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, 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 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((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, 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, 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, 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 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(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 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(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 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