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Mon, 30 Jun 2025 09:07:50 -0700 (PDT) Received: from 127.com ([2620:10d:c090:600::1:335c]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b34e320fc3bsm7577870a12.75.2025.06.30.09.07.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Jun 2025 09:07:49 -0700 (PDT) From: Pavel Begunkov To: io-uring@vger.kernel.org Cc: asml.silence@gmail.com Subject: [PATCH 2/2] tests: timestamp example Date: Mon, 30 Jun 2025 17:09:10 +0100 Message-ID: <4ba2daee657f4ff41fe4bcae1f75bc0ad7079d6d.1751299730.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Signed-off-by: Pavel Begunkov --- test/Makefile | 1 + test/timestamp.c | 376 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 377 insertions(+) create mode 100644 test/timestamp.c diff --git a/test/Makefile b/test/Makefile index ee09f5a8..99b272d7 100644 --- a/test/Makefile +++ b/test/Makefile @@ -249,6 +249,7 @@ test_srcs := \ xattr.c \ zcrx.c \ vec-regbuf.c \ + timestamp.c \ # EOL # Please keep this list sorted alphabetically. diff --git a/test/timestamp.c b/test/timestamp.c new file mode 100644 index 00000000..47c82d9a --- /dev/null +++ b/test/timestamp.c @@ -0,0 +1,376 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "liburing.h" +#include "helpers.h" + +#ifndef SCM_TS_OPT_ID +#define SCM_TS_OPT_ID 0 +#endif + +static const int cfg_payload_len = 10; +static uint16_t dest_port = 9000; +static uint32_t ts_opt_id = 81; +static bool cfg_use_cmsg_opt_id = false; +static char buffer[128]; +static const bool verbose = false; + +static struct sockaddr_in6 daddr6; + +static int saved_tskey = -1; +static int saved_tskey_type = -1; + +struct ctx { + int family; + int proto; + int report_opt; + int num_pkts; +}; + +static int validate_key(int tskey, int tstype, struct ctx *ctx) +{ + int stepsize; + + /* compare key for each subsequent request + * must only test for one type, the first one requested + */ + if (saved_tskey == -1 || cfg_use_cmsg_opt_id) + saved_tskey_type = tstype; + else if (saved_tskey_type != tstype) + return 0; + + stepsize = ctx->proto == SOCK_STREAM ? cfg_payload_len : 1; + stepsize = cfg_use_cmsg_opt_id ? 0 : stepsize; + if (tskey != saved_tskey + stepsize) { + fprintf(stderr, "ERROR: key %d, expected %d\n", + tskey, saved_tskey + stepsize); + return -EINVAL; + } + + saved_tskey = tskey; + return 0; +} + +static int test_prep_sock(int family, int proto, unsigned report_opt) +{ + int ipproto = proto == SOCK_STREAM ? IPPROTO_TCP : IPPROTO_UDP; + unsigned int sock_opt; + int fd, val = 1; + + fd = socket(family, proto, ipproto); + if (fd < 0) + error(1, errno, "socket"); + + if (proto == SOCK_STREAM) { + if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, + (char*) &val, sizeof(val))) + error(1, 0, "setsockopt no nagle"); + + if (connect(fd, (void *) &daddr6, sizeof(daddr6))) + error(1, errno, "connect ipv6"); + } + + sock_opt = SOF_TIMESTAMPING_SOFTWARE | + SOF_TIMESTAMPING_OPT_CMSG | + SOF_TIMESTAMPING_OPT_ID; + sock_opt |= report_opt; + sock_opt |= SOF_TIMESTAMPING_OPT_TSONLY; + + if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING, + (char *) &sock_opt, sizeof(sock_opt))) + error(1, 0, "setsockopt timestamping"); + + return fd; +} + +#define MAX_PACKETS 32 + +struct send_req { + struct msghdr msg; + struct iovec iov; + char control[CMSG_SPACE(sizeof(uint32_t))]; +}; + +static void queue_ts_cmd(struct io_uring *ring, int fd) +{ + struct io_uring_sqe *sqe; + + sqe = io_uring_get_sqe(ring); + io_uring_prep_rw(IORING_OP_URING_CMD, sqe, fd, NULL, 0, 0); + sqe->cmd_op = SOCKET_URING_OP_TX_TIMESTAMP; + sqe->user_data = 43; +} + +static void queue_send(struct io_uring *ring, int fd, void *buf, struct send_req *r, + int proto) +{ + struct io_uring_sqe *sqe; + + r->iov.iov_base = buf; + r->iov.iov_len = cfg_payload_len; + + memset(&r->msg, 0, sizeof(r->msg)); + r->msg.msg_iov = &r->iov; + r->msg.msg_iovlen = 1; + if (proto == SOCK_STREAM) { + r->msg.msg_name = (void *)&daddr6; + r->msg.msg_namelen = sizeof(daddr6); + } + + if (cfg_use_cmsg_opt_id) { + struct cmsghdr *cmsg; + + memset(r->control, 0, sizeof(r->control)); + r->msg.msg_control = r->control; + r->msg.msg_controllen = CMSG_SPACE(sizeof(uint32_t)); + + cmsg = CMSG_FIRSTHDR(&r->msg); + cmsg->cmsg_level = SOL_SOCKET; + cmsg->cmsg_type = SCM_TS_OPT_ID; + cmsg->cmsg_len = CMSG_LEN(sizeof(uint32_t)); + + *((uint32_t *)CMSG_DATA(cmsg)) = ts_opt_id; + saved_tskey = ts_opt_id; + } + + sqe = io_uring_get_sqe(ring); + io_uring_prep_sendmsg(sqe, fd, &r->msg, 0); + sqe->user_data = 0; +} + +static const char *get_tstype_name(int tstype) +{ + if (tstype == SCM_TSTAMP_SCHED) + return "ENQ"; + if (tstype == SCM_TSTAMP_SND) + return "SND"; + if (tstype == SCM_TSTAMP_ACK) + return "ACK"; + return "unknown"; +} + +static int do_test(struct ctx *ctx) +{ + struct send_req reqs[MAX_PACKETS]; + struct io_uring_cqe *cqe; + struct io_uring ring; + unsigned long head; + int cqes_seen = 0; + int i, fd, ret; + int ts_expected = 0, ts_got = 0; + + ts_expected += !!(ctx->report_opt & SOF_TIMESTAMPING_TX_SCHED); + ts_expected += !!(ctx->report_opt & SOF_TIMESTAMPING_TX_SOFTWARE); + ts_expected += !!(ctx->report_opt & SOF_TIMESTAMPING_TX_ACK); + + ret = t_create_ring(32, &ring, IORING_SETUP_CQE32); + if (ret == T_SETUP_SKIP) + return T_EXIT_SKIP; + else if (ret) + t_error(1, ret, "queue init\n"); + + assert(ctx->num_pkts <= MAX_PACKETS); + + fd = test_prep_sock(ctx->family, ctx->proto, ctx->report_opt); + if (fd < 0) + t_error(1, fd, "can't create socket\n"); + + memset(buffer, 'a', cfg_payload_len); + saved_tskey = -1; + + if (cfg_use_cmsg_opt_id) + saved_tskey = ts_opt_id; + + for (i = 0; i < ctx->num_pkts; i++) { + queue_send(&ring, fd, buffer, &reqs[i], ctx->proto); + ret = io_uring_submit(&ring); + if (ret != 1) + t_error(1, ret, "submit failed"); + + ret = io_uring_wait_cqe(&ring, &cqe); + if (ret || cqe->res != cfg_payload_len) { + fprintf(stderr, "wait send cqe, %d %d, expected %d\n", + ret, cqe->res, cfg_payload_len); + return T_EXIT_FAIL; + } + io_uring_cqe_seen(&ring, cqe); + } + + usleep(200000); + + queue_ts_cmd(&ring, fd); + ret = io_uring_submit(&ring); + if (ret != 1) + t_error(1, ret, "submit failed"); + + ret = io_uring_wait_cqe(&ring, &cqe); + if (ret) { + fprintf(stderr, "wait_cqe failed %d\n", ret); + return T_EXIT_FAIL; + } + + io_uring_for_each_cqe(&ring, head, cqe) { + struct io_timespec *ts; + int tskey, tstype; + bool hwts; + + cqes_seen++; + + if (!