io/channel-socket.c

   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/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "qemu-common.h"
  22 #include "qapi/error.h"
  23 #include "qapi/qapi-visit-sockets.h"
  24 #include "qemu/module.h"
  25 #include "io/channel-socket.h"
  26 #include "io/channel-watch.h"
  27 #include "trace.h"
  28 #include "qapi/clone-visitor.h"
  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);
  60     qio_channel_set_feature(ioc, QIO_CHANNEL_FEATURE_SHUTDOWN);
  61
  62 #ifdef WIN32
  63     ioc->event = CreateEvent(NULL, FALSE, FALSE, NULL);
  64 #endif
  65
  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) {
  89         if (errno == ENOTCONN) {
  90             memset(&sioc->remoteAddr, 0, sizeof(sioc->remoteAddr));
  91             sioc->remoteAddrLen = sizeof(sioc->remoteAddr);
  92         } else {
  93             error_setg_errno(errp, errno,
  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) {
 101         error_setg_errno(errp, errno,
 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);
 109         qio_channel_set_feature(ioc, QIO_CHANNEL_FEATURE_FD_PASS);
 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);
 145     fd = socket_connect(addr, errp);
 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
 161 static void qio_channel_socket_connect_worker(QIOTask *task,
 162                                               gpointer opaque)
 163 {
 164     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
 165     SocketAddress *addr = opaque;
 166     Error *err = NULL;
 167
 168     qio_channel_socket_connect_sync(ioc, addr, &err);
 169
 170     qio_task_set_error(task, err);
 171 }
 172
 173
 174 void qio_channel_socket_connect_async(QIOChannelSocket *ioc,
 175                                       SocketAddress *addr,
 176                                       QIOTaskFunc callback,
 177                                       gpointer opaque,
 178                                       GDestroyNotify destroy,
 179                                       GMainContext *context)
 180 {
 181     QIOTask *task = qio_task_new(
 182         OBJECT(ioc), callback, opaque, destroy);
 183     SocketAddress *addrCopy;
 184
 185     addrCopy = QAPI_CLONE(SocketAddress, addr);
 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,
 193                            (GDestroyNotify)qapi_free_SocketAddress,
 194                            context);
 195 }
 196
 197
 198 int qio_channel_socket_listen_sync(QIOChannelSocket *ioc,
 199                                    SocketAddress *addr,
 200                                    Error **errp)
 201 {
 202     int fd;
 203
 204     trace_qio_channel_socket_listen_sync(ioc, addr);
 205     fd = socket_listen(addr, errp);
 206     if (fd < 0) {
 207         trace_qio_channel_socket_listen_fail(ioc);
 208         return -1;
 209     }
 210
 211     trace_qio_channel_socket_listen_complete(ioc, fd);
 212     if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
 213         close(fd);
 214         return -1;
 215     }
 216     qio_channel_set_feature(QIO_CHANNEL(ioc), QIO_CHANNEL_FEATURE_LISTEN);
 217
 218     return 0;
 219 }
 220
 221
 222 static void qio_channel_socket_listen_worker(QIOTask *task,
 223                                              gpointer opaque)
 224 {
 225     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
 226     SocketAddress *addr = opaque;
 227     Error *err = NULL;
 228
 229     qio_channel_socket_listen_sync(ioc, addr, &err);
 230
 231     qio_task_set_error(task, err);
 232 }
 233
 234
 235 void qio_channel_socket_listen_async(QIOChannelSocket *ioc,
 236                                      SocketAddress *addr,
 237                                      QIOTaskFunc callback,
 238                                      gpointer opaque,
 239                                      GDestroyNotify destroy,
 240                                      GMainContext *context)
 241 {
 242     QIOTask *task = qio_task_new(
 243         OBJECT(ioc), callback, opaque, destroy);
 244     SocketAddress *addrCopy;
 245
 246     addrCopy = QAPI_CLONE(SocketAddress, addr);
 247
 248     /* socket_listen() blocks in DNS lookups, so we must use a thread */
 249     trace_qio_channel_socket_listen_async(ioc, addr);
 250     qio_task_run_in_thread(task,
 251                            qio_channel_socket_listen_worker,
 252                            addrCopy,
 253                            (GDestroyNotify)qapi_free_SocketAddress,
 254                            context);
 255 }
 256
 257
 258 int qio_channel_socket_dgram_sync(QIOChannelSocket *ioc,
 259                                   SocketAddress *localAddr,
 260                                   SocketAddress *remoteAddr,
 261                                   Error **errp)
 262 {
 263     int fd;
 264
 265     trace_qio_channel_socket_dgram_sync(ioc, localAddr, remoteAddr);
 266     fd = socket_dgram(remoteAddr, localAddr, errp);
 267     if (fd < 0) {
 268         trace_qio_channel_socket_dgram_fail(ioc);
 269         return -1;
 270     }
 271
 272     trace_qio_channel_socket_dgram_complete(ioc, fd);
 273     if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
 274         close(fd);
 275         return -1;
 276     }
 277
 278     return 0;
 279 }
 280
 281
 282 struct QIOChannelSocketDGramWorkerData {
 283     SocketAddress *localAddr;
 284     SocketAddress *remoteAddr;
 285 };
 286
 287
 288 static void qio_channel_socket_dgram_worker_free(gpointer opaque)
 289 {
 290     struct QIOChannelSocketDGramWorkerData *data = opaque;
 291     qapi_free_SocketAddress(data->localAddr);
 292     qapi_free_SocketAddress(data->remoteAddr);
 293     g_free(data);
 294 }
 295
 296 static void qio_channel_socket_dgram_worker(QIOTask *task,
 297                                             gpointer opaque)
 298 {
 299     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
 300     struct QIOChannelSocketDGramWorkerData *data = opaque;
 301     Error *err = NULL;
 302
 303     /* socket_dgram() blocks in DNS lookups, so we must use a thread */
 304     qio_channel_socket_dgram_sync(ioc, data->localAddr,
 305                                   data->remoteAddr, &err);
 306
 307     qio_task_set_error(task, err);
 308 }
 309
 310
 311 void qio_channel_socket_dgram_async(QIOChannelSocket *ioc,
 312                                     SocketAddress *localAddr,
 313                                     SocketAddress *remoteAddr,
 314                                     QIOTaskFunc callback,
 315                                     gpointer opaque,
 316                                     GDestroyNotify destroy,
 317                                     GMainContext *context)
 318 {
 319     QIOTask *task = qio_task_new(
 320         OBJECT(ioc), callback, opaque, destroy);
 321     struct QIOChannelSocketDGramWorkerData *data = g_new0(
 322         struct QIOChannelSocketDGramWorkerData, 1);
 323
 324     data->localAddr = QAPI_CLONE(SocketAddress, localAddr);
 325     data->remoteAddr = QAPI_CLONE(SocketAddress, remoteAddr);
 326
 327     trace_qio_channel_socket_dgram_async(ioc, localAddr, remoteAddr);
 328     qio_task_run_in_thread(task,
 329                            qio_channel_socket_dgram_worker,
 330                            data,
 331                            qio_channel_socket_dgram_worker_free,
 332                            context);
 333 }
 334
 335
 336 QIOChannelSocket *
 337 qio_channel_socket_accept(QIOChannelSocket *ioc,
 338                           Error **errp)
 339 {
 340     QIOChannelSocket *cioc;
 341
 342     cioc = qio_channel_socket_new();
 343     cioc->remoteAddrLen = sizeof(ioc->remoteAddr);
 344     cioc->localAddrLen = sizeof(ioc->localAddr);
 345
 346  retry:
 347     trace_qio_channel_socket_accept(ioc);
 348     cioc->fd = qemu_accept(ioc->fd, (struct sockaddr *)&cioc->remoteAddr,
 349                            &cioc->remoteAddrLen);
 350     if (cioc->fd < 0) {
 351         if (errno == EINTR) {
 352             goto retry;
 353         }
 354         error_setg_errno(errp, errno, "Unable to accept connection");
 355         trace_qio_channel_socket_accept_fail(ioc);
 356         goto error;
 357     }
 358
 359     if (getsockname(cioc->fd, (struct sockaddr *)&cioc->localAddr,
 360                     &cioc->localAddrLen) < 0) {
 361         error_setg_errno(errp, errno,
 362                          "Unable to query local socket address");
 363         goto error;
 364     }
 365
 366 #ifndef WIN32
 367     if (cioc->localAddr.ss_family == AF_UNIX) {
 368         QIOChannel *ioc_local = QIO_CHANNEL(cioc);
 369         qio_channel_set_feature(ioc_local, QIO_CHANNEL_FEATURE_FD_PASS);
 370     }
 371 #endif /* WIN32 */
 372
 373     trace_qio_channel_socket_accept_complete(ioc, cioc, cioc->fd);
 374     return cioc;
 375
 376  error:
 377     object_unref(OBJECT(cioc));
 378     return NULL;
