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"
54 #include "buffer_head_io.h"
56 struct ocfs2_find_inode_args
60 unsigned int fi_flags;
61 unsigned int fi_sysfile_type;
64 static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
66 static int ocfs2_read_locked_inode(struct inode *inode,
67 struct ocfs2_find_inode_args *args);
68 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
69 static int ocfs2_find_actor(struct inode *inode, void *opaque);
70 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
72 struct buffer_head *fe_bh);
74 void ocfs2_set_inode_flags(struct inode *inode)
76 unsigned int flags = OCFS2_I(inode)->ip_attr;
78 inode->i_flags &= ~(S_IMMUTABLE |
79 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
81 if (flags & OCFS2_IMMUTABLE_FL)
82 inode->i_flags |= S_IMMUTABLE;
84 if (flags & OCFS2_SYNC_FL)
85 inode->i_flags |= S_SYNC;
86 if (flags & OCFS2_APPEND_FL)
87 inode->i_flags |= S_APPEND;
88 if (flags & OCFS2_NOATIME_FL)
89 inode->i_flags |= S_NOATIME;
90 if (flags & OCFS2_DIRSYNC_FL)
91 inode->i_flags |= S_DIRSYNC;
94 /* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
95 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
97 unsigned int flags = oi->vfs_inode.i_flags;
99 oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
100 OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
102 oi->ip_attr |= OCFS2_SYNC_FL;
103 if (flags & S_APPEND)
104 oi->ip_attr |= OCFS2_APPEND_FL;
105 if (flags & S_IMMUTABLE)
106 oi->ip_attr |= OCFS2_IMMUTABLE_FL;
107 if (flags & S_NOATIME)
108 oi->ip_attr |= OCFS2_NOATIME_FL;
109 if (flags & S_DIRSYNC)
110 oi->ip_attr |= OCFS2_DIRSYNC_FL;
113 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
116 struct inode *inode = NULL;
117 struct super_block *sb = osb->sb;
118 struct ocfs2_find_inode_args args;
120 mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno);
122 /* Ok. By now we've either got the offsets passed to us by the
123 * caller, or we just pulled them off the bh. Lets do some
124 * sanity checks to make sure they're OK. */
126 inode = ERR_PTR(-EINVAL);
127 mlog_errno(PTR_ERR(inode));
131 args.fi_blkno = blkno;
132 args.fi_flags = flags;
133 args.fi_ino = ino_from_blkno(sb, blkno);
134 args.fi_sysfile_type = sysfile_type;
136 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
137 ocfs2_init_locked_inode, &args);
138 /* inode was *not* in the inode cache. 2.6.x requires
139 * us to do our own read_inode call and unlock it
141 if (inode && inode->i_state & I_NEW) {
142 mlog(0, "Inode was not in inode cache, reading it.\n");
143 ocfs2_read_locked_inode(inode, &args);
144 unlock_new_inode(inode);
147 inode = ERR_PTR(-ENOMEM);
148 mlog_errno(PTR_ERR(inode));
151 if (is_bad_inode(inode)) {
153 inode = ERR_PTR(-ESTALE);
158 if (!IS_ERR(inode)) {
159 mlog(0, "returning inode with number %llu\n",
160 (unsigned long long)OCFS2_I(inode)->ip_blkno);
161 mlog_exit_ptr(inode);
169 * here's how inodes get read from disk:
170 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
171 * found? : return the in-memory inode
172 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
175 static int ocfs2_find_actor(struct inode *inode, void *opaque)
177 struct ocfs2_find_inode_args *args = NULL;
178 struct ocfs2_inode_info *oi = OCFS2_I(inode);
181 mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque);
185 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
187 if (oi->ip_blkno != args->fi_blkno)
197 * initialize the new inode, but don't do anything that would cause
199 * return 0 on success, 1 on failure
201 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
203 struct ocfs2_find_inode_args *args = opaque;
205 mlog_entry("inode = %p, opaque = %p\n", inode, opaque);
207 inode->i_ino = args->fi_ino;
208 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
209 if (args->fi_sysfile_type != 0)
210 lockdep_set_class(&inode->i_mutex,
211 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
217 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
220 struct super_block *sb;
221 struct ocfs2_super *osb;
222 int status = -EINVAL;
225 mlog_entry("(0x%p, size:%llu)\n", inode,
226 (unsigned long long)le64_to_cpu(fe->i_size));
231 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
232 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
