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Commit | Line | Data |
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559607ea DB |
1 | /* |
2 | * QEMU I/O channels sockets driver | |
3 | * | |
4 | * Copyright (c) 2015 Red Hat, Inc. | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
559607ea DB |
18 | */ |
19 | ||
cae9fc56 | 20 | #include "qemu/osdep.h" |
a8d25326 | 21 | #include "qemu-common.h" |
da34e65c | 22 | #include "qapi/error.h" |
9af23989 | 23 | #include "qapi/qapi-visit-sockets.h" |
0b8fa32f | 24 | #include "qemu/module.h" |
559607ea DB |
25 | #include "io/channel-socket.h" |
26 | #include "io/channel-watch.h" | |
27 | #include "trace.h" | |
37f9e0a2 | 28 | #include "qapi/clone-visitor.h" |
559607ea DB |
29 | |
30 | #define SOCKET_MAX_FDS 16 | |
31 | ||
32 | SocketAddress * | |
33 | qio_channel_socket_get_local_address(QIOChannelSocket *ioc, | |
34 | Error **errp) | |
35 | { | |
36 | return socket_sockaddr_to_address(&ioc->localAddr, | |
37 | ioc->localAddrLen, | |
38 | errp); | |
39 | } | |
40 | ||
41 | SocketAddress * | |
42 | qio_channel_socket_get_remote_address(QIOChannelSocket *ioc, | |
43 | Error **errp) | |
44 | { | |
45 | return socket_sockaddr_to_address(&ioc->remoteAddr, | |
46 | ioc->remoteAddrLen, | |
47 | errp); | |
48 | } | |
49 | ||
50 | QIOChannelSocket * | |
51 | qio_channel_socket_new(void) | |
52 | { | |
53 | QIOChannelSocket *sioc; | |
54 | QIOChannel *ioc; | |
55 | ||
56 | sioc = QIO_CHANNEL_SOCKET(object_new(TYPE_QIO_CHANNEL_SOCKET)); | |
57 | sioc->fd = -1; | |
58 | ||
59 | ioc = QIO_CHANNEL(sioc); | |
d8d3c7cc | 60 | qio_channel_set_feature(ioc, QIO_CHANNEL_FEATURE_SHUTDOWN); |
559607ea | 61 | |
a5897205 PB |
62 | #ifdef WIN32 |
63 | ioc->event = CreateEvent(NULL, FALSE, FALSE, NULL); | |
64 | #endif | |
65 | ||
559607ea DB |
66 | trace_qio_channel_socket_new(sioc); |
67 | ||
68 | return sioc; | |
69 | } | |
70 | ||
71 | ||
72 | static int | |
73 | qio_channel_socket_set_fd(QIOChannelSocket *sioc, | |
74 | int fd, | |
75 | Error **errp) | |
76 | { | |
77 | if (sioc->fd != -1) { | |
78 | error_setg(errp, "Socket is already open"); | |
79 | return -1; | |
80 | } | |
81 | ||
82 | sioc->fd = fd; | |
83 | sioc->remoteAddrLen = sizeof(sioc->remoteAddr); | |
84 | sioc->localAddrLen = sizeof(sioc->localAddr); | |
85 | ||
86 | ||
87 | if (getpeername(fd, (struct sockaddr *)&sioc->remoteAddr, | |
88 | &sioc->remoteAddrLen) < 0) { | |
b16a44e1 | 89 | if (errno == ENOTCONN) { |
559607ea DB |
90 | memset(&sioc->remoteAddr, 0, sizeof(sioc->remoteAddr)); |
91 | sioc->remoteAddrLen = sizeof(sioc->remoteAddr); | |
92 | } else { | |
b16a44e1 | 93 | error_setg_errno(errp, errno, |
559607ea DB |
94 | "Unable to query remote socket address"); |
95 | goto error; | |
96 | } | |
97 | } | |
98 | ||
99 | if (getsockname(fd, (struct sockaddr *)&sioc->localAddr, | |
100 | &sioc->localAddrLen) < 0) { | |
b16a44e1 | 101 | error_setg_errno(errp, errno, |
559607ea DB |
102 | "Unable to query local socket address"); |
103 | goto error; | |
104 | } | |
105 | ||
106 | #ifndef WIN32 | |
107 | if (sioc->localAddr.ss_family == AF_UNIX) { | |
