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Commit c8a627ed authored by Gao feng's avatar Gao feng Committed by David S. Miller
Browse files

inetpeer: add namespace support for inetpeer 



now inetpeer doesn't support namespace,the information will
be leaking across namespace.

this patch move the global vars v4_peers and v6_peers to
netns_ipv4 and netns_ipv6 as a field peers.

add struct pernet_operations inetpeer_ops to initial pernet
inetpeer data.

and change family_to_base and inet_getpeer to support namespace.

Signed-off-by: default avatarGao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1578e777

include/net/inetpeer.h

+6 −4
Original line number Diff line number Diff line
@@ -75,7 +75,9 @@ static inline bool inet_metrics_new(const struct inet_peer *p) 
}



/* can be called with or without local BH being disabled */

struct inet_peer	*inet_getpeer(const struct inetpeer_addr *daddr, int create);

struct inet_peer *inet_getpeer(struct net *net,

			       const struct inetpeer_addr *daddr,

			       int create);



static inline struct inet_peer *inet_getpeer_v4(__be32 v4daddr, int create)

{
@@ -83,7 +85,7 @@ static inline struct inet_peer *inet_getpeer_v4(__be32 v4daddr, int create) 


	daddr.addr.a4 = v4daddr;

	daddr.family = AF_INET;

	return inet_getpeer(&daddr, create);

	return inet_getpeer(&init_net, &daddr, create);

}



static inline struct inet_peer *inet_getpeer_v6(const struct in6_addr *v6daddr, int create)
@@ -92,14 +94,14 @@ static inline struct inet_peer *inet_getpeer_v6(const struct in6_addr *v6daddr, 


	*(struct in6_addr *)daddr.addr.a6 = *v6daddr;

	daddr.family = AF_INET6;

	return inet_getpeer(&daddr, create);

	return inet_getpeer(&init_net, &daddr, create);

}



/* can be called from BH context or outside */

extern void inet_putpeer(struct inet_peer *p);

extern bool inet_peer_xrlim_allow(struct inet_peer *peer, int timeout);



extern void inetpeer_invalidate_tree(int family);

extern void inetpeer_invalidate_tree(struct net *net, int family);



/*

 * temporary check to make sure we dont access rid, ip_id_count, tcp_ts,

include/net/netns/ipv4.h

+1 −1
Original line number Diff line number Diff line
@@ -30,7 +30,7 @@ struct netns_ipv4 { 


	struct sock		**icmp_sk;

	struct sock		*tcp_sock;



	struct inet_peer_base	*peers;

	struct netns_frags	frags;

#ifdef CONFIG_NETFILTER

	struct xt_table		*iptable_filter;

include/net/netns/ipv6.h

+1 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ struct netns_ipv6 { 
	struct netns_sysctl_ipv6 sysctl;

	struct ipv6_devconf	*devconf_all;

	struct ipv6_devconf	*devconf_dflt;

	struct inet_peer_base	*peers;

	struct netns_frags	frags;

#ifdef CONFIG_NETFILTER

	struct xt_table		*ip6table_filter;

net/ipv4/inetpeer.c

+50 −18
Original line number Diff line number Diff line
@@ -88,18 +88,6 @@ struct inet_peer_base { 
	int		total;

};



static struct inet_peer_base v4_peers = {

	.root		= peer_avl_empty_rcu,

	.lock		= __SEQLOCK_UNLOCKED(v4_peers.lock),

	.total		= 0,

};



static struct inet_peer_base v6_peers = {

	.root		= peer_avl_empty_rcu,

	.lock		= __SEQLOCK_UNLOCKED(v6_peers.lock),

	.total		= 0,

};



#define PEER_MAXDEPTH 40 /* sufficient for about 2^27 nodes */



/* Exported for sysctl_net_ipv4.  */
@@ -153,6 +141,46 @@ static void inetpeer_gc_worker(struct work_struct *work) 
	schedule_delayed_work(&gc_work, gc_delay);