235 /* this means that read_inode cannot create a superblock inode
236 * today. change if needed. */
237 if (!OCFS2_IS_VALID_DINODE(fe) ||
238 !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
239 mlog(0, "Invalid dinode: i_ino=%lu, i_blkno=%llu, "
240 "signature = %.*s, flags = 0x%x\n",
242 (unsigned long long)le64_to_cpu(fe->i_blkno), 7,
243 fe->i_signature, le32_to_cpu(fe->i_flags));
247 if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) {
248 mlog(ML_ERROR, "file entry generation does not match "
249 "superblock! osb->fs_generation=%x, "
250 "fe->i_fs_generation=%x\n",
251 osb->fs_generation, le32_to_cpu(fe->i_fs_generation));
255 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
256 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
257 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
259 inode->i_version = 1;
260 inode->i_generation = le32_to_cpu(fe->i_generation);
261 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
262 inode->i_mode = le16_to_cpu(fe->i_mode);
263 inode->i_uid = le32_to_cpu(fe->i_uid);
264 inode->i_gid = le32_to_cpu(fe->i_gid);
266 /* Fast symlinks will have i_size but no allocated clusters. */
267 if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
270 inode->i_blocks = ocfs2_inode_sector_count(inode);
271 inode->i_mapping->a_ops = &ocfs2_aops;
272 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
273 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
274 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
275 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
276 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
277 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
279 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
281 "ip_blkno %llu != i_blkno %llu!\n",
282 (unsigned long long)OCFS2_I(inode)->ip_blkno,
283 (unsigned long long)le64_to_cpu(fe->i_blkno));
285 inode->i_nlink = le16_to_cpu(fe->i_links_count);
287 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
288 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
290 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
291 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
292 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
293 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
294 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
295 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
296 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
297 /* we can't actually hit this as read_inode can't
298 * handle superblocks today ;-) */
302 switch (inode->i_mode & S_IFMT) {
305 inode->i_fop = &ocfs2_fops;
307 inode->i_fop = &ocfs2_fops_no_plocks;
308 inode->i_op = &ocfs2_file_iops;
309 i_size_write(inode, le64_to_cpu(fe->i_size));
312 inode->i_op = &ocfs2_dir_iops;
314 inode->i_fop = &ocfs2_dops;
316 inode->i_fop = &ocfs2_dops_no_plocks;
317 i_size_write(inode, le64_to_cpu(fe->i_size));
320 if (ocfs2_inode_is_fast_symlink(inode))
321 inode->i_op = &ocfs2_fast_symlink_inode_operations;
323 inode->i_op = &ocfs2_symlink_inode_operations;
324 i_size_write(inode, le64_to_cpu(fe->i_size));
327 inode->i_op = &ocfs2_special_file_iops;
328 init_special_inode(inode, inode->i_mode,
334 inode->i_ino = ino_from_blkno(inode->i_sb,
335 le64_to_cpu(fe->i_blkno));
338 * If we ever want to create system files from kernel,
339 * the generation argument to
340 * ocfs2_inode_lock_res_init() will have to change.
342 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
344 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
345 OCFS2_LOCK_TYPE_META, 0, inode);
347 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
348 OCFS2_LOCK_TYPE_OPEN, 0, inode);
351 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
352 OCFS2_LOCK_TYPE_RW, inode->i_generation,
355 ocfs2_set_inode_flags(inode);
363 static int ocfs2_read_locked_inode(struct inode *inode,
364 struct ocfs2_find_inode_args *args)
366 struct super_block *sb;
367 struct ocfs2_super *osb;
368 struct ocfs2_dinode *fe;
369 struct buffer_head *bh = NULL;
370 int status, can_lock;
373 mlog_entry("(0x%p, 0x%p)\n", inode, args);
376 if (inode == NULL || inode->i_sb == NULL) {
377 mlog(ML_ERROR, "bad inode\n");
384 mlog(ML_ERROR, "bad inode args\n");
385 make_bad_inode(inode);
390 * To improve performance of cold-cache inode stats, we take
391 * the cluster lock here if possible.
