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 <asm/unaligned.h> 9 #include <linux/fs.h> 10 #include <linux/f2fs_fs.h> 11 #include <linux/sched/mm.h> 12 #include "f2fs.h" 13 #include "node.h" 14 #include "segment.h" 15 16 /* 17 * Roll forward recovery scenarios. 18 * 19 * [Term] F: fsync_mark, D: dentry_mark 20 * 21 * 1. inode(x) | CP | inode(x) | dnode(F) 22 * -> Update the latest inode(x). 23 * 24 * 2. inode(x) | CP | inode(F) | dnode(F) 25 * -> No problem. 26 * 27 * 3. inode(x) | CP | dnode(F) | inode(x) 28 * -> Recover to the latest dnode(F), and drop the last inode(x) 29 * 30 * 4. inode(x) | CP | dnode(F) | inode(F) 31 * -> No problem. 32 * 33 * 5. CP | inode(x) | dnode(F) 34 * -> The inode(DF) was missing. Should drop this dnode(F). 35 * 36 * 6. CP | inode(DF) | dnode(F) 37 * -> No problem. 38 * 39 * 7. CP | dnode(F) | inode(DF) 40 * -> If f2fs_iget fails, then goto next to find inode(DF). 41 * 42 * 8. CP | dnode(F) | inode(x) 43 * -> If f2fs_iget fails, then goto next to find inode(DF). 44 * But it will fail due to no inode(DF). 45 */ 46 47 static struct kmem_cache *fsync_entry_slab; 48 49 #if IS_ENABLED(CONFIG_UNICODE) 50 extern struct kmem_cache *f2fs_cf_name_slab; 51 #endif 52 53 bool f2fs_space_for_roll_forward(struct f2fs_sb_info *sbi) 54 { 55 s64 nalloc = percpu_counter_sum_positive(&sbi->alloc_valid_block_count); 56 57 if (sbi->last_valid_block_count + nalloc > sbi->user_block_count) 58 return false; 59 if (NM_I(sbi)->max_rf_node_blocks && 60 percpu_counter_sum_positive(&sbi->rf_node_block_count) >= 61 NM_I(sbi)->max_rf_node_blocks) 62 return false; 63 return true; 64 } 65 66 static struct fsync_inode_entry *get_fsync_inode(struct list_head *head, 67 nid_t ino) 68 { 69 struct fsync_inode_entry *entry; 70 71 list_for_each_entry(entry, head, list) 72 if (entry->inode->i_ino == ino) 73 return entry; 74 75 return NULL; 76 } 77 78 static struct fsync_inode_entry *add_fsync_inode(struct f2fs_sb_info *sbi, 79 struct list_head *head, nid_t ino, bool quota_inode) 80 { 81 struct inode *inode; 82 struct fsync_inode_entry *entry; 83 int err; 84 85 inode = f2fs_iget_retry(sbi->sb, ino); 86 if (IS_ERR(inode)) 87 return ERR_CAST(inode); 88 89 err = f2fs_dquot_initialize(inode); 90 if (err) 91 goto err_out; 92 93 if (quota_inode) { 94 err = dquot_alloc_inode(inode); 95 if (err) 96 goto err_out; 97 } 98 99 entry = f2fs_kmem_cache_alloc(fsync_entry_slab, 100 GFP_F2FS_ZERO, true, NULL); 101 entry->inode = inode; 102 list_add_tail(&entry->list, head); 103 104 return entry; 105 err_out: 106 iput(inode); 107 return ERR_PTR(err); 108 } 109 110 static void del_fsync_inode(struct fsync_inode_entry *entry, int drop) 111 { 112 if (drop) { 113 /* inode should not be recovered, drop it */ 114 f2fs_inode_synced(entry->inode); 115 } 116 iput(entry->inode); 117 list_del(&entry->list); 118 kmem_cache_free(fsync_entry_slab, entry); 119 } 120 121 static int init_recovered_filename(const struct inode *dir, 122 struct f2fs_inode *raw_inode, 123 struct f2fs_filename *fname, 124 struct qstr *usr_fname) 125 { 126 int err; 127 128 memset(fname, 0, sizeof(*fname)); 129 fname->disk_name.len = le32_to_cpu(raw_inode->i_namelen); 