2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
34 #include "xfs_macros.h"
35 #include "xfs_types.h"
38 #include "xfs_trans.h"
43 #include "xfs_dmapi.h"
44 #include "xfs_mount.h"
45 #include "xfs_alloc_btree.h"
46 #include "xfs_bmap_btree.h"
47 #include "xfs_ialloc_btree.h"
48 #include "xfs_itable.h"
49 #include "xfs_btree.h"
50 #include "xfs_ialloc.h"
51 #include "xfs_alloc.h"
52 #include "xfs_attr_sf.h"
53 #include "xfs_dir_sf.h"
54 #include "xfs_dir2_sf.h"
55 #include "xfs_dinode.h"
56 #include "xfs_inode_item.h"
57 #include "xfs_inode.h"
59 #include "xfs_da_btree.h"
62 #include "xfs_refcache.h"
63 #include "xfs_error.h"
65 #include "xfs_rtalloc.h"
66 #include "xfs_quota.h"
67 #include "xfs_utils.h"
68 #include "xfs_trans_space.h"
69 #include "xfs_dir_leaf.h"
71 #include "xfs_log_priv.h"
75 * The maximum pathlen is 1024 bytes. Since the minimum file system
76 * blocksize is 512 bytes, we can get a max of 2 extents back from
79 #define SYMLINK_MAPS 2
82 * For xfs, we check that the file isn't too big to be opened by this kernel.
83 * No other open action is required for regular files. Devices are handled
84 * through the specfs file system, pipes through fifofs. Device and
85 * fifo vnodes are "wrapped" by specfs and fifofs vnodes, respectively,
86 * when a new vnode is first looked up or created.
97 vp
= BHV_TO_VNODE(bdp
);
100 if (XFS_FORCED_SHUTDOWN(ip
->i_mount
))
101 return XFS_ERROR(EIO
);
104 * If it's a directory with any blocks, read-ahead block 0
105 * as we're almost certain to have the next operation be a read there.
107 if (vp
->v_type
== VDIR
&& ip
->i_d
.di_nextents
> 0) {
108 mode
= xfs_ilock_map_shared(ip
);
109 if (ip
->i_d
.di_nextents
> 0)
110 (void)xfs_da_reada_buf(NULL
, ip
, 0, XFS_DATA_FORK
);
111 xfs_iunlock(ip
, mode
);
131 vp
= BHV_TO_VNODE(bdp
);
132 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
134 ip
= XFS_BHVTOI(bdp
);
137 if (XFS_FORCED_SHUTDOWN(mp
))
138 return XFS_ERROR(EIO
);
140 if (!(flags
& ATTR_LAZY
))
141 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
143 vap
->va_size
= ip
->i_d
.di_size
;
144 if (vap
->va_mask
== XFS_AT_SIZE
)
148 XFS_FSB_TO_BB(mp
, ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
149 vap
->va_nodeid
= ip
->i_ino
;
151 vap
->va_nodeid
+= mp
->m_inoadd
;
153 vap
->va_nlink
= ip
->i_d
.di_nlink
;
156 * Quick exit for non-stat callers
159 ~(XFS_AT_SIZE
|XFS_AT_FSID
|XFS_AT_NODEID
|
160 XFS_AT_NLINK
|XFS_AT_BLKSIZE
)) == 0)
164 * Copy from in-core inode.
166 vap
->va_type
= vp
->v_type
;
167 vap
->va_mode
= ip
->i_d
.di_mode
& MODEMASK
;
168 vap
->va_uid
= ip
->i_d
.di_uid
;
169 vap
->va_gid
= ip
->i_d
.di_gid
;
170 vap
->va_projid
= ip
->i_d
.di_projid
;
173 * Check vnode type block/char vs. everything else.
174 * Do it with bitmask because that's faster than looking
175 * for multiple values individually.
177 if (((1 << vp
->v_type
) & ((1<<VBLK
) | (1<<VCHR
))) == 0) {
180 if (!(ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
)) {
183 /* Large block sizes confuse various
184 * user space programs, so letting the
185 * stripe size through is not a good
188 vap
->va_blocksize
= mp
->m_swidth
?
190 * If the underlying volume is a stripe, then
191 * return the stripe width in bytes as the
192 * recommended I/O size.
194 (mp
->m_swidth
<< mp
->m_sb
.sb_blocklog
) :
196 * Return the largest of the preferred buffer
197 * sizes since doing small I/Os into larger
198 * buffers causes buffers to be decommissioned.
199 * The value returned is in bytes.
201 (1 << (int)MAX(mp
->m_readio_log
,
207 * Return the largest of the preferred buffer
208 * sizes since doing small I/Os into larger
209 * buffers causes buffers to be decommissioned.
210 * The value returned is in bytes.
212 1 << (int)MAX(mp
->m_readio_log
,
218 * If the file blocks are being allocated from a
219 * realtime partition, then return the inode's
220 * realtime extent size or the realtime volume's
223 vap
->va_blocksize
= ip
->i_d
.di_extsize
?
224 (ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) :
225 (mp
->m_sb
.sb_rextsize
<< mp
->m_sb
.sb_blocklog
);
228 vap
->va_rdev
= ip
->i_df
.if_u2
.if_rdev
;
229 vap
->va_blocksize
= BLKDEV_IOSIZE
;
232 vap
->va_atime
.tv_sec
= ip
->i_d
.di_atime
.t_sec
;
233 vap
->va_atime
.tv_nsec
= ip
->i_d
.di_atime
.t_nsec
;
234 vap
->va_mtime
.tv_sec
= ip
->i_d
.di_mtime
.t_sec
;
235 vap
->va_mtime
.tv_nsec
= ip
->i_d
.di_mtime
.t_nsec
;
236 vap
->va_ctime
.tv_sec
= ip
->i_d
.di_ctime
.t_sec
;
237 vap
->va_ctime
.tv_nsec
= ip
->i_d
.di_ctime
.t_nsec
;
240 * Exit for stat callers. See if any of the rest of the fields
241 * to be filled in are needed.
244 (XFS_AT_XFLAGS
|XFS_AT_EXTSIZE
|XFS_AT_NEXTENTS
|XFS_AT_ANEXTENTS
|
245 XFS_AT_GENCOUNT
|XFS_AT_VCODE
)) == 0)
249 * Convert di_flags to xflags.
251 vap
->va_xflags
= xfs_dic2xflags(&ip
->i_d
, ARCH_NOCONVERT
);
254 * Exit for inode revalidate. See if any of the rest of
255 * the fields to be filled in are needed.
258 (XFS_AT_EXTSIZE
|XFS_AT_NEXTENTS
|XFS_AT_ANEXTENTS
|
259 XFS_AT_GENCOUNT
|XFS_AT_VCODE
)) == 0)
262 vap
->va_extsize
= ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
;
264 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
) ?
265 ip
->i_df
.if_bytes
/ sizeof(xfs_bmbt_rec_t
) :
269 (ip
->i_afp
->if_flags
& XFS_IFEXTENTS
) ?
270 ip
->i_afp
->if_bytes
/ sizeof(xfs_bmbt_rec_t
) :
271 ip
->i_d
.di_anextents
;
273 vap
->va_anextents
= 0;
274 vap
->va_gen
= ip
->i_d
.di_gen
;
277 if (!(flags
& ATTR_LAZY
))
278 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
304 xfs_prid_t projid
=0, iprojid
=0;
305 int mandlock_before
, mandlock_after
;
306 struct xfs_dquot
*udqp
, *gdqp
, *olddquot1
, *olddquot2
;
308 int need_iolock
= (flags
& ATTR_DMI
) == 0;
310 vp
= BHV_TO_VNODE(bdp
);
311 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
313 if (vp
->v_vfsp
->vfs_flag
& VFS_RDONLY
)
314 return XFS_ERROR(EROFS
);
317 * Cannot set certain attributes.
320 if (mask
& XFS_AT_NOSET
) {
321 return XFS_ERROR(EINVAL
);
324 ip
= XFS_BHVTOI(bdp
);
327 if (XFS_FORCED_SHUTDOWN(mp
))
328 return XFS_ERROR(EIO
);
331 * Timestamps do not need to be logged and hence do not
332 * need to be done within a transaction.
334 if (mask
& XFS_AT_UPDTIMES
) {
335 ASSERT((mask
& ~XFS_AT_UPDTIMES
) == 0);
336 timeflags
= ((mask
& XFS_AT_UPDATIME
) ? XFS_ICHGTIME_ACC
: 0) |
337 ((mask
& XFS_AT_UPDCTIME
) ? XFS_ICHGTIME_CHG
: 0) |
338 ((mask
& XFS_AT_UPDMTIME
) ? XFS_ICHGTIME_MOD
: 0);
339 xfs_ichgtime(ip
, timeflags
);
343 olddquot1
= olddquot2
= NULL
;
347 * If disk quotas is on, we make sure that the dquots do exist on disk,
348 * before we start any other transactions. Trying to do this later
349 * is messy. We don't care to take a readlock to look at the ids
350 * in inode here, because we can't hold it across the trans_reserve.
351 * If the IDs do change before we take the ilock, we're covered
352 * because the i_*dquot fields will get updated anyway.
354 if (XFS_IS_QUOTA_ON(mp
) && (mask
& (XFS_AT_UID
|XFS_AT_GID
))) {
357 if (mask
& XFS_AT_UID
) {
359 qflags
|= XFS_QMOPT_UQUOTA
;
361 uid
= ip
->i_d
.di_uid
;
363 if (mask
& XFS_AT_GID
) {
365 qflags
|= XFS_QMOPT_GQUOTA
;
367 gid
= ip
->i_d
.di_gid
;
370 * We take a reference when we initialize udqp and gdqp,
371 * so it is important that we never blindly double trip on
372 * the same variable. See xfs_create() for an example.
374 ASSERT(udqp
== NULL
);
375 ASSERT(gdqp
== NULL
);
376 code
= XFS_QM_DQVOPALLOC(mp
, ip
, uid
,gid
, qflags
, &udqp
, &gdqp
);
382 * For the other attributes, we acquire the inode lock and
383 * first do an error checking pass.
386 lock_flags
= XFS_ILOCK_EXCL
;
387 if (!(mask
& XFS_AT_SIZE
)) {
388 if ((mask
!= (XFS_AT_CTIME
|XFS_AT_ATIME
|XFS_AT_MTIME
)) ||
389 (mp
->m_flags
& XFS_MOUNT_WSYNC
)) {
390 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
392 if ((code
= xfs_trans_reserve(tp
, 0,
393 XFS_ICHANGE_LOG_RES(mp
), 0,
400 if (DM_EVENT_ENABLED (vp
->v_vfsp
, ip
, DM_EVENT_TRUNCATE
) &&
401 !(flags
& ATTR_DMI
)) {
402 int dmflags
= AT_DELAY_FLAG(flags
) | DM_SEM_FLAG_WR
;
403 code
= XFS_SEND_DATA(mp
, DM_EVENT_TRUNCATE
, vp
,
404 vap
->va_size
, 0, dmflags
, NULL
);
411 lock_flags
|= XFS_IOLOCK_EXCL
;
414 xfs_ilock(ip
, lock_flags
);
416 /* boolean: are we the file owner? */
417 file_owner
= (current_fsuid(credp
) == ip
->i_d
.di_uid
);
420 * Change various properties of a file.
421 * Only the owner or users with CAP_FOWNER
422 * capability may do these things.
425 (XFS_AT_MODE
|XFS_AT_XFLAGS
|XFS_AT_EXTSIZE
|XFS_AT_UID
|
426 XFS_AT_GID
|XFS_AT_PROJID
)) {
428 * CAP_FOWNER overrides the following restrictions:
430 * The user ID of the calling process must be equal
431 * to the file owner ID, except in cases where the
432 * CAP_FSETID capability is applicable.
434 if (!file_owner
&& !capable(CAP_FOWNER
)) {
435 code
= XFS_ERROR(EPERM
);
440 * CAP_FSETID overrides the following restrictions:
442 * The effective user ID of the calling process shall match
443 * the file owner when setting the set-user-ID and
444 * set-group-ID bits on that file.
446 * The effective group ID or one of the supplementary group
447 * IDs of the calling process shall match the group owner of
448 * the file when setting the set-group-ID bit on that file
450 if (mask
& XFS_AT_MODE
) {
453 if ((vap
->va_mode
& S_ISUID
) && !file_owner
)
455 if ((vap
->va_mode
& S_ISGID
) &&
456 !in_group_p((gid_t
)ip
->i_d
.di_gid
))
459 /* Linux allows this, Irix doesn't. */
460 if ((vap
->va_mode
& S_ISVTX
) && vp
->v_type
!= VDIR
)
463 if (m
&& !capable(CAP_FSETID
))
469 * Change file ownership. Must be the owner or privileged.
470 * If the system was configured with the "restricted_chown"
471 * option, the owner is not permitted to give away the file,
472 * and can change the group id only to a group of which he
473 * or she is a member.
475 if (mask
& (XFS_AT_UID
|XFS_AT_GID
|XFS_AT_PROJID
)) {
477 * These IDs could have changed since we last looked at them.
478 * But, we're assured that if the ownership did change
479 * while we didn't have the inode locked, inode's dquot(s)
480 * would have changed also.
482 iuid
= ip
->i_d
.di_uid
;
483 iprojid
= ip
->i_d
.di_projid
;
484 igid
= ip
->i_d
.di_gid
;
485 gid
= (mask
& XFS_AT_GID
) ? vap
->va_gid
: igid
;
486 uid
= (mask
& XFS_AT_UID
) ? vap
->va_uid
: iuid
;
487 projid
= (mask
& XFS_AT_PROJID
) ? (xfs_prid_t
)vap
->va_projid
:
491 * CAP_CHOWN overrides the following restrictions:
493 * If _POSIX_CHOWN_RESTRICTED is defined, this capability
494 * shall override the restriction that a process cannot
495 * change the user ID of a file it owns and the restriction
496 * that the group ID supplied to the chown() function
497 * shall be equal to either the group ID or one of the
498 * supplementary group IDs of the calling process.
500 * XXX: How does restricted_chown affect projid?
