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-rw-r--r--net/batman-adv/originator.c154
1 files changed, 115 insertions, 39 deletions
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 2967b86c13da..58a7d9274435 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2009-2017 B.A.T.M.A.N. contributors:
*
* Marek Lindner, Simon Wunderlich
@@ -21,7 +22,7 @@
#include <linux/atomic.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
-#include <linux/fs.h>
+#include <linux/gfp.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/kref.h>
@@ -30,10 +31,12 @@
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/rculist.h>
+#include <linux/rcupdate.h>
#include <linux/seq_file.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/stddef.h>
#include <linux/workqueue.h>
#include <net/sock.h>
#include <uapi/linux/batman_adv.h>
@@ -55,10 +58,47 @@
/* hash class keys */
static struct lock_class_key batadv_orig_hash_lock_class_key;
+/**
+ * batadv_orig_hash_find() - Find and return originator from orig_hash
+ * @bat_priv: the bat priv with all the soft interface information
+ * @data: mac address of the originator
+ *
+ * Return: orig_node (with increased refcnt), NULL on errors
+ */
+struct batadv_orig_node *
+batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data)
+{
+ struct batadv_hashtable *hash = bat_priv->orig_hash;
+ struct hlist_head *head;
+ struct batadv_orig_node *orig_node, *orig_node_tmp = NULL;
+ int index;
+
+ if (!hash)
+ return NULL;
+
+ index = batadv_choose_orig(data, hash->size);
+ head = &hash->table[index];
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
+ if (!batadv_compare_eth(orig_node, data))
+ continue;
+
+ if (!kref_get_unless_zero(&orig_node->refcount))
+ continue;
+
+ orig_node_tmp = orig_node;
+ break;
+ }
+ rcu_read_unlock();
+
+ return orig_node_tmp;
+}
+
static void batadv_purge_orig(struct work_struct *work);
/**
- * batadv_compare_orig - comparing function used in the originator hash table
+ * batadv_compare_orig() - comparing function used in the originator hash table
* @node: node in the local table
* @data2: second object to compare the node to
*
@@ -73,7 +113,7 @@ bool batadv_compare_orig(const struct hlist_node *node, const void *data2)
}
/**
- * batadv_orig_node_vlan_get - get an orig_node_vlan object
+ * batadv_orig_node_vlan_get() - get an orig_node_vlan object
* @orig_node: the originator serving the VLAN
* @vid: the VLAN identifier
*
@@ -104,7 +144,7 @@ batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node,
}
/**
- * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan
+ * batadv_orig_node_vlan_new() - search and possibly create an orig_node_vlan
* object
* @orig_node: the originator serving the VLAN
* @vid: the VLAN identifier
@@ -145,7 +185,7 @@ out:
}
/**
- * batadv_orig_node_vlan_release - release originator-vlan object from lists
+ * batadv_orig_node_vlan_release() - release originator-vlan object from lists
* and queue for free after rcu grace period
* @ref: kref pointer of the originator-vlan object
*/
@@ -159,7 +199,7 @@ static void batadv_orig_node_vlan_release(struct kref *ref)
}
/**
- * batadv_orig_node_vlan_put - decrement the refcounter and possibly release
+ * batadv_orig_node_vlan_put() - decrement the refcounter and possibly release
* the originator-vlan object
* @orig_vlan: the originator-vlan object to release
*/
@@ -168,6 +208,12 @@ void batadv_orig_node_vlan_put(struct batadv_orig_node_vlan *orig_vlan)
kref_put(&orig_vlan->refcount, batadv_orig_node_vlan_release);
}
+/**
+ * batadv_originator_init() - Initialize all originator structures
+ * @bat_priv: the bat priv with all the soft interface information
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
int batadv_originator_init(struct batadv_priv *bat_priv)
{
if (bat_priv->orig_hash)
@@ -193,7 +239,7 @@ err:
}
/**
- * batadv_neigh_ifinfo_release - release neigh_ifinfo from lists and queue for
+ * batadv_neigh_ifinfo_release() - release neigh_ifinfo from lists and queue for
* free after rcu grace period