130 fname->disk_name.name = raw_inode->i_name; 131 132 if (WARN_ON(fname->disk_name.len > F2FS_NAME_LEN)) 133 return -ENAMETOOLONG; 134 135 if (!IS_ENCRYPTED(dir)) { 136 usr_fname->name = fname->disk_name.name; 137 usr_fname->len = fname->disk_name.len; 138 fname->usr_fname = usr_fname; 139 } 140 141 /* Compute the hash of the filename */ 142 if (IS_ENCRYPTED(dir) && IS_CASEFOLDED(dir)) { 143 /* 144 * In this case the hash isn't computable without the key, so it 145 * was saved on-disk. 146 */ 147 if (fname->disk_name.len + sizeof(f2fs_hash_t) > F2FS_NAME_LEN) 148 return -EINVAL; 149 fname->hash = get_unaligned((f2fs_hash_t *) 150 &raw_inode->i_name[fname->disk_name.len]); 151 } else if (IS_CASEFOLDED(dir)) { 152 err = f2fs_init_casefolded_name(dir, fname); 153 if (err) 154 return err; 155 f2fs_hash_filename(dir, fname); 156 #if IS_ENABLED(CONFIG_UNICODE) 157 /* Case-sensitive match is fine for recovery */ 158 kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name); 159 fname->cf_name.name = NULL; 160 #endif 161 } else { 162 f2fs_hash_filename(dir, fname); 163 } 164 return 0; 165 } 166 167 static int recover_dentry(struct inode *inode, struct page *ipage, 168 struct list_head *dir_list) 169 { 170 struct f2fs_inode *raw_inode = F2FS_INODE(ipage); 171 nid_t pino = le32_to_cpu(raw_inode->i_pino); 172 struct f2fs_dir_entry *de; 173 struct f2fs_filename fname; 174 struct qstr usr_fname; 175 struct page *page; 176 struct inode *dir, *einode; 177 struct fsync_inode_entry *entry; 178 int err = 0; 179 char *name; 180 181 entry = get_fsync_inode(dir_list, pino); 182 if (!entry) { 183 entry = add_fsync_inode(F2FS_I_SB(inode), dir_list, 184 pino, false); 185 if (IS_ERR(entry)) { 186 dir = ERR_CAST(entry); 187 err = PTR_ERR(entry); 188 goto out; 189 } 190 } 191 192 dir = entry->inode; 193 err = init_recovered_filename(dir, raw_inode, &fname, &usr_fname); 194 if (err) 195 goto out; 196 retry: 197 de = __f2fs_find_entry(dir, &fname, &page); 198 if (de && inode->i_ino == le32_to_cpu(de->ino)) 199 goto out_put; 200 201 if (de) { 202 einode = f2fs_iget_retry(inode->i_sb, le32_to_cpu(de->ino)); 203 if (IS_ERR(einode)) { 204 WARN_ON(1); 205 err = PTR_ERR(einode); 206 if (err == -ENOENT) 207 err = -EEXIST; 208 goto out_put; 209 } 210 211 err = f2fs_dquot_initialize(einode); 212 if (err) { 213 iput(einode); 214 goto out_put; 215 } 216 217 err = f2fs_acquire_orphan_inode(F2FS_I_SB(inode)); 218 if (err) { 219 iput(einode); 220 goto out_put; 221 } 222 f2fs_delete_entry(de, page, dir, einode); 223 iput(einode); 224 goto retry; 225 } else if (IS_ERR(page)) { 226 err = PTR_ERR(page); 227 } else { 228 err = f2fs_add_dentry(dir, &fname, inode, 229 inode->i_ino, inode->i_mode); 230 } 231 if (err == -ENOMEM) 232 goto retry; 233 goto out; 234 235 out_put: 236 f2fs_put_page(page, 0); 237 out: 238 if (file_enc_name(inode)) 239 name = "<encrypted>"; 240 else 241 name = raw_inode->i_name; 242 f2fs_notice(F2FS_I_SB(inode), "%s: ino = %x, name = %s, dir = %lx, err = %d", 243 __func__, ino_of_node(ipage), name, 244 IS_ERR(dir) ? 