diff options
Diffstat (limited to 'fs/f2fs/checkpoint.c')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 1576 |
1 files changed, 1576 insertions, 0 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c new file mode 100644 index 000000000..a563de5cc --- /dev/null +++ b/fs/f2fs/checkpoint.c @@ -0,0 +1,1576 @@ +/* + * fs/f2fs/checkpoint.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/fs.h> +#include <linux/bio.h> +#include <linux/mpage.h> +#include <linux/writeback.h> +#include <linux/blkdev.h> +#include <linux/f2fs_fs.h> +#include <linux/pagevec.h> +#include <linux/swap.h> + +#include "f2fs.h" +#include "node.h" +#include "segment.h" +#include "trace.h" +#include <trace/events/f2fs.h> + +static struct kmem_cache *ino_entry_slab; +struct kmem_cache *f2fs_inode_entry_slab; + +void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io) +{ + f2fs_build_fault_attr(sbi, 0, 0); + set_ckpt_flags(sbi, CP_ERROR_FLAG); + if (!end_io) + f2fs_flush_merged_writes(sbi); +} + +/* + * We guarantee no failure on the returned page. + */ +struct page *f2fs_grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index) +{ + struct address_space *mapping = META_MAPPING(sbi); + struct page *page = NULL; +repeat: + page = f2fs_grab_cache_page(mapping, index, false); + if (!page) { + cond_resched(); + goto repeat; + } + f2fs_wait_on_page_writeback(page, META, true); + if (!PageUptodate(page)) + SetPageUptodate(page); + return page; +} + +/* + * We guarantee no failure on the returned page. + */ +static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index, + bool is_meta) +{ + struct address_space *mapping = META_MAPPING(sbi); + struct page *page; + struct f2fs_io_info fio = { + .sbi = sbi, + .type = META, + .op = REQ_OP_READ, + .op_flags = REQ_META | REQ_PRIO, + .old_blkaddr = index, + .new_blkaddr = index, + .encrypted_page = NULL, + .is_meta = is_meta, + }; + int err; + + if (unlikely(!is_meta)) + fio.op_flags &= ~REQ_META; +repeat: + page = f2fs_grab_cache_page(mapping, index, false); + if (!page) { + cond_resched(); + goto repeat; + } + if (PageUptodate(page)) + goto out; + + fio.page = page; + + err = f2fs_submit_page_bio(&fio); + if (err) { + f2fs_put_page(page, 1); + return ERR_PTR(err); + } + + lock_page(page); + if (unlikely(page->mapping != mapping)) { + f2fs_put_page(page, 1); + goto repeat; + } + + if (unlikely(!PageUptodate(page))) { + f2fs_put_page(page, 1); + return ERR_PTR(-EIO); + } +out: + return page; +} + +struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index) +{ + return __get_meta_page(sbi, index, true); +} + +struct page *f2fs_get_meta_page_nofail(struct f2fs_sb_info *sbi, pgoff_t index) +{ + struct page *page; + int count = 0; + +retry: + page = __get_meta_page(sbi, index, true); + if (IS_ERR(page)) { + if (PTR_ERR(page) == -EIO && + ++count <= DEFAULT_RETRY_IO_COUNT) + goto retry; + + f2fs_stop_checkpoint(sbi, false); + f2fs_bug_on(sbi, 1); + } + + return page; +} + +/* for POR only */ +struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index) +{ + return __get_meta_page(sbi, index, false); +} + +bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi, + block_t blkaddr, int type) +{ + switch (type) { + case META_NAT: + break; + case META_SIT: + if (unlikely(blkaddr >= SIT_BLK_CNT(sbi))) + return false; + break; + case META_SSA: + if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) || + blkaddr < SM_I(sbi)->ssa_blkaddr)) + return false; + break; + case META_CP: + if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr || + blkaddr < __start_cp_addr(sbi))) + return false; + break; + case META_POR: + case DATA_GENERIC: + if (unlikely(blkaddr >= MAX_BLKADDR(sbi) || + blkaddr < MAIN_BLKADDR(sbi))) { + if (type == DATA_GENERIC) { + f2fs_msg(sbi->sb, KERN_WARNING, + "access invalid blkaddr:%u", blkaddr); + WARN_ON(1); + } + return false; + } + break; + case META_GENERIC: + if (unlikely(blkaddr < SEG0_BLKADDR(sbi) || + blkaddr >= MAIN_BLKADDR(sbi))) + return false; + break; + default: + BUG(); + } + + return true; +} + +/* + * Readahead CP/NAT/SIT/SSA pages + */ +int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, + int type, bool sync) +{ + struct page *page; + block_t blkno = start; + struct f2fs_io_info fio = { + .sbi = sbi, + .type = META, + .op = REQ_OP_READ, + .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD, + .encrypted_page = NULL, + .in_list = false, + .is_meta = (type != META_POR), + }; + struct blk_plug plug; + + if (unlikely(type == META_POR)) + fio.op_flags &= ~REQ_META; + + blk_start_plug(&plug); + for (; nrpages-- > 0; blkno++) { + + if (!f2fs_is_valid_blkaddr(sbi, blkno, type)) + goto out; + + switch (type) { + case META_NAT: + if (unlikely(blkno >= + NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid))) + blkno = 0; + /* get nat block addr */ + fio.new_blkaddr = current_nat_addr(sbi, + blkno * NAT_ENTRY_PER_BLOCK); + break; + case META_SIT: + if (unlikely(blkno >= TOTAL_SEGS(sbi))) + goto out; + /* get sit block addr */ + fio.new_blkaddr = current_sit_addr(sbi, + blkno * SIT_ENTRY_PER_BLOCK); + break; + case META_SSA: + case META_CP: + case META_POR: + fio.new_blkaddr = blkno; + break; + default: + BUG(); + } + + page = f2fs_grab_cache_page(META_MAPPING(sbi), + fio.new_blkaddr, false); + if (!page) + continue; + if (PageUptodate(page)) { + f2fs_put_page(page, 1); + continue; + } + + fio.page = page; + f2fs_submit_page_bio(&fio); + f2fs_put_page(page, 0); + } +out: + blk_finish_plug(&plug); + return blkno - start; +} + +void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index) +{ + struct page *page; + bool readahead = false; + + page = find_get_page(META_MAPPING(sbi), index); + if (!page || !PageUptodate(page)) + readahead = true; + f2fs_put_page(page, 0); + + if (readahead) + f2fs_ra_meta_pages(sbi, index, BIO_MAX_PAGES, META_POR, true); +} + +static int __f2fs_write_meta_page(struct page *page, + struct writeback_control *wbc, + enum iostat_type io_type) +{ + struct f2fs_sb_info *sbi = F2FS_P_SB(page); + + trace_f2fs_writepage(page, META); + + if (unlikely(f2fs_cp_error(sbi))) + goto redirty_out; + if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) + goto redirty_out; + if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0)) + goto redirty_out; + + f2fs_do_write_meta_page(sbi, page, io_type); + dec_page_count(sbi, F2FS_DIRTY_META); + + if (wbc->for_reclaim) + f2fs_submit_merged_write_cond(sbi, page->mapping->host, + 0, page->index, META); + + unlock_page(page); + + if (unlikely(f2fs_cp_error(sbi))) + f2fs_submit_merged_write(sbi, META); + + return 0; + +redirty_out: + redirty_page_for_writepage(wbc, page); + return AOP_WRITEPAGE_ACTIVATE; +} + +static int f2fs_write_meta_page(struct page *page, + struct writeback_control *wbc) +{ + return __f2fs_write_meta_page(page, wbc, FS_META_IO); +} + +static int f2fs_write_meta_pages(struct address_space *mapping, + struct writeback_control *wbc) +{ + struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); + long diff, written; + + if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) + goto skip_write; + + /* collect a number of dirty meta pages and write together */ + if (wbc->for_kupdate || + get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META)) + goto skip_write; + + /* if locked failed, cp will flush dirty pages instead */ + if (!mutex_trylock(&sbi->cp_mutex)) + goto skip_write; + + trace_f2fs_writepages(mapping->host, wbc, META); + diff = nr_pages_to_write(sbi, META, wbc); + written = f2fs_sync_meta_pages(sbi, META, wbc->nr_to_write, FS_META_IO); + mutex_unlock(&sbi->cp_mutex); + wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff); + return 0; + +skip_write: + wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META); + trace_f2fs_writepages(mapping->host, wbc, META); + return 0; +} + +long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type, + long nr_to_write, enum iostat_type io_type) +{ + struct address_space *mapping = META_MAPPING(sbi); + pgoff_t index = 0, prev = ULONG_MAX; + struct pagevec pvec; + long nwritten = 0; + int nr_pages; + struct writeback_control wbc = { + .for_reclaim = 0, + }; + struct blk_plug plug; + + pagevec_init(&pvec); + + blk_start_plug(&plug); + + while ((nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, + PAGECACHE_TAG_DIRTY))) { + int i; + + for (i = 0; i < nr_pages; i++) { + struct page *page = pvec.pages[i]; + + if (prev == ULONG_MAX) + prev = page->index - 1; + if (nr_to_write != LONG_MAX && page->index != prev + 1) { + pagevec_release(&pvec); + goto stop; + } + + lock_page(page); + + if (unlikely(page->mapping != mapping)) { +continue_unlock: + unlock_page(page); + continue; + } + if (!PageDirty(page)) { + /* someone wrote it for us */ + goto continue_unlock; + } + + f2fs_wait_on_page_writeback(page, META, true); + + BUG_ON(PageWriteback(page)); + if (!clear_page_dirty_for_io(page)) + goto continue_unlock; + + if (__f2fs_write_meta_page(page, &wbc, io_type)) { + unlock_page(page); + break; + } + nwritten++; + prev = page->index; + if (unlikely(nwritten >= nr_to_write)) + break; + } + pagevec_release(&pvec); + cond_resched(); + } +stop: + if (nwritten) + f2fs_submit_merged_write(sbi, type); + + blk_finish_plug(&plug); + + return nwritten; +} + +static int f2fs_set_meta_page_dirty(struct page *page) +{ + trace_f2fs_set_page_dirty(page, META); + + if (!PageUptodate(page)) + SetPageUptodate(page); + if (!PageDirty(page)) { + __set_page_dirty_nobuffers(page); + inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META); + SetPagePrivate(page); + f2fs_trace_pid(page); + return 1; + } + return 0; +} + +const struct address_space_operations f2fs_meta_aops = { + .writepage = f2fs_write_meta_page, + .writepages = f2fs_write_meta_pages, + .set_page_dirty = f2fs_set_meta_page_dirty, + .invalidatepage = f2fs_invalidate_page, + .releasepage = f2fs_release_page, +#ifdef CONFIG_MIGRATION + .migratepage = f2fs_migrate_page, +#endif +}; + +static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, + unsigned int devidx, int type) +{ + struct inode_management *im = &sbi->im[type]; + struct ino_entry *e, *tmp; + + tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS); + + radix_tree_preload(GFP_NOFS | __GFP_NOFAIL); + + spin_lock(&im->ino_lock); + e = radix_tree_lookup(&im->ino_root, ino); + if (!e) { + e = tmp; + if (unlikely(radix_tree_insert(&im->ino_root, ino, e))) + f2fs_bug_on(sbi, 1); + + memset(e, 0, sizeof(struct ino_entry)); + e->ino = ino; + + list_add_tail(&e->list, &im->ino_list); + if (type != ORPHAN_INO) + im->ino_num++; + } + + if (type == FLUSH_INO) + f2fs_set_bit(devidx, (char *)&e->dirty_device); + + spin_unlock(&im->ino_lock); + radix_tree_preload_end(); + + if (e != tmp) + kmem_cache_free(ino_entry_slab, tmp); +} + +static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type) +{ + struct inode_management *im = &sbi->im[type]; + struct ino_entry *e; + + spin_lock(&im->ino_lock); + e = radix_tree_lookup(&im->ino_root, ino); + if (e) { + list_del(&e->list); + radix_tree_delete(&im->ino_root, ino); + im->ino_num--; + spin_unlock(&im->ino_lock); + kmem_cache_free(ino_entry_slab, e); + return; + } + spin_unlock(&im->ino_lock); +} + +void f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type) +{ + /* add new dirty ino entry into list */ + __add_ino_entry(sbi, ino, 0, type); +} + +void f2fs_remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type) +{ + /* remove dirty ino entry from list */ + __remove_ino_entry(sbi, ino, type); +} + +/* mode should be APPEND_INO or UPDATE_INO */ +bool f2fs_exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode) +{ + struct inode_management *im = &sbi->im[mode]; + struct ino_entry *e; + + spin_lock(&im->ino_lock); + e = radix_tree_lookup(&im->ino_root, ino); + spin_unlock(&im->ino_lock); + return e ? true : false; +} + +void f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all) +{ + struct ino_entry *e, *tmp; + int i; + + for (i = all ? ORPHAN_INO : APPEND_INO; i < MAX_INO_ENTRY; i++) { + struct inode_management *im = &sbi->im[i]; + + spin_lock(&im->ino_lock); + list_for_each_entry_safe(e, tmp, &im->ino_list, list) { + list_del(&e->list); + radix_tree_delete(&im->ino_root, e->ino); + kmem_cache_free(ino_entry_slab, e); + im->ino_num--; + } + spin_unlock(&im->ino_lock); + } +} + +void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino, + unsigned int devidx, int type) +{ + __add_ino_entry(sbi, ino, devidx, type); +} + +bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino, + unsigned int devidx, int type) +{ + struct inode_management *im = &sbi->im[type]; + struct ino_entry *e; + bool is_dirty = false; + + spin_lock(&im->ino_lock); + e = radix_tree_lookup(&im->ino_root, ino); + if (e && f2fs_test_bit(devidx, (char *)&e->dirty_device)) + is_dirty = true; + spin_unlock(&im->ino_lock); + return is_dirty; +} + +int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi) +{ + struct inode_management *im = &sbi->im[ORPHAN_INO]; + int err = 0; + + spin_lock(&im->ino_lock); + + if (time_to_inject(sbi, FAULT_ORPHAN)) { + spin_unlock(&im->ino_lock); + f2fs_show_injection_info(FAULT_ORPHAN); + return -ENOSPC; + } + + if (unlikely(im->ino_num >= sbi->max_orphans)) + err = -ENOSPC; + else + im->ino_num++; + spin_unlock(&im->ino_lock); + + return err; +} + +void f2fs_release_orphan_inode(struct f2fs_sb_info *sbi) +{ + struct inode_management *im = &sbi->im[ORPHAN_INO]; + + spin_lock(&im->ino_lock); + f2fs_bug_on(sbi, im->ino_num == 0); + im->ino_num--; + spin_unlock(&im->ino_lock); +} + +void f2fs_add_orphan_inode(struct inode *inode) +{ + /* add new orphan ino entry into list */ + __add_ino_entry(F2FS_I_SB(inode), inode->i_ino, 0, ORPHAN_INO); + f2fs_update_inode_page(inode); +} + +void f2fs_remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) +{ + /* remove orphan entry from orphan list */ + __remove_ino_entry(sbi, ino, ORPHAN_INO); +} + +static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) +{ + struct inode *inode; + struct node_info ni; + int err; + + inode = f2fs_iget_retry(sbi->sb, ino); + if (IS_ERR(inode)) { + /* + * there should be a bug that we can't find the entry + * to orphan inode. + */ + f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT); + return PTR_ERR(inode); + } + + err = dquot_initialize(inode); + if (err) { + iput(inode); + goto err_out; + } + + clear_nlink(inode); + + /* truncate all the data during iput */ + iput(inode); + + err = f2fs_get_node_info(sbi, ino, &ni); + if (err) + goto err_out; + + /* ENOMEM was fully retried in f2fs_evict_inode. */ + if (ni.blk_addr != NULL_ADDR) { + err = -EIO; + goto err_out; + } + return 0; + +err_out: + set_sbi_flag(sbi, SBI_NEED_FSCK); + f2fs_msg(sbi->sb, KERN_WARNING, + "%s: orphan failed (ino=%x), run fsck to fix.", + __func__, ino); + return err; +} + +int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi) +{ + block_t start_blk, orphan_blocks, i, j; + unsigned int s_flags = sbi->sb->s_flags; + int err = 0; +#ifdef CONFIG_QUOTA + int quota_enabled; +#endif + + if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG)) + return 