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);
}
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);
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)
+{
+ 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)
{
if (bat_priv->tt.local_hash)
* @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.
*/
-void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
+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;
+
+ 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);
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;
*/
tt_local->common.flags = BATADV_TT_CLIENT_NEW;
tt_local->common.vid = vid;
- if (batadv_is_wifi_iface(ifindex))
+ 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;
}
}
+ /* 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;
+}
+
+/**
+ * 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)
+{
+ 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);
+
+ /* 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) {
+ *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;
+}
+
+/**
+ * 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;
+
+ 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);
+ }
+
+ 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);
+
+ 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;
}
/**
struct batadv_tt_change_node *entry, *safe;
struct batadv_tvlv_tt_data *tt_data;
struct batadv_tvlv_tt_change *tt_change;
- int tt_diff_len = 0, tt_change_len = 0;
+ 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_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes));
+ 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;
- tt_data = kzalloc(sizeof(*tt_data) + tt_diff_len, GFP_ATOMIC);
- if (!tt_data)
+ tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data,
+ &tt_change, &tt_diff_len);
+ if (!tvlv_len)
return;
tt_data->flags = BATADV_TT_OGM_DIFF;
- tt_data->ttvn = atomic_read(&bat_priv->tt.vn);
- tt_data->crc = htonl(bat_priv->tt.local_crc);
if (tt_diff_len == 0)
goto container_register;
- tt_diff_entries_num = batadv_tt_entries(tt_diff_len);
-
spin_lock_bh(&bat_priv->tt.changes_list_lock);
atomic_set(&bat_priv->tt.local_changes, 0);
- tt_change = (struct batadv_tvlv_tt_change *)(tt_data + 1);
-
list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list,
list) {
if (tt_diff_entries_count < tt_diff_entries_num) {
container_register:
batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data,
- sizeof(*tt_data) + tt_change_len);
+ tvlv_len);
kfree(tt_data);
}
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: %#.8x):\n",
- net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn),
- bat_priv->tt.local_crc);
- seq_printf(seq, " %-13s %s %-7s %-10s\n", "Client", "VID",
- "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 %4i [%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 &
(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();
}
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);
struct batadv_tt_common_entry *common;
uint16_t local_flags;
+ /* 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);
}
/* 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 %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 %4d (%3u) via %pM (%3u) [%c%c%c]\n",
+ " %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);
}
}
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);
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);
}
}
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;
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);
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;
* 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
* 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)
+ struct batadv_orig_node *orig_node,
+ unsigned short vid)
{
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, crc_tmp, crc = 0;
+ uint8_t flags;
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
crc_tmp = crc32c(0, &tt_common->vid,
sizeof(tt_common->vid));
+
+ /* compute the CRC on flags that have to be kept in sync
+ * among nodes
+ */
+ flags = tt_common->flags & BATADV_TT_SYNC_MASK;
+ crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
+
crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
}
rcu_read_unlock();
/**
* 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)
+static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv,
+ unsigned short vid)
{
struct batadv_hashtable *hash = bat_priv->tt.local_hash;
struct batadv_tt_common_entry *tt_common;
struct hlist_head *head;
uint32_t i, crc_tmp, crc = 0;
+ uint8_t flags;
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
*/
crc_tmp = crc32c(0, &tt_common->vid,
sizeof(tt_common->vid));
+
+ /* compute the CRC on flags that have to be kept in sync
+ * among nodes
+ */
+ flags = tt_common->flags & BATADV_TT_SYNC_MASK;
+ crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
+
crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
}
rcu_read_unlock();
}
/**
- * batadv_tt_tvlv_generate - creates tvlv tt data buffer to fill it with the
- * tt entries from the specified tt hash
+ * 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
- *
- * Returns pointer to allocated tvlv tt data buffer if operation was
- * successful or NULL otherwise.
