fs/f2fs/checkpoint.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/checkpoint.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/fs.h>
   9 #include <linux/bio.h>
  10 #include <linux/mpage.h>
  11 #include <linux/writeback.h>
  12 #include <linux/blkdev.h>
  13 #include <linux/f2fs_fs.h>
  14 #include <linux/pagevec.h>
  15 #include <linux/swap.h>
  16
  17 #include "f2fs.h"
  18 #include "node.h"
  19 #include "segment.h"
  20 #include "trace.h"
  21 #include <trace/events/f2fs.h>
  22
  23 static struct kmem_cache *ino_entry_slab;
  24 struct kmem_cache *f2fs_inode_entry_slab;
  25
  26 void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io)
  27 {
  28         f2fs_build_fault_attr(sbi, 0, 0);
  29         set_ckpt_flags(sbi, CP_ERROR_FLAG);
  30         if (!end_io)
  31                 f2fs_flush_merged_writes(sbi);
  32 }
  33
  34 /*
  35  * We guarantee no failure on the returned page.
  36  */
  37 struct page *f2fs_grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
  38 {
  39         struct address_space *mapping = META_MAPPING(sbi);
  40         struct page *page = NULL;
  41 repeat:
  42         page = f2fs_grab_cache_page(mapping, index, false);
  43         if (!page) {
  44                 cond_resched();
  45                 goto repeat;
  46         }
  47         f2fs_wait_on_page_writeback(page, META, true, true);
  48         if (!PageUptodate(page))
  49                 SetPageUptodate(page);
  50         return page;
  51 }
  52
  53 /*
  54  * We guarantee no failure on the returned page.
  55  */
  56 static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
  57                                                         bool is_meta)
  58 {
  59         struct address_space *mapping = META_MAPPING(sbi);
  60         struct page *page;
  61         struct f2fs_io_info fio = {
  62                 .sbi = sbi,
  63                 .type = META,
  64                 .op = REQ_OP_READ,
  65                 .op_flags = REQ_META | REQ_PRIO,
  66                 .old_blkaddr = index,
  67                 .new_blkaddr = index,
  68                 .encrypted_page = NULL,
  69                 .is_por = !is_meta,
  70         };
  71         int err;
  72
  73         if (unlikely(!is_meta))
  74                 fio.op_flags &= ~REQ_META;
  75 repeat:
  76         page = f2fs_grab_cache_page(mapping, index, false);
  77         if (!page) {
  78                 cond_resched();
  79                 goto repeat;
  80         }
  81         if (PageUptodate(page))
  82                 goto out;
  83
  84         fio.page = page;
  85
  86         err = f2fs_submit_page_bio(&fio);
  87         if (err) {
  88                 f2fs_put_page(page, 1);
  89                 return ERR_PTR(err);
  90         }
  91
  92         lock_page(page);
  93         if (unlikely(page->mapping != mapping)) {
  94                 f2fs_put_page(page, 1);
  95                 goto repeat;
  96         }
  97
  98         if (unlikely(!PageUptodate(page))) {
  99                 f2fs_put_page(page, 1);
 100                 return ERR_PTR(-EIO);
 101         }
 102 out:
 103         return page;
 104 }
 105
 106 struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
 107 {
 108         return __get_meta_page(sbi, index, true);
 109 }
 110
 111 struct page *f2fs_get_meta_page_nofail(struct f2fs_sb_info *sbi, pgoff_t index)
 112 {
 113         struct page *page;
 114         int count = 0;
 115
 116 retry:
 117         page = __get_meta_page(sbi, index, true);
 118         if (IS_ERR(page)) {
 119                 if (PTR_ERR(page) == -EIO &&
 120                                 ++count <= DEFAULT_RETRY_IO_COUNT)
 121                         goto retry;
 122                 f2fs_stop_checkpoint(sbi, false);
 123         }
 124         return page;
 125 }
 126
 127 /* for POR only */
 128 struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
 129 {
 130         return __get_meta_page(sbi, index, false);
 131 }
 132
 133 static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
 134                                                         int type)
 135 {
 136         struct seg_entry *se;
 137         unsigned int segno, offset;
 138         bool exist;
 139
 140         if (type != DATA_GENERIC_ENHANCE && type != DATA_GENERIC_ENHANCE_READ)
 141                 return true;
 142
 143         segno = GET_SEGNO(sbi, blkaddr);
 144         offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
 145         se = get_seg_entry(sbi, segno);
 146
 147         exist = f2fs_test_bit(offset, se->cur_valid_map);
 148         if (!exist && type == DATA_GENERIC_ENHANCE) {
 149                 f2fs_err(sbi, "Inconsistent error blkaddr:%u, sit bitmap:%d",
 150                          blkaddr, exist);
 151                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 152                 WARN_ON(1);
 153         }
 154         return exist;
 155 }
 156
 157 bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
 158                                         block_t blkaddr, int type)
 159 {
 160         switch (type) {
 161         case META_NAT:
 162                 break;
 163         case META_SIT:
 164                 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
 165                         return false;
 166                 break;
 167         case META_SSA:
 168                 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
 169                         blkaddr < SM_I(sbi)->ssa_blkaddr))
 170                         return false;
 171                 break;
 172         case META_CP:
 173                 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
 174                         blkaddr < __start_cp_addr(sbi)))
 175                         return false;
 176                 break;
 177         case META_POR:
 178                 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
 179                         blkaddr < MAIN_BLKADDR(sbi)))
 180                         return false;
 181                 break;
 182         case DATA_GENERIC:
 183         case DATA_GENERIC_ENHANCE:
 184         case DATA_GENERIC_ENHANCE_READ:
 185                 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
 186                                 blkaddr < MAIN_BLKADDR(sbi))) {
 187                         f2fs_warn(sbi, "access invalid blkaddr:%u",
 188                                   blkaddr);
 189                         set_sbi_flag(sbi, SBI_NEED_FSCK);
 190                         WARN_ON(1);
 191                         return false;
 192                 } else {
 193                         return __is_bitmap_valid(sbi, blkaddr, type);
 194                 }
 195                 break;
 196         case META_GENERIC:
 197                 if (unlikely(blkaddr < SEG0_BLKADDR(sbi) ||
 198                         blkaddr >= MAIN_BLKADDR(sbi)))
 199                         return false;
 200                 break;
 201         default:
 202                 BUG();
 203         }
 204
 205         return true;
 206 }
 207
 208 /*
 209  * Readahead CP/NAT/SIT/SSA pages
 210  */
 211 int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
 212                                                         int type, bool sync)
 213 {
 214         struct page *page;
 215         block_t blkno = start;
 216         struct f2fs_io_info fio = {
 217                 .sbi = sbi,
 218                 .type = META,
 219                 .op = REQ_OP_READ,
 220                 .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
 221                 .encrypted_page = NULL,
 222                 .in_list = false,
 223                 .is_por = (type == META_POR),
 224         };
 225         struct blk_plug plug;
 226
 227         if (unlikely(type == META_POR))
 228                 fio.op_flags &= ~REQ_META;
 229
 230         blk_start_plug(&plug);
 231         for (; nrpages-- > 0; blkno++) {
 232
 233                 if (!f2fs_is_valid_blkaddr(sbi, blkno, type))
 234                         goto out;
 235
 236                 switch (type) {
 237                 case META_NAT:
 238                         if (unlikely(blkno >=
 239                                         NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
 240                                 blkno = 0;
 241                         /* get nat block addr */
 242                         fio.new_blkaddr = current_nat_addr(sbi,
 243                                         blkno * NAT_ENTRY_PER_BLOCK);
 244                         break;
 245                 case META_SIT:
 246                         /* get sit block addr */
 247                         fio.new_blkaddr = current_sit_addr(sbi,
 248                                         blkno * SIT_ENTRY_PER_BLOCK);
 249                         break;
 250                 case META_SSA:
 251                 case META_CP:
 252                 case META_POR:
 253                         fio.new_blkaddr = blkno;
 254                         break;
 255                 default:
 256                         BUG();
 257                 }
 258
 259                 page = f2fs_grab_cache_page(META_MAPPING(sbi),
 260                                                 fio.new_blkaddr, false);
 261                 if (!page)
 262                         continue;
 263                 if (PageUptodate(page)) {
 264                         f2fs_put_page(page, 1);
 265                         continue;
 266                 }
 267
 268                 fio.page = page;
 269                 f2fs_submit_page_bio(&fio);
 270                 f2fs_put_page(page, 0);
 271         }
 272 out:
 273         blk_finish_plug(&plug);
 274         return blkno - start;
 275 }
 276
 277 void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
 278 {
 279         struct page *page;
 280         bool readahead = false;
 281
 282         page = find_get_page(META_MAPPING(sbi), index);
 283         if (!page || !PageUptodate(page))
 284                 readahead = true;
 285         f2fs_put_page(page, 0);
 286
 287         if (readahead)
 288                 f2fs_ra_meta_pages(sbi, index, BIO_MAX_PAGES, META_POR, true);
 289 }
 290
 291 static int __f2fs_write_meta_page(struct page *page,
 292                                 struct writeback_control *wbc,
 293                                 enum iostat_type io_type)
 294 {
 295         struct f2fs_sb_info *sbi = F2FS_P_SB(page);
 296
 297         trace_f2fs_writepage(page, META);
 298
 299         if (unlikely(f2fs_cp_error(sbi)))
 300                 goto redirty_out;
 301         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
 302                 goto redirty_out;
 303         if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
 304                 goto redirty_out;
 305
 306         f2fs_do_write_meta_page(sbi, page, io_type);
 307         dec_page_count(sbi, F2FS_DIRTY_META);
 308
 309         if (wbc->for_reclaim)
 310                 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, META);
 311
 312         unlock_page(page);
 313
 314         if (unlikely(f2fs_cp_error(sbi)))
 315                 f2fs_submit_merged_write(sbi, META);
 316
 317         return 0;
 318
 319 redirty_out:
 320         redirty_page_for_writepage(wbc, page);
 321         return AOP_WRITEPAGE_ACTIVATE;
 322 }
 323
 324 static int f2fs_write_meta_page(struct page *page,
 325                                 struct writeback_control *wbc)
 326 {
 327         return __f2fs_write_meta_page(page, wbc, FS_META_IO);
 328 }
 329
 330 static int f2fs_write_meta_pages(struct address_space *mapping,
 331                                 struct writeback_control *wbc)
 332 {
 333         struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
 334         long diff, written;
 335
 336         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
 337                 goto skip_write;
 338
 339         /* collect a number of dirty meta pages and write together */
 340         if (wbc->sync_mode != WB_SYNC_ALL &&
 341                         get_pages(sbi, F2FS_DIRTY_META) <
 342                                         nr_pages_to_skip(sbi, META))
 343                 goto skip_write;
 344
 345         /* if locked failed, cp will flush dirty pages instead */
 346         if (!mutex_trylock(&sbi->cp_mutex))
 347                 goto skip_write;
 348
 349         trace_f2fs_writepages(mapping->host, wbc, META);
 350         diff = nr_pages_to_write(sbi, META, wbc);
 351         written = f2fs_sync_meta_pages(sbi, META, wbc->nr_to_write, FS_META_IO);
 352         mutex_unlock(&sbi->cp_mutex);
 353         wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
 354         return 0;
 355
 356 skip_write:
 357         wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
 358         trace_f2fs_writepages(mapping->host, wbc, META);
 359         return 0;
 360 }
 361
 362 long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
 363                                 long nr_to_write, enum iostat_type io_type)
 364 {
 365         struct address_space *mapping = META_MAPPING(sbi);
 366         pgoff_t index = 0, prev = ULONG_MAX;
 367         struct pagevec pvec;
 368         long nwritten = 0;
 369         int nr_pages;
 370         struct writeback_control wbc = {
 371                 .for_reclaim = 0,
 372         };
 373         struct blk_plug plug;
 374
 375         pagevec_init(&pvec);
 376
 377         blk_start_plug(&plug);
 378
 379         while ((nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
 380                                 PAGECACHE_TAG_DIRTY))) {
 381                 int i;
 382
 383                 for (i = 0; i < nr_pages; i++) {
 384                         struct page *page = pvec.pages[i];
 385
 386                         if (prev == ULONG_MAX)
 387                                 prev = page->index - 1;
 388                         if (nr_to_write != LONG_MAX && page->index != prev + 1) {
 389                                 pagevec_release(&pvec);
 390                                 goto stop;
 391                         }
 392
 393                         lock_page(page);
 394
 395                         if (unlikely(page->mapping != mapping)) {
 396 continue_unlock:
 397                                 unlock_page(page);
 398                                 continue;
 399                         }
 400                         if (!PageDirty(page)) {
 401                                 /* someone wrote it for us */
 402                                 goto continue_unlock;
 403                         }
 404
 405                         f2fs_wait_on_page_writeback(page, META, true, true);
 406
 407                         if (!clear_page_dirty_for_io(page))
 408                                 goto continue_unlock;
 409
 410                         if (__f2fs_write_meta_page(page, &wbc, io_type)) {
 411                                 unlock_page(page);
 412                                 break;
