https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254366
--- Comment #19 from commit-h...@freebsd.org --- A commit in branch stable/13 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=6064ea8172f078c54954bc6e8865625feb7979fe commit 6064ea8172f078c54954bc6e8865625feb7979fe Author: Michael Tuexen <tue...@freebsd.org> AuthorDate: 2021-03-18 20:25:47 +0000 Commit: Michael Tuexen <tue...@freebsd.org> CommitDate: 2021-03-18 20:33:32 +0000 vtnet: fix TSO for TCP/IPv6 The decision whether a TCP packet is sent over IPv4 or IPv6 was based on ethertype, which works correctly. In D27926 the criteria was changed to checking if the CSUM_IP_TSO flag is set in the csum-flags and then considering it to be TCP/IPv4. However, the TCP stack sets the flag to CSUM_TSO for IPv4 and IPv6, where CSUM_TSO is defined as CSUM_IP_TSO|CSUM_IP6_TSO. Therefore TCP/IPv6 packets gets mis-classified as TCP/IPv4, which breaks TSO for TCP/IPv6. This patch bases the check again on the ethertype. This fix is instantly MFCed. Approved by: re(gjb) PR: 254366 Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D29331 (cherry picked from commit d4697a6b56168876fc0ffec1a0bb1b24d25b198e) sys/dev/virtio/network/if_vtnet.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) -- You are receiving this mail because: You are on the CC list for the bug. _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
