diff options
| -rw-r--r-- | net/ipv4/devinet.c | 33 | ||||
| -rw-r--r-- | net/ipv4/fib_frontend.c | 40 |
2 files changed, 33 insertions, 40 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 2fe50765a67..ee144a4fca4 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -125,6 +125,39 @@ static void inet_hash_remove(struct in_ifaddr *ifa) spin_unlock(&inet_addr_hash_lock); } +/** + * __ip_dev_find - find the first device with a given source address. + * @net: the net namespace + * @addr: the source address + * @devref: if true, take a reference on the found device + * + * If a caller uses devref=false, it should be protected by RCU, or RTNL + */ +struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref) +{ + unsigned int hash = inet_addr_hash(net, addr); + struct net_device *result = NULL; + struct in_ifaddr *ifa; + struct hlist_node *node; + + rcu_read_lock(); + hlist_for_each_entry_rcu(ifa, node, &inet_addr_lst[hash], hash) { + struct net_device *dev = ifa->ifa_dev->dev; + + if (!net_eq(dev_net(dev), net)) + continue; + if (ifa->ifa_address == addr) { + result = dev; + break; + } + } + if (result && devref) + dev_hold(result); + rcu_read_unlock(); + return result; +} +EXPORT_SYMBOL(__ip_dev_find); + static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32); static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 2a49c061b34..ad0778a3fa5 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -132,46 +132,6 @@ static void fib_flush(struct net *net) rt_cache_flush(net, -1); } -/** - * __ip_dev_find - find the first device with a given source address. - * @net: the net namespace - * @addr: the source address - * @devref: if true, take a reference on the found device - * - * If a caller uses devref=false, it should be protected by RCU, or RTNL - */ -struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref) -{ - struct flowi fl = { - .fl4_dst = addr, - }; - struct fib_result res = { 0 }; - struct net_device *dev = NULL; - struct fib_table *local_table; - -#ifdef CONFIG_IP_MULTIPLE_TABLES - res.r = NULL; -#endif - - rcu_read_lock(); - local_table = fib_get_table(net, RT_TABLE_LOCAL); - if (!local_table || - fib_table_lookup(local_table, &fl, &res, FIB_LOOKUP_NOREF)) { - rcu_read_unlock(); - return NULL; - } - if (res.type != RTN_LOCAL) - goto out; - dev = FIB_RES_DEV(res); - - if (dev && devref) - dev_hold(dev); -out: - rcu_read_unlock(); - return dev; -} -EXPORT_SYMBOL(__ip_dev_find); - /* * Find address type as if only "dev" was present in the system. If * on_dev is NULL then all interfaces are taken into consideration. |