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linux-next/drivers/infiniband/ulp
Denis Drozdov 75da96067a IB/IPoIB: Set ah valid flag in multicast send flow
The change of ipoib_ah data structure with adding "valid" flag and
checks of ah->valid in ipoib_start_xmit affected multicast packet flow.

Since the multicast flow doesn't invoke path_rec_start, "ah->valid" flag
remains unset, so that ipoib_start_xmit end up with neigh_refresh_path
instead of sending the packet using neigh.

"ah->valid" has to be set in multicast send flow. As a result IPoIB
starts sending packets via neigh immediately and eliminates 60sec delay
of neigh keep alive interval.

The typical example of this issue are two sequential arpings:

arping 11.134.208.9 -> got response (mcast_send)
arping 11.134.208.9 -> no response  (ah->valid = 0)

Fixes: fa9391dbad ("RDMA/ipoib: Update paths on CLIENT_REREG/SM_CHANGE events")
Signed-off-by: Denis Drozdov <denisd@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-08-01 15:23:03 -06:00
..
ipoib IB/IPoIB: Set ah valid flag in multicast send flow 2018-08-01 15:23:03 -06:00
iser IB/iser: Inline two work request conversion functions 2018-07-30 19:59:40 -06:00
isert IB/isert: Simplify ib_post_(send|recv|srq_recv)() calls 2018-07-24 16:06:36 -06:00
opa_vnic opa_vnic: Just use skb_get_hash instead of skb_tx_hash 2018-04-29 22:01:32 -04:00
srp RDMA/cma: Constify path record, ib_cm_event, listen_id pointers 2018-07-30 20:49:04 -06:00
srpt RDMA/cma: Constify path record, ib_cm_event, listen_id pointers 2018-07-30 20:49:04 -06:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00