summaryrefslogtreecommitdiffstats
path: root/net/batman-adv
diff options
context:
space:
mode:
authorAntonio Quartulli <ordex@autistici.org>2011-11-07 16:36:40 +0100
committerMarek Lindner <lindner_marek@yahoo.de>2012-02-17 02:50:18 +0800
commit17071578888c7c18709e48e74fae228c04581b9a (patch)
treea2513bb57d5685db9cfeab65a3d9c645c0df5e7c /net/batman-adv
parentdcd6c92267155e70a94b3927bce681ce74b80d1f (diff)
downloadlinux-17071578888c7c18709e48e74fae228c04581b9a.tar.gz
linux-17071578888c7c18709e48e74fae228c04581b9a.tar.bz2
linux-17071578888c7c18709e48e74fae228c04581b9a.zip
batman-adv: add tt_initialised flag to the orig_node struct
(ttvn == 0) is currently used as initial condition. However this is not a good idea because ttvn gets the vale zero each time after reaching the maximum value (wrap around). For this reason a new flag is added in order to define whether a node has an initialised table or not. Moreover, after invoking tt_global_del_orig(), tt_initialised has to be set to false Reported-by: Alexey Fisher <bug-track@fisher-privat.net> Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Tested-by: Alexey Fisher <bug-track@fisher-privat.net> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/originator.c1
-rw-r--r--net/batman-adv/translation-table.c11
-rw-r--r--net/batman-adv/types.h1
3 files changed, 10 insertions, 3 deletions
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 0bc2045a2f2e..847ff7e98a61 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -219,6 +219,7 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, const uint8_t *addr)
/* extra reference for return */
atomic_set(&orig_node->refcount, 2);
+ orig_node->tt_initialised = false;
orig_node->tt_poss_change = false;
orig_node->bat_priv = bat_priv;
memcpy(orig_node->orig, addr, ETH_ALEN);
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index ab8dea8b0b2e..c632475df375 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -733,6 +733,7 @@ void tt_global_del_orig(struct bat_priv *bat_priv,
spin_unlock_bh(list_lock);
}
atomic_set(&orig_node->tt_size, 0);
+ orig_node->tt_initialised = false;
}
static void tt_global_roam_purge(struct bat_priv *bat_priv)
@@ -1450,6 +1451,7 @@ static void _tt_update_changes(struct bat_priv *bat_priv,
*/
return;
}
+ orig_node->tt_initialised = true;
}
static void tt_fill_gtable(struct bat_priv *bat_priv,
@@ -1854,8 +1856,10 @@ void tt_update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
bool full_table = true;
- /* the ttvn increased by one -> we can apply the attached changes */
- if (ttvn - orig_ttvn == 1) {
+ /* orig table not initialised AND first diff is in the OGM OR the ttvn
+ * increased by one -> we can apply the attached changes */
+ if ((!orig_node->tt_initialised && ttvn == 1) ||
+ ttvn - orig_ttvn == 1) {
/* the OGM could not contain the changes due to their size or
* because they have already been sent TT_OGM_APPEND_MAX times.
* In this case send a tt request */
@@ -1889,7 +1893,8 @@ void tt_update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
} else {
/* if we missed more than one change or our tables are not
* in sync anymore -> request fresh tt data */
- if (ttvn != orig_ttvn || orig_node->tt_crc != tt_crc) {
+ if (!orig_node->tt_initialised || ttvn != orig_ttvn ||
+ orig_node->tt_crc != tt_crc) {
request_table:
bat_dbg(DBG_TT, bat_priv, "TT inconsistency for %pM. "
"Need to retrieve the correct information "
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index e9eb043719ac..35085f410b96 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -81,6 +81,7 @@ struct orig_node {
int16_t tt_buff_len;
spinlock_t tt_buff_lock; /* protects tt_buff */
atomic_t tt_size;
+ bool tt_initialised;
/* The tt_poss_change flag is used to detect an ongoing roaming phase.
* If true, then I sent a Roaming_adv to this orig_node and I have to
* inspect every packet directed to it to check whether it is still