1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * Create and rename file, directory, symlinks
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 * Portions of this code from linux/fs/ext3/dir.c
12 * Copyright (C) 1992, 1993, 1994, 1995
13 * Remy Card (card@masi.ibp.fr)
14 * Laboratoire MASI - Institut Blaise pascal
15 * Universite Pierre et Marie Curie (Paris VI)
19 * linux/fs/minix/dir.c
21 * Copyright (C) 1991, 1992 Linux Torvalds
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public
25 * License as published by the Free Software Foundation; either
26 * version 2 of the License, or (at your option) any later version.
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
33 * You should have received a copy of the GNU General Public
34 * License along with this program; if not, write to the
35 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
36 * Boston, MA 021110-1307, USA.
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <linux/highmem.h>
43 #include <linux/quotaops.h>
44 #include <linux/iversion.h>
46 #include <cluster/masklog.h>
54 #include "extent_map.h"
66 #include "ocfs2_trace.h"
68 #include "buffer_head_io.h"
70 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
74 struct buffer_head **new_fe_bh,
75 struct buffer_head *parent_fe_bh,
77 struct ocfs2_alloc_context *inode_ac);
79 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
80 struct inode **ret_orphan_dir,
83 struct ocfs2_dir_lookup_result *lookup,
86 static int ocfs2_orphan_add(struct ocfs2_super *osb,
89 struct buffer_head *fe_bh,
91 struct ocfs2_dir_lookup_result *lookup,
92 struct inode *orphan_dir_inode,
95 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
100 static int ocfs2_double_lock(struct ocfs2_super *osb,
101 struct buffer_head **bh1,
102 struct inode *inode1,
103 struct buffer_head **bh2,
104 struct inode *inode2,
107 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
108 /* An orphan dir name is an 8 byte value, printed as a hex string */
109 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
111 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
116 struct inode *inode = NULL;
118 struct ocfs2_inode_info *oi;
120 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
122 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
124 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
125 ret = ERR_PTR(-ENAMETOOLONG);
129 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
131 if (status != -ENOENT)
133 ret = ERR_PTR(status);
137 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
138 dentry->d_name.len, &blkno);
142 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
144 ret = ERR_PTR(-EACCES);
149 /* Clear any orphaned state... If we were able to look up the
150 * inode from a directory, it certainly can't be orphaned. We
151 * might have the bad state from a node which intended to
152 * orphan this inode but crashed before it could commit the
154 spin_lock(&oi->ip_lock);
155 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
156 spin_unlock(&oi->ip_lock);
159 ret = d_splice_alias(inode, dentry);
163 * If d_splice_alias() finds a DCACHE_DISCONNECTED
164 * dentry, it will d_move() it on top of ourse. The
165 * return value will indicate this however, so in
166 * those cases, we switch them around for the locking
169 * NOTE: This dentry already has ->d_op set from
170 * ocfs2_get_parent() and ocfs2_get_dentry()
172 if (!IS_ERR_OR_NULL(ret))
175 status = ocfs2_dentry_attach_lock(dentry, inode,
176 OCFS2_I(dir)->ip_blkno);
179 ret = ERR_PTR(status);
183 ocfs2_dentry_attach_gen(dentry);
186 /* Don't drop the cluster lock until *after* the d_add --
187 * unlink on another node will message us to remove that
188 * dentry under this lock so otherwise we can race this with
189 * the downconvert thread and have a stale dentry. */
190 ocfs2_inode_unlock(dir, 0);
194 trace_ocfs2_lookup_ret(ret);
199 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
204 inode = new_inode(dir->i_sb);
206 mlog(ML_ERROR, "new_inode failed!\n");
207 return ERR_PTR(-ENOMEM);
210 /* populate as many fields early on as possible - many of
211 * these are used by the support functions here and in
215 inode_init_owner(inode, dir, mode);
216 status = dquot_initialize(inode);
218 return ERR_PTR(status);
223 static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
224 struct dentry *dentry, struct inode *inode)
226 struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
228 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
229 ocfs2_lock_res_free(&dl->dl_lockres);
230 BUG_ON(dl->dl_count != 1);
231 spin_lock(&dentry_attach_lock);
232 dentry->d_fsdata = NULL;
233 spin_unlock(&dentry_attach_lock);
238 static int ocfs2_mknod(struct inode *dir,
239 struct dentry *dentry,
244 struct buffer_head *parent_fe_bh = NULL;
245 handle_t *handle = NULL;
246 struct ocfs2_super *osb;
247 struct ocfs2_dinode *dirfe;
248 struct ocfs2_dinode *fe = NULL;
249 struct buffer_head *new_fe_bh = NULL;
250 struct inode *inode = NULL;
251 struct ocfs2_alloc_context *inode_ac = NULL;
252 struct ocfs2_alloc_context *data_ac = NULL;
253 struct ocfs2_alloc_context *meta_ac = NULL;
254 int want_clusters = 0;
256 int xattr_credits = 0;
257 struct ocfs2_security_xattr_info si = {
260 int did_quota_inode = 0;
261 struct ocfs2_dir_lookup_result lookup = { NULL, };
263 int did_block_signals = 0;
264 struct ocfs2_dentry_lock *dl = NULL;
266 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
267 (unsigned long long)OCFS2_I(dir)->ip_blkno,
268 (unsigned long)dev, mode);
270 status = dquot_initialize(dir);
276 /* get our super block */
277 osb = OCFS2_SB(dir->i_sb);
279 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
281 if (status != -ENOENT)
286 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
291 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
292 if (!ocfs2_read_links_count(dirfe)) {
293 /* can't make a file in a deleted directory. */
298 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
303 /* get a spot inside the dir. */
304 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
306 dentry->d_name.len, &lookup);
312 /* reserve an inode spot */
313 status = ocfs2_reserve_new_inode(osb, &inode_ac);
315 if (status != -ENOSPC)
320 inode = ocfs2_get_init_inode(dir, mode);
322 status = PTR_ERR(inode);
328 /* get security xattr */
329 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
331 if (status == -EOPNOTSUPP)
339 /* calculate meta data/clusters for setting security and acl xattr */
340 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
342 &xattr_credits, &want_meta);
348 /* Reserve a cluster if creating an extent based directory. */
349 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
352 /* Dir indexing requires extra space as well */
353 if (ocfs2_supports_indexed_dirs(osb))
357 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
359 if (status != -ENOSPC)
364 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
366 if (status != -ENOSPC)
371 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
374 if (IS_ERR(handle)) {
375 status = PTR_ERR(handle);
381 /* Starting to change things, restart is no longer possible. */
382 ocfs2_block_signals(&oldset);
383 did_block_signals = 1;
385 status = dquot_alloc_inode(inode);
390 /* do the real work now. */
391 status = ocfs2_mknod_locked(osb, dir, inode, dev,
392 &new_fe_bh, parent_fe_bh, handle,
399 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
401 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
402 new_fe_bh, data_ac, meta_ac);
408 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
410 OCFS2_JOURNAL_ACCESS_WRITE);
415 ocfs2_add_links_count(dirfe, 1);
416 ocfs2_journal_dirty(handle, parent_fe_bh);
420 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
429 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
438 * Do this before adding the entry to the directory. We add
439 * also set d_op after success so that ->d_iput() will cleanup
440 * the dentry lock even if ocfs2_add_entry() fails below.
442 status = ocfs2_dentry_attach_lock(dentry, inode,
443 OCFS2_I(dir)->ip_blkno);
449 dl = dentry->d_fsdata;
451 status = ocfs2_add_entry(handle, dentry, inode,
452 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
459 insert_inode_hash(inode);
460 d_instantiate(dentry, inode);
463 if (status < 0 && did_quota_inode)
464 dquot_free_inode(inode);
466 if (status < 0 && fe)
467 ocfs2_set_links_count(fe, 0);
468 ocfs2_commit_trans(osb, handle);
471 ocfs2_inode_unlock(dir, 1);
472 if (did_block_signals)
473 ocfs2_unblock_signals(&oldset);
476 brelse(parent_fe_bh);
479 ocfs2_free_dir_lookup_result(&lookup);
482 ocfs2_free_alloc_context(inode_ac);
485 ocfs2_free_alloc_context(data_ac);
488 ocfs2_free_alloc_context(meta_ac);
491 * We should call iput after the i_mutex of the bitmap been
492 * unlocked in ocfs2_free_alloc_context, or the
493 * ocfs2_delete_inode will mutex_lock again.
495 if ((status < 0) && inode) {
497 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
499 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
510 static int __ocfs2_mknod_locked(struct inode *dir,
513 struct buffer_head **new_fe_bh,
514 struct buffer_head *parent_fe_bh,
516 struct ocfs2_alloc_context *inode_ac,
517 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
520 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
521 struct ocfs2_dinode *fe = NULL;
522 struct ocfs2_extent_list *fel;
524 struct ocfs2_inode_info *oi = OCFS2_I(inode);
525 struct timespec64 ts;
529 /* populate as many fields early on as possible - many of
530 * these are used by the support functions here and in
532 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
533 oi->ip_blkno = fe_blkno;
534 spin_lock(&osb->osb_lock);
535 inode->i_generation = osb->s_next_generation++;
536 spin_unlock(&osb->osb_lock);
538 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
544 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
546 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
548 OCFS2_JOURNAL_ACCESS_CREATE);
554 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
555 memset(fe, 0, osb->sb->s_blocksize);
557 fe->i_generation = cpu_to_le32(inode->i_generation);
558 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
559 fe->i_blkno = cpu_to_le64(fe_blkno);
560 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
561 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
562 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
563 fe->i_uid = cpu_to_le32(i_uid_read(inode));
564 fe->i_gid = cpu_to_le32(i_gid_read(inode));
565 fe->i_mode = cpu_to_le16(inode->i_mode);
566 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
567 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
569 ocfs2_set_links_count(fe, inode->i_nlink);
571 fe->i_last_eb_blk = 0;
572 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
573 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
574 ktime_get_real_ts64(&ts);
575 fe->i_atime = fe->i_ctime = fe->i_mtime =
576 cpu_to_le64(ts.tv_sec);
577 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
578 cpu_to_le32(ts.tv_nsec);
582 * If supported, directories start with inline data. If inline
583 * isn't supported, but indexing is, we start them as indexed.
585 feat = le16_to_cpu(fe->i_dyn_features);
586 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
587 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
589 fe->id2.i_data.id_count = cpu_to_le16(
590 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
592 fel = &fe->id2.i_list;
593 fel->l_tree_depth = 0;
594 fel->l_next_free_rec = 0;
595 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
598 ocfs2_journal_dirty(handle, *new_fe_bh);
600 ocfs2_populate_inode(inode, fe, 1);
601 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
602 if (!ocfs2_mount_local(osb)) {
603 status = ocfs2_create_new_inode_locks(inode);
608 oi->i_sync_tid = handle->h_transaction->t_tid;
609 oi->i_datasync_tid = handle->h_transaction->t_tid;
624 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
628 struct buffer_head **new_fe_bh,
629 struct buffer_head *parent_fe_bh,
631 struct ocfs2_alloc_context *inode_ac)
634 u64 suballoc_loc, fe_blkno = 0;
639 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
640 inode_ac, &suballoc_loc,
641 &suballoc_bit, &fe_blkno);
647 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
648 parent_fe_bh, handle, inode_ac,
649 fe_blkno, suballoc_loc, suballoc_bit);
652 static int ocfs2_mkdir(struct inode *dir,
653 struct dentry *dentry,
658 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
659 OCFS2_I(dir)->ip_blkno, mode);
660 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
667 static int ocfs2_create(struct inode *dir,
668 struct dentry *dentry,
674 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
675 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
676 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
683 static int ocfs2_link(struct dentry *old_dentry,
685 struct dentry *dentry)
688 struct inode *inode = d_inode(old_dentry);
689 struct inode *old_dir = d_inode(old_dentry->d_parent);
691 struct buffer_head *fe_bh = NULL;
692 struct buffer_head *old_dir_bh = NULL;
693 struct buffer_head *parent_fe_bh = NULL;
694 struct ocfs2_dinode *fe = NULL;
695 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
696 struct ocfs2_dir_lookup_result lookup = { NULL, };
700 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
701 old_dentry->d_name.len, old_dentry->d_name.name,
702 dentry->d_name.len, dentry->d_name.name);
704 if (S_ISDIR(inode->i_mode))
707 err = dquot_initialize(dir);
713 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
714 &parent_fe_bh, dir, 0);
721 /* make sure both dirs have bhs
722 * get an extra ref on old_dir_bh if old==new */
725 parent_fe_bh = old_dir_bh;
726 get_bh(parent_fe_bh);
728 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
739 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
740 old_dentry->d_name.len, &old_de_ino);
747 * Check whether another node removed the source inode while we
750 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
755 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
760 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
762 dentry->d_name.len, &lookup);
768 err = ocfs2_inode_lock(inode, &fe_bh, 1);
775 fe = (struct ocfs2_dinode *) fe_bh->b_data;
776 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
778 goto out_unlock_inode;
781 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
782 if (IS_ERR(handle)) {
783 err = PTR_ERR(handle);
786 goto out_unlock_inode;
789 /* Starting to change things, restart is no longer possible. */
790 ocfs2_block_signals(&oldset);
792 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
793 OCFS2_JOURNAL_ACCESS_WRITE);
800 inode->i_ctime = current_time(inode);
801 ocfs2_set_links_count(fe, inode->i_nlink);
802 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
803 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
804 ocfs2_journal_dirty(handle, fe_bh);
806 err = ocfs2_add_entry(handle, dentry, inode,
807 OCFS2_I(inode)->ip_blkno,
808 parent_fe_bh, &lookup);
810 ocfs2_add_links_count(fe, -1);
816 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
823 d_instantiate(dentry, inode);
826 ocfs2_commit_trans(osb, handle);
827 ocfs2_unblock_signals(&oldset);
829 ocfs2_inode_unlock(inode, 1);
832 ocfs2_double_unlock(old_dir, dir);
835 brelse(parent_fe_bh);
838 ocfs2_free_dir_lookup_result(&lookup);
847 * Takes and drops an exclusive lock on the given dentry. This will
848 * force other nodes to drop it.
850 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
854 ret = ocfs2_dentry_lock(dentry, 1);
858 ocfs2_dentry_unlock(dentry, 1);
863 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
865 if (S_ISDIR(inode->i_mode)) {
866 if (inode->i_nlink == 2)
871 if (inode->i_nlink == 1)
876 static int ocfs2_unlink(struct inode *dir,
877 struct dentry *dentry)
880 int child_locked = 0;
881 bool is_unlinkable = false;
882 struct inode *inode = d_inode(dentry);
883 struct inode *orphan_dir = NULL;
884 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
886 struct ocfs2_dinode *fe = NULL;
887 struct buffer_head *fe_bh = NULL;
888 struct buffer_head *parent_node_bh = NULL;
889 handle_t *handle = NULL;
890 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
891 struct ocfs2_dir_lookup_result lookup = { NULL, };
892 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
894 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
896 (unsigned long long)OCFS2_I(dir)->ip_blkno,
897 (unsigned long long)OCFS2_I(inode)->ip_blkno);
899 status = dquot_initialize(dir);
905 BUG_ON(d_inode(dentry->d_parent) != dir);
907 if (inode == osb->root_inode)
910 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
913 if (status != -ENOENT)
918 status = ocfs2_find_files_on_disk(dentry->d_name.name,
919 dentry->d_name.len, &blkno, dir,
922 if (status != -ENOENT)
927 if (OCFS2_I(inode)->ip_blkno != blkno) {
930 trace_ocfs2_unlink_noent(
931 (unsigned long long)OCFS2_I(inode)->ip_blkno,
932 (unsigned long long)blkno,
933 OCFS2_I(inode)->ip_flags);
937 status = ocfs2_inode_lock(inode, &fe_bh, 1);
939 if (status != -ENOENT)
945 if (S_ISDIR(inode->i_mode)) {
946 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
952 status = ocfs2_remote_dentry_delete(dentry);
954 /* This remote delete should succeed under all normal
960 if (ocfs2_inode_is_unlinkable(inode)) {
961 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
962 OCFS2_I(inode)->ip_blkno,
963 orphan_name, &orphan_insert,
969 is_unlinkable = true;
972 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
973 if (IS_ERR(handle)) {
974 status = PTR_ERR(handle);
980 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
981 OCFS2_JOURNAL_ACCESS_WRITE);
987 fe = (struct ocfs2_dinode *) fe_bh->b_data;
989 /* delete the name from the parent dir */
990 status = ocfs2_delete_entry(handle, dir, &lookup);
996 if (S_ISDIR(inode->i_mode))
999 ocfs2_set_links_count(fe, inode->i_nlink);
1000 ocfs2_journal_dirty(handle, fe_bh);
1002 dir->i_ctime = dir->i_mtime = current_time(dir);
1003 if (S_ISDIR(inode->i_mode))
1006 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1009 if (S_ISDIR(inode->i_mode))
1014 if (is_unlinkable) {
1015 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
1016 orphan_name, &orphan_insert, orphan_dir, false);
1023 ocfs2_commit_trans(osb, handle);
1026 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1027 ocfs2_inode_unlock(orphan_dir, 1);
1028 inode_unlock(orphan_dir);
1033 ocfs2_inode_unlock(inode, 1);
1035 ocfs2_inode_unlock(dir, 1);
1038 brelse(parent_node_bh);
1040 ocfs2_free_dir_lookup_result(&orphan_insert);
1041 ocfs2_free_dir_lookup_result(&lookup);
1043 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
1049 static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1050 u64 src_inode_no, u64 dest_inode_no)
1053 u64 parent_inode_no = 0;
1054 u64 child_inode_no = src_inode_no;
1055 struct inode *child_inode;
1057 #define MAX_LOOKUP_TIMES 32
1059 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1060 if (IS_ERR(child_inode)) {
1061 ret = PTR_ERR(child_inode);
1065 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1073 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1075 ocfs2_inode_unlock(child_inode, 0);
1082 if (parent_inode_no == dest_inode_no) {
1087 if (parent_inode_no == osb->root_inode->i_ino) {
1092 child_inode_no = parent_inode_no;
1094 if (++i >= MAX_LOOKUP_TIMES) {
1095 mlog(ML_NOTICE, "max lookup times reached, filesystem "
1096 "may have nested directories, "
1097 "src inode: %llu, dest inode: %llu.\n",
1098 (unsigned long long)src_inode_no,
1099 (unsigned long long)dest_inode_no);
1109 * The only place this should be used is rename and link!
1110 * if they have the same id, then the 1st one is the only one locked.
1112 static int ocfs2_double_lock(struct ocfs2_super *osb,
1113 struct buffer_head **bh1,
1114 struct inode *inode1,
1115 struct buffer_head **bh2,
1116 struct inode *inode2,
1120 int inode1_is_ancestor, inode2_is_ancestor;
1121 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1122 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1124 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1125 (unsigned long long)oi2->ip_blkno);
1132 /* we always want to lock the one with the lower lockid first.
