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f2fs: rebuild nat_bits during umount
If all free_nat_bitmap are available, we can rebuild nat_bits from free_nat_bitmap entirely during umount, let's make another chance to reenable nat_bits for image. Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
Jaegeuk Kim
parent
a4b6817625
commit
94c821fb28
@ -1303,12 +1303,20 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
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struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
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unsigned long flags;
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spin_lock_irqsave(&sbi->cp_lock, flags);
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if (cpc->reason & CP_UMOUNT) {
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if (le32_to_cpu(ckpt->cp_pack_total_block_count) >
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sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks) {
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clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
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f2fs_notice(sbi, "Disable nat_bits due to no space");
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} else if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG) &&
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f2fs_nat_bitmap_enabled(sbi)) {
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f2fs_enable_nat_bits(sbi);
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set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
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f2fs_notice(sbi, "Rebuild and enable nat_bits");
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}
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}
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if ((cpc->reason & CP_UMOUNT) &&
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le32_to_cpu(ckpt->cp_pack_total_block_count) >
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sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks)
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disable_nat_bits(sbi, false);
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spin_lock_irqsave(&sbi->cp_lock, flags);
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if (cpc->reason & CP_TRIMMED)
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__set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
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@ -1494,7 +1502,8 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
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start_blk = __start_cp_next_addr(sbi);
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/* write nat bits */
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if (enabled_nat_bits(sbi, cpc)) {
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if ((cpc->reason & CP_UMOUNT) &&
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is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG)) {
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__u64 cp_ver = cur_cp_version(ckpt);
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block_t blk;
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@ -2073,36 +2073,6 @@ static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
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spin_unlock_irqrestore(&sbi->cp_lock, flags);
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}
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static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
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{
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unsigned long flags;
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unsigned char *nat_bits;
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/*
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* In order to re-enable nat_bits we need to call fsck.f2fs by
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* set_sbi_flag(sbi, SBI_NEED_FSCK). But it may give huge cost,
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* so let's rely on regular fsck or unclean shutdown.
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*/
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if (lock)
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spin_lock_irqsave(&sbi->cp_lock, flags);
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__clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
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nat_bits = NM_I(sbi)->nat_bits;
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NM_I(sbi)->nat_bits = NULL;
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if (lock)
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spin_unlock_irqrestore(&sbi->cp_lock, flags);
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kvfree(nat_bits);
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}
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static inline bool enabled_nat_bits(struct f2fs_sb_info *sbi,
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struct cp_control *cpc)
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{
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bool set = is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
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return (cpc) ? (cpc->reason & CP_UMOUNT) && set : set;
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}
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static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
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{
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down_read(&sbi->cp_rwsem);
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@ -3429,6 +3399,7 @@ int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from);
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int f2fs_truncate_xattr_node(struct inode *inode);
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int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi,
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unsigned int seq_id);
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bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi);
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int f2fs_remove_inode_page(struct inode *inode);
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struct page *f2fs_new_inode_page(struct inode *inode);
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struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
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@ -3453,6 +3424,7 @@ int f2fs_recover_xattr_data(struct inode *inode, struct page *page);
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int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
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int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
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unsigned int segno, struct f2fs_summary_block *sum);
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void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi);
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int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
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int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
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void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi);
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101
fs/f2fs/node.c
101
fs/f2fs/node.c
@ -2213,6 +2213,24 @@ static void __move_free_nid(struct f2fs_sb_info *sbi, struct free_nid *i,
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}
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}
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bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi)
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{
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struct f2fs_nm_info *nm_i = NM_I(sbi);
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unsigned int i;
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bool ret = true;
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down_read(&nm_i->nat_tree_lock);
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for (i = 0; i < nm_i->nat_blocks; i++) {
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if (!test_bit_le(i, nm_i->nat_block_bitmap)) {
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ret = false;
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break;
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}
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}
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up_read(&nm_i->nat_tree_lock);
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return ret;
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}
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static void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid,
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bool set, bool build)
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{
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@ -2884,7 +2902,23 @@ add_out:
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list_add_tail(&nes->set_list, head);
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}
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static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
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static void __update_nat_bits(struct f2fs_nm_info *nm_i, unsigned int nat_ofs,
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unsigned int valid)
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{
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if (valid == 0) {
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__set_bit_le(nat_ofs, nm_i->empty_nat_bits);
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__clear_bit_le(nat_ofs, nm_i->full_nat_bits);
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return;
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}
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__clear_bit_le(nat_ofs, nm_i->empty_nat_bits);
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if (valid == NAT_ENTRY_PER_BLOCK)
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__set_bit_le(nat_ofs, nm_i->full_nat_bits);
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else
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__clear_bit_le(nat_ofs, nm_i->full_nat_bits);
