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 return true; 60 } 61 62 static struct fsync_inode_entry *get_fsync_inode(struct list_head *head, 63 nid_t ino) 64 { 65 struct fsync_inode_entry *entry; 66 67 list_for_each_entry(entry, head, list) 68 if (entry->inode->i_ino == ino) 69 return entry; 70 71 return NULL; 72 } 73 74 static struct fsync_inode_entry *add_fsync_inode(struct f2fs_sb_info *sbi, 75 struct list_head *head, nid_t ino, bool quota_inode) 76 { 77 struct inode *inode; 78 struct fsync_inode_entry *entry; 79 int err; 80 81 inode = f2fs_iget_retry(sbi->sb, ino); 82 if (IS_ERR(inode)) 83 return ERR_CAST(inode); 84 85 err = f2fs_dquot_initialize(inode); 86 if (err) 87 goto err_out; 88 89 if (quota_inode) { 90 err = dquot_alloc_inode(inode); 91 if (err) 92 goto err_out; 93 } 94 95 entry = f2fs_kmem_cache_alloc(fsync_entry_slab, 96 GFP_F2FS_ZERO, true, NULL); 97 entry->inode = inode; 98 list_add_tail(&entry->list, head); 99 100 return entry; 101 err_out: 102 iput(inode); 103 return ERR_PTR(err); 104 } 105 106 static void del_fsync_inode(struct fsync_inode_entry *entry, int drop) 107 { 108 if (drop) { 109 /* inode should not be recovered, drop it */ 110 f2fs_inode_synced(entry->inode); 111 } 112 iput(entry->inode); 113 list_del(&entry->list); 114 kmem_cache_free(fsync_entry_slab, entry); 115 } 116 117 static int init_recovered_filename(const struct inode *dir, 118 struct f2fs_inode *raw_inode, 119 struct f2fs_filename *fname, 120 struct qstr *usr_fname) 121 { 122 int err; 123 124 memset(fname, 0, sizeof(*fname)); 125 fname->disk_name.len = le32_to_cpu(raw_inode->i_namelen); 126 fname->disk_name.name = raw_inode->i_name; 127 128 if (WARN_ON(fname->disk_name.len > F2FS_NAME_LEN)) 129 return -ENAMETOOLONG; 130 131 if (!IS_ENCRYPTED(dir)) { 132 usr_fname->name = fname->disk_name.name; 133 usr_fname->len = fname->disk_name.len; 134 fname->usr_fname = usr_fname; 135 } 136 137 /* Compute the hash of the filename */ 138 if (IS_ENCRYPTED(dir) && IS_CASEFOLDED(dir)) { 139 /* 140 * In this case the hash isn't computable without the key, so it 141 * was saved on-disk. 142 */ 143 if (fname->disk_name.len + sizeof(f2fs_hash_t) > F2FS_NAME_LEN) 144 return -EINVAL; 145 fname->hash = get_unaligned((f2fs_hash_t *) 146 &raw_inode->i_name[fname->disk_name.len]); 147 } else if (IS_CASEFOLDED(dir)) { 148 err = f2fs_init_casefolded_name(dir, fname); 149 if (err) 150 return err; 151 f2fs_hash_filename(dir, fname); 152 #if IS_ENABLED(CONFIG_UNICODE) 153 /* Case-sensitive match is fine for recovery */ 154 kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name); 155 fname->cf_name.name = NULL; 156 #endif 157 } else { 158 f2fs_hash_filename(dir, fname); 159 } 160 return 0; 161 } 162 163 static int recover_dentry(struct inode *inode, struct page *ipage, 164 struct list_head *dir_list) 165 { 166 struct f2fs_inode *raw_inode = F2FS_INODE(ipage); 167 nid_t pino = le32_to_cpu(raw_inode->i_pino); 168 struct f2fs_dir_entry *de; 169 struct f2fs_filename fname; 170 struct qstr usr_fname; 171 struct page *page; 172 struct inode *dir, *einode; 173 struct fsync_inode_entry *entry; 174 int err = 