fsw_status_t fsw_efi_read_block(struct fsw_volume *vol, fsw_u32 phys_bno, void *buffer)
{
EFI_STATUS Status;
FSW_VOLUME_DATA *Volume = (FSW_VOLUME_DATA *)vol->host_data;
FSW_MSG_DEBUGV((FSW_MSGSTR("fsw_efi_read_block: %d (%d)\n"), phys_bno, vol->phys_blocksize));
// read from disk
Status = Volume->DiskIo->ReadDisk(Volume->DiskIo, Volume->MediaId,
(UINT64)phys_bno * vol->phys_blocksize,
vol->phys_blocksize,
buffer);
Volume->LastIOStatus = Status;
if (EFI_ERROR(Status))
return FSW_IO_ERROR;
return FSW_SUCCESS;
}
fsw_status_t fsw_posix_read_block(struct fsw_volume *vol, fsw_u32 phys_bno, void *buffer)
{
struct fsw_posix_volume *pvol = (struct fsw_posix_volume *)vol->host_data;
off_t block_offset, seek_result;
ssize_t read_result;
FSW_MSG_DEBUGV((FSW_MSGSTR("fsw_posix_read_block: %d (%d)\n"), phys_bno, vol->phys_blocksize));
// read from disk
block_offset = (off_t)phys_bno * vol->phys_blocksize;
seek_result = lseek(pvol->fd, block_offset, SEEK_SET);
if (seek_result != block_offset)
return FSW_IO_ERROR;
read_result = read(pvol->fd, buffer, vol->phys_blocksize);
if (read_result != vol->phys_blocksize)
return FSW_IO_ERROR;
return FSW_SUCCESS;
}