[PATCH 1/2] f2fs: allow to recover node blocks given updated checkpoint

[PATCH 1/2] f2fs: allow to recover node blocks given updated checkpoint

[Jaegeuk Kim]

If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
forward recovery. Let's relax the condition to recover them.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/node.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 0ee3e5ff49a3..15280eeb24ea 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -305,10 +305,11 @@ static inline bool is_recoverable_dnode(struct page *page)
 	struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
 	__u64 cp_ver = cur_cp_version(ckpt);
 
-	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
+	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) {
 		cp_ver |= (cur_cp_crc(ckpt) << 32);
-
-	return cp_ver == cpver_of_node(page);
+		return cp_ver == cpver_of_node(page);
+	}
+	return (cp_ver << 32) == (cpver_of_node(page) << 32);
 }
 
 /*
-- 
2.15.0.531.g2ccb3012c9-goog

[PATCH 1/2] f2fs: allow to recover node blocks given updated checkpoint

[Jaegeuk Kim]

If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
forward recovery. Let's relax the condition to recover them.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/node.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 0ee3e5ff49a3..15280eeb24ea 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -305,10 +305,11 @@ static inline bool is_recoverable_dnode(struct page *page)
 	struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
 	__u64 cp_ver = cur_cp_version(ckpt);
 
-	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
+	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) {
 		cp_ver |= (cur_cp_crc(ckpt) << 32);
-
-	return cp_ver == cpver_of_node(page);
+		return cp_ver == cpver_of_node(page);
+	}
+	return (cp_ver << 32) == (cpver_of_node(page) << 32);
 }
 
 /*
-- 
2.15.0.531.g2ccb3012c9-goog


------------------------------------------------------------------------------
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[PATCH 2/2] f2fs: recover some i_inline flags

[Jaegeuk Kim]

This fixes lost i_inline flags during roll-forward.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/recovery.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index cbeef73bc4dd..2354f1e05e19 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -211,6 +211,15 @@ static void recover_inode(struct inode *inode, struct page *page)
 
 	F2FS_I(inode)->i_advise = raw->i_advise;
 
+	if (raw->i_inline & F2FS_PIN_FILE)
+		set_inode_flag(inode, FI_PIN_FILE);
+	if (raw->i_inline & F2FS_DATA_EXIST)
+		set_inode_flag(inode, FI_DATA_EXIST);
+	else
+		clear_inode_flag(inode, FI_DATA_EXIST);
+	if (!(raw->i_inline & F2FS_INLINE_DOTS))
+		clear_inode_flag(inode, FI_INLINE_DOTS);
+
 	if (file_enc_name(inode))
 		name = "<encrypted>";
 	else
-- 
2.15.0.531.g2ccb3012c9-goog

[PATCH 2/2] f2fs: recover some i_inline flags

[Jaegeuk Kim]

This fixes lost i_inline flags during roll-forward.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/recovery.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index cbeef73bc4dd..2354f1e05e19 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -211,6 +211,15 @@ static void recover_inode(struct inode *inode, struct page *page)
 
 	F2FS_I(inode)->i_advise = raw->i_advise;
 
+	if (raw->i_inline & F2FS_PIN_FILE)
+		set_inode_flag(inode, FI_PIN_FILE);
+	if (raw->i_inline & F2FS_DATA_EXIST)
+		set_inode_flag(inode, FI_DATA_EXIST);
+	else
+		clear_inode_flag(inode, FI_DATA_EXIST);
+	if (!(raw->i_inline & F2FS_INLINE_DOTS))
+		clear_inode_flag(inode, FI_INLINE_DOTS);
+
 	if (file_enc_name(inode))
 		name = "<encrypted>";
 	else
-- 
2.15.0.531.g2ccb3012c9-goog


------------------------------------------------------------------------------
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Re: [f2fs-dev] [PATCH 1/2] f2fs: allow to recover node blocks given updated checkpoint

[Chao Yu]

On 2018/1/20 12:26, Jaegeuk Kim wrote:
> If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
> forward recovery. Let's relax the condition to recover them.

As this is fsck case only, what about writing checkpoint with special flag
for such case, and relax the condition if flag was set, so, for normal case,
it can avoid recovering obsolete data.

