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Commit 28b94988 authored by Jan Engelhardt's avatar Jan Engelhardt Committed by Patrick McHardy
Browse files

netfilter: xtables: merge xt_MARK into xt_mark 



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: default avatarJan Engelhardt <jengelh@medozas.de>
parent 44c58731

include/linux/netfilter/xt_MARK.h

+1 −5
Original line number Diff line number Diff line 
#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 */

include/linux/netfilter/xt_mark.h

+4 −0
Original line number Diff line number Diff line
@@ -3,6 +3,10 @@ 


#include <linux/types.h>



struct xt_mark_tginfo2 {

	__u32 mark, mask;

};



struct xt_mark_mtinfo1 {

	__u32 mark, mask;

	__u8 invert;

net/netfilter/Kconfig

+29 −17
Original line number Diff line number Diff line
@@ -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'

net/netfilter/Makefile

+3 −2
Original line number Diff line number Diff line
@@ -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

net/netfilter/xt_MARK.c

deleted100644 → 0
+0 −56
Original line number Diff line number Diff line 
/*

 *	xt_MARK - Netfilter module to modify the NFMARK field of an skb

 *

 *	(C) 1999-2001 Marc Boucher <marc@mbsi.ca>

 *	Copyright © CC Computer Consultants GmbH, 2007 - 2008

 *	Jan Engelhardt <jengelh@computergmbh.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@mbsi.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);