extblkdev/fcm: derr when FCM and no block device discard

Add derr message when FCM is in use but discard is not enabled.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

diff --git a/src/extblkdev/fcm/ExtBlkDevPluginFcm.cc b/src/extblkdev/fcm/ExtBlkDevPluginFcm.cc
index 06ef9ecefb897110def698d56c370d96a5e05995..33153d60f26df3c308f08cf5d83a35665371325e 100644 (file)
--- a/src/extblkdev/fcm/ExtBlkDevPluginFcm.cc
+++ b/src/extblkdev/fcm/ExtBlkDevPluginFcm.cc
@@ -426,6 +426,10 @@ public:
     if (r != 0) {
       delete fcm;
       return r;
+    } else {
+      if (!cct->_conf->bdev_enable_discard) {
+        derr << "FCM device in use, but bdev_enable_discard not enabled. Free space will leak." << dendl;
+      }
     }
     ext_blk_dev.reset(fcm);
     return 0;