[PATCH net-next v2] docs: netdev: fix iproute2 process documentation

[Willem de Bruijn <willemdebruijn.kernel@gmail.com>]

From: Willem de Bruijn <willemb@google.com>

The instructions on sending patches to iproute2 span both netdev and
bpf docs, contain outdated references and miss some instructions.
Address this:

- Move all info to maintainer-netdev
- Add a link in bpf_devel_QA to this location
- Update URLs to git repositories
- Update URLs to patchwork instance and delegates
- Update subject prefix rules
- Add suggestion to Cc: maintainers
- Add pointer to iproute2 MAINTAINERS
- Add pointer to iproute2 README.devel

Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Willem de Bruijn <willemb@google.com>
---
v2:
  - list separate patchwork delegates for iproute2 ('shemminger') and
    iproute2-next ('dsa') (Stephen)
  - Kept ast@kernel.org Ack, as no changes to the BPF portion
v1: https://lore.kernel.org/netdev/20261103033611.949104-1-willemdebruijn.kernel@gmail.com/
---
 Documentation/bpf/bpf_devel_QA.rst          | 30 ++++--------------
 Documentation/process/maintainer-netdev.rst | 35 +++++++++++++++++++++
 2 files changed, 41 insertions(+), 24 deletions(-)

diff --git a/Documentation/bpf/bpf_devel_QA.rst b/Documentation/bpf/bpf_devel_QA.rst
index 4729efd657c3..888b29599761 100644
--- a/Documentation/bpf/bpf_devel_QA.rst
+++ b/Documentation/bpf/bpf_devel_QA.rst
@@ -304,31 +304,13 @@ downstream distributions.
 
 Q: Do you accept patches as well for iproute2's BPF loader?
 -----------------------------------------------------------
-A: Patches for the iproute2's BPF loader have to be sent to:
+A: Patches for iproute2, including its BPF loader, are sent to
+netdev@vger.kernel.org. For details on iproute2 patch submission, see
+"Co-posting iproute2 patches" in Documentation/process/maintainer-netdev.rst.
 
-  netdev@vger.kernel.org
-
-While those patches are not processed by the BPF kernel maintainers,
-please keep them in Cc as well, so they can be reviewed.
-
-The official git repository for iproute2 is run by Stephen Hemminger
-and can be found at:
-
-  https://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git/
-
-The patches need to have a subject prefix of '``[PATCH iproute2
-master]``' or '``[PATCH iproute2 net-next]``'. '``master``' or
-'``net-next``' describes the target branch where the patch should be
-applied to. Meaning, if kernel changes went into the net-next kernel
-tree, then the related iproute2 changes need to go into the iproute2
-net-next branch, otherwise they can be targeted at master branch. The
-iproute2 net-next branch will get merged into the master branch after
-the current iproute2 version from master has been released.
-
-Like BPF, the patches end up in patchwork under the netdev project and
-are delegated to 'shemminger' for further processing:
-
-  http://patchwork.ozlabs.org/project/netdev/list/?delegate=389
+While iproute2 BPF loader patches are not processed by the BPF kernel
+maintainers, please Cc bpf@vger.kernel.org and the BPF maintainers for
+review.
 
 Q: What is the minimum requirement before I submit my BPF patches?
 ------------------------------------------------------------------
diff --git a/Documentation/process/maintainer-netdev.rst b/Documentation/process/maintainer-netdev.rst
index df220a965438..6a0f27778213 100644
--- a/Documentation/process/maintainer-netdev.rst
+++ b/Documentation/process/maintainer-netdev.rst
@@ -363,6 +363,41 @@ to the mailing list, e.g.::
 Posting as one thread is discouraged because it confuses patchwork
 (as of patchwork 2.2.2).
 
+Co-posting iproute2 patches
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The official git repositories for iproute2 are:
+
+- iproute2: https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
+- iproute2-next: https://git.kernel.org/pub/scm/network/iproute2/iproute2-next.git
+
+Patches for iproute2 must have a subject prefix of ``[PATCH iproute2]``
+or ``[PATCH iproute2-next]`` to indicate the target repository where the
+patch should be applied. If kernel changes target net-next or bpf-next,
+then the related iproute2 changes need to target iproute2-next, else they
+must target iproute2. The iproute2-next tree will be merged into the
+iproute2 tree after the current iproute2 version has been released.
+
+Patches are tracked in patchwork under the netdevbpf project. iproute2
+patches are delegated to 'shemminger' (Stephen Hemminger), iproute2-next
+patches to 'dsa' (David Ahern):
+
+- iproute2: https://patchwork.kernel.org/project/netdevbpf/list/?delegate=7961&state=*
+- iproute2-next: https://patchwork.kernel.org/project/netdevbpf/list/?delegate=123859&state=*
+
+Send patches to netdev@vger.kernel.org and always include the iproute2
+maintainers in the email Cc: list. See the MAINTAINERS file in the
+repository for email addresses and other details:
+
+  https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/tree/MAINTAINERS
+
+For patches that target iproute2's BPF loader, also include
+bpf@vger.kernel.org and the BPF maintainers.
+
+For more information, see also README.devel in the repository:
+
+  https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/tree/README.devel
+
 Co-posting selftests
 ~~~~~~~~~~~~~~~~~~~~
 
-- 
2.56.0.455.g6c5a503b38-goog