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num2str: add arguments to represent values in terms of bytes/bits
[fio.git] / engines / net.c
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1/*
2 * net engine
3 *
4 * IO engine that reads/writes to/from sockets.
5 *
6 */
7#include <stdio.h>
8#include <stdlib.h>
9#include <unistd.h>
10#include <signal.h>
11#include <errno.h>
12#include <assert.h>
13#include <netinet/in.h>
14#include <netinet/tcp.h>
15#include <arpa/inet.h>
16#include <netdb.h>
17#include <sys/poll.h>
18#include <sys/types.h>
19#include <sys/stat.h>
20#include <sys/socket.h>
21#include <sys/un.h>
22
23#include "../fio.h"
24
25struct netio_data {
26 int listenfd;
27 int use_splice;
28 int pipes[2];
29 struct sockaddr_in addr;
30 struct sockaddr_un addr_un;
31};
32
33struct netio_options {
34 struct thread_data *td;
35 unsigned int port;
36 unsigned int proto;
37 unsigned int listen;
38 unsigned int pingpong;
39 unsigned int nodelay;
40};
41
42struct udp_close_msg {
43 uint32_t magic;
44 uint32_t cmd;
45};
46
47enum {
48 FIO_LINK_CLOSE = 0x89,
49 FIO_LINK_OPEN_CLOSE_MAGIC = 0x6c696e6b,
50 FIO_LINK_OPEN = 0x98,
51
52 FIO_TYPE_TCP = 1,
53 FIO_TYPE_UDP = 2,
54 FIO_TYPE_UNIX = 3,
55};
56
57static int str_hostname_cb(void *data, const char *input);
58static struct fio_option options[] = {
59 {
60 .name = "hostname",
61 .type = FIO_OPT_STR_STORE,
62 .cb = str_hostname_cb,
63 .help = "Hostname for net IO engine",
64 },
65 {
66 .name = "port",
67 .type = FIO_OPT_INT,
68 .off1 = offsetof(struct netio_options, port),
69 .minval = 1,
70 .maxval = 65535,
71 .help = "Port to use for TCP or UDP net connections",
72 },
73 {
74 .name = "protocol",
75 .alias = "proto",
76 .type = FIO_OPT_STR,
77 .off1 = offsetof(struct netio_options, proto),
78 .help = "Network protocol to use",
79 .def = "tcp",
80 .posval = {
81 { .ival = "tcp",
82 .oval = FIO_TYPE_TCP,
83 .help = "Transmission Control Protocol",
84 },
85 { .ival = "udp",
86 .oval = FIO_TYPE_UDP,
87 .help = "User Datagram Protocol",
88 },
89 { .ival = "unix",
90 .oval = FIO_TYPE_UNIX,
91 .help = "UNIX domain socket",
92 },
93 },
94 },
95#ifdef CONFIG_TCP_NODELAY
96 {
97 .name = "nodelay",
98 .type = FIO_OPT_BOOL,
99 .off1 = offsetof(struct netio_options, nodelay),
100 .help = "Use TCP_NODELAY on TCP connections",
101 },
102#endif
103 {
104 .name = "listen",
105 .type = FIO_OPT_STR_SET,
106 .off1 = offsetof(struct netio_options, listen),
107 .help = "Listen for incoming TCP connections",
108 },
109 {
110 .name = "pingpong",
111 .type = FIO_OPT_STR_SET,
112 .off1 = offsetof(struct netio_options, pingpong),
113 .help = "Ping-pong IO requests",
114 },
115 {
116 .name = NULL,
117 },
118};
119
120/*
121 * Return -1 for error and 'nr events' for a positive number
122 * of events
123 */
124static int poll_wait(struct thread_data *td, int fd, short events)
125{
126 struct pollfd pfd;
127 int ret;
128
129 while (!td->terminate) {
130 pfd.fd = fd;
131 pfd.events = events;
132 ret = poll(&pfd, 1, -1);
133 if (ret < 0) {
134 if (errno == EINTR)
135 break;
136
137 td_verror(td, errno, "poll");
138 return -1;
139 } else if (!ret)
140 continue;
141
142 break;
143 }
144
145 if (pfd.revents & events)
146 return 1;
147
148 return -1;
149}
150
151static int fio_netio_prep(struct thread_data *td, struct io_u *io_u)
152{
153 struct netio_options *o = td->eo;
154
155 /*
156 * Make sure we don't see spurious reads to a receiver, and vice versa
157 */
158 if (o->proto == FIO_TYPE_TCP)
159 return 0;
160
161 if ((o->listen && io_u->ddir == DDIR_WRITE) ||
162 (!o->listen && io_u->ddir == DDIR_READ)) {
163 td_verror(td, EINVAL, "bad direction");
164 return 1;
165 }
166
167 return 0;
168}
169
170#ifdef CONFIG_LINUX_SPLICE
171static int splice_io_u(int fdin, int fdout, unsigned int len)
172{
173 int bytes = 0;
174
175 while (len) {
176 int ret = splice(fdin, NULL, fdout, NULL, len, 0);
177
178 if (ret < 0) {
179 if (!bytes)
180 bytes = ret;
181
182 break;
183 } else if (!ret)
184 break;
185
186 bytes += ret;
187 len -= ret;
188 }
189
190 return bytes;
191}
192
193/*
194 * Receive bytes from a socket and fill them into the internal pipe
195 */
196static int splice_in(struct thread_data *td, struct io_u *io_u)
197{
198 struct netio_data *nd = td->io_ops->data;
199
200 return splice_io_u(io_u->file->fd, nd->pipes[1], io_u->xfer_buflen);
201}
202
203/*
204 * Transmit 'len' bytes from the internal pipe
205 */
206static int splice_out(struct thread_data *td, struct io_u *io_u,
207 unsigned int len)
208{
209 struct netio_data *nd = td->io_ops->data;
210
211 return splice_io_u(nd->pipes[0], io_u->file->fd, len);
212}
213
214static int vmsplice_io_u(struct io_u *io_u, int fd, unsigned int len)
215{
216 struct iovec iov = {
217 .iov_base = io_u->xfer_buf,
218 .iov_len = len,
219 };
220 int bytes = 0;
221
222 while (iov.iov_len) {
223 int ret = vmsplice(fd, &iov, 1, SPLICE_F_MOVE);
224
225 if (ret < 0) {
226 if (!bytes)
227 bytes = ret;
228 break;
229 } else if (!ret)
230 break;
231
232 iov.iov_len -= ret;
233 iov.iov_base += ret;
234 bytes += ret;
235 }
236
237 return bytes;
238
239}
240
241/*
242 * vmsplice() pipe to io_u buffer
243 */
244static int vmsplice_io_u_out(struct thread_data *td, struct io_u *io_u,
245 unsigned int len)
246{
247 struct netio_data *nd = td->io_ops->data;
248
249 return vmsplice_io_u(io_u, nd->pipes[0], len);
250}
251
252/*
253 * vmsplice() io_u to pipe
254 */
255static int vmsplice_io_u_in(struct thread_data *td, struct io_u *io_u)
256{
257 struct netio_data *nd = td->io_ops->data;
258
259 return vmsplice_io_u(io_u, nd->pipes[1], io_u->xfer_buflen);
260}
261
262/*
263 * splice receive - transfer socket data into a pipe using splice, then map
264 * that pipe data into the io_u using vmsplice.
265 */
266static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u)
267{
268 int ret;
269
270 ret = splice_in(td, io_u);
271 if (ret > 0)
272 return vmsplice_io_u_out(td, io_u, ret);
273
274 return ret;
275}
276
277/*
278 * splice transmit - map data from the io_u into a pipe by using vmsplice,
279 * then transfer that pipe to a socket using splice.
