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/quotaops.h>
33 #include <asm/byteorder.h>
35 #define MLOG_MASK_PREFIX ML_INODE
36 #include <cluster/masklog.h>
42 #include "blockcheck.h"
44 #include "extent_map.h"
46 #include "heartbeat.h"
57 #include "buffer_head_io.h"
59 struct ocfs2_find_inode_args
63 unsigned int fi_flags;
64 unsigned int fi_sysfile_type;
67 static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
69 static int ocfs2_read_locked_inode(struct inode *inode,
70 struct ocfs2_find_inode_args *args);
71 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
72 static int ocfs2_find_actor(struct inode *inode, void *opaque);
73 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
75 struct buffer_head *fe_bh);
77 void ocfs2_set_inode_flags(struct inode *inode)
79 unsigned int flags = OCFS2_I(inode)->ip_attr;
81 inode->i_flags &= ~(S_IMMUTABLE |
82 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
84 if (flags & OCFS2_IMMUTABLE_FL)
85 inode->i_flags |= S_IMMUTABLE;
87 if (flags & OCFS2_SYNC_FL)
88 inode->i_flags |= S_SYNC;
89 if (flags & OCFS2_APPEND_FL)
90 inode->i_flags |= S_APPEND;
91 if (flags & OCFS2_NOATIME_FL)
92 inode->i_flags |= S_NOATIME;
93 if (flags & OCFS2_DIRSYNC_FL)
94 inode->i_flags |= S_DIRSYNC;
97 /* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
98 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
100 unsigned int flags = oi->vfs_inode.i_flags;
102 oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
103 OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
105 oi->ip_attr |= OCFS2_SYNC_FL;
106 if (flags & S_APPEND)
107 oi->ip_attr |= OCFS2_APPEND_FL;
108 if (flags & S_IMMUTABLE)
109 oi->ip_attr |= OCFS2_IMMUTABLE_FL;
110 if (flags & S_NOATIME)
111 oi->ip_attr |= OCFS2_NOATIME_FL;
112 if (flags & S_DIRSYNC)
113 oi->ip_attr |= OCFS2_DIRSYNC_FL;
116 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
119 struct inode *inode = NULL;
120 struct super_block *sb = osb->sb;
121 struct ocfs2_find_inode_args args;
123 mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno);
125 /* Ok. By now we've either got the offsets passed to us by the
126 * caller, or we just pulled them off the bh. Lets do some
127 * sanity checks to make sure they're OK. */
129 inode = ERR_PTR(-EINVAL);
130 mlog_errno(PTR_ERR(inode));
134 args.fi_blkno = blkno;
135 args.fi_flags = flags;
136 args.fi_ino = ino_from_blkno(sb, blkno);
137 args.fi_sysfile_type = sysfile_type;
139 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
140 ocfs2_init_locked_inode, &args);
141 /* inode was *not* in the inode cache. 2.6.x requires
142 * us to do our own read_inode call and unlock it
144 if (inode && inode->i_state & I_NEW) {
145 mlog(0, "Inode was not in inode cache, reading it.\n");
146 ocfs2_read_locked_inode(inode, &args);
147 unlock_new_inode(inode);
150 inode = ERR_PTR(-ENOMEM);
151 mlog_errno(PTR_ERR(inode));
154 if (is_bad_inode(inode)) {
156 inode = ERR_PTR(-ESTALE);
161 if (!IS_ERR(inode)) {
162 mlog(0, "returning inode with number %llu\n",
163 (unsigned long long)OCFS2_I(inode)->ip_blkno);
164 mlog_exit_ptr(inode);
172 * here's how inodes get read from disk:
173 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
174 * found? : return the in-memory inode
175 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
178 static int ocfs2_find_actor(struct inode *inode, void *opaque)
180 struct ocfs2_find_inode_args *args = NULL;
181 struct ocfs2_inode_info *oi = OCFS2_I(inode);
184 mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque);
188 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
190 if (oi->ip_blkno != args->fi_blkno)
200 * initialize the new inode, but don't do anything that would cause
202 * return 0 on success, 1 on failure
204 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
206 struct ocfs2_find_inode_args *args = opaque;
208 mlog_entry("inode = %p, opaque = %p\n", inode, opaque);
210 inode->i_ino = args->fi_ino;
211 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
212 if (args->fi_sysfile_type != 0)
213 lockdep_set_class(&inode->i_mutex,
214 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
220 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
223 struct super_block *sb;
224 struct ocfs2_super *osb;
227 mlog_entry("(0x%p, size:%llu)\n", inode,
228 (unsigned long long)le64_to_cpu(fe->i_size));
233 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
234 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
238 * These have all been checked by ocfs2_read_inode_block() or set
239 * by ocfs2_mknod_locked(), so a failure is a code bug.
