2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_mount.h"
25 #include "xfs_da_format.h"
26 #include "xfs_inode.h"
28 #include "xfs_bmap_util.h"
30 #include "xfs_quota.h"
31 #include "xfs_error.h"
33 #include "xfs_trans.h"
34 #include "xfs_trace.h"
35 #include "xfs_icache.h"
36 #include "xfs_symlink.h"
37 #include "xfs_da_btree.h"
39 #include "xfs_trans_space.h"
42 #include <linux/capability.h>
43 #include <linux/xattr.h>
44 #include <linux/namei.h>
45 #include <linux/posix_acl.h>
46 #include <linux/security.h>
47 #include <linux/fiemap.h>
48 #include <linux/slab.h>
51 * Directories have different lock order w.r.t. mmap_sem compared to regular
52 * files. This is due to readdir potentially triggering page faults on a user
53 * buffer inside filldir(), and this happens with the ilock on the directory
54 * held. For regular files, the lock order is the other way around - the
55 * mmap_sem is taken during the page fault, and then we lock the ilock to do
56 * block mapping. Hence we need a different class for the directory ilock so
57 * that lockdep can tell them apart.
59 static struct lock_class_key xfs_nondir_ilock_class
;
60 static struct lock_class_key xfs_dir_ilock_class
;
65 const struct xattr
*xattr_array
,
68 const struct xattr
*xattr
;
69 struct xfs_inode
*ip
= XFS_I(inode
);
72 for (xattr
= xattr_array
; xattr
->name
!= NULL
; xattr
++) {
73 error
= xfs_attr_set(ip
, xattr
->name
, xattr
->value
,
74 xattr
->value_len
, ATTR_SECURE
);
82 * Hook in SELinux. This is not quite correct yet, what we really need
83 * here (as we do for default ACLs) is a mechanism by which creation of
84 * these attrs can be journalled at inode creation time (along with the
85 * inode, of course, such that log replay can't cause these to be lost).
92 const struct qstr
*qstr
)
94 return security_inode_init_security(inode
, dir
, qstr
,
95 &xfs_initxattrs
, NULL
);
100 struct xfs_name
*namep
,
101 struct dentry
*dentry
,
104 namep
->name
= dentry
->d_name
.name
;
105 namep
->len
= dentry
->d_name
.len
;
106 namep
->type
= xfs_mode_to_ftype
[(mode
& S_IFMT
) >> S_SHIFT
];
113 struct dentry
*dentry
)
115 struct xfs_name teardown
;
118 * If we can't add the ACL or we fail in
119 * xfs_init_security we must back out.
120 * ENOSPC can hit here, among other things.
122 xfs_dentry_to_name(&teardown
, dentry
, 0);
124 xfs_remove(XFS_I(dir
), &teardown
, XFS_I(inode
));
130 struct dentry
*dentry
,
133 bool tmpfile
) /* unnamed file */
136 struct xfs_inode
*ip
= NULL
;
137 struct posix_acl
*default_acl
, *acl
;
138 struct xfs_name name
;
142 * Irix uses Missed'em'V split, but doesn't want to see
143 * the upper 5 bits of (14bit) major.
145 if (S_ISCHR(mode
) || S_ISBLK(mode
)) {
146 if (unlikely(!sysv_valid_dev(rdev
) || MAJOR(rdev
) & ~0x1ff))
148 rdev
= sysv_encode_dev(rdev
);
153 error
= posix_acl_create(dir
, &mode
, &default_acl
, &acl
);
158 xfs_dentry_to_name(&name
, dentry
, mode
);
159 error
= xfs_create(XFS_I(dir
), &name
, mode
, rdev
, &ip
);
161 error
= xfs_create_tmpfile(XFS_I(dir
), dentry
, mode
, &ip
);
168 error
= xfs_init_security(inode
, dir
, &dentry
->d_name
);
170 goto out_cleanup_inode
;
172 #ifdef CONFIG_XFS_POSIX_ACL
174 error
= xfs_set_acl(inode
, default_acl
, ACL_TYPE_DEFAULT
);
176 goto out_cleanup_inode
;
179 error
= xfs_set_acl(inode
, acl
, ACL_TYPE_ACCESS
);
181 goto out_cleanup_inode
;
186 d_tmpfile(dentry
, inode
);
188 d_instantiate(dentry
, inode
);
190 xfs_finish_inode_setup(ip
);
194 posix_acl_release(default_acl
);
196 posix_acl_release(acl
);
200 xfs_finish_inode_setup(ip
);
202 xfs_cleanup_inode(dir
, inode
, dentry
);
210 struct dentry
*dentry
,
214 return xfs_generic_create(dir
, dentry
, mode
, rdev
, false);
220 struct dentry
*dentry
,
224 return xfs_vn_mknod(dir
, dentry
, mode
, 0);
230 struct dentry
*dentry
,
233 return xfs_vn_mknod(dir
, dentry
, mode
|S_IFDIR
, 0);
236 STATIC
struct dentry
*
239 struct dentry
*dentry
,
242 struct xfs_inode
*cip
;
243 struct xfs_name name
;
246 if (dentry
->d_name
.len
>= MAXNAMELEN
)
247 return ERR_PTR(-ENAMETOOLONG
);
249 xfs_dentry_to_name(&name
, dentry
, 0);
250 error
= xfs_lookup(XFS_I(dir
), &name
, &cip
, NULL
);
251 if (unlikely(error
)) {
252 if (unlikely(error
!= -ENOENT
))
253 return ERR_PTR(error
);
258 return d_splice_alias(VFS_I(cip
), dentry
);
261 STATIC
struct dentry
*
264 struct dentry
*dentry
,
267 struct xfs_inode
*ip
;
268 struct xfs_name xname
;
269 struct xfs_name ci_name
;
273 if (dentry
->d_name
.len
>= MAXNAMELEN
)
274 return ERR_PTR(-ENAMETOOLONG
);
276 xfs_dentry_to_name(&xname
, dentry
, 0);
277 error
= xfs_lookup(XFS_I(dir
), &xname
, &ip
, &ci_name
);
278 if (unlikely(error
)) {
279 if (unlikely(error
!= -ENOENT
))
280 return ERR_PTR(error
);
282 * call d_add(dentry, NULL) here when d_drop_negative_children
283 * is called in xfs_vn_mknod (ie. allow negative dentries
284 * with CI filesystems).
