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-rw-r--r--fs/ocfs2/inode.c1140
1 files changed, 1140 insertions, 0 deletions
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
new file mode 100644
index 000000000000..a91ba4dec936
--- /dev/null
+++ b/fs/ocfs2/inode.c
@@ -0,0 +1,1140 @@
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/slab.h>
29#include <linux/highmem.h>
30#include <linux/pagemap.h>
31#include <linux/smp_lock.h>
32
33#include <asm/byteorder.h>
34
35#define MLOG_MASK_PREFIX ML_INODE
36#include <cluster/masklog.h>
37
38#include "ocfs2.h"
39
40#include "alloc.h"
41#include "dlmglue.h"
42#include "extent_map.h"
43#include "file.h"
44#include "inode.h"
45#include "journal.h"
46#include "namei.h"
47#include "suballoc.h"
48#include "super.h"
49#include "symlink.h"
50#include "sysfile.h"
51#include "uptodate.h"
52#include "vote.h"
53
54#include "buffer_head_io.h"
55
56#define OCFS2_FI_FLAG_NOWAIT 0x1
57#define OCFS2_FI_FLAG_DELETE 0x2
58struct ocfs2_find_inode_args
59{
60 u64 fi_blkno;
61 unsigned long fi_ino;
62 unsigned int fi_flags;
63};
64
65static int ocfs2_read_locked_inode(struct inode *inode,
66 struct ocfs2_find_inode_args *args);
67static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
68static int ocfs2_find_actor(struct inode *inode, void *opaque);
69static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
70 struct inode *inode,
71 struct buffer_head *fe_bh);
72
73struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb,
74 u64 blkno,
75 int delete_vote)
76{
77 struct ocfs2_find_inode_args args;
78
79 /* ocfs2_ilookup_for_vote should *only* be called from the
80 * vote thread */
81 BUG_ON(current != osb->vote_task);
82
83 args.fi_blkno = blkno;
84 args.fi_flags = OCFS2_FI_FLAG_NOWAIT;
85 if (delete_vote)
86 args.fi_flags |= OCFS2_FI_FLAG_DELETE;
87 args.fi_ino = ino_from_blkno(osb->sb, blkno);
88 return ilookup5(osb->sb, args.fi_ino, ocfs2_find_actor, &args);
89}
90
91struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno)
92{
93 struct inode *inode = NULL;
94 struct super_block *sb = osb->sb;
95 struct ocfs2_find_inode_args args;
96
97 mlog_entry("(blkno = %"MLFu64")\n", blkno);
98
99 /* Ok. By now we've either got the offsets passed to us by the
100 * caller, or we just pulled them off the bh. Lets do some
101 * sanity checks to make sure they're OK. */
102 if (blkno == 0) {
103 inode = ERR_PTR(-EINVAL);
104 mlog_errno(PTR_ERR(inode));
105 goto bail;
106 }
107
108 args.fi_blkno = blkno;
109 args.fi_flags = 0;
110 args.fi_ino = ino_from_blkno(sb, blkno);
111
112 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
113 ocfs2_init_locked_inode, &args);
114 /* inode was *not* in the inode cache. 2.6.x requires
115 * us to do our own read_inode call and unlock it
116 * afterwards. */
117 if (inode && inode->i_state & I_NEW) {
118 mlog(0, "Inode was not in inode cache, reading it.\n");
119 ocfs2_read_locked_inode(inode, &args);
120 unlock_new_inode(inode);
121 }
122 if (inode == NULL) {
123 inode = ERR_PTR(-ENOMEM);
124 mlog_errno(PTR_ERR(inode));
125 goto bail;
126 }
127 if (is_bad_inode(inode)) {
128 iput(inode);
129 inode = ERR_PTR(-ESTALE);
130 mlog_errno(PTR_ERR(inode));
131 goto bail;
132 }
133
134bail:
135 if (!IS_ERR(inode)) {
136 mlog(0, "returning inode with number %"MLFu64"\n",
137 OCFS2_I(inode)->ip_blkno);
138 mlog_exit_ptr(inode);
139 } else
140 mlog_errno(PTR_ERR(inode));
141
142 return inode;
143}
144
145
146/*
147 * here's how inodes get read from disk:
148 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
149 * found? : return the in-memory inode
150 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
151 */
152
153static int ocfs2_find_actor(struct inode *inode, void *opaque)
154{
155 struct ocfs2_find_inode_args *args = NULL;
156 struct ocfs2_inode_info *oi = OCFS2_I(inode);
157 int ret = 0;
158
159 mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque);
160
161 args = opaque;
162
163 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
164
165 if (oi->ip_blkno != args->fi_blkno)
166 goto bail;
167
168 /* OCFS2_FI_FLAG_NOWAIT is *only* set from
169 * ocfs2_ilookup_for_vote which won't create an inode for one
170 * that isn't found. The vote thread which doesn't want to get
171 * an inode which is in the process of going away - otherwise
172 * the call to __wait_on_freeing_inode in find_inode_fast will
173 * cause it to deadlock on an inode which may be waiting on a
174 * vote (or lock release) in delete_inode */
175 if ((args->fi_flags & OCFS2_FI_FLAG_NOWAIT) &&
176 (inode->i_state & (I_FREEING|I_CLEAR))) {
177 /* As stated above, we're not going to return an
178 * inode. In the case of a delete vote, the voting
179 * code is going to signal the other node to go
180 * ahead. Mark that state here, so this freeing inode
181 * has the state when it gets to delete_inode. */
182 if (args->fi_flags & OCFS2_FI_FLAG_DELETE) {
183 spin_lock(&oi->ip_lock);
184 ocfs2_mark_inode_remotely_deleted(inode);
185 spin_unlock(&oi->ip_lock);
186 }
187 goto bail;
188 }
189
190 ret = 1;
191bail:
192 mlog_exit(ret);
193 return ret;
194}
195
196/*
197 * initialize the new inode, but don't do anything that would cause
198 * us to sleep.
199 * return 0 on success, 1 on failure
200 */
201static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
202{
203 struct ocfs2_find_inode_args *args = opaque;
204
205 mlog_entry("inode = %p, opaque = %p\n", inode, opaque);
206
207 inode->i_ino = args->fi_ino;
208 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
209
210 mlog_exit(0);
211 return 0;
212}
213
214int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
215 int create_ino)
216{
217 struct super_block *sb;
218 struct ocfs2_super *osb;
219 int status = -EINVAL;
220
221 mlog_entry("(0x%p, size:%"MLFu64")\n", inode, fe->i_size);
222
223 sb = inode->i_sb;
224 osb = OCFS2_SB(sb);
225
226 /* this means that read_inode cannot create a superblock inode
227 * today. change if needed. */
228 if (!OCFS2_IS_VALID_DINODE(fe) ||
229 !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
230 mlog(ML_ERROR, "Invalid dinode: i_ino=%lu, i_blkno=%"MLFu64", "
231 "signature = %.*s, flags = 0x%x\n",
232 inode->i_ino, le64_to_cpu(fe->i_blkno), 7,
233 fe->i_signature, le32_to_cpu(fe->i_flags));
234 goto bail;
235 }
236
237 if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) {
238 mlog(ML_ERROR, "file entry generation does not match "
239 "superblock! osb->fs_generation=%x, "
240 "fe->i_fs_generation=%x\n",
241 osb->fs_generation, le32_to_cpu(fe->i_fs_generation));
242 goto bail;
243 }
244
245 inode->i_version = 1;
246 inode->i_generation = le32_to_cpu(fe->i_generation);
247 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
248 inode->i_mode = le16_to_cpu(fe->i_mode);
249 inode->i_uid = le32_to_cpu(fe->i_uid);
250 inode->i_gid = le32_to_cpu(fe->i_gid);
251 inode->i_blksize = (u32)osb->s_clustersize;
252
253 /* Fast symlinks will have i_size but no allocated clusters. */
254 if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
255 inode->i_blocks = 0;
256 else
257 inode->i_blocks =
258 ocfs2_align_bytes_to_sectors(le64_to_cpu(fe->i_size));
259 inode->i_mapping->a_ops = &ocfs2_aops;
260 inode->i_flags |= S_NOATIME;
261 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
262 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
263 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
264 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
265 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
266 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
267
268 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
269 mlog(ML_ERROR,
270 "ip_blkno %"MLFu64" != i_blkno %"MLFu64"!\n",
271 OCFS2_I(inode)->ip_blkno, fe->i_blkno);
272
273 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
274 OCFS2_I(inode)->ip_orphaned_slot = OCFS2_INVALID_SLOT;
275
276 if (create_ino)
277 inode->i_ino = ino_from_blkno(inode->i_sb,
278 le64_to_cpu(fe->i_blkno));
279
280 mlog(0, "blkno = %"MLFu64", ino = %lu, create_ino = %s\n",
281 fe->i_blkno, inode->i_ino, create_ino ? "true" : "false");
282
283 inode->i_nlink = le16_to_cpu(fe->i_links_count);
284
285 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
286 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
287 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
288 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
289 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
290 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
291 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
292 /* we can't actually hit this as read_inode can't
293 * handle superblocks today ;-) */
294 BUG();
295 }
296
297 switch (inode->i_mode & S_IFMT) {
298 case S_IFREG:
299 inode->i_fop = &ocfs2_fops;
300 inode->i_op = &ocfs2_file_iops;
301 i_size_write(inode, le64_to_cpu(fe->i_size));
302 break;
303 case S_IFDIR:
304 inode->i_op = &ocfs2_dir_iops;
305 inode->i_fop = &ocfs2_dops;
306 i_size_write(inode, le64_to_cpu(fe->i_size));
307 break;
308 case S_IFLNK:
309 if (ocfs2_inode_is_fast_symlink(inode))
310 inode->i_op = &ocfs2_fast_symlink_inode_operations;
311 else
312 inode->i_op = &ocfs2_symlink_inode_operations;
313 i_size_write(inode, le64_to_cpu(fe->i_size));
314 break;
315 default:
316 inode->i_op = &ocfs2_special_file_iops;
