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 #ifdef CONFIG_UNICODE 49 extern struct kmem_cache *f2fs_cf_name_slab; 50 #endif 51 52 bool f2fs_space_for_roll_forward(struct f2fs_sb_info *sbi) 53 { 54 s64 nalloc = percpu_counter_sum_positive(&sbi->alloc_valid_block_count); 55 56 if (sbi->last_valid_block_count + nalloc > sbi->user_block_count) 57 return false; 58 return true; 59 } 60 61 static struct fsync_inode_entry *get_fsync_inode(struct list_head *head, 62 nid_t ino) 63 { 64 struct fsync_inode_entry *entry; 65 66 list_for_each_entry(entry, head, list) 67 if (entry->inode->i_ino == ino) 68 return entry; 69 70 return NULL; 71 } 72 73 static struct fsync_inode_entry *add_fsync_inode(struct f2fs_sb_info *sbi, 74 struct list_head *head, nid_t ino, bool quota_inode) 75 { 76 struct inode *inode; 77 struct fsync_inode_entry *entry; 78 int err; 79 80 inode = f2fs_iget_retry(sbi->sb, ino); 81 if (IS_ERR(inode)) 82 return ERR_CAST(inode); 83 84 err = dquot_initialize(inode); 85 if (err) 86 goto err_out; 87 88 if (quota_inode) { 89 err = dquot_alloc_inode(inode); 90 if (err) 91 goto err_out; 92 } 93 94 entry = f2fs_kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO); 95 entry->inode = inode; 96 list_add_tail(&entry->list, head); 97 98 return entry; 99 err_out: 100 iput(inode); 101 return ERR_PTR(err); 102 } 103 104 static void del_fsync_inode(struct fsync_inode_entry *entry, int drop) 105 { 106 if (drop) { 107 /* inode should not be recovered, drop it */ 108 f2fs_inode_synced(entry->inode); 109 } 110 iput(entry->inode); 111 list_del(&entry->list); 112 kmem_cache_free(fsync_entry_slab, entry); 113 } 114 115 static int init_recovered_filename(const struct inode *dir, 116 struct f2fs_inode *raw_inode, 117 struct f2fs_filename *fname, 118 struct qstr *usr_fname) 119 { 120 int err; 121 122 memset(fname, 0, sizeof(*fname)); 123 fname->disk_name.len = le32_to_cpu(raw_inode->i_namelen); 124 fname->disk_name.name = raw_inode->i_name; 125 126 if (WARN_ON(fname->disk_name.len > F2FS_NAME_LEN)) 127 return -ENAMETOOLONG; 128 129 if (!IS_ENCRYPTED(dir)) { 130 usr_fname->name = fname->disk_name.name; 131 usr_fname->len = fname->disk_name.len; 132 fname->usr_fname = usr_fname; 133 } 134 135 /* Compute the hash of the filename */ 136 if (IS_ENCRYPTED(dir) && IS_CASEFOLDED(dir)) { 137 /* 138 * In this case the hash isn't computable without the key, so it 139 * was saved on-disk. 140 */ 141 if (fname->disk_name.len + sizeof(f2fs_hash_t) > F2FS_NAME_LEN) 142 return -EINVAL; 143 fname->hash = get_unaligned((f2fs_hash_t *) 144 &raw_inode->i_name[fname->disk_name.len]); 145 } else if (IS_CASEFOLDED(dir)) { 146 err = f2fs_init_casefolded_name(dir, fname); 147 if (err) 148 return err; 149 f2fs_hash_filename(dir, fname); 150 #ifdef CONFIG_UNICODE 151 /* Case-sensitive match is fine for recovery */ 152 kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name); 153 fname->cf_name.name = NULL; 154 #endif 155 } else { 156 f2fs_hash_filename(dir, fname); 157 } 158 return 0; 159 } 160 161 static int recover_dentry(struct inode *inode, struct page *ipage, 162 struct list_head *dir_list) 163 { 164 struct f2fs_inode *raw_inode = F2FS_INODE(ipage); 165 nid_t pino = le32_to_cpu(raw_inode->i_pino); 166 struct f2fs_dir_entry *de; 167 struct f2fs_filename fname; 168 struct qstr usr_fname; 169 struct page *page; 170 struct inode *dir, *einode; 171 struct fsync_inode_entry *entry; 172 int err = 0; 173 char *name; 174 175 entry = get_fsync_inode(dir_list, pino); 176 if (!entry) { 177 entry = add_fsync_inode(F2FS_I_SB(inode), dir_list, 178 pino, false); 179 if (IS_ERR(entry)) { 180 dir = ERR_CAST(entry); 181 err = PTR_ERR(entry); 182 goto out; 183 } 184 } 185 186 dir = entry->inode; 187 err = init_recovered_filename(dir, raw_inode, &fname, &usr_fname); 188 if (err) 189 goto out; 190 retry: 191 de = __f2fs_find_entry(dir, &fname, &page); 192 if (de && inode->i_ino == le32_to_cpu(de->ino)) 193 goto out_put; 194 195 if (de) { 196 einode = f2fs_iget_retry(inode->i_sb, le32_to_cpu(de->ino)); 197 if (IS_ERR(einode)) { 198 WARN_ON(1); 199 err = PTR_ERR(einode); 200 if (err == -ENOENT) 201 err = -EEXIST; 202 goto out_put; 203 } 204 205 err = dquot_initialize(einode); 206 if (err) { 207 iput(einode); 208 goto out_put; 209 } 210 211 err = f2fs_acquire_orphan_inode(F2FS_I_SB(inode)); 212 if (err) { 213 iput(einode); 214 goto out_put; 215 } 216 f2fs_delete_entry(de, page, dir, einode); 217 iput(einode); 218 goto retry; 219 } else if (IS_ERR(page)) { 220 err = PTR_ERR(page); 221 } else { 222 err = f2fs_add_dentry(dir, &fname, inode, 223 inode->i_ino, inode->i_mode); 224 } 225 if (err == -ENOMEM) 226 goto retry; 227 goto out; 228 229 out_put: 230 f2fs_put_page(page, 0); 231 out: 232 if (file_enc_name(inode)) 233 name = "<encrypted>"; 234 else 235 name = raw_inode->i_name; 236 f2fs_notice(F2FS_I_SB(inode), "%s: ino = %x, name = %s, dir = %lx, err = %d", 237 __func__, ino_of_node(ipage), name, 238 IS_ERR(dir) ? 0 : dir->i_ino, err); 239 return err; 240 } 241 242 static int recover_quota_data(struct inode *inode, struct page *page) 243 { 244 struct f2fs_inode *raw = F2FS_INODE(page); 245 struct iattr attr; 246 uid_t i_uid = le32_to_cpu(raw->i_uid); 247 gid_t i_gid = le32_to_cpu(raw->i_gid); 248 int err; 249 250 memset(&attr, 0, sizeof(attr)); 251 252 attr.ia_uid = make_kuid(inode->i_sb->s_user_ns, i_uid); 253 attr.ia_gid = make_kgid(inode->i_sb->s_user_ns, i_gid); 254 255 if (!uid_eq(attr.ia_uid, inode->i_uid)) 256 attr.ia_valid |= ATTR_UID; 257 if (!gid_eq(attr.ia_gid, inode->i_gid)) 258 attr.ia_valid |= ATTR_GID; 259 260 if (!attr.ia_valid) 261 return 0; 262 263 err = dquot_transfer(inode, &attr); 264 if (err) 265 set_sbi_flag(F2FS_I_SB(inode), SBI_QUOTA_NEED_REPAIR); 266 return err; 267 } 268 269 static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri) 270 { 271 if (ri->i_inline & F2FS_PIN_FILE) 272 set_inode_flag(inode, FI_PIN_FILE); 273 else 274 clear_inode_flag(inode, FI_PIN_FILE); 275 if (ri->i_inline & F2FS_DATA_EXIST) 276 set_inode_flag(inode, FI_DATA_EXIST); 277 else 278 clear_inode_flag(inode, FI_DATA_EXIST); 279 } 280 281 static int recover_inode(struct inode *inode, struct page *page) 282 { 283 struct f2fs_inode *raw = F2FS_INODE(page); 284 char *name; 285 int err; 286 287 inode->i_mode = le16_to_cpu(raw->i_mode); 288 289 err = recover_quota_data(inode, page); 290 if (err) 291 return err; 292 293 