netdev - Re: [PATCH net-next] Doc: netlink: support unterminated-ok

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Message-ID: <20240307203524.34895501@kernel.org>
Date: Thu, 7 Mar 2024 20:35:24 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Hangbin Liu <liuhangbin@...il.com>
Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] Doc: netlink: support unterminated-ok

On Thu,  7 Mar 2024 15:01:06 +0800 Hangbin Liu wrote:
> Subject: [PATCH net-next] Doc: netlink: support unterminated-ok

I'd use this subject:

	netlink: specs: support unterminated-ok

> ynl-gen-c.py supports check unterminated-ok, but the yaml schemas don't
> have this key. Add this to the yaml files.

> diff --git a/Documentation/netlink/genetlink-c.yaml b/Documentation/netlink/genetlink-c.yaml
> index c58f7153fcf8..7094d619cbb6 100644
> --- a/Documentation/netlink/genetlink-c.yaml
> +++ b/Documentation/netlink/genetlink-c.yaml
> @@ -208,6 +208,9 @@ properties:
>                    exact-len:
>                      description: Exact length for a string or a binary attribute.
>                      $ref: '#/$defs/len-or-define'
> +                  unterminated-ok:
> +                    description: Allow the string to not use terminator.
> +                    type: boolean

Can we expand the doc a little? How about:

	description: |
		For string attributes, do not check whether attribute
		contains the terminating null character.

Also maybe let's leave this out of the spec for:

	Documentation/netlink/genetlink.yaml

that spec is supposed to be simplified, supporting both string flavors
just complicates things.