kernel: remove handling of xfrm[4|6]_mode_* modules

For kernel versions before 5.2, the required IPsec modes have to be
enabled explicitly (they are built-in for newer kernels).

Commit 1556ed155a9a ("kernel: mode_beet mode_transport mode_tunnel xfram
modules") tried to handle this, but it does not really work.

Since we don't support these kernel versions anymore and the code is
also broken, let's remove it.

Signed-off-by: Martin Schiller <[email protected]>
[Remove old generic config options too]
Signed-off-by: Hauke Mehrtens <[email protected]>

package/kernel/linux/modules/netsupport.mk

@@ -215,10 +215,8 @@ $(eval $(call KernelPackage,ipsec))
 IPSEC4-m = \
 	ipv4/ah4 \
 	ipv4/esp4 \
-	ipv4/xfrm4_tunnel \
 	ipv4/ipcomp \
-
-IPSEC4-m += $(ifeq ($$(strip $$(call CompareKernelPatchVer,$$(KERNEL_PATCHVER),le,5.2))),ipv4/xfrm4_mode_beet ipv4/xfrm4_mode_transport ipv4/xfrm4_mode_tunnel)
+	ipv4/xfrm4_tunnel
 
 define KernelPackage/ipsec4
   SUBMENU:=$(NETWORK_SUPPORT_MENU)
@@ -228,9 +226,6 @@ define KernelPackage/ipsec4
 	CONFIG_INET_AH \
 	CONFIG_INET_ESP \
 	CONFIG_INET_IPCOMP \
-	CONFIG_INET_XFRM_MODE_BEET \
-	CONFIG_INET_XFRM_MODE_TRANSPORT \
-	CONFIG_INET_XFRM_MODE_TUNNEL \
 	CONFIG_INET_XFRM_TUNNEL \
 	CONFIG_INET_ESP_OFFLOAD=n
   FILES:=$(foreach mod,$(IPSEC4-m),$(LINUX_DIR)/net/$(mod).ko)
@@ -255,10 +250,8 @@ $(eval $(call KernelPackage,ipsec4))
 IPSEC6-m = \
 	ipv6/ah6 \
 	ipv6/esp6 \
-	ipv6/xfrm6_tunnel \
 	ipv6/ipcomp6 \
-
-IPSEC6-m += $(ifeq ($$(strip $$(call CompareKernelPatchVer,$$(KERNEL_PATCHVER),le,5.2))),ipv6/xfrm6_mode_beet ipv6/xfrm6_mode_transport ipv6/xfrm6_mode_tunnel)
+	ipv6/xfrm6_tunnel
 
 define KernelPackage/ipsec6
   SUBMENU:=$(NETWORK_SUPPORT_MENU)
@@ -268,9 +261,6 @@ define KernelPackage/ipsec6
 	CONFIG_INET6_AH \
 	CONFIG_INET6_ESP \
 	CONFIG_INET6_IPCOMP \
-	CONFIG_INET6_XFRM_MODE_BEET \
-	CONFIG_INET6_XFRM_MODE_TRANSPORT \
-	CONFIG_INET6_XFRM_MODE_TUNNEL \
 	CONFIG_INET6_XFRM_TUNNEL \
 	CONFIG_INET6_ESP_OFFLOAD=n
   FILES:=$(foreach mod,$(IPSEC6-m),$(LINUX_DIR)/net/$(mod).ko)

target/linux/generic/config-5.10

@@ -2554,9 +2554,6 @@ CONFIG_INET=y
 # CONFIG_INET_TCP_DIAG is not set
 # CONFIG_INET_TUNNEL is not set
 # CONFIG_INET_UDP_DIAG is not set
-# CONFIG_INET_XFRM_MODE_BEET is not set
-# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
-# CONFIG_INET_XFRM_MODE_TUNNEL is not set
 # CONFIG_INET_XFRM_TUNNEL is not set
 # CONFIG_INFINIBAND is not set
 # CONFIG_INFTL is not set

target/linux/generic/config-5.15

@@ -2655,9 +2655,6 @@ CONFIG_INET=y
 # CONFIG_INET_TCP_DIAG is not set
 # CONFIG_INET_TUNNEL is not set
 # CONFIG_INET_UDP_DIAG is not set
-# CONFIG_INET_XFRM_MODE_BEET is not set
-# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
-# CONFIG_INET_XFRM_MODE_TUNNEL is not set
 # CONFIG_INET_XFRM_TUNNEL is not set
 # CONFIG_INFINIBAND is not set
 # CONFIG_INFTL is not set