i_uid_write(inode, le32_to_cpu(raw->i_uid)); 294 i_gid_write(inode, le32_to_cpu(raw->i_gid)); 295 296 if (raw->i_inline & F2FS_EXTRA_ATTR) { 297 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)) && 298 F2FS_FITS_IN_INODE(raw, le16_to_cpu(raw->i_extra_isize), 299 i_projid)) { 300 projid_t i_projid; 301 kprojid_t kprojid; 302 303 i_projid = (projid_t)le32_to_cpu(raw->i_projid); 304 kprojid = make_kprojid(&init_user_ns, i_projid); 305 306 if (!projid_eq(kprojid, F2FS_I(inode)->i_projid)) { 307 err = f2fs_transfer_project_quota(inode, 308 kprojid); 309 if (err) 310 return err; 311 F2FS_I(inode)->i_projid = kprojid; 312 } 313 } 314 } 315 316 f2fs_i_size_write(inode, le64_to_cpu(raw->i_size)); 317 inode->i_atime.tv_sec = le64_to_cpu(raw->i_atime); 318 inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime); 319 inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime); 320 inode->i_atime.tv_nsec = le32_to_cpu(raw->i_atime_nsec); 321 inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec); 322 inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec); 323 324 F2FS_I(inode)->i_advise = raw->i_advise; 325 F2FS_I(inode)->i_flags = le32_to_cpu(raw->i_flags); 326 f2fs_set_inode_flags(inode); 327 F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN] = 328 le16_to_cpu(raw->i_gc_failures); 329 330 recover_inline_flags(inode, raw); 331 332 f2fs_mark_inode_dirty_sync(inode, true); 333 334 if (file_enc_name(inode)) 335 name = "<encrypted>"; 336 else 337 name = F2FS_INODE(page)->i_name; 338 339 f2fs_notice(F2FS_I_SB(inode), "recover_inode: ino = %x, name = %s, inline = %x", 340 ino_of_node(page), name, raw->i_inline); 341 return 0; 342 } 343 344 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head, 345 bool check_only) 346 { 347 struct curseg_info *curseg; 348 struct page *page = NULL; 349 block_t blkaddr; 350 unsigned int loop_cnt = 0; 351 unsigned int free_blocks = MAIN_SEGS(sbi) * sbi->blocks_per_seg - 352 valid_user_blocks(sbi); 353 int err = 0; 354 355 /* get node pages in the current segment */ 356 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); 357 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); 358 359 while (1) { 360 struct fsync_inode_entry *entry; 361 362 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR)) 363 return 0; 364 365 page = f2fs_get_tmp_page(sbi, blkaddr); 366 if (IS_ERR(page)) { 367 err = PTR_ERR(page); 368 break; 369 } 370 371 if (!is_recoverable_dnode(page)) { 372 f2fs_put_page(page, 1); 373 break; 374 } 375 376 if (!is_fsync_dnode(page)) 377 goto next; 378 379 entry = get_fsync_inode(head, ino_of_node(page)); 380 if (!entry) { 381 bool quota_inode = false; 382 383 if (!check_only && 384 IS_INODE(page) && is_dent_dnode(page)) { 385 err = f2fs_recover_inode_page(sbi, page); 386 if (err) { 387 f2fs_put_page(page, 1); 388 break; 389 } 390 quota_inode = true; 391 } 392 393 /* 394 * CP | dnode(F) | inode(DF) 395 * For this case, we should not give up now. 396 */ 397 entry = add_fsync_inode(sbi, head, ino_of_node(page), 398 quota_inode); 399 if (IS_ERR(entry)) { 400 err = PTR_ERR(entry); 401 if (err == -ENOENT) { 402 err = 0; 403 goto next; 404 } 405 f2fs_put_page(page, 1); 406 break; 407 } 408 } 409 entry->blkaddr = blkaddr; 410 411 if (IS_INODE(page) && is_dent_dnode(page)) 412 entry->last_dentry = blkaddr; 413 next: 414 /* sanity check in order to detect looped node chain */ 415 if (++loop_cnt >= free_blocks || 416 blkaddr == next_blkaddr_of_node(page)) { 417 f2fs_notice(sbi, "%s: detect looped node chain, blkaddr:%u, next:%u", 418 __func__, blkaddr, 419 next_blkaddr_of_node(page)); 420 f2fs_put_page(page, 1); 421 err = -EINVAL; 422 break; 423 } 424 425 /* check next segment */ 426 blkaddr = next_blkaddr_of_node(page); 427 f2fs_put_page(page, 1); 428 429 f2fs_ra_meta_pages_cond(sbi, blkaddr); 430 } 431 return err; 432 } 433 434 static void destroy_fsync_dnodes(struct list_head *head, int drop) 435 { 436 struct fsync_inode_entry *entry, *tmp; 437 438 list_for_each_entry_safe(entry, tmp, head, list) 439 del_fsync_inode(entry, drop); 440 } 441 442 static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi, 443 block_t blkaddr, struct dnode_of_data *dn) 444 { 445 struct seg_entry *sentry; 446 unsigned int segno = GET_SEGNO(sbi, blkaddr); 447 unsigned short blkoff = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); 448 struct f2fs_summary_block *sum_node; 449 struct f2fs_summary sum; 450 struct page *sum_page, *node_page; 451 struct dnode_of_data tdn = *dn; 452 nid_t ino, nid; 453 struct inode *inode; 454 unsigned int offset; 455 block_t bidx; 456 int i; 457 458 sentry = get_seg_entry(sbi, segno); 459 if (!f2fs_test_bit(blkoff, sentry->cur_valid_map)) 460 return 0; 461 462 /* Get the previous summary */ 463 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { 464 struct curseg_info *curseg = CURSEG_I(sbi, i); 465 466 if (curseg->segno == segno) { 467 sum = curseg->sum_blk->entries[blkoff]; 468 goto got_it; 469 } 470 } 471 472 sum_page = f2fs_get_sum_page(sbi, segno); 473 if (IS_ERR(sum_page)) 474 return PTR_ERR(sum_page); 475 sum_node = (struct f2fs_summary_block *)page_address(sum_page); 476 sum = sum_node->entries[blkoff]; 477 f2fs_put_page(sum_page, 1); 478 got_it: 479 /* Use the locked dnode page and inode */ 480 nid = le32_to_cpu(sum.nid); 481 if (dn->inode->i_ino == nid) { 482 tdn.nid = nid; 483 if (!dn->inode_page_locked) 484 lock_page(dn->inode_page); 485 tdn.node_page = dn->inode_page; 486 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node); 487 goto truncate_out; 488 } else if (dn->nid == nid) { 489 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node); 490 goto truncate_out; 491 } 492 493 /* Get the node page */ 494 node_page = f2fs_get_node_page(sbi, nid); 495 if (IS_ERR(node_page)) 496 return PTR_ERR(node_page); 497 498 offset = ofs_of_node(node_page); 499 ino = ino_of_node(node_page); 500 f2fs_put_page(node_page, 1); 501 502 if (ino != dn->inode->i_ino) { 503 int ret; 504 505 /* Deallocate previous index in the node page */ 506 inode = f2fs_iget_retry(sbi->sb, ino); 507 if (IS_ERR(inode)) 508 return PTR_ERR(inode); 509 510 ret = dquot_initialize(inode); 511 if (ret) { 512 iput(inode); 513 return ret; 514 } 515 } else { 516 inode = dn->inode; 517 } 518 519 bidx = f2fs_start_bidx_of_node(offset, inode) + 520 le16_to_cpu(sum.ofs_in_node); 521 522 /* 523 * if inode page is locked, unlock temporarily, but its reference 524 * count keeps alive. 525 */ 526 if (ino == dn->inode->i_ino && dn->inode_page_locked) 527 unlock_page(dn->inode_page); 528 529 set_new_dnode(&tdn, inode, NULL, NULL, 0); 530 if (f2fs_get_dnode_of_data(&tdn, bidx, LOOKUP_NODE)) 531 goto out; 532 533 if (tdn.data_blkaddr == blkaddr) 534 f2fs_truncate_data_blocks_range(&tdn, 1); 535 536 f2fs_put_dnode(&tdn); 537 out: 538 if (ino != dn->inode->i_ino) 539 iput(inode); 540 else if (dn->inode_page_locked) 541 lock_page(dn->inode_page); 542 return 0; 543 544 truncate_out: 545 if (f2fs_data_blkaddr(&tdn) == blkaddr) 546 f2fs_truncate_data_blocks_range(&tdn, 1); 547 if (dn->inode->i_ino == nid && !dn->inode_page_locked) 548 unlock_page(dn->inode_page); 549 return 0; 550 } 551 552 static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode, 553 struct page *page) 554 { 555 struct dnode_of_data dn; 556 struct node_info ni; 557 unsigned int start, end; 558 int err = 0, recovered = 0; 559 560 /* step 1: recover xattr */ 561 if (IS_INODE(page)) { 562 err = f2fs_recover_inline_xattr(inode, page); 563 if (err) 564 goto out; 565 } else if (f2fs_has_xattr_block(ofs_of_node(page))) { 566 err = f2fs_recover_xattr_data(inode, page); 567 if (!err) 568 recovered++; 569 goto out; 570 } 571 572 /* step 2: recover inline data */ 573 err = f2fs_recover_inline_data(inode, page); 574 if (err) { 575 if (err == 1) 576 err = 0; 577 goto out; 578 } 579 580 /* step 3: recover data indices */ 581 start = f2fs_start_bidx_of_node(ofs_of_node(page), inode); 582 end = start + ADDRS_PER_PAGE(page, inode); 583 584 set_new_dnode(&dn, inode, NULL, NULL, 0); 585 retry_dn: 586 err = f2fs_get_dnode_of_data(&dn, start, ALLOC_NODE); 587 if (err) { 588 if (err == -ENOMEM) { 589 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT); 590 goto retry_dn; 591 } 592 goto out; 593 } 594 595 f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true); 596 597 err = f2fs_get_node_info(sbi, dn.nid, &ni); 598 if (err) 599 goto err; 600 601 f2fs_bug_on(sbi, ni.ino != ino_of_node(page)); 602 603 if (ofs_of_node(dn.node_page) != ofs_of_node(page)) { 604 f2fs_warn(sbi, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u", 605 inode->i_ino, ofs_of_node(dn.node_page), 606 ofs_of_node(page)); 607 err = -EFSCORRUPTED; 608 goto err; 609 } 610 611 for (; start < end; start++, dn.ofs_in_node++) { 612 block_t src, dest; 613 614 src = f2fs_data_blkaddr(&dn); 615 dest = data_blkaddr(dn.inode, page, dn.ofs_in_node); 616 617 if (__is_valid_data_blkaddr(src) && 618 !f2fs_is_valid_blkaddr(sbi, src, META_POR)) { 619 err = -EFSCORRUPTED; 620 goto err; 621 } 622 623 if (__is_valid_data_blkaddr(dest) && 624 !f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 625 err = -EFSCORRUPTED; 626 goto err; 627 } 628 629 /* skip recovering if dest is the same as src */ 630 if (src == dest) 631 continue; 632 633 /* dest is invalid, just invalidate src block */ 634 if (dest == NULL_ADDR) { 635 f2fs_truncate_data_blocks_range(&dn, 1); 636 continue; 637 } 638 639 if (!file_keep_isize(inode) && 640 (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT))) 641 f2fs_i_size_write(inode, 642 (loff_t)(start + 1) << PAGE_SHIFT); 643 644 /* 645 * dest is reserved block, invalidate src block 