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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/virtio_net.c
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@@ -147,14 +147,14 @@ static void set_skb_frag(struct sk_buff *skb, struct page *page,
skb_frag_t *f;
f = &skb_shinfo(skb)->frags[i];
f->size = min((unsigned)PAGE_SIZE - offset, *len);
skb_frag_size_set(f, min((unsigned)PAGE_SIZE - offset, *len));
f->page_offset = offset;
__skb_frag_set_page(f, page);
skb->data_len += f->size;
skb->len += f->size;
skb->data_len += skb_frag_size(f);
skb->len += skb_frag_size(f);
skb_shinfo(skb)->nr_frags++;
*len -= f->size;
*len -= skb_frag_size(f);
}
static struct sk_buff *page_to_skb(struct virtnet_info *vi,