diff options
author | Michael S. Tsirkin <mst@redhat.com> | 2012-07-20 05:23:07 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2012-07-22 15:39:33 -0400 |
commit | a353e0ce0fd42d8859260666d1e9b10f2abd4698 (patch) | |
tree | 3c7e5807d36bec7e774ab164598ff34638681e31 | |
parent | d47e12d63e745f667a977226c3f59ae14521592d (diff) |
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: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | include/linux/skbuff.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 642cb7355df3..d205c4be7f5b 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h | |||
@@ -1667,6 +1667,22 @@ static inline void skb_orphan(struct sk_buff *skb) | |||
1667 | } | 1667 | } |
1668 | 1668 | ||
1669 | /** | 1669 | /** |
1670 | * skb_orphan_frags - orphan the frags contained in a buffer | ||
1671 | * @skb: buffer to orphan frags from | ||
1672 | * @gfp_mask: allocation mask for replacement pages | ||
1673 | * | ||
1674 | * For each frag in the SKB which needs a destructor (i.e. has an | ||
1675 | * owner) create a copy of that frag and release the original | ||
1676 | * page by calling the destructor. | ||
1677 | */ | ||
1678 | static inline int skb_orphan_frags(struct sk_buff *skb, gfp_t gfp_mask) | ||
1679 | { | ||
1680 | if (likely(!(skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY))) | ||
1681 | return 0; | ||
1682 | return skb_copy_ubufs(skb, gfp_mask); | ||
1683 | } | ||
1684 | |||
1685 | /** | ||
1670 | * __skb_queue_purge - empty a list | 1686 | * __skb_queue_purge - empty a list |
1671 | * @list: list to empty | 1687 | * @list: list to empty |
1672 | * | 1688 | * |