[PATCH 1/2] btrfs: remove check for BTRFS_FS_STATE_ERROR which we just set

[PATCH 1/2] btrfs: remove check for BTRFS_FS_STATE_ERROR which we just set

[Anand Jain]

__btrfs_handle_fs_error() sets BTRFS_FS_STATE_ERROR, and calls
btrfs_handle_error() so no need to check if the BTRFS_FS_STATE_ERROR
is set in btrfs_handle_error(). And there is no other user of
btrfs_handle_error() as well.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 fs/btrfs/super.c | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 4c49bb5632a2..60766f8ca434 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -113,20 +113,18 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
 	if (sb_rdonly(sb))
 		return;
 
-	if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) {
-		sb->s_flags |= SB_RDONLY;
-		btrfs_info(fs_info, "forced readonly");
-		/*
-		 * Note that a running device replace operation is not
-		 * canceled here although there is no way to update
-		 * the progress. It would add the risk of a deadlock,
-		 * therefore the canceling is omitted. The only penalty
-		 * is that some I/O remains active until the procedure
-		 * completes. The next time when the filesystem is
-		 * mounted writeable again, the device replace
-		 * operation continues.
-		 */
-	}
+	sb->s_flags |= SB_RDONLY;
+	btrfs_info(fs_info, "forced readonly");
+	/*
+	 * Note that a running device replace operation is not
+	 * canceled here although there is no way to update
+	 * the progress. It would add the risk of a deadlock,
+	 * therefore the canceling is omitted. The only penalty
+	 * is that some I/O remains active until the procedure
+	 * completes. The next time when the filesystem is
+	 * mounted writeable again, the device replace
+	 * operation continues.
+	 */
 }
 
 /*
-- 
2.15.0

[PATCH 2/2] btrfS: collapse btrfs_handle_error() into __btrfs_handle_fs_error()

[Anand Jain]

There is no other consumer for btrfs_handle_error() other than
__btrfs_handle_fs_error(), further this function quite small.
Merge it into its parent.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 fs/btrfs/super.c | 43 +++++++++++++++++++------------------------
 1 file changed, 19 insertions(+), 24 deletions(-)

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 60766f8ca434..0216a5dd0f4b 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -105,28 +105,6 @@ const char *btrfs_decode_error(int errno)
 	return errstr;
 }
 
-/* btrfs handle error by forcing the filesystem readonly */
-static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
-{
-	struct super_block *sb = fs_info->sb;
-
-	if (sb_rdonly(sb))
-		return;
-
-	sb->s_flags |= SB_RDONLY;
-	btrfs_info(fs_info, "forced readonly");
-	/*
-	 * Note that a running device replace operation is not
-	 * canceled here although there is no way to update
-	 * the progress. It would add the risk of a deadlock,
-	 * therefore the canceling is omitted. The only penalty
-	 * is that some I/O remains active until the procedure
-	 * completes. The next time when the filesystem is
-	 * mounted writeable again, the device replace
-	 * operation continues.
-	 */
-}
-
 /*
  * __btrfs_handle_fs_error decodes expected errors from the caller and
  * invokes the approciate error response.
@@ -173,8 +151,25 @@ void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function
 	set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state);
 
 	/* Don't go through full error handling during mount */
-	if (sb->s_flags & SB_BORN)
-		btrfs_handle_error(fs_info);
+	if (!(sb->s_flags & SB_BORN))
+		return;
+
+	if (sb_rdonly(sb))
+		return;
+
+	/* btrfs handle error by forcing the filesystem readonly */
+	sb->s_flags |= SB_RDONLY;
+	btrfs_info(fs_info, "forced readonly");
+	/*
+	 * Note that a running device replace operation is not
+	 * canceled here although there is no way to update
+	 * the progress. It would add the risk of a deadlock,
+	 * therefore the canceling is omitted. The only penalty
+	 * is that some I/O remains active until the procedure
+	 * completes. The next time when the filesystem is
+	 * mounted writeable again, the device replace
+	 * operation continues.
+	 */
 }
 
 #ifdef CONFIG_PRINTK
-- 
2.15.0

Re: [PATCH 2/2] btrfS: collapse btrfs_handle_error() into __btrfs_handle_fs_error()

[Nikolay Borisov]

On  4.01.2018 12:01, Anand Jain wrote:
> There is no other consumer for btrfs_handle_error() other than
> __btrfs_handle_fs_error(), further this function quite small.
> Merge it into its parent.
> 
> Signed-off-by: Anand Jain <anand.jain@oracle.com>

