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"
56 #include "refcounttree.h"
58 #include "buffer_head_io.h"
60 struct ocfs2_find_inode_args
64 unsigned int fi_flags;
65 unsigned int fi_sysfile_type;
68 static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
70 static int ocfs2_read_locked_inode(struct inode *inode,
71 struct ocfs2_find_inode_args *args);
72 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
73 static int ocfs2_find_actor(struct inode *inode, void *opaque);
74 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
76 struct buffer_head *fe_bh);
78 void ocfs2_set_inode_flags(struct inode *inode)
80 unsigned int flags = OCFS2_I(inode)->ip_attr;
82 inode->i_flags &= ~(S_IMMUTABLE |
83 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
85 if (flags & OCFS2_IMMUTABLE_FL)
86 inode->i_flags |= S_IMMUTABLE;
88 if (flags & OCFS2_SYNC_FL)
89 inode->i_flags |= S_SYNC;
90 if (flags & OCFS2_APPEND_FL)
91 inode->i_flags |= S_APPEND;
92 if (flags & OCFS2_NOATIME_FL)
93 inode->i_flags |= S_NOATIME;
94 if (flags & OCFS2_DIRSYNC_FL)
95 inode->i_flags |= S_DIRSYNC;
98 /* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
99 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
101 unsigned int flags = oi->vfs_inode.i_flags;
103 oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
104 OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
106 oi->ip_attr |= OCFS2_SYNC_FL;
107 if (flags & S_APPEND)
108 oi->ip_attr |= OCFS2_APPEND_FL;
109 if (flags & S_IMMUTABLE)
110 oi->ip_attr |= OCFS2_IMMUTABLE_FL;
111 if (flags & S_NOATIME)
112 oi->ip_attr |= OCFS2_NOATIME_FL;
113 if (flags & S_DIRSYNC)
114 oi->ip_attr |= OCFS2_DIRSYNC_FL;
117 struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno)
119 struct ocfs2_find_inode_args args;
121 args.fi_blkno = blkno;
123 args.fi_ino = ino_from_blkno(sb, blkno);
124 args.fi_sysfile_type = 0;
126 return ilookup5(sb, blkno, ocfs2_find_actor, &args);
128 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
131 struct inode *inode = NULL;
132 struct super_block *sb = osb->sb;
133 struct ocfs2_find_inode_args args;
135 mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno);
137 /* Ok. By now we've either got the offsets passed to us by the
138 * caller, or we just pulled them off the bh. Lets do some
139 * sanity checks to make sure they're OK. */
141 inode = ERR_PTR(-EINVAL);
142 mlog_errno(PTR_ERR(inode));
146 args.fi_blkno = blkno;
147 args.fi_flags = flags;
148 args.fi_ino = ino_from_blkno(sb, blkno);
149 args.fi_sysfile_type = sysfile_type;
151 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
152 ocfs2_init_locked_inode, &args);
153 /* inode was *not* in the inode cache. 2.6.x requires
154 * us to do our own read_inode call and unlock it
156 if (inode && inode->i_state & I_NEW) {
157 mlog(0, "Inode was not in inode cache, reading it.\n");
158 ocfs2_read_locked_inode(inode, &args);
159 unlock_new_inode(inode);
162 inode = ERR_PTR(-ENOMEM);
163 mlog_errno(PTR_ERR(inode));
166 if (is_bad_inode(inode)) {
168 inode = ERR_PTR(-ESTALE);
173 if (!IS_ERR(inode)) {
174 mlog(0, "returning inode with number %llu\n",
175 (unsigned long long)OCFS2_I(inode)->ip_blkno);
176 mlog_exit_ptr(inode);
184 * here's how inodes get read from disk:
185 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
186 * found? : return the in-memory inode
187 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
190 static int ocfs2_find_actor(struct inode *inode, void *opaque)
192 struct ocfs2_find_inode_args *args = NULL;
193 struct ocfs2_inode_info *oi = OCFS2_I(inode);
196 mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque);
200 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
202 if (oi->ip_blkno != args->fi_blkno)
212 * initialize the new inode, but don't do anything that would cause
214 * return 0 on success, 1 on failure
216 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
218 struct ocfs2_find_inode_args *args = opaque;
219 static struct lock_class_key ocfs2_quota_ip_alloc_sem_key,
220 ocfs2_file_ip_alloc_sem_key;
222 mlog_entry("inode = %p, opaque = %p\n", inode, opaque);
224 inode->i_ino = args->fi_ino;
225 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
226 if (args->fi_sysfile_type != 0)
227 lockdep_set_class(&inode->i_mutex,
228 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
229 if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE ||
230 args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE ||
231 args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE ||
232 args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE)
233 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
234 &ocfs2_quota_ip_alloc_sem_key);
236 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
237 &ocfs2_file_ip_alloc_sem_key);
243 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
246 struct super_block *sb;
247 struct ocfs2_super *osb;
250 mlog_entry("(0x%p, size:%llu)\n", inode,
251 (unsigned long long)le64_to_cpu(fe->i_size));
256 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
257 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
261 * These have all been checked by ocfs2_read_inode_block() or set
262 * by ocfs2_mknod_locked(), so a failure is a code bug.
