add full_snapshot to hash config

core/src/accounts_hash_verifier.rs

@@ -142,6 +142,7 @@ impl AccountsHashVerifier {
                     epoch_schedule: &accounts_package.epoch_schedule,
                     rent_collector: &accounts_package.rent_collector,
                     store_detailed_debug_info_on_failure: false,
+                    full_snapshot: None,
                 },
                 &sorted_storages,
                 timings,
@@ -164,6 +165,7 @@ impl AccountsHashVerifier {
                         rent_collector: &accounts_package.rent_collector,
                         // now that we've failed, store off the failing contents that produced a bad capitalization
                         store_detailed_debug_info_on_failure: true,
+                        full_snapshot: None,
                     },
                     &sorted_storages,
                     HashStats::default(),

runtime/src/accounts_background_service.rs

@@ -241,6 +241,7 @@ impl SnapshotRequestHandler {
                             epoch_schedule: snapshot_root_bank.epoch_schedule(),
                             rent_collector: snapshot_root_bank.rent_collector(),
                             store_detailed_debug_info_on_failure: false,
+                            full_snapshot: None,
                         },
                     ).unwrap();
                     assert_eq!(previous_hash, this_hash);

runtime/src/accounts_db.rs

@@ -6742,6 +6742,7 @@ impl AccountsDb {
                     epoch_schedule,
                     rent_collector,
                     store_detailed_debug_info_on_failure: false,
+                    full_snapshot: None,
                 },
                 expected_capitalization,
             )
@@ -7023,6 +7024,7 @@ impl AccountsDb {
                     epoch_schedule,
                     rent_collector,
                     store_detailed_debug_info_on_failure: false,
+                    full_snapshot: None,
                 },
                 None,
             )?;
@@ -11626,6 +11628,7 @@ pub mod tests {
                 epoch_schedule: &EPOCH_SCHEDULE,
                 rent_collector: &RENT_COLLECTOR,
                 store_detailed_debug_info_on_failure: false,
+                full_snapshot: None,
             }
         }
     }

runtime/src/accounts_hash.rs

@@ -6,6 +6,7 @@ use {
     solana_sdk::{
         hash::{Hash, Hasher},
         pubkey::Pubkey,
+        slot_history::Slot,
         sysvar::epoch_schedule::EpochSchedule,
     },
     std::{
@@ -27,6 +28,15 @@ pub struct PreviousPass {
     pub lamports: u64,
 }
 
+#[derive(Debug)]
+#[allow(dead_code)]
+pub struct FullSnapshotAccountsHashInfo {
+    /// accounts hash over all accounts when the full snapshot was taken
+    hash: Hash,
+    /// slot where full snapshot was taken
+    slot: Slot,
+}
+
 /// parameters to calculate accounts hash
 #[derive(Debug)]
 pub struct CalcAccountsHashConfig<'a> {
@@ -45,6 +55,8 @@ pub struct CalcAccountsHashConfig<'a> {
     pub rent_collector: &'a RentCollector,
     /// used for tracking down hash mismatches after the fact
     pub store_detailed_debug_info_on_failure: bool,
+    /// `Some` if this is an incremental snapshot which only hashes slots since the base full snapshot
+    pub full_snapshot: Option<FullSnapshotAccountsHashInfo>,
 }
 
 impl<'a> CalcAccountsHashConfig<'a> {