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"
26 #include "xfs_mount.h"
27 #include "xfs_da_format.h"
28 #include "xfs_inode.h"
30 #include "xfs_bmap_util.h"
32 #include "xfs_quota.h"
33 #include "xfs_error.h"
35 #include "xfs_trans.h"
36 #include "xfs_trace.h"
37 #include "xfs_icache.h"
38 #include "xfs_symlink.h"
39 #include "xfs_da_btree.h"
40 #include "xfs_dir2_priv.h"
41 #include "xfs_dinode.h"
42 #include "xfs_trans_space.h"
44 #include <linux/capability.h>
45 #include <linux/xattr.h>
46 #include <linux/namei.h>
47 #include <linux/posix_acl.h>
48 #include <linux/security.h>
49 #include <linux/fiemap.h>
50 #include <linux/slab.h>
53 * Directories have different lock order w.r.t. mmap_sem compared to regular
54 * files. This is due to readdir potentially triggering page faults on a user
55 * buffer inside filldir(), and this happens with the ilock on the directory
56 * held. For regular files, the lock order is the other way around - the
57 * mmap_sem is taken during the page fault, and then we lock the ilock to do
58 * block mapping. Hence we need a different class for the directory ilock so
59 * that lockdep can tell them apart.
61 static struct lock_class_key xfs_nondir_ilock_class;
62 static struct lock_class_key xfs_dir_ilock_class;
67 const struct xattr *xattr_array,
70 const struct xattr *xattr;
71 struct xfs_inode *ip = XFS_I(inode);
74 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
75 error = -xfs_attr_set(ip, xattr->name, xattr->value,
76 xattr->value_len, ATTR_SECURE);
84 * Hook in SELinux. This is not quite correct yet, what we really need
85 * here (as we do for default ACLs) is a mechanism by which creation of
86 * these attrs can be journalled at inode creation time (along with the
87 * inode, of course, such that log replay can't cause these to be lost).
94 const struct qstr *qstr)
96 return -security_inode_init_security(inode, dir, qstr,
97 &xfs_initxattrs, NULL);
102 struct xfs_name *namep,
103 struct dentry *dentry,
106 namep->name = dentry->d_name.name;
107 namep->len = dentry->d_name.len;
108 namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT];
115 struct dentry *dentry)
117 struct xfs_name teardown;
120 * If we can't add the ACL or we fail in
121 * xfs_init_security we must back out.
122 * ENOSPC can hit here, among other things.
124 xfs_dentry_to_name(&teardown, dentry, 0);
126 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
132 struct dentry *dentry,
135 bool tmpfile) /* unnamed file */
138 struct xfs_inode *ip = NULL;
139 struct posix_acl *default_acl, *acl;
140 struct xfs_name name;
144 * Irix uses Missed'em'V split, but doesn't want to see
145 * the upper 5 bits of (14bit) major.
147 if (S_ISCHR(mode) || S_ISBLK(mode)) {
148 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
150 rdev = sysv_encode_dev(rdev);
155 error = posix_acl_create(dir, &mode, &default_acl, &acl);
160 xfs_dentry_to_name(&name, dentry, mode);
161 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
163 error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip);
170 error = xfs_init_security(inode, dir, &dentry->d_name);
172 goto out_cleanup_inode;
174 #ifdef CONFIG_XFS_POSIX_ACL
176 error = -xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
178 goto out_cleanup_inode;
181 error = -xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
183 goto out_cleanup_inode;
188 d_tmpfile(dentry, inode);
190 d_instantiate(dentry, inode);
194 posix_acl_release(default_acl);
196 posix_acl_release(acl);
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 = old_dentry->d_inode;
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(dentry->d_inode));
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);
375 xfs_cleanup_inode(dir, inode, dentry);
384 struct dentry *odentry,
386 struct dentry *ndentry)
388 struct inode *new_inode = ndentry->d_inode;
389 struct xfs_name oname;
390 struct xfs_name nname;
392 xfs_dentry_to_name(&oname, odentry, 0);
393 xfs_dentry_to_name(&nname, ndentry, odentry->d_inode->i_mode);
395 return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
396 XFS_I(ndir), &nname, new_inode ?
397 XFS_I(new_inode) : NULL);
401 * careful here - this function can get called recursively, so
402 * we need to be very careful about how much stack we use.
403 * uio is kmalloced for this reason...
407 struct dentry *dentry,
408 struct nameidata *nd)
413 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
417 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
421 nd_set_link(nd, link);
427 nd_set_link(nd, ERR_PTR(error));
433 struct vfsmount *mnt,
434 struct dentry *dentry,
437 struct inode *inode = dentry->d_inode;
438 struct xfs_inode *ip = XFS_I(inode);
439 struct xfs_mount *mp = ip->i_mount;
441 trace_xfs_getattr(ip);
443 if (XFS_FORCED_SHUTDOWN(mp))
444 return -XFS_ERROR(EIO);
446 stat->size = XFS_ISIZE(ip);
447 stat->dev = inode->i_sb->s_dev;
448 stat->mode = ip->i_d.di_mode;
449 stat->nlink = ip->i_d.di_nlink;
450 stat->uid = inode->i_uid;
451 stat->gid = inode->i_gid;
452 stat->ino = ip->i_ino;
453 stat->atime = inode->i_atime;
454 stat->mtime = inode->i_mtime;
455 stat->ctime = inode->i_ctime;
457 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
460 switch (inode->i_mode & S_IFMT) {
463 stat->blksize = BLKDEV_IOSIZE;
464 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
465 sysv_minor(ip->i_df.if_u2.if_rdev));
468 if (XFS_IS_REALTIME_INODE(ip)) {
470 * If the file blocks are being allocated from a
471 * realtime volume, then return the inode's realtime
472 * extent size or the realtime volume's extent size.
475 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
477 stat->blksize = xfs_preferred_iosize(mp);
487 struct xfs_inode *ip,
490 struct inode *inode = VFS_I(ip);
491 umode_t mode = iattr->ia_mode;
493 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
495 ip->i_d.di_mode &= S_IFMT;
496 ip->i_d.di_mode |= mode & ~S_IFMT;
498 inode->i_mode &= S_IFMT;
499 inode->i_mode |= mode & ~S_IFMT;
504 struct xfs_inode *ip,
507 struct inode *inode = VFS_I(ip);
509 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
511 if (iattr->ia_valid & ATTR_ATIME) {
512 inode->i_atime = iattr->ia_atime;
513 ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec;
514 ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec;
516 if (iattr->ia_valid & ATTR_CTIME) {
517 inode->i_ctime = iattr->ia_ctime;
518 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
519 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
521 if (iattr->ia_valid & ATTR_MTIME) {
522 inode->i_mtime = iattr->ia_mtime;
523 ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
524 ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
530 struct xfs_inode *ip,
534 xfs_mount_t *mp = ip->i_mount;
535 struct inode *inode = VFS_I(ip);
536 int mask = iattr->ia_valid;
539 kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
540 kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
541 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
542 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
544 trace_xfs_setattr(ip);
546 /* If acls are being inherited, we already have this checked */
547 if (!(flags & XFS_ATTR_NOACL)) {
548 if (mp->m_flags & XFS_MOUNT_RDONLY)
549 return XFS_ERROR(EROFS);
551 if (XFS_FORCED_SHUTDOWN(mp))
552 return XFS_ERROR(EIO);
554 error = -inode_change_ok(inode, iattr);
556 return XFS_ERROR(error);
559 ASSERT((mask & ATTR_SIZE) == 0);
562 * If disk quotas is on, we make sure that the dquots do exist on disk,
563 * before we start any other transactions. Trying to do this later
564 * is messy. We don't care to take a readlock to look at the ids
565 * in inode here, because we can't hold it across the trans_reserve.
