netpoll: allow execution of multiple rx_hooks per interface

Signed-off-by: Daniel Borkmann <danborkmann@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 3 deletions

diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index 2524267210d3..a765ea898549 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -21,15 +21,20 @@ struct netpoll {
         __be32 local_ip, remote_ip;
         u16 local_port, remote_port;
         u8 remote_mac[ETH_ALEN];
+
+        struct list_head rx; /* rx_np list element */
 };
 
 struct netpoll_info {
         atomic_t refcnt;
+
         int rx_flags;
         spinlock_t rx_lock;
-        struct netpoll *rx_np; /* netpoll that registered an rx_hook */
+        struct list_head rx_np; /* netpolls that registered an rx_hook */
+
         struct sk_buff_head arp_tx; /* list of arp requests to reply to */
         struct sk_buff_head txq;
+
         struct delayed_work tx_work;
 };
 
@@ -51,7 +56,7 @@ static inline int netpoll_rx(struct sk_buff *skb)
         unsigned long flags;
         int ret = 0;
 
-        if (!npinfo || (!npinfo->rx_np && !npinfo->rx_flags))
+        if (!npinfo || (list_empty(&npinfo->rx_np) && !npinfo->rx_flags))
                 return 0;
 
         spin_lock_irqsave(&npinfo->rx_lock, flags);
@@ -67,7 +72,7 @@ static inline int netpoll_rx_on(struct sk_buff *skb)
 {
         struct netpoll_info *npinfo = skb->dev->npinfo;
 
-        return npinfo && (npinfo->rx_np || npinfo->rx_flags);
+        return npinfo && (!list_empty(&npinfo->rx_np) || npinfo->rx_flags);
 }
 
 static inline int netpoll_receive_skb(struct sk_buff *skb)