* [PATCH v3] f2fs: rebuild nat_bits during umount
@ 2019-02-16 22:26 Chao Yu
2019-02-28 3:49 ` Chao Yu
0 siblings, 1 reply; 5+ messages in thread
From: Chao Yu @ 2019-02-16 22:26 UTC (permalink / raw)
To: jaegeuk; +Cc: linux-f2fs-devel, linux-kernel, Chao Yu
From: Chao Yu <yuchao0@huawei.com>
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 <yuchao0@huawei.com>
---
v3:
- fix to remove nat journal during umount.
fs/f2fs/checkpoint.c | 23 +++++++++----
fs/f2fs/f2fs.h | 29 ++--------------
fs/f2fs/node.c | 82 +++++++++++++++++++++++++++++++++++++-------
3 files changed, 89 insertions(+), 45 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 10a3ada28715..b4c9de4e6eb0 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1225,12 +1225,22 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
unsigned long flags;
- spin_lock_irqsave(&sbi->cp_lock, flags);
+ if (cpc->reason & CP_UMOUNT) {
+ if (le32_to_cpu(ckpt->cp_pack_total_block_count) >
+ sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks) {
+ clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
+ f2fs_msg(sbi->sb, KERN_NOTICE,
+ "Disable nat_bits due to no space");
+ } else if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG) &&
+ f2fs_nat_bitmap_enabled(sbi)) {
+ f2fs_enable_nat_bits(sbi);
+ set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
+ f2fs_msg(sbi->sb, KERN_NOTICE,
+ "Rebuild and enable nat_bits");
+ }
+ }
- 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);
+ spin_lock_irqsave(&sbi->cp_lock, flags);
if (cpc->reason & CP_TRIMMED)
__set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
@@ -1395,7 +1405,8 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
start_blk = __start_cp_next_addr(sbi);
/* write nat bits */
- if (enabled_nat_bits(sbi, cpc)) {
+ if ((cpc->reason & CP_UMOUNT) &&
+ is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG)) {
__u64 cp_ver = cur_cp_version(ckpt);
block_t blk;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index c0d30810ef8a..a543354fc6bf 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1615,33 +1615,6 @@ static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
spin_unlock_irqrestore(&sbi->cp_lock, flags);
}
-static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
-{
- unsigned long flags;
-
- /*
- * In order to re-enable nat_bits we need to call fsck.f2fs by
- * set_sbi_flag(sbi, SBI_NEED_FSCK). But it may give huge cost,
- * so let's rely on regular fsck or unclean shutdown.
- */
-
- if (lock)
- spin_lock_irqsave(&sbi->cp_lock, flags);
- __clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
- kvfree(NM_I(sbi)->nat_bits);
- NM_I(sbi)->nat_bits = NULL;
- if (lock)
- spin_unlock_irqrestore(&sbi->cp_lock, flags);
-}
-
-static inline bool enabled_nat_bits(struct f2fs_sb_info *sbi,
- struct cp_control *cpc)
-{
- bool set = is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
-
- return (cpc) ? (cpc->reason & CP_UMOUNT) && set : set;
-}
-
static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
{
down_read(&sbi->cp_rwsem);
@@ -2970,6 +2943,7 @@ int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from);
int f2fs_truncate_xattr_node(struct inode *inode);
int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi,
unsigned int seq_id);
+bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi);
int f2fs_remove_inode_page(struct inode *inode);
struct page *f2fs_new_inode_page(struct inode *inode);
struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
@@ -2993,6 +2967,7 @@ int f2fs_recover_xattr_data(struct inode *inode, struct page *page);
int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
unsigned int segno, struct f2fs_summary_block *sum);
+void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi);
int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index f6ff84e29749..e364c6a84f3c 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2038,6 +2038,24 @@ static void __move_free_nid(struct f2fs_sb_info *sbi, struct free_nid *i,
}
}
+bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ unsigned int i;
+ bool ret = true;
+
+ down_read(&nm_i->nat_tree_lock);
+ for (i = 0; i < nm_i->nat_blocks; i++) {
+ if (!test_bit_le(i, nm_i->nat_block_bitmap)) {
+ ret = false;
+ break;
+ }
+ }
+ up_read(&nm_i->nat_tree_lock);
+
+ return ret;
+}
+
static void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid,
bool set, bool build)
{
@@ -2698,7 +2716,7 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
int valid = 0;
int i = 0;
- if (!enabled_nat_bits(sbi, NULL))
+ if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
return;
if (nat_index == 0) {
@@ -2722,6 +2740,43 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
__clear_bit_le(nat_index, nm_i->full_nat_bits);
}
+void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi)
+{
+ struct f2fs_nm_info *nm_i = NM_I(sbi);
+ int nat_ofs;
+
+ down_read(&nm_i->nat_tree_lock);
+
+ for (nat_ofs = 0; nat_ofs < nm_i->nat_blocks; nat_ofs++) {
+ int valid = 0, nid_ofs = 0;
+
+ if (nat_ofs == 0) {
+ valid = 1;
+ nid_ofs = 1;
+ }
+
+ for (; nid_ofs < NAT_ENTRY_PER_BLOCK; nid_ofs++) {
+ if (!test_bit_le(nid_ofs,
+ nm_i->free_nid_bitmap[nat_ofs]))
+ valid++;
+ }
+
+ if (valid == 0) {
+ __set_bit_le(nat_ofs, nm_i->empty_nat_bits);
+ __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
+ continue;
+ }
+
+ __clear_bit_le(nat_ofs, nm_i->empty_nat_bits);
+ if (valid == NAT_ENTRY_PER_BLOCK)
+ __set_bit_le(nat_ofs, nm_i->full_nat_bits);
+ else
+ __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
+ }
+
+ up_read(&nm_i->nat_tree_lock);
+}
+
static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
struct nat_entry_set *set, struct cp_control *cpc)
{
@@ -2738,7 +2793,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
* #1, flush nat entries to journal in current hot data summary block.
* #2, flush nat entries to nat page.
*/
- if (enabled_nat_bits(sbi, cpc) ||
+ if ((cpc->reason & CP_UMOUNT) ||
!__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
to_journal = false;
@@ -2813,7 +2868,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
int err = 0;
/* during unmount, let's flush nat_bits before checking dirty_nat_cnt */
- if (enabled_nat_bits(sbi, cpc)) {
+ if (cpc->reason & CP_UMOUNT) {
down_write(&nm_i->nat_tree_lock);
remove_nats_in_journal(sbi);
up_write(&nm_i->nat_tree_lock);
@@ -2829,7 +2884,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
* entries, remove all entries from journal and merge them
* into nat entry set.
