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>
24 #include <trace/events/f2fs.h>
26 static struct kmem_cache *ino_entry_slab;
27 struct kmem_cache *inode_entry_slab;
30 * We guarantee no failure on the returned page.
32 struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
34 struct address_space *mapping = META_MAPPING(sbi);
35 struct page *page = NULL;
37 page = grab_cache_page(mapping, index);
42 f2fs_wait_on_page_writeback(page, META, true);
43 SetPageUptodate(page);
48 * We guarantee no failure on the returned page.
50 static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
53 struct address_space *mapping = META_MAPPING(sbi);
55 struct f2fs_io_info fio = {
58 .rw = READ_SYNC | REQ_META | REQ_PRIO,
60 .encrypted_page = NULL,
63 if (unlikely(!is_meta))
66 page = grab_cache_page(mapping, index);
71 if (PageUptodate(page))
76 if (f2fs_submit_page_bio(&fio)) {
77 f2fs_put_page(page, 1);
82 if (unlikely(page->mapping != mapping)) {
83 f2fs_put_page(page, 1);
88 * if there is any IO error when accessing device, make our filesystem
89 * readonly and make sure do not write checkpoint with non-uptodate
92 if (unlikely(!PageUptodate(page)))
93 f2fs_stop_checkpoint(sbi);
98 struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
100 return __get_meta_page(sbi, index, true);
104 struct page *get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
106 return __get_meta_page(sbi, index, false);
109 bool is_valid_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr, int type)
115 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
119 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
120 blkaddr < SM_I(sbi)->ssa_blkaddr))
124 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
125 blkaddr < __start_cp_addr(sbi)))
129 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
130 blkaddr < MAIN_BLKADDR(sbi)))
141 * Readahead CP/NAT/SIT/SSA pages
143 int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
146 block_t prev_blk_addr = 0;
148 block_t blkno = start;
149 struct f2fs_io_info fio = {
152 .rw = sync ? (READ_SYNC | REQ_META | REQ_PRIO) : READA,
153 .encrypted_page = NULL,
156 if (unlikely(type == META_POR))
159 for (; nrpages-- > 0; blkno++) {
161 if (!is_valid_blkaddr(sbi, blkno, type))
166 if (unlikely(blkno >=
167 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
169 /* get nat block addr */
170 fio.blk_addr = current_nat_addr(sbi,
171 blkno * NAT_ENTRY_PER_BLOCK);
174 /* get sit block addr */
175 fio.blk_addr = current_sit_addr(sbi,
176 blkno * SIT_ENTRY_PER_BLOCK);
177 if (blkno != start && prev_blk_addr + 1 != fio.blk_addr)
179 prev_blk_addr = fio.blk_addr;
184 fio.blk_addr = blkno;
190 page = grab_cache_page(META_MAPPING(sbi), fio.blk_addr);
193 if (PageUptodate(page)) {
194 f2fs_put_page(page, 1);
199 f2fs_submit_page_mbio(&fio);
200 f2fs_put_page(page, 0);
203 f2fs_submit_merged_bio(sbi, META, READ);
204 return blkno - start;
207 void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
210 bool readahead = false;
212 page = find_get_page(META_MAPPING(sbi), index);
213 if (!page || (page && !PageUptodate(page)))
215 f2fs_put_page(page, 0);
218 ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR, true);
221 static int f2fs_write_meta_page(struct page *page,
222 struct writeback_control *wbc)
224 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
226 trace_f2fs_writepage(page, META);
228 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
230 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
232 if (unlikely(f2fs_cp_error(sbi)))
235 write_meta_page(sbi, page);
236 dec_page_count(sbi, F2FS_DIRTY_META);
238 if (wbc->for_reclaim)
239 f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, META, WRITE);
243 if (unlikely(f2fs_cp_error(sbi)))
244 f2fs_submit_merged_bio(sbi, META, WRITE);
249 redirty_page_for_writepage(wbc, page);
250 return AOP_WRITEPAGE_ACTIVATE;
253 static int f2fs_write_meta_pages(struct address_space *mapping,
254 struct writeback_control *wbc)
256 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
259 /* collect a number of dirty meta pages and write together */
260 if (wbc->for_kupdate ||
261 get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
264 trace_f2fs_writepages(mapping->host, wbc, META);
266 /* if mounting is failed, skip writing node pages */