0; 175 char *name; 176 177 entry = get_fsync_inode(dir_list, pino); 178 if (!entry) { 179 entry = add_fsync_inode(F2FS_I_SB(inode), dir_list, 180 pino, false); 181 if (IS_ERR(entry)) { 182 dir = ERR_CAST(entry); 183 err = PTR_ERR(entry); 184 goto out; 185 } 186 } 187 188 dir = entry->inode; 189 err = init_recovered_filename(dir, raw_inode, &fname, &usr_fname); 190 if (err) 191 goto out; 192 retry: 193 de = __f2fs_find_entry(dir, &fname, &page); 194 if (de && inode->i_ino == le32_to_cpu(de->ino)) 195 goto out_put; 196 197 if (de) { 198 einode = f2fs_iget_retry(inode->i_sb, le32_to_cpu(de->ino)); 199 if (IS_ERR(einode)) { 200 WARN_ON(1); 201 err = PTR_ERR(einode); 202 if (err == -ENOENT) 203 err = -EEXIST; 204 goto out_put; 205 } 206 207 err = f2fs_dquot_initialize(einode); 208 if (err) { 209 iput(einode); 210 goto out_put; 211 } 212 213 err = f2fs_acquire_orphan_inode(F2FS_I_SB(inode)); 214 if (err) { 215 iput(einode); 216 goto out_put; 217 } 218 f2fs_delete_entry(de, page, dir, einode); 219 iput(einode); 220 goto retry; 221 } else if (IS_ERR(page)) { 222 err = PTR_ERR(page); 223 } else { 224 err = f2fs_add_dentry(dir, &fname, inode, 225 inode->i_ino, inode->i_mode); 226 } 227 if (err == -ENOMEM) 228 goto retry; 229 goto out; 230 231 out_put: 232 f2fs_put_page(page, 0); 233 out: 234 if (file_enc_name(inode)) 235 name = "<encrypted>"; 236 else 237 name = raw_inode->i_name; 238 f2fs_notice(F2FS_I_SB(inode), "%s: ino = %x, name = %s, dir = %lx, err = %d", 239 __func__, ino_of_node(ipage), name, 240 IS_ERR(dir) ? 0 : dir->i_ino, err); 241 return err; 242 } 243 244 static int recover_quota_data(struct inode *inode, struct page *page) 245 { 246 struct f2fs_inode *raw = F2FS_INODE(page); 247 struct iattr attr; 248 uid_t i_uid = le32_to_cpu(raw->i_uid); 249 gid_t i_gid = le32_to_cpu(raw->i_gid); 250 int err; 251 252 memset(&attr, 0, sizeof(attr)); 253 254 attr.ia_uid = make_kuid(inode->i_sb->s_user_ns, i_uid); 255 attr.ia_gid = make_kgid(inode->i_sb->s_user_ns, i_gid); 256 257 if (!uid_eq(attr.ia_uid, inode->i_uid)) 258 attr.ia_valid |= ATTR_UID; 259 if (!gid_eq(attr.ia_gid, inode->i_gid)) 260 attr.ia_valid |= ATTR_GID; 261 262 if (!attr.ia_valid) 263 return 0; 264 265 err = dquot_transfer(inode, &attr); 266 if (err) 267 set_sbi_flag(F2FS_I_SB(inode), SBI_QUOTA_NEED_REPAIR); 268 return err; 269 } 270 271 static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri) 272 { 273 if (ri->i_inline & F2FS_PIN_FILE) 274 set_inode_flag(inode, FI_PIN_FILE); 275 else 276 clear_inode_flag(inode, FI_PIN_FILE); 277 if (ri->i_inline & F2FS_DATA_EXIST) 278 set_inode_flag(inode, FI_DATA_EXIST); 279 else 280 clear_inode_flag(inode, FI_DATA_EXIST); 281 } 282 283 static int recover_inode(struct inode *inode, struct page *page) 284 { 285 struct f2fs_inode *raw = F2FS_INODE(page); 286 char *name; 287 int err; 288 289 inode->i_mode = le16_to_cpu(raw->i_mode); 290 291 err = recover_quota_data(inode, page); 292 if (err) 293 return err; 294 295 i_uid_write(inode, le32_to_cpu(raw->i_uid)); 296 i_gid_write(inode, le32_to_cpu(raw->i_gid)); 297 298 if (raw->i_inline & F2FS_EXTRA_ATTR) { 299 