Let's introduce RAM_NORESERVE, allowing mmap'ing with MAP_NORESERVE. The new flag has the following semantics: " RAM is mmap-ed with MAP_NORESERVE. When set, reserving swap space (or huge pages if applicable) is skipped: will bail out if not supported. When not set, the OS will do the reservation, if supported for the memory type. " Allow passing it into: - memory_region_init_ram_nomigrate() - memory_region_init_resizeable_ram() - memory_region_init_ram_from_file() ... and teach qemu_ram_mmap() and qemu_anon_ram_alloc() about the flag. Bail out if the flag is not supported, which is the case right now for both, POSIX and win32. We will add Linux support next and allow specifying RAM_NORESERVE via memory backends. The target use case is virtio-mem, which dynamically exposes memory inside a large, sparse memory area to the VM. Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Acked-by: Eduardo Habkost <ehabkost@redhat.com> for memory backend and machine core Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20210510114328.21835-9-david@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
651 lines
15 KiB
C
651 lines
15 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 "qemu-common.h"
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#include "qapi/error.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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#include "qemu/cutils.h"
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#include "qemu/error-report.h"
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#include <malloc.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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g_assert(size != 0);
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g_assert(is_power_of_2(alignment));
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ptr = _aligned_malloc(size, alignment);
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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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static int get_allocation_granularity(void)
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{
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SYSTEM_INFO system_info;
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GetSystemInfo(&system_info);
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return system_info.dwAllocationGranularity;
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}
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void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared,
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bool noreserve)
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{
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void *ptr;
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if (noreserve) {
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/*
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* We need a MEM_COMMIT before accessing any memory in a MEM_RESERVE
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* area; we cannot easily mimic POSIX MAP_NORESERVE semantics.
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*/
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error_report("Skipping reservation of swap space is not supported.");
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return NULL;
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}
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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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if (ptr && align) {
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*align = MAX(get_allocation_granularity(), getpagesize());
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}
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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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_aligned_free(ptr);
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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 _POSIX_THREAD_SAFE_FUNCTIONS
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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 /* _POSIX_THREAD_SAFE_FUNCTIONS */
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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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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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int qemu_try_set_nonblock(int fd)
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{
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unsigned long opt = 1;
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if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
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return -socket_error();
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}
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return 0;
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}
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void qemu_set_nonblock(int fd)
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{
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(void)qemu_try_set_nonblock(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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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 const char *exec_dir;
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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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if (exec_dir) {
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return;
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}
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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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exec_dir = g_strdup(buf);
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} else {
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exec_dir = CONFIG_BINDIR;
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}
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}
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const char *qemu_get_exec_dir(void)
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{
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return exec_dir;
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}
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int getpagesize(void)
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{
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SYSTEM_INFO system_info;
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GetSystemInfo(&system_info);
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return system_info.dwPageSize;
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}
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void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
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Error **errp)
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{
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int i;
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size_t pagesize = qemu_real_host_page_size;
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memory = (memory + pagesize - 1) & -pagesize;
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for (i = 0; i < memory / pagesize; i++) {
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memset(area + pagesize * i, 0, 1);
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}
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}
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char *qemu_get_pid_name(pid_t pid)
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{
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/* XXX Implement me */
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abort();
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}
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pid_t qemu_fork(Error **errp)
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{
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errno = ENOSYS;
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error_setg_errno(errp, errno,
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"cannot fork child process");
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return -1;
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}
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#undef connect
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int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
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socklen_t addrlen)
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{
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int ret;
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ret = connect(sockfd, addr, addrlen);
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if (ret < 0) {
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if (WSAGetLastError() == WSAEWOULDBLOCK) {
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errno = EINPROGRESS;
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} else {
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errno = socket_error();
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}
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}
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return ret;
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}
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#undef listen
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int qemu_listen_wrap(int sockfd, int backlog)
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{
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int ret;
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ret = listen(sockfd, backlog);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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#undef bind
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int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
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socklen_t addrlen)
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{
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int ret;
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ret = bind(sockfd, addr, addrlen);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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#undef socket
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int qemu_socket_wrap(int domain, int type, int protocol)
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{
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int ret;
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ret = socket(domain, type, protocol);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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#undef accept
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int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
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socklen_t *addrlen)
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{
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int ret;
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ret = accept(sockfd, addr, addrlen);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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|
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#undef shutdown
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int qemu_shutdown_wrap(int sockfd, int how)
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{
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int ret;
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ret = shutdown(sockfd, how);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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#undef ioctlsocket
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int qemu_ioctlsocket_wrap(int fd, int req, void *val)
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{
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int ret;
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ret = ioctlsocket(fd, req, val);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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#undef closesocket
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int qemu_closesocket_wrap(int fd)
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|
{
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int ret;
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ret = closesocket(fd);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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#undef getsockopt
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int qemu_getsockopt_wrap(int sockfd, int level, int optname,
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void *optval, socklen_t *optlen)
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{
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int ret;
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ret = getsockopt(sockfd, level, optname, optval, optlen);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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|
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#undef setsockopt
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int qemu_setsockopt_wrap(int sockfd, int level, int optname,
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const void *optval, socklen_t optlen)
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|
{
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|
int ret;
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ret = setsockopt(sockfd, level, optname, optval, optlen);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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|
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#undef getpeername
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|
int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
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socklen_t *addrlen)
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|
{
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int ret;
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ret = getpeername(sockfd, addr, addrlen);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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#undef getsockname
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int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
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socklen_t *addrlen)
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{
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int ret;
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ret = getsockname(sockfd, addr, addrlen);
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if (ret < 0) {
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errno = socket_error();
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}
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return ret;
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}
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#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;
|
|
}
|
|
|
|
bool qemu_write_pidfile(const char *filename, Error **errp)
|
|
{
|
|
char buffer[128];
|
|
int len;
|
|
HANDLE file;
|
|
OVERLAPPED overlap;
|
|
BOOL ret;
|
|
memset(&overlap, 0, sizeof(overlap));
|
|
|
|
file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
|
|
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
|
|
|
|
if (file == INVALID_HANDLE_VALUE) {
|
|
error_setg(errp, "Failed to create PID file");
|
|
return false;
|
|
}
|
|
len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid());
|
|
ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
|
|
NULL, &overlap);
|
|
CloseHandle(file);
|
|
if (ret == 0) {
|
|
error_setg(errp, "Failed to write PID file");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
char *qemu_get_host_name(Error **errp)
|
|
{
|
|
wchar_t tmp[MAX_COMPUTERNAME_LENGTH + 1];
|
|
DWORD size = G_N_ELEMENTS(tmp);
|
|
|
|
if (GetComputerNameW(tmp, &size) == 0) {
|
|
error_setg_win32(errp, GetLastError(), "failed close handle");
|
|
return NULL;
|
|
}
|
|
|
|
return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL);
|
|
}
|
|
|
|
size_t qemu_get_host_physmem(void)
|
|
{
|
|
MEMORYSTATUSEX statex;
|
|
statex.dwLength = sizeof(statex);
|
|
|
|
if (GlobalMemoryStatusEx(&statex)) {
|
|
return statex.ullTotalPhys;
|
|
}
|
|
return 0;
|
|
}
|