fs/f2fs/recovery.c

   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
  48 static struct kmem_cache *fsync_entry_slab;
  49
  50 bool 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
  59 static 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
  71 static struct fsync_inode_entry *add_fsync_inode(struct list_head *head,
  72                                                         struct inode *inode)
  73 {
  74         struct fsync_inode_entry *entry;
  75
  76         entry = kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO);
  77         if (!entry)
  78                 return NULL;
  79
  80         entry->inode = inode;
  81         list_add_tail(&entry->list, head);
  82
  83         return entry;
  84 }
  85
  86 static void del_fsync_inode(struct fsync_inode_entry *entry)
  87 {
  88         iput(entry->inode);
  89         list_del(&entry->list);
  90         kmem_cache_free(fsync_entry_slab, entry);
  91 }
  92
  93 static int recover_dentry(struct inode *inode, struct page *ipage,
  94                                                 struct list_head *dir_list)
  95 {
  96         struct f2fs_inode *raw_inode = F2FS_INODE(ipage);
  97         nid_t pino = le32_to_cpu(raw_inode->i_pino);
  98         struct f2fs_dir_entry *de;
  99         struct fscrypt_name fname;
 100         struct page *page;
 101         struct inode *dir, *einode;
 102         struct fsync_inode_entry *entry;
 103         int err = 0;
 104         char *name;
 105
 106         entry = get_fsync_inode(dir_list, pino);
 107         if (!entry) {
 108                 dir = f2fs_iget(inode->i_sb, pino);
 109                 if (IS_ERR(dir)) {
 110                         err = PTR_ERR(dir);
 111                         goto out;
 112                 }
 113
 114                 entry = add_fsync_inode(dir_list, dir);
 115                 if (!entry) {
 116                         err = -ENOMEM;
 117                         iput(dir);
 118                         goto out;
 119                 }
 120         }
 121
 122         dir = entry->inode;
 123
 124         memset(&fname, 0, sizeof(struct fscrypt_name));
 125         fname.disk_name.len = le32_to_cpu(raw_inode->i_namelen);
 126         fname.disk_name.name = raw_inode->i_name;
 127
 128         if (unlikely(fname.disk_name.len > F2FS_NAME_LEN)) {
 129                 WARN_ON(1);
 130                 err = -ENAMETOOLONG;
 131                 goto out;
 132         }
 133 retry:
 134         de = __f2fs_find_entry(dir, &fname, &page);
 135         if (de && inode->i_ino == le32_to_cpu(de->ino))
 136                 goto out_unmap_put;
 137
 138         if (de) {
 139                 einode = f2fs_iget(inode->i_sb, le32_to_cpu(de->ino));
 140                 if (IS_ERR(einode)) {
 141                         WARN_ON(1);
 142                         err = PTR_ERR(einode);
 143                         if (err == -ENOENT)
 144                                 err = -EEXIST;
 145                         goto out_unmap_put;
 146                 }
 147                 err = acquire_orphan_inode(F2FS_I_SB(inode));
 148                 if (err) {
 149                         iput(einode);
 150                         goto out_unmap_put;
 151                 }
 152                 f2fs_delete_entry(de, page, dir, einode);
 153                 iput(einode);
 154                 goto retry;
 155         } else if (IS_ERR(page)) {
 156                 err = PTR_ERR(page);
 157         } else {
 158                 err = __f2fs_do_add_link(dir, &fname, inode,
 159                                         inode->i_ino, inode->i_mode);
 160         }
 161         goto out;
 162
 163 out_unmap_put:
 164         f2fs_dentry_kunmap(dir, page);
 165         f2fs_put_page(page, 0);
 166 out:
 167         if (file_enc_name(inode))
 168                 name = "<encrypted>";
 169         else
 170                 name = raw_inode->i_name;
 171         f2fs_msg(inode->i_sb, KERN_NOTICE,
 172                         "%s: ino = %x, name = %s, dir = %lx, err = %d",
 173                         __func__, ino_of_node(ipage), name,
 174                         IS_ERR(dir) ? 0 : dir->i_ino, err);
 175         return err;
 176 }
 177
 178 static void recover_inode(struct inode *inode, struct page *page)
 179 {
 180         struct f2fs_inode *raw = F2FS_INODE(page);
 181         char *name;
 182
 183         inode->i_mode = le16_to_cpu(raw->i_mode);
 184         f2fs_i_size_write(inode, le64_to_cpu(raw->i_size));
 185         inode->i_atime.tv_sec = le64_to_cpu(raw->i_mtime);
 186         inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime);
 187         inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime);
