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batman-adv: protect neighbor list with rcu locks

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Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
This commit is contained in:
Marek Lindner
2010-12-12 21:57:12 +00:00
parent 9591a79f28
commit f987ed6ebd
3 changed files with 57 additions and 21 deletions
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41
net/batman-adv/routing.c
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@@ -153,14 +153,16 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
unsigned char total_count;
if (orig_node == orig_neigh_node) {
hlist_for_each_entry(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
if (compare_orig(tmp_neigh_node->addr,
orig_neigh_node->orig) &&
(tmp_neigh_node->if_incoming == if_incoming))
neigh_node = tmp_neigh_node;
}
rcu_read_unlock();
if (!neigh_node)
neigh_node = create_neighbor(orig_node,
@@ -174,14 +176,16 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
neigh_node->last_valid = jiffies;
} else {
/* find packet count of corresponding one hop neighbor */
hlist_for_each_entry(tmp_neigh_node, node,
&orig_neigh_node->neigh_list, list) {
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_neigh_node->neigh_list, list) {
if (compare_orig(tmp_neigh_node->addr,
orig_neigh_node->orig) &&
(tmp_neigh_node->if_incoming == if_incoming))
neigh_node = tmp_neigh_node;
}
rcu_read_unlock();
if (!neigh_node)
neigh_node = create_neighbor(orig_neigh_node,
@@ -266,8 +270,9 @@ static void update_orig(struct bat_priv *bat_priv,
bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
"Searching and updating originator entry of received packet\n");
hlist_for_each_entry(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
(tmp_neigh_node->if_incoming == if_incoming)) {
neigh_node = tmp_neigh_node;
@@ -282,6 +287,7 @@ static void update_orig(struct bat_priv *bat_priv,
tmp_neigh_node->tq_avg =
ring_buffer_avg(tmp_neigh_node->tq_recv);
}
rcu_read_unlock();
if (!neigh_node) {
struct orig_node *orig_tmp;
@@ -410,8 +416,9 @@ static char count_real_packets(struct ethhdr *ethhdr,
&orig_node->batman_seqno_reset))
return -1;
hlist_for_each_entry(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
is_duplicate |= get_bit_status(tmp_neigh_node->real_bits,
orig_node->last_real_seqno,
@@ -431,6 +438,7 @@ static char count_real_packets(struct ethhdr *ethhdr,
tmp_neigh_node->real_packet_count =
bit_packet_count(tmp_neigh_node->real_bits);
}
rcu_read_unlock();
if (need_update) {
bat_dbg(DBG_BATMAN, bat_priv,
@@ -481,15 +489,19 @@ void update_bonding_candidates(struct orig_node *orig_node)
* as "bonding partner" */
/* first, zero the list */
hlist_for_each_entry(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
tmp_neigh_node->next_bond_candidate = NULL;
}
rcu_read_unlock();
first_candidate = NULL;
last_candidate = NULL;
hlist_for_each_entry(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
rcu_read_lock();
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
/* only consider if it has the same primary address ... */
if (memcmp(orig_node->orig,
@@ -506,8 +518,8 @@ void update_bonding_candidates(struct orig_node *orig_node)
* select this candidate because of possible interference. */
interference_candidate = 0;
hlist_for_each_entry(tmp_neigh_node2, node2,
&orig_node->neigh_list, list) {
hlist_for_each_entry_rcu(tmp_neigh_node2, node2,
&orig_node->neigh_list, list) {
if (tmp_neigh_node2 == tmp_neigh_node)
continue;
@@ -541,6 +553,7 @@ void update_bonding_candidates(struct orig_node *orig_node)
candidates++;
}
rcu_read_unlock();
if (candidates > 0) {
first_candidate->next_bond_candidate = last_candidate;