108 | QIOChannel *ioc = QIO_CHANNEL(sioc); | |
d8d3c7cc | 109 | qio_channel_set_feature(ioc, QIO_CHANNEL_FEATURE_FD_PASS); |
559607ea DB |
110 | } |
111 | #endif /* WIN32 */ | |
112 | ||
113 | return 0; | |
114 | ||
115 | error: | |
116 | sioc->fd = -1; /* Let the caller close FD on failure */ | |
117 | return -1; | |
118 | } | |
119 | ||
120 | QIOChannelSocket * | |
121 | qio_channel_socket_new_fd(int fd, | |
122 | Error **errp) | |
123 | { | |
124 | QIOChannelSocket *ioc; | |
125 | ||
126 | ioc = qio_channel_socket_new(); | |
127 | if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) { | |
128 | object_unref(OBJECT(ioc)); | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | trace_qio_channel_socket_new_fd(ioc, fd); | |
133 | ||
134 | return ioc; | |
135 | } | |
136 | ||
137 | ||
138 | int qio_channel_socket_connect_sync(QIOChannelSocket *ioc, | |
139 | SocketAddress *addr, | |
140 | Error **errp) | |
141 | { | |
142 | int fd; | |
143 | ||
144 | trace_qio_channel_socket_connect_sync(ioc, addr); | |
b2587932 | 145 | fd = socket_connect(addr, errp); |
559607ea DB |
146 | if (fd < 0) { |
147 | trace_qio_channel_socket_connect_fail(ioc); | |
148 | return -1; | |
149 | } | |
150 | ||
151 | trace_qio_channel_socket_connect_complete(ioc, fd); | |
152 | if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) { | |
153 | close(fd); | |
154 | return -1; | |
155 | } | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | ||
59de517d DB |
161 | static void qio_channel_socket_connect_worker(QIOTask *task, |
162 | gpointer opaque) | |
559607ea DB |
163 | { |
164 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); | |
165 | SocketAddress *addr = opaque; | |
59de517d | 166 | Error *err = NULL; |
559607ea | 167 | |
59de517d | 168 | qio_channel_socket_connect_sync(ioc, addr, &err); |
559607ea | 169 | |
59de517d | 170 | qio_task_set_error(task, err); |
559607ea DB |
171 | } |
172 | ||
173 | ||
174 | void qio_channel_socket_connect_async(QIOChannelSocket *ioc, | |
175 | SocketAddress *addr, | |
176 | QIOTaskFunc callback, | |
177 | gpointer opaque, | |
8005fdd8 PX |
178 | GDestroyNotify destroy, |
179 | GMainContext *context) | |
559607ea DB |
180 | { |
181 | QIOTask *task = qio_task_new( | |
182 | OBJECT(ioc), callback, opaque, destroy); | |
183 | SocketAddress *addrCopy; | |
184 | ||
37f9e0a2 | 185 | addrCopy = QAPI_CLONE(SocketAddress, addr); |
559607ea DB |
186 | |
187 | /* socket_connect() does a non-blocking connect(), but it | |
188 | * still blocks in DNS lookups, so we must use a thread */ | |
189 | trace_qio_channel_socket_connect_async(ioc, addr); | |
190 | qio_task_run_in_thread(task, | |
191 | qio_channel_socket_connect_worker, | |
192 | addrCopy, | |
a17536c5 | 193 | (GDestroyNotify)qapi_free_SocketAddress, |
8005fdd8 | 194 | context); |
559607ea DB |
195 | } |
196 | ||
197 | ||
198 | int qio_channel_socket_listen_sync(QIOChannelSocket *ioc, | |
199 | SocketAddress *addr, | |
4e2d8bf6 | 200 | int num, |
559607ea DB |
201 | Error **errp) |
202 | { | |
203 | int fd; | |
204 | ||
4e2d8bf6 JQ |
205 | trace_qio_channel_socket_listen_sync(ioc, addr, num); |