393 * Generally, OCFS2 never trusts the contents of an inode
394 * unless it's holding a cluster lock, so taking it here isn't
395 * a correctness issue as much as it is a performance
398 * There are three times when taking the lock is not a good idea:
400 * 1) During startup, before we have initialized the DLM.
402 * 2) If we are reading certain system files which never get
403 * cluster locks (local alloc, truncate log).
405 * 3) If the process doing the iget() is responsible for
406 * orphan dir recovery. We're holding the orphan dir lock and
407 * can get into a deadlock with another process on another
408 * node in ->delete_inode().
410 * #1 and #2 can be simply solved by never taking the lock
411 * here for system files (which are the only type we read
412 * during mount). It's a heavier approach, but our main
413 * concern is user-accesible files anyway.
415 * #3 works itself out because we'll eventually take the
416 * cluster lock before trusting anything anyway.
418 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
419 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
420 && !ocfs2_mount_local(osb);
423 * To maintain backwards compatibility with older versions of
424 * ocfs2-tools, we still store the generation value for system
425 * files. The only ones that actually matter to userspace are
426 * the journals, but it's easier and inexpensive to just flag
427 * all system files similarly.
429 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
430 generation = osb->fs_generation;
432 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
433 OCFS2_LOCK_TYPE_META,
436 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
437 OCFS2_LOCK_TYPE_OPEN,
441 status = ocfs2_open_lock(inode);
443 make_bad_inode(inode);
447 status = ocfs2_inode_lock(inode, NULL, 0);
449 make_bad_inode(inode);
455 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
456 status = ocfs2_try_open_lock(inode, 0);
458 make_bad_inode(inode);
464 status = ocfs2_read_blocks(inode, args->fi_blkno, 1, &bh,
465 OCFS2_BH_IGNORE_CACHE);
467 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
474 fe = (struct ocfs2_dinode *) bh->b_data;
475 if (!OCFS2_IS_VALID_DINODE(fe)) {
476 mlog(0, "Invalid dinode #%llu: signature = %.*s\n",
477 (unsigned long long)args->fi_blkno, 7,
483 * This is a code bug. Right now the caller needs to
484 * understand whether it is asking for a system file inode or
485 * not so the proper lock names can be built.
487 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
488 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
489 "Inode %llu: system file state is ambigous\n",
490 (unsigned long long)args->fi_blkno);
492 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
493 S_ISBLK(le16_to_cpu(fe->i_mode)))
494 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
496 if (ocfs2_populate_inode(inode, fe, 0) < 0)
499 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
505 ocfs2_inode_unlock(inode, 0);
508 make_bad_inode(inode);
517 void ocfs2_sync_blockdev(struct super_block *sb)
519 sync_blockdev(sb->s_bdev);
522 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
524 struct buffer_head *fe_bh)
527 struct ocfs2_truncate_context *tc = NULL;
528 struct ocfs2_dinode *fe;
529 handle_t *handle = NULL;
533 fe = (struct ocfs2_dinode *) fe_bh->b_data;
536 * This check will also skip truncate of inodes with inline
537 * data and fast symlinks.
