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>
31 #include <linux/smp_lock.h>
33 #include <asm/byteorder.h>
35 #define MLOG_MASK_PREFIX ML_INODE
36 #include <cluster/masklog.h>
42 #include "extent_map.h"
44 #include "heartbeat.h"
55 #include "buffer_head_io.h"
57 struct ocfs2_find_inode_args
61 unsigned int fi_flags;
64 static int ocfs2_read_locked_inode(struct inode *inode,
65 struct ocfs2_find_inode_args *args);
66 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
67 static int ocfs2_find_actor(struct inode *inode, void *opaque);
68 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
70 struct buffer_head *fe_bh);
72 void ocfs2_set_inode_flags(struct inode *inode)
74 unsigned int flags = OCFS2_I(inode)->ip_attr;
76 inode->i_flags &= ~(S_IMMUTABLE |
77 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
79 if (flags & OCFS2_IMMUTABLE_FL)
80 inode->i_flags |= S_IMMUTABLE;
82 if (flags & OCFS2_SYNC_FL)
83 inode->i_flags |= S_SYNC;
84 if (flags & OCFS2_APPEND_FL)
85 inode->i_flags |= S_APPEND;
86 if (flags & OCFS2_NOATIME_FL)
87 inode->i_flags |= S_NOATIME;
88 if (flags & OCFS2_DIRSYNC_FL)
89 inode->i_flags |= S_DIRSYNC;
92 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, int flags)
94 struct inode *inode = NULL;
95 struct super_block *sb = osb->sb;
96 struct ocfs2_find_inode_args args;
98 mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno);
100 /* Ok. By now we've either got the offsets passed to us by the
101 * caller, or we just pulled them off the bh. Lets do some
102 * sanity checks to make sure they're OK. */
104 inode = ERR_PTR(-EINVAL);
105 mlog_errno(PTR_ERR(inode));
109 args.fi_blkno = blkno;
110 args.fi_flags = flags;
111 args.fi_ino = ino_from_blkno(sb, blkno);
113 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
114 ocfs2_init_locked_inode, &args);
115 /* inode was *not* in the inode cache. 2.6.x requires
116 * us to do our own read_inode call and unlock it
118 if (inode && inode->i_state & I_NEW) {
119 mlog(0, "Inode was not in inode cache, reading it.\n");
120 ocfs2_read_locked_inode(inode, &args);
121 unlock_new_inode(inode);
124 inode = ERR_PTR(-ENOMEM);
125 mlog_errno(PTR_ERR(inode));
128 if (is_bad_inode(inode)) {
130 inode = ERR_PTR(-ESTALE);
135 if (!IS_ERR(inode)) {
136 mlog(0, "returning inode with number %llu\n",
137 (unsigned long long)OCFS2_I(inode)->ip_blkno);
138 mlog_exit_ptr(inode);
146 * here's how inodes get read from disk:
147 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
148 * found? : return the in-memory inode
149 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
152 static int ocfs2_find_actor(struct inode *inode, void *opaque)
154 struct ocfs2_find_inode_args *args = NULL;
155 struct ocfs2_inode_info *oi = OCFS2_I(inode);
158 mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque);
162 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
164 if (oi->ip_blkno != args->fi_blkno)
174 * initialize the new inode, but don't do anything that would cause
176 * return 0 on success, 1 on failure
178 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
180 struct ocfs2_find_inode_args *args = opaque;
182 mlog_entry("inode = %p, opaque = %p\n", inode, opaque);
184 inode->i_ino = args->fi_ino;
185 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
191 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
194 struct super_block *sb;
195 struct ocfs2_super *osb;
196 int status = -EINVAL;
198 mlog_entry("(0x%p, size:%llu)\n", inode,
199 (unsigned long long)fe->i_size);
204 /* this means that read_inode cannot create a superblock inode
205 * today. change if needed. */
206 if (!OCFS2_IS_VALID_DINODE(fe) ||
207 !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
208 mlog(0, "Invalid dinode: i_ino=%lu, i_blkno=%llu, "
209 "signature = %.*s, flags = 0x%x\n",
211 (unsigned long long)le64_to_cpu(fe->i_blkno), 7,
212 fe->i_signature, le32_to_cpu(fe->i_flags));
216 if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) {
217 mlog(ML_ERROR, "file entry generation does not match "
218 "superblock! osb->fs_generation=%x, "
