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 <malloc.h>
  42
  43 /* this must come after including "trace.h" */
  44 #include <shlobj.h>
  45
  46 void *qemu_oom_check(void *ptr)
  47 {
  48     if (ptr == NULL) {
  49         fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
  50         abort();
  51     }
  52     return ptr;
  53 }
  54
  55 void *qemu_try_memalign(size_t alignment, size_t size)
  56 {
  57     void *ptr;
  58
  59     g_assert(size != 0);
  60     g_assert(is_power_of_2(alignment));
  61     ptr = _aligned_malloc(size, alignment);
  62     trace_qemu_memalign(alignment, size, ptr);
  63     return ptr;
  64 }
  65
  66 void *qemu_memalign(size_t alignment, size_t size)
  67 {
  68     return qemu_oom_check(qemu_try_memalign(alignment, size));
  69 }
  70
  71 static int get_allocation_granularity(void)
  72 {
  73     SYSTEM_INFO system_info;
  74
  75     GetSystemInfo(&system_info);
  76     return system_info.dwAllocationGranularity;
  77 }
  78
  79 void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared)
  80 {
  81     void *ptr;
  82
  83     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  84     trace_qemu_anon_ram_alloc(size, ptr);
  85
  86     if (ptr && align) {
  87         *align = MAX(get_allocation_granularity(), getpagesize());
  88     }
  89     return ptr;
  90 }
  91
  92 void qemu_vfree(void *ptr)
  93 {
  94     trace_qemu_vfree(ptr);
  95     _aligned_free(ptr);
  96 }
  97
  98 void qemu_anon_ram_free(void *ptr, size_t size)
  99 {
 100     trace_qemu_anon_ram_free(ptr, size);
 101     if (ptr) {
 102         VirtualFree(ptr, 0, MEM_RELEASE);
 103     }
 104 }
 105
 106 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS
 107 /* FIXME: add proper locking */
 108 struct tm *gmtime_r(const time_t *timep, struct tm *result)
 109 {
 110     struct tm *p = gmtime(timep);
 111     memset(result, 0, sizeof(*result));
 112     if (p) {
 113         *result = *p;
 114         p = result;
 115     }
 116     return p;
 117 }
 118
 119 /* FIXME: add proper locking */
 120 struct tm *localtime_r(const time_t *timep, struct tm *result)
 121 {
 122     struct tm *p = localtime(timep);
 123     memset(result, 0, sizeof(*result));
 124     if (p) {
 125         *result = *p;
 126         p = result;
 127     }
 128     return p;
 129 }
 130 #endif /* _POSIX_THREAD_SAFE_FUNCTIONS */
 131
 132 static int socket_error(void)
 133 {
 134     switch (WSAGetLastError()) {
 135     case 0:
 136         return 0;
 137     case WSAEINTR:
 138         return EINTR;
 139     case WSAEINVAL:
 140         return EINVAL;
 141     case WSA_INVALID_HANDLE:
 142         return EBADF;
 143     case WSA_NOT_ENOUGH_MEMORY:
 144         return ENOMEM;
 145     case WSA_INVALID_PARAMETER:
 146         return EINVAL;
 147     case WSAENAMETOOLONG:
 148         return ENAMETOOLONG;
 149     case WSAENOTEMPTY:
 150         return ENOTEMPTY;
 151     case WSAEWOULDBLOCK:
 152          /* not using EWOULDBLOCK as we don't want code to have
 153           * to check both EWOULDBLOCK and EAGAIN */
 154         return EAGAIN;
 155     case WSAEINPROGRESS:
 156         return EINPROGRESS;
 157     case WSAEALREADY:
