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From: Jakub Kicinski <kuba@kernel.org>
To: "Asbjørn Sloth Tønnesen" <ast@fiberby.net>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Paolo Abeni <pabeni@redhat.com>,
	Donald Hunter <donald.hunter@gmail.com>,
	Simon Horman <horms@kernel.org>,
	Jacob Keller <jacob.e.keller@intel.com>,
	Andrew Lunn <andrew+netdev@lunn.ch>,
	wireguard@lists.zx2c4.com, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next 06/11] tools: ynl-gen: don't validate nested array attribute types
Date: Fri, 5 Sep 2025 17:23:34 -0700	[thread overview]
Message-ID: <20250905172334.0411e05e@kernel.org> (raw)
In-Reply-To: <20250904220156.1006541-6-ast@fiberby.net>

On Thu,  4 Sep 2025 22:01:29 +0000 Asbjørn Sloth Tønnesen wrote:
> In nested arrays don't require that the intermediate
> attribute type should be a valid attribute type, it
> might just be an index or simple 0, it is often not
> even used.
> 
> See include/net/netlink.h about NLA_NESTED_ARRAY:
> > The difference to NLA_NESTED is the structure:
> > NLA_NESTED has the nested attributes directly inside
> > while an array has the nested attributes at another
> > level down and the attribute types directly in the
> > nesting don't matter.  

I don't understand, please provide more details.
This is an ArrayNest, right?

[ARRAY-ATTR]
  [ENTRY]
    [MEMBER1]
    [MEMBER2]
  [ENTRY]
    [MEMBER1]
    [MEMBER2]

Which level are you saying doesn't matter?
If entry is a nest it must be a valid nest.
What the comment you're quoting is saying is that the nla_type of ENTRY
doesn't matter.

  reply	other threads:[~2025-09-06  0:23 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-04 22:01 [PATCH net-next 00/11] tools: ynl: prepare for wireguard Asbjørn Sloth Tønnesen
2025-09-04 22:01 ` [PATCH net-next 01/11] tools: ynl-gen: allow overriding name-prefix for constants Asbjørn Sloth Tønnesen
2025-09-05 10:36   ` Donald Hunter
2025-09-06  0:07   ` Jakub Kicinski
2025-09-06  0:15   ` Jacob Keller
2025-09-04 22:01 ` [PATCH net-next 02/11] tools: ynl-gen: generate nested array policies Asbjørn Sloth Tønnesen
2025-09-05 10:37   ` Donald Hunter
2025-09-06  0:09   ` Jakub Kicinski
2025-09-06  0:19   ` Jacob Keller
2025-09-06 14:13     ` Asbjørn Sloth Tønnesen
2025-09-08  7:54       ` Johannes Berg
2025-09-08  9:08         ` Asbjørn Sloth Tønnesen
2025-09-08 13:22           ` Johannes Berg
2025-09-09 23:02       ` Jacob Keller
2025-09-04 22:01 ` [PATCH net-next 03/11] tools: ynl-gen: add sub-type check Asbjørn Sloth Tønnesen
2025-09-05 10:37   ` Donald Hunter
2025-09-06  0:12   ` Jakub Kicinski
2025-09-06  0:20   ` Jacob Keller
2025-09-04 22:01 ` [PATCH net-next 04/11] tools: ynl-gen: define count iterator in print_dump() Asbjørn Sloth Tønnesen
2025-09-05 10:37   ` Donald Hunter
2025-09-06  0:13   ` Jakub Kicinski
2025-09-06  0:20   ` Jacob Keller
2025-09-04 22:01 ` [PATCH net-next 05/11] tools: ynl-gen: define nlattr *array in a block scope Asbjørn Sloth Tønnesen
2025-09-05 10:44   ` Donald Hunter
2025-09-06  0:18   ` Jakub Kicinski
2025-09-06 13:13     ` Asbjørn Sloth Tønnesen
2025-09-06 19:07       ` Jakub Kicinski
2025-09-11  0:01         ` Asbjørn Sloth Tønnesen
2025-09-11  0:27           ` Jakub Kicinski
2025-09-04 22:01 ` [PATCH net-next 06/11] tools: ynl-gen: don't validate nested array attribute types Asbjørn Sloth Tønnesen
2025-09-06  0:23   ` Jakub Kicinski [this message]
2025-09-06 13:22     ` Asbjørn Sloth Tønnesen
2025-09-06 19:29       ` Jakub Kicinski
2025-09-06  0:24   ` Jacob Keller
2025-09-06 15:10     ` Asbjørn Sloth Tønnesen
2025-09-08  7:55       ` Johannes Berg
2025-09-10 16:58       ` Jacob Keller
2025-09-04 22:01 ` [PATCH net-next 07/11] tools: ynl-gen: rename TypeArrayNest to TypeIndexedArray Asbjørn Sloth Tønnesen
2025-09-05 10:44   ` Donald Hunter
2025-09-06  0:25   ` Jakub Kicinski
2025-09-04 22:01 ` [PATCH net-next 08/11] tools: ynl: move nest packing to a helper function Asbjørn Sloth Tønnesen
2025-09-05 10:45   ` Donald Hunter
2025-09-04 22:01 ` [PATCH net-next 09/11] tools: ynl: encode indexed-array Asbjørn Sloth Tønnesen
2025-09-05 10:49   ` Donald Hunter
2025-09-05 15:34     ` Asbjørn Sloth Tønnesen
2025-09-04 22:01 ` [PATCH net-next 10/11] tools: ynl: decode hex input Asbjørn Sloth Tønnesen
2025-09-05 10:51   ` Donald Hunter
2025-09-06  0:27     ` Jacob Keller
2025-09-06 14:31       ` Asbjørn Sloth Tønnesen
2025-09-08  8:28         ` Donald Hunter
2025-09-09 18:10   ` Sabrina Dubroca
2025-09-09 20:18     ` Asbjørn Sloth Tønnesen
2025-09-04 22:01 ` [PATCH net-next 11/11] tools: ynl: add ipv4-or-v6 display hint Asbjørn Sloth Tønnesen
2025-09-05 10:53   ` Donald Hunter
2025-09-06 15:59     ` Asbjørn Sloth Tønnesen

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