Revert "selftests/bpf: Add a cgroup prog bpf_get_ns_current_pid_tgid() test"

This reverts commit 4730b07.

The test depends on commit eb166e5 "bpf: Allow helper
bpf_get_[ns_]current_pid_tgid() for all prog types", which was not part of the
stable 6.6 code base, and thus the test will fail. Revert it since it is a
false positive.

Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: shunghsiyu

tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c

@@ -12,7 +12,6 @@
 #include <sys/wait.h>
 #include <sys/mount.h>
 #include <fcntl.h>
-#include "network_helpers.h"
 
 #define STACK_SIZE (1024 * 1024)
 static char child_stack[STACK_SIZE];
@@ -75,50 +74,6 @@ static int test_current_pid_tgid_tp(void *args)
 	return ret;
 }
 
-static int test_current_pid_tgid_cgrp(void *args)
-{
-	struct test_ns_current_pid_tgid__bss *bss;
-	struct test_ns_current_pid_tgid *skel;
-	int server_fd = -1, ret = -1, err;
-	int cgroup_fd = *(int *)args;
-	pid_t tgid, pid;
-
-	skel = test_ns_current_pid_tgid__open();
-	if (!ASSERT_OK_PTR(skel, "test_ns_current_pid_tgid__open"))
-		return ret;
-
-	bpf_program__set_autoload(skel->progs.cgroup_bind4, true);
-
-	err = test_ns_current_pid_tgid__load(skel);
-	if (!ASSERT_OK(err, "test_ns_current_pid_tgid__load"))
-		goto cleanup;
-
-	bss = skel->bss;
-	if (get_pid_tgid(&pid, &tgid, bss))
-		goto cleanup;
-
-	skel->links.cgroup_bind4 = bpf_program__attach_cgroup(
-		skel->progs.cgroup_bind4, cgroup_fd);
-	if (!ASSERT_OK_PTR(skel->links.cgroup_bind4, "bpf_program__attach_cgroup"))
-		goto cleanup;
-
-	server_fd = start_server(AF_INET, SOCK_STREAM, NULL, 0, 0);
-	if (!ASSERT_GE(server_fd, 0, "start_server"))
-		goto cleanup;
-
-	if (!ASSERT_EQ(bss->user_pid, pid, "pid"))
-		goto cleanup;
-	if (!ASSERT_EQ(bss->user_tgid, tgid, "tgid"))
-		goto cleanup;
-	ret = 0;
-
-cleanup:
-	if (server_fd >= 0)
-		close(server_fd);
-	test_ns_current_pid_tgid__destroy(skel);
-	return ret;
-}
-
 static void test_ns_current_pid_tgid_new_ns(int (*fn)(void *), void *arg)
 {
 	int wstatus;
@@ -140,39 +95,11 @@ static void test_ns_current_pid_tgid_new_ns(int (*fn)(void *), void *arg)
 		return;
 }
 
-static void test_in_netns(int (*fn)(void *), void *arg)
-{
-	struct nstoken *nstoken = NULL;
-
-	SYS(cleanup, "ip netns add ns_current_pid_tgid");
-	SYS(cleanup, "ip -net ns_current_pid_tgid link set dev lo up");
-
-	nstoken = open_netns("ns_current_pid_tgid");
-	if (!ASSERT_OK_PTR(nstoken, "open_netns"))
-		goto cleanup;
-
-	test_ns_current_pid_tgid_new_ns(fn, arg);
-
-cleanup:
-	if (nstoken)
-		close_netns(nstoken);
-	SYS_NOFAIL("ip netns del ns_current_pid_tgid");
-}
-
 /* TODO: use a different tracepoint */
 void serial_test_ns_current_pid_tgid(void)
 {
 	if (test__start_subtest("root_ns_tp"))
 		test_current_pid_tgid_tp(NULL);
 	if (test__start_subtest("new_ns_tp"))
 		test_ns_current_pid_tgid_new_ns(test_current_pid_tgid_tp, NULL);
-	if (test__start_subtest("new_ns_cgrp")) {
-		int cgroup_fd = -1;
-
-		cgroup_fd = test__join_cgroup("/sock_addr");
-		if (ASSERT_GE(cgroup_fd, 0, "join_cgroup")) {
-			test_in_netns(test_current_pid_tgid_cgrp, &cgroup_fd);
-			close(cgroup_fd);
-		}
-	}
 }

tools/testing/selftests/bpf/progs/test_ns_current_pid_tgid.c

@@ -28,11 +28,4 @@ int tp_handler(const void *ctx)
 	return 0;
 }
 
-SEC("?cgroup/bind4")
-int cgroup_bind4(struct bpf_sock_addr *ctx)
-{
-	get_pid_tgid();
-	return 1;
-}
-
 char _license[] SEC("license") = "GPL";