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 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 } 146 147 static 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; 176 retry: 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; 214 215 out_put: 216 f2fs_put_page(page, 0); 217 out: 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 } 227 228 static 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 } 254 255 static 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 } 266 267 static 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 } 329 330 static 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; 399 next: 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 } 419 420 static 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 } 427 428 static 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); 463 got_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); 522 out: 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; 528 529 truncate_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 } 536 537 static 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 f2fs_recover_inline_xattr(inode, page); 548 } else if (f2fs_has_xattr_block(ofs_of_node(page))) { 549 err = f2fs_recover_xattr_data(inode, page); 550 if (!err) 551 recovered++; 552 goto out; 553 } 554 555 /* step 2: recover inline data */ 556 if (f2fs_recover_inline_data(inode, page)) 557 goto out; 558 559 /* step 3: recover data indices */ 560 start = f2fs_start_bidx_of_node(ofs_of_node(page), inode); 561 end = start + ADDRS_PER_PAGE(page, inode); 562 563 set_new_dnode(&dn, inode, NULL, NULL, 0); 564 retry_dn: 565 err = f2fs_get_dnode_of_data(&dn, start, ALLOC_NODE); 566 if (err) { 567 if (err == -ENOMEM) { 568 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT); 569 goto retry_dn; 570 } 571 goto out; 572 } 573 574 f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true); 575 576 err = f2fs_get_node_info(sbi, dn.nid, &ni); 577 if (err) 578 goto err; 579 580 f2fs_bug_on(sbi, ni.ino != ino_of_node(page)); 581 582 if (ofs_of_node(dn.node_page) != ofs_of_node(page)) { 583 f2fs_warn(sbi, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u", 584 inode->i_ino, ofs_of_node(dn.node_page), 585 ofs_of_node(page)); 586 err = -EFSCORRUPTED; 587 goto err; 588 } 589 590 for (; start < end; start++, dn.ofs_in_node++) { 591 block_t src, dest; 592 593 src = f2fs_data_blkaddr(&dn); 594 dest = data_blkaddr(dn.inode, page, dn.ofs_in_node); 595 596 if (__is_valid_data_blkaddr(src) && 597 !f2fs_is_valid_blkaddr(sbi, src, META_POR)) { 598 err = -EFSCORRUPTED; 599 goto err; 600 } 601 602 if (__is_valid_data_blkaddr(dest) && 603 !f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 604 err = -EFSCORRUPTED; 605 goto err; 606 } 607 608 /* skip recovering if dest is the same as src */ 609 if (src == dest) 610 continue; 611 612 /* dest is invalid, just invalidate src block */ 613 if (dest == NULL_ADDR) { 614 f2fs_truncate_data_blocks_range(&dn, 1); 615 continue; 616 } 617 618 if (!file_keep_isize(inode) && 619 (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT))) 620 f2fs_i_size_write(inode, 621 (loff_t)(start + 1) << PAGE_SHIFT); 622 623 /* 624 * dest is reserved block, invalidate src block 625 * and then reserve one new block in dnode page. 626 */ 627 if (dest == NEW_ADDR) { 628 f2fs_truncate_data_blocks_range(&dn, 1); 629 f2fs_reserve_new_block(&dn); 630 continue; 631 } 632 633 /* dest is valid block, try to recover from src to dest */ 634 if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 635 636 if (src == NULL_ADDR) { 637 err = f2fs_reserve_new_block(&dn); 638 while (err && 639 IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) 640 err = f2fs_reserve_new_block(&dn); 641 /* We should not get -ENOSPC */ 642 f2fs_bug_on(sbi, err); 643 if (err) 644 goto err; 645 } 646 retry_prev: 647 /* Check the previous node page having this index */ 648 err = check_index_in_prev_nodes(sbi, dest, &dn); 649 if (err) { 650 if (err == -ENOMEM) { 651 congestion_wait(BLK_RW_ASYNC, 652 DEFAULT_IO_TIMEOUT); 653 goto retry_prev; 654 } 655 goto err; 656 } 657 658 /* write dummy data page */ 659 f2fs_replace_block(sbi, &dn, src, dest, 660 ni.version, false, false); 661 recovered++; 662 } 663 } 664 665 copy_node_footer(dn.node_page, page); 666 fill_node_footer(dn.node_page, dn.nid, ni.ino, 667 ofs_of_node(page), false); 668 set_page_dirty(dn.node_page); 669 err: 670 f2fs_put_dnode(&dn); 671 out: 672 f2fs_notice(sbi, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d", 673 inode->i_ino, file_keep_isize(inode) ? "keep" : "recover", 674 recovered, err); 675 return err; 676 } 677 678 static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list, 679 struct list_head *tmp_inode_list, struct list_head *dir_list) 