#include "routing.h"
#include "bridge_loop_avoidance.h"
-#include <linux/crc16.h>
+#include <linux/crc32c.h>
/* hash class keys */
static struct lock_class_key batadv_tt_local_hash_lock_class_key;
static struct lock_class_key batadv_tt_global_hash_lock_class_key;
static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client,
+ unsigned short vid,
struct batadv_orig_node *orig_node);
static void batadv_tt_purge(struct work_struct *work);
static void
static void batadv_tt_global_del(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
const unsigned char *addr,
- const char *message, bool roaming);
+ unsigned short vid, const char *message,
+ bool roaming);
/* returns 1 if they are the same mac addr */
static int batadv_compare_tt(const struct hlist_node *node, const void *data2)
return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
}
+/**
+ * batadv_choose_tt - return the index of the tt entry in the hash table
+ * @data: pointer to the tt_common_entry object to map
+ * @size: the size of the hash table
+ *
+ * Returns the hash index where the object represented by 'data' should be
+ * stored at.
+ */
+static inline uint32_t batadv_choose_tt(const void *data, uint32_t size)
+{
+ struct batadv_tt_common_entry *tt;
+ uint32_t hash = 0;
+
+ tt = (struct batadv_tt_common_entry *)data;
+ hash = batadv_hash_bytes(hash, &tt->addr, ETH_ALEN);
+ hash = batadv_hash_bytes(hash, &tt->vid, sizeof(tt->vid));
+
+ hash += (hash << 3);
+ hash ^= (hash >> 11);
+ hash += (hash << 15);
+
+ return hash % size;
+}
+
+/**
+ * batadv_tt_hash_find - look for a client in the given hash table
+ * @hash: the hash table to search
+ * @addr: the mac address of the client to look for
+ * @vid: VLAN identifier
+ *
+ * Returns a pointer to the tt_common struct belonging to the searched client if
+ * found, NULL otherwise.
+ */
static struct batadv_tt_common_entry *
-batadv_tt_hash_find(struct batadv_hashtable *hash, const void *data)
+batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr,
+ unsigned short vid)
{
struct hlist_head *head;
- struct batadv_tt_common_entry *tt_common_entry;
- struct batadv_tt_common_entry *tt_common_entry_tmp = NULL;
+ struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL;
uint32_t index;
if (!hash)
return NULL;
- index = batadv_choose_orig(data, hash->size);
+ memcpy(to_search.addr, addr, ETH_ALEN);
+ to_search.vid = vid;
+
+ index = batadv_choose_tt(&to_search, hash->size);
head = &hash->table[index];
rcu_read_lock();
- hlist_for_each_entry_rcu(tt_common_entry, head, hash_entry) {
- if (!batadv_compare_eth(tt_common_entry, data))
+ hlist_for_each_entry_rcu(tt, head, hash_entry) {
+ if (!batadv_compare_eth(tt, addr))
+ continue;
+
+ if (tt->vid != vid)
continue;
- if (!atomic_inc_not_zero(&tt_common_entry->refcount))
+ if (!atomic_inc_not_zero(&tt->refcount))
continue;
- tt_common_entry_tmp = tt_common_entry;
+ tt_tmp = tt;
break;
}
rcu_read_unlock();
- return tt_common_entry_tmp;
+ return tt_tmp;
}
+/**
+ * batadv_tt_local_hash_find - search the local table for a given client
+ * @bat_priv: the bat priv with all the soft interface information
+ * @addr: the mac address of the client to look for
+ * @vid: VLAN identifier
+ *
+ * Returns a pointer to the corresponding tt_local_entry struct if the client is
+ * found, NULL otherwise.
+ */
static struct batadv_tt_local_entry *
-batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const void *data)
+batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr,
+ unsigned short vid)
{
struct batadv_tt_common_entry *tt_common_entry;
struct batadv_tt_local_entry *tt_local_entry = NULL;
- tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, data);
+ tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr,
+ vid);
if (tt_common_entry)
tt_local_entry = container_of(tt_common_entry,
struct batadv_tt_local_entry,
return tt_local_entry;
}
+/**
+ * batadv_tt_global_hash_find - search the global table for a given client
+ * @bat_priv: the bat priv with all the soft interface information
+ * @addr: the mac address of the client to look for
+ * @vid: VLAN identifier
+ *
+ * Returns a pointer to the corresponding tt_global_entry struct if the client
+ * is found, NULL otherwise.
+ */
static struct batadv_tt_global_entry *
-batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const void *data)
+batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr,
+ unsigned short vid)
{
struct batadv_tt_common_entry *tt_common_entry;
struct batadv_tt_global_entry *tt_global_entry = NULL;
- tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, data);
+ tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr,
+ vid);
if (tt_common_entry)
tt_global_entry = container_of(tt_common_entry,
struct batadv_tt_global_entry,
kfree_rcu(tt_local_entry, common.rcu);
}
-static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu)
-{
- struct batadv_tt_common_entry *tt_common_entry;
- struct batadv_tt_global_entry *tt_global_entry;
-
- tt_common_entry = container_of(rcu, struct batadv_tt_common_entry, rcu);
- tt_global_entry = container_of(tt_common_entry,
- struct batadv_tt_global_entry, common);
-
- kfree(tt_global_entry);
-}
-
+/**
+ * batadv_tt_global_entry_free_ref - decrement the refcounter for a
+ * tt_global_entry and possibly free it
+ * @tt_global_entry: the object to free
+ */
static void
batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry)
{
if (atomic_dec_and_test(&tt_global_entry->common.refcount)) {
batadv_tt_global_del_orig_list(tt_global_entry);
- call_rcu(&tt_global_entry->common.rcu,
- batadv_tt_global_entry_free_rcu);
+ kfree_rcu(tt_global_entry, common.rcu);
}
}
kfree(orig_entry);
}
+/**
+ * batadv_tt_local_size_mod - change the size by v of the local table identified
+ * by vid
+ * @bat_priv: the bat priv with all the soft interface information
+ * @vid: the VLAN identifier of the sub-table to change
+ * @v: the amount to sum to the local table size
+ */
+static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv,
+ unsigned short vid, int v)
+{
+ struct batadv_softif_vlan *vlan;
+
+ vlan = batadv_softif_vlan_get(bat_priv, vid);
+ if (!vlan)
+ return;
+
+ atomic_add(v, &vlan->tt.num_entries);
+
+ batadv_softif_vlan_free_ref(vlan);
+}
+
+/**
+ * batadv_tt_local_size_inc - increase by one the local table size for the given
+ * vid
+ * @bat_priv: the bat priv with all the soft interface information
+ * @vid: the VLAN identifier
+ */
+static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv,
+ unsigned short vid)
+{
+ batadv_tt_local_size_mod(bat_priv, vid, 1);
+}
+
+/**
+ * batadv_tt_local_size_dec - decrease by one the local table size for the given
+ * vid
+ * @bat_priv: the bat priv with all the soft interface information
+ * @vid: the VLAN identifier
+ */
+static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv,
+ unsigned short vid)
+{
+ batadv_tt_local_size_mod(bat_priv, vid, -1);
+}
+
+/**
+ * batadv_tt_global_size_mod - change the size by v of the local table
+ * identified by vid
+ * @bat_priv: the bat priv with all the soft interface information
+ * @vid: the VLAN identifier
+ * @v: the amount to sum to the global table size
+ */
+static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node,
+ unsigned short vid, int v)
+{
+ struct batadv_orig_node_vlan *vlan;
+
+ vlan = batadv_orig_node_vlan_new(orig_node, vid);
+ if (!vlan)
+ return;
+
+ if (atomic_add_return(v, &vlan->tt.num_entries) == 0) {
+ spin_lock_bh(&orig_node->vlan_list_lock);
+ list_del_rcu(&vlan->list);
+ spin_unlock_bh(&orig_node->vlan_list_lock);
+ batadv_orig_node_vlan_free_ref(vlan);
+ }
+
+ batadv_orig_node_vlan_free_ref(vlan);
+}
+
+/**
+ * batadv_tt_global_size_inc - increase by one the global table size for the
+ * given vid
+ * @orig_node: the originator which global table size has to be decreased
+ * @vid: the vlan identifier
+ */
+static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node,
+ unsigned short vid)
+{
+ batadv_tt_global_size_mod(orig_node, vid, 1);
+}
+
+/**
+ * batadv_tt_global_size_dec - decrease by one the global table size for the
+ * given vid
+ * @orig_node: the originator which global table size has to be decreased
+ * @vid: the vlan identifier
+ */
+static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node,
+ unsigned short vid)
+{
+ batadv_tt_global_size_mod(orig_node, vid, -1);
+}
+
static void
batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry)
{
if (!atomic_dec_and_test(&orig_entry->refcount))
return;
- /* to avoid race conditions, immediately decrease the tt counter */
- atomic_dec(&orig_entry->orig_node->tt_size);
+
call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu);
}
bool del_op_requested, del_op_entry;
tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC);
-
if (!tt_change_node)
return;
tt_change_node->change.flags = flags;
+ tt_change_node->change.reserved = 0;
memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN);
+ tt_change_node->change.vid = htons(common->vid);
del_op_requested = flags & BATADV_TT_CLIENT_DEL;
goto del;
if (del_op_requested && !del_op_entry)
goto del;
+
+ /* this is a second add in the same originator interval. It
+ * means that flags have been changed: update them!
+ */
+ if (!del_op_requested && !del_op_entry)
+ entry->change.flags = flags;
+
continue;
del:
list_del(&entry->list);
atomic_inc(&bat_priv->tt.local_changes);
}
-int batadv_tt_len(int changes_num)
+/**
+ * batadv_tt_len - compute length in bytes of given number of tt changes
+ * @changes_num: number of tt changes
+ *
+ * Returns computed length in bytes.
+ */
+static int batadv_tt_len(int changes_num)
+{
+ return changes_num * sizeof(struct batadv_tvlv_tt_change);
+}
+
+/**
+ * batadv_tt_entries - compute the number of entries fitting in tt_len bytes
+ * @tt_len: available space
+ *
+ * Returns the number of entries.
+ */
+static uint16_t batadv_tt_entries(uint16_t tt_len)
+{
+ return tt_len / batadv_tt_len(1);
+}
+
+/**
+ * batadv_tt_local_table_transmit_size - calculates the local translation table
+ * size when transmitted over the air
+ * @bat_priv: the bat priv with all the soft interface information
+ *
+ * Returns local translation table size in bytes.
+ */
+static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv)
{
- return changes_num * sizeof(struct batadv_tt_change);
+ uint16_t num_vlan = 0, tt_local_entries = 0;
+ struct batadv_softif_vlan *vlan;
+ int hdr_size;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
+ num_vlan++;
+ tt_local_entries += atomic_read(&vlan->tt.num_entries);
+ }
+ rcu_read_unlock();
+
+ /* header size of tvlv encapsulated tt response payload */
+ hdr_size = sizeof(struct batadv_unicast_tvlv_packet);
+ hdr_size += sizeof(struct batadv_tvlv_hdr);
+ hdr_size += sizeof(struct batadv_tvlv_tt_data);
+ hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data);
+
+ return hdr_size + batadv_tt_len(tt_local_entries);
}
static int batadv_tt_local_init(struct batadv_priv *bat_priv)
const char *message)
{
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Deleting global tt entry %pM: %s\n",
- tt_global->common.addr, message);
+ "Deleting global tt entry %pM (vid: %d): %s\n",
+ tt_global->common.addr,
+ BATADV_PRINT_VID(tt_global->common.vid), message);
batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt,
- batadv_choose_orig, tt_global->common.addr);
+ batadv_choose_tt, &tt_global->common);
batadv_tt_global_entry_free_ref(tt_global);
}
-void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
- int ifindex)
+/**
+ * batadv_tt_local_add - add a new client to the local table or update an
+ * existing client
+ * @soft_iface: netdev struct of the mesh interface
+ * @addr: the mac address of the client to add
+ * @vid: VLAN identifier
+ * @ifindex: index of the interface where the client is connected to (useful to
+ * identify wireless clients)
+ *
+ * Returns true if the client was successfully added, false otherwise.
