Having heard no objections, I went ahead and committed this fix: https://cgit.freebsd.org/src/commit/?id=8d079c6a9a5dfdc75adaf9bc31f2ee8111b849a1
Thanks, Ravi (rpokala@ , wearing my Vdura hat) -----Original Message----- From: Ravi Pokala <rpok...@freebsd.org <mailto:rpok...@freebsd.org>> Date: Monday, February 10, 2025 at 17:13 To: <freebsd-net@freebsd.org <mailto:freebsd-net@freebsd.org>>, "Dance, Nick" <nda...@vdura.com <mailto:nda...@vdura.com>> Subject: PR 1591: if_infiniband: Support BPF write for broadcast frames > Hi folks, > > Vdura (you might know of us as Panasas; we renamed ourselves last year) is > starting to use InfiniBand on our FreeBSD-based platforms. One of our first > issues was getting DHCP to work with InfiniBand, because we use DHCP for not > just assigning addresses, but also for passing other configuration > information using the standard mechanism for optional data. > > A Linux IP-over-IB client was able to send DHCDISCOVER, and our FreeBSD > server was able to set up BPF and receive it. But when the server tried to > send an ARP to make sure that the address it wanted to DHCPOFFER was > available, nothing went over the wire. It turns out that if_infiniband > interfaces don't transmit link-layer broadcasts. > > My colleague Nick was able to solve this, and the rest of the bring-up went > smoothly. The fix passes muster internally, but we were hoping to get some > more eyes on it before committing it to the main repo. > > If anyone wants to take a look: > https://github.com/freebsd/freebsd-src/pull/1591 > > If I don't hear any objections by the end of the week, I'll go ahead and > submit it. > > Thanks, > > Ravi (rpokala@ , wearing my Vdura hat)
