diff options
Diffstat (limited to 'tools/testing/selftests/net/io_uring_zerocopy_tx.c')
| -rw-r--r-- | tools/testing/selftests/net/io_uring_zerocopy_tx.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/io_uring_zerocopy_tx.c b/tools/testing/selftests/net/io_uring_zerocopy_tx.c new file mode 100644 index 000000000000..76e604e4810e --- /dev/null +++ b/tools/testing/selftests/net/io_uring_zerocopy_tx.c @@ -0,0 +1,320 @@ +/* SPDX-License-Identifier: MIT */ +/* based on linux-kernel/tools/testing/selftests/net/msg_zerocopy.c */ +#include <assert.h> +#include <errno.h> +#include <error.h> +#include <fcntl.h> +#include <limits.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <arpa/inet.h> +#include <linux/errqueue.h> +#include <linux/if_packet.h> +#include <linux/io_uring.h> +#include <linux/ipv6.h> +#include <linux/socket.h> +#include <linux/sockios.h> +#include <net/ethernet.h> +#include <net/if.h> +#include <netinet/in.h> +#include <netinet/ip.h> +#include <netinet/ip6.h> +#include <netinet/tcp.h> +#include <netinet/udp.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/resource.h> +#include <sys/socket.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/un.h> +#include <sys/wait.h> + +#include <io_uring/mini_liburing.h> + +#define NOTIF_TAG 0xfffffffULL +#define NONZC_TAG 0 +#define ZC_TAG 1 + +enum { + MODE_NONZC = 0, + MODE_ZC = 1, + MODE_ZC_FIXED = 2, + MODE_MIXED = 3, +}; + +static bool cfg_cork = false; +static int cfg_mode = MODE_ZC_FIXED; +static int cfg_nr_reqs = 8; +static int cfg_family = PF_UNSPEC; +static int cfg_payload_len; +static int cfg_port = 8000; +static int cfg_runtime_ms = 4200; + +static socklen_t cfg_alen; +static struct sockaddr_storage cfg_dst_addr; + +static char payload[IP_MAXPACKET] __attribute__((aligned(4096))); + +static unsigned long gettimeofday_ms(void) +{ + struct timeval tv; + + gettimeofday(&tv, NULL); + return (tv.tv_sec * 1000) + (tv.tv_usec / 1000); +} + +static void do_setsockopt(int fd, int level, int optname, int val) +{ + if (setsockopt(fd, level, optname, &val, sizeof(val))) + error(1, errno, "setsockopt %d.%d: %d", level, optname, val); +} + +static int do_setup_tx(int domain, int type, int protocol) +{ + int fd; + + fd = socket(domain, type, protocol); + if (fd == -1) + error(1, errno, "socket t"); + + do_setsockopt(fd, SOL_SOCKET, SO_SNDBUF, 1 << 21); + + if (connect(fd, (void *) &cfg_dst_addr, cfg_alen)) + error(1, errno, "connect"); + return fd; +} + +static void do_tx(int domain, int type, int protocol) +{ + struct io_uring_sqe *sqe; + struct io_uring_cqe *cqe; + unsigned long packets = 0, bytes = 0; + struct io_uring ring; + struct iovec iov; + uint64_t tstop; + int i, fd, ret; + int compl_cqes = 0; + + fd = do_setup_tx(domain, type, protocol); + + ret = io_uring_queue_init(512, &ring, 0); + if (ret) + error(1, ret, "io_uring: queue init"); + + iov.iov_base = payload; + iov.iov_len = cfg_payload_len; + + ret = io_uring_register_buffers(&ring, &iov, 1); + if (ret) + error(1, ret, "io_uring: buffer registration"); + + tstop = gettimeofday_ms() + cfg_runtime_ms; + do { + if (cfg_cork) + do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 1); + + for (i = 0; i < cfg_nr_reqs; i++) { + unsigned zc_flags = 0; + unsigned buf_idx = 0; + unsigned mode = cfg_mode; + unsigned msg_flags = MSG_WAITALL; + + if (cfg_mode == MODE_MIXED) + mode = rand() % 3; + + sqe = io_uring_get_sqe(&ring); + + if (mode == MODE_NONZC) { + io_uring_prep_send(sqe, fd, payload, + cfg_payload_len, msg_flags); + sqe->user_data = NONZC_TAG; + } else { + io_uring_prep_sendzc(sqe, fd, payload, + cfg_payload_len, + msg_flags, zc_flags); + if (mode == MODE_ZC_FIXED) { + sqe->ioprio |= IORING_RECVSEND_FIXED_BUF; + sqe->buf_index = buf_idx; + } + sqe->user_data = ZC_TAG; + } + } + + ret = io_uring_submit(&ring); + if (ret != cfg_nr_reqs) + error(1, ret, "submit"); + + if (cfg_cork) + do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 0); + for (i = 0; i < cfg_nr_reqs; i++) { + ret = io_uring_wait_cqe(&ring, &cqe); + if (ret) + error(1, ret, "wait cqe"); + + if (cqe->user_data != NONZC_TAG && + cqe->user_data != ZC_TAG) + error(1, -EINVAL, "invalid cqe->user_data"); + + if (cqe->flags & IORING_CQE_F_NOTIF) { + if (cqe->flags & IORING_CQE_F_MORE) + error(1, -EINVAL, "invalid notif flags"); + if (compl_cqes <= 0) + error(1, -EINVAL, "notification mismatch"); + compl_cqes--; + i--; + io_uring_cqe_seen(&ring); + continue; + } + if (cqe->flags & IORING_CQE_F_MORE) { + if (cqe->user_data != ZC_TAG) + error(1, cqe->res, "unexpected F_MORE"); + compl_cqes++; + } + if (cqe->res >= 0) { + packets++; + bytes += cqe->res; + } else if (cqe->res != -EAGAIN) { + error(1, cqe->res, "send failed"); + } + io_uring_cqe_seen(&ring); + } + } while (gettimeofday_ms() < tstop); + + while (compl_cqes) { + ret = io_uring_wait_cqe(&ring, &cqe); + if (ret) + error(1, ret, "wait cqe"); + if (cqe->flags & IORING_CQE_F_MORE) + error(1, -EINVAL, "invalid notif flags"); + if (!(cqe->flags & IORING_CQE_F_NOTIF)) + error(1, -EINVAL, "missing notif flag"); + + io_uring_cqe_seen(&ring); + compl_cqes--; + } + + fprintf(stderr, "tx=%lu (MB=%lu), tx/s=%lu (MB/s=%lu)\n", + packets, bytes >> 20, + packets / (cfg_runtime_ms / 1000), + (bytes >> 20) / (cfg_runtime_ms / 1000)); + + if (close(fd)) + error(1, errno, "close"); +} + +static void do_test(int domain, int type, int protocol) +{ + int i; + + for (i = 0; i < IP_MAXPACKET; i++) + payload[i] = 'a' + (i % 26); + do_tx(domain, type, protocol); +} + +static void usage(const char *filepath) +{ + error(1, 0, "Usage: %s (-4|-6) (udp|tcp) -D<dst_ip> [-s<payload size>] " + "[-t<time s>] [-n<batch>] [-p<port>] [-m<mode>]", filepath); +} + +static void parse_opts(int argc, char **argv) +{ + const int max_payload_len = sizeof(payload) - + sizeof(struct ipv6hdr) - + sizeof(struct tcphdr) - + 40 /* max tcp options */; + struct sockaddr_in6 *addr6 = (void *) &cfg_dst_addr; + struct sockaddr_in *addr4 = (void *) &cfg_dst_addr; + char *daddr = NULL; + int c; + + if (argc <= 1) + usage(argv[0]); + cfg_payload_len = max_payload_len; + + while ((c = getopt(argc, argv, "46D:p:s:t:n:c:m:")) != -1) { + switch (c) { + case '4': + if (cfg_family != PF_UNSPEC) + error(1, 0, "Pass one of -4 or -6"); + cfg_family = PF_INET; + cfg_alen = sizeof(struct sockaddr_in); + break; + case '6': + if (cfg_family != PF_UNSPEC) + error(1, 0, "Pass one of -4 or -6"); + cfg_family = PF_INET6; + cfg_alen = sizeof(struct sockaddr_in6); + break; + case 'D': + daddr = optarg; + break; + case 'p': + cfg_port = strtoul(optarg, NULL, 0); + break; + case 's': + cfg_payload_len = strtoul(optarg, NULL, 0); + break; + case 't': + cfg_runtime_ms = 200 + strtoul(optarg, NULL, 10) * 1000; + break; + case 'n': + cfg_nr_reqs = strtoul(optarg, NULL, 0); + break; + case 'c': + cfg_cork = strtol(optarg, NULL, 0); + break; + case 'm': + cfg_mode = strtol(optarg, NULL, 0); + break; + } + } + + switch (cfg_family) { + case PF_INET: + memset(addr4, 0, sizeof(*addr4)); + addr4->sin_family = AF_INET; + addr4->sin_port = htons(cfg_port); + if (daddr && + inet_pton(AF_INET, daddr, &(addr4->sin_addr)) != 1) + error(1, 0, "ipv4 parse error: %s", daddr); + break; + case PF_INET6: + memset(addr6, 0, sizeof(*addr6)); + addr6->sin6_family = AF_INET6; + addr6->sin6_port = htons(cfg_port); + if (daddr && + inet_pton(AF_INET6, daddr, &(addr6->sin6_addr)) != 1) + error(1, 0, "ipv6 parse error: %s", daddr); + break; + default: + error(1, 0, "illegal domain"); + } + + if (cfg_payload_len > max_payload_len) + error(1, 0, "-s: payload exceeds max (%d)", max_payload_len); + if (optind != argc - 1) + usage(argv[0]); +} + +int main(int argc, char **argv) +{ + const char *cfg_test = argv[argc - 1]; + + parse_opts(argc, argv); + + if (!strcmp(cfg_test, "tcp")) + do_test(cfg_family, SOCK_STREAM, 0); + else if (!strcmp(cfg_test, "udp")) + do_test(cfg_family, SOCK_DGRAM, 0); + else + error(1, 0, "unknown cfg_test %s", cfg_test); + return 0; +} |