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net: add skb frag size accessors

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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>
This commit is contained in:
Eric Dumazet
2011-10-18 21:00:24 +00:00
committed by David S. Miller
parent dd767856a3
commit 9e903e0852
87 changed files with 387 additions and 357 deletions
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8
drivers/net/ethernet/sun/cassini.c
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@@ -2051,7 +2051,7 @@ static int cas_rx_process_pkt(struct cas *cp, struct cas_rx_comp *rxc,
__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 @@ static int cas_rx_process_pkt(struct cas *cp, struct cas_rx_comp *rxc,
__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 @@ static inline int cas_xmit_tx_ringN(struct cas *cp, int ring,
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);