@@ -513,7 +513,7 @@ static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet)
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
}
/**
@@ -615,7 +615,7 @@ batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet,
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return res;
}
@@ -642,10 +642,10 @@ static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff,
unsigned char *skb_buff;
unsigned int skb_size;
- if (!atomic_inc_not_zero(&if_incoming->refcount))
+ if (!kref_get_unless_zero(&if_incoming->refcount))
return;
- if (!atomic_inc_not_zero(&if_outgoing->refcount))
+ if (!kref_get_unless_zero(&if_outgoing->refcount))
goto out_free_incoming;
/* own packet should always be scheduled */
@@ -709,9 +709,9 @@ out_nomem:
if (!own_packet)
atomic_inc(&bat_priv->batman_queue_left);
out_free_outgoing:
- batadv_hardif_free_ref(if_outgoing);
+ batadv_hardif_put(if_outgoing);
out_free_incoming:
- batadv_hardif_free_ref(if_incoming);
+ batadv_hardif_put(if_incoming);
}
/* aggregate a new packet into the existing ogm packet */
@@ -956,7 +956,7 @@ static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface)
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
}
/**
@@ -423,7 +423,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac,
netif_rx(skb);
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
}
/**
@@ -1281,7 +1281,7 @@ void batadv_bla_status_update(struct net_device *net_dev)
* so just call that one.
*/
batadv_bla_update_orig_address(bat_priv, primary_if, primary_if);
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
}
/**
@@ -1355,7 +1355,7 @@ static void batadv_bla_periodic_work(struct work_struct *work)
}
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
queue_delayed_work(batadv_event_workqueue, &bat_priv->bla.work,
msecs_to_jiffies(BATADV_BLA_PERIOD_LENGTH));
@@ -1394,7 +1394,7 @@ int batadv_bla_init(struct batadv_priv *bat_priv)
if (primary_if) {
crc = crc16(0, primary_if->net_dev->dev_addr, ETH_ALEN);
bat_priv->bla.claim_dest.group = htons(crc);
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
} else {
bat_priv->bla.claim_dest.group = 0; /* will be set later */
}
@@ -1598,7 +1598,7 @@ void batadv_bla_free(struct batadv_priv *bat_priv)
bat_priv->bla.backbone_hash = NULL;
}
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
}
/**
@@ -1691,7 +1691,7 @@ handled:
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
if (claim)
batadv_claim_put(claim);
return ret;
@@ -1780,7 +1780,7 @@ handled:
ret = 1;
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
if (claim)
batadv_claim_put(claim);
return ret;
@@ -1838,7 +1838,7 @@ int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset)
}
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return 0;
}
@@ -1903,6 +1903,6 @@ int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset)
}
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return 0;
}
@@ -840,7 +840,7 @@ int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset)
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return 0;
}
@@ -512,7 +512,7 @@ bool batadv_frag_send_packet(struct sk_buff *skb,
out_err:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return ret;
}
@@ -661,7 +661,7 @@ int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset)
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return 0;
}
@@ -18,6 +18,7 @@
#include "hard-interface.h"
#include "main.h"
+#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/byteorder/generic.h>
#include <linux/errno.h>
@@ -26,6 +27,7 @@
#include <linux/if_ether.h>
#include <linux/if.h>
#include <linux/kernel.h>
+#include <linux/kref.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/printk.h>
@@ -47,13 +49,19 @@
#include "sysfs.h"
#include "translation-table.h"
-void batadv_hardif_free_rcu(struct rcu_head *rcu)
+/**
+ * batadv_hardif_release - release hard interface from lists and queue for
+ * free after rcu grace period
+ * @ref: kref pointer of the hard interface
+ */
+void batadv_hardif_release(struct kref *ref)
{
struct batadv_hard_iface *hard_iface;
- hard_iface = container_of(rcu, struct batadv_hard_iface, rcu);
+ hard_iface = container_of(ref, struct batadv_hard_iface, refcount);
dev_put(hard_iface->net_dev);
