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;
501 /* populate as many fields early on as possible - many of
502 * these are used by the support functions here and in
504 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
505 OCFS2_I(inode)->ip_blkno = fe_blkno;
506 spin_lock(&osb->osb_lock);
507 inode->i_generation = osb->s_next_generation++;
508 spin_unlock(&osb->osb_lock);
510 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
516 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
518 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
520 OCFS2_JOURNAL_ACCESS_CREATE);
526 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
527 memset(fe, 0, osb->sb->s_blocksize);
529 fe->i_generation = cpu_to_le32(inode->i_generation);
530 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
531 fe->i_blkno = cpu_to_le64(fe_blkno);
532 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
533 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
534 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
535 fe->i_uid = cpu_to_le32(i_uid_read(inode));
536 fe->i_gid = cpu_to_le32(i_gid_read(inode));
537 fe->i_mode = cpu_to_le16(inode->i_mode);
538 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
539 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
541 ocfs2_set_links_count(fe, inode->i_nlink);
543 fe->i_last_eb_blk = 0;
544 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
545 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
546 fe->i_atime = fe->i_ctime = fe->i_mtime =
547 cpu_to_le64(CURRENT_TIME.tv_sec);
548 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
549 cpu_to_le32(CURRENT_TIME.tv_nsec);
553 * If supported, directories start with inline data. If inline
554 * isn't supported, but indexing is, we start them as indexed.
556 feat = le16_to_cpu(fe->i_dyn_features);
557 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
558 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
560 fe->id2.i_data.id_count = cpu_to_le16(
561 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
563 fel = &fe->id2.i_list;
564 fel->l_tree_depth = 0;
565 fel->l_next_free_rec = 0;
566 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
569 ocfs2_journal_dirty(handle, *new_fe_bh);
571 ocfs2_populate_inode(inode, fe, 1);
572 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
573 if (!ocfs2_mount_local(osb)) {
574 status = ocfs2_create_new_inode_locks(inode);
579 status = 0; /* error in ocfs2_create_new_inode_locks is not
595 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
599 struct buffer_head **new_fe_bh,
600 struct buffer_head *parent_fe_bh,
602 struct ocfs2_alloc_context *inode_ac)
605 u64 suballoc_loc, fe_blkno = 0;
610 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
611 inode_ac, &suballoc_loc,
612 &suballoc_bit, &fe_blkno);
618 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
619 parent_fe_bh, handle, inode_ac,
620 fe_blkno, suballoc_loc, suballoc_bit);
623 static int ocfs2_mkdir(struct inode *dir,
624 struct dentry *dentry,
629 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
630 OCFS2_I(dir)->ip_blkno, mode);
631 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
638 static int ocfs2_create(struct inode *dir,
639 struct dentry *dentry,
645 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
646 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
647 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
654 static int ocfs2_link(struct dentry *old_dentry,
656 struct dentry *dentry)
659 struct inode *inode = old_dentry->d_inode;
661 struct buffer_head *fe_bh = NULL;
662 struct buffer_head *parent_fe_bh = NULL;
663 struct ocfs2_dinode *fe = NULL;
664 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
665 struct ocfs2_dir_lookup_result lookup = { NULL, };
668 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
669 old_dentry->d_name.len, old_dentry->d_name.name,
670 dentry->d_name.len, dentry->d_name.name);
672 if (S_ISDIR(inode->i_mode))
675 dquot_initialize(dir);
677 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
689 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
694 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
696 dentry->d_name.len, &lookup);
702 err = ocfs2_inode_lock(inode, &fe_bh, 1);
709 fe = (struct ocfs2_dinode *) fe_bh->b_data;
710 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
712 goto out_unlock_inode;
715 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
716 if (IS_ERR(handle)) {
717 err = PTR_ERR(handle);
720 goto out_unlock_inode;
723 /* Starting to change things, restart is no longer possible. */
724 ocfs2_block_signals(&oldset);
726 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
727 OCFS2_JOURNAL_ACCESS_WRITE);
734 inode->i_ctime = CURRENT_TIME;
735 ocfs2_set_links_count(fe, inode->i_nlink);
736 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
737 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
738 ocfs2_journal_dirty(handle, fe_bh);
740 err = ocfs2_add_entry(handle, dentry, inode,
741 OCFS2_I(inode)->ip_blkno,
742 parent_fe_bh, &lookup);
744 ocfs2_add_links_count(fe, -1);
750 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
757 d_instantiate(dentry, inode);
760 ocfs2_commit_trans(osb, handle);
761 ocfs2_unblock_signals(&oldset);
763 ocfs2_inode_unlock(inode, 1);
766 ocfs2_inode_unlock(dir, 1);
769 brelse(parent_fe_bh);
771 ocfs2_free_dir_lookup_result(&lookup);
780 * Takes and drops an exclusive lock on the given dentry. This will
781 * force other nodes to drop it.
