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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>
This commit is contained in:
Marcelo Ricardo Leitner 2016-06-02 15:05:40 -03:00 committed by David S. Miller
parent 57c0565039
commit 3953c46c3a
2 changed files with 12 additions and 3 deletions
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5
include/linux/skbuff.h
View File

@ -301,6 +301,11 @@ struct sk_buff;
#endif #endif
extern int sysctl_max_skb_frags; 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; typedef struct skb_frag_struct skb_frag_t;
struct skb_frag_struct { struct skb_frag_struct {

10
net/core/skbuff.c
View File

@ -3116,9 +3116,13 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb,
int hsize; int hsize;
int size; int size;
len = head_skb->len - offset; if (unlikely(mss == GSO_BY_FRAGS)) {
if (len > mss) len = list_skb->len;
len = mss; } else {
len = head_skb->len - offset;
if (len > mss)
len = mss;
}
hsize = skb_headlen(head_skb) - offset; hsize = skb_headlen(head_skb) - offset;
if (hsize < 0) if (hsize < 0)