From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Phil Sutter <phil@nwl.cc>
Cc: netfilter-devel@vger.kernel.org,
Serhey Popovych <serhe.popovych@gmail.com>
Subject: Re: [iptables PATCH 3/3] libxtables: Register multiple extensions in ascending order
Date: Tue, 6 Oct 2020 01:41:21 +0200 [thread overview]
Message-ID: <20201005234121.GA14242@salvia> (raw)
In-Reply-To: <20200922225341.8976-4-phil@nwl.cc>
On Wed, Sep 23, 2020 at 12:53:41AM +0200, Phil Sutter wrote:
> The newly introduced ordered insert algorithm in
> xtables_register_{match,target}() works best if extensions of same name
> are passed in ascending revisions. Since this is the case in about all
> extensions' arrays, iterate over them from beginning to end.
This patch should come first in the series, my understanding is that
1/3 assumes that extensions are registered from lower to higher
revision number.
> Signed-off-by: Phil Sutter <phil@nwl.cc>
> ---
> libxtables/xtables.c | 14 ++++++++------
> 1 file changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/libxtables/xtables.c b/libxtables/xtables.c
> index de74d361a53af..90b1195c45a58 100644
> --- a/libxtables/xtables.c
> +++ b/libxtables/xtables.c
> @@ -1139,9 +1139,10 @@ static bool xtables_fully_register_pending_match(struct xtables_match *me,
>
> void xtables_register_matches(struct xtables_match *match, unsigned int n)
> {
> - do {
> - xtables_register_match(&match[--n]);
> - } while (n > 0);
> + int i;
> +
> + for (i = 0; i < n; i++)
> + xtables_register_match(&match[i]);
> }
>
> void xtables_register_target(struct xtables_target *me)
> @@ -1264,9 +1265,10 @@ static bool xtables_fully_register_pending_target(struct xtables_target *me,
>
> void xtables_register_targets(struct xtables_target *target, unsigned int n)
> {
> - do {
> - xtables_register_target(&target[--n]);
> - } while (n > 0);
> + int i;
> +
> + for (i = 0; i < n; i++)
> + xtables_register_target(&target[i]);
> }
>
> /* receives a list of xtables_rule_match, release them */
> --
> 2.28.0
>
next prev parent reply other threads:[~2020-10-05 23:41 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 22:53 [iptables PATCH 0/3] libxtables: Fix for pointless socket() calls Phil Sutter
2020-09-22 22:53 ` [iptables PATCH 1/3] libxtables: Make sure extensions register in revision order Phil Sutter
2020-10-03 11:17 ` Pablo Neira Ayuso
2020-10-04 14:53 ` Phil Sutter
2020-10-05 22:42 ` Pablo Neira Ayuso
2020-10-06 9:27 ` Phil Sutter
2020-10-06 9:50 ` Pablo Neira Ayuso
2020-10-06 10:13 ` Phil Sutter
2020-10-06 10:48 ` Pablo Neira Ayuso
2020-10-06 12:07 ` [iptables PATCH v2] " Phil Sutter
2020-10-06 23:59 ` Pablo Neira Ayuso
2020-09-22 22:53 ` [iptables PATCH 2/3] libxtables: Simplify pending extension registration Phil Sutter
2020-10-05 23:08 ` Pablo Neira Ayuso
2020-09-22 22:53 ` [iptables PATCH 3/3] libxtables: Register multiple extensions in ascending order Phil Sutter
2020-10-05 23:41 ` Pablo Neira Ayuso [this message]
2020-10-06 9:29 ` Phil Sutter
2020-09-23 11:45 ` [iptables PATCH 0/3] libxtables: Fix for pointless socket() calls Pablo Neira Ayuso
2020-09-23 14:30 ` Phil Sutter
2020-10-07 0:02 ` Pablo Neira Ayuso
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