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authorStanislav Fomichev <sdf@google.com>2020-07-28 17:31:04 -0700
committerDaniel Borkmann <daniel@iogearbox.net>2020-07-31 00:43:49 +0200
commit4fb5f94911405b6d2645d4384c2ae1215bfc6a76 (patch)
tree559cbecd39ec5ab9b2b8cf333dd6ebb3dafce578
parentf7c6cb1d9728dea9d9f131ef57303d6821afb0f8 (diff)
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selftests/bpf: Verify socket storage in cgroup/sock_{create, release}
Augment udp_limit test to set and verify socket storage value. That should be enough to exercise the changes from the previous patch. Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20200729003104.1280813-2-sdf@google.com
-rw-r--r--tools/testing/selftests/bpf/progs/udp_limit.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/udp_limit.c b/tools/testing/selftests/bpf/progs/udp_limit.c
index 8429b22525a7..165e3c2dd9a3 100644
--- a/tools/testing/selftests/bpf/progs/udp_limit.c
+++ b/tools/testing/selftests/bpf/progs/udp_limit.c
@@ -6,14 +6,28 @@
int invocations = 0, in_use = 0;
+struct {
+ __uint(type, BPF_MAP_TYPE_SK_STORAGE);
+ __uint(map_flags, BPF_F_NO_PREALLOC);
+ __type(key, int);
+ __type(value, int);
+} sk_map SEC(".maps");
+
SEC("cgroup/sock_create")
int sock(struct bpf_sock *ctx)
{
+ int *sk_storage;
__u32 key;
if (ctx->type != SOCK_DGRAM)
return 1;
+ sk_storage = bpf_sk_storage_get(&sk_map, ctx, 0,
+ BPF_SK_STORAGE_GET_F_CREATE);
+ if (!sk_storage)
+ return 0;
+ *sk_storage = 0xdeadbeef;
+
__sync_fetch_and_add(&invocations, 1);
if (in_use > 0) {
@@ -31,11 +45,16 @@ int sock(struct bpf_sock *ctx)
SEC("cgroup/sock_release")
int sock_release(struct bpf_sock *ctx)
{
+ int *sk_storage;
__u32 key;
if (ctx->type != SOCK_DGRAM)
return 1;
+ sk_storage = bpf_sk_storage_get(&sk_map, ctx, 0, 0);
+ if (!sk_storage || *sk_storage != 0xdeadbeef)
+ return 0;
+
__sync_fetch_and_add(&invocations, 1);
__sync_fetch_and_add(&in_use, -1);
return 1;