0 : dir->i_ino, err); 245 return err; 246 } 247 248 static int recover_quota_data(struct inode *inode, struct page *page) 249 { 250 struct f2fs_inode *raw = F2FS_INODE(page); 251 struct iattr attr; 252 uid_t i_uid = le32_to_cpu(raw->i_uid); 253 gid_t i_gid = le32_to_cpu(raw->i_gid); 254 int err; 255 256 memset(&attr, 0, sizeof(attr)); 257 258 attr.ia_vfsuid = VFSUIDT_INIT(make_kuid(inode->i_sb->s_user_ns, i_uid)); 259 attr.ia_vfsgid = VFSGIDT_INIT(make_kgid(inode->i_sb->s_user_ns, i_gid)); 260 261 if (!vfsuid_eq(attr.ia_vfsuid, i_uid_into_vfsuid(&nop_mnt_idmap, inode))) 262 attr.ia_valid |= ATTR_UID; 263 if (!vfsgid_eq(attr.ia_vfsgid, i_gid_into_vfsgid(&nop_mnt_idmap, inode))) 264 attr.ia_valid |= ATTR_GID; 265 266 if (!attr.ia_valid) 267 return 0; 268 269 err = dquot_transfer(&nop_mnt_idmap, inode, &attr); 270 if (err) 271 set_sbi_flag(F2FS_I_SB(inode), SBI_QUOTA_NEED_REPAIR); 272 return err; 273 } 274 275 static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri) 276 { 277 if (ri->i_inline & F2FS_PIN_FILE) 278 set_inode_flag(inode, FI_PIN_FILE); 279 else 280 clear_inode_flag(inode, FI_PIN_FILE); 281 if (ri->i_inline & F2FS_DATA_EXIST) 282 set_inode_flag(inode, FI_DATA_EXIST); 283 else 284 clear_inode_flag(inode, FI_DATA_EXIST); 285 } 286 287 static int recover_inode(struct inode *inode, struct page *page) 288 { 289 struct f2fs_inode *raw = F2FS_INODE(page); 290 char *name; 291 int err; 292 293 inode->i_mode = le16_to_cpu(raw->i_mode); 294 295 err = recover_quota_data(inode, page); 296 if (err) 297 return err; 298 299 i_uid_write(inode, le32_to_cpu(raw->i_uid)); 300 i_gid_write(inode, le32_to_cpu(raw->i_gid)); 301 302 if (raw->i_inline & F2FS_EXTRA_ATTR) { 303 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)) && 304 F2FS_FITS_IN_INODE(raw, le16_to_cpu(raw->i_extra_isize), 305 i_projid)) { 306 projid_t i_projid; 307 kprojid_t kprojid; 308 309 i_projid = (projid_t)le32_to_cpu(raw->i_projid); 310 kprojid = make_kprojid(&init_user_ns, i_projid); 311 312 if (!projid_eq(kprojid, F2FS_I(inode)->i_projid)) { 313 err = f2fs_transfer_project_quota(inode, 314 kprojid); 315 if (err) 316 return err; 317 F2FS_I(inode)->i_projid = kprojid; 318 } 319 } 320 } 321 322 f2fs_i_size_write(inode, le64_to_cpu(raw->i_size)); 323 inode_set_atime(inode, le64_to_cpu(raw->i_atime), 324 le32_to_cpu(raw->i_atime_nsec)); 325 inode_set_ctime(inode, le64_to_cpu(raw->i_ctime), 326 le32_to_cpu(raw->i_ctime_nsec)); 327 inode_set_mtime(inode, le64_to_cpu(raw->i_mtime), 328 le32_to_cpu(raw->i_mtime_nsec)); 329 330 F2FS_I(inode)->i_advise = raw->i_advise; 331 F2FS_I(inode)->i_flags = le32_to_cpu(raw->i_flags); 332 f2fs_set_inode_flags(inode); 333 F2FS_I(inode)->i_gc_failures = le16_to_cpu(raw->i_gc_failures); 334 335 recover_inline_flags(inode, raw); 336 337 f2fs_mark_inode_dirty_sync(inode, true); 338 339 if (file_enc_name(inode)) 340 name = "<encrypted>"; 341 else 342 name = F2FS_INODE(page)->i_name; 343 344 f2fs_notice(F2FS_I_SB(inode), "recover_inode: ino = %x, name = %s, inline = %x", 345 ino_of_node(page), name, raw->i_inline); 346 return 0; 347 } 348 349 static unsigned int adjust_por_ra_blocks(struct f2fs_sb_info *sbi, 350 unsigned int ra_blocks, unsigned int blkaddr, 351 unsigned int next_blkaddr) 352 { 353 if (blkaddr + 1 == next_blkaddr) 354 ra_blocks = min_t(unsigned int, RECOVERY_MAX_RA_BLOCKS, 355 ra_blocks * 2); 356 else if (next_blkaddr % BLKS_PER_SEG(sbi)) 357 ra_blocks = max_t(unsigned int, RECOVERY_MIN_RA_BLOCKS, 358 ra_blocks / 2); 359 return ra_blocks; 360 } 361 362 /* Detect looped node chain with Floyd's cycle detection algorithm. */ 363 static int sanity_check_node_chain(struct f2fs_sb_info *sbi, block_t blkaddr, 364 block_t *blkaddr_fast, bool *is_detecting) 365 { 366 unsigned int ra_blocks = RECOVERY_MAX_RA_BLOCKS; 367 struct page *page = NULL; 368 int i; 369 370 if (!*is_detecting) 371 return 0; 372 373 for (i = 0; i < 2; i++) { 374 if (!f2fs_is_valid_blkaddr(sbi, *blkaddr_fast, META_POR)) { 375 *is_detecting = false; 376 return 0; 377 } 378 379 page = f2fs_get_tmp_page(sbi, *blkaddr_fast); 380 if (IS_ERR(page)) 381 return PTR_ERR(page); 382 383 if (!is_recoverable_dnode(page)) { 384 f2fs_put_page(page, 1); 385 *is_detecting = false; 386 return 0; 387 } 388 389 ra_blocks = adjust_por_ra_blocks(sbi, ra_blocks, *blkaddr_fast, 390 next_blkaddr_of_node(page)); 391 392 *blkaddr_fast = next_blkaddr_of_node(page); 393 f2fs_put_page(page, 1); 394 395 f2fs_ra_meta_pages_cond(sbi, *blkaddr_fast, ra_blocks); 396 } 397 398 if (*blkaddr_fast == blkaddr) { 399 f2fs_notice(sbi, "%s: Detect looped node chain on blkaddr:%u." 400 " Run fsck to fix it.", __func__, blkaddr); 401 return -EINVAL; 402 } 403 return 0; 404 } 405 406 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head, 407 bool check_only) 408 { 409 struct curseg_info *curseg; 410 struct page *page = NULL; 411 block_t blkaddr, blkaddr_fast; 412 bool is_detecting = true; 413 int err = 0; 414 415 /* get node pages in the current segment */ 416 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); 417 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); 418 blkaddr_fast = blkaddr; 419 420 while (1) { 421 struct fsync_inode_entry *entry; 422 423 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR)) 424 return 0; 425 426 page = f2fs_get_tmp_page(sbi, blkaddr); 427 if (IS_ERR(page)) { 428 err = PTR_ERR(page); 429 break; 430 } 431 432 if (!is_recoverable_dnode(page)) { 433 f2fs_put_page(page, 1); 434 break; 435 } 436 437 if (!is_fsync_dnode(page)) 438 goto next; 439 440 entry = get_fsync_inode(head, ino_of_node(page)); 441 if (!entry) { 442 bool quota_inode = false; 443 444 if (!check_only && 445 IS_INODE(page) && is_dent_dnode(page)) { 446 err = f2fs_recover_inode_page(sbi, page); 447 if (err) { 448 f2fs_put_page(page, 1); 449 break; 450 } 451 quota_inode = true; 452 } 453 454 /* 455 * CP | dnode(F) | inode(DF) 456 * For this case, we should not give up now. 457 */ 458 entry = add_fsync_inode(sbi, head, ino_of_node(page), 459 quota_inode); 460 if (IS_ERR(entry)) { 461 err = PTR_ERR(entry); 462 if (err == -ENOENT) 463 goto next; 464 f2fs_put_page(page, 1); 465 break; 466 } 467 } 468 entry->blkaddr = blkaddr; 469 470 if (IS_INODE(page) && is_dent_dnode(page)) 471 entry->last_dentry = blkaddr; 472 next: 473 /* check next segment */ 474 blkaddr = next_blkaddr_of_node(page); 475 f2fs_put_page(page, 1); 476 477 err = sanity_check_node_chain(sbi, blkaddr, &blkaddr_fast, 