539 if (fe->i_clusters) {
540 if (ocfs2_should_order_data(inode))
541 ocfs2_begin_ordered_truncate(inode, 0);
543 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
544 if (IS_ERR(handle)) {
545 status = PTR_ERR(handle);
550 status = ocfs2_journal_access(handle, inode, fe_bh,
551 OCFS2_JOURNAL_ACCESS_WRITE);
557 i_size_write(inode, 0);
559 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
565 ocfs2_commit_trans(osb, handle);
568 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
574 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
583 ocfs2_commit_trans(osb, handle);
588 static int ocfs2_remove_inode(struct inode *inode,
589 struct buffer_head *di_bh,
590 struct inode *orphan_dir_inode,
591 struct buffer_head *orphan_dir_bh)
594 struct inode *inode_alloc_inode = NULL;
595 struct buffer_head *inode_alloc_bh = NULL;
597 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
598 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
601 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
602 le16_to_cpu(di->i_suballoc_slot));
603 if (!inode_alloc_inode) {
609 mutex_lock(&inode_alloc_inode->i_mutex);
610 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
612 mutex_unlock(&inode_alloc_inode->i_mutex);
618 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS);
619 if (IS_ERR(handle)) {
620 status = PTR_ERR(handle);
625 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
632 /* set the inodes dtime */
633 status = ocfs2_journal_access(handle, inode, di_bh,
634 OCFS2_JOURNAL_ACCESS_WRITE);
640 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
641 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
643 status = ocfs2_journal_dirty(handle, di_bh);
649 ocfs2_remove_from_cache(inode, di_bh);
651 status = ocfs2_free_dinode(handle, inode_alloc_inode,
657 ocfs2_commit_trans(osb, handle);
659 ocfs2_inode_unlock(inode_alloc_inode, 1);
660 mutex_unlock(&inode_alloc_inode->i_mutex);
661 brelse(inode_alloc_bh);
663 iput(inode_alloc_inode);
669 * Serialize with orphan dir recovery. If the process doing
670 * recovery on this orphan dir does an iget() with the dir
671 * i_mutex held, we'll deadlock here. Instead we detect this
672 * and exit early - recovery will wipe this inode for us.
674 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
679 spin_lock(&osb->osb_lock);
680 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
681 mlog(0, "Recovery is happening on orphan dir %d, will skip "
682 "this inode\n", slot);
686 /* This signals to the orphan recovery process that it should
687 * wait for us to handle the wipe. */
688 osb->osb_orphan_wipes[slot]++;
690 spin_unlock(&osb->osb_lock);
694 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
697 spin_lock(&osb->osb_lock);
698 osb->osb_orphan_wipes[slot]--;
699 spin_unlock(&osb->osb_lock);
701 wake_up(&osb->osb_wipe_event);
704 static int ocfs2_wipe_inode(struct inode *inode,
705 struct buffer_head *di_bh)
707 int status, orphaned_slot;
708 struct inode *orphan_dir_inode = NULL;
709 struct buffer_head *orphan_dir_bh = NULL;
710 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
711 struct ocfs2_dinode *di;
713 di = (struct ocfs2_dinode *) di_bh->b_data;
714 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
716 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
720 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
721 ORPHAN_DIR_SYSTEM_INODE,
723 if (!orphan_dir_inode) {
729 /* Lock the orphan dir. The lock will be held for the entire
730 * delete_inode operation. We do this now to avoid races with
731 * recovery completion on other nodes. */
732 mutex_lock(&orphan_dir_inode->i_mutex);
733 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
735 mutex_unlock(&orphan_dir_inode->i_mutex);
741 /* we do this while holding the orphan dir lock because we
742 * don't want recovery being run from another node to try an
743 * inode delete underneath us -- this will result in two nodes
744 * truncating the same file! */
745 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
748 goto bail_unlock_dir;
751 /*Free extended attribute resources associated with this inode.*/
752 status = ocfs2_xattr_remove(inode, di_bh);
755 goto bail_unlock_dir;
758 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
764 ocfs2_inode_unlock(orphan_dir_inode, 1);
765 mutex_unlock(&orphan_dir_inode->i_mutex);
766 brelse(orphan_dir_bh);
768 iput(orphan_dir_inode);
769 ocfs2_signal_wipe_completion(osb, orphaned_slot);
774 /* There is a series of simple checks that should be done before a
775 * trylock is even considered. Encapsulate those in this function. */
776 static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
779 struct ocfs2_inode_info *oi = OCFS2_I(inode);
780 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
782 /* We shouldn't be getting here for the root directory
