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authorCong Wang <cong.wang@bytedance.com>2021-03-31 05:32:37 +0300
committerAlexei Starovoitov <ast@kernel.org>2021-04-01 20:56:14 +0300
commit8d7cb74f2ccb5486ab8c631a8fcdc7621bbbc42c (patch)
treebdcfa87c0cf209ce0de77a4b8cfaec4302e4f10f /tools
parentd6378af615275435ce6e390a538c980ac19b6659 (diff)
downloadlinux-8d7cb74f2ccb5486ab8c631a8fcdc7621bbbc42c.tar.xz
selftests/bpf: Add a test case for loading BPF_SK_SKB_VERDICT
This adds a test case to ensure BPF_SK_SKB_VERDICT and BPF_SK_STREAM_VERDICT will never be attached at the same time. Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210331023237.41094-17-xiyou.wangcong@gmail.com
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/bpf/prog_tests/sockmap_basic.c40
-rw-r--r--tools/testing/selftests/bpf/progs/test_sockmap_skb_verdict_attach.c18
2 files changed, 58 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
index b8b48cac2ac3..ab77596b64e3 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c
@@ -7,6 +7,7 @@
#include "test_skmsg_load_helpers.skel.h"
#include "test_sockmap_update.skel.h"
#include "test_sockmap_invalid_update.skel.h"
+#include "test_sockmap_skb_verdict_attach.skel.h"
#include "bpf_iter_sockmap.skel.h"
#define TCP_REPAIR 19 /* TCP sock is under repair right now */
@@ -281,6 +282,39 @@ out:
bpf_iter_sockmap__destroy(skel);
}
+static void test_sockmap_skb_verdict_attach(enum bpf_attach_type first,
+ enum bpf_attach_type second)
+{
+ struct test_sockmap_skb_verdict_attach *skel;
+ int err, map, verdict;
+
+ skel = test_sockmap_skb_verdict_attach__open_and_load();
+ if (CHECK_FAIL(!skel)) {
+ perror("test_sockmap_skb_verdict_attach__open_and_load");
+ return;
+ }
+
+ verdict = bpf_program__fd(skel->progs.prog_skb_verdict);
+ map = bpf_map__fd(skel->maps.sock_map);
+
+ err = bpf_prog_attach(verdict, map, first, 0);
+ if (CHECK_FAIL(err)) {
+ perror("bpf_prog_attach");
+ goto out;
+ }
+
+ err = bpf_prog_attach(verdict, map, second, 0);
+ assert(err == -1 && errno == EBUSY);
+
+ err = bpf_prog_detach2(verdict, map, first);
+ if (CHECK_FAIL(err)) {
+ perror("bpf_prog_detach2");
+ goto out;
+ }
+out:
+ test_sockmap_skb_verdict_attach__destroy(skel);
+}
+
void test_sockmap_basic(void)
{
if (test__start_subtest("sockmap create_update_free"))
@@ -301,4 +335,10 @@ void test_sockmap_basic(void)
test_sockmap_copy(BPF_MAP_TYPE_SOCKMAP);
if (test__start_subtest("sockhash copy"))
test_sockmap_copy(BPF_MAP_TYPE_SOCKHASH);
+ if (test__start_subtest("sockmap skb_verdict attach")) {
+ test_sockmap_skb_verdict_attach(BPF_SK_SKB_VERDICT,
+ BPF_SK_SKB_STREAM_VERDICT);
+ test_sockmap_skb_verdict_attach(BPF_SK_SKB_STREAM_VERDICT,
+ BPF_SK_SKB_VERDICT);
+ }
}
diff --git a/tools/testing/selftests/bpf/progs/test_sockmap_skb_verdict_attach.c b/tools/testing/selftests/bpf/progs/test_sockmap_skb_verdict_attach.c
new file mode 100644
index 000000000000..2d31f66e4f23
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_sockmap_skb_verdict_attach.c
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+
+struct {
+ __uint(type, BPF_MAP_TYPE_SOCKMAP);
+ __uint(max_entries, 2);
+ __type(key, __u32);
+ __type(value, __u64);
+} sock_map SEC(".maps");
+
+SEC("sk_skb/skb_verdict")
+int prog_skb_verdict(struct __sk_buff *skb)
+{
+ return SK_DROP;
+}
+
+char _license[] SEC("license") = "GPL";