The following commit has been merged in the merge/master branch:
commit 894e104b3e39cf335655f6f3a5a6ac9a7b9f8bec
Merge: 4df87ed1e95d236d536d4358b71167c06756d9d9 88902d36eac702563002e0e1ea222916aaef881c
Author: Sven Eckelmann <sven(a)narfation.org>
Date: Sun Apr 17 20:18:09 2011 +0200
Merge remote-tracking branch 'origin/standalone/next' into merge/master
Conflicts:
net/batman-adv/CHANGELOG
net/batman-adv/Makefile
net/batman-adv/README
diff --combined net/batman-adv/gateway_client.c
index 3cc4355,2acd7a6..2acd7a6
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@@ -23,6 -23,7 +23,7 @@@
#include "gateway_client.h"
#include "gateway_common.h"
#include "hard-interface.h"
+ #include "originator.h"
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
@@@ -42,61 -43,76 +43,76 @@@ static void gw_node_free_ref(struct gw_
call_rcu(&gw_node->rcu, gw_node_free_rcu);
}
- void *gw_get_selected(struct bat_priv *bat_priv)
+ static struct gw_node *gw_get_selected_gw_node(struct bat_priv *bat_priv)
{
- struct gw_node *curr_gateway_tmp;
- struct orig_node *orig_node = NULL;
+ struct gw_node *gw_node;
rcu_read_lock();
- curr_gateway_tmp = rcu_dereference(bat_priv->curr_gw);
- if (!curr_gateway_tmp)
- goto out;
-
- orig_node = curr_gateway_tmp->orig_node;
- if (!orig_node)
+ gw_node = rcu_dereference(bat_priv->curr_gw);
+ if (!gw_node)
goto out;
- if (!atomic_inc_not_zero(&orig_node->refcount))
- orig_node = NULL;
+ if (!atomic_inc_not_zero(&gw_node->refcount))
+ gw_node = NULL;
out:
rcu_read_unlock();
- return orig_node;
+ return gw_node;
}
- void gw_deselect(struct bat_priv *bat_priv)
+ struct orig_node *gw_get_selected_orig(struct bat_priv *bat_priv)
{
struct gw_node *gw_node;
+ struct orig_node *orig_node = NULL;
- spin_lock_bh(&bat_priv->gw_list_lock);
- gw_node = rcu_dereference(bat_priv->curr_gw);
- rcu_assign_pointer(bat_priv->curr_gw, NULL);
- spin_unlock_bh(&bat_priv->gw_list_lock);
+ gw_node = gw_get_selected_gw_node(bat_priv);
+ if (!gw_node)
+ goto out;
+
+ rcu_read_lock();
+ orig_node = gw_node->orig_node;
+ if (!orig_node)
+ goto unlock;
+
+ if (!atomic_inc_not_zero(&orig_node->refcount))
+ orig_node = NULL;
+ unlock:
+ rcu_read_unlock();
+ out:
if (gw_node)
gw_node_free_ref(gw_node);
+ return orig_node;
}
static void gw_select(struct bat_priv *bat_priv, struct gw_node *new_gw_node)
{
struct gw_node *curr_gw_node;
+ spin_lock_bh(&bat_priv->gw_list_lock);
+
if (new_gw_node && !atomic_inc_not_zero(&new_gw_node->refcount))
new_gw_node = NULL;
- spin_lock_bh(&bat_priv->gw_list_lock);
- curr_gw_node = rcu_dereference(bat_priv->curr_gw);
+ curr_gw_node = bat_priv->curr_gw;
rcu_assign_pointer(bat_priv->curr_gw, new_gw_node);
if (curr_gw_node)
gw_node_free_ref(curr_gw_node);
+
+ spin_unlock_bh(&bat_priv->gw_list_lock);
+ }
+
+ void gw_deselect(struct bat_priv *bat_priv)
+ {
+ gw_select(bat_priv, NULL);
}
void gw_election(struct bat_priv *bat_priv)
{
struct hlist_node *node;
- struct gw_node *gw_node, *curr_gw, *curr_gw_tmp = NULL;
+ struct gw_node *gw_node, *curr_gw = NULL, *curr_gw_tmp = NULL;
+ struct neigh_node *router;
uint8_t max_tq = 0;
uint32_t max_gw_factor = 0, tmp_gw_factor = 0;
int down, up;
@@@ -110,32 -126,25 +126,25 @@@
if (atomic_read(&bat_priv->gw_mode) != GW_MODE_CLIENT)
return;
- rcu_read_lock();
- curr_gw = rcu_dereference(bat_priv->curr_gw);
- if (curr_gw) {
- rcu_read_unlock();
- return;
- }
+ curr_gw = gw_get_selected_gw_node(bat_priv);
+ if (!curr_gw)
+ goto out;
+ rcu_read_lock();
if (hlist_empty(&bat_priv->gw_list)) {
-
- if (curr_gw) {
- rcu_read_unlock();
- bat_dbg(DBG_BATMAN, bat_priv,
- "Removing selected gateway - "
- "no gateway in range\n");
- gw_deselect(bat_priv);
- } else
- rcu_read_unlock();
-
- return;
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Removing selected gateway - "
+ "no gateway in range\n");
+ gw_deselect(bat_priv);
+ goto unlock;
}
hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
- if (!gw_node->orig_node->router)
+ if (gw_node->deleted)
continue;
- if (gw_node->deleted)
+ router = orig_node_get_router(gw_node->orig_node);
+ if (!router)
continue;
switch (atomic_read(&bat_priv->gw_sel_class)) {
@@@ -143,15 -152,14 +152,14 @@@
gw_bandwidth_to_kbit(gw_node->orig_node->gw_flags,
&down, &up);
- tmp_gw_factor = (gw_node->orig_node->router->tq_avg *
- gw_node->orig_node->router->tq_avg *
+ tmp_gw_factor = (router->tq_avg * router->tq_avg *
down * 100 * 100) /
(TQ_LOCAL_WINDOW_SIZE *
TQ_LOCAL_WINDOW_SIZE * 64);
if ((tmp_gw_factor > max_gw_factor) ||
((tmp_gw_factor == max_gw_factor) &&
- (gw_node->orig_node->router->tq_avg > max_tq)))
+ (router->tq_avg > max_tq)))
curr_gw_tmp = gw_node;
break;
@@@ -163,19 -171,25 +171,25 @@@
* soon as a better gateway appears which has
* $routing_class more tq points)
**/
- if (gw_node->orig_node->router->tq_avg > max_tq)
+ if (router->tq_avg > max_tq)
curr_gw_tmp = gw_node;
break;
}
- if (gw_node->orig_node->router->tq_avg > max_tq)
- max_tq = gw_node->orig_node->router->tq_avg;
+ if (router->tq_avg > max_tq)
+ max_tq = router->tq_avg;
if (tmp_gw_factor > max_gw_factor)
max_gw_factor = tmp_gw_factor;
+
+ neigh_node_free_ref(router);
}
if (curr_gw != curr_gw_tmp) {
+ router = orig_node_get_router(curr_gw_tmp->orig_node);
+ if (!router)
+ goto unlock;
+
if ((curr_gw) && (!curr_gw_tmp))
bat_dbg(DBG_BATMAN, bat_priv,
"Removing selected gateway - "
@@@ -186,48 -200,50 +200,50 @@@
"(gw_flags: %i, tq: %i)\n",
curr_gw_tmp->orig_node->orig,
curr_gw_tmp->orig_node->gw_flags,
- curr_gw_tmp->orig_node->router->tq_avg);
+ router->tq_avg);
else
bat_dbg(DBG_BATMAN, bat_priv,
"Changing route to gateway %pM "
"(gw_flags: %i, tq: %i)\n",
curr_gw_tmp->orig_node->orig,
curr_gw_tmp->orig_node->gw_flags,
- curr_gw_tmp->orig_node->router->tq_avg);
+ router->tq_avg);
+ neigh_node_free_ref(router);
gw_select(bat_priv, curr_gw_tmp);
}
+ unlock:
rcu_read_unlock();
+ out:
+ if (curr_gw)
+ gw_node_free_ref(curr_gw);
}
void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node)
{
- struct gw_node *curr_gateway_tmp;
+ struct orig_node *curr_gw_orig;
+ struct neigh_node *router_gw = NULL, *router_orig = NULL;
uint8_t gw_tq_avg, orig_tq_avg;
- rcu_read_lock();
- curr_gateway_tmp = rcu_dereference(bat_priv->curr_gw);
- if (!curr_gateway_tmp)
- goto out_rcu;
+ curr_gw_orig = gw_get_selected_orig(bat_priv);
+ if (!curr_gw_orig)
+ goto deselect;
- if (!curr_gateway_tmp->orig_node)
- goto deselect_rcu;
-
- if (!curr_gateway_tmp->orig_node->router)
- goto deselect_rcu;
+ router_gw = orig_node_get_router(curr_gw_orig);
+ if (!router_gw)
+ goto deselect;
/* this node already is the gateway */
- if (curr_gateway_tmp->orig_node == orig_node)
- goto out_rcu;
-
- if (!orig_node->router)
- goto out_rcu;
+ if (curr_gw_orig == orig_node)
+ goto out;
- gw_tq_avg = curr_gateway_tmp->orig_node->router->tq_avg;
- rcu_read_unlock();
+ router_orig = orig_node_get_router(orig_node);
+ if (!router_orig)
+ goto out;
- orig_tq_avg = orig_node->router->tq_avg;
+ gw_tq_avg = router_gw->tq_avg;
+ orig_tq_avg = router_orig->tq_avg;
/* the TQ value has to be better */
if (orig_tq_avg < gw_tq_avg)
@@@ -245,16 -261,17 +261,17 @@@
"Restarting gateway selection: better gateway found (tq curr: "
"%i, tq new: %i)\n",
gw_tq_avg, orig_tq_avg);
- goto deselect;
deselect:
gw_deselect(bat_priv);
out:
+ if (curr_gw_orig)
+ orig_node_free_ref(curr_gw_orig);
+ if (router_gw)
+ neigh_node_free_ref(router_gw);
+ if (router_orig)
+ neigh_node_free_ref(router_orig);
+
return;
}
@@@ -291,7 -308,11 +308,11 @@@ void gw_node_update(struct bat_priv *ba
struct orig_node *orig_node, uint8_t new_gwflags)
{
struct hlist_node *node;
- struct gw_node *gw_node;
+ struct gw_node *gw_node, *curr_gw;
+
+ curr_gw = gw_get_selected_gw_node(bat_priv);
+ if (!curr_gw)
+ goto out;
rcu_read_lock();
hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
@@@ -312,22 -333,26 +333,26 @@@
"Gateway %pM removed from gateway list\n",
orig_node->orig);
- if (gw_node == rcu_dereference(bat_priv->curr_gw)) {
- rcu_read_unlock();
- gw_deselect(bat_priv);
- return;
- }
+ if (gw_node == curr_gw)
+ goto deselect;
}
- rcu_read_unlock();
- return;
+ goto unlock;
}
- rcu_read_unlock();
if (new_gwflags == 0)
- return;
+ goto unlock;
gw_node_add(bat_priv, orig_node, new_gwflags);
+ goto unlock;
+
+ deselect:
+ gw_deselect(bat_priv);
+ unlock:
+ rcu_read_unlock();
+ out:
+ if (curr_gw)
+ gw_node_free_ref(curr_gw);
}
void gw_node_delete(struct bat_priv *bat_priv, struct orig_node *orig_node)
@@@ -337,9 -362,12 +362,12 @@@
void gw_node_purge(struct bat_priv *bat_priv)
{
- struct gw_node *gw_node;
+ struct gw_node *gw_node, *curr_gw;
struct hlist_node *node, *node_tmp;
unsigned long timeout = 2 * PURGE_TIMEOUT * HZ;
+ char do_deselect = 0;
+
+ curr_gw = gw_get_selected_gw_node(bat_priv);
spin_lock_bh(&bat_priv->gw_list_lock);
@@@ -350,41 -378,56 +378,56 @@@
atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE)
continue;
- if (rcu_dereference(bat_priv->curr_gw) == gw_node)
- gw_deselect(bat_priv);
+ if (curr_gw == gw_node)
+ do_deselect = 1;
hlist_del_rcu(&gw_node->list);
gw_node_free_ref(gw_node);
}
-
spin_unlock_bh(&bat_priv->gw_list_lock);
+
+ /* gw_deselect() needs to acquire the gw_list_lock */
+ if (do_deselect)
+ gw_deselect(bat_priv);
+
+ if (curr_gw)
+ gw_node_free_ref(curr_gw);
}
+ /**
+ * fails if orig_node has no router
+ */
static int _write_buffer_text(struct bat_priv *bat_priv,
struct seq_file *seq, struct gw_node *gw_node)
{
struct gw_node *curr_gw;
- int down, up, ret;
+ struct neigh_node *router;
+ int down, up, ret = -1;
gw_bandwidth_to_kbit(gw_node->orig_node->gw_flags, &down, &up);
- rcu_read_lock();
- curr_gw = rcu_dereference(bat_priv->curr_gw);
+ router = orig_node_get_router(gw_node->orig_node);
+ if (!router)
+ goto out;
- ret = seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %3i - %i%s/%i%s\n",
- (curr_gw == gw_node ? "=>" : " "),
- gw_node->orig_node->orig,
- gw_node->orig_node->router->tq_avg,
- gw_node->orig_node->router->addr,
- gw_node->orig_node->router->if_incoming->net_dev->name,
- gw_node->orig_node->gw_flags,
- (down > 2048 ? down / 1024 : down),
- (down > 2048 ? "MBit" : "KBit"),
- (up > 2048 ? up / 1024 : up),
- (up > 2048 ? "MBit" : "KBit"));
+ curr_gw = gw_get_selected_gw_node(bat_priv);
- rcu_read_unlock();
+ ret = seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %3i - %i%s/%i%s\n",
+ (curr_gw == gw_node ? "=>" : " "),
+ gw_node->orig_node->orig,
+ router->tq_avg, router->addr,
+ router->if_incoming->net_dev->name,
+ gw_node->orig_node->gw_flags,
+ (down > 2048 ? down / 1024 : down),
+ (down > 2048 ? "MBit" : "KBit"),
+ (up > 2048 ? up / 1024 : up),
+ (up > 2048 ? "MBit" : "KBit"));
+
+ neigh_node_free_ref(router);
+ if (curr_gw)
+ gw_node_free_ref(curr_gw);
+ out:
return ret;
}
@@@ -422,10 -465,10 +465,10 @@@ int gw_client_seq_print_text(struct seq
if (gw_node->deleted)
