[ovs-dev] [PATCH] rhel7.6: Support kmod build and load for mulitple kernel versions

[Ben Pfaff]

On Fri, May 31, 2019 at 03:57:45PM -0700, Yi-Hung Wei wrote:
> On Fri, May 31, 2019 at 2:59 PM Yifeng Sun <pkusunyifeng at gmail.com> wrote:
> >
> > RHEL 7.6's new kernel 3.10.0-957.12.1.el7 introduced some ABI changes.
> > This leads to an issue that OVS kernel module built against
> > kernels newer than 12.1 cannot be loaded on systems running kernels
> > older than 12.1, vice versa.
> >
> > By inspecting datapath/linux/openvswitch.mod.c, signatures of
> > the following kernel functions have changed in 3.10.0-957.12.1.el7:
> >     nf_ct_get_tuple
> >     nf_ct_invert_tuplepr
> >     __nf_ct_l4proto_find
> >
> > This patch enables OVS to build kernel modules against multiple
> > kernel versions and enables RHEL 7.6 system to load the compatible
> > module at runtime.
> >
> > make rpm-fedora-kmod \
> >     RPMBUILD_OPT='-D "kversion 3.10.0-957.10.1.el7.x86_64 \
> >     3.10.0-957.12.1.el7.x86_64"'
> >
> > Signed-off-by: Yifeng Sun <pkusunyifeng at gmail.com>
> > ---
> Looks good to me.
> 
> Acked-by: Yi-Hung Wei <yihung.wei at gmail.com>

Thanks, Yifeng (and Yi-Hung).  I applied this to master.  If it should
be backported, please let me know.