[ofa-general] Re: impossibility to bind a device/port with the rdma-cm when the port is down

[Or Gerlitz]

Sean Hefty wrote:
> Why is ib_sa_get_mcmember_rec being called?  Or is this issue separate from what
> udaddy is showing?
The IPOIB port space allows for UD interoperability between IPoIB and 
RDMA-CM based apps. For that end, among other params such as the mgid 
derivation, the qkey used for the UD QP must be the same. To achieve 
that, a query on the broadcast group is done to the core multicast 
data-base to retrieve the  associated record from which the qkey is 
extracted. When the port goes down, this db is being flushed and 
ib_sa_get_mcmember_rec returns  EADDRNOTAVAIL which is exactly what 
udaddy is getting (you can also get it with mckey).

> Can you determine what call in the kernel is actually failing during the bind?
mcast_find being called from ib_sa_get_mcmember_rec

Or.