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netfilter: nfnetlink: add mutex per subsystem

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This patch replaces the global lock to one lock per subsystem.
The per-subsystem lock avoids that processes operating
with different subsystems are synchronized.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso
2013-02-05 01:50:26 +01:00
parent 5474f57f7d
commit c14b78e7de
4 changed files with 53 additions and 41 deletions
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4
include/linux/netfilter/nfnetlink.h
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@@ -34,8 +34,8 @@ extern int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigne
extern int nfnetlink_set_err(struct net *net, u32 pid, u32 group, int error);
extern int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u_int32_t pid, int flags);
extern void nfnl_lock(void);
extern void nfnl_unlock(void);
extern void nfnl_lock(__u8 subsys_id);
extern void nfnl_unlock(__u8 subsys_id);
#define MODULE_ALIAS_NFNL_SUBSYS(subsys) \
MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys))