diff options
| author | WANG Cong <xiyou.wangcong@gmail.com> | 2014-09-12 02:35:13 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-14 00:38:42 +0400 |
| commit | b5350916bfd49f737d73c4c512fbea1b3537c703 (patch) | |
| tree | 8339ca8d3aed723ed02fb511b808b7dfac66aca2 /net/ipv6/mcast.c | |
| parent | 83aa29eefdb152d65e65a90605593766b4f793ef (diff) | |
| download | linux-b5350916bfd49f737d73c4c512fbea1b3537c703.tar.xz | |
ipv6: drop ipv6_sk_mc_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.c | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 484a94215d88..27ca0b741ccc 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -73,9 +73,6 @@ static void *__mld2_query_bugs[] __attribute__((__unused__)) = { static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; -/* Big mc list lock for all the sockets */ -static DEFINE_SPINLOCK(ipv6_sk_mc_lock); - static void igmp6_join_group(struct ifmcaddr6 *ma); static void igmp6_leave_group(struct ifmcaddr6 *ma); static void igmp6_timer_handler(unsigned long data); @@ -201,10 +198,8 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) return err; } - spin_lock(&ipv6_sk_mc_lock); mc_lst->next = np->ipv6_mc_list; rcu_assign_pointer(np->ipv6_mc_list, mc_lst); - spin_unlock(&ipv6_sk_mc_lock); rcu_read_unlock(); rtnl_unlock(); @@ -226,17 +221,14 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) return -EINVAL; rtnl_lock(); - spin_lock(&ipv6_sk_mc_lock); for (lnk = &np->ipv6_mc_list; - (mc_lst = rcu_dereference_protected(*lnk, - lockdep_is_held(&ipv6_sk_mc_lock))) != NULL; + (mc_lst = rtnl_dereference(*lnk)) != NULL; lnk = &mc_lst->next) { if ((ifindex == 0 || mc_lst->ifindex == ifindex) && ipv6_addr_equal(&mc_lst->addr, addr)) { struct net_device *dev; *lnk = mc_lst->next; - spin_unlock(&ipv6_sk_mc_lock); rcu_read_lock(); dev = dev_get_by_index_rcu(net, mc_lst->ifindex); @@ -256,7 +248,6 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) return 0; } } - spin_unlock(&ipv6_sk_mc_lock); rtnl_unlock(); return -EADDRNOTAVAIL; @@ -303,13 +294,10 @@ void ipv6_sock_mc_close(struct sock *sk) return; rtnl_lock(); - spin_lock(&ipv6_sk_mc_lock); - while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list, - lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) { + while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) { struct net_device *dev; np->ipv6_mc_list = mc_lst->next; - spin_unlock(&ipv6_sk_mc_lock); rcu_read_lock(); dev = dev_get_by_index_rcu(net, mc_lst->ifindex); @@ -326,9 +314,7 @@ void ipv6_sock_mc_close(struct sock *sk) atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); kfree_rcu(mc_lst, rcu); - spin_lock(&ipv6_sk_mc_lock); } - spin_unlock(&ipv6_sk_mc_lock); rtnl_unlock(); } |