 188         inode->i_atime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec);
 189         inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec);
 190         inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec);
 191
 192         if (file_enc_name(inode))
 193                 name = "<encrypted>";
 194         else
 195                 name = F2FS_INODE(page)->i_name;
 196
 197         f2fs_msg(inode->i_sb, KERN_NOTICE, "recover_inode: ino = %x, name = %s",
 198                         ino_of_node(page), name);
 199 }
 200
 201 static bool is_same_inode(struct inode *inode, struct page *ipage)
 202 {
 203         struct f2fs_inode *ri = F2FS_INODE(ipage);
 204         struct timespec disk;
 205
 206         if (!IS_INODE(ipage))
 207                 return true;
 208
 209         disk.tv_sec = le64_to_cpu(ri->i_ctime);
 210         disk.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
 211         if (timespec_compare(&inode->i_ctime, &disk) > 0)
 212                 return false;
 213
 214         disk.tv_sec = le64_to_cpu(ri->i_atime);
 215         disk.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
 216         if (timespec_compare(&inode->i_atime, &disk) > 0)
 217                 return false;
 218
 219         disk.tv_sec = le64_to_cpu(ri->i_mtime);
 220         disk.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
 221         if (timespec_compare(&inode->i_mtime, &disk) > 0)
 222                 return false;
 223
 224         return true;
 225 }
 226
 227 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
 228 {
 229         unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
 230         struct curseg_info *curseg;
 231         struct inode *inode;
 232         struct page *page = NULL;
 233         block_t blkaddr;
 234         int err = 0;
 235
 236         /* get node pages in the current segment */
 237         curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
 238         blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
 239
 240         while (1) {
 241                 struct fsync_inode_entry *entry;
 242
 243                 if (!is_valid_blkaddr(sbi, blkaddr, META_POR))
 244                         return 0;
 245
 246                 page = get_tmp_page(sbi, blkaddr);
 247
 248                 if (cp_ver != cpver_of_node(page))
 249                         break;
 250
 251                 if (!is_fsync_dnode(page))
 252                         goto next;
 253
 254                 entry = get_fsync_inode(head, ino_of_node(page));
 255                 if (entry) {
 256                         if (!is_same_inode(entry->inode, page))
 257                                 goto next;
 258                 } else {
 259                         if (IS_INODE(page) && is_dent_dnode(page)) {
 260                                 err = recover_inode_page(sbi, page);
 261                                 if (err)
 262                                         break;
 263                         }
 264
 265                         /*
 266                          * CP | dnode(F) | inode(DF)
 267                          * For this case, we should not give up now.
 268                          */
 269                         inode = f2fs_iget(sbi->sb, ino_of_node(page));
 270                         if (IS_ERR(inode)) {
 271                                 err = PTR_ERR(inode);
 272                                 if (err == -ENOENT) {
 273                                         err = 0;
 274                                         goto next;
 275                                 }
 276                                 break;
 277                         }
 278
 279                         /* add this fsync inode to the list */
 280                         entry = add_fsync_inode(head, inode);
 281                         if (!entry) {
 282                                 err = -ENOMEM;
 283                                 iput(inode);
 284                                 break;
 285                         }
 286                 }
 287                 entry->blkaddr = blkaddr;
 288
 289                 if (IS_INODE(page) && is_dent_dnode(page))
 290                         entry->last_dentry = blkaddr;
 291 next:
 292                 /* check next segment */
 293                 blkaddr = next_blkaddr_of_node(page);
 294                 f2fs_put_page(page, 1);
 295
 296                 ra_meta_pages_cond(sbi, blkaddr);
 297         }
 298         f2fs_put_page(page, 1);
 299         return err;
 300 }
 301
 302 static void destroy_fsync_dnodes(struct list_head *head)
 303 {
 304         struct fsync_inode_entry *entry, *tmp;
