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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/aeroflex/greth.c
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@@ -198,7 +198,7 @@ static void greth_clean_rings(struct greth_private *greth)
dma_unmap_page(greth->dev,
greth_read_bd(&tx_bdp->addr),
frag->size,
skb_frag_size(frag),
DMA_TO_DEVICE);
greth->tx_last = NEXT_TX(greth->tx_last);
@@ -517,7 +517,7 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev)
status = GRETH_BD_EN;
if (skb->ip_summed == CHECKSUM_PARTIAL)
status |= GRETH_TXBD_CSALL;
status |= frag->size & GRETH_BD_LEN;
status |= skb_frag_size(frag) & GRETH_BD_LEN;
/* Wrap around descriptor ring */
if (curr_tx == GRETH_TXBD_NUM_MASK)
@@ -531,7 +531,7 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev)
greth_write_bd(&bdp->stat, status);
dma_addr = skb_frag_dma_map(greth->dev, frag, 0, frag->size,
dma_addr = skb_frag_dma_map(greth->dev, frag, 0, skb_frag_size(frag),
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(greth->dev, dma_addr)))
@@ -713,7 +713,7 @@ static void greth_clean_tx_gbit(struct net_device *dev)
dma_unmap_page(greth->dev,
greth_read_bd(&bdp->addr),
frag->size,
skb_frag_size(frag),
DMA_TO_DEVICE);
greth->tx_last = NEXT_TX(greth->tx_last);