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, 5 insertions, 5 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb/sge.c b/drivers/net/ethernet/chelsio/cxgb/sge.c
index 0a511c4a0472..f9b602300040 100644
--- a/drivers/net/ethernet/chelsio/cxgb/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb/sge.c
@@ -1135,8 +1135,8 @@ static inline unsigned int compute_large_page_tx_descs(struct sk_buff *skb)
                         len -= SGE_TX_DESC_MAX_PLEN;
                 }
                 for (i = 0; nfrags--; i++) {
-                        skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
-                        len = frag->size;
+                        const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+                        len = skb_frag_size(frag);
                         while (len > SGE_TX_DESC_MAX_PLEN) {
                                 count++;
                                 len -= SGE_TX_DESC_MAX_PLEN;
@@ -1278,9 +1278,9 @@ static inline void write_tx_descs(struct adapter *adapter, struct sk_buff *skb,
                 }
 
                 mapping = skb_frag_dma_map(&adapter->pdev->dev, frag, 0,
-                                           frag->size, DMA_TO_DEVICE);
+                                           skb_frag_size(frag), DMA_TO_DEVICE);
                 desc_mapping = mapping;
-                desc_len = frag->size;
+                desc_len = skb_frag_size(frag);
 
                 pidx = write_large_page_tx_descs(pidx, &e1, &ce, &gen,
                                                  &desc_mapping, &desc_len,
@@ -1290,7 +1290,7 @@ static inline void write_tx_descs(struct adapter *adapter, struct sk_buff *skb,
                                       nfrags == 0);
                 ce->skb = NULL;
                 dma_unmap_addr_set(ce, dma_addr, mapping);
-                dma_unmap_len_set(ce, dma_len, frag->size);
+                dma_unmap_len_set(ce, dma_len, skb_frag_size(frag));
         }
         ce->skb = skb;
         wmb();