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x86/cpu: Use pinning mask for CR4 bits needing to be 0
[linux/fpc-iii.git] / fs / f2fs / recovery.c
blob783773e4560de98a1db31e48a11c7ed89ccace62
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/recovery.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8 #include <linux/fs.h>
9 #include <linux/f2fs_fs.h>
10 #include "f2fs.h"
11 #include "node.h"
12 #include "segment.h"
13
14 /*
15 * Roll forward recovery scenarios.
16 *
17 * [Term] F: fsync_mark, D: dentry_mark
18 *
19 * 1. inode(x) | CP | inode(x) | dnode(F)
20 * -> Update the latest inode(x).
21 *
22 * 2. inode(x) | CP | inode(F) | dnode(F)
23 * -> No problem.
24 *
25 * 3. inode(x) | CP | dnode(F) | inode(x)
26 * -> Recover to the latest dnode(F), and drop the last inode(x)
27 *
28 * 4. inode(x) | CP | dnode(F) | inode(F)
29 * -> No problem.
30 *
31 * 5. CP | inode(x) | dnode(F)
32 * -> The inode(DF) was missing. Should drop this dnode(F).
33 *
34 * 6. CP | inode(DF) | dnode(F)
35 * -> No problem.
36 *
37 * 7. CP | dnode(F) | inode(DF)
38 * -> If f2fs_iget fails, then goto next to find inode(DF).
39 *
40 * 8. CP | dnode(F) | inode(x)
41 * -> If f2fs_iget fails, then goto next to find inode(DF).
42 * But it will fail due to no inode(DF).
43 */
44
45 static struct kmem_cache *fsync_entry_slab;
46
47 bool f2fs_space_for_roll_forward(struct f2fs_sb_info *sbi)
48 {
49 s64 nalloc = percpu_counter_sum_positive(&sbi->alloc_valid_block_count);
50
51 if (sbi->last_valid_block_count + nalloc > sbi->user_block_count)
52 return false;
53 return true;
54 }
55
56 static struct fsync_inode_entry *get_fsync_inode(struct list_head *head,
57 nid_t ino)
58 {
59 struct fsync_inode_entry *entry;
60
61 list_for_each_entry(entry, head, list)
62 if (entry->inode->i_ino == ino)
63 return entry;
64
65 return NULL;
66 }
67
68 static struct fsync_inode_entry *add_fsync_inode(struct f2fs_sb_info *sbi,
69 struct list_head *head, nid_t ino, bool quota_inode)
70 {
71 struct inode *inode;
72 struct fsync_inode_entry *entry;
73 int err;
74
75 inode = f2fs_iget_retry(sbi->sb, ino);
76 if (IS_ERR(inode))
77 return ERR_CAST(inode);
78
79 err = dquot_initialize(inode);
80 if (err)
81 goto err_out;
82
83 if (quota_inode) {
84 err = dquot_alloc_inode(inode);
85 if (err)
86 goto err_out;
87 }
88
89 entry = f2fs_kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO);
90 entry->inode = inode;
91 list_add_tail(&entry->list, head);
92
93 return entry;
94 err_out:
95 iput(inode);
96 return ERR_PTR(err);
97 }
98
99 static void del_fsync_inode(struct fsync_inode_entry *entry, int drop)
100 {
101 if (drop) {
102 /* inode should not be recovered, drop it */
103 f2fs_inode_synced(entry->inode);
104 }
105 iput(entry->inode);
106 list_del(&entry->list);
107 kmem_cache_free(fsync_entry_slab, entry);
108 }
109
110 static int recover_dentry(struct inode *inode, struct page *ipage,
111 struct list_head *dir_list)
112 {
113 struct f2fs_inode *raw_inode = F2FS_INODE(ipage);
114 nid_t pino = le32_to_cpu(raw_inode->i_pino);
115 struct f2fs_dir_entry *de;
116 struct fscrypt_name fname;
117 struct page *page;
118 struct inode *dir, *einode;
119 struct fsync_inode_entry *entry;
120 int err = 0;
121 char *name;
122
123 entry = get_fsync_inode(dir_list, pino);
124 if (!entry) {
125 entry = add_fsync_inode(F2FS_I_SB(inode), dir_list,
126 pino, false);
127 if (IS_ERR(entry)) {
128 dir = ERR_CAST(entry);
129 err = PTR_ERR(entry);
130 goto out;
131 }
132 }
133
134 dir = entry->inode;
135
136 memset(&fname, 0, sizeof(struct fscrypt_name));
137 fname.disk_name.len = le32_to_cpu(raw_inode->i_namelen);
138 fname.disk_name.name = raw_inode->i_name;
