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Staging: batman-adv: convert batman_if custom refcounting to kref functions

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Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Marek Lindner
2010-11-22 00:55:43 +01:00
committed by Greg Kroah-Hartman
parent bd27509f49
commit b4abfcd4c7
4 changed files with 26 additions and 32 deletions
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12
drivers/staging/batman-adv/bat_sysfs.c
View File

@@ -413,7 +413,7 @@ static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
length = sprintf(buff, "%s\n", batman_if->if_status == IF_NOT_IN_USE ?
"none" : batman_if->soft_iface->name);
hardif_put(batman_if);
kref_put(&batman_if->refcount, hardif_free_ref);
return length;
}
@@ -436,7 +436,7 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
if (strlen(buff) >= IFNAMSIZ) {
pr_err("Invalid parameter for 'mesh_iface' setting received: "
"interface name too long '%s'\n", buff);
hardif_put(batman_if);
kref_put(&batman_if->refcount, hardif_free_ref);
return -EINVAL;
}
@@ -447,7 +447,7 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
if ((batman_if->if_status == status_tmp) || ((batman_if->soft_iface) &&
(strncmp(batman_if->soft_iface->name, buff, IFNAMSIZ) == 0))) {
hardif_put(batman_if);
kref_put(&batman_if->refcount, hardif_free_ref);
return count;
}
@@ -455,7 +455,7 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
rtnl_lock();
hardif_disable_interface(batman_if);
rtnl_unlock();
hardif_put(batman_if);
kref_put(&batman_if->refcount, hardif_free_ref);
return count;
}
@@ -467,7 +467,7 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
}
ret = hardif_enable_interface(batman_if, buff);
hardif_put(batman_if);
kref_put(&batman_if->refcount, hardif_free_ref);
return ret;
}
@@ -502,7 +502,7 @@ static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
break;
}
hardif_put(batman_if);
kref_put(&batman_if->refcount, hardif_free_ref);
return length;
}

30
drivers/staging/batman-adv/hard-interface.c
View File

@@ -50,7 +50,7 @@ struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev)
out:
if (batman_if)
hardif_hold(batman_if);
kref_get(&batman_if->refcount);
rcu_read_unlock();
return batman_if;
@@ -100,7 +100,7 @@ static struct batman_if *get_active_batman_if(struct net_device *soft_iface)
out:
if (batman_if)
hardif_hold(batman_if);
kref_get(&batman_if->refcount);
rcu_read_unlock();
return batman_if;
@@ -125,13 +125,13 @@ static void set_primary_if(struct bat_priv *bat_priv,
struct batman_if *old_if;
if (batman_if)
hardif_hold(batman_if);
kref_get(&batman_if->refcount);
old_if = bat_priv->primary_if;
bat_priv->primary_if = batman_if;
if (old_if)
hardif_put(old_if);
kref_put(&old_if->refcount, hardif_free_ref);
if (!bat_priv->primary_if)
return;
@@ -315,7 +315,7 @@ int hardif_enable_interface(struct batman_if *batman_if, char *iface_name)
batman_if->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN);
batman_if->batman_adv_ptype.func = batman_skb_recv;
batman_if->batman_adv_ptype.dev = batman_if->net_dev;
hardif_hold(batman_if);
kref_get(&batman_if->refcount);
dev_add_pack(&batman_if->batman_adv_ptype);
atomic_set(&batman_if->seqno, 1);
@@ -374,7 +374,7 @@ void hardif_disable_interface(struct batman_if *batman_if)
bat_info(batman_if->soft_iface, "Removing interface: %s\n",
batman_if->net_dev->name);
dev_remove_pack(&batman_if->batman_adv_ptype);
hardif_put(batman_if);
kref_put(&batman_if->refcount, hardif_free_ref);
bat_priv->num_ifaces--;
orig_hash_del_if(batman_if, bat_priv->num_ifaces);
@@ -386,7 +386,7 @@ void hardif_disable_interface(struct batman_if *batman_if)
set_primary_if(bat_priv, new_if);
if (new_if)
hardif_put(new_if);
kref_put(&new_if->refcount, hardif_free_ref);
}
kfree(batman_if->packet_buff);
@@ -432,8 +432,7 @@ static struct batman_if *hardif_add_interface(struct net_device *net_dev)
batman_if->soft_iface = NULL;
batman_if->if_status = IF_NOT_IN_USE;
INIT_LIST_HEAD(&batman_if->list);
atomic_set(&batman_if->refcnt, 0);
hardif_hold(batman_if);
kref_init(&batman_if->refcount);
check_known_mac_addr(batman_if->net_dev);
@@ -442,7 +441,7 @@ static struct batman_if *hardif_add_interface(struct net_device *net_dev)
spin_unlock(&if_list_lock);
/* extra reference for return */
hardif_hold(batman_if);
kref_get(&batman_if->refcount);
return batman_if;
free_if:
@@ -465,7 +464,7 @@ static void hardif_remove_interface(struct batman_if *batman_if)
batman_if->if_status = IF_TO_BE_REMOVED;
synchronize_rcu();
sysfs_del_hardif(&batman_if->hardif_obj);
hardif_put(batman_if);
kref_put(&batman_if->refcount, hardif_free_ref);
}
void hardif_remove_interfaces(void)
@@ -522,10 +521,8 @@ static int hard_if_event(struct notifier_block *this,
update_min_mtu(batman_if->soft_iface);
break;
case NETDEV_CHANGEADDR:
if (batman_if->if_status == IF_NOT_IN_USE) {
hardif_put(batman_if);
goto out;
}
if (batman_if->if_status == IF_NOT_IN_USE)
goto hardif_put;
check_known_mac_addr(batman_if->net_dev);
update_mac_addresses(batman_if);
@@ -537,8 +534,9 @@ static int hard_if_event(struct notifier_block *this,
default:
break;
};
hardif_put(batman_if);
hardif_put:
kref_put(&batman_if->refcount, hardif_free_ref);
out:
return NOTIFY_DONE;
}

14
drivers/staging/batman-adv/hard-interface.h
View File

@@ -42,17 +42,13 @@ int batman_skb_recv(struct sk_buff *skb,
int hardif_min_mtu(struct net_device *soft_iface);
void update_min_mtu(struct net_device *soft_iface);
static inline void hardif_hold(struct batman_if *batman_if)
static inline void hardif_free_ref(struct kref *refcount)
{
atomic_inc(&batman_if->refcnt);
}
struct batman_if *batman_if;
static inline void hardif_put(struct batman_if *batman_if)
{
if (atomic_dec_and_test(&batman_if->refcnt)) {
dev_put(batman_if->net_dev);
kfree(batman_if);
}
batman_if = container_of(refcount, struct batman_if, refcount);
dev_put(batman_if->net_dev);
kfree(batman_if);
}
#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */

2
drivers/staging/batman-adv/types.h
View File

@@ -43,7 +43,7 @@ struct batman_if {
unsigned char *packet_buff;
int packet_len;
struct kobject *hardif_obj;
atomic_t refcnt;
struct kref refcount;
struct packet_type batman_adv_ptype;
struct net_device *soft_iface;
};