219 "fe->i_fs_generation=%x\n",
220 osb->fs_generation, le32_to_cpu(fe->i_fs_generation));
224 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
225 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
227 inode->i_version = 1;
228 inode->i_generation = le32_to_cpu(fe->i_generation);
229 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
230 inode->i_mode = le16_to_cpu(fe->i_mode);
231 inode->i_uid = le32_to_cpu(fe->i_uid);
232 inode->i_gid = le32_to_cpu(fe->i_gid);
234 /* Fast symlinks will have i_size but no allocated clusters. */
235 if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
238 inode->i_blocks = ocfs2_inode_sector_count(inode);
239 inode->i_mapping->a_ops = &ocfs2_aops;
240 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
241 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
242 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
243 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
244 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
245 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
247 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
249 "ip_blkno %llu != i_blkno %llu!\n",
250 (unsigned long long)OCFS2_I(inode)->ip_blkno,
251 (unsigned long long)fe->i_blkno);
253 inode->i_nlink = le16_to_cpu(fe->i_links_count);
255 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
256 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
258 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
259 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
260 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
261 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
262 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
263 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
264 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
265 /* we can't actually hit this as read_inode can't
266 * handle superblocks today ;-) */
270 switch (inode->i_mode & S_IFMT) {
272 inode->i_fop = &ocfs2_fops;
273 inode->i_op = &ocfs2_file_iops;
274 i_size_write(inode, le64_to_cpu(fe->i_size));
277 inode->i_op = &ocfs2_dir_iops;
278 inode->i_fop = &ocfs2_dops;
279 i_size_write(inode, le64_to_cpu(fe->i_size));
282 if (ocfs2_inode_is_fast_symlink(inode))
283 inode->i_op = &ocfs2_fast_symlink_inode_operations;
285 inode->i_op = &ocfs2_symlink_inode_operations;
286 i_size_write(inode, le64_to_cpu(fe->i_size));
289 inode->i_op = &ocfs2_special_file_iops;
290 init_special_inode(inode, inode->i_mode,
296 inode->i_ino = ino_from_blkno(inode->i_sb,
297 le64_to_cpu(fe->i_blkno));
300 * If we ever want to create system files from kernel,
301 * the generation argument to
302 * ocfs2_inode_lock_res_init() will have to change.
304 BUG_ON(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL));
306 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
307 OCFS2_LOCK_TYPE_META, 0, inode);
309 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
310 OCFS2_LOCK_TYPE_OPEN, 0, inode);
313 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
314 OCFS2_LOCK_TYPE_RW, inode->i_generation,
317 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres,
318 OCFS2_LOCK_TYPE_DATA, inode->i_generation,
321 ocfs2_set_inode_flags(inode);
329 static int ocfs2_read_locked_inode(struct inode *inode,
330 struct ocfs2_find_inode_args *args)
332 struct super_block *sb;
333 struct ocfs2_super *osb;
334 struct ocfs2_dinode *fe;
335 struct buffer_head *bh = NULL;
336 int status, can_lock;
339 mlog_entry("(0x%p, 0x%p)\n", inode, args);
342 if (inode == NULL || inode->i_sb == NULL) {
343 mlog(ML_ERROR, "bad inode\n");
350 mlog(ML_ERROR, "bad inode args\n");
351 make_bad_inode(inode);
356 * To improve performance of cold-cache inode stats, we take
357 * the cluster lock here if possible.
359 * Generally, OCFS2 never trusts the contents of an inode
360 * unless it's holding a cluster lock, so taking it here isn't
361 * a correctness issue as much as it is a performance
364 * There are three times when taking the lock is not a good idea:
366 * 1) During startup, before we have initialized the DLM.
368 * 2) If we are reading certain system files which never get
369 * cluster locks (local alloc, truncate log).
371 * 3) If the process doing the iget() is responsible for
372 * orphan dir recovery. We're holding the orphan dir lock and
373 * can get into a deadlock with another process on another
374 * node in ->delete_inode().
376 * #1 and #2 can be simply solved by never taking the lock
377 * here for system files (which are the only type we read
378 * during mount). It's a heavier approach, but our main
379 * concern is user-accesible files anyway.
381 * #3 works itself out because we'll eventually take the
382 * cluster lock before trusting anything anyway.
384 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
385 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
386 && !ocfs2_mount_local(osb);
389 * To maintain backwards compatibility with older versions of
390 * ocfs2-tools, we still store the generation value for system
391 * files. The only ones that actually matter to userspace are
392 * the journals, but it's easier and inexpensive to just flag
393 * all system files similarly.
395 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
396 generation = osb->fs_generation;
398 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
399 OCFS2_LOCK_TYPE_META,
402 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
403 OCFS2_LOCK_TYPE_OPEN,
407 status = ocfs2_open_lock(inode);
409 make_bad_inode(inode);
413 status = ocfs2_meta_lock(inode, NULL, 0);
415 make_bad_inode(inode);
421 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
422 status = ocfs2_try_open_lock(inode, 0);
424 make_bad_inode(inode);
429 status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0,
430 can_lock ? inode : NULL);
437 fe = (struct ocfs2_dinode *) bh->b_data;
438 if (!OCFS2_IS_VALID_DINODE(fe)) {
439 mlog(ML_ERROR, "Invalid dinode #%llu: signature = %.*s\n",
440 (unsigned long long)fe->i_blkno, 7, fe->i_signature);
445 * This is a code bug. Right now the caller needs to
446 * understand whether it is asking for a system file inode or
447 * not so the proper lock names can be built.
449 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
450 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
451 "Inode %llu: system file state is ambigous\n",
452 (unsigned long long)args->fi_blkno);
454 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
455 S_ISBLK(le16_to_cpu(fe->i_mode)))
456 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
458 if (ocfs2_populate_inode(inode, fe, 0) < 0)
461 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
467 ocfs2_meta_unlock(inode, 0);
470 make_bad_inode(inode);
479 void ocfs2_sync_blockdev(struct super_block *sb)
481 sync_blockdev(sb->s_bdev);
484 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
486 struct buffer_head *fe_bh)
489 struct ocfs2_truncate_context *tc = NULL;
490 struct ocfs2_dinode *fe;
491 handle_t *handle = NULL;
495 fe = (struct ocfs2_dinode *) fe_bh->b_data;
497 if (fe->i_clusters) {
498 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
499 if (IS_ERR(handle)) {
500 status = PTR_ERR(handle);
505 status = ocfs2_journal_access(handle, inode, fe_bh,
506 OCFS2_JOURNAL_ACCESS_WRITE);
512 i_size_write(inode, 0);
514 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
520 ocfs2_commit_trans(osb, handle);
523 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
529 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
538 ocfs2_commit_trans(osb, handle);
543 static int ocfs2_remove_inode(struct inode *inode,
544 struct buffer_head *di_bh,
545 struct inode *orphan_dir_inode,
546 struct buffer_head *orphan_dir_bh)
549 struct inode *inode_alloc_inode = NULL;
550 struct buffer_head *inode_alloc_bh = NULL;
552 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
553 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
556 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
557 le16_to_cpu(di->i_suballoc_slot));
558 if (!inode_alloc_inode) {
564 mutex_lock(&inode_alloc_inode->i_mutex);
565 status = ocfs2_meta_lock(inode_alloc_inode, &inode_alloc_bh, 1);
567 mutex_unlock(&inode_alloc_inode->i_mutex);
573 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS);
574 if (IS_ERR(handle)) {
575 status = PTR_ERR(handle);
580 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
587 /* set the inodes dtime */
588 status = ocfs2_journal_access(handle, inode, di_bh,
589 OCFS2_JOURNAL_ACCESS_WRITE);
595 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
596 le32_and_cpu(&di->i_flags, ~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
598 status = ocfs2_journal_dirty(handle, di_bh);
604 ocfs2_remove_from_cache(inode, di_bh);
606 status = ocfs2_free_dinode(handle, inode_alloc_inode,
612 ocfs2_commit_trans(osb, handle);
614 ocfs2_meta_unlock(inode_alloc_inode, 1);
615 mutex_unlock(&inode_alloc_inode->i_mutex);
616 brelse(inode_alloc_bh);
618 iput(inode_alloc_inode);
624 * Serialize with orphan dir recovery. If the process doing
625 * recovery on this orphan dir does an iget() with the dir
626 * i_mutex held, we'll deadlock here. Instead we detect this
627 * and exit early - recovery will wipe this inode for us.