566 * If the IDs do change before we take the ilock, we're covered
567 * because the i_*dquot fields will get updated anyway.
569 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
572 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
574 qflags |= XFS_QMOPT_UQUOTA;
578 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
580 qflags |= XFS_QMOPT_GQUOTA;
586 * We take a reference when we initialize udqp and gdqp,
587 * so it is important that we never blindly double trip on
588 * the same variable. See xfs_create() for an example.
590 ASSERT(udqp == NULL);
591 ASSERT(gdqp == NULL);
592 error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid),
593 xfs_kgid_to_gid(gid),
595 qflags, &udqp, &gdqp, NULL);
600 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
601 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
605 xfs_ilock(ip, XFS_ILOCK_EXCL);
608 * Change file ownership. Must be the owner or privileged.
610 if (mask & (ATTR_UID|ATTR_GID)) {
612 * These IDs could have changed since we last looked at them.
613 * But, we're assured that if the ownership did change
614 * while we didn't have the inode locked, inode's dquot(s)
615 * would have changed also.
619 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
620 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
623 * Do a quota reservation only if uid/gid is actually
626 if (XFS_IS_QUOTA_RUNNING(mp) &&
627 ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
628 (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
630 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
631 NULL, capable(CAP_FOWNER) ?
632 XFS_QMOPT_FORCE_RES : 0);
633 if (error) /* out of quota */
634 goto out_trans_cancel;
638 xfs_trans_ijoin(tp, ip, 0);
641 * Change file ownership. Must be the owner or privileged.
643 if (mask & (ATTR_UID|ATTR_GID)) {
645 * CAP_FSETID overrides the following restrictions:
647 * The set-user-ID and set-group-ID bits of a file will be
648 * cleared upon successful return from chown()
650 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
651 !capable(CAP_FSETID))
652 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
655 * Change the ownerships and register quota modifications
656 * in the transaction.
658 if (!uid_eq(iuid, uid)) {
659 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
660 ASSERT(mask & ATTR_UID);
662 olddquot1 = xfs_qm_vop_chown(tp, ip,
663 &ip->i_udquot, udqp);
665 ip->i_d.di_uid = xfs_kuid_to_uid(uid);
668 if (!gid_eq(igid, gid)) {
669 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
670 ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
671 !XFS_IS_PQUOTA_ON(mp));
672 ASSERT(mask & ATTR_GID);
674 olddquot2 = xfs_qm_vop_chown(tp, ip,
675 &ip->i_gdquot, gdqp);
677 ip->i_d.di_gid = xfs_kgid_to_gid(gid);
682 if (mask & ATTR_MODE)
683 xfs_setattr_mode(ip, iattr);
684 if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
685 xfs_setattr_time(ip, iattr);
687 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
689 XFS_STATS_INC(xs_ig_attrchg);
691 if (mp->m_flags & XFS_MOUNT_WSYNC)
692 xfs_trans_set_sync(tp);
693 error = xfs_trans_commit(tp, 0);
695 xfs_iunlock(ip, XFS_ILOCK_EXCL);
698 * Release any dquot(s) the inode had kept before chown.
700 xfs_qm_dqrele(olddquot1);
701 xfs_qm_dqrele(olddquot2);
706 return XFS_ERROR(error);
709 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
710 * update. We could avoid this with linked transactions
711 * and passing down the transaction pointer all the way
712 * to attr_set. No previous user of the generic
713 * Posix ACL code seems to care about this issue either.
715 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
716 error = -posix_acl_chmod(inode, inode->i_mode);
718 return XFS_ERROR(error);
724 xfs_trans_cancel(tp, 0);
725 xfs_iunlock(ip, XFS_ILOCK_EXCL);
733 * Truncate file. Must have write permission and not be a directory.