206 | fd = socket_listen(addr, num, errp); | |
559607ea DB |
207 | if (fd < 0) { |
208 | trace_qio_channel_socket_listen_fail(ioc); | |
209 | return -1; | |
210 | } | |
211 | ||
212 | trace_qio_channel_socket_listen_complete(ioc, fd); | |
213 | if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) { | |
214 | close(fd); | |
215 | return -1; | |
216 | } | |
bf535208 | 217 | qio_channel_set_feature(QIO_CHANNEL(ioc), QIO_CHANNEL_FEATURE_LISTEN); |
559607ea DB |
218 | |
219 | return 0; | |
220 | } | |
221 | ||
222 | ||
59de517d DB |
223 | static void qio_channel_socket_listen_worker(QIOTask *task, |
224 | gpointer opaque) | |
559607ea DB |
225 | { |
226 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); | |
227 | SocketAddress *addr = opaque; | |
59de517d | 228 | Error *err = NULL; |
559607ea | 229 | |
4e2d8bf6 | 230 | qio_channel_socket_listen_sync(ioc, addr, 1, &err); |
559607ea | 231 | |
59de517d | 232 | qio_task_set_error(task, err); |
559607ea DB |
233 | } |
234 | ||
235 | ||
236 | void qio_channel_socket_listen_async(QIOChannelSocket *ioc, | |
237 | SocketAddress *addr, | |
238 | QIOTaskFunc callback, | |
239 | gpointer opaque, | |
8005fdd8 PX |
240 | GDestroyNotify destroy, |
241 | GMainContext *context) | |
559607ea DB |
242 | { |
243 | QIOTask *task = qio_task_new( | |
244 | OBJECT(ioc), callback, opaque, destroy); | |
245 | SocketAddress *addrCopy; | |
246 | ||
37f9e0a2 | 247 | addrCopy = QAPI_CLONE(SocketAddress, addr); |
559607ea DB |
248 | |
249 | /* socket_listen() blocks in DNS lookups, so we must use a thread */ | |
250 | trace_qio_channel_socket_listen_async(ioc, addr); | |
251 | qio_task_run_in_thread(task, | |
252 | qio_channel_socket_listen_worker, | |
253 | addrCopy, | |
a17536c5 | 254 | (GDestroyNotify)qapi_free_SocketAddress, |
8005fdd8 | 255 | context); |
559607ea DB |
256 | } |
257 | ||
258 | ||
259 | int qio_channel_socket_dgram_sync(QIOChannelSocket *ioc, | |
260 | SocketAddress *localAddr, | |
261 | SocketAddress *remoteAddr, | |
262 | Error **errp) | |
263 | { | |
264 | int fd; | |
265 | ||
266 | trace_qio_channel_socket_dgram_sync(ioc, localAddr, remoteAddr); | |
150dcd1a | 267 | fd = socket_dgram(remoteAddr, localAddr, errp); |
559607ea DB |
268 | if (fd < 0) { |
269 | trace_qio_channel_socket_dgram_fail(ioc); | |
270 | return -1; | |
271 | } | |
272 | ||
273 | trace_qio_channel_socket_dgram_complete(ioc, fd); | |
274 | if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) { | |
275 | close(fd); | |
276 | return -1; | |
277 | } | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | ||
283 | struct QIOChannelSocketDGramWorkerData { | |
284 | SocketAddress *localAddr; | |
285 | SocketAddress *remoteAddr; | |
286 | }; | |
287 | ||
288 | ||
289 | static void qio_channel_socket_dgram_worker_free(gpointer opaque) | |
290 | { | |
291 | struct QIOChannelSocketDGramWorkerData *data = opaque; | |
292 | qapi_free_SocketAddress(data->localAddr); | |
293 | qapi_free_SocketAddress(data->remoteAddr); | |
294 | g_free(data); | |
295 | } | |
296 | ||
59de517d DB |
297 | static void qio_channel_socket_dgram_worker(QIOTask *task, |
298 | gpointer opaque) | |
