util/oslib-win32.c

   1 /*
   2  * os-win32.c
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2010-2016 Red Hat, Inc.
   6  *
   7  * QEMU library functions for win32 which are shared between QEMU and
   8  * the QEMU tools.
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26  * THE SOFTWARE.
  27  *
  28  * The implementation of g_poll (functions poll_rest, g_poll) at the end of
  29  * this file are based on code from GNOME glib-2 and use a different license,
  30  * see the license comment there.
  31  */
  32
  33 #include "qemu/osdep.h"
  34 #include <windows.h>
  35 #include "qapi/error.h"
  36 #include "qemu/main-loop.h"
  37 #include "trace.h"
  38 #include "qemu/sockets.h"
  39 #include "qemu/cutils.h"
  40 #include "qemu/error-report.h"
  41 #include <malloc.h>
  42
  43 static int get_allocation_granularity(void)
  44 {
  45     SYSTEM_INFO system_info;
  46
  47     GetSystemInfo(&system_info);
  48     return system_info.dwAllocationGranularity;
  49 }
  50
  51 void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared,
  52                           bool noreserve)
  53 {
  54     void *ptr;
  55
  56     if (noreserve) {
  57         /*
  58          * We need a MEM_COMMIT before accessing any memory in a MEM_RESERVE
  59          * area; we cannot easily mimic POSIX MAP_NORESERVE semantics.
  60          */
  61         error_report("Skipping reservation of swap space is not supported.");
  62         return NULL;
  63     }
  64
  65     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  66     trace_qemu_anon_ram_alloc(size, ptr);
  67
  68     if (ptr && align) {
  69         *align = MAX(get_allocation_granularity(), getpagesize());
  70     }
  71     return ptr;
  72 }
  73
  74 void qemu_anon_ram_free(void *ptr, size_t size)
  75 {
  76     trace_qemu_anon_ram_free(ptr, size);
  77     if (ptr) {
  78         VirtualFree(ptr, 0, MEM_RELEASE);
  79     }
  80 }
  81
  82 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS
  83 /* FIXME: add proper locking */
  84 struct tm *gmtime_r(const time_t *timep, struct tm *result)
  85 {
  86     struct tm *p = gmtime(timep);
  87     memset(result, 0, sizeof(*result));
  88     if (p) {
  89         *result = *p;
  90         p = result;
  91     }
  92     return p;
  93 }
  94
  95 /* FIXME: add proper locking */
  96 struct tm *localtime_r(const time_t *timep, struct tm *result)
  97 {
  98     struct tm *p = localtime(timep);
  99     memset(result, 0, sizeof(*result));
 100     if (p) {
 101         *result = *p;
 102         p = result;
 103     }
 104     return p;
 105 }
 106 #endif /* _POSIX_THREAD_SAFE_FUNCTIONS */
 107
 108 static int socket_error(void)
 109 {
 110     switch (WSAGetLastError()) {
 111     case 0:
 112         return 0;
 113     case WSAEINTR:
 114         return EINTR;
 115     case WSAEINVAL:
 116         return EINVAL;
 117     case WSA_INVALID_HANDLE:
 118         return EBADF;
 119     case WSA_NOT_ENOUGH_MEMORY:
 120         return ENOMEM;
 121     case WSA_INVALID_PARAMETER:
 122         return EINVAL;
 123     case WSAENAMETOOLONG:
 124         return ENAMETOOLONG;
 125     case WSAENOTEMPTY:
 126         return ENOTEMPTY;
 127     case WSAEWOULDBLOCK:
 128          /* not using EWOULDBLOCK as we don't want code to have
 129           * to check both EWOULDBLOCK and EAGAIN */
 130         return EAGAIN;
 131     case WSAEINPROGRESS:
 132         return EINPROGRESS;
 133     case WSAEALREADY:
 134         return EALREADY;
 135     case WSAENOTSOCK:
 136         return ENOTSOCK;
 137     case WSAEDESTADDRREQ:
 138         return EDESTADDRREQ;
 139     case WSAEMSGSIZE:
 140         return EMSGSIZE;
 141     case WSAEPROTOTYPE:
 142         return EPROTOTYPE;
 143     case WSAENOPROTOOPT:
 144         return ENOPROTOOPT;
 145     case WSAEPROTONOSUPPORT:
 146         return EPROTONOSUPPORT;
 147     case WSAEOPNOTSUPP:
 148         return EOPNOTSUPP;
 149     case WSAEAFNOSUPPORT:
 150         return EAFNOSUPPORT;
 151     case WSAEADDRINUSE:
 152         return EADDRINUSE;
 153     case WSAEADDRNOTAVAIL:
 154         return EADDRNOTAVAIL;
 155     case WSAENETDOWN:
 156         return ENETDOWN;
 157     case WSAENETUNREACH:
 158         return ENETUNREACH;
 159     case WSAENETRESET:
 160         return ENETRESET;
 161     case WSAECONNABORTED:
 162         return ECONNABORTED;
 163     case WSAECONNRESET:
 164         return ECONNRESET;
 165     case WSAENOBUFS:
 166         return ENOBUFS;
 167     case WSAEISCONN:
 168         return EISCONN;
 169     case WSAENOTCONN:
 170         return ENOTCONN;
 171     case WSAETIMEDOUT:
 172         return ETIMEDOUT;
 173     case WSAECONNREFUSED:
 174         return ECONNREFUSED;
 175     case WSAELOOP:
 176         return ELOOP;
 177     case WSAEHOSTUNREACH:
 178         return EHOSTUNREACH;
 179     default:
 180         return EIO;
 181     }
 182 }
 183
 184 void qemu_socket_set_block(int fd)
 185 {
 186     unsigned long opt = 0;
 187     WSAEventSelect(fd, NULL, 0);
 188     ioctlsocket(fd, FIONBIO, &opt);
 189 }
 190
 191 int qemu_socket_try_set_nonblock(int fd)
 192 {
 193     unsigned long opt = 1;
 194     if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
 195         return -socket_error();
 196     }
 197     return 0;
 198 }
 199
 200 void qemu_socket_set_nonblock(int fd)
 201 {
 202     (void)qemu_socket_try_set_nonblock(fd);
 203 }
 204
 205 int socket_set_fast_reuse(int fd)
 206 {
 207     /* Enabling the reuse of an endpoint that was used by a socket still in
 208      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
 209      * fast reuse is the default and SO_REUSEADDR does strange things. So we
 210      * don't have to do anything here. More info can be found at:
 211      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
 212     return 0;
 213 }
 214
 215 int inet_aton(const char *cp, struct in_addr *ia)
 216 {
 217     uint32_t addr = inet_addr(cp);
 218     if (addr == 0xffffffff) {
 219         return 0;
 220     }
 221     ia->s_addr = addr;
 222     return 1;
 223 }
 224
 225 void qemu_set_cloexec(int fd)
 226 {
 227 }
 228
 229 int qemu_get_thread_id(void)
 230 {
 231     return GetCurrentThreadId();
 232 }
 233
 234 char *
 235 qemu_get_local_state_dir(void)
 236 {
 237     const char * const *data_dirs = g_get_system_data_dirs();
 238
 239     g_assert(data_dirs && data_dirs[0]);
 240
 241     return g_strdup(data_dirs[0]);
 242 }
 243
 244 void qemu_set_tty_echo(int fd, bool echo)
 245 {
 246     HANDLE handle = (HANDLE)_get_osfhandle(fd);
 247     DWORD dwMode = 0;
 248
 249     if (handle == INVALID_HANDLE_VALUE) {
 250         return;
 251     }
 252
 253     GetConsoleMode(handle, &dwMode);
 254
 255     if (echo) {
 256         SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
 257     } else {
 258         SetConsoleMode(handle,
 259                        dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
 260     }
 261 }
 262
 263 int getpagesize(void)
 264 {
 265     SYSTEM_INFO system_info;
 266
 267     GetSystemInfo(&system_info);
 268     return system_info.dwPageSize;
 269 }
 270
 271 void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
 272                      Error **errp)
 273 {
 274     int i;
 275     size_t pagesize = qemu_real_host_page_size();
 276
 277     memory = (memory + pagesize - 1) & -pagesize;
 278     for (i = 0; i < memory / pagesize; i++) {
 279         memset(area + pagesize * i, 0, 1);
 280     }
 281 }
 282
 283 char *qemu_get_pid_name(pid_t pid)
 284 {
 285     /* XXX Implement me */
 286     abort();
 287 }
 288
 289
 290 pid_t qemu_fork(Error **errp)
 291 {
 292     errno = ENOSYS;
 293     error_setg_errno(errp, errno,
 294                      "cannot fork child process");
 295     return -1;
 296 }
 297
 298
 299 #undef connect
 300 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
 301                       socklen_t addrlen)
 302 {
 303     int ret;
 304     ret = connect(sockfd, addr, addrlen);
 305     if (ret < 0) {
 306         if (WSAGetLastError() == WSAEWOULDBLOCK) {
 307             errno = EINPROGRESS;
 308         } else {
 309             errno = socket_error();
 310         }
 311     }
 312     return ret;
 313 }
 314
 315
 316 #undef listen
 317 int qemu_listen_wrap(int sockfd, int backlog)
 318 {
 319     int ret;
 320     ret = listen(sockfd, backlog);
 321     if (ret < 0) {
 322         errno = socket_error();
 323     }
 324     return ret;
 325 }
 326
 327
 328 #undef bind
 329 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
 330                    socklen_t addrlen)
 331 {
 332     int ret;
 333     ret = bind(sockfd, addr, addrlen);
 334     if (ret < 0) {
 335         errno = socket_error();
 336     }
 337     return ret;
 338 }
 339
 340
 341 #undef socket
 342 int qemu_socket_wrap(int domain, int type, int protocol)
 343 {
 344     int ret;
 345     ret = socket(domain, type, protocol);
 346     if (ret < 0) {
 347         errno = socket_error();
 348     }
 349     return ret;
 350 }
 351
 352
 353 #undef accept
 354 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
 355                      socklen_t *addrlen)
 356 {
 357     int ret;
 358     ret = accept(sockfd, addr, addrlen);
 359     if (ret < 0) {
 360         errno = socket_error();
 361     }
 362     return ret;
 363 }
 364
 365
 366 #undef shutdown
 367 int qemu_shutdown_wrap(int sockfd, int how)
 368 {
 369     int ret;
 370     ret = shutdown(sockfd, how);
 371     if (ret < 0) {
 372         errno = socket_error();
 373     }
 374     return ret;
 375 }
 376
 377
 378 #undef ioctlsocket
 379 int qemu_ioctlsocket_wrap(int fd, int req, void *val)
 380 {
 381     int ret;
 382     ret = ioctlsocket(fd, req, val);
 383     if (ret < 0) {
 384         errno = socket_error();
 385     }
 386     return ret;
 387 }
 388
 389
 390 #undef closesocket
 391 int qemu_closesocket_wrap(int fd)
 392 {
 393     int ret;
 394     ret = closesocket(fd);
 395     if (ret < 0) {
 396         errno = socket_error();
 397     }
 398     return ret;
 399 }
 400
 401
 402 #undef getsockopt
 403 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
 404                          void *optval, socklen_t *optlen)
 405 {
 406     int ret;
 407     ret = getsockopt(sockfd, level, optname, optval, optlen);
 408     if (ret < 0) {
 409         errno = socket_error();
 410     }
 411     return ret;
 412 }
 413
 414
 415 #undef setsockopt
 416 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
 417                          const void *optval, socklen_t optlen)
 418 {
 419     int ret;
 420     ret = setsockopt(sockfd, level, optname, optval, optlen);
 421     if (ret < 0) {
 422         errno = socket_error();
 423     }
 424     return ret;
 425 }
 426
 427
 428 #undef getpeername
 429 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
 430                           socklen_t *addrlen)
 431 {
 432     int ret;
 433     ret = getpeername(sockfd, addr, addrlen);
 434     if (ret < 0) {
 435         errno = socket_error();
 436     }
 437     return ret;
 438 }
 439
 440
 441 #undef getsockname
 442 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
 443                           socklen_t *addrlen)
 444 {
 445     int ret;
 446     ret = getsockname(sockfd, addr, addrlen);
 447     if (ret < 0) {
 448         errno = socket_error();
 449     }
 450     return ret;
 451 }
 452
 453
 454 #undef send
 455 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
 456 {
 457     int ret;
 458     ret = send(sockfd, buf, len, flags);
 459     if (ret < 0) {
 460         errno = socket_error();
 461     }
 462     return ret;
 463 }
 464
 465
 466 #undef sendto
 467 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
 468                          const struct sockaddr *addr, socklen_t addrlen)
 469 {
 470     int ret;
 471     ret = sendto(sockfd, buf, len, flags, addr, addrlen);
 472     if (ret < 0) {
 473         errno = socket_error();
 474     }
 475     return ret;
 476 }
 477
 478
 479 #undef recv
 480 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
 481 {
 482     int ret;
 483     ret = recv(sockfd, buf, len, flags);
 484     if (ret < 0) {
 485         errno = socket_error();
 486     }
 487     return ret;
 488 }
 489
 490
 491 #undef recvfrom
 492 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
 493                            struct sockaddr *addr, socklen_t *addrlen)
 494 {
 495     int ret;
 496     ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
 497     if (ret < 0) {
 498         errno = socket_error();
 499     }
 500     return ret;
 501 }
 502
 503 bool qemu_write_pidfile(const char *filename, Error **errp)
 504 {
 505     char buffer[128];
 506     int len;
 507     HANDLE file;
 508     OVERLAPPED overlap;
 509     BOOL ret;
 510     memset(&overlap, 0, sizeof(overlap));
 511
 512     file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
 513                       OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 514
 515     if (file == INVALID_HANDLE_VALUE) {
 516         error_setg(errp, "Failed to create PID file");
 517         return false;
 518     }
 519     len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid());
 520     ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
 521                     NULL, &overlap);
 522     CloseHandle(file);
 523     if (ret == 0) {
 524         error_setg(errp, "Failed to write PID file");
 525         return false;
 526     }
 527     return true;
 528 }
 529
 530 size_t qemu_get_host_physmem(void)
 531 {
 532     MEMORYSTATUSEX statex;
 533     statex.dwLength = sizeof(statex);
 534
 535     if (GlobalMemoryStatusEx(&statex)) {
 536         return statex.ullTotalPhys;
 537     }
 538     return 0;
 539 }
 540
 541 int qemu_msync(void *addr, size_t length, int fd)
 542 {
 543     /**
 544      * Perform the sync based on the file descriptor
 545      * The sync range will most probably be wider than the one
 546      * requested - but it will still get the job done
 547      */
 548     return qemu_fdatasync(fd);
 549 }