net/mptcp/token_test.c

   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         return req;
  15 }
  16
  17 static void mptcp_token_test_req_basic(struct kunit *test)
  18 {
  19         struct mptcp_subflow_request_sock *req = build_req_sock(test);
  20         struct mptcp_sock *null_msk = NULL;
  21
  22         KUNIT_ASSERT_EQ(test, 0,
  23                         mptcp_token_new_request((struct request_sock *)req));
  24         KUNIT_EXPECT_NE(test, 0, (int)req->token);
  25         KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(req->token));
  26
  27         /* cleanup */
  28         mptcp_token_destroy_request((struct request_sock *)req);
  29 }
  30
  31 static struct inet_connection_sock *build_icsk(struct kunit *test)
  32 {
  33         struct inet_connection_sock *icsk;
  34
  35         icsk = kunit_kzalloc(test, sizeof(struct inet_connection_sock),
  36                              GFP_USER);
  37         KUNIT_EXPECT_NOT_ERR_OR_NULL(test, icsk);
  38         return icsk;
  39 }
  40
  41 static struct mptcp_subflow_context *build_ctx(struct kunit *test)
  42 {
  43         struct mptcp_subflow_context *ctx;
  44
  45         ctx = kunit_kzalloc(test, sizeof(struct mptcp_subflow_context),
  46                             GFP_USER);
  47         KUNIT_EXPECT_NOT_ERR_OR_NULL(test, ctx);
  48         return ctx;
  49 }
  50
  51 static struct mptcp_sock *build_msk(struct kunit *test)
  52 {
  53         struct mptcp_sock *msk;
  54
  55         msk = kunit_kzalloc(test, sizeof(struct mptcp_sock), GFP_USER);
  56         KUNIT_EXPECT_NOT_ERR_OR_NULL(test, msk);
  57         refcount_set(&((struct sock *)msk)->sk_refcnt, 1);
  58         return msk;
  59 }
  60
  61 static void mptcp_token_test_msk_basic(struct kunit *test)
  62 {
  63         struct inet_connection_sock *icsk = build_icsk(test);
  64         struct mptcp_subflow_context *ctx = build_ctx(test);
  65         struct mptcp_sock *msk = build_msk(test);
  66         struct mptcp_sock *null_msk = NULL;
  67         struct sock *sk;
  68
  69         rcu_assign_pointer(icsk->icsk_ulp_data, ctx);
  70         ctx->conn = (struct sock *)msk;
  71         sk = (struct sock *)msk;
  72
  73         KUNIT_ASSERT_EQ(test, 0,
  74                         mptcp_token_new_connect((struct sock *)icsk));
  75         KUNIT_EXPECT_NE(test, 0, (int)ctx->token);
  76         KUNIT_EXPECT_EQ(test, ctx->token, msk->token);
  77         KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(ctx->token));
  78         KUNIT_EXPECT_EQ(test, 2, (int)refcount_read(&sk->sk_refcnt));
  79
  80         mptcp_token_destroy(msk);
  81         KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(ctx->token));
  82 }
  83
  84 static void mptcp_token_test_accept(struct kunit *test)
  85 {
  86         struct mptcp_subflow_request_sock *req = build_req_sock(test);
  87         struct mptcp_sock *msk = build_msk(test);
  88
  89         KUNIT_ASSERT_EQ(test, 0,
  90                         mptcp_token_new_request((struct request_sock *)req));
  91         msk->token = req->token;
  92         mptcp_token_accept(req, msk);
  93         KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(msk->token));
  94
  95         /* this is now a no-op */
  96         mptcp_token_destroy_request((struct request_sock *)req);
  97         KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(msk->token));
  98
  99         /* cleanup */
 100         mptcp_token_destroy(msk);
 101 }
 102
 103 static void mptcp_token_test_destroyed(struct kunit *test)
 104 {
 105         struct mptcp_subflow_request_sock *req = build_req_sock(test);
 106         struct mptcp_sock *msk = build_msk(test);
 107         struct mptcp_sock *null_msk = NULL;
 108         struct sock *sk;
 109
 110         sk = (struct sock *)msk;
 111
 112         KUNIT_ASSERT_EQ(test, 0,
 113                         mptcp_token_new_request((struct request_sock *)req));
 114         msk->token = req->token;
 115         mptcp_token_accept(req, msk);
 116
 117         /* simulate race on removal */
 118         refcount_set(&sk->sk_refcnt, 0);
 119         KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(msk->token));
 120
 121         /* cleanup */
 122         mptcp_token_destroy(msk);
 123 }
 124
 125 static struct kunit_case mptcp_token_test_cases[] = {
 126         KUNIT_CASE(mptcp_token_test_req_basic),
 127         KUNIT_CASE(mptcp_token_test_msk_basic),
 128         KUNIT_CASE(mptcp_token_test_accept),
 129         KUNIT_CASE(mptcp_token_test_destroyed),
 130         {}
 131 };
 132
 133 static struct kunit_suite mptcp_token_suite = {
 134         .name = "mptcp-token",
 135         .test_cases = mptcp_token_test_cases,
 136 };
 137
 138 kunit_test_suite(mptcp_token_suite);
 139
 140 MODULE_LICENSE("GPL");