Commit dd4f33b4 authored by Jakub Kicinski's avatar Jakub Kicinski
Browse files

Merge branch 'tools-ynl-c-basic-netlink-raw-support' 

Jakub Kicinski says:

====================
tools: ynl: c: basic netlink-raw support

Basic support for netlink-raw AKA classic netlink in user space C codegen.
This series is enough to read routes and addresses from the kernel
(see the samples in patches 12 and 13).

Specs need to be slightly adjusted and decorated with the c naming info.

In terms of codegen this series includes just the basic plumbing required
to skip genlmsghdr and handle request types which may technically also
be legal in genetlink-legacy but are very uncommon there.

Subsequent series will add support for:
 - handling CRUD-style notifications
 - code gen for array types classic netlink uses
 - sub-message support

v1: https://lore.kernel.org/20250409000400.492371-1-kuba@kernel.org
====================

Link: https://patch.msgid.link/20250410014658.782120-1-kuba@kernel.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parents 4145f002 54d79085

Documentation/netlink/specs/rt_addr.yaml→Documentation/netlink/specs/rt-addr.yaml

+7 −17
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 


name: rt-addr

protocol: netlink-raw

uapi-header: linux/rtnetlink.h

protonum: 0



doc:
@@ -49,6 +50,8 @@ definitions: 
  -

    name: ifa-flags

    type: flags

    name-prefix: ifa-f-

    enum-name:

    entries:

      -

        name: secondary
@@ -124,6 +127,7 @@ attribute-sets: 
operations:

  fixed-header: ifaddrmsg

  enum-model: directional

  name-prefix: rtm-

  list:

    -

      name: newaddr
@@ -133,11 +137,6 @@ operations: 
        request:

          value: 20

          attributes: &ifaddr-all

            - ifa-family

            - ifa-flags

            - ifa-prefixlen

            - ifa-scope

            - ifa-index

            - address

            - label

            - local
@@ -150,11 +149,6 @@ operations: 
        request:

          value: 21

          attributes:

            - ifa-family

            - ifa-flags

            - ifa-prefixlen

            - ifa-scope

            - ifa-index

            - address

            - local

    -
@@ -164,8 +158,7 @@ operations: 
      dump:

        request:

          value: 22

          attributes:

            - ifa-index

          attributes: []

        reply:

          value: 20

          attributes: *ifaddr-all
@@ -177,9 +170,7 @@ operations: 
      do:

        request:

          value: 58

          attributes:

            - ifa-family

            - ifa-index

          attributes: []

        reply:

          value: 58

          attributes: &mcaddr-attrs
@@ -188,8 +179,7 @@ operations: 
      dump:

        request:

          value: 58

          attributes:

            - ifa-family

          attributes: []

        reply:

          value: 58

          attributes: *mcaddr-attrs

Documentation/netlink/specs/rt_route.yaml→Documentation/netlink/specs/rt-route.yaml

+5 −17
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 


name: rt-route

protocol: netlink-raw

uapi-header: linux/rtnetlink.h

protonum: 0



doc:
@@ -11,6 +12,7 @@ definitions: 
  -

    name: rtm-type

    name-prefix: rtn-

    enum-name:

    type: enum

    entries:

      - unspec
@@ -245,21 +247,19 @@ attribute-sets: 


operations:

  enum-model: directional

  fixed-header: rtmsg

  name-prefix: rtm-

  list:

    -

      name: getroute

      doc: Dump route information.

      attribute-set: route-attrs

      fixed-header: rtmsg

      do:

        request:

          value: 26

          attributes:

            - rtm-family

            - src

            - rtm-src-len

            - dst

            - rtm-dst-len

            - iif

            - oif

            - ip-proto
@@ -271,15 +271,6 @@ operations: 
        reply:

          value: 24

          attributes: &all-route-attrs

            - rtm-family

            - rtm-dst-len

            - rtm-src-len

            - rtm-tos

            - rtm-table

            - rtm-protocol

            - rtm-scope

            - rtm-type

            - rtm-flags

            - dst

            - src

            - iif
@@ -311,8 +302,7 @@ operations: 
      dump:

        request:

          value: 26

          attributes:

            - rtm-family

          attributes: []

        reply:

          value: 24

          attributes: *all-route-attrs
@@ -320,7 +310,6 @@ operations: 
      name: newroute

      doc: Create a new route

      attribute-set: route-attrs

      fixed-header: rtmsg

      do:

        request:

          value: 24
@@ -329,7 +318,6 @@ operations: 
      name: delroute

      doc: Delete an existing route

      attribute-set: route-attrs

      fixed-header: rtmsg

      do:

        request:

          value: 25