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 "qemu-common.h"
  36 #include "qapi/error.h"
  37 #include "qemu/main-loop.h"
  38 #include "trace.h"
  39 #include "qemu/sockets.h"
  40 #include "qemu/cutils.h"
  41 #include "qemu/error-report.h"
  42 #include <malloc.h>
  43
  44 /* this must come after including "trace.h" */
  45 #include <shlobj.h>
  46
  47 static int get_allocation_granularity(void)
  48 {
  49     SYSTEM_INFO system_info;
  50
  51     GetSystemInfo(&system_info);
  52     return system_info.dwAllocationGranularity;
  53 }
  54
  55 void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared,
  56                           bool noreserve)
  57 {
  58     void *ptr;
  59
  60     if (noreserve) {
  61         /*
  62          * We need a MEM_COMMIT before accessing any memory in a MEM_RESERVE
  63          * area; we cannot easily mimic POSIX MAP_NORESERVE semantics.
  64          */
  65         error_report("Skipping reservation of swap space is not supported.");
  66         return NULL;
  67     }
  68
  69     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  70     trace_qemu_anon_ram_alloc(size, ptr);
  71
  72     if (ptr && align) {
  73         *align = MAX(get_allocation_granularity(), getpagesize());
  74     }
  75     return ptr;
  76 }
  77
  78 void qemu_anon_ram_free(void *ptr, size_t size)
  79 {
  80     trace_qemu_anon_ram_free(ptr, size);
  81     if (ptr) {
  82         VirtualFree(ptr, 0, MEM_RELEASE);
  83     }
  84 }
  85
  86 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS
  87 /* FIXME: add proper locking */
  88 struct tm *gmtime_r(const time_t *timep, struct tm *result)
  89 {
  90     struct tm *p = gmtime(timep);
  91     memset(result, 0, sizeof(*result));
  92     if (p) {
  93         *result = *p;
  94         p = result;
  95     }
  96     return p;
  97 }
  98
  99 /* FIXME: add proper locking */
 100 struct tm *localtime_r(const time_t *timep, struct tm *result)
 101 {
 102     struct tm *p = localtime(timep);
 103     memset(result, 0, sizeof(*result));
 104     if (p) {
 105         *result = *p;
 106         p = result;
 107     }
 108     return p;
 109 }
 110 #endif /* _POSIX_THREAD_SAFE_FUNCTIONS */
 111
 112 static int socket_error(void)
 113 {
 114     switch (WSAGetLastError()) {
 115     case 0:
 116         return 0;
 117     case WSAEINTR:
 118         return EINTR;
 119     case WSAEINVAL:
 120         return EINVAL;
 121     case WSA_INVALID_HANDLE:
 122         return EBADF;
 123     case WSA_NOT_ENOUGH_MEMORY:
 124         return ENOMEM;
 125     case WSA_INVALID_PARAMETER:
 126         return EINVAL;
 127     case WSAENAMETOOLONG:
 128         return ENAMETOOLONG;
 129     case WSAENOTEMPTY:
 130         return ENOTEMPTY;
 131     case WSAEWOULDBLOCK:
 132          /* not using EWOULDBLOCK as we don't want code to have
 133           * to check both EWOULDBLOCK and EAGAIN */
 134         return EAGAIN;
 135     case WSAEINPROGRESS:
 136         return EINPROGRESS;
 137     case WSAEALREADY:
 138         return EALREADY;
 139     case WSAENOTSOCK:
 140         return ENOTSOCK;
 141     case WSAEDESTADDRREQ:
 142         return EDESTADDRREQ;
 143     case WSAEMSGSIZE:
 144         return EMSGSIZE;
 145     case WSAEPROTOTYPE:
 146         return EPROTOTYPE;
 147     case WSAENOPROTOOPT:
 148         return ENOPROTOOPT;
 149     case WSAEPROTONOSUPPORT:
 150         return EPROTONOSUPPORT;
 151     case WSAEOPNOTSUPP:
 152         return EOPNOTSUPP;
 153     case WSAEAFNOSUPPORT:
 154         return EAFNOSUPPORT;
 155     case WSAEADDRINUSE:
 156         return EADDRINUSE;
 157     case WSAEADDRNOTAVAIL:
 158         return EADDRNOTAVAIL;
 159     case WSAENETDOWN:
 160         return ENETDOWN;
 161     case WSAENETUNREACH:
 162         return ENETUNREACH;
 163     case WSAENETRESET:
 164         return ENETRESET;
 165     case WSAECONNABORTED:
 166         return ECONNABORTED;
 167     case WSAECONNRESET:
 168         return ECONNRESET;
 169     case WSAENOBUFS:
 170         return ENOBUFS;
 171     case WSAEISCONN:
 172         return EISCONN;
 173     case WSAENOTCONN:
 174         return ENOTCONN;
 175     case WSAETIMEDOUT:
 176         return ETIMEDOUT;
 177     case WSAECONNREFUSED:
 178         return ECONNREFUSED;
 179     case WSAELOOP:
 180         return ELOOP;
 181     case WSAEHOSTUNREACH:
 182         return EHOSTUNREACH;
 183     default:
 184         return EIO;
 185     }
 186 }
 187
 188 void qemu_set_block(int fd)
 189 {
 190     unsigned long opt = 0;
 191     WSAEventSelect(fd, NULL, 0);
 192     ioctlsocket(fd, FIONBIO, &opt);
 193 }
 194
 195 int qemu_try_set_nonblock(int fd)
 196 {
 197     unsigned long opt = 1;
 198     if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
 199         return -socket_error();
 200     }
 201     return 0;
 202 }
 203
 204 void qemu_set_nonblock(int fd)
 205 {
 206     (void)qemu_try_set_nonblock(fd);
 207 }
 208
 209 int socket_set_fast_reuse(int fd)
 210 {
 211     /* Enabling the reuse of an endpoint that was used by a socket still in
 212      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
 213      * fast reuse is the default and SO_REUSEADDR does strange things. So we
 214      * don't have to do anything here. More info can be found at:
 215      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
 216     return 0;
 217 }
 218
 219 int inet_aton(const char *cp, struct in_addr *ia)
 220 {
 221     uint32_t addr = inet_addr(cp);
 222     if (addr == 0xffffffff) {
 223         return 0;
 224     }
 225     ia->s_addr = addr;
 226     return 1;
 227 }
 228
 229 void qemu_set_cloexec(int fd)
 230 {
 231 }
 232
 233 int qemu_get_thread_id(void)
 234 {
 235     return GetCurrentThreadId();
 236 }
 237
 238 char *
 239 qemu_get_local_state_pathname(const char *relative_pathname)
 240 {
 241     HRESULT result;
 242     char base_path[MAX_PATH+1] = "";
 243
 244     result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
 245                              /* SHGFP_TYPE_CURRENT */ 0, base_path);
 246     if (result != S_OK) {
 247         /* misconfigured environment */
 248         g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
 249         abort();
 250     }
 251     return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
 252                            relative_pathname);
 253 }
 254
 255 void qemu_set_tty_echo(int fd, bool echo)
 256 {
 257     HANDLE handle = (HANDLE)_get_osfhandle(fd);
 258     DWORD dwMode = 0;
 259
 260     if (handle == INVALID_HANDLE_VALUE) {
 261         return;
 262     }
 263
 264     GetConsoleMode(handle, &dwMode);
 265
 266     if (echo) {
 267         SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
 268     } else {
 269         SetConsoleMode(handle,
 270                        dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
 271     }
 272 }
 273
 274 static const char *exec_dir;
 275
 276 void qemu_init_exec_dir(const char *argv0)
 277 {
 278
 279     char *p;
 280     char buf[MAX_PATH];
 281     DWORD len;
 282
 283     if (exec_dir) {
 284         return;
 285     }
 286
 287     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
 288     if (len == 0) {
 289         return;
 290     }
 291
 292     buf[len] = 0;
 293     p = buf + len - 1;
 294     while (p != buf && *p != '\\') {
 295         p--;
 296     }
 297     *p = 0;
 298     if (access(buf, R_OK) == 0) {