139
140 if (unlikely(fname.disk_name.len > F2FS_NAME_LEN)) {
141 WARN_ON(1);
142 err = -ENAMETOOLONG;
143 goto out;
144 }
145 retry:
146 de = __f2fs_find_entry(dir, &fname, &page);
147 if (de && inode->i_ino == le32_to_cpu(de->ino))
148 goto out_put;
149
150 if (de) {
151 einode = f2fs_iget_retry(inode->i_sb, le32_to_cpu(de->ino));
152 if (IS_ERR(einode)) {
153 WARN_ON(1);
154 err = PTR_ERR(einode);
155 if (err == -ENOENT)
156 err = -EEXIST;
157 goto out_put;
158 }
159
160 err = dquot_initialize(einode);
161 if (err) {
162 iput(einode);
163 goto out_put;
164 }
165
166 err = f2fs_acquire_orphan_inode(F2FS_I_SB(inode));
167 if (err) {
168 iput(einode);
169 goto out_put;
170 }
171 f2fs_delete_entry(de, page, dir, einode);
172 iput(einode);
173 goto retry;
174 } else if (IS_ERR(page)) {
175 err = PTR_ERR(page);
176 } else {
177 err = f2fs_add_dentry(dir, &fname, inode,
178 inode->i_ino, inode->i_mode);
179 }
180 if (err == -ENOMEM)
181 goto retry;
182 goto out;
183
184 out_put:
185 f2fs_put_page(page, 0);
186 out:
187 if (file_enc_name(inode))
188 name = "<encrypted>";
189 else
190 name = raw_inode->i_name;
191 f2fs_notice(F2FS_I_SB(inode), "%s: ino = %x, name = %s, dir = %lx, err = %d",
192 __func__, ino_of_node(ipage), name,
193 IS_ERR(dir) ? 0 : dir->i_ino, err);
194 return err;
195 }
196
197 static int recover_quota_data(struct inode *inode, struct page *page)
198 {
199 struct f2fs_inode *raw = F2FS_INODE(page);
200 struct iattr attr;
201 uid_t i_uid = le32_to_cpu(raw->i_uid);
202 gid_t i_gid = le32_to_cpu(raw->i_gid);
203 int err;
204
205 memset(&attr, 0, sizeof(attr));
206
207 attr.ia_uid = make_kuid(inode->i_sb->s_user_ns, i_uid);
208 attr.ia_gid = make_kgid(inode->i_sb->s_user_ns, i_gid);
209
210 if (!uid_eq(attr.ia_uid, inode->i_uid))
211 attr.ia_valid |= ATTR_UID;
212 if (!gid_eq(attr.ia_gid, inode->i_gid))
213 attr.ia_valid |= ATTR_GID;
214
215 if (!attr.ia_valid)
216 return 0;
217
218 err = dquot_transfer(inode, &attr);
219 if (err)
220 set_sbi_flag(F2FS_I_SB(inode), SBI_QUOTA_NEED_REPAIR);
221 return err;
222 }
223
224 static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri)
225 {
226 if (ri->i_inline & F2FS_PIN_FILE)
227 set_inode_flag(inode, FI_PIN_FILE);
228 else
229 clear_inode_flag(inode, FI_PIN_FILE);
230 if (ri->i_inline & F2FS_DATA_EXIST)
231 set_inode_flag(inode, FI_DATA_EXIST);
232 else
233 clear_inode_flag(inode, FI_DATA_EXIST);
234 }
235
236 static int recover_inode(struct inode *inode, struct page *page)
237 {
238 struct f2fs_inode *raw = F2FS_INODE(page);
239 char *name;
240 int err;
241
242 inode->i_mode = le16_to_cpu(raw->i_mode);
243
244 err = recover_quota_data(inode, page);
245 if (err)
246 return err;
247
248 i_uid_write(inode, le32_to_cpu(raw->i_uid));
249 i_gid_write(inode, le32_to_cpu(raw->i_gid));
250
251 if (raw->i_inline & F2FS_EXTRA_ATTR) {
252 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)) &&
253 F2FS_FITS_IN_INODE(raw, le16_to_cpu(raw->i_extra_isize),
254 i_projid)) {
255 projid_t i_projid;
256 kprojid_t kprojid;
257
258 i_projid = (projid_t)le32_to_cpu(raw->i_projid);
259 kprojid = make_kprojid(&init_user_ns, i_projid);
260
261 if (!projid_eq(kprojid, F2FS_I(inode)->i_projid)) {
262 err = f2fs_transfer_project_quota(inode,
263 kprojid);
264 if (err)
265 return err;
266 F2FS_I(inode)->i_projid = kprojid;
267 }
268 }
269 }
270
271 f2fs_i_size_write(inode, le64_to_cpu(raw->i_size));
272 inode->i_atime.tv_sec = le64_to_cpu(raw->i_atime);
273 inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime);
274 inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime);
275 inode->i_atime.tv_nsec = le32_to_cpu(raw->i_atime_nsec);
