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 #include "../verify.h"
25
26 struct netio_data {
27 int listenfd;
28 int use_splice;
29 int seq_off;
30 int pipes[2];
31 struct sockaddr_in addr;
32 struct sockaddr_in6 addr6;
33 struct sockaddr_un addr_un;
34 uint64_t udp_send_seq;
35 uint64_t udp_recv_seq;
36 };
37
38 struct netio_options {
39 struct thread_data *td;
40 unsigned int port;
41 unsigned int proto;
42 unsigned int listen;
43 unsigned int pingpong;
44 unsigned int nodelay;
45 unsigned int ttl;
46 unsigned int window_size;
47 unsigned int mss;
48 char *intfc;
49 };
50
51 struct udp_close_msg {
52 uint32_t magic;
53 uint32_t cmd;
54 };
55
56 struct udp_seq {
57 uint64_t magic;
58 uint64_t seq;
59 uint64_t bs;
60 };
61
62 enum {
63 FIO_LINK_CLOSE = 0x89,
64 FIO_LINK_OPEN_CLOSE_MAGIC = 0x6c696e6b,
65 FIO_LINK_OPEN = 0x98,
66 FIO_UDP_SEQ_MAGIC = 0x657375716e556563ULL,
67
68 FIO_TYPE_TCP = 1,
69 FIO_TYPE_UDP = 2,
70 FIO_TYPE_UNIX = 3,
71 FIO_TYPE_TCP_V6 = 4,
72 FIO_TYPE_UDP_V6 = 5,
73 };
74
75 static int str_hostname_cb(void *data, const char *input);
76 static struct fio_option options[] = {
77 {
78 .name = "hostname",
79 .lname = "net engine hostname",
80 .type = FIO_OPT_STR_STORE,
81 .cb = str_hostname_cb,
82 .help = "Hostname for net IO engine",
83 .category = FIO_OPT_C_ENGINE,
84 .group = FIO_OPT_G_NETIO,
85 },
86 {
87 .name = "port",
88 .lname = "net engine port",
89 .type = FIO_OPT_INT,
90 .off1 = offsetof(struct netio_options, port),
91 .minval = 1,
92 .maxval = 65535,
93 .help = "Port to use for TCP or UDP net connections",
94 .category = FIO_OPT_C_ENGINE,
95 .group = FIO_OPT_G_NETIO,
96 },
97 {
98 .name = "protocol",
99 .lname = "net engine protocol",
100 .alias = "proto",
101 .type = FIO_OPT_STR,
102 .off1 = offsetof(struct netio_options, proto),
103 .help = "Network protocol to use",
104 .def = "tcp",
105 .posval = {
106 { .ival = "tcp",
107 .oval = FIO_TYPE_TCP,
108 .help = "Transmission Control Protocol",
109 },
110 #ifdef CONFIG_IPV6
111 { .ival = "tcpv6",
112 .oval = FIO_TYPE_TCP_V6,
113 .help = "Transmission Control Protocol V6",
114 },
115 #endif
116 { .ival = "udp",
117 .oval = FIO_TYPE_UDP,
118 .help = "User Datagram Protocol",
119 },
120 #ifdef CONFIG_IPV6
121 { .ival = "udpv6",
122 .oval = FIO_TYPE_UDP_V6,
123 .help = "User Datagram Protocol V6",
124 },
125 #endif
126 { .ival = "unix",
127 .oval = FIO_TYPE_UNIX,
128 .help = "UNIX domain socket",
129 },
130 },
131 .category = FIO_OPT_C_ENGINE,
132 .group = FIO_OPT_G_NETIO,
133 },
134 #ifdef CONFIG_TCP_NODELAY
135 {
136 .name = "nodelay",
137 .type = FIO_OPT_BOOL,
138 .off1 = offsetof(struct netio_options, nodelay),
139 .help = "Use TCP_NODELAY on TCP connections",
140 .category = FIO_OPT_C_ENGINE,
141 .group = FIO_OPT_G_NETIO,
142 },
143 #endif
144 {
145 .name = "listen",
146 .lname = "net engine listen",
147 .type = FIO_OPT_STR_SET,
148 .off1 = offsetof(struct netio_options, listen),
149 .help = "Listen for incoming TCP connections",
150 .category = FIO_OPT_C_ENGINE,
151 .group = FIO_OPT_G_NETIO,
152 },
153 {
154 .name = "pingpong",
155 .type = FIO_OPT_STR_SET,
156 .off1 = offsetof(struct netio_options, pingpong),
157 .help = "Ping-pong IO requests",
158 .category = FIO_OPT_C_ENGINE,
159 .group = FIO_OPT_G_NETIO,
160 },
161 {
162 .name = "interface",
163 .lname = "net engine interface",
164 .type = FIO_OPT_STR_STORE,
165 .off1 = offsetof(struct netio_options, intfc),
166 .help = "Network interface to use",
167 .category = FIO_OPT_C_ENGINE,
168 .group = FIO_OPT_G_NETIO,
169 },
170 {
171 .name = "ttl",
172 .lname = "net engine multicast ttl",
173 .type = FIO_OPT_INT,
174 .off1 = offsetof(struct netio_options, ttl),
175 .def = "1",
176 .minval = 0,
177 .help = "Time-to-live value for outgoing UDP multicast packets",
178 .category = FIO_OPT_C_ENGINE,
179 .group = FIO_OPT_G_NETIO,
180 },
181 #ifdef CONFIG_NET_WINDOWSIZE
182 {
183 .name = "window_size",
184 .lname = "Window Size",
185 .type = FIO_OPT_INT,
186 .off1 = offsetof(struct netio_options, window_size),
187 .minval = 0,
188 .help = "Set socket buffer window size",
189 .category = FIO_OPT_C_ENGINE,
190 .group = FIO_OPT_G_NETIO,
191 },
192 #endif
193 #ifdef CONFIG_NET_MSS
194 {
195 .name = "mss",
196 .lname = "Maximum segment size",
197 .type = FIO_OPT_INT,
198 .off1 = offsetof(struct netio_options, mss),
199 .minval = 0,
200 .help = "Set TCP maximum segment size",
201 .category = FIO_OPT_C_ENGINE,
202 .group = FIO_OPT_G_NETIO,
203 },
204 #endif
205 {
206 .name = NULL,
207 },
208 };
209
is_udp(struct netio_options * o)210 static inline int is_udp(struct netio_options *o)
211 {
212 return o->proto == FIO_TYPE_UDP || o->proto == FIO_TYPE_UDP_V6;
213 }
214
is_tcp(struct netio_options * o)215 static inline int is_tcp(struct netio_options *o)
216 {
217 return o->proto == FIO_TYPE_TCP || o->proto == FIO_TYPE_TCP_V6;
218 }
219
is_ipv6(struct netio_options * o)220 static inline int is_ipv6(struct netio_options *o)
221 {
222 return o->proto == FIO_TYPE_UDP_V6 || o->proto == FIO_TYPE_TCP_V6;
223 }
224
set_window_size(struct thread_data * td,int fd)225 static int set_window_size(struct thread_data *td, int fd)
226 {
227 #ifdef CONFIG_NET_WINDOWSIZE
228 struct netio_options *o = td->eo;
229 unsigned int wss;
230 int snd, rcv, ret;
231
232 if (!o->window_size)
233 return 0;
234
235 rcv = o->listen || o->pingpong;
236 snd = !o->listen || o->pingpong;
237 wss = o->window_size;
238 ret = 0;
239
240 if (rcv) {
241 ret = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void *) &wss,
242 sizeof(wss));
243 if (ret < 0)
244 td_verror(td, errno, "rcvbuf window size");
245 }
246 if (snd && !ret) {
247 ret = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (void *) &wss,
248 sizeof(wss));
249 if (ret < 0)
250 td_verror(td, errno, "sndbuf window size");
251 }
252
253 return ret;
254 #else
255 td_verror(td, -EINVAL, "setsockopt window size");
256 return -1;
257 #endif
258 }
259
set_mss(struct thread_data * td,int fd)260 static int set_mss(struct thread_data *td, int fd)
261 {
262 #ifdef CONFIG_NET_MSS
263 struct netio_options *o = td->eo;
264 unsigned int mss;
265 int ret;
266
267 if (!o->mss || !is_tcp(o))
268 return 0;
269
270 mss = o->mss;
271 ret = setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, (void *) &mss,
272 sizeof(mss));
273 if (ret < 0)
274 td_verror(td, errno, "setsockopt TCP_MAXSEG");
275
276 return ret;
277 #else
278 td_verror(td, -EINVAL, "setsockopt TCP_MAXSEG");
279 return -1;
280 #endif
281 }
282
283
284 /*
285 * Return -1 for error and 'nr events' for a positive number
286 * of events
287 */
poll_wait(struct thread_data * td,int fd,short events)288 static int poll_wait(struct thread_data *td, int fd, short events)
289 {
290 struct pollfd pfd;
291 int ret;
292
293 while (!td->terminate) {
294 pfd.fd = fd;
295 pfd.events = events;
296 ret = poll(&pfd, 1, -1);
297 if (ret < 0) {
298 if (errno == EINTR)
299 break;
300
301 td_verror(td, errno, "poll");
302 return -1;
303 } else if (!ret)
304 continue;
305
306 break;
307 }
308
309 if (pfd.revents & events)
310 return 1;
311
312 return -1;
313 }
314
fio_netio_is_multicast(const char * mcaddr)315 static int fio_netio_is_multicast(const char *mcaddr)
316 {
317 in_addr_t addr = inet_network(mcaddr);
318 if (addr == -1)
319 return 0;
320
321 if (inet_network("224.0.0.0") <= addr &&
322 inet_network("239.255.255.255") >= addr)
323 return 1;
324
325 return 0;
326 }
327
328
fio_netio_prep(struct thread_data * td,struct io_u * io_u)329 static int fio_netio_prep(struct thread_data *td, struct io_u *io_u)
330 {
331 struct netio_options *o = td->eo;
332
333 /*
334 * Make sure we don't see spurious reads to a receiver, and vice versa
335 */
336 if (is_tcp(o))
337 return 0;
338
339 if ((o->listen && io_u->ddir == DDIR_WRITE) ||
340 (!o->listen && io_u->ddir == DDIR_READ)) {
341 td_verror(td, EINVAL, "bad direction");
342 return 1;
343 }
344
345 return 0;
346 }
347
348 #ifdef CONFIG_LINUX_SPLICE
splice_io_u(int fdin,int fdout,unsigned int len)349 static int splice_io_u(int fdin, int fdout, unsigned int len)
350 {
351 int bytes = 0;
352
353 while (len) {
354 int ret = splice(fdin, NULL, fdout, NULL, len, 0);
355
356 if (ret < 0) {
357 if (!bytes)
358 bytes = ret;
359
360 break;
361 } else if (!ret)
362 break;
363
364 bytes += ret;
365 len -= ret;
366 }
367
368 return bytes;
369 }
370
371 /*
372 * Receive bytes from a socket and fill them into the internal pipe
373 */
splice_in(struct thread_data * td,struct io_u * io_u)374 static int splice_in(struct thread_data *td, struct io_u *io_u)
375 {
376 struct netio_data *nd = td->io_ops->data;
377
378 return splice_io_u(io_u->file->fd, nd->pipes[1], io_u->xfer_buflen);
379 }
380
381 /*
382 * Transmit 'len' bytes from the internal pipe
383 */
splice_out(struct thread_data * td,struct io_u * io_u,unsigned int len)384 static int splice_out(struct thread_data *td, struct io_u *io_u,
385 unsigned int len)
386 {
387 struct netio_data *nd = td->io_ops->data;
388
389 return splice_io_u(nd->pipes[0], io_u->file->fd, len);
390 }
391
vmsplice_io_u(struct io_u * io_u,int fd,unsigned int len)392 static int vmsplice_io_u(struct io_u *io_u, int fd, unsigned int len)
393 {
394 struct iovec iov = {
395 .iov_base = io_u->xfer_buf,
396 .iov_len = len,
397 };
398 int bytes = 0;
399
400 while (iov.iov_len) {
401 int ret = vmsplice(fd, &iov, 1, SPLICE_F_MOVE);
402
403 if (ret < 0) {
404 if (!bytes)
405 bytes = ret;
406 break;
407 } else if (!ret)
408 break;
409
410 iov.iov_len -= ret;
411 iov.iov_base += ret;
412 bytes += ret;
413 }
414
415 return bytes;
416
417 }
418
419 /*
420 * vmsplice() pipe to io_u buffer
421 */
vmsplice_io_u_out(struct thread_data * td,struct io_u * io_u,unsigned int len)422 static int vmsplice_io_u_out(struct thread_data *td, struct io_u *io_u,
423 unsigned int len)
424 {
425 struct netio_data *nd = td->io_ops->data;
426
427 return vmsplice_io_u(io_u, nd->pipes[0], len);
428 }
429
430 /*
431 * vmsplice() io_u to pipe
432 */
vmsplice_io_u_in(struct thread_data * td,struct io_u * io_u)433 static int vmsplice_io_u_in(struct thread_data *td, struct io_u *io_u)
434 {
435 struct netio_data *nd = td->io_ops->data;
436
437 return vmsplice_io_u(io_u, nd->pipes[1], io_u->xfer_buflen);
438 }
439
440 /*
441 * splice receive - transfer socket data into a pipe using splice, then map
442 * that pipe data into the io_u using vmsplice.
443 */
fio_netio_splice_in(struct thread_data * td,struct io_u * io_u)444 static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u)
445 {
446 int ret;
447
448 ret = splice_in(td, io_u);
449 if (ret > 0)
450 return vmsplice_io_u_out(td, io_u, ret);
451
452 return ret;
453 }
454
455 /*
456 * splice transmit - map data from the io_u into a pipe by using vmsplice,
457 * then transfer that pipe to a socket using splice.
458 */
fio_netio_splice_out(struct thread_data * td,struct io_u * io_u)459 static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u)
460 {
461 int ret;
462
463 ret = vmsplice_io_u_in(td, io_u);
464 if (ret > 0)
465 return splice_out(td, io_u, ret);
466
467 return ret;
468 }
469 #else
fio_netio_splice_in(struct thread_data * td,struct io_u * io_u)470 static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u)
471 {
472 errno = EOPNOTSUPP;
473 return -1;
474 }
475
fio_netio_splice_out(struct thread_data * td,struct io_u * io_u)476 static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u)
477 {
478 errno = EOPNOTSUPP;
479 return -1;
480 }
481 #endif
482
store_udp_seq(struct netio_data * nd,struct io_u * io_u)483 static void store_udp_seq(struct netio_data *nd, struct io_u *io_u)
484 {
485 struct udp_seq *us;
486
487 if (io_u->xfer_buflen < sizeof(*us))
488 return;
489
490 us = io_u->xfer_buf + io_u->xfer_buflen - sizeof(*us);
491 us->magic = cpu_to_le64((uint64_t) FIO_UDP_SEQ_MAGIC);
492 us->bs = cpu_to_le64((uint64_t) io_u->xfer_buflen);
493 us->seq = cpu_to_le64(nd->udp_send_seq++);
494 }
495
verify_udp_seq(struct thread_data * td,struct netio_data * nd,struct io_u * io_u)496 static void verify_udp_seq(struct thread_data *td, struct netio_data *nd,
497 struct io_u *io_u)
498 {
499 struct udp_seq *us;
500 uint64_t seq;
501
502 if (io_u->xfer_buflen < sizeof(*us))
503 return;
504
505 if (nd->seq_off)
506 return;
507
508 us = io_u->xfer_buf + io_u->xfer_buflen - sizeof(*us);
509 if (le64_to_cpu(us->magic) != FIO_UDP_SEQ_MAGIC)
510 return;
511 if (le64_to_cpu(us->bs) != io_u->xfer_buflen) {
512 nd->seq_off = 1;
513 return;
514 }
515
516 seq = le64_to_cpu(us->seq);
517
518 if (seq != nd->udp_recv_seq)
519 td->ts.drop_io_u[io_u->ddir] += seq - nd->udp_recv_seq;
520
521 nd->udp_recv_seq = seq + 1;
522 }
523
fio_netio_send(struct thread_data * td,struct io_u * io_u)524 static int fio_netio_send(struct thread_data *td, struct io_u *io_u)
525 {
526 struct netio_data *nd = td->io_ops->data;
527 struct netio_options *o = td->eo;
528 int ret, flags = 0;
529
530 do {
531 if (is_udp(o)) {
532 const struct sockaddr *to;
533 socklen_t len;
534
535 if (is_ipv6(o)) {
536 to = (struct sockaddr *) &nd->addr6;
537 len = sizeof(nd->addr6);
538 } else {
539 to = (struct sockaddr *) &nd->addr;
540 len = sizeof(nd->addr);
541 }
542
543 if (td->o.verify == VERIFY_NONE)
544 store_udp_seq(nd, io_u);
545
546 ret = sendto(io_u->file->fd, io_u->xfer_buf,
547 io_u->xfer_buflen, flags, to, len);
548 } else {
549 /*
550 * if we are going to write more, set MSG_MORE
551 */
552 #ifdef MSG_MORE
553 if ((td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen <
554 td->o.size) && !o->pingpong)
555 flags |= MSG_MORE;
556 #endif
557 ret = send(io_u->file->fd, io_u->xfer_buf,
558 io_u->xfer_buflen, flags);
559 }
560 if (ret > 0)
561 break;
562
563 ret = poll_wait(td, io_u->file->fd, POLLOUT);
564 if (ret <= 0)
565 break;
566 } while (1);
567
568 return ret;
569 }
570
is_close_msg(struct io_u * io_u,int len)571 static int is_close_msg(struct io_u *io_u, int len)
572 {
573 struct udp_close_msg *msg;
574
575 if (len != sizeof(struct udp_close_msg))
576 return 0;
577
578 msg = io_u->xfer_buf;
579 if (le32_to_cpu(msg->magic) != FIO_LINK_OPEN_CLOSE_MAGIC)
580 return 0;
581 if (le32_to_cpu(msg->cmd) != FIO_LINK_CLOSE)
582 return 0;
583
584 return 1;
585 }
586
fio_netio_recv(struct thread_data * td,struct io_u * io_u)587 static int fio_netio_recv(struct thread_data *td, struct io_u *io_u)
588 {
589 struct netio_data *nd = td->io_ops->data;
590 struct netio_options *o = td->eo;
591 int ret, flags = 0;
592
593 do {
594 if (is_udp(o)) {
595 struct sockaddr *from;
596 socklen_t l, *len = &l;
597
598 if (o->listen) {
599 if (!is_ipv6(o)) {
600 from = (struct sockaddr *) &nd->addr;
601 *len = sizeof(nd->addr);
602 } else {
603 from = (struct sockaddr *) &nd->addr6;
604 *len = sizeof(nd->addr6);
605 }
606 } else {
607 from = NULL;
608 len = NULL;
609 }
610
611 ret = recvfrom(io_u->file->fd, io_u->xfer_buf,
612 io_u->xfer_buflen, flags, from, len);
613
614 if (is_close_msg(io_u, ret)) {
615 td->done = 1;
616 return 0;
617 }
618 } else {
619 ret = recv(io_u->file->fd, io_u->xfer_buf,
620 io_u->xfer_buflen, flags);
621
622 if (is_close_msg(io_u, ret)) {
623 td->done = 1;
624 return 0;
625 }
626 }
627 if (ret > 0)
628 break;
629 else if (!ret && (flags & MSG_WAITALL))
630 break;
631
632 ret = poll_wait(td, io_u->file->fd, POLLIN);
633 if (ret <= 0)
634 break;
635 flags |= MSG_WAITALL;
636 } while (1);
637
638 if (is_udp(o) && td->o.verify == VERIFY_NONE)
639 verify_udp_seq(td, nd, io_u);
640
641 return ret;
642 }
643
__fio_netio_queue(struct thread_data * td,struct io_u * io_u,enum fio_ddir ddir)644 static int __fio_netio_queue(struct thread_data *td, struct io_u *io_u,
645 enum fio_ddir ddir)
646 {
647 struct netio_data *nd = td->io_ops->data;
648 struct netio_options *o = td->eo;
649 int ret;
650
651 if (ddir == DDIR_WRITE) {
652 if (!nd->use_splice || is_udp(o) ||
653 o->proto == FIO_TYPE_UNIX)
654 ret = fio_netio_send(td, io_u);
655 else
656 ret = fio_netio_splice_out(td, io_u);
657 } else if (ddir == DDIR_READ) {
658 if (!nd->use_splice || is_udp(o) ||
659 o->proto == FIO_TYPE_UNIX)
660 ret = fio_netio_recv(td, io_u);
661 else
662 ret = fio_netio_splice_in(td, io_u);
663 } else
664 ret = 0; /* must be a SYNC */
665
666 if (ret != (int) io_u->xfer_buflen) {
667 if (ret > 0) {
668 io_u->resid = io_u->xfer_buflen - ret;
669 io_u->error = 0;
670 return FIO_Q_COMPLETED;
671 } else if (!ret)
672 return FIO_Q_BUSY;
673 else {
674 int err = errno;
675
676 if (ddir == DDIR_WRITE && err == EMSGSIZE)
677 return FIO_Q_BUSY;
678
679 io_u->error = err;
680 }
681 }
682
683 if (io_u->error)
684 td_verror(td, io_u->error, "xfer");
685
686 return FIO_Q_COMPLETED;
687 }
688
fio_netio_queue(struct thread_data * td,struct io_u * io_u)689 static int fio_netio_queue(struct thread_data *td, struct io_u *io_u)
690 {
691 struct netio_options *o = td->eo;
692 int ret;
693
694 fio_ro_check(td, io_u);
695
696 ret = __fio_netio_queue(td, io_u, io_u->ddir);
697 if (!o->pingpong || ret != FIO_Q_COMPLETED)
698 return ret;
699
700 /*
701 * For ping-pong mode, receive or send reply as needed
702 */
703 if (td_read(td) && io_u->ddir == DDIR_READ)
704 ret = __fio_netio_queue(td, io_u, DDIR_WRITE);
705 else if (td_write(td) && io_u->ddir == DDIR_WRITE)
706 ret = __fio_netio_queue(td, io_u, DDIR_READ);
707
708 return ret;
709 }
710
fio_netio_connect(struct thread_data * td,struct fio_file * f)711 static int fio_netio_connect(struct thread_data *td, struct fio_file *f)
712 {
713 struct netio_data *nd = td->io_ops->data;
714 struct netio_options *o = td->eo;
715 int type, domain;
716
717 if (o->proto == FIO_TYPE_TCP) {
718 domain = AF_INET;
719 type = SOCK_STREAM;
720 } else if (o->proto == FIO_TYPE_TCP_V6) {
721 domain = AF_INET6;
722 type = SOCK_STREAM;
723 } else if (o->proto == FIO_TYPE_UDP) {
724 domain = AF_INET;
725 type = SOCK_DGRAM;
726 } else if (o->proto == FIO_TYPE_UDP_V6) {
727 domain = AF_INET6;
728 type = SOCK_DGRAM;
729 } else if (o->proto == FIO_TYPE_UNIX) {
730 domain = AF_UNIX;
731 type = SOCK_STREAM;
732 } else {
733 log_err("fio: bad network type %d\n", o->proto);
734 f->fd = -1;
735 return 1;
736 }
737
738 f->fd = socket(domain, type, 0);
739 if (f->fd < 0) {
740 td_verror(td, errno, "socket");
741 return 1;
742 }
743
744 #ifdef CONFIG_TCP_NODELAY
745 if (o->nodelay && is_tcp(o)) {
746 int optval = 1;
747
748 if (setsockopt(f->fd, IPPROTO_TCP, TCP_NODELAY, (void *) &optval, sizeof(int)) < 0) {
749 log_err("fio: cannot set TCP_NODELAY option on socket (%s), disable with 'nodelay=0'\n", strerror(errno));
750 return 1;
751 }
752 }
753 #endif
754
755 if (set_window_size(td, f->fd)) {
756 close(f->fd);
757 return 1;
758 }
759 if (set_mss(td, f->fd)) {
760 close(f->fd);
761 return 1;
762 }
763
764 if (is_udp(o)) {
765 if (!fio_netio_is_multicast(td->o.filename))
766 return 0;
767 if (is_ipv6(o)) {
768 log_err("fio: multicast not supported on IPv6\n");
769 close(f->fd);
770 return 1;
771 }
772
773 if (o->intfc) {
774 struct in_addr interface_addr;
775
776 if (inet_aton(o->intfc, &interface_addr) == 0) {
777 log_err("fio: interface not valid interface IP\n");
778 close(f->fd);
779 return 1;
780 }
781 if (setsockopt(f->fd, IPPROTO_IP, IP_MULTICAST_IF, (const char*)&interface_addr, sizeof(interface_addr)) < 0) {
782 td_verror(td, errno, "setsockopt IP_MULTICAST_IF");
783 close(f->fd);
784 return 1;
785 }
786 }
787 if (setsockopt(f->fd, IPPROTO_IP, IP_MULTICAST_TTL, (const char*)&o->ttl, sizeof(o->ttl)) < 0) {
788 td_verror(td, errno, "setsockopt IP_MULTICAST_TTL");
789 close(f->fd);
790 return 1;
791 }
792 return 0;
793 } else if (o->proto == FIO_TYPE_TCP) {
794 socklen_t len = sizeof(nd->addr);
795
796 if (connect(f->fd, (struct sockaddr *) &nd->addr, len) < 0) {
797 td_verror(td, errno, "connect");
798 close(f->fd);
799 return 1;
800 }
801 } else if (o->proto == FIO_TYPE_TCP_V6) {
802 socklen_t len = sizeof(nd->addr6);
803
804 if (connect(f->fd, (struct sockaddr *) &nd->addr6, len) < 0) {
805 td_verror(td, errno, "connect");
806 close(f->fd);
807 return 1;
808 }
809
810 } else {
811 struct sockaddr_un *addr = &nd->addr_un;
812 socklen_t len;
813
814 len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
815
816 if (connect(f->fd, (struct sockaddr *) addr, len) < 0) {
817 td_verror(td, errno, "connect");
818 close(f->fd);
819 return 1;
820 }
821 }
822
823 return 0;
824 }
825
fio_netio_accept(struct thread_data * td,struct fio_file * f)826 static int fio_netio_accept(struct thread_data *td, struct fio_file *f)
827 {
828 struct netio_data *nd = td->io_ops->data;
829 struct netio_options *o = td->eo;
830 socklen_t socklen;
831 int state;
832
833 if (is_udp(o)) {
834 f->fd = nd->listenfd;
835 return 0;
836 }
837
838 state = td->runstate;
839 td_set_runstate(td, TD_SETTING_UP);
840
841 log_info("fio: waiting for connection\n");
842
843 if (poll_wait(td, nd->listenfd, POLLIN) < 0)
844 goto err;
845
846 if (o->proto == FIO_TYPE_TCP) {
847 socklen = sizeof(nd->addr);
848 f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr, &socklen);
849 } else {
850 socklen = sizeof(nd->addr6);
851 f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr6, &socklen);
852 }
853
854 if (f->fd < 0) {
855 td_verror(td, errno, "accept");
856 goto err;
857 }
858
859 #ifdef CONFIG_TCP_NODELAY
860 if (o->nodelay && is_tcp(o)) {
861 int optval = 1;
862
863 if (setsockopt(f->fd, IPPROTO_TCP, TCP_NODELAY, (void *) &optval, sizeof(int)) < 0) {
864 log_err("fio: cannot set TCP_NODELAY option on socket (%s), disable with 'nodelay=0'\n", strerror(errno));
865 return 1;
866 }
867 }
868 #endif
869
870 reset_all_stats(td);
871 td_set_runstate(td, state);
872 return 0;
873 err:
874 td_set_runstate(td, state);
875 return 1;
876 }
877
fio_netio_send_close(struct thread_data * td,struct fio_file * f)878 static void fio_netio_send_close(struct thread_data *td, struct fio_file *f)
879 {
880 struct netio_data *nd = td->io_ops->data;
881 struct netio_options *o = td->eo;
882 struct udp_close_msg msg;
883 struct sockaddr *to;
884 socklen_t len;
885 int ret;
886
887 if (is_ipv6(o)) {
888 to = (struct sockaddr *) &nd->addr6;
889 len = sizeof(nd->addr6);
890 } else {
891 to = (struct sockaddr *) &nd->addr;
892 len = sizeof(nd->addr);
893 }
894
895 msg.magic = cpu_to_le32((uint32_t) FIO_LINK_OPEN_CLOSE_MAGIC);
896 msg.cmd = cpu_to_le32((uint32_t) FIO_LINK_CLOSE);
897
898 ret = sendto(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, len);
899 if (ret < 0)
900 td_verror(td, errno, "sendto udp link close");
901 }
902
fio_netio_close_file(struct thread_data * td,struct fio_file * f)903 static int fio_netio_close_file(struct thread_data *td, struct fio_file *f)
904 {
905 /*
906 * Notify the receiver that we are closing down the link
907 */
908 fio_netio_send_close(td, f);
909
910 return generic_close_file(td, f);
911 }
912
fio_netio_udp_recv_open(struct thread_data * td,struct fio_file * f)913 static int fio_netio_udp_recv_open(struct thread_data *td, struct fio_file *f)
914 {
915 struct netio_data *nd = td->io_ops->data;
916 struct netio_options *o = td->eo;
917 struct udp_close_msg msg;
918 struct sockaddr *to;
919 socklen_t len;
920 int ret;
921
922 if (is_ipv6(o)) {
923 len = sizeof(nd->addr6);
924 to = (struct sockaddr *) &nd->addr6;
925 } else {
926 len = sizeof(nd->addr);
927 to = (struct sockaddr *) &nd->addr;
928 }
929
930 ret = recvfrom(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, &len);
931 if (ret < 0) {
932 td_verror(td, errno, "recvfrom udp link open");
933 return ret;
934 }
935
936 if (ntohl(msg.magic) != FIO_LINK_OPEN_CLOSE_MAGIC ||
937 ntohl(msg.cmd) != FIO_LINK_OPEN) {
938 log_err("fio: bad udp open magic %x/%x\n", ntohl(msg.magic),
939 ntohl(msg.cmd));
940 return -1;
941 }
942
943 fio_gettime(&td->start, NULL);
944 return 0;
945 }
946
fio_netio_send_open(struct thread_data * td,struct fio_file * f)947 static int fio_netio_send_open(struct thread_data *td, struct fio_file *f)
948 {
949 struct netio_data *nd = td->io_ops->data;
950 struct netio_options *o = td->eo;
951 struct udp_close_msg msg;
952 struct sockaddr *to;
953 socklen_t len;
954 int ret;
955
956 if (is_ipv6(o)) {
957 len = sizeof(nd->addr6);
958 to = (struct sockaddr *) &nd->addr6;
959 } else {
960 len = sizeof(nd->addr);
961 to = (struct sockaddr *) &nd->addr;
962 }
963
964 msg.magic = htonl(FIO_LINK_OPEN_CLOSE_MAGIC);
965 msg.cmd = htonl(FIO_LINK_OPEN);
966
967 ret = sendto(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, len);
968 if (ret < 0) {
969 td_verror(td, errno, "sendto udp link open");
970 return ret;
971 }
972
973 return 0;
974 }
975
fio_netio_open_file(struct thread_data * td,struct fio_file * f)976 static int fio_netio_open_file(struct thread_data *td, struct fio_file *f)
977 {
978 int ret;
979 struct netio_options *o = td->eo;
980
981 if (o->listen)
982 ret = fio_netio_accept(td, f);
983 else
984 ret = fio_netio_connect(td, f);
985
986 if (ret) {
987 f->fd = -1;
988 return ret;
989 }
990
991 if (is_udp(o)) {
992 if (td_write(td))
993 ret = fio_netio_send_open(td, f);
994 else {
995 int state;
996
997 state = td->runstate;
998 td_set_runstate(td, TD_SETTING_UP);
999 ret = fio_netio_udp_recv_open(td, f);
1000 td_set_runstate(td, state);
1001 }
1002 }
1003
1004 if (ret)
1005 fio_netio_close_file(td, f);
1006
1007 return ret;
1008 }
1009
fio_fill_addr(struct thread_data * td,const char * host,int af,void * dst,struct addrinfo ** res)1010 static int fio_fill_addr(struct thread_data *td, const char *host, int af,
1011 void *dst, struct addrinfo **res)
1012 {
1013 struct netio_options *o = td->eo;
1014 struct addrinfo hints;
1015 int ret;
1016
1017 if (inet_pton(af, host, dst))
1018 return 0;
1019
1020 memset(&hints, 0, sizeof(hints));
1021
1022 if (is_tcp(o))
1023 hints.ai_socktype = SOCK_STREAM;
1024 else
1025 hints.ai_socktype = SOCK_DGRAM;
1026
1027 if (is_ipv6(o))
1028 hints.ai_family = AF_INET6;
1029 else
1030 hints.ai_family = AF_INET;
1031
1032 ret = getaddrinfo(host, NULL, &hints, res);
1033 if (ret) {
1034 int e = EINVAL;
1035 char str[128];
1036
1037 if (ret == EAI_SYSTEM)
1038 e = errno;
1039
1040 snprintf(str, sizeof(str), "getaddrinfo: %s", gai_strerror(ret));
1041 td_verror(td, e, str);
1042 return 1;
1043 }
1044
1045 return 0;
1046 }
1047
fio_netio_setup_connect_inet(struct thread_data * td,const char * host,unsigned short port)1048 static int fio_netio_setup_connect_inet(struct thread_data *td,
1049 const char *host, unsigned short port)
1050 {
1051 struct netio_data *nd = td->io_ops->data;
1052 struct netio_options *o = td->eo;
1053 struct addrinfo *res = NULL;
1054 void *dst, *src;
1055 int af, len;
1056
1057 if (!host) {
1058 log_err("fio: connect with no host to connect to.\n");
1059 if (td_read(td))
1060 log_err("fio: did you forget to set 'listen'?\n");
1061
1062 td_verror(td, EINVAL, "no hostname= set");
1063 return 1;
1064 }
1065
1066 nd->addr.sin_family = AF_INET;
1067 nd->addr.sin_port = htons(port);
1068 nd->addr6.sin6_family = AF_INET6;
1069 nd->addr6.sin6_port = htons(port);
1070
1071 if (is_ipv6(o)) {
1072 af = AF_INET6;
1073 dst = &nd->addr6.sin6_addr;
1074 } else {
1075 af = AF_INET;
1076 dst = &nd->addr.sin_addr;
1077 }
1078
1079 if (fio_fill_addr(td, host, af, dst, &res))
1080 return 1;
1081
1082 if (!res)
1083 return 0;
1084
1085 if (is_ipv6(o)) {
1086 len = sizeof(nd->addr6.sin6_addr);
1087 src = &((struct sockaddr_in6 *) res->ai_addr)->sin6_addr;
1088 } else {
1089 len = sizeof(nd->addr.sin_addr);
1090 src = &((struct sockaddr_in *) res->ai_addr)->sin_addr;
1091 }
1092
1093 memcpy(dst, src, len);
1094 freeaddrinfo(res);
1095 return 0;
1096 }
1097
fio_netio_setup_connect_unix(struct thread_data * td,const char * path)1098 static int fio_netio_setup_connect_unix(struct thread_data *td,
1099 const char *path)
1100 {
1101 struct netio_data *nd = td->io_ops->data;
1102 struct sockaddr_un *soun = &nd->addr_un;
1103
1104 soun->sun_family = AF_UNIX;
1105 memset(soun->sun_path, 0, sizeof(soun->sun_path));
1106 strncpy(soun->sun_path, path, sizeof(soun->sun_path) - 1);
1107 return 0;
1108 }
1109
fio_netio_setup_connect(struct thread_data * td)1110 static int fio_netio_setup_connect(struct thread_data *td)
1111 {
1112 struct netio_options *o = td->eo;
1113
1114 if (is_udp(o) || is_tcp(o))
1115 return fio_netio_setup_connect_inet(td, td->o.filename,o->port);
1116 else
1117 return fio_netio_setup_connect_unix(td, td->o.filename);
1118 }
1119
fio_netio_setup_listen_unix(struct thread_data * td,const char * path)1120 static int fio_netio_setup_listen_unix(struct thread_data *td, const char *path)