267 mutex_lock(&sbi->cp_mutex);
268 diff = nr_pages_to_write(sbi, META, wbc);
269 written = sync_meta_pages(sbi, META, wbc->nr_to_write);
270 mutex_unlock(&sbi->cp_mutex);
271 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
275 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
276 trace_f2fs_writepages(mapping->host, wbc, META);
280 long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
283 struct address_space *mapping = META_MAPPING(sbi);
284 pgoff_t index = 0, end = LONG_MAX, prev = LONG_MAX;
287 struct writeback_control wbc = {
291 pagevec_init(&pvec, 0);
293 while (index <= end) {
295 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
297 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
298 if (unlikely(nr_pages == 0))
301 for (i = 0; i < nr_pages; i++) {
302 struct page *page = pvec.pages[i];
304 if (prev == LONG_MAX)
305 prev = page->index - 1;
306 if (nr_to_write != LONG_MAX && page->index != prev + 1) {
307 pagevec_release(&pvec);
313 if (unlikely(page->mapping != mapping)) {
318 if (!PageDirty(page)) {
319 /* someone wrote it for us */
320 goto continue_unlock;
323 f2fs_wait_on_page_writeback(page, META, true);
325 BUG_ON(PageWriteback(page));
326 if (!clear_page_dirty_for_io(page))
327 goto continue_unlock;
329 if (mapping->a_ops->writepage(page, &wbc)) {
335 if (unlikely(nwritten >= nr_to_write))
338 pagevec_release(&pvec);
343 f2fs_submit_merged_bio(sbi, type, WRITE);
348 static int f2fs_set_meta_page_dirty(struct page *page)
350 trace_f2fs_set_page_dirty(page, META);
352 SetPageUptodate(page);
353 if (!PageDirty(page)) {
354 __set_page_dirty_nobuffers(page);
355 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
356 SetPagePrivate(page);
357 f2fs_trace_pid(page);
363 const struct address_space_operations f2fs_meta_aops = {
364 .writepage = f2fs_write_meta_page,
365 .writepages = f2fs_write_meta_pages,
366 .set_page_dirty = f2fs_set_meta_page_dirty,
367 .invalidatepage = f2fs_invalidate_page,
368 .releasepage = f2fs_release_page,
371 static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
373 struct inode_management *im = &sbi->im[type];
374 struct ino_entry *e, *tmp;
376 tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
378 radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
380 spin_lock(&im->ino_lock);
381 e = radix_tree_lookup(&im->ino_root, ino);
384 if (radix_tree_insert(&im->ino_root, ino, e)) {
385 spin_unlock(&im->ino_lock);
386 radix_tree_preload_end();
389 memset(e, 0, sizeof(struct ino_entry));
392 list_add_tail(&e->list, &im->ino_list);
393 if (type != ORPHAN_INO)
396 spin_unlock(&im->ino_lock);
397 radix_tree_preload_end();
400 kmem_cache_free(ino_entry_slab, tmp);
403 static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
405 struct inode_management *im = &sbi->im[type];
408 spin_lock(&im->ino_lock);
409 e = radix_tree_lookup(&im->ino_root, ino);
412 radix_tree_delete(&im->ino_root, ino);
414 spin_unlock(&im->ino_lock);
415 kmem_cache_free(ino_entry_slab, e);
418 spin_unlock(&im->ino_lock);
421 void add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
423 /* add new dirty ino entry into list */
424 __add_ino_entry(sbi, ino, type);
427 void remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
429 /* remove dirty ino entry from list */
430 __remove_ino_entry(sbi, ino, type);
433 /* mode should be APPEND_INO or UPDATE_INO */
434 bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
436 struct inode_management *im = &sbi->im[mode];
439 spin_lock(&im->ino_lock);
440 e = radix_tree_lookup(&im->ino_root, ino);
441 spin_unlock(&im->ino_lock);
442 return e ? true : false;
445 void release_ino_entry(struct f2fs_sb_info *sbi)
447 struct ino_entry *e, *tmp;
450 for (i = APPEND_INO; i <= UPDATE_INO; i++) {
451 struct inode_management *im = &sbi->im[i];
453 spin_lock(&im->ino_lock);
454 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
456 radix_tree_delete(&im->ino_root, e->ino);
457 kmem_cache_free(ino_entry_slab, e);
460 spin_unlock(&im->ino_lock);
464 int acquire_orphan_inode(struct f2fs_sb_info *sbi)
466 struct inode_management *im = &sbi->im[ORPHAN_INO];
469 spin_lock(&im->ino_lock);
470 if (unlikely(im->ino_num >= sbi->max_orphans))
474 spin_unlock(&im->ino_lock);
479 void release_orphan_inode(struct f2fs_sb_info *sbi)
481 struct inode_management *im = &sbi->im[ORPHAN_INO];
483 spin_lock(&im->ino_lock);
484 f2fs_bug_on(sbi, im->ino_num == 0);
486 spin_unlock(&im->ino_lock);
489 void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
491 /* add new orphan ino entry into list */
492 __add_ino_entry(sbi, ino, ORPHAN_INO);
495 void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
497 /* remove orphan entry from orphan list */
498 __remove_ino_entry(sbi, ino, ORPHAN_INO);
501 static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
505 inode = f2fs_iget(sbi->sb, ino);
508 * there should be a bug that we can't find the entry
511 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
512 return PTR_ERR(inode);
517 /* truncate all the data during iput */
522 int recover_orphan_inodes(struct f2fs_sb_info *sbi)
524 block_t start_blk, orphan_blocks, i, j;
527 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
530 start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
531 orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
533 ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
535 for (i = 0; i < orphan_blocks; i++) {
536 struct page *page = get_meta_page(sbi, start_blk + i);
537 struct f2fs_orphan_block *orphan_blk;
539 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
540 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
541 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
542 err = recover_orphan_inode(sbi, ino);
544 f2fs_put_page(page, 1);
548 f2fs_put_page(page, 1);
550 /* clear Orphan Flag */
551 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
555 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
557 struct list_head *head;
558 struct f2fs_orphan_block *orphan_blk = NULL;
559 unsigned int nentries = 0;
560 unsigned short index = 1;
561 unsigned short orphan_blocks;
562 struct page *page = NULL;
563 struct ino_entry *orphan = NULL;
564 struct inode_management *im = &sbi->im[ORPHAN_INO];
566 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
569 * we don't need to do spin_lock(&im->ino_lock) here, since all the
570 * orphan inode operations are covered under f2fs_lock_op().
571 * And, spin_lock should be avoided due to page operations below.
573 head = &im->ino_list;
575 /* loop for each orphan inode entry and write them in Jornal block */
576 list_for_each_entry(orphan, head, list) {
578 page = grab_meta_page(sbi, start_blk++);
580 (struct f2fs_orphan_block *)page_address(page);
581 memset(orphan_blk, 0, sizeof(*orphan_blk));
584 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
586 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
588 * an orphan block is full of 1020 entries,
589 * then we need to flush current orphan blocks
590 * and bring another one in memory
592 orphan_blk->blk_addr = cpu_to_le16(index);
593 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
594 orphan_blk->entry_count = cpu_to_le32(nentries);
595 set_page_dirty(page);
596 f2fs_put_page(page, 1);
604 orphan_blk->blk_addr = cpu_to_le16(index);
605 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
606 orphan_blk->entry_count = cpu_to_le32(nentries);
607 set_page_dirty(page);
608 f2fs_put_page(page, 1);
612 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
613 block_t cp_addr, unsigned long long *version)
615 struct page *cp_page_1, *cp_page_2 = NULL;
616 unsigned long blk_size = sbi->blocksize;
617 struct f2fs_checkpoint *cp_block;
618 unsigned long long cur_version = 0, pre_version = 0;
622 /* Read the 1st cp block in this CP pack */
623 cp_page_1 = get_meta_page(sbi, cp_addr);
625 /* get the version number */
626 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
627 crc_offset = le32_to_cpu(cp_block->checksum_offset);
628 if (crc_offset >= blk_size)
631 crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
632 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
635 pre_version = cur_cp_version(cp_block);
637 /* Read the 2nd cp block in this CP pack */
638 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
639 cp_page_2 = get_meta_page(sbi, cp_addr);
641 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
642 crc_offset = le32_to_cpu(cp_block->checksum_offset);
643 if (crc_offset >= blk_size)
646 crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
647 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