Thanks,

> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
>  fs/f2fs/node.h | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
> index 0ee3e5ff49a3..15280eeb24ea 100644
> --- a/fs/f2fs/node.h
> +++ b/fs/f2fs/node.h
> @@ -305,10 +305,11 @@ static inline bool is_recoverable_dnode(struct page *page)
>  	struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
>  	__u64 cp_ver = cur_cp_version(ckpt);
>  
> -	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
> +	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) {
>  		cp_ver |= (cur_cp_crc(ckpt) << 32);
> -
> -	return cp_ver == cpver_of_node(page);
> +		return cp_ver == cpver_of_node(page);
> +	}
> +	return (cp_ver << 32) == (cpver_of_node(page) << 32);
>  }
>  
>  /*
> 

Re: [PATCH 1/2] f2fs: allow to recover node blocks given updated checkpoint

[Chao Yu]

On 2018/1/20 12:26, Jaegeuk Kim wrote:
> If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
> forward recovery. Let's relax the condition to recover them.

As this is fsck case only, what about writing checkpoint with special flag
for such case, and relax the condition if flag was set, so, for normal case,
it can avoid recovering obsolete data.

Thanks,

> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
>  fs/f2fs/node.h | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
> index 0ee3e5ff49a3..15280eeb24ea 100644
> --- a/fs/f2fs/node.h
> +++ b/fs/f2fs/node.h
> @@ -305,10 +305,11 @@ static inline bool is_recoverable_dnode(struct page *page)
>  	struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
>  	__u64 cp_ver = cur_cp_version(ckpt);
>  
> -	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
> +	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG)) {
>  		cp_ver |= (cur_cp_crc(ckpt) << 32);
> -
> -	return cp_ver == cpver_of_node(page);
> +		return cp_ver == cpver_of_node(page);
> +	}
> +	return (cp_ver << 32) == (cpver_of_node(page) << 32);
>  }
>  
>  /*
> 

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Re: [f2fs-dev] [PATCH 2/2] f2fs: recover some i_inline flags

[Chao Yu]

On 2018/1/20 12:26, Jaegeuk Kim wrote:
> This fixes lost i_inline flags during roll-forward.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
>  fs/f2fs/recovery.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
> index cbeef73bc4dd..2354f1e05e19 100644
> --- a/fs/f2fs/recovery.c
> +++ b/fs/f2fs/recovery.c
> @@ -211,6 +211,15 @@ static void recover_inode(struct inode *inode, struct page *page)
>  
>  	F2FS_I(inode)->i_advise = raw->i_advise;

How about adding recover_inline_flags() including below changes?

>  
> +	if (raw->i_inline & F2FS_PIN_FILE)
> +		set_inode_flag(inode, FI_PIN_FILE);

else
	clear_inode_flag(inode, FI_PIN_FILE); ?

Thanks,

> +	if (raw->i_inline & F2FS_DATA_EXIST)
> +		set_inode_flag(inode, FI_DATA_EXIST);
> +	else
> +		clear_inode_flag(inode, FI_DATA_EXIST);
> +	if (!(raw->i_inline & F2FS_INLINE_DOTS))
> +		clear_inode_flag(inode, FI_INLINE_DOTS);
> +
>  	if (file_enc_name(inode))
>  		name = "<encrypted>";
>  	else
> 

Re: [PATCH 2/2] f2fs: recover some i_inline flags

[Chao Yu]

On 2018/1/20 12:26, Jaegeuk Kim wrote:
> This fixes lost i_inline flags during roll-forward.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
> ---
>  fs/f2fs/recovery.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
> index cbeef73bc4dd..2354f1e05e19 100644
> --- a/fs/f2fs/recovery.c
> +++ b/fs/f2fs/recovery.c
> @@ -211,6 +211,15 @@ static void recover_inode(struct inode *inode, struct page *page)
>  
>  	F2FS_I(inode)->i_advise = raw->i_advise;

How about adding recover_inline_flags() including below changes?

>  
> +	if (raw->i_inline & F2FS_PIN_FILE)
> +		set_inode_flag(inode, FI_PIN_FILE);

else
	clear_inode_flag(inode, FI_PIN_FILE); ?

