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For non partionned media formated as FAT, set bytes per sector according

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to FAT boot sector information.
This commit is contained in:
Christophe Grenier 2011-03-05 18:48:28 +01:00
parent e41e56453b
commit 0718628eba
3 changed files with 49 additions and 34 deletions
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1
src/ewf.c
View file

@ -155,6 +155,7 @@ disk_t *fewf_init(const char *device, const arch_fnct_t *arch, const int mode)
disk->geom.cylinders=0;
disk->geom.heads_per_cylinder=1;
disk->geom.sectors_per_head=1;
disk->geom.bytes_per_sector=disk->sector_size;
/* Get disk_real_size */
#ifdef LIBEWF_GET_MEDIA_SIZE_HAVE_TWO_ARGUMENTS
{

78
src/hdaccess.c
View file

@ -1247,31 +1247,37 @@ static int file_sync(disk_t *disk_car)
#endif
}
static void autoset_geometry(disk_t * disk_car, const unsigned char *buffer, const int verbose)
static void autoset_geometry(disk_t *disk, const unsigned char *buffer, const int verbose)
{
if(disk_car->arch->get_geometry_from_mbr!=NULL)
if(disk->arch->get_geometry_from_mbr!=NULL)
{
CHSgeometry_t geometry;
geometry.cylinders=0;
geometry.heads_per_cylinder=0;
geometry.sectors_per_head=0;
disk_car->arch->get_geometry_from_mbr(buffer, verbose, &geometry);
disk_car->autodetect=1;
geometry.bytes_per_sector=0;
disk->arch->get_geometry_from_mbr(buffer, verbose, &geometry);
disk->autodetect=1;
if(geometry.sectors_per_head > 0)
{
disk_car->geom.heads_per_cylinder=geometry.heads_per_cylinder;
disk_car->geom.sectors_per_head=geometry.sectors_per_head;
disk->geom.heads_per_cylinder=geometry.heads_per_cylinder;
disk->geom.sectors_per_head=geometry.sectors_per_head;
if(geometry.bytes_per_sector!=0)
{
disk->geom.bytes_per_sector=geometry.bytes_per_sector;
disk->sector_size=geometry.bytes_per_sector;
}
}
else
{
disk_car->geom.heads_per_cylinder=255;
disk_car->geom.sectors_per_head=63;
disk->geom.heads_per_cylinder=255;
disk->geom.sectors_per_head=63;
}
}
/* Round up because file is often truncated. */
disk_car->geom.cylinders=(disk_car->disk_size / disk_car->sector_size +
(uint64_t)disk_car->geom.sectors_per_head * disk_car->geom.heads_per_cylinder - 1) /
disk_car->geom.sectors_per_head / disk_car->geom.heads_per_cylinder;
disk->geom.cylinders=(disk->disk_size / disk->sector_size +
(uint64_t)disk->geom.sectors_per_head * disk->geom.heads_per_cylinder - 1) /
disk->geom.sectors_per_head / disk->geom.heads_per_cylinder;
}
disk_t *file_test_availability(const char *device, const int verbose, const arch_fnct_t *arch, int testdisk_mode)
@ -1520,26 +1526,26 @@ disk_t *file_test_availability(const char *device, const int verbose, const arch
return NULL;
}
void hd_update_geometry(disk_t *disk_car, const int allow_partial_last_cylinder, const int verbose)
void hd_update_geometry(disk_t *disk, const int allow_partial_last_cylinder, const int verbose)
{
unsigned char *buffer;
buffer=(unsigned char *)MALLOC(disk_car->sector_size);
if(disk_car->autodetect!=0)
if(disk->autodetect!=0)
{
if((unsigned)disk_car->pread(disk_car, buffer, disk_car->sector_size, 0) == disk_car->sector_size)
unsigned char *buffer=(unsigned char *)MALLOC(disk->sector_size);
if((unsigned)disk->pread(disk, buffer, disk->sector_size, 0) == disk->sector_size)
{
if(verbose>1)
{