650 cur_version = cur_cp_version(cp_block);
652 if (cur_version == pre_version) {
653 *version = cur_version;
654 f2fs_put_page(cp_page_2, 1);
658 f2fs_put_page(cp_page_2, 1);
660 f2fs_put_page(cp_page_1, 1);
664 int get_valid_checkpoint(struct f2fs_sb_info *sbi)
666 struct f2fs_checkpoint *cp_block;
667 struct f2fs_super_block *fsb = sbi->raw_super;
668 struct page *cp1, *cp2, *cur_page;
669 unsigned long blk_size = sbi->blocksize;
670 unsigned long long cp1_version = 0, cp2_version = 0;
671 unsigned long long cp_start_blk_no;
672 unsigned int cp_blks = 1 + __cp_payload(sbi);
676 sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
680 * Finding out valid cp block involves read both
681 * sets( cp pack1 and cp pack 2)
683 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
684 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
686 /* The second checkpoint pack should start at the next segment */
687 cp_start_blk_no += ((unsigned long long)1) <<
688 le32_to_cpu(fsb->log_blocks_per_seg);
689 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
692 if (ver_after(cp2_version, cp1_version))
704 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
705 memcpy(sbi->ckpt, cp_block, blk_size);
710 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
712 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
714 for (i = 1; i < cp_blks; i++) {
715 void *sit_bitmap_ptr;
716 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
718 cur_page = get_meta_page(sbi, cp_blk_no + i);
719 sit_bitmap_ptr = page_address(cur_page);
720 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
721 f2fs_put_page(cur_page, 1);
724 f2fs_put_page(cp1, 1);
725 f2fs_put_page(cp2, 1);
733 static void __add_dirty_inode(struct inode *inode, enum inode_type type)
735 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
736 struct f2fs_inode_info *fi = F2FS_I(inode);
737 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
739 if (is_inode_flag_set(fi, flag))
742 set_inode_flag(fi, flag);
743 list_add_tail(&fi->dirty_list, &sbi->inode_list[type]);
744 stat_inc_dirty_inode(sbi, type);
747 static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
749 struct f2fs_inode_info *fi = F2FS_I(inode);
750 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
752 if (get_dirty_pages(inode) ||
753 !is_inode_flag_set(F2FS_I(inode), flag))
756 list_del_init(&fi->dirty_list);
757 clear_inode_flag(fi, flag);
758 stat_dec_dirty_inode(F2FS_I_SB(inode), type);
761 void update_dirty_page(struct inode *inode, struct page *page)
763 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
764 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
766 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
767 !S_ISLNK(inode->i_mode))
770 spin_lock(&sbi->inode_lock[type]);
771 __add_dirty_inode(inode, type);
772 inode_inc_dirty_pages(inode);
773 spin_unlock(&sbi->inode_lock[type]);
775 SetPagePrivate(page);
776 f2fs_trace_pid(page);
779 void add_dirty_dir_inode(struct inode *inode)
781 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
783 spin_lock(&sbi->inode_lock[DIR_INODE]);
784 __add_dirty_inode(inode, DIR_INODE);
785 spin_unlock(&sbi->inode_lock[DIR_INODE]);
788 void remove_dirty_inode(struct inode *inode)
790 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
791 struct f2fs_inode_info *fi = F2FS_I(inode);
792 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
794 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
795 !S_ISLNK(inode->i_mode))
798 spin_lock(&sbi->inode_lock[type]);
799 __remove_dirty_inode(inode, type);
800 spin_unlock(&sbi->inode_lock[type]);
802 /* Only from the recovery routine */
803 if (is_inode_flag_set(fi, FI_DELAY_IPUT)) {
804 clear_inode_flag(fi, FI_DELAY_IPUT);
809 int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
811 struct list_head *head;
813 struct f2fs_inode_info *fi;
814 bool is_dir = (type == DIR_INODE);
816 trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
817 get_pages(sbi, is_dir ?
818 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
820 if (unlikely(f2fs_cp_error(sbi)))
823 spin_lock(&sbi->inode_lock[type]);
825 head = &sbi->inode_list[type];
826 if (list_empty(head)) {
827 spin_unlock(&sbi->inode_lock[type]);
828 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
829 get_pages(sbi, is_dir ?
