struct phonet_routes routes;
};
-int phonet_net_id;
+int phonet_net_id __read_mostly;
struct phonet_device_list *phonet_device_list(struct net *net)
{
pnd->netdev = dev;
bitmap_zero(pnd->addrs, 64);
- list_add(&pnd->list, &pndevs->list);
+ BUG_ON(!mutex_is_locked(&pndevs->lock));
+ list_add_rcu(&pnd->list, &pndevs->list);
return pnd;
}
struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev));
struct phonet_device *pnd;
+ BUG_ON(!mutex_is_locked(&pndevs->lock));
list_for_each_entry(pnd, &pndevs->list, list) {
if (pnd->netdev == dev)
return pnd;
return NULL;
}
+static struct phonet_device *__phonet_get_rcu(struct net_device *dev)
+{
+ struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev));
+ struct phonet_device *pnd;
+
+ list_for_each_entry_rcu(pnd, &pndevs->list, list) {
+ if (pnd->netdev == dev)
+ return pnd;
+ }
+ return NULL;
+}
+
static void phonet_device_destroy(struct net_device *dev)
{
struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev));
ASSERT_RTNL();
- spin_lock_bh(&pndevs->lock);
+ mutex_lock(&pndevs->lock);
pnd = __phonet_get(dev);
if (pnd)
- list_del(&pnd->list);
- spin_unlock_bh(&pndevs->lock);
+ list_del_rcu(&pnd->list);
+ mutex_unlock(&pndevs->lock);
if (pnd) {
u8 addr;
struct phonet_device *pnd;
struct net_device *dev = NULL;
- spin_lock_bh(&pndevs->lock);
- list_for_each_entry(pnd, &pndevs->list, list) {
+ rcu_read_lock();
+ list_for_each_entry_rcu(pnd, &pndevs->list, list) {
dev = pnd->netdev;
BUG_ON(!dev);
}
if (dev)
dev_hold(dev);
- spin_unlock_bh(&pndevs->lock);
+ rcu_read_unlock();
return dev;
}
struct phonet_device *pnd;
int err = 0;
- spin_lock_bh(&pndevs->lock);
+ mutex_lock(&pndevs->lock);
/* Find or create Phonet-specific device data */
pnd = __phonet_get(dev);
if (pnd == NULL)
err = -ENOMEM;
else if (test_and_set_bit(addr >> 2, pnd->addrs))
err = -EEXIST;
- spin_unlock_bh(&pndevs->lock);
+ mutex_unlock(&pndevs->lock);
return err;
}
struct phonet_device *pnd;
int err = 0;
- spin_lock_bh(&pndevs->lock);
+ mutex_lock(&pndevs->lock);
pnd = __phonet_get(dev);
- if (!pnd || !test_and_clear_bit(addr >> 2, pnd->addrs))
+ if (!pnd || !test_and_clear_bit(addr >> 2, pnd->addrs)) {
err = -EADDRNOTAVAIL;
- else if (bitmap_empty(pnd->addrs, 64)) {
- list_del(&pnd->list);
+ pnd = NULL;
+ } else if (bitmap_empty(pnd->addrs, 64))
+ list_del_rcu(&pnd->list);
+ else
+ pnd = NULL;
+ mutex_unlock(&pndevs->lock);
+
+ if (pnd) {
+ synchronize_rcu();
kfree(pnd);
}
- spin_unlock_bh(&pndevs->lock);
return err;
}
/* Gets a source address toward a destination, through a interface. */
u8 phonet_address_get(struct net_device *dev, u8 daddr)
{
- struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev));
struct phonet_device *pnd;
u8 saddr;
- spin_lock_bh(&pndevs->lock);
- pnd = __phonet_get(dev);
+ rcu_read_lock();
+ pnd = __phonet_get_rcu(dev);
if (pnd) {
BUG_ON(bitmap_empty(pnd->addrs, 64));
saddr = find_first_bit(pnd->addrs, 64) << 2;
} else
saddr = PN_NO_ADDR;
- spin_unlock_bh(&pndevs->lock);
+ rcu_read_unlock();
if (saddr == PN_NO_ADDR) {
/* Fallback to another device */
struct phonet_device *pnd;
int err = -EADDRNOTAVAIL;
- spin_lock_bh(&pndevs->lock);
- list_for_each_entry(pnd, &pndevs->list, list) {
+ rcu_read_lock();
+ list_for_each_entry_rcu(pnd, &pndevs->list, list) {
/* Don't allow unregistering devices! */
if ((pnd->netdev->reg_state != NETREG_REGISTERED) ||
((pnd->netdev->flags & IFF_UP)) != IFF_UP)
}
}
found:
- spin_unlock_bh(&pndevs->lock);
+ rcu_read_unlock();
return err;
}
};
/* Per-namespace Phonet devices handling */
-static int phonet_init_net(struct net *net)
+static int __net_init phonet_init_net(struct net *net)
{
- struct phonet_net *pnn = kzalloc(sizeof(*pnn), GFP_KERNEL);
- if (!pnn)
- return -ENOMEM;
+ struct phonet_net *pnn = net_generic(net, phonet_net_id);
- if (!proc_net_fops_create(net, "phonet", 0, &pn_sock_seq_fops)) {
- kfree(pnn);
+ if (!proc_net_fops_create(net, "phonet", 0, &pn_sock_seq_fops))
return -ENOMEM;
- }
INIT_LIST_HEAD(&pnn->pndevs.list);
- spin_lock_init(&pnn->pndevs.lock);
+ mutex_init(&pnn->pndevs.lock);
mutex_init(&pnn->routes.lock);
- net_assign_generic(net, phonet_net_id, pnn);
return 0;
}
-static void phonet_exit_net(struct net *net)
+static void __net_exit phonet_exit_net(struct net *net)
{
struct phonet_net *pnn = net_generic(net, phonet_net_id);
struct net_device *dev;
rtnl_unlock();
proc_net_remove(net, "phonet");
- kfree(pnn);
}
static struct pernet_operations phonet_net_ops = {
.init = phonet_init_net,
.exit = phonet_exit_net,
+ .id = &phonet_net_id,
+ .size = sizeof(struct phonet_net),
};
/* Initialize Phonet devices list */
int __init phonet_device_init(void)
{
- int err = register_pernet_gen_device(&phonet_net_id, &phonet_net_ops);
+ int err = register_pernet_device(&phonet_net_ops);
if (err)
return err;
{
rtnl_unregister_all(PF_PHONET);
unregister_netdevice_notifier(&phonet_device_notifier);
- unregister_pernet_gen_device(phonet_net_id, &phonet_net_ops);
+ unregister_pernet_device(&phonet_net_ops);
}
int phonet_route_add(struct net_device *dev, u8 daddr)