trace-cmd: Add trace-cmd options

Add trace-cmd options that reads all the plugins and lists
the available options for trace-cmd report.

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

7 files changed, 161 insertions, 1 deletions

diff --git a/Documentation/trace-cmd-options.1.txt b/Documentation/trace-cmd-options.1.txt
new file mode 100644
index 0000000..2373554
--- /dev/null
+++ b/Documentation/trace-cmd-options.1.txt
@@ -0,0 +1,35 @@
+TRACE-CMD-OPTIONS(1)
+===================
+
+NAME
+----
+trace-cmd-options - list available options from trace-cmd plugins
+
+SYNOPSIS
+--------
+*trace-cmd options*
+
+DESCRIPTION
+-----------
+The trace-cmd(1) options command will examine all the trace-cmd plugins
+that are used by *trace-cmd report(1)* and list them.
+
+SEE ALSO
+--------
+trace-cmd(1), trace-cmd-record(1), trace-cmd-start(1), trace-cmd-stop(1),
+trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-split(1),
+trace-cmd-list(1), trace-cmd-listen(1)
+
+AUTHOR
+------
+Written by Steven Rostedt, <rostedt@goodmis.org>
+
+RESOURCES
+---------
+git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git
+
+COPYING
+-------
+Copyright \(C) 2011 Red Hat, Inc. Free use of this software is granted under
+the terms of the GNU Public License (GPL).
+
diff --git a/Documentation/trace-cmd.1.txt b/Documentation/trace-cmd.1.txt
index b67c023..f416b74 100644
--- a/Documentation/trace-cmd.1.txt
+++ b/Documentation/trace-cmd.1.txt
@@ -26,6 +26,8 @@ COMMANDS
   report  - reads a trace.dat file and converts the binary data to a
             ASCII text readable format.
 
+  options - list the plugin options that are available to *report*
+
   start   - start the tracing without recording to a trace.dat file.
 
   stop    - stop tracing (only disables recording, overhead of tracer
diff --git a/Makefile b/Makefile
index c4cd926..a3f1dd0 100644
--- a/Makefile
+++ b/Makefile
@@ -276,7 +276,7 @@ $(obj)/%.o: $(src)/%.c
 TRACE_GUI_OBJS = trace-filter.o trace-compat.o trace-hash.o trace-dialog.o \
                 trace-xml.o
 TRACE_CMD_OBJS = trace-cmd.o trace-record.o trace-read.o trace-split.o trace-listen.o \
-         trace-stack.o
+         trace-stack.o trace-options.o
 TRACE_VIEW_OBJS = trace-view.o trace-view-store.o
 TRACE_GRAPH_OBJS = trace-graph.o trace-plot.o trace-plot-cpu.o trace-plot-task.o
 TRACE_VIEW_MAIN_OBJS = trace-view-main.o $(TRACE_VIEW_OBJS) $(TRACE_GUI_OBJS)
diff --git a/trace-cmd.c b/trace-cmd.c
index c0b564c..02e16c0 100644
--- a/trace-cmd.c
+++ b/trace-cmd.c
@@ -166,6 +166,9 @@ int main (int argc, char **argv)
                 trace_record(argc, argv);
                 exit(0);
 
+        } else if (strcmp(argv[1], "options") == 0) {
+                trace_option(argc, argv);
+                exit(0);
         } else if (strcmp(argv[1], "list") == 0) {
                 int events = 0;
                 int plug = 0;
diff --git a/trace-local.h b/trace-local.h
index a73377f..5bfa3bd 100644
--- a/trace-local.h
+++ b/trace-local.h
@@ -48,4 +48,6 @@ void trace_restore(int argc, char **argv);
 
 void trace_stack(int argc, char **argv);
 
+void trace_option(int argc, char **argv);
+
 #endif /* __TRACE_LOCAL_H */
diff --git a/trace-options.c b/trace-options.c
new file mode 100644
index 0000000..70c6343
--- /dev/null
+++ b/trace-options.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2009, 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 General Public License as published by
+ * the Free Software Foundation; version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#define _LARGEFILE64_SOURCE
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <unistd.h>
+
+#include "trace-local.h"
+
+enum {
+        OPT_kallsyms    = 253,
+        OPT_events      = 254,
+        OPT_cpu         = 255,
+};
+
+struct option_list {
+        struct option_list      *next;
+        struct plugin_option    *op;
+};
+
+static struct plugin_list {
+        struct plugin_list      *next;
+        const char              *name;
+        struct option_list      *ops;
+} *plugin_list;
+
+static void add_option(struct plugin_option *option)
+{
+        struct plugin_list *pl;
+        struct option_list *po;
+        const char *name;
+
+        name = option->plugin_alias ? : option->file;
+
+        for (pl = plugin_list; pl; pl = pl->next) {
+                if (strcmp(name, pl->name) == 0)
+                        break;
+        }
+        if (!pl) {
+                pl = malloc_or_die(sizeof(*pl));
+                memset(pl, 0, sizeof(*pl));
+                pl->name = name;
+                pl->next = plugin_list;
+                plugin_list = pl;
+        };
+        po = malloc_or_die(sizeof(*po));
+        po->next = pl->ops;
+        pl->ops = po;
+        po->op = option;
+}
+
+void trace_option (int argc, char **argv)
+{
+        struct plugin_option *options;
+        struct plugin_option *op;
+        struct plugin_list *pl;
+        struct plugin_list *npl;
+        struct option_list *po;
+        struct option_list *npo;
+
+        if (argc < 2)
+                usage(argv);
+
+        if (strcmp(argv[1], "options") != 0)
+                usage(argv);
+
+        options = trace_util_read_plugin_options();
+        if (!options) {
+                printf("No plugin options found\n");
+                goto out;
+        }
+
+        /* Group them up according to aliases */
+        for (op = options; op; op = op->next)
+                add_option(op);
+
+        for (pl = plugin_list; pl; pl = npl) {
+                npl = pl->next;
+                printf("%s\n", pl->name);
+                for (po = pl->ops; po; po = npo) {
+                        npo = po->next;
+                        printf("  %s: %s\n",
+                               po->op->name, po->op->description);
+                        free(po);
+                }
+                free(pl);
+        }
+
+ out:
+        trace_util_free_options(options);
+        return;
+}
diff --git a/trace-usage.c b/trace-usage.c
index 1497279..39c8fc1 100644
--- a/trace-usage.c
+++ b/trace-usage.c
@@ -111,6 +111,11 @@ static struct usage_help usage_help[] = {
                 "          end   - decimal end time in seconds\n"
         },
         {
+                "options",
+                "list the plugin options available for trace-cmd report",
+                " %s options\n"
+        },
+        {
                 "listen",
                 "listen on a network socket for trace clients",
                 " %s listen -p port[-D][-o file][-d dir][-l logfile]\n"