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/posix_acl.h>
45 #include <linux/security.h>
46 #include <linux/fiemap.h>
47 #include <linux/slab.h>
50 * Directories have different lock order w.r.t. mmap_sem compared to regular
51 * files. This is due to readdir potentially triggering page faults on a user
52 * buffer inside filldir(), and this happens with the ilock on the directory
53 * held. For regular files, the lock order is the other way around - the
54 * mmap_sem is taken during the page fault, and then we lock the ilock to do
55 * block mapping. Hence we need a different class for the directory ilock so
56 * that lockdep can tell them apart.
58 static struct lock_class_key xfs_nondir_ilock_class;
59 static struct lock_class_key xfs_dir_ilock_class;
64 const struct xattr *xattr_array,
67 const struct xattr *xattr;
68 struct xfs_inode *ip = XFS_I(inode);
71 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
72 error = xfs_attr_set(ip, xattr->name, xattr->value,
73 xattr->value_len, ATTR_SECURE);
81 * Hook in SELinux. This is not quite correct yet, what we really need
82 * here (as we do for default ACLs) is a mechanism by which creation of
83 * these attrs can be journalled at inode creation time (along with the
84 * inode, of course, such that log replay can't cause these to be lost).
91 const struct qstr *qstr)
93 return security_inode_init_security(inode, dir, qstr,
94 &xfs_initxattrs, NULL);
99 struct xfs_name *namep,
100 struct dentry *dentry,
103 namep->name = dentry->d_name.name;
104 namep->len = dentry->d_name.len;
105 namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT];
112 struct dentry *dentry)
114 struct xfs_name teardown;
117 * If we can't add the ACL or we fail in
118 * xfs_init_security we must back out.
119 * ENOSPC can hit here, among other things.
121 xfs_dentry_to_name(&teardown, dentry, 0);
123 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
129 struct dentry *dentry,
132 bool tmpfile) /* unnamed file */
135 struct xfs_inode *ip = NULL;
136 struct posix_acl *default_acl, *acl;
137 struct xfs_name name;
141 * Irix uses Missed'em'V split, but doesn't want to see
142 * the upper 5 bits of (14bit) major.
144 if (S_ISCHR(mode) || S_ISBLK(mode)) {
145 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
147 rdev = sysv_encode_dev(rdev);
152 error = posix_acl_create(dir, &mode, &default_acl, &acl);
157 xfs_dentry_to_name(&name, dentry, mode);
158 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
160 error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip);
167 error = xfs_init_security(inode, dir, &dentry->d_name);
169 goto out_cleanup_inode;
171 #ifdef CONFIG_XFS_POSIX_ACL
173 error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
175 goto out_cleanup_inode;
178 error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
180 goto out_cleanup_inode;
185 d_tmpfile(dentry, inode);
187 d_instantiate(dentry, inode);
189 xfs_finish_inode_setup(ip);
193 posix_acl_release(default_acl);
195 posix_acl_release(acl);
199 xfs_finish_inode_setup(ip);
201 xfs_cleanup_inode(dir, inode, dentry);
209 struct dentry *dentry,
213 return xfs_generic_create(dir, dentry, mode, rdev, false);
219 struct dentry *dentry,
223 return xfs_vn_mknod(dir, dentry, mode, 0);
229 struct dentry *dentry,
232 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
235 STATIC struct dentry *
238 struct dentry *dentry,
241 struct xfs_inode *cip;
242 struct xfs_name name;
245 if (dentry->d_name.len >= MAXNAMELEN)
246 return ERR_PTR(-ENAMETOOLONG);
248 xfs_dentry_to_name(&name, dentry, 0);
249 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
250 if (unlikely(error)) {
251 if (unlikely(error != -ENOENT))
252 return ERR_PTR(error);
257 return d_splice_alias(VFS_I(cip), dentry);
260 STATIC struct dentry *
263 struct dentry *dentry,
266 struct xfs_inode *ip;
267 struct xfs_name xname;
268 struct xfs_name ci_name;
272 if (dentry->d_name.len >= MAXNAMELEN)
273 return ERR_PTR(-ENAMETOOLONG);
275 xfs_dentry_to_name(&xname, dentry, 0);
276 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
277 if (unlikely(error)) {
278 if (unlikely(error != -ENOENT))
279 return ERR_PTR(error);
281 * call d_add(dentry, NULL) here when d_drop_negative_children
282 * is called in xfs_vn_mknod (ie. allow negative dentries
283 * with CI filesystems).
288 /* if exact match, just splice and exit */
290 return d_splice_alias(VFS_I(ip), dentry);
292 /* else case-insensitive match... */
293 dname.name = ci_name.name;
294 dname.len = ci_name.len;
295 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
296 kmem_free(ci_name.name);
302 struct dentry *old_dentry,
304 struct dentry *dentry)
306 struct inode *inode = d_inode(old_dentry);
307 struct xfs_name name;
310 xfs_dentry_to_name(&name, dentry, inode->i_mode);
312 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
317 d_instantiate(dentry, inode);
324 struct dentry *dentry)
326 struct xfs_name name;
329 xfs_dentry_to_name(&name, dentry, 0);
331 error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry)));
336 * With unlink, the VFS makes the dentry "negative": no inode,
337 * but still hashed. This is incompatible with case-insensitive
338 * mode, so invalidate (unhash) the dentry in CI-mode.
340 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
341 d_invalidate(dentry);
348 struct dentry *dentry,
352 struct xfs_inode *cip = NULL;
353 struct xfs_name name;
358 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
359 xfs_dentry_to_name(&name, dentry, mode);
361 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
367 error = xfs_init_security(inode, dir, &dentry->d_name);
369 goto out_cleanup_inode;
371 d_instantiate(dentry, inode);
372 xfs_finish_inode_setup(cip);
376 xfs_finish_inode_setup(cip);
377 xfs_cleanup_inode(dir, inode, dentry);
386 struct dentry *odentry,
388 struct dentry *ndentry,
391 struct inode *new_inode = d_inode(ndentry);
393 struct xfs_name oname;
394 struct xfs_name nname;
396 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
399 /* if we are exchanging files, we need to set i_mode of both files */
400 if (flags & RENAME_EXCHANGE)
401 omode = d_inode(ndentry)->i_mode;
403 xfs_dentry_to_name(&oname, odentry, omode);
404 xfs_dentry_to_name(&nname, ndentry, d_inode(odentry)->i_mode);
406 return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)),
408 new_inode ? XFS_I(new_inode) : NULL, flags);
412 * careful here - this function can get called recursively, so
413 * we need to be very careful about how much stack we use.
414 * uio is kmalloced for this reason...
418 struct dentry *dentry,
420 struct delayed_call *done)
426 return ERR_PTR(-ECHILD);
428 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
432 error = xfs_readlink(XFS_I(d_inode(dentry)), link);
436 set_delayed_call(done, kfree_link, link);
442 return ERR_PTR(error);
447 struct vfsmount *mnt,
448 struct dentry *dentry,
451 struct inode *inode = d_inode(dentry);
452 struct xfs_inode *ip = XFS_I(inode);
453 struct xfs_mount *mp = ip->i_mount;
455 trace_xfs_getattr(ip);
457 if (XFS_FORCED_SHUTDOWN(mp))
460 stat->size = XFS_ISIZE(ip);
461 stat->dev = inode->i_sb->s_dev;
462 stat->mode = inode->i_mode;
463 stat->nlink = inode->i_nlink;
464 stat->uid = inode->i_uid;
465 stat->gid = inode->i_gid;
466 stat->ino = ip->i_ino;
467 stat->atime = inode->i_atime;
468 stat->mtime = inode->i_mtime;
469 stat->ctime = inode->i_ctime;
471 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
474 switch (inode->i_mode & S_IFMT) {
477 stat->blksize = BLKDEV_IOSIZE;
478 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
479 sysv_minor(ip->i_df.if_u2.if_rdev));
482 if (XFS_IS_REALTIME_INODE(ip)) {
484 * If the file blocks are being allocated from a
485 * realtime volume, then return the inode's realtime
486 * extent size or the realtime volume's extent size.