+ */
+bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
+ unsigned short vid, int ifindex)
{
struct batadv_priv *bat_priv = netdev_priv(soft_iface);
struct batadv_tt_local_entry *tt_local;
struct batadv_tt_global_entry *tt_global;
+ struct net_device *in_dev = NULL;
struct hlist_head *head;
struct batadv_tt_orig_list_entry *orig_entry;
- int hash_added;
- bool roamed_back = false;
+ int hash_added, table_size, packet_size_max;
+ bool ret = false, roamed_back = false;
+ uint8_t remote_flags;
- tt_local = batadv_tt_local_hash_find(bat_priv, addr);
- tt_global = batadv_tt_global_hash_find(bat_priv, addr);
+ if (ifindex != BATADV_NULL_IFINDEX)
+ in_dev = dev_get_by_index(&init_net, ifindex);
+
+ tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid);
+ tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid);
if (tt_local) {
tt_local->last_seen = jiffies;
if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) {
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Re-adding pending client %pM\n", addr);
+ "Re-adding pending client %pM (vid: %d)\n",
+ addr, BATADV_PRINT_VID(vid));
/* whatever the reason why the PENDING flag was set,
* this is a client which was enqueued to be removed in
* this orig_interval. Since it popped up again, the
if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) {
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Roaming client %pM came back to its original location\n",
- addr);
+ "Roaming client %pM (vid: %d) came back to its original location\n",
+ addr, BATADV_PRINT_VID(vid));
/* the ROAM flag is set because this client roamed away
* and the node got a roaming_advertisement message. Now
* that the client popped up again at its original
goto check_roaming;
}
+ /* Ignore the client if we cannot send it in a full table response. */
+ table_size = batadv_tt_local_table_transmit_size(bat_priv);
+ table_size += batadv_tt_len(1);
+ packet_size_max = atomic_read(&bat_priv->packet_size_max);
+ if (table_size > packet_size_max) {
+ net_ratelimited_function(batadv_info, soft_iface,
+ "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n",
+ table_size, packet_size_max, addr);
+ goto out;
+ }
+
tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC);
if (!tt_local)
goto out;
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Creating new local tt entry: %pM (ttvn: %d)\n", addr,
+ "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n",
+ addr, BATADV_PRINT_VID(vid),
(uint8_t)atomic_read(&bat_priv->tt.vn));
memcpy(tt_local->common.addr, addr, ETH_ALEN);
* (consistency check)
*/
tt_local->common.flags = BATADV_TT_CLIENT_NEW;
- if (batadv_is_wifi_iface(ifindex))
+ tt_local->common.vid = vid;
+ if (batadv_is_wifi_netdev(in_dev))
tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
atomic_set(&tt_local->common.refcount, 2);
tt_local->last_seen = jiffies;
tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE;
hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt,
- batadv_choose_orig, &tt_local->common,
+ batadv_choose_tt, &tt_local->common,
&tt_local->common.hash_entry);
if (unlikely(hash_added != 0)) {
rcu_read_lock();
hlist_for_each_entry_rcu(orig_entry, head, list) {
batadv_send_roam_adv(bat_priv, tt_global->common.addr,
+ tt_global->common.vid,
orig_entry->orig_node);
}
rcu_read_unlock();
}
}
+ /* store the current remote flags before altering them. This helps
+ * understanding is flags are changing or not
+ */
+ remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK;
+
+ if (batadv_is_wifi_netdev(in_dev))
+ tt_local->common.flags |= BATADV_TT_CLIENT_WIFI;
+ else
+ tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI;
+
+ /* if any "dynamic" flag has been modified, resend an ADD event for this
+ * entry so that all the nodes can get the new flags
+ */
+ if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK))
+ batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS);
+
+ ret = true;
out:
+ if (in_dev)
+ dev_put(in_dev);
if (tt_local)
batadv_tt_local_entry_free_ref(tt_local);
if (tt_global)
batadv_tt_global_entry_free_ref(tt_global);
+ return ret;
}
-static void batadv_tt_realloc_packet_buff(unsigned char **packet_buff,
- int *packet_buff_len,
- int min_packet_len,
- int new_packet_len)
+/**
+ * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send
+ * within a TT Response directed to another node
+ * @orig_node: originator for which the TT data has to be prepared
+ * @tt_data: uninitialised pointer to the address of the TVLV buffer
+ * @tt_change: uninitialised pointer to the address of the area where the TT
+ * changed can be stored
+ * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
+ * function reserves the amount of space needed to send the entire global TT
+ * table. In case of success the value is updated with the real amount of
+ * reserved bytes
+
+ * Allocate the needed amount of memory for the entire TT TVLV and write its
+ * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
+ * objects, one per active VLAN served by the originator node.
+ *
+ * Return the size of the allocated buffer or 0 in case of failure.
+ */
+static uint16_t
+batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node,
+ struct batadv_tvlv_tt_data **tt_data,
+ struct batadv_tvlv_tt_change **tt_change,
+ int32_t *tt_len)
{
- unsigned char *new_buff;
+ uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len;
+ struct batadv_tvlv_tt_vlan_data *tt_vlan;
+ struct batadv_orig_node_vlan *vlan;
+ uint8_t *tt_change_ptr;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
+ num_vlan++;
+ num_entries += atomic_read(&vlan->tt.num_entries);
+ }
+
+ change_offset = sizeof(**tt_data);
+ change_offset += num_vlan * sizeof(*tt_vlan);
- new_buff = kmalloc(new_packet_len, GFP_ATOMIC);
+ /* if tt_len is negative, allocate the space needed by the full table */
+ if (*tt_len < 0)
+ *tt_len = batadv_tt_len(num_entries);
- /* keep old buffer if kmalloc should fail */
- if (new_buff) {
- memcpy(new_buff, *packet_buff, min_packet_len);
- kfree(*packet_buff);
- *packet_buff = new_buff;
- *packet_buff_len = new_packet_len;
+ tvlv_len = *tt_len;
+ tvlv_len += change_offset;
+
+ *tt_data = kmalloc(tvlv_len, GFP_ATOMIC);
+ if (!*tt_data) {
+ *tt_len = 0;
+ goto out;
+ }
+
+ (*tt_data)->flags = BATADV_NO_FLAGS;
+ (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn);
+ (*tt_data)->num_vlan = htons(num_vlan);
+
+ tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
+ list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
+ tt_vlan->vid = htons(vlan->vid);
+ tt_vlan->crc = htonl(vlan->tt.crc);
+
+ tt_vlan++;
}
+
+ tt_change_ptr = (uint8_t *)*tt_data + change_offset;
+ *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
+
+out:
+ rcu_read_unlock();
+ return tvlv_len;
}
-static void batadv_tt_prepare_packet_buff(struct batadv_priv *bat_priv,
- unsigned char **packet_buff,
- int *packet_buff_len,
- int min_packet_len)
-{
- int req_len;
+/**
+ * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this
+ * node
+ * @bat_priv: the bat priv with all the soft interface information
+ * @tt_data: uninitialised pointer to the address of the TVLV buffer
+ * @tt_change: uninitialised pointer to the address of the area where the TT
+ * changes can be stored
+ * @tt_len: pointer to the length to reserve to the tt_change. if -1 this
+ * function reserves the amount of space needed to send the entire local TT
+ * table. In case of success the value is updated with the real amount of
+ * reserved bytes
+ *
+ * Allocate the needed amount of memory for the entire TT TVLV and write its
+ * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data
+ * objects, one per active VLAN.
+ *
+ * Return the size of the allocated buffer or 0 in case of failure.
+ */
+static uint16_t
+batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv,
+ struct batadv_tvlv_tt_data **tt_data,
+ struct batadv_tvlv_tt_change **tt_change,
+ int32_t *tt_len)
+{
+ struct batadv_tvlv_tt_vlan_data *tt_vlan;
+ struct batadv_softif_vlan *vlan;
+ uint16_t num_vlan = 0, num_entries = 0, tvlv_len;
+ uint8_t *tt_change_ptr;
+ int change_offset;
- req_len = min_packet_len;
- req_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes));
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
+ num_vlan++;
+ num_entries += atomic_read(&vlan->tt.num_entries);
+ }
- /* if we have too many changes for one packet don't send any
- * and wait for the tt table request which will be fragmented
- */
- if (req_len > bat_priv->soft_iface->mtu)
- req_len = min_packet_len;
+ change_offset = sizeof(**tt_data);
+ change_offset += num_vlan * sizeof(*tt_vlan);
+
+ /* if tt_len is negative, allocate the space needed by the full table */
+ if (*tt_len < 0)
+ *tt_len = batadv_tt_len(num_entries);
+
+ tvlv_len = *tt_len;
+ tvlv_len += change_offset;
+
+ *tt_data = kmalloc(tvlv_len, GFP_ATOMIC);
+ if (!*tt_data) {
+ tvlv_len = 0;
+ goto out;
+ }
+
+ (*tt_data)->flags = BATADV_NO_FLAGS;
+ (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn);
+ (*tt_data)->num_vlan = htons(num_vlan);
+
+ tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
+ hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
+ tt_vlan->vid = htons(vlan->vid);
+ tt_vlan->crc = htonl(vlan->tt.crc);
- batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len,
- min_packet_len, req_len);
+ tt_vlan++;
+ }
+
+ tt_change_ptr = (uint8_t *)*tt_data + change_offset;
+ *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
+
+out:
+ rcu_read_unlock();
+ return tvlv_len;
}
-static int batadv_tt_changes_fill_buff(struct batadv_priv *bat_priv,
- unsigned char **packet_buff,
- int *packet_buff_len,
- int min_packet_len)
+/**
+ * batadv_tt_tvlv_container_update - update the translation table tvlv container
+ * after local tt changes have been committed
+ * @bat_priv: the bat priv with all the soft interface information
+ */
+static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv)
{
struct batadv_tt_change_node *entry, *safe;
- int count = 0, tot_changes = 0, new_len;
- unsigned char *tt_buff;
+ struct batadv_tvlv_tt_data *tt_data;
+ struct batadv_tvlv_tt_change *tt_change;
+ int tt_diff_len, tt_change_len = 0;
+ int tt_diff_entries_num = 0, tt_diff_entries_count = 0;
+ uint16_t tvlv_len;
+
+ tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes);
+ tt_diff_len = batadv_tt_len(tt_diff_entries_num);
+
+ /* if we have too many changes for one packet don't send any
+ * and wait for the tt table request which will be fragmented
+ */
+ if (tt_diff_len > bat_priv->soft_iface->mtu)
+ tt_diff_len = 0;
- batadv_tt_prepare_packet_buff(bat_priv, packet_buff,
- packet_buff_len, min_packet_len);
+ tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data,
+ &tt_change, &tt_diff_len);
+ if (!tvlv_len)
+ return;
- new_len = *packet_buff_len - min_packet_len;
- tt_buff = *packet_buff + min_packet_len;
+ tt_data->flags = BATADV_TT_OGM_DIFF;
- if (new_len > 0)
- tot_changes = new_len / batadv_tt_len(1);
+ if (tt_diff_len == 0)
+ goto container_register;
spin_lock_bh(&bat_priv->tt.changes_list_lock);
atomic_set(&bat_priv->tt.local_changes, 0);
list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
list) {
- if (count < tot_changes) {
- memcpy(tt_buff + batadv_tt_len(count),
- &entry->change, sizeof(struct batadv_tt_change));
- count++;
+ if (tt_diff_entries_count < tt_diff_entries_num) {
+ memcpy(tt_change + tt_diff_entries_count,
+ &entry->change,
+ sizeof(struct batadv_tvlv_tt_change));
+ tt_diff_entries_count++;
}
list_del(&entry->list);
kfree(entry);
kfree(bat_priv->tt.last_changeset);
bat_priv->tt.last_changeset_len = 0;
bat_priv->tt.last_changeset = NULL;
+ tt_change_len = batadv_tt_len(tt_diff_entries_count);
/* check whether this new OGM has no changes due to size problems */
- if (new_len > 0) {
+ if (tt_diff_entries_count > 0) {
/* if kmalloc() fails we will reply with the full table
* instead of providing the diff
*/
- bat_priv->tt.last_changeset = kmalloc(new_len, GFP_ATOMIC);
+ bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC);
if (bat_priv->tt.last_changeset) {
- memcpy(bat_priv->tt.last_changeset, tt_buff, new_len);
- bat_priv->tt.last_changeset_len = new_len;
+ memcpy(bat_priv->tt.last_changeset,
+ tt_change, tt_change_len);
+ bat_priv->tt.last_changeset_len = tt_diff_len;
}
}
spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
- return count;
+container_register:
+ batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data,
+ tvlv_len);
+ kfree(tt_data);
}
int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset)
struct batadv_tt_common_entry *tt_common_entry;
struct batadv_tt_local_entry *tt_local;
struct batadv_hard_iface *primary_if;
+ struct batadv_softif_vlan *vlan;
struct hlist_head *head;
+ unsigned short vid;
uint32_t i;
int last_seen_secs;
int last_seen_msecs;
goto out;
seq_printf(seq,
- "Locally retrieved addresses (from %s) announced via TT (TTVN: %u CRC: %#.4x):\n",
- net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn),
- bat_priv->tt.local_crc);
- seq_printf(seq, " %-13s %-7s %-10s\n", "Client", "Flags",
- "Last seen");
+ "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n",
+ net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn));
+ seq_printf(seq, " %-13s %s %-7s %-9s (%-10s)\n", "Client", "VID",
+ "Flags", "Last seen", "CRC");
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
tt_local = container_of(tt_common_entry,
struct batadv_tt_local_entry,
common);
+ vid = tt_common_entry->vid;
last_seen_jiffies = jiffies - tt_local->last_seen;
last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
last_seen_secs = last_seen_msecs / 1000;
no_purge = tt_common_entry->flags & np_flag;
- seq_printf(seq, " * %pM [%c%c%c%c%c] %3u.%03u\n",
+ vlan = batadv_softif_vlan_get(bat_priv, vid);
+ if (!vlan) {
+ seq_printf(seq, "Cannot retrieve VLAN %d\n",
+ BATADV_PRINT_VID(vid));
+ continue;
+ }
+
+ seq_printf(seq,
+ " * %pM %4i [%c%c%c%c%c] %3u.%03u (%#.8x)\n",
tt_common_entry->addr,
+ BATADV_PRINT_VID(tt_common_entry->vid),
(tt_common_entry->flags &
BATADV_TT_CLIENT_ROAM ? 'R' : '.'),
no_purge ? 'P' : '.',
(tt_common_entry->flags &
BATADV_TT_CLIENT_WIFI ? 'W' : '.'),
no_purge ? 0 : last_seen_secs,
- no_purge ? 0 : last_seen_msecs);
+ no_purge ? 0 : last_seen_msecs,
+ vlan->tt.crc);
+
+ batadv_softif_vlan_free_ref(vlan);
}
rcu_read_unlock();
}
tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING;
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Local tt entry (%pM) pending to be removed: %s\n",
- tt_local_entry->common.addr, message);
+ "Local tt entry (%pM, vid: %d) pending to be removed: %s\n",
+ tt_local_entry->common.addr,
+ BATADV_PRINT_VID(tt_local_entry->common.vid), message);
}
/**
* batadv_tt_local_remove - logically remove an entry from the local table
* @bat_priv: the bat priv with all the soft interface information
* @addr: the MAC address of the client to remove
+ * @vid: VLAN identifier
* @message: message to append to the log on deletion
* @roaming: true if the deletion is due to a roaming event
*
* Returns the flags assigned to the local entry before being deleted
*/
uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv,
- const uint8_t *addr, const char *message,
- bool roaming)
+ const uint8_t *addr, unsigned short vid,
+ const char *message, bool roaming)
{
struct batadv_tt_local_entry *tt_local_entry;
uint16_t flags, curr_flags = BATADV_NO_FLAGS;
- tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr);
+ tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
if (!tt_local_entry)
goto out;
return curr_flags;
}
+/**
+ * batadv_tt_local_purge_list - purge inactive tt local entries
+ * @bat_priv: the bat priv with all the soft interface information
+ * @head: pointer to the list containing the local tt entries
+ * @timeout: parameter deciding whether a given tt local entry is considered
+ * inactive or not
+ */
static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv,
- struct hlist_head *head)
+ struct hlist_head *head,
+ int timeout)
{
struct batadv_tt_local_entry *tt_local_entry;
struct batadv_tt_common_entry *tt_common_entry;
if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)
continue;
- if (!batadv_has_timed_out(tt_local_entry->last_seen,
- BATADV_TT_LOCAL_TIMEOUT))
+ if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout))
continue;
batadv_tt_local_set_pending(bat_priv, tt_local_entry,
}
}
-static void batadv_tt_local_purge(struct batadv_priv *bat_priv)
+/**
+ * batadv_tt_local_purge - purge inactive tt local entries
+ * @bat_priv: the bat priv with all the soft interface information
+ * @timeout: parameter deciding whether a given tt local entry is considered
+ * inactive or not
+ */
+static void batadv_tt_local_purge(struct batadv_priv *bat_priv,
+ int timeout)
{
struct batadv_hashtable *hash = bat_priv->tt.local_hash;
struct hlist_head *head;
list_lock = &hash->list_locks[i];
spin_lock_bh(list_lock);
- batadv_tt_local_purge_list(bat_priv, head);
+ batadv_tt_local_purge_list(bat_priv, head, timeout);
spin_unlock_bh(list_lock);
}
}
INIT_HLIST_NODE(&orig_entry->list);
atomic_inc(&orig_node->refcount);
- atomic_inc(&orig_node->tt_size);
+ batadv_tt_global_size_inc(orig_node, tt_global->common.vid);
orig_entry->orig_node = orig_node;
orig_entry->ttvn = ttvn;
atomic_set(&orig_entry->refcount, 2);
* @bat_priv: the bat priv with all the soft interface information
* @orig_node: the originator announcing the client
* @tt_addr: the mac address of the non-mesh client
+ * @vid: VLAN identifier
* @flags: TT flags that have to be set for this non-mesh client
* @ttvn: the tt version number ever announcing this non-mesh client
*
* If a TT local entry exists for this non-mesh client remove it.
*
* The caller must hold orig_node refcount.
+ *
+ * Return true if the new entry has been added, false otherwise
*/
-int batadv_tt_global_add(struct batadv_priv *bat_priv,
- struct batadv_orig_node *orig_node,
- const unsigned char *tt_addr, uint16_t flags,
- uint8_t ttvn)
+static bool batadv_tt_global_add(struct batadv_priv *bat_priv,
+ struct batadv_orig_node *orig_node,
+ const unsigned char *tt_addr,
+ unsigned short vid, uint16_t flags,
+ uint8_t ttvn)
{
struct batadv_tt_global_entry *tt_global_entry;
struct batadv_tt_local_entry *tt_local_entry;
- int ret = 0;
+ bool ret = false;
int hash_added;
struct batadv_tt_common_entry *common;
uint16_t local_flags;
- tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr);
- tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr);
+ /* ignore global entries from backbone nodes */
+ if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid))
+ return true;
+
+ tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid);
+ tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid);
/* if the node already has a local client for this entry, it has to wait
* for a roaming advertisement instead of manually messing up the global
common = &tt_global_entry->common;
memcpy(common->addr, tt_addr, ETH_ALEN);
+ common->vid = vid;
common->flags = flags;
tt_global_entry->roam_at = 0;
hash_added = batadv_hash_add(bat_priv->tt.global_hash,
batadv_compare_tt,
- batadv_choose_orig, common,
+ batadv_choose_tt, common,
&common->hash_entry);
if (unlikely(hash_added != 0)) {
batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn);
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Creating new global tt entry: %pM (via %pM)\n",
- common->addr, orig_node->orig);
- ret = 1;
+ "Creating new global tt entry: %pM (vid: %d, via %pM)\n",
+ common->addr, BATADV_PRINT_VID(common->vid),
+ orig_node->orig);
+ ret = true;
out_remove:
/* remove address from local hash if present */
- local_flags = batadv_tt_local_remove(bat_priv, tt_addr,
+ local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid,
"global tt received",
flags & BATADV_TT_CLIENT_ROAM);
tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI;
}
/* batadv_transtable_best_orig - Get best originator list entry from tt entry
+ * @bat_priv: the bat priv with all the soft interface information
* @tt_global_entry: global translation table entry to be analyzed
*
* This functon assumes the caller holds rcu_read_lock().
* Returns best originator list entry or NULL on errors.
*/
static struct batadv_tt_orig_list_entry *
-batadv_transtable_best_orig(struct batadv_tt_global_entry *tt_global_entry)
+batadv_transtable_best_orig(struct batadv_priv *bat_priv,
+ struct batadv_tt_global_entry *tt_global_entry)
{
- struct batadv_neigh_node *router = NULL;
+ struct batadv_neigh_node *router, *best_router = NULL;
+ struct batadv_algo_ops *bao = bat_priv->bat_algo_ops;
struct hlist_head *head;
struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL;
- int best_tq = 0;
head = &tt_global_entry->orig_list;
hlist_for_each_entry_rcu(orig_entry, head, list) {
if (!router)
continue;
- if (router->tq_avg > best_tq) {
- best_entry = orig_entry;
- best_tq = router->tq_avg;
+ if (best_router &&
+ bao->bat_neigh_cmp(router, best_router) <= 0) {
+ batadv_neigh_node_free_ref(router);
+ continue;
}
- batadv_neigh_node_free_ref(router);
+ /* release the refcount for the "old" best */
+ if (best_router)
+ batadv_neigh_node_free_ref(best_router);
+
+ best_entry = orig_entry;
+ best_router = router;
}
+ if (best_router)
+ batadv_neigh_node_free_ref(best_router);
+
return best_entry;
}
/* batadv_tt_global_print_entry - print all orig nodes who announce the address
* for this global entry
+ * @bat_priv: the bat priv with all the soft interface information
* @tt_global_entry: global translation table entry to be printed
* @seq: debugfs table seq_file struct
*
* This functon assumes the caller holds rcu_read_lock().
*/
static void
-batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry,
+batadv_tt_global_print_entry(struct batadv_priv *bat_priv,
+ struct batadv_tt_global_entry *tt_global_entry,
struct seq_file *seq)
{
- struct hlist_head *head;
struct batadv_tt_orig_list_entry *orig_entry, *best_entry;
struct batadv_tt_common_entry *tt_common_entry;
- uint16_t flags;
+ struct batadv_orig_node_vlan *vlan;
+ struct hlist_head *head;
uint8_t last_ttvn;
+ uint16_t flags;
tt_common_entry = &tt_global_entry->common;
flags = tt_common_entry->flags;
- best_entry = batadv_transtable_best_orig(tt_global_entry);
+ best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
if (best_entry) {
+ vlan = batadv_orig_node_vlan_get(best_entry->orig_node,
+ tt_common_entry->vid);
+ if (!vlan) {
+ seq_printf(seq,
+ " * Cannot retrieve VLAN %d for originator %pM\n",
+ BATADV_PRINT_VID(tt_common_entry->vid),
+ best_entry->orig_node->orig);
+ goto print_list;
+ }
+
last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn);
seq_printf(seq,
- " %c %pM (%3u) via %pM (%3u) (%#.4x) [%c%c%c]\n",
+ " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n",
'*', tt_global_entry->common.addr,
+ BATADV_PRINT_VID(tt_global_entry->common.vid),
best_entry->ttvn, best_entry->orig_node->orig,
- last_ttvn, best_entry->orig_node->tt_crc,
+ last_ttvn, vlan->tt.crc,
(flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'),
(flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'),
(flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.'));
+
+ batadv_orig_node_vlan_free_ref(vlan);
}
+print_list:
head = &tt_global_entry->orig_list;
hlist_for_each_entry_rcu(orig_entry, head, list) {
if (best_entry == orig_entry)
continue;
+ vlan = batadv_orig_node_vlan_get(orig_entry->orig_node,
+ tt_common_entry->vid);
+ if (!vlan) {
+ seq_printf(seq,
+ " + Cannot retrieve VLAN %d for originator %pM\n",
+ BATADV_PRINT_VID(tt_common_entry->vid),
+ orig_entry->orig_node->orig);
+ continue;
+ }
+
last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn);
- seq_printf(seq, " %c %pM (%3u) via %pM (%3u) [%c%c%c]\n",
+ seq_printf(seq,
+ " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n",
'+', tt_global_entry->common.addr,
+ BATADV_PRINT_VID(tt_global_entry->common.vid),
orig_entry->ttvn, orig_entry->orig_node->orig,
- last_ttvn,
+ last_ttvn, vlan->tt.crc,
(flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'),
(flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'),
(flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.'));
+
+ batadv_orig_node_vlan_free_ref(vlan);
}
}
seq_printf(seq,
"Globally announced TT entries received via the mesh %s\n",
net_dev->name);
- seq_printf(seq, " %-13s %s %-15s %s (%-6s) %s\n",
- "Client", "(TTVN)", "Originator", "(Curr TTVN)", "CRC",
- "Flags");
+ seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n",
+ "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)",
+ "CRC", "Flags");
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
tt_global = container_of(tt_common_entry,
struct batadv_tt_global_entry,
common);
- batadv_tt_global_print_entry(tt_global, seq);
+ batadv_tt_global_print_entry(bat_priv, tt_global, seq);
}
rcu_read_unlock();
}
head = &tt_global_entry->orig_list;
hlist_for_each_entry_safe(orig_entry, safe, head, list) {
hlist_del_rcu(&orig_entry->list);
+ batadv_tt_global_size_dec(orig_entry->orig_node,
+ tt_global_entry->common.vid);
batadv_tt_orig_list_entry_free_ref(orig_entry);
}
spin_unlock_bh(&tt_global_entry->list_lock);
struct hlist_head *head;
struct hlist_node *safe;
struct batadv_tt_orig_list_entry *orig_entry;
+ unsigned short vid;
spin_lock_bh(&tt_global_entry->list_lock);
head = &tt_global_entry->orig_list;
hlist_for_each_entry_safe(orig_entry, safe, head, list) {
if (orig_entry->orig_node == orig_node) {
+ vid = tt_global_entry->common.vid;
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Deleting %pM from global tt entry %pM: %s\n",
+ "Deleting %pM from global tt entry %pM (vid: %d): %s\n",
orig_node->orig,
- tt_global_entry->common.addr, message);
+ tt_global_entry->common.addr,
+ BATADV_PRINT_VID(vid), message);
hlist_del_rcu(&orig_entry->list);
+ batadv_tt_global_size_dec(orig_node,
+ tt_global_entry->common.vid);
batadv_tt_orig_list_entry_free_ref(orig_entry);
}
}
orig_node, message);
}
-
-
+/**
+ * batadv_tt_global_del - remove a client from the global table
+ * @bat_priv: the bat priv with all the soft interface information
+ * @orig_node: an originator serving this client
+ * @addr: the mac address of the client
+ * @vid: VLAN identifier
+ * @message: a message explaining the reason for deleting the client to print
+ * for debugging purpose
+ * @roaming: true if the deletion has been triggered by a roaming event
+ */
static void batadv_tt_global_del(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
- const unsigned char *addr,
+ const unsigned char *addr, unsigned short vid,
const char *message, bool roaming)
{
struct batadv_tt_global_entry *tt_global_entry;
struct batadv_tt_local_entry *local_entry = NULL;
- tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr);
+ tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
if (!tt_global_entry)
goto out;
* the global entry, since it is useless now.
