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>
44 #define MLOG_MASK_PREFIX ML_NAMEI
45 #include <cluster/masklog.h>
53 #include "extent_map.h"
65 #include "buffer_head_io.h"
67 #define NAMEI_RA_CHUNKS 2
68 #define NAMEI_RA_BLOCKS 4
69 #define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
70 #define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b))
72 static int inline ocfs2_search_dirblock(struct buffer_head *bh,
74 const char *name, int namelen,
76 struct ocfs2_dir_entry **res_dir);
78 static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle,
80 struct ocfs2_dir_entry *de_del,
81 struct buffer_head *bh);
83 static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle,
85 const char *name, int namelen,
86 struct inode *inode, u64 blkno,
87 struct buffer_head *parent_fe_bh,
88 struct buffer_head *insert_bh);
90 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
92 struct dentry *dentry, int mode,
94 struct buffer_head **new_fe_bh,
95 struct buffer_head *parent_fe_bh,
96 struct ocfs2_journal_handle *handle,
97 struct inode **ret_inode,
98 struct ocfs2_alloc_context *inode_ac);
100 static int ocfs2_fill_new_dir(struct ocfs2_super *osb,
101 struct ocfs2_journal_handle *handle,
102 struct inode *parent,
104 struct buffer_head *fe_bh,
105 struct ocfs2_alloc_context *data_ac);
107 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
108 struct inode **ret_orphan_dir,
111 struct buffer_head **de_bh);
113 static int ocfs2_orphan_add(struct ocfs2_super *osb,
114 struct ocfs2_journal_handle *handle,
116 struct ocfs2_dinode *fe,
118 struct buffer_head *de_bh,
119 struct inode *orphan_dir_inode);
121 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
122 struct ocfs2_journal_handle *handle,
124 const char *symname);
126 static inline int ocfs2_add_entry(struct ocfs2_journal_handle *handle,
127 struct dentry *dentry,
128 struct inode *inode, u64 blkno,
129 struct buffer_head *parent_fe_bh,
130 struct buffer_head *insert_bh)
132 return __ocfs2_add_entry(handle, dentry->d_parent->d_inode,
133 dentry->d_name.name, dentry->d_name.len,
134 inode, blkno, parent_fe_bh, insert_bh);
137 /* An orphan dir name is an 8 byte value, printed as a hex string */
138 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
140 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
141 struct nameidata *nd)
145 struct buffer_head *dirent_bh = NULL;
146 struct inode *inode = NULL;
148 struct ocfs2_dir_entry *dirent;
149 struct ocfs2_inode_info *oi;
151 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
152 dentry->d_name.len, dentry->d_name.name);
154 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
155 ret = ERR_PTR(-ENAMETOOLONG);
159 mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len,
160 dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno);
162 status = ocfs2_meta_lock(dir, NULL, NULL, 0);
164 if (status != -ENOENT)
166 ret = ERR_PTR(status);
170 status = ocfs2_find_files_on_disk(dentry->d_name.name,
171 dentry->d_name.len, &blkno,
172 dir, &dirent_bh, &dirent);
176 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0);
178 mlog(ML_ERROR, "Unable to create inode %llu\n",
179 (unsigned long long)blkno);
180 ret = ERR_PTR(-EACCES);
185 /* Clear any orphaned state... If we were able to look up the
186 * inode from a directory, it certainly can't be orphaned. We
187 * might have the bad state from a node which intended to
188 * orphan this inode but crashed before it could commit the
190 spin_lock(&oi->ip_lock);
191 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
192 oi->ip_orphaned_slot = OCFS2_INVALID_SLOT;
193 spin_unlock(&oi->ip_lock);
196 dentry->d_op = &ocfs2_dentry_ops;
197 ret = d_splice_alias(inode, dentry);
201 * If d_splice_alias() finds a DCACHE_DISCONNECTED
202 * dentry, it will d_move() it on top of ourse. The
203 * return value will indicate this however, so in
204 * those cases, we switch them around for the locking
207 * NOTE: This dentry already has ->d_op set from
208 * ocfs2_get_parent() and ocfs2_get_dentry()
213 status = ocfs2_dentry_attach_lock(dentry, inode,
214 OCFS2_I(dir)->ip_blkno);
217 ret = ERR_PTR(status);
223 /* Don't drop the cluster lock until *after* the d_add --
224 * unlink on another node will message us to remove that
225 * dentry under this lock so otherwise we can race this with
226 * the vote thread and have a stale dentry. */
227 ocfs2_meta_unlock(dir, 0);
238 static int ocfs2_fill_new_dir(struct ocfs2_super *osb,
239 struct ocfs2_journal_handle *handle,
240 struct inode *parent,
242 struct buffer_head *fe_bh,
243 struct ocfs2_alloc_context *data_ac)
246 struct buffer_head *new_bh = NULL;
247 struct ocfs2_dir_entry *de = NULL;
251 status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh,
252 data_ac, NULL, &new_bh);
258 ocfs2_set_new_buffer_uptodate(inode, new_bh);
260 status = ocfs2_journal_access(handle, inode, new_bh,
261 OCFS2_JOURNAL_ACCESS_CREATE);
266 memset(new_bh->b_data, 0, osb->sb->s_blocksize);
268 de = (struct ocfs2_dir_entry *) new_bh->b_data;
269 de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno);
272 cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
273 strcpy(de->name, ".");
274 ocfs2_set_de_type(de, S_IFDIR);
275 de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len));
276 de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno);
277 de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize -
278 OCFS2_DIR_REC_LEN(1));
280 strcpy(de->name, "..");
281 ocfs2_set_de_type(de, S_IFDIR);
283 status = ocfs2_journal_dirty(handle, new_bh);
289 i_size_write(inode, inode->i_sb->s_blocksize);
291 inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize);
292 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
307 static int ocfs2_mknod(struct inode *dir,
308 struct dentry *dentry,
313 struct buffer_head *parent_fe_bh = NULL;
314 struct ocfs2_journal_handle *handle = NULL;
315 struct ocfs2_super *osb;
316 struct ocfs2_dinode *dirfe;
317 struct buffer_head *new_fe_bh = NULL;
318 struct buffer_head *de_bh = NULL;
319 struct inode *inode = NULL;
320 struct ocfs2_alloc_context *inode_ac = NULL;
321 struct ocfs2_alloc_context *data_ac = NULL;
323 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
324 (unsigned long)dev, dentry->d_name.len,
325 dentry->d_name.name);
327 /* get our super block */
328 osb = OCFS2_SB(dir->i_sb);
330 status = ocfs2_meta_lock(dir, NULL, &parent_fe_bh, 1);
332 if (status != -ENOENT)
337 handle = ocfs2_alloc_handle(osb);
338 if (handle == NULL) {
344 if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) {
349 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
350 if (!dirfe->i_links_count) {
351 /* can't make a file in a deleted directory. */
356 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
361 /* get a spot inside the dir. */
362 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
364 dentry->d_name.len, &de_bh);
370 /* reserve an inode spot */
371 status = ocfs2_reserve_new_inode(osb, handle, &inode_ac);
373 if (status != -ENOSPC)
378 /* are we making a directory? If so, reserve a cluster for his
381 status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac);
383 if (status != -ENOSPC)
389 handle = ocfs2_start_trans(osb, handle, OCFS2_MKNOD_CREDITS);
390 if (IS_ERR(handle)) {
391 status = PTR_ERR(handle);
397 /* do the real work now. */
398 status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev,
399 &new_fe_bh, parent_fe_bh, handle,
407 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
414 status = ocfs2_journal_access(handle, dir, parent_fe_bh,
415 OCFS2_JOURNAL_ACCESS_WRITE);
420 le16_add_cpu(&dirfe->i_links_count, 1);
421 status = ocfs2_journal_dirty(handle, parent_fe_bh);
429 status = ocfs2_add_entry(handle, dentry, inode,
430 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
437 status = ocfs2_dentry_attach_lock(dentry, inode,
438 OCFS2_I(dir)->ip_blkno);
444 insert_inode_hash(inode);
445 dentry->d_op = &ocfs2_dentry_ops;
446 d_instantiate(dentry, inode);
450 ocfs2_commit_trans(handle);
452 ocfs2_meta_unlock(dir, 1);
454 if (status == -ENOSPC)
455 mlog(0, "Disk is full\n");
464 brelse(parent_fe_bh);
466 if ((status < 0) && inode)
470 ocfs2_free_alloc_context(inode_ac);
473 ocfs2_free_alloc_context(data_ac);
480 static int ocfs2_mknod_locked(struct ocfs2_super *osb,
482 struct dentry *dentry, int mode,
484 struct buffer_head **new_fe_bh,
485 struct buffer_head *parent_fe_bh,
486 struct ocfs2_journal_handle *handle,
487 struct inode **ret_inode,
488 struct ocfs2_alloc_context *inode_ac)
491 struct ocfs2_dinode *fe = NULL;
492 struct ocfs2_extent_list *fel;
495 struct inode *inode = NULL;
497 mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
498 (unsigned long)dev, dentry->d_name.len,
499 dentry->d_name.name);
504 status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit,
511 inode = new_inode(dir->i_sb);
513 status = PTR_ERR(inode);
514 mlog(ML_ERROR, "new_inode failed!\n");
518 /* populate as many fields early on as possible - many of
519 * these are used by the support functions here and in
521 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
522 OCFS2_I(inode)->ip_blkno = fe_blkno;
527 inode->i_mode = mode;
528 spin_lock(&osb->osb_lock);
529 inode->i_generation = osb->s_next_generation++;
530 spin_unlock(&osb->osb_lock);
532 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
538 ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh);
540 status = ocfs2_journal_access(handle, inode, *new_fe_bh,
541 OCFS2_JOURNAL_ACCESS_CREATE);
547 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
548 memset(fe, 0, osb->sb->s_blocksize);
550 fe->i_generation = cpu_to_le32(inode->i_generation);
551 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
552 fe->i_blkno = cpu_to_le64(fe_blkno);
553 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
554 fe->i_suballoc_slot = cpu_to_le16(osb->slot_num);
555 fe->i_uid = cpu_to_le32(current->fsuid);
556 if (dir->i_mode & S_ISGID) {
557 fe->i_gid = cpu_to_le32(dir->i_gid);
561 fe->i_gid = cpu_to_le32(current->fsgid);
562 fe->i_mode = cpu_to_le16(mode);
563 if (S_ISCHR(mode) || S_ISBLK(mode))
564 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
566 fe->i_links_count = cpu_to_le16(inode->i_nlink);
568 fe->i_last_eb_blk = 0;
569 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
570 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
571 fe->i_atime = fe->i_ctime = fe->i_mtime =
572 cpu_to_le64(CURRENT_TIME.tv_sec);
573 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
574 cpu_to_le32(CURRENT_TIME.tv_nsec);
577 fel = &fe->id2.i_list;
578 fel->l_tree_depth = 0;
579 fel->l_next_free_rec = 0;
580 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
582 status = ocfs2_journal_dirty(handle, *new_fe_bh);
588 if (ocfs2_populate_inode(inode, fe, 1) < 0) {
589 mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, "
590 "i_blkno=%llu, i_ino=%lu\n",
591 (unsigned long long) (*new_fe_bh)->b_blocknr,
592 (unsigned long long)fe->i_blkno, inode->i_ino);
596 ocfs2_inode_set_new(osb, inode);
597 status = ocfs2_create_new_inode_locks(inode);
601 status = 0; /* error in ocfs2_create_new_inode_locks is not
619 static int ocfs2_mkdir(struct inode *dir,
620 struct dentry *dentry,
625 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
626 dentry->d_name.len, dentry->d_name.name);
627 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
633 static int ocfs2_create(struct inode *dir,
634 struct dentry *dentry,
636 struct nameidata *nd)
640 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
641 dentry->d_name.len, dentry->d_name.name);
642 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
648 static int ocfs2_link(struct dentry *old_dentry,
650 struct dentry *dentry)
652 struct ocfs2_journal_handle *handle;
653 struct inode *inode = old_dentry->d_inode;
655 struct buffer_head *fe_bh = NULL;
656 struct buffer_head *parent_fe_bh = NULL;
657 struct buffer_head *de_bh = NULL;
658 struct ocfs2_dinode *fe = NULL;
659 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
661 mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
662 old_dentry->d_name.len, old_dentry->d_name.name,
663 dentry->d_name.len, dentry->d_name.name);
665 if (S_ISDIR(inode->i_mode))
668 err = ocfs2_meta_lock(dir, NULL, &parent_fe_bh, 1);
680 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
685 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
687 dentry->d_name.len, &de_bh);
693 err = ocfs2_meta_lock(inode, NULL, &fe_bh, 1);
700 fe = (struct ocfs2_dinode *) fe_bh->b_data;
701 if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) {
703 goto out_unlock_inode;
706 handle = ocfs2_start_trans(osb, NULL, OCFS2_LINK_CREDITS);
707 if (IS_ERR(handle)) {
708 err = PTR_ERR(handle);
711 goto out_unlock_inode;
714 err = ocfs2_journal_access(handle, inode, fe_bh,
715 OCFS2_JOURNAL_ACCESS_WRITE);
722 inode->i_ctime = CURRENT_TIME;
723 fe->i_links_count = cpu_to_le16(inode->i_nlink);
724 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
725 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
727 err = ocfs2_journal_dirty(handle, fe_bh);
729 le16_add_cpu(&fe->i_links_count, -1);
735 err = ocfs2_add_entry(handle, dentry, inode,
736 OCFS2_I(inode)->ip_blkno,
737 parent_fe_bh, de_bh);
739 le16_add_cpu(&fe->i_links_count, -1);
745 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
751 atomic_inc(&inode->i_count);
752 dentry->d_op = &ocfs2_dentry_ops;
753 d_instantiate(dentry, inode);
756 ocfs2_commit_trans(handle);
758 ocfs2_meta_unlock(inode, 1);
761 ocfs2_meta_unlock(dir, 1);
768 brelse(parent_fe_bh);
776 * Takes and drops an exclusive lock on the given dentry. This will
777 * force other nodes to drop it.
779 static int ocfs2_remote_dentry_delete(struct dentry *dentry)
783 ret = ocfs2_dentry_lock(dentry, 1);
787 ocfs2_dentry_unlock(dentry, 1);
792 static inline int inode_is_unlinkable(struct inode *inode)
794 if (S_ISDIR(inode->i_mode)) {
795 if (inode->i_nlink == 2)
800 if (inode->i_nlink == 1)
805 static int ocfs2_unlink(struct inode *dir,
806 struct dentry *dentry)
809 int child_locked = 0;
810 struct inode *inode = dentry->d_inode;
811 struct inode *orphan_dir = NULL;
812 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
814 struct ocfs2_dinode *fe = NULL;
815 struct buffer_head *fe_bh = NULL;
816 struct buffer_head *parent_node_bh = NULL;
817 struct ocfs2_journal_handle *handle = NULL;
818 struct ocfs2_dir_entry *dirent = NULL;
819 struct buffer_head *dirent_bh = NULL;
820 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
821 struct buffer_head *orphan_entry_bh = NULL;
823 mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
824 dentry->d_name.len, dentry->d_name.name);
826 BUG_ON(dentry->d_parent->d_inode != dir);
828 mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno);
830 if (inode == osb->root_inode) {
831 mlog(0, "Cannot delete the root directory\n");
835 status = ocfs2_meta_lock(dir, NULL, &parent_node_bh, 1);
837 if (status != -ENOENT)
842 status = ocfs2_find_files_on_disk(dentry->d_name.name,
843 dentry->d_name.len, &blkno,
844 dir, &dirent_bh, &dirent);
846 if (status != -ENOENT)
851 if (OCFS2_I(inode)->ip_blkno != blkno) {
854 mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n",
855 (unsigned long long)OCFS2_I(inode)->ip_blkno,
856 (unsigned long long)blkno, OCFS2_I(inode)->ip_flags);
860 status = ocfs2_meta_lock(inode, NULL, &fe_bh, 1);
862 if (status != -ENOENT)
868 if (S_ISDIR(inode->i_mode)) {
869 if (!ocfs2_empty_dir(inode)) {
872 } else if (inode->i_nlink != 2) {
878 status = ocfs2_remote_dentry_delete(dentry);
880 /* This vote should succeed under all normal
886 if (inode_is_unlinkable(inode)) {
887 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, inode,
896 handle = ocfs2_start_trans(osb, NULL, OCFS2_UNLINK_CREDITS);
897 if (IS_ERR(handle)) {
898 status = PTR_ERR(handle);
904 status = ocfs2_journal_access(handle, inode, fe_bh,
905 OCFS2_JOURNAL_ACCESS_WRITE);
911 fe = (struct ocfs2_dinode *) fe_bh->b_data;
913 if (inode_is_unlinkable(inode)) {
914 status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
915 orphan_entry_bh, orphan_dir);
922 /* delete the name from the parent dir */
923 status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh);
929 if (S_ISDIR(inode->i_mode))
932 fe->i_links_count = cpu_to_le16(inode->i_nlink);
934 status = ocfs2_journal_dirty(handle, fe_bh);
940 if (S_ISDIR(inode->i_mode)) {
942 status = ocfs2_mark_inode_dirty(handle, dir,
952 ocfs2_commit_trans(handle);
955 ocfs2_meta_unlock(inode, 1);
957 ocfs2_meta_unlock(dir, 1);
960 /* This was locked for us in ocfs2_prepare_orphan_dir() */
961 ocfs2_meta_unlock(orphan_dir, 1);
962 mutex_unlock(&orphan_dir->i_mutex);
973 brelse(parent_node_bh);
976 brelse(orphan_entry_bh);
984 * The only place this should be used is rename!
985 * if they have the same id, then the 1st one is the only one locked.
987 static int ocfs2_double_lock(struct ocfs2_super *osb,
988 struct buffer_head **bh1,
989 struct inode *inode1,
990 struct buffer_head **bh2,
991 struct inode *inode2)
994 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
995 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
996 struct buffer_head **tmpbh;
997 struct inode *tmpinode;
999 mlog_entry("(inode1 = %llu, inode2 = %llu)\n",
1000 (unsigned long long)oi1->ip_blkno,
1001 (unsigned long long)oi2->ip_blkno);
1008 /* we always want to lock the one with the lower lockid first. */
1009 if (oi1->ip_blkno != oi2->ip_blkno) {
1010 if (oi1->ip_blkno < oi2->ip_blkno) {
1011 /* switch id1 and id2 around */
1012 mlog(0, "switching them around...\n");
1022 status = ocfs2_meta_lock(inode2, NULL, bh2, 1);
1024 if (status != -ENOENT)
1031 status = ocfs2_meta_lock(inode1, NULL, bh1, 1);
1034 * An error return must mean that no cluster locks
1035 * were held on function exit.
1037 if (oi1->ip_blkno != oi2->ip_blkno)
1038 ocfs2_meta_unlock(inode2, 1);
1040 if (status != -ENOENT)
1049 static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1051 ocfs2_meta_unlock(inode1, 1);
1053 if (inode1 != inode2)
1054 ocfs2_meta_unlock(inode2, 1);
1057 #define PARENT_INO(buffer) \
1058 ((struct ocfs2_dir_entry *) \
1060 le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode
1062 static int ocfs2_rename(struct inode *old_dir,
1063 struct dentry *old_dentry,
1064 struct inode *new_dir,
1065 struct dentry *new_dentry)
1067 int status = 0, rename_lock = 0, parents_locked = 0;
1068 int old_child_locked = 0, new_child_locked = 0;
1069 struct inode *old_inode = old_dentry->d_inode;
1070 struct inode *new_inode = new_dentry->d_inode;
1071 struct inode *orphan_dir = NULL;
1072 struct ocfs2_dinode *newfe = NULL;
1073 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
1074 struct buffer_head *orphan_entry_bh = NULL;
1075 struct buffer_head *newfe_bh = NULL;
1076 struct buffer_head *insert_entry_bh = NULL;
1077 struct ocfs2_super *osb = NULL;
1079 struct ocfs2_journal_handle *handle = NULL;
1080 struct buffer_head *old_dir_bh = NULL;
1081 struct buffer_head *new_dir_bh = NULL;
1082 struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry
1084 struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above
1085 struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir,
1086 // this is the 1st dirent bh
1087 nlink_t old_dir_nlink = old_dir->i_nlink, new_dir_nlink = new_dir->i_nlink;
1089 /* At some point it might be nice to break this function up a
1092 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
1093 old_dir, old_dentry, new_dir, new_dentry,
1094 old_dentry->d_name.len, old_dentry->d_name.name,
1095 new_dentry->d_name.len, new_dentry->d_name.name);
1097 osb = OCFS2_SB(old_dir->i_sb);
1100 if (!igrab(new_inode))
1104 /* Assume a directory heirarchy thusly:
1107 * a,b,c, and d are all directories.
1109 * from cwd of 'a' on both nodes:
1113 * And that's why, just like the VFS, we need a file system
1115 if (old_dentry != new_dentry) {
1116 status = ocfs2_rename_lock(osb);
1124 handle = ocfs2_alloc_handle(osb);
1125 if (handle == NULL) {
1131 /* if old and new are the same, this'll just do one lock. */
1132 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1133 &new_dir_bh, new_dir);
1140 /* make sure both dirs have bhs
1141 * get an extra ref on old_dir_bh if old==new */
1144 new_dir_bh = old_dir_bh;
1147 mlog(ML_ERROR, "no old_dir_bh!\n");
1154 * Though we don't require an inode meta data update if
1155 * old_inode is not a directory, we lock anyway here to ensure
1156 * the vote thread on other nodes won't have to concurrently
1157 * downconvert the inode and the dentry locks.
1159 status = ocfs2_meta_lock(old_inode, NULL, NULL, 1);
1161 if (status != -ENOENT)
1165 old_child_locked = 1;
1167 status = ocfs2_remote_dentry_delete(old_dentry);
1173 if (S_ISDIR(old_inode->i_mode)) {
1175 old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0);
1176 if (!old_inode_de_bh)
1180 if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) !=
1181 OCFS2_I(old_dir)->ip_blkno)
1184 if (!new_inode && new_dir!=old_dir &&
1185 new_dir->i_nlink >= OCFS2_LINK_MAX)
1190 old_de_bh = ocfs2_find_entry(old_dentry->d_name.name,
1191 old_dentry->d_name.len,
1197 * Check for inode number is _not_ due to possible IO errors.
1198 * We might rmdir the source, keep it as pwd of some process
1199 * and merrily kill the link to whatever was created under the
1200 * same name. Goodbye sticky bit ;-<
1202 if (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno)
1205 /* check if the target already exists (in which case we need
1207 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1208 new_dentry->d_name.len,
1209 &newfe_blkno, new_dir, &new_de_bh,
1211 /* The only error we allow here is -ENOENT because the new
1212 * file not existing is perfectly valid. */
1213 if ((status < 0) && (status != -ENOENT)) {
1214 /* If we cannot find the file specified we should just */
1215 /* return the error... */
1220 if (!new_de && new_inode)
1221 mlog(ML_ERROR, "inode %lu does not exist in it's parent "
1222 "directory!", new_inode->i_ino);
1224 /* In case we need to overwrite an existing file, we blow it
1227 /* VFS didn't think there existed an inode here, but
1228 * someone else in the cluster must have raced our
1229 * rename to create one. Today we error cleanly, in
1230 * the future we should consider calling iget to build
1231 * a new struct inode for this entry. */
1235 mlog(0, "We found an inode for name %.*s but VFS "
1236 "didn't give us one.\n", new_dentry->d_name.len,
1237 new_dentry->d_name.name);
1241 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1244 mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n",
1245 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1246 (unsigned long long)newfe_blkno,
1247 OCFS2_I(new_inode)->ip_flags);
1251 status = ocfs2_meta_lock(new_inode, NULL, &newfe_bh, 1);
1253 if (status != -ENOENT)
1257 new_child_locked = 1;
1259 status = ocfs2_remote_dentry_delete(new_dentry);
1265 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1267 mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu "
1268 "newfebh=%p bhblocknr=%llu\n", new_de,
1269 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
1270 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1272 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
1273 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
1283 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1285 status = ocfs2_check_dir_for_entry(new_dir,
1286 new_dentry->d_name.name,
1287 new_dentry->d_name.len);
1291 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1292 new_dentry->d_name.name,
1293 new_dentry->d_name.len,
1301 handle = ocfs2_start_trans(osb, handle, OCFS2_RENAME_CREDITS);
1302 if (IS_ERR(handle)) {
1303 status = PTR_ERR(handle);
1310 if (S_ISDIR(new_inode->i_mode)) {
1311 if (!ocfs2_empty_dir(new_inode) ||
1312 new_inode->i_nlink != 2) {
1313 status = -ENOTEMPTY;
1317 status = ocfs2_journal_access(handle, new_inode, newfe_bh,
1318 OCFS2_JOURNAL_ACCESS_WRITE);
1324 if (S_ISDIR(new_inode->i_mode) ||
1325 (newfe->i_links_count == cpu_to_le16(1))){
1326 status = ocfs2_orphan_add(osb, handle, new_inode,
1328 orphan_entry_bh, orphan_dir);
1335 /* change the dirent to point to the correct inode */
1336 status = ocfs2_journal_access(handle, new_dir, new_de_bh,
1337 OCFS2_JOURNAL_ACCESS_WRITE);
1342 new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno);
1343 new_de->file_type = old_de->file_type;
1344 new_dir->i_version++;
1345 status = ocfs2_journal_dirty(handle, new_de_bh);
1351 if (S_ISDIR(new_inode->i_mode))
1352 newfe->i_links_count = 0;
1354 le16_add_cpu(&newfe->i_links_count, -1);
1356 status = ocfs2_journal_dirty(handle, newfe_bh);
1362 /* if the name was not found in new_dir, add it now */
1363 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1364 OCFS2_I(old_inode)->ip_blkno,
1365 new_dir_bh, insert_entry_bh);
1368 old_inode->i_ctime = CURRENT_TIME;
1369 mark_inode_dirty(old_inode);
1371 /* now that the name has been added to new_dir, remove the old name */
1372 status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh);
1379 new_inode->i_nlink--;
1380 new_inode->i_ctime = CURRENT_TIME;
1382 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1383 if (old_inode_de_bh) {
1384 status = ocfs2_journal_access(handle, old_inode,
1386 OCFS2_JOURNAL_ACCESS_WRITE);
1387 PARENT_INO(old_inode_de_bh->b_data) =
1388 cpu_to_le64(OCFS2_I(new_dir)->ip_blkno);
1389 status = ocfs2_journal_dirty(handle, old_inode_de_bh);
1392 new_inode->i_nlink--;
1395 mark_inode_dirty(new_dir);
1398 mark_inode_dirty(old_dir);
1400 mark_inode_dirty(new_inode);
1402 if (old_dir != new_dir)
1403 if (new_dir_nlink != new_dir->i_nlink) {
1405 mlog(ML_ERROR, "need to change nlink for new "
1406 "dir %llu from %d to %d but bh is NULL\n",
1407 (unsigned long long)OCFS2_I(new_dir)->ip_blkno,
1408 (int)new_dir_nlink, new_dir->i_nlink);
1410 struct ocfs2_dinode *fe;
1411 status = ocfs2_journal_access(handle,
1414 OCFS2_JOURNAL_ACCESS_WRITE);
1415 fe = (struct ocfs2_dinode *) new_dir_bh->b_data;
1416 fe->i_links_count = cpu_to_le16(new_dir->i_nlink);
1417 status = ocfs2_journal_dirty(handle, new_dir_bh);
1421 if (old_dir_nlink != old_dir->i_nlink) {
1423 mlog(ML_ERROR, "need to change nlink for old dir "
1424 "%llu from %d to %d but bh is NULL!\n",
1425 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1426 (int)old_dir_nlink, old_dir->i_nlink);
1428 struct ocfs2_dinode *fe;
1429 status = ocfs2_journal_access(handle, old_dir,
1431 OCFS2_JOURNAL_ACCESS_WRITE);
1432 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
1433 fe->i_links_count = cpu_to_le16(old_dir->i_nlink);
1434 status = ocfs2_journal_dirty(handle, old_dir_bh);
1438 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
1442 ocfs2_rename_unlock(osb);
1445 ocfs2_commit_trans(handle);
1448 ocfs2_double_unlock(old_dir, new_dir);
1450 if (old_child_locked)
1451 ocfs2_meta_unlock(old_inode, 1);
1453 if (new_child_locked)
1454 ocfs2_meta_unlock(new_inode, 1);
1457 /* This was locked for us in ocfs2_prepare_orphan_dir() */
1458 ocfs2_meta_unlock(orphan_dir, 1);
1459 mutex_unlock(&orphan_dir->i_mutex);
1464 sync_mapping_buffers(old_inode->i_mapping);
1478 if (old_inode_de_bh)
1479 brelse(old_inode_de_bh);
1480 if (orphan_entry_bh)
1481 brelse(orphan_entry_bh);
1482 if (insert_entry_bh)
1483 brelse(insert_entry_bh);
1491 * we expect i_size = strlen(symname). Copy symname into the file
1492 * data, including the null terminator.
1494 static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
1495 struct ocfs2_journal_handle *handle,
1496 struct inode *inode,
1497 const char *symname)
1499 struct buffer_head **bhs = NULL;
1501 struct super_block *sb = osb->sb;
1504 int virtual, blocks, status, i, bytes_left;
1506 bytes_left = i_size_read(inode) + 1;
1507 /* we can't trust i_blocks because we're actually going to
1508 * write i_size + 1 bytes. */
1509 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1511 mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n",
1512 (unsigned long long)inode->i_blocks,
1513 i_size_read(inode), blocks);
1515 /* Sanity check -- make sure we're going to fit. */
1517 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1523 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1530 status = ocfs2_extent_map_get_blocks(inode, 0, 1, &p_blkno,
1537 /* links can never be larger than one cluster so we know this
1538 * is all going to be contiguous, but do a sanity check
1540 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1547 while(bytes_left > 0) {
1548 c = &symname[virtual * sb->s_blocksize];
1550 bhs[virtual] = sb_getblk(sb, p_blkno);
1551 if (!bhs[virtual]) {
1556 ocfs2_set_new_buffer_uptodate(inode, bhs[virtual]);
1558 status = ocfs2_journal_access(handle, inode, bhs[virtual],
1559 OCFS2_JOURNAL_ACCESS_CREATE);
1565 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1567 memcpy(bhs[virtual]->b_data, c,
1568 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1571 status = ocfs2_journal_dirty(handle, bhs[virtual]);
1579 bytes_left -= sb->s_blocksize;
1586 for(i = 0; i < blocks; i++)
1596 static int ocfs2_symlink(struct inode *dir,
1597 struct dentry *dentry,
1598 const char *symname)
1600 int status, l, credits;
1602 struct ocfs2_super *osb = NULL;
1603 struct inode *inode = NULL;
1604 struct super_block *sb;
1605 struct buffer_head *new_fe_bh = NULL;
1606 struct buffer_head *de_bh = NULL;
1607 struct buffer_head *parent_fe_bh = NULL;
1608 struct ocfs2_dinode *fe = NULL;
1609 struct ocfs2_dinode *dirfe;
1610 struct ocfs2_journal_handle *handle = NULL;
1611 struct ocfs2_alloc_context *inode_ac = NULL;
1612 struct ocfs2_alloc_context *data_ac = NULL;
1614 mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
1615 dentry, symname, dentry->d_name.len, dentry->d_name.name);
1620 l = strlen(symname) + 1;
1622 credits = ocfs2_calc_symlink_credits(sb);
1624 /* lock the parent directory */
1625 status = ocfs2_meta_lock(dir, NULL, &parent_fe_bh, 1);
1627 if (status != -ENOENT)
1632 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
1633 if (!dirfe->i_links_count) {
1634 /* can't make a file in a deleted directory. */
1639 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1640 dentry->d_name.len);
1644 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1645 dentry->d_name.name,
1646 dentry->d_name.len, &de_bh);
1652 handle = ocfs2_alloc_handle(osb);
1653 if (handle == NULL) {
1659 status = ocfs2_reserve_new_inode(osb, handle, &inode_ac);
1661 if (status != -ENOSPC)
1666 /* don't reserve bitmap space for fast symlinks. */
1667 if (l > ocfs2_fast_symlink_chars(sb)) {
1668 status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac);
1670 if (status != -ENOSPC)
1676 handle = ocfs2_start_trans(osb, handle, credits);
1677 if (IS_ERR(handle)) {
1678 status = PTR_ERR(handle);
1684 status = ocfs2_mknod_locked(osb, dir, dentry,
1685 S_IFLNK | S_IRWXUGO, 0,
1686 &new_fe_bh, parent_fe_bh, handle,
1693 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1696 if (l > ocfs2_fast_symlink_chars(sb)) {
1697 inode->i_op = &ocfs2_symlink_inode_operations;
1698 status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh,
1699 handle, data_ac, NULL,
1702 if (status != -ENOSPC && status != -EINTR) {
1704 "Failed to extend file to %llu\n",
1705 (unsigned long long)newsize);
1711 i_size_write(inode, newsize);
1712 inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize);
1714 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1715 memcpy((char *) fe->id2.i_symlink, symname, l);
1716 i_size_write(inode, newsize);
1717 inode->i_blocks = 0;
1720 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1726 if (!ocfs2_inode_is_fast_symlink(inode)) {
1727 status = ocfs2_create_symlink_data(osb, handle, inode,
1735 status = ocfs2_add_entry(handle, dentry, inode,
1736 le64_to_cpu(fe->i_blkno), parent_fe_bh,
1743 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1749 insert_inode_hash(inode);
1750 dentry->d_op = &ocfs2_dentry_ops;
1751 d_instantiate(dentry, inode);
1754 ocfs2_commit_trans(handle);
1756 ocfs2_meta_unlock(dir, 1);
1761 brelse(parent_fe_bh);
1765 ocfs2_free_alloc_context(inode_ac);
1767 ocfs2_free_alloc_context(data_ac);
1768 if ((status < 0) && inode)
1776 int ocfs2_check_dir_entry(struct inode * dir,
1777 struct ocfs2_dir_entry * de,
1778 struct buffer_head * bh,
1779 unsigned long offset)
1781 const char *error_msg = NULL;
1782 const int rlen = le16_to_cpu(de->rec_len);
1784 if (rlen < OCFS2_DIR_REC_LEN(1))
1785 error_msg = "rec_len is smaller than minimal";
1786 else if (rlen % 4 != 0)
1787 error_msg = "rec_len % 4 != 0";
1788 else if (rlen < OCFS2_DIR_REC_LEN(de->name_len))
1789 error_msg = "rec_len is too small for name_len";
1790 else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize)
1791 error_msg = "directory entry across blocks";
1793 if (error_msg != NULL)
1794 mlog(ML_ERROR, "bad entry in directory #%llu: %s - "
1795 "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n",
1796 (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg,
1797 offset, (unsigned long long)le64_to_cpu(de->inode), rlen,
1799 return error_msg == NULL ? 1 : 0;
1802 /* we don't always have a dentry for what we want to add, so people
1803 * like orphan dir can call this instead.
1805 * If you pass me insert_bh, I'll skip the search of the other dir
1806 * blocks and put the record in there.
1808 static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle,
1810 const char *name, int namelen,
1811 struct inode *inode, u64 blkno,
1812 struct buffer_head *parent_fe_bh,
1813 struct buffer_head *insert_bh)
1815 unsigned long offset;
1816 unsigned short rec_len;
1817 struct ocfs2_dir_entry *de, *de1;
1818 struct super_block *sb;
1828 rec_len = OCFS2_DIR_REC_LEN(namelen);
1830 de = (struct ocfs2_dir_entry *) insert_bh->b_data;
1832 BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data);
1833 /* These checks should've already been passed by the
1834 * prepare function, but I guess we can leave them
1836 if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) {
1840 if (ocfs2_match(namelen, name, de)) {
1844 if (((le64_to_cpu(de->inode) == 0) &&
1845 (le16_to_cpu(de->rec_len) >= rec_len)) ||
1846 (le16_to_cpu(de->rec_len) >=
1847 (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) {
1848 status = ocfs2_journal_access(handle, dir, insert_bh,
1849 OCFS2_JOURNAL_ACCESS_WRITE);
1850 /* By now the buffer is marked for journaling */
1851 offset += le16_to_cpu(de->rec_len);
1852 if (le64_to_cpu(de->inode)) {
1853 de1 = (struct ocfs2_dir_entry *)((char *) de +
1854 OCFS2_DIR_REC_LEN(de->name_len));
1856 cpu_to_le16(le16_to_cpu(de->rec_len) -
1857 OCFS2_DIR_REC_LEN(de->name_len));
1858 de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
1861 de->file_type = OCFS2_FT_UNKNOWN;
1863 de->inode = cpu_to_le64(blkno);
1864 ocfs2_set_de_type(de, inode->i_mode);
1867 de->name_len = namelen;
1868 memcpy(de->name, name, namelen);
1870 dir->i_mtime = dir->i_ctime = CURRENT_TIME;
1872 status = ocfs2_journal_dirty(handle, insert_bh);
1876 offset += le16_to_cpu(de->rec_len);
1877 de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len));
1880 /* when you think about it, the assert above should prevent us
1881 * from ever getting here. */
1891 * ocfs2_delete_entry deletes a directory entry by merging it with the
1894 static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle,
1896 struct ocfs2_dir_entry *de_del,
1897 struct buffer_head *bh)
1899 struct ocfs2_dir_entry *de, *pde;
1900 int i, status = -ENOENT;
1902 mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh);
1906 de = (struct ocfs2_dir_entry *) bh->b_data;
1907 while (i < bh->b_size) {
1908 if (!ocfs2_check_dir_entry(dir, de, bh, i)) {
1914 status = ocfs2_journal_access(handle, dir, bh,
1915 OCFS2_JOURNAL_ACCESS_WRITE);
1923 cpu_to_le16(le16_to_cpu(pde->rec_len) +
1924 le16_to_cpu(de->rec_len));
1928 status = ocfs2_journal_dirty(handle, bh);
1931 i += le16_to_cpu(de->rec_len);
1933 de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len));
1941 * Returns 0 if not found, -1 on failure, and 1 on success
1943 static int inline ocfs2_search_dirblock(struct buffer_head *bh,
1945 const char *name, int namelen,
1946 unsigned long offset,
1947 struct ocfs2_dir_entry **res_dir)
1949 struct ocfs2_dir_entry *de;
1950 char *dlimit, *de_buf;
1956 de_buf = bh->b_data;
1957 dlimit = de_buf + dir->i_sb->s_blocksize;
1959 while (de_buf < dlimit) {
1960 /* this code is executed quadratically often */
1961 /* do minimal checking `by hand' */
1963 de = (struct ocfs2_dir_entry *) de_buf;
1965 if (de_buf + namelen <= dlimit &&
1966 ocfs2_match(namelen, name, de)) {
1967 /* found a match - just to be sure, do a full check */
1968 if (!ocfs2_check_dir_entry(dir, de, bh, offset)) {
1977 /* prevent looping on a bad block */
1978 de_len = le16_to_cpu(de->rec_len);
1993 struct buffer_head *ocfs2_find_entry(const char *name, int namelen,
1995 struct ocfs2_dir_entry **res_dir)
1997 struct super_block *sb;
1998 struct buffer_head *bh_use[NAMEI_RA_SIZE];
1999 struct buffer_head *bh, *ret = NULL;
2000 unsigned long start, block, b;
2001 int ra_max = 0; /* Number of bh's in the readahead
2003 int ra_ptr = 0; /* Current index into readahead
2006 int nblocks, i, err;
2013 nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
2014 start = OCFS2_I(dir)->ip_dir_start_lookup;
2015 if (start >= nblocks)
2022 * We deal with the read-ahead logic here.
2024 if (ra_ptr >= ra_max) {
2025 /* Refill the readahead buffer */
2028 for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) {
2030 * Terminate if we reach the end of the
2031 * directory and must wrap, or if our
2032 * search has finished at this block.
2034 if (b >= nblocks || (num && block == start)) {
2035 bh_use[ra_max] = NULL;
2040 bh = ocfs2_bread(dir, b++, &err, 1);
2041 bh_use[ra_max] = bh;
2044 if ((bh = bh_use[ra_ptr++]) == NULL)
2047 if (!buffer_uptodate(bh)) {
2048 /* read error, skip block & hope for the best */
2049 ocfs2_error(dir->i_sb, "reading directory %llu, "
2051 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2056 i = ocfs2_search_dirblock(bh, dir, name, namelen,
2057 block << sb->s_blocksize_bits,
2060 OCFS2_I(dir)->ip_dir_start_lookup = block;
2062 goto cleanup_and_exit;
2066 goto cleanup_and_exit;
2069 if (++block >= nblocks)
2071 } while (block != start);
2074 * If the directory has grown while we were searching, then
2075 * search the last part of the directory before giving up.
2078 nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
2079 if (block < nblocks) {
2085 /* Clean up the read-ahead blocks */
2086 for (; ra_ptr < ra_max; ra_ptr++)
2087 brelse(bh_use[ra_ptr]);
2093 static int ocfs2_blkno_stringify(u64 blkno, char *name)
2095 int status, namelen;
2099 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2109 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2115 mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
2124 static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
2125 struct inode **ret_orphan_dir,
2126 struct inode *inode,
2128 struct buffer_head **de_bh)
2130 struct inode *orphan_dir_inode;
2131 struct buffer_head *orphan_dir_bh = NULL;
2134 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2140 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2141 ORPHAN_DIR_SYSTEM_INODE,
2143 if (!orphan_dir_inode) {
2149 mutex_lock(&orphan_dir_inode->i_mutex);
2151 status = ocfs2_meta_lock(orphan_dir_inode, NULL, &orphan_dir_bh, 1);
2157 status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2158 orphan_dir_bh, name,
2159 OCFS2_ORPHAN_NAMELEN, de_bh);
2161 ocfs2_meta_unlock(orphan_dir_inode, 1);
2167 *ret_orphan_dir = orphan_dir_inode;
2171 mutex_unlock(&orphan_dir_inode->i_mutex);
2172 iput(orphan_dir_inode);
2176 brelse(orphan_dir_bh);
2182 static int ocfs2_orphan_add(struct ocfs2_super *osb,
2183 struct ocfs2_journal_handle *handle,
2184 struct inode *inode,
2185 struct ocfs2_dinode *fe,
2187 struct buffer_head *de_bh,
2188 struct inode *orphan_dir_inode)
2190 struct buffer_head *orphan_dir_bh = NULL;
2192 struct ocfs2_dinode *orphan_fe;
2194 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
2196 status = ocfs2_read_block(osb,
2197 OCFS2_I(orphan_dir_inode)->ip_blkno,
2198 &orphan_dir_bh, OCFS2_BH_CACHED,
2205 status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh,
2206 OCFS2_JOURNAL_ACCESS_WRITE);
2212 /* we're a cluster, and nlink can change on disk from
2213 * underneath us... */
2214 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2215 if (S_ISDIR(inode->i_mode))
2216 le16_add_cpu(&orphan_fe->i_links_count, 1);
2217 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
2219 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2225 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2226 OCFS2_ORPHAN_NAMELEN, inode,
2227 OCFS2_I(inode)->ip_blkno,
2228 orphan_dir_bh, de_bh);
2234 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
2236 /* Record which orphan dir our inode now resides
2237 * in. delete_inode will use this to determine which orphan
2239 spin_lock(&OCFS2_I(inode)->ip_lock);
2240 OCFS2_I(inode)->ip_orphaned_slot = osb->slot_num;
2241 spin_unlock(&OCFS2_I(inode)->ip_lock);
2243 mlog(0, "Inode %llu orphaned in slot %d\n",
2244 (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num);
2248 brelse(orphan_dir_bh);
2254 /* unlike orphan_add, we expect the orphan dir to already be locked here. */
2255 int ocfs2_orphan_del(struct ocfs2_super *osb,
2256 struct ocfs2_journal_handle *handle,
2257 struct inode *orphan_dir_inode,
2258 struct inode *inode,
2259 struct buffer_head *orphan_dir_bh)
2261 char name[OCFS2_ORPHAN_NAMELEN + 1];
2262 struct ocfs2_dinode *orphan_fe;
2264 struct buffer_head *target_de_bh = NULL;
2265 struct ocfs2_dir_entry *target_de = NULL;
2269 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2275 mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n",
2276 name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2277 OCFS2_ORPHAN_NAMELEN);
2279 /* find it's spot in the orphan directory */
2280 target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN,
2281 orphan_dir_inode, &target_de);
2282 if (!target_de_bh) {
2288 /* remove it from the orphan directory */
2289 status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de,
2296 status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh,
2297 OCFS2_JOURNAL_ACCESS_WRITE);
2303 /* do the i_nlink dance! :) */
2304 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2305 if (S_ISDIR(inode->i_mode))
2306 le16_add_cpu(&orphan_fe->i_links_count, -1);
2307 orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
2309 status = ocfs2_journal_dirty(handle, orphan_dir_bh);
2317 brelse(target_de_bh);
2323 struct inode_operations ocfs2_dir_iops = {
2324 .create = ocfs2_create,
2325 .lookup = ocfs2_lookup,
2327 .unlink = ocfs2_unlink,
2328 .rmdir = ocfs2_unlink,
2329 .symlink = ocfs2_symlink,
2330 .mkdir = ocfs2_mkdir,
2331 .mknod = ocfs2_mknod,
2332 .rename = ocfs2_rename,
2333 .setattr = ocfs2_setattr,
2334 .getattr = ocfs2_getattr,