Re: [PATCH net-next 0/8] net: fib_rules: Add port mask support

[David Ahern <dsahern@kernel.org>]

On 2/17/25 6:41 AM, Ido Schimmel wrote:
> In some deployments users would like to encode path information into
> certain bits of the IPv6 flow label, the UDP source port and the DSCP
> field and use this information to route packets accordingly.
> 
> Redirecting traffic to a routing table based on specific bits in the UDP
> source port is not currently possible. Only exact match and range are
> currently supported by FIB rules.
> 
> This patchset extends FIB rules to match on layer 4 ports with an
> optional mask. The mask is not supported when matching on a range. A
> future patchset will add support for matching on the DSCP field with an
> optional mask.
> 
> Patches #1-#6 gradually extend FIB rules to match on layer 4 ports with
> an optional mask.
> 
> Patches #7-#8 add test cases for FIB rule port matching.
> 
> iproute2 support can be found here [1].
> 
> [1] https://github.com/idosch/iproute2/tree/submit/fib_rule_mask_v1
> 
> Ido Schimmel (8):
>   net: fib_rules: Add port mask attributes
>   net: fib_rules: Add port mask support
>   ipv4: fib_rules: Add port mask matching
>   ipv6: fib_rules: Add port mask matching
>   net: fib_rules: Enable port mask usage
>   netlink: specs: Add FIB rule port mask attributes
>   selftests: fib_rule_tests: Add port range match tests
>   selftests: fib_rule_tests: Add port mask match tests
> 
>  Documentation/netlink/specs/rt_rule.yaml      | 10 +++
>  include/net/fib_rules.h                       | 19 +++++
>  include/uapi/linux/fib_rules.h                |  2 +
>  net/core/fib_rules.c                          | 69 ++++++++++++++++++-
>  net/ipv4/fib_rules.c                          |  8 +--
>  net/ipv6/fib6_rules.c                         |  8 +--
>  tools/testing/selftests/net/fib_rule_tests.sh | 36 ++++++++++
>  7 files changed, 143 insertions(+), 9 deletions(-)
> 

For the set:
Reviewed-by: David Ahern <dsahern@kernel.org>