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authorQu Wenruo <wqu@suse.com>2020-03-03 13:55:12 +0800
committerDavid Sterba <dsterba@suse.com>2020-05-25 11:25:20 +0200
commit13fe1bdb22f8302afa5e588e89a7a94606ef35fb (patch)
tree4d44d6eb3478183d10fae59e01c4c425380ccc55 /fs/btrfs/backref.c
parent023acb07bc996636b39c70e07966f70e70c0a008 (diff)
downloadlinux-13fe1bdb22f8302afa5e588e89a7a94606ef35fb.tar.bz2
btrfs: backref: rename and move backref_cache_cleanup()
Since we're releasing all existing nodes/edges, other than cleanup the mess after error, "release" is a more proper naming here. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/backref.c')
-rw-r--r--fs/btrfs/backref.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index daac20c1a417..44808a0b480f 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -2559,3 +2559,36 @@ void btrfs_backref_cleanup_node(struct btrfs_backref_cache *cache,
btrfs_backref_drop_node(cache, node);
}
+
+/*
+ * Release all nodes/edges from current cache
+ */
+void btrfs_backref_release_cache(struct btrfs_backref_cache *cache)
+{
+ struct btrfs_backref_node *node;
+ int i;
+
+ while (!list_empty(&cache->detached)) {
+ node = list_entry(cache->detached.next,
+ struct btrfs_backref_node, list);
+ btrfs_backref_cleanup_node(cache, node);
+ }
+
+ while (!list_empty(&cache->leaves)) {
+ node = list_entry(cache->leaves.next,
+ struct btrfs_backref_node, lower);
+ btrfs_backref_cleanup_node(cache, node);
+ }
+
+ cache->last_trans = 0;
+
+ for (i = 0; i < BTRFS_MAX_LEVEL; i++)
+ ASSERT(list_empty(&cache->pending[i]));
+ ASSERT(list_empty(&cache->pending_edge));
+ ASSERT(list_empty(&cache->useless_node));
+ ASSERT(list_empty(&cache->changed));
+ ASSERT(list_empty(&cache->detached));
+ ASSERT(RB_EMPTY_ROOT(&cache->rb_root));
+ ASSERT(!cache->nr_nodes);
+ ASSERT(!cache->nr_edges);
+}