629 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
634 spin_lock(&osb->osb_lock);
635 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
636 mlog(0, "Recovery is happening on orphan dir %d, will skip "
637 "this inode\n", slot);
641 /* This signals to the orphan recovery process that it should
642 * wait for us to handle the wipe. */
643 osb->osb_orphan_wipes[slot]++;
645 spin_unlock(&osb->osb_lock);
649 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
652 spin_lock(&osb->osb_lock);
653 osb->osb_orphan_wipes[slot]--;
654 spin_unlock(&osb->osb_lock);
656 wake_up(&osb->osb_wipe_event);
659 static int ocfs2_wipe_inode(struct inode *inode,
660 struct buffer_head *di_bh)
662 int status, orphaned_slot;
663 struct inode *orphan_dir_inode = NULL;
664 struct buffer_head *orphan_dir_bh = NULL;
665 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
666 struct ocfs2_dinode *di;
668 di = (struct ocfs2_dinode *) di_bh->b_data;
669 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
671 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
675 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
676 ORPHAN_DIR_SYSTEM_INODE,
678 if (!orphan_dir_inode) {
684 /* Lock the orphan dir. The lock will be held for the entire
685 * delete_inode operation. We do this now to avoid races with
686 * recovery completion on other nodes. */
687 mutex_lock(&orphan_dir_inode->i_mutex);
688 status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1);
690 mutex_unlock(&orphan_dir_inode->i_mutex);
696 /* we do this while holding the orphan dir lock because we
697 * don't want recovery being run from another node to vote for
698 * an inode delete on us -- this will result in two nodes
699 * truncating the same file! */
700 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
703 goto bail_unlock_dir;
706 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
712 ocfs2_meta_unlock(orphan_dir_inode, 1);
713 mutex_unlock(&orphan_dir_inode->i_mutex);
714 brelse(orphan_dir_bh);
716 iput(orphan_dir_inode);
717 ocfs2_signal_wipe_completion(osb, orphaned_slot);
722 /* There is a series of simple checks that should be done before a
723 * vote is even considered. Encapsulate those in this function. */
724 static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
727 struct ocfs2_inode_info *oi = OCFS2_I(inode);
728 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
730 /* We shouldn't be getting here for the root directory
732 if (inode == osb->root_inode) {
733 mlog(ML_ERROR, "Skipping delete of root inode.\n");
737 /* If we're coming from process_vote we can't go into our own
738 * voting [hello, deadlock city!], so unforuntately we just
739 * have to skip deleting this guy. That's OK though because
740 * the node who's doing the actual deleting should handle it
742 if (current == osb->vote_task) {
743 mlog(0, "Skipping delete of %lu because we're currently "
744 "in process_vote\n", inode->i_ino);
748 spin_lock(&oi->ip_lock);
749 /* OCFS2 *never* deletes system files. This should technically
750 * never get here as system file inodes should always have a
751 * positive link count. */
752 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
753 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
754 (unsigned long long)oi->ip_blkno);
758 /* If we have voted "yes" on the wipe of this inode for
759 * another node, it will be marked here so we can safely skip
760 * it. Recovery will cleanup any inodes we might inadvertantly
762 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
763 mlog(0, "Skipping delete of %lu because another node "
764 "has done this for us.\n", inode->i_ino);
770 spin_unlock(&oi->ip_lock);
