diff mbox series

[v4,01/34] ext4: factor out a common helper to query extent map

Message ID 20240410142948.2817554-2-yi.zhang@huaweicloud.com
State New
Headers show
Series ext4: use iomap for regular file's buffered IO path and enable large folio | expand

Commit Message

Zhang Yi April 10, 2024, 2:29 p.m. UTC 
From: Zhang Yi <yi.zhang@huawei.com>

Factor out a new common helper ext4_map_query_blocks() from the
ext4_da_map_blocks(), it query and return the extent map status on the
inode's extent path, no logic changes.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
---
 fs/ext4/inode.c | 57 +++++++++++++++++++++++++++----------------------
 1 file changed, 32 insertions(+), 25 deletions(-)

Comments

Ritesh Harjani (IBM) April 26, 2024, 11:55 a.m. UTC | #1 
Zhang Yi <yi.zhang@huaweicloud.com> writes:

> From: Zhang Yi <yi.zhang@huawei.com>
>
> Factor out a new common helper ext4_map_query_blocks() from the
> ext4_da_map_blocks(), it query and return the extent map status on the
> inode's extent path, no logic changes.
>
> Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
> ---
>  fs/ext4/inode.c | 57 +++++++++++++++++++++++++++----------------------
>  1 file changed, 32 insertions(+), 25 deletions(-)

Looks good to me. Straight forward refactoring.
Feel free to add - 

Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>

>
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 537803250ca9..6a41172c06e1 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -453,6 +453,35 @@ static void ext4_map_blocks_es_recheck(handle_t *handle,
>  }
>  #endif /* ES_AGGRESSIVE_TEST */
>  
> +static int ext4_map_query_blocks(handle_t *handle, struct inode *inode,
> +				 struct ext4_map_blocks *map)
> +{
> +	unsigned int status;
> +	int retval;
> +
> +	if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
> +		retval = ext4_ext_map_blocks(handle, inode, map, 0);
> +	else
> +		retval = ext4_ind_map_blocks(handle, inode, map, 0);
> +
> +	if (retval <= 0)
> +		return retval;
> +
> +	if (unlikely(retval != map->m_len)) {
> +		ext4_warning(inode->i_sb,
> +			     "ES len assertion failed for inode "
> +			     "%lu: retval %d != map->m_len %d",
> +			     inode->i_ino, retval, map->m_len);
> +		WARN_ON(1);
> +	}
> +
> +	status = map->m_flags & EXT4_MAP_UNWRITTEN ?
> +			EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
> +	ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
> +			      map->m_pblk, status);
> +	return retval;
> +}
> +
>  /*
>   * The ext4_map_blocks() function tries to look up the requested blocks,
>   * and returns if the blocks are already mapped.
> @@ -1744,33 +1773,11 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
>  	down_read(&EXT4_I(inode)->i_data_sem);
>  	if (ext4_has_inline_data(inode))
>  		retval = 0;
> -	else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
> -		retval = ext4_ext_map_blocks(NULL, inode, map, 0);
>  	else
> -		retval = ext4_ind_map_blocks(NULL, inode, map, 0);
> -	if (retval < 0) {
> -		up_read(&EXT4_I(inode)->i_data_sem);
> -		return retval;
> -	}
> -	if (retval > 0) {
> -		unsigned int status;
> -
> -		if (unlikely(retval != map->m_len)) {
> -			ext4_warning(inode->i_sb,
> -				     "ES len assertion failed for inode "
> -				     "%lu: retval %d != map->m_len %d",
> -				     inode->i_ino, retval, map->m_len);
> -			WARN_ON(1);
> -		}
> -
> -		status = map->m_flags & EXT4_MAP_UNWRITTEN ?
> -				EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
> -		ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
> -				      map->m_pblk, status);
> -		up_read(&EXT4_I(inode)->i_data_sem);
> -		return retval;
> -	}
> +		retval = ext4_map_query_blocks(NULL, inode, map);
>  	up_read(&EXT4_I(inode)->i_data_sem);
> +	if (retval)
> +		return retval;
>  
>  add_delayed:
>  	down_write(&EXT4_I(inode)->i_data_sem);
> -- 
> 2.39.2
diff mbox series

Patch

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 537803250ca9..6a41172c06e1 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -453,6 +453,35 @@  static void ext4_map_blocks_es_recheck(handle_t *handle,
 }
 #endif /* ES_AGGRESSIVE_TEST */
 
+static int ext4_map_query_blocks(handle_t *handle, struct inode *inode,
+				 struct ext4_map_blocks *map)
+{
+	unsigned int status;
+	int retval;
+
+	if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
+		retval = ext4_ext_map_blocks(handle, inode, map, 0);
+	else
+		retval = ext4_ind_map_blocks(handle, inode, map, 0);
+
+	if (retval <= 0)
+		return retval;
+
+	if (unlikely(retval != map->m_len)) {
+		ext4_warning(inode->i_sb,
+			     "ES len assertion failed for inode "
+			     "%lu: retval %d != map->m_len %d",
+			     inode->i_ino, retval, map->m_len);
+		WARN_ON(1);
+	}
+
+	status = map->m_flags & EXT4_MAP_UNWRITTEN ?
+			EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
+	ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
+			      map->m_pblk, status);
+	return retval;
+}
+
 /*
  * The ext4_map_blocks() function tries to look up the requested blocks,
  * and returns if the blocks are already mapped.
@@ -1744,33 +1773,11 @@  static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
 	down_read(&EXT4_I(inode)->i_data_sem);
 	if (ext4_has_inline_data(inode))
 		retval = 0;
-	else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
-		retval = ext4_ext_map_blocks(NULL, inode, map, 0);
 	else
-		retval = ext4_ind_map_blocks(NULL, inode, map, 0);
-	if (retval < 0) {
-		up_read(&EXT4_I(inode)->i_data_sem);
-		return retval;
-	}
-	if (retval > 0) {
-		unsigned int status;
-
-		if (unlikely(retval != map->m_len)) {
-			ext4_warning(inode->i_sb,
-				     "ES len assertion failed for inode "
-				     "%lu: retval %d != map->m_len %d",
-				     inode->i_ino, retval, map->m_len);
-			WARN_ON(1);
-		}
-
-		status = map->m_flags & EXT4_MAP_UNWRITTEN ?
-				EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
-		ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
-				      map->m_pblk, status);
-		up_read(&EXT4_I(inode)->i_data_sem);
-		return retval;
-	}
+		retval = ext4_map_query_blocks(NULL, inode, map);
 	up_read(&EXT4_I(inode)->i_data_sem);
+	if (retval)
+		return retval;
 
 add_delayed:
 	down_write(&EXT4_I(inode)->i_data_sem);