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)) && 300 F2FS_FITS_IN_INODE(raw, le16_to_cpu(raw->i_extra_isize), 301 i_projid)) { 302 projid_t i_projid; 303 kprojid_t kprojid; 304 305 i_projid = (projid_t)le32_to_cpu(raw->i_projid); 306 kprojid = make_kprojid(&init_user_ns, i_projid); 307 308 if (!projid_eq(kprojid, F2FS_I(inode)->i_projid)) { 309 err = f2fs_transfer_project_quota(inode, 310 kprojid); 311 if (err) 312 return err; 313 F2FS_I(inode)->i_projid = kprojid; 314 } 315 } 316 } 317 318 f2fs_i_size_write(inode, le64_to_cpu(raw->i_size)); 319 inode->i_atime.tv_sec = le64_to_cpu(raw->i_atime); 320 inode->i_ctime.tv_sec = le64_to_cpu(raw->i_ctime); 321 inode->i_mtime.tv_sec = le64_to_cpu(raw->i_mtime); 322 inode->i_atime.tv_nsec = le32_to_cpu(raw->i_atime_nsec); 323 inode->i_ctime.tv_nsec = le32_to_cpu(raw->i_ctime_nsec); 324 inode->i_mtime.tv_nsec = le32_to_cpu(raw->i_mtime_nsec); 325 326 F2FS_I(inode)->i_advise = raw->i_advise; 327 F2FS_I(inode)->i_flags = le32_to_cpu(raw->i_flags); 328 f2fs_set_inode_flags(inode); 329 F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN] = 330 le16_to_cpu(raw->i_gc_failures); 331 332 recover_inline_flags(inode, raw); 333 334 f2fs_mark_inode_dirty_sync(inode, true); 335 336 if (file_enc_name(inode)) 337 name = "<encrypted>"; 338 else 339 name = F2FS_INODE(page)->i_name; 340 341 f2fs_notice(F2FS_I_SB(inode), "recover_inode: ino = %x, name = %s, inline = %x", 342 ino_of_node(page), name, raw->i_inline); 343 return 0; 344 } 345 346 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head, 347 bool check_only) 348 { 349 struct curseg_info *curseg; 350 struct page *page = NULL; 351 block_t blkaddr; 352 unsigned int loop_cnt = 0; 353 unsigned int free_blocks = MAIN_SEGS(sbi) * sbi->blocks_per_seg - 354 valid_user_blocks(sbi); 355 int err = 0; 356 357 /* get node pages in the current segment */ 358 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); 359 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); 360 361 while (1) { 362 struct fsync_inode_entry *entry; 363 364 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR)) 365 return 0; 366 367 page = f2fs_get_tmp_page(sbi, blkaddr); 368 if (IS_ERR(page)) { 369 err = PTR_ERR(page); 370 break; 371 } 372 373 if (!is_recoverable_dnode(page)) { 374 f2fs_put_page(page, 1); 375 break; 376 } 377 378 if (!is_fsync_dnode(page)) 379 goto next; 380 381 entry = get_fsync_inode(head, ino_of_node(page)); 382 if (!entry) { 383 bool quota_inode = false; 384 385 if (!check_only && 386 IS_INODE(page) && is_dent_dnode(page)) { 387 err = f2fs_recover_inode_page(sbi, page); 388 if (err) { 389 f2fs_put_page(page, 1); 390 break; 391 } 392 quota_inode = true; 393 } 394 395 /* 396 * CP | dnode(F) | inode(DF) 397 * For this case, we should not give up now. 398 */ 399 entry = add_fsync_inode(sbi, head, ino_of_node(page), 400 quota_inode); 401 if (IS_ERR(entry)) { 402 err = PTR_ERR(entry); 403 if (err == -ENOENT) { 404 err = 0; 405 goto next; 406 } 407 f2fs_put_page(page, 1); 408 break; 409 } 410 } 411 entry->blkaddr = blkaddr; 412 413 if (IS_INODE(page) && is_dent_dnode(page)) 414 entry->last_dentry = blkaddr; 415 