Commit ee039871 authored by David S. Miller's avatar David S. Miller

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: default avatarDavid S. Miller <davem@davemloft.net>
parent 05f77f85
......@@ -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,
......
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