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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
45static struct kmem_cache *fsync_entry_slab;
46
47bool 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
56static 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
68static 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;
94err_out:
95 iput(inode);
96 return ERR_PTR(err);
97}
98
99static 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
110static int init_recovered_filename(const struct inode *dir,
111 struct f2fs_inode *raw_inode,
112 struct f2fs_filename *fname,
113 struct qstr *usr_fname)
114{
115 int err;
116
117 memset(fname, 0, sizeof(*fname));
118 fname->disk_name.len = le32_to_cpu(raw_inode->i_namelen);
119 fname->disk_name.name = raw_inode->i_name;
120
121 if (WARN_ON(fname->disk_name.len > F2FS_NAME_LEN))
122 return -ENAMETOOLONG;
123
124 if (!IS_ENCRYPTED(dir)) {
125 usr_fname->name = fname->disk_name.name;
126 usr_fname->len = fname->disk_name.len;
127 fname->usr_fname = usr_fname;
128 }
129
130 /* Compute the hash of the filename */
131 if (IS_CASEFOLDED(dir)) {
132 err = f2fs_init_casefolded_name(dir, fname);
133 if (err)
134 return err;
135 f2fs_hash_filename(dir, fname);
136#ifdef CONFIG_UNICODE
137 /* Case-sensitive match is fine for recovery */
138 kfree(fname->cf_name.name);
139 fname->cf_name.name = NULL;
140#endif
141 } else {
142 f2fs_hash_filename(dir, fname);
143 }
144 return 0;
145}
146
147static int recover_dentry(struct inode *inode, struct page *ipage,
148 struct list_head *dir_list)
149{
150 struct f2fs_inode *raw_inode = F2FS_INODE(ipage);
151 nid_t pino = le32_to_cpu(raw_inode->i_pino);
152 struct f2fs_dir_entry *de;
153 struct f2fs_filename fname;
154 struct qstr usr_fname;
155 struct page *page;
156 struct inode *dir, *einode;
157 struct fsync_inode_entry *entry;
158 int err = 0;
159 char *name;
160
161 entry = get_fsync_inode(dir_list, pino);
162 if (!entry) {
163 entry = add_fsync_inode(F2FS_I_SB(inode), dir_list,
164 pino, false);
165 if (IS_ERR(entry)) {
166 dir = ERR_CAST(entry);
167 err = PTR_ERR(entry);
168 goto out;
169 }
170 }
171
172 dir = entry->inode;
173 err = init_recovered_filename(dir, raw_inode, &fname, &usr_fname);
174 if (err)
175 goto out;
176retry:
177 de = __f2fs_find_entry(dir, &fname, &page);
178 if (de && inode->i_ino == le32_to_cpu(de->ino))
179 goto out_put;
180
181 if (de) {
182 einode = f2fs_iget_retry(inode->i_sb, le32_to_cpu(de->ino));
183 if (IS_ERR(einode)) {
184 WARN_ON(1);
185 err = PTR_ERR(einode);
186 if (err == -ENOENT)
187 err = -EEXIST;
188 goto out_put;
189 }
190
191 err = dquot_initialize(einode);
192 if (err) {
193 iput(einode);
194 goto out_put;
195 }
196
197 err = f2fs_acquire_orphan_inode(F2FS_I_SB(inode));
198 if (err) {
199 iput(einode);
200 goto out_put;
201 }
202 f2fs_delete_entry(de, page, dir, einode);
203 iput(einode);
204 goto retry;
205 } else if (IS_ERR(page)) {
206 err = PTR_ERR(page);
207 } else {
208 err = f2fs_add_dentry(dir, &fname, inode,
209 inode->i_ino, inode->i_mode);
210 }
211 if (err == -ENOMEM)
212 goto retry;
213 goto out;
214
215out_put:
216 f2fs_put_page(page, 0);
217out:
218 if (file_enc_name(inode))
219 name = "<encrypted>";
220 else
221 name = raw_inode->i_name;
222 f2fs_notice(F2FS_I_SB(inode), "%s: ino = %x, name = %s, dir = %lx, err = %d",
223 __func__, ino_of_node(ipage), name,
224 IS_ERR(dir) ? 0 : dir->i_ino, err);
225 return err;
226}
227
228static int recover_quota_data(struct inode *inode, struct page *page)
229{
230 struct f2fs_inode *raw = F2FS_INODE(page);
231 struct iattr attr;
232 uid_t i_uid = le32_to_cpu(raw->i_uid);
233 gid_t i_gid = le32_to_cpu(raw->i_gid);
234 int err;
235
236 memset(&attr, 0, sizeof(attr));
237
238 attr.ia_uid = make_kuid(inode->i_sb->s_user_ns, i_uid);
239 attr.ia_gid = make_kgid(inode->i_sb->s_user_ns, i_gid);
240
241 if (!uid_eq(attr.ia_uid, inode->i_uid))
242 attr.ia_valid |= ATTR_UID;
243 if (!gid_eq(attr.ia_gid, inode->i_gid))
244 attr.ia_valid |= ATTR_GID;
245
246 if (!attr.ia_valid)
247 return 0;
248
249 err = dquot_transfer(inode, &attr);
250 if (err)
251 set_sbi_flag(F2FS_I_SB(inode), SBI_QUOTA_NEED_REPAIR);
252 return err;
253}
254
255static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri)
256{
257 if (ri->i_inline & F2FS_PIN_FILE)
258 set_inode_flag(inode, FI_PIN_FILE);
259 else
260 clear_inode_flag(inode, FI_PIN_FILE);
261 if (ri->i_inline & F2FS_DATA_EXIST)
262 set_inode_flag(inode, FI_DATA_EXIST);
263 else
264 clear_inode_flag(inode, FI_DATA_EXIST);
265}
266
267static int recover_inode(struct inode *inode, struct page *page)
268{
269 struct f2fs_inode *raw = F2FS_INODE(page);
270 char *name;
271 int err;
272
273 inode->i_mode = le16_to_cpu(raw->i_mode);
274
275 err = recover_quota_data(inode, page);
276 if (err)
277 return err;
278
279 i_uid_write(inode, le32_to_cpu(raw->i_uid));
280 i_gid_write(inode, le32_to_cpu(raw->i_gid));
281
282 if (raw->i_inline & F2FS_EXTRA_ATTR) {
283 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)) &&
284 F2FS_FITS_IN_INODE(raw, le16_to_cpu(raw->i_extra_isize),
285 i_projid)) {
286 projid_t i_projid;
287 kprojid_t kprojid;
288
289 i_projid = (projid_t)le32_to_cpu(raw->i_projid);
290 kprojid = make_kprojid(&init_user_ns, i_projid);
291
292 if (!projid_eq(kprojid, F2FS_I(inode)->i_projid)) {
293 err = f2fs_transfer_project_quota(inode,
294 kprojid);
295 if (err)
296 return err;
297 F2FS_I(inode)->i_projid = kprojid;
298 }
299 }
300 }
301
302 f2fs_i_size_write(inode, le64_to_cpu(raw->i_size));
303 inode->i_atime.tv_sec = le64_to_cpu(raw->i_atime);
304 inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime);
305 inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime);
306 inode->i_atime.tv_nsec = le32_to_cpu(raw->i_atime_nsec);
307 inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec);
308 inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec);
309
310 F2FS_I(inode)->i_advise = raw->i_advise;
311 F2FS_I(inode)->i_flags = le32_to_cpu(raw->i_flags);
312 f2fs_set_inode_flags(inode);
313 F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN] =
314 le16_to_cpu(raw->i_gc_failures);
315
316 recover_inline_flags(inode, raw);
317
318 f2fs_mark_inode_dirty_sync(inode, true);
319
320 if (file_enc_name(inode))
321 name = "<encrypted>";
322 else
323 name = F2FS_INODE(page)->i_name;
324
325 f2fs_notice(F2FS_I_SB(inode), "recover_inode: ino = %x, name = %s, inline = %x",
326 ino_of_node(page), name, raw->i_inline);
327 return 0;
328}
329
330static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
331 bool check_only)
332{
333 struct curseg_info *curseg;
334 struct page *page = NULL;
335 block_t blkaddr;
336 unsigned int loop_cnt = 0;
337 unsigned int free_blocks = MAIN_SEGS(sbi) * sbi->blocks_per_seg -
338 valid_user_blocks(sbi);
339 int err = 0;
340
341 /* get node pages in the current segment */
342 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
343 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
344
345 while (1) {
346 struct fsync_inode_entry *entry;
347
348 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR))
349 return 0;
350
351 page = f2fs_get_tmp_page(sbi, blkaddr);
352 if (IS_ERR(page)) {
353 err = PTR_ERR(page);
354 break;
355 }
356
357 if (!is_recoverable_dnode(page)) {
358 f2fs_put_page(page, 1);
359 break;
360 }
361
362 if (!is_fsync_dnode(page))
363 goto next;
364
365 entry = get_fsync_inode(head, ino_of_node(page));
366 if (!entry) {
367 bool quota_inode = false;
368
369 if (!check_only &&
370 IS_INODE(page) && is_dent_dnode(page)) {
371 err = f2fs_recover_inode_page(sbi, page);
372 if (err) {
373 f2fs_put_page(page, 1);
374 break;
375 }
376 quota_inode = true;
377 }
378
379 /*
380 * CP | dnode(F) | inode(DF)
381 * For this case, we should not give up now.
382 */
383 entry = add_fsync_inode(sbi, head, ino_of_node(page),
384 quota_inode);
385 if (IS_ERR(entry)) {
386 err = PTR_ERR(entry);
387 if (err == -ENOENT) {
388 err = 0;
389 goto next;
390 }
391 f2fs_put_page(page, 1);
392 break;
393 }
394 }
395 entry->blkaddr = blkaddr;
396
397 if (IS_INODE(page) && is_dent_dnode(page))
398 entry->last_dentry = blkaddr;
399next:
400 /* sanity check in order to detect looped node chain */
401 if (++loop_cnt >= free_blocks ||
402 blkaddr == next_blkaddr_of_node(page)) {
403 f2fs_notice(sbi, "%s: detect looped node chain, blkaddr:%u, next:%u",
404 __func__, blkaddr,
405 next_blkaddr_of_node(page));
406 f2fs_put_page(page, 1);
407 err = -EINVAL;
408 break;
409 }
410
411 /* check next segment */
412 blkaddr = next_blkaddr_of_node(page);
413 f2fs_put_page(page, 1);
414
415 f2fs_ra_meta_pages_cond(sbi, blkaddr);
416 }
417 return err;
418}
419
420static void destroy_fsync_dnodes(struct list_head *head, int drop)
421{
422 struct fsync_inode_entry *entry, *tmp;
423
424 list_for_each_entry_safe(entry, tmp, head, list)
425 del_fsync_inode(entry, drop);
426}
427
428static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
429 block_t blkaddr, struct dnode_of_data *dn)
430{
431 struct seg_entry *sentry;
432 unsigned int segno = GET_SEGNO(sbi, blkaddr);
433 unsigned short blkoff = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
434 struct f2fs_summary_block *sum_node;
435 struct f2fs_summary sum;
436 struct page *sum_page, *node_page;
437 struct dnode_of_data tdn = *dn;
438 nid_t ino, nid;
439 struct inode *inode;
440 unsigned int offset;
441 block_t bidx;
442 int i;
443
444 sentry = get_seg_entry(sbi, segno);
445 if (!f2fs_test_bit(blkoff, sentry->cur_valid_map))
446 return 0;
447
448 /* Get the previous summary */
449 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