*/
local_entry = batadv_tt_local_hash_find(bat_priv,
- tt_global_entry->common.addr);
+ tt_global_entry->common.addr,
+ vid);
if (local_entry) {
/* local entry exists, case 2: client roamed to us. */
batadv_tt_global_del_orig_list(tt_global_entry);
batadv_tt_local_entry_free_ref(local_entry);
}
+/**
+ * batadv_tt_global_del_orig - remove all the TT global entries belonging to the
+ * given originator matching the provided vid
+ * @bat_priv: the bat priv with all the soft interface information
+ * @orig_node: the originator owning the entries to remove
+ * @match_vid: the VLAN identifier to match. If negative all the entries will be
+ * removed
+ * @message: debug message to print as "reason"
+ */
void batadv_tt_global_del_orig(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
+ int32_t match_vid,
const char *message)
{
struct batadv_tt_global_entry *tt_global;
struct hlist_node *safe;
struct hlist_head *head;
spinlock_t *list_lock; /* protects write access to the hash lists */
+ unsigned short vid;
if (!hash)
return;
spin_lock_bh(list_lock);
hlist_for_each_entry_safe(tt_common_entry, safe,
head, hash_entry) {
+ /* remove only matching entries */
+ if (match_vid >= 0 && tt_common_entry->vid != match_vid)
+ continue;
+
tt_global = container_of(tt_common_entry,
struct batadv_tt_global_entry,
common);
orig_node, message);
if (hlist_empty(&tt_global->orig_list)) {
+ vid = tt_global->common.vid;
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Deleting global tt entry %pM: %s\n",
- tt_global->common.addr, message);
+ "Deleting global tt entry %pM (vid: %d): %s\n",
+ tt_global->common.addr,
+ BATADV_PRINT_VID(vid), message);
hlist_del_rcu(&tt_common_entry->hash_entry);
batadv_tt_global_entry_free_ref(tt_global);
}
continue;
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Deleting global tt entry (%pM): %s\n",
- tt_global->common.addr, msg);
+ "Deleting global tt entry %pM (vid: %d): %s\n",
+ tt_global->common.addr,
+ BATADV_PRINT_VID(tt_global->common.vid),
+ msg);
hlist_del_rcu(&tt_common->hash_entry);
return ret;
}
+/**
+ * batadv_transtable_search - get the mesh destination for a given client
+ * @bat_priv: the bat priv with all the soft interface information
+ * @src: mac address of the source client
+ * @addr: mac address of the destination client
+ * @vid: VLAN identifier
+ *
+ * Returns a pointer to the originator that was selected as destination in the
+ * mesh for contacting the client 'addr', NULL otherwise.
+ * In case of multiple originators serving the same client, the function returns
+ * the best one (best in terms of metric towards the destination node).
+ *
+ * If the two clients are AP isolated the function returns NULL.
+ */
struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv,
const uint8_t *src,
- const uint8_t *addr)
+ const uint8_t *addr,
+ unsigned short vid)
{
struct batadv_tt_local_entry *tt_local_entry = NULL;
struct batadv_tt_global_entry *tt_global_entry = NULL;
struct batadv_orig_node *orig_node = NULL;
struct batadv_tt_orig_list_entry *best_entry;
+ bool ap_isolation_enabled = false;
+ struct batadv_softif_vlan *vlan;
+
+ /* if the AP isolation is requested on a VLAN, then check for its
+ * setting in the proper VLAN private data structure
+ */
+ vlan = batadv_softif_vlan_get(bat_priv, vid);
+ if (vlan) {
+ ap_isolation_enabled = atomic_read(&vlan->ap_isolation);
+ batadv_softif_vlan_free_ref(vlan);
+ }
- if (src && atomic_read(&bat_priv->ap_isolation)) {
- tt_local_entry = batadv_tt_local_hash_find(bat_priv, src);
+ if (src && ap_isolation_enabled) {
+ tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid);
if (!tt_local_entry ||
(tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING))
goto out;
}
- tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr);
+ tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
if (!tt_global_entry)
goto out;
goto out;
rcu_read_lock();
- best_entry = batadv_transtable_best_orig(tt_global_entry);
+ best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry);
/* found anything? */
if (best_entry)
orig_node = best_entry->orig_node;
return orig_node;
}
-/* Calculates the checksum of the local table of a given orig_node */
-static uint16_t batadv_tt_global_crc(struct batadv_priv *bat_priv,
- struct batadv_orig_node *orig_node)
+/**
+ * batadv_tt_global_crc - calculates the checksum of the local table belonging
+ * to the given orig_node
+ * @bat_priv: the bat priv with all the soft interface information
+ * @orig_node: originator for which the CRC should be computed
+ * @vid: VLAN identifier for which the CRC32 has to be computed
+ *
+ * This function computes the checksum for the global table corresponding to a
+ * specific originator. In particular, the checksum is computed as follows: For
+ * each client connected to the originator the CRC32C of the MAC address and the
+ * VID is computed and then all the CRC32Cs of the various clients are xor'ed
+ * together.
+ *
+ * The idea behind is that CRC32C should be used as much as possible in order to
+ * produce a unique hash of the table, but since the order which is used to feed
+ * the CRC32C function affects the result and since every node in the network
+ * probably sorts the clients differently, the hash function cannot be directly
+ * computed over the entire table. Hence the CRC32C is used only on
+ * the single client entry, while all the results are then xor'ed together
+ * because the XOR operation can combine them all while trying to reduce the
+ * noise as much as possible.
+ *
+ * Returns the checksum of the global table of a given originator.
+ */
+static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv,
+ struct batadv_orig_node *orig_node,
+ unsigned short vid)
{
- uint16_t total = 0, total_one;
struct batadv_hashtable *hash = bat_priv->tt.global_hash;
struct batadv_tt_common_entry *tt_common;
struct batadv_tt_global_entry *tt_global;
struct hlist_head *head;
- uint32_t i;
- int j;
+ uint32_t i, crc_tmp, crc = 0;
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
tt_global = container_of(tt_common,
struct batadv_tt_global_entry,
common);
+ /* compute the CRC only for entries belonging to the
+ * VLAN identified by the vid passed as parameter
+ */
+ if (tt_common->vid != vid)
+ continue;
+
/* Roaming clients are in the global table for
* consistency only. They don't have to be
* taken into account while computing the
orig_node))
continue;
- total_one = 0;
- for (j = 0; j < ETH_ALEN; j++)
- total_one = crc16_byte(total_one,
- tt_common->addr[j]);
- total ^= total_one;
+ crc_tmp = crc32c(0, &tt_common->vid,
+ sizeof(tt_common->vid));
+ crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
}
rcu_read_unlock();
}
- return total;
+ return crc;
}
-/* Calculates the checksum of the local table */
-static uint16_t batadv_tt_local_crc(struct batadv_priv *bat_priv)
+/**
+ * batadv_tt_local_crc - calculates the checksum of the local table
+ * @bat_priv: the bat priv with all the soft interface information
+ * @vid: VLAN identifier for which the CRC32 has to be computed
+ *
+ * For details about the computation, please refer to the documentation for
+ * batadv_tt_global_crc().
+ *
+ * Returns the checksum of the local table
+ */
+static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv,
+ unsigned short vid)
{
- uint16_t total = 0, total_one;
struct batadv_hashtable *hash = bat_priv->tt.local_hash;
struct batadv_tt_common_entry *tt_common;
struct hlist_head *head;
- uint32_t i;
- int j;
+ uint32_t i, crc_tmp, crc = 0;
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
rcu_read_lock();
hlist_for_each_entry_rcu(tt_common, head, hash_entry) {
+ /* compute the CRC only for entries belonging to the
+ * VLAN identified by vid
+ */
+ if (tt_common->vid != vid)
+ continue;
+
/* not yet committed clients have not to be taken into
* account while computing the CRC
*/
if (tt_common->flags & BATADV_TT_CLIENT_NEW)
continue;
- total_one = 0;
- for (j = 0; j < ETH_ALEN; j++)
- total_one = crc16_byte(total_one,
- tt_common->addr[j]);
- total ^= total_one;
+
+ crc_tmp = crc32c(0, &tt_common->vid,
+ sizeof(tt_common->vid));
+ crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
}
rcu_read_unlock();
}
- return total;
+ return crc;
}
static void batadv_tt_req_list_free(struct batadv_priv *bat_priv)
static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
- const unsigned char *tt_buff,
- uint8_t tt_num_changes)
+ const void *tt_buff,
+ uint16_t tt_buff_len)
{
- uint16_t tt_buff_len = batadv_tt_len(tt_num_changes);
-
/* Replace the old buffer only if I received something in the
* last OGM (the OGM could carry no changes)
*/
return tt_req_node;
}
-/* data_ptr is useless here, but has to be kept to respect the prototype */
-static int batadv_tt_local_valid_entry(const void *entry_ptr,
- const void *data_ptr)
+/**
+ * batadv_tt_local_valid - verify that given tt entry is a valid one
+ * @entry_ptr: to be checked local tt entry
+ * @data_ptr: not used but definition required to satisfy the callback prototype
+ *
+ * Returns 1 if the entry is a valid, 0 otherwise.
+ */
+static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr)
{
const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node);
}
-static struct sk_buff *
-batadv_tt_response_fill_table(uint16_t tt_len, uint8_t ttvn,
- struct batadv_hashtable *hash,
- struct batadv_priv *bat_priv,
- int (*valid_cb)(const void *, const void *),
- void *cb_data)
+/**
+ * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the
+ * specified tt hash
+ * @bat_priv: the bat priv with all the soft interface information
+ * @hash: hash table containing the tt entries
+ * @tt_len: expected tvlv tt data buffer length in number of bytes
+ * @tvlv_buff: pointer to the buffer to fill with the TT data
+ * @valid_cb: function to filter tt change entries
+ * @cb_data: data passed to the filter function as argument
+ */
+static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
+ struct batadv_hashtable *hash,
+ void *tvlv_buff, uint16_t tt_len,
+ int (*valid_cb)(const void *, const void *),
+ void *cb_data)
{
struct batadv_tt_common_entry *tt_common_entry;
- struct batadv_tt_query_packet *tt_response;
- struct batadv_tt_change *tt_change;
+ struct batadv_tvlv_tt_change *tt_change;
struct hlist_head *head;
- struct sk_buff *skb = NULL;
- uint16_t tt_tot, tt_count;
- ssize_t tt_query_size = sizeof(struct batadv_tt_query_packet);
+ uint16_t tt_tot, tt_num_entries = 0;
uint32_t i;
- size_t len;
-
- if (tt_query_size + tt_len > bat_priv->soft_iface->mtu) {
- tt_len = bat_priv->soft_iface->mtu - tt_query_size;
- tt_len -= tt_len % sizeof(struct batadv_tt_change);
- }
- tt_tot = tt_len / sizeof(struct batadv_tt_change);
- len = tt_query_size + tt_len;
- skb = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN);
- if (!skb)
- goto out;
-
- skb->priority = TC_PRIO_CONTROL;
- skb_reserve(skb, ETH_HLEN);
- tt_response = (struct batadv_tt_query_packet *)skb_put(skb, len);
- tt_response->ttvn = ttvn;
-
- tt_change = (struct batadv_tt_change *)(skb->data + tt_query_size);
- tt_count = 0;
+ tt_tot = batadv_tt_entries(tt_len);
+ tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;
rcu_read_lock();
for (i = 0; i < hash->size; i++) {
hlist_for_each_entry_rcu(tt_common_entry,
head, hash_entry) {
- if (tt_count == tt_tot)
+ if (tt_tot == tt_num_entries)
break;
if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data)))
memcpy(tt_change->addr, tt_common_entry->addr,
ETH_ALEN);
tt_change->flags = tt_common_entry->flags;
+ tt_change->vid = htons(tt_common_entry->vid);
+ tt_change->reserved = 0;
- tt_count++;
+ tt_num_entries++;
tt_change++;
}
}
rcu_read_unlock();
+}
- /* store in the message the number of entries we have successfully
- * copied
- */
- tt_response->tt_data = htons(tt_count);
+/**
+ * batadv_tt_global_check_crc - check if all the CRCs are correct
+ * @orig_node: originator for which the CRCs have to be checked
+ * @tt_vlan: pointer to the first tvlv VLAN entry
+ * @num_vlan: number of tvlv VLAN entries
+ * @create: if true, create VLAN objects if not found
+ *
+ * Return true if all the received CRCs match the locally stored ones, false
+ * otherwise
+ */
+static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node,
+ struct batadv_tvlv_tt_vlan_data *tt_vlan,
+ uint16_t num_vlan)
+{
+ struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp;
+ struct batadv_orig_node_vlan *vlan;
+ int i;
-out:
- return skb;
+ /* check if each received CRC matches the locally stored one */
+ for (i = 0; i < num_vlan; i++) {
+ tt_vlan_tmp = tt_vlan + i;
+
+ /* if orig_node is a backbone node for this VLAN, don't check
+ * the CRC as we ignore all the global entries over it
+ */
+ if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv,
+ orig_node->orig,
+ ntohs(tt_vlan_tmp->vid)))
+ continue;
+
+ vlan = batadv_orig_node_vlan_get(orig_node,
+ ntohs(tt_vlan_tmp->vid));
+ if (!vlan)
+ return false;
+
+ if (vlan->tt.crc != ntohl(tt_vlan_tmp->crc))
+ return false;
+ }
+
+ return true;
}
+/**
+ * batadv_tt_local_update_crc - update all the local CRCs
+ * @bat_priv: the bat priv with all the soft interface information
+ */
+static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv)
+{
+ struct batadv_softif_vlan *vlan;
+
+ /* recompute the global CRC for each VLAN */
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
+ vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid);
+ }
+ rcu_read_unlock();
+}
+
+/**
+ * batadv_tt_global_update_crc - update all the global CRCs for this orig_node
+ * @bat_priv: the bat priv with all the soft interface information
+ * @orig_node: the orig_node for which the CRCs have to be updated
+ */
+static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv,
+ struct batadv_orig_node *orig_node)
+{
+ struct batadv_orig_node_vlan *vlan;
+ uint32_t crc;
+
+ /* recompute the global CRC for each VLAN */
+ rcu_read_lock();
+ list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
+ /* if orig_node is a backbone node for this VLAN, don't compute
+ * the CRC as we ignore all the global entries over it
+ */
+ if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig,
+ vlan->vid))
+ continue;
+
+ crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid);
+ vlan->tt.crc = crc;
+ }
+ rcu_read_unlock();
+}
+
+/**
+ * batadv_send_tt_request - send a TT Request message to a given node
+ * @bat_priv: the bat priv with all the soft interface information
+ * @dst_orig_node: the destination of the message
+ * @ttvn: the version number that the source of the message is looking for
+ * @tt_vlan: pointer to the first tvlv VLAN object to request
+ * @num_vlan: number of tvlv VLAN entries
+ * @full_table: ask for the entire translation table if true, while only for the
+ * last TT diff otherwise
+ */
static int batadv_send_tt_request(struct batadv_priv *bat_priv,
struct batadv_orig_node *dst_orig_node,
- uint8_t ttvn, uint16_t tt_crc,
- bool full_table)
+ uint8_t ttvn,
+ struct batadv_tvlv_tt_vlan_data *tt_vlan,
+ uint16_t num_vlan, bool full_table)
{
- struct sk_buff *skb = NULL;
- struct batadv_tt_query_packet *tt_request;
- struct batadv_hard_iface *primary_if;
+ struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
struct batadv_tt_req_node *tt_req_node = NULL;
- int ret = 1;
- size_t tt_req_len;
+ struct batadv_tvlv_tt_vlan_data *tt_vlan_req;
+ struct batadv_hard_iface *primary_if;
+ bool ret = false;
+ int i, size;
primary_if = batadv_primary_if_get_selected(bat_priv);
if (!primary_if)
if (!tt_req_node)
goto out;
- skb = netdev_alloc_skb_ip_align(NULL, sizeof(*tt_request) + ETH_HLEN);
- if (!skb)
+ size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan;
+ tvlv_tt_data = kzalloc(size, GFP_ATOMIC);
+ if (!tvlv_tt_data)
goto out;
- skb->priority = TC_PRIO_CONTROL;
- skb_reserve(skb, ETH_HLEN);
+ tvlv_tt_data->flags = BATADV_TT_REQUEST;
+ tvlv_tt_data->ttvn = ttvn;
+ tvlv_tt_data->num_vlan = htons(num_vlan);
- tt_req_len = sizeof(*tt_request);
- tt_request = (struct batadv_tt_query_packet *)skb_put(skb, tt_req_len);
+ /* send all the CRCs within the request. This is needed by intermediate
+ * nodes to ensure they have the correct table before replying
+ */
+ tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1);
+ for (i = 0; i < num_vlan; i++) {
+ tt_vlan_req->vid = tt_vlan->vid;
+ tt_vlan_req->crc = tt_vlan->crc;
- tt_request->header.packet_type = BATADV_TT_QUERY;
- tt_request->header.version = BATADV_COMPAT_VERSION;
- memcpy(tt_request->src, primary_if->net_dev->dev_addr, ETH_ALEN);
- memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN);
- tt_request->header.ttl = BATADV_TTL;
- tt_request->ttvn = ttvn;
- tt_request->tt_data = htons(tt_crc);
- tt_request->flags = BATADV_TT_REQUEST;
+ tt_vlan_req++;
+ tt_vlan++;
+ }
if (full_table)
- tt_request->flags |= BATADV_TT_FULL_TABLE;
+ tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n",
- dst_orig_node->orig, (full_table ? 'F' : '.'));
+ dst_orig_node->orig, full_table ? 'F' : '.');
batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX);
-
- if (batadv_send_skb_to_orig(skb, dst_orig_node, NULL) != NET_XMIT_DROP)
- ret = 0;
+ batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
+ dst_orig_node->orig, BATADV_TVLV_TT, 1,
+ tvlv_tt_data, size);
+ ret = true;
out:
if (primary_if)
batadv_hardif_free_ref(primary_if);
- if (ret)
- kfree_skb(skb);
if (ret && tt_req_node) {
spin_lock_bh(&bat_priv->tt.req_list_lock);
list_del(&tt_req_node->list);
spin_unlock_bh(&bat_priv->tt.req_list_lock);
kfree(tt_req_node);
}
+ kfree(tvlv_tt_data);
return ret;
}
-static bool
-batadv_send_other_tt_response(struct batadv_priv *bat_priv,
- struct batadv_tt_query_packet *tt_request)
+/**
+ * batadv_send_other_tt_response - send reply to tt request concerning another
+ * node's translation table
+ * @bat_priv: the bat priv with all the soft interface information
+ * @tt_data: tt data containing the tt request information
+ * @req_src: mac address of tt request sender
+ * @req_dst: mac address of tt request recipient
+ *
+ * Returns true if tt request reply was sent, false otherwise.
+ */
+static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv,
+ struct batadv_tvlv_tt_data *tt_data,
+ uint8_t *req_src, uint8_t *req_dst)
{
struct batadv_orig_node *req_dst_orig_node;
struct batadv_orig_node *res_dst_orig_node = NULL;
- uint8_t orig_ttvn, req_ttvn, ttvn;
- int res, ret = false;
- unsigned char *tt_buff;
- bool full_table;
- uint16_t tt_len, tt_tot;
- struct sk_buff *skb = NULL;
- struct batadv_tt_query_packet *tt_response;
- uint8_t *packet_pos;
- size_t len;
+ struct batadv_tvlv_tt_change *tt_change;
+ struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
+ struct batadv_tvlv_tt_vlan_data *tt_vlan;
+ bool ret = false, full_table;
+ uint8_t orig_ttvn, req_ttvn;
+ uint16_t tvlv_len;
+ int32_t tt_len;
batadv_dbg(BATADV_DBG_TT, bat_priv,
"Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n",
- tt_request->src, tt_request->ttvn, tt_request->dst,
- (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
+ req_src, tt_data->ttvn, req_dst,
+ (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
/* Let's get the orig node of the REAL destination */
- req_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->dst);
+ req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst);
if (!req_dst_orig_node)
goto out;
- res_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->src);
+ res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src);
if (!res_dst_orig_node)
goto out;
orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn);
- req_ttvn = tt_request->ttvn;
+ req_ttvn = tt_data->ttvn;
- /* I don't have the requested data */
+ tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
+ /* this node doesn't have the requested data */
if (orig_ttvn != req_ttvn ||
- tt_request->tt_data != htons(req_dst_orig_node->tt_crc))
+ !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan,
+ ntohs(tt_data->num_vlan)))
goto out;
/* If the full table has been explicitly requested */
- if (tt_request->flags & BATADV_TT_FULL_TABLE ||
+ if (tt_data->flags & BATADV_TT_FULL_TABLE ||
!req_dst_orig_node->tt_buff)
full_table = true;
else
full_table = false;
- /* In this version, fragmentation is not implemented, then
- * I'll send only one packet with as much TT entries as I can
+ /* TT fragmentation hasn't been implemented yet, so send as many
+ * TT entries fit a single packet as possible only
*/
if (!full_table) {
spin_lock_bh(&req_dst_orig_node->tt_buff_lock);
tt_len = req_dst_orig_node->tt_buff_len;
- tt_tot = tt_len / sizeof(struct batadv_tt_change);
- len = sizeof(*tt_response) + tt_len;
- skb = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN);
- if (!skb)
+ tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
+ &tvlv_tt_data,
+ &tt_change,
+ &tt_len);
+ if (!tt_len)
goto unlock;
- skb->priority = TC_PRIO_CONTROL;
- skb_reserve(skb, ETH_HLEN);
- packet_pos = skb_put(skb, len);
- tt_response = (struct batadv_tt_query_packet *)packet_pos;
- tt_response->ttvn = req_ttvn;
- tt_response->tt_data = htons(tt_tot);
-
- tt_buff = skb->data + sizeof(*tt_response);
/* Copy the last orig_node's OGM buffer */
- memcpy(tt_buff, req_dst_orig_node->tt_buff,
+ memcpy(tt_change, req_dst_orig_node->tt_buff,
req_dst_orig_node->tt_buff_len);
-
spin_unlock_bh(&req_dst_orig_node->tt_buff_lock);
} else {
- tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size);
- tt_len *= sizeof(struct batadv_tt_change);
- ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn);
-
- skb = batadv_tt_response_fill_table(tt_len, ttvn,
- bat_priv->tt.global_hash,
- bat_priv,
- batadv_tt_global_valid,
- req_dst_orig_node);
- if (!skb)
+ /* allocate the tvlv, put the tt_data and all the tt_vlan_data
+ * in the initial part
+ */
+ tt_len = -1;
+ tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
+ &tvlv_tt_data,
+ &tt_change,
+ &tt_len);
+ if (!tt_len)
goto out;
- tt_response = (struct batadv_tt_query_packet *)skb->data;
+ /* fill the rest of the tvlv with the real TT entries */
+ batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash,
+ tt_change, tt_len,
+ batadv_tt_global_valid,
+ req_dst_orig_node);
+ }
+
+ /* Don't send the response, if larger than fragmented packet. */
+ tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len;
+ if (tt_len > atomic_read(&bat_priv->packet_size_max)) {
+ net_ratelimited_function(batadv_info, bat_priv->soft_iface,
+ "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n",
+ res_dst_orig_node->orig);
+ goto out;
}
- tt_response->header.packet_type = BATADV_TT_QUERY;
- tt_response->header.version = BATADV_COMPAT_VERSION;
- tt_response->header.ttl = BATADV_TTL;
- memcpy(tt_response->src, req_dst_orig_node->orig, ETH_ALEN);
- memcpy(tt_response->dst, tt_request->src, ETH_ALEN);
- tt_response->flags = BATADV_TT_RESPONSE;
+ tvlv_tt_data->flags = BATADV_TT_RESPONSE;
+ tvlv_tt_data->ttvn = req_ttvn;
if (full_table)
- tt_response->flags |= BATADV_TT_FULL_TABLE;
+ tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Sending TT_RESPONSE %pM for %pM (ttvn: %u)\n",
- res_dst_orig_node->orig, req_dst_orig_node->orig, req_ttvn);
+ "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n",
+ res_dst_orig_node->orig, req_dst_orig_node->orig,
+ full_table ? 'F' : '.', req_ttvn);
batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
- res = batadv_send_skb_to_orig(skb, res_dst_orig_node, NULL);
- if (res != NET_XMIT_DROP)
- ret = true;
+ batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig,
+ req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
+ tvlv_len);
+ ret = true;
goto out;
unlock:
batadv_orig_node_free_ref(res_dst_orig_node);
if (req_dst_orig_node)
batadv_orig_node_free_ref(req_dst_orig_node);
- if (!ret)
- kfree_skb(skb);
+ kfree(tvlv_tt_data);
return ret;
}
-static bool
-batadv_send_my_tt_response(struct batadv_priv *bat_priv,
- struct batadv_tt_query_packet *tt_request)
+/**
+ * batadv_send_my_tt_response - send reply to tt request concerning this node's
+ * translation table
+ * @bat_priv: the bat priv with all the soft interface information
+ * @tt_data: tt data containing the tt request information
+ * @req_src: mac address of tt request sender
+ *
+ * Returns true if tt request reply was sent, false otherwise.
+ */
+static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv,
+ struct batadv_tvlv_tt_data *tt_data,
+ uint8_t *req_src)
{
- struct batadv_orig_node *orig_node;
+ struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
struct batadv_hard_iface *primary_if = NULL;
- uint8_t my_ttvn, req_ttvn, ttvn;
- int ret = false;
- unsigned char *tt_buff;
+ struct batadv_tvlv_tt_change *tt_change;
+ struct batadv_orig_node *orig_node;
+ uint8_t my_ttvn, req_ttvn;
+ uint16_t tvlv_len;
bool full_table;
- uint16_t tt_len, tt_tot;
- struct sk_buff *skb = NULL;
- struct batadv_tt_query_packet *tt_response;
- uint8_t *packet_pos;
- size_t len;
+ int32_t tt_len;
batadv_dbg(BATADV_DBG_TT, bat_priv,
"Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
- tt_request->src, tt_request->ttvn,
- (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
+ req_src, tt_data->ttvn,
+ (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
+ spin_lock_bh(&bat_priv->tt.commit_lock);
my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn);
- req_ttvn = tt_request->ttvn;
+ req_ttvn = tt_data->ttvn;
- orig_node = batadv_orig_hash_find(bat_priv, tt_request->src);
+ orig_node = batadv_orig_hash_find(bat_priv, req_src);
if (!orig_node)
goto out;
/* If the full table has been explicitly requested or the gap
* is too big send the whole local translation table
*/
- if (tt_request->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn ||
+ if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn ||
!bat_priv->tt.last_changeset)
full_table = true;
else
full_table = false;
- /* In this version, fragmentation is not implemented, then
- * I'll send only one packet with as much TT entries as I can
+ /* TT fragmentation hasn't been implemented yet, so send as many
+ * TT entries fit a single packet as possible only
*/
if (!full_table) {
spin_lock_bh(&bat_priv->tt.last_changeset_lock);
- tt_len = bat_priv->tt.last_changeset_len;
- tt_tot = tt_len / sizeof(struct batadv_tt_change);
- len = sizeof(*tt_response) + tt_len;
- skb = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN);
- if (!skb)
+ tt_len = bat_priv->tt.last_changeset_len;
+ tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
+ &tvlv_tt_data,
+ &tt_change,
+ &tt_len);
+ if (!tt_len)
goto unlock;
- skb->priority = TC_PRIO_CONTROL;
- skb_reserve(skb, ETH_HLEN);
- packet_pos = skb_put(skb, len);
- tt_response = (struct batadv_tt_query_packet *)packet_pos;
- tt_response->ttvn = req_ttvn;
- tt_response->tt_data = htons(tt_tot);
-
- tt_buff = skb->data + sizeof(*tt_response);
- memcpy(tt_buff, bat_priv->tt.last_changeset,
+ /* Copy the last orig_node's OGM buffer */
+ memcpy(tt_change, bat_priv->tt.last_changeset,
bat_priv->tt.last_changeset_len);
spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
} else {
- tt_len = (uint16_t)atomic_read(&bat_priv->tt.local_entry_num);
- tt_len *= sizeof(struct batadv_tt_change);
- ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn);
-
- skb = batadv_tt_response_fill_table(tt_len, ttvn,
- bat_priv->tt.local_hash,
- bat_priv,
- batadv_tt_local_valid_entry,
- NULL);
- if (!skb)
+ req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn);
+
+ /* allocate the tvlv, put the tt_data and all the tt_vlan_data
+ * in the initial part
+ */
+ tt_len = -1;
+ tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv,
+ &tvlv_tt_data,
+ &tt_change,
+ &tt_len);
+ if (!tt_len)
goto out;
- tt_response = (struct batadv_tt_query_packet *)skb->data;
+ /* fill the rest of the tvlv with the real TT entries */
+ batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash,
+ tt_change, tt_len,
+ batadv_tt_local_valid, NULL);
}
- tt_response->header.packet_type = BATADV_TT_QUERY;
- tt_response->header.version = BATADV_COMPAT_VERSION;
- tt_response->header.ttl = BATADV_TTL;
- memcpy(tt_response->src, primary_if->net_dev->dev_addr, ETH_ALEN);
- memcpy(tt_response->dst, tt_request->src, ETH_ALEN);
- tt_response->flags = BATADV_TT_RESPONSE;
+ tvlv_tt_data->flags = BATADV_TT_RESPONSE;
+ tvlv_tt_data->ttvn = req_ttvn;
if (full_table)
- tt_response->flags |= BATADV_TT_FULL_TABLE;
+ tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Sending TT_RESPONSE to %pM [%c]\n",
- orig_node->orig,
- (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
+ "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n",
+ orig_node->orig, full_table ? 'F' : '.', req_ttvn);
batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
- if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP)
- ret = true;
+ batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
+ req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
+ tvlv_len);
+
goto out;
unlock:
spin_unlock_bh(&bat_priv->tt.last_changeset_lock);
out:
+ spin_unlock_bh(&bat_priv->tt.commit_lock);
if (orig_node)
batadv_orig_node_free_ref(orig_node);
if (primary_if)
batadv_hardif_free_ref(primary_if);
- if (!ret)
- kfree_skb(skb);
- /* This packet was for me, so it doesn't need to be re-routed */
+ kfree(tvlv_tt_data);
+ /* The packet was for this host, so it doesn't need to be re-routed */
return true;
}
-bool batadv_send_tt_response(struct batadv_priv *bat_priv,
- struct batadv_tt_query_packet *tt_request)
+/**
+ * batadv_send_tt_response - send reply to tt request
+ * @bat_priv: the bat priv with all the soft interface information
+ * @tt_data: tt data containing the tt request information
+ * @req_src: mac address of tt request sender
+ * @req_dst: mac address of tt request recipient
+ *
+ * Returns true if tt request reply was sent, false otherwise.
+ */
+static bool batadv_send_tt_response(struct batadv_priv *bat_priv,
+ struct batadv_tvlv_tt_data *tt_data,
+ uint8_t *req_src, uint8_t *req_dst)
{
- if (batadv_is_my_mac(bat_priv, tt_request->dst)) {
- /* don't answer backbone gws! */
- if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_request->src))
- return true;
-
- return batadv_send_my_tt_response(bat_priv, tt_request);
- } else {
- return batadv_send_other_tt_response(bat_priv, tt_request);
- }
+ if (batadv_is_my_mac(bat_priv, req_dst))
+ return batadv_send_my_tt_response(bat_priv, tt_data, req_src);
+ else
+ return batadv_send_other_tt_response(bat_priv, tt_data,
+ req_src, req_dst);
}
static void _batadv_tt_update_changes(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
- struct batadv_tt_change *tt_change,
+ struct batadv_tvlv_tt_change *tt_change,
uint16_t tt_num_changes, uint8_t ttvn)
{
int i;
roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM;
batadv_tt_global_del(bat_priv, orig_node,
(tt_change + i)->addr,
+ ntohs((tt_change + i)->vid),
"tt removed by changes",
roams);
} else {
if (!batadv_tt_global_add(bat_priv, orig_node,
(tt_change + i)->addr,
+ ntohs((tt_change + i)->vid),
(tt_change + i)->flags, ttvn))
/* In case of problem while storing a
* global_entry, we stop the updating
}
static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv,
- struct batadv_tt_query_packet *tt_response)
+ struct batadv_tvlv_tt_change *tt_change,
+ uint8_t ttvn, uint8_t *resp_src,
+ uint16_t num_entries)
{
struct batadv_orig_node *orig_node;
- orig_node = batadv_orig_hash_find(bat_priv, tt_response->src);
+ orig_node = batadv_orig_hash_find(bat_priv, resp_src);
if (!orig_node)
goto out;
/* Purge the old table first.. */
- batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table");
+ batadv_tt_global_del_orig(bat_priv, orig_node, -1,
+ "Received full table");
- _batadv_tt_update_changes(bat_priv, orig_node,
- (struct batadv_tt_change *)(tt_response + 1),
- ntohs(tt_response->tt_data),
- tt_response->ttvn);
+ _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries,
+ ttvn);
spin_lock_bh(&orig_node->tt_buff_lock);
kfree(orig_node->tt_buff);
orig_node->tt_buff = NULL;
spin_unlock_bh(&orig_node->tt_buff_lock);
- atomic_set(&orig_node->last_ttvn, tt_response->ttvn);
+ atomic_set(&orig_node->last_ttvn, ttvn);
out:
if (orig_node)
static void batadv_tt_update_changes(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
uint16_t tt_num_changes, uint8_t ttvn,
- struct batadv_tt_change *tt_change)
+ struct batadv_tvlv_tt_change *tt_change)
{
_batadv_tt_update_changes(bat_priv, orig_node, tt_change,
tt_num_changes, ttvn);
- batadv_tt_save_orig_buffer(bat_priv, orig_node,
- (unsigned char *)tt_change, tt_num_changes);
+ batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change,
+ batadv_tt_len(tt_num_changes));
atomic_set(&orig_node->last_ttvn, ttvn);
}
-bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr)
+/**
+ * batadv_is_my_client - check if a client is served by the local node
+ * @bat_priv: the bat priv with all the soft interface information
+ * @addr: the mac adress of the client to check
+ * @vid: VLAN identifier
+ *
+ * Returns true if the client is served by this node, false otherwise.
+ */
+bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr,
+ unsigned short vid)
{
struct batadv_tt_local_entry *tt_local_entry;
bool ret = false;
- tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr);
+ tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
if (!tt_local_entry)
goto out;
/* Check if the client has been logically deleted (but is kept for
return ret;
}
-void batadv_handle_tt_response(struct batadv_priv *bat_priv,
- struct batadv_tt_query_packet *tt_response)
+/**
+ * batadv_handle_tt_response - process incoming tt reply
+ * @bat_priv: the bat priv with all the soft interface information
+ * @tt_data: tt data containing the tt request information
+ * @resp_src: mac address of tt reply sender
+ * @num_entries: number of tt change entries appended to the tt data
+ */
+static void batadv_handle_tt_response(struct batadv_priv *bat_priv,
+ struct batadv_tvlv_tt_data *tt_data,
+ uint8_t *resp_src, uint16_t num_entries)
{
struct batadv_tt_req_node *node, *safe;
struct batadv_orig_node *orig_node = NULL;
- struct batadv_tt_change *tt_change;
+ struct batadv_tvlv_tt_change *tt_change;
+ uint8_t *tvlv_ptr = (uint8_t *)tt_data;
+ uint16_t change_offset;
batadv_dbg(BATADV_DBG_TT, bat_priv,
"Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
- tt_response->src, tt_response->ttvn,
- ntohs(tt_response->tt_data),
- (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
+ resp_src, tt_data->ttvn, num_entries,
+ (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
- /* we should have never asked a backbone gw */
- if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_response->src))
- goto out;
-
- orig_node = batadv_orig_hash_find(bat_priv, tt_response->src);
+ orig_node = batadv_orig_hash_find(bat_priv, resp_src);
if (!orig_node)
goto out;
- if (tt_response->flags & BATADV_TT_FULL_TABLE) {
- batadv_tt_fill_gtable(bat_priv, tt_response);
+ spin_lock_bh(&orig_node->tt_lock);
+
+ change_offset = sizeof(struct batadv_tvlv_tt_vlan_data);
+ change_offset *= ntohs(tt_data->num_vlan);
+ change_offset += sizeof(*tt_data);
+ tvlv_ptr += change_offset;
+
+ tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr;
+ if (tt_data->flags & BATADV_TT_FULL_TABLE) {
+ batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn,
+ resp_src, num_entries);
} else {
- tt_change = (struct batadv_tt_change *)(tt_response + 1);
- batadv_tt_update_changes(bat_priv, orig_node,
- ntohs(tt_response->tt_data),
- tt_response->ttvn, tt_change);
+ batadv_tt_update_changes(bat_priv, orig_node, num_entries,
+ tt_data->ttvn, tt_change);
}
+ /* Recalculate the CRC for this orig_node and store it */
+ batadv_tt_global_update_crc(bat_priv, orig_node);
+
+ spin_unlock_bh(&orig_node->tt_lock);
+
/* Delete the tt_req_node from pending tt_requests list */
spin_lock_bh(&bat_priv->tt.req_list_lock);
list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) {
- if (!batadv_compare_eth(node->addr, tt_response->src))
+ if (!batadv_compare_eth(node->addr, resp_src))
continue;
list_del(&node->list);
kfree(node);
}
- spin_unlock_bh(&bat_priv->tt.req_list_lock);
- /* Recalculate the CRC for this orig_node and store it */
- orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node);
+ spin_unlock_bh(&bat_priv->tt.req_list_lock);
out:
if (orig_node)
batadv_orig_node_free_ref(orig_node);
}
-int batadv_tt_init(struct batadv_priv *bat_priv)
-{
- int ret;
-
- ret = batadv_tt_local_init(bat_priv);
- if (ret < 0)
- return ret;
-
- ret = batadv_tt_global_init(bat_priv);
- if (ret < 0)
- return ret;
-
- INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge);
- queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
- msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
-
- return 1;
-}
-
static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv)
{
struct batadv_tt_roam_node *node, *safe;
return ret;
}
+/**
+ * batadv_send_roam_adv - send a roaming advertisement message
+ * @bat_priv: the bat priv with all the soft interface information
+ * @client: mac address of the roaming client
+ * @vid: VLAN identifier
+ * @orig_node: message destination
+ *
+ * Send a ROAMING_ADV message to the node which was previously serving this
+ * client. This is done to inform the node that from now on all traffic destined
+ * for this particular roamed client has to be forwarded to the sender of the
+ * roaming message.
+ */
static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client,
+ unsigned short vid,
struct batadv_orig_node *orig_node)
{
- struct sk_buff *skb = NULL;
- struct batadv_roam_adv_packet *roam_adv_packet;
- int ret = 1;
struct batadv_hard_iface *primary_if;
- size_t len = sizeof(*roam_adv_packet);
+ struct batadv_tvlv_roam_adv tvlv_roam;
+
+ primary_if = batadv_primary_if_get_selected(bat_priv);
+ if (!primary_if)
+ goto out;
/* before going on we have to check whether the client has
* already roamed to us too many times
if (!batadv_tt_check_roam_count(bat_priv, client))
goto out;
- skb = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN);
- if (!skb)
- goto out;
-
- skb->priority = TC_PRIO_CONTROL;
- skb_reserve(skb, ETH_HLEN);
-
- roam_adv_packet = (struct batadv_roam_adv_packet *)skb_put(skb, len);
-
- roam_adv_packet->header.packet_type = BATADV_ROAM_ADV;
- roam_adv_packet->header.version = BATADV_COMPAT_VERSION;
- roam_adv_packet->header.ttl = BATADV_TTL;
- roam_adv_packet->reserved = 0;
- primary_if = batadv_primary_if_get_selected(bat_priv);
- if (!primary_if)
- goto out;
- memcpy(roam_adv_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN);
- batadv_hardif_free_ref(primary_if);
- memcpy(roam_adv_packet->dst, orig_node->orig, ETH_ALEN);
- memcpy(roam_adv_packet->client, client, ETH_ALEN);
-
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Sending ROAMING_ADV to %pM (client %pM)\n",
- orig_node->orig, client);
+ "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n",
+ orig_node->orig, client, BATADV_PRINT_VID(vid));
batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX);
- if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP)
- ret = 0;
+ memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client));
+ tvlv_roam.vid = htons(vid);
+
+ batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
+ orig_node->orig, BATADV_TVLV_ROAM, 1,
+ &tvlv_roam, sizeof(tvlv_roam));
out:
- if (ret && skb)
- kfree_skb(skb);
- return;
+ if (primary_if)
+ batadv_hardif_free_ref(primary_if);
}
static void batadv_tt_purge(struct work_struct *work)
priv_tt = container_of(delayed_work, struct batadv_priv_tt, work);
bat_priv = container_of(priv_tt, struct batadv_priv, tt);
- batadv_tt_local_purge(bat_priv);
+ batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT);
batadv_tt_global_purge(bat_priv);
batadv_tt_req_purge(bat_priv);
batadv_tt_roam_purge(bat_priv);
void batadv_tt_free(struct batadv_priv *bat_priv)
{
+ batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1);
+ batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1);
+
cancel_delayed_work_sync(&bat_priv->tt.work);
batadv_tt_local_table_free(bat_priv);
kfree(bat_priv->tt.last_changeset);
}
-/* This function will enable or disable the specified flags for all the entries
- * in the given hash table and returns the number of modified entries
+/**
+ * batadv_tt_local_set_flags - set or unset the specified flags on the local
+ * table and possibly count them in the TT size
+ * @bat_priv: the bat priv with all the soft interface information
+ * @flags: the flag to switch
+ * @enable: whether to set or unset the flag
+ * @count: whether to increase the TT size by the number of changed entries
*/
-static uint16_t batadv_tt_set_flags(struct batadv_hashtable *hash,
- uint16_t flags, bool enable)
+static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv,
+ uint16_t flags, bool enable, bool count)
{
- uint32_t i;
+ struct batadv_hashtable *hash = bat_priv->tt.local_hash;
+ struct batadv_tt_common_entry *tt_common_entry;
uint16_t changed_num = 0;
struct hlist_head *head;
- struct batadv_tt_common_entry *tt_common_entry;
+ uint32_t i;
if (!hash)
- goto out;
+ return;
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
tt_common_entry->flags &= ~flags;
}
changed_num++;
+
+ if (!count)
+ continue;
+
+ batadv_tt_local_size_inc(bat_priv,
+ tt_common_entry->vid);
}
rcu_read_unlock();
}
-out:
- return changed_num;
}
/* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */
continue;
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Deleting local tt entry (%pM): pending\n",
- tt_common->addr);
+ "Deleting local tt entry (%pM, vid: %d): pending\n",
+ tt_common->addr,
+ BATADV_PRINT_VID(tt_common->vid));
- atomic_dec(&bat_priv->tt.local_entry_num);
+ batadv_tt_local_size_dec(bat_priv, tt_common->vid);
hlist_del_rcu(&tt_common->hash_entry);
tt_local = container_of(tt_common,
struct batadv_tt_local_entry,
}
}
-static int batadv_tt_commit_changes(struct batadv_priv *bat_priv,
- unsigned char **packet_buff,
- int *packet_buff_len, int packet_min_len)
+/**
+ * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes
+ * which have been queued in the time since the last commit
+ * @bat_priv: the bat priv with all the soft interface information
+ *
+ * Caller must hold tt->commit_lock.
