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 void *qemu_oom_check(void *ptr)
  48 {
  49     if (ptr == NULL) {
  50         fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
  51         abort();
  52     }
  53     return ptr;
  54 }
  55
  56 void *qemu_try_memalign(size_t alignment, size_t size)
  57 {
  58     void *ptr;
  59
  60     g_assert(size != 0);
  61     if (alignment < sizeof(void *)) {
  62         alignment = sizeof(void *);
  63     } else {
  64         g_assert(is_power_of_2(alignment));
  65     }
  66     ptr = _aligned_malloc(size, alignment);
  67     trace_qemu_memalign(alignment, size, ptr);
  68     return ptr;
  69 }
  70
  71 void *qemu_memalign(size_t alignment, size_t size)
  72 {
  73     return qemu_oom_check(qemu_try_memalign(alignment, size));
  74 }
  75
  76 static int get_allocation_granularity(void)
  77 {
  78     SYSTEM_INFO system_info;
  79
  80     GetSystemInfo(&system_info);
  81     return system_info.dwAllocationGranularity;
  82 }
  83
  84 void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared,
  85                           bool noreserve)
  86 {
  87     void *ptr;
  88
  89     if (noreserve) {
  90         /*
  91          * We need a MEM_COMMIT before accessing any memory in a MEM_RESERVE
  92          * area; we cannot easily mimic POSIX MAP_NORESERVE semantics.
  93          */
  94         error_report("Skipping reservation of swap space is not supported.");
  95         return NULL;
  96     }
  97
  98     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  99     trace_qemu_anon_ram_alloc(size, ptr);
 100
 101     if (ptr && align) {
 102         *align = MAX(get_allocation_granularity(), getpagesize());
 103     }
 104     return ptr;
 105 }
 106
 107 void qemu_vfree(void *ptr)
 108 {
 109     trace_qemu_vfree(ptr);
 110     _aligned_free(ptr);
 111 }
 112
 113 void qemu_anon_ram_free(void *ptr, size_t size)
 114 {
 115     trace_qemu_anon_ram_free(ptr, size);
 116     if (ptr) {
 117         VirtualFree(ptr, 0, MEM_RELEASE);
 118     }
 119 }
 120
 121 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS
 122 /* FIXME: add proper locking */
 123 struct tm *gmtime_r(const time_t *timep, struct tm *result)
 124 {
 125     struct tm *p = gmtime(timep);
 126     memset(result, 0, sizeof(*result));
 127     if (p) {
 128         *result = *p;
 129         p = result;
 130     }
 131     return p;
 132 }
 133
 134 /* FIXME: add proper locking */
 135 struct tm *localtime_r(const time_t *timep, struct tm *result)
 136 {
 137     struct tm *p = localtime(timep);
 138     memset(result, 0, sizeof(*result));
 139     if (p) {
 140         *result = *p;
 141         p = result;
 142     }
 143     return p;
 144 }
 145 #endif /* _POSIX_THREAD_SAFE_FUNCTIONS */
 146
 147 static int socket_error(void)
 148 {
 149     switch (WSAGetLastError()) {
 150     case 0:
 151         return 0;
 152     case WSAEINTR:
 153         return EINTR;
 154     case WSAEINVAL:
 155         return EINVAL;
 156     case WSA_INVALID_HANDLE:
 157         return EBADF;
 158     case WSA_NOT_ENOUGH_MEMORY:
 159         return ENOMEM;
 160     case WSA_INVALID_PARAMETER:
 161         return EINVAL;
 162     case WSAENAMETOOLONG:
 163         return ENAMETOOLONG;
 164     case WSAENOTEMPTY:
 165         return ENOTEMPTY;
 166     case WSAEWOULDBLOCK:
 167          /* not using EWOULDBLOCK as we don't want code to have