317 init_special_inode(inode, inode->i_mode,
318 inode->i_rdev);
319 break;
320 }
321
322 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
323 OCFS2_LOCK_TYPE_RW, inode);
324 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
325 OCFS2_LOCK_TYPE_META, inode);
326 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres,
327 OCFS2_LOCK_TYPE_DATA, inode);
328
329 status = 0;
330bail:
331 mlog_exit(status);
332 return status;
333}
334
335static int ocfs2_read_locked_inode(struct inode *inode,
336 struct ocfs2_find_inode_args *args)
337{
338 struct super_block *sb;
339 struct ocfs2_super *osb;
340 struct ocfs2_dinode *fe;
341 struct buffer_head *bh = NULL;
342 int status;
343 int sysfile = 0;
344
345 mlog_entry("(0x%p, 0x%p)\n", inode, args);
346
347 status = -EINVAL;
348 if (inode == NULL || inode->i_sb == NULL) {
349 mlog(ML_ERROR, "bad inode\n");
350 goto bail;
351 }
352 sb = inode->i_sb;
353 osb = OCFS2_SB(sb);
354
355 if (!args) {
356 mlog(ML_ERROR, "bad inode args\n");
357 make_bad_inode(inode);
358 goto bail;
359 }
360
361 /* Read the FE off disk. This is safe because the kernel only
362 * does one read_inode2 for a new inode, and if it doesn't
363 * exist yet then nobody can be working on it! */
364 status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0, NULL);
365 if (status < 0) {
366 mlog_errno(status);
367 make_bad_inode(inode);
368 goto bail;
369 }
370
371 fe = (struct ocfs2_dinode *) bh->b_data;
372 if (!OCFS2_IS_VALID_DINODE(fe)) {
373 mlog(ML_ERROR, "Invalid dinode #%"MLFu64": signature = %.*s\n",
374 fe->i_blkno, 7, fe->i_signature);
375 make_bad_inode(inode);
376 goto bail;
377 }
378
379 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
380 sysfile = 1;
381
382 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
383 S_ISBLK(le16_to_cpu(fe->i_mode)))
384 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
385
386 status = -EINVAL;
387 if (ocfs2_populate_inode(inode, fe, 0) < 0) {
388 mlog(ML_ERROR, "populate inode failed! i_blkno=%"MLFu64", "
389 "i_ino=%lu\n", fe->i_blkno, inode->i_ino);
390 make_bad_inode(inode);
391 goto bail;
392 }
393
394 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
395
396 if (sysfile)
397 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
398
399 status = 0;
400
401bail:
402 if (args && bh)
403 brelse(bh);
404
405 mlog_exit(status);
406 return status;
407}
408
409void ocfs2_sync_blockdev(struct super_block *sb)
410{
411 sync_blockdev(sb->s_bdev);
412}
413
414static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
415 struct inode *inode,
416 struct buffer_head *fe_bh)
417{
418 int status = 0;
419 struct ocfs2_journal_handle *handle = NULL;
420 struct ocfs2_truncate_context *tc = NULL;
421 struct ocfs2_dinode *fe;
422
423 mlog_entry_void();
424
425 fe = (struct ocfs2_dinode *) fe_bh->b_data;
426
427 /* zero allocation, zero truncate :) */
428 if (!fe->i_clusters)
429 goto bail;
430
431 handle = ocfs2_start_trans(osb, handle, OCFS2_INODE_UPDATE_CREDITS);
432 if (IS_ERR(handle)) {
433 status = PTR_ERR(handle);
434 handle = NULL;
435 mlog_errno(status);
436 goto bail;
437 }
438
439 status = ocfs2_set_inode_size(handle, inode, fe_bh, 0ULL);
440 if (status < 0) {
441 mlog_errno(status);
442 goto bail;
443 }
444
445 ocfs2_commit_trans(handle);
446 handle = NULL;
447
448 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
449 if (status < 0) {
450 mlog_errno(status);
451 goto bail;
452 }
453
454 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
455 if (status < 0) {
456 mlog_errno(status);
457 goto bail;
458 }
459bail:
460 if (handle)
461 ocfs2_commit_trans(handle);
462
463 mlog_exit(status);
464 return status;
465}
466
467static int ocfs2_remove_inode(struct inode *inode,
468 struct buffer_head *di_bh,
469 struct inode *orphan_dir_inode,
470 struct buffer_head *orphan_dir_bh)
471{
472 int status;
473 struct inode *inode_alloc_inode = NULL;
474 struct buffer_head *inode_alloc_bh = NULL;
475 struct ocfs2_journal_handle *handle;
476 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
477 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
478
479 inode_alloc_inode =
480 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
481 le16_to_cpu(di->i_suballoc_slot));
482 if (!inode_alloc_inode) {
483 status = -EEXIST;
484 mlog_errno(status);
485 goto bail;
486 }
487
488 down(&inode_alloc_inode->i_sem);
489 status = ocfs2_meta_lock(inode_alloc_inode, NULL, &inode_alloc_bh, 1);
490 if (status < 0) {
491 up(&inode_alloc_inode->i_sem);
492
493 mlog_errno(status);
494 goto bail;
495 }
496
497 handle = ocfs2_start_trans(osb, NULL, OCFS2_DELETE_INODE_CREDITS);
498 if (IS_ERR(handle)) {
499 status = PTR_ERR(handle);
500 mlog_errno(status);
501 goto bail_unlock;
502 }
503
504 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
505 orphan_dir_bh);
506 if (status < 0) {
507 mlog_errno(status);
508 goto bail_commit;
509 }
510
511 /* set the inodes dtime */
512 status = ocfs2_journal_access(handle, inode, di_bh,
513 OCFS2_JOURNAL_ACCESS_WRITE);
514 if (status < 0) {
515 mlog_errno(status);
516 goto bail_commit;
517 }
518
519 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
520 le32_and_cpu(&di->i_flags, ~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
521
522 status = ocfs2_journal_dirty(handle, di_bh);
523 if (status < 0) {
524 mlog_errno(status);
525 goto bail_commit;
526 }
527
528 ocfs2_remove_from_cache(inode, di_bh);
529
530 status = ocfs2_free_dinode(handle, inode_alloc_inode,
531 inode_alloc_bh, di);
532 if (status < 0)
533 mlog_errno(status);
534
535bail_commit:
536 ocfs2_commit_trans(handle);
537bail_unlock:
538 ocfs2_meta_unlock(inode_alloc_inode, 1);
539 up(&inode_alloc_inode->i_sem);
540 brelse(inode_alloc_bh);
541bail:
542 iput(inode_alloc_inode);
543
544 return status;
545}
546
547static int ocfs2_wipe_inode(struct inode *inode,
548 struct buffer_head *di_bh)
549{
550 int status, orphaned_slot;
551 struct inode *orphan_dir_inode = NULL;
552 struct buffer_head *orphan_dir_bh = NULL;
553 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
554
555 /* We've already voted on this so it should be readonly - no
556 * spinlock needed. */
557 orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot;
558 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
559 ORPHAN_DIR_SYSTEM_INODE,
560 orphaned_slot);
561 if (!orphan_dir_inode) {
562 status = -EEXIST;
563 mlog_errno(status);
564 goto bail;
565 }
566
567 /* Lock the orphan dir. The lock will be held for the entire
568 * delete_inode operation. We do this now to avoid races with
569 * recovery completion on other nodes. */
570 down(&orphan_dir_inode->i_sem);
571 status = ocfs2_meta_lock(orphan_dir_inode, NULL, &orphan_dir_bh, 1);
572 if (status < 0) {
573 up(&orphan_dir_inode->i_sem);
574
575 mlog_errno(status);
576 goto bail;
577 }
578
579 /* we do this while holding the orphan dir lock because we
580 * don't want recovery being run from another node to vote for
581 * an inode delete on us -- this will result in two nodes
582 * truncating the same file! */
583 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
584 if (status < 0) {
585 mlog_errno(status);
586 goto bail_unlock_dir;
587 }
588
589 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
590 orphan_dir_bh);
591 if (status < 0)
592 mlog_errno(status);
593
594bail_unlock_dir:
595 ocfs2_meta_unlock(orphan_dir_inode, 1);
596 up(&orphan_dir_inode->i_sem);
597 brelse(orphan_dir_bh);
598bail:
599 iput(orphan_dir_inode);
600
601 return status;
602}
603
604/* There is a series of simple checks that should be done before a
605 * vote is even considered. Encapsulate those in this function. */
606static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
607{
608 int ret = 0;
609 struct ocfs2_inode_info *oi = OCFS2_I(inode);
610 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
611
612 /* We shouldn't be getting here for the root directory
613 * inode.. */
614 if (inode == osb->root_inode) {
615 mlog(ML_ERROR, "Skipping delete of root inode.\n");
616 goto bail;
617 }
618
619 /* If we're coming from process_vote we can't go into our own
620 * voting [hello, deadlock city!], so unforuntately we just
621 * have to skip deleting this guy. That's OK though because
622 * the node who's doing the actual deleting should handle it
623 * anyway. */
624 if (current == osb->vote_task) {
625 mlog(0, "Skipping delete of %lu because we're currently "
626 "in process_vote\n", inode->i_ino);
627 goto bail;
628 }
629
630 spin_lock(&oi->ip_lock);
631 /* OCFS2 *never* deletes system files. This should technically
632 * never get here as system file inodes should always have a
633 * positive link count. */
634 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
635 mlog(ML_ERROR, "Skipping delete of system file %"MLFu64".\n",
636 oi->ip_blkno);
637 goto bail_unlock;
638 }
639
640 /* If we have voted "yes" on the wipe of this inode for
641 * another node, it will be marked here so we can safely skip
642 * it. Recovery will cleanup any inodes we might inadvertantly
643 * skip here. */
644 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
645 mlog(0, "Skipping delete of %lu because another node "
646 "has done this for us.\n", inode->i_ino);
647 goto bail_unlock;
648 }
649
650 ret = 1;
651bail_unlock:
652 spin_unlock(&oi->ip_lock);
653bail:
654 return ret;
655}
656
657/* Query the cluster to determine whether we should wipe an inode from
658 * disk or not.
659 *
660 * Requires the inode to have the cluster lock. */
661static int ocfs2_query_inode_wipe(struct inode *inode,
662 struct buffer_head *di_bh,
663 int *wipe)
664{
665 int status = 0;
666 struct ocfs2_inode_info *oi = OCFS2_I(inode);
667 struct ocfs2_dinode *di;
668
669 *wipe = 0;
670
671 /* While we were waiting for the cluster lock in
672 * ocfs2_delete_inode, another node might have asked to delete
673 * the inode. Recheck our flags to catch this. */
674 if (!ocfs2_inode_is_valid_to_delete(inode)) {
675 mlog(0, "Skipping delete of %"MLFu64" because flags changed\n",
676 oi->ip_blkno);
677 goto bail;
678 }
679
680 /* Now that we have an up to date inode, we can double check
681 * the link count. */
682 if (inode->i_nlink) {
683 mlog(0, "Skipping delete of %"MLFu64" because nlink = %u\n",
684 oi->ip_blkno, inode->i_nlink);
685 goto bail;
686 }
687
688 /* Do some basic inode verification... */
689 di = (struct ocfs2_dinode *) di_bh->b_data;
690 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
691 /* for lack of a better error? */
692 status = -EEXIST;
693 mlog(ML_ERROR,
694 "Inode %"MLFu64" (on-disk %"MLFu64") not orphaned! "
695 "Disk flags 0x%x, inode flags 0x%x\n",
696 oi->ip_blkno, di->i_blkno, di->i_flags, oi->ip_flags);
697 goto bail;
698 }
699
700 /* has someone already deleted us?! baaad... */
701 if (di->i_dtime) {
702 status = -EEXIST;
703 mlog_errno(status);
704 goto bail;
705 }
706
707 status = ocfs2_request_delete_vote(inode);
708 /* -EBUSY means that other nodes are still using the
709 * inode. We're done here though, so avoid doing anything on
710 * disk and let them worry about deleting it. */
711 if (status == -EBUSY) {
712 status = 0;
713 mlog(0, "Skipping delete of %"MLFu64" because it is in use on"
714 "other nodes\n", oi->ip_blkno);
715 goto bail;
716 }
717 if (status < 0) {
718 mlog_errno(status);
719 goto bail;
720 }
721
722 spin_lock(&oi->ip_lock);
723 if (oi->ip_orphaned_slot == OCFS2_INVALID_SLOT) {
724 /* Nobody knew which slot this inode was orphaned
725 * into. This may happen during node death and
726 * recovery knows how to clean it up so we can safely
727 * ignore this inode for now on. */
728 mlog(0, "Nobody knew where inode %"MLFu64" was orphaned!\n",
729 oi->ip_blkno);
730 } else {
731 *wipe = 1;
732
733 mlog(0, "Inode %"MLFu64" is ok to wipe from orphan dir %d\n",
734 oi->ip_blkno, oi->ip_orphaned_slot);
735 }
736 spin_unlock(&oi->ip_lock);
737
738bail:
739 return status;
740}
741
742/* Support function for ocfs2_delete_inode. Will help us keep the
743 * inode data in a consistent state for clear_inode. Always truncates
744 * pages, optionally sync's them first. */
745static void ocfs2_cleanup_delete_inode(struct inode *inode,
746 int sync_data)
747{
748 mlog(0, "Cleanup inode %"MLFu64", sync = %d\n",
