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// SPDX-License-Identifier: GPL-2.0
#include <kunit/test.h>
#include "protocol.h"
static struct mptcp_subflow_request_sock *build_req_sock(struct kunit *test)
{
struct mptcp_subflow_request_sock *req;
req = kunit_kzalloc(test, sizeof(struct mptcp_subflow_request_sock),
GFP_USER);
KUNIT_EXPECT_NOT_ERR_OR_NULL(test, req);
mptcp_token_init_request((struct request_sock *)req);
sock_net_set((struct sock *)req, &init_net);
return req;
}
static void mptcp_token_test_req_basic(struct kunit *test)
{
struct mptcp_subflow_request_sock *req = build_req_sock(test);
struct mptcp_sock *null_msk = NULL;
KUNIT_ASSERT_EQ(test, 0,
mptcp_token_new_request((struct request_sock *)req));
KUNIT_EXPECT_NE(test, 0, (int)req->token);
KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(&init_net, req->token));
/* cleanup */
mptcp_token_destroy_request((struct request_sock *)req);
}
static struct inet_connection_sock *build_icsk(struct kunit *test)
{
struct inet_connection_sock *icsk;
icsk = kunit_kzalloc(test, sizeof(struct inet_connection_sock),
GFP_USER);
KUNIT_EXPECT_NOT_ERR_OR_NULL(test, icsk);
return icsk;
}
static struct mptcp_subflow_context *build_ctx(struct kunit *test)
{
struct mptcp_subflow_context *ctx;
ctx = kunit_kzalloc(test, sizeof(struct mptcp_subflow_context),
GFP_USER);
KUNIT_EXPECT_NOT_ERR_OR_NULL(test, ctx);
return ctx;
}
static struct mptcp_sock *build_msk(struct kunit *test)
{
struct mptcp_sock *msk;
msk = kunit_kzalloc(test, sizeof(struct mptcp_sock), GFP_USER);
KUNIT_EXPECT_NOT_ERR_OR_NULL(test, msk);
refcount_set(&((struct sock *)msk)->sk_refcnt, 1);
sock_net_set((struct sock *)msk, &init_net);
/* be sure the token helpers can dereference sk->sk_prot */
((struct sock *)msk)->sk_prot = &tcp_prot;
return msk;
}
static void mptcp_token_test_msk_basic(struct kunit *test)
{
struct inet_connection_sock *icsk = build_icsk(test);
struct mptcp_subflow_context *ctx = build_ctx(test);
struct mptcp_sock *msk = build_msk(test);
struct mptcp_sock *null_msk = NULL;
struct sock *sk;
rcu_assign_pointer(icsk->icsk_ulp_data, ctx);
ctx->conn = (struct sock *)msk;
sk = (struct sock *)msk;
KUNIT_ASSERT_EQ(test, 0,
mptcp_token_new_connect((struct sock *)icsk));
KUNIT_EXPECT_NE(test, 0, (int)ctx->token);
KUNIT_EXPECT_EQ(test, ctx->token, msk->token);
KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(&init_net, ctx->token));
KUNIT_EXPECT_EQ(test, 2, (int)refcount_read(&sk->sk_refcnt));
mptcp_token_destroy(msk);
KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(&init_net, ctx->token));
}
static void mptcp_token_test_accept(struct kunit *test)
{
struct mptcp_subflow_request_sock *req = build_req_sock(test);
struct mptcp_sock *msk = build_msk(test);
KUNIT_ASSERT_EQ(test, 0,
mptcp_token_new_request((struct request_sock *)req));
msk->token = req->token;
mptcp_token_accept(req, msk);
KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(&init_net, msk->token));
/* this is now a no-op */
mptcp_token_destroy_request((struct request_sock *)req);
KUNIT_EXPECT_PTR_EQ(test, msk, mptcp_token_get_sock(&init_net, msk->token));
/* cleanup */
mptcp_token_destroy(msk);
}
static void mptcp_token_test_destroyed(struct kunit *test)
{
struct mptcp_subflow_request_sock *req = build_req_sock(test);
struct mptcp_sock *msk = build_msk(test);
struct mptcp_sock *null_msk = NULL;
struct sock *sk;
sk = (struct sock *)msk;
KUNIT_ASSERT_EQ(test, 0,
mptcp_token_new_request((struct request_sock *)req));
msk->token = req->token;
mptcp_token_accept(req, msk);
/* simulate race on removal */
refcount_set(&sk->sk_refcnt, 0);
KUNIT_EXPECT_PTR_EQ(test, null_msk, mptcp_token_get_sock(&init_net, msk->token));
/* cleanup */
mptcp_token_destroy(msk);
}
static struct kunit_case mptcp_token_test_cases[] = {
KUNIT_CASE(mptcp_token_test_req_basic),
KUNIT_CASE(mptcp_token_test_msk_basic),
KUNIT_CASE(mptcp_token_test_accept),
KUNIT_CASE(mptcp_token_test_destroyed),
{}
};
static struct kunit_suite mptcp_token_suite = {
.name = "mptcp-token",
.test_cases = mptcp_token_test_cases,
};
kunit_test_suite(mptcp_token_suite);
MODULE_LICENSE("GPL");
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