/* Sector walking */
static void walk_sectors(open_file_t *file, uint32_t num_sectors)
{
/* Update the sector number */
file->sector_number += num_sectors;
/* Walk forward num_sectors */
while(num_sectors)
{
file_entry_t *next_sector = get_next_sector(&file->cur_sector);
grab_sector(next_sector, &file->cur_sector);
num_sectors--;
}
}
static int fill_delta(struct block_delta *delta, const struct bio *bio, bvec_iter iter, const int start_sector)
{
int count;
int next_sector;
char *data;
delta->start_sector = start_sector;
delta->size = bio_iter_len(bio, iter);
next_sector = get_next_sector(delta);
delta->end_sector = next_sector - 1;
delta->offset = bio_iter_offset(bio, iter);
data = kmap(bio_iter_page(bio, iter));
count = find_word_count("DAMN", data, PAGE_SIZE);
if (count > 0) LOG("Found DAMN from page %d times", count);
delta->data = vmalloc(delta->size);
if (delta->data != NULL) memcpy(delta->data, data + delta->offset, delta->size);
kunmap(bio_iter_page(bio, iter));
return (delta->data != NULL)? next_sector : -1;
}
static int pfind_sectors_per_cluster(disk_t *disk, partition_t *partition, const int verbose, unsigned int *sectors_per_cluster, uint64_t *offset_org, alloc_data_t *list_search_space)
{
uint64_t offset=0;
unsigned int nbr_subdir=0;
sector_cluster_t sector_cluster[10];
alloc_data_t *current_search_space;
unsigned char *buffer_start=(unsigned char *)MALLOC(READ_SIZE);
unsigned char *buffer=buffer_start;
current_search_space=td_list_entry(list_search_space->list.next, alloc_data_t, list);
if(current_search_space!=list_search_space)
offset=current_search_space->start;
if(verbose>0)
info_list_search_space(list_search_space, current_search_space, disk->sector_size, 0, verbose);
#ifdef HAVE_NCURSES
wmove(stdscr,22,0);
wattrset(stdscr, A_REVERSE);
waddstr(stdscr," Stop ");
wattroff(stdscr, A_REVERSE);
#endif
disk->pread(disk, buffer_start, READ_SIZE, offset);
while(current_search_space!=list_search_space && nbr_subdir<10)
{
const uint64_t old_offset=offset;
#ifdef HAVE_NCURSES
if((offset&(1024*disk->sector_size-1))==0)
{
wmove(stdscr,9,0);
wclrtoeol(stdscr);
wprintw(stdscr,"Search subdirectory %10lu/%lu %u",(unsigned long)(offset/disk->sector_size),(unsigned long)(partition->part_size/disk->sector_size),nbr_subdir);
wrefresh(stdscr);
}
#endif
if(memcmp(buffer, ". ", 8+3)==0 &&
memcmp(&buffer[0x20], ".. ", 8+3)==0)
{
const unsigned long int cluster=(buffer[0*0x20+0x15]<<24) + (buffer[0*0x20+0x14]<<16) +
(buffer[0*0x20+0x1B]<<8) + buffer[0*0x20+0x1A];
log_info("sector %lu, cluster %lu\n",
(unsigned long)(offset/disk->sector_size), cluster);
sector_cluster[nbr_subdir].cluster=cluster;
sector_cluster[nbr_subdir].sector=offset/disk->sector_size;
log_flush();
nbr_subdir++;
}
get_next_sector(list_search_space, ¤t_search_space, &offset, 512);
buffer+=512;
if( old_offset+512!=offset ||
buffer+512>buffer_start+READ_SIZE)
{
buffer=buffer_start;
if(verbose>1)
{
log_verbose("Reading sector %10llu/%llu\n",
(unsigned long long)((offset-partition->part_offset)/disk->sector_size),
(unsigned long long)((partition->part_size-1)/disk->sector_size));
}
if(disk->pread(disk, buffer_start, READ_SIZE, offset) != READ_SIZE)
{
}
}
} /* end while(current_search_space!=list_search_space) */
free(buffer_start);
return find_sectors_per_cluster_aux(sector_cluster,nbr_subdir,sectors_per_cluster,offset_org,verbose,partition->part_size/disk->sector_size, UP_UNK);
}
static int pfind_sectors_per_cluster(disk_t *disk, partition_t *partition, const int verbose, unsigned int *sectors_per_cluster, uint64_t *offset_org, alloc_data_t *list_search_space)
{
uint64_t offset=0;
uint64_t next_offset=0;
uint64_t diff_offset=0;
time_t previous_time=0;
unsigned int nbr_subdir=0;
sector_cluster_t sector_cluster[10];
alloc_data_t *current_search_space;
unsigned char *buffer_start=(unsigned char *)MALLOC(READ_SIZE);
unsigned char *buffer=buffer_start;
assert(disk->sector_size!=0);
current_search_space=td_list_first_entry(&list_search_space->list, alloc_data_t, list);
if(current_search_space!=list_search_space)
offset=current_search_space->start;
if(verbose>0)
info_list_search_space(list_search_space, current_search_space, disk->sector_size, 0, verbose);
#ifdef HAVE_NCURSES
wmove(stdscr,22,0);
wattrset(stdscr, A_REVERSE);
waddstr(stdscr," Stop ");
wattroff(stdscr, A_REVERSE);
#endif
disk->pread(disk, buffer_start, READ_SIZE, offset);
while(current_search_space!=list_search_space && nbr_subdir<10)
{
const uint64_t old_offset=offset;
if(buffer[0]=='.' && is_fat_directory(buffer))
{
const unsigned long int cluster=fat_get_cluster_from_entry((const struct msdos_dir_entry *)buffer);
log_info("sector %lu, cluster %lu\n",
(unsigned long)(offset/disk->sector_size), cluster);
sector_cluster[nbr_subdir].cluster=cluster;
sector_cluster[nbr_subdir].sector=offset/disk->sector_size;
log_flush();
nbr_subdir++;
}
get_next_sector(list_search_space, ¤t_search_space, &offset, 512);
buffer+=512;
if( old_offset+512!=offset ||
buffer+512>buffer_start+READ_SIZE)
{
buffer=buffer_start;
#ifdef HAVE_NCURSES
if(offset > next_offset)
{
const time_t current_time=time(NULL);
if(current_time==previous_time)
diff_offset<<=1;
else
diff_offset>>=1;
if(diff_offset < disk->sector_size)
diff_offset=disk->sector_size;
next_offset=offset+diff_offset;
previous_time=current_time;
wmove(stdscr,9,0);
wclrtoeol(stdscr);
wprintw(stdscr,"Search subdirectory %10lu/%lu %u",(unsigned long)(offset/disk->sector_size),(unsigned long)(partition->part_size/disk->sector_size),nbr_subdir);
wrefresh(stdscr);
}
#endif
if(verbose>1)
{
log_verbose("Reading sector %10llu/%llu\n",
(unsigned long long)((offset-partition->part_offset)/disk->sector_size),
(unsigned long long)((partition->part_size-1)/disk->sector_size));
}
if(disk->pread(disk, buffer_start, READ_SIZE, offset) != READ_SIZE)
{
#ifdef HAVE_NCURSES
wmove(stdscr,11,0);
wclrtoeol(stdscr);
wprintw(stdscr,"Error reading sector %10lu\n",
(unsigned long)((offset - partition->part_offset) / disk->sector_size));
#endif
}
}
} /* end while(current_search_space!=list_search_space) */