680 { 681 struct curseg_info *curseg; 682 struct page *page = NULL; 683 int err = 0; 684 block_t blkaddr; 685 686 /* get node pages in the current segment */ 687 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); 688 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); 689 690 while (1) { 691 struct fsync_inode_entry *entry; 692 693 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR)) 694 break; 695 696 f2fs_ra_meta_pages_cond(sbi, blkaddr); 697 698 page = f2fs_get_tmp_page(sbi, blkaddr); 699 if (IS_ERR(page)) { 700 err = PTR_ERR(page); 701 break; 702 } 703 704 if (!is_recoverable_dnode(page)) { 705 f2fs_put_page(page, 1); 706 break; 707 } 708 709 entry = get_fsync_inode(inode_list, ino_of_node(page)); 710 if (!entry) 711 goto next; 712 /* 713 * inode(x) | CP | inode(x) | dnode(F) 714 * In this case, we can lose the latest inode(x). 715 * So, call recover_inode for the inode update. 716 */ 717 if (IS_INODE(page)) { 718 err = recover_inode(entry->inode, page); 719 if (err) { 720 f2fs_put_page(page, 1); 721 break; 722 } 723 } 724 if (entry->last_dentry == blkaddr) { 725 err = recover_dentry(entry->inode, page, dir_list); 726 if (err) { 727 f2fs_put_page(page, 1); 728 break; 729 } 730 } 731 err = do_recover_data(sbi, entry->inode, page); 732 if (err) { 733 f2fs_put_page(page, 1); 734 break; 735 } 736 737 if (entry->blkaddr == blkaddr) 738 list_move_tail(&entry->list, tmp_inode_list); 739 next: 740 /* check next segment */ 741 blkaddr = next_blkaddr_of_node(page); 742 f2fs_put_page(page, 1); 743 } 744 if (!err) 745 f2fs_allocate_new_segments(sbi, NO_CHECK_TYPE); 746 return err; 747 } 748 749 int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only) 750 { 751 struct list_head inode_list, tmp_inode_list; 752 struct list_head dir_list; 753 int err; 754 int ret = 0; 755 unsigned long s_flags = sbi->sb->s_flags; 756 bool need_writecp = false; 757 bool fix_curseg_write_pointer = false; 758 #ifdef CONFIG_QUOTA 759 int quota_enabled; 760 #endif 761 762 if (s_flags & SB_RDONLY) { 763 f2fs_info(sbi, "recover fsync data on readonly fs"); 764 sbi->sb->s_flags &= ~SB_RDONLY; 765 } 766 767 #ifdef CONFIG_QUOTA 768 /* Needed for iput() to work correctly and not trash data */ 769 sbi->sb->s_flags |= SB_ACTIVE; 770 /* Turn on quotas so that they are updated correctly */ 771 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY); 772 #endif 773 774 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry", 775 sizeof(struct fsync_inode_entry)); 776 if (!fsync_entry_slab) { 777 err = -ENOMEM; 778 goto out; 779 } 780 781 INIT_LIST_HEAD(&inode_list); 782 INIT_LIST_HEAD(&tmp_inode_list); 783 INIT_LIST_HEAD(&dir_list); 784 785 /* prevent checkpoint */ 786 mutex_lock(&sbi->cp_mutex); 787 788 /* step #1: find fsynced inode numbers */ 789 err = find_fsync_dnodes(sbi, &inode_list, check_only); 790 if (err || list_empty(&inode_list)) 791 goto skip; 792 793 if (check_only) { 794 ret = 1; 795 goto skip; 796 } 797 798 need_writecp = true; 799 800 /* step #2: recover data */ 801 err = recover_data(sbi, &inode_list, &tmp_inode_list, &dir_list); 802 if (!err) 803 f2fs_bug_on(sbi, !list_empty(&inode_list)); 804 else { 805 /* restore s_flags to let iput() trash data */ 806 sbi->sb->s_flags = s_flags; 807 } 808 skip: 809 fix_curseg_write_pointer = !check_only || list_empty(&inode_list); 810 811 destroy_fsync_dnodes(&inode_list, err); 812 destroy_fsync_dnodes(&tmp_inode_list, err); 813 814 /* truncate meta pages to be used by the recovery */ 815 truncate_inode_pages_range(META_MAPPING(sbi), 816 (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1); 817 818 if (err) { 819 truncate_inode_pages_final(NODE_MAPPING(sbi)); 820 truncate_inode_pages_final(META_MAPPING(sbi)); 821 } 822 823 /* 824 * If fsync data succeeds or there is no fsync data to recover, 825 * and the f2fs is not read only, check and fix zoned block devices' 826 * write pointer consistency. 827 */ 828 if (!err && fix_curseg_write_pointer && !f2fs_readonly(sbi->sb) && 829 f2fs_sb_has_blkzoned(sbi)) { 830 err = f2fs_fix_curseg_write_pointer(sbi); 831 ret = err; 832 } 833 834 if (!err) 835 clear_sbi_flag(sbi, SBI_POR_DOING); 836 837 mutex_unlock(&sbi->cp_mutex); 838 839 /* let's drop all the directory inodes for clean checkpoint */ 840 destroy_fsync_dnodes(&dir_list, err); 841 842 if (need_writecp) { 843 set_sbi_flag(sbi, SBI_IS_RECOVERED); 844 845 if (!err) { 846 struct cp_control cpc = { 847 .reason = CP_RECOVERY, 848 }; 849 err = f2fs_write_checkpoint(sbi, &cpc); 850 } 851 } 852 853 kmem_cache_destroy(fsync_entry_slab); 854 out: 855 #ifdef CONFIG_QUOTA 856 /* Turn quotas off */ 857 if (quota_enabled) 858 f2fs_quota_off_umount(sbi->sb); 859 #endif 860 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 861 862 return ret ? ret: err; 863 } 864