diff options
Diffstat (limited to 'net/batman-adv/originator.c')
| -rw-r--r-- | net/batman-adv/originator.c | 154 |
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) { |