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_format.h"
23 #include "xfs_trans.h"
26 #include "xfs_alloc.h"
27 #include "xfs_quota.h"
28 #include "xfs_mount.h"
29 #include "xfs_bmap_btree.h"
30 #include "xfs_dinode.h"
31 #include "xfs_inode.h"
33 #include "xfs_bmap_util.h"
34 #include "xfs_rtalloc.h"
35 #include "xfs_error.h"
36 #include "xfs_itable.h"
38 #include "xfs_buf_item.h"
39 #include "xfs_utils.h"
40 #include "xfs_inode_item.h"
41 #include "xfs_trace.h"
42 #include "xfs_icache.h"
43 #include "xfs_symlink.h"
45 #include <linux/capability.h>
46 #include <linux/xattr.h>
47 #include <linux/namei.h>
48 #include <linux/posix_acl.h>
49 #include <linux/security.h>
50 #include <linux/fiemap.h>
51 #include <linux/slab.h>
56 const struct xattr
*xattr_array
,
59 const struct xattr
*xattr
;
60 struct xfs_inode
*ip
= XFS_I(inode
);
63 for (xattr
= xattr_array
; xattr
->name
!= NULL
; xattr
++) {
64 error
= xfs_attr_set(ip
, xattr
->name
, xattr
->value
,
65 xattr
->value_len
, ATTR_SECURE
);
73 * Hook in SELinux. This is not quite correct yet, what we really need
74 * here (as we do for default ACLs) is a mechanism by which creation of
75 * these attrs can be journalled at inode creation time (along with the
76 * inode, of course, such that log replay can't cause these to be lost).
83 const struct qstr
*qstr
)
85 return security_inode_init_security(inode
, dir
, qstr
,
86 &xfs_initxattrs
, NULL
);
91 struct xfs_name
*namep
,
92 struct dentry
*dentry
)
94 namep
->name
= dentry
->d_name
.name
;
95 namep
->len
= dentry
->d_name
.len
;
102 struct dentry
*dentry
)
104 struct xfs_name teardown
;
107 * If we can't add the ACL or we fail in
108 * xfs_init_security we must back out.
109 * ENOSPC can hit here, among other things.
111 xfs_dentry_to_name(&teardown
, dentry
);
113 xfs_remove(XFS_I(dir
), &teardown
, XFS_I(inode
));
120 struct dentry
*dentry
,
125 struct xfs_inode
*ip
= NULL
;
126 struct posix_acl
*default_acl
= NULL
;
127 struct xfs_name name
;
131 * Irix uses Missed'em'V split, but doesn't want to see
132 * the upper 5 bits of (14bit) major.
134 if (S_ISCHR(mode
) || S_ISBLK(mode
)) {
135 if (unlikely(!sysv_valid_dev(rdev
) || MAJOR(rdev
) & ~0x1ff))
137 rdev
= sysv_encode_dev(rdev
);
142 if (IS_POSIXACL(dir
)) {
143 default_acl
= xfs_get_acl(dir
, ACL_TYPE_DEFAULT
);
144 if (IS_ERR(default_acl
))
145 return PTR_ERR(default_acl
);
148 mode
&= ~current_umask();
151 xfs_dentry_to_name(&name
, dentry
);
152 error
= xfs_create(XFS_I(dir
), &name
, mode
, rdev
, &ip
);
158 error
= xfs_init_security(inode
, dir
, &dentry
->d_name
);
160 goto out_cleanup_inode
;
163 error
= -xfs_inherit_acl(inode
, default_acl
);
166 goto out_cleanup_inode
;
170 d_instantiate(dentry
, inode
);
174 xfs_cleanup_inode(dir
, inode
, dentry
);
176 posix_acl_release(default_acl
);
183 struct dentry
*dentry
,
187 return xfs_vn_mknod(dir
, dentry
, mode
, 0);
193 struct dentry
*dentry
,
196 return xfs_vn_mknod(dir
, dentry
, mode
|S_IFDIR
, 0);
199 STATIC
struct dentry
*
202 struct dentry
*dentry
,
205 struct xfs_inode
*cip
;
206 struct xfs_name name
;
209 if (dentry
->d_name
.len
>= MAXNAMELEN
)
210 return ERR_PTR(-ENAMETOOLONG
);
212 xfs_dentry_to_name(&name
, dentry
);
213 error
= xfs_lookup(XFS_I(dir
), &name
, &cip
, NULL
);
214 if (unlikely(error
)) {
215 if (unlikely(error
!= ENOENT
))
216 return ERR_PTR(-error
);
221 return d_splice_alias(VFS_I(cip
), dentry
);
224 STATIC
struct dentry
*
227 struct dentry
*dentry
,
230 struct xfs_inode
*ip
;
231 struct xfs_name xname
;
232 struct xfs_name ci_name
;
236 if (dentry
->d_name
.len
>= MAXNAMELEN
)
237 return ERR_PTR(-ENAMETOOLONG
);
239 xfs_dentry_to_name(&xname
, dentry
);
240 error
= xfs_lookup(XFS_I(dir
), &xname
, &ip
, &ci_name
);
241 if (unlikely(error
)) {
242 if (unlikely(error
!= ENOENT
))
243 return ERR_PTR(-error
);
245 * call d_add(dentry, NULL) here when d_drop_negative_children
246 * is called in xfs_vn_mknod (ie. allow negative dentries
247 * with CI filesystems).
252 /* if exact match, just splice and exit */
254 return d_splice_alias(VFS_I(ip
), dentry
);
256 /* else case-insensitive match... */
257 dname
.name
= ci_name
.name
;
258 dname
.len
= ci_name
.len
;
259 dentry
= d_add_ci(dentry
, VFS_I(ip
), &dname
);
260 kmem_free(ci_name
.name
);
266 struct dentry
*old_dentry
,
268 struct dentry
*dentry
)
270 struct inode
*inode
= old_dentry
->d_inode
;
271 struct xfs_name name
;
274 xfs_dentry_to_name(&name
, dentry
);
276 error
= xfs_link(XFS_I(dir
), XFS_I(inode
), &name
);
281 d_instantiate(dentry
, inode
);
288 struct dentry
*dentry
)
290 struct xfs_name name
;
293 xfs_dentry_to_name(&name
, dentry
);
295 error
= -xfs_remove(XFS_I(dir
), &name
, XFS_I(dentry
->d_inode
));
300 * With unlink, the VFS makes the dentry "negative": no inode,
301 * but still hashed. This is incompatible with case-insensitive
302 * mode, so invalidate (unhash) the dentry in CI-mode.
304 if (xfs_sb_version_hasasciici(&XFS_M(dir
->i_sb
)->m_sb
))
305 d_invalidate(dentry
);
312 struct dentry
*dentry
,
316 struct xfs_inode
*cip
= NULL
;
317 struct xfs_name name
;
322 (irix_symlink_mode
? 0777 & ~current_umask() : S_IRWXUGO
);
323 xfs_dentry_to_name(&name
, dentry
);
325 error
= xfs_symlink(XFS_I(dir
), &name
, symname
, mode
, &cip
);
331 error
= xfs_init_security(inode
, dir
, &dentry
->d_name
);
333 goto out_cleanup_inode
;
335 d_instantiate(dentry
, inode
);
339 xfs_cleanup_inode(dir
, inode
, dentry
);
347 struct dentry
*odentry
,
349 struct dentry
*ndentry
)
351 struct inode
*new_inode
= ndentry
->d_inode
;
352 struct xfs_name oname
;
353 struct xfs_name nname
;
355 xfs_dentry_to_name(&oname
, odentry
);
356 xfs_dentry_to_name(&nname
, ndentry
);
358 return -xfs_rename(XFS_I(odir
), &oname
, XFS_I(odentry
->d_inode
),
359 XFS_I(ndir
), &nname
, new_inode
?
360 XFS_I(new_inode
) : NULL
);
364 * careful here - this function can get called recursively, so
365 * we need to be very careful about how much stack we use.
366 * uio is kmalloced for this reason...
370 struct dentry
*dentry
,
371 struct nameidata
*nd
)
376 link
= kmalloc(MAXPATHLEN
+1, GFP_KERNEL
);
380 error
= -xfs_readlink(XFS_I(dentry
->d_inode
), link
);
384 nd_set_link(nd
, link
);
390 nd_set_link(nd
, ERR_PTR(error
));
396 struct dentry
*dentry
,
397 struct nameidata
*nd
,
400 char *s
= nd_get_link(nd
);
408 struct vfsmount
*mnt
,
409 struct dentry
*dentry
,
412 struct inode
*inode
= dentry
->d_inode
;
413 struct xfs_inode
*ip
= XFS_I(inode
);
414 struct xfs_mount
*mp
= ip
->i_mount
;
416 trace_xfs_getattr(ip
);
418 if (XFS_FORCED_SHUTDOWN(mp
))
419 return -XFS_ERROR(EIO
);
421 stat
->size
= XFS_ISIZE(ip
);
422 stat
->dev
= inode
->i_sb
->s_dev
;
423 stat
->mode
= ip
->i_d
.di_mode
;
424 stat
->nlink
= ip
->i_d
.di_nlink
;
425 stat
->uid
= ip
->i_d
.di_uid
;
426 stat
->gid
= ip
->i_d
.di_gid
;
427 stat
->ino
= ip
->i_ino
;
428 stat
->atime
= inode
->i_atime
;
429 stat
->mtime
= inode
->i_mtime
;
430 stat
->ctime
= inode
->i_ctime
;
432 XFS_FSB_TO_BB(mp
, ip
->i_d
.di_nblocks
+ ip
->i_delayed_blks
);
435 switch (inode
->i_mode
& S_IFMT
) {
438 stat
->blksize
= BLKDEV_IOSIZE
;
439 stat
->rdev
= MKDEV(sysv_major(ip
->i_df
.if_u2
.if_rdev
) & 0x1ff,
440 sysv_minor(ip
->i_df
.if_u2
.if_rdev
));
443 if (XFS_IS_REALTIME_INODE(ip
)) {
445 * If the file blocks are being allocated from a
446 * realtime volume, then return the inode's realtime
447 * extent size or the realtime volume's extent size.
450 xfs_get_extsz_hint(ip
) << mp
->m_sb
.sb_blocklog
;
452 stat
->blksize
= xfs_preferred_iosize(mp
);
462 struct xfs_trans
*tp
,
463 struct xfs_inode
*ip
,
466 struct inode
*inode
= VFS_I(ip
);
467 umode_t mode
= iattr
->ia_mode
;
470 ASSERT(xfs_isilocked(ip
, XFS_ILOCK_EXCL
));
472 ip
->i_d
.di_mode
&= S_IFMT
;
473 ip
->i_d
.di_mode
|= mode
& ~S_IFMT
;
475 inode
->i_mode
&= S_IFMT
;
476 inode
->i_mode
|= mode
& ~S_IFMT
;
481 struct xfs_inode
*ip
,
485 xfs_mount_t
*mp
= ip
->i_mount
;
486 struct inode
*inode
= VFS_I(ip
);
487 int mask
= iattr
->ia_valid
;
490 uid_t uid
= 0, iuid
= 0;
491 gid_t gid
= 0, igid
= 0;
492 struct xfs_dquot
*udqp
= NULL
, *gdqp
= NULL
;
493 struct xfs_dquot
*olddquot1
= NULL
, *olddquot2
= NULL
;
495 trace_xfs_setattr(ip
);
497 /* If acls are being inherited, we already have this checked */
498 if (!(flags
& XFS_ATTR_NOACL
)) {
499 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
500 return XFS_ERROR(EROFS
);
502 if (XFS_FORCED_SHUTDOWN(mp
))
503 return XFS_ERROR(EIO
);
505 error
= -inode_change_ok(inode
, iattr
);
507 return XFS_ERROR(error
);
510 ASSERT((mask
& ATTR_SIZE
) == 0);
513 * If disk quotas is on, we make sure that the dquots do exist on disk,
514 * before we start any other transactions. Trying to do this later
515 * is messy. We don't care to take a readlock to look at the ids
516 * in inode here, because we can't hold it across the trans_reserve.
517 * If the IDs do change before we take the ilock, we're covered
518 * because the i_*dquot fields will get updated anyway.
520 if (XFS_IS_QUOTA_ON(mp
) && (mask
& (ATTR_UID
|ATTR_GID
))) {
523 if ((mask
& ATTR_UID
) && XFS_IS_UQUOTA_ON(mp
)) {
525 qflags
|= XFS_QMOPT_UQUOTA
;
527 uid
= ip
->i_d
.di_uid
;
529 if ((mask
& ATTR_GID
) && XFS_IS_GQUOTA_ON(mp
)) {
531 qflags
|= XFS_QMOPT_GQUOTA
;
533 gid
= ip
->i_d
.di_gid
;
537 * We take a reference when we initialize udqp and gdqp,
538 * so it is important that we never blindly double trip on
539 * the same variable. See xfs_create() for an example.
541 ASSERT(udqp
== NULL
);
542 ASSERT(gdqp
== NULL
);
543 error
= xfs_qm_vop_dqalloc(ip
, uid
, gid
, xfs_get_projid(ip
),
544 qflags
, &udqp
, &gdqp
, NULL
);
549 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
550 error
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES(mp
), 0, 0, 0);
554 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
557 * Change file ownership. Must be the owner or privileged.
559 if (mask
& (ATTR_UID
|ATTR_GID
)) {
561 * These IDs could have changed since we last looked at them.
562 * But, we're assured that if the ownership did change
563 * while we didn't have the inode locked, inode's dquot(s)
564 * would have changed also.
566 iuid
= ip
->i_d
.di_uid
;
567 igid
= ip
->i_d
.di_gid
;
568 gid
= (mask
& ATTR_GID
) ? iattr
->ia_gid
: igid
;
569 uid
= (mask
& ATTR_UID
) ? iattr
->ia_uid
: iuid
;
572 * Do a quota reservation only if uid/gid is actually
575 if (XFS_IS_QUOTA_RUNNING(mp
) &&
576 ((XFS_IS_UQUOTA_ON(mp
) && iuid
!= uid
) ||
577 (XFS_IS_GQUOTA_ON(mp
) && igid
!= gid
))) {
579 error
= xfs_qm_vop_chown_reserve(tp
, ip
, udqp
, gdqp
,
580 NULL
, capable(CAP_FOWNER
) ?
