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 "f2fs.h" 12 #include "node.h" 13 #include "segment.h" 14 15 /* 16 * Roll forward recovery scenarios. 17 * 18 * [Term] F: fsync_mark, D: dentry_mark 19 * 20 * 1. inode(x) | CP | inode(x) | dnode(F) 21 * -> Update the latest inode(x). 22 * 23 * 2. inode(x) | CP | inode(F) | dnode(F) 24 * -> No problem. 25 * 26 * 3. inode(x) | CP | dnode(F) | inode(x) 27 * -> Recover to the latest dnode(F), and drop the last inode(x) 28 * 29 * 4. inode(x) | CP | dnode(F) | inode(F) 30 * -> No problem. 31 * 32 * 5. CP | inode(x) | dnode(F) 33 * -> The inode(DF) was missing. Should drop this dnode(F). 34 * 35 * 6. CP | inode(DF) | dnode(F) 36 * -> No problem. 37 * 38 * 7. CP | dnode(F) | inode(DF) 39 * -> If f2fs_iget fails, then goto next to find inode(DF). 40 * 41 * 8. CP | dnode(F) | inode(x) 42 * -> If f2fs_iget fails, then goto next to find inode(DF). 43 * But it will fail due to no inode(DF). 44 */ 45 46 static struct kmem_cache *fsync_entry_slab; 47 48 bool f2fs_space_for_roll_forward(struct f2fs_sb_info *sbi) 49 { 50 s64 nalloc = percpu_counter_sum_positive(&sbi->alloc_valid_block_count); 51 52 if (sbi->last_valid_block_count + nalloc > sbi->user_block_count) 53 return false; 54 return true; 55 } 56 57 static struct fsync_inode_entry *get_fsync_inode(struct list_head *head, 58 nid_t ino) 59 { 60 struct fsync_inode_entry *entry; 61 62 list_for_each_entry(entry, head, list) 63 if (entry->inode->i_ino == ino) 64 return entry; 65 66 return NULL; 67 } 68 69 static struct fsync_inode_entry *add_fsync_inode(struct f2fs_sb_info *sbi, 70 struct list_head *head, nid_t ino, bool quota_inode) 71 { 72 struct inode *inode; 73 struct fsync_inode_entry *entry; 74 int err; 75 76 inode = f2fs_iget_retry(sbi->sb, ino); 77 if (IS_ERR(inode)) 78 return ERR_CAST(inode); 79 80 err = dquot_initialize(inode); 81 if (err) 82 goto err_out; 83 84 if (quota_inode) { 85 err = dquot_alloc_inode(inode); 86 if (err) 87 goto err_out; 88 } 89 90 entry = f2fs_kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO); 91 entry->inode = inode; 92 list_add_tail(&entry->list, head); 93 94 return entry; 95 err_out: 96 iput(inode); 97 return ERR_PTR(err); 98 } 99 100 static void del_fsync_inode(struct fsync_inode_entry *entry, int drop) 101 { 102 if (drop) { 103 /* inode should not be recovered, drop it */ 104 f2fs_inode_synced(entry->inode); 105 } 106 iput(entry->inode); 107 list_del(&entry->list); 108 kmem_cache_free(fsync_entry_slab, entry); 109 } 110 111 static int init_recovered_filename(const struct inode *dir, 112 struct f2fs_inode *raw_inode, 113 struct f2fs_filename *fname, 114 struct qstr *usr_fname) 115 { 116 int err; 117 118 memset(fname, 0, sizeof(*fname)); 119 fname->disk_name.len = le32_to_cpu(raw_inode->i_namelen); 120 fname->disk_name.name = raw_inode->i_name; 121 122 if (WARN_ON(fname->disk_name.len > F2FS_NAME_LEN)) 123 return -ENAMETOOLONG; 124 125 if (!IS_ENCRYPTED(dir)) { 126 usr_fname->name = fname->disk_name.name; 127 usr_fname->len = fname->disk_name.len; 128 fname->usr_fname = usr_fname; 129 } 130 131 /* Compute the hash of the filename */ 132 if (IS_ENCRYPTED(dir) && IS_CASEFOLDED(dir)) { 133 /* 134 * In this case the hash isn't computable without the key, so it 135 * was saved on-disk. 136 */ 137 if (fname->disk_name.len + sizeof(f2fs_hash_t) > F2FS_NAME_LEN) 138 return -EINVAL; 139 fname->hash = get_unaligned((f2fs_hash_t *) 140 &raw_inode->i_name[fname->disk_name.len]); 141 } else if (IS_CASEFOLDED(dir)) { 142 err = f2fs_init_casefolded_name(dir, fname); 143 if (err) 144 return err; 145 f2fs_hash_filename(dir, fname); 146 #ifdef CONFIG_UNICODE 147 /* Case-sensitive match is fine for recovery */ 148 kfree(fname->cf_name.name); 149 fname->cf_name.name = NULL; 150 #endif 151 } else { 152 f2fs_hash_filename(dir, fname); 153 } 154 return 0; 155 } 156 157 static int recover_dentry(struct inode *inode, struct page *ipage, 158 struct list_head *dir_list) 159 { 160 struct f2fs_inode *raw_inode = F2FS_INODE(ipage); 161 nid_t pino = le32_to_cpu(raw_inode->i_pino); 162 struct f2fs_dir_entry *de; 163 struct f2fs_filename fname; 164 struct qstr usr_fname; 165 struct page *page; 166 struct inode *dir, *einode; 167 struct fsync_inode_entry *entry; 168 int err = 0; 169 char *name; 170 171 entry = get_fsync_inode(dir_list, pino); 172 if (!entry) { 173 entry = add_fsync_inode(F2FS_I_SB(inode), dir_list, 174 pino, false); 175 if (IS_ERR(entry)) { 176 dir = ERR_CAST(entry); 177 err = PTR_ERR(entry); 178 goto out; 179 } 180 } 181 182 dir = entry->inode; 183 err = init_recovered_filename(dir, raw_inode, &fname, &usr_fname); 184 if (err) 185 goto out; 186 retry: 187 de = __f2fs_find_entry(dir, &fname, &page); 188 if (de && inode->i_ino == le32_to_cpu(de->ino)) 189 goto out_put; 190 191 if (de) { 192 einode = f2fs_iget_retry(inode->i_sb, le32_to_cpu(de->ino)); 193 if (IS_ERR(einode)) { 194 WARN_ON(1); 195 err = PTR_ERR(einode); 196 if (err == -ENOENT) 197 err = -EEXIST; 198 goto out_put; 199 } 200 201 err = dquot_initialize(einode); 202 if (err) { 203 iput(einode); 204 goto out_put; 205 } 206 207 err = f2fs_acquire_orphan_inode(F2FS_I_SB(inode)); 208 if (err) { 209 iput(einode); 210 goto out_put; 211 } 212 f2fs_delete_entry(de, page, dir, einode); 213 iput(einode); 214 goto retry; 215 } else if (IS_ERR(page)) { 216 err = PTR_ERR(page); 217 } else { 218 err = f2fs_add_dentry(dir, &fname, inode, 219 inode->i_ino, inode->i_mode); 220 } 221 if (err == -ENOMEM) 222 goto retry; 223 goto out; 224 225 out_put: 226 f2fs_put_page(page, 0); 227 out: 228 if (file_enc_name(inode)) 229 name = "<encrypted>"; 230 else 231 name = raw_inode->i_name; 232 f2fs_notice(F2FS_I_SB(inode), "%s: ino = %x, name = %s, dir = %lx, err = %d", 233 __func__, ino_of_node(ipage), name, 234 IS_ERR(dir) ? 0 : dir->i_ino, err); 235 return err; 236 } 237 238 static int recover_quota_data(struct inode *inode, struct page *page) 239 { 240 struct f2fs_inode *raw = F2FS_INODE(page); 241 struct iattr attr; 242 uid_t i_uid = le32_to_cpu(raw->i_uid); 243 gid_t i_gid = le32_to_cpu(raw->i_gid); 244 int err; 245 246 memset(&attr, 0, sizeof(attr)); 247 248 attr.ia_uid = make_kuid(inode->i_sb->s_user_ns, i_uid); 249 attr.ia_gid = make_kgid(inode->i_sb->s_user_ns, i_gid); 250 251 if (!uid_eq(attr.ia_uid, inode->i_uid)) 252 attr.ia_valid |= ATTR_UID; 253 if (!gid_eq(attr.ia_gid, inode->i_gid)) 254 attr.ia_valid |= ATTR_GID; 255 256 if (!attr.ia_valid) 257 return 0; 258 259 err = dquot_transfer(inode, &attr); 260 if (err) 261 set_sbi_flag(F2FS_I_SB(inode), SBI_QUOTA_NEED_REPAIR); 262 return err; 263 } 264 265 