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/*
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* Block driver for RAW files
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*
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* Copyright (c) 2006 Fabrice Bellard
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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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#include "vl.h" |
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#include "block_int.h" |
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#include <assert.h> |
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#ifndef _WIN32
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#include <aio.h> |
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|
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#ifndef QEMU_TOOL
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#include "exec-all.h" |
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#endif
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#ifdef CONFIG_COCOA
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#include <paths.h> |
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#include <sys/param.h> |
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#include <IOKit/IOKitLib.h> |
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#include <IOKit/IOBSD.h> |
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#include <IOKit/storage/IOMediaBSDClient.h> |
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#include <IOKit/storage/IOMedia.h> |
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#include <IOKit/storage/IOCDMedia.h> |
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//#include <IOKit/storage/IOCDTypes.h>
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#include <CoreFoundation/CoreFoundation.h> |
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#endif
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#ifdef __sun__
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#include <sys/dkio.h> |
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#endif
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typedef struct BDRVRawState { |
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int fd;
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} BDRVRawState; |
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#ifdef CONFIG_COCOA
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static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
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static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize ); |
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kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator ) |
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{ |
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kern_return_t kernResult; |
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mach_port_t masterPort; |
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CFMutableDictionaryRef classesToMatch; |
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kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort ); |
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if ( KERN_SUCCESS != kernResult ) {
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printf( "IOMasterPort returned %d\n", kernResult );
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} |
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classesToMatch = IOServiceMatching( kIOCDMediaClass ); |
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if ( classesToMatch == NULL ) { |
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printf( "IOServiceMatching returned a NULL dictionary.\n" );
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} else {
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CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue ); |
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} |
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kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator ); |
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if ( KERN_SUCCESS != kernResult )
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{ |
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printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
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} |
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return kernResult;
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} |
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kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
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{ |
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io_object_t nextMedia; |
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kern_return_t kernResult = KERN_FAILURE; |
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*bsdPath = '\0';
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nextMedia = IOIteratorNext( mediaIterator ); |
