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

source code of linux/net/mptcp/token_test.c