Hi Bart, On Fri, Oct 7, 2016 at 10:19 PM, Bart Van Assche <bart.vanassche@xxxxxxxxxxx> wrote: > Hello Parav, > > > Something else I was wondering about is whether or not the rdma_rxe driver > should allow being attached to a bridge interface? My take is it should not to avoid mis configurations. Below fix is required, which I tested to not allow on bridge type devices. I will send formal patch. diff --git a/drivers/infiniband/sw/rxe/rxe_sysfs.c b/drivers/infiniband/sw/rxe/rxe_sysfs.c index cf8e778..7f4e0f3 100644 --- a/drivers/infiniband/sw/rxe/rxe_sysfs.c +++ b/drivers/infiniband/sw/rxe/rxe_sysfs.c @@ -90,7 +90,11 @@ static int rxe_param_set_add(const char *val, const struct kernel_param *kp) err = -EINVAL; goto err; } - + if (netif_is_bridge_master(ndev)) { + pr_err("bridge device %s is unsupported\n", intf); + err = -EINVAL; + goto err; + } if (net_to_rxe(ndev)) { pr_err("rxe: already configured on %s\n", intf); err = -EINVAL; > Apparently the rdma_rxe > driver allows attaching to both the non-bridged and the bridged interfaces, > resulting in duplicate GIDs: > > # modprobe rdma_rxe > # brctl addbr virbr0 > # brctl addif virbr0 eth1 > # rxe_cfg add eth1 > # rxe_cfg add virbr0 > # rxe_cfg > Name Link Driver Speed NMTU IPv4_addr RDEV RMTU > eth0 yes virtio_net 1500 192.168.1.123 > eth1 no virtio_net 1500 rxe0 > virbr0 no bridge 1500 rxe1 > # (cd /sys/class/infiniband && grep -aH '' */ports/*/gids/0) > rxe0/ports/1/gids/0:fe80:0000:0000:0000:5054:00ff:fefd:2e4e > rxe1/ports/1/gids/0:fe80:0000:0000:0000:5054:00ff:fefd:2e4e > > Should it ever be allowed that two different ports have the same GID? > Not sure. It might be allowed LAG mode (at least IP based GID). I am not upto date of recent LAG updates from Leon. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html