 168           * to check both EWOULDBLOCK and EAGAIN */
 169         return EAGAIN;
 170     case WSAEINPROGRESS:
 171         return EINPROGRESS;
 172     case WSAEALREADY:
 173         return EALREADY;
 174     case WSAENOTSOCK:
 175         return ENOTSOCK;
 176     case WSAEDESTADDRREQ:
 177         return EDESTADDRREQ;
 178     case WSAEMSGSIZE:
 179         return EMSGSIZE;
 180     case WSAEPROTOTYPE:
 181         return EPROTOTYPE;
 182     case WSAENOPROTOOPT:
 183         return ENOPROTOOPT;
 184     case WSAEPROTONOSUPPORT:
 185         return EPROTONOSUPPORT;
 186     case WSAEOPNOTSUPP:
 187         return EOPNOTSUPP;
 188     case WSAEAFNOSUPPORT:
 189         return EAFNOSUPPORT;
 190     case WSAEADDRINUSE:
 191         return EADDRINUSE;
 192     case WSAEADDRNOTAVAIL:
 193         return EADDRNOTAVAIL;
 194     case WSAENETDOWN:
 195         return ENETDOWN;
 196     case WSAENETUNREACH:
 197         return ENETUNREACH;
 198     case WSAENETRESET:
 199         return ENETRESET;
 200     case WSAECONNABORTED:
 201         return ECONNABORTED;
 202     case WSAECONNRESET:
 203         return ECONNRESET;
 204     case WSAENOBUFS:
 205         return ENOBUFS;
 206     case WSAEISCONN:
 207         return EISCONN;
 208     case WSAENOTCONN:
 209         return ENOTCONN;
 210     case WSAETIMEDOUT:
 211         return ETIMEDOUT;
 212     case WSAECONNREFUSED:
 213         return ECONNREFUSED;
 214     case WSAELOOP:
 215         return ELOOP;
 216     case WSAEHOSTUNREACH:
 217         return EHOSTUNREACH;
 218     default:
 219         return EIO;
 220     }
 221 }
 222
 223 void qemu_set_block(int fd)
 224 {
 225     unsigned long opt = 0;
 226     WSAEventSelect(fd, NULL, 0);
 227     ioctlsocket(fd, FIONBIO, &opt);
 228 }
 229
 230 int qemu_try_set_nonblock(int fd)
 231 {
 232     unsigned long opt = 1;
 233     if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
 234         return -socket_error();
 235     }
 236     return 0;
 237 }
 238
 239 void qemu_set_nonblock(int fd)
 240 {
 241     (void)qemu_try_set_nonblock(fd);
 242 }
 243
 244 int socket_set_fast_reuse(int fd)
 245 {
 246     /* Enabling the reuse of an endpoint that was used by a socket still in
 247      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
 248      * fast reuse is the default and SO_REUSEADDR does strange things. So we
 249      * don't have to do anything here. More info can be found at:
 250      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
 251     return 0;
 252 }
 253
 254 int inet_aton(const char *cp, struct in_addr *ia)
 255 {
 256     uint32_t addr = inet_addr(cp);
 257     if (addr == 0xffffffff) {
 258         return 0;
 259     }
 260     ia->s_addr = addr;
 261     return 1;
 262 }
 263
 264 void qemu_set_cloexec(int fd)
 265 {
 266 }
 267
 268 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
 269 #define _W32_FT_OFFSET (116444736000000000ULL)
 270
 271 int qemu_gettimeofday(qemu_timeval *tp)
 272 {
 273   union {
 274     unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
 275     FILETIME ft;
 276   }  _now;
 277
 278   if(tp) {
 279       GetSystemTimeAsFileTime (&_now.ft);
 280       tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
 281       tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
 282   }
 283   /* Always return 0 as per Open Group Base Specifications Issue 6.
