[PATCH] f2fs: relocate f2fs_sanity_check_ckpt() and make it static

[PATCH] f2fs: relocate f2fs_sanity_check_ckpt() and make it static

[Chao Yu]

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
 fs/f2fs/checkpoint.c | 93 +++++++++++++++++++++++++++++++++++++++++++-
 fs/f2fs/f2fs.h       |  1 -
 fs/f2fs/super.c      | 91 -------------------------------------------
 3 files changed, 92 insertions(+), 93 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index e010fecce097..7d16cb36be47 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -833,6 +833,97 @@ static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
 	return NULL;
 }
 
+static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
+{
+	unsigned int total, fsmeta;
+	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
+	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+	unsigned int ovp_segments, reserved_segments;
+	unsigned int main_segs, blocks_per_seg;
+	unsigned int sit_segs, nat_segs;
+	unsigned int sit_bitmap_size, nat_bitmap_size;
+	unsigned int log_blocks_per_seg;
+	unsigned int user_block_count;
+	unsigned int segment_count_main;
+	unsigned int cp_pack_start_sum, cp_blkaddr, cp_payload;
+	int i;
+
+	total = le32_to_cpu(raw_super->segment_count);
+	fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
+	sit_segs = le32_to_cpu(raw_super->segment_count_sit);
+	fsmeta += sit_segs;
+	nat_segs = le32_to_cpu(raw_super->segment_count_nat);
+	fsmeta += nat_segs;
+	fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
+	fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
+
+	if (unlikely(fsmeta >= total))
+		return 1;
+
+	ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
+	reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
+
+	if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
+			ovp_segments == 0 || reserved_segments == 0)) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+			"Wrong layout: check mkfs.f2fs version");
+		return 1;
+	}
+
+	user_block_count = le32_to_cpu(ckpt->user_block_count);
+	segment_count_main = le32_to_cpu(raw_super->segment_count_main);
+	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
+	if (!user_block_count || user_block_count >=
+			segment_count_main << log_blocks_per_seg) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+			"Wrong user_block_count: %u", user_block_count);
+		return 1;
+	}
+
+	main_segs = le32_to_cpu(raw_super->segment_count_main);
+	blocks_per_seg = sbi->blocks_per_seg;
+
+	for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
+		if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
+			le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
+			return 1;
+	}
+	for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
+		if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
+			le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
+			return 1;
+	}
+
+	sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
+	nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
+
+	if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
+		nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+			"Wrong bitmap size: sit: %u, nat:%u",
+			sit_bitmap_size, nat_bitmap_size);
+		return 1;
+	}
+
+	cp_pack_start_sum = __start_sum_addr(sbi);
+	cp_blkaddr = __start_cp_addr(sbi);
+	cp_payload = __cp_payload(sbi);
+	if (cp_pack_start_sum < cp_payload + 1 ||
+		cp_pack_start_sum > blocks_per_seg - 1 -
+			NR_CURSEG_TYPE) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+			"Wrong cp_pack_start_sum: %u",
+			cp_pack_start_sum);
+		return 1;
+	}
+
+	if (unlikely(f2fs_cp_error(sbi))) {
+		f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
+		return 1;
+	}
+	return 0;
+}
+
 int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_checkpoint *cp_block;
@@ -883,7 +974,7 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
 		sbi->cur_cp_pack = 2;
 
 	/* Sanity checking of checkpoint */
-	if (f2fs_sanity_check_ckpt(sbi))
+	if (sanity_check_ckpt(sbi))
 		goto free_fail_no_cp;
 
 	if (cp_blks <= 1)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index adee43288593..fa5d0ebf8998 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -2817,7 +2817,6 @@ int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
 int f2fs_sync_fs(struct super_block *sb, int sync);
 extern __printf(3, 4)
 void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...);
-int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi);
 
 /*
  * hash.c
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 622acaab46b2..0eb5c9b659f7 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -2295,97 +2295,6 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
 	return 0;
 }
 
