Revert "selftests/bpf: Temporarily disable linked list tests"

This reverts commit 0a2f85a1.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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

@@ -24,9 +24,7 @@ static struct {
 	{ #test "_missing_lock_pop_back", \
 	  "bpf_spin_lock at off=" #off " must be held for bpf_list_head" },
 	TEST(kptr, 32)
-/* FIXME
 	TEST(global, 16)
-*/
 	TEST(map, 0)
 	TEST(inner_map, 0)
 #undef TEST
@@ -34,6 +32,9 @@ static struct {
 	{ #test "_kptr_incorrect_lock_" #op, \
 	  "held lock and object are not in the same allocation\n" \
 	  "bpf_spin_lock at off=32 must be held for bpf_list_head" }, \
+	{ #test "_global_incorrect_lock_" #op, \
+	  "held lock and object are not in the same allocation\n" \
+	  "bpf_spin_lock at off=16 must be held for bpf_list_head" }, \
 	{ #test "_map_incorrect_lock_" #op, \
 	  "held lock and object are not in the same allocation\n" \
 	  "bpf_spin_lock at off=0 must be held for bpf_list_head" }, \
@@ -44,6 +45,10 @@ static struct {
 	TEST(kptr, push_back)
 	TEST(kptr, pop_front)
 	TEST(kptr, pop_back)
+	TEST(global, push_front)
+	TEST(global, push_back)
+	TEST(global, pop_front)
+	TEST(global, pop_back)
 	TEST(map, push_front)
 	TEST(map, push_back)
 	TEST(map, pop_front)
@@ -53,14 +58,12 @@ static struct {
 	TEST(inner_map, pop_front)
 	TEST(inner_map, pop_back)
 #undef TEST
-/* FIXME
 	{ "map_compat_kprobe", "tracing progs cannot use bpf_list_head yet" },
 	{ "map_compat_kretprobe", "tracing progs cannot use bpf_list_head yet" },
 	{ "map_compat_tp", "tracing progs cannot use bpf_list_head yet" },
 	{ "map_compat_perf", "tracing progs cannot use bpf_list_head yet" },
 	{ "map_compat_raw_tp", "tracing progs cannot use bpf_list_head yet" },
 	{ "map_compat_raw_tp_w", "tracing progs cannot use bpf_list_head yet" },
-*/
 	{ "obj_type_id_oor", "local type ID argument must be in range [0, U32_MAX]" },
 	{ "obj_new_no_composite", "bpf_obj_new type ID argument must be of a struct" },
 	{ "obj_new_no_struct", "bpf_obj_new type ID argument must be of a struct" },
@@ -75,7 +78,6 @@ static struct {
 	{ "direct_write_head", "direct access to bpf_list_head is disallowed" },
 	{ "direct_read_node", "direct access to bpf_list_node is disallowed" },
 	{ "direct_write_node", "direct access to bpf_list_node is disallowed" },
-/* FIXME
 	{ "write_after_push_front", "only read is supported" },
 	{ "write_after_push_back", "only read is supported" },
 	{ "use_after_unlock_push_front", "invalid mem access 'scalar'" },
@@ -92,11 +94,8 @@ static struct {
 	{ "no_head_type", "bpf_list_head not found at offset=0" },
 	{ "incorrect_head_var_off1", "R1 doesn't have constant offset" },
 	{ "incorrect_head_var_off2", "variable ptr_ access var_off=(0x0; 0xffffffff) disallowed" },
-*/
 	{ "incorrect_head_off1", "bpf_list_head not found at offset=17" },
-/* FIXME
 	{ "incorrect_head_off2", "bpf_list_head not found at offset=1" },
-*/
 	{ "pop_front_off",
 	  "15: (bf) r1 = r6                      ; R1_w=ptr_or_null_foo(id=4,ref_obj_id=4,off=40,imm=0) "
 	  "R6_w=ptr_or_null_foo(id=4,ref_obj_id=4,off=40,imm=0) refs=2,4\n"
@@ -189,10 +188,8 @@ static void test_linked_list_success(int mode, bool leave_in_map)
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_push_pop), &opts);
 	ASSERT_OK(ret, "global_list_push_pop");
 	ASSERT_OK(opts.retval, "global_list_push_pop retval");
-	/* FIXME:
 	if (!leave_in_map)
 		clear_fields(skel->maps.data_A);
-	*/
 
 	if (mode == PUSH_POP)
 		goto end;
@@ -213,10 +210,8 @@ static void test_linked_list_success(int mode, bool leave_in_map)
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_push_pop_multiple), &opts);
 	ASSERT_OK(ret, "global_list_push_pop_multiple");
 	ASSERT_OK(opts.retval, "global_list_push_pop_multiple retval");
-	/* FIXME:
 	if (!leave_in_map)
 		clear_fields(skel->maps.data_A);
-	*/
 
 	if (mode == PUSH_POP_MULT)
 		goto end;
@@ -237,10 +232,8 @@ static void test_linked_list_success(int mode, bool leave_in_map)
 	ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.global_list_in_list), &opts);
 	ASSERT_OK(ret, "global_list_in_list");
 	ASSERT_OK(opts.retval, "global_list_in_list retval");
-	/* FIXME:
 	if (!leave_in_map)
 		clear_fields(skel->maps.data_A);
-	*/
 end:
 	linked_list__destroy(skel);
 }

