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| author |   Herbert Xu <herbert@gondor.apana.org.au> | 2011-11-18 02:20:04 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-11-18 14:37:09 -0500 |
| commit | a7ae1992248e5cf9dc5bd35695ab846d27efe15f (patch) | |
| tree | ed3f450a41ca5975aecae2850105ca22f98ca318 /net/ipv6/raw.c | |
| parent | ipv4: Remove all uses of LL_ALLOCATED_SPACE (diff) | |
| download | linux-dev-a7ae1992248e5cf9dc5bd35695ab846d27efe15f.tar.xz linux-dev-a7ae1992248e5cf9dc5bd35695ab846d27efe15f.zip | |
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.c | 6 |
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; |