diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2012-07-20 09:23:07 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-30 20:01:33 -0700 |
| commit | 1f29351617ffe827edf80ffdfdef2da3a2494f96 (patch) | |
| tree | 61af1c6d0e19add8ec09856334928337276fa5e0 /include | |
| parent | a97df3f22b83742deb9191d53928641ec3befb6e (diff) | |
skbuff: add an api to orphan frags
commit a353e0ce0fd42d8859260666d1e9b10f2abd4698 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -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 0884db3d315..e22df7a4f1a 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1674,6 +1674,22 @@ static inline void skb_orphan(struct sk_buff *skb) } /** + * 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 * @list: list to empty * |