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[SK_BUFF]: Introduce skb_copy_from_linear_data{_offset}

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To clearly state the intent of copying from linear sk_buffs, _offset being a
overly long variant but interesting for the sake of saving some bytes.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2007-03-27 18:55:52 -03:00
committed by David S. Miller
parent 2a123b86e2
commit d626f62b11
133 changed files with 321 additions and 230 deletions
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17
net/core/skbuff.c
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@@ -576,7 +576,7 @@ struct sk_buff *pskb_copy(struct sk_buff *skb, gfp_t gfp_mask)
/* Set the tail pointer and length */
skb_put(n, skb_headlen(skb));
/* Copy the bytes */
memcpy(n->data, skb->data, n->len);
skb_copy_from_linear_data(skb, n->data, n->len);
n->csum = skb->csum;
n->ip_summed = skb->ip_summed;
@@ -1043,7 +1043,7 @@ int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)
if ((copy = start - offset) > 0) {
if (copy > len)
copy = len;
memcpy(to, skb->data + offset, copy);
skb_copy_from_linear_data_offset(skb, offset, to, copy);
if ((len -= copy) == 0)
return 0;
offset += copy;
@@ -1362,7 +1362,7 @@ void skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to)
BUG_ON(csstart > skb_headlen(skb));
memcpy(to, skb->data, csstart);
skb_copy_from_linear_data(skb, to, csstart);
csum = 0;
if (csstart != skb->len)
@@ -1536,8 +1536,8 @@ static inline void skb_split_inside_header(struct sk_buff *skb,
{
int i;
memcpy(skb_put(skb1, pos - len), skb->data + len, pos - len);
skb_copy_from_linear_data_offset(skb, len, skb_put(skb1, pos - len),
pos - len);
/* And move data appendix as is. */
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
skb_shinfo(skb1)->frags[i] = skb_shinfo(skb)->frags[i];
@@ -1927,8 +1927,8 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int features)
skb_set_network_header(nskb, skb->mac_len);
nskb->transport_header = (nskb->network_header +
skb_network_header_len(skb));
memcpy(skb_put(nskb, doffset), skb->data, doffset);
skb_copy_from_linear_data(skb, skb_put(nskb, doffset),
doffset);
if (!sg) {
nskb->csum = skb_copy_and_csum_bits(skb, offset,
skb_put(nskb, len),
@@ -1941,7 +1941,8 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int features)
nskb->ip_summed = CHECKSUM_PARTIAL;
nskb->csum = skb->csum;
memcpy(skb_put(nskb, hsize), skb->data + offset, hsize);
skb_copy_from_linear_data_offset(skb, offset,
skb_put(nskb, hsize), hsize);
while (pos < offset + len) {
BUG_ON(i >= nfrags);