783 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
787 ret = ocfs2_dentry_lock(dentry, 1);
791 ocfs2_dentry_unlock(dentry, 1);
796 static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
798 if (S_ISDIR(inode->i_mode)) {
799 if (inode->i_nlink == 2)
804 if (inode->i_nlink == 1)
809 static int ocfs2_unlink(struct inode *dir,
810 struct dentry *dentry)
813 int child_locked = 0;
814 bool is_unlinkable = false;
815 struct inode *inode = dentry->d_inode;
816 struct inode *orphan_dir = NULL;
817 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
819 struct ocfs2_dinode *fe = NULL;
820 struct buffer_head *fe_bh = NULL;
821 struct buffer_head *parent_node_bh = NULL;
822 handle_t *handle = NULL;
823 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
824 struct ocfs2_dir_lookup_result lookup = { NULL, };
825 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
827 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
829 (unsigned long long)OCFS2_I(dir)->ip_blkno,
830 (unsigned long long)OCFS2_I(inode)->ip_blkno);
832 dquot_initialize(dir);
834 BUG_ON(dentry->d_parent->d_inode != dir);
836 if (inode == osb->root_inode)
839 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
842 if (status != -ENOENT)
847 status = ocfs2_find_files_on_disk(dentry->d_name.name,
848 dentry->d_name.len, &blkno, dir,
851 if (status != -ENOENT)
856 if (OCFS2_I(inode)->ip_blkno != blkno) {
859 trace_ocfs2_unlink_noent(
860 (unsigned long long)OCFS2_I(inode)->ip_blkno,
861 (unsigned long long)blkno,
862 OCFS2_I(inode)->ip_flags);
866 status = ocfs2_inode_lock(inode, &fe_bh, 1);
868 if (status != -ENOENT)
874 if (S_ISDIR(inode->i_mode)) {
875 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
881 status = ocfs2_remote_dentry_delete(dentry);
883 /* This remote delete should succeed under all normal
889 if (ocfs2_inode_is_unlinkable(inode)) {
890 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
891 OCFS2_I(inode)->ip_blkno,
892 orphan_name, &orphan_insert);
897 is_unlinkable = true;
900 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
901 if (IS_ERR(handle)) {
902 status = PTR_ERR(handle);
908 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
909 OCFS2_JOURNAL_ACCESS_WRITE);
915 fe = (struct ocfs2_dinode *) fe_bh->b_data;
917 /* delete the name from the parent dir */
918 status = ocfs2_delete_entry(handle, dir, &lookup);
924 if (S_ISDIR(inode->i_mode))
927 ocfs2_set_links_count(fe, inode->i_nlink);
928 ocfs2_journal_dirty(handle, fe_bh);
930 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
931 if (S_ISDIR(inode->i_mode))
934 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
937 if (S_ISDIR(inode->i_mode))
943 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
944 orphan_name, &orphan_insert, orphan_dir);
951 ocfs2_commit_trans(osb, handle);
954 ocfs2_inode_unlock(inode, 1);
956 ocfs2_inode_unlock(dir, 1);
959 /* This was locked for us in ocfs2_prepare_orphan_dir() */
960 ocfs2_inode_unlock(orphan_dir, 1);
961 mutex_unlock(&orphan_dir->i_mutex);
966 brelse(parent_node_bh);
968 ocfs2_free_dir_lookup_result(&orphan_insert);
969 ocfs2_free_dir_lookup_result(&lookup);
971 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
978 * The only place this should be used is rename!
979 * if they have the same id, then the 1st one is the only one locked.
981 static int ocfs2_double_lock(struct ocfs2_super *osb,
982 struct buffer_head **bh1,
983 struct inode *inode1,
984 struct buffer_head **bh2,
985 struct inode *inode2)
988 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
989 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
990 struct buffer_head **tmpbh;
991 struct inode *tmpinode;
993 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
994 (unsigned long long)oi2->ip_blkno);
1001 /* we always want to lock the one with the lower lockid first. */
1002 if (oi1->ip_blkno != oi2->ip_blkno) {
1003 if (oi1->ip_blkno < oi2->ip_blkno) {
1004 /* switch id1 and id2 around */
1014 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
1017 if (status != -ENOENT)
1024 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
1027 * An error return must mean that no cluster locks
1028 * were held on function exit.
1030 if (oi1->ip_blkno != oi2->ip_blkno) {
1031 ocfs2_inode_unlock(inode2, 1);
1036 if (status != -ENOENT)
1040 trace_ocfs2_double_lock_end(
1041 (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1042 (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1050 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1052 ocfs2_inode_unlock(inode1, 1);
1054 if (inode1 != inode2)
1055 ocfs2_inode_unlock(inode2, 1);
1058 static int ocfs2_rename(struct inode *old_dir,
1059 struct dentry *old_dentry,
1060 struct inode *new_dir,
1061 struct dentry *new_dentry)
1063 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1064 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
1065 struct inode *old_inode = old_dentry->d_inode;
1066 struct inode *new_inode = new_dentry->d_inode;
1067 struct inode *orphan_dir = NULL;
1068 struct ocfs2_dinode *newfe = NULL;
1069 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1070 struct buffer_head *newfe_bh = NULL;
1071 struct buffer_head *old_inode_bh = NULL;
1072 struct ocfs2_super *osb = NULL;
1073 u64 newfe_blkno, old_de_ino;
1074 handle_t *handle = NULL;
1075 struct buffer_head *old_dir_bh = NULL;
1076 struct buffer_head *new_dir_bh = NULL;
1077 u32 old_dir_nlink = old_dir->i_nlink;
1078 struct ocfs2_dinode *old_di;
1079 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1080 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1081 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1082 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1083 struct ocfs2_dir_lookup_result target_insert = { NULL, };
1085 /* At some point it might be nice to break this function up a
1088 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1089 old_dentry->d_name.len, old_dentry->d_name.name,
1090 new_dentry->d_name.len, new_dentry->d_name.name);
1092 dquot_initialize(old_dir);
1093 dquot_initialize(new_dir);
1095 osb = OCFS2_SB(old_dir->i_sb);
1098 if (!igrab(new_inode))
1102 /* Assume a directory hierarchy thusly:
1105 * a,b,c, and d are all directories.
1107 * from cwd of 'a' on both nodes:
1111 * And that's why, just like the VFS, we need a file system
1113 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
1114 status = ocfs2_rename_lock(osb);
1122 /* if old and new are the same, this'll just do one lock. */
1123 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1124 &new_dir_bh, new_dir);
1131 /* make sure both dirs have bhs
1132 * get an extra ref on old_dir_bh if old==new */
1135 new_dir_bh = old_dir_bh;
1138 mlog(ML_ERROR, "no old_dir_bh!\n");
1145 * Aside from allowing a meta data update, the locking here
1146 * also ensures that the downconvert thread on other nodes
1147 * won't have to concurrently downconvert the inode and the
1150 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1153 if (status != -ENOENT)
1157 old_child_locked = 1;
1159 status = ocfs2_remote_dentry_delete(old_dentry);
1165 if (S_ISDIR(old_inode->i_mode)) {
1166 u64 old_inode_parent;
1169 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
1171 &old_inode_dot_dot_res);
1177 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1182 if (!new_inode && new_dir != old_dir &&
1183 new_dir->i_nlink >= ocfs2_link_max(osb)) {
1189 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1190 old_dentry->d_name.len,
1198 * Check for inode number is _not_ due to possible IO errors.
1199 * We might rmdir the source, keep it as pwd of some process
1200 * and merrily kill the link to whatever was created under the
1201 * same name. Goodbye sticky bit ;-<
1203 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1208 /* check if the target already exists (in which case we need
1210 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1211 new_dentry->d_name.len,
1212 &newfe_blkno, new_dir,
1213 &target_lookup_res);
1214 /* The only error we allow here is -ENOENT because the new
1215 * file not existing is perfectly valid. */
1216 if ((status < 0) && (status != -ENOENT)) {
1217 /* If we cannot find the file specified we should just */
1218 /* return the error... */
1225 if (!target_exists && new_inode) {
1227 * Target was unlinked by another node while we were
1228 * waiting to get to ocfs2_rename(). There isn't
1229 * anything we can do here to help the situation, so
1230 * bubble up the appropriate error.
1236 /* In case we need to overwrite an existing file, we blow it
1238 if (target_exists) {
1239 /* VFS didn't think there existed an inode here, but
1240 * someone else in the cluster must have raced our
1241 * rename to create one. Today we error cleanly, in
1242 * the future we should consider calling iget to build
1243 * a new struct inode for this entry. */
1247 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1248 new_dentry->d_name.name);
1252 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1255 trace_ocfs2_rename_disagree(
1256 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1257 (unsigned long long)newfe_blkno,
1258 OCFS2_I(new_inode)->ip_flags);
1262 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
1264 if (status != -ENOENT)
1268 new_child_locked = 1;
1270 status = ocfs2_remote_dentry_delete(new_dentry);
1276 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1278 trace_ocfs2_rename_over_existing(
1279 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1280 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1282 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1283 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1284 OCFS2_I(new_inode)->ip_blkno,
1285 orphan_name, &orphan_insert);
1292 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1294 status = ocfs2_check_dir_for_entry(new_dir,
1295 new_dentry->d_name.name,
1296 new_dentry->d_name.len);
1300 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1301 new_dentry->d_name.name,
1302 new_dentry->d_name.len,
1310 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
1311 if (IS_ERR(handle)) {
1312 status = PTR_ERR(handle);
1318 if (target_exists) {
1319 if (S_ISDIR(new_inode->i_mode)) {
1320 if (new_inode->i_nlink != 2 ||
1321 !ocfs2_empty_dir(new_inode)) {
1322 status = -ENOTEMPTY;
1326 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1328 OCFS2_JOURNAL_ACCESS_WRITE);
1334 if (S_ISDIR(new_inode->i_mode) ||
1335 (ocfs2_read_links_count(newfe) == 1)) {
1336 status = ocfs2_orphan_add(osb, handle, new_inode,
1337 newfe_bh, orphan_name,
1338 &orphan_insert, orphan_dir);
1345 /* change the dirent to point to the correct inode */
1346 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1352 new_dir->i_version++;
1354 if (S_ISDIR(new_inode->i_mode))
1355 ocfs2_set_links_count(newfe, 0);
1357 ocfs2_add_links_count(newfe, -1);
1358 ocfs2_journal_dirty(handle, newfe_bh);
1360 /* if the name was not found in new_dir, add it now */
1361 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1362 OCFS2_I(old_inode)->ip_blkno,
1363 new_dir_bh, &target_insert);
1366 old_inode->i_ctime = CURRENT_TIME;
1367 mark_inode_dirty(old_inode);
1369 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1371 OCFS2_JOURNAL_ACCESS_WRITE);
1373 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1375 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1376 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
1377 ocfs2_journal_dirty(handle, old_inode_bh);
1382 * Now that the name has been added to new_dir, remove the old name.
1384 * We don't keep any directory entry context around until now
1385 * because the insert might have changed the type of directory
1386 * we're dealing with.
1388 status = ocfs2_find_entry(old_dentry->d_name.name,
1389 old_dentry->d_name.len, old_dir,
1394 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
1401 drop_nlink(new_inode);
1402 new_inode->i_ctime = CURRENT_TIME;
1404 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1406 if (update_dot_dot) {
1407 status = ocfs2_update_entry(old_inode, handle,
1408 &old_inode_dot_dot_res, new_dir);
1409 drop_nlink(old_dir);
1411 drop_nlink(new_inode);
1414 mark_inode_dirty(new_dir);
1417 mark_inode_dirty(old_dir);
1418 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1420 mark_inode_dirty(new_inode);
1421 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1424 if (old_dir != new_dir) {
1425 /* Keep the same times on both directories.*/
1426 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1429 * This will also pick up the i_nlink change from the
1432 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1435 if (old_dir_nlink != old_dir->i_nlink) {
1437 mlog(ML_ERROR, "need to change nlink for old dir "
1438 "%llu from %d to %d but bh is NULL!\n",
1439 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1440 (int)old_dir_nlink, old_dir->i_nlink);
1442 struct ocfs2_dinode *fe;
1443 status = ocfs2_journal_access_di(handle,
1444 INODE_CACHE(old_dir),
1446 OCFS2_JOURNAL_ACCESS_WRITE);
1447 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1448 ocfs2_set_links_count(fe, old_dir->i_nlink);
1449 ocfs2_journal_dirty(handle, old_dir_bh);
1452 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1456 ocfs2_rename_unlock(osb);
1459 ocfs2_commit_trans(osb, handle);
1462 ocfs2_double_unlock(old_dir, new_dir);
1464 if (old_child_locked)
1465 ocfs2_inode_unlock(old_inode, 1);
1467 if (new_child_locked)
1468 ocfs2_inode_unlock(new_inode, 1);
1471 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1472 ocfs2_inode_unlock(orphan_dir, 1);
1473 mutex_unlock(&orphan_dir->i_mutex);
1478 sync_mapping_buffers(old_inode->i_mapping);
1483 ocfs2_free_dir_lookup_result(&target_lookup_res);
1484 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1485 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1486 ocfs2_free_dir_lookup_result(&orphan_insert);
1487 ocfs2_free_dir_lookup_result(&target_insert);
1490 brelse(old_inode_bh);
1501 * we expect i_size = strlen(symname). Copy symname into the file
1502 * data, including the null terminator.
1504 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1506 struct inode *inode,
1507 const char *symname)
1509 struct buffer_head **bhs = NULL;
1511 struct super_block *sb = osb->sb;
1512 u64 p_blkno, p_blocks;
1513 int virtual, blocks, status, i, bytes_left;
1515 bytes_left = i_size_read(inode) + 1;
1516 /* we can't trust i_blocks because we're actually going to
1517 * write i_size + 1 bytes. */
1518 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1520 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1521 i_size_read(inode), blocks);
1523 /* Sanity check -- make sure we're going to fit. */
1525 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1531 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1538 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1545 /* links can never be larger than one cluster so we know this
1546 * is all going to be contiguous, but do a sanity check
1548 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1555 while(bytes_left > 0) {
1556 c = &symname[virtual * sb->s_blocksize];
1558 bhs[virtual] = sb_getblk(sb, p_blkno);
1559 if (!bhs[virtual]) {
1564 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1567 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1569 OCFS2_JOURNAL_ACCESS_CREATE);
1575 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1577 memcpy(bhs[virtual]->b_data, c,
1578 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1581 ocfs2_journal_dirty(handle, bhs[virtual]);
1585 bytes_left -= sb->s_blocksize;
1592 for(i = 0; i < blocks; i++)
1602 static int ocfs2_symlink(struct inode *dir,
1603 struct dentry *dentry,
1604 const char *symname)
1606 int status, l, credits;
1608 struct ocfs2_super *osb = NULL;
1609 struct inode *inode = NULL;
1610 struct super_block *sb;
1611 struct buffer_head *new_fe_bh = NULL;
1612 struct buffer_head *parent_fe_bh = NULL;
1613 struct ocfs2_dinode *fe = NULL;
1614 struct ocfs2_dinode *dirfe;
1615 handle_t *handle = NULL;
1616 struct ocfs2_alloc_context *inode_ac = NULL;
1617 struct ocfs2_alloc_context *data_ac = NULL;
1618 struct ocfs2_alloc_context *xattr_ac = NULL;
1619 int want_clusters = 0;
1620 int xattr_credits = 0;
1621 struct ocfs2_security_xattr_info si = {
1624 int did_quota = 0, did_quota_inode = 0;
1625 struct ocfs2_dir_lookup_result lookup = { NULL, };
1627 int did_block_signals = 0;
1629 trace_ocfs2_symlink_begin(dir, dentry, symname,
1630 dentry->d_name.len, dentry->d_name.name);
1632 dquot_initialize(dir);
1637 l = strlen(symname) + 1;
1639 credits = ocfs2_calc_symlink_credits(sb);
1641 /* lock the parent directory */
1642 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
1644 if (status != -ENOENT)
1649 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1650 if (!ocfs2_read_links_count(dirfe)) {
1651 /* can't make a file in a deleted directory. */
1656 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1657 dentry->d_name.len);
1661 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1662 dentry->d_name.name,
1663 dentry->d_name.len, &lookup);
1669 status = ocfs2_reserve_new_inode(osb, &inode_ac);
1671 if (status != -ENOSPC)
1676 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1683 /* get security xattr */
1684 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
1686 if (status == -EOPNOTSUPP)
1694 /* calculate meta data/clusters for setting security xattr */
1696 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1697 &xattr_credits, &xattr_ac);
1704 /* don't reserve bitmap space for fast symlinks. */
1705 if (l > ocfs2_fast_symlink_chars(sb))
1708 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1710 if (status != -ENOSPC)
1715 handle = ocfs2_start_trans(osb, credits + xattr_credits);
1716 if (IS_ERR(handle)) {
1717 status = PTR_ERR(handle);
1723 /* Starting to change things, restart is no longer possible. */
1724 ocfs2_block_signals(&oldset);
1725 did_block_signals = 1;
1727 status = dquot_alloc_inode(inode);
1730 did_quota_inode = 1;
1732 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1733 dentry->d_name.name,
1734 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1737 status = ocfs2_mknod_locked(osb, dir, inode,
1738 0, &new_fe_bh, parent_fe_bh, handle,
1745 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1748 inode->i_op = &ocfs2_symlink_inode_operations;
1749 if (l > ocfs2_fast_symlink_chars(sb)) {
1752 status = dquot_alloc_space_nodirty(inode,
1753 ocfs2_clusters_to_bytes(osb->sb, 1));
1757 inode->i_mapping->a_ops = &ocfs2_aops;
1758 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1760 handle, data_ac, NULL,
1763 if (status != -ENOSPC && status != -EINTR) {
1765 "Failed to extend file to %llu\n",
1766 (unsigned long long)newsize);
1772 i_size_write(inode, newsize);
1773 inode->i_blocks = ocfs2_inode_sector_count(inode);
1775 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
1776 memcpy((char *) fe->id2.i_symlink, symname, l);
1777 i_size_write(inode, newsize);
1778 inode->i_blocks = 0;
1781 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1787 if (!ocfs2_inode_is_fast_symlink(inode)) {
1788 status = ocfs2_create_symlink_data(osb, handle, inode,
1797 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1806 * Do this before adding the entry to the directory. We add
1807 * also set d_op after success so that ->d_iput() will cleanup
1808 * the dentry lock even if ocfs2_add_entry() fails below.
1810 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1816 status = ocfs2_add_entry(handle, dentry, inode,
1817 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1824 insert_inode_hash(inode);
1825 d_instantiate(dentry, inode);
1827 if (status < 0 && did_quota)
1828 dquot_free_space_nodirty(inode,
1829 ocfs2_clusters_to_bytes(osb->sb, 1));
1830 if (status < 0 && did_quota_inode)
1831 dquot_free_inode(inode);
1833 ocfs2_commit_trans(osb, handle);
1835 ocfs2_inode_unlock(dir, 1);
1836 if (did_block_signals)
1837 ocfs2_unblock_signals(&oldset);
1840 brelse(parent_fe_bh);
1843 ocfs2_free_dir_lookup_result(&lookup);
1845 ocfs2_free_alloc_context(inode_ac);
1847 ocfs2_free_alloc_context(data_ac);
1849 ocfs2_free_alloc_context(xattr_ac);
1850 if ((status < 0) && inode) {
1851 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
1862 static int ocfs2_blkno_stringify(u64 blkno, char *name)
1864 int status, namelen;
1866 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1876 if (namelen != OCFS2_ORPHAN_NAMELEN) {
1882 trace_ocfs2_blkno_stringify(blkno, name, namelen);
1891 static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
1892 struct inode **ret_orphan_dir,
1893 struct buffer_head **ret_orphan_dir_bh)
1895 struct inode *orphan_dir_inode;
1896 struct buffer_head *orphan_dir_bh = NULL;
1899 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1900 ORPHAN_DIR_SYSTEM_INODE,
1902 if (!orphan_dir_inode) {
1908 mutex_lock(&orphan_dir_inode->i_mutex);
1910 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1912 mutex_unlock(&orphan_dir_inode->i_mutex);
1913 iput(orphan_dir_inode);
1919 *ret_orphan_dir = orphan_dir_inode;
1920 *ret_orphan_dir_bh = orphan_dir_bh;
1925 static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
1926 struct buffer_head *orphan_dir_bh,
1929 struct ocfs2_dir_lookup_result *lookup)
1932 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
1934 ret = ocfs2_blkno_stringify(blkno, name);
1940 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1941 orphan_dir_bh, name,
1942 OCFS2_ORPHAN_NAMELEN, lookup);
1952 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
1953 * insertion of an orphan.
1954 * @osb: ocfs2 file system
1955 * @ret_orphan_dir: Orphan dir inode - returned locked!
1956 * @blkno: Actual block number of the inode to be inserted into orphan dir.
1957 * @lookup: dir lookup result, to be passed back into functions like
1960 * Returns zero on success and the ret_orphan_dir, name and lookup
1961 * fields will be populated.
1963 * Returns non-zero on failure.
1965 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
1966 struct inode **ret_orphan_dir,
1969 struct ocfs2_dir_lookup_result *lookup)
1971 struct inode *orphan_dir_inode = NULL;
1972 struct buffer_head *orphan_dir_bh = NULL;
1975 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
1982 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
1983 blkno, name, lookup);
1989 *ret_orphan_dir = orphan_dir_inode;
1992 brelse(orphan_dir_bh);
1995 ocfs2_inode_unlock(orphan_dir_inode, 1);
1996 mutex_unlock(&orphan_dir_inode->i_mutex);
1997 iput(orphan_dir_inode);
2005 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2007 struct inode *inode,
2008 struct buffer_head *fe_bh,
2010 struct ocfs2_dir_lookup_result *lookup,
2011 struct inode *orphan_dir_inode)
2013 struct buffer_head *orphan_dir_bh = NULL;
2015 struct ocfs2_dinode *orphan_fe;
2016 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
2018 trace_ocfs2_orphan_add_begin(
2019 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2021 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
2027 status = ocfs2_journal_access_di(handle,
2028 INODE_CACHE(orphan_dir_inode),
2030 OCFS2_JOURNAL_ACCESS_WRITE);
2037 * We're going to journal the change of i_flags and i_orphaned_slot.
2038 * It's safe anyway, though some callers may duplicate the journaling.
2039 * Journaling within the func just make the logic look more
2042 status = ocfs2_journal_access_di(handle,
2045 OCFS2_JOURNAL_ACCESS_WRITE);
2051 /* we're a cluster, and nlink can change on disk from
2052 * underneath us... */
2053 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2054 if (S_ISDIR(inode->i_mode))
2055 ocfs2_add_links_count(orphan_fe, 1);
2056 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2057 ocfs2_journal_dirty(handle, orphan_dir_bh);
2059 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2060 OCFS2_ORPHAN_NAMELEN, inode,
2061 OCFS2_I(inode)->ip_blkno,
2062 orphan_dir_bh, lookup);
2068 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2069 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
2071 /* Record which orphan dir our inode now resides
2072 * in. delete_inode will use this to determine which orphan
2074 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2076 ocfs2_journal_dirty(handle, fe_bh);
2078 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2083 if (S_ISDIR(inode->i_mode))
2084 ocfs2_add_links_count(orphan_fe, -1);
2085 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2089 brelse(orphan_dir_bh);
2094 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2095 int ocfs2_orphan_del(struct ocfs2_super *osb,
2097 struct inode *orphan_dir_inode,
2098 struct inode *inode,
2099 struct buffer_head *orphan_dir_bh)
2101 char name[OCFS2_ORPHAN_NAMELEN + 1];
2102 struct ocfs2_dinode *orphan_fe;
2104 struct ocfs2_dir_lookup_result lookup = { NULL, };
2106 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2112 trace_ocfs2_orphan_del(
2113 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2114 name, OCFS2_ORPHAN_NAMELEN);
2116 /* find it's spot in the orphan directory */
2117 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2124 /* remove it from the orphan directory */
2125 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
2131 status = ocfs2_journal_access_di(handle,
2132 INODE_CACHE(orphan_dir_inode),
2134 OCFS2_JOURNAL_ACCESS_WRITE);
2140 /* do the i_nlink dance! :) */
2141 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2142 if (S_ISDIR(inode->i_mode))
2143 ocfs2_add_links_count(orphan_fe, -1);
2144 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2145 ocfs2_journal_dirty(handle, orphan_dir_bh);
2148 ocfs2_free_dir_lookup_result(&lookup);
2156 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
2157 * allocated file. This is different from the typical 'add to orphan dir'
2158 * operation in that the inode does not yet exist. This is a problem because
2159 * the orphan dir stringifies the inode block number to come up with it's
2160 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2161 * problem. This function works around it by calling deeper into the orphan
2162 * and suballoc code than other callers. Use this only by necessity.
2163 * @dir: The directory which this inode will ultimately wind up under - not the
2165 * @dir_bh: buffer_head the @dir inode block
2166 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2167 * with the string to be used for orphan dirent. Pass back to the orphan dir
2169 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2171 * @ret_di_blkno: block number where the new inode will be allocated.
2172 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2173 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2175 * Returns zero on success and the ret_orphan_dir, name and lookup
2176 * fields will be populated.
2178 * Returns non-zero on failure.
2180 static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2181 struct buffer_head *dir_bh,
2183 struct inode **ret_orphan_dir,
2185 struct ocfs2_dir_lookup_result *orphan_insert,
2186 struct ocfs2_alloc_context **ret_inode_ac)
2190 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2191 struct inode *orphan_dir = NULL;
2192 struct buffer_head *orphan_dir_bh = NULL;
2193 struct ocfs2_alloc_context *inode_ac = NULL;
2195 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2201 /* reserve an inode spot */
2202 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2209 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2216 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2217 di_blkno, orphan_name, orphan_insert);
2225 *ret_orphan_dir = orphan_dir;
2226 *ret_di_blkno = di_blkno;
2227 *ret_inode_ac = inode_ac;
2229 * orphan_name and orphan_insert are already up to
2230 * date via prepare_orphan_dir
2233 /* Unroll reserve_new_inode* */
2235 ocfs2_free_alloc_context(inode_ac);
2237 /* Unroll orphan dir locking */
2238 mutex_unlock(&orphan_dir->i_mutex);
2239 ocfs2_inode_unlock(orphan_dir, 1);
2243 brelse(orphan_dir_bh);
2248 int ocfs2_create_inode_in_orphan(struct inode *dir,
2250 struct inode **new_inode)
2252 int status, did_quota_inode = 0;
2253 struct inode *inode = NULL;
2254 struct inode *orphan_dir = NULL;
2255 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2256 struct ocfs2_dinode *di = NULL;
2257 handle_t *handle = NULL;
2258 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2259 struct buffer_head *parent_di_bh = NULL;
2260 struct buffer_head *new_di_bh = NULL;
2261 struct ocfs2_alloc_context *inode_ac = NULL;
2262 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2263 u64 uninitialized_var(di_blkno), suballoc_loc;
2266 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2268 if (status != -ENOENT)
2273 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2274 orphan_name, &orphan_dir,
2275 &di_blkno, &orphan_insert, &inode_ac);
2277 if (status != -ENOSPC)
2282 inode = ocfs2_get_init_inode(dir, mode);
2289 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2290 if (IS_ERR(handle)) {
2291 status = PTR_ERR(handle);
2297 status = dquot_alloc_inode(inode);
2300 did_quota_inode = 1;
2302 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2304 &suballoc_bit, di_blkno);
2311 /* do the real work now. */
2312 status = __ocfs2_mknod_locked(dir, inode,
2313 0, &new_di_bh, parent_di_bh, handle,
2314 inode_ac, di_blkno, suballoc_loc,
2321 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2322 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
2323 &orphan_insert, orphan_dir);
2329 /* get open lock so that only nodes can't remove it from orphan dir. */
2330 status = ocfs2_open_lock(inode);
2334 insert_inode_hash(inode);
2336 if (status < 0 && did_quota_inode)
2337 dquot_free_inode(inode);
2339 ocfs2_commit_trans(osb, handle);
2342 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2343 ocfs2_inode_unlock(orphan_dir, 1);
2344 mutex_unlock(&orphan_dir->i_mutex);
2348 if ((status < 0) && inode) {
2354 ocfs2_free_alloc_context(inode_ac);
2361 ocfs2_free_dir_lookup_result(&orphan_insert);
2363 ocfs2_inode_unlock(dir, 1);
2364 brelse(parent_di_bh);
2368 int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2369 struct inode *inode,
2370 struct dentry *dentry)
2373 struct buffer_head *parent_di_bh = NULL;
2374 handle_t *handle = NULL;
2375 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2376 struct ocfs2_dinode *dir_di, *di;
2377 struct inode *orphan_dir_inode = NULL;
2378 struct buffer_head *orphan_dir_bh = NULL;
2379 struct buffer_head *di_bh = NULL;
2380 struct ocfs2_dir_lookup_result lookup = { NULL, };
2382 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2383 dentry->d_name.len, dentry->d_name.name,
2384 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2385 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2387 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2389 if (status != -ENOENT)
2394 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2395 if (!dir_di->i_links_count) {
2396 /* can't make a file in a deleted directory. */
2401 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2402 dentry->d_name.len);
2406 /* get a spot inside the dir. */
2407 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2408 dentry->d_name.name,
2409 dentry->d_name.len, &lookup);
2415 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2416 ORPHAN_DIR_SYSTEM_INODE,
2418 if (!orphan_dir_inode) {
2424 mutex_lock(&orphan_dir_inode->i_mutex);
2426 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2429 mutex_unlock(&orphan_dir_inode->i_mutex);
2430 iput(orphan_dir_inode);
2434 status = ocfs2_read_inode_block(inode, &di_bh);
2440 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2441 if (IS_ERR(handle)) {
2442 status = PTR_ERR(handle);
2448 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2449 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2455 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2462 di = (struct ocfs2_dinode *)di_bh->b_data;
2463 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
2464 di->i_orphaned_slot = 0;
2465 set_nlink(inode, 1);
2466 ocfs2_set_links_count(di, inode->i_nlink);
2467 ocfs2_journal_dirty(handle, di_bh);
2469 status = ocfs2_add_entry(handle, dentry, inode,
2470 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2477 status = ocfs2_dentry_attach_lock(dentry, inode,
2478 OCFS2_I(dir)->ip_blkno);
2484 d_instantiate(dentry, inode);
2487 ocfs2_commit_trans(osb, handle);
2489 ocfs2_inode_unlock(orphan_dir_inode, 1);
2490 mutex_unlock(&orphan_dir_inode->i_mutex);
2491 iput(orphan_dir_inode);
2494 ocfs2_inode_unlock(dir, 1);
2497 brelse(parent_di_bh);
2498 brelse(orphan_dir_bh);
2500 ocfs2_free_dir_lookup_result(&lookup);
2508 const struct inode_operations ocfs2_dir_iops = {
2509 .create = ocfs2_create,
2510 .lookup = ocfs2_lookup,
2512 .unlink = ocfs2_unlink,
2513 .rmdir = ocfs2_unlink,
2514 .symlink = ocfs2_symlink,
2515 .mkdir = ocfs2_mkdir,
2516 .mknod = ocfs2_mknod,
2517 .rename = ocfs2_rename,
2518 .setattr = ocfs2_setattr,
2519 .getattr = ocfs2_getattr,
2520 .permission = ocfs2_permission,
2521 .setxattr = generic_setxattr,
2522 .getxattr = generic_getxattr,
2523 .listxattr = ocfs2_listxattr,
2524 .removexattr = generic_removexattr,
2525 .fiemap = ocfs2_fiemap,
2526 .get_acl = ocfs2_iop_get_acl,
2527 .set_acl = ocfs2_iop_set_acl,