Re: [PATCH net-next v8 02/14] net: skb: introduce skb_data_area_size()
flat view
From: Jakub Kicinski <kuba@kernel.org>
Date: 2022-05-09 16:49:38
Also in:
linux-wireless
On Fri, 6 May 2022 11:12:58 -0700 Ricardo Martinez wrote:
quoted hunk ↗ jump to hunk
Helper to calculate the linear data space in the skb. Signed-off-by: Ricardo Martinez <ricardo.martinez@linux.intel.com> Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com> --- include/linux/skbuff.h | 5 +++++ 1 file changed, 5 insertions(+)diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 5c2599e3fe7d..d58669d6cb91 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h@@ -1665,6 +1665,11 @@ static inline void skb_set_end_offset(struct sk_buff *skb, unsigned int offset) } #endif +static inline unsigned int skb_data_area_size(struct sk_buff *skb) +{ + return skb_end_pointer(skb) - skb->data; +}
Not a great name, skb->data_len is the length of paged data. There is no such thing as "data area", data is just a pointer somewhere into skb->head. Why do you need this? Why can't you use the size you passed to the dev_alloc_skb() like everyone else?