The type of the net->net_cookie field member was changed in kernel 5.12
with commit 3d368ab87cf6 ("net: initialize net->net_cookie at netns setup").
Older versions of the kernel devices net->net_cookie as an atomic64_t
instead of a u64. This causes CO-RE reading of the field to fail due to the
type mismatch. Handle this by adding CO-RE checks for the old type as well
and using the CO-RE facility to check for the right type at load time.
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Add a small utility that uses a kprobe to extract the currently active
slave ifindex from a bond interface. This value is normally only exported
to userspace for bond types where it can be explicitly set, but the bond
driver has an internal notion of an active interface regardless of the bond
type. We can extract this value with a kprobe by attaching to a function in
the bond driver and triggering an operation that causes this function to be
called.
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
