#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_PARTIAL 1
-#define CHECKSUM_UNNECESSARY 2
-#define CHECKSUM_COMPLETE 3
+#define CHECKSUM_UNNECESSARY 1
+#define CHECKSUM_COMPLETE 2
+#define CHECKSUM_PARTIAL 3
#define SKB_DATA_ALIGN(X) (((X) + (SMP_CACHE_BYTES - 1)) & \
~(SMP_CACHE_BYTES - 1))
*/
struct net_device;
+struct scatterlist;
-#ifdef CONFIG_NETFILTER
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
struct nf_conntrack {
atomic_t use;
- void (*destroy)(struct nf_conntrack *);
};
+#endif
#ifdef CONFIG_BRIDGE_NETFILTER
struct nf_bridge_info {
};
#endif
-#endif
-
struct sk_buff_head {
/* These two members must be first. */
struct sk_buff *next;
* @tstamp: Time we arrived
* @dev: Device we arrived on/are leaving by
* @iif: ifindex of device we arrived on
- * @h: Transport layer header
+ * @transport_header: Transport layer header
* @network_header: Network layer header
* @mac_header: Link layer header
* @dst: destination entry
* @len: Length of actual data
* @data_len: Data length
* @mac_len: Length of link layer header
- * @csum: Checksum
+ * @csum: Checksum (must include start/offset pair)
+ * @csum_start: Offset from skb->head where checksumming should start
+ * @csum_offset: Offset from csum_start where checksum should be stored
* @local_df: allow local fragmentation
* @cloned: Head may be cloned (check refcnt to be sure)
* @nohdr: Payload reference only, must not modify header
mac_len;
union {
__wsum csum;
- __u32 csum_offset;
+ struct {
+ __u16 csum_start;
+ __u16 csum_offset;
+ };
};
__u32 priority;
__u8 local_df:1,
__be16 protocol;
void (*destructor)(struct sk_buff *skb);
-#ifdef CONFIG_NETFILTER
- struct nf_conntrack *nfct;
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+ struct nf_conntrack *nfct;
struct sk_buff *nfct_reasm;
#endif
#ifdef CONFIG_BRIDGE_NETFILTER
struct nf_bridge_info *nf_bridge;
#endif
-#endif /* CONFIG_NETFILTER */
#ifdef CONFIG_NET_SCHED
__u16 tc_index; /* traffic control index */
#ifdef CONFIG_NET_CLS_ACT
sk_buff_data_t mac_header;
/* These elements must be at the end, see alloc_skb() for details. */
sk_buff_data_t tail;
+ sk_buff_data_t end;
unsigned char *head,
- *data,
- *end;
+ *data;
unsigned int truesize;
atomic_t users;
};
extern struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
int newheadroom, int newtailroom,
gfp_t priority);
+extern int skb_to_sgvec(struct sk_buff *skb,
+ struct scatterlist *sg, int offset,
+ int len);
+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)
extern void skb_over_panic(struct sk_buff *skb, int len,
unsigned int to, struct ts_config *config,
struct ts_state *state);
+#ifdef NET_SKBUFF_DATA_USES_OFFSET
+static inline unsigned char *skb_end_pointer(const struct sk_buff *skb)
+{
+ return skb->head + skb->end;
+}
+#else
+static inline unsigned char *skb_end_pointer(const struct sk_buff *skb)
+{
+ return skb->end;
+}
+#endif
+
/* Internal */
-#define skb_shinfo(SKB) ((struct skb_shared_info *)((SKB)->end))
+#define skb_shinfo(SKB) ((struct skb_shared_info *)(skb_end_pointer(SKB)))
/**
* skb_queue_empty - check if a queue is empty
{
skb->tail = skb->data + offset;
}
+
#endif /* NET_SKBUFF_DATA_USES_OFFSET */
/*
SKB_LINEAR_ASSERT(skb);
skb->tail += len;
skb->len += len;
- if (unlikely(skb_tail_pointer(skb) > skb->end))
+ if (unlikely(skb->tail > skb->end))
skb_over_panic(skb, len, current_text_addr());
return tmp;
}
*/
static inline int skb_tailroom(const struct sk_buff *skb)
{
- return skb_is_nonlinear(skb) ? 0 : skb->end - skb_tail_pointer(skb);
+ return skb_is_nonlinear(skb) ? 0 : skb->end - skb->tail;
}
/**
prefetch(skb->next), (skb != (struct sk_buff *)(queue)); \
skb = skb->next)
+#define skb_queue_walk_safe(queue, skb, tmp) \
+ for (skb = (queue)->next, tmp = skb->next; \
+ skb != (struct sk_buff *)(queue); \
+ skb = tmp, tmp = skb->next)
+
#define skb_queue_reverse_walk(queue, skb) \
for (skb = (queue)->prev; \
prefetch(skb->prev), (skb != (struct sk_buff *)(queue)); \
int len, __wsum csum);
extern int skb_copy_bits(const struct sk_buff *skb, int offset,
void *to, int len);
