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1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * inode.c
5 *
6 * vfs' aops, fops, dops and iops
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
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.
14 *
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.
19 *
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.
24 */
25
26#include <linux/fs.h>
27#include <linux/types.h>
28#include <linux/highmem.h>
29#include <linux/pagemap.h>
30#include <linux/quotaops.h>
31
32#include <asm/byteorder.h>
33
34#include <cluster/masklog.h>
35
36#include "ocfs2.h"
37
38#include "alloc.h"
39#include "dir.h"
40#include "blockcheck.h"
41#include "dlmglue.h"
42#include "extent_map.h"
43#include "file.h"
44#include "heartbeat.h"
45#include "inode.h"
46#include "journal.h"
47#include "namei.h"
48#include "suballoc.h"
49#include "super.h"
50#include "symlink.h"
51#include "sysfile.h"
52#include "uptodate.h"
53#include "xattr.h"
54#include "refcounttree.h"
55#include "ocfs2_trace.h"
56#include "filecheck.h"
57
58#include "buffer_head_io.h"
59
60struct ocfs2_find_inode_args
61{
62 u64 fi_blkno;
63 unsigned long fi_ino;
64 unsigned int fi_flags;
65 unsigned int fi_sysfile_type;
66};
67
68static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
69
70static int ocfs2_read_locked_inode(struct inode *inode,
71 struct ocfs2_find_inode_args *args);
72static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
73static int ocfs2_find_actor(struct inode *inode, void *opaque);
74static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
75 struct inode *inode,
76 struct buffer_head *fe_bh);
77
78static int ocfs2_filecheck_read_inode_block_full(struct inode *inode,
79 struct buffer_head **bh,
80 int flags, int type);
81static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
82 struct buffer_head *bh);
83static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
84 struct buffer_head *bh);
85
86void ocfs2_set_inode_flags(struct inode *inode)
87{
88 unsigned int flags = OCFS2_I(inode)->ip_attr;
89
90 inode->i_flags &= ~(S_IMMUTABLE |
91 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
92
93 if (flags & OCFS2_IMMUTABLE_FL)
94 inode->i_flags |= S_IMMUTABLE;
95
96 if (flags & OCFS2_SYNC_FL)
97 inode->i_flags |= S_SYNC;
98 if (flags & OCFS2_APPEND_FL)
99 inode->i_flags |= S_APPEND;
100 if (flags & OCFS2_NOATIME_FL)
101 inode->i_flags |= S_NOATIME;
102 if (flags & OCFS2_DIRSYNC_FL)
103 inode->i_flags |= S_DIRSYNC;
104}
105
106/* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
107void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
108{
109 unsigned int flags = oi->vfs_inode.i_flags;
110
111 oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
112 OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
113 if (flags & S_SYNC)
114 oi->ip_attr |= OCFS2_SYNC_FL;
115 if (flags & S_APPEND)
116 oi->ip_attr |= OCFS2_APPEND_FL;
117 if (flags & S_IMMUTABLE)
118 oi->ip_attr |= OCFS2_IMMUTABLE_FL;
119 if (flags & S_NOATIME)
120 oi->ip_attr |= OCFS2_NOATIME_FL;
121 if (flags & S_DIRSYNC)
122 oi->ip_attr |= OCFS2_DIRSYNC_FL;
123}
124
125struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno)
126{
127 struct ocfs2_find_inode_args args;
128
129 args.fi_blkno = blkno;
130 args.fi_flags = 0;
131 args.fi_ino = ino_from_blkno(sb, blkno);
132 args.fi_sysfile_type = 0;
133
134 return ilookup5(sb, blkno, ocfs2_find_actor, &args);
135}
136struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
137 int sysfile_type)
138{
139 int rc = 0;
140 struct inode *inode = NULL;
141 struct super_block *sb = osb->sb;
142 struct ocfs2_find_inode_args args;
143 journal_t *journal = OCFS2_SB(sb)->journal->j_journal;
144
145 trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
146 sysfile_type);
147
148 /* Ok. By now we've either got the offsets passed to us by the
149 * caller, or we just pulled them off the bh. Lets do some
150 * sanity checks to make sure they're OK. */
151 if (blkno == 0) {
152 inode = ERR_PTR(-EINVAL);
153 mlog_errno(PTR_ERR(inode));
154 goto bail;
155 }
156
157 args.fi_blkno = blkno;
158 args.fi_flags = flags;
159 args.fi_ino = ino_from_blkno(sb, blkno);
160 args.fi_sysfile_type = sysfile_type;
161
162 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
163 ocfs2_init_locked_inode, &args);
164 /* inode was *not* in the inode cache. 2.6.x requires
165 * us to do our own read_inode call and unlock it
166 * afterwards. */
167 if (inode == NULL) {
168 inode = ERR_PTR(-ENOMEM);
169 mlog_errno(PTR_ERR(inode));
170 goto bail;
171 }
172 trace_ocfs2_iget5_locked(inode->i_state);
173 if (inode->i_state & I_NEW) {
174 rc = ocfs2_read_locked_inode(inode, &args);
175 unlock_new_inode(inode);
176 }
177 if (is_bad_inode(inode)) {
178 iput(inode);
179 if ((flags & OCFS2_FI_FLAG_FILECHECK_CHK) ||
180 (flags & OCFS2_FI_FLAG_FILECHECK_FIX))
181 /* Return OCFS2_FILECHECK_ERR_XXX related errno */
182 inode = ERR_PTR(rc);
183 else
184 inode = ERR_PTR(-ESTALE);
185 goto bail;
186 }
187
188 /*
189 * Set transaction id's of transactions that have to be committed
190 * to finish f[data]sync. We set them to currently running transaction
191 * as we cannot be sure that the inode or some of its metadata isn't
192 * part of the transaction - the inode could have been reclaimed and
193 * now it is reread from disk.
194 */
195 if (journal) {
196 transaction_t *transaction;
197 tid_t tid;
198 struct ocfs2_inode_info *oi = OCFS2_I(inode);
199
200 read_lock(&journal->j_state_lock);
201 if (journal->j_running_transaction)
202 transaction = journal->j_running_transaction;
203 else
204 transaction = journal->j_committing_transaction;
205 if (transaction)
206 tid = transaction->t_tid;
207 else
208 tid = journal->j_commit_sequence;
209 read_unlock(&journal->j_state_lock);
210 oi->i_sync_tid = tid;
211 oi->i_datasync_tid = tid;
212 }
213
214bail:
215 if (!IS_ERR(inode)) {
216 trace_ocfs2_iget_end(inode,
217 (unsigned long long)OCFS2_I(inode)->ip_blkno);
218 }
219
220 return inode;
221}
222
223
224/*
225 * here's how inodes get read from disk:
226 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
227 * found? : return the in-memory inode
228 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
229 */
230
231static int ocfs2_find_actor(struct inode *inode, void *opaque)
232{
233 struct ocfs2_find_inode_args *args = NULL;
234 struct ocfs2_inode_info *oi = OCFS2_I(inode);
235 int ret = 0;
236
237 args = opaque;
238
239 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
240
241 trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno);
242
243 if (oi->ip_blkno != args->fi_blkno)
244 goto bail;
245
246 ret = 1;
247bail:
248 return ret;
249}
250
251/*
252 * initialize the new inode, but don't do anything that would cause
253 * us to sleep.
254 * return 0 on success, 1 on failure
255 */
256static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
257{
258 struct ocfs2_find_inode_args *args = opaque;
259 static struct lock_class_key ocfs2_quota_ip_alloc_sem_key,
260 ocfs2_file_ip_alloc_sem_key;
261
262 inode->i_ino = args->fi_ino;
263 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
264 if (args->fi_sysfile_type != 0)
265 lockdep_set_class(&inode->i_mutex,
266 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
267 if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE ||
268 args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE ||
269 args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE ||
270 args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE)
271 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
272 &ocfs2_quota_ip_alloc_sem_key);
273 else
274 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
275 &ocfs2_file_ip_alloc_sem_key);
276
277 return 0;
278}
279
280void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
281 int create_ino)
282{
283 struct super_block *sb;
284 struct ocfs2_super *osb;
285 int use_plocks = 1;
286
287 sb = inode->i_sb;
288 osb = OCFS2_SB(sb);
289
290 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
291 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
292 use_plocks = 0;
293
294 /*
295 * These have all been checked by ocfs2_read_inode_block() or set
296 * by ocfs2_mknod_locked(), so a failure is a code bug.
297 */
298 BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode
299 cannot create a superblock
300 inode today. change if
301 that is needed. */
302 BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
303 BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
304
305
306 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
307 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
308 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
309
310 inode->i_version = 1;
311 inode->i_generation = le32_to_cpu(fe->i_generation);
312 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
313 inode->i_mode = le16_to_cpu(fe->i_mode);
314 i_uid_write(inode, le32_to_cpu(fe->i_uid));
315 i_gid_write(inode, le32_to_cpu(fe->i_gid));
316
317 /* Fast symlinks will have i_size but no allocated clusters. */
318 if (S_ISLNK(inode->i_mode) && !fe->i_clusters) {
319 inode->i_blocks = 0;
320 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
321 } else {
322 inode->i_blocks = ocfs2_inode_sector_count(inode);
323 inode->i_mapping->a_ops = &ocfs2_aops;
324 }
325 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
326 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
327 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
328 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
329 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
330 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
331
332 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
333 mlog(ML_ERROR,
334 "ip_blkno %llu != i_blkno %llu!\n",
335 (unsigned long long)OCFS2_I(inode)->ip_blkno,
336 (unsigned long long)le64_to_cpu(fe->i_blkno));
337
338 set_nlink(inode, ocfs2_read_links_count(fe));
339
340 trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
341 le32_to_cpu(fe->i_flags));
342 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
343 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
344 inode->i_flags |= S_NOQUOTA;
345 }
346
347 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
348 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
349 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
350 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
351 } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
352 inode->i_flags |= S_NOQUOTA;
353 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
354 /* we can't actually hit this as read_inode can't
355 * handle superblocks today ;-) */
356 BUG();
357 }
358
359 switch (inode->i_mode & S_IFMT) {
360 case S_IFREG:
361 if (use_plocks)
362 inode->i_fop = &ocfs2_fops;
363 else
364 inode->i_fop = &ocfs2_fops_no_plocks;
365 inode->i_op = &ocfs2_file_iops;
366 i_size_write(inode, le64_to_cpu(fe->i_size));
367 break;
368 case S_IFDIR:
369 inode->i_op = &ocfs2_dir_iops;
370 if (use_plocks)
371 inode->i_fop = &ocfs2_dops;
372 else
373 inode->i_fop = &ocfs2_dops_no_plocks;
374 i_size_write(inode, le64_to_cpu(fe->i_size));
375 OCFS2_I(inode)->ip_dir_lock_gen = 1;
376 break;
377 case S_IFLNK:
378 inode->i_op = &ocfs2_symlink_inode_operations;
379 inode_nohighmem(inode);
380 i_size_write(inode, le64_to_cpu(fe->i_size));
381 break;
382 default:
383 inode->i_op = &ocfs2_special_file_iops;
384 init_special_inode(inode, inode->i_mode,
385 inode->i_rdev);
386 break;
387 }
388
389 if (create_ino) {
390 inode->i_ino = ino_from_blkno(inode->i_sb,
391 le64_to_cpu(fe->i_blkno));
392
393 /*
394 * If we ever want to create system files from kernel,
395 * the generation argument to
396 * ocfs2_inode_lock_res_init() will have to change.
