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>
45 #include <cluster/masklog.h>
53 #include "extent_map.h"
65 #include "ocfs2_trace.h"
67 #include "buffer_head_io.h"
69 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
73 struct buffer_head **new_fe_bh,
74 struct buffer_head *parent_fe_bh,
76 struct ocfs2_alloc_context *inode_ac);
78 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
79 struct inode **ret_orphan_dir,
82 struct ocfs2_dir_lookup_result *lookup);
84 static int ocfs2_orphan_add(struct ocfs2_super *osb,
87 struct buffer_head *fe_bh,
89 struct ocfs2_dir_lookup_result *lookup,
90 struct inode *orphan_dir_inode);
92 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
97 /* An orphan dir name is an 8 byte value, printed as a hex string */
98 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
100 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
105 struct inode *inode = NULL;
107 struct ocfs2_inode_info *oi;
109 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
111 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
113 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
114 ret = ERR_PTR(-ENAMETOOLONG);
118 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
120 if (status != -ENOENT)
122 ret = ERR_PTR(status);
126 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
127 dentry->d_name.len, &blkno);
131 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
133 ret = ERR_PTR(-EACCES);
138 /* Clear any orphaned state... If we were able to look up the
139 * inode from a directory, it certainly can't be orphaned. We
140 * might have the bad state from a node which intended to
141 * orphan this inode but crashed before it could commit the
143 spin_lock(&oi->ip_lock);
144 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
145 spin_unlock(&oi->ip_lock);
148 ret = d_splice_alias(inode, dentry);
152 * If d_splice_alias() finds a DCACHE_DISCONNECTED
153 * dentry, it will d_move() it on top of ourse. The
154 * return value will indicate this however, so in
155 * those cases, we switch them around for the locking
158 * NOTE: This dentry already has ->d_op set from
159 * ocfs2_get_parent() and ocfs2_get_dentry()
164 status = ocfs2_dentry_attach_lock(dentry, inode,
165 OCFS2_I(dir)->ip_blkno);
168 ret = ERR_PTR(status);
172 ocfs2_dentry_attach_gen(dentry);
175 /* Don't drop the cluster lock until *after* the d_add --
176 * unlink on another node will message us to remove that
177 * dentry under this lock so otherwise we can race this with
178 * the downconvert thread and have a stale dentry. */
179 ocfs2_inode_unlock(dir, 0);
183 trace_ocfs2_lookup_ret(ret);
188 static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
192 inode = new_inode(dir->i_sb);
194 mlog(ML_ERROR, "new_inode failed!\n");
198 /* populate as many fields early on as possible - many of
199 * these are used by the support functions here and in
203 inode_init_owner(inode, dir, mode);
204 dquot_initialize(inode);
208 static int ocfs2_mknod(struct inode *dir,
209 struct dentry *dentry,
214 struct buffer_head *parent_fe_bh = NULL;
215 handle_t *handle = NULL;
216 struct ocfs2_super *osb;
217 struct ocfs2_dinode *dirfe;
218 struct buffer_head *new_fe_bh = NULL;
219 struct inode *inode = NULL;
220 struct ocfs2_alloc_context *inode_ac = NULL;
221 struct ocfs2_alloc_context *data_ac = NULL;
222 struct ocfs2_alloc_context *meta_ac = NULL;
223 int want_clusters = 0;
225 int xattr_credits = 0;
226 struct ocfs2_security_xattr_info si = {
229 int did_quota_inode = 0;
230 struct ocfs2_dir_lookup_result lookup = { NULL, };
232 int did_block_signals = 0;
233 struct posix_acl *default_acl = NULL, *acl = NULL;
235 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
236 (unsigned long long)OCFS2_I(dir)->ip_blkno,
237 (unsigned long)dev, mode);
239 dquot_initialize(dir);
241 /* get our super block */
242 osb = OCFS2_SB(dir->i_sb);
244 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
246 if (status != -ENOENT)
251 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
256 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
257 if (!ocfs2_read_links_count(dirfe)) {
258 /* can't make a file in a deleted directory. */
263 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
268 /* get a spot inside the dir. */
269 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
271 dentry->d_name.len, &lookup);
277 /* reserve an inode spot */
278 status = ocfs2_reserve_new_inode(osb, &inode_ac);
280 if (status != -ENOSPC)
285 inode = ocfs2_get_init_inode(dir, mode);
292 /* get security xattr */
293 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
295 if (status == -EOPNOTSUPP)
303 /* calculate meta data/clusters for setting security and acl xattr */
304 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
306 &xattr_credits, &want_meta);
312 /* Reserve a cluster if creating an extent based directory. */
313 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
316 /* Dir indexing requires extra space as well */
317 if (ocfs2_supports_indexed_dirs(osb))
321 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
323 if (status != -ENOSPC)
328 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
330 if (status != -ENOSPC)
335 status = posix_acl_create(dir, &mode, &default_acl, &acl);
341 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
344 if (IS_ERR(handle)) {
345 status = PTR_ERR(handle);
351 /* Starting to change things, restart is no longer possible. */
352 ocfs2_block_signals(&oldset);
353 did_block_signals = 1;
355 status = dquot_alloc_inode(inode);
360 /* do the real work now. */
361 status = ocfs2_mknod_locked(osb, dir, inode, dev,
362 &new_fe_bh, parent_fe_bh, handle,
370 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
371 new_fe_bh, data_ac, meta_ac);
377 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
379 OCFS2_JOURNAL_ACCESS_WRITE);
384 ocfs2_add_links_count(dirfe, 1);
385 ocfs2_journal_dirty(handle, parent_fe_bh);
390 status = ocfs2_set_acl(handle, inode, new_fe_bh,
391 ACL_TYPE_DEFAULT, default_acl,
394 if (!status && acl) {
395 status = ocfs2_set_acl(handle, inode, new_fe_bh,
396 ACL_TYPE_ACCESS, acl,
406 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
415 * Do this before adding the entry to the directory. We add
416 * also set d_op after success so that ->d_iput() will cleanup
417 * the dentry lock even if ocfs2_add_entry() fails below.
419 status = ocfs2_dentry_attach_lock(dentry, inode,
420 OCFS2_I(dir)->ip_blkno);
426 status = ocfs2_add_entry(handle, dentry, inode,
427 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
434 insert_inode_hash(inode);
435 d_instantiate(dentry, inode);
439 posix_acl_release(default_acl);
441 posix_acl_release(acl);
442 if (status < 0 && did_quota_inode)
443 dquot_free_inode(inode);
445 ocfs2_commit_trans(osb, handle);
447 ocfs2_inode_unlock(dir, 1);
448 if (did_block_signals)
449 ocfs2_unblock_signals(&oldset);
452 brelse(parent_fe_bh);
456 ocfs2_free_dir_lookup_result(&lookup);
459 ocfs2_free_alloc_context(inode_ac);
462 ocfs2_free_alloc_context(data_ac);
465 ocfs2_free_alloc_context(meta_ac);
468 * We should call iput after the i_mutex of the bitmap been
469 * unlocked in ocfs2_free_alloc_context, or the
470 * ocfs2_delete_inode will mutex_lock again.
472 if ((status < 0) && inode) {
473 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
484 static int __ocfs2_mknod_locked(struct inode *dir,
487 struct buffer_head **new_fe_bh,
488 struct buffer_head *parent_fe_bh,
490 struct ocfs2_alloc_context *inode_ac,
491 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
494 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
495 struct ocfs2_dinode *fe = NULL;
496 struct ocfs2_extent_list *fel;
498 struct ocfs2_inode_info *oi = OCFS2_I(inode);
502 /* populate as many fields early on as possible - many of
503 * these are used by the support functions here and in
505 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
506 OCFS2_I(inode)->ip_blkno = fe_blkno;
507 spin_lock(&osb->osb_lock);
508 inode->i_generation = osb->s_next_generation++;
509 spin_unlock(&osb->osb_lock);
511 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
517 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
519 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
521 OCFS2_JOURNAL_ACCESS_CREATE);
527 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
528 memset(fe, 0, osb->sb->s_blocksize);
530 fe->i_generation = cpu_to_le32(inode->i_generation);
531 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
532 fe->i_blkno = cpu_to_le64(fe_blkno);
533 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
534 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
535 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
536 fe->i_uid = cpu_to_le32(i_uid_read(inode));
537 fe->i_gid = cpu_to_le32(i_gid_read(inode));
538 fe->i_mode = cpu_to_le16(inode->i_mode);
539 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
540 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
542 ocfs2_set_links_count(fe, inode->i_nlink);
544 fe->i_last_eb_blk = 0;
545 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
546 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
547 fe->i_atime = fe->i_ctime = fe->i_mtime =
548 cpu_to_le64(CURRENT_TIME.tv_sec);
549 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
550 cpu_to_le32(CURRENT_TIME.tv_nsec);
554 * If supported, directories start with inline data. If inline
555 * isn't supported, but indexing is, we start them as indexed.
557 feat = le16_to_cpu(fe->i_dyn_features);
558 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
559 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
561 fe->id2.i_data.id_count = cpu_to_le16(
562 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
564 fel = &fe->id2.i_list;
565 fel->l_tree_depth = 0;
566 fel->l_next_free_rec = 0;
567 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
570 ocfs2_journal_dirty(handle, *new_fe_bh);
572 ocfs2_populate_inode(inode, fe, 1);
573 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
574 if (!ocfs2_mount_local(osb)) {
575 status = ocfs2_create_new_inode_locks(inode);
580 oi->i_sync_tid = handle->h_transaction->t_tid;
581 oi->i_datasync_tid = handle->h_transaction->t_tid;
583 status = 0; /* error in ocfs2_create_new_inode_locks is not
599 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
603 struct buffer_head **new_fe_bh,
604 struct buffer_head *parent_fe_bh,
606 struct ocfs2_alloc_context *inode_ac)
609 u64 suballoc_loc, fe_blkno = 0;
614 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
615 inode_ac, &suballoc_loc,
616 &suballoc_bit, &fe_blkno);
622 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
623 parent_fe_bh, handle, inode_ac,
624 fe_blkno, suballoc_loc, suballoc_bit);
627 static int ocfs2_mkdir(struct inode *dir,
628 struct dentry *dentry,
633 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
634 OCFS2_I(dir)->ip_blkno, mode);
635 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
642 static int ocfs2_create(struct inode *dir,
643 struct dentry *dentry,
649 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
650 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
651 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
658 static int ocfs2_link(struct dentry *old_dentry,
660 struct dentry *dentry)
663 struct inode *inode = old_dentry->d_inode;
665 struct buffer_head *fe_bh = NULL;
666 struct buffer_head *parent_fe_bh = NULL;
667 struct ocfs2_dinode *fe = NULL;
668 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
669 struct ocfs2_dir_lookup_result lookup = { NULL, };
673 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
674 old_dentry->d_name.len, old_dentry->d_name.name,
675 dentry->d_name.len, dentry->d_name.name);
677 if (S_ISDIR(inode->i_mode))
680 dquot_initialize(dir);
682 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
694 err = ocfs2_lookup_ino_from_name(dir, old_dentry->d_name.name,
695 old_dentry->d_name.len, &old_de_ino);
702 * Check whether another node removed the source inode while we
705 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
710 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
715 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
717 dentry->d_name.len, &lookup);
723 err = ocfs2_inode_lock(inode, &fe_bh, 1);
730 fe = (struct ocfs2_dinode *) fe_bh->b_data;
731 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
733 goto out_unlock_inode;
736 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
737 if (IS_ERR(handle)) {
738 err = PTR_ERR(handle);
741 goto out_unlock_inode;
744 /* Starting to change things, restart is no longer possible. */
745 ocfs2_block_signals(&oldset);
747 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
748 OCFS2_JOURNAL_ACCESS_WRITE);
755 inode->i_ctime = CURRENT_TIME;
756 ocfs2_set_links_count(fe, inode->i_nlink);
757 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
758 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
759 ocfs2_journal_dirty(handle, fe_bh);
761 err = ocfs2_add_entry(handle, dentry, inode,
762 OCFS2_I(inode)->ip_blkno,
763 parent_fe_bh, &lookup);
765 ocfs2_add_links_count(fe, -1);
771 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
778 d_instantiate(dentry, inode);
781 ocfs2_commit_trans(osb, handle);
782 ocfs2_unblock_signals(&oldset);
784 ocfs2_inode_unlock(inode, 1);
787 ocfs2_inode_unlock(dir, 1);
790 brelse(parent_fe_bh);
792 ocfs2_free_dir_lookup_result(&lookup);
801 * Takes and drops an exclusive lock on the given dentry. This will
802 * force other nodes to drop it.
