fd49ddaf7e
Creating rxe device on top of vlan interface will create a non-functional device that has an empty gids table and can't be used for rdma cm communication. This is caused by the logic in enum_all_gids_of_dev_cb()/is_eth_port_of_netdev(), which only considers networks connected to "upper devices" of the configured network device, resulting in an empty set of gids for a vlan interface, and attempts to connect via this rdma device fail in cm_init_av_for_response because no gids can be resolved. Apparently, this behavior was implemented to fit the HW-RoCE devices that create RoCE device per port, therefore RXE must behave the same like HW-RoCE devices and create rxe device per real device only. In order to communicate via a vlan interface, the user must use the gid index of the vlan address instead of creating rxe over vlan. Link: https://lore.kernel.org/r/20200811150415.3693-1-goody698@gmail.com Signed-off-by: Mohammad Heib <goody698@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> |
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