1 files changed, 113 insertions, 11 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 9dcf956ad18a..bb1981fd60f3 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -29,9 +29,6 @@
 #include <linux/dmaengine.h>
 #include <linux/hrtimer.h>
 
-#define HAVE_ALLOC_SKB          /* For the drivers to know */
-#define HAVE_ALIGNABLE_SKB      /* Ditto 8)                */
-
 /* Don't change this without changing skb_csum_unnecessary! */
 #define CHECKSUM_NONE 0
 #define CHECKSUM_UNNECESSARY 1
@@ -135,6 +132,55 @@ struct skb_frag_struct {
         __u32 size;
 };
 
+#define HAVE_HW_TIME_STAMP
+
+/**
+ * struct skb_shared_hwtstamps - hardware time stamps
+ * @hwtstamp:   hardware time stamp transformed into duration
+ *              since arbitrary point in time
+ * @syststamp:  hwtstamp transformed to system time base
+ *
+ * Software time stamps generated by ktime_get_real() are stored in
+ * skb->tstamp. The relation between the different kinds of time
+ * stamps is as follows:
+ *
+ * syststamp and tstamp can be compared against each other in
+ * arbitrary combinations.  The accuracy of a
+ * syststamp/tstamp/"syststamp from other device" comparison is
+ * limited by the accuracy of the transformation into system time
+ * base. This depends on the device driver and its underlying
+ * hardware.
+ *
+ * hwtstamps can only be compared against other hwtstamps from
+ * the same device.
+ *
+ * This structure is attached to packets as part of the
+ * &skb_shared_info. Use skb_hwtstamps() to get a pointer.
+ */
+struct skb_shared_hwtstamps {
+        ktime_t hwtstamp;
+        ktime_t syststamp;
+};
+
+/**
+ * struct skb_shared_tx - instructions for time stamping of outgoing packets
+ * @hardware:           generate hardware time stamp
+ * @software:           generate software time stamp
+ * @in_progress:        device driver is going to provide
+ *                      hardware time stamp
+ *
+ * These flags are attached to packets as part of the
+ * &skb_shared_info. Use skb_tx() to get a pointer.
+ */
+union skb_shared_tx {
+        struct {
+                __u8    hardware:1,
+                        software:1,
+                        in_progress:1;
+        };
+        __u8 flags;
+};
+
 /* This data is invariant across clones and lives at
  * the end of the header data, ie. at skb->end.
  */
@@ -146,10 +192,12 @@ struct skb_shared_info {
         unsigned short  gso_segs;
         unsigned short  gso_type;
         __be32          ip6_frag_id;
+        union skb_shared_tx tx_flags;
 #ifdef CONFIG_HAS_DMA
         unsigned int    num_dma_maps;
 #endif
         struct sk_buff  *frag_list;
+        struct skb_shared_hwtstamps hwtstamps;
         skb_frag_t      frags[MAX_SKB_FRAGS];
 #ifdef CONFIG_HAS_DMA
         dma_addr_t      dma_maps[MAX_SKB_FRAGS + 1];
@@ -373,6 +421,7 @@ extern void skb_dma_unmap(struct device *dev, struct sk_buff *skb,
 #endif
 
 extern void kfree_skb(struct sk_buff *skb);
+extern void consume_skb(struct sk_buff *skb);
 extern void            __kfree_skb(struct sk_buff *skb);
 extern struct sk_buff *__alloc_skb(unsigned int size,
                                    gfp_t priority, int fclone, int node);
@@ -411,7 +460,8 @@ extern int	       skb_to_sgvec(struct sk_buff *skb,
 extern int             skb_cow_data(struct sk_buff *skb, int tailbits,
                                     struct sk_buff **trailer);
 extern int             skb_pad(struct sk_buff *skb, int pad);
-#define dev_kfree_skb(a)        kfree_skb(a)
+#define dev_kfree_skb(a)        consume_skb(a)
+#define dev_consume_skb(a)      kfree_skb_clean(a)
 extern void           skb_over_panic(struct sk_buff *skb, int len,
                                      void *here);
 extern void           skb_under_panic(struct sk_buff *skb, int len,
@@ -459,6 +509,16 @@ static inline unsigned char *skb_end_pointer(const struct sk_buff *skb)
 /* Internal */
 #define skb_shinfo(SKB) ((struct skb_shared_info *)(skb_end_pointer(SKB)))
 