775 /* Query the cluster to determine whether we should wipe an inode from
778 * Requires the inode to have the cluster lock. */
779 static int ocfs2_query_inode_wipe(struct inode *inode,
780 struct buffer_head *di_bh,
784 struct ocfs2_inode_info *oi = OCFS2_I(inode);
785 struct ocfs2_dinode *di;
789 /* While we were waiting for the cluster lock in
790 * ocfs2_delete_inode, another node might have asked to delete
791 * the inode. Recheck our flags to catch this. */
792 if (!ocfs2_inode_is_valid_to_delete(inode)) {
793 mlog(0, "Skipping delete of %llu because flags changed\n",
794 (unsigned long long)oi->ip_blkno);
798 /* Now that we have an up to date inode, we can double check
800 if (inode->i_nlink) {
801 mlog(0, "Skipping delete of %llu because nlink = %u\n",
802 (unsigned long long)oi->ip_blkno, inode->i_nlink);
806 /* Do some basic inode verification... */
807 di = (struct ocfs2_dinode *) di_bh->b_data;
808 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
809 /* for lack of a better error? */
812 "Inode %llu (on-disk %llu) not orphaned! "
813 "Disk flags 0x%x, inode flags 0x%x\n",
814 (unsigned long long)oi->ip_blkno,
815 (unsigned long long)di->i_blkno, di->i_flags,
820 /* has someone already deleted us?! baaad... */
828 * This is how ocfs2 determines whether an inode is still live
829 * within the cluster. Every node takes a shared read lock on
830 * the inode open lock in ocfs2_read_locked_inode(). When we
831 * get to ->delete_inode(), each node tries to convert it's
832 * lock to an exclusive. Trylocks are serialized by the inode
833 * meta data lock. If the upconvert suceeds, we know the inode
834 * is no longer live and can be deleted.
836 * Though we call this with the meta data lock held, the
837 * trylock keeps us from ABBA deadlock.
839 status = ocfs2_try_open_lock(inode, 1);
840 if (status == -EAGAIN) {
842 mlog(0, "Skipping delete of %llu because it is in use on"
843 "other nodes\n", (unsigned long long)oi->ip_blkno);
852 mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n",
853 (unsigned long long)oi->ip_blkno,
854 le16_to_cpu(di->i_orphaned_slot));
860 /* Support function for ocfs2_delete_inode. Will help us keep the
861 * inode data in a consistent state for clear_inode. Always truncates
862 * pages, optionally sync's them first. */
863 static void ocfs2_cleanup_delete_inode(struct inode *inode,
866 mlog(0, "Cleanup inode %llu, sync = %d\n",
867 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
869 write_inode_now(inode, 1);
870 truncate_inode_pages(&inode->i_data, 0);
873 void ocfs2_delete_inode(struct inode *inode)
876 sigset_t blocked, oldset;
877 struct buffer_head *di_bh = NULL;
879 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
881 if (is_bad_inode(inode)) {
882 mlog(0, "Skipping delete of bad inode\n");
886 if (!ocfs2_inode_is_valid_to_delete(inode)) {
887 /* It's probably not necessary to truncate_inode_pages
888 * here but we do it for safety anyway (it will most
889 * likely be a no-op anyway) */
890 ocfs2_cleanup_delete_inode(inode, 0);
894 /* We want to block signals in delete_inode as the lock and
895 * messaging paths may return us -ERESTARTSYS. Which would
896 * cause us to exit early, resulting in inodes being orphaned
898 sigfillset(&blocked);
899 status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
902 ocfs2_cleanup_delete_inode(inode, 1);
906 /* Lock down the inode. This gives us an up to date view of
907 * it's metadata (for verification), and allows us to
908 * serialize delete_inode votes.
910 * Even though we might be doing a truncate, we don't take the
911 * allocation lock here as it won't be needed - nobody will
912 * have the file open.