397 */
398 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
399
400 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
401 OCFS2_LOCK_TYPE_META, 0, inode);
402
403 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
404 OCFS2_LOCK_TYPE_OPEN, 0, inode);
405 }
406
407 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
408 OCFS2_LOCK_TYPE_RW, inode->i_generation,
409 inode);
410
411 ocfs2_set_inode_flags(inode);
412
413 OCFS2_I(inode)->ip_last_used_slot = 0;
414 OCFS2_I(inode)->ip_last_used_group = 0;
415
416 if (S_ISDIR(inode->i_mode))
417 ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
418 OCFS2_RESV_FLAG_DIR);
419}
420
421static int ocfs2_read_locked_inode(struct inode *inode,
422 struct ocfs2_find_inode_args *args)
423{
424 struct super_block *sb;
425 struct ocfs2_super *osb;
426 struct ocfs2_dinode *fe;
427 struct buffer_head *bh = NULL;
428 int status, can_lock, lock_level = 0;
429 u32 generation = 0;
430
431 status = -EINVAL;
432 sb = inode->i_sb;
433 osb = OCFS2_SB(sb);
434
435 /*
436 * To improve performance of cold-cache inode stats, we take
437 * the cluster lock here if possible.
438 *
439 * Generally, OCFS2 never trusts the contents of an inode
440 * unless it's holding a cluster lock, so taking it here isn't
441 * a correctness issue as much as it is a performance
442 * improvement.
443 *
444 * There are three times when taking the lock is not a good idea:
445 *
446 * 1) During startup, before we have initialized the DLM.
447 *
448 * 2) If we are reading certain system files which never get
449 * cluster locks (local alloc, truncate log).
450 *
451 * 3) If the process doing the iget() is responsible for
452 * orphan dir recovery. We're holding the orphan dir lock and
453 * can get into a deadlock with another process on another
454 * node in ->delete_inode().
455 *
456 * #1 and #2 can be simply solved by never taking the lock
457 * here for system files (which are the only type we read
458 * during mount). It's a heavier approach, but our main
459 * concern is user-accessible files anyway.
460 *
461 * #3 works itself out because we'll eventually take the
462 * cluster lock before trusting anything anyway.
463 */
464 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
465 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
466 && !ocfs2_mount_local(osb);
467
468 trace_ocfs2_read_locked_inode(
469 (unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock);
470
471 /*
472 * To maintain backwards compatibility with older versions of
473 * ocfs2-tools, we still store the generation value for system
474 * files. The only ones that actually matter to userspace are
475 * the journals, but it's easier and inexpensive to just flag
476 * all system files similarly.
477 */
478 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
479 generation = osb->fs_generation;
480
481 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
482 OCFS2_LOCK_TYPE_META,
483 generation, inode);
484
485 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
486 OCFS2_LOCK_TYPE_OPEN,
487 0, inode);
488
489 if (can_lock) {
490 status = ocfs2_open_lock(inode);
491 if (status) {
492 make_bad_inode(inode);
493 mlog_errno(status);
494 return status;
495 }
496 status = ocfs2_inode_lock(inode, NULL, lock_level);
497 if (status) {
498 make_bad_inode(inode);
499 mlog_errno(status);
500 return status;
501 }
502 }
503
504 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
505 status = ocfs2_try_open_lock(inode, 0);
506 if (status) {
507 make_bad_inode(inode);
508 return status;
509 }
510 }
511
512 if (can_lock) {
513 if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
514 status = ocfs2_filecheck_read_inode_block_full(inode,
515 &bh, OCFS2_BH_IGNORE_CACHE, 0);
516 else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
517 status = ocfs2_filecheck_read_inode_block_full(inode,
518 &bh, OCFS2_BH_IGNORE_CACHE, 1);
519 else
520 status = ocfs2_read_inode_block_full(inode,
521 &bh, OCFS2_BH_IGNORE_CACHE);
522 } else {
523 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
524 /*
525 * If buffer is in jbd, then its checksum may not have been
526 * computed as yet.
527 */
528 if (!status && !buffer_jbd(bh)) {
529 if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
530 status = ocfs2_filecheck_validate_inode_block(
531 osb->sb, bh);
532 else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
533 status = ocfs2_filecheck_repair_inode_block(
534 osb->sb, bh);
535 else
536 status = ocfs2_validate_inode_block(
537 osb->sb, bh);
538 }
539 }
540 if (status < 0) {
541 mlog_errno(status);
542 goto bail;
543 }
544
545 status = -EINVAL;
546 fe = (struct ocfs2_dinode *) bh->b_data;
547
548 /*
549 * This is a code bug. Right now the caller needs to
550 * understand whether it is asking for a system file inode or
551 * not so the proper lock names can be built.
552 */
553 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
554 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
555 "Inode %llu: system file state is ambigous\n",
556 (unsigned long long)args->fi_blkno);
557
558 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
559 S_ISBLK(le16_to_cpu(fe->i_mode)))
560 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
561
562 ocfs2_populate_inode(inode, fe, 0);
563
564 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
565
566 if (buffer_dirty(bh) && !buffer_jbd(bh)) {
567 if (can_lock) {
568 ocfs2_inode_unlock(inode, lock_level);
569 lock_level = 1;
570 ocfs2_inode_lock(inode, NULL, lock_level);
571 }
572 status = ocfs2_write_block(osb, bh, INODE_CACHE(inode));
573 if (status < 0) {
574 mlog_errno(status);
575 goto bail;
576 }
577 }
578
579 status = 0;
580
581bail:
582 if (can_lock)
583 ocfs2_inode_unlock(inode, lock_level);
584
585 if (status < 0)
586 make_bad_inode(inode);
587
588 brelse(bh);
589
590 return status;
591}
592
593void ocfs2_sync_blockdev(struct super_block *sb)
594{
595 sync_blockdev(sb->s_bdev);
596}
597
598static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
599 struct inode *inode,
600 struct buffer_head *fe_bh)
601{
602 int status = 0;
603 struct ocfs2_dinode *fe;
604 handle_t *handle = NULL;
605
606 fe = (struct ocfs2_dinode *) fe_bh->b_data;
607
608 /*
609 * This check will also skip truncate of inodes with inline
610 * data and fast symlinks.
611 */
612 if (fe->i_clusters) {
613 if (ocfs2_should_order_data(inode))
614 ocfs2_begin_ordered_truncate(inode, 0);
615
616 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
617 if (IS_ERR(handle)) {
618 status = PTR_ERR(handle);
619 handle = NULL;
620 mlog_errno(status);
621 goto out;
622 }
623
624 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
625 fe_bh,
626 OCFS2_JOURNAL_ACCESS_WRITE);
627 if (status < 0) {
628 mlog_errno(status);
629 goto out;
630 }
631
632 i_size_write(inode, 0);
633
634 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
635 if (status < 0) {
636 mlog_errno(status);
637 goto out;
638 }
639
640 ocfs2_commit_trans(osb, handle);
641 handle = NULL;
642
643 status = ocfs2_commit_truncate(osb, inode, fe_bh);
644 if (status < 0) {
645 mlog_errno(status);
646 goto out;
647 }
648 }
649
650out:
651 if (handle)
652 ocfs2_commit_trans(osb, handle);
653 return status;
654}
655
656static int ocfs2_remove_inode(struct inode *inode,
657 struct buffer_head *di_bh,
658 struct inode *orphan_dir_inode,
659 struct buffer_head *orphan_dir_bh)
660{
661 int status;
662 struct inode *inode_alloc_inode = NULL;
663 struct buffer_head *inode_alloc_bh = NULL;
664 handle_t *handle;
665 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
666 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
667
668 inode_alloc_inode =
669 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
670 le16_to_cpu(di->i_suballoc_slot));
671 if (!inode_alloc_inode) {
672 status = -ENOENT;
673 mlog_errno(status);
674 goto bail;
675 }
676
677 inode_lock(inode_alloc_inode);
678 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
679 if (status < 0) {
680 inode_unlock(inode_alloc_inode);
681
682 mlog_errno(status);
683 goto bail;
684 }
685
686 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
687 ocfs2_quota_trans_credits(inode->i_sb));
688 if (IS_ERR(handle)) {
689 status = PTR_ERR(handle);
690 mlog_errno(status);
691 goto bail_unlock;
692 }
693
694 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
695 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
696 orphan_dir_bh, false);
697 if (status < 0) {
698 mlog_errno(status);
699 goto bail_commit;
700 }
701 }
702
703 /* set the inodes dtime */
704 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
705 OCFS2_JOURNAL_ACCESS_WRITE);
706 if (status < 0) {
707 mlog_errno(status);
708 goto bail_commit;
709 }
710
711 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
712 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
713 ocfs2_journal_dirty(handle, di_bh);
714
715 ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
716 dquot_free_inode(inode);
717
718 status = ocfs2_free_dinode(handle, inode_alloc_inode,
719 inode_alloc_bh, di);
720 if (status < 0)
721 mlog_errno(status);
722
723bail_commit:
724 ocfs2_commit_trans(osb, handle);
725bail_unlock:
726 ocfs2_inode_unlock(inode_alloc_inode, 1);
727 inode_unlock(inode_alloc_inode);
728 brelse(inode_alloc_bh);
729bail:
730 iput(inode_alloc_inode);
731
732 return status;
733}
734
735/*
736 * Serialize with orphan dir recovery. If the process doing
737 * recovery on this orphan dir does an iget() with the dir
738 * i_mutex held, we'll deadlock here. Instead we detect this
739 * and exit early - recovery will wipe this inode for us.
740 */
741static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
742 int slot)
743{
744 int ret = 0;
745
746 spin_lock(&osb->osb_lock);
747 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
748 ret = -EDEADLK;
749 goto out;
750 }
751 /* This signals to the orphan recovery process that it should
752 * wait for us to handle the wipe. */
753 osb->osb_orphan_wipes[slot]++;
754out:
755 spin_unlock(&osb->osb_lock);
756 trace_ocfs2_check_orphan_recovery_state(slot, ret);
757 return ret;
758}
759
760static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
761 int slot)
762{
763 spin_lock(&osb->osb_lock);
764 osb->osb_orphan_wipes[slot]--;
765 spin_unlock(&osb->osb_lock);
766
767 wake_up(&osb->osb_wipe_event);
768}
769
770static int ocfs2_wipe_inode(struct inode *inode,
771 struct buffer_head *di_bh)
772{
773 int status, orphaned_slot = -1;
774 struct inode *orphan_dir_inode = NULL;
775 struct buffer_head *orphan_dir_bh = NULL;
776 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
777 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
778
779 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
780 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
781
782 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
783 if (status)
784 return status;
785
786 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
787 ORPHAN_DIR_SYSTEM_INODE,
788 orphaned_slot);
789 if (!orphan_dir_inode) {
790 status = -ENOENT;
791 mlog_errno(status);
792 goto bail;
793 }
794
795 /* Lock the orphan dir. The lock will be held for the entire
796 * delete_inode operation. We do this now to avoid races with
797 * recovery completion on other nodes. */
798 inode_lock(orphan_dir_inode);
799 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
800 if (status < 0) {
801 inode_unlock(orphan_dir_inode);
802
803 mlog_errno(status);
804 goto bail;
805 }
806 }
807
808 /* we do this while holding the orphan dir lock because we
809 * don't want recovery being run from another node to try an
810 * inode delete underneath us -- this will result in two nodes
811 * truncating the same file! */
812 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
813 if (status < 0) {
814 mlog_errno(status);
815 goto bail_unlock_dir;
816 }
817
818 /* Remove any dir index tree */
819 if (S_ISDIR(inode->i_mode)) {
820 status = ocfs2_dx_dir_truncate(inode, di_bh);
821 if (status) {
822 mlog_errno(status);
823 goto bail_unlock_dir;
824 }
825 }
826
827 /*Free extended attribute resources associated with this inode.*/
828 status = ocfs2_xattr_remove(inode, di_bh);
829 if (status < 0) {
830 mlog_errno(status);
831 goto bail_unlock_dir;
832 }
833
834 status = ocfs2_remove_refcount_tree(inode, di_bh);
835 if (status < 0) {
836 mlog_errno(status);
837 goto bail_unlock_dir;
838 }
839
840 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
841 orphan_dir_bh);
842 if (status < 0)
843 mlog_errno(status);
844
845bail_unlock_dir:
846 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)
847 return status;
848
849 ocfs2_inode_unlock(orphan_dir_inode, 1);
850 inode_unlock(orphan_dir_inode);
851 brelse(orphan_dir_bh);
852bail:
853 iput(orphan_dir_inode);
854 ocfs2_signal_wipe_completion(osb, orphaned_slot);
855
856 return status;
857}
858
859/* There is a series of simple checks that should be done before a
860 * trylock is even considered. Encapsulate those in this function. */
861static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
862{
863 int ret = 0;
864 struct ocfs2_inode_info *oi = OCFS2_I(inode);
865 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
866
867 trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task,
868 (unsigned long long)oi->ip_blkno,
869 oi->ip_flags);
870
871 /* We shouldn't be getting here for the root directory
872 * inode.. */
873 if (inode == osb->root_inode) {
874 mlog(ML_ERROR, "Skipping delete of root inode.\n");
875 goto bail;
876 }
877
878 /*
879 * If we're coming from downconvert_thread we can't go into our own
880 * voting [hello, deadlock city!] so we cannot delete the inode. But
881 * since we dropped last inode ref when downconverting dentry lock,
882 * we cannot have the file open and thus the node doing unlink will
883 * take care of deleting the inode.
884 */
885 if (current == osb->dc_task)
886 goto bail;
887
888 spin_lock(&oi->ip_lock);
889 /* OCFS2 *never* deletes system files. This should technically
890 * never get here as system file inodes should always have a
891 * positive link count. */
892 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
893 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
894 (unsigned long long)oi->ip_blkno);
895 goto bail_unlock;
896 }
897
898 ret = 1;
899bail_unlock:
900 spin_unlock(&oi->ip_lock);
901bail:
902 return ret;
903}
904
905/* Query the cluster to determine whether we should wipe an inode from
906 * disk or not.
907 *
908 * Requires the inode to have the cluster lock. */
909static int ocfs2_query_inode_wipe(struct inode *inode,
910 struct buffer_head *di_bh,
911 int *wipe)
912{
913 int status = 0, reason = 0;
914 struct ocfs2_inode_info *oi = OCFS2_I(inode);
915 struct ocfs2_dinode *di;
916
917 *wipe = 0;
918
919 trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno,
920 inode->i_nlink);
921
922 /* While we were waiting for the cluster lock in
923 * ocfs2_delete_inode, another node might have asked to delete
924 * the inode. Recheck our flags to catch this. */
925 if (!ocfs2_inode_is_valid_to_delete(inode)) {
926 reason = 1;
927 goto bail;
928 }
929
930 /* Now that we have an up to date inode, we can double check
931 * the link count. */
932 if (inode->i_nlink)
933 goto bail;
934
935 /* Do some basic inode verification... */
936 di = (struct ocfs2_dinode *) di_bh->b_data;
937 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) &&
938 !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
939 /*
940 * Inodes in the orphan dir must have ORPHANED_FL. The only
941 * inodes that come back out of the orphan dir are reflink
942 * targets. A reflink target may be moved out of the orphan
943 * dir between the time we scan the directory and the time we
944 * process it. This would lead to HAS_REFCOUNT_FL being set but
945 * ORPHANED_FL not.
946 */
947 if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) {
948 reason = 2;
949 goto bail;
950 }
951
952 /* for lack of a better error? */
953 status = -EEXIST;
954 mlog(ML_ERROR,
955 "Inode %llu (on-disk %llu) not orphaned! "
956 "Disk flags 0x%x, inode flags 0x%x\n",
957 (unsigned long long)oi->ip_blkno,
958 (unsigned long long)le64_to_cpu(di->i_blkno),
959 le32_to_cpu(di->i_flags), oi->ip_flags);
960 goto bail;
961 }
962
963 /* has someone already deleted us?! baaad... */
964 if (di->i_dtime) {
965 status = -EEXIST;
966 mlog_errno(status);
967 goto bail;
968 }
969
970 /*
971 * This is how ocfs2 determines whether an inode is still live
972 * within the cluster. Every node takes a shared read lock on
973 * the inode open lock in ocfs2_read_locked_inode(). When we
974 * get to ->delete_inode(), each node tries to convert it's
975 * lock to an exclusive. Trylocks are serialized by the inode
976 * meta data lock. If the upconvert succeeds, we know the inode
977 * is no longer live and can be deleted.
978 *
979 * Though we call this with the meta data lock held, the
980 * trylock keeps us from ABBA deadlock.
981 */
982 status = ocfs2_try_open_lock(inode, 1);
983 if (status == -EAGAIN) {
984 status = 0;
985 reason = 3;
986 goto bail;
987 }
988 if (status < 0) {
989 mlog_errno(status);
990 goto bail;
991 }
992
993 *wipe = 1;
994 trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot));
995
996bail:
997 trace_ocfs2_query_inode_wipe_end(status, reason);
998 return status;
999}
1000
1001/* Support function for ocfs2_delete_inode. Will help us keep the
1002 * inode data in a consistent state for clear_inode. Always truncates
1003 * pages, optionally sync's them first. */
1004static void ocfs2_cleanup_delete_inode(struct inode *inode,
1005 int sync_data)
1006{
1007 trace_ocfs2_cleanup_delete_inode(
1008 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
1009 if (sync_data)
1010 filemap_write_and_wait(inode->i_mapping);
1011 truncate_inode_pages_final(&inode->i_data);
1012}
1013
1014static void ocfs2_delete_inode(struct inode *inode)
1015{
1016 int wipe, status;
1017 sigset_t oldset;
1018 struct buffer_head *di_bh = NULL;
1019 struct ocfs2_dinode *di = NULL;
1020
1021 trace_ocfs2_delete_inode(inode->i_ino,
1022 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1023 is_bad_inode(inode));
1024
1025 /* When we fail in read_inode() we mark inode as bad. The second test
1026 * catches the case when inode allocation fails before allocating
1027 * a block for inode. */
1028 if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno)
1029 goto bail;
1030
1031 if (!ocfs2_inode_is_valid_to_delete(inode)) {
1032 /* It's probably not necessary to truncate_inode_pages
1033 * here but we do it for safety anyway (it will most
1034 * likely be a no-op anyway) */
1035 ocfs2_cleanup_delete_inode(inode, 0);
1036 goto bail;
1037 }
1038
1039 dquot_initialize(inode);
1040
1041 /* We want to block signals in delete_inode as the lock and
1042 * messaging paths may return us -ERESTARTSYS. Which would
1043 * cause us to exit early, resulting in inodes being orphaned
1044 * forever. */
1045 ocfs2_block_signals(&oldset);
1046
1047 /*
1048 * Synchronize us against ocfs2_get_dentry. We take this in
1049 * shared mode so that all nodes can still concurrently
1050 * process deletes.
1051 */
1052 status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0);
1053 if (status < 0) {
1054 mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status);
1055 ocfs2_cleanup_delete_inode(inode, 0);
1056 goto bail_unblock;
1057 }
1058 /* Lock down the inode. This gives us an up to date view of
1059 * it's metadata (for verification), and allows us to
1060 * serialize delete_inode on multiple nodes.
1061 *
1062 * Even though we might be doing a truncate, we don't take the
1063 * allocation lock here as it won't be needed - nobody will
1064 * have the file open.
1065 */
1066 status = ocfs2_inode_lock(inode, &di_bh, 1);
1067 if (status < 0) {
1068 if (status != -ENOENT)
1069 mlog_errno(status);
1070 ocfs2_cleanup_delete_inode(inode, 0);
1071 goto bail_unlock_nfs_sync;
1072 }
1073
1074 di = (struct ocfs2_dinode *)di_bh->b_data;
1075 /* Skip inode deletion and wait for dio orphan entry recovered
1076 * first */
1077 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
1078 ocfs2_cleanup_delete_inode(inode, 0);
1079 goto bail_unlock_inode;
1080 }
1081
1082 /* Query the cluster. This will be the final decision made
1083 * before we go ahead and wipe the inode. */
1084 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
1085 if (!wipe || status < 0) {
1086 /* Error and remote inode busy both mean we won't be
1087 * removing the inode, so they take almost the same
1088 * path. */
1089 if (status < 0)
1090 mlog_errno(status);
1091
1092 /* Someone in the cluster has disallowed a wipe of
1093 * this inode, or it was never completely
1094 * orphaned. Write out the pages and exit now. */
1095 ocfs2_cleanup_delete_inode(inode, 1);
1096 goto bail_unlock_inode;
1097 }
1098
1099 ocfs2_cleanup_delete_inode(inode, 0);
1100
1101 status = ocfs2_wipe_inode(inode, di_bh);
1102 if (status < 0) {
1103 if (status != -EDEADLK)
1104 mlog_errno(status);
1105 goto bail_unlock_inode;
1106 }
1107
1108 /*
1109 * Mark the inode as successfully deleted.
1110 *
1111 * This is important for ocfs2_clear_inode() as it will check
1112 * this flag and skip any checkpointing work
1113 *
1114 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1115 * the LVB for other nodes.
1116 */
1117 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
1118
1119bail_unlock_inode:
1120 ocfs2_inode_unlock(inode, 1);
1121 brelse(di_bh);
1122
1123bail_unlock_nfs_sync:
1124 ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0);
1125
1126bail_unblock:
1127 ocfs2_unblock_signals(&oldset);
1128bail:
1129 return;
1130}
1131
1132static void ocfs2_clear_inode(struct inode *inode)
1133{
1134 int status;
1135 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1136 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1137
1138 clear_inode(inode);
1139 trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno,
1140 inode->i_nlink);
1141
1142 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1143 "Inode=%lu\n", inode->i_ino);
1144
1145 dquot_drop(inode);
1146
1147 /* To preven remote deletes we hold open lock before, now it
1148 * is time to unlock PR and EX open locks. */
1149 ocfs2_open_unlock(inode);
1150
1151 /* Do these before all the other work so that we don't bounce
1152 * the downconvert thread while waiting to destroy the locks. */
1153 ocfs2_mark_lockres_freeing(osb, &oi->ip_rw_lockres);
1154 ocfs2_mark_lockres_freeing(osb, &oi->ip_inode_lockres);
1155 ocfs2_mark_lockres_freeing(osb, &oi->ip_open_lockres);
1156
1157 ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap,
1158 &oi->ip_la_data_resv);
1159 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1160
1161 /* We very well may get a clear_inode before all an inodes
1162 * metadata has hit disk. Of course, we can't drop any cluster
1163 * locks until the journal has finished with it. The only
1164 * exception here are successfully wiped inodes - their
1165 * metadata can now be considered to be part of the system
1166 * inodes from which it came. */
1167 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1168 ocfs2_checkpoint_inode(inode);
1169
1170 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1171 "Clear inode of %llu, inode has io markers\n",
1172 (unsigned long long)oi->ip_blkno);
1173 mlog_bug_on_msg(!list_empty(&oi->ip_unwritten_list),
1174 "Clear inode of %llu, inode has unwritten extents\n",
1175 (unsigned long long)oi->ip_blkno);
1176
1177 ocfs2_extent_map_trunc(inode, 0);
1178
1179 status = ocfs2_drop_inode_locks(inode);
1180 if (status < 0)
1181 mlog_errno(status);
1182
1183 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1184 ocfs2_lock_res_free(&oi->ip_inode_lockres);
1185 ocfs2_lock_res_free(&oi->ip_open_lockres);
1186
1187 ocfs2_metadata_cache_exit(INODE_CACHE(inode));
1188
1189 mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
1190 "Clear inode of %llu, inode has %u cache items\n",
1191 (unsigned long long)oi->ip_blkno,
1192 INODE_CACHE(inode)->ci_num_cached);
1193
1194 mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE),
1195 "Clear inode of %llu, inode has a bad flag\n",
1196 (unsigned long long)oi->ip_blkno);
1197
1198 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1199 "Clear inode of %llu, inode is locked\n",
1200 (unsigned long long)oi->ip_blkno);
1201
1202 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1203 "Clear inode of %llu, io_mutex is locked\n",
1204 (unsigned long long)oi->ip_blkno);
1205 mutex_unlock(&oi->ip_io_mutex);
1206
1207 /*
1208 * down_trylock() returns 0, down_write_trylock() returns 1
1209 * kernel 1, world 0
1210 */
1211 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1212 "Clear inode of %llu, alloc_sem is locked\n",
1213 (unsigned long long)oi->ip_blkno);
1214 up_write(&oi->ip_alloc_sem);
1215
1216 mlog_bug_on_msg(oi->ip_open_count,
1217 "Clear inode of %llu has open count %d\n",
1218 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1219
1220 /* Clear all other flags. */
1221 oi->ip_flags = 0;
1222 oi->ip_dir_start_lookup = 0;
1223 oi->ip_blkno = 0ULL;
1224
1225 /*
1226 * ip_jinode is used to track txns against this inode. We ensure that
1227 * the journal is flushed before journal shutdown. Thus it is safe to
1228 * have inodes get cleaned up after journal shutdown.
1229 */
1230 jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
1231 &oi->ip_jinode);
1232}
1233
1234void ocfs2_evict_inode(struct inode *inode)
1235{
1236 if (!inode->i_nlink ||
1237 (OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) {
1238 ocfs2_delete_inode(inode);
1239 } else {
1240 truncate_inode_pages_final(&inode->i_data);
1241 }
1242 ocfs2_clear_inode(inode);
1243}
1244
1245/* Called under inode_lock, with no more references on the
1246 * struct inode, so it's safe here to check the flags field
1247 * and to manipulate i_nlink without any other locks. */
1248int ocfs2_drop_inode(struct inode *inode)
1249{
1250 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1251
1252 trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno,
1253 inode->i_nlink, oi->ip_flags);
1254
1255 assert_spin_locked(&inode->i_lock);
1256 inode->i_state |= I_WILL_FREE;
1257 spin_unlock(&inode->i_lock);
1258 write_inode_now(inode, 1);
1259 spin_lock(&inode->i_lock);
1260 WARN_ON(inode->i_state & I_NEW);
1261 inode->i_state &= ~I_WILL_FREE;
1262
1263 return 1;
1264}
1265
1266/*
1267 * This is called from our getattr.
1268 */
1269int ocfs2_inode_revalidate(struct dentry *dentry)
1270{
1271 struct inode *inode = d_inode(dentry);
1272 int status = 0;
1273
1274 trace_ocfs2_inode_revalidate(inode,
1275 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL,
1276 inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0);
1277
1278 if (!inode) {
1279 status = -ENOENT;
1280 goto bail;
1281 }
1282
1283 spin_lock(&OCFS2_I(inode)->ip_lock);
1284 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1285 spin_unlock(&OCFS2_I(inode)->ip_lock);
1286 status = -ENOENT;
1287 goto bail;
1288 }
1289 spin_unlock(&OCFS2_I(inode)->ip_lock);
1290
1291 /* Let ocfs2_inode_lock do the work of updating our struct
1292 * inode for us. */
1293 status = ocfs2_inode_lock(inode, NULL, 0);
1294 if (status < 0) {
1295 if (status != -ENOENT)
1296 mlog_errno(status);
1297 goto bail;
1298 }
1299 ocfs2_inode_unlock(inode, 0);
1300bail:
1301 return status;
1302}
1303
1304/*
1305 * Updates a disk inode from a
1306 * struct inode.
1307 * Only takes ip_lock.
1308 */
1309int ocfs2_mark_inode_dirty(handle_t *handle,
1310 struct inode *inode,
1311 struct buffer_head *bh)
1312{
1313 int status;
1314 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1315
1316 trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno);
1317
1318 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1319 OCFS2_JOURNAL_ACCESS_WRITE);
1320 if (status < 0) {
1321 mlog_errno(status);
1322 goto leave;
1323 }
1324
1325 spin_lock(&OCFS2_I(inode)->ip_lock);
1326 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1327 ocfs2_get_inode_flags(OCFS2_I(inode));
1328 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1329 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1330 spin_unlock(&OCFS2_I(inode)->ip_lock);
1331
1332 fe->i_size = cpu_to_le64(i_size_read(inode));
1333 ocfs2_set_links_count(fe, inode->i_nlink);
1334 fe->i_uid = cpu_to_le32(i_uid_read(inode));
1335 fe->i_gid = cpu_to_le32(i_gid_read(inode));
1336 fe->i_mode = cpu_to_le16(inode->i_mode);
1337 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1338 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1339 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1340 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1341 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1342 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1343
1344 ocfs2_journal_dirty(handle, bh);
1345 ocfs2_update_inode_fsync_trans(handle, inode, 1);
1346leave:
1347 return status;
1348}
1349
1350/*
1351 *
1352 * Updates a struct inode from a disk inode.
1353 * does no i/o, only takes ip_lock.
1354 */
1355void ocfs2_refresh_inode(struct inode *inode,
1356 struct ocfs2_dinode *fe)
1357{
1358 spin_lock(&OCFS2_I(inode)->ip_lock);
1359
1360 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1361 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1362 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1363 ocfs2_set_inode_flags(inode);
1364 i_size_write(inode, le64_to_cpu(fe->i_size));
1365 set_nlink(inode, ocfs2_read_links_count(fe));
1366 i_uid_write(inode, le32_to_cpu(fe->i_uid));
1367 i_gid_write(inode, le32_to_cpu(fe->i_gid));
1368 inode->i_mode = le16_to_cpu(fe->i_mode);
1369 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1370 inode->i_blocks = 0;
1371 else
1372 inode->i_blocks = ocfs2_inode_sector_count(inode);
1373 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1374 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1375 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1376 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1377 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1378 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1379
1380 spin_unlock(&OCFS2_I(inode)->ip_lock);
1381}
1382
1383int ocfs2_validate_inode_block(struct super_block *sb,
1384 struct buffer_head *bh)
1385{
1386 int rc;
1387 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1388
1389 trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr);
1390
1391 BUG_ON(!buffer_uptodate(bh));
1392
1393 /*
1394 * If the ecc fails, we return the error but otherwise
1395 * leave the filesystem running. We know any error is
1396 * local to this block.
1397 */
1398 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1399 if (rc) {
1400 mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
1401 (unsigned long long)bh->b_blocknr);
1402 goto bail;
1403 }
1404
1405 /*
1406 * Errors after here are fatal.
1407 */
1408
1409 rc = -EINVAL;
1410
1411 if (!OCFS2_IS_VALID_DINODE(di)) {
1412 rc = ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
1413 (unsigned long long)bh->b_blocknr, 7,
1414 di->i_signature);
1415 goto bail;
1416 }
1417
1418 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1419 rc = ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
1420 (unsigned long long)bh->b_blocknr,
1421 (unsigned long long)le64_to_cpu(di->i_blkno));
1422 goto bail;
1423 }
1424
1425 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1426 rc = ocfs2_error(sb,
1427 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
1428 (unsigned long long)bh->b_blocknr);
1429 goto bail;
1430 }
1431
1432 if (le32_to_cpu(di->i_fs_generation) !=
1433 OCFS2_SB(sb)->fs_generation) {
1434 rc = ocfs2_error(sb,
1435 "Invalid dinode #%llu: fs_generation is %u\n",
1436 (unsigned long long)bh->b_blocknr,
1437 le32_to_cpu(di->i_fs_generation));
1438 goto bail;
1439 }
1440
1441 rc = 0;
1442
1443bail:
1444 return rc;
1445}
1446
1447static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
1448 struct buffer_head *bh)
1449{
1450 int rc = 0;
1451 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1452
1453 trace_ocfs2_filecheck_validate_inode_block(
1454 (unsigned long long)bh->b_blocknr);
1455
1456 BUG_ON(!buffer_uptodate(bh));
1457
1458 /*
1459 * Call ocfs2_validate_meta_ecc() first since it has ecc repair
1460 * function, but we should not return error immediately when ecc
1461 * validation fails, because the reason is quite likely the invalid
1462 * inode number inputed.
1463 */
1464 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1465 if (rc) {
1466 mlog(ML_ERROR,
1467 "Filecheck: checksum failed for dinode %llu\n",
1468 (unsigned long long)bh->b_blocknr);
1469 rc = -OCFS2_FILECHECK_ERR_BLOCKECC;
1470 }
1471
1472 if (!OCFS2_IS_VALID_DINODE(di)) {
1473 mlog(ML_ERROR,
1474 "Filecheck: invalid dinode #%llu: signature = %.*s\n",
1475 (unsigned long long)bh->b_blocknr, 7, di->i_signature);
1476 rc = -OCFS2_FILECHECK_ERR_INVALIDINO;
1477 goto bail;
1478 } else if (rc)
1479 goto bail;
1480
1481 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1482 mlog(ML_ERROR,
1483 "Filecheck: invalid dinode #%llu: i_blkno is %llu\n",
1484 (unsigned long long)bh->b_blocknr,
1485 (unsigned long long)le64_to_cpu(di->i_blkno));
1486 rc = -OCFS2_FILECHECK_ERR_BLOCKNO;
1487 goto bail;
1488 }
1489
1490 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1491 mlog(ML_ERROR,
1492 "Filecheck: invalid dinode #%llu: OCFS2_VALID_FL "
1493 "not set\n",
1494 (unsigned long long)bh->b_blocknr);
1495 rc = -OCFS2_FILECHECK_ERR_VALIDFLAG;
1496 goto bail;
1497 }
1498
1499 if (le32_to_cpu(di->i_fs_generation) !=
1500 OCFS2_SB(sb)->fs_generation) {
1501 mlog(ML_ERROR,
1502 "Filecheck: invalid dinode #%llu: fs_generation is %u\n",
1503 (unsigned long long)bh->b_blocknr,
1504 le32_to_cpu(di->i_fs_generation));
1505 rc = -OCFS2_FILECHECK_ERR_GENERATION;
1506 goto bail;
1507 }
1508
1509bail:
1510 return rc;
1511}
1512
1513static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
1514 struct buffer_head *bh)
1515{
1516 int changed = 0;
1517 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1518
1519 if (!ocfs2_filecheck_validate_inode_block(sb, bh))
1520 return 0;
1521
1522 trace_ocfs2_filecheck_repair_inode_block(
1523 (unsigned long long)bh->b_blocknr);
1524
1525 if (ocfs2_is_hard_readonly(OCFS2_SB(sb)) ||
1526 ocfs2_is_soft_readonly(OCFS2_SB(sb))) {
1527 mlog(ML_ERROR,
1528 "Filecheck: cannot repair dinode #%llu "
1529 "on readonly filesystem\n",
1530 (unsigned long long)bh->b_blocknr);
1531 return -OCFS2_FILECHECK_ERR_READONLY;
1532 }
1533
1534 if (buffer_jbd(bh)) {
1535 mlog(ML_ERROR,
1536 "Filecheck: cannot repair dinode #%llu, "
1537 "its buffer is in jbd\n",
1538 (unsigned long long)bh->b_blocknr);
1539 return -OCFS2_FILECHECK_ERR_INJBD;
1540 }
1541
1542 if (!OCFS2_IS_VALID_DINODE(di)) {
1543 /* Cannot fix invalid inode block */
1544 return -OCFS2_FILECHECK_ERR_INVALIDINO;
1545 }
1546
1547 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1548 /* Cannot just add VALID_FL flag back as a fix,
1549 * need more things to check here.
