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/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c
index bdd3e6a330cd..c27fb3dda9f4 100644
--- a/drivers/net/ethernet/neterion/s2io.c
+++ b/drivers/net/ethernet/neterion/s2io.c
@@ -2350,12 +2350,12 @@ static struct sk_buff *s2io_txdl_getskb(struct fifo_info *fifo_data,
         if (frg_cnt) {
                 txds++;
                 for (j = 0; j < frg_cnt; j++, txds++) {
-                        skb_frag_t *frag = &skb_shinfo(skb)->frags[j];
+                        const skb_frag_t *frag = &skb_shinfo(skb)->frags[j];
                         if (!txds->Buffer_Pointer)
                                 break;
                         pci_unmap_page(nic->pdev,
                                        (dma_addr_t)txds->Buffer_Pointer,
-                                       frag->size, PCI_DMA_TODEVICE);
+                                       skb_frag_size(frag), PCI_DMA_TODEVICE);
                 }
         }
         memset(txdlp, 0, (sizeof(struct TxD) * fifo_data->max_txds));
@@ -4185,16 +4185,16 @@ static netdev_tx_t s2io_xmit(struct sk_buff *skb, struct net_device *dev)
         frg_cnt = skb_shinfo(skb)->nr_frags;
         /* For fragmented SKB. */
         for (i = 0; i < frg_cnt; i++) {
-                skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+                const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
                 /* A '0' length fragment will be ignored */
-                if (!frag->size)
+                if (!skb_frag_size(frag))
                         continue;
                 txdp++;
                 txdp->Buffer_Pointer = (u64)skb_frag_dma_map(&sp->pdev->dev,
                                                              frag, 0,
-                                                             frag->size,
+                                                             skb_frag_size(frag),
                                                              DMA_TO_DEVICE);
-                txdp->Control_1 = TXD_BUFFER0_SIZE(frag->size);
+                txdp->Control_1 = TXD_BUFFER0_SIZE(skb_frag_size(frag));
                 if (offload_type == SKB_GSO_UDP)
                         txdp->Control_1 |= TXD_UFO_EN;
         }