646 * and then reserve one new block in dnode page. 647 */ 648 if (dest == NEW_ADDR) { 649 f2fs_truncate_data_blocks_range(&dn, 1); 650 f2fs_reserve_new_block(&dn); 651 continue; 652 } 653 654 /* dest is valid block, try to recover from src to dest */ 655 if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 656 657 if (src == NULL_ADDR) { 658 err = f2fs_reserve_new_block(&dn); 659 while (err && 660 IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) 661 err = f2fs_reserve_new_block(&dn); 662 /* We should not get -ENOSPC */ 663 f2fs_bug_on(sbi, err); 664 if (err) 665 goto err; 666 } 667 retry_prev: 668 /* Check the previous node page having this index */ 669 err = check_index_in_prev_nodes(sbi, dest, &dn); 670 if (err) { 671 if (err == -ENOMEM) { 672 congestion_wait(BLK_RW_ASYNC, 673 DEFAULT_IO_TIMEOUT); 674 goto retry_prev; 675 } 676 goto err; 677 } 678 679 /* write dummy data page */ 680 f2fs_replace_block(sbi, &dn, src, dest, 681 ni.version, false, false); 682 recovered++; 683 } 684 } 685 686 copy_node_footer(dn.node_page, page); 687 fill_node_footer(dn.node_page, dn.nid, ni.ino, 688 ofs_of_node(page), false); 689 set_page_dirty(dn.node_page); 690 err: 691 f2fs_put_dnode(&dn); 692 out: 693 f2fs_notice(sbi, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d", 694 inode->i_ino, file_keep_isize(inode) ? "keep" : "recover", 695 recovered, err); 696 return err; 697 } 698 699 static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list, 700 struct list_head *tmp_inode_list, struct list_head *dir_list) 701 { 702 struct curseg_info *curseg; 703 struct page *page = NULL; 704 int err = 0; 705 block_t blkaddr; 706 707 /* get node pages in the current segment */ 708 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); 709 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); 710 711 while (1) { 712 struct fsync_inode_entry *entry; 713 714 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR)) 715 break; 716 717 f2fs_ra_meta_pages_cond(sbi, blkaddr); 718 719 page = f2fs_get_tmp_page(sbi, blkaddr); 720 if (IS_ERR(page)) { 721 err = PTR_ERR(page); 722 break; 723 } 724 725 if (!is_recoverable_dnode(page)) { 726 f2fs_put_page(page, 1); 727 break; 728 } 729 730 entry = get_fsync_inode(inode_list, ino_of_node(page)); 731 if (!entry) 732 goto next; 733 /* 734 * inode(x) | CP | inode(x) | dnode(F) 735 * In this case, we can lose the latest inode(x). 736 * So, call recover_inode for the inode update. 737 */ 738 if (IS_INODE(page)) { 739 err = recover_inode(entry->inode, page); 740 if (err) { 741 f2fs_put_page(page, 1); 742 break; 743 } 744 } 745 if (entry->last_dentry == blkaddr) { 746 err = recover_dentry(entry->inode, page, dir_list); 747 if (err) { 748 f2fs_put_page(page, 1); 749 break; 750 } 751 } 752 err = do_recover_data(sbi, entry->inode, page); 753 if (err) { 754 f2fs_put_page(page, 1); 755 break; 756 } 757 758 if (entry->blkaddr == blkaddr) 759 list_move_tail(&entry->list, tmp_inode_list); 760 next: 761 /* check next segment */ 762 blkaddr = next_blkaddr_of_node(page); 763 f2fs_put_page(page, 1); 764 } 765 if (!err) 766 f2fs_allocate_new_segments(sbi); 767 return err; 768 } 769 770 int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only) 