Re: [PATCH v3 2/3] xfs: enable xfs_trans_cancel() to report and error code

[Christoph Hellwig <hch@lst.de>]

On Thu, Sep 17, 2026 at 12:35:47PM +0200, cem@kernel.org wrote:
> From: Carlos Maiolino <cem@kernel.org>
> 
> Once in a while it's useful to know exactly what kind of error caused a
> transaction to be cancelled.
> Enable xfs_trans_cancel() to receive an error code to be reported.
> 
> Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
> Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
> ---
> V3:
> 	- Kill typedef from __xfs_trans_cancel
> 	- Remove uneeded wrap of parameter 0
> V2:
> 	- Parenthesize macro parameters
> 
>  fs/xfs/xfs_trans.c | 8 +++++---
>  fs/xfs/xfs_trans.h | 6 +++++-
>  2 files changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
> index 5c522790e5be..395c896673fe 100644
> --- a/fs/xfs/xfs_trans.c
> +++ b/fs/xfs/xfs_trans.c
> @@ -943,8 +943,9 @@ xfs_trans_commit(
>   * xfs_trans_commit().
>   */
>  void
> -xfs_trans_cancel(
> -	struct xfs_trans	*tp)
> +__xfs_trans_cancel(
> +	struct xfs_trans	*tp,
> +	int			error)
>  {
>  	struct xfs_mount	*mp = tp->t_mountp;
>  	struct xlog		*log = mp->m_log;
> @@ -971,7 +972,8 @@ xfs_trans_cancel(
>  	 * here.
>  	 */
>  	if (dirty && !xfs_is_shutdown(mp)) {
> -		XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW, 0, mp);
> +		XFS_ERROR_REPORT("xfs_trans_cancel", XFS_ERRLEVEL_LOW,
> +				 error, mp);
>  		xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
>  	}
>  #ifdef DEBUG
> diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
> index eb83c5dac032..36a49622b870 100644
> --- a/fs/xfs/xfs_trans.h
> +++ b/fs/xfs/xfs_trans.h
> @@ -213,6 +213,11 @@ xfs_trans_read_buf(
>  				      flags, bpp, ops);
>  }
>  
> +void __xfs_trans_cancel(struct xfs_trans *, int);
> +
> +#define xfs_trans_cancel(tp) __xfs_trans_cancel((tp), 0)
> +#define xfs_trans_cancel_error(tp, error) __xfs_trans_cancel((tp), (error))

Can we turn these into inlines instead of macros?

And do away with the pointless __xfs_trans_cancel, just implement
xfs_trans_cancel_error in xfs_trans.c, and wrap xfs_trans_cancel around
it.