289 /* if exact match, just splice and exit */
291 return d_splice_alias(VFS_I(ip
), dentry
);
293 /* else case-insensitive match... */
294 dname
.name
= ci_name
.name
;
295 dname
.len
= ci_name
.len
;
296 dentry
= d_add_ci(dentry
, VFS_I(ip
), &dname
);
297 kmem_free(ci_name
.name
);
303 struct dentry
*old_dentry
,
305 struct dentry
*dentry
)
307 struct inode
*inode
= d_inode(old_dentry
);
308 struct xfs_name name
;
311 xfs_dentry_to_name(&name
, dentry
, inode
->i_mode
);
313 error
= xfs_link(XFS_I(dir
), XFS_I(inode
), &name
);
318 d_instantiate(dentry
, inode
);
325 struct dentry
*dentry
)
327 struct xfs_name name
;
330 xfs_dentry_to_name(&name
, dentry
, 0);
332 error
= xfs_remove(XFS_I(dir
), &name
, XFS_I(d_inode(dentry
)));
337 * With unlink, the VFS makes the dentry "negative": no inode,
338 * but still hashed. This is incompatible with case-insensitive
339 * mode, so invalidate (unhash) the dentry in CI-mode.
341 if (xfs_sb_version_hasasciici(&XFS_M(dir
->i_sb
)->m_sb
))
342 d_invalidate(dentry
);
349 struct dentry
*dentry
,
353 struct xfs_inode
*cip
= NULL
;
354 struct xfs_name name
;
359 (irix_symlink_mode
? 0777 & ~current_umask() : S_IRWXUGO
);
360 xfs_dentry_to_name(&name
, dentry
, mode
);
362 error
= xfs_symlink(XFS_I(dir
), &name
, symname
, mode
, &cip
);
368 error
= xfs_init_security(inode
, dir
, &dentry
->d_name
);
370 goto out_cleanup_inode
;
372 d_instantiate(dentry
, inode
);
373 xfs_finish_inode_setup(cip
);
377 xfs_finish_inode_setup(cip
);
378 xfs_cleanup_inode(dir
, inode
, dentry
);
387 struct dentry
*odentry
,
389 struct dentry
*ndentry
,
392 struct inode
*new_inode
= d_inode(ndentry
);
394 struct xfs_name oname
;
395 struct xfs_name nname
;
397 if (flags
& ~(RENAME_NOREPLACE
| RENAME_EXCHANGE
| RENAME_WHITEOUT
))
400 /* if we are exchanging files, we need to set i_mode of both files */
401 if (flags
& RENAME_EXCHANGE
)
402 omode
= d_inode(ndentry
)->i_mode
;
404 xfs_dentry_to_name(&oname
, odentry
, omode
);
405 xfs_dentry_to_name(&nname
, ndentry
, d_inode(odentry
)->i_mode
);
407 return xfs_rename(XFS_I(odir
), &oname
, XFS_I(d_inode(odentry
)),
409 new_inode
? XFS_I(new_inode
) : NULL
, flags
);
413 * careful here - this function can get called recursively, so
414 * we need to be very careful about how much stack we use.
415 * uio is kmalloced for this reason...
419 struct dentry
*dentry
,
420 struct nameidata
*nd
)
425 link
= kmalloc(MAXPATHLEN
+1, GFP_KERNEL
);
429 error
= xfs_readlink(XFS_I(d_inode(dentry
)), link
);
433 nd_set_link(nd
, link
);
439 nd_set_link(nd
, ERR_PTR(error
));
445 struct vfsmount
*mnt
,
446 struct dentry
*dentry
,
449 struct inode
*inode
= d_inode(dentry
);
450 struct xfs_inode
*ip
= XFS_I(inode
);
451 struct xfs_mount
*mp
= ip
->i_mount
;
453 trace_xfs_getattr(ip
);
455 if (XFS_FORCED_SHUTDOWN(mp
))
458 stat
->size
= XFS_ISIZE(ip
);
459 stat
->dev
= inode
->i_sb
->s_dev
;
460 stat
->mode
= ip
->i_d
.di_mode
;
461 stat
->nlink
= ip
->i_d
.di_nlink
;
462 stat
->uid
= inode
->i_uid
;
463 stat
->gid
= inode
->i_gid
;
464 stat
->ino
= ip
->i_ino
;
465 stat
->atime
= inode
->i_atime
;
466 stat
->mtime
= inode
->i_mtime
;
467 stat
->ctime
= inode
->i_ctime
;
469 XFS_FSB_TO_BB(mp
, ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
472 switch (inode
->i_mode
& S_IFMT
) {
475 stat
->blksize
= BLKDEV_IOSIZE
;
476 stat
->rdev
= MKDEV(sysv_major(ip
->i_df
.if_u2
.if_rdev
) & 0x1ff,
477 sysv_minor(ip
->i_df
.if_u2
.if_rdev
));
480 if (XFS_IS_REALTIME_INODE(ip
)) {
482 * If the file blocks are being allocated from a
483 * realtime volume, then return the inode's realtime
484 * extent size or the realtime volume's extent size.
487 xfs_get_extsz_hint(ip
) << mp
->m_sb
.sb_blocklog
;
489 stat
->blksize
= xfs_preferred_iosize(mp
);
499 struct xfs_inode
*ip
,
502 struct inode
*inode
= VFS_I(ip
);
503 umode_t mode
= iattr
->ia_mode
;
505 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
507 ip
->i_d
.di_mode
&= S_IFMT
;
508 ip
->i_d
.di_mode
|= mode
& ~S_IFMT
;
510 inode
->i_mode
&= S_IFMT
;
511 inode
->i_mode
|= mode
& ~S_IFMT
;
516 struct xfs_inode
*ip
,
519 struct inode
*inode
= VFS_I(ip
);
521 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
523 if (iattr
->ia_valid
& ATTR_ATIME
) {
524 inode
->i_atime
= iattr
->ia_atime
;
525 ip
->i_d
.di_atime
.t_sec
= iattr
->ia_atime
.tv_sec
;
526 ip
->i_d
.di_atime
.t_nsec
= iattr
->ia_atime
.tv_nsec
;
528 if (iattr
->ia_valid
& ATTR_CTIME
) {
529 inode
->i_ctime
= iattr
->ia_ctime
;
530 ip
->i_d
.di_ctime
.t_sec
= iattr
->ia_ctime
.tv_sec
;
531 ip
->i_d
.di_ctime
.t_nsec
= iattr
->ia_ctime
.tv_nsec
;
533 if (iattr
->ia_valid
& ATTR_MTIME
) {
534 inode
->i_mtime
= iattr
->ia_mtime
;
535 ip
->i_d
.di_mtime
.t_sec
= iattr
->ia_mtime
.tv_sec
;
536 ip
->i_d
.di_mtime
.t_nsec
= iattr
->ia_mtime
.tv_nsec
;
542 struct xfs_inode
*ip
,
546 xfs_mount_t
*mp
= ip
->i_mount
;
547 struct inode
*inode
= VFS_I(ip
);
548 int mask
= iattr
->ia_valid
;
551 kuid_t uid
= GLOBAL_ROOT_UID
, iuid
= GLOBAL_ROOT_UID
;
552 kgid_t gid
= GLOBAL_ROOT_GID
, igid
= GLOBAL_ROOT_GID
;
553 struct xfs_dquot
*udqp
= NULL
, *gdqp
= NULL
;
554 struct xfs_dquot
*olddquot1
= NULL
, *olddquot2
= NULL
;
556 trace_xfs_setattr(ip
);
558 /* If acls are being inherited, we already have this checked */
559 if (!(flags
& XFS_ATTR_NOACL
)) {
560 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
563 if (XFS_FORCED_SHUTDOWN(mp
))
566 error
= inode_change_ok(inode
, iattr
);
571 ASSERT((mask
& ATTR_SIZE
) == 0);
574 * If disk quotas is on, we make sure that the dquots do exist on disk,
575 * before we start any other transactions. Trying to do this later
576 * is messy. We don't care to take a readlock to look at the ids
577 * in inode here, because we can't hold it across the trans_reserve.
578 * If the IDs do change before we take the ilock, we're covered
579 * because the i_*dquot fields will get updated anyway.
581 if (XFS_IS_QUOTA_ON(mp
) && (mask
& (ATTR_UID
|ATTR_GID
))) {
584 if ((mask
& ATTR_UID
) && XFS_IS_UQUOTA_ON(mp
)) {
586 qflags
|= XFS_QMOPT_UQUOTA
;
590 if ((mask
& ATTR_GID
) && XFS_IS_GQUOTA_ON(mp
)) {
592 qflags
|= XFS_QMOPT_GQUOTA
;
598 * We take a reference when we initialize udqp and gdqp,
599 * so it is important that we never blindly double trip on
600 * the same variable. See xfs_create() for an example.