784 if (inode == osb->root_inode) {
785 mlog(ML_ERROR, "Skipping delete of root inode.\n");
789 /* If we're coming from downconvert_thread we can't go into our own
790 * voting [hello, deadlock city!], so unforuntately we just
791 * have to skip deleting this guy. That's OK though because
792 * the node who's doing the actual deleting should handle it
794 if (current == osb->dc_task) {
795 mlog(0, "Skipping delete of %lu because we're currently "
796 "in downconvert\n", inode->i_ino);
800 spin_lock(&oi->ip_lock);
801 /* OCFS2 *never* deletes system files. This should technically
802 * never get here as system file inodes should always have a
803 * positive link count. */
804 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
805 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
806 (unsigned long long)oi->ip_blkno);
810 /* If we have allowd wipe of this inode for another node, it
811 * will be marked here so we can safely skip it. Recovery will
812 * cleanup any inodes we might inadvertantly skip here. */
813 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
814 mlog(0, "Skipping delete of %lu because another node "
815 "has done this for us.\n", inode->i_ino);
821 spin_unlock(&oi->ip_lock);
826 /* Query the cluster to determine whether we should wipe an inode from
829 * Requires the inode to have the cluster lock. */
830 static int ocfs2_query_inode_wipe(struct inode *inode,
831 struct buffer_head *di_bh,
835 struct ocfs2_inode_info *oi = OCFS2_I(inode);
836 struct ocfs2_dinode *di;
840 /* While we were waiting for the cluster lock in
841 * ocfs2_delete_inode, another node might have asked to delete
842 * the inode. Recheck our flags to catch this. */
843 if (!ocfs2_inode_is_valid_to_delete(inode)) {
844 mlog(0, "Skipping delete of %llu because flags changed\n",
845 (unsigned long long)oi->ip_blkno);
849 /* Now that we have an up to date inode, we can double check
851 if (inode->i_nlink) {
852 mlog(0, "Skipping delete of %llu because nlink = %u\n",
853 (unsigned long long)oi->ip_blkno, inode->i_nlink);
857 /* Do some basic inode verification... */
858 di = (struct ocfs2_dinode *) di_bh->b_data;
859 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
860 /* for lack of a better error? */
863 "Inode %llu (on-disk %llu) not orphaned! "
864 "Disk flags 0x%x, inode flags 0x%x\n",
865 (unsigned long long)oi->ip_blkno,
866 (unsigned long long)le64_to_cpu(di->i_blkno),
867 le32_to_cpu(di->i_flags), oi->ip_flags);
871 /* has someone already deleted us?! baaad... */
879 * This is how ocfs2 determines whether an inode is still live
880 * within the cluster. Every node takes a shared read lock on
881 * the inode open lock in ocfs2_read_locked_inode(). When we
882 * get to ->delete_inode(), each node tries to convert it's
883 * lock to an exclusive. Trylocks are serialized by the inode
884 * meta data lock. If the upconvert suceeds, we know the inode
885 * is no longer live and can be deleted.
887 * Though we call this with the meta data lock held, the
888 * trylock keeps us from ABBA deadlock.
890 status = ocfs2_try_open_lock(inode, 1);
891 if (status == -EAGAIN) {
893 mlog(0, "Skipping delete of %llu because it is in use on "
894 "other nodes\n", (unsigned long long)oi->ip_blkno);
903 mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n",
904 (unsigned long long)oi->ip_blkno,
905 le16_to_cpu(di->i_orphaned_slot));
911 /* Support function for ocfs2_delete_inode. Will help us keep the
912 * inode data in a consistent state for clear_inode. Always truncates
913 * pages, optionally sync's them first. */
914 static void ocfs2_cleanup_delete_inode(struct inode *inode,
917 mlog(0, "Cleanup inode %llu, sync = %d\n",
918 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
920 write_inode_now(inode, 1);
921 truncate_inode_pages(&inode->i_data, 0);
924 void ocfs2_delete_inode(struct inode *inode)
927 sigset_t blocked, oldset;
928 struct buffer_head *di_bh = NULL;
930 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
932 if (is_bad_inode(inode)) {
933 mlog(0, "Skipping delete of bad inode\n");
937 if (!ocfs2_inode_is_valid_to_delete(inode)) {
938 /* It's probably not necessary to truncate_inode_pages
939 * here but we do it for safety anyway (it will most
940 * likely be a no-op anyway) */
941 ocfs2_cleanup_delete_inode(inode, 0);
945 /* We want to block signals in delete_inode as the lock and
946 * messaging paths may return us -ERESTARTSYS. Which would
947 * cause us to exit early, resulting in inodes being orphaned
949 sigfillset(&blocked);
950 status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
953 ocfs2_cleanup_delete_inode(inode, 1);
957 /* Lock down the inode. This gives us an up to date view of
958 * it's metadata (for verification), and allows us to
959 * serialize delete_inode on multiple nodes.
961 * Even though we might be doing a truncate, we don't take the
962 * allocation lock here as it won't be needed - nobody will
963 * have the file open.
965 status = ocfs2_inode_lock(inode, &di_bh, 1);
967 if (status != -ENOENT)
969 ocfs2_cleanup_delete_inode(inode, 0);
973 /* Query the cluster. This will be the final decision made
974 * before we go ahead and wipe the inode. */
975 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
976 if (!wipe || status < 0) {
977 /* Error and remote inode busy both mean we won't be
978 * removing the inode, so they take almost the same
983 /* Someone in the cluster has disallowed a wipe of
984 * this inode, or it was never completely
985 * orphaned. Write out the pages and exit now. */
986 ocfs2_cleanup_delete_inode(inode, 1);
987 goto bail_unlock_inode;
990 ocfs2_cleanup_delete_inode(inode, 0);
992 status = ocfs2_wipe_inode(inode, di_bh);
994 if (status != -EDEADLK)
996 goto bail_unlock_inode;
1000 * Mark the inode as successfully deleted.
1002 * This is important for ocfs2_clear_inode() as it will check
1003 * this flag and skip any checkpointing work
1005 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1006 * the LVB for other nodes.
1008 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
1011 ocfs2_inode_unlock(inode, 1);
1014 status = sigprocmask(SIG_SETMASK, &oldset, NULL);
1022 void ocfs2_clear_inode(struct inode *inode)
1025 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1032 mlog(0, "Clearing inode: %llu, nlink = %u\n",
1033 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink);
1035 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1036 "Inode=%lu\n", inode->i_ino);
1038 /* To preven remote deletes we hold open lock before, now it
1039 * is time to unlock PR and EX open locks. */
1040 ocfs2_open_unlock(inode);
1042 /* Do these before all the other work so that we don't bounce
1043 * the downconvert thread while waiting to destroy the locks. */
1044 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
1045 ocfs2_mark_lockres_freeing(&oi->ip_inode_lockres);
1046 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
1048 /* We very well may get a clear_inode before all an inodes
1049 * metadata has hit disk. Of course, we can't drop any cluster
1050 * locks until the journal has finished with it. The only
1051 * exception here are successfully wiped inodes - their
1052 * metadata can now be considered to be part of the system
1053 * inodes from which it came. */
1054 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1055 ocfs2_checkpoint_inode(inode);
1057 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1058 "Clear inode of %llu, inode has io markers\n",
1059 (unsigned long long)oi->ip_blkno);
1061 ocfs2_extent_map_trunc(inode, 0);
1063 status = ocfs2_drop_inode_locks(inode);
1067 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1068 ocfs2_lock_res_free(&oi->ip_inode_lockres);
1069 ocfs2_lock_res_free(&oi->ip_open_lockres);
1071 ocfs2_metadata_cache_purge(inode);
1073 mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached,
1074 "Clear inode of %llu, inode has %u cache items\n",
1075 (unsigned long long)oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached);
1077 mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
1078 "Clear inode of %llu, inode has a bad flag\n",
1079 (unsigned long long)oi->ip_blkno);
1081 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1082 "Clear inode of %llu, inode is locked\n",
1083 (unsigned long long)oi->ip_blkno);
1085 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1086 "Clear inode of %llu, io_mutex is locked\n",
1087 (unsigned long long)oi->ip_blkno);
1088 mutex_unlock(&oi->ip_io_mutex);
1091 * down_trylock() returns 0, down_write_trylock() returns 1
1094 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1095 "Clear inode of %llu, alloc_sem is locked\n",
1096 (unsigned long long)oi->ip_blkno);
1097 up_write(&oi->ip_alloc_sem);
1099 mlog_bug_on_msg(oi->ip_open_count,
1100 "Clear inode of %llu has open count %d\n",
1101 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1103 /* Clear all other flags. */
1104 oi->ip_flags = OCFS2_INODE_CACHE_INLINE;
1105 oi->ip_created_trans = 0;
1106 oi->ip_last_trans = 0;
1107 oi->ip_dir_start_lookup = 0;
1108 oi->ip_blkno = 0ULL;
1109 jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
1116 /* Called under inode_lock, with no more references on the
1117 * struct inode, so it's safe here to check the flags field
1118 * and to manipulate i_nlink without any other locks. */
1119 void ocfs2_drop_inode(struct inode *inode)
1121 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1125 mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n",
1126 (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags);
1128 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1129 generic_delete_inode(inode);
1131 generic_drop_inode(inode);
1137 * This is called from our getattr.
