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/*
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* QEMU System Emulator block driver
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*
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* Copyright (c) 2003 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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|
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#ifdef _BSD
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/ioctl.h> |
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#include <sys/queue.h> |
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#include <sys/disk.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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|
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static BlockDriverState *bdrv_first;
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static BlockDriver *first_drv;
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|
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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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|
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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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|
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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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|
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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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|
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#endif
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void bdrv_register(BlockDriver *bdrv)
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{ |
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bdrv->next = first_drv; |
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first_drv = bdrv; |
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} |
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|
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/* create a new block device (by default it is empty) */
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BlockDriverState *bdrv_new(const char *device_name) |
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{ |
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BlockDriverState **pbs, *bs; |
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|
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bs = qemu_mallocz(sizeof(BlockDriverState));
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if(!bs)
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return NULL; |
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pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
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if (device_name[0] != '\0') { |
128 |
/* insert at the end */
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pbs = &bdrv_first; |
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while (*pbs != NULL) |
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pbs = &(*pbs)->next; |
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*pbs = bs; |
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} |
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return bs;
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} |
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BlockDriver *bdrv_find_format(const char *format_name) |
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{ |
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BlockDriver *drv1; |
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for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
141 |
if (!strcmp(drv1->format_name, format_name))
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return drv1;
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} |
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return NULL; |
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} |
146 |
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int bdrv_create(BlockDriver *drv,
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const char *filename, int64_t size_in_sectors, |
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const char *backing_file, int flags) |
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{ |
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if (!drv->bdrv_create)
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return -ENOTSUP;
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return drv->bdrv_create(filename, size_in_sectors, backing_file, flags);
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} |
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#ifdef _WIN32
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void get_tmp_filename(char *filename, int size) |
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{ |
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char* p = strrchr(filename, '/'); |
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if (p == NULL) |
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return;
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/* XXX: find a better function */
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tmpnam(p); |
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*p = '/';
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} |
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#else
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void get_tmp_filename(char *filename, int size) |
170 |
{ |
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int fd;
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/* XXX: race condition possible */
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pstrcpy(filename, size, "/tmp/vl.XXXXXX");
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fd = mkstemp(filename); |
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close(fd); |
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} |
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#endif
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/* XXX: force raw format if block or character device ? It would
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simplify the BSD case */
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static BlockDriver *find_image_format(const char *filename) |
182 |
{ |
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int fd, ret, score, score_max;
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BlockDriver *drv1, *drv; |
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uint8_t *buf; |
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size_t bufsize = 1024;
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fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE); |
189 |
if (fd < 0) { |
190 |
buf = NULL;
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ret = 0;
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} else {
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#ifdef DIOCGSECTORSIZE
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{ |
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unsigned int sectorsize = 512; |
196 |
if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
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sectorsize > bufsize) |
198 |
bufsize = sectorsize; |
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} |
200 |
#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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buf = qemu_malloc(bufsize); |
208 |
if (!buf)
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return NULL; |
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ret = read(fd, buf, bufsize); |
211 |
if (ret < 0) { |
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close(fd); |
213 |
qemu_free(buf); |
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return NULL; |
215 |
} |
216 |
close(fd); |
217 |
} |
218 |
|
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drv = NULL;
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score_max = 0;
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for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
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score = drv1->bdrv_probe(buf, ret, filename); |
223 |
if (score > score_max) {
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score_max = score; |
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drv = drv1; |
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} |
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} |
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qemu_free(buf); |
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return drv;
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} |
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int bdrv_open(BlockDriverState *bs, const char *filename, int snapshot) |
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{ |
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#ifdef CONFIG_COCOA
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if ( strncmp( filename, "/dev/cdrom", 10 ) == 0 ) { |
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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); |
248 |
if (fd < 0) { |
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bsdPath[strlen(bsdPath)-1] = '1'; |
250 |
} else {
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close(fd); |
252 |
} |
253 |
filename = bsdPath; |
254 |
} |
255 |
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if ( mediaIterator )
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IOObjectRelease( mediaIterator ); |
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} |
259 |
#endif
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return bdrv_open2(bs, filename, snapshot, NULL); |
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} |
262 |
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int bdrv_open2(BlockDriverState *bs, const char *filename, int snapshot, |
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BlockDriver *drv) |
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{ |
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int ret;
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char tmp_filename[1024]; |
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bs->read_only = 0;
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bs->is_temporary = 0;
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bs->encrypted = 0;
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if (snapshot) {
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BlockDriverState *bs1; |
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int64_t total_size; |
276 |
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/* if snapshot, we create a temporary backing file and open it
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instead of opening 'filename' directly */
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280 |
/* if there is a backing file, use it */
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bs1 = bdrv_new("");
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if (!bs1) {
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return -1; |
284 |
} |
285 |
if (bdrv_open(bs1, filename, 0) < 0) { |
286 |
bdrv_delete(bs1); |
287 |
return -1; |
288 |
} |
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total_size = bs1->total_sectors; |
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bdrv_delete(bs1); |
291 |
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get_tmp_filename(tmp_filename, sizeof(tmp_filename));
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/* XXX: use cow for linux as it is more efficient ? */
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if (bdrv_create(&bdrv_qcow, tmp_filename,
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total_size, filename, 0) < 0) { |
296 |
return -1; |
297 |
} |
298 |
filename = tmp_filename; |
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bs->is_temporary = 1;
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} |
301 |
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pstrcpy(bs->filename, sizeof(bs->filename), filename);
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if (!drv) {
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drv = find_image_format(filename); |
305 |
if (!drv)
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return -1; |
307 |
} |
308 |
bs->drv = drv; |
309 |
bs->opaque = qemu_mallocz(drv->instance_size); |
310 |
if (bs->opaque == NULL && drv->instance_size > 0) |
311 |
return -1; |
312 |
|
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ret = drv->bdrv_open(bs, filename); |
314 |
if (ret < 0) { |
315 |
qemu_free(bs->opaque); |
316 |
return -1; |
317 |
} |
318 |
#ifndef _WIN32
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319 |
if (bs->is_temporary) {
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unlink(filename); |
321 |
} |
322 |
#endif
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323 |
if (bs->backing_file[0] != '\0' && drv->bdrv_is_allocated) { |
324 |
/* if there is a backing file, use it */
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bs->backing_hd = bdrv_new("");
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326 |
if (!bs->backing_hd) {
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327 |
fail:
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328 |
bdrv_close(bs); |
329 |
return -1; |
330 |
} |
331 |
if (bdrv_open(bs->backing_hd, bs->backing_file, 0) < 0) |
332 |
goto fail;
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333 |
} |
334 |
|
335 |
bs->inserted = 1;
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336 |
|
337 |
/* call the change callback */
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338 |
if (bs->change_cb)
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bs->change_cb(bs->change_opaque); |
340 |
|
341 |
return 0; |
342 |
} |
343 |
|
344 |
void bdrv_close(BlockDriverState *bs)
|
345 |
{ |
346 |
if (bs->inserted) {
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347 |
if (bs->backing_hd)
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348 |
