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batman-adv: make struct batadv_neigh_node algorithm agnostic

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some of the fields in struct batadv_neigh_node are strictly
related to the B.A.T.M.A.N. IV algorithm. In order to
make the struct usable by any routing algorithm it has to be
split and made more generic

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
This commit is contained in:
Antonio Quartulli 2013-09-02 12:15:01 +02:00 committed by Antonio Quartulli
parent 47d4ab91e4
commit 0538f75991
8 changed files with 105 additions and 73 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
net/batman-adv/bat_iv_ogm.c
View File

@ -93,16 +93,18 @@ batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface,
struct batadv_orig_node *orig_node,
struct batadv_orig_node *orig_neigh)
{
struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
struct batadv_neigh_node *neigh_node;
neigh_node = batadv_neigh_node_new(hard_iface, neigh_addr);
neigh_node = batadv_neigh_node_new(hard_iface, neigh_addr, orig_node);
if (!neigh_node)
goto out;
INIT_LIST_HEAD(&neigh_node->bonding_list);
spin_lock_init(&neigh_node->bat_iv.lq_update_lock);
neigh_node->orig_node = orig_neigh;
neigh_node->if_incoming = hard_iface;
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Creating new neighbor %pM for orig_node %pM on interface %s\n",
neigh_addr, orig_node->orig, hard_iface->net_dev->name);
spin_lock_bh(&orig_node->neigh_list_lock);
hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list);
@ -755,12 +757,12 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv,
if (dup_status != BATADV_NO_DUP)
continue;
spin_lock_bh(&tmp_neigh_node->lq_update_lock);
batadv_ring_buffer_set(tmp_neigh_node->tq_recv,
&tmp_neigh_node->tq_index, 0);
tq_avg = batadv_ring_buffer_avg(tmp_neigh_node->tq_recv);
tmp_neigh_node->tq_avg = tq_avg;
spin_unlock_bh(&tmp_neigh_node->lq_update_lock);
spin_lock_bh(&tmp_neigh_node->bat_iv.lq_update_lock);
batadv_ring_buffer_set(tmp_neigh_node->bat_iv.tq_recv,
&tmp_neigh_node->bat_iv.tq_index, 0);
tq_avg = batadv_ring_buffer_avg(tmp_neigh_node->bat_iv.tq_recv);
tmp_neigh_node->bat_iv.tq_avg = tq_avg;
spin_unlock_bh(&tmp_neigh_node->bat_iv.lq_update_lock);
}
if (!neigh_node) {
@ -785,12 +787,13 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv,
neigh_node->last_seen = jiffies;
spin_lock_bh(&neigh_node->lq_update_lock);
batadv_ring_buffer_set(neigh_node->tq_recv,
&neigh_node->tq_index,
spin_lock_bh(&neigh_node->bat_iv.lq_update_lock);
batadv_ring_buffer_set(neigh_node->bat_iv.tq_recv,
&neigh_node->bat_iv.tq_index,
batadv_ogm_packet->tq);
neigh_node->tq_avg = batadv_ring_buffer_avg(neigh_node->tq_recv);
spin_unlock_bh(&neigh_node->lq_update_lock);
tq_avg = batadv_ring_buffer_avg(neigh_node->bat_iv.tq_recv);
neigh_node->bat_iv.tq_avg = tq_avg;
spin_unlock_bh(&neigh_node->bat_iv.lq_update_lock);
if (dup_status == BATADV_NO_DUP) {
orig_node->last_ttl = batadv_ogm_packet->header.ttl;
@ -807,13 +810,13 @@ batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv,
goto out;
/* if this neighbor does not offer a better TQ we won't consider it */
if (router && (router->tq_avg > neigh_node->tq_avg))
if (router && (router->bat_iv.tq_avg > neigh_node->bat_iv.tq_avg))
goto out;
/* if the TQ is the same and the link not more symmetric we
* won't consider it either
*/
if (router && (neigh_node->tq_avg == router->tq_avg)) {
if (router && (neigh_node->bat_iv.tq_avg == router->bat_iv.tq_avg)) {
orig_node_tmp = router->orig_node;
spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
if_num = router->if_incoming->if_num;
@ -892,7 +895,7 @@ static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node,
/* find packet count of corresponding one hop neighbor */
spin_lock_bh(&orig_node->ogm_cnt_lock);
orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num];
neigh_rq_count = neigh_node->real_packet_count;
neigh_rq_count = neigh_node->bat_iv.real_packet_count;
spin_unlock_bh(&orig_node->ogm_cnt_lock);
/* pay attention to not get a value bigger than 100 % */
@ -975,6 +978,7 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
uint32_t seqno = ntohl(batadv_ogm_packet->seqno);
uint8_t *neigh_addr;
uint8_t packet_count;
unsigned long *bitmap;
orig_node = batadv_get_orig_node(bat_priv, batadv_ogm_packet->orig);
if (!orig_node)
@ -995,7 +999,7 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
hlist_for_each_entry_rcu(tmp_neigh_node,
&orig_node->neigh_list, list) {
neigh_addr = tmp_neigh_node->addr;
is_dup = batadv_test_bit(tmp_neigh_node->real_bits,
is_dup = batadv_test_bit(tmp_neigh_node->bat_iv.real_bits,
orig_node->last_real_seqno,
seqno);
@ -1011,13 +1015,13 @@ batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
}
/* if the window moved, set the update flag. */
need_update |= batadv_bit_get_packet(bat_priv,
tmp_neigh_node->real_bits,
bitmap = tmp_neigh_node->bat_iv.real_bits;
need_update |= batadv_bit_get_packet(bat_priv, bitmap,
seq_diff, set_mark);
packet_count = bitmap_weight(tmp_neigh_node->real_bits,
packet_count = bitmap_weight(tmp_neigh_node->bat_iv.real_bits,
BATADV_TQ_LOCAL_WINDOW_SIZE);
tmp_neigh_node->real_packet_count = packet_count;
tmp_neigh_node->bat_iv.real_packet_count = packet_count;
}
rcu_read_unlock();
@ -1041,7 +1045,7 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr,
{
struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct batadv_hard_iface *hard_iface;
struct batadv_orig_node *orig_neigh_node, *orig_node;
struct batadv_orig_node *orig_neigh_node, *orig_node, *orig_node_tmp;
struct batadv_neigh_node *router = NULL, *router_router = NULL;
struct batadv_neigh_node *orig_neigh_router = NULL;
int has_directlink_flag;
@ -1192,10 +1196,12 @@ static void batadv_iv_ogm_process(const struct ethhdr *ethhdr,
}
router = batadv_orig_node_get_router(orig_node);
if (router)
router_router = batadv_orig_node_get_router(router->orig_node);
if (router) {
orig_node_tmp = router->orig_node;
router_router = batadv_orig_node_get_router(orig_node_tmp);
}
if ((router && router->tq_avg != 0) &&
if ((router && router->bat_iv.tq_avg != 0) &&
(batadv_compare_eth(router->addr, ethhdr->h_source)))
is_from_best_next_hop = true;

