[B.A.T.M.A.N.] [PATCH] New translation table announcement mechanism patchset
by Antonio Quartulli
This patchset wants to introduce a new client announcement mechanism (previously
called HNA) which totally revises the old one.
B.A.T.M.A.N.-advanced manages clients by the means of two translation tables:
a local table and a global table. The first one stores all the clients directly
connected to the node itself while the second one stores all the clients which
are announced by other nodes in the mesh network.
In the current implementation the whole local table is sent within each OGM
causing a big protocol overhead.
The core of the new implementation, instead, consists in avoiding this part
and replace this procedure by sending only the local table _changes_ which
happened in the last OGM interval. In this way, every node will update its
global table applying the changes it finds in the OGM.
A roaming improvement is also provided exploiting the newly implemented
announcement mechanism.
Moreover the global and local translation table are now lock free and rcu
protected :-)
Patchset description:
1) Rename all the variables/functions/constants from *hna* to *tt*
2) Implement the new announcement mechanism
3) Implement the roaming optimisation
4) Protect by RCU the local and global table
** Patch 2/4 also introduces a dependency on the crc16 module since the new
mechanism uses the crc16 computation function provided by this module. **
For more details, please refer to the commit message of each patch.
Regards,
Antonio Quartulli
9 years, 8 months
- 6
- 47
[B.A.T.M.A.N.] [PATCH 1/2] batman-adv: multi vlan support for bridge loop detection
by Marek Lindner
The bridge loop detection for batman-adv allows the bat0 interface
to be bridged into an ethernet segment which other batman-adv nodes
are connected to. In order to also allow multiple VLANs on top of
the bat0 interface to be bridged into the ethernet segment this
patch extends the aforementioned bridge loop detection.
Signed-off-by: Marek Lindner <lindner_marek(a)yahoo.de>
---
main.c | 3 +-
soft-interface.c | 401 ++++++++++++++++++++++++++++++++++++++---------------
types.h | 19 ++-
3 files changed, 303 insertions(+), 120 deletions(-)
diff --git a/main.c b/main.c
index 709b33b..705e8be 100644
--- a/main.c
+++ b/main.c
@@ -87,11 +87,12 @@ int mesh_init(struct net_device *soft_iface)
spin_lock_init(&bat_priv->vis_hash_lock);
spin_lock_init(&bat_priv->vis_list_lock);
spin_lock_init(&bat_priv->softif_neigh_lock);
+ spin_lock_init(&bat_priv->softif_neigh_vid_lock);
INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
INIT_HLIST_HEAD(&bat_priv->gw_list);
- INIT_HLIST_HEAD(&bat_priv->softif_neigh_list);
+ INIT_HLIST_HEAD(&bat_priv->softif_neigh_vids);
if (originator_init(bat_priv) < 1)
goto err;
diff --git a/soft-interface.c b/soft-interface.c
index 1772e2b..7cd6ab1 100644
--- a/soft-interface.c
+++ b/soft-interface.c
@@ -86,99 +86,91 @@ static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
}
-static struct softif_neigh *softif_neigh_get_selected(struct bat_priv *bat_priv)
+static void softif_neigh_vid_free_rcu(struct rcu_head *rcu)
{
- 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, *curr_softif_neigh;
+ struct softif_neigh_vid *softif_neigh_vid;
+ struct softif_neigh *softif_neigh;
struct hlist_node *node, *node_tmp;
- char do_deselect = 0;
+ struct bat_priv *bat_priv;
- curr_softif_neigh = softif_neigh_get_selected(bat_priv);
+ softif_neigh_vid = container_of(rcu, struct softif_neigh_vid, rcu);
+ bat_priv = softif_neigh_vid->bat_priv;
spin_lock_bh(&bat_priv->softif_neigh_lock);
-
hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
- &bat_priv->softif_neigh_list, list) {
-
- if ((!time_after(jiffies, softif_neigh->last_seen +
- msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
- (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
- continue;
-
- 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);
- do_deselect = 1;
- }
-
+ &softif_neigh_vid->softif_neigh_list, list) {
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);
+ kfree(softif_neigh_vid);
+}
- if (curr_softif_neigh)
- softif_neigh_free_ref(curr_softif_neigh);
+static void softif_neigh_vid_free_ref(struct softif_neigh_vid *softif_neigh_vid)
+{
+ if (atomic_dec_and_test(&softif_neigh_vid->refcount))
+ call_rcu(&softif_neigh_vid->rcu, softif_neigh_vid_free_rcu);
+}
+
+static struct softif_neigh_vid *softif_neigh_vid_get(struct bat_priv *bat_priv,
+ short vid)
+{
+ struct softif_neigh_vid *softif_neigh_vid;
+ struct hlist_node *node;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(softif_neigh_vid, node,
+ &bat_priv->softif_neigh_vids, list) {
+ if (softif_neigh_vid->vid != vid)
+ continue;
+
+ if (!atomic_inc_not_zero(&softif_neigh_vid->refcount))
+ continue;
+
+ goto out;
+ }
+
+ softif_neigh_vid = kzalloc(sizeof(struct softif_neigh_vid),
+ GFP_ATOMIC);
+ if (!softif_neigh_vid)
+ goto out;
+
+ softif_neigh_vid->vid = vid;
+ softif_neigh_vid->bat_priv = bat_priv;
+
+ /* initialize with 2 - caller decrements counter by one */
+ atomic_set(&softif_neigh_vid->refcount, 2);
+ INIT_HLIST_HEAD(&softif_neigh_vid->softif_neigh_list);
+ INIT_HLIST_NODE(&softif_neigh_vid->list);
+ spin_lock_bh(&bat_priv->softif_neigh_vid_lock);
+ hlist_add_head_rcu(&softif_neigh_vid->list,
+ &bat_priv->softif_neigh_vids);
+ spin_unlock_bh(&bat_priv->softif_neigh_vid_lock);
+
+out:
+ rcu_read_unlock();
+ return softif_neigh_vid;
}
static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
uint8_t *addr, short vid)
{
- struct softif_neigh *softif_neigh;
+ struct softif_neigh_vid *softif_neigh_vid;
+ struct softif_neigh *softif_neigh = NULL;
struct hlist_node *node;
+ softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
+ if (!softif_neigh_vid)
+ goto out;
+
rcu_read_lock();
hlist_for_each_entry_rcu(softif_neigh, node,
- &bat_priv->softif_neigh_list, list) {
+ &softif_neigh_vid->softif_neigh_list,
+ list) {
if (!compare_eth(softif_neigh->addr, addr))
continue;
- if (softif_neigh->vid != vid)
- continue;
-
if (!atomic_inc_not_zero(&softif_neigh->refcount))
continue;
@@ -191,30 +183,153 @@ static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
goto out;
memcpy(softif_neigh->addr, addr, ETH_ALEN);
- softif_neigh->vid = vid;
softif_neigh->last_seen = jiffies;
/* initialize with 2 - caller decrements counter by one */
atomic_set(&softif_neigh->refcount, 2);
INIT_HLIST_NODE(&softif_neigh->list);
spin_lock_bh(&bat_priv->softif_neigh_lock);
- hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list);
+ hlist_add_head_rcu(&softif_neigh->list,
+ &softif_neigh_vid->softif_neigh_list);
spin_unlock_bh(&bat_priv->softif_neigh_lock);
out:
rcu_read_unlock();
+ if (softif_neigh_vid)
+ softif_neigh_vid_free_ref(softif_neigh_vid);
return softif_neigh;
}
+static struct softif_neigh *softif_neigh_get_selected(
+ struct softif_neigh_vid *softif_neigh_vid)
+{
+ struct softif_neigh *softif_neigh;
+
+ rcu_read_lock();
+ softif_neigh = rcu_dereference(softif_neigh_vid->softif_neigh);
+
+ if (softif_neigh && !atomic_inc_not_zero(&softif_neigh->refcount))
+ softif_neigh = NULL;
+
+ rcu_read_unlock();
+ return softif_neigh;
+}
+
+static struct softif_neigh *softif_neigh_vid_get_selected(
+ struct bat_priv *bat_priv,
+ short vid)
+{
+ struct softif_neigh_vid *softif_neigh_vid;
+ struct softif_neigh *softif_neigh = NULL;
+
+ softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
+ if (!softif_neigh_vid)
+ goto out;
+
+ softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
+out:
+ if (softif_neigh_vid)
+ softif_neigh_vid_free_ref(softif_neigh_vid);
+ return softif_neigh;
+}
+
+static void softif_neigh_vid_select(struct bat_priv *bat_priv,
+ struct softif_neigh *new_neigh,
+ short vid)
+{
+ struct softif_neigh_vid *softif_neigh_vid;
+ struct softif_neigh *curr_neigh;
+
+ softif_neigh_vid = softif_neigh_vid_get(bat_priv, vid);
+ if (!softif_neigh_vid)
+ goto out;
+
+ spin_lock_bh(&bat_priv->softif_neigh_lock);
+
+ if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount))
+ new_neigh = NULL;
+
+ curr_neigh = softif_neigh_vid->softif_neigh;
+ rcu_assign_pointer(softif_neigh_vid->softif_neigh, new_neigh);
+
+ if ((curr_neigh) && (!new_neigh))
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Removing mesh exit point on vid: %d (prev: %pM).\n",
+ vid, curr_neigh->addr);
+ else if ((curr_neigh) && (new_neigh))
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Changing mesh exit point on vid: %d from %pM "
+ "to %pM.\n", vid, curr_neigh->addr, new_neigh->addr);
+ else if ((!curr_neigh) && (new_neigh))
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Setting mesh exit point on vid: %d to %pM.\n",
+ vid, new_neigh->addr);
+
+ if (curr_neigh)
+ softif_neigh_free_ref(curr_neigh);
+
+ spin_unlock_bh(&bat_priv->softif_neigh_lock);
+
+out:
+ if (softif_neigh_vid)
+ softif_neigh_vid_free_ref(softif_neigh_vid);
+}
+
+static void softif_neigh_vid_deselect(struct bat_priv *bat_priv,
+ struct softif_neigh_vid *softif_neigh_vid)
+{
+ struct softif_neigh *curr_neigh;