581 XFS_QMOPT_FORCE_RES
: 0);
582 if (error
) /* out of quota */
583 goto out_trans_cancel
;
587 xfs_trans_ijoin(tp
, ip
, 0);
590 * Change file ownership. Must be the owner or privileged.
592 if (mask
& (ATTR_UID
|ATTR_GID
)) {
594 * CAP_FSETID overrides the following restrictions:
596 * The set-user-ID and set-group-ID bits of a file will be
597 * cleared upon successful return from chown()
599 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
600 !capable(CAP_FSETID
))
601 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
604 * Change the ownerships and register quota modifications
605 * in the transaction.
608 if (XFS_IS_QUOTA_RUNNING(mp
) && XFS_IS_UQUOTA_ON(mp
)) {
609 ASSERT(mask
& ATTR_UID
);
611 olddquot1
= xfs_qm_vop_chown(tp
, ip
,
612 &ip
->i_udquot
, udqp
);
614 ip
->i_d
.di_uid
= uid
;
618 if (XFS_IS_QUOTA_RUNNING(mp
) && XFS_IS_GQUOTA_ON(mp
)) {
619 ASSERT(!XFS_IS_PQUOTA_ON(mp
));
620 ASSERT(mask
& ATTR_GID
);
622 olddquot2
= xfs_qm_vop_chown(tp
, ip
,
623 &ip
->i_gdquot
, gdqp
);
625 ip
->i_d
.di_gid
= gid
;
631 * Change file access modes.
633 if (mask
& ATTR_MODE
)
634 xfs_setattr_mode(tp
, ip
, iattr
);
637 * Change file access or modified times.
639 if (mask
& ATTR_ATIME
) {
640 inode
->i_atime
= iattr
->ia_atime
;
641 ip
->i_d
.di_atime
.t_sec
= iattr
->ia_atime
.tv_sec
;
642 ip
->i_d
.di_atime
.t_nsec
= iattr
->ia_atime
.tv_nsec
;
644 if (mask
& ATTR_CTIME
) {
645 inode
->i_ctime
= iattr
->ia_ctime
;
646 ip
->i_d
.di_ctime
.t_sec
= iattr
->ia_ctime
.tv_sec
;
647 ip
->i_d
.di_ctime
.t_nsec
= iattr
->ia_ctime
.tv_nsec
;
649 if (mask
& ATTR_MTIME
) {
650 inode
->i_mtime
= iattr
->ia_mtime
;
651 ip
->i_d
.di_mtime
.t_sec
= iattr
->ia_mtime
.tv_sec
;
652 ip
->i_d
.di_mtime
.t_nsec
= iattr
->ia_mtime
.tv_nsec
;
655 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
657 XFS_STATS_INC(xs_ig_attrchg
);
659 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
660 xfs_trans_set_sync(tp
);
661 error
= xfs_trans_commit(tp
, 0);
663 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
666 * Release any dquot(s) the inode had kept before chown.
668 xfs_qm_dqrele(olddquot1
);
669 xfs_qm_dqrele(olddquot2
);
674 return XFS_ERROR(error
);
677 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
678 * update. We could avoid this with linked transactions
679 * and passing down the transaction pointer all the way
680 * to attr_set. No previous user of the generic
681 * Posix ACL code seems to care about this issue either.
683 if ((mask
& ATTR_MODE
) && !(flags
& XFS_ATTR_NOACL
)) {
684 error
= -xfs_acl_chmod(inode
);
686 return XFS_ERROR(error
);
692 xfs_trans_cancel(tp
, 0);
693 xfs_iunlock(ip
, XFS_ILOCK_EXCL
);
701 * Truncate file. Must have write permission and not be a directory.
705 struct xfs_inode
*ip
,
709 struct xfs_mount
*mp
= ip
->i_mount
;
710 struct inode
*inode
= VFS_I(ip
);
711 int mask
= iattr
->ia_valid
;
712 xfs_off_t oldsize
, newsize
;
713 struct xfs_trans
*tp
;
716 uint commit_flags
= 0;
718 trace_xfs_setattr(ip
);
720 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
721 return XFS_ERROR(EROFS
);
723 if (XFS_FORCED_SHUTDOWN(mp
))
724 return XFS_ERROR(EIO
);
726 error
= -inode_change_ok(inode
, iattr
);
728 return XFS_ERROR(error
);
730 ASSERT(S_ISREG(ip
->i_d
.di_mode
));
731 ASSERT((mask
& (ATTR_UID
|ATTR_GID
|ATTR_ATIME
|ATTR_ATIME_SET
|
732 ATTR_MTIME_SET
|ATTR_KILL_PRIV
|ATTR_TIMES_SET
)) == 0);
734 if (!(flags
& XFS_ATTR_NOLOCK
)) {
735 lock_flags
|= XFS_IOLOCK_EXCL
;
736 xfs_ilock(ip
, lock_flags
);
739 oldsize
= inode
->i_size
;
740 newsize
= iattr
->ia_size
;
743 * Short circuit the truncate case for zero length files.
