diff options
Diffstat (limited to 'net/batman-adv/originator.c')
| -rw-r--r-- | net/batman-adv/originator.c | 1036 |
1 files changed, 784 insertions, 252 deletions
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index 8c32cf1c2de..6a484514cd3 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2009-2012 B.A.T.M.A.N. contributors: +/* Copyright (C) 2009-2014 B.A.T.M.A.N. contributors: * * Marek Lindner, Simon Wunderlich * @@ -12,9 +12,7 @@ * General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "main.h" @@ -25,26 +23,106 @@ #include "routing.h" #include "gateway_client.h" #include "hard-interface.h" -#include "unicast.h" #include "soft-interface.h" #include "bridge_loop_avoidance.h" +#include "network-coding.h" +#include "fragmentation.h" +#include "multicast.h" -static void batadv_purge_orig(struct work_struct *work); +/* hash class keys */ +static struct lock_class_key batadv_orig_hash_lock_class_key; -static void batadv_start_purge_timer(struct batadv_priv *bat_priv) -{ - INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig); - queue_delayed_work(batadv_event_workqueue, - &bat_priv->orig_work, msecs_to_jiffies(1000)); -} +static void batadv_purge_orig(struct work_struct *work); /* returns 1 if they are the same originator */ -static int batadv_compare_orig(const struct hlist_node *node, const void *data2) +int batadv_compare_orig(const struct hlist_node *node, const void *data2) { const void *data1 = container_of(node, struct batadv_orig_node, hash_entry); - return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); + return batadv_compare_eth(data1, data2); +} + +/** + * batadv_orig_node_vlan_get - get an orig_node_vlan object + * @orig_node: the originator serving the VLAN + * @vid: the VLAN identifier + * + * Returns the vlan object identified by vid and belonging to orig_node or NULL + * if it does not exist. + */ +struct batadv_orig_node_vlan * +batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node, + unsigned short vid) +{ + struct batadv_orig_node_vlan *vlan = NULL, *tmp; + + rcu_read_lock(); + list_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) { + if (tmp->vid != vid) + continue; + + if (!atomic_inc_not_zero(&tmp->refcount)) + continue; + + vlan = tmp; + + break; + } + rcu_read_unlock(); + + return 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 + * + * Returns NULL in case of failure or the vlan object identified by vid and + * belonging to orig_node otherwise. The object is created and added to the list + * if it does not exist. + * + * The object is returned with refcounter increased by 1. + */ +struct batadv_orig_node_vlan * +batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node, + unsigned short vid) +{ + struct batadv_orig_node_vlan *vlan; + + spin_lock_bh(&orig_node->vlan_list_lock); + + /* first look if an object for this vid already exists */ + vlan = batadv_orig_node_vlan_get(orig_node, vid); + if (vlan) + goto out; + + vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC); + if (!vlan) + goto out; + + atomic_set(&vlan->refcount, 2); + vlan->vid = vid; + + list_add_rcu(&vlan->list, &orig_node->vlan_list); + +out: + spin_unlock_bh(&orig_node->vlan_list_lock); + + return vlan; +} + +/** + * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free + * the originator-vlan object + * @orig_vlan: the originator-vlan object to release + */ +void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan) +{ + if (atomic_dec_and_test(&orig_vlan->refcount)) + kfree_rcu(orig_vlan, rcu); } int batadv_originator_init(struct batadv_priv *bat_priv) @@ -57,27 +135,128 @@ int batadv_originator_init(struct batadv_priv *bat_priv) if (!bat_priv->orig_hash) goto err; - batadv_start_purge_timer(bat_priv); + batadv_hash_set_lock_class(bat_priv->orig_hash, + &batadv_orig_hash_lock_class_key); + + INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig); + queue_delayed_work(batadv_event_workqueue, + &bat_priv->orig_work, + msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); + return 0; err: return -ENOMEM; } +/** + * batadv_neigh_ifinfo_free_rcu - free the neigh_ifinfo object + * @rcu: rcu pointer of the neigh_ifinfo object + */ +static void batadv_neigh_ifinfo_free_rcu(struct rcu_head *rcu) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo; + + neigh_ifinfo = container_of(rcu, struct batadv_neigh_ifinfo, rcu); + + if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT) + batadv_hardif_free_ref_now(neigh_ifinfo->if_outgoing); + + kfree(neigh_ifinfo); +} + +/** + * batadv_neigh_ifinfo_free_now - decrement the refcounter and possibly free + * the neigh_ifinfo (without rcu callback) + * @neigh_ifinfo: the neigh_ifinfo object to release + */ +static void +batadv_neigh_ifinfo_free_ref_now(struct batadv_neigh_ifinfo *neigh_ifinfo) +{ + if (atomic_dec_and_test(&neigh_ifinfo->refcount)) + batadv_neigh_ifinfo_free_rcu(&neigh_ifinfo->rcu); +} + +/** + * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly free + * the neigh_ifinfo + * @neigh_ifinfo: the neigh_ifinfo object to release + */ +void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo) +{ + if (atomic_dec_and_test(&neigh_ifinfo->refcount)) + call_rcu(&neigh_ifinfo->rcu, batadv_neigh_ifinfo_free_rcu); +} + +/** + * batadv_neigh_node_free_rcu - free the neigh_node + * @rcu: rcu pointer of the neigh_node + */ +static void batadv_neigh_node_free_rcu(struct rcu_head *rcu) +{ + struct hlist_node *node_tmp; + struct batadv_neigh_node *neigh_node; + struct batadv_neigh_ifinfo *neigh_ifinfo; + + neigh_node = container_of(rcu, struct batadv_neigh_node, rcu); + + hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, + &neigh_node->ifinfo_list, list) { + batadv_neigh_ifinfo_free_ref_now(neigh_ifinfo); + } + batadv_hardif_free_ref_now(neigh_node->if_incoming); + + kfree(neigh_node); +} + +/** + * batadv_neigh_node_free_ref_now - decrement the neighbors refcounter + * and possibly free it (without rcu callback) + * @neigh_node: neigh neighbor to free + */ +static void +batadv_neigh_node_free_ref_now(struct batadv_neigh_node *neigh_node) +{ + if (atomic_dec_and_test(&neigh_node->refcount)) + batadv_neigh_node_free_rcu(&neigh_node->rcu); +} + +/** + * batadv_neigh_node_free_ref - decrement the neighbors refcounter + * and possibly free it + * @neigh_node: neigh neighbor to free + */ void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node) { if (atomic_dec_and_test(&neigh_node->refcount)) - kfree_rcu(neigh_node, rcu); + call_rcu(&neigh_node->rcu, batadv_neigh_node_free_rcu); } -/* increases the refcounter of a found router */ +/** + * batadv_orig_node_get_router - 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 + * + * Returns the neighbor which should be router for this orig_node/iface. + * + * The object is returned with refcounter increased by 1. + */ struct batadv_neigh_node * -batadv_orig_node_get_router(struct batadv_orig_node *orig_node) +batadv_orig_router_get(struct batadv_orig_node *orig_node, + const struct batadv_hard_iface *if_outgoing) { - struct batadv_neigh_node *router; + struct batadv_orig_ifinfo *orig_ifinfo; + struct batadv_neigh_node *router = NULL; rcu_read_lock(); - router = rcu_dereference(orig_node->router); + hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) { + if (orig_ifinfo->if_outgoing != if_outgoing) + continue; + + router = rcu_dereference(orig_ifinfo->router); + break; + } if (router && !atomic_inc_not_zero(&router->refcount)) router = NULL; @@ -86,11 +265,178 @@ batadv_orig_node_get_router(struct batadv_orig_node *orig_node) return router; } +/** + * 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 + * + * Returns the requested orig_ifinfo or NULL if not found. + * + * The object is returned with refcounter increased by 1. + */ +struct batadv_orig_ifinfo * +batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list, + list) { + if (tmp->if_outgoing != if_outgoing) + continue; + + if (!atomic_inc_not_zero(&tmp->refcount)) + continue; + + orig_ifinfo = tmp; + break; + } + rcu_read_unlock(); + + return orig_ifinfo; +} + +/** + * 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 + * + * Returns NULL in case of failure or the orig_ifinfo object for the if_outgoing + * interface otherwise. The object is created and added to the list + * if it does not exist. + * + * The object is returned with refcounter increased by 1. + */ +struct batadv_orig_ifinfo * +batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_orig_ifinfo *orig_ifinfo = NULL; + unsigned long reset_time; + + spin_lock_bh(&orig_node->neigh_list_lock); + + orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing); + if (orig_ifinfo) + goto out; + + orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC); + if (!orig_ifinfo) + goto out; + + if (if_outgoing != BATADV_IF_DEFAULT && + !atomic_inc_not_zero(&if_outgoing->refcount)) { + kfree(orig_ifinfo); + orig_ifinfo = NULL; + goto out; + } + + reset_time = jiffies - 1; + reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); + orig_ifinfo->batman_seqno_reset = reset_time; + orig_ifinfo->if_outgoing = if_outgoing; + INIT_HLIST_NODE(&orig_ifinfo->list); + atomic_set(&orig_ifinfo->refcount, 2); + hlist_add_head_rcu(&orig_ifinfo->list, + &orig_node->ifinfo_list); +out: + spin_unlock_bh(&orig_node->neigh_list_lock); + return orig_ifinfo; +} + +/** + * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node + * @neigh_node: the neigh node to be queried + * @if_outgoing: the interface for which the ifinfo should be acquired + * + * The object is returned with refcounter increased by 1. + * + * Returns the requested neigh_ifinfo or NULL if not found + */ +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo = NULL, + *tmp_neigh_ifinfo; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list, + list) { + if (tmp_neigh_ifinfo->if_outgoing != if_outgoing) + continue; + + if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount)) + continue; + + neigh_ifinfo = tmp_neigh_ifinfo; + break; + } + rcu_read_unlock(); + + return neigh_ifinfo; +} + +/** + * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object + * @neigh_node: the neigh node to be queried + * @if_outgoing: the interface for which the ifinfo should be acquired + * + * Returns NULL in case of failure or the neigh_ifinfo object for the + * if_outgoing interface otherwise. The object is created and added to the list + * if it does not exist. + * + * The object is returned with refcounter increased by 1. + */ +struct batadv_neigh_ifinfo * +batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo; + + spin_lock_bh(&neigh->ifinfo_lock); + + neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing); + if (neigh_ifinfo) + goto out; + + neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC); + if (!neigh_ifinfo) + goto out; + + if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) { + kfree(neigh_ifinfo); + neigh_ifinfo = NULL; + goto out; + } + + INIT_HLIST_NODE(&neigh_ifinfo->list); + atomic_set(&neigh_ifinfo->refcount, 2); + neigh_ifinfo->if_outgoing = if_outgoing; + + hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list); + +out: + spin_unlock_bh(&neigh->ifinfo_lock); + + return neigh_ifinfo; +} + +/** + * batadv_neigh_node_new - create and init a new neigh_node object + * @hard_iface: the interface where the neighbour is connected to + * @neigh_addr: the mac address of the neighbour interface + * @orig_node: originator object representing the neighbour + * + * Allocates a new neigh_node object and initialises all the generic fields. + * Returns the new object or NULL on failure. + */ struct batadv_neigh_node * batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, - const uint8_t *neigh_addr, uint32_t seqno) + const uint8_t *neigh_addr, + struct batadv_orig_node *orig_node) { - struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); struct batadv_neigh_node *neigh_node; neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC); @@ -98,67 +444,168 @@ batadv_neigh_node_new(struct batadv_hard_iface *hard_iface, goto out; INIT_HLIST_NODE(&neigh_node->list); + INIT_HLIST_HEAD(&neigh_node->ifinfo_list); + spin_lock_init(&neigh_node->ifinfo_lock); - memcpy(neigh_node->addr, neigh_addr, ETH_ALEN); - spin_lock_init(&neigh_node->lq_update_lock); + ether_addr_copy(neigh_node->addr, neigh_addr); + neigh_node->if_incoming = hard_iface; + neigh_node->orig_node = orig_node; /* extra reference for return */ atomic_set(&neigh_node->refcount, 2); - batadv_dbg(BATADV_DBG_BATMAN, bat_priv, - "Creating new neighbor %pM, initial seqno %d\n", - neigh_addr, seqno); - out: return neigh_node; } +/** + * 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 + * + * Looks for and possibly returns a neighbour belonging to this originator list + * which is connected through the provided hard interface. + * Returns NULL if the neighbour is not found. + */ +struct batadv_neigh_node * +batadv_neigh_node_get(const struct batadv_orig_node *orig_node, + const struct batadv_hard_iface *hard_iface, + const uint8_t *addr) +{ + struct batadv_neigh_node *tmp_neigh_node, *res = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) { + if (!batadv_compare_eth(tmp_neigh_node->addr, addr)) + continue; + + if (tmp_neigh_node->if_incoming != hard_iface) + continue; + + if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) + continue; + + res = tmp_neigh_node; + break; + } + rcu_read_unlock(); + + return res; +} + +/** + * batadv_orig_ifinfo_free_rcu - free the orig_ifinfo object + * @rcu: rcu pointer of the orig_ifinfo object + */ +static void batadv_orig_ifinfo_free_rcu(struct rcu_head *rcu) +{ + struct batadv_orig_ifinfo *orig_ifinfo; + struct batadv_neigh_node *router; + + orig_ifinfo = container_of(rcu, struct batadv_orig_ifinfo, rcu); + + if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT) + batadv_hardif_free_ref_now(orig_ifinfo->if_outgoing); + + /* this is the last reference to this object */ + router = rcu_dereference_protected(orig_ifinfo->router, true); + if (router) + batadv_neigh_node_free_ref_now(router); + kfree(orig_ifinfo); +} + +/** + * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free + * the orig_ifinfo (without rcu callback) + * @orig_ifinfo: the orig_ifinfo object to release + */ +static void +batadv_orig_ifinfo_free_ref_now(struct batadv_orig_ifinfo *orig_ifinfo) +{ + if (atomic_dec_and_test(&orig_ifinfo->refcount)) + batadv_orig_ifinfo_free_rcu(&orig_ifinfo->rcu); +} + +/** + * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free + * the orig_ifinfo + * @orig_ifinfo: the orig_ifinfo object to release + */ +void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo) +{ + if (atomic_dec_and_test(&orig_ifinfo->refcount)) + call_rcu(&orig_ifinfo->rcu, batadv_orig_ifinfo_free_rcu); +} + static void batadv_orig_node_free_rcu(struct rcu_head *rcu) { - struct hlist_node *node, *node_tmp; - struct batadv_neigh_node *neigh_node, *tmp_neigh_node; + struct hlist_node *node_tmp; + struct batadv_neigh_node *neigh_node; struct batadv_orig_node *orig_node; + struct batadv_orig_ifinfo *orig_ifinfo; orig_node = container_of(rcu, struct batadv_orig_node, rcu); spin_lock_bh(&orig_node->neigh_list_lock); - /* for all bonding members ... */ - list_for_each_entry_safe(neigh_node, tmp_neigh_node, - &orig_node->bond_list, bonding_list) { - list_del_rcu(&neigh_node->bonding_list); - batadv_neigh_node_free_ref(neigh_node); - } - /* for all neighbors towards this originator ... */ - hlist_for_each_entry_safe(neigh_node, node, node_tmp, + hlist_for_each_entry_safe(neigh_node, node_tmp, &orig_node->neigh_list, list) { hlist_del_rcu(&neigh_node->list); - batadv_neigh_node_free_ref(neigh_node); + batadv_neigh_node_free_ref_now(neigh_node); } + hlist_for_each_entry_safe(orig_ifinfo, node_tmp, + &orig_node->ifinfo_list, list) { + hlist_del_rcu(&orig_ifinfo->list); + batadv_orig_ifinfo_free_ref_now(orig_ifinfo); + } spin_unlock_bh(&orig_node->neigh_list_lock); - batadv_frag_list_free(&orig_node->frag_list); - batadv_tt_global_del_orig(orig_node->bat_priv, orig_node, + batadv_mcast_purge_orig(orig_node); + + /* Free nc_nodes */ + batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL); + + batadv_frag_purge_orig(orig_node, NULL); + + batadv_tt_global_del_orig(orig_node->bat_priv, orig_node, -1, "originator timed out"); + if (orig_node->bat_priv->bat_algo_ops->bat_orig_free) + orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node); + kfree(orig_node->tt_buff); - kfree(orig_node->bcast_own); - kfree(orig_node->bcast_own_sum); kfree(orig_node); } +/** + * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly + * schedule an rcu callback for freeing it + * @orig_node: the orig node to free + */ void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node) { if (atomic_dec_and_test(&orig_node->refcount)) call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu); } +/** + * batadv_orig_node_free_ref_now - decrement the orig node refcounter and + * possibly free it (without rcu callback) + * @orig_node: the orig node to free + */ +void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node) +{ + if (atomic_dec_and_test(&orig_node->refcount)) + batadv_orig_node_free_rcu(&orig_node->rcu); +} + void batadv_originator_free(struct batadv_priv *bat_priv) { struct batadv_hashtable *hash = bat_priv->orig_hash; - struct hlist_node *node, *node_tmp; + struct hlist_node *node_tmp; struct hlist_head *head; spinlock_t *list_lock; /* spinlock to protect write access */ struct batadv_orig_node *orig_node; @@ -176,10 +623,9 @@ void batadv_originator_free(struct batadv_priv *bat_priv) list_lock = &hash->list_locks[i]; spin_lock_bh(list_lock); - hlist_for_each_entry_safe(orig_node, node, node_tmp, + hlist_for_each_entry_safe(orig_node, node_tmp, head, hash_entry) { - - hlist_del_rcu(node); + hlist_del_rcu(&orig_node->hash_entry); batadv_orig_node_free_ref(orig_node); } spin_unlock_bh(list_lock); @@ -188,20 +634,22 @@ void batadv_originator_free(struct batadv_priv *bat_priv) batadv_hash_destroy(hash); } -/* this function finds or creates an originator entry for the given - * address if it does not exits +/** + * 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 + * + * Creates a new originator object and initialise all the generic fields. + * The new object is not added to the originator list. + * Returns the newly created object or NULL on failure. */ -struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv, +struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv, const uint8_t *addr) { struct batadv_orig_node *orig_node; - int size; - int hash_added; + struct batadv_orig_node_vlan *vlan; unsigned long reset_time; - - orig_node = batadv_orig_hash_find(bat_priv, addr); - if (orig_node) - return orig_node; + int i; batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "Creating new originator: %pM\n", addr); @@ -211,81 +659,169 @@ struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv, return NULL; INIT_HLIST_HEAD(&orig_node->neigh_list); - INIT_LIST_HEAD(&orig_node->bond_list); - spin_lock_init(&orig_node->ogm_cnt_lock); + INIT_LIST_HEAD(&orig_node->vlan_list); + INIT_HLIST_HEAD(&orig_node->ifinfo_list); spin_lock_init(&orig_node->bcast_seqno_lock); spin_lock_init(&orig_node->neigh_list_lock); spin_lock_init(&orig_node->tt_buff_lock); + spin_lock_init(&orig_node->tt_lock); + spin_lock_init(&orig_node->vlan_list_lock); + + batadv_nc_init_orig(orig_node); /* extra reference for return */ atomic_set(&orig_node->refcount, 2); - orig_node->tt_initialised = false; orig_node->bat_priv = bat_priv; - memcpy(orig_node->orig, addr, ETH_ALEN); + ether_addr_copy(orig_node->orig, addr); batadv_dat_init_orig_node_addr(orig_node); - orig_node->router = NULL; - orig_node->tt_crc = 0; atomic_set(&orig_node->last_ttvn, 0); orig_node->tt_buff = NULL; orig_node->tt_buff_len = 0; - atomic_set(&orig_node->tt_size, 0); reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); orig_node->bcast_seqno_reset = reset_time; - orig_node->batman_seqno_reset = reset_time; - - atomic_set(&orig_node->bond_candidates, 0); +#ifdef CONFIG_BATMAN_ADV_MCAST + orig_node->mcast_flags = BATADV_NO_FLAGS; +#endif - size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; - - orig_node->bcast_own = kzalloc(size, GFP_ATOMIC); - if (!orig_node->bcast_own) + /* create a vlan object for the "untagged" LAN */ + vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS); + if (!vlan) goto free_orig_node; + /* batadv_orig_node_vlan_new() increases the refcounter. + * Immediately release vlan since it is not needed anymore in this + * context + */ + batadv_orig_node_vlan_free_ref(vlan); - size = bat_priv->num_ifaces * sizeof(uint8_t); - orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC); - - INIT_LIST_HEAD(&orig_node->frag_list); - orig_node->last_frag_packet = 0; - - if (!orig_node->bcast_own_sum) - goto free_bcast_own; - - hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, - batadv_choose_orig, orig_node, - &orig_node->hash_entry); - if (hash_added != 0) - goto free_bcast_own_sum; + for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) { + INIT_HLIST_HEAD(&orig_node->fragments[i].head); + spin_lock_init(&orig_node->fragments[i].lock); + orig_node->fragments[i].size = 0; + } return orig_node; -free_bcast_own_sum: - kfree(orig_node->bcast_own_sum); -free_bcast_own: - kfree(orig_node->bcast_own); free_orig_node: kfree(orig_node); return NULL; } +/** + * 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 + */ +static void +batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv, + struct batadv_neigh_node *neigh) +{ + struct batadv_neigh_ifinfo *neigh_ifinfo; + struct batadv_hard_iface *if_outgoing; + struct hlist_node *node_tmp; + + spin_lock_bh(&neigh->ifinfo_lock); + + /* for all ifinfo objects for this neighinator */ + hlist_for_each_entry_safe(neigh_ifinfo, node_tmp, + &neigh->ifinfo_list, list) { + if_outgoing = neigh_ifinfo->if_outgoing; + + /* always keep the default interface */ + if (if_outgoing == BATADV_IF_DEFAULT) + continue; + + /* don't purge if the interface is not (going) down */ + if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && + (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && + (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) + continue; + + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "neighbor/ifinfo purge: neighbor %pM, iface: %s\n", + neigh->addr, if_outgoing->net_dev->name); + + hlist_del_rcu(&neigh_ifinfo->list); + batadv_neigh_ifinfo_free_ref(neigh_ifinfo); + } + + spin_unlock_bh(&neigh->ifinfo_lock); +} + +/** + * 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 + * + * Returns true if any ifinfo entry was purged, false otherwise. + */ +static bool +batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig_node) +{ + struct batadv_orig_ifinfo *orig_ifinfo; + struct batadv_hard_iface *if_outgoing; + struct hlist_node *node_tmp; + bool ifinfo_purged = false; + + spin_lock_bh(&orig_node->neigh_list_lock); + + /* for all ifinfo objects for this originator */ + hlist_for_each_entry_safe(orig_ifinfo, node_tmp, + &orig_node->ifinfo_list, list) { + if_outgoing = orig_ifinfo->if_outgoing; + + /* always keep the default interface */ + if (if_outgoing == BATADV_IF_DEFAULT) + continue; + + /* don't purge if the interface is not (going) down */ + if ((if_outgoing->if_status != BATADV_IF_INACTIVE) && + (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) && + (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)) + continue; + + batadv_dbg(BATADV_DBG_BATMAN, bat_priv, + "router/ifinfo purge: originator %pM, iface: %s\n", + orig_node->orig, if_outgoing->net_dev->name); + + ifinfo_purged = true; + + hlist_del_rcu(&orig_ifinfo->list); + batadv_orig_ifinfo_free_ref(orig_ifinfo); + if (orig_node->last_bonding_candidate == orig_ifinfo) { + orig_node->last_bonding_candidate = NULL; + batadv_orig_ifinfo_free_ref(orig_ifinfo); + } + } + + spin_unlock_bh(&orig_node->neigh_list_lock); + + return ifinfo_purged; +} + + +/** + * 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 + * + * Returns true if any neighbor was purged, false otherwise + */ static bool batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, - struct batadv_orig_node *orig_node, - struct batadv_neigh_node **best_neigh_node) + struct batadv_orig_node *orig_node) { - struct hlist_node *node, *node_tmp; + struct hlist_node *node_tmp; struct batadv_neigh_node *neigh_node; bool neigh_purged = false; unsigned long last_seen; struct batadv_hard_iface *if_incoming; - *best_neigh_node = NULL; - spin_lock_bh(&orig_node->neigh_list_lock); /* for all neighbors towards this originator ... */ - hlist_for_each_entry_safe(neigh_node, node, node_tmp, + hlist_for_each_entry_safe(neigh_node, node_tmp, &orig_node->neigh_list, list) { - last_seen = neigh_node->last_seen; if_incoming = neigh_node->if_incoming; @@ -293,7 +829,6 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, (if_incoming->if_status == BATADV_IF_INACTIVE) || (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) { - if ((if_incoming->if_status == BATADV_IF_INACTIVE) || (if_incoming->if_status == BATADV_IF_NOT_IN_USE) || (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) @@ -310,12 +845,12 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, neigh_purged = true; hlist_del_rcu(&neigh_node->list); - batadv_bonding_candidate_del(orig_node, neigh_node); batadv_neigh_node_free_ref(neigh_node); } else { - if ((!*best_neigh_node) || - (neigh_node->tq_avg > (*best_neigh_node)->tq_avg)) - *best_neigh_node = neigh_node; + /* only necessary if not the whole neighbor is to be + * deleted, but some interface has been removed. + */ + batadv_purge_neigh_ifinfo(bat_priv, neigh_node); } } @@ -323,10 +858,57 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv, return neigh_purged; } +/** + * 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 + * + * Returns the current best neighbor, with refcount increased. + */ +static struct batadv_neigh_node * +batadv_find_best_neighbor(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_node *best = NULL, *neigh; + struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; + + rcu_read_lock(); + hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) { + if (best && (bao->bat_neigh_cmp(neigh, if_outgoing, + best, if_outgoing) <= 0)) + continue; + + if (!atomic_inc_not_zero(&neigh->refcount)) + continue; + + if (best) + batadv_neigh_node_free_ref(best); + + best = neigh; + } + rcu_read_unlock(); + + return best; +} + +/** + * 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 + * + * This function checks if the orig_node or substructures of it have become + * obsolete, and purges this information if that's the case. + * + * Returns true if the orig_node is to be removed, false otherwise. + */ static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node) { struct batadv_neigh_node *best_neigh_node; + struct batadv_hard_iface *hard_iface; + bool changed_ifinfo, changed_neigh; if (batadv_has_timed_out(orig_node->last_seen, 2 * BATADV_PURGE_TIMEOUT)) { @@ -335,12 +917,39 @@ static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, orig_node->orig, jiffies_to_msecs(orig_node->last_seen)); return true; - } else { - if (batadv_purge_orig_neighbors(bat_priv, orig_node, - &best_neigh_node)) - batadv_update_route(bat_priv, orig_node, - best_neigh_node); } + changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node); + changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node); + + if (!changed_ifinfo && !changed_neigh) + return false; + + /* first for NULL ... */ + best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node, + BATADV_IF_DEFAULT); + batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT, + best_neigh_node); + if (best_neigh_node) + batadv_neigh_node_free_ref(best_neigh_node); + + /* ... then for all other interfaces. */ + rcu_read_lock(); + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { + if (hard_iface->if_status != BATADV_IF_ACTIVE) + continue; + + if (hard_iface->soft_iface != bat_priv->soft_iface) + continue; + + best_neigh_node = batadv_find_best_neighbor(bat_priv, + orig_node, + hard_iface); + batadv_update_route(bat_priv, orig_node, hard_iface, + best_neigh_node); + if (best_neigh_node) + batadv_neigh_node_free_ref(best_neigh_node); + } + rcu_read_unlock(); return false; } @@ -348,7 +957,7 @@ static bool batadv_purge_orig_node(struct batadv_priv *bat_priv, static void _batadv_purge_orig(struct batadv_priv *bat_priv) { struct batadv_hashtable *hash = bat_priv->orig_hash; - struct hlist_node *node, *node_tmp; + struct hlist_node *node_tmp; struct hlist_head *head; spinlock_t *list_lock; /* spinlock to protect write access */ struct batadv_orig_node *orig_node; @@ -363,20 +972,17 @@ static void _batadv_purge_orig(struct batadv_priv *bat_priv) list_lock = &hash->list_locks[i]; spin_lock_bh(list_lock); - hlist_for_each_entry_safe(orig_node, node, node_tmp, + hlist_for_each_entry_safe(orig_node, node_tmp, head, hash_entry) { if (batadv_purge_orig_node(bat_priv, orig_node)) { - if (orig_node->gw_flags) - batadv_gw_node_delete(bat_priv, - orig_node); - hlist_del_rcu(node); + batadv_gw_node_delete(bat_priv, orig_node); + hlist_del_rcu(&orig_node->hash_entry); batadv_orig_node_free_ref(orig_node); continue; } - if (batadv_has_timed_out(orig_node->last_frag_packet, - BATADV_FRAG_TIMEOUT)) - batadv_frag_list_free(&orig_node->frag_list); + batadv_frag_purge_orig(orig_node, + batadv_frag_check_entry); } spin_unlock_bh(list_lock); } @@ -393,7 +999,9 @@ static void batadv_purge_orig(struct work_struct *work) delayed_work = container_of(work, struct delayed_work, work); bat_priv = container_of(delayed_work, struct batadv_priv, orig_work); _batadv_purge_orig(bat_priv); - batadv_start_purge_timer(bat_priv); + queue_delayed_work(batadv_event_workqueue, + &bat_priv->orig_work, + msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD)); } void batadv_purge_orig_ref(struct batadv_priv *bat_priv) @@ -405,102 +1013,74 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset) { struct net_device *net_dev = (struct net_device *)seq->private; struct batadv_priv *bat_priv = netdev_priv(net_dev); - struct batadv_hashtable *hash = bat_priv->orig_hash; - struct hlist_node *node, *node_tmp; - struct hlist_head *head; struct batadv_hard_iface *primary_if; - struct batadv_orig_node *orig_node; - struct batadv_neigh_node *neigh_node, *neigh_node_tmp; - int batman_count = 0; - int last_seen_secs; - int last_seen_msecs; - unsigned long last_seen_jiffies; - uint32_t i; primary_if = batadv_seq_print_text_primary_if_get(seq); if (!primary_if) - goto out; + return 0; - seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n", + seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n", BATADV_SOURCE_VERSION, primary_if->net_dev->name, - primary_if->net_dev->dev_addr, net_dev->name); - seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n", - "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE, - "Nexthop", "outgoingIF", "Potential nexthops"); + primary_if->net_dev->dev_addr, net_dev->name, + bat_priv->bat_algo_ops->name); - for (i = 0; i < hash->size; i++) { - head = &hash->table[i]; + batadv_hardif_free_ref(primary_if); - rcu_read_lock(); - hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) { - neigh_node = batadv_orig_node_get_router(orig_node); - if (!neigh_node) - continue; - - if (neigh_node->tq_avg == 0) - goto next; - - last_seen_jiffies = jiffies - orig_node->last_seen; - last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); - last_seen_secs = last_seen_msecs / 1000; - last_seen_msecs = last_seen_msecs % 1000; - - seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", - orig_node->orig, last_seen_secs, - last_seen_msecs, neigh_node->tq_avg, - neigh_node->addr, - neigh_node->if_incoming->net_dev->name); - - hlist_for_each_entry_rcu(neigh_node_tmp, node_tmp, - &orig_node->neigh_list, list) { - seq_printf(seq, " %pM (%3i)", - neigh_node_tmp->addr, - neigh_node_tmp->tq_avg); - } - - seq_printf(seq, "\n"); - batman_count++; - -next: - batadv_neigh_node_free_ref(neigh_node); - } - rcu_read_unlock(); + if (!bat_priv->bat_algo_ops->bat_orig_print) { + seq_puts(seq, + "No printing function for this routing protocol\n"); + return 0; } - if (batman_count == 0) - seq_printf(seq, "No batman nodes in range ...