804 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
808 ret = ocfs2_dentry_lock(dentry, 1);
812 ocfs2_dentry_unlock(dentry, 1);
817 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
819 if (S_ISDIR(inode->i_mode)) {
820 if (inode->i_nlink == 2)
825 if (inode->i_nlink == 1)
830 static int ocfs2_unlink(struct inode *dir,
831 struct dentry *dentry)
834 int child_locked = 0;
835 bool is_unlinkable = false;
836 struct inode *inode = dentry->d_inode;
837 struct inode *orphan_dir = NULL;
838 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
840 struct ocfs2_dinode *fe = NULL;
841 struct buffer_head *fe_bh = NULL;
842 struct buffer_head *parent_node_bh = NULL;
843 handle_t *handle = NULL;
844 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
845 struct ocfs2_dir_lookup_result lookup = { NULL, };
846 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
848 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
850 (unsigned long long)OCFS2_I(dir)->ip_blkno,
851 (unsigned long long)OCFS2_I(inode)->ip_blkno);
853 dquot_initialize(dir);
855 BUG_ON(dentry->d_parent->d_inode != dir);
857 if (inode == osb->root_inode)
860 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
863 if (status != -ENOENT)
868 status = ocfs2_find_files_on_disk(dentry->d_name.name,
869 dentry->d_name.len, &blkno, dir,
872 if (status != -ENOENT)
877 if (OCFS2_I(inode)->ip_blkno != blkno) {
880 trace_ocfs2_unlink_noent(
881 (unsigned long long)OCFS2_I(inode)->ip_blkno,
882 (unsigned long long)blkno,
883 OCFS2_I(inode)->ip_flags);
887 status = ocfs2_inode_lock(inode, &fe_bh, 1);
889 if (status != -ENOENT)
895 if (S_ISDIR(inode->i_mode)) {
896 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
902 status = ocfs2_remote_dentry_delete(dentry);
904 /* This remote delete should succeed under all normal
910 if (ocfs2_inode_is_unlinkable(inode)) {
911 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
912 OCFS2_I(inode)->ip_blkno,
913 orphan_name, &orphan_insert);
918 is_unlinkable = true;
921 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
922 if (IS_ERR(handle)) {
923 status = PTR_ERR(handle);
929 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
930 OCFS2_JOURNAL_ACCESS_WRITE);
936 fe = (struct ocfs2_dinode *) fe_bh->b_data;
938 /* delete the name from the parent dir */
939 status = ocfs2_delete_entry(handle, dir, &lookup);
945 if (S_ISDIR(inode->i_mode))
948 ocfs2_set_links_count(fe, inode->i_nlink);
949 ocfs2_journal_dirty(handle, fe_bh);
951 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
952 if (S_ISDIR(inode->i_mode))
955 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
958 if (S_ISDIR(inode->i_mode))
964 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
965 orphan_name, &orphan_insert, orphan_dir);
972 ocfs2_commit_trans(osb, handle);
975 ocfs2_inode_unlock(inode, 1);
977 ocfs2_inode_unlock(dir, 1);
980 /* This was locked for us in ocfs2_prepare_orphan_dir() */
981 ocfs2_inode_unlock(orphan_dir, 1);
982 mutex_unlock(&orphan_dir->i_mutex);
987 brelse(parent_node_bh);
989 ocfs2_free_dir_lookup_result(&orphan_insert);
990 ocfs2_free_dir_lookup_result(&lookup);
992 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
999 * The only place this should be used is rename!
1000 * if they have the same id, then the 1st one is the only one locked.
1002 static int ocfs2_double_lock(struct ocfs2_super *osb,
1003 struct buffer_head **bh1,
1004 struct inode *inode1,
1005 struct buffer_head **bh2,
1006 struct inode *inode2)
1009 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1010 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1011 struct buffer_head **tmpbh;
1012 struct inode *tmpinode;
1014 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1015 (unsigned long long)oi2->ip_blkno);
1022 /* we always want to lock the one with the lower lockid first. */
1023 if (oi1->ip_blkno != oi2->ip_blkno) {
1024 if (oi1->ip_blkno < oi2->ip_blkno) {
1025 /* switch id1 and id2 around */
1035 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1038 if (status != -ENOENT)
1045 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
1048 * An error return must mean that no cluster locks
1049 * were held on function exit.