 305
 306         list_for_each_entry_safe(entry, tmp, head, list)
 307                 del_fsync_inode(entry);
 308 }
 309
 310 static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
 311                         block_t blkaddr, struct dnode_of_data *dn)
 312 {
 313         struct seg_entry *sentry;
 314         unsigned int segno = GET_SEGNO(sbi, blkaddr);
 315         unsigned short blkoff = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
 316         struct f2fs_summary_block *sum_node;
 317         struct f2fs_summary sum;
 318         struct page *sum_page, *node_page;
 319         struct dnode_of_data tdn = *dn;
 320         nid_t ino, nid;
 321         struct inode *inode;
 322         unsigned int offset;
 323         block_t bidx;
 324         int i;
 325
 326         sentry = get_seg_entry(sbi, segno);
 327         if (!f2fs_test_bit(blkoff, sentry->cur_valid_map))
 328                 return 0;
 329
 330         /* Get the previous summary */
 331         for (i = CURSEG_WARM_DATA; i <= CURSEG_COLD_DATA; i++) {
 332                 struct curseg_info *curseg = CURSEG_I(sbi, i);
 333                 if (curseg->segno == segno) {
 334                         sum = curseg->sum_blk->entries[blkoff];
 335                         goto got_it;
 336                 }
 337         }
 338
 339         sum_page = get_sum_page(sbi, segno);
 340         sum_node = (struct f2fs_summary_block *)page_address(sum_page);
 341         sum = sum_node->entries[blkoff];
 342         f2fs_put_page(sum_page, 1);
 343 got_it:
 344         /* Use the locked dnode page and inode */
 345         nid = le32_to_cpu(sum.nid);
 346         if (dn->inode->i_ino == nid) {
 347                 tdn.nid = nid;
 348                 if (!dn->inode_page_locked)
 349                         lock_page(dn->inode_page);
 350                 tdn.node_page = dn->inode_page;
 351                 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
 352                 goto truncate_out;
 353         } else if (dn->nid == nid) {
 354                 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
 355                 goto truncate_out;
 356         }
 357
 358         /* Get the node page */
 359         node_page = get_node_page(sbi, nid);
 360         if (IS_ERR(node_page))
 361                 return PTR_ERR(node_page);
 362
 363         offset = ofs_of_node(node_page);
 364         ino = ino_of_node(node_page);
 365         f2fs_put_page(node_page, 1);
 366
 367         if (ino != dn->inode->i_ino) {
 368                 /* Deallocate previous index in the node page */
 369                 inode = f2fs_iget(sbi->sb, ino);
 370                 if (IS_ERR(inode))
 371                         return PTR_ERR(inode);
 372         } else {
 373                 inode = dn->inode;
 374         }
 375
 376         bidx = start_bidx_of_node(offset, inode) + le16_to_cpu(sum.ofs_in_node);
 377
 378         /*
 379          * if inode page is locked, unlock temporarily, but its reference
 380          * count keeps alive.
 381          */
 382         if (ino == dn->inode->i_ino && dn->inode_page_locked)
 383                 unlock_page(dn->inode_page);
 384
 385         set_new_dnode(&tdn, inode, NULL, NULL, 0);
 386         if (get_dnode_of_data(&tdn, bidx, LOOKUP_NODE))
 387                 goto out;
 388
 389         if (tdn.data_blkaddr == blkaddr)
 390                 truncate_data_blocks_range(&tdn, 1);
 391
 392         f2fs_put_dnode(&tdn);
 393 out:
 394         if (ino != dn->inode->i_ino)
 395                 iput(inode);
 396         else if (dn->inode_page_locked)
 397                 lock_page(dn->inode_page);
 398         return 0;
 399
 400 truncate_out:
 401         if (datablock_addr(tdn.node_page, tdn.ofs_in_node) == blkaddr)
 402                 truncate_data_blocks_range(&tdn, 1);
 403         if (dn->inode->i_ino == nid && !dn->inode_page_locked)
 404                 unlock_page(dn->inode_page);
 405         return 0;
 406 }
 407
 408 static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
 409                                         struct page *page, block_t blkaddr)
 410 {
 411         struct dnode_of_data dn;
 412         struct node_info ni;
 413         unsigned int start, end;
 414         int err = 0, recovered = 0;
 415
 416         /* step 1: recover xattr */
 417         if (IS_INODE(page)) {
 418                 recover_inline_xattr(inode, page);
 419         } else if (f2fs_has_xattr_block(ofs_of_node(page))) {
 420                 /*
 421                  * Deprecated; xattr blocks should be found from cold log.
 422                  * But, we should remain this for backward compatibility.