276 inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec);
277 inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec);
278
279 F2FS_I(inode)->i_advise = raw->i_advise;
280 F2FS_I(inode)->i_flags = le32_to_cpu(raw->i_flags);
281 f2fs_set_inode_flags(inode);
282 F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN] =
283 le16_to_cpu(raw->i_gc_failures);
284
285 recover_inline_flags(inode, raw);
286
287 f2fs_mark_inode_dirty_sync(inode, true);
288
289 if (file_enc_name(inode))
290 name = "<encrypted>";
291 else
292 name = F2FS_INODE(page)->i_name;
293
294 f2fs_notice(F2FS_I_SB(inode), "recover_inode: ino = %x, name = %s, inline = %x",
295 ino_of_node(page), name, raw->i_inline);
296 return 0;
297 }
298
299 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
300 bool check_only)
301 {
302 struct curseg_info *curseg;
303 struct page *page = NULL;
304 block_t blkaddr;
305 unsigned int loop_cnt = 0;
306 unsigned int free_blocks = MAIN_SEGS(sbi) * sbi->blocks_per_seg -
307 valid_user_blocks(sbi);
308 int err = 0;
309
310 /* get node pages in the current segment */
311 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
312 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
313
314 while (1) {
315 struct fsync_inode_entry *entry;
316
317 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR))
318 return 0;
319
320 page = f2fs_get_tmp_page(sbi, blkaddr);
321 if (IS_ERR(page)) {
322 err = PTR_ERR(page);
323 break;
324 }
325
326 if (!is_recoverable_dnode(page)) {
327 f2fs_put_page(page, 1);
328 break;
329 }
330
331 if (!is_fsync_dnode(page))
332 goto next;
333
334 entry = get_fsync_inode(head, ino_of_node(page));
335 if (!entry) {
336 bool quota_inode = false;
337
338 if (!check_only &&
339 IS_INODE(page) && is_dent_dnode(page)) {
340 err = f2fs_recover_inode_page(sbi, page);
341 if (err) {
342 f2fs_put_page(page, 1);
343 break;
344 }
345 quota_inode = true;
346 }
347
348 /*
349 * CP | dnode(F) | inode(DF)
350 * For this case, we should not give up now.
351 */
352 entry = add_fsync_inode(sbi, head, ino_of_node(page),
353 quota_inode);
354 if (IS_ERR(entry)) {
355 err = PTR_ERR(entry);
356 if (err == -ENOENT) {
357 err = 0;
358 goto next;
359 }
360 f2fs_put_page(page, 1);
361 break;
362 }
363 }
364 entry->blkaddr = blkaddr;
365
366 if (IS_INODE(page) && is_dent_dnode(page))
367 entry->last_dentry = blkaddr;
368 next:
369 /* sanity check in order to detect looped node chain */
370 if (++loop_cnt >= free_blocks ||
371 blkaddr == next_blkaddr_of_node(page)) {
372 f2fs_notice(sbi, "%s: detect looped node chain, blkaddr:%u, next:%u",
373 __func__, blkaddr,
374 next_blkaddr_of_node(page));
375 f2fs_put_page(page, 1);
376 err = -EINVAL;
377 break;
378 }
379
380 /* check next segment */
381 blkaddr = next_blkaddr_of_node(page);
382 f2fs_put_page(page, 1);
383
384 f2fs_ra_meta_pages_cond(sbi, blkaddr);
385 }
386 return err;
387 }
388
389 static void destroy_fsync_dnodes(struct list_head *head, int drop)
390 {
391 struct fsync_inode_entry *entry, *tmp;
392
393 list_for_each_entry_safe(entry, tmp, head, list)
394 del_fsync_inode(entry, drop);
395 }
396
397 static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
398 block_t blkaddr, struct dnode_of_data *dn)
399 {
400 struct seg_entry *sentry;
401 unsigned int segno = GET_SEGNO(sbi, blkaddr);
402 unsigned short blkoff = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
403 struct f2fs_summary_block *sum_node;
404 struct f2fs_summary sum;
405 struct page *sum_page, *node_page;
406 struct dnode_of_data tdn = *dn;
407 nid_t ino, nid;
408 struct inode *inode;
409 unsigned int offset;
410 block_t bidx;
411 int i;
412
413 sentry = get_seg_entry(sbi, segno);