*/
- if (enabled_nat_bits(sbi, cpc) ||
+ if ((cpc->reason & CP_UMOUNT) ||
!__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
remove_nats_in_journal(sbi);
@@ -2864,15 +2919,18 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
__u64 cp_ver = cur_cp_version(ckpt);
block_t nat_bits_addr;
- if (!enabled_nat_bits(sbi, NULL))
- return 0;
-
nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
nm_i->nat_bits = f2fs_kzalloc(sbi,
nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL);
if (!nm_i->nat_bits)
return -ENOMEM;
+ nm_i->full_nat_bits = nm_i->nat_bits + 8;
+ nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
+
+ if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
+ return 0;
+
nat_bits_addr = __start_cp_addr(sbi) + sbi->blocks_per_seg -
nm_i->nat_bits_blocks;
for (i = 0; i < nm_i->nat_bits_blocks; i++) {
@@ -2889,13 +2947,13 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
cp_ver |= (cur_cp_crc(ckpt) << 32);
if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits) {
- disable_nat_bits(sbi, true);
+ clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
+ f2fs_msg(sbi->sb, KERN_NOTICE,
+ "Disable nat_bits due to incorrect cp_ver (%llu, %llu)",
+ cp_ver, le64_to_cpu(*(__le64 *)nm_i->nat_bits));
return 0;
}
- nm_i->full_nat_bits = nm_i->nat_bits + 8;
- nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
-
f2fs_msg(sbi->sb, KERN_NOTICE, "Found nat_bits in checkpoint");
return 0;
}
@@ -2906,7 +2964,7 @@ static inline void load_free_nid_bitmap(struct f2fs_sb_info *sbi)
unsigned int i = 0;
nid_t nid, last_nid;
- if (!enabled_nat_bits(sbi, NULL))
+ if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
return;
for (i = 0; i < nm_i->nat_blocks; i++) {
--
2.18.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH v3] f2fs: rebuild nat_bits during umount
2019-02-16 22:26 [PATCH v3] f2fs: rebuild nat_bits during umount Chao Yu
@ 2019-02-28 3:49 ` Chao Yu
2019-03-01 17:55 ` Jaegeuk Kim
0 siblings, 1 reply; 5+ messages in thread
From: Chao Yu @ 2019-02-28 3:49 UTC (permalink / raw)
To: Chao Yu, jaegeuk; +Cc: linux-f2fs-devel, linux-kernel
Ping,
Could you please try this new version?
On 2019/2/17 6:26, Chao Yu wrote:
> From: Chao Yu <yuchao0@huawei.com>
>
> 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 <yuchao0@huawei.com>
> ---
> v3:
> - fix to remove nat journal during umount.
> fs/f2fs/checkpoint.c | 23 +++++++++----
> fs/f2fs/f2fs.h | 29 ++--------------
> fs/f2fs/node.c | 82 +++++++++++++++++++++++++++++++++++++-------
> 3 files changed, 89 insertions(+), 45 deletions(-)
>
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index 10a3ada28715..b4c9de4e6eb0 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -1225,12 +1225,22 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
> unsigned long flags;
>
> - spin_lock_irqsave(&sbi->cp_lock, flags);
> + if (cpc->reason & CP_UMOUNT) {
> + if (le32_to_cpu(ckpt->cp_pack_total_block_count) >
> + sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks) {
> + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
> + f2fs_msg(sbi->sb, KERN_NOTICE,
> + "Disable nat_bits due to no space");
> + } else if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG) &&
> + f2fs_nat_bitmap_enabled(sbi)) {
> + f2fs_enable_nat_bits(sbi);
> + set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
> + f2fs_msg(sbi->sb, KERN_NOTICE,
> + "Rebuild and enable nat_bits");
> + }
> + }
>
> - 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);
> + spin_lock_irqsave(&sbi->cp_lock, flags);
>
> if (cpc->reason & CP_TRIMMED)
> __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
> @@ -1395,7 +1405,8 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> start_blk = __start_cp_next_addr(sbi);
>
> /* write nat bits */
> - if (enabled_nat_bits(sbi, cpc)) {
> + if ((cpc->reason & CP_UMOUNT) &&
> + is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG)) {
> __u64 cp_ver = cur_cp_version(ckpt);
> block_t blk;
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index c0d30810ef8a..a543354fc6bf 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -1615,33 +1615,6 @@ static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
> spin_unlock_irqrestore(&sbi->cp_lock, flags);
> }
>
> -static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
> -{
> - unsigned long flags;
> -
> - /*
> - * In order to re-enable nat_bits we need to call fsck.f2fs by
> - * set_sbi_flag(sbi, SBI_NEED_FSCK). But it may give huge cost,
> - * so let's rely on regular fsck or unclean shutdown.