602 ASSERT(udqp
== NULL
);
603 ASSERT(gdqp
== NULL
);
604 error
= xfs_qm_vop_dqalloc(ip
, xfs_kuid_to_uid(uid
),
605 xfs_kgid_to_gid(gid
),
607 qflags
, &udqp
, &gdqp
, NULL
);
612 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
613 error
= xfs_trans_reserve(tp
, &M_RES(mp
)->tr_ichange
, 0, 0);
617 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
620 * Change file ownership. Must be the owner or privileged.
622 if (mask
& (ATTR_UID
|ATTR_GID
)) {
624 * These IDs could have changed since we last looked at them.
625 * But, we're assured that if the ownership did change
626 * while we didn't have the inode locked, inode's dquot(s)
627 * would have changed also.
631 gid
= (mask
& ATTR_GID
) ? iattr
->ia_gid
: igid
;
632 uid
= (mask
& ATTR_UID
) ? iattr
->ia_uid
: iuid
;
635 * Do a quota reservation only if uid/gid is actually
638 if (XFS_IS_QUOTA_RUNNING(mp
) &&
639 ((XFS_IS_UQUOTA_ON(mp
) && !uid_eq(iuid
, uid
)) ||
640 (XFS_IS_GQUOTA_ON(mp
) && !gid_eq(igid
, gid
)))) {
642 error
= xfs_qm_vop_chown_reserve(tp
, ip
, udqp
, gdqp
,
643 NULL
, capable(CAP_FOWNER
) ?
644 XFS_QMOPT_FORCE_RES
: 0);
645 if (error
) /* out of quota */
646 goto out_trans_cancel
;
650 xfs_trans_ijoin(tp
, ip
, 0);
653 * Change file ownership. Must be the owner or privileged.
655 if (mask
& (ATTR_UID
|ATTR_GID
)) {
657 * CAP_FSETID overrides the following restrictions:
659 * The set-user-ID and set-group-ID bits of a file will be
660 * cleared upon successful return from chown()
662 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
663 !capable(CAP_FSETID
))
664 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
667 * Change the ownerships and register quota modifications
668 * in the transaction.
670 if (!uid_eq(iuid
, uid
)) {
671 if (XFS_IS_QUOTA_RUNNING(mp
) && XFS_IS_UQUOTA_ON(mp
)) {
672 ASSERT(mask
& ATTR_UID
);
674 olddquot1
= xfs_qm_vop_chown(tp
, ip
,
675 &ip
->i_udquot
, udqp
);
677 ip
->i_d
.di_uid
= xfs_kuid_to_uid(uid
);
680 if (!gid_eq(igid
, gid
)) {
681 if (XFS_IS_QUOTA_RUNNING(mp
) && XFS_IS_GQUOTA_ON(mp
)) {
682 ASSERT(xfs_sb_version_has_pquotino(&mp
->m_sb
) ||
683 !XFS_IS_PQUOTA_ON(mp
));
684 ASSERT(mask
& ATTR_GID
);
686 olddquot2
= xfs_qm_vop_chown(tp
, ip
,
687 &ip
->i_gdquot
, gdqp
);
689 ip
->i_d
.di_gid
= xfs_kgid_to_gid(gid
);
694 if (mask
& ATTR_MODE
)
695 xfs_setattr_mode(ip
, iattr
);
696 if (mask
& (ATTR_ATIME
|ATTR_CTIME
|ATTR_MTIME
))
697 xfs_setattr_time(ip
, iattr
);
699 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
701 XFS_STATS_INC(xs_ig_attrchg
);
703 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
704 xfs_trans_set_sync(tp
);
705 error
= xfs_trans_commit(tp
, 0);
707 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
710 * Release any dquot(s) the inode had kept before chown.
712 xfs_qm_dqrele(olddquot1
);
713 xfs_qm_dqrele(olddquot2
);
721 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
722 * update. We could avoid this with linked transactions
723 * and passing down the transaction pointer all the way
724 * to attr_set. No previous user of the generic
725 * Posix ACL code seems to care about this issue either.
727 if ((mask
& ATTR_MODE
) && !(flags
& XFS_ATTR_NOACL
)) {
728 error
= posix_acl_chmod(inode
, inode
->i_mode
);
736 xfs_trans_cancel(tp
, 0);
737 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
745 * Truncate file. Must have write permission and not be a directory.
749 struct xfs_inode
*ip
,
752 struct xfs_mount
*mp
= ip
->i_mount
;
753 struct inode
*inode
= VFS_I(ip
);
754 xfs_off_t oldsize
, newsize
;
755 struct xfs_trans
*tp
;
758 uint commit_flags
= 0;
759 bool did_zeroing
= false;
761 trace_xfs_setattr(ip
);
763 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
766 if (XFS_FORCED_SHUTDOWN(mp
))
769 error
= inode_change_ok(inode
, iattr
);
773 ASSERT(xfs_isilocked(ip
, XFS_IOLOCK_EXCL
));
774 ASSERT(xfs_isilocked(ip
, XFS_MMAPLOCK_EXCL
));
775 ASSERT(S_ISREG(ip
->i_d
.di_mode
));
776 ASSERT((iattr
->ia_valid
& (ATTR_UID
|ATTR_GID
|ATTR_ATIME
|ATTR_ATIME_SET
|
777 ATTR_MTIME_SET
|ATTR_KILL_PRIV
|ATTR_TIMES_SET
)) == 0);
779 oldsize
= inode
->i_size
;
780 newsize
= iattr
->ia_size
;
783 * Short circuit the truncate case for zero length files.
