On 10/09/2021 18.14, Lorenzo Bianconi wrote:
Introduce xdp_frags_truesize field in skb_shared_info data structure
to store xdp_buff/xdp_frame truesize (xdp_frags_truesize will be used
in xdp multi-buff support). In order to not increase skb_shared_info
size we will use a hole due to skb_shared_info alignment.
Introduce xdp_frags_size field in skb_shared_info data structure
reusing gso_type field in order to store xdp_buff/xdp_frame paged size.
xdp_frags_size will be used in xdp multi-buff support.
Acked-by: John Fastabend <john.fastabend@xxxxxxxxx>
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
include/linux/skbuff.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
Acked-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 6bdb0db3e825..769ffd09f975 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -522,13 +522,17 @@ struct skb_shared_info {
unsigned short gso_segs;
struct sk_buff *frag_list;
struct skb_shared_hwtstamps hwtstamps;
- unsigned int gso_type;
+ union {
+ unsigned int gso_type;
+ unsigned int xdp_frags_size;
+ };
u32 tskey;
/*
* Warning : all fields before dataref are cleared in __alloc_skb()
*/
atomic_t dataref;
+ unsigned int xdp_frags_truesize;
/* Intermediate layers must ensure that destructor_arg
* remains valid until skb destructor */