737 struct xfs_inode *ip,
740 struct xfs_mount *mp = ip->i_mount;
741 struct inode *inode = VFS_I(ip);
742 xfs_off_t oldsize, newsize;
743 struct xfs_trans *tp;
746 uint commit_flags = 0;
748 trace_xfs_setattr(ip);
750 if (mp->m_flags & XFS_MOUNT_RDONLY)
751 return XFS_ERROR(EROFS);
753 if (XFS_FORCED_SHUTDOWN(mp))
754 return XFS_ERROR(EIO);
756 error = -inode_change_ok(inode, iattr);
758 return XFS_ERROR(error);
760 ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
761 ASSERT(S_ISREG(ip->i_d.di_mode));
762 ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
763 ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
765 oldsize = inode->i_size;
766 newsize = iattr->ia_size;
769 * Short circuit the truncate case for zero length files.
771 if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
772 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
776 * Use the regular setattr path to update the timestamps.
778 iattr->ia_valid &= ~ATTR_SIZE;
779 return xfs_setattr_nonsize(ip, iattr, 0);
783 * Make sure that the dquots are attached to the inode.
785 error = xfs_qm_dqattach(ip, 0);
790 * Now we can make the changes. Before we join the inode to the
791 * transaction, take care of the part of the truncation that must be
792 * done without the inode lock. This needs to be done before joining
793 * the inode to the transaction, because the inode cannot be unlocked
794 * once it is a part of the transaction.
796 if (newsize > oldsize) {
798 * Do the first part of growing a file: zero any data in the
799 * last block that is beyond the old EOF. We need to do this
800 * before the inode is joined to the transaction to modify
803 error = xfs_zero_eof(ip, newsize, oldsize);
809 * We are going to log the inode size change in this transaction so
810 * any previous writes that are beyond the on disk EOF and the new
811 * EOF that have not been written out need to be written here. If we
812 * do not write the data out, we expose ourselves to the null files
815 * Only flush from the on disk size to the smaller of the in memory
816 * file size or the new size as that's the range we really care about
817 * here and prevents waiting for other data not within the range we
820 if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) {
821 error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
822 ip->i_d.di_size, newsize);
828 * Wait for all direct I/O to complete.
830 inode_dio_wait(inode);
833 * Do all the page cache truncate work outside the transaction context
834 * as the "lock" order is page lock->log space reservation. i.e.
835 * locking pages inside the transaction can ABBA deadlock with
836 * writeback. We have to do the VFS inode size update before we truncate
837 * the pagecache, however, to avoid racing with page faults beyond the
838 * new EOF they are not serialised against truncate operations except by
839 * page locks and size updates.
841 * Hence we are in a situation where a truncate can fail with ENOMEM
842 * from xfs_trans_reserve(), but having already truncated the in-memory
843 * version of the file (i.e. made user visible changes). There's not
844 * much we can do about this, except to hope that the caller sees ENOMEM
845 * and retries the truncate operation.
847 error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
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 commit_flags = XFS_TRANS_RELEASE_LOG_RES;
858 lock_flags |= XFS_ILOCK_EXCL;
859 xfs_ilock(ip, XFS_ILOCK_EXCL);
860 xfs_trans_ijoin(tp, ip, 0);
863 * Only change the c/mtime if we are changing the size or we are
864 * explicitly asked to change it. This handles the semantic difference
865 * between truncate() and ftruncate() as implemented in the VFS.
867 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
868 * special case where we need to update the times despite not having
869 * these flags set. For all other operations the VFS set these flags
870 * explicitly if it wants a timestamp update.
872 if (newsize != oldsize &&
873 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
874 iattr->ia_ctime = iattr->ia_mtime =
875 current_fs_time(inode->i_sb);
876 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
880 * The first thing we do is set the size to new_size permanently on
881 * disk. This way we don't have to worry about anyone ever being able
882 * to look at the data being freed even in the face of a crash.
883 * What we're getting around here is the case where we free a block, it
884 * is allocated to another file, it is written to, and then we crash.
