[PATCH 5/6] btrfs: split thread with trans to use btrfs_setxattr

[Anand Jain <anand.jain@oracle.com>]

When the parent thread has already created the transaction call
btrfs_setxattr() directly. Also adds assert in btrfs_setxattr()
to check if trans is not null.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 fs/btrfs/acl.c   |  6 +++++-
 fs/btrfs/props.c | 34 ++++++++++++++++++++++++----------
 fs/btrfs/xattr.c |  6 ++++--
 3 files changed, 33 insertions(+), 13 deletions(-)

diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index d3b04c6abc61..7fe6551bc59b 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -93,7 +93,11 @@ static int __btrfs_set_acl(struct btrfs_trans_handle *trans,
 			goto out;
 	}
 
-	ret = btrfs_setxattr_trans(trans, inode, name, value, size, 0);
+	if (trans)
+		ret = btrfs_setxattr(trans, inode, name, value, size, 0);
+	else
+		ret = btrfs_setxattr_trans(NULL, inode, name, value, size, 0);
+
 out:
 	kfree(value);
 
diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c
index 61ced0ebb5ba..a73c1bdc7b05 100644
--- a/fs/btrfs/props.c
+++ b/fs/btrfs/props.c
@@ -70,8 +70,13 @@ static int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
 		return -EINVAL;
 
 	if (value_len == 0) {
-		ret = btrfs_setxattr_trans(trans, inode, handler->xattr_name,
-					   NULL, 0, flags);
+		if (trans)
+			ret = btrfs_setxattr(trans, inode, handler->xattr_name,
+					     NULL, 0, flags);
+		else
+			ret = btrfs_setxattr_trans(NULL, inode,
+						   handler->xattr_name, NULL, 0,
+						   flags);
 		if (ret)
 			return ret;
 
@@ -84,14 +89,23 @@ static int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
 	ret = handler->validate(value, value_len);
 	if (ret)
 		return ret;
-	ret = btrfs_setxattr_trans(trans, inode, handler->xattr_name,
-				   value, value_len, flags);
+	if (trans)
+		ret = btrfs_setxattr(trans, inode, handler->xattr_name, value,
+				     value_len, flags);
+	else
+		ret = btrfs_setxattr_trans(NULL, inode, handler->xattr_name,
+					   value, value_len, flags);
+
 	if (ret)
 		return ret;
 	ret = handler->apply(inode, value, value_len);
 	if (ret) {
-		btrfs_setxattr_trans(trans, inode, handler->xattr_name,
-				     NULL, 0, flags);
+		if (trans)
+			btrfs_setxattr(trans, inode, handler->xattr_name, NULL,
+				       0, flags);
+		else
+			btrfs_setxattr_trans(NULL, inode, handler->xattr_name,
+					     NULL, 0, flags);
 		return ret;
 	}
 
@@ -358,13 +372,13 @@ static int inherit_props(struct btrfs_trans_handle *trans,
 		if (ret)
 			return ret;
 
-		ret = btrfs_setxattr_trans(trans, inode, h->xattr_name, value,
-					   strlen(value), 0);
+		ret = btrfs_setxattr(trans, inode, h->xattr_name, value,
+				     strlen(value), 0);
 		if (!ret) {
 			ret = h->apply(inode, value, strlen(value));
 			if (ret)
-				btrfs_setxattr_trans(trans, inode, h->xattr_name,
-						     NULL, 0, 0);
+				btrfs_setxattr(trans, inode, h->xattr_name,
+					       NULL, 0, 0);
 			else
 				set_bit(BTRFS_INODE_HAS_PROPS,
 					&BTRFS_I(inode)->runtime_flags);
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 4c447b1f32e5..623d508f21a6 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -86,6 +86,8 @@ int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode,
 	size_t name_len = strlen(name);
 	int ret = 0;
 
+	ASSERT(trans);
+
 	if (name_len + size > BTRFS_MAX_XATTR_SIZE(root->fs_info))
 		return -ENOSPC;
 
@@ -437,8 +439,8 @@ static int btrfs_initxattrs(struct inode *inode,
 		}
 		strcpy(name, XATTR_SECURITY_PREFIX);
 		strcpy(name + XATTR_SECURITY_PREFIX_LEN, xattr->name);
-		err = btrfs_setxattr_trans(trans, inode, name, xattr->value,
-					   xattr->value_len, 0);
+		err = btrfs_setxattr(trans, inode, name, xattr->value,
+				     xattr->value_len, 0);
 		kfree(name);
 		if (err < 0)
 			break;
-- 
2.17.1