1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * vfs' aops, fops, dops and iops
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
27 #include <linux/types.h>
28 #include <linux/slab.h>
29 #include <linux/highmem.h>
30 #include <linux/pagemap.h>
32 #include <asm/byteorder.h>
34 #define MLOG_MASK_PREFIX ML_INODE
35 #include <cluster/masklog.h>
41 #include "extent_map.h"
43 #include "heartbeat.h"
53 #include "buffer_head_io.h"
55 struct ocfs2_find_inode_args
59 unsigned int fi_flags;
62 static int ocfs2_read_locked_inode(struct inode *inode,
63 struct ocfs2_find_inode_args *args);
64 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
65 static int ocfs2_find_actor(struct inode *inode, void *opaque);
66 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
68 struct buffer_head *fe_bh);
70 void ocfs2_set_inode_flags(struct inode *inode)
72 unsigned int flags = OCFS2_I(inode)->ip_attr;
74 inode->i_flags &= ~(S_IMMUTABLE |
75 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
77 if (flags & OCFS2_IMMUTABLE_FL)
78 inode->i_flags |= S_IMMUTABLE;
80 if (flags & OCFS2_SYNC_FL)
81 inode->i_flags |= S_SYNC;
82 if (flags & OCFS2_APPEND_FL)
83 inode->i_flags |= S_APPEND;
84 if (flags & OCFS2_NOATIME_FL)
85 inode->i_flags |= S_NOATIME;
86 if (flags & OCFS2_DIRSYNC_FL)
87 inode->i_flags |= S_DIRSYNC;
90 /* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
91 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
93 unsigned int flags = oi->vfs_inode.i_flags;
95 oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
96 OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
98 oi->ip_attr |= OCFS2_SYNC_FL;
100 oi->ip_attr |= OCFS2_APPEND_FL;
101 if (flags & S_IMMUTABLE)
102 oi->ip_attr |= OCFS2_IMMUTABLE_FL;
103 if (flags & S_NOATIME)
104 oi->ip_attr |= OCFS2_NOATIME_FL;
105 if (flags & S_DIRSYNC)
106 oi->ip_attr |= OCFS2_DIRSYNC_FL;
109 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, int flags)
111 struct inode *inode = NULL;
112 struct super_block *sb = osb->sb;
113 struct ocfs2_find_inode_args args;
115 mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno);
117 /* Ok. By now we've either got the offsets passed to us by the
118 * caller, or we just pulled them off the bh. Lets do some
119 * sanity checks to make sure they're OK. */
121 inode = ERR_PTR(-EINVAL);
122 mlog_errno(PTR_ERR(inode));
126 args.fi_blkno = blkno;
127 args.fi_flags = flags;
128 args.fi_ino = ino_from_blkno(sb, blkno);
130 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
131 ocfs2_init_locked_inode, &args);
132 /* inode was *not* in the inode cache. 2.6.x requires
133 * us to do our own read_inode call and unlock it
135 if (inode && inode->i_state & I_NEW) {
136 mlog(0, "Inode was not in inode cache, reading it.\n");
137 ocfs2_read_locked_inode(inode, &args);
138 unlock_new_inode(inode);
141 inode = ERR_PTR(-ENOMEM);
142 mlog_errno(PTR_ERR(inode));
145 if (is_bad_inode(inode)) {
147 inode = ERR_PTR(-ESTALE);
152 if (!IS_ERR(inode)) {
153 mlog(0, "returning inode with number %llu\n",
154 (unsigned long long)OCFS2_I(inode)->ip_blkno);
155 mlog_exit_ptr(inode);
163 * here's how inodes get read from disk:
164 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
165 * found? : return the in-memory inode
166 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
169 static int ocfs2_find_actor(struct inode *inode, void *opaque)
171 struct ocfs2_find_inode_args *args = NULL;
172 struct ocfs2_inode_info *oi = OCFS2_I(inode);
175 mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque);
179 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
181 if (oi->ip_blkno != args->fi_blkno)
191 * initialize the new inode, but don't do anything that would cause
193 * return 0 on success, 1 on failure
195 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
197 struct ocfs2_find_inode_args *args = opaque;
199 mlog_entry("inode = %p, opaque = %p\n", inode, opaque);
201 inode->i_ino = args->fi_ino;
202 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
208 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
211 struct super_block *sb;
212 struct ocfs2_super *osb;
213 int status = -EINVAL;
215 mlog_entry("(0x%p, size:%llu)\n", inode,
216 (unsigned long long)le64_to_cpu(fe->i_size));
221 /* this means that read_inode cannot create a superblock inode
222 * today. change if needed. */
223 if (!OCFS2_IS_VALID_DINODE(fe) ||
224 !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
225 mlog(0, "Invalid dinode: i_ino=%lu, i_blkno=%llu, "
226 "signature = %.*s, flags = 0x%x\n",
228 (unsigned long long)le64_to_cpu(fe->i_blkno), 7,
229 fe->i_signature, le32_to_cpu(fe->i_flags));
233 if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) {
234 mlog(ML_ERROR, "file entry generation does not match "
235 "superblock! osb->fs_generation=%x, "
236 "fe->i_fs_generation=%x\n",
237 osb->fs_generation, le32_to_cpu(fe->i_fs_generation));
241 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
242 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
243 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
245 inode->i_version = 1;
246 inode->i_generation = le32_to_cpu(fe->i_generation);
247 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
248 inode->i_mode = le16_to_cpu(fe->i_mode);
249 inode->i_uid = le32_to_cpu(fe->i_uid);
250 inode->i_gid = le32_to_cpu(fe->i_gid);
252 /* Fast symlinks will have i_size but no allocated clusters. */
253 if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
256 inode->i_blocks = ocfs2_inode_sector_count(inode);
257 inode->i_mapping->a_ops = &ocfs2_aops;
258 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
259 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
260 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
261 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
262 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
263 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
265 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
267 "ip_blkno %llu != i_blkno %llu!\n",
268 (unsigned long long)OCFS2_I(inode)->ip_blkno,
269 (unsigned long long)le64_to_cpu(fe->i_blkno));
271 inode->i_nlink = le16_to_cpu(fe->i_links_count);
273 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
274 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
276 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
277 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
278 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
279 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
280 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
281 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
282 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
283 /* we can't actually hit this as read_inode can't
284 * handle superblocks today ;-) */
288 switch (inode->i_mode & S_IFMT) {
290 inode->i_fop = &ocfs2_fops;
291 inode->i_op = &ocfs2_file_iops;
292 i_size_write(inode, le64_to_cpu(fe->i_size));
295 inode->i_op = &ocfs2_dir_iops;
296 inode->i_fop = &ocfs2_dops;
297 i_size_write(inode, le64_to_cpu(fe->i_size));
300 if (ocfs2_inode_is_fast_symlink(inode))
301 inode->i_op = &ocfs2_fast_symlink_inode_operations;
303 inode->i_op = &ocfs2_symlink_inode_operations;
304 i_size_write(inode, le64_to_cpu(fe->i_size));
307 inode->i_op = &ocfs2_special_file_iops;
308 init_special_inode(inode, inode->i_mode,
314 inode->i_ino = ino_from_blkno(inode->i_sb,
315 le64_to_cpu(fe->i_blkno));
318 * If we ever want to create system files from kernel,
319 * the generation argument to
320 * ocfs2_inode_lock_res_init() will have to change.
322 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
324 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
325 OCFS2_LOCK_TYPE_META, 0, inode);
327 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
328 OCFS2_LOCK_TYPE_OPEN, 0, inode);
331 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
332 OCFS2_LOCK_TYPE_RW, inode->i_generation,
335 ocfs2_set_inode_flags(inode);
343 static int ocfs2_read_locked_inode(struct inode *inode,
344 struct ocfs2_find_inode_args *args)
346 struct super_block *sb;
347 struct ocfs2_super *osb;
348 struct ocfs2_dinode *fe;
349 struct buffer_head *bh = NULL;
350 int status, can_lock;
353 mlog_entry("(0x%p, 0x%p)\n", inode, args);
356 if (inode == NULL || inode->i_sb == NULL) {
357 mlog(ML_ERROR, "bad inode\n");
364 mlog(ML_ERROR, "bad inode args\n");
365 make_bad_inode(inode);
370 * To improve performance of cold-cache inode stats, we take
371 * the cluster lock here if possible.
373 * Generally, OCFS2 never trusts the contents of an inode
374 * unless it's holding a cluster lock, so taking it here isn't
375 * a correctness issue as much as it is a performance
378 * There are three times when taking the lock is not a good idea:
380 * 1) During startup, before we have initialized the DLM.
382 * 2) If we are reading certain system files which never get
383 * cluster locks (local alloc, truncate log).
385 * 3) If the process doing the iget() is responsible for
386 * orphan dir recovery. We're holding the orphan dir lock and
387 * can get into a deadlock with another process on another
388 * node in ->delete_inode().
390 * #1 and #2 can be simply solved by never taking the lock
391 * here for system files (which are the only type we read
392 * during mount). It's a heavier approach, but our main
393 * concern is user-accesible files anyway.
395 * #3 works itself out because we'll eventually take the
396 * cluster lock before trusting anything anyway.
398 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
399 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
400 && !ocfs2_mount_local(osb);
403 * To maintain backwards compatibility with older versions of
404 * ocfs2-tools, we still store the generation value for system
405 * files. The only ones that actually matter to userspace are
406 * the journals, but it's easier and inexpensive to just flag
407 * all system files similarly.
409 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
410 generation = osb->fs_generation;
412 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
413 OCFS2_LOCK_TYPE_META,
416 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
417 OCFS2_LOCK_TYPE_OPEN,
421 status = ocfs2_open_lock(inode);
423 make_bad_inode(inode);
427 status = ocfs2_meta_lock(inode, NULL, 0);
429 make_bad_inode(inode);
435 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
436 status = ocfs2_try_open_lock(inode, 0);
438 make_bad_inode(inode);
443 status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0,
444 can_lock ? inode : NULL);
451 fe = (struct ocfs2_dinode *) bh->b_data;
452 if (!OCFS2_IS_VALID_DINODE(fe)) {
453 mlog(0, "Invalid dinode #%llu: signature = %.*s\n",
454 (unsigned long long)args->fi_blkno, 7,
460 * This is a code bug. Right now the caller needs to
461 * understand whether it is asking for a system file inode or
462 * not so the proper lock names can be built.
464 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
465 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
466 "Inode %llu: system file state is ambigous\n",
467 (unsigned long long)args->fi_blkno);
469 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
470 S_ISBLK(le16_to_cpu(fe->i_mode)))
471 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
473 if (ocfs2_populate_inode(inode, fe, 0) < 0)
476 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
482 ocfs2_meta_unlock(inode, 0);
485 make_bad_inode(inode);
494 void ocfs2_sync_blockdev(struct super_block *sb)
496 sync_blockdev(sb->s_bdev);
499 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
501 struct buffer_head *fe_bh)
504 struct ocfs2_truncate_context *tc = NULL;
505 struct ocfs2_dinode *fe;
506 handle_t *handle = NULL;
510 fe = (struct ocfs2_dinode *) fe_bh->b_data;
513 * This check will also skip truncate of inodes with inline
514 * data and fast symlinks.