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if ( nextMedia )
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{ |
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CFTypeRef bsdPathAsCFString; |
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bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
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if ( bsdPathAsCFString ) {
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size_t devPathLength; |
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strcpy( bsdPath, _PATH_DEV ); |
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strcat( bsdPath, "r" );
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devPathLength = strlen( bsdPath ); |
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if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
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kernResult = KERN_SUCCESS; |
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} |
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CFRelease( bsdPathAsCFString ); |
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} |
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IOObjectRelease( nextMedia ); |
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} |
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return kernResult;
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} |
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#endif
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static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
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{ |
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BDRVRawState *s = bs->opaque; |
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int fd, open_flags;
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#ifdef CONFIG_COCOA
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if (strstart(filename, "/dev/cdrom", NULL)) { |
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kern_return_t kernResult; |
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io_iterator_t mediaIterator; |
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char bsdPath[ MAXPATHLEN ];
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int fd;
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kernResult = FindEjectableCDMedia( &mediaIterator ); |
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kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
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if ( bsdPath[ 0 ] != '\0' ) { |
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strcat(bsdPath,"s0");
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/* some CDs don't have a partition 0 */
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fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE); |
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if (fd < 0) { |
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bsdPath[strlen(bsdPath)-1] = '1'; |
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} else {
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close(fd); |
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} |
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filename = bsdPath; |
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} |
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if ( mediaIterator )
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IOObjectRelease( mediaIterator ); |
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} |
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#endif
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open_flags = O_BINARY; |
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if ((flags & BDRV_O_ACCESS) == O_RDWR) {
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open_flags |= O_RDWR; |
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} else {
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open_flags |= O_RDONLY; |
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bs->read_only = 1;
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} |
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if (flags & BDRV_O_CREAT)
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open_flags |= O_CREAT | O_TRUNC; |
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fd = open(filename, open_flags, 0644);
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if (fd < 0) |
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return -errno;
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s->fd = fd; |
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return 0; |
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} |
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/* XXX: use host sector size if necessary with:
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#ifdef DIOCGSECTORSIZE
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{
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unsigned int sectorsize = 512;
