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authorDavid Sterba <dsterba@suse.com>2020-05-15 20:35:55 +0300
committerDavid Sterba <dsterba@suse.com>2020-05-25 12:25:36 +0300
commit56e9357a1e8167134388d4c70654795353765c7b (patch)
treee89265fd992d94c54fffb639cf4ee39bd268cfdb /fs/btrfs/uuid-tree.c
parent1dae7e0e58b484eaa43d530f211098fdeeb0f404 (diff)
downloadlinux-56e9357a1e8167134388d4c70654795353765c7b.tar.xz
btrfs: simplify root lookup by id
The main function to lookup a root by its id btrfs_get_fs_root takes the whole key, while only using the objectid. The value of offset is preset to (u64)-1 but not actually used until btrfs_find_root that does the actual search. Switch btrfs_get_fs_root to use only objectid and remove all local variables that existed just for the lookup. The actual key for search is set up in btrfs_get_fs_root, reusing another key variable. Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/uuid-tree.c')
-rw-r--r--fs/btrfs/uuid-tree.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/fs/btrfs/uuid-tree.c b/fs/btrfs/uuid-tree.c
index 76671a6bcb61..28525ad7ff8c 100644
--- a/fs/btrfs/uuid-tree.c
+++ b/fs/btrfs/uuid-tree.c
@@ -257,7 +257,6 @@ out:
static int btrfs_check_uuid_tree_entry(struct btrfs_fs_info *fs_info,
u8 *uuid, u8 type, u64 subvolid)
{
- struct btrfs_key key;
int ret = 0;
struct btrfs_root *subvol_root;
@@ -265,10 +264,7 @@ static int btrfs_check_uuid_tree_entry(struct btrfs_fs_info *fs_info,
type != BTRFS_UUID_KEY_RECEIVED_SUBVOL)
goto out;
- key.objectid = subvolid;
- key.type = BTRFS_ROOT_ITEM_KEY;
- key.offset = (u64)-1;
- subvol_root = btrfs_get_fs_root(fs_info, &key, true);
+ subvol_root = btrfs_get_fs_root(fs_info, subvolid, true);
if (IS_ERR(subvol_root)) {
ret = PTR_ERR(subvol_root);
if (ret == -ENOENT)