mds: log evicted clients to clog/dbg

Fixes: http://tracker.ceph.com/issues/37639
Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
(cherry picked from commit 7a81421453f76c6a67f28f749f1489737f7b58c5)

Conflicts:
	src/mds/MDSRank.cc
	  - Used 'std::stringstream' instead of 'CachedStackStringStream'
	    and repllaced the 'ss.strv()' to 'ss.str()'.

diff --git a/src/mds/MDSRank.cc b/src/mds/MDSRank.cc
index 9ef53b14f5002869f33ddcd5f1548b30c6eed792..cfc201ec5c8d6895065bec24d57c388cbc938a4a 100644 (file)
--- a/src/mds/MDSRank.cc
+++ b/src/mds/MDSRank.cc
@@ -3203,11 +3203,20 @@ bool MDSRank::evict_client(int64_t session_id,
     return false;
   }
 
+  auto& addr = session->info.inst.addr;
+  {
+    std::stringstream ss;
+    ss << "Evicting " << (blacklist ? "(and blacklisting) " : "")
+       << "client session " << session_id << " (" << addr << ")";
+    dout(1) << ss.str() << dendl;
+    clog->info() << ss.str();
+  }
+
   dout(4) << "Preparing blacklist command... (wait=" << wait << ")" << dendl;
   stringstream ss;
   ss << "{\"prefix\":\"osd blacklist\", \"blacklistop\":\"add\",";
   ss << "\"addr\":\"";
-  ss << session->info.inst.addr;
+  ss << addr;
   ss << "\"}";
   std::string tmp = ss.str();
   std::vector<std::string> cmd = {tmp};