next: 416 /* sanity check in order to detect looped node chain */ 417 if (++loop_cnt >= free_blocks || 418 blkaddr == next_blkaddr_of_node(page)) { 419 f2fs_notice(sbi, "%s: detect looped node chain, blkaddr:%u, next:%u", 420 __func__, blkaddr, 421 next_blkaddr_of_node(page)); 422 f2fs_put_page(page, 1); 423 err = -EINVAL; 424 break; 425 } 426 427 /* check next segment */ 428 blkaddr = next_blkaddr_of_node(page); 429 f2fs_put_page(page, 1); 430 431 f2fs_ra_meta_pages_cond(sbi, blkaddr); 432 } 433 return err; 434 } 435 436 static void destroy_fsync_dnodes(struct list_head *head, int drop) 437 { 438 struct fsync_inode_entry *entry, *tmp; 439 440 list_for_each_entry_safe(entry, tmp, head, list) 441 del_fsync_inode(entry, drop); 442 } 443 444 static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi, 445 block_t blkaddr, struct dnode_of_data *dn) 446 { 447 struct seg_entry *sentry; 448 unsigned int segno = GET_SEGNO(sbi, blkaddr); 449 unsigned short blkoff = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); 450 struct f2fs_summary_block *sum_node; 451 struct f2fs_summary sum; 452 struct page *sum_page, *node_page; 453 struct dnode_of_data tdn = *dn; 454 nid_t ino, nid; 455 struct inode *inode; 456 unsigned int offset; 457 block_t bidx; 458 int i; 459 460 sentry = get_seg_entry(sbi, segno); 461 if (!f2fs_test_bit(blkoff, sentry->cur_valid_map)) 462 return 0; 463 464 /* Get the previous summary */ 465 for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { 466 struct curseg_info *curseg = CURSEG_I(sbi, i); 467 468 if (curseg->segno == segno) { 469 sum = curseg->sum_blk->entries[blkoff]; 470 goto got_it; 471 } 472 } 473 474 sum_page = f2fs_get_sum_page(sbi, segno); 475 if (IS_ERR(sum_page)) 476 return PTR_ERR(sum_page); 477 sum_node = (struct f2fs_summary_block *)page_address(sum_page); 478 sum = sum_node->entries[blkoff]; 479 f2fs_put_page(sum_page, 1); 480 got_it: 481 /* Use the locked dnode page and inode */ 482 nid = le32_to_cpu(sum.nid); 483 if (dn->inode->i_ino == nid) { 484 tdn.nid = nid; 485 if (!dn->inode_page_locked) 486 lock_page(dn->inode_page); 487 tdn.node_page = dn->inode_page; 488 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node); 489 goto truncate_out; 490 } else if (dn->nid == nid) { 491 tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node); 492 goto truncate_out; 493 } 494 495 /* Get the node page */ 496 node_page = f2fs_get_node_page(sbi, nid); 497 if (IS_ERR(node_page)) 498 return PTR_ERR(node_page); 499 500 offset = ofs_of_node(node_page); 501 ino = ino_of_node(node_page); 502 f2fs_put_page(node_page, 1); 503 504 if (ino != dn->inode->i_ino) { 505 int ret; 506 507 /* Deallocate previous index in the node page */ 508 inode = f2fs_iget_retry(sbi->sb, ino); 509 if (IS_ERR(inode)) 510 return PTR_ERR(inode); 511 512 ret = f2fs_dquot_initialize(inode); 513 if (ret) { 514 iput(inode); 515 return ret; 516 } 517 } else { 518 inode = dn->inode; 519 } 520 521 bidx = f2fs_start_bidx_of_node(offset, inode) + 522 le16_to_cpu(sum.ofs_in_node); 523 524 /* 525 * if inode page is locked, unlock temporarily, but its reference 526 * count keeps alive. 527 */ 528 if (ino == dn->inode->i_ino && dn->inode_page_locked) 529 unlock_page(dn->inode_page); 530 531 set_new_dnode(&tdn, inode, NULL, NULL, 0); 532 if (f2fs_get_dnode_of_data(&tdn, bidx, LOOKUP_NODE)) 533 goto out; 534 535 if (tdn.data_blkaddr == blkaddr) 536 f2fs_truncate_data_blocks_range(&tdn, 1); 537 538 f2fs_put_dnode(&tdn); 539 out: 540 if (ino != dn->inode->i_ino) 541 iput(inode); 542 else if (dn->inode_page_locked) 543 lock_page(dn->inode_page); 544 return 0; 545 546 truncate_out: 547 if (f2fs_data_blkaddr(&tdn) == blkaddr) 548 f2fs_truncate_data_blocks_range(&tdn, 1); 549 if (dn->inode->i_ino == nid && !dn->inode_page_locked) 550 unlock_page(dn->inode_page); 551 return 0; 552 } 553 554 static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode, 555 struct page *page) 556 { 557 struct dnode_of_data dn; 558 struct node_info ni; 559 unsigned int start, end; 560 int err = 0, recovered = 0; 561 562 /* step 1: recover xattr */ 563 if (IS_INODE(page)) { 564 err = f2fs_recover_inline_xattr(inode, page); 565 if (err) 566 goto out; 567 } else if (f2fs_has_xattr_block(ofs_of_node(page))) { 568 err = f2fs_recover_xattr_data(inode, page); 569 if (!err) 570 recovered++; 571 goto out; 572 } 573 574 /* step 2: recover inline data */ 575 err = f2fs_recover_inline_data(inode, page); 576 if (err) { 577 if (err == 1) 578 err = 0; 579 goto out; 580 } 581 582 /* step 3: recover data indices */ 583 start = f2fs_start_bidx_of_node(ofs_of_node(page), inode); 584 end = start + ADDRS_PER_PAGE(page, inode); 585 586 set_new_dnode(&dn, inode, NULL, NULL, 0); 587 retry_dn: 588 err = f2fs_get_dnode_of_data(&dn, start, ALLOC_NODE); 589 if (err) { 590 if (err == -ENOMEM) { 591 memalloc_retry_wait(GFP_NOFS); 592 goto retry_dn; 593 } 594 goto out; 595 } 596 597 f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true); 598 599 err = f2fs_get_node_info(sbi, dn.nid, &ni, false); 600 if (err) 601 goto err; 602 603 f2fs_bug_on(sbi, ni.ino != ino_of_node(page)); 604 605 if (ofs_of_node(dn.node_page) != ofs_of_node(page)) { 606 f2fs_warn(sbi, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u", 607 inode->i_ino, ofs_of_node(dn.node_page), 608 ofs_of_node(page)); 609 err = -EFSCORRUPTED; 610 goto err; 611 } 612 613 for (; start < end; start++, dn.ofs_in_node++) { 614 block_t src, dest; 615 616 src = f2fs_data_blkaddr(&dn); 617 dest = data_blkaddr(dn.inode, page, dn.ofs_in_node); 618 619 if (__is_valid_data_blkaddr(src) && 620 !f2fs_is_valid_blkaddr(sbi, src, META_POR)) { 621 err = -EFSCORRUPTED; 622 goto err; 623 } 624 625 if (__is_valid_data_blkaddr(dest) && 626 !f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 627 err = -EFSCORRUPTED; 628 goto err; 629 } 630 631 /* skip recovering if dest is the same as src */ 632 if (src == dest) 633 continue; 634 635 /* dest is invalid, just invalidate src block */ 636 if (dest == NULL_ADDR) { 637 f2fs_truncate_data_blocks_range(&dn, 1); 638 continue; 639 } 640 641 if (!file_keep_isize(inode) && 642 (i_size_read(inode) <= ((loff_t)start << PAGE_SHIFT))) 643 f2fs_i_size_write(inode, 644 (loff_t)(start + 1) << PAGE_SHIFT); 645 646 /* 647 * dest is