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Commit a6483b79 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by David S. Miller
Browse files

netns xfrm: per-netns NETLINK_XFRM socket 



Stub senders to init_net's one temporarily.

Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bd235e3c

include/net/netns/xfrm.h

+2 −0
Original line number Diff line number Diff line
@@ -39,6 +39,8 @@ struct netns_xfrm { 
	struct xfrm_policy_hash	policy_bydst[XFRM_POLICY_MAX * 2];

	unsigned int		policy_count[XFRM_POLICY_MAX * 2];

	struct work_struct	policy_hash_work;



	struct sock		*nlsk;

};



#endif

include/net/xfrm.h

+4 −3
Original line number Diff line number Diff line
@@ -48,7 +48,6 @@ DECLARE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics); 
#define XFRM_INC_STATS_USER(field)

#endif



extern struct sock *xfrm_nl;

extern u32 sysctl_xfrm_aevent_etime;

extern u32 sysctl_xfrm_aevent_rseqth;

extern int sysctl_xfrm_larval_drop;
@@ -1516,18 +1515,20 @@ static inline int xfrm_policy_id2dir(u32 index) 
	return index & 7;

}



static inline int xfrm_aevent_is_on(void)

#ifdef CONFIG_XFRM

static inline int xfrm_aevent_is_on(struct net *net)

{

	struct sock *nlsk;

	int ret = 0;



	rcu_read_lock();

	nlsk = rcu_dereference(xfrm_nl);

	nlsk = rcu_dereference(net->xfrm.nlsk);

	if (nlsk)

		ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);

	rcu_read_unlock();

	return ret;

}

#endif



static inline int xfrm_alg_len(struct xfrm_algo *alg)

{

net/xfrm/xfrm_output.c

+2 −1
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err) 
{

	struct dst_entry *dst = skb->dst;

	struct xfrm_state *x = dst->xfrm;

	struct net *net = xs_net(x);



	if (err <= 0)

		goto resume;
@@ -74,7 +75,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err) 
				err = -EOVERFLOW;

				goto error;

			}

			if (xfrm_aevent_is_on())

			if (xfrm_aevent_is_on(net))

				xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);

		}

net/xfrm/xfrm_state.c

+2 −5
Original line number Diff line number Diff line
@@ -24,9 +24,6 @@ 


#include "xfrm_hash.h"



struct sock *xfrm_nl;

EXPORT_SYMBOL(xfrm_nl);



u32 sysctl_xfrm_aevent_etime __read_mostly = XFRM_AE_ETIME;

EXPORT_SYMBOL(sysctl_xfrm_aevent_etime);
@@ -1659,7 +1656,7 @@ static void xfrm_replay_timer_handler(unsigned long data) 
	spin_lock(&x->lock);



	if (x->km.state == XFRM_STATE_VALID) {

		if (xfrm_aevent_is_on())

		if (xfrm_aevent_is_on(xs_net(x)))

			xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);

		else

			x->xflags |= XFRM_TIME_DEFER;
@@ -1715,7 +1712,7 @@ void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq) 
		x->replay.bitmap |= (1U << diff);

	}



	if (xfrm_aevent_is_on())

	if (xfrm_aevent_is_on(xs_net(x)))

		xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);

}

net/xfrm/xfrm_user.c

+73 −35
Original line number Diff line number Diff line
@@ -703,6 +703,7 @@ nla_put_failure: 
static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,

		struct nlattr **attrs)

{

	struct net *net = sock_net(skb->sk);

	struct sk_buff *r_skb;

	u32 *flags = nlmsg_data(nlh);

	u32 spid = NETLINK_CB(skb).pid;
@@ -715,7 +716,7 @@ static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 
	if (build_spdinfo(r_skb, spid, seq, *flags) < 0)

		BUG();



	return nlmsg_unicast(xfrm_nl, r_skb, spid);

	return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);

}



static inline size_t xfrm_sadinfo_msgsize(void)
@@ -756,6 +757,7 @@ nla_put_failure: 
static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,

		struct nlattr **attrs)

{

	struct net *net = sock_net(skb->sk);

	struct sk_buff *r_skb;

	u32 *flags = nlmsg_data(nlh);

	u32 spid = NETLINK_CB(skb).pid;
@@ -768,12 +770,13 @@ static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, 
	if (build_sadinfo(r_skb, spid, seq, *flags) < 0)

		BUG();



	return nlmsg_unicast(xfrm_nl, r_skb, spid);

	return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);

}



static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,

		struct nlattr **attrs)

{

	struct net *net = &init_net;

	struct xfrm_usersa_id *p = nlmsg_data(nlh);

	struct xfrm_state *x;

	struct sk_buff *resp_skb;
@@ -787,7 +790,7 @@ static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, 
	if (IS_ERR(resp_skb)) {

		err = PTR_ERR(resp_skb);

	} else {

		err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);

		err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);

	}

	xfrm_state_put(x);

out_noput:
@@ -820,6 +823,7 @@ static int verify_userspi_info(struct xfrm_userspi_info *p) 
static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,

		struct nlattr **attrs)

{

	struct net *net = &init_net;

	struct xfrm_state *x;

	struct xfrm_userspi_info *p;

	struct sk_buff *resp_skb;
@@ -837,7 +841,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, 


	x = NULL;

	if (p->info.seq) {

		x = xfrm_find_acq_byseq(&init_net, p->info.seq);

		x = xfrm_find_acq_byseq(net, p->info.seq);

		if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {

			xfrm_state_put(x);

			x = NULL;
@@ -845,7 +849,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, 
	}



	if (!x)

		x = xfrm_find_acq(&init_net, p->info.mode, p->info.reqid,

		x = xfrm_find_acq(net, p->info.mode, p->info.reqid,

				  p->info.id.proto, daddr,

				  &p->info.saddr, 1,

				  family);
@@ -863,7 +867,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, 
		goto out;

	}



	err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);

	err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);



out:

	xfrm_state_put(x);
@@ -1311,6 +1315,7 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, 
static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,

		struct nlattr **attrs)

{

	struct net *net = &init_net;

	struct xfrm_policy *xp;

	struct xfrm_userpolicy_id *p;

	u8 type = XFRM_POLICY_TYPE_MAIN;
@@ -1330,7 +1335,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 
		return err;



	if (p->index)

		xp = xfrm_policy_byid(&init_net, type, p->dir, p->index, delete, &err);

		xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err);

	else {

		struct nlattr *rt = attrs[XFRMA_SEC_CTX];

		struct xfrm_sec_ctx *ctx;
@@ -1347,7 +1352,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 
			if (err)

				return err;

		}

		xp = xfrm_policy_bysel_ctx(&init_net, type, p->dir, &p->sel, ctx,

		xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx,

					   delete, &err);

		security_xfrm_policy_free(ctx);

	}
@@ -1361,7 +1366,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, 
		if (IS_ERR(resp_skb)) {

			err = PTR_ERR(resp_skb);

		} else {

			err = nlmsg_unicast(xfrm_nl, resp_skb,

			err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,

					    NETLINK_CB(skb).pid);

		}

	} else {
@@ -1457,6 +1462,7 @@ nla_put_failure: 
static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,

		struct nlattr **attrs)

{

	struct net *net = &init_net;

	struct xfrm_state *x;

	struct sk_buff *r_skb;

	int err;
@@ -1468,7 +1474,7 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 
	if (r_skb == NULL)

		return -ENOMEM;



	x = xfrm_state_lookup(&init_net, &id->daddr, id->spi, id->proto, id->family);

	x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family);

	if (x == NULL) {

		kfree_skb(r_skb);

		return -ESRCH;
@@ -1486,7 +1492,7 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, 


	if (build_aevent(r_skb, x, &c) < 0)

		BUG();

	err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);

	err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);

	spin_unlock_bh(&x->lock);

	xfrm_state_put(x);

	return err;
@@ -1869,6 +1875,7 @@ static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 
			     struct xfrm_migrate *m, int num_migrate,

			     struct xfrm_kmaddress *k)

{

	struct net *net = &init_net;

	struct sk_buff *skb;



	skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
@@ -1879,7 +1886,7 @@ static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, 
	if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)

		BUG();



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);

}

#else

static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
@@ -1968,6 +1975,7 @@ static struct xfrm_link { 


static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)

{

	struct net *net = sock_net(skb->sk);

	struct nlattr *attrs[XFRMA_MAX+1];

	struct xfrm_link *link;

	int type, err;
@@ -1989,7 +1997,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 
		if (link->dump == NULL)

			return -EINVAL;



		return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, link->done);

		return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);

	}



	err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
@@ -2033,6 +2041,7 @@ static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_eve 


static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)

{

	struct net *net = &init_net;

	struct sk_buff *skb;



	skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
@@ -2042,11 +2051,12 @@ static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) 
	if (build_expire(skb, x, c) < 0)

		BUG();



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);

}



static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)

{

	struct net *net = &init_net;

	struct sk_buff *skb;



	skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
@@ -2056,11 +2066,12 @@ static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) 
	if (build_aevent(skb, x, c) < 0)

		BUG();



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);

}



static int xfrm_notify_sa_flush(struct km_event *c)

{

	struct net *net = &init_net;

	struct xfrm_usersa_flush *p;

	struct nlmsghdr *nlh;

	struct sk_buff *skb;
@@ -2081,7 +2092,7 @@ static int xfrm_notify_sa_flush(struct km_event *c) 


	nlmsg_end(skb, nlh);



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);

}



static inline size_t xfrm_sa_len(struct xfrm_state *x)
@@ -2111,6 +2122,7 @@ static inline size_t xfrm_sa_len(struct xfrm_state *x) 


static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)