450 struct curseg_info *curseg = CURSEG_I(sbi, i);
451 if (curseg->segno == segno) {
452 sum = curseg->sum_blk->entries[blkoff];
453 goto got_it;
454 }
455 }
456
457 sum_page = f2fs_get_sum_page(sbi, segno);
458 if (IS_ERR(sum_page))
459 return PTR_ERR(sum_page);
460 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
461 sum = sum_node->entries[blkoff];
462 f2fs_put_page(sum_page, 1);
463got_it:
464 /* Use the locked dnode page and inode */
465 nid = le32_to_cpu(sum.nid);
466 if (dn->inode->i_ino == nid) {
467 tdn.nid = nid;
468 if (!dn->inode_page_locked)
469 lock_page(dn->inode_page);
470 tdn.node_page = dn->inode_page;
471 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
472 goto truncate_out;
473 } else if (dn->nid == nid) {
474 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
475 goto truncate_out;
476 }
477
478 /* Get the node page */
479 node_page = f2fs_get_node_page(sbi, nid);
480 if (IS_ERR(node_page))
481 return PTR_ERR(node_page);
482
483 offset = ofs_of_node(node_page);
484 ino = ino_of_node(node_page);
485 f2fs_put_page(node_page, 1);
486
487 if (ino != dn->inode->i_ino) {
488 int ret;
489
490 /* Deallocate previous index in the node page */
491 inode = f2fs_iget_retry(sbi->sb, ino);
492 if (IS_ERR(inode))
493 return PTR_ERR(inode);
494
495 ret = dquot_initialize(inode);
496 if (ret) {
497 iput(inode);
498 return ret;
499 }
500 } else {
501 inode = dn->inode;
502 }
503
504 bidx = f2fs_start_bidx_of_node(offset, inode) +
505 le16_to_cpu(sum.ofs_in_node);
506
507 /*
508 * if inode page is locked, unlock temporarily, but its reference
509 * count keeps alive.
510 */
511 if (ino == dn->inode->i_ino && dn->inode_page_locked)
512 unlock_page(dn->inode_page);
513
514 set_new_dnode(&tdn, inode, NULL, NULL, 0);
515 if (f2fs_get_dnode_of_data(&tdn, bidx, LOOKUP_NODE))
516 goto out;
517
518 if (tdn.data_blkaddr == blkaddr)
519 f2fs_truncate_data_blocks_range(&tdn, 1);
520
521 f2fs_put_dnode(&tdn);
522out:
523 if (ino != dn->inode->i_ino)
524 iput(inode);
525 else if (dn->inode_page_locked)
526 lock_page(dn->inode_page);
527 return 0;
528
529truncate_out:
530 if (f2fs_data_blkaddr(&tdn) == blkaddr)
531 f2fs_truncate_data_blocks_range(&tdn, 1);
532 if (dn->inode->i_ino == nid && !dn->inode_page_locked)
533 unlock_page(dn->inode_page);
534 return 0;
535}
536
537static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
538 struct page *page)
539{
540 struct dnode_of_data dn;
541 struct node_info ni;
542 unsigned int start, end;
543 int err = 0, recovered = 0;
544
545 /* step 1: recover xattr */
546 if (IS_INODE(page)) {
547 err = f2fs_recover_inline_xattr(inode, page);
548 if (err)
549 goto out;
550 } else if (f2fs_has_xattr_block(ofs_of_node(page))) {
551 err = f2fs_recover_xattr_data(inode, page);
552 if (!err)
553 recovered++;
554 goto out;
555 }
556
557 /* step 2: recover inline data */
558 err = f2fs_recover_inline_data(inode, page);
559 if (err) {
560 if (err == 1)
561 err = 0;
562 goto out;
563 }
564
565 /* step 3: recover data indices */
566 start = f2fs_start_bidx_of_node(ofs_of_node(page), inode);
567 end = start + ADDRS_PER_PAGE(page, inode);
568
569 set_new_dnode(&dn, inode, NULL, NULL, 0);
570retry_dn:
571 err = f2fs_get_dnode_of_data(&dn, start, ALLOC_NODE);
572 if (err) {
573 if (err == -ENOMEM) {
574 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
575 goto retry_dn;
576 }
577 goto out;
578 }
579
580 f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true);
581
582 err = f2fs_get_node_info(sbi, dn.nid, &ni);
583 if (err)
584 goto err;
585
586 f2fs_bug_on(sbi, ni.ino != ino_of_node(page));
587
588 if (ofs_of_node(dn.node_page) != ofs_of_node(page)) {
589 f2fs_warn(sbi, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u",
590 inode->i_ino, ofs_of_node(dn.node_page),
591 ofs_of_node(page));
592 err = -EFSCORRUPTED;
593 goto err;
594 }
595
596 for (; start < end; start++, dn.ofs_in_node++) {
597 block_t src, dest;
598
599 src = f2fs_data_blkaddr(&dn);
600 dest = data_blkaddr(dn.inode, page, dn.ofs_in_node);
601
602 if (__is_valid_data_blkaddr(src) &&
603 !f2fs_is_valid_blkaddr(sbi, src, META_POR)) {
604 err = -EFSCORRUPTED;
605 goto err;
606 }
607
608 if (__is_valid_data_blkaddr(dest) &&
609 !f2fs_is_valid_blkaddr(sbi, dest, META_POR)) {
610 err = -EFSCORRUPTED;
611 goto err;
612 }
613
614 /* skip recovering if dest is the same as src */
615 if (src == dest)
616 continue;
617
618 /* dest is invalid, just invalidate src block */
619 if (dest == NULL_ADDR) {
620 f2fs_truncate_data_blocks_range(&dn, 1);
621 continue;
622 }
623
624 if (!file_keep_isize(inode) &&
625 (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT)))
626 f2fs_i_size_write(inode,
627 (loff_t)(start + 1) << PAGE_SHIFT);
628
629 /*
630 * dest is reserved block, invalidate src block
631 * and then reserve one new block in dnode page.
