4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/bio.h>
13 #include <linux/mpage.h>
14 #include <linux/writeback.h>
15 #include <linux/blkdev.h>
16 #include <linux/f2fs_fs.h>
17 #include <linux/pagevec.h>
18 #include <linux/swap.h>
23 #include <trace/events/f2fs.h>
25 static struct kmem_cache *ino_entry_slab;
26 static struct kmem_cache *inode_entry_slab;
29 * We guarantee no failure on the returned page.
31 struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
33 struct address_space *mapping = META_MAPPING(sbi);
34 struct page *page = NULL;
36 page = grab_cache_page(mapping, index);
41 f2fs_wait_on_page_writeback(page, META);
42 SetPageUptodate(page);
47 * We guarantee no failure on the returned page.
49 struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
51 struct address_space *mapping = META_MAPPING(sbi);
54 page = grab_cache_page(mapping, index);
59 if (PageUptodate(page))
62 if (f2fs_submit_page_bio(sbi, page, index,
63 READ_SYNC | REQ_META | REQ_PRIO))
67 if (unlikely(page->mapping != mapping)) {
68 f2fs_put_page(page, 1);
75 static inline bool is_valid_blkaddr(struct f2fs_sb_info *sbi,
76 block_t blkaddr, int type)
82 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
86 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
87 blkaddr < SM_I(sbi)->ssa_blkaddr))
91 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
92 blkaddr < __start_cp_addr(sbi)))
96 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
97 blkaddr < MAIN_BLKADDR(sbi)))
108 * Readahead CP/NAT/SIT/SSA pages
110 int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type)
112 block_t prev_blk_addr = 0;
114 block_t blkno = start;
116 struct f2fs_io_info fio = {
118 .rw = READ_SYNC | REQ_META | REQ_PRIO
121 for (; nrpages-- > 0; blkno++) {
124 if (!is_valid_blkaddr(sbi, blkno, type))
129 if (unlikely(blkno >=
130 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
132 /* get nat block addr */
133 blk_addr = current_nat_addr(sbi,
134 blkno * NAT_ENTRY_PER_BLOCK);
137 /* get sit block addr */
138 blk_addr = current_sit_addr(sbi,
139 blkno * SIT_ENTRY_PER_BLOCK);
140 if (blkno != start && prev_blk_addr + 1 != blk_addr)
142 prev_blk_addr = blk_addr;
153 page = grab_cache_page(META_MAPPING(sbi), blk_addr);
156 if (PageUptodate(page)) {
157 f2fs_put_page(page, 1);
161 f2fs_submit_page_mbio(sbi, page, blk_addr, &fio);
162 f2fs_put_page(page, 0);
165 f2fs_submit_merged_bio(sbi, META, READ);
166 return blkno - start;
169 void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
172 bool readahead = false;
174 page = find_get_page(META_MAPPING(sbi), index);
175 if (!page || (page && !PageUptodate(page)))
177 f2fs_put_page(page, 0);
180 ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR);
183 static int f2fs_write_meta_page(struct page *page,
184 struct writeback_control *wbc)
186 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
188 trace_f2fs_writepage(page, META);
190 if (unlikely(sbi->por_doing))
192 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
194 if (unlikely(f2fs_cp_error(sbi)))
197 f2fs_wait_on_page_writeback(page, META);
198 write_meta_page(sbi, page);
199 dec_page_count(sbi, F2FS_DIRTY_META);
202 if (wbc->for_reclaim)
203 f2fs_submit_merged_bio(sbi, META, WRITE);
207 redirty_page_for_writepage(wbc, page);
208 return AOP_WRITEPAGE_ACTIVATE;
211 static int f2fs_write_meta_pages(struct address_space *mapping,
212 struct writeback_control *wbc)
214 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
217 trace_f2fs_writepages(mapping->host, wbc, META);
219 /* collect a number of dirty meta pages and write together */
220 if (wbc->for_kupdate ||
221 get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
224 /* if mounting is failed, skip writing node pages */
225 mutex_lock(&sbi->cp_mutex);
226 diff = nr_pages_to_write(sbi, META, wbc);
227 written = sync_meta_pages(sbi, META, wbc->nr_to_write);
228 mutex_unlock(&sbi->cp_mutex);
229 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
233 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
237 long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
240 struct address_space *mapping = META_MAPPING(sbi);
241 pgoff_t index = 0, end = LONG_MAX;
244 struct writeback_control wbc = {
248 pagevec_init(&pvec, 0);
250 while (index <= end) {
252 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
254 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
255 if (unlikely(nr_pages == 0))
258 for (i = 0; i < nr_pages; i++) {
259 struct page *page = pvec.pages[i];
263 if (unlikely(page->mapping != mapping)) {
268 if (!PageDirty(page)) {
269 /* someone wrote it for us */
270 goto continue_unlock;
273 if (!clear_page_dirty_for_io(page))
274 goto continue_unlock;
276 if (f2fs_write_meta_page(page, &wbc)) {
281 if (unlikely(nwritten >= nr_to_write))
284 pagevec_release(&pvec);
289 f2fs_submit_merged_bio(sbi, type, WRITE);
294 static int f2fs_set_meta_page_dirty(struct page *page)
296 trace_f2fs_set_page_dirty(page, META);
298 SetPageUptodate(page);
299 if (!PageDirty(page)) {
300 __set_page_dirty_nobuffers(page);
301 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
307 const struct address_space_operations f2fs_meta_aops = {
308 .writepage = f2fs_write_meta_page,
309 .writepages = f2fs_write_meta_pages,
310 .set_page_dirty = f2fs_set_meta_page_dirty,
313 static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
315 struct inode_management *im = &sbi->im[type];
318 if (radix_tree_preload(GFP_NOFS)) {
323 spin_lock(&im->ino_lock);
325 e = radix_tree_lookup(&im->ino_root, ino);
327 e = kmem_cache_alloc(ino_entry_slab, GFP_ATOMIC);
329 spin_unlock(&im->ino_lock);
330 radix_tree_preload_end();
333 if (radix_tree_insert(&im->ino_root, ino, e)) {
334 spin_unlock(&im->ino_lock);
335 kmem_cache_free(ino_entry_slab, e);
336 radix_tree_preload_end();
339 memset(e, 0, sizeof(struct ino_entry));
342 list_add_tail(&e->list, &im->ino_list);
343 if (type != ORPHAN_INO)
346 spin_unlock(&im->ino_lock);
347 radix_tree_preload_end();
350 static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
352 struct inode_management *im = &sbi->im[type];
355 spin_lock(&im->ino_lock);
356 e = radix_tree_lookup(&im->ino_root, ino);
359 radix_tree_delete(&im->ino_root, ino);
361 spin_unlock(&im->ino_lock);
362 kmem_cache_free(ino_entry_slab, e);
365 spin_unlock(&im->ino_lock);
368 void add_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
370 /* add new dirty ino entry into list */
371 __add_ino_entry(sbi, ino, type);
374 void remove_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
376 /* remove dirty ino entry from list */
377 __remove_ino_entry(sbi, ino, type);
380 /* mode should be APPEND_INO or UPDATE_INO */
381 bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
383 struct inode_management *im = &sbi->im[mode];
386 spin_lock(&im->ino_lock);
387 e = radix_tree_lookup(&im->ino_root, ino);
388 spin_unlock(&im->ino_lock);
389 return e ? true : false;
392 void release_dirty_inode(struct f2fs_sb_info *sbi)
394 struct ino_entry *e, *tmp;
397 for (i = APPEND_INO; i <= UPDATE_INO; i++) {
398 struct inode_management *im = &sbi->im[i];
400 spin_lock(&im->ino_lock);
401 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
403 radix_tree_delete(&im->ino_root, e->ino);
404 kmem_cache_free(ino_entry_slab, e);
407 spin_unlock(&im->ino_lock);
411 int acquire_orphan_inode(struct f2fs_sb_info *sbi)
413 struct inode_management *im = &sbi->im[ORPHAN_INO];
416 spin_lock(&im->ino_lock);
417 if (unlikely(im->ino_num >= sbi->max_orphans))
421 spin_unlock(&im->ino_lock);
426 void release_orphan_inode(struct f2fs_sb_info *sbi)
428 struct inode_management *im = &sbi->im[ORPHAN_INO];
430 spin_lock(&im->ino_lock);
431 f2fs_bug_on(sbi, im->ino_num == 0);
433 spin_unlock(&im->ino_lock);
436 void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
438 /* add new orphan ino entry into list */
439 __add_ino_entry(sbi, ino, ORPHAN_INO);
442 void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
444 /* remove orphan entry from orphan list */
445 __remove_ino_entry(sbi, ino, ORPHAN_INO);
448 static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
450 struct inode *inode = f2fs_iget(sbi->sb, ino);
451 f2fs_bug_on(sbi, IS_ERR(inode));
454 /* truncate all the data during iput */
458 void recover_orphan_inodes(struct f2fs_sb_info *sbi)
460 block_t start_blk, orphan_blkaddr, i, j;
462 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
465 sbi->por_doing = true;
467 start_blk = __start_cp_addr(sbi) + 1 +
468 le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
469 orphan_blkaddr = __start_sum_addr(sbi) - 1;
471 ra_meta_pages(sbi, start_blk, orphan_blkaddr, META_CP);
473 for (i = 0; i < orphan_blkaddr; i++) {
474 struct page *page = get_meta_page(sbi, start_blk + i);
475 struct f2fs_orphan_block *orphan_blk;
477 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
478 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
479 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
480 recover_orphan_inode(sbi, ino);
482 f2fs_put_page(page, 1);
484 /* clear Orphan Flag */
485 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
486 sbi->por_doing = false;
490 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
492 struct list_head *head;
493 struct f2fs_orphan_block *orphan_blk = NULL;
494 unsigned int nentries = 0;
495 unsigned short index;
496 unsigned short orphan_blocks;
497 struct page *page = NULL;
498 struct ino_entry *orphan = NULL;
499 struct inode_management *im = &sbi->im[ORPHAN_INO];
501 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
503 for (index = 0; index < orphan_blocks; index++)
504 grab_meta_page(sbi, start_blk + index);
507 spin_lock(&im->ino_lock);
508 head = &im->ino_list;
510 /* loop for each orphan inode entry and write them in Jornal block */
511 list_for_each_entry(orphan, head, list) {
513 page = find_get_page(META_MAPPING(sbi), start_blk++);
514 f2fs_bug_on(sbi, !page);
516 (struct f2fs_orphan_block *)page_address(page);
517 memset(orphan_blk, 0, sizeof(*orphan_blk));
518 f2fs_put_page(page, 0);
521 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
523 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
525 * an orphan block is full of 1020 entries,
526 * then we need to flush current orphan blocks
527 * and bring another one in memory
529 orphan_blk->blk_addr = cpu_to_le16(index);
530 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
531 orphan_blk->entry_count = cpu_to_le32(nentries);
532 set_page_dirty(page);
533 f2fs_put_page(page, 1);
541 orphan_blk->blk_addr = cpu_to_le16(index);
542 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
543 orphan_blk->entry_count = cpu_to_le32(nentries);
544 set_page_dirty(page);
545 f2fs_put_page(page, 1);
548 spin_unlock(&im->ino_lock);
551 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
552 block_t cp_addr, unsigned long long *version)
554 struct page *cp_page_1, *cp_page_2 = NULL;
555 unsigned long blk_size = sbi->blocksize;
556 struct f2fs_checkpoint *cp_block;
557 unsigned long long cur_version = 0, pre_version = 0;
561 /* Read the 1st cp block in this CP pack */
562 cp_page_1 = get_meta_page(sbi, cp_addr);
564 /* get the version number */
565 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
566 crc_offset = le32_to_cpu(cp_block->checksum_offset);
567 if (crc_offset >= blk_size)
570 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
571 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
574 pre_version = cur_cp_version(cp_block);
576 /* Read the 2nd cp block in this CP pack */
577 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
578 cp_page_2 = get_meta_page(sbi, cp_addr);
580 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
581 crc_offset = le32_to_cpu(cp_block->checksum_offset);
582 if (crc_offset >= blk_size)
585 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
586 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
589 cur_version = cur_cp_version(cp_block);
591 if (cur_version == pre_version) {
592 *version = cur_version;
593 f2fs_put_page(cp_page_2, 1);
597 f2fs_put_page(cp_page_2, 1);
599 f2fs_put_page(cp_page_1, 1);
603 int get_valid_checkpoint(struct f2fs_sb_info *sbi)
605 struct f2fs_checkpoint *cp_block;
606 struct f2fs_super_block *fsb = sbi->raw_super;
607 struct page *cp1, *cp2, *cur_page;