264 BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode
265 cannot create a superblock
266 inode today. change if
268 BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
269 BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
272 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
273 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
274 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
276 inode->i_version = 1;
277 inode->i_generation = le32_to_cpu(fe->i_generation);
278 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
279 inode->i_mode = le16_to_cpu(fe->i_mode);
280 inode->i_uid = le32_to_cpu(fe->i_uid);
281 inode->i_gid = le32_to_cpu(fe->i_gid);
283 /* Fast symlinks will have i_size but no allocated clusters. */
284 if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
287 inode->i_blocks = ocfs2_inode_sector_count(inode);
288 inode->i_mapping->a_ops = &ocfs2_aops;
289 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
290 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
291 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
292 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
293 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
294 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
296 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
298 "ip_blkno %llu != i_blkno %llu!\n",
299 (unsigned long long)OCFS2_I(inode)->ip_blkno,
300 (unsigned long long)le64_to_cpu(fe->i_blkno));
302 inode->i_nlink = ocfs2_read_links_count(fe);
304 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
305 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
306 inode->i_flags |= S_NOQUOTA;
309 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
310 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
311 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
312 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
313 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
314 } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
315 inode->i_flags |= S_NOQUOTA;
316 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
317 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
318 /* we can't actually hit this as read_inode can't
319 * handle superblocks today ;-) */
323 switch (inode->i_mode & S_IFMT) {
326 inode->i_fop = &ocfs2_fops;
328 inode->i_fop = &ocfs2_fops_no_plocks;
329 inode->i_op = &ocfs2_file_iops;
330 i_size_write(inode, le64_to_cpu(fe->i_size));
333 inode->i_op = &ocfs2_dir_iops;
335 inode->i_fop = &ocfs2_dops;
337 inode->i_fop = &ocfs2_dops_no_plocks;
338 i_size_write(inode, le64_to_cpu(fe->i_size));
341 if (ocfs2_inode_is_fast_symlink(inode))
342 inode->i_op = &ocfs2_fast_symlink_inode_operations;
344 inode->i_op = &ocfs2_symlink_inode_operations;
345 i_size_write(inode, le64_to_cpu(fe->i_size));
348 inode->i_op = &ocfs2_special_file_iops;
349 init_special_inode(inode, inode->i_mode,
355 inode->i_ino = ino_from_blkno(inode->i_sb,
356 le64_to_cpu(fe->i_blkno));
359 * If we ever want to create system files from kernel,
360 * the generation argument to
361 * ocfs2_inode_lock_res_init() will have to change.