632 */
633 if (dest == NEW_ADDR) {
634 f2fs_truncate_data_blocks_range(&dn, 1);
635 f2fs_reserve_new_block(&dn);
636 continue;
637 }
638
639 /* dest is valid block, try to recover from src to dest */
640 if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) {
641
642 if (src == NULL_ADDR) {
643 err = f2fs_reserve_new_block(&dn);
644 while (err &&
645 IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION))
646 err = f2fs_reserve_new_block(&dn);
647 /* We should not get -ENOSPC */
648 f2fs_bug_on(sbi, err);
649 if (err)
650 goto err;
651 }
652retry_prev:
653 /* Check the previous node page having this index */
654 err = check_index_in_prev_nodes(sbi, dest, &dn);
655 if (err) {
656 if (err == -ENOMEM) {
657 congestion_wait(BLK_RW_ASYNC,
658 DEFAULT_IO_TIMEOUT);
659 goto retry_prev;
660 }
661 goto err;
662 }
663
664 /* write dummy data page */
665 f2fs_replace_block(sbi, &dn, src, dest,
666 ni.version, false, false);
667 recovered++;
668 }
669 }
670
671 copy_node_footer(dn.node_page, page);
672 fill_node_footer(dn.node_page, dn.nid, ni.ino,
673 ofs_of_node(page), false);
674 set_page_dirty(dn.node_page);
675err:
676 f2fs_put_dnode(&dn);
677out:
678 f2fs_notice(sbi, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d",
679 inode->i_ino, file_keep_isize(inode) ? "keep" : "recover",
680 recovered, err);
681 return err;
682}
683
684static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list,
685 struct list_head *tmp_inode_list, struct list_head *dir_list)
686{
687 struct curseg_info *curseg;
688 struct page *page = NULL;
689 int err = 0;
690 block_t blkaddr;
691
692 /* get node pages in the current segment */
693 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
694 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
695
696 while (1) {
697 struct fsync_inode_entry *entry;
698
699 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR))
700 break;
701
702 f2fs_ra_meta_pages_cond(sbi, blkaddr);
703
704 page = f2fs_get_tmp_page(sbi, blkaddr);
705 if (IS_ERR(page)) {
706 err = PTR_ERR(page);
707 break;
708 }
709
710 if (!is_recoverable_dnode(page)) {
711 f2fs_put_page(page, 1);
712 break;
713 }
714
715 entry = get_fsync_inode(inode_list, ino_of_node(page));
716 if (!entry)
717 goto next;
718 /*
719 * inode(x) | CP | inode(x) | dnode(F)
720 * In this case, we can lose the latest inode(x).
721 * So, call recover_inode for the inode update.
722 */
723 if (IS_INODE(page)) {
724 err = recover_inode(entry->inode, page);
725 if (err) {
726 f2fs_put_page(page, 1);
727 break;
728 }
729 }
730 if (entry->last_dentry == blkaddr) {
731 err = recover_dentry(entry->inode, page, dir_list);
732 if (err) {
733 f2fs_put_page(page, 1);
734 break;
735 }
736 }
737 err = do_recover_data(sbi, entry->inode, page);
738 if (err) {
739 f2fs_put_page(page, 1);
740 break;
741 }
742
743 if (entry->blkaddr == blkaddr)
744 list_move_tail(&entry->list, tmp_inode_list);
745next:
746 /* check next segment */
747 blkaddr = next_blkaddr_of_node(page);
748 f2fs_put_page(page, 1);
749 }
750 if (!err)
751 f2fs_allocate_new_segments(sbi);
752 return err;
753}
754
755int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
756{
757 struct list_head inode_list, tmp_inode_list;
758 struct list_head dir_list;
759 int err;
760 int ret = 0;
761 unsigned long s_flags = sbi->sb->s_flags;
762 bool need_writecp = false;
763 bool fix_curseg_write_pointer = false;
764#ifdef CONFIG_QUOTA
765 int quota_enabled;
766#endif
767
768 if (s_flags & SB_RDONLY) {
769 f2fs_info(sbi, "recover fsync data on readonly fs");
770 sbi->sb->s_flags &= ~SB_RDONLY;
771 }
772
773#ifdef CONFIG_QUOTA
774 /* Needed for iput() to work correctly and not trash data */
775 sbi->sb->s_flags |= SB_ACTIVE;
776 /* Turn on quotas so that they are updated correctly */
777 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
778#endif
779
780 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
781 sizeof(struct fsync_inode_entry));
782 if (!fsync_entry_slab) {
783 err = -ENOMEM;
784 goto out;
785 }
786
787 INIT_LIST_HEAD(&inode_list);
788 INIT_LIST_HEAD(&tmp_inode_list);
789 INIT_LIST_HEAD(&dir_list);
790
791 /* prevent checkpoint */
792 mutex_lock(&sbi->cp_mutex);
793
794 /* step #1: find fsynced inode numbers */
795 err = find_fsync_dnodes(sbi, &inode_list, check_only);
796 if (err || list_empty(&inode_list))
797 goto skip;
798
799 if (check_only) {
800 ret = 1;
801 goto skip;
802 }
803
804 need_writecp = true;
805
806 /* step #2: recover data */
807 err = recover_data(sbi, &inode_list, &tmp_inode_list, &dir_list);
808 if (!err)
809 f2fs_bug_on(sbi, !list_empty(&inode_list));
810 else {
811 /* restore s_flags to let iput() trash data */
812 sbi->sb->s_flags = s_flags;
813 }
814skip:
815 fix_curseg_write_pointer = !check_only || list_empty(&inode_list);
816
817 destroy_fsync_dnodes(&inode_list, err);
818 destroy_fsync_dnodes(&tmp_inode_list, err);
819
820 /* truncate meta pages to be used by the recovery */
821 truncate_inode_pages_range(META_MAPPING(sbi),
822 (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1);
823
824 if (err) {
825 truncate_inode_pages_final(NODE_MAPPING(sbi));
826 truncate_inode_pages_final(META_MAPPING(sbi));
827 }
828
829 /*
830 * If fsync data succeeds or there is no fsync data to recover,
831 * and the f2fs is not read only, check and fix zoned block devices'
832 * write pointer consistency.