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if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
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sectorsize > bufsize)
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bufsize = sectorsize;
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}
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#endif
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#ifdef CONFIG_COCOA
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u_int32_t blockSize = 512;
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if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
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bufsize = blockSize;
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}
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#endif
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*/
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static int raw_pread(BlockDriverState *bs, int64_t offset, |
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uint8_t *buf, int count)
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{ |
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BDRVRawState *s = bs->opaque; |
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int ret;
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lseek(s->fd, offset, SEEK_SET); |
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ret = read(s->fd, buf, count); |
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return ret;
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} |
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static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
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const uint8_t *buf, int count) |
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{ |
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BDRVRawState *s = bs->opaque; |
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int ret;
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lseek(s->fd, offset, SEEK_SET); |
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ret = write(s->fd, buf, count); |
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return ret;
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} |
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/***********************************************************/
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/* Unix AOP using POSIX AIO */
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typedef struct RawAIOCB { |
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struct aiocb aiocb;
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int busy; /* only used for debugging */ |
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BlockDriverAIOCB *next; |
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} RawAIOCB; |
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static int aio_sig_num = SIGUSR2; |
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static BlockDriverAIOCB *first_aio; /* AIO issued */ |
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#ifndef QEMU_TOOL
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static void aio_signal_handler(int signum) |
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{ |
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CPUState *env = cpu_single_env; |
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if (env) {
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/* stop the currently executing cpu because a timer occured */
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cpu_interrupt(env, CPU_INTERRUPT_EXIT); |
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#ifdef USE_KQEMU
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if (env->kqemu_enabled) {
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kqemu_cpu_interrupt(env); |
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} |
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#endif
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} |
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} |
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void qemu_aio_init(void) |
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{ |
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struct sigaction act;
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sigfillset(&act.sa_mask); |
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act.sa_flags = 0; /* do not restart syscalls to interrupt select() */ |
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act.sa_handler = aio_signal_handler; |
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sigaction(aio_sig_num, &act, NULL);
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{ |
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/* XXX: aio thread exit seems to hang on RH 9 */
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struct aioinit ai;
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memset(&ai, 0, sizeof(ai)); |
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ai.aio_threads = 2;