bdrv_delete(bs->backing_hd); |
349 |
bs->drv->bdrv_close(bs); |
350 |
qemu_free(bs->opaque); |
351 |
#ifdef _WIN32
|
352 |
if (bs->is_temporary) {
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353 |
unlink(bs->filename); |
354 |
} |
355 |
#endif
|
356 |
bs->opaque = NULL;
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357 |
bs->drv = NULL;
|
358 |
bs->inserted = 0;
|
359 |
|
360 |
/* call the change callback */
|
361 |
if (bs->change_cb)
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362 |
bs->change_cb(bs->change_opaque); |
363 |
} |
364 |
} |
365 |
|
366 |
void bdrv_delete(BlockDriverState *bs)
|
367 |
{ |
368 |
/* XXX: remove the driver list */
|
369 |
bdrv_close(bs); |
370 |
qemu_free(bs); |
371 |
} |
372 |
|
373 |
/* commit COW file into the raw image */
|
374 |
int bdrv_commit(BlockDriverState *bs)
|
375 |
{ |
376 |
int64_t i; |
377 |
int n, j;
|
378 |
unsigned char sector[512]; |
379 |
|
380 |
if (!bs->inserted)
|
381 |
return -ENOENT;
|
382 |
|
383 |
if (bs->read_only) {
|
384 |
return -EACCES;
|
385 |
} |
386 |
|
387 |
if (!bs->backing_hd) {
|
388 |
return -ENOTSUP;
|
389 |
} |
390 |
|
391 |
for (i = 0; i < bs->total_sectors;) { |
392 |
if (bs->drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
393 |
for(j = 0; j < n; j++) { |
394 |
if (bdrv_read(bs, i, sector, 1) != 0) { |
395 |
return -EIO;
|
396 |
} |
397 |
|
398 |
if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
399 |
return -EIO;
|
400 |
} |
401 |
i++; |
402 |
} |
403 |
} else {
|
404 |
i += n; |
405 |
} |
406 |
} |
407 |
|
408 |
if (bs->drv->bdrv_make_empty)
|
409 |
return bs->drv->bdrv_make_empty(bs);
|
410 |
|
411 |
return 0; |
412 |
} |
413 |
|
414 |
/* return -1 if error */
|
415 |
int bdrv_read(BlockDriverState *bs, int64_t sector_num,
|
416 |
uint8_t *buf, int nb_sectors)
|
417 |
{ |
418 |
int ret, n;
|
419 |
BlockDriver *drv = bs->drv; |
420 |
|
421 |
if (!bs->inserted)
|
422 |
return -1; |
423 |
|
424 |
while (nb_sectors > 0) { |
425 |
if (sector_num == 0 && bs->boot_sector_enabled) { |
426 |
memcpy(buf, bs->boot_sector_data, 512);
|
427 |
n = 1;
|
428 |
} else if (bs->backing_hd) { |
429 |
if (drv->bdrv_is_allocated(bs, sector_num, nb_sectors, &n)) {
|
430 |
ret = drv->bdrv_read(bs, sector_num, buf, n); |
431 |
if (ret < 0) |
432 |
return -1; |
433 |
} else {
|
434 |
/* read from the base image */
|
435 |
ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
436 |
if (ret < 0) |
437 |
return -1; |
438 |
} |
439 |
} else {
|
440 |
ret = drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
441 |
if (ret < 0) |
442 |
return -1; |
443 |
/* no need to loop */
|
444 |
break;
|
445 |
} |
446 |
nb_sectors -= n; |
447 |
sector_num += n; |
448 |
buf += n * 512;
|
449 |
} |
450 |
return 0; |
451 |
} |
452 |
|
453 |
/* return -1 if error */
|
454 |
int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
455 |
const uint8_t *buf, int nb_sectors) |
456 |
{ |
457 |
if (!bs->inserted)
|
458 |
return -1; |
459 |
if (bs->read_only)
|
460 |
return -1; |
461 |
if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
462 |
memcpy(bs->boot_sector_data, buf, 512);
|
463 |
} |
464 |
return bs->drv->bdrv_write(bs, sector_num, buf, nb_sectors);
|
465 |
} |
466 |
|
467 |
void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr)
|
468 |
{ |
469 |
*nb_sectors_ptr = bs->total_sectors; |
470 |
} |
471 |
|
472 |
/* force a given boot sector. */
|
473 |
void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size) |
474 |
{ |
475 |
bs->boot_sector_enabled = 1;
|
476 |
if (size > 512) |
477 |
size = 512;
|
478 |
memcpy(bs->boot_sector_data, data, size); |
479 |
memset(bs->boot_sector_data + size, 0, 512 - size); |
480 |
} |
481 |
|
482 |
void bdrv_set_geometry_hint(BlockDriverState *bs,
|
483 |
int cyls, int heads, int secs) |
484 |
{ |
485 |
bs->cyls = cyls; |
486 |
bs->heads = heads; |
487 |
bs->secs = secs; |
488 |
} |
489 |
|
490 |
void bdrv_set_type_hint(BlockDriverState *bs, int type) |
491 |
{ |
492 |
bs->type = type; |
493 |
bs->removable = ((type == BDRV_TYPE_CDROM || |
494 |
type == BDRV_TYPE_FLOPPY)); |
495 |
} |
496 |
|
497 |
void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
498 |
{ |
499 |
bs->translation = translation; |
500 |
} |
501 |
|
502 |
void bdrv_get_geometry_hint(BlockDriverState *bs,
|
503 |
int *pcyls, int *pheads, int *psecs) |
504 |
{ |
505 |
*pcyls = bs->cyls; |
506 |
*pheads = bs->heads; |
507 |
*psecs = bs->secs; |
508 |
} |
509 |
|
510 |
int bdrv_get_type_hint(BlockDriverState *bs)
|
511 |
{ |
512 |
return bs->type;
|
513 |
} |
514 |
|
515 |
int bdrv_get_translation_hint(BlockDriverState *bs)
|
516 |
{ |
517 |
return bs->translation;
|
518 |
} |
519 |
|
520 |
int bdrv_is_removable(BlockDriverState *bs)
|
521 |
{ |
522 |
return bs->removable;
|
523 |
} |
524 |
|
525 |
