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/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index 902f284fd054..b771ebac0f01 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -656,8 +656,8 @@ vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
 
         __skb_frag_set_page(frag, rbi->page);
         frag->page_offset = 0;
-        frag->size = rcd->len;
-        skb->data_len += frag->size;
+        skb_frag_size_set(frag, rcd->len);
+        skb->data_len += rcd->len;
         skb->truesize += PAGE_SIZE;
         skb_shinfo(skb)->nr_frags++;
 }
@@ -745,21 +745,21 @@ vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
         }
 
         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
-                struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
+                const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
 
                 tbi = tq->buf_info + tq->tx_ring.next2fill;
                 tbi->map_type = VMXNET3_MAP_PAGE;
                 tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
-                                                 0, frag->size,
+                                                 0, skb_frag_size(frag),
                                                  DMA_TO_DEVICE);
 
-                tbi->len = frag->size;
+                tbi->len = skb_frag_size(frag);
 
                 gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
                 BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
 
                 gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
-                gdesc->dword[2] = cpu_to_le32(dw2 | frag->size);
+                gdesc->dword[2] = cpu_to_le32(dw2 | skb_frag_size(frag));
                 gdesc->dword[3] = 0;
 
                 dev_dbg(&adapter->netdev->dev,