363 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
365 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
366 OCFS2_LOCK_TYPE_META, 0, inode);
368 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
369 OCFS2_LOCK_TYPE_OPEN, 0, inode);
372 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
373 OCFS2_LOCK_TYPE_RW, inode->i_generation,
376 ocfs2_set_inode_flags(inode);
378 OCFS2_I(inode)->ip_last_used_slot = 0;
379 OCFS2_I(inode)->ip_last_used_group = 0;
381 if (S_ISDIR(inode->i_mode))
382 ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
383 OCFS2_RESV_FLAG_DIR);
387 static int ocfs2_read_locked_inode(struct inode *inode,
388 struct ocfs2_find_inode_args *args)
390 struct super_block *sb;
391 struct ocfs2_super *osb;
392 struct ocfs2_dinode *fe;
393 struct buffer_head *bh = NULL;
394 int status, can_lock;
397 mlog_entry("(0x%p, 0x%p)\n", inode, args);
400 if (inode == NULL || inode->i_sb == NULL) {
401 mlog(ML_ERROR, "bad inode\n");
408 mlog(ML_ERROR, "bad inode args\n");
409 make_bad_inode(inode);
414 * To improve performance of cold-cache inode stats, we take
415 * the cluster lock here if possible.
417 * Generally, OCFS2 never trusts the contents of an inode
418 * unless it's holding a cluster lock, so taking it here isn't
419 * a correctness issue as much as it is a performance
422 * There are three times when taking the lock is not a good idea:
424 * 1) During startup, before we have initialized the DLM.
426 * 2) If we are reading certain system files which never get
427 * cluster locks (local alloc, truncate log).
429 * 3) If the process doing the iget() is responsible for
430 * orphan dir recovery. We're holding the orphan dir lock and
431 * can get into a deadlock with another process on another
432 * node in ->delete_inode().
434 * #1 and #2 can be simply solved by never taking the lock
435 * here for system files (which are the only type we read
436 * during mount). It's a heavier approach, but our main
437 * concern is user-accesible files anyway.
439 * #3 works itself out because we'll eventually take the
440 * cluster lock before trusting anything anyway.
442 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
443 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
444 && !ocfs2_mount_local(osb);
447 * To maintain backwards compatibility with older versions of
448 * ocfs2-tools, we still store the generation value for system
449 * files. The only ones that actually matter to userspace are
450 * the journals, but it's easier and inexpensive to just flag
451 * all system files similarly.
453 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
454 generation = osb->fs_generation;
456 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
457 OCFS2_LOCK_TYPE_META,
460 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
461 OCFS2_LOCK_TYPE_OPEN,
465 status = ocfs2_open_lock(inode);
467 make_bad_inode(inode);
471 status = ocfs2_inode_lock(inode, NULL, 0);
473 make_bad_inode(inode);
479 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
480 status = ocfs2_try_open_lock(inode, 0);
482 make_bad_inode(inode);
488 status = ocfs2_read_inode_block_full(inode, &bh,
489 OCFS2_BH_IGNORE_CACHE);
491 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
493 status = ocfs2_validate_inode_block(osb->sb, bh);
501 fe = (struct ocfs2_dinode *) bh->b_data;
504 * This is a code bug. Right now the caller needs to
505 * understand whether it is asking for a system file inode or
506 * not so the proper lock names can be built.
508 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
509 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
510 "Inode %llu: system file state is ambigous\n",
511 (unsigned long long)args->fi_blkno);
513 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
514 S_ISBLK(le16_to_cpu(fe->i_mode)))
515 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
517 ocfs2_populate_inode(inode, fe, 0);
519 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
525 ocfs2_inode_unlock(inode, 0);
528 make_bad_inode(inode);
537 void ocfs2_sync_blockdev(struct super_block *sb)
539 sync_blockdev(sb->s_bdev);
542 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
544 struct buffer_head *fe_bh)
547 struct ocfs2_truncate_context *tc = NULL;
548 struct ocfs2_dinode *fe;
549 handle_t *handle = NULL;
553 fe = (struct ocfs2_dinode *) fe_bh->b_data;
556 * This check will also skip truncate of inodes with inline
557 * data and fast symlinks.
559 if (fe->i_clusters) {
560 if (ocfs2_should_order_data(inode))
561 ocfs2_begin_ordered_truncate(inode, 0);
563 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
564 if (IS_ERR(handle)) {
565 status = PTR_ERR(handle);
570 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
572 OCFS2_JOURNAL_ACCESS_WRITE);
578 i_size_write(inode, 0);
580 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
586 ocfs2_commit_trans(osb, handle);
589 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
595 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
604 ocfs2_commit_trans(osb, handle);
609 static int ocfs2_remove_inode(struct inode *inode,
610 struct buffer_head *di_bh,
611 struct inode *orphan_dir_inode,
612 struct buffer_head *orphan_dir_bh)
615 struct inode *inode_alloc_inode = NULL;
616 struct buffer_head *inode_alloc_bh = NULL;
618 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
619 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
622 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
623 le16_to_cpu(di->i_suballoc_slot));
624 if (!inode_alloc_inode) {
630 mutex_lock(&inode_alloc_inode->i_mutex);
631 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
633 mutex_unlock(&inode_alloc_inode->i_mutex);
639 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
640 ocfs2_quota_trans_credits(inode->i_sb));
641 if (IS_ERR(handle)) {
642 status = PTR_ERR(handle);
647 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
654 /* set the inodes dtime */
655 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
656 OCFS2_JOURNAL_ACCESS_WRITE);
662 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
663 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
664 ocfs2_journal_dirty(handle, di_bh);
666 ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
667 dquot_free_inode(inode);
669 status = ocfs2_free_dinode(handle, inode_alloc_inode,
675 ocfs2_commit_trans(osb, handle);
677 ocfs2_inode_unlock(inode_alloc_inode, 1);
678 mutex_unlock(&inode_alloc_inode->i_mutex);
679 brelse(inode_alloc_bh);
681 iput(inode_alloc_inode);
687 * Serialize with orphan dir recovery. If the process doing
688 * recovery on this orphan dir does an iget() with the dir
689 * i_mutex held, we'll deadlock here. Instead we detect this
690 * and exit early - recovery will wipe this inode for us.
692 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
697 spin_lock(&osb->osb_lock);
698 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
699 mlog(0, "Recovery is happening on orphan dir %d, will skip "
700 "this inode\n", slot);
704 /* This signals to the orphan recovery process that it should
705 * wait for us to handle the wipe. */
706 osb->osb_orphan_wipes[slot]++;
708 spin_unlock(&osb->osb_lock);
712 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
715 spin_lock(&osb->osb_lock);
716 osb->osb_orphan_wipes[slot]--;
717 spin_unlock(&osb->osb_lock);
719 wake_up(&osb->osb_wipe_event);
722 static int ocfs2_wipe_inode(struct inode *inode,
723 struct buffer_head *di_bh)
725 int status, orphaned_slot;
726 struct inode *orphan_dir_inode = NULL;
727 struct buffer_head *orphan_dir_bh = NULL;
728 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
729 struct ocfs2_dinode *di;
731 di = (struct ocfs2_dinode *) di_bh->b_data;
732 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
734 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
738 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
739 ORPHAN_DIR_SYSTEM_INODE,
741 if (!orphan_dir_inode) {
747 /* Lock the orphan dir. The lock will be held for the entire
748 * delete_inode operation. We do this now to avoid races with
749 * recovery completion on other nodes. */
750 mutex_lock(&orphan_dir_inode->i_mutex);
751 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
753 mutex_unlock(&orphan_dir_inode->i_mutex);
759 /* we do this while holding the orphan dir lock because we
760 * don't want recovery being run from another node to try an
761 * inode delete underneath us -- this will result in two nodes
762 * truncating the same file! */
763 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
