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iSCSI: We need to support SG_IO also from iscsi_ioctl() 

We need to support SG_IO from the synchronous iscsi_ioctl() since
scsi-block uses this to do an INQ to the device to discover its properties
This patch makes scsi-block work with iscsi.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Ronnie Sahlberg 2012-08-30 17:28:40 -07:00 committed by Paolo Bonzini
parent c26032b2c9
commit f1a12821d7
1 changed files with 17 additions and 0 deletions
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17
block/iscsi.c
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@ -628,9 +628,17 @@ static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
return &acb->common;
}
static void ioctl_cb(void *opaque, int status)
{
int *p_status = opaque;
*p_status = status;
}
static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
{
IscsiLun *iscsilun = bs->opaque;
int status;
switch (req) {
case SG_GET_VERSION_NUM:
@ -639,6 +647,15 @@ static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
case SG_GET_SCSI_ID:
((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
break;
case SG_IO:
status = -EINPROGRESS;
iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status);
while (status == -EINPROGRESS) {
qemu_aio_wait();
}
return 0;
default:
return -1;
}