static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri) 266 { 267 if (ri->i_inline & F2FS_PIN_FILE) 268 set_inode_flag(inode, FI_PIN_FILE); 269 else 270 clear_inode_flag(inode, FI_PIN_FILE); 271 if (ri->i_inline & F2FS_DATA_EXIST) 272 set_inode_flag(inode, FI_DATA_EXIST); 273 else 274 clear_inode_flag(inode, FI_DATA_EXIST); 275 } 276 277 static int recover_inode(struct inode *inode, struct page *page) 278 { 279 struct f2fs_inode *raw = F2FS_INODE(page); 280 char *name; 281 int err; 282 283 inode->i_mode = le16_to_cpu(raw->i_mode); 284 285 err = recover_quota_data(inode, page); 286 if (err) 287 return err; 288 289 i_uid_write(inode, le32_to_cpu(raw->i_uid)); 290 i_gid_write(inode, le32_to_cpu(raw->i_gid)); 291 292 if (raw->i_inline & F2FS_EXTRA_ATTR) { 293 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)) && 294 F2FS_FITS_IN_INODE(raw, le16_to_cpu(raw->i_extra_isize), 295 i_projid)) { 296 projid_t i_projid; 297 kprojid_t kprojid; 298 299 i_projid = (projid_t)le32_to_cpu(raw->i_projid); 300 kprojid = make_kprojid(&init_user_ns, i_projid); 301 302 if (!projid_eq(kprojid, F2FS_I(inode)->i_projid)) { 303 err = f2fs_transfer_project_quota(inode, 304 kprojid); 305 if (err) 306 return err; 307 F2FS_I(inode)->i_projid = kprojid; 308 } 309 } 310 } 311 312 f2fs_i_size_write(inode, le64_to_cpu(raw->i_size)); 313 inode->i_atime.tv_sec = le64_to_cpu(raw->i_atime); 314 inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime); 315 inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime); 316 inode->i_atime.tv_nsec = le32_to_cpu(raw->i_atime_nsec); 317 inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec); 318 inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec); 319 320 F2FS_I(inode)->i_advise = raw->i_advise; 321 F2FS_I(inode)->i_flags = le32_to_cpu(raw->i_flags); 322 f2fs_set_inode_flags(inode); 323 F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN] = 324 le16_to_cpu(raw->i_gc_failures); 325 326 recover_inline_flags(inode, raw); 327 328 f2fs_mark_inode_dirty_sync(inode, true); 329 330 if (file_enc_name(inode)) 331 name = "<encrypted>"; 332 else 333 name = F2FS_INODE(page)->i_name; 334 335 f2fs_notice(F2FS_I_SB(inode), "recover_inode: ino = %x, name = %s, inline = %x", 336 ino_of_node(page), name, raw->i_inline); 337 return 0; 338 } 339 340 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head, 341 bool check_only) 342 { 343 struct curseg_info *curseg; 344 struct page *page = NULL; 345 block_t blkaddr; 346 unsigned int loop_cnt = 0; 347 unsigned int free_blocks = MAIN_SEGS(sbi) * sbi->blocks_per_seg - 348 valid_user_blocks(sbi); 349 int err = 0; 350 351 /* get node pages in the current segment */ 352 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); 353 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); 354 355 while (1) { 356 struct fsync_inode_entry *entry; 357 358 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR)) 359 return 0; 360 361 page = f2fs_get_tmp_page(sbi, blkaddr); 362 if (IS_ERR(page)) { 363 err = PTR_ERR(page); 364 break; 365 } 366 367 if (!is_recoverable_dnode(page)) { 368 f2fs_put_page(page, 1); 369 break; 370 } 371 372 if (!is_fsync_dnode(page)) 373 goto next; 374 375 entry = get_fsync_inode(head, ino_of_node(page)); 376 if (!entry) { 377 bool quota_inode = false; 378 379 if (!check_only && 380 