241 BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode
242 cannot create a superblock
243 inode today. change if
245 BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
246 BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
249 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
250 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
251 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
253 inode->i_version = 1;
254 inode->i_generation = le32_to_cpu(fe->i_generation);
255 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
256 inode->i_mode = le16_to_cpu(fe->i_mode);
257 inode->i_uid = le32_to_cpu(fe->i_uid);
258 inode->i_gid = le32_to_cpu(fe->i_gid);
260 /* Fast symlinks will have i_size but no allocated clusters. */
261 if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
264 inode->i_blocks = ocfs2_inode_sector_count(inode);
265 inode->i_mapping->a_ops = &ocfs2_aops;
266 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
267 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
268 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
269 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
270 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
271 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
273 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
275 "ip_blkno %llu != i_blkno %llu!\n",
276 (unsigned long long)OCFS2_I(inode)->ip_blkno,
277 (unsigned long long)le64_to_cpu(fe->i_blkno));
279 inode->i_nlink = ocfs2_read_links_count(fe);
281 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
282 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
283 inode->i_flags |= S_NOQUOTA;
286 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
287 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
288 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
289 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
290 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
291 } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
292 inode->i_flags |= S_NOQUOTA;
293 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
294 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
295 /* we can't actually hit this as read_inode can't
296 * handle superblocks today ;-) */
300 switch (inode->i_mode & S_IFMT) {
303 inode->i_fop = &ocfs2_fops;
305 inode->i_fop = &ocfs2_fops_no_plocks;
306 inode->i_op = &ocfs2_file_iops;
307 i_size_write(inode, le64_to_cpu(fe->i_size));
310 inode->i_op = &ocfs2_dir_iops;
312 inode->i_fop = &ocfs2_dops;
314 inode->i_fop = &ocfs2_dops_no_plocks;
315 i_size_write(inode, le64_to_cpu(fe->i_size));
318 if (ocfs2_inode_is_fast_symlink(inode))
319 inode->i_op = &ocfs2_fast_symlink_inode_operations;
321 inode->i_op = &ocfs2_symlink_inode_operations;
322 i_size_write(inode, le64_to_cpu(fe->i_size));
325 inode->i_op = &ocfs2_special_file_iops;
326 init_special_inode(inode, inode->i_mode,
332 inode->i_ino = ino_from_blkno(inode->i_sb,
333 le64_to_cpu(fe->i_blkno));
336 * If we ever want to create system files from kernel,
337 * the generation argument to
338 * ocfs2_inode_lock_res_init() will have to change.
340 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
342 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
343 OCFS2_LOCK_TYPE_META, 0, inode);
345 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
346 OCFS2_LOCK_TYPE_OPEN, 0, inode);
349 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
350 OCFS2_LOCK_TYPE_RW, inode->i_generation,
353 ocfs2_set_inode_flags(inode);
358 static int ocfs2_read_locked_inode(struct inode *inode,
359 struct ocfs2_find_inode_args *args)
361 struct super_block *sb;
362 struct ocfs2_super *osb;
363 struct ocfs2_dinode *fe;
364 struct buffer_head *bh = NULL;
365 int status, can_lock;
368 mlog_entry("(0x%p, 0x%p)\n", inode, args);
371 if (inode == NULL || inode->i_sb == NULL) {
372 mlog(ML_ERROR, "bad inode\n");
379 mlog(ML_ERROR, "bad inode args\n");
380 make_bad_inode(inode);
385 * To improve performance of cold-cache inode stats, we take
386 * the cluster lock here if possible.
388 * Generally, OCFS2 never trusts the contents of an inode
389 * unless it's holding a cluster lock, so taking it here isn't
390 * a correctness issue as much as it is a performance
393 * There are three times when taking the lock is not a good idea:
395 * 1) During startup, before we have initialized the DLM.
397 * 2) If we are reading certain system files which never get
398 * cluster locks (local alloc, truncate log).
400 * 3) If the process doing the iget() is responsible for
401 * orphan dir recovery. We're holding the orphan dir lock and
402 * can get into a deadlock with another process on another
403 * node in ->delete_inode().
405 * #1 and #2 can be simply solved by never taking the lock
406 * here for system files (which are the only type we read
407 * during mount). It's a heavier approach, but our main
408 * concern is user-accesible files anyway.
410 * #3 works itself out because we'll eventually take the
411 * cluster lock before trusting anything anyway.
413 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
414 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
415 && !ocfs2_mount_local(osb);
418 * To maintain backwards compatibility with older versions of
419 * ocfs2-tools, we still store the generation value for system
420 * files. The only ones that actually matter to userspace are
421 * the journals, but it's easier and inexpensive to just flag
422 * all system files similarly.
424 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
425 generation = osb->fs_generation;
427 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
428 OCFS2_LOCK_TYPE_META,
431 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
432 OCFS2_LOCK_TYPE_OPEN,
436 status = ocfs2_open_lock(inode);
438 make_bad_inode(inode);
442 status = ocfs2_inode_lock(inode, NULL, 0);
444 make_bad_inode(inode);
450 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
451 status = ocfs2_try_open_lock(inode, 0);
453 make_bad_inode(inode);
459 status = ocfs2_read_inode_block_full(inode, &bh,
460 OCFS2_BH_IGNORE_CACHE);
462 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
464 status = ocfs2_validate_inode_block(osb->sb, bh);
472 fe = (struct ocfs2_dinode *) bh->b_data;
475 * This is a code bug. Right now the caller needs to
476 * understand whether it is asking for a system file inode or
477 * not so the proper lock names can be built.
479 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
480 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
481 "Inode %llu: system file state is ambigous\n",
482 (unsigned long long)args->fi_blkno);
484 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
485 S_ISBLK(le16_to_cpu(fe->i_mode)))
486 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
488 ocfs2_populate_inode(inode, fe, 0);
490 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
496 ocfs2_inode_unlock(inode, 0);
499 make_bad_inode(inode);
508 void ocfs2_sync_blockdev(struct super_block *sb)
510 sync_blockdev(sb->s_bdev);
513 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
515 struct buffer_head *fe_bh)
518 struct ocfs2_truncate_context *tc = NULL;
519 struct ocfs2_dinode *fe;
520 handle_t *handle = NULL;
524 fe = (struct ocfs2_dinode *) fe_bh->b_data;
527 * This check will also skip truncate of inodes with inline
528 * data and fast symlinks.
530 if (fe->i_clusters) {
531 if (ocfs2_should_order_data(inode))
532 ocfs2_begin_ordered_truncate(inode, 0);
534 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
535 if (IS_ERR(handle)) {
536 status = PTR_ERR(handle);
541 status = ocfs2_journal_access_di(handle, inode, fe_bh,
542 OCFS2_JOURNAL_ACCESS_WRITE);
548 i_size_write(inode, 0);
550 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
556 ocfs2_commit_trans(osb, handle);
559 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
565 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
574 ocfs2_commit_trans(osb, handle);
579 static int ocfs2_remove_inode(struct inode *inode,
580 struct buffer_head *di_bh,
581 struct inode *orphan_dir_inode,
582 struct buffer_head *orphan_dir_bh)
585 struct inode *inode_alloc_inode = NULL;
586 struct buffer_head *inode_alloc_bh = NULL;
588 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
589 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
592 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
593 le16_to_cpu(di->i_suballoc_slot));
594 if (!inode_alloc_inode) {
600 mutex_lock(&inode_alloc_inode->i_mutex);
601 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
603 mutex_unlock(&inode_alloc_inode->i_mutex);
609 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
610 ocfs2_quota_trans_credits(inode->i_sb));
611 if (IS_ERR(handle)) {
612 status = PTR_ERR(handle);
617 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
624 /* set the inodes dtime */
625 status = ocfs2_journal_access_di(handle, inode, di_bh,
626 OCFS2_JOURNAL_ACCESS_WRITE);
632 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
633 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
635 status = ocfs2_journal_dirty(handle, di_bh);
641 ocfs2_remove_from_cache(inode, di_bh);
642 vfs_dq_free_inode(inode);
644 status = ocfs2_free_dinode(handle, inode_alloc_inode,
650 ocfs2_commit_trans(osb, handle);
652 ocfs2_inode_unlock(inode_alloc_inode, 1);
653 mutex_unlock(&inode_alloc_inode->i_mutex);
654 brelse(inode_alloc_bh);
656 iput(inode_alloc_inode);
662 * Serialize with orphan dir recovery. If the process doing
663 * recovery on this orphan dir does an iget() with the dir
664 * i_mutex held, we'll deadlock here. Instead we detect this
665 * and exit early - recovery will wipe this inode for us.
667 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
672 spin_lock(&osb->osb_lock);
673 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
674 mlog(0, "Recovery is happening on orphan dir %d, will skip "
675 "this inode\n", slot);
679 /* This signals to the orphan recovery process that it should
680 * wait for us to handle the wipe. */
681 osb->osb_orphan_wipes[slot]++;
683 spin_unlock(&osb->osb_lock);
687 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
690 spin_lock(&osb->osb_lock);
691 osb->osb_orphan_wipes[slot]--;
692 spin_unlock(&osb->osb_lock);
694 wake_up(&osb->osb_wipe_event);
697 static int ocfs2_wipe_inode(struct inode *inode,
698 struct buffer_head *di_bh)
700 int status, orphaned_slot;
701 struct inode *orphan_dir_inode = NULL;
702 struct buffer_head *orphan_dir_bh = NULL;
703 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
704 struct ocfs2_dinode *di;
706 di = (struct ocfs2_dinode *) di_bh->b_data;
707 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
709 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
713 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
714 ORPHAN_DIR_SYSTEM_INODE,
716 if (!orphan_dir_inode) {
722 /* Lock the orphan dir. The lock will be held for the entire
723 * delete_inode operation. We do this now to avoid races with
724 * recovery completion on other nodes. */
725 mutex_lock(&orphan_dir_inode->i_mutex);
726 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
728 mutex_unlock(&orphan_dir_inode->i_mutex);
734 /* we do this while holding the orphan dir lock because we
735 * don't want recovery being run from another node to try an
736 * inode delete underneath us -- this will result in two nodes
737 * truncating the same file! */
738 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
741 goto bail_unlock_dir;
744 /* Remove any dir index tree */
745 if (S_ISDIR(inode->i_mode)) {
746 status = ocfs2_dx_dir_truncate(inode, di_bh);
749 goto bail_unlock_dir;
753 /*Free extended attribute resources associated with this inode.*/
754 status = ocfs2_xattr_remove(inode, di_bh);
757 goto bail_unlock_dir;
760 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
766 ocfs2_inode_unlock(orphan_dir_inode, 1);
767 mutex_unlock(&orphan_dir_inode->i_mutex);
768 brelse(orphan_dir_bh);
770 iput(orphan_dir_inode);
771 ocfs2_signal_wipe_completion(osb, orphaned_slot);
776 /* There is a series of simple checks that should be done before a
777 * trylock is even considered. Encapsulate those in this function. */
778 static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
781 struct ocfs2_inode_info *oi = OCFS2_I(inode);
782 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
784 /* We shouldn't be getting here for the root directory
786 if (inode == osb->root_inode) {
787 mlog(ML_ERROR, "Skipping delete of root inode.\n");
791 /* If we're coming from downconvert_thread we can't go into our own
792 * voting [hello, deadlock city!], so unforuntately we just
793 * have to skip deleting this guy. That's OK though because
794 * the node who's doing the actual deleting should handle it
796 if (current == osb->dc_task) {
797 mlog(0, "Skipping delete of %lu because we're currently "
798 "in downconvert\n", inode->i_ino);
802 spin_lock(&oi->ip_lock);
803 /* OCFS2 *never* deletes system files. This should technically
804 * never get here as system file inodes should always have a
805 * positive link count. */
806 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
807 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
808 (unsigned long long)oi->ip_blkno);
812 /* If we have allowd wipe of this inode for another node, it
813 * will be marked here so we can safely skip it. Recovery will
814 * cleanup any inodes we might inadvertantly skip here. */
815 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
816 mlog(0, "Skipping delete of %lu because another node "
817 "has done this for us.\n", inode->i_ino);
823 spin_unlock(&oi->ip_lock);
828 /* Query the cluster to determine whether we should wipe an inode from
831 * Requires the inode to have the cluster lock. */
832 static int ocfs2_query_inode_wipe(struct inode *inode,
833 struct buffer_head *di_bh,
837 struct ocfs2_inode_info *oi = OCFS2_I(inode);
838 struct ocfs2_dinode *di;
842 /* While we were waiting for the cluster lock in
843 * ocfs2_delete_inode, another node might have asked to delete