+ struct softif_neigh *softif_neigh = NULL, *softif_neigh_tmp;
+ struct hard_iface *primary_if = NULL;
+ struct hlist_node *node;
+
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
+
+ /* find new softif_neigh immediately to avoid temporary loops */
+ rcu_read_lock();
+ curr_neigh = rcu_dereference(softif_neigh_vid->softif_neigh);
+
+ hlist_for_each_entry_rcu(softif_neigh_tmp, node,
+ &softif_neigh_vid->softif_neigh_list,
+ list) {
+ if (softif_neigh_tmp == curr_neigh)
+ continue;
+
+ /* we got a neighbor but its mac is 'bigger' than ours */
+ if (memcmp(primary_if->net_dev->dev_addr,
+ softif_neigh_tmp->addr, ETH_ALEN) < 0)
+ continue;
+
+ if (!atomic_inc_not_zero(&softif_neigh_tmp->refcount))
+ continue;
+
+ softif_neigh = softif_neigh_tmp;
+ goto out;
+ }
+
+ rcu_read_unlock();
+
+out:
+ softif_neigh_vid_select(bat_priv, softif_neigh, softif_neigh_vid->vid);
+
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ if (softif_neigh)
+ softif_neigh_free_ref(softif_neigh);
+}
+
int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
{
struct net_device *net_dev = (struct net_device *)seq->private;
struct bat_priv *bat_priv = netdev_priv(net_dev);
+ struct softif_neigh_vid *softif_neigh_vid;
struct softif_neigh *softif_neigh;
struct hard_iface *primary_if;
- struct hlist_node *node;
+ struct hlist_node *node, *node_tmp;
struct softif_neigh *curr_softif_neigh;
- int ret = 0;
+ int ret = 0, last_seen_secs, last_seen_msecs;
primary_if = primary_if_get_selected(bat_priv);
if (!primary_if) {
@@ -233,17 +348,33 @@ int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
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",
- curr_softif_neigh == softif_neigh
- ? "=>" : " ", softif_neigh->addr,
- softif_neigh->vid);
+ hlist_for_each_entry_rcu(softif_neigh_vid, node,
+ &bat_priv->softif_neigh_vids, list) {
+ seq_printf(seq, " %-15s %s on vid: %d\n",
+ "Originator", "last-seen", softif_neigh_vid->vid);
+
+ curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
+
+ hlist_for_each_entry_rcu(softif_neigh, node_tmp,
+ &softif_neigh_vid->softif_neigh_list,
+ list) {
+ last_seen_secs = jiffies_to_msecs(jiffies -
+ softif_neigh->last_seen) / 1000;
+ last_seen_msecs = jiffies_to_msecs(jiffies -
+ softif_neigh->last_seen) % 1000;
+ seq_printf(seq, "%s %pM %3i.%03is\n",
+ curr_softif_neigh == softif_neigh
+ ? "=>" : " ", softif_neigh->addr,
+ last_seen_secs, last_seen_msecs);
+ }
+
+ if (curr_softif_neigh)
+ softif_neigh_free_ref(curr_softif_neigh);
+
+ seq_printf(seq, "\n");
+ }
rcu_read_unlock();
- if (curr_softif_neigh)
- softif_neigh_free_ref(curr_softif_neigh);
out:
if (primary_if)
@@ -251,6 +382,69 @@ out:
return ret;
}
+void softif_neigh_purge(struct bat_priv *bat_priv)
+{
+ struct softif_neigh *softif_neigh, *curr_softif_neigh;
+ struct softif_neigh_vid *softif_neigh_vid;
+ struct hlist_node *node, *node_tmp, *node_tmp2;
+ char do_deselect = 0;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(softif_neigh_vid, node,
+ &bat_priv->softif_neigh_vids, list) {
+ if (!atomic_inc_not_zero(&softif_neigh_vid->refcount))
+ continue;
+
+ curr_softif_neigh = softif_neigh_get_selected(softif_neigh_vid);
+
+ spin_lock_bh(&bat_priv->softif_neigh_lock);
+ hlist_for_each_entry_safe(softif_neigh, node_tmp, node_tmp2,
+ &softif_neigh_vid->softif_neigh_list,
+ list) {
+ if ((!time_after(jiffies, softif_neigh->last_seen +
+ msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
+ (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
+ continue;
+
+ if (curr_softif_neigh == softif_neigh) {
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Current mesh exit point on vid: %d "
+ "'%pM' vanished.\n",
+ softif_neigh_vid->vid,
+ softif_neigh->addr);
+ 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_vid_deselect() needs to acquire the
+ * softif_neigh_lock */
+ if (do_deselect)
+ softif_neigh_vid_deselect(bat_priv, softif_neigh_vid);
+
+ if (curr_softif_neigh)
+ softif_neigh_free_ref(curr_softif_neigh);
+
+ softif_neigh_vid_free_ref(softif_neigh_vid);
+ }
+ rcu_read_unlock();
+
+ spin_lock_bh(&bat_priv->softif_neigh_vid_lock);
+ hlist_for_each_entry_safe(softif_neigh_vid, node, node_tmp,
+ &bat_priv->softif_neigh_vids, list) {
+ if (!hlist_empty(&softif_neigh_vid->softif_neigh_list))
+ continue;
+
+ hlist_del_rcu(&softif_neigh_vid->list);
+ softif_neigh_vid_free_ref(softif_neigh_vid);
+ }
+ spin_unlock_bh(&bat_priv->softif_neigh_vid_lock);
+
+}
+
static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
short vid)
{
@@ -283,10 +477,7 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
if (!softif_neigh)
goto out;
- curr_softif_neigh = softif_neigh_get_selected(bat_priv);
- if (!curr_softif_neigh)
- goto out;
-
+ curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
if (curr_softif_neigh == softif_neigh)
goto out;
@@ -299,33 +490,16 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
softif_neigh->addr, ETH_ALEN) < 0)
goto out;
- /* switch to new 'smallest neighbor' */
- 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",
- curr_softif_neigh->addr,
- curr_softif_neigh->vid,
- softif_neigh->addr, softif_neigh->vid);
-
- softif_neigh_select(bat_priv, softif_neigh);
- goto out;
- }
-
/* close own batX device and use softif_neigh as exit node */
- if ((!curr_softif_neigh) &&
- (memcmp(softif_neigh->addr,
- 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);
-
- softif_neigh_select(bat_priv, softif_neigh);
+ if (!curr_softif_neigh) {
+ softif_neigh_vid_select(bat_priv, softif_neigh, vid);
goto out;
}
+ /* switch to new 'smallest neighbor' */
+ if (memcmp(softif_neigh->addr, curr_softif_neigh->addr, ETH_ALEN) < 0)
+ softif_neigh_vid_select(bat_priv, softif_neigh, vid);
+
out:
kfree_skb(skb);
if (softif_neigh)
@@ -420,8 +594,8 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
* if we have a another chosen mesh exit node in range
* it will transport the packets to the mesh
*/
- curr_softif_neigh = softif_neigh_get_selected(bat_priv);
- if ((curr_softif_neigh) && (curr_softif_neigh->vid == vid))
+ curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
+ if (curr_softif_neigh)
goto dropped;
/* TODO: check this for locks */
@@ -529,8 +703,8 @@ void interface_rx(struct net_device *soft_iface,
* if we have a another chosen mesh exit node in range
* it will transport the packets to the non-mesh network
*/
- curr_softif_neigh = softif_neigh_get_selected(bat_priv);
- if (curr_softif_neigh && (curr_softif_neigh->vid == vid)) {
+ curr_softif_neigh = softif_neigh_vid_get_selected(bat_priv, vid);
+ if (curr_softif_neigh) {
skb_push(skb, hdr_size);
unicast_packet = (struct unicast_packet *)skb->data;
@@ -667,7 +841,6 @@ struct net_device *softif_create(char *name)
bat_priv->primary_if = NULL;
bat_priv->num_ifaces = 0;
- bat_priv->softif_neigh = NULL;
ret = sysfs_add_meshif(soft_iface);
if (ret < 0)
diff --git a/types.h b/types.h
index 947bafc..9ae507a 100644
--- a/types.h
+++ b/types.h
@@ -146,14 +146,13 @@ struct bat_priv {
atomic_t bcast_queue_left;
atomic_t batman_queue_left;
char num_ifaces;
- struct hlist_head softif_neigh_list;
- struct softif_neigh __rcu *softif_neigh;
struct debug_log *debug_log;
struct kobject *mesh_obj;
struct dentry *debug_dir;
struct hlist_head forw_bat_list;
struct hlist_head forw_bcast_list;
struct hlist_head gw_list;
+ struct hlist_head softif_neigh_vids;
struct list_head vis_send_list;
struct hashtable_t *orig_hash;
struct hashtable_t *hna_local_hash;
@@ -167,6 +166,7 @@ struct bat_priv {
spinlock_t vis_hash_lock; /* protects vis_hash */
spinlock_t vis_list_lock; /* protects vis_info::recv_list */
spinlock_t softif_neigh_lock; /* protects soft-interface neigh list */
+ spinlock_t softif_neigh_vid_lock; /* protects soft-interface vid list */
int16_t num_local_hna;
atomic_t hna_local_changed;
struct delayed_work hna_work;
@@ -270,12 +270,21 @@ struct recvlist_node {
uint8_t mac[ETH_ALEN];
};
-struct softif_neigh {
+struct softif_neigh_vid {
struct hlist_node list;
- uint8_t addr[ETH_ALEN];
- unsigned long last_seen;
+ struct bat_priv *bat_priv;
short vid;
atomic_t refcount;
+ struct softif_neigh __rcu *softif_neigh;
+ struct rcu_head rcu;
+ struct hlist_head softif_neigh_list;
+};
+
+struct softif_neigh {
+ struct hlist_node list;
+ uint8_t addr[ETH_ALEN];
+ unsigned long last_seen;
+ atomic_t refcount;
struct rcu_head rcu;
};
--
1.7.2.3
9 years, 8 months
- 2
- 4
[B.A.T.M.A.N.] [PATCHv2 1/3] batman-adv: Fix crash on module shutdown with multiple ifaces
by Sven Eckelmann
From: Linus Lüssing <linus.luessing(a)web.de>
hardif_remove_interfaces() removes all hard interfaces from the
hardif_list before freeing and cleaning up any device. However the clean
up procedures in orig_hash_del_if()
(hardif_remove_interface()->hardif_disable_interface()->
orig_hash_del_if()) need the other interfaces still to be present in the
hardif_list. Otherwise it won't renumber any preceding interfaces, which
leads to an unhandled kernel paging request in orig_node_del_if()'s
"/* copy second part */" due to wrong hard_if->if_num's.
