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[SK_BUFF]: Introduce skb_copy_from_linear_data{_offset}

Browse source 
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 <[email protected]>
This commit is contained in:
Arnaldo Carvalho de Melo 2007-03-27 18:55:52 -03:00 • committed by David S. Miller
commit d626f62b11
133 changed files with 321 additions and 230 deletions
Download patch file Download diff file Expand all files Collapse all files

2
net/ieee80211/ieee80211_crypt_wep.c
View file

@ -152,7 +152,7 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
return -1;
/* Copy the IV into the first 3 bytes of the key */
memcpy(key, skb->data + hdr_len, 3);
skb_copy_from_linear_data_offset(skb, hdr_len, key, 3);
/* Copy rest of the WEP key (the secret part) */
memcpy(key + 3, wep->key, wep->key_len);

6
net/ieee80211/ieee80211_rx.c
View file

@ -606,12 +606,12 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
if (frag == 0) {
/* copy first fragment (including full headers) into
* beginning of the fragment cache skb */
memcpy(skb_put(frag_skb, flen), skb->data, flen);
skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
} else {
/* append frame payload to the end of the fragment
* cache skb */
memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
flen);
skb_copy_from_linear_data_offset(skb, hdrlen,
skb_put(frag_skb, flen), flen);
}
dev_kfree_skb_any(skb);
skb = NULL;

8
net/ieee80211/ieee80211_tx.c
View file

@ -309,8 +309,8 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
}
/* Save source and destination addresses */
memcpy(dest, skb->data, ETH_ALEN);
memcpy(src, skb->data + ETH_ALEN, ETH_ALEN);
skb_copy_from_linear_data(skb, dest, ETH_ALEN);
skb_copy_from_linear_data_offset(skb, ETH_ALEN, src, ETH_ALEN);
if (host_encrypt || host_build_iv)
fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA |
@ -363,7 +363,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
snapped = 1;
ieee80211_copy_snap(skb_put(skb_new, SNAP_SIZE + sizeof(u16)),
ether_type);
memcpy(skb_put(skb_new, skb->len), skb->data, skb->len);
skb_copy_from_linear_data(skb, skb_put(skb_new, skb->len), skb->len);
res = crypt->ops->encrypt_msdu(skb_new, hdr_len, crypt->priv);
if (res < 0) {
IEEE80211_ERROR("msdu encryption failed\n");
@ -492,7 +492,7 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
bytes -= SNAP_SIZE + sizeof(u16);
}
memcpy(skb_put(skb_frag, bytes), skb->data, bytes);
skb_copy_from_linear_data(skb, skb_put(skb_frag, bytes), bytes);
/* Advance the SKB... */
skb_pull(skb, bytes);