489 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
491 stat->blksize = xfs_preferred_iosize(mp);
501 struct xfs_inode *ip,
504 struct inode *inode = VFS_I(ip);
505 umode_t mode = iattr->ia_mode;
507 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
509 inode->i_mode &= S_IFMT;
510 inode->i_mode |= mode & ~S_IFMT;
515 struct xfs_inode *ip,
518 struct inode *inode = VFS_I(ip);
520 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
522 if (iattr->ia_valid & ATTR_ATIME)
523 inode->i_atime = iattr->ia_atime;
524 if (iattr->ia_valid & ATTR_CTIME)
525 inode->i_ctime = iattr->ia_ctime;
526 if (iattr->ia_valid & ATTR_MTIME)
527 inode->i_mtime = iattr->ia_mtime;
532 struct xfs_inode *ip,
536 xfs_mount_t *mp = ip->i_mount;
537 struct inode *inode = VFS_I(ip);
538 int mask = iattr->ia_valid;
541 kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
542 kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
543 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
544 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
546 trace_xfs_setattr(ip);
548 /* If acls are being inherited, we already have this checked */
549 if (!(flags & XFS_ATTR_NOACL)) {
550 if (mp->m_flags & XFS_MOUNT_RDONLY)
553 if (XFS_FORCED_SHUTDOWN(mp))
556 error = inode_change_ok(inode, iattr);
561 ASSERT((mask & ATTR_SIZE) == 0);
564 * If disk quotas is on, we make sure that the dquots do exist on disk,
565 * before we start any other transactions. Trying to do this later
566 * is messy. We don't care to take a readlock to look at the ids
567 * in inode here, because we can't hold it across the trans_reserve.
568 * If the IDs do change before we take the ilock, we're covered
569 * because the i_*dquot fields will get updated anyway.
571 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
574 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
576 qflags |= XFS_QMOPT_UQUOTA;
580 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
582 qflags |= XFS_QMOPT_GQUOTA;
588 * We take a reference when we initialize udqp and gdqp,
589 * so it is important that we never blindly double trip on
590 * the same variable. See xfs_create() for an example.
592 ASSERT(udqp == NULL);
593 ASSERT(gdqp == NULL);
594 error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid),
595 xfs_kgid_to_gid(gid),
597 qflags, &udqp, &gdqp, NULL);
602 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
603 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
605 goto out_trans_cancel;
607 xfs_ilock(ip, XFS_ILOCK_EXCL);
610 * Change file ownership. Must be the owner or privileged.
612 if (mask & (ATTR_UID|ATTR_GID)) {
614 * These IDs could have changed since we last looked at them.
615 * But, we're assured that if the ownership did change
616 * while we didn't have the inode locked, inode's dquot(s)
617 * would have changed also.
621 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
622 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
625 * Do a quota reservation only if uid/gid is actually
628 if (XFS_IS_QUOTA_RUNNING(mp) &&
629 ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
630 (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
632 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
633 NULL, capable(CAP_FOWNER) ?
634 XFS_QMOPT_FORCE_RES : 0);
635 if (error) /* out of quota */
640 xfs_trans_ijoin(tp, ip, 0);
643 * Change file ownership. Must be the owner or privileged.
645 if (mask & (ATTR_UID|ATTR_GID)) {
647 * CAP_FSETID overrides the following restrictions:
649 * The set-user-ID and set-group-ID bits of a file will be
650 * cleared upon successful return from chown()
652 if ((inode->i_mode & (S_ISUID|S_ISGID)) &&
653 !capable(CAP_FSETID))
654 inode->i_mode &= ~(S_ISUID|S_ISGID);
657 * Change the ownerships and register quota modifications
658 * in the transaction.
660 if (!uid_eq(iuid, uid)) {
661 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
662 ASSERT(mask & ATTR_UID);
664 olddquot1 = xfs_qm_vop_chown(tp, ip,
665 &ip->i_udquot, udqp);
667 ip->i_d.di_uid = xfs_kuid_to_uid(uid);
670 if (!gid_eq(igid, gid)) {
671 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
672 ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
673 !XFS_IS_PQUOTA_ON(mp));
674 ASSERT(mask & ATTR_GID);
676 olddquot2 = xfs_qm_vop_chown(tp, ip,
677 &ip->i_gdquot, gdqp);
679 ip->i_d.di_gid = xfs_kgid_to_gid(gid);
684 if (mask & ATTR_MODE)
685 xfs_setattr_mode(ip, iattr);
686 if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
687 xfs_setattr_time(ip, iattr);
689 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
691 XFS_STATS_INC(mp, xs_ig_attrchg);
693 if (mp->m_flags & XFS_MOUNT_WSYNC)
694 xfs_trans_set_sync(tp);
695 error = xfs_trans_commit(tp);
697 xfs_iunlock(ip, XFS_ILOCK_EXCL);
700 * Release any dquot(s) the inode had kept before chown.
702 xfs_qm_dqrele(olddquot1);
703 xfs_qm_dqrele(olddquot2);
711 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
712 * update. We could avoid this with linked transactions
713 * and passing down the transaction pointer all the way
714 * to attr_set. No previous user of the generic
715 * Posix ACL code seems to care about this issue either.
717 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
718 error = posix_acl_chmod(inode, inode->i_mode);
726 xfs_iunlock(ip, XFS_ILOCK_EXCL);
728 xfs_trans_cancel(tp);
735 * Truncate file. Must have write permission and not be a directory.
739 struct xfs_inode *ip,
742 struct xfs_mount *mp = ip->i_mount;
743 struct inode *inode = VFS_I(ip);
744 xfs_off_t oldsize, newsize;
745 struct xfs_trans *tp;
748 bool did_zeroing = false;
750 trace_xfs_setattr(ip);
752 if (mp->m_flags & XFS_MOUNT_RDONLY)
755 if (XFS_FORCED_SHUTDOWN(mp))
758 error = inode_change_ok(inode, iattr);
762 ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
763 ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
764 ASSERT(S_ISREG(inode->i_mode));
765 ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
766 ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
768 oldsize = inode->i_size;
769 newsize = iattr->ia_size;
772 * Short circuit the truncate case for zero length files.
774 if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
775 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
779 * Use the regular setattr path to update the timestamps.
781 iattr->ia_valid &= ~ATTR_SIZE;
782 return xfs_setattr_nonsize(ip, iattr, 0);
786 * Make sure that the dquots are attached to the inode.
788 error = xfs_qm_dqattach(ip, 0);
793 * File data changes must be complete before we start the transaction to
794 * modify the inode. This needs to be done before joining the inode to
795 * the transaction because the inode cannot be unlocked once it is a
796 * part of the transaction.
798 * Start with zeroing any data block beyond EOF that we may expose on
801 if (newsize > oldsize) {
802 error = xfs_zero_eof(ip, newsize, oldsize, &did_zeroing);
808 * We are going to log the inode size change in this transaction so
809 * any previous writes that are beyond the on disk EOF and the new
810 * EOF that have not been written out need to be written here. If we
811 * do not write the data out, we expose ourselves to the null files
812 * problem. Note that this includes any block zeroing we did above;
813 * otherwise those blocks may not be zeroed after a crash.
815 if (newsize > ip->i_d.di_size &&
816 (oldsize != ip->i_d.di_size || did_zeroing)) {
817 error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
818 ip->i_d.di_size, newsize);
823 /* Now wait for all direct I/O to complete. */
824 inode_dio_wait(inode);
827 * We've already locked out new page faults, so now we can safely remove
828 * pages from the page cache knowing they won't get refaulted until we
829 * drop the XFS_MMAP_EXCL lock after the extent manipulations are
830 * complete. The truncate_setsize() call also cleans partial EOF page
831 * PTEs on extending truncates and hence ensures sub-page block size
832 * filesystems are correctly handled, too.
834 * We have to do all the page cache truncate work outside the
835 * transaction context as the "lock" order is page lock->log space
836 * reservation as defined by extent allocation in the writeback path.
837 * Hence a truncate can fail with ENOMEM from xfs_trans_reserve(), but
838 * having already truncated the in-memory version of the file (i.e. made
839 * user visible changes). There's not much we can do about this, except
840 * to hope that the caller sees ENOMEM and retries the truncate
844 error = dax_truncate_page(inode, newsize, xfs_get_blocks_direct);
846 error = block_truncate_page(inode->i_mapping, newsize,
850 truncate_setsize(inode, newsize);
852 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
853 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
855 goto out_trans_cancel;
857 lock_flags |= XFS_ILOCK_EXCL;
858 xfs_ilock(ip, XFS_ILOCK_EXCL);
859 xfs_trans_ijoin(tp, ip, 0);
862 * Only change the c/mtime if we are changing the size or we are
863 * explicitly asked to change it. This handles the semantic difference
864 * between truncate() and ftruncate() as implemented in the VFS.
