diff options
| -rw-r--r-- | net/key/af_key.c | 88 |
1 files changed, 73 insertions, 15 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c index ea7755ab7e6..e80b26488bb 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -27,6 +27,7 @@ #include <linux/proc_fs.h> #include <linux/init.h> #include <net/net_namespace.h> +#include <net/netns/generic.h> #include <net/xfrm.h> #include <net/sock.h> @@ -34,15 +35,16 @@ #define _X2KEY(x) ((x) == XFRM_INF ? 0 : (x)) #define _KEY2X(x) ((x) == 0 ? XFRM_INF : (x)) - -/* List of all pfkey sockets. */ -static HLIST_HEAD(pfkey_table); +static int pfkey_net_id; +struct netns_pfkey { + /* List of all pfkey sockets. */ + struct hlist_head table; + atomic_t socks_nr; +}; static DECLARE_WAIT_QUEUE_HEAD(pfkey_table_wait); static DEFINE_RWLOCK(pfkey_table_lock); static atomic_t pfkey_table_users = ATOMIC_INIT(0); -static atomic_t pfkey_socks_nr = ATOMIC_INIT(0); - struct pfkey_sock { /* struct sock must be the first member of struct pfkey_sock */ struct sock sk; @@ -89,6 +91,9 @@ static void pfkey_terminate_dump(struct pfkey_sock *pfk) static void pfkey_sock_destruct(struct sock *sk) { + struct net *net = sock_net(sk); + struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); + pfkey_terminate_dump(pfkey_sk(sk)); skb_queue_purge(&sk->sk_receive_queue); @@ -100,7 +105,7 @@ static void pfkey_sock_destruct(struct sock *sk) WARN_ON(atomic_read(&sk->sk_rmem_alloc)); WARN_ON(atomic_read(&sk->sk_wmem_alloc)); - atomic_dec(&pfkey_socks_nr); + atomic_dec(&net_pfkey->socks_nr); } static void pfkey_table_grab(void) @@ -151,8 +156,11 @@ static const struct proto_ops pfkey_ops; static void pfkey_insert(struct sock *sk) { + struct net *net = sock_net(sk); + struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); + pfkey_table_grab(); - sk_add_node(sk, &pfkey_table); + sk_add_node(sk, &net_pfkey->table); pfkey_table_ungrab(); } @@ -171,12 +179,10 @@ static struct proto key_proto = { static int pfkey_create(struct net *net, struct socket *sock, int protocol) { + struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); struct sock *sk; int err; - if (net != &init_net) - return -EAFNOSUPPORT; - if (!capable(CAP_NET_ADMIN)) return -EPERM; if (sock->type != SOCK_RAW) @@ -195,7 +201,7 @@ static int pfkey_create(struct net *net, struct socket *sock, int protocol) sk->sk_family = PF_KEY; sk->sk_destruct = pfkey_sock_destruct; - atomic_inc(&pfkey_socks_nr); + atomic_inc(&net_pfkey->socks_nr); pfkey_insert(sk); @@ -257,6 +263,8 @@ static int pfkey_broadcast_one(struct sk_buff *skb, struct sk_buff **skb2, static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, int broadcast_flags, struct sock *one_sk) { + struct net *net = &init_net; + struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); struct sock *sk; struct hlist_node *node; struct sk_buff *skb2 = NULL; @@ -269,7 +277,7 @@ static int pfkey_broadcast(struct sk_buff *skb, gfp_t allocation, return -ENOMEM; pfkey_lock_table(); - sk_for_each(sk, node, &pfkey_table) { + sk_for_each(sk, node, &net_pfkey->table) { struct pfkey_sock *pfk = pfkey_sk(sk); int err2; @@ -2943,7 +2951,10 @@ static int key_notify_sa_expire(struct xfrm_state *x, struct km_event *c) static int pfkey_send_notify(struct xfrm_state *x, struct km_event *c) { - if (atomic_read(&pfkey_socks_nr) == 0) + struct net *net = &init_net; + struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); + + if (atomic_read(&net_pfkey->socks_nr) == 0) return 0; switch (c->event) { @@ -3647,6 +3658,8 @@ static int pfkey_seq_show(struct seq_file *f, void *v) static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) { + struct net *net = &init_net; + struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); struct sock *s; struct hlist_node *node; loff_t pos = *ppos; @@ -3655,7 +3668,7 @@ static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) if (pos == 0) return SEQ_START_TOKEN; - sk_for_each(s, node, &pfkey_table) + sk_for_each(s, node, &net_pfkey->table) if (pos-- == 1) return s; @@ -3664,9 +3677,12 @@ static void *pfkey_seq_start(struct seq_file *f, loff_t *ppos) static void *pfkey_seq_next(struct seq_file *f, void *v, loff_t *ppos) { + struct net *net = &init_net; + struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); + ++*ppos; return (v == SEQ_START_TOKEN) ? - sk_head(&pfkey_table) : + sk_head(&net_pfkey->table) : sk_next((struct sock *)v); } @@ -3731,8 +3747,45 @@ static struct xfrm_mgr pfkeyv2_mgr = .migrate = pfkey_send_migrate, }; +static int __net_init pfkey_net_init(struct net *net) +{ + struct netns_pfkey *net_pfkey; + int rv; + + net_pfkey = kmalloc(sizeof(struct netns_pfkey), GFP_KERNEL); + if (!net_pfkey) { + rv = -ENOMEM; + goto out_kmalloc; + } + INIT_HLIST_HEAD(&net_pfkey->table); + atomic_set(&net_pfkey->socks_nr, 0); + rv = net_assign_generic(net, pfkey_net_id, net_pfkey); + if (rv < 0) + goto out_assign; + return 0; + +out_assign: + kfree(net_pfkey); +out_kmalloc: + return rv; +} + +static void __net_exit pfkey_net_exit(struct net *net) +{ + struct netns_pfkey *net_pfkey = net_generic(net, pfkey_net_id); + + BUG_ON(!hlist_empty(&net_pfkey->table)); + kfree(net_pfkey); +} + +static struct pernet_operations pfkey_net_ops = { + .init = pfkey_net_init, + .exit = pfkey_net_exit, +}; + static void __exit ipsec_pfkey_exit(void) { + unregister_pernet_gen_subsys(pfkey_net_id, &pfkey_net_ops); xfrm_unregister_km(&pfkeyv2_mgr); pfkey_exit_proc(); sock_unregister(PF_KEY); @@ -3755,8 +3808,13 @@ static int __init ipsec_pfkey_init(void) err = xfrm_register_km(&pfkeyv2_mgr); if (err != 0) goto out_remove_proc_entry; + err = register_pernet_gen_subsys(&pfkey_net_id, &pfkey_net_ops); + if (err != 0) + goto out_xfrm_unregister_km; out: return err; +out_xfrm_unregister_km: + xfrm_unregister_km(&pfkeyv2_mgr); out_remove_proc_entry: pfkey_exit_proc(); out_sock_unregister: |