1051 if (oi1->ip_blkno != oi2->ip_blkno) {
1052 ocfs2_inode_unlock(inode2, 1);
1057 if (status != -ENOENT)
1061 trace_ocfs2_double_lock_end(
1062 (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1063 (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1071 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1073 ocfs2_inode_unlock(inode1, 1);
1075 if (inode1 != inode2)
1076 ocfs2_inode_unlock(inode2, 1);
1079 static int ocfs2_rename(struct inode *old_dir,
1080 struct dentry *old_dentry,
1081 struct inode *new_dir,
1082 struct dentry *new_dentry)
1084 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1085 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1086 struct inode *old_inode = old_dentry->d_inode;
1087 struct inode *new_inode = new_dentry->d_inode;
1088 struct inode *orphan_dir = NULL;
1089 struct ocfs2_dinode *newfe = NULL;
1090 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1091 struct buffer_head *newfe_bh = NULL;
1092 struct buffer_head *old_inode_bh = NULL;
1093 struct ocfs2_super *osb = NULL;
1094 u64 newfe_blkno, old_de_ino;
1095 handle_t *handle = NULL;
1096 struct buffer_head *old_dir_bh = NULL;
1097 struct buffer_head *new_dir_bh = NULL;
1098 u32 old_dir_nlink = old_dir->i_nlink;
1099 struct ocfs2_dinode *old_di;
1100 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1101 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1102 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1103 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1104 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1106 /* At some point it might be nice to break this function up a
1109 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1110 old_dentry->d_name.len, old_dentry->d_name.name,
1111 new_dentry->d_name.len, new_dentry->d_name.name);
1113 dquot_initialize(old_dir);
1114 dquot_initialize(new_dir);
1116 osb = OCFS2_SB(old_dir->i_sb);
1119 if (!igrab(new_inode))
1123 /* Assume a directory hierarchy thusly:
1126 * a,b,c, and d are all directories.
1128 * from cwd of 'a' on both nodes:
1132 * And that's why, just like the VFS, we need a file system
1134 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1135 status = ocfs2_rename_lock(osb);
1143 /* if old and new are the same, this'll just do one lock. */
1144 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1145 &new_dir_bh, new_dir);
1152 /* make sure both dirs have bhs
1153 * get an extra ref on old_dir_bh if old==new */
1156 new_dir_bh = old_dir_bh;
1159 mlog(ML_ERROR, "no old_dir_bh!\n");
1166 * Aside from allowing a meta data update, the locking here
1167 * also ensures that the downconvert thread on other nodes
1168 * won't have to concurrently downconvert the inode and the
1171 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1174 if (status != -ENOENT)
1178 old_child_locked = 1;
1180 status = ocfs2_remote_dentry_delete(old_dentry);
1186 if (S_ISDIR(old_inode->i_mode)) {
1187 u64 old_inode_parent;
1190 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1192 &old_inode_dot_dot_res);
1198 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1203 if (!new_inode && new_dir != old_dir &&
1204 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1210 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1211 old_dentry->d_name.len,
1219 * Check for inode number is _not_ due to possible IO errors.
1220 * We might rmdir the source, keep it as pwd of some process
1221 * and merrily kill the link to whatever was created under the
1222 * same name. Goodbye sticky bit ;-<
1224 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1229 /* check if the target already exists (in which case we need
1231 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1232 new_dentry->d_name.len,
1233 &newfe_blkno, new_dir,
1234 &target_lookup_res);
1235 /* The only error we allow here is -ENOENT because the new
1236 * file not existing is perfectly valid. */
1237 if ((status < 0) && (status != -ENOENT)) {
1238 /* If we cannot find the file specified we should just */
1239 /* return the error... */
1246 if (!target_exists && new_inode) {
1248 * Target was unlinked by another node while we were
1249 * waiting to get to ocfs2_rename(). There isn't
1250 * anything we can do here to help the situation, so
1251 * bubble up the appropriate error.
1257 /* In case we need to overwrite an existing file, we blow it
1259 if (target_exists) {
1260 /* VFS didn't think there existed an inode here, but
1261 * someone else in the cluster must have raced our
1262 * rename to create one. Today we error cleanly, in
1263 * the future we should consider calling iget to build
1264 * a new struct inode for this entry. */
1268 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1269 new_dentry->d_name.name);
1273 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1276 trace_ocfs2_rename_disagree(
1277 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1278 (unsigned long long)newfe_blkno,
1279 OCFS2_I(new_inode)->ip_flags);
1283 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1285 if (status != -ENOENT)
1289 new_child_locked = 1;
1291 status = ocfs2_remote_dentry_delete(new_dentry);
1297 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1299 trace_ocfs2_rename_over_existing(
1300 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1301 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1303 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1304 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1305 OCFS2_I(new_inode)->ip_blkno,
1306 orphan_name, &orphan_insert);
1313 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1315 status = ocfs2_check_dir_for_entry(new_dir,
1316 new_dentry->d_name.name,
1317 new_dentry->d_name.len);
1321 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1322 new_dentry->d_name.name,
1323 new_dentry->d_name.len,
1331 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1332 if (IS_ERR(handle)) {
1333 status = PTR_ERR(handle);
1339 if (target_exists) {
1340 if (S_ISDIR(new_inode->i_mode)) {
1341 if (new_inode->i_nlink != 2 ||
1342 !ocfs2_empty_dir(new_inode)) {
1343 status = -ENOTEMPTY;
1347 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1349 OCFS2_JOURNAL_ACCESS_WRITE);
1355 if (S_ISDIR(new_inode->i_mode) ||
1356 (ocfs2_read_links_count(newfe) == 1)) {
1357 status = ocfs2_orphan_add(osb, handle, new_inode,
1358 newfe_bh, orphan_name,
1359 &orphan_insert, orphan_dir);
1366 /* change the dirent to point to the correct inode */
1367 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1373 new_dir->i_version++;
1375 if (S_ISDIR(new_inode->i_mode))
1376 ocfs2_set_links_count(newfe, 0);
1378 ocfs2_add_links_count(newfe, -1);
1379 ocfs2_journal_dirty(handle, newfe_bh);
1381 /* if the name was not found in new_dir, add it now */
1382 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1383 OCFS2_I(old_inode)->ip_blkno,
1384 new_dir_bh, &target_insert);
1387 old_inode->i_ctime = CURRENT_TIME;
1388 mark_inode_dirty(old_inode);
1390 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1392 OCFS2_JOURNAL_ACCESS_WRITE);
1394 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1396 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1397 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1398 ocfs2_journal_dirty(handle, old_inode_bh);
1403 * Now that the name has been added to new_dir, remove the old name.
