1 // SPDX-License-Identifier: GPL-2.0
2 #include <kunit/test.h>
3
4 #include "protocol.h"
5
6 static struct mptcp_subflow_request_sock *build_req_sock(struct kunit *test)
7 {
8 struct mptcp_subflow_request_sock *req;
9
10 req = kunit_kzalloc(test, sizeof(struct mptcp_subflow_request_sock),
11 GFP_USER);
12 KUNIT_EXPECT_NOT_ERR_OR_NULL(test, req);
13 mptcp_token_init_request((struct request_sock *)req);
14 sock_net_set((struct sock *)req, &init_net);
15 return req;
16 }
17
18 static void mptcp_token_test_req_basic(struct kunit *test)
19 {
20 struct mptcp_subflow_request_sock *req = build_req_sock(test);
21 struct mptcp_sock *null_msk = NULL;
22
23 KUNIT_ASSERT_EQ(test, 0,
24 mptcp_token_new_request((struct request_sock *)req));
25 KUNIT_EXPECT_NE(test, 0, (int)req->token);
26 KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(&init_net, req->token));
27
28 /* cleanup */
29 mptcp_token_destroy_request((struct request_sock *)req);
30 }
31
32 static struct inet_connection_sock *build_icsk(struct kunit *test)
33 {
34 struct inet_connection_sock *icsk;
35
36 icsk = kunit_kzalloc(test, sizeof(struct inet_connection_sock),
37 GFP_USER);
38 KUNIT_EXPECT_NOT_ERR_OR_NULL(test, icsk);
39 return icsk;
40 }
41
42 static struct mptcp_subflow_context *build_ctx(struct kunit *test)
43 {
44 struct mptcp_subflow_context *ctx;
45
46 ctx = kunit_kzalloc(test, sizeof(struct mptcp_subflow_context),
47 GFP_USER);
48 KUNIT_EXPECT_NOT_ERR_OR_NULL(test, ctx);
49 return ctx;
50 }
51
52 static struct mptcp_sock *build_msk(struct kunit *test)
53 {
54 struct mptcp_sock *msk;
55 struct sock *sk;
56
57 msk = kunit_kzalloc(test, sizeof(struct mptcp_sock), GFP_USER);
58 KUNIT_EXPECT_NOT_ERR_OR_NULL(test, msk);
59 refcount_set(&((struct sock *)msk)->sk_refcnt, 1);
60 sock_net_set((struct sock *)msk, &init_net);
61
62 sk = (struct sock *)msk;
63
64 /* be sure the token helpers can dereference sk->sk_prot */
65 sk->sk_prot = &tcp_prot;
66 sk->sk_protocol = IPPROTO_MPTCP;
67
68 return msk;
69 }
70
71 static void mptcp_token_test_msk_basic(struct kunit *test)
72 {
73 struct inet_connection_sock *icsk = build_icsk(test);
74 struct mptcp_subflow_context *ctx = build_ctx(test);
75 struct mptcp_sock *msk = build_msk(test);
76 struct mptcp_sock *null_msk = NULL;
77 struct sock *sk;
78
79 rcu_assign_pointer(icsk->icsk_ulp_data, ctx);
80 ctx->conn = (struct sock *)msk;
81 sk = (struct sock *)msk;
82
83 KUNIT_ASSERT_EQ(test, 0,
84 mptcp_token_new_connect((struct sock *)icsk));
85 KUNIT_EXPECT_NE(test, 0, (int)ctx->token);
86 KUNIT_EXPECT_EQ(test, ctx->token, msk->token);
87 KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(&init_net, ctx->token));
88 KUNIT_EXPECT_EQ(test, 2, (int)refcount_read(&sk->sk_refcnt));
89
90 mptcp_token_destroy(msk);
91 KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(&init_net, ctx->token));
92 }
93
94 static void mptcp_token_test_accept(struct kunit *test)
95 {
96 struct mptcp_subflow_request_sock *req = build_req_sock(test);
97 struct mptcp_sock *msk = build_msk(test);
98
99 KUNIT_ASSERT_EQ(test, 0,
100 mptcp_token_new_request((struct request_sock *)req));
101 msk->token = req->token;
102 mptcp_token_accept(req, msk);
103 KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(&init_net, msk->token));
104
105 /* this is now a no-op */
106 mptcp_token_destroy_request((struct request_sock *)req);
107 KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(&init_net, msk->token));
108
109 /* cleanup */
110 mptcp_token_destroy(msk);
111 }
112
113 static void mptcp_token_test_destroyed(struct kunit *test)
114 {
115 struct mptcp_subflow_request_sock *req = build_req_sock(test);
116 struct mptcp_sock *msk = build_msk(test);
117 struct mptcp_sock *null_msk = NULL;
118 struct sock *sk;
119
120 sk = (struct sock *)msk;
121
122 KUNIT_ASSERT_EQ(test, 0,
123 mptcp_token_new_request((struct request_sock *)req));
124 msk->token = req->token;
125 mptcp_token_accept(req, msk);
126
127 /* simulate race on removal */
128 refcount_set(&sk->sk_refcnt, 0);
129 KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(&init_net, msk->token));
130
131 /* cleanup */
132 mptcp_token_destroy(msk);
133 }
134
135 static struct kunit_case mptcp_token_test_cases[] = {
136 KUNIT_CASE(mptcp_token_test_req_basic),
137 KUNIT_CASE(mptcp_token_test_msk_basic),
138 KUNIT_CASE(mptcp_token_test_accept),
139 KUNIT_CASE(mptcp_token_test_destroyed),
140 {}
141 };
142
143 static struct kunit_suite mptcp_token_suite = {
144 .name = "mptcp-token",
145 .test_cases = mptcp_token_test_cases,
146 };
147
148 kunit_test_suite(mptcp_token_suite);
149
150 MODULE_LICENSE("GPL");
151 MODULE_DESCRIPTION("KUnit tests for MPTCP Token");
152
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