On Fri 30-05-25 14:28:57, Zhang Yi wrote:
> From: Zhang Yi <yi.zhang@xxxxxxxxxx>
>
> The calculation of journal credits in ext4_meta_trans_blocks() should
> include pextents, as each extent separately may be allocated from a
> different group and thus need to update different bitmap and group
> descriptor block.
>
> Fixes: 0e32d8617012 ("ext4: correct the journal credits calculations of allocating blocks")
> Reported-by:: Jan Kara <jack@xxxxxxx>
> Closes: https://lore.kernel.org/linux-ext4/nhxfuu53wyacsrq7xqgxvgzcggyscu2tbabginahcygvmc45hy@t4fvmyeky33e/
> Signed-off-by: Zhang Yi <yi.zhang@xxxxxxxxxx>
Looks good. Feel free to add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> fs/ext4/inode.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 1818a2a7ba8f..e7de2fafc941 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -6184,7 +6184,7 @@ int ext4_meta_trans_blocks(struct inode *inode, int lblocks, int pextents)
> int ret;
>
> /*
> - * How many index and lead blocks need to touch to map @lblocks
> + * How many index and leaf blocks need to touch to map @lblocks
> * logical blocks to @pextents physical extents?
> */
> idxblocks = ext4_index_trans_blocks(inode, lblocks, pextents);
> @@ -6193,7 +6193,7 @@ int ext4_meta_trans_blocks(struct inode *inode, int lblocks, int pextents)
> * Now let's see how many group bitmaps and group descriptors need
> * to account
> */
> - groups = idxblocks;
> + groups = idxblocks + pextents;
> gdpblocks = groups;
> if (groups > ngroups)
> groups = ngroups;
> --
> 2.46.1
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
