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>
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 2ce6070..aa39e77 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -5413,7 +5413,7 @@
entry = tp->cur_tx;
for (cur_frag = 0; cur_frag < info->nr_frags; cur_frag++) {
- skb_frag_t *frag = info->frags + cur_frag;
+ const skb_frag_t *frag = info->frags + cur_frag;
dma_addr_t mapping;
u32 status, len;
void *addr;
@@ -5421,7 +5421,7 @@
entry = (entry + 1) % NUM_TX_DESC;
txd = tp->TxDescArray + entry;
- len = frag->size;
+ len = skb_frag_size(frag);
addr = skb_frag_address(frag);
mapping = dma_map_single(d, addr, len, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(d, mapping))) {