kernel: generic: Add kernel 4.14 support

This adds initial support for kernel 4.14 based on the patches for
kernel 4.9.

In the configuration I deactivated some of the new possible security
features like:
CONFIG_REFCOUNT_FULL
CONFIG_SLAB_FREELIST_HARDENED
CONFIG_SOFTLOCKUP_DETECTOR
CONFIG_WARN_ALL_UNSEEDED_RANDOM

And these overlay FS options are also deactivated:
CONFIG_OVERLAY_FS_INDEX
CONFIG_OVERLAY_FS_REDIRECT_DIR

I activated this:
CONFIG_FORTIFY_SOURCE
CONFIG_POSIX_TIMERS
CONFIG_SLAB_MERGE_DEFAULT
CONFIG_WATCHDOG_HANDLE_BOOT_ENABLED

I am not sure if I did the porting correct for the following patches:
target/linux/generic/backport-4.14/020-backport_netfilter_rtcache.patch
target/linux/generic/hack-4.14/220-gc_sections.patch
target/linux/generic/hack-4.14/321-powerpc_crtsavres_prereq.patch
target/linux/generic/pending-4.14/305-mips_module_reloc.patch
target/linux/generic/pending-4.14/611-netfilter_match_bypass_default_table.patch
target/linux/generic/pending-4.14/680-NET-skip-GRO-for-foreign-MAC-addresses.patch

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 136 insertions, 0 deletions

diff --git a/target/linux/generic/hack-4.14/901-debloat_sock_diag.patch b/target/linux/generic/hack-4.14/901-debloat_sock_diag.patch
new file mode 100644
index 0000000000..d854865d60
--- /dev/null
+++ b/target/linux/generic/hack-4.14/901-debloat_sock_diag.patch
@@ -0,0 +1,136 @@
+From 3b6115d6b57a263bdc8c9b1df273bd4a7955eead Mon Sep 17 00:00:00 2001
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sat, 8 Jul 2017 08:16:31 +0200
+Subject: debloat: add some debloat patches, strip down procfs and make O_DIRECT support optional, saves ~15K after lzma on MIPS
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ net/Kconfig         | 3 +++
+ net/core/Makefile   | 3 ++-
+ net/core/sock.c     | 2 ++
+ net/ipv4/Kconfig    | 1 +
+ net/netlink/Kconfig | 1 +
+ net/packet/Kconfig  | 1 +
+ net/unix/Kconfig    | 1 +
+ 7 files changed, 11 insertions(+), 1 deletion(-)
+
+--- a/net/Kconfig
++++ b/net/Kconfig
+@@ -97,6 +97,9 @@ source "net/netlabel/Kconfig"
+ 
+ endif # if INET
+ 
++config SOCK_DIAG
++	bool
++
+ config NETWORK_SECMARK
+ 	bool "Security Marking"
+ 	help
+--- a/net/core/Makefile
++++ b/net/core/Makefile
+@@ -10,9 +10,10 @@ obj-$(CONFIG_SYSCTL) += sysctl_net_core.
+ 
+ obj-y		     += dev.o ethtool.o dev_addr_lists.o dst.o netevent.o \
+ 			neighbour.o rtnetlink.o utils.o link_watch.o filter.o \
+-			sock_diag.o dev_ioctl.o tso.o sock_reuseport.o \
++ 			dev_ioctl.o tso.o sock_reuseport.o \
+ 			fib_notifier.o
+ 
++obj-$(CONFIG_SOCK_DIAG) += sock_diag.o 
+ obj-y += net-sysfs.o
+ obj-$(CONFIG_PROC_FS) += net-procfs.o
+ obj-$(CONFIG_NET_PKTGEN) += pktgen.o
+--- a/net/core/sock.c
++++ b/net/core/sock.c
+@@ -528,6 +528,18 @@ discard_and_relse:
+ }
+ EXPORT_SYMBOL(__sk_receive_skb);
+ 
++u64 sock_gen_cookie(struct sock *sk)
++{
++	while (1) {
++		u64 res = atomic64_read(&sk->sk_cookie);
++
++		if (res)
++			return res;
++		res = atomic64_inc_return(&sock_net(sk)->cookie_gen);
++		atomic64_cmpxchg(&sk->sk_cookie, 0, res);
++	}
++}
++
+ struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie)
+ {
+ 	struct dst_entry *dst = __sk_dst_get(sk);
+@@ -1597,9 +1609,11 @@ void sk_destruct(struct sock *sk)
+ 
+ static void __sk_free(struct sock *sk)
+ {
++#ifdef CONFIG_SOCK_DIAG
+ 	if (unlikely(sock_diag_has_destroy_listeners(sk) && sk->sk_net_refcnt))
+ 		sock_diag_broadcast_destroy(sk);
+ 	else
++#endif
+ 		sk_destruct(sk);
+ }
+ 
+--- a/net/core/sock_diag.c
++++ b/net/core/sock_diag.c
+@@ -19,18 +19,6 @@ static int (*inet_rcv_compat)(struct sk_
+ static DEFINE_MUTEX(sock_diag_table_mutex);
+ static struct workqueue_struct *broadcast_wq;
+ 
+-u64 sock_gen_cookie(struct sock *sk)
+-{
+-	while (1) {
+-		u64 res = atomic64_read(&sk->sk_cookie);
+-
+-		if (res)
+-			return res;
+-		res = atomic64_inc_return(&sock_net(sk)->cookie_gen);
+-		atomic64_cmpxchg(&sk->sk_cookie, 0, res);
+-	}
+-}
+-
+ int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie)
+ {
+ 	u64 res;
+--- a/net/ipv4/Kconfig
++++ b/net/ipv4/Kconfig
+@@ -420,6 +420,7 @@ config INET_XFRM_MODE_BEET
+ 
+ config INET_DIAG
+ 	tristate "INET: socket monitoring interface"
++	select SOCK_DIAG
+ 	default y
+ 	---help---
+ 	  Support for INET (TCP, DCCP, etc) socket monitoring interface used by
+--- a/net/netlink/Kconfig
++++ b/net/netlink/Kconfig
+@@ -4,6 +4,7 @@
+ 
+ config NETLINK_DIAG
+ 	tristate "NETLINK: socket monitoring interface"
++	select SOCK_DIAG
+ 	default n
+ 	---help---
+ 	  Support for NETLINK socket monitoring interface used by the ss tool.
+--- a/net/packet/Kconfig
++++ b/net/packet/Kconfig
+@@ -18,6 +18,7 @@ config PACKET
+ config PACKET_DIAG
+ 	tristate "Packet: sockets monitoring interface"
+ 	depends on PACKET
++	select SOCK_DIAG
+ 	default n
+ 	---help---
+ 	  Support for PF_PACKET sockets monitoring interface used by the ss tool.
+--- a/net/unix/Kconfig
++++ b/net/unix/Kconfig
+@@ -22,6 +22,7 @@ config UNIX
+ config UNIX_DIAG
+ 	tristate "UNIX: socket monitoring interface"
+ 	depends on UNIX
++	select SOCK_DIAG
+ 	default n
+ 	---help---
+ 	  Support for UNIX socket monitoring interface used by the ss tool.