785 if (newsize
== 0 && oldsize
== 0 && ip
->i_d
.di_nextents
== 0) {
786 if (!(iattr
->ia_valid
& (ATTR_CTIME
|ATTR_MTIME
)))
790 * Use the regular setattr path to update the timestamps.
792 iattr
->ia_valid
&= ~ATTR_SIZE
;
793 return xfs_setattr_nonsize(ip
, iattr
, 0);
797 * Make sure that the dquots are attached to the inode.
799 error
= xfs_qm_dqattach(ip
, 0);
804 * File data changes must be complete before we start the transaction to
805 * modify the inode. This needs to be done before joining the inode to
806 * the transaction because the inode cannot be unlocked once it is a
807 * part of the transaction.
809 * Start with zeroing any data block beyond EOF that we may expose on
812 if (newsize
> oldsize
) {
813 error
= xfs_zero_eof(ip
, newsize
, oldsize
, &did_zeroing
);
819 * We are going to log the inode size change in this transaction so
820 * any previous writes that are beyond the on disk EOF and the new
821 * EOF that have not been written out need to be written here. If we
822 * do not write the data out, we expose ourselves to the null files
823 * problem. Note that this includes any block zeroing we did above;
824 * otherwise those blocks may not be zeroed after a crash.
826 if (newsize
> ip
->i_d
.di_size
&&
827 (oldsize
!= ip
->i_d
.di_size
|| did_zeroing
)) {
828 error
= filemap_write_and_wait_range(VFS_I(ip
)->i_mapping
,
829 ip
->i_d
.di_size
, newsize
);
834 /* Now wait for all direct I/O to complete. */
835 inode_dio_wait(inode
);
838 * We've already locked out new page faults, so now we can safely remove
839 * pages from the page cache knowing they won't get refaulted until we
840 * drop the XFS_MMAP_EXCL lock after the extent manipulations are
841 * complete. The truncate_setsize() call also cleans partial EOF page
842 * PTEs on extending truncates and hence ensures sub-page block size
843 * filesystems are correctly handled, too.
845 * We have to do all the page cache truncate work outside the
846 * transaction context as the "lock" order is page lock->log space
847 * reservation as defined by extent allocation in the writeback path.
848 * Hence a truncate can fail with ENOMEM from xfs_trans_reserve(), but
849 * having already truncated the in-memory version of the file (i.e. made
850 * user visible changes). There's not much we can do about this, except
851 * to hope that the caller sees ENOMEM and retries the truncate
854 error
= block_truncate_page(inode
->i_mapping
, newsize
, xfs_get_blocks
);
857 truncate_setsize(inode
, newsize
);
859 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_SIZE
);
860 error
= xfs_trans_reserve(tp
, &M_RES(mp
)->tr_itruncate
, 0, 0);
862 goto out_trans_cancel
;
864 commit_flags
= XFS_TRANS_RELEASE_LOG_RES
;
865 lock_flags
|= XFS_ILOCK_EXCL
;
866 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
867 xfs_trans_ijoin(tp
, ip
, 0);
870 * Only change the c/mtime if we are changing the size or we are
871 * explicitly asked to change it. This handles the semantic difference
872 * between truncate() and ftruncate() as implemented in the VFS.
874 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
875 * special case where we need to update the times despite not having
876 * these flags set. For all other operations the VFS set these flags
877 * explicitly if it wants a timestamp update.
879 if (newsize
!= oldsize
&&
880 !(iattr
->ia_valid
& (ATTR_CTIME
| ATTR_MTIME
))) {
881 iattr
->ia_ctime
= iattr
->ia_mtime
=
882 current_fs_time(inode
->i_sb
);
883 iattr
->ia_valid
|= ATTR_CTIME
| ATTR_MTIME
;
887 * The first thing we do is set the size to new_size permanently on
888 * disk. This way we don't have to worry about anyone ever being able
889 * to look at the data being freed even in the face of a crash.
890 * What we're getting around here is the case where we free a block, it
891 * is allocated to another file, it is written to, and then we crash.
892 * If the new data gets written to the file but the log buffers
893 * containing the free and reallocation don't, then we'd end up with
894 * garbage in the blocks being freed. As long as we make the new size
895 * permanent before actually freeing any blocks it doesn't matter if
896 * they get written to.
898 ip
->i_d
.di_size
= newsize
;
899 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
901 if (newsize
<= oldsize
) {
902 error
= xfs_itruncate_extents(&tp
, ip
, XFS_DATA_FORK
, newsize
);
904 goto out_trans_abort
;
907 * Truncated "down", so we're removing references to old data
908 * here - if we delay flushing for a long time, we expose
909 * ourselves unduly to the notorious NULL files problem. So,
910 * we mark this inode and flush it when the file is closed,
911 * and do not wait the usual (long) time for writeout.
913 xfs_iflags_set(ip
, XFS_ITRUNCATED
);
915 /* A truncate down always removes post-EOF blocks. */
916 xfs_inode_clear_eofblocks_tag(ip
);
919 if (iattr
->ia_valid
& ATTR_MODE
)
920 xfs_setattr_mode(ip
, iattr
);
921 if (iattr
->ia_valid
& (ATTR_ATIME
|ATTR_CTIME
|ATTR_MTIME
))
922 xfs_setattr_time(ip
, iattr
);
924 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
926 XFS_STATS_INC(xs_ig_attrchg
);
928 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
929 xfs_trans_set_sync(tp
);
931 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
934 xfs_iunlock(ip
, lock_flags
);
938 commit_flags
|= XFS_TRANS_ABORT
;
940 xfs_trans_cancel(tp
, commit_flags
);
946 struct dentry
*dentry
,
949 struct xfs_inode
*ip
= XFS_I(d_inode(dentry
));
952 if (iattr
->ia_valid
& ATTR_SIZE
) {
953 uint iolock
= XFS_IOLOCK_EXCL
;
955 xfs_ilock(ip
, iolock
);
956 error
= xfs_break_layouts(d_inode(dentry
), &iolock
, true);
958 xfs_ilock(ip
, XFS_MMAPLOCK_EXCL
);
959 iolock
|= XFS_MMAPLOCK_EXCL
;
961 error
= xfs_setattr_size(ip
, iattr
);
963 xfs_iunlock(ip
, iolock
);
965 error
= xfs_setattr_nonsize(ip
, iattr
, 0);
974 struct timespec
*now
,
977 struct xfs_inode
*ip
= XFS_I(inode
);
978 struct xfs_mount
*mp
= ip
->i_mount
;
979 struct xfs_trans
*tp
;
982 trace_xfs_update_time(ip
);
984 tp
= xfs_trans_alloc(mp
, XFS_TRANS_FSYNC_TS
);
985 error
= xfs_trans_reserve(tp
, &M_RES(mp
)->tr_fsyncts
, 0, 0);
987 xfs_trans_cancel(tp
, 0);
991 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
992 if (flags
& S_CTIME
) {
993 inode
->i_ctime
= *now
;
994 ip
->i_d
.di_ctime
.t_sec
= (__int32_t
)now
->tv_sec
;
995 ip
->i_d
.di_ctime
.t_nsec
= (__int32_t
)now
->tv_nsec
;
997 if (flags
& S_MTIME
) {
998 inode
->i_mtime
= *now
;
999 ip
->i_d
.di_mtime
.t_sec
= (__int32_t
)now
->tv_sec
;
1000 ip
->i_d
.di_mtime
.t_nsec
= (__int32_t
)now
->tv_nsec
;
1002 if (flags
& S_ATIME
) {
1003 inode
->i_atime
= *now
;
1004 ip
->i_d
.di_atime
.t_sec
= (__int32_t
)now
->tv_sec
;
1005 ip
->i_d
.di_atime
.t_nsec
= (__int32_t
)now
->tv_nsec
;
1007 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
1008 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_TIMESTAMP
);
1009 return xfs_trans_commit(tp
, 0);
1012 #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
1015 * Call fiemap helper to fill in user data.
1016 * Returns positive errors to xfs_getbmap.
1021 struct getbmapx
*bmv
,
1025 struct fiemap_extent_info
*fieinfo
= *arg
;
1026 u32 fiemap_flags
= 0;
1027 u64 logical
, physical
, length
;
1029 /* Do nothing for a hole */
1030 if (bmv
->bmv_block
== -1LL)
1033 logical
= BBTOB(bmv
->bmv_offset
);
1034 physical
= BBTOB(bmv
->bmv_block
);
1035 length
= BBTOB(bmv
->bmv_length
);
1037 if (bmv
->bmv_oflags
& BMV_OF_PREALLOC
)
1038 fiemap_flags
|= FIEMAP_EXTENT_UNWRITTEN
;
1039 else if (bmv
->bmv_oflags
& BMV_OF_DELALLOC
) {
1040 fiemap_flags
|= (FIEMAP_EXTENT_DELALLOC
|
1041 FIEMAP_EXTENT_UNKNOWN
);
1042 physical
= 0; /* no block yet */
1044 if (bmv
->bmv_oflags
& BMV_OF_LAST
)
1045 fiemap_flags
|= FIEMAP_EXTENT_LAST
;
1047 error
= fiemap_fill_next_extent(fieinfo
, logical
, physical
,
1048 length
, fiemap_flags
);
1051 *full
= 1; /* user array now full */
1059 struct inode
*inode
,
1060 struct fiemap_extent_info
*fieinfo
,
1064 xfs_inode_t
*ip
= XFS_I(inode
);
1068 error
= fiemap_check_flags(fieinfo
, XFS_FIEMAP_FLAGS
);
1072 /* Set up bmap header for xfs internal routine */
1073 bm
.bmv_offset
= BTOBBT(start
);
1074 /* Special case for whole file */
1075 if (length
== FIEMAP_MAX_OFFSET
)
1076 bm
.bmv_length
= -1LL;
1078 bm
.bmv_length
= BTOBB(start
+ length
) - bm
.bmv_offset
;
1080 /* We add one because in getbmap world count includes the header */
1081 bm
.bmv_count
= !fieinfo
->fi_extents_max
? MAXEXTNUM
:
1082 fieinfo