IS_INODE(page) && is_dent_dnode(page)) { 381 err = f2fs_recover_inode_page(sbi, page); 382 if (err) { 383 f2fs_put_page(page, 1); 384 break; 385 } 386 quota_inode = true; 387 } 388 389 /* 390 * CP | dnode(F) | inode(DF) 391 * For this case, we should not give up now. 392 */ 393 entry = add_fsync_inode(sbi, head, ino_of_node(page), 394 quota_inode); 395 if (IS_ERR(entry)) { 396 err = PTR_ERR(entry); 397 if (err == -ENOENT) { 398 err = 0; 399 goto next; 400 } 401 f2fs_put_page(page, 1); 402 break; 403 } 404 } 405 entry->blkaddr = blkaddr; 406 407 if (IS_INODE(page) && is_dent_dnode(page)) 408 entry->last_dentry = blkaddr; 409 next: 410 /* sanity check in order to detect looped node chain */ 411 if (++loop_cnt >= free_blocks || 412 blkaddr == next_blkaddr_of_node(page)) { 413 f2fs_notice(sbi, "%s: detect looped node chain, blkaddr:%u, next:%u", 414 __func__, blkaddr, 415 next_blkaddr_of_node(page)); 416 f2fs_put_page(page, 1); 417 err = -EINVAL; 418 break; 419 } 420 421 /* check next segment */ 422 blkaddr = next_blkaddr_of_node(page); 423 f2fs_put_page(page, 1); 424 425 f2fs_ra_meta_pages_cond(sbi, blkaddr); 426 } 427 return err; 428 } 429 430 static void destroy_fsync_dnodes(struct list_head *head, int drop) 431 { 432 struct fsync_inode_entry *entry, *tmp; 433 434 list_for_each_entry_safe(entry, tmp, head, list) 435 del_fsync_inode(entry, drop); 436 } 437 438 static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi, 439 block_t blkaddr, struct dnode_of_data *dn) 440 { 441 struct seg_entry *sentry; 442 unsigned int segno = GET_SEGNO(sbi, blkaddr); 443 unsigned short blkoff = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); 444 struct f2fs_summary_block *sum_node; 445 struct f2fs_summary sum; 446 struct page *sum_page, *node_page; 447 struct dnode_of_data tdn = *dn; 448 nid_t ino, nid; 449 struct inode *inode; 450 unsigned int offset; 451 block_t bidx; 452 int i; 453 454 sentry = get_seg_entry(sbi, segno); 455 if (!f2fs_test_bit(blkoff, sentry->cur_valid_map)) 456 return 0; 457 458 /* Get the previous summary */ 459 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { 460 struct curseg_info *curseg = CURSEG_I(sbi, i); 461 if (curseg->segno == segno) { 462 sum = curseg->sum_blk->entries[blkoff]; 463 goto got_it; 464 } 465 } 466 467 sum_page = f2fs_get_sum_page(sbi, segno); 468 if (IS_ERR(sum_page)) 469 return PTR_ERR(sum_page); 470 sum_node = (struct f2fs_summary_block *)page_address(sum_page); 471 sum = sum_node->entries[blkoff]; 472 f2fs_put_page(sum_page, 1); 473 got_it: 474 /* Use the locked dnode page and inode */ 475 nid = le32_to_cpu(sum.nid); 476 if (dn->inode->i_ino == nid) { 477 tdn.nid = nid; 478 if (!dn->inode_page_locked) 479 lock_page(dn->inode_page); 480 tdn.node_page = dn->inode_page; 481 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node); 482 goto truncate_out; 483 } else if (dn->nid == nid) { 484 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node); 485 goto truncate_out; 486 } 487 488 /* Get the node page */ 489 node_page = f2fs_get_node_page(sbi, nid); 490 if (IS_ERR(node_page)) 491 return PTR_ERR(node_page); 492 493 offset = ofs_of_node(node_page); 494 ino = ino_of_node(node_page); 495 f2fs_put_page(node_page, 1); 496 497 if (ino != dn->inode->i_ino) { 498 int ret; 499 500 /* Deallocate previous index in the node page */ 501 inode = f2fs_iget_retry(sbi->sb, ino); 502 if (IS_ERR(inode)) 503 return PTR_ERR(inode); 504 505 ret = dquot_initialize(inode); 506 if (ret) { 507 iput(inode); 508 return ret; 509 } 510 } else { 511 inode = dn->inode; 512 } 513 514 bidx = f2fs_start_bidx_of_node(offset, inode) + 515 le16_to_cpu(sum.ofs_in_node); 516 517 /* 518 * if inode page is locked, unlock temporarily, but its reference 519 * count keeps alive. 