[NETFILTER]: Kconfig: improve conntrack selection

Improve the connection tracking selection (well, the user experience,
not really the aesthetics) by offering one option to enable connection
tracking and a choice between the implementations.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 06fec80..7148527 100644 (file)
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -31,20 +31,6 @@ config NF_CONNTRACK_PROC_COMPAT
          If unsure, say Y.
 
 # connection tracking, helpers and protocols
-config IP_NF_CONNTRACK
-       tristate "Connection tracking (required for masq/NAT)"
-       ---help---
-         Connection tracking keeps a record of what packets have passed
-         through your machine, in order to figure out how they are related
-         into connections.
-
-         This is required to do Masquerading or other kinds of Network
-         Address Translation (except for Fast NAT).  It can also be used to
-         enhance packet filtering (see `Connection state match support'
-         below).
-
-         To compile it as a module, choose M here.  If unsure, say N.
-
 config IP_NF_CT_ACCT
        bool "Connection tracking flow accounting"
        depends on IP_NF_CONNTRACK

diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index d191dac..efe56f7 100644 (file)
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -25,19 +25,57 @@ config NETFILTER_NETLINK_LOG
          and is also scheduled to replace the old syslog-based ipt_LOG
          and ip6t_LOG modules.
 
-config NF_CONNTRACK
-       tristate "Layer 3 Independent Connection tracking (EXPERIMENTAL)"
-       depends on EXPERIMENTAL && IP_NF_CONNTRACK=n
-       default n
-       ---help---
+config NF_CONNTRACK_ENABLED
+       tristate "Netfilter connection tracking support"
+       help
          Connection tracking keeps a record of what packets have passed
          through your machine, in order to figure out how they are related
          into connections.
 
+         This is required to do Masquerading or other kinds of Network
+         Address Translation (except for Fast NAT).  It can also be used to
+         enhance packet filtering (see `Connection state match support'
+         below).
+
+         To compile it as a module, choose M here.  If unsure, say N.
+
+choice
+       prompt "Netfilter connection tracking support"
+       depends on NF_CONNTRACK_ENABLED
+
+config NF_CONNTRACK_SUPPORT
+       bool "Layer 3 Independent Connection tracking (EXPERIMENTAL)"
+       depends on EXPERIMENTAL
+       help
          Layer 3 independent connection tracking is experimental scheme
          which generalize ip_conntrack to support other layer 3 protocols.
 
-         To compile it as a module, choose M here.  If unsure, say N.
+         This is required to do Masquerading or other kinds of Network
+         Address Translation (except for Fast NAT).  It can also be used to
+         enhance packet filtering (see `Connection state match support'
+         below).
+
+config IP_NF_CONNTRACK_SUPPORT
+       bool "Layer 3 Dependent Connection tracking"
+       help
+         The old, Layer 3 dependent ip_conntrack subsystem of netfilter.
+
+         This is required to do Masquerading or other kinds of Network
+         Address Translation (except for Fast NAT).  It can also be used to
+         enhance packet filtering (see `Connection state match support'
+         below).
+
+endchoice
+
+config NF_CONNTRACK
+       tristate
+       default m if NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=m
+       default y if NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=y
+
+config IP_NF_CONNTRACK
+       tristate
+       default m if IP_NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=m
+       default y if IP_NF_CONNTRACK_SUPPORT && NF_CONNTRACK_ENABLED=y
 
 config NF_CT_ACCT
        bool "Connection tracking flow accounting"