crimson/osd: settle SnapMapper within crimson'o PG

Signed-off-by: Radoslaw Zarzynski <rzarzyns@redhat.com>

src/crimson/osd/CMakeLists.txt

@@ -46,6 +46,7 @@ add_executable(crimson-osd
   ${PROJECT_SOURCE_DIR}/src/osd/PGStateUtils.cc
   ${PROJECT_SOURCE_DIR}/src/osd/MissingLoc.cc
   ${PROJECT_SOURCE_DIR}/src/osd/PGLog.cc
+  ${PROJECT_SOURCE_DIR}/src/osd/SnapMapper.cc
   ${PROJECT_SOURCE_DIR}/src/osd/recovery_types.cc
   ${PROJECT_SOURCE_DIR}/src/osd/osd_perf_counters.cc
   watch.cc

src/crimson/osd/pg.cc

@@ -142,6 +142,17 @@ PG::PG(
       obc_registry,
       *backend.get(),
       *this},
+    osdriver(
+      &shard_services.get_store(),
+      coll_ref,
+      pgid.make_pgmeta_oid()),
+    snap_mapper(
+      this->shard_services.get_cct(),
+      &osdriver,
+      pgid.ps(),
+      pgid.get_split_bits(pool.get_pg_num()),
+      pgid.pool(),
+      pgid.shard),
     wait_for_active_blocker(this)
 {
   peering_state.set_backend_predicates(

src/crimson/osd/pg.h

@@ -17,6 +17,7 @@
 #include "osd/osd_types.h"
 #include "crimson/osd/object_context.h"
 #include "osd/PeeringState.h"
+#include "osd/SnapMapper.h"
 
 #include "crimson/common/interruptible_future.h"
 #include "crimson/common/type_helpers.h"
@@ -614,6 +615,11 @@ public:
   ObjectContextRegistry obc_registry;
   ObjectContextLoader obc_loader;
 
+private:
+  OSDriver osdriver;
+  SnapMapper snap_mapper;
+
+public:
   // PeeringListener
   void publish_stats_to_osd() final;
   void clear_publish_stats() final;