> On May 5, 2023, at 3:58 PM, Jason Gunthorpe <jgg@xxxxxxxx> wrote: > > On Fri, May 05, 2023 at 11:43:11AM -0400, Chuck Lever wrote: >> From: Chuck Lever <chuck.lever@xxxxxxxxxx> >> >> In the past, LOOPBACK and NONE (tunnel) devices had all-zero MAC >> addresses. siw_device_create() would fall back to copying the >> device's name in those cases, because an all-zero MAC address breaks >> the RDMA core IP-to-device lookup mechanism. > > Why not just make up a dummy address in SIW? It shouldn't need to leak > out of it.. It is just some artifact of how the iWarp stuff has been > designed I've been trying that. Even though the siw0 device is now registered with a non-zero GID, cma_acquire_dev_by_src_ip() still comes up with a zero GID which matches no device. Address resolution then fails. I'm still looking into why. -- Chuck Lever
