Commit d16697cb authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Alexei Starovoitov
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net: skbuff: add size metadata to skb_shared_info for xdp 



Introduce xdp_frags_size field in skb_shared_info data structure
to store xdp_buff/xdp_frame frame paged size (xdp_frags_size will
be used in xdp frags support). In order to not increase
skb_shared_info size we will use a hole due to skb_shared_info
alignment.

Acked-by: default avatarToke Hoiland-Jorgensen <toke@redhat.com>
Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Acked-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/8a849819a3e0a143d540f78a3a5add76e17e980d.1642758637.git.lorenzo@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 820e6e22

include/linux/skbuff.h

+1 −0
Original line number Diff line number Diff line
@@ -557,6 +557,7 @@ struct skb_shared_info { 
	 * Warning : all fields before dataref are cleared in __alloc_skb()

	 */

	atomic_t	dataref;

	unsigned int	xdp_frags_size;



	/* Intermediate layers must ensure that destructor_arg

	 * remains valid until skb destructor */