Re: [PATCH v2 2/4] xfs: factor out xfs_attr3_node_entry_remove

["Darrick J. Wong" <djwong@kernel.org>]

On Thu, Mar 12, 2026 at 04:57:58PM +0800, Long Li wrote:
> Factor out wrapper xfs_attr3_node_entry_remove function, which
> exported for external use.
> 
> Signed-off-by: Long Li <leo.lilong@huawei.com>
> ---
>  fs/xfs/libxfs/xfs_da_btree.c | 54 ++++++++++++++++++++++++++++--------
>  fs/xfs/libxfs/xfs_da_btree.h |  2 ++
>  2 files changed, 45 insertions(+), 11 deletions(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c
> index 766631f0562e..0b9fe3e4370d 100644
> --- a/fs/xfs/libxfs/xfs_da_btree.c
> +++ b/fs/xfs/libxfs/xfs_da_btree.c
> @@ -1506,21 +1506,20 @@ xfs_da3_fixhashpath(
>  }
>  
>  /*
> - * Remove an entry from an intermediate node.
> + * Internal implementation to remove an entry from an intermediate node.
>   */
>  STATIC void
> -xfs_da3_node_remove(
> -	struct xfs_da_state	*state,
> -	struct xfs_da_state_blk	*drop_blk)
> +__xfs_da3_node_remove(
> +	struct xfs_trans	*tp,
> +	struct xfs_inode	*dp,
> +	struct xfs_da_geometry  *geo,
> +	struct xfs_da_state_blk *drop_blk)
>  {
>  	struct xfs_da_intnode	*node;
>  	struct xfs_da3_icnode_hdr nodehdr;
>  	struct xfs_da_node_entry *btree;
>  	int			index;
>  	int			tmp;
> -	struct xfs_inode	*dp = state->args->dp;
> -
> -	trace_xfs_da_node_remove(state->args);
>  
>  	node = drop_blk->bp->b_addr;
>  	xfs_da3_node_hdr_from_disk(dp->i_mount, &nodehdr, node);
> @@ -1536,17 +1535,17 @@ xfs_da3_node_remove(
>  		tmp  = nodehdr.count - index - 1;
>  		tmp *= (uint)sizeof(xfs_da_node_entry_t);
>  		memmove(&btree[index], &btree[index + 1], tmp);
> -		xfs_trans_log_buf(state->args->trans, drop_blk->bp,
> +		xfs_trans_log_buf(tp, drop_blk->bp,
>  		    XFS_DA_LOGRANGE(node, &btree[index], tmp));
>  		index = nodehdr.count - 1;
>  	}
>  	memset(&btree[index], 0, sizeof(xfs_da_node_entry_t));
> -	xfs_trans_log_buf(state->args->trans, drop_blk->bp,
> +	xfs_trans_log_buf(tp, drop_blk->bp,
>  	    XFS_DA_LOGRANGE(node, &btree[index], sizeof(btree[index])));
>  	nodehdr.count -= 1;
>  	xfs_da3_node_hdr_to_disk(dp->i_mount, node, &nodehdr);
> -	xfs_trans_log_buf(state->args->trans, drop_blk->bp,
> -	    XFS_DA_LOGRANGE(node, &node->hdr, state->args->geo->node_hdr_size));
> +	xfs_trans_log_buf(tp, drop_blk->bp,
> +	    XFS_DA_LOGRANGE(node, &node->hdr, geo->node_hdr_size));
>  
>  	/*
>  	 * Copy the last hash value from the block to propagate upwards.
> @@ -1554,6 +1553,39 @@ xfs_da3_node_remove(
>  	drop_blk->hashval = be32_to_cpu(btree[index - 1].hashval);
>  }
>  
> +/*
> + * Remove an entry from an intermediate node.
> + */
> +STATIC void
> +xfs_da3_node_remove(
> +	struct xfs_da_state	*state,
> +	struct xfs_da_state_blk	*drop_blk)
> +{
> +	trace_xfs_da_node_remove(state->args);
> +
> +	__xfs_da3_node_remove(state->args->trans, state->args->dp,
> +			state->args->geo, drop_blk);
> +}
> +
> +/*
> + * Remove an entry from a node at the specified index, this is an exported
> + * wrapper for removing entries from intermediate nodes.

"exported" is confusing since in kernel-land that usually implies
EXPORT_SYMBOL_GPL(), which this clearly isn't.  You could trim this to

/*
 * Remove an entry from an intermediate attr node at the specified
 * index.
 */

With that touched up,
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>

--D


> + */
> +void
> +xfs_attr3_node_entry_remove(
> +	struct xfs_trans	*tp,
> +	struct xfs_inode	*dp,
> +	struct xfs_buf		*bp,
> +	int			index)
> +{
> +	struct xfs_da_state_blk blk = {
> +		.index		= index,
> +		.bp		= bp,
> +	};
> +
> +	__xfs_da3_node_remove(tp, dp, dp->i_mount->m_attr_geo, &blk);
> +}
> +
>  /*
>   * Unbalance the elements between two intermediate nodes,
>   * move all Btree elements from one node into another.
> diff --git a/fs/xfs/libxfs/xfs_da_btree.h b/fs/xfs/libxfs/xfs_da_btree.h
> index 354d5d65043e..afcf2d3c7a21 100644
> --- a/fs/xfs/libxfs/xfs_da_btree.h
> +++ b/fs/xfs/libxfs/xfs_da_btree.h
> @@ -184,6 +184,8 @@ int	xfs_da3_split(xfs_da_state_t *state);
>  int	xfs_da3_join(xfs_da_state_t *state);
>  void	xfs_da3_fixhashpath(struct xfs_da_state *state,
>  			    struct xfs_da_state_path *path_to_to_fix);
> +void	xfs_attr3_node_entry_remove(struct xfs_trans *tp, struct xfs_inode *dp,
> +			    struct xfs_buf *bp, int index);
>  
>  /*
>   * Routines used for finding things in the Btree.
> -- 
> 2.39.2
> 
>