Re: [PATCH v2 12/18] xfs: Factor out xfs_attr_rmtval_remove_value

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On Fri, Aug 09, 2019 at 02:37:20PM -0700, Allison Collins wrote:
> Because new delayed attribute routines cannot roll
> transactions, we carve off the parts of
> xfs_attr_rmtval_remove that we can use.  This will help to
> reduce repetitive code later when we introduce delayed
> attributes.
> 
> Signed-off-by: Allison Collins <allison.henderson@xxxxxxxxxx>
> ---
>  fs/xfs/libxfs/xfs_attr_remote.c | 25 +++++++++++++++++++------
>  fs/xfs/libxfs/xfs_attr_remote.h |  1 +
>  2 files changed, 20 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c
> index c421412..f030365 100644
> --- a/fs/xfs/libxfs/xfs_attr_remote.c
> +++ b/fs/xfs/libxfs/xfs_attr_remote.c
> @@ -586,19 +586,14 @@ xfs_attr_rmtval_set_value(
>  	return 0;
>  }
>  
> -/*
> - * Remove the value associated with an attribute by deleting the
> - * out-of-line buffer that it is stored on.
> - */
>  int
> -xfs_attr_rmtval_remove(
> +xfs_attr_rmtval_remove_value(

This function invalidates the incore buffers, right?  Since _remove
below still does the actual bunmapi work to unmap blocks from the attr
fork?  Would this be better named xfs_attr_rmtval_invalidate()?

>  	struct xfs_da_args	*args)
>  {
>  	struct xfs_mount	*mp = args->dp->i_mount;
>  	xfs_dablk_t		lblkno;
>  	int			blkcnt;
>  	int			error;
> -	int			done;
>  
>  	trace_xfs_attr_rmtval_remove(args);

Leave this in xfs_attr_rmtval_remove.

--D

>  
> @@ -642,7 +637,25 @@ xfs_attr_rmtval_remove(
>  		lblkno += map.br_blockcount;
>  		blkcnt -= map.br_blockcount;
>  	}
> +	return 0;
> +}
>  
> +/*
> + * Remove the value associated with an attribute by deleting the
> + * out-of-line buffer that it is stored on.
> + */
> +int
> +xfs_attr_rmtval_remove(
> +	struct xfs_da_args      *args)
> +{
> +	xfs_dablk_t		lblkno;
> +	int			blkcnt;
> +	int			error = 0;
> +	int			done = 0;
> +
> +	error = xfs_attr_rmtval_remove_value(args);
> +	if (error)
> +		return error;
>  	/*
>  	 * Keep de-allocating extents until the remote-value region is gone.
>  	 */
> diff --git a/fs/xfs/libxfs/xfs_attr_remote.h b/fs/xfs/libxfs/xfs_attr_remote.h
> index 2a73cd9..9a58a23 100644
> --- a/fs/xfs/libxfs/xfs_attr_remote.h
> +++ b/fs/xfs/libxfs/xfs_attr_remote.h
> @@ -11,6 +11,7 @@ int xfs_attr3_rmt_blocks(struct xfs_mount *mp, int attrlen);
>  int xfs_attr_rmtval_get(struct xfs_da_args *args);
>  int xfs_attr_rmtval_set(struct xfs_da_args *args);
>  int xfs_attr_rmtval_remove(struct xfs_da_args *args);
> +int xfs_attr_rmtval_remove_value(struct xfs_da_args *args);
>  int xfs_attr_rmtval_set_value(struct xfs_da_args *args);
>  int xfs_attr_rmt_find_hole(struct xfs_da_args *args, int *blkcnt,
>  			   xfs_fileoff_t *lfileoff);
> -- 
> 2.7.4
> 



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