int bdrv_is_read_only(BlockDriverState *bs)
|
526 |
{ |
527 |
return bs->read_only;
|
528 |
} |
529 |
|
530 |
int bdrv_is_inserted(BlockDriverState *bs)
|
531 |
{ |
532 |
return bs->inserted;
|
533 |
} |
534 |
|
535 |
int bdrv_is_locked(BlockDriverState *bs)
|
536 |
{ |
537 |
return bs->locked;
|
538 |
} |
539 |
|
540 |
void bdrv_set_locked(BlockDriverState *bs, int locked) |
541 |
{ |
542 |
bs->locked = locked; |
543 |
} |
544 |
|
545 |
void bdrv_set_change_cb(BlockDriverState *bs,
|
546 |
void (*change_cb)(void *opaque), void *opaque) |
547 |
{ |
548 |
bs->change_cb = change_cb; |
549 |
bs->change_opaque = opaque; |
550 |
} |
551 |
|
552 |
int bdrv_is_encrypted(BlockDriverState *bs)
|
553 |
{ |
554 |
if (bs->backing_hd && bs->backing_hd->encrypted)
|
555 |
return 1; |
556 |
return bs->encrypted;
|
557 |
} |
558 |
|
559 |
int bdrv_set_key(BlockDriverState *bs, const char *key) |
560 |
{ |
561 |
int ret;
|
562 |
if (bs->backing_hd && bs->backing_hd->encrypted) {
|
563 |
ret = bdrv_set_key(bs->backing_hd, key); |
564 |
if (ret < 0) |
565 |
return ret;
|
566 |
if (!bs->encrypted)
|
567 |
return 0; |
568 |
} |
569 |
if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
|
570 |
return -1; |
571 |
return bs->drv->bdrv_set_key(bs, key);
|
572 |
} |
573 |
|
574 |
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
575 |
{ |
576 |
if (!bs->inserted || !bs->drv) {
|
577 |
buf[0] = '\0'; |
578 |
} else {
|
579 |
pstrcpy(buf, buf_size, bs->drv->format_name); |
580 |
} |
581 |
} |
582 |
|
583 |
void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
584 |
void *opaque)
|
585 |
{ |
586 |
BlockDriver *drv; |
587 |
|
588 |
for (drv = first_drv; drv != NULL; drv = drv->next) { |
589 |
it(opaque, drv->format_name); |
590 |
} |
591 |
} |
592 |
|
593 |
BlockDriverState *bdrv_find(const char *name) |
594 |
{ |
595 |
BlockDriverState *bs; |
596 |
|
597 |
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
598 |
if (!strcmp(name, bs->device_name))
|
599 |
return bs;
|
600 |
} |
601 |
return NULL; |
602 |
} |
603 |
|
604 |
void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
605 |
{ |
606 |
BlockDriverState *bs; |
607 |
|
608 |
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
609 |
it(opaque, bs->device_name); |
610 |
} |
611 |
} |
612 |
|
613 |
const char *bdrv_get_device_name(BlockDriverState *bs) |
614 |
{ |
615 |
return bs->device_name;
|
616 |
} |
617 |
|
618 |
void bdrv_info(void) |
619 |
{ |
620 |
BlockDriverState *bs; |
621 |
|
622 |
for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
623 |
term_printf("%s:", bs->device_name);
|
624 |
term_printf(" type=");
|
625 |
switch(bs->type) {
|
626 |
case BDRV_TYPE_HD:
|
627 |
term_printf("hd");
|
628 |
break;
|
629 |
case BDRV_TYPE_CDROM:
|
630 |
term_printf("cdrom");
|
631 |
break;
|
632 |
case BDRV_TYPE_FLOPPY:
|
633 |
term_printf("floppy");
|
634 |
break;
|
635 |
} |
636 |
term_printf(" removable=%d", bs->removable);
|
637 |
if (bs->removable) {
|
638 |
term_printf(" locked=%d", bs->locked);
|
639 |
} |
640 |
if (bs->inserted) {
|
641 |
term_printf(" file=%s", bs->filename);
|
642 |
if (bs->backing_file[0] != '\0') |
643 |
term_printf(" backing_file=%s", bs->backing_file);
|
644 |
term_printf(" ro=%d", bs->read_only);
|
645 |
term_printf(" drv=%s", bs->drv->format_name);
|
646 |
if (bs->encrypted)
|
647 |
term_printf(" encrypted");
|
648 |
} else {
|
649 |
term_printf(" [not inserted]");
|
650 |
} |
651 |
term_printf("\n");
|
652 |
} |
653 |
} |
654 |
|
655 |
/**************************************************************/
|
656 |
/* RAW block driver */
|
657 |
|
658 |
typedef struct BDRVRawState { |
659 |
int fd;
|
660 |
} BDRVRawState; |
661 |
|
662 |
static int raw_probe(const uint8_t *buf, int buf_size, const char *filename) |
663 |
{ |
664 |
return 1; /* maybe */ |
665 |
} |
666 |
|
667 |
static int raw_open(BlockDriverState *bs, const char *filename) |
668 |
{ |
669 |
BDRVRawState *s = bs->opaque; |
670 |
int fd;
|
671 |
int64_t size; |
672 |
#ifdef _BSD
|
673 |
struct stat sb;
|
674 |
#endif
|
675 |
#ifdef __sun__
|
676 |
struct dk_minfo minfo;
|
677 |
int rv;
|
678 |
#endif
|
679 |
|
680 |
fd = open(filename, O_RDWR | O_BINARY | O_LARGEFILE); |
681 |
if (fd < 0) { |
682 |
fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE); |
683 |
if (fd < 0) |
684 |
return -1; |
685 |
bs->read_only = 1;
|
686 |
} |
687 |
#ifdef _BSD
|
688 |
if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
689 |
#ifdef DIOCGMEDIASIZE
|
690 |
if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
691 |
#endif
|
692 |
#ifdef CONFIG_COCOA
|
693 |
size = LONG_LONG_MAX; |
694 |
#else
|
695 |
size = lseek(fd, 0LL, SEEK_END);
|
696 |
#endif
|
697 |
} else
|
698 |
#endif
|
699 |
#ifdef __sun__
|
700 |
/*
|
701 |
* use the DKIOCGMEDIAINFO ioctl to read the size.
