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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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4
drivers/net/xen-netback/netback.c
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@@ -334,7 +334,7 @@ unsigned int xen_netbk_count_skb_slots(struct xenvif *vif, struct sk_buff *skb)
count++;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
unsigned long size = skb_shinfo(skb)->frags[i].size;
unsigned long size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
unsigned long bytes;
while (size > 0) {
BUG_ON(copy_off > MAX_BUFFER_OFFSET);
@@ -526,7 +526,7 @@ static int netbk_gop_skb(struct sk_buff *skb,
for (i = 0; i < nr_frags; i++) {
netbk_gop_frag_copy(vif, skb, npo,
skb_frag_page(&skb_shinfo(skb)->frags[i]),
skb_shinfo(skb)->frags[i].size,
skb_frag_size(&skb_shinfo(skb)->frags[i]),
skb_shinfo(skb)->frags[i].page_offset,
&head);
}