(cqe->flags & IORING_CQE_F_MORE)) { + if (cqe->res == -EINVAL || cqe->res == -EOPNOTSUPP) + return T_EXIT_SKIP; + if (cqe->res) + t_error(1, 0, "failed cqe %i", cqe->res); + break; + } + + ts = (void *)(cqe + 1); + tstype = cqe->flags >> IORING_TIMESTAMP_TYPE_SHIFT; + tskey = cqe->res; + hwts = cqe->flags & IORING_CQE_F_TSTAMP_HW; + + ts_got++; + if (verbose) + fprintf(stderr, "ts: key %x, type %i (%s), is hw %i, sec %lu, nsec %lu\n", + tskey, tstype, get_tstype_name(tstype), hwts, + (unsigned long)ts->tv_sec, + (unsigned long)ts->tv_nsec); + + ret = validate_key(tskey, tstype, ctx); + if (ret) + return T_EXIT_FAIL; + } + + if (ts_got != ts_expected) { + fprintf(stderr, "expected %i timestamps, got %i\n", + ts_expected, ts_got); + return -EINVAL; + } + + close(fd); + io_uring_cq_advance(&ring, cqes_seen); + io_uring_queue_exit(&ring); + return T_EXIT_PASS; +} + +static void resolve_hostname(const char *name, int port) +{ + memset(&daddr6, 0, sizeof(daddr6)); + daddr6.sin6_family = AF_INET6; + daddr6.sin6_port = htons(port); + if (inet_pton(AF_INET6, name, &daddr6.sin6_addr) != 1) + t_error(1, 0, "ipv6 parse error: %s", name); +} + +static void do_listen(int family, int type, void *addr, int alen) +{ + int fd; + + fd = socket(family, type, 0); + if (fd == -1) + error(1, errno, "socket rx"); + + if (bind(fd, addr, alen)) + error(1, errno, "bind rx"); + + if (type == SOCK_STREAM && listen(fd, 10)) + error(1, errno, "listen rx"); + + /* leave fd open, will be closed on process exit. + * this enables connect() to succeed and avoids icmp replies + */ +} + +static int do_main(int family, int proto) +{ + struct ctx ctx; + int ret; + + ctx.num_pkts = 1; + ctx.family = family; + ctx.proto = proto; + + if (verbose) + fprintf(stderr, "test SND\n"); + ctx.report_opt = SOF_TIMESTAMPING_TX_SOFTWARE; + ret = do_test(&ctx); + if (ret) { + if (ret == T_EXIT_SKIP) + fprintf(stderr, "no timestamp cmd, skip\n"); + return ret; + } + + if (verbose) + fprintf(stderr, "test ENQ\n"); + ctx.report_opt = SOF_TIMESTAMPING_TX_SCHED; + ret = do_test(&ctx); + if (ret) + return T_EXIT_FAIL; + + if (verbose) + fprintf(stderr, "test ENQ + SND\n"); + ctx.report_opt = SOF_TIMESTAMPING_TX_SCHED | SOF_TIMESTAMPING_TX_SOFTWARE; + ret = do_test(&ctx); + if (ret) + return T_EXIT_FAIL; + + if (proto == SOCK_STREAM) { + if (verbose) + fprintf(stderr, "test ACK\n"); + ctx.report_opt = SOF_TIMESTAMPING_TX_ACK; + ret = do_test(&ctx); + if (ret) + return T_EXIT_FAIL; + + if (verbose) + fprintf(stderr, "test SND + ACK\n"); + ctx.report_opt = SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_TX_ACK; + ret = do_test(&ctx); + if (ret) + return T_EXIT_FAIL; + + if (verbose) + fprintf(stderr, "test ENQ + SND + ACK\n"); + ctx.report_opt = SOF_TIMESTAMPING_TX_SCHED | + SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_TX_ACK; + ret = do_test(&ctx); + if (ret) + return T_EXIT_FAIL; + } + return 0; +} + +int main(int argc, char **argv) +{ + const char *hostname; + + if (SCM_TS_OPT_ID == 0) { + fprintf(stderr, "no SCM_TS_OPT_ID, skip\n"); + return T_EXIT_SKIP; + } + + hostname = "::1"; + resolve_hostname(hostname, dest_port); + do_listen(PF_INET6, SOCK_STREAM, &daddr6, sizeof(daddr6)); + return do_main(PF_INET6, SOCK_STREAM); +} -- 2.49.0