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 inode->i_version = 1;
225 inode->i_generation = le32_to_cpu(fe->i_generation);
226 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
227 inode->i_mode = le16_to_cpu(fe->i_mode);
228 inode->i_uid = le32_to_cpu(fe->i_uid);
229 inode->i_gid = le32_to_cpu(fe->i_gid);
231 /* Fast symlinks will have i_size but no allocated clusters. */
232 if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
236 ocfs2_align_bytes_to_sectors(le64_to_cpu(fe->i_size));
237 inode->i_mapping->a_ops = &ocfs2_aops;
238 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
239 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
240 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
241 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
242 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
243 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
245 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
247 "ip_blkno %llu != i_blkno %llu!\n",
248 (unsigned long long)OCFS2_I(inode)->ip_blkno,
249 (unsigned long long)fe->i_blkno);
251 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
252 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
254 inode->i_nlink = le16_to_cpu(fe->i_links_count);
256 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
257 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
259 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
260 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
261 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
262 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
263 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
264 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
265 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
266 /* we can't actually hit this as read_inode can't
267 * handle superblocks today ;-) */
271 switch (inode->i_mode & S_IFMT) {
273 inode->i_fop = &ocfs2_fops;
274 inode->i_op = &ocfs2_file_iops;
275 i_size_write(inode, le64_to_cpu(fe->i_size));
278 inode->i_op = &ocfs2_dir_iops;
279 inode->i_fop = &ocfs2_dops;
280 i_size_write(inode, le64_to_cpu(fe->i_size));
283 if (ocfs2_inode_is_fast_symlink(inode))
284 inode->i_op = &ocfs2_fast_symlink_inode_operations;
286 inode->i_op = &ocfs2_symlink_inode_operations;
287 i_size_write(inode, le64_to_cpu(fe->i_size));
290 inode->i_op = &ocfs2_special_file_iops;
291 init_special_inode(inode, inode->i_mode,
297 inode->i_ino = ino_from_blkno(inode->i_sb,
298 le64_to_cpu(fe->i_blkno));
301 * If we ever want to create system files from kernel,
302 * the generation argument to
303 * ocfs2_inode_lock_res_init() will have to change.
305 BUG_ON(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL));
307 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
308 OCFS2_LOCK_TYPE_META, 0, inode);
310 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
311 OCFS2_LOCK_TYPE_OPEN, 0, inode);
314 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
315 OCFS2_LOCK_TYPE_RW, inode->i_generation,
318 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres,
319 OCFS2_LOCK_TYPE_DATA, inode->i_generation,
322 ocfs2_set_inode_flags(inode);
330 static int ocfs2_read_locked_inode(struct inode *inode,
331 struct ocfs2_find_inode_args *args)
333 struct super_block *sb;
334 struct ocfs2_super *osb;
335 struct ocfs2_dinode *fe;
336 struct buffer_head *bh = NULL;
337 int status, can_lock;
340 mlog_entry("(0x%p, 0x%p)\n", inode, args);
343 if (inode == NULL || inode->i_sb == NULL) {
344 mlog(ML_ERROR, "bad inode\n");
351 mlog(ML_ERROR, "bad inode args\n");
352 make_bad_inode(inode);
357 * To improve performance of cold-cache inode stats, we take
358 * the cluster lock here if possible.
360 * Generally, OCFS2 never trusts the contents of an inode
361 * unless it's holding a cluster lock, so taking it here isn't
362 * a correctness issue as much as it is a performance
365 * There are three times when taking the lock is not a good idea:
367 * 1) During startup, before we have initialized the DLM.
369 * 2) If we are reading certain system files which never get
370 * cluster locks (local alloc, truncate log).
372 * 3) If the process doing the iget() is responsible for
373 * orphan dir recovery. We're holding the orphan dir lock and
374 * can get into a deadlock with another process on another
375 * node in ->delete_inode().
