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IB/mad: Return error response for unsupported MADs 

Set up a response with appropriate error status and send it for MADs
that are not supported by a specific class/version.

Reviewed-by: Hal Rosenstock <hal@mellanox.com>
Signed-off-by: Swapna Thete <swapna.thete@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Swapna Thete 2012-02-25 17:47:32 -08:00 committed by Roland Dreier
parent d144b650c6
commit 0b30704304
1 changed files with 21 additions and 0 deletions
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21
drivers/infiniband/core/mad.c
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@ -1842,6 +1842,24 @@ static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
}
}
static bool generate_unmatched_resp(struct ib_mad_private *recv,
struct ib_mad_private *response)
{
if (recv->mad.mad.mad_hdr.method == IB_MGMT_METHOD_GET ||
recv->mad.mad.mad_hdr.method == IB_MGMT_METHOD_SET) {
memcpy(response, recv, sizeof *response);
response->header.recv_wc.wc = &response->header.wc;
response->header.recv_wc.recv_buf.mad = &response->mad.mad;
response->header.recv_wc.recv_buf.grh = &response->grh;
response->mad.mad.mad_hdr.method = IB_MGMT_METHOD_GET_RESP;
response->mad.mad.mad_hdr.status =
cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB);
return true;
} else {
return false;
}
}
static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv,
struct ib_wc *wc)
{
@ -1963,6 +1981,9 @@ local:
* or via recv_handler in ib_mad_complete_recv()
*/
recv = NULL;
} else if (generate_unmatched_resp(recv, response)) {
agent_send_response(&response->mad.mad, &recv->grh, wc,
port_priv->device, port_num, qp_info->qp->qp_num);
}
out: