4 * IO engine that reads/writes to/from sockets.
12 #include <netinet/in.h>
13 #include <arpa/inet.h>
16 #include <sys/types.h>
17 #include <sys/socket.h>
28 struct sockaddr_in addr;
31 struct udp_close_msg {
37 FIO_LINK_CLOSE = 0x89,
38 FIO_LINK_CLOSE_MAGIC = 0x6c696e6b,
42 * Return -1 for error and 'nr events' for a positive number
45 static int poll_wait(struct thread_data *td, int fd, short events)
50 while (!td->terminate) {
53 ret = poll(&pfd, 1, -1);
58 td_verror(td, errno, "poll");
66 if (pfd.revents & events)
72 static int fio_netio_prep(struct thread_data *td, struct io_u *io_u)
74 struct netio_data *nd = td->io_ops->data;
77 * Make sure we don't see spurious reads to a receiver, and vice versa
79 if ((nd->send_to_net && io_u->ddir == DDIR_READ) ||
80 (!nd->send_to_net && io_u->ddir == DDIR_WRITE)) {
81 td_verror(td, EINVAL, "bad direction");
88 #ifdef FIO_HAVE_SPLICE
89 static int splice_io_u(int fdin, int fdout, unsigned int len)
94 int ret = splice(fdin, NULL, fdout, NULL, len, 0);
112 * Receive bytes from a socket and fill them into the internal pipe
114 static int splice_in(struct thread_data *td, struct io_u *io_u)
116 struct netio_data *nd = td->io_ops->data;
118 return splice_io_u(io_u->file->fd, nd->pipes[1], io_u->xfer_buflen);
122 * Transmit 'len' bytes from the internal pipe
124 static int splice_out(struct thread_data *td, struct io_u *io_u,
127 struct netio_data *nd = td->io_ops->data;
129 return splice_io_u(nd->pipes[0], io_u->file->fd, len);
132 static int vmsplice_io_u(struct io_u *io_u, int fd, unsigned int len)
135 .iov_base = io_u->xfer_buf,
140 while (iov.iov_len) {
141 int ret = vmsplice(fd, &iov, 1, SPLICE_F_MOVE);
160 * vmsplice() pipe to io_u buffer
162 static int vmsplice_io_u_out(struct thread_data *td, struct io_u *io_u,
165 struct netio_data *nd = td->io_ops->data;
167 return vmsplice_io_u(io_u, nd->pipes[0], len);
171 * vmsplice() io_u to pipe
173 static int vmsplice_io_u_in(struct thread_data *td, struct io_u *io_u)
175 struct netio_data *nd = td->io_ops->data;
177 return vmsplice_io_u(io_u, nd->pipes[1], io_u->xfer_buflen);
181 * splice receive - transfer socket data into a pipe using splice, then map
182 * that pipe data into the io_u using vmsplice.
184 static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u)
188 ret = splice_in(td, io_u);
190 return vmsplice_io_u_out(td, io_u, ret);
196 * splice transmit - map data from the io_u into a pipe by using vmsplice,
197 * then transfer that pipe to a socket using splice.
