1 files changed, 149 insertions, 34 deletions

diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
index c52f99f6a909..d1e32e792536 100644
--- a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
+++ b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
@@ -3,6 +3,7 @@
 #include <test_progs.h>
 #include <network_helpers.h>
 #include <bpf/btf.h>
+#include "bind4_prog.skel.h"
 
 typedef int (*test_cb)(struct bpf_object *obj);
 
@@ -58,12 +59,17 @@ static void test_fexit_bpf2bpf_common(const char *obj_file,
 				      test_cb cb)
 {
 	struct bpf_object *obj = NULL, *tgt_obj;
-	__u32 retval, tgt_prog_id, info_len;
+	__u32 tgt_prog_id, info_len;
 	struct bpf_prog_info prog_info = {};
 	struct bpf_program **prog = NULL, *p;
 	struct bpf_link **link = NULL;
 	int err, tgt_fd, i;
 	struct btf *btf;
+	LIBBPF_OPTS(bpf_test_run_opts, topts,
+		.data_in = &pkt_v6,
+		.data_size_in = sizeof(pkt_v6),
+		.repeat = 1,
+	);
 
 	err = bpf_prog_test_load(target_obj_file, BPF_PROG_TYPE_UNSPEC,
 			    &tgt_obj, &tgt_fd);
@@ -132,7 +138,7 @@ static void test_fexit_bpf2bpf_common(const char *obj_file,
 					     &link_info, &info_len);
 		ASSERT_OK(err, "link_fd_get_info");
 		ASSERT_EQ(link_info.tracing.attach_type,
-			  bpf_program__get_expected_attach_type(prog[i]),
+			  bpf_program__expected_attach_type(prog[i]),
 			  "link_attach_type");
 		ASSERT_EQ(link_info.tracing.target_obj_id, tgt_prog_id, "link_tgt_obj_id");
 		ASSERT_EQ(link_info.tracing.target_btf_id, btf_id, "link_tgt_btf_id");
@@ -147,10 +153,9 @@ static void test_fexit_bpf2bpf_common(const char *obj_file,
 	if (!run_prog)
 		goto close_prog;
 
-	err = bpf_prog_test_run(tgt_fd, 1, &pkt_v6, sizeof(pkt_v6),
-				NULL, NULL, &retval, NULL);
+	err = bpf_prog_test_run_opts(tgt_fd, &topts);
 	ASSERT_OK(err, "prog_run");
-	ASSERT_EQ(retval, 0, "prog_run_ret");
+	ASSERT_EQ(topts.retval, 0, "prog_run_ret");
 
 	if (check_data_map(obj, prog_cnt, false))
 		goto close_prog;
@@ -169,8 +174,8 @@ static void test_target_no_callees(void)
 	const char *prog_name[] = {
 		"fexit/test_pkt_md_access",
 	};
-	test_fexit_bpf2bpf_common("./fexit_bpf2bpf_simple.o",
-				  "./test_pkt_md_access.o",
+	test_fexit_bpf2bpf_common("./fexit_bpf2bpf_simple.bpf.o",
+				  "./test_pkt_md_access.bpf.o",
 				  ARRAY_SIZE(prog_name),
 				  prog_name, true, NULL);
 }
@@ -183,8 +188,8 @@ static void test_target_yes_callees(void)
 		"fexit/test_pkt_access_subprog2",
 		"fexit/test_pkt_access_subprog3",
 	};
-	test_fexit_bpf2bpf_common("./fexit_bpf2bpf.o",
-				  "./test_pkt_access.o",
+	test_fexit_bpf2bpf_common("./fexit_bpf2bpf.bpf.o",
+				  "./test_pkt_access.bpf.o",
 				  ARRAY_SIZE(prog_name),
 				  prog_name, true, NULL);
 }
@@ -201,8 +206,8 @@ static void test_func_replace(void)
 		"freplace/get_constant",
 		"freplace/test_pkt_write_access_subprog",
 	};
-	test_fexit_bpf2bpf_common("./fexit_bpf2bpf.o",
-				  "./test_pkt_access.o",
+	test_fexit_bpf2bpf_common("./fexit_bpf2bpf.bpf.o",
+				  "./test_pkt_access.bpf.o",
 				  ARRAY_SIZE(prog_name),
 				  prog_name, true, NULL);
 }
@@ -212,8 +217,8 @@ static void test_func_replace_verify(void)
 	const char *prog_name[] = {
 		"freplace/do_bind",
 	};
-	test_fexit_bpf2bpf_common("./freplace_connect4.o",
-				  "./connect4_prog.o",
+	test_fexit_bpf2bpf_common("./freplace_connect4.bpf.o",
+				  "./connect4_prog.bpf.o",
 				  ARRAY_SIZE(prog_name),
 				  prog_name, false, NULL);
 }
@@ -222,32 +227,34 @@ static int test_second_attach(struct bpf_object *obj)
 {
 	const char *prog_name = "security_new_get_constant";
 	const char *tgt_name = "get_constant";
-	const char *tgt_obj_file = "./test_pkt_access.o";
+	const char *tgt_obj_file = "./test_pkt_access.bpf.o";
 	struct bpf_program *prog = NULL;
 	struct bpf_object *tgt_obj;
-	__u32 duration = 0, retval;
 	struct bpf_link *link;
 	int err = 0, tgt_fd;
+	LIBBPF_OPTS(bpf_test_run_opts, topts,
+		.data_in = &pkt_v6,
+		.data_size_in = sizeof(pkt_v6),
+		.repeat = 1,
+	);
 