With this commit the interface removal on module shutdown will be down
in the same way as removing single interfaces from batman only: One
interface will be removed and cleaned at a time.
Signed-off-by: Linus Lüssing <linus.luessing(a)web.de>
[sven(a)narfation.org: Keep locking around list_for_each_entry_safe]
Signed-off-by: Sven Eckelmann <sven(a)narfation.org>
---
Splitted the first patch to keep Linus' fame. There should be no difference
(after all patches are applied) between the first and the second version.
hard-interface.c | 11 ++---------
1 files changed, 2 insertions(+), 9 deletions(-)
diff --git a/hard-interface.c b/hard-interface.c
index b3058e4..c6edf0a 100644
--- a/hard-interface.c
+++ b/hard-interface.c
@@ -490,22 +490,15 @@ static void hardif_remove_interface(struct hard_iface *hard_iface)
void hardif_remove_interfaces(void)
{
struct hard_iface *hard_iface, *hard_iface_tmp;
- struct list_head if_queue;
-
- INIT_LIST_HEAD(&if_queue);
+ rtnl_lock();
spin_lock(&hardif_list_lock);
list_for_each_entry_safe(hard_iface, hard_iface_tmp,
&hardif_list, list) {
list_del_rcu(&hard_iface->list);
- list_add_tail(&hard_iface->list, &if_queue);
- }
- spin_unlock(&hardif_list_lock);
-
- rtnl_lock();
- list_for_each_entry_safe(hard_iface, hard_iface_tmp, &if_queue, list) {
hardif_remove_interface(hard_iface);
}
+ spin_unlock(&hardif_list_lock);
rtnl_unlock();
}
--
1.7.4.4
9 years, 8 months
- 2
- 7
[B.A.T.M.A.N.] [PATCH 1/2] batman-adv: Remove unnecessary hardif_list_lock
by Sven Eckelmann
hardif_list_lock is unneccessary because we already ensure that no
multiple admin operations can take place through rtnl_lock.
hardif_list_lock only adds additional overhead and complexity.
Critical functions now check whether they are called with rtnl_lock
using ASSERT_RTNL.
Signed-off-by: Sven Eckelmann <sven(a)narfation.org>
---
hard-interface.c | 23 +++++------------------
1 files changed, 5 insertions(+), 18 deletions(-)
diff --git a/hard-interface.c b/hard-interface.c
index b3058e4..ebd7ef0 100644
--- a/hard-interface.c
+++ b/hard-interface.c
@@ -31,9 +31,6 @@
#include <linux/if_arp.h>
-/* protect update critical side of hardif_list - but not the content */
-static DEFINE_SPINLOCK(hardif_list_lock);
-
static int batman_skb_recv(struct sk_buff *skb,
struct net_device *dev,
@@ -432,6 +429,8 @@ static struct hard_iface *hardif_add_interface(struct net_device *net_dev)
struct hard_iface *hard_iface;
int ret;
+ ASSERT_RTNL();
+
ret = is_valid_iface(net_dev);
if (ret != 1)
goto out;
@@ -458,10 +457,7 @@ static struct hard_iface *hardif_add_interface(struct net_device *net_dev)
atomic_set(&hard_iface->refcount, 2);
check_known_mac_addr(hard_iface->net_dev);
-
- spin_lock(&hardif_list_lock);
list_add_tail_rcu(&hard_iface->list, &hardif_list);
- spin_unlock(&hardif_list_lock);
return hard_iface;
@@ -475,6 +471,8 @@ out:
static void hardif_remove_interface(struct hard_iface *hard_iface)
{
+ ASSERT_RTNL();
+
/* first deactivate interface */
if (hard_iface->if_status != IF_NOT_IN_USE)
hardif_disable_interface(hard_iface);
@@ -490,20 +488,11 @@ static void hardif_remove_interface(struct hard_iface *hard_iface)
void hardif_remove_interfaces(void)
{
struct hard_iface *hard_iface, *hard_iface_tmp;
- struct list_head if_queue;
- INIT_LIST_HEAD(&if_queue);
-
- spin_lock(&hardif_list_lock);
+ rtnl_lock();
list_for_each_entry_safe(hard_iface, hard_iface_tmp,
&hardif_list, list) {
list_del_rcu(&hard_iface->list);
- list_add_tail(&hard_iface->list, &if_queue);
- }
- spin_unlock(&hardif_list_lock);
-
- rtnl_lock();
- list_for_each_entry_safe(hard_iface, hard_iface_tmp, &if_queue, list) {
hardif_remove_interface(hard_iface);
}
rtnl_unlock();
@@ -531,9 +520,7 @@ static int hard_if_event(struct notifier_block *this,
hardif_deactivate_interface(hard_iface);
break;
case NETDEV_UNREGISTER:
- spin_lock(&hardif_list_lock);
list_del_rcu(&hard_iface->list);
- spin_unlock(&hardif_list_lock);
hardif_remove_interface(hard_iface);
break;
--
1.7.4.4
9 years, 9 months
- 1
- 1
[B.A.T.M.A.N.] [PATCH] batman-adv: Fix crash on module shutdown with multiple ifaces
by Linus Lüssing
hardif_remove_interfaces() removes all hard interfaces from the
hardif_list before freeing and cleaning up any device. However the clean
up procedures in orig_hash_del_if()
(hardif_remove_interface()->hardif_disable_interface()->
orig_hash_del_if())
need the other interfaces still to be present in the hardif_list.
Otherwise it won't renumber any preceding interfaces, which leads to an
unhandled kernel paging request in orig_node_del_if()'s "/* copy second
part */" due to wrong hard_if->if_num's.
With this commit the interface removal on module shutdown will be down
in the same way as removing single interfaces from batman only: One
interface will be removed and cleaned at a time.
Signed-off-by: Linus Lüssing <linus.luessing(a)web.de>
---
hard-interface.c | 15 ++++-----------
1 files changed, 4 insertions(+), 11 deletions(-)
diff --git a/hard-interface.c b/hard-interface.c
index b3058e4..f039a3d 100644
--- a/hard-interface.c
+++ b/hard-interface.c
@@ -490,20 +490,13 @@ static void hardif_remove_interface(struct hard_iface *hard_iface)
void hardif_remove_interfaces(void)
{
struct hard_iface *hard_iface, *hard_iface_tmp;
- struct list_head if_queue;
- INIT_LIST_HEAD(&if_queue);
-
- spin_lock(&hardif_list_lock);
- list_for_each_entry_safe(hard_iface, hard_iface_tmp,
- &hardif_list, list) {
+ rtnl_lock();
+ list_for_each_entry_safe(hard_iface, hard_iface_tmp, &hardif_list, list) {
+ spin_lock(&hardif_list_lock);
list_del_rcu(&hard_iface->list);
- list_add_tail(&hard_iface->list, &if_queue);
- }
- spin_unlock(&hardif_list_lock);
+ spin_unlock(&hardif_list_lock);
- rtnl_lock();
- list_for_each_entry_safe(hard_iface, hard_iface_tmp, &if_queue, list) {
hardif_remove_interface(hard_iface);
}
rtnl_unlock();
--
1.7.4.1
9 years, 9 months
- 2
- 4
[B.A.T.M.A.N.] Batmand - ping 169.254.0.0 from client is not working.
by Krzysiek Gołębiewski
Hello all!
From quite long time I was trying to configure batmand. I am a student
and my M.A. thesis is based on MESH. I have chosen a batman_adv and
batmand to compare it (performance f.e). Batman_adv is working for me (I
used an instruction from another page) and now I would like to configure
batmand. Finally I have found this website.
My devices:
Now I have Asus WL-500gPremium router with Mini PCI Atheros inside. On
both routers there is Backfire 10.03.1-rc4. I have installed a package
batmand (Version: r1439-1) and also kmod-tun, libpthread and kmod-batgat
too.
Thanks to earlier posts in this archive I could run batmand and do some
configuration (based on posts from another users from here and some own
initiative and ideas.
