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Message-Id: <1382544303-2694-2-git-send-email-antonio@meshcoding.com>
Date: Wed, 23 Oct 2013 18:04:48 +0200
From: Antonio Quartulli <antonio@...hcoding.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
Antonio Quartulli <antonio@...n-mesh.com>,
Marek Lindner <lindner_marek@...oo.de>
Subject: [PATCH 01/16] batman-adv: make struct batadv_neigh_node algorithm agnostic
From: Antonio Quartulli <antonio@...n-mesh.com>
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@...n-mesh.com>
Signed-off-by: Marek Lindner <lindner_marek@...oo.de>
---
net/batman-adv/bat_iv_ogm.c | 60 +++++++++++++++++++++-----------------
net/batman-adv/gateway_client.c | 16 +++++-----
net/batman-adv/network-coding.c | 8 +++--
net/batman-adv/originator.c | 33 ++++++++++++++-------
net/batman-adv/originator.h | 3 +-
net/batman-adv/routing.c | 9 ++++--
net/batman-adv/translation-table.c | 4 +--
net/batman-adv/types.h | 41 ++++++++++++++++----------
8 files changed, 103 insertions(+), 71 deletions(-)
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 97b42d3..a2a0498 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -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;
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index 20fa053..2449afa 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -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:
diff --git a/net/batman-adv/network-coding.c b/net/batman-adv/network-coding.c
index 23f611b..351e199 100644
--- a/net/batman-adv/network-coding.c
+++ b/net/batman-adv/network-coding.c
@@ -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.
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index ee1d847..50f6d99 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -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");
diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h
index cc6d686..06e5a68 100644
--- a/net/batman-adv/originator.h
+++ b/net/batman-adv/originator.h
@@ -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);
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 4bcf221..5b78a71 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -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))
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 7731eae..1d5a4f5 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -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);
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index ff53933..a321334 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -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
+ * @lq_update_lock: lock protecting tq_recv & tq_index
+ */
+struct batadv_neigh_bat_iv {
+ uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
+ uint8_t tq_index;
+ uint8_t tq_avg;
+ DECLARE_BITMAP(real_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
+ uint8_t real_packet_count;
+ 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
- * @lq_update_lock: lock protecting tq_recv & tq_index
+ * @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];
- uint8_t tq_recv[BATADV_TQ_GLOBAL_WINDOW_SIZE];
- uint8_t tq_index;
- uint8_t tq_avg;
+ struct batadv_hard_iface *if_incoming;
+ unsigned long last_seen;
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 */
atomic_t refcount;
struct rcu_head rcu;
+ struct batadv_neigh_bat_iv bat_iv;
};
/**
--
1.8.4
--
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