377 * #1 and #2 can be simply solved by never taking the lock
378 * here for system files (which are the only type we read
379 * during mount). It's a heavier approach, but our main
380 * concern is user-accesible files anyway.
382 * #3 works itself out because we'll eventually take the
383 * cluster lock before trusting anything anyway.
385 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
386 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
387 && !ocfs2_mount_local(osb);
390 * To maintain backwards compatibility with older versions of
391 * ocfs2-tools, we still store the generation value for system
392 * files. The only ones that actually matter to userspace are
393 * the journals, but it's easier and inexpensive to just flag
394 * all system files similarly.
396 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
397 generation = osb->fs_generation;
399 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
400 OCFS2_LOCK_TYPE_META,
403 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
404 OCFS2_LOCK_TYPE_OPEN,
408 status = ocfs2_open_lock(inode);
410 make_bad_inode(inode);
414 status = ocfs2_meta_lock(inode, NULL, 0);
416 make_bad_inode(inode);
422 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
423 status = ocfs2_try_open_lock(inode, 0);
425 make_bad_inode(inode);
430 status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0,
431 can_lock ? inode : NULL);
438 fe = (struct ocfs2_dinode *) bh->b_data;
439 if (!OCFS2_IS_VALID_DINODE(fe)) {
440 mlog(ML_ERROR, "Invalid dinode #%llu: signature = %.*s\n",
441 (unsigned long long)fe->i_blkno, 7, fe->i_signature);
446 * This is a code bug. Right now the caller needs to
447 * understand whether it is asking for a system file inode or
448 * not so the proper lock names can be built.
450 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
451 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
452 "Inode %llu: system file state is ambigous\n",
453 (unsigned long long)args->fi_blkno);
455 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
456 S_ISBLK(le16_to_cpu(fe->i_mode)))
457 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
459 if (ocfs2_populate_inode(inode, fe, 0) < 0)
462 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
468 ocfs2_meta_unlock(inode, 0);
471 make_bad_inode(inode);
480 void ocfs2_sync_blockdev(struct super_block *sb)
482 sync_blockdev(sb->s_bdev);
485 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
487 struct buffer_head *fe_bh)
490 struct ocfs2_truncate_context *tc = NULL;
491 struct ocfs2_dinode *fe;
492 handle_t *handle = NULL;
496 fe = (struct ocfs2_dinode *) fe_bh->b_data;
498 if (fe->i_clusters) {
499 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
500 if (IS_ERR(handle)) {
501 status = PTR_ERR(handle);
506 status = ocfs2_journal_access(handle, inode, fe_bh,
507 OCFS2_JOURNAL_ACCESS_WRITE);
513 i_size_write(inode, 0);
515 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
521 ocfs2_commit_trans(osb, handle);
524 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
530 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
539 ocfs2_commit_trans(osb, handle);
544 static int ocfs2_remove_inode(struct inode *inode,
545 struct buffer_head *di_bh,
546 struct inode *orphan_dir_inode,
547 struct buffer_head *orphan_dir_bh)
550 struct inode *inode_alloc_inode = NULL;
551 struct buffer_head *inode_alloc_bh = NULL;
553 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
554 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
557 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
558 le16_to_cpu(di->i_suballoc_slot));
559 if (!inode_alloc_inode) {
565 mutex_lock(&inode_alloc_inode->i_mutex);
566 status = ocfs2_meta_lock(inode_alloc_inode, &inode_alloc_bh, 1);
568 mutex_unlock(&inode_alloc_inode->i_mutex);
574 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS);
575 if (IS_ERR(handle)) {
576 status = PTR_ERR(handle);
581 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
588 /* set the inodes dtime */
589 status = ocfs2_journal_access(handle, inode, di_bh,
590 OCFS2_JOURNAL_ACCESS_WRITE);
596 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
597 le32_and_cpu(&di->i_flags, ~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
599 status = ocfs2_journal_dirty(handle, di_bh);
605 ocfs2_remove_from_cache(inode, di_bh);
607 status = ocfs2_free_dinode(handle, inode_alloc_inode,
613 ocfs2_commit_trans(osb, handle);
615 ocfs2_meta_unlock(inode_alloc_inode, 1);
616 mutex_unlock(&inode_alloc_inode->i_mutex);
617 brelse(inode_alloc_bh);
619 iput(inode_alloc_inode);
625 * Serialize with orphan dir recovery. If the process doing
626 * recovery on this orphan dir does an iget() with the dir
627 * i_mutex held, we'll deadlock here. Instead we detect this
628 * and exit early - recovery will wipe this inode for us.
630 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
635 spin_lock(&osb->osb_lock);
636 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
637 mlog(0, "Recovery is happening on orphan dir %d, will skip "
638 "this inode\n", slot);
642 /* This signals to the orphan recovery process that it should
643 * wait for us to handle the wipe. */
644 osb->osb_orphan_wipes[slot]++;
646 spin_unlock(&osb->osb_lock);
650 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
653 spin_lock(&osb->osb_lock);
654 osb->osb_orphan_wipes[slot]--;
655 spin_unlock(&osb->osb_lock);
657 wake_up(&osb->osb_wipe_event);
660 static int ocfs2_wipe_inode(struct inode *inode,
661 struct buffer_head *di_bh)
663 int status, orphaned_slot;
664 struct inode *orphan_dir_inode = NULL;
665 struct buffer_head *orphan_dir_bh = NULL;
666 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
667 struct ocfs2_dinode *di;
669 di = (struct ocfs2_dinode *) di_bh->b_data;
670 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
672 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
676 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
677 ORPHAN_DIR_SYSTEM_INODE,
679 if (!orphan_dir_inode) {
685 /* Lock the orphan dir. The lock will be held for the entire
686 * delete_inode operation. We do this now to avoid races with
687 * recovery completion on other nodes. */
688 mutex_lock(&orphan_dir_inode->i_mutex);
689 status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1);
691 mutex_unlock(&orphan_dir_inode->i_mutex);
697 /* we do this while holding the orphan dir lock because we
698 * don't want recovery being run from another node to vote for
699 * an inode delete on us -- this will result in two nodes
700 * truncating the same file! */
701 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
704 goto bail_unlock_dir;
707 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
713 ocfs2_meta_unlock(orphan_dir_inode, 1);
714 mutex_unlock(&orphan_dir_inode->i_mutex);
715 brelse(orphan_dir_bh);
717 iput(orphan_dir_inode);
718 ocfs2_signal_wipe_completion(osb, orphaned_slot);
723 /* There is a series of simple checks that should be done before a
724 * vote is even considered. Encapsulate those in this function. */
725 static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
728 struct ocfs2_inode_info *oi = OCFS2_I(inode);
729 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
731 /* We shouldn't be getting here for the root directory
733 if (inode == osb->root_inode) {
734 mlog(ML_ERROR, "Skipping delete of root inode.\n");
738 /* If we're coming from process_vote we can't go into our own
739 * voting [hello, deadlock city!], so unforuntately we just
740 * have to skip deleting this guy. That's OK though because
741 * the node who's doing the actual deleting should handle it
743 if (current == osb->vote_task) {
744 mlog(0, "Skipping delete of %lu because we're currently "
745 "in process_vote\n", inode->i_ino);
749 spin_lock(&oi->ip_lock);
750 /* OCFS2 *never* deletes system files. This should technically
751 * never get here as system file inodes should always have a
752 * positive link count. */
753 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
754 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
755 (unsigned long long)oi->ip_blkno);
759 /* If we have voted "yes" on the wipe of this inode for
760 * another node, it will be marked here so we can safely skip
761 * it. Recovery will cleanup any inodes we might inadvertantly
763 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
764 mlog(0, "Skipping delete of %lu because another node "
765 "has done this for us.\n", inode->i_ino);
771 spin_unlock(&oi->ip_lock);
776 /* Query the cluster to determine whether we should wipe an inode from
779 * Requires the inode to have the cluster lock. */
780 static int ocfs2_query_inode_wipe(struct inode *inode,
781 struct buffer_head *di_bh,
785 struct ocfs2_inode_info *oi = OCFS2_I(inode);
786 struct ocfs2_dinode *di;
790 /* While we were waiting for the cluster lock in
791 * ocfs2_delete_inode, another node might have asked to delete
792 * the inode. Recheck our flags to catch this. */
793 if (!ocfs2_inode_is_valid_to_delete(inode)) {
794 mlog(0, "Skipping delete of %llu because flags changed\n",
795 (unsigned long long)oi->ip_blkno);
799 /* Now that we have an up to date inode, we can double check
801 if (inode->i_nlink) {
802 mlog(0, "Skipping delete of %llu because nlink = %u\n",
803 (unsigned long long)oi->ip_blkno, inode->i_nlink);
807 /* Do some basic inode verification... */
808 di = (struct ocfs2_dinode *) di_bh->b_data;
809 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
810 /* for lack of a better error? */
813 "Inode %llu (on-disk %llu) not orphaned! "
814 "Disk flags 0x%x, inode flags 0x%x\n",
815 (unsigned long long)oi->ip_blkno,
816 (unsigned long long)di->i_blkno, di->i_flags,
821 /* has someone already deleted us?! baaad... */
829 * This is how ocfs2 determines whether an inode is still live
830 * within the cluster. Every node takes a shared read lock on
831 * the inode open lock in ocfs2_read_locked_inode(). When we
832 * get to ->delete_inode(), each node tries to convert it's
833 * lock to an exclusive. Trylocks are serialized by the inode
834 * meta data lock. If the upconvert suceeds, we know the inode
835 * is no longer live and can be deleted.
837 * Though we call this with the meta data lock held, the
838 * trylock keeps us from ABBA deadlock.
840 status = ocfs2_try_open_lock(inode, 1);
841 if (status == -EAGAIN) {
843 mlog(0, "Skipping delete of %llu because it is in use on"
844 "other nodes\n", (unsigned long long)oi->ip_blkno);
853 mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n",
854 (unsigned long long)oi->ip_blkno,
855 le16_to_cpu(di->i_orphaned_slot));
861 /* Support function for ocfs2_delete_inode. Will help us keep the
862 * inode data in a consistent state for clear_inode. Always truncates
863 * pages, optionally sync's them first. */
864 static void ocfs2_cleanup_delete_inode(struct inode *inode,
867 mlog(0, "Cleanup inode %llu, sync = %d\n",
868 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
870 write_inode_now(inode, 1);
871 truncate_inode_pages(&inode->i_data, 0);
874 void ocfs2_delete_inode(struct inode *inode)
877 sigset_t blocked, oldset;
878 struct buffer_head *di_bh = NULL;
880 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
882 if (is_bad_inode(inode)) {
883 mlog(0, "Skipping delete of bad inode\n");
887 if (!ocfs2_inode_is_valid_to_delete(inode)) {
888 /* It's probably not necessary to truncate_inode_pages
889 * here but we do it for safety anyway (it will most
890 * likely be a no-op anyway) */
891 ocfs2_cleanup_delete_inode(inode, 0);
895 /* We want to block signals in delete_inode as the lock and
896 * messaging paths may return us -ERESTARTSYS. Which would
897 * cause us to exit early, resulting in inodes being orphaned
899 sigfillset(&blocked);
900 status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
903 ocfs2_cleanup_delete_inode(inode, 1);
907 /* Lock down the inode. This gives us an up to date view of
908 * it's metadata (for verification), and allows us to
909 * serialize delete_inode votes.
911 * Even though we might be doing a truncate, we don't take the
912 * allocation lock here as it won't be needed - nobody will
913 * have the file open.