\n"); + bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, + BATADV_IF_DEFAULT); -out: - if (primary_if) - batadv_hardif_free_ref(primary_if); return 0; } -static int batadv_orig_node_add_if(struct batadv_orig_node *orig_node, - int max_if_num) +/** + * batadv_orig_hardif_seq_print_text - writes originator infos for a specific + * outgoing interface + * @seq: debugfs table seq_file struct + * @offset: not used + * + * Returns 0 + */ +int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset) { - void *data_ptr; - size_t data_size, old_size; + struct net_device *net_dev = (struct net_device *)seq->private; + struct batadv_hard_iface *hard_iface; + struct batadv_priv *bat_priv; - data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS; - old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; - data_ptr = kmalloc(data_size, GFP_ATOMIC); - if (!data_ptr) - return -ENOMEM; + hard_iface = batadv_hardif_get_by_netdev(net_dev); - memcpy(data_ptr, orig_node->bcast_own, old_size); - kfree(orig_node->bcast_own); - orig_node->bcast_own = data_ptr; + if (!hard_iface || !hard_iface->soft_iface) { + seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n"); + goto out; + } - data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); - if (!data_ptr) - return -ENOMEM; + bat_priv = netdev_priv(hard_iface->soft_iface); + if (!bat_priv->bat_algo_ops->bat_orig_print) { + seq_puts(seq, + "No printing function for this routing protocol\n"); + goto out; + } - memcpy(data_ptr, orig_node->bcast_own_sum, - (max_if_num - 1) * sizeof(uint8_t)); - kfree(orig_node->bcast_own_sum); - orig_node->bcast_own_sum = data_ptr; + if (hard_iface->if_status != BATADV_IF_ACTIVE) { + seq_puts(seq, "Interface not active\n"); + goto out; + } + seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n", + BATADV_SOURCE_VERSION, hard_iface->net_dev->name, + hard_iface->net_dev->dev_addr, + hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name); + + bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface); + +out: + if (hard_iface) + batadv_hardif_free_ref(hard_iface); return 0; } @@ -508,8 +1088,8 @@ int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, int max_if_num) { struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); + struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; struct batadv_hashtable *hash = bat_priv->orig_hash; - struct hlist_node *node; struct hlist_head *head; struct batadv_orig_node *orig_node; uint32_t i; @@ -522,11 +1102,11 @@ int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface, head = &hash->table[i]; rcu_read_lock(); - hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) { - spin_lock_bh(&orig_node->ogm_cnt_lock); - ret = batadv_orig_node_add_if(orig_node, max_if_num); - spin_unlock_bh(&orig_node->ogm_cnt_lock); - + hlist_for_each_entry_rcu(orig_node, head, hash_entry) { + ret = 0; + if (bao->bat_orig_add_if) + ret = bao->bat_orig_add_if(orig_node, + max_if_num); if (ret == -ENOMEM) goto err; } @@ -540,63 +1120,15 @@ err: return -ENOMEM; } -static int batadv_orig_node_del_if(struct batadv_orig_node *orig_node, - int max_if_num, int del_if_num) -{ - void *data_ptr = NULL; - int chunk_size; - - /* last interface was removed */ - if (max_if_num == 0) - goto free_bcast_own; - - chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; - data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC); - if (!data_ptr) - return -ENOMEM; - - /* copy first part */ - memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size); - - /* copy second part */ - memcpy((char *)data_ptr + del_if_num * chunk_size, - orig_node->bcast_own + ((del_if_num + 1) * chunk_size), - (max_if_num - del_if_num) * chunk_size); - -free_bcast_own: - kfree(orig_node->bcast_own); - orig_node->bcast_own = data_ptr; - - if (max_if_num == 0) - goto free_own_sum; - - data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC); - if (!data_ptr) - return -ENOMEM; - - memcpy(data_ptr, orig_node->bcast_own_sum, - del_if_num * sizeof(uint8_t)); - - memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t), - orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)), - (max_if_num - del_if_num) * sizeof(uint8_t)); - -free_own_sum: - kfree(orig_node->bcast_own_sum); - orig_node->bcast_own_sum = data_ptr; - - return 0; -} - int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, int max_if_num) { struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); struct batadv_hashtable *hash = bat_priv->orig_hash; - struct hlist_node *node; struct hlist_head *head; struct batadv_hard_iface *hard_iface_tmp; struct batadv_orig_node *orig_node; + struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; uint32_t i; int ret; @@ -607,12 +1139,12 @@ int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface, head = &hash->table[i]; rcu_read_lock(); - hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) { - spin_lock_bh(&orig_node->ogm_cnt_lock); - ret = batadv_orig_node_del_if(orig_node, max_if_num, - hard_iface->if_num); - spin_unlock_bh(&orig_node->ogm_cnt_lock); - + hlist_for_each_entry_rcu(orig_node, head, hash_entry) { + ret = 0; + if (bao->bat_orig_del_if) + ret = bao->bat_orig_del_if(orig_node, + max_if_num, + hard_iface->if_num); if (ret == -ENOMEM) goto err; } |