[ upstream commit 36c6431 ]

bpf_get_netns_cookie() was added to the kernel with v5.7.

Signed-off-by: Julian Wiedmann <jwi@isovalent.com>

[ upstream commit 8a4db90 ]

Extend the LRP load-testing that was introduced with
#35016 and
#35099, so that the 5.4 kernel is
also covered.

This helps to reproduce the bug reported in
#40457.

Signed-off-by: Julian Wiedmann <jwi@isovalent.com>

[ upstream commit 5745846 ]

#33721 refactored the LRP code in
bpf_sock, and dropped the HAVE_NETNS_COOKIE guard when calling
get_netns_cookie(). When LRP is enabled, this causes the verifier on
pre-5.8 kernels (where the helper is not available) to reject the bpf_sock
program with "invalid func unknown#122".

Re-introduce the check for HAVE_NETNS_COOKIE in the IPv4 path. This matches
the IPv6 path.

Fixes: 9d8b5f7 ("bpf:move LBx skip map and lookup functions to lb.h")
Fixes: #40457
Signed-off-by: Julian Wiedmann <jwi@isovalent.com>