 423                  */
 424                 recover_xattr_data(inode, page, blkaddr);
 425                 goto out;
 426         }
 427
 428         /* step 2: recover inline data */
 429         if (recover_inline_data(inode, page))
 430                 goto out;
 431
 432         /* step 3: recover data indices */
 433         start = start_bidx_of_node(ofs_of_node(page), inode);
 434         end = start + ADDRS_PER_PAGE(page, inode);
 435
 436         set_new_dnode(&dn, inode, NULL, NULL, 0);
 437
 438         err = get_dnode_of_data(&dn, start, ALLOC_NODE);
 439         if (err)
 440                 goto out;
 441
 442         f2fs_wait_on_page_writeback(dn.node_page, NODE, true);
 443
 444         get_node_info(sbi, dn.nid, &ni);
 445         f2fs_bug_on(sbi, ni.ino != ino_of_node(page));
 446         f2fs_bug_on(sbi, ofs_of_node(dn.node_page) != ofs_of_node(page));
 447
 448         for (; start < end; start++, dn.ofs_in_node++) {
 449                 block_t src, dest;
 450
 451                 src = datablock_addr(dn.node_page, dn.ofs_in_node);
 452                 dest = datablock_addr(page, dn.ofs_in_node);
 453
 454                 /* skip recovering if dest is the same as src */
 455                 if (src == dest)
 456                         continue;
 457
 458                 /* dest is invalid, just invalidate src block */
 459                 if (dest == NULL_ADDR) {
 460                         truncate_data_blocks_range(&dn, 1);
 461                         continue;
 462                 }
 463
 464                 if ((start + 1) << PAGE_SHIFT > i_size_read(inode))
 465                         f2fs_i_size_write(inode, (start + 1) << PAGE_SHIFT);
 466
 467                 /*
 468                  * dest is reserved block, invalidate src block
 469                  * and then reserve one new block in dnode page.
 470                  */
 471                 if (dest == NEW_ADDR) {
 472                         truncate_data_blocks_range(&dn, 1);
 473                         reserve_new_block(&dn);
 474                         continue;
 475                 }
 476
 477                 /* dest is valid block, try to recover from src to dest */
 478                 if (is_valid_blkaddr(sbi, dest, META_POR)) {
 479
 480                         if (src == NULL_ADDR) {
 481                                 err = reserve_new_block(&dn);
 482 #ifdef CONFIG_F2FS_FAULT_INJECTION
 483                                 while (err)
 484                                         err = reserve_new_block(&dn);
 485 #endif
 486                                 /* We should not get -ENOSPC */
 487                                 f2fs_bug_on(sbi, err);
 488                                 if (err)
 489                                         goto err;
 490                         }
 491
 492                         /* Check the previous node page having this index */
 493                         err = check_index_in_prev_nodes(sbi, dest, &dn);
 494                         if (err)
 495                                 goto err;
 496
 497                         /* write dummy data page */
 498                         f2fs_replace_block(sbi, &dn, src, dest,
 499                                                 ni.version, false, false);
 500                         recovered++;
 501                 }
 502         }
 503
 504         copy_node_footer(dn.node_page, page);
 505         fill_node_footer(dn.node_page, dn.nid, ni.ino,
 506                                         ofs_of_node(page), false);
 507         set_page_dirty(dn.node_page);
 508 err:
 509         f2fs_put_dnode(&dn);
 510 out:
 511         f2fs_msg(sbi->sb, KERN_NOTICE,
 512                 "recover_data: ino = %lx, recovered = %d blocks, err = %d",
 513                 inode->i_ino, recovered, err);
 514         return err;
 515 }
 516
 517 static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list,
 518                                                 struct list_head *dir_list)
 519 {
 520         unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
 521         struct curseg_info *curseg;
 522         struct page *page = NULL;
 523         int err = 0;
 524         block_t blkaddr;
 525
 526         /* get node pages in the current segment */
 527         curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
 528         blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
 529
 530         while (1) {
 531                 struct fsync_inode_entry *entry;
 532
 533                 if (!is_valid_blkaddr(sbi, blkaddr, META_POR))
 534                         break;
 535
 536                 ra_meta_pages_cond(sbi, blkaddr);
 537
 538                 page = get_tmp_page(sbi, blkaddr);
 539
 540                 if (cp_ver != cpver_of_node(page)) {
 541                         f2fs_put_page(page, 1);
 542                         break;
 543                 }
 544
 545                 entry = get_fsync_inode(inode_list, ino_of_node(page));
 546                 if (!entry)
 547                         goto next;
 548                 /*
 549                  * inode(x) | CP | inode(x) | dnode(F)
 550                  * In this case, we can lose the latest inode(x).