414 if (!f2fs_test_bit(blkoff, sentry->cur_valid_map))
415 return 0;
416
417 /* Get the previous summary */
418 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
419 struct curseg_info *curseg = CURSEG_I(sbi, i);
420 if (curseg->segno == segno) {
421 sum = curseg->sum_blk->entries[blkoff];
422 goto got_it;
423 }
424 }
425
426 sum_page = f2fs_get_sum_page(sbi, segno);
427 if (IS_ERR(sum_page))
428 return PTR_ERR(sum_page);
429 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
430 sum = sum_node->entries[blkoff];
431 f2fs_put_page(sum_page, 1);
432 got_it:
433 /* Use the locked dnode page and inode */
434 nid = le32_to_cpu(sum.nid);
435 if (dn->inode->i_ino == nid) {
436 tdn.nid = nid;
437 if (!dn->inode_page_locked)
438 lock_page(dn->inode_page);
439 tdn.node_page = dn->inode_page;
440 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
441 goto truncate_out;
442 } else if (dn->nid == nid) {
443 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
444 goto truncate_out;
445 }
446
447 /* Get the node page */
448 node_page = f2fs_get_node_page(sbi, nid);
449 if (IS_ERR(node_page))
450 return PTR_ERR(node_page);
451
452 offset = ofs_of_node(node_page);
453 ino = ino_of_node(node_page);
454 f2fs_put_page(node_page, 1);
455
456 if (ino != dn->inode->i_ino) {
457 int ret;
458
459 /* Deallocate previous index in the node page */
460 inode = f2fs_iget_retry(sbi->sb, ino);
461 if (IS_ERR(inode))
462 return PTR_ERR(inode);
463
464 ret = dquot_initialize(inode);
465 if (ret) {
466 iput(inode);
467 return ret;
468 }
469 } else {
470 inode = dn->inode;
471 }
472
473 bidx = f2fs_start_bidx_of_node(offset, inode) +
474 le16_to_cpu(sum.ofs_in_node);
475
476 /*
477 * if inode page is locked, unlock temporarily, but its reference
478 * count keeps alive.
479 */
480 if (ino == dn->inode->i_ino && dn->inode_page_locked)
481 unlock_page(dn->inode_page);
482
483 set_new_dnode(&tdn, inode, NULL, NULL, 0);
484 if (f2fs_get_dnode_of_data(&tdn, bidx, LOOKUP_NODE))
485 goto out;
486
487 if (tdn.data_blkaddr == blkaddr)
488 f2fs_truncate_data_blocks_range(&tdn, 1);
489
490 f2fs_put_dnode(&tdn);
491 out:
492 if (ino != dn->inode->i_ino)
493 iput(inode);
494 else if (dn->inode_page_locked)
495 lock_page(dn->inode_page);
496 return 0;
497
498 truncate_out:
499 if (datablock_addr(tdn.inode, tdn.node_page,
500 tdn.ofs_in_node) == blkaddr)
501 f2fs_truncate_data_blocks_range(&tdn, 1);
502 if (dn->inode->i_ino == nid && !dn->inode_page_locked)
503 unlock_page(dn->inode_page);
504 return 0;
505 }
506
507 static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
508 struct page *page)
509 {
510 struct dnode_of_data dn;
511 struct node_info ni;
512 unsigned int start, end;
513 int err = 0, recovered = 0;
514
515 /* step 1: recover xattr */
516 if (IS_INODE(page)) {
517 f2fs_recover_inline_xattr(inode, page);
518 } else if (f2fs_has_xattr_block(ofs_of_node(page))) {
519 err = f2fs_recover_xattr_data(inode, page);
520 if (!err)
521 recovered++;
522 goto out;
523 }
524
525 /* step 2: recover inline data */
526 if (f2fs_recover_inline_data(inode, page))
527 goto out;
528
529 /* step 3: recover data indices */
530 start = f2fs_start_bidx_of_node(ofs_of_node(page), inode);
531 end = start + ADDRS_PER_PAGE(page, inode);
532
533 set_new_dnode(&dn, inode, NULL, NULL, 0);
534 retry_dn:
535 err = f2fs_get_dnode_of_data(&dn, start, ALLOC_NODE);
536 if (err) {
537 if (err == -ENOMEM) {
538 congestion_wait(BLK_RW_ASYNC, HZ/50);
539 goto retry_dn;
540 }
541 goto out;
542 }
543
544 f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true);
545
546 err = f2fs_get_node_info(sbi, dn.nid, &ni);
547 if (err)
548 goto err;
549
550 f2fs_bug_on(sbi, ni.ino != ino_of_node(page));
551
552 if (ofs_of_node(dn.node_page) != ofs_of_node(page)) {
553 f2fs_warn(sbi, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u",
554 inode->i_ino, ofs_of_node(dn.node_page),
555 ofs_of_node(page));
556 err = -EFSCORRUPTED;
557 goto err;
558 }
559
560 for (; start < end; start++, dn.ofs_in_node++) {
561 block_t src, dest;
562
563 src = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
564 dest = datablock_addr(dn.inode, page, dn.ofs_in_node);
565
566 if (__is_valid_data_blkaddr(src) &&
567 !f2fs_is_valid_blkaddr(sbi, src, META_POR)) {
568 err = -EFSCORRUPTED;
569 goto err;
570 }
571
572 if (__is_valid_data_blkaddr(dest) &&
573 !f2fs_is_valid_blkaddr(sbi, dest, META_POR)) {
574 err = -EFSCORRUPTED;
575 goto err;
576 }
577
578 /* skip recovering if dest is the same as src */
579 if (src == dest)
580 continue;
581
582 /* dest is invalid, just invalidate src block */
583 if (dest == NULL_ADDR) {
584 f2fs_truncate_data_blocks_range(&dn, 1);
585 continue;
586 }
587
588 if (!file_keep_isize(inode) &&
589 (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT)))
590 f2fs_i_size_write(inode,
591 (loff_t)(start + 1) << PAGE_SHIFT);
592
593 /*
594 * dest is reserved block, invalidate src block
595 * and then reserve one new block in dnode page.
596 */
597 if (dest == NEW_ADDR) {
598 f2fs_truncate_data_blocks_range(&dn, 1);
599 f2fs_reserve_new_block(&dn);
600 continue;
601 }
602
603 /* dest is valid block, try to recover from src to dest */
604 if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) {
605
606 if (src == NULL_ADDR) {
607 err = f2fs_reserve_new_block(&dn);
608 while (err &&
609 IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION))
610 err = f2fs_reserve_new_block(&dn);
611 /* We should not get -ENOSPC */
612 f2fs_bug_on(sbi, err);
613 if (err)
614 goto err;
615 }
616 retry_prev:
617 /* Check the previous node page having this index */
618 err = check_index_in_prev_nodes(sbi, dest, &dn);
619 if (err) {
620 if (err == -ENOMEM) {
621 congestion_wait(BLK_RW_ASYNC, HZ/50);
622 goto retry_prev;
623 }
624 goto err;
625 }
626
627 /* write dummy data page */
628 f2fs_replace_block(sbi, &dn, src, dest,
629 ni.version, false, false);
630 recovered++;
631 }
632 }
633
634 copy_node_footer(dn.node_page, page);
635 fill_node_footer(dn.node_page, dn.nid, ni.ino,
636 ofs_of_node(page), false);
637 set_page_dirty(dn.node_page);
638 err:
639 f2fs_put_dnode(&dn);
640 out:
641 f2fs_notice(sbi, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d",
642 inode->i_ino, file_keep_isize(inode) ? "keep" : "recover",
643 recovered, err);
644 return err;
645 }
646
647 static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list,
648 struct list_head *tmp_inode_list, struct list_head *dir_list)
649 {
650 struct curseg_info *curseg;
651 struct page *page = NULL;
652 int err = 0;
653 block_t blkaddr;
654
655 /* get node pages in the current segment */
656 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
657 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
658
659 while (1) {
660 struct fsync_inode_entry *entry;
661
662 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR))
663 break;
664
665 f2fs_ra_meta_pages_cond(sbi, blkaddr);
666
667 page = f2fs_get_tmp_page(sbi, blkaddr);
668 if (IS_ERR(page)) {
669 err = PTR_ERR(page);
670 break;
671 }
672
673 if (!is_recoverable_dnode(page)) {
674 f2fs_put_page(page, 1);
675 break;
676 }
677
678 entry = get_fsync_inode(inode_list, ino_of_node(page));
679 if (!entry)
680 goto next;
681 /*
682 * inode(x) | CP | inode(x) | dnode(F)
683 * In this case, we can lose the latest inode(x).