749 OCFS2_I(inode)->ip_blkno, sync_data);
750 if (sync_data)
751 write_inode_now(inode, 1);
752 truncate_inode_pages(&inode->i_data, 0);
753}
754
755void ocfs2_delete_inode(struct inode *inode)
756{
757 int wipe, status;
758 sigset_t blocked, oldset;
759 struct buffer_head *di_bh = NULL;
760
761 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
762
763 if (is_bad_inode(inode)) {
764 mlog(0, "Skipping delete of bad inode\n");
765 goto bail;
766 }
767
768 if (!ocfs2_inode_is_valid_to_delete(inode)) {
769 /* It's probably not necessary to truncate_inode_pages
770 * here but we do it for safety anyway (it will most
771 * likely be a no-op anyway) */
772 ocfs2_cleanup_delete_inode(inode, 0);
773 goto bail;
774 }
775
776 /* We want to block signals in delete_inode as the lock and
777 * messaging paths may return us -ERESTARTSYS. Which would
778 * cause us to exit early, resulting in inodes being orphaned
779 * forever. */
780 sigfillset(&blocked);
781 status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
782 if (status < 0) {
783 mlog_errno(status);
784 ocfs2_cleanup_delete_inode(inode, 1);
785 goto bail;
786 }
787
788 /* Lock down the inode. This gives us an up to date view of
789 * it's metadata (for verification), and allows us to
790 * serialize delete_inode votes.
791 *
792 * Even though we might be doing a truncate, we don't take the
793 * allocation lock here as it won't be needed - nobody will
794 * have the file open.
795 */
796 status = ocfs2_meta_lock(inode, NULL, &di_bh, 1);
797 if (status < 0) {
798 if (status != -ENOENT)
799 mlog_errno(status);
800 ocfs2_cleanup_delete_inode(inode, 0);
801 goto bail_unblock;
802 }
803
804 /* Query the cluster. This will be the final decision made
805 * before we go ahead and wipe the inode. */
806 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
807 if (!wipe || status < 0) {
808 /* Error and inode busy vote both mean we won't be
809 * removing the inode, so they take almost the same
810 * path. */
811 if (status < 0)
812 mlog_errno(status);
813
814 /* Someone in the cluster has voted to not wipe this
815 * inode, or it was never completely orphaned. Write
816 * out the pages and exit now. */
817 ocfs2_cleanup_delete_inode(inode, 1);
818 goto bail_unlock_inode;
819 }
820
821 ocfs2_cleanup_delete_inode(inode, 0);
822
823 status = ocfs2_wipe_inode(inode, di_bh);
824 if (status < 0) {
825 mlog_errno(status);
826 goto bail_unlock_inode;
827 }
828
829 /* Mark the inode as successfully deleted. This is important
830 * for ocfs2_clear_inode as it will check this flag and skip
831 * any checkpointing work */
832 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
833
834bail_unlock_inode:
835 ocfs2_meta_unlock(inode, 1);
836 brelse(di_bh);
837bail_unblock:
838 status = sigprocmask(SIG_SETMASK, &oldset, NULL);
839 if (status < 0)
840 mlog_errno(status);
841bail:
842 clear_inode(inode);
843 mlog_exit_void();
844}
845
846void ocfs2_clear_inode(struct inode *inode)
847{
848 int status;
849 struct ocfs2_inode_info *oi = OCFS2_I(inode);
850
851 mlog_entry_void();
852
853 if (!inode)
854 goto bail;
855
856 mlog(0, "Clearing inode: %"MLFu64", nlink = %u\n",
857 OCFS2_I(inode)->ip_blkno, inode->i_nlink);
858
859 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
860 "Inode=%lu\n", inode->i_ino);
861
862 /* Do these before all the other work so that we don't bounce
863 * the vote thread while waiting to destroy the locks. */
864 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
865 ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres);
866 ocfs2_mark_lockres_freeing(&oi->ip_data_lockres);
867
868 /* We very well may get a clear_inode before all an inodes
869 * metadata has hit disk. Of course, we can't drop any cluster
870 * locks until the journal has finished with it. The only
871 * exception here are successfully wiped inodes - their
872 * metadata can now be considered to be part of the system
873 * inodes from which it came. */
874 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
875 ocfs2_checkpoint_inode(inode);
876
877 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
878 "Clear inode of %"MLFu64", inode has io markers\n",
879 oi->ip_blkno);
880
881 ocfs2_extent_map_drop(inode, 0);
882 ocfs2_extent_map_init(inode);
883
884 status = ocfs2_drop_inode_locks(inode);
885 if (status < 0)
886 mlog_errno(status);
887
888 ocfs2_lock_res_free(&oi->ip_rw_lockres);
889 ocfs2_lock_res_free(&oi->ip_meta_lockres);
890 ocfs2_lock_res_free(&oi->ip_data_lockres);
891
892 ocfs2_metadata_cache_purge(inode);
893
894 mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached,
895 "Clear inode of %"MLFu64", inode has %u cache items\n",
896 oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached);
897
898 mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
899 "Clear inode of %"MLFu64", inode has a bad flag\n",
900 oi->ip_blkno);
901
902 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
903 "Clear inode of %"MLFu64", inode is locked\n",
904 oi->ip_blkno);
905
906 mlog_bug_on_msg(down_trylock(&oi->ip_io_sem),
907 "Clear inode of %"MLFu64", io_sem is locked\n",
908 oi->ip_blkno);
909 up(&oi->ip_io_sem);
910
911 /*
912 * down_trylock() returns 0, down_write_trylock() returns 1
913 * kernel 1, world 0
914 */
915 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
916 "Clear inode of %"MLFu64", alloc_sem is locked\n",
917 oi->ip_blkno);
918 up_write(&oi->ip_alloc_sem);
919
920 mlog_bug_on_msg(oi->ip_open_count,
921 "Clear inode of %"MLFu64" has open count %d\n",
922 oi->ip_blkno, oi->ip_open_count);
923 mlog_bug_on_msg(!list_empty(&oi->ip_handle_list),
924 "Clear inode of %"MLFu64" has non empty handle list\n",
925 oi->ip_blkno);
926 mlog_bug_on_msg(oi->ip_handle,
927 "Clear inode of %"MLFu64" has non empty handle pointer\n",
928 oi->ip_blkno);
929
930 /* Clear all other flags. */
931 oi->ip_flags = OCFS2_INODE_CACHE_INLINE;
932 oi->ip_created_trans = 0;
933 oi->ip_last_trans = 0;
934 oi->ip_dir_start_lookup = 0;
935 oi->ip_blkno = 0ULL;
936
937bail:
938 mlog_exit_void();
939}
940
941/* Called under inode_lock, with no more references on the
942 * struct inode, so it's safe here to check the flags field
943 * and to manipulate i_nlink without any other locks. */
944void ocfs2_drop_inode(struct inode *inode)
945{
946 struct ocfs2_inode_info *oi = OCFS2_I(inode);
947
948 mlog_entry_void();
949
950 mlog(0, "Drop inode %"MLFu64", nlink = %u, ip_flags = 0x%x\n",
951 oi->ip_blkno, inode->i_nlink, oi->ip_flags);
952
953 /* Testing ip_orphaned_slot here wouldn't work because we may
954 * not have gotten a delete_inode vote from any other nodes
955 * yet. */
956 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED) {
957 mlog(0, "Inode was orphaned on another node, clearing nlink.\n");
958 inode->i_nlink = 0;
959 }
960
961 generic_drop_inode(inode);
962
963 mlog_exit_void();
964}
965
966/*
967 * TODO: this should probably be merged into ocfs2_get_block
968 *
969 * However, you now need to pay attention to the cont_prepare_write()
970 * stuff in ocfs2_get_block (that is, ocfs2_get_block pretty much
971 * expects never to extend).
972 */
973struct buffer_head *ocfs2_bread(struct inode *inode,
974 int block, int *err, int reada)
975{
976 struct buffer_head *bh = NULL;
977 int tmperr;
978 u64 p_blkno;
979 int readflags = OCFS2_BH_CACHED;
980
981#if 0
982 /* only turn this on if we know we can deal with read_block
983 * returning nothing */
984 if (reada)
985 readflags |= OCFS2_BH_READAHEAD;
986#endif
987
988 if (((u64)block << inode->i_sb->s_blocksize_bits) >=
989 i_size_read(inode)) {
990 BUG_ON(!reada);
991 return NULL;
992 }
993
994 tmperr = ocfs2_extent_map_get_blocks(inode, block, 1,
995 &p_blkno, NULL);
996 if (tmperr < 0) {
997 mlog_errno(tmperr);
998 goto fail;
999 }
1000
1001 tmperr = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, &bh,
1002 readflags, inode);
1003 if (tmperr < 0)
1004 goto fail;
1005
1006 tmperr = 0;
1007
1008 *err = 0;
1009 return bh;
1010
1011fail:
1012 if (bh) {
1013 brelse(bh);
1014 bh = NULL;
1015 }
1016 *err = -EIO;
1017 return NULL;
1018}
1019
1020/*
1021 * This is called from our getattr.