+ */
+static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv)
{
- uint16_t changed_num = 0;
-
- if (atomic_read(&bat_priv->tt.local_changes) < 1)
- return -ENOENT;
+ if (atomic_read(&bat_priv->tt.local_changes) < 1) {
+ if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))
+ batadv_tt_tvlv_container_update(bat_priv);
+ return;
+ }
- changed_num = batadv_tt_set_flags(bat_priv->tt.local_hash,
- BATADV_TT_CLIENT_NEW, false);
+ batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true);
- /* all reset entries have to be counted as local entries */
- atomic_add(changed_num, &bat_priv->tt.local_entry_num);
batadv_tt_local_purge_pending_clients(bat_priv);
- bat_priv->tt.local_crc = batadv_tt_local_crc(bat_priv);
+ batadv_tt_local_update_crc(bat_priv);
/* Increment the TTVN only once per OGM interval */
atomic_inc(&bat_priv->tt.vn);
/* reset the sending counter */
atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX);
-
- return batadv_tt_changes_fill_buff(bat_priv, packet_buff,
- packet_buff_len, packet_min_len);
+ batadv_tt_tvlv_container_update(bat_priv);
}
-/* when calling this function (hard_iface == primary_if) has to be true */
-int batadv_tt_append_diff(struct batadv_priv *bat_priv,
- unsigned char **packet_buff, int *packet_buff_len,
- int packet_min_len)
+/**
+ * batadv_tt_local_commit_changes - commit all pending local tt changes which
+ * have been queued in the time since the last commit
+ * @bat_priv: the bat priv with all the soft interface information
+ */
+void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv)
{
- int tt_num_changes;
-
- /* if at least one change happened */
- tt_num_changes = batadv_tt_commit_changes(bat_priv, packet_buff,
- packet_buff_len,
- packet_min_len);
-
- /* if the changes have been sent often enough */
- if ((tt_num_changes < 0) &&
- (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))) {
- batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len,
- packet_min_len, packet_min_len);
- tt_num_changes = 0;
- }
-
- return tt_num_changes;
+ spin_lock_bh(&bat_priv->tt.commit_lock);
+ batadv_tt_local_commit_changes_nolock(bat_priv);
+ spin_unlock_bh(&bat_priv->tt.commit_lock);
}
bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src,
- uint8_t *dst)
+ uint8_t *dst, unsigned short vid)
{
struct batadv_tt_local_entry *tt_local_entry = NULL;
struct batadv_tt_global_entry *tt_global_entry = NULL;
+ struct batadv_softif_vlan *vlan;
bool ret = false;
- if (!atomic_read(&bat_priv->ap_isolation))
+ vlan = batadv_softif_vlan_get(bat_priv, vid);
+ if (!vlan || !atomic_read(&vlan->ap_isolation))
goto out;
- tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst);
+ tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid);
if (!tt_local_entry)
goto out;
- tt_global_entry = batadv_tt_global_hash_find(bat_priv, src);
+ tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid);
if (!tt_global_entry)
goto out;
ret = true;
out:
+ if (vlan)
+ batadv_softif_vlan_free_ref(vlan);
if (tt_global_entry)
batadv_tt_global_entry_free_ref(tt_global_entry);
if (tt_local_entry)
return ret;
}
-void batadv_tt_update_orig(struct batadv_priv *bat_priv,
- struct batadv_orig_node *orig_node,
- const unsigned char *tt_buff, uint8_t tt_num_changes,
- uint8_t ttvn, uint16_t tt_crc)
+/**
+ * batadv_tt_update_orig - update global translation table with new tt
+ * information received via ogms
+ * @bat_priv: the bat priv with all the soft interface information
+ * @orig: the orig_node of the ogm
+ * @tt_vlan: pointer to the first tvlv VLAN entry
+ * @tt_num_vlan: number of tvlv VLAN entries
+ * @tt_change: pointer to the first entry in the TT buffer
+ * @tt_num_changes: number of tt changes inside the tt buffer
+ * @ttvn: translation table version number of this changeset
+ * @tt_crc: crc32 checksum of orig node's translation table
+ */
+static void batadv_tt_update_orig(struct batadv_priv *bat_priv,
+ struct batadv_orig_node *orig_node,
+ const void *tt_buff, uint16_t tt_num_vlan,
+ struct batadv_tvlv_tt_change *tt_change,
+ uint16_t tt_num_changes, uint8_t ttvn)
{
uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
+ struct batadv_tvlv_tt_vlan_data *tt_vlan;
bool full_table = true;
- struct batadv_tt_change *tt_change;
-
- /* don't care about a backbone gateways updates. */
- if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig))
- return;
+ tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff;
/* orig table not initialised AND first diff is in the OGM OR the ttvn
* increased by one -> we can apply the attached changes
*/
goto request_table;
}
- tt_change = (struct batadv_tt_change *)tt_buff;
+ spin_lock_bh(&orig_node->tt_lock);
+
+ tt_change = (struct batadv_tvlv_tt_change *)tt_buff;
batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes,
ttvn, tt_change);
* prefer to recompute it to spot any possible inconsistency
* in the global table
*/
- orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node);
+ batadv_tt_global_update_crc(bat_priv, orig_node);
+
+ spin_unlock_bh(&orig_node->tt_lock);
/* The ttvn alone is not enough to guarantee consistency
* because a single value could represent different states
* checking the CRC value is mandatory to detect the
* inconsistency
*/
- if (orig_node->tt_crc != tt_crc)
+ if (!batadv_tt_global_check_crc(orig_node, tt_vlan,
+ tt_num_vlan))
goto request_table;
} else {
/* if we missed more than one change or our tables are not
* in sync anymore -> request fresh tt data
*/
if (!orig_node->tt_initialised || ttvn != orig_ttvn ||
- orig_node->tt_crc != tt_crc) {
+ !batadv_tt_global_check_crc(orig_node, tt_vlan,
+ tt_num_vlan)) {
request_table:
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u crc: %#.4x last_crc: %#.4x num_changes: %u)\n",
- orig_node->orig, ttvn, orig_ttvn, tt_crc,
- orig_node->tt_crc, tt_num_changes);
+ "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n",
+ orig_node->orig, ttvn, orig_ttvn,
+ tt_num_changes);
batadv_send_tt_request(bat_priv, orig_node, ttvn,
- tt_crc, full_table);
+ tt_vlan, tt_num_vlan,
+ full_table);
return;
}
}
}
-/* returns true whether we know that the client has moved from its old
- * originator to another one. This entry is kept is still kept for consistency
- * purposes
+/**
+ * batadv_tt_global_client_is_roaming - check if a client is marked as roaming
+ * @bat_priv: the bat priv with all the soft interface information
+ * @addr: the mac address of the client to check
+ * @vid: VLAN identifier
+ *
+ * Returns true if we know that the client has moved from its old originator
+ * to another one. This entry is still kept for consistency purposes and will be
+ * deleted later by a DEL or because of timeout
*/
bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv,
- uint8_t *addr)
+ uint8_t *addr, unsigned short vid)
{
struct batadv_tt_global_entry *tt_global_entry;
bool ret = false;
- tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr);
+ tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid);
if (!tt_global_entry)
goto out;
/**
* batadv_tt_local_client_is_roaming - tells whether the client is roaming
* @bat_priv: the bat priv with all the soft interface information
- * @addr: the MAC address of the local client to query
+ * @addr: the mac address of the local client to query
+ * @vid: VLAN identifier
*
* Returns true if the local client is known to be roaming (it is not served by
* this node anymore) or not. If yes, the client is still present in the table
* to keep the latter consistent with the node TTVN
*/
bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv,
- uint8_t *addr)
+ uint8_t *addr, unsigned short vid)
{
struct batadv_tt_local_entry *tt_local_entry;
bool ret = false;
- tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr);
+ tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
if (!tt_local_entry)
goto out;
bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
- const unsigned char *addr)
+ const unsigned char *addr,
+ unsigned short vid)
{
bool ret = false;
- /* if the originator is a backbone node (meaning it belongs to the same
- * LAN of this node) the temporary client must not be added because to
- * reach such destination the node must use the LAN instead of the mesh
- */
- if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig))
- goto out;
-
- if (!batadv_tt_global_add(bat_priv, orig_node, addr,
+ if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid,
BATADV_TT_CLIENT_TEMP,
atomic_read(&orig_node->last_ttvn)))
goto out;
batadv_dbg(BATADV_DBG_TT, bat_priv,
- "Added temporary global client (addr: %pM orig: %pM)\n",
- addr, orig_node->orig);
+ "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n",
+ addr, BATADV_PRINT_VID(vid), orig_node->orig);
ret = true;
out:
return ret;
}
+
+/**
+ * batadv_tt_local_resize_to_mtu - resize the local translation table fit the
+ * maximum packet size that can be transported through the mesh
+ * @soft_iface: netdev struct of the mesh interface
+ *
+ * Remove entries older than 'timeout' and half timeout if more entries need
+ * to be removed.
+ */
+void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface)
+{
+ struct batadv_priv *bat_priv = netdev_priv(soft_iface);
+ int packet_size_max = atomic_read(&bat_priv->packet_size_max);
+ int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2;
+ bool reduced = false;
+
+ spin_lock_bh(&bat_priv->tt.commit_lock);
+
+ while (true) {
+ table_size = batadv_tt_local_table_transmit_size(bat_priv);
+ if (packet_size_max >= table_size)
+ break;
+
+ batadv_tt_local_purge(bat_priv, timeout);
+ batadv_tt_local_purge_pending_clients(bat_priv);
+
+ timeout /= 2;
+ reduced = true;
+ net_ratelimited_function(batadv_info, soft_iface,
+ "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n",
+ packet_size_max);
+ }
+
+ /* commit these changes immediately, to avoid synchronization problem
+ * with the TTVN
+ */
+ if (reduced)
+ batadv_tt_local_commit_changes_nolock(bat_priv);
+
+ spin_unlock_bh(&bat_priv->tt.commit_lock);
+}
+
+/**
+ * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container
+ * @bat_priv: the bat priv with all the soft interface information
+ * @orig: the orig_node of the ogm
+ * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
+ * @tvlv_value: tvlv buffer containing the gateway data
+ * @tvlv_value_len: tvlv buffer length
+ */
+static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
+ struct batadv_orig_node *orig,
+ uint8_t flags, void *tvlv_value,
+ uint16_t tvlv_value_len)
+{
+ struct batadv_tvlv_tt_vlan_data *tt_vlan;
+ struct batadv_tvlv_tt_change *tt_change;
+ struct batadv_tvlv_tt_data *tt_data;
+ uint16_t num_entries, num_vlan;
+
+ if (tvlv_value_len < sizeof(*tt_data))
+ return;
+
+ tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
+ tvlv_value_len -= sizeof(*tt_data);
+
+ num_vlan = ntohs(tt_data->num_vlan);
+
+ if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan)
+ return;
+
+ tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1);
+ tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan);
+ tvlv_value_len -= sizeof(*tt_vlan) * num_vlan;
+
+ num_entries = batadv_tt_entries(tvlv_value_len);
+
+ batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change,
+ num_entries, tt_data->ttvn);
+}
+
+/**
+ * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv
+ * container
+ * @bat_priv: the bat priv with all the soft interface information
+ * @src: mac address of tt tvlv sender
+ * @dst: mac address of tt tvlv recipient
+ * @tvlv_value: tvlv buffer containing the tt data
+ * @tvlv_value_len: tvlv buffer length
+ *
+ * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS
+ * otherwise.
+ */
+static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
+ uint8_t *src, uint8_t *dst,
+ void *tvlv_value,
+ uint16_t tvlv_value_len)
+{
+ struct batadv_tvlv_tt_data *tt_data;
+ uint16_t tt_vlan_len, tt_num_entries;
+ char tt_flag;
+ bool ret;
+
+ if (tvlv_value_len < sizeof(*tt_data))
+ return NET_RX_SUCCESS;
+
+ tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
+ tvlv_value_len -= sizeof(*tt_data);
+
+ tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data);
+ tt_vlan_len *= ntohs(tt_data->num_vlan);
+
+ if (tvlv_value_len < tt_vlan_len)
+ return NET_RX_SUCCESS;
+
+ tvlv_value_len -= tt_vlan_len;
+ tt_num_entries = batadv_tt_entries(tvlv_value_len);
+
+ switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) {
+ case BATADV_TT_REQUEST:
+ batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX);
+
+ /* If this node cannot provide a TT response the tt_request is
+ * forwarded
+ */
+ ret = batadv_send_tt_response(bat_priv, tt_data, src, dst);
+ if (!ret) {
+ if (tt_data->flags & BATADV_TT_FULL_TABLE)
+ tt_flag = 'F';
+ else
+ tt_flag = '.';
+
+ batadv_dbg(BATADV_DBG_TT, bat_priv,
+ "Routing TT_REQUEST to %pM [%c]\n",
+ dst, tt_flag);
+ /* tvlv API will re-route the packet */
+ return NET_RX_DROP;
+ }
+ break;
+ case BATADV_TT_RESPONSE:
+ batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX);
+
+ if (batadv_is_my_mac(bat_priv, dst)) {
+ batadv_handle_tt_response(bat_priv, tt_data,
+ src, tt_num_entries);
+ return NET_RX_SUCCESS;
+ }
+
+ if (tt_data->flags & BATADV_TT_FULL_TABLE)
+ tt_flag = 'F';
+ else
+ tt_flag = '.';
+
+ batadv_dbg(BATADV_DBG_TT, bat_priv,
+ "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag);
+
+ /* tvlv API will re-route the packet */
+ return NET_RX_DROP;
+ }
+
+ return NET_RX_SUCCESS;
+}
+
+/**
+ * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container
+ * @bat_priv: the bat priv with all the soft interface information
+ * @src: mac address of tt tvlv sender
+ * @dst: mac address of tt tvlv recipient
+ * @tvlv_value: tvlv buffer containing the tt data
+ * @tvlv_value_len: tvlv buffer length
+ *
+ * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS
+ * otherwise.
+ */
+static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv,
+ uint8_t *src, uint8_t *dst,
+ void *tvlv_value,
+ uint16_t tvlv_value_len)
+{
+ struct batadv_tvlv_roam_adv *roaming_adv;
+ struct batadv_orig_node *orig_node = NULL;
+
+ /* If this node is not the intended recipient of the
+ * roaming advertisement the packet is forwarded
+ * (the tvlv API will re-route the packet).
+ */
+ if (!batadv_is_my_mac(bat_priv, dst))
+ return NET_RX_DROP;
+
+ if (tvlv_value_len < sizeof(*roaming_adv))
+ goto out;
+
+ orig_node = batadv_orig_hash_find(bat_priv, src);
+ if (!orig_node)
+ goto out;
+
+ batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX);
+ roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value;
+
+ batadv_dbg(BATADV_DBG_TT, bat_priv,
+ "Received ROAMING_ADV from %pM (client %pM)\n",
+ src, roaming_adv->client);
+
+ batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client,
+ ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM,
+ atomic_read(&orig_node->last_ttvn) + 1);
+
+out:
+ if (orig_node)
+ batadv_orig_node_free_ref(orig_node);
+ return NET_RX_SUCCESS;
+}
+
+/**
+ * batadv_tt_init - initialise the translation table internals
+ * @bat_priv: the bat priv with all the soft interface information
+ *
+ * Return 0 on success or negative error number in case of failure.
+ */
+int batadv_tt_init(struct batadv_priv *bat_priv)
+{
+ int ret;
+
+ ret = batadv_tt_local_init(bat_priv);
+ if (ret < 0)
+ return ret;
+
+ ret = batadv_tt_global_init(bat_priv);
+ if (ret < 0)
+ return ret;
+
+ batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1,
+ batadv_tt_tvlv_unicast_handler_v1,
+ BATADV_TVLV_TT, 1, BATADV_NO_FLAGS);
+
+ batadv_tvlv_handler_register(bat_priv, NULL,
+ batadv_roam_tvlv_unicast_handler_v1,
+ BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS);
+
+ INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge);
+ queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work,
+ msecs_to_jiffies(BATADV_TT_WORK_PERIOD));
+
+ return 1;
+}
projects / cascardo / linux.git / blobdiff