280 */
281static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u)
282{
283 int ret;
284
285 ret = vmsplice_io_u_in(td, io_u);
286 if (ret > 0)
287 return splice_out(td, io_u, ret);
288
289 return ret;
290}
291#else
292static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u)
293{
294 errno = EOPNOTSUPP;
295 return -1;
296}
297
298static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u)
299{
300 errno = EOPNOTSUPP;
301 return -1;
302}
303#endif
304
305static int fio_netio_send(struct thread_data *td, struct io_u *io_u)
306{
307 struct netio_data *nd = td->io_ops->data;
308 struct netio_options *o = td->eo;
309 int ret, flags = 0;
310
311 do {
312 if (o->proto == FIO_TYPE_UDP) {
313 struct sockaddr *to = (struct sockaddr *) &nd->addr;
314
315 ret = sendto(io_u->file->fd, io_u->xfer_buf,
316 io_u->xfer_buflen, flags, to,
317 sizeof(*to));
318 } else {
319 /*
320 * if we are going to write more, set MSG_MORE
321 */
322#ifdef MSG_MORE
323 if ((td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen <
324 td->o.size) && !o->pingpong)
325 flags |= MSG_MORE;
326#endif
327 ret = send(io_u->file->fd, io_u->xfer_buf,
328 io_u->xfer_buflen, flags);
329 }
330 if (ret > 0)
331 break;
332
333 ret = poll_wait(td, io_u->file->fd, POLLOUT);
334 if (ret <= 0)
335 break;
336 } while (1);
337
338 return ret;
339}
340
341static int is_udp_close(struct io_u *io_u, int len)
342{
343 struct udp_close_msg *msg;
344
345 if (len != sizeof(struct udp_close_msg))
346 return 0;
347
348 msg = io_u->xfer_buf;
349 if (ntohl(msg->magic) != FIO_LINK_OPEN_CLOSE_MAGIC)
350 return 0;
351 if (ntohl(msg->cmd) != FIO_LINK_CLOSE)
352 return 0;
353
354 return 1;
355}
356
357static int fio_netio_recv(struct thread_data *td, struct io_u *io_u)
358{
359 struct netio_data *nd = td->io_ops->data;
360 struct netio_options *o = td->eo;
361 int ret, flags = 0;
362
363 do {
364 if (o->proto == FIO_TYPE_UDP) {
365 socklen_t len = sizeof(nd->addr);
366 struct sockaddr *from = (struct sockaddr *) &nd->addr;
367
368 ret = recvfrom(io_u->file->fd, io_u->xfer_buf,
369 io_u->xfer_buflen, flags, from, &len);
370 if (is_udp_close(io_u, ret)) {
371 td->done = 1;
372 return 0;
373 }
374 } else {
375 ret = recv(io_u->file->fd, io_u->xfer_buf,
376 io_u->xfer_buflen, flags);
377 }
378 if (ret > 0)
379 break;
380 else if (!ret && (flags & MSG_WAITALL))
381 break;
382
383 ret = poll_wait(td, io_u->file->fd, POLLIN);
384 if (ret <= 0)
385 break;
386 flags |= MSG_WAITALL;
387 } while (1);
388
389 return ret;
390}
391
392static int __fio_netio_queue(struct thread_data *td, struct io_u *io_u,
393 enum fio_ddir ddir)
394{
395 struct netio_data *nd = td->io_ops->data;
396 struct netio_options *o = td->eo;
397 int ret;
398
399 if (ddir == DDIR_WRITE) {
400 if (!nd->use_splice || o->proto == FIO_TYPE_UDP ||
401 o->proto == FIO_TYPE_UNIX)
402 ret = fio_netio_send(td, io_u);
403 else
404 ret = fio_netio_splice_out(td, io_u);
405 } else if (ddir == DDIR_READ) {
406 if (!nd->use_splice || o->proto == FIO_TYPE_UDP ||
407 o->proto == FIO_TYPE_UNIX)
408 ret = fio_netio_recv(td, io_u);
409 else
410 ret = fio_netio_splice_in(td, io_u);
411 } else
412 ret = 0; /* must be a SYNC */
413
414 if (ret != (int) io_u->xfer_buflen) {
415 if (ret >= 0) {
416 io_u->resid = io_u->xfer_buflen - ret;
417 io_u->error = 0;
418 return FIO_Q_COMPLETED;
419 } else {
420 int err = errno;
421
422 if (ddir == DDIR_WRITE && err == EMSGSIZE)
423 return FIO_Q_BUSY;
424
425 io_u->error = err;
426 }
427 }
428
429 if (io_u->error)
