static int
dirdevopen(ScsiReq *rp)
{
uint64_t blocks;
uint8_t data[8+4+20]; /* 16-byte result: lba, blksize, reserved */
memset(data, 0, sizeof data);
if(SRstart(rp, 1) == -1 || SRrcapacity(rp, data) == -1)
return -1;
rp->lbsize = GETBELONG(data+4);
blocks = GETBELONG(data);
if(debug)
fprint(2, "disk: dirdevopen: 10-byte logical block size %lud, "
"# blocks %llud\n", rp->lbsize, blocks);
if(blocks == 0xffffffff){
if(SRrcapacity16(rp, data) == -1)
return -1;
rp->lbsize = GETBELONG(data + 8);
blocks = (int64_t)GETBELONG(data)<<32 | GETBELONG(data + 4);
if(debug)
fprint(2, "disk: dirdevopen: 16-byte logical block size"
" %lud, # blocks %llud\n", rp->lbsize, blocks);
}
/* some newer dev's don't support 6-byte commands */
if(blocks > Max24off && !force6bytecmds)
rp->flags |= Frw10;
return 0;
}
static long
cmdcapacity(ScsiReq *rp, int argc, char *argv[])
{
uchar d[8];
long n;
USED(argc, argv);
if((n = SRrcapacity(rp, d)) == -1)
return -1;
Bprint(&bout, " %ud %ud\n",
d[0]<<24|d[1]<<16|d[2]<<8|d[3],
d[4]<<24|d[5]<<16|d[6]<<8|d[7]);
return n;
}
