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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/bpf/prog_tests/probe_user.c
parentInitial commit. (diff)
downloadlinux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz
linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip
Adding upstream version 5.10.209.upstream/5.10.209
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/probe_user.c')
-rw-r--r--tools/testing/selftests/bpf/prog_tests/probe_user.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/probe_user.c b/tools/testing/selftests/bpf/prog_tests/probe_user.c
new file mode 100644
index 000000000..7aecfd9e8
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/probe_user.c
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+
+void test_probe_user(void)
+{
+ const char *prog_name = "kprobe/__sys_connect";
+ const char *obj_file = "./test_probe_user.o";
+ DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts, );
+ int err, results_map_fd, sock_fd, duration = 0;
+ struct sockaddr curr, orig, tmp;
+ struct sockaddr_in *in = (struct sockaddr_in *)&curr;
+ struct bpf_link *kprobe_link = NULL;
+ struct bpf_program *kprobe_prog;
+ struct bpf_object *obj;
+ static const int zero = 0;
+
+ obj = bpf_object__open_file(obj_file, &opts);
+ if (CHECK(IS_ERR(obj), "obj_open_file", "err %ld\n", PTR_ERR(obj)))
+ return;
+
+ kprobe_prog = bpf_object__find_program_by_title(obj, prog_name);
+ if (CHECK(!kprobe_prog, "find_probe",
+ "prog '%s' not found\n", prog_name))
+ goto cleanup;
+
+ err = bpf_object__load(obj);
+ if (CHECK(err, "obj_load", "err %d\n", err))
+ goto cleanup;
+
+ results_map_fd = bpf_find_map(__func__, obj, "test_pro.bss");
+ if (CHECK(results_map_fd < 0, "find_bss_map",
+ "err %d\n", results_map_fd))
+ goto cleanup;
+
+ kprobe_link = bpf_program__attach(kprobe_prog);
+ if (CHECK(IS_ERR(kprobe_link), "attach_kprobe",
+ "err %ld\n", PTR_ERR(kprobe_link))) {
+ kprobe_link = NULL;
+ goto cleanup;
+ }
+
+ memset(&curr, 0, sizeof(curr));
+ in->sin_family = AF_INET;
+ in->sin_port = htons(5555);
+ in->sin_addr.s_addr = inet_addr("255.255.255.255");
+ memcpy(&orig, &curr, sizeof(curr));
+
+ sock_fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (CHECK(sock_fd < 0, "create_sock_fd", "err %d\n", sock_fd))
+ goto cleanup;
+
+ connect(sock_fd, &curr, sizeof(curr));
+ close(sock_fd);
+
+ err = bpf_map_lookup_elem(results_map_fd, &zero, &tmp);
+ if (CHECK(err, "get_kprobe_res",
+ "failed to get kprobe res: %d\n", err))
+ goto cleanup;
+
+ in = (struct sockaddr_in *)&tmp;
+ if (CHECK(memcmp(&tmp, &orig, sizeof(orig)), "check_kprobe_res",
+ "wrong kprobe res from probe read: %s:%u\n",
+ inet_ntoa(in->sin_addr), ntohs(in->sin_port)))
+ goto cleanup;
+
+ memset(&tmp, 0xab, sizeof(tmp));
+
+ in = (struct sockaddr_in *)&curr;
+ if (CHECK(memcmp(&curr, &tmp, sizeof(tmp)), "check_kprobe_res",
+ "wrong kprobe res from probe write: %s:%u\n",
+ inet_ntoa(in->sin_addr), ntohs(in->sin_port)))
+ goto cleanup;
+cleanup:
+ bpf_link__destroy(kprobe_link);
+ bpf_object__close(obj);
+}