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

@@ -291,10 +291,7 @@ int inner_map_list_push_pop(void *ctx)
 SEC("tc")
 int global_list_push_pop(void *ctx)
 {
-	/* FIXME:
-	 * return test_list_push_pop(&glock, &ghead);
-	 */
-	return 0;
+	return test_list_push_pop(&glock, &ghead);
 }
 
 SEC("tc")
@@ -330,13 +327,10 @@ int global_list_push_pop_multiple(void *ctx)
 {
 	int ret;
 
-	/* FIXME:
 	ret = list_push_pop_multiple(&glock, &ghead, false);
 	if (ret)
 		return ret;
 	return list_push_pop_multiple(&glock, &ghead, true);
-	*/
-	return 0;
 }
 
 SEC("tc")
@@ -370,10 +364,7 @@ int inner_map_list_in_list(void *ctx)
 SEC("tc")
 int global_list_in_list(void *ctx)
 {
-	/* FIXME
 	return test_list_in_list(&glock, &ghead);
-	*/
-	return 0;
 }
 
 char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/linked_list.h

@@ -47,12 +47,10 @@ struct {
 	},
 };
 
-/* FIXME
 #define private(name) SEC(".data." #name) __hidden __attribute__((aligned(8)))
 
 private(A) struct bpf_spin_lock glock;
 private(A) struct bpf_list_head ghead __contains(foo, node);
 private(B) struct bpf_spin_lock glock2;
 
-*/
 #endif

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

@@ -59,12 +59,10 @@ CHECK(kptr, push_back, &f->head);
 CHECK(kptr, pop_front, &f->head);
 CHECK(kptr, pop_back, &f->head);
 
-/* FIXME
 CHECK(global, push_front, &ghead);
 CHECK(global, push_back, &ghead);
 CHECK(global, pop_front, &ghead);
 CHECK(global, pop_back, &ghead);
-*/
 
 CHECK(map, push_front, &v->head);
 CHECK(map, push_back, &v->head);
@@ -91,15 +89,23 @@ CHECK(inner_map, pop_back, &iv->head);
 
 #define CHECK_OP(op)                                           \
 	CHECK(kptr_kptr, op, &f1->lock, &f2->head);            \
+	CHECK(kptr_global, op, &f1->lock, &ghead);             \
 	CHECK(kptr_map, op, &f1->lock, &v->head);              \
 	CHECK(kptr_inner_map, op, &f1->lock, &iv->head);       \
                                                                \
+	CHECK(global_global, op, &glock2, &ghead);             \
+	CHECK(global_kptr, op, &glock, &f1->head);             \
+	CHECK(global_map, op, &glock, &v->head);               \
+	CHECK(global_inner_map, op, &glock, &iv->head);        \
+                                                               \
 	CHECK(map_map, op, &v->lock, &v2->head);               \
 	CHECK(map_kptr, op, &v->lock, &f2->head);              \
+	CHECK(map_global, op, &v->lock, &ghead);               \
 	CHECK(map_inner_map, op, &v->lock, &iv->head);         \
                                                                \
 	CHECK(inner_map_inner_map, op, &iv->lock, &iv2->head); \
 	CHECK(inner_map_kptr, op, &iv->lock, &f2->head);       \
+	CHECK(inner_map_global, op, &iv->lock, &ghead);        \
 	CHECK(inner_map_map, op, &iv->lock, &v->head);
 
 CHECK_OP(push_front);
@@ -111,7 +117,6 @@ CHECK_OP(pop_back);
 #undef CHECK_OP
 #undef INIT
 
-/* FIXME
 SEC("?kprobe/xyz")
 int map_compat_kprobe(void *ctx)
 {
@@ -153,7 +158,6 @@ int map_compat_raw_tp_w(void *ctx)
 	bpf_list_push_front(&ghead, NULL);
 	return 0;
 }
-*/
 
 SEC("?tc")
 int obj_type_id_oor(void *ctx)
@@ -299,7 +303,6 @@ int direct_write_node(void *ctx)
 	return 0;
 }
 
-/* FIXME
 static __always_inline
 int write_after_op(void (*push_op)(void *head, void *node))
 {
@@ -503,7 +506,6 @@ int incorrect_head_var_off2(struct __sk_buff *ctx)
 
 	return 0;
 }
-*/
 
 SEC("?tc")
 int incorrect_head_off1(void *ctx)
@@ -527,7 +529,6 @@ int incorrect_head_off1(void *ctx)
 	return 0;
 }
 
-/* FIXME
 SEC("?tc")
 int incorrect_head_off2(void *ctx)
 {
@@ -544,7 +545,6 @@ int incorrect_head_off2(void *ctx)
 
 	return 0;
 }
-*/
 
 static __always_inline
 int pop_ptr_off(void *(*op)(void *head))