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);
43 SetPageUptodate(page);
48 * We guarantee no failure on the returned page.
50 struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
52 struct address_space *mapping = META_MAPPING(sbi);
54 struct f2fs_io_info fio = {
56 .rw = READ_SYNC | REQ_META | REQ_PRIO,
60 page = grab_cache_page(mapping, index);
65 if (PageUptodate(page))
68 if (f2fs_submit_page_bio(sbi, page, &fio))
72 if (unlikely(page->mapping != mapping)) {
73 f2fs_put_page(page, 1);
80 static inline bool is_valid_blkaddr(struct f2fs_sb_info *sbi,
81 block_t blkaddr, int type)
87 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
91 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
92 blkaddr < SM_I(sbi)->ssa_blkaddr))
96 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
97 blkaddr < __start_cp_addr(sbi)))
101 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
102 blkaddr < MAIN_BLKADDR(sbi)))
113 * Readahead CP/NAT/SIT/SSA pages
115 int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type)
117 block_t prev_blk_addr = 0;
119 block_t blkno = start;
120 struct f2fs_io_info fio = {
122 .rw = READ_SYNC | REQ_META | REQ_PRIO
125 for (; nrpages-- > 0; blkno++) {
127 if (!is_valid_blkaddr(sbi, blkno, type))
132 if (unlikely(blkno >=
133 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
135 /* get nat block addr */
136 fio.blk_addr = current_nat_addr(sbi,
137 blkno * NAT_ENTRY_PER_BLOCK);
140 /* get sit block addr */
141 fio.blk_addr = current_sit_addr(sbi,
142 blkno * SIT_ENTRY_PER_BLOCK);
143 if (blkno != start && prev_blk_addr + 1 != fio.blk_addr)
145 prev_blk_addr = fio.blk_addr;
150 fio.blk_addr = blkno;
156 page = grab_cache_page(META_MAPPING(sbi), fio.blk_addr);
159 if (PageUptodate(page)) {
160 f2fs_put_page(page, 1);
164 f2fs_submit_page_mbio(sbi, page, &fio);
165 f2fs_put_page(page, 0);
168 f2fs_submit_merged_bio(sbi, META, READ);
169 return blkno - start;
172 void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
175 bool readahead = false;
177 page = find_get_page(META_MAPPING(sbi), index);
178 if (!page || (page && !PageUptodate(page)))
180 f2fs_put_page(page, 0);
183 ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR);
186 static int f2fs_write_meta_page(struct page *page,
187 struct writeback_control *wbc)
189 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
191 trace_f2fs_writepage(page, META);
193 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
195 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
197 if (unlikely(f2fs_cp_error(sbi)))
200 f2fs_wait_on_page_writeback(page, META);
201 write_meta_page(sbi, page);
202 dec_page_count(sbi, F2FS_DIRTY_META);
205 if (wbc->for_reclaim)
206 f2fs_submit_merged_bio(sbi, META, WRITE);
210 redirty_page_for_writepage(wbc, page);
211 return AOP_WRITEPAGE_ACTIVATE;
214 static int f2fs_write_meta_pages(struct address_space *mapping,
215 struct writeback_control *wbc)
217 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
220 trace_f2fs_writepages(mapping->host, wbc, META);
222 /* collect a number of dirty meta pages and write together */
223 if (wbc->for_kupdate ||
224 get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
227 /* if mounting is failed, skip writing node pages */
228 mutex_lock(&sbi->cp_mutex);
229 diff = nr_pages_to_write(sbi, META, wbc);
230 written = sync_meta_pages(sbi, META, wbc->nr_to_write);
231 mutex_unlock(&sbi->cp_mutex);
232 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
236 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
240 long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
243 struct address_space *mapping = META_MAPPING(sbi);
244 pgoff_t index = 0, end = LONG_MAX;
247 struct writeback_control wbc = {
251 pagevec_init(&pvec, 0);
253 while (index <= end) {
255 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
257 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
258 if (unlikely(nr_pages == 0))
261 for (i = 0; i < nr_pages; i++) {
262 struct page *page = pvec.pages[i];
266 if (unlikely(page->mapping != mapping)) {
271 if (!PageDirty(page)) {
272 /* someone wrote it for us */
273 goto continue_unlock;
276 if (!clear_page_dirty_for_io(page))
277 goto continue_unlock;
279 if (f2fs_write_meta_page(page, &wbc)) {
284 if (unlikely(nwritten >= nr_to_write))
287 pagevec_release(&pvec);
292 f2fs_submit_merged_bio(sbi, type, WRITE);
297 static int f2fs_set_meta_page_dirty(struct page *page)
299 trace_f2fs_set_page_dirty(page, META);
301 SetPageUptodate(page);
302 if (!PageDirty(page)) {
303 __set_page_dirty_nobuffers(page);
304 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
305 SetPagePrivate(page);
306 f2fs_trace_pid(page);
312 static void f2fs_invalidate_meta_page(struct page *page, unsigned int offset,
315 struct inode *inode = page->mapping->host;
318 dec_page_count(F2FS_I_SB(inode), F2FS_DIRTY_META);
319 ClearPagePrivate(page);
322 static int f2fs_release_meta_page(struct page *page, gfp_t wait)
324 ClearPagePrivate(page);
328 const struct address_space_operations f2fs_meta_aops = {
329 .writepage = f2fs_write_meta_page,
330 .writepages = f2fs_write_meta_pages,
331 .set_page_dirty = f2fs_set_meta_page_dirty,
332 .invalidatepage = f2fs_invalidate_meta_page,
333 .releasepage = f2fs_release_meta_page,
336 static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
338 struct inode_management *im = &sbi->im[type];
341 if (radix_tree_preload(GFP_NOFS)) {
346 spin_lock(&im->ino_lock);
348 e = radix_tree_lookup(&im->ino_root, ino);
350 e = kmem_cache_alloc(ino_entry_slab, GFP_ATOMIC);
352 spin_unlock(&im->ino_lock);
353 radix_tree_preload_end();
356 if (radix_tree_insert(&im->ino_root, ino, e)) {
357 spin_unlock(&im->ino_lock);
358 kmem_cache_free(ino_entry_slab, e);
359 radix_tree_preload_end();
362 memset(e, 0, sizeof(struct ino_entry));
365 list_add_tail(&e->list, &im->ino_list);
366 if (type != ORPHAN_INO)
369 spin_unlock(&im->ino_lock);
370 radix_tree_preload_end();
373 static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
375 struct inode_management *im = &sbi->im[type];
378 spin_lock(&im->ino_lock);
379 e = radix_tree_lookup(&im->ino_root, ino);
382 radix_tree_delete(&im->ino_root, ino);
384 spin_unlock(&im->ino_lock);
385 kmem_cache_free(ino_entry_slab, e);
388 spin_unlock(&im->ino_lock);
391 void add_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
393 /* add new dirty ino entry into list */
394 __add_ino_entry(sbi, ino, type);
397 void remove_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
399 /* remove dirty ino entry from list */
400 __remove_ino_entry(sbi, ino, type);
403 /* mode should be APPEND_INO or UPDATE_INO */
404 bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
406 struct inode_management *im = &sbi->im[mode];
409 spin_lock(&im->ino_lock);
410 e = radix_tree_lookup(&im->ino_root, ino);
411 spin_unlock(&im->ino_lock);
412 return e ? true : false;
415 void release_dirty_inode(struct f2fs_sb_info *sbi)
417 struct ino_entry *e, *tmp;
420 for (i = APPEND_INO; i <= UPDATE_INO; i++) {
421 struct inode_management *im = &sbi->im[i];
423 spin_lock(&im->ino_lock);
424 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
426 radix_tree_delete(&im->ino_root, e->ino);
427 kmem_cache_free(ino_entry_slab, e);
430 spin_unlock(&im->ino_lock);
434 int acquire_orphan_inode(struct f2fs_sb_info *sbi)
436 struct inode_management *im = &sbi->im[ORPHAN_INO];
439 spin_lock(&im->ino_lock);
440 if (unlikely(im->ino_num >= sbi->max_orphans))
444 spin_unlock(&im->ino_lock);
449 void release_orphan_inode(struct f2fs_sb_info *sbi)
451 struct inode_management *im = &sbi->im[ORPHAN_INO];
453 spin_lock(&im->ino_lock);
454 f2fs_bug_on(sbi, im->ino_num == 0);
456 spin_unlock(&im->ino_lock);
459 void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
461 /* add new orphan ino entry into list */
462 __add_ino_entry(sbi, ino, ORPHAN_INO);
465 void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
467 /* remove orphan entry from orphan list */
468 __remove_ino_entry(sbi, ino, ORPHAN_INO);
471 static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
473 struct inode *inode = f2fs_iget(sbi->sb, ino);
474 f2fs_bug_on(sbi, IS_ERR(inode));
477 /* truncate all the data during iput */
481 void recover_orphan_inodes(struct f2fs_sb_info *sbi)
483 block_t start_blk, orphan_blkaddr, i, j;
485 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
488 set_sbi_flag(sbi, SBI_POR_DOING);
490 start_blk = __start_cp_addr(sbi) + 1 +
491 le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
492 orphan_blkaddr = __start_sum_addr(sbi) - 1;
494 ra_meta_pages(sbi, start_blk, orphan_blkaddr, META_CP);
496 for (i = 0; i < orphan_blkaddr; i++) {
497 struct page *page = get_meta_page(sbi, start_blk + i);
498 struct f2fs_orphan_block *orphan_blk;
500 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
501 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
502 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
503 recover_orphan_inode(sbi, ino);
505 f2fs_put_page(page, 1);
507 /* clear Orphan Flag */
508 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
509 clear_sbi_flag(sbi, SBI_POR_DOING);
513 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
515 struct list_head *head;
516 struct f2fs_orphan_block *orphan_blk = NULL;
517 unsigned int nentries = 0;
518 unsigned short index;
519 unsigned short orphan_blocks;
520 struct page *page = NULL;
521 struct ino_entry *orphan = NULL;
522 struct inode_management *im = &sbi->im[ORPHAN_INO];
524 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
526 for (index = 0; index < orphan_blocks; index++)
527 grab_meta_page(sbi, start_blk + index);
530 spin_lock(&im->ino_lock);
531 head = &im->ino_list;
533 /* loop for each orphan inode entry and write them in Jornal block */
534 list_for_each_entry(orphan, head, list) {
536 page = find_get_page(META_MAPPING(sbi), start_blk++);
537 f2fs_bug_on(sbi, !page);
539 (struct f2fs_orphan_block *)page_address(page);
540 memset(orphan_blk, 0, sizeof(*orphan_blk));
541 f2fs_put_page(page, 0);
544 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
546 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
548 * an orphan block is full of 1020 entries,
549 * then we need to flush current orphan blocks
550 * and bring another one in memory
552 orphan_blk->blk_addr = cpu_to_le16(index);
553 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
554 orphan_blk->entry_count = cpu_to_le32(nentries);
555 set_page_dirty(page);
556 f2fs_put_page(page, 1);
564 orphan_blk->blk_addr = cpu_to_le16(index);
565 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
566 orphan_blk->entry_count = cpu_to_le32(nentries);
567 set_page_dirty(page);
568 f2fs_put_page(page, 1);
571 spin_unlock(&im->ino_lock);
574 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
575 block_t cp_addr, unsigned long long *version)
577 struct page *cp_page_1, *cp_page_2 = NULL;
578 unsigned long blk_size = sbi->blocksize;
579 struct f2fs_checkpoint *cp_block;
580 unsigned long long cur_version = 0, pre_version = 0;
584 /* Read the 1st cp block in this CP pack */
585 cp_page_1 = get_meta_page(sbi, cp_addr);
587 /* get the version number */
588 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
589 crc_offset = le32_to_cpu(cp_block->checksum_offset);
590 if (crc_offset >= blk_size)
593 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
594 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
597 pre_version = cur_cp_version(cp_block);
599 /* Read the 2nd cp block in this CP pack */
600 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
601 cp_page_2 = get_meta_page(sbi, cp_addr);
603 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
604 crc_offset = le32_to_cpu(cp_block->checksum_offset);
605 if (crc_offset >= blk_size)
608 crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset)));
609 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
612 cur_version = cur_cp_version(cp_block);
614 if (cur_version == pre_version) {
615 *version = cur_version;
616 f2fs_put_page(cp_page_2, 1);
620 f2fs_put_page(cp_page_2, 1);
622 f2fs_put_page(cp_page_1, 1);
626 int get_valid_checkpoint(struct f2fs_sb_info *sbi)
628 struct f2fs_checkpoint *cp_block;
629 struct f2fs_super_block *fsb = sbi->raw_super;
630 struct page *cp1, *cp2, *cur_page;
631 unsigned long blk_size = sbi->blocksize;
632 unsigned long long cp1_version = 0, cp2_version = 0;
633 unsigned long long cp_start_blk_no;
634 unsigned int cp_blks = 1 + le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
638 sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
642 * Finding out valid cp block involves read both
643 * sets( cp pack1 and cp pack 2)
645 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
646 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
648 /* The second checkpoint pack should start at the next segment */
649 cp_start_blk_no += ((unsigned long long)1) <<
650 le32_to_cpu(fsb->log_blocks_per_seg);
651 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
654 if (ver_after(cp2_version, cp1_version))
666 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
667 memcpy(sbi->ckpt, cp_block, blk_size);
672 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
674 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
676 for (i = 1; i < cp_blks; i++) {
677 void *sit_bitmap_ptr;
678 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
680 cur_page = get_meta_page(sbi, cp_blk_no + i);
681 sit_bitmap_ptr = page_address(cur_page);
682 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
683 f2fs_put_page(cur_page, 1);
686 f2fs_put_page(cp1, 1);
687 f2fs_put_page(cp2, 1);
695 static int __add_dirty_inode(struct inode *inode, struct inode_entry *new)
697 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
699 if (is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR))
702 set_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
703 F2FS_I(inode)->dirty_dir = new;
704 list_add_tail(&new->list, &sbi->dir_inode_list);
705 stat_inc_dirty_dir(sbi);
709 void update_dirty_page(struct inode *inode, struct page *page)
711 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
712 struct inode_entry *new;
715 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode))
718 if (!S_ISDIR(inode->i_mode)) {
719 inode_inc_dirty_pages(inode);
723 new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
725 INIT_LIST_HEAD(&new->list);
727 spin_lock(&sbi->dir_inode_lock);
728 ret = __add_dirty_inode(inode, new);
729 inode_inc_dirty_pages(inode);
730 spin_unlock(&sbi->dir_inode_lock);
733 kmem_cache_free(inode_entry_slab, new);
735 SetPagePrivate(page);
736 f2fs_trace_pid(page);
739 void add_dirty_dir_inode(struct inode *inode)
741 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
742 struct inode_entry *new =
743 f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
747 INIT_LIST_HEAD(&new->list);
749 spin_lock(&sbi->dir_inode_lock);
750 ret = __add_dirty_inode(inode, new);
751 spin_unlock(&sbi->dir_inode_lock);
754 kmem_cache_free(inode_entry_slab, new);
757 void remove_dirty_dir_inode(struct inode *inode)
759 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
760 struct inode_entry *entry;
762 if (!S_ISDIR(inode->i_mode))
765 spin_lock(&sbi->dir_inode_lock);
766 if (get_dirty_pages(inode) ||
767 !is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR)) {
768 spin_unlock(&sbi->dir_inode_lock);
772 entry = F2FS_I(inode)->dirty_dir;
773 list_del(&entry->list);
774 F2FS_I(inode)->dirty_dir = NULL;
775 clear_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
776 stat_dec_dirty_dir(sbi);
777 spin_unlock(&sbi->dir_inode_lock);
778 kmem_cache_free(inode_entry_slab, entry);
780 /* Only from the recovery routine */
781 if (is_inode_flag_set(F2FS_I(inode), FI_DELAY_IPUT)) {
782 clear_inode_flag(F2FS_I(inode), FI_DELAY_IPUT);
787 void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
789 struct list_head *head;
790 struct inode_entry *entry;
793 if (unlikely(f2fs_cp_error(sbi)))
796 spin_lock(&sbi->dir_inode_lock);
798 head = &sbi->dir_inode_list;
799 if (list_empty(head)) {
800 spin_unlock(&sbi->dir_inode_lock);
803 entry = list_entry(head->next, struct inode_entry, list);
804 inode = igrab(entry->inode);
805 spin_unlock(&sbi->dir_inode_lock);
807 filemap_fdatawrite(inode->i_mapping);
811 * We should submit bio, since it exists several
812 * wribacking dentry pages in the freeing inode.
