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 inline int get_max_meta_blks(struct f2fs_sb_info *sbi, int type)
82 return NM_I(sbi)->max_nid / NAT_ENTRY_PER_BLOCK;
84 return SIT_BLK_CNT(sbi);
93 * Readahead CP/NAT/SIT pages
95 int ra_meta_pages(struct f2fs_sb_info *sbi, int start, int nrpages, int type)
97 block_t prev_blk_addr = 0;
100 int max_blks = get_max_meta_blks(sbi, type);
102 struct f2fs_io_info fio = {
104 .rw = READ_SYNC | REQ_META | REQ_PRIO
107 for (; nrpages-- > 0; blkno++) {
112 /* get nat block addr */
113 if (unlikely(blkno >= max_blks))
115 blk_addr = current_nat_addr(sbi,
116 blkno * NAT_ENTRY_PER_BLOCK);
119 /* get sit block addr */
120 if (unlikely(blkno >= max_blks))
122 blk_addr = current_sit_addr(sbi,
123 blkno * SIT_ENTRY_PER_BLOCK);
124 if (blkno != start && prev_blk_addr + 1 != blk_addr)
126 prev_blk_addr = blk_addr;
129 /* get cp block addr */
136 page = grab_cache_page(META_MAPPING(sbi), blk_addr);
139 if (PageUptodate(page)) {
140 mark_page_accessed(page);
141 f2fs_put_page(page, 1);
145 f2fs_submit_page_mbio(sbi, page, blk_addr, &fio);
146 mark_page_accessed(page);
147 f2fs_put_page(page, 0);
150 f2fs_submit_merged_bio(sbi, META, READ);
151 return blkno - start;
154 static int f2fs_write_meta_page(struct page *page,
155 struct writeback_control *wbc)
157 struct inode *inode = page->mapping->host;
158 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
160 if (unlikely(sbi->por_doing))
162 if (wbc->for_reclaim)
165 /* Should not write any meta pages, if any IO error was occurred */
166 if (unlikely(is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ERROR_FLAG)))
169 wait_on_page_writeback(page);
170 write_meta_page(sbi, page);
172 dec_page_count(sbi, F2FS_DIRTY_META);
177 dec_page_count(sbi, F2FS_DIRTY_META);
178 wbc->pages_skipped++;
179 set_page_dirty(page);
180 return AOP_WRITEPAGE_ACTIVATE;
183 static int f2fs_write_meta_pages(struct address_space *mapping,
184 struct writeback_control *wbc)
186 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
187 int nrpages = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
190 if (wbc->for_kupdate)
193 /* collect a number of dirty meta pages and write together */
194 if (get_pages(sbi, F2FS_DIRTY_META) < nrpages)
197 /* if mounting is failed, skip writing node pages */
198 mutex_lock(&sbi->cp_mutex);
199 written = sync_meta_pages(sbi, META, nrpages);
200 mutex_unlock(&sbi->cp_mutex);
201 wbc->nr_to_write -= written;
205 long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
208 struct address_space *mapping = META_MAPPING(sbi);
209 pgoff_t index = 0, end = LONG_MAX;
212 struct writeback_control wbc = {
216 pagevec_init(&pvec, 0);
218 while (index <= end) {
220 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
222 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
223 if (unlikely(nr_pages == 0))
226 for (i = 0; i < nr_pages; i++) {
227 struct page *page = pvec.pages[i];
231 if (unlikely(page->mapping != mapping)) {
236 if (!PageDirty(page)) {
237 /* someone wrote it for us */
238 goto continue_unlock;
241 if (!clear_page_dirty_for_io(page))
242 goto continue_unlock;
244 if (f2fs_write_meta_page(page, &wbc)) {
249 if (unlikely(nwritten >= nr_to_write))
252 pagevec_release(&pvec);
257 f2fs_submit_merged_bio(sbi, type, WRITE);
262 static int f2fs_set_meta_page_dirty(struct page *page)
264 struct address_space *mapping = page->mapping;
265 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
267 trace_f2fs_set_page_dirty(page, META);
269 SetPageUptodate(page);
270 if (!PageDirty(page)) {
271 __set_page_dirty_nobuffers(page);
272 inc_page_count(sbi, F2FS_DIRTY_META);
278 const struct address_space_operations f2fs_meta_aops = {
279 .writepage = f2fs_write_meta_page,
280 .writepages = f2fs_write_meta_pages,
281 .set_page_dirty = f2fs_set_meta_page_dirty,
284 int acquire_orphan_inode(struct f2fs_sb_info *sbi)
288 spin_lock(&sbi->orphan_inode_lock);
289 if (unlikely(sbi->n_orphans >= sbi->max_orphans))
293 spin_unlock(&sbi->orphan_inode_lock);
298 void release_orphan_inode(struct f2fs_sb_info *sbi)
300 spin_lock(&sbi->orphan_inode_lock);