1405 * We don't keep any directory entry context around until now
1406 * because the insert might have changed the type of directory
1407 * we're dealing with.
1409 status = ocfs2_find_entry(old_dentry->d_name.name,
1410 old_dentry->d_name.len, old_dir,
1415 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1422 drop_nlink(new_inode);
1423 new_inode->i_ctime = CURRENT_TIME;
1425 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1427 if (update_dot_dot) {
1428 status = ocfs2_update_entry(old_inode, handle,
1429 &old_inode_dot_dot_res, new_dir);
1430 drop_nlink(old_dir);
1432 drop_nlink(new_inode);
1435 mark_inode_dirty(new_dir);
1438 mark_inode_dirty(old_dir);
1439 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1441 mark_inode_dirty(new_inode);
1442 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1445 if (old_dir != new_dir) {
1446 /* Keep the same times on both directories.*/
1447 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1450 * This will also pick up the i_nlink change from the
1453 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1456 if (old_dir_nlink != old_dir->i_nlink) {
1458 mlog(ML_ERROR, "need to change nlink for old dir "
1459 "%llu from %d to %d but bh is NULL!\n",
1460 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1461 (int)old_dir_nlink, old_dir->i_nlink);
1463 struct ocfs2_dinode *fe;
1464 status = ocfs2_journal_access_di(handle,
1465 INODE_CACHE(old_dir),
1467 OCFS2_JOURNAL_ACCESS_WRITE);
1468 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1469 ocfs2_set_links_count(fe, old_dir->i_nlink);
1470 ocfs2_journal_dirty(handle, old_dir_bh);
1473 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1477 ocfs2_rename_unlock(osb);
1480 ocfs2_commit_trans(osb, handle);
1483 ocfs2_double_unlock(old_dir, new_dir);
1485 if (old_child_locked)
1486 ocfs2_inode_unlock(old_inode, 1);
1488 if (new_child_locked)
1489 ocfs2_inode_unlock(new_inode, 1);
1492 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1493 ocfs2_inode_unlock(orphan_dir, 1);
1494 mutex_unlock(&orphan_dir->i_mutex);
1499 sync_mapping_buffers(old_inode->i_mapping);
1504 ocfs2_free_dir_lookup_result(&target_lookup_res);
1505 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1506 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1507 ocfs2_free_dir_lookup_result(&orphan_insert);
1508 ocfs2_free_dir_lookup_result(&target_insert);
1511 brelse(old_inode_bh);
1522 * we expect i_size = strlen(symname). Copy symname into the file
1523 * data, including the null terminator.
1525 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1527 struct inode *inode,
1528 const char *symname)
1530 struct buffer_head **bhs = NULL;
1532 struct super_block *sb = osb->sb;
1533 u64 p_blkno, p_blocks;
1534 int virtual, blocks, status, i, bytes_left;
1536 bytes_left = i_size_read(inode) + 1;
1537 /* we can't trust i_blocks because we're actually going to
1538 * write i_size + 1 bytes. */
1539 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1541 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1542 i_size_read(inode), blocks);
1544 /* Sanity check -- make sure we're going to fit. */
1546 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1552 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1559 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1566 /* links can never be larger than one cluster so we know this
1567 * is all going to be contiguous, but do a sanity check
1569 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1576 while(bytes_left > 0) {
1577 c = &symname[virtual * sb->s_blocksize];
1579 bhs[virtual] = sb_getblk(sb, p_blkno);
1580 if (!bhs[virtual]) {
1585 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1588 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1590 OCFS2_JOURNAL_ACCESS_CREATE);
1596 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1598 memcpy(bhs[virtual]->b_data, c,
1599 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1602 ocfs2_journal_dirty(handle, bhs[virtual]);
1606 bytes_left -= sb->s_blocksize;
1613 for(i = 0; i < blocks; i++)
1623 static int ocfs2_symlink(struct inode *dir,
1624 struct dentry *dentry,
1625 const char *symname)
1627 int status, l, credits;
1629 struct ocfs2_super *osb = NULL;
1630 struct inode *inode = NULL;
1631 struct super_block *sb;
1632 struct buffer_head *new_fe_bh = NULL;
1633 struct buffer_head *parent_fe_bh = NULL;
1634 struct ocfs2_dinode *fe = NULL;
1635 struct ocfs2_dinode *dirfe;
1636 handle_t *handle = NULL;
1637 struct ocfs2_alloc_context *inode_ac = NULL;
1638 struct ocfs2_alloc_context *data_ac = NULL;
1639 struct ocfs2_alloc_context *xattr_ac = NULL;
1640 int want_clusters = 0;
1641 int xattr_credits = 0;
1642 struct ocfs2_security_xattr_info si = {
1645 int did_quota = 0, did_quota_inode = 0;
1646 struct ocfs2_dir_lookup_result lookup = { NULL, };
1648 int did_block_signals = 0;
1650 trace_ocfs2_symlink_begin(dir, dentry, symname,
1651 dentry->d_name.len, dentry->d_name.name);
1653 dquot_initialize(dir);
1658 l = strlen(symname) + 1;
1660 credits = ocfs2_calc_symlink_credits(sb);
