selfetest/bpf: Make some tests serial

Change tests that often fails in parallel execution mode to serial.
Signed-off-by: Yucong Sun <sunyucong@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211006185619.364369-15-fallentree@fb.com

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

@@ -179,7 +179,7 @@ static void do_bpf_iter_setsockopt(struct bpf_iter_setsockopt *iter_skel,
 	free_fds(est_fds, nr_est);
 }
 
-void test_bpf_iter_setsockopt(void)
+void serial_test_bpf_iter_setsockopt(void)
 {
 	struct bpf_iter_setsockopt *iter_skel = NULL;
 	struct bpf_cubic *cubic_skel = NULL;

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

@@ -3,7 +3,7 @@
 
 #define nr_iters 2
 
-void test_bpf_obj_id(void)
+void serial_test_bpf_obj_id(void)
 {
 	const __u64 array_magic_value = 0xfaceb00c;
 	const __u32 array_key = 0;

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

@@ -363,7 +363,7 @@ static void test_shared(int parent_cgroup_fd, int child_cgroup_fd)
 	cg_storage_multi_shared__destroy(obj);
 }
 
-void test_cg_storage_multi(void)
+void serial_test_cg_storage_multi(void)
 {
 	int parent_cgroup_fd = -1, child_cgroup_fd = -1;
 

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

@@ -21,7 +21,7 @@ static int prog_load(void)
 			       bpf_log_buf, BPF_LOG_BUF_SIZE);
 }
 
-void test_cgroup_attach_autodetach(void)
+void serial_test_cgroup_attach_autodetach(void)
 {
 	__u32 duration = 0, prog_cnt = 4, attach_flags;
 	int allow_prog[2] = {-1};

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

@@ -74,7 +74,7 @@ static int prog_load_cnt(int verdict, int val)
 	return ret;
 }
 
-void test_cgroup_attach_multi(void)
+void serial_test_cgroup_attach_multi(void)
 {
 	__u32 prog_ids[4], prog_cnt = 0, attach_flags, saved_prog_id;
 	int cg1 = 0, cg2 = 0, cg3 = 0, cg4 = 0, cg5 = 0, key = 0;

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

@@ -23,7 +23,7 @@ static int prog_load(int verdict)
 			       bpf_log_buf, BPF_LOG_BUF_SIZE);
 }
 
-void test_cgroup_attach_override(void)
+void serial_test_cgroup_attach_override(void)
 {
 	int drop_prog = -1, allow_prog = -1, foo = -1, bar = -1;
 	__u32 duration = 0;

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

@@ -24,7 +24,7 @@ int ping_and_check(int exp_calls, int exp_alt_calls)
 	return 0;
 }
 
-void test_cgroup_link(void)
+void serial_test_cgroup_link(void)
 {
 	struct {
 		const char *path;

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

@@ -195,7 +195,7 @@ static void test_check_mtu_tc(__u32 mtu, __u32 ifindex)
 	test_check_mtu__destroy(skel);
 }
 
-void test_check_mtu(void)
+void serial_test_check_mtu(void)
 {
 	__u32 mtu_lo;
 

tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c

@@ -380,7 +380,8 @@ static void test_func_map_prog_compatibility(void)
 				     "./test_attach_probe.o");
 }
 
-void test_fexit_bpf2bpf(void)
+/* NOTE: affect other tests, must run in serial mode */
+void serial_test_fexit_bpf2bpf(void)
 {
 	if (test__start_subtest("target_no_callees"))
 		test_target_no_callees();

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

@@ -2,7 +2,7 @@
 #include <test_progs.h>
 #include <network_helpers.h>
 
-void test_flow_dissector_load_bytes(void)
+void serial_test_flow_dissector_load_bytes(void)
 {
 	struct bpf_flow_keys flow_keys;
 	__u32 duration = 0, retval, size;

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

@@ -628,7 +628,7 @@ static void run_tests(int netns)
 	}
 }
 
-void test_flow_dissector_reattach(void)
+void serial_test_flow_dissector_reattach(void)
 {
 	int err, new_net, saved_net;
 

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

@@ -73,7 +73,7 @@ static void close_perf_events(void)
 	free(pfd_array);
 }
 
-void test_get_branch_snapshot(void)
+void serial_test_get_branch_snapshot(void)
 {
 	struct get_branch_snapshot *skel = NULL;
 	int err;

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

@@ -48,7 +48,8 @@ static void on_sample(void *ctx, int cpu, void *data, __u32 size)
 	*(bool *)ctx = true;
 }
 