continue;
- if (!gw_node->orig_node->router)
+ /* fails if orig_node has no router */
+ if (_write_buffer_text(bat_priv, seq, gw_node) < 0)
continue;
- _write_buffer_text(bat_priv, seq, gw_node);
gw_count++;
}
rcu_read_unlock();
@@@ -442,6 -485,7 +485,7 @@@ int gw_is_target(struct bat_priv *bat_p
struct iphdr *iphdr;
struct ipv6hdr *ipv6hdr;
struct udphdr *udphdr;
+ struct gw_node *curr_gw;
unsigned int header_len = 0;
if (atomic_read(&bat_priv->gw_mode) == GW_MODE_OFF)
@@@ -506,12 -550,11 +550,11 @@@
if (atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER)
return -1;
- rcu_read_lock();
- if (!rcu_dereference(bat_priv->curr_gw)) {
- rcu_read_unlock();
+ curr_gw = gw_get_selected_gw_node(bat_priv);
+ if (!curr_gw)
return 0;
- }
- rcu_read_unlock();
+ if (curr_gw)
+ gw_node_free_ref(curr_gw);
return 1;
}
diff --combined net/batman-adv/gateway_client.h
index 2aa4391,1ce8c60..1ce8c60
--- a/net/batman-adv/gateway_client.h
+++ b/net/batman-adv/gateway_client.h
@@@ -24,7 -24,7 +24,7 @@@
void gw_deselect(struct bat_priv *bat_priv);
void gw_election(struct bat_priv *bat_priv);
- void *gw_get_selected(struct bat_priv *bat_priv);
+ struct orig_node *gw_get_selected_orig(struct bat_priv *bat_priv);
void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node);
void gw_node_update(struct bat_priv *bat_priv,
struct orig_node *orig_node, uint8_t new_gwflags);
diff --combined net/batman-adv/icmp_socket.c
index 34ce56c,49079c2..49079c2
--- a/net/batman-adv/icmp_socket.c
+++ b/net/batman-adv/icmp_socket.c
@@@ -218,23 -218,13 +218,13 @@@ static ssize_t bat_socket_write(struct
if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
goto dst_unreach;
- rcu_read_lock();
orig_node = orig_hash_find(bat_priv, icmp_packet->dst);
-
if (!orig_node)
- goto unlock;
-
- neigh_node = orig_node->router;
+ goto dst_unreach;
+ neigh_node = orig_node_get_router(orig_node);
if (!neigh_node)
- goto unlock;
-
- if (!atomic_inc_not_zero(&neigh_node->refcount)) {
- neigh_node = NULL;
- goto unlock;
- }
-
- rcu_read_unlock();
+ goto dst_unreach;
if (!neigh_node->if_incoming)
goto dst_unreach;
@@@ -252,8 -242,6 +242,6 @@@
send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
goto out;
- unlock:
- rcu_read_unlock();
dst_unreach:
icmp_packet->msg_type = DESTINATION_UNREACHABLE;
bat_socket_add_packet(socket_client, icmp_packet, packet_len);
diff --combined net/batman-adv/originator.c
index 0b91330,5b8fe32..5b8fe32
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@@ -70,6 -70,21 +70,21 @@@ void neigh_node_free_ref(struct neigh_n
call_rcu(&neigh_node->rcu, neigh_node_free_rcu);
}
+ /* increases the refcounter of a found router */
+ struct neigh_node *orig_node_get_router(struct orig_node *orig_node)
+ {
+ struct neigh_node *router;
+
+ rcu_read_lock();
+ router = rcu_dereference(orig_node->router);
+
+ if (router && !atomic_inc_not_zero(&router->refcount))
+ router = NULL;
+
+ rcu_read_unlock();
+ return router;
+ }
+
struct neigh_node *create_neighbor(struct orig_node *orig_node,
struct orig_node *orig_neigh_node,
uint8_t *neigh,
@@@ -87,6 -102,7 +102,7 @@@
INIT_HLIST_NODE(&neigh_node->list);
INIT_LIST_HEAD(&neigh_node->bonding_list);
+ spin_lock_init(&neigh_node->tq_lock);
memcpy(neigh_node->addr, neigh, ETH_ALEN);
neigh_node->orig_node = orig_neigh_node;
@@@ -390,7 -406,7 +406,7 @@@ int orig_seq_print_text(struct seq_fil
struct hlist_node *node, *node_tmp;
struct hlist_head *head;
struct orig_node *orig_node;
- struct neigh_node *neigh_node;
+ struct neigh_node *neigh_node, *neigh_node_tmp;
int batman_count = 0;
int last_seen_secs;
int last_seen_msecs;
@@@ -421,37 -437,41 +437,41 @@@
rcu_read_lock();
hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
- if (!orig_node->router)
+ neigh_node = orig_node_get_router(orig_node);
+ if (!neigh_node)
continue;
- if (orig_node->router->tq_avg == 0)
- continue;
+ if (neigh_node->tq_avg == 0)
+ goto next;
last_seen_secs = jiffies_to_msecs(jiffies -
orig_node->last_valid) / 1000;
last_seen_msecs = jiffies_to_msecs(jiffies -
orig_node->last_valid) % 1000;
- neigh_node = orig_node->router;
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, node_tmp,
+ hlist_for_each_entry_rcu(neigh_node_tmp, node_tmp,
&orig_node->neigh_list, list) {
- seq_printf(seq, " %pM (%3i)", neigh_node->addr,
- neigh_node->tq_avg);
+ seq_printf(seq, " %pM (%3i)",
+ neigh_node_tmp->addr,
+ neigh_node_tmp->tq_avg);
}
seq_printf(seq, "\n");
batman_count++;
+
+ next:
+ neigh_node_free_ref(neigh_node);
}
rcu_read_unlock();
}
- if ((batman_count == 0))
+ if (batman_count == 0)
seq_printf(seq, "No batman nodes in range ...\n");
return 0;
diff --combined net/batman-adv/originator.h
index 5cc0110,e1d641f..e1d641f
--- a/net/batman-adv/originator.h
+++ b/net/batman-adv/originator.h
@@@ -34,6 -34,7 +34,7 @@@ struct neigh_node *create_neighbor(stru
uint8_t *neigh,
struct hard_iface *if_incoming);
void neigh_node_free_ref(struct neigh_node *neigh_node);
+ struct neigh_node *orig_node_get_router(struct orig_node *orig_node);
int orig_seq_print_text(struct seq_file *seq, void *offset);
int orig_hash_add_if(struct hard_iface *hard_iface, int max_if_num);
int orig_hash_del_if(struct hard_iface *hard_iface, int max_if_num);
diff --combined net/batman-adv/routing.c
index c172f5d,f6c6422..f6c6422
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@@ -87,18 -87,20 +87,20 @@@ static void update_route(struct bat_pri
struct neigh_node *neigh_node,