-extern int skb_store_bits(const struct sk_buff *skb, int offset,
- void *from, int len);
+extern int skb_store_bits(struct sk_buff *skb, int offset,
+ const void *from, int len);
extern __wsum skb_copy_and_csum_bits(const struct sk_buff *skb,
int offset, u8 *to, int len,
__wsum csum);
return buffer;
}
+static inline void skb_copy_from_linear_data(const struct sk_buff *skb,
+ void *to,
+ const unsigned int len)
+{
+ memcpy(to, skb->data, len);
+}
+
+static inline void skb_copy_from_linear_data_offset(const struct sk_buff *skb,
+ const int offset, void *to,
+ const unsigned int len)
+{
+ memcpy(to, skb->data + offset, len);
+}
+
+static inline void skb_copy_to_linear_data(struct sk_buff *skb,
+ const void *from,
+ const unsigned int len)
+{
+ memcpy(skb->data, from, len);
+}
+
+static inline void skb_copy_to_linear_data_offset(struct sk_buff *skb,
+ const int offset,
+ const void *from,
+ const unsigned int len)
+{
+ memcpy(skb->data + offset, from, len);
+}
+
extern void skb_init(void);
-extern void skb_add_mtu(int mtu);
/**
* skb_get_timestamp - get timestamp from a skb
skb->tstamp = ktime_get_real();
}
+static inline ktime_t net_timedelta(ktime_t t)
+{
+ return ktime_sub(ktime_get_real(), t);
+}
+
extern __sum16 __skb_checksum_complete_head(struct sk_buff *skb, int len);
extern __sum16 __skb_checksum_complete(struct sk_buff *skb);
+static inline int skb_csum_unnecessary(const struct sk_buff *skb)
+{
+ return skb->ip_summed & CHECKSUM_UNNECESSARY;
+}
+
/**
* skb_checksum_complete - Calculate checksum of an entire packet
* @skb: packet to process
*/
static inline unsigned int skb_checksum_complete(struct sk_buff *skb)
{
- return skb->ip_summed != CHECKSUM_UNNECESSARY &&
- __skb_checksum_complete(skb);
+ return skb_csum_unnecessary(skb) ?
+ 0 : __skb_checksum_complete(skb);
}
-#ifdef CONFIG_NETFILTER
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+extern void nf_conntrack_destroy(struct nf_conntrack *nfct);
static inline void nf_conntrack_put(struct nf_conntrack *nfct)
{
if (nfct && atomic_dec_and_test(&nfct->use))
- nfct->destroy(nfct);
+ nf_conntrack_destroy(nfct);
}
static inline void nf_conntrack_get(struct nf_conntrack *nfct)
{
if (nfct)
atomic_inc(&nfct->use);
}
-#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
static inline void nf_conntrack_get_reasm(struct sk_buff *skb)
{
if (skb)
#endif /* CONFIG_BRIDGE_NETFILTER */
static inline void nf_reset(struct sk_buff *skb)
{
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
nf_conntrack_put(skb->nfct);
skb->nfct = NULL;
-#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
nf_conntrack_put_reasm(skb->nfct_reasm);
skb->nfct_reasm = NULL;
#endif
/* Note: This doesn't put any conntrack and bridge info in dst. */
static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src)
{
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
dst->nfct = src->nfct;
nf_conntrack_get(src->nfct);
dst->nfctinfo = src->nfctinfo;
-#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
dst->nfct_reasm = src->nfct_reasm;
nf_conntrack_get_reasm(src->nfct_reasm);
#endif
static inline void nf_copy(struct sk_buff *dst, const struct sk_buff *src)
{
- nf_conntrack_put(dst->nfct);
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+ nf_conntrack_put(dst->nfct);
nf_conntrack_put_reasm(dst->nfct_reasm);
#endif
#ifdef CONFIG_BRIDGE_NETFILTER
__nf_copy(dst, src);
}
-#else /* CONFIG_NETFILTER */
-static inline void nf_reset(struct sk_buff *skb) {}
-static inline void __nf_copy(struct sk_buff *dst, const struct sk_buff *src) {}
-static inline void nf_copy(struct sk_buff *dst, const struct sk_buff *src) {}
-#endif /* CONFIG_NETFILTER */
-
#ifdef CONFIG_NETWORK_SECMARK
static inline void skb_copy_secmark(struct sk_buff *to, const struct sk_buff *from)
{
return skb_shinfo(skb)->gso_size;
}
+static inline void skb_forward_csum(struct sk_buff *skb)
+{
+ /* Unfortunately we don't support this one. Any brave souls? */
+ if (skb->ip_summed == CHECKSUM_COMPLETE)
+ skb->ip_summed = CHECKSUM_NONE;
+}
+
#endif /* __KERNEL__ */
#endif /* _LINUX_SKBUFF_H */