These are just helpers so carry them over, this was added via commit
9e903e0852 through v3.2. The skb frag size was in place for a long time but
was changed from __u16 to __u32 via commit a309bb072b through v2.6.23 and
since we backport for >= 2.6.25 just leave this as is. This was already
only partly backported, this adds the missing helpers.

mcgrof@ergon ~/linux-next (git::master)$ git describe --contains 9e903e0852
v3.2-rc1~182^2~85

mcgrof@ergon ~/linux-next (git::master)$ git describe --contains a309bb072b
v2.6.23-rc2~35^2~11

commit 9e903e085262ffbf1fc44a17ac06058aca03524a
Author: Eric Dumazet <[email protected]>
Date:   Tue Oct 18 21:00:24 2011 +0000

    net: add skb frag size accessors

    To ease skb->truesize sanitization, its better to be able to localize
    all references to skb frags size.

    Define accessors : skb_frag_size() to fetch frag size, and
    skb_frag_size_{set|add|sub}() to manipulate it.

    Signed-off-by: Eric Dumazet <[email protected]>
    Signed-off-by: David S. Miller <[email protected]>

Cc: Eric Dumazet <[email protected]>
Signed-off-by: Luis R. Rodriguez <[email protected]>
---
 backport/backport-include/linux/skbuff.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/backport/backport-include/linux/skbuff.h 
b/backport/backport-include/linux/skbuff.h
index bc67f45..2f7d57b 100644
--- a/backport/backport-include/linux/skbuff.h
+++ b/backport/backport-include/linux/skbuff.h
@@ -313,6 +313,18 @@ static inline int skb_unclone(struct sk_buff *skb, gfp_t 
pri)
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,2,0)
 
+#define skb_frag_size_set LINUX_BACKPORT(skb_frag_size_set)
+static inline void skb_frag_size_set(skb_frag_t *frag, unsigned int size)
+{
+       frag->size = size;
+}
+
+#define skb_frag_size_add LINUX_BACKPORT(skb_frag_size_add)
+static inline void skb_frag_size_add(skb_frag_t *frag, int delta)
+{
+       frag->size += delta;
+}
+
 #define __skb_fill_page_desc LINUX_BACKPORT(__skb_fill_page_desc)
 /**
  * __skb_fill_page_desc - initialise a paged fragment in an skb
-- 
1.8.5.3

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