885 * If the new data gets written to the file but the log buffers
886 * containing the free and reallocation don't, then we'd end up with
887 * garbage in the blocks being freed. As long as we make the new size
888 * permanent before actually freeing any blocks it doesn't matter if
889 * they get written to.
891 ip->i_d.di_size = newsize;
892 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
894 if (newsize <= oldsize) {
895 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
897 goto out_trans_abort;
900 * Truncated "down", so we're removing references to old data
901 * here - if we delay flushing for a long time, we expose
902 * ourselves unduly to the notorious NULL files problem. So,
903 * we mark this inode and flush it when the file is closed,
904 * and do not wait the usual (long) time for writeout.
906 xfs_iflags_set(ip, XFS_ITRUNCATED);
908 /* A truncate down always removes post-EOF blocks. */
909 xfs_inode_clear_eofblocks_tag(ip);
912 if (iattr->ia_valid & ATTR_MODE)
913 xfs_setattr_mode(ip, iattr);
914 if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
915 xfs_setattr_time(ip, iattr);
917 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
919 XFS_STATS_INC(xs_ig_attrchg);
921 if (mp->m_flags & XFS_MOUNT_WSYNC)
922 xfs_trans_set_sync(tp);
924 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
927 xfs_iunlock(ip, lock_flags);
931 commit_flags |= XFS_TRANS_ABORT;
933 xfs_trans_cancel(tp, commit_flags);
939 struct dentry *dentry,
942 struct xfs_inode *ip = XFS_I(dentry->d_inode);
945 if (iattr->ia_valid & ATTR_SIZE) {
946 xfs_ilock(ip, XFS_IOLOCK_EXCL);
947 error = xfs_setattr_size(ip, iattr);
948 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
950 error = xfs_setattr_nonsize(ip, iattr, 0);
959 struct timespec *now,
962 struct xfs_inode *ip = XFS_I(inode);
963 struct xfs_mount *mp = ip->i_mount;
964 struct xfs_trans *tp;
967 trace_xfs_update_time(ip);
969 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
970 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0);
972 xfs_trans_cancel(tp, 0);
976 xfs_ilock(ip, XFS_ILOCK_EXCL);
977 if (flags & S_CTIME) {
978 inode->i_ctime = *now;
979 ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec;
980 ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec;
982 if (flags & S_MTIME) {
983 inode->i_mtime = *now;
984 ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec;
985 ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec;
987 if (flags & S_ATIME) {
988 inode->i_atime = *now;
989 ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec;
990 ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec;
992 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
993 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
994 return -xfs_trans_commit(tp, 0);
997 #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
1000 * Call fiemap helper to fill in user data.
1001 * Returns positive errors to xfs_getbmap.
1006 struct getbmapx *bmv,
1010 struct fiemap_extent_info *fieinfo = *arg;
1011 u32 fiemap_flags = 0;
1012 u64 logical, physical, length;
1014 /* Do nothing for a hole */
1015 if (bmv->bmv_block == -1LL)
1018 logical = BBTOB(bmv->bmv_offset);
1019 physical = BBTOB(bmv->bmv_block);
1020 length = BBTOB(bmv->bmv_length);
