Re: [PATCH] IB/srp: Disallow duplicate RDMA/CM connections

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On Fri, Mar 16, 2018 at 10:55:57AM -0700, Bart Van Assche wrote:
> According to the SRP standard the INITIATOR and TARGET PORT IDENTIFIER
> fields from the login request specify the I_T nexus. Whether or not an
> SRP target closes an existing connection for an I_T nexus when a login
> request is received depends on the value of the MULTICHANNEL field in
> the login request. The SRP initiator derives the value of the
> INITIATOR and TARGET PORT IDENTIFIER fields from the .id_ext,
> .ioc_guid, .initiator_ext .sgid members of the srp_target_port
> structure. This means that the .rdma_cm.dst check must be removed from
> srp_conn_unique(). This patch avoids that for target ports that have
> multiple addresses, e.g. an IPv4 and an IPv6 address, and if a
> connection is established to both target port addresses, that the
> initiator logs in alternatingly every 10 seconds to the other target
> port address. An SRP target must namely terminate all but one
> connections for a given I_T nexus if the MULTICHANNEL field has not
> been set in the login request.
> 
> Fixes: 19f313438c77 ("IB/srp: Add RDMA/CM support")
> Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxx>
> ---
>  drivers/infiniband/ulp/srp/ib_srp.c | 3 ---
>  1 file changed, 3 deletions(-)

Applied to for-next

Thanks,
Jason
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