Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[linux-2.6] / include / linux / skbuff.h

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index af4f02e98243714953b95b0aeb66f718e12b5dbe..8f5d9e7f8734abf0307483998c27f4faca71f47c 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -155,16 +155,27 @@ struct skb_shared_info {
 #define SKB_DATAREF_SHIFT 16
 #define SKB_DATAREF_MASK ((1 << SKB_DATAREF_SHIFT) - 1)
 
+struct skb_timeval {
+       u32     off_sec;
+       u32     off_usec;
+};
+
+
+enum {
+       SKB_FCLONE_UNAVAILABLE,
+       SKB_FCLONE_ORIG,
+       SKB_FCLONE_CLONE,
+};
+
 /** 
  *     struct sk_buff - socket buffer
  *     @next: Next buffer in list
  *     @prev: Previous buffer in list
  *     @list: List we are on
  *     @sk: Socket we are owned by
- *     @stamp: Time we arrived
+ *     @tstamp: Time we arrived
  *     @dev: Device we arrived on/are leaving by
  *     @input_dev: Device we arrived on
- *      @real_dev: The real device we are using
  *     @h: Transport layer header
  *     @nh: Network layer header
  *     @mac: Link layer header
@@ -203,10 +214,9 @@ struct sk_buff {
        struct sk_buff          *prev;
 
        struct sock             *sk;
-       struct timeval          stamp;
+       struct skb_timeval      tstamp;
        struct net_device       *dev;
        struct net_device       *input_dev;
-       struct net_device       *real_dev;
 
        union {
                struct tcphdr   *th;
@@ -250,7 +260,8 @@ struct sk_buff {
                                ip_summed:2,
                                nohdr:1,
                                nfctinfo:3;
-       __u8                    pkt_type;
+       __u8                    pkt_type:3,
+                               fclone:2;
        __be16                  protocol;
 
        void                    (*destructor)(struct sk_buff *skb);
@@ -290,26 +301,38 @@ struct sk_buff {
 #include <asm/system.h>
 
 extern void           __kfree_skb(struct sk_buff *skb);
-extern struct sk_buff *alloc_skb(unsigned int size,
-                                unsigned int __nocast priority);
+extern struct sk_buff *__alloc_skb(unsigned int size,
+                                  gfp_t priority, int fclone);
+static inline struct sk_buff *alloc_skb(unsigned int size,
+                                       gfp_t priority)
+{
+       return __alloc_skb(size, priority, 0);
+}
+
+static inline struct sk_buff *alloc_skb_fclone(unsigned int size,
+                                              gfp_t priority)
+{
+       return __alloc_skb(size, priority, 1);
+}
+
 extern struct sk_buff *alloc_skb_from_cache(kmem_cache_t *cp,
                                            unsigned int size,
-                                           unsigned int __nocast priority);
+                                           gfp_t priority);
 extern void           kfree_skbmem(struct sk_buff *skb);
 extern struct sk_buff *skb_clone(struct sk_buff *skb,
-                                unsigned int __nocast priority);
+                                gfp_t priority);
 extern struct sk_buff *skb_copy(const struct sk_buff *skb,
-                               unsigned int __nocast priority);
+                               gfp_t priority);
 extern struct sk_buff *pskb_copy(struct sk_buff *skb,
-                                unsigned int __nocast gfp_mask);
+                                gfp_t gfp_mask);
 extern int            pskb_expand_head(struct sk_buff *skb,
                                        int nhead, int ntail,
-                                       unsigned int __nocast gfp_mask);
+                                       gfp_t gfp_mask);
 extern struct sk_buff *skb_realloc_headroom(struct sk_buff *skb,
                                            unsigned int headroom);
 extern struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
                                       int newheadroom, int newtailroom,
-                                      unsigned int __nocast priority);
+                                      gfp_t priority);
 extern struct sk_buff *                skb_pad(struct sk_buff *skb, int pad);
 #define dev_kfree_skb(a)       kfree_skb(a)
 extern void          skb_over_panic(struct sk_buff *skb, int len,
@@ -461,7 +484,7 @@ static inline int skb_shared(const struct sk_buff *skb)
  *     NULL is returned on a memory allocation failure.
  */
 static inline struct sk_buff *skb_share_check(struct sk_buff *skb,
-                                             unsigned int __nocast pri)
+                                             gfp_t pri)
 {
        might_sleep_if(pri & __GFP_WAIT);
        if (skb_shared(skb)) {
@@ -493,7 +516,7 @@ static inline struct sk_buff *skb_share_check(struct sk_buff *skb,
  *     %NULL is returned on a memory allocation failure.
  */
 static inline struct sk_buff *skb_unshare(struct sk_buff *skb,
-                                         unsigned int __nocast pri)
+                                         gfp_t pri)
 {
        might_sleep_if(pri & __GFP_WAIT);
        if (skb_cloned(skb)) {
@@ -994,7 +1017,7 @@ static inline void __skb_queue_purge(struct sk_buff_head *list)
  *     %NULL is returned in there is no free memory.
  */
 static inline struct sk_buff *__dev_alloc_skb(unsigned int length,
-                                             unsigned int __nocast gfp_mask)
+                                             gfp_t gfp_mask)
 {
        struct sk_buff *skb = alloc_skb(length + 16, gfp_mask);
        if (likely(skb))
@@ -1107,8 +1130,8 @@ static inline int skb_can_coalesce(struct sk_buff *skb, int i,
  *     If there is no free memory -ENOMEM is returned, otherwise zero
  *     is returned and the old skb data released.
  */
-extern int __skb_linearize(struct sk_buff *skb, unsigned int __nocast gfp);
-static inline int skb_linearize(struct sk_buff *skb, unsigned int __nocast gfp)
+extern int __skb_linearize(struct sk_buff *skb, gfp_t gfp);
+static inline int skb_linearize(struct sk_buff *skb, gfp_t gfp)
 {
        return __skb_linearize(skb, gfp);
 }
@@ -1142,7 +1165,7 @@ static inline void skb_postpull_rcsum(struct sk_buff *skb,
 
