b16a44e13e
Now that QEMU wraps the Win32 sockets methods to automatically set errno upon failure, there is no reason for callers to use the socket_error() method. They can rely on accessing errno even on Win32. Remove all use of socket_error() from general code, leaving it as a static method in oslib-win32.c only. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
785 lines
20 KiB
C
785 lines
20 KiB
C
/*
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* os-win32.c
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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* Copyright (c) 2010-2016 Red Hat, Inc.
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*
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* QEMU library functions for win32 which are shared between QEMU and
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* the QEMU tools.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* The implementation of g_poll (functions poll_rest, g_poll) at the end of
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* this file are based on code from GNOME glib-2 and use a different license,
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* see the license comment there.
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*/
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#include "qemu/osdep.h"
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#include <windows.h>
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#include <glib.h>
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#include "sysemu/sysemu.h"
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#include "qemu/main-loop.h"
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#include "trace.h"
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#include "qemu/sockets.h"
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/* this must come after including "trace.h" */
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#include <shlobj.h>
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void *qemu_oom_check(void *ptr)
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{
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if (ptr == NULL) {
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fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
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abort();
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}
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return ptr;
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}
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void *qemu_try_memalign(size_t alignment, size_t size)
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{
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void *ptr;
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if (!size) {
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abort();
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}
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ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
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trace_qemu_memalign(alignment, size, ptr);
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return ptr;
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}
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void *qemu_memalign(size_t alignment, size_t size)
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{
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return qemu_oom_check(qemu_try_memalign(alignment, size));
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}
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void *qemu_anon_ram_alloc(size_t size, uint64_t *align)
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{
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void *ptr;
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/* FIXME: this is not exactly optimal solution since VirtualAlloc
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has 64Kb granularity, but at least it guarantees us that the
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memory is page aligned. */
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ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
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trace_qemu_anon_ram_alloc(size, ptr);
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return ptr;
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}
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void qemu_vfree(void *ptr)
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{
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trace_qemu_vfree(ptr);
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if (ptr) {
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VirtualFree(ptr, 0, MEM_RELEASE);
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}
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}
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void qemu_anon_ram_free(void *ptr, size_t size)
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{
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trace_qemu_anon_ram_free(ptr, size);
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if (ptr) {
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VirtualFree(ptr, 0, MEM_RELEASE);
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}
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}
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#ifndef CONFIG_LOCALTIME_R
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/* FIXME: add proper locking */
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struct tm *gmtime_r(const time_t *timep, struct tm *result)
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{
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struct tm *p = gmtime(timep);
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memset(result, 0, sizeof(*result));
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if (p) {
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*result = *p;
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p = result;
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}
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return p;
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}
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/* FIXME: add proper locking */
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struct tm *localtime_r(const time_t *timep, struct tm *result)
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{
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struct tm *p = localtime(timep);
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memset(result, 0, sizeof(*result));
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if (p) {
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*result = *p;
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p = result;
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}
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return p;
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}
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#endif /* CONFIG_LOCALTIME_R */
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void qemu_set_block(int fd)
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{
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unsigned long opt = 0;
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WSAEventSelect(fd, NULL, 0);
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ioctlsocket(fd, FIONBIO, &opt);
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}
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void qemu_set_nonblock(int fd)
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{
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unsigned long opt = 1;
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ioctlsocket(fd, FIONBIO, &opt);
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qemu_fd_register(fd);
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}
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int socket_set_fast_reuse(int fd)
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{
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/* Enabling the reuse of an endpoint that was used by a socket still in
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* TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
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* fast reuse is the default and SO_REUSEADDR does strange things. So we
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* don't have to do anything here. More info can be found at:
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* http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
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return 0;
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}
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static int socket_error(void)
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{
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switch (WSAGetLastError()) {
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case 0:
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return 0;
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case WSAEINTR:
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return EINTR;
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case WSAEINVAL:
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return EINVAL;
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case WSA_INVALID_HANDLE:
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return EBADF;
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case WSA_NOT_ENOUGH_MEMORY:
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return ENOMEM;
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case WSA_INVALID_PARAMETER:
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return EINVAL;
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case WSAENAMETOOLONG:
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return ENAMETOOLONG;
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case WSAENOTEMPTY:
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return ENOTEMPTY;
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case WSAEWOULDBLOCK:
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/* not using EWOULDBLOCK as we don't want code to have
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* to check both EWOULDBLOCK and EAGAIN */
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return EAGAIN;
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case WSAEINPROGRESS:
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return EINPROGRESS;
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case WSAEALREADY:
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return EALREADY;
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case WSAENOTSOCK:
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return ENOTSOCK;
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case WSAEDESTADDRREQ:
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return EDESTADDRREQ;
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case WSAEMSGSIZE:
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return EMSGSIZE;
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case WSAEPROTOTYPE:
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return EPROTOTYPE;
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case WSAENOPROTOOPT:
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return ENOPROTOOPT;
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case WSAEPROTONOSUPPORT:
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return EPROTONOSUPPORT;
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case WSAEOPNOTSUPP:
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return EOPNOTSUPP;
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case WSAEAFNOSUPPORT:
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return EAFNOSUPPORT;
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case WSAEADDRINUSE:
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return EADDRINUSE;
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case WSAEADDRNOTAVAIL:
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return EADDRNOTAVAIL;
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case WSAENETDOWN:
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return ENETDOWN;
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case WSAENETUNREACH:
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return ENETUNREACH;
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case WSAENETRESET:
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return ENETRESET;
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case WSAECONNABORTED:
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return ECONNABORTED;
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case WSAECONNRESET:
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return ECONNRESET;
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case WSAENOBUFS:
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return ENOBUFS;
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case WSAEISCONN:
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return EISCONN;
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case WSAENOTCONN:
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return ENOTCONN;
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case WSAETIMEDOUT:
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return ETIMEDOUT;
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case WSAECONNREFUSED:
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return ECONNREFUSED;
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case WSAELOOP:
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return ELOOP;
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case WSAEHOSTUNREACH:
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return EHOSTUNREACH;
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default:
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return EIO;
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}
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}
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int inet_aton(const char *cp, struct in_addr *ia)
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{
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uint32_t addr = inet_addr(cp);
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if (addr == 0xffffffff) {
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return 0;
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}
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ia->s_addr = addr;
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return 1;
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}
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void qemu_set_cloexec(int fd)
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{
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}
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/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
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#define _W32_FT_OFFSET (116444736000000000ULL)
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int qemu_gettimeofday(qemu_timeval *tp)
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{
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union {
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unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
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FILETIME ft;
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} _now;
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if(tp) {
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GetSystemTimeAsFileTime (&_now.ft);
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tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
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tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
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}
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/* Always return 0 as per Open Group Base Specifications Issue 6.
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Do not set errno on error. */
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return 0;
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}
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int qemu_get_thread_id(void)
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{
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return GetCurrentThreadId();
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}
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char *
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qemu_get_local_state_pathname(const char *relative_pathname)
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{
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HRESULT result;
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char base_path[MAX_PATH+1] = "";
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result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
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/* SHGFP_TYPE_CURRENT */ 0, base_path);
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if (result != S_OK) {
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/* misconfigured environment */
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g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
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abort();
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}
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return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
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relative_pathname);
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}
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void qemu_set_tty_echo(int fd, bool echo)
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{
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HANDLE handle = (HANDLE)_get_osfhandle(fd);
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DWORD dwMode = 0;
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if (handle == INVALID_HANDLE_VALUE) {
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return;
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}
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GetConsoleMode(handle, &dwMode);
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if (echo) {
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SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
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} else {
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SetConsoleMode(handle,
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dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
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}
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}
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static char exec_dir[PATH_MAX];
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void qemu_init_exec_dir(const char *argv0)
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{
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char *p;
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char buf[MAX_PATH];
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DWORD len;
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len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
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if (len == 0) {
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return;
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}
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buf[len] = 0;
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p = buf + len - 1;
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while (p != buf && *p != '\\') {
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p--;
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}
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*p = 0;
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if (access(buf, R_OK) == 0) {
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pstrcpy(exec_dir, sizeof(exec_dir), buf);
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}
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}
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char *qemu_get_exec_dir(void)
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{
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return g_strdup(exec_dir);
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}
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/*
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* The original implementation of g_poll from glib has a problem on Windows
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* when using timeouts < 10 ms.
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*
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* Whenever g_poll is called with timeout < 10 ms, it does a quick poll instead
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* of wait. This causes significant performance degradation of QEMU.
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*
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* The following code is a copy of the original code from glib/gpoll.c
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* (glib commit 20f4d1820b8d4d0fc4447188e33efffd6d4a88d8 from 2014-02-19).
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* Some debug code was removed and the code was reformatted.
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* All other code modifications are marked with 'QEMU'.
