[PATCH v2 09/25] ext4: add new ext4_ext_path_brelse() helper

libaokun
2024-08-22T02:40:38Z

Add ext4_ext_path_brelse() helper function to reduce duplicate code
and ensure that path->p_bh is set to NULL after it is released.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Tested-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
---
fs/ext4/extents.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index c4a4573440c1..5e760d1a0eff 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -106,6 +106,12 @@ static int ext4_ext_trunc_restart_fn(struct inode *inode, int *dropped)
return 0;
}

+static inline void ext4_ext_path_brelse(struct ext4_ext_path *path)
+{
+ brelse(path->p_bh);
+ path->p_bh = NULL;
+}
+
static void ext4_ext_drop_refs(struct ext4_ext_path *path)
{
int depth, i;
@@ -113,10 +119,8 @@ static void ext4_ext_drop_refs(struct ext4_ext_path *path)
if (!path)
return;
depth = path->p_depth;
- for (i = 0; i <= depth; i++, path++) {
- brelse(path->p_bh);
- path->p_bh = NULL;
- }
+ for (i = 0; i <= depth; i++, path++)
+ ext4_ext_path_brelse(path);
}

void ext4_free_ext_path(struct ext4_ext_path *path)
@@ -635,8 +639,7 @@ int ext4_ext_precache(struct inode *inode)
*/
if ((i == depth) ||
path[i].p_idx > EXT_LAST_INDEX(path[i].p_hdr)) {
- brelse(path[i].p_bh);
- path[i].p_bh = NULL;
+ ext4_ext_path_brelse(path + i);
i--;
continue;
}
@@ -1889,8 +1892,7 @@ static void ext4_ext_try_to_merge_up(handle_t *handle,
(path[1].p_ext - EXT_FIRST_EXTENT(path[1].p_hdr));
path[0].p_hdr->eh_max = cpu_to_le16(max_root);

- brelse(path[1].p_bh);
- path[1].p_bh = NULL;
+ ext4_ext_path_brelse(path + 1);
ext4_free_blocks(handle, inode, NULL, blk, 1,
EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET);
}
@@ -2959,8 +2961,7 @@ int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start,
err = ext4_ext_rm_leaf(handle, inode, path,
&partial, start, end);
/* root level has p_bh == NULL, brelse() eats this */
- brelse(path[i].p_bh);
- path[i].p_bh = NULL;
+ ext4_ext_path_brelse(path + i);
i--;
continue;
}
@@ -3022,8 +3023,7 @@ int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start,
err = ext4_ext_rm_idx(handle, inode, path, i);
}
/* root level has p_bh == NULL, brelse() eats this */
- brelse(path[i].p_bh);
- path[i].p_bh = NULL;
+ ext4_ext_path_brelse(path + i);
i--;
ext_debug(inode, "return to level %d\n", i);
}
--
2.39.2