treewide: Remove trailing whitespace

[sliver-openvswitch.git] / lib / coverage.c

diff --git a/lib/coverage.c b/lib/coverage.c
index 15a66c2..8a9d0ea 100644 (file)
--- a/lib/coverage.c
+++ b/lib/coverage.c
@@ -1,17 +1,17 @@
 /*
- * Copyright (c) 2009 Nicira Networks.
+ * Copyright (c) 2009, 2010 Nicira Networks.
  *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
  *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 #include <config.h>
@@ -21,13 +21,28 @@
 #include "coverage-counters.h"
 #include "dynamic-string.h"
 #include "hash.h"
+#include "unixctl.h"
 #include "util.h"
-
-#define THIS_MODULE VLM_coverage
 #include "vlog.h"
 
+VLOG_DEFINE_THIS_MODULE(coverage)
+
 static unsigned int epoch;
 
+static void
+coverage_unixctl_log(struct unixctl_conn *conn, const char *args OVS_UNUSED,
+                     void *aux OVS_UNUSED)
+{
+    coverage_log(VLL_WARN, false);
+    unixctl_command_reply(conn, 200, NULL);
+}
+
+void
+coverage_init(void)
+{
+    unixctl_command_register("coverage/log", coverage_unixctl_log, NULL);
+}
+
 /* Sorts coverage counters in descending order by count, within equal counts
  * alphabetically by name. */
 static int
@@ -94,7 +109,7 @@ coverage_hit(uint32_t hash)
     unsigned int word_mask = 1u << (bit_index % BITS_PER_WORD);
 
     if (hit[word_index] & word_mask) {
-        return true;
+ return true;
     } else {
         hit[word_index] |= word_mask;
         return false;
@@ -107,9 +122,13 @@ coverage_log_counter(enum vlog_level level, const struct coverage_counter *c)
     VLOG(level, "%-24s %5u / %9llu", c->name, c->count, c->count + c->total);
 }
 
-/* Logs the coverage counters at the given vlog 'level'. */
+/* Logs the coverage counters at the given vlog 'level'.  If
+ * 'suppress_dups' is true, then duplicate events are not displayed.
+ * Care should be taken in the value used for 'level'.  Depending on the
+ * configuration, syslog can write changes synchronously, which can
+ * cause the coverage messages to take several seconds to write. */
 void
-coverage_log(enum vlog_level level)
+coverage_log(enum vlog_level level, bool suppress_dups)
 {
     size_t n_never_hit;
     uint32_t hash;
@@ -120,10 +139,12 @@ coverage_log(enum vlog_level level)
     }
 
     hash = coverage_hash();
-    if (coverage_hit(hash)) {
-        VLOG(level, "Skipping details of duplicate event coverage for "
-             "hash=%08"PRIx32" in epoch %u", hash, epoch);
-        return;
+    if (suppress_dups) {
+        if (coverage_hit(hash)) {
+            VLOG(level, "Skipping details of duplicate event coverage for "
+                 "hash=%08"PRIx32" in epoch %u", hash, epoch);
+            return;
+        }
     }
 
     n_never_hit = 0;