* @ref: kref pointer of the neigh_ifinfo
*/
@@ -210,7 +256,7 @@ static void batadv_neigh_ifinfo_release(struct kref *ref)
}
/**
- * batadv_neigh_ifinfo_put - decrement the refcounter and possibly release
+ * batadv_neigh_ifinfo_put() - decrement the refcounter and possibly release
* the neigh_ifinfo
* @neigh_ifinfo: the neigh_ifinfo object to release
*/
@@ -220,7 +266,7 @@ void batadv_neigh_ifinfo_put(struct batadv_neigh_ifinfo *neigh_ifinfo)
}
/**
- * batadv_hardif_neigh_release - release hardif neigh node from lists and
+ * batadv_hardif_neigh_release() - release hardif neigh node from lists and
* queue for free after rcu grace period
* @ref: kref pointer of the neigh_node
*/
@@ -240,7 +286,7 @@ static void batadv_hardif_neigh_release(struct kref *ref)
}
/**
- * batadv_hardif_neigh_put - decrement the hardif neighbors refcounter
+ * batadv_hardif_neigh_put() - decrement the hardif neighbors refcounter
* and possibly release it
* @hardif_neigh: hardif neigh neighbor to free
*/
@@ -250,7 +296,7 @@ void batadv_hardif_neigh_put(struct batadv_hardif_neigh_node *hardif_neigh)
}
/**
- * batadv_neigh_node_release - release neigh_node from lists and queue for
+ * batadv_neigh_node_release() - release neigh_node from lists and queue for
* free after rcu grace period
* @ref: kref pointer of the neigh_node
*/
@@ -275,7 +321,7 @@ static void batadv_neigh_node_release(struct kref *ref)
}
/**
- * batadv_neigh_node_put - decrement the neighbors refcounter and possibly
+ * batadv_neigh_node_put() - decrement the neighbors refcounter and possibly
* release it
* @neigh_node: neigh neighbor to free
*/
@@ -285,7 +331,7 @@ void batadv_neigh_node_put(struct batadv_neigh_node *neigh_node)
}
/**
- * batadv_orig_router_get - router to the originator depending on iface
+ * batadv_orig_router_get() - router to the originator depending on iface
* @orig_node: the orig node for the router
* @if_outgoing: the interface where the payload packet has been received or
* the OGM should be sent to
@@ -318,7 +364,7 @@ batadv_orig_router_get(struct batadv_orig_node *orig_node,
}
/**
- * batadv_orig_ifinfo_get - find the ifinfo from an orig_node
+ * batadv_orig_ifinfo_get() - find the ifinfo from an orig_node
* @orig_node: the orig node to be queried
* @if_outgoing: the interface for which the ifinfo should be acquired
*
@@ -350,7 +396,7 @@ batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node,
}
/**
- * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object
+ * batadv_orig_ifinfo_new() - search and possibly create an orig_ifinfo object
* @orig_node: the orig node to be queried
* @if_outgoing: the interface for which the ifinfo should be acquired
*
@@ -396,7 +442,7 @@ out:
}
/**
- * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node
+ * batadv_neigh_ifinfo_get() - find the ifinfo from an neigh_node
* @neigh: the neigh node to be queried
* @if_outgoing: the interface for which the ifinfo should be acquired
*
@@ -429,7 +475,7 @@ batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh,
}
/**
- * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object
+ * batadv_neigh_ifinfo_new() - search and possibly create an neigh_ifinfo object
* @neigh: the neigh node to be queried
* @if_outgoing: the interface for which the ifinfo should be acquired
*
@@ -472,7 +518,7 @@ out:
}
/**
- * batadv_neigh_node_get - retrieve a neighbour from the list
+ * batadv_neigh_node_get() - retrieve a neighbour from the list
* @orig_node: originator which the neighbour belongs to
* @hard_iface: the interface where this neighbour is connected to
* @addr: the address of the neighbour
@@ -509,7 +555,7 @@ batadv_neigh_node_get(const struct batadv_orig_node *orig_node,
}
/**
- * batadv_hardif_neigh_create - create a hardif neighbour node
+ * batadv_hardif_neigh_create() - create a hardif neighbour node
* @hard_iface: the interface this neighbour is connected to
* @neigh_addr: the interface address of the neighbour to retrieve
* @orig_node: originator object representing the neighbour
@@ -555,7 +601,7 @@ out:
}
/**
- * batadv_hardif_neigh_get_or_create - retrieve or create a hardif neighbour
+ * batadv_hardif_neigh_get_or_create() - retrieve or create a hardif neighbour
* node
* @hard_iface: the interface this neighbour is connected to
* @neigh_addr: the interface address of the neighbour to retrieve
@@ -579,7 +625,7 @@ batadv_hardif_neigh_get_or_create(struct batadv_hard_iface *hard_iface,
}
/**
- * batadv_hardif_neigh_get - retrieve a hardif neighbour from the list
+ * batadv_hardif_neigh_get() - retrieve a hardif neighbour from the list
* @hard_iface: the interface where this neighbour is connected to
* @neigh_addr: the address of the neighbour
*
@@ -611,7 +657,7 @@ batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface,
}
/**
- * batadv_neigh_node_create - create a neigh node object
+ * batadv_neigh_node_create() - create a neigh node object
* @orig_node: originator object representing the neighbour
* @hard_iface: the interface where the neighbour is connected to
* @neigh_addr: the mac address of the neighbour interface
@@ -676,7 +722,7 @@ out:
}
/**
- * batadv_neigh_node_get_or_create - retrieve or create a neigh node object
+ * batadv_neigh_node_get_or_create() - retrieve or create a neigh node object
* @orig_node: originator object representing the neighbour
* @hard_iface: the interface where the neighbour is connected to
* @neigh_addr: the mac address of the neighbour interface
@@ -700,7 +746,7 @@ batadv_neigh_node_get_or_create(struct batadv_orig_node *orig_node,
#ifdef CONFIG_BATMAN_ADV_DEBUGFS
/**
- * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list
+ * batadv_hardif_neigh_seq_print_text() - print the single hop neighbour list
* @seq: neighbour table seq_file struct
* @offset: not used
*
@@ -735,8 +781,8 @@ int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset)
#endif
/**
- * batadv_hardif_neigh_dump - Dump to netlink the neighbor infos for a specific
- * outgoing interface
+ * batadv_hardif_neigh_dump() - Dump to netlink the neighbor infos for a
+ * specific outgoing interface
* @msg: message to dump into
* @cb: parameters for the dump
*
@@ -812,7 +858,7 @@ int batadv_hardif_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb)
}
/**
- * batadv_orig_ifinfo_release - release orig_ifinfo from lists and queue for
+ * batadv_orig_ifinfo_release() - release orig_ifinfo from lists and queue for
* free after rcu grace period
* @ref: kref pointer of the orig_ifinfo
*/
@@ -835,7 +881,7 @@ static void batadv_orig_ifinfo_release(struct kref *ref)
}
/**
- * batadv_orig_ifinfo_put - decrement the refcounter and possibly release
+ * batadv_orig_ifinfo_put() - decrement the refcounter and possibly release
* the orig_ifinfo
* @orig_ifinfo: the orig_ifinfo object to release
*/
@@ -845,7 +891,7 @@ void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo *orig_ifinfo)
}
/**
- * batadv_orig_node_free_rcu - free the orig_node
+ * batadv_orig_node_free_rcu() - free the orig_node
* @rcu: rcu pointer of the orig_node
*/
static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
@@ -866,7 +912,7 @@ static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
}
/**
- * batadv_orig_node_release - release orig_node from lists and queue for
+ * batadv_orig_node_release() - release orig_node from lists and queue for
* free after rcu grace period
* @ref: kref pointer of the orig_node
*/
@@ -917,7 +963,7 @@ static void batadv_orig_node_release(struct kref *ref)
}
/**
- * batadv_orig_node_put - decrement the orig node refcounter and possibly
+ * batadv_orig_node_put() - decrement the orig node refcounter and possibly
* release it
* @orig_node: the orig node to free
*/
@@ -926,6 +972,10 @@ void batadv_orig_node_put(struct batadv_orig_node *orig_node)
kref_put(&orig_node->refcount, batadv_orig_node_release);
}
+/**
+ * batadv_originator_free() - Free all originator structures
+ * @bat_priv: the bat priv with all the soft interface information
+ */
void batadv_originator_free(struct batadv_priv *bat_priv)
{
struct batadv_hashtable *hash = bat_priv->orig_hash;