- kfree(hard_iface);
+
+ kfree_rcu(hard_iface, rcu);
}
struct batadv_hard_iface *
@@ -64,7 +72,7 @@ batadv_hardif_get_by_netdev(const struct net_device *net_dev)
rcu_read_lock();
list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
if (hard_iface->net_dev == net_dev &&
- atomic_inc_not_zero(&hard_iface->refcount))
+ kref_get_unless_zero(&hard_iface->refcount))
goto out;
}
@@ -169,7 +177,7 @@ batadv_hardif_get_active(const struct net_device *soft_iface)
continue;
if (hard_iface->if_status == BATADV_IF_ACTIVE &&
- atomic_inc_not_zero(&hard_iface->refcount))
+ kref_get_unless_zero(&hard_iface->refcount))
goto out;
}
@@ -193,7 +201,7 @@ static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv,
batadv_bla_update_orig_address(bat_priv, primary_if, oldif);
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
}
static void batadv_primary_if_select(struct batadv_priv *bat_priv,
@@ -203,7 +211,7 @@ static void batadv_primary_if_select(struct batadv_priv *bat_priv,
ASSERT_RTNL();
- if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount))
+ if (new_hard_iface && !kref_get_unless_zero(&new_hard_iface->refcount))
new_hard_iface = NULL;
curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1);
@@ -217,7 +225,7 @@ static void batadv_primary_if_select(struct batadv_priv *bat_priv,
out:
if (curr_hard_iface)
- batadv_hardif_free_ref(curr_hard_iface);
+ batadv_hardif_put(curr_hard_iface);
}
static bool
@@ -376,7 +384,7 @@ batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface)
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
}
static void
@@ -431,7 +439,7 @@ int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
goto out;
- if (!atomic_inc_not_zero(&hard_iface->refcount))
+ if (!kref_get_unless_zero(&hard_iface->refcount))
goto out;
soft_iface = dev_get_by_name(&init_net, iface_name);
@@ -529,7 +537,7 @@ err_dev:
hard_iface->soft_iface = NULL;
dev_put(soft_iface);
err:
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
return ret;
}
@@ -560,7 +568,7 @@ void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
batadv_primary_if_select(bat_priv, new_if);
if (new_if)
- batadv_hardif_free_ref(new_if);
+ batadv_hardif_put(new_if);
}
bat_priv->bat_algo_ops->bat_iface_disable(hard_iface);
@@ -583,11 +591,11 @@ void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
}
hard_iface->soft_iface = NULL;
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
}
/**
@@ -606,7 +614,7 @@ static void batadv_hardif_remove_interface_finish(struct work_struct *work)
batadv_debugfs_del_hardif(hard_iface);
batadv_sysfs_del_hardif(&hard_iface->hardif_obj);
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
}
static struct batadv_hard_iface *
@@ -652,7 +660,8 @@ batadv_hardif_add_interface(struct net_device *net_dev)
hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS;
/* extra reference for return */
- atomic_set(&hard_iface->refcount, 2);
+ kref_init(&hard_iface->refcount);
+ kref_get(&hard_iface->refcount);
batadv_check_known_mac_addr(hard_iface->net_dev);
list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list);
@@ -760,10 +769,10 @@ static int batadv_hard_if_event(struct notifier_block *this,
}
hardif_put:
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return NOTIFY_DONE;
}
@@ -20,8 +20,8 @@
#include "main.h"
-#include <linux/atomic.h>
#include <linux/compiler.h>
+#include <linux/kref.h>
#include <linux/notifier.h>
#include <linux/rcupdate.h>
#include <linux/stddef.h>
@@ -61,18 +61,15 @@ void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
void batadv_hardif_remove_interfaces(void);
int batadv_hardif_min_mtu(struct net_device *soft_iface);
void batadv_update_min_mtu(struct net_device *soft_iface);
-void batadv_hardif_free_rcu(struct rcu_head *rcu);
+void batadv_hardif_release(struct kref *ref);
/**
- * batadv_hardif_free_ref - decrement the hard interface refcounter and
- * possibly free it
+ * batadv_hardif_put - decrement the hard interface refcounter and possibly free
* @hard_iface: the hard interface to free
*/
-static inline void
-batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
+static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface)
{
- if (atomic_dec_and_test(&hard_iface->refcount))
- call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
+ kref_put(&hard_iface->refcount, batadv_hardif_release);
}
static inline struct batadv_hard_iface *
@@ -85,7 +82,7 @@ batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
if (!hard_iface)
goto out;
- if (!atomic_inc_not_zero(&hard_iface->refcount))
+ if (!kref_get_unless_zero(&hard_iface->refcount))
hard_iface = NULL;
out:
@@ -288,7 +288,7 @@ free_skb:
kfree_skb(skb);
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
if (neigh_node)
batadv_neigh_node_put(neigh_node);
if (orig_node)
@@ -287,7 +287,7 @@ batadv_seq_print_text_primary_if_get(struct seq_file *seq)
seq_printf(seq,
"BATMAN mesh %s disabled - primary interface not active\n",
net_dev->name);
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
primary_if = NULL;
out:
@@ -1950,7 +1950,7 @@ int batadv_nc_nodes_seq_print_text(struct seq_file *seq, void *offset)
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return 0;
}
@@ -181,7 +181,7 @@ static void batadv_neigh_ifinfo_release(struct kref *ref)
neigh_ifinfo = container_of(ref, struct batadv_neigh_ifinfo, refcount);
if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT)
- batadv_hardif_free_ref(neigh_ifinfo->if_outgoing);
+ batadv_hardif_put(neigh_ifinfo->if_outgoing);
kfree_rcu(neigh_ifinfo, rcu);
}
@@ -212,7 +212,7 @@ static void batadv_hardif_neigh_release(struct kref *ref)
hlist_del_init_rcu(&hardif_neigh->list);
spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
- batadv_hardif_free_ref(hardif_neigh->if_incoming);
+ batadv_hardif_put(hardif_neigh->if_incoming);
kfree_rcu(hardif_neigh, rcu);
}
@@ -258,7 +258,7 @@ static void batadv_neigh_node_release(struct kref *ref)
if (bao->bat_neigh_free)
bao->bat_neigh_free(neigh_node);
- batadv_hardif_free_ref(neigh_node->if_incoming);
+ batadv_hardif_put(neigh_node->if_incoming);
kfree_rcu(neigh_node, rcu);
}
@@ -366,7 +366,7 @@ batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
goto out;
if (if_outgoing != BATADV_IF_DEFAULT &&
- !atomic_inc_not_zero(&if_outgoing->refcount)) {
+ !kref_get_unless_zero(&if_outgoing->refcount)) {
kfree(orig_ifinfo);
orig_ifinfo = NULL;
goto out;
@@ -446,7 +446,7 @@ batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh,
if (!neigh_ifinfo)
goto out;
- if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) {
+ if (if_outgoing && !kref_get_unless_zero(&if_outgoing->refcount)) {
kfree(neigh_ifinfo);
neigh_ifinfo = NULL;
goto out;
@@ -523,12 +523,12 @@ batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface,
if (hardif_neigh)
goto out;
- if (!atomic_inc_not_zero(&hard_iface->refcount))
+ if (!kref_get_unless_zero(&hard_iface->refcount))
goto out;
hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC);
if (!hardif_neigh) {
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
goto out;
}
@@ -634,7 +634,7 @@ batadv_neigh_node_new(struct batadv_orig_node *orig_node,
if (!neigh_node)
goto out;
- if (!atomic_inc_not_zero(&hard_iface->refcount)) {
+ if (!kref_get_unless_zero(&hard_iface->refcount)) {
kfree(neigh_node);
neigh_node = NULL;
goto out;
@@ -691,7 +691,7 @@ int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset)
primary_if->net_dev->dev_addr, net_dev->name,
bat_priv->bat_algo_ops->name);
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
if (!bat_priv->bat_algo_ops->bat_neigh_print) {
seq_puts(seq,
@@ -716,7 +716,7 @@ static void batadv_orig_ifinfo_release(struct kref *ref)
orig_ifinfo = container_of(ref, struct batadv_orig_ifinfo, refcount);
if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT)
- batadv_hardif_free_ref(orig_ifinfo->if_outgoing);
+ batadv_hardif_put(orig_ifinfo->if_outgoing);
/* this is the last reference to this object */
router = rcu_dereference_protected(orig_ifinfo->router, true);
@@ -1216,7 +1216,7 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
primary_if->net_dev->dev_addr, net_dev->name,
bat_priv->bat_algo_ops->name);
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
if (!bat_priv->bat_algo_ops->bat_orig_print) {
seq_puts(seq,
@@ -1272,7 +1272,7 @@ int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset)
out:
if (hard_iface)
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
