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
start(ScsiReq *rp, int argc, char *argv[], uchar code)
{
char *p;
if(argc && (code = strtoul(argv[0], &p, 0)) == 0 && p == argv[0]){
rp->status = Status_BADARG;
return -1;
}
return SRstart(rp, code);
}
static int
wormdevopen(ScsiReq *rp)
{
int32_t status;
uint8_t list[MaxDirData];
if (SRstart(rp, 1) == -1 ||
(status = SRmodesense10(rp, Allmodepages, list, sizeof list)) == -1)
return -1;
/* nbytes = list[0]<<8 | list[1]; */
/* # of bytes of block descriptors of 8 bytes each; not even 1? */
if((list[6]<<8 | list[7]) < 8)
rp->lbsize = 2048;
else
/* last 3 bytes of block 0 descriptor */
rp->lbsize = GETBE24(list+13);
if(debug)
fprint(2, "disk: wormdevopen: 10-byte logical block size %lud\n",
rp->lbsize);
return status;
}