Now my settings are:
GATEWAY:
/ETC/CONFIG/WIRELESS:
config 'wifi-device' 'wifi0'
option 'type' 'atheros'
option 'disabled' '0'
option 'channel' '1'
option 'txpower' '1'
option 'hwmode' '11g'
config 'wifi-iface'
option 'device' 'wifi0'
option 'encryption' 'none'
option 'ssid' 'potato'
option 'bssid' '01:CA:FF:EE:BA:BE'
option 'swmerge' '1'
option 'mode' 'adhoc'
/ETC/CONFIG/NETWORK:
config 'switch' 'eth0'
option 'enable' '1'
config 'switch_vlan' 'eth0_0'
option 'device' 'eth0'
option 'vlan' '0'
option 'ports' '1 2 3 4 5'
config 'switch_vlan' 'eth0_1'
option 'device' 'eth0'
option 'vlan' '1'
option 'ports' '0 5'
config 'interface' 'loopback'
option 'ifname' 'lo'
option 'proto' 'static'
option 'ipaddr' '127.0.0.1'
option 'netmask' '255.0.0.0'
config 'interface' 'wan'
option 'ifname' 'eth0.1'
option 'proto' 'dhcp'
#option 'proto' 'static'
#option 'ipaddr' '10.130.1.1'
#option 'netmask' '255.255.255.0'
config 'interface' 'lan'
#option 'type' 'bridge'
option 'ifname' 'eth0.0'
option 'proto' 'static'
option 'ipaddr' '192.168.3.1'
option 'netmask' '255.255.255.0'
config 'interface' 'ath0'
option 'ifname' 'ath0'
option 'proto' 'static'
option 'ipaddr' '10.130.1.1'
option 'netmask' '255.255.255.0'
/ETC/CONFIG/FIREWALL
config defaults
option syn_flood 1
option input ACCEPT
option output ACCEPT
option forward REJECT
config zone
option name lan
option input ACCEPT
option output ACCEPT
option forward REJECT
config zone
option name wan
option input REJECT
option output ACCEPT
option forward REJECT
option masq 1
option mtu_fix 1
config forwarding
option src lan
option dest wan
config forwarding
option src wan
option dest lan
# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
option src wan
option proto udp
option dest_port 68
option target ACCEPT
#Allow ping
config rule
option src wan
option proto icmp
option icmp_type echo-request
option target ACCEPT
# include a file with users custom iptables rules
config include
option path /etc/firewall.user
### EXAMPLE CONFIG SECTIONS
# do not allow a specific ip to access wan
#config rule
# option src lan
# option src_ip 192.168.45.2
# option dest wan
# option proto tcp
# option target REJECT
# block a specific mac on wan
#config rule
# option dest wan
# option src_mac 00:11:22:33:44:66
# option target REJECT
# block incoming ICMP traffic on a zone
#config rule
# option src lan
# option proto ICMP
# option target DROP
# port redirect port coming in on wan to lan
#config redirect
# option src wan
# option src_dport 5001
# option dest lan
# option dest_ip 192.168.3.1
# option dest_port 5001
# option proto tcp
#config redirect
# option src wan
# option src_dport 5001
# option dest lan
# option dest_ip 192.168.3.1
# option dest_port 5001
# option proto udp
### FULL CONFIG SECTIONS
#config rule
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 80
# option dest wan
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
# option target REJECT
#config redirect
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 1024
# option src_dport 80
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
and one client (at least so far)
CLIENT:
/ETC/CONFIG/WIRELESS:
config 'wifi-device' 'wifi0'
option 'type' 'atheros'
option 'disabled' '0'
option 'channel' '1'
option 'txpower' '1'
option 'hwmode' '11g'
config 'wifi-iface'
option 'device' 'wifi0'
option 'encryption' 'none'
option 'ssid' 'potato'
option 'bssid' '01:CA:FF:EE:BA:BE'
option 'swmerge' '1'
option 'mode' 'adhoc'
/ETC/CONFIG/NETWORK:
config 'switch' 'eth0'
option 'enable' '1'
config 'switch_vlan' 'eth0_0'
option 'device' 'eth0'
option 'vlan' '0'
option 'ports' '1 2 3 4 5'
config 'switch_vlan' 'eth0_1'
option 'device' 'eth0'
option 'vlan' '1'
option 'ports' '0 5'
config 'interface' 'loopback'
option 'ifname' 'lo'
option 'proto' 'static'
option 'ipaddr' '127.0.0.1'
option 'netmask' '255.0.0.0'
config 'interface' 'wan'
#option 'type' 'bridge'
#list 'ifname' 'wifi0'
#option 'ifname' 'eth0.1'
#option 'dns' '10.130.1.1'
#option 'defaultroute' '0'
#option 'peerdns' '0'
#option 'proto' 'static'
#option 'ipaddr' '10.130.1.3'
#option 'netmask' '255.255.255.0'
#option 'gateway' '10.130.1.1'
config 'interface' 'lan'
option 'ifname' 'eth0.0'
option 'proto' 'static'
option 'netmask' '255.255.255.0'
option 'ipaddr' '192.168.4.1'
config 'interface' 'ath0'
option 'ifname' 'ath0'
option 'proto' 'static'
option 'ipaddr' '10.130.1.3'
option 'netmask' '255.255.255.0'
option 'gateway' '10.130.1.1'
option 'dns' '10.130.1.1'
/ETC/CONFIG/FIREWALL
config defaults
option syn_flood 1
option input ACCEPT
option output ACCEPT
option forward REJECT
config zone
option name lan
option input ACCEPT
option output ACCEPT
option forward REJECT
config zone
option name wan
option input REJECT
option output ACCEPT
option forward REJECT
option masq 1
option mtu_fix 1
config forwarding
option src lan
option dest wan
config forwarding
option src wan
option dest lan
# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
option src wan
option proto udp
option dest_port 68
option target ACCEPT
#Allow ping
config rule
option src wan
option proto icmp
option icmp_type echo-request
option target ACCEPT
# include a file with users custom iptables rules
config include
option path /etc/firewall.user
### EXAMPLE CONFIG SECTIONS
# do not allow a specific ip to access wan
#config rule
# option src lan
# option src_ip 192.168.45.2
# option dest wan
# option proto tcp
# option target REJECT
# block a specific mac on wan
#config rule
# option dest wan
# option src_mac 00:11:22:33:44:66
# option target REJECT
# block incoming ICMP traffic on a zone
#config rule
# option src lan
# option proto ICMP
# option target DROP
# port redirect port coming in on wan to lan
#config redirect
# option src wan
# option src_dport 5001
# option dest lan
# option dest_ip 192.168.2.140
# option dest_port 5001
# option proto tcp
#config redirect
# option src wan
# option src_dport 5001
# option dest lan
# option dest_ip 192.168.2.140
# option dest_port 5001
# option proto udp
### FULL CONFIG SECTIONS
#config rule
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 80
# option dest wan
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
# option target REJECT
#config redirect
# option src lan
# option src_ip 192.168.45.2
# option src_mac 00:11:22:33:44:55
# option src_port 1024
# option src_dport 80
# option dest_ip 194.25.2.129
# option dest_port 120
# option proto tcp
I start batmand with:
On the Gateway:
batmand -d 3 -g 11000 -a 192.168.3.0/24 --hop-penalty 5 --purge-timeout
50000 ath0
and on the client
batmand -d 3 -r 2 -a 192.168.4.0/24 --disable-client-nat --hop-penalty 5
--purge-timeout 50000 ath0
Then I check all:
batmand -d1 -c
On the gateway:
Originator (#/255) Nexthop [outgoingIF]: Potential nexthops
... [B.A.T.M.A.N. 0.4-alpha rv1439, MainIF/IP: ath0/10.130.1.1, UT: 0d
0h 1m]
10.130.1.3 (234) 10.130.1.3 [ ath0]: 10.130.1.3 (234)
On the client:
Originator (#/255) Nexthop [outgoingIF]: Potential
nexthops ... [B.A.T.M.A.N. 0.4-alpha rv1439, MainIF/IP: ath0/10.130.1.3,
UT: 0d 0h 3m]
10.130.1.1 (243) 10.130.1.1 [ ath0]: 10.130.1.1 (243)
batmand -d2 -c
On the gateway:
Gateway (#/255) Nexthop [outgoingIF], gw_class ...
[B.A.T.M.A.N. 0.4-alpha rv1439, MainIF/IP: ath0/10.130.1.1, UT: 0d 0h 2m]
No gateways in range ...
On the client:
I can see my gateway -> 10.130.1.1
Gateway (#/255) Nexthop [outgoingIF], gw_class ...
