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tools: bpftool: add a command to display bpftool version

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This command can be used to print the version of the tool, which is in
fact the version from Linux taken from usr/include/linux/version.h.

Example usage:

    $ bpftool version
    bpftool v4.14.0

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Quentin Monnet 2017-10-19 15:46:26 -07:00 committed by David S. Miller
parent 8dfbc6d1d2
commit 821cfbb0dc
2 changed files with 15 additions and 1 deletions
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2
tools/bpf/bpftool/Documentation/bpftool.rst
View File

@ -14,6 +14,8 @@ SYNOPSIS
**bpftool** batch file *FILE*
**bpftool** version
*OBJECT* := { **map** | **program** }
*MAP-COMMANDS* :=

14
tools/bpf/bpftool/main.c
View File

@ -37,6 +37,7 @@
#include <ctype.h>
#include <errno.h>
#include <linux/bpf.h>
#include <linux/version.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -62,13 +63,23 @@ static int do_help(int argc, char **argv)
fprintf(stderr,
"Usage: %s OBJECT { COMMAND | help }\n"
" %s batch file FILE\n"
" %s version\n"
"\n"
" OBJECT := { prog | map }\n",
bin_name, bin_name);
bin_name, bin_name, bin_name);
return 0;
}
static int do_version(int argc, char **argv)
{
printf("%s v%d.%d.%d\n", bin_name,
LINUX_VERSION_CODE >> 16,
LINUX_VERSION_CODE >> 8 & 0xf,
LINUX_VERSION_CODE & 0xf);
return 0;
}
int cmd_select(const struct cmd *cmds, int argc, char **argv,
int (*help)(int argc, char **argv))
{
@ -128,6 +139,7 @@ static const struct cmd cmds[] = {
{ "batch", do_batch },
{ "prog", do_prog },
{ "map", do_map },
{ "version", do_version },
{ 0 }
};