833 */
834 if (!err && fix_curseg_write_pointer && !f2fs_readonly(sbi->sb) &&
835 f2fs_sb_has_blkzoned(sbi)) {
836 err = f2fs_fix_curseg_write_pointer(sbi);
837 ret = err;
838 }
839
840 if (!err)
841 clear_sbi_flag(sbi, SBI_POR_DOING);
842
843 mutex_unlock(&sbi->cp_mutex);
844
845 /* let's drop all the directory inodes for clean checkpoint */
846 destroy_fsync_dnodes(&dir_list, err);
847
848 if (need_writecp) {
849 set_sbi_flag(sbi, SBI_IS_RECOVERED);
850
851 if (!err) {
852 struct cp_control cpc = {
853 .reason = CP_RECOVERY,
854 };
855 err = f2fs_write_checkpoint(sbi, &cpc);
856 }
857 }
858
859 kmem_cache_destroy(fsync_entry_slab);
860out:
861#ifdef CONFIG_QUOTA
862 /* Turn quotas off */
863 if (quota_enabled)
864 f2fs_quota_off_umount(sbi->sb);
865#endif
866 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
867
868 return ret ? ret: err;
869}
1/*
2 * fs/f2fs/recovery.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/fs.h>
12#include <linux/f2fs_fs.h>
13#include "f2fs.h"
14#include "node.h"
15#include "segment.h"
16
17/*
18 * Roll forward recovery scenarios.
19 *
20 * [Term] F: fsync_mark, D: dentry_mark
21 *
22 * 1. inode(x) | CP | inode(x) | dnode(F)
23 * -> Update the latest inode(x).
24 *
25 * 2. inode(x) | CP | inode(F) | dnode(F)
26 * -> No problem.
27 *
28 * 3. inode(x) | CP | dnode(F) | inode(x)
29 * -> Recover to the latest dnode(F), and drop the last inode(x)
30 *
31 * 4. inode(x) | CP | dnode(F) | inode(F)
32 * -> No problem.
33 *
34 * 5. CP | inode(x) | dnode(F)
35 * -> The inode(DF) was missing. Should drop this dnode(F).
36 *
37 * 6. CP | inode(DF) | dnode(F)
38 * -> No problem.
39 *
40 * 7. CP | dnode(F) | inode(DF)
41 * -> If f2fs_iget fails, then goto next to find inode(DF).
42 *
43 * 8. CP | dnode(F) | inode(x)
44 * -> If f2fs_iget fails, then goto next to find inode(DF).
45 * But it will fail due to no inode(DF).
46 */
47
48static struct kmem_cache *fsync_entry_slab;
49
50bool space_for_roll_forward(struct f2fs_sb_info *sbi)
51{
52 s64 nalloc = percpu_counter_sum_positive(&sbi->alloc_valid_block_count);
53
54 if (sbi->last_valid_block_count + nalloc > sbi->user_block_count)
55 return false;
56 return true;
57}
58
59static struct fsync_inode_entry *get_fsync_inode(struct list_head *head,
60 nid_t ino)
61{
62 struct fsync_inode_entry *entry;
63
64 list_for_each_entry(entry, head, list)
65 if (entry->inode->i_ino == ino)
66 return entry;
67
68 return NULL;
69}
70
71static struct fsync_inode_entry *add_fsync_inode(struct f2fs_sb_info *sbi,
72 struct list_head *head, nid_t ino, bool quota_inode)
73{
74 struct inode *inode;
75 struct fsync_inode_entry *entry;
76 int err;
77
78 inode = f2fs_iget_retry(sbi->sb, ino);
79 if (IS_ERR(inode))
80 return ERR_CAST(inode);
81
82 err = dquot_initialize(inode);
83 if (err)
84 goto err_out;
85
86 if (quota_inode) {
87 err = dquot_alloc_inode(inode);
88 if (err)
89 goto err_out;
90 }
91
92 entry = f2fs_kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO);
93 entry->inode = inode;
94 list_add_tail(&entry->list, head);
95
96 return entry;
97err_out:
98 iput(inode);
99 return ERR_PTR(err);
100}
101
102static void del_fsync_inode(struct fsync_inode_entry *entry)
103{
104 iput(entry->inode);
105 list_del(&entry->list);
106 kmem_cache_free(fsync_entry_slab, entry);
107}
108
109static int recover_dentry(struct inode *inode, struct page *ipage,
110 struct list_head *dir_list)
111{
112 struct f2fs_inode *raw_inode = F2FS_INODE(ipage);
113 nid_t pino = le32_to_cpu(raw_inode->i_pino);
114 struct f2fs_dir_entry *de;
115 struct fscrypt_name fname;
116 struct page *page;
117 struct inode *dir, *einode;
118 struct fsync_inode_entry *entry;
119 int err = 0;
120 char *name;
121
122 entry = get_fsync_inode(dir_list, pino);
123 if (!entry) {
124 entry = add_fsync_inode(F2FS_I_SB(inode), dir_list,
125 pino, false);
126 if (IS_ERR(entry)) {
127 dir = ERR_CAST(entry);
128 err = PTR_ERR(entry);
129 goto out;
130 }
131 }
132
133 dir = entry->inode;
134
135 memset(&fname, 0, sizeof(struct fscrypt_name));
136 fname.disk_name.len = le32_to_cpu(raw_inode->i_namelen);
137 fname.disk_name.name = raw_inode->i_name;
138
139 if (unlikely(fname.disk_name.len > F2FS_NAME_LEN)) {
140 WARN_ON(1);
141 err = -ENAMETOOLONG;
142 goto out;
143 }
144retry:
145 de = __f2fs_find_entry(dir, &fname, &page);
146 if (de && inode->i_ino == le32_to_cpu(de->ino))
147 goto out_put;
148
149 if (de) {
150 einode = f2fs_iget_retry(inode->i_sb, le32_to_cpu(de->ino));
151 if (IS_ERR(einode)) {
152 WARN_ON(1);
153 err = PTR_ERR(einode);
154 if (err == -ENOENT)
155 err = -EEXIST;
156 goto out_put;
157 }
158
159 err = dquot_initialize(einode);
160 if (err) {
161 iput(einode);
162 goto out_put;
163 }
164
165 err = acquire_orphan_inode(F2FS_I_SB(inode));
166 if (err) {
167 iput(einode);
168 goto out_put;
169 }
170 f2fs_delete_entry(de, page, dir, einode);
171 iput(einode);
172 goto retry;
173 } else if (IS_ERR(page)) {
174 err = PTR_ERR(page);
175 } else {
176 err = __f2fs_do_add_link(dir, &fname, inode,
177 inode->i_ino, inode->i_mode);
178 }
179 if (err == -ENOMEM)
180 goto retry;
181 goto out;
182
183out_put:
184 f2fs_put_page(page, 0);
185out:
186 if (file_enc_name(inode))
187 name = "<encrypted>";
188 else
189 name = raw_inode->i_name;
190 f2fs_msg(inode->i_sb, KERN_NOTICE,
191 "%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
197static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri)
198{
199 if (ri->i_inline & F2FS_PIN_FILE)
200 set_inode_flag(inode, FI_PIN_FILE);
201 else
202 clear_inode_flag(inode, FI_PIN_FILE);
203 if (ri->i_inline & F2FS_DATA_EXIST)
204 set_inode_flag(inode, FI_DATA_EXIST);
205 else
206 clear_inode_flag(inode, FI_DATA_EXIST);
207 if (!(ri->i_inline & F2FS_INLINE_DOTS))
208 clear_inode_flag(inode, FI_INLINE_DOTS);
209}
210
211static void recover_inode(struct inode *inode, struct page *page)
212{
213 struct f2fs_inode *raw = F2FS_INODE(page);
214 char *name;
215
216 inode->i_mode = le16_to_cpu(raw->i_mode);
217 f2fs_i_size_write(inode, le64_to_cpu(raw->i_size));
218 inode->i_atime.tv_sec = le64_to_cpu(raw->i_atime);
219 inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime);
220 inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime);
221 inode->i_atime.tv_nsec = le32_to_cpu(raw->i_atime_nsec);
222 inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec);
223 inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec);
224
225 F2FS_I(inode)->i_advise = raw->i_advise;
226
227 recover_inline_flags(inode, raw);
228
229 if (file_enc_name(inode))
230 name = "<encrypted>";
231 else
232 name = F2FS_INODE(page)->i_name;
233
234 f2fs_msg(inode->i_sb, KERN_NOTICE,
235 "recover_inode: ino = %x, name = %s, inline = %x",
236 ino_of_node(page), name, raw->i_inline);
237}
238
239static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
240 bool check_only)
241{
242 struct curseg_info *curseg;
243 struct page *page = NULL;
244 block_t blkaddr;
245 unsigned int loop_cnt = 0;
246 unsigned int free_blocks = sbi->user_block_count -
247 valid_user_blocks(sbi);
248 int err = 0;
249
250 /* get node pages in the current segment */
251 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
252 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
253
254 while (1) {
255 struct fsync_inode_entry *entry;
256
257 if (!is_valid_blkaddr(sbi, blkaddr, META_POR))
258 return 0;
259
260 page = get_tmp_page(sbi, blkaddr);
261
262 if (!is_recoverable_dnode(page))
263 break;
264
265 if (!is_fsync_dnode(page))
266 goto next;
267
268 entry = get_fsync_inode(head, ino_of_node(page));
269 if (!entry) {
270 bool quota_inode = false;
271
272 if (!check_only &&
273 IS_INODE(page) && is_dent_dnode(page)) {
274 err = recover_inode_page(sbi, page);
275 if (err)
276 break;
277 quota_inode = true;
278 }
279
280 /*
281 * CP | dnode(F) | inode(DF)
282 * For this case, we should not give up now.
283 */
284 entry = add_fsync_inode(sbi, head, ino_of_node(page),
285 quota_inode);
286 if (IS_ERR(entry)) {
287 err = PTR_ERR(entry);
288 if (err == -ENOENT) {
289 err = 0;
290 goto next;
291 }
292 break;
293 }
294 }
295 entry->blkaddr = blkaddr;
296
297 if (IS_INODE(page) && is_dent_dnode(page))
298 entry->last_dentry = blkaddr;
299next:
300 /* sanity check in order to detect looped node chain */
301 if (++loop_cnt >= free_blocks ||
302 blkaddr == next_blkaddr_of_node(page)) {
303 f2fs_msg(sbi->sb, KERN_NOTICE,
304 "%s: detect looped node chain, "
305 "blkaddr:%u, next:%u",
306 __func__, blkaddr, next_blkaddr_of_node(page));
307 err = -EINVAL;
308 break;
309 }
310
311 /* check next segment */
312 blkaddr = next_blkaddr_of_node(page);
313 f2fs_put_page(page, 1);
314
315 ra_meta_pages_cond(sbi, blkaddr);
316 }
317 f2fs_put_page(page, 1);
318 return err;
319}
320
321static void destroy_fsync_dnodes(struct list_head *head)
322{
323 struct fsync_inode_entry *entry, *tmp;
324
325 list_for_each_entry_safe(entry, tmp, head, list)
326 del_fsync_inode(entry);
327}
328
329static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
330 block_t blkaddr, struct dnode_of_data *dn)
331{
332 struct seg_entry *sentry;
333 unsigned int segno = GET_SEGNO(sbi, blkaddr);
334 unsigned short blkoff = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
335 struct f2fs_summary_block *sum_node;
336 struct f2fs_summary sum;
337 struct page *sum_page, *node_page;
338 struct dnode_of_data tdn = *dn;
339 nid_t ino, nid;
340 struct inode *inode;
341 unsigned int offset;
342 block_t bidx;
343 int i;
344
345 sentry = get_seg_entry(sbi, segno);
346 if (!f2fs_test_bit(blkoff, sentry->cur_valid_map))
347 return 0;
348
349 /* Get the previous summary */
350 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
351 struct curseg_info *curseg = CURSEG_I(sbi, i);
352 if (curseg->segno == segno) {
353 sum = curseg->sum_blk->entries[blkoff];
354 goto got_it;
355 }
356 }
357
358 sum_page = get_sum_page(sbi, segno);
359 sum_node = (struct f2fs_summary_block *)page_address(sum_page);
360 sum = sum_node->entries[blkoff];
361 f2fs_put_page(sum_page, 1);
362got_it:
363 /* Use the locked dnode page and inode */
364 nid = le32_to_cpu(sum.nid);
365 if (dn->inode->i_ino == nid) {
366 tdn.nid = nid;
367 if (!dn->inode_page_locked)
368 lock_page(dn->inode_page);
369 tdn.node_page = dn->inode_page;
370 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
371 goto truncate_out;
372 } else if (dn->nid == nid) {
373 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
374 goto truncate_out;
375 }
376
377 /* Get the node page */
378 node_page = get_node_page(sbi, nid);
379 if (IS_ERR(node_page))
380 return PTR_ERR(node_page);
381
382 offset = ofs_of_node(node_page);
383 ino = ino_of_node(node_page);
384 f2fs_put_page(node_page, 1);
385
386 if (ino != dn->inode->i_ino) {
387 int ret;
388
389 /* Deallocate previous index in the node page */
390 inode = f2fs_iget_retry(sbi->sb, ino);
391 if (IS_ERR(inode))
392 return PTR_ERR(inode);
393
394 ret = dquot_initialize(inode);
395 if (ret) {
396 iput(inode);
397 return ret;
398 }
399 } else {
400 inode = dn->inode;
401 }
402
403 bidx = start_bidx_of_node(offset, inode) + le16_to_cpu(sum.ofs_in_node);
404
405 /*
406 * if inode page is locked, unlock temporarily, but its reference
407 * count keeps alive.
408 */
409 if (ino == dn->inode->i_ino && dn->inode_page_locked)
410 unlock_page(dn->inode_page);
411
412 set_new_dnode(&tdn, inode, NULL, NULL, 0);
413 if (get_dnode_of_data(&tdn, bidx, LOOKUP_NODE))
414 goto out;
415
416 if (tdn.data_blkaddr == blkaddr)
417 truncate_data_blocks_range(&tdn, 1);
418
419 f2fs_put_dnode(&tdn);
420out:
421 if (ino != dn->inode->i_ino)
422 iput(inode);
423 else if (dn->inode_page_locked)
424 lock_page(dn->inode_page);
425 return 0;
426
427truncate_out:
428 if (datablock_addr(tdn.inode, tdn.node_page,
429 tdn.ofs_in_node) == blkaddr)
430 truncate_data_blocks_range(&tdn, 1);
431 if (dn->inode->i_ino == nid && !dn->inode_page_locked)
432 unlock_page(dn->inode_page);
433 return 0;
434}
435
436static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
437 struct page *page)
438{
439 struct dnode_of_data dn;
440 struct node_info ni;
441 unsigned int start, end;
442 int err = 0, recovered = 0;
443
444 /* step 1: recover xattr */
445 if (IS_INODE(page)) {
446 recover_inline_xattr(inode, page);
447 } else if (f2fs_has_xattr_block(ofs_of_node(page))) {
448 err = recover_xattr_data(inode, page);
449 if (!err)
450 recovered++;
451 goto out;
452 }
453
454 /* step 2: recover inline data */
455 if (recover_inline_data(inode, page))
456 goto out;
457
458 /* step 3: recover data indices */
459 start = start_bidx_of_node(ofs_of_node(page), inode);
460 end = start + ADDRS_PER_PAGE(page, inode);
461
462 set_new_dnode(&dn, inode, NULL, NULL, 0);
463retry_dn:
464 err = get_dnode_of_data(&dn, start, ALLOC_NODE);
465 if (err) {
466 if (err == -ENOMEM) {
467 congestion_wait(BLK_RW_ASYNC, HZ/50);
468 goto retry_dn;
469 }
470 goto out;
471 }
472
473 f2fs_wait_on_page_writeback(dn.node_page, NODE, true);
474
475 get_node_info(sbi, dn.nid, &ni);
476 f2fs_bug_on(sbi, ni.ino != ino_of_node(page));
477 f2fs_bug_on(sbi, ofs_of_node(dn.node_page) != ofs_of_node(page));
478
479 for (; start < end; start++, dn.ofs_in_node++) {
480 block_t src, dest;
481
482 src = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
483 dest = datablock_addr(dn.inode, page, dn.ofs_in_node);
484
485 /* skip recovering if dest is the same as src */
486 if (src == dest)
487 continue;
488
489 /* dest is invalid, just invalidate src block */
490 if (dest == NULL_ADDR) {
491 truncate_data_blocks_range(&dn, 1);
492 continue;
493 }
494
495 if (!file_keep_isize(inode) &&
496 (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT)))
497 f2fs_i_size_write(inode,
498 (loff_t)(start + 1) << PAGE_SHIFT);
499
500 /*
501 * dest is reserved block, invalidate src block
502 * and then reserve one new block in dnode page.