844 * the inode. Recheck our flags to catch this. */
845 if (!ocfs2_inode_is_valid_to_delete(inode)) {
846 mlog(0, "Skipping delete of %llu because flags changed\n",
847 (unsigned long long)oi->ip_blkno);
851 /* Now that we have an up to date inode, we can double check
853 if (inode->i_nlink) {
854 mlog(0, "Skipping delete of %llu because nlink = %u\n",
855 (unsigned long long)oi->ip_blkno, inode->i_nlink);
859 /* Do some basic inode verification... */
860 di = (struct ocfs2_dinode *) di_bh->b_data;
861 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
862 /* for lack of a better error? */
865 "Inode %llu (on-disk %llu) not orphaned! "
866 "Disk flags 0x%x, inode flags 0x%x\n",
867 (unsigned long long)oi->ip_blkno,
868 (unsigned long long)le64_to_cpu(di->i_blkno),
869 le32_to_cpu(di->i_flags), oi->ip_flags);
873 /* has someone already deleted us?! baaad... */
881 * This is how ocfs2 determines whether an inode is still live
882 * within the cluster. Every node takes a shared read lock on
883 * the inode open lock in ocfs2_read_locked_inode(). When we
884 * get to ->delete_inode(), each node tries to convert it's
885 * lock to an exclusive. Trylocks are serialized by the inode
886 * meta data lock. If the upconvert suceeds, we know the inode
887 * is no longer live and can be deleted.
889 * Though we call this with the meta data lock held, the
890 * trylock keeps us from ABBA deadlock.
892 status = ocfs2_try_open_lock(inode, 1);
893 if (status == -EAGAIN) {
895 mlog(0, "Skipping delete of %llu because it is in use on "
896 "other nodes\n", (unsigned long long)oi->ip_blkno);
905 mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n",
906 (unsigned long long)oi->ip_blkno,
907 le16_to_cpu(di->i_orphaned_slot));
913 /* Support function for ocfs2_delete_inode. Will help us keep the
914 * inode data in a consistent state for clear_inode. Always truncates
915 * pages, optionally sync's them first. */
916 static void ocfs2_cleanup_delete_inode(struct inode *inode,
919 mlog(0, "Cleanup inode %llu, sync = %d\n",
920 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
922 write_inode_now(inode, 1);
923 truncate_inode_pages(&inode->i_data, 0);
926 void ocfs2_delete_inode(struct inode *inode)
929 sigset_t blocked, oldset;
930 struct buffer_head *di_bh = NULL;
932 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
934 /* When we fail in read_inode() we mark inode as bad. The second test
935 * catches the case when inode allocation fails before allocating
936 * a block for inode. */
937 if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno) {
938 mlog(0, "Skipping delete of bad inode\n");
942 if (!ocfs2_inode_is_valid_to_delete(inode)) {
943 /* It's probably not necessary to truncate_inode_pages
944 * here but we do it for safety anyway (it will most
945 * likely be a no-op anyway) */
946 ocfs2_cleanup_delete_inode(inode, 0);
950 /* We want to block signals in delete_inode as the lock and
951 * messaging paths may return us -ERESTARTSYS. Which would
952 * cause us to exit early, resulting in inodes being orphaned
954 sigfillset(&blocked);
955 status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
958 ocfs2_cleanup_delete_inode(inode, 1);
962 /* Lock down the inode. This gives us an up to date view of
963 * it's metadata (for verification), and allows us to
964 * serialize delete_inode on multiple nodes.
966 * Even though we might be doing a truncate, we don't take the
967 * allocation lock here as it won't be needed - nobody will
968 * have the file open.
970 status = ocfs2_inode_lock(inode, &di_bh, 1);
972 if (status != -ENOENT)
974 ocfs2_cleanup_delete_inode(inode, 0);
978 /* Query the cluster. This will be the final decision made
979 * before we go ahead and wipe the inode. */
980 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
981 if (!wipe || status < 0) {
982 /* Error and remote inode busy both mean we won't be
983 * removing the inode, so they take almost the same
988 /* Someone in the cluster has disallowed a wipe of
989 * this inode, or it was never completely
990 * orphaned. Write out the pages and exit now. */
991 ocfs2_cleanup_delete_inode(inode, 1);
992 goto bail_unlock_inode;
995 ocfs2_cleanup_delete_inode(inode, 0);
997 status = ocfs2_wipe_inode(inode, di_bh);
999 if (status != -EDEADLK)
1001 goto bail_unlock_inode;
1005 * Mark the inode as successfully deleted.
