[RFC][PATCH v6 01/19] Add a new structure for skb buffer from external.
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From: xiaohui.xin on 21 May 2010 05:30 From: Xin Xiaohui <xiaohui.xin(a)intel.com> Signed-off-by: Xin Xiaohui <xiaohui.xin(a)intel.com> Signed-off-by: Zhao Yu <yzhao81new(a)gmail.com> Reviewed-by: Jeff Dike <jdike(a)linux.intel.com> --- include/linux/skbuff.h | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 124f90c..cf309c9 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -203,6 +203,18 @@ struct skb_shared_info { void * destructor_arg; }; +/* The structure is for a skb which skb->data may point to + * an external buffer, which is not allocated from kernel space. + * Since the buffer is external, then the shinfo or frags are + * also extern too. It also contains a destructor for itself. + */ +struct skb_external_page { + u8 *start; + int size; + struct skb_frag_struct *frags; + struct skb_shared_info *ushinfo; + void (*dtor)(struct skb_external_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 -- 1.5.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |