xref: /openbmc/linux/net/mptcp/token_test.c (revision ade4d754)
1 // SPDX-License-Identifier: GPL-2.0
2 #include <kunit/test.h>
3 
4 #include "protocol.h"
5 
build_req_sock(struct kunit * test)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 
mptcp_token_test_req_basic(struct kunit * test)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 
build_icsk(struct kunit * test)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 
build_ctx(struct kunit * test)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 
build_msk(struct kunit * test)52 static struct mptcp_sock *build_msk(struct kunit *test)
53 {
54 	struct mptcp_sock *msk;
55 
56 	msk = kunit_kzalloc(test, sizeof(struct mptcp_sock), GFP_USER);
57 	KUNIT_EXPECT_NOT_ERR_OR_NULL(test, msk);
58 	refcount_set(&((struct sock *)msk)->sk_refcnt, 1);
59 	sock_net_set((struct sock *)msk, &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 
mptcp_token_test_msk_basic(struct kunit * test)66 static 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 
mptcp_token_test_accept(struct kunit * test)89 static 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(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((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 
mptcp_token_test_destroyed(struct kunit * test)108 static 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(req, msk);
121 
122 	/* simulate race on removal */
123 	refcount_set(&sk->sk_refcnt, 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 
130 static 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 
138 static struct kunit_suite mptcp_token_suite = {
139 	.name = "mptcp-token",
140 	.test_cases = mptcp_token_test_cases,
141 };
142 
143 kunit_test_suite(mptcp_token_suite);
144 
145 MODULE_LICENSE("GPL");
146