Displaying 4 results from an estimated 4 matches for "read_lock_bh".
2023 Jul 21
2
[Bridge] [PATCH] can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock
...;priv->j1939_socks_lock);
j1939_priv_put(priv);
jsk->state &= ~J1939_SOCK_BOUND;
@@ -329,13 +329,13 @@ bool j1939_sk_recv_match(struct j1939_priv *priv, struct j1939_sk_buff_cb *skcb)
struct j1939_sock *jsk;
bool match = false;
- spin_lock_bh(&priv->j1939_socks_lock);
+ read_lock_bh(&priv->j1939_socks_lock);
list_for_each_entry(jsk, &priv->j1939_socks, list) {
match = j1939_sk_recv_match_one(jsk, skcb);
if (match)
break;
}
- spin_unlock_bh(&priv->j1939_socks_lock);
+ read_unlock_bh(&priv->j1939_socks_lock);
return match;
}
@@ -344...
2007 Aug 14
0
ebtables locking issue
...the packets intercepted by dom0 ebtables code, extract some information, pass this information to userspace, wait for userspace response and then pass the result back to ebtable code.
Everything seemed to be working fine until i encountered locking issues. In the ebt_do_table code there is a "read_lock_bh" is used. When i try to wait inside this code path after sending info to my userspace tool and before returning NF_ACCEPT or NF_DROP, either the CPU hangs or i get an error "schedule while atomic". I tried out different methods for waiting like "wait_event_timeout" or busy...
2007 Apr 18
0
[Bridge] [PATCH] (4/4) bridge forwarding table RCU
...fdb_get(struct net_bridge *br, unsigned char *addr)
+/* No locking or refcounting, assumes caller has no preempt (rcu_read_lock) */
+struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
+ const unsigned char *addr)
{
struct hlist_node *h;
+ struct net_bridge_fdb_entry *fdb;
- read_lock_bh(&br->hash_lock);
-
- hlist_for_each(h, &br->hash[br_mac_hash(addr)]) {
- struct net_bridge_fdb_entry *fdb
- = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
-
+ hlist_for_each_entry_rcu(fdb, h, &br->hash[br_mac_hash(addr)], hlist) {
if (!memcmp(fdb->addr.addr, a...
2007 Apr 18
4
[Bridge] MTU Question
I have a bridge that has gigabit interfaces. The machine in question has the
fun job of being a Bridge, Firewall and SMB server. Both of the Gigabit
interfaces are connected to workstations directly via Xover cable (well
MDI-X to be exact). My question is, if I enable jumbo frames on the gigabit
interfaces will that make any difference in overall transfer rate of the
bridge? I was thinking it