#include <linux/route.h>
#include <linux/inetdevice.h>
#include <linux/init.h>
+#include <linux/slab.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif
#define INFINITY_LIFE_TIME 0xFFFFFFFF
#define TIME_DELTA(a, b) ((unsigned long)((long)(a) - (long)(b)))
+#define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1)
+#define ADDRCONF_TIMER_FUZZ (HZ / 4)
+#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
+
#ifdef CONFIG_SYSCTL
static void addrconf_sysctl_register(struct inet6_dev *idev);
static void addrconf_sysctl_unregister(struct inet6_dev *idev);
static void inet6_prefix_notify(int event, struct inet6_dev *idev,
struct prefix_info *pinfo);
-static int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
- struct net_device *dev);
+static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
+ struct net_device *dev);
static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
break;
}
- list_add(&ifp->if_list, p);
+ list_add_tail(&ifp->if_list, p);
}
static u32 ipv6_addr_hash(const struct in6_addr *addr)
* We perform the hash function over the last 64 bits of the address
* This will include the IEEE address token on links that support it.
*/
- return jhash_2words(addr->s6_addr32[2], addr->s6_addr32[3], 0)
+ return jhash_2words((__force u32)addr->s6_addr32[2],
+ (__force u32)addr->s6_addr32[3], 0)
& (IN6_ADDR_HSIZE - 1);
}
hash = ipv6_addr_hash(addr);
hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
- in6_ifa_hold(ifa);
spin_unlock(&addrconf_hash_lock);
write_lock(&idev->lock);
spin_lock_bh(&addrconf_hash_lock);
hlist_del_init_rcu(&ifp->addr_lst);
- __in6_ifa_put(ifp);
spin_unlock_bh(&addrconf_hash_lock);
write_lock_bh(&idev->lock);
}
EXPORT_SYMBOL(ipv6_chk_addr);
-static
-int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
- struct net_device *dev)
+static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
+ struct net_device *dev)
{
+ unsigned int hash = ipv6_addr_hash(addr);
struct inet6_ifaddr *ifp;
struct hlist_node *node;
- unsigned int hash = ipv6_addr_hash(addr);
hlist_for_each_entry(ifp, node, &inet6_addr_lst[hash], addr_lst) {
if (!net_eq(dev_net(ifp->idev->dev), net))
continue;
if (ipv6_addr_equal(&ifp->addr, addr)) {
if (dev == NULL || ifp->idev->dev == dev)
- break;
+ return true;
}
}
- return ifp != NULL;
+ return false;
}
int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
struct net_device *dev, int strict)
{
- struct inet6_ifaddr *ifp = NULL;
- struct hlist_node *node;
+ struct inet6_ifaddr *ifp, *result = NULL;
unsigned int hash = ipv6_addr_hash(addr);
+ struct hlist_node *node;
rcu_read_lock_bh();
- hlist_for_each_entry_rcu(ifp, node, &inet6_addr_lst[hash], addr_lst) {
+ hlist_for_each_entry_rcu_bh(ifp, node, &inet6_addr_lst[hash], addr_lst) {
if (!net_eq(dev_net(ifp->idev->dev), net))
continue;
if (ipv6_addr_equal(&ifp->addr, addr)) {
if (dev == NULL || ifp->idev->dev == dev ||
!(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
+ result = ifp;
in6_ifa_hold(ifp);
break;
}
}
rcu_read_unlock_bh();
- return ifp;
+ return result;
}
/* Gets referenced address, destroys ifaddr */
/* Flag it for later restoration when link comes up */
ifa->flags |= IFA_F_TENTATIVE;
in6_ifa_hold(ifa);
+ write_unlock_bh(&idev->lock);
} else {
list_del(&ifa->if_list);
ifa->dead = 1;
- }
- write_unlock_bh(&idev->lock);
+ write_unlock_bh(&idev->lock);
- /* clear hash table */
- spin_lock_bh(&addrconf_hash_lock);
- hlist_del_init_rcu(&ifa->addr_lst);
- __in6_ifa_put(ifa);
- spin_unlock_bh(&addrconf_hash_lock);
+ /* clear hash table */
+ spin_lock_bh(&addrconf_hash_lock);
+ hlist_del_init_rcu(&ifa->addr_lst);
+ spin_unlock_bh(&addrconf_hash_lock);
+ }
__ipv6_ifa_notify(RTM_DELADDR, ifa);
- atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
+ if (ifa->dead)
+ atomic_notifier_call_chain(&inet6addr_chain,
+ NETDEV_DOWN, ifa);
in6_ifa_put(ifa);
write_lock_bh(&idev->lock);
