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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
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
134 trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
135 sysfile_type);
136
137 /* Ok. By now we've either got the offsets passed to us by the
138 * caller, or we just pulled them off the bh. Lets do some
139 * sanity checks to make sure they're OK. */
140 if (blkno == 0) {
141 inode = ERR_PTR(-EINVAL);
142 mlog_errno(PTR_ERR(inode));
143 goto bail;
144 }
145
146 args.fi_blkno = blkno;
147 args.fi_flags = flags;
148 args.fi_ino = ino_from_blkno(sb, blkno);
149 args.fi_sysfile_type = sysfile_type;
150
151 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
152 ocfs2_init_locked_inode, &args);
153 /* inode was *not* in the inode cache. 2.6.x requires
154 * us to do our own read_inode call and unlock it
155 * afterwards. */
156 if (inode == NULL) {
157 inode = ERR_PTR(-ENOMEM);
158 mlog_errno(PTR_ERR(inode));
159 goto bail;
160 }
161 trace_ocfs2_iget5_locked(inode->i_state);
162 if (inode->i_state & I_NEW) {
163 ocfs2_read_locked_inode(inode, &args);
164 unlock_new_inode(inode);
165 }
166 if (is_bad_inode(inode)) {
167 iput(inode);
168 inode = ERR_PTR(-ESTALE);
169 goto bail;
170 }
171
172bail:
173 if (!IS_ERR(inode)) {
174 trace_ocfs2_iget_end(inode,
175 (unsigned long long)OCFS2_I(inode)->ip_blkno);
176 }
177
178 return inode;
179}
180
181
182/*
183 * here's how inodes get read from disk:
184 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
185 * found? : return the in-memory inode
186 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
187 */
188
189static int ocfs2_find_actor(struct inode *inode, void *opaque)
190{
191 struct ocfs2_find_inode_args *args = NULL;
192 struct ocfs2_inode_info *oi = OCFS2_I(inode);
193 int ret = 0;
194
195 args = opaque;
196
197 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
198
199 trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno);
200
201 if (oi->ip_blkno != args->fi_blkno)
202 goto bail;
203
204 ret = 1;
205bail:
206 return ret;
207}
208
209/*
210 * initialize the new inode, but don't do anything that would cause
211 * us to sleep.
212 * return 0 on success, 1 on failure
213 */
214static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
215{
216 struct ocfs2_find_inode_args *args = opaque;
217 static struct lock_class_key ocfs2_quota_ip_alloc_sem_key,
218 ocfs2_file_ip_alloc_sem_key;
219
220 inode->i_ino = args->fi_ino;
221 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
222 if (args->fi_sysfile_type != 0)
223 lockdep_set_class(&inode->i_mutex,
224 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
225 if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE ||
226 args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE ||
227 args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE ||
228 args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE)
229 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
230 &ocfs2_quota_ip_alloc_sem_key);
231 else
232 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
233 &ocfs2_file_ip_alloc_sem_key);
234
235 return 0;
236}
237
238void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
239 int create_ino)
240{
241 struct super_block *sb;
242 struct ocfs2_super *osb;
243 int use_plocks = 1;
244
245 sb = inode->i_sb;
246 osb = OCFS2_SB(sb);
247
248 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
249 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
250 use_plocks = 0;
251
252 /*
253 * These have all been checked by ocfs2_read_inode_block() or set
254 * by ocfs2_mknod_locked(), so a failure is a code bug.
255 */
256 BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode
257 cannot create a superblock
258 inode today. change if
259 that is needed. */
260 BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
261 BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
262
263
264 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
265 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
266 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
267
268 inode->i_version = 1;
269 inode->i_generation = le32_to_cpu(fe->i_generation);
270 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
271 inode->i_mode = le16_to_cpu(fe->i_mode);
272 inode->i_uid = le32_to_cpu(fe->i_uid);
273 inode->i_gid = le32_to_cpu(fe->i_gid);
274
275 /* Fast symlinks will have i_size but no allocated clusters. */
276 if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
277 inode->i_blocks = 0;
278 else
279 inode->i_blocks = ocfs2_inode_sector_count(inode);
280 inode->i_mapping->a_ops = &ocfs2_aops;
281 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
282 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
283 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
284 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
285 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
286 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
287
288 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
289 mlog(ML_ERROR,
290 "ip_blkno %llu != i_blkno %llu!\n",
291 (unsigned long long)OCFS2_I(inode)->ip_blkno,
292 (unsigned long long)le64_to_cpu(fe->i_blkno));
293
294 inode->i_nlink = ocfs2_read_links_count(fe);
295
296 trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
297 le32_to_cpu(fe->i_flags));
298 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
299 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
300 inode->i_flags |= S_NOQUOTA;
301 }
302
303 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
304 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
305 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
306 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
307 } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
308 inode->i_flags |= S_NOQUOTA;
309 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
310 /* we can't actually hit this as read_inode can't
311 * handle superblocks today ;-) */
312 BUG();
313 }
314
315 switch (inode->i_mode & S_IFMT) {
316 case S_IFREG:
317 if (use_plocks)
318 inode->i_fop = &ocfs2_fops;
319 else
320 inode->i_fop = &ocfs2_fops_no_plocks;
321 inode->i_op = &ocfs2_file_iops;
322 i_size_write(inode, le64_to_cpu(fe->i_size));
323 break;
324 case S_IFDIR:
325 inode->i_op = &ocfs2_dir_iops;
326 if (use_plocks)
327 inode->i_fop = &ocfs2_dops;
328 else
329 inode->i_fop = &ocfs2_dops_no_plocks;
330 i_size_write(inode, le64_to_cpu(fe->i_size));
331 OCFS2_I(inode)->ip_dir_lock_gen = 1;
332 break;
333 case S_IFLNK:
334 if (ocfs2_inode_is_fast_symlink(inode))
335 inode->i_op = &ocfs2_fast_symlink_inode_operations;
336 else
337 inode->i_op = &ocfs2_symlink_inode_operations;
338 i_size_write(inode, le64_to_cpu(fe->i_size));
339 break;
340 default:
341 inode->i_op = &ocfs2_special_file_iops;
342 init_special_inode(inode, inode->i_mode,
343 inode->i_rdev);
344 break;
345 }
346
347 if (create_ino) {
348 inode->i_ino = ino_from_blkno(inode->i_sb,
349 le64_to_cpu(fe->i_blkno));
350
351 /*
352 * If we ever want to create system files from kernel,
353 * the generation argument to
354 * ocfs2_inode_lock_res_init() will have to change.
355 */
356 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
357
358 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
359 OCFS2_LOCK_TYPE_META, 0, inode);
360
361 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
362 OCFS2_LOCK_TYPE_OPEN, 0, inode);
363 }
364
365 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
366 OCFS2_LOCK_TYPE_RW, inode->i_generation,
367 inode);
368
369 ocfs2_set_inode_flags(inode);
370
371 OCFS2_I(inode)->ip_last_used_slot = 0;
372 OCFS2_I(inode)->ip_last_used_group = 0;
373
374 if (S_ISDIR(inode->i_mode))
375 ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
376 OCFS2_RESV_FLAG_DIR);
377}
378
379static int ocfs2_read_locked_inode(struct inode *inode,
380 struct ocfs2_find_inode_args *args)
381{
382 struct super_block *sb;
383 struct ocfs2_super *osb;
384 struct ocfs2_dinode *fe;
385 struct buffer_head *bh = NULL;
386 int status, can_lock;
387 u32 generation = 0;
388
389 status = -EINVAL;
390 if (inode == NULL || inode->i_sb == NULL) {
391 mlog(ML_ERROR, "bad inode\n");
392 return status;
393 }
394 sb = inode->i_sb;
395 osb = OCFS2_SB(sb);
396
397 if (!args) {
398 mlog(ML_ERROR, "bad inode args\n");
399 make_bad_inode(inode);
400 return status;
401 }
402
403 /*
404 * To improve performance of cold-cache inode stats, we take
405 * the cluster lock here if possible.
406 *
407 * Generally, OCFS2 never trusts the contents of an inode
408 * unless it's holding a cluster lock, so taking it here isn't
409 * a correctness issue as much as it is a performance
410 * improvement.
411 *
412 * There are three times when taking the lock is not a good idea:
413 *
414 * 1) During startup, before we have initialized the DLM.
415 *
416 * 2) If we are reading certain system files which never get
417 * cluster locks (local alloc, truncate log).
418 *
419 * 3) If the process doing the iget() is responsible for
420 * orphan dir recovery. We're holding the orphan dir lock and
421 * can get into a deadlock with another process on another
422 * node in ->delete_inode().
423 *
424 * #1 and #2 can be simply solved by never taking the lock
425 * here for system files (which are the only type we read
426 * during mount). It's a heavier approach, but our main
427 * concern is user-accessible files anyway.
428 *
429 * #3 works itself out because we'll eventually take the
430 * cluster lock before trusting anything anyway.
431 */
432 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
433 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
434 && !ocfs2_mount_local(osb);
435
436 trace_ocfs2_read_locked_inode(
437 (unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock);
438
439 /*
440 * To maintain backwards compatibility with older versions of
441 * ocfs2-tools, we still store the generation value for system
442 * files. The only ones that actually matter to userspace are
443 * the journals, but it's easier and inexpensive to just flag
444 * all system files similarly.
445 */
446 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
447 generation = osb->fs_generation;
448
449 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
450 OCFS2_LOCK_TYPE_META,
451 generation, inode);
452
453 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
454 OCFS2_LOCK_TYPE_OPEN,
455 0, inode);
456
457 if (can_lock) {
458 status = ocfs2_open_lock(inode);
459 if (status) {
460 make_bad_inode(inode);
461 mlog_errno(status);
462 return status;
463 }
464 status = ocfs2_inode_lock(inode, NULL, 0);
465 if (status) {
466 make_bad_inode(inode);
467 mlog_errno(status);
468 return status;
469 }
470 }
471
472 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
473 status = ocfs2_try_open_lock(inode, 0);
474 if (status) {
475 make_bad_inode(inode);
476 return status;
477 }
478 }
479
480 if (can_lock) {
481 status = ocfs2_read_inode_block_full(inode, &bh,
482 OCFS2_BH_IGNORE_CACHE);
483 } else {
484 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
485 /*
486 * If buffer is in jbd, then its checksum may not have been
487 * computed as yet.
488 */
489 if (!status && !buffer_jbd(bh))
490 status = ocfs2_validate_inode_block(osb->sb, bh);
491 }
492 if (status < 0) {
493 mlog_errno(status);
494 goto bail;
495 }
496
497 status = -EINVAL;
498 fe = (struct ocfs2_dinode *) bh->b_data;
499
500 /*
501 * This is a code bug. Right now the caller needs to
502 * understand whether it is asking for a system file inode or
503 * not so the proper lock names can be built.
504 */
505 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
506 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
507 "Inode %llu: system file state is ambigous\n",
508 (unsigned long long)args->fi_blkno);
509
510 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
511 S_ISBLK(le16_to_cpu(fe->i_mode)))
512 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
513
514 ocfs2_populate_inode(inode, fe, 0);
515
516 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
517
518 status = 0;
519
520bail:
521 if (can_lock)
522 ocfs2_inode_unlock(inode, 0);
523
524 if (status < 0)
525 make_bad_inode(inode);
526
527 if (args && bh)
528 brelse(bh);
529
530 return status;
531}
532
533void ocfs2_sync_blockdev(struct super_block *sb)
534{
535 sync_blockdev(sb->s_bdev);
536}
537
538static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
539 struct inode *inode,
540 struct buffer_head *fe_bh)
541{
542 int status = 0;
543 struct ocfs2_dinode *fe;
544 handle_t *handle = NULL;
545
546 fe = (struct ocfs2_dinode *) fe_bh->b_data;
547
548 /*
549 * This check will also skip truncate of inodes with inline
550 * data and fast symlinks.
551 */
552 if (fe->i_clusters) {
553 if (ocfs2_should_order_data(inode))
554 ocfs2_begin_ordered_truncate(inode, 0);
555
556 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
557 if (IS_ERR(handle)) {
558 status = PTR_ERR(handle);
559 handle = NULL;
560 mlog_errno(status);
561 goto out;
562 }
563
564 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
565 fe_bh,
566 OCFS2_JOURNAL_ACCESS_WRITE);
567 if (status < 0) {
568 mlog_errno(status);
569 goto out;
570 }
571
572 i_size_write(inode, 0);
573
574 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
575 if (status < 0) {
576 mlog_errno(status);
577 goto out;
578 }
579
580 ocfs2_commit_trans(osb, handle);
581 handle = NULL;
582
583 status = ocfs2_commit_truncate(osb, inode, fe_bh);
584 if (status < 0) {
585 mlog_errno(status);
586 goto out;
587 }
588 }
589
590out:
591 if (handle)
592 ocfs2_commit_trans(osb, handle);
593 return status;
594}
595
596static int ocfs2_remove_inode(struct inode *inode,
597 struct buffer_head *di_bh,
598 struct inode *orphan_dir_inode,
599 struct buffer_head *orphan_dir_bh)
600{
601 int status;
602 struct inode *inode_alloc_inode = NULL;
603 struct buffer_head *inode_alloc_bh = NULL;
604 handle_t *handle;
605 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
606 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
607
608 inode_alloc_inode =
609 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
610 le16_to_cpu(di->i_suballoc_slot));
611 if (!inode_alloc_inode) {
612 status = -EEXIST;
613 mlog_errno(status);
614 goto bail;
615 }
616
617 mutex_lock(&inode_alloc_inode->i_mutex);
618 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
619 if (status < 0) {
620 mutex_unlock(&inode_alloc_inode->i_mutex);
621
622 mlog_errno(status);
623 goto bail;
624 }
625
626 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
627 ocfs2_quota_trans_credits(inode->i_sb));
628 if (IS_ERR(handle)) {
629 status = PTR_ERR(handle);
630 mlog_errno(status);
631 goto bail_unlock;
632 }
633
634 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
635 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
636 orphan_dir_bh);
637 if (status < 0) {
638 mlog_errno(status);
639 goto bail_commit;
640 }
641 }
642
643 /* set the inodes dtime */
644 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
645 OCFS2_JOURNAL_ACCESS_WRITE);
646 if (status < 0) {
647 mlog_errno(status);
648 goto bail_commit;
649 }
650
651 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
652 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
653 ocfs2_journal_dirty(handle, di_bh);
654
655 ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
656 dquot_free_inode(inode);
657
658 status = ocfs2_free_dinode(handle, inode_alloc_inode,
659 inode_alloc_bh, di);
660 if (status < 0)
661 mlog_errno(status);
662
663bail_commit:
664 ocfs2_commit_trans(osb, handle);
665bail_unlock:
666 ocfs2_inode_unlock(inode_alloc_inode, 1);
667 mutex_unlock(&inode_alloc_inode->i_mutex);
668 brelse(inode_alloc_bh);
669bail:
670 iput(inode_alloc_inode);
671
672 return status;
673}
674
675/*
676 * Serialize with orphan dir recovery. If the process doing
677 * recovery on this orphan dir does an iget() with the dir
678 * i_mutex held, we'll deadlock here. Instead we detect this
679 * and exit early - recovery will wipe this inode for us.
680 */
681static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
682 int slot)
683{
684 int ret = 0;
685
686 spin_lock(&osb->osb_lock);
687 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
688 ret = -EDEADLK;
689 goto out;
690 }
691 /* This signals to the orphan recovery process that it should
692 * wait for us to handle the wipe. */
693 osb->osb_orphan_wipes[slot]++;
694out:
695 spin_unlock(&osb->osb_lock);
696 trace_ocfs2_check_orphan_recovery_state(slot, ret);
697 return ret;
698}
699
700static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
701 int slot)
702{
703 spin_lock(&osb->osb_lock);
704 osb->osb_orphan_wipes[slot]--;
705 spin_unlock(&osb->osb_lock);
706
707 wake_up(&osb->osb_wipe_event);
708}
709
710static int ocfs2_wipe_inode(struct inode *inode,
711 struct buffer_head *di_bh)
712{
713 int status, orphaned_slot = -1;
714 struct inode *orphan_dir_inode = NULL;
715 struct buffer_head *orphan_dir_bh = NULL;
716 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
717 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
718
719 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
720 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
721
722 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
723 if (status)
724 return status;
725
726 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
727 ORPHAN_DIR_SYSTEM_INODE,
728 orphaned_slot);
729 if (!orphan_dir_inode) {
730 status = -EEXIST;
731 mlog_errno(status);
732 goto bail;
733 }
734
735 /* Lock the orphan dir. The lock will be held for the entire
736 * delete_inode operation. We do this now to avoid races with
737 * recovery completion on other nodes. */
738 mutex_lock(&orphan_dir_inode->i_mutex);
739 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
740 if (status < 0) {
741 mutex_unlock(&orphan_dir_inode->i_mutex);
742
743 mlog_errno(status);
744 goto bail;
745 }
746 }
747
748 /* we do this while holding the orphan dir lock because we
749 * don't want recovery being run from another node to try an
750 * inode delete underneath us -- this will result in two nodes
751 * truncating the same file! */
752 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
753 if (status < 0) {
754 mlog_errno(status);
755 goto bail_unlock_dir;
756 }
757
758 /* Remove any dir index tree */
759 if (S_ISDIR(inode->i_mode)) {
760 status = ocfs2_dx_dir_truncate(inode, di_bh);
761 if (status) {
762 mlog_errno(status);
763 goto bail_unlock_dir;
764 }
765 }
766
767 /*Free extended attribute resources associated with this inode.*/
768 status = ocfs2_xattr_remove(inode, di_bh);
769 if (status < 0) {
770 mlog_errno(status);
771 goto bail_unlock_dir;
772 }
773
774 status = ocfs2_remove_refcount_tree(inode, di_bh);
775 if (status < 0) {
776 mlog_errno(status);
777 goto bail_unlock_dir;
778 }
779
780 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
781 orphan_dir_bh);
782 if (status < 0)
783 mlog_errno(status);
784
785bail_unlock_dir:
786 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)
787 return status;
788
789 ocfs2_inode_unlock(orphan_dir_inode, 1);
790 mutex_unlock(&orphan_dir_inode->i_mutex);
791 brelse(orphan_dir_bh);
792bail:
793 iput(orphan_dir_inode);
794 ocfs2_signal_wipe_completion(osb, orphaned_slot);
795
796 return status;
797}
798
799/* There is a series of simple checks that should be done before a
800 * trylock is even considered. Encapsulate those in this function. */
801static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
802{
803 int ret = 0;
804 struct ocfs2_inode_info *oi = OCFS2_I(inode);
805 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
806
807 trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task,
808 (unsigned long long)oi->ip_blkno,
809 oi->ip_flags);
810
811 /* We shouldn't be getting here for the root directory
812 * inode.. */
813 if (inode == osb->root_inode) {
814 mlog(ML_ERROR, "Skipping delete of root inode.\n");
815 goto bail;
816 }
817
818 /* If we're coming from downconvert_thread we can't go into our own
819 * voting [hello, deadlock city!], so unforuntately we just
820 * have to skip deleting this guy. That's OK though because
821 * the node who's doing the actual deleting should handle it
822 * anyway. */
823 if (current == osb->dc_task)
824 goto bail;
825
826 spin_lock(&oi->ip_lock);
827 /* OCFS2 *never* deletes system files. This should technically
828 * never get here as system file inodes should always have a
829 * positive link count. */
830 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
831 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
832 (unsigned long long)oi->ip_blkno);
833 goto bail_unlock;
834 }
835
836 /* If we have allowd wipe of this inode for another node, it
837 * will be marked here so we can safely skip it. Recovery will
838 * cleanup any inodes we might inadvertently skip here. */
839 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE)
840 goto bail_unlock;
841
842 ret = 1;
843bail_unlock:
844 spin_unlock(&oi->ip_lock);
845bail:
846 return ret;
847}
848
849/* Query the cluster to determine whether we should wipe an inode from
850 * disk or not.
851 *
852 * Requires the inode to have the cluster lock. */
853static int ocfs2_query_inode_wipe(struct inode *inode,
854 struct buffer_head *di_bh,
855 int *wipe)
856{
857 int status = 0, reason = 0;
858 struct ocfs2_inode_info *oi = OCFS2_I(inode);
859 struct ocfs2_dinode *di;
860
861 *wipe = 0;
862
863 trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno,
864 inode->i_nlink);
865
866 /* While we were waiting for the cluster lock in
867 * ocfs2_delete_inode, another node might have asked to delete
868 * the inode. Recheck our flags to catch this. */
869 if (!ocfs2_inode_is_valid_to_delete(inode)) {
870 reason = 1;
871 goto bail;
872 }
873
874 /* Now that we have an up to date inode, we can double check
875 * the link count. */
876 if (inode->i_nlink)
877 goto bail;
878
879 /* Do some basic inode verification... */
880 di = (struct ocfs2_dinode *) di_bh->b_data;
881 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) &&
882 !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
883 /*
884 * Inodes in the orphan dir must have ORPHANED_FL. The only
885 * inodes that come back out of the orphan dir are reflink
886 * targets. A reflink target may be moved out of the orphan
887 * dir between the time we scan the directory and the time we
888 * process it. This would lead to HAS_REFCOUNT_FL being set but
889 * ORPHANED_FL not.
890 */
891 if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) {
892 reason = 2;
893 goto bail;
894 }
895
896 /* for lack of a better error? */
897 status = -EEXIST;
898 mlog(ML_ERROR,
899 "Inode %llu (on-disk %llu) not orphaned! "
900 "Disk flags 0x%x, inode flags 0x%x\n",
901 (unsigned long long)oi->ip_blkno,
902 (unsigned long long)le64_to_cpu(di->i_blkno),
903 le32_to_cpu(di->i_flags), oi->ip_flags);
904 goto bail;
905 }
906
907 /* has someone already deleted us?! baaad... */
908 if (di->i_dtime) {
909 status = -EEXIST;
910 mlog_errno(status);
911 goto bail;
912 }
913
914 /*
915 * This is how ocfs2 determines whether an inode is still live
916 * within the cluster. Every node takes a shared read lock on
917 * the inode open lock in ocfs2_read_locked_inode(). When we
918 * get to ->delete_inode(), each node tries to convert it's
919 * lock to an exclusive. Trylocks are serialized by the inode
920 * meta data lock. If the upconvert succeeds, we know the inode
921 * is no longer live and can be deleted.
922 *
923 * Though we call this with the meta data lock held, the
924 * trylock keeps us from ABBA deadlock.
925 */
926 status = ocfs2_try_open_lock(inode, 1);
927 if (status == -EAGAIN) {
928 status = 0;
929 reason = 3;
930 goto bail;
931 }
932 if (status < 0) {
933 mlog_errno(status);
934 goto bail;
935 }
936
937 *wipe = 1;
938 trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot));
939
940bail:
941 trace_ocfs2_query_inode_wipe_end(status, reason);
942 return status;
943}
944
945/* Support function for ocfs2_delete_inode. Will help us keep the
946 * inode data in a consistent state for clear_inode. Always truncates
947 * pages, optionally sync's them first. */
948static void ocfs2_cleanup_delete_inode(struct inode *inode,
949 int sync_data)
950{
951 trace_ocfs2_cleanup_delete_inode(
952 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
953 if (sync_data)
954 write_inode_now(inode, 1);
955 truncate_inode_pages(&inode->i_data, 0);
956}
957
958static void ocfs2_delete_inode(struct inode *inode)
959{
960 int wipe, status;
961 sigset_t oldset;
962 struct buffer_head *di_bh = NULL;
963
964 trace_ocfs2_delete_inode(inode->i_ino,
965 (unsigned long long)OCFS2_I(inode)->ip_blkno,
966 is_bad_inode(inode));
967
968 /* When we fail in read_inode() we mark inode as bad. The second test
969 * catches the case when inode allocation fails before allocating
970 * a block for inode. */
971 if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno)
972 goto bail;
973
974 dquot_initialize(inode);
975
976 if (!ocfs2_inode_is_valid_to_delete(inode)) {
977 /* It's probably not necessary to truncate_inode_pages
978 * here but we do it for safety anyway (it will most
979 * likely be a no-op anyway) */
980 ocfs2_cleanup_delete_inode(inode, 0);
981 goto bail;
982 }
983
984 /* We want to block signals in delete_inode as the lock and
985 * messaging paths may return us -ERESTARTSYS. Which would
986 * cause us to exit early, resulting in inodes being orphaned
987 * forever. */
988 ocfs2_block_signals(&oldset);
989
990 /*
991 * Synchronize us against ocfs2_get_dentry. We take this in
992 * shared mode so that all nodes can still concurrently
993 * process deletes.
994 */
995 status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0);
996 if (status < 0) {
997 mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status);
998 ocfs2_cleanup_delete_inode(inode, 0);
999 goto bail_unblock;
1000 }
1001 /* Lock down the inode. This gives us an up to date view of
1002 * it's metadata (for verification), and allows us to
1003 * serialize delete_inode on multiple nodes.
1004 *
1005 * Even though we might be doing a truncate, we don't take the
1006 * allocation lock here as it won't be needed - nobody will
1007 * have the file open.
1008 */
1009 status = ocfs2_inode_lock(inode, &di_bh, 1);
1010 if (status < 0) {
1011 if (status != -ENOENT)
1012 mlog_errno(status);
1013 ocfs2_cleanup_delete_inode(inode, 0);
1014 goto bail_unlock_nfs_sync;
1015 }
1016
1017 /* Query the cluster. This will be the final decision made
1018 * before we go ahead and wipe the inode. */
1019 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
1020 if (!wipe || status < 0) {
1021 /* Error and remote inode busy both mean we won't be
1022 * removing the inode, so they take almost the same
1023 * path. */
1024 if (status < 0)
1025 mlog_errno(status);
1026
1027 /* Someone in the cluster has disallowed a wipe of
1028 * this inode, or it was never completely
1029 * orphaned. Write out the pages and exit now. */
1030 ocfs2_cleanup_delete_inode(inode, 1);
1031 goto bail_unlock_inode;
1032 }
1033
1034 ocfs2_cleanup_delete_inode(inode, 0);
1035
1036 status = ocfs2_wipe_inode(inode, di_bh);
1037 if (status < 0) {
1038 if (status != -EDEADLK)
1039 mlog_errno(status);
1040 goto bail_unlock_inode;
1041 }
1042
1043 /*
1044 * Mark the inode as successfully deleted.
1045 *
1046 * This is important for ocfs2_clear_inode() as it will check
1047 * this flag and skip any checkpointing work
1048 *
1049 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1050 * the LVB for other nodes.
1051 */
1052 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
1053
1054bail_unlock_inode:
1055 ocfs2_inode_unlock(inode, 1);
1056 brelse(di_bh);
1057
1058bail_unlock_nfs_sync:
1059 ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0);
1060
1061bail_unblock:
1062 ocfs2_unblock_signals(&oldset);
1063bail:
1064 return;
1065}
1066
1067static void ocfs2_clear_inode(struct inode *inode)
1068{
1069 int status;
1070 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1071
1072 end_writeback(inode);
1073 trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno,
1074 inode->i_nlink);
1075
1076 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1077 "Inode=%lu\n", inode->i_ino);
1078
1079 dquot_drop(inode);
1080
1081 /* To preven remote deletes we hold open lock before, now it
1082 * is time to unlock PR and EX open locks. */
1083 ocfs2_open_unlock(inode);
1084
1085 /* Do these before all the other work so that we don't bounce
1086 * the downconvert thread while waiting to destroy the locks. */
1087 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
1088 ocfs2_mark_lockres_freeing(&oi->ip_inode_lockres);
1089 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
1090
1091 ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap,
1092 &oi->ip_la_data_resv);
1093 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1094
1095 /* We very well may get a clear_inode before all an inodes
1096 * metadata has hit disk. Of course, we can't drop any cluster
1097 * locks until the journal has finished with it. The only
1098 * exception here are successfully wiped inodes - their
1099 * metadata can now be considered to be part of the system
1100 * inodes from which it came. */
1101 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1102 ocfs2_checkpoint_inode(inode);
1103
1104 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1105 "Clear inode of %llu, inode has io markers\n",
1106 (unsigned long long)oi->ip_blkno);
1107
1108 ocfs2_extent_map_trunc(inode, 0);
1109
1110 status = ocfs2_drop_inode_locks(inode);
1111 if (status < 0)
1112 mlog_errno(status);
1113
1114 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1115 ocfs2_lock_res_free(&oi->ip_inode_lockres);
1116 ocfs2_lock_res_free(&oi->ip_open_lockres);
1117
1118 ocfs2_metadata_cache_exit(INODE_CACHE(inode));
1119
1120 mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
1121 "Clear inode of %llu, inode has %u cache items\n",
1122 (unsigned long long)oi->ip_blkno,
1123 INODE_CACHE(inode)->ci_num_cached);
1124
1125 mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE),
1126 "Clear inode of %llu, inode has a bad flag\n",
1127 (unsigned long long)oi->ip_blkno);
1128
1129 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1130 "Clear inode of %llu, inode is locked\n",
1131 (unsigned long long)oi->ip_blkno);
1132
1133 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1134 "Clear inode of %llu, io_mutex is locked\n",
1135 (unsigned long long)oi->ip_blkno);
1136 mutex_unlock(&oi->ip_io_mutex);
1137
1138 /*
1139 * down_trylock() returns 0, down_write_trylock() returns 1
1140 * kernel 1, world 0
1141 */
1142 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1143 "Clear inode of %llu, alloc_sem is locked\n",
1144 (unsigned long long)oi->ip_blkno);
1145 up_write(&oi->ip_alloc_sem);
1146
1147 mlog_bug_on_msg(oi->ip_open_count,
1148 "Clear inode of %llu has open count %d\n",
1149 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1150
1151 /* Clear all other flags. */
1152 oi->ip_flags = 0;
1153 oi->ip_dir_start_lookup = 0;
1154 oi->ip_blkno = 0ULL;
1155
1156 /*
1157 * ip_jinode is used to track txns against this inode. We ensure that
1158 * the journal is flushed before journal shutdown. Thus it is safe to
1159 * have inodes get cleaned up after journal shutdown.
1160 */
1161 jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
1162 &oi->ip_jinode);
1163}
1164
1165void ocfs2_evict_inode(struct inode *inode)
1166{
1167 if (!inode->i_nlink ||
1168 (OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) {
1169 ocfs2_delete_inode(inode);
1170 } else {
1171 truncate_inode_pages(&inode->i_data, 0);
1172 }
1173 ocfs2_clear_inode(inode);
1174}
1175
1176/* Called under inode_lock, with no more references on the
1177 * struct inode, so it's safe here to check the flags field
1178 * and to manipulate i_nlink without any other locks. */
1179int ocfs2_drop_inode(struct inode *inode)
1180{
1181 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1182 int res;
1183
1184 trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno,
1185 inode->i_nlink, oi->ip_flags);
1186
1187 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1188 res = 1;
1189 else
1190 res = generic_drop_inode(inode);
1191
1192 return res;
1193}
1194
1195/*
1196 * This is called from our getattr.
1197 */
1198int ocfs2_inode_revalidate(struct dentry *dentry)
1199{
1200 struct inode *inode = dentry->d_inode;
1201 int status = 0;
1202
1203 trace_ocfs2_inode_revalidate(inode,
1204 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL,
1205 inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0);
1206
1207 if (!inode) {
1208 status = -ENOENT;
1209 goto bail;
1210 }
1211
1212 spin_lock(&OCFS2_I(inode)->ip_lock);
1213 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1214 spin_unlock(&OCFS2_I(inode)->ip_lock);
1215 status = -ENOENT;
1216 goto bail;
1217 }
1218 spin_unlock(&OCFS2_I(inode)->ip_lock);
1219
1220 /* Let ocfs2_inode_lock do the work of updating our struct
1221 * inode for us. */
1222 status = ocfs2_inode_lock(inode, NULL, 0);
1223 if (status < 0) {
1224 if (status != -ENOENT)
1225 mlog_errno(status);
1226 goto bail;
1227 }
1228 ocfs2_inode_unlock(inode, 0);
1229bail:
1230 return status;
1231}
1232
1233/*
1234 * Updates a disk inode from a
1235 * struct inode.
1236 * Only takes ip_lock.
1237 */
1238int ocfs2_mark_inode_dirty(handle_t *handle,
1239 struct inode *inode,
1240 struct buffer_head *bh)
1241{
1242 int status;
1243 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1244
1245 trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno);
1246
1247 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1248 OCFS2_JOURNAL_ACCESS_WRITE);
1249 if (status < 0) {
1250 mlog_errno(status);
1251 goto leave;
1252 }
1253
1254 spin_lock(&OCFS2_I(inode)->ip_lock);
1255 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1256 ocfs2_get_inode_flags(OCFS2_I(inode));
1257 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1258 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1259 spin_unlock(&OCFS2_I(inode)->ip_lock);
1260
1261 fe->i_size = cpu_to_le64(i_size_read(inode));
1262 ocfs2_set_links_count(fe, inode->i_nlink);
1263 fe->i_uid = cpu_to_le32(inode->i_uid);
1264 fe->i_gid = cpu_to_le32(inode->i_gid);
1265 fe->i_mode = cpu_to_le16(inode->i_mode);
1266 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1267 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1268 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1269 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1270 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1271 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1272
1273 ocfs2_journal_dirty(handle, bh);
1274leave:
1275 return status;
1276}
1277
1278/*
1279 *
1280 * Updates a struct inode from a disk inode.
1281 * does no i/o, only takes ip_lock.
1282 */
1283void ocfs2_refresh_inode(struct inode *inode,
1284 struct ocfs2_dinode *fe)
1285{
1286 spin_lock(&OCFS2_I(inode)->ip_lock);
1287
1288 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1289 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1290 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1291 ocfs2_set_inode_flags(inode);
1292 i_size_write(inode, le64_to_cpu(fe->i_size));
1293 inode->i_nlink = ocfs2_read_links_count(fe);
1294 inode->i_uid = le32_to_cpu(fe->i_uid);
1295 inode->i_gid = le32_to_cpu(fe->i_gid);
1296 inode->i_mode = le16_to_cpu(fe->i_mode);
1297 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1298 inode->i_blocks = 0;
1299 else
1300 inode->i_blocks = ocfs2_inode_sector_count(inode);
1301 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1302 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1303 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1304 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1305 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1306 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1307
1308 spin_unlock(&OCFS2_I(inode)->ip_lock);
1309}
1310
1311int ocfs2_validate_inode_block(struct super_block *sb,
1312 struct buffer_head *bh)
1313{
1314 int rc;
1315 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1316
1317 trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr);
1318
1319 BUG_ON(!buffer_uptodate(bh));
1320
1321 /*
1322 * If the ecc fails, we return the error but otherwise
1323 * leave the filesystem running. We know any error is
1324 * local to this block.
1325 */
1326 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1327 if (rc) {
1328 mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
1329 (unsigned long long)bh->b_blocknr);
1330 goto bail;
1331 }
1332
1333 /*
1334 * Errors after here are fatal.
1335 */
1336
1337 rc = -EINVAL;
1338
1339 if (!OCFS2_IS_VALID_DINODE(di)) {
1340 ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
1341 (unsigned long long)bh->b_blocknr, 7,
1342 di->i_signature);
1343 goto bail;
1344 }
1345
1346 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1347 ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
1348 (unsigned long long)bh->b_blocknr,
1349 (unsigned long long)le64_to_cpu(di->i_blkno));
1350 goto bail;
1351 }
1352
1353 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1354 ocfs2_error(sb,
1355 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
1356 (unsigned long long)bh->b_blocknr);
1357 goto bail;
1358 }
1359
1360 if (le32_to_cpu(di->i_fs_generation) !=
1361 OCFS2_SB(sb)->fs_generation) {
1362 ocfs2_error(sb,
1363 "Invalid dinode #%llu: fs_generation is %u\n",
1364 (unsigned long long)bh->b_blocknr,
1365 le32_to_cpu(di->i_fs_generation));
1366 goto bail;
1367 }
1368
1369 rc = 0;
1370
1371bail:
1372 return rc;
1373}
1374
1375int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
1376 int flags)
1377{
1378 int rc;
1379 struct buffer_head *tmp = *bh;
1380
1381 rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno,
1382 1, &tmp, flags, ocfs2_validate_inode_block);
1383
1384 /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1385 if (!rc && !*bh)
1386 *bh = tmp;
1387
1388 return rc;
1389}
1390
1391int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
1392{
1393 return ocfs2_read_inode_block_full(inode, bh, 0);
1394}
1395
1396
1397static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci)
1398{
1399 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1400
1401 return oi->ip_blkno;
1402}
1403
1404static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci)
1405{
1406 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1407
1408 return oi->vfs_inode.i_sb;
1409}
1410
1411static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
1412{
1413 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1414
1415 spin_lock(&oi->ip_lock);
1416}
1417
1418static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
1419{
1420 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1421
1422 spin_unlock(&oi->ip_lock);
1423}
1424
1425static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci)
1426{
1427 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1428
1429 mutex_lock(&oi->ip_io_mutex);
1430}
1431
1432static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci)
1433{
1434 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1435
1436 mutex_unlock(&oi->ip_io_mutex);
1437}
1438
1439const struct ocfs2_caching_operations ocfs2_inode_caching_ops = {
1440 .co_owner = ocfs2_inode_cache_owner,
1441 .co_get_super = ocfs2_inode_cache_get_super,
1442 .co_cache_lock = ocfs2_inode_cache_lock,
1443 .co_cache_unlock = ocfs2_inode_cache_unlock,
1444 .co_io_lock = ocfs2_inode_cache_io_lock,
1445 .co_io_unlock = ocfs2_inode_cache_io_unlock,
1446};
1447
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * inode.c
4 *
5 * vfs' aops, fops, dops and iops
6 *
7 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
8 */
9
10#include <linux/fs.h>
11#include <linux/types.h>
12#include <linux/highmem.h>
13#include <linux/pagemap.h>
14#include <linux/quotaops.h>
15#include <linux/iversion.h>
16
17#include <asm/byteorder.h>
18
19#include <cluster/masklog.h>
20
21#include "ocfs2.h"
22
23#include "alloc.h"
24#include "dir.h"
25#include "blockcheck.h"
26#include "dlmglue.h"
27#include "extent_map.h"
28#include "file.h"
29#include "heartbeat.h"
30#include "inode.h"
31#include "journal.h"
32#include "namei.h"
33#include "suballoc.h"
34#include "super.h"
35#include "symlink.h"
36#include "sysfile.h"
37#include "uptodate.h"
38#include "xattr.h"
39#include "refcounttree.h"
40#include "ocfs2_trace.h"
41#include "filecheck.h"
42
43#include "buffer_head_io.h"
44
45struct ocfs2_find_inode_args
46{
47 u64 fi_blkno;
48 unsigned long fi_ino;
49 unsigned int fi_flags;
50 unsigned int fi_sysfile_type;
51};
52
53static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
54
55static int ocfs2_read_locked_inode(struct inode *inode,
56 struct ocfs2_find_inode_args *args);
57static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
58static int ocfs2_find_actor(struct inode *inode, void *opaque);
59static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
60 struct inode *inode,
61 struct buffer_head *fe_bh);
62
63static int ocfs2_filecheck_read_inode_block_full(struct inode *inode,
64 struct buffer_head **bh,
65 int flags, int type);
66static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
67 struct buffer_head *bh);
68static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
69 struct buffer_head *bh);
70
71void ocfs2_set_inode_flags(struct inode *inode)
72{
73 unsigned int flags = OCFS2_I(inode)->ip_attr;
74
75 inode->i_flags &= ~(S_IMMUTABLE |
76 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
77
78 if (flags & OCFS2_IMMUTABLE_FL)
79 inode->i_flags |= S_IMMUTABLE;
80
81 if (flags & OCFS2_SYNC_FL)
82 inode->i_flags |= S_SYNC;
83 if (flags & OCFS2_APPEND_FL)
84 inode->i_flags |= S_APPEND;
85 if (flags & OCFS2_NOATIME_FL)
86 inode->i_flags |= S_NOATIME;
87 if (flags & OCFS2_DIRSYNC_FL)
88 inode->i_flags |= S_DIRSYNC;
89}
90
91/* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
92void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
93{
94 unsigned int flags = oi->vfs_inode.i_flags;
95
96 oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
97 OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
98 if (flags & S_SYNC)
99 oi->ip_attr |= OCFS2_SYNC_FL;
100 if (flags & S_APPEND)
101 oi->ip_attr |= OCFS2_APPEND_FL;
102 if (flags & S_IMMUTABLE)
103 oi->ip_attr |= OCFS2_IMMUTABLE_FL;
104 if (flags & S_NOATIME)
105 oi->ip_attr |= OCFS2_NOATIME_FL;
106 if (flags & S_DIRSYNC)
107 oi->ip_attr |= OCFS2_DIRSYNC_FL;
108}
109
110struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno)
111{
112 struct ocfs2_find_inode_args args;
113
114 args.fi_blkno = blkno;
115 args.fi_flags = 0;
116 args.fi_ino = ino_from_blkno(sb, blkno);
117 args.fi_sysfile_type = 0;
118
119 return ilookup5(sb, blkno, ocfs2_find_actor, &args);
120}
121struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
122 int sysfile_type)
123{
124 int rc = -ESTALE;
125 struct inode *inode = NULL;
126 struct super_block *sb = osb->sb;
127 struct ocfs2_find_inode_args args;
128 journal_t *journal = osb->journal->j_journal;
129
130 trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
131 sysfile_type);
132
133 /* Ok. By now we've either got the offsets passed to us by the
134 * caller, or we just pulled them off the bh. Lets do some
135 * sanity checks to make sure they're OK. */
136 if (blkno == 0) {
137 inode = ERR_PTR(-EINVAL);
138 mlog_errno(PTR_ERR(inode));
139 goto bail;
140 }
141
142 args.fi_blkno = blkno;
143 args.fi_flags = flags;
144 args.fi_ino = ino_from_blkno(sb, blkno);
145 args.fi_sysfile_type = sysfile_type;
146
147 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
148 ocfs2_init_locked_inode, &args);
149 /* inode was *not* in the inode cache. 2.6.x requires
150 * us to do our own read_inode call and unlock it
151 * afterwards. */
152 if (inode == NULL) {
153 inode = ERR_PTR(-ENOMEM);
154 mlog_errno(PTR_ERR(inode));
155 goto bail;
156 }
157 trace_ocfs2_iget5_locked(inode->i_state);
158 if (inode->i_state & I_NEW) {
159 rc = ocfs2_read_locked_inode(inode, &args);
160 unlock_new_inode(inode);
161 }
162 if (is_bad_inode(inode)) {
163 iput(inode);
164 inode = ERR_PTR(rc);
165 goto bail;
166 }
167
168 /*
169 * Set transaction id's of transactions that have to be committed
170 * to finish f[data]sync. We set them to currently running transaction
171 * as we cannot be sure that the inode or some of its metadata isn't
172 * part of the transaction - the inode could have been reclaimed and
173 * now it is reread from disk.
174 */
175 if (journal) {
176 transaction_t *transaction;
177 tid_t tid;
178 struct ocfs2_inode_info *oi = OCFS2_I(inode);
179
180 read_lock(&journal->j_state_lock);
181 if (journal->j_running_transaction)
182 transaction = journal->j_running_transaction;
183 else
184 transaction = journal->j_committing_transaction;
185 if (transaction)
186 tid = transaction->t_tid;
187 else
188 tid = journal->j_commit_sequence;
189 read_unlock(&journal->j_state_lock);
190 oi->i_sync_tid = tid;
191 oi->i_datasync_tid = tid;
192 }
193
194bail:
195 if (!IS_ERR(inode)) {
196 trace_ocfs2_iget_end(inode,
197 (unsigned long long)OCFS2_I(inode)->ip_blkno);
198 }
199
200 return inode;
201}
202
203
204/*
205 * here's how inodes get read from disk:
206 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
207 * found? : return the in-memory inode
208 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
209 */
210
211static int ocfs2_find_actor(struct inode *inode, void *opaque)
212{
213 struct ocfs2_find_inode_args *args = NULL;
214 struct ocfs2_inode_info *oi = OCFS2_I(inode);
215 int ret = 0;
216
217 args = opaque;
218
219 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
220
221 trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno);
222
223 if (oi->ip_blkno != args->fi_blkno)
224 goto bail;
225
226 ret = 1;
227bail:
228 return ret;
229}
230
231/*
232 * initialize the new inode, but don't do anything that would cause
233 * us to sleep.
234 * return 0 on success, 1 on failure
235 */
236static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
237{
238 struct ocfs2_find_inode_args *args = opaque;
239 static struct lock_class_key ocfs2_quota_ip_alloc_sem_key,
240 ocfs2_file_ip_alloc_sem_key;
241
242 inode->i_ino = args->fi_ino;
243 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
244 if (args->fi_sysfile_type != 0)
245 lockdep_set_class(&inode->i_rwsem,
246 &ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
247 if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE ||
248 args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE ||
249 args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE ||
250 args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE)
251 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
252 &ocfs2_quota_ip_alloc_sem_key);
253 else
254 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
255 &ocfs2_file_ip_alloc_sem_key);
256
257 return 0;
258}
259
260void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
261 int create_ino)
262{
263 struct super_block *sb;
264 struct ocfs2_super *osb;
265 int use_plocks = 1;
266
267 sb = inode->i_sb;
268 osb = OCFS2_SB(sb);
269
270 if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
271 ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
272 use_plocks = 0;
273
274 /*
275 * These have all been checked by ocfs2_read_inode_block() or set
276 * by ocfs2_mknod_locked(), so a failure is a code bug.
277 */
278 BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode
279 cannot create a superblock
280 inode today. change if
281 that is needed. */
282 BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
283 BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
284
285
286 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
287 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
288 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
289
290 inode_set_iversion(inode, 1);
291 inode->i_generation = le32_to_cpu(fe->i_generation);
292 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
293 inode->i_mode = le16_to_cpu(fe->i_mode);
294 i_uid_write(inode, le32_to_cpu(fe->i_uid));
295 i_gid_write(inode, le32_to_cpu(fe->i_gid));
296
297 /* Fast symlinks will have i_size but no allocated clusters. */
298 if (S_ISLNK(inode->i_mode) && !fe->i_clusters) {
299 inode->i_blocks = 0;
300 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
301 } else {
302 inode->i_blocks = ocfs2_inode_sector_count(inode);
303 inode->i_mapping->a_ops = &ocfs2_aops;
304 }
305 inode_set_atime(inode, le64_to_cpu(fe->i_atime),
306 le32_to_cpu(fe->i_atime_nsec));
307 inode_set_mtime(inode, le64_to_cpu(fe->i_mtime),
308 le32_to_cpu(fe->i_mtime_nsec));
309 inode_set_ctime(inode, le64_to_cpu(fe->i_ctime),
310 le32_to_cpu(fe->i_ctime_nsec));
311
312 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
313 mlog(ML_ERROR,
314 "ip_blkno %llu != i_blkno %llu!\n",
315 (unsigned long long)OCFS2_I(inode)->ip_blkno,
316 (unsigned long long)le64_to_cpu(fe->i_blkno));
317
318 set_nlink(inode, ocfs2_read_links_count(fe));
319
320 trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
321 le32_to_cpu(fe->i_flags));
322 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
323 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
324 inode->i_flags |= S_NOQUOTA;
325 }
326
327 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
328 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
329 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
330 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
331 } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
332 inode->i_flags |= S_NOQUOTA;
333 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
334 /* we can't actually hit this as read_inode can't
335 * handle superblocks today ;-) */
336 BUG();
337 }
338
339 switch (inode->i_mode & S_IFMT) {
340 case S_IFREG:
341 if (use_plocks)
342 inode->i_fop = &ocfs2_fops;
343 else
344 inode->i_fop = &ocfs2_fops_no_plocks;
345 inode->i_op = &ocfs2_file_iops;
346 i_size_write(inode, le64_to_cpu(fe->i_size));
347 break;
348 case S_IFDIR:
349 inode->i_op = &ocfs2_dir_iops;
350 if (use_plocks)
351 inode->i_fop = &ocfs2_dops;
352 else
353 inode->i_fop = &ocfs2_dops_no_plocks;
354 i_size_write(inode, le64_to_cpu(fe->i_size));
355 OCFS2_I(inode)->ip_dir_lock_gen = 1;
356 break;
357 case S_IFLNK:
358 inode->i_op = &ocfs2_symlink_inode_operations;
359 inode_nohighmem(inode);
360 i_size_write(inode, le64_to_cpu(fe->i_size));
361 break;
362 default:
363 inode->i_op = &ocfs2_special_file_iops;
364 init_special_inode(inode, inode->i_mode,
365 inode->i_rdev);
366 break;
367 }
368
369 if (create_ino) {
370 inode->i_ino = ino_from_blkno(inode->i_sb,
371 le64_to_cpu(fe->i_blkno));
372
373 /*
374 * If we ever want to create system files from kernel,
375 * the generation argument to
376 * ocfs2_inode_lock_res_init() will have to change.
377 */
378 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
379
380 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
381 OCFS2_LOCK_TYPE_META, 0, inode);
382
383 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
384 OCFS2_LOCK_TYPE_OPEN, 0, inode);
385 }
386
387 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
388 OCFS2_LOCK_TYPE_RW, inode->i_generation,
389 inode);
390
391 ocfs2_set_inode_flags(inode);
392
393 OCFS2_I(inode)->ip_last_used_slot = 0;
394 OCFS2_I(inode)->ip_last_used_group = 0;
395
396 if (S_ISDIR(inode->i_mode))
397 ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
398 OCFS2_RESV_FLAG_DIR);
399}
400
401static int ocfs2_read_locked_inode(struct inode *inode,
402 struct ocfs2_find_inode_args *args)
403{
404 struct super_block *sb;
405 struct ocfs2_super *osb;
406 struct ocfs2_dinode *fe;
407 struct buffer_head *bh = NULL;
408 int status, can_lock, lock_level = 0;
409 u32 generation = 0;
410
411 status = -EINVAL;
412 sb = inode->i_sb;
413 osb = OCFS2_SB(sb);
414
415 /*
416 * To improve performance of cold-cache inode stats, we take
417 * the cluster lock here if possible.
418 *
419 * Generally, OCFS2 never trusts the contents of an inode
420 * unless it's holding a cluster lock, so taking it here isn't
421 * a correctness issue as much as it is a performance
422 * improvement.
423 *
424 * There are three times when taking the lock is not a good idea:
425 *
426 * 1) During startup, before we have initialized the DLM.
427 *
428 * 2) If we are reading certain system files which never get
429 * cluster locks (local alloc, truncate log).
430 *
431 * 3) If the process doing the iget() is responsible for
432 * orphan dir recovery. We're holding the orphan dir lock and
433 * can get into a deadlock with another process on another
434 * node in ->delete_inode().
435 *
436 * #1 and #2 can be simply solved by never taking the lock
437 * here for system files (which are the only type we read
438 * during mount). It's a heavier approach, but our main
439 * concern is user-accessible files anyway.
440 *
441 * #3 works itself out because we'll eventually take the
442 * cluster lock before trusting anything anyway.
443 */
444 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
445 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
446 && !ocfs2_mount_local(osb);
447
448 trace_ocfs2_read_locked_inode(
449 (unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock);
450
451 /*
452 * To maintain backwards compatibility with older versions of
453 * ocfs2-tools, we still store the generation value for system
454 * files. The only ones that actually matter to userspace are
455 * the journals, but it's easier and inexpensive to just flag
456 * all system files similarly.
457 */
458 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
459 generation = osb->fs_generation;
460
461 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
462 OCFS2_LOCK_TYPE_META,
463 generation, inode);
464
465 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
466 OCFS2_LOCK_TYPE_OPEN,
467 0, inode);
468
469 if (can_lock) {
470 status = ocfs2_open_lock(inode);
471 if (status) {
472 make_bad_inode(inode);
473 mlog_errno(status);
474 return status;
475 }
476 status = ocfs2_inode_lock(inode, NULL, lock_level);
477 if (status) {
478 make_bad_inode(inode);
479 mlog_errno(status);
480 return status;
481 }
482 }
483
484 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
485 status = ocfs2_try_open_lock(inode, 0);
486 if (status) {
487 make_bad_inode(inode);
488 return status;
489 }
490 }
491
492 if (can_lock) {
493 if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
494 status = ocfs2_filecheck_read_inode_block_full(inode,
495 &bh, OCFS2_BH_IGNORE_CACHE, 0);
496 else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
497 status = ocfs2_filecheck_read_inode_block_full(inode,
498 &bh, OCFS2_BH_IGNORE_CACHE, 1);
499 else
500 status = ocfs2_read_inode_block_full(inode,
501 &bh, OCFS2_BH_IGNORE_CACHE);
502 } else {
503 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
504 /*
505 * If buffer is in jbd, then its checksum may not have been
506 * computed as yet.
507 */
508 if (!status && !buffer_jbd(bh)) {
509 if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
510 status = ocfs2_filecheck_validate_inode_block(
511 osb->sb, bh);
512 else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
513 status = ocfs2_filecheck_repair_inode_block(
514 osb->sb, bh);
515 else
516 status = ocfs2_validate_inode_block(
517 osb->sb, bh);
518 }
519 }
520 if (status < 0) {
521 mlog_errno(status);
522 goto bail;
523 }
524
525 status = -EINVAL;
526 fe = (struct ocfs2_dinode *) bh->b_data;
527
528 /*
529 * This is a code bug. Right now the caller needs to
530 * understand whether it is asking for a system file inode or
531 * not so the proper lock names can be built.
532 */
533 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
534 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
535 "Inode %llu: system file state is ambiguous\n",
536 (unsigned long long)args->fi_blkno);
537
538 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
539 S_ISBLK(le16_to_cpu(fe->i_mode)))
540 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
541
542 ocfs2_populate_inode(inode, fe, 0);
543
544 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
545
546 if (buffer_dirty(bh) && !buffer_jbd(bh)) {
547 if (can_lock) {
548 ocfs2_inode_unlock(inode, lock_level);
549 lock_level = 1;
550 ocfs2_inode_lock(inode, NULL, lock_level);
551 }
552 status = ocfs2_write_block(osb, bh, INODE_CACHE(inode));
553 if (status < 0) {
554 mlog_errno(status);
555 goto bail;
556 }
557 }
558
559 status = 0;
560
561bail:
562 if (can_lock)
563 ocfs2_inode_unlock(inode, lock_level);
564
565 if (status < 0)
566 make_bad_inode(inode);
567
568 brelse(bh);
569
570 return status;
571}
572
573void ocfs2_sync_blockdev(struct super_block *sb)
574{
575 sync_blockdev(sb->s_bdev);
576}
577
578static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
579 struct inode *inode,
580 struct buffer_head *fe_bh)
581{
582 int status = 0;
583 struct ocfs2_dinode *fe;
584 handle_t *handle = NULL;
585
586 fe = (struct ocfs2_dinode *) fe_bh->b_data;
587
588 /*
589 * This check will also skip truncate of inodes with inline
590 * data and fast symlinks.
