Commit a353e0ce authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by David S. Miller

skbuff: add an api to orphan frags

Many places do
       if ((skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY))
		skb_copy_ubufs(skb, gfp_mask);
to copy and invoke frag destructors if necessary.
Add an inline helper for this.
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d47e12d6
...@@ -1666,6 +1666,22 @@ static inline void skb_orphan(struct sk_buff *skb) ...@@ -1666,6 +1666,22 @@ static inline void skb_orphan(struct sk_buff *skb)
skb->sk = NULL; skb->sk = NULL;
} }
/**
* skb_orphan_frags - orphan the frags contained in a buffer
* @skb: buffer to orphan frags from
* @gfp_mask: allocation mask for replacement pages
*
* For each frag in the SKB which needs a destructor (i.e. has an
* owner) create a copy of that frag and release the original
* page by calling the destructor.
*/
static inline int skb_orphan_frags(struct sk_buff *skb, gfp_t gfp_mask)
{
if (likely(!(skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY)))
return 0;
return skb_copy_ubufs(skb, gfp_mask);
}
/** /**
* __skb_queue_purge - empty a list * __skb_queue_purge - empty a list
* @list: list to empty * @list: list to empty
......
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