> - */
> -
> - if (lock)
> - spin_lock_irqsave(&sbi->cp_lock, flags);
> - __clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
> - kvfree(NM_I(sbi)->nat_bits);
> - NM_I(sbi)->nat_bits = NULL;
> - if (lock)
> - spin_unlock_irqrestore(&sbi->cp_lock, flags);
> -}
> -
> -static inline bool enabled_nat_bits(struct f2fs_sb_info *sbi,
> - struct cp_control *cpc)
> -{
> - bool set = is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
> -
> - return (cpc) ? (cpc->reason & CP_UMOUNT) && set : set;
> -}
> -
> static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
> {
> down_read(&sbi->cp_rwsem);
> @@ -2970,6 +2943,7 @@ int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from);
> int f2fs_truncate_xattr_node(struct inode *inode);
> int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi,
> unsigned int seq_id);
> +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi);
> int f2fs_remove_inode_page(struct inode *inode);
> struct page *f2fs_new_inode_page(struct inode *inode);
> struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
> @@ -2993,6 +2967,7 @@ int f2fs_recover_xattr_data(struct inode *inode, struct page *page);
> int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
> int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
> unsigned int segno, struct f2fs_summary_block *sum);
> +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi);
> int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
> int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
> void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi);
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index f6ff84e29749..e364c6a84f3c 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -2038,6 +2038,24 @@ static void __move_free_nid(struct f2fs_sb_info *sbi, struct free_nid *i,
> }
> }
>
> +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi)
> +{
> + struct f2fs_nm_info *nm_i = NM_I(sbi);
> + unsigned int i;
> + bool ret = true;
> +
> + down_read(&nm_i->nat_tree_lock);
> + for (i = 0; i < nm_i->nat_blocks; i++) {
> + if (!test_bit_le(i, nm_i->nat_block_bitmap)) {
> + ret = false;
> + break;
> + }
> + }
> + up_read(&nm_i->nat_tree_lock);
> +
> + return ret;
> +}
> +
> static void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid,
> bool set, bool build)
> {
> @@ -2698,7 +2716,7 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
> int valid = 0;
> int i = 0;
>
> - if (!enabled_nat_bits(sbi, NULL))
> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
> return;
>
> if (nat_index == 0) {
> @@ -2722,6 +2740,43 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
> __clear_bit_le(nat_index, nm_i->full_nat_bits);
> }
>
> +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi)
> +{
> + struct f2fs_nm_info *nm_i = NM_I(sbi);
> + int nat_ofs;
> +
> + down_read(&nm_i->nat_tree_lock);
> +
> + for (nat_ofs = 0; nat_ofs < nm_i->nat_blocks; nat_ofs++) {
> + int valid = 0, nid_ofs = 0;
> +
> + if (nat_ofs == 0) {
> + valid = 1;
> + nid_ofs = 1;
> + }
> +
> + for (; nid_ofs < NAT_ENTRY_PER_BLOCK; nid_ofs++) {
> + if (!test_bit_le(nid_ofs,
> + nm_i->free_nid_bitmap[nat_ofs]))
> + valid++;
> + }
> +
> + if (valid == 0) {
> + __set_bit_le(nat_ofs, nm_i->empty_nat_bits);
> + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
> + continue;
> + }
> +
> + __clear_bit_le(nat_ofs, nm_i->empty_nat_bits);
> + if (valid == NAT_ENTRY_PER_BLOCK)
> + __set_bit_le(nat_ofs, nm_i->full_nat_bits);
> + else
> + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
> + }
> +
> + up_read(&nm_i->nat_tree_lock);
> +}
> +
> static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
> struct nat_entry_set *set, struct cp_control *cpc)
> {
> @@ -2738,7 +2793,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
> * #1, flush nat entries to journal in current hot data summary block.
> * #2, flush nat entries to nat page.
> */
> - if (enabled_nat_bits(sbi, cpc) ||
> + if ((cpc->reason & CP_UMOUNT) ||
> !__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
> to_journal = false;
>
> @@ -2813,7 +2868,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> int err = 0;
>
> /* during unmount, let's flush nat_bits before checking dirty_nat_cnt */
> - if (enabled_nat_bits(sbi, cpc)) {
> + if (cpc->reason & CP_UMOUNT) {
> down_write(&nm_i->nat_tree_lock);
> remove_nats_in_journal(sbi);
> up_write(&nm_i->nat_tree_lock);
> @@ -2829,7 +2884,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> * entries, remove all entries from journal and merge them
> * into nat entry set.
> */
> - if (enabled_nat_bits(sbi, cpc) ||
> + if ((cpc->reason & CP_UMOUNT) ||
> !__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
> remove_nats_in_journal(sbi);
>
> @@ -2864,15 +2919,18 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
> __u64 cp_ver = cur_cp_version(ckpt);
> block_t nat_bits_addr;
>
> - if (!enabled_nat_bits(sbi, NULL))
> - return 0;
> -
> nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
> nm_i->nat_bits = f2fs_kzalloc(sbi,
> nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL);
> if (!nm_i->nat_bits)
> return -ENOMEM;
>
> + nm_i->full_nat_bits = nm_i->nat_bits + 8;
> + nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
> +
> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
> + return 0;
> +
> nat_bits_addr = __start_cp_addr(sbi) + sbi->blocks_per_seg -
> nm_i->nat_bits_blocks;
> for (i = 0; i < nm_i->nat_bits_blocks; i++) {
> @@ -2889,13 +2947,13 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
>
> cp_ver |= (cur_cp_crc(ckpt) << 32);
> if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits) {
> - disable_nat_bits(sbi, true);
> + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
> + f2fs_msg(sbi->sb, KERN_NOTICE,
> + "Disable nat_bits due to incorrect cp_ver (%llu, %llu)",
> + cp_ver, le64_to_cpu(*(__le64 *)nm_i->nat_bits));
> return 0;
> }
>
> - nm_i->full_nat_bits = nm_i->nat_bits + 8;
> - nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
> -
> f2fs_msg(sbi->sb, KERN_NOTICE, "Found nat_bits in checkpoint");
> return 0;
> }
> @@ -2906,7 +2964,7 @@ static inline void load_free_nid_bitmap(struct f2fs_sb_info *sbi)
> unsigned int i = 0;
> nid_t nid, last_nid;
>
> - if (!enabled_nat_bits(sbi, NULL))
> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
> return;
>
> for (i = 0; i < nm_i->nat_blocks; i++) {
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v3] f2fs: rebuild nat_bits during umount
2019-02-28 3:49 ` Chao Yu
@ 2019-03-01 17:55 ` Jaegeuk Kim
2019-03-04 6:27 ` Chao Yu
0 siblings, 1 reply; 5+ messages in thread
From: Jaegeuk Kim @ 2019-03-01 17:55 UTC (permalink / raw)
To: Chao Yu; +Cc: Chao Yu, linux-f2fs-devel, linux-kernel
On 02/28, Chao Yu wrote:
> Ping,
>
> Could you please try this new version?
It's in the queue, and I'll test this after the next pull request.
>
> On 2019/2/17 6:26, Chao Yu wrote:
> > From: Chao Yu <yuchao0@huawei.com>
> >
> > 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 <yuchao0@huawei.com>
> > ---
> > v3:
> > - fix to remove nat journal during umount.
