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authorDavid S. Miller <davem@davemloft.net>2009-06-09 03:17:13 -0400
committerDavid S. Miller <davem@davemloft.net>2009-06-09 03:17:13 -0400
commitee0398717078260ee4ffa97d407071bc774e2dac (patch)
tree57dff8cfd1c2dde383f3fcb49cdb8eb7b7d640a7 /include
parent05f77f85f47e30a53f7971b687f3b0250e42f665 (diff)
skbuff: Add frag list abstraction interfaces.
With the hope that these can be used to eliminate direct references to the frag list implementation. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/skbuff.h21
1 files changed, 20 insertions, 1 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index aad484cd5863..f1c93b878b3b 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1077,7 +1077,7 @@ extern void skb_add_rx_frag(struct sk_buff *skb, int i, struct page *page,
1077 int off, int size); 1077 int off, int size);
1078 1078
1079#define SKB_PAGE_ASSERT(skb) BUG_ON(skb_shinfo(skb)->nr_frags) 1079#define SKB_PAGE_ASSERT(skb) BUG_ON(skb_shinfo(skb)->nr_frags)
1080#define SKB_FRAG_ASSERT(skb) BUG_ON(skb_shinfo(skb)->frag_list) 1080#define SKB_FRAG_ASSERT(skb) BUG_ON(skb_has_frags(skb))
1081#define SKB_LINEAR_ASSERT(skb) BUG_ON(skb_is_nonlinear(skb)) 1081#define SKB_LINEAR_ASSERT(skb) BUG_ON(skb_is_nonlinear(skb))
1082 1082
1083#ifdef NET_SKBUFF_DATA_USES_OFFSET 1083#ifdef NET_SKBUFF_DATA_USES_OFFSET
@@ -1716,6 +1716,25 @@ static inline int pskb_trim_rcsum(struct sk_buff *skb, unsigned int len)
1716 skb = skb->prev) 1716 skb = skb->prev)
1717 1717
1718 1718
1719static inline bool skb_has_frags(const struct sk_buff *skb)
1720{
1721 return skb_shinfo(skb)->frag_list != NULL;
1722}
1723
1724static inline void skb_frag_list_init(struct sk_buff *skb)
1725{
1726 skb_shinfo(skb)->frag_list = NULL;
1727}
1728
1729static inline void skb_frag_add_head(struct sk_buff *skb, struct sk_buff *frag)
1730{
1731 frag->next = skb_shinfo(skb)->frag_list;
1732 skb_shinfo(skb)->frag_list = frag;
1733}
1734
1735#define skb_walk_frags(skb, iter) \
1736 for (iter = skb_shinfo(skb)->frag_list; iter; iter = iter->next)
1737
1719extern struct sk_buff *__skb_recv_datagram(struct sock *sk, unsigned flags, 1738extern struct sk_buff *__skb_recv_datagram(struct sock *sk, unsigned flags,
1720 int *peeked, int *err); 1739 int *peeked, int *err);
1721extern struct sk_buff *skb_recv_datagram(struct sock *sk, unsigned flags, 1740extern struct sk_buff *skb_recv_datagram(struct sock *sk, unsigned flags,