16
net/batman-adv/gateway_client.c
View File

@ -137,7 +137,7 @@ batadv_gw_get_best_gw_node(struct batadv_priv *bat_priv)
if (!atomic_inc_not_zero(&gw_node->refcount))
goto next;
tq_avg = router->tq_avg;
tq_avg = router->bat_iv.tq_avg;
switch (atomic_read(&bat_priv->gw_sel_class)) {
case 1: /* fast connection */
@ -256,7 +256,7 @@ void batadv_gw_election(struct batadv_priv *bat_priv)
next_gw->bandwidth_down / 10,
next_gw->bandwidth_down % 10,
next_gw->bandwidth_up / 10,
next_gw->bandwidth_up % 10, router->tq_avg);
next_gw->bandwidth_up % 10, router->bat_iv.tq_avg);
batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_ADD,
gw_addr);
} else {
@ -266,7 +266,7 @@ void batadv_gw_election(struct batadv_priv *bat_priv)
next_gw->bandwidth_down / 10,
next_gw->bandwidth_down % 10,
next_gw->bandwidth_up / 10,
next_gw->bandwidth_up % 10, router->tq_avg);
next_gw->bandwidth_up % 10, router->bat_iv.tq_avg);
batadv_throw_uevent(bat_priv, BATADV_UEV_GW, BATADV_UEV_CHANGE,
gw_addr);
}
@ -305,8 +305,8 @@ void batadv_gw_check_election(struct batadv_priv *bat_priv,
if (!router_orig)
goto out;
gw_tq_avg = router_gw->tq_avg;
orig_tq_avg = router_orig->tq_avg;
gw_tq_avg = router_gw->bat_iv.tq_avg;
orig_tq_avg = router_orig->bat_iv.tq_avg;
/* the TQ value has to be better */
if (orig_tq_avg < gw_tq_avg)
@ -528,7 +528,7 @@ static int batadv_write_buffer_text(struct batadv_priv *bat_priv,
ret = seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %u.%u/%u.%u MBit\n",
(curr_gw == gw_node ? "=>" : " "),
gw_node->orig_node->orig,
router->tq_avg, router->addr,
router->bat_iv.tq_avg, router->addr,
router->if_incoming->net_dev->name,
gw_node->bandwidth_down / 10,
gw_node->bandwidth_down % 10,
@ -792,7 +792,7 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv,
if (!neigh_curr)
goto out;
curr_tq_avg = neigh_curr->tq_avg;
curr_tq_avg = neigh_curr->bat_iv.tq_avg;
break;
case BATADV_GW_MODE_OFF:
default:
@ -803,7 +803,7 @@ bool batadv_gw_out_of_range(struct batadv_priv *bat_priv,
if (!neigh_old)
goto out;
if (curr_tq_avg - neigh_old->tq_avg > BATADV_GW_THRESHOLD)
if (curr_tq_avg - neigh_old->bat_iv.tq_avg > BATADV_GW_THRESHOLD)
out_of_range = true;
out:

8
net/batman-adv/network-coding.c
View File

@ -1003,7 +1003,7 @@ static bool batadv_nc_code_packets(struct batadv_priv *bat_priv,
struct batadv_nc_packet *nc_packet,
struct batadv_neigh_node *neigh_node)
{
uint8_t tq_weighted_neigh, tq_weighted_coding;
uint8_t tq_weighted_neigh, tq_weighted_coding, tq_tmp;
struct sk_buff *skb_dest, *skb_src;
struct batadv_unicast_packet *packet1;
struct batadv_unicast_packet *packet2;
@ -1028,8 +1028,10 @@ static bool batadv_nc_code_packets(struct batadv_priv *bat_priv,
if (!router_coding)
goto out;
tq_weighted_neigh = batadv_nc_random_weight_tq(router_neigh->tq_avg);
tq_weighted_coding = batadv_nc_random_weight_tq(router_coding->tq_avg);
tq_tmp = batadv_nc_random_weight_tq(router_neigh->bat_iv.tq_avg);
tq_weighted_neigh = tq_tmp;
tq_tmp = batadv_nc_random_weight_tq(router_coding->bat_iv.tq_avg);
tq_weighted_coding = tq_tmp;
/* Select one destination for the MAC-header dst-field based on
* weighted TQ-values.

33
net/batman-adv/originator.c
View File

@ -172,11 +172,20 @@ batadv_orig_node_get_router(struct batadv_orig_node *orig_node)
return router;
}
/**
* 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)
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);
@ -186,15 +195,14 @@ batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
INIT_HLIST_NODE(&neigh_node->list);
memcpy(neigh_node->addr, neigh_addr, ETH_ALEN);
spin_lock_init(&neigh_node->lq_update_lock);
neigh_node->if_incoming = hard_iface;
neigh_node->orig_node = orig_node;
INIT_LIST_HEAD(&neigh_node->bonding_list);
/* extra reference for return */
atomic_set(&neigh_node->refcount, 2);
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Creating new neighbor %pM on interface %s\n", neigh_addr,
hard_iface->net_dev->name);
out:
return neigh_node;
}
@ -401,6 +409,7 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
bool neigh_purged = false;
unsigned long last_seen;
struct batadv_hard_iface *if_incoming;
uint8_t best_metric = 0;
*best_neigh_node = NULL;
@ -436,8 +445,10 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
batadv_neigh_node_free_ref(neigh_node);
} else {
if ((!*best_neigh_node) ||
(neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
(neigh_node->bat_iv.tq_avg > best_metric)) {
*best_neigh_node = neigh_node;
best_metric = neigh_node->bat_iv.tq_avg;
}
}
}
@ -557,7 +568,7 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
if (!neigh_node)
continue;
if (neigh_node->tq_avg == 0)
if (neigh_node->bat_iv.tq_avg == 0)
goto next;
last_seen_jiffies = jiffies - orig_node->last_seen;
@ -567,7 +578,7 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:",
orig_node->orig, last_seen_secs,
last_seen_msecs, neigh_node->tq_avg,
last_seen_msecs, neigh_node->bat_iv.tq_avg,
neigh_node->addr,
neigh_node->if_incoming->net_dev->name);
@ -575,7 +586,7 @@ int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
&orig_node->neigh_list, list) {
seq_printf(seq, " %pM (%3i)",
neigh_node_tmp->addr,
neigh_node_tmp->tq_avg);
neigh_node_tmp->bat_iv.tq_avg);
}
seq_puts(seq, "\n");

3
net/batman-adv/originator.h
View File

@ -31,7 +31,8 @@ struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv,
const uint8_t *addr);
struct batadv_neigh_node *
batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
const uint8_t *neigh_addr);
const uint8_t *neigh_addr,
struct batadv_orig_node *orig_node);
void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node);
struct batadv_neigh_node *
batadv_orig_node_get_router(struct batadv_orig_node *orig_node);