> > fs/f2fs/checkpoint.c | 23 +++++++++----
> > fs/f2fs/f2fs.h | 29 ++--------------
> > fs/f2fs/node.c | 82 +++++++++++++++++++++++++++++++++++++-------
> > 3 files changed, 89 insertions(+), 45 deletions(-)
> >
> > diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> > index 10a3ada28715..b4c9de4e6eb0 100644
> > --- a/fs/f2fs/checkpoint.c
> > +++ b/fs/f2fs/checkpoint.c
> > @@ -1225,12 +1225,22 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> > struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
> > unsigned long flags;
> >
> > - spin_lock_irqsave(&sbi->cp_lock, flags);
> > + if (cpc->reason & CP_UMOUNT) {
> > + if (le32_to_cpu(ckpt->cp_pack_total_block_count) >
> > + sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks) {
> > + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
> > + f2fs_msg(sbi->sb, KERN_NOTICE,
> > + "Disable nat_bits due to no space");
> > + } else if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG) &&
> > + f2fs_nat_bitmap_enabled(sbi)) {
> > + f2fs_enable_nat_bits(sbi);
> > + set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
> > + f2fs_msg(sbi->sb, KERN_NOTICE,
> > + "Rebuild and enable nat_bits");
> > + }
> > + }
> >
> > - 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);
> > + spin_lock_irqsave(&sbi->cp_lock, flags);
> >
> > if (cpc->reason & CP_TRIMMED)
> > __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
> > @@ -1395,7 +1405,8 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> > start_blk = __start_cp_next_addr(sbi);
> >
> > /* write nat bits */
> > - if (enabled_nat_bits(sbi, cpc)) {
> > + if ((cpc->reason & CP_UMOUNT) &&
> > + is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG)) {
> > __u64 cp_ver = cur_cp_version(ckpt);
> > block_t blk;
> >
> > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > index c0d30810ef8a..a543354fc6bf 100644
> > --- a/fs/f2fs/f2fs.h
> > +++ b/fs/f2fs/f2fs.h
> > @@ -1615,33 +1615,6 @@ static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
> > spin_unlock_irqrestore(&sbi->cp_lock, flags);
> > }
> >
> > -static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
> > -{
> > - unsigned long flags;
> > -
> > - /*
> > - * In order to re-enable nat_bits we need to call fsck.f2fs by
> > - * set_sbi_flag(sbi, SBI_NEED_FSCK). But it may give huge cost,
> > - * so let's rely on regular fsck or unclean shutdown.
> > - */
> > -
> > - if (lock)
> > - spin_lock_irqsave(&sbi->cp_lock, flags);
> > - __clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
> > - kvfree(NM_I(sbi)->nat_bits);
> > - NM_I(sbi)->nat_bits = NULL;
> > - if (lock)
> > - spin_unlock_irqrestore(&sbi->cp_lock, flags);
> > -}
> > -
> > -static inline bool enabled_nat_bits(struct f2fs_sb_info *sbi,
> > - struct cp_control *cpc)
> > -{
> > - bool set = is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
> > -
> > - return (cpc) ? (cpc->reason & CP_UMOUNT) && set : set;
> > -}
> > -
> > static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
> > {
> > down_read(&sbi->cp_rwsem);
> > @@ -2970,6 +2943,7 @@ int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from);
> > int f2fs_truncate_xattr_node(struct inode *inode);
> > int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi,
> > unsigned int seq_id);
> > +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi);
> > int f2fs_remove_inode_page(struct inode *inode);
> > struct page *f2fs_new_inode_page(struct inode *inode);
> > struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
> > @@ -2993,6 +2967,7 @@ int f2fs_recover_xattr_data(struct inode *inode, struct page *page);
> > int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
> > int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
> > unsigned int segno, struct f2fs_summary_block *sum);
> > +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi);
> > int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
> > int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
> > void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi);
> > diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> > index f6ff84e29749..e364c6a84f3c 100644
> > --- a/fs/f2fs/node.c
> > +++ b/fs/f2fs/node.c
> > @@ -2038,6 +2038,24 @@ static void __move_free_nid(struct f2fs_sb_info *sbi, struct free_nid *i,
> > }
> > }
> >
> > +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi)
> > +{
> > + struct f2fs_nm_info *nm_i = NM_I(sbi);
> > + unsigned int i;
> > + bool ret = true;
> > +
> > + down_read(&nm_i->nat_tree_lock);
> > + for (i = 0; i < nm_i->nat_blocks; i++) {
> > + if (!test_bit_le(i, nm_i->nat_block_bitmap)) {
> > + ret = false;
> > + break;
> > + }
> > + }
> > + up_read(&nm_i->nat_tree_lock);
> > +
> > + return ret;
> > +}
> > +
> > static void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid,
> > bool set, bool build)
> > {
> > @@ -2698,7 +2716,7 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
> > int valid = 0;
> > int i = 0;
> >
> > - if (!enabled_nat_bits(sbi, NULL))
> > + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
> > return;
> >
> > if (nat_index == 0) {
> > @@ -2722,6 +2740,43 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
> > __clear_bit_le(nat_index, nm_i->full_nat_bits);
> > }
> >
> > +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi)
> > +{
> > + struct f2fs_nm_info *nm_i = NM_I(sbi);
> > + int nat_ofs;
> > +
> > + down_read(&nm_i->nat_tree_lock);
> > +
> > + for (nat_ofs = 0; nat_ofs < nm_i->nat_blocks; nat_ofs++) {
> > + int valid = 0, nid_ofs = 0;
> > +
> > + if (nat_ofs == 0) {
> > + valid = 1;
> > + nid_ofs = 1;
> > + }
> > +
> > + for (; nid_ofs < NAT_ENTRY_PER_BLOCK; nid_ofs++) {
> > + if (!test_bit_le(nid_ofs,
> > + nm_i->free_nid_bitmap[nat_ofs]))
> > + valid++;
> > + }
> > +
> > + if (valid == 0) {
> > + __set_bit_le(nat_ofs, nm_i->empty_nat_bits);
> > + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
> > + continue;
> > + }
> > +
> > + __clear_bit_le(nat_ofs, nm_i->empty_nat_bits);
> > + if (valid == NAT_ENTRY_PER_BLOCK)
> > + __set_bit_le(nat_ofs, nm_i->full_nat_bits);
> > + else
> > + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
> > + }
> > +
> > + up_read(&nm_i->nat_tree_lock);
> > +}
> > +
> > static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
> > struct nat_entry_set *set, struct cp_control *cpc)
> > {
> > @@ -2738,7 +2793,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
> > * #1, flush nat entries to journal in current hot data summary block.
> > * #2, flush nat entries to nat page.
> > */
> > - if (enabled_nat_bits(sbi, cpc) ||
> > + if ((cpc->reason & CP_UMOUNT) ||
> > !__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
> > to_journal = false;
> >
> > @@ -2813,7 +2868,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> > int err = 0;
> >
> > /* during unmount, let's flush nat_bits before checking dirty_nat_cnt */
> > - if (enabled_nat_bits(sbi, cpc)) {
> > + if (cpc->reason & CP_UMOUNT) {
> > down_write(&nm_i->nat_tree_lock);
> > remove_nats_in_journal(sbi);
> > up_write(&nm_i->nat_tree_lock);
> > @@ -2829,7 +2884,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> > * entries, remove all entries from journal and merge them
> > * into nat entry set.
> > */
> > - if (enabled_nat_bits(sbi, cpc) ||
> > + if ((cpc->reason & CP_UMOUNT) ||
> > !__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
> > remove_nats_in_journal(sbi);
> >
> > @@ -2864,15 +2919,18 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
> > __u64 cp_ver = cur_cp_version(ckpt);
> > block_t nat_bits_addr;
> >
> > - if (!enabled_nat_bits(sbi, NULL))
> > - return 0;
> > -
> > nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
> > nm_i->nat_bits = f2fs_kzalloc(sbi,
> > nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL);
> > if (!nm_i->nat_bits)
> > return -ENOMEM;
> >
> > + nm_i->full_nat_bits = nm_i->nat_bits + 8;
> > + nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
> > +
> > + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
> > + return 0;
> > +
> > nat_bits_addr = __start_cp_addr(sbi) + sbi->blocks_per_seg -
> > nm_i->nat_bits_blocks;
> > for (i = 0; i < nm_i->nat_bits_blocks; i++) {
> > @@ -2889,13 +2947,13 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
> >
> > cp_ver |= (cur_cp_crc(ckpt) << 32);
> > if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits) {
> > - disable_nat_bits(sbi, true);
> > + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
> > + f2fs_msg(sbi->sb, KERN_NOTICE,
> > + "Disable nat_bits due to incorrect cp_ver (%llu, %llu)",
> > + cp_ver, le64_to_cpu(*(__le64 *)nm_i->nat_bits));
> > return 0;
> > }
> >
> > - nm_i->full_nat_bits = nm_i->nat_bits + 8;
> > - nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
> > -
> > f2fs_msg(sbi->sb, KERN_NOTICE, "Found nat_bits in checkpoint");
> > return 0;
> > }
> > @@ -2906,7 +2964,7 @@ static inline void load_free_nid_bitmap(struct f2fs_sb_info *sbi)
> > unsigned int i = 0;
> > nid_t nid, last_nid;
> >
> > - if (!enabled_nat_bits(sbi, NULL))
> > + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
> > return;
> >
> > for (i = 0; i < nm_i->nat_blocks; i++) {
> >
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v3] f2fs: rebuild nat_bits during umount
2019-03-01 17:55 ` Jaegeuk Kim
@ 2019-03-04 6:27 ` Chao Yu
2021-08-20 10:56 ` [f2fs-dev] " Chao Yu
0 siblings, 1 reply; 5+ messages in thread
From: Chao Yu @ 2019-03-04 6:27 UTC (permalink / raw)
To: Jaegeuk Kim; +Cc: Chao Yu, linux-f2fs-devel, linux-kernel
On 2019/3/2 1:55, Jaegeuk Kim wrote:
> On 02/28, Chao Yu wrote:
>> Ping,
>>
>> Could you please try this new version?
>
> It's in the queue, and I'll test this after the next pull request.
Okay. :)
Thanks,
>
>>
>> On 2019/2/17 6:26, Chao Yu wrote:
>>> From: Chao Yu <yuchao0@huawei.com>
>>>
>>> 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 <yuchao0@huawei.com>
>>> ---
>>> v3:
>>> - fix to remove nat journal during umount.
>>> fs/f2fs/checkpoint.c | 23 +++++++++----
>>> fs/f2fs/f2fs.h | 29 ++--------------
>>> fs/f2fs/node.c | 82 +++++++++++++++++++++++++++++++++++++-------
>>> 3 files changed, 89 insertions(+), 45 deletions(-)
>>>
>>> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
>>> index 10a3ada28715..b4c9de4e6eb0 100644
>>> --- a/fs/f2fs/checkpoint.c
>>> +++ b/fs/f2fs/checkpoint.c
>>> @@ -1225,12 +1225,22 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>> struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
>>> unsigned long flags;
>>>
>>> - spin_lock_irqsave(&sbi->cp_lock, flags);
>>> + if (cpc->reason & CP_UMOUNT) {
>>> + if (le32_to_cpu(ckpt->cp_pack_total_block_count) >
>>> + sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks) {
>>> + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>> + f2fs_msg(sbi->sb, KERN_NOTICE,
>>> + "Disable nat_bits due to no space");
>>> + } else if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG) &&
>>> + f2fs_nat_bitmap_enabled(sbi)) {
>>> + f2fs_enable_nat_bits(sbi);
>>> + set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>> + f2fs_msg(sbi->sb, KERN_NOTICE,
>>> + "Rebuild and enable nat_bits");
>>> + }
>>> + }
>>>
>>> - 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);
>>> + spin_lock_irqsave(&sbi->cp_lock, flags);
>>>
>>> if (cpc->reason & CP_TRIMMED)
>>> __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
>>> @@ -1395,7 +1405,8 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>> start_blk = __start_cp_next_addr(sbi);
>>>
>>> /* write nat bits */
>>> - if (enabled_nat_bits(sbi, cpc)) {
>>> + if ((cpc->reason & CP_UMOUNT) &&
>>> + is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG)) {
>>> __u64 cp_ver = cur_cp_version(ckpt);
>>> block_t blk;
>>>
>>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
>>> index c0d30810ef8a..a543354fc6bf 100644
>>> --- a/fs/f2fs/f2fs.h
>>> +++ b/fs/f2fs/f2fs.h
>>> @@ -1615,33 +1615,6 @@ static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
>>> spin_unlock_irqrestore(&sbi->cp_lock, flags);
>>> }
>>>
>>> -static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
>>> -{
>>> - unsigned long flags;
>>> -
>>> - /*
>>> - * In order to re-enable nat_bits we need to call fsck.f2fs by
>>> - * set_sbi_flag(sbi, SBI_NEED_FSCK). But it may give huge cost,
>>> - * so let's rely on regular fsck or unclean shutdown.