301 f2fs_bug_on(sbi->n_orphans == 0);
303 spin_unlock(&sbi->orphan_inode_lock);
306 void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
308 struct list_head *head, *this;
309 struct orphan_inode_entry *new = NULL, *orphan = NULL;
311 new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
314 spin_lock(&sbi->orphan_inode_lock);
315 head = &sbi->orphan_inode_list;
316 list_for_each(this, head) {
317 orphan = list_entry(this, struct orphan_inode_entry, list);
318 if (orphan->ino == ino) {
319 spin_unlock(&sbi->orphan_inode_lock);
320 kmem_cache_free(orphan_entry_slab, new);
324 if (orphan->ino > ino)
329 /* add new_oentry into list which is sorted by inode number */
331 list_add(&new->list, this->prev);
333 list_add_tail(&new->list, head);
334 spin_unlock(&sbi->orphan_inode_lock);
337 void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
339 struct list_head *head;
340 struct orphan_inode_entry *orphan;
342 spin_lock(&sbi->orphan_inode_lock);
343 head = &sbi->orphan_inode_list;
344 list_for_each_entry(orphan, head, list) {
345 if (orphan->ino == ino) {
346 list_del(&orphan->list);
347 kmem_cache_free(orphan_entry_slab, orphan);
348 f2fs_bug_on(sbi->n_orphans == 0);
353 spin_unlock(&sbi->orphan_inode_lock);
356 static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
358 struct inode *inode = f2fs_iget(sbi->sb, ino);
359 f2fs_bug_on(IS_ERR(inode));
362 /* truncate all the data during iput */
366 void recover_orphan_inodes(struct f2fs_sb_info *sbi)
368 block_t start_blk, orphan_blkaddr, i, j;
370 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
373 sbi->por_doing = true;
374 start_blk = __start_cp_addr(sbi) + 1;
375 orphan_blkaddr = __start_sum_addr(sbi) - 1;
377 ra_meta_pages(sbi, start_blk, orphan_blkaddr, META_CP);
379 for (i = 0; i < orphan_blkaddr; i++) {
380 struct page *page = get_meta_page(sbi, start_blk + i);
381 struct f2fs_orphan_block *orphan_blk;
383 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
384 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
385 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
386 recover_orphan_inode(sbi, ino);
388 f2fs_put_page(page, 1);
390 /* clear Orphan Flag */
391 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
392 sbi->por_doing = false;
396 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
398 struct list_head *head;
399 struct f2fs_orphan_block *orphan_blk = NULL;
400 unsigned int nentries = 0;
401 unsigned short index;
402 unsigned short orphan_blocks = (unsigned short)((sbi->n_orphans +
403 (F2FS_ORPHANS_PER_BLOCK - 1)) / F2FS_ORPHANS_PER_BLOCK);
404 struct page *page = NULL;
405 struct orphan_inode_entry *orphan = NULL;
407 for (index = 0; index < orphan_blocks; index++)
408 grab_meta_page(sbi, start_blk + index);
411 spin_lock(&sbi->orphan_inode_lock);
412 head = &sbi->orphan_inode_list;
414 /* loop for each orphan inode entry and write them in Jornal block */
415 list_for_each_entry(orphan, head, list) {
417 page = find_get_page(META_MAPPING(sbi), start_blk++);
420 (struct f2fs_orphan_block *)page_address(page);
421 memset(orphan_blk, 0, sizeof(*orphan_blk));
422 f2fs_put_page(page, 0);
425 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
427 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
429 * an orphan block is full of 1020 entries,
430 * then we need to flush current orphan blocks
431 * and bring another one in memory
433 orphan_blk->blk_addr = cpu_to_le16(index);
434 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
435 orphan_blk->entry_count = cpu_to_le32(nentries);
436 set_page_dirty(page);
437 f2fs_put_page(page, 1);
445 orphan_blk->blk_addr = cpu_to_le16(index);
446 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
447 orphan_blk->entry_count = cpu_to_le32(nentries);
448 set_page_dirty(page);
449 f2fs_put_page(page, 1);
452 spin_unlock(&sbi->orphan_inode_lock);
455 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
456 block_t cp_addr, unsigned long long *version)
458 struct page *cp_page_1, *cp_page_2 = NULL;
459 unsigned long blk_size = sbi->blocksize;
460 struct f2fs_checkpoint *cp_block;
461 unsigned long long cur_version = 0, pre_version = 0;
465 /* Read the 1st cp block in this CP pack */
466 cp_page_1 = get_meta_page(sbi, cp_addr);
468 /* get the version number */
469 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
470 crc_offset = le32_to_cpu(cp_block->checksum_offset);
471 if (crc_offset >= blk_size)
474 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
475 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
478 pre_version = cur_cp_version(cp_block);
480 /* Read the 2nd cp block in this CP pack */
481 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
482 cp_page_2 = get_meta_page(sbi, cp_addr);
484 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
485 crc_offset = le32_to_cpu(cp_block->checksum_offset);
486 if (crc_offset >= blk_size)
489 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
490 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
493 cur_version = cur_cp_version(cp_block);
495 if (cur_version == pre_version) {
496 *version = cur_version;
497 f2fs_put_page(cp_page_2, 1);
501 f2fs_put_page(cp_page_2, 1);
503 f2fs_put_page(cp_page_1, 1);
507 int get_valid_checkpoint(struct f2fs_sb_info *sbi)
509 struct f2fs_checkpoint *cp_block;
510 struct f2fs_super_block *fsb = sbi->raw_super;
511 struct page *cp1, *cp2, *cur_page;
512 unsigned long blk_size = sbi->blocksize;
513 unsigned long long cp1_version = 0, cp2_version = 0;
514 unsigned long long cp_start_blk_no;
516 sbi->ckpt = kzalloc(blk_size, GFP_KERNEL);
520 * Finding out valid cp block involves read both
521 * sets( cp pack1 and cp pack 2)
523 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
524 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
526 /* The second checkpoint pack should start at the next segment */
527 cp_start_blk_no += ((unsigned long long)1) <<
528 le32_to_cpu(fsb->log_blocks_per_seg);
529 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
532 if (ver_after(cp2_version, cp1_version))
544 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
545 memcpy(sbi->ckpt, cp_block, blk_size);
547 f2fs_put_page(cp1, 1);
548 f2fs_put_page(cp2, 1);
556 static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new)
558 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
559 struct list_head *head = &sbi->dir_inode_list;
560 struct list_head *this;
562 list_for_each(this, head) {
563 struct dir_inode_entry *entry;
564 entry = list_entry(this, struct dir_inode_entry, list);
565 if (unlikely(entry->inode == inode))
568 list_add_tail(&new->list, head);
569 stat_inc_dirty_dir(sbi);
573 void set_dirty_dir_page(struct inode *inode, struct page *page)
575 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
576 struct dir_inode_entry *new;
578 if (!S_ISDIR(inode->i_mode))
581 new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
583 INIT_LIST_HEAD(&new->list);
585 spin_lock(&sbi->dir_inode_lock);
586 if (__add_dirty_inode(inode, new))
587 kmem_cache_free(inode_entry_slab, new);
589 inode_inc_dirty_dents(inode);
590 SetPagePrivate(page);
591 spin_unlock(&sbi->dir_inode_lock);
594 void add_dirty_dir_inode(struct inode *inode)
596 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
597 struct dir_inode_entry *new =
598 f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
601 INIT_LIST_HEAD(&new->list);
603 spin_lock(&sbi->dir_inode_lock);
604 if (__add_dirty_inode(inode, new))
605 kmem_cache_free(inode_entry_slab, new);
606 spin_unlock(&sbi->dir_inode_lock);
609 void remove_dirty_dir_inode(struct inode *inode)
611 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
613 struct list_head *this, *head;
615 if (!S_ISDIR(inode->i_mode))
618 spin_lock(&sbi->dir_inode_lock);
619 if (atomic_read(&F2FS_I(inode)->dirty_dents)) {
620 spin_unlock(&sbi->dir_inode_lock);
624 head = &sbi->dir_inode_list;
625 list_for_each(this, head) {
626 struct dir_inode_entry *entry;
627 entry = list_entry(this, struct dir_inode_entry, list);
628 if (entry->inode == inode) {
629 list_del(&entry->list);
630 kmem_cache_free(inode_entry_slab, entry);
631 stat_dec_dirty_dir(sbi);
635 spin_unlock(&sbi->dir_inode_lock);
637 /* Only from the recovery routine */
638 if (is_inode_flag_set(F2FS_I(inode), FI_DELAY_IPUT)) {
