On Wed, Jul 10, 2024 at 12:06:50PM +0800, libaokun@xxxxxxxxxxxxxxx wrote:
> From: Baokun Li <libaokun1@xxxxxxxxxx>
>
> The use of path and ppath is now very confusing, so to make the code more
> readable, pass path between functions uniformly, and get rid of ppath.
>
> To get rid of the ppath in ext4_convert_unwritten_extents_endio(), the
> following is done here:
>
> * Free the extents path when an error is encountered.
> * Its caller needs to update ppath if it uses ppath.
>
> No functional changes.
>
> Signed-off-by: Baokun Li <libaokun1@xxxxxxxxxx>
Looks good Baokun, feel free to add:
Reviewed-by: Ojaswin Mujoo <ojaswin@xxxxxxxxxxxxx>
Regards,
ojaswin
> ---
> fs/ext4/extents.c | 43 +++++++++++++++++++++++--------------------
> 1 file changed, 23 insertions(+), 20 deletions(-)
>
> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
> index a41cbb8c4475..b7f443f98e9d 100644
> --- a/fs/ext4/extents.c
> +++ b/fs/ext4/extents.c
> @@ -3745,12 +3745,11 @@ static struct ext4_ext_path *ext4_split_convert_extents(handle_t *handle,
> allocated);
> }
>
> -static int ext4_convert_unwritten_extents_endio(handle_t *handle,
> - struct inode *inode,
> - struct ext4_map_blocks *map,
> - struct ext4_ext_path **ppath)
> +static struct ext4_ext_path *
> +ext4_convert_unwritten_extents_endio(handle_t *handle, struct inode *inode,
> + struct ext4_map_blocks *map,
> + struct ext4_ext_path *path)
> {
> - struct ext4_ext_path *path = *ppath;
> struct ext4_extent *ex;
> ext4_lblk_t ee_block;
> unsigned int ee_len;
> @@ -3780,24 +3779,19 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle,
> #endif
> path = ext4_split_convert_extents(handle, inode, map, path,
> EXT4_GET_BLOCKS_CONVERT, NULL);
> - if (IS_ERR(path)) {
> - *ppath = NULL;
> - return PTR_ERR(path);
> - }
> + if (IS_ERR(path))
> + return path;
>
> path = ext4_find_extent(inode, map->m_lblk, path, 0);
> - if (IS_ERR(path)) {
> - *ppath = NULL;
> - return PTR_ERR(path);
> - }
> - *ppath = path;
> + if (IS_ERR(path))
> + return path;
> depth = ext_depth(inode);
> ex = path[depth].p_ext;
> }
>
> err = ext4_ext_get_access(handle, inode, path + depth);
> if (err)
> - goto out;
> + goto errout;
> /* first mark the extent as initialized */
> ext4_ext_mark_initialized(ex);
>
> @@ -3808,9 +3802,15 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle,
>
> /* Mark modified extent as dirty */
> err = ext4_ext_dirty(handle, inode, path + path->p_depth);
> -out:
> + if (err)
> + goto errout;
> +
> ext4_ext_show_leaf(inode, path);
> - return err;
> + return path;
> +
> +errout:
> + ext4_free_ext_path(path);
> + return ERR_PTR(err);
> }
>
> static int
> @@ -3938,10 +3938,13 @@ ext4_ext_handle_unwritten_extents(handle_t *handle, struct inode *inode,
> }
> /* IO end_io complete, convert the filled extent to written */
> if (flags & EXT4_GET_BLOCKS_CONVERT) {
> - err = ext4_convert_unwritten_extents_endio(handle, inode, map,
> - ppath);
> - if (err < 0)
> + *ppath = ext4_convert_unwritten_extents_endio(handle, inode,
> + map, *ppath);
> + if (IS_ERR(*ppath)) {
> + err = PTR_ERR(*ppath);
> + *ppath = NULL;
> goto out2;
> + }
> ext4_update_inode_fsync_trans(handle, inode, 1);
> goto map_out;
> }
> --
> 2.39.2
>