1550 */
1551 return -OCFS2_FILECHECK_ERR_VALIDFLAG;
1552 }
1553
1554 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1555 di->i_blkno = cpu_to_le64(bh->b_blocknr);
1556 changed = 1;
1557 mlog(ML_ERROR,
1558 "Filecheck: reset dinode #%llu: i_blkno to %llu\n",
1559 (unsigned long long)bh->b_blocknr,
1560 (unsigned long long)le64_to_cpu(di->i_blkno));
1561 }
1562
1563 if (le32_to_cpu(di->i_fs_generation) !=
1564 OCFS2_SB(sb)->fs_generation) {
1565 di->i_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation);
1566 changed = 1;
1567 mlog(ML_ERROR,
1568 "Filecheck: reset dinode #%llu: fs_generation to %u\n",
1569 (unsigned long long)bh->b_blocknr,
1570 le32_to_cpu(di->i_fs_generation));
1571 }
1572
1573 if (changed || ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check)) {
1574 ocfs2_compute_meta_ecc(sb, bh->b_data, &di->i_check);
1575 mark_buffer_dirty(bh);
1576 mlog(ML_ERROR,
1577 "Filecheck: reset dinode #%llu: compute meta ecc\n",
1578 (unsigned long long)bh->b_blocknr);
1579 }
1580
1581 return 0;
1582}
1583
1584static int
1585ocfs2_filecheck_read_inode_block_full(struct inode *inode,
1586 struct buffer_head **bh,
1587 int flags, int type)
1588{
1589 int rc;
1590 struct buffer_head *tmp = *bh;
1591
1592 if (!type) /* Check inode block */
1593 rc = ocfs2_read_blocks(INODE_CACHE(inode),
1594 OCFS2_I(inode)->ip_blkno,
1595 1, &tmp, flags,
1596 ocfs2_filecheck_validate_inode_block);
1597 else /* Repair inode block */
1598 rc = ocfs2_read_blocks(INODE_CACHE(inode),
1599 OCFS2_I(inode)->ip_blkno,
1600 1, &tmp, flags,
1601 ocfs2_filecheck_repair_inode_block);
1602
1603 /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1604 if (!rc && !*bh)
1605 *bh = tmp;
1606
1607 return rc;
1608}
1609
1610int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
1611 int flags)
1612{
1613 int rc;
1614 struct buffer_head *tmp = *bh;
1615
1616 rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno,
1617 1, &tmp, flags, ocfs2_validate_inode_block);
1618
1619 /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1620 if (!rc && !*bh)
1621 *bh = tmp;
1622
1623 return rc;
1624}
1625
1626int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
1627{
1628 return ocfs2_read_inode_block_full(inode, bh, 0);
1629}
1630
1631
1632static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci)
1633{
1634 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1635
1636 return oi->ip_blkno;
1637}
1638
1639static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci)
1640{
1641 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1642
1643 return oi->vfs_inode.i_sb;
1644}
1645
1646static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
1647{
1648 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1649
1650 spin_lock(&oi->ip_lock);
1651}
1652
1653static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
1654{
1655 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1656
1657 spin_unlock(&oi->ip_lock);
1658}
1659
1660static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci)
1661{
1662 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1663
1664 mutex_lock(&oi->ip_io_mutex);
1665}
1666
1667static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci)
1668{
1669 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1670
1671 mutex_unlock(&oi->ip_io_mutex);
1672}
1673
1674const struct ocfs2_caching_operations ocfs2_inode_caching_ops = {
1675 .co_owner = ocfs2_inode_cache_owner,
1676 .co_get_super = ocfs2_inode_cache_get_super,
1677 .co_cache_lock = ocfs2_inode_cache_lock,
1678 .co_cache_unlock = ocfs2_inode_cache_unlock,
1679 .co_io_lock = ocfs2_inode_cache_io_lock,
1680 .co_io_unlock = ocfs2_inode_cache_io_unlock,
1681};
1682
1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * inode.c
5 *
6 * vfs' aops, fops, dops and iops
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
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.
14 *
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.
19 *
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.
24 */
25
26#include <linux/fs.h>
27#include <linux/types.h>
28#include <linux/highmem.h>
29#include <linux/pagemap.h>
30#include <linux/quotaops.h>
31
32#include <asm/byteorder.h>
33
34#include <cluster/masklog.h>
35
36#include "ocfs2.h"
37
38#include "alloc.h"
39#include "dir.h"
40#include "blockcheck.h"
41#include "dlmglue.h"
42#include "extent_map.h"
43#include "file.h"
44#include "heartbeat.h"
45#include "inode.h"
46#include "journal.h"
47#include "namei.h"
48#include "suballoc.h"
49#include "super.h"
50#include "symlink.h"
51#include "sysfile.h"
52#include "uptodate.h"
53#include "xattr.h"
54#include "refcounttree.h"
55#include "ocfs2_trace.h"
56
57#include "buffer_head_io.h"
58
59struct ocfs2_find_inode_args
60{
61 u64 fi_blkno;
62 unsigned long fi_ino;
63 unsigned int fi_flags;
64 unsigned int fi_sysfile_type;
65};
66
67static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
68
69static int ocfs2_read_locked_inode(struct inode *inode,
70 struct ocfs2_find_inode_args *args);
71static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
72static int ocfs2_find_actor(struct inode *inode, void *opaque);
73static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
74 struct inode *inode,
75 struct buffer_head *fe_bh);
76
77void ocfs2_set_inode_flags(struct inode *inode)
78{
79 unsigned int flags = OCFS2_I(inode)->ip_attr;
80
81 inode->i_flags &= ~(S_IMMUTABLE |
82 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
83
84 if (flags & OCFS2_IMMUTABLE_FL)
85 inode->i_flags |= S_IMMUTABLE;
86
87 if (flags & OCFS2_SYNC_FL)
88 inode->i_flags |= S_SYNC;
89 if (flags & OCFS2_APPEND_FL)
90 inode->i_flags |= S_APPEND;
91 if (flags & OCFS2_NOATIME_FL)
92 inode->i_flags |= S_NOATIME;
93 if (flags & OCFS2_DIRSYNC_FL)
94 inode->i_flags |= S_DIRSYNC;
95}
96
97/* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
98void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
99{
100 unsigned int flags = oi->vfs_inode.i_flags;
101
102 oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
103 OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
104 if (flags & S_SYNC)
105 oi->ip_attr |= OCFS2_SYNC_FL;
106 if (flags & S_APPEND)
107 oi->ip_attr |= OCFS2_APPEND_FL;
108 if (flags & S_IMMUTABLE)
109 oi->ip_attr |= OCFS2_IMMUTABLE_FL;
110 if (flags & S_NOATIME)
111 oi->ip_attr |= OCFS2_NOATIME_FL;
112 if (flags & S_DIRSYNC)
113 oi->ip_attr |= OCFS2_DIRSYNC_FL;
114}
115
116struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno)
117{
118 struct ocfs2_find_inode_args args;
119
120 args.fi_blkno = blkno;
121 args.fi_flags = 0;
122 args.fi_ino = ino_from_blkno(sb, blkno);
123 args.fi_sysfile_type = 0;
124
125 return ilookup5(sb, blkno, ocfs2_find_actor, &args);
126}
127struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
128 int sysfile_type)
129{
130 struct inode *inode = NULL;
131 struct super_block *sb = osb->sb;
132 struct ocfs2_find_inode_args args;
133 journal_t *journal = OCFS2_SB(sb)->journal->j_journal;
134
135 trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
136 sysfile_type);
137
138 /* Ok. By now we've either got the offsets passed to us by the
139 * caller, or we just pulled them off the bh. Lets do some
140 * sanity checks to make sure they're OK. */
141 if (blkno == 0) {
142 inode = ERR_PTR(-EINVAL);
143 mlog_errno(PTR_ERR(inode));
144 goto bail;
145 }
146
147 args.fi_blkno = blkno;
148 args.fi_flags = flags;
149 args.fi_ino = ino_from_blkno(sb, blkno);
150 args.fi_sysfile_type = sysfile_type;
151
152 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
153 ocfs2_init_locked_inode, &args);
154 /* inode was *not* in the inode cache. 2.6.x requires
155 * us to do our own read_inode call and unlock it
156 * afterwards. */
157 if (inode == NULL) {
158 inode = ERR_PTR(-ENOMEM);
159 mlog_errno(PTR_ERR(inode));
160 goto bail;
161 }
162 trace_ocfs2_iget5_locked(inode->i_state);
163 if (inode->i_state & I_NEW) {
164 ocfs2_read_locked_inode(inode, &args);
165 unlock_new_inode(inode);
166 }
167 if (is_bad_inode(inode)) {
168 iput(inode);
169 inode = ERR_PTR(-ESTALE);
170 goto bail;
171 }
172
173 /*
174 * Set transaction id's of transactions that have to be committed
175 * to finish f[data]sync. We set them to currently running transaction
176 * as we cannot be sure that the inode or some of its metadata isn't
177 * part of the transaction - the inode could have been reclaimed and
178 * now it is reread from disk.
179 */
180 if (journal) {
181 transaction_t *transaction;
182 tid_t tid;
183 struct ocfs2_inode_info *oi = OCFS2_I(inode);
184
185 read_lock(&journal->j_state_lock);
186 if (journal->j_running_transaction)
187 transaction = journal->j_running_transaction;
188 else
189 transaction = journal->j_committing_transaction;
190 if (transaction)
191 tid = transaction->t_tid;
192 else
193 tid = journal->j_commit_sequence;
194 read_unlock(&journal->j_state_lock);
195 oi->i_sync_tid = tid;
196 oi->i_datasync_tid = tid;
197 }
198
199bail:
200 if (!IS_ERR(inode)) {
201 trace_ocfs2_iget_end(inode,
202 (unsigned long long)OCFS2_I(inode)->ip_blkno);
203 }
204
205 return inode;
206}
207
208
209/*
210 * here's how inodes get read from disk:
211 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
212 * found? : return the in-memory inode
213 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
214 */
215
216static int ocfs2_find_actor(struct inode *inode, void *opaque)
217{
218 struct ocfs2_find_inode_args *args = NULL;
219 struct ocfs2_inode_info *oi = OCFS2_I(inode);
220 int ret = 0;
221
222 args = opaque;
223
224 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
225
226 trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno);
227
228 if (oi->ip_blkno != args->fi_blkno)
229 goto bail;
230
231 ret = 1;
232bail:
233 return ret;
234}
235
236/*
237 * initialize the new inode, but don't do anything that would cause
238 * us to sleep.
239 * return 0 on success, 1 on failure
240 */
241static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
242{
243 struct ocfs2_find_inode_args *args = opaque;
244 static struct lock_class_key ocfs2_quota_ip_alloc_sem_key,
245 ocfs2_file_ip_alloc_sem_key;
246
247 inode->i_ino = args->fi_ino;
248 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
249 if (args->fi_sysfile_type != 0)
250 lockdep_set_class(&inode->i_mutex,
251 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
252 if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE ||
253 args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE ||
254 args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE ||
255 args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE)
256 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
257 &ocfs2_quota_ip_alloc_sem_key);
258 else
259 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
260 &ocfs2_file_ip_alloc_sem_key);
261
262 return 0;
263}
264
265void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
266 int create_ino)
267{
268 struct super_block *sb;
269 struct ocfs2_super *osb;
270 int use_plocks = 1;
271
272 sb = inode->i_sb;
273 osb = OCFS2_SB(sb);
274
275 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
276 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
277 use_plocks = 0;
278
279 /*
280 * These have all been checked by ocfs2_read_inode_block() or set
281 * by ocfs2_mknod_locked(), so a failure is a code bug.
