Re: [PATCH 5.10 CANDIDATE 7/8] xfs: consider shutdown in bmapbt cursor delete assert

[Dave Chinner <david@fromorbit.com>]

On Wed, Jun 01, 2022 at 01:45:46PM +0300, Amir Goldstein wrote:
> From: Brian Foster <bfoster@redhat.com>
> 
> commit 1cd738b13ae9b29e03d6149f0246c61f76e81fcf upstream.
> 
> The assert in xfs_btree_del_cursor() checks that the bmapbt block
> allocation field has been handled correctly before the cursor is
> freed. This field is used for accurate calculation of indirect block
> reservation requirements (for delayed allocations), for example.
> generic/019 reproduces a scenario where this assert fails because
> the filesystem has shutdown while in the middle of a bmbt record
> insertion. This occurs after a bmbt block has been allocated via the
> cursor but before the higher level bmap function (i.e.
> xfs_bmap_add_extent_hole_real()) completes and resets the field.
> 
> Update the assert to accommodate the transient state if the
> filesystem has shutdown. While here, clean up the indentation and
> comments in the function.
> 
> Signed-off-by: Brian Foster <bfoster@redhat.com>
> Reviewed-by: Darrick J. Wong <djwong@kernel.org>
> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> Signed-off-by: Amir Goldstein <amir73il@gmail.com>
> ---
>  fs/xfs/libxfs/xfs_btree.c | 33 ++++++++++++---------------------
>  1 file changed, 12 insertions(+), 21 deletions(-)

https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=56486f307100e8fc66efa2ebd8a71941fa10bf6f

-- 
Dave Chinner
david@fromorbit.com