766 goto bail_unlock_dir;
769 /* Remove any dir index tree */
770 if (S_ISDIR(inode->i_mode)) {
771 status = ocfs2_dx_dir_truncate(inode, di_bh);
774 goto bail_unlock_dir;
778 /*Free extended attribute resources associated with this inode.*/
779 status = ocfs2_xattr_remove(inode, di_bh);
782 goto bail_unlock_dir;
785 status = ocfs2_remove_refcount_tree(inode, di_bh);
788 goto bail_unlock_dir;
791 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
797 ocfs2_inode_unlock(orphan_dir_inode, 1);
798 mutex_unlock(&orphan_dir_inode->i_mutex);
799 brelse(orphan_dir_bh);
801 iput(orphan_dir_inode);
802 ocfs2_signal_wipe_completion(osb, orphaned_slot);
807 /* There is a series of simple checks that should be done before a
808 * trylock is even considered. Encapsulate those in this function. */
809 static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
812 struct ocfs2_inode_info *oi = OCFS2_I(inode);
813 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
815 /* We shouldn't be getting here for the root directory
817 if (inode == osb->root_inode) {
818 mlog(ML_ERROR, "Skipping delete of root inode.\n");
822 /* If we're coming from downconvert_thread we can't go into our own
823 * voting [hello, deadlock city!], so unforuntately we just
824 * have to skip deleting this guy. That's OK though because
825 * the node who's doing the actual deleting should handle it
827 if (current == osb->dc_task) {
828 mlog(0, "Skipping delete of %lu because we're currently "
829 "in downconvert\n", inode->i_ino);
833 spin_lock(&oi->ip_lock);
834 /* OCFS2 *never* deletes system files. This should technically
835 * never get here as system file inodes should always have a
836 * positive link count. */
837 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
838 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
839 (unsigned long long)oi->ip_blkno);
843 /* If we have allowd wipe of this inode for another node, it
844 * will be marked here so we can safely skip it. Recovery will
845 * cleanup any inodes we might inadvertantly skip here. */
846 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
847 mlog(0, "Skipping delete of %lu because another node "
848 "has done this for us.\n", inode->i_ino);
854 spin_unlock(&oi->ip_lock);
859 /* Query the cluster to determine whether we should wipe an inode from
862 * Requires the inode to have the cluster lock. */
863 static int ocfs2_query_inode_wipe(struct inode *inode,
864 struct buffer_head *di_bh,
868 struct ocfs2_inode_info *oi = OCFS2_I(inode);
869 struct ocfs2_dinode *di;
873 /* While we were waiting for the cluster lock in
874 * ocfs2_delete_inode, another node might have asked to delete
875 * the inode. Recheck our flags to catch this. */
876 if (!ocfs2_inode_is_valid_to_delete(inode)) {
877 mlog(0, "Skipping delete of %llu because flags changed\n",
878 (unsigned long long)oi->ip_blkno);
882 /* Now that we have an up to date inode, we can double check
884 if (inode->i_nlink) {
885 mlog(0, "Skipping delete of %llu because nlink = %u\n",
886 (unsigned long long)oi->ip_blkno, inode->i_nlink);
890 /* Do some basic inode verification... */
891 di = (struct ocfs2_dinode *) di_bh->b_data;
892 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
893 /* for lack of a better error? */
896 "Inode %llu (on-disk %llu) not orphaned! "
897 "Disk flags 0x%x, inode flags 0x%x\n",
898 (unsigned long long)oi->ip_blkno,
899 (unsigned long long)le64_to_cpu(di->i_blkno),
900 le32_to_cpu(di->i_flags), oi->ip_flags);
904 /* has someone already deleted us?! baaad... */
912 * This is how ocfs2 determines whether an inode is still live
913 * within the cluster. Every node takes a shared read lock on
914 * the inode open lock in ocfs2_read_locked_inode(). When we
915 * get to ->delete_inode(), each node tries to convert it's
916 * lock to an exclusive. Trylocks are serialized by the inode
917 * meta data lock. If the upconvert suceeds, we know the inode
918 * is no longer live and can be deleted.
920 * Though we call this with the meta data lock held, the
921 * trylock keeps us from ABBA deadlock.