745 if (newsize
== 0 && oldsize
== 0 && ip
->i_d
.di_nextents
== 0) {
746 if (!(mask
& (ATTR_CTIME
|ATTR_MTIME
)))
750 * Use the regular setattr path to update the timestamps.
752 xfs_iunlock(ip
, lock_flags
);
753 iattr
->ia_valid
&= ~ATTR_SIZE
;
754 return xfs_setattr_nonsize(ip
, iattr
, 0);
758 * Make sure that the dquots are attached to the inode.
760 error
= xfs_qm_dqattach(ip
, 0);
765 * Now we can make the changes. Before we join the inode to the
766 * transaction, take care of the part of the truncation that must be
767 * done without the inode lock. This needs to be done before joining
768 * the inode to the transaction, because the inode cannot be unlocked
769 * once it is a part of the transaction.
771 if (newsize
> oldsize
) {
773 * Do the first part of growing a file: zero any data in the
774 * last block that is beyond the old EOF. We need to do this
775 * before the inode is joined to the transaction to modify
778 error
= xfs_zero_eof(ip
, newsize
, oldsize
);
784 * We are going to log the inode size change in this transaction so
785 * any previous writes that are beyond the on disk EOF and the new
786 * EOF that have not been written out need to be written here. If we
787 * do not write the data out, we expose ourselves to the null files
790 * Only flush from the on disk size to the smaller of the in memory
791 * file size or the new size as that's the range we really care about
792 * here and prevents waiting for other data not within the range we
795 if (oldsize
!= ip
->i_d
.di_size
&& newsize
> ip
->i_d
.di_size
) {
796 error
= -filemap_write_and_wait_range(VFS_I(ip
)->i_mapping
,
797 ip
->i_d
.di_size
, newsize
);
803 * Wait for all direct I/O to complete.
805 inode_dio_wait(inode
);
807 error
= -block_truncate_page(inode
->i_mapping
, newsize
, xfs_get_blocks
);
811 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_SIZE
);
812 error
= xfs_trans_reserve(tp
, 0, XFS_ITRUNCATE_LOG_RES(mp
), 0,
813 XFS_TRANS_PERM_LOG_RES
,
814 XFS_ITRUNCATE_LOG_COUNT
);
816 goto out_trans_cancel
;
818 truncate_setsize(inode
, newsize
);
820 commit_flags
= XFS_TRANS_RELEASE_LOG_RES
;
821 lock_flags
|= XFS_ILOCK_EXCL
;
823 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
825 xfs_trans_ijoin(tp
, ip
, 0);
828 * Only change the c/mtime if we are changing the size or we are
829 * explicitly asked to change it. This handles the semantic difference
830 * between truncate() and ftruncate() as implemented in the VFS.
832 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
833 * special case where we need to update the times despite not having
834 * these flags set. For all other operations the VFS set these flags
835 * explicitly if it wants a timestamp update.
837 if (newsize
!= oldsize
&& (!(mask
& (ATTR_CTIME
| ATTR_MTIME
)))) {
838 iattr
->ia_ctime
= iattr
->ia_mtime
=
839 current_fs_time(inode
->i_sb
);
840 mask
|= ATTR_CTIME
| ATTR_MTIME
;
844 * The first thing we do is set the size to new_size permanently on
845 * disk. This way we don't have to worry about anyone ever being able
846 * to look at the data being freed even in the face of a crash.
847 * What we're getting around here is the case where we free a block, it
848 * is allocated to another file, it is written to, and then we crash.
849 * If the new data gets written to the file but the log buffers
850 * containing the free and reallocation don't, then we'd end up with
851 * garbage in the blocks being freed. As long as we make the new size
852 * permanent before actually freeing any blocks it doesn't matter if
853 * they get written to.
855 ip
->i_d
.di_size
= newsize
;
856 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
858 if (newsize
<= oldsize
) {
859 error
= xfs_itruncate_extents(&tp
, ip
, XFS_DATA_FORK
, newsize
);
861 goto out_trans_abort
;
864 * Truncated "down", so we're removing references to old data
865 * here - if we delay flushing for a long time, we expose
866 * ourselves unduly to the notorious NULL files problem. So,
867 * we mark this inode and flush it when the file is closed,
868 * and do not wait the usual (long) time for writeout.
870 xfs_iflags_set(ip
, XFS_ITRUNCATED
);
872 /* A truncate down always removes post-EOF blocks. */
873 xfs_inode_clear_eofblocks_tag(ip
);
877 * Change file access modes.