log_trace("autoset_geometry\n");
}
autoset_geometry(disk_car,buffer,1);
autoset_geometry(disk,buffer,1);
}
free(buffer);
}
if((unsigned int)(disk_car->geom.cylinders+1)!=0) /* Avoid to wrap */
if((unsigned int)(disk->geom.cylinders+1)!=0) /* Avoid to wrap */
{
uint64_t pos;
CHS_t pos_CHS;
pos_CHS.cylinder=disk_car->geom.cylinders-1+1;
pos_CHS.cylinder=disk->geom.cylinders-1+1;
if(allow_partial_last_cylinder)
{
pos_CHS.head=0;
@ -1547,35 +1553,38 @@ void hd_update_geometry(disk_t *disk_car, const int allow_partial_last_cylinder,
}
else
{
pos_CHS.head=disk_car->geom.heads_per_cylinder-1;
pos_CHS.sector=disk_car->geom.sectors_per_head;
pos_CHS.head=disk->geom.heads_per_cylinder-1;
pos_CHS.sector=disk->geom.sectors_per_head;
}
pos=CHS2offset(disk_car,&pos_CHS);
pos=CHS2offset(disk,&pos_CHS);
#ifdef DJGPP
if(disk_car->description==disk_description)
if(disk->description==disk_description)
{
struct info_disk_struct*data=disk_car->data;
struct info_disk_struct*data=disk->data;
data->geo_phys.cylinders=0;
}
#endif
if((unsigned)disk_car->pread(disk_car, buffer, disk_car->sector_size, pos) == disk_car->sector_size)
{
disk_car->geom.cylinders++;
if(disk_car->disk_size < (uint64_t)disk_car->geom.cylinders * disk_car->geom.heads_per_cylinder * disk_car->geom.sectors_per_head * disk_car->sector_size)
unsigned char *buffer=(unsigned char *)MALLOC(disk->sector_size);
if((unsigned)disk->pread(disk, buffer, disk->sector_size, pos) == disk->sector_size)
{
disk_car->disk_size = (uint64_t)disk_car->geom.cylinders * disk_car->geom.heads_per_cylinder * disk_car->geom.sectors_per_head * disk_car->sector_size;
log_info("Computes LBA from CHS for %s\n",disk_car->description(disk_car));
disk->geom.cylinders++;
if(disk->disk_size < (uint64_t)disk->geom.cylinders * disk->geom.heads_per_cylinder * disk->geom.sectors_per_head * disk->sector_size)
{
disk->disk_size = (uint64_t)disk->geom.cylinders * disk->geom.heads_per_cylinder * disk->geom.sectors_per_head * disk->sector_size;
log_info("Computes LBA from CHS for %s\n",disk->description(disk));
}
}
free(buffer);
}
}
#ifdef DJGPP
if(disk_car->description==disk_description)
if(disk->description==disk_description)
{
struct info_disk_struct*data=disk_car->data;
data->geo_phys.cylinders=disk_car->geom.cylinders;
struct info_disk_struct*data=disk->data;
data->geo_phys.cylinders=disk->geom.cylinders;
}
#endif
free(buffer);
}
void hd_update_all_geometry(const list_disk_t * list_disk, const int allow_partial_last_cylinder, const int verbose)
@ -1593,6 +1602,9 @@ void init_disk(disk_t *disk)
{
disk->autodetect=0;
disk->disk_size=0;
disk->user_max=0;
disk->native_max=0;
disk->dco=0;
/* Note, some Raid reserve the first 1024 512-sectors */
disk->offset=0;
disk->rbuffer=NULL;

4
src/partnone.c
View file

@ -162,10 +162,12 @@ static int get_geometry_from_nonembr(const unsigned char *buffer, const int verb
if(le16(fat_header->marker)==0xAA55)
{
if(le16(fat_header->secs_track)>0 && le16(fat_header->secs_track)<=63 &&
le16(fat_header->heads)>0 && le16(fat_header->heads)<=255)
le16(fat_header->heads)>0 && le16(fat_header->heads)<=255 &&
fat_sector_size(fat_header)>0 && fat_sector_size(fat_header)%512==0)
{
geometry->sectors_per_head=le16(fat_header->secs_track);
geometry->heads_per_cylinder=le16(fat_header->heads);
geometry->bytes_per_sector=fat_sector_size(fat_header);
}
}
}