@@ -959,7 +1009,7 @@ void batadv_originator_free(struct batadv_priv *bat_priv)
}
/**
- * batadv_orig_node_new - creates a new orig_node
+ * batadv_orig_node_new() - creates a new orig_node
* @bat_priv: the bat priv with all the soft interface information
* @addr: the mac address of the originator
*
@@ -1038,7 +1088,7 @@ free_orig_node:
}
/**
- * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor
+ * batadv_purge_neigh_ifinfo() - purge obsolete ifinfo entries from neighbor
* @bat_priv: the bat priv with all the soft interface information
* @neigh: orig node which is to be checked
*/
@@ -1079,7 +1129,7 @@ batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv,
}
/**
- * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator
+ * batadv_purge_orig_ifinfo() - purge obsolete ifinfo entries from originator
* @bat_priv: the bat priv with all the soft interface information
* @orig_node: orig node which is to be checked
*
@@ -1131,7 +1181,7 @@ batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv,
}
/**
- * batadv_purge_orig_neighbors - purges neighbors from originator
+ * batadv_purge_orig_neighbors() - purges neighbors from originator
* @bat_priv: the bat priv with all the soft interface information
* @orig_node: orig node which is to be checked
*
@@ -1189,7 +1239,7 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
}
/**
- * batadv_find_best_neighbor - finds the best neighbor after purging
+ * batadv_find_best_neighbor() - finds the best neighbor after purging
* @bat_priv: the bat priv with all the soft interface information
* @orig_node: orig node which is to be checked
* @if_outgoing: the interface for which the metric should be compared
@@ -1224,7 +1274,7 @@ batadv_find_best_neighbor(struct batadv_priv *bat_priv,
}
/**
- * batadv_purge_orig_node - purges obsolete information from an orig_node
+ * batadv_purge_orig_node() - purges obsolete information from an orig_node
* @bat_priv: the bat priv with all the soft interface information
* @orig_node: orig node which is to be checked
*
@@ -1341,12 +1391,24 @@ static void batadv_purge_orig(struct work_struct *work)
msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
}
+/**
+ * batadv_purge_orig_ref() - Purge all outdated originators
+ * @bat_priv: the bat priv with all the soft interface information
+ */
void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
{
_batadv_purge_orig(bat_priv);
}
#ifdef CONFIG_BATMAN_ADV_DEBUGFS
+
+/**
+ * batadv_orig_seq_print_text() - Print the originator table in a seq file
+ * @seq: seq file to print on
+ * @offset: not used
+ *
+ * Return: always 0
+ */
int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
{
struct net_device *net_dev = (struct net_device *)seq->private;
@@ -1376,7 +1438,7 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
}
/**
- * batadv_orig_hardif_seq_print_text - writes originator infos for a specific
+ * batadv_orig_hardif_seq_print_text() - writes originator infos for a specific
* outgoing interface
* @seq: debugfs table seq_file struct
* @offset: not used
@@ -1423,7 +1485,7 @@ out:
#endif
/**
- * batadv_orig_dump - Dump to netlink the originator infos for a specific
+ * batadv_orig_dump() - Dump to netlink the originator infos for a specific
* outgoing interface
* @msg: message to dump into
* @cb: parameters for the dump
@@ -1499,6 +1561,13 @@ int batadv_orig_dump(struct sk_buff *msg, struct netlink_callback *cb)
return ret;
}
+/**
+ * batadv_orig_hash_add_if() - Add interface to originators in orig_hash
+ * @hard_iface: hard interface to add (already slave of the soft interface)
+ * @max_if_num: new number of interfaces
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
int max_if_num)
{
@@ -1534,6 +1603,13 @@ err:
return -ENOMEM;
}
+/**
+ * batadv_orig_hash_del_if() - Remove interface from originators in orig_hash
+ * @hard_iface: hard interface to remove (still slave of the soft interface)
+ * @max_if_num: new number of interfaces
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
int max_if_num)
{