1139 int ocfs2_inode_revalidate(struct dentry *dentry)
1141 struct inode *inode = dentry->d_inode;
1144 mlog_entry("(inode = 0x%p, ino = %llu)\n", inode,
1145 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL);
1148 mlog(0, "eep, no inode!\n");
1153 spin_lock(&OCFS2_I(inode)->ip_lock);
1154 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1155 spin_unlock(&OCFS2_I(inode)->ip_lock);
1156 mlog(0, "inode deleted!\n");
1160 spin_unlock(&OCFS2_I(inode)->ip_lock);
1162 /* Let ocfs2_inode_lock do the work of updating our struct
1164 status = ocfs2_inode_lock(inode, NULL, 0);
1166 if (status != -ENOENT)
1170 ocfs2_inode_unlock(inode, 0);
1178 * Updates a disk inode from a
1180 * Only takes ip_lock.
1182 int ocfs2_mark_inode_dirty(handle_t *handle,
1183 struct inode *inode,
1184 struct buffer_head *bh)
1187 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1189 mlog_entry("(inode %llu)\n",
1190 (unsigned long long)OCFS2_I(inode)->ip_blkno);
1192 status = ocfs2_journal_access(handle, inode, bh,
1193 OCFS2_JOURNAL_ACCESS_WRITE);
1199 spin_lock(&OCFS2_I(inode)->ip_lock);
1200 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1201 ocfs2_get_inode_flags(OCFS2_I(inode));
1202 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1203 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1204 spin_unlock(&OCFS2_I(inode)->ip_lock);
1206 fe->i_size = cpu_to_le64(i_size_read(inode));
1207 fe->i_links_count = cpu_to_le16(inode->i_nlink);
1208 fe->i_uid = cpu_to_le32(inode->i_uid);
1209 fe->i_gid = cpu_to_le32(inode->i_gid);
1210 fe->i_mode = cpu_to_le16(inode->i_mode);
1211 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1212 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1213 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1214 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1215 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1216 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1218 status = ocfs2_journal_dirty(handle, bh);
1231 * Updates a struct inode from a disk inode.
1232 * does no i/o, only takes ip_lock.
1234 void ocfs2_refresh_inode(struct inode *inode,
1235 struct ocfs2_dinode *fe)
1237 spin_lock(&OCFS2_I(inode)->ip_lock);
1239 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1240 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1241 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1242 ocfs2_set_inode_flags(inode);
1243 i_size_write(inode, le64_to_cpu(fe->i_size));
1244 inode->i_nlink = le16_to_cpu(fe->i_links_count);
1245 inode->i_uid = le32_to_cpu(fe->i_uid);
1246 inode->i_gid = le32_to_cpu(fe->i_gid);
1247 inode->i_mode = le16_to_cpu(fe->i_mode);
1248 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1249 inode->i_blocks = 0;
1251 inode->i_blocks = ocfs2_inode_sector_count(inode);
1252 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1253 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1254 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1255 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1256 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1257 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1259 spin_unlock(&OCFS2_I(inode)->ip_lock);