1133 * and if they are nested, we lock ancestor first */
1134 if (oi1->ip_blkno != oi2->ip_blkno) {
1135 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1137 if (inode1_is_ancestor < 0) {
1138 status = inode1_is_ancestor;
1142 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1144 if (inode2_is_ancestor < 0) {
1145 status = inode2_is_ancestor;
1149 if ((inode1_is_ancestor == 1) ||
1150 (oi1->ip_blkno < oi2->ip_blkno &&
1151 inode2_is_ancestor == 0)) {
1152 /* switch id1 and id2 around */
1154 swap(inode2, inode1);
1157 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1158 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
1160 if (status != -ENOENT)
1167 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1168 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
1171 * An error return must mean that no cluster locks
1172 * were held on function exit.
1174 if (oi1->ip_blkno != oi2->ip_blkno) {
1175 ocfs2_inode_unlock(inode2, 1);
1180 if (status != -ENOENT)
1184 trace_ocfs2_double_lock_end(
1185 (unsigned long long)oi1->ip_blkno,
1186 (unsigned long long)oi2->ip_blkno);
1194 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1196 ocfs2_inode_unlock(inode1, 1);
1198 if (inode1 != inode2)
1199 ocfs2_inode_unlock(inode2, 1);
1202 static int ocfs2_rename(struct inode *old_dir,
1203 struct dentry *old_dentry,
1204 struct inode *new_dir,
1205 struct dentry *new_dentry,
1208 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1209 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1210 struct inode *old_inode = d_inode(old_dentry);
1211 struct inode *new_inode = d_inode(new_dentry);
1212 struct inode *orphan_dir = NULL;
1213 struct ocfs2_dinode *newfe = NULL;
1214 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1215 struct buffer_head *newfe_bh = NULL;
1216 struct buffer_head *old_inode_bh = NULL;
1217 struct ocfs2_super *osb = NULL;
1218 u64 newfe_blkno, old_de_ino;
1219 handle_t *handle = NULL;
1220 struct buffer_head *old_dir_bh = NULL;
1221 struct buffer_head *new_dir_bh = NULL;
1222 u32 old_dir_nlink = old_dir->i_nlink;
1223 struct ocfs2_dinode *old_di;
1224 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1225 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1226 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1227 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1228 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1229 bool should_add_orphan = false;
1234 /* At some point it might be nice to break this function up a
1237 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1238 old_dentry->d_name.len, old_dentry->d_name.name,
1239 new_dentry->d_name.len, new_dentry->d_name.name);
1241 status = dquot_initialize(old_dir);
1246 status = dquot_initialize(new_dir);
1252 osb = OCFS2_SB(old_dir->i_sb);
1255 if (!igrab(new_inode))
1259 /* Assume a directory hierarchy thusly:
1262 * a,b,c, and d are all directories.
1264 * from cwd of 'a' on both nodes:
1268 * And that's why, just like the VFS, we need a file system
1270 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1271 status = ocfs2_rename_lock(osb);
1278 /* here we cannot guarantee the inodes haven't just been
1279 * changed, so check if they are nested again */
1280 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1285 } else if (status == 1) {
1287 trace_ocfs2_rename_not_permitted(
1288 (unsigned long long)old_inode->i_ino,
1289 (unsigned long long)new_dir->i_ino);
1294 /* if old and new are the same, this'll just do one lock. */
1295 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1296 &new_dir_bh, new_dir, 1);
1303 if (!new_dir->i_nlink) {
1308 /* make sure both dirs have bhs
1309 * get an extra ref on old_dir_bh if old==new */
1312 new_dir_bh = old_dir_bh;
1315 mlog(ML_ERROR, "no old_dir_bh!\n");
1322 * Aside from allowing a meta data update, the locking here
1323 * also ensures that the downconvert thread on other nodes
1324 * won't have to concurrently downconvert the inode and the
1327 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1330 if (status != -ENOENT)
1334 old_child_locked = 1;
1336 status = ocfs2_remote_dentry_delete(old_dentry);
1342 if (S_ISDIR(old_inode->i_mode)) {
1343 u64 old_inode_parent;
1346 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1348 &old_inode_dot_dot_res);
1354 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1359 if (!new_inode && new_dir != old_dir &&
1360 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1366 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1367 old_dentry->d_name.len,
1375 * Check for inode number is _not_ due to possible IO errors.
1376 * We might rmdir the source, keep it as pwd of some process
1377 * and merrily kill the link to whatever was created under the
1378 * same name. Goodbye sticky bit ;-<
1380 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1385 /* check if the target already exists (in which case we need
1387 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1388 new_dentry->d_name.len,
1389 &newfe_blkno, new_dir,
1390 &target_lookup_res);
1391 /* The only error we allow here is -ENOENT because the new
1392 * file not existing is perfectly valid. */
1393 if ((status < 0) && (status != -ENOENT)) {
1394 /* If we cannot find the file specified we should just */
1395 /* return the error... */
1402 if (!target_exists && new_inode) {
1404 * Target was unlinked by another node while we were
1405 * waiting to get to ocfs2_rename(). There isn't
1406 * anything we can do here to help the situation, so
1407 * bubble up the appropriate error.
1413 /* In case we need to overwrite an existing file, we blow it
1415 if (target_exists) {
1416 /* VFS didn't think there existed an inode here, but
1417 * someone else in the cluster must have raced our
1418 * rename to create one. Today we error cleanly, in
1419 * the future we should consider calling iget to build
1420 * a new struct inode for this entry. */
1424 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1425 new_dentry->d_name.name);
1429 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1432 trace_ocfs2_rename_disagree(
1433 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1434 (unsigned long long)newfe_blkno,
1435 OCFS2_I(new_inode)->ip_flags);
1439 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1441 if (status != -ENOENT)
1445 new_child_locked = 1;
1447 status = ocfs2_remote_dentry_delete(new_dentry);
1453 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1455 trace_ocfs2_rename_over_existing(
1456 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1457 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1459 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1460 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1461 OCFS2_I(new_inode)->ip_blkno,
1462 orphan_name, &orphan_insert,
1468 should_add_orphan = true;
1471 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
1473 status = ocfs2_check_dir_for_entry(new_dir,
1474 new_dentry->d_name.name,
1475 new_dentry->d_name.len);
1479 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1480 new_dentry->d_name.name,
1481 new_dentry->d_name.len,
1489 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1490 if (IS_ERR(handle)) {
1491 status = PTR_ERR(handle);
1497 if (target_exists) {
1498 if (S_ISDIR(new_inode->i_mode)) {
1499 if (new_inode->i_nlink != 2 ||
1500 !ocfs2_empty_dir(new_inode)) {
1501 status = -ENOTEMPTY;
1505 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1507 OCFS2_JOURNAL_ACCESS_WRITE);
1513 /* change the dirent to point to the correct inode */
1514 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1520 inode_inc_iversion(new_dir);
1522 if (S_ISDIR(new_inode->i_mode))
1523 ocfs2_set_links_count(newfe, 0);
1525 ocfs2_add_links_count(newfe, -1);
1526 ocfs2_journal_dirty(handle, newfe_bh);
1527 if (should_add_orphan) {
1528 status = ocfs2_orphan_add(osb, handle, new_inode,
1529 newfe_bh, orphan_name,
1530 &orphan_insert, orphan_dir, false);
1537 /* if the name was not found in new_dir, add it now */
1538 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1539 OCFS2_I(old_inode)->ip_blkno,
1540 new_dir_bh, &target_insert);
1547 old_inode->i_ctime = current_time(old_inode);
1548 mark_inode_dirty(old_inode);
1550 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1552 OCFS2_JOURNAL_ACCESS_WRITE);
1554 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1556 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1557 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1558 ocfs2_journal_dirty(handle, old_inode_bh);
1563 * Now that the name has been added to new_dir, remove the old name.
