[PATCH V5 net-next 02/14] net: Rename and export copy_skb_header

[Saeed Mahameed]

From: Ilya Lesokhin <il...@mellanox.com>

copy_skb_header is renamed to skb_copy_header and
exported. Exposing this function give more flexibility
in copying SKBs.
skb_copy and skb_copy_expand do not give enough control
over which parts are copied.

Signed-off-by: Ilya Lesokhin <il...@mellanox.com>
Signed-off-by: Boris Pismenny <bor...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 include/linux/skbuff.h | 1 +
 net/core/skbuff.c      | 9 +++++----
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 47082f54ec1f..096e7fa572d8 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1031,6 +1031,7 @@ static inline struct sk_buff *alloc_skb_fclone(unsigned 
int size,
 struct sk_buff *skb_morph(struct sk_buff *dst, struct sk_buff *src);
 int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask);
 struct sk_buff *skb_clone(struct sk_buff *skb, gfp_t priority);
+void skb_copy_header(struct sk_buff *new, const struct sk_buff *old);
 struct sk_buff *skb_copy(const struct sk_buff *skb, gfp_t priority);
 struct sk_buff *__pskb_copy_fclone(struct sk_buff *skb, int headroom,
                                   gfp_t gfp_mask, bool fclone);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b5c75d4fcf37..e13652b169da 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1304,7 +1304,7 @@ static void skb_headers_offset_update(struct sk_buff 
*skb, int off)
        skb->inner_mac_header += off;
 }
 
-static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
+void skb_copy_header(struct sk_buff *new, const struct sk_buff *old)
 {
        __copy_skb_header(new, old);
 
@@ -1312,6 +1312,7 @@ static void copy_skb_header(struct sk_buff *new, const 
struct sk_buff *old)
        skb_shinfo(new)->gso_segs = skb_shinfo(old)->gso_segs;
        skb_shinfo(new)->gso_type = skb_shinfo(old)->gso_type;
 }
+EXPORT_SYMBOL(skb_copy_header);
 
 static inline int skb_alloc_rx_flag(const struct sk_buff *skb)
 {
@@ -1354,7 +1355,7 @@ struct sk_buff *skb_copy(const struct sk_buff *skb, gfp_t 
gfp_mask)
 
        BUG_ON(skb_copy_bits(skb, -headerlen, n->head, headerlen + skb->len));
 
-       copy_skb_header(n, skb);
+       skb_copy_header(n, skb);
        return n;
 }
 EXPORT_SYMBOL(skb_copy);
@@ -1418,7 +1419,7 @@ struct sk_buff *__pskb_copy_fclone(struct sk_buff *skb, 
int headroom,
                skb_clone_fraglist(n);
        }
 
-       copy_skb_header(n, skb);
+       skb_copy_header(n, skb);
 out:
        return n;
 }
@@ -1598,7 +1599,7 @@ struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
        BUG_ON(skb_copy_bits(skb, -head_copy_len, n->head + head_copy_off,
                             skb->len + head_copy_len));
 
-       copy_skb_header(n, skb);
+       skb_copy_header(n, skb);
 
        skb_headers_offset_update(n, newheadroom - oldheadroom);
 
-- 
2.14.3