Thanks,

> +	if (raw->i_inline & F2FS_DATA_EXIST)
> +		set_inode_flag(inode, FI_DATA_EXIST);
> +	else
> +		clear_inode_flag(inode, FI_DATA_EXIST);
> +	if (!(raw->i_inline & F2FS_INLINE_DOTS))
> +		clear_inode_flag(inode, FI_INLINE_DOTS);
> +
>  	if (file_enc_name(inode))
>  		name = "<encrypted>";
>  	else
> 

------------------------------------------------------------------------------
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Re: [PATCH 1/2 v2] f2fs: allow to recover node blocks given updated checkpoint

[Jaegeuk Kim]

If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
forward recovery. Let's relax the condition to recover them.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

Change log from v1:
 - add a new checkpoint flag to handle this

 fs/f2fs/checkpoint.c    | 1 +
 fs/f2fs/node.h          | 4 ++++
 include/linux/f2fs_fs.h | 1 +
 3 files changed, 6 insertions(+)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 9c7596f7daae..512dca8abc7d 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1157,6 +1157,7 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 
 	/* set this flag to activate crc|cp_ver for recovery */
 	__set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
+	__clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
 
 	spin_unlock_irqrestore(&sbi->cp_lock, flags);
 }
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 0ee3e5ff49a3..081ef0d672bf 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -305,6 +305,10 @@ static inline bool is_recoverable_dnode(struct page *page)
 	struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
 	__u64 cp_ver = cur_cp_version(ckpt);
 
+	/* Don't care crc part, if fsck.f2fs sets it. */
+	if (__is_set_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG))
+		return (cp_ver << 32) == (cpver_of_node(page) << 32);
+
 	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
 		cp_ver |= (cur_cp_crc(ckpt) << 32);
 
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index cfb522e6affc..6eed677b6d9a 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -117,6 +117,7 @@ struct f2fs_super_block {
 /*
  * For checkpoint
  */
+#define CP_NOCRC_RECOVERY_FLAG	0x00000200
 #define CP_TRIMMED_FLAG		0x00000100
 #define CP_NAT_BITS_FLAG	0x00000080
 #define CP_CRC_RECOVERY_FLAG	0x00000040
-- 
2.15.0.531.g2ccb3012c9-goog

Re: [PATCH 1/2 v2] f2fs: allow to recover node blocks given updated checkpoint

[Jaegeuk Kim]

If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
forward recovery. Let's relax the condition to recover them.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

Change log from v1:
 - add a new checkpoint flag to handle this

 fs/f2fs/checkpoint.c    | 1 +
 fs/f2fs/node.h          | 4 ++++
 include/linux/f2fs_fs.h | 1 +
 3 files changed, 6 insertions(+)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 9c7596f7daae..512dca8abc7d 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1157,6 +1157,7 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 
 	/* set this flag to activate crc|cp_ver for recovery */
 	__set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
+	__clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
 
 	spin_unlock_irqrestore(&sbi->cp_lock, flags);
 }
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 0ee3e5ff49a3..081ef0d672bf 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -305,6 +305,10 @@ static inline bool is_recoverable_dnode(struct page *page)
 	struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
 	__u64 cp_ver = cur_cp_version(ckpt);
 
+	/* Don't care crc part, if fsck.f2fs sets it. */
+	if (__is_set_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG))
+		return (cp_ver << 32) == (cpver_of_node(page) << 32);
+
 	if (__is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
 		cp_ver |= (cur_cp_crc(ckpt) << 32);
 
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index cfb522e6affc..6eed677b6d9a 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -117,6 +117,7 @@ struct f2fs_super_block {
 /*
  * For checkpoint
  */
+#define CP_NOCRC_RECOVERY_FLAG	0x00000200
 #define CP_TRIMMED_FLAG		0x00000100
 #define CP_NAT_BITS_FLAG	0x00000080
 #define CP_CRC_RECOVERY_FLAG	0x00000040
-- 
2.15.0.531.g2ccb3012c9-goog


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Re: [PATCH 2/2 v2] f2fs: recover some i_inline flags

[Jaegeuk Kim]

This fixes lost i_inline flags during roll-forward.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

Change log from v1:
 - add a new function to recover the flag
 - fix missing pin_file unset

 fs/f2fs/recovery.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index cbeef73bc4dd..337f3363f48f 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -195,6 +195,20 @@ static int recover_dentry(struct inode *inode, struct page *ipage,
 	return err;
 }
 
+static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri)
+{
+	if (ri->i_inline & F2FS_PIN_FILE)
+		set_inode_flag(inode, FI_PIN_FILE);
+	else
+		clear_inode_flag(inode, FI_PIN_FILE);
+	if (ri->i_inline & F2FS_DATA_EXIST)
+		set_inode_flag(inode, FI_DATA_EXIST);
+	else
+		clear_inode_flag(inode, FI_DATA_EXIST);
+	if (!(ri->i_inline & F2FS_INLINE_DOTS))
+		clear_inode_flag(inode, FI_INLINE_DOTS);
+}
+
 static void recover_inode(struct inode *inode, struct page *page)
 {
 	struct f2fs_inode *raw = F2FS_INODE(page);
@@ -211,13 +225,16 @@ static void recover_inode(struct inode *inode, struct page *page)
 
 	F2FS_I(inode)->i_advise = raw->i_advise;
 
+	recover_inline_flags(inode, raw);
+
 	if (file_enc_name(inode))
 		name = "<encrypted>";
 	else
 		name = F2FS_INODE(page)->i_name;
 
-	f2fs_msg(inode->i_sb, KERN_NOTICE, "recover_inode: ino = %x, name = %s",
-			ino_of_node(page), name);
+	f2fs_msg(inode->i_sb, KERN_NOTICE,
+		"recover_inode: ino = %x, name = %s, inline = %x",
+			ino_of_node(page), name, raw->i_inline);
 }
 
 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
-- 
2.15.0.531.g2ccb3012c9-goog

Re: [PATCH 2/2 v2] f2fs: recover some i_inline flags

[Jaegeuk Kim]

This fixes lost i_inline flags during roll-forward.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

Change log from v1:
 - add a new function to recover the flag
 - fix missing pin_file unset

 fs/f2fs/recovery.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index cbeef73bc4dd..337f3363f48f 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -195,6 +195,20 @@ static int recover_dentry(struct inode *inode, struct page *ipage,
 	return err;
 }
 
+static void recover_inline_flags(struct inode *inode, struct f2fs_inode *ri)
+{
+	if (ri->i_inline & F2FS_PIN_FILE)
+		set_inode_flag(inode, FI_PIN_FILE);
+	else
+		clear_inode_flag(inode, FI_PIN_FILE);
+	if (ri->i_inline & F2FS_DATA_EXIST)
+		set_inode_flag(inode, FI_DATA_EXIST);
+	else
+		clear_inode_flag(inode, FI_DATA_EXIST);
+	if (!(ri->i_inline & F2FS_INLINE_DOTS))
+		clear_inode_flag(inode, FI_INLINE_DOTS);
+}
+
 static void recover_inode(struct inode *inode, struct page *page)
 {
 	struct f2fs_inode *raw = F2FS_INODE(page);
@@ -211,13 +225,16 @@ static void recover_inode(struct inode *inode, struct page *page)
 
 	F2FS_I(inode)->i_advise = raw->i_advise;
 
+	recover_inline_flags(inode, raw);
+
 	if (file_enc_name(inode))
 		name = "<encrypted>";
 	else
 		name = F2FS_INODE(page)->i_name;
 
-	f2fs_msg(inode->i_sb, KERN_NOTICE, "recover_inode: ino = %x, name = %s",
-			ino_of_node(page), name);
+	f2fs_msg(inode->i_sb, KERN_NOTICE,
+		"recover_inode: ino = %x, name = %s, inline = %x",
+			ino_of_node(page), name, raw->i_inline);
 }
 
 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
-- 
2.15.0.531.g2ccb3012c9-goog


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Re: [f2fs-dev] [PATCH 1/2 v2] f2fs: allow to recover node blocks given updated checkpoint

[Chao Yu]

On 2018/1/21 6:05, Jaegeuk Kim wrote:
> If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
> forward recovery. Let's relax the condition to recover them.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Reviewed-by: Chao Yu <yuchao0@huawei.com>

Thanks,

Re: [PATCH 1/2 v2] f2fs: allow to recover node blocks given updated checkpoint

[Chao Yu]

On 2018/1/21 6:05, Jaegeuk Kim wrote:
> If fsck.f2fs changes crc, we have no way to recover some inode blocks by roll-
> forward recovery. Let's relax the condition to recover them.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Reviewed-by: Chao Yu <yuchao0@huawei.com>

Thanks,

------------------------------------------------------------------------------
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Re: [f2fs-dev] [PATCH 2/2 v2] f2fs: recover some i_inline flags

[Chao Yu]

On 2018/1/21 6:06, Jaegeuk Kim wrote:
> This fixes lost i_inline flags during roll-forward.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Reviewed-by: Chao Yu <yuchao0@huawei.com>

Thanks,

Re: [PATCH 2/2 v2] f2fs: recover some i_inline flags

[Chao Yu]

On 2018/1/21 6:06, Jaegeuk Kim wrote:
> This fixes lost i_inline flags during roll-forward.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Reviewed-by: Chao Yu <yuchao0@huawei.com>

Thanks,

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