502 if (restricted_chown
&&
503 (iuid
!= uid
|| (igid
!= gid
&&
504 !in_group_p((gid_t
)gid
))) &&
505 !capable(CAP_CHOWN
)) {
506 code
= XFS_ERROR(EPERM
);
510 * Do a quota reservation only if uid or gid is actually
513 if ((XFS_IS_UQUOTA_ON(mp
) && iuid
!= uid
) ||
514 (XFS_IS_GQUOTA_ON(mp
) && igid
!= gid
)) {
516 code
= XFS_QM_DQVOPCHOWNRESV(mp
, tp
, ip
, udqp
, gdqp
,
517 capable(CAP_FOWNER
) ?
518 XFS_QMOPT_FORCE_RES
: 0);
519 if (code
) /* out of quota */
525 * Truncate file. Must have write permission and not be a directory.
527 if (mask
& XFS_AT_SIZE
) {
528 /* Short circuit the truncate case for zero length files */
529 if ((vap
->va_size
== 0) &&
530 (ip
->i_d
.di_size
== 0) && (ip
->i_d
.di_nextents
== 0)) {
531 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
532 lock_flags
&= ~XFS_ILOCK_EXCL
;
533 if (mask
& XFS_AT_CTIME
)
534 xfs_ichgtime(ip
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
539 if (vp
->v_type
== VDIR
) {
540 code
= XFS_ERROR(EISDIR
);
542 } else if (vp
->v_type
!= VREG
) {
543 code
= XFS_ERROR(EINVAL
);
547 * Make sure that the dquots are attached to the inode.
549 if ((code
= XFS_QM_DQATTACH(mp
, ip
, XFS_QMOPT_ILOCKED
)))
554 * Change file access or modified times.
556 if (mask
& (XFS_AT_ATIME
|XFS_AT_MTIME
)) {
558 if ((flags
& ATTR_UTIME
) &&
559 !capable(CAP_FOWNER
)) {
560 code
= XFS_ERROR(EPERM
);
567 * Change extent size or realtime flag.
569 if (mask
& (XFS_AT_EXTSIZE
|XFS_AT_XFLAGS
)) {
571 * Can't change extent size if any extents are allocated.
573 if ((ip
->i_d
.di_nextents
|| ip
->i_delayed_blks
) &&
574 (mask
& XFS_AT_EXTSIZE
) &&
575 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
577 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
582 * Can't set extent size unless the file is marked, or
583 * about to be marked as a realtime file.
585 * This check will be removed when fixed size extents
586 * with buffered data writes is implemented.
589 if ((mask
& XFS_AT_EXTSIZE
) &&
590 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
592 (!((ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
) ||
593 ((mask
& XFS_AT_XFLAGS
) &&
594 (vap
->va_xflags
& XFS_XFLAG_REALTIME
))))) {
595 code
= XFS_ERROR(EINVAL
);
600 * Can't change realtime flag if any extents are allocated.
602 if (ip
->i_d
.di_nextents
&& (mask
& XFS_AT_XFLAGS
) &&
603 (ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
) !=
604 (vap
->va_xflags
& XFS_XFLAG_REALTIME
)) {
605 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
609 * Extent size must be a multiple of the appropriate block
610 * size, if set at all.
612 if ((mask
& XFS_AT_EXTSIZE
) && vap
->va_extsize
!= 0) {
615 if ((ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
) ||
616 ((mask
& XFS_AT_XFLAGS
) &&
617 (vap
->va_xflags
& XFS_XFLAG_REALTIME
))) {
618 size
= mp
->m_sb
.sb_rextsize
<<
619 mp
->m_sb
.sb_blocklog
;
621 size
= mp
->m_sb
.sb_blocksize
;
623 if (vap
->va_extsize
% size
) {
624 code
= XFS_ERROR(EINVAL
);
629 * If realtime flag is set then must have realtime data.
631 if ((mask
& XFS_AT_XFLAGS
) &&
632 (vap
->va_xflags
& XFS_XFLAG_REALTIME
)) {
633 if ((mp
->m_sb
.sb_rblocks
== 0) ||
634 (mp
->m_sb
.sb_rextsize
== 0) ||
635 (ip
->i_d
.di_extsize
% mp
->m_sb
.sb_rextsize
)) {
636 code
= XFS_ERROR(EINVAL
);
642 * Can't modify an immutable/append-only file unless
643 * we have appropriate permission.
645 if ((mask
& XFS_AT_XFLAGS
) &&
647 (XFS_DIFLAG_IMMUTABLE
|XFS_DIFLAG_APPEND
) ||
649 (XFS_XFLAG_IMMUTABLE
| XFS_XFLAG_APPEND
))) &&
650 !capable(CAP_LINUX_IMMUTABLE
)) {
651 code
= XFS_ERROR(EPERM
);
657 * Now we can make the changes. Before we join the inode
658 * to the transaction, if XFS_AT_SIZE is set then take care of
659 * the part of the truncation that must be done without the
660 * inode lock. This needs to be done before joining the inode
661 * to the transaction, because the inode cannot be unlocked
662 * once it is a part of the transaction.
664 if (mask
& XFS_AT_SIZE
) {
666 if (vap
->va_size
> ip
->i_d
.di_size
)
667 code
= xfs_igrow_start(ip
, vap
->va_size
, credp
);
668 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
670 code
= xfs_itruncate_data(ip
, vap
->va_size
);
673 lock_flags
&= ~XFS_ILOCK_EXCL
;
674 ASSERT(lock_flags
== XFS_IOLOCK_EXCL
);
677 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_SIZE
);
678 if ((code
= xfs_trans_reserve(tp
, 0,
679 XFS_ITRUNCATE_LOG_RES(mp
), 0,
680 XFS_TRANS_PERM_LOG_RES
,
681 XFS_ITRUNCATE_LOG_COUNT
))) {
682 xfs_trans_cancel(tp
, 0);
684 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
687 commit_flags
= XFS_TRANS_RELEASE_LOG_RES
;
688 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
692 xfs_trans_ijoin(tp
, ip
, lock_flags
);
693 xfs_trans_ihold(tp
, ip
);
696 /* determine whether mandatory locking mode changes */
697 mandlock_before
= MANDLOCK(vp
, ip
->i_d
.di_mode
);
700 * Truncate file. Must have write permission and not be a directory.
702 if (mask
& XFS_AT_SIZE
) {
703 if (vap
->va_size
> ip
->i_d
.di_size
) {
704 xfs_igrow_finish(tp
, ip
, vap
->va_size
,
705 !(flags
& ATTR_DMI
));
706 } else if ((vap
->va_size
<= ip
->i_d
.di_size
) ||
707 ((vap
->va_size
== 0) && ip
->i_d
.di_nextents
)) {
709 * signal a sync transaction unless
710 * we're truncating an already unlinked
711 * file on a wsync filesystem
713 code
= xfs_itruncate_finish(&tp
, ip
,
714 (xfs_fsize_t
)vap
->va_size
,
716 ((ip
->i_d
.di_nlink
!= 0 ||
717 !(mp
->m_flags
& XFS_MOUNT_WSYNC
))
724 * Have to do this even if the file's size doesn't change.
726 timeflags
|= XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
;
730 * Change file access modes.
732 if (mask
& XFS_AT_MODE
) {
733 ip
->i_d
.di_mode
&= S_IFMT
;
734 ip
->i_d
.di_mode
|= vap
->va_mode
& ~S_IFMT
;
736 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
737 timeflags
|= XFS_ICHGTIME_CHG
;
741 * Change file ownership. Must be the owner or privileged.
742 * If the system was configured with the "restricted_chown"
743 * option, the owner is not permitted to give away the file,
744 * and can change the group id only to a group of which he
745 * or she is a member.
747 if (mask
& (XFS_AT_UID
|XFS_AT_GID
|XFS_AT_PROJID
)) {
749 * CAP_FSETID overrides the following restrictions:
751 * The set-user-ID and set-group-ID bits of a file will be
752 * cleared upon successful return from chown()
754 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
755 !capable(CAP_FSETID
)) {
756 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
760 * Change the ownerships and register quota modifications
761 * in the transaction.
764 if (XFS_IS_UQUOTA_ON(mp
)) {
765 ASSERT(mask
& XFS_AT_UID
);
767 olddquot1
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
768 &ip
->i_udquot
, udqp
);
770 ip
->i_d
.di_uid
= uid
;
773 if (XFS_IS_GQUOTA_ON(mp
)) {
774 ASSERT(mask
& XFS_AT_GID
);
776 olddquot2
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
777 &ip
->i_gdquot
, gdqp
);
779 ip
->i_d
.di_gid
= gid
;
781 if (iprojid
!= projid
) {
782 ip
->i_d
.di_projid
= projid
;
784 * We may have to rev the inode as well as
785 * the superblock version number since projids didn't
786 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
788 if (ip
->i_d
.di_version
== XFS_DINODE_VERSION_1
)
789 xfs_bump_ino_vers2(tp
, ip
);
792 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
793 timeflags
|= XFS_ICHGTIME_CHG
;
798 * Change file access or modified times.
800 if (mask
& (XFS_AT_ATIME
|XFS_AT_MTIME
)) {
801 if (mask
& XFS_AT_ATIME
) {
802 ip
->i_d
.di_atime
.t_sec
= vap
->va_atime
.tv_sec
;
803 ip
->i_d
.di_atime
.t_nsec
= vap
->va_atime
.tv_nsec
;
804 ip
->i_update_core
= 1;
805 timeflags
&= ~XFS_ICHGTIME_ACC
;
807 if (mask
& XFS_AT_MTIME
) {
808 ip
->i_d
.di_mtime
.t_sec
= vap
->va_mtime
.tv_sec
;
809 ip
->i_d
.di_mtime
.t_nsec
= vap
->va_mtime
.tv_nsec
;
810 timeflags
&= ~XFS_ICHGTIME_MOD
;
811 timeflags
|= XFS_ICHGTIME_CHG
;
813 if (tp
&& (flags
& ATTR_UTIME
))
814 xfs_trans_log_inode (tp
, ip
, XFS_ILOG_CORE
);
818 * Change XFS-added attributes.
820 if (mask
& (XFS_AT_EXTSIZE
|XFS_AT_XFLAGS
)) {
821 if (mask
& XFS_AT_EXTSIZE
) {
823 * Converting bytes to fs blocks.
825 ip
->i_d
.di_extsize
= vap
->va_extsize
>>
826 mp
->m_sb
.sb_blocklog
;
828 if (mask
& XFS_AT_XFLAGS
) {
831 /* can't set PREALLOC this way, just preserve it */
832 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
833 if (vap
->va_xflags
& XFS_XFLAG_IMMUTABLE
)
834 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
835 if (vap
->va_xflags
& XFS_XFLAG_APPEND
)
836 di_flags
|= XFS_DIFLAG_APPEND
;
837 if (vap
->va_xflags
& XFS_XFLAG_SYNC
)
838 di_flags
|= XFS_DIFLAG_SYNC
;
839 if (vap
->va_xflags
& XFS_XFLAG_NOATIME
)
840 di_flags
|= XFS_DIFLAG_NOATIME
;
841 if (vap
->va_xflags
& XFS_XFLAG_NODUMP
)
842 di_flags
|= XFS_DIFLAG_NODUMP
;
843 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFDIR
) {
844 if (vap
->va_xflags
& XFS_XFLAG_RTINHERIT
)
845 di_flags
|= XFS_DIFLAG_RTINHERIT
;
846 if (vap
->va_xflags
& XFS_XFLAG_NOSYMLINKS
)
847 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
849 if (vap
->va_xflags
& XFS_XFLAG_REALTIME
) {
850 di_flags
|= XFS_DIFLAG_REALTIME
;
851 ip
->i_iocore
.io_flags
|= XFS_IOCORE_RT
;
853 ip
->i_iocore
.io_flags
&= ~XFS_IOCORE_RT
;
856 ip
->i_d
.di_flags
= di_flags
;
858 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
859 timeflags
|= XFS_ICHGTIME_CHG
;
863 * Change file inode change time only if XFS_AT_CTIME set
864 * AND we have been called by a DMI function.
867 if ( (flags
& ATTR_DMI
) && (mask
& XFS_AT_CTIME
) ) {
868 ip
->i_d
.di_ctime
.t_sec
= vap
->va_ctime
.tv_sec
;
869 ip
->i_d
.di_ctime
.t_nsec
= vap
->va_ctime
.tv_nsec
;
870 ip
->i_update_core
= 1;
871 timeflags
&= ~XFS_ICHGTIME_CHG
;
875 * Send out timestamp changes that need to be set to the
876 * current time. Not done when called by a DMI function.
878 if (timeflags
&& !(flags
& ATTR_DMI
))
879 xfs_ichgtime(ip
, timeflags
);
881 XFS_STATS_INC(xs_ig_attrchg
);
884 * If this is a synchronous mount, make sure that the
885 * transaction goes to disk before returning to the user.
886 * This is slightly sub-optimal in that truncates require
887 * two sync transactions instead of one for wsync filesytems.
888 * One for the truncate and one for the timestamps since we
889 * don't want to change the timestamps unless we're sure the
890 * truncate worked. Truncates are less than 1% of the laddis
891 * mix so this probably isn't worth the trouble to optimize.
895 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
896 xfs_trans_set_sync(tp
);
898 code
= xfs_trans_commit(tp
, commit_flags
, NULL
);
902 * If the (regular) file's mandatory locking mode changed, then
903 * notify the vnode. We do this under the inode lock to prevent
904 * racing calls to vop_vnode_change.
906 mandlock_after
= MANDLOCK(vp
, ip
->i_d
.di_mode
);
907 if (mandlock_before
!= mandlock_after
) {
908 VOP_VNODE_CHANGE(vp
, VCHANGE_FLAGS_ENF_LOCKING
,
912 xfs_iunlock(ip
, lock_flags
);
915 * Release any dquot(s) the inode had kept before chown.
917 XFS_QM_DQRELE(mp
, olddquot1
);
918 XFS_QM_DQRELE(mp
, olddquot2
);
919 XFS_QM_DQRELE(mp
, udqp
);
920 XFS_QM_DQRELE(mp
, gdqp
);
926 if (DM_EVENT_ENABLED(vp
->v_vfsp
, ip
, DM_EVENT_ATTRIBUTE
) &&
927 !(flags
& ATTR_DMI
)) {
928 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, vp
, DM_RIGHT_NULL
,
929 NULL
, DM_RIGHT_NULL
, NULL
, NULL
,
930 0, 0, AT_DELAY_FLAG(flags
));
935 commit_flags
|= XFS_TRANS_ABORT
;
938 XFS_QM_DQRELE(mp
, udqp
);
939 XFS_QM_DQRELE(mp
, gdqp
);
941 xfs_trans_cancel(tp
, commit_flags
);
943 if (lock_flags
!= 0) {
944 xfs_iunlock(ip
, lock_flags
);
952 * Null conversion from vnode mode bits to inode mode bits, as in efs.
963 vn_trace_entry(BHV_TO_VNODE(bdp
), __FUNCTION__
,
964 (inst_t
*)__return_address
);
966 ip
= XFS_BHVTOI(bdp
);
967 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
968 error
= xfs_iaccess(ip
, mode
, credp
);
969 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
993 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
999 vp
= BHV_TO_VNODE(bdp
);
1000 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1002 ip
= XFS_BHVTOI(bdp
);
1005 if (XFS_FORCED_SHUTDOWN(mp
))
1006 return XFS_ERROR(EIO
);
1008 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1010 ASSERT((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
);
1012 offset
= uiop
->uio_offset
;
1013 count
= uiop
->uio_resid
;
1016 error
= XFS_ERROR(EINVAL
);
1024 if (!(ioflags
& IO_INVIS
)) {
1025 xfs_ichgtime(ip
, XFS_ICHGTIME_ACC
);
1029 * See if the symlink is stored inline.
1031 pathlen
= (int)ip
->i_d
.di_size
;
1033 if (ip
->i_df
.if_flags
& XFS_IFINLINE
) {
1034 error
= uio_read(ip
->i_df
.if_u1
.if_data
, pathlen
, uiop
);
1038 * Symlink not inline. Call bmap to get it in.
1040 nmaps
= SYMLINK_MAPS
;
1042 error
= xfs_bmapi(NULL
, ip
, 0, XFS_B_TO_FSB(mp
, pathlen
),
1043 0, NULL
, 0, mval
, &nmaps
, NULL
);
1049 for (n
= 0; n
< nmaps
; n
++) {
1050 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
1051 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
1052 bp
= xfs_buf_read(mp
->m_ddev_targp
, d
,
1053 BTOBB(byte_cnt
), 0);
1054 error
= XFS_BUF_GETERROR(bp
);
1056 xfs_ioerror_alert("xfs_readlink",
1057 ip
->i_mount
, bp
, XFS_BUF_ADDR(bp
));
1061 if (pathlen
< byte_cnt
)
1063 pathlen
-= byte_cnt
;
1065 error
= uio_read(XFS_BUF_PTR(bp
), byte_cnt
, uiop
);
1074 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1083 * This is called to sync the inode and its data out to disk.
1084 * We need to hold the I/O lock while flushing the data, and
1085 * the inode lock while flushing the inode. The inode lock CANNOT
1086 * be held while flushing the data, so acquire after we're done
1101 vn_trace_entry(BHV_TO_VNODE(bdp
),
1102 __FUNCTION__
, (inst_t
*)__return_address
);
1104 ip
= XFS_BHVTOI(bdp
);
1106 ASSERT(start
>= 0 && stop
>= -1);
1108 if (XFS_FORCED_SHUTDOWN(ip
->i_mount
))
1109 return XFS_ERROR(EIO
);
1112 * We always need to make sure that the required inode state
1113 * is safe on disk. The vnode might be clean but because
1114 * of committed transactions that haven't hit the disk yet.
1115 * Likewise, there could be unflushed non-transactional
1116 * changes to the inode core that have to go to disk.
1118 * The following code depends on one assumption: that
1119 * any transaction that changes an inode logs the core
1120 * because it has to change some field in the inode core
1121 * (typically nextents or nblocks). That assumption
1122 * implies that any transactions against an inode will
1123 * catch any non-transactional updates. If inode-altering
1124 * transactions exist that violate this assumption, the
1125 * code breaks. Right now, it figures that if the involved
1126 * update_* field is clear and the inode is unpinned, the
1127 * inode is clean. Either it's been flushed or it's been
1128 * committed and the commit has hit the disk unpinning the inode.
1129 * (Note that xfs_inode_item_format() called at commit clears
1130 * the update_* fields.)
1132 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1134 /* If we are flushing data then we care about update_size
1135 * being set, otherwise we care about update_core
1137 if ((flag
& FSYNC_DATA
) ?
1138 (ip
->i_update_size
== 0) :
1139 (ip
->i_update_core
== 0)) {
1141 * Timestamps/size haven't changed since last inode
1142 * flush or inode transaction commit. That means
1143 * either nothing got written or a transaction
1144 * committed which caught the updates. If the
1145 * latter happened and the transaction hasn't
1146 * hit the disk yet, the inode will be still
1147 * be pinned. If it is, force the log.
1150 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1152 if (xfs_ipincount(ip
)) {
1153 xfs_log_force(ip
->i_mount
, (xfs_lsn_t
)0,
1155 ((flag
& FSYNC_WAIT
)
1156 ? XFS_LOG_SYNC
: 0));
1161 * Kick off a transaction to log the inode
1162 * core to get the updates. Make it
1163 * sync if FSYNC_WAIT is passed in (which
1164 * is done by everybody but specfs). The
1165 * sync transaction will also force the log.
1167 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1168 tp
= xfs_trans_alloc(ip
->i_mount
, XFS_TRANS_FSYNC_TS
);
1169 if ((error
= xfs_trans_reserve(tp
, 0,
1170 XFS_FSYNC_TS_LOG_RES(ip
->i_mount
),
1172 xfs_trans_cancel(tp
, 0);
1175 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1178 * Note - it's possible that we might have pushed
1179 * ourselves out of the way during trans_reserve
1180 * which would flush the inode. But there's no
1181 * guarantee that the inode buffer has actually
1182 * gone out yet (it's delwri). Plus the buffer
1183 * could be pinned anyway if it's part of an
1184 * inode in another recent transaction. So we
1185 * play it safe and fire off the transaction anyway.
1187 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
1188 xfs_trans_ihold(tp
, ip
);
1189 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1190 if (flag
& FSYNC_WAIT
)
1191 xfs_trans_set_sync(tp
);
1192 error
= xfs_trans_commit(tp
, 0, NULL
);
1194 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1200 * This is called by xfs_inactive to free any blocks beyond eof,
1201 * when the link count isn't zero.
1204 xfs_inactive_free_eofblocks(
1210 xfs_fileoff_t end_fsb
;
1211 xfs_fileoff_t last_fsb
;
1212 xfs_filblks_t map_len
;
1214 xfs_bmbt_irec_t imap
;
1217 * Figure out if there are any blocks beyond the end
1218 * of the file. If not, then there is nothing to do.
1220 end_fsb
= XFS_B_TO_FSB(mp
, ((xfs_ufsize_t
)ip
->i_d
.di_size
));
1221 last_fsb
= XFS_B_TO_FSB(mp
, (xfs_ufsize_t
)XFS_MAXIOFFSET(mp
));
1222 map_len
= last_fsb
- end_fsb
;
1227 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
1228 error
= xfs_bmapi(NULL
, ip
, end_fsb
, map_len
, 0,
1229 NULL
, 0, &imap
, &nimaps
, NULL
);
1230 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
1232 if (!error
&& (nimaps
!= 0) &&
1233 (imap
.br_startblock
!= HOLESTARTBLOCK
)) {
1235 * Attach the dquots to the inode up front.
1237 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
1241 * There are blocks after the end of file.
1242 * Free them up now by truncating the file to
1245 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1248 * Do the xfs_itruncate_start() call before
1249 * reserving any log space because
1250 * itruncate_start will call into the buffer
1251 * cache and we can't
1252 * do that within a transaction.
1254 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
1255 xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
,
1258 error
= xfs_trans_reserve(tp
, 0,
1259 XFS_ITRUNCATE_LOG_RES(mp
),
1260 0, XFS_TRANS_PERM_LOG_RES
,
1261 XFS_ITRUNCATE_LOG_COUNT
);
1263 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1264 xfs_trans_cancel(tp
, 0);
1265 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1269 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1270 xfs_trans_ijoin(tp
, ip
,
1273 xfs_trans_ihold(tp
, ip
);
1275 error
= xfs_itruncate_finish(&tp
, ip
,
1280 * If we get an error at this point we
1281 * simply don't bother truncating the file.
1284 xfs_trans_cancel(tp
,
1285 (XFS_TRANS_RELEASE_LOG_RES
|
1288 error
= xfs_trans_commit(tp
,
1289 XFS_TRANS_RELEASE_LOG_RES
,
1292 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1298 * Free a symlink that has blocks associated with it.
1301 xfs_inactive_symlink_rmt(
1309 xfs_fsblock_t first_block
;
1310 xfs_bmap_free_t free_list
;
1313 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
1321 ASSERT(ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
));
1323 * We're freeing a symlink that has some
1324 * blocks allocated to it. Free the
1325 * blocks here. We know that we've got
1326 * either 1 or 2 extents and that we can
1327 * free them all in one bunmapi call.
1329 ASSERT(ip
->i_d
.di_nextents
> 0 && ip
->i_d
.di_nextents
<= 2);
1330 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
1331 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
1332 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1333 xfs_trans_cancel(tp
, 0);
1338 * Lock the inode, fix the size, and join it to the transaction.
1339 * Hold it so in the normal path, we still have it locked for
1340 * the second transaction. In the error paths we need it
1341 * held so the cancel won't rele it, see below.
1343 xfs_ilock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1344 size
= (int)ip
->i_d
.di_size
;
1345 ip
->i_d
.di_size
= 0;
1346 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1347 xfs_trans_ihold(tp
, ip
);
1348 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1350 * Find the block(s) so we can inval and unmap them.
1353 XFS_BMAP_INIT(&free_list
, &first_block
);
1354 nmaps
= sizeof(mval
) / sizeof(mval
[0]);
1355 if ((error
= xfs_bmapi(tp
, ip
, 0, XFS_B_TO_FSB(mp
, size
),
1356 XFS_BMAPI_METADATA
, &first_block
, 0, mval
, &nmaps
,
1360 * Invalidate the block(s).
1362 for (i
= 0; i
< nmaps
; i
++) {
1363 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
,
1364 XFS_FSB_TO_DADDR(mp
, mval
[i
].br_startblock
),
1365 XFS_FSB_TO_BB(mp
, mval
[i
].br_blockcount
), 0);
1366 xfs_trans_binval(tp
, bp
);
1369 * Unmap the dead block(s) to the free_list.
1371 if ((error
= xfs_bunmapi(tp
, ip
, 0, size
, XFS_BMAPI_METADATA
, nmaps
,
1372 &first_block
, &free_list
, &done
)))
1376 * Commit the first transaction. This logs the EFI and the inode.
1378 if ((error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
)))
1381 * The transaction must have been committed, since there were
1382 * actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
1383 * The new tp has the extent freeing and EFDs.
1387 * The first xact was committed, so add the inode to the new one.
1388 * Mark it dirty so it will be logged and moved forward in the log as
1389 * part of every commit.
1391 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1392 xfs_trans_ihold(tp
, ip
);
1393 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1395 * Get a new, empty transaction to return to our caller.
1397 ntp
= xfs_trans_dup(tp
);
1399 * Commit the transaction containing extent freeing and EFD's.
1400 * If we get an error on the commit here or on the reserve below,
1401 * we need to unlock the inode since the new transaction doesn't
1402 * have the inode attached.
1404 error
= xfs_trans_commit(tp
, 0, NULL
);
1407 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1411 * Remove the memory for extent descriptions (just bookkeeping).
1413 if (ip
->i_df
.if_bytes
)
1414 xfs_idata_realloc(ip
, -ip
->i_df
.if_bytes
, XFS_DATA_FORK
);
1415 ASSERT(ip
->i_df
.if_bytes
== 0);
1417 * Put an itruncate log reservation in the new transaction
1420 if ((error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
1421 XFS_TRANS_PERM_LOG_RES
, XFS_ITRUNCATE_LOG_COUNT
))) {
1422 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1426 * Return with the inode locked but not joined to the transaction.
1432 xfs_bmap_cancel(&free_list
);
1435 * Have to come here with the inode locked and either
1436 * (held and in the transaction) or (not in the transaction).
1437 * If the inode isn't held then cancel would iput it, but
1438 * that's wrong since this is inactive and the vnode ref
1439 * count is 0 already.
1440 * Cancel won't do anything to the inode if held, but it still
1441 * needs to be locked until the cancel is done, if it was
1442 * joined to the transaction.
1444 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1445 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1452 xfs_inactive_symlink_local(
1458 ASSERT(ip
->i_d
.di_size
<= XFS_IFORK_DSIZE(ip
));
1460 * We're freeing a symlink which fit into
1461 * the inode. Just free the memory used
1462 * to hold the old symlink.
1464 error
= xfs_trans_reserve(*tpp
, 0,
1465 XFS_ITRUNCATE_LOG_RES(ip
->i_mount
),
1466 0, XFS_TRANS_PERM_LOG_RES
,
1467 XFS_ITRUNCATE_LOG_COUNT
);
1470 xfs_trans_cancel(*tpp
, 0);
1474 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1477 * Zero length symlinks _can_ exist.
