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| author | David Sterba <dsterba@suse.com> | 2020-05-15 20:35:55 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-05-25 12:25:36 +0300 |
| commit | 56e9357a1e8167134388d4c70654795353765c7b (patch) | |
| tree | e89265fd992d94c54fffb639cf4ee39bd268cfdb /fs/btrfs/backref.c | |
| parent | 1dae7e0e58b484eaa43d530f211098fdeeb0f404 (diff) | |
| download | linux-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/backref.c')
| -rw-r--r-- | fs/btrfs/backref.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index 41ef3fa91864..d888e71e66b6 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -538,18 +538,13 @@ static int resolve_indirect_ref(struct btrfs_fs_info *fs_info, const u64 *extent_item_pos, bool ignore_offset) { struct btrfs_root *root; - struct btrfs_key root_key; struct extent_buffer *eb; int ret = 0; int root_level; int level = ref->level; struct btrfs_key search_key = ref->key_for_search; - root_key.objectid = ref->root_id; - root_key.type = BTRFS_ROOT_ITEM_KEY; - root_key.offset = (u64)-1; - - root = btrfs_get_fs_root(fs_info, &root_key, false); + root = btrfs_get_fs_root(fs_info, ref->root_id, false); if (IS_ERR(root)) { ret = PTR_ERR(root); goto out_free; @@ -2690,16 +2685,12 @@ static int handle_indirect_tree_backref(struct btrfs_backref_cache *cache, struct btrfs_backref_edge *edge; struct extent_buffer *eb; struct btrfs_root *root; - struct btrfs_key root_key; struct rb_node *rb_node; int level; bool need_check = true; int ret; - root_key.objectid = ref_key->offset; - root_key.type = BTRFS_ROOT_ITEM_KEY; - root_key.offset = (u64)-1; - root = btrfs_get_fs_root(fs_info, &root_key, false); + root = btrfs_get_fs_root(fs_info, ref_key->offset, false); if (IS_ERR(root)) return PTR_ERR(root); if (!test_bit(BTRFS_ROOT_SHAREABLE, &root->state)) |