{

	struct net *net = &init_net;

	struct xfrm_usersa_info *p;

	struct xfrm_usersa_id *id;

	struct nlmsghdr *nlh;
@@ -2155,7 +2167,7 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) 


	nlmsg_end(skb, nlh);



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);



nla_put_failure:

	/* Somebody screwed up with xfrm_sa_len! */
@@ -2235,6 +2247,7 @@ nlmsg_failure: 
static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,

			     struct xfrm_policy *xp, int dir)

{

	struct net *net = xs_net(x);

	struct sk_buff *skb;



	skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
@@ -2244,7 +2257,7 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, 
	if (build_acquire(skb, x, xt, xp, dir) < 0)

		BUG();



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);

}



/* User gives us xfrm_user_policy_info followed by an array of 0
@@ -2344,6 +2357,7 @@ nlmsg_failure: 


static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)

{

	struct net *net = &init_net;

	struct sk_buff *skb;



	skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
@@ -2353,11 +2367,12 @@ static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_eve 
	if (build_polexpire(skb, xp, dir, c) < 0)

		BUG();



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);

}



static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)

{

	struct net *net = &init_net;

	struct xfrm_userpolicy_info *p;

	struct xfrm_userpolicy_id *id;

	struct nlmsghdr *nlh;
@@ -2408,7 +2423,7 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event * 


	nlmsg_end(skb, nlh);



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);



nlmsg_failure:

	kfree_skb(skb);
@@ -2417,6 +2432,7 @@ nlmsg_failure: 


static int xfrm_notify_policy_flush(struct km_event *c)

{

	struct net *net = &init_net;

	struct nlmsghdr *nlh;

	struct sk_buff *skb;
@@ -2432,7 +2448,7 @@ static int xfrm_notify_policy_flush(struct km_event *c) 


	nlmsg_end(skb, nlh);



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);



nlmsg_failure:

	kfree_skb(skb);
@@ -2491,6 +2507,7 @@ nla_put_failure: 
static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,

			    xfrm_address_t *addr)

{

	struct net *net = &init_net;

	struct sk_buff *skb;



	skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
@@ -2500,7 +2517,7 @@ static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, 
	if (build_report(skb, proto, sel, addr) < 0)

		BUG();



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);

}



static inline size_t xfrm_mapping_msgsize(void)
@@ -2536,6 +2553,7 @@ static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, 
static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,

			     __be16 sport)

{

	struct net *net = xs_net(x);

	struct sk_buff *skb;



	if (x->id.proto != IPPROTO_ESP)
@@ -2551,7 +2569,7 @@ static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, 
	if (build_mapping(skb, x, ipaddr, sport) < 0)

		BUG();



	return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);

	return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);

}



static struct xfrm_mgr netlink_mgr = {
@@ -2565,33 +2583,53 @@ static struct xfrm_mgr netlink_mgr = { 
	.new_mapping	= xfrm_send_mapping,

};



static int __init xfrm_user_init(void)

static int __net_init xfrm_user_net_init(struct net *net)

{

	struct sock *nlsk;



	printk(KERN_INFO "Initializing XFRM netlink socket\n");



	nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX,

	nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,

				     xfrm_netlink_rcv, NULL, THIS_MODULE);

	if (nlsk == NULL)

		return -ENOMEM;

	rcu_assign_pointer(xfrm_nl, nlsk);



	xfrm_register_km(&netlink_mgr);



	rcu_assign_pointer(net->xfrm.nlsk, nlsk);

	return 0;

}



static void __exit xfrm_user_exit(void)

static void __net_exit xfrm_user_net_exit(struct net *net)

{

	struct sock *nlsk = xfrm_nl;

	struct sock *nlsk = net->xfrm.nlsk;



	xfrm_unregister_km(&netlink_mgr);

	rcu_assign_pointer(xfrm_nl, NULL);

	rcu_assign_pointer(net->xfrm.nlsk, NULL);

	synchronize_rcu();

	netlink_kernel_release(nlsk);

}



static struct pernet_operations xfrm_user_net_ops = {

	.init = xfrm_user_net_init,

	.exit = xfrm_user_net_exit,

};



static int __init xfrm_user_init(void)

{

	int rv;



	printk(KERN_INFO "Initializing XFRM netlink socket\n");



	rv = register_pernet_subsys(&xfrm_user_net_ops);

	if (rv < 0)

		return rv;

	rv = xfrm_register_km(&netlink_mgr);

	if (rv < 0)

		unregister_pernet_subsys(&xfrm_user_net_ops);

	return rv;

}



static void __exit xfrm_user_exit(void)

{

	xfrm_unregister_km(&netlink_mgr);

	unregister_pernet_subsys(&xfrm_user_net_ops);

}



module_init(xfrm_user_init);

module_exit(xfrm_user_exit);

MODULE_LICENSE("GPL");