diff options
Diffstat (limited to 'fs/bcachefs/snapshot.h')
| -rw-r--r-- | fs/bcachefs/snapshot.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/bcachefs/snapshot.h b/fs/bcachefs/snapshot.h index fef32a0118c4..28d9a29a1fd0 100644 --- a/fs/bcachefs/snapshot.h +++ b/fs/bcachefs/snapshot.h @@ -51,6 +51,17 @@ static inline u32 bch2_snapshot_tree(struct bch_fs *c, u32 id) return s ? s->tree : 0; } +static inline bool bch2_snapshots_same_tree(struct bch_fs *c, u32 id1, u32 id2) +{ + if (id1 == id2) + return true; + + guard(rcu)(); + const struct snapshot_t *s1 = snapshot_t(c, id1); + const struct snapshot_t *s2 = snapshot_t(c, id2); + return s1 && s2 && s1->tree == s2->tree; +} + static inline u32 __bch2_snapshot_parent_early(struct bch_fs *c, u32 id) { const struct snapshot_t *s = snapshot_t(c, id); @@ -157,6 +168,10 @@ bool __bch2_snapshot_is_ancestor(struct bch_fs *, u32, u32); static inline bool bch2_snapshot_is_ancestor(struct bch_fs *c, u32 id, u32 ancestor) { + EBUG_ON(!id); + EBUG_ON(!ancestor); + EBUG_ON(!bch2_snapshots_same_tree(c, id, ancestor)); + return id == ancestor ? true : __bch2_snapshot_is_ancestor(c, id, ancestor); |