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Commit 3953c46c authored Jun 02, 2016 by Marcelo Ricardo Leitner Committed by David S. Miller Jun 03, 2016

sk_buff: allow segmenting based on frag sizes



This patch allows segmenting a skb based on its frags sizes instead of
based on a fixed value.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Tested-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 57c05650

include/linux/skbuff.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -301,6 +301,11 @@ struct sk_buff;
		#endif
		extern int sysctl_max_skb_frags;

		/* Set skb_shinfo(skb)->gso_size to this in case you want skb_segment to
		* segment using its current segmentation instead.
		*/
		#define GSO_BY_FRAGS 0xFFFF

		typedef struct skb_frag_struct skb_frag_t;

		struct skb_frag_struct {

net/core/skbuff.c

+7 −3

Original line number	Diff line number	Diff line
		@@ -3116,9 +3116,13 @@ struct sk_buff skb_segment(struct sk_buff head_skb,
		int hsize;
		int size;

		if (unlikely(mss == GSO_BY_FRAGS)) {
		len = list_skb->len;
		} else {
		len = head_skb->len - offset;
		if (len > mss)
		len = mss;
		}

		hsize = skb_headlen(head_skb) - offset;
		if (hsize < 0)