915 status = ocfs2_meta_lock(inode, &di_bh, 1);
917 if (status != -ENOENT)
919 ocfs2_cleanup_delete_inode(inode, 0);
923 /* Query the cluster. This will be the final decision made
924 * before we go ahead and wipe the inode. */
925 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
926 if (!wipe || status < 0) {
927 /* Error and inode busy vote both mean we won't be
928 * removing the inode, so they take almost the same
933 /* Someone in the cluster has voted to not wipe this
934 * inode, or it was never completely orphaned. Write
935 * out the pages and exit now. */
936 ocfs2_cleanup_delete_inode(inode, 1);
937 goto bail_unlock_inode;
940 ocfs2_cleanup_delete_inode(inode, 0);
942 status = ocfs2_wipe_inode(inode, di_bh);
944 if (status != -EDEADLK)
946 goto bail_unlock_inode;
950 * Mark the inode as successfully deleted.
952 * This is important for ocfs2_clear_inode() as it will check
953 * this flag and skip any checkpointing work
955 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
956 * the LVB for other nodes.
958 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
961 ocfs2_meta_unlock(inode, 1);
964 status = sigprocmask(SIG_SETMASK, &oldset, NULL);
972 void ocfs2_clear_inode(struct inode *inode)
975 struct ocfs2_inode_info *oi = OCFS2_I(inode);
982 mlog(0, "Clearing inode: %llu, nlink = %u\n",
983 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink);
985 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
986 "Inode=%lu\n", inode->i_ino);
988 /* For remove delete_inode vote, we hold open lock before,
989 * now it is time to unlock PR and EX open locks. */
990 ocfs2_open_unlock(inode);
992 /* Do these before all the other work so that we don't bounce
993 * the vote thread while waiting to destroy the locks. */
994 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
995 ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres);
996 ocfs2_mark_lockres_freeing(&oi->ip_data_lockres);
997 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
999 /* We very well may get a clear_inode before all an inodes
1000 * metadata has hit disk. Of course, we can't drop any cluster
1001 * locks until the journal has finished with it. The only
1002 * exception here are successfully wiped inodes - their
1003 * metadata can now be considered to be part of the system
1004 * inodes from which it came. */
1005 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1006 ocfs2_checkpoint_inode(inode);
1008 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1009 "Clear inode of %llu, inode has io markers\n",
1010 (unsigned long long)oi->ip_blkno);
1012 status = ocfs2_drop_inode_locks(inode);
1016 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1017 ocfs2_lock_res_free(&oi->ip_meta_lockres);
1018 ocfs2_lock_res_free(&oi->ip_data_lockres);
1019 ocfs2_lock_res_free(&oi->ip_open_lockres);
1021 ocfs2_metadata_cache_purge(inode);
1023 mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached,
1024 "Clear inode of %llu, inode has %u cache items\n",
1025 (unsigned long long)oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached);
1027 mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
1028 "Clear inode of %llu, inode has a bad flag\n",
1029 (unsigned long long)oi->ip_blkno);
1031 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1032 "Clear inode of %llu, inode is locked\n",
1033 (unsigned long long)oi->ip_blkno);
1035 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1036 "Clear inode of %llu, io_mutex is locked\n",
1037 (unsigned long long)oi->ip_blkno);
1038 mutex_unlock(&oi->ip_io_mutex);
1041 * down_trylock() returns 0, down_write_trylock() returns 1
1044 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1045 "Clear inode of %llu, alloc_sem is locked\n",
1046 (unsigned long long)oi->ip_blkno);
1047 up_write(&oi->ip_alloc_sem);
1049 mlog_bug_on_msg(oi->ip_open_count,
1050 "Clear inode of %llu has open count %d\n",
1051 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1053 /* Clear all other flags. */
1054 oi->ip_flags = OCFS2_INODE_CACHE_INLINE;
1055 oi->ip_created_trans = 0;
1056 oi->ip_last_trans = 0;
1057 oi->ip_dir_start_lookup = 0;
1058 oi->ip_blkno = 0ULL;
1064 /* Called under inode_lock, with no more references on the
1065 * struct inode, so it's safe here to check the flags field
1066 * and to manipulate i_nlink without any other locks. */
1067 void ocfs2_drop_inode(struct inode *inode)
1069 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1073 mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n",
1074 (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags);
1076 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1077 generic_delete_inode(inode);
1079 generic_drop_inode(inode);
1085 * TODO: this should probably be merged into ocfs2_get_block
1087 * However, you now need to pay attention to the cont_prepare_write()
1088 * stuff in ocfs2_get_block (that is, ocfs2_get_block pretty much
1089 * expects never to extend).
