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2024-02-19 1c055e55a242a33e574e48be530e06770a210dcd

 kernel/tools/testing/selftests/bpf/prog_tests/sk_assign.c
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@@ -29,7 +29,23 @@
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 static bool
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 configure_stack(void)
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 {
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+	char tc_version[128];
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 	char tc_cmd[BUFSIZ];
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+	char *prog;
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+	FILE *tc;
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+
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+	/* Check whether tc is built with libbpf. */
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+	tc = popen("tc -V", "r");
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+	if (CHECK_FAIL(!tc))
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+		return false;
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+	if (CHECK_FAIL(!fgets(tc_version, sizeof(tc_version), tc)))
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+		return false;
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+	if (strstr(tc_version, ", libbpf "))
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+		prog = "test_sk_assign_libbpf.o";
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+	else
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+		prog = "test_sk_assign.o";
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+	if (CHECK_FAIL(pclose(tc)))
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+		return false;
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 	/* Move to a new networking namespace */
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 	if (CHECK_FAIL(unshare(CLONE_NEWNET)))
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@@ -46,8 +62,8 @@
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 	/* Load qdisc, BPF program */
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 	if (CHECK_FAIL(system("tc qdisc add dev lo clsact")))
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 		return false;
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-	sprintf(tc_cmd, "%s %s %s %s", "tc filter add dev lo ingress bpf",
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-		       "direct-action object-file ./test_sk_assign.o",
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+	sprintf(tc_cmd, "%s %s %s %s %s", "tc filter add dev lo ingress bpf",
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+		       "direct-action object-file", prog,
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 		       "section classifier/sk_assign_test",
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 		       (env.verbosity < VERBOSE_VERY) ? " 2>/dev/null" : "verbose");
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 	if (CHECK(system(tc_cmd), "BPF load failed;",
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@@ -129,15 +145,12 @@
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 static ssize_t
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 rcv_msg(int srv_client, int type)
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 {
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-	struct sockaddr_storage ss;
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 	char buf[BUFSIZ];
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-	socklen_t slen;
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 	if (type == SOCK_STREAM)
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 		return read(srv_client, &buf, sizeof(buf));
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 	else
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-		return recvfrom(srv_client, &buf, sizeof(buf), 0,
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-				(struct sockaddr *)&ss, &slen);
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+		return recvfrom(srv_client, &buf, sizeof(buf), 0, NULL, NULL);
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 }
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 static int