->fi_extents_max
+ 1;
1083 bm
.bmv_count
= min_t(__s32
, bm
.bmv_count
,
1084 (PAGE_SIZE
* 16 / sizeof(struct getbmapx
)));
1085 bm
.bmv_iflags
= BMV_IF_PREALLOC
| BMV_IF_NO_HOLES
;
1086 if (fieinfo
->fi_flags
& FIEMAP_FLAG_XATTR
)
1087 bm
.bmv_iflags
|= BMV_IF_ATTRFORK
;
1088 if (!(fieinfo
->fi_flags
& FIEMAP_FLAG_SYNC
))
1089 bm
.bmv_iflags
|= BMV_IF_DELALLOC
;
1091 error
= xfs_getbmap(ip
, &bm
, xfs_fiemap_format
, fieinfo
);
1101 struct dentry
*dentry
,
1104 return xfs_generic_create(dir
, dentry
, mode
, 0, true);
1107 static const struct inode_operations xfs_inode_operations
= {
1108 .get_acl
= xfs_get_acl
,
1109 .set_acl
= xfs_set_acl
,
1110 .getattr
= xfs_vn_getattr
,
1111 .setattr
= xfs_vn_setattr
,
1112 .setxattr
= generic_setxattr
,
1113 .getxattr
= generic_getxattr
,
1114 .removexattr
= generic_removexattr
,
1115 .listxattr
= xfs_vn_listxattr
,
1116 .fiemap
= xfs_vn_fiemap
,
1117 .update_time
= xfs_vn_update_time
,
1120 static const struct inode_operations xfs_dir_inode_operations
= {
1121 .create
= xfs_vn_create
,
1122 .lookup
= xfs_vn_lookup
,
1123 .link
= xfs_vn_link
,
1124 .unlink
= xfs_vn_unlink
,
1125 .symlink
= xfs_vn_symlink
,
1126 .mkdir
= xfs_vn_mkdir
,
1128 * Yes, XFS uses the same method for rmdir and unlink.
1130 * There are some subtile differences deeper in the code,
1131 * but we use S_ISDIR to check for those.
1133 .rmdir
= xfs_vn_unlink
,
1134 .mknod
= xfs_vn_mknod
,
1135 .rename2
= xfs_vn_rename
,
1136 .get_acl
= xfs_get_acl
,
1137 .set_acl
= xfs_set_acl
,
1138 .getattr
= xfs_vn_getattr
,
1139 .setattr
= xfs_vn_setattr
,
1140 .setxattr
= generic_setxattr
,
1141 .getxattr
= generic_getxattr
,
1142 .removexattr
= generic_removexattr
,
1143 .listxattr
= xfs_vn_listxattr
,
1144 .update_time
= xfs_vn_update_time
,
1145 .tmpfile
= xfs_vn_tmpfile
,
1148 static const struct inode_operations xfs_dir_ci_inode_operations
= {
1149 .create
= xfs_vn_create
,
1150 .lookup
= xfs_vn_ci_lookup
,
1151 .link
= xfs_vn_link
,
1152 .unlink
= xfs_vn_unlink
,
1153 .symlink
= xfs_vn_symlink
,
1154 .mkdir
= xfs_vn_mkdir
,
1156 * Yes, XFS uses the same method for rmdir and unlink.
1158 * There are some subtile differences deeper in the code,
1159 * but we use S_ISDIR to check for those.
1161 .rmdir
= xfs_vn_unlink
,
1162 .mknod
= xfs_vn_mknod
,
1163 .rename2
= xfs_vn_rename
,
1164 .get_acl
= xfs_get_acl
,
1165 .set_acl
= xfs_set_acl
,
1166 .getattr
= xfs_vn_getattr
,
1167 .setattr
= xfs_vn_setattr
,
1168 .setxattr
= generic_setxattr
,
1169 .getxattr
= generic_getxattr
,
1170 .removexattr
= generic_removexattr
,
1171 .listxattr
= xfs_vn_listxattr
,
1172 .update_time
= xfs_vn_update_time
,
1173 .tmpfile
= xfs_vn_tmpfile
,
1176 static const struct inode_operations xfs_symlink_inode_operations
= {
1177 .readlink
= generic_readlink
,
1178 .follow_link
= xfs_vn_follow_link
,
1179 .put_link
= kfree_put_link
,
1180 .getattr
= xfs_vn_getattr
,
1181 .setattr
= xfs_vn_setattr
,
1182 .setxattr
= generic_setxattr
,
1183 .getxattr
= generic_getxattr
,
1184 .removexattr
= generic_removexattr
,
1185 .listxattr
= xfs_vn_listxattr
,
1186 .update_time
= xfs_vn_update_time
,
1190 xfs_diflags_to_iflags(
1191 struct inode
*inode
,
1192 struct xfs_inode
*ip
)
1194 if (ip
->i_d
.di_flags
& XFS_DIFLAG_IMMUTABLE
)
1195 inode
->i_flags
|= S_IMMUTABLE
;
1197 inode
->i_flags
&= ~S_IMMUTABLE
;
1198 if (ip
->i_d
.di_flags
& XFS_DIFLAG_APPEND
)
1199 inode
->i_flags
|= S_APPEND
;
1201 inode
->i_flags
&= ~S_APPEND
;
1202 if (ip
->i_d
.di_flags
& XFS_DIFLAG_SYNC
)
1203 inode
->i_flags
|= S_SYNC
;
1205 inode
->i_flags
&= ~S_SYNC
;
1206 if (ip
->i_d
.di_flags
& XFS_DIFLAG_NOATIME
)
1207 inode
->i_flags
|= S_NOATIME
;
1209 inode
->i_flags
&= ~S_NOATIME
;
1213 * Initialize the Linux inode and set up the operation vectors.