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}
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static void update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
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struct page *page)
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{
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struct f2fs_nm_info *nm_i = NM_I(sbi);
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@ -2893,7 +2927,7 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
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int valid = 0;
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int i = 0;
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if (!enabled_nat_bits(sbi, NULL))
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if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
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return;
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if (nat_index == 0) {
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@ -2904,17 +2938,36 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
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if (le32_to_cpu(nat_blk->entries[i].block_addr) != NULL_ADDR)
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valid++;
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}
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if (valid == 0) {
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__set_bit_le(nat_index, nm_i->empty_nat_bits);
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__clear_bit_le(nat_index, nm_i->full_nat_bits);
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return;
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__update_nat_bits(nm_i, nat_index, valid);
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}
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void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi)
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{
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struct f2fs_nm_info *nm_i = NM_I(sbi);
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unsigned int nat_ofs;
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down_read(&nm_i->nat_tree_lock);
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for (nat_ofs = 0; nat_ofs < nm_i->nat_blocks; nat_ofs++) {
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unsigned int valid = 0, nid_ofs = 0;
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/* handle nid zero due to it should never be used */
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if (unlikely(nat_ofs == 0)) {
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valid = 1;
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nid_ofs = 1;
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}
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for (; nid_ofs < NAT_ENTRY_PER_BLOCK; nid_ofs++) {
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if (!test_bit_le(nid_ofs,
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nm_i->free_nid_bitmap[nat_ofs]))
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valid++;
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}
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__update_nat_bits(nm_i, nat_ofs, valid);
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}
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__clear_bit_le(nat_index, nm_i->empty_nat_bits);
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if (valid == NAT_ENTRY_PER_BLOCK)
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__set_bit_le(nat_index, nm_i->full_nat_bits);
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else
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__clear_bit_le(nat_index, nm_i->full_nat_bits);
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up_read(&nm_i->nat_tree_lock);
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}
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static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
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@ -2933,7 +2986,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
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* #1, flush nat entries to journal in current hot data summary block.
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* #2, flush nat entries to nat page.
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*/
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if (enabled_nat_bits(sbi, cpc) ||
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if ((cpc->reason & CP_UMOUNT) ||
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!__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
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to_journal = false;
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@ -2980,7 +3033,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
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if (to_journal) {
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up_write(&curseg->journal_rwsem);
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} else {
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__update_nat_bits(sbi, start_nid, page);
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update_nat_bits(sbi, start_nid, page);
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f2fs_put_page(page, 1);
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}
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@ -3011,7 +3064,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
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* during unmount, let's flush nat_bits before checking
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* nat_cnt[DIRTY_NAT].
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*/
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if (enabled_nat_bits(sbi, cpc)) {
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if (cpc->reason & CP_UMOUNT) {
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down_write(&nm_i->nat_tree_lock);
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remove_nats_in_journal(sbi);
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up_write(&nm_i->nat_tree_lock);
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@ -3027,7 +3080,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
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* entries, remove all entries from journal and merge them
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* into nat entry set.
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*/
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if (enabled_nat_bits(sbi, cpc) ||
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if (cpc->reason & CP_UMOUNT ||
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!__has_cursum_space(journal,
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nm_i->nat_cnt[DIRTY_NAT], NAT_JOURNAL))
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remove_nats_in_journal(sbi);
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@ -3064,15 +3117,18 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
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__u64 cp_ver = cur_cp_version(ckpt);
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block_t nat_bits_addr;
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if (!enabled_nat_bits(sbi, NULL))
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return 0;
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nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
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nm_i->nat_bits = f2fs_kvzalloc(sbi,
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nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL);
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if (!nm_i->nat_bits)
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return -ENOMEM;
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nm_i->full_nat_bits = nm_i->nat_bits + 8;
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nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
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if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
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return 0;
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nat_bits_addr = __start_cp_addr(sbi) + sbi->blocks_per_seg -
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nm_i->nat_bits_blocks;
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for (i = 0; i < nm_i->nat_bits_blocks; i++) {
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@ -3089,13 +3145,12 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
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cp_ver |= (cur_cp_crc(ckpt) << 32);
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if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits) {
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disable_nat_bits(sbi, true);
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clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
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f2fs_notice(sbi, "Disable nat_bits due to incorrect cp_ver (%llu, %llu)",
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cp_ver, le64_to_cpu(*(__le64 *)nm_i->nat_bits));
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return 0;
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}
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nm_i->full_nat_bits = nm_i->nat_bits + 8;
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nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
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f2fs_notice(sbi, "Found nat_bits in checkpoint");
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return 0;
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}
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@ -3106,7 +3161,7 @@ static inline void load_free_nid_bitmap(struct f2fs_sb_info *sbi)
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unsigned int i = 0;
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nid_t nid, last_nid;
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if (!enabled_nat_bits(sbi, NULL))
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if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
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return;
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for (i = 0; i < nm_i->nat_blocks; i++) {
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