coalesce data and coding index (#7765)

ledger/src/blocktree.rs

@@ -867,7 +867,7 @@ impl Blocktree {
 
     fn should_insert_coding_shred(
         shred: &Shred,
-        coding_index: &CodingIndex,
+        coding_index: &ShredIndex,
         last_root: &RwLock<u64>,
     ) -> bool {
         let slot = shred.slot();
@@ -909,7 +909,7 @@ impl Blocktree {
     fn should_insert_data_shred(
         shred: &Shred,
         slot_meta: &SlotMeta,
-        data_index: &DataIndex,
+        data_index: &ShredIndex,
         last_root: &RwLock<u64>,
     ) -> bool {
         let shred_index = u64::from(shred.index());
@@ -967,7 +967,7 @@ impl Blocktree {
     fn insert_data_shred(
         &self,
         slot_meta: &mut SlotMeta,
-        data_index: &mut DataIndex,
+        data_index: &mut ShredIndex,
         shred: &Shred,
         write_batch: &mut WriteBatch,
     ) -> Result<()> {
@@ -5157,7 +5157,7 @@ pub mod tests {
         }
 
         // Test the data index doesn't have anything extra
-        let num_data_in_index = index.data().num_data();
+        let num_data_in_index = index.data().num_shreds();
         assert_eq!(num_data_in_index, num_data);
 
         // Test the set of coding shreds in the index and in the coding column
@@ -5170,7 +5170,7 @@ pub mod tests {
         }
 
         // Test the data index doesn't have anything extra
-        let num_coding_in_index = index.coding().num_coding();
+        let num_coding_in_index = index.coding().num_shreds();
         assert_eq!(num_coding_in_index, num_coding);
     }
 }

ledger/src/blocktree_meta.rs

@@ -37,20 +37,13 @@ pub struct SlotMeta {
 /// Index recording presence/absence of shreds
 pub struct Index {
     pub slot: Slot,
-    data: DataIndex,
-    coding: CodingIndex,
+    data: ShredIndex,
+    coding: ShredIndex,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Serialize, PartialEq)]
-pub struct DataIndex {
-    /// Map representing presence/absence of data shreds
-    index: BTreeSet<u64>,
-}
-
-#[derive(Clone, Debug, Default, Deserialize, Serialize, PartialEq)]
-/// Erasure coding information
-pub struct CodingIndex {
-    /// Map from set index, to hashmap from shred index to presence bool
+pub struct ShredIndex {
+    /// Map representing presence/absence of shreds
     index: BTreeSet<u64>,
 }
 
@@ -78,56 +71,28 @@ impl Index {
     pub(crate) fn new(slot: Slot) -> Self {
         Index {
             slot,
-            data: DataIndex::default(),
-            coding: CodingIndex::default(),
+            data: ShredIndex::default(),
+            coding: ShredIndex::default(),
         }
     }
 
-    pub fn data(&self) -> &DataIndex {
+    pub fn data(&self) -> &ShredIndex {
         &self.data
     }
-    pub fn coding(&self) -> &CodingIndex {
+    pub fn coding(&self) -> &ShredIndex {
         &self.coding
     }
 
-    pub fn data_mut(&mut self) -> &mut DataIndex {
+    pub fn data_mut(&mut self) -> &mut ShredIndex {
         &mut self.data
     }
-    pub fn coding_mut(&mut self) -> &mut CodingIndex {
+    pub fn coding_mut(&mut self) -> &mut ShredIndex {
         &mut self.coding
     }
 }
 
-impl CodingIndex {
-    pub fn num_coding(&self) -> usize {
-        self.index.len()
-    }
-
-    pub fn present_in_bounds(&self, bounds: impl RangeBounds<u64>) -> usize {
-        self.index.range(bounds).count()
-    }
-
-    pub fn is_present(&self, index: u64) -> bool {
-        self.index.contains(&index)
-    }
-
-    pub fn set_present(&mut self, index: u64, presence: bool) {
-        if presence {
-            self.index.insert(index);
-        } else {
-            self.index.remove(&index);
-        }
-    }
-
-    pub fn set_many_present(&mut self, presence: impl IntoIterator<Item = (u64, bool)>) {
-        for (idx, present) in presence.into_iter() {
-            self.set_present(idx, present);
-        }
-    }
-}
-
-impl DataIndex {
-    pub fn num_data(&self) -> usize {
+impl ShredIndex {
+    pub fn num_shreds(&self) -> usize {
         self.index.len()
     }