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ai.aio_num = 1;
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ai.aio_idle_time = 365 * 100000; |
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aio_init(&ai); |
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} |
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} |
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#endif /* !QEMU_TOOL */ |
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void qemu_aio_poll(void) |
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{ |
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BlockDriverAIOCB *acb, **pacb; |
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RawAIOCB *acb1; |
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int ret;
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for(;;) {
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pacb = &first_aio; |
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for(;;) {
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acb = *pacb; |
257 |
if (!acb)
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goto the_end;
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acb1 = acb->opaque; |
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ret = aio_error(&acb1->aiocb); |
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if (ret == ECANCELED) {
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/* remove the request */
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acb1->busy = 0;
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*pacb = acb1->next; |
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} else if (ret != EINPROGRESS) { |
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/* end of aio */
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if (ret == 0) { |
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ret = aio_return(&acb1->aiocb); |
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if (ret == acb1->aiocb.aio_nbytes)
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ret = 0;
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else
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ret = -1;
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} else {
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ret = -ret; |
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} |
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/* remove the request */
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acb1->busy = 0;
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*pacb = acb1->next; |
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/* call the callback */
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acb->cb(acb->cb_opaque, ret); |
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break;
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} else {
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pacb = &acb1->next; |
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} |
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} |
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} |
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the_end: ;
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} |
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/* wait until at least one AIO was handled */
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static sigset_t wait_oset;
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void qemu_aio_wait_start(void) |
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{ |
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sigset_t set; |
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sigemptyset(&set); |
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sigaddset(&set, aio_sig_num); |
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sigprocmask(SIG_BLOCK, &set, &wait_oset); |
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} |
300 |
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void qemu_aio_wait(void) |
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{ |
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sigset_t set; |
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int nb_sigs;
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sigemptyset(&set); |
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sigaddset(&set, aio_sig_num); |
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sigwait(&set, &nb_sigs); |
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qemu_aio_poll(); |
309 |
} |
310 |
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void qemu_aio_wait_end(void) |
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{ |
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sigprocmask(SIG_SETMASK, &wait_oset, NULL);
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} |
315 |
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static int raw_aio_new(BlockDriverAIOCB *acb) |
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{ |
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RawAIOCB *acb1; |
