Date: Tue, 04 Oct 2016 18:05:16 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 213201] [bhyve] virtio-net requires more than one descriptor per tx operation Message-ID: <bug-213201-8@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D213201 Bug ID: 213201 Summary: [bhyve] virtio-net requires more than one descriptor per tx operation Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: misc Assignee: freebsd-bugs@FreeBSD.org Reporter: ricarkol@gmail.com Hello, We noticed that the Tx path for bhyve virtio-net devices (pci_virtio_net.c:pci_vtnet_proctx) assumes that all Tx'es will have a first descriptor with the header alone (https://svnweb.freebsd.org/base/head/usr.sbin/bhyve/pci_virtio_net.c?view= =3Dmarkup#l609): sc->pci_vtnet_tx(sc, &iov[1], n - 1, plen); // Skips the header descriptor The issue is that the virtio 1.0 specification allows for having the net he= ader and the data in a single descriptor. See section 5.1.6.2 of the virtio spec (http://docs.oasis-open.org/virtio/virtio/v1.0/cs04/virtio-v1.0-cs04.html#x= 1-1680006). Thanks, Ricardo --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-213201-8>