1022 if (bmv->bmv_oflags & BMV_OF_PREALLOC)
1023 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
1024 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
1025 fiemap_flags |= (FIEMAP_EXTENT_DELALLOC |
1026 FIEMAP_EXTENT_UNKNOWN);
1027 physical = 0; /* no block yet */
1029 if (bmv->bmv_oflags & BMV_OF_LAST)
1030 fiemap_flags |= FIEMAP_EXTENT_LAST;
1032 error = fiemap_fill_next_extent(fieinfo, logical, physical,
1033 length, fiemap_flags);
1036 *full = 1; /* user array now full */
1044 struct inode *inode,
1045 struct fiemap_extent_info *fieinfo,
1049 xfs_inode_t *ip = XFS_I(inode);
1053 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
1057 /* Set up bmap header for xfs internal routine */
1058 bm.bmv_offset = BTOBB(start);
1059 /* Special case for whole file */
1060 if (length == FIEMAP_MAX_OFFSET)
1061 bm.bmv_length = -1LL;
1063 bm.bmv_length = BTOBB(length);
1065 /* We add one because in getbmap world count includes the header */
1066 bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
1067 fieinfo->fi_extents_max + 1;
1068 bm.bmv_count = min_t(__s32, bm.bmv_count,
1069 (PAGE_SIZE * 16 / sizeof(struct getbmapx)));
1070 bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES;
1071 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
1072 bm.bmv_iflags |= BMV_IF_ATTRFORK;
1073 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
1074 bm.bmv_iflags |= BMV_IF_DELALLOC;
1076 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
1086 struct dentry *dentry,
1089 return xfs_generic_create(dir, dentry, mode, 0, true);
1092 static const struct inode_operations xfs_inode_operations = {
1093 .get_acl = xfs_get_acl,
1094 .set_acl = xfs_set_acl,
1095 .getattr = xfs_vn_getattr,
1096 .setattr = xfs_vn_setattr,
1097 .setxattr = generic_setxattr,
1098 .getxattr = generic_getxattr,
1099 .removexattr = generic_removexattr,
1100 .listxattr = xfs_vn_listxattr,
1101 .fiemap = xfs_vn_fiemap,
1102 .update_time = xfs_vn_update_time,
1105 static const struct inode_operations xfs_dir_inode_operations = {
1106 .create = xfs_vn_create,
1107 .lookup = xfs_vn_lookup,
1108 .link = xfs_vn_link,
1109 .unlink = xfs_vn_unlink,
1110 .symlink = xfs_vn_symlink,
1111 .mkdir = xfs_vn_mkdir,
1113 * Yes, XFS uses the same method for rmdir and unlink.
1115 * There are some subtile differences deeper in the code,
1116 * but we use S_ISDIR to check for those.
1118 .rmdir = xfs_vn_unlink,
1119 .mknod = xfs_vn_mknod,
1120 .rename = xfs_vn_rename,
1121 .get_acl = xfs_get_acl,
1122 .set_acl = xfs_set_acl,
1123 .getattr = xfs_vn_getattr,
1124 .setattr = xfs_vn_setattr,
1125 .setxattr = generic_setxattr,
1126 .getxattr = generic_getxattr,
1127 .removexattr = generic_removexattr,
1128 .listxattr = xfs_vn_listxattr,
1129 .update_time = xfs_vn_update_time,
1130 .tmpfile = xfs_vn_tmpfile,
1133 static const struct inode_operations xfs_dir_ci_inode_operations = {
1134 .create = xfs_vn_create,
1135 .lookup = xfs_vn_ci_lookup,
1136 .link = xfs_vn_link,
1137 .unlink = xfs_vn_unlink,
1138 .symlink = xfs_vn_symlink,
1139 .mkdir = xfs_vn_mkdir,
1141 * Yes, XFS uses the same method for rmdir and unlink.
1143 * There are some subtile differences deeper in the code,
1144 * but we use S_ISDIR to check for those.
