== 1);
4349 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
4352 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
4353 block
= imap
.br_startblock
;
4354 mod
= do_div(block
, mp
->m_sb
.sb_rextsize
);
4356 startoffset_fsb
+= mp
->m_sb
.sb_rextsize
- mod
;
4359 error
= xfs_bmapi(NULL
, ip
, endoffset_fsb
- 1, 1, 0, NULL
, 0,
4360 &imap
, &nimap
, NULL
);
4362 goto out_unlock_iolock
;
4363 ASSERT(nimap
== 0 || nimap
== 1);
4364 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
4365 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
4367 if (mod
&& (mod
!= mp
->m_sb
.sb_rextsize
))
4368 endoffset_fsb
-= mod
;
4371 if ((done
= (endoffset_fsb
<= startoffset_fsb
)))
4373 * One contiguous piece to clear
4375 error
= xfs_zero_remaining_bytes(ip
, offset
, offset
+ len
- 1);
4378 * Some full blocks, possibly two pieces to clear
4380 if (offset
< XFS_FSB_TO_B(mp
, startoffset_fsb
))
4381 error
= xfs_zero_remaining_bytes(ip
, offset
,
4382 XFS_FSB_TO_B(mp
, startoffset_fsb
) - 1);
4384 XFS_FSB_TO_B(mp
, endoffset_fsb
) < offset
+ len
)
4385 error
= xfs_zero_remaining_bytes(ip
,
4386 XFS_FSB_TO_B(mp
, endoffset_fsb
),
4391 * free file space until done or until there is an error
4393 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, 0);
4394 while (!error
&& !done
) {
4397 * allocate and setup the transaction
4399 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
4400 error
= xfs_trans_reserve(tp
,
4402 XFS_WRITE_LOG_RES(mp
),
4404 XFS_TRANS_PERM_LOG_RES
,
4405 XFS_WRITE_LOG_COUNT
);
4408 * check for running out of space
4412 * Free the transaction structure.
4414 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
4415 xfs_trans_cancel(tp
, 0);
4418 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
4419 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
,
4420 ip
->i_udquot
, ip
->i_gdquot
, resblks
, 0, rt
?
4421 XFS_QMOPT_RES_RTBLKS
: XFS_QMOPT_RES_REGBLKS
);
4425 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
4426 xfs_trans_ihold(tp
, ip
);
4429 * issue the bunmapi() call to free the blocks
4431 XFS_BMAP_INIT(&free_list
, &firstfsb
);
4432 error
= xfs_bunmapi(tp
, ip
, startoffset_fsb
,
4433 endoffset_fsb
- startoffset_fsb
,
4434 0, 2, &firstfsb
, &free_list
, &done
);
4440 * complete the transaction
4442 error
= xfs_bmap_finish(&tp
, &free_list
, firstfsb
, &committed
);
4447 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
4448 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4453 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
4457 xfs_bmap_cancel(&free_list
);
4459 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
4460 xfs_iunlock(ip
, need_iolock
? (XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
) :
4466 * xfs_change_file_space()
4467 * This routine allocates or frees disk space for the given file.
4468 * The user specified parameters are checked for alignment and size
4477 xfs_change_file_space(
4491 xfs_off_t startoffset
;
4497 vp
= BHV_TO_VNODE(bdp
);
4498 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
4500 ip
= XFS_BHVTOI(bdp
);
4504 * must be a regular file and have write permission
4507 return XFS_ERROR(EINVAL
);
4509 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
4511 if ((error
= xfs_iaccess(ip
, S_IWUSR
, credp
))) {
4512 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
4516 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
4518 switch (bf
->l_whence
) {
4519 case 0: /*SEEK_SET*/
4521 case 1: /*SEEK_CUR*/
4522 bf
->l_start
+= offset
;
4524 case 2: /*SEEK_END*/
4525 bf
->l_start
+= ip
->i_d
.di_size
;
4528 return XFS_ERROR(EINVAL
);
4531 llen
= bf
->l_len
> 0 ? bf
->l_len
- 1 : bf
->l_len
;
4533 if ( (bf
->l_start
< 0)
4534 || (bf
->l_start
> XFS_MAXIOFFSET(mp
))
4535 || (bf
->l_start
+ llen
< 0)
4536 || (bf
->l_start
+ llen
> XFS_MAXIOFFSET(mp
)))
4537 return XFS_ERROR(EINVAL
);
4541 startoffset
= bf
->l_start
;
4542 fsize
= ip
->i_d
.di_size
;
4545 * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
4547 * These calls do NOT zero the data space allocated to the file,
4548 * nor do they change the file size.
4550 * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
4552 * These calls cause the new file data to be zeroed and the file
4553 * size to be changed.