 	prog = bpf_object__find_program_by_name(obj, prog_name);
-	if (CHECK(!prog, "find_prog", "prog %s not found\n", prog_name))
+	if (!ASSERT_OK_PTR(prog, "find_prog"))
 		return -ENOENT;
 
 	err = bpf_prog_test_load(tgt_obj_file, BPF_PROG_TYPE_UNSPEC,
 			    &tgt_obj, &tgt_fd);
-	if (CHECK(err, "second_prog_load", "file %s err %d errno %d\n",
-		  tgt_obj_file, err, errno))
+	if (!ASSERT_OK(err, "second_prog_load"))
 		return err;
 
 	link = bpf_program__attach_freplace(prog, tgt_fd, tgt_name);
 	if (!ASSERT_OK_PTR(link, "second_link"))
 		goto out;
 
-	err = bpf_prog_test_run(tgt_fd, 1, &pkt_v6, sizeof(pkt_v6),
-				NULL, NULL, &retval, &duration);
-	if (CHECK(err || retval, "ipv6",
-		  "err %d errno %d retval %d duration %d\n",
-		  err, errno, retval, duration))
+	err = bpf_prog_test_run_opts(tgt_fd, &topts);
+	if (!ASSERT_OK(err, "ipv6 test_run"))
+		goto out;
+	if (!ASSERT_OK(topts.retval, "ipv6 retval"))
 		goto out;
 
 	err = check_data_map(obj, 1, true);
@@ -265,8 +272,8 @@ static void test_func_replace_multi(void)
 	const char *prog_name[] = {
 		"freplace/get_constant",
 	};
-	test_fexit_bpf2bpf_common("./freplace_get_constant.o",
-				  "./test_pkt_access.o",
+	test_fexit_bpf2bpf_common("./freplace_get_constant.bpf.o",
+				  "./test_pkt_access.bpf.o",
 				  ARRAY_SIZE(prog_name),
 				  prog_name, true, test_second_attach);
 }
@@ -274,10 +281,10 @@ static void test_func_replace_multi(void)
 static void test_fmod_ret_freplace(void)
 {
 	struct bpf_object *freplace_obj = NULL, *pkt_obj, *fmod_obj = NULL;
-	const char *freplace_name = "./freplace_get_constant.o";
-	const char *fmod_ret_name = "./fmod_ret_freplace.o";
+	const char *freplace_name = "./freplace_get_constant.bpf.o";
+	const char *fmod_ret_name = "./fmod_ret_freplace.bpf.o";
 	DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts);
-	const char *tgt_name = "./test_pkt_access.o";
+	const char *tgt_name = "./test_pkt_access.bpf.o";
 	struct bpf_link *freplace_link = NULL;
 	struct bpf_program *prog;
 	__u32 duration = 0;
@@ -332,8 +339,8 @@ static void test_func_sockmap_update(void)
 	const char *prog_name[] = {
 		"freplace/cls_redirect",
 	};
-	test_fexit_bpf2bpf_common("./freplace_cls_redirect.o",
-				  "./test_cls_redirect.o",
+	test_fexit_bpf2bpf_common("./freplace_cls_redirect.bpf.o",
+				  "./test_cls_redirect.bpf.o",
 				  ARRAY_SIZE(prog_name),
 				  prog_name, false, NULL);
 }
@@ -378,15 +385,119 @@ close_prog:
 static void test_func_replace_return_code(void)
 {
 	/* test invalid return code in the replaced program */
-	test_obj_load_failure_common("./freplace_connect_v4_prog.o",
-				     "./connect4_prog.o");
+	test_obj_load_failure_common("./freplace_connect_v4_prog.bpf.o",
+				     "./connect4_prog.bpf.o");
 }
 