430 td_verror(td, io_u->error, "xfer");
431
432 return FIO_Q_COMPLETED;
433}
434
435static int fio_netio_queue(struct thread_data *td, struct io_u *io_u)
436{
437 struct netio_options *o = td->eo;
438 int ret;
439
440 fio_ro_check(td, io_u);
441
442 ret = __fio_netio_queue(td, io_u, io_u->ddir);
443 if (!o->pingpong || ret != FIO_Q_COMPLETED)
444 return ret;
445
446 /*
447 * For ping-pong mode, receive or send reply as needed
448 */
449 if (td_read(td) && io_u->ddir == DDIR_READ)
450 ret = __fio_netio_queue(td, io_u, DDIR_WRITE);
451 else if (td_write(td) && io_u->ddir == DDIR_WRITE)
452 ret = __fio_netio_queue(td, io_u, DDIR_READ);
453
454 return ret;
455}
456
457static int fio_netio_connect(struct thread_data *td, struct fio_file *f)
458{
459 struct netio_data *nd = td->io_ops->data;
460 struct netio_options *o = td->eo;
461 int type, domain;
462
463 if (o->proto == FIO_TYPE_TCP) {
464 domain = AF_INET;
465 type = SOCK_STREAM;
466 } else if (o->proto == FIO_TYPE_UDP) {
467 domain = AF_INET;
468 type = SOCK_DGRAM;
469 } else if (o->proto == FIO_TYPE_UNIX) {
470 domain = AF_UNIX;
471 type = SOCK_STREAM;
472 } else {
473 log_err("fio: bad network type %d\n", o->proto);
474 f->fd = -1;
475 return 1;
476 }
477
478 f->fd = socket(domain, type, 0);
479 if (f->fd < 0) {
480 td_verror(td, errno, "socket");
481 return 1;
482 }
483
484#ifdef CONFIG_TCP_NODELAY
485 if (o->nodelay && o->proto == FIO_TYPE_TCP) {
486 int optval = 1;
487
488 if (setsockopt(f->fd, IPPROTO_TCP, TCP_NODELAY, (void *) &optval, sizeof(int)) < 0) {
489 log_err("fio: cannot set TCP_NODELAY option on socket (%s), disable with 'nodelay=0'\n", strerror(errno));
490 return 1;
491 }
492 }
493#endif
494
495 if (o->proto == FIO_TYPE_UDP)
496 return 0;
497 else if (o->proto == FIO_TYPE_TCP) {
498 socklen_t len = sizeof(nd->addr);
499
500 if (connect(f->fd, (struct sockaddr *) &nd->addr, len) < 0) {
501 td_verror(td, errno, "connect");
502 close(f->fd);
503 return 1;
504 }
505 } else {
506 struct sockaddr_un *addr = &nd->addr_un;
507 socklen_t len;
508
509 len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
510
511 if (connect(f->fd, (struct sockaddr *) addr, len) < 0) {
512 td_verror(td, errno, "connect");
513 close(f->fd);
514 return 1;
515 }
516 }
517
518 return 0;
519}
520
521static int fio_netio_accept(struct thread_data *td, struct fio_file *f)
522{
523 struct netio_data *nd = td->io_ops->data;
524 struct netio_options *o = td->eo;
525 socklen_t socklen = sizeof(nd->addr);
526 int state;
527
528 if (o->proto == FIO_TYPE_UDP) {
529 f->fd = nd->listenfd;
530 return 0;
531 }
532
533 state = td->runstate;
534 td_set_runstate(td, TD_SETTING_UP);
535
536 log_info("fio: waiting for connection\n");
537
538 if (poll_wait(td, nd->listenfd, POLLIN) < 0)
539 goto err;
540
541 f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr, &socklen);
542 if (f->fd < 0) {
543 td_verror(td, errno, "accept");
544 goto err;
545 }
546
547#ifdef CONFIG_TCP_NODELAY
548 if (o->nodelay && o->proto == FIO_TYPE_TCP) {
549 int optval = 1;
550
551 if (setsockopt(f->fd, IPPROTO_TCP, TCP_NODELAY, (void *) &optval, sizeof(int)) < 0) {
552 log_err("fio: cannot set TCP_NODELAY option on socket (%s), disable with 'nodelay=0'\n", strerror(errno));
553 return 1;
554 }
555 }
556#endif
557
558 reset_all_stats(td);
559 td_set_runstate(td, state);
560 return 0;
561err:
562 td_set_runstate(td, state);
563 return 1;
564}
565
566static void fio_netio_udp_close(struct thread_data *td, struct fio_file *f)
567{