*/
-static struct batadv_tvlv_tt_data *
-batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
- struct batadv_hashtable *hash, uint16_t tt_len,
- int (*valid_cb)(const void *, const void *),
- void *cb_data)
+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_tvlv_tt_data *tvlv_tt_data = NULL;
struct batadv_tvlv_tt_change *tt_change;
struct hlist_head *head;
uint16_t tt_tot, tt_num_entries = 0;
- ssize_t tvlv_tt_size = sizeof(struct batadv_tvlv_tt_data);
uint32_t i;
- if (tvlv_tt_size + tt_len > bat_priv->soft_iface->mtu) {
- tt_len = bat_priv->soft_iface->mtu - tvlv_tt_size;
- tt_len -= tt_len % sizeof(struct batadv_tvlv_tt_change);
- }
-
tt_tot = batadv_tt_entries(tt_len);
-
- tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len,
- GFP_ATOMIC);
- if (!tvlv_tt_data)
- goto out;
-
- tt_change = (struct batadv_tvlv_tt_change *)(tvlv_tt_data + 1);
+ tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;
rcu_read_lock();
for (i = 0; i < hash->size; i++) {
}
}
rcu_read_unlock();
+}
-out:
- return tvlv_tt_data;
+/**
+ * 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;
+
+ /* 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();
}
/**
* @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_crc: the CRC associated with the version number
+ * @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, uint32_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 batadv_tvlv_tt_data *tvlv_tt_data = NULL;
- struct batadv_hard_iface *primary_if;
struct batadv_tt_req_node *tt_req_node = NULL;
+ 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;
- tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data), GFP_ATOMIC);
+ size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan;
+ tvlv_tt_data = kzalloc(size, GFP_ATOMIC);
if (!tvlv_tt_data)
goto out;
tvlv_tt_data->flags = BATADV_TT_REQUEST;
tvlv_tt_data->ttvn = ttvn;
- tvlv_tt_data->crc = htonl(tt_crc);
+ tvlv_tt_data->num_vlan = htons(num_vlan);
+
+ /* 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_vlan_req++;
+ tt_vlan++;
+ }
if (full_table)
tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE;
batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX);
batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
dst_orig_node->orig, BATADV_TVLV_TT, 1,
- tvlv_tt_data, sizeof(*tvlv_tt_data));
+ tvlv_tt_data, size);
ret = true;
out:
{
struct batadv_orig_node *req_dst_orig_node;
struct batadv_orig_node *res_dst_orig_node = NULL;
+ struct batadv_tvlv_tt_change *tt_change;
struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
- uint8_t orig_ttvn, req_ttvn;
- uint16_t tt_len;
+ 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",
orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn);
req_ttvn = tt_data->ttvn;
+ 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_data->crc != htonl(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 */
spin_lock_bh(&req_dst_orig_node->tt_buff_lock);
tt_len = req_dst_orig_node->tt_buff_len;
- tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len,
- GFP_ATOMIC);
- if (!tvlv_tt_data)
+ tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node,
+ &tvlv_tt_data,
+ &tt_change,
+ &tt_len);
+ if (!tt_len)
goto unlock;
/* Copy the last orig_node's OGM buffer */
- memcpy(tvlv_tt_data + 1, 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 = batadv_tt_len(tt_len);
-
- tvlv_tt_data = batadv_tt_tvlv_generate(bat_priv,
- bat_priv->tt.global_hash,
- tt_len,
- batadv_tt_global_valid,
- req_dst_orig_node);
- if (!tvlv_tt_data)
+ /* 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;
+
+ /* 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;
}
tvlv_tt_data->flags = BATADV_TT_RESPONSE;
batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig,
- req_src, BATADV_TVLV_TT, 1,
- tvlv_tt_data, sizeof(*tvlv_tt_data) + tt_len);
+ req_src, BATADV_TVLV_TT, 1, tvlv_tt_data,
+ tvlv_len);
ret = true;
goto out;
uint8_t *req_src)
{
struct batadv_tvlv_tt_data *tvlv_tt_data = NULL;
- struct batadv_orig_node *orig_node;
struct batadv_hard_iface *primary_if = NULL;
+ 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;
+ int32_t tt_len;
batadv_dbg(BATADV_DBG_TT, bat_priv,
"Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n",
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_data->ttvn;
*/
if (!full_table) {
spin_lock_bh(&bat_priv->tt.last_changeset_lock);
- tt_len = bat_priv->tt.last_changeset_len;
- tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len,
- GFP_ATOMIC);
- if (!tvlv_tt_data)
+ 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;
/* Copy the last orig_node's OGM buffer */
- memcpy(tvlv_tt_data + 1, bat_priv->tt.last_changeset,
+ 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 = batadv_tt_len(tt_len);
req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn);
- tvlv_tt_data = batadv_tt_tvlv_generate(bat_priv,
- bat_priv->tt.local_hash,
- tt_len,
- batadv_tt_local_valid,
- NULL);