591 */
592 if (fe->i_clusters) {
593 if (ocfs2_should_order_data(inode))
594 ocfs2_begin_ordered_truncate(inode, 0);
595
596 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
597 if (IS_ERR(handle)) {
598 status = PTR_ERR(handle);
599 handle = NULL;
600 mlog_errno(status);
601 goto out;
602 }
603
604 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
605 fe_bh,
606 OCFS2_JOURNAL_ACCESS_WRITE);
607 if (status < 0) {
608 mlog_errno(status);
609 goto out;
610 }
611
612 i_size_write(inode, 0);
613
614 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
615 if (status < 0) {
616 mlog_errno(status);
617 goto out;
618 }
619
620 ocfs2_commit_trans(osb, handle);
621 handle = NULL;
622
623 status = ocfs2_commit_truncate(osb, inode, fe_bh);
624 if (status < 0)
625 mlog_errno(status);
626 }
627
628out:
629 if (handle)
630 ocfs2_commit_trans(osb, handle);
631 return status;
632}
633
634static int ocfs2_remove_inode(struct inode *inode,
635 struct buffer_head *di_bh,
636 struct inode *orphan_dir_inode,
637 struct buffer_head *orphan_dir_bh)
638{
639 int status;
640 struct inode *inode_alloc_inode = NULL;
641 struct buffer_head *inode_alloc_bh = NULL;
642 handle_t *handle;
643 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
644 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
645
646 inode_alloc_inode =
647 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
648 le16_to_cpu(di->i_suballoc_slot));
649 if (!inode_alloc_inode) {
650 status = -ENOENT;
651 mlog_errno(status);
652 goto bail;
653 }
654
655 inode_lock(inode_alloc_inode);
656 status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
657 if (status < 0) {
658 inode_unlock(inode_alloc_inode);
659
660 mlog_errno(status);
661 goto bail;
662 }
663
664 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
665 ocfs2_quota_trans_credits(inode->i_sb));
666 if (IS_ERR(handle)) {
667 status = PTR_ERR(handle);
668 mlog_errno(status);
669 goto bail_unlock;
670 }
671
672 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
673 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
674 orphan_dir_bh, false);
675 if (status < 0) {
676 mlog_errno(status);
677 goto bail_commit;
678 }
679 }
680
681 /* set the inodes dtime */
682 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
683 OCFS2_JOURNAL_ACCESS_WRITE);
684 if (status < 0) {
685 mlog_errno(status);
686 goto bail_commit;
687 }
688
689 di->i_dtime = cpu_to_le64(ktime_get_real_seconds());
690 di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
691 ocfs2_journal_dirty(handle, di_bh);
692
693 ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
694 dquot_free_inode(inode);
695
696 status = ocfs2_free_dinode(handle, inode_alloc_inode,
697 inode_alloc_bh, di);
698 if (status < 0)
699 mlog_errno(status);
700
701bail_commit:
702 ocfs2_commit_trans(osb, handle);
703bail_unlock:
704 ocfs2_inode_unlock(inode_alloc_inode, 1);
705 inode_unlock(inode_alloc_inode);
706 brelse(inode_alloc_bh);
707bail:
708 iput(inode_alloc_inode);
709
710 return status;
711}
712
713/*
714 * Serialize with orphan dir recovery. If the process doing
715 * recovery on this orphan dir does an iget() with the dir
716 * i_rwsem held, we'll deadlock here. Instead we detect this
717 * and exit early - recovery will wipe this inode for us.
718 */
719static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
720 int slot)
721{
722 int ret = 0;
723
724 spin_lock(&osb->osb_lock);
725 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
726 ret = -EDEADLK;
727 goto out;
728 }
729 /* This signals to the orphan recovery process that it should
730 * wait for us to handle the wipe. */
731 osb->osb_orphan_wipes[slot]++;
732out:
733 spin_unlock(&osb->osb_lock);
734 trace_ocfs2_check_orphan_recovery_state(slot, ret);
735 return ret;
736}
737
738static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
739 int slot)
740{
741 spin_lock(&osb->osb_lock);
742 osb->osb_orphan_wipes[slot]--;
743 spin_unlock(&osb->osb_lock);
744
745 wake_up(&osb->osb_wipe_event);
746}
747
748static int ocfs2_wipe_inode(struct inode *inode,
749 struct buffer_head *di_bh)
750{
751 int status, orphaned_slot = -1;
752 struct inode *orphan_dir_inode = NULL;
753 struct buffer_head *orphan_dir_bh = NULL;
754 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
755 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
756
757 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
758 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
759
760 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
761 if (status)
762 return status;
763
764 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
765 ORPHAN_DIR_SYSTEM_INODE,
766 orphaned_slot);
767 if (!orphan_dir_inode) {
768 status = -ENOENT;
769 mlog_errno(status);
770 goto bail;
771 }
772
773 /* Lock the orphan dir. The lock will be held for the entire
774 * delete_inode operation. We do this now to avoid races with
775 * recovery completion on other nodes. */
776 inode_lock(orphan_dir_inode);
777 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
778 if (status < 0) {
779 inode_unlock(orphan_dir_inode);
780
781 mlog_errno(status);
782 goto bail;
783 }
784 }
785
786 /* we do this while holding the orphan dir lock because we
787 * don't want recovery being run from another node to try an
788 * inode delete underneath us -- this will result in two nodes
789 * truncating the same file! */
790 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
791 if (status < 0) {
792 mlog_errno(status);
793 goto bail_unlock_dir;
794 }
795
796 /* Remove any dir index tree */
797 if (S_ISDIR(inode->i_mode)) {
798 status = ocfs2_dx_dir_truncate(inode, di_bh);
799 if (status) {
800 mlog_errno(status);
801 goto bail_unlock_dir;
802 }
803 }
804
805 /*Free extended attribute resources associated with this inode.*/
806 status = ocfs2_xattr_remove(inode, di_bh);
807 if (status < 0) {
808 mlog_errno(status);
809 goto bail_unlock_dir;
810 }
811
812 status = ocfs2_remove_refcount_tree(inode, di_bh);
813 if (status < 0) {
814 mlog_errno(status);
815 goto bail_unlock_dir;
816 }
817
818 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
819 orphan_dir_bh);
820 if (status < 0)
821 mlog_errno(status);
822
823bail_unlock_dir:
824 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)
825 return status;
826
827 ocfs2_inode_unlock(orphan_dir_inode, 1);
828 inode_unlock(orphan_dir_inode);
829 brelse(orphan_dir_bh);
830bail:
831 iput(orphan_dir_inode);
832 ocfs2_signal_wipe_completion(osb, orphaned_slot);
833
834 return status;
835}
836
837/* There is a series of simple checks that should be done before a
838 * trylock is even considered. Encapsulate those in this function. */
839static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
840{
841 int ret = 0;
842 struct ocfs2_inode_info *oi = OCFS2_I(inode);
843 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
844
845 trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task,
846 (unsigned long long)oi->ip_blkno,
847 oi->ip_flags);
848
849 /* We shouldn't be getting here for the root directory
850 * inode.. */
851 if (inode == osb->root_inode) {
852 mlog(ML_ERROR, "Skipping delete of root inode.\n");
853 goto bail;
854 }
855
856 /*
857 * If we're coming from downconvert_thread we can't go into our own
858 * voting [hello, deadlock city!] so we cannot delete the inode. But
859 * since we dropped last inode ref when downconverting dentry lock,
860 * we cannot have the file open and thus the node doing unlink will
861 * take care of deleting the inode.
862 */
863 if (current == osb->dc_task)
864 goto bail;
865
866 spin_lock(&oi->ip_lock);
867 /* OCFS2 *never* deletes system files. This should technically
868 * never get here as system file inodes should always have a
869 * positive link count. */
870 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
871 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
872 (unsigned long long)oi->ip_blkno);
873 goto bail_unlock;
874 }
875
876 ret = 1;
877bail_unlock:
878 spin_unlock(&oi->ip_lock);
879bail:
880 return ret;
881}
882
883/* Query the cluster to determine whether we should wipe an inode from
884 * disk or not.
885 *
886 * Requires the inode to have the cluster lock. */
887static int ocfs2_query_inode_wipe(struct inode *inode,
888 struct buffer_head *di_bh,
889 int *wipe)
890{
891 int status = 0, reason = 0;
892 struct ocfs2_inode_info *oi = OCFS2_I(inode);
893 struct ocfs2_dinode *di;
894
895 *wipe = 0;
896
897 trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno,
898 inode->i_nlink);
899
900 /* While we were waiting for the cluster lock in
901 * ocfs2_delete_inode, another node might have asked to delete
902 * the inode. Recheck our flags to catch this. */
903 if (!ocfs2_inode_is_valid_to_delete(inode)) {
904 reason = 1;
905 goto bail;
906 }
907
908 /* Now that we have an up to date inode, we can double check
909 * the link count. */
910 if (inode->i_nlink)
911 goto bail;
912
913 /* Do some basic inode verification... */
914 di = (struct ocfs2_dinode *) di_bh->b_data;
915 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) &&
916 !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
917 /*
918 * Inodes in the orphan dir must have ORPHANED_FL. The only
919 * inodes that come back out of the orphan dir are reflink
920 * targets. A reflink target may be moved out of the orphan
921 * dir between the time we scan the directory and the time we
922 * process it. This would lead to HAS_REFCOUNT_FL being set but
923 * ORPHANED_FL not.
924 */
925 if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) {
926 reason = 2;
927 goto bail;
928 }
929
930 /* for lack of a better error? */
931 status = -EEXIST;
932 mlog(ML_ERROR,
933 "Inode %llu (on-disk %llu) not orphaned! "
934 "Disk flags 0x%x, inode flags 0x%x\n",
935 (unsigned long long)oi->ip_blkno,
936 (unsigned long long)le64_to_cpu(di->i_blkno),
937 le32_to_cpu(di->i_flags), oi->ip_flags);
938 goto bail;
939 }
940
941 /* has someone already deleted us?! baaad... */
942 if (di->i_dtime) {
943 status = -EEXIST;
944 mlog_errno(status);
945 goto bail;
946 }
947
948 /*
949 * This is how ocfs2 determines whether an inode is still live
950 * within the cluster. Every node takes a shared read lock on
951 * the inode open lock in ocfs2_read_locked_inode(). When we
952 * get to ->delete_inode(), each node tries to convert it's
953 * lock to an exclusive. Trylocks are serialized by the inode
954 * meta data lock. If the upconvert succeeds, we know the inode
955 * is no longer live and can be deleted.
956 *
957 * Though we call this with the meta data lock held, the
958 * trylock keeps us from ABBA deadlock.
959 */
960 status = ocfs2_try_open_lock(inode, 1);
961 if (status == -EAGAIN) {
962 status = 0;
963 reason = 3;
964 goto bail;
965 }
966 if (status < 0) {
967 mlog_errno(status);
968 goto bail;
969 }
970
971 *wipe = 1;
972 trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot));
973
974bail:
975 trace_ocfs2_query_inode_wipe_end(status, reason);
976 return status;
977}
978
979/* Support function for ocfs2_delete_inode. Will help us keep the
980 * inode data in a consistent state for clear_inode. Always truncates
981 * pages, optionally sync's them first. */
982static void ocfs2_cleanup_delete_inode(struct inode *inode,
983 int sync_data)
984{
985 trace_ocfs2_cleanup_delete_inode(
986 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
987 if (sync_data)
988 filemap_write_and_wait(inode->i_mapping);
989 truncate_inode_pages_final(&inode->i_data);
990}
991
992static void ocfs2_delete_inode(struct inode *inode)
993{
994 int wipe, status;
995 sigset_t oldset;
996 struct buffer_head *di_bh = NULL;
997 struct ocfs2_dinode *di = NULL;
998
999 trace_ocfs2_delete_inode(inode->i_ino,
1000 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1001 is_bad_inode(inode));
1002
1003 /* When we fail in read_inode() we mark inode as bad. The second test
1004 * catches the case when inode allocation fails before allocating
1005 * a block for inode. */
1006 if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno)
1007 goto bail;
1008
1009 if (!ocfs2_inode_is_valid_to_delete(inode)) {
1010 /* It's probably not necessary to truncate_inode_pages
1011 * here but we do it for safety anyway (it will most
1012 * likely be a no-op anyway) */
1013 ocfs2_cleanup_delete_inode(inode, 0);
1014 goto bail;
1015 }
1016
1017 dquot_initialize(inode);
1018
1019 /* We want to block signals in delete_inode as the lock and
1020 * messaging paths may return us -ERESTARTSYS. Which would
1021 * cause us to exit early, resulting in inodes being orphaned
1022 * forever. */
1023 ocfs2_block_signals(&oldset);
1024
1025 /*
1026 * Synchronize us against ocfs2_get_dentry. We take this in
1027 * shared mode so that all nodes can still concurrently
1028 * process deletes.