559607ea DB |
299 | { |
300 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); | |
301 | struct QIOChannelSocketDGramWorkerData *data = opaque; | |
59de517d | 302 | Error *err = NULL; |
559607ea DB |
303 | |
304 | /* socket_dgram() blocks in DNS lookups, so we must use a thread */ | |
59de517d DB |
305 | qio_channel_socket_dgram_sync(ioc, data->localAddr, |
306 | data->remoteAddr, &err); | |
559607ea | 307 | |
59de517d | 308 | qio_task_set_error(task, err); |
559607ea DB |
309 | } |
310 | ||
311 | ||
312 | void qio_channel_socket_dgram_async(QIOChannelSocket *ioc, | |
313 | SocketAddress *localAddr, | |
314 | SocketAddress *remoteAddr, | |
315 | QIOTaskFunc callback, | |
316 | gpointer opaque, | |
8005fdd8 PX |
317 | GDestroyNotify destroy, |
318 | GMainContext *context) | |
559607ea DB |
319 | { |
320 | QIOTask *task = qio_task_new( | |
321 | OBJECT(ioc), callback, opaque, destroy); | |
322 | struct QIOChannelSocketDGramWorkerData *data = g_new0( | |
323 | struct QIOChannelSocketDGramWorkerData, 1); | |
324 | ||
37f9e0a2 EB |
325 | data->localAddr = QAPI_CLONE(SocketAddress, localAddr); |
326 | data->remoteAddr = QAPI_CLONE(SocketAddress, remoteAddr); | |
559607ea DB |
327 | |
328 | trace_qio_channel_socket_dgram_async(ioc, localAddr, remoteAddr); | |
329 | qio_task_run_in_thread(task, | |
330 | qio_channel_socket_dgram_worker, | |
331 | data, | |
a17536c5 | 332 | qio_channel_socket_dgram_worker_free, |
8005fdd8 | 333 | context); |
559607ea DB |
334 | } |
335 | ||
336 | ||
337 | QIOChannelSocket * | |
338 | qio_channel_socket_accept(QIOChannelSocket *ioc, | |
339 | Error **errp) | |
340 | { | |
341 | QIOChannelSocket *cioc; | |
342 | ||
0e5d6327 | 343 | cioc = qio_channel_socket_new(); |
559607ea DB |
344 | cioc->remoteAddrLen = sizeof(ioc->remoteAddr); |
345 | cioc->localAddrLen = sizeof(ioc->localAddr); | |
346 | ||
347 | retry: | |
348 | trace_qio_channel_socket_accept(ioc); | |
de7971ff DB |
349 | cioc->fd = qemu_accept(ioc->fd, (struct sockaddr *)&cioc->remoteAddr, |
350 | &cioc->remoteAddrLen); | |
559607ea | 351 | if (cioc->fd < 0) { |
b16a44e1 | 352 | if (errno == EINTR) { |
559607ea DB |
353 | goto retry; |
354 | } | |
8bd9c4e6 PX |
355 | error_setg_errno(errp, errno, "Unable to accept connection"); |
356 | trace_qio_channel_socket_accept_fail(ioc); | |
559607ea DB |
357 | goto error; |
358 | } | |
359 | ||
bead5994 DB |
360 | if (getsockname(cioc->fd, (struct sockaddr *)&cioc->localAddr, |
361 | &cioc->localAddrLen) < 0) { | |
b16a44e1 | 362 | error_setg_errno(errp, errno, |
559607ea DB |
363 | "Unable to query local socket address"); |
364 | goto error; | |
365 | } | |
366 | ||
bead5994 DB |
367 | #ifndef WIN32 |
368 | if (cioc->localAddr.ss_family == AF_UNIX) { | |
d8d3c7cc FF |
369 | QIOChannel *ioc_local = QIO_CHANNEL(cioc); |
370 | qio_channel_set_feature(ioc_local, QIO_CHANNEL_FEATURE_FD_PASS); | |
bead5994 DB |
371 | } |
372 | #endif /* WIN32 */ | |
373 | ||
559607ea DB |
374 | trace_qio_channel_socket_accept_complete(ioc, cioc, cioc->fd); |
375 | return cioc; | |
376 | ||
377 | error: | |
378 | object_unref(OBJECT(cioc)); | |
379 | return NULL; | |
380 | } | |
381 | ||
382 | static void qio_channel_socket_init(Object *obj) | |
383 | { | |
384 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj); | |
385 | ioc->fd = -1; | |
386 | } | |
387 | ||
388 | static void qio_channel_socket_finalize(Object *obj) | |
389 | { | |
390 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj); | |
74b6ce43 | 391 | |
559607ea | 392 | if (ioc->fd != -1) { |
e413ae0c FF |
393 | QIOChannel *ioc_local = QIO_CHANNEL(ioc); |
394 | if (qio_channel_has_feature(ioc_local, QIO_CHANNEL_FEATURE_LISTEN)) { | |
74b6ce43 MAL |
395 | Error *err = NULL; |
396 | ||
397 | socket_listen_cleanup(ioc->fd, &err); | |
398 | if (err) { | |
399 | error_report_err(err); | |
400 | err = NULL; | |
401 | } | |
402 | } | |
a5897205 PB |
403 | #ifdef WIN32 |
404 | WSAEventSelect(ioc->fd, NULL, 0); | |
405 | #endif | |
406 | closesocket(ioc->fd); | |
559607ea DB |
407 | ioc->fd = -1; |
408 | } | |
409 | } | |
410 | ||
411 | ||
412 | #ifndef WIN32 | |
413 | static void qio_channel_socket_copy_fds(struct msghdr *msg, | |
414 | int **fds, size_t *nfds) | |
415 | { | |
416 | struct cmsghdr *cmsg; | |
417 | ||
418 | *nfds = 0; | |
419 | *fds = NULL; | |
420 | ||
421 | for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) { | |
422 | int fd_size, i; | |
423 | int gotfds; | |
424 | ||
425 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) || | |
426 | cmsg->cmsg_level != SOL_SOCKET || | |
427 | cmsg->cmsg_type != SCM_RIGHTS) { | |
428 | continue; | |
429 | } | |
430 | ||
431 | fd_size = cmsg->cmsg_len - CMSG_LEN(0); | |
432 | ||
433 | if (!fd_size) { | |
434 | continue; | |
435 | } | |
436 | ||
437 | gotfds = fd_size / sizeof(int); | |
438 | *fds = g_renew(int, *fds, *nfds + gotfds); | |
439 | memcpy(*fds + *nfds, CMSG_DATA(cmsg), fd_size); | |
440 | ||
441 | for (i = 0; i < gotfds; i++) { | |
442 | int fd = (*fds)[*nfds + i]; | |
443 | if (fd < 0) { | |
444 | continue; | |
445 | } | |
446 | ||
447 | /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ | |
448 | qemu_set_block(fd); | |
449 | ||
450 | #ifndef MSG_CMSG_CLOEXEC | |
451 | qemu_set_cloexec(fd); | |
452 | #endif | |
453 | } | |
454 | *nfds += gotfds; | |
455 | } | |
456 | } | |
457 | ||
458 | ||
459 | static ssize_t qio_channel_socket_readv(QIOChannel *ioc, | |
460 | const struct iovec *iov, | |
461 | size_t niov, | |
462 | int **fds, | |
463 | size_t *nfds, | |
464 | Error **errp) | |
465 | { | |
466 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
467 | ssize_t ret; | |
468 | struct msghdr msg = { NULL, }; | |
469 | char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)]; | |
470 | int sflags = 0; | |
471 | ||
ccf1e2dc DB |
472 | memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)); |
473 | ||
559607ea DB |
474 | #ifdef MSG_CMSG_CLOEXEC |
475 | sflags |= MSG_CMSG_CLOEXEC; | |
476 | #endif | |
477 | ||
478 | msg.msg_iov = (struct iovec *)iov; | |
479 | msg.msg_iovlen = niov; | |
480 | if (fds && nfds) { | |
481 | msg.msg_control = control; | |
482 | msg.msg_controllen = sizeof(control); | |
483 | } | |
484 | ||
485 | retry: | |
486 | ret = recvmsg(sioc->fd, &msg, sflags); | |
