net/ipv4: Introduce IPSKB_FRAG_SEGS bit to inet_skb_parm.flags
This flag indicates whether fragmentation of segments is allowed.
Formerly this policy was hardcoded according to IPSKB_FORWARDED (set by
either ip_forward or ipmr_forward).
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index e23f141..dde37fb 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -223,8 +223,10 @@
struct sk_buff *segs;
int ret = 0;
- /* common case: locally created skb or seglen is <= mtu */
- if (((IPCB(skb)->flags & IPSKB_FORWARDED) == 0) ||
+ /* common case: fragmentation of segments is not allowed,
+ * or seglen is <= mtu
+ */
+ if (((IPCB(skb)->flags & IPSKB_FRAG_SEGS) == 0) ||
skb_gso_validate_mtu(skb, mtu))
return ip_finish_output2(net, sk, skb);