503 */
504 if (dest == NEW_ADDR) {
505 truncate_data_blocks_range(&dn, 1);
506 reserve_new_block(&dn);
507 continue;
508 }
509
510 /* dest is valid block, try to recover from src to dest */
511 if (is_valid_blkaddr(sbi, dest, META_POR)) {
512
513 if (src == NULL_ADDR) {
514 err = reserve_new_block(&dn);
515#ifdef CONFIG_F2FS_FAULT_INJECTION
516 while (err)
517 err = reserve_new_block(&dn);
518#endif
519 /* We should not get -ENOSPC */
520 f2fs_bug_on(sbi, err);
521 if (err)
522 goto err;
523 }
524retry_prev:
525 /* Check the previous node page having this index */
526 err = check_index_in_prev_nodes(sbi, dest, &dn);
527 if (err) {
528 if (err == -ENOMEM) {
529 congestion_wait(BLK_RW_ASYNC, HZ/50);
530 goto retry_prev;
531 }
532 goto err;
533 }
534
535 /* write dummy data page */
536 f2fs_replace_block(sbi, &dn, src, dest,
537 ni.version, false, false);
538 recovered++;
539 }
540 }
541
542 copy_node_footer(dn.node_page, page);
543 fill_node_footer(dn.node_page, dn.nid, ni.ino,
544 ofs_of_node(page), false);
545 set_page_dirty(dn.node_page);
546err:
547 f2fs_put_dnode(&dn);
548out:
549 f2fs_msg(sbi->sb, KERN_NOTICE,
550 "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d",
551 inode->i_ino,
552 file_keep_isize(inode) ? "keep" : "recover",
553 recovered, err);
554 return err;
555}
556
557static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list,
558 struct list_head *dir_list)
559{
560 struct curseg_info *curseg;
561 struct page *page = NULL;
562 int err = 0;
563 block_t blkaddr;
564
565 /* get node pages in the current segment */
566 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
567 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
568
569 while (1) {
570 struct fsync_inode_entry *entry;
571
572 if (!is_valid_blkaddr(sbi, blkaddr, META_POR))
573 break;
574
575 ra_meta_pages_cond(sbi, blkaddr);
576
577 page = get_tmp_page(sbi, blkaddr);
578
579 if (!is_recoverable_dnode(page)) {
580 f2fs_put_page(page, 1);
581 break;
582 }
583
584 entry = get_fsync_inode(inode_list, ino_of_node(page));
585 if (!entry)
586 goto next;
587 /*
588 * inode(x) | CP | inode(x) | dnode(F)
589 * In this case, we can lose the latest inode(x).
590 * So, call recover_inode for the inode update.
591 */
592 if (IS_INODE(page))
593 recover_inode(entry->inode, page);
594 if (entry->last_dentry == blkaddr) {
595 err = recover_dentry(entry->inode, page, dir_list);
596 if (err) {
597 f2fs_put_page(page, 1);
598 break;
599 }
600 }
601 err = do_recover_data(sbi, entry->inode, page);
602 if (err) {
603 f2fs_put_page(page, 1);
604 break;
605 }
606
607 if (entry->blkaddr == blkaddr)
608 del_fsync_inode(entry);
609next:
610 /* check next segment */
611 blkaddr = next_blkaddr_of_node(page);
612 f2fs_put_page(page, 1);
613 }
614 if (!err)
615 allocate_new_segments(sbi);
616 return err;
617}
618
619int recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
620{
621 struct list_head inode_list;
622 struct list_head dir_list;
623 int err;
624 int ret = 0;
625 unsigned long s_flags = sbi->sb->s_flags;
626 bool need_writecp = false;
627#ifdef CONFIG_QUOTA
628 int quota_enabled;
629#endif
630
631 if (s_flags & SB_RDONLY) {
632 f2fs_msg(sbi->sb, KERN_INFO, "orphan cleanup on readonly fs");
633 sbi->sb->s_flags &= ~SB_RDONLY;
634 }
635
636#ifdef CONFIG_QUOTA
637 /* Needed for iput() to work correctly and not trash data */
638 sbi->sb->s_flags |= SB_ACTIVE;
639 /* Turn on quotas so that they are updated correctly */
640 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
641#endif
642
643 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
644 sizeof(struct fsync_inode_entry));
645 if (!fsync_entry_slab) {
646 err = -ENOMEM;
647 goto out;
648 }
649
650 INIT_LIST_HEAD(&inode_list);
651 INIT_LIST_HEAD(&dir_list);
652
653 /* prevent checkpoint */
654 mutex_lock(&sbi->cp_mutex);
655
656 /* step #1: find fsynced inode numbers */
657 err = find_fsync_dnodes(sbi, &inode_list, check_only);
658 if (err || list_empty(&inode_list))
659 goto skip;
660
661 if (check_only) {
662 ret = 1;
663 goto skip;
664 }
665
666 need_writecp = true;
667
668 /* step #2: recover data */
669 err = recover_data(sbi, &inode_list, &dir_list);
670 if (!err)
671 f2fs_bug_on(sbi, !list_empty(&inode_list));
672skip:
673 destroy_fsync_dnodes(&inode_list);
674
675 /* truncate meta pages to be used by the recovery */
676 truncate_inode_pages_range(META_MAPPING(sbi),
677 (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1);
678
679 if (err) {
680 truncate_inode_pages_final(NODE_MAPPING(sbi));
681 truncate_inode_pages_final(META_MAPPING(sbi));
682 }
683
684 clear_sbi_flag(sbi, SBI_POR_DOING);
685 mutex_unlock(&sbi->cp_mutex);
686
687 /* let's drop all the directory inodes for clean checkpoint */
688 destroy_fsync_dnodes(&dir_list);
689
690 if (!err && need_writecp) {
691 struct cp_control cpc = {
692 .reason = CP_RECOVERY,
693 };
694 err = write_checkpoint(sbi, &cpc);
695 }
696
697 kmem_cache_destroy(fsync_entry_slab);
698out:
699#ifdef CONFIG_QUOTA
700 /* Turn quotas off */
701 if (quota_enabled)
702 f2fs_quota_off_umount(sbi->sb);
703#endif
704 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
705
706 return ret ? ret: err;
707}