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BDRVRawState *s = acb->bs->opaque; |
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acb1 = qemu_mallocz(sizeof(RawAIOCB));
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if (!acb1)
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return -1; |
324 |
acb->opaque = acb1; |
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acb1->aiocb.aio_fildes = s->fd; |
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acb1->aiocb.aio_sigevent.sigev_signo = aio_sig_num; |
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acb1->aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; |
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return 0; |
329 |
} |
330 |
|
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static int raw_aio_read(BlockDriverAIOCB *acb, int64_t sector_num, |
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uint8_t *buf, int nb_sectors)
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{ |
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RawAIOCB *acb1 = acb->opaque; |
335 |
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assert(acb1->busy == 0);
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acb1->busy = 1;
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acb1->aiocb.aio_buf = buf; |
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acb1->aiocb.aio_nbytes = nb_sectors * 512;
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acb1->aiocb.aio_offset = sector_num * 512;
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acb1->next = first_aio; |
342 |
first_aio = acb; |
343 |
if (aio_read(&acb1->aiocb) < 0) { |
344 |
acb1->busy = 0;
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return -errno;
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346 |
} |
347 |
return 0; |
348 |
} |
349 |
|
350 |
static int raw_aio_write(BlockDriverAIOCB *acb, int64_t sector_num, |
351 |
const uint8_t *buf, int nb_sectors) |
352 |
{ |
353 |
RawAIOCB *acb1 = acb->opaque; |
354 |
|
355 |
assert(acb1->busy == 0);
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356 |
acb1->busy = 1;
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357 |
acb1->aiocb.aio_buf = (uint8_t *)buf; |
358 |
acb1->aiocb.aio_nbytes = nb_sectors * 512;
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359 |
acb1->aiocb.aio_offset = sector_num * 512;
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360 |
acb1->next = first_aio; |
361 |
first_aio = acb; |
362 |
if (aio_write(&acb1->aiocb) < 0) { |
363 |
acb1->busy = 0;
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364 |
return -errno;
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365 |
} |
366 |
return 0; |
367 |
} |
368 |
|
369 |
static void raw_aio_cancel(BlockDriverAIOCB *acb) |
370 |
{ |
371 |
RawAIOCB *acb1 = acb->opaque; |
372 |
int ret;
|
373 |
BlockDriverAIOCB **pacb; |
374 |
|
375 |
ret = aio_cancel(acb1->aiocb.aio_fildes, &acb1->aiocb); |
376 |
if (ret == AIO_NOTCANCELED) {
|
377 |
/* fail safe: if the aio could not be canceled, we wait for
|
378 |
it */
|
379 |
while (aio_error(&acb1->aiocb) == EINPROGRESS);
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380 |
} |
381 |
|
382 |
/* remove the callback from the queue */
|
383 |
pacb = &first_aio; |
384 |
for(;;) {
|
385 |
if (*pacb == NULL) { |
386 |
break;
|
387 |
} else if (*pacb == acb) { |
388 |
acb1->busy = 0;
|
389 |
*pacb = acb1->next; |
390 |
break;
|
391 |
} |
392 |
acb1 = (*pacb)->opaque; |
393 |
pacb = &acb1->next; |
394 |
} |
395 |
} |
396 |
|
397 |
static void raw_aio_delete(BlockDriverAIOCB *acb) |
398 |
{ |
399 |
RawAIOCB *acb1 = acb->opaque; |
400 |
raw_aio_cancel(acb); |
401 |
qemu_free(acb1); |
402 |
} |
403 |
|
404 |
static void raw_close(BlockDriverState *bs) |
405 |
{ |
406 |
BDRVRawState *s = bs->opaque; |
407 |
close(s->fd); |
408 |
} |
409 |
|
410 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
411 |
{ |
412 |
BDRVRawState *s = bs->opaque; |
413 |
if (ftruncate(s->fd, offset) < 0) |
414 |
return -errno;
|
415 |
return 0; |
416 |
} |
417 |
|
418 |
static int64_t raw_getlength(BlockDriverState *bs)
|
419 |
{ |
420 |
BDRVRawState *s = bs->opaque; |
421 |
int fd = s->fd;
|
422 |
int64_t size; |
423 |
#ifdef _BSD
|
424 |
struct stat sb;
|
425 |
#endif
|
426 |
#ifdef __sun__
|
427 |
struct dk_minfo minfo;
|
428 |
int rv;
|
429 |
#endif
|
430 |
|
431 |
#ifdef _BSD
|
432 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
433 |
#ifdef DIOCGMEDIASIZE
|
434 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
435 |
#endif
|
436 |
#ifdef CONFIG_COCOA
|
437 |
size = LONG_LONG_MAX; |
438 |
#else
|
439 |
size = lseek(fd, 0LL, SEEK_END);
|
440 |
#endif
|
441 |
} else
|
442 |
#endif
|
443 |
#ifdef __sun__
|
444 |
/*
|
445 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
446 |
*/
|
447 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
448 |
if ( rv != -1 ) { |
449 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
450 |
} else /* there are reports that lseek on some devices |
451 |
fails, but irc discussion said that contingency
|
452 |
on contingency was overkill */
|
453 |
#endif
|
454 |
{ |
455 |
size = lseek(fd, 0, SEEK_END);
|
456 |
} |
457 |
#ifdef _WIN32
|
458 |
/* On Windows hosts it can happen that we're unable to get file size
|
459 |
for CD-ROM raw device (it's inherent limitation of the CDFS driver). */
|
460 |
if (size == -1) |
461 |
size = LONG_LONG_MAX; |
462 |
#endif
|
463 |
return size;
|
464 |
} |
465 |
|
466 |
static int raw_create(const char *filename, int64_t total_size, |
467 |
const char *backing_file, int flags) |
468 |
{ |
469 |
int fd;
|
470 |
|
471 |
if (flags || backing_file)
|
472 |
return -ENOTSUP;
|
473 |
|
474 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, |
475 |
0644);
|
476 |
if (fd < 0) |
477 |
return -EIO;
|
478 |
ftruncate(fd, total_size * 512);
|
479 |
close(fd); |
480 |
return 0; |
481 |
} |
482 |
|
483 |
static void raw_flush(BlockDriverState *bs) |
484 |
{ |
485 |
BDRVRawState *s = bs->opaque; |
486 |
fsync(s->fd); |
487 |
} |
488 |
|
489 |
BlockDriver bdrv_raw = { |
490 |
"raw",
|
491 |
sizeof(BDRVRawState),
|
492 |
NULL, /* no probe for protocols */ |
493 |
raw_open, |
494 |
NULL,
|
495 |
NULL,
|
496 |
raw_close, |
497 |
raw_create, |
498 |
raw_flush, |
499 |
|
500 |
.bdrv_aio_new = raw_aio_new, |
501 |
.bdrv_aio_read = raw_aio_read, |
502 |
.bdrv_aio_write = raw_aio_write, |
503 |
.bdrv_aio_cancel = raw_aio_cancel, |
504 |
.bdrv_aio_delete = raw_aio_delete, |
505 |
.protocol_name = "file",
|
506 |
.bdrv_pread = raw_pread, |
507 |
.bdrv_pwrite = raw_pwrite, |
508 |
.bdrv_truncate = raw_truncate, |
509 |
.bdrv_getlength = raw_getlength, |
510 |
}; |
511 |
|
512 |
#else /* _WIN32 */ |
513 |
|
514 |
/* XXX: use another file ? */
|
515 |
#include <windows.h> |
516 |
#include <winioctl.h> |
517 |
|
518 |
typedef struct BDRVRawState { |
519 |
HANDLE hfile; |
520 |
} BDRVRawState; |
521 |
|
522 |
typedef struct RawAIOCB { |
523 |
HANDLE hEvent; |
524 |
OVERLAPPED ov; |
525 |
int count;
|
526 |
} RawAIOCB; |
527 |
|
528 |
int qemu_ftruncate64(int fd, int64_t length) |
529 |
{ |
530 |
LARGE_INTEGER li; |
531 |
LONG high; |
532 |
HANDLE h; |
533 |
BOOL res; |
534 |
|
535 |
if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0) |
536 |
return -1; |
537 |
|
538 |
h = (HANDLE)_get_osfhandle(fd); |
539 |
|
540 |
/* get current position, ftruncate do not change position */
|
541 |
li.HighPart = 0;
|
542 |
li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
|
543 |
if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR) |
544 |
return -1; |
545 |
|
546 |
high = length >> 32;
|
547 |
if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
|
548 |
return -1; |
549 |
res = SetEndOfFile(h); |
550 |
|
551 |
/* back to old position */
|
552 |
SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN); |
553 |
return res ? 0 : -1; |
554 |
} |
555 |
|
556 |
static int set_sparse(int fd) |
557 |
{ |
558 |
DWORD returned; |
559 |
return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE, |
560 |
NULL, 0, NULL, 0, &returned, NULL); |
561 |
} |
562 |
|
563 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
564 |
{ |
565 |
BDRVRawState *s = bs->opaque; |
566 |
int access_flags, create_flags;
|
567 |
|
568 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
569 |
access_flags = GENERIC_READ | GENERIC_WRITE; |
570 |
} else {
|
571 |
access_flags = GENERIC_READ; |
572 |
} |
573 |
if (flags & BDRV_O_CREATE) {
|
574 |
create_flags = CREATE_ALWAYS; |
575 |
} else {
|
576 |
create_flags = OPEN_EXISTING; |
577 |
} |
578 |
s->hfile = CreateFile(filename, access_flags, |
579 |
FILE_SHARE_READ, NULL,
|
580 |
create_flags, FILE_FLAG_OVERLAPPED, 0);
|
581 |
if (s->hfile == INVALID_HANDLE_VALUE)
|
582 |
return -1; |
583 |
return 0; |
584 |
} |
585 |
|
586 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
587 |
uint8_t *buf, int count)
|
588 |
{ |
589 |
BDRVRawState *s = bs->opaque; |
590 |
OVERLAPPED ov; |
591 |
DWORD ret_count; |
592 |
int ret;
|
593 |
|
594 |
memset(&ov, 0, sizeof(ov)); |
595 |
ov.Offset = offset; |
596 |
ov.OffsetHigh = offset >> 32;
|
597 |
ret = ReadFile(s->hfile, buf, count, NULL, &ov);
|
598 |
if (!ret)
|
599 |
return -EIO;
|
600 |
ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE); |
601 |
if (!ret)
|
602 |
return -EIO;
|
603 |
return ret_count;
|
604 |
} |
605 |
|
606 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
607 |
const uint8_t *buf, int count) |
608 |
{ |
609 |
BDRVRawState *s = bs->opaque; |
610 |
OVERLAPPED ov; |
611 |
DWORD ret_count; |
612 |
int ret;
|
613 |
|
614 |
memset(&ov, 0, sizeof(ov)); |
615 |
ov.Offset = offset; |
616 |
ov.OffsetHigh = offset >> 32;
|
617 |
ret = WriteFile(s->hfile, buf, count, NULL, &ov);
|
618 |
if (!ret)
|
619 |
return -EIO;
|
620 |
ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE); |
621 |
if (!ret)
|
622 |
return -EIO;
|
623 |
return ret_count;
|
624 |
} |
625 |
|
626 |
static int raw_aio_new(BlockDriverAIOCB *acb) |
627 |
{ |
628 |
RawAIOCB *acb1; |
629 |
BDRVRawState *s = acb->bs->opaque; |
630 |
|
631 |
acb1 = qemu_mallocz(sizeof(RawAIOCB));
