CVS commit: src/sys/arch/xen/xen

["Jaromir Dolecek" <jdolecek%netbsd.org@localhost>]

Module Name:    src
Committed By:   jdolecek
Date:           Sat Mar 21 23:25:53 UTC 2020

Modified Files:
        src/sys/arch/xen/xen: xennetback_xenbus.c

Log Message:
need to retain csum_flags in xennetback_copymbuf() when creating
new mbuf for the COPY transmit path, so that later NETRXF_csum_blank
flag is set correctly when passing request over to DomU

fixes bad checksums in DomU when xvif(4) TX offload is enabled;
problem observed when testing new IPv6 offloading, but it should
affect also existing IPv4 offloading

Note: code in xennet(4) is unaffected, there code consults the original
mbuf, rather than the new_m one


To generate a diff of this commit:
cvs rdiff -u -r1.82 -r1.83 src/sys/arch/xen/xen/xennetback_xenbus.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.