830 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
833 fi = list_entry(head->next, struct f2fs_inode_info, dirty_list);
834 inode = igrab(&fi->vfs_inode);
835 spin_unlock(&sbi->inode_lock[type]);
837 filemap_fdatawrite(inode->i_mapping);
841 * We should submit bio, since it exists several
842 * wribacking dentry pages in the freeing inode.
844 f2fs_submit_merged_bio(sbi, DATA, WRITE);
851 * Freeze all the FS-operations for checkpoint.
853 static int block_operations(struct f2fs_sb_info *sbi)
855 struct writeback_control wbc = {
856 .sync_mode = WB_SYNC_ALL,
857 .nr_to_write = LONG_MAX,
860 struct blk_plug plug;
863 blk_start_plug(&plug);
867 /* write all the dirty dentry pages */
868 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
869 f2fs_unlock_all(sbi);
870 err = sync_dirty_inodes(sbi, DIR_INODE);
873 goto retry_flush_dents;
877 * POR: we should ensure that there are no dirty node pages
878 * until finishing nat/sit flush.
881 down_write(&sbi->node_write);
883 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
884 up_write(&sbi->node_write);
885 err = sync_node_pages(sbi, 0, &wbc);
887 f2fs_unlock_all(sbi);
890 goto retry_flush_nodes;
893 blk_finish_plug(&plug);
897 static void unblock_operations(struct f2fs_sb_info *sbi)
899 up_write(&sbi->node_write);
900 f2fs_unlock_all(sbi);
903 static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
908 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
910 if (!get_pages(sbi, F2FS_WRITEBACK))
915 finish_wait(&sbi->cp_wait, &wait);
918 static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
920 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
921 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
922 struct f2fs_nm_info *nm_i = NM_I(sbi);
923 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
924 nid_t last_nid = nm_i->next_scan_nid;
926 unsigned int data_sum_blocks, orphan_blocks;
929 int cp_payload_blks = __cp_payload(sbi);
930 block_t discard_blk = NEXT_FREE_BLKADDR(sbi, curseg);
931 bool invalidate = false;
932 struct super_block *sb = sbi->sb;
933 struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
937 * This avoids to conduct wrong roll-forward operations and uses
938 * metapages, so should be called prior to sync_meta_pages below.
940 if (discard_next_dnode(sbi, discard_blk))
943 /* Flush all the NAT/SIT pages */
944 while (get_pages(sbi, F2FS_DIRTY_META)) {
945 sync_meta_pages(sbi, META, LONG_MAX);
946 if (unlikely(f2fs_cp_error(sbi)))
950 next_free_nid(sbi, &last_nid);
954 * version number is already updated
956 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
957 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
958 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
959 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
960 ckpt->cur_node_segno[i] =
961 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
962 ckpt->cur_node_blkoff[i] =
963 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
964 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
965 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
967 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
968 ckpt->cur_data_segno[i] =
969 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
970 ckpt->cur_data_blkoff[i] =
971 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
972 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
973 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
976 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
977 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
978 ckpt->next_free_nid = cpu_to_le32(last_nid);
980 /* 2 cp + n data seg summary + orphan inode blocks */
981 data_sum_blocks = npages_for_summary_flush(sbi, false);
982 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
983 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
985 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
987 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
988 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
991 if (__remain_node_summaries(cpc->reason))
992 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
993 cp_payload_blks + data_sum_blocks +
994 orphan_blocks + NR_CURSEG_NODE_TYPE);
996 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
997 cp_payload_blks + data_sum_blocks +
1000 if (cpc->reason == CP_UMOUNT)
1001 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1003 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1005 if (cpc->reason == CP_FASTBOOT)
1006 set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1008 clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1011 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1013 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1015 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