914 status = ocfs2_meta_lock(inode, &di_bh, 1);
916 if (status != -ENOENT)
918 ocfs2_cleanup_delete_inode(inode, 0);
922 /* Query the cluster. This will be the final decision made
923 * before we go ahead and wipe the inode. */
924 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
925 if (!wipe || status < 0) {
926 /* Error and inode busy vote both mean we won't be
927 * removing the inode, so they take almost the same
932 /* Someone in the cluster has voted to not wipe this
933 * inode, or it was never completely orphaned. Write
934 * out the pages and exit now. */
935 ocfs2_cleanup_delete_inode(inode, 1);
936 goto bail_unlock_inode;
939 ocfs2_cleanup_delete_inode(inode, 0);
941 status = ocfs2_wipe_inode(inode, di_bh);
943 if (status != -EDEADLK)
945 goto bail_unlock_inode;
949 * Mark the inode as successfully deleted.
951 * This is important for ocfs2_clear_inode() as it will check
952 * this flag and skip any checkpointing work
954 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
955 * the LVB for other nodes.
957 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
960 ocfs2_meta_unlock(inode, 1);
963 status = sigprocmask(SIG_SETMASK, &oldset, NULL);
971 void ocfs2_clear_inode(struct inode *inode)
974 struct ocfs2_inode_info *oi = OCFS2_I(inode);
981 mlog(0, "Clearing inode: %llu, nlink = %u\n",
982 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink);
984 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
985 "Inode=%lu\n", inode->i_ino);
987 /* For remove delete_inode vote, we hold open lock before,
988 * now it is time to unlock PR and EX open locks. */
989 ocfs2_open_unlock(inode);
991 /* Do these before all the other work so that we don't bounce
992 * the vote thread while waiting to destroy the locks. */
993 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
994 ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres);
995 ocfs2_mark_lockres_freeing(&oi->ip_data_lockres);
996 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
998 /* We very well may get a clear_inode before all an inodes
999 * metadata has hit disk. Of course, we can't drop any cluster
1000 * locks until the journal has finished with it. The only
1001 * exception here are successfully wiped inodes - their
1002 * metadata can now be considered to be part of the system
1003 * inodes from which it came. */
1004 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1005 ocfs2_checkpoint_inode(inode);
1007 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1008 "Clear inode of %llu, inode has io markers\n",
1009 (unsigned long long)oi->ip_blkno);
1011 ocfs2_extent_map_trunc(inode, 0);
1013 status = ocfs2_drop_inode_locks(inode);
1017 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1018 ocfs2_lock_res_free(&oi->ip_meta_lockres);
1019 ocfs2_lock_res_free(&oi->ip_data_lockres);
1020 ocfs2_lock_res_free(&oi->ip_open_lockres);
1022 ocfs2_metadata_cache_purge(inode);
1024 mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached,
1025 "Clear inode of %llu, inode has %u cache items\n",
1026 (unsigned long long)oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached);
1028 mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
1029 "Clear inode of %llu, inode has a bad flag\n",
1030 (unsigned long long)oi->ip_blkno);
1032 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1033 "Clear inode of %llu, inode is locked\n",
1034 (unsigned long long)oi->ip_blkno);
1036 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1037 "Clear inode of %llu, io_mutex is locked\n",
1038 (unsigned long long)oi->ip_blkno);
1039 mutex_unlock(&oi->ip_io_mutex);
1042 * down_trylock() returns 0, down_write_trylock() returns 1
1045 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1046 "Clear inode of %llu, alloc_sem is locked\n",
1047 (unsigned long long)oi->ip_blkno);
1048 up_write(&oi->ip_alloc_sem);
1050 mlog_bug_on_msg(oi->ip_open_count,
1051 "Clear inode of %llu has open count %d\n",
1052 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1054 /* Clear all other flags. */
1055 oi->ip_flags = OCFS2_INODE_CACHE_INLINE;
1056 oi->ip_created_trans = 0;
1057 oi->ip_last_trans = 0;
1058 oi->ip_dir_start_lookup = 0;
1059 oi->ip_blkno = 0ULL;
1065 /* Called under inode_lock, with no more references on the
1066 * struct inode, so it's safe here to check the flags field
1067 * and to manipulate i_nlink without any other locks. */
1068 void ocfs2_drop_inode(struct inode *inode)
1070 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1074 mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n",
1075 (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags);
1077 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1078 generic_delete_inode(inode);
1080 generic_drop_inode(inode);
1086 * TODO: this should probably be merged into ocfs2_get_block
1088 * However, you now need to pay attention to the cont_prepare_write()
1089 * stuff in ocfs2_get_block (that is, ocfs2_get_block pretty much
1090 * expects never to extend).