[B.A.T.M.A.N. 0.4-alpha rv1439, MainIF/IP: ath0/10.130.1.3, UT: 0d 0h 4m]
=> 10.130.1.1 (255) 10.130.1.1 [ ath0], gw_class 184 -
12MBit/1536KBit, gateway failures: 0
Command ifconfig showed:
on the gateway:
ath0 Link encap:Ethernet HWaddr 00:0E:8E:18:F7:91
inet addr:10.130.1.1 Bcast:10.130.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:517 errors:0 dropped:0 overruns:0 frame:0
TX packets:3301 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:28892 (28.2 KiB) TX bytes:213735 (208.7 KiB)
eth0 Link encap:Ethernet HWaddr 00:1A:92:7E:27:B7
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3709 errors:0 dropped:0 overruns:0 frame:0
TX packets:4320 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:351741 (343.4 KiB) TX bytes:754122 (736.4 KiB)
Interrupt:4
eth0.0 Link encap:Ethernet HWaddr 00:1A:92:7E:27:B7
inet addr:192.168.3.1 Bcast:192.168.3.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3581 errors:0 dropped:0 overruns:0 frame:0
TX packets:2304 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:274574 (268.1 KiB) TX bytes:602269 (588.1 KiB)
eth0.1 Link encap:Ethernet HWaddr 00:1A:92:7E:27:B7
inet addr:192.168.2.2 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:111 errors:0 dropped:0 overruns:0 frame:0
TX packets:2017 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9083 (8.8 KiB) TX bytes:105082 (102.6 KiB)
gate0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:169.254.0.0 P-t-P:169.254.0.0 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1471 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:214 errors:0 dropped:0 overruns:0 frame:0
TX packets:214 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:18654 (18.2 KiB) TX bytes:18654 (18.2 KiB)
wifi0 Link encap:UNSPEC HWaddr
00-0E-8E-18-F7-91-00-00-00-00-00-00-00-00-00-00
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6600 errors:0 dropped:0 overruns:0 frame:696
TX packets:3933 errors:271 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:195
RX bytes:856392 (836.3 KiB) TX bytes:344114 (336.0 KiB)
Interrupt:6
and on the client:
ath0 Link encap:Ethernet HWaddr 00:0E:8E:18:F7:AE
inet addr:10.130.1.3 Bcast:10.130.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3805 errors:0 dropped:7 overruns:0 frame:0
TX packets:1236 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:192820 (188.3 KiB) TX bytes:83458 (81.5 KiB)
eth0 Link encap:Ethernet HWaddr 00:1A:92:7E:27:71
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4205 errors:0 dropped:0 overruns:0 frame:0
TX packets:3622 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:337594 (329.6 KiB) TX bytes:360497 (352.0 KiB)
Interrupt:4
eth0.0 Link encap:Ethernet HWaddr 00:1A:92:7E:27:71
inet addr:192.168.4.1 Bcast:192.168.4.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4200 errors:0 dropped:0 overruns:0 frame:0
TX packets:3620 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:261741 (255.6 KiB) TX bytes:335861 (327.9 KiB)
gate0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:169.254.0.1 P-t-P:169.254.0.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1471 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:15 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:0 (0.0 B) TX bytes:1260 (1.2 KiB)
gate1 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:169.254.0.1 P-t-P:169.254.0.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1471 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:34 errors:0 dropped:0 overruns:0 frame:0
TX packets:34 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2164 (2.1 KiB) TX bytes:2164 (2.1 KiB)
wifi0 Link encap:UNSPEC HWaddr
00-0E-8E-18-F7-AE-00-00-00-00-00-00-00-00-00-00
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:43355 errors:0 dropped:0 overruns:0 frame:801
TX packets:1938 errors:333 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:195
RX bytes:4590804 (4.3 MiB) TX bytes:175638 (171.5 KiB)
Interrupt:6
And route -n showed:
on the gateway:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
10.130.1.0 0.0.0.0 255.255.255.0 U 0 0 0 ath0
192.168.3.0 0.0.0.0 255.255.255.0 U 0 0 0
eth0.0
192.168.2.0 0.0.0.0 255.255.255.0 U 0 0 0
eth0.1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0
gate0
0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0
eth0.1
and on the client:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
192.168.4.0 0.0.0.0 255.255.255.0 U 0 0 0
eth0.0
10.130.1.0 0.0.0.0 255.255.255.0 U 0 0 0 ath0
0.0.0.0 10.130.1.1 0.0.0.0 UG 0 0 0 ath0
I added also a registration to iptable (on the gateway and on the client
the same)
iptables -t nat -I POSTROUTING -o gate0 -j MASQUERADE
So, nodes can see each other, and the gateway is broadcasting (client
can see it).
I can ping from gateway to client by tunnel -> ping 169.254.0.0 but I
can`t ping from client to gateway -> ping 169.254.0.0 , what`s wrong?
Unfortunately, I can`t get internet too.
Can somebody help me? I suppose there is a small mistake, as always but
I have recently started my adventures with Open Wrt so I don`t
understand everything and it can be my mistake.
Thanks in Advance,
Krzysiek (student).
-------------------------------------------------
Ustaw Interie jako strone startowa!
Zobacz jak to zrobic >> http://linkint.pl/f297e
9 years, 9 months
- 3
- 6
[B.A.T.M.A.N.] [PATCH] batman-adv: Make bat_priv->primary_if an rcu protected pointer
by Marek Lindner
The rcu protected macros rcu_dereference() and rcu_assign_pointer()
for the bat_priv->primary_if need to be used, as well as spin/rcu locking.
Otherwise we might end up using a primary_if pointer pointing to already
freed memory.
Signed-off-by: Marek Lindner <lindner_marek(a)yahoo.de>
---
gateway_client.c | 33 ++++++++++-------
hard-interface.c | 100 +++++++++++++++++++++++++++++++++++++-------------
hard-interface.h | 1 +
icmp_socket.c | 19 +++++++---
originator.c | 34 +++++++++++-------
routing.c | 18 ++++++---
send.c | 17 +++++++--
soft-interface.c | 57 +++++++++++++++++++----------
translation-table.c | 57 ++++++++++++++++++++++-------
types.h | 2 +-
unicast.c | 16 ++++++---
vis.c | 37 +++++++++++++------
12 files changed, 273 insertions(+), 118 deletions(-)
diff --git a/gateway_client.c b/gateway_client.c
index 2acd7a6..c394154 100644
--- a/gateway_client.c
+++ b/gateway_client.c
@@ -435,30 +435,32 @@ int gw_client_seq_print_text(struct seq_file *seq, void *offset)
{
struct net_device *net_dev = (struct net_device *)seq->private;
struct bat_priv *bat_priv = netdev_priv(net_dev);
+ struct hard_iface *primary_if;
struct gw_node *gw_node;
struct hlist_node *node;
- int gw_count = 0;
+ int gw_count = 0, ret = 0;
- if (!bat_priv->primary_if) {
-
- return seq_printf(seq, "BATMAN mesh %s disabled - please "
- "specify interfaces to enable it\n",
- net_dev->name);
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if) {
+ ret = seq_printf(seq, "BATMAN mesh %s disabled - please "
+ "specify interfaces to enable it\n",
+ net_dev->name);
+ goto out;
}
- if (bat_priv->primary_if->if_status != IF_ACTIVE) {
-
- return seq_printf(seq, "BATMAN mesh %s disabled - "
- "primary interface not active\n",
- net_dev->name);
+ if (primary_if->if_status != IF_ACTIVE) {
+ ret = seq_printf(seq, "BATMAN mesh %s disabled - "
+ "primary interface not active\n",
+ net_dev->name);
+ goto out;
}
seq_printf(seq, " %-12s (%s/%i) %17s [%10s]: gw_class ... "
"[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%pM (%s)]\n",
"Gateway", "#", TQ_MAX_VALUE, "Nexthop",
"outgoingIF", SOURCE_VERSION, REVISION_VERSION_STR,
- bat_priv->primary_if->net_dev->name,
- bat_priv->primary_if->net_dev->dev_addr, net_dev->name);
+ primary_if->net_dev->name,
+ primary_if->net_dev->dev_addr, net_dev->name);
rcu_read_lock();
hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
@@ -476,7 +478,10 @@ int gw_client_seq_print_text(struct seq_file *seq, void *offset)
if (gw_count == 0)
seq_printf(seq, "No gateways in range ...\n");
- return 0;
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ return ret;
}
int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb)
diff --git a/hard-interface.c b/hard-interface.c
index b3058e4..158d127 100644
--- a/hard-interface.c
+++ b/hard-interface.c
@@ -110,47 +110,77 @@ out:
return hard_iface;
}
-static void update_primary_addr(struct bat_priv *bat_priv)
+static void primary_if_update_addr(struct bat_priv *bat_priv)
{
struct vis_packet *vis_packet;
+ struct hard_iface *primary_if;
+
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
vis_packet = (struct vis_packet *)
bat_priv->my_vis_info->skb_packet->data;
- memcpy(vis_packet->vis_orig,
- bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(vis_packet->vis_orig, primary_if->net_dev->dev_addr, ETH_ALEN);
memcpy(vis_packet->sender_orig,
- bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ primary_if->net_dev->dev_addr, ETH_ALEN);
+
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
}
-static void set_primary_if(struct bat_priv *bat_priv,
- struct hard_iface *hard_iface)
+struct hard_iface *primary_if_get_selected(struct bat_priv *bat_priv)
{
- struct batman_packet *batman_packet;
- struct hard_iface *old_if;
+ struct hard_iface *hard_iface;
- if (hard_iface && !atomic_inc_not_zero(&hard_iface->refcount))
+ rcu_read_lock();
+ hard_iface = rcu_dereference(bat_priv->primary_if);
+ if (!hard_iface)
+ goto out;
+
+ if (!atomic_inc_not_zero(&hard_iface->refcount))
hard_iface = NULL;
- old_if = bat_priv->primary_if;
- bat_priv->primary_if = hard_iface;
+out:
+ rcu_read_unlock();
+ return hard_iface;
+}
- if (old_if)
- hardif_free_ref(old_if);
+static void primary_if_select(struct bat_priv *bat_priv,
+ struct hard_iface *new_hard_iface)
+{
+ struct hard_iface *curr_hard_iface;
+ struct batman_packet *batman_packet;
- if (!bat_priv->primary_if)
- return;
+ spin_lock_bh(&hardif_list_lock);
- batman_packet = (struct batman_packet *)(hard_iface->packet_buff);
+ if (new_hard_iface && !atomic_inc_not_zero(&new_hard_iface->refcount))
+ new_hard_iface = NULL;
+
+ curr_hard_iface = bat_priv->primary_if;
+ rcu_assign_pointer(bat_priv->primary_if, new_hard_iface);
+
+ if (curr_hard_iface)
+ hardif_free_ref(curr_hard_iface);
+
+ if (!new_hard_iface)
+ goto out;
+
+ batman_packet = (struct batman_packet *)(new_hard_iface->packet_buff);
batman_packet->flags = PRIMARIES_FIRST_HOP;
batman_packet->ttl = TTL;
- update_primary_addr(bat_priv);
+ primary_if_update_addr(bat_priv);
/***
* hacky trick to make sure that we send the HNA information via
* our new primary interface
*/
atomic_set(&bat_priv->hna_local_changed, 1);
+
+out:
+ spin_unlock_bh(&hardif_list_lock);
}
static bool hardif_is_iface_up(struct hard_iface *hard_iface)
@@ -236,9 +266,10 @@ void update_min_mtu(struct net_device *soft_iface)
static void hardif_activate_interface(struct hard_iface *hard_iface)
{
struct bat_priv *bat_priv;
+ struct hard_iface *primary_if = NULL;
if (hard_iface->if_status != IF_INACTIVE)
- return;
+ goto out;
bat_priv = netdev_priv(hard_iface->soft_iface);
@@ -249,14 +280,18 @@ static void hardif_activate_interface(struct hard_iface *hard_iface)
* the first active interface becomes our primary interface or
* the next active interface after the old primay interface was removed
*/
- if (!bat_priv->primary_if)
- set_primary_if(bat_priv, hard_iface);
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ primary_if_select(bat_priv, hard_iface);
bat_info(hard_iface->soft_iface, "Interface activated: %s\n",
hard_iface->net_dev->name);
update_min_mtu(hard_iface->soft_iface);
- return;
+
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
}
static void hardif_deactivate_interface(struct hard_iface *hard_iface)
@@ -386,12 +421,13 @@ err:
void hardif_disable_interface(struct hard_iface *hard_iface)
{
struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
+ struct hard_iface *primary_if = NULL;
if (hard_iface->if_status == IF_ACTIVE)
hardif_deactivate_interface(hard_iface);
if (hard_iface->if_status != IF_INACTIVE)
- return;
+ goto out;
bat_info(hard_iface->soft_iface, "Removing interface: %s\n",
hard_iface->net_dev->name);
@@ -400,11 +436,12 @@ void hardif_disable_interface(struct hard_iface *hard_iface)
bat_priv->num_ifaces--;
orig_hash_del_if(hard_iface, bat_priv->num_ifaces);
- if (hard_iface == bat_priv->primary_if) {
+ primary_if = primary_if_get_selected(bat_priv);
+ if (hard_iface == primary_if) {
struct hard_iface *new_if;
new_if = hardif_get_active(hard_iface->soft_iface);
- set_primary_if(bat_priv, new_if);
+ primary_if_select(bat_priv, new_if);
if (new_if)
hardif_free_ref(new_if);
@@ -425,6 +462,10 @@ void hardif_disable_interface(struct hard_iface *hard_iface)
hard_iface->soft_iface = NULL;
hardif_free_ref(hard_iface);
+
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
}
static struct hard_iface *hardif_add_interface(struct net_device *net_dev)
@@ -514,6 +555,7 @@ static int hard_if_event(struct notifier_block *this,
{
struct net_device *net_dev = (struct net_device *)ptr;
struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
+ struct hard_iface *primary_if = NULL;
struct bat_priv *bat_priv;
if (!hard_iface && event == NETDEV_REGISTER)
@@ -549,8 +591,12 @@ static int hard_if_event(struct notifier_block *this,
update_mac_addresses(hard_iface);
bat_priv = netdev_priv(hard_iface->soft_iface);
- if (hard_iface == bat_priv->primary_if)
- update_primary_addr(bat_priv);
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto hardif_put;
+
+ if (hard_iface == primary_if)
+ primary_if_update_addr(bat_priv);
break;
default:
break;
@@ -559,6 +605,8 @@ static int hard_if_event(struct notifier_block *this,
hardif_put:
hardif_free_ref(hard_iface);
out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
return NOTIFY_DONE;
}
diff --git a/hard-interface.h b/hard-interface.h
index a9ddf36..d5f6351 100644
--- a/hard-interface.h
+++ b/hard-interface.h
@@ -38,6 +38,7 @@ void hardif_remove_interfaces(void);
int hardif_min_mtu(struct net_device *soft_iface);
void update_min_mtu(struct net_device *soft_iface);
void hardif_free_rcu(struct rcu_head *rcu);
+struct hard_iface *primary_if_get_selected(struct bat_priv *bat_priv);
static inline void hardif_free_ref(struct hard_iface *hard_iface)
{
diff --git a/icmp_socket.c b/icmp_socket.c
index 49079c2..fa22ba2 100644
--- a/icmp_socket.c
+++ b/icmp_socket.c
@@ -153,6 +153,7 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
{
struct socket_client *socket_client = file->private_data;
struct bat_priv *bat_priv = socket_client->bat_priv;
+ struct hard_iface *primary_if = NULL;
struct sk_buff *skb;
struct icmp_packet_rr *icmp_packet;
@@ -167,15 +168,21 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
return -EINVAL;
}
- if (!bat_priv->primary_if)
- return -EFAULT;
+ primary_if = primary_if_get_selected(bat_priv);
+
+ if (!primary_if) {
+ len = -EFAULT;
+ goto out;
+ }
if (len >= sizeof(struct icmp_packet_rr))
packet_len = sizeof(struct icmp_packet_rr);
skb = dev_alloc_skb(packet_len + sizeof(struct ethhdr));
- if (!skb)
- return -ENOMEM;
+ if (!skb) {
+ len = -ENOMEM;
+ goto out;
+ }
skb_reserve(skb, sizeof(struct ethhdr));
icmp_packet = (struct icmp_packet_rr *)skb_put(skb, packet_len);
@@ -233,7 +240,7 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
goto dst_unreach;
memcpy(icmp_packet->orig,
- bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ primary_if->net_dev->dev_addr, ETH_ALEN);
if (packet_len == sizeof(struct icmp_packet_rr))
memcpy(icmp_packet->rr,
@@ -248,6 +255,8 @@ dst_unreach:
free_skb:
kfree_skb(skb);
out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
if (neigh_node)
neigh_node_free_ref(neigh_node);
if (orig_node)
diff --git a/originator.c b/originator.c
index 5b8fe32..ef4a9be 100644
--- a/originator.c
+++ b/originator.c
@@ -405,29 +405,34 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
struct hashtable_t *hash = bat_priv->orig_hash;
struct hlist_node *node, *node_tmp;
struct hlist_head *head;
+ struct hard_iface *primary_if;
struct orig_node *orig_node;
struct neigh_node *neigh_node, *neigh_node_tmp;
int batman_count = 0;
int last_seen_secs;
int last_seen_msecs;
- int i;
+ int i, ret = 0;
- if ((!bat_priv->primary_if) ||
- (bat_priv->primary_if->if_status != IF_ACTIVE)) {
- if (!bat_priv->primary_if)
- return seq_printf(seq, "BATMAN mesh %s disabled - "
- "please specify interfaces to enable it\n",
- net_dev->name);
+ primary_if = primary_if_get_selected(bat_priv);
- return seq_printf(seq, "BATMAN mesh %s "
- "disabled - primary interface not active\n",
- net_dev->name);
+ if (!primary_if) {
+ ret = seq_printf(seq, "BATMAN mesh %s disabled - "
+ "please specify interfaces to enable it\n",
+ net_dev->name);
+ goto out;
+ }
+
+ if (primary_if->if_status != IF_ACTIVE) {
+ ret = seq_printf(seq, "BATMAN mesh %s "
+ "disabled - primary interface not active\n",
+ net_dev->name);
+ goto out;
}
seq_printf(seq, "[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%pM (%s)]\n",
SOURCE_VERSION, REVISION_VERSION_STR,
- bat_priv->primary_if->net_dev->name,
- bat_priv->primary_if->net_dev->dev_addr, net_dev->name);
+ 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", "#", TQ_MAX_VALUE, "Nexthop",
"outgoingIF", "Potential nexthops");
@@ -474,7 +479,10 @@ next:
if (batman_count == 0)
seq_printf(seq, "No batman nodes in range ...\n");
- return 0;
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ return ret;
}
static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)
diff --git a/routing.c b/routing.c
index 2d77bd3..49f5715 100644
--- a/routing.c
+++ b/routing.c
@@ -904,6 +904,7 @@ int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
static int recv_my_icmp_packet(struct bat_priv *bat_priv,
struct sk_buff *skb, size_t icmp_len)
{
+ struct hard_iface *primary_if = NULL;
struct orig_node *orig_node = NULL;
struct neigh_node *router = NULL;
struct icmp_packet_rr *icmp_packet;
@@ -917,7 +918,8 @@ static int recv_my_icmp_packet(struct bat_priv *bat_priv,
goto out;
}
- if (!bat_priv->primary_if)
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
goto out;
/* answer echo request (ping) */
@@ -937,8 +939,7 @@ static int recv_my_icmp_packet(struct bat_priv *bat_priv,
icmp_packet = (struct icmp_packet_rr *)skb->data;
memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
- memcpy(icmp_packet->orig,
- bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(icmp_packet->orig, primary_if->net_dev->dev_addr, ETH_ALEN);
icmp_packet->msg_type = ECHO_REPLY;
icmp_packet->ttl = TTL;
@@ -946,6 +947,8 @@ static int recv_my_icmp_packet(struct bat_priv *bat_priv,
ret = NET_RX_SUCCESS;
out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
if (router)
neigh_node_free_ref(router);
if (orig_node)
@@ -956,6 +959,7 @@ out:
static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
struct sk_buff *skb)
{
+ struct hard_iface *primary_if = NULL;
struct orig_node *orig_node = NULL;
struct neigh_node *router = NULL;
struct icmp_packet *icmp_packet;
@@ -971,7 +975,8 @@ static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
goto out;
}
- if (!bat_priv->primary_if)
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
goto out;
/* get routing information */
@@ -990,8 +995,7 @@ static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
icmp_packet = (struct icmp_packet *)skb->data;
memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
- memcpy(icmp_packet->orig,
- bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(icmp_packet->orig, primary_if->net_dev->dev_addr, ETH_ALEN);
icmp_packet->msg_type = TTL_EXCEEDED;
icmp_packet->ttl = TTL;
@@ -999,6 +1003,8 @@ static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
ret = NET_RX_SUCCESS;
out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
if (router)
neigh_node_free_ref(router);
if (orig_node)
diff --git a/send.c b/send.c
index 7650e2b..02b541a 100644
--- a/send.c
+++ b/send.c
@@ -244,6 +244,7 @@ static void rebuild_batman_packet(struct bat_priv *bat_priv,
void schedule_own_packet(struct hard_iface *hard_iface)
{
struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
+ struct hard_iface *primary_if;
unsigned long send_time;
struct batman_packet *batman_packet;
int vis_server;
@@ -253,6 +254,7 @@ void schedule_own_packet(struct hard_iface *hard_iface)
return;
vis_server = atomic_read(&bat_priv->vis_mode);
+ primary_if = primary_if_get_selected(bat_priv);
/**
* the interface gets activated here to avoid race conditions between
@@ -266,7 +268,7 @@ void schedule_own_packet(struct hard_iface *hard_iface)
/* if local hna has changed and interface is a primary interface */
if ((atomic_read(&bat_priv->hna_local_changed)) &&
- (hard_iface == bat_priv->primary_if))
+ (hard_iface == primary_if))
rebuild_batman_packet(bat_priv, hard_iface);
/**
@@ -284,7 +286,7 @@ void schedule_own_packet(struct hard_iface *hard_iface)
else
batman_packet->flags &= ~VIS_SERVER;
- if ((hard_iface == bat_priv->primary_if) &&
+ if ((hard_iface == primary_if) &&
(atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER))
batman_packet->gw_flags =
(uint8_t)atomic_read(&bat_priv->gw_bandwidth);
@@ -299,6 +301,9 @@ void schedule_own_packet(struct hard_iface *hard_iface)
hard_iface->packet_buff,
hard_iface->packet_len,
hard_iface, 1, send_time);
+
+ if (primary_if)
+ hardif_free_ref(primary_if);
}
void schedule_forward_packet(struct orig_node *orig_node,
@@ -403,6 +408,7 @@ static void _add_bcast_packet_to_list(struct bat_priv *bat_priv,
* skb is freed. */
int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb)
{
+ struct hard_iface *primary_if = NULL;
struct forw_packet *forw_packet;
struct bcast_packet *bcast_packet;
@@ -411,7 +417,8 @@ int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb)
goto out;
}
- if (!bat_priv->primary_if)
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
goto out;
forw_packet = kmalloc(sizeof(struct forw_packet), GFP_ATOMIC);
@@ -430,7 +437,7 @@ int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb)
skb_reset_mac_header(skb);
forw_packet->skb = skb;
- forw_packet->if_incoming = bat_priv->primary_if;
+ forw_packet->if_incoming = primary_if;
/* how often did we send the bcast packet ? */
forw_packet->num_packets = 0;
@@ -443,6 +450,8 @@ packet_free:
out_and_inc:
atomic_inc(&bat_priv->bcast_queue_left);
out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
return NETDEV_TX_BUSY;
}
diff --git a/soft-interface.c b/soft-interface.c
index f4d80ad..0b12e8b 100644
--- a/soft-interface.c
+++ b/soft-interface.c
@@ -211,13 +211,17 @@ int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
struct net_device *net_dev = (struct net_device *)seq->private;
struct bat_priv *bat_priv = netdev_priv(net_dev);
struct softif_neigh *softif_neigh;
+ struct hard_iface *primary_if;
struct hlist_node *node;
struct softif_neigh *curr_softif_neigh;
+ int ret = 0;
- if (!bat_priv->primary_if) {
- return seq_printf(seq, "BATMAN mesh %s disabled - "
- "please specify interfaces to enable it\n",
- net_dev->name);
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if) {
+ ret = seq_printf(seq, "BATMAN mesh %s disabled - "
+ "please specify interfaces to enable it\n",
+ net_dev->name);
+ goto out;
}
seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
@@ -234,7 +238,10 @@ int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
if (curr_softif_neigh)
softif_neigh_free_ref(curr_softif_neigh);
- return 0;
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ return ret;
}
static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
@@ -243,7 +250,8 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
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;
+ struct softif_neigh *softif_neigh = NULL;
+ struct hard_iface *primary_if = NULL;
struct softif_neigh *curr_softif_neigh = NULL;
if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
@@ -253,28 +261,34 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
if (batman_packet->version != COMPAT_VERSION)
- goto err;
+ goto out;
if (batman_packet->packet_type != BAT_PACKET)
- goto err;
+ goto out;
if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
- goto err;
+ goto out;
if (is_my_mac(batman_packet->orig))
- goto err;
+ goto out;
softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
-
if (!softif_neigh)
- goto err;
+ goto out;
curr_softif_neigh = softif_neigh_get_selected(bat_priv);
+ if (!curr_softif_neigh)
+ goto out;
+
if (curr_softif_neigh == softif_neigh)
goto out;
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
+
/* we got a neighbor but its mac is 'bigger' than ours */
- if (memcmp(bat_priv->primary_if->net_dev->dev_addr,
+ if (memcmp(primary_if->net_dev->dev_addr,
softif_neigh->addr, ETH_ALEN) < 0)
goto out;
@@ -296,7 +310,7 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
/* close own batX device and use softif_neigh as exit node */
if ((!curr_softif_neigh) &&
(memcmp(softif_neigh->addr,
- bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
+ 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);
@@ -306,12 +320,13 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
}
out:
- softif_neigh_free_ref(softif_neigh);
-err:
kfree_skb(skb);
+ if (softif_neigh)
+ softif_neigh_free_ref(softif_neigh);
if (curr_softif_neigh)
softif_neigh_free_ref(curr_softif_neigh);
-
+ if (primary_if)
+ hardif_free_ref(primary_if);
return;
}
@@ -367,6 +382,7 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
{
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct bat_priv *bat_priv = netdev_priv(soft_iface);
+ struct hard_iface *primary_if = NULL;
struct bcast_packet *bcast_packet;
struct vlan_ethhdr *vhdr;
struct softif_neigh *curr_softif_neigh = NULL;
@@ -416,7 +432,8 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
/* ethernet packet should be broadcasted */
if (do_bcast) {
- if (!bat_priv->primary_if)
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
goto dropped;
if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0)
@@ -432,7 +449,7 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
/* hw address of first interface is the orig mac because only
* this mac is known throughout the mesh */
memcpy(bcast_packet->orig,
- bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ primary_if->net_dev->dev_addr, ETH_ALEN);
/* set broadcast sequence number */
bcast_packet->seqno =
@@ -462,6 +479,8 @@ dropped_freed:
end:
if (curr_softif_neigh)
softif_neigh_free_ref(curr_softif_neigh);
+ if (primary_if)
+ hardif_free_ref(primary_if);
return NETDEV_TX_OK;
}
diff --git a/translation-table.c b/translation-table.c
index 8d15b48..f931830 100644
--- a/translation-table.c
+++ b/translation-table.c
@@ -22,6 +22,7 @@
#include "main.h"
#include "translation-table.h"
#include "soft-interface.h"
+#include "hard-interface.h"
#include "hash.h"
#include "originator.h"
@@ -237,16 +238,26 @@ int hna_local_seq_print_text(struct seq_file *seq, void *offset)
struct bat_priv *bat_priv = netdev_priv(net_dev);
struct hashtable_t *hash = bat_priv->hna_local_hash;
struct hna_local_entry *hna_local_entry;
+ struct hard_iface *primary_if;
struct hlist_node *node;
struct hlist_head *head;
size_t buf_size, pos;
char *buff;
- int i;
+ int i, ret = 0;
- if (!bat_priv->primary_if) {
- return seq_printf(seq, "BATMAN mesh %s disabled - "
- "please specify interfaces to enable it\n",
- net_dev->name);
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if) {
+ ret = seq_printf(seq, "BATMAN mesh %s disabled - "
+ "please specify interfaces to enable it\n",
+ net_dev->name);
+ goto out;
+ }
+
+ if (primary_if->if_status != IF_ACTIVE) {
+ ret = seq_printf(seq, "BATMAN mesh %s disabled - "
+ "primary interface not active\n",
+ net_dev->name);
+ goto out;
}
seq_printf(seq, "Locally retrieved addresses (from %s) "
@@ -269,7 +280,8 @@ int hna_local_seq_print_text(struct seq_file *seq, void *offset)
buff = kmalloc(buf_size, GFP_ATOMIC);
if (!buff) {
spin_unlock_bh(&bat_priv->hna_lhash_lock);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out;
}
buff[0] = '\0';
@@ -291,7 +303,10 @@ int hna_local_seq_print_text(struct seq_file *seq, void *offset)
seq_printf(seq, "%s", buff);
kfree(buff);
- return 0;
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ return ret;
}
static void _hna_local_del(struct hlist_node *node, void *arg)
