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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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|
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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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static int aio_initialized = 0; |
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static void aio_signal_handler(int signum) |
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{ |
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#ifndef QEMU_TOOL
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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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#endif
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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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aio_initialized = 1;
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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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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; |
258 |
for(;;) {
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acb = *pacb; |
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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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if (!aio_initialized)
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qemu_aio_init(); |
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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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} |
306 |
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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(); |
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} |
316 |
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void qemu_aio_wait_end(void) |
318 |
{ |
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sigprocmask(SIG_SETMASK, &wait_oset, NULL);
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} |
321 |
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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; |
326 |
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acb1 = qemu_mallocz(sizeof(RawAIOCB));
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if (!acb1)
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return -1; |
330 |
acb->opaque = acb1; |
331 |
acb1->aiocb.aio_fildes = s->fd; |
332 |
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; |
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} |
336 |
|
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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; |
341 |
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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; |
348 |
first_aio = acb; |
349 |
if (aio_read(&acb1->aiocb) < 0) { |
350 |
acb1->busy = 0;
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return -errno;
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} |
353 |
return 0; |
354 |
} |
355 |
|
356 |
static int raw_aio_write(BlockDriverAIOCB *acb, int64_t sector_num, |
357 |
const uint8_t *buf, int nb_sectors) |
358 |
{ |
359 |
RawAIOCB *acb1 = acb->opaque; |
360 |
|
361 |
assert(acb1->busy == 0);
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362 |
acb1->busy = 1;
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acb1->aiocb.aio_buf = (uint8_t *)buf; |
364 |
acb1->aiocb.aio_nbytes = nb_sectors * 512;
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365 |
acb1->aiocb.aio_offset = sector_num * 512;
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366 |
acb1->next = first_aio; |
367 |
first_aio = acb; |
368 |
if (aio_write(&acb1->aiocb) < 0) { |
369 |
acb1->busy = 0;
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370 |
return -errno;
|
371 |
} |
372 |
return 0; |
373 |
} |
374 |
|
375 |
static void raw_aio_cancel(BlockDriverAIOCB *acb) |
376 |
{ |
377 |
RawAIOCB *acb1 = acb->opaque; |
378 |
int ret;
|
379 |
BlockDriverAIOCB **pacb; |
380 |
|
381 |
ret = aio_cancel(acb1->aiocb.aio_fildes, &acb1->aiocb); |
382 |
if (ret == AIO_NOTCANCELED) {
|
383 |
/* fail safe: if the aio could not be canceled, we wait for
|
384 |
it */
|
385 |
while (aio_error(&acb1->aiocb) == EINPROGRESS);
|
386 |
} |
387 |
|
388 |
/* remove the callback from the queue */
|
389 |
pacb = &first_aio; |
390 |
for(;;) {
|
391 |
if (*pacb == NULL) { |
392 |
break;
|
393 |
} else if (*pacb == acb) { |
394 |
acb1->busy = 0;
|
395 |
*pacb = acb1->next; |
396 |
break;
|
397 |
} |
398 |
acb1 = (*pacb)->opaque; |
399 |
pacb = &acb1->next; |
400 |
} |
401 |
} |
402 |
|
403 |
static void raw_aio_delete(BlockDriverAIOCB *acb) |
404 |
{ |
405 |
RawAIOCB *acb1 = acb->opaque; |
406 |
raw_aio_cancel(acb); |
407 |
qemu_free(acb1); |
408 |
} |
409 |
|
410 |
static void raw_close(BlockDriverState *bs) |
411 |
{ |
412 |
BDRVRawState *s = bs->opaque; |
413 |
close(s->fd); |
414 |
} |
415 |
|
416 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
417 |
{ |
418 |
BDRVRawState *s = bs->opaque; |
419 |
if (ftruncate(s->fd, offset) < 0) |
420 |
return -errno;
|
421 |
return 0; |
422 |
} |
423 |
|
424 |
static int64_t raw_getlength(BlockDriverState *bs)
|
425 |
{ |
426 |
BDRVRawState *s = bs->opaque; |
427 |
int fd = s->fd;
|
428 |
int64_t size; |
429 |
#ifdef _BSD
|
430 |
struct stat sb;
|
431 |
#endif
|
432 |
#ifdef __sun__
|
433 |
struct dk_minfo minfo;
|
434 |
int rv;
|
435 |
#endif
|
436 |
|
437 |
#ifdef _BSD
|
438 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
439 |
#ifdef DIOCGMEDIASIZE
|
440 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
441 |
#endif
|
442 |
#ifdef CONFIG_COCOA
|
443 |
size = LONG_LONG_MAX; |
444 |
#else
|
445 |
size = lseek(fd, 0LL, SEEK_END);
|
446 |
#endif
|
447 |
} else
|
448 |
#endif
|
449 |
#ifdef __sun__
|
450 |
/*
|
451 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
452 |
*/
|
453 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
454 |
if ( rv != -1 ) { |
455 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
456 |
} else /* there are reports that lseek on some devices |
457 |
fails, but irc discussion said that contingency
|
458 |
on contingency was overkill */
|
459 |
#endif
|
460 |
{ |
461 |
size = lseek(fd, 0, SEEK_END);
|
462 |
} |
463 |
#ifdef _WIN32
|
464 |
/* On Windows hosts it can happen that we're unable to get file size
|
465 |
for CD-ROM raw device (it's inherent limitation of the CDFS driver). */
|
466 |
if (size == -1) |
467 |
size = LONG_LONG_MAX; |
468 |
#endif
|
469 |
return size;
|
470 |
} |
471 |
|
472 |
static int raw_create(const char *filename, int64_t total_size, |
473 |
const char *backing_file, int flags) |
474 |
{ |
475 |
int fd;
|
476 |
|
477 |
if (flags || backing_file)
|
478 |
return -ENOTSUP;
|
479 |
|
480 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, |
481 |
0644);
|
482 |
if (fd < 0) |
483 |
return -EIO;
|
484 |
ftruncate(fd, total_size * 512);
|
485 |
close(fd); |
486 |
return 0; |
487 |
} |
488 |
|
489 |
static void raw_flush(BlockDriverState *bs) |
490 |
{ |
491 |
BDRVRawState *s = bs->opaque; |
492 |
fsync(s->fd); |
493 |
} |
494 |
|
495 |
BlockDriver bdrv_raw = { |
496 |
"raw",
|
497 |
sizeof(BDRVRawState),
|
498 |
NULL, /* no probe for protocols */ |
499 |
raw_open, |
500 |
NULL,
|
501 |
NULL,
|
502 |
raw_close, |
503 |
raw_create, |
504 |
raw_flush, |
505 |
|
506 |
.bdrv_aio_new = raw_aio_new, |
507 |
.bdrv_aio_read = raw_aio_read, |
508 |
.bdrv_aio_write = raw_aio_write, |
509 |
.bdrv_aio_cancel = raw_aio_cancel, |
510 |
.bdrv_aio_delete = raw_aio_delete, |
511 |
.protocol_name = "file",
|
512 |
.bdrv_pread = raw_pread, |
513 |
.bdrv_pwrite = raw_pwrite, |
514 |
.bdrv_truncate = raw_truncate, |
515 |
.bdrv_getlength = raw_getlength, |
516 |
}; |
517 |
|
518 |
#else /* _WIN32 */ |
519 |
|
520 |
/* XXX: use another file ? */
|
521 |
#include <windows.h> |
522 |
#include <winioctl.h> |
523 |
|
524 |
typedef struct BDRVRawState { |
525 |
HANDLE hfile; |
526 |
} BDRVRawState; |
527 |
|
528 |
typedef struct RawAIOCB { |
529 |
HANDLE hEvent; |
530 |
OVERLAPPED ov; |
531 |
int count;
|
532 |
} RawAIOCB; |
533 |
|
534 |
int qemu_ftruncate64(int fd, int64_t length) |
535 |
{ |
536 |
LARGE_INTEGER li; |
537 |
LONG high; |
538 |
HANDLE h; |
539 |
BOOL res; |
540 |
|
541 |
if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0) |
542 |
return -1; |
543 |
|
544 |
h = (HANDLE)_get_osfhandle(fd); |
545 |
|
546 |
/* get current position, ftruncate do not change position */
|
547 |
li.HighPart = 0;
|
548 |
li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
|
549 |
if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR) |
550 |
return -1; |
551 |
|
552 |
high = length >> 32;
|
553 |
if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
|
554 |
return -1; |
555 |
res = SetEndOfFile(h); |
556 |
|
557 |
/* back to old position */
|
558 |
SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN); |
559 |
return res ? 0 : -1; |
560 |
} |
561 |
|
562 |
static int set_sparse(int fd) |
563 |
{ |
564 |
DWORD returned; |
565 |
return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE, |
566 |
NULL, 0, NULL, 0, &returned, NULL); |
567 |
} |
568 |
|
569 |
static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
570 |
{ |
571 |
BDRVRawState *s = bs->opaque; |
572 |
int access_flags, create_flags;
|
573 |
|
574 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
575 |
access_flags = GENERIC_READ | GENERIC_WRITE; |
576 |
} else {
|
577 |
access_flags = GENERIC_READ; |
578 |
} |
579 |
if (flags & BDRV_O_CREAT) {
|
580 |
create_flags = CREATE_ALWAYS; |
581 |
} else {
|
582 |
create_flags = OPEN_EXISTING; |
583 |
} |
584 |
s->hfile = CreateFile(filename, access_flags, |
585 |
FILE_SHARE_READ, NULL,
|
586 |
create_flags, FILE_FLAG_OVERLAPPED, 0);
|
587 |
if (s->hfile == INVALID_HANDLE_VALUE)
|
588 |
return -1; |
589 |
return 0; |
590 |
} |
591 |
|
592 |
static int raw_pread(BlockDriverState *bs, int64_t offset, |
593 |
uint8_t *buf, int count)
|
594 |
{ |
595 |
BDRVRawState *s = bs->opaque; |
596 |
OVERLAPPED ov; |
597 |
DWORD ret_count; |
598 |
int ret;
|
599 |
|
600 |
memset(&ov, 0, sizeof(ov)); |
601 |
ov.Offset = offset; |
602 |
ov.OffsetHigh = offset >> 32;
|
603 |
ret = ReadFile(s->hfile, buf, count, NULL, &ov);
|
604 |
if (!ret)
|
605 |
return -EIO;
|
606 |
ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE); |
607 |
if (!ret)
|
608 |
return -EIO;
|
609 |
return ret_count;
|
610 |
} |
611 |
|
612 |
static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
613 |
const uint8_t *buf, int count) |
614 |
{ |
615 |
BDRVRawState *s = bs->opaque; |
616 |
OVERLAPPED ov; |
617 |
DWORD ret_count; |
618 |
int ret;
|
619 |
|
620 |
memset(&ov, 0, sizeof(ov)); |
621 |
ov.Offset = offset; |
622 |
ov.OffsetHigh = offset >> 32;
|
623 |
ret = WriteFile(s->hfile, buf, count, NULL, &ov);
|
624 |
if (!ret)
|
625 |
return -EIO;
|
626 |
ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE); |
627 |
if (!ret)
|
628 |
return -EIO;
|
629 |
return ret_count;
|
630 |
} |
631 |
|
632 |
static int raw_aio_new(BlockDriverAIOCB *acb) |
633 |
{ |
634 |
RawAIOCB *acb1; |
635 |
BDRVRawState *s = acb->bs->opaque; |
636 |
|
637 |
acb1 = qemu_mallocz(sizeof(RawAIOCB));
|
638 |
if (!acb1)
|
639 |
return -ENOMEM;
|
640 |
acb->opaque = acb1; |
641 |
s->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); |
642 |
if (!s->hEvent)
|
643 |
return -ENOMEM;
|
644 |
return 0; |
645 |
} |
646 |
|
647 |
static void raw_aio_cb(void *opaque) |
648 |
{ |
649 |
BlockDriverAIOCB *acb = opaque; |
650 |
BlockDriverState *bs = acb->bs; |
651 |
BDRVRawState *s = bs->opaque; |
652 |
RawAIOCB *acb1 = acb->opaque; |
653 |
DWORD ret_count; |
654 |
int ret;
|
655 |
|
656 |
ret = GetOverlappedResult(s->hfile, &acb1->ov, &ret_count, TRUE); |
657 |
if (!ret || ret_count != acb1->count) {
|
658 |
acb->cb(acb->cb_opaque, -EIO); |
659 |
} else {
|
660 |
acb->cb(acb->cb_opaque, 0);
|
661 |
} |
662 |
} |
663 |
|
664 |
static int raw_aio_read(BlockDriverAIOCB *acb, int64_t sector_num, |
665 |
uint8_t *buf, int nb_sectors)
|
666 |
{ |
667 |
BlockDriverState *bs = acb->bs; |
668 |
BDRVRawState *s = bs->opaque; |
669 |
RawAIOCB *acb1 = acb->opaque; |
670 |
int ret;
|
671 |
int64_t offset; |
672 |
|
673 |
memset(&acb1->ov, 0, sizeof(acb1->ov)); |
674 |
offset = sector_num * 512;
|
675 |
acb1->ov.Offset = offset; |
676 |
acb1->ov.OffsetHigh = offset >> 32;
|
677 |
acb1->ov.hEvent = acb1->hEvent; |
678 |
acb1->count = nb_sectors * 512;
|
679 |
qemu_add_wait_object(acb1->ov.hEvent, raw_aio_cb, acb); |
680 |
ret = ReadFile(s->hfile, buf, acb1->count, NULL, &acb1->ov);
|
681 |
if (!ret)
|
682 |
return -EIO;
|
683 |
return 0; |
684 |
} |
685 |
|
686 |
static int raw_aio_write(BlockDriverAIOCB *acb, int64_t sector_num, |
687 |
uint8_t *buf, int nb_sectors)
|
688 |
{ |
689 |
BlockDriverState *bs = acb->bs; |
690 |
BDRVRawState *s = bs->opaque; |
691 |
RawAIOCB *acb1 = acb->opaque; |
692 |
int ret;
|
693 |
int64_t offset; |
694 |
|
695 |
memset(&acb1->ov, 0, sizeof(acb1->ov)); |
696 |
offset = sector_num * 512;
|
697 |
acb1->ov.Offset = offset; |
698 |
acb1->ov.OffsetHigh = offset >> 32;
|
699 |
acb1->ov.hEvent = acb1->hEvent; |
700 |
acb1->count = nb_sectors * 512;
|
701 |
qemu_add_wait_object(acb1->ov.hEvent, raw_aio_cb, acb); |
702 |
ret = ReadFile(s->hfile, buf, acb1->count, NULL, &acb1->ov);
|
703 |
if (!ret)
|
704 |
return -EIO;
|
705 |
return 0; |
706 |
} |
707 |
|
708 |
static void raw_aio_cancel(BlockDriverAIOCB *acb) |
709 |
{ |
710 |
BlockDriverState *bs = acb->bs; |
711 |
BDRVRawState *s = bs->opaque; |
712 |
RawAIOCB *acb1 = acb->opaque; |
713 |
|
714 |
qemu_del_wait_object(acb1->ov.hEvent, raw_aio_cb, acb); |
715 |
/* XXX: if more than one async I/O it is not correct */
|
716 |
CancelIo(s->hfile); |
717 |
} |
718 |
|
719 |
static void raw_aio_delete(BlockDriverAIOCB *acb) |
720 |
{ |
721 |
RawAIOCB *acb1 = acb->opaque; |
722 |
raw_aio_cancel(acb); |
723 |
CloseHandle(acb1->hEvent); |
724 |
qemu_free(acb1); |
725 |
} |
726 |
|
727 |
static void raw_flush(BlockDriverState *bs) |
728 |
{ |
729 |
/* XXX: add it */
|
730 |
} |
731 |
|
732 |
static void raw_close(BlockDriverState *bs) |
733 |
{ |
734 |
BDRVRawState *s = bs->opaque; |
735 |
CloseHandle(s->hfile); |
736 |
} |
737 |
|
738 |
static int raw_truncate(BlockDriverState *bs, int64_t offset) |
739 |
{ |
740 |
BDRVRawState *s = bs->opaque; |
741 |
DWORD low, high; |
742 |
|
743 |
low = offset; |
744 |
high = offset >> 32;
|
745 |
if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
|
746 |
return -EIO;
|
747 |
if (!SetEndOfFile(s->hfile))
|
748 |
return -EIO;
|
749 |
return 0; |
750 |
} |
751 |
|
752 |
static int64_t raw_getlength(BlockDriverState *bs)
|
753 |
{ |
754 |
BDRVRawState *s = bs->opaque; |
755 |
LARGE_INTEGER l; |
756 |
if (!GetFileSizeEx(s->hfile, &l))
|
757 |
return -EIO;
|
758 |
return l.QuadPart;
|
759 |
} |
760 |
|
761 |
static int raw_create(const char *filename, int64_t total_size, |
762 |
const char *backing_file, int flags) |
763 |
{ |
764 |
int fd;
|
765 |
|
766 |
if (flags || backing_file)
|
767 |
return -ENOTSUP;
|
768 |
|
769 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
770 |
0644);
|
771 |
if (fd < 0) |
772 |
return -EIO;
|
773 |
set_sparse(fd); |
774 |
ftruncate(fd, total_size * 512);
|
775 |
close(fd); |
776 |
return 0; |
777 |
} |
778 |
|
779 |
void qemu_aio_init(void) |
780 |
{ |
781 |
} |
782 |
|
783 |
void qemu_aio_poll(void) |
784 |
{ |
785 |
} |
786 |
|
787 |
void qemu_aio_wait_start(void) |
788 |
{ |
789 |
} |
790 |
|
791 |
void qemu_aio_wait(void) |
792 |
{ |
793 |
} |
794 |
|
795 |
void qemu_aio_wait_end(void) |
796 |
{ |
797 |
} |
798 |
|
799 |
BlockDriver bdrv_raw = { |
800 |
"raw",
|
801 |
sizeof(BDRVRawState),
|
802 |
NULL, /* no probe for protocols */ |
803 |
raw_open, |
804 |
NULL,
|
805 |
NULL,
|
806 |
raw_close, |
807 |
raw_create, |
808 |
raw_flush, |
809 |
|
810 |
#if 0
|
811 |
.bdrv_aio_new = raw_aio_new,
|
812 |
.bdrv_aio_read = raw_aio_read,
|
813 |
.bdrv_aio_write = raw_aio_write,
|
814 |
.bdrv_aio_cancel = raw_aio_cancel,
|
815 |
.bdrv_aio_delete = raw_aio_delete,
|
816 |
#endif
|
817 |
.protocol_name = "file",
|
818 |
.bdrv_pread = raw_pread, |
819 |
.bdrv_pwrite = raw_pwrite, |
820 |
.bdrv_truncate = raw_truncate, |
821 |
.bdrv_getlength = raw_getlength, |
822 |
}; |
823 |
#endif /* _WIN32 */ |