-void test_kfree_skb(void)
+/* TODO: fix kernel panic caused by this test in parallel mode */
+void serial_test_kfree_skb(void)
 {
 	struct __sk_buff skb = {};
 	struct bpf_prog_test_run_attr tattr = {

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

@@ -541,7 +541,7 @@ static void run_test(struct migrate_reuseport_test_case *test_case,
 	}
 }
 
-void test_migrate_reuseport(void)
+void serial_test_migrate_reuseport(void)
 {
 	struct test_migrate_reuseport *skel;
 	int i;

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

@@ -53,7 +53,8 @@ static void run_test(__u32 input_retval, __u16 want_side_effect, __s16 want_ret)
 	modify_return__destroy(skel);
 }
 
-void test_modify_return(void)
+/* TODO: conflict with get_func_ip_test */
+void serial_test_modify_return(void)
 {
 	run_test(0 /* input_retval */,
 		 1 /* want_side_effect */,

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

@@ -78,7 +78,8 @@ static void test_ns_current_pid_tgid_new_ns(void)
 		return;
 }
 
-void test_ns_current_pid_tgid(void)
+/* TODO: use a different tracepoint */
+void serial_test_ns_current_pid_tgid(void)
 {
 	if (test__start_subtest("ns_current_pid_tgid_root_ns"))
 		test_current_pid_tgid(NULL);

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

@@ -43,7 +43,7 @@ int trigger_on_cpu(int cpu)
 	return 0;
 }
 
-void test_perf_buffer(void)
+void serial_test_perf_buffer(void)
 {
 	int err, on_len, nr_on_cpus = 0, nr_cpus, i;
 	struct perf_buffer_opts pb_opts = {};

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

@@ -23,7 +23,8 @@ static void burn_cpu(void)
 		++j;
 }
 
-void test_perf_link(void)
+/* TODO: often fails in concurrent mode */
+void serial_test_perf_link(void)
 {
 	struct test_perf_link *skel = NULL;
 	struct perf_event_attr attr;

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

 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
 
-void test_probe_user(void)
+/* TODO: corrupts other tests uses connect() */
+void serial_test_probe_user(void)
 {
 	const char *prog_name = "handle_sys_connect";
 	const char *obj_file = "./test_probe_user.o";

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

@@ -3,7 +3,8 @@
 #include <test_progs.h>
 #include <linux/nbd.h>
 
-void test_raw_tp_writable_test_run(void)
+/* NOTE: conflict with other tests. */
+void serial_test_raw_tp_writable_test_run(void)
 {
 	__u32 duration = 0;
 	char error[4096];

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

@@ -858,7 +858,7 @@ void test_map_type(enum bpf_map_type mt)
 	cleanup();
 }
 
-void test_select_reuseport(void)
+void serial_test_select_reuseport(void)
 {
 	saved_tcp_fo = read_int_sysctl(TCP_FO_SYSCTL);
 	if (saved_tcp_fo < 0)

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

@@ -25,7 +25,8 @@ static void *worker(void *p)
 	return NULL;
 }
 
-void test_send_signal_sched_switch(void)
+/* NOTE: cause events loss */
+void serial_test_send_signal_sched_switch(void)
 {
 	struct test_send_signal_kern *skel;
 	pthread_t threads[THREAD_COUNT];

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

@@ -105,7 +105,7 @@ static void do_test(void)
 		close(listen_fd);
 }
 
-void test_sk_storage_tracing(void)
+void serial_test_sk_storage_tracing(void)
 {
 	struct test_sk_storage_trace_itself *skel_itself;
 	int err;

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

@@ -6,7 +6,7 @@
 /* Demonstrate that bpf_snprintf_btf succeeds and that various data types
  * are formatted correctly.
  */
-void test_snprintf_btf(void)
+void serial_test_snprintf_btf(void)
 {
 	struct netif_receive_skb *skel;
 	struct netif_receive_skb__bss *bss;

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

@@ -329,7 +329,7 @@ static void test(void)
 		close(listen_fd);
 }
 
-void test_sock_fields(void)
+void serial_test_sock_fields(void)
 {
 	struct bpf_link *egress_link = NULL, *ingress_link = NULL;
 	int parent_cg_fd = -1, child_cg_fd = -1;

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

@@ -2037,7 +2037,7 @@ static void run_tests(struct test_sockmap_listen *skel, struct bpf_map *map,
 	test_udp_unix_redir(skel, map, family);
 }
 