@@ -468,16 +483,26 @@ int hna_global_seq_print_text(struct seq_file *seq, void *offset)
struct bat_priv *bat_priv = netdev_priv(net_dev);
struct hashtable_t *hash = bat_priv->hna_global_hash;
struct hna_global_entry *hna_global_entry;
+ struct hard_iface *primary_if;
struct hlist_node *node;
struct hlist_head *head;
size_t buf_size, pos;
char *buff;
- int i;
+ int i, ret = 0;
- if (!bat_priv->primary_if) {
- return seq_printf(seq, "BATMAN mesh %s disabled - "
- "please specify interfaces to enable it\n",
- net_dev->name);
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if) {
+ ret = seq_printf(seq, "BATMAN mesh %s disabled - please "
+ "specify interfaces to enable it\n",
+ net_dev->name);
+ goto out;
+ }
+
+ if (primary_if->if_status != IF_ACTIVE) {
+ ret = seq_printf(seq, "BATMAN mesh %s disabled - "
+ "primary interface not active\n",
+ net_dev->name);
+ goto out;
}
seq_printf(seq, "Globally announced HNAs received via the mesh %s\n",
@@ -499,7 +524,8 @@ int hna_global_seq_print_text(struct seq_file *seq, void *offset)
buff = kmalloc(buf_size, GFP_ATOMIC);
if (!buff) {
spin_unlock_bh(&bat_priv->hna_ghash_lock);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out;
}
buff[0] = '\0';
pos = 0;
@@ -522,7 +548,10 @@ int hna_global_seq_print_text(struct seq_file *seq, void *offset)
seq_printf(seq, "%s", buff);
kfree(buff);
- return 0;
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ return ret;
}
static void _hna_global_del_orig(struct bat_priv *bat_priv,
diff --git a/types.h b/types.h
index 75123b1..f849f9b 100644
--- a/types.h
+++ b/types.h
@@ -149,7 +149,7 @@ struct bat_priv {
struct hlist_head softif_neigh_list;
struct softif_neigh __rcu *softif_neigh;
struct debug_log *debug_log;
- struct hard_iface *primary_if;
+ struct hard_iface __rcu *primary_if;
struct kobject *mesh_obj;
struct dentry *debug_dir;
struct hlist_head forw_bat_list;
diff --git a/unicast.c b/unicast.c
index d46acc8..b46cbf1 100644
--- a/unicast.c
+++ b/unicast.c
@@ -221,15 +221,17 @@ int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
struct hard_iface *hard_iface, uint8_t dstaddr[])
{
struct unicast_packet tmp_uc, *unicast_packet;
+ struct hard_iface *primary_if;
struct sk_buff *frag_skb;
struct unicast_frag_packet *frag1, *frag2;
int uc_hdr_len = sizeof(struct unicast_packet);
int ucf_hdr_len = sizeof(struct unicast_frag_packet);
int data_len = skb->len - uc_hdr_len;
- int large_tail = 0;
+ int large_tail = 0, ret = NET_RX_DROP;
uint16_t seqno;
- if (!bat_priv->primary_if)
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
goto dropped;
frag_skb = dev_alloc_skb(data_len - (data_len / 2) + ucf_hdr_len);
@@ -254,7 +256,7 @@ int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
frag1->version = COMPAT_VERSION;
frag1->packet_type = BAT_UNICAST_FRAG;
- memcpy(frag1->orig, bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(frag1->orig, primary_if->net_dev->dev_addr, ETH_ALEN);
memcpy(frag2, frag1, sizeof(struct unicast_frag_packet));
if (data_len & 1)
@@ -269,13 +271,17 @@ int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
send_skb_packet(skb, hard_iface, dstaddr);
send_skb_packet(frag_skb, hard_iface, dstaddr);
- return NET_RX_SUCCESS;
+ ret = NET_RX_SUCCESS;
+ goto out;
drop_frag:
kfree_skb(frag_skb);
dropped:
kfree_skb(skb);
- return NET_RX_DROP;
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ return ret;
}
int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
diff --git a/vis.c b/vis.c
index d4cc4f5..c8f571d 100644
--- a/vis.c
+++ b/vis.c
@@ -204,6 +204,7 @@ static ssize_t vis_data_read_entry(char *buff, struct vis_info_entry *entry,
int vis_seq_print_text(struct seq_file *seq, void *offset)
{
+ struct hard_iface *primary_if;
struct hlist_node *node;
struct hlist_head *head;
struct vis_info *info;
@@ -215,15 +216,18 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
HLIST_HEAD(vis_if_list);
struct if_list_entry *entry;
struct hlist_node *pos, *n;
- int i, j;
+ int i, j, ret = 0;
int vis_server = atomic_read(&bat_priv->vis_mode);
size_t buff_pos, buf_size;
char *buff;
int compare;
- if ((!bat_priv->primary_if) ||
- (vis_server == VIS_TYPE_CLIENT_UPDATE))
- return 0;
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
+
+ if (vis_server == VIS_TYPE_CLIENT_UPDATE)
+ goto out;
buf_size = 1;
/* Estimate length */
@@ -270,7 +274,8 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
buff = kmalloc(buf_size, GFP_ATOMIC);
if (!buff) {
spin_unlock_bh(&bat_priv->vis_hash_lock);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out;
}
buff[0] = '\0';
buff_pos = 0;
@@ -328,7 +333,10 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
seq_printf(seq, "%s", buff);
kfree(buff);
- return 0;
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
+ return ret;
}
/* add the info packet to the send list, if it was not
@@ -815,16 +823,20 @@ out:
/* only send one vis packet. called from send_vis_packets() */
static void send_vis_packet(struct bat_priv *bat_priv, struct vis_info *info)
{
+ struct hard_iface *primary_if;
struct vis_packet *packet;
+ primary_if = primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
+
packet = (struct vis_packet *)info->skb_packet->data;
if (packet->ttl < 2) {
pr_debug("Error - can't send vis packet: ttl exceeded\n");
- return;
+ goto out;
}
- memcpy(packet->sender_orig, bat_priv->primary_if->net_dev->dev_addr,
- ETH_ALEN);
+ memcpy(packet->sender_orig, primary_if->net_dev->dev_addr, ETH_ALEN);
packet->ttl--;
if (is_broadcast_ether_addr(packet->target_orig))
@@ -832,6 +844,10 @@ static void send_vis_packet(struct bat_priv *bat_priv, struct vis_info *info)
else
unicast_vis_packet(bat_priv, info);
packet->ttl++; /* restore TTL */
+
+out:
+ if (primary_if)
+ hardif_free_ref(primary_if);
}
/* called from timer; send (and maybe generate) vis packet. */
@@ -858,8 +874,7 @@ static void send_vis_packets(struct work_struct *work)
kref_get(&info->refcount);
spin_unlock_bh(&bat_priv->vis_hash_lock);
- if (bat_priv->primary_if)
- send_vis_packet(bat_priv, info);
+ send_vis_packet(bat_priv, info);
spin_lock_bh(&bat_priv->vis_hash_lock);
send_list_del(info);
--
1.7.2.3
9 years, 9 months
- 1
- 1
[B.A.T.M.A.N.] [PATCH] batman-adv: gw_node_update() now adds a new gw_node if no curr_gw is selected
by Antonio Quartulli
gw_node_update() doesn't add a new gw_node in case of empty curr_gw.
This means that at the beginning no gw_node is added, leading to an
empty gateway list.
Signed-off-by: Antonio Quartulli <ordex(a)autistici.org>
---
gateway_client.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/gateway_client.c b/gateway_client.c
index 2acd7a6..db4468c 100644
--- a/gateway_client.c
+++ b/gateway_client.c
@@ -311,10 +311,10 @@ void gw_node_update(struct bat_priv *bat_priv,
struct gw_node *gw_node, *curr_gw;
curr_gw = gw_get_selected_gw_node(bat_priv);
+ rcu_read_lock();
if (!curr_gw)
- goto out;
+ goto gw_node_add;
- rcu_read_lock();
hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
if (gw_node->orig_node != orig_node)
continue;
@@ -340,6 +340,7 @@ void gw_node_update(struct bat_priv *bat_priv,
goto unlock;
}
+gw_node_add:
if (new_gwflags == 0)
goto unlock;
@@ -350,7 +351,7 @@ deselect:
gw_deselect(bat_priv);
unlock:
rcu_read_unlock();
-out:
+
if (curr_gw)
gw_node_free_ref(curr_gw);
}
--
1.7.3.4
9 years, 9 months
- 2
- 4
[B.A.T.M.A.N.] [PATCH] batctl: Fix JSON object output
by Sven Eckelmann
Each line is a single JSON object and has to start with '{' and no
spaces are allowed before it. Each pair has to be identified with a
string in double quotes.
Signed-off-by: Sven Eckelmann <sven(a)narfation.org>
---
vis.c | 14 +++++++-------
1 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/vis.c b/vis.c
index eb77872..adb12d0 100644
--- a/vis.c
+++ b/vis.c
@@ -126,33 +126,33 @@ static void json_print_tq(char *orig, char *from, const long tq)
int int_part = TQ_MAX_VALUE / tq;
int frac_part = (1000 * TQ_MAX_VALUE / tq) - (int_part * 1000);
- printf("\t{ router : \"%s\", ",
+ printf("{ \"router\" : \"%s\", ",
get_name_by_macstr(orig, (with_names ? USE_BAT_HOSTS : 0)));
- printf("neighbor : \"%s\", label : \"%d.%03d\" }\n",
+ printf("\"neighbor\" : \"%s\", \"label\" : \"%d.%03d\" }\n",
get_name_by_macstr(from, (with_names ? USE_BAT_HOSTS : 0)),
int_part, frac_part);
}
static void json_print_HNA(char *orig, char *from)
{
- printf("\t{ router : \"%s\", ",
+ printf("{ \"router\" : \"%s\", ",
get_name_by_macstr(orig, (with_names ? USE_BAT_HOSTS : 0)));
- printf("gateway : \"%s\", label : \"HNA\" }\n",
+ printf("\"gateway\" : \"%s\", \"label\" : \"HNA\" }\n",
get_name_by_macstr(from, (with_names ? USE_BAT_HOSTS : 0)));
}
static void json_print_1st(char *orig)
{
- printf("\t{ primary : \"%s\" }\n",
+ printf("{ \"primary\" : \"%s\" }\n",
get_name_by_macstr(orig, (with_names ? USE_BAT_HOSTS : 0)));
}
static void json_print_2nd(char *orig, char *from)
{
- printf("\t{ secondary : \"%s\", ",
+ printf("{ \"secondary\" : \"%s\", ",
get_name_by_macstr(from, (with_names ? USE_BAT_HOSTS : 0)));
- printf("of : \"%s\" }\n",
+ printf("\"of\" : \"%s\" }\n",
get_name_by_macstr(orig, (with_names ? USE_BAT_HOSTS : 0)));
}
--
1.7.4.4
9 years, 9 months
- 2
- 1
[B.A.T.M.A.N.] smallest embedded hw running b.a.t.m.a.n ?
by f campos
Hi !
Can the forum give feedback on the smallest embedded hw running b.a.t.m.a.n ?
do you have digikey/stores link for that ?
Filipe
9 years, 9 months
- 3
- 2