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 static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
  54                                                         bool is_meta)
  55 {
  56         struct address_space *mapping = META_MAPPING(sbi);
  57         struct page *page;
  58         struct f2fs_io_info fio = {
  59                 .sbi = sbi,
  60                 .type = META,
  61                 .op = REQ_OP_READ,
  62                 .op_flags = REQ_META | REQ_PRIO,
  63                 .old_blkaddr = index,
  64                 .new_blkaddr = index,
  65                 .encrypted_page = NULL,
  66                 .is_por = !is_meta,
  67         };
  68         int err;
  69
  70         if (unlikely(!is_meta))
  71                 fio.op_flags &= ~REQ_META;
  72 repeat:
  73         page = f2fs_grab_cache_page(mapping, index, false);
  74         if (!page) {
  75                 cond_resched();
  76                 goto repeat;
  77         }
  78         if (PageUptodate(page))
  79                 goto out;
  80
  81         fio.page = page;
  82
  83         err = f2fs_submit_page_bio(&fio);
  84         if (err) {
  85                 f2fs_put_page(page, 1);
  86                 return ERR_PTR(err);
  87         }
  88
  89         lock_page(page);
  90         if (unlikely(page->mapping != mapping)) {
  91                 f2fs_put_page(page, 1);
  92                 goto repeat;
  93         }
  94
  95         if (unlikely(!PageUptodate(page))) {
  96                 f2fs_put_page(page, 1);
  97                 return ERR_PTR(-EIO);
  98         }
  99 out:
 100         return page;
 101 }
 102
 103 struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
 104 {
 105         return __get_meta_page(sbi, index, true);
 106 }
 107
 108 struct page *f2fs_get_meta_page_nofail(struct f2fs_sb_info *sbi, pgoff_t index)
 109 {
 110         struct page *page;
 111         int count = 0;
 112
 113 retry:
 114         page = __get_meta_page(sbi, index, true);
 115         if (IS_ERR(page)) {
 116                 if (PTR_ERR(page) == -EIO &&
 117                                 ++count <= DEFAULT_RETRY_IO_COUNT)
 118                         goto retry;
 119                 f2fs_stop_checkpoint(sbi, false);
 120         }
 121         return page;
 122 }
 123
 124 /* for POR only */
 125 struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
 126 {
 127         return __get_meta_page(sbi, index, false);
 128 }
 129
 130 static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
 131                                                         int type)
 132 {
 133         struct seg_entry *se;
 134         unsigned int segno, offset;
 135         bool exist;
 136
 137         if (type != DATA_GENERIC_ENHANCE && type != DATA_GENERIC_ENHANCE_READ)
 138                 return true;
 139
 140         segno = GET_SEGNO(sbi, blkaddr);
 141         offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
 142         se = get_seg_entry(sbi, segno);
 143
 144         exist = f2fs_test_bit(offset, se->cur_valid_map);
 145         if (!exist && type == DATA_GENERIC_ENHANCE) {
 146                 f2fs_err(sbi, "Inconsistent error blkaddr:%u, sit bitmap:%d",
 147                          blkaddr, exist);
 148                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 149                 WARN_ON(1);
 150         }
 151         return exist;
 152 }
 153
 154 bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
 155                                         block_t blkaddr, int type)
 156 {
 157         switch (type) {
 158         case META_NAT:
 159                 break;
 160         case META_SIT:
 161                 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
 162                         return false;
 163                 break;
 164         case META_SSA:
 165                 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
 166                         blkaddr < SM_I(sbi)->ssa_blkaddr))
 167                         return false;
 168                 break;
 169         case META_CP:
 170                 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
 171                         blkaddr < __start_cp_addr(sbi)))
 172                         return false;
 173                 break;
 174         case META_POR:
 175                 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
 176                         blkaddr < MAIN_BLKADDR(sbi)))
 177                         return false;
 178                 break;
 179         case DATA_GENERIC:
 180         case DATA_GENERIC_ENHANCE:
 181         case DATA_GENERIC_ENHANCE_READ:
 182                 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
 183                                 blkaddr < MAIN_BLKADDR(sbi))) {
 184                         f2fs_warn(sbi, "access invalid blkaddr:%u",
 185                                   blkaddr);
 186                         set_sbi_flag(sbi, SBI_NEED_FSCK);
 187                         WARN_ON(1);
 188                         return false;
 189                 } else {
 190                         return __is_bitmap_valid(sbi, blkaddr, type);
 191                 }
 192                 break;
 193         case META_GENERIC:
 194                 if (unlikely(blkaddr < SEG0_BLKADDR(sbi) ||
 195                         blkaddr >= MAIN_BLKADDR(sbi)))
 196                         return false;
 197                 break;
 198         default:
 199                 BUG();
 200         }
 201
 202         return true;
 203 }
 204
 205 /*
 206  * Readahead CP/NAT/SIT/SSA/POR pages
 207  */
 208 int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
 209                                                         int type, bool sync)
 210 {
 211         struct page *page;
 212         block_t blkno = start;
 213         struct f2fs_io_info fio = {
 214                 .sbi = sbi,
 215                 .type = META,
 216                 .op = REQ_OP_READ,
 217                 .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
 218                 .encrypted_page = NULL,
 219                 .in_list = false,
 220                 .is_por = (type == META_POR),
 221         };
 222         struct blk_plug plug;
 223
 224         if (unlikely(type == META_POR))
 225                 fio.op_flags &= ~REQ_META;
 226
 227         blk_start_plug(&plug);
 228         for (; nrpages-- > 0; blkno++) {
 229
 230                 if (!f2fs_is_valid_blkaddr(sbi, blkno, type))
 231                         goto out;
 232
 233                 switch (type) {
 234                 case META_NAT:
 235                         if (unlikely(blkno >=
 236                                         NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
 237                                 blkno = 0;
 238                         /* get nat block addr */
 239                         fio.new_blkaddr = current_nat_addr(sbi,
 240                                         blkno * NAT_ENTRY_PER_BLOCK);
 241                         break;
 242                 case META_SIT:
 243                         /* get sit block addr */
 244                         fio.new_blkaddr = current_sit_addr(sbi,
 245                                         blkno * SIT_ENTRY_PER_BLOCK);
 246                         break;
 247                 case META_SSA:
 248                 case META_CP:
 249                 case META_POR:
 250                         fio.new_blkaddr = blkno;
 251                         break;
 252                 default:
 253                         BUG();
 254                 }
 255
 256                 page = f2fs_grab_cache_page(META_MAPPING(sbi),
 257                                                 fio.new_blkaddr, false);
 258                 if (!page)
 259                         continue;
 260                 if (PageUptodate(page)) {
 261                         f2fs_put_page(page, 1);
 262                         continue;
 263                 }
 264
 265                 fio.page = page;
 266                 f2fs_submit_page_bio(&fio);
 267                 f2fs_put_page(page, 0);
 268         }
 269 out:
 270         blk_finish_plug(&plug);
 271         return blkno - start;
 272 }
 273
 274 void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
 275 {
 276         struct page *page;
 277         bool readahead = false;
 278
 279         page = find_get_page(META_MAPPING(sbi), index);
 280         if (!page || !PageUptodate(page))
 281                 readahead = true;
 282         f2fs_put_page(page, 0);
 283
 284         if (readahead)
 285                 f2fs_ra_meta_pages(sbi, index, BIO_MAX_PAGES, META_POR, true);
 286 }
 287
 288 static int __f2fs_write_meta_page(struct page *page,
 289                                 struct writeback_control *wbc,
 290                                 enum iostat_type io_type)
 291 {
 292         struct f2fs_sb_info *sbi = F2FS_P_SB(page);
 293
 294         trace_f2fs_writepage(page, META);
 295
 296         if (unlikely(f2fs_cp_error(sbi)))
 297                 goto redirty_out;
 298         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
 299                 goto redirty_out;
 300         if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
 301                 goto redirty_out;
 302
 303         f2fs_do_write_meta_page(sbi, page, io_type);
 304         dec_page_count(sbi, F2FS_DIRTY_META);
 305
 306         if (wbc->for_reclaim)
 307                 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, META);
 308
 309         unlock_page(page);
 310
 311         if (unlikely(f2fs_cp_error(sbi)))
 312                 f2fs_submit_merged_write(sbi, META);
 313
 314         return 0;
 315
 316 redirty_out:
 317         redirty_page_for_writepage(wbc, page);
 318         return AOP_WRITEPAGE_ACTIVATE;
 319 }
 320
 321 static int f2fs_write_meta_page(struct page *page,
 322                                 struct writeback_control *wbc)
 323 {
 324         return __f2fs_write_meta_page(page, wbc, FS_META_IO);
 325 }
 326
 327 static int f2fs_write_meta_pages(struct address_space *mapping,
 328                                 struct writeback_control *wbc)
 329 {
 330         struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
 331         long diff, written;
 332
 333         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
 334                 goto skip_write;
 335
 336         /* collect a number of dirty meta pages and write together */
 337         if (wbc->sync_mode != WB_SYNC_ALL &&
 338                         get_pages(sbi, F2FS_DIRTY_META) <
 339                                         nr_pages_to_skip(sbi, META))
 340                 goto skip_write;
 341
 342         /* if locked failed, cp will flush dirty pages instead */
 343         if (!mutex_trylock(&sbi->cp_mutex))
 344                 goto skip_write;
 345
 346         trace_f2fs_writepages(mapping->host, wbc, META);
 347         diff = nr_pages_to_write(sbi, META, wbc);
 348         written = f2fs_sync_meta_pages(sbi, META, wbc->nr_to_write, FS_META_IO);
 349         mutex_unlock(&sbi->cp_mutex);
 350         wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
 351         return 0;
 352
 353 skip_write:
 354         wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
 355         trace_f2fs_writepages(mapping->host, wbc, META);
 356         return 0;
 357 }
 358
 359 long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
 360                                 long nr_to_write, enum iostat_type io_type)
 361 {
 362         struct address_space *mapping = META_MAPPING(sbi);
 363         pgoff_t index = 0, prev = ULONG_MAX;
 364         struct pagevec pvec;
 365         long nwritten = 0;
 366         int nr_pages;
 367         struct writeback_control wbc = {
 368                 .for_reclaim = 0,
 369         };
 370         struct blk_plug plug;
 371
 372         pagevec_init(&pvec);
 373
 374         blk_start_plug(&plug);
 375
 376         while ((nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
 377                                 PAGECACHE_TAG_DIRTY))) {
 378                 int i;
 379
 380                 for (i = 0; i < nr_pages; i++) {
 381                         struct page *page = pvec.pages[i];
 382
 383                         if (prev == ULONG_MAX)
 384                                 prev = page->index - 1;
 385                         if (nr_to_write != LONG_MAX && page->index != prev + 1) {
 386                                 pagevec_release(&pvec);
 387                                 goto stop;
 388                         }
 389
 390                         lock_page(page);
 391
 392                         if (unlikely(page->mapping != mapping)) {
 393 continue_unlock:
 394                                 unlock_page(page);
 395                                 continue;
 396                         }
 397                         if (!PageDirty(page)) {
 398                                 /* someone wrote it for us */
 399                                 goto continue_unlock;
 400                         }
 401
 402                         f2fs_wait_on_page_writeback(page, META, true, true);
 403
 404                         if (!clear_page_dirty_for_io(page))
 405                                 goto continue_unlock;
 406
 407                         if (__f2fs_write_meta_page(page, &wbc, io_type)) {
 408                                 unlock_page(page);
 409                                 break;
 410                         }
 411                         nwritten++;
 412                         prev = page->index;
 413                         if (unlikely(nwritten >= nr_to_write))
 414                                 break;
 415                 }
 416                 pagevec_release(&pvec);
 417                 cond_resched();
 418         }
 419 stop:
 420         if (nwritten)
 421                 f2fs_submit_merged_write(sbi, type);
 422
 423         blk_finish_plug(&plug);
 424
 425         return nwritten;
 426 }
 427
 428 static int f2fs_set_meta_page_dirty(struct page *page)
 429 {
 430         trace_f2fs_set_page_dirty(page, META);
 431
 432         if (!PageUptodate(page))
 433                 SetPageUptodate(page);
 434         if (!PageDirty(page)) {
 435                 __set_page_dirty_nobuffers(page);
 436                 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
 437                 f2fs_set_page_private(page, 0);
 438                 f2fs_trace_pid(page);
 439                 return 1;
 440         }
 441         return 0;
 442 }
 443
 444 const struct address_space_operations f2fs_meta_aops = {
 445         .writepage      = f2fs_write_meta_page,
 446         .writepages     = f2fs_write_meta_pages,
 447         .set_page_dirty = f2fs_set_meta_page_dirty,
 448         .invalidatepage = f2fs_invalidate_page,
 449         .releasepage    = f2fs_release_page,
 450 #ifdef CONFIG_MIGRATION
 451         .migratepage    = f2fs_migrate_page,
 452 #endif
 453 };
 454
 455 static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
 456                                                 unsigned int devidx, int type)
 457 {
 458         struct inode_management *im = &sbi->im[type];
 459         struct ino_entry *e, *tmp;
 460
 461         tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
 462
 463         radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
 464
 465         spin_lock(&im->ino_lock);
 466         e = radix_tree_lookup(&im->ino_root, ino);
 467         if (!e) {
 468                 e = tmp;
 469                 if (unlikely(radix_tree_insert(&im->ino_root, ino, e)))
 470                         f2fs_bug_on(sbi, 1);
 471
 472                 memset(e, 0, sizeof(struct ino_entry));
 473                 e->ino = ino;
 474
 475                 list_add_tail(&e->list, &im->ino_list);
 476                 if (type != ORPHAN_INO)
 477                         im->ino_num++;
 478         }
 479
 480         if (type == FLUSH_INO)
 481                 f2fs_set_bit(devidx, (char *)&e->dirty_device);
 482
 483         spin_unlock(&im->ino_lock);
 484         radix_tree_preload_end();
 485
 486         if (e != tmp)
 487                 kmem_cache_free(ino_entry_slab, tmp);
 488 }
 489
 490 static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
 491 {
 492         struct inode_management *im = &sbi->im[type];
 493         struct ino_entry *e;
 494
 495         spin_lock(&im->ino_lock);
 496         e = radix_tree_lookup(&im->ino_root, ino);
 497         if (e) {
 498                 list_del(&e->list);
 499                 radix_tree_delete(&im->ino_root, ino);
 500                 im->ino_num--;
 501                 spin_unlock(&im->ino_lock);
 502                 kmem_cache_free(ino_entry_slab, e);
 503                 return;
 504         }
 505         spin_unlock(&im->ino_lock);
 506 }
 507
 508 void f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
 509 {
 510         /* add new dirty ino entry into list */
 511         __add_ino_entry(sbi, ino, 0, type);
 512 }
 513
 514 void f2fs_remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
 515 {
 516         /* remove dirty ino entry from list */
 517         __remove_ino_entry(sbi, ino, type);
 518 }
 519
 520 /* mode should be APPEND_INO or UPDATE_INO */
 521 bool f2fs_exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
 522 {
 523         struct inode_management *im = &sbi->im[mode];
 524         struct ino_entry *e;
 525
 526         spin_lock(&im->ino_lock);
 527         e = radix_tree_lookup(&im->ino_root, ino);
 528         spin_unlock(&im->ino_lock);
 529         return e ? true : false;
 530 }
 531
 532 void f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all)
 533 {
 534         struct ino_entry *e, *tmp;
 535         int i;
 536
 537         for (i = all ? ORPHAN_INO : APPEND_INO; i < MAX_INO_ENTRY; i++) {
 538                 struct inode_management *im = &sbi->im[i];
 539
 540                 spin_lock(&im->ino_lock);
 541                 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
 542                         list_del(&e->list);
 543                         radix_tree_delete(&im->ino_root, e->ino);
 544                         kmem_cache_free(ino_entry_slab, e);
 545                         im->ino_num--;
 546                 }
 547                 spin_unlock(&im->ino_lock);
 548         }
 549 }
 550
 551 void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
 552                                         unsigned int devidx, int type)
 553 {
 554         __add_ino_entry(sbi, ino, devidx, type);
 555 }
 556
 557 bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
 558                                         unsigned int devidx, int type)
 559 {
 560         struct inode_management *im = &sbi->im[type];
 561         struct ino_entry *e;
 562         bool is_dirty = false;
 563
 564         spin_lock(&im->ino_lock);
 565         e = radix_tree_lookup(&im->ino_root, ino);
 566         if (e && f2fs_test_bit(devidx, (char *)&e->dirty_device))
 567                 is_dirty = true;
 568         spin_unlock(&im->ino_lock);
 569         return is_dirty;
 570 }
 571
 572 int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi)
 573 {
 574         struct inode_management *im = &sbi->im[ORPHAN_INO];
 575         int err = 0;
 576
 577         spin_lock(&im->ino_lock);
 578
 579         if (time_to_inject(sbi, FAULT_ORPHAN)) {
 580                 spin_unlock(&im->ino_lock);
 581                 f2fs_show_injection_info(sbi, FAULT_ORPHAN);
 582                 return -ENOSPC;
 583         }
 584
 585         if (unlikely(im->ino_num >= sbi->max_orphans))
 586                 err = -ENOSPC;
 587         else
 588                 im->ino_num++;
 589         spin_unlock(&im->ino_lock);
 590
 591         return err;
 592 }
 593
 594 void f2fs_release_orphan_inode(struct f2fs_sb_info *sbi)
 595 {
 596         struct inode_management *im = &sbi->im[ORPHAN_INO];
 597
 598         spin_lock(&im->ino_lock);
 599         f2fs_bug_on(sbi, im->ino_num == 0);
 600         im->ino_num--;
 601         spin_unlock(&im->ino_lock);
 602 }
 603
 604 void f2fs_add_orphan_inode(struct inode *inode)
 605 {
 606         /* add new orphan ino entry into list */
 607         __add_ino_entry(F2FS_I_SB(inode), inode->i_ino, 0, ORPHAN_INO);
 608         f2fs_update_inode_page(inode);
 609 }
 610
 611 void f2fs_remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
 612 {
 613         /* remove orphan entry from orphan list */
 614         __remove_ino_entry(sbi, ino, ORPHAN_INO);
 615 }
 616
 617 static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
 618 {
 619         struct inode *inode;
 620         struct node_info ni;
 621         int err;
 622
 623         inode = f2fs_iget_retry(sbi->sb, ino);
 624         if (IS_ERR(inode)) {
 625                 /*
 626                  * there should be a bug that we can't find the entry
 627                  * to orphan inode.
 628                  */
 629                 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
 630                 return PTR_ERR(inode);
 631         }
 632
 633         err = dquot_initialize(inode);
 634         if (err) {
 635                 iput(inode);
 636                 goto err_out;
 637         }
 638
 639         clear_nlink(inode);
 640
 641         /* truncate all the data during iput */
 642         iput(inode);
 643
 644         err = f2fs_get_node_info(sbi, ino, &ni);
 645         if (err)
 646                 goto err_out;
 647
 648         /* ENOMEM was fully retried in f2fs_evict_inode. */
 649         if (ni.blk_addr != NULL_ADDR) {
 650                 err = -EIO;
 651                 goto err_out;
 652         }
 653         return 0;
 654
 655 err_out:
 656         set_sbi_flag(sbi, SBI_NEED_FSCK);
 657         f2fs_warn(sbi, "%s: orphan failed (ino=%x), run fsck to fix.",
 658                   __func__, ino);
 659         return err;
 660 }
 661
 662 int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
 663 {
 664         block_t start_blk, orphan_blocks, i, j;
 665         unsigned int s_flags = sbi->sb->s_flags;
 666         int err = 0;
 667 #ifdef CONFIG_QUOTA
 668         int quota_enabled;
 669 #endif
 670
 671         if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
 672                 return 0;
 673
 674         if (bdev_read_only(sbi->sb->s_bdev)) {
 675                 f2fs_info(sbi, "write access unavailable, skipping orphan cleanup");
 676                 return 0;
 677         }
 678
 679         if (s_flags & SB_RDONLY) {
 680                 f2fs_info(sbi, "orphan cleanup on readonly fs");
 681                 sbi->sb->s_flags &= ~SB_RDONLY;
 682         }
 683
 684 #ifdef CONFIG_QUOTA
 685         /* Needed for iput() to work correctly and not trash data */
 686         sbi->sb->s_flags |= SB_ACTIVE;
 687
 688         /*
 689          * Turn on quotas which were not enabled for read-only mounts if
 690          * filesystem has quota feature, so that they are updated correctly.