9
net/batman-adv/routing.c
View File

@ -119,7 +119,7 @@ void batadv_bonding_candidate_add(struct batadv_orig_node *orig_node,
struct batadv_neigh_node *neigh_node)
{
struct batadv_neigh_node *tmp_neigh_node, *router = NULL;
uint8_t interference_candidate = 0;
uint8_t interference_candidate = 0, tq;
spin_lock_bh(&orig_node->neigh_list_lock);
@ -132,8 +132,10 @@ void batadv_bonding_candidate_add(struct batadv_orig_node *orig_node,
if (!router)
goto candidate_del;
/* ... and is good enough to be considered */
if (neigh_node->tq_avg < router->tq_avg - BATADV_BONDING_TQ_THRESHOLD)
tq = router->bat_iv.tq_avg - BATADV_BONDING_TQ_THRESHOLD;
if (neigh_node->bat_iv.tq_avg < tq)
goto candidate_del;
/* check if we have another candidate with the same mac address or
@ -502,7 +504,8 @@ batadv_find_ifalter_router(struct batadv_orig_node *primary_orig,
if (tmp_neigh_node->if_incoming == recv_if)
continue;
if (router && tmp_neigh_node->tq_avg <= router->tq_avg)
if (router &&
tmp_neigh_node->bat_iv.tq_avg <= router->bat_iv.tq_avg)
continue;
if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))

4
net/batman-adv/translation-table.c
View File

@ -1299,9 +1299,9 @@ batadv_transtable_best_orig(struct batadv_tt_global_entry *tt_global_entry)
if (!router)
continue;
if (router->tq_avg > best_tq) {
if (router->bat_iv.tq_avg > best_tq) {
best_entry = orig_entry;
best_tq = router->tq_avg;
best_tq = router->bat_iv.tq_avg;
}
batadv_neigh_node_free_ref(router);

45
net/batman-adv/types.h
View File

@ -263,40 +263,49 @@ struct batadv_gw_node {
};
/**
* struct batadv_neigh_node - structure for single hop neighbors
* @list: list node for batadv_orig_node::neigh_list
* @addr: mac address of neigh node
* struct batadv_neigh_bat_iv - B.A.T.M.A.N. IV specific structure for single
* hop neighbors
* @tq_recv: ring buffer of received TQ values from this neigh node
* @tq_index: ring buffer index
* @tq_avg: averaged tq of all tq values in the ring buffer (tq_recv)
* @last_ttl: last received ttl from this neigh node
* @bonding_list: list node for batadv_orig_node::bond_list
* @last_seen: when last packet via this neighbor was received
* @real_bits: bitfield containing the number of OGMs received from this neigh
* node (relative to orig_node->last_real_seqno)
* @real_packet_count: counted result of real_bits
* @orig_node: pointer to corresponding orig_node
* @if_incoming: pointer to incoming hard interface
* @lq_update_lock: lock protecting tq_recv & tq_index
* @refcount: number of contexts the object is used
* @rcu: struct used for freeing in an RCU-safe manner
*/
struct batadv_neigh_node {
struct hlist_node list;
uint8_t addr[ETH_ALEN];
struct batadv_neigh_bat_iv {
uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
uint8_t tq_index;
uint8_t tq_avg;
uint8_t last_ttl;
struct list_head bonding_list;
unsigned long last_seen;
DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
uint8_t real_packet_count;
struct batadv_orig_node *orig_node;
struct batadv_hard_iface *if_incoming;
spinlock_t lq_update_lock; /* protects tq_recv & tq_index */
};
/**
* struct batadv_neigh_node - structure for single hops neighbors
* @list: list node for batadv_orig_node::neigh_list
* @orig_node: pointer to corresponding orig_node
* @addr: the MAC address of the neighboring interface
* @if_incoming: pointer to incoming hard interface
* @last_seen: when last packet via this neighbor was received
* @last_ttl: last received ttl from this neigh node
* @bonding_list: list node for batadv_orig_node::bond_list
* @refcount: number of contexts the object is used
* @rcu: struct used for freeing in an RCU-safe manner
* @bat_iv: B.A.T.M.A.N. IV private structure
*/
struct batadv_neigh_node {
struct hlist_node list;
struct batadv_orig_node *orig_node;
uint8_t addr[ETH_ALEN];
struct batadv_hard_iface *if_incoming;
unsigned long last_seen;
uint8_t last_ttl;
struct list_head bonding_list;
atomic_t refcount;
struct rcu_head rcu;
struct batadv_neigh_bat_iv bat_iv;
};
/**