282 */
283 BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode
284 cannot create a superblock
285 inode today. change if
286 that is needed. */
287 BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
288 BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
289
290
291 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
292 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
293 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
294
295 inode->i_version = 1;
296 inode->i_generation = le32_to_cpu(fe->i_generation);
297 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
298 inode->i_mode = le16_to_cpu(fe->i_mode);
299 i_uid_write(inode, le32_to_cpu(fe->i_uid));
300 i_gid_write(inode, le32_to_cpu(fe->i_gid));
301
302 /* Fast symlinks will have i_size but no allocated clusters. */
303 if (S_ISLNK(inode->i_mode) && !fe->i_clusters) {
304 inode->i_blocks = 0;
305 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
306 } else {
307 inode->i_blocks = ocfs2_inode_sector_count(inode);
308 inode->i_mapping->a_ops = &ocfs2_aops;
309 }
310 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
311 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
312 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
313 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
314 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
315 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
316
317 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
318 mlog(ML_ERROR,
319 "ip_blkno %llu != i_blkno %llu!\n",
320 (unsigned long long)OCFS2_I(inode)->ip_blkno,
321 (unsigned long long)le64_to_cpu(fe->i_blkno));
322
323 set_nlink(inode, ocfs2_read_links_count(fe));
324
325 trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
326 le32_to_cpu(fe->i_flags));
327 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
328 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
329 inode->i_flags |= S_NOQUOTA;
330 }
331
332 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
333 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
334 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
335 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
336 } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
337 inode->i_flags |= S_NOQUOTA;
338 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
339 /* we can't actually hit this as read_inode can't
340 * handle superblocks today ;-) */
341 BUG();
342 }
343
344 switch (inode->i_mode & S_IFMT) {
345 case S_IFREG:
346 if (use_plocks)
347 inode->i_fop = &ocfs2_fops;
348 else
349 inode->i_fop = &ocfs2_fops_no_plocks;
350 inode->i_op = &ocfs2_file_iops;
351 i_size_write(inode, le64_to_cpu(fe->i_size));
352 break;
353 case S_IFDIR:
354 inode->i_op = &ocfs2_dir_iops;
355 if (use_plocks)
356 inode->i_fop = &ocfs2_dops;
357 else
358 inode->i_fop = &ocfs2_dops_no_plocks;
359 i_size_write(inode, le64_to_cpu(fe->i_size));
360 OCFS2_I(inode)->ip_dir_lock_gen = 1;
361 break;
362 case S_IFLNK:
363 inode->i_op = &ocfs2_symlink_inode_operations;
364 i_size_write(inode, le64_to_cpu(fe->i_size));
365 break;
366 default:
367 inode->i_op = &ocfs2_special_file_iops;
368 init_special_inode(inode, inode->i_mode,
369 inode->i_rdev);
370 break;
371 }
372
373 if (create_ino) {
374 inode->i_ino = ino_from_blkno(inode->i_sb,
375 le64_to_cpu(fe->i_blkno));
376
377 /*
378 * If we ever want to create system files from kernel,
379 * the generation argument to
380 * ocfs2_inode_lock_res_init() will have to change.
381 */
382 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
383
384 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
385 OCFS2_LOCK_TYPE_META, 0, inode);
386
387 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
388 OCFS2_LOCK_TYPE_OPEN, 0, inode);
389 }
390
391 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
392 OCFS2_LOCK_TYPE_RW, inode->i_generation,
393 inode);
394
395 ocfs2_set_inode_flags(inode);
396
397 OCFS2_I(inode)->ip_last_used_slot = 0;
398 OCFS2_I(inode)->ip_last_used_group = 0;
399
400 if (S_ISDIR(inode->i_mode))
401 ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
402 OCFS2_RESV_FLAG_DIR);
403}
404
405static int ocfs2_read_locked_inode(struct inode *inode,
406 struct ocfs2_find_inode_args *args)
407{
408 struct super_block *sb;
409 struct ocfs2_super *osb;
410 struct ocfs2_dinode *fe;
411 struct buffer_head *bh = NULL;
412 int status, can_lock;
413 u32 generation = 0;
414
415 status = -EINVAL;
416 sb = inode->i_sb;
417 osb = OCFS2_SB(sb);
418
419 /*
420 * To improve performance of cold-cache inode stats, we take
421 * the cluster lock here if possible.
422 *
423 * Generally, OCFS2 never trusts the contents of an inode
424 * unless it's holding a cluster lock, so taking it here isn't
425 * a correctness issue as much as it is a performance
426 * improvement.
427 *
428 * There are three times when taking the lock is not a good idea:
429 *
430 * 1) During startup, before we have initialized the DLM.
431 *
432 * 2) If we are reading certain system files which never get
433 * cluster locks (local alloc, truncate log).
434 *
435 * 3) If the process doing the iget() is responsible for
436 * orphan dir recovery. We're holding the orphan dir lock and
437 * can get into a deadlock with another process on another
438 * node in ->delete_inode().
439 *
440 * #1 and #2 can be simply solved by never taking the lock
441 * here for system files (which are the only type we read
442 * during mount). It's a heavier approach, but our main
443 * concern is user-accessible files anyway.
444 *
445 * #3 works itself out because we'll eventually take the
446 * cluster lock before trusting anything anyway.
447 */
448 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
449 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
450 && !ocfs2_mount_local(osb);
451
452 trace_ocfs2_read_locked_inode(
453 (unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock);
454
455 /*
456 * To maintain backwards compatibility with older versions of
457 * ocfs2-tools, we still store the generation value for system
458 * files. The only ones that actually matter to userspace are
459 * the journals, but it's easier and inexpensive to just flag
460 * all system files similarly.
461 */
462 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
463 generation = osb->fs_generation;
464
465 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
466 OCFS2_LOCK_TYPE_META,
467 generation, inode);
468
469 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
470 OCFS2_LOCK_TYPE_OPEN,
471 0, inode);
472
473 if (can_lock) {
474 status = ocfs2_open_lock(inode);
475 if (status) {
476 make_bad_inode(inode);
477 mlog_errno(status);
478 return status;
479 }
480 status = ocfs2_inode_lock(inode, NULL, 0);
481 if (status) {
482 make_bad_inode(inode);
483 mlog_errno(status);
484 return status;
485 }
486 }
487
488 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
489 status = ocfs2_try_open_lock(inode, 0);
490 if (status) {
491 make_bad_inode(inode);
492 return status;
493 }
494 }
495
496 if (can_lock) {
497 status = ocfs2_read_inode_block_full(inode, &bh,
498 OCFS2_BH_IGNORE_CACHE);
499 } else {
500 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
501 /*
502 * If buffer is in jbd, then its checksum may not have been
503 * computed as yet.
504 */
505 if (!status && !buffer_jbd(bh))
506 status = ocfs2_validate_inode_block(osb->sb, bh);
507 }
508 if (status < 0) {
509 mlog_errno(status);
510 goto bail;
511 }
512
513 status = -EINVAL;
514 fe = (struct ocfs2_dinode *) bh->b_data;
515
516 /*
517 * This is a code bug. Right now the caller needs to
518 * understand whether it is asking for a system file inode or
519 * not so the proper lock names can be built.
520 */
521 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
522 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
523 "Inode %llu: system file state is ambigous\n",
524 (unsigned long long)args->fi_blkno);
525
526 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
527 S_ISBLK(le16_to_cpu(fe->i_mode)))
528 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
529
530 ocfs2_populate_inode(inode, fe, 0);
531
532 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
533
534 status = 0;
535
536bail:
537 if (can_lock)
538 ocfs2_inode_unlock(inode, 0);
539
540 if (status < 0)
541 make_bad_inode(inode);
542
543 if (args && bh)
544 brelse(bh);
545
546 return status;
547}
548
549void ocfs2_sync_blockdev(struct super_block *sb)
550{
551 sync_blockdev(sb->s_bdev);
552}
553
554static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
555 struct inode *inode,
556 struct buffer_head *fe_bh)
557{
558 int status = 0;
559 struct ocfs2_dinode *fe;
560 handle_t *handle = NULL;
561
562 fe = (struct ocfs2_dinode *) fe_bh->b_data;
563
564 /*
565 * This check will also skip truncate of inodes with inline
566 * data and fast symlinks.
567 */
568 if (fe->i_clusters) {
569 if (ocfs2_should_order_data(inode))
570 ocfs2_begin_ordered_truncate(inode, 0);
571
572 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
573 if (IS_ERR(handle)) {
574 status = PTR_ERR(handle);
575 handle = NULL;
576 mlog_errno(status);
577 goto out;
578 }
579
580 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
581 fe_bh,
582 OCFS2_JOURNAL_ACCESS_WRITE);
583 if (status < 0) {
584 mlog_errno(status);
585 goto out;
586 }
587
588 i_size_write(inode, 0);
589
590 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
591 if (status < 0) {
592 mlog_errno(status);
593 goto out;
594 }
595
596 ocfs2_commit_trans(osb, handle);
597 handle = NULL;
598
599 status = ocfs2_commit_truncate(osb, inode, fe_bh);
600 if (status < 0) {
601 mlog_errno(status);
602 goto out;
603 }
604 }
605
606out:
607 if (handle)
608 ocfs2_commit_trans(osb, handle);
609 return status;
610}
611
612static int ocfs2_remove_inode(struct inode *inode,
613 struct buffer_head *di_bh,
614 struct inode *orphan_dir_inode,
615 struct buffer_head *orphan_dir_bh)
616{
617 int status;
618 struct inode *inode_alloc_inode = NULL;
619 struct buffer_head *inode_alloc_bh = NULL;
620 handle_t *handle;
621 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
622 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
623
624 inode_alloc_inode =
625 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
626 le16_to_cpu(di->i_suballoc_slot));
627 if (!inode_alloc_inode) {
628 status = -EEXIST;
629 mlog_errno(status);
630 goto bail;
631 }
632
633 mutex_lock(&inode_alloc_inode->i_mutex);
634 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
635 if (status < 0) {
636 mutex_unlock(&inode_alloc_inode->i_mutex);
637
638 mlog_errno(status);
639 goto bail;
640 }
641
642 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
643 ocfs2_quota_trans_credits(inode->i_sb));
644 if (IS_ERR(handle)) {
645 status = PTR_ERR(handle);
646 mlog_errno(status);
647 goto bail_unlock;
648 }
649
650 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
651 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
652 orphan_dir_bh);
653 if (status < 0) {
654 mlog_errno(status);
655 goto bail_commit;
656 }
657 }
658
659 /* set the inodes dtime */
660 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
661 OCFS2_JOURNAL_ACCESS_WRITE);
662 if (status < 0) {
663 mlog_errno(status);
664 goto bail_commit;
665 }
666
667 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
668 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
669 ocfs2_journal_dirty(handle, di_bh);
670
671 ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
672 dquot_free_inode(inode);
673
674 status = ocfs2_free_dinode(handle, inode_alloc_inode,
675 inode_alloc_bh, di);
676 if (status < 0)
677 mlog_errno(status);
678
679bail_commit:
680 ocfs2_commit_trans(osb, handle);
681bail_unlock:
682 ocfs2_inode_unlock(inode_alloc_inode, 1);
683 mutex_unlock(&inode_alloc_inode->i_mutex);
684 brelse(inode_alloc_bh);
685bail:
686 iput(inode_alloc_inode);
687
688 return status;
689}
690
691/*
692 * Serialize with orphan dir recovery. If the process doing
693 * recovery on this orphan dir does an iget() with the dir
694 * i_mutex held, we'll deadlock here. Instead we detect this
695 * and exit early - recovery will wipe this inode for us.
