netdev - Re: [PATCH net-next 00/13] tools: ynl: more docs and basic ethtool support

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Date:   Mon, 30 Jan 2023 11:36:23 -0800
From:   Stanislav Fomichev <sdf@...gle.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
        pabeni@...hat.com
Subject: Re: [PATCH net-next 00/13] tools: ynl: more docs and basic ethtool support

On 01/27, Jakub Kicinski wrote:
> I got discouraged from supporting ethtool in specs, because
> generating the user space C code seems a little tricky.
> The messages are ID'ed in a "directional" way (to and from
> kernel are separate ID "spaces"). There is value, however,
> in having the spec and being able to for example use it
> in Python.

> After paying off some technical debt - add a partial
> ethtool spec. Partial because the header for ethtool is almost
> a 1000 LoC, so converting in one sitting is tough. But adding
> new commands should be trivial now.

> Last but not least I add more docs, I realized that I've been
> sending a similar "instructions" email to people working on
> new families. It's now intro-specs.rst.

FWIW, I've played with it a bit and left some nits in the doc:

Acked-by: Stanislav Fomichev <sdf@...gle.com>

One unrelated thing that maybe worth mentioning is that /usr/bin/python
is no more on Debian and there is only /usr/bin/python3, so maybe worth
changing the /usr/bin/env shebang to python3? (although I'm not sure
what's the story overall with 2->3 migration; archlinux has a  
python->python3
symlink).

> Jakub Kicinski (13):
>    tools: ynl-gen: prevent do / dump reordering
>    tools: ynl: move the cli and netlink code around
>    tools: ynl: add an object hierarchy to represent parsed spec
>    tools: ynl: use the common YAML loading and validation code
>    tools: ynl: add support for types needed by ethtool
>    tools: ynl: support directional enum-model in CLI
>    tools: ynl: support multi-attr
>    tools: ynl: support pretty printing bad attribute names
>    tools: ynl: use operation names from spec on the CLI
>    tools: ynl: load jsonschema on demand
>    netlink: specs: finish up operation enum-models
>    netlink: specs: add partial specification for ethtool
>    docs: netlink: add a starting guide for working with specs

>   Documentation/netlink/genetlink-c.yaml        |   4 +-
>   Documentation/netlink/genetlink-legacy.yaml   |  11 +-
>   Documentation/netlink/genetlink.yaml          |   4 +-
>   Documentation/netlink/specs/ethtool.yaml      | 392 ++++++++++++++++++
>   .../netlink/genetlink-legacy.rst              |  82 ++++
>   Documentation/userspace-api/netlink/index.rst |   1 +
>   .../userspace-api/netlink/intro-specs.rst     |  80 ++++
>   Documentation/userspace-api/netlink/specs.rst |   3 +
>   tools/net/ynl/{samples => }/cli.py            |  15 +-
>   tools/net/ynl/lib/__init__.py                 |   7 +
>   tools/net/ynl/lib/nlspec.py                   | 310 ++++++++++++++
>   tools/net/ynl/{samples => lib}/ynl.py         | 192 +++++----
>   tools/net/ynl/ynl-gen-c.py                    | 260 ++++++------
>   13 files changed, 1107 insertions(+), 254 deletions(-)
>   create mode 100644 Documentation/netlink/specs/ethtool.yaml
>   create mode 100644 Documentation/userspace-api/netlink/intro-specs.rst
>   rename tools/net/ynl/{samples => }/cli.py (78%)
>   create mode 100644 tools/net/ynl/lib/__init__.py
>   create mode 100644 tools/net/ynl/lib/nlspec.py
>   rename tools/net/ynl/{samples => lib}/ynl.py (79%)

> --
> 2.39.1