1007 * This is important for ocfs2_clear_inode() as it will check
1008 * this flag and skip any checkpointing work
1010 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1011 * the LVB for other nodes.
1013 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
1016 ocfs2_inode_unlock(inode, 1);
1019 status = sigprocmask(SIG_SETMASK, &oldset, NULL);
1027 void ocfs2_clear_inode(struct inode *inode)
1030 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1037 mlog(0, "Clearing inode: %llu, nlink = %u\n",
1038 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink);
1040 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1041 "Inode=%lu\n", inode->i_ino);
1043 /* To preven remote deletes we hold open lock before, now it
1044 * is time to unlock PR and EX open locks. */
1045 ocfs2_open_unlock(inode);
1047 /* Do these before all the other work so that we don't bounce
1048 * the downconvert thread while waiting to destroy the locks. */
1049 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
1050 ocfs2_mark_lockres_freeing(&oi->ip_inode_lockres);
1051 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
1053 /* We very well may get a clear_inode before all an inodes
1054 * metadata has hit disk. Of course, we can't drop any cluster
1055 * locks until the journal has finished with it. The only
1056 * exception here are successfully wiped inodes - their
1057 * metadata can now be considered to be part of the system
1058 * inodes from which it came. */
1059 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1060 ocfs2_checkpoint_inode(inode);
1062 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1063 "Clear inode of %llu, inode has io markers\n",
1064 (unsigned long long)oi->ip_blkno);
1066 ocfs2_extent_map_trunc(inode, 0);
1068 status = ocfs2_drop_inode_locks(inode);
1072 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1073 ocfs2_lock_res_free(&oi->ip_inode_lockres);
1074 ocfs2_lock_res_free(&oi->ip_open_lockres);
1076 ocfs2_metadata_cache_purge(inode);
1078 mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached,
1079 "Clear inode of %llu, inode has %u cache items\n",
1080 (unsigned long long)oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached);
1082 mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
1083 "Clear inode of %llu, inode has a bad flag\n",
1084 (unsigned long long)oi->ip_blkno);
1086 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1087 "Clear inode of %llu, inode is locked\n",
1088 (unsigned long long)oi->ip_blkno);
1090 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1091 "Clear inode of %llu, io_mutex is locked\n",
1092 (unsigned long long)oi->ip_blkno);
1093 mutex_unlock(&oi->ip_io_mutex);
1096 * down_trylock() returns 0, down_write_trylock() returns 1
1099 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1100 "Clear inode of %llu, alloc_sem is locked\n",
1101 (unsigned long long)oi->ip_blkno);
1102 up_write(&oi->ip_alloc_sem);
1104 mlog_bug_on_msg(oi->ip_open_count,
1105 "Clear inode of %llu has open count %d\n",
1106 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1108 /* Clear all other flags. */
1109 oi->ip_flags = OCFS2_INODE_CACHE_INLINE;
1110 oi->ip_created_trans = 0;
1111 oi->ip_last_trans = 0;
1112 oi->ip_dir_start_lookup = 0;
1113 oi->ip_blkno = 0ULL;
1116 * ip_jinode is used to track txns against this inode. We ensure that
1117 * the journal is flushed before journal shutdown. Thus it is safe to
1118 * have inodes get cleaned up after journal shutdown.
1120 jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
1127 /* Called under inode_lock, with no more references on the
1128 * struct inode, so it's safe here to check the flags field
1129 * and to manipulate i_nlink without any other locks. */
1130 void ocfs2_drop_inode(struct inode *inode)
1132 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1136 mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n",
1137 (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags);
1139 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1140 generic_delete_inode(inode);
1142 generic_drop_inode(inode);
1148 * This is called from our getattr.
