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