478 &is_detecting); 479 if (err) 480 break; 481 } 482 return err; 483 } 484 485 static void destroy_fsync_dnodes(struct list_head *head, int drop) 486 { 487 struct fsync_inode_entry *entry, *tmp; 488 489 list_for_each_entry_safe(entry, tmp, head, list) 490 del_fsync_inode(entry, drop); 491 } 492 493 static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi, 494 block_t blkaddr, struct dnode_of_data *dn) 495 { 496 struct seg_entry *sentry; 497 unsigned int segno = GET_SEGNO(sbi, blkaddr); 498 unsigned short blkoff = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); 499 struct f2fs_summary_block *sum_node; 500 struct f2fs_summary sum; 501 struct page *sum_page, *node_page; 502 struct dnode_of_data tdn = *dn; 503 nid_t ino, nid; 504 struct inode *inode; 505 unsigned int offset, ofs_in_node, max_addrs; 506 block_t bidx; 507 int i; 508 509 sentry = get_seg_entry(sbi, segno); 510 if (!f2fs_test_bit(blkoff, sentry->cur_valid_map)) 511 return 0; 512 513 /* Get the previous summary */ 514 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { 515 struct curseg_info *curseg = CURSEG_I(sbi, i); 516 517 if (curseg->segno == segno) { 518 sum = curseg->sum_blk->entries[blkoff]; 519 goto got_it; 520 } 521 } 522 523 sum_page = f2fs_get_sum_page(sbi, segno); 524 if (IS_ERR(sum_page)) 525 return PTR_ERR(sum_page); 526 sum_node = (struct f2fs_summary_block *)page_address(sum_page); 527 sum = sum_node->entries[blkoff]; 528 f2fs_put_page(sum_page, 1); 529 got_it: 530 /* Use the locked dnode page and inode */ 531 nid = le32_to_cpu(sum.nid); 532 ofs_in_node = le16_to_cpu(sum.ofs_in_node); 533 534 max_addrs = ADDRS_PER_PAGE(dn->node_page, dn->inode); 535 if (ofs_in_node >= max_addrs) { 536 f2fs_err(sbi, "Inconsistent ofs_in_node:%u in summary, ino:%lu, nid:%u, max:%u", 537 ofs_in_node, dn->inode->i_ino, nid, max_addrs); 538 f2fs_handle_error(sbi, ERROR_INCONSISTENT_SUMMARY); 539 return -EFSCORRUPTED; 540 } 541 542 if (dn->inode->i_ino == nid) { 543 tdn.nid = nid; 544 if (!dn->inode_page_locked) 545 lock_page(dn->inode_page); 546 tdn.node_page = dn->inode_page; 547 tdn.ofs_in_node = ofs_in_node; 548 goto truncate_out; 549 } else if (dn->nid == nid) { 550 tdn.ofs_in_node = ofs_in_node; 551 goto truncate_out; 552 } 553 554 /* Get the node page */ 555 node_page = f2fs_get_node_page(sbi, nid); 556 if (IS_ERR(node_page)) 557 return PTR_ERR(node_page); 558 559 offset = ofs_of_node(node_page); 560 ino = ino_of_node(node_page); 561 f2fs_put_page(node_page, 1); 562 563 if (ino != dn->inode->i_ino) { 564 int ret; 565 566 /* Deallocate previous index in the node page */ 567 inode = f2fs_iget_retry(sbi->sb, ino); 568 if (IS_ERR(inode)) 569 return PTR_ERR(inode); 570 571 ret = f2fs_dquot_initialize(inode); 572 if (ret) { 573 iput(inode); 574 return ret; 575 } 576 } else { 577 inode = dn->inode; 578 } 579 580 bidx = f2fs_start_bidx_of_node(offset, inode) + 581 le16_to_cpu(sum.ofs_in_node); 582 583 /* 584 * if inode page is locked, unlock temporarily, but its reference 585 * count keeps alive. 586 */ 587 if (ino == dn->inode->i_ino && dn->inode_page_locked) 588 unlock_page(dn->inode_page); 589 590 set_new_dnode(&tdn, inode, NULL, NULL, 0); 591 if (f2fs_get_dnode_of_data(&tdn, bidx, LOOKUP_NODE)) 592 goto out; 593 594 if (tdn.data_blkaddr == blkaddr) 595 f2fs_truncate_data_blocks_range(&tdn, 1); 596 597 f2fs_put_dnode(&tdn); 598 out: 599 if (ino != dn->inode->i_ino) 600 iput(inode); 601 else if (dn->inode_page_locked) 602 lock_page(dn->inode_page); 603 return 0; 604 605 truncate_out: 606 if (f2fs_data_blkaddr(&tdn) == blkaddr) 607 f2fs_truncate_data_blocks_range(&tdn, 1); 608 if (dn->inode->i_ino == nid && !dn->inode_page_locked) 609 unlock_page(dn->inode_page); 610 return 0; 611 } 612 613 static int f2fs_reserve_new_block_retry(struct dnode_of_data *dn) 614 { 615 int i, err = 0; 616 617 for (i = DEFAULT_FAILURE_RETRY_COUNT; i > 0; i--) { 618 err = f2fs_reserve_new_block(dn); 619 if (!err) 620 break; 621 } 622 623 return err; 624 } 625 626 static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode, 627 struct page *page) 628 { 629 struct dnode_of_data dn; 630 struct node_info ni; 631 unsigned int start, end; 632 int err = 0, recovered = 0; 633 634 /* step 1: recover xattr */ 635 if (IS_INODE(page)) { 636 err = f2fs_recover_inline_xattr(inode, page); 637 if (err) 638 goto out; 639 } else if (f2fs_has_xattr_block(ofs_of_node(page))) { 640 err = f2fs_recover_xattr_data(inode, page); 641 if (!err) 642 recovered++; 643 goto out; 644 } 645 646 /* step 2: recover inline data */ 647 err = f2fs_recover_inline_data(inode, page); 648 if (err) { 649 if (err == 1) 650 err = 0; 651 goto out; 652 } 653 654 /* step 3: recover data indices */ 655 start = f2fs_start_bidx_of_node(ofs_of_node(page), inode); 656 end = start + ADDRS_PER_PAGE(page, inode); 657 658 set_new_dnode(&dn, inode, NULL, NULL, 0); 659 retry_dn: 660 err = f2fs_get_dnode_of_data(&dn, start, ALLOC_NODE); 661 if (err) { 662 if (err == -ENOMEM) { 663 memalloc_retry_wait(GFP_NOFS); 664 goto retry_dn; 665 } 666 goto out; 667 } 668 669 f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true); 670 671 err = f2fs_get_node_info(sbi, dn.nid, &ni, false); 672 if (err) 673 goto err; 674 675 f2fs_bug_on(sbi, ni.ino != ino_of_node(page)); 676 677 if (ofs_of_node(dn.node_page) != ofs_of_node(page)) { 678 f2fs_warn(sbi, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u", 679 inode->i_ino, ofs_of_node(dn.node_page), 680 ofs_of_node(page)); 681 err = -EFSCORRUPTED; 682 f2fs_handle_error(sbi, ERROR_INCONSISTENT_FOOTER); 683 goto err; 684 } 685 686 for (; start < end; start++, dn.ofs_in_node++) { 687 block_t src, dest; 688 689 src = f2fs_data_blkaddr(&dn); 690 dest = data_blkaddr(dn.inode, page, dn.ofs_in_node); 691 692 if (__is_valid_data_blkaddr(src) && 693 !f2fs_is_valid_blkaddr(sbi, src, META_POR)) { 694 err = -EFSCORRUPTED; 695 goto err; 696 } 697 698 if (__is_valid_data_blkaddr(dest) && 699 !f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 700 err = -EFSCORRUPTED; 701 goto err; 702 } 703 704 /* skip recovering if dest is the same as src */ 705 if (src == dest) 706 continue; 707 708 /* dest is invalid, just invalidate src block */ 709 if (dest == NULL_ADDR) { 710 f2fs_truncate_data_blocks_range(&dn, 1); 711 continue; 712 } 713 714 if (!file_keep_isize(inode) && 715 (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT))) 716 f2fs_i_size_write(inode, 717 (loff_t)(start + 1) << PAGE_SHIFT); 718 719 /* 720 * dest is reserved block, invalidate src block 721 * and then reserve one new block in dnode page. 722 */ 723 if (dest == NEW_ADDR) { 724 f2fs_truncate_data_blocks_range(&dn, 1); 725 726 err = f2fs_reserve_new_block_retry(&dn); 727 if (err) 728 goto err; 729 continue; 730 } 731 732 /* dest is valid block, try to recover from src to dest */ 733 if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 734 if (src == NULL_ADDR) { 735 err = f2fs_reserve_new_block_retry(&dn); 736 if (err) 737 goto err; 738 } 739 retry_prev: 740 /* Check the previous node page having this index */ 741 err = check_index_in_prev_nodes(sbi, dest, &dn); 742 if (err) { 743 if (err == -ENOMEM) { 744 memalloc_retry_wait(GFP_NOFS); 745 goto retry_prev; 746 } 747 goto err; 748 } 749 750 if (f2fs_is_valid_blkaddr(sbi, dest, 751 DATA_GENERIC_ENHANCE_UPDATE)) { 752 f2fs_err(sbi, "Inconsistent dest blkaddr:%u, ino:%lu, ofs:%u", 753 dest, inode->i_ino, dn.ofs_in_node); 754 err = -EFSCORRUPTED; 755 goto err; 756 } 757 758 /* write dummy data page */ 759 f2fs_replace_block(sbi, &dn, src, dest, 760 ni.version, false, false); 761 recovered++; 762 } 763 } 764 765 copy_node_footer(dn.node_page, page); 766 fill_node_footer(dn.node_page, dn.nid, ni.ino, 767 ofs_of_node(page), false); 768 set_page_dirty(dn.node_page); 769 err: 770 f2fs_put_dnode(&dn); 771 out: 772 f2fs_notice(sbi, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d", 773 inode->i_ino, file_keep_isize(inode) ? "keep" : "recover", 774 recovered, err); 775 return err; 776 } 777 778 static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list, 779 struct list_head *tmp_inode_list, struct list_head *dir_list) 780 { 781 struct curseg_info *curseg; 782 struct page *page = NULL; 783 int err = 0; 784 block_t blkaddr; 785 unsigned int ra_blocks = RECOVERY_MAX_RA_BLOCKS; 786 787 /* get node pages in the current segment */ 788 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); 789 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); 790 791 while (1) { 792 struct fsync_inode_entry *entry; 793 794 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR)) 795 break; 796 797 page = f2fs_get_tmp_page(sbi, blkaddr); 798 if (IS_ERR(page)) { 799 err = PTR_ERR(page); 800 break; 801 } 802 803 if (!is_recoverable_dnode(page)) { 804 f2fs_put_page(page, 1); 805 break; 806 } 807 808 entry = get_fsync_inode(inode_list, ino_of_node(page)); 809 if (!entry) 810 goto next; 811 /* 812 * inode(x) | CP | inode(x) | dnode(F) 813 * In this case, we can lose the latest inode(x). 814 * So, call recover_inode for the inode update. 815 */ 816 if (IS_INODE(page)) { 817 err = recover_inode(entry->inode, page); 818 if (err) { 819 f2fs_put_page(page, 1); 820 break; 821 } 822 } 823 if (entry->last_dentry == blkaddr) { 824 err = recover_dentry(entry->inode, page, dir_list); 825 if (err) { 826 f2fs_put_page(page, 1); 827 break; 828 } 829 } 830 err = do_recover_data(sbi, entry->inode, page); 831 if (err) { 832 f2fs_put_page(page, 1); 833 break; 834 } 835 836 if (entry->blkaddr == blkaddr) 837 list_move_tail(&entry->list, tmp_inode_list); 838 next: 839 ra_blocks = adjust_por_ra_blocks(sbi, ra_blocks, blkaddr, 840 next_blkaddr_of_node(page)); 841 842 /* check next segment */ 843 blkaddr = next_blkaddr_of_node(page); 844 f2fs_put_page(page, 1); 845 846 f2fs_ra_meta_pages_cond(sbi, blkaddr, ra_blocks); 847 } 848 if (!err) 849 err = f2fs_allocate_new_segments(sbi); 850 return err; 851 } 852 853 int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only) 854 { 855 struct list_head inode_list, tmp_inode_list; 856 struct list_head dir_list; 857 int err; 858 int ret = 0; 859 unsigned long s_flags = sbi->sb->s_flags; 860 bool need_writecp = false; 861 862 if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE)) 863 f2fs_info(sbi, "recover fsync data on readonly fs"); 864 865 INIT_LIST_HEAD(&inode_list); 866 INIT_LIST_HEAD(&tmp_inode_list); 867 INIT_LIST_HEAD(&dir_list); 868 869 /* prevent checkpoint */ 870 f2fs_down_write(&sbi->cp_global_sem); 871 872 /* step #1: find fsynced inode numbers */ 873 err = find_fsync_dnodes(sbi, &inode_list, check_only); 874 if (err || list_empty(&inode_list)) 875 goto skip; 876 877 if (check_only) { 878 ret = 1; 879 goto skip; 880 } 881 882 need_writecp = true; 883 884 /* step #2: recover data */ 885 err = recover_data(sbi, &inode_list, &tmp_inode_list, &dir_list); 886 if (!err) 887 f2fs_bug_on(sbi, !list_empty(&inode_list)); 888 else 889 f2fs_bug_on(sbi, sbi->sb->s_flags & SB_ACTIVE); 890 skip: 891 destroy_fsync_dnodes(&inode_list, err); 892 destroy_fsync_dnodes(&tmp_inode_list, err); 893 894 /* truncate meta pages to be used by the recovery */ 895 truncate_inode_pages_range(META_MAPPING(sbi), 896 (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1); 897 898 if (err) { 899 truncate_inode_pages_final(NODE_MAPPING(sbi)); 900 truncate_inode_pages_final(META_MAPPING(sbi)); 901 } 902 903 /* 904 * If fsync data succeeds or there is no fsync data to recover, 905 * and the f2fs is not read only, check and fix zoned block devices' 906 * write pointer consistency. 907 */ 908 if (f2fs_sb_has_blkzoned(sbi) && !f2fs_readonly(sbi->sb)) { 909 int err2 = f2fs_fix_curseg_write_pointer(sbi); 910 911 if (!err2) 912 err2 = f2fs_check_write_pointer(sbi); 913 if (err2) 914 err = err2; 915 ret = err; 916 } 917 918 if (!err) 919 clear_sbi_flag(sbi, SBI_POR_DOING); 920 921 f2fs_up_write(&sbi->cp_global_sem); 922 923 /* let's drop all the directory inodes for clean checkpoint */ 924 destroy_fsync_dnodes(&dir_list, err); 925 926 if (need_writecp) { 927 set_sbi_flag(sbi, SBI_IS_RECOVERED); 928 929 if (!err) { 930 struct cp_control cpc = { 931 .reason = CP_RECOVERY, 932 }; 933 stat_inc_cp_call_count(sbi, TOTAL_CALL); 934 err = f2fs_write_checkpoint(sbi, &cpc); 935 } 936 } 937 938 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 939 940 return ret ? ret : err; 941 } 942 943 int __init f2fs_create_recovery_cache(void) 944 { 945 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry", 946 sizeof(struct fsync_inode_entry)); 947 return fsync_entry_slab ? 0 : -ENOMEM; 948 } 949 950 void f2fs_destroy_recovery_cache(void) 951 { 952 kmem_cache_destroy(fsync_entry_slab); 953 } 954