 284      Do not set errno on error.  */
 285   return 0;
 286 }
 287
 288 int qemu_get_thread_id(void)
 289 {
 290     return GetCurrentThreadId();
 291 }
 292
 293 char *
 294 qemu_get_local_state_pathname(const char *relative_pathname)
 295 {
 296     HRESULT result;
 297     char base_path[MAX_PATH+1] = "";
 298
 299     result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
 300                              /* SHGFP_TYPE_CURRENT */ 0, base_path);
 301     if (result != S_OK) {
 302         /* misconfigured environment */
 303         g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
 304         abort();
 305     }
 306     return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
 307                            relative_pathname);
 308 }
 309
 310 void qemu_set_tty_echo(int fd, bool echo)
 311 {
 312     HANDLE handle = (HANDLE)_get_osfhandle(fd);
 313     DWORD dwMode = 0;
 314
 315     if (handle == INVALID_HANDLE_VALUE) {
 316         return;
 317     }
 318
 319     GetConsoleMode(handle, &dwMode);
 320
 321     if (echo) {
 322         SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
 323     } else {
 324         SetConsoleMode(handle,
 325                        dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
 326     }
 327 }
 328
 329 static const char *exec_dir;
 330
 331 void qemu_init_exec_dir(const char *argv0)
 332 {
 333
 334     char *p;
 335     char buf[MAX_PATH];
 336     DWORD len;
 337
 338     if (exec_dir) {
 339         return;
 340     }
 341
 342     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
 343     if (len == 0) {
 344         return;
 345     }
 346
 347     buf[len] = 0;
 348     p = buf + len - 1;
 349     while (p != buf && *p != '\\') {
 350         p--;
 351     }
 352     *p = 0;
 353     if (access(buf, R_OK) == 0) {
 354         exec_dir = g_strdup(buf);
 355     } else {
 356         exec_dir = CONFIG_BINDIR;
 357     }
 358 }
 359
 360 const char *qemu_get_exec_dir(void)
 361 {
 362     return exec_dir;
 363 }
 364
 365 int getpagesize(void)
 366 {
 367     SYSTEM_INFO system_info;
 368
 369     GetSystemInfo(&system_info);
 370     return system_info.dwPageSize;
 371 }
 372
 373 void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
 374                      Error **errp)
 375 {
 376     int i;
 377     size_t pagesize = qemu_real_host_page_size;
 378
 379     memory = (memory + pagesize - 1) & -pagesize;
 380     for (i = 0; i < memory / pagesize; i++) {
 381         memset(area + pagesize * i, 0, 1);
 382     }
 383 }
 384
 385 char *qemu_get_pid_name(pid_t pid)
 386 {
 387     /* XXX Implement me */
 388     abort();
 389 }
 390
 391
 392 pid_t qemu_fork(Error **errp)
 393 {
 394     errno = ENOSYS;
 395     error_setg_errno(errp, errno,
 396                      "cannot fork child process");
 397     return -1;
 398 }
 399
 400
 401 #undef connect
 402 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
 403                       socklen_t addrlen)
 404 {
 405     int ret;
 406     ret = connect(sockfd, addr, addrlen);
 407     if (ret < 0) {
 408         if (WSAGetLastError() == WSAEWOULDBLOCK) {
 409             errno = EINPROGRESS;
 410         } else {
 411             errno = socket_error();
 412         }
 413     }
 414     return ret;
 415 }
 416
 417
 418 #undef listen
 419 int qemu_listen_wrap(int sockfd, int backlog)
 420 {
 421     int ret;
 422     ret = listen(sockfd, backlog);
 423     if (ret < 0) {
 424         errno = socket_error();
 425     }
 426     return ret;
 427 }
 428
 429
 430 #undef bind
 431 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
 432                    socklen_t addrlen)
 433 {
 434     int ret;
 435     ret = bind(sockfd, addr, addrlen);
 436     if (ret < 0) {
 437         errno = socket_error();
 438     }
 439     return ret;
 440 }
 441
 442
 443 #undef socket
 444 int qemu_socket_wrap(int domain, int type, int protocol)
 445 {
 446     int ret;
 447     ret = socket(domain, type, protocol);
 448     if (ret < 0) {
 449         errno = socket_error();
 450     }
 451     return ret;
 452 }
 453
 454
 455 #undef accept
 456 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
 457                      socklen_t *addrlen)
 458 {
 459     int ret;
 460     ret = accept(sockfd, addr, addrlen);
 461     if (ret < 0) {
 462         errno = socket_error();
 463     }
 464     return ret;
 465 }
 466
 467
 468 #undef shutdown
 469 int qemu_shutdown_wrap(int sockfd, int how)
 470 {
 471     int ret;
 472     ret = shutdown(sockfd, how);
 473     if (ret < 0) {
 474         errno = socket_error();
 475     }