516 if (fe->i_clusters) {
517 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
518 if (IS_ERR(handle)) {
519 status = PTR_ERR(handle);
524 status = ocfs2_journal_access(handle, inode, fe_bh,
525 OCFS2_JOURNAL_ACCESS_WRITE);
531 i_size_write(inode, 0);
533 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
539 ocfs2_commit_trans(osb, handle);
542 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
548 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
557 ocfs2_commit_trans(osb, handle);
562 static int ocfs2_remove_inode(struct inode *inode,
563 struct buffer_head *di_bh,
564 struct inode *orphan_dir_inode,
565 struct buffer_head *orphan_dir_bh)
568 struct inode *inode_alloc_inode = NULL;
569 struct buffer_head *inode_alloc_bh = NULL;
571 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
572 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
575 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
576 le16_to_cpu(di->i_suballoc_slot));
577 if (!inode_alloc_inode) {
583 mutex_lock(&inode_alloc_inode->i_mutex);
584 status = ocfs2_meta_lock(inode_alloc_inode, &inode_alloc_bh, 1);
586 mutex_unlock(&inode_alloc_inode->i_mutex);
592 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS);
593 if (IS_ERR(handle)) {
594 status = PTR_ERR(handle);
599 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
606 /* set the inodes dtime */
607 status = ocfs2_journal_access(handle, inode, di_bh,
608 OCFS2_JOURNAL_ACCESS_WRITE);
614 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
615 le32_and_cpu(&di->i_flags, ~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
617 status = ocfs2_journal_dirty(handle, di_bh);
623 ocfs2_remove_from_cache(inode, di_bh);
625 status = ocfs2_free_dinode(handle, inode_alloc_inode,
631 ocfs2_commit_trans(osb, handle);
633 ocfs2_meta_unlock(inode_alloc_inode, 1);
634 mutex_unlock(&inode_alloc_inode->i_mutex);
635 brelse(inode_alloc_bh);
637 iput(inode_alloc_inode);
643 * Serialize with orphan dir recovery. If the process doing
644 * recovery on this orphan dir does an iget() with the dir
645 * i_mutex held, we'll deadlock here. Instead we detect this
646 * and exit early - recovery will wipe this inode for us.
648 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
653 spin_lock(&osb->osb_lock);
654 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
655 mlog(0, "Recovery is happening on orphan dir %d, will skip "
656 "this inode\n", slot);
660 /* This signals to the orphan recovery process that it should
661 * wait for us to handle the wipe. */
662 osb->osb_orphan_wipes[slot]++;
664 spin_unlock(&osb->osb_lock);
668 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
671 spin_lock(&osb->osb_lock);
672 osb->osb_orphan_wipes[slot]--;
673 spin_unlock(&osb->osb_lock);
675 wake_up(&osb->osb_wipe_event);
678 static int ocfs2_wipe_inode(struct inode *inode,
679 struct buffer_head *di_bh)
681 int status, orphaned_slot;
682 struct inode *orphan_dir_inode = NULL;
683 struct buffer_head *orphan_dir_bh = NULL;
684 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
685 struct ocfs2_dinode *di;
687 di = (struct ocfs2_dinode *) di_bh->b_data;
688 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
690 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
694 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
695 ORPHAN_DIR_SYSTEM_INODE,
697 if (!orphan_dir_inode) {
703 /* Lock the orphan dir. The lock will be held for the entire
704 * delete_inode operation. We do this now to avoid races with
705 * recovery completion on other nodes. */
706 mutex_lock(&orphan_dir_inode->i_mutex);
707 status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1);
709 mutex_unlock(&orphan_dir_inode->i_mutex);
715 /* we do this while holding the orphan dir lock because we
716 * don't want recovery being run from another node to try an
717 * inode delete underneath us -- this will result in two nodes
718 * truncating the same file! */
719 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
722 goto bail_unlock_dir;
725 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
731 ocfs2_meta_unlock(orphan_dir_inode, 1);
732 mutex_unlock(&orphan_dir_inode->i_mutex);
733 brelse(orphan_dir_bh);
735 iput(orphan_dir_inode);
736 ocfs2_signal_wipe_completion(osb, orphaned_slot);
741 /* There is a series of simple checks that should be done before a
742 * trylock is even considered. Encapsulate those in this function. */
743 static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
746 struct ocfs2_inode_info *oi = OCFS2_I(inode);
747 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
749 /* We shouldn't be getting here for the root directory
751 if (inode == osb->root_inode) {
752 mlog(ML_ERROR, "Skipping delete of root inode.\n");
756 /* If we're coming from downconvert_thread we can't go into our own