684 * So, call recover_inode for the inode update.
685 */
686 if (IS_INODE(page)) {
687 err = recover_inode(entry->inode, page);
688 if (err) {
689 f2fs_put_page(page, 1);
690 break;
691 }
692 }
693 if (entry->last_dentry == blkaddr) {
694 err = recover_dentry(entry->inode, page, dir_list);
695 if (err) {
696 f2fs_put_page(page, 1);
697 break;
698 }
699 }
700 err = do_recover_data(sbi, entry->inode, page);
701 if (err) {
702 f2fs_put_page(page, 1);
703 break;
704 }
705
706 if (entry->blkaddr == blkaddr)
707 list_move_tail(&entry->list, tmp_inode_list);
708 next:
709 /* check next segment */
710 blkaddr = next_blkaddr_of_node(page);
711 f2fs_put_page(page, 1);
712 }
713 if (!err)
714 f2fs_allocate_new_segments(sbi);
715 return err;
716 }
717
718 int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
719 {
720 struct list_head inode_list, tmp_inode_list;
721 struct list_head dir_list;
722 int err;
723 int ret = 0;
724 unsigned long s_flags = sbi->sb->s_flags;
725 bool need_writecp = false;
726 #ifdef CONFIG_QUOTA
727 int quota_enabled;
728 #endif
729
730 if (s_flags & SB_RDONLY) {
731 f2fs_info(sbi, "recover fsync data on readonly fs");
732 sbi->sb->s_flags &= ~SB_RDONLY;
733 }
734
735 #ifdef CONFIG_QUOTA
736 /* Needed for iput() to work correctly and not trash data */
737 sbi->sb->s_flags |= SB_ACTIVE;
738 /* Turn on quotas so that they are updated correctly */
739 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
740 #endif
741
742 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
743 sizeof(struct fsync_inode_entry));
744 if (!fsync_entry_slab) {
745 err = -ENOMEM;
746 goto out;
747 }
748
749 INIT_LIST_HEAD(&inode_list);
750 INIT_LIST_HEAD(&tmp_inode_list);
751 INIT_LIST_HEAD(&dir_list);
752
753 /* prevent checkpoint */
754 mutex_lock(&sbi->cp_mutex);
755
756 /* step #1: find fsynced inode numbers */
757 err = find_fsync_dnodes(sbi, &inode_list, check_only);
758 if (err || list_empty(&inode_list))
759 goto skip;
760
761 if (check_only) {
762 ret = 1;
763 goto skip;
764 }
765
766 need_writecp = true;
767
768 /* step #2: recover data */
769 err = recover_data(sbi, &inode_list, &tmp_inode_list, &dir_list);
770 if (!err)
771 f2fs_bug_on(sbi, !list_empty(&inode_list));
772 else {
773 /* restore s_flags to let iput() trash data */
774 sbi->sb->s_flags = s_flags;
775 }
776 skip:
777 destroy_fsync_dnodes(&inode_list, err);
778 destroy_fsync_dnodes(&tmp_inode_list, err);
779
780 /* truncate meta pages to be used by the recovery */
781 truncate_inode_pages_range(META_MAPPING(sbi),
782 (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1);
783
784 if (err) {
785 truncate_inode_pages_final(NODE_MAPPING(sbi));
786 truncate_inode_pages_final(META_MAPPING(sbi));
787 } else {
788 clear_sbi_flag(sbi, SBI_POR_DOING);
789 }
790 mutex_unlock(&sbi->cp_mutex);
791
792 /* let's drop all the directory inodes for clean checkpoint */
793 destroy_fsync_dnodes(&dir_list, err);
794
795 if (need_writecp) {
796 set_sbi_flag(sbi, SBI_IS_RECOVERED);
797
798 if (!err) {
799 struct cp_control cpc = {
800 .reason = CP_RECOVERY,
801 };
802 err = f2fs_write_checkpoint(sbi, &cpc);
803 }
804 }
805
806 kmem_cache_destroy(fsync_entry_slab);
807 out:
808 #ifdef CONFIG_QUOTA
809 /* Turn quotas off */
810 if (quota_enabled)
811 f2fs_quota_off_umount(sbi->sb);
812 #endif
813 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
814
815 return ret ? ret: err;
816 }
Linux with added FPC-III support