unsigned char *hna_buff, int hna_buff_len)
{
- struct neigh_node *neigh_node_tmp;
+ struct neigh_node *curr_router;
+
+ curr_router = orig_node_get_router(orig_node);
/* route deleted */
- if ((orig_node->router) && (!neigh_node)) {
+ if ((curr_router) && (!neigh_node)) {
bat_dbg(DBG_ROUTES, bat_priv, "Deleting route towards: %pM\n",
orig_node->orig);
hna_global_del_orig(bat_priv, orig_node,
"originator timed out");
- /* route added */
- } else if ((!orig_node->router) && (neigh_node)) {
+ /* route added */
+ } else if ((!curr_router) && (neigh_node)) {
bat_dbg(DBG_ROUTES, bat_priv,
"Adding route towards: %pM (via %pM)\n",
@@@ -106,21 -108,29 +108,29 @@@
hna_global_add_orig(bat_priv, orig_node,
hna_buff, hna_buff_len);
- /* route changed */
+ /* route changed */
} else {
bat_dbg(DBG_ROUTES, bat_priv,
"Changing route towards: %pM "
"(now via %pM - was via %pM)\n",
orig_node->orig, neigh_node->addr,
- orig_node->router->addr);
+ curr_router->addr);
}
+ if (curr_router)
+ neigh_node_free_ref(curr_router);
+
+ /* increase refcount of new best neighbor */
if (neigh_node && !atomic_inc_not_zero(&neigh_node->refcount))
neigh_node = NULL;
- neigh_node_tmp = orig_node->router;
- orig_node->router = neigh_node;
- if (neigh_node_tmp)
- neigh_node_free_ref(neigh_node_tmp);
+
+ spin_lock_bh(&orig_node->neigh_list_lock);
+ rcu_assign_pointer(orig_node->router, neigh_node);
+ spin_unlock_bh(&orig_node->neigh_list_lock);
+
+ /* decrease refcount of previous best neighbor */
+ if (curr_router)
+ neigh_node_free_ref(curr_router);
}
@@@ -128,16 -138,23 +138,23 @@@ void update_routes(struct bat_priv *bat
struct neigh_node *neigh_node, unsigned char *hna_buff,
int hna_buff_len)
{
+ struct neigh_node *router = NULL;
if (!orig_node)
- return;
+ goto out;
- if (orig_node->router != neigh_node)
+ router = orig_node_get_router(orig_node);
+
+ if (router != neigh_node)
update_route(bat_priv, orig_node, neigh_node,
hna_buff, hna_buff_len);
/* may be just HNA changed */
else
update_HNA(bat_priv, orig_node, hna_buff, hna_buff_len);
+
+ out:
+ if (router)
+ neigh_node_free_ref(router);
}
static int is_bidirectional_neigh(struct orig_node *orig_node,
@@@ -288,8 -305,8 +305,8 @@@ static void bonding_candidate_add(struc
struct neigh_node *neigh_node)
{
struct hlist_node *node;
- struct neigh_node *tmp_neigh_node;
- uint8_t best_tq, interference_candidate = 0;
+ struct neigh_node *tmp_neigh_node, *router = NULL;
+ uint8_t interference_candidate = 0;
spin_lock_bh(&orig_node->neigh_list_lock);
@@@ -298,13 -315,12 +315,12 @@@
neigh_node->orig_node->primary_addr))
goto candidate_del;
- if (!orig_node->router)
+ router = orig_node_get_router(orig_node);
+ if (!router)
goto candidate_del;
- best_tq = orig_node->router->tq_avg;
-
/* ... and is good enough to be considered */
- if (neigh_node->tq_avg < best_tq - BONDING_TQ_THRESHOLD)
+ if (neigh_node->tq_avg < router->tq_avg - BONDING_TQ_THRESHOLD)
goto candidate_del;
/**
@@@ -350,7 -366,9 +366,9 @@@ candidate_del
out:
spin_unlock_bh(&orig_node->neigh_list_lock);
- return;
+
+ if (router)
+ neigh_node_free_ref(router);
}
/* copy primary address for bonding */
@@@ -373,6 -391,7 +391,7 @@@ static void update_orig(struct bat_pri
char is_duplicate)
{
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
+ struct neigh_node *router = NULL;
struct orig_node *orig_node_tmp;
struct hlist_node *node;
int tmp_hna_buff_len;
@@@ -396,10 -415,12 +415,12 @@@
if (is_duplicate)
continue;
+ spin_lock_bh(&tmp_neigh_node->tq_lock);
ring_buffer_set(tmp_neigh_node->tq_recv,
&tmp_neigh_node->tq_index, 0);
tmp_neigh_node->tq_avg =
ring_buffer_avg(tmp_neigh_node->tq_recv);
+ spin_unlock_bh(&tmp_neigh_node->tq_lock);
}
if (!neigh_node) {
@@@ -424,10 -445,12 +445,12 @@@
orig_node->flags = batman_packet->flags;
neigh_node->last_valid = jiffies;
+ spin_lock_bh(&neigh_node->tq_lock);
ring_buffer_set(neigh_node->tq_recv,
&neigh_node->tq_index,
batman_packet->tq);
neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv);
+ spin_unlock_bh(&neigh_node->tq_lock);
if (!is_duplicate) {
orig_node->last_ttl = batman_packet->ttl;
@@@ -441,19 -464,18 +464,18 @@@
/* if this neighbor already is our next hop there is nothing
* to change */
- if (orig_node->router == neigh_node)
+ router = orig_node_get_router(orig_node);
+ if (router == neigh_node)
goto update_hna;
/* if this neighbor does not offer a better TQ we won't consider it */
- if ((orig_node->router) &&
- (orig_node->router->tq_avg > neigh_node->tq_avg))
+ if (router && (router->tq_avg > neigh_node->tq_avg))
goto update_hna;
/* if the TQ is the same and the link not more symetric we
* won't consider it either */
- if ((orig_node->router) &&
- (neigh_node->tq_avg == orig_node->router->tq_avg)) {
- orig_node_tmp = orig_node->router->orig_node;
+ if (router && (neigh_node->tq_avg == router->tq_avg)) {
+ orig_node_tmp = router->orig_node;
spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
bcast_own_sum_orig =
orig_node_tmp->bcast_own_sum[if_incoming->if_num];
@@@ -474,7 -496,7 +496,7 @@@
goto update_gw;
update_hna:
- update_routes(bat_priv, orig_node, orig_node->router,
+ update_routes(bat_priv, orig_node, router,
hna_buff, tmp_hna_buff_len);
update_gw:
@@@ -496,6 -518,8 +518,8 @@@ unlock
out:
if (neigh_node)
neigh_node_free_ref(neigh_node);
+ if (router)
+ neigh_node_free_ref(router);
}
/* checks whether the host restarted and is in the protection time.