757 * voting [hello, deadlock city!], so unforuntately we just
758 * have to skip deleting this guy. That's OK though because
759 * the node who's doing the actual deleting should handle it
761 if (current == osb->dc_task) {
762 mlog(0, "Skipping delete of %lu because we're currently "
763 "in downconvert\n", inode->i_ino);
767 spin_lock(&oi->ip_lock);
768 /* OCFS2 *never* deletes system files. This should technically
769 * never get here as system file inodes should always have a
770 * positive link count. */
771 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
772 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
773 (unsigned long long)oi->ip_blkno);
777 /* If we have allowd wipe of this inode for another node, it
778 * will be marked here so we can safely skip it. Recovery will
779 * cleanup any inodes we might inadvertantly skip here. */
780 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
781 mlog(0, "Skipping delete of %lu because another node "
782 "has done this for us.\n", inode->i_ino);
788 spin_unlock(&oi->ip_lock);
793 /* Query the cluster to determine whether we should wipe an inode from
796 * Requires the inode to have the cluster lock. */
797 static int ocfs2_query_inode_wipe(struct inode *inode,
798 struct buffer_head *di_bh,
802 struct ocfs2_inode_info *oi = OCFS2_I(inode);
803 struct ocfs2_dinode *di;
807 /* While we were waiting for the cluster lock in
808 * ocfs2_delete_inode, another node might have asked to delete
809 * the inode. Recheck our flags to catch this. */
810 if (!ocfs2_inode_is_valid_to_delete(inode)) {
811 mlog(0, "Skipping delete of %llu because flags changed\n",
812 (unsigned long long)oi->ip_blkno);
816 /* Now that we have an up to date inode, we can double check
818 if (inode->i_nlink) {
819 mlog(0, "Skipping delete of %llu because nlink = %u\n",
820 (unsigned long long)oi->ip_blkno, inode->i_nlink);
824 /* Do some basic inode verification... */
825 di = (struct ocfs2_dinode *) di_bh->b_data;
826 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
827 /* for lack of a better error? */
830 "Inode %llu (on-disk %llu) not orphaned! "
831 "Disk flags 0x%x, inode flags 0x%x\n",
832 (unsigned long long)oi->ip_blkno,
833 (unsigned long long)le64_to_cpu(di->i_blkno),
834 le32_to_cpu(di->i_flags), oi->ip_flags);
838 /* has someone already deleted us?! baaad... */
846 * This is how ocfs2 determines whether an inode is still live
847 * within the cluster. Every node takes a shared read lock on
848 * the inode open lock in ocfs2_read_locked_inode(). When we
849 * get to ->delete_inode(), each node tries to convert it's
850 * lock to an exclusive. Trylocks are serialized by the inode
851 * meta data lock. If the upconvert suceeds, we know the inode
852 * is no longer live and can be deleted.
854 * Though we call this with the meta data lock held, the
855 * trylock keeps us from ABBA deadlock.
857 status = ocfs2_try_open_lock(inode, 1);
858 if (status == -EAGAIN) {
860 mlog(0, "Skipping delete of %llu because it is in use on "
861 "other nodes\n", (unsigned long long)oi->ip_blkno);
870 mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n",
871 (unsigned long long)oi->ip_blkno,
872 le16_to_cpu(di->i_orphaned_slot));
878 /* Support function for ocfs2_delete_inode. Will help us keep the
879 * inode data in a consistent state for clear_inode. Always truncates
880 * pages, optionally sync's them first. */
881 static void ocfs2_cleanup_delete_inode(struct inode *inode,
884 mlog(0, "Cleanup inode %llu, sync = %d\n",
885 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
887 write_inode_now(inode, 1);
888 truncate_inode_pages(&inode->i_data, 0);
891 void ocfs2_delete_inode(struct inode *inode)
894 sigset_t blocked, oldset;
895 struct buffer_head *di_bh = NULL;
897 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
899 if (is_bad_inode(inode)) {
900 mlog(0, "Skipping delete of bad inode\n");
904 if (!ocfs2_inode_is_valid_to_delete(inode)) {
905 /* It's probably not necessary to truncate_inode_pages
906 * here but we do it for safety anyway (it will most
907 * likely be a no-op anyway) */
908 ocfs2_cleanup_delete_inode(inode, 0);
912 /* We want to block signals in delete_inode as the lock and
913 * messaging paths may return us -ERESTARTSYS. Which would
914 * cause us to exit early, resulting in inodes being orphaned
916 sigfillset(&blocked);
917 status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
920 ocfs2_cleanup_delete_inode(inode, 1);
924 /* Lock down the inode. This gives us an up to date view of
925 * it's metadata (for verification), and allows us to
926 * serialize delete_inode on multiple nodes.
928 * Even though we might be doing a truncate, we don't take the
929 * allocation lock here as it won't be needed - nobody will
930 * have the file open.
932 status = ocfs2_meta_lock(inode, &di_bh, 1);
934 if (status != -ENOENT)
936 ocfs2_cleanup_delete_inode(inode, 0);
940 /* Query the cluster. This will be the final decision made
941 * before we go ahead and wipe the inode. */
942 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
943 if (!wipe || status < 0) {
944 /* Error and remote inode busy both mean we won't be
945 * removing the inode, so they take almost the same
950 /* Someone in the cluster has disallowed a wipe of
951 * this inode, or it was never completely
952 * orphaned. Write out the pages and exit now. */
953 ocfs2_cleanup_delete_inode(inode, 1);
954 goto bail_unlock_inode;
957 ocfs2_cleanup_delete_inode(inode, 0);
959 status = ocfs2_wipe_inode(inode, di_bh);
961 if (status != -EDEADLK)
963 goto bail_unlock_inode;
967 * Mark the inode as successfully deleted.
969 * This is important for ocfs2_clear_inode() as it will check
970 * this flag and skip any checkpointing work
972 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
973 * the LVB for other nodes.
975 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
978 ocfs2_meta_unlock(inode, 1);
981 status = sigprocmask(SIG_SETMASK, &oldset, NULL);
989 void ocfs2_clear_inode(struct inode *inode)
992 struct ocfs2_inode_info *oi = OCFS2_I(inode);
999 mlog(0, "Clearing inode: %llu, nlink = %u\n",
1000 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink);
1002 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1003 "Inode=%lu\n", inode->i_ino);
1005 /* To preven remote deletes we hold open lock before, now it
1006 * is time to unlock PR and EX open locks. */
1007 ocfs2_open_unlock(inode);
1009 /* Do these before all the other work so that we don't bounce
1010 * the downconvert thread while waiting to destroy the locks. */
1011 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
1012 ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres);
1013 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
1015 /* We very well may get a clear_inode before all an inodes
1016 * metadata has hit disk. Of course, we can't drop any cluster
1017 * locks until the journal has finished with it. The only
1018 * exception here are successfully wiped inodes - their
1019 * metadata can now be considered to be part of the system
1020 * inodes from which it came. */
1021 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1022 ocfs2_checkpoint_inode(inode);
1024 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1025 "Clear inode of %llu, inode has io markers\n",
1026 (unsigned long long)oi->ip_blkno);
1028 ocfs2_extent_map_trunc(inode, 0);
1030 status = ocfs2_drop_inode_locks(inode);
1034 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1035 ocfs2_lock_res_free(&oi->ip_meta_lockres);
1036 ocfs2_lock_res_free(&oi->ip_open_lockres);
1038 ocfs2_metadata_cache_purge(inode);
1040 mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached,
1041 "Clear inode of %llu, inode has %u cache items\n",
1042 (unsigned long long)oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached);
1044 mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
1045 "Clear inode of %llu, inode has a bad flag\n",
1046 (unsigned long long)oi->ip_blkno);
1048 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1049 "Clear inode of %llu, inode is locked\n",
1050 (unsigned long long)oi->ip_blkno);
1052 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1053 "Clear inode of %llu, io_mutex is locked\n",
1054 (unsigned long long)oi->ip_blkno);
1055 mutex_unlock(&oi->ip_io_mutex);
1058 * down_trylock() returns 0, down_write_trylock() returns 1
1061 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1062 "Clear inode of %llu, alloc_sem is locked\n",
1063 (unsigned long long)oi->ip_blkno);
1064 up_write(&oi->ip_alloc_sem);
1066 mlog_bug_on_msg(oi->ip_open_count,
1067 "Clear inode of %llu has open count %d\n",
1068 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1070 /* Clear all other flags. */
1071 oi->ip_flags = OCFS2_INODE_CACHE_INLINE;
1072 oi->ip_created_trans = 0;
1073 oi->ip_last_trans = 0;
1074 oi->ip_dir_start_lookup = 0;
1075 oi->ip_blkno = 0ULL;
1081 /* Called under inode_lock, with no more references on the
1082 * struct inode, so it's safe here to check the flags field
1083 * and to manipulate i_nlink without any other locks. */
1084 void ocfs2_drop_inode(struct inode *inode)
1086 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1090 mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n",
1091 (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags);
1093 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1094 generic_delete_inode(inode);
1096 generic_drop_inode(inode);
1102 * TODO: this should probably be merged into ocfs2_get_block
1104 * However, you now need to pay attention to the cont_prepare_write()
1105 * stuff in ocfs2_get_block (that is, ocfs2_get_block pretty much
1106 * expects never to extend).
1108 struct buffer_head *ocfs2_bread(struct inode *inode,
1109 int block, int *err, int reada)
1111 struct buffer_head *bh = NULL;
1114 int readflags = OCFS2_BH_CACHED;
1117 readflags |= OCFS2_BH_READAHEAD;
1119 if (((u64)block << inode->i_sb->s_blocksize_bits) >=
1120 i_size_read(inode)) {
1125 down_read(&OCFS2_I(inode)->ip_alloc_sem);
1126 tmperr = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL,
1128 up_read(&OCFS2_I(inode)->ip_alloc_sem);
1134 tmperr = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, &bh,
1154 * This is called from our getattr.
1156 int ocfs2_inode_revalidate(struct dentry *dentry)
1158 struct inode *inode = dentry->d_inode;
1161 mlog_entry("(inode = 0x%p, ino = %llu)\n", inode,
1162 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL);
1165 mlog(0, "eep, no inode!\n");
1170 spin_lock(&OCFS2_I(inode)->ip_lock);
1171 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1172 spin_unlock(&OCFS2_I(inode)->ip_lock);
1173 mlog(0, "inode deleted!\n");
1177 spin_unlock(&OCFS2_I(inode)->ip_lock);
1179 /* Let ocfs2_meta_lock do the work of updating our struct
1181 status = ocfs2_meta_lock(inode, NULL, 0);
1183 if (status != -ENOENT)
1187 ocfs2_meta_unlock(inode, 0);
1195 * Updates a disk inode from a
1197 * Only takes ip_lock.
1199 int ocfs2_mark_inode_dirty(handle_t *handle,
1200 struct inode *inode,
1201 struct buffer_head *bh)
1204 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1206 mlog_entry("(inode %llu)\n",
1207 (unsigned long long)OCFS2_I(inode)->ip_blkno);
1209 status = ocfs2_journal_access(handle, inode, bh,
1210 OCFS2_JOURNAL_ACCESS_WRITE);
1216 spin_lock(&OCFS2_I(inode)->ip_lock);
1217 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1218 ocfs2_get_inode_flags(OCFS2_I(inode));
1219 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1220 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1221 spin_unlock(&OCFS2_I(inode)->ip_lock);
1223 fe->i_size = cpu_to_le64(i_size_read(inode));
1224 fe->i_links_count = cpu_to_le16(inode->i_nlink);
1225 fe->i_uid = cpu_to_le32(inode->i_uid);
1226 fe->i_gid = cpu_to_le32(inode->i_gid);
1227 fe->i_mode = cpu_to_le16(inode->i_mode);
1228 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1229 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1230 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1231 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1232 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1233 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1235 status = ocfs2_journal_dirty(handle, bh);
1248 * Updates a struct inode from a disk inode.
1249 * does no i/o, only takes ip_lock.
1251 void ocfs2_refresh_inode(struct inode *inode,
1252 struct ocfs2_dinode *fe)
1254 spin_lock(&OCFS2_I(inode)->ip_lock);
1256 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1257 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1258 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1259 ocfs2_set_inode_flags(inode);
1260 i_size_write(inode, le64_to_cpu(fe->i_size));
1261 inode->i_nlink = le16_to_cpu(fe->i_links_count);
1262 inode->i_uid = le32_to_cpu(fe->i_uid);
1263 inode->i_gid = le32_to_cpu(fe->i_gid);
1264 inode->i_mode = le16_to_cpu(fe->i_mode);
1265 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1266 inode->i_blocks = 0;
1268 inode->i_blocks = ocfs2_inode_sector_count(inode);
1269 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1270 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1271 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1272 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1273 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1274 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1276 spin_unlock(&OCFS2_I(inode)->ip_lock);