1215 * When reading existing inodes from disk this is called directly from xfs_iget,
1216 * when creating a new inode it is called from xfs_ialloc after setting up the
1217 * inode. These callers have different criteria for clearing XFS_INEW, so leave
1218 * it up to the caller to deal with unlocking the inode appropriately.
1222 struct xfs_inode
*ip
)
1224 struct inode
*inode
= &ip
->i_vnode
;
1227 inode
->i_ino
= ip
->i_ino
;
1228 inode
->i_state
= I_NEW
;
1230 inode_sb_list_add(inode
);
1231 /* make the inode look hashed for the writeback code */
1232 hlist_add_fake(&inode
->i_hash
);
1234 inode
->i_mode
= ip
->i_d
.di_mode
;
1235 set_nlink(inode
, ip
->i_d
.di_nlink
);
1236 inode
->i_uid
= xfs_uid_to_kuid(ip
->i_d
.di_uid
);
1237 inode
->i_gid
= xfs_gid_to_kgid(ip
->i_d
.di_gid
);
1239 switch (inode
->i_mode
& S_IFMT
) {
1243 MKDEV(sysv_major(ip
->i_df
.if_u2
.if_rdev
) & 0x1ff,
1244 sysv_minor(ip
->i_df
.if_u2
.if_rdev
));
1251 inode
->i_generation
= ip
->i_d
.di_gen
;
1252 i_size_write(inode
, ip
->i_d
.di_size
);
1253 inode
->i_atime
.tv_sec
= ip
->i_d
.di_atime
.t_sec
;
1254 inode
->i_atime
.tv_nsec
= ip
->i_d
.di_atime
.t_nsec
;
1255 inode
->i_mtime
.tv_sec
= ip
->i_d
.di_mtime
.t_sec
;
1256 inode
->i_mtime
.tv_nsec
= ip
->i_d
.di_mtime
.t_nsec
;
1257 inode
->i_ctime
.tv_sec
= ip
->i_d
.di_ctime
.t_sec
;
1258 inode
->i_ctime
.tv_nsec
= ip
->i_d
.di_ctime
.t_nsec
;
1259 xfs_diflags_to_iflags(inode
, ip
);
1261 ip
->d_ops
= ip
->i_mount
->m_nondir_inode_ops
;
1262 lockdep_set_class(&ip
->i_lock
.mr_lock
, &xfs_nondir_ilock_class
);
1263 switch (inode
->i_mode
& S_IFMT
) {
1265 inode
->i_op
= &xfs_inode_operations
;
1266 inode
->i_fop
= &xfs_file_operations
;
1267 inode
->i_mapping
->a_ops
= &xfs_address_space_operations
;
1270 lockdep_set_class(&ip
->i_lock
.mr_lock
, &xfs_dir_ilock_class
);
1271 if (xfs_sb_version_hasasciici(&XFS_M(inode
->i_sb
)->m_sb
))
1272 inode
->i_op
= &xfs_dir_ci_inode_operations
;
1274 inode
->i_op
= &xfs_dir_inode_operations
;
1275 inode
->i_fop
= &xfs_dir_file_operations
;
1276 ip
->d_ops
= ip
->i_mount
->m_dir_inode_ops
;
1279 inode
->i_op
= &xfs_symlink_inode_operations
;
1280 if (!(ip
->i_df
.if_flags
& XFS_IFINLINE
))
1281 inode
->i_mapping
->a_ops
= &xfs_address_space_operations
;
1284 inode
->i_op
= &xfs_inode_operations
;
1285 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
1290 * Ensure all page cache allocations are done from GFP_NOFS context to
1291 * prevent direct reclaim recursion back into the filesystem and blowing
1292 * stacks or deadlocking.
1294 gfp_mask
= mapping_gfp_mask(inode
->i_mapping
);
1295 mapping_set_gfp_mask(inode
->i_mapping
, (gfp_mask
& ~(__GFP_FS
)));
1298 * If there is no attribute fork no ACL can exist on this inode,
1299 * and it can't have any file capabilities attached to it either.
1301 if (!XFS_IFORK_Q(ip
)) {
1302 inode_has_no_xattr(inode
);
1303 cache_no_acl(inode
);