Date: Mon, 08 Sep 2025 20:43:59 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 165059] vtnet(4): Networking breaks with a router using virtio net driver on KVM host Message-ID: <bug-165059-7501-2ODhDelWn2@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-165059-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-165059-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=165059 --- Comment #49 from commit-hook@FreeBSD.org --- A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=3008f30d2c2cabdd7e17f7fb922139da8681ffbd commit 3008f30d2c2cabdd7e17f7fb922139da8681ffbd Author: Timo Völker <timo.voelker@fh-muenster.de> AuthorDate: 2025-09-08 20:38:49 +0000 Commit: Michael Tuexen <tuexen@FreeBSD.org> CommitDate: 2025-09-08 20:38:49 +0000 vtnet: improve checksum offloading When transmitting a packet over the vtnet interface, map the csum flags CSUM_DATA_VALID | CSUM_PSEUDO_HDR to the virtio flag VIRTIO_NET_HDR_F_DATA_VALID. When receiving a packet over the virtio network channel, translate the virtio flag VIRTIO_NET_HDR_F_NEEDS_CSUM not to CSUM_DATA_VALID | CSUM_PSEUDO_HDR, but to CSUM_TCP, CSUM_TCP_IPV6, CSUM_UDP, or CSUM_UDP_IPV6. The second change fixes a series of issue related to checksum offloading for if_vtnet. While there, improve the stats counters to allow a detailed view on what is going on in relation to checksum offloading. PR: 165059 Reviewed by: tuexen, manpages MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D51686 share/man/man4/vtnet.4 | 28 +++-- sys/dev/virtio/network/if_vtnet.c | 220 ++++++++++++++++++----------------- sys/dev/virtio/network/if_vtnetvar.h | 2 +- 3 files changed, 132 insertions(+), 118 deletions(-) -- You are receiving this mail because: You are the assignee for the bug. You are on the CC list for the bug.
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