866 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
867 * special case where we need to update the times despite not having
868 * these flags set. For all other operations the VFS set these flags
869 * explicitly if it wants a timestamp update.
871 if (newsize != oldsize &&
872 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
873 iattr->ia_ctime = iattr->ia_mtime =
874 current_fs_time(inode->i_sb);
875 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
879 * The first thing we do is set the size to new_size permanently on
880 * disk. This way we don't have to worry about anyone ever being able
881 * to look at the data being freed even in the face of a crash.
882 * What we're getting around here is the case where we free a block, it
883 * is allocated to another file, it is written to, and then we crash.
884 * If the new data gets written to the file but the log buffers
885 * containing the free and reallocation don't, then we'd end up with
886 * garbage in the blocks being freed. As long as we make the new size
887 * permanent before actually freeing any blocks it doesn't matter if
888 * they get written to.
890 ip->i_d.di_size = newsize;
891 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
893 if (newsize <= oldsize) {
894 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
896 goto out_trans_cancel;
899 * Truncated "down", so we're removing references to old data
900 * here - if we delay flushing for a long time, we expose
901 * ourselves unduly to the notorious NULL files problem. So,
902 * we mark this inode and flush it when the file is closed,
903 * and do not wait the usual (long) time for writeout.
905 xfs_iflags_set(ip, XFS_ITRUNCATED);
907 /* A truncate down always removes post-EOF blocks. */
908 xfs_inode_clear_eofblocks_tag(ip);
911 if (iattr->ia_valid & ATTR_MODE)
912 xfs_setattr_mode(ip, iattr);
913 if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
914 xfs_setattr_time(ip, iattr);
916 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
918 XFS_STATS_INC(mp, xs_ig_attrchg);
920 if (mp->m_flags & XFS_MOUNT_WSYNC)
921 xfs_trans_set_sync(tp);
923 error = xfs_trans_commit(tp);
926 xfs_iunlock(ip, lock_flags);
930 xfs_trans_cancel(tp);
936 struct dentry *dentry,
939 struct xfs_inode *ip = XFS_I(d_inode(dentry));
942 if (iattr->ia_valid & ATTR_SIZE) {
943 uint iolock = XFS_IOLOCK_EXCL;
945 xfs_ilock(ip, iolock);
946 error = xfs_break_layouts(d_inode(dentry), &iolock, true);
948 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
949 iolock |= XFS_MMAPLOCK_EXCL;
951 error = xfs_setattr_size(ip, iattr);
953 xfs_iunlock(ip, iolock);
955 error = xfs_setattr_nonsize(ip, iattr, 0);
964 struct timespec *now,
967 struct xfs_inode *ip = XFS_I(inode);
968 struct xfs_mount *mp = ip->i_mount;
969 struct xfs_trans *tp;
972 trace_xfs_update_time(ip);
974 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
975 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0);
977 xfs_trans_cancel(tp);
981 xfs_ilock(ip, XFS_ILOCK_EXCL);
983 inode->i_ctime = *now;
985 inode->i_mtime = *now;
987 inode->i_atime = *now;
989 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
990 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
991 return xfs_trans_commit(tp);
994 #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
997 * Call fiemap helper to fill in user data.
998 * Returns positive errors to xfs_getbmap.
1003 struct getbmapx *bmv,
1007 struct fiemap_extent_info *fieinfo = *arg;
1008 u32 fiemap_flags = 0;
1009 u64 logical, physical, length;
1011 /* Do nothing for a hole */
1012 if (bmv->bmv_block == -1LL)
1015 logical = BBTOB(bmv->bmv_offset);
1016 physical = BBTOB(bmv->bmv_block);
1017 length = BBTOB(bmv->bmv_length);
1019 if (bmv->bmv_oflags & BMV_OF_PREALLOC)
1020 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
1021 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
1022 fiemap_flags |= (FIEMAP_EXTENT_DELALLOC |
1023 FIEMAP_EXTENT_UNKNOWN);
1024 physical = 0; /* no block yet */
1026 if (bmv->bmv_oflags & BMV_OF_LAST)
1027 fiemap_flags |= FIEMAP_EXTENT_LAST;
1029 error = fiemap_fill_next_extent(fieinfo, logical, physical,
1030 length, fiemap_flags);
1033 *full = 1; /* user array now full */
1041 struct inode *inode,
1042 struct fiemap_extent_info *fieinfo,
1046 xfs_inode_t *ip = XFS_I(inode);
1050 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
1054 /* Set up bmap header for xfs internal routine */
1055 bm.bmv_offset = BTOBBT(start);
1056 /* Special case for whole file */
1057 if (length == FIEMAP_MAX_OFFSET)
1058 bm.bmv_length = -1LL;
1060 bm.bmv_length = BTOBB(start + length) - bm.bmv_offset;
1062 /* We add one because in getbmap world count includes the header */
1063 bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
1064 fieinfo->fi_extents_max + 1;
1065 bm.bmv_count = min_t(__s32, bm.bmv_count,
1066 (PAGE_SIZE * 16 / sizeof(struct getbmapx)));
1067 bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES;
1068 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
1069 bm.bmv_iflags |= BMV_IF_ATTRFORK;
1070 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
1071 bm.bmv_iflags |= BMV_IF_DELALLOC;
1073 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
1083 struct dentry *dentry,
1086 return xfs_generic_create(dir, dentry, mode, 0, true);
1089 static const struct inode_operations xfs_inode_operations = {
1090 .get_acl = xfs_get_acl,
1091 .set_acl = xfs_set_acl,
1092 .getattr = xfs_vn_getattr,
1093 .setattr = xfs_vn_setattr,
1094 .setxattr = generic_setxattr,
1095 .getxattr = generic_getxattr,
1096 .removexattr = generic_removexattr,
1097 .listxattr = xfs_vn_listxattr,
1098 .fiemap = xfs_vn_fiemap,
1099 .update_time = xfs_vn_update_time,
1102 static const struct inode_operations xfs_dir_inode_operations = {
1103 .create = xfs_vn_create,
1104 .lookup = xfs_vn_lookup,
1105 .link = xfs_vn_link,
1106 .unlink = xfs_vn_unlink,
1107 .symlink = xfs_vn_symlink,
1108 .mkdir = xfs_vn_mkdir,
1110 * Yes, XFS uses the same method for rmdir and unlink.
1112 * There are some subtile differences deeper in the code,
1113 * but we use S_ISDIR to check for those.
1115 .rmdir = xfs_vn_unlink,
1116 .mknod = xfs_vn_mknod,
1117 .rename2 = xfs_vn_rename,
1118 .get_acl = xfs_get_acl,
1119 .set_acl = xfs_set_acl,
1120 .getattr = xfs_vn_getattr,
1121 .setattr = xfs_vn_setattr,
1122 .setxattr = generic_setxattr,
1123 .getxattr = generic_getxattr,
1124 .removexattr = generic_removexattr,
1125 .listxattr = xfs_vn_listxattr,
1126 .update_time = xfs_vn_update_time,
1127 .tmpfile = xfs_vn_tmpfile,
1130 static const struct inode_operations xfs_dir_ci_inode_operations = {
1131 .create = xfs_vn_create,
1132 .lookup = xfs_vn_ci_lookup,
1133 .link = xfs_vn_link,
1134 .unlink = xfs_vn_unlink,
1135 .symlink = xfs_vn_symlink,
1136 .mkdir = xfs_vn_mkdir,
1138 * Yes, XFS uses the same method for rmdir and unlink.
1140 * There are some subtile differences deeper in the code,
1141 * but we use S_ISDIR to check for those.
