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authorHerbert Xu <herbert@gondor.apana.org.au>2011-11-18 06:20:04 +0400
committerDavid S. Miller <davem@davemloft.net>2011-11-18 23:37:09 +0400
commita7ae1992248e5cf9dc5bd35695ab846d27efe15f (patch)
treeed3f450a41ca5975aecae2850105ca22f98ca318 /net/ipv6/raw.c
parent660882432909dbe611f1792eda158188065cb9f1 (diff)
downloadlinux-a7ae1992248e5cf9dc5bd35695ab846d27efe15f.tar.xz
ipv6: Remove all uses of LL_ALLOCATED_SPACE
ipv6: Remove all uses of LL_ALLOCATED_SPACE The macro LL_ALLOCATED_SPACE was ill-conceived. It applies the alignment to the sum of needed_headroom and needed_tailroom. As the amount that is then reserved for head room is needed_headroom with alignment, this means that the tail room left may be too small. This patch replaces all uses of LL_ALLOCATED_SPACE in net/ipv6 with the macro LL_RESERVED_SPACE and direct reference to needed_tailroom. This also fixes the problem with needed_headroom changing between allocating the skb and reserving the head room. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/raw.c')
-rw-r--r--net/ipv6/raw.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 204f2e833f04..a1aa869a9ce7 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -611,6 +611,8 @@ static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
struct sk_buff *skb;
int err;
struct rt6_info *rt = (struct rt6_info *)*dstp;
+ int hlen = LL_RESERVED_SPACE(rt->dst.dev);
+ int tlen = rt->dst.dev->needed_tailroom;
if (length > rt->dst.dev->mtu) {
ipv6_local_error(sk, EMSGSIZE, fl6, rt->dst.dev->mtu);
@@ -620,11 +622,11 @@ static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
goto out;
skb = sock_alloc_send_skb(sk,
- length + LL_ALLOCATED_SPACE(rt->dst.dev) + 15,
+ length + hlen + tlen + 15,
flags & MSG_DONTWAIT, &err);
if (skb == NULL)
goto error;
- skb_reserve(skb, LL_RESERVED_SPACE(rt->dst.dev));
+ skb_reserve(skb, hlen);
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;