879 if (mask
& ATTR_MODE
)
880 xfs_setattr_mode(tp
, ip
, iattr
);
882 if (mask
& ATTR_CTIME
) {
883 inode
->i_ctime
= iattr
->ia_ctime
;
884 ip
->i_d
.di_ctime
.t_sec
= iattr
->ia_ctime
.tv_sec
;
885 ip
->i_d
.di_ctime
.t_nsec
= iattr
->ia_ctime
.tv_nsec
;
887 if (mask
& ATTR_MTIME
) {
888 inode
->i_mtime
= iattr
->ia_mtime
;
889 ip
->i_d
.di_mtime
.t_sec
= iattr
->ia_mtime
.tv_sec
;
890 ip
->i_d
.di_mtime
.t_nsec
= iattr
->ia_mtime
.tv_nsec
;
893 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
895 XFS_STATS_INC(xs_ig_attrchg
);
897 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
898 xfs_trans_set_sync(tp
);
900 error
= xfs_trans_commit(tp
, XFS_TRANS_RELEASE_LOG_RES
);
903 xfs_iunlock(ip
, lock_flags
);
907 commit_flags
|= XFS_TRANS_ABORT
;
909 xfs_trans_cancel(tp
, commit_flags
);
915 struct dentry
*dentry
,
918 if (iattr
->ia_valid
& ATTR_SIZE
)
919 return -xfs_setattr_size(XFS_I(dentry
->d_inode
), iattr
, 0);
920 return -xfs_setattr_nonsize(XFS_I(dentry
->d_inode
), iattr
, 0);
926 struct timespec
*now
,
929 struct xfs_inode
*ip
= XFS_I(inode
);
930 struct xfs_mount
*mp
= ip
->i_mount
;
931 struct xfs_trans
*tp
;
934 trace_xfs_update_time(ip
);
936 tp
= xfs_trans_alloc(mp
, XFS_TRANS_FSYNC_TS
);
937 error
= xfs_trans_reserve(tp
, 0, XFS_FSYNC_TS_LOG_RES(mp
), 0, 0, 0);
939 xfs_trans_cancel(tp
, 0);
943 xfs_ilock(ip
, XFS_ILOCK_EXCL
);
944 if (flags
& S_CTIME
) {
945 inode
->i_ctime
= *now
;
946 ip
->i_d
.di_ctime
.t_sec
= (__int32_t
)now
->tv_sec
;
947 ip
->i_d
.di_ctime
.t_nsec
= (__int32_t
)now
->tv_nsec
;
949 if (flags
& S_MTIME
) {
950 inode
->i_mtime
= *now
;
951 ip
->i_d
.di_mtime
.t_sec
= (__int32_t
)now
->tv_sec
;
952 ip
->i_d
.di_mtime
.t_nsec
= (__int32_t
)now
->tv_nsec
;
954 if (flags
& S_ATIME
) {
955 inode
->i_atime
= *now
;
956 ip
->i_d
.di_atime
.t_sec
= (__int32_t
)now
->tv_sec
;
957 ip
->i_d
.di_atime
.t_nsec
= (__int32_t
)now
->tv_nsec
;
959 xfs_trans_ijoin(tp
, ip
, XFS_ILOCK_EXCL
);
960 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_TIMESTAMP
);
961 return -xfs_trans_commit(tp
, 0);
964 #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
967 * Call fiemap helper to fill in user data.
968 * Returns positive errors to xfs_getbmap.
973 struct getbmapx
*bmv
,
977 struct fiemap_extent_info
*fieinfo
= *arg
;
978 u32 fiemap_flags
= 0;
979 u64 logical
, physical
, length
;
981 /* Do nothing for a hole */
982 if (bmv
->bmv_block
== -1LL)
985 logical
= BBTOB(bmv
->bmv_offset
);
986 physical
= BBTOB(bmv
->bmv_block
);
987 length
= BBTOB(bmv
->bmv_length
);
989 if (bmv
->bmv_oflags
& BMV_OF_PREALLOC
)
990 fiemap_flags
|= FIEMAP_EXTENT_UNWRITTEN
;
991 else if (bmv
->bmv_oflags
& BMV_OF_DELALLOC
) {
992 fiemap_flags
|= (FIEMAP_EXTENT_DELALLOC
|
993 FIEMAP_EXTENT_UNKNOWN
);
994 physical
= 0; /* no block yet */
996 if (bmv
->bmv_oflags
& BMV_OF_LAST
)
997 fiemap_flags
|= FIEMAP_EXTENT_LAST
;
999 error
= fiemap_fill_next_extent(fieinfo
, logical
, physical
,
1000 length
, fiemap_flags
);
1003 *full
= 1; /* user array now full */
1011 struct inode
*inode
,
1012 struct fiemap_extent_info
*fieinfo
,
1016 xfs_inode_t
*ip
= XFS_I(inode
);
1020 error
= fiemap_check_flags(fieinfo
, XFS_FIEMAP_FLAGS
);
1024 /* Set up bmap header for xfs internal routine */
1025 bm
.bmv_offset
= BTOBB(start
);
1026 /* Special case for whole file */
1027 if (length
== FIEMAP_MAX_OFFSET
)
1028 bm
.bmv_length
= -1LL;
1030 bm
.bmv_length
= BTOBB(length
);
1032 /* We add one because in getbmap world count includes the header */
1033 bm
.bmv_count
= !fieinfo
->fi_extents_max
? MAXEXTNUM
:
1034 fieinfo
->fi_extents_max
+ 1;
1035 bm
.bmv_count
= min_t(__s32
, bm
.bmv_count
,
1036 (PAGE_SIZE
* 16 / sizeof(struct getbmapx
)));
1037 bm
.bmv_iflags
= BMV_IF_PREALLOC
| BMV_IF_NO_HOLES
;
1038 if (fieinfo
->fi_flags
& FIEMAP_FLAG_XATTR
)
1039 bm
.bmv_iflags
|= BMV_IF_ATTRFORK
;
1040 if (!(fieinfo
->fi_flags
& FIEMAP_FLAG_SYNC
))
1041 bm
.bmv_iflags
|= BMV_IF_DELALLOC
;
1043 error
= xfs_getbmap(ip
, &bm
, xfs_fiemap_format
, fieinfo
);
1050 static const struct inode_operations xfs_inode_operations
= {
1051 .get_acl
= xfs_get_acl
,
1052 .getattr
= xfs_vn_getattr
,
1053 .setattr
= xfs_vn_setattr
,
1054 .setxattr
= generic_setxattr
,
1055 .getxattr
= generic_getxattr
,
1056 .removexattr
= generic_removexattr
,
1057 .listxattr
= xfs_vn_listxattr
,
1058 .fiemap
= xfs_vn_fiemap
,
1059 .update_time
= xfs_vn_update_time
,
1062 static const struct inode_operations xfs_dir_inode_operations
= {
1063 .create
= xfs_vn_create
,
1064 .lookup
= xfs_vn_lookup
,
1065 .link
= xfs_vn_link
,
1066 .unlink
= xfs_vn_unlink
,
1067 .symlink
= xfs_vn_symlink
,
1068 .mkdir
= xfs_vn_mkdir
,
1070 * Yes, XFS uses the same method for rmdir and unlink.
1072 * There are some subtile differences deeper in the code,
1073 * but we use S_ISDIR to check for those.
1075 .rmdir
= xfs_vn_unlink
,
1076 .mknod
= xfs_vn_mknod
,
1077 .rename
= xfs_vn_rename
,
1078 .get_acl
= xfs_get_acl
,
1079 .getattr
= xfs_vn_getattr
,
1080 .setattr
= xfs_vn_setattr
,
1081 .setxattr
= generic_setxattr
,
1082 .getxattr
= generic_getxattr
,
1083 .removexattr
= generic_removexattr
,
1084 .listxattr
= xfs_vn_listxattr
,
1085 .update_time
= xfs_vn_update_time
,
1088 static const struct inode_operations xfs_dir_ci_inode_operations
= {
1089 .create
= xfs_vn_create
,
1090 .lookup
= xfs_vn_ci_lookup
,
1091 .link
= xfs_vn_link
,
1092 .unlink
= xfs_vn_unlink
,
1093 .symlink
= xfs_vn_symlink
,
1094 .mkdir
= xfs_vn_mkdir
,
1096 * Yes, XFS uses the same method for rmdir and unlink.
1098 * There are some subtile differences deeper in the code,
1099 * but we use S_ISDIR to check for those.