1143 .rmdir = xfs_vn_unlink,
1144 .mknod = xfs_vn_mknod,
1145 .rename2 = xfs_vn_rename,
1146 .get_acl = xfs_get_acl,
1147 .set_acl = xfs_set_acl,
1148 .getattr = xfs_vn_getattr,
1149 .setattr = xfs_vn_setattr,
1150 .setxattr = generic_setxattr,
1151 .getxattr = generic_getxattr,
1152 .removexattr = generic_removexattr,
1153 .listxattr = xfs_vn_listxattr,
1154 .update_time = xfs_vn_update_time,
1155 .tmpfile = xfs_vn_tmpfile,
1158 static const struct inode_operations xfs_symlink_inode_operations = {
1159 .readlink = generic_readlink,
1160 .get_link = xfs_vn_get_link,
1161 .getattr = xfs_vn_getattr,
1162 .setattr = xfs_vn_setattr,
1163 .setxattr = generic_setxattr,
1164 .getxattr = generic_getxattr,
1165 .removexattr = generic_removexattr,
1166 .listxattr = xfs_vn_listxattr,
1167 .update_time = xfs_vn_update_time,
1171 xfs_diflags_to_iflags(
1172 struct inode *inode,
1173 struct xfs_inode *ip)
1175 uint16_t flags = ip->i_d.di_flags;
1177 inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC |
1180 if (flags & XFS_DIFLAG_IMMUTABLE)
1181 inode->i_flags |= S_IMMUTABLE;
1182 if (flags & XFS_DIFLAG_APPEND)
1183 inode->i_flags |= S_APPEND;
1184 if (flags & XFS_DIFLAG_SYNC)
1185 inode->i_flags |= S_SYNC;
1186 if (flags & XFS_DIFLAG_NOATIME)
1187 inode->i_flags |= S_NOATIME;
1188 if (S_ISREG(inode->i_mode) &&
1189 ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE &&
1190 (ip->i_mount->m_flags & XFS_MOUNT_DAX ||
1191 ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))
1192 inode->i_flags |= S_DAX;
1196 * Initialize the Linux inode and set up the operation vectors.
1198 * When reading existing inodes from disk this is called directly from xfs_iget,
1199 * when creating a new inode it is called from xfs_ialloc after setting up the
1200 * inode. These callers have different criteria for clearing XFS_INEW, so leave
1201 * it up to the caller to deal with unlocking the inode appropriately.
1205 struct xfs_inode *ip)
1207 struct inode *inode = &ip->i_vnode;
1210 inode->i_ino = ip->i_ino;
1211 inode->i_state = I_NEW;
1213 inode_sb_list_add(inode);
1214 /* make the inode look hashed for the writeback code */
1215 hlist_add_fake(&inode->i_hash);
1217 inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid);
1218 inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid);
1220 switch (inode->i_mode & S_IFMT) {
1224 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
1225 sysv_minor(ip->i_df.if_u2.if_rdev));
1232 i_size_write(inode, ip->i_d.di_size);
1233 xfs_diflags_to_iflags(inode, ip);
1235 ip->d_ops = ip->i_mount->m_nondir_inode_ops;
1236 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
1237 switch (inode->i_mode & S_IFMT) {
1239 inode->i_op = &xfs_inode_operations;
1240 inode->i_fop = &xfs_file_operations;
1241 inode->i_mapping->a_ops = &xfs_address_space_operations;
1244 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
1245 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
1246 inode->i_op = &xfs_dir_ci_inode_operations;
1248 inode->i_op = &xfs_dir_inode_operations;
1249 inode->i_fop = &xfs_dir_file_operations;
1250 ip->d_ops = ip->i_mount->m_dir_inode_ops;
1253 inode->i_op = &xfs_symlink_inode_operations;
1254 if (!(ip->i_df.if_flags & XFS_IFINLINE))
1255 inode->i_mapping->a_ops = &xfs_address_space_operations;
1258 inode->i_op = &xfs_inode_operations;
1259 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1264 * Ensure all page cache allocations are done from GFP_NOFS context to
1265 * prevent direct reclaim recursion back into the filesystem and blowing
1266 * stacks or deadlocking.
1268 gfp_mask = mapping_gfp_mask(inode->i_mapping);
1269 mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
1272 * If there is no attribute fork no ACL can exist on this inode,
1273 * and it can't have any file capabilities attached to it either.
1275 if (!XFS_IFORK_Q(ip)) {
1276 inode_has_no_xattr(inode);
1277 cache_no_acl(inode);