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 <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/ethernet/intel/igbvf/netdev.c b/drivers/net/ethernet/intel/igbvf/netdev.c
index 23cc40f22d6f..1bd9abddcc59 100644
--- a/drivers/net/ethernet/intel/igbvf/netdev.c
+++ b/drivers/net/ethernet/intel/igbvf/netdev.c
@@ -2045,7 +2045,7 @@ static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
 
 
         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
-                struct skb_frag_struct *frag;
+                const struct skb_frag_struct *frag;
 
                 count++;
                 i++;
@@ -2053,7 +2053,7 @@ static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
                         i = 0;
 
                 frag = &skb_shinfo(skb)->frags[f];
-                len = frag->size;
+                len = skb_frag_size(frag);
 
                 buffer_info = &tx_ring->buffer_info[i];
                 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);