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| author | Gao feng <gaofeng@cn.fujitsu.com> | 2013-09-25 15:38:46 +0800 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2013-10-17 10:48:07 +0200 |
| commit | f1e8077f490cff4253b197154bf2affaa0ca08e3 (patch) | |
| tree | a429ab86b5315b525c5919abc7e138127fcecb41 /net | |
| parent | 26a89e435462bfdde586ad062bf190cdbfe53a49 (diff) | |
| download | linux-stable-f1e8077f490cff4253b197154bf2affaa0ca08e3.tar.gz linux-stable-f1e8077f490cff4253b197154bf2affaa0ca08e3.tar.bz2 linux-stable-f1e8077f490cff4253b197154bf2affaa0ca08e3.zip | |
netfilter: ipt_CLUSTERIP: make clusterip_lock per net namespace
this lock is used for protecting clusterip_configs of per
net namespace, it should be per net namespace too.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/netfilter/ipt_CLUSTERIP.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c index 8ef3e6f38635..1bf5aa3096c1 100644 --- a/net/ipv4/netfilter/ipt_CLUSTERIP.c +++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c @@ -58,9 +58,6 @@ struct clusterip_config { struct rcu_head rcu; }; -/* clusterip_lock protects the clusterip_configs list */ -static DEFINE_SPINLOCK(clusterip_lock); - #ifdef CONFIG_PROC_FS static const struct file_operations clusterip_proc_fops; #endif @@ -69,6 +66,9 @@ static int clusterip_net_id __read_mostly; struct clusterip_net { struct list_head configs; + /* lock protects the configs list */ + spinlock_t lock; + #ifdef CONFIG_PROC_FS struct proc_dir_entry *procdir; #endif @@ -99,10 +99,12 @@ clusterip_config_put(struct clusterip_config *c) static inline void clusterip_config_entry_put(struct clusterip_config *c) { + struct clusterip_net *cn = net_generic(&init_net, clusterip_net_id); + local_bh_disable(); - if (atomic_dec_and_lock(&c->entries, &clusterip_lock)) { + if (atomic_dec_and_lock(&c->entries, &cn->lock)) { list_del_rcu(&c->list); - spin_unlock(&clusterip_lock); + spin_unlock(&cn->lock); local_bh_enable(); dev_mc_del(c->dev, c->clustermac); @@ -198,9 +200,9 @@ clusterip_config_init(const struct ipt_clusterip_tgt_info *i, __be32 ip, } #endif - spin_lock_bh(&clusterip_lock); + spin_lock_bh(&cn->lock); list_add_rcu(&c->list, &cn->configs); - spin_unlock_bh(&clusterip_lock); + spin_unlock_bh(&cn->lock); return c; } @@ -713,6 +715,8 @@ static int clusterip_net_init(struct net *net) INIT_LIST_HEAD(&cn->configs); + spin_lock_init(&cn->lock); + #ifdef CONFIG_PROC_FS cn->procdir = proc_mkdir("ipt_CLUSTERIP", net->proc_net); if (!cn->procdir) { |