Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

Pablo Neira Ayuso says:

====================
netfilter/IPVS updates for net-next

The following patchset contains Netfilter updates for your net-next tree,
they are:

* Add full port randomization support. Some crazy researchers found a way
  to reconstruct the secure ephemeral ports that are allocated in random mode
  by sending off-path bursts of UDP packets to overrun the socket buffer of
  the DNS resolver to trigger retransmissions, then if the timing for the
  DNS resolution done by a client is larger than usual, then they conclude
  that the port that received the burst of UDP packets is the one that was
  opened. It seems a bit aggressive method to me but it seems to work for
  them. As a result, Daniel Borkmann and Hannes Frederic Sowa came up with a
  new NAT mode to fully randomize ports using prandom.

* Add a new classifier to x_tables based on the socket net_cls set via
  cgroups. These includes two patches to prepare the field as requested by
  Zefan Li. Also from Daniel Borkmann.

* Use prandom instead of get_random_bytes in several locations of the
  netfilter code, from Florian Westphal.

* Allow to use the CTA_MARK_MASK in ctnetlink when mangling the conntrack
  mark, also from Florian Westphal.

* Fix compilation warning due to unused variable in IPVS, from Geert
  Uytterhoeven.

* Add support for UID/GID via nfnetlink_queue, from Valentina Giusti.

* Add IPComp extension to x_tables, from Fan Du.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 2 insertions, 110 deletions

diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index 919847beec39..d3d7a0a66e28 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -444,6 +444,7 @@ config NET_CLS_FLOW
 config NET_CLS_CGROUP
 	tristate "Control Group Classifier"
 	select NET_CLS
+	select CGROUP_NET_CLASSID
 	depends on CGROUPS
 	---help---
 	  Say Y here if you want to classify packets based on the control
diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index f9d212583ea2..8349fcdc50f3 100644
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c
@@ -11,109 +11,13 @@
 
 #include <linux/module.h>
 #include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/errno.h>
 #include <linux/skbuff.h>
-#include <linux/cgroup.h>
 #include <linux/rcupdate.h>
-#include <linux/fdtable.h>
 #include <net/rtnetlink.h>
 #include <net/pkt_cls.h>
 #include <net/sock.h>
 #include <net/cls_cgroup.h>
 
-static inline struct cgroup_cls_state *css_cls_state(struct cgroup_subsys_state *css)
-{
-	return css ? container_of(css, struct cgroup_cls_state, css) : NULL;
-}
-
-static inline struct cgroup_cls_state *task_cls_state(struct task_struct *p)
-{
-	return css_cls_state(task_css(p, net_cls_subsys_id));
-}
-
-static struct cgroup_subsys_state *
-cgrp_css_alloc(struct cgroup_subsys_state *parent_css)
-{
-	struct cgroup_cls_state *cs;
-
-	cs = kzalloc(sizeof(*cs), GFP_KERNEL);
-	if (!cs)
-		return ERR_PTR(-ENOMEM);
-	return &cs->css;
-}
-
-static int cgrp_css_online(struct cgroup_subsys_state *css)
-{
-	struct cgroup_cls_state *cs = css_cls_state(css);
-	struct cgroup_cls_state *parent = css_cls_state(css_parent(css));
-
-	if (parent)
-		cs->classid = parent->classid;
-	return 0;
-}
-
-static void cgrp_css_free(struct cgroup_subsys_state *css)
-{
-	kfree(css_cls_state(css));
-}
-
-static int update_classid(const void *v, struct file *file, unsigned n)
-{
-	int err;
-	struct socket *sock = sock_from_file(file, &err);
-	if (sock)
-		sock->sk->sk_classid = (u32)(unsigned long)v;
-	return 0;
-}
-
-static void cgrp_attach(struct cgroup_subsys_state *css,
-			struct cgroup_taskset *tset)
-{
-	struct task_struct *p;
-	struct cgroup_cls_state *cs = css_cls_state(css);
-	void *v = (void *)(unsigned long)cs->classid;
-
-	cgroup_taskset_for_each(p, css, tset) {
-		task_lock(p);
-		iterate_fd(p->files, 0, update_classid, v);
-		task_unlock(p);
-	}
-}
-
-static u64 read_classid(struct cgroup_subsys_state *css, struct cftype *cft)
-{
-	return css_cls_state(css)->classid;
-}
-
-static int write_classid(struct cgroup_subsys_state *css, struct cftype *cft,
-			 u64 value)
-{
-	css_cls_state(css)->classid = (u32) value;
-	return 0;
-}
-
-static struct cftype ss_files[] = {
-	{
-		.name = "classid",
-		.read_u64 = read_classid,
-		.write_u64 = write_classid,
-	},
-	{ }	/* terminate */
-};
-
-struct cgroup_subsys net_cls_subsys = {
-	.name		= "net_cls",
-	.css_alloc	= cgrp_css_alloc,
-	.css_online	= cgrp_css_online,
-	.css_free	= cgrp_css_free,
-	.attach		= cgrp_attach,
-	.subsys_id	= net_cls_subsys_id,
-	.base_cftypes	= ss_files,
-	.module		= THIS_MODULE,
-};
-
 struct cls_cgroup_head {
 	u32			handle;
 	struct tcf_exts		exts;
@@ -305,25 +209,12 @@ static struct tcf_proto_ops cls_cgroup_ops __read_mostly = {
 
 static int __init init_cgroup_cls(void)
 {
-	int ret;
-
-	ret = cgroup_load_subsys(&net_cls_subsys);
-	if (ret)
-		goto out;
-
-	ret = register_tcf_proto_ops(&cls_cgroup_ops);
-	if (ret)
-		cgroup_unload_subsys(&net_cls_subsys);
-
-out:
-	return ret;
+	return register_tcf_proto_ops(&cls_cgroup_ops);
 }
 
 static void __exit exit_cgroup_cls(void)
 {
 	unregister_tcf_proto_ops(&cls_cgroup_ops);
-
-	cgroup_unload_subsys(&net_cls_subsys);
 }
 
 module_init(init_cgroup_cls);