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/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index fe712f9..b89027c 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -5356,7 +5356,7 @@
pci_unmap_page(tp->pdev,
dma_unmap_addr(ri, mapping),
- skb_shinfo(skb)->frags[i].size,
+ skb_frag_size(&skb_shinfo(skb)->frags[i]),
PCI_DMA_TODEVICE);
while (ri->fragmented) {
@@ -6510,14 +6510,14 @@
}
for (i = 0; i < last; i++) {
- skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
entry = NEXT_TX(entry);
txb = &tnapi->tx_buffers[entry];
pci_unmap_page(tnapi->tp->pdev,
dma_unmap_addr(txb, mapping),
- frag->size, PCI_DMA_TODEVICE);
+ skb_frag_size(frag), PCI_DMA_TODEVICE);
while (txb->fragmented) {
txb->fragmented = false;
@@ -6777,7 +6777,7 @@
for (i = 0; i <= last; i++) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
- len = frag->size;
+ len = skb_frag_size(frag);
mapping = skb_frag_dma_map(&tp->pdev->dev, frag, 0,
len, DMA_TO_DEVICE);