1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2023 Oracle and/or its affiliates.
5 * KUnit test of the handshake upcall mechanism.
8 #include <kunit/test.h>
9 #include <kunit/visibility.h>
11 #include <linux/kernel.h>
14 #include <net/genetlink.h>
15 #include <net/netns/generic.h>
17 #include <uapi/linux/handshake.h>
18 #include "handshake.h"
20 MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");
22 static int test_accept_func(struct handshake_req *req, struct genl_info *info,
28 static void test_done_func(struct handshake_req *req, unsigned int status,
29 struct genl_info *info)
33 struct handshake_req_alloc_test_param {
35 struct handshake_proto *proto;
40 static struct handshake_proto handshake_req_alloc_proto_2 = {
41 .hp_handler_class = HANDSHAKE_HANDLER_CLASS_NONE,
44 static struct handshake_proto handshake_req_alloc_proto_3 = {
45 .hp_handler_class = HANDSHAKE_HANDLER_CLASS_MAX,
48 static struct handshake_proto handshake_req_alloc_proto_4 = {
49 .hp_handler_class = HANDSHAKE_HANDLER_CLASS_TLSHD,
52 static struct handshake_proto handshake_req_alloc_proto_5 = {
53 .hp_handler_class = HANDSHAKE_HANDLER_CLASS_TLSHD,
54 .hp_accept = test_accept_func,
57 static struct handshake_proto handshake_req_alloc_proto_6 = {
58 .hp_handler_class = HANDSHAKE_HANDLER_CLASS_TLSHD,
59 .hp_privsize = UINT_MAX,
60 .hp_accept = test_accept_func,
61 .hp_done = test_done_func,
64 static struct handshake_proto handshake_req_alloc_proto_good = {
65 .hp_handler_class = HANDSHAKE_HANDLER_CLASS_TLSHD,
66 .hp_accept = test_accept_func,
67 .hp_done = test_done_func,
71 struct handshake_req_alloc_test_param handshake_req_alloc_params[] = {
73 .desc = "handshake_req_alloc NULL proto",
76 .expect_success = false,
79 .desc = "handshake_req_alloc CLASS_NONE",
80 .proto = &handshake_req_alloc_proto_2,
82 .expect_success = false,
85 .desc = "handshake_req_alloc CLASS_MAX",
86 .proto = &handshake_req_alloc_proto_3,
88 .expect_success = false,
91 .desc = "handshake_req_alloc no callbacks",
92 .proto = &handshake_req_alloc_proto_4,
94 .expect_success = false,
97 .desc = "handshake_req_alloc no done callback",
98 .proto = &handshake_req_alloc_proto_5,
100 .expect_success = false,
103 .desc = "handshake_req_alloc excessive privsize",
104 .proto = &handshake_req_alloc_proto_6,
105 .gfp = GFP_KERNEL | __GFP_NOWARN,
106 .expect_success = false,
109 .desc = "handshake_req_alloc all good",
110 .proto = &handshake_req_alloc_proto_good,
112 .expect_success = true,
117 handshake_req_alloc_get_desc(const struct handshake_req_alloc_test_param *param,
120 strscpy(desc, param->desc, KUNIT_PARAM_DESC_SIZE);
123 /* Creates the function handshake_req_alloc_gen_params */
124 KUNIT_ARRAY_PARAM(handshake_req_alloc, handshake_req_alloc_params,
125 handshake_req_alloc_get_desc);
127 static void handshake_req_alloc_case(struct kunit *test)
129 const struct handshake_req_alloc_test_param *param = test->param_value;
130 struct handshake_req *result;
135 result = handshake_req_alloc(param->proto, param->gfp);
138 if (param->expect_success)
139 KUNIT_EXPECT_NOT_NULL(test, result);
141 KUNIT_EXPECT_NULL(test, result);
146 static void handshake_req_submit_test1(struct kunit *test)
152 err = __sock_create(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP,
154 KUNIT_ASSERT_EQ(test, err, 0);
157 result = handshake_req_submit(sock, NULL, GFP_KERNEL);
160 KUNIT_EXPECT_EQ(test, result, -EINVAL);
165 static void handshake_req_submit_test2(struct kunit *test)
167 struct handshake_req *req;
171 req = handshake_req_alloc(&handshake_req_alloc_proto_good, GFP_KERNEL);
172 KUNIT_ASSERT_NOT_NULL(test, req);
175 result = handshake_req_submit(NULL, req, GFP_KERNEL);
178 KUNIT_EXPECT_EQ(test, result, -EINVAL);
180 /* handshake_req_submit() destroys @req on error */
183 static void handshake_req_submit_test3(struct kunit *test)
185 struct handshake_req *req;