return 0;
}
@@ -269,7 +269,7 @@ static int batadv_recv_my_icmp_packet(struct batadv_priv *bat_priv,
}
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
if (orig_node)
batadv_orig_node_free_ref(orig_node);
return ret;
@@ -317,7 +317,7 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv,
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
if (orig_node)
batadv_orig_node_free_ref(orig_node);
return ret;
@@ -702,7 +702,7 @@ batadv_reroute_unicast_packet(struct batadv_priv *bat_priv,
ret = true;
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
if (orig_node)
batadv_orig_node_free_ref(orig_node);
@@ -808,7 +808,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
ether_addr_copy(unicast_packet->dest, primary_if->net_dev->dev_addr);
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
unicast_packet->ttvn = curr_ttvn;
@@ -246,7 +246,7 @@ bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv,
ret = true;
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return ret;
}
@@ -409,9 +409,9 @@ static void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet)
{
kfree_skb(forw_packet->skb);
if (forw_packet->if_incoming)
- batadv_hardif_free_ref(forw_packet->if_incoming);
+ batadv_hardif_put(forw_packet->if_incoming);
if (forw_packet->if_outgoing)
- batadv_hardif_free_ref(forw_packet->if_outgoing);
+ batadv_hardif_put(forw_packet->if_outgoing);
kfree(forw_packet);
}
@@ -497,7 +497,7 @@ out_and_inc:
atomic_inc(&bat_priv->bcast_queue_left);
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return NETDEV_TX_BUSY;
}
@@ -377,7 +377,7 @@ dropped_freed:
batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
end:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return NETDEV_TX_OK;
}
@@ -878,7 +878,7 @@ static int batadv_softif_slave_add(struct net_device *dev,
out:
if (hard_iface)
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
return ret;
}
@@ -905,7 +905,7 @@ static int batadv_softif_slave_del(struct net_device *dev,
out:
if (hard_iface)
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
return ret;
}
@@ -771,7 +771,7 @@ static ssize_t batadv_show_mesh_iface(struct kobject *kobj,
length = sprintf(buff, "%s\n", ifname);
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
return length;
}
@@ -795,7 +795,7 @@ static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
if (strlen(buff) >= IFNAMSIZ) {
pr_err("Invalid parameter for 'mesh_iface' setting received: interface name too long '%s'\n",
buff);
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
return -EINVAL;
}
@@ -829,7 +829,7 @@ static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
unlock:
rtnl_unlock();
out:
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
return ret;
}
@@ -863,7 +863,7 @@ static ssize_t batadv_show_iface_status(struct kobject *kobj,
break;
}
- batadv_hardif_free_ref(hard_iface);
+ batadv_hardif_put(hard_iface);
return length;
}
@@ -1023,7 +1023,7 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset)
}
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return 0;
}
@@ -1687,7 +1687,7 @@ int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset)
}
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
return 0;
}
@@ -2600,7 +2600,7 @@ static int batadv_send_tt_request(struct batadv_priv *bat_priv,
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
if (ret && tt_req_node) {
spin_lock_bh(&bat_priv->tt.req_list_lock);
/* hlist_del_init() verifies tt_req_node still is in the list */
@@ -2857,7 +2857,7 @@ out:
if (orig_node)
batadv_orig_node_free_ref(orig_node);
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
kfree(tvlv_tt_data);
/* The packet was for this host, so it doesn't need to be re-routed */
return true;
@@ -3180,7 +3180,7 @@ static void batadv_send_roam_adv(struct batadv_priv *bat_priv, u8 *client,
out:
if (primary_if)
- batadv_hardif_free_ref(primary_if);
+ batadv_hardif_put(primary_if);
}
static void batadv_tt_purge(struct work_struct *work)
@@ -111,7 +111,7 @@ struct batadv_hard_iface {
struct net_device *net_dev;
u8 num_bcasts;
struct kobject *hardif_obj;
- atomic_t refcount;
+ struct kref refcount;
struct packet_type batman_adv_ptype;
struct net_device *soft_iface;
struct rcu_head rcu;