771 { 772 struct list_head inode_list, tmp_inode_list; 773 struct list_head dir_list; 774 int err; 775 int ret = 0; 776 unsigned long s_flags = sbi->sb->s_flags; 777 bool need_writecp = false; 778 bool fix_curseg_write_pointer = false; 779 #ifdef CONFIG_QUOTA 780 int quota_enabled; 781 #endif 782 783 if (s_flags & SB_RDONLY) { 784 f2fs_info(sbi, "recover fsync data on readonly fs"); 785 sbi->sb->s_flags &= ~SB_RDONLY; 786 } 787 788 #ifdef CONFIG_QUOTA 789 /* Needed for iput() to work correctly and not trash data */ 790 sbi->sb->s_flags |= SB_ACTIVE; 791 /* Turn on quotas so that they are updated correctly */ 792 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY); 793 #endif 794 795 INIT_LIST_HEAD(&inode_list); 796 INIT_LIST_HEAD(&tmp_inode_list); 797 INIT_LIST_HEAD(&dir_list); 798 799 /* prevent checkpoint */ 800 down_write(&sbi->cp_global_sem); 801 802 /* step #1: find fsynced inode numbers */ 803 err = find_fsync_dnodes(sbi, &inode_list, check_only); 804 if (err || list_empty(&inode_list)) 805 goto skip; 806 807 if (check_only) { 808 ret = 1; 809 goto skip; 810 } 811 812 need_writecp = true; 813 814 /* step #2: recover data */ 815 err = recover_data(sbi, &inode_list, &tmp_inode_list, &dir_list); 816 if (!err) 817 f2fs_bug_on(sbi, !list_empty(&inode_list)); 818 else { 819 /* restore s_flags to let iput() trash data */ 820 sbi->sb->s_flags = s_flags; 821 } 822 skip: 823 fix_curseg_write_pointer = !check_only || list_empty(&inode_list); 824 825 destroy_fsync_dnodes(&inode_list, err); 826 destroy_fsync_dnodes(&tmp_inode_list, err); 827 828 /* truncate meta pages to be used by the recovery */ 829 truncate_inode_pages_range(META_MAPPING(sbi), 830 (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1); 831 832 if (err) { 833 truncate_inode_pages_final(NODE_MAPPING(sbi)); 834 truncate_inode_pages_final(META_MAPPING(sbi)); 835 } 836 837 /* 838 * If fsync data succeeds or there is no fsync data to recover, 839 * and the f2fs is not read only, check and fix zoned block devices' 840 * write pointer consistency. 841 */ 842 if (!err && fix_curseg_write_pointer && !f2fs_readonly(sbi->sb) && 843 f2fs_sb_has_blkzoned(sbi)) { 844 err = f2fs_fix_curseg_write_pointer(sbi); 845 ret = err; 846 } 847 848 if (!err) 849 clear_sbi_flag(sbi, SBI_POR_DOING); 850 851 up_write(&sbi->cp_global_sem); 852 853 /* let's drop all the directory inodes for clean checkpoint */ 854 destroy_fsync_dnodes(&dir_list, err); 855 856 if (need_writecp) { 857 set_sbi_flag(sbi, SBI_IS_RECOVERED); 858 859 if (!err) { 860 struct cp_control cpc = { 861 .reason = CP_RECOVERY, 862 }; 863 err = f2fs_write_checkpoint(sbi, &cpc); 864 } 865 } 866 867 #ifdef CONFIG_QUOTA 868 /* Turn quotas off */ 869 if (quota_enabled) 870 f2fs_quota_off_umount(sbi->sb); 871 #endif 872 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 873 874 return ret ? ret : err; 875 } 876 877 int __init f2fs_create_recovery_cache(void) 878 { 879 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry", 880 sizeof(struct fsync_inode_entry)); 881 if (!fsync_entry_slab) 882 return -ENOMEM; 883 return 0; 884 } 885 886 void f2fs_destroy_recovery_cache(void) 887 { 888 kmem_cache_destroy(fsync_entry_slab); 889 } 890