reserved block, invalidate src block 648 * and then reserve one new block in dnode page. 649 */ 650 if (dest == NEW_ADDR) { 651 f2fs_truncate_data_blocks_range(&dn, 1); 652 f2fs_reserve_new_block(&dn); 653 continue; 654 } 655 656 /* dest is valid block, try to recover from src to dest */ 657 if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) { 658 659 if (src == NULL_ADDR) { 660 err = f2fs_reserve_new_block(&dn); 661 while (err && 662 IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) 663 err = f2fs_reserve_new_block(&dn); 664 /* We should not get -ENOSPC */ 665 f2fs_bug_on(sbi, err); 666 if (err) 667 goto err; 668 } 669 retry_prev: 670 /* Check the previous node page having this index */ 671 err = check_index_in_prev_nodes(sbi, dest, &dn); 672 if (err) { 673 if (err == -ENOMEM) { 674 memalloc_retry_wait(GFP_NOFS); 675 goto retry_prev; 676 } 677 goto err; 678 } 679 680 /* write dummy data page */ 681 f2fs_replace_block(sbi, &dn, src, dest, 682 ni.version, false, false); 683 recovered++; 684 } 685 } 686 687 copy_node_footer(dn.node_page, page); 688 fill_node_footer(dn.node_page, dn.nid, ni.ino, 689 ofs_of_node(page), false); 690 set_page_dirty(dn.node_page); 691 err: 692 f2fs_put_dnode(&dn); 693 out: 694 f2fs_notice(sbi, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d", 695 inode->i_ino, file_keep_isize(inode) ? "keep" : "recover", 696 recovered, err); 697 return err; 698 } 699 700 static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list, 701 struct list_head *tmp_inode_list, struct list_head *dir_list) 702 { 703 struct curseg_info *curseg; 704 struct page *page = NULL; 705 int err = 0; 706 block_t blkaddr; 707 708 /* get node pages in the current segment */ 709 curseg = CURSEG_I(sbi, CURSEG_WARM_NODE); 710 blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); 711 712 while (1) { 713 struct fsync_inode_entry *entry; 714 715 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR)) 716 break; 717 718 f2fs_ra_meta_pages_cond(sbi, blkaddr); 719 720 page = f2fs_get_tmp_page(sbi, blkaddr); 721 if (IS_ERR(page)) { 722 err = PTR_ERR(page); 723 break; 724 } 725 726 if (!is_recoverable_dnode(page)) { 727 f2fs_put_page(page, 1); 728 break; 729 } 730 731 entry = get_fsync_inode(inode_list, ino_of_node(page)); 732 if (!entry) 733 goto next; 734 /* 735 * inode(x) | CP | inode(x) | dnode(F) 736 * In this case, we can lose the latest inode(x). 737 * So, call recover_inode for the inode update. 738 */ 739 if (IS_INODE(page)) { 740 err = recover_inode(entry->inode, page); 741 if (err) { 742 f2fs_put_page(page, 1); 743 break; 744 } 745 } 746 if (entry->last_dentry == blkaddr) { 747 err = recover_dentry(entry->inode, page, dir_list); 748 if (err) { 749 f2fs_put_page(page, 1); 750 break; 751 } 752 } 753 err = do_recover_data(sbi, entry->inode, page); 754 if (err) { 755 f2fs_put_page(page, 1); 756 break; 757 } 758 759 if (entry->blkaddr == blkaddr) 760 list_move_tail(&entry->list, tmp_inode_list); 761 next: 762 /* check next segment */ 763 blkaddr = next_blkaddr_of_node(page); 764 f2fs_put_page(page, 1); 765 } 766 if (!err) 767 f2fs_allocate_new_segments(sbi); 768 