trace-cmd: Added jbd2 plugin

Added the jbd2 plugin that adds the helper functions to handle
jbd2_dev_to_name() and jiffies_to_msecs().

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

2 files changed, 70 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 4f35ca0..b094abe 100644
--- a/Makefile
+++ b/Makefile
@@ -210,7 +210,7 @@ TCMD_LIB_OBJS = $(PEVENT_LIB_OBJS) trace-util.o trace-input.o trace-ftrace.o \
                         trace-output.o trace-record.o
 
 PLUGIN_OBJS = plugin_hrtimer.o plugin_kmem.o plugin_sched_switch.o \
-        plugin_mac80211.o
+        plugin_mac80211.o plugin_jbd2.o
 
 PLUGINS := $(PLUGIN_OBJS:.o=.so)
 
diff --git a/plugin_jbd2.c b/plugin_jbd2.c
new file mode 100644
index 0000000..4ee32de
--- /dev/null
+++ b/plugin_jbd2.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License (not later!)
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "parse-events.h"
+
+#define MINORBITS       20
+#define MINORMASK       ((1U << MINORBITS) - 1)
+
+#define MAJOR(dev)      ((unsigned int) ((dev) >> MINORBITS))
+#define MINOR(dev)      ((unsigned int) ((dev) & MINORMASK))
+
+unsigned long long process_jbd2_dev_to_name(struct trace_seq *s,
+                                            unsigned long long *args)
+{
+        unsigned int dev = args[0];
+
+        trace_seq_printf(s, "%d:%d", MAJOR(dev), MINOR(dev));
+
+        return 0;
+}
+
+unsigned long long process_jiffies_to_msecs(struct trace_seq *s,
+                                            unsigned long long *args)
+{
+        unsigned long long jiffies = args[0];
+
+        trace_seq_printf(s, "%lld", jiffies);
+
+        return jiffies;
+}
+
+int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
+{
+        pevent_register_print_function(pevent,
+                                       process_jbd2_dev_to_name,
+                                       PEVENT_FUNC_ARG_STRING,
+                                       "jbd2_dev_to_name",
+                                       PEVENT_FUNC_ARG_INT,
+                                       PEVENT_FUNC_ARG_VOID);
+
+        pevent_register_print_function(pevent,
+                                       process_jiffies_to_msecs,
+                                       PEVENT_FUNC_ARG_LONG,
+                                       "jiffies_to_msecs",
+                                       PEVENT_FUNC_ARG_LONG,
+                                       PEVENT_FUNC_ARG_VOID);
+        return 0;
+}