aboutsummaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorEric Dumazet <eric.dumazet@gmail.com>2009-11-02 11:21:37 +0100
committerDavid S. Miller <davem@davemloft.net>2009-11-02 03:42:40 -0800
commitf1a28eab20076542322fcab3efa016834bd732f2 (patch)
treeda94305517418449975ceaeabe61ea6d1547cd67 /net
parent654d1f8a019dfa06df8355248e1ce222f303b88d (diff)
downloadlinux-2.6.34-ux500-f1a28eab20076542322fcab3efa016834bd732f2.tar.gz
ip6tnl: less dev_put() calls
Using dev_get_by_index_rcu() in ip6_tnl_rcv_ctl() & ip6_tnl_xmit_ctl() avoids touching device refcount. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/ip6_tunnel.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 6c1b5c98e81..1d614113a4b 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -658,6 +658,7 @@ static void ip6ip6_dscp_ecn_decapsulate(struct ip6_tnl *t,
IP6_ECN_set_ce(ipv6_hdr(skb));
}
+/* called with rcu_read_lock() */
static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t)
{
struct ip6_tnl_parm *p = &t->parms;
@@ -668,15 +669,13 @@ static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t)
struct net_device *ldev = NULL;
if (p->link)
- ldev = dev_get_by_index(net, p->link);
+ ldev = dev_get_by_index_rcu(net, p->link);
if ((ipv6_addr_is_multicast(&p->laddr) ||
likely(ipv6_chk_addr(net, &p->laddr, ldev, 0))) &&
likely(!ipv6_chk_addr(net, &p->raddr, NULL, 0)))
ret = 1;
- if (ldev)
- dev_put(ldev);
}
return ret;
}
@@ -804,8 +803,9 @@ static inline int ip6_tnl_xmit_ctl(struct ip6_tnl *t)
if (p->flags & IP6_TNL_F_CAP_XMIT) {
struct net_device *ldev = NULL;
+ rcu_read_lock();
if (p->link)
- ldev = dev_get_by_index(net, p->link);
+ ldev = dev_get_by_index_rcu(net, p->link);
if (unlikely(!ipv6_chk_addr(net, &p->laddr, ldev, 0)))
printk(KERN_WARNING
@@ -819,8 +819,7 @@ static inline int ip6_tnl_xmit_ctl(struct ip6_tnl *t)
p->name);
else
ret = 1;
- if (ldev)
- dev_put(ldev);
+ rcu_read_unlock();
}
return ret;
}