1662 /* lock the parent directory */
1663 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1665 if (status != -ENOENT)
1670 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1671 if (!ocfs2_read_links_count(dirfe)) {
1672 /* can't make a file in a deleted directory. */
1677 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1678 dentry->d_name.len);
1682 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1683 dentry->d_name.name,
1684 dentry->d_name.len, &lookup);
1690 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1692 if (status != -ENOSPC)
1697 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1704 /* get security xattr */
1705 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1707 if (status == -EOPNOTSUPP)
1715 /* calculate meta data/clusters for setting security xattr */
1717 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1718 &xattr_credits, &xattr_ac);
1725 /* don't reserve bitmap space for fast symlinks. */
1726 if (l > ocfs2_fast_symlink_chars(sb))
1729 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1731 if (status != -ENOSPC)
1736 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1737 if (IS_ERR(handle)) {
1738 status = PTR_ERR(handle);
1744 /* Starting to change things, restart is no longer possible. */
1745 ocfs2_block_signals(&oldset);
1746 did_block_signals = 1;
1748 status = dquot_alloc_inode(inode);
1751 did_quota_inode = 1;
1753 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1754 dentry->d_name.name,
1755 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1758 status = ocfs2_mknod_locked(osb, dir, inode,
1759 0, &new_fe_bh, parent_fe_bh, handle,
1766 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1769 inode->i_op = &ocfs2_symlink_inode_operations;
1770 if (l > ocfs2_fast_symlink_chars(sb)) {
1773 status = dquot_alloc_space_nodirty(inode,
1774 ocfs2_clusters_to_bytes(osb->sb, 1));
1778 inode->i_mapping->a_ops = &ocfs2_aops;
1779 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1781 handle, data_ac, NULL,
1784 if (status != -ENOSPC && status != -EINTR) {
1786 "Failed to extend file to %llu\n",
1787 (unsigned long long)newsize);
1793 i_size_write(inode, newsize);
1794 inode->i_blocks = ocfs2_inode_sector_count(inode);
1796 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1797 memcpy((char *) fe->id2.i_symlink, symname, l);
1798 i_size_write(inode, newsize);
1799 inode->i_blocks = 0;
1802 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1808 if (!ocfs2_inode_is_fast_symlink(inode)) {
1809 status = ocfs2_create_symlink_data(osb, handle, inode,
1818 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1827 * Do this before adding the entry to the directory. We add
1828 * also set d_op after success so that ->d_iput() will cleanup
1829 * the dentry lock even if ocfs2_add_entry() fails below.
1831 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1837 status = ocfs2_add_entry(handle, dentry, inode,
1838 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1845 insert_inode_hash(inode);
1846 d_instantiate(dentry, inode);
1848 if (status < 0 && did_quota)
1849 dquot_free_space_nodirty(inode,
1850 ocfs2_clusters_to_bytes(osb->sb, 1));
1851 if (status < 0 && did_quota_inode)
1852 dquot_free_inode(inode);
1854 ocfs2_commit_trans(osb, handle);
1856 ocfs2_inode_unlock(dir, 1);
1857 if (did_block_signals)
1858 ocfs2_unblock_signals(&oldset);
1861 brelse(parent_fe_bh);
1864 ocfs2_free_dir_lookup_result(&lookup);
1866 ocfs2_free_alloc_context(inode_ac);
1868 ocfs2_free_alloc_context(data_ac);
1870 ocfs2_free_alloc_context(xattr_ac);
1871 if ((status < 0) && inode) {
1872 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
1883 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1885 int status, namelen;
1887 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1897 if (namelen != OCFS2_ORPHAN_NAMELEN) {
1903 trace_ocfs2_blkno_stringify(blkno, name, namelen);
1912 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
1913 struct inode **ret_orphan_dir,
1914 struct buffer_head **ret_orphan_dir_bh)
1916 struct inode *orphan_dir_inode;
1917 struct buffer_head *orphan_dir_bh = NULL;
1920 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1921 ORPHAN_DIR_SYSTEM_INODE,
1923 if (!orphan_dir_inode) {
1929 mutex_lock(&orphan_dir_inode->i_mutex);
1931 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1933 mutex_unlock(&orphan_dir_inode->i_mutex);
1934 iput(orphan_dir_inode);
1940 *ret_orphan_dir = orphan_dir_inode;
1941 *ret_orphan_dir_bh = orphan_dir_bh;
1946 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
1947 struct buffer_head *orphan_dir_bh,
1950 struct ocfs2_dir_lookup_result *lookup)
1953 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
1955 ret = ocfs2_blkno_stringify(blkno, name);
1961 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1962 orphan_dir_bh, name,
1963 OCFS2_ORPHAN_NAMELEN, lookup);
1973 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
1974 * insertion of an orphan.
1975 * @osb: ocfs2 file system
1976 * @ret_orphan_dir: Orphan dir inode - returned locked!