return err; 769 } 770 771 int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only) 772 { 773 struct list_head inode_list, tmp_inode_list; 774 struct list_head dir_list; 775 int err; 776 int ret = 0; 777 unsigned long s_flags = sbi->sb->s_flags; 778 bool need_writecp = false; 779 bool fix_curseg_write_pointer = false; 780 #ifdef CONFIG_QUOTA 781 int quota_enabled; 782 #endif 783 784 if (s_flags & SB_RDONLY) { 785 f2fs_info(sbi, "recover fsync data on readonly fs"); 786 sbi->sb->s_flags &= ~SB_RDONLY; 787 } 788 789 #ifdef CONFIG_QUOTA 790 /* Turn on quotas so that they are updated correctly */ 791 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY); 792 #endif 793 794 INIT_LIST_HEAD(&inode_list); 795 INIT_LIST_HEAD(&tmp_inode_list); 796 INIT_LIST_HEAD(&dir_list); 797 798 /* prevent checkpoint */ 799 down_write(&sbi->cp_global_sem); 800 801 /* step #1: find fsynced inode numbers */ 802 err = find_fsync_dnodes(sbi, &inode_list, check_only); 803 if (err || list_empty(&inode_list)) 804 goto skip; 805 806 if (check_only) { 807 ret = 1; 808 goto skip; 809 } 810 811 need_writecp = true; 812 813 /* step #2: recover data */ 814 err = recover_data(sbi, &inode_list, &tmp_inode_list, &dir_list); 815 if (!err) 816 f2fs_bug_on(sbi, !list_empty(&inode_list)); 817 else 818 f2fs_bug_on(sbi, sbi->sb->s_flags & SB_ACTIVE); 819 skip: 820 fix_curseg_write_pointer = !check_only || list_empty(&inode_list); 821 822 destroy_fsync_dnodes(&inode_list, err); 823 destroy_fsync_dnodes(&tmp_inode_list, err); 824 825 /* truncate meta pages to be used by the recovery */ 826 truncate_inode_pages_range(META_MAPPING(sbi), 827 (loff_t)MAIN_BLKADDR(sbi) << PAGE_SHIFT, -1); 828 829 if (err) { 830 truncate_inode_pages_final(NODE_MAPPING(sbi)); 831 truncate_inode_pages_final(META_MAPPING(sbi)); 832 } 833 834 /* 835 * If fsync data succeeds or there is no fsync data to recover, 836 * and the f2fs is not read only, check and fix zoned block devices' 837 * write pointer consistency. 838 */ 839 if (!err && fix_curseg_write_pointer && !f2fs_readonly(sbi->sb) && 840 f2fs_sb_has_blkzoned(sbi)) { 841 err = f2fs_fix_curseg_write_pointer(sbi); 842 ret = err; 843 } 844 845 if (!err) 846 clear_sbi_flag(sbi, SBI_POR_DOING); 847 848 up_write(&sbi->cp_global_sem); 849 850 /* let's drop all the directory inodes for clean checkpoint */ 851 destroy_fsync_dnodes(&dir_list, err); 852 853 if (need_writecp) { 854 set_sbi_flag(sbi, SBI_IS_RECOVERED); 855 856 if (!err) { 857 struct cp_control cpc = { 858 .reason = CP_RECOVERY, 859 }; 860 err = f2fs_write_checkpoint(sbi, &cpc); 861 } 862 } 863 864 #ifdef CONFIG_QUOTA 865 /* Turn quotas off */ 866 if (quota_enabled) 867 f2fs_quota_off_umount(sbi->sb); 868 #endif 869 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 870 871 return ret ? ret : err; 872 } 873 874 int __init f2fs_create_recovery_cache(void) 875 { 876 fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry", 877 sizeof(struct fsync_inode_entry)); 878 if (!fsync_entry_slab) 879 return -ENOMEM; 880 return 0; 881 } 882 883 void f2fs_destroy_recovery_cache(void) 884 { 885 kmem_cache_destroy(fsync_entry_slab); 886 } 887