 158         return EALREADY;
 159     case WSAENOTSOCK:
 160         return ENOTSOCK;
 161     case WSAEDESTADDRREQ:
 162         return EDESTADDRREQ;
 163     case WSAEMSGSIZE:
 164         return EMSGSIZE;
 165     case WSAEPROTOTYPE:
 166         return EPROTOTYPE;
 167     case WSAENOPROTOOPT:
 168         return ENOPROTOOPT;
 169     case WSAEPROTONOSUPPORT:
 170         return EPROTONOSUPPORT;
 171     case WSAEOPNOTSUPP:
 172         return EOPNOTSUPP;
 173     case WSAEAFNOSUPPORT:
 174         return EAFNOSUPPORT;
 175     case WSAEADDRINUSE:
 176         return EADDRINUSE;
 177     case WSAEADDRNOTAVAIL:
 178         return EADDRNOTAVAIL;
 179     case WSAENETDOWN:
 180         return ENETDOWN;
 181     case WSAENETUNREACH:
 182         return ENETUNREACH;
 183     case WSAENETRESET:
 184         return ENETRESET;
 185     case WSAECONNABORTED:
 186         return ECONNABORTED;
 187     case WSAECONNRESET:
 188         return ECONNRESET;
 189     case WSAENOBUFS:
 190         return ENOBUFS;
 191     case WSAEISCONN:
 192         return EISCONN;
 193     case WSAENOTCONN:
 194         return ENOTCONN;
 195     case WSAETIMEDOUT:
 196         return ETIMEDOUT;
 197     case WSAECONNREFUSED:
 198         return ECONNREFUSED;
 199     case WSAELOOP:
 200         return ELOOP;
 201     case WSAEHOSTUNREACH:
 202         return EHOSTUNREACH;
 203     default:
 204         return EIO;
 205     }
 206 }
 207
 208 void qemu_set_block(int fd)
 209 {
 210     unsigned long opt = 0;
 211     WSAEventSelect(fd, NULL, 0);
 212     ioctlsocket(fd, FIONBIO, &opt);
 213 }
 214
 215 int qemu_try_set_nonblock(int fd)
 216 {
 217     unsigned long opt = 1;
 218     if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
 219         return -socket_error();
 220     }
 221     return 0;
 222 }
 223
 224 void qemu_set_nonblock(int fd)
 225 {
 226     (void)qemu_try_set_nonblock(fd);
 227 }
 228
 229 int socket_set_fast_reuse(int fd)
 230 {
 231     /* Enabling the reuse of an endpoint that was used by a socket still in
 232      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
 233      * fast reuse is the default and SO_REUSEADDR does strange things. So we
 234      * don't have to do anything here. More info can be found at:
 235      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
 236     return 0;
 237 }
 238
 239 int inet_aton(const char *cp, struct in_addr *ia)
 240 {
 241     uint32_t addr = inet_addr(cp);
 242     if (addr == 0xffffffff) {
 243         return 0;
 244     }
 245     ia->s_addr = addr;
 246     return 1;
 247 }
 248
 249 void qemu_set_cloexec(int fd)
 250 {
 251 }
 252
 253 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
 254 #define _W32_FT_OFFSET (116444736000000000ULL)
 255
 256 int qemu_gettimeofday(qemu_timeval *tp)
 257 {
 258   union {
 259     unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
 260     FILETIME ft;
 261   }  _now;
 262
 263   if(tp) {
 264       GetSystemTimeAsFileTime (&_now.ft);
 265       tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
 266       tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
 267   }
 268   /* Always return 0 as per Open Group Base Specifications Issue 6.
 269      Do not set errno on error.  */
 270   return 0;
 271 }
 272
 273 int qemu_get_thread_id(void)
 274 {
 275     return GetCurrentThreadId();
 276 }
 277
 278 char *
 279 qemu_get_local_state_pathname(const char *relative_pathname)
 280 {
 281     HRESULT result;
 282     char base_path[MAX_PATH+1] = "";
 283
 284     result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
 285                              /* SHGFP_TYPE_CURRENT */ 0, base_path);
 286     if (result != S_OK) {
 287         /* misconfigured environment */
 288         g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
 289         abort();
 290     }
 291     return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
 292                            relative_pathname);
 293 }
 294
 295 void qemu_set_tty_echo(int fd, bool echo)
 296 {
 297     HANDLE handle = (HANDLE)_get_osfhandle(fd);
 298     DWORD dwMode = 0;
 299
 300     if (handle == INVALID_HANDLE_VALUE) {
 301         return;
 302     }
 303
 304     GetConsoleMode(handle, &dwMode);
 305
 306     if (echo) {
 307         SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
 308     } else {
 309         SetConsoleMode(handle,
 310                        dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
 311     }
 312 }
 313
 314 static const char *exec_dir;
 315
 316 void qemu_init_exec_dir(const char *argv0)
 317 {
 318
 319     char *p;
 320     char buf[MAX_PATH];
 321     DWORD len;
 322
 323     if (exec_dir) {
 324         return;
 325     }
 326
 327     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
 328     if (len == 0) {
 329         return;
 330     }
 331
 332     buf[len] = 0;
 333     p = buf + len - 1;
 334     while (p != buf && *p != '\\') {
 335         p--;
 336     }
 337     *p = 0;
 338     if (access(buf, R_OK) == 0) {
 339         exec_dir = g_strdup(buf);
 340     } else {
 341         exec_dir = CONFIG_BINDIR;
 342     }
 343 }
 344
 345 const char *qemu_get_exec_dir(void)
 346 {
 347     return exec_dir;
 348 }
 349
 350 int getpagesize(void)
 351 {
 352     SYSTEM_INFO system_info;
 353
 354     GetSystemInfo(&system_info);
 355     return system_info.dwPageSize;
 356 }
 357
 358 void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
 359                      Error **errp)
 360 {
 361     int i;
 362     size_t pagesize = qemu_real_host_page_size;
 363
 364     memory = (memory + pagesize - 1) & -pagesize;
 365     for (i = 0; i < memory / pagesize; i++) {
 366         memset(area + pagesize * i, 0, 1);
 367     }
 368 }
 369
 370 char *qemu_get_pid_name(pid_t pid)
 371 {
 372     /* XXX Implement me */
 373     abort();
 374 }
 375
 376
 377 pid_t qemu_fork(Error **errp)
 378 {
 379     errno = ENOSYS;
 380     error_setg_errno(errp, errno,
 381                      "cannot fork child process");
 382     return -1;
 383 }
 384
 385
 386 #undef connect
 387 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
 388                       socklen_t addrlen)
 389 {
 390     int ret;
 391     ret = connect(sockfd, addr, addrlen);
 392     if (ret < 0) {
 393         if (WSAGetLastError() == WSAEWOULDBLOCK) {
 394             errno = EINPROGRESS;
 395         } else {
 396             errno = socket_error();
 397         }
 398     }
 399     return ret;
 400 }
 401
 402
 403 #undef listen
 404 int qemu_listen_wrap(int sockfd, int backlog)
 405 {
 406     int ret;
 407     ret = listen(sockfd, backlog);
 408     if (ret < 0) {
 409         errno = socket_error();
 410     }
 411     return ret;
 412 }
 413
 414
 415 #undef bind
 416 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
 417                    socklen_t addrlen)
 418 {
 419     int ret;
 420     ret = bind(sockfd, addr, addrlen);
 421     if (ret < 0) {
 422         errno = socket_error();
 423     }
 424     return ret;
 425 }
 426
 427
 428 #undef socket
 429 int qemu_socket_wrap(int domain, int type, int protocol)
 430 {
 431     int ret;
 432     ret = socket(domain, type, protocol);
 433     if (ret < 0) {
 434         errno = socket_error();
 435     }
 436     return ret;
 437 }
 438
 439
 440 #undef accept
 441 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
 442                      socklen_t *addrlen)
 443 {
 444     int ret;
 445     ret = accept(sockfd, addr, addrlen);
 446     if (ret < 0) {
 447         errno = socket_error();
 448     }
 449     return ret;
 450 }
 451
 452
 453 #undef shutdown
 454 int qemu_shutdown_wrap(int sockfd, int how)
 455 {
 456     int ret;
 457     ret = shutdown(sockfd, how);
 458     if (ret < 0) {
 459         errno = socket_error();
 460     }
