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tools/bpf: adjust rlimit RLIMIT_MEMLOCK for test_tcpbpf_user

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The default rlimit RLIMIT_MEMLOCK is 64KB. In certain cases,
e.g. in a test machine mimicking our production system, this test may
fail due to unable to charge the required memory for map creation:
   # ./test_tcpbpf_user
   libbpf: failed to create map (name: 'global_map'): Operation not permitted
   libbpf: failed to load object 'test_tcpbpf_kern.o'
   FAILED: load_bpf_file failed for: test_tcpbpf_kern.o

Changing the default rlimit RLIMIT_MEMLOCK to unlimited makes
the test always pass.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yonghong Song 2018-02-13 10:35:05 -08:00 committed by Alexei Starovoitov
parent 41757dcb0c
commit 615a947498
1 changed files with 6 additions and 0 deletions
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6
tools/testing/selftests/bpf/test_tcpbpf_user.c
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@ -11,6 +11,8 @@
#include <linux/ptrace.h>
#include <linux/bpf.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
@ -42,6 +44,7 @@ static int bpf_find_map(const char *test, struct bpf_object *obj,
int main(int argc, char **argv)
{
struct rlimit limit = { RLIM_INFINITY, RLIM_INFINITY };
const char *file = "test_tcpbpf_kern.o";
struct tcpbpf_globals g = {0};
int cg_fd, prog_fd, map_fd;
@ -54,6 +57,9 @@ int main(int argc, char **argv)
int pid;
int rv;
if (setrlimit(RLIMIT_MEMLOCK, &limit) < 0)
perror("Unable to lift memlock rlimit");
if (argc > 1 && strcmp(argv[1], "-d") == 0)
debug_flag = true;