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scsi: implement REPORT LUNS for arbitrary LUNs

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-09-14 20:39:36 +02:00 committed by Kevin Wolf
parent f48a7a6e35
commit ba74307c5a
1 changed files with 40 additions and 11 deletions
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51
hw/scsi-bus.c
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@ -170,7 +170,7 @@ typedef struct SCSITargetReq SCSITargetReq;
struct SCSITargetReq {
SCSIRequest req;
int len;
uint8_t buf[64];
uint8_t buf[2056];
};
static void store_lun(uint8_t *outbuf, int lun)
@ -185,23 +185,52 @@ static void store_lun(uint8_t *outbuf, int lun)
static bool scsi_target_emulate_report_luns(SCSITargetReq *r)
{
int len;
DeviceState *qdev;
int i, len, n;
int id;
bool found_lun0;
if (r->req.cmd.xfer < 16) {
return false;
}
if (r->req.cmd.buf[2] > 2) {
return false;
}
len = MIN(sizeof r->buf, r->req.cmd.xfer);
memset(r->buf, 0, len);
if (r->req.dev->lun != 0) {
r->buf[3] = 16;
r->len = 24;
store_lun(&r->buf[16], r->req.dev->lun);
} else {
r->buf[3] = 8;
r->len = 16;
id = r->req.dev->id;
found_lun0 = false;
n = 0;
QTAILQ_FOREACH(qdev, &r->req.bus->qbus.children, sibling) {
SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev);
if (dev->id == id) {
if (dev->lun == 0) {
found_lun0 = true;
}
n += 8;
}
}
if (!found_lun0) {
n += 8;
}
len = MIN(n + 8, r->req.cmd.xfer & ~7);
if (len > sizeof(r->buf)) {
/* TODO: > 256 LUNs? */
return false;
}
memset(r->buf, 0, len);
stl_be_p(&r->buf, n);
i = found_lun0 ? 8 : 16;
QTAILQ_FOREACH(qdev, &r->req.bus->qbus.children, sibling) {
SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev);
if (dev->id == id) {
store_lun(&r->buf[i], dev->lun);
i += 8;
}
}
assert(i == n + 8);
r->len = len;
return true;
}