4555 setprealloc
= clrprealloc
= 0;
4558 case XFS_IOC_RESVSP
:
4559 case XFS_IOC_RESVSP64
:
4560 error
= xfs_alloc_file_space(ip
, startoffset
, bf
->l_len
,
4567 case XFS_IOC_UNRESVSP
:
4568 case XFS_IOC_UNRESVSP64
:
4569 if ((error
= xfs_free_file_space(ip
, startoffset
, bf
->l_len
,
4574 case XFS_IOC_ALLOCSP
:
4575 case XFS_IOC_ALLOCSP64
:
4576 case XFS_IOC_FREESP
:
4577 case XFS_IOC_FREESP64
:
4578 if (startoffset
> fsize
) {
4579 error
= xfs_alloc_file_space(ip
, fsize
,
4580 startoffset
- fsize
, 0, attr_flags
);
4585 va
.va_mask
= XFS_AT_SIZE
;
4586 va
.va_size
= startoffset
;
4588 error
= xfs_setattr(bdp
, &va
, attr_flags
, credp
);
4598 return XFS_ERROR(EINVAL
);
4602 * update the inode timestamp, mode, and prealloc flag bits
4604 tp
= xfs_trans_alloc(mp
, XFS_TRANS_WRITEID
);
4606 if ((error
= xfs_trans_reserve(tp
, 0, XFS_WRITEID_LOG_RES(mp
),
4609 xfs_trans_cancel(tp
, 0);
4613 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
4615 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
4616 xfs_trans_ihold(tp
, ip
);
4618 if ((attr_flags
& ATTR_DMI
) == 0) {
4619 ip
->i_d
.di_mode
&= ~S_ISUID
;
4622 * Note that we don't have to worry about mandatory
4623 * file locking being disabled here because we only
4624 * clear the S_ISGID bit if the Group execute bit is
4625 * on, but if it was on then mandatory locking wouldn't
4626 * have been enabled.
4628 if (ip
->i_d
.di_mode
& S_IXGRP
)
4629 ip
->i_d
.di_mode
&= ~S_ISGID
;
4631 xfs_ichgtime(ip
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
4634 ip
->i_d
.di_flags
|= XFS_DIFLAG_PREALLOC
;
4635 else if (clrprealloc
)
4636 ip
->i_d
.di_flags
&= ~XFS_DIFLAG_PREALLOC
;
4638 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
4639 xfs_trans_set_sync(tp
);
4641 error
= xfs_trans_commit(tp
, 0, NULL
);
4643 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4648 vnodeops_t xfs_vnodeops
= {
4649 BHV_IDENTITY_INIT(VN_BHV_XFS
,VNODE_POSITION_XFS
),
4650 .vop_open
= xfs_open
,
4651 .vop_read
= xfs_read
,
4652 #ifdef HAVE_SENDFILE
4653 .vop_sendfile
= xfs_sendfile
,
4655 .vop_write
= xfs_write
,
4656 .vop_ioctl
= xfs_ioctl
,
4657 .vop_getattr
= xfs_getattr
,
4658 .vop_setattr
= xfs_setattr
,
4659 .vop_access
= xfs_access
,
4660 .vop_lookup
= xfs_lookup
,
4661 .vop_create
= xfs_create
,
4662 .vop_remove
= xfs_remove
,
4663 .vop_link
= xfs_link
,
4664 .vop_rename
= xfs_rename
,
4665 .vop_mkdir
= xfs_mkdir
,
4666 .vop_rmdir
= xfs_rmdir
,
4667 .vop_readdir
= xfs_readdir
,
4668 .vop_symlink
= xfs_symlink
,
4669 .vop_readlink
= xfs_readlink
,
4670 .vop_fsync
= xfs_fsync
,
4671 .vop_inactive
= xfs_inactive
,
4672 .vop_fid2
= xfs_fid2
,
4673 .vop_rwlock
= xfs_rwlock
,
4674 .vop_rwunlock
= xfs_rwunlock
,
4675 .vop_bmap
= xfs_bmap
,
4676 .vop_reclaim
= xfs_reclaim
,
4677 .vop_attr_get
= xfs_attr_get
,
4678 .vop_attr_set
= xfs_attr_set
,
4679 .vop_attr_remove
= xfs_attr_remove
,
4680 .vop_attr_list
= xfs_attr_list
,
4681 .vop_link_removed
= (vop_link_removed_t
)fs_noval
,
4682 .vop_vnode_change
= (vop_vnode_change_t
)fs_noval
,
4683 .vop_tosspages
= fs_tosspages
,
4684 .vop_flushinval_pages
= fs_flushinval_pages
,
4685 .vop_flush_pages
= fs_flush_pages
,
4686 .vop_release
= xfs_release
,
4687 .vop_iflush
= xfs_inode_flush
,