923 status = ocfs2_try_open_lock(inode, 1);
924 if (status == -EAGAIN) {
926 mlog(0, "Skipping delete of %llu because it is in use on "
927 "other nodes\n", (unsigned long long)oi->ip_blkno);
936 mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n",
937 (unsigned long long)oi->ip_blkno,
938 le16_to_cpu(di->i_orphaned_slot));
944 /* Support function for ocfs2_delete_inode. Will help us keep the
945 * inode data in a consistent state for clear_inode. Always truncates
946 * pages, optionally sync's them first. */
947 static void ocfs2_cleanup_delete_inode(struct inode *inode,
950 mlog(0, "Cleanup inode %llu, sync = %d\n",
951 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
953 write_inode_now(inode, 1);
954 truncate_inode_pages(&inode->i_data, 0);
957 void ocfs2_delete_inode(struct inode *inode)
960 sigset_t blocked, oldset;
961 struct buffer_head *di_bh = NULL;
963 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
965 /* When we fail in read_inode() we mark inode as bad. The second test
966 * catches the case when inode allocation fails before allocating
967 * a block for inode. */
968 if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno) {
969 mlog(0, "Skipping delete of bad inode\n");
973 dquot_initialize(inode);
975 if (!ocfs2_inode_is_valid_to_delete(inode)) {
976 /* It's probably not necessary to truncate_inode_pages
977 * here but we do it for safety anyway (it will most
978 * likely be a no-op anyway) */
979 ocfs2_cleanup_delete_inode(inode, 0);
983 /* We want to block signals in delete_inode as the lock and
984 * messaging paths may return us -ERESTARTSYS. Which would
985 * cause us to exit early, resulting in inodes being orphaned
987 sigfillset(&blocked);
988 status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
991 ocfs2_cleanup_delete_inode(inode, 1);
996 * Synchronize us against ocfs2_get_dentry. We take this in
997 * shared mode so that all nodes can still concurrently
1000 status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0);
1002 mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status);
1003 ocfs2_cleanup_delete_inode(inode, 0);
1006 /* Lock down the inode. This gives us an up to date view of
1007 * it's metadata (for verification), and allows us to
1008 * serialize delete_inode on multiple nodes.
1010 * Even though we might be doing a truncate, we don't take the
1011 * allocation lock here as it won't be needed - nobody will
1012 * have the file open.
1014 status = ocfs2_inode_lock(inode, &di_bh, 1);
1016 if (status != -ENOENT)
1018 ocfs2_cleanup_delete_inode(inode, 0);
1019 goto bail_unlock_nfs_sync;
1022 /* Query the cluster. This will be the final decision made
1023 * before we go ahead and wipe the inode. */
1024 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
1025 if (!wipe || status < 0) {
1026 /* Error and remote inode busy both mean we won't be
1027 * removing the inode, so they take almost the same
1032 /* Someone in the cluster has disallowed a wipe of
1033 * this inode, or it was never completely
1034 * orphaned. Write out the pages and exit now. */
1035 ocfs2_cleanup_delete_inode(inode, 1);
1036 goto bail_unlock_inode;
1039 ocfs2_cleanup_delete_inode(inode, 0);
1041 status = ocfs2_wipe_inode(inode, di_bh);
1043 if (status != -EDEADLK)
1045 goto bail_unlock_inode;
1049 * Mark the inode as successfully deleted.
1051 * This is important for ocfs2_clear_inode() as it will check
1052 * this flag and skip any checkpointing work
1054 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1055 * the LVB for other nodes.
