[openib-general] [RFC] [PATCH] ib_usa: export multicast and informinfo registration to userspace

[Sean Hefty]

>>+static int process_mcast(struct usa_file *file, struct ib_usa_request *req,
>>+			 int out_len)
>>+{
>>+	/* Only indirect requests are currently supported. */
>>+	if (!req->local)
>>+		return -ENOSYS;
>>+
>>+	switch (req->method) {
>>+	case IB_MGMT_METHOD_GET:
>>+		return get_mcast(file, req, out_len);
>>+	case IB_MGMT_METHOD_SET:
>>+		return join_mcast(file, req, out_len);
>>+	default:
>>+		return -EINVAL;
> 
> 
> Should leaving a multicast group also be supported ?

It is - just in a different way.  Once a user has joined a multicast group or 
registered for notices, they leave/unregister by issuing a 'free' request.  The 
majority of the code ends up being the same.

- Sean