1565 * We don't keep any directory entry context around until now
1566 * because the insert might have changed the type of directory
1567 * we're dealing with.
1569 status = ocfs2_find_entry(old_dentry->d_name.name,
1570 old_dentry->d_name.len, old_dir,
1573 if (!is_journal_aborted(osb->journal->j_journal)) {
1574 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1576 new_dentry->d_name.len, new_dentry->d_name.name,
1577 old_dentry->d_name.len, old_dentry->d_name.name);
1582 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1585 if (!is_journal_aborted(osb->journal->j_journal)) {
1586 ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
1588 new_dentry->d_name.len, new_dentry->d_name.name,
1589 old_dentry->d_name.len, old_dentry->d_name.name);
1595 drop_nlink(new_inode);
1596 new_inode->i_ctime = current_time(new_inode);
1598 old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
1600 if (update_dot_dot) {
1601 status = ocfs2_update_entry(old_inode, handle,
1602 &old_inode_dot_dot_res, new_dir);
1603 drop_nlink(old_dir);
1605 drop_nlink(new_inode);
1608 mark_inode_dirty(new_dir);
1611 mark_inode_dirty(old_dir);
1612 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1614 mark_inode_dirty(new_inode);
1615 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1618 if (old_dir != new_dir) {
1619 /* Keep the same times on both directories.*/
1620 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1623 * This will also pick up the i_nlink change from the
1626 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1629 if (old_dir_nlink != old_dir->i_nlink) {
1631 mlog(ML_ERROR, "need to change nlink for old dir "
1632 "%llu from %d to %d but bh is NULL!\n",
1633 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1634 (int)old_dir_nlink, old_dir->i_nlink);
1636 struct ocfs2_dinode *fe;
1637 status = ocfs2_journal_access_di(handle,
1638 INODE_CACHE(old_dir),
1640 OCFS2_JOURNAL_ACCESS_WRITE);
1641 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1642 ocfs2_set_links_count(fe, old_dir->i_nlink);
1643 ocfs2_journal_dirty(handle, old_dir_bh);
1646 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1650 ocfs2_commit_trans(osb, handle);
1653 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1654 ocfs2_inode_unlock(orphan_dir, 1);
1655 inode_unlock(orphan_dir);
1659 if (new_child_locked)
1660 ocfs2_inode_unlock(new_inode, 1);
1662 if (old_child_locked)
1663 ocfs2_inode_unlock(old_inode, 1);
1666 ocfs2_double_unlock(old_dir, new_dir);
1669 ocfs2_rename_unlock(osb);
1672 sync_mapping_buffers(old_inode->i_mapping);
1676 ocfs2_free_dir_lookup_result(&target_lookup_res);
1677 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1678 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1679 ocfs2_free_dir_lookup_result(&orphan_insert);
1680 ocfs2_free_dir_lookup_result(&target_insert);
1683 brelse(old_inode_bh);
1694 * we expect i_size = strlen(symname). Copy symname into the file
1695 * data, including the null terminator.
1697 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1699 struct inode *inode,
1700 const char *symname)
1702 struct buffer_head **bhs = NULL;
1704 struct super_block *sb = osb->sb;
1705 u64 p_blkno, p_blocks;
1706 int virtual, blocks, status, i, bytes_left;
1708 bytes_left = i_size_read(inode) + 1;
1709 /* we can't trust i_blocks because we're actually going to
1710 * write i_size + 1 bytes. */
1711 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1713 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1714 i_size_read(inode), blocks);
1716 /* Sanity check -- make sure we're going to fit. */
1718 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1724 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1731 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1738 /* links can never be larger than one cluster so we know this
1739 * is all going to be contiguous, but do a sanity check
1741 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1748 while(bytes_left > 0) {
1749 c = &symname[virtual * sb->s_blocksize];
1751 bhs[virtual] = sb_getblk(sb, p_blkno);
1752 if (!bhs[virtual]) {
1757 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1760 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1762 OCFS2_JOURNAL_ACCESS_CREATE);
1768 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1770 memcpy(bhs[virtual]->b_data, c,
1771 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1774 ocfs2_journal_dirty(handle, bhs[virtual]);
1778 bytes_left -= sb->s_blocksize;
1785 for(i = 0; i < blocks; i++)
1795 static int ocfs2_symlink(struct inode *dir,
1796 struct dentry *dentry,
1797 const char *symname)
1799 int status, l, credits;
1801 struct ocfs2_super *osb = NULL;
1802 struct inode *inode = NULL;
1803 struct super_block *sb;
1804 struct buffer_head *new_fe_bh = NULL;
1805 struct buffer_head *parent_fe_bh = NULL;
1806 struct ocfs2_dinode *fe = NULL;
1807 struct ocfs2_dinode *dirfe;
1808 handle_t *handle = NULL;
1809 struct ocfs2_alloc_context *inode_ac = NULL;
1810 struct ocfs2_alloc_context *data_ac = NULL;
1811 struct ocfs2_alloc_context *xattr_ac = NULL;
1812 int want_clusters = 0;
1813 int xattr_credits = 0;
1814 struct ocfs2_security_xattr_info si = {
1817 int did_quota = 0, did_quota_inode = 0;
1818 struct ocfs2_dir_lookup_result lookup = { NULL, };
1820 int did_block_signals = 0;
1821 struct ocfs2_dentry_lock *dl = NULL;
1823 trace_ocfs2_symlink_begin(dir, dentry, symname,
1824 dentry->d_name.len, dentry->d_name.name);
1826 status = dquot_initialize(dir);
1835 l = strlen(symname) + 1;
1837 credits = ocfs2_calc_symlink_credits(sb);
1839 /* lock the parent directory */
1840 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1842 if (status != -ENOENT)
1847 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1848 if (!ocfs2_read_links_count(dirfe)) {
1849 /* can't make a file in a deleted directory. */
1854 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1855 dentry->d_name.len);
1859 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1860 dentry->d_name.name,
1861 dentry->d_name.len, &lookup);
1867 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1869 if (status != -ENOSPC)
1874 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1875 if (IS_ERR(inode)) {
1876 status = PTR_ERR(inode);
1882 /* get security xattr */
1883 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1885 if (status == -EOPNOTSUPP)