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*/
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/*
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* gpoll.c: poll(2) abstraction
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* Copyright 1998 Owen Taylor
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* Copyright 2008 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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static int poll_rest(gboolean poll_msgs, HANDLE *handles, gint nhandles,
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GPollFD *fds, guint nfds, gint timeout)
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{
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DWORD ready;
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GPollFD *f;
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int recursed_result;
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if (poll_msgs) {
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/* Wait for either messages or handles
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* -> Use MsgWaitForMultipleObjectsEx
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*/
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ready = MsgWaitForMultipleObjectsEx(nhandles, handles, timeout,
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QS_ALLINPUT, MWMO_ALERTABLE);
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if (ready == WAIT_FAILED) {
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gchar *emsg = g_win32_error_message(GetLastError());
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g_warning("MsgWaitForMultipleObjectsEx failed: %s", emsg);
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g_free(emsg);
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}
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} else if (nhandles == 0) {
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/* No handles to wait for, just the timeout */
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if (timeout == INFINITE) {
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ready = WAIT_FAILED;
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} else {
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SleepEx(timeout, TRUE);
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ready = WAIT_TIMEOUT;
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}
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} else {
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/* Wait for just handles
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* -> Use WaitForMultipleObjectsEx
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*/
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ready =
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WaitForMultipleObjectsEx(nhandles, handles, FALSE, timeout, TRUE);
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if (ready == WAIT_FAILED) {
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gchar *emsg = g_win32_error_message(GetLastError());
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g_warning("WaitForMultipleObjectsEx failed: %s", emsg);
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g_free(emsg);
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}
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}
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if (ready == WAIT_FAILED) {
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return -1;
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} else if (ready == WAIT_TIMEOUT || ready == WAIT_IO_COMPLETION) {
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return 0;
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} else if (poll_msgs && ready == WAIT_OBJECT_0 + nhandles) {
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for (f = fds; f < &fds[nfds]; ++f) {
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if (f->fd == G_WIN32_MSG_HANDLE && f->events & G_IO_IN) {
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f->revents |= G_IO_IN;
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}
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}
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/* If we have a timeout, or no handles to poll, be satisfied
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* with just noticing we have messages waiting.
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*/
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if (timeout != 0 || nhandles == 0) {
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return 1;
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}
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/* If no timeout and handles to poll, recurse to poll them,
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* too.
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*/
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recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
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return (recursed_result == -1) ? -1 : 1 + recursed_result;
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} else if (/* QEMU: removed the following unneeded statement which causes
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* a compiler warning: ready >= WAIT_OBJECT_0 && */
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ready < WAIT_OBJECT_0 + nhandles) {
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for (f = fds; f < &fds[nfds]; ++f) {
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if ((HANDLE) f->fd == handles[ready - WAIT_OBJECT_0]) {
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f->revents = f->events;
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}
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}
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/* If no timeout and polling several handles, recurse to poll
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* the rest of them.
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*/
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if (timeout == 0 && nhandles > 1) {
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/* Remove the handle that fired */
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int i;
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if (ready < nhandles - 1) {
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for (i = ready - WAIT_OBJECT_0 + 1; i < nhandles; i++) {
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handles[i-1] = handles[i];
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}
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}
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nhandles--;
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recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
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return (recursed_result == -1) ? -1 : 1 + recursed_result;
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}
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return 1;
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}
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return 0;
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}
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gint g_poll(GPollFD *fds, guint nfds, gint timeout)
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{
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HANDLE handles[MAXIMUM_WAIT_OBJECTS];
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gboolean poll_msgs = FALSE;
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GPollFD *f;
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gint nhandles = 0;
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int retval;
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for (f = fds; f < &fds[nfds]; ++f) {
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if (f->fd == G_WIN32_MSG_HANDLE && (f->events & G_IO_IN)) {
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poll_msgs = TRUE;
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} else if (f->fd > 0) {
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/* Don't add the same handle several times into the array, as
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* docs say that is not allowed, even if it actually does seem
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* to work.
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*/
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gint i;
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for (i = 0; i < nhandles; i++) {
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if (handles[i] == (HANDLE) f->fd) {
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break;
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}
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}
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if (i == nhandles) {
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if (nhandles == MAXIMUM_WAIT_OBJECTS) {
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g_warning("Too many handles to wait for!\n");
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break;
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} else {
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handles[nhandles++] = (HANDLE) f->fd;
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}
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}
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}
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}
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for (f = fds; f < &fds[nfds]; ++f) {
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f->revents = 0;
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}
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if (timeout == -1) {
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timeout = INFINITE;
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}
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/* Polling for several things? */
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if (nhandles > 1 || (nhandles > 0 && poll_msgs)) {
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/* First check if one or several of them are immediately
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* available
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*/
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retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, 0);
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/* If not, and we have a significant timeout, poll again with
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* timeout then. Note that this will return indication for only
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* one event, or only for messages. We ignore timeouts less than
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* ten milliseconds as they are mostly pointless on Windows, the
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* MsgWaitForMultipleObjectsEx() call will timeout right away
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* anyway.
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*
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* Modification for QEMU: replaced timeout >= 10 by timeout > 0.
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*/
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if (retval == 0 && (timeout == INFINITE || timeout > 0)) {
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retval = poll_rest(poll_msgs, handles, nhandles,
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fds, nfds, timeout);
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}
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} else {
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/* Just polling for one thing, so no need to check first if
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* available immediately
|
|
*/
|
|
retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, timeout);
|
|
}
|
|
|
|
if (retval == -1) {
|
|
for (f = fds; f < &fds[nfds]; ++f) {
|
|
f->revents = 0;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
int getpagesize(void)
|
|
{
|
|
SYSTEM_INFO system_info;
|
|
|
|
GetSystemInfo(&system_info);
|
|
return system_info.dwPageSize;
|
|
}
|
|
|
|
void os_mem_prealloc(int fd, char *area, size_t memory)
|
|
{
|
|
int i;
|
|
size_t pagesize = getpagesize();
|
|
|
|
memory = (memory + pagesize - 1) & -pagesize;
|
|
for (i = 0; i < memory / pagesize; i++) {
|
|
memset(area + pagesize * i, 0, 1);
|
|
}
|
|
}
|
|
|
|
|
|
/* XXX: put correct support for win32 */
|
|
int qemu_read_password(char *buf, int buf_size)
|
|
{
|
|
int c, i;
|
|
|
|
printf("Password: ");
|
|
fflush(stdout);
|
|
i = 0;
|
|
for (;;) {
|
|
c = getchar();
|
|
if (c < 0) {
|
|
buf[i] = '\0';
|
|
return -1;
|
|
} else if (c == '\n') {
|
|
break;
|
|
} else if (i < (buf_size - 1)) {
|
|
buf[i++] = c;
|
|
}
|
|
}
|
|
buf[i] = '\0';
|
|
return 0;
|
|
}
|
|
|
|
|
|
pid_t qemu_fork(Error **errp)
|
|
{
|
|
errno = ENOSYS;
|
|
error_setg_errno(errp, errno,
|
|
"cannot fork child process");
|
|
return -1;
|
|
}
|
|
|
|
|
|
#undef connect
|
|
int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
|
|
socklen_t addrlen)
|
|
{
|
|
int ret;
|
|
ret = connect(sockfd, addr, addrlen);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef listen
|
|
int qemu_listen_wrap(int sockfd, int backlog)
|
|
{
|
|
int ret;
|
|
ret = listen(sockfd, backlog);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef bind
|
|
int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
|
|
socklen_t addrlen)
|
|
{
|
|
int ret;
|
|
ret = bind(sockfd, addr, addrlen);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef socket
|
|
int qemu_socket_wrap(int domain, int type, int protocol)
|
|
{
|
|
int ret;
|
|
ret = socket(domain, type, protocol);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef accept
|
|
int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
|
|
socklen_t *addrlen)
|
|
{
|
|
int ret;
|
|
ret = accept(sockfd, addr, addrlen);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef shutdown
|
|
int qemu_shutdown_wrap(int sockfd, int how)
|
|
{
|
|
int ret;
|
|
ret = shutdown(sockfd, how);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef ioctlsocket
|
|
int qemu_ioctlsocket_wrap(int fd, int req, void *val)
|
|
{
|
|
int ret;
|
|
ret = ioctlsocket(fd, req, val);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef closesocket
|
|
int qemu_closesocket_wrap(int fd)
|
|
{
|
|
int ret;
|
|
ret = closesocket(fd);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef getsockopt
|
|
int qemu_getsockopt_wrap(int sockfd, int level, int optname,
|
|
void *optval, socklen_t *optlen)
|
|
{
|
|
int ret;
|
|
ret = getsockopt(sockfd, level, optname, optval, optlen);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef setsockopt
|
|
int qemu_setsockopt_wrap(int sockfd, int level, int optname,
|
|
const void *optval, socklen_t optlen)
|
|
{
|
|
int ret;
|
|
ret = setsockopt(sockfd, level, optname, optval, optlen);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef getpeername
|
|
int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
|
|
socklen_t *addrlen)
|
|
{
|
|
int ret;
|
|
ret = getpeername(sockfd, addr, addrlen);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef getsockname
|
|
int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
|
|
socklen_t *addrlen)
|
|
{
|
|
int ret;
|
|
ret = getsockname(sockfd, addr, addrlen);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef send
|
|
ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
|
|
{
|
|
int ret;
|
|
ret = send(sockfd, buf, len, flags);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef sendto
|
|
ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
|
|
const struct sockaddr *addr, socklen_t addrlen)
|
|
{
|
|
int ret;
|
|
ret = sendto(sockfd, buf, len, flags, addr, addrlen);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef recv
|
|
ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
|
|
{
|
|
int ret;
|
|
ret = recv(sockfd, buf, len, flags);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
#undef recvfrom
|
|
ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
|
|
struct sockaddr *addr, socklen_t *addrlen)
|
|
{
|
|
int ret;
|
|
ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
|
|
if (ret < 0) {
|
|
errno = socket_error();
|
|
}
|
|
return ret;
|
|
}
|