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| author | David S. Miller <davem@davemloft.net> | 2009-06-09 00:17:13 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-06-09 00:17:13 -0700 |
| commit | ee0398717078260ee4ffa97d407071bc774e2dac (patch) | |
| tree | 57dff8cfd1c2dde383f3fcb49cdb8eb7b7d640a7 | |
| parent | 05f77f85f47e30a53f7971b687f3b0250e42f665 (diff) | |
| download | linux-ee0398717078260ee4ffa97d407071bc774e2dac.tar.bz2 | |
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>
| -rw-r--r-- | include/linux/skbuff.h | 21 |
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, int off, int size); #define SKB_PAGE_ASSERT(skb) BUG_ON(skb_shinfo(skb)->nr_frags) -#define SKB_FRAG_ASSERT(skb) BUG_ON(skb_shinfo(skb)->frag_list) +#define SKB_FRAG_ASSERT(skb) BUG_ON(skb_has_frags(skb)) #define SKB_LINEAR_ASSERT(skb) BUG_ON(skb_is_nonlinear(skb)) #ifdef NET_SKBUFF_DATA_USES_OFFSET @@ -1716,6 +1716,25 @@ static inline int pskb_trim_rcsum(struct sk_buff *skb, unsigned int len) skb = skb->prev) +static inline bool skb_has_frags(const struct sk_buff *skb) +{ + return skb_shinfo(skb)->frag_list != NULL; +} + +static inline void skb_frag_list_init(struct sk_buff *skb) +{ + skb_shinfo(skb)->frag_list = NULL; +} + +static inline void skb_frag_add_head(struct sk_buff *skb, struct sk_buff *frag) +{ + frag->next = skb_shinfo(skb)->frag_list; + skb_shinfo(skb)->frag_list = frag; +} + +#define skb_walk_frags(skb, iter) \ + for (iter = skb_shinfo(skb)->frag_list; iter; iter = iter->next) + extern struct sk_buff *__skb_recv_datagram(struct sock *sk, unsigned flags, int *peeked, int *err); extern struct sk_buff *skb_recv_datagram(struct sock *sk, unsigned flags, |