0; + + if (s_flags & SB_RDONLY) { + f2fs_msg(sbi->sb, KERN_INFO, "orphan cleanup on readonly fs"); + sbi->sb->s_flags &= ~SB_RDONLY; + } + +#ifdef CONFIG_QUOTA + /* Needed for iput() to work correctly and not trash data */ + sbi->sb->s_flags |= SB_ACTIVE; + + /* + * Turn on quotas which were not enabled for read-only mounts if + * filesystem has quota feature, so that they are updated correctly. + */ + quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY); +#endif + + start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi); + orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi); + + f2fs_ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true); + + for (i = 0; i < orphan_blocks; i++) { + struct page *page; + struct f2fs_orphan_block *orphan_blk; + + page = f2fs_get_meta_page(sbi, start_blk + i); + if (IS_ERR(page)) { + err = PTR_ERR(page); + goto out; + } + + orphan_blk = (struct f2fs_orphan_block *)page_address(page); + for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) { + nid_t ino = le32_to_cpu(orphan_blk->ino[j]); + err = recover_orphan_inode(sbi, ino); + if (err) { + f2fs_put_page(page, 1); + goto out; + } + } + f2fs_put_page(page, 1); + } + /* clear Orphan Flag */ + clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG); +out: + set_sbi_flag(sbi, SBI_IS_RECOVERED); + +#ifdef CONFIG_QUOTA + /* Turn quotas off */ + if (quota_enabled) + f2fs_quota_off_umount(sbi->sb); +#endif + sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */ + + return err; +} + +static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk) +{ + struct list_head *head; + struct f2fs_orphan_block *orphan_blk = NULL; + unsigned int nentries = 0; + unsigned short index = 1; + unsigned short orphan_blocks; + struct page *page = NULL; + struct ino_entry *orphan = NULL; + struct inode_management *im = &sbi->im[ORPHAN_INO]; + + orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num); + + /* + * we don't need to do spin_lock(&im->ino_lock) here, since all the + * orphan inode operations are covered under f2fs_lock_op(). + * And, spin_lock should be avoided due to page operations below. + */ + head = &im->ino_list; + + /* loop for each orphan inode entry and write them in Jornal block */ + list_for_each_entry(orphan, head, list) { + if (!page) { + page = f2fs_grab_meta_page(sbi, start_blk++); + orphan_blk = + (struct f2fs_orphan_block *)page_address(page); + memset(orphan_blk, 0, sizeof(*orphan_blk)); + } + + orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino); + + if (nentries == F2FS_ORPHANS_PER_BLOCK) { + /* + * an orphan block is full of 1020 entries, + * then we need to flush current orphan blocks + * and bring another one in memory + */ + orphan_blk->blk_addr = cpu_to_le16(index); + orphan_blk->blk_count = cpu_to_le16(orphan_blocks); + orphan_blk->entry_count = cpu_to_le32(nentries); + set_page_dirty(page); + f2fs_put_page(page, 1); + index++; + nentries = 0; + page = NULL; + } + } + + if (page) { + orphan_blk->blk_addr = cpu_to_le16(index); + orphan_blk->blk_count = cpu_to_le16(orphan_blocks); + orphan_blk->entry_count = cpu_to_le32(nentries); + set_page_dirty(page); + f2fs_put_page(page, 1); + } +} + +static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr, + struct f2fs_checkpoint **cp_block, struct page **cp_page, + unsigned long long *version) +{ + unsigned long blk_size = sbi->blocksize; + size_t crc_offset = 0; + __u32 crc = 0; + + *cp_page = f2fs_get_meta_page(sbi, cp_addr); + if (IS_ERR(*cp_page)) + return PTR_ERR(*cp_page); + + *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page); + + crc_offset = le32_to_cpu((*cp_block)->checksum_offset); + if (crc_offset > (blk_size - sizeof(__le32))) { + f2fs_put_page(*cp_page, 1); + f2fs_msg(sbi->sb, KERN_WARNING, + "invalid crc_offset: %zu", crc_offset); + return -EINVAL; + } + + crc = cur_cp_crc(*cp_block); + if (!f2fs_crc_valid(sbi, crc, *cp_block, crc_offset)) { + f2fs_put_page(*cp_page, 1); + f2fs_msg(sbi->sb, KERN_WARNING, "invalid crc value"); + return -EINVAL; + } + + *version = cur_cp_version(*cp_block); + return 0; +} + +static struct page *validate_checkpoint(struct f2fs_sb_info *sbi, + block_t cp_addr, unsigned long long *version) +{ + struct page *cp_page_1 = NULL, *cp_page_2 = NULL; + struct f2fs_checkpoint *cp_block = NULL; + unsigned long long cur_version = 0, pre_version = 0; + int err; + + err = get_checkpoint_version(sbi, cp_addr, &cp_block, + &cp_page_1, version); + if (err) + return NULL; + + if (le32_to_cpu(cp_block->cp_pack_total_block_count) > + sbi->blocks_per_seg) { + f2fs_msg(sbi->sb, KERN_WARNING, + "invalid cp_pack_total_block_count:%u", + le32_to_cpu(cp_block->cp_pack_total_block_count)); + goto invalid_cp; + } + pre_version = *version; + + cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1; + err = get_checkpoint_version(sbi, cp_addr, &cp_block, + &cp_page_2, version); + if (err) + goto invalid_cp; + cur_version = *version; + + if (cur_version == pre_version) { + *version = cur_version; + f2fs_put_page(cp_page_2, 1); + return cp_page_1; + } + f2fs_put_page(cp_page_2, 1); +invalid_cp: + f2fs_put_page(cp_page_1, 1); + return NULL; +} + +int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi) +{ + struct f2fs_checkpoint *cp_block; + struct f2fs_super_block *fsb = sbi->raw_super; + struct page *cp1, *cp2, *cur_page; + unsigned long blk_size = sbi->blocksize; + unsigned long long cp1_version = 0, cp2_version = 0; + unsigned long long cp_start_blk_no; + unsigned int cp_blks = 1 + __cp_payload(sbi); + block_t cp_blk_no; + int i; + int err; + + sbi->ckpt = f2fs_kzalloc(sbi, array_size(blk_size, cp_blks), + GFP_KERNEL); + if (!sbi->ckpt) + return -ENOMEM; + /* + * Finding out valid cp block involves read both + * sets( cp pack1 and cp pack 2) + */ + cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr); + cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version); + + /* The second checkpoint pack should start at the next segment */ + cp_start_blk_no += ((unsigned long long)1) << + le32_to_cpu(fsb->log_blocks_per_seg); + cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version); + + if (cp1 && cp2) { + if (ver_after(cp2_version, cp1_version)) + cur_page = cp2; + else + cur_page = cp1; + } else if (cp1) { + cur_page = cp1; + } else if (cp2) { + cur_page = cp2; + } else { + err = -EFSCORRUPTED; + goto fail_no_cp; + } + + cp_block = (struct f2fs_checkpoint *)page_address(cur_page); + memcpy(sbi->ckpt, cp_block, blk_size); + + if (cur_page == cp1) + sbi->cur_cp_pack = 1; + else + sbi->cur_cp_pack = 2; + + /* Sanity checking of checkpoint */ + if (f2fs_sanity_check_ckpt(sbi)) { + err = -EFSCORRUPTED; + goto free_fail_no_cp; + } + + if (cp_blks <= 1) + goto done; + + cp_blk_no = le32_to_cpu(fsb->cp_blkaddr); + if (cur_page == cp2) + cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg); + + for (i = 1; i < cp_blks; i++) { + void *sit_bitmap_ptr; + unsigned char *ckpt = (unsigned char *)sbi->ckpt; + + cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i); + if (IS_ERR(cur_page)) { + err = PTR_ERR(cur_page); + goto free_fail_no_cp; + } + sit_bitmap_ptr = page_address(cur_page); + memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size); + f2fs_put_page(cur_page, 1); + } +done: + f2fs_put_page(cp1, 1); + f2fs_put_page(cp2, 1); + return 0; + +free_fail_no_cp: + f2fs_put_page(cp1, 1); + f2fs_put_page(cp2, 1); +fail_no_cp: + kfree(sbi->ckpt); + return err; +} + +static void __add_dirty_inode(struct inode *inode, enum inode_type type) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE; + + if (is_inode_flag_set(inode, flag)) + return; + + set_inode_flag(inode, flag); + if (!f2fs_is_volatile_file(inode)) + list_add_tail(&F2FS_I(inode)->dirty_list, + &sbi->inode_list[type]); + stat_inc_dirty_inode(sbi, type); +} + +static void __remove_dirty_inode(struct inode *inode, enum inode_type type) +{ + int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE; + + if (get_dirty_pages(inode) || !is_inode_flag_set(inode, flag)) + return; + + list_del_init(&F2FS_I(inode)->dirty_list); + clear_inode_flag(inode, flag); + stat_dec_dirty_inode(F2FS_I_SB(inode), type); +} + +void f2fs_update_dirty_page(struct inode *inode, struct page *page) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE; + + if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) && + !S_ISLNK(inode->i_mode)) + return; + + spin_lock(&sbi->inode_lock[type]); + if (type != FILE_INODE || test_opt(sbi, DATA_FLUSH)) + __add_dirty_inode(inode, type); + inode_inc_dirty_pages(inode); + spin_unlock(&sbi->inode_lock[type]); + + SetPagePrivate(page); + f2fs_trace_pid(page); +} + +void f2fs_remove_dirty_inode(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE; + + if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) && + !S_ISLNK(inode->i_mode)) + return; + + if (type == FILE_INODE && !test_opt(sbi, DATA_FLUSH)) + return; + + spin_lock(&sbi->inode_lock[type]); + __remove_dirty_inode(inode, type); + spin_unlock(&sbi->inode_lock[type]); +} + +int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type) +{ + struct list_head *head; + struct inode *inode; + struct f2fs_inode_info *fi; + bool is_dir = (type == DIR_INODE); + unsigned long ino = 0; + + trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir, + get_pages(sbi, is_dir ? + F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA)); +retry: + if (unlikely(f2fs_cp_error(sbi))) { + trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir, + get_pages(sbi, is_dir ? + F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA)); + return -EIO; + } + + spin_lock(&sbi->inode_lock[type]); + + head = &sbi->inode_list[type]; + if (list_empty(head)) { + spin_unlock(&sbi->inode_lock[type]); + trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir, + get_pages(sbi, is_dir ? + F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA)); + return 0; + } + fi = list_first_entry(head, struct f2fs_inode_info, dirty_list); + inode = igrab(&fi->vfs_inode); + spin_unlock(&sbi->inode_lock[type]); + if (inode) { + unsigned long cur_ino = inode->i_ino; + + if (is_dir) + F2FS_I(inode)->cp_task = current; + + filemap_fdatawrite(inode->i_mapping); + + if (is_dir) + F2FS_I(inode)->cp_task = NULL; + + iput(inode); + /* We need to give cpu to another writers. */ + if (ino == cur_ino) + cond_resched(); + else + ino = cur_ino; + } else { + /* + * We should submit bio, since it exists several + * wribacking dentry pages in the freeing inode. + */ + f2fs_submit_merged_write(sbi, DATA); + cond_resched(); + } + goto retry; +} + +int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi) +{ + struct list_head *head = &sbi->inode_list[DIRTY_META]; + struct inode *inode; + struct f2fs_inode_info *fi; + s64 total = get_pages(sbi, F2FS_DIRTY_IMETA); + + while (total--) { + if (unlikely(f2fs_cp_error(sbi))) + return -EIO; + + spin_lock(&sbi->inode_lock[DIRTY_META]); + if (list_empty(head)) { + spin_unlock(&sbi->inode_lock[DIRTY_META]); + return 0; + } + fi = list_first_entry(head, struct f2fs_inode_info, + gdirty_list); + inode = igrab(&fi->vfs_inode); + spin_unlock(&sbi->inode_lock[DIRTY_META]); + if (inode) { + sync_inode_metadata(inode, 0); + + /* it's on eviction */ + if (is_inode_flag_set(inode, FI_DIRTY_INODE)) + f2fs_update_inode_page(inode); + iput(inode); + } + } + return 0; +} + +static void __prepare_cp_block(struct f2fs_sb_info *sbi) +{ + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + struct f2fs_nm_info *nm_i = NM_I(sbi); + nid_t last_nid = nm_i->next_scan_nid; + + next_free_nid(sbi, &last_nid); + ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi)); + ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi)); + ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi)); + ckpt->next_free_nid = cpu_to_le32(last_nid); +} + +/* + * Freeze all the FS-operations for checkpoint. + */ +static int block_operations(struct f2fs_sb_info *sbi) +{ + struct writeback_control wbc = { + .sync_mode = WB_SYNC_ALL, + .nr_to_write = LONG_MAX, + .for_reclaim = 0, + }; + struct blk_plug plug; + int err = 0; + + blk_start_plug(&plug); + +retry_flush_dents: + f2fs_lock_all(sbi); + /* write all the dirty dentry pages */ + if (get_pages(sbi, F2FS_DIRTY_DENTS)) { + f2fs_unlock_all(sbi); + err = f2fs_sync_dirty_inodes(sbi, DIR_INODE); + if (err) + goto out; + cond_resched(); + goto retry_flush_dents; + } + + /* + * POR: we should ensure that there are no dirty node pages + * until finishing nat/sit flush. inode->i_blocks can be updated. + */ + down_write(&sbi->node_change); + + if (get_pages(sbi, F2FS_DIRTY_IMETA)) { + up_write(&sbi->node_change); + f2fs_unlock_all(sbi); + err = f2fs_sync_inode_meta(sbi); + if (err) + goto out; + cond_resched(); + goto retry_flush_dents; + } + +retry_flush_nodes: + down_write(&sbi->node_write); + + if (get_pages(sbi, F2FS_DIRTY_NODES)) { + up_write(&sbi->node_write); + atomic_inc(&sbi->wb_sync_req[NODE]); + err = f2fs_sync_node_pages(sbi, &wbc, false, FS_CP_NODE_IO); + atomic_dec(&sbi->wb_sync_req[NODE]); + if (err) { + up_write(&sbi->node_change); + f2fs_unlock_all(sbi); + goto out; + } + cond_resched(); + goto retry_flush_nodes; + } + + /* + * sbi->node_change is used only for AIO write_begin path which produces + * dirty node blocks and some checkpoint values by block allocation. + */ + __prepare_cp_block(sbi); + up_write(&sbi->node_change); +out: + blk_finish_plug(&plug); + return err; +} + +static void unblock_operations(struct f2fs_sb_info *sbi) +{ + up_write(&sbi->node_write); + f2fs_unlock_all(sbi); +} + +void f2fs_wait_on_all_pages_writeback(struct f2fs_sb_info *sbi) +{ + DEFINE_WAIT(wait); + + for (;;) { + prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE); + + if (!get_pages(sbi, F2FS_WB_CP_DATA)) + break; + + if (unlikely(f2fs_cp_error(sbi))) + break; + + io_schedule_timeout(5*HZ); + } + finish_wait(&sbi->cp_wait, &wait); +} + +static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc) +{ + unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num; + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + unsigned long flags; + + spin_lock_irqsave(&sbi->cp_lock, flags); + + if ((cpc->reason & CP_UMOUNT) && + le32_to_cpu(ckpt->cp_pack_total_block_count) > + sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks) + disable_nat_bits(sbi, false); + + if (cpc->reason & CP_TRIMMED) + __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG); + else + __clear_ckpt_flags(ckpt, CP_TRIMMED_FLAG); + + if (cpc->reason & CP_UMOUNT) + __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG); + else + __clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG); + + if (cpc->reason & CP_FASTBOOT) + __set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG); + else + __clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG); + + if (orphan_num) + __set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG); + else + __clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG); + + if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) + __set_ckpt_flags(ckpt, CP_FSCK_FLAG); + + /* set this flag to activate crc|cp_ver for recovery */ + __set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG); + __clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG); + + spin_unlock_irqrestore(&sbi->cp_lock, flags); +} + +static void commit_checkpoint(struct f2fs_sb_info *sbi, + void *src, block_t blk_addr) +{ + struct writeback_control wbc = { + .for_reclaim = 0, + }; + + /* + * pagevec_lookup_tag and lock_page again will take + * some extra time. Therefore, f2fs_update_meta_pages and + * f2fs_sync_meta_pages are combined in this function. + */ + struct page *page = f2fs_grab_meta_page(sbi, blk_addr); + int err; + + memcpy(page_address(page), src, PAGE_SIZE); + set_page_dirty(page); + + f2fs_wait_on_page_writeback(page, META, true); + f2fs_bug_on(sbi, PageWriteback(page)); + if (unlikely(!clear_page_dirty_for_io(page))) + f2fs_bug_on(sbi, 1); + + /* writeout cp pack 2 page */ + err = __f2fs_write_meta_page(page, &wbc, FS_CP_META_IO); + if (unlikely(err && f2fs_cp_error(sbi))) { + f2fs_put_page(page, 1); + return; + } + + f2fs_bug_on(sbi, err); + f2fs_put_page(page, 0); + + /* submit checkpoint (with barrier if NOBARRIER is not set) */ + f2fs_submit_merged_write(sbi, META_FLUSH); +} + +static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) +{ + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + struct f2fs_nm_info *nm_i = NM_I(sbi); + unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num, flags; + block_t start_blk; + unsigned int data_sum_blocks, orphan_blocks; + __u32 crc32 = 0; + int i; + int cp_payload_blks = __cp_payload(sbi); + struct super_block *sb = sbi->sb; + struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE); + u64 kbytes_written; + int err; + + /* Flush all the NAT/SIT pages */ + while (get_pages(sbi, F2FS_DIRTY_META)) { + f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO); + if (unlikely(f2fs_cp_error(sbi))) + break; + } + + /* + * modify checkpoint + * version number is already updated + */ + ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi, true)); + ckpt->free_segment_count = cpu_to_le32(free_segments(sbi)); + for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) { + ckpt->cur_node_segno[i] = + cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE)); + ckpt->cur_node_blkoff[i] = + cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE)); + ckpt->alloc_type[i + CURSEG_HOT_NODE] = + curseg_alloc_type(sbi, i + CURSEG_HOT_NODE); + } + for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) { + ckpt->cur_data_segno[i] = + cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA)); + ckpt->cur_data_blkoff[i] = + cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA)); + ckpt->alloc_type[i + CURSEG_HOT_DATA] = + curseg_alloc_type(sbi, i + CURSEG_HOT_DATA); + } + + /* 2 cp + n data seg summary + orphan inode blocks */ + data_sum_blocks = f2fs_npages_for_summary_flush(sbi, false); + spin_lock_irqsave(&sbi->cp_lock, flags); + if (data_sum_blocks < NR_CURSEG_DATA_TYPE) + __set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG); + else + __clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG); + spin_unlock_irqrestore(&sbi->cp_lock, flags); + + orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num); + ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks + + orphan_blocks); + + if (__remain_node_summaries(cpc->reason)) + ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+ + cp_payload_blks + data_sum_blocks + + orphan_blocks + NR_CURSEG_NODE_TYPE); + else + ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS + + cp_payload_blks + data_sum_blocks + + orphan_blocks); + + /* update ckpt flag for checkpoint */ + update_ckpt_flags(sbi, cpc); + + /* update SIT/NAT bitmap */ + get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP)); + get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP)); + + crc32 = f2fs_crc32(sbi, ckpt, le32_to_cpu(ckpt->checksum_offset)); + *((__le32 *)((unsigned char *)ckpt + + le32_to_cpu(ckpt->checksum_offset))) + = cpu_to_le32(crc32); + + start_blk = __start_cp_next_addr(sbi); + + /* write nat bits */ + if (enabled_nat_bits(sbi, cpc)) { + __u64 cp_ver = cur_cp_version(ckpt); + block_t blk; + + cp_ver |= ((__u64)crc32 << 32); + *(__le64 *)nm_i->nat_bits = cpu_to_le64(cp_ver); + + blk = start_blk + sbi->blocks_per_seg - nm_i->nat_bits_blocks; + for (i = 0; i < nm_i->nat_bits_blocks; i++) + f2fs_update_meta_page(sbi, nm_i->nat_bits + + (i << F2FS_BLKSIZE_BITS), blk + i); + + /* Flush all the NAT BITS pages */ + while (get_pages(sbi, F2FS_DIRTY_META)) { + f2fs_sync_meta_pages(sbi, META, LONG_MAX, + FS_CP_META_IO); + if (unlikely(f2fs_cp_error(sbi))) + break; + } + } + + /* write out checkpoint buffer at block 0 */ + f2fs_update_meta_page(sbi, ckpt, start_blk++); + + for (i = 1; i < 1 + cp_payload_blks; i++) + f2fs_update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE, + start_blk++); + + if (orphan_num) { + write_orphan_inodes(sbi, start_blk); + start_blk += orphan_blocks; + } + + f2fs_write_data_summaries(sbi, start_blk); + start_blk += data_sum_blocks; + + /* Record write statistics in the hot node summary */ + kbytes_written = sbi->kbytes_written; + if (sb->s_bdev->bd_part) + kbytes_written += BD_PART_WRITTEN(sbi); + + seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written); + + if (__remain_node_summaries(cpc->reason)) { + f2fs_write_node_summaries(sbi, start_blk); + start_blk += NR_CURSEG_NODE_TYPE; + } + + /* update user_block_counts */ + sbi->last_valid_block_count = sbi->total_valid_block_count; + percpu_counter_set(&sbi->alloc_valid_block_count, 0); + + /* Here, we have one bio having CP pack except cp pack 2 page */ + f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO); + + /* wait for previous submitted meta pages writeback */ + f2fs_wait_on_all_pages_writeback(sbi); + + /* flush all device cache */ + err = f2fs_flush_device_cache(sbi); + if (err) + return err; + + /* barrier and flush checkpoint cp pack 2 page if it can */ + commit_checkpoint(sbi, ckpt, start_blk); + f2fs_wait_on_all_pages_writeback(sbi); + + /* + * invalidate intermediate page cache borrowed from meta inode + * which are used for migration of encrypted inode's blocks. + */ + if (f2fs_sb_has_encrypt(sbi->sb)) + invalidate_mapping_pages(META_MAPPING(sbi), + MAIN_BLKADDR(sbi), MAX_BLKADDR(sbi) - 1); + + f2fs_release_ino_entry(sbi, false); + + f2fs_reset_fsync_node_info(sbi); + + clear_sbi_flag(sbi, SBI_IS_DIRTY); + clear_sbi_flag(sbi, SBI_NEED_CP); + __set_cp_next_pack(sbi); + + /* + * redirty superblock if metadata like node page or inode cache is + * updated during writing checkpoint. + */ + if (get_pages(sbi, F2FS_DIRTY_NODES) || + get_pages(sbi, F2FS_DIRTY_IMETA)) + set_sbi_flag(sbi, SBI_IS_DIRTY); + + f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS)); + + return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0; +} + +/* + * We guarantee that this checkpoint procedure will not fail. + */ +int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) +{ + struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); + unsigned long long ckpt_ver; + int err = 0; + + mutex_lock(&sbi->cp_mutex); + + if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) && + ((cpc->reason & CP_FASTBOOT) || (cpc->reason & CP_SYNC) || + ((cpc->reason & CP_DISCARD) && !sbi->discard_blks))) + goto out; + if (unlikely(f2fs_cp_error(sbi))) { + err = -EIO; + goto out; + } + if (f2fs_readonly(sbi->sb)) { + err = -EROFS; + goto out; + } + + trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops"); + + err = block_operations(sbi); + if (err) + goto out; + + trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops"); + + f2fs_flush_merged_writes(sbi); + + /* this is the case of multiple fstrims without any changes */ + if (cpc->reason & CP_DISCARD) { + if (!f2fs_exist_trim_candidates(sbi, cpc)) { + unblock_operations(sbi); + goto out; + } + + if (NM_I(sbi)->dirty_nat_cnt == 0 && + SIT_I(sbi)->dirty_sentries == 0 && + prefree_segments(sbi) == 0) { + f2fs_flush_sit_entries(sbi, cpc); + f2fs_clear_prefree_segments(sbi, cpc); + unblock_operations(sbi); + goto out; + } + } + + /* + * update checkpoint pack index + * Increase the version number so that + * SIT entries and seg summaries are written at correct place + */ + ckpt_ver = cur_cp_version(ckpt); + ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver); + + /* write cached NAT/SIT entries to NAT/SIT area */ + f2fs_flush_nat_entries(sbi, cpc); + f2fs_flush_sit_entries(sbi, cpc); + + /* unlock all the fs_lock[] in do_checkpoint() */ + err = do_checkpoint(sbi, cpc); + if (err) + f2fs_release_discard_addrs(sbi); + else + f2fs_clear_prefree_segments(sbi, cpc); + + unblock_operations(sbi); + stat_inc_cp_count(sbi->stat_info); + + if (cpc->reason & CP_RECOVERY) + f2fs_msg(sbi->sb, KERN_NOTICE, + "checkpoint: version = %llx", ckpt_ver); + + /* do checkpoint periodically */ + f2fs_update_time(sbi, CP_TIME); + trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint"); +out: + mutex_unlock(&sbi->cp_mutex); + return err; +} + +void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi) +{ + int i; + + for (i = 0; i < MAX_INO_ENTRY; i++) { + struct inode_management *im = &sbi->im[i]; + + INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC); + spin_lock_init(&im->ino_lock); + INIT_LIST_HEAD(&im->ino_list); + im->ino_num = 0; + } + + sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS - + NR_CURSEG_TYPE - __cp_payload(sbi)) * + F2FS_ORPHANS_PER_BLOCK; +} + +int __init f2fs_create_checkpoint_caches(void) +{ + ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry", + sizeof(struct ino_entry)); + if (!ino_entry_slab) + return -ENOMEM; + f2fs_inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry", + sizeof(struct inode_entry)); + if (!f2fs_inode_entry_slab) { + kmem_cache_destroy(ino_entry_slab); + return -ENOMEM; + } + return 0; +} + +void f2fs_destroy_checkpoint_caches(void) +{ + kmem_cache_destroy(ino_entry_slab); + kmem_cache_destroy(f2fs_inode_entry_slab); +} |