1091 struct buffer_head *ocfs2_bread(struct inode *inode,
1092 int block, int *err, int reada)
1094 struct buffer_head *bh = NULL;
1097 int readflags = OCFS2_BH_CACHED;
1100 readflags |= OCFS2_BH_READAHEAD;
1102 if (((u64)block << inode->i_sb->s_blocksize_bits) >=
1103 i_size_read(inode)) {
1108 tmperr = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL);
1114 tmperr = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, &bh,
1134 * This is called from our getattr.
1136 int ocfs2_inode_revalidate(struct dentry *dentry)
1138 struct inode *inode = dentry->d_inode;
1141 mlog_entry("(inode = 0x%p, ino = %llu)\n", inode,
1142 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL);
1145 mlog(0, "eep, no inode!\n");
1150 spin_lock(&OCFS2_I(inode)->ip_lock);
1151 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1152 spin_unlock(&OCFS2_I(inode)->ip_lock);
1153 mlog(0, "inode deleted!\n");
1157 spin_unlock(&OCFS2_I(inode)->ip_lock);
1159 /* Let ocfs2_meta_lock do the work of updating our struct
1161 status = ocfs2_meta_lock(inode, NULL, 0);
1163 if (status != -ENOENT)
1167 ocfs2_meta_unlock(inode, 0);
1175 * Updates a disk inode from a
1177 * Only takes ip_lock.
1179 int ocfs2_mark_inode_dirty(handle_t *handle,
1180 struct inode *inode,
1181 struct buffer_head *bh)
1184 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1186 mlog_entry("(inode %llu)\n",
1187 (unsigned long long)OCFS2_I(inode)->ip_blkno);
1189 status = ocfs2_journal_access(handle, inode, bh,
1190 OCFS2_JOURNAL_ACCESS_WRITE);
1196 spin_lock(&OCFS2_I(inode)->ip_lock);
1197 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1198 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1199 spin_unlock(&OCFS2_I(inode)->ip_lock);
1201 fe->i_size = cpu_to_le64(i_size_read(inode));
1202 fe->i_links_count = cpu_to_le16(inode->i_nlink);
1203 fe->i_uid = cpu_to_le32(inode->i_uid);
1204 fe->i_gid = cpu_to_le32(inode->i_gid);
1205 fe->i_mode = cpu_to_le16(inode->i_mode);
1206 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1207 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1208 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1209 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1210 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1211 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1213 status = ocfs2_journal_dirty(handle, bh);
1226 * Updates a struct inode from a disk inode.
1227 * does no i/o, only takes ip_lock.
1229 void ocfs2_refresh_inode(struct inode *inode,
1230 struct ocfs2_dinode *fe)
1232 spin_lock(&OCFS2_I(inode)->ip_lock);
1234 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1235 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1236 ocfs2_set_inode_flags(inode);
1237 i_size_write(inode, le64_to_cpu(fe->i_size));
1238 inode->i_nlink = le16_to_cpu(fe->i_links_count);
1239 inode->i_uid = le32_to_cpu(fe->i_uid);
1240 inode->i_gid = le32_to_cpu(fe->i_gid);
1241 inode->i_mode = le16_to_cpu(fe->i_mode);
1242 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1243 inode->i_blocks = 0;
1245 inode->i_blocks = ocfs2_align_bytes_to_sectors(i_size_read(inode));
1246 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1247 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1248 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1249 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1250 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1251 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1253 spin_unlock(&OCFS2_I(inode)->ip_lock);