trace-cmd: Only show plugins that are loaded when -V is used

The output of the plugins being loaded, while useful, are quite
annoying. Make it default off and add an option to display them.

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

4 files changed, 12 insertions, 3 deletions

diff --git a/Documentation/trace-cmd-report.txt b/Documentation/trace-cmd-report.txt
index f3f6e88..c753bc5 100644
--- a/Documentation/trace-cmd-report.txt
+++ b/Documentation/trace-cmd-report.txt
@@ -109,6 +109,9 @@ OPTIONS
     Will not display any sched_switch events that have a prev_state of 0.
     Removing the *-v* will only print out those events.
 
+*-V*::
+    Show the plugins that are loaded.
+
 *-l*::
     This adds a "latency output" format. Information about interrupts being
     disabled, soft irq being disabled, the "need_resched" flag being set,
diff --git a/trace-cmd.c b/trace-cmd.c
index 8889d29..153efce 100644
--- a/trace-cmd.c
+++ b/trace-cmd.c
@@ -53,6 +53,7 @@
 #define UDP_MAX_PACKET (65536 - 20)
 
 int silence_warnings;
+int show_status;
 
 static int use_tcp;
 
@@ -230,7 +231,7 @@ void pr_stat(char *fmt, ...)
 {
         va_list ap;
 
-        if (silence_warnings)
+        if (!show_status)
                 return;
 
         va_start(ap, fmt);
@@ -1334,7 +1335,7 @@ void usage(char **argv)
                "          Used in conjunction with start\n"
                "          -b change the kernel buffer size (in kilobytes per CPU)\n"
                "\n"
-               " %s report [-i file] [--cpu cpu] [-e][-f][-l][-P][-E][-F filter][-v]\n"
+               " %s report [-i file] [--cpu cpu] [-e][-f][-l][-P][-E][-F filter][-v][-V]\n"
                "          -i input file [default trace.dat]\n"
                "          -e show file endianess\n"
                "          -f show function list\n"
@@ -1342,6 +1343,7 @@ void usage(char **argv)
                "          -E show event files stored\n"
                "          -F filter to filter output on\n"
                "          -v will negate all -F after it (Not show matches)\n"
+               "          -V verbose (shows plugins being loaded)\n"
                "          -w show wakeup latencies\n"
                "          -l show latency format (default with latency tracers)\n"
                "\n"
diff --git a/trace-local.h b/trace-local.h
index 2c3d702..60b8b5e 100644
--- a/trace-local.h
+++ b/trace-local.h
@@ -31,6 +31,7 @@ typedef unsigned long long u64;
 void usage(char **argv);
 
 extern int silence_warnings;
+extern int show_status;
 
 struct tracecmd_input *read_trace_header(void);
 int read_trace_files(void);
diff --git a/trace-read.c b/trace-read.c
index 2ec5e57..d4b4b7a 100644
--- a/trace-read.c
+++ b/trace-read.c
@@ -576,7 +576,7 @@ void trace_report (int argc, char **argv)
                         {NULL, 0, NULL, 0}
                 };
 
-                c = getopt_long (argc-1, argv+1, "+hi:fepPlEwF:vq",
+                c = getopt_long (argc-1, argv+1, "+hi:fepPlEwF:Vvq",
                         long_options, &option_index);
                 if (c == -1)
                         break;
@@ -616,6 +616,9 @@ void trace_report (int argc, char **argv)
                                 die("Only 1 -v can be used");
                         neg = 1;
                         break;
+                case 'V':
+                        show_status = 1;
+                        break;
                 case 'q':
                         silence_warnings = 1;
                         break;