1121 {
1122 struct netio_data *nd = td->io_ops->data;
1123 struct sockaddr_un *addr = &nd->addr_un;
1124 mode_t mode;
1125 int len, fd;
1126
1127 fd = socket(AF_UNIX, SOCK_STREAM, 0);
1128 if (fd < 0) {
1129 log_err("fio: socket: %s\n", strerror(errno));
1130 return -1;
1131 }
1132
1133 mode = umask(000);
1134
1135 memset(addr, 0, sizeof(*addr));
1136 addr->sun_family = AF_UNIX;
1137 strncpy(addr->sun_path, path, sizeof(addr->sun_path) - 1);
1138 unlink(path);
1139
1140 len = sizeof(addr->sun_family) + strlen(path) + 1;
1141
1142 if (bind(fd, (struct sockaddr *) addr, len) < 0) {
1143 log_err("fio: bind: %s\n", strerror(errno));
1144 close(fd);
1145 return -1;
1146 }
1147
1148 umask(mode);
1149 nd->listenfd = fd;
1150 return 0;
1151 }
1152
fio_netio_setup_listen_inet(struct thread_data * td,short port)1153 static int fio_netio_setup_listen_inet(struct thread_data *td, short port)
1154 {
1155 struct netio_data *nd = td->io_ops->data;
1156 struct netio_options *o = td->eo;
1157 struct ip_mreq mr;
1158 struct sockaddr_in sin;
1159 struct sockaddr *saddr;
1160 int fd, opt, type, domain;
1161 socklen_t len;
1162
1163 memset(&sin, 0, sizeof(sin));
1164
1165 if (o->proto == FIO_TYPE_TCP) {
1166 type = SOCK_STREAM;
1167 domain = AF_INET;
1168 } else if (o->proto == FIO_TYPE_TCP_V6) {
1169 type = SOCK_STREAM;
1170 domain = AF_INET6;
1171 } else if (o->proto == FIO_TYPE_UDP) {
1172 type = SOCK_DGRAM;
1173 domain = AF_INET;
1174 } else if (o->proto == FIO_TYPE_UDP_V6) {
1175 type = SOCK_DGRAM;
1176 domain = AF_INET6;
1177 } else {
1178 log_err("fio: unknown proto %d\n", o->proto);
1179 return 1;
1180 }
1181
1182 fd = socket(domain, type, 0);
1183 if (fd < 0) {
1184 td_verror(td, errno, "socket");
1185 return 1;
1186 }
1187
1188 opt = 1;
1189 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *) &opt, sizeof(opt)) < 0) {
1190 td_verror(td, errno, "setsockopt");
1191 close(fd);
1192 return 1;
1193 }
1194 #ifdef SO_REUSEPORT
1195 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *) &opt, sizeof(opt)) < 0) {
1196 td_verror(td, errno, "setsockopt");
1197 close(fd);
1198 return 1;
1199 }
1200 #endif
1201
1202 if (set_window_size(td, fd)) {
1203 close(fd);
1204 return 1;
1205 }
1206 if (set_mss(td, fd)) {
1207 close(fd);
1208 return 1;
1209 }
1210
1211 if (td->o.filename) {
1212 if (!is_udp(o) || !fio_netio_is_multicast(td->o.filename)) {
1213 log_err("fio: hostname not valid for non-multicast inbound network IO\n");
1214 close(fd);
1215 return 1;
1216 }
1217 if (is_ipv6(o)) {
1218 log_err("fio: IPv6 not supported for multicast network IO");
1219 close(fd);
1220 return 1;
1221 }
1222
1223 inet_aton(td->o.filename, &sin.sin_addr);
1224
1225 mr.imr_multiaddr = sin.sin_addr;
1226 if (o->intfc) {
1227 if (inet_aton(o->intfc, &mr.imr_interface) == 0) {
1228 log_err("fio: interface not valid interface IP\n");
1229 close(fd);
1230 return 1;
1231 }
1232 } else {
1233 mr.imr_interface.s_addr = htonl(INADDR_ANY);
1234 }
1235
1236 if (setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const char*)&mr, sizeof(mr)) < 0) {
1237 td_verror(td, errno, "setsockopt IP_ADD_MEMBERSHIP");
1238 close(fd);
1239 return 1;
1240 }
1241 }
1242
1243 if (!is_ipv6(o)) {
1244 saddr = (struct sockaddr *) &nd->addr;
1245 len = sizeof(nd->addr);
1246
1247 nd->addr.sin_family = AF_INET;
1248 nd->addr.sin_addr.s_addr = sin.sin_addr.s_addr ? sin.sin_addr.s_addr : htonl(INADDR_ANY);
1249 nd->addr.sin_port = htons(port);
1250 } else {
1251 saddr = (struct sockaddr *) &nd->addr6;
1252 len = sizeof(nd->addr6);
1253
1254 nd->addr6.sin6_family = AF_INET6;
1255 nd->addr6.sin6_addr = in6addr_any;
1256 nd->addr6.sin6_port = htons(port);
1257 }
1258
1259 if (bind(fd, saddr, len) < 0) {
1260 close(fd);
1261 td_verror(td, errno, "bind");
1262 return 1;
1263 }
1264
1265 nd->listenfd = fd;
1266 return 0;
1267 }
1268
fio_netio_setup_listen(struct thread_data * td)1269 static int fio_netio_setup_listen(struct thread_data *td)
1270 {
1271 struct netio_data *nd = td->io_ops->data;
1272 struct netio_options *o = td->eo;
1273 int ret;
1274
1275 if (is_udp(o) || is_tcp(o))
1276 ret = fio_netio_setup_listen_inet(td, o->port);
1277 else
1278 ret = fio_netio_setup_listen_unix(td, td->o.filename);
1279
1280 if (ret)
1281 return ret;
1282 if (is_udp(o))
1283 return 0;
1284
1285 if (listen(nd->listenfd, 10) < 0) {
1286 td_verror(td, errno, "listen");
1287 nd->listenfd = -1;
1288 return 1;
1289 }
1290
1291 return 0;
1292 }
1293
fio_netio_init(struct thread_data * td)1294 static int fio_netio_init(struct thread_data *td)
