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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2011-11-18 03:20:04 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-18 20:37:09 +0100 |
| commit | ae641949df01b85117845bec45328eab6d6fada1 (patch) | |
| tree | ed8d5aedd678f86e8554dc0b1c080a43ef4b331d /net/ieee802154 | |
| parent | ipv6: Remove all uses of LL_ALLOCATED_SPACE (diff) | |
| download | linux-ae641949df01b85117845bec45328eab6d6fada1.tar.xz linux-ae641949df01b85117845bec45328eab6d6fada1.zip | |
net: Remove all uses of LL_ALLOCATED_SPACE
net: 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 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/ieee802154')
| -rw-r--r-- | net/ieee802154/dgram.c | 7 | ||||
| -rw-r--r-- | net/ieee802154/raw.c | 7 |
2 files changed, 10 insertions, 4 deletions
diff --git a/net/ieee802154/dgram.c b/net/ieee802154/dgram.c index faecf648123f..1b09eaabaac1 100644 --- a/net/ieee802154/dgram.c +++ b/net/ieee802154/dgram.c @@ -209,6 +209,7 @@ static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk, unsigned mtu; struct sk_buff *skb; struct dgram_sock *ro = dgram_sk(sk); + int hlen, tlen; int err; if (msg->msg_flags & MSG_OOB) { @@ -229,13 +230,15 @@ static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk, mtu = dev->mtu; pr_debug("name = %s, mtu = %u\n", dev->name, mtu); - skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size, + hlen = LL_RESERVED_SPACE(dev); + tlen = dev->needed_tailroom; + skb = sock_alloc_send_skb(sk, hlen + tlen + size, msg->msg_flags & MSG_DONTWAIT, &err); if (!skb) goto out_dev; - skb_reserve(skb, LL_RESERVED_SPACE(dev)); + skb_reserve(skb, hlen); skb_reset_network_header(skb); diff --git a/net/ieee802154/raw.c b/net/ieee802154/raw.c index 10970ca85748..f96bae8fd330 100644 --- a/net/ieee802154/raw.c +++ b/net/ieee802154/raw.c @@ -108,6 +108,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, struct net_device *dev; unsigned mtu; struct sk_buff *skb; + int hlen, tlen; int err; if (msg->msg_flags & MSG_OOB) { @@ -137,12 +138,14 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, goto out_dev; } - skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size, + hlen = LL_RESERVED_SPACE(dev); + tlen = dev->needed_tailroom; + skb = sock_alloc_send_skb(sk, hlen + tlen + size, msg->msg_flags & MSG_DONTWAIT, &err); if (!skb) goto out_dev; - skb_reserve(skb, LL_RESERVED_SPACE(dev)); + skb_reserve(skb, hlen); skb_reset_mac_header(skb); skb_reset_network_header(skb); |