1092 struct buffer_head *ocfs2_bread(struct inode *inode,
1093 int block, int *err, int reada)
1095 struct buffer_head *bh = NULL;
1098 int readflags = OCFS2_BH_CACHED;
1101 readflags |= OCFS2_BH_READAHEAD;
1103 if (((u64)block << inode->i_sb->s_blocksize_bits) >=
1104 i_size_read(inode)) {
1109 tmperr = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL,
1116 tmperr = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, &bh,
1136 * This is called from our getattr.
1138 int ocfs2_inode_revalidate(struct dentry *dentry)
1140 struct inode *inode = dentry->d_inode;
1143 mlog_entry("(inode = 0x%p, ino = %llu)\n", inode,
1144 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL);
1147 mlog(0, "eep, no inode!\n");
1152 spin_lock(&OCFS2_I(inode)->ip_lock);
1153 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1154 spin_unlock(&OCFS2_I(inode)->ip_lock);
1155 mlog(0, "inode deleted!\n");
1159 spin_unlock(&OCFS2_I(inode)->ip_lock);
1161 /* Let ocfs2_meta_lock do the work of updating our struct
1163 status = ocfs2_meta_lock(inode, NULL, 0);
1165 if (status != -ENOENT)
1169 ocfs2_meta_unlock(inode, 0);
1177 * Updates a disk inode from a
1179 * Only takes ip_lock.
1181 int ocfs2_mark_inode_dirty(handle_t *handle,
1182 struct inode *inode,
1183 struct buffer_head *bh)
1186 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1188 mlog_entry("(inode %llu)\n",
1189 (unsigned long long)OCFS2_I(inode)->ip_blkno);
1191 status = ocfs2_journal_access(handle, inode, bh,
1192 OCFS2_JOURNAL_ACCESS_WRITE);
1198 spin_lock(&OCFS2_I(inode)->ip_lock);
1199 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1200 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1201 spin_unlock(&OCFS2_I(inode)->ip_lock);
1203 fe->i_size = cpu_to_le64(i_size_read(inode));
1204 fe->i_links_count = cpu_to_le16(inode->i_nlink);
1205 fe->i_uid = cpu_to_le32(inode->i_uid);
1206 fe->i_gid = cpu_to_le32(inode->i_gid);
1207 fe->i_mode = cpu_to_le16(inode->i_mode);
1208 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1209 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1210 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1211 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1212 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1213 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1215 status = ocfs2_journal_dirty(handle, bh);
1228 * Updates a struct inode from a disk inode.
1229 * does no i/o, only takes ip_lock.
1231 void ocfs2_refresh_inode(struct inode *inode,
1232 struct ocfs2_dinode *fe)
1234 spin_lock(&OCFS2_I(inode)->ip_lock);
1236 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1237 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1238 ocfs2_set_inode_flags(inode);
1239 i_size_write(inode, le64_to_cpu(fe->i_size));
1240 inode->i_nlink = le16_to_cpu(fe->i_links_count);
1241 inode->i_uid = le32_to_cpu(fe->i_uid);
1242 inode->i_gid = le32_to_cpu(fe->i_gid);
1243 inode->i_mode = le16_to_cpu(fe->i_mode);
1244 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1245 inode->i_blocks = 0;
1247 inode->i_blocks = ocfs2_inode_sector_count(inode);
1248 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1249 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1250 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1251 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1252 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1253 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1255 spin_unlock(&OCFS2_I(inode)->ip_lock);