487 | if (ret < 0) { | |
b16a44e1 | 488 | if (errno == EAGAIN) { |
559607ea DB |
489 | return QIO_CHANNEL_ERR_BLOCK; |
490 | } | |
b16a44e1 | 491 | if (errno == EINTR) { |
559607ea DB |
492 | goto retry; |
493 | } | |
494 | ||
b16a44e1 | 495 | error_setg_errno(errp, errno, |
559607ea DB |
496 | "Unable to read from socket"); |
497 | return -1; | |
498 | } | |
499 | ||
500 | if (fds && nfds) { | |
501 | qio_channel_socket_copy_fds(&msg, fds, nfds); | |
502 | } | |
503 | ||
504 | return ret; | |
505 | } | |
506 | ||
507 | static ssize_t qio_channel_socket_writev(QIOChannel *ioc, | |
508 | const struct iovec *iov, | |
509 | size_t niov, | |
510 | int *fds, | |
511 | size_t nfds, | |
512 | Error **errp) | |
513 | { | |
514 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
515 | ssize_t ret; | |
516 | struct msghdr msg = { NULL, }; | |
ccf1e2dc | 517 | char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)]; |
7b3c618a DB |
518 | size_t fdsize = sizeof(int) * nfds; |
519 | struct cmsghdr *cmsg; | |
559607ea | 520 | |
ccf1e2dc DB |
521 | memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)); |
522 | ||
559607ea DB |
523 | msg.msg_iov = (struct iovec *)iov; |
524 | msg.msg_iovlen = niov; | |
525 | ||
526 | if (nfds) { | |
559607ea | 527 | if (nfds > SOCKET_MAX_FDS) { |
cc75a50c | 528 | error_setg_errno(errp, EINVAL, |
559607ea DB |
529 | "Only %d FDs can be sent, got %zu", |
530 | SOCKET_MAX_FDS, nfds); | |
531 | return -1; | |
532 | } | |
533 | ||
534 | msg.msg_control = control; | |
535 | msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfds); | |
536 | ||
537 | cmsg = CMSG_FIRSTHDR(&msg); | |
538 | cmsg->cmsg_len = CMSG_LEN(fdsize); | |
539 | cmsg->cmsg_level = SOL_SOCKET; | |
540 | cmsg->cmsg_type = SCM_RIGHTS; | |
541 | memcpy(CMSG_DATA(cmsg), fds, fdsize); | |
542 | } | |
543 | ||
544 | retry: | |
545 | ret = sendmsg(sioc->fd, &msg, 0); | |
546 | if (ret <= 0) { | |
b16a44e1 | 547 | if (errno == EAGAIN) { |
559607ea DB |
548 | return QIO_CHANNEL_ERR_BLOCK; |
549 | } | |
b16a44e1 | 550 | if (errno == EINTR) { |
559607ea DB |
551 | goto retry; |
552 | } | |
b16a44e1 | 553 | error_setg_errno(errp, errno, |
559607ea DB |
554 | "Unable to write to socket"); |
555 | return -1; | |
556 | } | |
557 | return ret; | |
558 | } | |
559 | #else /* WIN32 */ | |
560 | static ssize_t qio_channel_socket_readv(QIOChannel *ioc, | |
561 | const struct iovec *iov, | |
562 | size_t niov, | |
563 | int **fds, | |
564 | size_t *nfds, | |
565 | Error **errp) | |
566 | { | |
567 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
568 | ssize_t done = 0; | |
569 | ssize_t i; | |
570 | ||
571 | for (i = 0; i < niov; i++) { | |
572 | ssize_t ret; | |
573 | retry: | |
574 | ret = recv(sioc->fd, | |
575 | iov[i].iov_base, | |
576 | iov[i].iov_len, | |
577 | 0); | |
578 | if (ret < 0) { | |
b16a44e1 | 579 | if (errno == EAGAIN) { |
559607ea DB |
580 | if (done) { |
581 | return done; | |
582 | } else { | |
583 | return QIO_CHANNEL_ERR_BLOCK; | |
584 | } | |
b16a44e1 | 585 | } else if (errno == EINTR) { |
559607ea DB |
586 | goto retry; |
587 | } else { | |