1977 * @blkno: Actual block number of the inode to be inserted into orphan dir.
1978 * @lookup: dir lookup result, to be passed back into functions like
1981 * Returns zero on success and the ret_orphan_dir, name and lookup
1982 * fields will be populated.
1984 * Returns non-zero on failure.
1986 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1987 struct inode **ret_orphan_dir,
1990 struct ocfs2_dir_lookup_result *lookup)
1992 struct inode *orphan_dir_inode = NULL;
1993 struct buffer_head *orphan_dir_bh = NULL;
1996 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2003 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
2004 blkno, name, lookup);
2010 *ret_orphan_dir = orphan_dir_inode;
2013 brelse(orphan_dir_bh);
2016 ocfs2_inode_unlock(orphan_dir_inode, 1);
2017 mutex_unlock(&orphan_dir_inode->i_mutex);
2018 iput(orphan_dir_inode);
2026 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2028 struct inode *inode,
2029 struct buffer_head *fe_bh,
2031 struct ocfs2_dir_lookup_result *lookup,
2032 struct inode *orphan_dir_inode)
2034 struct buffer_head *orphan_dir_bh = NULL;
2036 struct ocfs2_dinode *orphan_fe;
2037 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2039 trace_ocfs2_orphan_add_begin(
2040 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2042 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2048 status = ocfs2_journal_access_di(handle,
2049 INODE_CACHE(orphan_dir_inode),
2051 OCFS2_JOURNAL_ACCESS_WRITE);
2058 * We're going to journal the change of i_flags and i_orphaned_slot.
2059 * It's safe anyway, though some callers may duplicate the journaling.
2060 * Journaling within the func just make the logic look more
2063 status = ocfs2_journal_access_di(handle,
2066 OCFS2_JOURNAL_ACCESS_WRITE);
2072 /* we're a cluster, and nlink can change on disk from
2073 * underneath us... */
2074 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2075 if (S_ISDIR(inode->i_mode))
2076 ocfs2_add_links_count(orphan_fe, 1);
2077 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2078 ocfs2_journal_dirty(handle, orphan_dir_bh);
2080 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2081 OCFS2_ORPHAN_NAMELEN, inode,
2082 OCFS2_I(inode)->ip_blkno,
2083 orphan_dir_bh, lookup);
2089 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2090 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2092 /* Record which orphan dir our inode now resides
2093 * in. delete_inode will use this to determine which orphan
2095 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2097 ocfs2_journal_dirty(handle, fe_bh);
2099 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2104 if (S_ISDIR(inode->i_mode))
2105 ocfs2_add_links_count(orphan_fe, -1);
2106 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2110 brelse(orphan_dir_bh);
2115 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2116 int ocfs2_orphan_del(struct ocfs2_super *osb,
2118 struct inode *orphan_dir_inode,
2119 struct inode *inode,
2120 struct buffer_head *orphan_dir_bh)
2122 char name[OCFS2_ORPHAN_NAMELEN + 1];
2123 struct ocfs2_dinode *orphan_fe;
2125 struct ocfs2_dir_lookup_result lookup = { NULL, };
2127 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2133 trace_ocfs2_orphan_del(
2134 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2135 name, OCFS2_ORPHAN_NAMELEN);
2137 /* find it's spot in the orphan directory */
2138 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2145 /* remove it from the orphan directory */
2146 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2152 status = ocfs2_journal_access_di(handle,
2153 INODE_CACHE(orphan_dir_inode),
2155 OCFS2_JOURNAL_ACCESS_WRITE);
2161 /* do the i_nlink dance! :) */
2162 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2163 if (S_ISDIR(inode->i_mode))
2164 ocfs2_add_links_count(orphan_fe, -1);
2165 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2166 ocfs2_journal_dirty(handle, orphan_dir_bh);
2169 ocfs2_free_dir_lookup_result(&lookup);
2177 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2178 * allocated file. This is different from the typical 'add to orphan dir'
2179 * operation in that the inode does not yet exist. This is a problem because
2180 * the orphan dir stringifies the inode block number to come up with it's
2181 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2182 * problem. This function works around it by calling deeper into the orphan
2183 * and suballoc code than other callers. Use this only by necessity.
2184 * @dir: The directory which this inode will ultimately wind up under - not the
2186 * @dir_bh: buffer_head the @dir inode block
2187 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2188 * with the string to be used for orphan dirent. Pass back to the orphan dir
2190 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2192 * @ret_di_blkno: block number where the new inode will be allocated.
2193 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2194 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2196 * Returns zero on success and the ret_orphan_dir, name and lookup
2197 * fields will be populated.
2199 * Returns non-zero on failure.