1057 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
1060 ocfs2_inode_unlock(inode, 1);
1063 bail_unlock_nfs_sync:
1064 ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0);
1067 status = sigprocmask(SIG_SETMASK, &oldset, NULL);
1075 void ocfs2_clear_inode(struct inode *inode)
1078 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1085 mlog(0, "Clearing inode: %llu, nlink = %u\n",
1086 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink);
1088 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1089 "Inode=%lu\n", inode->i_ino);
1093 /* To preven remote deletes we hold open lock before, now it
1094 * is time to unlock PR and EX open locks. */
1095 ocfs2_open_unlock(inode);
1097 /* Do these before all the other work so that we don't bounce
1098 * the downconvert thread while waiting to destroy the locks. */
1099 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
1100 ocfs2_mark_lockres_freeing(&oi->ip_inode_lockres);
1101 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
1103 ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap,
1104 &oi->ip_la_data_resv);
1105 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1107 /* We very well may get a clear_inode before all an inodes
1108 * metadata has hit disk. Of course, we can't drop any cluster
1109 * locks until the journal has finished with it. The only
1110 * exception here are successfully wiped inodes - their
1111 * metadata can now be considered to be part of the system
1112 * inodes from which it came. */
1113 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1114 ocfs2_checkpoint_inode(inode);
1116 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1117 "Clear inode of %llu, inode has io markers\n",
1118 (unsigned long long)oi->ip_blkno);
1120 ocfs2_extent_map_trunc(inode, 0);
1122 status = ocfs2_drop_inode_locks(inode);
1126 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1127 ocfs2_lock_res_free(&oi->ip_inode_lockres);
1128 ocfs2_lock_res_free(&oi->ip_open_lockres);
1130 ocfs2_metadata_cache_exit(INODE_CACHE(inode));
1132 mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
1133 "Clear inode of %llu, inode has %u cache items\n",
1134 (unsigned long long)oi->ip_blkno,
1135 INODE_CACHE(inode)->ci_num_cached);
1137 mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE),
1138 "Clear inode of %llu, inode has a bad flag\n",
1139 (unsigned long long)oi->ip_blkno);
1141 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1142 "Clear inode of %llu, inode is locked\n",
1143 (unsigned long long)oi->ip_blkno);
1145 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1146 "Clear inode of %llu, io_mutex is locked\n",
1147 (unsigned long long)oi->ip_blkno);
1148 mutex_unlock(&oi->ip_io_mutex);
1151 * down_trylock() returns 0, down_write_trylock() returns 1
1154 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1155 "Clear inode of %llu, alloc_sem is locked\n",
1156 (unsigned long long)oi->ip_blkno);
1157 up_write(&oi->ip_alloc_sem);
1159 mlog_bug_on_msg(oi->ip_open_count,
1160 "Clear inode of %llu has open count %d\n",
1161 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1163 /* Clear all other flags. */
1165 oi->ip_dir_start_lookup = 0;
1166 oi->ip_blkno = 0ULL;
1169 * ip_jinode is used to track txns against this inode. We ensure that
1170 * the journal is flushed before journal shutdown. Thus it is safe to
1171 * have inodes get cleaned up after journal shutdown.
1173 jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
1180 /* Called under inode_lock, with no more references on the
1181 * struct inode, so it's safe here to check the flags field
1182 * and to manipulate i_nlink without any other locks. */
1183 void ocfs2_drop_inode(struct inode *inode)
1185 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1189 mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n",
1190 (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags);
1192 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1193 generic_delete_inode(inode);
1195 generic_drop_inode(inode);
1201 * This is called from our getattr.
1203 int ocfs2_inode_revalidate(struct dentry *dentry)
1205 struct inode *inode = dentry->d_inode;
1208 mlog_entry("(inode = 0x%p, ino = %llu)\n", inode,
1209 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL);
1212 mlog(0, "eep, no inode!\n");
1217 spin_lock(&OCFS2_I(inode)->ip_lock);
1218 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1219 spin_unlock(&OCFS2_I(inode)->ip_lock);
1220 mlog(0, "inode deleted!\n");
1224 spin_unlock(&OCFS2_I(inode)->ip_lock);
1226 /* Let ocfs2_inode_lock do the work of updating our struct
1228 status = ocfs2_inode_lock(inode, NULL, 0);
1230 if (status != -ENOENT)
1234 ocfs2_inode_unlock(inode, 0);
1242 * Updates a disk inode from a
1244 * Only takes ip_lock.
