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