LXR linux/net/mptcp/token

   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        return req;
  15}
  16
  17static 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
  31static 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
  41static 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
  51static 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
  61static 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
  84static 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
 103static 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
 125static 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
 133static struct kunit_suite mptcp_token_suite = {
 134        .name = "mptcp-token",
 135        .test_cases = mptcp_token_test_cases,
 136};
 137
 138kunit_test_suite(mptcp_token_suite);
 139
 140MODULE_LICENSE("GPL");
 141