1479 if (ip
->i_df
.if_bytes
> 0) {
1480 xfs_idata_realloc(ip
,
1481 -(ip
->i_df
.if_bytes
),
1483 ASSERT(ip
->i_df
.if_bytes
== 0);
1500 ASSERT(ismrlocked(&ip
->i_iolock
, MR_UPDATE
));
1503 ASSERT(ip
->i_d
.di_forkoff
!= 0);
1504 xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
1505 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
1507 error
= xfs_attr_inactive(ip
);
1510 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1511 return (error
); /* goto out*/
1514 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1515 error
= xfs_trans_reserve(tp
, 0,
1516 XFS_IFREE_LOG_RES(mp
),
1517 0, XFS_TRANS_PERM_LOG_RES
,
1518 XFS_INACTIVE_LOG_COUNT
);
1520 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1521 xfs_trans_cancel(tp
, 0);
1523 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1527 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1528 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1529 xfs_trans_ihold(tp
, ip
);
1530 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1532 ASSERT(ip
->i_d
.di_anextents
== 0);
1547 vp
= BHV_TO_VNODE(bdp
);
1548 ip
= XFS_BHVTOI(bdp
);
1550 if ((vp
->v_type
!= VREG
) || (ip
->i_d
.di_mode
== 0)) {
1554 /* If this is a read-only mount, don't do this (would generate I/O) */
1555 if (vp
->v_vfsp
->vfs_flag
& VFS_RDONLY
)
1558 #ifdef HAVE_REFCACHE
1559 /* If we are in the NFS reference cache then don't do this now */
1566 if (ip
->i_d
.di_nlink
!= 0) {
1567 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1568 ((ip
->i_d
.di_size
> 0) || (VN_CACHED(vp
) > 0)) &&
1569 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)) &&
1570 (!(ip
->i_d
.di_flags
& (XFS_DIFLAG_PREALLOC
|XFS_DIFLAG_APPEND
)))) {
1571 if ((error
= xfs_inactive_free_eofblocks(mp
, ip
)))
1573 /* Update linux inode block count after free above */
1574 LINVFS_GET_IP(vp
)->i_blocks
= XFS_FSB_TO_BB(mp
,
1575 ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
1585 * This is called when the vnode reference count for the vnode
1586 * goes to zero. If the file has been unlinked, then it must
1587 * now be truncated. Also, we clear all of the read-ahead state
1588 * kept for the inode here since the file is now closed.
1597 xfs_bmap_free_t free_list
;
1598 xfs_fsblock_t first_block
;
1605 vp
= BHV_TO_VNODE(bdp
);
1606 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1608 ip
= XFS_BHVTOI(bdp
);
1611 * If the inode is already free, then there can be nothing
1614 if (ip
->i_d
.di_mode
== 0 || VN_BAD(vp
)) {
1615 ASSERT(ip
->i_df
.if_real_bytes
== 0);
1616 ASSERT(ip
->i_df
.if_broot_bytes
== 0);
1617 return VN_INACTIVE_CACHE
;
1621 * Only do a truncate if it's a regular file with
1622 * some actual space in it. It's OK to look at the
1623 * inode's fields without the lock because we're the
1624 * only one with a reference to the inode.
1626 truncate
= ((ip
->i_d
.di_nlink
== 0) &&
1627 ((ip
->i_d
.di_size
!= 0) || (ip
->i_d
.di_nextents
> 0)) &&
1628 ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
));
1632 if (ip
->i_d
.di_nlink
== 0 &&
1633 DM_EVENT_ENABLED(vp
->v_vfsp
, ip
, DM_EVENT_DESTROY
)) {
1634 (void) XFS_SEND_DESTROY(mp
, vp
, DM_RIGHT_NULL
);
1639 /* If this is a read-only mount, don't do this (would generate I/O) */
1640 if (vp
->v_vfsp
->vfs_flag
& VFS_RDONLY
)
1643 if (ip
->i_d
.di_nlink
!= 0) {
1644 if ((((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) &&
1645 ((ip
->i_d
.di_size
> 0) || (VN_CACHED(vp
) > 0)) &&
1646 (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)) &&
1647 (!(ip
->i_d
.di_flags
& (XFS_DIFLAG_PREALLOC
|XFS_DIFLAG_APPEND
)) ||
1648 (ip
->i_delayed_blks
!= 0))) {
1649 if ((error
= xfs_inactive_free_eofblocks(mp
, ip
)))
1650 return (VN_INACTIVE_CACHE
);
1651 /* Update linux inode block count after free above */
1652 LINVFS_GET_IP(vp
)->i_blocks
= XFS_FSB_TO_BB(mp
,
1653 ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
1658 ASSERT(ip
->i_d
.di_nlink
== 0);
1660 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
1661 return (VN_INACTIVE_CACHE
);
1663 tp
= xfs_trans_alloc(mp
, XFS_TRANS_INACTIVE
);
1666 * Do the xfs_itruncate_start() call before
1667 * reserving any log space because itruncate_start
1668 * will call into the buffer cache and we can't
1669 * do that within a transaction.
1671 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
1673 xfs_itruncate_start(ip
, XFS_ITRUNC_DEFINITE
, 0);
1675 error
= xfs_trans_reserve(tp
, 0,
1676 XFS_ITRUNCATE_LOG_RES(mp
),
1677 0, XFS_TRANS_PERM_LOG_RES
,
1678 XFS_ITRUNCATE_LOG_COUNT
);
1680 /* Don't call itruncate_cleanup */
1681 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1682 xfs_trans_cancel(tp
, 0);
1683 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
1684 return (VN_INACTIVE_CACHE
);
1687 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
1688 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1689 xfs_trans_ihold(tp
, ip
);
1692 * normally, we have to run xfs_itruncate_finish sync.
1693 * But if filesystem is wsync and we're in the inactive
1694 * path, then we know that nlink == 0, and that the
1695 * xaction that made nlink == 0 is permanently committed
1696 * since xfs_remove runs as a synchronous transaction.
1698 error
= xfs_itruncate_finish(&tp
, ip
, 0, XFS_DATA_FORK
,
1699 (!(mp
->m_flags
& XFS_MOUNT_WSYNC
) ? 1 : 0));
1702 xfs_trans_cancel(tp
,
1703 XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
1704 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1705 return (VN_INACTIVE_CACHE
);
1707 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFLNK
) {
1710 * If we get an error while cleaning up a
1711 * symlink we bail out.
1713 error
= (ip
->i_d
.di_size
> XFS_IFORK_DSIZE(ip
)) ?
1714 xfs_inactive_symlink_rmt(ip
, &tp
) :
1715 xfs_inactive_symlink_local(ip
, &tp
);
1719 return (VN_INACTIVE_CACHE
);
1722 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1723 xfs_trans_ihold(tp
, ip
);
1725 error
= xfs_trans_reserve(tp
, 0,
1726 XFS_IFREE_LOG_RES(mp
),
1727 0, XFS_TRANS_PERM_LOG_RES
,
1728 XFS_INACTIVE_LOG_COUNT
);
1730 ASSERT(XFS_FORCED_SHUTDOWN(mp
));
1731 xfs_trans_cancel(tp
, 0);
1732 return (VN_INACTIVE_CACHE
);
1735 xfs_ilock(ip
, XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
);
1736 xfs_trans_ijoin(tp
, ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1737 xfs_trans_ihold(tp
, ip
);
1741 * If there are attributes associated with the file
1742 * then blow them away now. The code calls a routine
1743 * that recursively deconstructs the attribute fork.
1744 * We need to just commit the current transaction
1745 * because we can't use it for xfs_attr_inactive().
1747 if (ip
->i_d
.di_anextents
> 0) {
1748 error
= xfs_inactive_attrs(ip
, &tp
);
1750 * If we got an error, the transaction is already
1751 * cancelled, and the inode is unlocked. Just get out.
1754 return (VN_INACTIVE_CACHE
);
1755 } else if (ip
->i_afp
) {
1756 xfs_idestroy_fork(ip
, XFS_ATTR_FORK
);
1762 XFS_BMAP_INIT(&free_list
, &first_block
);
1763 error
= xfs_ifree(tp
, ip
, &free_list
);
1766 * If we fail to free the inode, shut down. The cancel
1767 * might do that, we need to make sure. Otherwise the
1768 * inode might be lost for a long time or forever.
1770 if (!XFS_FORCED_SHUTDOWN(mp
)) {
1772 "xfs_inactive: xfs_ifree() returned an error = %d on %s",
1773 error
, mp
->m_fsname
);
1774 xfs_force_shutdown(mp
, XFS_METADATA_IO_ERROR
);
1776 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
|XFS_TRANS_ABORT
);
1779 * Credit the quota account(s). The inode is gone.
1781 XFS_TRANS_MOD_DQUOT_BYINO(mp
, tp
, ip
, XFS_TRANS_DQ_ICOUNT
, -1);
1784 * Just ignore errors at this point. There is
1785 * nothing we can do except to try to keep going.
1787 (void) xfs_bmap_finish(&tp
, &free_list
, first_block
,
1789 (void) xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
1792 * Release the dquots held by inode, if any.
1794 XFS_QM_DQDETACH(mp
, ip
);
1796 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
| XFS_ILOCK_EXCL
);
1799 return VN_INACTIVE_CACHE
;
1808 bhv_desc_t
*dir_bdp
,
1815 xfs_inode_t
*dp
, *ip
;
1821 dir_vp
= BHV_TO_VNODE(dir_bdp
);
1822 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1824 dp
= XFS_BHVTOI(dir_bdp
);
1826 if (XFS_FORCED_SHUTDOWN(dp
->i_mount
))
1827 return XFS_ERROR(EIO
);
1829 lock_mode
= xfs_ilock_map_shared(dp
);
1830 error
= xfs_dir_lookup_int(dir_bdp
, lock_mode
, dentry
, &e_inum
, &ip
);
1832 *vpp
= XFS_ITOV(ip
);
1835 xfs_iunlock_map_shared(dp
, lock_mode
);
1841 * xfs_create (create a new file).
1845 bhv_desc_t
*dir_bdp
,
1851 char *name
= VNAME(dentry
);
1853 xfs_inode_t
*dp
, *ip
;
1859 xfs_bmap_free_t free_list
;
1860 xfs_fsblock_t first_block
;
1861 boolean_t dp_joined_to_trans
;
1862 int dm_event_sent
= 0;
1866 struct xfs_dquot
*udqp
, *gdqp
;
1872 dir_vp
= BHV_TO_VNODE(dir_bdp
);
1873 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
1875 dp
= XFS_BHVTOI(dir_bdp
);
1878 dm_di_mode
= vap
->va_mode
|VTTOIF(vap
->va_type
);
1879 namelen
= VNAMELEN(dentry
);
1881 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_CREATE
)) {
1882 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
1883 dir_vp
, DM_RIGHT_NULL
, NULL
,
1884 DM_RIGHT_NULL
, name
, NULL
,
1892 if (XFS_FORCED_SHUTDOWN(mp
))
1893 return XFS_ERROR(EIO
);
1895 /* Return through std_return after this point. */
1898 if (vap
->va_mask
& XFS_AT_PROJID
)
1899 prid
= (xfs_prid_t
)vap
->va_projid
;
1901 prid
= (xfs_prid_t
)dfltprid
;
1904 * Make sure that we have allocated dquot(s) on disk.
1906 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
1907 current_fsuid(credp
), current_fsgid(credp
),
1908 XFS_QMOPT_QUOTALL
|XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
1913 dp_joined_to_trans
= B_FALSE
;
1915 tp
= xfs_trans_alloc(mp
, XFS_TRANS_CREATE
);
1916 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
1917 resblks
= XFS_CREATE_SPACE_RES(mp
, namelen
);
1919 * Initially assume that the file does not exist and
1920 * reserve the resources for that case. If that is not
1921 * the case we'll drop the one we have and get a more
1922 * appropriate transaction later.
1924 error
= xfs_trans_reserve(tp
, resblks
, XFS_CREATE_LOG_RES(mp
), 0,
1925 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1926 if (error
== ENOSPC
) {
1928 error
= xfs_trans_reserve(tp
, 0, XFS_CREATE_LOG_RES(mp
), 0,
1929 XFS_TRANS_PERM_LOG_RES
, XFS_CREATE_LOG_COUNT
);
1937 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
1939 XFS_BMAP_INIT(&free_list
, &first_block
);
1944 * Reserve disk quota and the inode.
1946 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
1951 (error
= XFS_DIR_CANENTER(mp
, tp
, dp
, name
, namelen
)))
1953 rdev
= (vap
->va_mask
& XFS_AT_RDEV
) ? vap
->va_rdev
: 0;
1954 error
= xfs_dir_ialloc(&tp
, dp
,
1955 MAKEIMODE(vap
->va_type
,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
) {
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
) {
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 (src_vp
->v_type
== VDIR
)
2602 return XFS_ERROR(EPERM
);
2605 * For now, manually find the XFS behavior descriptor for
2606 * the source vnode. If it doesn't exist then something
2607 * is wrong and we should just return an error.
2608 * Eventually we need to figure out how link is going to
2609 * work in the face of stacked vnodes.
2611 src_bdp
= vn_bhv_lookup_unlocked(VN_BHV_HEAD(src_vp
), &xfs_vnodeops
);
2612 if (src_bdp
== NULL
) {
2613 return XFS_ERROR(EXDEV
);
2615 sip
= XFS_BHVTOI(src_bdp
);
2616 tdp
= XFS_BHVTOI(target_dir_bdp
);
2618 if (XFS_FORCED_SHUTDOWN(mp
))
2619 return XFS_ERROR(EIO
);
2621 if (DM_EVENT_ENABLED(src_vp
->v_vfsp
, tdp
, DM_EVENT_LINK
)) {
2622 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_LINK
,
2623 target_dir_vp
, DM_RIGHT_NULL
,
2624 src_vp
, DM_RIGHT_NULL
,
2625 target_name
, NULL
, 0, 0, 0);
2630 /* Return through std_return after this point. */
2632 error
= XFS_QM_DQATTACH(mp
, sip
, 0);
2633 if (!error
&& sip
!= tdp
)
2634 error
= XFS_QM_DQATTACH(mp
, tdp
, 0);
2638 tp
= xfs_trans_alloc(mp
, XFS_TRANS_LINK
);
2639 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2640 resblks
= XFS_LINK_SPACE_RES(mp
, target_namelen
);
2641 error
= xfs_trans_reserve(tp
, resblks
, XFS_LINK_LOG_RES(mp
), 0,
2642 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2643 if (error
== ENOSPC
) {
2645 error
= xfs_trans_reserve(tp
, 0, XFS_LINK_LOG_RES(mp
), 0,
2646 XFS_TRANS_PERM_LOG_RES
, XFS_LINK_LOG_COUNT
);
2653 if (sip
->i_ino
< tdp
->i_ino
) {
2661 xfs_lock_inodes(ips
, 2, 0, XFS_ILOCK_EXCL
);
2664 * Increment vnode ref counts since xfs_trans_commit &
2665 * xfs_trans_cancel will both unlock the inodes and
2666 * decrement the associated ref counts.