@@@ -603,6 -627,8 +627,8 @@@ void receive_bat_packet(struct ethhdr *
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct hard_iface *hard_iface;
struct orig_node *orig_neigh_node, *orig_node;
+ struct neigh_node *router = NULL, *router_router = NULL;
+ struct neigh_node *orig_neigh_router = NULL;
char has_directlink_flag;
char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
char is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
@@@ -747,14 -773,15 +773,15 @@@
goto out;
}
+ router = orig_node_get_router(orig_node);
+ if (router)
+ router_router = orig_node_get_router(router->orig_node);
+
/* avoid temporary routing loops */
- if ((orig_node->router) &&
- (orig_node->router->orig_node->router) &&
- (compare_eth(orig_node->router->addr,
- batman_packet->prev_sender)) &&
+ if (router && router_router &&
+ (compare_eth(router->addr, batman_packet->prev_sender)) &&
!(compare_eth(batman_packet->orig, batman_packet->prev_sender)) &&
- (compare_eth(orig_node->router->addr,
- orig_node->router->orig_node->router->addr))) {
+ (compare_eth(router->addr, router_router->addr))) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: ignoring all rebroadcast packets that "
"may make me loop (sender: %pM)\n", ethhdr->h_source);
@@@ -769,9 -796,11 +796,11 @@@
if (!orig_neigh_node)
goto out;
+ orig_neigh_router = orig_node_get_router(orig_neigh_node);
+
/* drop packet if sender is not a direct neighbor and if we
* don't route towards it */
- if (!is_single_hop_neigh && (!orig_neigh_node->router)) {
+ if (!is_single_hop_neigh && (!orig_neigh_router)) {
bat_dbg(DBG_BATMAN, bat_priv,
"Drop packet: OGM via unknown neighbor!\n");
goto out_neigh;
@@@ -825,6 -854,13 +854,13 @@@ out_neigh
if ((orig_neigh_node) && (!is_single_hop_neigh))
orig_node_free_ref(orig_neigh_node);
out:
+ if (router)
+ neigh_node_free_ref(router);
+ if (router_router)
+ neigh_node_free_ref(router_router);
+ if (orig_neigh_router)
+ neigh_node_free_ref(orig_neigh_router);
+
orig_node_free_ref(orig_node);
}
@@@ -869,7 -905,7 +905,7 @@@ static int recv_my_icmp_packet(struct b
struct sk_buff *skb, size_t icmp_len)
{
struct orig_node *orig_node = NULL;
- struct neigh_node *neigh_node = NULL;
+ struct neigh_node *router = NULL;
struct icmp_packet_rr *icmp_packet;
int ret = NET_RX_DROP;
@@@ -886,23 -922,13 +922,13 @@@
/* answer echo request (ping) */
/* get routing information */
- rcu_read_lock();
orig_node = orig_hash_find(bat_priv, icmp_packet->orig);
-
if (!orig_node)
- goto unlock;
-
- neigh_node = orig_node->router;
-
- if (!neigh_node)
- goto unlock;
-
- if (!atomic_inc_not_zero(&neigh_node->refcount)) {
- neigh_node = NULL;
- goto unlock;
- }
+ goto out;
- rcu_read_unlock();
+ router = orig_node_get_router(orig_node);
+ if (!router)
+ goto out;
/* create a copy of the skb, if needed, to modify it. */
if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
@@@ -916,15 -942,12 +942,12 @@@
icmp_packet->msg_type = ECHO_REPLY;
icmp_packet->ttl = TTL;
- send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+ send_skb_packet(skb, router->if_incoming, router->addr);
ret = NET_RX_SUCCESS;
- goto out;
- unlock:
- rcu_read_unlock();
out:
- if (neigh_node)
- neigh_node_free_ref(neigh_node);
+ if (router)
+ neigh_node_free_ref(router);
if (orig_node)
orig_node_free_ref(orig_node);
return ret;
@@@ -934,7 -957,7 +957,7 @@@ static int recv_icmp_ttl_exceeded(struc
struct sk_buff *skb)
{
struct orig_node *orig_node = NULL;
- struct neigh_node *neigh_node = NULL;
+ struct neigh_node *router = NULL;
struct icmp_packet *icmp_packet;
int ret = NET_RX_DROP;
@@@ -952,23 -975,13 +975,13 @@@
goto out;
/* get routing information */
- rcu_read_lock();
orig_node = orig_hash_find(bat_priv, icmp_packet->orig);
-
if (!orig_node)
- goto unlock;
-
- neigh_node = orig_node->router;
-
- if (!neigh_node)
- goto unlock;
-
- if (!atomic_inc_not_zero(&neigh_node->refcount)) {
- neigh_node = NULL;
- goto unlock;
- }
+ goto out;
- rcu_read_unlock();
+ router = orig_node_get_router(orig_node);
+ if (!router)
+ goto out;
/* create a copy of the skb, if needed, to modify it. */
if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
@@@ -982,15 -995,12 +995,12 @@@
icmp_packet->msg_type = TTL_EXCEEDED;
icmp_packet->ttl = TTL;
- send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+ send_skb_packet(skb, router->if_incoming, router->addr);
ret = NET_RX_SUCCESS;
- goto out;
- unlock:
- rcu_read_unlock();
out:
- if (neigh_node)
- neigh_node_free_ref(neigh_node);
+ if (router)
+ neigh_node_free_ref(router);
if (orig_node)
orig_node_free_ref(orig_node);
return ret;
@@@ -1003,7 -1013,7 +1013,7 @@@ int recv_icmp_packet(struct sk_buff *sk
struct icmp_packet_rr *icmp_packet;
struct ethhdr *ethhdr;
struct orig_node *orig_node = NULL;
- struct neigh_node *neigh_node = NULL;
+ struct neigh_node *router = NULL;
int hdr_size = sizeof(struct icmp_packet);
int ret = NET_RX_DROP;
@@@ -1050,23 -1060,13 +1060,13 @@@
return recv_icmp_ttl_exceeded(bat_priv, skb);
/* get routing information */
- rcu_read_lock();
orig_node = orig_hash_find(bat_priv, icmp_packet->dst);
-
if (!orig_node)
- goto unlock;
-
- neigh_node = orig_node->router;
-
- if (!neigh_node)
- goto unlock;
-
- if (!atomic_inc_not_zero(&neigh_node->refcount)) {
- neigh_node = NULL;
- goto unlock;
- }
+ goto out;
- rcu_read_unlock();
+ router = orig_node_get_router(orig_node);
+ if (!router)
+ goto out;
/* create a copy of the skb, if needed, to modify it. */
if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
@@@ -1078,20 -1078,117 +1078,117 @@@
icmp_packet->ttl--;
/* route it */
- send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+ send_skb_packet(skb, router->if_incoming, router->addr);
ret = NET_RX_SUCCESS;
- goto out;
- unlock:
- rcu_read_unlock();
out:
- if (neigh_node)
- neigh_node_free_ref(neigh_node);
+ if (router)
+ neigh_node_free_ref(router);
if (orig_node)
orig_node_free_ref(orig_node);
return ret;
}
+ /* In the bonding case, send the packets in a round
+ * robin fashion over the remaining interfaces.
+ *
+ * This method rotates the bonding list and increases the
+ * returned router's refcount. */
+ static struct neigh_node *find_bond_router(struct orig_node *primary_orig,
+ struct hard_iface *recv_if)
+ {
+ struct neigh_node *tmp_neigh_node;
+ struct neigh_node *router = NULL, *first_candidate = NULL;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(tmp_neigh_node, &primary_orig->bond_list,
+ bonding_list) {
+ if (!first_candidate)
+ first_candidate = tmp_neigh_node;
+
+ /* recv_if == NULL on the first node. */
+ if (tmp_neigh_node->if_incoming == recv_if)
+ continue;
+
+ if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
+ continue;
+
+ router = tmp_neigh_node;
+ break;
+ }
+
+ /* use the first candidate if nothing was found. */
+ if (!router && first_candidate &&
+ atomic_inc_not_zero(&first_candidate->refcount))
+ router = first_candidate;
+
+ if (!router)
+ goto out;
+
+ /* selected should point to the next element
+ * after the current router */
+ spin_lock_bh(&primary_orig->neigh_list_lock);
+ /* this is a list_move(), which unfortunately
+ * does not exist as rcu version */
+ list_del_rcu(&primary_orig->bond_list);
+ list_add_rcu(&primary_orig->bond_list,
+ &router->bonding_list);
+ spin_unlock_bh(&primary_orig->neigh_list_lock);
+
+ out:
+ rcu_read_unlock();
+ return router;
+ }
+
+ /* Interface Alternating: Use the best of the
+ * remaining candidates which are not using
+ * this interface.