199 static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u)
203 ret = vmsplice_io_u_in(td, io_u);
205 return splice_out(td, io_u, ret);
210 static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u)
216 static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u)
223 static int fio_netio_send(struct thread_data *td, struct io_u *io_u)
225 struct netio_data *nd = td->io_ops->data;
226 int ret, flags = MSG_DONTWAIT;
229 if (nd->net_protocol == IPPROTO_UDP) {
230 struct sockaddr *to = (struct sockaddr *) &nd->addr;
232 ret = sendto(io_u->file->fd, io_u->xfer_buf,
233 io_u->xfer_buflen, flags, to,
237 * if we are going to write more, set MSG_MORE
240 if (td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen <
244 ret = send(io_u->file->fd, io_u->xfer_buf,
245 io_u->xfer_buflen, flags);
250 ret = poll_wait(td, io_u->file->fd, POLLOUT);
254 flags &= ~MSG_DONTWAIT;
260 static int is_udp_close(struct io_u *io_u, int len)
262 struct udp_close_msg *msg;
264 if (len != sizeof(struct udp_close_msg))
267 msg = io_u->xfer_buf;
268 if (ntohl(msg->magic) != FIO_LINK_CLOSE_MAGIC)
270 if (ntohl(msg->cmd) != FIO_LINK_CLOSE)
276 static int fio_netio_recv(struct thread_data *td, struct io_u *io_u)
278 struct netio_data *nd = td->io_ops->data;
279 int ret, flags = MSG_DONTWAIT;
282 if (nd->net_protocol == IPPROTO_UDP) {
283 socklen_t len = sizeof(nd->addr);
284 struct sockaddr *from = (struct sockaddr *) &nd->addr;
286 ret = recvfrom(io_u->file->fd, io_u->xfer_buf,
287 io_u->xfer_buflen, flags, from, &len);
288 if (is_udp_close(io_u, ret)) {
293 ret = recv(io_u->file->fd, io_u->xfer_buf,
294 io_u->xfer_buflen, flags);
299 ret = poll_wait(td, io_u->file->fd, POLLIN);
302 flags &= ~MSG_DONTWAIT;
303 flags |= MSG_WAITALL;
309 static int fio_netio_queue(struct thread_data *td, struct io_u *io_u)
311 struct netio_data *nd = td->io_ops->data;
314 fio_ro_check(td, io_u);
316 if (io_u->ddir == DDIR_WRITE) {
317 if (!nd->use_splice || nd->net_protocol == IPPROTO_UDP)
318 ret = fio_netio_send(td, io_u);
320 ret = fio_netio_splice_out(td, io_u);
321 } else if (io_u->ddir == DDIR_READ) {
322 if (!nd->use_splice || nd->net_protocol == IPPROTO_UDP)
323 ret = fio_netio_recv(td, io_u);
325 ret = fio_netio_splice_in(td, io_u);
327 ret = 0; /* must be a SYNC */
329 if (ret != (int) io_u->xfer_buflen) {
331 io_u->resid = io_u->xfer_buflen - ret;
333 return FIO_Q_COMPLETED;
337 if (io_u->ddir == DDIR_WRITE && err == EMSGSIZE)
345 td_verror(td, io_u->error, "xfer");
347 return FIO_Q_COMPLETED;
350 static int fio_netio_connect(struct thread_data *td, struct fio_file *f)
352 struct netio_data *nd = td->io_ops->data;
355 if (nd->net_protocol == IPPROTO_TCP)
360 f->fd = socket(AF_INET, type, nd->net_protocol);
362 td_verror(td, errno, "socket");
366 if (nd->net_protocol == IPPROTO_UDP)
369 if (connect(f->fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) {
370 td_verror(td, errno, "connect");
377 static int fio_netio_accept(struct thread_data *td, struct fio_file *f)
379 struct netio_data *nd = td->io_ops->data;
380 socklen_t socklen = sizeof(nd->addr);
382 if (nd->net_protocol == IPPROTO_UDP) {
383 f->fd = nd->listenfd;
387 log_info("fio: waiting for connection\n");
389 if (poll_wait(td, nd->listenfd, POLLIN) < 0)
392 f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr, &socklen);
394 td_verror(td, errno, "accept");
401 static int fio_netio_open_file(struct thread_data *td, struct fio_file *f)
404 return fio_netio_accept(td, f);
406 return fio_netio_connect(td, f);
409 static void fio_netio_udp_close(struct thread_data *td, struct fio_file *f)
411 struct netio_data *nd = td->io_ops->data;
412 struct udp_close_msg msg;
413 struct sockaddr *to = (struct sockaddr *) &nd->addr;
416 msg.magic = htonl(FIO_LINK_CLOSE_MAGIC);
417 msg.cmd = htonl(FIO_LINK_CLOSE);
419 ret = sendto(f->fd, &msg, sizeof(msg), MSG_WAITALL, to,
422 td_verror(td, errno, "sendto udp link close");
425 static int fio_netio_close_file(struct thread_data *td, struct fio_file *f)
427 struct netio_data *nd = td->io_ops->data;
