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