From 28b949885f80efb87d7cebdcf879c99db12c37bd Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Sat, 28 Feb 2009 03:23:57 +0100 Subject: [PATCH] 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: Jan Engelhardt --- 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 bc9561bdef7..41c456deba2 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 - -struct xt_mark_tginfo2 { - __u32 mark, mask; -}; +#include #endif /*_XT_MARK_H_target */ diff --git a/include/linux/netfilter/xt_mark.h b/include/linux/netfilter/xt_mark.h index 6607c8f38ea..ecadc40d5cd 100644 --- a/include/linux/netfilter/xt_mark.h +++ b/include/linux/netfilter/xt_mark.h @@ -3,6 +3,10 @@ #include +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 abf4ce6d183..236aa20ce5c 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 f873644f02f..19775cc30fe 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 225f8d11e17..00000000000 --- 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 - * Copyright © CC Computer Consultants GmbH, 2007 - 2008 - * Jan Engelhardt - * - * 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 -#include -#include -#include - -#include -#include - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Marc Boucher "); -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 1db07d8125f..035c468a004 100644 --- a/net/netfilter/xt_mark.c +++ b/net/netfilter/xt_mark.c @@ -18,9 +18,20 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Marc Boucher "); -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); -- 2.46.0