2201 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2202 struct buffer_head *dir_bh,
2204 struct inode **ret_orphan_dir,
2206 struct ocfs2_dir_lookup_result *orphan_insert,
2207 struct ocfs2_alloc_context **ret_inode_ac)
2211 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2212 struct inode *orphan_dir = NULL;
2213 struct buffer_head *orphan_dir_bh = NULL;
2214 struct ocfs2_alloc_context *inode_ac = NULL;
2216 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2222 /* reserve an inode spot */
2223 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2230 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2237 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2238 di_blkno, orphan_name, orphan_insert);
2246 *ret_orphan_dir = orphan_dir;
2247 *ret_di_blkno = di_blkno;
2248 *ret_inode_ac = inode_ac;
2250 * orphan_name and orphan_insert are already up to
2251 * date via prepare_orphan_dir
2254 /* Unroll reserve_new_inode* */
2256 ocfs2_free_alloc_context(inode_ac);
2258 /* Unroll orphan dir locking */
2259 mutex_unlock(&orphan_dir->i_mutex);
2260 ocfs2_inode_unlock(orphan_dir, 1);
2264 brelse(orphan_dir_bh);
2269 int ocfs2_create_inode_in_orphan(struct inode *dir,
2271 struct inode **new_inode)
2273 int status, did_quota_inode = 0;
2274 struct inode *inode = NULL;
2275 struct inode *orphan_dir = NULL;
2276 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2277 struct ocfs2_dinode *di = NULL;
2278 handle_t *handle = NULL;
2279 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2280 struct buffer_head *parent_di_bh = NULL;
2281 struct buffer_head *new_di_bh = NULL;
2282 struct ocfs2_alloc_context *inode_ac = NULL;
2283 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2284 u64 uninitialized_var(di_blkno), suballoc_loc;
2287 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2289 if (status != -ENOENT)
2294 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2295 orphan_name, &orphan_dir,
2296 &di_blkno, &orphan_insert, &inode_ac);
2298 if (status != -ENOSPC)
2303 inode = ocfs2_get_init_inode(dir, mode);
2310 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2311 if (IS_ERR(handle)) {
2312 status = PTR_ERR(handle);
2318 status = dquot_alloc_inode(inode);
2321 did_quota_inode = 1;
2323 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2325 &suballoc_bit, di_blkno);
2332 /* do the real work now. */
2333 status = __ocfs2_mknod_locked(dir, inode,
2334 0, &new_di_bh, parent_di_bh, handle,
2335 inode_ac, di_blkno, suballoc_loc,
2342 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2343 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2344 &orphan_insert, orphan_dir);
2350 /* get open lock so that only nodes can't remove it from orphan dir. */
2351 status = ocfs2_open_lock(inode);
2355 insert_inode_hash(inode);
2357 if (status < 0 && did_quota_inode)
2358 dquot_free_inode(inode);
2360 ocfs2_commit_trans(osb, handle);
2363 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2364 ocfs2_inode_unlock(orphan_dir, 1);
2365 mutex_unlock(&orphan_dir->i_mutex);
2369 if ((status < 0) && inode) {
2375 ocfs2_free_alloc_context(inode_ac);
2382 ocfs2_free_dir_lookup_result(&orphan_insert);
2384 ocfs2_inode_unlock(dir, 1);
2385 brelse(parent_di_bh);
2389 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2390 struct inode *inode,
2391 struct dentry *dentry)
2394 struct buffer_head *parent_di_bh = NULL;
2395 handle_t *handle = NULL;
2396 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2397 struct ocfs2_dinode *dir_di, *di;
2398 struct inode *orphan_dir_inode = NULL;
2399 struct buffer_head *orphan_dir_bh = NULL;
2400 struct buffer_head *di_bh = NULL;
2401 struct ocfs2_dir_lookup_result lookup = { NULL, };
2403 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2404 dentry->d_name.len, dentry->d_name.name,
2405 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2406 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2408 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2410 if (status != -ENOENT)
2415 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2416 if (!dir_di->i_links_count) {
2417 /* can't make a file in a deleted directory. */
2422 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2423 dentry->d_name.len);
2427 /* get a spot inside the dir. */
2428 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2429 dentry->d_name.name,
2430 dentry->d_name.len, &lookup);
2436 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2437 ORPHAN_DIR_SYSTEM_INODE,
2439 if (!orphan_dir_inode) {
2445 mutex_lock(&orphan_dir_inode->i_mutex);
2447 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2450 mutex_unlock(&orphan_dir_inode->i_mutex);
2451 iput(orphan_dir_inode);
2455 status = ocfs2_read_inode_block(inode, &di_bh);
2461 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2462 if (IS_ERR(handle)) {
2463 status = PTR_ERR(handle);
2469 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2470 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2476 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2483 di = (struct ocfs2_dinode *)di_bh->b_data;
2484 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2485 di->i_orphaned_slot = 0;
2486 set_nlink(inode, 1);
2487 ocfs2_set_links_count(di, inode->i_nlink);
2488 ocfs2_journal_dirty(handle, di_bh);
2490 status = ocfs2_add_entry(handle, dentry, inode,
2491 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2498 status = ocfs2_dentry_attach_lock(dentry, inode,
2499 OCFS2_I(dir)->ip_blkno);
2505 d_instantiate(dentry, inode);
2508 ocfs2_commit_trans(osb, handle);
2510 ocfs2_inode_unlock(orphan_dir_inode, 1);
2511 mutex_unlock(&orphan_dir_inode->i_mutex);
2512 iput(orphan_dir_inode);
2515 ocfs2_inode_unlock(dir, 1);
2518 brelse(parent_di_bh);
2519 brelse(orphan_dir_bh);
2521 ocfs2_free_dir_lookup_result(&lookup);
2529 const struct inode_operations ocfs2_dir_iops = {
2530 .create = ocfs2_create,
2531 .lookup = ocfs2_lookup,
2533 .unlink = ocfs2_unlink,
2534 .rmdir = ocfs2_unlink,
2535 .symlink = ocfs2_symlink,
2536 .mkdir = ocfs2_mkdir,
2537 .mknod = ocfs2_mknod,
2538 .rename = ocfs2_rename,
2539 .setattr = ocfs2_setattr,
2540 .getattr = ocfs2_getattr,
2541 .permission = ocfs2_permission,
2542 .setxattr = generic_setxattr,
2543 .getxattr = generic_getxattr,
2544 .listxattr = ocfs2_listxattr,
2545 .removexattr = generic_removexattr,
2546 .fiemap = ocfs2_fiemap,
2547 .get_acl = ocfs2_iop_get_acl,
2548 .set_acl = ocfs2_iop_set_acl,