2669 VN_HOLD(target_dir_vp
);
2670 xfs_trans_ijoin(tp
, sip
, XFS_ILOCK_EXCL
);
2671 xfs_trans_ijoin(tp
, tdp
, XFS_ILOCK_EXCL
);
2674 * If the source has too many links, we can't make any more to it.
2676 if (sip
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2677 error
= XFS_ERROR(EMLINK
);
2682 (error
= XFS_DIR_CANENTER(mp
, tp
, tdp
, target_name
,
2686 XFS_BMAP_INIT(&free_list
, &first_block
);
2688 error
= XFS_DIR_CREATENAME(mp
, tp
, tdp
, target_name
, target_namelen
,
2689 sip
->i_ino
, &first_block
, &free_list
,
2693 xfs_ichgtime(tdp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2695 xfs_trans_log_inode(tp
, tdp
, XFS_ILOG_CORE
);
2697 error
= xfs_bumplink(tp
, sip
);
2703 * If this is a synchronous mount, make sure that the
2704 * link transaction goes to disk before returning to
2707 if (mp
->m_flags
& XFS_MOUNT_WSYNC
) {
2708 xfs_trans_set_sync(tp
);
2711 error
= xfs_bmap_finish (&tp
, &free_list
, first_block
, &committed
);
2713 xfs_bmap_cancel(&free_list
);
2717 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2722 /* Fall through to std_return with error = 0. */
2724 if (DM_EVENT_ENABLED(src_vp
->v_vfsp
, sip
,
2725 DM_EVENT_POSTLINK
)) {
2726 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTLINK
,
2727 target_dir_vp
, DM_RIGHT_NULL
,
2728 src_vp
, DM_RIGHT_NULL
,
2729 target_name
, NULL
, 0, error
, 0);
2734 cancel_flags
|= XFS_TRANS_ABORT
;
2737 xfs_trans_cancel(tp
, cancel_flags
);
2747 bhv_desc_t
*dir_bdp
,
2753 char *dir_name
= VNAME(dentry
);
2755 xfs_inode_t
*cdp
; /* inode of created dir */
2756 vnode_t
*cvp
; /* vnode of created dir */
2762 xfs_bmap_free_t free_list
;
2763 xfs_fsblock_t first_block
;
2765 boolean_t dp_joined_to_trans
;
2766 boolean_t created
= B_FALSE
;
2767 int dm_event_sent
= 0;
2769 struct xfs_dquot
*udqp
, *gdqp
;
2774 dir_vp
= BHV_TO_VNODE(dir_bdp
);
2775 dp
= XFS_BHVTOI(dir_bdp
);
2778 if (XFS_FORCED_SHUTDOWN(mp
))
2779 return XFS_ERROR(EIO
);
2781 dir_namelen
= VNAMELEN(dentry
);
2784 dp_joined_to_trans
= B_FALSE
;
2785 dm_di_mode
= vap
->va_mode
|VTTOIF(vap
->va_type
);
2787 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_CREATE
)) {
2788 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_CREATE
,
2789 dir_vp
, DM_RIGHT_NULL
, NULL
,
2790 DM_RIGHT_NULL
, dir_name
, NULL
,
2797 /* Return through std_return after this point. */
2799 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
2803 if (vap
->va_mask
& XFS_AT_PROJID
)
2804 prid
= (xfs_prid_t
)vap
->va_projid
;
2806 prid
= (xfs_prid_t
)dfltprid
;
2809 * Make sure that we have allocated dquot(s) on disk.
2811 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
2812 current_fsuid(credp
), current_fsgid(credp
),
2813 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
2817 tp
= xfs_trans_alloc(mp
, XFS_TRANS_MKDIR
);
2818 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
2819 resblks
= XFS_MKDIR_SPACE_RES(mp
, dir_namelen
);
2820 error
= xfs_trans_reserve(tp
, resblks
, XFS_MKDIR_LOG_RES(mp
), 0,
2821 XFS_TRANS_PERM_LOG_RES
, XFS_MKDIR_LOG_COUNT
);
2822 if (error
== ENOSPC
) {
2824 error
= xfs_trans_reserve(tp
, 0, XFS_MKDIR_LOG_RES(mp
), 0,
2825 XFS_TRANS_PERM_LOG_RES
,
2826 XFS_MKDIR_LOG_COUNT
);
2834 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
2837 * Check for directory link count overflow.
2839 if (dp
->i_d
.di_nlink
>= XFS_MAXLINK
) {
2840 error
= XFS_ERROR(EMLINK
);
2845 * Reserve disk quota and the inode.
2847 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
2852 (error
= XFS_DIR_CANENTER(mp
, tp
, dp
, dir_name
, dir_namelen
)))
2855 * create the directory inode.
2857 error
= xfs_dir_ialloc(&tp
, dp
,
2858 MAKEIMODE(vap
->va_type
,vap
->va_mode
), 2,
2859 0, credp
, prid
, resblks
> 0,
2862 if (error
== ENOSPC
)
2869 * Now we add the directory inode to the transaction.
2870 * We waited until now since xfs_dir_ialloc might start
2871 * a new transaction. Had we joined the transaction
2872 * earlier, the locks might have gotten released.
2875 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
2876 dp_joined_to_trans
= B_TRUE
;
2878 XFS_BMAP_INIT(&free_list
, &first_block
);
2880 error
= XFS_DIR_CREATENAME(mp
, tp
, dp
, dir_name
, dir_namelen
,
2881 cdp
->i_ino
, &first_block
, &free_list
,
2882 resblks
? resblks
- XFS_IALLOC_SPACE_RES(mp
) : 0);
2884 ASSERT(error
!= ENOSPC
);
2887 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
2890 * Bump the in memory version number of the parent directory
2891 * so that other processes accessing it will recognize that
2892 * the directory has changed.
2896 error
= XFS_DIR_INIT(mp
, tp
, cdp
, dp
);
2902 error
= xfs_bumplink(tp
, dp
);
2907 cvp
= XFS_ITOV(cdp
);
2915 * Attach the dquots to the new inode and modify the icount incore.
2917 XFS_QM_DQVOPCREATE(mp
, tp
, cdp
, udqp
, gdqp
);
2920 * If this is a synchronous mount, make sure that the
2921 * mkdir transaction goes to disk before returning to
2924 if (mp
->m_flags
& XFS_MOUNT_WSYNC
) {
2925 xfs_trans_set_sync(tp
);
2928 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
2934 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
2935 XFS_QM_DQRELE(mp
, udqp
);
2936 XFS_QM_DQRELE(mp
, gdqp
);
2941 /* Fall through to std_return with error = 0 or errno from
2942 * xfs_trans_commit. */
2945 if ( (created
|| (error
!= 0 && dm_event_sent
!= 0)) &&
2946 DM_EVENT_ENABLED(dir_vp
->v_vfsp
, XFS_BHVTOI(dir_bdp
),
2947 DM_EVENT_POSTCREATE
)) {
2948 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTCREATE
,
2949 dir_vp
, DM_RIGHT_NULL
,
2950 created
? XFS_ITOV(cdp
):NULL
,
2953 dm_di_mode
, error
, 0);
2959 xfs_bmap_cancel(&free_list
);
2961 cancel_flags
|= XFS_TRANS_ABORT
;
2963 xfs_trans_cancel(tp
, cancel_flags
);
2964 XFS_QM_DQRELE(mp
, udqp
);
2965 XFS_QM_DQRELE(mp
, gdqp
);
2967 if (!dp_joined_to_trans
&& (dp
!= NULL
)) {
2968 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
2981 bhv_desc_t
*dir_bdp
,
2985 char *name
= VNAME(dentry
);
2987 xfs_inode_t
*cdp
; /* child directory */
2991 xfs_bmap_free_t free_list
;
2992 xfs_fsblock_t first_block
;
3001 dir_vp
= BHV_TO_VNODE(dir_bdp
);
3002 dp
= XFS_BHVTOI(dir_bdp
);
3005 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
3007 if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp
)->i_mount
))
3008 return XFS_ERROR(EIO
);
3009 namelen
= VNAMELEN(dentry
);
3011 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_REMOVE
)) {
3012 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_REMOVE
,
3013 dir_vp
, DM_RIGHT_NULL
,
3014 NULL
, DM_RIGHT_NULL
,
3015 name
, NULL
, 0, 0, 0);
3017 return XFS_ERROR(error
);
3020 /* Return through std_return after this point. */
3025 * We need to get a reference to cdp before we get our log
3026 * reservation. The reason for this is that we cannot call
3027 * xfs_iget for an inode for which we do not have a reference
3028 * once we've acquired a log reservation. This is because the
3029 * inode we are trying to get might be in xfs_inactive going
3030 * for a log reservation. Since we'll have to wait for the
3031 * inactive code to complete before returning from xfs_iget,
3032 * we need to make sure that we don't have log space reserved
3033 * when we call xfs_iget. Instead we get an unlocked referece
3034 * to the inode before getting our log reservation.
3036 error
= xfs_get_dir_entry(dentry
, &cdp
);
3038 REMOVE_DEBUG_TRACE(__LINE__
);
3042 dm_di_mode
= cdp
->i_d
.di_mode
;
3045 * Get the dquots for the inodes.
3047 error
= XFS_QM_DQATTACH(mp
, dp
, 0);
3048 if (!error
&& dp
!= cdp
)
3049 error
= XFS_QM_DQATTACH(mp
, cdp
, 0);
3052 REMOVE_DEBUG_TRACE(__LINE__
);
3056 tp
= xfs_trans_alloc(mp
, XFS_TRANS_RMDIR
);
3057 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
3059 * We try to get the real space reservation first,
3060 * allowing for directory btree deletion(s) implying
3061 * possible bmap insert(s). If we can't get the space
3062 * reservation then we use 0 instead, and avoid the bmap
3063 * btree insert(s) in the directory code by, if the bmap
3064 * insert tries to happen, instead trimming the LAST
3065 * block from the directory.
3067 resblks
= XFS_REMOVE_SPACE_RES(mp
);
3068 error
= xfs_trans_reserve(tp
, resblks
, XFS_REMOVE_LOG_RES(mp
), 0,
3069 XFS_TRANS_PERM_LOG_RES
, XFS_DEFAULT_LOG_COUNT
);
3070 if (error
== ENOSPC
) {
3072 error
= xfs_trans_reserve(tp
, 0, XFS_REMOVE_LOG_RES(mp
), 0,
3073 XFS_TRANS_PERM_LOG_RES
, XFS_DEFAULT_LOG_COUNT
);
3076 ASSERT(error
!= ENOSPC
);
3081 XFS_BMAP_INIT(&free_list
, &first_block
);
3084 * Now lock the child directory inode and the parent directory
3085 * inode in the proper order. This will take care of validating
3086 * that the directory entry for the child directory inode has
3087 * not changed while we were obtaining a log reservation.
3089 error
= xfs_lock_dir_and_entry(dp
, dentry
, cdp
);
3091 xfs_trans_cancel(tp
, cancel_flags
);
3096 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
3099 * Only increment the parent directory vnode count if
3100 * we didn't bump it in looking up cdp. The only time
3101 * we don't bump it is when we're looking up ".".
3107 xfs_trans_ijoin(tp
, cdp
, XFS_ILOCK_EXCL
);
3109 ASSERT(cdp
->i_d
.di_nlink
>= 2);
3110 if (cdp
->i_d
.di_nlink
!= 2) {
3111 error
= XFS_ERROR(ENOTEMPTY
);
3114 if (!XFS_DIR_ISEMPTY(mp
, cdp
)) {
3115 error
= XFS_ERROR(ENOTEMPTY
);
3119 error
= XFS_DIR_REMOVENAME(mp
, tp
, dp
, name
, namelen
, cdp
->i_ino
,
3120 &first_block
, &free_list
, resblks
);
3125 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
3128 * Bump the in memory generation count on the parent
3129 * directory so that other can know that it has changed.
3134 * Drop the link from cdp's "..".
3136 error
= xfs_droplink(tp
, dp
);
3142 * Drop the link from dp to cdp.
3144 error
= xfs_droplink(tp
, cdp
);
3150 * Drop the "." link from cdp to self.
3152 error
= xfs_droplink(tp
, cdp
);
3157 /* Determine these before committing transaction */
3158 last_cdp_link
= (cdp
)->i_d
.di_nlink
==0;
3161 * Take an extra ref on the child vnode so that it
3162 * does not go to xfs_inactive() from within the commit.
3167 * If this is a synchronous mount, make sure that the
3168 * rmdir transaction goes to disk before returning to
3171 if (mp
->m_flags
& XFS_MOUNT_WSYNC
) {
3172 xfs_trans_set_sync(tp
);
3175 error
= xfs_bmap_finish (&tp
, &free_list
, first_block
, &committed
);
3177 xfs_bmap_cancel(&free_list
);
3178 xfs_trans_cancel(tp
, (XFS_TRANS_RELEASE_LOG_RES
|
3184 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
3192 * Let interposed file systems know about removed links.
3194 VOP_LINK_REMOVED(XFS_ITOV(cdp
), dir_vp
, last_cdp_link
);
3198 /* Fall through to std_return with error = 0 or the errno
3199 * from xfs_trans_commit. */
3201 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_POSTREMOVE
)) {
3202 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTREMOVE
,
3203 dir_vp
, DM_RIGHT_NULL
,
3204 NULL
, DM_RIGHT_NULL
,
3205 name
, NULL
, dm_di_mode
,
3211 xfs_bmap_cancel(&free_list
);
3212 cancel_flags
|= XFS_TRANS_ABORT
;
3214 xfs_trans_cancel(tp
, cancel_flags
);
3222 * Read dp's entries starting at uiop->uio_offset and translate them into
3223 * bufsize bytes worth of struct dirents starting at bufbase.
