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bpf: Add tests for eBPF file mode

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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: Chenbo Feng <fengc@google.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chenbo Feng 2017-10-18 13:00:23 -07:00 committed by David S. Miller
parent 6e71b04a82
commit e043325b30
1 changed files with 48 additions and 0 deletions
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48
tools/testing/selftests/bpf/test_maps.c
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@ -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)