|
632 |
if (!acb1)
|
633 |
return -ENOMEM;
|
634 |
acb->opaque = acb1; |
635 |
s->hevent = CreateEvent(NULL, TRUE, FALSE, NULL); |
636 |
if (!s->hevent)
|
637 |
return -ENOMEM;
|
638 |
return 0; |
639 |
} |
640 |
|
641 |
static void raw_aio_cb(void *opaque) |
642 |
{ |
643 |
BlockDriverAIOCB *acb = acb1; |
644 |
RawAIOCB *acb1 = acb->opaque; |
645 |
DWORD ret_count; |
646 |
int ret;
|
647 |
|
648 |
ret = GetOverlappedResult(s->hfile, &acb1->ov, &ret_count, TRUE); |
649 |
if (!ret || ret_count != acb1->count) {
|
650 |
acb->cb(acb->cb_opaque, -EIO); |
651 |
} else {
|
652 |
acb->cb(acb->cb_opaque, 0);
|
653 |
} |
654 |
} |
655 |
|
656 |
static int raw_aio_read(BlockDriverAIOCB *acb, int64_t sector_num, |
657 |
uint8_t *buf, int nb_sectors)
|
658 |
{ |
659 |
BlockDriverState *bs = acb->bs; |
660 |
BDRVRawState *s = bs->opaque; |
661 |
RawAIOCB *acb1 = acb->opaque; |
662 |
DWORD ret_count; |
663 |
int ret;
|
664 |
int64_t offset; |
665 |
|
666 |
memset(&acb1->ov, 0, sizeof(acb1->ov)); |
667 |
offset = sector_num * 512;
|
668 |
acb1->ov.Offset = offset; |
669 |
acb1->ov.OffsetHigh = offset >> 32;
|
670 |
acb1->ov.hEvent = acb1->hEvent; |
671 |
acb1->count = nb_sectors * 512;
|
672 |
qemu_add_wait_object(acb1->ov.hEvent, raw_aio_cb, acb); |
673 |
ret = ReadFile(s->hfile, buf, acb1->count, NULL, &acb1->ov);
|
674 |
if (!ret)
|
675 |
return -EIO;
|
676 |
return 0; |
677 |
} |
678 |
|
679 |
static int raw_aio_write(BlockDriverAIOCB *acb, int64_t sector_num, |
680 |
uint8_t *buf, int nb_sectors)
|
681 |
{ |
682 |
BlockDriverState *bs = acb->bs; |
683 |
BDRVRawState *s = bs->opaque; |
684 |
RawAIOCB *acb1 = acb->opaque; |
685 |
DWORD ret_count; |
686 |
int ret;
|
687 |
int64_t offset; |
688 |
|
689 |
memset(&acb1->ov, 0, sizeof(acb1->ov)); |
690 |
offset = sector_num * 512;
|
691 |
acb1->ov.Offset = offset; |
692 |
acb1->ov.OffsetHigh = offset >> 32;
|
693 |
acb1->ov.hEvent = acb1->hEvent; |
694 |
acb1->count = nb_sectors * 512;
|
695 |
qemu_add_wait_object(acb1->ov.hEvent, raw_aio_cb, acb); |
696 |
ret = ReadFile(s->hfile, buf, acb1->count, NULL, &acb1->ov);
|
697 |
if (!ret)
|
698 |
return -EIO;
|
699 |
return 0; |
700 |
} |
701 |
|
702 |
static void raw_aio_cancel(BlockDriverAIOCB *acb) |
703 |
{ |
704 |
BlockDriverState *bs = acb->bs; |
705 |
BDRVRawState *s = bs->opaque; |
706 |
RawAIOCB *acb1 = acb->opaque; |
707 |
|
708 |
qemu_del_wait_object(acb1->ov.hEvent, raw_aio_cb, acb); |
709 |
/* XXX: if more than one async I/O it is not correct */
|
710 |
CancelIo(s->hfile); |
711 |
} |
712 |
|
713 |
static void raw_aio_delete(BlockDriverAIOCB *acb) |
714 |
{ |
715 |
RawAIOCB *acb1 = acb->opaque; |
716 |
raw_aio_cancel(acb); |
717 |
CloseHandle(acb1->hEvent); |
718 |
qemu_free(acb1); |
719 |
} |
720 |
|
721 |
static void raw_flush(BlockDriverState *bs) |
722 |
{ |
723 |
/* XXX: add it */
|
724 |
} |
725 |
|
726 |
static void raw_close(BlockDriverState *bs) |
727 |
{ |
728 |
BDRVRawState *s = bs->opaque; |
729 |
CloseHandle(s->hfile); |
730 |
} |
731 |
|
732 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
733 |
{ |
734 |
BDRVRawState *s = bs->opaque; |
735 |
DWORD low, high; |
736 |
|
737 |
low = length; |
738 |
high = length >> 32;
|
739 |
if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
|
740 |
return -EIO;
|
741 |
if (!SetEndOfFile(s->hfile))
|
742 |
return -EIO;
|
743 |
return 0; |
744 |
} |
745 |
|
746 |
static int64_t raw_getlength(BlockDriverState *bs)
|
747 |
{ |
748 |
BDRVRawState *s = bs->opaque; |
749 |
LARGE_INTEGER l; |
750 |
if (!GetFileSizeEx(s->hfile, &l))
|
751 |
return -EIO;
|
752 |
return l.QuadPart;
|
753 |
} |
754 |
|
755 |
static int raw_create(const char *filename, int64_t total_size, |
756 |
const char *backing_file, int flags) |
757 |
{ |
758 |
int fd;
|
759 |
|
760 |
if (flags || backing_file)
|
761 |
return -ENOTSUP;
|
762 |
|
763 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
764 |
0644);
|
765 |
if (fd < 0) |
766 |
return -EIO;
|
767 |
set_sparse(fd); |
768 |
ftruncate(fd, total_size * 512);
|
769 |
close(fd); |
770 |
return 0; |
771 |
} |
772 |
|
773 |
void qemu_aio_init(void) |
774 |
{ |
775 |
} |
776 |
|
777 |
void qemu_aio_poll(void) |
778 |
{ |
779 |
} |
780 |
|
781 |
void qemu_aio_wait_start(void) |
782 |
{ |
783 |
} |
784 |
|
785 |
void qemu_aio_wait(void) |
786 |
{ |
787 |
} |
788 |
|
789 |
void qemu_aio_wait_end(void) |
790 |
{ |
791 |
} |
792 |
|
793 |
BlockDriver bdrv_raw = { |
794 |
"raw",
|
795 |
sizeof(BDRVRawState),
|
796 |
NULL, /* no probe for protocols */ |
797 |
raw_open, |
798 |
NULL,
|
799 |
NULL,
|
800 |
raw_close, |
801 |
raw_create, |
802 |
raw_flush, |
803 |
|
804 |
#if 0
|
805 |
.bdrv_aio_new = raw_aio_new,
|
806 |
.bdrv_aio_read = raw_aio_read,
|
807 |
.bdrv_aio_write = raw_aio_write,
|
808 |
.bdrv_aio_cancel = raw_aio_cancel,
|
809 |
.bdrv_aio_delete = raw_aio_delete,
|
810 |
#endif
|
811 |
.protocol_name = "file",
|
812 |
.bdrv_pread = raw_pread, |
813 |
.bdrv_pwrite = raw_pwrite, |
814 |
.bdrv_truncate = raw_truncate, |
815 |
.bdrv_getlength = raw_getlength, |
816 |
}; |
817 |
#endif /* _WIN32 */ |