1246 int ocfs2_mark_inode_dirty(handle_t *handle,
1247 struct inode *inode,
1248 struct buffer_head *bh)
1251 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1253 mlog_entry("(inode %llu)\n",
1254 (unsigned long long)OCFS2_I(inode)->ip_blkno);
1256 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1257 OCFS2_JOURNAL_ACCESS_WRITE);
1263 spin_lock(&OCFS2_I(inode)->ip_lock);
1264 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1265 ocfs2_get_inode_flags(OCFS2_I(inode));
1266 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1267 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1268 spin_unlock(&OCFS2_I(inode)->ip_lock);
1270 fe->i_size = cpu_to_le64(i_size_read(inode));
1271 ocfs2_set_links_count(fe, inode->i_nlink);
1272 fe->i_uid = cpu_to_le32(inode->i_uid);
1273 fe->i_gid = cpu_to_le32(inode->i_gid);
1274 fe->i_mode = cpu_to_le16(inode->i_mode);
1275 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1276 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1277 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1278 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1279 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1280 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1282 ocfs2_journal_dirty(handle, bh);
1290 * Updates a struct inode from a disk inode.
1291 * does no i/o, only takes ip_lock.
1293 void ocfs2_refresh_inode(struct inode *inode,
1294 struct ocfs2_dinode *fe)
1296 spin_lock(&OCFS2_I(inode)->ip_lock);
1298 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1299 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1300 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1301 ocfs2_set_inode_flags(inode);
1302 i_size_write(inode, le64_to_cpu(fe->i_size));
1303 inode->i_nlink = ocfs2_read_links_count(fe);
1304 inode->i_uid = le32_to_cpu(fe->i_uid);
1305 inode->i_gid = le32_to_cpu(fe->i_gid);
1306 inode->i_mode = le16_to_cpu(fe->i_mode);
1307 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1308 inode->i_blocks = 0;
1310 inode->i_blocks = ocfs2_inode_sector_count(inode);
1311 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1312 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1313 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1314 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1315 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1316 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1318 spin_unlock(&OCFS2_I(inode)->ip_lock);
1321 int ocfs2_validate_inode_block(struct super_block *sb,
1322 struct buffer_head *bh)
1325 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1327 mlog(0, "Validating dinode %llu\n",
1328 (unsigned long long)bh->b_blocknr);
1330 BUG_ON(!buffer_uptodate(bh));
1333 * If the ecc fails, we return the error but otherwise
1334 * leave the filesystem running. We know any error is
1335 * local to this block.
1337 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1339 mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
1340 (unsigned long long)bh->b_blocknr);
1345 * Errors after here are fatal.
1350 if (!OCFS2_IS_VALID_DINODE(di)) {
1351 ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
1352 (unsigned long long)bh->b_blocknr, 7,
1357 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1358 ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
1359 (unsigned long long)bh->b_blocknr,
1360 (unsigned long long)le64_to_cpu(di->i_blkno));
1364 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1366 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
1367 (unsigned long long)bh->b_blocknr);
1371 if (le32_to_cpu(di->i_fs_generation) !=
1372 OCFS2_SB(sb)->fs_generation) {
1374 "Invalid dinode #%llu: fs_generation is %u\n",
1375 (unsigned long long)bh->b_blocknr,
1376 le32_to_cpu(di->i_fs_generation));
1386 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
1390 struct buffer_head *tmp = *bh;
1392 rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno,
1393 1, &tmp, flags, ocfs2_validate_inode_block);
1395 /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1402 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
1404 return ocfs2_read_inode_block_full(inode, bh, 0);
1408 static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci)
1410 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1412 return oi->ip_blkno;
1415 static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci)
1417 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1419 return oi->vfs_inode.i_sb;
1422 static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
1424 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1426 spin_lock(&oi->ip_lock);
1429 static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
1431 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1433 spin_unlock(&oi->ip_lock);
1436 static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci)
1438 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1440 mutex_lock(&oi->ip_io_mutex);
1443 static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci)
1445 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1447 mutex_unlock(&oi->ip_io_mutex);
1450 const struct ocfs2_caching_operations ocfs2_inode_caching_ops = {
1451 .co_owner = ocfs2_inode_cache_owner,
1452 .co_get_super = ocfs2_inode_cache_get_super,
1453 .co_cache_lock = ocfs2_inode_cache_lock,
1454 .co_cache_unlock = ocfs2_inode_cache_unlock,
1455 .co_io_lock = ocfs2_inode_cache_io_lock,
1456 .co_io_unlock = ocfs2_inode_cache_io_unlock,