1 files changed, 33 insertions, 2 deletions

diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index 2532ce85d718..d4eb8d2e9cb7 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -44,6 +44,7 @@
 #include <xen/interface/grant_table.h>
 #include <xen/grant_table.h>
 #include <xen/xenbus.h>
+#include <linux/debugfs.h>
 
 typedef unsigned int pending_ring_idx_t;
 #define INVALID_PENDING_RING_IDX (~0U)
@@ -164,6 +165,7 @@ struct xenvif_queue { /* Per-queue data for xenvif */
         u16 dealloc_ring[MAX_PENDING_REQS];
         struct task_struct *dealloc_task;
         wait_queue_head_t dealloc_wq;
+        atomic_t inflight_packets;
 
         /* Use kthread for guest RX */
         struct task_struct *task;
@@ -175,9 +177,9 @@ struct xenvif_queue { /* Per-queue data for xenvif */
         struct xen_netif_rx_back_ring rx;
         struct sk_buff_head rx_queue;
         RING_IDX rx_last_skb_slots;
-        bool rx_queue_purge;
+        unsigned long status;
 
-        struct timer_list wake_queue;
+        struct timer_list rx_stalled;
 
         struct gnttab_copy grant_copy_op[MAX_GRANT_COPY_OPS];
 
@@ -197,6 +199,20 @@ struct xenvif_queue { /* Per-queue data for xenvif */
         struct xenvif_stats stats;
 };
 
+enum state_bit_shift {
+        /* This bit marks that the vif is connected */
+        VIF_STATUS_CONNECTED,
+        /* This bit signals the RX thread that queuing was stopped (in
+         * start_xmit), and either the timer fired or an RX interrupt came
+         */
+        QUEUE_STATUS_RX_PURGE_EVENT,
+        /* This bit tells the interrupt handler that this queue was the reason
+         * for the carrier off, so it should kick the thread. Only queues which
+         * brought it down can turn on the carrier.
+         */
+        QUEUE_STATUS_RX_STALLED
+};
+
 struct xenvif {
         /* Unique identifier for this interface. */
         domid_t          domid;
@@ -219,11 +235,16 @@ struct xenvif {
          * frontend is rogue.
          */
         bool disabled;
+        unsigned long status;
 
         /* Queues */
         struct xenvif_queue *queues;
         unsigned int num_queues; /* active queues, resource allocated */
 
+#ifdef CONFIG_DEBUG_FS
+        struct dentry *xenvif_dbg_root;
+#endif
+
         /* Miscellaneous private stuff. */
         struct net_device *dev;
 };
@@ -297,10 +318,20 @@ static inline pending_ring_idx_t nr_pending_reqs(struct xenvif_queue *queue)
 /* Callback from stack when TX packet can be released */
 void xenvif_zerocopy_callback(struct ubuf_info *ubuf, bool zerocopy_success);
 
+irqreturn_t xenvif_interrupt(int irq, void *dev_id);
+
 extern bool separate_tx_rx_irq;
 
 extern unsigned int rx_drain_timeout_msecs;
 extern unsigned int rx_drain_timeout_jiffies;
 extern unsigned int xenvif_max_queues;
 
+#ifdef CONFIG_DEBUG_FS
+extern struct dentry *xen_netback_dbg_root;
+#endif
+
+void xenvif_skb_zerocopy_prepare(struct xenvif_queue *queue,
+                                 struct sk_buff *skb);
+void xenvif_skb_zerocopy_complete(struct xenvif_queue *queue);
+
 #endif /* __XEN_NETBACK__COMMON_H__ */