Re: [PATCH v2] xfs: remove dfops param from high level dirname calls

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On Mon, Jul 02, 2018 at 01:37:38PM -0400, Brian Foster wrote:
> All callers of the directory create, rename and remove interfaces
> already associate the dfops with the transaction. Drop the dfops
> parameters in these calls in preparation for further cleanups in the
> layers below. This patch does not change behavior.
> 
> Signed-off-by: Brian Foster <bfoster@xxxxxxxxxx>
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>

Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

--D

> ---
> 
> v2:
> - Move asserts to function start.
> 
>  fs/xfs/libxfs/xfs_dir2.c | 17 +++++++-------
>  fs/xfs/libxfs/xfs_dir2.h |  9 +++-----
>  fs/xfs/xfs_inode.c       | 50 ++++++++++++++++++----------------------
>  fs/xfs/xfs_symlink.c     |  2 +-
>  4 files changed, 36 insertions(+), 42 deletions(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_dir2.c b/fs/xfs/libxfs/xfs_dir2.c
> index 59169aff30fe..c98250f0de50 100644
> --- a/fs/xfs/libxfs/xfs_dir2.c
> +++ b/fs/xfs/libxfs/xfs_dir2.c
> @@ -244,7 +244,6 @@ xfs_dir_createname(
>  	struct xfs_name		*name,
>  	xfs_ino_t		inum,		/* new entry inode number */
>  	xfs_fsblock_t		*first,		/* bmap's firstblock */
> -	struct xfs_defer_ops	*dfops,		/* bmap's freeblock list */
>  	xfs_extlen_t		total)		/* bmap's total block count */
>  {
>  	struct xfs_da_args	*args;
> @@ -252,6 +251,8 @@ xfs_dir_createname(
>  	int			v;		/* type-checking value */
>  
>  	ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
> +	ASSERT(tp->t_dfops || !first);
> +
>  	if (inum) {
>  		rval = xfs_dir_ino_validate(tp->t_mountp, inum);
>  		if (rval)
> @@ -270,11 +271,11 @@ xfs_dir_createname(
>  	args->hashval = dp->i_mount->m_dirnameops->hashname(name);
>  	args->inumber = inum;
>  	args->dp = dp;
> -	args->firstblock = first;
> -	args->dfops = dfops;
>  	args->total = total;
>  	args->whichfork = XFS_DATA_FORK;
>  	args->trans = tp;
> +	args->dfops = tp->t_dfops;
> +	args->firstblock = first;
>  	args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
>  	if (!inum)
>  		args->op_flags |= XFS_DA_OP_JUSTCHECK;
> @@ -421,7 +422,6 @@ xfs_dir_removename(
>  	struct xfs_name	*name,
>  	xfs_ino_t	ino,
>  	xfs_fsblock_t	*first,		/* bmap's firstblock */
> -	struct xfs_defer_ops	*dfops,		/* bmap's freeblock list */
>  	xfs_extlen_t	total)		/* bmap's total block count */
>  {
>  	struct xfs_da_args *args;
> @@ -429,6 +429,7 @@ xfs_dir_removename(
>  	int		v;		/* type-checking value */
>  
>  	ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
> +	ASSERT(tp->t_dfops);
>  	XFS_STATS_INC(dp->i_mount, xs_dir_remove);
>  
>  	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
> @@ -443,10 +444,10 @@ xfs_dir_removename(
>  	args->inumber = ino;
>  	args->dp = dp;
>  	args->firstblock = first;
> -	args->dfops = dfops;
>  	args->total = total;
>  	args->whichfork = XFS_DATA_FORK;
>  	args->trans = tp;
> +	args->dfops = tp->t_dfops;
>  
>  	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
>  		rval = xfs_dir2_sf_removename(args);
> @@ -483,7 +484,6 @@ xfs_dir_replace(
>  	struct xfs_name	*name,		/* name of entry to replace */
>  	xfs_ino_t	inum,		/* new inode number */
>  	xfs_fsblock_t	*first,		/* bmap's firstblock */
> -	struct xfs_defer_ops	*dfops,		/* bmap's freeblock list */
>  	xfs_extlen_t	total)		/* bmap's total block count */
>  {
>  	struct xfs_da_args *args;
> @@ -491,6 +491,7 @@ xfs_dir_replace(
>  	int		v;		/* type-checking value */
>  
>  	ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
> +	ASSERT(tp->t_dfops);
>  
>  	rval = xfs_dir_ino_validate(tp->t_mountp, inum);
>  	if (rval)
> @@ -508,10 +509,10 @@ xfs_dir_replace(
>  	args->inumber = inum;
>  	args->dp = dp;
>  	args->firstblock = first;
> -	args->dfops = dfops;
>  	args->total = total;
>  	args->whichfork = XFS_DATA_FORK;
>  	args->trans = tp;
> +	args->dfops = tp->t_dfops;
>  
>  	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
>  		rval = xfs_dir2_sf_replace(args);
> @@ -547,7 +548,7 @@ xfs_dir_canenter(
>  	xfs_inode_t	*dp,
>  	struct xfs_name	*name)		/* name of entry to add */
>  {
> -	return xfs_dir_createname(tp, dp, name, 0, NULL, NULL, 0);
> +	return xfs_dir_createname(tp, dp, name, 0, NULL, 0);
>  }
>  
>  /*
> diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h
> index ed385316c7dc..f203aebc07ed 100644
> --- a/fs/xfs/libxfs/xfs_dir2.h
> +++ b/fs/xfs/libxfs/xfs_dir2.h
> @@ -118,19 +118,16 @@ extern int xfs_dir_init(struct xfs_trans *tp, struct xfs_inode *dp,
>  				struct xfs_inode *pdp);
>  extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp,
>  				struct xfs_name *name, xfs_ino_t inum,
> -				xfs_fsblock_t *first,
> -				struct xfs_defer_ops *dfops, xfs_extlen_t tot);
> +				xfs_fsblock_t *first, xfs_extlen_t tot);
>  extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp,
>  				struct xfs_name *name, xfs_ino_t *inum,
>  				struct xfs_name *ci_name);
>  extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp,
>  				struct xfs_name *name, xfs_ino_t ino,
> -				xfs_fsblock_t *first,
> -				struct xfs_defer_ops *dfops, xfs_extlen_t tot);
> +				xfs_fsblock_t *first, xfs_extlen_t tot);
>  extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp,
>  				struct xfs_name *name, xfs_ino_t inum,
> -				xfs_fsblock_t *first,
> -				struct xfs_defer_ops *dfops, xfs_extlen_t tot);
> +				xfs_fsblock_t *first, xfs_extlen_t tot);
>  extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp,
>  				struct xfs_name *name);
>  
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index f5649a023d46..e1bc686b70b4 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -1225,8 +1225,8 @@ xfs_create(
>  	xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
>  	unlock_dp_on_error = false;
>  
> -	error = xfs_dir_createname(tp, dp, name, ip->i_ino,
> -					&first_block, &dfops, resblks ?
> +	error = xfs_dir_createname(tp, dp, name, ip->i_ino, &first_block,
> +				   resblks ?
>  					resblks - XFS_IALLOC_SPACE_RES(mp) : 0);
>  	if (error) {
>  		ASSERT(error != -ENOSPC);
> @@ -1464,7 +1464,7 @@ xfs_link(
>  	}
>  
>  	error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino,
> -					&first_block, &dfops, resblks);
> +				   &first_block, resblks);
>  	if (error)
>  		goto error_return;
>  	xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
> @@ -2659,8 +2659,8 @@ xfs_remove(
>  
>  	xfs_defer_init(&dfops, &first_block);
>  	tp->t_dfops = &dfops;
> -	error = xfs_dir_removename(tp, dp, name, ip->i_ino,
> -					&first_block, &dfops, resblks);
> +	error = xfs_dir_removename(tp, dp, name, ip->i_ino, &first_block,
> +				   resblks);
>  	if (error) {
>  		ASSERT(error != -ENOENT);
>  		goto out_bmap_cancel;
> @@ -2748,9 +2748,9 @@ xfs_sort_for_rename(
>  
>  static int
>  xfs_finish_rename(
> -	struct xfs_trans	*tp,
> -	struct xfs_defer_ops	*dfops)
> +	struct xfs_trans	*tp)
>  {
> +	struct xfs_defer_ops	*dfops = tp->t_dfops;
>  	int			error;
>  
>  	/*
> @@ -2784,7 +2784,6 @@ xfs_cross_rename(
>  	struct xfs_inode	*dp2,
>  	struct xfs_name		*name2,
>  	struct xfs_inode	*ip2,
> -	struct xfs_defer_ops	*dfops,
>  	xfs_fsblock_t		*first_block,
>  	int			spaceres)
>  {
> @@ -2794,16 +2793,14 @@ xfs_cross_rename(
>  	int		dp2_flags = 0;
>  
>  	/* Swap inode number for dirent in first parent */
> -	error = xfs_dir_replace(tp, dp1, name1,
> -				ip2->i_ino,
> -				first_block, dfops, spaceres);
