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Commit 615a9474 authored by Yonghong Song's avatar Yonghong Song Committed by Alexei Starovoitov
Browse files

tools/bpf: adjust rlimit RLIMIT_MEMLOCK for test_tcpbpf_user 



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: default avatarYonghong Song <yhs@fb.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 41757dcb

tools/testing/selftests/bpf/test_tcpbpf_user.c

+6 −0
Original line number Diff line number Diff line
@@ -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;