From: Ricardo Martinez <ricardo.martinez@linux.intel.com>
Date: Fri, 6 May 2022 18:12:58 +0000 (-0700)
Subject: net: skb: introduce skb_data_area_size()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a4ff365346c98081311c299955d91d657123e8aa;p=linux.git

net: skb: introduce skb_data_area_size()

Helper to calculate the linear data space in the skb.

Signed-off-by: Ricardo Martinez <ricardo.martinez@linux.intel.com>
Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 5c2599e3fe7df..d58669d6cb91a 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1665,6 +1665,11 @@ static inline void skb_set_end_offset(struct sk_buff *skb, unsigned int offset)
 }
 #endif
 
+static inline unsigned int skb_data_area_size(struct sk_buff *skb)
+{
+	return skb_end_pointer(skb) - skb->data;
+}
+
 struct ubuf_info *msg_zerocopy_realloc(struct sock *sk, size_t size,
 				       struct ubuf_info *uarg);