From: Casey Bodley <cbodley@redhat.com>
Date: Mon, 23 Jan 2017 19:59:33 +0000 (-0500)
Subject: rgw: use objv_tracker for mdlog history
X-Git-Tag: v12.0.3~20^2~17
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=2c7897309617b29fc24a85ae21efffc387908380;p=ceph.git

rgw: use objv_tracker for mdlog history

Signed-off-by: Casey Bodley <cbodley@redhat.com>
---

diff --git a/src/rgw/rgw_metadata.cc b/src/rgw/rgw_metadata.cc
index e26201bc3be4..6ad2d1fd1f67 100644
--- a/src/rgw/rgw_metadata.cc
+++ b/src/rgw/rgw_metadata.cc
@@ -313,28 +313,6 @@ public:
 static RGWMetadataTopHandler md_top_handler;
 
 
-static const std::string mdlog_history_oid = "meta.history";
-
-struct RGWMetadataLogHistory {
-  epoch_t oldest_realm_epoch;
-  std::string oldest_period_id;
-
-  void encode(bufferlist& bl) const {
-    ENCODE_START(1, 1, bl);
-    ::encode(oldest_realm_epoch, bl);
-    ::encode(oldest_period_id, bl);
-    ENCODE_FINISH(bl);
-  }
-  void decode(bufferlist::iterator& p) {
-    DECODE_START(1, p);
-    ::decode(oldest_realm_epoch, p);
-    ::decode(oldest_period_id, p);
-    DECODE_FINISH(p);
-  }
-};
-WRITE_CLASS_ENCODER(RGWMetadataLogHistory)
-
-
 RGWMetadataManager::RGWMetadataManager(CephContext *_cct, RGWRados *_store)
   : cct(_cct), store(_store)
 {
@@ -351,15 +329,18 @@ RGWMetadataManager::~RGWMetadataManager()
   handlers.clear();
 }
 
+const std::string RGWMetadataLogHistory::oid = "meta.history";
+
 namespace {
 
-int read_history(RGWRados *store, RGWMetadataLogHistory *state)
+int read_history(RGWRados *store, RGWMetadataLogHistory *state,
+                 RGWObjVersionTracker *objv_tracker)
 {
   RGWObjectCtx ctx{store};
   auto& pool = store->get_zone_params().log_pool;
-  const auto& oid = mdlog_history_oid;
+  const auto& oid = RGWMetadataLogHistory::oid;
   bufferlist bl;
-  int ret = rgw_get_system_obj(store, ctx, pool, oid, bl, nullptr, nullptr);
+  int ret = rgw_get_system_obj(store, ctx, pool, oid, bl, objv_tracker, nullptr);
   if (ret < 0) {
     return ret;
   }
@@ -375,15 +356,15 @@ int read_history(RGWRados *store, RGWMetadataLogHistory *state)
 }
 
 int write_history(RGWRados *store, const RGWMetadataLogHistory& state,
-                  bool exclusive = false)
+                  RGWObjVersionTracker *objv_tracker, bool exclusive = false)
 {
   bufferlist bl;
   state.encode(bl);
 
   auto& pool = store->get_zone_params().log_pool;
-  const auto& oid = mdlog_history_oid;
+  const auto& oid = RGWMetadataLogHistory::oid;
   return rgw_put_system_obj(store, pool, oid, bl.c_str(), bl.length(),
-                            exclusive, nullptr, real_time{});
+                            exclusive, objv_tracker, real_time{});
 }
 
 using Cursor = RGWPeriodHistory::Cursor;
@@ -431,7 +412,8 @@ Cursor RGWMetadataManager::init_oldest_log_period()
 {
   // read the mdlog history
   RGWMetadataLogHistory state;
-  int ret = read_history(store, &state);
+  RGWObjVersionTracker objv;
+  int ret = read_history(store, &state, &objv);
 
   if (ret == -ENOENT) {
     // initialize the mdlog history and write it
@@ -446,7 +428,7 @@ Cursor RGWMetadataManager::init_oldest_log_period()
     state.oldest_period_id = cursor.get_period().get_id();
 
     constexpr bool exclusive = true; // don't overwrite
-    int ret = write_history(store, state, exclusive);
+    int ret = write_history(store, state, &objv, exclusive);
     if (ret < 0 && ret != -EEXIST) {
       ldout(cct, 1) << "failed to write mdlog history: "
           << cpp_strerror(ret) << dendl;
@@ -486,7 +468,7 @@ Cursor RGWMetadataManager::init_oldest_log_period()
 Cursor RGWMetadataManager::read_oldest_log_period() const
 {
   RGWMetadataLogHistory state;
-  int ret = read_history(store, &state);
+  int ret = read_history(store, &state, nullptr);
   if (ret < 0) {
     ldout(store->ctx(), 1) << "failed to read mdlog history: "
         << cpp_strerror(ret) << dendl;
diff --git a/src/rgw/rgw_metadata.h b/src/rgw/rgw_metadata.h
index 8b7526399a8d..d19fa8bfa7bd 100644
--- a/src/rgw/rgw_metadata.h
+++ b/src/rgw/rgw_metadata.h
@@ -265,6 +265,27 @@ struct RGWMetadataLogData {
 };
 WRITE_CLASS_ENCODER(RGWMetadataLogData)
 
+struct RGWMetadataLogHistory {
+  epoch_t oldest_realm_epoch;
+  std::string oldest_period_id;
+
+  void encode(bufferlist& bl) const {
+    ENCODE_START(1, 1, bl);
+    ::encode(oldest_realm_epoch, bl);
+    ::encode(oldest_period_id, bl);
+    ENCODE_FINISH(bl);
+  }
+  void decode(bufferlist::iterator& p) {
+    DECODE_START(1, p);
+    ::decode(oldest_realm_epoch, p);
+    ::decode(oldest_period_id, p);
+    DECODE_FINISH(p);
+  }
+
+  static const std::string oid;
+};
+WRITE_CLASS_ENCODER(RGWMetadataLogHistory)
+
 class RGWMetadataManager {
   map<string, RGWMetadataHandler *> handlers;
   CephContext *cct;