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scsi: Implement 'get_sense' callback

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The get_sense callback copies existing sense information into
the provided buffer. This is required if sense information
should be transferred together with the command response.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Hannes Reinecke 2011-04-18 13:36:02 +02:00 • committed by Paolo Bonzini
parent 0c34459b6a
commit 74382217ca
5 changed files with 49 additions and 1 deletions
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18
hw/scsi-generic.c
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@ -79,6 +79,23 @@ static void scsi_clear_sense(SCSIGenericState *s)
s->driver_status = 0;
}
static int scsi_get_sense(SCSIRequest *req, uint8_t *outbuf, int len)
{
SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, req->dev);
int size = SCSI_SENSE_BUF_SIZE;
if (!(s->driver_status & SG_ERR_DRIVER_SENSE)) {
size = scsi_build_sense(SENSE_CODE(NO_SENSE), s->sensebuf,
SCSI_SENSE_BUF_SIZE, 0);
}
if (size > len) {
size = len;
}
memcpy(outbuf, s->sensebuf, size);
return size;
}
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
{
SCSIRequest *req;
@ -535,6 +552,7 @@ static SCSIDeviceInfo scsi_generic_info = {
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
.get_sense = scsi_get_sense,
.qdev.props = (Property[]) {
DEFINE_BLOCK_PROPERTIES(SCSIGenericState, qdev.conf),
DEFINE_PROP_END_OF_LIST(),