3227 bhv_desc_t
*dir_bdp
,
3233 xfs_trans_t
*tp
= NULL
;
3236 xfs_off_t start_offset
;
3238 vn_trace_entry(BHV_TO_VNODE(dir_bdp
), __FUNCTION__
,
3239 (inst_t
*)__return_address
);
3240 dp
= XFS_BHVTOI(dir_bdp
);
3242 if (XFS_FORCED_SHUTDOWN(dp
->i_mount
)) {
3243 return XFS_ERROR(EIO
);
3246 lock_mode
= xfs_ilock_map_shared(dp
);
3247 start_offset
= uiop
->uio_offset
;
3248 error
= XFS_DIR_GETDENTS(dp
->i_mount
, tp
, dp
, uiop
, eofp
);
3249 if (start_offset
!= uiop
->uio_offset
) {
3250 xfs_ichgtime(dp
, XFS_ICHGTIME_ACC
);
3252 xfs_iunlock_map_shared(dp
, lock_mode
);
3263 bhv_desc_t
*dir_bdp
,
3276 xfs_bmap_free_t free_list
;
3277 xfs_fsblock_t first_block
;
3278 boolean_t dp_joined_to_trans
;
3282 xfs_fileoff_t first_fsb
;
3283 xfs_filblks_t fs_blocks
;
3285 xfs_bmbt_irec_t mval
[SYMLINK_MAPS
];
3292 struct xfs_dquot
*udqp
, *gdqp
;
3294 char *link_name
= VNAME(dentry
);
3298 dir_vp
= BHV_TO_VNODE(dir_bdp
);
3299 dp
= XFS_BHVTOI(dir_bdp
);
3300 dp_joined_to_trans
= B_FALSE
;
3305 vn_trace_entry(dir_vp
, __FUNCTION__
, (inst_t
*)__return_address
);
3309 if (XFS_FORCED_SHUTDOWN(mp
))
3310 return XFS_ERROR(EIO
);
3312 link_namelen
= VNAMELEN(dentry
);
3315 * Check component lengths of the target path name.
3317 pathlen
= strlen(target_path
);
3318 if (pathlen
>= MAXPATHLEN
) /* total string too long */
3319 return XFS_ERROR(ENAMETOOLONG
);
3320 if (pathlen
>= MAXNAMELEN
) { /* is any component too long? */
3324 for(total
= 0, path
= target_path
; total
< pathlen
;) {
3328 while(*path
== '/') {
3334 * Count up to the next slash or end of path.
3335 * Error out if the component is bigger than MAXNAMELEN.
3337 for(len
= 0; *path
!= '/' && total
< pathlen
;total
++, path
++) {
3338 if (++len
>= MAXNAMELEN
) {
3339 error
= ENAMETOOLONG
;
3346 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, dp
, DM_EVENT_SYMLINK
)) {
3347 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_SYMLINK
, dir_vp
,
3348 DM_RIGHT_NULL
, NULL
, DM_RIGHT_NULL
,
3349 link_name
, target_path
, 0, 0, 0);
3354 /* Return through std_return after this point. */
3357 if (vap
->va_mask
& XFS_AT_PROJID
)
3358 prid
= (xfs_prid_t
)vap
->va_projid
;
3360 prid
= (xfs_prid_t
)dfltprid
;
3363 * Make sure that we have allocated dquot(s) on disk.
3365 error
= XFS_QM_DQVOPALLOC(mp
, dp
,
3366 current_fsuid(credp
), current_fsgid(credp
),
3367 XFS_QMOPT_QUOTALL
| XFS_QMOPT_INHERIT
, &udqp
, &gdqp
);
3371 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SYMLINK
);
3372 cancel_flags
= XFS_TRANS_RELEASE_LOG_RES
;
3374 * The symlink will fit into the inode data fork?
3375 * There can't be any attributes so we get the whole variable part.
3377 if (pathlen
<= XFS_LITINO(mp
))
3380 fs_blocks
= XFS_B_TO_FSB(mp
, pathlen
);
3381 resblks
= XFS_SYMLINK_SPACE_RES(mp
, link_namelen
, fs_blocks
);
3382 error
= xfs_trans_reserve(tp
, resblks
, XFS_SYMLINK_LOG_RES(mp
), 0,
3383 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
3384 if (error
== ENOSPC
&& fs_blocks
== 0) {
3386 error
= xfs_trans_reserve(tp
, 0, XFS_SYMLINK_LOG_RES(mp
), 0,
3387 XFS_TRANS_PERM_LOG_RES
, XFS_SYMLINK_LOG_COUNT
);
3395 xfs_ilock(dp
, XFS_ILOCK_EXCL
);
3398 * Check whether the directory allows new symlinks or not.
3400 if (dp
->i_d
.di_flags
& XFS_DIFLAG_NOSYMLINKS
) {
3401 error
= XFS_ERROR(EPERM
);
3406 * Reserve disk quota : blocks and inode.
3408 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
, udqp
, gdqp
, resblks
, 1, 0);
3413 * Check for ability to enter directory entry, if no space reserved.
3416 (error
= XFS_DIR_CANENTER(mp
, tp
, dp
, link_name
, link_namelen
)))
3419 * Initialize the bmap freelist prior to calling either
3420 * bmapi or the directory create code.
3422 XFS_BMAP_INIT(&free_list
, &first_block
);
3425 * Allocate an inode for the symlink.
3427 error
= xfs_dir_ialloc(&tp
, dp
, S_IFLNK
| (vap
->va_mode
&~S_IFMT
),
3428 1, 0, credp
, prid
, resblks
> 0, &ip
, NULL
);
3430 if (error
== ENOSPC
)
3437 xfs_trans_ijoin(tp
, dp
, XFS_ILOCK_EXCL
);
3438 dp_joined_to_trans
= B_TRUE
;
3441 * Also attach the dquot(s) to it, if applicable.
3443 XFS_QM_DQVOPCREATE(mp
, tp
, ip
, udqp
, gdqp
);
3446 resblks
-= XFS_IALLOC_SPACE_RES(mp
);
3448 * If the symlink will fit into the inode, write it inline.
3450 if (pathlen
<= XFS_IFORK_DSIZE(ip
)) {
3451 xfs_idata_realloc(ip
, pathlen
, XFS_DATA_FORK
);
3452 memcpy(ip
->i_df
.if_u1
.if_data
, target_path
, pathlen
);
3453 ip
->i_d
.di_size
= pathlen
;
3456 * The inode was initially created in extent format.
3458 ip
->i_df
.if_flags
&= ~(XFS_IFEXTENTS
| XFS_IFBROOT
);
3459 ip
->i_df
.if_flags
|= XFS_IFINLINE
;
3461 ip
->i_d
.di_format
= XFS_DINODE_FMT_LOCAL
;
3462 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_DDATA
| XFS_ILOG_CORE
);
3466 nmaps
= SYMLINK_MAPS
;
3468 error
= xfs_bmapi(tp
, ip
, first_fsb
, fs_blocks
,
3469 XFS_BMAPI_WRITE
| XFS_BMAPI_METADATA
,
3470 &first_block
, resblks
, mval
, &nmaps
,
3477 resblks
-= fs_blocks
;
3478 ip
->i_d
.di_size
= pathlen
;
3479 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
3481 cur_chunk
= target_path
;
3482 for (n
= 0; n
< nmaps
; n
++) {
3483 d
= XFS_FSB_TO_DADDR(mp
, mval
[n
].br_startblock
);
3484 byte_cnt
= XFS_FSB_TO_B(mp
, mval
[n
].br_blockcount
);
3485 bp
= xfs_trans_get_buf(tp
, mp
->m_ddev_targp
, d
,
3486 BTOBB(byte_cnt
), 0);
3487 ASSERT(bp
&& !XFS_BUF_GETERROR(bp
));
3488 if (pathlen
< byte_cnt
) {
3491 pathlen
-= byte_cnt
;
3493 memcpy(XFS_BUF_PTR(bp
), cur_chunk
, byte_cnt
);
3494 cur_chunk
+= byte_cnt
;
3496 xfs_trans_log_buf(tp
, bp
, 0, byte_cnt
- 1);
3501 * Create the directory entry for the symlink.
3503 error
= XFS_DIR_CREATENAME(mp
, tp
, dp
, link_name
, link_namelen
,
3504 ip
->i_ino
, &first_block
, &free_list
, resblks
);
3508 xfs_ichgtime(dp
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
3509 xfs_trans_log_inode(tp
, dp
, XFS_ILOG_CORE
);
3512 * Bump the in memory version number of the parent directory
3513 * so that other processes accessing it will recognize that
3514 * the directory has changed.
3519 * If this is a synchronous mount, make sure that the
3520 * symlink transaction goes to disk before returning to
3523 if (mp
->m_flags
& XFS_MOUNT_WSYNC
) {
3524 xfs_trans_set_sync(tp
);
3528 * xfs_trans_commit normally decrements the vnode ref count
3529 * when it unlocks the inode. Since we want to return the
3530 * vnode to the caller, we bump the vnode ref count now.
3534 error
= xfs_bmap_finish(&tp
, &free_list
, first_block
, &committed
);
3538 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
3539 XFS_QM_DQRELE(mp
, udqp
);
3540 XFS_QM_DQRELE(mp
, gdqp
);
3542 /* Fall through to std_return with error = 0 or errno from
3543 * xfs_trans_commit */
3545 if (DM_EVENT_ENABLED(dir_vp
->v_vfsp
, XFS_BHVTOI(dir_bdp
),
3546 DM_EVENT_POSTSYMLINK
)) {
3547 (void) XFS_SEND_NAMESP(mp
, DM_EVENT_POSTSYMLINK
,
3548 dir_vp
, DM_RIGHT_NULL
,
3549 error
? NULL
: XFS_ITOV(ip
),
3550 DM_RIGHT_NULL
, link_name
, target_path
,
3566 xfs_bmap_cancel(&free_list
);
3567 cancel_flags
|= XFS_TRANS_ABORT
;
3569 xfs_trans_cancel(tp
, cancel_flags
);
3570 XFS_QM_DQRELE(mp
, udqp
);
3571 XFS_QM_DQRELE(mp
, gdqp
);
3573 if (!dp_joined_to_trans
&& (dp
!= NULL
)) {
3574 xfs_iunlock(dp
, XFS_ILOCK_EXCL
);
3584 * A fid routine that takes a pointer to a previously allocated
3585 * fid structure (like xfs_fast_fid) but uses a 64 bit inode number.
3595 vn_trace_entry(BHV_TO_VNODE(bdp
), __FUNCTION__
,
3596 (inst_t
*)__return_address
);
3597 ASSERT(sizeof(fid_t
) >= sizeof(xfs_fid2_t
));
3599 xfid
= (xfs_fid2_t
*)fidp
;
3600 ip
= XFS_BHVTOI(bdp
);
3601 xfid
->fid_len
= sizeof(xfs_fid2_t
) - sizeof(xfid
->fid_len
);
3604 * use memcpy because the inode is a long long and there's no
3605 * assurance that xfid->fid_ino is properly aligned.
3607 memcpy(&xfid
->fid_ino
, &ip
->i_ino
, sizeof(xfid
->fid_ino
));
3608 xfid
->fid_gen
= ip
->i_d
.di_gen
;
3625 vp
= BHV_TO_VNODE(bdp
);
3626 if (vp
->v_type
== VDIR
)
3628 ip
= XFS_BHVTOI(bdp
);
3629 if (locktype
== VRWLOCK_WRITE
) {
3630 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
3631 } else if (locktype
== VRWLOCK_TRY_READ
) {
3632 return (xfs_ilock_nowait(ip
, XFS_IOLOCK_SHARED
));
3633 } else if (locktype
== VRWLOCK_TRY_WRITE
) {
3634 return (xfs_ilock_nowait(ip
, XFS_IOLOCK_EXCL
));
3636 ASSERT((locktype
== VRWLOCK_READ
) ||
3637 (locktype
== VRWLOCK_WRITE_DIRECT
));
3638 xfs_ilock(ip
, XFS_IOLOCK_SHARED
);
3656 vp
= BHV_TO_VNODE(bdp
);
3657 if (vp
->v_type
== VDIR
)
3659 ip
= XFS_BHVTOI(bdp
);
3660 if (locktype
== VRWLOCK_WRITE
) {
3662 * In the write case, we may have added a new entry to
3663 * the reference cache. This might store a pointer to
3664 * an inode to be released in this inode. If it is there,
3665 * clear the pointer and release the inode after unlocking
3668 xfs_refcache_iunlock(ip
, XFS_IOLOCK_EXCL
);
3670 ASSERT((locktype
== VRWLOCK_READ
) ||
3671 (locktype
== VRWLOCK_WRITE_DIRECT
));
3672 xfs_iunlock(ip
, XFS_IOLOCK_SHARED
);
3686 ip
= XFS_BHVTOI(bdp
);
3689 if (XFS_FORCED_SHUTDOWN(mp
))
3690 return XFS_ERROR(EIO
);
3692 /* Bypass inodes which have already been cleaned by
3693 * the inode flush clustering code inside xfs_iflush
3695 if ((ip
->i_update_core
== 0) &&
3696 ((ip
->i_itemp
== NULL
) ||
3697 !(ip
->i_itemp
->ili_format
.ilf_fields
& XFS_ILOG_ALL
)))
3700 if (flags
& FLUSH_LOG
) {
3701 xfs_inode_log_item_t
*iip
= ip
->i_itemp
;
3703 if (iip
&& iip
->ili_last_lsn
) {
3704 xlog_t
*log
= mp
->m_log
;
3706 int s
, log_flags
= XFS_LOG_FORCE
;
3708 s
= GRANT_LOCK(log
);
3709 sync_lsn
= log
->l_last_sync_lsn
;
3710 GRANT_UNLOCK(log
, s
);
3712 if ((XFS_LSN_CMP(iip
->ili_last_lsn
, sync_lsn
) <= 0))
3715 if (flags
& FLUSH_SYNC
)
3716 log_flags
|= XFS_LOG_SYNC
;
3717 return xfs_log_force(mp
, iip
->ili_last_lsn
,
3722 /* We make this non-blocking if the inode is contended,
3723 * return EAGAIN to indicate to the caller that they
3724 * did not succeed. This prevents the flush path from
3725 * blocking on inodes inside another operation right
3726 * now, they get caught later by xfs_sync.