696 */
697static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
698 int slot)
699{
700 int ret = 0;
701
702 spin_lock(&osb->osb_lock);
703 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
704 ret = -EDEADLK;
705 goto out;
706 }
707 /* This signals to the orphan recovery process that it should
708 * wait for us to handle the wipe. */
709 osb->osb_orphan_wipes[slot]++;
710out:
711 spin_unlock(&osb->osb_lock);
712 trace_ocfs2_check_orphan_recovery_state(slot, ret);
713 return ret;
714}
715
716static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
717 int slot)
718{
719 spin_lock(&osb->osb_lock);
720 osb->osb_orphan_wipes[slot]--;
721 spin_unlock(&osb->osb_lock);
722
723 wake_up(&osb->osb_wipe_event);
724}
725
726static int ocfs2_wipe_inode(struct inode *inode,
727 struct buffer_head *di_bh)
728{
729 int status, orphaned_slot = -1;
730 struct inode *orphan_dir_inode = NULL;
731 struct buffer_head *orphan_dir_bh = NULL;
732 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
733 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
734
735 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
736 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
737
738 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
739 if (status)
740 return status;
741
742 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
743 ORPHAN_DIR_SYSTEM_INODE,
744 orphaned_slot);
745 if (!orphan_dir_inode) {
746 status = -EEXIST;
747 mlog_errno(status);
748 goto bail;
749 }
750
751 /* Lock the orphan dir. The lock will be held for the entire
752 * delete_inode operation. We do this now to avoid races with
753 * recovery completion on other nodes. */
754 mutex_lock(&orphan_dir_inode->i_mutex);
755 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
756 if (status < 0) {
757 mutex_unlock(&orphan_dir_inode->i_mutex);
758
759 mlog_errno(status);
760 goto bail;
761 }
762 }
763
764 /* we do this while holding the orphan dir lock because we
765 * don't want recovery being run from another node to try an
766 * inode delete underneath us -- this will result in two nodes
767 * truncating the same file! */
768 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
769 if (status < 0) {
770 mlog_errno(status);
771 goto bail_unlock_dir;
772 }
773
774 /* Remove any dir index tree */
775 if (S_ISDIR(inode->i_mode)) {
776 status = ocfs2_dx_dir_truncate(inode, di_bh);
777 if (status) {
778 mlog_errno(status);
779 goto bail_unlock_dir;
780 }
781 }
782
783 /*Free extended attribute resources associated with this inode.*/
784 status = ocfs2_xattr_remove(inode, di_bh);
785 if (status < 0) {
786 mlog_errno(status);
787 goto bail_unlock_dir;
788 }
789
790 status = ocfs2_remove_refcount_tree(inode, di_bh);
791 if (status < 0) {
792 mlog_errno(status);
793 goto bail_unlock_dir;
794 }
795
796 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
797 orphan_dir_bh);
798 if (status < 0)
799 mlog_errno(status);
800
801bail_unlock_dir:
802 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)
803 return status;
804
805 ocfs2_inode_unlock(orphan_dir_inode, 1);
806 mutex_unlock(&orphan_dir_inode->i_mutex);
807 brelse(orphan_dir_bh);
808bail:
809 iput(orphan_dir_inode);
810 ocfs2_signal_wipe_completion(osb, orphaned_slot);
811
812 return status;
813}
814
815/* There is a series of simple checks that should be done before a
816 * trylock is even considered. Encapsulate those in this function. */
817static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
818{
819 int ret = 0;
820 struct ocfs2_inode_info *oi = OCFS2_I(inode);
821 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
822
823 trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task,
824 (unsigned long long)oi->ip_blkno,
825 oi->ip_flags);
826
827 /* We shouldn't be getting here for the root directory
828 * inode.. */
829 if (inode == osb->root_inode) {
830 mlog(ML_ERROR, "Skipping delete of root inode.\n");
831 goto bail;
832 }
833
834 /*
835 * If we're coming from downconvert_thread we can't go into our own
836 * voting [hello, deadlock city!] so we cannot delete the inode. But
837 * since we dropped last inode ref when downconverting dentry lock,
838 * we cannot have the file open and thus the node doing unlink will
839 * take care of deleting the inode.
840 */
841 if (current == osb->dc_task)
842 goto bail;
843
844 spin_lock(&oi->ip_lock);
845 /* OCFS2 *never* deletes system files. This should technically
846 * never get here as system file inodes should always have a
847 * positive link count. */
848 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
849 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
850 (unsigned long long)oi->ip_blkno);
851 goto bail_unlock;
852 }
853
854 ret = 1;
855bail_unlock:
856 spin_unlock(&oi->ip_lock);
857bail:
858 return ret;
859}
860
861/* Query the cluster to determine whether we should wipe an inode from
862 * disk or not.
863 *
864 * Requires the inode to have the cluster lock. */
865static int ocfs2_query_inode_wipe(struct inode *inode,
866 struct buffer_head *di_bh,
867 int *wipe)
868{
869 int status = 0, reason = 0;
870 struct ocfs2_inode_info *oi = OCFS2_I(inode);
871 struct ocfs2_dinode *di;
872
873 *wipe = 0;
874
875 trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno,
876 inode->i_nlink);
877
878 /* While we were waiting for the cluster lock in
879 * ocfs2_delete_inode, another node might have asked to delete
880 * the inode. Recheck our flags to catch this. */
881 if (!ocfs2_inode_is_valid_to_delete(inode)) {
882 reason = 1;
883 goto bail;
884 }
885
886 /* Now that we have an up to date inode, we can double check
887 * the link count. */
888 if (inode->i_nlink)
889 goto bail;
890
891 /* Do some basic inode verification... */
892 di = (struct ocfs2_dinode *) di_bh->b_data;
893 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) &&
894 !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
895 /*
896 * Inodes in the orphan dir must have ORPHANED_FL. The only
897 * inodes that come back out of the orphan dir are reflink
898 * targets. A reflink target may be moved out of the orphan
899 * dir between the time we scan the directory and the time we
900 * process it. This would lead to HAS_REFCOUNT_FL being set but
901 * ORPHANED_FL not.
902 */
903 if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) {
904 reason = 2;
905 goto bail;
906 }
907
908 /* for lack of a better error? */
909 status = -EEXIST;
910 mlog(ML_ERROR,
911 "Inode %llu (on-disk %llu) not orphaned! "
912 "Disk flags 0x%x, inode flags 0x%x\n",
913 (unsigned long long)oi->ip_blkno,
914 (unsigned long long)le64_to_cpu(di->i_blkno),
915 le32_to_cpu(di->i_flags), oi->ip_flags);
916 goto bail;
917 }
918
919 /* has someone already deleted us?! baaad... */
920 if (di->i_dtime) {
921 status = -EEXIST;
922 mlog_errno(status);
923 goto bail;
924 }
925
926 /*
927 * This is how ocfs2 determines whether an inode is still live
928 * within the cluster. Every node takes a shared read lock on
929 * the inode open lock in ocfs2_read_locked_inode(). When we
930 * get to ->delete_inode(), each node tries to convert it's
931 * lock to an exclusive. Trylocks are serialized by the inode
932 * meta data lock. If the upconvert succeeds, we know the inode
933 * is no longer live and can be deleted.
934 *
935 * Though we call this with the meta data lock held, the
936 * trylock keeps us from ABBA deadlock.
937 */
938 status = ocfs2_try_open_lock(inode, 1);
939 if (status == -EAGAIN) {
940 status = 0;
941 reason = 3;
942 goto bail;
943 }
944 if (status < 0) {
945 mlog_errno(status);
946 goto bail;
947 }
948
949 *wipe = 1;
950 trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot));
951
952bail:
953 trace_ocfs2_query_inode_wipe_end(status, reason);
954 return status;
955}
956
957/* Support function for ocfs2_delete_inode. Will help us keep the
958 * inode data in a consistent state for clear_inode. Always truncates
959 * pages, optionally sync's them first. */
960static void ocfs2_cleanup_delete_inode(struct inode *inode,
961 int sync_data)
962{
963 trace_ocfs2_cleanup_delete_inode(
964 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
965 if (sync_data)
966 filemap_write_and_wait(inode->i_mapping);
967 truncate_inode_pages_final(&inode->i_data);
968}
969
970static void ocfs2_delete_inode(struct inode *inode)
971{
972 int wipe, status;
973 sigset_t oldset;
974 struct buffer_head *di_bh = NULL;
975
976 trace_ocfs2_delete_inode(inode->i_ino,
977 (unsigned long long)OCFS2_I(inode)->ip_blkno,
978 is_bad_inode(inode));
979
980 /* When we fail in read_inode() we mark inode as bad. The second test
981 * catches the case when inode allocation fails before allocating
982 * a block for inode. */
983 if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno)
984 goto bail;
985
986 if (!ocfs2_inode_is_valid_to_delete(inode)) {
987 /* It's probably not necessary to truncate_inode_pages
988 * here but we do it for safety anyway (it will most
989 * likely be a no-op anyway) */
990 ocfs2_cleanup_delete_inode(inode, 0);
991 goto bail;
992 }
993
994 dquot_initialize(inode);
995
996 /* We want to block signals in delete_inode as the lock and
997 * messaging paths may return us -ERESTARTSYS. Which would
998 * cause us to exit early, resulting in inodes being orphaned
999 * forever. */
1000 ocfs2_block_signals(&oldset);
1001
1002 /*
1003 * Synchronize us against ocfs2_get_dentry. We take this in
1004 * shared mode so that all nodes can still concurrently
1005 * process deletes.
1006 */
1007 status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0);
1008 if (status < 0) {
1009 mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status);
1010 ocfs2_cleanup_delete_inode(inode, 0);
1011 goto bail_unblock;
1012 }
1013 /* Lock down the inode. This gives us an up to date view of
1014 * it's metadata (for verification), and allows us to
1015 * serialize delete_inode on multiple nodes.
1016 *
1017 * Even though we might be doing a truncate, we don't take the
1018 * allocation lock here as it won't be needed - nobody will
1019 * have the file open.
1020 */
1021 status = ocfs2_inode_lock(inode, &di_bh, 1);
1022 if (status < 0) {
1023 if (status != -ENOENT)
1024 mlog_errno(status);
1025 ocfs2_cleanup_delete_inode(inode, 0);
1026 goto bail_unlock_nfs_sync;
1027 }
1028
1029 /* Query the cluster. This will be the final decision made
1030 * before we go ahead and wipe the inode. */
1031 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
1032 if (!wipe || status < 0) {
1033 /* Error and remote inode busy both mean we won't be
1034 * removing the inode, so they take almost the same
1035 * path. */
1036 if (status < 0)
1037 mlog_errno(status);
1038
1039 /* Someone in the cluster has disallowed a wipe of
1040 * this inode, or it was never completely
1041 * orphaned. Write out the pages and exit now. */
1042 ocfs2_cleanup_delete_inode(inode, 1);
1043 goto bail_unlock_inode;
1044 }
1045
1046 ocfs2_cleanup_delete_inode(inode, 0);
1047
1048 status = ocfs2_wipe_inode(inode, di_bh);
1049 if (status < 0) {
1050 if (status != -EDEADLK)
1051 mlog_errno(status);
1052 goto bail_unlock_inode;
1053 }
1054
1055 /*
1056 * Mark the inode as successfully deleted.
1057 *
1058 * This is important for ocfs2_clear_inode() as it will check
1059 * this flag and skip any checkpointing work
1060 *
1061 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1062 * the LVB for other nodes.
