monitor: Separate QUORUM_REPORT_BAD events according to the node name

The QUORUM_REPORT_BAD event is emitted whenever there's an I/O error
in a child of a Quorum device. This event is emitted at a maximum rate
of 1 per second. This means that an error in one of the children will
mask errors in the other children if they happen within the same 1
second interval.

This patch modifies qapi_event_throttle_equal() so QUORUM_REPORT_BAD
events are kept separately if they come from different children.
Signed-off-by: NAlberto Garcia <berto@igalia.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Message-id: b989c0cb3755bc4b6696e796fa8ed2ef6c56606a.1457610443.git.berto@igalia.com
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NMax Reitz <mreitz@redhat.com>

monitor.c

@@ -572,6 +572,10 @@ static unsigned int qapi_event_throttle_hash(const void *key)
         hash += g_str_hash(qdict_get_str(evstate->data, "id"));
     }
 
+    if (evstate->event == QAPI_EVENT_QUORUM_REPORT_BAD) {
+        hash += g_str_hash(qdict_get_str(evstate->data, "node-name"));
+    }
+
     return hash;
 }
 
@@ -589,6 +593,11 @@ static gboolean qapi_event_throttle_equal(const void *a, const void *b)
                        qdict_get_str(evb->data, "id"));
     }
 
+    if (eva->event == QAPI_EVENT_QUORUM_REPORT_BAD) {
+        return !strcmp(qdict_get_str(eva->data, "node-name"),
+                       qdict_get_str(evb->data, "node-name"));
+    }
+
     return TRUE;
 }