iptables/SOURCES/0015-libxtables-Register-multiple-extensions-in-ascending.patch

From 1ae06e3a2da1c21a75b55609b99d1ab3ef6cf709 Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Tue, 22 Sep 2020 20:01:15 +0200
Subject: [PATCH] libxtables: Register multiple extensions in ascending order

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.

Signed-off-by: Phil Sutter <phil@nwl.cc>
(cherry picked from commit b5f1a3beac1d1f2b96c8be8ebec450f5ea758090)
---
 libxtables/xtables.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/libxtables/xtables.c b/libxtables/xtables.c
index 10d4e70328500..7152c6576cd63 100644
--- a/libxtables/xtables.c
+++ b/libxtables/xtables.c
@@ -1141,9 +1141,10 @@ 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)
@@ -1269,9 +1270,10 @@ 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 */
-- 
2.40.0