From: Sidong Yang <realwakka@gmail.com>
Date: Sun, 6 Feb 2022 12:52:48 +0000
Subject: [PATCH] btrfs: qgroup: remove duplicated check in adding qgroup
relations
Git-commit: a8f6f619e44402f7005da79470835b98dc88450f
Patch-mainline: v5.18-rc1
References: bsc#1207158
Removes duplicated check when adding qgroup relations.
btrfs_add_qgroup_relations function adds relations by calling
add_relation_rb(). add_relation_rb() checks that member/parentid exists
in current qgroup_tree. But it already checked before calling the
function. It seems that we don't need to double check.
Add new function __add_relation_rb() that adds relations with
qgroup structures and makes old function use the new one. And it makes
btrfs_add_qgroup_relation() function work without double checks by
calling the new function.
Signed-off-by: Sidong Yang <realwakka@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add comments ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
---
fs/btrfs/qgroup.c | 41 ++++++++++++++++++++++++++++++++---------
1 file changed, 32 insertions(+), 9 deletions(-)
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index d437511ed354..a22b901ac25a 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -258,16 +258,19 @@ static int del_qgroup_rb(struct btrfs_fs_info *fs_info, u64 qgroupid)
return 0;
}
-/* must be called with qgroup_lock held */
-static int add_relation_rb(struct btrfs_fs_info *fs_info,
- u64 memberid, u64 parentid)
+/*
+ * Add relation specified by two qgroups.
+ *
+ * Must be called with qgroup_lock held.
+ *
+ * Return: 0 on success
+ * -ENOENT if one of the qgroups is NULL
+ * <0 other errors
+ */
+static int __add_relation_rb(struct btrfs_qgroup *member, struct btrfs_qgroup *parent)
{
- struct btrfs_qgroup *member;
- struct btrfs_qgroup *parent;
struct btrfs_qgroup_list *list;
- member = find_qgroup_rb(fs_info, memberid);
- parent = find_qgroup_rb(fs_info, parentid);
if (!member || !parent)
return -ENOENT;
@@ -283,7 +286,27 @@ static int add_relation_rb(struct btrfs_fs_info *fs_info,
return 0;
}
-/* must be called with qgroup_lock held */
+/*
+ * Add relation specified by two qgoup ids.
+ *
+ * Must be called with qgroup_lock held.
+ *
+ * Return: 0 on success
+ * -ENOENT if one of the ids does not exist
+ * <0 other errors
+ */
+static int add_relation_rb(struct btrfs_fs_info *fs_info, u64 memberid, u64 parentid)
+{
+ struct btrfs_qgroup *member;
+ struct btrfs_qgroup *parent;
+
+ member = find_qgroup_rb(fs_info, memberid);
+ parent = find_qgroup_rb(fs_info, parentid);
+
+ return __add_relation_rb(member, parent);
+}
+
+/* Must be called with qgroup_lock held */
static int del_relation_rb(struct btrfs_fs_info *fs_info,
u64 memberid, u64 parentid)
{
@@ -1457,7 +1480,7 @@ int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, u64 src,
}
spin_lock(&fs_info->qgroup_lock);
- ret = add_relation_rb(fs_info, src, dst);
+ ret = __add_relation_rb(member, parent);
if (ret < 0) {
spin_unlock(&fs_info->qgroup_lock);
goto out;
--
2.26.2