-int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
-{
-	unsigned int total, fsmeta;
-	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
-	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
-	unsigned int ovp_segments, reserved_segments;
-	unsigned int main_segs, blocks_per_seg;
-	unsigned int sit_segs, nat_segs;
-	unsigned int sit_bitmap_size, nat_bitmap_size;
-	unsigned int log_blocks_per_seg;
-	unsigned int user_block_count;
-	unsigned int segment_count_main;
-	unsigned int cp_pack_start_sum, cp_blkaddr, cp_payload;
-	int i;
-
-	total = le32_to_cpu(raw_super->segment_count);
-	fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
-	sit_segs = le32_to_cpu(raw_super->segment_count_sit);
-	fsmeta += sit_segs;
-	nat_segs = le32_to_cpu(raw_super->segment_count_nat);
-	fsmeta += nat_segs;
-	fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
-	fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
-
-	if (unlikely(fsmeta >= total))
-		return 1;
-
-	ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
-	reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
-
-	if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
-			ovp_segments == 0 || reserved_segments == 0)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong layout: check mkfs.f2fs version");
-		return 1;
-	}
-
-	user_block_count = le32_to_cpu(ckpt->user_block_count);
-	segment_count_main = le32_to_cpu(raw_super->segment_count_main);
-	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
-	if (!user_block_count || user_block_count >=
-			segment_count_main << log_blocks_per_seg) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong user_block_count: %u", user_block_count);
-		return 1;
-	}
-
-	main_segs = le32_to_cpu(raw_super->segment_count_main);
-	blocks_per_seg = sbi->blocks_per_seg;
-
-	for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
-		if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
-			le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
-			return 1;
-	}
-	for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
-		if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
-			le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
-			return 1;
-	}
-
-	sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
-	nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
-
-	if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
-		nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong bitmap size: sit: %u, nat:%u",
-			sit_bitmap_size, nat_bitmap_size);
-		return 1;
-	}
-
-	cp_pack_start_sum = __start_sum_addr(sbi);
-	cp_blkaddr = __start_cp_addr(sbi);
-	cp_payload = __cp_payload(sbi);
-	if (cp_pack_start_sum < cp_payload + 1 ||
-		cp_pack_start_sum > blocks_per_seg - 1 -
-			NR_CURSEG_TYPE) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong cp_pack_start_sum: %u",
-			cp_pack_start_sum);
-		return 1;
-	}
-
-	if (unlikely(f2fs_cp_error(sbi))) {
-		f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
-		return 1;
-	}
-	return 0;
-}
-
 static void init_sb_info(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_super_block *raw_super = sbi->raw_super;
-- 
2.18.0.rc1

Re: [PATCH] f2fs: relocate f2fs_sanity_check_ckpt() and make it static

[Jaegeuk Kim]

Hi Chao,

I don't see any reason to do this at all.

