static void pppoe_flush_dev(struct net_device *dev)
{
int hash;
BUG_ON(dev == NULL);
read_lock_bh(&pppoe_hash_lock);
for (hash = 0; hash < PPPOE_HASH_SIZE; hash++) {
struct pppox_sock *po = item_hash_table[hash];
while (po != NULL) {
if (po->pppoe_dev == dev) {
struct sock *sk = sk_pppox(po);
sock_hold(sk);
po->pppoe_dev = NULL;
/* We hold a reference to SK, now drop the
* hash table lock so that we may attempt
* to lock the socket (which can sleep).
*/
read_unlock_bh(&pppoe_hash_lock);
lock_sock(sk);
if (sk->sk_state &
(PPPOX_CONNECTED | PPPOX_BOUND)) {
pppox_unbind_sock(sk);
dev_put(dev);
sk->sk_state = PPPOX_ZOMBIE;
sk->sk_state_change(sk);
}
release_sock(sk);
sock_put(sk);
read_lock_bh(&pppoe_hash_lock);
/* Now restart from the beginning of this
* hash chain. We always NULL out pppoe_dev
* so we are guaranteed to make forward
* progress.
*/
po = item_hash_table[hash];
continue;
}
po = po->next;
}
}
read_unlock_bh(&pppoe_hash_lock);
}
/**********************************************************************
*
* Set/get/delete/rehash items
*
**********************************************************************/
static inline struct pppox_sock *get_item(unsigned long sid,
unsigned char *addr)
{
struct pppox_sock *po;
read_lock_bh(&pppoe_hash_lock);
po = __get_item(sid, addr);
if (po)
sock_hold(sk_pppox(po));
read_unlock_bh(&pppoe_hash_lock);
return po;
}
static inline struct pppox_sock *dzc_get_item(struct pppoe_net *pn, __be16 sid,
unsigned char *addr, int ifindex)
{
struct pppox_sock *po;
read_lock_bh(&pn->hash_lock);
po = __get_item(pn, sid, addr, ifindex);
if (po)
sock_hold(sk_pppox(po));
read_unlock_bh(&pn->hash_lock);
return po;
}
static struct pppox_sock *lookup_chan(u16 call_id, __be32 s_addr)
{
struct pppox_sock *sock;
struct pptp_opt *opt;
rcu_read_lock();
sock = rcu_dereference(callid_sock[call_id]);
if (sock) {
opt = &sock->proto.pptp;
if (opt->dst_addr.sin_addr.s_addr != s_addr)
sock = NULL;
else
sock_hold(sk_pppox(sock));
}
rcu_read_unlock();
return sock;
}
static void pppoe_dzc_flush_dev(struct net_device *dev)
{
struct pppoe_net *pn;
int i;
pn = dzc_pppoe_pernet(dev_net(dev));
write_lock_bh(&pn->hash_lock);
for (i = 0; i < (1 << 4); i++) {
struct pppox_sock *po = pn->hash_table[i];
struct sock *sk;
while (po) {
while (po && po->pppoe_dev != dev) {
po = po->next;
}
if (!po)
break;
sk = sk_pppox(po);
sock_hold(sk);
write_unlock_bh(&pn->hash_lock);
lock_sock(sk);
if (po->pppoe_dev == dev &&
sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND | PPPOX_ZOMBIE)) {
pppox_unbind_sock(sk);
sk->sk_state = PPPOX_ZOMBIE;
sk->sk_state_change(sk);
po->pppoe_dev = NULL;
dev_put(dev);
}
release_sock(sk);
sock_put(sk);
BUG_ON(dzc_pppoe_pernet(dev_net(dev)) == NULL);
write_lock_bh(&pn->hash_lock);
po = pn->hash_table[i];
}
}
write_unlock_bh(&pn->hash_lock);
}