-void test_sockmap_listen(void)
+void serial_test_sockmap_listen(void)
 {
 	struct test_sockmap_listen *skel;
 

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

@@ -39,7 +39,8 @@ static int timer(struct timer *timer_skel)
 	return 0;
 }
 
-void test_timer(void)
+/* TODO: use pid filtering */
+void serial_test_timer(void)
 {
 	struct timer *timer_skel = NULL;
 	int err;

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

@@ -52,7 +52,7 @@ static int timer_mim(struct timer_mim *timer_skel)
 	return 0;
 }
 
-void test_timer_mim(void)
+void serial_test_timer_mim(void)
 {
 	struct timer_mim_reject *timer_reject_skel = NULL;
 	libbpf_print_fn_t old_print_fn = NULL;

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

 // SPDX-License-Identifier: GPL-2.0
 #include <test_progs.h>
 
-void test_tp_attach_query(void)
+void serial_test_tp_attach_query(void)
 {
 	const int num_progs = 3;
 	int i, j, bytes, efd, err, prog_fd[num_progs], pmu_fd[num_progs];

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

@@ -8,7 +8,7 @@
 #define TRACEBUF	"/sys/kernel/debug/tracing/trace_pipe"
 #define SEARCHMSG	"testing,testing"
 
-void test_trace_printk(void)
+void serial_test_trace_printk(void)
 {
 	int err = 0, iter = 0, found = 0;
 	struct trace_printk__bss *bss;

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

@@ -8,7 +8,7 @@
 #define TRACEBUF	"/sys/kernel/debug/tracing/trace_pipe"
 #define SEARCHMSG	"1,2,3,4,5,6,7,8,9,10"
 
-void test_trace_vprintk(void)
+void serial_test_trace_vprintk(void)
 {
 	int err = 0, iter = 0, found = 0;
 	struct trace_vprintk__bss *bss;

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

@@ -41,7 +41,8 @@ static struct bpf_link *load(struct bpf_object *obj, const char *name)
 	return bpf_program__attach_trace(prog);
 }
 
-void test_trampoline_count(void)
+/* TODO: use different target function to run in concurrent mode */
+void serial_test_trampoline_count(void)
 {
 	const char *fentry_name = "fentry/__set_task_comm";
 	const char *fexit_name = "fexit/__set_task_comm";

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

@@ -4,7 +4,7 @@
 #define IFINDEX_LO 1
 #define XDP_FLAGS_REPLACE		(1U << 4)
 
-void test_xdp_attach(void)
+void serial_test_xdp_attach(void)
 {
 	__u32 duration = 0, id1, id2, id0 = 0, len;
 	struct bpf_object *obj1, *obj2, *obj3;

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

@@ -519,7 +519,7 @@ static struct bond_test_case bond_test_cases[] = {
 	{ "xdp_bonding_xor_layer34", BOND_MODE_XOR, BOND_XMIT_POLICY_LAYER34, },
 };
 
-void test_xdp_bonding(void)
+void serial_test_xdp_bonding(void)
 {
 	libbpf_print_fn_t old_print_fn;
 	struct skeletons skeletons = {};

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

@@ -7,7 +7,7 @@
 
 #define IFINDEX_LO	1
 
-void test_xdp_cpumap_attach(void)
+void serial_test_xdp_cpumap_attach(void)
 {
 	struct test_xdp_with_cpumap_helpers *skel;
 	struct bpf_prog_info info = {};

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

@@ -72,7 +72,7 @@ void test_neg_xdp_devmap_helpers(void)
 }
 
 
-void test_xdp_devmap_attach(void)
+void serial_test_xdp_devmap_attach(void)
 {
 	if (test__start_subtest("DEVMAP with programs in entries"))
 		test_xdp_with_devmap_helpers();

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

@@ -4,7 +4,7 @@
 
 #define IFINDEX_LO 1
 
-void test_xdp_info(void)
+void serial_test_xdp_info(void)
 {
 	__u32 len = sizeof(struct bpf_prog_info), duration = 0, prog_id;
 	const char *file = "./xdp_dummy.o";

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

@@ -6,7 +6,7 @@
 
 #define IFINDEX_LO 1
 
-void test_xdp_link(void)
+void serial_test_xdp_link(void)
 {
 	__u32 duration = 0, id1, id2, id0 = 0, prog_fd1, prog_fd2, err;
 	DECLARE_LIBBPF_OPTS(bpf_xdp_set_link_opts, opts, .old_fd = -1);