1893 /* calculate meta data/clusters for setting security xattr */
1895 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1896 &xattr_credits, &xattr_ac);
1903 /* don't reserve bitmap space for fast symlinks. */
1904 if (l > ocfs2_fast_symlink_chars(sb))
1907 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1909 if (status != -ENOSPC)
1914 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1915 if (IS_ERR(handle)) {
1916 status = PTR_ERR(handle);
1922 /* Starting to change things, restart is no longer possible. */
1923 ocfs2_block_signals(&oldset);
1924 did_block_signals = 1;
1926 status = dquot_alloc_inode(inode);
1929 did_quota_inode = 1;
1931 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1932 dentry->d_name.name,
1933 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1936 status = ocfs2_mknod_locked(osb, dir, inode,
1937 0, &new_fe_bh, parent_fe_bh, handle,
1944 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1947 inode->i_op = &ocfs2_symlink_inode_operations;
1948 inode_nohighmem(inode);
1949 if (l > ocfs2_fast_symlink_chars(sb)) {
1952 status = dquot_alloc_space_nodirty(inode,
1953 ocfs2_clusters_to_bytes(osb->sb, 1));
1957 inode->i_mapping->a_ops = &ocfs2_aops;
1958 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1960 handle, data_ac, NULL,
1963 if (status != -ENOSPC && status != -EINTR) {
1965 "Failed to extend file to %llu\n",
1966 (unsigned long long)newsize);
1972 i_size_write(inode, newsize);
1973 inode->i_blocks = ocfs2_inode_sector_count(inode);
1975 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1976 memcpy((char *) fe->id2.i_symlink, symname, l);
1977 i_size_write(inode, newsize);
1978 inode->i_blocks = 0;
1981 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1987 if (!ocfs2_inode_is_fast_symlink(inode)) {
1988 status = ocfs2_create_symlink_data(osb, handle, inode,
1997 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
2006 * Do this before adding the entry to the directory. We add
2007 * also set d_op after success so that ->d_iput() will cleanup
2008 * the dentry lock even if ocfs2_add_entry() fails below.
2010 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
2016 dl = dentry->d_fsdata;
2018 status = ocfs2_add_entry(handle, dentry, inode,
2019 le64_to_cpu(fe->i_blkno), parent_fe_bh,
2026 insert_inode_hash(inode);
2027 d_instantiate(dentry, inode);
2029 if (status < 0 && did_quota)
2030 dquot_free_space_nodirty(inode,
2031 ocfs2_clusters_to_bytes(osb->sb, 1));
2032 if (status < 0 && did_quota_inode)
2033 dquot_free_inode(inode);
2035 if (status < 0 && fe)
2036 ocfs2_set_links_count(fe, 0);
2037 ocfs2_commit_trans(osb, handle);
2040 ocfs2_inode_unlock(dir, 1);
2041 if (did_block_signals)
2042 ocfs2_unblock_signals(&oldset);
2045 brelse(parent_fe_bh);
2047 ocfs2_free_dir_lookup_result(&lookup);
2049 ocfs2_free_alloc_context(inode_ac);
2051 ocfs2_free_alloc_context(data_ac);
2053 ocfs2_free_alloc_context(xattr_ac);
2054 if ((status < 0) && inode) {
2056 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2058 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
2069 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2071 int status, namelen;
2073 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2083 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2089 trace_ocfs2_blkno_stringify(blkno, name, namelen);
2098 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2099 struct inode **ret_orphan_dir,
2100 struct buffer_head **ret_orphan_dir_bh)
2102 struct inode *orphan_dir_inode;
2103 struct buffer_head *orphan_dir_bh = NULL;
2106 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2107 ORPHAN_DIR_SYSTEM_INODE,
2109 if (!orphan_dir_inode) {
2115 inode_lock(orphan_dir_inode);
2117 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2119 inode_unlock(orphan_dir_inode);
2120 iput(orphan_dir_inode);
2126 *ret_orphan_dir = orphan_dir_inode;
2127 *ret_orphan_dir_bh = orphan_dir_bh;
2132 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2133 struct buffer_head *orphan_dir_bh,
2136 struct ocfs2_dir_lookup_result *lookup,
2140 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
2142 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2143 OCFS2_ORPHAN_NAMELEN;
2146 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2147 OCFS2_DIO_ORPHAN_PREFIX);
2148 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2154 ret = ocfs2_blkno_stringify(blkno,
2155 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2157 ret = ocfs2_blkno_stringify(blkno, name);
2163 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2164 orphan_dir_bh, name,
2175 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2176 * insertion of an orphan.
2177 * @osb: ocfs2 file system
2178 * @ret_orphan_dir: Orphan dir inode - returned locked!
2179 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2180 * @lookup: dir lookup result, to be passed back into functions like
2183 * Returns zero on success and the ret_orphan_dir, name and lookup
2184 * fields will be populated.
2186 * Returns non-zero on failure.
2188 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2189 struct inode **ret_orphan_dir,
2192 struct ocfs2_dir_lookup_result *lookup,
2195 struct inode *orphan_dir_inode = NULL;
2196 struct buffer_head *orphan_dir_bh = NULL;
2199 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2206 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2207 blkno, name, lookup, dio);
2213 *ret_orphan_dir = orphan_dir_inode;
2216 brelse(orphan_dir_bh);
2219 ocfs2_inode_unlock(orphan_dir_inode, 1);
2220 inode_unlock(orphan_dir_inode);
2221 iput(orphan_dir_inode);
2229 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2231 struct inode *inode,
2232 struct buffer_head *fe_bh,
2234 struct ocfs2_dir_lookup_result *lookup,
2235 struct inode *orphan_dir_inode,
2238 struct buffer_head *orphan_dir_bh = NULL;
2240 struct ocfs2_dinode *orphan_fe;
2241 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2243 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2244 OCFS2_ORPHAN_NAMELEN;
2246 trace_ocfs2_orphan_add_begin(
2247 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2249 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2255 status = ocfs2_journal_access_di(handle,
2256 INODE_CACHE(orphan_dir_inode),
2258 OCFS2_JOURNAL_ACCESS_WRITE);
2265 * We're going to journal the change of i_flags and i_orphaned_slot.
