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spapr-vscsi: Report error on unsupported MAD requests 

The existing driver just dropped unsupported requests. This adds error
responses to those unhandled requests.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Alexey Kardashevskiy 2013-08-29 18:13:25 +10:00 committed by Paolo Bonzini
parent 26573a0c1f
commit f4ff3b7ba1
1 changed files with 18 additions and 4 deletions
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22
hw/scsi/spapr_vscsi.c
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@ -977,29 +977,43 @@ static int vscsi_send_capabilities(VSCSIState *s, vscsi_req *req)
static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req)
{
union mad_iu *mad = &req->iu.mad;
bool request_handled = false;
uint64_t retlen = 0;
switch (be32_to_cpu(mad->empty_iu.common.type)) {
case VIOSRP_EMPTY_IU_TYPE:
fprintf(stderr, "Unsupported EMPTY MAD IU\n");
retlen = sizeof(mad->empty_iu);
break;
case VIOSRP_ERROR_LOG_TYPE:
fprintf(stderr, "Unsupported ERROR LOG MAD IU\n");
mad->error_log.common.status = cpu_to_be16(1);
vscsi_send_iu(s, req, sizeof(mad->error_log), VIOSRP_MAD_FORMAT);
retlen = sizeof(mad->error_log);
break;
case VIOSRP_ADAPTER_INFO_TYPE:
vscsi_send_adapter_info(s, req);
request_handled = true;
break;
case VIOSRP_HOST_CONFIG_TYPE:
mad->host_config.common.status = cpu_to_be16(1);
vscsi_send_iu(s, req, sizeof(mad->host_config), VIOSRP_MAD_FORMAT);
retlen = sizeof(mad->host_config);
break;
case VIOSRP_CAPABILITIES_TYPE:
vscsi_send_capabilities(s, req);
request_handled = true;
break;
default:
fprintf(stderr, "VSCSI: Unknown MAD type %02x\n",
be32_to_cpu(mad->empty_iu.common.type));
/*
* PAPR+ says that "The length field is set to the length
* of the data structure(s) used in the command".
* As we did not recognize the request type, put zero there.
*/
retlen = 0;
}
if (!request_handled) {
mad->empty_iu.common.status = cpu_to_be16(VIOSRP_MAD_NOT_SUPPORTED);
vscsi_send_iu(s, req, retlen, VIOSRP_MAD_FORMAT);
}
return 1;