+static inline struct skb_shared_hwtstamps *skb_hwtstamps(struct sk_buff *skb)
+{
+        return &skb_shinfo(skb)->hwtstamps;
+}
+
+static inline union skb_shared_tx *skb_tx(struct sk_buff *skb)
+{
+        return &skb_shinfo(skb)->tx_flags;
+}
+
 /**
  *      skb_queue_empty - check if a queue is empty
  *      @list: queue head
@@ -1278,7 +1338,7 @@ static inline int skb_network_offset(const struct sk_buff *skb)
  * The networking layer reserves some headroom in skb data (via
  * dev_alloc_skb). This is used to avoid having to reallocate skb data when
  * the header has to grow. In the default case, if the header has to grow
- * 16 bytes or less we avoid the reallocation.
+ * 32 bytes or less we avoid the reallocation.
  *
  * Unfortunately this headroom changes the DMA alignment of the resulting
  * network packet. As for NET_IP_ALIGN, this unaligned DMA is expensive
@@ -1286,11 +1346,11 @@ static inline int skb_network_offset(const struct sk_buff *skb)
  * perhaps setting it to a cacheline in size (since that will maintain
  * cacheline alignment of the DMA). It must be a power of 2.
  *
- * Various parts of the networking layer expect at least 16 bytes of
+ * Various parts of the networking layer expect at least 32 bytes of
  * headroom, you should not reduce this.
  */
 #ifndef NET_SKB_PAD
-#define NET_SKB_PAD     16
+#define NET_SKB_PAD     32
 #endif
 
 extern int ___pskb_trim(struct sk_buff *skb, unsigned int len);
@@ -1678,8 +1738,6 @@ extern int	       skb_shift(struct sk_buff *tgt, struct sk_buff *skb,
                                  int shiftlen);
 
 extern struct sk_buff *skb_segment(struct sk_buff *skb, int features);
-extern int             skb_gro_receive(struct sk_buff **head,
-                                       struct sk_buff *skb);
 
 static inline void *skb_header_pointer(const struct sk_buff *skb, int offset,
                                        int len, void *buffer)
@@ -1726,6 +1784,11 @@ static inline void skb_copy_to_linear_data_offset(struct sk_buff *skb,
 
 extern void skb_init(void);
 
+static inline ktime_t skb_get_ktime(const struct sk_buff *skb)
+{
+        return skb->tstamp;
+}
+
 /**
  *      skb_get_timestamp - get timestamp from a skb
  *      @skb: skb to get stamp from
@@ -1735,11 +1798,18 @@ extern void skb_init(void);
  *      This function converts the offset back to a struct timeval and stores
  *      it in stamp.
  */
-static inline void skb_get_timestamp(const struct sk_buff *skb, struct timeval *stamp)
+static inline void skb_get_timestamp(const struct sk_buff *skb,
+                                     struct timeval *stamp)
 {
         *stamp = ktime_to_timeval(skb->tstamp);
 }
 
+static inline void skb_get_timestampns(const struct sk_buff *skb,
+                                       struct timespec *stamp)
+{
+        *stamp = ktime_to_timespec(skb->tstamp);
+}
+
 static inline void __net_timestamp(struct sk_buff *skb)
 {
         skb->tstamp = ktime_get_real();
@@ -1755,6 +1825,20 @@ static inline ktime_t net_invalid_timestamp(void)
         return ktime_set(0, 0);
 }
 
+/**
+ * skb_tstamp_tx - queue clone of skb with send time stamps
+ * @orig_skb:   the original outgoing packet
+ * @hwtstamps:  hardware time stamps, may be NULL if not available
+ *
+ * If the skb has a socket associated, then this function clones the
+ * skb (thus sharing the actual data and optional structures), stores
+ * the optional hardware time stamping information (if non NULL) or
+ * generates a software time stamp (otherwise), then queues the clone
+ * to the error queue of the socket.  Errors are silently ignored.
+ */
+extern void skb_tstamp_tx(struct sk_buff *orig_skb,
+                        struct skb_shared_hwtstamps *hwtstamps);
+
 extern __sum16 __skb_checksum_complete_head(struct sk_buff *skb, int len);
 extern __sum16 __skb_checksum_complete(struct sk_buff *skb);
 
@@ -1885,7 +1969,7 @@ static inline void skb_set_queue_mapping(struct sk_buff *skb, u16 queue_mapping)
         skb->queue_mapping = queue_mapping;
 }
 
-static inline u16 skb_get_queue_mapping(struct sk_buff *skb)
+static inline u16 skb_get_queue_mapping(const struct sk_buff *skb)
 {
         return skb->queue_mapping;
 }
@@ -1895,6 +1979,24 @@ static inline void skb_copy_queue_mapping(struct sk_buff *to, const struct sk_bu
         to->queue_mapping = from->queue_mapping;
 }
 
+static inline void skb_record_rx_queue(struct sk_buff *skb, u16 rx_queue)
+{
+        skb->queue_mapping = rx_queue + 1;
+}
+
+static inline u16 skb_get_rx_queue(const struct sk_buff *skb)
+{
+        return skb->queue_mapping - 1;
+}
+
+static inline bool skb_rx_queue_recorded(const struct sk_buff *skb)
+{
+        return (skb->queue_mapping != 0);
+}
+
+extern u16 skb_tx_hash(const struct net_device *dev,
+                       const struct sk_buff *skb);
+
 #ifdef CONFIG_XFRM
 static inline struct sec_path *skb_sec_path(struct sk_buff *skb)
 {