[PATCH v14 10/15] xfs: Skip flip flags for delayed attrs

[Allison Henderson <allison.henderson@xxxxxxxxxx>]

This is a clean up patch that skips the flip flag logic for delayed attr
renames.  Since the log replay keeps the inode locked, we do not need to
worry about race windows with attr lookups.  So we can skip over
flipping the flag and the extra transaction roll for it

Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_attr.c      | 43 ++++++++++++++++++++++++-------------------
 fs/xfs/libxfs/xfs_attr_leaf.c |  3 ++-
 2 files changed, 26 insertions(+), 20 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index d108866..99f6539 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -805,6 +805,7 @@ xfs_attr_leaf_addname(
 	struct xfs_buf			*bp = NULL;
 	int				error, forkoff;
 	struct xfs_inode		*dp = args->dp;
+	struct xfs_mount		*mp = args->dp->i_mount;
 
 	/* State machine switch */
 	switch (dac->dela_state) {
@@ -870,15 +871,17 @@ xfs_attr_leaf_addname(
 	 * In a separate transaction, set the incomplete flag on the "old" attr
 	 * and clear the incomplete flag on the "new" attr.
 	 */
-	error = xfs_attr3_leaf_flipflags(args);
-	if (error)
-		return error;
-	/*
-	 * Commit the flag value change and start the next trans in series.
-	 */
-	dac->dela_state = XFS_DAS_FLIP_LFLAG;
-	trace_xfs_das_state_return(dac->dela_state);
-	return -EAGAIN;
+	if (!xfs_hasdelattr(mp)) {
+		error = xfs_attr3_leaf_flipflags(args);
+		if (error)
+			return error;
+		/*
+		 * Commit the flag value change and start the next trans in series.
+		 */
+		dac->dela_state = XFS_DAS_FLIP_LFLAG;
+		trace_xfs_das_state_return(dac->dela_state);
+		return -EAGAIN;
+	}
 das_flip_flag:
 	/*
 	 * Dismantle the "old" attribute/value pair by removing a "remote" value
@@ -1077,6 +1080,7 @@ xfs_attr_node_addname(
 	struct xfs_da_state_blk		*blk;
 	int				retval = 0;
 	int				error = 0;
+	struct xfs_mount		*mp = args->dp->i_mount;
 
 	trace_xfs_attr_node_addname(args);
 
@@ -1238,15 +1242,17 @@ xfs_attr_node_addname(
 	 * In a separate transaction, set the incomplete flag on the "old" attr
 	 * and clear the incomplete flag on the "new" attr.
 	 */
-	error = xfs_attr3_leaf_flipflags(args);
-	if (error)
-		goto out;
-	/*
-	 * Commit the flag value change and start the next trans in series
-	 */
-	dac->dela_state = XFS_DAS_FLIP_NFLAG;
-	trace_xfs_das_state_return(dac->dela_state);
-	return -EAGAIN;
+	if (!xfs_hasdelattr(mp)) {
+		error = xfs_attr3_leaf_flipflags(args);
+		if (error)
+			goto out;
+		/*
+		 * Commit the flag value change and start the next trans in series
+		 */
+		dac->dela_state = XFS_DAS_FLIP_NFLAG;
+		trace_xfs_das_state_return(dac->dela_state);
+		return -EAGAIN;
+	}
 das_flip_flag:
 	/*
 	 * Dismantle the "old" attribute/value pair by removing a "remote" value
@@ -1275,7 +1281,6 @@ xfs_attr_node_addname(
 	 * Re-find the "old" attribute entry after any split ops. The INCOMPLETE
 	 * flag means that we will find the "old" attr, not the "new" one.
 	 */
-	args->attr_filter |= XFS_ATTR_INCOMPLETE;
 	state = xfs_da_state_alloc(args);
 	state->inleaf = 0;
 	error = xfs_da3_node_lookup_int(state, &retval);
diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
index 3780141..ec707bd 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -1486,7 +1486,8 @@ xfs_attr3_leaf_add_work(
 	if (tmp)
 		entry->flags |= XFS_ATTR_LOCAL;
 	if (args->op_flags & XFS_DA_OP_RENAME) {
-		entry->flags |= XFS_ATTR_INCOMPLETE;
+		if (!xfs_hasdelattr(mp))
+			entry->flags |= XFS_ATTR_INCOMPLETE;
 		if ((args->blkno2 == args->blkno) &&
 		    (args->index2 <= args->index)) {
 			args->index2++;
-- 
2.7.4