190 req = handshake_req_alloc(&handshake_req_alloc_proto_good, GFP_KERNEL);
191 KUNIT_ASSERT_NOT_NULL(test, req);
193 err = __sock_create(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP,
195 KUNIT_ASSERT_EQ(test, err, 0);
199 result = handshake_req_submit(sock, req, GFP_KERNEL);
202 KUNIT_EXPECT_EQ(test, result, -EINVAL);
204 /* handshake_req_submit() destroys @req on error */
208 static void handshake_req_submit_test4(struct kunit *test)
210 struct handshake_req *req, *result;
216 req = handshake_req_alloc(&handshake_req_alloc_proto_good, GFP_KERNEL);
217 KUNIT_ASSERT_NOT_NULL(test, req);
219 err = __sock_create(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP,
221 KUNIT_ASSERT_EQ(test, err, 0);
222 filp = sock_alloc_file(sock, O_NONBLOCK, NULL);
223 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filp);
224 KUNIT_ASSERT_NOT_NULL(test, sock->sk);
227 err = handshake_req_submit(sock, req, GFP_KERNEL);
228 KUNIT_ASSERT_EQ(test, err, 0);
231 result = handshake_req_hash_lookup(sock->sk);
234 KUNIT_EXPECT_NOT_NULL(test, result);
235 KUNIT_EXPECT_PTR_EQ(test, req, result);
237 handshake_req_cancel(sock->sk);
241 static void handshake_req_submit_test5(struct kunit *test)
243 struct handshake_req *req;
244 struct handshake_net *hn;
251 req = handshake_req_alloc(&handshake_req_alloc_proto_good, GFP_KERNEL);
252 KUNIT_ASSERT_NOT_NULL(test, req);
254 err = __sock_create(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP,
256 KUNIT_ASSERT_EQ(test, err, 0);
257 filp = sock_alloc_file(sock, O_NONBLOCK, NULL);
258 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filp);
259 KUNIT_ASSERT_NOT_NULL(test, sock->sk);
262 net = sock_net(sock->sk);
263 hn = handshake_pernet(net);
264 KUNIT_ASSERT_NOT_NULL(test, hn);
266 saved = hn->hn_pending;
267 hn->hn_pending = hn->hn_pending_max + 1;
270 err = handshake_req_submit(sock, req, GFP_KERNEL);
273 KUNIT_EXPECT_EQ(test, err, -EAGAIN);
276 hn->hn_pending = saved;
279 static void handshake_req_submit_test6(struct kunit *test)
281 struct handshake_req *req1, *req2;
287 req1 = handshake_req_alloc(&handshake_req_alloc_proto_good, GFP_KERNEL);
288 KUNIT_ASSERT_NOT_NULL(test, req1);
289 req2 = handshake_req_alloc(&handshake_req_alloc_proto_good, GFP_KERNEL);
290 KUNIT_ASSERT_NOT_NULL(test, req2);
292 err = __sock_create(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP,
294 KUNIT_ASSERT_EQ(test, err, 0);
295 filp = sock_alloc_file(sock, O_NONBLOCK, NULL);
296 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filp);
297 KUNIT_ASSERT_NOT_NULL(test, sock->sk);
301 err = handshake_req_submit(sock, req1, GFP_KERNEL);
302 KUNIT_ASSERT_EQ(test, err, 0);
303 err = handshake_req_submit(sock, req2, GFP_KERNEL);
306 KUNIT_EXPECT_EQ(test, err, -EBUSY);
308 handshake_req_cancel(sock->sk);
312 static void handshake_req_cancel_test1(struct kunit *test)
314 struct handshake_req *req;
321 req = handshake_req_alloc(&handshake_req_alloc_proto_good, GFP_KERNEL);
322 KUNIT_ASSERT_NOT_NULL(test, req);
324 err = __sock_create(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP,
326 KUNIT_ASSERT_EQ(test, err, 0);
328 filp = sock_alloc_file(sock, O_NONBLOCK, NULL);
329 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filp);
332 err = handshake_req_submit(sock, req, GFP_KERNEL);
333 KUNIT_ASSERT_EQ(test, err, 0);
335 /* NB: handshake_req hasn't been accepted */
338 result = handshake_req_cancel(sock->sk);
341 KUNIT_EXPECT_TRUE(test, result);
346 static void handshake_req_cancel_test2(struct kunit *test)
348 struct handshake_req *req, *next;
349 struct handshake_net *hn;
357 req = handshake_req_alloc(&handshake_req_alloc_proto_good, GFP_KERNEL);
358 KUNIT_ASSERT_NOT_NULL(test, req);
360 err = __sock_create(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP,
362 KUNIT_ASSERT_EQ(test, err, 0);
364 filp = sock_alloc_file(sock, O_NONBLOCK, NULL);
365 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filp);
368 err = handshake_req_submit(sock, req, GFP_KERNEL);
369 KUNIT_ASSERT_EQ(test, err, 0);
371 net = sock_net(sock->sk);
372 hn = handshake_pernet(net);
373 KUNIT_ASSERT_NOT_NULL(test, hn);
375 /* Pretend to accept this request */
376 next = handshake_req_next(hn, HANDSHAKE_HANDLER_CLASS_TLSHD);
377 KUNIT_ASSERT_PTR_EQ(test, req, next);
380 result = handshake_req_cancel(sock->sk);
383 KUNIT_EXPECT_TRUE(test, result);
388 static void handshake_req_cancel_test3(struct kunit *test)
390 struct handshake_req *req, *next;
391 struct handshake_net *hn;
399 req = handshake_req_alloc(&handshake_req_alloc_proto_good, GFP_KERNEL);
400 KUNIT_ASSERT_NOT_NULL(test, req);
402 err = __sock_create(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP,
404 KUNIT_ASSERT_EQ(test, err, 0);
406 filp = sock_alloc_file(sock, O_NONBLOCK, NULL);
407 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filp);
410 err = handshake_req_submit(sock, req, GFP_KERNEL);
411 KUNIT_ASSERT_EQ(test, err, 0);
413 net = sock_net(sock->sk);
414 hn = handshake_pernet(net);
415 KUNIT_ASSERT_NOT_NULL(test, hn);
417 /* Pretend to accept this request */
418 next = handshake_req_next(hn, HANDSHAKE_HANDLER_CLASS_TLSHD);
419 KUNIT_ASSERT_PTR_EQ(test, req, next);
421 /* Pretend to complete this request */
422 handshake_complete(next, -ETIMEDOUT, NULL);
425 result = handshake_req_cancel(sock->sk);
428 KUNIT_EXPECT_FALSE(test, result);
433 static struct handshake_req *handshake_req_destroy_test;
435 static void test_destroy_func(struct handshake_req *req)
437 handshake_req_destroy_test = req;
440 static struct handshake_proto handshake_req_alloc_proto_destroy = {
441 .hp_handler_class = HANDSHAKE_HANDLER_CLASS_TLSHD,
442 .hp_accept = test_accept_func,
443 .hp_done = test_done_func,
444 .hp_destroy = test_destroy_func,
447 static void handshake_req_destroy_test1(struct kunit *test)
449 struct handshake_req *req;
455 handshake_req_destroy_test = NULL;
457 req = handshake_req_alloc(&handshake_req_alloc_proto_destroy, GFP_KERNEL);
458 KUNIT_ASSERT_NOT_NULL(test, req);
460 err = __sock_create(&init_net, PF_INET, SOCK_STREAM, IPPROTO_TCP,
462 KUNIT_ASSERT_EQ(test, err, 0);
464 filp = sock_alloc_file(sock, O_NONBLOCK, NULL);
465 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filp);
468 err = handshake_req_submit(sock, req, GFP_KERNEL);
469 KUNIT_ASSERT_EQ(test, err, 0);
471 handshake_req_cancel(sock->sk);
474 /* Ensure the close/release/put process has run to
475 * completion before checking the result.
480 KUNIT_EXPECT_PTR_EQ(test, handshake_req_destroy_test, req);
483 static struct kunit_case handshake_api_test_cases[] = {
485 .name = "req_alloc API fuzzing",
486 .run_case = handshake_req_alloc_case,
487 .generate_params = handshake_req_alloc_gen_params,
490 .name = "req_submit NULL req arg",
491 .run_case = handshake_req_submit_test1,
494 .name = "req_submit NULL sock arg",
495 .run_case = handshake_req_submit_test2,
498 .name = "req_submit NULL sock->file",
499 .run_case = handshake_req_submit_test3,
502 .name = "req_lookup works",
503 .run_case = handshake_req_submit_test4,
506 .name = "req_submit max pending",
507 .run_case = handshake_req_submit_test5,
510 .name = "req_submit multiple",
511 .run_case = handshake_req_submit_test6,
514 .name = "req_cancel before accept",
515 .run_case = handshake_req_cancel_test1,
518 .name = "req_cancel after accept",
519 .run_case = handshake_req_cancel_test2,
522 .name = "req_cancel after done",
523 .run_case = handshake_req_cancel_test3,
526 .name = "req_destroy works",
527 .run_case = handshake_req_destroy_test1,
532 static struct kunit_suite handshake_api_suite = {
533 .name = "Handshake API tests",
534 .test_cases = handshake_api_test_cases,
537 kunit_test_suites(&handshake_api_suite);
539 MODULE_DESCRIPTION("Test handshake upcall API functions");
540 MODULE_LICENSE("GPL");