b16a44e1 | 588 | error_setg_errno(errp, errno, |
5151d23e | 589 | "Unable to read from socket"); |
559607ea DB |
590 | return -1; |
591 | } | |
592 | } | |
593 | done += ret; | |
594 | if (ret < iov[i].iov_len) { | |
595 | return done; | |
596 | } | |
597 | } | |
598 | ||
599 | return done; | |
600 | } | |
601 | ||
602 | static ssize_t qio_channel_socket_writev(QIOChannel *ioc, | |
603 | const struct iovec *iov, | |
604 | size_t niov, | |
605 | int *fds, | |
606 | size_t nfds, | |
607 | Error **errp) | |
608 | { | |
609 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
610 | ssize_t done = 0; | |
611 | ssize_t i; | |
612 | ||
613 | for (i = 0; i < niov; i++) { | |
614 | ssize_t ret; | |
615 | retry: | |
616 | ret = send(sioc->fd, | |
617 | iov[i].iov_base, | |
618 | iov[i].iov_len, | |
619 | 0); | |
620 | if (ret < 0) { | |
b16a44e1 | 621 | if (errno == EAGAIN) { |
559607ea DB |
622 | if (done) { |
623 | return done; | |
624 | } else { | |
625 | return QIO_CHANNEL_ERR_BLOCK; | |
626 | } | |
b16a44e1 | 627 | } else if (errno == EINTR) { |
559607ea DB |
628 | goto retry; |
629 | } else { | |
b16a44e1 | 630 | error_setg_errno(errp, errno, |
559607ea DB |
631 | "Unable to write to socket"); |
632 | return -1; | |
633 | } | |
634 | } | |
635 | done += ret; | |
636 | if (ret < iov[i].iov_len) { | |
637 | return done; | |
638 | } | |
639 | } | |
640 | ||
641 | return done; | |
642 | } | |
643 | #endif /* WIN32 */ | |
644 | ||
645 | static int | |
646 | qio_channel_socket_set_blocking(QIOChannel *ioc, | |
647 | bool enabled, | |
648 | Error **errp) | |
649 | { | |
650 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
651 | ||
652 | if (enabled) { | |
653 | qemu_set_block(sioc->fd); | |
654 | } else { | |
655 | qemu_set_nonblock(sioc->fd); | |
656 | } | |
657 | return 0; | |
658 | } | |
659 | ||
660 | ||
661 | static void | |
662 | qio_channel_socket_set_delay(QIOChannel *ioc, | |
663 | bool enabled) | |
664 | { | |
665 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
666 | int v = enabled ? 0 : 1; | |
667 | ||
668 | qemu_setsockopt(sioc->fd, | |
669 | IPPROTO_TCP, TCP_NODELAY, | |
670 | &v, sizeof(v)); | |
671 | } | |
672 | ||
673 | ||
674 | static void | |
675 | qio_channel_socket_set_cork(QIOChannel *ioc, | |
676 | bool enabled) | |
677 | { | |
678 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
679 | int v = enabled ? 1 : 0; | |
680 | ||
681 | socket_set_cork(sioc->fd, v); | |
682 | } | |
683 | ||
684 | ||
685 | static int | |
686 | qio_channel_socket_close(QIOChannel *ioc, | |
687 | Error **errp) | |
688 | { | |
689 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
d66f78e1 | 690 | int rc = 0; |
559607ea | 691 | |
a5897205 PB |
692 | if (sioc->fd != -1) { |
693 | #ifdef WIN32 | |
694 | WSAEventSelect(sioc->fd, NULL, 0); | |
695 | #endif | |
73564c40 DB |
696 | if (qio_channel_has_feature(ioc, QIO_CHANNEL_FEATURE_LISTEN)) { |
697 | socket_listen_cleanup(sioc->fd, errp); | |
698 | } | |
699 | ||
a5897205 PB |
700 | if (closesocket(sioc->fd) < 0) { |
701 | sioc->fd = -1; | |
b16a44e1 | 702 | error_setg_errno(errp, errno, |
a5897205 PB |