 691          */
 692         quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
 693 #endif
 694
 695         start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
 696         orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
 697
 698         f2fs_ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
 699
 700         for (i = 0; i < orphan_blocks; i++) {
 701                 struct page *page;
 702                 struct f2fs_orphan_block *orphan_blk;
 703
 704                 page = f2fs_get_meta_page(sbi, start_blk + i);
 705                 if (IS_ERR(page)) {
 706                         err = PTR_ERR(page);
 707                         goto out;
 708                 }
 709
 710                 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
 711                 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
 712                         nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
 713                         err = recover_orphan_inode(sbi, ino);
 714                         if (err) {
 715                                 f2fs_put_page(page, 1);
 716                                 goto out;
 717                         }
 718                 }
 719                 f2fs_put_page(page, 1);
 720         }
 721         /* clear Orphan Flag */
 722         clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG);
 723 out:
 724         set_sbi_flag(sbi, SBI_IS_RECOVERED);
 725
 726 #ifdef CONFIG_QUOTA
 727         /* Turn quotas off */
 728         if (quota_enabled)
 729                 f2fs_quota_off_umount(sbi->sb);
 730 #endif
 731         sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
 732
 733         return err;
 734 }
 735
 736 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
 737 {
 738         struct list_head *head;
 739         struct f2fs_orphan_block *orphan_blk = NULL;
 740         unsigned int nentries = 0;
 741         unsigned short index = 1;
 742         unsigned short orphan_blocks;
 743         struct page *page = NULL;
 744         struct ino_entry *orphan = NULL;
 745         struct inode_management *im = &sbi->im[ORPHAN_INO];
 746
 747         orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
 748
 749         /*
 750          * we don't need to do spin_lock(&im->ino_lock) here, since all the
 751          * orphan inode operations are covered under f2fs_lock_op().
 752          * And, spin_lock should be avoided due to page operations below.
 753          */
 754         head = &im->ino_list;
 755
 756         /* loop for each orphan inode entry and write them in Jornal block */
 757         list_for_each_entry(orphan, head, list) {
 758                 if (!page) {
 759                         page = f2fs_grab_meta_page(sbi, start_blk++);
 760                         orphan_blk =
 761                                 (struct f2fs_orphan_block *)page_address(page);
 762                         memset(orphan_blk, 0, sizeof(*orphan_blk));
 763                 }
 764
 765                 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
 766
 767                 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
 768                         /*
 769                          * an orphan block is full of 1020 entries,
 770                          * then we need to flush current orphan blocks
 771                          * and bring another one in memory
 772                          */
 773                         orphan_blk->blk_addr = cpu_to_le16(index);
 774                         orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
 775                         orphan_blk->entry_count = cpu_to_le32(nentries);
 776                         set_page_dirty(page);
 777                         f2fs_put_page(page, 1);
 778                         index++;
 779                         nentries = 0;
 780                         page = NULL;
 781                 }
 782         }
 783
 784         if (page) {
 785                 orphan_blk->blk_addr = cpu_to_le16(index);
 786                 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
 787                 orphan_blk->entry_count = cpu_to_le32(nentries);
 788                 set_page_dirty(page);
 789                 f2fs_put_page(page, 1);
 790         }
 791 }
 792
 793 static __u32 f2fs_checkpoint_chksum(struct f2fs_sb_info *sbi,
 794                                                 struct f2fs_checkpoint *ckpt)
 795 {
 796         unsigned int chksum_ofs = le32_to_cpu(ckpt->checksum_offset);
 797         __u32 chksum;
 798
 799         chksum = f2fs_crc32(sbi, ckpt, chksum_ofs);
 800         if (chksum_ofs < CP_CHKSUM_OFFSET) {
 801                 chksum_ofs += sizeof(chksum);
 802                 chksum = f2fs_chksum(sbi, chksum, (__u8 *)ckpt + chksum_ofs,
 803                                                 F2FS_BLKSIZE - chksum_ofs);
 804         }
 805         return chksum;
 806 }
 807
 808 static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
 809                 struct f2fs_checkpoint **cp_block, struct page **cp_page,
 810                 unsigned long long *version)
 811 {
 812         size_t crc_offset = 0;
 813         __u32 crc;
 814
 815         *cp_page = f2fs_get_meta_page(sbi, cp_addr);
 816         if (IS_ERR(*cp_page))
 817                 return PTR_ERR(*cp_page);
 818
 819         *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
 820
 821         crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
 822         if (crc_offset < CP_MIN_CHKSUM_OFFSET ||
 823                         crc_offset > CP_CHKSUM_OFFSET) {
 824                 f2fs_put_page(*cp_page, 1);
 825                 f2fs_warn(sbi, "invalid crc_offset: %zu", crc_offset);
 826                 return -EINVAL;
 827         }
 828
 829         crc = f2fs_checkpoint_chksum(sbi, *cp_block);
 830         if (crc != cur_cp_crc(*cp_block)) {
 831                 f2fs_put_page(*cp_page, 1);
 832                 f2fs_warn(sbi, "invalid crc value");
 833                 return -EINVAL;
 834         }
 835
 836         *version = cur_cp_version(*cp_block);
 837         return 0;
 838 }
 839
 840 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
 841                                 block_t cp_addr, unsigned long long *version)
 842 {
 843         struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
 844         struct f2fs_checkpoint *cp_block = NULL;
 845         unsigned long long cur_version = 0, pre_version = 0;
 846         int err;
 847
 848         err = get_checkpoint_version(sbi, cp_addr, &cp_block,
 849                                         &cp_page_1, version);
 850         if (err)
 851                 return NULL;
 852
 853         if (le32_to_cpu(cp_block->cp_pack_total_block_count) >
 854                                         sbi->blocks_per_seg) {
 855                 f2fs_warn(sbi, "invalid cp_pack_total_block_count:%u",
 856                           le32_to_cpu(cp_block->cp_pack_total_block_count));
 857                 goto invalid_cp;
 858         }
 859         pre_version = *version;
 860
 861         cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
 862         err = get_checkpoint_version(sbi, cp_addr, &cp_block,
 863                                         &cp_page_2, version);
 864         if (err)
 865                 goto invalid_cp;
 866         cur_version = *version;
 867
 868         if (cur_version == pre_version) {
 869                 *version = cur_version;
 870                 f2fs_put_page(cp_page_2, 1);
 871                 return cp_page_1;
 872         }
 873         f2fs_put_page(cp_page_2, 1);
 874 invalid_cp:
 875         f2fs_put_page(cp_page_1, 1);
 876         return NULL;
 877 }
 878
 879 int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
 880 {
 881         struct f2fs_checkpoint *cp_block;
 882         struct f2fs_super_block *fsb = sbi->raw_super;
 883         struct page *cp1, *cp2, *cur_page;
 884         unsigned long blk_size = sbi->blocksize;
 885         unsigned long long cp1_version = 0, cp2_version = 0;
 886         unsigned long long cp_start_blk_no;
 887         unsigned int cp_blks = 1 + __cp_payload(sbi);
 888         block_t cp_blk_no;
 889         int i;
 890         int err;
 891
 892         sbi->ckpt = f2fs_kzalloc(sbi, array_size(blk_size, cp_blks),
 893                                  GFP_KERNEL);
 894         if (!sbi->ckpt)
 895                 return -ENOMEM;
 896         /*
 897          * Finding out valid cp block involves read both
 898          * sets( cp pack 1 and cp pack 2)
 899          */
 900         cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
 901         cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
 902
 903         /* The second checkpoint pack should start at the next segment */
 904         cp_start_blk_no += ((unsigned long long)1) <<
 905                                 le32_to_cpu(fsb->log_blocks_per_seg);
 906         cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
 907
 908         if (cp1 && cp2) {
 909                 if (ver_after(cp2_version, cp1_version))
 910                         cur_page = cp2;
 911                 else
 912                         cur_page = cp1;
 913         } else if (cp1) {
 914                 cur_page = cp1;
 915         } else if (cp2) {
 916                 cur_page = cp2;
 917         } else {
 918                 err = -EFSCORRUPTED;
 919                 goto fail_no_cp;
 920         }
 921
 922         cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
 923         memcpy(sbi->ckpt, cp_block, blk_size);
 924
 925         if (cur_page == cp1)
 926                 sbi->cur_cp_pack = 1;
 927         else
 928                 sbi->cur_cp_pack = 2;
 929
 930         /* Sanity checking of checkpoint */
 931         if (f2fs_sanity_check_ckpt(sbi)) {
 932                 err = -EFSCORRUPTED;
 933                 goto free_fail_no_cp;
 934         }
 935
 936         if (cp_blks <= 1)
 937                 goto done;
 938
 939         cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
 940         if (cur_page == cp2)
 941                 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
 942
 943         for (i = 1; i < cp_blks; i++) {
 944                 void *sit_bitmap_ptr;
 945                 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
 946
 947                 cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i);
 948                 if (IS_ERR(cur_page)) {
 949                         err = PTR_ERR(cur_page);
 950                         goto free_fail_no_cp;
 951                 }
 952                 sit_bitmap_ptr = page_address(cur_page);
 953                 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
 954                 f2fs_put_page(cur_page, 1);
 955         }
 956 done:
 957         f2fs_put_page(cp1, 1);
 958         f2fs_put_page(cp2, 1);
 959         return 0;
 960
 961 free_fail_no_cp:
 962         f2fs_put_page(cp1, 1);
 963         f2fs_put_page(cp2, 1);
 964 fail_no_cp:
 965         kvfree(sbi->ckpt);
 966         return err;
 967 }
 968
 969 static void __add_dirty_inode(struct inode *inode, enum inode_type type)
 970 {
 971         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 972         int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
 973
 974         if (is_inode_flag_set(inode, flag))
 975                 return;
 976
 977         set_inode_flag(inode, flag);
 978         if (!f2fs_is_volatile_file(inode))
 979                 list_add_tail(&F2FS_I(inode)->dirty_list,
 980                                                 &sbi->inode_list[type]);
 981         stat_inc_dirty_inode(sbi, type);
 982 }
 983
 984 static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
 985 {
 986         int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
 987
 988         if (get_dirty_pages(inode) || !is_inode_flag_set(inode, flag))
 989                 return;
 990
 991         list_del_init(&F2FS_I(inode)->dirty_list);
 992         clear_inode_flag(inode, flag);
 993         stat_dec_dirty_inode(F2FS_I_SB(inode), type);
 994 }
 995
 996 void f2fs_update_dirty_page(struct inode *inode, struct page *page)
 997 {
 998         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 999         enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1000
1001         if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1002                         !S_ISLNK(inode->i_mode))
1003                 return;
1004
1005         spin_lock(&sbi->inode_lock[type]);
1006         if (type != FILE_INODE || test_opt(sbi, DATA_FLUSH))
1007                 __add_dirty_inode(inode, type);
1008         inode_inc_dirty_pages(inode);
1009         spin_unlock(&sbi->inode_lock[type]);
1010
1011         f2fs_set_page_private(page, 0);
1012         f2fs_trace_pid(page);
1013 }
1014
1015 void f2fs_remove_dirty_inode(struct inode *inode)
1016 {
1017         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1018         enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1019
1020         if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1021                         !S_ISLNK(inode->i_mode))
1022                 return;
1023
1024         if (type == FILE_INODE && !test_opt(sbi, DATA_FLUSH))
1025                 return;
1026
1027         spin_lock(&sbi->inode_lock[type]);
1028         __remove_dirty_inode(inode, type);
1029         spin_unlock(&sbi->inode_lock[type]);
1030 }
1031
1032 int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
1033 {
1034         struct list_head *head;
1035         struct inode *inode;
1036         struct f2fs_inode_info *fi;
1037         bool is_dir = (type == DIR_INODE);
1038         unsigned long ino = 0;
1039
1040         trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
1041                                 get_pages(sbi, is_dir ?
1042                                 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1043 retry:
1044         if (unlikely(f2fs_cp_error(sbi)))
1045                 return -EIO;
1046
1047         spin_lock(&sbi->inode_lock[type]);
1048
1049         head = &sbi->inode_list[type];
1050         if (list_empty(head)) {
1051                 spin_unlock(&sbi->inode_lock[type]);
1052                 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
1053                                 get_pages(sbi, is_dir ?
1054                                 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1055                 return 0;
1056         }
1057         fi = list_first_entry(head, struct f2fs_inode_info, dirty_list);
1058         inode = igrab(&fi->vfs_inode);
1059         spin_unlock(&sbi->inode_lock[type]);
1060         if (inode) {
1061                 unsigned long cur_ino = inode->i_ino;
1062
1063                 F2FS_I(inode)->cp_task = current;
1064
1065                 filemap_fdatawrite(inode->i_mapping);
1066
1067                 F2FS_I(inode)->cp_task = NULL;
1068
1069                 iput(inode);
1070                 /* We need to give cpu to another writers. */
1071                 if (ino == cur_ino)
1072                         cond_resched();
1073                 else
1074                         ino = cur_ino;
1075         } else {
1076                 /*
1077                  * We should submit bio, since it exists several
1078                  * wribacking dentry pages in the freeing inode.
1079                  */
1080                 f2fs_submit_merged_write(sbi, DATA);
1081                 cond_resched();
1082         }
1083         goto retry;
1084 }
1085
1086 int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi)
1087 {
1088         struct list_head *head = &sbi->inode_list[DIRTY_META];
1089         struct inode *inode;
1090         struct f2fs_inode_info *fi;
1091         s64 total = get_pages(sbi, F2FS_DIRTY_IMETA);
1092
1093         while (total--) {
1094                 if (unlikely(f2fs_cp_error(sbi)))
1095                         return -EIO;
1096
1097                 spin_lock(&sbi->inode_lock[DIRTY_META]);
1098                 if (list_empty(head)) {
1099                         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1100                         return 0;
1101                 }
1102                 fi = list_first_entry(head, struct f2fs_inode_info,
1103                                                         gdirty_list);
1104                 inode = igrab(&fi->vfs_inode);
1105                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1106                 if (inode) {
1107                         sync_inode_metadata(inode, 0);
1108
1109                         /* it's on eviction */
1110                         if (is_inode_flag_set(inode, FI_DIRTY_INODE))
1111                                 f2fs_update_inode_page(inode);
1112                         iput(inode);
1113                 }
1114         }
1115         return 0;
1116 }
1117
1118 static void __prepare_cp_block(struct f2fs_sb_info *sbi)
1119 {
1120         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1121         struct f2fs_nm_info *nm_i = NM_I(sbi);
1122         nid_t last_nid = nm_i->next_scan_nid;
1123
1124         next_free_nid(sbi, &last_nid);
1125         ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
1126         ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
1127         ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
1128         ckpt->next_free_nid = cpu_to_le32(last_nid);
1129 }
1130
1131 static bool __need_flush_quota(struct f2fs_sb_info *sbi)
1132 {
1133         bool ret = false;
1134
1135         if (!is_journalled_quota(sbi))
1136                 return false;
1137
1138         down_write(&sbi->quota_sem);
1139         if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH)) {
1140                 ret = false;
1141         } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR)) {
1142                 ret = false;
1143         } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH)) {
1144                 clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1145                 ret = true;
1146         } else if (get_pages(sbi, F2FS_DIRTY_QDATA)) {
1147                 ret = true;
1148         }
1149         up_write(&sbi->quota_sem);
1150         return ret;
1151 }
1152
1153 /*
1154  * Freeze all the FS-operations for checkpoint.
1155  */
1156 static int block_operations(struct f2fs_sb_info *sbi)
1157 {
1158         struct writeback_control wbc = {
1159                 .sync_mode = WB_SYNC_ALL,
1160                 .nr_to_write = LONG_MAX,
1161                 .for_reclaim = 0,
1162         };
1163         struct blk_plug plug;
1164         int err = 0, cnt = 0;
1165
1166         blk_start_plug(&plug);
1167
1168 retry_flush_quotas:
1169         f2fs_lock_all(sbi);
1170         if (__need_flush_quota(sbi)) {
1171                 int locked;
1172
1173                 if (++cnt > DEFAULT_RETRY_QUOTA_FLUSH_COUNT) {
1174                         set_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1175                         set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1176                         goto retry_flush_dents;
1177                 }
1178                 f2fs_unlock_all(sbi);
1179
1180                 /* only failed during mount/umount/freeze/quotactl */
1181                 locked = down_read_trylock(&sbi->sb->s_umount);
1182                 f2fs_quota_sync(sbi->sb, -1);
1183                 if (locked)
1184                         up_read(&sbi->sb->s_umount);
1185                 cond_resched();
1186                 goto retry_flush_quotas;
1187         }
1188
1189 retry_flush_dents:
1190         /* write all the dirty dentry pages */
1191         if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
1192                 f2fs_unlock_all(sbi);
1193                 err = f2fs_sync_dirty_inodes(sbi, DIR_INODE);
1194                 if (err)
1195                         goto out;
1196                 cond_resched();
1197                 goto retry_flush_quotas;
1198         }
1199
1200         /*
1201          * POR: we should ensure that there are no dirty node pages
1202          * until finishing nat/sit flush. inode->i_blocks can be updated.
1203          */
1204         down_write(&sbi->node_change);
1205
1206         if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
1207                 up_write(&sbi->node_change);
1208                 f2fs_unlock_all(sbi);
1209                 err = f2fs_sync_inode_meta(sbi);
1210                 if (err)
1211                         goto out;
1212                 cond_resched();
1213                 goto retry_flush_quotas;
1214         }
1215
1216 retry_flush_nodes:
1217         down_write(&sbi->node_write);
1218
1219         if (get_pages(sbi, F2FS_DIRTY_NODES)) {
1220                 up_write(&sbi->node_write);
1221                 atomic_inc(&sbi->wb_sync_req[NODE]);
1222                 err = f2fs_sync_node_pages(sbi, &wbc, false, FS_CP_NODE_IO);
1223                 atomic_dec(&sbi->wb_sync_req[NODE]);
1224                 if (err) {
1225                         up_write(&sbi->node_change);
1226                         f2fs_unlock_all(sbi);
1227                         goto out;
1228                 }
1229                 cond_resched();
1230                 goto retry_flush_nodes;
1231         }
1232
1233         /*
1234          * sbi->node_change is used only for AIO write_begin path which produces
1235          * dirty node blocks and some checkpoint values by block allocation.
1236          */
1237         __prepare_cp_block(sbi);
1238         up_write(&sbi->node_change);
1239 out:
1240         blk_finish_plug(&plug);
1241         return err;
1242 }
1243
1244 static void unblock_operations(struct f2fs_sb_info *sbi)
1245 {
1246         up_write(&sbi->node_write);
1247         f2fs_unlock_all(sbi);
1248 }
1249
1250 void f2fs_wait_on_all_pages(struct f2fs_sb_info *sbi, int type)
1251 {
1252         DEFINE_WAIT(wait);
1253
1254         for (;;) {
1255                 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
1256
1257                 if (!get_pages(sbi, type))
1258                         break;
1259
1260                 if (unlikely(f2fs_cp_error(sbi)))
1261                         break;
1262
1263                 io_schedule_timeout(DEFAULT_IO_TIMEOUT);
1264         }
1265         finish_wait(&sbi->cp_wait, &wait);
1266 }
1267
1268 static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1269 {
1270         unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
1271         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1272         unsigned long flags;
1273
1274         spin_lock_irqsave(&sbi->cp_lock, flags);
1275
1276         if ((cpc->reason & CP_UMOUNT) &&
1277                         le32_to_cpu(ckpt->cp_pack_total_block_count) >
1278                         sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks)
1279                 disable_nat_bits(sbi, false);
1280
1281         if (cpc->reason & CP_TRIMMED)
1282                 __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1283         else
1284                 __clear_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1285
1286         if (cpc->reason & CP_UMOUNT)
1287                 __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1288         else
1289                 __clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1290
1291         if (cpc->reason & CP_FASTBOOT)
1292                 __set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1293         else
1294                 __clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1295
1296         if (orphan_num)
1297                 __set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1298         else
1299                 __clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1300
1301         if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) ||
1302                 is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
1303                 __set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1304
1305         if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
1306                 __set_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1307         else
1308                 __clear_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1309
1310         if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK))
1311                 __set_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1312         else
1313                 __clear_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1314
1315         if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
1316                 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1317         else
1318                 __clear_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1319
1320         if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR))
1321                 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1322
1323         /* set this flag to activate crc|cp_ver for recovery */
1324         __set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
1325         __clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
1326
1327         spin_unlock_irqrestore(&sbi->cp_lock, flags);
1328 }
1329
1330 static void commit_checkpoint(struct f2fs_sb_info *sbi,
1331         void *src, block_t blk_addr)
1332 {
1333         struct writeback_control wbc = {
1334                 .for_reclaim = 0,
1335         };
1336
1337         /*
1338          * pagevec_lookup_tag and lock_page again will take
1339          * some extra time. Therefore, f2fs_update_meta_pages and
1340          * f2fs_sync_meta_pages are combined in this function.
1341          */
1342         struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
1343         int err;
1344
1345         f2fs_wait_on_page_writeback(page, META, true, true);
1346
1347         memcpy(page_address(page), src, PAGE_SIZE);
1348
1349         set_page_dirty(page);
1350         if (unlikely(!clear_page_dirty_for_io(page)))
1351                 f2fs_bug_on(sbi, 1);
1352
1353         /* writeout cp pack 2 page */
1354         err = __f2fs_write_meta_page(page, &wbc, FS_CP_META_IO);
1355         if (unlikely(err && f2fs_cp_error(sbi))) {
1356                 f2fs_put_page(page, 1);
1357                 return;
1358         }
1359
1360         f2fs_bug_on(sbi, err);
1361         f2fs_put_page(page, 0);
1362
1363         /* submit checkpoint (with barrier if NOBARRIER is not set) */
1364         f2fs_submit_merged_write(sbi, META_FLUSH);
1365 }
1366
1367 static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1368 {
1369         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1370         struct f2fs_nm_info *nm_i = NM_I(sbi);
1371         unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num, flags;
1372         block_t start_blk;
1373         unsigned int data_sum_blocks, orphan_blocks;
1374         __u32 crc32 = 0;
1375         int i;
1376         int cp_payload_blks = __cp_payload(sbi);
1377         struct super_block *sb = sbi->sb;
1378         struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1379         u64 kbytes_written;
1380         int err;
1381
1382         /* Flush all the NAT/SIT pages */
1383         f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1384
1385         /* start to update checkpoint, cp ver is already updated previously */
1386         ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi, true));
1387         ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
1388         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
1389                 ckpt->cur_node_segno[i] =
1390                         cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
1391                 ckpt->cur_node_blkoff[i] =
1392                         cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
1393                 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
1394                                 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
1395         }
1396         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
1397                 ckpt->cur_data_segno[i] =
1398                         cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
1399                 ckpt->cur_data_blkoff[i] =
1400                         cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
1401                 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
1402                                 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
1403         }
1404
1405         /* 2 cp  + n data seg summary + orphan inode blocks */
1406         data_sum_blocks = f2fs_npages_for_summary_flush(sbi, false);
1407         spin_lock_irqsave(&sbi->cp_lock, flags);
1408         if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
1409                 __set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1410         else
1411                 __clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1412         spin_unlock_irqrestore(&sbi->cp_lock, flags);
1413
1414         orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
1415         ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
1416                         orphan_blocks);
1417
1418         if (__remain_node_summaries(cpc->reason))
1419                 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
1420                                 cp_payload_blks + data_sum_blocks +
1421                                 orphan_blocks + NR_CURSEG_NODE_TYPE);
1422         else
1423                 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
1424                                 cp_payload_blks + data_sum_blocks +
1425                                 orphan_blocks);
1426
1427         /* update ckpt flag for checkpoint */
1428         update_ckpt_flags(sbi, cpc);
1429
1430         /* update SIT/NAT bitmap */
1431         get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1432         get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1433
1434         crc32 = f2fs_checkpoint_chksum(sbi, ckpt);
1435         *((__le32 *)((unsigned char *)ckpt +
1436                                 le32_to_cpu(ckpt->checksum_offset)))
1437                                 = cpu_to_le32(crc32);
1438
1439         start_blk = __start_cp_next_addr(sbi);
1440
1441         /* write nat bits */
1442         if (enabled_nat_bits(sbi, cpc)) {
1443                 __u64 cp_ver = cur_cp_version(ckpt);
1444                 block_t blk;
1445
1446                 cp_ver |= ((__u64)crc32 << 32);
1447                 *(__le64 *)nm_i->nat_bits = cpu_to_le64(cp_ver);
1448
1449                 blk = start_blk + sbi->blocks_per_seg - nm_i->nat_bits_blocks;
1450                 for (i = 0; i < nm_i->nat_bits_blocks; i++)
1451                         f2fs_update_meta_page(sbi, nm_i->nat_bits +
1452                                         (i << F2FS_BLKSIZE_BITS), blk + i);
1453         }
1454
1455         /* write out checkpoint buffer at block 0 */
1456         f2fs_update_meta_page(sbi, ckpt, start_blk++);
1457
1458         for (i = 1; i < 1 + cp_payload_blks; i++)
1459                 f2fs_update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1460                                                         start_blk++);
1461
1462         if (orphan_num) {
1463                 write_orphan_inodes(sbi, start_blk);
1464                 start_blk += orphan_blocks;
1465         }
1466
1467         f2fs_write_data_summaries(sbi, start_blk);
1468         start_blk += data_sum_blocks;
1469
1470         /* Record write statistics in the hot node summary */
1471         kbytes_written = sbi->kbytes_written;
1472         if (sb->s_bdev->bd_part)
1473                 kbytes_written += BD_PART_WRITTEN(sbi);
1474
1475         seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written);
1476
1477         if (__remain_node_summaries(cpc->reason)) {
1478                 f2fs_write_node_summaries(sbi, start_blk);
1479                 start_blk += NR_CURSEG_NODE_TYPE;
1480         }
1481
1482         /* update user_block_counts */
1483         sbi->last_valid_block_count = sbi->total_valid_block_count;
1484         percpu_counter_set(&sbi->alloc_valid_block_count, 0);
1485
1486         /* Here, we have one bio having CP pack except cp pack 2 page */
1487         f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1488         /* Wait for all dirty meta pages to be submitted for IO */
1489         f2fs_wait_on_all_pages(sbi, F2FS_DIRTY_META);
1490
1491         /* wait for previous submitted meta pages writeback */
1492         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1493
1494         /* flush all device cache */
1495         err = f2fs_flush_device_cache(sbi);
1496         if (err)
1497                 return err;
1498
1499         /* barrier and flush checkpoint cp pack 2 page if it can */
1500         commit_checkpoint(sbi, ckpt, start_blk);
1501         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1502
1503         /*
1504          * invalidate intermediate page cache borrowed from meta inode which are
1505          * used for migration of encrypted or verity inode's blocks.
