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Diffstat (limited to 'net/ipv6/anycast.c')
-rw-r--r--net/ipv6/anycast.c99
1 files changed, 42 insertions, 57 deletions
diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index 0e5e943446f..21018324468 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -44,17 +44,17 @@
#include <net/checksum.h>
-static int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr);
+static int ipv6_dev_ac_dec(struct net_device *dev, const struct in6_addr *addr);
/* Big ac list lock for all the sockets */
-static DEFINE_RWLOCK(ipv6_sk_ac_lock);
+static DEFINE_SPINLOCK(ipv6_sk_ac_lock);
/*
* socket join an anycast group
*/
-int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
+int ipv6_sock_ac_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct net_device *dev = NULL;
@@ -64,7 +64,7 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
int ishost = !net->ipv6.devconf_all->forwarding;
int err = 0;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;
if (ipv6_addr_is_multicast(addr))
return -EINVAL;
@@ -75,7 +75,7 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
if (pac == NULL)
return -ENOMEM;
pac->acl_next = NULL;
- ipv6_addr_copy(&pac->acl_addr, addr);
+ pac->acl_addr = *addr;
rcu_read_lock();
if (ifindex == 0) {
@@ -83,8 +83,8 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
rt = rt6_lookup(net, addr, NULL, 0, 0);
if (rt) {
- dev = rt->rt6i_dev;
- dst_release(&rt->dst);
+ dev = rt->dst.dev;
+ ip6_rt_put(rt);
} else if (ishost) {
err = -EADDRNOTAVAIL;
goto error;
@@ -128,10 +128,10 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
err = ipv6_dev_ac_inc(dev, addr);
if (!err) {
- write_lock_bh(&ipv6_sk_ac_lock);
+ spin_lock_bh(&ipv6_sk_ac_lock);
pac->acl_next = np->ipv6_ac_list;
np->ipv6_ac_list = pac;
- write_unlock_bh(&ipv6_sk_ac_lock);
+ spin_unlock_bh(&ipv6_sk_ac_lock);
pac = NULL;
}
@@ -145,14 +145,14 @@ error:
/*
* socket leave an anycast group
*/
-int ipv6_sock_ac_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
+int ipv6_sock_ac_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct net_device *dev;
struct ipv6_ac_socklist *pac, *prev_pac;
struct net *net = sock_net(sk);
- write_lock_bh(&ipv6_sk_ac_lock);
+ spin_lock_bh(&ipv6_sk_ac_lock);
prev_pac = NULL;
for (pac = np->ipv6_ac_list; pac; pac = pac->acl_next) {
if ((ifindex == 0 || pac->acl_ifindex == ifindex) &&
@@ -161,7 +161,7 @@ int ipv6_sock_ac_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
prev_pac = pac;
}
if (!pac) {
- write_unlock_bh(&ipv6_sk_ac_lock);
+ spin_unlock_bh(&ipv6_sk_ac_lock);
return -ENOENT;
}
if (prev_pac)
@@ -169,7 +169,7 @@ int ipv6_sock_ac_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
else
np->ipv6_ac_list = pac->acl_next;
- write_unlock_bh(&ipv6_sk_ac_lock);
+ spin_unlock_bh(&ipv6_sk_ac_lock);
rcu_read_lock();
dev = dev_get_by_index_rcu(net, pac->acl_ifindex);
@@ -189,10 +189,13 @@ void ipv6_sock_ac_close(struct sock *sk)
struct net *net = sock_net(sk);
int prev_index;
- write_lock_bh(&ipv6_sk_ac_lock);
+ if (!np->ipv6_ac_list)
+ return;
+
+ spin_lock_bh(&ipv6_sk_ac_lock);
pac = np->ipv6_ac_list;
np->ipv6_ac_list = NULL;
- write_unlock_bh(&ipv6_sk_ac_lock);
+ spin_unlock_bh(&ipv6_sk_ac_lock);
prev_index = 0;
rcu_read_lock();
@@ -211,35 +214,6 @@ void ipv6_sock_ac_close(struct sock *sk)
rcu_read_unlock();
}
-#if 0
-/* The function is not used, which is funny. Apparently, author
- * supposed to use it to filter out datagrams inside udp/raw but forgot.
- *
- * It is OK, anycasts are not special comparing to delivery to unicasts.
