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 *orphan_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);
42 /* We wait writeback only inside grab_meta_page() */
43 wait_on_page_writeback(page);
44 SetPageUptodate(page);
49 * We guarantee no failure on the returned page.
51 struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
53 struct address_space *mapping = META_MAPPING(sbi);
56 page = grab_cache_page(mapping, index);
61 if (PageUptodate(page))
64 if (f2fs_submit_page_bio(sbi, page, index,
65 READ_SYNC | REQ_META | REQ_PRIO))
69 if (unlikely(page->mapping != mapping)) {
70 f2fs_put_page(page, 1);
74 mark_page_accessed(page);
78 static int f2fs_write_meta_page(struct page *page,
79 struct writeback_control *wbc)
81 struct inode *inode = page->mapping->host;
82 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
84 /* Should not write any meta pages, if any IO error was occurred */
85 if (unlikely(sbi->por_doing ||
86 is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ERROR_FLAG)))
92 wait_on_page_writeback(page);
94 write_meta_page(sbi, page);
95 dec_page_count(sbi, F2FS_DIRTY_META);
100 dec_page_count(sbi, F2FS_DIRTY_META);
101 wbc->pages_skipped++;
102 set_page_dirty(page);
103 return AOP_WRITEPAGE_ACTIVATE;
106 static int f2fs_write_meta_pages(struct address_space *mapping,
107 struct writeback_control *wbc)
109 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
110 int nrpages = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
113 if (wbc->for_kupdate)
116 /* collect a number of dirty meta pages and write together */
117 if (get_pages(sbi, F2FS_DIRTY_META) < nrpages)
120 /* if mounting is failed, skip writing node pages */
121 mutex_lock(&sbi->cp_mutex);
122 written = sync_meta_pages(sbi, META, nrpages);
123 mutex_unlock(&sbi->cp_mutex);
124 wbc->nr_to_write -= written;
128 long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
131 struct address_space *mapping = META_MAPPING(sbi);
132 pgoff_t index = 0, end = LONG_MAX;
135 struct writeback_control wbc = {
139 pagevec_init(&pvec, 0);
141 while (index <= end) {
143 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
145 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
146 if (unlikely(nr_pages == 0))
149 for (i = 0; i < nr_pages; i++) {
150 struct page *page = pvec.pages[i];
152 f2fs_bug_on(page->mapping != mapping);
153 f2fs_bug_on(!PageDirty(page));
154 clear_page_dirty_for_io(page);
155 if (f2fs_write_meta_page(page, &wbc)) {
160 if (unlikely(nwritten >= nr_to_write))
163 pagevec_release(&pvec);
168 f2fs_submit_merged_bio(sbi, type, WRITE);
173 static int f2fs_set_meta_page_dirty(struct page *page)
175 struct address_space *mapping = page->mapping;
176 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
178 trace_f2fs_set_page_dirty(page, META);
180 SetPageUptodate(page);
181 if (!PageDirty(page)) {
182 __set_page_dirty_nobuffers(page);
183 inc_page_count(sbi, F2FS_DIRTY_META);
189 const struct address_space_operations f2fs_meta_aops = {
190 .writepage = f2fs_write_meta_page,
191 .writepages = f2fs_write_meta_pages,
192 .set_page_dirty = f2fs_set_meta_page_dirty,
195 int acquire_orphan_inode(struct f2fs_sb_info *sbi)
199 spin_lock(&sbi->orphan_inode_lock);
200 if (unlikely(sbi->n_orphans >= sbi->max_orphans))
204 spin_unlock(&sbi->orphan_inode_lock);
209 void release_orphan_inode(struct f2fs_sb_info *sbi)
211 spin_lock(&sbi->orphan_inode_lock);
212 f2fs_bug_on(sbi->n_orphans == 0);
214 spin_unlock(&sbi->orphan_inode_lock);
217 void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
219 struct list_head *head, *this;
220 struct orphan_inode_entry *new = NULL, *orphan = NULL;
222 new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
225 spin_lock(&sbi->orphan_inode_lock);
226 head = &sbi->orphan_inode_list;
227 list_for_each(this, head) {
228 orphan = list_entry(this, struct orphan_inode_entry, list);
229 if (orphan->ino == ino) {
230 spin_unlock(&sbi->orphan_inode_lock);
231 kmem_cache_free(orphan_entry_slab, new);
235 if (orphan->ino > ino)
240 /* add new_oentry into list which is sorted by inode number */
242 list_add(&new->list, this->prev);
244 list_add_tail(&new->list, head);
245 spin_unlock(&sbi->orphan_inode_lock);
248 void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
250 struct list_head *head;
251 struct orphan_inode_entry *orphan;
253 spin_lock(&sbi->orphan_inode_lock);
254 head = &sbi->orphan_inode_list;
255 list_for_each_entry(orphan, head, list) {
256 if (orphan->ino == ino) {
257 list_del(&orphan->list);
258 kmem_cache_free(orphan_entry_slab, orphan);
259 f2fs_bug_on(sbi->n_orphans == 0);
264 spin_unlock(&sbi->orphan_inode_lock);
267 static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
269 struct inode *inode = f2fs_iget(sbi->sb, ino);
270 f2fs_bug_on(IS_ERR(inode));
273 /* truncate all the data during iput */
277 void recover_orphan_inodes(struct f2fs_sb_info *sbi)
279 block_t start_blk, orphan_blkaddr, i, j;
281 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
284 sbi->por_doing = true;
285 start_blk = __start_cp_addr(sbi) + 1;
286 orphan_blkaddr = __start_sum_addr(sbi) - 1;
288 for (i = 0; i < orphan_blkaddr; i++) {
289 struct page *page = get_meta_page(sbi, start_blk + i);
290 struct f2fs_orphan_block *orphan_blk;
292 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
293 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
294 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
295 recover_orphan_inode(sbi, ino);
297 f2fs_put_page(page, 1);
299 /* clear Orphan Flag */
300 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
301 sbi->por_doing = false;
305 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
307 struct list_head *head;
308 struct f2fs_orphan_block *orphan_blk = NULL;
309 unsigned int nentries = 0;
310 unsigned short index;
311 unsigned short orphan_blocks = (unsigned short)((sbi->n_orphans +
312 (F2FS_ORPHANS_PER_BLOCK - 1)) / F2FS_ORPHANS_PER_BLOCK);
313 struct page *page = NULL;
314 struct page *pages[orphan_blocks];
315 struct orphan_inode_entry *orphan = NULL;
317 for (index = 0; index < orphan_blocks; index++)
318 pages[index] = grab_meta_page(sbi, start_blk + index);
321 spin_lock(&sbi->orphan_inode_lock);
322 head = &sbi->orphan_inode_list;
324 /* loop for each orphan inode entry and write them in Jornal block */
325 list_for_each_entry(orphan, head, list) {
327 page = pages[index - 1];
329 (struct f2fs_orphan_block *)page_address(page);
330 memset(orphan_blk, 0, sizeof(*orphan_blk));
333 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
335 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
337 * an orphan block is full of 1020 entries,
338 * then we need to flush current orphan blocks
339 * and bring another one in memory
341 orphan_blk->blk_addr = cpu_to_le16(index);
342 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
343 orphan_blk->entry_count = cpu_to_le32(nentries);
344 set_page_dirty(page);
345 f2fs_put_page(page, 1);
353 orphan_blk->blk_addr = cpu_to_le16(index);
354 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
355 orphan_blk->entry_count = cpu_to_le32(nentries);
356 set_page_dirty(page);
357 f2fs_put_page(page, 1);
360 spin_unlock(&sbi->orphan_inode_lock);
363 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
364 block_t cp_addr, unsigned long long *version)
366 struct page *cp_page_1, *cp_page_2 = NULL;
367 unsigned long blk_size = sbi->blocksize;
368 struct f2fs_checkpoint *cp_block;
369 unsigned long long cur_version = 0, pre_version = 0;
373 /* Read the 1st cp block in this CP pack */
374 cp_page_1 = get_meta_page(sbi, cp_addr);
376 /* get the version number */
377 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
378 crc_offset = le32_to_cpu(cp_block->checksum_offset);
379 if (crc_offset >= blk_size)
382 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
383 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
386 pre_version = cur_cp_version(cp_block);
388 /* Read the 2nd cp block in this CP pack */
389 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
390 cp_page_2 = get_meta_page(sbi, cp_addr);
392 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
393 crc_offset = le32_to_cpu(cp_block->checksum_offset);
394 if (crc_offset >= blk_size)
397 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
398 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
401 cur_version = cur_cp_version(cp_block);
403 if (cur_version == pre_version) {
404 *version = cur_version;
405 f2fs_put_page(cp_page_2, 1);
409 f2fs_put_page(cp_page_2, 1);
411 f2fs_put_page(cp_page_1, 1);
415 int get_valid_checkpoint(struct f2fs_sb_info *sbi)
417 struct f2fs_checkpoint *cp_block;
418 struct f2fs_super_block *fsb = sbi->raw_super;
419 struct page *cp1, *cp2, *cur_page;
420 unsigned long blk_size = sbi->blocksize;
421 unsigned long long cp1_version = 0, cp2_version = 0;
422 unsigned long long cp_start_blk_no;
424 sbi->ckpt = kzalloc(blk_size, GFP_KERNEL);
428 * Finding out valid cp block involves read both
429 * sets( cp pack1 and cp pack 2)
431 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
432 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
434 /* The second checkpoint pack should start at the next segment */
435 cp_start_blk_no += ((unsigned long long)1) <<
436 le32_to_cpu(fsb->log_blocks_per_seg);
437 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
440 if (ver_after(cp2_version, cp1_version))
452 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
453 memcpy(sbi->ckpt, cp_block, blk_size);
455 f2fs_put_page(cp1, 1);
456 f2fs_put_page(cp2, 1);
464 static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new)
466 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
467 struct list_head *head = &sbi->dir_inode_list;
468 struct list_head *this;
470 list_for_each(this, head) {
471 struct dir_inode_entry *entry;
472 entry = list_entry(this, struct dir_inode_entry, list);
473 if (unlikely(entry->inode == inode))
476 list_add_tail(&new->list, head);
477 stat_inc_dirty_dir(sbi);
481 void set_dirty_dir_page(struct inode *inode, struct page *page)
483 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
484 struct dir_inode_entry *new;
486 if (!S_ISDIR(inode->i_mode))
489 new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
491 INIT_LIST_HEAD(&new->list);
493 spin_lock(&sbi->dir_inode_lock);
494 if (__add_dirty_inode(inode, new))
495 kmem_cache_free(inode_entry_slab, new);
497 inc_page_count(sbi, F2FS_DIRTY_DENTS);
498 inode_inc_dirty_dents(inode);
499 SetPagePrivate(page);
500 spin_unlock(&sbi->dir_inode_lock);
503 void add_dirty_dir_inode(struct inode *inode)
505 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
506 struct dir_inode_entry *new =
507 f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
510 INIT_LIST_HEAD(&new->list);
512 spin_lock(&sbi->dir_inode_lock);
513 if (__add_dirty_inode(inode, new))
514 kmem_cache_free(inode_entry_slab, new);
515 spin_unlock(&sbi->dir_inode_lock);
518 void remove_dirty_dir_inode(struct inode *inode)
520 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
522 struct list_head *this, *head;
524 if (!S_ISDIR(inode->i_mode))
527 spin_lock(&sbi->dir_inode_lock);
528 if (atomic_read(&F2FS_I(inode)->dirty_dents)) {
529 spin_unlock(&sbi->dir_inode_lock);
533 head = &sbi->dir_inode_list;
534 list_for_each(this, head) {
535 struct dir_inode_entry *entry;
536 entry = list_entry(this, struct dir_inode_entry, list);
537 if (entry->inode == inode) {
538 list_del(&entry->list);
539 kmem_cache_free(inode_entry_slab, entry);
540 stat_dec_dirty_dir(sbi);
544 spin_unlock(&sbi->dir_inode_lock);
546 /* Only from the recovery routine */
547 if (is_inode_flag_set(F2FS_I(inode), FI_DELAY_IPUT)) {
548 clear_inode_flag(F2FS_I(inode), FI_DELAY_IPUT);
553 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *sbi, nid_t ino)
556 struct list_head *this, *head;
557 struct inode *inode = NULL;
559 spin_lock(&sbi->dir_inode_lock);
561 head = &sbi->dir_inode_list;
562 list_for_each(this, head) {
563 struct dir_inode_entry *entry;
564 entry = list_entry(this, struct dir_inode_entry, list);
565 if (entry->inode->i_ino == ino) {
566 inode = entry->inode;
570 spin_unlock(&sbi->dir_inode_lock);
574 void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
576 struct list_head *head;
577 struct dir_inode_entry *entry;
580 spin_lock(&sbi->dir_inode_lock);
582 head = &sbi->dir_inode_list;
583 if (list_empty(head)) {
584 spin_unlock(&sbi->dir_inode_lock);
587 entry = list_entry(head->next, struct dir_inode_entry, list);
588 inode = igrab(entry->inode);
589 spin_unlock(&sbi->dir_inode_lock);
591 filemap_flush(inode->i_mapping);
595 * We should submit bio, since it exists several
596 * wribacking dentry pages in the freeing inode.
598 f2fs_submit_merged_bio(sbi, DATA, WRITE);
604 * Freeze all the FS-operations for checkpoint.
606 static void block_operations(struct f2fs_sb_info *sbi)
608 struct writeback_control wbc = {
609 .sync_mode = WB_SYNC_ALL,
610 .nr_to_write = LONG_MAX,
613 struct blk_plug plug;
615 blk_start_plug(&plug);
619 /* write all the dirty dentry pages */
620 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
621 f2fs_unlock_all(sbi);
622 sync_dirty_dir_inodes(sbi);
623 goto retry_flush_dents;
627 * POR: we should ensure that there is no dirty node pages
628 * until finishing nat/sit flush.
631 mutex_lock(&sbi->node_write);
633 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
634 mutex_unlock(&sbi->node_write);
635 sync_node_pages(sbi, 0, &wbc);
636 goto retry_flush_nodes;
638 blk_finish_plug(&plug);
641 static void unblock_operations(struct f2fs_sb_info *sbi)
643 mutex_unlock(&sbi->node_write);
644 f2fs_unlock_all(sbi);
647 static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
652 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
654 if (!get_pages(sbi, F2FS_WRITEBACK))
659 finish_wait(&sbi->cp_wait, &wait);
662 static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
664 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
667 struct page *cp_page;
668 unsigned int data_sum_blocks, orphan_blocks;
673 /* Flush all the NAT/SIT pages */
674 while (get_pages(sbi, F2FS_DIRTY_META))
675 sync_meta_pages(sbi, META, LONG_MAX);
677 next_free_nid(sbi, &last_nid);
681 * version number is already updated
683 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
684 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
685 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
686 for (i = 0; i < 3; i++) {
687 ckpt->cur_node_segno[i] =
688 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
689 ckpt->cur_node_blkoff[i] =
690 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
691 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
692 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
694 for (i = 0; i < 3; i++) {
695 ckpt->cur_data_segno[i] =
696 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
697 ckpt->cur_data_blkoff[i] =
698 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
699 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
700 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
703 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
704 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
705 ckpt->next_free_nid = cpu_to_le32(last_nid);
707 /* 2 cp + n data seg summary + orphan inode blocks */
708 data_sum_blocks = npages_for_summary_flush(sbi);
709 if (data_sum_blocks < 3)
710 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
712 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
714 orphan_blocks = (sbi->n_orphans + F2FS_ORPHANS_PER_BLOCK - 1)
715 / F2FS_ORPHANS_PER_BLOCK;
716 ckpt->cp_pack_start_sum = cpu_to_le32(1 + orphan_blocks);
719 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
720 ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
721 data_sum_blocks + orphan_blocks + NR_CURSEG_NODE_TYPE);
723 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
724 ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
725 data_sum_blocks + orphan_blocks);
729 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
731 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
733 /* update SIT/NAT bitmap */
734 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
735 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
737 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
738 *((__le32 *)((unsigned char *)ckpt +
739 le32_to_cpu(ckpt->checksum_offset)))
740 = cpu_to_le32(crc32);
742 start_blk = __start_cp_addr(sbi);
744 /* write out checkpoint buffer at block 0 */
745 cp_page = grab_meta_page(sbi, start_blk++);
746 kaddr = page_address(cp_page);
747 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
748 set_page_dirty(cp_page);
749 f2fs_put_page(cp_page, 1);
751 if (sbi->n_orphans) {
752 write_orphan_inodes(sbi, start_blk);
753 start_blk += orphan_blocks;
756 write_data_summaries(sbi, start_blk);
757 start_blk += data_sum_blocks;
759 write_node_summaries(sbi, start_blk);
760 start_blk += NR_CURSEG_NODE_TYPE;
763 /* writeout checkpoint block */
764 cp_page = grab_meta_page(sbi, start_blk);
765 kaddr = page_address(cp_page);
766 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
767 set_page_dirty(cp_page);
768 f2fs_put_page(cp_page, 1);
770 /* wait for previous submitted node/meta pages writeback */
771 wait_on_all_pages_writeback(sbi);
773 filemap_fdatawait_range(sbi->node_inode->i_mapping, 0, LONG_MAX);
774 filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
776 /* update user_block_counts */
777 sbi->last_valid_block_count = sbi->total_valid_block_count;
778 sbi->alloc_valid_block_count = 0;
780 /* Here, we only have one bio having CP pack */
781 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
783 if (unlikely(!is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) {
784 clear_prefree_segments(sbi);
785 F2FS_RESET_SB_DIRT(sbi);
790 * We guarantee that this checkpoint procedure should not fail.
792 void write_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
794 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
795 unsigned long long ckpt_ver;
797 trace_f2fs_write_checkpoint(sbi->sb, is_umount, "start block_ops");
799 mutex_lock(&sbi->cp_mutex);
800 block_operations(sbi);
802 trace_f2fs_write_checkpoint(sbi->sb, is_umount, "finish block_ops");
804 f2fs_submit_merged_bio(sbi, DATA, WRITE);
805 f2fs_submit_merged_bio(sbi, NODE, WRITE);
806 f2fs_submit_merged_bio(sbi, META, WRITE);
809 * update checkpoint pack index
810 * Increase the version number so that
811 * SIT entries and seg summaries are written at correct place
813 ckpt_ver = cur_cp_version(ckpt);
814 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
816 /* write cached NAT/SIT entries to NAT/SIT area */
817 flush_nat_entries(sbi);
818 flush_sit_entries(sbi);
820 /* unlock all the fs_lock[] in do_checkpoint() */
821 do_checkpoint(sbi, is_umount);
823 unblock_operations(sbi);
824 mutex_unlock(&sbi->cp_mutex);
826 trace_f2fs_write_checkpoint(sbi->sb, is_umount, "finish checkpoint");
829 void init_orphan_info(struct f2fs_sb_info *sbi)
831 spin_lock_init(&sbi->orphan_inode_lock);
832 INIT_LIST_HEAD(&sbi->orphan_inode_list);
835 * considering 512 blocks in a segment 8 blocks are needed for cp
836 * and log segment summaries. Remaining blocks are used to keep
837 * orphan entries with the limitation one reserved segment
838 * for cp pack we can have max 1020*504 orphan entries
840 sbi->max_orphans = (sbi->blocks_per_seg - 2 - NR_CURSEG_TYPE)
841 * F2FS_ORPHANS_PER_BLOCK;
844 int __init create_checkpoint_caches(void)
846 orphan_entry_slab = f2fs_kmem_cache_create("f2fs_orphan_entry",
847 sizeof(struct orphan_inode_entry), NULL);
848 if (!orphan_entry_slab)
850 inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
851 sizeof(struct dir_inode_entry), NULL);
852 if (!inode_entry_slab) {
853 kmem_cache_destroy(orphan_entry_slab);
859 void destroy_checkpoint_caches(void)
861 kmem_cache_destroy(orphan_entry_slab);
862 kmem_cache_destroy(inode_entry_slab);