>>> - */
>>> -
>>> - if (lock)
>>> - spin_lock_irqsave(&sbi->cp_lock, flags);
>>> - __clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
>>> - kvfree(NM_I(sbi)->nat_bits);
>>> - NM_I(sbi)->nat_bits = NULL;
>>> - if (lock)
>>> - spin_unlock_irqrestore(&sbi->cp_lock, flags);
>>> -}
>>> -
>>> -static inline bool enabled_nat_bits(struct f2fs_sb_info *sbi,
>>> - struct cp_control *cpc)
>>> -{
>>> - bool set = is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>> -
>>> - return (cpc) ? (cpc->reason & CP_UMOUNT) && set : set;
>>> -}
>>> -
>>> static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
>>> {
>>> down_read(&sbi->cp_rwsem);
>>> @@ -2970,6 +2943,7 @@ int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from);
>>> int f2fs_truncate_xattr_node(struct inode *inode);
>>> int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi,
>>> unsigned int seq_id);
>>> +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi);
>>> int f2fs_remove_inode_page(struct inode *inode);
>>> struct page *f2fs_new_inode_page(struct inode *inode);
>>> struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
>>> @@ -2993,6 +2967,7 @@ int f2fs_recover_xattr_data(struct inode *inode, struct page *page);
>>> int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
>>> int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
>>> unsigned int segno, struct f2fs_summary_block *sum);
>>> +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi);
>>> int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
>>> int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
>>> void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi);
>>> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
>>> index f6ff84e29749..e364c6a84f3c 100644
>>> --- a/fs/f2fs/node.c
>>> +++ b/fs/f2fs/node.c
>>> @@ -2038,6 +2038,24 @@ static void __move_free_nid(struct f2fs_sb_info *sbi, struct free_nid *i,
>>> }
>>> }
>>>
>>> +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi)
>>> +{
>>> + struct f2fs_nm_info *nm_i = NM_I(sbi);
>>> + unsigned int i;
>>> + bool ret = true;
>>> +
>>> + down_read(&nm_i->nat_tree_lock);
>>> + for (i = 0; i < nm_i->nat_blocks; i++) {
>>> + if (!test_bit_le(i, nm_i->nat_block_bitmap)) {
>>> + ret = false;
>>> + break;
>>> + }
>>> + }
>>> + up_read(&nm_i->nat_tree_lock);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> static void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid,
>>> bool set, bool build)
>>> {
>>> @@ -2698,7 +2716,7 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
>>> int valid = 0;
>>> int i = 0;
>>>
>>> - if (!enabled_nat_bits(sbi, NULL))
>>> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
>>> return;
>>>
>>> if (nat_index == 0) {
>>> @@ -2722,6 +2740,43 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
>>> __clear_bit_le(nat_index, nm_i->full_nat_bits);
>>> }
>>>
>>> +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi)
>>> +{
>>> + struct f2fs_nm_info *nm_i = NM_I(sbi);
>>> + int nat_ofs;
>>> +
>>> + down_read(&nm_i->nat_tree_lock);
>>> +
>>> + for (nat_ofs = 0; nat_ofs < nm_i->nat_blocks; nat_ofs++) {
>>> + int valid = 0, nid_ofs = 0;
>>> +
>>> + if (nat_ofs == 0) {
>>> + valid = 1;
>>> + nid_ofs = 1;
>>> + }
>>> +
>>> + for (; nid_ofs < NAT_ENTRY_PER_BLOCK; nid_ofs++) {
>>> + if (!test_bit_le(nid_ofs,
>>> + nm_i->free_nid_bitmap[nat_ofs]))
>>> + valid++;
>>> + }
>>> +
>>> + if (valid == 0) {
>>> + __set_bit_le(nat_ofs, nm_i->empty_nat_bits);
>>> + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
>>> + continue;
>>> + }
>>> +
>>> + __clear_bit_le(nat_ofs, nm_i->empty_nat_bits);
>>> + if (valid == NAT_ENTRY_PER_BLOCK)
>>> + __set_bit_le(nat_ofs, nm_i->full_nat_bits);
>>> + else
>>> + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
>>> + }
>>> +
>>> + up_read(&nm_i->nat_tree_lock);
>>> +}
>>> +
>>> static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
>>> struct nat_entry_set *set, struct cp_control *cpc)
>>> {
>>> @@ -2738,7 +2793,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
>>> * #1, flush nat entries to journal in current hot data summary block.
>>> * #2, flush nat entries to nat page.
>>> */
>>> - if (enabled_nat_bits(sbi, cpc) ||
>>> + if ((cpc->reason & CP_UMOUNT) ||
>>> !__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
>>> to_journal = false;
>>>
>>> @@ -2813,7 +2868,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>> int err = 0;
>>>
>>> /* during unmount, let's flush nat_bits before checking dirty_nat_cnt */
>>> - if (enabled_nat_bits(sbi, cpc)) {
>>> + if (cpc->reason & CP_UMOUNT) {
>>> down_write(&nm_i->nat_tree_lock);
>>> remove_nats_in_journal(sbi);
>>> up_write(&nm_i->nat_tree_lock);
>>> @@ -2829,7 +2884,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>> * entries, remove all entries from journal and merge them
>>> * into nat entry set.
>>> */
>>> - if (enabled_nat_bits(sbi, cpc) ||
>>> + if ((cpc->reason & CP_UMOUNT) ||
>>> !__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
>>> remove_nats_in_journal(sbi);
>>>
>>> @@ -2864,15 +2919,18 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
>>> __u64 cp_ver = cur_cp_version(ckpt);
>>> block_t nat_bits_addr;
>>>
>>> - if (!enabled_nat_bits(sbi, NULL))
>>> - return 0;
>>> -
>>> nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
>>> nm_i->nat_bits = f2fs_kzalloc(sbi,
>>> nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL);
>>> if (!nm_i->nat_bits)
>>> return -ENOMEM;
>>>
>>> + nm_i->full_nat_bits = nm_i->nat_bits + 8;
>>> + nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
>>> +
>>> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
>>> + return 0;
>>> +
>>> nat_bits_addr = __start_cp_addr(sbi) + sbi->blocks_per_seg -
>>> nm_i->nat_bits_blocks;
>>> for (i = 0; i < nm_i->nat_bits_blocks; i++) {
>>> @@ -2889,13 +2947,13 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
>>>
>>> cp_ver |= (cur_cp_crc(ckpt) << 32);
>>> if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits) {
>>> - disable_nat_bits(sbi, true);
>>> + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>> + f2fs_msg(sbi->sb, KERN_NOTICE,
>>> + "Disable nat_bits due to incorrect cp_ver (%llu, %llu)",
>>> + cp_ver, le64_to_cpu(*(__le64 *)nm_i->nat_bits));
>>> return 0;
>>> }
>>>
>>> - nm_i->full_nat_bits = nm_i->nat_bits + 8;
>>> - nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
>>> -
>>> f2fs_msg(sbi->sb, KERN_NOTICE, "Found nat_bits in checkpoint");
>>> return 0;
>>> }
>>> @@ -2906,7 +2964,7 @@ static inline void load_free_nid_bitmap(struct f2fs_sb_info *sbi)
>>> unsigned int i = 0;
>>> nid_t nid, last_nid;
>>>
>>> - if (!enabled_nat_bits(sbi, NULL))
>>> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
>>> return;
>>>
>>> for (i = 0; i < nm_i->nat_blocks; i++) {
>>>
>
> .
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [f2fs-dev] [PATCH v3] f2fs: rebuild nat_bits during umount
2019-03-04 6:27 ` Chao Yu
@ 2021-08-20 10:56 ` Chao Yu
0 siblings, 0 replies; 5+ messages in thread
From: Chao Yu @ 2021-08-20 10:56 UTC (permalink / raw)
To: Jaegeuk Kim; +Cc: linux-kernel, linux-f2fs-devel
On 2019/3/4 14:27, Chao Yu wrote:
> On 2019/3/2 1:55, Jaegeuk Kim wrote:
>> On 02/28, Chao Yu wrote:
>>> Ping,
>>>
>>> Could you please try this new version?
>>
>> It's in the queue, and I'll test this after the next pull request.
>
> Okay. :)
I picked up this ancient patch from forgotten corner of my dev tree. :)
Thanks,
>
> Thanks,
>
>>
>>>
>>> On 2019/2/17 6:26, Chao Yu wrote:
>>>> From: Chao Yu <yuchao0@huawei.com>
>>>>
>>>> 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 <yuchao0@huawei.com>
>>>> ---
>>>> v3:
>>>> - fix to remove nat journal during umount.
>>>> fs/f2fs/checkpoint.c | 23 +++++++++----
>>>> fs/f2fs/f2fs.h | 29 ++--------------
>>>> fs/f2fs/node.c | 82 +++++++++++++++++++++++++++++++++++++-------
>>>> 3 files changed, 89 insertions(+), 45 deletions(-)
>>>>
>>>> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
>>>> index 10a3ada28715..b4c9de4e6eb0 100644
>>>> --- a/fs/f2fs/checkpoint.c
>>>> +++ b/fs/f2fs/checkpoint.c
>>>> @@ -1225,12 +1225,22 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>>> struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
>>>> unsigned long flags;
>>>>
>>>> - spin_lock_irqsave(&sbi->cp_lock, flags);
>>>> + if (cpc->reason & CP_UMOUNT) {
>>>> + if (le32_to_cpu(ckpt->cp_pack_total_block_count) >
>>>> + sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks) {
>>>> + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>>> + f2fs_msg(sbi->sb, KERN_NOTICE,
>>>> + "Disable nat_bits due to no space");
>>>> + } else if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG) &&
>>>> + f2fs_nat_bitmap_enabled(sbi)) {
>>>> + f2fs_enable_nat_bits(sbi);
>>>> + set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>>> + f2fs_msg(sbi->sb, KERN_NOTICE,
>>>> + "Rebuild and enable nat_bits");
>>>> + }
>>>> + }
>>>>
>>>> - 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);
>>>> + spin_lock_irqsave(&sbi->cp_lock, flags);
>>>>
>>>> if (cpc->reason & CP_TRIMMED)
>>>> __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
>>>> @@ -1395,7 +1405,8 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>>> start_blk = __start_cp_next_addr(sbi);
>>>>
>>>> /* write nat bits */
>>>> - if (enabled_nat_bits(sbi, cpc)) {
>>>> + if ((cpc->reason & CP_UMOUNT) &&
>>>> + is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG)) {
>>>> __u64 cp_ver = cur_cp_version(ckpt);
>>>> block_t blk;
>>>>
>>>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
>>>> index c0d30810ef8a..a543354fc6bf 100644
>>>> --- a/fs/f2fs/f2fs.h
>>>> +++ b/fs/f2fs/f2fs.h
>>>> @@ -1615,33 +1615,6 @@ static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
>>>> spin_unlock_irqrestore(&sbi->cp_lock, flags);
>>>> }
>>>>
>>>> -static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
>>>> -{
>>>> - unsigned long flags;
>>>> -
>>>> - /*
>>>> - * In order to re-enable nat_bits we need to call fsck.f2fs by
>>>> - * set_sbi_flag(sbi, SBI_NEED_FSCK). But it may give huge cost,
>>>> - * so let's rely on regular fsck or unclean shutdown.
>>>> - */
>>>> -
>>>> - if (lock)
>>>> - spin_lock_irqsave(&sbi->cp_lock, flags);
>>>> - __clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
>>>> - kvfree(NM_I(sbi)->nat_bits);
>>>> - NM_I(sbi)->nat_bits = NULL;
>>>> - if (lock)
>>>> - spin_unlock_irqrestore(&sbi->cp_lock, flags);
>>>> -}
>>>> -
>>>> -static inline bool enabled_nat_bits(struct f2fs_sb_info *sbi,
>>>> - struct cp_control *cpc)
>>>> -{
>>>> - bool set = is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>>> -
>>>> - return (cpc) ? (cpc->reason & CP_UMOUNT) && set : set;
>>>> -}
>>>> -
>>>> static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
>>>> {
>>>> down_read(&sbi->cp_rwsem);
>>>> @@ -2970,6 +2943,7 @@ int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from);
>>>> int f2fs_truncate_xattr_node(struct inode *inode);
>>>> int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi,
>>>> unsigned int seq_id);
>>>> +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi);
>>>> int f2fs_remove_inode_page(struct inode *inode);
>>>> struct page *f2fs_new_inode_page(struct inode *inode);
>>>> struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
>>>> @@ -2993,6 +2967,7 @@ int f2fs_recover_xattr_data(struct inode *inode, struct page *page);
>>>> int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
>>>> int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
>>>> unsigned int segno, struct f2fs_summary_block *sum);
>>>> +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi);
>>>> int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
>>>> int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
>>>> void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi);
>>>> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
>>>> index f6ff84e29749..e364c6a84f3c 100644
>>>> --- a/fs/f2fs/node.c
>>>> +++ b/fs/f2fs/node.c
>>>> @@ -2038,6 +2038,24 @@ static void __move_free_nid(struct f2fs_sb_info *sbi, struct free_nid *i,
>>>> }
>>>> }
>>>>
>>>> +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi)
