WSL2-Linux-Kernel/drivers/infiniband
Parav Pandit 97c45c2c28 IB/cm: Block processing alternate path handling RoCE Rx cm messages
Due to below reasons, it is better to not support alternate path receive
messages for RoCE in near term.

1. Alternate path for RoCE is not supported at rdmacm layer.
2. It is not supported in uverbs/core layer for RoCE.
3. Alternate path for IPv6 for link local address cannot resolve route
determinstically without a valid incoming interface id whose usecase
make sense only with dual port mode.
4. init_av_from_path while processing LAP messages for IB and RoCE can
lead to adding duplicate entry of AV into the port list, leads to list
corruption.
5. rdma-core userspace a well known userspace implementation has removed
support of libucm which use ucm.ko module, which is the only module that
can trigger alternate path related messages.
6. ucm kernel module is requested to be removed from the IB core in
patch [1].

[1] https://patchwork.kernel.org/patch/10268503/

Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-03-27 16:22:12 -06:00
..
core IB/cm: Block processing alternate path handling RoCE Rx cm messages 2018-03-27 16:22:12 -06:00
hw IB/mlx5: Respect new UMR capabilities 2018-03-27 14:43:10 -06:00
sw RDMA/rxe: Fix uABI structure layouts for 32/64 compat 2018-03-27 14:25:09 -06:00
ulp IB/srp: Disallow duplicate RDMA/CM connections 2018-03-19 13:54:50 -06:00
Kconfig IB/uverbs: Enable ioctl() uAPI by default for new verbs 2018-03-19 14:45:17 -06:00
Makefile