 299         exec_dir = g_strdup(buf);
 300     } else {
 301         exec_dir = CONFIG_BINDIR;
 302     }
 303 }
 304
 305 const char *qemu_get_exec_dir(void)
 306 {
 307     return exec_dir;
 308 }
 309
 310 int getpagesize(void)
 311 {
 312     SYSTEM_INFO system_info;
 313
 314     GetSystemInfo(&system_info);
 315     return system_info.dwPageSize;
 316 }
 317
 318 void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
 319                      Error **errp)
 320 {
 321     int i;
 322     size_t pagesize = qemu_real_host_page_size();
 323
 324     memory = (memory + pagesize - 1) & -pagesize;
 325     for (i = 0; i < memory / pagesize; i++) {
 326         memset(area + pagesize * i, 0, 1);
 327     }
 328 }
 329
 330 char *qemu_get_pid_name(pid_t pid)
 331 {
 332     /* XXX Implement me */
 333     abort();
 334 }
 335
 336
 337 pid_t qemu_fork(Error **errp)
 338 {
 339     errno = ENOSYS;
 340     error_setg_errno(errp, errno,
 341                      "cannot fork child process");
 342     return -1;
 343 }
 344
 345
 346 #undef connect
 347 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
 348                       socklen_t addrlen)
 349 {
 350     int ret;
 351     ret = connect(sockfd, addr, addrlen);
 352     if (ret < 0) {
 353         if (WSAGetLastError() == WSAEWOULDBLOCK) {
 354             errno = EINPROGRESS;
 355         } else {
 356             errno = socket_error();
 357         }
 358     }
 359     return ret;
 360 }
 361
 362
 363 #undef listen
 364 int qemu_listen_wrap(int sockfd, int backlog)
 365 {
 366     int ret;
 367     ret = listen(sockfd, backlog);
 368     if (ret < 0) {
 369         errno = socket_error();
 370     }
 371     return ret;
 372 }
 373
 374
 375 #undef bind
 376 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
 377                    socklen_t addrlen)
 378 {
 379     int ret;
 380     ret = bind(sockfd, addr, addrlen);
 381     if (ret < 0) {
 382         errno = socket_error();
 383     }
 384     return ret;
 385 }
 386
 387
 388 #undef socket
 389 int qemu_socket_wrap(int domain, int type, int protocol)
 390 {
 391     int ret;
 392     ret = socket(domain, type, protocol);
 393     if (ret < 0) {
 394         errno = socket_error();
 395     }
 396     return ret;
 397 }
 398
 399
 400 #undef accept
 401 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
 402                      socklen_t *addrlen)
 403 {
 404     int ret;
 405     ret = accept(sockfd, addr, addrlen);
 406     if (ret < 0) {
 407         errno = socket_error();
 408     }
 409     return ret;
 410 }
 411
 412
 413 #undef shutdown
 414 int qemu_shutdown_wrap(int sockfd, int how)
 415 {
 416     int ret;
 417     ret = shutdown(sockfd, how);
 418     if (ret < 0) {
 419         errno = socket_error();
 420     }
 421     return ret;
 422 }
 423
 424
 425 #undef ioctlsocket
 426 int qemu_ioctlsocket_wrap(int fd, int req, void *val)
 427 {
 428     int ret;
 429     ret = ioctlsocket(fd, req, val);
 430     if (ret < 0) {
 431         errno = socket_error();
 432     }
 433     return ret;
 434 }
 435
 436
 437 #undef closesocket
 438 int qemu_closesocket_wrap(int fd)
 439 {
 440     int ret;
 441     ret = closesocket(fd);
 442     if (ret < 0) {
 443         errno = socket_error();
 444     }
 445     return ret;
 446 }
 447
 448
 449 #undef getsockopt
 450 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
 451                          void *optval, socklen_t *optlen)
 452 {
 453     int ret;
 454     ret = getsockopt(sockfd, level, optname, optval, optlen);
 455     if (ret < 0) {
 456         errno = socket_error();
 457     }
 458     return ret;
 459 }
 460
 461
 462 #undef setsockopt
 463 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
 464                          const void *optval, socklen_t optlen)
 465 {
 466     int ret;
 467     ret = setsockopt(sockfd, level, optname, optval, optlen);
 468     if (ret < 0) {
 469         errno = socket_error();
 470     }
 471     return ret;
 472 }
 473
 474
 475 #undef getpeername
 476 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
 477                           socklen_t *addrlen)
 478 {
 479     int ret;
 480     ret = getpeername(sockfd, addr, addrlen);
 481     if (ret < 0) {
 482         errno = socket_error();
 483     }
 484     return ret;
 485 }
 486
 487
 488 #undef getsockname
 489 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
 490                           socklen_t *addrlen)
 491 {
 492     int ret;
 493     ret = getsockname(sockfd, addr, addrlen);
 494     if (ret < 0) {
 495         errno = socket_error();
 496     }
 497     return ret;
 498 }
 499
 500
 501 #undef send
 502 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
 503 {
 504     int ret;
 505     ret = send(sockfd, buf, len, flags);
 506     if (ret < 0) {
 507         errno = socket_error();
 508     }
 509     return ret;
 510 }
 511
 512
 513 #undef sendto
 514 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
 515                          const struct sockaddr *addr, socklen_t addrlen)
 516 {
 517     int ret;
 518     ret = sendto(sockfd, buf, len, flags, addr, addrlen);
 519     if (ret < 0) {
 520         errno = socket_error();
 521     }
 522     return ret;
 523 }
 524
 525
 526 #undef recv
 527 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
 528 {
 529     int ret;
 530     ret = recv(sockfd, buf, len, flags);
 531     if (ret < 0) {
 532         errno = socket_error();
 533     }
 534     return ret;
 535 }
 536
 537
 538 #undef recvfrom
 539 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
 540                            struct sockaddr *addr, socklen_t *addrlen)
 541 {
 542     int ret;
 543     ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
 544     if (ret < 0) {
 545         errno = socket_error();
 546     }
 547     return ret;
 548 }
 549
 550 bool qemu_write_pidfile(const char *filename, Error **errp)
 551 {
 552     char buffer[128];
 553     int len;
 554     HANDLE file;
 555     OVERLAPPED overlap;
 556     BOOL ret;
 557     memset(&overlap, 0, sizeof(overlap));
 558
 559     file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
 560                       OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 561
 562     if (file == INVALID_HANDLE_VALUE) {
 563         error_setg(errp, "Failed to create PID file");
 564         return false;
 565     }
 566     len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid());
 567     ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
 568                     NULL, &overlap);
 569     CloseHandle(file);
 570     if (ret == 0) {
 571         error_setg(errp, "Failed to write PID file");
 572         return false;
 573     }
 574     return true;
 575 }
 576
 577 char *qemu_get_host_name(Error **errp)
 578 {
 579     wchar_t tmp[MAX_COMPUTERNAME_LENGTH + 1];
 580     DWORD size = G_N_ELEMENTS(tmp);
 581
 582     if (GetComputerNameW(tmp, &size) == 0) {
 583         error_setg_win32(errp, GetLastError(), "failed close handle");
 584         return NULL;
 585     }
 586
 587     return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL);
 588 }
 589
 590 size_t qemu_get_host_physmem(void)
 591 {
 592     MEMORYSTATUSEX statex;
 593     statex.dwLength = sizeof(statex);
 594
 595     if (GlobalMemoryStatusEx(&statex)) {
 596         return statex.ullTotalPhys;
 597     }
 598     return 0;
 599 }