1063 */
1064 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
1065
1066bail_unlock_inode:
1067 ocfs2_inode_unlock(inode, 1);
1068 brelse(di_bh);
1069
1070bail_unlock_nfs_sync:
1071 ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0);
1072
1073bail_unblock:
1074 ocfs2_unblock_signals(&oldset);
1075bail:
1076 return;
1077}
1078
1079static void ocfs2_clear_inode(struct inode *inode)
1080{
1081 int status;
1082 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1083 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1084
1085 clear_inode(inode);
1086 trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno,
1087 inode->i_nlink);
1088
1089 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1090 "Inode=%lu\n", inode->i_ino);
1091
1092 dquot_drop(inode);
1093
1094 /* To preven remote deletes we hold open lock before, now it
1095 * is time to unlock PR and EX open locks. */
1096 ocfs2_open_unlock(inode);
1097
1098 /* Do these before all the other work so that we don't bounce
1099 * the downconvert thread while waiting to destroy the locks. */
1100 ocfs2_mark_lockres_freeing(osb, &oi->ip_rw_lockres);
1101 ocfs2_mark_lockres_freeing(osb, &oi->ip_inode_lockres);
1102 ocfs2_mark_lockres_freeing(osb, &oi->ip_open_lockres);
1103
1104 ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap,
1105 &oi->ip_la_data_resv);
1106 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1107
1108 /* We very well may get a clear_inode before all an inodes
1109 * metadata has hit disk. Of course, we can't drop any cluster
1110 * locks until the journal has finished with it. The only
1111 * exception here are successfully wiped inodes - their
1112 * metadata can now be considered to be part of the system
1113 * inodes from which it came. */
1114 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1115 ocfs2_checkpoint_inode(inode);
1116
1117 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1118 "Clear inode of %llu, inode has io markers\n",
1119 (unsigned long long)oi->ip_blkno);
1120
1121 ocfs2_extent_map_trunc(inode, 0);
1122
1123 status = ocfs2_drop_inode_locks(inode);
1124 if (status < 0)
1125 mlog_errno(status);
1126
1127 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1128 ocfs2_lock_res_free(&oi->ip_inode_lockres);
1129 ocfs2_lock_res_free(&oi->ip_open_lockres);
1130
1131 ocfs2_metadata_cache_exit(INODE_CACHE(inode));
1132
1133 mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
1134 "Clear inode of %llu, inode has %u cache items\n",
1135 (unsigned long long)oi->ip_blkno,
1136 INODE_CACHE(inode)->ci_num_cached);
1137
1138 mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE),
1139 "Clear inode of %llu, inode has a bad flag\n",
1140 (unsigned long long)oi->ip_blkno);
1141
1142 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1143 "Clear inode of %llu, inode is locked\n",
1144 (unsigned long long)oi->ip_blkno);
1145
1146 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1147 "Clear inode of %llu, io_mutex is locked\n",
1148 (unsigned long long)oi->ip_blkno);
1149 mutex_unlock(&oi->ip_io_mutex);
1150
1151 /*
1152 * down_trylock() returns 0, down_write_trylock() returns 1
1153 * kernel 1, world 0
1154 */
1155 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1156 "Clear inode of %llu, alloc_sem is locked\n",
1157 (unsigned long long)oi->ip_blkno);
1158 up_write(&oi->ip_alloc_sem);
1159
1160 mlog_bug_on_msg(oi->ip_open_count,
1161 "Clear inode of %llu has open count %d\n",
1162 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1163
1164 /* Clear all other flags. */
1165 oi->ip_flags = 0;
1166 oi->ip_dir_start_lookup = 0;
1167 oi->ip_blkno = 0ULL;
1168
1169 /*
1170 * ip_jinode is used to track txns against this inode. We ensure that
1171 * the journal is flushed before journal shutdown. Thus it is safe to
1172 * have inodes get cleaned up after journal shutdown.
1173 */
1174 jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
1175 &oi->ip_jinode);
1176}
1177
1178void ocfs2_evict_inode(struct inode *inode)
1179{
1180 if (!inode->i_nlink ||
1181 (OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) {
1182 ocfs2_delete_inode(inode);
1183 } else {
1184 truncate_inode_pages_final(&inode->i_data);
1185 }
1186 ocfs2_clear_inode(inode);
1187}
1188
1189/* Called under inode_lock, with no more references on the
1190 * struct inode, so it's safe here to check the flags field
1191 * and to manipulate i_nlink without any other locks. */
1192int ocfs2_drop_inode(struct inode *inode)
1193{
1194 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1195 int res;
1196
1197 trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno,
1198 inode->i_nlink, oi->ip_flags);
1199
1200 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1201 res = 1;
1202 else
1203 res = generic_drop_inode(inode);
1204
1205 return res;
1206}
1207
1208/*
1209 * This is called from our getattr.
1210 */
1211int ocfs2_inode_revalidate(struct dentry *dentry)
1212{
1213 struct inode *inode = dentry->d_inode;
1214 int status = 0;
1215
1216 trace_ocfs2_inode_revalidate(inode,
1217 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL,
1218 inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0);
1219
1220 if (!inode) {
1221 status = -ENOENT;
1222 goto bail;
1223 }
1224
1225 spin_lock(&OCFS2_I(inode)->ip_lock);
1226 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1227 spin_unlock(&OCFS2_I(inode)->ip_lock);
1228 status = -ENOENT;
1229 goto bail;
1230 }
1231 spin_unlock(&OCFS2_I(inode)->ip_lock);
1232
1233 /* Let ocfs2_inode_lock do the work of updating our struct
1234 * inode for us. */
1235 status = ocfs2_inode_lock(inode, NULL, 0);
1236 if (status < 0) {
1237 if (status != -ENOENT)
1238 mlog_errno(status);
1239 goto bail;
1240 }
1241 ocfs2_inode_unlock(inode, 0);
1242bail:
1243 return status;
1244}
1245
1246/*
1247 * Updates a disk inode from a
1248 * struct inode.
1249 * Only takes ip_lock.
1250 */
1251int ocfs2_mark_inode_dirty(handle_t *handle,
1252 struct inode *inode,
1253 struct buffer_head *bh)
1254{
1255 int status;
1256 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1257
1258 trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno);
1259
1260 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1261 OCFS2_JOURNAL_ACCESS_WRITE);
1262 if (status < 0) {
1263 mlog_errno(status);
1264 goto leave;
1265 }
1266
1267 spin_lock(&OCFS2_I(inode)->ip_lock);
1268 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1269 ocfs2_get_inode_flags(OCFS2_I(inode));
1270 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1271 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1272 spin_unlock(&OCFS2_I(inode)->ip_lock);
1273
1274 fe->i_size = cpu_to_le64(i_size_read(inode));
1275 ocfs2_set_links_count(fe, inode->i_nlink);
1276 fe->i_uid = cpu_to_le32(i_uid_read(inode));
1277 fe->i_gid = cpu_to_le32(i_gid_read(inode));
1278 fe->i_mode = cpu_to_le16(inode->i_mode);
1279 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1280 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1281 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1282 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1283 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1284 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1285
1286 ocfs2_journal_dirty(handle, bh);
1287 ocfs2_update_inode_fsync_trans(handle, inode, 1);
1288leave:
1289 return status;
1290}
1291
1292/*
1293 *
1294 * Updates a struct inode from a disk inode.
1295 * does no i/o, only takes ip_lock.
1296 */
1297void ocfs2_refresh_inode(struct inode *inode,
1298 struct ocfs2_dinode *fe)
1299{
1300 spin_lock(&OCFS2_I(inode)->ip_lock);
1301
1302 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1303 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1304 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1305 ocfs2_set_inode_flags(inode);
1306 i_size_write(inode, le64_to_cpu(fe->i_size));
1307 set_nlink(inode, ocfs2_read_links_count(fe));
1308 i_uid_write(inode, le32_to_cpu(fe->i_uid));
1309 i_gid_write(inode, le32_to_cpu(fe->i_gid));
1310 inode->i_mode = le16_to_cpu(fe->i_mode);
1311 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1312 inode->i_blocks = 0;
1313 else
1314 inode->i_blocks = ocfs2_inode_sector_count(inode);
1315 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1316 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1317 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1318 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1319 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1320 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1321
1322 spin_unlock(&OCFS2_I(inode)->ip_lock);
1323}
1324
1325int ocfs2_validate_inode_block(struct super_block *sb,
1326 struct buffer_head *bh)
1327{
1328 int rc;
1329 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1330
1331 trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr);
1332
1333 BUG_ON(!buffer_uptodate(bh));
1334
1335 /*
1336 * If the ecc fails, we return the error but otherwise
1337 * leave the filesystem running. We know any error is
1338 * local to this block.
1339 */
1340 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1341 if (rc) {
1342 mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
1343 (unsigned long long)bh->b_blocknr);
1344 goto bail;
1345 }
1346
1347 /*
1348 * Errors after here are fatal.
1349 */
1350
1351 rc = -EINVAL;
1352
1353 if (!OCFS2_IS_VALID_DINODE(di)) {
1354 ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
1355 (unsigned long long)bh->b_blocknr, 7,
1356 di->i_signature);
1357 goto bail;
1358 }
1359
1360 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1361 ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
1362 (unsigned long long)bh->b_blocknr,
1363 (unsigned long long)le64_to_cpu(di->i_blkno));
1364 goto bail;
1365 }
1366
1367 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1368 ocfs2_error(sb,
1369 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
1370 (unsigned long long)bh->b_blocknr);
1371 goto bail;
1372 }
1373
1374 if (le32_to_cpu(di->i_fs_generation) !=
1375 OCFS2_SB(sb)->fs_generation) {
1376 ocfs2_error(sb,
1377 "Invalid dinode #%llu: fs_generation is %u\n",
1378 (unsigned long long)bh->b_blocknr,
1379 le32_to_cpu(di->i_fs_generation));
1380 goto bail;
1381 }
1382
1383 rc = 0;
1384
1385bail:
1386 return rc;
1387}
1388
1389int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
1390 int flags)
1391{
1392 int rc;
1393 struct buffer_head *tmp = *bh;
1394
1395 rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno,
1396 1, &tmp, flags, ocfs2_validate_inode_block);
1397
1398 /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1399 if (!rc && !*bh)
1400 *bh = tmp;
1401
1402 return rc;
1403}
1404
1405int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
1406{
1407 return ocfs2_read_inode_block_full(inode, bh, 0);
1408}
1409
1410
1411static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci)
1412{
1413 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1414
1415 return oi->ip_blkno;
1416}
1417
1418static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci)
1419{
1420 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1421
1422 return oi->vfs_inode.i_sb;
1423}
1424
1425static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
1426{
1427 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1428
1429 spin_lock(&oi->ip_lock);
1430}
1431
1432static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
1433{
1434 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1435
1436 spin_unlock(&oi->ip_lock);
1437}
1438
1439static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci)
1440{
1441 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1442
1443 mutex_lock(&oi->ip_io_mutex);
1444}
1445
1446static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci)
1447{
1448 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1449
1450 mutex_unlock(&oi->ip_io_mutex);
1451}
1452
1453const struct ocfs2_caching_operations ocfs2_inode_caching_ops = {
1454 .co_owner = ocfs2_inode_cache_owner,
1455 .co_get_super = ocfs2_inode_cache_get_super,
1456 .co_cache_lock = ocfs2_inode_cache_lock,
1457 .co_cache_unlock = ocfs2_inode_cache_unlock,
1458 .co_io_lock = ocfs2_inode_cache_io_lock,
1459 .co_io_unlock = ocfs2_inode_cache_io_unlock,
1460};
1461