 413                         }
 414                         nwritten++;
 415                         prev = page->index;
 416                         if (unlikely(nwritten >= nr_to_write))
 417                                 break;
 418                 }
 419                 pagevec_release(&pvec);
 420                 cond_resched();
 421         }
 422 stop:
 423         if (nwritten)
 424                 f2fs_submit_merged_write(sbi, type);
 425
 426         blk_finish_plug(&plug);
 427
 428         return nwritten;
 429 }
 430
 431 static int f2fs_set_meta_page_dirty(struct page *page)
 432 {
 433         trace_f2fs_set_page_dirty(page, META);
 434
 435         if (!PageUptodate(page))
 436                 SetPageUptodate(page);
 437         if (!PageDirty(page)) {
 438                 __set_page_dirty_nobuffers(page);
 439                 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
 440                 f2fs_set_page_private(page, 0);
 441                 f2fs_trace_pid(page);
 442                 return 1;
 443         }
 444         return 0;
 445 }
 446
 447 const struct address_space_operations f2fs_meta_aops = {
 448         .writepage      = f2fs_write_meta_page,
 449         .writepages     = f2fs_write_meta_pages,
 450         .set_page_dirty = f2fs_set_meta_page_dirty,
 451         .invalidatepage = f2fs_invalidate_page,
 452         .releasepage    = f2fs_release_page,
 453 #ifdef CONFIG_MIGRATION
 454         .migratepage    = f2fs_migrate_page,
 455 #endif
 456 };
 457
 458 static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
 459                                                 unsigned int devidx, int type)
 460 {
 461         struct inode_management *im = &sbi->im[type];
 462         struct ino_entry *e, *tmp;
 463
 464         tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
 465
 466         radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
 467
 468         spin_lock(&im->ino_lock);
 469         e = radix_tree_lookup(&im->ino_root, ino);
 470         if (!e) {
 471                 e = tmp;
 472                 if (unlikely(radix_tree_insert(&im->ino_root, ino, e)))
 473                         f2fs_bug_on(sbi, 1);
 474
 475                 memset(e, 0, sizeof(struct ino_entry));
 476                 e->ino = ino;
 477
 478                 list_add_tail(&e->list, &im->ino_list);
 479                 if (type != ORPHAN_INO)
 480                         im->ino_num++;
 481         }
 482
 483         if (type == FLUSH_INO)
 484                 f2fs_set_bit(devidx, (char *)&e->dirty_device);
 485
 486         spin_unlock(&im->ino_lock);
 487         radix_tree_preload_end();
 488
 489         if (e != tmp)
 490                 kmem_cache_free(ino_entry_slab, tmp);
 491 }
 492
 493 static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
 494 {
 495         struct inode_management *im = &sbi->im[type];
 496         struct ino_entry *e;
 497
 498         spin_lock(&im->ino_lock);
 499         e = radix_tree_lookup(&im->ino_root, ino);
 500         if (e) {
 501                 list_del(&e->list);
 502                 radix_tree_delete(&im->ino_root, ino);
 503                 im->ino_num--;
 504                 spin_unlock(&im->ino_lock);
 505                 kmem_cache_free(ino_entry_slab, e);
 506                 return;
 507         }
 508         spin_unlock(&im->ino_lock);
 509 }
 510
 511 void f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
 512 {
 513         /* add new dirty ino entry into list */
 514         __add_ino_entry(sbi, ino, 0, type);
 515 }
 516
 517 void f2fs_remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
 518 {
 519         /* remove dirty ino entry from list */
 520         __remove_ino_entry(sbi, ino, type);
 521 }
 522
 523 /* mode should be APPEND_INO or UPDATE_INO */
 524 bool f2fs_exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
 525 {
 526         struct inode_management *im = &sbi->im[mode];
 527         struct ino_entry *e;
 528
 529         spin_lock(&im->ino_lock);
 530         e = radix_tree_lookup(&im->ino_root, ino);
 531         spin_unlock(&im->ino_lock);
 532         return e ? true : false;
 533 }
 534
 535 void f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all)
 536 {
 537         struct ino_entry *e, *tmp;
 538         int i;
 539
 540         for (i = all ? ORPHAN_INO : APPEND_INO; i < MAX_INO_ENTRY; i++) {
 541                 struct inode_management *im = &sbi->im[i];
 542
 543                 spin_lock(&im->ino_lock);
 544                 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
 545                         list_del(&e->list);
 546                         radix_tree_delete(&im->ino_root, e->ino);
 547                         kmem_cache_free(ino_entry_slab, e);
 548                         im->ino_num--;
 549                 }
 550                 spin_unlock(&im->ino_lock);
 551         }
 552 }
 553
 554 void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
 555                                         unsigned int devidx, int type)
 556 {
 557         __add_ino_entry(sbi, ino, devidx, type);
 558 }
 559
 560 bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
 561                                         unsigned int devidx, int type)
 562 {
 563         struct inode_management *im = &sbi->im[type];
 564         struct ino_entry *e;
 565         bool is_dirty = false;
 566
 567         spin_lock(&im->ino_lock);
 568         e = radix_tree_lookup(&im->ino_root, ino);
 569         if (e && f2fs_test_bit(devidx, (char *)&e->dirty_device))
 570                 is_dirty = true;
 571         spin_unlock(&im->ino_lock);
 572         return is_dirty;
 573 }
 574
 575 int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi)
 576 {
 577         struct inode_management *im = &sbi->im[ORPHAN_INO];
 578         int err = 0;
 579
 580         spin_lock(&im->ino_lock);
 581
 582         if (time_to_inject(sbi, FAULT_ORPHAN)) {
 583                 spin_unlock(&im->ino_lock);
 584                 f2fs_show_injection_info(sbi, FAULT_ORPHAN);
 585                 return -ENOSPC;
 586         }
 587
 588         if (unlikely(im->ino_num >= sbi->max_orphans))
 589                 err = -ENOSPC;
 590         else
 591                 im->ino_num++;
 592         spin_unlock(&im->ino_lock);
 593
 594         return err;
 595 }
 596
 597 void f2fs_release_orphan_inode(struct f2fs_sb_info *sbi)
 598 {
 599         struct inode_management *im = &sbi->im[ORPHAN_INO];
 600
 601         spin_lock(&im->ino_lock);
 602         f2fs_bug_on(sbi, im->ino_num == 0);
 603         im->ino_num--;
 604         spin_unlock(&im->ino_lock);
 605 }
 606
 607 void f2fs_add_orphan_inode(struct inode *inode)
 608 {
 609         /* add new orphan ino entry into list */
 610         __add_ino_entry(F2FS_I_SB(inode), inode->i_ino, 0, ORPHAN_INO);
 611         f2fs_update_inode_page(inode);
 612 }
 613
 614 void f2fs_remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
 615 {
 616         /* remove orphan entry from orphan list */
 617         __remove_ino_entry(sbi, ino, ORPHAN_INO);
 618 }
 619
 620 static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
 621 {
 622         struct inode *inode;
 623         struct node_info ni;
 624         int err;
 625
 626         inode = f2fs_iget_retry(sbi->sb, ino);
 627         if (IS_ERR(inode)) {
 628                 /*
 629                  * there should be a bug that we can't find the entry
 630                  * to orphan inode.
 631                  */
 632                 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
 633                 return PTR_ERR(inode);
 634         }
 635
 636         err = dquot_initialize(inode);
 637         if (err) {
 638                 iput(inode);
 639                 goto err_out;
 640         }
 641
 642         clear_nlink(inode);
 643
 644         /* truncate all the data during iput */
 645         iput(inode);
 646
 647         err = f2fs_get_node_info(sbi, ino, &ni);
 648         if (err)
 649                 goto err_out;
 650
 651         /* ENOMEM was fully retried in f2fs_evict_inode. */
 652         if (ni.blk_addr != NULL_ADDR) {
 653                 err = -EIO;
 654                 goto err_out;
 655         }
 656         return 0;
 657
 658 err_out:
 659         set_sbi_flag(sbi, SBI_NEED_FSCK);
 660         f2fs_warn(sbi, "%s: orphan failed (ino=%x), run fsck to fix.",
 661                   __func__, ino);
 662         return err;
 663 }
 664
 665 int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
 666 {
 667         block_t start_blk, orphan_blocks, i, j;
 668         unsigned int s_flags = sbi->sb->s_flags;
 669         int err = 0;
 670 #ifdef CONFIG_QUOTA
 671         int quota_enabled;
 672 #endif
 673
 674         if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
 675                 return 0;
 676
 677         if (bdev_read_only(sbi->sb->s_bdev)) {
 678                 f2fs_info(sbi, "write access unavailable, skipping orphan cleanup");
 679                 return 0;
 680         }
 681
 682         if (s_flags & SB_RDONLY) {
 683                 f2fs_info(sbi, "orphan cleanup on readonly fs");
 684                 sbi->sb->s_flags &= ~SB_RDONLY;
 685         }
 686
 687 #ifdef CONFIG_QUOTA
 688         /* Needed for iput() to work correctly and not trash data */
 689         sbi->sb->s_flags |= SB_ACTIVE;
 690
 691         /*
 692          * Turn on quotas which were not enabled for read-only mounts if
 693          * filesystem has quota feature, so that they are updated correctly.
 694          */
 695         quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
 696 #endif
 697
 698         start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
 699         orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
 700
 701         f2fs_ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
 702
 703         for (i = 0; i < orphan_blocks; i++) {
 704                 struct page *page;
 705                 struct f2fs_orphan_block *orphan_blk;
 706
 707                 page = f2fs_get_meta_page(sbi, start_blk + i);
 708                 if (IS_ERR(page)) {
 709                         err = PTR_ERR(page);
 710                         goto out;
 711                 }
 712
 713                 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
 714                 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
 715                         nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
 716                         err = recover_orphan_inode(sbi, ino);
 717                         if (err) {
 718                                 f2fs_put_page(page, 1);
 719                                 goto out;
 720                         }
 721                 }
 722                 f2fs_put_page(page, 1);
 723         }
 724         /* clear Orphan Flag */
 725         clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG);
 726 out:
 727         set_sbi_flag(sbi, SBI_IS_RECOVERED);
 728
 729 #ifdef CONFIG_QUOTA
 730         /* Turn quotas off */
 731         if (quota_enabled)
 732                 f2fs_quota_off_umount(sbi->sb);
 733 #endif
 734         sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
 735
 736         return err;
 737 }
 738
 739 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
 740 {
 741         struct list_head *head;
 742         struct f2fs_orphan_block *orphan_blk = NULL;
 743         unsigned int nentries = 0;
 744         unsigned short index = 1;
 745         unsigned short orphan_blocks;
 746         struct page *page = NULL;
 747         struct ino_entry *orphan = NULL;
 748         struct inode_management *im = &sbi->im[ORPHAN_INO];
 749
 750         orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
 751
 752         /*
 753          * we don't need to do spin_lock(&im->ino_lock) here, since all the
 754          * orphan inode operations are covered under f2fs_lock_op().
 755          * And, spin_lock should be avoided due to page operations below.
 756          */
 757         head = &im->ino_list;
 758
 759         /* loop for each orphan inode entry and write them in Jornal block */
 760         list_for_each_entry(orphan, head, list) {
 761                 if (!page) {
 762                         page = f2fs_grab_meta_page(sbi, start_blk++);
 763                         orphan_blk =
 764                                 (struct f2fs_orphan_block *)page_address(page);
 765                         memset(orphan_blk, 0, sizeof(*orphan_blk));
 766                 }
 767
 768                 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
 769
 770                 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
 771                         /*
 772                          * an orphan block is full of 1020 entries,
 773                          * then we need to flush current orphan blocks
 774                          * and bring another one in memory
 775                          */
 776                         orphan_blk->blk_addr = cpu_to_le16(index);
 777                         orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
 778                         orphan_blk->entry_count = cpu_to_le32(nentries);
 779                         set_page_dirty(page);
 780                         f2fs_put_page(page, 1);
 781                         index++;
 782                         nentries = 0;
 783                         page = NULL;
 784                 }
 785         }
 786
 787         if (page) {
 788                 orphan_blk->blk_addr = cpu_to_le16(index);
 789                 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
 790                 orphan_blk->entry_count = cpu_to_le32(nentries);
 791                 set_page_dirty(page);
 792                 f2fs_put_page(page, 1);
 793         }
 794 }
 795
 796 static __u32 f2fs_checkpoint_chksum(struct f2fs_sb_info *sbi,
 797                                                 struct f2fs_checkpoint *ckpt)
 798 {
 799         unsigned int chksum_ofs = le32_to_cpu(ckpt->checksum_offset);
 800         __u32 chksum;
 801
 802         chksum = f2fs_crc32(sbi, ckpt, chksum_ofs);
 803         if (chksum_ofs < CP_CHKSUM_OFFSET) {
 804                 chksum_ofs += sizeof(chksum);
 805                 chksum = f2fs_chksum(sbi, chksum, (__u8 *)ckpt + chksum_ofs,
 806                                                 F2FS_BLKSIZE - chksum_ofs);
 807         }
 808         return chksum;
 809 }
 810
 811 static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
 812                 struct f2fs_checkpoint **cp_block, struct page **cp_page,
 813                 unsigned long long *version)
 814 {
 815         size_t crc_offset = 0;
 816         __u32 crc;
 817
 818         *cp_page = f2fs_get_meta_page(sbi, cp_addr);
 819         if (IS_ERR(*cp_page))
 820                 return PTR_ERR(*cp_page);
 821
 822         *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
 823
 824         crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
 825         if (crc_offset < CP_MIN_CHKSUM_OFFSET ||
 826                         crc_offset > CP_CHKSUM_OFFSET) {
 827                 f2fs_put_page(*cp_page, 1);
 828                 f2fs_warn(sbi, "invalid crc_offset: %zu", crc_offset);
 829                 return -EINVAL;
 830         }
 831
 832         crc = f2fs_checkpoint_chksum(sbi, *cp_block);
 833         if (crc != cur_cp_crc(*cp_block)) {
 834                 f2fs_put_page(*cp_page, 1);
 835                 f2fs_warn(sbi, "invalid crc value");
 836                 return -EINVAL;
 837         }
 838
 839         *version = cur_cp_version(*cp_block);
 840         return 0;
 841 }
 842
 843 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
 844                                 block_t cp_addr, unsigned long long *version)
 845 {
 846         struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
 847         struct f2fs_checkpoint *cp_block = NULL;
 848         unsigned long long cur_version = 0, pre_version = 0;
 849         int err;
 850
 851         err = get_checkpoint_version(sbi, cp_addr, &cp_block,
 852                                         &cp_page_1, version);
 853         if (err)
 854                 return NULL;
 855
 856         if (le32_to_cpu(cp_block->cp_pack_total_block_count) >
 857                                         sbi->blocks_per_seg) {
 858                 f2fs_warn(sbi, "invalid cp_pack_total_block_count:%u",
 859                           le32_to_cpu(cp_block->cp_pack_total_block_count));
 860                 goto invalid_cp;
 861         }
 862         pre_version = *version;
 863
 864         cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
 865         err = get_checkpoint_version(sbi, cp_addr, &cp_block,
 866                                         &cp_page_2, version);
 867         if (err)
 868                 goto invalid_cp;
 869         cur_version = *version;
 870
 871         if (cur_version == pre_version) {
 872                 *version = cur_version;
 873                 f2fs_put_page(cp_page_2, 1);
 874                 return cp_page_1;
 875         }
 876         f2fs_put_page(cp_page_2, 1);
 877 invalid_cp:
 878         f2fs_put_page(cp_page_1, 1);
 879         return NULL;
 880 }
 881
 882 int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
 883 {
 884         struct f2fs_checkpoint *cp_block;
 885         struct f2fs_super_block *fsb = sbi->raw_super;
 886         struct page *cp1, *cp2, *cur_page;
 887         unsigned long blk_size = sbi->blocksize;
 888         unsigned long long cp1_version = 0, cp2_version = 0;
 889         unsigned long long cp_start_blk_no;
 890         unsigned int cp_blks = 1 + __cp_payload(sbi);
 891         block_t cp_blk_no;
 892         int i;
 893         int err;
 894
 895         sbi->ckpt = f2fs_kzalloc(sbi, array_size(blk_size, cp_blks),
 896                                  GFP_KERNEL);
 897         if (!sbi->ckpt)
 898                 return -ENOMEM;
 899         /*
 900          * Finding out valid cp block involves read both
 901          * sets( cp pack1 and cp pack 2)
 902          */
 903         cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
 904         cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
 905
 906         /* The second checkpoint pack should start at the next segment */
 907         cp_start_blk_no += ((unsigned long long)1) <<
 908                                 le32_to_cpu(fsb->log_blocks_per_seg);
 909         cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
 910
 911         if (cp1 && cp2) {
 912                 if (ver_after(cp2_version, cp1_version))
 913                         cur_page = cp2;
 914                 else
 915                         cur_page = cp1;
 916         } else if (cp1) {
 917                 cur_page = cp1;
 918         } else if (cp2) {
 919                 cur_page = cp2;
 920         } else {
 921                 err = -EFSCORRUPTED;
 922                 goto fail_no_cp;
 923         }
 924
 925         cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
 926         memcpy(sbi->ckpt, cp_block, blk_size);
 927
 928         if (cur_page == cp1)
 929                 sbi->cur_cp_pack = 1;
 930         else
 931                 sbi->cur_cp_pack = 2;
 932
 933         /* Sanity checking of checkpoint */
 934         if (f2fs_sanity_check_ckpt(sbi)) {
 935                 err = -EFSCORRUPTED;
 936                 goto free_fail_no_cp;
 937         }
 938
 939         if (cp_blks <= 1)
 940                 goto done;
 941
 942         cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
 943         if (cur_page == cp2)
 944                 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
 945
 946         for (i = 1; i < cp_blks; i++) {
 947                 void *sit_bitmap_ptr;
 948                 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
 949
 950                 cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i);
 951                 if (IS_ERR(cur_page)) {
 952                         err = PTR_ERR(cur_page);
 953                         goto free_fail_no_cp;
 954                 }
 955                 sit_bitmap_ptr = page_address(cur_page);
 956                 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
 957                 f2fs_put_page(cur_page, 1);
 958         }
 959 done:
 960         f2fs_put_page(cp1, 1);
 961         f2fs_put_page(cp2, 1);
 962         return 0;
 963
 964 free_fail_no_cp:
 965         f2fs_put_page(cp1, 1);
 966         f2fs_put_page(cp2, 1);
 967 fail_no_cp:
 968         kvfree(sbi->ckpt);
 969         return err;
 970 }
 971
 972 static void __add_dirty_inode(struct inode *inode, enum inode_type type)
 973 {
 974         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 975         int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
 976
 977         if (is_inode_flag_set(inode, flag))
 978                 return;
 979
 980         set_inode_flag(inode, flag);
 981         if (!f2fs_is_volatile_file(inode))
 982                 list_add_tail(&F2FS_I(inode)->dirty_list,
 983                                                 &sbi->inode_list[type]);
 984         stat_inc_dirty_inode(sbi, type);
 985 }
 986
 987 static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
 988 {
 989         int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
 990
 991         if (get_dirty_pages(inode) || !is_inode_flag_set(inode, flag))
 992                 return;
 993
 994         list_del_init(&F2FS_I(inode)->dirty_list);
 995         clear_inode_flag(inode, flag);
 996         stat_dec_dirty_inode(F2FS_I_SB(inode), type);
 997 }
 998
 999 void f2fs_update_dirty_page(struct inode *inode, struct page *page)
1000 {
1001         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1002         enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1003
1004         if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1005                         !S_ISLNK(inode->i_mode))
1006                 return;
1007
1008         spin_lock(&sbi->inode_lock[type]);
1009         if (type != FILE_INODE || test_opt(sbi, DATA_FLUSH))
1010                 __add_dirty_inode(inode, type);
1011         inode_inc_dirty_pages(inode);
1012         spin_unlock(&sbi->inode_lock[type]);
1013
1014         f2fs_set_page_private(page, 0);
1015         f2fs_trace_pid(page);
1016 }
1017
1018 void f2fs_remove_dirty_inode(struct inode *inode)
1019 {
1020         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1021         enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1022
1023         if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1024                         !S_ISLNK(inode->i_mode))
1025                 return;
1026
1027         if (type == FILE_INODE && !test_opt(sbi, DATA_FLUSH))
1028                 return;
1029
1030         spin_lock(&sbi->inode_lock[type]);
1031         __remove_dirty_inode(inode, type);
1032         spin_unlock(&sbi->inode_lock[type]);
1033 }
1034
1035 int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
1036 {
1037         struct list_head *head;
1038         struct inode *inode;
1039         struct f2fs_inode_info *fi;
1040         bool is_dir = (type == DIR_INODE);
1041         unsigned long ino = 0;
1042
1043         trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
1044                                 get_pages(sbi, is_dir ?
1045                                 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1046 retry:
1047         if (unlikely(f2fs_cp_error(sbi)))
1048                 return -EIO;
1049
1050         spin_lock(&sbi->inode_lock[type]);
1051
1052         head = &sbi->inode_list[type];
1053         if (list_empty(head)) {
1054                 spin_unlock(&sbi->inode_lock[type]);
1055                 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
1056                                 get_pages(sbi, is_dir ?
1057                                 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1058                 return 0;
1059         }
1060         fi = list_first_entry(head, struct f2fs_inode_info, dirty_list);
1061         inode = igrab(&fi->vfs_inode);
1062         spin_unlock(&sbi->inode_lock[type]);
1063         if (inode) {
1064                 unsigned long cur_ino = inode->i_ino;
1065
1066                 F2FS_I(inode)->cp_task = current;
1067
1068                 filemap_fdatawrite(inode->i_mapping);
1069
1070                 F2FS_I(inode)->cp_task = NULL;
1071
1072                 iput(inode);
1073                 /* We need to give cpu to another writers. */
1074                 if (ino == cur_ino)
1075                         cond_resched();
1076                 else
1077                         ino = cur_ino;
1078         } else {
1079                 /*
1080                  * We should submit bio, since it exists several
1081                  * wribacking dentry pages in the freeing inode.
1082                  */
1083                 f2fs_submit_merged_write(sbi, DATA);
1084                 cond_resched();
1085         }
1086         goto retry;
1087 }
1088
1089 int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi)
1090 {
1091         struct list_head *head = &sbi->inode_list[DIRTY_META];
1092         struct inode *inode;
1093         struct f2fs_inode_info *fi;
1094         s64 total = get_pages(sbi, F2FS_DIRTY_IMETA);
1095
1096         while (total--) {
1097                 if (unlikely(f2fs_cp_error(sbi)))
1098                         return -EIO;
1099
1100                 spin_lock(&sbi->inode_lock[DIRTY_META]);
1101                 if (list_empty(head)) {
1102                         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1103                         return 0;
1104                 }
1105                 fi = list_first_entry(head, struct f2fs_inode_info,
1106                                                         gdirty_list);
1107                 inode = igrab(&fi->vfs_inode);
1108                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1109                 if (inode) {
1110                         sync_inode_metadata(inode, 0);
1111
1112                         /* it's on eviction */
1113                         if (is_inode_flag_set(inode, FI_DIRTY_INODE))
1114                                 f2fs_update_inode_page(inode);
1115                         iput(inode);
1116                 }
1117         }
1118         return 0;
1119 }
1120
1121 static void __prepare_cp_block(struct f2fs_sb_info *sbi)
1122 {
1123         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1124         struct f2fs_nm_info *nm_i = NM_I(sbi);
1125         nid_t last_nid = nm_i->next_scan_nid;
1126
1127         next_free_nid(sbi, &last_nid);
1128         ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
1129         ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
1130         ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
1131         ckpt->next_free_nid = cpu_to_le32(last_nid);
1132 }
1133
1134 static bool __need_flush_quota(struct f2fs_sb_info *sbi)
1135 {
1136         bool ret = false;
1137
1138         if (!is_journalled_quota(sbi))
1139                 return false;
1140
1141         down_write(&sbi->quota_sem);
1142         if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH)) {
1143                 ret = false;
1144         } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR)) {
1145                 ret = false;
1146         } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH)) {
1147                 clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1148                 ret = true;
1149         } else if (get_pages(sbi, F2FS_DIRTY_QDATA)) {
1150                 ret = true;
1151         }
1152         up_write(&sbi->quota_sem);
1153         return ret;
1154 }
1155
1156 /*
1157  * Freeze all the FS-operations for checkpoint.
1158  */
1159 static int block_operations(struct f2fs_sb_info *sbi)
1160 {
1161         struct writeback_control wbc = {
1162                 .sync_mode = WB_SYNC_ALL,
1163                 .nr_to_write = LONG_MAX,
1164                 .for_reclaim = 0,
1165         };
1166         struct blk_plug plug;
1167         int err = 0, cnt = 0;
1168
1169         blk_start_plug(&plug);
1170
1171 retry_flush_quotas:
1172         f2fs_lock_all(sbi);
1173         if (__need_flush_quota(sbi)) {
1174                 int locked;
1175
1176                 if (++cnt > DEFAULT_RETRY_QUOTA_FLUSH_COUNT) {
1177                         set_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1178                         set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1179                         goto retry_flush_dents;
1180                 }
1181                 f2fs_unlock_all(sbi);
1182
1183                 /* only failed during mount/umount/freeze/quotactl */
1184                 locked = down_read_trylock(&sbi->sb->s_umount);
1185                 f2fs_quota_sync(sbi->sb, -1);
1186                 if (locked)
1187                         up_read(&sbi->sb->s_umount);
1188                 cond_resched();
1189                 goto retry_flush_quotas;
1190         }
1191
1192 retry_flush_dents:
1193         /* write all the dirty dentry pages */
1194         if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
1195                 f2fs_unlock_all(sbi);
1196                 err = f2fs_sync_dirty_inodes(sbi, DIR_INODE);
1197                 if (err)
1198                         goto out;
1199                 cond_resched();
1200                 goto retry_flush_quotas;
1201         }
1202
1203         /*
1204          * POR: we should ensure that there are no dirty node pages
1205          * until finishing nat/sit flush. inode->i_blocks can be updated.
1206          */
1207         down_write(&sbi->node_change);
1208
1209         if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
1210                 up_write(&sbi->node_change);
1211                 f2fs_unlock_all(sbi);
1212                 err = f2fs_sync_inode_meta(sbi);
1213                 if (err)
1214                         goto out;
1215                 cond_resched();
1216                 goto retry_flush_quotas;
1217         }
1218
1219 retry_flush_nodes:
1220         down_write(&sbi->node_write);
1221
1222         if (get_pages(sbi, F2FS_DIRTY_NODES)) {
1223                 up_write(&sbi->node_write);
1224                 atomic_inc(&sbi->wb_sync_req[NODE]);
1225                 err = f2fs_sync_node_pages(sbi, &wbc, false, FS_CP_NODE_IO);
1226                 atomic_dec(&sbi->wb_sync_req[NODE]);
1227                 if (err) {
1228                         up_write(&sbi->node_change);
1229                         f2fs_unlock_all(sbi);
1230                         goto out;
1231                 }
1232                 cond_resched();
1233                 goto retry_flush_nodes;
1234         }
1235
1236         /*
1237          * sbi->node_change is used only for AIO write_begin path which produces
1238          * dirty node blocks and some checkpoint values by block allocation.
1239          */
1240         __prepare_cp_block(sbi);
1241         up_write(&sbi->node_change);
1242 out:
1243         blk_finish_plug(&plug);
1244         return err;
1245 }
1246
1247 static void unblock_operations(struct f2fs_sb_info *sbi)
1248 {
1249         up_write(&sbi->node_write);
1250         f2fs_unlock_all(sbi);
1251 }
1252
1253 void f2fs_wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
1254 {
1255         DEFINE_WAIT(wait);
1256
1257         for (;;) {
1258                 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
1259
1260                 if (!get_pages(sbi, F2FS_WB_CP_DATA))
1261                         break;
1262
1263                 if (unlikely(f2fs_cp_error(sbi)))
1264                         break;
1265
1266                 io_schedule_timeout(5*HZ);
1267         }
1268         finish_wait(&sbi->cp_wait, &wait);
1269 }
1270
1271 static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1272 {
1273         unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
1274         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1275         unsigned long flags;
1276
1277         spin_lock_irqsave(&sbi->cp_lock, flags);
1278
1279         if ((cpc->reason & CP_UMOUNT) &&
1280                         le32_to_cpu(ckpt->cp_pack_total_block_count) >
1281                         sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks)
1282                 disable_nat_bits(sbi, false);
1283
1284         if (cpc->reason & CP_TRIMMED)
1285                 __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1286         else
1287                 __clear_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1288
1289         if (cpc->reason & CP_UMOUNT)
1290                 __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1291         else
1292                 __clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1293
1294         if (cpc->reason & CP_FASTBOOT)
1295                 __set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1296         else
1297                 __clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1298
1299         if (orphan_num)
1300                 __set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1301         else
1302                 __clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1303
1304         if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) ||
1305                 is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
1306                 __set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1307
1308         if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
1309                 __set_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1310         else
1311                 __clear_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1312
1313         if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK))
1314                 __set_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1315         else
1316                 __clear_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1317
1318         if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
1319                 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1320         else
1321                 __clear_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1322
1323         if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR))
1324                 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1325
1326         /* set this flag to activate crc|cp_ver for recovery */
1327         __set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
1328         __clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
1329
1330         spin_unlock_irqrestore(&sbi->cp_lock, flags);
1331 }
1332
1333 static void commit_checkpoint(struct f2fs_sb_info *sbi,
1334         void *src, block_t blk_addr)
1335 {
1336         struct writeback_control wbc = {
1337                 .for_reclaim = 0,
1338         };
1339
1340         /*
1341          * pagevec_lookup_tag and lock_page again will take
1342          * some extra time. Therefore, f2fs_update_meta_pages and
1343          * f2fs_sync_meta_pages are combined in this function.
1344          */
1345         struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
1346         int err;
1347
1348         f2fs_wait_on_page_writeback(page, META, true, true);
1349
1350         memcpy(page_address(page), src, PAGE_SIZE);
1351
1352         set_page_dirty(page);
1353         if (unlikely(!clear_page_dirty_for_io(page)))
1354                 f2fs_bug_on(sbi, 1);
1355
1356         /* writeout cp pack 2 page */
1357         err = __f2fs_write_meta_page(page, &wbc, FS_CP_META_IO);
1358         if (unlikely(err && f2fs_cp_error(sbi))) {
1359                 f2fs_put_page(page, 1);
1360                 return;
1361         }
1362
1363         f2fs_bug_on(sbi, err);
1364         f2fs_put_page(page, 0);
1365
1366         /* submit checkpoint (with barrier if NOBARRIER is not set) */
1367         f2fs_submit_merged_write(sbi, META_FLUSH);
1368 }
1369
1370 static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1371 {
1372         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1373         struct f2fs_nm_info *nm_i = NM_I(sbi);
1374         unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num, flags;
1375         block_t start_blk;
1376         unsigned int data_sum_blocks, orphan_blocks;
1377         __u32 crc32 = 0;
1378         int i;
1379         int cp_payload_blks = __cp_payload(sbi);
1380         struct super_block *sb = sbi->sb;
1381         struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1382         u64 kbytes_written;
1383         int err;
1384
1385         /* Flush all the NAT/SIT pages */
1386         f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1387         f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_META) &&
1388                                         !f2fs_cp_error(sbi));
1389
1390         /*
1391          * modify checkpoint
1392          * version number is already updated
1393          */
1394         ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi, true));
1395         ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
1396         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
1397                 ckpt->cur_node_segno[i] =
1398                         cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
1399                 ckpt->cur_node_blkoff[i] =
1400                         cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
1401                 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
1402                                 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
1403         }
1404         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
1405                 ckpt->cur_data_segno[i] =
1406                         cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
1407                 ckpt->cur_data_blkoff[i] =
1408                         cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
1409                 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
1410                                 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
1411         }
1412
1413         /* 2 cp  + n data seg summary + orphan inode blocks */
1414         data_sum_blocks = f2fs_npages_for_summary_flush(sbi, false);
1415         spin_lock_irqsave(&sbi->cp_lock, flags);
1416         if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
1417                 __set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1418         else
1419                 __clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1420         spin_unlock_irqrestore(&sbi->cp_lock, flags);
1421
1422         orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
1423         ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
1424                         orphan_blocks);
1425
1426         if (__remain_node_summaries(cpc->reason))
1427                 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
1428                                 cp_payload_blks + data_sum_blocks +
1429                                 orphan_blocks + NR_CURSEG_NODE_TYPE);
1430         else
1431                 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
1432                                 cp_payload_blks + data_sum_blocks +
1433                                 orphan_blocks);
1434
1435         /* update ckpt flag for checkpoint */
1436         update_ckpt_flags(sbi, cpc);
1437
1438         /* update SIT/NAT bitmap */
1439         get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1440         get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1441
1442         crc32 = f2fs_checkpoint_chksum(sbi, ckpt);
1443         *((__le32 *)((unsigned char *)ckpt +
1444                                 le32_to_cpu(ckpt->checksum_offset)))
1445                                 = cpu_to_le32(crc32);
1446
1447         start_blk = __start_cp_next_addr(sbi);
1448
1449         /* write nat bits */
1450         if (enabled_nat_bits(sbi, cpc)) {
1451                 __u64 cp_ver = cur_cp_version(ckpt);
1452                 block_t blk;
1453
1454                 cp_ver |= ((__u64)crc32 << 32);
1455                 *(__le64 *)nm_i->nat_bits = cpu_to_le64(cp_ver);
1456
1457                 blk = start_blk + sbi->blocks_per_seg - nm_i->nat_bits_blocks;
1458                 for (i = 0; i < nm_i->nat_bits_blocks; i++)
1459                         f2fs_update_meta_page(sbi, nm_i->nat_bits +
1460                                         (i << F2FS_BLKSIZE_BITS), blk + i);
1461         }
1462
1463         /* write out checkpoint buffer at block 0 */
1464         f2fs_update_meta_page(sbi, ckpt, start_blk++);
1465
1466         for (i = 1; i < 1 + cp_payload_blks; i++)
1467                 f2fs_update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1468                                                         start_blk++);
1469
1470         if (orphan_num) {
1471                 write_orphan_inodes(sbi, start_blk);
1472                 start_blk += orphan_blocks;
1473         }
1474
1475         f2fs_write_data_summaries(sbi, start_blk);
1476         start_blk += data_sum_blocks;
1477
1478         /* Record write statistics in the hot node summary */
1479         kbytes_written = sbi->kbytes_written;
1480         if (sb->s_bdev->bd_part)
1481                 kbytes_written += BD_PART_WRITTEN(sbi);
1482
1483         seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written);
1484
1485         if (__remain_node_summaries(cpc->reason)) {
1486                 f2fs_write_node_summaries(sbi, start_blk);
1487                 start_blk += NR_CURSEG_NODE_TYPE;
1488         }
1489
1490         /* update user_block_counts */
1491         sbi->last_valid_block_count = sbi->total_valid_block_count;
1492         percpu_counter_set(&sbi->alloc_valid_block_count, 0);
1493
1494         /* Here, we have one bio having CP pack except cp pack 2 page */
1495         f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1496         f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_META) &&
1497                                         !f2fs_cp_error(sbi));
1498
1499         /* wait for previous submitted meta pages writeback */
1500         f2fs_wait_on_all_pages_writeback(sbi);
1501
1502         /* flush all device cache */
1503         err = f2fs_flush_device_cache(sbi);
1504         if (err)
1505                 return err;
1506
1507         /* barrier and flush checkpoint cp pack 2 page if it can */
1508         commit_checkpoint(sbi, ckpt, start_blk);
1509         f2fs_wait_on_all_pages_writeback(sbi);
1510
1511         /*
1512          * invalidate intermediate page cache borrowed from meta inode which are
1513          * used for migration of encrypted or verity inode's blocks.
1514          */
1515         if (f2fs_sb_has_encrypt(sbi) || f2fs_sb_has_verity(sbi))
1516                 invalidate_mapping_pages(META_MAPPING(sbi),
1517                                 MAIN_BLKADDR(sbi), MAX_BLKADDR(sbi) - 1);
1518
1519         f2fs_release_ino_entry(sbi, false);
1520
1521         f2fs_reset_fsync_node_info(sbi);
1522
1523         clear_sbi_flag(sbi, SBI_IS_DIRTY);
1524         clear_sbi_flag(sbi, SBI_NEED_CP);
1525         clear_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1526
1527         spin_lock(&sbi->stat_lock);
1528         sbi->unusable_block_count = 0;
1529         spin_unlock(&sbi->stat_lock);
1530
1531         __set_cp_next_pack(sbi);
1532
1533         /*
1534          * redirty superblock if metadata like node page or inode cache is
1535          * updated during writing checkpoint.
1536          */
1537         if (get_pages(sbi, F2FS_DIRTY_NODES) ||
1538                         get_pages(sbi, F2FS_DIRTY_IMETA))
1539                 set_sbi_flag(sbi, SBI_IS_DIRTY);
1540
1541         f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS));
1542
1543         return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0;
1544 }
1545
1546 /*
1547  * We guarantee that this checkpoint procedure will not fail.
1548  */
1549 int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1550 {
1551         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1552         unsigned long long ckpt_ver;
1553         int err = 0;
1554
1555         if (f2fs_readonly(sbi->sb) || f2fs_hw_is_readonly(sbi))
1556                 return -EROFS;
1557
1558         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1559                 if (cpc->reason != CP_PAUSE)
1560                         return 0;
1561                 f2fs_warn(sbi, "Start checkpoint disabled!");
1562         }
1563         mutex_lock(&sbi->cp_mutex);
1564
1565         if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1566                 ((cpc->reason & CP_FASTBOOT) || (cpc->reason & CP_SYNC) ||
1567                 ((cpc->reason & CP_DISCARD) && !sbi->discard_blks)))
1568                 goto out;
1569         if (unlikely(f2fs_cp_error(sbi))) {
1570                 err = -EIO;
1571                 goto out;
1572         }
1573
1574         trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1575
1576         err = block_operations(sbi);
1577         if (err)
1578                 goto out;
1579
1580         trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1581
1582         f2fs_flush_merged_writes(sbi);
1583
1584         /* this is the case of multiple fstrims without any changes */
1585         if (cpc->reason & CP_DISCARD) {
1586                 if (!f2fs_exist_trim_candidates(sbi, cpc)) {
1587                         unblock_operations(sbi);
1588                         goto out;
1589                 }
1590
1591                 if (NM_I(sbi)->dirty_nat_cnt == 0 &&
1592                                 SIT_I(sbi)->dirty_sentries == 0 &&
1593                                 prefree_segments(sbi) == 0) {
1594                         f2fs_flush_sit_entries(sbi, cpc);
1595                         f2fs_clear_prefree_segments(sbi, cpc);
1596                         unblock_operations(sbi);
1597                         goto out;
1598                 }
1599         }
1600
1601         /*
1602          * update checkpoint pack index
1603          * Increase the version number so that
1604          * SIT entries and seg summaries are written at correct place
1605          */
1606         ckpt_ver = cur_cp_version(ckpt);
1607         ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1608
1609         /* write cached NAT/SIT entries to NAT/SIT area */
1610         err = f2fs_flush_nat_entries(sbi, cpc);
1611         if (err)
1612                 goto stop;
1613
1614         f2fs_flush_sit_entries(sbi, cpc);
1615
1616         /* unlock all the fs_lock[] in do_checkpoint() */
1617         err = do_checkpoint(sbi, cpc);
1618         if (err)
1619                 f2fs_release_discard_addrs(sbi);
1620         else
1621                 f2fs_clear_prefree_segments(sbi, cpc);
1622 stop:
1623         unblock_operations(sbi);
1624         stat_inc_cp_count(sbi->stat_info);
1625
1626         if (cpc->reason & CP_RECOVERY)
1627                 f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
1628
1629         /* do checkpoint periodically */
1630         f2fs_update_time(sbi, CP_TIME);
1631         trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1632 out:
1633         mutex_unlock(&sbi->cp_mutex);
1634         return err;
1635 }
1636
1637 void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi)
1638 {
1639         int i;
1640
1641         for (i = 0; i < MAX_INO_ENTRY; i++) {
1642                 struct inode_management *im = &sbi->im[i];
1643
1644                 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1645                 spin_lock_init(&im->ino_lock);
1646                 INIT_LIST_HEAD(&im->ino_list);
1647                 im->ino_num = 0;
1648         }
1649
1650         sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1651                         NR_CURSEG_TYPE - __cp_payload(sbi)) *
1652                                 F2FS_ORPHANS_PER_BLOCK;
1653 }
1654
1655 int __init f2fs_create_checkpoint_caches(void)
1656 {
1657         ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1658                         sizeof(struct ino_entry));
1659         if (!ino_entry_slab)
1660                 return -ENOMEM;
1661         f2fs_inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1662                         sizeof(struct inode_entry));
1663         if (!f2fs_inode_entry_slab) {
1664                 kmem_cache_destroy(ino_entry_slab);
1665                 return -ENOMEM;
1666         }
1667         return 0;
1668 }
1669
1670 void f2fs_destroy_checkpoint_caches(void)
1671 {
1672         kmem_cache_destroy(ino_entry_slab);
1673         kmem_cache_destroy(f2fs_inode_entry_slab);
1674 }