+ *
+ * Increases the returned router's refcount */
+ static struct neigh_node *find_ifalter_router(struct orig_node *primary_orig,
+ struct hard_iface *recv_if)
+ {
+ struct neigh_node *tmp_neigh_node;
+ struct neigh_node *router = NULL, *first_candidate = NULL;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(tmp_neigh_node, &primary_orig->bond_list,
+ bonding_list) {
+ if (!first_candidate)
+ first_candidate = tmp_neigh_node;
+
+ /* recv_if == NULL on the first node. */
+ if (tmp_neigh_node->if_incoming == recv_if)
+ continue;
+
+ if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
+ continue;
+
+ /* if we don't have a router yet
+ * or this one is better, choose it. */
+ if ((!router) ||
+ (tmp_neigh_node->tq_avg > router->tq_avg)) {
+ /* decrement refcount of
+ * previously selected router */
+ if (router)
+ neigh_node_free_ref(router);
+
+ router = tmp_neigh_node;
+ atomic_inc_not_zero(&router->refcount);
+ }
+
+ neigh_node_free_ref(tmp_neigh_node);
+ }
+
+ /* use the first candidate if nothing was found. */
+ if (!router && first_candidate &&
+ atomic_inc_not_zero(&first_candidate->refcount))
+ router = first_candidate;
+
+ rcu_read_unlock();
+ return router;
+ }
+
/* find a suitable router for this originator, and use
* bonding if possible. increases the found neighbors
* refcount.*/
@@@ -1101,14 -1198,15 +1198,15 @@@ struct neigh_node *find_router(struct b
{
struct orig_node *primary_orig_node;
struct orig_node *router_orig;
- struct neigh_node *router, *first_candidate, *tmp_neigh_node;
+ struct neigh_node *router;
static uint8_t zero_mac[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
int bonding_enabled;
if (!orig_node)
return NULL;
- if (!orig_node->router)
+ router = orig_node_get_router(orig_node);
+ if (!router)
return NULL;
/* without bonding, the first node should
@@@ -1117,9 -1215,8 +1215,8 @@@
rcu_read_lock();
/* select default router to output */
- router = orig_node->router;
- router_orig = orig_node->router->orig_node;
- if (!router_orig || !atomic_inc_not_zero(&router->refcount)) {
+ router_orig = router->orig_node;
+ if (!router_orig) {
rcu_read_unlock();
return NULL;
}
@@@ -1151,88 -1248,17 +1248,17 @@@
if (atomic_read(&primary_orig_node->bond_candidates) < 2)
goto return_router;
-
/* all nodes between should choose a candidate which
* is is not on the interface where the packet came
* in. */
neigh_node_free_ref(router);
- first_candidate = NULL;
- router = NULL;
-
- if (bonding_enabled) {
- /* in the bonding case, send the packets in a round
- * robin fashion over the remaining interfaces. */
-
- list_for_each_entry_rcu(tmp_neigh_node,
- &primary_orig_node->bond_list, bonding_list) {
- if (!first_candidate)
- first_candidate = tmp_neigh_node;
- /* recv_if == NULL on the first node. */
- if (tmp_neigh_node->if_incoming != recv_if &&
- atomic_inc_not_zero(&tmp_neigh_node->refcount)) {
- router = tmp_neigh_node;
- break;
- }
- }
- /* use the first candidate if nothing was found. */
- if (!router && first_candidate &&
- atomic_inc_not_zero(&first_candidate->refcount))
- router = first_candidate;
-
- if (!router) {
- rcu_read_unlock();
- return NULL;
- }
-
- /* selected should point to the next element
- * after the current router */
- spin_lock_bh(&primary_orig_node->neigh_list_lock);
- /* this is a list_move(), which unfortunately
- * does not exist as rcu version */
- list_del_rcu(&primary_orig_node->bond_list);
- list_add_rcu(&primary_orig_node->bond_list,
- &router->bonding_list);
- spin_unlock_bh(&primary_orig_node->neigh_list_lock);
-
- } else {
- /* if bonding is disabled, use the best of the
- * remaining candidates which are not using
- * this interface. */
- list_for_each_entry_rcu(tmp_neigh_node,
- &primary_orig_node->bond_list, bonding_list) {
- if (!first_candidate)
- first_candidate = tmp_neigh_node;
-
- /* recv_if == NULL on the first node. */
- if (tmp_neigh_node->if_incoming == recv_if)
- continue;
-
- if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
- continue;
-
- /* if we don't have a router yet
- * or this one is better, choose it. */
- if ((!router) ||
- (tmp_neigh_node->tq_avg > router->tq_avg)) {
- /* decrement refcount of
- * previously selected router */
- if (router)
- neigh_node_free_ref(router);
-
- router = tmp_neigh_node;
- atomic_inc_not_zero(&router->refcount);
- }
-
- neigh_node_free_ref(tmp_neigh_node);
- }
+ if (bonding_enabled)
+ router = find_bond_router(primary_orig_node, recv_if);
+ else
+ router = find_ifalter_router(primary_orig_node, recv_if);
- /* use the first candidate if nothing was found. */
- if (!router && first_candidate &&
- atomic_inc_not_zero(&first_candidate->refcount))
- router = first_candidate;
- }
return_router:
rcu_read_unlock();
return router;
diff --combined net/batman-adv/send.c
index d49e54d,e78670c..e78670c
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@@ -308,6 -308,7 +308,7 @@@ void schedule_forward_packet(struct ori
struct hard_iface *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
+ struct neigh_node *router;
unsigned char in_tq, in_ttl, tq_avg = 0;
unsigned long send_time;
@@@ -316,6 -317,8 +317,8 @@@
return;
}
+ router = orig_node_get_router(orig_node);
+
in_tq = batman_packet->tq;
in_ttl = batman_packet->ttl;
@@@ -324,20 -327,22 +327,22 @@@
/* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast
* of our best tq value */
- if ((orig_node->router) && (orig_node->router->tq_avg != 0)) {
+ if (router && router->tq_avg != 0) {
/* rebroadcast ogm of best ranking neighbor as is */
- if (!compare_eth(orig_node->router->addr, ethhdr->h_source)) {
- batman_packet->tq = orig_node->router->tq_avg;
+ if (!compare_eth(router->addr, ethhdr->h_source)) {
+ batman_packet->tq = router->tq_avg;
- if (orig_node->router->last_ttl)
- batman_packet->ttl = orig_node->router->last_ttl
- - 1;
+ if (router->last_ttl)
+ batman_packet->ttl = router->last_ttl - 1;
}
- tq_avg = orig_node->router->tq_avg;
+ tq_avg = router->tq_avg;
}
+ if (router)
+ neigh_node_free_ref(router);
+
/* apply hop penalty */
batman_packet->tq = hop_penalty(batman_packet->tq, bat_priv);
diff --combined net/batman-adv/soft-interface.c
index 824e1f6,1f6f756..1f6f756
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@@ -90,10 -90,51 +90,51 @@@ static void softif_neigh_free_ref(struc
call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
}
+ static struct softif_neigh *softif_neigh_get_selected(struct bat_priv *bat_priv)
+ {
+ struct softif_neigh *neigh;
+
+ rcu_read_lock();
+ neigh = rcu_dereference(bat_priv->softif_neigh);
+
+ if (neigh && !atomic_inc_not_zero(&neigh->refcount))
+ neigh = NULL;
+
+ rcu_read_unlock();