1101 .rmdir
= xfs_vn_unlink
,
1102 .mknod
= xfs_vn_mknod
,
1103 .rename
= xfs_vn_rename
,
1104 .get_acl
= xfs_get_acl
,
1105 .getattr
= xfs_vn_getattr
,
1106 .setattr
= xfs_vn_setattr
,
1107 .setxattr
= generic_setxattr
,
1108 .getxattr
= generic_getxattr
,
1109 .removexattr
= generic_removexattr
,
1110 .listxattr
= xfs_vn_listxattr
,
1111 .update_time
= xfs_vn_update_time
,
1114 static const struct inode_operations xfs_symlink_inode_operations
= {
1115 .readlink
= generic_readlink
,
1116 .follow_link
= xfs_vn_follow_link
,
1117 .put_link
= xfs_vn_put_link
,
1118 .get_acl
= xfs_get_acl
,
1119 .getattr
= xfs_vn_getattr
,
1120 .setattr
= xfs_vn_setattr
,
1121 .setxattr
= generic_setxattr
,
1122 .getxattr
= generic_getxattr
,
1123 .removexattr
= generic_removexattr
,
1124 .listxattr
= xfs_vn_listxattr
,
1125 .update_time
= xfs_vn_update_time
,
1129 xfs_diflags_to_iflags(
1130 struct inode
*inode
,
1131 struct xfs_inode
*ip
)
1133 if (ip
->i_d
.di_flags
& XFS_DIFLAG_IMMUTABLE
)
1134 inode
->i_flags
|= S_IMMUTABLE
;
1136 inode
->i_flags
&= ~S_IMMUTABLE
;
1137 if (ip
->i_d
.di_flags
& XFS_DIFLAG_APPEND
)
1138 inode
->i_flags
|= S_APPEND
;
1140 inode
->i_flags
&= ~S_APPEND
;
1141 if (ip
->i_d
.di_flags
& XFS_DIFLAG_SYNC
)
1142 inode
->i_flags
|= S_SYNC
;
1144 inode
->i_flags
&= ~S_SYNC
;
1145 if (ip
->i_d
.di_flags
& XFS_DIFLAG_NOATIME
)
1146 inode
->i_flags
|= S_NOATIME
;
1148 inode
->i_flags
&= ~S_NOATIME
;
1152 * Initialize the Linux inode, set up the operation vectors and
1155 * When reading existing inodes from disk this is called directly
1156 * from xfs_iget, when creating a new inode it is called from
1157 * xfs_ialloc after setting up the inode.
1159 * We are always called with an uninitialised linux inode here.
1160 * We need to initialise the necessary fields and take a reference
1165 struct xfs_inode
*ip
)
1167 struct inode
*inode
= &ip
->i_vnode
;
1169 inode
->i_ino
= ip
->i_ino
;
1170 inode
->i_state
= I_NEW
;
1172 inode_sb_list_add(inode
);
1173 /* make the inode look hashed for the writeback code */
1174 hlist_add_fake(&inode
->i_hash
);
1176 inode
->i_mode
= ip
->i_d
.di_mode
;
1177 set_nlink(inode
, ip
->i_d
.di_nlink
);
1178 inode
->i_uid
= ip
->i_d
.di_uid
;
1179 inode
->i_gid
= ip
->i_d
.di_gid
;
1181 switch (inode
->i_mode
& S_IFMT
) {
1185 MKDEV(sysv_major(ip
->i_df
.if_u2
.if_rdev
) & 0x1ff,
1186 sysv_minor(ip
->i_df
.if_u2
.if_rdev
));
1193 inode
->i_generation
= ip
->i_d
.di_gen
;
1194 i_size_write(inode
, ip
->i_d
.di_size
);
1195 inode
->i_atime
.tv_sec
= ip
->i_d
.di_atime
.t_sec
;
1196 inode
->i_atime
.tv_nsec
= ip
->i_d
.di_atime
.t_nsec
;
1197 inode
->i_mtime
.tv_sec
= ip
->i_d
.di_mtime
.t_sec
;
1198 inode
->i_mtime
.tv_nsec
= ip
->i_d
.di_mtime
.t_nsec
;
1199 inode
->i_ctime
.tv_sec
= ip
->i_d
.di_ctime
.t_sec
;
1200 inode
->i_ctime
.tv_nsec
= ip
->i_d
.di_ctime
.t_nsec
;
1201 xfs_diflags_to_iflags(inode
, ip
);
1203 switch (inode
->i_mode
& S_IFMT
) {
1205 inode
->i_op
= &xfs_inode_operations
;
1206 inode
->i_fop
= &xfs_file_operations
;
1207 inode
->i_mapping
->a_ops
= &xfs_address_space_operations
;
1210 if (xfs_sb_version_hasasciici(&XFS_M(inode
->i_sb
)->m_sb
))
1211 inode
->i_op
= &xfs_dir_ci_inode_operations
;
1213 inode
->i_op
= &xfs_dir_inode_operations
;
1214 inode
->i_fop
= &xfs_dir_file_operations
;
1217 inode
->i_op
= &xfs_symlink_inode_operations
;
1218 if (!(ip
->i_df
.if_flags
& XFS_IFINLINE
))
1219 inode
->i_mapping
->a_ops
= &xfs_address_space_operations
;
1222 inode
->i_op
= &xfs_inode_operations
;
1223 init_special_inode(inode
, inode
->i_mode
, inode
->i_rdev
);
1228 * If there is no attribute fork no ACL can exist on this inode,
1229 * and it can't have any file capabilities attached to it either.
1231 if (!XFS_IFORK_Q(ip
)) {
1232 inode_has_no_xattr(inode
);
1233 cache_no_acl(inode
);
1236 xfs_iflags_clear(ip
, XFS_INEW
);
1239 unlock_new_inode(inode
);