From 68acca6e6f99b1f928a2c05b92bb1c272edb8ae7 Mon Sep 17 00:00:00 2001 From: Geliang Tang Date: Thu, 11 Apr 2024 13:43:11 +0800 Subject: [PATCH 1/2] selftests/bpf: Add struct send_recv_arg Avoid setting total_bytes and stop as global variables, this patch adds a new struct named send_recv_arg to pass arguments between threads. Put these two variables together with fd into this struct and pass it to server thread, so that server thread can access these two variables without setting them as global ones. Signed-off-by: Geliang Tang Link: https://lore.kernel.org/r/ca1dd703b796f6810985418373e750f7068b4186.1712813933.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau --- .../selftests/bpf/prog_tests/bpf_tcp_ca.c | 34 ++++++++++++------- 1 file changed, 22 insertions(+), 12 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c index 077b107130f6..64f172f02a9a 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c @@ -21,7 +21,6 @@ static const unsigned int total_bytes = 10 * 1024 * 1024; static int expected_stg = 0xeB9F; -static int stop; static int settcpca(int fd, const char *tcp_ca) { @@ -34,13 +33,20 @@ static int settcpca(int fd, const char *tcp_ca) return 0; } +struct send_recv_arg { + int fd; + uint32_t bytes; + int stop; +}; + static void *server(void *arg) { - int lfd = (int)(long)arg, err = 0, fd; + struct send_recv_arg *a = (struct send_recv_arg *)arg; ssize_t nr_sent = 0, bytes = 0; char batch[1500]; + int err = 0, fd; - fd = accept(lfd, NULL, NULL); + fd = accept(a->fd, NULL, NULL); while (fd == -1) { if (errno == EINTR) continue; @@ -53,9 +59,9 @@ static void *server(void *arg) goto done; } - while (bytes < total_bytes && !READ_ONCE(stop)) { + while (bytes < a->bytes && !READ_ONCE(a->stop)) { nr_sent = send(fd, &batch, - MIN(total_bytes - bytes, sizeof(batch)), 0); + MIN(a->bytes - bytes, sizeof(batch)), 0); if (nr_sent == -1 && errno == EINTR) continue; if (nr_sent == -1) { @@ -65,13 +71,13 @@ static void *server(void *arg) bytes += nr_sent; } - ASSERT_EQ(bytes, total_bytes, "send"); + ASSERT_EQ(bytes, a->bytes, "send"); done: if (fd >= 0) close(fd); if (err) { - WRITE_ONCE(stop, 1); + WRITE_ONCE(a->stop, 1); return ERR_PTR(err); } return NULL; @@ -80,18 +86,22 @@ done: static void do_test(const char *tcp_ca, const struct bpf_map *sk_stg_map) { ssize_t nr_recv = 0, bytes = 0; + struct send_recv_arg arg = { + .bytes = total_bytes, + .stop = 0, + }; int lfd = -1, fd = -1; pthread_t srv_thread; void *thread_ret; char batch[1500]; int err; - WRITE_ONCE(stop, 0); - lfd = start_server(AF_INET6, SOCK_STREAM, NULL, 0, 0); if (!ASSERT_NEQ(lfd, -1, "socket")) return; + arg.fd = lfd; + fd = socket(AF_INET6, SOCK_STREAM, 0); if (!ASSERT_NEQ(fd, -1, "socket")) { close(lfd); @@ -123,12 +133,12 @@ static void do_test(const char *tcp_ca, const struct bpf_map *sk_stg_map) goto done; } - err = pthread_create(&srv_thread, NULL, server, (void *)(long)lfd); + err = pthread_create(&srv_thread, NULL, server, (void *)&arg); if (!ASSERT_OK(err, "pthread_create")) goto done; /* recv total_bytes */ - while (bytes < total_bytes && !READ_ONCE(stop)) { + while (bytes < total_bytes && !READ_ONCE(arg.stop)) { nr_recv = recv(fd, &batch, MIN(total_bytes - bytes, sizeof(batch)), 0); if (nr_recv == -1 && errno == EINTR) @@ -140,7 +150,7 @@ static void do_test(const char *tcp_ca, const struct bpf_map *sk_stg_map) ASSERT_EQ(bytes, total_bytes, "recv"); - WRITE_ONCE(stop, 1); + WRITE_ONCE(arg.stop, 1); pthread_join(srv_thread, &thread_ret); ASSERT_OK(IS_ERR(thread_ret), "thread_ret"); From dc34e44ea6a1c11cc517adc6df527b457acb9eaf Mon Sep 17 00:00:00 2001 From: Geliang Tang Date: Thu, 11 Apr 2024 13:43:12 +0800 Subject: [PATCH 2/2] selftests/bpf: Export send_recv_data helper This patch extracts the code to send and receive data into a new helper named send_recv_data() in network_helpers.c and export it in network_helpers.h. This helper will be used for MPTCP BPF selftests. Signed-off-by: Geliang Tang Link: https://lore.kernel.org/r/5231103be91fadcce3674a589542c63b6a5eedd4.1712813933.git.tanggeliang@kylinos.cn Signed-off-by: Martin KaFai Lau --- tools/testing/selftests/bpf/network_helpers.c | 102 ++++++++++++++++++ tools/testing/selftests/bpf/network_helpers.h | 1 + .../selftests/bpf/prog_tests/bpf_tcp_ca.c | 81 +------------- 3 files changed, 104 insertions(+), 80 deletions(-) diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c index 04175e16195a..dc1fd7af9c7a 100644 --- a/tools/testing/selftests/bpf/network_helpers.c +++ b/tools/testing/selftests/bpf/network_helpers.c @@ -545,3 +545,105 @@ int set_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param) close(sockfd); return 0; } + +struct send_recv_arg { + int fd; + uint32_t bytes; + int stop; +}; + +static void *send_recv_server(void *arg) +{ + struct send_recv_arg *a = (struct send_recv_arg *)arg; + ssize_t nr_sent = 0, bytes = 0; + char batch[1500]; + int err = 0, fd; + + fd = accept(a->fd, NULL, NULL); + while (fd == -1) { + if (errno == EINTR) + continue; + err = -errno; + goto done; + } + + if (settimeo(fd, 0)) { + err = -errno; + goto done; + } + + while (bytes < a->bytes && !READ_ONCE(a->stop)) { + nr_sent = send(fd, &batch, + MIN(a->bytes - bytes, sizeof(batch)), 0); + if (nr_sent == -1 && errno == EINTR) + continue; + if (nr_sent == -1) { + err = -errno; + break; + } + bytes += nr_sent; + } + + if (bytes != a->bytes) { + log_err("send %zd expected %u", bytes, a->bytes); + if (!err) + err = bytes > a->bytes ? -E2BIG : -EINTR; + } + +done: + if (fd >= 0) + close(fd); + if (err) { + WRITE_ONCE(a->stop, 1); + return ERR_PTR(err); + } + return NULL; +} + +int send_recv_data(int lfd, int fd, uint32_t total_bytes) +{ + ssize_t nr_recv = 0, bytes = 0; + struct send_recv_arg arg = { + .fd = lfd, + .bytes = total_bytes, + .stop = 0, + }; + pthread_t srv_thread; + void *thread_ret; + char batch[1500]; + int err = 0; + + err = pthread_create(&srv_thread, NULL, send_recv_server, (void *)&arg); + if (err) { + log_err("Failed to pthread_create"); + return err; + } + + /* recv total_bytes */ + while (bytes < total_bytes && !READ_ONCE(arg.stop)) { + nr_recv = recv(fd, &batch, + MIN(total_bytes - bytes, sizeof(batch)), 0); + if (nr_recv == -1 && errno == EINTR) + continue; + if (nr_recv == -1) { + err = -errno; + break; + } + bytes += nr_recv; + } + + if (bytes != total_bytes) { + log_err("recv %zd expected %u", bytes, total_bytes); + if (!err) + err = bytes > total_bytes ? -E2BIG : -EINTR; + } + + WRITE_ONCE(arg.stop, 1); + pthread_join(srv_thread, &thread_ret); + if (IS_ERR(thread_ret)) { + log_err("Failed in thread_ret %ld", PTR_ERR(thread_ret)); + err = err ? : PTR_ERR(thread_ret); + } + + return err; +} diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h index 6457445cc6e2..70f4e4c92733 100644 --- a/tools/testing/selftests/bpf/network_helpers.h +++ b/tools/testing/selftests/bpf/network_helpers.h @@ -76,6 +76,7 @@ struct nstoken; */ struct nstoken *open_netns(const char *name); void close_netns(struct nstoken *token); +int send_recv_data(int lfd, int fd, uint32_t total_bytes); static __u16 csum_fold(__u32 csum) { diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c index 64f172f02a9a..907bac46c774 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c @@ -33,75 +33,15 @@ static int settcpca(int fd, const char *tcp_ca) return 0; } -struct send_recv_arg { - int fd; - uint32_t bytes; - int stop; -}; - -static void *server(void *arg) -{ - struct send_recv_arg *a = (struct send_recv_arg *)arg; - ssize_t nr_sent = 0, bytes = 0; - char batch[1500]; - int err = 0, fd; - - fd = accept(a->fd, NULL, NULL); - while (fd == -1) { - if (errno == EINTR) - continue; - err = -errno; - goto done; - } - - if (settimeo(fd, 0)) { - err = -errno; - goto done; - } - - while (bytes < a->bytes && !READ_ONCE(a->stop)) { - nr_sent = send(fd, &batch, - MIN(a->bytes - bytes, sizeof(batch)), 0); - if (nr_sent == -1 && errno == EINTR) - continue; - if (nr_sent == -1) { - err = -errno; - break; - } - bytes += nr_sent; - } - - ASSERT_EQ(bytes, a->bytes, "send"); - -done: - if (fd >= 0) - close(fd); - if (err) { - WRITE_ONCE(a->stop, 1); - return ERR_PTR(err); - } - return NULL; -} - static void do_test(const char *tcp_ca, const struct bpf_map *sk_stg_map) { - ssize_t nr_recv = 0, bytes = 0; - struct send_recv_arg arg = { - .bytes = total_bytes, - .stop = 0, - }; int lfd = -1, fd = -1; - pthread_t srv_thread; - void *thread_ret; - char batch[1500]; int err; lfd = start_server(AF_INET6, SOCK_STREAM, NULL, 0, 0); if (!ASSERT_NEQ(lfd, -1, "socket")) return; - arg.fd = lfd; - fd = socket(AF_INET6, SOCK_STREAM, 0); if (!ASSERT_NEQ(fd, -1, "socket")) { close(lfd); @@ -133,26 +73,7 @@ static void do_test(const char *tcp_ca, const struct bpf_map *sk_stg_map) goto done; } - err = pthread_create(&srv_thread, NULL, server, (void *)&arg); - if (!ASSERT_OK(err, "pthread_create")) - goto done; - - /* recv total_bytes */ - while (bytes < total_bytes && !READ_ONCE(arg.stop)) { - nr_recv = recv(fd, &batch, - MIN(total_bytes - bytes, sizeof(batch)), 0); - if (nr_recv == -1 && errno == EINTR) - continue; - if (nr_recv == -1) - break; - bytes += nr_recv; - } - - ASSERT_EQ(bytes, total_bytes, "recv"); - - WRITE_ONCE(arg.stop, 1); - pthread_join(srv_thread, &thread_ret); - ASSERT_OK(IS_ERR(thread_ret), "thread_ret"); + ASSERT_OK(send_recv_data(lfd, fd, total_bytes), "send_recv_data"); done: close(lfd);