Messages in this thread Patch in this message | | | From | Wang Nan <> | Subject | [PATCH v6 07/16] perf test: Check environment before start real BPF test | Date | Thu, 17 Dec 2015 10:55:15 +0000 |
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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: Wang Nan <wangnan0@huawei.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/tests/bpf.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+)
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c index 33689a0..826b4b3 100644 --- a/tools/perf/tests/bpf.c +++ b/tools/perf/tests/bpf.c @@ -1,7 +1,11 @@ #include <stdio.h> #include <sys/epoll.h> +#include <util/util.h> #include <util/bpf-loader.h> #include <util/evlist.h> +#include <linux/bpf.h> +#include <linux/filter.h> +#include <bpf/bpf.h> #include "tests.h" #include "llvm.h" #include "debug.h" @@ -227,6 +231,36 @@ const char *test__bpf_subtest_get_desc(int i) 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 err; @@ -239,6 +273,9 @@ int test__bpf(int i) return TEST_SKIP; } + if (check_env()) + return TEST_SKIP; + err = __test__bpf(i); return err; } -- 1.8.3.4
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