703 | "Unable to close socket"); |
704 | return -1; | |
705 | } | |
559607ea | 706 | sioc->fd = -1; |
559607ea | 707 | } |
d66f78e1 | 708 | return rc; |
559607ea DB |
709 | } |
710 | ||
711 | static int | |
712 | qio_channel_socket_shutdown(QIOChannel *ioc, | |
713 | QIOChannelShutdown how, | |
714 | Error **errp) | |
715 | { | |
716 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
717 | int sockhow; | |
718 | ||
719 | switch (how) { | |
720 | case QIO_CHANNEL_SHUTDOWN_READ: | |
721 | sockhow = SHUT_RD; | |
722 | break; | |
723 | case QIO_CHANNEL_SHUTDOWN_WRITE: | |
724 | sockhow = SHUT_WR; | |
725 | break; | |
726 | case QIO_CHANNEL_SHUTDOWN_BOTH: | |
727 | default: | |
728 | sockhow = SHUT_RDWR; | |
729 | break; | |
730 | } | |
731 | ||
732 | if (shutdown(sioc->fd, sockhow) < 0) { | |
b16a44e1 | 733 | error_setg_errno(errp, errno, |
559607ea DB |
734 | "Unable to shutdown socket"); |
735 | return -1; | |
736 | } | |
737 | return 0; | |
738 | } | |
739 | ||
bf88c124 PB |
740 | static void qio_channel_socket_set_aio_fd_handler(QIOChannel *ioc, |
741 | AioContext *ctx, | |
742 | IOHandler *io_read, | |
743 | IOHandler *io_write, | |
744 | void *opaque) | |
745 | { | |
746 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
747 | aio_set_fd_handler(ctx, sioc->fd, false, io_read, io_write, NULL, opaque); | |
748 | } | |
749 | ||
559607ea DB |
750 | static GSource *qio_channel_socket_create_watch(QIOChannel *ioc, |
751 | GIOCondition condition) | |
752 | { | |
753 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); | |
b83b68a0 PB |
754 | return qio_channel_create_socket_watch(ioc, |
755 | sioc->fd, | |
756 | condition); | |
559607ea DB |
757 | } |
758 | ||
759 | static void qio_channel_socket_class_init(ObjectClass *klass, | |
760 | void *class_data G_GNUC_UNUSED) | |
761 | { | |
762 | QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass); | |
763 | ||
764 | ioc_klass->io_writev = qio_channel_socket_writev; | |
765 | ioc_klass->io_readv = qio_channel_socket_readv; | |
766 | ioc_klass->io_set_blocking = qio_channel_socket_set_blocking; | |
767 | ioc_klass->io_close = qio_channel_socket_close; | |
768 | ioc_klass->io_shutdown = qio_channel_socket_shutdown; | |
769 | ioc_klass->io_set_cork = qio_channel_socket_set_cork; | |
770 | ioc_klass->io_set_delay = qio_channel_socket_set_delay; | |
771 | ioc_klass->io_create_watch = qio_channel_socket_create_watch; | |
bf88c124 | 772 | ioc_klass->io_set_aio_fd_handler = qio_channel_socket_set_aio_fd_handler; |
559607ea DB |
773 | } |
774 | ||
775 | static const TypeInfo qio_channel_socket_info = { | |
776 | .parent = TYPE_QIO_CHANNEL, | |
777 | .name = TYPE_QIO_CHANNEL_SOCKET, | |
778 | .instance_size = sizeof(QIOChannelSocket), | |
779 | .instance_init = qio_channel_socket_init, | |
780 | .instance_finalize = qio_channel_socket_finalize, | |
781 | .class_init = qio_channel_socket_class_init, | |
782 | }; | |
783 | ||
784 | static void qio_channel_socket_register_types(void) | |
785 | { | |
786 | type_register_static(&qio_channel_socket_info); | |
787 | } | |
788 | ||
789 | type_init(qio_channel_socket_register_types); |