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 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 return msk; 61 } 62 63 static void mptcp_token_test_msk_basic(struct kunit *test) 64 { 65 struct inet_connection_sock *icsk = build_icsk(test); 66 struct mptcp_subflow_context *ctx = build_ctx(test); 67 struct mptcp_sock *msk = build_msk(test); 68 struct mptcp_sock *null_msk = NULL; 69 struct sock *sk; 70 71 rcu_assign_pointer(icsk->icsk_ulp_data, ctx); 72 ctx->conn = (struct sock *)msk; 73 sk = (struct sock *)msk; 74 75 KUNIT_ASSERT_EQ(test, 0, 76 mptcp_token_new_connect((struct sock *)icsk)); 77 KUNIT_EXPECT_NE(test, 0, (int)ctx->token); 78 KUNIT_EXPECT_EQ(test, ctx->token, msk->token); 79 KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(&init_net, ctx->token)); 80 KUNIT_EXPECT_EQ(test, 2, (int)refcount_read(&sk->sk_refcnt)); 81 82 mptcp_token_destroy(msk); 83 KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(&init_net, ctx->token)); 84 } 85 86 static void mptcp_token_test_accept(struct kunit *test) 87 { 88 struct mptcp_subflow_request_sock *req = build_req_sock(test); 89 struct mptcp_sock *msk = build_msk(test); 90 91 KUNIT_ASSERT_EQ(test, 0, 92 mptcp_token_new_request((struct request_sock *)req)); 93 msk->token = req->token; 94 mptcp_token_accept(req, msk); 95 KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(&init_net, msk->token)); 96 97 /* this is now a no-op */ 98 mptcp_token_destroy_request((struct request_sock *)req); 99 KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(&init_net, msk->token)); 100 101 /* cleanup */ 102 mptcp_token_destroy(msk); 103 } 104 105 static void mptcp_token_test_destroyed(struct kunit *test) 106 { 107 struct mptcp_subflow_request_sock *req = build_req_sock(test); 108 struct mptcp_sock *msk = build_msk(test); 109 struct mptcp_sock *null_msk = NULL; 110 struct sock *sk; 111 112 sk = (struct sock *)msk; 113 114 KUNIT_ASSERT_EQ(test, 0, 115 mptcp_token_new_request((struct request_sock *)req)); 116 msk->token = req->token; 117 mptcp_token_accept(req, msk); 118 119 /* simulate race on removal */ 120 refcount_set(&sk->sk_refcnt, 0); 121 KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(&init_net, msk->token)); 122 123 /* cleanup */ 124 mptcp_token_destroy(msk); 125 } 126 127 static struct kunit_case mptcp_token_test_cases[] = { 128 KUNIT_CASE(mptcp_token_test_req_basic), 129 KUNIT_CASE(mptcp_token_test_msk_basic), 130 KUNIT_CASE(mptcp_token_test_accept), 131 KUNIT_CASE(mptcp_token_test_destroyed), 132 {} 133 }; 134 135 static struct kunit_suite mptcp_token_suite = { 136 .name = "mptcp-token", 137 .test_cases = mptcp_token_test_cases, 138 }; 139 140 kunit_test_suite(mptcp_token_suite); 141 142 MODULE_LICENSE("GPL"); 143