Currently the tun device can work well with SIW while it can not work well with SoftROCE. The RXE device can be attached to the tun device with the command "rdma link add ...". But when running rping command over this RXE device, some error will occur. The following bash script can verify this patch series. " ip tuntap add mode tun tun0 ip -4 a ip addr add 1.1.1.1/24 dev tun0 ip link set tun0 up ip -4 a rdma link add rxe0 type rxe netdev tun0 rdma link rping -s -a 1.1.1.1& dmesg -c rping -c -a 1.1.1.1 -d -v -C 3 rdma link del rxe0 rdma link ip addr del 1.1.1.1/24 dev tun0 ip tuntap del mode tun tun0 modprobe -v -r tun " In the above script, a tun device is added and an ip address is configured on it. Then a RXE device is attached to this tun device. A rping test is executed with this RXE device. It should be successful with this patchset. Finally all the RXE device and tun device should be released after the rping command is executed. Without this patch series, when running "rping -c -a ..." command, the following errors will appear. " ... created cm_id 0x556b45faf2a0 cma_event type RDMA_CM_EVENT_ADDR_ERROR cma_id 0x556b45faf2a0 (parent) cma event RDMA_CM_EVENT_ADDR_ERROR, error -19 waiting for addr/route resolution state 1 destroy cm_id 0x556b45faf2a0 " Zhu Yanjun (3): RDMA/rxe: Replace netdev dev addr with raw_gid RDMA/rxe: Add query_gid support RDMA/rxe: Make rping work with tun device drivers/infiniband/core/cma.c | 24 +++++++++++++++++++----- drivers/infiniband/sw/rxe/rxe.c | 15 +++++++++++++-- drivers/infiniband/sw/rxe/rxe_verbs.c | 15 ++++++++++++++- drivers/infiniband/sw/rxe/rxe_verbs.h | 4 +++- 4 files changed, 49 insertions(+), 9 deletions(-) -- 2.34.1
