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Date: Mon, 10 May 2010 22:17:39 +0200
From: kaber@...sh.net
To: davem@...emloft.net
Cc: netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH 08/84] netfilter: xtables: merge xt_MARK into xt_mark
From: Jan Engelhardt <jengelh@...ozas.de>
Two arguments for combining the two:
- xt_mark is pretty useless without xt_MARK
- the actual code is so small anyway that the kmod metadata and the module
in its loaded state totally outweighs the combined actual code size.
i586-before:
-rw-r--r-- 1 jengelh users 3821 Feb 10 01:01 xt_MARK.ko
-rw-r--r-- 1 jengelh users 2592 Feb 10 00:04 xt_MARK.o
-rw-r--r-- 1 jengelh users 3274 Feb 10 01:01 xt_mark.ko
-rw-r--r-- 1 jengelh users 2108 Feb 10 00:05 xt_mark.o
text data bss dec hex filename
354 264 0 618 26a xt_MARK.o
223 176 0 399 18f xt_mark.o
And the runtime size is like 14 KB.
i586-after:
-rw-r--r-- 1 jengelh users 3264 Feb 18 17:28 xt_mark.o
Signed-off-by: Jan Engelhardt <jengelh@...ozas.de>
---
include/linux/netfilter/xt_MARK.h | 6 +---
include/linux/netfilter/xt_mark.h | 4 ++
net/netfilter/Kconfig | 46 +++++++++++++++++++-----------
net/netfilter/Makefile | 5 ++-
net/netfilter/xt_MARK.c | 56 -------------------------------------
net/netfilter/xt_mark.c | 35 +++++++++++++++++++++-
6 files changed, 70 insertions(+), 82 deletions(-)
delete mode 100644 net/netfilter/xt_MARK.c
diff --git a/include/linux/netfilter/xt_MARK.h b/include/linux/netfilter/xt_MARK.h
index bc9561b..41c456d 100644
--- a/include/linux/netfilter/xt_MARK.h
+++ b/include/linux/netfilter/xt_MARK.h
@@ -1,10 +1,6 @@
#ifndef _XT_MARK_H_target
#define _XT_MARK_H_target
-#include <linux/types.h>
-
-struct xt_mark_tginfo2 {
- __u32 mark, mask;
-};
+#include <linux/netfilter/xt_mark.h>
#endif /*_XT_MARK_H_target */
diff --git a/include/linux/netfilter/xt_mark.h b/include/linux/netfilter/xt_mark.h
index 6607c8f..ecadc40 100644
--- a/include/linux/netfilter/xt_mark.h
+++ b/include/linux/netfilter/xt_mark.h
@@ -3,6 +3,10 @@
#include <linux/types.h>
+struct xt_mark_tginfo2 {
+ __u32 mark, mask;
+};
+
struct xt_mark_mtinfo1 {
__u32 mark, mask;
__u8 invert;
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index abf4ce6..236aa20 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -314,6 +314,23 @@ config NETFILTER_XTABLES
if NETFILTER_XTABLES
+comment "Xtables combined modules"
+
+config NETFILTER_XT_MARK
+ tristate 'nfmark target and match support'
+ default m if NETFILTER_ADVANCED=n
+ ---help---
+ This option adds the "MARK" target and "mark" match.
+
+ Netfilter mark matching allows you to match packets based on the
+ "nfmark" value in the packet.
+ The target allows you to create rules in the "mangle" table which alter
+ the netfilter mark (nfmark) field associated with the packet.
+
+ Prior to routing, the nfmark can influence the routing method (see
+ "Use netfilter MARK value as routing key") and can also be used by
+ other subsystems to change their behavior.
+
# alphabetically ordered list of targets
comment "Xtables targets"
@@ -425,16 +442,12 @@ config NETFILTER_XT_TARGET_LED
config NETFILTER_XT_TARGET_MARK
tristate '"MARK" target support'
- default m if NETFILTER_ADVANCED=n
- help
- This option adds a `MARK' target, which allows you to create rules
- in the `mangle' table which alter the netfilter mark (nfmark) field
- associated with the packet prior to routing. This can change
- the routing method (see `Use netfilter MARK value as routing
- key') and can also be used by other subsystems to change their
- behavior.
-
- To compile it as a module, choose M here. If unsure, say N.
+ depends on NETFILTER_ADVANCED
+ select NETFILTER_XT_MARK
+ ---help---
+ This is a backwards-compat option for the user's convenience
+ (e.g. when running oldconfig). It selects
+ CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
config NETFILTER_XT_TARGET_NFLOG
tristate '"NFLOG" target support'
@@ -739,13 +752,12 @@ config NETFILTER_XT_MATCH_MAC
config NETFILTER_XT_MATCH_MARK
tristate '"mark" match support'
- default m if NETFILTER_ADVANCED=n
- help
- Netfilter mark matching allows you to match packets based on the
- `nfmark' value in the packet. This can be set by the MARK target
- (see below).
-
- To compile it as a module, choose M here. If unsure, say N.
+ depends on NETFILTER_ADVANCED
+ select NETFILTER_XT_MARK
+ ---help---
+ This is a backwards-compat option for the user's convenience
+ (e.g. when running oldconfig). It selects
+ CONFIG_NETFILTER_XT_MARK (combined mark/MARK module).
config NETFILTER_XT_MATCH_MULTIPORT
tristate '"multiport" Multiple port match support'
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index f873644..19775cc 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -40,6 +40,9 @@ obj-$(CONFIG_NETFILTER_TPROXY) += nf_tproxy_core.o
# generic X tables
obj-$(CONFIG_NETFILTER_XTABLES) += x_tables.o xt_tcpudp.o
+# combos
+obj-$(CONFIG_NETFILTER_XT_MARK) += xt_mark.o
+
# targets
obj-$(CONFIG_NETFILTER_XT_TARGET_CLASSIFY) += xt_CLASSIFY.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMARK) += xt_CONNMARK.o
@@ -48,7 +51,6 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CT) += xt_CT.o
obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
obj-$(CONFIG_NETFILTER_XT_TARGET_HL) += xt_HL.o
obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
-obj-$(CONFIG_NETFILTER_XT_TARGET_MARK) += xt_MARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NOTRACK) += xt_NOTRACK.o
@@ -76,7 +78,6 @@ obj-$(CONFIG_NETFILTER_XT_MATCH_IPRANGE) += xt_iprange.o
obj-$(CONFIG_NETFILTER_XT_MATCH_LENGTH) += xt_length.o
obj-$(CONFIG_NETFILTER_XT_MATCH_LIMIT) += xt_limit.o
obj-$(CONFIG_NETFILTER_XT_MATCH_MAC) += xt_mac.o
-obj-$(CONFIG_NETFILTER_XT_MATCH_MARK) += xt_mark.o
obj-$(CONFIG_NETFILTER_XT_MATCH_MULTIPORT) += xt_multiport.o
obj-$(CONFIG_NETFILTER_XT_MATCH_OSF) += xt_osf.o
obj-$(CONFIG_NETFILTER_XT_MATCH_OWNER) += xt_owner.o
diff --git a/net/netfilter/xt_MARK.c b/net/netfilter/xt_MARK.c
deleted file mode 100644
index 225f8d1..0000000
--- a/net/netfilter/xt_MARK.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * xt_MARK - Netfilter module to modify the NFMARK field of an skb
- *
- * (C) 1999-2001 Marc Boucher <marc@...i.ca>
- * Copyright © CC Computer Consultants GmbH, 2007 - 2008
- * Jan Engelhardt <jengelh@...putergmbh.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <net/checksum.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter/xt_MARK.h>
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Marc Boucher <marc@...i.ca>");
-MODULE_DESCRIPTION("Xtables: packet mark modification");
-MODULE_ALIAS("ipt_MARK");
-MODULE_ALIAS("ip6t_MARK");
-
-static unsigned int
-mark_tg(struct sk_buff *skb, const struct xt_target_param *par)
-{
- const struct xt_mark_tginfo2 *info = par->targinfo;
-
- skb->mark = (skb->mark & ~info->mask) ^ info->mark;
- return XT_CONTINUE;
-}
-
-static struct xt_target mark_tg_reg __read_mostly = {
- .name = "MARK",
- .revision = 2,
- .family = NFPROTO_UNSPEC,
- .target = mark_tg,
- .targetsize = sizeof(struct xt_mark_tginfo2),
- .me = THIS_MODULE,
-};
-
-static int __init mark_tg_init(void)
-{
- return xt_register_target(&mark_tg_reg);
-}
-
-static void __exit mark_tg_exit(void)
-{
- xt_unregister_target(&mark_tg_reg);
-}
-
-module_init(mark_tg_init);
-module_exit(mark_tg_exit);
diff --git a/net/netfilter/xt_mark.c b/net/netfilter/xt_mark.c
index 1db07d8..035c468 100644
--- a/net/netfilter/xt_mark.c
+++ b/net/netfilter/xt_mark.c
@@ -18,9 +18,20 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marc Boucher <marc@...i.ca>");
-MODULE_DESCRIPTION("Xtables: packet mark match");
+MODULE_DESCRIPTION("Xtables: packet mark operations");
MODULE_ALIAS("ipt_mark");
MODULE_ALIAS("ip6t_mark");
+MODULE_ALIAS("ipt_MARK");
+MODULE_ALIAS("ip6t_MARK");
+
+static unsigned int
+mark_tg(struct sk_buff *skb, const struct xt_target_param *par)
+{
+ const struct xt_mark_tginfo2 *info = par->targinfo;
+
+ skb->mark = (skb->mark & ~info->mask) ^ info->mark;
+ return XT_CONTINUE;
+}
static bool
mark_mt(const struct sk_buff *skb, const struct xt_match_param *par)
@@ -30,6 +41,15 @@ mark_mt(const struct sk_buff *skb, const struct xt_match_param *par)
return ((skb->mark & info->mask) == info->mark) ^ info->invert;
}
+static struct xt_target mark_tg_reg __read_mostly = {
+ .name = "MARK",
+ .revision = 2,
+ .family = NFPROTO_UNSPEC,
+ .target = mark_tg,
+ .targetsize = sizeof(struct xt_mark_tginfo2),
+ .me = THIS_MODULE,
+};
+
static struct xt_match mark_mt_reg __read_mostly = {
.name = "mark",
.revision = 1,
@@ -41,12 +61,23 @@ static struct xt_match mark_mt_reg __read_mostly = {
static int __init mark_mt_init(void)
{
- return xt_register_match(&mark_mt_reg);
+ int ret;
+
+ ret = xt_register_target(&mark_tg_reg);
+ if (ret < 0)
+ return ret;
+ ret = xt_register_match(&mark_mt_reg);
+ if (ret < 0) {
+ xt_unregister_target(&mark_tg_reg);
+ return ret;
+ }
+ return 0;
}
static void __exit mark_mt_exit(void)
{
xt_unregister_match(&mark_mt_reg);
+ xt_unregister_target(&mark_tg_reg);
}
module_init(mark_mt_init);
--
1.7.0.4
--
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