selftests/bpf: Test libbpf_{prog,attach}_type_by_name

Add selftest for libbpf functions libbpf_prog_type_by_name and
libbpf_attach_type_by_name.

Example of output:
  % ./tools/testing/selftests/bpf/test_section_names
  Summary: 35 PASSED, 0 FAILED

Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index fd3851d5c07921caccbca2127afde286935fa1b5..059d64a0f897b94897d51fc122f9327af6c51ea6 100644 (file)
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -23,7 +23,7 @@ $(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
        test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
        test_sock test_btf test_sockmap test_lirc_mode2_user get_cgroup_id_user \
-       test_socket_cookie test_cgroup_storage test_select_reuseport
+       test_socket_cookie test_cgroup_storage test_select_reuseport test_section_names
 
 TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \
        test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o     \

diff --git a/tools/testing/selftests/bpf/test_section_names.c b/tools/testing/selftests/bpf/test_section_names.c
new file mode 100644 (file)
index 0000000..7c4f415
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_section_names.c
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2018 Facebook
+
+#include <err.h>
+#include <bpf/libbpf.h>
+
+#include "bpf_util.h"
+
+struct sec_name_test {
+       const char sec_name[32];
+       struct {
+               int rc;
+               enum bpf_prog_type prog_type;
+               enum bpf_attach_type expected_attach_type;
+       } expected_load;
+       struct {
+               int rc;
+               enum bpf_attach_type attach_type;
+       } expected_attach;
+};
+
+static struct sec_name_test tests[] = {
+       {"InvAliD", {-EINVAL, 0, 0}, {-EINVAL, 0} },
+       {"cgroup", {-EINVAL, 0, 0}, {-EINVAL, 0} },
+       {"socket", {0, BPF_PROG_TYPE_SOCKET_FILTER, 0}, {-EINVAL, 0} },
+       {"kprobe/", {0, BPF_PROG_TYPE_KPROBE, 0}, {-EINVAL, 0} },
+       {"kretprobe/", {0, BPF_PROG_TYPE_KPROBE, 0}, {-EINVAL, 0} },
+       {"classifier", {0, BPF_PROG_TYPE_SCHED_CLS, 0}, {-EINVAL, 0} },
+       {"action", {0, BPF_PROG_TYPE_SCHED_ACT, 0}, {-EINVAL, 0} },
+       {"tracepoint/", {0, BPF_PROG_TYPE_TRACEPOINT, 0}, {-EINVAL, 0} },
+       {
+               "raw_tracepoint/",
+               {0, BPF_PROG_TYPE_RAW_TRACEPOINT, 0},
+               {-EINVAL, 0},
+       },
+       {"xdp", {0, BPF_PROG_TYPE_XDP, 0}, {-EINVAL, 0} },
+       {"perf_event", {0, BPF_PROG_TYPE_PERF_EVENT, 0}, {-EINVAL, 0} },
+       {"lwt_in", {0, BPF_PROG_TYPE_LWT_IN, 0}, {-EINVAL, 0} },
+       {"lwt_out", {0, BPF_PROG_TYPE_LWT_OUT, 0}, {-EINVAL, 0} },
+       {"lwt_xmit", {0, BPF_PROG_TYPE_LWT_XMIT, 0}, {-EINVAL, 0} },
+       {"lwt_seg6local", {0, BPF_PROG_TYPE_LWT_SEG6LOCAL, 0}, {-EINVAL, 0} },
+       {
+               "cgroup_skb/ingress",
+               {0, BPF_PROG_TYPE_CGROUP_SKB, 0},
+               {0, BPF_CGROUP_INET_INGRESS},
+       },
+       {
+               "cgroup_skb/egress",
+               {0, BPF_PROG_TYPE_CGROUP_SKB, 0},
+               {0, BPF_CGROUP_INET_EGRESS},
+       },
+       {"cgroup/skb", {0, BPF_PROG_TYPE_CGROUP_SKB, 0}, {-EINVAL, 0} },
+       {
+               "cgroup/sock",
+               {0, BPF_PROG_TYPE_CGROUP_SOCK, 0},
+               {0, BPF_CGROUP_INET_SOCK_CREATE},
+       },
+       {
+               "cgroup/post_bind4",
+               {0, BPF_PROG_TYPE_CGROUP_SOCK, BPF_CGROUP_INET4_POST_BIND},
+               {0, BPF_CGROUP_INET4_POST_BIND},
+       },
+       {
+               "cgroup/post_bind6",
+               {0, BPF_PROG_TYPE_CGROUP_SOCK, BPF_CGROUP_INET6_POST_BIND},
+               {0, BPF_CGROUP_INET6_POST_BIND},
+       },
+       {
+               "cgroup/dev",
+               {0, BPF_PROG_TYPE_CGROUP_DEVICE, 0},
+               {0, BPF_CGROUP_DEVICE},
+       },
+       {"sockops", {0, BPF_PROG_TYPE_SOCK_OPS, 0}, {0, BPF_CGROUP_SOCK_OPS} },
+       {
+               "sk_skb/stream_parser",
+               {0, BPF_PROG_TYPE_SK_SKB, 0},