 static void test_func_map_prog_compatibility(void)
 {
 	/* test with spin lock map value in the replaced program */
-	test_obj_load_failure_common("./freplace_attach_probe.o",
-				     "./test_attach_probe.o");
+	test_obj_load_failure_common("./freplace_attach_probe.bpf.o",
+				     "./test_attach_probe.bpf.o");
+}
+
+static void test_func_replace_global_func(void)
+{
+	const char *prog_name[] = {
+		"freplace/test_pkt_access",
+	};
+
+	test_fexit_bpf2bpf_common("./freplace_global_func.bpf.o",
+				  "./test_pkt_access.bpf.o",
+				  ARRAY_SIZE(prog_name),
+				  prog_name, false, NULL);
+}
+
+static int find_prog_btf_id(const char *name, __u32 attach_prog_fd)
+{
+	struct bpf_prog_info info = {};
+	__u32 info_len = sizeof(info);
+	struct btf *btf;
+	int ret;
+
+	ret = bpf_obj_get_info_by_fd(attach_prog_fd, &info, &info_len);
+	if (ret)
+		return ret;
+
+	if (!info.btf_id)
+		return -EINVAL;
+
+	btf = btf__load_from_kernel_by_id(info.btf_id);
+	ret = libbpf_get_error(btf);
+	if (ret)
+		return ret;
+
+	ret = btf__find_by_name_kind(btf, name, BTF_KIND_FUNC);
+	btf__free(btf);
+	return ret;
+}
+
+static int load_fentry(int attach_prog_fd, int attach_btf_id)
+{
+	LIBBPF_OPTS(bpf_prog_load_opts, opts,
+		    .expected_attach_type = BPF_TRACE_FENTRY,
+		    .attach_prog_fd = attach_prog_fd,
+		    .attach_btf_id = attach_btf_id,
+	);
+	struct bpf_insn insns[] = {
+		BPF_MOV64_IMM(BPF_REG_0, 0),
+		BPF_EXIT_INSN(),
+	};
+
+	return bpf_prog_load(BPF_PROG_TYPE_TRACING,
+			     "bind4_fentry",
+			     "GPL",
+			     insns,
+			     ARRAY_SIZE(insns),
+			     &opts);
+}
+
+static void test_fentry_to_cgroup_bpf(void)
+{
+	struct bind4_prog *skel = NULL;
+	struct bpf_prog_info info = {};
+	__u32 info_len = sizeof(info);
+	int cgroup_fd = -1;
+	int fentry_fd = -1;
+	int btf_id;
+
+	cgroup_fd = test__join_cgroup("/fentry_to_cgroup_bpf");
+	if (!ASSERT_GE(cgroup_fd, 0, "cgroup_fd"))
+		return;
+
+	skel = bind4_prog__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "skel"))
+		goto cleanup;
+
+	skel->links.bind_v4_prog = bpf_program__attach_cgroup(skel->progs.bind_v4_prog, cgroup_fd);
+	if (!ASSERT_OK_PTR(skel->links.bind_v4_prog, "bpf_program__attach_cgroup"))
+		goto cleanup;
+
+	btf_id = find_prog_btf_id("bind_v4_prog", bpf_program__fd(skel->progs.bind_v4_prog));
+	if (!ASSERT_GE(btf_id, 0, "find_prog_btf_id"))
+		goto cleanup;
+
+	fentry_fd = load_fentry(bpf_program__fd(skel->progs.bind_v4_prog), btf_id);
+	if (!ASSERT_GE(fentry_fd, 0, "load_fentry"))
+		goto cleanup;
+
+	/* Make sure bpf_obj_get_info_by_fd works correctly when attaching
+	 * to another BPF program.
+	 */
+
+	ASSERT_OK(bpf_obj_get_info_by_fd(fentry_fd, &info, &info_len),
+		  "bpf_obj_get_info_by_fd");
+
+	ASSERT_EQ(info.btf_id, 0, "info.btf_id");
+	ASSERT_EQ(info.attach_btf_id, btf_id, "info.attach_btf_id");
+	ASSERT_GT(info.attach_btf_obj_id, 0, "info.attach_btf_obj_id");
+
+cleanup:
+	if (cgroup_fd >= 0)
+		close(cgroup_fd);
+	if (fentry_fd >= 0)
+		close(fentry_fd);
+	bind4_prog__destroy(skel);
 }
 
 /* NOTE: affect other tests, must run in serial mode */
@@ -410,4 +521,8 @@ void serial_test_fexit_bpf2bpf(void)
 		test_func_replace_multi();
 	if (test__start_subtest("fmod_ret_freplace"))
 		test_fmod_ret_freplace();
+	if (test__start_subtest("func_replace_global_func"))
+		test_func_replace_global_func();
+	if (test__start_subtest("fentry_to_cgroup_bpf"))
+		test_fentry_to_cgroup_bpf();
 }