diff options
Diffstat (limited to 'net/phonet/pn_dev.c')
| -rw-r--r-- | net/phonet/pn_dev.c | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c index 5c6ae0c701c..b18e48fae97 100644 --- a/net/phonet/pn_dev.c +++ b/net/phonet/pn_dev.c @@ -25,6 +25,7 @@ #include <linux/kernel.h> #include <linux/net.h> +#include <linux/slab.h> #include <linux/netdevice.h> #include <linux/phonet.h> #include <linux/proc_fs.h> @@ -45,9 +46,16 @@ struct phonet_net { int phonet_net_id __read_mostly; +static struct phonet_net *phonet_pernet(struct net *net) +{ + BUG_ON(!net); + + return net_generic(net, phonet_net_id); +} + struct phonet_device_list *phonet_device_list(struct net *net) { - struct phonet_net *pnn = net_generic(net, phonet_net_id); + struct phonet_net *pnn = phonet_pernet(net); return &pnn->pndevs; } @@ -154,6 +162,14 @@ int phonet_address_add(struct net_device *dev, u8 addr) return err; } +static void phonet_device_rcu_free(struct rcu_head *head) +{ + struct phonet_device *pnd; + + pnd = container_of(head, struct phonet_device, rcu); + kfree(pnd); +} + int phonet_address_del(struct net_device *dev, u8 addr) { struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev)); @@ -171,10 +187,9 @@ int phonet_address_del(struct net_device *dev, u8 addr) pnd = NULL; mutex_unlock(&pndevs->lock); - if (pnd) { - synchronize_rcu(); - kfree(pnd); - } + if (pnd) + call_rcu(&pnd->rcu, phonet_device_rcu_free); + return err; } @@ -260,7 +275,7 @@ static int phonet_device_autoconf(struct net_device *dev) static void phonet_route_autodel(struct net_device *dev) { - struct phonet_net *pnn = net_generic(dev_net(dev), phonet_net_id); + struct phonet_net *pnn = phonet_pernet(dev_net(dev)); unsigned i; DECLARE_BITMAP(deleted, 64); @@ -312,7 +327,7 @@ static struct notifier_block phonet_device_notifier = { /* Per-namespace Phonet devices handling */ static int __net_init phonet_init_net(struct net *net) { - struct phonet_net *pnn = net_generic(net, phonet_net_id); + struct phonet_net *pnn = phonet_pernet(net); if (!proc_net_fops_create(net, "phonet", 0, &pn_sock_seq_fops)) return -ENOMEM; @@ -325,7 +340,7 @@ static int __net_init phonet_init_net(struct net *net) static void __net_exit phonet_exit_net(struct net *net) { - struct phonet_net *pnn = net_generic(net, phonet_net_id); + struct phonet_net *pnn = phonet_pernet(net); struct net_device *dev; unsigned i; @@ -375,7 +390,7 @@ void phonet_device_exit(void) int phonet_route_add(struct net_device *dev, u8 daddr) { - struct phonet_net *pnn = net_generic(dev_net(dev), phonet_net_id); + struct phonet_net *pnn = phonet_pernet(dev_net(dev)); struct phonet_routes *routes = &pnn->routes; int err = -EEXIST; @@ -392,7 +407,7 @@ int phonet_route_add(struct net_device *dev, u8 daddr) int phonet_route_del(struct net_device *dev, u8 daddr) { - struct phonet_net *pnn = net_generic(dev_net(dev), phonet_net_id); + struct phonet_net *pnn = phonet_pernet(dev_net(dev)); struct phonet_routes *routes = &pnn->routes; daddr = daddr >> 2; @@ -412,7 +427,7 @@ int phonet_route_del(struct net_device *dev, u8 daddr) struct net_device *phonet_route_get(struct net *net, u8 daddr) { - struct phonet_net *pnn = net_generic(net, phonet_net_id); + struct phonet_net *pnn = phonet_pernet(net); struct phonet_routes *routes = &pnn->routes; struct net_device *dev; @@ -427,7 +442,7 @@ struct net_device *phonet_route_get(struct net *net, u8 daddr) struct net_device *phonet_route_output(struct net *net, u8 daddr) { - struct phonet_net *pnn = net_generic(net, phonet_net_id); + struct phonet_net *pnn = phonet_pernet(net); struct phonet_routes *routes = &pnn->routes; struct net_device *dev; |