Adding new 'perf data' command to provide operations over
data files.

The 'perf data convert' sub command is coming in following patch,
but there's possibility for other useful commands like 'perf data ls'
(to display perf data file in directory in ls style).

Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Dominique Toupin <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jeremie Galarneau <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Tom Zanussi <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
---
 tools/perf/Documentation/perf-data.txt | 15 ++++++
 tools/perf/Makefile.perf               |  1 +
 tools/perf/builtin-data.c              | 98 ++++++++++++++++++++++++++++++++++
 tools/perf/builtin.h                   |  1 +
 tools/perf/command-list.txt            |  1 +
 tools/perf/perf.c                      |  1 +
 6 files changed, 117 insertions(+)
 create mode 100644 tools/perf/Documentation/perf-data.txt
 create mode 100644 tools/perf/builtin-data.c

diff --git a/tools/perf/Documentation/perf-data.txt 
b/tools/perf/Documentation/perf-data.txt
new file mode 100644
index 000000000000..b8c83947715c
--- /dev/null
+++ b/tools/perf/Documentation/perf-data.txt
@@ -0,0 +1,15 @@
+perf-data(1)
+==============
+
+NAME
+----
+perf-data - Data file related processing
+
+SYNOPSIS
+--------
+[verse]
+'perf data' [<common options>] <command> [<options>]",
+
+DESCRIPTION
+-----------
+Data file related processing.
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 4c5219b8e209..f25d848a9ab6 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -464,6 +464,7 @@ BUILTIN_OBJS += $(OUTPUT)builtin-kvm.o
 BUILTIN_OBJS += $(OUTPUT)builtin-inject.o
 BUILTIN_OBJS += $(OUTPUT)tests/builtin-test.o
 BUILTIN_OBJS += $(OUTPUT)builtin-mem.o
+BUILTIN_OBJS += $(OUTPUT)builtin-data.o
 
 PERFLIBS = $(LIB_FILE) $(LIBAPIKFS) $(LIBTRACEEVENT)
 
diff --git a/tools/perf/builtin-data.c b/tools/perf/builtin-data.c
new file mode 100644
index 000000000000..999bdd0e4c7f
--- /dev/null
+++ b/tools/perf/builtin-data.c
@@ -0,0 +1,98 @@
+#include <linux/compiler.h>
+#include "builtin.h"
+#include "perf.h"
+#include "debug.h"
+#include "parse-options.h"
+
+typedef int (*data_cmd_fn_t)(int argc, const char **argv, const char *prefix);
+
+struct data_cmd {
+       const char      *name;
+       const char      *summary;
+       data_cmd_fn_t   fn;
+};
+
+static struct data_cmd data_cmds[];
+
+#define for_each_cmd(cmd) \
+       for (cmd = data_cmds; cmd->name; cmd++)
+
+static const struct option data_options[] = {
+       OPT_END()
+};
+
+static const char * const data_usage[] = {
+       "perf data [<common options>] <command> [<options>]",
+       NULL
+};
+
+static void print_usage(void)
+{
+       struct data_cmd *cmd;
+
+       printf("Usage:\n");
+       printf("\t%s\n\n", data_usage[0]);
+       printf("\tAvailable commands:\n");
+
+       for_each_cmd(cmd) {
+               printf("\t %s\t- %s\n", cmd->name, cmd->summary);
+       }
+
+       printf("\n");
+}
+
+static const char * const data_convert_usage[] = {
+       "perf data convert [<options>]",
+       NULL
+};
+
+static int cmd_data_convert(int argc, const char **argv,
+                           const char *prefix __maybe_unused)
+{
+       const struct option options[] = {
+               OPT_INCR('v', "verbose", &verbose, "be more verbose"),
+               OPT_STRING('i', "input", &input_name, "file",
+                          "input file name"),
+               OPT_END()
+       };
+
+       argc = parse_options(argc, argv, options,
+                            data_convert_usage, 0);
+       if (argc) {
+               usage_with_options(data_convert_usage, options);
+               return -1;
+       }
+
+       return 0;
+}
+
+static struct data_cmd data_cmds[] = {
+       { "convert", "converts data file between formats", cmd_data_convert },
+       { NULL, NULL, NULL },
+};
+
+int cmd_data(int argc __maybe_unused, const char **argv __maybe_unused,
+            const char *prefix __maybe_unused)
+{
+       struct data_cmd *cmd;
+
+       /* No command specified. */
+       if (argc < 2)
+               goto usage;
+
+       argc = parse_options(argc, argv, data_options, data_usage,
+                            PARSE_OPT_STOP_AT_NON_OPTION);
+       if (argc < 1)
+               goto usage;
+
+       for_each_cmd(cmd) {
+               if (strcmp(cmd->name, argv[0]))
+                       continue;
+
+               return cmd->fn(argc, argv, prefix);
+       }
+
+usage:
+       print_usage();
+       return -1;
+}
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index b210d62907e4..3688ad29085f 100644
--- a/tools/perf/builtin.h
+++ b/tools/perf/builtin.h
@@ -37,6 +37,7 @@ extern int cmd_test(int argc, const char **argv, const char 
*prefix);
 extern int cmd_trace(int argc, const char **argv, const char *prefix);
 extern int cmd_inject(int argc, const char **argv, const char *prefix);
 extern int cmd_mem(int argc, const char **argv, const char *prefix);
+extern int cmd_data(int argc, const char **argv, const char *prefix);
 
 extern int find_scripts(char **scripts_array, char **scripts_path_array);
 #endif
diff --git a/tools/perf/command-list.txt b/tools/perf/command-list.txt
index 0906fc401c52..00fcaf8a5b8d 100644
--- a/tools/perf/command-list.txt
+++ b/tools/perf/command-list.txt
@@ -7,6 +7,7 @@ perf-archive                    mainporcelain common
 perf-bench                     mainporcelain common
 perf-buildid-cache             mainporcelain common
 perf-buildid-list              mainporcelain common
+perf-data                      mainporcelain common
 perf-diff                      mainporcelain common
 perf-evlist                    mainporcelain common
 perf-inject                    mainporcelain common
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 2282d41879a2..7dcd5f70b742 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -62,6 +62,7 @@ static struct cmd_struct commands[] = {
 #endif
        { "inject",     cmd_inject,     0 },
        { "mem",        cmd_mem,        0 },
+       { "data",       cmd_data,       0 },
 };
 
 struct pager_config {
-- 
1.8.3.1

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