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authorDavid S. Miller <davem@davemloft.net>2008-06-18 01:19:51 -0700
committerDavid S. Miller <davem@davemloft.net>2008-06-18 01:19:51 -0700
commit3a5be7d4b079f3a9ce1e8ce4a93ba15ae6d00111 (patch)
treec9480b8cca612e9355f6035f2e2814482a07d4b2 /net
parent3c73419c09a5ef73d56472dbfdade9e311496e9b (diff)
downloadlinux-3a5be7d4b079f3a9ce1e8ce4a93ba15ae6d00111.tar.bz2
Revert "mac80211: Use skb_header_cloned() on TX path."
This reverts commit 608961a5eca8d3c6bd07172febc27b5559408c5d. The problem is that the mac80211 stack not only needs to be able to muck with the link-level headers, it also might need to mangle all of the packet data if doing sw wireless encryption. This fixes kernel bugzilla #10903. Thanks to Didier Raboud (for the bugzilla report), Andrew Prince (for bisecting), Johannes Berg (for bringing this bisection analysis to my attention), and Ilpo (for trying to analyze this purely from the TCP side). In 2.6.27 we can take another stab at this, by using something like skb_cow_data() when the TX path of mac80211 ends up with a non-NULL tx->key. The ESP protocol code in the IPSEC stack can be used as a model for implementation. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/tx.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 1d7dd54aacef..28d8bd53bd3a 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1562,13 +1562,13 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb,
* be cloned. This could happen, e.g., with Linux bridge code passing
* us broadcast frames. */
- if (head_need > 0 || skb_header_cloned(skb)) {
+ if (head_need > 0 || skb_cloned(skb)) {
#if 0
printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes "
"of headroom\n", dev->name, head_need);
#endif
- if (skb_header_cloned(skb))
+ if (skb_cloned(skb))
I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
else
I802_DEBUG_INC(local->tx_expand_skb_head);