Thanks,

On 07/26, Chao Yu wrote:
> Signed-off-by: Chao Yu <yuchao0@huawei.com>
> ---
>  fs/f2fs/checkpoint.c | 93 +++++++++++++++++++++++++++++++++++++++++++-
>  fs/f2fs/f2fs.h       |  1 -
>  fs/f2fs/super.c      | 91 -------------------------------------------
>  3 files changed, 92 insertions(+), 93 deletions(-)
> 
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index e010fecce097..7d16cb36be47 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -833,6 +833,97 @@ static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
>  	return NULL;
>  }
>  
> +static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
> +{
> +	unsigned int total, fsmeta;
> +	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
> +	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
> +	unsigned int ovp_segments, reserved_segments;
> +	unsigned int main_segs, blocks_per_seg;
> +	unsigned int sit_segs, nat_segs;
> +	unsigned int sit_bitmap_size, nat_bitmap_size;
> +	unsigned int log_blocks_per_seg;
> +	unsigned int user_block_count;
> +	unsigned int segment_count_main;
> +	unsigned int cp_pack_start_sum, cp_blkaddr, cp_payload;
> +	int i;
> +
> +	total = le32_to_cpu(raw_super->segment_count);
> +	fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
> +	sit_segs = le32_to_cpu(raw_super->segment_count_sit);
> +	fsmeta += sit_segs;
> +	nat_segs = le32_to_cpu(raw_super->segment_count_nat);
> +	fsmeta += nat_segs;
> +	fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
> +	fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
> +
> +	if (unlikely(fsmeta >= total))
> +		return 1;
> +
> +	ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
> +	reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
> +
> +	if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
> +			ovp_segments == 0 || reserved_segments == 0)) {
> +		f2fs_msg(sbi->sb, KERN_ERR,
> +			"Wrong layout: check mkfs.f2fs version");
> +		return 1;
> +	}
> +
> +	user_block_count = le32_to_cpu(ckpt->user_block_count);
> +	segment_count_main = le32_to_cpu(raw_super->segment_count_main);
> +	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
> +	if (!user_block_count || user_block_count >=
> +			segment_count_main << log_blocks_per_seg) {
> +		f2fs_msg(sbi->sb, KERN_ERR,
> +			"Wrong user_block_count: %u", user_block_count);
> +		return 1;
> +	}
> +
> +	main_segs = le32_to_cpu(raw_super->segment_count_main);
> +	blocks_per_seg = sbi->blocks_per_seg;
> +
> +	for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
> +		if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
> +			le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
> +			return 1;
> +	}
> +	for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
> +		if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
> +			le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
> +			return 1;
> +	}
> +
> +	sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
> +	nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
> +
> +	if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
> +		nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
> +		f2fs_msg(sbi->sb, KERN_ERR,
> +			"Wrong bitmap size: sit: %u, nat:%u",
> +			sit_bitmap_size, nat_bitmap_size);
> +		return 1;
> +	}
> +
> +	cp_pack_start_sum = __start_sum_addr(sbi);
> +	cp_blkaddr = __start_cp_addr(sbi);
> +	cp_payload = __cp_payload(sbi);
> +	if (cp_pack_start_sum < cp_payload + 1 ||
> +		cp_pack_start_sum > blocks_per_seg - 1 -
> +			NR_CURSEG_TYPE) {
> +		f2fs_msg(sbi->sb, KERN_ERR,
> +			"Wrong cp_pack_start_sum: %u",
> +			cp_pack_start_sum);
> +		return 1;
> +	}
> +
> +	if (unlikely(f2fs_cp_error(sbi))) {
> +		f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
> +		return 1;
> +	}
> +	return 0;
> +}
> +
>  int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
>  {
>  	struct f2fs_checkpoint *cp_block;
> @@ -883,7 +974,7 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
>  		sbi->cur_cp_pack = 2;
>  
>  	/* Sanity checking of checkpoint */
> -	if (f2fs_sanity_check_ckpt(sbi))
> +	if (sanity_check_ckpt(sbi))
>  		goto free_fail_no_cp;
>  
>  	if (cp_blks <= 1)
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index adee43288593..fa5d0ebf8998 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -2817,7 +2817,6 @@ int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
>  int f2fs_sync_fs(struct super_block *sb, int sync);
>  extern __printf(3, 4)
>  void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...);
> -int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi);
>  
>  /*
>   * hash.c
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index 622acaab46b2..0eb5c9b659f7 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -2295,97 +2295,6 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
>  	return 0;
>  }
>  
> -int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
> -{
> -	unsigned int total, fsmeta;
> -	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
> -	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
> -	unsigned int ovp_segments, reserved_segments;
> -	unsigned int main_segs, blocks_per_seg;
> -	unsigned int sit_segs, nat_segs;
> -	unsigned int sit_bitmap_size, nat_bitmap_size;
> -	unsigned int log_blocks_per_seg;
> -	unsigned int user_block_count;
> -	unsigned int segment_count_main;
> -	unsigned int cp_pack_start_sum, cp_blkaddr, cp_payload;
> -	int i;
> -
> -	total = le32_to_cpu(raw_super->segment_count);
> -	fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
> -	sit_segs = le32_to_cpu(raw_super->segment_count_sit);
> -	fsmeta += sit_segs;
> -	nat_segs = le32_to_cpu(raw_super->segment_count_nat);
> -	fsmeta += nat_segs;
> -	fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
> -	fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
> -
> -	if (unlikely(fsmeta >= total))
> -		return 1;
> -
> -	ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
> -	reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
> -
> -	if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
> -			ovp_segments == 0 || reserved_segments == 0)) {
> -		f2fs_msg(sbi->sb, KERN_ERR,
> -			"Wrong layout: check mkfs.f2fs version");
> -		return 1;
> -	}
> -
> -	user_block_count = le32_to_cpu(ckpt->user_block_count);
> -	segment_count_main = le32_to_cpu(raw_super->segment_count_main);
> -	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
> -	if (!user_block_count || user_block_count >=
> -			segment_count_main << log_blocks_per_seg) {
> -		f2fs_msg(sbi->sb, KERN_ERR,
> -			"Wrong user_block_count: %u", user_block_count);
> -		return 1;
> -	}
> -
> -	main_segs = le32_to_cpu(raw_super->segment_count_main);
> -	blocks_per_seg = sbi->blocks_per_seg;
> -
> -	for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
> -		if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
> -			le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
> -			return 1;
> -	}
> -	for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
> -		if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
> -			le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
> -			return 1;
> -	}
> -
> -	sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
> -	nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
> -
> -	if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
> -		nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
> -		f2fs_msg(sbi->sb, KERN_ERR,
> -			"Wrong bitmap size: sit: %u, nat:%u",
> -			sit_bitmap_size, nat_bitmap_size);
> -		return 1;
> -	}
> -
> -	cp_pack_start_sum = __start_sum_addr(sbi);
> -	cp_blkaddr = __start_cp_addr(sbi);
> -	cp_payload = __cp_payload(sbi);
> -	if (cp_pack_start_sum < cp_payload + 1 ||
> -		cp_pack_start_sum > blocks_per_seg - 1 -
> -			NR_CURSEG_TYPE) {
> -		f2fs_msg(sbi->sb, KERN_ERR,
> -			"Wrong cp_pack_start_sum: %u",
> -			cp_pack_start_sum);
> -		return 1;
> -	}
> -
> -	if (unlikely(f2fs_cp_error(sbi))) {
> -		f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
> -		return 1;
> -	}
> -	return 0;
> -}
> -
>  static void init_sb_info(struct f2fs_sb_info *sbi)
>  {
>  	struct f2fs_super_block *raw_super = sbi->raw_super;
> -- 
> 2.18.0.rc1

Re: [PATCH] f2fs: relocate f2fs_sanity_check_ckpt() and make it static

[Chao Yu]

Hi Jaegeuk,

On 2018/7/27 18:25, Jaegeuk Kim wrote:
> Hi Chao,
> 
> I don't see any reason to do this at all.

Hmm.. f2fs_sanity_check_ckpt() is not used in super.c and there-in code logic is
not related to super.c too, instead, it is all related to checkpoint.c.

So I just want to unify maintaining checkpoint related functions, it may make
code more clean.

Anyway, it's trivial cleanup, please ignore this patch if you don't want to do
such relocation.

Thanks,

> 
> Thanks,
> 
> On 07/26, Chao Yu wrote:
>> Signed-off-by: Chao Yu <yuchao0@huawei.com>
>> ---
>>  fs/f2fs/checkpoint.c | 93 +++++++++++++++++++++++++++++++++++++++++++-
>>  fs/f2fs/f2fs.h       |  1 -
>>  fs/f2fs/super.c      | 91 -------------------------------------------
>>  3 files changed, 92 insertions(+), 93 deletions(-)
>>
>> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
>> index e010fecce097..7d16cb36be47 100644
>> --- a/fs/f2fs/checkpoint.c
>> +++ b/fs/f2fs/checkpoint.c
>> @@ -833,6 +833,97 @@ static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
>>  	return NULL;
>>  }
>>  
>> +static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
>> +{
>> +	unsigned int total, fsmeta;
>> +	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
>> +	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
>> +	unsigned int ovp_segments, reserved_segments;
>> +	unsigned int main_segs, blocks_per_seg;
>> +	unsigned int sit_segs, nat_segs;
>> +	unsigned int sit_bitmap_size, nat_bitmap_size;
>> +	unsigned int log_blocks_per_seg;
>> +	unsigned int user_block_count;
>> +	unsigned int segment_count_main;
>> +	unsigned int cp_pack_start_sum, cp_blkaddr, cp_payload;
>> +	int i;
>> +
>> +	total = le32_to_cpu(raw_super->segment_count);
>> +	fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
>> +	sit_segs = le32_to_cpu(raw_super->segment_count_sit);
>> +	fsmeta += sit_segs;
>> +	nat_segs = le32_to_cpu(raw_super->segment_count_nat);
>> +	fsmeta += nat_segs;
>> +	fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
>> +	fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
>> +
>> +	if (unlikely(fsmeta >= total))
>> +		return 1;
>> +
>> +	ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
>> +	reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
>> +
>> +	if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
>> +			ovp_segments == 0 || reserved_segments == 0)) {
>> +		f2fs_msg(sbi->sb, KERN_ERR,
>> +			"Wrong layout: check mkfs.f2fs version");
>> +		return 1;
>> +	}
>> +
>> +	user_block_count = le32_to_cpu(ckpt->user_block_count);
>> +	segment_count_main = le32_to_cpu(raw_super->segment_count_main);
>> +	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
>> +	if (!user_block_count || user_block_count >=
>> +			segment_count_main << log_blocks_per_seg) {
>> +		f2fs_msg(sbi->sb, KERN_ERR,
>> +			"Wrong user_block_count: %u", user_block_count);
>> +		return 1;
>> +	}
>> +
>> +	main_segs = le32_to_cpu(raw_super->segment_count_main);
>> +	blocks_per_seg = sbi->blocks_per_seg;
>> +
>> +	for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
>> +		if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
>> +			le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
>> +			return 1;
>> +	}
>> +	for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
>> +		if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
>> +			le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
>> +			return 1;
>> +	}
>> +
>> +	sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
>> +	nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
>> +
>> +	if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
>> +		nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
>> +		f2fs_msg(sbi->sb, KERN_ERR,
>> +			"Wrong bitmap size: sit: %u, nat:%u",
>> +			sit_bitmap_size, nat_bitmap_size);
>> +		return 1;
>> +	}
>> +
>> +	cp_pack_start_sum = __start_sum_addr(sbi);
>> +	cp_blkaddr = __start_cp_addr(sbi);
>> +	cp_payload = __cp_payload(sbi);
>> +	if (cp_pack_start_sum < cp_payload + 1 ||
>> +		cp_pack_start_sum > blocks_per_seg - 1 -
>> +			NR_CURSEG_TYPE) {
>> +		f2fs_msg(sbi->sb, KERN_ERR,
>> +			"Wrong cp_pack_start_sum: %u",
>> +			cp_pack_start_sum);
>> +		return 1;
>> +	}
>> +
>> +	if (unlikely(f2fs_cp_error(sbi))) {
>> +		f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
>> +		return 1;
>> +	}
>> +	return 0;
>> +}
>> +
>>  int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
>>  {
>>  	struct f2fs_checkpoint *cp_block;
>> @@ -883,7 +974,7 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
>>  		sbi->cur_cp_pack = 2;
>>  
>>  	/* Sanity checking of checkpoint */
>> -	if (f2fs_sanity_check_ckpt(sbi))
>> +	if (sanity_check_ckpt(sbi))
>>  		goto free_fail_no_cp;
>>  
>>  	if (cp_blks <= 1)
>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
>> index adee43288593..fa5d0ebf8998 100644
>> --- a/fs/f2fs/f2fs.h
>> +++ b/fs/f2fs/f2fs.h
>> @@ -2817,7 +2817,6 @@ int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
>>  int f2fs_sync_fs(struct super_block *sb, int sync);
>>  extern __printf(3, 4)
>>  void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...);
>> -int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi);
>>  
>>  /*
>>   * hash.c
>> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
>> index 622acaab46b2..0eb5c9b659f7 100644
>> --- a/fs/f2fs/super.c
>> +++ b/fs/f2fs/super.c
>> @@ -2295,97 +2295,6 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
>>  	return 0;
>>  }
>>  
>> -int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
>> -{
>> -	unsigned int total, fsmeta;
>> -	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
>> -	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
>> -	unsigned int ovp_segments, reserved_segments;
>> -	unsigned int main_segs, blocks_per_seg;
>> -	unsigned int sit_segs, nat_segs;
>> -	unsigned int sit_bitmap_size, nat_bitmap_size;
>> -	unsigned int log_blocks_per_seg;
>> -	unsigned int user_block_count;
>> -	unsigned int segment_count_main;
>> -	unsigned int cp_pack_start_sum, cp_blkaddr, cp_payload;
>> -	int i;
>> -
>> -	total = le32_to_cpu(raw_super->segment_count);
>> -	fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
>> -	sit_segs = le32_to_cpu(raw_super->segment_count_sit);
>> -	fsmeta += sit_segs;
>> -	nat_segs = le32_to_cpu(raw_super->segment_count_nat);
>> -	fsmeta += nat_segs;
>> -	fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
>> -	fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
>> -
>> -	if (unlikely(fsmeta >= total))
>> -		return 1;
>> -
>> -	ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
>> -	reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
>> -
>> -	if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
>> -			ovp_segments == 0 || reserved_segments == 0)) {
>> -		f2fs_msg(sbi->sb, KERN_ERR,
>> -			"Wrong layout: check mkfs.f2fs version");
>> -		return 1;
>> -	}
>> -
>> -	user_block_count = le32_to_cpu(ckpt->user_block_count);
>> -	segment_count_main = le32_to_cpu(raw_super->segment_count_main);
>> -	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
>> -	if (!user_block_count || user_block_count >=
>> -			segment_count_main << log_blocks_per_seg) {
>> -		f2fs_msg(sbi->sb, KERN_ERR,
>> -			"Wrong user_block_count: %u", user_block_count);
>> -		return 1;
>> -	}
>> -
>> -	main_segs = le32_to_cpu(raw_super->segment_count_main);
>> -	blocks_per_seg = sbi->blocks_per_seg;
>> -
>> -	for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
>> -		if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
>> -			le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
>> -			return 1;
>> -	}
>> -	for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
>> -		if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
>> -			le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
>> -			return 1;
>> -	}
>> -
>> -	sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
>> -	nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
>> -
>> -	if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
>> -		nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
>> -		f2fs_msg(sbi->sb, KERN_ERR,
>> -			"Wrong bitmap size: sit: %u, nat:%u",
>> -			sit_bitmap_size, nat_bitmap_size);
>> -		return 1;
>> -	}
>> -
>> -	cp_pack_start_sum = __start_sum_addr(sbi);
>> -	cp_blkaddr = __start_cp_addr(sbi);
>> -	cp_payload = __cp_payload(sbi);
>> -	if (cp_pack_start_sum < cp_payload + 1 ||
>> -		cp_pack_start_sum > blocks_per_seg - 1 -
>> -			NR_CURSEG_TYPE) {
>> -		f2fs_msg(sbi->sb, KERN_ERR,
>> -			"Wrong cp_pack_start_sum: %u",
>> -			cp_pack_start_sum);
>> -		return 1;
>> -	}
>> -
>> -	if (unlikely(f2fs_cp_error(sbi))) {
>> -		f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
>> -		return 1;
>> -	}
>> -	return 0;
>> -}
>> -
>>  static void init_sb_info(struct f2fs_sb_info *sbi)
>>  {
>>  	struct f2fs_super_block *raw_super = sbi->raw_super;
>> -- 
>> 2.18.0.rc1