1029 */
1030 status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0);
1031 if (status < 0) {
1032 mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status);
1033 ocfs2_cleanup_delete_inode(inode, 0);
1034 goto bail_unblock;
1035 }
1036 /* Lock down the inode. This gives us an up to date view of
1037 * it's metadata (for verification), and allows us to
1038 * serialize delete_inode on multiple nodes.
1039 *
1040 * Even though we might be doing a truncate, we don't take the
1041 * allocation lock here as it won't be needed - nobody will
1042 * have the file open.
1043 */
1044 status = ocfs2_inode_lock(inode, &di_bh, 1);
1045 if (status < 0) {
1046 if (status != -ENOENT)
1047 mlog_errno(status);
1048 ocfs2_cleanup_delete_inode(inode, 0);
1049 goto bail_unlock_nfs_sync;
1050 }
1051
1052 di = (struct ocfs2_dinode *)di_bh->b_data;
1053 /* Skip inode deletion and wait for dio orphan entry recovered
1054 * first */
1055 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
1056 ocfs2_cleanup_delete_inode(inode, 0);
1057 goto bail_unlock_inode;
1058 }
1059
1060 /* Query the cluster. This will be the final decision made
1061 * before we go ahead and wipe the inode. */
1062 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
1063 if (!wipe || status < 0) {
1064 /* Error and remote inode busy both mean we won't be
1065 * removing the inode, so they take almost the same
1066 * path. */
1067 if (status < 0)
1068 mlog_errno(status);
1069
1070 /* Someone in the cluster has disallowed a wipe of
1071 * this inode, or it was never completely
1072 * orphaned. Write out the pages and exit now. */
1073 ocfs2_cleanup_delete_inode(inode, 1);
1074 goto bail_unlock_inode;
1075 }
1076
1077 ocfs2_cleanup_delete_inode(inode, 0);
1078
1079 status = ocfs2_wipe_inode(inode, di_bh);
1080 if (status < 0) {
1081 if (status != -EDEADLK)
1082 mlog_errno(status);
1083 goto bail_unlock_inode;
1084 }
1085
1086 /*
1087 * Mark the inode as successfully deleted.
1088 *
1089 * This is important for ocfs2_clear_inode() as it will check
1090 * this flag and skip any checkpointing work
1091 *
1092 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1093 * the LVB for other nodes.
1094 */
1095 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
1096
1097bail_unlock_inode:
1098 ocfs2_inode_unlock(inode, 1);
1099 brelse(di_bh);
1100
1101bail_unlock_nfs_sync:
1102 ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0);
1103
1104bail_unblock:
1105 ocfs2_unblock_signals(&oldset);
1106bail:
1107 return;
1108}
1109
1110static void ocfs2_clear_inode(struct inode *inode)
1111{
1112 int status;
1113 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1114 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1115
1116 clear_inode(inode);
1117 trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno,
1118 inode->i_nlink);
1119
1120 mlog_bug_on_msg(osb == NULL,
1121 "Inode=%lu\n", inode->i_ino);
1122
1123 dquot_drop(inode);
1124
1125 /* To preven remote deletes we hold open lock before, now it
1126 * is time to unlock PR and EX open locks. */
1127 ocfs2_open_unlock(inode);
1128
1129 /* Do these before all the other work so that we don't bounce
1130 * the downconvert thread while waiting to destroy the locks. */
1131 ocfs2_mark_lockres_freeing(osb, &oi->ip_rw_lockres);
1132 ocfs2_mark_lockres_freeing(osb, &oi->ip_inode_lockres);
1133 ocfs2_mark_lockres_freeing(osb, &oi->ip_open_lockres);
1134
1135 ocfs2_resv_discard(&osb->osb_la_resmap,
1136 &oi->ip_la_data_resv);
1137 ocfs2_resv_init_once(&oi->ip_la_data_resv);
1138
1139 /* We very well may get a clear_inode before all an inodes
1140 * metadata has hit disk. Of course, we can't drop any cluster
1141 * locks until the journal has finished with it. The only
1142 * exception here are successfully wiped inodes - their
1143 * metadata can now be considered to be part of the system
1144 * inodes from which it came. */
1145 if (!(oi->ip_flags & OCFS2_INODE_DELETED))
1146 ocfs2_checkpoint_inode(inode);
1147
1148 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1149 "Clear inode of %llu, inode has io markers\n",
1150 (unsigned long long)oi->ip_blkno);
1151 mlog_bug_on_msg(!list_empty(&oi->ip_unwritten_list),
1152 "Clear inode of %llu, inode has unwritten extents\n",
1153 (unsigned long long)oi->ip_blkno);
1154
1155 ocfs2_extent_map_trunc(inode, 0);
1156
1157 status = ocfs2_drop_inode_locks(inode);
1158 if (status < 0)
1159 mlog_errno(status);
1160
1161 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1162 ocfs2_lock_res_free(&oi->ip_inode_lockres);
1163 ocfs2_lock_res_free(&oi->ip_open_lockres);
1164
1165 ocfs2_metadata_cache_exit(INODE_CACHE(inode));
1166
1167 mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
1168 "Clear inode of %llu, inode has %u cache items\n",
1169 (unsigned long long)oi->ip_blkno,
1170 INODE_CACHE(inode)->ci_num_cached);
1171
1172 mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE),
1173 "Clear inode of %llu, inode has a bad flag\n",
1174 (unsigned long long)oi->ip_blkno);
1175
1176 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1177 "Clear inode of %llu, inode is locked\n",
1178 (unsigned long long)oi->ip_blkno);
1179
1180 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1181 "Clear inode of %llu, io_mutex is locked\n",
1182 (unsigned long long)oi->ip_blkno);
1183 mutex_unlock(&oi->ip_io_mutex);
1184
1185 /*
1186 * down_trylock() returns 0, down_write_trylock() returns 1
1187 * kernel 1, world 0
1188 */
1189 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1190 "Clear inode of %llu, alloc_sem is locked\n",
1191 (unsigned long long)oi->ip_blkno);
1192 up_write(&oi->ip_alloc_sem);
1193
1194 mlog_bug_on_msg(oi->ip_open_count,
1195 "Clear inode of %llu has open count %d\n",
1196 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1197
1198 /* Clear all other flags. */
1199 oi->ip_flags = 0;
1200 oi->ip_dir_start_lookup = 0;
1201 oi->ip_blkno = 0ULL;
1202
1203 /*
1204 * ip_jinode is used to track txns against this inode. We ensure that
1205 * the journal is flushed before journal shutdown. Thus it is safe to
1206 * have inodes get cleaned up after journal shutdown.
1207 */
1208 jbd2_journal_release_jbd_inode(osb->journal->j_journal,
1209 &oi->ip_jinode);
1210}
1211
1212void ocfs2_evict_inode(struct inode *inode)
1213{
1214 if (!inode->i_nlink ||
1215 (OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) {
1216 ocfs2_delete_inode(inode);
1217 } else {
1218 truncate_inode_pages_final(&inode->i_data);
1219 }
1220 ocfs2_clear_inode(inode);
1221}
1222
1223/* Called under inode_lock, with no more references on the
1224 * struct inode, so it's safe here to check the flags field
1225 * and to manipulate i_nlink without any other locks. */
1226int ocfs2_drop_inode(struct inode *inode)
1227{
1228 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1229
1230 trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno,
1231 inode->i_nlink, oi->ip_flags);
1232
1233 assert_spin_locked(&inode->i_lock);
1234 inode->i_state |= I_WILL_FREE;
1235 spin_unlock(&inode->i_lock);
1236 write_inode_now(inode, 1);
1237 spin_lock(&inode->i_lock);
1238 WARN_ON(inode->i_state & I_NEW);
1239 inode->i_state &= ~I_WILL_FREE;
1240
1241 return 1;
1242}
1243
1244/*
1245 * This is called from our getattr.
1246 */
1247int ocfs2_inode_revalidate(struct dentry *dentry)
1248{
1249 struct inode *inode = d_inode(dentry);
1250 int status = 0;
1251
1252 trace_ocfs2_inode_revalidate(inode,
1253 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL,
1254 inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0);
1255
1256 if (!inode) {
1257 status = -ENOENT;
1258 goto bail;
1259 }
1260
1261 spin_lock(&OCFS2_I(inode)->ip_lock);
1262 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1263 spin_unlock(&OCFS2_I(inode)->ip_lock);
1264 status = -ENOENT;
1265 goto bail;
1266 }
1267 spin_unlock(&OCFS2_I(inode)->ip_lock);
1268
1269 /* Let ocfs2_inode_lock do the work of updating our struct
1270 * inode for us. */
1271 status = ocfs2_inode_lock(inode, NULL, 0);
1272 if (status < 0) {
1273 if (status != -ENOENT)
1274 mlog_errno(status);
1275 goto bail;
1276 }
1277 ocfs2_inode_unlock(inode, 0);
1278bail:
1279 return status;
1280}
1281
1282/*
1283 * Updates a disk inode from a
1284 * struct inode.
1285 * Only takes ip_lock.
1286 */
1287int ocfs2_mark_inode_dirty(handle_t *handle,
1288 struct inode *inode,
1289 struct buffer_head *bh)
1290{
1291 int status;
1292 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1293
1294 trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno);
1295
1296 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1297 OCFS2_JOURNAL_ACCESS_WRITE);
1298 if (status < 0) {
1299 mlog_errno(status);
1300 goto leave;
1301 }
1302
1303 spin_lock(&OCFS2_I(inode)->ip_lock);
1304 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1305 ocfs2_get_inode_flags(OCFS2_I(inode));
1306 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1307 fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1308 spin_unlock(&OCFS2_I(inode)->ip_lock);
1309
1310 fe->i_size = cpu_to_le64(i_size_read(inode));
1311 ocfs2_set_links_count(fe, inode->i_nlink);
1312 fe->i_uid = cpu_to_le32(i_uid_read(inode));
1313 fe->i_gid = cpu_to_le32(i_gid_read(inode));
1314 fe->i_mode = cpu_to_le16(inode->i_mode);
1315 fe->i_atime = cpu_to_le64(inode_get_atime_sec(inode));
1316 fe->i_atime_nsec = cpu_to_le32(inode_get_atime_nsec(inode));
1317 fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode));
1318 fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode));
1319 fe->i_mtime = cpu_to_le64(inode_get_mtime_sec(inode));
1320 fe->i_mtime_nsec = cpu_to_le32(inode_get_mtime_nsec(inode));
1321
1322 ocfs2_journal_dirty(handle, bh);
1323 ocfs2_update_inode_fsync_trans(handle, inode, 1);
1324leave:
1325 return status;
1326}
1327
1328/*
1329 *
1330 * Updates a struct inode from a disk inode.
