[LEDE-DEV] [PATCH] Add ip_vs kernel netfilter modules to enable load balancing capabilities

[Mauro Mozzarelli]

Author: Mauro Mozzarelli <mauro at ezplanet.org>
Date:   Sun Feb 19 11:33:23 2017 +0000

     IPVS (IP Virtual Server) implements transport-layer load balancing 
inside the Linux kernel, so called Layer-4 switching. IPVS running on a 
host acts as a load balancer at the front of a cluster of real servers, 
it can direct requests for TCP/UDP based services to the real servers, 
and makes services of the real servers to appear as a virtual service on 
a single IP address.

     This patch adds kmod-nf-ipvs kernel modules option to LEDE kernel 
netfilter

     Signed-off-by: Mauro Mozzarelli <mauro at ezplanet.org>

diff --git a/package/kernel/linux/modules/netfilter.mk 
b/package/kernel/linux/modules/netfilter.mk
index 6162dbc..7c51d9f 100644
--- a/package/kernel/linux/modules/netfilter.mk
+++ b/package/kernel/linux/modules/netfilter.mk
@@ -271,6 +271,117 @@ define KernelPackage/ipt-ipset
  endef
  $(eval $(call KernelPackage,ipt-ipset))

+IPVS_K3_MODULES:= \
+    ip_vs \
+    ip_vs_lc \
+    ip_vs_wlc \
+    ip_vs_rr \
+    ip_vs_wrr \
+    ip_vs_lblc \
+    ip_vs_lblcr \
+    ip_vs_dh \
+    ip_vs_sh \
+    ip_vs_fo \
+    ip_vs_nq \
+    ip_vs_sed \
+    ip_vs_ftp
+
+define KernelPackage/nf-ipvs
+  SUBMENU:=Netfilter Extensions
+  TITLE:=IP Virtual Server modules Kernel 3
+  DEPENDS:=+kmod-lib-crc32c @(LINUX_3_18)
+  KCONFIG:= \
+    CONFIG_IP_VS \
+    CONFIG_IP_VS_IPV6=y \
+    CONFIG_IP_VS_DEBUG=n \
+    CONFIG_IP_VS_PROTO_TCP=y \
+    CONFIG_IP_VS_PROTO_UDP=y \
+    CONFIG_IP_VS_PROTO_AH_ESP=y \
+    CONFIG_IP_VS_PROTO_ESP=y \
+    CONFIG_IP_VS_PROTO_AH=y \
+    CONFIG_IP_VS_PROTO_SCTP=y \
+    CONFIG_IP_VS_TAB_BITS=12 \
+    CONFIG_IP_VS_RR \
+    CONFIG_IP_VS_WRR \
+    CONFIG_IP_VS_LC \
+    CONFIG_IP_VS_WLC \
+    CONFIG_IP_VS_FO \
+    CONFIG_IP_VS_OVF \
+    CONFIG_IP_VS_LBLC \
+    CONFIG_IP_VS_LBLCR \
+    CONFIG_IP_VS_DH \
+    CONFIG_IP_VS_SH \
+    CONFIG_IP_VS_SED \
+    CONFIG_IP_VS_NQ \
+    CONFIG_IP_VS_SH_TAB_BITS=8 \
+    CONFIG_IP_VS_NFCT=n \
+    CONFIG_IP_VS_FTP=m \
+    CONFIG_NETFILTER_XT_MATCH_IPVS=n
+
+  FILES:=$(foreach 
mod,$(IPVS_K3_MODULES),$(LINUX_DIR)/net/netfilter/ipvs/$(mod).ko)
+  $(call AddDepends/ipt,+kmod-ipt-conntrack)
+endef
+$(eval $(call KernelPackage,nf-ipvs))
+
+define KernelPackage/nf-ipvs/description
+ IPVS (IP Virtual Server) implements transport-layer load balancing 
inside the Linux kernel
+ so called Layer-4 switching.
+endef
+
+IPVS_K4_MODULES:= \
+    ip_vs \
+    ip_vs_lc \
+    ip_vs_wlc \
+    ip_vs_rr \
+    ip_vs_wrr \
+    ip_vs_lblc \
+    ip_vs_lblcr \
+    ip_vs_dh \
+    ip_vs_sh \
+    ip_vs_fo \
+    ip_vs_nq \
+    ip_vs_sed
+
+define KernelPackage/nf-ipvs
+  SUBMENU:=Netfilter Extensions
+  TITLE:=IP Virtual Server modules
+  DEPENDS:=+kmod-lib-crc32c @!(LINUX_3_18)
+  KCONFIG:= \
+    CONFIG_IP_VS \
+    CONFIG_IP_VS_IPV6=y \
+    CONFIG_IP_VS_DEBUG=n \
+    CONFIG_IP_VS_PROTO_TCP=y \
+    CONFIG_IP_VS_PROTO_UDP=y \
+    CONFIG_IP_VS_PROTO_AH_ESP=y \
+    CONFIG_IP_VS_PROTO_ESP=y \
+    CONFIG_IP_VS_PROTO_AH=y \
+    CONFIG_IP_VS_PROTO_SCTP=y \
+    CONFIG_IP_VS_TAB_BITS=12 \
+    CONFIG_IP_VS_RR \
+    CONFIG_IP_VS_WRR \
+    CONFIG_IP_VS_LC \
+    CONFIG_IP_VS_WLC \
+    CONFIG_IP_VS_FO \
+    CONFIG_IP_VS_OVF \
+    CONFIG_IP_VS_LBLC \
+    CONFIG_IP_VS_LBLCR \
+    CONFIG_IP_VS_DH \
+    CONFIG_IP_VS_SH \
+    CONFIG_IP_VS_SED \
+    CONFIG_IP_VS_NQ \
+    CONFIG_IP_VS_SH_TAB_BITS=8 \
+    CONFIG_IP_VS_NFCT=n \
+    CONFIG_NETFILTER_XT_MATCH_IPVS=n
+
+  FILES:=$(foreach 
mod,$(IPVS_K4_MODULES),$(LINUX_DIR)/net/netfilter/ipvs/$(mod).ko)
+  $(call AddDepends/ipt,+kmod-ipt-conntrack)
+endef
+$(eval $(call KernelPackage,nf-ipvs))
+
+define KernelPackage/nf-ipvs/description
+ IPVS (IP Virtual Server) implements transport-layer load balancing 
inside the Linux kernel
+ so called Layer-4 switching.
+endef

  define KernelPackage/ipt-nat
    TITLE:=Basic NAT targets