568 struct netio_data *nd = td->io_ops->data;
569 struct udp_close_msg msg;
570 struct sockaddr *to = (struct sockaddr *) &nd->addr;
571 int ret;
572
573 msg.magic = htonl(FIO_LINK_OPEN_CLOSE_MAGIC);
574 msg.cmd = htonl(FIO_LINK_CLOSE);
575
576 ret = sendto(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to,
577 sizeof(nd->addr));
578 if (ret < 0)
579 td_verror(td, errno, "sendto udp link close");
580}
581
582static int fio_netio_close_file(struct thread_data *td, struct fio_file *f)
583{
584 struct netio_options *o = td->eo;
585
586 /*
587 * If this is an UDP connection, notify the receiver that we are
588 * closing down the link
589 */
590 if (o->proto == FIO_TYPE_UDP)
591 fio_netio_udp_close(td, f);
592
593 return generic_close_file(td, f);
594}
595
596static int fio_netio_udp_recv_open(struct thread_data *td, struct fio_file *f)
597{
598 struct netio_data *nd = td->io_ops->data;
599 struct udp_close_msg msg;
600 struct sockaddr *to = (struct sockaddr *) &nd->addr;
601 socklen_t len = sizeof(nd->addr);
602 int ret;
603
604 ret = recvfrom(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, &len);
605 if (ret < 0) {
606 td_verror(td, errno, "sendto udp link open");
607 return ret;
608 }
609
610 if (ntohl(msg.magic) != FIO_LINK_OPEN_CLOSE_MAGIC ||
611 ntohl(msg.cmd) != FIO_LINK_OPEN) {
612 log_err("fio: bad udp open magic %x/%x\n", ntohl(msg.magic),
613 ntohl(msg.cmd));
614 return -1;
615 }
616
617 return 0;
618}
619
620static int fio_netio_udp_send_open(struct thread_data *td, struct fio_file *f)
621{
622 struct netio_data *nd = td->io_ops->data;
623 struct udp_close_msg msg;
624 struct sockaddr *to = (struct sockaddr *) &nd->addr;
625 int ret;
626
627 msg.magic = htonl(FIO_LINK_OPEN_CLOSE_MAGIC);
628 msg.cmd = htonl(FIO_LINK_OPEN);
629
630 ret = sendto(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to,
631 sizeof(nd->addr));
632 if (ret < 0) {
633 td_verror(td, errno, "sendto udp link open");
634 return ret;
635 }
636
637 return 0;
638}
639
640static int fio_netio_open_file(struct thread_data *td, struct fio_file *f)
641{
642 int ret;
643 struct netio_options *o = td->eo;
644
645 if (o->listen)
646 ret = fio_netio_accept(td, f);
647 else
648 ret = fio_netio_connect(td, f);
649
650 if (ret) {
651 f->fd = -1;
652 return ret;
653 }
654
655 if (o->proto == FIO_TYPE_UDP) {
656 if (td_write(td))
657 ret = fio_netio_udp_send_open(td, f);
658 else {
659 int state;
660
661 state = td->runstate;
662 td_set_runstate(td, TD_SETTING_UP);
663 ret = fio_netio_udp_recv_open(td, f);
664 td_set_runstate(td, state);
665 }
666 }
667
668 if (ret)
669 fio_netio_close_file(td, f);
670
671 return ret;
672}
673
674static int fio_netio_setup_connect_inet(struct thread_data *td,
675 const char *host, unsigned short port)
676{
677 struct netio_data *nd = td->io_ops->data;
678
679 if (!host) {
680 log_err("fio: connect with no host to connect to.\n");
681 if (td_read(td))
682 log_err("fio: did you forget to set 'listen'?\n");
683
684 td_verror(td, EINVAL, "no hostname= set");
685 return 1;
686 }
687
688 nd->addr.sin_family = AF_INET;
689 nd->addr.sin_port = htons(port);
690
691 if (inet_aton(host, &nd->addr.sin_addr) != 1) {
692 struct hostent *hent;
693
694 hent = gethostbyname(host);
695 if (!hent) {
696 td_verror(td, errno, "gethostbyname");
697 return 1;
698 }
699
700 memcpy(&nd->addr.sin_addr, hent->h_addr, 4);
701 }
702
703 return 0;
704}
705
706static int fio_netio_setup_connect_unix(struct thread_data *td,
707 const char *path)
708{
709 struct netio_data *nd = td->io_ops->data;
