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Commit e043325b authored by Chenbo Feng's avatar Chenbo Feng Committed by David S. Miller
Browse files

bpf: Add tests for eBPF file mode 



Two related tests are added into bpf selftest to test read only map and
write only map. The tests verified the read only and write only flags
are working on hash maps.

Signed-off-by: default avatarChenbo Feng <fengc@google.com>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6e71b04a

tools/testing/selftests/bpf/test_maps.c

+48 −0
Original line number Diff line number Diff line
@@ -1033,6 +1033,51 @@ static void test_map_parallel(void) 
	assert(bpf_map_get_next_key(fd, &key, &key) == -1 && errno == ENOENT);

}



static void test_map_rdonly(void)

{

	int i, fd, key = 0, value = 0;



	fd = bpf_create_map(BPF_MAP_TYPE_HASH, sizeof(key), sizeof(value),

			    MAP_SIZE, map_flags | BPF_F_RDONLY);

	if (fd < 0) {

		printf("Failed to create map for read only test '%s'!\n",

		       strerror(errno));

		exit(1);

	}



	key = 1;

	value = 1234;

	/* Insert key=1 element. */

	assert(bpf_map_update_elem(fd, &key, &value, BPF_ANY) == -1 &&

	       errno == EPERM);



	/* Check that key=2 is not found. */

	assert(bpf_map_lookup_elem(fd, &key, &value) == -1 && errno == ENOENT);

	assert(bpf_map_get_next_key(fd, &key, &value) == -1 && errno == ENOENT);

}



static void test_map_wronly(void)

{

	int i, fd, key = 0, value = 0;



	fd = bpf_create_map(BPF_MAP_TYPE_HASH, sizeof(key), sizeof(value),

			    MAP_SIZE, map_flags | BPF_F_WRONLY);

	if (fd < 0) {

		printf("Failed to create map for read only test '%s'!\n",

		       strerror(errno));

		exit(1);

	}



	key = 1;

	value = 1234;

	/* Insert key=1 element. */

	assert(bpf_map_update_elem(fd, &key, &value, BPF_ANY) == 0)



	/* Check that key=2 is not found. */

	assert(bpf_map_lookup_elem(fd, &key, &value) == -1 && errno == EPERM);

	assert(bpf_map_get_next_key(fd, &key, &value) == -1 && errno == EPERM);

}



static void run_all_tests(void)

{

	test_hashmap(0, NULL);
@@ -1050,6 +1095,9 @@ static void run_all_tests(void) 
	test_map_large();

	test_map_parallel();

	test_map_stress();



	test_map_rdonly();

	test_map_wronly();

}



int main(void)