3728 if (flags
& FLUSH_INODE
) {
3731 if (xfs_ipincount(ip
))
3734 if (flags
& FLUSH_SYNC
) {
3735 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
3737 } else if (xfs_ilock_nowait(ip
, XFS_ILOCK_SHARED
)) {
3738 if (xfs_ipincount(ip
) || !xfs_iflock_nowait(ip
)) {
3739 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
3746 if (flags
& FLUSH_SYNC
)
3747 flush_flags
= XFS_IFLUSH_SYNC
;
3749 flush_flags
= XFS_IFLUSH_ASYNC
;
3751 error
= xfs_iflush(ip
, flush_flags
);
3752 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
3771 if (!capable(CAP_SYS_ADMIN
))
3772 return XFS_ERROR(EPERM
);
3774 ip
= XFS_BHVTOI(bdp
);
3777 if (XFS_FORCED_SHUTDOWN(mp
))
3778 return XFS_ERROR(EIO
);
3780 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SET_DMATTRS
);
3781 error
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES (mp
), 0, 0, 0);
3783 xfs_trans_cancel(tp
, 0);
3786 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3787 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
3789 ip
->i_iocore
.io_dmevmask
= ip
->i_d
.di_dmevmask
= evmask
;
3790 ip
->i_iocore
.io_dmstate
= ip
->i_d
.di_dmstate
= state
;
3792 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
3794 error
= xfs_trans_commit(tp
, 0, NULL
);
3810 vp
= BHV_TO_VNODE(bdp
);
3811 ip
= XFS_BHVTOI(bdp
);
3813 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
3815 ASSERT(!VN_MAPPED(vp
));
3817 /* bad inode, get out here ASAP */
3823 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) {
3824 if (ip
->i_d
.di_size
> 0) {
3826 * Flush and invalidate any data left around that is
3827 * a part of this file.
3829 * Get the inode's i/o lock so that buffers are pushed
3830 * out while holding the proper lock. We can't hold
3831 * the inode lock here since flushing out buffers may
3832 * cause us to try to get the lock in xfs_strategy().
3834 * We don't have to call remapf() here, because there
3835 * cannot be any mapped file references to this vnode
3836 * since it is being reclaimed.
3838 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
3841 * If we hit an IO error, we need to make sure that the
3842 * buffer and page caches of file data for
3843 * the file are tossed away. We don't want to use
3844 * VOP_FLUSHINVAL_PAGES here because we don't want dirty
3845 * pages to stay attached to the vnode, but be
3846 * marked P_BAD. pdflush/vnode_pagebad
3849 if (!XFS_FORCED_SHUTDOWN(ip
->i_mount
)) {
3850 VOP_FLUSHINVAL_PAGES(vp
, 0, -1, FI_NONE
);
3852 VOP_TOSS_PAGES(vp
, 0, -1, FI_NONE
);
3855 ASSERT(VN_CACHED(vp
) == 0);
3856 ASSERT(XFS_FORCED_SHUTDOWN(ip
->i_mount
) ||
3857 ip
->i_delayed_blks
== 0);
3858 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
3859 } else if (XFS_FORCED_SHUTDOWN(ip
->i_mount
)) {
3861 * di_size field may not be quite accurate if we're
3864 VOP_TOSS_PAGES(vp
, 0, -1, FI_NONE
);
3865 ASSERT(VN_CACHED(vp
) == 0);
3869 /* If we have nothing to flush with this inode then complete the
3870 * teardown now, otherwise break the link between the xfs inode
3871 * and the linux inode and clean up the xfs inode later. This
3872 * avoids flushing the inode to disk during the delete operation
3875 if (!ip
->i_update_core
&& (ip
->i_itemp
== NULL
)) {
3876 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3878 return xfs_finish_reclaim(ip
, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC
);
3880 xfs_mount_t
*mp
= ip
->i_mount
;
3882 /* Protect sync from us */
3883 XFS_MOUNT_ILOCK(mp
);
3884 vn_bhv_remove(VN_BHV_HEAD(vp
), XFS_ITOBHV(ip
));
3885 list_add_tail(&ip
->i_reclaim
, &mp
->m_del_inodes
);
3886 ip
->i_flags
|= XFS_IRECLAIMABLE
;
3887 XFS_MOUNT_IUNLOCK(mp
);
3898 xfs_ihash_t
*ih
= ip
->i_hash
;
3899 vnode_t
*vp
= XFS_ITOV_NULL(ip
);
3902 if (vp
&& VN_BAD(vp
))
3905 /* The hash lock here protects a thread in xfs_iget_core from
3906 * racing with us on linking the inode back with a vnode.
3907 * Once we have the XFS_IRECLAIM flag set it will not touch
3910 write_lock(&ih
->ih_lock
);
3911 if ((ip
->i_flags
& XFS_IRECLAIM
) ||
3912 (!(ip
->i_flags
& XFS_IRECLAIMABLE
) && vp
== NULL
)) {
3913 write_unlock(&ih
->ih_lock
);
3916 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3920 ip
->i_flags
|= XFS_IRECLAIM
;
3921 write_unlock(&ih
->ih_lock
);
3924 * If the inode is still dirty, then flush it out. If the inode
3925 * is not in the AIL, then it will be OK to flush it delwri as
3926 * long as xfs_iflush() does not keep any references to the inode.
3927 * We leave that decision up to xfs_iflush() since it has the
3928 * knowledge of whether it's OK to simply do a delwri flush of
3929 * the inode or whether we need to wait until the inode is
3930 * pulled from the AIL.
3931 * We get the flush lock regardless, though, just to make sure
3932 * we don't free it while it is being flushed.
3934 if (!XFS_FORCED_SHUTDOWN(ip
->i_mount
)) {
3936 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
3940 if (ip
->i_update_core
||
3941 ((ip
->i_itemp
!= NULL
) &&
3942 (ip
->i_itemp
->ili_format
.ilf_fields
!= 0))) {
3943 error
= xfs_iflush(ip
, sync_mode
);
3945 * If we hit an error, typically because of filesystem
3946 * shutdown, we don't need to let vn_reclaim to know
3947 * because we're gonna reclaim the inode anyway.
3950 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3954 xfs_iflock(ip
); /* synchronize with xfs_iflush_done */
3957 ASSERT(ip
->i_update_core
== 0);
3958 ASSERT(ip
->i_itemp
== NULL
||
3959 ip
->i_itemp
->ili_format
.ilf_fields
== 0);
3960 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3961 } else if (locked
) {
3963 * We are not interested in doing an iflush if we're
3964 * in the process of shutting down the filesystem forcibly.
3965 * So, just reclaim the inode.
3968 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3976 xfs_finish_reclaim_all(xfs_mount_t
*mp
, int noblock
)
3979 xfs_inode_t
*ip
, *n
;
3984 XFS_MOUNT_ILOCK(mp
);
3985 list_for_each_entry_safe(ip
, n
, &mp
->m_del_inodes
, i_reclaim
) {
3987 if (xfs_ilock_nowait(ip
, XFS_ILOCK_EXCL
) == 0)
3989 if (xfs_ipincount(ip
) ||
3990 !xfs_iflock_nowait(ip
)) {
3991 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
3995 XFS_MOUNT_IUNLOCK(mp
);
3996 xfs_finish_reclaim(ip
, noblock
,
3997 XFS_IFLUSH_DELWRI_ELSE_ASYNC
);
4005 XFS_MOUNT_IUNLOCK(mp
);
4010 * xfs_alloc_file_space()
4011 * This routine allocates disk space for the given file.
4013 * If alloc_type == 0, this request is for an ALLOCSP type
4014 * request which will change the file size. In this case, no
4015 * DMAPI event will be generated by the call. A TRUNCATE event
4016 * will be generated later by xfs_setattr.
4018 * If alloc_type != 0, this request is for a RESVSP type
4019 * request, and a DMAPI DM_EVENT_WRITE will be generated if the
4020 * lower block boundary byte address is less than the file's
4029 xfs_alloc_file_space(
4036 xfs_filblks_t allocated_fsb
;
4037 xfs_filblks_t allocatesize_fsb
;
4040 xfs_filblks_t datablocks
;
4042 xfs_fsblock_t firstfsb
;
4043 xfs_bmap_free_t free_list
;
4044 xfs_bmbt_irec_t
*imapp
;
4045 xfs_bmbt_irec_t imaps
[1];
4052 xfs_fileoff_t startoffset_fsb
;
4054 int xfs_bmapi_flags
;
4056 vn_trace_entry(XFS_ITOV(ip
), __FUNCTION__
, (inst_t
*)__return_address
);
4059 if (XFS_FORCED_SHUTDOWN(mp
))
4060 return XFS_ERROR(EIO
);
4063 * determine if this is a realtime file
4065 if ((rt
= XFS_IS_REALTIME_INODE(ip
)) != 0) {
4066 if (ip
->i_d
.di_extsize
)
4067 rtextsize
= ip
->i_d
.di_extsize
;
4069 rtextsize
= mp
->m_sb
.sb_rextsize
;
4073 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
4077 return XFS_ERROR(EINVAL
);
4083 xfs_bmapi_flags
= XFS_BMAPI_WRITE
| (alloc_type
? XFS_BMAPI_PREALLOC
: 0);
4084 startoffset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
4085 allocatesize_fsb
= XFS_B_TO_FSB(mp
, count
);
4087 /* Generate a DMAPI event if needed. */
4088 if (alloc_type
!= 0 && offset
< ip
->i_d
.di_size
&&
4089 (attr_flags
&ATTR_DMI
) == 0 &&
4090 DM_EVENT_ENABLED(XFS_MTOVFS(mp
), ip
, DM_EVENT_WRITE
)) {
4091 xfs_off_t end_dmi_offset
;
4093 end_dmi_offset
= offset
+len
;
4094 if (end_dmi_offset
> ip
->i_d
.di_size
)
4095 end_dmi_offset
= ip
->i_d
.di_size
;
4096 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, XFS_ITOV(ip
),
4097 offset
, end_dmi_offset
- offset
,
4104 * allocate file space until done or until there is an error
4107 while (allocatesize_fsb
&& !error
) {
4109 * determine if reserving space on
4110 * the data or realtime partition.
4115 s
= startoffset_fsb
;
4116 do_div(s
, rtextsize
);
4118 e
= roundup_64(startoffset_fsb
+ allocatesize_fsb
,
4120 numrtextents
= (int)(e
- s
) / mp
->m_sb
.sb_rextsize
;
4123 datablocks
= allocatesize_fsb
;
4128 * allocate and setup the transaction
4130 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
4131 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, datablocks
);
4132 error
= xfs_trans_reserve(tp
,
4134 XFS_WRITE_LOG_RES(mp
),
4136 XFS_TRANS_PERM_LOG_RES
,
4137 XFS_WRITE_LOG_COUNT
);
4140 * check for running out of space
4144 * Free the transaction structure.
4146 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
4147 xfs_trans_cancel(tp
, 0);
4150 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
4151 error
= XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp
, tp
,
4152 ip
->i_udquot
, ip
->i_gdquot
, resblks
, 0, rt
?
4153 XFS_QMOPT_RES_RTBLKS
: XFS_QMOPT_RES_REGBLKS
);
4157 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
4158 xfs_trans_ihold(tp
, ip
);
4161 * issue the bmapi() call to allocate the blocks
4163 XFS_BMAP_INIT(&free_list
, &firstfsb
);
4164 error
= xfs_bmapi(tp
, ip
, startoffset_fsb
,
4165 allocatesize_fsb
, xfs_bmapi_flags
,
4166 &firstfsb
, 0, imapp
, &reccount
,
4173 * complete the transaction
4175 error
= xfs_bmap_finish(&tp
, &free_list
, firstfsb
, &committed
);
4180 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
4181 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4186 allocated_fsb
= imapp
->br_blockcount
;
4188 if (reccount
== 0) {
4189 error
= XFS_ERROR(ENOSPC
);
4193 startoffset_fsb
+= allocated_fsb
;
4194 allocatesize_fsb
-= allocated_fsb
;
4197 if (error
== ENOSPC
&& (attr_flags
&ATTR_DMI
) == 0 &&
4198 DM_EVENT_ENABLED(XFS_MTOVFS(mp
), ip
, DM_EVENT_NOSPACE
)) {
4200 error
= XFS_SEND_NAMESP(mp
, DM_EVENT_NOSPACE
,
4201 XFS_ITOV(ip
), DM_RIGHT_NULL
,
4202 XFS_ITOV(ip
), DM_RIGHT_NULL
,
4203 NULL
, NULL
, 0, 0, 0); /* Delay flag intentionally unused */
4205 goto retry
; /* Maybe DMAPI app. has made space */
4206 /* else fall through with error from XFS_SEND_DATA */
4212 xfs_bmap_cancel(&free_list
);
4214 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
4215 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4216 goto dmapi_enospc_check
;
4220 * Zero file bytes between startoff and endoff inclusive.
4221 * The iolock is held exclusive and no blocks are buffered.
4224 xfs_zero_remaining_bytes(
4229 xfs_bmbt_irec_t imap
;
4230 xfs_fileoff_t offset_fsb
;
4231 xfs_off_t lastoffset
;
4234 xfs_mount_t
*mp
= ip
->i_mount
;
4238 bp
= xfs_buf_get_noaddr(mp
->m_sb
.sb_blocksize
,
4239 ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
?
4240 mp
->m_rtdev_targp
: mp
->m_ddev_targp
);
4242 for (offset
= startoff
; offset
<= endoff
; offset
= lastoffset
+ 1) {
4243 offset_fsb
= XFS_B_TO_FSBT(mp
, offset
);
4245 error
= xfs_bmapi(NULL
, ip
, offset_fsb
, 1, 0, NULL
, 0, &imap
,
4247 if (error
|| nimap
< 1)
4249 ASSERT(imap
.br_blockcount
>= 1);
4250 ASSERT(imap
.br_startoff
== offset_fsb
);
4251 lastoffset
= XFS_FSB_TO_B(mp
, imap
.br_startoff
+ 1) - 1;
4252 if (lastoffset
> endoff
)
4253 lastoffset
= endoff
;
4254 if (imap
.br_startblock
== HOLESTARTBLOCK
)
4256 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
4257 if (imap
.br_state
== XFS_EXT_UNWRITTEN
)
4260 XFS_BUF_UNWRITE(bp
);
4262 XFS_BUF_SET_ADDR(bp
, XFS_FSB_TO_DB(ip
, imap
.br_startblock
));
4264 if ((error
= xfs_iowait(bp
))) {
4265 xfs_ioerror_alert("xfs_zero_remaining_bytes(read)",
4266 mp
, bp
, XFS_BUF_ADDR(bp
));
4269 memset(XFS_BUF_PTR(bp
) +
4270 (offset
- XFS_FSB_TO_B(mp
, imap
.br_startoff
)),
4271 0, lastoffset
- offset
+ 1);
4276 if ((error
= xfs_iowait(bp
))) {
4277 xfs_ioerror_alert("xfs_zero_remaining_bytes(write)",
4278 mp
, bp
, XFS_BUF_ADDR(bp
));
4287 * xfs_free_file_space()
4288 * This routine frees disk space for the given file.