 551                  * So, call recover_inode for the inode update.
 552                  */
 553                 if (IS_INODE(page))
 554                         recover_inode(entry->inode, page);
 555                 if (entry->last_dentry == blkaddr) {
 556                         err = recover_dentry(entry->inode, page, dir_list);
 557                         if (err) {
 558                                 f2fs_put_page(page, 1);
 559                                 break;
 560                         }
 561                 }
 562                 err = do_recover_data(sbi, entry->inode, page, blkaddr);
 563                 if (err) {
 564                         f2fs_put_page(page, 1);
 565                         break;
 566                 }
 567
 568                 if (entry->blkaddr == blkaddr)
 569                         del_fsync_inode(entry);
 570 next:
 571                 /* check next segment */
 572                 blkaddr = next_blkaddr_of_node(page);
 573                 f2fs_put_page(page, 1);
 574         }
 575         if (!err)
 576                 allocate_new_segments(sbi);
 577         return err;
 578 }
 579
 580 int recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
 581 {
 582         struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
 583         struct list_head inode_list;
 584         struct list_head dir_list;
 585         block_t blkaddr;
 586         int err;
 587         int ret = 0;
 588         bool need_writecp = false;
 589
 590         fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
 591                         sizeof(struct fsync_inode_entry));
 592         if (!fsync_entry_slab)
 593                 return -ENOMEM;
 594
 595         INIT_LIST_HEAD(&inode_list);
 596         INIT_LIST_HEAD(&dir_list);
 597
 598         /* prevent checkpoint */
 599         mutex_lock(&sbi->cp_mutex);
 600
 601         blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
 602
 603         /* step #1: find fsynced inode numbers */
 604         err = find_fsync_dnodes(sbi, &inode_list);
 605         if (err || list_empty(&inode_list))
 606                 goto out;
 607
 608         if (check_only) {
 609                 ret = 1;
 610                 goto out;
 611         }
 612
 613         need_writecp = true;
 614
 615         /* step #2: recover data */
 616         err = recover_data(sbi, &inode_list, &dir_list);
 617         if (!err)
 618                 f2fs_bug_on(sbi, !list_empty(&inode_list));
 619 out:
 620         destroy_fsync_dnodes(&inode_list);
 621
 622         /* truncate meta pages to be used by the recovery */
 623         truncate_inode_pages_range(META_MAPPING(sbi),
 624                         (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1);
 625
 626         if (err) {
 627                 truncate_inode_pages_final(NODE_MAPPING(sbi));
 628                 truncate_inode_pages_final(META_MAPPING(sbi));
 629         }
 630
 631         clear_sbi_flag(sbi, SBI_POR_DOING);
 632         if (err) {
 633                 bool invalidate = false;
 634
 635                 if (test_opt(sbi, LFS)) {
 636                         update_meta_page(sbi, NULL, blkaddr);
 637                         invalidate = true;
 638                 } else if (discard_next_dnode(sbi, blkaddr)) {
 639                         invalidate = true;
 640                 }
 641
 642                 f2fs_wait_all_discard_bio(sbi);
 643
 644                 /* Flush all the NAT/SIT pages */
 645                 while (get_pages(sbi, F2FS_DIRTY_META))
 646                         sync_meta_pages(sbi, META, LONG_MAX);
 647
 648                 /* invalidate temporary meta page */
 649                 if (invalidate)
 650                         invalidate_mapping_pages(META_MAPPING(sbi),
 651                                                         blkaddr, blkaddr);
 652
 653                 set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG);
 654                 mutex_unlock(&sbi->cp_mutex);
 655         } else if (need_writecp) {
 656                 struct cp_control cpc = {
 657                         .reason = CP_RECOVERY,
 658                 };
 659                 mutex_unlock(&sbi->cp_mutex);
 660                 err = write_checkpoint(sbi, &cpc);
 661         } else {
 662                 mutex_unlock(&sbi->cp_mutex);
 663         }
 664
 665         destroy_fsync_dnodes(&dir_list);
 666         kmem_cache_destroy(fsync_entry_slab);
 667         return ret ? ret: err;
 668 }