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