|
702 |
*/
|
703 |
rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo ); |
704 |
if ( rv != -1 ) { |
705 |
size = minfo.dki_lbsize * minfo.dki_capacity; |
706 |
} else /* there are reports that lseek on some devices |
707 |
fails, but irc discussion said that contingency
|
708 |
on contingency was overkill */
|
709 |
#endif
|
710 |
{ |
711 |
size = lseek(fd, 0, SEEK_END);
|
712 |
} |
713 |
#ifdef _WIN32
|
714 |
/* On Windows hosts it can happen that we're unable to get file size
|
715 |
for CD-ROM raw device (it's inherent limitation of the CDFS driver). */
|
716 |
if (size == -1) |
717 |
size = LONG_LONG_MAX; |
718 |
#endif
|
719 |
bs->total_sectors = size / 512;
|
720 |
s->fd = fd; |
721 |
return 0; |
722 |
} |
723 |
|
724 |
static int raw_read(BlockDriverState *bs, int64_t sector_num, |
725 |
uint8_t *buf, int nb_sectors)
|
726 |
{ |
727 |
BDRVRawState *s = bs->opaque; |
728 |
int ret;
|
729 |
|
730 |
lseek(s->fd, sector_num * 512, SEEK_SET);
|
731 |
ret = read(s->fd, buf, nb_sectors * 512);
|
732 |
if (ret != nb_sectors * 512) |
733 |
return -1; |
734 |
return 0; |
735 |
} |
736 |
|
737 |
static int raw_write(BlockDriverState *bs, int64_t sector_num, |
738 |
const uint8_t *buf, int nb_sectors) |
739 |
{ |
740 |
BDRVRawState *s = bs->opaque; |
741 |
int ret;
|
742 |
|
743 |
lseek(s->fd, sector_num * 512, SEEK_SET);
|
744 |
ret = write(s->fd, buf, nb_sectors * 512);
|
745 |
if (ret != nb_sectors * 512) |
746 |
return -1; |
747 |
return 0; |
748 |
} |
749 |
|
750 |
static void raw_close(BlockDriverState *bs) |
751 |
{ |
752 |
BDRVRawState *s = bs->opaque; |
753 |
close(s->fd); |
754 |
} |
755 |
|
756 |
static int raw_create(const char *filename, int64_t total_size, |
757 |
const char *backing_file, int flags) |
758 |
{ |
759 |
int fd;
|
760 |
|
761 |
if (flags || backing_file)
|
762 |
return -ENOTSUP;
|
763 |
|
764 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, |
765 |
0644);
|
766 |
if (fd < 0) |
767 |
return -EIO;
|
768 |
ftruncate(fd, total_size * 512);
|
769 |
close(fd); |
770 |
return 0; |
771 |
} |
772 |
|
773 |
BlockDriver bdrv_raw = { |
774 |
"raw",
|
775 |
sizeof(BDRVRawState),
|
776 |
raw_probe, |
777 |
raw_open, |
778 |
raw_read, |
779 |
raw_write, |
780 |
raw_close, |
781 |
raw_create, |
782 |
}; |
783 |
|
784 |
void bdrv_init(void) |
785 |
{ |
786 |
bdrv_register(&bdrv_raw); |
787 |
#ifndef _WIN32
|
788 |
bdrv_register(&bdrv_cow); |
789 |
#endif
|
790 |
bdrv_register(&bdrv_qcow); |
791 |
bdrv_register(&bdrv_vmdk); |
792 |
bdrv_register(&bdrv_cloop); |
793 |
bdrv_register(&bdrv_dmg); |
794 |
bdrv_register(&bdrv_bochs); |
795 |
bdrv_register(&bdrv_vpc); |
796 |
bdrv_register(&bdrv_vvfat); |
797 |
} |