520 */ 521 if (ino == dn->inode->i_ino && dn->inode_page_locked) 522 unlock_page(dn->inode_page); 523 524 set_new_dnode(&tdn, inode, NULL, NULL, 0); 525 if (f2fs_get_dnode_of_data(&tdn, bidx, LOOKUP_NODE)) 526 goto out; 527 528 if (tdn.data_blkaddr == blkaddr) 529 f2fs_truncate_data_blocks_range(&tdn, 1); 530 531 f2fs_put_dnode(&tdn); 532 out: 533 if (ino != dn->inode->i_ino) 534 iput(inode); 535 else if (dn->inode_page_locked) 536 lock_page(dn->inode_page); 537 return 0; 538 539 truncate_out: 540 if (f2fs_data_blkaddr(&tdn) == blkaddr) 541 f2fs_truncate_data_blocks_range(&tdn, 1); 542 if (dn->inode->i_ino == nid && !dn->inode_page_locked) 543 unlock_page(dn->inode_page); 544 return 0; 545 } 546 547 static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode, 548 struct page *page) 549 { 550 struct dnode_of_data dn; 551 struct node_info ni; 552 unsigned int start, end; 553 int err = 0, recovered = 0; 554 555 /* step 1: recover xattr */ 556 if (IS_INODE(page)) { 557 err = f2fs_recover_inline_xattr(inode, page); 558 if (err) 559 goto out; 560 } else if (f2fs_has_xattr_block(ofs_of_node(page))) { 561 err = f2fs_recover_xattr_data(inode, page); 562 if (!err) 563 recovered++; 564 goto out; 565 } 566 567 /* step 2: recover inline data */ 568 err = f2fs_recover_inline_data(inode, page); 569 if (err) { 570 if (err == 1) 571 err = 0; 572 goto out; 573 } 574 575 /* step 3: recover data indices */ 576 start = f2fs_start_bidx_of_node(ofs_of_node(page), inode); 577 end = start + ADDRS_PER_PAGE(page, inode); 578 579 set_new_dnode(&dn, inode, NULL, NULL, 0); 580 retry_dn: 581 err = f2fs_get_dnode_of_data(&dn, start, ALLOC_NODE); 582 if (err) { 583 if (err == -ENOMEM) { 584 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT); 585 goto retry_dn; 586 } 587 goto out; 588 } 589 590 f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true); 591 592 err = f2fs_get_node_info(sbi, dn.nid, &ni); 593 if (err) 594 goto err; 595 596 f2fs_bug_on(sbi, ni.ino != ino_of_node(page)); 597 598 if (ofs_of_node(dn.node_page) != ofs_of_node(page)) { 599 f2fs_warn(sbi, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u", 600 inode->i_ino, ofs_of_node(dn.node_page), 601 ofs_of_node(page)); 602 err = -EFSCORRUPTED; 603 goto err; 604 } 605 606 for (; start < end; start++, dn.ofs_in_node++) { 607 block_t src, dest; 608 609 src = f2fs_data_blkaddr(&dn); 610 dest = data_blkaddr(dn.inode, page, dn.ofs_in_node); 611 612 if (__is_valid_data_blkaddr(src) && 613 !f2fs_is_valid_blkaddr(sbi, src, META_POR)) { 614 err = -EFSCORRUPTED; 615 goto err; 616 } 617 618 if (__is_valid_data_blkaddr(dest) && 619 !f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 620 err = -EFSCORRUPTED; 621 goto err; 622 } 623 624 /* skip recovering if dest is the same as src */ 625 if (src == dest) 626 continue; 627 628 /* dest is invalid, just invalidate src block */ 629 if (dest == NULL_ADDR) { 630 f2fs_truncate_data_blocks_range(&dn, 1); 631 continue; 632 } 633 634 if (!file_keep_isize(inode) && 635 (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT))) 636 f2fs_i_size_write(inode, 637 (loff_t)(start + 1) << PAGE_SHIFT); 638 639 /* 640 * dest is reserved block, invalidate src block 641 * and then reserve one new block in dnode page. 642 */ 643 if (dest == NEW_ADDR) { 644 f2fs_truncate_data_blocks_range(&dn, 1); 645 f2fs_reserve_new_block(&dn); 646 continue; 647 } 648 649 /* dest is valid block, try to recover from src to dest */ 650 if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 651 652 if (src == NULL_ADDR) { 653 err = f2fs_reserve_new_block(&dn); 654 while (err && 655 IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) 656 err = f2fs_reserve_new_block(&dn); 657 /* We should not get -ENOSPC */ 658 f2fs_bug_on(sbi, err); 659 if (err) 660 goto err; 661 } 662 retry_prev: 663 /* Check the previous node page having this index */ 664 err = check_index_in_prev_nodes(sbi, dest, &dn); 665 if (err) { 666 if (err == -ENOMEM) { 667 congestion_wait(BLK_RW_ASYNC, 668 DEFAULT_IO_TIMEOUT); 669 goto retry_prev; 670 } 671 goto err; 672 } 673 674 /* write dummy data page */ 675 f2fs_replace_block(sbi, &dn, src, dest, 676 ni.version, false, false); 677 recovered++; 678 } 679 } 680 681 copy_node_footer(dn.node_page, page); 682 fill_node_footer(dn.node_page, dn.nid, ni.ino, 683 ofs_of_node(page), false); 684 set_page_dirty(dn.node_page); 685 err: 686 f2fs_put_dnode(&dn); 687 out: 688 f2fs_notice(sbi, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d", 689 inode->i_ino, file_keep_isize(inode) ? "keep" : "recover", 690 recovered, err); 691 return err; 692 } 693 694 static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list, 695 struct list_head *tmp_inode_list, struct list_head *dir_list) 696 { 697 struct curseg_info *curseg; 698 struct page *page = NULL; 699 int err = 0; 700 block_t blkaddr; 701 702 /* get node pages in the current segment */ 703 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); 704 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); 705 706 while (1) { 707 struct fsync_inode_entry *entry; 708 709 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR)) 710 break; 711 712 f2fs_ra_meta_pages_cond(sbi, blkaddr); 713 714 page = f2fs_get_tmp_page(sbi, blkaddr); 715 if (IS_ERR(page)) { 716 err = PTR_ERR(page); 717 break; 718 } 719 720 if (!is_recoverable_dnode(page)) { 721 f2fs_put_page(page, 1); 722 break; 723 } 724 725 entry = get_fsync_inode(inode_list, ino_of_node(page)); 726 if (!entry) 727 goto next; 728 /* 729 * inode(x) | CP | inode(x) | dnode(F) 730 * In this case, we can lose the latest inode(x). 731 * So, call recover_inode for the inode update. 732 */ 733 if (IS_INODE(page)) { 734 err = recover_inode(entry->inode, page); 735 if (err) { 736 f2fs_put_page(page, 1); 737 break; 738 } 739 } 740 if (entry->last_dentry == blkaddr) { 741 err = recover_dentry(entry->inode, page, dir_list); 742 if (err) { 743 f2fs_put_page(page, 1); 744 break; 745 } 746 } 747 err = do_recover_data(sbi, entry->inode, page); 748 if (err) { 749 f2fs_put_page(page, 1); 750 break; 751 } 752 753 if (entry->blkaddr == blkaddr) 754 list_move_tail(&entry->list, tmp_inode_list); 755 next: 756 /* check next segment */ 757 blkaddr = next_blkaddr_of_node(page); 758 f2fs_put_page(page, 1); 759 } 760 if (!err) 761 f2fs_allocate_new_segments(sbi); 762 return err; 763 } 764 765 int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only) 766 { 767 struct list_head inode_list, tmp_inode_list; 768 struct list_head dir_list; 769 int err; 770 int ret = 0; 771 unsigned long s_flags = sbi->sb->s_flags; 772 bool need_writecp = false; 773 bool fix_curseg_write_pointer = false; 774 #ifdef CONFIG_QUOTA 775 int quota_enabled; 776 #endif 777 778 if (s_flags & SB_RDONLY) { 779 f2fs_info(sbi, "recover fsync data on readonly fs"); 780 sbi->sb->s_flags &= ~SB_RDONLY; 781 } 782 783 #ifdef CONFIG_QUOTA 784 /* Needed for iput() to work correctly and not trash data */ 785 sbi->sb->s_flags |= SB_ACTIVE; 786 /* Turn on quotas so that they are updated correctly */ 787 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY); 788 #endif 789 790 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry", 791 sizeof(struct fsync_inode_entry)); 792 if (!fsync_entry_slab) { 793 err = -ENOMEM; 794 goto out; 795 } 796 797 INIT_LIST_HEAD(&inode_list); 798 INIT_LIST_HEAD(&tmp_inode_list); 799 INIT_LIST_HEAD(&dir_list); 800 801 /* prevent checkpoint */ 802 down_write(&sbi->cp_global_sem); 803 804 /* step #1: find fsynced inode numbers */ 805 err = find_fsync_dnodes(sbi, &inode_list, check_only); 806 if (err || list_empty(&inode_list)) 807 goto skip; 808 809 if (check_only) { 810 ret = 1; 811 goto skip; 812 } 813 814 need_writecp = true; 815 816 /* step #2: recover data */ 817 err = recover_data(sbi, &inode_list, &tmp_inode_list, &dir_list); 818 if (!err) 819 f2fs_bug_on(sbi, !list_empty(&inode_list)); 820 else { 821 /* restore s_flags to let iput() trash data */ 822 sbi->sb->s_flags = s_flags; 823 } 824 skip: 825 fix_curseg_write_pointer = !check_only || list_empty(&inode_list); 826 827 destroy_fsync_dnodes(&inode_list, err); 828 destroy_fsync_dnodes(&tmp_inode_list, err); 829 830 /* truncate meta pages to be used by the recovery */ 831 truncate_inode_pages_range(META_MAPPING(sbi), 832 (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1); 833 834 if (err) { 835 truncate_inode_pages_final(NODE_MAPPING(sbi)); 836 truncate_inode_pages_final(META_MAPPING(sbi)); 837 } 838 839 /* 840 * If fsync data succeeds or there is no fsync data to recover, 841 * and the f2fs is not read only, check and fix zoned block devices' 842 * write pointer consistency. 843 */ 844 if (!err && fix_curseg_write_pointer && !f2fs_readonly(sbi->sb) && 845 f2fs_sb_has_blkzoned(sbi)) { 846 err = f2fs_fix_curseg_write_pointer(sbi); 847 ret = err; 848 } 849 850 if (!err) 851 clear_sbi_flag(sbi, SBI_POR_DOING); 852 853 up_write(&sbi->cp_global_sem); 854 855 /* let's drop all the directory inodes for clean checkpoint */ 856 destroy_fsync_dnodes(&dir_list, err); 857 858 if (need_writecp) { 859 set_sbi_flag(sbi, SBI_IS_RECOVERED); 860 861 if (!err) { 862 struct cp_control cpc = { 863 .reason = CP_RECOVERY, 864 }; 865 err = f2fs_write_checkpoint(sbi, &cpc); 866 } 867 } 868 869 kmem_cache_destroy(fsync_entry_slab); 870 out: 871 #ifdef CONFIG_QUOTA 872 /* Turn quotas off */ 873 if (quota_enabled) 874 f2fs_quota_off_umount(sbi->sb); 875 #endif 876 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 877 878 return ret ? ret: err; 879 } 880