Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 6a7d550e authored by Wang Nan's avatar Wang Nan Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Check environment before start real BPF test 



Copying perf to old kernel system results:

  # perf test bpf
  37: Test BPF filter                                          :
  37.1: Test basic BPF filtering                               : FAILED!
  37.2: Test BPF prologue generation                           : Skip

However, in case when kernel doesn't support a test case it should
return 'Skip', 'FAILED!' should be reserved for kernel tests for when
the kernel supports a feature that then fails to work as advertised.

This patch checks environment before real testcase.

Signed-off-by: default avatarWang Nan <wangnan0@huawei.com>
Suggested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1453715801-7732-7-git-send-email-wangnan0@huawei.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent fd786fac

tools/perf/tests/bpf.c

+37 −0
Original line number Original line Diff line number Diff line 
#include <stdio.h>

#include <stdio.h>

#include <sys/epoll.h>

#include <sys/epoll.h>

#include <util/util.h>

#include <util/bpf-loader.h>

#include <util/bpf-loader.h>

#include <util/evlist.h>

#include <util/evlist.h>

#include <linux/bpf.h>

#include <linux/filter.h>

#include <bpf/bpf.h>

#include "tests.h"

#include "tests.h"

#include "llvm.h"

#include "llvm.h"

#include "debug.h"

#include "debug.h"
@@ -243,6 +247,36 @@ const char *test__bpf_subtest_get_desc(int i) 
	return bpf_testcase_table[i].desc;

	return bpf_testcase_table[i].desc;

}

}





static int check_env(void)

{

	int err;

	unsigned int kver_int;

	char license[] = "GPL";



	struct bpf_insn insns[] = {

		BPF_MOV64_IMM(BPF_REG_0, 1),

		BPF_EXIT_INSN(),

	};



	err = fetch_kernel_version(&kver_int, NULL, 0);

	if (err) {

		pr_debug("Unable to get kernel version\n");

		return err;

	}



	err = bpf_load_program(BPF_PROG_TYPE_KPROBE, insns,

			       sizeof(insns) / sizeof(insns[0]),

			       license, kver_int, NULL, 0);

	if (err < 0) {

		pr_err("Missing basic BPF support, skip this test: %s\n",

		       strerror(errno));

		return err;

	}

	close(err);



	return 0;

}



int test__bpf(int i)

int test__bpf(int i)

{

{

	int err;

	int err;
@@ -255,6 +289,9 @@ int test__bpf(int i) 
		return TEST_SKIP;

		return TEST_SKIP;

	}

	}





	if (check_env())

		return TEST_SKIP;



	err = __test__bpf(i);

	err = __test__bpf(i);

	return err;

	return err;

}

}