 461     return ret;
 462 }
 463
 464
 465 #undef ioctlsocket
 466 int qemu_ioctlsocket_wrap(int fd, int req, void *val)
 467 {
 468     int ret;
 469     ret = ioctlsocket(fd, req, val);
 470     if (ret < 0) {
 471         errno = socket_error();
 472     }
 473     return ret;
 474 }
 475
 476
 477 #undef closesocket
 478 int qemu_closesocket_wrap(int fd)
 479 {
 480     int ret;
 481     ret = closesocket(fd);
 482     if (ret < 0) {
 483         errno = socket_error();
 484     }
 485     return ret;
 486 }
 487
 488
 489 #undef getsockopt
 490 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
 491                          void *optval, socklen_t *optlen)
 492 {
 493     int ret;
 494     ret = getsockopt(sockfd, level, optname, optval, optlen);
 495     if (ret < 0) {
 496         errno = socket_error();
 497     }
 498     return ret;
 499 }
 500
 501
 502 #undef setsockopt
 503 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
 504                          const void *optval, socklen_t optlen)
 505 {
 506     int ret;
 507     ret = setsockopt(sockfd, level, optname, optval, optlen);
 508     if (ret < 0) {
 509         errno = socket_error();
 510     }
 511     return ret;
 512 }
 513
 514
 515 #undef getpeername
 516 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
 517                           socklen_t *addrlen)
 518 {
 519     int ret;
 520     ret = getpeername(sockfd, addr, addrlen);
 521     if (ret < 0) {
 522         errno = socket_error();
 523     }
 524     return ret;
 525 }
 526
 527
 528 #undef getsockname
 529 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
 530                           socklen_t *addrlen)
 531 {
 532     int ret;
 533     ret = getsockname(sockfd, addr, addrlen);
 534     if (ret < 0) {
 535         errno = socket_error();
 536     }
 537     return ret;
 538 }
 539
 540
 541 #undef send
 542 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
 543 {
 544     int ret;
 545     ret = send(sockfd, buf, len, flags);
 546     if (ret < 0) {
 547         errno = socket_error();
 548     }
 549     return ret;
 550 }
 551
 552
 553 #undef sendto
 554 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
 555                          const struct sockaddr *addr, socklen_t addrlen)
 556 {
 557     int ret;
 558     ret = sendto(sockfd, buf, len, flags, addr, addrlen);
 559     if (ret < 0) {
 560         errno = socket_error();
 561     }
 562     return ret;
 563 }
 564
 565
 566 #undef recv
 567 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
 568 {
 569     int ret;
 570     ret = recv(sockfd, buf, len, flags);
 571     if (ret < 0) {
 572         errno = socket_error();
 573     }
 574     return ret;
 575 }
 576
 577
 578 #undef recvfrom
 579 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
 580                            struct sockaddr *addr, socklen_t *addrlen)
 581 {
 582     int ret;
 583     ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
 584     if (ret < 0) {
 585         errno = socket_error();
 586     }
 587     return ret;
 588 }
 589
 590 bool qemu_write_pidfile(const char *filename, Error **errp)
 591 {
 592     char buffer[128];
 593     int len;
 594     HANDLE file;
 595     OVERLAPPED overlap;
 596     BOOL ret;
 597     memset(&overlap, 0, sizeof(overlap));
 598
 599     file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
 600                       OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 601
 602     if (file == INVALID_HANDLE_VALUE) {
 603         error_setg(errp, "Failed to create PID file");
 604         return false;
 605     }
 606     len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid());
 607     ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
 608                     NULL, &overlap);
 609     CloseHandle(file);
 610     if (ret == 0) {
 611         error_setg(errp, "Failed to write PID file");
 612         return false;
 613     }
 614     return true;
 615 }
 616
 617 char *qemu_get_host_name(Error **errp)
 618 {
 619     wchar_t tmp[MAX_COMPUTERNAME_LENGTH + 1];
 620     DWORD size = G_N_ELEMENTS(tmp);
 621
 622     if (GetComputerNameW(tmp, &size) == 0) {
 623         error_setg_win32(errp, GetLastError(), "failed close handle");
 624         return NULL;
 625     }
 626
 627     return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL);
 628 }
 629
 630 size_t qemu_get_host_physmem(void)
 631 {
 632     MEMORYSTATUSEX statex;
 633     statex.dwLength = sizeof(statex);
 634
 635     if (GlobalMemoryStatusEx(&statex)) {
 636         return statex.ullTotalPhys;
 637     }
 638     return 0;
 639 }