 static inline int pskb_trim_rcsum(struct sk_buff *skb, unsigned int len)
 {
-       if (len >= skb->len)
+       if (likely(len >= skb->len))
                return 0;
        if (skb->ip_summed == CHECKSUM_HW)
                skb->ip_summed = CHECKSUM_NONE;
@@ -1198,6 +1221,8 @@ extern void              skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to);
 extern void           skb_split(struct sk_buff *skb,
                                 struct sk_buff *skb1, const u32 len);
 
+extern void           skb_release_data(struct sk_buff *skb);
+
 static inline void *skb_header_pointer(const struct sk_buff *skb, int offset,
                                       int len, void *buffer)
 {
@@ -1215,6 +1240,38 @@ static inline void *skb_header_pointer(const struct sk_buff *skb, int offset,
 extern void skb_init(void);
 extern void skb_add_mtu(int mtu);
 
+/**
+ *     skb_get_timestamp - get timestamp from a skb
+ *     @skb: skb to get stamp from
+ *     @stamp: pointer to struct timeval to store stamp in
+ *
+ *     Timestamps are stored in the skb as offsets to a base timestamp.
+ *     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)
+{
+       stamp->tv_sec  = skb->tstamp.off_sec;
+       stamp->tv_usec = skb->tstamp.off_usec;
+}
+
+/**
+ *     skb_set_timestamp - set timestamp of a skb
+ *     @skb: skb to set stamp of
+ *     @stamp: pointer to struct timeval to get stamp from
+ *
+ *     Timestamps are stored in the skb as offsets to a base timestamp.
+ *     This function converts a struct timeval to an offset and stores
+ *     it in the skb.
+ */
+static inline void skb_set_timestamp(struct sk_buff *skb, const struct timeval *stamp)
+{
+       skb->tstamp.off_sec  = stamp->tv_sec;
+       skb->tstamp.off_usec = stamp->tv_usec;
+}
+
+extern void __net_timestamp(struct sk_buff *skb);
+
 #ifdef CONFIG_NETFILTER
 static inline void nf_conntrack_put(struct nf_conntrack *nfct)
 {