- */
-
-int inet6_ac_check(struct sock *sk, struct in6_addr *addr, int ifindex)
-{
- struct ipv6_ac_socklist *pac;
- struct ipv6_pinfo *np = inet6_sk(sk);
- int found;
-
- found = 0;
- read_lock(&ipv6_sk_ac_lock);
- for (pac=np->ipv6_ac_list; pac; pac=pac->acl_next) {
- if (ifindex && pac->acl_ifindex != ifindex)
- continue;
- found = ipv6_addr_equal(&pac->acl_addr, addr);
- if (found)
- break;
- }
- read_unlock(&ipv6_sk_ac_lock);
-
- return found;
-}
-
-#endif
-
static void aca_put(struct ifacaddr6 *ac)
{
if (atomic_dec_and_test(&ac->aca_refcnt)) {
@@ -252,7 +226,7 @@ static void aca_put(struct ifacaddr6 *ac)
/*
* device anycast group inc (add if not found)
*/
-int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr)
+int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr)
{
struct ifacaddr6 *aca;
struct inet6_dev *idev;
@@ -289,14 +263,14 @@ int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr)
goto out;
}
- rt = addrconf_dst_alloc(idev, addr, 1);
+ rt = addrconf_dst_alloc(idev, addr, true);
if (IS_ERR(rt)) {
kfree(aca);
err = PTR_ERR(rt);
goto out;
}
- ipv6_addr_copy(&aca->aca_addr, addr);
+ aca->aca_addr = *addr;
aca->aca_idev = idev;
aca->aca_rt = rt;
aca->aca_users = 1;
@@ -324,7 +298,7 @@ out:
/*
* device anycast group decrement
*/
-int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr)
+int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr)
{
struct ifacaddr6 *aca, *prev_aca;
@@ -358,7 +332,7 @@ int __ipv6_dev_ac_dec(struct inet6_dev *idev, struct in6_addr *addr)
}
/* called with rcu_read_lock() */
-static int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr)
+static int ipv6_dev_ac_dec(struct net_device *dev, const struct in6_addr *addr)
{
struct inet6_dev *idev = __in6_dev_get(dev);
@@ -371,7 +345,7 @@ static int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr)
* check if the interface has this anycast address
* called with rcu_read_lock()
*/
-static int ipv6_chk_acast_dev(struct net_device *dev, struct in6_addr *addr)
+static bool ipv6_chk_acast_dev(struct net_device *dev, const struct in6_addr *addr)
{
struct inet6_dev *idev;
struct ifacaddr6 *aca;
@@ -385,16 +359,16 @@ static int ipv6_chk_acast_dev(struct net_device *dev, struct in6_addr *addr)
read_unlock_bh(&idev->lock);
return aca != NULL;
}
- return 0;
+ return false;
}
/*
* check if given interface (or any, if dev==0) has this anycast address
*/
-int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
- struct in6_addr *addr)
+bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
+ const struct in6_addr *addr)
{
- int found = 0;
+ bool found = false;
rcu_read_lock();
if (dev)
@@ -402,13 +376,24 @@ int ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
else
for_each_netdev_rcu(net, dev)
if (ipv6_chk_acast_dev(dev, addr)) {
- found = 1;
+ found = true;
break;
}
rcu_read_unlock();
return found;
}
+/* check if this anycast address is link-local on given interface or
+ * is global
+ */
+bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
+ const struct in6_addr *addr)
+{
+ return ipv6_chk_acast_addr(net,
+ (ipv6_addr_type(addr) & IPV6_ADDR_LINKLOCAL ?
+ dev : NULL),
+ addr);
+}
#ifdef CONFIG_PROC_FS
struct ac6_iter_state {
@@ -535,7 +520,7 @@ static const struct file_operations ac6_seq_fops = {
int __net_init ac6_proc_init(struct net *net)
{
- if (!proc_net_fops_create(net, "anycast6", S_IRUGO, &ac6_seq_fops))
+ if (!proc_create("anycast6", S_IRUGO, net->proc_net, &ac6_seq_fops))
return -ENOMEM;
return 0;
@@ -543,7 +528,7 @@ int __net_init ac6_proc_init(struct net *net)
void ac6_proc_exit(struct net *net)
{
- proc_net_remove(net, "anycast6");
+ remove_proc_entry("anycast6", net->proc_net);
}
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 13:08:08 +0000