• Parav Pandit's avatar
    IB/cm: Block processing alternate path handling RoCE Rx cm messages · 97c45c2c
    Parav Pandit authored
    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: default avatarParav Pandit <parav@mellanox.com>
    Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
    Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
    97c45c2c
cm.c 126 KB