cls/rbd: silence the log of get metadata error

When getting the qos of an image without qos set,
there is a lot of printing in the OSD log file.
```
2018-12-07 15:23:51.122 7f01de695700  0 <cls> /home/swb/ceph/ceph-dev/src/cls/rbd/cls_rbd.cc:3728: error get metadata: (2) No such file or directory
```

Signed-off-by: songweibin <song.weibin@zte.com.cn>

diff --git a/src/cls/rbd/cls_rbd.cc b/src/cls/rbd/cls_rbd.cc
index 8432235779714f59b2e1df6aae741aae80464758..40bb1a05196f1886ed6a904366722d762c54c19e 100644 (file)
--- a/src/cls/rbd/cls_rbd.cc
+++ b/src/cls/rbd/cls_rbd.cc
@@ -3659,7 +3659,7 @@ int metadata_set(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
 
   for (map<string, bufferlist>::iterator it = data.begin();
        it != data.end(); ++it) {
-    CLS_LOG(20, "metdata_set key=%s value=%.*s", it->first.c_str(),
+    CLS_LOG(20, "metadata_set key=%s value=%.*s", it->first.c_str(),
            it->second.length(), it->second.c_str());
     raw_data[metadata_key_for_name(it->first)].swap(it->second);
   }
@@ -3690,11 +3690,11 @@ int metadata_remove(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
     return -EINVAL;
   }
 
-  CLS_LOG(20, "metdata_remove key=%s", key.c_str());
+  CLS_LOG(20, "metadata_remove key=%s", key.c_str());
 
   int r = cls_cxx_map_remove_key(hctx, metadata_key_for_name(key));
   if (r < 0) {
-    CLS_ERR("error remove metadata: %s", cpp_strerror(r).c_str());
+    CLS_ERR("error removing metadata: %s", cpp_strerror(r).c_str());
     return r;
   }
 
@@ -3721,11 +3721,12 @@ int metadata_get(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
     return -EINVAL;
   }
 
-  CLS_LOG(20, "metdata_get key=%s", key.c_str());
+  CLS_LOG(20, "metadata_get key=%s", key.c_str());
 
   int r = cls_cxx_map_get_val(hctx, metadata_key_for_name(key), &value);
   if (r < 0) {
-    CLS_ERR("error get metadata: %s", cpp_strerror(r).c_str());
+    if (r != -ENOENT)
+      CLS_ERR("error getting metadata: %s", cpp_strerror(r).c_str());
     return r;
   }