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From: Brian Foster <bfoster@redhat.com>
To: Allison Henderson <allison.henderson@oracle.com>
Cc: linux-xfs@vger.kernel.org
Subject: Re: [PATCH v15 04/22] xfs: Hoist xfs_attr_set_shortform
Date: Wed, 24 Feb 2021 10:04:11 -0500	[thread overview]
Message-ID: <20210224150411.GE981777@bfoster> (raw)
In-Reply-To: <20210218165348.4754-5-allison.henderson@oracle.com>

On Thu, Feb 18, 2021 at 09:53:30AM -0700, Allison Henderson wrote:
> This patch hoists xfs_attr_set_shortform into the calling function. This
> will help keep all state management code in the same scope.
> 
> Signed-off-by: Allison Henderson <allison.henderson@oracle.com>
> ---

LGTM:

Reviewed-by: Brian Foster <bfoster@redhat.com>

>  fs/xfs/libxfs/xfs_attr.c | 81 ++++++++++++++++--------------------------------
>  1 file changed, 27 insertions(+), 54 deletions(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> index 3cf76e2..a064c5b 100644
> --- a/fs/xfs/libxfs/xfs_attr.c
> +++ b/fs/xfs/libxfs/xfs_attr.c
> @@ -217,53 +217,6 @@ xfs_attr_is_shortform(
>  }
>  
>  /*
> - * Attempts to set an attr in shortform, or converts short form to leaf form if
> - * there is not enough room.  If the attr is set, the transaction is committed
> - * and set to NULL.
> - */
> -STATIC int
> -xfs_attr_set_shortform(
> -	struct xfs_da_args	*args,
> -	struct xfs_buf		**leaf_bp)
> -{
> -	struct xfs_inode	*dp = args->dp;
> -	int			error, error2 = 0;
> -
> -	/*
> -	 * Try to add the attr to the attribute list in the inode.
> -	 */
> -	error = xfs_attr_try_sf_addname(dp, args);
> -	if (error != -ENOSPC) {
> -		error2 = xfs_trans_commit(args->trans);
> -		args->trans = NULL;
> -		return error ? error : error2;
> -	}
> -	/*
> -	 * It won't fit in the shortform, transform to a leaf block.  GROT:
> -	 * another possible req'mt for a double-split btree op.
> -	 */
> -	error = xfs_attr_shortform_to_leaf(args, leaf_bp);
> -	if (error)
> -		return error;
> -
> -	/*
> -	 * Prevent the leaf buffer from being unlocked so that a concurrent AIL
> -	 * push cannot grab the half-baked leaf buffer and run into problems
> -	 * with the write verifier. Once we're done rolling the transaction we
> -	 * can release the hold and add the attr to the leaf.
> -	 */
> -	xfs_trans_bhold(args->trans, *leaf_bp);
> -	error = xfs_defer_finish(&args->trans);
> -	xfs_trans_bhold_release(args->trans, *leaf_bp);
> -	if (error) {
> -		xfs_trans_brelse(args->trans, *leaf_bp);
> -		return error;
> -	}
> -
> -	return 0;
> -}
> -
> -/*
>   * Set the attribute specified in @args.
>   */
>  int
> @@ -272,7 +225,7 @@ xfs_attr_set_args(
>  {
>  	struct xfs_inode	*dp = args->dp;
>  	struct xfs_buf          *leaf_bp = NULL;
> -	int			error = 0;
> +	int			error2, error = 0;
>  
>  	/*
>  	 * If the attribute list is already in leaf format, jump straight to
> @@ -281,16 +234,36 @@ xfs_attr_set_args(
>  	 * again.
>  	 */
>  	if (xfs_attr_is_shortform(dp)) {
> +		/*
> +		 * Try to add the attr to the attribute list in the inode.
> +		 */
> +		error = xfs_attr_try_sf_addname(dp, args);
> +		if (error != -ENOSPC) {
> +			error2 = xfs_trans_commit(args->trans);
> +			args->trans = NULL;
> +			return error ? error : error2;
> +		}
> +
> +		/*
> +		 * It won't fit in the shortform, transform to a leaf block.
> +		 * GROT: another possible req'mt for a double-split btree op.
> +		 */
> +		error = xfs_attr_shortform_to_leaf(args, &leaf_bp);
> +		if (error)
> +			return error;
>  
>  		/*
> -		 * If the attr was successfully set in shortform, the
> -		 * transaction is committed and set to NULL.  Otherwise, is it
> -		 * converted from shortform to leaf, and the transaction is
> -		 * retained.
> +		 * Prevent the leaf buffer from being unlocked so that a
> +		 * concurrent AIL push cannot grab the half-baked leaf buffer
> +		 * and run into problems with the write verifier.
>  		 */
> -		error = xfs_attr_set_shortform(args, &leaf_bp);
> -		if (error || !args->trans)
> +		xfs_trans_bhold(args->trans, leaf_bp);
> +		error = xfs_defer_finish(&args->trans);
> +		xfs_trans_bhold_release(args->trans, leaf_bp);
> +		if (error) {
> +			xfs_trans_brelse(args->trans, leaf_bp);
>  			return error;
> +		}
>  	}
>  
>  	if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
> -- 
> 2.7.4
> 


  reply	other threads:[~2021-02-24 16:05 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-18 16:53 [PATCH v15 00/22] xfs: Delayed Attributes Allison Henderson
2021-02-18 16:53 ` [PATCH v15 01/22] xfs: Add helper xfs_attr_node_remove_step Allison Henderson
2021-02-24 15:03   ` Brian Foster
2021-02-25  6:17     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 02/22] xfs: Add xfs_attr_node_remove_cleanup Allison Henderson
2021-02-24 15:03   ` Brian Foster
2021-02-25  6:17     ` Allison Henderson
2021-02-26  3:00   ` Darrick J. Wong
2021-02-27  0:48     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 03/22] xfs: Hoist transaction handling in xfs_attr_node_remove_step Allison Henderson
2021-02-24 15:04   ` Brian Foster
2021-02-25  6:18     ` Allison Henderson
2021-02-26  3:02   ` Darrick J. Wong
2021-02-27  0:48     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 04/22] xfs: Hoist xfs_attr_set_shortform Allison Henderson
2021-02-24 15:04   ` Brian Foster [this message]
2021-02-25  6:18     ` Allison Henderson
2021-02-26  3:03   ` Darrick J. Wong
2021-02-27  0:48     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 05/22] xfs: Add helper xfs_attr_set_fmt Allison Henderson
2021-02-24 15:04   ` Brian Foster
2021-02-25  6:18     ` Allison Henderson
2021-02-26  3:07   ` Darrick J. Wong
2021-02-27  0:49     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 06/22] xfs: Separate xfs_attr_node_addname and xfs_attr_node_addname_work Allison Henderson
2021-02-24 15:04   ` Brian Foster
2021-02-25  6:18     ` Allison Henderson
2021-02-26  4:02   ` Darrick J. Wong
2021-02-27  0:54     ` Allison Henderson
2021-03-01 18:00       ` Darrick J. Wong
2021-03-02  8:26         ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 07/22] xfs: Add helper xfs_attr_node_addname_find_attr Allison Henderson
2021-02-24 15:04   ` Brian Foster
2021-02-25  6:18     ` Allison Henderson
2021-02-26  4:06   ` Darrick J. Wong
2021-02-27  0:54     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 08/22] xfs: Hoist xfs_attr_node_addname Allison Henderson
2021-02-24 18:42   ` Brian Foster
2021-02-25  6:19     ` Allison Henderson
2021-03-01 18:05   ` Darrick J. Wong
2021-03-02  8:26     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 09/22] xfs: Hoist xfs_attr_leaf_addname Allison Henderson
2021-02-24 18:42   ` Brian Foster
2021-02-25  6:19     ` Allison Henderson
2021-02-25 14:20       ` Brian Foster
2021-03-01 18:19   ` Darrick J. Wong
2021-03-02  8:26     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 10/22] xfs: Hoist node transaction handling Allison Henderson
2021-02-24 18:43   ` Brian Foster
2021-02-25  6:20     ` Allison Henderson
2021-03-01 18:20   ` Darrick J. Wong
2021-03-02  8:26     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 11/22] xfs: Add delay ready attr remove routines Allison Henderson
2021-02-24 18:45   ` Brian Foster
2021-02-25  7:01     ` Allison Henderson
2021-02-25 14:22       ` Brian Foster
2021-02-25 22:28         ` Allison Henderson
2021-02-28 15:39           ` Brian Foster
2021-03-02  8:26             ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 12/22] xfs: Add delay ready attr set routines Allison Henderson
2021-03-02  1:39   ` Darrick J. Wong
2021-02-18 16:53 ` [PATCH v15 13/22] xfs: Add state machine tracepoints Allison Henderson
2021-02-26  5:06   ` Darrick J. Wong
2021-02-27  0:57     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 14/22] xfs: Rename __xfs_attr_rmtval_remove Allison Henderson
2021-02-18 16:53 ` [PATCH v15 15/22] xfs: Handle krealloc errors in xlog_recover_add_to_cont_trans Allison Henderson
2021-02-26  5:06   ` Darrick J. Wong
2021-02-27  0:57     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 16/22] xfs: Set up infastructure for deferred attribute operations Allison Henderson
2021-02-26  4:58   ` Darrick J. Wong
2021-02-27  0:56     ` Allison Henderson
2021-03-02  7:13       ` Allison Henderson
2021-03-03 11:50         ` Brian Foster
2021-02-18 16:53 ` [PATCH v15 17/22] xfs: Skip flip flags for delayed attrs Allison Henderson
2021-02-26  5:02   ` Darrick J. Wong
2021-02-27  0:56     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 18/22] xfs: Add xfs_attr_set_deferred and xfs_attr_remove_deferred Allison Henderson
2021-02-26  5:00   ` Darrick J. Wong
2021-02-27  0:57     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 19/22] xfs: Remove unused xfs_attr_*_args Allison Henderson
2021-02-26  4:58   ` Darrick J. Wong
2021-02-27  0:57     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 20/22] xfs: Add delayed attributes error tag Allison Henderson
2021-02-18 16:53 ` [PATCH v15 21/22] xfs: Add delattr mount option Allison Henderson
2021-02-26  4:29   ` Darrick J. Wong
2021-02-27  0:55     ` Allison Henderson
2021-02-18 16:53 ` [PATCH v15 22/22] xfs: Merge xfs_delattr_context into xfs_attr_item Allison Henderson

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