1331 * does no i/o, only takes ip_lock.
1332 */
1333void ocfs2_refresh_inode(struct inode *inode,
1334 struct ocfs2_dinode *fe)
1335{
1336 spin_lock(&OCFS2_I(inode)->ip_lock);
1337
1338 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1339 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1340 OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1341 ocfs2_set_inode_flags(inode);
1342 i_size_write(inode, le64_to_cpu(fe->i_size));
1343 set_nlink(inode, ocfs2_read_links_count(fe));
1344 i_uid_write(inode, le32_to_cpu(fe->i_uid));
1345 i_gid_write(inode, le32_to_cpu(fe->i_gid));
1346 inode->i_mode = le16_to_cpu(fe->i_mode);
1347 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1348 inode->i_blocks = 0;
1349 else
1350 inode->i_blocks = ocfs2_inode_sector_count(inode);
1351 inode_set_atime(inode, le64_to_cpu(fe->i_atime),
1352 le32_to_cpu(fe->i_atime_nsec));
1353 inode_set_mtime(inode, le64_to_cpu(fe->i_mtime),
1354 le32_to_cpu(fe->i_mtime_nsec));
1355 inode_set_ctime(inode, le64_to_cpu(fe->i_ctime),
1356 le32_to_cpu(fe->i_ctime_nsec));
1357
1358 spin_unlock(&OCFS2_I(inode)->ip_lock);
1359}
1360
1361int ocfs2_validate_inode_block(struct super_block *sb,
1362 struct buffer_head *bh)
1363{
1364 int rc;
1365 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1366
1367 trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr);
1368
1369 BUG_ON(!buffer_uptodate(bh));
1370
1371 /*
1372 * If the ecc fails, we return the error but otherwise
1373 * leave the filesystem running. We know any error is
1374 * local to this block.
1375 */
1376 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1377 if (rc) {
1378 mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
1379 (unsigned long long)bh->b_blocknr);
1380 goto bail;
1381 }
1382
1383 /*
1384 * Errors after here are fatal.
1385 */
1386
1387 rc = -EINVAL;
1388
1389 if (!OCFS2_IS_VALID_DINODE(di)) {
1390 rc = ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
1391 (unsigned long long)bh->b_blocknr, 7,
1392 di->i_signature);
1393 goto bail;
1394 }
1395
1396 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1397 rc = ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
1398 (unsigned long long)bh->b_blocknr,
1399 (unsigned long long)le64_to_cpu(di->i_blkno));
1400 goto bail;
1401 }
1402
1403 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1404 rc = ocfs2_error(sb,
1405 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
1406 (unsigned long long)bh->b_blocknr);
1407 goto bail;
1408 }
1409
1410 if (le32_to_cpu(di->i_fs_generation) !=
1411 OCFS2_SB(sb)->fs_generation) {
1412 rc = ocfs2_error(sb,
1413 "Invalid dinode #%llu: fs_generation is %u\n",
1414 (unsigned long long)bh->b_blocknr,
1415 le32_to_cpu(di->i_fs_generation));
1416 goto bail;
1417 }
1418
1419 rc = 0;
1420
1421bail:
1422 return rc;
1423}
1424
1425static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
1426 struct buffer_head *bh)
1427{
1428 int rc = 0;
1429 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1430
1431 trace_ocfs2_filecheck_validate_inode_block(
1432 (unsigned long long)bh->b_blocknr);
1433
1434 BUG_ON(!buffer_uptodate(bh));
1435
1436 /*
1437 * Call ocfs2_validate_meta_ecc() first since it has ecc repair
1438 * function, but we should not return error immediately when ecc
1439 * validation fails, because the reason is quite likely the invalid
1440 * inode number inputed.
1441 */
1442 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1443 if (rc) {
1444 mlog(ML_ERROR,
1445 "Filecheck: checksum failed for dinode %llu\n",
1446 (unsigned long long)bh->b_blocknr);
1447 rc = -OCFS2_FILECHECK_ERR_BLOCKECC;
1448 }
1449
1450 if (!OCFS2_IS_VALID_DINODE(di)) {
1451 mlog(ML_ERROR,
1452 "Filecheck: invalid dinode #%llu: signature = %.*s\n",
1453 (unsigned long long)bh->b_blocknr, 7, di->i_signature);
1454 rc = -OCFS2_FILECHECK_ERR_INVALIDINO;
1455 goto bail;
1456 } else if (rc)
1457 goto bail;
1458
1459 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1460 mlog(ML_ERROR,
1461 "Filecheck: invalid dinode #%llu: i_blkno is %llu\n",
1462 (unsigned long long)bh->b_blocknr,
1463 (unsigned long long)le64_to_cpu(di->i_blkno));
1464 rc = -OCFS2_FILECHECK_ERR_BLOCKNO;
1465 goto bail;
1466 }
1467
1468 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1469 mlog(ML_ERROR,
1470 "Filecheck: invalid dinode #%llu: OCFS2_VALID_FL "
1471 "not set\n",
1472 (unsigned long long)bh->b_blocknr);
1473 rc = -OCFS2_FILECHECK_ERR_VALIDFLAG;
1474 goto bail;
1475 }
1476
1477 if (le32_to_cpu(di->i_fs_generation) !=
1478 OCFS2_SB(sb)->fs_generation) {
1479 mlog(ML_ERROR,
1480 "Filecheck: invalid dinode #%llu: fs_generation is %u\n",
1481 (unsigned long long)bh->b_blocknr,
1482 le32_to_cpu(di->i_fs_generation));
1483 rc = -OCFS2_FILECHECK_ERR_GENERATION;
1484 }
1485
1486bail:
1487 return rc;
1488}
1489
1490static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
1491 struct buffer_head *bh)
1492{
1493 int changed = 0;
1494 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1495
1496 if (!ocfs2_filecheck_validate_inode_block(sb, bh))
1497 return 0;
1498
1499 trace_ocfs2_filecheck_repair_inode_block(
1500 (unsigned long long)bh->b_blocknr);
1501
1502 if (ocfs2_is_hard_readonly(OCFS2_SB(sb)) ||
1503 ocfs2_is_soft_readonly(OCFS2_SB(sb))) {
1504 mlog(ML_ERROR,
1505 "Filecheck: cannot repair dinode #%llu "
1506 "on readonly filesystem\n",
1507 (unsigned long long)bh->b_blocknr);
1508 return -OCFS2_FILECHECK_ERR_READONLY;
1509 }
1510
1511 if (buffer_jbd(bh)) {
1512 mlog(ML_ERROR,
1513 "Filecheck: cannot repair dinode #%llu, "
1514 "its buffer is in jbd\n",
1515 (unsigned long long)bh->b_blocknr);
1516 return -OCFS2_FILECHECK_ERR_INJBD;
1517 }
1518
1519 if (!OCFS2_IS_VALID_DINODE(di)) {
1520 /* Cannot fix invalid inode block */
1521 return -OCFS2_FILECHECK_ERR_INVALIDINO;
1522 }
1523
1524 if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1525 /* Cannot just add VALID_FL flag back as a fix,
1526 * need more things to check here.
1527 */
1528 return -OCFS2_FILECHECK_ERR_VALIDFLAG;
1529 }
1530
1531 if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1532 di->i_blkno = cpu_to_le64(bh->b_blocknr);
1533 changed = 1;
1534 mlog(ML_ERROR,
1535 "Filecheck: reset dinode #%llu: i_blkno to %llu\n",
1536 (unsigned long long)bh->b_blocknr,
1537 (unsigned long long)le64_to_cpu(di->i_blkno));
1538 }
1539
1540 if (le32_to_cpu(di->i_fs_generation) !=
1541 OCFS2_SB(sb)->fs_generation) {
1542 di->i_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation);
1543 changed = 1;
1544 mlog(ML_ERROR,
1545 "Filecheck: reset dinode #%llu: fs_generation to %u\n",
1546 (unsigned long long)bh->b_blocknr,
1547 le32_to_cpu(di->i_fs_generation));
1548 }
1549
1550 if (changed || ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check)) {
1551 ocfs2_compute_meta_ecc(sb, bh->b_data, &di->i_check);
1552 mark_buffer_dirty(bh);
1553 mlog(ML_ERROR,
1554 "Filecheck: reset dinode #%llu: compute meta ecc\n",
1555 (unsigned long long)bh->b_blocknr);
1556 }
1557
1558 return 0;
1559}
1560
1561static int
1562ocfs2_filecheck_read_inode_block_full(struct inode *inode,
1563 struct buffer_head **bh,
1564 int flags, int type)
1565{
1566 int rc;
1567 struct buffer_head *tmp = *bh;
1568
1569 if (!type) /* Check inode block */
1570 rc = ocfs2_read_blocks(INODE_CACHE(inode),
1571 OCFS2_I(inode)->ip_blkno,
1572 1, &tmp, flags,
1573 ocfs2_filecheck_validate_inode_block);
1574 else /* Repair inode block */
1575 rc = ocfs2_read_blocks(INODE_CACHE(inode),
1576 OCFS2_I(inode)->ip_blkno,
1577 1, &tmp, flags,
1578 ocfs2_filecheck_repair_inode_block);
1579
1580 /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1581 if (!rc && !*bh)
1582 *bh = tmp;
1583
1584 return rc;
1585}
1586
1587int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
1588 int flags)
1589{
1590 int rc;
1591 struct buffer_head *tmp = *bh;
1592
1593 rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno,
1594 1, &tmp, flags, ocfs2_validate_inode_block);
1595
1596 /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1597 if (!rc && !*bh)
1598 *bh = tmp;
1599
1600 return rc;
1601}
1602
1603int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
1604{
1605 return ocfs2_read_inode_block_full(inode, bh, 0);
1606}
1607
1608
1609static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci)
1610{
1611 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1612
1613 return oi->ip_blkno;
1614}
1615
1616static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci)
1617{
1618 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1619
1620 return oi->vfs_inode.i_sb;
1621}
1622
1623static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
1624{
1625 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1626
1627 spin_lock(&oi->ip_lock);
1628}
1629
1630static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
1631{
1632 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1633
1634 spin_unlock(&oi->ip_lock);
1635}
1636
1637static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci)
1638{
1639 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1640
1641 mutex_lock(&oi->ip_io_mutex);
1642}
1643
1644static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci)
1645{
1646 struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1647
1648 mutex_unlock(&oi->ip_io_mutex);
1649}
1650
1651const struct ocfs2_caching_operations ocfs2_inode_caching_ops = {
1652 .co_owner = ocfs2_inode_cache_owner,
1653 .co_get_super = ocfs2_inode_cache_get_super,
1654 .co_cache_lock = ocfs2_inode_cache_lock,
1655 .co_cache_unlock = ocfs2_inode_cache_unlock,
1656 .co_io_lock = ocfs2_inode_cache_io_lock,
1657 .co_io_unlock = ocfs2_inode_cache_io_unlock,
1658};
1659