2266 * It's safe anyway, though some callers may duplicate the journaling.
2267 * Journaling within the func just make the logic look more
2270 status = ocfs2_journal_access_di(handle,
2273 OCFS2_JOURNAL_ACCESS_WRITE);
2279 /* we're a cluster, and nlink can change on disk from
2280 * underneath us... */
2281 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2282 if (S_ISDIR(inode->i_mode))
2283 ocfs2_add_links_count(orphan_fe, 1);
2284 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2285 ocfs2_journal_dirty(handle, orphan_dir_bh);
2287 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2289 OCFS2_I(inode)->ip_blkno,
2290 orphan_dir_bh, lookup);
2297 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2300 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2301 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2303 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2304 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2306 /* Record which orphan dir our inode now resides
2307 * in. delete_inode will use this to determine which orphan
2309 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2312 ocfs2_journal_dirty(handle, fe_bh);
2314 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2319 if (S_ISDIR(inode->i_mode))
2320 ocfs2_add_links_count(orphan_fe, -1);
2321 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2325 brelse(orphan_dir_bh);
2330 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2331 int ocfs2_orphan_del(struct ocfs2_super *osb,
2333 struct inode *orphan_dir_inode,
2334 struct inode *inode,
2335 struct buffer_head *orphan_dir_bh,
2338 char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2339 struct ocfs2_dinode *orphan_fe;
2341 struct ocfs2_dir_lookup_result lookup = { NULL, };
2344 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2345 OCFS2_DIO_ORPHAN_PREFIX);
2346 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2352 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2353 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2355 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2361 trace_ocfs2_orphan_del(
2362 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2363 name, strlen(name));
2365 status = ocfs2_journal_access_di(handle,
2366 INODE_CACHE(orphan_dir_inode),
2368 OCFS2_JOURNAL_ACCESS_WRITE);
2374 /* find it's spot in the orphan directory */
2375 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
2382 /* remove it from the orphan directory */
2383 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2389 /* do the i_nlink dance! :) */
2390 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2391 if (S_ISDIR(inode->i_mode))
2392 ocfs2_add_links_count(orphan_fe, -1);
2393 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2394 ocfs2_journal_dirty(handle, orphan_dir_bh);
2397 ocfs2_free_dir_lookup_result(&lookup);
2405 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2406 * allocated file. This is different from the typical 'add to orphan dir'
2407 * operation in that the inode does not yet exist. This is a problem because
2408 * the orphan dir stringifies the inode block number to come up with it's
2409 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2410 * problem. This function works around it by calling deeper into the orphan
2411 * and suballoc code than other callers. Use this only by necessity.
2412 * @dir: The directory which this inode will ultimately wind up under - not the
2414 * @dir_bh: buffer_head the @dir inode block
2415 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2416 * with the string to be used for orphan dirent. Pass back to the orphan dir
2418 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2420 * @ret_di_blkno: block number where the new inode will be allocated.
2421 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2422 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2424 * Returns zero on success and the ret_orphan_dir, name and lookup
2425 * fields will be populated.
2427 * Returns non-zero on failure.
2429 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2430 struct buffer_head *dir_bh,
2432 struct inode **ret_orphan_dir,
2434 struct ocfs2_dir_lookup_result *orphan_insert,
2435 struct ocfs2_alloc_context **ret_inode_ac)
2439 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2440 struct inode *orphan_dir = NULL;
2441 struct buffer_head *orphan_dir_bh = NULL;
2442 struct ocfs2_alloc_context *inode_ac = NULL;
2444 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2450 /* reserve an inode spot */
2451 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2458 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2465 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2466 di_blkno, orphan_name, orphan_insert,
2475 *ret_orphan_dir = orphan_dir;
2476 *ret_di_blkno = di_blkno;
2477 *ret_inode_ac = inode_ac;
2479 * orphan_name and orphan_insert are already up to
2480 * date via prepare_orphan_dir
2483 /* Unroll reserve_new_inode* */
2485 ocfs2_free_alloc_context(inode_ac);
2487 /* Unroll orphan dir locking */
2488 inode_unlock(orphan_dir);
2489 ocfs2_inode_unlock(orphan_dir, 1);
2493 brelse(orphan_dir_bh);
2498 int ocfs2_create_inode_in_orphan(struct inode *dir,
2500 struct inode **new_inode)
2502 int status, did_quota_inode = 0;
2503 struct inode *inode = NULL;
2504 struct inode *orphan_dir = NULL;
2505 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2506 struct ocfs2_dinode *di = NULL;
2507 handle_t *handle = NULL;
2508 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2509 struct buffer_head *parent_di_bh = NULL;
2510 struct buffer_head *new_di_bh = NULL;
2511 struct ocfs2_alloc_context *inode_ac = NULL;
2512 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2513 u64 di_blkno, suballoc_loc;
2516 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2518 if (status != -ENOENT)
2523 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2524 orphan_name, &orphan_dir,
2525 &di_blkno, &orphan_insert, &inode_ac);
2527 if (status != -ENOSPC)
2532 inode = ocfs2_get_init_inode(dir, mode);
2533 if (IS_ERR(inode)) {
2534 status = PTR_ERR(inode);
2540 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2541 if (IS_ERR(handle)) {
2542 status = PTR_ERR(handle);
2548 status = dquot_alloc_inode(inode);
2551 did_quota_inode = 1;
2553 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2555 &suballoc_bit, di_blkno);
2562 /* do the real work now. */
2563 status = __ocfs2_mknod_locked(dir, inode,
2564 0, &new_di_bh, parent_di_bh, handle,
2565 inode_ac, di_blkno, suballoc_loc,
2572 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2573 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2574 &orphan_insert, orphan_dir, false);
2580 /* get open lock so that only nodes can't remove it from orphan dir. */
2581 status = ocfs2_open_lock(inode);
2585 insert_inode_hash(inode);
2587 if (status < 0 && did_quota_inode)
2588 dquot_free_inode(inode);
2590 ocfs2_commit_trans(osb, handle);
2593 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2594 ocfs2_inode_unlock(orphan_dir, 1);
2595 inode_unlock(orphan_dir);
2599 if ((status < 0) && inode) {
2605 ocfs2_free_alloc_context(inode_ac);
2612 ocfs2_free_dir_lookup_result(&orphan_insert);
2614 ocfs2_inode_unlock(dir, 1);
2615 brelse(parent_di_bh);
2619 int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2620 struct inode *inode)
2622 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2623 struct inode *orphan_dir_inode = NULL;
2624 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2625 struct buffer_head *di_bh = NULL;
2627 handle_t *handle = NULL;
2628 struct ocfs2_dinode *di = NULL;
2630 status = ocfs2_inode_lock(inode, &di_bh, 1);
2636 di = (struct ocfs2_dinode *) di_bh->b_data;
2638 * Another append dio crashed?
