lkml.org 
[lkml]   [2011]   [Jan]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH] net: filter: dont block softirqs in sk_run_filter()
From
Date
Packet filter (BPF) doesnt need to disable softirqs, being fully
re-entrant and lock-less.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
---
include/net/sock.h | 2 +-
net/core/filter.c | 6 +++---
net/packet/af_packet.c | 6 +++---
3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/net/sock.h b/include/net/sock.h
index d884d26..ba6465b 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1189,7 +1189,7 @@ extern void sk_filter_release_rcu(struct rcu_head *rcu);
static inline void sk_filter_release(struct sk_filter *fp)
{
if (atomic_dec_and_test(&fp->refcnt))
- call_rcu_bh(&fp->rcu, sk_filter_release_rcu);
+ call_rcu(&fp->rcu, sk_filter_release_rcu);
}

static inline void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp)
diff --git a/net/core/filter.c b/net/core/filter.c
index afc5837..232b187 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -142,14 +142,14 @@ int sk_filter(struct sock *sk, struct sk_buff *skb)
if (err)
return err;

- rcu_read_lock_bh();
- filter = rcu_dereference_bh(sk->sk_filter);
+ rcu_read_lock();
+ filter = rcu_dereference(sk->sk_filter);
if (filter) {
unsigned int pkt_len = sk_run_filter(skb, filter->insns);

err = pkt_len ? pskb_trim(skb, pkt_len) : -EPERM;
}
- rcu_read_unlock_bh();
+ rcu_read_unlock();

return err;
}
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 91cb1d7..c3fc7b7 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -523,11 +523,11 @@ static inline unsigned int run_filter(const struct sk_buff *skb,
{
struct sk_filter *filter;

- rcu_read_lock_bh();
- filter = rcu_dereference_bh(sk->sk_filter);
+ rcu_read_lock();
+ filter = rcu_dereference(sk->sk_filter);
if (filter != NULL)
res = sk_run_filter(skb, filter->insns);
- rcu_read_unlock_bh();
+ rcu_read_unlock();

return res;
}



\
 
 \ /
  Last update: 2011-01-18 18:49    [W:0.049 / U:0.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site