 476     return ret;
 477 }
 478
 479
 480 #undef ioctlsocket
 481 int qemu_ioctlsocket_wrap(int fd, int req, void *val)
 482 {
 483     int ret;
 484     ret = ioctlsocket(fd, req, val);
 485     if (ret < 0) {
 486         errno = socket_error();
 487     }
 488     return ret;
 489 }
 490
 491
 492 #undef closesocket
 493 int qemu_closesocket_wrap(int fd)
 494 {
 495     int ret;
 496     ret = closesocket(fd);
 497     if (ret < 0) {
 498         errno = socket_error();
 499     }
 500     return ret;
 501 }
 502
 503
 504 #undef getsockopt
 505 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
 506                          void *optval, socklen_t *optlen)
 507 {
 508     int ret;
 509     ret = getsockopt(sockfd, level, optname, optval, optlen);
 510     if (ret < 0) {
 511         errno = socket_error();
 512     }
 513     return ret;
 514 }
 515
 516
 517 #undef setsockopt
 518 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
 519                          const void *optval, socklen_t optlen)
 520 {
 521     int ret;
 522     ret = setsockopt(sockfd, level, optname, optval, optlen);
 523     if (ret < 0) {
 524         errno = socket_error();
 525     }
 526     return ret;
 527 }
 528
 529
 530 #undef getpeername
 531 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
 532                           socklen_t *addrlen)
 533 {
 534     int ret;
 535     ret = getpeername(sockfd, addr, addrlen);
 536     if (ret < 0) {
 537         errno = socket_error();
 538     }
 539     return ret;
 540 }
 541
 542
 543 #undef getsockname
 544 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
 545                           socklen_t *addrlen)
 546 {
 547     int ret;
 548     ret = getsockname(sockfd, addr, addrlen);
 549     if (ret < 0) {
 550         errno = socket_error();
 551     }
 552     return ret;
 553 }
 554
 555
 556 #undef send
 557 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
 558 {
 559     int ret;
 560     ret = send(sockfd, buf, len, flags);
 561     if (ret < 0) {
 562         errno = socket_error();
 563     }
 564     return ret;
 565 }
 566
 567
 568 #undef sendto
 569 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
 570                          const struct sockaddr *addr, socklen_t addrlen)
 571 {
 572     int ret;
 573     ret = sendto(sockfd, buf, len, flags, addr, addrlen);
 574     if (ret < 0) {
 575         errno = socket_error();
 576     }
 577     return ret;
 578 }
 579
 580
 581 #undef recv
 582 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
 583 {
 584     int ret;
 585     ret = recv(sockfd, buf, len, flags);
 586     if (ret < 0) {
 587         errno = socket_error();
 588     }
 589     return ret;
 590 }
 591
 592
 593 #undef recvfrom
 594 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
 595                            struct sockaddr *addr, socklen_t *addrlen)
 596 {
 597     int ret;
 598     ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
 599     if (ret < 0) {
 600         errno = socket_error();
 601     }
 602     return ret;
 603 }
 604
 605 bool qemu_write_pidfile(const char *filename, Error **errp)
 606 {
 607     char buffer[128];
 608     int len;
 609     HANDLE file;
 610     OVERLAPPED overlap;
 611     BOOL ret;
 612     memset(&overlap, 0, sizeof(overlap));
 613
 614     file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
 615                       OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 616
 617     if (file == INVALID_HANDLE_VALUE) {
 618         error_setg(errp, "Failed to create PID file");
 619         return false;
 620     }
 621     len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid());
 622     ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
 623                     NULL, &overlap);
 624     CloseHandle(file);
 625     if (ret == 0) {
 626         error_setg(errp, "Failed to write PID file");
 627         return false;
 628     }
 629     return true;
 630 }
 631
 632 char *qemu_get_host_name(Error **errp)
 633 {
 634     wchar_t tmp[MAX_COMPUTERNAME_LENGTH + 1];
 635     DWORD size = G_N_ELEMENTS(tmp);
 636
 637     if (GetComputerNameW(tmp, &size) == 0) {
 638         error_setg_win32(errp, GetLastError(), "failed close handle");
 639         return NULL;
 640     }
 641
 642     return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL);
 643 }
 644
 645 size_t qemu_get_host_physmem(void)
 646 {
 647     MEMORYSTATUSEX statex;
 648     statex.dwLength = sizeof(statex);
 649
 650     if (GlobalMemoryStatusEx(&statex)) {
 651         return statex.ullTotalPhys;
 652     }
 653     return 0;
 654 }