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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
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/ulp/ipoib/ipoib_cm.c
View File

@ -543,7 +543,7 @@ static void skb_put_frags(struct sk_buff *skb, unsigned int hdr_space,
} else {
size = min(length, (unsigned) PAGE_SIZE);
frag->size = size;
skb_frag_size_set(frag, size);
skb->data_len += size;
skb->truesize += size;
skb->len += size;

18
drivers/infiniband/ulp/ipoib/ipoib_ib.c
View File

@ -117,7 +117,7 @@ static void ipoib_ud_skb_put_frags(struct ipoib_dev_priv *priv,
size = length - IPOIB_UD_HEAD_SIZE;
frag->size = size;
skb_frag_size_set(frag, size);
skb->data_len += size;
skb->truesize += size;
} else
@ -322,10 +322,10 @@ static int ipoib_dma_map_tx(struct ib_device *ca,
off = 0;
for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
mapping[i + off] = ib_dma_map_page(ca,
skb_frag_page(frag),
frag->page_offset, frag->size,
frag->page_offset, skb_frag_size(frag),
DMA_TO_DEVICE);
if (unlikely(ib_dma_mapping_error(ca, mapping[i + off])))
goto partial_error;
@ -334,8 +334,9 @@ static int ipoib_dma_map_tx(struct ib_device *ca,
partial_error:
for (; i > 0; --i) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
ib_dma_unmap_page(ca, mapping[i - !off], frag->size, DMA_TO_DEVICE);
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
ib_dma_unmap_page(ca, mapping[i - !off], skb_frag_size(frag), DMA_TO_DEVICE);
}
if (off)
@ -359,8 +360,9 @@ static void ipoib_dma_unmap_tx(struct ib_device *ca,
off = 0;
for (i = 0; i < skb_shinfo(skb)->nr_frags; ++i) {
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
ib_dma_unmap_page(ca, mapping[i + off], frag->size,
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
ib_dma_unmap_page(ca, mapping[i + off], skb_frag_size(frag),
DMA_TO_DEVICE);
}
}
@ -510,7 +512,7 @@ static inline int post_send(struct ipoib_dev_priv *priv,
for (i = 0; i < nr_frags; ++i) {
priv->tx_sge[i + off].addr = mapping[i + off];
priv->tx_sge[i + off].length = frags[i].size;
priv->tx_sge[i + off].length = skb_frag_size(&frags[i]);
}
priv->tx_wr.num_sge = nr_frags + off;
priv->tx_wr.wr_id = wr_id;