430 * If this is an UDP connection, notify the receiver that we are
431 * closing down the link
433 if (nd->net_protocol == IPPROTO_UDP)
434 fio_netio_udp_close(td, f);
436 return generic_close_file(td, f);
439 static int fio_netio_setup_connect(struct thread_data *td, const char *host,
442 struct netio_data *nd = td->io_ops->data;
444 nd->addr.sin_family = AF_INET;
445 nd->addr.sin_port = htons(port);
447 if (inet_aton(host, &nd->addr.sin_addr) != 1) {
448 struct hostent *hent;
450 hent = gethostbyname(host);
452 td_verror(td, errno, "gethostbyname");
456 memcpy(&nd->addr.sin_addr, hent->h_addr, 4);
462 static int fio_netio_setup_listen(struct thread_data *td, short port)
464 struct netio_data *nd = td->io_ops->data;
467 if (nd->net_protocol == IPPROTO_TCP)
472 fd = socket(AF_INET, type, nd->net_protocol);
474 td_verror(td, errno, "socket");
479 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
480 td_verror(td, errno, "setsockopt");
484 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
485 td_verror(td, errno, "setsockopt");
490 nd->addr.sin_family = AF_INET;
491 nd->addr.sin_addr.s_addr = htonl(INADDR_ANY);
492 nd->addr.sin_port = htons(port);
494 if (bind(fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) {
495 td_verror(td, errno, "bind");
498 if (nd->net_protocol == IPPROTO_TCP && listen(fd, 1) < 0) {
499 td_verror(td, errno, "listen");
507 static int fio_netio_init(struct thread_data *td)
509 struct netio_data *nd = td->io_ops->data;
511 char host[64], buf[128];
512 char *sep, *portp, *modep;
516 log_err("fio: network connections must be read OR write\n");
520 log_err("fio: network IO can't be random\n");
524 strcpy(buf, td->o.filename);
526 sep = strchr(buf, '/');
538 sep = strchr(portp, '/');
544 port = strtol(portp, NULL, 10);
545 if (!port || port > 65535)
549 if (!strncmp("tcp", modep, strlen(modep)) ||
550 !strncmp("TCP", modep, strlen(modep)))
551 nd->net_protocol = IPPROTO_TCP;
552 else if (!strncmp("udp", modep, strlen(modep)) ||
553 !strncmp("UDP", modep, strlen(modep)))
554 nd->net_protocol = IPPROTO_UDP;
558 nd->net_protocol = IPPROTO_TCP;
562 ret = fio_netio_setup_listen(td, port);
565 ret = fio_netio_setup_connect(td, host, port);
570 log_err("fio: bad network host/port/protocol: %s\n", td->o.filename);
574 static void fio_netio_cleanup(struct thread_data *td)
576 struct netio_data *nd = td->io_ops->data;
579 if (nd->listenfd != -1)
581 if (nd->pipes[0] != -1)
583 if (nd->pipes[1] != -1)
590 static int fio_netio_setup(struct thread_data *td)
592 struct netio_data *nd;
594 if (!td->io_ops->data) {
595 nd = malloc(sizeof(*nd));;
597 memset(nd, 0, sizeof(*nd));
599 nd->pipes[0] = nd->pipes[1] = -1;
600 td->io_ops->data = nd;
606 #ifdef FIO_HAVE_SPLICE
607 static int fio_netio_setup_splice(struct thread_data *td)
609 struct netio_data *nd;
613 nd = td->io_ops->data;
615 if (pipe(nd->pipes) < 0)
625 static struct ioengine_ops ioengine_splice = {
627 .version = FIO_IOOPS_VERSION,
628 .prep = fio_netio_prep,
629 .queue = fio_netio_queue,
630 .setup = fio_netio_setup_splice,
631 .init = fio_netio_init,
632 .cleanup = fio_netio_cleanup,
633 .open_file = fio_netio_open_file,
634 .close_file = generic_close_file,
635 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
636 FIO_SIGQUIT | FIO_PIPEIO,
640 static struct ioengine_ops ioengine_rw = {
642 .version = FIO_IOOPS_VERSION,
643 .prep = fio_netio_prep,
644 .queue = fio_netio_queue,
645 .setup = fio_netio_setup,
646 .init = fio_netio_init,
647 .cleanup = fio_netio_cleanup,
648 .open_file = fio_netio_open_file,
649 .close_file = fio_netio_close_file,
650 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
651 FIO_SIGQUIT | FIO_PIPEIO,
654 static void fio_init fio_netio_register(void)
656 register_ioengine(&ioengine_rw);
657 #ifdef FIO_HAVE_SPLICE
658 register_ioengine(&ioengine_splice);
662 static void fio_exit fio_netio_unregister(void)
664 unregister_ioengine(&ioengine_rw);
665 #ifdef FIO_HAVE_SPLICE
666 unregister_ioengine(&ioengine_splice);