+ return neigh;
+ }
+
+ static void softif_neigh_select(struct bat_priv *bat_priv,
+ struct softif_neigh *new_neigh)
+ {
+ struct softif_neigh *curr_neigh;
+
+ spin_lock_bh(&bat_priv->softif_neigh_lock);
+
+ if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount))
+ new_neigh = NULL;
+
+ curr_neigh = bat_priv->softif_neigh;
+ rcu_assign_pointer(bat_priv->softif_neigh, new_neigh);
+
+ if (curr_neigh)
+ softif_neigh_free_ref(curr_neigh);
+
+ spin_unlock_bh(&bat_priv->softif_neigh_lock);
+ }
+
+ static void softif_neigh_deselect(struct bat_priv *bat_priv)
+ {
+ softif_neigh_select(bat_priv, NULL);
+ }
+
void softif_neigh_purge(struct bat_priv *bat_priv)
{
- struct softif_neigh *softif_neigh, *softif_neigh_tmp;
+ struct softif_neigh *softif_neigh, *curr_softif_neigh;
struct hlist_node *node, *node_tmp;
+ char do_deselect = 0;
+
+ curr_softif_neigh = softif_neigh_get_selected(bat_priv);
spin_lock_bh(&bat_priv->softif_neigh_lock);
@@@ -105,22 -146,26 +146,26 @@@
(atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
continue;
- hlist_del_rcu(&softif_neigh->list);
-
- if (bat_priv->softif_neigh == softif_neigh) {
+ if (curr_softif_neigh == softif_neigh) {
bat_dbg(DBG_ROUTES, bat_priv,
"Current mesh exit point '%pM' vanished "
"(vid: %d).\n",
softif_neigh->addr, softif_neigh->vid);
- softif_neigh_tmp = bat_priv->softif_neigh;
- bat_priv->softif_neigh = NULL;
- softif_neigh_free_ref(softif_neigh_tmp);
+ do_deselect = 1;
}
+ hlist_del_rcu(&softif_neigh->list);
softif_neigh_free_ref(softif_neigh);
}
spin_unlock_bh(&bat_priv->softif_neigh_lock);
+
+ /* soft_neigh_deselect() needs to acquire the softif_neigh_lock */
+ if (do_deselect)
+ softif_neigh_deselect(bat_priv);
+
+ if (curr_softif_neigh)
+ softif_neigh_free_ref(curr_softif_neigh);
}
static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
@@@ -171,6 -216,7 +216,7 @@@ int softif_neigh_seq_print_text(struct
struct bat_priv *bat_priv = netdev_priv(net_dev);
struct softif_neigh *softif_neigh;
struct hlist_node *node;
+ struct softif_neigh *curr_softif_neigh;
if (!bat_priv->primary_if) {
return seq_printf(seq, "BATMAN mesh %s disabled - "
@@@ -180,14 -226,17 +226,17 @@@
seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
+ curr_softif_neigh = softif_neigh_get_selected(bat_priv);
rcu_read_lock();
hlist_for_each_entry_rcu(softif_neigh, node,
&bat_priv->softif_neigh_list, list)
seq_printf(seq, "%s %pM (vid: %d)\n",
- bat_priv->softif_neigh == softif_neigh
+ curr_softif_neigh == softif_neigh
? "=>" : " ", softif_neigh->addr,
softif_neigh->vid);
rcu_read_unlock();
+ if (curr_softif_neigh)
+ softif_neigh_free_ref(curr_softif_neigh);
return 0;
}
@@@ -198,7 -247,8 +247,8 @@@ static void softif_batman_recv(struct s
struct bat_priv *bat_priv = netdev_priv(dev);
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct batman_packet *batman_packet;
- struct softif_neigh *softif_neigh, *softif_neigh_tmp;
+ struct softif_neigh *softif_neigh;
+ struct softif_neigh *curr_softif_neigh = NULL;
if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
batman_packet = (struct batman_packet *)
@@@ -223,7 -273,8 +273,8 @@@
if (!softif_neigh)
goto err;
- if (bat_priv->softif_neigh == softif_neigh)
+ curr_softif_neigh = softif_neigh_get_selected(bat_priv);
+ if (curr_softif_neigh == softif_neigh)
goto out;
/* we got a neighbor but its mac is 'bigger' than ours */
@@@ -232,38 -283,39 +283,39 @@@
goto out;
/* switch to new 'smallest neighbor' */
- if ((bat_priv->softif_neigh) &&
- (memcmp(softif_neigh->addr, bat_priv->softif_neigh->addr,
+ if ((curr_softif_neigh) &&
+ (memcmp(softif_neigh->addr, curr_softif_neigh->addr,
ETH_ALEN) < 0)) {
bat_dbg(DBG_ROUTES, bat_priv,
"Changing mesh exit point from %pM (vid: %d) "
"to %pM (vid: %d).\n",
- bat_priv->softif_neigh->addr,
- bat_priv->softif_neigh->vid,
+ curr_softif_neigh->addr,
+ curr_softif_neigh->vid,
softif_neigh->addr, softif_neigh->vid);
- softif_neigh_tmp = bat_priv->softif_neigh;
- bat_priv->softif_neigh = softif_neigh;
- softif_neigh_free_ref(softif_neigh_tmp);
- /* we need to hold the additional reference */
- goto err;
+
+ softif_neigh_select(bat_priv, softif_neigh);
+ goto out;
}
/* close own batX device and use softif_neigh as exit node */
- if ((!bat_priv->softif_neigh) &&
+ if ((!curr_softif_neigh) &&
(memcmp(softif_neigh->addr,
bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
bat_dbg(DBG_ROUTES, bat_priv,
"Setting mesh exit point to %pM (vid: %d).\n",
softif_neigh->addr, softif_neigh->vid);
- bat_priv->softif_neigh = softif_neigh;
- /* we need to hold the additional reference */
- goto err;
+
+ softif_neigh_select(bat_priv, softif_neigh);
+ goto out;
}
out:
softif_neigh_free_ref(softif_neigh);
err:
kfree_skb(skb);
+ if (curr_softif_neigh)
+ softif_neigh_free_ref(curr_softif_neigh);
+
return;
}
@@@ -321,6 -373,7 +373,7 @@@ int interface_tx(struct sk_buff *skb, s
struct bat_priv *bat_priv = netdev_priv(soft_iface);
struct bcast_packet *bcast_packet;
struct vlan_ethhdr *vhdr;
+ struct softif_neigh *curr_softif_neigh = NULL;
int data_len = skb->len, ret;
short vid = -1;
bool do_bcast = false;
@@@ -348,7 -401,8 +401,8 @@@
* if we have a another chosen mesh exit node in range
* it will transport the packets to the mesh
*/
- if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid))
+ curr_softif_neigh = softif_neigh_get_selected(bat_priv);
+ if ((curr_softif_neigh) && (curr_softif_neigh->vid == vid))
goto dropped;
/* TODO: check this for locks */
@@@ -410,6 -464,8 +464,8 @@@ dropped
dropped_freed:
bat_priv->stats.tx_dropped++;
end:
+ if (curr_softif_neigh)
+ softif_neigh_free_ref(curr_softif_neigh);
return NETDEV_TX_OK;
}
@@@ -421,6 -477,7 +477,7 @@@ void interface_rx(struct net_device *so
struct unicast_packet *unicast_packet;
struct ethhdr *ethhdr;
struct vlan_ethhdr *vhdr;
+ struct softif_neigh *curr_softif_neigh = NULL;
short vid = -1;
int ret;
@@@ -450,7 -507,8 +507,8 @@@
* if we have a another chosen mesh exit node in range
* it will transport the packets to the non-mesh network
*/
- if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid)) {
+ curr_softif_neigh = softif_neigh_get_selected(bat_priv);
+ if (curr_softif_neigh && (curr_softif_neigh->vid == vid)) {
skb_push(skb, hdr_size);
unicast_packet = (struct unicast_packet *)skb->data;
@@@ -461,7 -519,7 +519,7 @@@
skb_reset_mac_header(skb);
memcpy(unicast_packet->dest,
- bat_priv->softif_neigh->addr, ETH_ALEN);
+ curr_softif_neigh->addr, ETH_ALEN);
ret = route_unicast_packet(skb, recv_if);
if (ret == NET_RX_DROP)
goto dropped;
@@@ -486,11 -544,13 +544,13 @@@
soft_iface->last_rx = jiffies;
netif_rx(skb);
- return;
+ goto out;
dropped:
kfree_skb(skb);
out:
+ if (curr_softif_neigh)
+ softif_neigh_free_ref(curr_softif_neigh);
return;
}
@@@ -524,6 -584,7 +584,7 @@@ static void interface_setup(struct net_
dev->hard_start_xmit = interface_tx;
#endif
dev->destructor = free_netdev;
+ dev->tx_queue_len = 0;
/**
* can't call min_mtu, because the needed variables
diff --combined net/batman-adv/types.h
index 83445cf,75123b1..75123b1
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@@ -67,7 -67,7 +67,7 @@@ struct hard_iface
struct orig_node {
uint8_t orig[ETH_ALEN];
uint8_t primary_addr[ETH_ALEN];
- struct neigh_node *router;
+ struct neigh_node __rcu *router; /* rcu protected pointer */
unsigned long *bcast_own;
uint8_t *bcast_own_sum;
unsigned long last_valid;
@@@ -83,7 -83,7 +83,7 @@@
uint32_t last_bcast_seqno;
struct hlist_head neigh_list;
struct list_head frag_list;
- spinlock_t neigh_list_lock; /* protects neighbor list */
+ spinlock_t neigh_list_lock; /* protects neigh_list and router */
atomic_t refcount;
struct rcu_head rcu;
struct hlist_node hash_entry;
@@@ -125,6 -125,7 +125,7 @@@ struct neigh_node
struct rcu_head rcu;
struct orig_node *orig_node;
struct hard_iface *if_incoming;
+ spinlock_t tq_lock; /* protects: tq_recv, tq_index */
};
@@@ -146,7 -147,7 +147,7 @@@ struct bat_priv
atomic_t batman_queue_left;
char num_ifaces;
struct hlist_head softif_neigh_list;
- struct softif_neigh *softif_neigh;
+ struct softif_neigh __rcu *softif_neigh;
struct debug_log *debug_log;
struct hard_iface *primary_if;
struct kobject *mesh_obj;
diff --combined net/batman-adv/unicast.c
index 19f84bd,d46acc8..d46acc8
--- a/net/batman-adv/unicast.c
+++ b/net/batman-adv/unicast.c
@@@ -289,7 -289,7 +289,7 @@@ int unicast_send_skb(struct sk_buff *sk
/* get routing information */
if (is_multicast_ether_addr(ethhdr->h_dest)) {
- orig_node = (struct orig_node *)gw_get_selected(bat_priv);
+ orig_node = (struct orig_node *)gw_get_selected_orig(bat_priv);
if (orig_node)
goto find_router;
}
diff --combined net/batman-adv/vis.c
index f90212f,d4cc4f5..d4cc4f5
--- a/net/batman-adv/vis.c
+++ b/net/batman-adv/vis.c
@@@ -558,6 -558,7 +558,7 @@@ static int find_best_vis_server(struct
struct vis_info *info)
{
struct hashtable_t *hash = bat_priv->orig_hash;
+ struct neigh_node *router;
struct hlist_node *node;
struct hlist_head *head;
struct orig_node *orig_node;
@@@ -571,13 -572,17 +572,17 @@@
rcu_read_lock();
hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
- if ((orig_node) && (orig_node->router) &&
- (orig_node->flags & VIS_SERVER) &&
- (orig_node->router->tq_avg > best_tq)) {
- best_tq = orig_node->router->tq_avg;
+ router = orig_node_get_router(orig_node);
+ if (!router)
+ continue;
+
+ if ((orig_node->flags & VIS_SERVER) &&
+ (router->tq_avg > best_tq)) {
+ best_tq = router->tq_avg;
memcpy(packet->target_orig, orig_node->orig,
ETH_ALEN);
}
+ neigh_node_free_ref(router);
}
rcu_read_unlock();
}
@@@ -605,7 -610,7 +610,7 @@@ static int generate_vis_packet(struct b
struct hlist_node *node;
struct hlist_head *head;
struct orig_node *orig_node;
- struct neigh_node *neigh_node;
+ struct neigh_node *router;
struct vis_info *info = (struct vis_info *)bat_priv->my_vis_info;
struct vis_packet *packet = (struct vis_packet *)info->skb_packet->data;
struct vis_info_entry *entry;
@@@ -633,30 -638,32 +638,32 @@@
rcu_read_lock();
hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
- neigh_node = orig_node->router;
-
- if (!neigh_node)
+ router = orig_node_get_router(orig_node);
+ if (!router)
continue;
- if (!compare_eth(neigh_node->addr, orig_node->orig))
- continue;
+ if (!compare_eth(router->addr, orig_node->orig))
+ goto next;
- if (neigh_node->if_incoming->if_status != IF_ACTIVE)
- continue;
+ if (router->if_incoming->if_status != IF_ACTIVE)
+ goto next;
- if (neigh_node->tq_avg < 1)
- continue;
+ if (router->tq_avg < 1)
+ goto next;
/* fill one entry into buffer. */
entry = (struct vis_info_entry *)
skb_put(info->skb_packet, sizeof(*entry));
memcpy(entry->src,
- neigh_node->if_incoming->net_dev->dev_addr,
+ router->if_incoming->net_dev->dev_addr,
ETH_ALEN);
memcpy(entry->dest, orig_node->orig, ETH_ALEN);
- entry->quality = neigh_node->tq_avg;
+ entry->quality = router->tq_avg;
packet->entries++;
+ next:
+ neigh_node_free_ref(router);
+
if (vis_packet_full(info))
goto unlock;
}
@@@ -725,6 -732,7 +732,7 @@@ static void purge_vis_packets(struct ba
static void broadcast_vis_packet(struct bat_priv *bat_priv,
struct vis_info *info)
{
+ struct neigh_node *router;
struct hashtable_t *hash = bat_priv->orig_hash;
struct hlist_node *node;
struct hlist_head *head;
@@@ -745,19 -753,26 +753,26 @@@
rcu_read_lock();
hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
/* if it's a vis server and reachable, send it. */
- if ((!orig_node) || (!orig_node->router))
- continue;
if (!(orig_node->flags & VIS_SERVER))
continue;
+
+ router = orig_node_get_router(orig_node);
+ if (!router)
+ continue;
+
/* don't send it if we already received the packet from
- * this node. */
+ * this node. */
if (recv_list_is_in(bat_priv, &info->recv_list,
- orig_node->orig))
+ orig_node->orig)) {
+ neigh_node_free_ref(router);
continue;
+ }
memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
- hard_iface = orig_node->router->if_incoming;
- memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ hard_iface = router->if_incoming;
+ memcpy(dstaddr, router->addr, ETH_ALEN);
+
+ neigh_node_free_ref(router);
skb = skb_clone(info->skb_packet, GFP_ATOMIC);
if (skb)
@@@ -772,45 -787,29 +787,29 @@@ static void unicast_vis_packet(struct b
struct vis_info *info)
{
struct orig_node *orig_node;
- struct neigh_node *neigh_node = NULL;
+ struct neigh_node *router = NULL;
struct sk_buff *skb;
struct vis_packet *packet;
packet = (struct vis_packet *)info->skb_packet->data;
- rcu_read_lock();
orig_node = orig_hash_find(bat_priv, packet->target_orig);
-
if (!orig_node)
- goto unlock;
+ goto out;
- neigh_node = orig_node->router;
-
- if (!neigh_node)
- goto unlock;
-
- if (!atomic_inc_not_zero(&neigh_node->refcount)) {
- neigh_node = NULL;
- goto unlock;
- }
-
- rcu_read_unlock();
+ router = orig_node_get_router(orig_node);
+ if (!router)
+ goto out;
skb = skb_clone(info->skb_packet, GFP_ATOMIC);
if (skb)
- send_skb_packet(skb, neigh_node->if_incoming,
- neigh_node->addr);
-
- goto out;
+ send_skb_packet(skb, router->if_incoming, router->addr);
- unlock:
- rcu_read_unlock();
out:
- if (neigh_node)
- neigh_node_free_ref(neigh_node);
+ if (router)
+ neigh_node_free_ref(router);
if (orig_node)
orig_node_free_ref(orig_node);
- return;
}
/* only send one vis packet. called from send_vis_packets() */
--
linux integration
