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bpf: lru: Add test_lru_sanity6 for BPF_F_NO_COMMON_LRU

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test_lru_sanity3 is not applicable to BPF_F_NO_COMMON_LRU.
It just happens to work when PERCPU_FREE_TARGET == 16.

This patch:
1) Disable test_lru_sanity3 for BPF_F_NO_COMMON_LRU
2) Add test_lru_sanity6 to test list rotation for
   the BPF_F_NO_COMMON_LRU map.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin KaFai Lau 2017-04-14 10:30:25 -07:00 committed by David S. Miller
parent 82960fff09
commit 9746f85686
1 changed files with 65 additions and 5 deletions
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70
tools/testing/selftests/bpf/test_lru_map.c
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@ -387,6 +387,10 @@ static void test_lru_sanity3(int map_type, int map_flags, unsigned int tgt_free)
unsigned int map_size;
int next_cpu = 0;
if (map_flags & BPF_F_NO_COMMON_LRU)
/* This test is only applicable to common LRU list */
return;
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
map_flags);
@ -396,11 +400,7 @@ static void test_lru_sanity3(int map_type, int map_flags, unsigned int tgt_free)
assert(batch_size * 2 == tgt_free);
map_size = tgt_free * 2;
if (map_flags & BPF_F_NO_COMMON_LRU)
lru_map_fd = create_map(map_type, map_flags,
map_size * nr_cpus);
else
lru_map_fd = create_map(map_type, map_flags, map_size);
lru_map_fd = create_map(map_type, map_flags, map_size);
assert(lru_map_fd != -1);
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, map_size);
@ -566,6 +566,65 @@ static void test_lru_sanity5(int map_type, int map_flags)
printf("Pass\n");
}
/* Test list rotation for BPF_F_NO_COMMON_LRU map */
static void test_lru_sanity6(int map_type, int map_flags, int tgt_free)
{
int lru_map_fd, expected_map_fd;
unsigned long long key, value[nr_cpus];
unsigned int map_size = tgt_free * 2;
int next_cpu = 0;
if (!(map_flags & BPF_F_NO_COMMON_LRU))
return;
printf("%s (map_type:%d map_flags:0x%X): ", __func__, map_type,
map_flags);
assert(sched_next_online(0, &next_cpu) != -1);
expected_map_fd = create_map(BPF_MAP_TYPE_HASH, 0, map_size);
assert(expected_map_fd != -1);
lru_map_fd = create_map(map_type, map_flags, map_size * nr_cpus);
assert(lru_map_fd != -1);
value[0] = 1234;
for (key = 1; key <= tgt_free; key++) {
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
BPF_NOEXIST));
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
BPF_NOEXIST));
}
for (; key <= tgt_free * 2; key++) {
unsigned long long stable_key;
/* Make ref bit sticky for key: [1, tgt_free] */
for (stable_key = 1; stable_key <= tgt_free; stable_key++) {
/* Mark the ref bit */
assert(!bpf_map_lookup_elem(lru_map_fd, &stable_key,
value));
}
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
BPF_NOEXIST));
}
for (; key <= tgt_free * 3; key++) {
assert(!bpf_map_update_elem(lru_map_fd, &key, value,
BPF_NOEXIST));
assert(!bpf_map_update_elem(expected_map_fd, &key, value,
BPF_NOEXIST));
}
assert(map_equal(lru_map_fd, expected_map_fd));
close(expected_map_fd);
close(lru_map_fd);
printf("Pass\n");
}
int main(int argc, char **argv)
{
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
@ -593,6 +652,7 @@ int main(int argc, char **argv)
test_lru_sanity3(map_types[t], map_flags[f], tgt_free);
test_lru_sanity4(map_types[t], map_flags[f], tgt_free);
test_lru_sanity5(map_types[t], map_flags[f]);
test_lru_sanity6(map_types[t], map_flags[f], tgt_free);
printf("\n");
}