[ofa-general] [PATCH 2/4] ib/sa: add new QoS fields to path record

[Or Gerlitz]

Sean Hefty wrote:
>> iser is rdma cm based, the only way for iser to use the sid is if the 
>> rdma cm allows it to do so, with this patch series its not possible.

> Can someone explain how iser and srp find the target devices?

Sean,

iser is no more (and no less...) then iscsi transport provider (another 
in-kernel transport provider is iscsi_tcp) in the framework of the linux 
open iscsi initiator. So with this 'i' at hand things --all-- go with IP 
addressing.

The initiator management is done by user space daemon, where the first 
stage is "target discovery" this is done using IP only and is beyond the 
scope here.

Once the the target IP is known, the user space daemon attempts to login 
  into the target, here iser comes into play and we connect through the 
rdma cm (see iser_connect() in iser_verbs.c), so with this dst IP at 
hand the rdma cm resolves for us: locally the hca/port/pkey, then the 
remote gid, then the path, then connect.

Or.