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 struct page *get_meta_page_ra(struct f2fs_sb_info *sbi, pgoff_t index)
77 bool readahead = false;
80 page = find_get_page(META_MAPPING(sbi), index);
81 if (!page || (page && !PageUptodate(page)))
83 f2fs_put_page(page, 0);
86 ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR);
87 return get_meta_page(sbi, index);
90 static inline block_t get_max_meta_blks(struct f2fs_sb_info *sbi, int type)
94 return NM_I(sbi)->max_nid / NAT_ENTRY_PER_BLOCK;
96 return SIT_BLK_CNT(sbi);
101 return SM_I(sbi)->seg0_blkaddr + TOTAL_BLKS(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;
115 block_t max_blks = get_max_meta_blks(sbi, type);
116 block_t min_blks = SM_I(sbi)->seg0_blkaddr;
118 struct f2fs_io_info fio = {
120 .rw = READ_SYNC | REQ_META | REQ_PRIO
123 for (; nrpages-- > 0; blkno++) {
128 /* get nat block addr */
129 if (unlikely(blkno >= max_blks))
131 blk_addr = current_nat_addr(sbi,
132 blkno * NAT_ENTRY_PER_BLOCK);
135 /* get sit block addr */
136 if (unlikely(blkno >= max_blks))
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;
147 if (unlikely(blkno >= max_blks))
149 if (unlikely(blkno < min_blks))
157 page = grab_cache_page(META_MAPPING(sbi), blk_addr);
160 if (PageUptodate(page)) {
161 f2fs_put_page(page, 1);
165 f2fs_submit_page_mbio(sbi, page, blk_addr, &fio);
166 f2fs_put_page(page, 0);
169 f2fs_submit_merged_bio(sbi, META, READ);
170 return blkno - start;
173 static int f2fs_write_meta_page(struct page *page,
174 struct writeback_control *wbc)
176 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
178 trace_f2fs_writepage(page, META);
180 if (unlikely(sbi->por_doing))
182 if (wbc->for_reclaim)
184 if (unlikely(f2fs_cp_error(sbi)))
187 f2fs_wait_on_page_writeback(page, META);
188 write_meta_page(sbi, page);
189 dec_page_count(sbi, F2FS_DIRTY_META);
194 redirty_page_for_writepage(wbc, page);
195 return AOP_WRITEPAGE_ACTIVATE;
198 static int f2fs_write_meta_pages(struct address_space *mapping,
199 struct writeback_control *wbc)
201 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
204 trace_f2fs_writepages(mapping->host, wbc, META);
206 /* collect a number of dirty meta pages and write together */
207 if (wbc->for_kupdate ||
208 get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
211 /* if mounting is failed, skip writing node pages */
212 mutex_lock(&sbi->cp_mutex);
213 diff = nr_pages_to_write(sbi, META, wbc);
214 written = sync_meta_pages(sbi, META, wbc->nr_to_write);
215 mutex_unlock(&sbi->cp_mutex);
216 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
220 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
224 long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
227 struct address_space *mapping = META_MAPPING(sbi);
228 pgoff_t index = 0, end = LONG_MAX;
231 struct writeback_control wbc = {
235 pagevec_init(&pvec, 0);
237 while (index <= end) {
239 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
241 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
242 if (unlikely(nr_pages == 0))
245 for (i = 0; i < nr_pages; i++) {
246 struct page *page = pvec.pages[i];
250 if (unlikely(page->mapping != mapping)) {
255 if (!PageDirty(page)) {
256 /* someone wrote it for us */
257 goto continue_unlock;
260 if (!clear_page_dirty_for_io(page))
261 goto continue_unlock;
263 if (f2fs_write_meta_page(page, &wbc)) {
268 if (unlikely(nwritten >= nr_to_write))
271 pagevec_release(&pvec);
276 f2fs_submit_merged_bio(sbi, type, WRITE);
281 static int f2fs_set_meta_page_dirty(struct page *page)
283 trace_f2fs_set_page_dirty(page, META);
285 SetPageUptodate(page);
286 if (!PageDirty(page)) {
287 __set_page_dirty_nobuffers(page);
288 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
294 const struct address_space_operations f2fs_meta_aops = {
295 .writepage = f2fs_write_meta_page,
296 .writepages = f2fs_write_meta_pages,
297 .set_page_dirty = f2fs_set_meta_page_dirty,
300 static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
304 spin_lock(&sbi->ino_lock[type]);
306 e = radix_tree_lookup(&sbi->ino_root[type], ino);
308 e = kmem_cache_alloc(ino_entry_slab, GFP_ATOMIC);
310 spin_unlock(&sbi->ino_lock[type]);
313 if (radix_tree_insert(&sbi->ino_root[type], ino, e)) {
314 spin_unlock(&sbi->ino_lock[type]);
315 kmem_cache_free(ino_entry_slab, e);
318 memset(e, 0, sizeof(struct ino_entry));
321 list_add_tail(&e->list, &sbi->ino_list[type]);
323 spin_unlock(&sbi->ino_lock[type]);
326 static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
330 spin_lock(&sbi->ino_lock[type]);
331 e = radix_tree_lookup(&sbi->ino_root[type], ino);
334 radix_tree_delete(&sbi->ino_root[type], ino);
335 if (type == ORPHAN_INO)
337 spin_unlock(&sbi->ino_lock[type]);
338 kmem_cache_free(ino_entry_slab, e);
341 spin_unlock(&sbi->ino_lock[type]);
344 void add_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
346 /* add new dirty ino entry into list */
347 __add_ino_entry(sbi, ino, type);
350 void remove_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
352 /* remove dirty ino entry from list */
353 __remove_ino_entry(sbi, ino, type);
356 /* mode should be APPEND_INO or UPDATE_INO */
357 bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
360 spin_lock(&sbi->ino_lock[mode]);
361 e = radix_tree_lookup(&sbi->ino_root[mode], ino);
362 spin_unlock(&sbi->ino_lock[mode]);
363 return e ? true : false;
366 void release_dirty_inode(struct f2fs_sb_info *sbi)
368 struct ino_entry *e, *tmp;
371 for (i = APPEND_INO; i <= UPDATE_INO; i++) {
372 spin_lock(&sbi->ino_lock[i]);
373 list_for_each_entry_safe(e, tmp, &sbi->ino_list[i], list) {
375 radix_tree_delete(&sbi->ino_root[i], e->ino);
376 kmem_cache_free(ino_entry_slab, e);
378 spin_unlock(&sbi->ino_lock[i]);
382 int acquire_orphan_inode(struct f2fs_sb_info *sbi)
386 spin_lock(&sbi->ino_lock[ORPHAN_INO]);
387 if (unlikely(sbi->n_orphans >= sbi->max_orphans))
391 spin_unlock(&sbi->ino_lock[ORPHAN_INO]);
396 void release_orphan_inode(struct f2fs_sb_info *sbi)
398 spin_lock(&sbi->ino_lock[ORPHAN_INO]);
399 f2fs_bug_on(sbi, sbi->n_orphans == 0);
401 spin_unlock(&sbi->ino_lock[ORPHAN_INO]);
404 void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
406 /* add new orphan ino entry into list */
407 __add_ino_entry(sbi, ino, ORPHAN_INO);
410 void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
412 /* remove orphan entry from orphan list */
413 __remove_ino_entry(sbi, ino, ORPHAN_INO);
416 static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
418 struct inode *inode = f2fs_iget(sbi->sb, ino);
419 f2fs_bug_on(sbi, IS_ERR(inode));
422 /* truncate all the data during iput */
426 void recover_orphan_inodes(struct f2fs_sb_info *sbi)
428 block_t start_blk, orphan_blkaddr, i, j;
430 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
433 sbi->por_doing = true;
435 start_blk = __start_cp_addr(sbi) + 1 +
436 le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
437 orphan_blkaddr = __start_sum_addr(sbi) - 1;
439 ra_meta_pages(sbi, start_blk, orphan_blkaddr, META_CP);
441 for (i = 0; i < orphan_blkaddr; i++) {
442 struct page *page = get_meta_page(sbi, start_blk + i);
443 struct f2fs_orphan_block *orphan_blk;
445 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
446 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
447 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
448 recover_orphan_inode(sbi, ino);
450 f2fs_put_page(page, 1);
452 /* clear Orphan Flag */
453 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
454 sbi->por_doing = false;
458 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
460 struct list_head *head;
461 struct f2fs_orphan_block *orphan_blk = NULL;
462 unsigned int nentries = 0;
463 unsigned short index;
464 unsigned short orphan_blocks =
465 (unsigned short)GET_ORPHAN_BLOCKS(sbi->n_orphans);
466 struct page *page = NULL;
467 struct ino_entry *orphan = NULL;
469 for (index = 0; index < orphan_blocks; index++)
470 grab_meta_page(sbi, start_blk + index);
473 spin_lock(&sbi->ino_lock[ORPHAN_INO]);
474 head = &sbi->ino_list[ORPHAN_INO];
476 /* loop for each orphan inode entry and write them in Jornal block */
477 list_for_each_entry(orphan, head, list) {
479 page = find_get_page(META_MAPPING(sbi), start_blk++);
480 f2fs_bug_on(sbi, !page);
482 (struct f2fs_orphan_block *)page_address(page);
483 memset(orphan_blk, 0, sizeof(*orphan_blk));
484 f2fs_put_page(page, 0);
487 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
489 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
491 * an orphan block is full of 1020 entries,
492 * then we need to flush current orphan blocks
493 * and bring another one in memory
495 orphan_blk->blk_addr = cpu_to_le16(index);
496 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
497 orphan_blk->entry_count = cpu_to_le32(nentries);
498 set_page_dirty(page);
499 f2fs_put_page(page, 1);
507 orphan_blk->blk_addr = cpu_to_le16(index);
508 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
509 orphan_blk->entry_count = cpu_to_le32(nentries);
510 set_page_dirty(page);
511 f2fs_put_page(page, 1);
514 spin_unlock(&sbi->ino_lock[ORPHAN_INO]);
517 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
518 block_t cp_addr, unsigned long long *version)
520 struct page *cp_page_1, *cp_page_2 = NULL;
521 unsigned long blk_size = sbi->blocksize;
522 struct f2fs_checkpoint *cp_block;
523 unsigned long long cur_version = 0, pre_version = 0;
527 /* Read the 1st cp block in this CP pack */
528 cp_page_1 = get_meta_page(sbi, cp_addr);
530 /* get the version number */
531 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
532 crc_offset = le32_to_cpu(cp_block->checksum_offset);
533 if (crc_offset >= blk_size)
536 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
537 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
540 pre_version = cur_cp_version(cp_block);
542 /* Read the 2nd cp block in this CP pack */
543 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
544 cp_page_2 = get_meta_page(sbi, cp_addr);
546 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
547 crc_offset = le32_to_cpu(cp_block->checksum_offset);
548 if (crc_offset >= blk_size)
551 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
552 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
555 cur_version = cur_cp_version(cp_block);
557 if (cur_version == pre_version) {
558 *version = cur_version;
559 f2fs_put_page(cp_page_2, 1);
563 f2fs_put_page(cp_page_2, 1);
565 f2fs_put_page(cp_page_1, 1);
569 int get_valid_checkpoint(struct f2fs_sb_info *sbi)
571 struct f2fs_checkpoint *cp_block;
572 struct f2fs_super_block *fsb = sbi->raw_super;
573 struct page *cp1, *cp2, *cur_page;
574 unsigned long blk_size = sbi->blocksize;
575 unsigned long long cp1_version = 0, cp2_version = 0;
576 unsigned long long cp_start_blk_no;
577 unsigned int cp_blks = 1 + le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
581 sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
585 * Finding out valid cp block involves read both
586 * sets( cp pack1 and cp pack 2)
588 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
589 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
591 /* The second checkpoint pack should start at the next segment */
592 cp_start_blk_no += ((unsigned long long)1) <<
593 le32_to_cpu(fsb->log_blocks_per_seg);
594 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
597 if (ver_after(cp2_version, cp1_version))
609 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
610 memcpy(sbi->ckpt, cp_block, blk_size);
615 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
617 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
619 for (i = 1; i < cp_blks; i++) {
620 void *sit_bitmap_ptr;
621 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
623 cur_page = get_meta_page(sbi, cp_blk_no + i);
624 sit_bitmap_ptr = page_address(cur_page);
625 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
626 f2fs_put_page(cur_page, 1);
629 f2fs_put_page(cp1, 1);
630 f2fs_put_page(cp2, 1);
638 static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new)
640 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
642 if (is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR))
645 set_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
646 F2FS_I(inode)->dirty_dir = new;
647 list_add_tail(&new->list, &sbi->dir_inode_list);
648 stat_inc_dirty_dir(sbi);
652 void update_dirty_page(struct inode *inode, struct page *page)
654 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
655 struct dir_inode_entry *new;
658 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode))
661 if (!S_ISDIR(inode->i_mode)) {
662 inode_inc_dirty_pages(inode);
666 new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
668 INIT_LIST_HEAD(&new->list);
670 spin_lock(&sbi->dir_inode_lock);
671 ret = __add_dirty_inode(inode, new);
672 inode_inc_dirty_pages(inode);
673 spin_unlock(&sbi->dir_inode_lock);
676 kmem_cache_free(inode_entry_slab, new);
678 SetPagePrivate(page);
681 void add_dirty_dir_inode(struct inode *inode)
683 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
684 struct dir_inode_entry *new =
685 f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
689 INIT_LIST_HEAD(&new->list);
691 spin_lock(&sbi->dir_inode_lock);
692 ret = __add_dirty_inode(inode, new);
693 spin_unlock(&sbi->dir_inode_lock);
696 kmem_cache_free(inode_entry_slab, new);
699 void remove_dirty_dir_inode(struct inode *inode)
701 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
702 struct dir_inode_entry *entry;
704 if (!S_ISDIR(inode->i_mode))
707 spin_lock(&sbi->dir_inode_lock);
708 if (get_dirty_pages(inode) ||
709 !is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR)) {
710 spin_unlock(&sbi->dir_inode_lock);
714 entry = F2FS_I(inode)->dirty_dir;
715 list_del(&entry->list);
716 F2FS_I(inode)->dirty_dir = NULL;
717 clear_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
718 stat_dec_dirty_dir(sbi);
719 spin_unlock(&sbi->dir_inode_lock);
720 kmem_cache_free(inode_entry_slab, entry);
722 /* Only from the recovery routine */
723 if (is_inode_flag_set(F2FS_I(inode), FI_DELAY_IPUT)) {
724 clear_inode_flag(F2FS_I(inode), FI_DELAY_IPUT);
729 void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
731 struct list_head *head;
732 struct dir_inode_entry *entry;
735 spin_lock(&sbi->dir_inode_lock);
737 head = &sbi->dir_inode_list;
738 if (list_empty(head)) {
739 spin_unlock(&sbi->dir_inode_lock);
742 entry = list_entry(head->next, struct dir_inode_entry, list);
743 inode = igrab(entry->inode);
744 spin_unlock(&sbi->dir_inode_lock);
746 filemap_fdatawrite(inode->i_mapping);
750 * We should submit bio, since it exists several
751 * wribacking dentry pages in the freeing inode.
753 f2fs_submit_merged_bio(sbi, DATA, WRITE);
759 * Freeze all the FS-operations for checkpoint.
761 static int block_operations(struct f2fs_sb_info *sbi)
763 struct writeback_control wbc = {
764 .sync_mode = WB_SYNC_ALL,
765 .nr_to_write = LONG_MAX,
768 struct blk_plug plug;
771 blk_start_plug(&plug);
775 /* write all the dirty dentry pages */
776 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
777 f2fs_unlock_all(sbi);
778 sync_dirty_dir_inodes(sbi);
779 if (unlikely(f2fs_cp_error(sbi))) {
783 goto retry_flush_dents;
787 * POR: we should ensure that there are no dirty node pages
788 * until finishing nat/sit flush.
791 down_write(&sbi->node_write);
793 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
794 up_write(&sbi->node_write);
795 sync_node_pages(sbi, 0, &wbc);
796 if (unlikely(f2fs_cp_error(sbi))) {
797 f2fs_unlock_all(sbi);
801 goto retry_flush_nodes;
804 blk_finish_plug(&plug);
808 static void unblock_operations(struct f2fs_sb_info *sbi)
810 up_write(&sbi->node_write);
811 f2fs_unlock_all(sbi);
814 static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
819 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
821 if (!get_pages(sbi, F2FS_WRITEBACK))
826 finish_wait(&sbi->cp_wait, &wait);
829 static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
831 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
832 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
833 struct f2fs_nm_info *nm_i = NM_I(sbi);
834 nid_t last_nid = nm_i->next_scan_nid;
836 struct page *cp_page;
837 unsigned int data_sum_blocks, orphan_blocks;
841 int cp_payload_blks = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
844 * This avoids to conduct wrong roll-forward operations and uses
845 * metapages, so should be called prior to sync_meta_pages below.
847 discard_next_dnode(sbi, NEXT_FREE_BLKADDR(sbi, curseg));
849 /* Flush all the NAT/SIT pages */
850 while (get_pages(sbi, F2FS_DIRTY_META)) {
851 sync_meta_pages(sbi, META, LONG_MAX);
852 if (unlikely(f2fs_cp_error(sbi)))
856 next_free_nid(sbi, &last_nid);
860 * version number is already updated
862 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
863 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
864 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
865 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
866 ckpt->cur_node_segno[i] =
867 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
868 ckpt->cur_node_blkoff[i] =
869 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
870 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
871 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
873 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
874 ckpt->cur_data_segno[i] =
875 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
876 ckpt->cur_data_blkoff[i] =
877 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
878 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
879 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
882 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
883 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
884 ckpt->next_free_nid = cpu_to_le32(last_nid);
886 /* 2 cp + n data seg summary + orphan inode blocks */
887 data_sum_blocks = npages_for_summary_flush(sbi);
888 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
889 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
891 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
893 orphan_blocks = GET_ORPHAN_BLOCKS(sbi->n_orphans);
894 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
897 if (cpc->reason == CP_UMOUNT) {
898 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
899 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
900 cp_payload_blks + data_sum_blocks +
901 orphan_blocks + NR_CURSEG_NODE_TYPE);
903 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
904 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
905 cp_payload_blks + data_sum_blocks +
910 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
912 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
915 set_ckpt_flags(ckpt, CP_FSCK_FLAG);
917 /* update SIT/NAT bitmap */
918 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
919 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