4290 * This routine is only called by xfs_change_file_space
4291 * for an UNRESVSP type call.
4299 xfs_free_file_space(
4307 xfs_off_t end_dmi_offset
;
4308 xfs_fileoff_t endoffset_fsb
;
4310 xfs_fsblock_t firstfsb
;
4311 xfs_bmap_free_t free_list
;
4313 xfs_bmbt_irec_t imap
;
4321 xfs_fileoff_t startoffset_fsb
;
4323 int need_iolock
= (attr_flags
& ATTR_DMI
) == 0;
4325 vn_trace_entry(XFS_ITOV(ip
), __FUNCTION__
, (inst_t
*)__return_address
);
4328 if ((error
= XFS_QM_DQATTACH(mp
, ip
, 0)))
4332 if (len
<= 0) /* if nothing being freed */
4334 rt
= (ip
->i_d
.di_flags
& XFS_DIFLAG_REALTIME
);
4335 startoffset_fsb
= XFS_B_TO_FSB(mp
, offset
);
4336 end_dmi_offset
= offset
+ len
;
4337 endoffset_fsb
= XFS_B_TO_FSBT(mp
, end_dmi_offset
);
4339 if (offset
< ip
->i_d
.di_size
&&
4340 (attr_flags
& ATTR_DMI
) == 0 &&
4341 DM_EVENT_ENABLED(XFS_MTOVFS(mp
), ip
, DM_EVENT_WRITE
)) {
4342 if (end_dmi_offset
> ip
->i_d
.di_size
)
4343 end_dmi_offset
= ip
->i_d
.di_size
;
4344 error
= XFS_SEND_DATA(mp
, DM_EVENT_WRITE
, XFS_ITOV(ip
),
4345 offset
, end_dmi_offset
- offset
,
4346 AT_DELAY_FLAG(attr_flags
), NULL
);
4352 xfs_ilock(ip
, XFS_IOLOCK_EXCL
);
4353 rounding
= MAX((__uint8_t
)(1 << mp
->m_sb
.sb_blocklog
),
4355 ilen
= len
+ (offset
& (rounding
- 1));
4356 ioffset
= offset
& ~(rounding
- 1);
4357 if (ilen
& (rounding
- 1))
4358 ilen
= (ilen
+ rounding
) & ~(rounding
- 1);
4359 xfs_inval_cached_pages(XFS_ITOV(ip
), &(ip
->i_iocore
), ioffset
, 0, 0);
4361 * Need to zero the stuff we're not freeing, on disk.
4362 * If its a realtime file & can't use unwritten extents then we
4363 * actually need to zero the extent edges. Otherwise xfs_bunmapi
4364 * will take care of it for us.
4366 if (rt
&& !XFS_SB_VERSION_HASEXTFLGBIT(&mp
->m_sb
)) {
4368 error
= xfs_bmapi(NULL
, ip
, startoffset_fsb
, 1, 0, NULL
, 0,
4369 &imap
, &nimap
, NULL
);
4371 goto out_unlock_iolock
;
4372 ASSERT(nimap
== 0 || nimap
== 1);
4373 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
4376 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
4377 block
= imap
.br_startblock
;
4378 mod
= do_div(block
, mp
->m_sb
.sb_rextsize
);
4380 startoffset_fsb
+= mp
->m_sb
.sb_rextsize
- mod
;
4383 error
= xfs_bmapi(NULL
, ip
, endoffset_fsb
- 1, 1, 0, NULL
, 0,
4384 &imap
, &nimap
, NULL
);
4386 goto out_unlock_iolock
;
4387 ASSERT(nimap
== 0 || nimap
== 1);
4388 if (nimap
&& imap
.br_startblock
!= HOLESTARTBLOCK
) {
4389 ASSERT(imap
.br_startblock
!= DELAYSTARTBLOCK
);
4391 if (mod
&& (mod
!= mp
->m_sb
.sb_rextsize
))
4392 endoffset_fsb
-= mod
;
4395 if ((done
= (endoffset_fsb
<= startoffset_fsb
)))
4397 * One contiguous piece to clear
4399 error
= xfs_zero_remaining_bytes(ip
, offset
, offset
+ len
- 1);
4402 * Some full blocks, possibly two pieces to clear
4404 if (offset
< XFS_FSB_TO_B(mp
, startoffset_fsb
))
4405 error
= xfs_zero_remaining_bytes(ip
, offset
,
4406 XFS_FSB_TO_B(mp
, startoffset_fsb
) - 1);
4408 XFS_FSB_TO_B(mp
, endoffset_fsb
) < offset
+ len
)
4409 error
= xfs_zero_remaining_bytes(ip
,
4410 XFS_FSB_TO_B(mp
, endoffset_fsb
),
4415 * free file space until done or until there is an error
4417 resblks
= XFS_DIOSTRAT_SPACE_RES(mp
, 0);
4418 while (!error
&& !done
) {
4421 * allocate and setup the transaction
4423 tp
= xfs_trans_alloc(mp
, XFS_TRANS_DIOSTRAT
);
4424 error
= xfs_trans_reserve(tp
,
4426 XFS_WRITE_LOG_RES(mp
),
4428 XFS_TRANS_PERM_LOG_RES
,
4429 XFS_WRITE_LOG_COUNT
);
4432 * check for running out of space
4436 * Free the transaction structure.
4438 ASSERT(error
== ENOSPC
|| XFS_FORCED_SHUTDOWN(mp
));
4439 xfs_trans_cancel(tp
, 0);
4442 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
4443 error
= XFS_TRANS_RESERVE_QUOTA(mp
, tp
,
4444 ip
->i_udquot
, ip
->i_gdquot
, resblks
, 0, rt
?
4445 XFS_QMOPT_RES_RTBLKS
: XFS_QMOPT_RES_REGBLKS
);
4449 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
4450 xfs_trans_ihold(tp
, ip
);
4453 * issue the bunmapi() call to free the blocks
4455 XFS_BMAP_INIT(&free_list
, &firstfsb
);
4456 error
= xfs_bunmapi(tp
, ip
, startoffset_fsb
,
4457 endoffset_fsb
- startoffset_fsb
,
4458 0, 2, &firstfsb
, &free_list
, &done
);
4464 * complete the transaction
4466 error
= xfs_bmap_finish(&tp
, &free_list
, firstfsb
, &committed
);
4471 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
, NULL
);
4472 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4477 xfs_iunlock(ip
, XFS_IOLOCK_EXCL
);
4481 xfs_bmap_cancel(&free_list
);
4483 xfs_trans_cancel(tp
, XFS_TRANS_RELEASE_LOG_RES
| XFS_TRANS_ABORT
);
4484 xfs_iunlock(ip
, need_iolock
? (XFS_ILOCK_EXCL
| XFS_IOLOCK_EXCL
) :
4490 * xfs_change_file_space()
4491 * This routine allocates or frees disk space for the given file.
4492 * The user specified parameters are checked for alignment and size
4501 xfs_change_file_space(
4515 xfs_off_t startoffset
;
4521 vp
= BHV_TO_VNODE(bdp
);
4522 vn_trace_entry(vp
, __FUNCTION__
, (inst_t
*)__return_address
);
4524 ip
= XFS_BHVTOI(bdp
);
4528 * must be a regular file and have write permission
4530 if (vp
->v_type
!= VREG
)
4531 return XFS_ERROR(EINVAL
);
4533 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
4535 if ((error
= xfs_iaccess(ip
, S_IWUSR
, credp
))) {
4536 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
4540 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
4542 switch (bf
->l_whence
) {
4543 case 0: /*SEEK_SET*/
4545 case 1: /*SEEK_CUR*/
4546 bf
->l_start
+= offset
;
4548 case 2: /*SEEK_END*/
4549 bf
->l_start
+= ip
->i_d
.di_size
;
4552 return XFS_ERROR(EINVAL
);
4555 llen
= bf
->l_len
> 0 ? bf
->l_len
- 1 : bf
->l_len
;
4557 if ( (bf
->l_start
< 0)
4558 || (bf
->l_start
> XFS_MAXIOFFSET(mp
))
4559 || (bf
->l_start
+ llen
< 0)
4560 || (bf
->l_start
+ llen
> XFS_MAXIOFFSET(mp
)))
4561 return XFS_ERROR(EINVAL
);
4565 startoffset
= bf
->l_start
;
4566 fsize
= ip
->i_d
.di_size
;
4569 * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve
4571 * These calls do NOT zero the data space allocated to the file,
4572 * nor do they change the file size.
4574 * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file
4576 * These calls cause the new file data to be zeroed and the file
4577 * size to be changed.
4579 setprealloc
= clrprealloc
= 0;
4582 case XFS_IOC_RESVSP
:
4583 case XFS_IOC_RESVSP64
:
4584 error
= xfs_alloc_file_space(ip
, startoffset
, bf
->l_len
,
4591 case XFS_IOC_UNRESVSP
:
4592 case XFS_IOC_UNRESVSP64
:
4593 if ((error
= xfs_free_file_space(ip
, startoffset
, bf
->l_len
,
4598 case XFS_IOC_ALLOCSP
:
4599 case XFS_IOC_ALLOCSP64
:
4600 case XFS_IOC_FREESP
:
4601 case XFS_IOC_FREESP64
:
4602 if (startoffset
> fsize
) {
4603 error
= xfs_alloc_file_space(ip
, fsize
,
4604 startoffset
- fsize
, 0, attr_flags
);
4609 va
.va_mask
= XFS_AT_SIZE
;
4610 va
.va_size
= startoffset
;
4612 error
= xfs_setattr(bdp
, &va
, attr_flags
, credp
);
4622 return XFS_ERROR(EINVAL
);
4626 * update the inode timestamp, mode, and prealloc flag bits
4628 tp
= xfs_trans_alloc(mp
, XFS_TRANS_WRITEID
);
4630 if ((error
= xfs_trans_reserve(tp
, 0, XFS_WRITEID_LOG_RES(mp
),
4633 xfs_trans_cancel(tp
, 0);
4637 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
4639 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
4640 xfs_trans_ihold(tp
, ip
);
4642 if ((attr_flags
& ATTR_DMI
) == 0) {
4643 ip
->i_d
.di_mode
&= ~S_ISUID
;
4646 * Note that we don't have to worry about mandatory
4647 * file locking being disabled here because we only
4648 * clear the S_ISGID bit if the Group execute bit is
4649 * on, but if it was on then mandatory locking wouldn't
4650 * have been enabled.
4652 if (ip
->i_d
.di_mode
& S_IXGRP
)
4653 ip
->i_d
.di_mode
&= ~S_ISGID
;
4655 xfs_ichgtime(ip
, XFS_ICHGTIME_MOD
| XFS_ICHGTIME_CHG
);
4658 ip
->i_d
.di_flags
|= XFS_DIFLAG_PREALLOC
;
4659 else if (clrprealloc
)
4660 ip
->i_d
.di_flags
&= ~XFS_DIFLAG_PREALLOC
;
4662 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
4663 xfs_trans_set_sync(tp
);
4665 error
= xfs_trans_commit(tp
, 0, NULL
);
4667 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
4672 vnodeops_t xfs_vnodeops
= {
4673 BHV_IDENTITY_INIT(VN_BHV_XFS
,VNODE_POSITION_XFS
),
4674 .vop_open
= xfs_open
,
4675 .vop_read
= xfs_read
,
4676 #ifdef HAVE_SENDFILE
4677 .vop_sendfile
= xfs_sendfile
,
4679 .vop_write
= xfs_write
,
4680 .vop_ioctl
= xfs_ioctl
,
4681 .vop_getattr
= xfs_getattr
,
4682 .vop_setattr
= xfs_setattr
,
4683 .vop_access
= xfs_access
,
4684 .vop_lookup
= xfs_lookup
,
4685 .vop_create
= xfs_create
,
4686 .vop_remove
= xfs_remove
,
4687 .vop_link
= xfs_link
,
4688 .vop_rename
= xfs_rename
,
4689 .vop_mkdir
= xfs_mkdir
,
4690 .vop_rmdir
= xfs_rmdir
,
4691 .vop_readdir
= xfs_readdir
,
4692 .vop_symlink
= xfs_symlink
,
4693 .vop_readlink
= xfs_readlink
,
4694 .vop_fsync
= xfs_fsync
,
4695 .vop_inactive
= xfs_inactive
,
4696 .vop_fid2
= xfs_fid2
,
4697 .vop_rwlock
= xfs_rwlock
,
4698 .vop_rwunlock
= xfs_rwunlock
,
4699 .vop_bmap
= xfs_bmap
,
4700 .vop_reclaim
= xfs_reclaim
,
4701 .vop_attr_get
= xfs_attr_get
,
4702 .vop_attr_set
= xfs_attr_set
,
4703 .vop_attr_remove
= xfs_attr_remove
,
4704 .vop_attr_list
= xfs_attr_list
,
4705 .vop_link_removed
= (vop_link_removed_t
)fs_noval
,
4706 .vop_vnode_change
= (vop_vnode_change_t
)fs_noval
,
4707 .vop_tosspages
= fs_tosspages
,
4708 .vop_flushinval_pages
= fs_flushinval_pages
,
4709 .vop_flush_pages
= fs_flush_pages
,
4710 .vop_release
= xfs_release
,
4711 .vop_iflush
= xfs_inode_flush
,