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/sun/cassini.c b/drivers/net/ethernet/sun/cassini.c
index d9460d8..fd40988 100644
--- a/drivers/net/ethernet/sun/cassini.c
+++ b/drivers/net/ethernet/sun/cassini.c
@@ -2051,7 +2051,7 @@
__skb_frag_set_page(frag, page->buffer);
__skb_frag_ref(frag);
frag->page_offset = off;
- frag->size = hlen - swivel;
+ skb_frag_size_set(frag, hlen - swivel);
/* any more data? */
if ((words[0] & RX_COMP1_SPLIT_PKT) && ((dlen -= hlen) > 0)) {
@@ -2075,7 +2075,7 @@
__skb_frag_set_page(frag, page->buffer);
__skb_frag_ref(frag);
frag->page_offset = 0;
- frag->size = hlen;
+ skb_frag_size_set(frag, hlen);
RX_USED_ADD(page, hlen + cp->crc_size);
}
@@ -2826,9 +2826,9 @@
entry = TX_DESC_NEXT(ring, entry);
for (frag = 0; frag < nr_frags; frag++) {
- skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
+ const skb_frag_t *fragp = &skb_shinfo(skb)->frags[frag];
- len = fragp->size;
+ len = skb_frag_size(fragp);
mapping = skb_frag_dma_map(&cp->pdev->dev, fragp, 0, len,
DMA_TO_DEVICE);