diff options
| author | WANG Cong <xiyou.wangcong@gmail.com> | 2014-09-11 15:35:14 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-13 16:38:42 -0400 |
| commit | 414b6c943fe25c5c576b6f0ce9077c29a150d826 (patch) | |
| tree | 1d3fc15a88fa34cb42adad664e4cf4894e421f09 | |
| parent | b5350916bfd49f737d73c4c512fbea1b3537c703 (diff) | |
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>
| -rw-r--r-- | net/ipv6/mcast.c | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 27ca0b741cc..4fb761d4002 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; } |