>>>> +{
>>>> + struct f2fs_nm_info *nm_i = NM_I(sbi);
>>>> + unsigned int i;
>>>> + bool ret = true;
>>>> +
>>>> + down_read(&nm_i->nat_tree_lock);
>>>> + for (i = 0; i < nm_i->nat_blocks; i++) {
>>>> + if (!test_bit_le(i, nm_i->nat_block_bitmap)) {
>>>> + ret = false;
>>>> + break;
>>>> + }
>>>> + }
>>>> + up_read(&nm_i->nat_tree_lock);
>>>> +
>>>> + return ret;
>>>> +}
>>>> +
>>>> static void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid,
>>>> bool set, bool build)
>>>> {
>>>> @@ -2698,7 +2716,7 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
>>>> int valid = 0;
>>>> int i = 0;
>>>>
>>>> - if (!enabled_nat_bits(sbi, NULL))
>>>> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
>>>> return;
>>>>
>>>> if (nat_index == 0) {
>>>> @@ -2722,6 +2740,43 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
>>>> __clear_bit_le(nat_index, nm_i->full_nat_bits);
>>>> }
>>>>
>>>> +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi)
>>>> +{
>>>> + struct f2fs_nm_info *nm_i = NM_I(sbi);
>>>> + int nat_ofs;
>>>> +
>>>> + down_read(&nm_i->nat_tree_lock);
>>>> +
>>>> + for (nat_ofs = 0; nat_ofs < nm_i->nat_blocks; nat_ofs++) {
>>>> + int valid = 0, nid_ofs = 0;
>>>> +
>>>> + if (nat_ofs == 0) {
>>>> + valid = 1;
>>>> + nid_ofs = 1;
>>>> + }
>>>> +
>>>> + for (; nid_ofs < NAT_ENTRY_PER_BLOCK; nid_ofs++) {
>>>> + if (!test_bit_le(nid_ofs,
>>>> + nm_i->free_nid_bitmap[nat_ofs]))
>>>> + valid++;
>>>> + }
>>>> +
>>>> + if (valid == 0) {
>>>> + __set_bit_le(nat_ofs, nm_i->empty_nat_bits);
>>>> + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
>>>> + continue;
>>>> + }
>>>> +
>>>> + __clear_bit_le(nat_ofs, nm_i->empty_nat_bits);
>>>> + if (valid == NAT_ENTRY_PER_BLOCK)
>>>> + __set_bit_le(nat_ofs, nm_i->full_nat_bits);
>>>> + else
>>>> + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
>>>> + }
>>>> +
>>>> + up_read(&nm_i->nat_tree_lock);
>>>> +}
>>>> +
>>>> static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
>>>> struct nat_entry_set *set, struct cp_control *cpc)
>>>> {
>>>> @@ -2738,7 +2793,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
>>>> * #1, flush nat entries to journal in current hot data summary block.
>>>> * #2, flush nat entries to nat page.
>>>> */
>>>> - if (enabled_nat_bits(sbi, cpc) ||
>>>> + if ((cpc->reason & CP_UMOUNT) ||
>>>> !__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
>>>> to_journal = false;
>>>>
>>>> @@ -2813,7 +2868,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>>> int err = 0;
>>>>
>>>> /* during unmount, let's flush nat_bits before checking dirty_nat_cnt */
>>>> - if (enabled_nat_bits(sbi, cpc)) {
>>>> + if (cpc->reason & CP_UMOUNT) {
>>>> down_write(&nm_i->nat_tree_lock);
>>>> remove_nats_in_journal(sbi);
>>>> up_write(&nm_i->nat_tree_lock);
>>>> @@ -2829,7 +2884,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>>> * entries, remove all entries from journal and merge them
>>>> * into nat entry set.
>>>> */
>>>> - if (enabled_nat_bits(sbi, cpc) ||
>>>> + if ((cpc->reason & CP_UMOUNT) ||
>>>> !__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
>>>> remove_nats_in_journal(sbi);
>>>>
>>>> @@ -2864,15 +2919,18 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
>>>> __u64 cp_ver = cur_cp_version(ckpt);
>>>> block_t nat_bits_addr;
>>>>
>>>> - if (!enabled_nat_bits(sbi, NULL))
>>>> - return 0;
>>>> -
>>>> nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
>>>> nm_i->nat_bits = f2fs_kzalloc(sbi,
>>>> nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL);
>>>> if (!nm_i->nat_bits)
>>>> return -ENOMEM;
>>>>
>>>> + nm_i->full_nat_bits = nm_i->nat_bits + 8;
>>>> + nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
>>>> +
>>>> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
>>>> + return 0;
>>>> +
>>>> nat_bits_addr = __start_cp_addr(sbi) + sbi->blocks_per_seg -
>>>> nm_i->nat_bits_blocks;
>>>> for (i = 0; i < nm_i->nat_bits_blocks; i++) {
>>>> @@ -2889,13 +2947,13 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
>>>>
>>>> cp_ver |= (cur_cp_crc(ckpt) << 32);
>>>> if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits) {
>>>> - disable_nat_bits(sbi, true);
>>>> + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>>> + f2fs_msg(sbi->sb, KERN_NOTICE,
>>>> + "Disable nat_bits due to incorrect cp_ver (%llu, %llu)",
>>>> + cp_ver, le64_to_cpu(*(__le64 *)nm_i->nat_bits));
>>>> return 0;
>>>> }
>>>>
>>>> - nm_i->full_nat_bits = nm_i->nat_bits + 8;
>>>> - nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
>>>> -
>>>> f2fs_msg(sbi->sb, KERN_NOTICE, "Found nat_bits in checkpoint");
>>>> return 0;
>>>> }
>>>> @@ -2906,7 +2964,7 @@ static inline void load_free_nid_bitmap(struct f2fs_sb_info *sbi)
>>>> unsigned int i = 0;
>>>> nid_t nid, last_nid;
>>>>
>>>> - if (!enabled_nat_bits(sbi, NULL))
>>>> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
>>>> return;
>>>>
>>>> for (i = 0; i < nm_i->nat_blocks; i++) {
>>>>
>>
>> .
>>
>
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-08-20 10:57 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-02-16 22:26 [PATCH v3] f2fs: rebuild nat_bits during umount Chao Yu
2019-02-28 3:49 ` Chao Yu
2019-03-01 17:55 ` Jaegeuk Kim
2019-03-04 6:27 ` Chao Yu
2021-08-20 10:56 ` [f2fs-dev] " Chao Yu
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