639 clear_inode_flag(F2FS_I(inode), FI_DELAY_IPUT);
644 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *sbi, nid_t ino)
647 struct list_head *this, *head;
648 struct inode *inode = NULL;
650 spin_lock(&sbi->dir_inode_lock);
652 head = &sbi->dir_inode_list;
653 list_for_each(this, head) {
654 struct dir_inode_entry *entry;
655 entry = list_entry(this, struct dir_inode_entry, list);
656 if (entry->inode->i_ino == ino) {
657 inode = entry->inode;
661 spin_unlock(&sbi->dir_inode_lock);
665 void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
667 struct list_head *head;
668 struct dir_inode_entry *entry;
671 spin_lock(&sbi->dir_inode_lock);
673 head = &sbi->dir_inode_list;
674 if (list_empty(head)) {
675 spin_unlock(&sbi->dir_inode_lock);
678 entry = list_entry(head->next, struct dir_inode_entry, list);
679 inode = igrab(entry->inode);
680 spin_unlock(&sbi->dir_inode_lock);
682 filemap_flush(inode->i_mapping);
686 * We should submit bio, since it exists several
687 * wribacking dentry pages in the freeing inode.
689 f2fs_submit_merged_bio(sbi, DATA, WRITE);
695 * Freeze all the FS-operations for checkpoint.
697 static void block_operations(struct f2fs_sb_info *sbi)
699 struct writeback_control wbc = {
700 .sync_mode = WB_SYNC_ALL,
701 .nr_to_write = LONG_MAX,
704 struct blk_plug plug;
706 blk_start_plug(&plug);
710 /* write all the dirty dentry pages */
711 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
712 f2fs_unlock_all(sbi);
713 sync_dirty_dir_inodes(sbi);
714 goto retry_flush_dents;
718 * POR: we should ensure that there is no dirty node pages
719 * until finishing nat/sit flush.
722 mutex_lock(&sbi->node_write);
724 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
725 mutex_unlock(&sbi->node_write);
726 sync_node_pages(sbi, 0, &wbc);
727 goto retry_flush_nodes;
729 blk_finish_plug(&plug);
732 static void unblock_operations(struct f2fs_sb_info *sbi)
734 mutex_unlock(&sbi->node_write);
735 f2fs_unlock_all(sbi);
738 static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
743 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
745 if (!get_pages(sbi, F2FS_WRITEBACK))
750 finish_wait(&sbi->cp_wait, &wait);
753 static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
755 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
758 struct page *cp_page;
759 unsigned int data_sum_blocks, orphan_blocks;
764 /* Flush all the NAT/SIT pages */
765 while (get_pages(sbi, F2FS_DIRTY_META))
766 sync_meta_pages(sbi, META, LONG_MAX);
768 next_free_nid(sbi, &last_nid);
772 * version number is already updated
774 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
775 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
776 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
777 for (i = 0; i < 3; i++) {
778 ckpt->cur_node_segno[i] =
779 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
780 ckpt->cur_node_blkoff[i] =
781 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
782 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
783 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
785 for (i = 0; i < 3; i++) {
786 ckpt->cur_data_segno[i] =
787 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
788 ckpt->cur_data_blkoff[i] =
789 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
790 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
791 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
794 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
795 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
796 ckpt->next_free_nid = cpu_to_le32(last_nid);
798 /* 2 cp + n data seg summary + orphan inode blocks */
799 data_sum_blocks = npages_for_summary_flush(sbi);
800 if (data_sum_blocks < 3)
801 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
803 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
805 orphan_blocks = (sbi->n_orphans + F2FS_ORPHANS_PER_BLOCK - 1)
806 / F2FS_ORPHANS_PER_BLOCK;
807 ckpt->cp_pack_start_sum = cpu_to_le32(1 + orphan_blocks);
810 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
811 ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
