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