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    Subject[PATCH v15 01/17] Add a new structure for skb buffer from external.
    Date
    From: Xin Xiaohui <xiaohui.xin@intel.com>

    Signed-off-by: Xin Xiaohui <xiaohui.xin@intel.com>
    Signed-off-by: Zhao Yu <yzhao81new@gmail.com>
    Reviewed-by: Jeff Dike <jdike@linux.intel.com>
    ---
    include/linux/skbuff.h | 9 +++++++++
    1 files changed, 9 insertions(+), 0 deletions(-)

    diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
    index 77eb60d..696e690 100644
    --- a/include/linux/skbuff.h
    +++ b/include/linux/skbuff.h
    @@ -211,6 +211,15 @@ struct skb_shared_info {
    skb_frag_t frags[MAX_SKB_FRAGS];
    };

    +/* The structure is for a skb which pages may point to
    + * an external buffer, which is not allocated from kernel space.
    + * It also contains a destructor for itself.
    + */
    +struct skb_ext_page {
    + struct page *page;
    + void (*dtor)(struct skb_ext_page *);
    +};
    +
    /* We divide dataref into two halves. The higher 16 bits hold references
    * to the payload part of skb->data. The lower 16 bits hold references to
    * the entire skb->data. A clone of a headerless skb holds the length of
    --
    1.7.3


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