From: Paolo Abeni <pabeni@redhat.com>
Date: Wed, 28 Jul 2021 16:24:00 +0000 (+0200)
Subject: sk_buff: track dst status in slow_gro
X-Git-Tag: accepted/tizen/unified/20230118.172025~6527^2~362^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8a886b142bd03d36612747e9aefdf0282c8b02dd;p=platform%2Fkernel%2Flinux-rpi.git

sk_buff: track dst status in slow_gro

Similar to the previous patch, but covering the dst field:
the slow_gro flag is additionally set when a dst is attached
to the skb

RFC -> v1:
 - use the existing flag instead of adding a new one

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 3ff1830..b1e5bbf 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -992,6 +992,7 @@ static inline struct dst_entry *skb_dst(const struct sk_buff *skb)
  */
 static inline void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)
 {
+	skb->slow_gro |= !!dst;
 	skb->_skb_refdst = (unsigned long)dst;
 }
 
@@ -1008,6 +1009,7 @@ static inline void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)
 static inline void skb_dst_set_noref(struct sk_buff *skb, struct dst_entry *dst)
 {
 	WARN_ON(!rcu_read_lock_held() && !rcu_read_lock_bh_held());
+	skb->slow_gro = !!dst;
 	skb->_skb_refdst = (unsigned long)dst | SKB_DST_NOREF;
 }
 
diff --git a/include/net/dst.h b/include/net/dst.h
index 75b1e73..a057319 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -277,6 +277,7 @@ static inline void skb_dst_drop(struct sk_buff *skb)
 
 static inline void __skb_dst_copy(struct sk_buff *nskb, unsigned long refdst)
 {
+	nskb->slow_gro |= !!refdst;
 	nskb->_skb_refdst = refdst;
 	if (!(nskb->_skb_refdst & SKB_DST_NOREF))
 		dst_clone(skb_dst(nskb));
@@ -316,6 +317,7 @@ static inline bool skb_dst_force(struct sk_buff *skb)
 			dst = NULL;
 
 		skb->_skb_refdst = (unsigned long)dst;
+		skb->slow_gro |= !!dst;
 	}
 
 	return skb->_skb_refdst != 0UL;