}



static int __net_init inetpeer_net_init(struct net *net)

{

	net->ipv4.peers = kzalloc(sizeof(struct inet_peer_base),

				  GFP_KERNEL);

	if (net->ipv4.peers == NULL)

		return -ENOMEM;



	net->ipv4.peers->root = peer_avl_empty_rcu;

	seqlock_init(&net->ipv4.peers->lock);



	net->ipv6.peers = kzalloc(sizeof(struct inet_peer_base),

				  GFP_KERNEL);

	if (net->ipv6.peers == NULL)

		goto out_ipv6;



	net->ipv6.peers->root = peer_avl_empty_rcu;

	seqlock_init(&net->ipv6.peers->lock);



	return 0;

out_ipv6:

	kfree(net->ipv4.peers);

	return -ENOMEM;

}



static void __net_exit inetpeer_net_exit(struct net *net)

{

	inetpeer_invalidate_tree(net, AF_INET);

	kfree(net->ipv4.peers);

	net->ipv4.peers = NULL;



	inetpeer_invalidate_tree(net, AF_INET6);

	kfree(net->ipv6.peers);

	net->ipv6.peers = NULL;

}



static struct pernet_operations inetpeer_ops = {

	.init = inetpeer_net_init,

	.exit = inetpeer_net_exit,

};



/* Called from ip_output.c:ip_init  */

void __init inet_initpeers(void)

{
@@ -177,6 +205,7 @@ void __init inet_initpeers(void) 
			NULL);



	INIT_DELAYED_WORK_DEFERRABLE(&gc_work, inetpeer_gc_worker);

	register_pernet_subsys(&inetpeer_ops);

}



static int addr_compare(const struct inetpeer_addr *a,
@@ -401,9 +430,10 @@ static void unlink_from_pool(struct inet_peer *p, struct inet_peer_base *base, 
	call_rcu(&p->rcu, inetpeer_free_rcu);

}



static struct inet_peer_base *family_to_base(int family)

static struct inet_peer_base *family_to_base(struct net *net,

					     int family)

{

	return family == AF_INET ? &v4_peers : &v6_peers;

	return family == AF_INET ? net->ipv4.peers : net->ipv6.peers;

}



/* perform garbage collect on all items stacked during a lookup */
@@ -443,10 +473,12 @@ static int inet_peer_gc(struct inet_peer_base *base, 
	return cnt;

}



struct inet_peer *inet_getpeer(const struct inetpeer_addr *daddr, int create)

struct inet_peer *inet_getpeer(struct net *net,

			       const struct inetpeer_addr *daddr,

			       int create)

{

	struct inet_peer __rcu **stack[PEER_MAXDEPTH], ***stackptr;

	struct inet_peer_base *base = family_to_base(daddr->family);

	struct inet_peer_base *base = family_to_base(net, daddr->family);

	struct inet_peer *p;

	unsigned int sequence;

	int invalidated, gccnt = 0;
@@ -571,10 +603,10 @@ static void inetpeer_inval_rcu(struct rcu_head *head) 
	schedule_delayed_work(&gc_work, gc_delay);

}



void inetpeer_invalidate_tree(int family)

void inetpeer_invalidate_tree(struct net *net, int family)

{

	struct inet_peer *old, *new, *prev;

	struct inet_peer_base *base = family_to_base(family);

	struct inet_peer_base *base = family_to_base(net, family);



	write_seqlock_bh(&base->lock);

net/ipv4/route.c

+1 −1
Original line number Diff line number Diff line
@@ -938,7 +938,7 @@ static void rt_cache_invalidate(struct net *net) 


	get_random_bytes(&shuffle, sizeof(shuffle));

	atomic_add(shuffle + 1U, &net->ipv4.rt_genid);

	inetpeer_invalidate_tree(AF_INET);

	inetpeer_invalidate_tree(net, AF_INET);

}



/*