814 f2fs_submit_merged_bio(sbi, DATA, WRITE);
820 * Freeze all the FS-operations for checkpoint.
822 static int block_operations(struct f2fs_sb_info *sbi)
824 struct writeback_control wbc = {
825 .sync_mode = WB_SYNC_ALL,
826 .nr_to_write = LONG_MAX,
829 struct blk_plug plug;
832 blk_start_plug(&plug);
836 /* write all the dirty dentry pages */
837 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
838 f2fs_unlock_all(sbi);
839 sync_dirty_dir_inodes(sbi);
840 if (unlikely(f2fs_cp_error(sbi))) {
844 goto retry_flush_dents;
848 * POR: we should ensure that there are no dirty node pages
849 * until finishing nat/sit flush.
852 down_write(&sbi->node_write);
854 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
855 up_write(&sbi->node_write);
856 sync_node_pages(sbi, 0, &wbc);
857 if (unlikely(f2fs_cp_error(sbi))) {
858 f2fs_unlock_all(sbi);
862 goto retry_flush_nodes;
865 blk_finish_plug(&plug);
869 static void unblock_operations(struct f2fs_sb_info *sbi)
871 up_write(&sbi->node_write);
872 f2fs_unlock_all(sbi);
875 static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
880 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
882 if (!get_pages(sbi, F2FS_WRITEBACK))
887 finish_wait(&sbi->cp_wait, &wait);
890 static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
892 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
893 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
894 struct f2fs_nm_info *nm_i = NM_I(sbi);
895 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
896 nid_t last_nid = nm_i->next_scan_nid;
898 struct page *cp_page;
899 unsigned int data_sum_blocks, orphan_blocks;
903 int cp_payload_blks = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
906 * This avoids to conduct wrong roll-forward operations and uses
907 * metapages, so should be called prior to sync_meta_pages below.
909 discard_next_dnode(sbi, NEXT_FREE_BLKADDR(sbi, curseg));
911 /* Flush all the NAT/SIT pages */
912 while (get_pages(sbi, F2FS_DIRTY_META)) {
913 sync_meta_pages(sbi, META, LONG_MAX);
914 if (unlikely(f2fs_cp_error(sbi)))
918 next_free_nid(sbi, &last_nid);
922 * version number is already updated
924 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
925 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
926 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
927 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
928 ckpt->cur_node_segno[i] =
929 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
930 ckpt->cur_node_blkoff[i] =
931 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
932 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
933 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
935 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
936 ckpt->cur_data_segno[i] =
937 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
938 ckpt->cur_data_blkoff[i] =
939 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
940 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
941 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
944 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
945 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
946 ckpt->next_free_nid = cpu_to_le32(last_nid);
948 /* 2 cp + n data seg summary + orphan inode blocks */
949 data_sum_blocks = npages_for_summary_flush(sbi, false);
950 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
951 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
953 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
955 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
956 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
959 if (cpc->reason == CP_UMOUNT) {
960 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
961 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
962 cp_payload_blks + data_sum_blocks +
963 orphan_blocks + NR_CURSEG_NODE_TYPE);
965 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
966 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
967 cp_payload_blks + data_sum_blocks +
972 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
974 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
976 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
977 set_ckpt_flags(ckpt, CP_FSCK_FLAG);
979 /* update SIT/NAT bitmap */
980 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
981 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
983 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