812 data_sum_blocks + orphan_blocks + NR_CURSEG_NODE_TYPE);
814 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
815 ckpt->cp_pack_total_block_count = cpu_to_le32(2 +
816 data_sum_blocks + orphan_blocks);
820 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
822 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
824 /* update SIT/NAT bitmap */
825 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
826 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
828 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
829 *((__le32 *)((unsigned char *)ckpt +
830 le32_to_cpu(ckpt->checksum_offset)))
831 = cpu_to_le32(crc32);
833 start_blk = __start_cp_addr(sbi);
835 /* write out checkpoint buffer at block 0 */
836 cp_page = grab_meta_page(sbi, start_blk++);
837 kaddr = page_address(cp_page);
838 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
839 set_page_dirty(cp_page);
840 f2fs_put_page(cp_page, 1);
842 if (sbi->n_orphans) {
843 write_orphan_inodes(sbi, start_blk);
844 start_blk += orphan_blocks;
847 write_data_summaries(sbi, start_blk);
848 start_blk += data_sum_blocks;
850 write_node_summaries(sbi, start_blk);
851 start_blk += NR_CURSEG_NODE_TYPE;
854 /* writeout checkpoint block */
855 cp_page = grab_meta_page(sbi, start_blk);
856 kaddr = page_address(cp_page);
857 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
858 set_page_dirty(cp_page);
859 f2fs_put_page(cp_page, 1);
861 /* wait for previous submitted node/meta pages writeback */
862 wait_on_all_pages_writeback(sbi);
864 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
865 filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
867 /* update user_block_counts */
868 sbi->last_valid_block_count = sbi->total_valid_block_count;
869 sbi->alloc_valid_block_count = 0;
871 /* Here, we only have one bio having CP pack */
872 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
874 if (unlikely(!is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) {
875 clear_prefree_segments(sbi);
876 F2FS_RESET_SB_DIRT(sbi);
881 * We guarantee that this checkpoint procedure should not fail.
883 void write_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
885 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
886 unsigned long long ckpt_ver;
888 trace_f2fs_write_checkpoint(sbi->sb, is_umount, "start block_ops");
890 mutex_lock(&sbi->cp_mutex);
891 block_operations(sbi);
893 trace_f2fs_write_checkpoint(sbi->sb, is_umount, "finish block_ops");
895 f2fs_submit_merged_bio(sbi, DATA, WRITE);
896 f2fs_submit_merged_bio(sbi, NODE, WRITE);
897 f2fs_submit_merged_bio(sbi, META, WRITE);
900 * update checkpoint pack index
901 * Increase the version number so that
902 * SIT entries and seg summaries are written at correct place
904 ckpt_ver = cur_cp_version(ckpt);
905 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
907 /* write cached NAT/SIT entries to NAT/SIT area */
908 flush_nat_entries(sbi);
909 flush_sit_entries(sbi);
911 /* unlock all the fs_lock[] in do_checkpoint() */
912 do_checkpoint(sbi, is_umount);
914 unblock_operations(sbi);
915 mutex_unlock(&sbi->cp_mutex);
917 trace_f2fs_write_checkpoint(sbi->sb, is_umount, "finish checkpoint");
920 void init_orphan_info(struct f2fs_sb_info *sbi)
922 spin_lock_init(&sbi->orphan_inode_lock);
923 INIT_LIST_HEAD(&sbi->orphan_inode_list);
926 * considering 512 blocks in a segment 8 blocks are needed for cp
927 * and log segment summaries. Remaining blocks are used to keep
928 * orphan entries with the limitation one reserved segment
929 * for cp pack we can have max 1020*504 orphan entries
931 sbi->max_orphans = (sbi->blocks_per_seg - 2 - NR_CURSEG_TYPE)
932 * F2FS_ORPHANS_PER_BLOCK;
935 int __init create_checkpoint_caches(void)
937 orphan_entry_slab = f2fs_kmem_cache_create("f2fs_orphan_entry",
938 sizeof(struct orphan_inode_entry), NULL);
939 if (!orphan_entry_slab)
941 inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
942 sizeof(struct dir_inode_entry), NULL);
943 if (!inode_entry_slab) {
944 kmem_cache_destroy(orphan_entry_slab);
950 void destroy_checkpoint_caches(void)
952 kmem_cache_destroy(orphan_entry_slab);
953 kmem_cache_destroy(inode_entry_slab);