- if (!tvlv_tt_data)
+ /* 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;
+
+ /* 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);
}
tvlv_tt_data->flags = BATADV_TT_RESPONSE;
batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr,
- req_src, BATADV_TVLV_TT, 1,
- tvlv_tt_data, sizeof(*tvlv_tt_data) + tt_len);
+ 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)
struct batadv_tvlv_tt_data *tt_data,
uint8_t *req_src, uint8_t *req_dst)
{
- if (batadv_is_my_mac(bat_priv, req_dst)) {
- /* don't answer backbone gws! */
- if (batadv_bla_is_backbone_gw_orig(bat_priv, req_src))
- return true;
-
+ if (batadv_is_my_mac(bat_priv, req_dst))
return batadv_send_my_tt_response(bat_priv, tt_data, req_src);
- } else {
+ 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,
}
static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv,
- struct batadv_tvlv_tt_data *tt_data,
- uint8_t *resp_src, uint16_t num_entries)
+ struct batadv_tvlv_tt_change *tt_change,
+ uint8_t ttvn, uint8_t *resp_src,
+ uint16_t num_entries)
{
struct batadv_orig_node *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_tvlv_tt_change *)(tt_data + 1),
- num_entries, tt_data->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_data->ttvn);
+ atomic_set(&orig_node->last_ttvn, ttvn);
out:
if (orig_node)
struct batadv_tt_req_node *node, *safe;
struct batadv_orig_node *orig_node = NULL;
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",
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, resp_src))
- goto out;
-
orig_node = batadv_orig_hash_find(bat_priv, resp_src);
if (!orig_node)
goto out;
+ 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_data, resp_src, num_entries);
+ batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn,
+ resp_src, num_entries);
} else {
- tt_change = (struct batadv_tvlv_tt_change *)(tt_data + 1);
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) {
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);
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);
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 */
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,
}
/**
- * batadv_tt_local_commit_changes - commit all pending local tt changes which
- * have been queued in the time since the last commit
+ * 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.
*/
-void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv)
+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) {
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);
batadv_tt_tvlv_container_update(bat_priv);
}
+/**
+ * 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)
+{
+ 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, unsigned short vid)
{
* information received via ogms
* @bat_priv: the bat priv with all the soft interface information
* @orig: the orig_node of the ogm
- * @tt_buff: buffer holding the tt information
+ * @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 unsigned char *tt_buff,
- uint16_t tt_num_changes, uint8_t ttvn,
- uint32_t tt_crc)
+ 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_tvlv_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;
}
+ 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: %#.8x last_crc: %#.8x 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;
}
}
{
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, vid,
BATADV_TT_CLIENT_TEMP,
atomic_read(&orig_node->last_ttvn)))
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
*/
static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig,
- uint8_t flags,
- void *tvlv_value,
+ 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;
+ 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,
- (unsigned char *)(tt_data + 1),
- num_entries, tt_data->ttvn, ntohl(tt_data->crc));
+ batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change,
+ num_entries, tt_data->ttvn);
}
/**
uint16_t tvlv_value_len)
{
struct batadv_tvlv_tt_data *tt_data;
- uint16_t num_entries;
+ uint16_t tt_vlan_len, tt_num_entries;
char tt_flag;
bool ret;
tt_data = (struct batadv_tvlv_tt_data *)tvlv_value;
tvlv_value_len -= sizeof(*tt_data);
- num_entries = batadv_tt_entries(tvlv_value_len);
+ 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:
if (batadv_is_my_mac(bat_priv, dst)) {
batadv_handle_tt_response(bat_priv, tt_data,
- src, num_entries);
+ src, tt_num_entries);
return NET_RX_SUCCESS;
}
if (!batadv_is_my_mac(bat_priv, dst))
return NET_RX_DROP;
- /* check if it is a backbone gateway. we don't accept
- * roaming advertisement from it, as it has the same
- * entries as we have.
- */
- if (batadv_bla_is_backbone_gw_orig(bat_priv, src))
- goto out;
-
if (tvlv_value_len < sizeof(*roaming_adv))
goto out;
{
int ret;
+ /* synchronized flags must be remote */
+ BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK));
+
ret = batadv_tt_local_init(bat_priv);
if (ret < 0)
return ret;
projects / cascardo / linux.git / blobdiff