for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
struct hlist_node *n;
- hlist_for_each_entry_rcu(ifa, n, &inet6_addr_lst[state->bucket],
+ hlist_for_each_entry_rcu_bh(ifa, n, &inet6_addr_lst[state->bucket],
addr_lst)
if (net_eq(dev_net(ifa->idev->dev), net))
return ifa;
struct net *net = seq_file_net(seq);
struct hlist_node *n = &ifa->addr_lst;
- hlist_for_each_entry_continue_rcu(ifa, n, addr_lst)
+ hlist_for_each_entry_continue_rcu_bh(ifa, n, addr_lst)
if (net_eq(dev_net(ifa->idev->dev), net))
return ifa;
while (++state->bucket < IN6_ADDR_HSIZE) {
- hlist_for_each_entry(ifa, n,
+ hlist_for_each_entry_rcu_bh(ifa, n,
&inet6_addr_lst[state->bucket], addr_lst) {
if (net_eq(dev_net(ifa->idev->dev), net))
return ifa;
}
static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(rcu)
+ __acquires(rcu_bh)
{
rcu_read_lock_bh();
return if6_get_idx(seq, *pos);
}
static void if6_seq_stop(struct seq_file *seq, void *v)
- __releases(rcu)
+ __releases(rcu_bh)
{
rcu_read_unlock_bh();
}
unsigned int hash = ipv6_addr_hash(addr);
rcu_read_lock_bh();
- hlist_for_each_entry_rcu(ifp, n, &inet6_addr_lst[hash], addr_lst) {
+ hlist_for_each_entry_rcu_bh(ifp, n, &inet6_addr_lst[hash], addr_lst) {
if (!net_eq(dev_net(ifp->idev->dev), net))
continue;
if (ipv6_addr_equal(&ifp->addr, addr) &&
static void addrconf_verify(unsigned long foo)
{
+ unsigned long now, next, next_sec, next_sched;
struct inet6_ifaddr *ifp;
struct hlist_node *node;
- unsigned long now, next;
int i;
rcu_read_lock_bh();
spin_lock(&addrconf_verify_lock);
now = jiffies;
- next = now + ADDR_CHECK_FREQUENCY;
+ next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
del_timer(&addr_chk_timer);
for (i = 0; i < IN6_ADDR_HSIZE; i++) {
restart:
- hlist_for_each_entry_rcu(ifp, node,
+ hlist_for_each_entry_rcu_bh(ifp, node,
&inet6_addr_lst[i], addr_lst) {
unsigned long age;
-#ifdef CONFIG_IPV6_PRIVACY
- unsigned long regen_advance;
-#endif
if (ifp->flags & IFA_F_PERMANENT)
continue;
spin_lock(&ifp->lock);
- age = (now - ifp->tstamp) / HZ;
-
-#ifdef CONFIG_IPV6_PRIVACY
- regen_advance = ifp->idev->cnf.regen_max_retry *
- ifp->idev->cnf.dad_transmits *
- ifp->idev->nd_parms->retrans_time / HZ;
-#endif
+ /* We try to batch several events at once. */
+ age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
if (ifp->valid_lft != INFINITY_LIFE_TIME &&
age >= ifp->valid_lft) {
#ifdef CONFIG_IPV6_PRIVACY
} else if ((ifp->flags&IFA_F_TEMPORARY) &&
!(ifp->flags&IFA_F_TENTATIVE)) {
+ unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
+ ifp->idev->cnf.dad_transmits *
+ ifp->idev->nd_parms->retrans_time / HZ;
+
if (age >= ifp->prefered_lft - regen_advance) {
struct inet6_ifaddr *ifpub = ifp->ifpub;
if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
}
}
- addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
+ next_sec = round_jiffies_up(next);
+ next_sched = next;
+
+ /* If rounded timeout is accurate enough, accept it. */
+ if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
+ next_sched = next_sec;
+
+ /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
+ if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
+ next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
+
+ ADBG((KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
+ now, next, next_sec, next_sched));
+
+ addr_chk_timer.expires = next_sched;
add_timer(&addr_chk_timer);
spin_unlock(&addrconf_verify_lock);
rcu_read_unlock_bh();
hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
if (idx < s_idx)
goto cont;
- if (idx > s_idx)
+ if (h > s_h || idx > s_idx)
s_ip_idx = 0;
ip_idx = 0;
idev = __in6_dev_get(dev);
addrconf_leave_anycast(ifp);
addrconf_leave_solict(ifp->idev, &ifp->addr);
dst_hold(&ifp->rt->u.dst);
- if (ip6_del_rt(ifp->rt))
+
+ if (ifp->dead && ip6_del_rt(ifp->rt))
dst_free(&ifp->rt->u.dst);
break;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff