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| author | Patrick McHardy <kaber@trash.net> | 2007-03-14 16:39:25 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:25:43 -0700 |
| commit | a3c5029cf7a96da3acdf6884a21581b5bef310c3 (patch) | |
| tree | c599a8870e199562f4937193f2b3dc3d56a55145 /net | |
| parent | c6a1e615d1ba942b9e783079d53f741e4a8e1c89 (diff) | |
| download | kernel-crypto-a3c5029cf7a96da3acdf6884a21581b5bef310c3.tar.gz kernel-crypto-a3c5029cf7a96da3acdf6884a21581b5bef310c3.tar.xz kernel-crypto-a3c5029cf7a96da3acdf6884a21581b5bef310c3.zip | |
[NETFILTER]: nfnetlink: use mutex instead of semaphore
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nfnetlink.c | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c index bf23e489e4c..7865a47c981 100644 --- a/net/netfilter/nfnetlink.c +++ b/net/netfilter/nfnetlink.c @@ -28,6 +28,7 @@ #include <asm/uaccess.h> #include <asm/system.h> #include <net/sock.h> +#include <net/netlink.h> #include <linux/init.h> #include <linux/spinlock.h> @@ -51,16 +52,28 @@ static char __initdata nfversion[] = "0.30"; static struct sock *nfnl = NULL; static struct nfnetlink_subsystem *subsys_table[NFNL_SUBSYS_COUNT]; -DECLARE_MUTEX(nfnl_sem); +static DEFINE_MUTEX(nfnl_mutex); -void nfnl_lock(void) +static void nfnl_lock(void) { - nfnl_shlock(); + mutex_lock(&nfnl_mutex); } -void nfnl_unlock(void) +static int nfnl_trylock(void) { - nfnl_shunlock(); + return !mutex_trylock(&nfnl_mutex); +} + +static void __nfnl_unlock(void) +{ + mutex_unlock(&nfnl_mutex); +} + +static void nfnl_unlock(void) +{ + mutex_unlock(&nfnl_mutex); + if (nfnl->sk_receive_queue.qlen) + nfnl->sk_data_ready(nfnl, 0); } int nfnetlink_subsys_register(struct nfnetlink_subsystem *n) @@ -248,11 +261,11 @@ static int nfnetlink_rcv_msg(struct sk_buff *skb, ss = nfnetlink_get_subsys(type); if (!ss) { #ifdef CONFIG_KMOD - /* don't call nfnl_shunlock, since it would reenter + /* don't call nfnl_unlock, since it would reenter * with further packet processing */ - up(&nfnl_sem); + __nfnl_unlock(); request_module("nfnetlink-subsys-%d", NFNL_SUBSYS_ID(type)); - nfnl_shlock(); + nfnl_lock(); ss = nfnetlink_get_subsys(type); if (!ss) #endif @@ -322,7 +335,7 @@ static void nfnetlink_rcv(struct sock *sk, int len) do { struct sk_buff *skb; - if (nfnl_shlock_nowait()) + if (nfnl_trylock()) return; while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { @@ -337,9 +350,9 @@ static void nfnetlink_rcv(struct sock *sk, int len) kfree_skb(skb); } - /* don't call nfnl_shunlock, since it would reenter + /* don't call nfnl_unlock, since it would reenter * with further packet processing */ - up(&nfnl_sem); + __nfnl_unlock(); } while(nfnl && nfnl->sk_receive_queue.qlen); } |