710 struct sockaddr_un *soun = &nd->addr_un;
711
712 soun->sun_family = AF_UNIX;
713 strcpy(soun->sun_path, path);
714 return 0;
715}
716
717static int fio_netio_setup_connect(struct thread_data *td)
718{
719 struct netio_options *o = td->eo;
720
721 if (o->proto == FIO_TYPE_UDP || o->proto == FIO_TYPE_TCP)
722 return fio_netio_setup_connect_inet(td, td->o.filename,o->port);
723 else
724 return fio_netio_setup_connect_unix(td, td->o.filename);
725}
726
727static int fio_netio_setup_listen_unix(struct thread_data *td, const char *path)
728{
729 struct netio_data *nd = td->io_ops->data;
730 struct sockaddr_un *addr = &nd->addr_un;
731 mode_t mode;
732 int len, fd;
733
734 fd = socket(AF_UNIX, SOCK_STREAM, 0);
735 if (fd < 0) {
736 log_err("fio: socket: %s\n", strerror(errno));
737 return -1;
738 }
739
740 mode = umask(000);
741
742 memset(addr, 0, sizeof(*addr));
743 addr->sun_family = AF_UNIX;
744 strcpy(addr->sun_path, path);
745 unlink(path);
746
747 len = sizeof(addr->sun_family) + strlen(path) + 1;
748
749 if (bind(fd, (struct sockaddr *) addr, len) < 0) {
750 log_err("fio: bind: %s\n", strerror(errno));
751 close(fd);
752 return -1;
753 }
754
755 umask(mode);
756 nd->listenfd = fd;
757 return 0;
758}
759
760static int fio_netio_setup_listen_inet(struct thread_data *td, short port)
761{
762 struct netio_data *nd = td->io_ops->data;
763 struct netio_options *o = td->eo;
764 int fd, opt, type;
765
766 if (o->proto == FIO_TYPE_TCP)
767 type = SOCK_STREAM;
768 else
769 type = SOCK_DGRAM;
770
771 fd = socket(AF_INET, type, 0);
772 if (fd < 0) {
773 td_verror(td, errno, "socket");
774 return 1;
775 }
776
777 opt = 1;
778 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *) &opt, sizeof(opt)) < 0) {
779 td_verror(td, errno, "setsockopt");
780 return 1;
781 }
782#ifdef SO_REUSEPORT
783 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *) &opt, sizeof(opt)) < 0) {
784 td_verror(td, errno, "setsockopt");
785 return 1;
786 }
787#endif
788
789 nd->addr.sin_family = AF_INET;
790 nd->addr.sin_addr.s_addr = htonl(INADDR_ANY);
791 nd->addr.sin_port = htons(port);
792
793 if (bind(fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) {
794 td_verror(td, errno, "bind");
795 return 1;
796 }
797
798 nd->listenfd = fd;
799 return 0;
800}
801
802static int fio_netio_setup_listen(struct thread_data *td)
803{
804 struct netio_data *nd = td->io_ops->data;
805 struct netio_options *o = td->eo;
806 int ret;
807
808 if (o->proto == FIO_TYPE_UDP || o->proto == FIO_TYPE_TCP)
809 ret = fio_netio_setup_listen_inet(td, o->port);
810 else
811 ret = fio_netio_setup_listen_unix(td, td->o.filename);
812
813 if (ret)
814 return ret;
815 if (o->proto == FIO_TYPE_UDP)
816 return 0;
817
818 if (listen(nd->listenfd, 10) < 0) {
819 td_verror(td, errno, "listen");
820 nd->listenfd = -1;
821 return 1;
822 }
823
824 return 0;
825}
826
827static int fio_netio_init(struct thread_data *td)
828{
829 struct netio_options *o = td->eo;
830 int ret;
831
832#ifdef WIN32
833 WSADATA wsd;
834 WSAStartup(MAKEWORD(2,2), &wsd);
835#endif
836
837 if (td_random(td)) {
838 log_err("fio: network IO can't be random\n");
839 return 1;
840 }
841
842 if (o->proto == FIO_TYPE_UNIX && o->port) {
843 log_err("fio: network IO port not valid with unix socket\n");
844 return 1;
845 } else if (o->proto != FIO_TYPE_UNIX && !o->port) {
846 log_err("fio: network IO requires port for tcp or udp\n");
847 return 1;
848 }
849
850 if (o->proto != FIO_TYPE_TCP) {
851 if (o->listen) {
