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@xxxxxxxxx>
Tested-by: Xin Long <lucien.xin@xxxxxxxxx>
---
include/linux/skbuff.h | 5 +++++
net/core/skbuff.c | 10 +++++++---
2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index ee38a41274759f279be1c0752a7fab63fac517c8..329a0a9ef67115cae03b7c1304de031116384148 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -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 {
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 4724bcf9b0cae1cecbe5bc2c04e308bb70b3232a..97c32c75e704af1f31b064e8f1e0475ff1505d67 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3116,9 +3116,13 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb,
int hsize;
int size;
- len = head_skb->len - offset;
- if (len > mss)
- len = mss;
+ 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)
--
2.5.5
--
To unsubscribe from this list: send the line "unsubscribe linux-sctp" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