984 *((__le32 *)((unsigned char *)ckpt +
985 le32_to_cpu(ckpt->checksum_offset)))
986 = cpu_to_le32(crc32);
988 start_blk = __start_cp_addr(sbi);
990 /* write out checkpoint buffer at block 0 */
991 cp_page = grab_meta_page(sbi, start_blk++);
992 kaddr = page_address(cp_page);
993 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
994 set_page_dirty(cp_page);
995 f2fs_put_page(cp_page, 1);
997 for (i = 1; i < 1 + cp_payload_blks; i++) {
998 cp_page = grab_meta_page(sbi, start_blk++);
999 kaddr = page_address(cp_page);
1000 memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE,
1001 (1 << sbi->log_blocksize));
1002 set_page_dirty(cp_page);
1003 f2fs_put_page(cp_page, 1);
1007 write_orphan_inodes(sbi, start_blk);
1008 start_blk += orphan_blocks;
1011 write_data_summaries(sbi, start_blk);
1012 start_blk += data_sum_blocks;
1013 if (cpc->reason == CP_UMOUNT) {
1014 write_node_summaries(sbi, start_blk);
1015 start_blk += NR_CURSEG_NODE_TYPE;
1018 /* writeout checkpoint block */
1019 cp_page = grab_meta_page(sbi, start_blk);
1020 kaddr = page_address(cp_page);
1021 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
1022 set_page_dirty(cp_page);
1023 f2fs_put_page(cp_page, 1);
1025 /* wait for previous submitted node/meta pages writeback */
1026 wait_on_all_pages_writeback(sbi);
1028 if (unlikely(f2fs_cp_error(sbi)))
1031 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
1032 filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
1034 /* update user_block_counts */
1035 sbi->last_valid_block_count = sbi->total_valid_block_count;
1036 sbi->alloc_valid_block_count = 0;
1038 /* Here, we only have one bio having CP pack */
1039 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
1041 /* wait for previous submitted meta pages writeback */
1042 wait_on_all_pages_writeback(sbi);
1044 release_dirty_inode(sbi);
1046 if (unlikely(f2fs_cp_error(sbi)))
1049 clear_prefree_segments(sbi);
1050 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1054 * We guarantee that this checkpoint procedure will not fail.
1056 void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1058 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1059 unsigned long long ckpt_ver;
1061 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1063 mutex_lock(&sbi->cp_mutex);
1065 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1066 cpc->reason != CP_DISCARD && cpc->reason != CP_UMOUNT)
1068 if (unlikely(f2fs_cp_error(sbi)))
1070 if (f2fs_readonly(sbi->sb))
1072 if (block_operations(sbi))
1075 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1077 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1078 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1079 f2fs_submit_merged_bio(sbi, META, WRITE);
1082 * update checkpoint pack index
1083 * Increase the version number so that
1084 * SIT entries and seg summaries are written at correct place
1086 ckpt_ver = cur_cp_version(ckpt);
1087 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1089 /* write cached NAT/SIT entries to NAT/SIT area */
1090 flush_nat_entries(sbi);
1091 flush_sit_entries(sbi, cpc);
1093 /* unlock all the fs_lock[] in do_checkpoint() */
1094 do_checkpoint(sbi, cpc);
1096 unblock_operations(sbi);
1097 stat_inc_cp_count(sbi->stat_info);
1099 mutex_unlock(&sbi->cp_mutex);
1100 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1103 void init_ino_entry_info(struct f2fs_sb_info *sbi)
1107 for (i = 0; i < MAX_INO_ENTRY; i++) {
1108 struct inode_management *im = &sbi->im[i];
1110 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1111 spin_lock_init(&im->ino_lock);
1112 INIT_LIST_HEAD(&im->ino_list);
1117 * considering 512 blocks in a segment 8 blocks are needed for cp
1118 * and log segment summaries. Remaining blocks are used to keep
1119 * orphan entries with the limitation one reserved segment
1120 * for cp pack we can have max 1020*504 orphan entries
1122 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1123 NR_CURSEG_TYPE) * F2FS_ORPHANS_PER_BLOCK;
1126 int __init create_checkpoint_caches(void)
1128 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1129 sizeof(struct ino_entry));
1130 if (!ino_entry_slab)
1132 inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1133 sizeof(struct inode_entry));
1134 if (!inode_entry_slab) {
1135 kmem_cache_destroy(ino_entry_slab);
1141 void destroy_checkpoint_caches(void)
1143 kmem_cache_destroy(ino_entry_slab);
1144 kmem_cache_destroy(inode_entry_slab);