 379 }
 380
 381 static void qio_channel_socket_init(Object *obj)
 382 {
 383     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj);
 384     ioc->fd = -1;
 385 }
 386
 387 static void qio_channel_socket_finalize(Object *obj)
 388 {
 389     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj);
 390
 391     if (ioc->fd != -1) {
 392         QIOChannel *ioc_local = QIO_CHANNEL(ioc);
 393         if (qio_channel_has_feature(ioc_local, QIO_CHANNEL_FEATURE_LISTEN)) {
 394             Error *err = NULL;
 395
 396             socket_listen_cleanup(ioc->fd, &err);
 397             if (err) {
 398                 error_report_err(err);
 399                 err = NULL;
 400             }
 401         }
 402 #ifdef WIN32
 403         WSAEventSelect(ioc->fd, NULL, 0);
 404 #endif
 405         closesocket(ioc->fd);
 406         ioc->fd = -1;
 407     }
 408 }
 409
 410
 411 #ifndef WIN32
 412 static void qio_channel_socket_copy_fds(struct msghdr *msg,
 413                                         int **fds, size_t *nfds)
 414 {
 415     struct cmsghdr *cmsg;
 416
 417     *nfds = 0;
 418     *fds = NULL;
 419
 420     for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
 421         int fd_size, i;
 422         int gotfds;
 423
 424         if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
 425             cmsg->cmsg_level != SOL_SOCKET ||
 426             cmsg->cmsg_type != SCM_RIGHTS) {
 427             continue;
 428         }
 429
 430         fd_size = cmsg->cmsg_len - CMSG_LEN(0);
 431
 432         if (!fd_size) {
 433             continue;
 434         }
 435
 436         gotfds = fd_size / sizeof(int);
 437         *fds = g_renew(int, *fds, *nfds + gotfds);
 438         memcpy(*fds + *nfds, CMSG_DATA(cmsg), fd_size);
 439
 440         for (i = 0; i < gotfds; i++) {
 441             int fd = (*fds)[*nfds + i];
 442             if (fd < 0) {
 443                 continue;
 444             }
 445
 446             /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
 447             qemu_set_block(fd);
 448
 449 #ifndef MSG_CMSG_CLOEXEC
 450             qemu_set_cloexec(fd);
 451 #endif
 452         }
 453         *nfds += gotfds;
 454     }
 455 }
 456
 457
 458 static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
 459                                         const struct iovec *iov,
 460                                         size_t niov,
 461                                         int **fds,
 462                                         size_t *nfds,
 463                                         Error **errp)
 464 {
 465     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 466     ssize_t ret;
 467     struct msghdr msg = { NULL, };
 468     char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)];
 469     int sflags = 0;
 470
 471     memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS));
 472
 473 #ifdef MSG_CMSG_CLOEXEC
 474     sflags |= MSG_CMSG_CLOEXEC;
 475 #endif
 476
 477     msg.msg_iov = (struct iovec *)iov;
 478     msg.msg_iovlen = niov;
 479     if (fds && nfds) {
 480         msg.msg_control = control;
 481         msg.msg_controllen = sizeof(control);
 482     }
 483
 484  retry:
 485     ret = recvmsg(sioc->fd, &msg, sflags);
 486     if (ret < 0) {
 487         if (errno == EAGAIN) {
 488             return QIO_CHANNEL_ERR_BLOCK;
 489         }
 490         if (errno == EINTR) {
 491             goto retry;
 492         }
 493
 494         error_setg_errno(errp, errno,
 495                          "Unable to read from socket");
 496         return -1;
 497     }
 498
 499     if (fds && nfds) {
 500         qio_channel_socket_copy_fds(&msg, fds, nfds);
 501     }
 502
 503     return ret;
 504 }
 505
 506 static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
 507                                          const struct iovec *iov,
 508                                          size_t niov,
 509                                          int *fds,
 510                                          size_t nfds,
 511                                          Error **errp)
 512 {
 513     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 514     ssize_t ret;
 515     struct msghdr msg = { NULL, };
 516     char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)];
 517     size_t fdsize = sizeof(int) * nfds;
 518     struct cmsghdr *cmsg;
 519
 520     memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS));
 521
 522     msg.msg_iov = (struct iovec *)iov;
 523     msg.msg_iovlen = niov;
 524
 525     if (nfds) {
 526         if (nfds > SOCKET_MAX_FDS) {
 527             error_setg_errno(errp, EINVAL,
 528                              "Only %d FDs can be sent, got %zu",
 529                              SOCKET_MAX_FDS, nfds);
 530             return -1;
 531         }
 532
 533         msg.msg_control = control;
 534         msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfds);
 535
 536         cmsg = CMSG_FIRSTHDR(&msg);
 537         cmsg->cmsg_len = CMSG_LEN(fdsize);
 538         cmsg->cmsg_level = SOL_SOCKET;
 539         cmsg->cmsg_type = SCM_RIGHTS;
 540         memcpy(CMSG_DATA(cmsg), fds, fdsize);
 541     }
 542
 543  retry:
 544     ret = sendmsg(sioc->fd, &msg, 0);
 545     if (ret <= 0) {
 546         if (errno == EAGAIN) {
 547             return QIO_CHANNEL_ERR_BLOCK;
 548         }
 549         if (errno == EINTR) {
 550             goto retry;
 551         }
 552         error_setg_errno(errp, errno,
 553                          "Unable to write to socket");
 554         return -1;
 555     }
 556     return ret;
 557 }
 558 #else /* WIN32 */
 559 static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
 560                                         const struct iovec *iov,
 561                                         size_t niov,
 562                                         int **fds,
 563                                         size_t *nfds,
 564                                         Error **errp)
 565 {
 566     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 567     ssize_t done = 0;
 568     ssize_t i;
 569
 570     for (i = 0; i < niov; i++) {
 571         ssize_t ret;
 572     retry:
 573         ret = recv(sioc->fd,
 574                    iov[i].iov_base,
 575                    iov[i].iov_len,
 576                    0);
 577         if (ret < 0) {
 578             if (errno == EAGAIN) {
 579                 if (done) {
 580                     return done;
 581                 } else {
 582                     return QIO_CHANNEL_ERR_BLOCK;
 583                 }
 584             } else if (errno == EINTR) {
 585                 goto retry;
 586             } else {
 587                 error_setg_errno(errp, errno,
 588                                  "Unable to read from socket");
 589                 return -1;
 590             }
 591         }
 592         done += ret;
 593         if (ret < iov[i].iov_len) {
 594             return done;
 595         }
 596     }
 597
 598     return done;
 599 }
 600
 601 static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
 602                                          const struct iovec *iov,
 603                                          size_t niov,
 604                                          int *fds,
 605                                          size_t nfds,
 606                                          Error **errp)
 607 {
 608     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 609     ssize_t done = 0;
 610     ssize_t i;
 611
 612     for (i = 0; i < niov; i++) {
 613         ssize_t ret;
 614     retry:
 615         ret = send(sioc->fd,
 616                    iov[i].iov_base,
 617                    iov[i].iov_len,
 618                    0);
 619         if (ret < 0) {
 620             if (errno == EAGAIN) {
 621                 if (done) {
 622                     return done;
 623                 } else {
 624                     return QIO_CHANNEL_ERR_BLOCK;
 625                 }
 626             } else if (errno == EINTR) {
 627                 goto retry;
 628             } else {
 629                 error_setg_errno(errp, errno,
 630                                  "Unable to write to socket");
 631                 return -1;
 632             }
 633         }
 634         done += ret;
 635         if (ret < iov[i].iov_len) {
 636             return done;
 637         }
 638     }
 639
 640     return done;
 641 }
 642 #endif /* WIN32 */
 643
 644 static int
 645 qio_channel_socket_set_blocking(QIOChannel *ioc,
 646                                 bool enabled,
 647                                 Error **errp)
 648 {
 649     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 650
 651     if (enabled) {
 652         qemu_set_block(sioc->fd);
 653     } else {
 654         qemu_set_nonblock(sioc->fd);
 655     }
 656     return 0;
 657 }
 658
 659
 660 static void
 661 qio_channel_socket_set_delay(QIOChannel *ioc,
