diff options
Diffstat (limited to 'net/batman-adv')
| -rw-r--r-- | net/batman-adv/main.h | 1 | ||||
| -rw-r--r-- | net/batman-adv/packet.h | 1 | ||||
| -rw-r--r-- | net/batman-adv/translation-table.c | 127 | ||||
| -rw-r--r-- | net/batman-adv/translation-table.h | 4 | ||||
| -rw-r--r-- | net/batman-adv/types.h | 1 |
5 files changed, 101 insertions, 33 deletions
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h index 574fca1bd434..61a0cfd3ceb4 100644 --- a/net/batman-adv/main.h +++ b/net/batman-adv/main.h @@ -43,6 +43,7 @@ #define BATADV_PURGE_TIMEOUT 200000 /* 200 seconds */ #define BATADV_TT_LOCAL_TIMEOUT 3600000 /* in milliseconds */ #define BATADV_TT_CLIENT_ROAM_TIMEOUT 600000 /* in milliseconds */ +#define BATADV_TT_CLIENT_TEMP_TIMEOUT 600000 /* in milliseconds */ /* sliding packet range of received originator messages in sequence numbers * (should be a multiple of our word size) */ diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index eb4593413b73..2d23a14c220e 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/packet.h @@ -85,6 +85,7 @@ enum batadv_tt_client_flags { BATADV_TT_CLIENT_DEL = BIT(0), BATADV_TT_CLIENT_ROAM = BIT(1), BATADV_TT_CLIENT_WIFI = BIT(2), + BATADV_TT_CLIENT_TEMP = BIT(3), BATADV_TT_CLIENT_NOPURGE = BIT(8), BATADV_TT_CLIENT_NEW = BIT(9), BATADV_TT_CLIENT_PENDING = BIT(10), diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index cb429d181f4d..112edd371b2f 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -34,6 +34,10 @@ static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, static void batadv_tt_purge(struct work_struct *work); static void batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); +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); /* returns 1 if they are the same mac addr */ static int batadv_compare_tt(const struct hlist_node *node, const void *data2) @@ -268,6 +272,7 @@ void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, tt_local_entry->common.flags |= BATADV_TT_CLIENT_WIFI; atomic_set(&tt_local_entry->common.refcount, 2); tt_local_entry->last_seen = jiffies; + tt_local_entry->common.added_at = tt_local_entry->last_seen; /* the batman interface mac address should never be purged */ if (batadv_compare_eth(addr, soft_iface->dev_addr)) @@ -682,8 +687,13 @@ batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, struct batadv_tt_orig_list_entry *orig_entry; orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); - if (orig_entry) + if (orig_entry) { + /* refresh the ttvn: the current value could be a bogus one that + * was added during a "temporary client detection" + */ + orig_entry->ttvn = ttvn; goto out; + } orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); if (!orig_entry) @@ -729,6 +739,7 @@ int batadv_tt_global_add(struct batadv_priv *bat_priv, common->flags = flags; tt_global_entry->roam_at = 0; atomic_set(&common->refcount, 2); + common->added_at = jiffies; INIT_HLIST_HEAD(&tt_global_entry->orig_list); spin_lock_init(&tt_global_entry->list_lock); @@ -744,7 +755,19 @@ int batadv_tt_global_add(struct batadv_priv *bat_priv, goto out_remove; } } else { - /* there is already a global entry, use this one. */ + /* If there is already a global entry, we can use this one for + * our processing. + * But if we are trying to add a temporary client we can exit + * directly because the temporary information should never + * override any already known client state (whatever it is) + */ + if (flags & BATADV_TT_CLIENT_TEMP) + goto out; + + /* if the client was temporary added before receiving the first + * OGM announcing it, we have to clear the TEMP flag + */ + tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_TEMP; /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only * one originator left in the list and we previously received a @@ -758,9 +781,8 @@ int batadv_tt_global_add(struct batadv_priv *bat_priv, tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; tt_global_entry->roam_at = 0; } - } - /* add the new orig_entry (if needed) */ + /* add the new orig_entry (if needed) or update it */ batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); batadv_dbg(BATADV_DBG_TT, bat_priv, @@ -800,11 +822,12 @@ batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, hlist_for_each_entry_rcu(orig_entry, node, head, list) { flags = tt_common_entry->flags; last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); - seq_printf(seq, " * %pM (%3u) via %pM (%3u) [%c%c]\n", + seq_printf(seq, " * %pM (%3u) via %pM (%3u) [%c%c%c]\n", tt_global_entry->common.addr, orig_entry->ttvn, orig_entry->orig_node->orig, last_ttvn, (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), - (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.')); + (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), + (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); } } @@ -1059,49 +1082,63 @@ void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, orig_node->tt_initialised = false; } -static void batadv_tt_global_roam_purge_list(struct batadv_priv *bat_priv, - struct hlist_head *head) +static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, + char **msg) { - struct batadv_tt_common_entry *tt_common_entry; - struct batadv_tt_global_entry *tt_global_entry; - struct hlist_node *node, *node_tmp; + bool purge = false; + unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; + unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; - hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, head, - hash_entry) { - tt_global_entry = container_of(tt_common_entry, - struct batadv_tt_global_entry, - common); - if (!(tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM)) - continue; - if (!batadv_has_timed_out(tt_global_entry->roam_at, - BATADV_TT_CLIENT_ROAM_TIMEOUT)) - continue; - - batadv_dbg(BATADV_DBG_TT, bat_priv, - "Deleting global tt entry (%pM): Roaming timeout\n", - tt_global_entry->common.addr); + if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && + batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { + purge = true; + *msg = "Roaming timeout\n"; + } - hlist_del_rcu(node); - batadv_tt_global_entry_free_ref(tt_global_entry); + if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && + batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { + purge = true; + *msg = "Temporary client timeout\n"; } + + return purge; } -static void batadv_tt_global_roam_purge(struct batadv_priv *bat_priv) +static void batadv_tt_global_purge(struct batadv_priv *bat_priv) { struct batadv_hashtable *hash = bat_priv->tt.global_hash; struct hlist_head *head; + struct hlist_node *node, *node_tmp; spinlock_t *list_lock; /* protects write access to the hash lists */ uint32_t i; + char *msg = NULL; + struct batadv_tt_common_entry *tt_common; + struct batadv_tt_global_entry *tt_global; for (i = 0; i < hash->size; i++) { head = &hash->table[i]; list_lock = &hash->list_locks[i]; spin_lock_bh(list_lock); - batadv_tt_global_roam_purge_list(bat_priv, head); + hlist_for_each_entry_safe(tt_common, node, node_tmp, head, + hash_entry) { + tt_global = container_of(tt_common, + struct batadv_tt_global_entry, + common); + + if (!batadv_tt_global_to_purge(tt_global, &msg)) + continue; + + batadv_dbg(BATADV_DBG_TT, bat_priv, + "Deleting global tt entry (%pM): %s\n", + tt_global->common.addr, msg); + + hlist_del_rcu(node); + + batadv_tt_global_entry_free_ref(tt_global); + } spin_unlock_bh(list_lock); } - } static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) @@ -1239,6 +1276,12 @@ static uint16_t batadv_tt_global_crc(struct batadv_priv *bat_priv, */ if (tt_common->flags & BATADV_TT_CLIENT_ROAM) continue; + /* Temporary clients have not been announced yet, so + * they have to be skipped while computing the global + * crc + */ + if (tt_common->flags & BATADV_TT_CLIENT_TEMP) + continue; /* find out if this global entry is announced by this * originator @@ -1392,7 +1435,8 @@ static int batadv_tt_global_valid(const void *entry_ptr, const struct batadv_tt_global_entry *tt_global_entry; const struct batadv_orig_node *orig_node = data_ptr; - if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM) + if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || + tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) return 0; tt_global_entry = container_of(tt_common_entry, @@ -2125,7 +2169,7 @@ static void batadv_tt_purge(struct work_struct *work) bat_priv = container_of(priv_tt, struct batadv_priv, tt); batadv_tt_local_purge(bat_priv); - batadv_tt_global_roam_purge(bat_priv); + batadv_tt_global_purge(bat_priv); batadv_tt_req_purge(bat_priv); batadv_tt_roam_purge(bat_priv); @@ -2399,3 +2443,22 @@ bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, out: return ret; } + +bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig_node, + const unsigned char *addr) +{ + bool ret = false; + + if (!batadv_tt_global_add(bat_priv, orig_node, addr, + 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); + ret = true; +out: + return ret; +} diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h index ffa87355096b..811fffd4760c 100644 --- a/net/batman-adv/translation-table.h +++ b/net/batman-adv/translation-table.h @@ -59,6 +59,8 @@ int batadv_tt_append_diff(struct batadv_priv *bat_priv, int packet_min_len); bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, uint8_t *addr); - +bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig_node, + const unsigned char *addr); #endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */ diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index 97c4978dee69..2ed82caacdca 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -284,6 +284,7 @@ struct batadv_tt_common_entry { uint8_t addr[ETH_ALEN]; struct hlist_node hash_entry; uint16_t flags; + unsigned long added_at; atomic_t refcount; struct rcu_head rcu; }; |