+               {0, BPF_SK_SKB_STREAM_PARSER},
+       },
+       {
+               "sk_skb/stream_verdict",
+               {0, BPF_PROG_TYPE_SK_SKB, 0},
+               {0, BPF_SK_SKB_STREAM_VERDICT},
+       },
+       {"sk_skb", {0, BPF_PROG_TYPE_SK_SKB, 0}, {-EINVAL, 0} },
+       {"sk_msg", {0, BPF_PROG_TYPE_SK_MSG, 0}, {0, BPF_SK_MSG_VERDICT} },
+       {"lirc_mode2", {0, BPF_PROG_TYPE_LIRC_MODE2, 0}, {0, BPF_LIRC_MODE2} },
+       {
+               "flow_dissector",
+               {0, BPF_PROG_TYPE_FLOW_DISSECTOR, 0},
+               {0, BPF_FLOW_DISSECTOR},
+       },
+       {
+               "cgroup/bind4",
+               {0, BPF_PROG_TYPE_CGROUP_SOCK_ADDR, BPF_CGROUP_INET4_BIND},
+               {0, BPF_CGROUP_INET4_BIND},
+       },
+       {
+               "cgroup/bind6",
+               {0, BPF_PROG_TYPE_CGROUP_SOCK_ADDR, BPF_CGROUP_INET6_BIND},
+               {0, BPF_CGROUP_INET6_BIND},
+       },
+       {
+               "cgroup/connect4",
+               {0, BPF_PROG_TYPE_CGROUP_SOCK_ADDR, BPF_CGROUP_INET4_CONNECT},
+               {0, BPF_CGROUP_INET4_CONNECT},
+       },
+       {
+               "cgroup/connect6",
+               {0, BPF_PROG_TYPE_CGROUP_SOCK_ADDR, BPF_CGROUP_INET6_CONNECT},
+               {0, BPF_CGROUP_INET6_CONNECT},
+       },
+       {
+               "cgroup/sendmsg4",
+               {0, BPF_PROG_TYPE_CGROUP_SOCK_ADDR, BPF_CGROUP_UDP4_SENDMSG},
+               {0, BPF_CGROUP_UDP4_SENDMSG},
+       },
+       {
+               "cgroup/sendmsg6",
+               {0, BPF_PROG_TYPE_CGROUP_SOCK_ADDR, BPF_CGROUP_UDP6_SENDMSG},
+               {0, BPF_CGROUP_UDP6_SENDMSG},
+       },
+};
+
+static int test_prog_type_by_name(const struct sec_name_test *test)
+{
+       enum bpf_attach_type expected_attach_type;
+       enum bpf_prog_type prog_type;
+       int rc;
+
+       rc = libbpf_prog_type_by_name(test->sec_name, &prog_type,
+                                     &expected_attach_type);
+
+       if (rc != test->expected_load.rc) {
+               warnx("prog: unexpected rc=%d for %s", rc, test->sec_name);
+               return -1;
+       }
+
+       if (rc)
+               return 0;
+
+       if (prog_type != test->expected_load.prog_type) {
+               warnx("prog: unexpected prog_type=%d for %s", prog_type,
+                     test->sec_name);
+               return -1;
+       }
+
+       if (expected_attach_type != test->expected_load.expected_attach_type) {
+               warnx("prog: unexpected expected_attach_type=%d for %s",
+                     expected_attach_type, test->sec_name);
+               return -1;
+       }
+
+       return 0;
+}
+
+static int test_attach_type_by_name(const struct sec_name_test *test)
+{
+       enum bpf_attach_type attach_type;
+       int rc;
+
+       rc = libbpf_attach_type_by_name(test->sec_name, &attach_type);
+
+       if (rc != test->expected_attach.rc) {
+               warnx("attach: unexpected rc=%d for %s", rc, test->sec_name);
+               return -1;
+       }
+
+       if (rc)
+               return 0;
+
+       if (attach_type != test->expected_attach.attach_type) {
+               warnx("attach: unexpected attach_type=%d for %s", attach_type,
+                     test->sec_name);
+               return -1;
+       }
+
+       return 0;
+}
+
+static int run_test_case(const struct sec_name_test *test)
+{
+       if (test_prog_type_by_name(test))
+               return -1;
+       if (test_attach_type_by_name(test))
+               return -1;
+       return 0;
+}
+
+static int run_tests(void)
+{
+       int passes = 0;
+       int fails = 0;
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(tests); ++i) {
+               if (run_test_case(&tests[i]))
+                       ++fails;
+               else
+                       ++passes;
+       }
+       printf("Summary: %d PASSED, %d FAILED\n", passes, fails);
+       return fails ? -1 : 0;
+}
+
+int main(int argc, char **argv)
+{
+       return run_tests();
+}