2639 * If so, manually recover it first.
2641 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2642 status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode));
2644 if (status != -ENOSPC)
2646 goto bail_unlock_inode;
2649 status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0);
2652 goto bail_unlock_inode;
2656 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2657 OCFS2_I(inode)->ip_blkno,
2663 goto bail_unlock_inode;
2666 handle = ocfs2_start_trans(osb,
2667 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2668 if (IS_ERR(handle)) {
2669 status = PTR_ERR(handle);
2670 goto bail_unlock_orphan;
2673 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2674 &orphan_insert, orphan_dir_inode, true);
2678 ocfs2_commit_trans(osb, handle);
2681 ocfs2_inode_unlock(orphan_dir_inode, 1);
2682 inode_unlock(orphan_dir_inode);
2683 iput(orphan_dir_inode);
2685 ocfs2_free_dir_lookup_result(&orphan_insert);
2688 ocfs2_inode_unlock(inode, 1);
2695 int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2696 struct inode *inode, struct buffer_head *di_bh,
2697 int update_isize, loff_t end)
2699 struct inode *orphan_dir_inode = NULL;
2700 struct buffer_head *orphan_dir_bh = NULL;
2701 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2702 handle_t *handle = NULL;
2705 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2706 ORPHAN_DIR_SYSTEM_INODE,
2707 le16_to_cpu(di->i_dio_orphaned_slot));
2708 if (!orphan_dir_inode) {
2714 inode_lock(orphan_dir_inode);
2715 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2717 inode_unlock(orphan_dir_inode);
2718 iput(orphan_dir_inode);
2723 handle = ocfs2_start_trans(osb,
2724 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2725 if (IS_ERR(handle)) {
2726 status = PTR_ERR(handle);
2727 goto bail_unlock_orphan;
2730 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2732 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2733 inode, orphan_dir_bh, true);
2739 status = ocfs2_journal_access_di(handle,
2742 OCFS2_JOURNAL_ACCESS_WRITE);
2748 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2749 di->i_dio_orphaned_slot = 0;
2752 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2756 ocfs2_journal_dirty(handle, di_bh);
2759 ocfs2_commit_trans(osb, handle);
2762 ocfs2_inode_unlock(orphan_dir_inode, 1);
2763 inode_unlock(orphan_dir_inode);
2764 brelse(orphan_dir_bh);
2765 iput(orphan_dir_inode);
2771 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2772 struct inode *inode,
2773 struct dentry *dentry)
2776 struct buffer_head *parent_di_bh = NULL;
2777 handle_t *handle = NULL;
2778 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2779 struct ocfs2_dinode *dir_di, *di;
2780 struct inode *orphan_dir_inode = NULL;
2781 struct buffer_head *orphan_dir_bh = NULL;
2782 struct buffer_head *di_bh = NULL;
2783 struct ocfs2_dir_lookup_result lookup = { NULL, };
2785 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2786 dentry->d_name.len, dentry->d_name.name,
2787 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2788 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2790 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2792 if (status != -ENOENT)
2797 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2798 if (!dir_di->i_links_count) {
2799 /* can't make a file in a deleted directory. */
2804 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2805 dentry->d_name.len);
2809 /* get a spot inside the dir. */
2810 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2811 dentry->d_name.name,
2812 dentry->d_name.len, &lookup);
2818 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2819 ORPHAN_DIR_SYSTEM_INODE,
2821 if (!orphan_dir_inode) {
2827 inode_lock(orphan_dir_inode);
2829 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2832 inode_unlock(orphan_dir_inode);
2833 iput(orphan_dir_inode);
2837 status = ocfs2_read_inode_block(inode, &di_bh);
2843 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2844 if (IS_ERR(handle)) {
2845 status = PTR_ERR(handle);
2851 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2852 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2858 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2859 orphan_dir_bh, false);
2865 di = (struct ocfs2_dinode *)di_bh->b_data;
2866 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2867 di->i_orphaned_slot = 0;
2868 set_nlink(inode, 1);
2869 ocfs2_set_links_count(di, inode->i_nlink);
2870 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2871 ocfs2_journal_dirty(handle, di_bh);
2873 status = ocfs2_add_entry(handle, dentry, inode,
2874 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2881 status = ocfs2_dentry_attach_lock(dentry, inode,
2882 OCFS2_I(dir)->ip_blkno);
2888 d_instantiate(dentry, inode);
2891 ocfs2_commit_trans(osb, handle);
2893 ocfs2_inode_unlock(orphan_dir_inode, 1);
2894 inode_unlock(orphan_dir_inode);
2895 iput(orphan_dir_inode);
2898 ocfs2_inode_unlock(dir, 1);
2901 brelse(parent_di_bh);
2902 brelse(orphan_dir_bh);
2904 ocfs2_free_dir_lookup_result(&lookup);
2912 const struct inode_operations ocfs2_dir_iops = {
2913 .create = ocfs2_create,
2914 .lookup = ocfs2_lookup,
2916 .unlink = ocfs2_unlink,
2917 .rmdir = ocfs2_unlink,
2918 .symlink = ocfs2_symlink,
2919 .mkdir = ocfs2_mkdir,
2920 .mknod = ocfs2_mknod,
2921 .rename = ocfs2_rename,
2922 .setattr = ocfs2_setattr,
2923 .getattr = ocfs2_getattr,
2924 .permission = ocfs2_permission,
2925 .listxattr = ocfs2_listxattr,
2926 .fiemap = ocfs2_fiemap,
2927 .get_acl = ocfs2_iop_get_acl,
2928 .set_acl = ocfs2_iop_set_acl,