1016 set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1018 /* update SIT/NAT bitmap */
1019 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1020 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1022 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
1023 *((__le32 *)((unsigned char *)ckpt +
1024 le32_to_cpu(ckpt->checksum_offset)))
1025 = cpu_to_le32(crc32);
1027 start_blk = __start_cp_addr(sbi);
1029 /* need to wait for end_io results */
1030 wait_on_all_pages_writeback(sbi);
1031 if (unlikely(f2fs_cp_error(sbi)))
1034 /* write out checkpoint buffer at block 0 */
1035 update_meta_page(sbi, ckpt, start_blk++);
1037 for (i = 1; i < 1 + cp_payload_blks; i++)
1038 update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1042 write_orphan_inodes(sbi, start_blk);
1043 start_blk += orphan_blocks;
1046 write_data_summaries(sbi, start_blk);
1047 start_blk += data_sum_blocks;
1049 /* Record write statistics in the hot node summary */
1050 kbytes_written = sbi->kbytes_written;
1051 if (sb->s_bdev->bd_part)
1052 kbytes_written += BD_PART_WRITTEN(sbi);
1054 seg_i->sum_blk->info.kbytes_written = cpu_to_le64(kbytes_written);
1056 if (__remain_node_summaries(cpc->reason)) {
1057 write_node_summaries(sbi, start_blk);
1058 start_blk += NR_CURSEG_NODE_TYPE;
1061 /* writeout checkpoint block */
1062 update_meta_page(sbi, ckpt, start_blk);
1064 /* wait for previous submitted node/meta pages writeback */
1065 wait_on_all_pages_writeback(sbi);
1067 if (unlikely(f2fs_cp_error(sbi)))
1070 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
1071 filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
1073 /* update user_block_counts */
1074 sbi->last_valid_block_count = sbi->total_valid_block_count;
1075 sbi->alloc_valid_block_count = 0;
1077 /* Here, we only have one bio having CP pack */
1078 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
1080 /* wait for previous submitted meta pages writeback */
1081 wait_on_all_pages_writeback(sbi);
1084 * invalidate meta page which is used temporarily for zeroing out
1085 * block at the end of warm node chain.
1088 invalidate_mapping_pages(META_MAPPING(sbi), discard_blk,
1091 release_ino_entry(sbi);
1093 if (unlikely(f2fs_cp_error(sbi)))
1096 clear_prefree_segments(sbi, cpc);
1097 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1103 * We guarantee that this checkpoint procedure will not fail.
1105 int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1107 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1108 unsigned long long ckpt_ver;
1111 mutex_lock(&sbi->cp_mutex);
1113 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1114 (cpc->reason == CP_FASTBOOT || cpc->reason == CP_SYNC ||
1115 (cpc->reason == CP_DISCARD && !sbi->discard_blks)))
1117 if (unlikely(f2fs_cp_error(sbi))) {
1121 if (f2fs_readonly(sbi->sb)) {
1126 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1128 err = block_operations(sbi);
1132 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1134 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1135 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1136 f2fs_submit_merged_bio(sbi, META, WRITE);
1139 * update checkpoint pack index
1140 * Increase the version number so that
1141 * SIT entries and seg summaries are written at correct place
1143 ckpt_ver = cur_cp_version(ckpt);
1144 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1146 /* write cached NAT/SIT entries to NAT/SIT area */
1147 flush_nat_entries(sbi);
1148 flush_sit_entries(sbi, cpc);
1150 /* unlock all the fs_lock[] in do_checkpoint() */
1151 err = do_checkpoint(sbi, cpc);
1153 unblock_operations(sbi);
1154 stat_inc_cp_count(sbi->stat_info);
1156 if (cpc->reason == CP_RECOVERY)
1157 f2fs_msg(sbi->sb, KERN_NOTICE,
1158 "checkpoint: version = %llx", ckpt_ver);
1160 /* do checkpoint periodically */
1161 f2fs_update_time(sbi, CP_TIME);
1162 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1164 mutex_unlock(&sbi->cp_mutex);
1168 void init_ino_entry_info(struct f2fs_sb_info *sbi)
1172 for (i = 0; i < MAX_INO_ENTRY; i++) {
1173 struct inode_management *im = &sbi->im[i];
1175 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1176 spin_lock_init(&im->ino_lock);
1177 INIT_LIST_HEAD(&im->ino_list);
1181 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1182 NR_CURSEG_TYPE - __cp_payload(sbi)) *
1183 F2FS_ORPHANS_PER_BLOCK;
1186 int __init create_checkpoint_caches(void)
1188 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1189 sizeof(struct ino_entry));
1190 if (!ino_entry_slab)
1192 inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1193 sizeof(struct inode_entry));
1194 if (!inode_entry_slab) {
1195 kmem_cache_destroy(ino_entry_slab);
1201 void destroy_checkpoint_caches(void)
1203 kmem_cache_destroy(ino_entry_slab);
1204 kmem_cache_destroy(inode_entry_slab);