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ip6mr: Optimize multiple unregistration

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Speedup module unloading by factorizing synchronize_rcu() calls

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2009-10-28 04:48:11 +00:00 committed by David S. Miller
parent 62808f9123
commit c871e664ea
1 changed files with 10 additions and 5 deletions
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15
net/ipv6/ip6mr.c
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@ -477,7 +477,7 @@ failure:
* Delete a VIF entry * Delete a VIF entry
*/ */
static int mif6_delete(struct net *net, int vifi) static int mif6_delete(struct net *net, int vifi, struct list_head *head)
{ {
struct mif_device *v; struct mif_device *v;
struct net_device *dev; struct net_device *dev;
@ -519,7 +519,7 @@ static int mif6_delete(struct net *net, int vifi)
in6_dev->cnf.mc_forwarding--; in6_dev->cnf.mc_forwarding--;
if (v->flags & MIFF_REGISTER) if (v->flags & MIFF_REGISTER)
unregister_netdevice(dev); unregister_netdevice_queue(dev, head);
dev_put(dev); dev_put(dev);
return 0; return 0;
@ -976,6 +976,7 @@ static int ip6mr_device_event(struct notifier_block *this,
struct net *net = dev_net(dev); struct net *net = dev_net(dev);
struct mif_device *v; struct mif_device *v;
int ct; int ct;
LIST_HEAD(list);
if (event != NETDEV_UNREGISTER) if (event != NETDEV_UNREGISTER)
return NOTIFY_DONE; return NOTIFY_DONE;
@ -983,8 +984,10 @@ static int ip6mr_device_event(struct notifier_block *this,
v = &net->ipv6.vif6_table[0]; v = &net->ipv6.vif6_table[0];
for (ct = 0; ct < net->ipv6.maxvif; ct++, v++) { for (ct = 0; ct < net->ipv6.maxvif; ct++, v++) {
if (v->dev == dev) if (v->dev == dev)
mif6_delete(net, ct); mif6_delete(net, ct, &list);
} }
unregister_netdevice_many(&list);
return NOTIFY_DONE; return NOTIFY_DONE;
} }
@ -1188,14 +1191,16 @@ static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock)
static void mroute_clean_tables(struct net *net) static void mroute_clean_tables(struct net *net)
{ {
int i; int i;
LIST_HEAD(list);
/* /*
* Shut down all active vif entries * Shut down all active vif entries
*/ */
for (i = 0; i < net->ipv6.maxvif; i++) { for (i = 0; i < net->ipv6.maxvif; i++) {
if (!(net->ipv6.vif6_table[i].flags & VIFF_STATIC)) if (!(net->ipv6.vif6_table[i].flags & VIFF_STATIC))
mif6_delete(net, i); mif6_delete(net, i, &list);
} }
unregister_netdevice_many(&list);
/* /*
* Wipe the cache * Wipe the cache
@ -1325,7 +1330,7 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns
if (copy_from_user(&mifi, optval, sizeof(mifi_t))) if (copy_from_user(&mifi, optval, sizeof(mifi_t)))
return -EFAULT; return -EFAULT;
rtnl_lock(); rtnl_lock();
ret = mif6_delete(net, mifi); ret = mif6_delete(net, mifi, NULL);
rtnl_unlock(); rtnl_unlock();
return ret; return ret;