608 unsigned long blk_size = sbi->blocksize;
609 unsigned long long cp1_version = 0, cp2_version = 0;
610 unsigned long long cp_start_blk_no;
611 unsigned int cp_blks = 1 + le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
615 sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
619 * Finding out valid cp block involves read both
620 * sets( cp pack1 and cp pack 2)
622 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
623 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
625 /* The second checkpoint pack should start at the next segment */
626 cp_start_blk_no += ((unsigned long long)1) <<
627 le32_to_cpu(fsb->log_blocks_per_seg);
628 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
631 if (ver_after(cp2_version, cp1_version))
643 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
644 memcpy(sbi->ckpt, cp_block, blk_size);
649 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
651 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
653 for (i = 1; i < cp_blks; i++) {
654 void *sit_bitmap_ptr;
655 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
657 cur_page = get_meta_page(sbi, cp_blk_no + i);
658 sit_bitmap_ptr = page_address(cur_page);
659 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
660 f2fs_put_page(cur_page, 1);
663 f2fs_put_page(cp1, 1);
664 f2fs_put_page(cp2, 1);
672 static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new)
674 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
676 if (is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR))
679 set_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
680 F2FS_I(inode)->dirty_dir = new;
681 list_add_tail(&new->list, &sbi->dir_inode_list);
682 stat_inc_dirty_dir(sbi);
686 void update_dirty_page(struct inode *inode, struct page *page)
688 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
689 struct dir_inode_entry *new;
692 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode))
695 if (!S_ISDIR(inode->i_mode)) {
696 inode_inc_dirty_pages(inode);
700 new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
702 INIT_LIST_HEAD(&new->list);
704 spin_lock(&sbi->dir_inode_lock);
705 ret = __add_dirty_inode(inode, new);
706 inode_inc_dirty_pages(inode);
707 spin_unlock(&sbi->dir_inode_lock);
710 kmem_cache_free(inode_entry_slab, new);
712 SetPagePrivate(page);
715 void add_dirty_dir_inode(struct inode *inode)
717 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
718 struct dir_inode_entry *new =
719 f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
723 INIT_LIST_HEAD(&new->list);
725 spin_lock(&sbi->dir_inode_lock);
726 ret = __add_dirty_inode(inode, new);
727 spin_unlock(&sbi->dir_inode_lock);
730 kmem_cache_free(inode_entry_slab, new);
733 void remove_dirty_dir_inode(struct inode *inode)
735 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
736 struct dir_inode_entry *entry;
738 if (!S_ISDIR(inode->i_mode))
741 spin_lock(&sbi->dir_inode_lock);
742 if (get_dirty_pages(inode) ||
743 !is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR)) {
744 spin_unlock(&sbi->dir_inode_lock);
748 entry = F2FS_I(inode)->dirty_dir;
749 list_del(&entry->list);
750 F2FS_I(inode)->dirty_dir = NULL;
751 clear_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
752 stat_dec_dirty_dir(sbi);
753 spin_unlock(&sbi->dir_inode_lock);
754 kmem_cache_free(inode_entry_slab, entry);
756 /* Only from the recovery routine */
757 if (is_inode_flag_set(F2FS_I(inode), FI_DELAY_IPUT)) {
758 clear_inode_flag(F2FS_I(inode), FI_DELAY_IPUT);
763 void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
765 struct list_head *head;
766 struct dir_inode_entry *entry;
769 if (unlikely(f2fs_cp_error(sbi)))
772 spin_lock(&sbi->dir_inode_lock);
774 head = &sbi->dir_inode_list;
775 if (list_empty(head)) {
776 spin_unlock(&sbi->dir_inode_lock);
779 entry = list_entry(head->next, struct dir_inode_entry, list);
780 inode = igrab(entry->inode);
781 spin_unlock(&sbi->dir_inode_lock);
783 filemap_fdatawrite(inode->i_mapping);
787 * We should submit bio, since it exists several
788 * wribacking dentry pages in the freeing inode.
790 f2fs_submit_merged_bio(sbi, DATA, WRITE);
796 * Freeze all the FS-operations for checkpoint.
798 static int block_operations(struct f2fs_sb_info *sbi)
800 struct writeback_control wbc = {
801 .sync_mode = WB_SYNC_ALL,
802 .nr_to_write = LONG_MAX,
805 struct blk_plug plug;
808 blk_start_plug(&plug);
812 /* write all the dirty dentry pages */
813 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
814 f2fs_unlock_all(sbi);
815 sync_dirty_dir_inodes(sbi);
816 if (unlikely(f2fs_cp_error(sbi))) {
820 goto retry_flush_dents;
824 * POR: we should ensure that there are no dirty node pages
825 * until finishing nat/sit flush.
828 down_write(&sbi->node_write);
830 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
831 up_write(&sbi->node_write);
832 sync_node_pages(sbi, 0, &wbc);
833 if (unlikely(f2fs_cp_error(sbi))) {
834 f2fs_unlock_all(sbi);
838 goto retry_flush_nodes;
841 blk_finish_plug(&plug);
845 static void unblock_operations(struct f2fs_sb_info *sbi)
847 up_write(&sbi->node_write);
848 f2fs_unlock_all(sbi);
851 static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
856 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
858 if (!get_pages(sbi, F2FS_WRITEBACK))
863 finish_wait(&sbi->cp_wait, &wait);
866 static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
868 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
869 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
870 struct f2fs_nm_info *nm_i = NM_I(sbi);
871 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
872 nid_t last_nid = nm_i->next_scan_nid;
874 struct page *cp_page;
875 unsigned int data_sum_blocks, orphan_blocks;
879 int cp_payload_blks = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
882 * This avoids to conduct wrong roll-forward operations and uses
883 * metapages, so should be called prior to sync_meta_pages below.
885 discard_next_dnode(sbi, NEXT_FREE_BLKADDR(sbi, curseg));
887 /* Flush all the NAT/SIT pages */
888 while (get_pages(sbi, F2FS_DIRTY_META)) {
889 sync_meta_pages(sbi, META, LONG_MAX);
890 if (unlikely(f2fs_cp_error(sbi)))
894 next_free_nid(sbi, &last_nid);
898 * version number is already updated
900 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
901 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
902 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
903 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
904 ckpt->cur_node_segno[i] =
905 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
906 ckpt->cur_node_blkoff[i] =
907 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
908 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
909 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
911 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
912 ckpt->cur_data_segno[i] =
913 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
914 ckpt->cur_data_blkoff[i] =
915 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
916 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
917 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
920 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
921 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
922 ckpt->next_free_nid = cpu_to_le32(last_nid);
924 /* 2 cp + n data seg summary + orphan inode blocks */
925 data_sum_blocks = npages_for_summary_flush(sbi);
926 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
927 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
929 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
931 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
932 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
935 if (cpc->reason == CP_UMOUNT) {
936 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
937 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
938 cp_payload_blks + data_sum_blocks +
939 orphan_blocks + NR_CURSEG_NODE_TYPE);
941 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
942 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
943 cp_payload_blks + data_sum_blocks +
948 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
950 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
953 set_ckpt_flags(ckpt, CP_FSCK_FLAG);
955 /* update SIT/NAT bitmap */
956 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
957 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
959 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
960 *((__le32 *)((unsigned char *)ckpt +
961 le32_to_cpu(ckpt->checksum_offset)))
962 = cpu_to_le32(crc32);
964 start_blk = __start_cp_addr(sbi);
966 /* write out checkpoint buffer at block 0 */
967 cp_page = grab_meta_page(sbi, start_blk++);
968 kaddr = page_address(cp_page);
969 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
970 set_page_dirty(cp_page);
971 f2fs_put_page(cp_page, 1);
973 for (i = 1; i < 1 + cp_payload_blks; i++) {
974 cp_page = grab_meta_page(sbi, start_blk++);
975 kaddr = page_address(cp_page);
976 memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE,
977 (1 << sbi->log_blocksize));
978 set_page_dirty(cp_page);
979 f2fs_put_page(cp_page, 1);
983 write_orphan_inodes(sbi, start_blk);
984 start_blk += orphan_blocks;
987 write_data_summaries(sbi, start_blk);
988 start_blk += data_sum_blocks;
989 if (cpc->reason == CP_UMOUNT) {
990 write_node_summaries(sbi, start_blk);
991 start_blk += NR_CURSEG_NODE_TYPE;
994 /* writeout checkpoint block */
995 cp_page = grab_meta_page(sbi, start_blk);
996 kaddr = page_address(cp_page);
997 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
998 set_page_dirty(cp_page);
999 f2fs_put_page(cp_page, 1);
1001 /* wait for previous submitted node/meta pages writeback */
1002 wait_on_all_pages_writeback(sbi);
1004 if (unlikely(f2fs_cp_error(sbi)))
1007 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
1008 filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
1010 /* update user_block_counts */
1011 sbi->last_valid_block_count = sbi->total_valid_block_count;
1012 sbi->alloc_valid_block_count = 0;
1014 /* Here, we only have one bio having CP pack */
1015 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
1017 /* wait for previous submitted meta pages writeback */
1018 wait_on_all_pages_writeback(sbi);
1020 release_dirty_inode(sbi);
1022 if (unlikely(f2fs_cp_error(sbi)))
1025 clear_prefree_segments(sbi);
1026 F2FS_RESET_SB_DIRT(sbi);
1030 * We guarantee that this checkpoint procedure will not fail.
1032 void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1034 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1035 unsigned long long ckpt_ver;
1037 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1039 mutex_lock(&sbi->cp_mutex);
1041 if (!sbi->s_dirty && cpc->reason != CP_DISCARD)
1043 if (unlikely(f2fs_cp_error(sbi)))
1045 if (block_operations(sbi))
1048 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1050 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1051 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1052 f2fs_submit_merged_bio(sbi, META, WRITE);
1055 * update checkpoint pack index
1056 * Increase the version number so that
1057 * SIT entries and seg summaries are written at correct place
1059 ckpt_ver = cur_cp_version(ckpt);
1060 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1062 /* write cached NAT/SIT entries to NAT/SIT area */
1063 flush_nat_entries(sbi);
1064 flush_sit_entries(sbi, cpc);
1066 /* unlock all the fs_lock[] in do_checkpoint() */
1067 do_checkpoint(sbi, cpc);
1069 unblock_operations(sbi);
1070 stat_inc_cp_count(sbi->stat_info);
1072 mutex_unlock(&sbi->cp_mutex);
1073 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1076 void init_ino_entry_info(struct f2fs_sb_info *sbi)
1080 for (i = 0; i < MAX_INO_ENTRY; i++) {
1081 struct inode_management *im = &sbi->im[i];
1083 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1084 spin_lock_init(&im->ino_lock);
1085 INIT_LIST_HEAD(&im->ino_list);
1090 * considering 512 blocks in a segment 8 blocks are needed for cp
1091 * and log segment summaries. Remaining blocks are used to keep
1092 * orphan entries with the limitation one reserved segment
1093 * for cp pack we can have max 1020*504 orphan entries
1095 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1096 NR_CURSEG_TYPE) * F2FS_ORPHANS_PER_BLOCK;
1099 int __init create_checkpoint_caches(void)
1101 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1102 sizeof(struct ino_entry));
1103 if (!ino_entry_slab)
1105 inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
1106 sizeof(struct dir_inode_entry));
1107 if (!inode_entry_slab) {
1108 kmem_cache_destroy(ino_entry_slab);
1114 void destroy_checkpoint_caches(void)
1116 kmem_cache_destroy(ino_entry_slab);
1117 kmem_cache_destroy(inode_entry_slab);