852 log_err("fio: listen only valid for TCP proto IO\n");
853 return 1;
854 }
855 if (td_rw(td)) {
856 log_err("fio: datagram network connections must be"
857 " read OR write\n");
858 return 1;
859 }
860 if (o->proto == FIO_TYPE_UNIX && !td->o.filename) {
861 log_err("fio: UNIX sockets need host/filename\n");
862 return 1;
863 }
864 o->listen = td_read(td);
865 }
866
867 if (o->proto != FIO_TYPE_UNIX && o->listen && td->o.filename) {
868 log_err("fio: hostname not valid for inbound network IO\n");
869 return 1;
870 }
871
872 if (o->listen)
873 ret = fio_netio_setup_listen(td);
874 else
875 ret = fio_netio_setup_connect(td);
876
877 return ret;
878}
879
880static void fio_netio_cleanup(struct thread_data *td)
881{
882 struct netio_data *nd = td->io_ops->data;
883
884 if (nd) {
885 if (nd->listenfd != -1)
886 close(nd->listenfd);
887 if (nd->pipes[0] != -1)
888 close(nd->pipes[0]);
889 if (nd->pipes[1] != -1)
890 close(nd->pipes[1]);
891
892 free(nd);
893 }
894}
895
896static int fio_netio_setup(struct thread_data *td)
897{
898 struct netio_data *nd;
899
900 if (!td->files_index) {
901 add_file(td, td->o.filename ?: "net");
902 td->o.nr_files = td->o.nr_files ?: 1;
903 }
904
905 if (!td->io_ops->data) {
906 nd = malloc(sizeof(*nd));;
907
908 memset(nd, 0, sizeof(*nd));
909 nd->listenfd = -1;
910 nd->pipes[0] = nd->pipes[1] = -1;
911 td->io_ops->data = nd;
912 }
913
914 return 0;
915}
916
917static void fio_netio_terminate(struct thread_data *td)
918{
919 kill(td->pid, SIGUSR2);
920}
921
922#ifdef CONFIG_LINUX_SPLICE
923static int fio_netio_setup_splice(struct thread_data *td)
924{
925 struct netio_data *nd;
926
927 fio_netio_setup(td);
928
929 nd = td->io_ops->data;
930 if (nd) {
931 if (pipe(nd->pipes) < 0)
932 return 1;
933
934 nd->use_splice = 1;
935 return 0;
936 }
937
938 return 1;
939}
940
941static struct ioengine_ops ioengine_splice = {
942 .name = "netsplice",
943 .version = FIO_IOOPS_VERSION,
944 .prep = fio_netio_prep,
945 .queue = fio_netio_queue,
946 .setup = fio_netio_setup_splice,
947 .init = fio_netio_init,
948 .cleanup = fio_netio_cleanup,
949 .open_file = fio_netio_open_file,
950 .close_file = fio_netio_close_file,
951 .terminate = fio_netio_terminate,
952 .options = options,
953 .option_struct_size = sizeof(struct netio_options),
954 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
955 FIO_PIPEIO,
956};
957#endif
958
959static struct ioengine_ops ioengine_rw = {
960 .name = "net",
961 .version = FIO_IOOPS_VERSION,
962 .prep = fio_netio_prep,
963 .queue = fio_netio_queue,
964 .setup = fio_netio_setup,
965 .init = fio_netio_init,
966 .cleanup = fio_netio_cleanup,
967 .open_file = fio_netio_open_file,
968 .close_file = fio_netio_close_file,
969 .terminate = fio_netio_terminate,
970 .options = options,
971 .option_struct_size = sizeof(struct netio_options),
972 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
973 FIO_PIPEIO,
974};
975
976static int str_hostname_cb(void *data, const char *input)
977{
978 struct netio_options *o = data;
979
980 if (o->td->o.filename)
981 free(o->td->o.filename);
982 o->td->o.filename = strdup(input);
983 return 0;
984}
985
986static void fio_init fio_netio_register(void)
987{
988 register_ioengine(&ioengine_rw);
989#ifdef CONFIG_LINUX_SPLICE
990 register_ioengine(&ioengine_splice);
991#endif
992}
993
994static void fio_exit fio_netio_unregister(void)
995{
996 unregister_ioengine(&ioengine_rw);
997#ifdef CONFIG_LINUX_SPLICE
998 unregister_ioengine(&ioengine_splice);
999#endif
1000}
fio - Flexible IO Tester