rgw: change the bucket reshard lock to exclusive-ephemeral

The bucket reshard lock was simply an exclusive lock that existed on
an object solely for the purpose of representing the lock. This is now
changed to exclusvie-ephemeral lock, so as not to leave these objects
behind.

Signed-off-by: J. Eric Ivancich <ivancich@redhat.com>
(cherry picked from commit bc0a5ff95247b41b5a8336a8c4ed83c4315c1966)

diff --git a/src/rgw/rgw_reshard.cc b/src/rgw/rgw_reshard.cc
index 3b563cd51383f8d7251348c3586c967e36207160..fab5522595fba31a6dbcbfe9d5bf86862cfe74c4 100644 (file)
--- a/src/rgw/rgw_reshard.cc
+++ b/src/rgw/rgw_reshard.cc
@@ -226,9 +226,11 @@ RGWBucketReshard::RGWBucketReshard(RGWRados *_store,
 int RGWBucketReshard::lock_bucket()
 {
   reshard_lock.set_must_renew(false);
-  int ret = reshard_lock.lock_exclusive(&store->reshard_pool_ctx, reshard_oid);
+  int ret = reshard_lock.lock_exclusive_ephemeral(&store->reshard_pool_ctx,
+                                                 reshard_oid);
   if (ret < 0) {
-    ldout(store->ctx(), 0) << "RGWReshard::add failed to acquire lock on " << reshard_oid << " ret=" << ret << dendl;
+    ldout(store->ctx(), 0) << "RGWReshard::add failed to acquire lock on " <<
+      reshard_oid << " ret=" << ret << dendl;
     return ret;
   }
   lock_start_time = Clock::now();
@@ -257,7 +259,8 @@ int RGWBucketReshard::renew_lock_bucket(const Clock::time_point& now)
   }
 
   reshard_lock.set_must_renew(true);
-  int ret = reshard_lock.lock_exclusive(&store->reshard_pool_ctx, reshard_oid);
+  int ret = reshard_lock.lock_exclusive_ephemeral(&store->reshard_pool_ctx,
+                                                 reshard_oid);
   if (ret < 0) { /* expired or already locked by another processor */
     ldout(store->ctx(), 5) << __func__ << "(): failed to renew lock on " <<
       reshard_oid << " with " << cpp_strerror(-ret) << dendl;