From 8d7cb74f2ccb5486ab8c631a8fcdc7621bbbc42c Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Tue, 30 Mar 2021 19:32:37 -0700 Subject: 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 Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20210331023237.41094-17-xiyou.wangcong@gmail.com --- .../selftests/bpf/prog_tests/sockmap_basic.c | 40 ++++++++++++++++++++++ .../bpf/progs/test_sockmap_skb_verdict_attach.c | 18 ++++++++++ 2 files changed, 58 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/test_sockmap_skb_verdict_attach.c (limited to 'tools/testing/selftests/bpf') 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 + +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"; -- cgit v1.2.3