feat(snapshot): snapshot tree query optimization

Signed-off-by: Hrudaya <hrudayaranjan.sahoo@datacore.com>

fix: handle review comments-v1, will be squashed before merge

Signed-off-by: Hrudaya <hrudayaranjan.sahoo@datacore.com>

Author: hrudaya21

io-engine/src/core/snapshot.rs

@@ -235,7 +235,9 @@ pub trait SnapshotOps {
     fn list_snapshot_by_snapshot_uuid(&self) -> Vec<VolumeSnapshotDescriptor>;
 
     /// List All Snapshot.
-    fn list_all_snapshots() -> Vec<VolumeSnapshotDescriptor>;
+    fn list_all_snapshots(
+        parent_lvol: Option<&Lvol>,
+    ) -> Vec<VolumeSnapshotDescriptor>;
 
     /// Create snapshot clone.
     async fn create_clone(
@@ -350,13 +352,11 @@ pub trait SnapshotOps {
         total_ancestor_snap_size: u64,
     ) -> Option<u64>;
 
-    /// When snapshot is destroyed, reset the parent lvol usage cache and its
-    /// successor snapshot and clone usage cache.
-    fn reset_snapshot_parent_successor_usage_cache(&self);
-
-    /// When snapshot is destroyed, reset cache of successor snapshots and
-    /// clones based on snapshot parent uuid.
-    fn reset_successor_lvol_usage_cache(&self, snapshot_parent_uuid: String);
+    /// Reset snapshot tree usage cache. if the lvol is replica, then reset
+    /// cache will be based on replica uuid, which is parent uuid for all
+    /// snapshots created from the replica. if the lvol is not replica, then
+    /// reset cache  will be judge based on lvol tree present in the system.
+    fn reset_snapshot_tree_usage_cache(&self, is_replica: bool);
 }
 
 /// Traits gives the Snapshots Related Parameters.

io-engine/src/grpc/v1/replica.rs

@@ -118,8 +118,10 @@ impl From<LvolSpaceUsage> for ReplicaSpaceUsage {
 impl From<Lvol> for Replica {
     fn from(l: Lvol) -> Self {
         let usage = l.usage();
-        let source_uuid =
-            Lvol::get_blob_xattr(&l, CloneXattrs::SourceUuid.name());
+        let source_uuid = Lvol::get_blob_xattr(
+            l.blob_checked(),
+            CloneXattrs::SourceUuid.name(),
+        );
         Self {
             name: l.name(),
             uuid: l.uuid(),

io-engine/src/grpc/v1/snapshot.rs

@@ -510,7 +510,7 @@ impl SnapshotRpc for SnapshotService {
                     } else {
                         // if source_uuid is not input, list all snapshot
                         // present in system
-                        snapshots = Lvol::list_all_snapshots()
+                        snapshots = Lvol::list_all_snapshots(None)
                             .into_iter()
                             .map(SnapshotInfo::from)
                             .collect();