> +	error = xfs_dir_replace(tp, dp1, name1, ip2->i_ino, first_block,
> +				spaceres);
>  	if (error)
>  		goto out_trans_abort;
>  
>  	/* Swap inode number for dirent in second parent */
> -	error = xfs_dir_replace(tp, dp2, name2,
> -				ip1->i_ino,
> -				first_block, dfops, spaceres);
> +	error = xfs_dir_replace(tp, dp2, name2, ip1->i_ino, first_block,
> +				spaceres);
>  	if (error)
>  		goto out_trans_abort;
>  
> @@ -2818,7 +2815,7 @@ xfs_cross_rename(
>  		if (S_ISDIR(VFS_I(ip2)->i_mode)) {
>  			error = xfs_dir_replace(tp, ip2, &xfs_name_dotdot,
>  						dp1->i_ino, first_block,
> -						dfops, spaceres);
> +						spaceres);
>  			if (error)
>  				goto out_trans_abort;
>  
> @@ -2845,7 +2842,7 @@ xfs_cross_rename(
>  		if (S_ISDIR(VFS_I(ip1)->i_mode)) {
>  			error = xfs_dir_replace(tp, ip1, &xfs_name_dotdot,
>  						dp2->i_ino, first_block,
> -						dfops, spaceres);
> +						spaceres);
>  			if (error)
>  				goto out_trans_abort;
>  
> @@ -2884,10 +2881,10 @@ xfs_cross_rename(
>  	}
>  	xfs_trans_ichgtime(tp, dp1, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
>  	xfs_trans_log_inode(tp, dp1, XFS_ILOG_CORE);
> -	return xfs_finish_rename(tp, dfops);
> +	return xfs_finish_rename(tp);
>  
>  out_trans_abort:
> -	xfs_defer_cancel(dfops);
> +	xfs_defer_cancel(tp->t_dfops);
>  	xfs_trans_cancel(tp);
>  	return error;
>  }
> @@ -3032,7 +3029,7 @@ xfs_rename(
>  	if (flags & RENAME_EXCHANGE)
>  		return xfs_cross_rename(tp, src_dp, src_name, src_ip,
>  					target_dp, target_name, target_ip,
> -					&dfops, &first_block, spaceres);
> +					&first_block, spaceres);
>  
>  	/*
>  	 * Set up the target.
> @@ -3054,7 +3051,7 @@ xfs_rename(
>  		 */
>  		error = xfs_dir_createname(tp, target_dp, target_name,
>  						src_ip->i_ino, &first_block,
> -						&dfops, spaceres);
> +						spaceres);
>  		if (error)
>  			goto out_bmap_cancel;
>  
> @@ -3093,8 +3090,7 @@ xfs_rename(
>  		 * name at the destination directory, remove it first.
>  		 */
>  		error = xfs_dir_replace(tp, target_dp, target_name,
> -					src_ip->i_ino,
> -					&first_block, &dfops, spaceres);
> +					src_ip->i_ino, &first_block, spaceres);
>  		if (error)
>  			goto out_bmap_cancel;
>  
> @@ -3128,8 +3124,8 @@ xfs_rename(
>  		 * directory.
>  		 */
>  		error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot,
> -					target_dp->i_ino,
> -					&first_block, &dfops, spaceres);
> +					target_dp->i_ino, &first_block,
> +					spaceres);
>  		ASSERT(error != -EEXIST);
>  		if (error)
>  			goto out_bmap_cancel;
> @@ -3168,10 +3164,10 @@ xfs_rename(
>  	 */
>  	if (wip) {
>  		error = xfs_dir_replace(tp, src_dp, src_name, wip->i_ino,
> -					&first_block, &dfops, spaceres);
> +					&first_block, spaceres);
>  	} else
>  		error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino,
> -					   &first_block, &dfops, spaceres);
> +					   &first_block, spaceres);
>  	if (error)
>  		goto out_bmap_cancel;
>  
> @@ -3206,7 +3202,7 @@ xfs_rename(
>  	if (new_parent)
>  		xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE);
>  
> -	error = xfs_finish_rename(tp, &dfops);
> +	error = xfs_finish_rename(tp);
>  	if (wip)
>  		IRELE(wip);
>  	return error;
> diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
> index 44335bdebea2..e347a3db018f 100644
> --- a/fs/xfs/xfs_symlink.c
> +++ b/fs/xfs/xfs_symlink.c
> @@ -339,7 +339,7 @@ xfs_symlink(
>  	 * Create the directory entry for the symlink.
>  	 */
>  	error = xfs_dir_createname(tp, dp, link_name, ip->i_ino,
> -					&first_block, &dfops, resblks);
> +				   &first_block, resblks);
>  	if (error)
>  		goto out_bmap_cancel;
>  	xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
> -- 
> 2.17.1
> 
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