 662                              bool enabled)
 663 {
 664     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 665     int v = enabled ? 0 : 1;
 666
 667     qemu_setsockopt(sioc->fd,
 668                     IPPROTO_TCP, TCP_NODELAY,
 669                     &v, sizeof(v));
 670 }
 671
 672
 673 static void
 674 qio_channel_socket_set_cork(QIOChannel *ioc,
 675                             bool enabled)
 676 {
 677     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 678     int v = enabled ? 1 : 0;
 679
 680     socket_set_cork(sioc->fd, v);
 681 }
 682
 683
 684 static int
 685 qio_channel_socket_close(QIOChannel *ioc,
 686                          Error **errp)
 687 {
 688     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 689     int rc = 0;
 690
 691     if (sioc->fd != -1) {
 692 #ifdef WIN32
 693         WSAEventSelect(sioc->fd, NULL, 0);
 694 #endif
 695         if (qio_channel_has_feature(ioc, QIO_CHANNEL_FEATURE_LISTEN)) {
 696             socket_listen_cleanup(sioc->fd, errp);
 697         }
 698
 699         if (closesocket(sioc->fd) < 0) {
 700             sioc->fd = -1;
 701             error_setg_errno(errp, errno,
 702                              "Unable to close socket");
 703             return -1;
 704         }
 705         sioc->fd = -1;
 706     }
 707     return rc;
 708 }
 709
 710 static int
 711 qio_channel_socket_shutdown(QIOChannel *ioc,
 712                             QIOChannelShutdown how,
 713                             Error **errp)
 714 {
 715     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 716     int sockhow;
 717
 718     switch (how) {
 719     case QIO_CHANNEL_SHUTDOWN_READ:
 720         sockhow = SHUT_RD;
 721         break;
 722     case QIO_CHANNEL_SHUTDOWN_WRITE:
 723         sockhow = SHUT_WR;
 724         break;
 725     case QIO_CHANNEL_SHUTDOWN_BOTH:
 726     default:
 727         sockhow = SHUT_RDWR;
 728         break;
 729     }
 730
 731     if (shutdown(sioc->fd, sockhow) < 0) {
 732         error_setg_errno(errp, errno,
 733                          "Unable to shutdown socket");
 734         return -1;
 735     }
 736     return 0;
 737 }
 738
 739 static void qio_channel_socket_set_aio_fd_handler(QIOChannel *ioc,
 740                                                   AioContext *ctx,
 741                                                   IOHandler *io_read,
 742                                                   IOHandler *io_write,
 743                                                   void *opaque)
 744 {
 745     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 746     aio_set_fd_handler(ctx, sioc->fd, false, io_read, io_write, NULL, opaque);
 747 }
 748
 749 static GSource *qio_channel_socket_create_watch(QIOChannel *ioc,
 750                                                 GIOCondition condition)
 751 {
 752     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 753     return qio_channel_create_socket_watch(ioc,
 754                                            sioc->fd,
 755                                            condition);
 756 }
 757
 758 static void qio_channel_socket_class_init(ObjectClass *klass,
 759                                           void *class_data G_GNUC_UNUSED)
 760 {
 761     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 762
 763     ioc_klass->io_writev = qio_channel_socket_writev;
 764     ioc_klass->io_readv = qio_channel_socket_readv;
 765     ioc_klass->io_set_blocking = qio_channel_socket_set_blocking;
 766     ioc_klass->io_close = qio_channel_socket_close;
 767     ioc_klass->io_shutdown = qio_channel_socket_shutdown;
 768     ioc_klass->io_set_cork = qio_channel_socket_set_cork;
 769     ioc_klass->io_set_delay = qio_channel_socket_set_delay;
 770     ioc_klass->io_create_watch = qio_channel_socket_create_watch;
 771     ioc_klass->io_set_aio_fd_handler = qio_channel_socket_set_aio_fd_handler;
 772 }
 773
 774 static const TypeInfo qio_channel_socket_info = {
 775     .parent = TYPE_QIO_CHANNEL,
 776     .name = TYPE_QIO_CHANNEL_SOCKET,
 777     .instance_size = sizeof(QIOChannelSocket),
 778     .instance_init = qio_channel_socket_init,
 779     .instance_finalize = qio_channel_socket_finalize,
 780     .class_init = qio_channel_socket_class_init,
 781 };
 782
 783 static void qio_channel_socket_register_types(void)
 784 {
 785     type_register_static(&qio_channel_socket_info);
 786 }
 787
 788 type_init(qio_channel_socket_register_types);