On Sun, Oct 23, 2022 at 06:04:47PM -0400, Zhu Yanjun wrote: >From: Zhu Yanjun <yanjun.zhu@xxxxxxxxx> > >There are shared and exclusive modes in RDMA net namespace. After >discussion with Leon, the above modes are compatible with legacy IB >device. > >To the RoCE and iWARP devices, the ib devices should be in the same net >namespace with the related net devices regardless of in shared or >exclusive mode. Does this mean that shared mode is no longer supported for RoCE and iWarp devices ? > >In the first commit, when the net devices are moved to a new net >namespace, the related ib devices are also moved to the same net >namespace. > >In the second commit, the shared/exclusive modes still work with legacy >ib devices. To the RoCE and iWARP devices, these modes will not be >considered. > >Because MLX4/5 do not call the function ib_device_set_netdev to map ib >devices and the related net devices, the function ib_device_get_by_netdev >can not get ib devices from net devices. In the third commit, all the >registered ib devices are parsed to get the net devices, then compared >with the given net devices. > >The steps to make tests: >1) Create a new net namespace net0 > > ip netns add net0 > >2) Show the rdma links in init_net > > rdma link > > " > link mlx5_0/1 state DOWN physical_state DISABLED netdev enp7s0np1 > " > >3) Move the net device to net namespace net0 > > ip link set enp7s0np1 netns net0 > >4) Show the rdma links in init_net again > > rdma link > > There is no rdma links > >5) Show the rdma links in net0 > > ip netns exec net0 rdma link > > " > link mlx5_0/1 state DOWN physical_state DISABLED netdev enp7s0np1 > " > >We can confirm that rdma links are moved to the same net namespace with >the net devices. > >Zhu Yanjun (3): > RDMA/core: Move ib device to the same net namespace with net device > RDMA/core: The legacy IB devices still work with shared/exclusive mode > RDMA/core: Get all the ib devices from net devices > > drivers/infiniband/core/device.c | 107 ++++++++++++++++++++++++++++++- > 1 file changed, 105 insertions(+), 2 deletions(-) > >-- >2.27.0