921 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
922 *((__le32 *)((unsigned char *)ckpt +
923 le32_to_cpu(ckpt->checksum_offset)))
924 = cpu_to_le32(crc32);
926 start_blk = __start_cp_addr(sbi);
928 /* write out checkpoint buffer at block 0 */
929 cp_page = grab_meta_page(sbi, start_blk++);
930 kaddr = page_address(cp_page);
931 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
932 set_page_dirty(cp_page);
933 f2fs_put_page(cp_page, 1);
935 for (i = 1; i < 1 + cp_payload_blks; i++) {
936 cp_page = grab_meta_page(sbi, start_blk++);
937 kaddr = page_address(cp_page);
938 memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE,
939 (1 << sbi->log_blocksize));
940 set_page_dirty(cp_page);
941 f2fs_put_page(cp_page, 1);
944 if (sbi->n_orphans) {
945 write_orphan_inodes(sbi, start_blk);
946 start_blk += orphan_blocks;
949 write_data_summaries(sbi, start_blk);
950 start_blk += data_sum_blocks;
951 if (cpc->reason == CP_UMOUNT) {
952 write_node_summaries(sbi, start_blk);
953 start_blk += NR_CURSEG_NODE_TYPE;
956 /* writeout checkpoint block */
957 cp_page = grab_meta_page(sbi, start_blk);
958 kaddr = page_address(cp_page);
959 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
960 set_page_dirty(cp_page);
961 f2fs_put_page(cp_page, 1);
963 /* wait for previous submitted node/meta pages writeback */
964 wait_on_all_pages_writeback(sbi);
966 if (unlikely(f2fs_cp_error(sbi)))
969 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
970 filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
972 /* update user_block_counts */
973 sbi->last_valid_block_count = sbi->total_valid_block_count;
974 sbi->alloc_valid_block_count = 0;
976 /* Here, we only have one bio having CP pack */
977 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
979 release_dirty_inode(sbi);
981 if (unlikely(f2fs_cp_error(sbi)))
984 clear_prefree_segments(sbi);
985 F2FS_RESET_SB_DIRT(sbi);
989 * We guarantee that this checkpoint procedure will not fail.
991 void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
993 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
994 unsigned long long ckpt_ver;
996 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
998 mutex_lock(&sbi->cp_mutex);
1000 if (!sbi->s_dirty && cpc->reason != CP_DISCARD)
1002 if (unlikely(f2fs_cp_error(sbi)))
1004 if (block_operations(sbi))
1007 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1009 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1010 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1011 f2fs_submit_merged_bio(sbi, META, WRITE);
1014 * update checkpoint pack index
1015 * Increase the version number so that
1016 * SIT entries and seg summaries are written at correct place
1018 ckpt_ver = cur_cp_version(ckpt);
1019 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1021 /* write cached NAT/SIT entries to NAT/SIT area */
1022 flush_nat_entries(sbi);
1023 flush_sit_entries(sbi, cpc);
1025 /* unlock all the fs_lock[] in do_checkpoint() */
1026 do_checkpoint(sbi, cpc);
1028 unblock_operations(sbi);
1029 stat_inc_cp_count(sbi->stat_info);
1031 mutex_unlock(&sbi->cp_mutex);
1032 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1035 void init_ino_entry_info(struct f2fs_sb_info *sbi)
1039 for (i = 0; i < MAX_INO_ENTRY; i++) {
1040 INIT_RADIX_TREE(&sbi->ino_root[i], GFP_ATOMIC);
1041 spin_lock_init(&sbi->ino_lock[i]);
1042 INIT_LIST_HEAD(&sbi->ino_list[i]);
1046 * considering 512 blocks in a segment 8 blocks are needed for cp
1047 * and log segment summaries. Remaining blocks are used to keep
1048 * orphan entries with the limitation one reserved segment
1049 * for cp pack we can have max 1020*504 orphan entries
1052 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1053 NR_CURSEG_TYPE) * F2FS_ORPHANS_PER_BLOCK;
1056 int __init create_checkpoint_caches(void)
1058 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1059 sizeof(struct ino_entry));
1060 if (!ino_entry_slab)
1062 inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
1063 sizeof(struct dir_inode_entry));
1064 if (!inode_entry_slab) {
1065 kmem_cache_destroy(ino_entry_slab);
1071 void destroy_checkpoint_caches(void)
1073 kmem_cache_destroy(ino_entry_slab);
1074 kmem_cache_destroy(inode_entry_slab);