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, 6 insertions, 6 deletions

diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 1bc908f595de..c3786fda11db 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -599,16 +599,16 @@ static inline void enic_queue_wq_skb_cont(struct enic *enic,
         struct vnic_wq *wq, struct sk_buff *skb,
         unsigned int len_left, int loopback)
 {
-        skb_frag_t *frag;
+        const skb_frag_t *frag;
 
         /* Queue additional data fragments */
         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
-                len_left -= frag->size;
+                len_left -= skb_frag_size(frag);
                 enic_queue_wq_desc_cont(wq, skb,
                         skb_frag_dma_map(&enic->pdev->dev,
-                                         frag, 0, frag->size,
+                                         frag, 0, skb_frag_size(frag),
                                          DMA_TO_DEVICE),
-                        frag->size,
+                        skb_frag_size(frag),
                         (len_left == 0),        /* EOP? */
                         loopback);
         }
@@ -717,8 +717,8 @@ static inline void enic_queue_wq_skb_tso(struct enic *enic,
          * for additional data fragments
          */
         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
-                len_left -= frag->size;
-                frag_len_left = frag->size;
+                len_left -= skb_frag_size(frag);
+                frag_len_left = skb_frag_size(frag);
                 offset = 0;
 
                 while (frag_len_left) {