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From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Phil Sutter <phil@nwl.cc>
Cc: netfilter-devel@vger.kernel.org
Subject: Re: [iptables PATCH v2 01/10] nft: Fix selective chain compatibility checks
Date: Mon, 12 Oct 2020 13:54:24 +0200
Message-ID: <20201012115424.GA26845@salvia> (raw)
In-Reply-To: <20200923174849.5773-2-phil@nwl.cc>

On Wed, Sep 23, 2020 at 07:48:40PM +0200, Phil Sutter wrote:
> Since commit 80251bc2a56ed ("nft: remove cache build calls"), 'chain'
> parameter passed to nft_chain_list_get() is no longer effective. To
> still support running nft_is_chain_compatible() on specific chains only,
> add a short path to nft_is_table_compatible().
> 
> Follow-up patches will kill nft_chain_list_get(), so don't bother
> dropping the unused parameter from its signature.

This has a Fixes: tag.

What is precisely the problem? How does show from the iptables and
iptables-restore interface?

Not sure I understand the problem.

> Fixes: 80251bc2a56ed ("nft: remove cache build calls")
> Signed-off-by: Phil Sutter <phil@nwl.cc>
> ---
>  iptables/nft.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/iptables/nft.c b/iptables/nft.c
> index 27bb98d184c7c..669e29d4cf88f 100644
> --- a/iptables/nft.c
> +++ b/iptables/nft.c
> @@ -3453,6 +3453,12 @@ bool nft_is_table_compatible(struct nft_handle *h,
>  {
>  	struct nftnl_chain_list *clist;
>  
> +	if (chain) {
> +		struct nftnl_chain *c = nft_chain_find(h, table, chain);
> +
> +		return c && !nft_is_chain_compatible(c, h);
> +	}
> +
>  	clist = nft_chain_list_get(h, table, chain);
>  	if (clist == NULL)
>  		return false;
> -- 
> 2.28.0
> 

  reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-23 17:48 [iptables PATCH v2 00/10] nft: Sorted chain listing et al Phil Sutter
2020-09-23 17:48 ` [iptables PATCH v2 01/10] nft: Fix selective chain compatibility checks Phil Sutter
2020-10-12 11:54   ` Pablo Neira Ayuso [this message]
2020-10-13  9:29     ` Phil Sutter
2020-09-23 17:48 ` [iptables PATCH v2 02/10] nft: Implement nft_chain_foreach() Phil Sutter
2020-10-12 12:01   ` Pablo Neira Ayuso
2020-10-13  9:40     ` Phil Sutter
2020-09-23 17:48 ` [iptables PATCH v2 03/10] nft: cache: Introduce nft_cache_add_chain() Phil Sutter
2020-10-12 12:02   ` Pablo Neira Ayuso
2020-09-23 17:48 ` [iptables PATCH v2 04/10] nft: Eliminate nft_chain_list_get() Phil Sutter
2020-10-12 12:03   ` Pablo Neira Ayuso
2020-10-13  9:44     ` Phil Sutter
2020-09-23 17:48 ` [iptables PATCH v2 05/10] nft: cache: Move nft_chain_find() over Phil Sutter
2020-09-23 17:48 ` [iptables PATCH v2 06/10] nft: Introduce struct nft_chain Phil Sutter
2020-10-12 12:08   ` Pablo Neira Ayuso
2020-10-13  9:56     ` Phil Sutter
2020-09-23 17:48 ` [iptables PATCH v2 07/10] nft: Introduce a dedicated base chain array Phil Sutter
2020-09-23 17:48 ` [iptables PATCH v2 08/10] nft: cache: Sort custom chains by name Phil Sutter
2020-09-23 17:48 ` [iptables PATCH v2 09/10] tests: shell: Drop any dump sorting in place Phil Sutter
2020-09-23 17:48 ` [iptables PATCH v2 10/10] nft: Avoid pointless table/chain creation Phil Sutter

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