1146 .rmdir = xfs_vn_unlink,
1147 .mknod = xfs_vn_mknod,
1148 .rename = xfs_vn_rename,
1149 .get_acl = xfs_get_acl,
1150 .set_acl = xfs_set_acl,
1151 .getattr = xfs_vn_getattr,
1152 .setattr = xfs_vn_setattr,
1153 .setxattr = generic_setxattr,
1154 .getxattr = generic_getxattr,
1155 .removexattr = generic_removexattr,
1156 .listxattr = xfs_vn_listxattr,
1157 .update_time = xfs_vn_update_time,
1158 .tmpfile = xfs_vn_tmpfile,
1161 static const struct inode_operations xfs_symlink_inode_operations = {
1162 .readlink = generic_readlink,
1163 .follow_link = xfs_vn_follow_link,
1164 .put_link = kfree_put_link,
1165 .getattr = xfs_vn_getattr,
1166 .setattr = xfs_vn_setattr,
1167 .setxattr = generic_setxattr,
1168 .getxattr = generic_getxattr,
1169 .removexattr = generic_removexattr,
1170 .listxattr = xfs_vn_listxattr,
1171 .update_time = xfs_vn_update_time,
1175 xfs_diflags_to_iflags(
1176 struct inode *inode,
1177 struct xfs_inode *ip)
1179 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
1180 inode->i_flags |= S_IMMUTABLE;
1182 inode->i_flags &= ~S_IMMUTABLE;
1183 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
1184 inode->i_flags |= S_APPEND;
1186 inode->i_flags &= ~S_APPEND;
1187 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
1188 inode->i_flags |= S_SYNC;
1190 inode->i_flags &= ~S_SYNC;
1191 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
1192 inode->i_flags |= S_NOATIME;
1194 inode->i_flags &= ~S_NOATIME;
1198 * Initialize the Linux inode, set up the operation vectors and
1201 * When reading existing inodes from disk this is called directly
1202 * from xfs_iget, when creating a new inode it is called from
1203 * xfs_ialloc after setting up the inode.
1205 * We are always called with an uninitialised linux inode here.
1206 * We need to initialise the necessary fields and take a reference
1211 struct xfs_inode *ip)
1213 struct inode *inode = &ip->i_vnode;
1216 inode->i_ino = ip->i_ino;
1217 inode->i_state = I_NEW;
1219 inode_sb_list_add(inode);
1220 /* make the inode look hashed for the writeback code */
1221 hlist_add_fake(&inode->i_hash);
1223 inode->i_mode = ip->i_d.di_mode;
1224 set_nlink(inode, ip->i_d.di_nlink);
1225 inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid);
1226 inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid);
1228 switch (inode->i_mode & S_IFMT) {
1232 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
1233 sysv_minor(ip->i_df.if_u2.if_rdev));
1240 inode->i_generation = ip->i_d.di_gen;
1241 i_size_write(inode, ip->i_d.di_size);
1242 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
1243 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
1244 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
1245 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
1246 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
1247 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
1248 xfs_diflags_to_iflags(inode, ip);
1250 ip->d_ops = ip->i_mount->m_nondir_inode_ops;
1251 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
1252 switch (inode->i_mode & S_IFMT) {
1254 inode->i_op = &xfs_inode_operations;
1255 inode->i_fop = &xfs_file_operations;
1256 inode->i_mapping->a_ops = &xfs_address_space_operations;
1259 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
1260 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
1261 inode->i_op = &xfs_dir_ci_inode_operations;
1263 inode->i_op = &xfs_dir_inode_operations;
1264 inode->i_fop = &xfs_dir_file_operations;
1265 ip->d_ops = ip->i_mount->m_dir_inode_ops;
1268 inode->i_op = &xfs_symlink_inode_operations;
1269 if (!(ip->i_df.if_flags & XFS_IFINLINE))
1270 inode->i_mapping->a_ops = &xfs_address_space_operations;
1273 inode->i_op = &xfs_inode_operations;
1274 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1279 * Ensure all page cache allocations are done from GFP_NOFS context to
1280 * prevent direct reclaim recursion back into the filesystem and blowing
1281 * stacks or deadlocking.
1283 gfp_mask = mapping_gfp_mask(inode->i_mapping);
1284 mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
1287 * If there is no attribute fork no ACL can exist on this inode,
1288 * and it can't have any file capabilities attached to it either.
1290 if (!XFS_IFORK_Q(ip)) {
1291 inode_has_no_xattr(inode);
1292 cache_no_acl(inode);
1295 xfs_iflags_clear(ip, XFS_INEW);
1298 unlock_new_inode(inode);