diff options
Diffstat (limited to 'net/netfilter/nf_queue.c')
| -rw-r--r-- | net/netfilter/nf_queue.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c index 8a67bde8b64..d10d552d9c4 100644 --- a/net/netfilter/nf_queue.c +++ b/net/netfilter/nf_queue.c @@ -20,6 +20,8 @@ static struct nf_queue_rerouter *queue_rerouter; static DEFINE_RWLOCK(queue_handler_lock); +/* return EBUSY when somebody else is registered, return EEXIST if the + * same handler is registered, return 0 in case of success. */ int nf_register_queue_handler(int pf, struct nf_queue_handler *qh) { int ret; @@ -28,7 +30,9 @@ int nf_register_queue_handler(int pf, struct nf_queue_handler *qh) return -EINVAL; write_lock_bh(&queue_handler_lock); - if (queue_handler[pf]) + if (queue_handler[pf] == qh) + ret = -EEXIST; + else if (queue_handler[pf]) ret = -EBUSY; else { queue_handler[pf] = qh; |