Reviewed-by: Nikolay Borisov <nborisov@suse.com>

> ---
>  fs/btrfs/super.c | 43 +++++++++++++++++++------------------------
>  1 file changed, 19 insertions(+), 24 deletions(-)
> 
> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
> index 60766f8ca434..0216a5dd0f4b 100644
> --- a/fs/btrfs/super.c
> +++ b/fs/btrfs/super.c
> @@ -105,28 +105,6 @@ const char *btrfs_decode_error(int errno)
>  	return errstr;
>  }
>  
> -/* btrfs handle error by forcing the filesystem readonly */
> -static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
> -{
> -	struct super_block *sb = fs_info->sb;
> -
> -	if (sb_rdonly(sb))
> -		return;
> -
> -	sb->s_flags |= SB_RDONLY;
> -	btrfs_info(fs_info, "forced readonly");
> -	/*
> -	 * Note that a running device replace operation is not
> -	 * canceled here although there is no way to update
> -	 * the progress. It would add the risk of a deadlock,
> -	 * therefore the canceling is omitted. The only penalty
> -	 * is that some I/O remains active until the procedure
> -	 * completes. The next time when the filesystem is
> -	 * mounted writeable again, the device replace
> -	 * operation continues.
> -	 */
> -}
> -
>  /*
>   * __btrfs_handle_fs_error decodes expected errors from the caller and
>   * invokes the approciate error response.
> @@ -173,8 +151,25 @@ void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function
>  	set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state);
>  
>  	/* Don't go through full error handling during mount */
> -	if (sb->s_flags & SB_BORN)
> -		btrfs_handle_error(fs_info);
> +	if (!(sb->s_flags & SB_BORN))
> +		return;
> +
> +	if (sb_rdonly(sb))
> +		return;
> +
> +	/* btrfs handle error by forcing the filesystem readonly */
> +	sb->s_flags |= SB_RDONLY;
> +	btrfs_info(fs_info, "forced readonly");
> +	/*
> +	 * Note that a running device replace operation is not
> +	 * canceled here although there is no way to update
> +	 * the progress. It would add the risk of a deadlock,
> +	 * therefore the canceling is omitted. The only penalty
> +	 * is that some I/O remains active until the procedure
> +	 * completes. The next time when the filesystem is
> +	 * mounted writeable again, the device replace
> +	 * operation continues.
> +	 */
>  }
>  
>  #ifdef CONFIG_PRINTK
> 

Re: [PATCH 2/2] btrfS: collapse btrfs_handle_error() into __btrfs_handle_fs_error()

[David Sterba]

On Thu, Jan 04, 2018 at 02:11:21PM +0200, Nikolay Borisov wrote:
> 
> 
> On  4.01.2018 12:01, Anand Jain wrote:
> > There is no other consumer for btrfs_handle_error() other than
> > __btrfs_handle_fs_error(), further this function quite small.
> > Merge it into its parent.
> > 
> > Signed-off-by: Anand Jain <anand.jain@oracle.com>
> 
> Reviewed-by: Nikolay Borisov <nborisov@suse.com>

Both patches added to for-next, thanks.

Re: [PATCH 1/2] btrfs: remove check for BTRFS_FS_STATE_ERROR which we just set

[Nikolay Borisov]

On  4.01.2018 12:01, Anand Jain wrote:
> __btrfs_handle_fs_error() sets BTRFS_FS_STATE_ERROR, and calls
> btrfs_handle_error() so no need to check if the BTRFS_FS_STATE_ERROR
> is set in btrfs_handle_error(). And there is no other user of
> btrfs_handle_error() as well.
> 
> Signed-off-by: Anand Jain <anand.jain@oracle.com>

Reviewed-by: Nikolay Borisov <nborisov@suse.com>

> ---
>  fs/btrfs/super.c | 26 ++++++++++++--------------
>  1 file changed, 12 insertions(+), 14 deletions(-)
> 
> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
> index 4c49bb5632a2..60766f8ca434 100644
> --- a/fs/btrfs/super.c
> +++ b/fs/btrfs/super.c
> @@ -113,20 +113,18 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
>  	if (sb_rdonly(sb))
>  		return;
>  
> -	if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) {
> -		sb->s_flags |= SB_RDONLY;
> -		btrfs_info(fs_info, "forced readonly");
> -		/*
> -		 * Note that a running device replace operation is not
> -		 * canceled here although there is no way to update
> -		 * the progress. It would add the risk of a deadlock,
> -		 * therefore the canceling is omitted. The only penalty
> -		 * is that some I/O remains active until the procedure
> -		 * completes. The next time when the filesystem is
> -		 * mounted writeable again, the device replace
> -		 * operation continues.
> -		 */
> -	}
> +	sb->s_flags |= SB_RDONLY;
> +	btrfs_info(fs_info, "forced readonly");
> +	/*
> +	 * Note that a running device replace operation is not
> +	 * canceled here although there is no way to update
> +	 * the progress. It would add the risk of a deadlock,
> +	 * therefore the canceling is omitted. The only penalty
> +	 * is that some I/O remains active until the procedure
> +	 * completes. The next time when the filesystem is
> +	 * mounted writeable again, the device replace
> +	 * operation continues.
> +	 */
>  }
>  
>  /*
>