1295 {
1296 struct netio_options *o = td->eo;
1297 int ret;
1298
1299 #ifdef WIN32
1300 WSADATA wsd;
1301 WSAStartup(MAKEWORD(2,2), &wsd);
1302 #endif
1303
1304 if (td_random(td)) {
1305 log_err("fio: network IO can't be random\n");
1306 return 1;
1307 }
1308
1309 if (o->proto == FIO_TYPE_UNIX && o->port) {
1310 log_err("fio: network IO port not valid with unix socket\n");
1311 return 1;
1312 } else if (o->proto != FIO_TYPE_UNIX && !o->port) {
1313 log_err("fio: network IO requires port for tcp or udp\n");
1314 return 1;
1315 }
1316
1317 o->port += td->subjob_number;
1318
1319 if (!is_tcp(o)) {
1320 if (o->listen) {
1321 log_err("fio: listen only valid for TCP proto IO\n");
1322 return 1;
1323 }
1324 if (td_rw(td)) {
1325 log_err("fio: datagram network connections must be"
1326 " read OR write\n");
1327 return 1;
1328 }
1329 if (o->proto == FIO_TYPE_UNIX && !td->o.filename) {
1330 log_err("fio: UNIX sockets need host/filename\n");
1331 return 1;
1332 }
1333 o->listen = td_read(td);
1334 }
1335
1336 if (o->listen)
1337 ret = fio_netio_setup_listen(td);
1338 else
1339 ret = fio_netio_setup_connect(td);
1340
1341 return ret;
1342 }
1343
fio_netio_cleanup(struct thread_data * td)1344 static void fio_netio_cleanup(struct thread_data *td)
1345 {
1346 struct netio_data *nd = td->io_ops->data;
1347
1348 if (nd) {
1349 if (nd->listenfd != -1)
1350 close(nd->listenfd);
1351 if (nd->pipes[0] != -1)
1352 close(nd->pipes[0]);
1353 if (nd->pipes[1] != -1)
1354 close(nd->pipes[1]);
1355
1356 free(nd);
1357 }
1358 }
1359
fio_netio_setup(struct thread_data * td)1360 static int fio_netio_setup(struct thread_data *td)
1361 {
1362 struct netio_data *nd;
1363
1364 if (!td->files_index) {
1365 add_file(td, td->o.filename ?: "net", 0, 0);
1366 td->o.nr_files = td->o.nr_files ?: 1;
1367 td->o.open_files++;
1368 }
1369
1370 if (!td->io_ops->data) {
1371 nd = malloc(sizeof(*nd));;
1372
1373 memset(nd, 0, sizeof(*nd));
1374 nd->listenfd = -1;
1375 nd->pipes[0] = nd->pipes[1] = -1;
1376 td->io_ops->data = nd;
1377 }
1378
1379 return 0;
1380 }
1381
fio_netio_terminate(struct thread_data * td)1382 static void fio_netio_terminate(struct thread_data *td)
1383 {
1384 kill(td->pid, SIGTERM);
1385 }
1386
1387 #ifdef CONFIG_LINUX_SPLICE
fio_netio_setup_splice(struct thread_data * td)1388 static int fio_netio_setup_splice(struct thread_data *td)
1389 {
1390 struct netio_data *nd;
1391
1392 fio_netio_setup(td);
1393
1394 nd = td->io_ops->data;
1395 if (nd) {
1396 if (pipe(nd->pipes) < 0)
1397 return 1;
1398
1399 nd->use_splice = 1;
1400 return 0;
1401 }
1402
1403 return 1;
1404 }
1405
1406 static struct ioengine_ops ioengine_splice = {
1407 .name = "netsplice",
1408 .version = FIO_IOOPS_VERSION,
1409 .prep = fio_netio_prep,
1410 .queue = fio_netio_queue,
1411 .setup = fio_netio_setup_splice,
1412 .init = fio_netio_init,
1413 .cleanup = fio_netio_cleanup,
1414 .open_file = fio_netio_open_file,
1415 .close_file = fio_netio_close_file,
1416 .terminate = fio_netio_terminate,
1417 .options = options,
1418 .option_struct_size = sizeof(struct netio_options),
1419 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
1420 FIO_PIPEIO,
1421 };
1422 #endif
1423
1424 static struct ioengine_ops ioengine_rw = {
1425 .name = "net",
1426 .version = FIO_IOOPS_VERSION,
1427 .prep = fio_netio_prep,
1428 .queue = fio_netio_queue,
1429 .setup = fio_netio_setup,
1430 .init = fio_netio_init,
1431 .cleanup = fio_netio_cleanup,
1432 .open_file = fio_netio_open_file,
1433 .close_file = fio_netio_close_file,
1434 .terminate = fio_netio_terminate,
1435 .options = options,
1436 .option_struct_size = sizeof(struct netio_options),
1437 .flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
1438 FIO_PIPEIO | FIO_BIT_BASED,
1439 };
1440
str_hostname_cb(void * data,const char * input)1441 static int str_hostname_cb(void *data, const char *input)
1442 {
1443 struct netio_options *o = data;
1444
1445 if (o->td->o.filename)
1446 free(o->td->o.filename);
1447 o->td->o.filename = strdup(input);
1448 return 0;
1449 }
1450
fio_netio_register(void)1451 static void fio_init fio_netio_register(void)
1452 {
1453 register_ioengine(&ioengine_rw);
1454 #ifdef CONFIG_LINUX_SPLICE
1455 register_ioengine(&ioengine_splice);
1456 #endif
1457 }
1458
fio_netio_unregister(void)1459 static void fio_exit fio_netio_unregister(void)
1460 {
1461 unregister_ioengine(&ioengine_rw);
1462 #ifdef CONFIG_LINUX_SPLICE
1463 unregister_ioengine(&ioengine_splice);
1464 #endif
1465 }
1466