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authorWANG Cong <xiyou.wangcong@gmail.com>2014-09-12 02:35:14 +0400
committerDavid S. Miller <davem@davemloft.net>2014-09-14 00:38:42 +0400
commit414b6c943fe25c5c576b6f0ce9077c29a150d826 (patch)
tree1d3fc15a88fa34cb42adad664e4cf4894e421f09 /net/ipv6/mcast.c
parentb5350916bfd49f737d73c4c512fbea1b3537c703 (diff)
downloadlinux-414b6c943fe25c5c576b6f0ce9077c29a150d826.tar.xz
ipv6: drop some rcu_read_lock in mcast
Similarly the code is already protected by rtnl lock. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/mcast.c')
-rw-r--r--net/ipv6/mcast.c17
1 files changed, 4 insertions, 13 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 27ca0b741ccc..4fb761d4002d 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -162,7 +162,6 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
mc_lst->addr = *addr;
rtnl_lock();
- rcu_read_lock();
if (ifindex == 0) {
struct rt6_info *rt;
rt = rt6_lookup(net, addr, NULL, 0, 0);
@@ -171,10 +170,9 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
ip6_rt_put(rt);
}
} else
- dev = dev_get_by_index_rcu(net, ifindex);
+ dev = __dev_get_by_index(net, ifindex);
if (dev == NULL) {
- rcu_read_unlock();
rtnl_unlock();
sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
return -ENODEV;
@@ -192,7 +190,6 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
err = ipv6_dev_mc_inc(dev, addr);
if (err) {
- rcu_read_unlock();
rtnl_unlock();
sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
return err;
@@ -201,7 +198,6 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
mc_lst->next = np->ipv6_mc_list;
rcu_assign_pointer(np->ipv6_mc_list, mc_lst);
- rcu_read_unlock();
rtnl_unlock();
return 0;
@@ -230,8 +226,7 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
*lnk = mc_lst->next;
- rcu_read_lock();
- dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
+ dev = __dev_get_by_index(net, mc_lst->ifindex);
if (dev != NULL) {
struct inet6_dev *idev = __in6_dev_get(dev);
@@ -240,7 +235,6 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
__ipv6_dev_mc_dec(idev, &mc_lst->addr);
} else
(void) ip6_mc_leave_src(sk, mc_lst, NULL);
- rcu_read_unlock();
rtnl_unlock();
atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
@@ -299,8 +293,7 @@ void ipv6_sock_mc_close(struct sock *sk)
np->ipv6_mc_list = mc_lst->next;
- rcu_read_lock();
- dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
+ dev = __dev_get_by_index(net, mc_lst->ifindex);
if (dev) {
struct inet6_dev *idev = __in6_dev_get(dev);
@@ -309,7 +302,6 @@ void ipv6_sock_mc_close(struct sock *sk)
__ipv6_dev_mc_dec(idev, &mc_lst->addr);
} else
(void) ip6_mc_leave_src(sk, mc_lst, NULL);
- rcu_read_unlock();
atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
kfree_rcu(mc_lst, rcu);
@@ -934,7 +926,7 @@ int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
struct inet6_dev *idev;
int err;
- rcu_read_lock();
+ ASSERT_RTNL();
idev = __in6_dev_get(dev);
if (!idev)
@@ -942,7 +934,6 @@ int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
else
err = __ipv6_dev_mc_dec(idev, addr);
- rcu_read_unlock();
return err;
}