1506          */
1507         if (f2fs_sb_has_encrypt(sbi) || f2fs_sb_has_verity(sbi))
1508                 invalidate_mapping_pages(META_MAPPING(sbi),
1509                                 MAIN_BLKADDR(sbi), MAX_BLKADDR(sbi) - 1);
1510
1511         f2fs_release_ino_entry(sbi, false);
1512
1513         f2fs_reset_fsync_node_info(sbi);
1514
1515         clear_sbi_flag(sbi, SBI_IS_DIRTY);
1516         clear_sbi_flag(sbi, SBI_NEED_CP);
1517         clear_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1518
1519         spin_lock(&sbi->stat_lock);
1520         sbi->unusable_block_count = 0;
1521         spin_unlock(&sbi->stat_lock);
1522
1523         __set_cp_next_pack(sbi);
1524
1525         /*
1526          * redirty superblock if metadata like node page or inode cache is
1527          * updated during writing checkpoint.
1528          */
1529         if (get_pages(sbi, F2FS_DIRTY_NODES) ||
1530                         get_pages(sbi, F2FS_DIRTY_IMETA))
1531                 set_sbi_flag(sbi, SBI_IS_DIRTY);
1532
1533         f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS));
1534
1535         return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0;
1536 }
1537
1538 int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1539 {
1540         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1541         unsigned long long ckpt_ver;
1542         int err = 0;
1543
1544         if (f2fs_readonly(sbi->sb) || f2fs_hw_is_readonly(sbi))
1545                 return -EROFS;
1546
1547         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1548                 if (cpc->reason != CP_PAUSE)
1549                         return 0;
1550                 f2fs_warn(sbi, "Start checkpoint disabled!");
1551         }
1552         mutex_lock(&sbi->cp_mutex);
1553
1554         if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1555                 ((cpc->reason & CP_FASTBOOT) || (cpc->reason & CP_SYNC) ||
1556                 ((cpc->reason & CP_DISCARD) && !sbi->discard_blks)))
1557                 goto out;
1558         if (unlikely(f2fs_cp_error(sbi))) {
1559                 err = -EIO;
1560                 goto out;
1561         }
1562
1563         trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1564
1565         err = block_operations(sbi);
1566         if (err)
1567                 goto out;
1568
1569         trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1570
1571         f2fs_flush_merged_writes(sbi);
1572
1573         /* this is the case of multiple fstrims without any changes */
1574         if (cpc->reason & CP_DISCARD) {
1575                 if (!f2fs_exist_trim_candidates(sbi, cpc)) {
1576                         unblock_operations(sbi);
1577                         goto out;
1578                 }
1579
1580                 if (NM_I(sbi)->dirty_nat_cnt == 0 &&
1581                                 SIT_I(sbi)->dirty_sentries == 0 &&
1582                                 prefree_segments(sbi) == 0) {
1583                         f2fs_flush_sit_entries(sbi, cpc);
1584                         f2fs_clear_prefree_segments(sbi, cpc);
1585                         unblock_operations(sbi);
1586                         goto out;
1587                 }
1588         }
1589
1590         /*
1591          * update checkpoint pack index
1592          * Increase the version number so that
1593          * SIT entries and seg summaries are written at correct place
1594          */
1595         ckpt_ver = cur_cp_version(ckpt);
1596         ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1597
1598         /* write cached NAT/SIT entries to NAT/SIT area */
1599         err = f2fs_flush_nat_entries(sbi, cpc);
1600         if (err)
1601                 goto stop;
1602
1603         f2fs_flush_sit_entries(sbi, cpc);
1604
1605         err = do_checkpoint(sbi, cpc);
1606         if (err)
1607                 f2fs_release_discard_addrs(sbi);
1608         else
1609                 f2fs_clear_prefree_segments(sbi, cpc);
1610 stop:
1611         unblock_operations(sbi);
1612         stat_inc_cp_count(sbi->stat_info);
1613
1614         if (cpc->reason & CP_RECOVERY)
1615                 f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
1616
1617         /* update CP_TIME to trigger checkpoint periodically */
1618         f2fs_update_time(sbi, CP_TIME);
1619         trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1620 out:
1621         mutex_unlock(&sbi->cp_mutex);
1622         return err;
1623 }
1624
1625 void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi)
1626 {
1627         int i;
1628
1629         for (i = 0; i < MAX_INO_ENTRY; i++) {
1630                 struct inode_management *im = &sbi->im[i];
1631
1632                 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1633                 spin_lock_init(&im->ino_lock);
1634                 INIT_LIST_HEAD(&im->ino_list);
1635                 im->ino_num = 0;
1636         }
1637
1638         sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1639                         NR_CURSEG_TYPE - __cp_payload(sbi)) *
1640                                 F2FS_ORPHANS_PER_BLOCK;
1641 }
1642
1643 int __init f2fs_create_checkpoint_caches(void)
1644 {
1645         ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1646                         sizeof(struct ino_entry));
1647         if (!ino_entry_slab)
1648                 return -ENOMEM;
1649         f2fs_inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1650                         sizeof(struct inode_entry));
1651         if (!f2fs_inode_entry_slab) {
1652                 kmem_cache_destroy(ino_entry_slab);
1653                 return -ENOMEM;
1654         }
1655         return 0;
1656 }
1657
1658 void f2fs_destroy_checkpoint_caches(void)
1659 {
1660         kmem_cache_destroy(ino_entry_slab);
1661         kmem_cache_destroy(f2fs_inode_entry_slab);
1662 }