1022 */
1023int ocfs2_inode_revalidate(struct dentry *dentry)
1024{
1025 struct inode *inode = dentry->d_inode;
1026 int status = 0;
1027
1028 mlog_entry("(inode = 0x%p, ino = %"MLFu64")\n", inode,
1029 inode ? OCFS2_I(inode)->ip_blkno : 0ULL);
1030
1031 if (!inode) {
1032 mlog(0, "eep, no inode!\n");
1033 status = -ENOENT;
1034 goto bail;
1035 }
1036
1037 spin_lock(&OCFS2_I(inode)->ip_lock);
1038 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1039 spin_unlock(&OCFS2_I(inode)->ip_lock);
1040 mlog(0, "inode deleted!\n");
1041 status = -ENOENT;
1042 goto bail;
1043 }
1044 spin_unlock(&OCFS2_I(inode)->ip_lock);
1045
1046 /* Let ocfs2_meta_lock do the work of updating our struct
1047 * inode for us. */
1048 status = ocfs2_meta_lock(inode, NULL, NULL, 0);
1049 if (status < 0) {
1050 if (status != -ENOENT)
1051 mlog_errno(status);
1052 goto bail;
1053 }
1054 ocfs2_meta_unlock(inode, 0);
1055bail:
1056 mlog_exit(status);
1057
1058 return status;
1059}
1060
1061/*
1062 * Updates a disk inode from a
1063 * struct inode.
1064 * Only takes ip_lock.
1065 */
1066int ocfs2_mark_inode_dirty(struct ocfs2_journal_handle *handle,
1067 struct inode *inode,
1068 struct buffer_head *bh)
1069{
1070 int status;
1071 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1072
1073 mlog_entry("(inode %"MLFu64")\n", OCFS2_I(inode)->ip_blkno);
1074
1075 status = ocfs2_journal_access(handle, inode, bh,
1076 OCFS2_JOURNAL_ACCESS_WRITE);
1077 if (status < 0) {
1078 mlog_errno(status);
1079 goto leave;
1080 }
1081
1082 spin_lock(&OCFS2_I(inode)->ip_lock);
1083 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1084 spin_unlock(&OCFS2_I(inode)->ip_lock);
1085
1086 fe->i_size = cpu_to_le64(i_size_read(inode));
1087 fe->i_links_count = cpu_to_le16(inode->i_nlink);
1088 fe->i_uid = cpu_to_le32(inode->i_uid);
1089 fe->i_gid = cpu_to_le32(inode->i_gid);
1090 fe->i_mode = cpu_to_le16(inode->i_mode);
1091 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1092 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1093 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1094 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1095 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1096 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1097
1098 status = ocfs2_journal_dirty(handle, bh);
1099 if (status < 0)
1100 mlog_errno(status);
1101
1102 status = 0;
1103leave:
1104
1105 mlog_exit(status);
1106 return status;
1107}
1108
1109/*
1110 *
1111 * Updates a struct inode from a disk inode.
1112 * does no i/o, only takes ip_lock.
1113 */
1114void ocfs2_refresh_inode(struct inode *inode,
1115 struct ocfs2_dinode *fe)
1116{
1117 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1118
1119 spin_lock(&OCFS2_I(inode)->ip_lock);
1120
1121 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1122 i_size_write(inode, le64_to_cpu(fe->i_size));
1123 inode->i_nlink = le16_to_cpu(fe->i_links_count);
1124 inode->i_uid = le32_to_cpu(fe->i_uid);
1125 inode->i_gid = le32_to_cpu(fe->i_gid);
1126 inode->i_mode = le16_to_cpu(fe->i_mode);
1127 inode->i_blksize = (u32) osb->s_clustersize;
1128 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1129 inode->i_blocks = 0;
1130 else
1131 inode->i_blocks = ocfs2_align_bytes_to_sectors(i_size_read(inode));
1132 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1133 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1134 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1135 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1136 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1137 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1138
1139 spin_unlock(&OCFS2_I(inode)->ip_lock);
1140}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-03 19:08:08 -0500