1150 int ocfs2_inode_revalidate(struct dentry *dentry)
1152 struct inode *inode = dentry->d_inode;
1155 mlog_entry("(inode = 0x%p, ino = %llu)\n", inode,
1156 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL);
1159 mlog(0, "eep, no inode!\n");
1164 spin_lock(&OCFS2_I(inode)->ip_lock);
1165 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1166 spin_unlock(&OCFS2_I(inode)->ip_lock);
1167 mlog(0, "inode deleted!\n");
1171 spin_unlock(&OCFS2_I(inode)->ip_lock);
1173 /* Let ocfs2_inode_lock do the work of updating our struct
1175 status = ocfs2_inode_lock(inode, NULL, 0);
1177 if (status != -ENOENT)
1181 ocfs2_inode_unlock(inode, 0);
1189 * Updates a disk inode from a
1191 * Only takes ip_lock.
1193 int ocfs2_mark_inode_dirty(handle_t *handle,
1194 struct inode *inode,
1195 struct buffer_head *bh)
1198 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1200 mlog_entry("(inode %llu)\n",
1201 (unsigned long long)OCFS2_I(inode)->ip_blkno);
1203 status = ocfs2_journal_access_di(handle, inode, bh,
1204 OCFS2_JOURNAL_ACCESS_WRITE);
1210 spin_lock(&OCFS2_I(inode)->ip_lock);
1211 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1212 ocfs2_get_inode_flags(OCFS2_I(inode));
1213 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1214 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1215 spin_unlock(&OCFS2_I(inode)->ip_lock);
1217 fe->i_size = cpu_to_le64(i_size_read(inode));
1218 ocfs2_set_links_count(fe, inode->i_nlink);
1219 fe->i_uid = cpu_to_le32(inode->i_uid);
1220 fe->i_gid = cpu_to_le32(inode->i_gid);
1221 fe->i_mode = cpu_to_le16(inode->i_mode);
1222 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1223 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1224 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1225 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1226 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1227 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1229 status = ocfs2_journal_dirty(handle, bh);
1242 * Updates a struct inode from a disk inode.
1243 * does no i/o, only takes ip_lock.
1245 void ocfs2_refresh_inode(struct inode *inode,
1246 struct ocfs2_dinode *fe)
1248 spin_lock(&OCFS2_I(inode)->ip_lock);
1250 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1251 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1252 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1253 ocfs2_set_inode_flags(inode);
1254 i_size_write(inode, le64_to_cpu(fe->i_size));
1255 inode->i_nlink = ocfs2_read_links_count(fe);
1256 inode->i_uid = le32_to_cpu(fe->i_uid);
1257 inode->i_gid = le32_to_cpu(fe->i_gid);
1258 inode->i_mode = le16_to_cpu(fe->i_mode);
1259 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1260 inode->i_blocks = 0;
1262 inode->i_blocks = ocfs2_inode_sector_count(inode);
1263 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1264 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1265 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1266 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1267 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1268 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1270 spin_unlock(&OCFS2_I(inode)->ip_lock);
1273 int ocfs2_validate_inode_block(struct super_block *sb,
1274 struct buffer_head *bh)
1277 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1279 mlog(0, "Validating dinode %llu\n",
1280 (unsigned long long)bh->b_blocknr);
1282 BUG_ON(!buffer_uptodate(bh));
1285 * If the ecc fails, we return the error but otherwise
1286 * leave the filesystem running. We know any error is
1287 * local to this block.
1289 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1291 mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
1292 (unsigned long long)bh->b_blocknr);
1297 * Errors after here are fatal.
1302 if (!OCFS2_IS_VALID_DINODE(di)) {
1303 ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
1304 (unsigned long long)bh->b_blocknr, 7,
1309 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1310 ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
1311 (unsigned long long)bh->b_blocknr,
1312 (unsigned long long)le64_to_cpu(di->i_blkno));
1316 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1318 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
1319 (unsigned long long)bh->b_blocknr);
1323 if (le32_to_cpu(di->i_fs_generation) !=
1324 OCFS2_SB(sb)->fs_generation) {
1326 "Invalid dinode #%llu: fs_generation is %u\n",
1327 (unsigned long long)bh->b_blocknr,
1328 le32_to_cpu(di->i_fs_generation));
1338 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
1342 struct buffer_head *tmp = *bh;
1344 rc = ocfs2_read_blocks(inode, OCFS2_I(inode)->ip_blkno, 1, &tmp,
1345 flags, ocfs2_validate_inode_block);
1347 /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1354 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
1356 return ocfs2_read_inode_block_full(inode, bh, 0);