diff options
| author | Thomas Graf <tgraf@suug.ch> | 2006-11-10 14:10:15 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-12-02 21:22:11 -0800 |
| commit | 339bf98ffc6a8d8eb16fc532ac57ffbced2f8a68 (patch) | |
| tree | 499ad948863d2753ca10283dcf006ad28954538e /net/netlink/af_netlink.c | |
| parent | a94f723d595ee085f81b1788d18e031af7eeba91 (diff) | |
| download | lwn-339bf98ffc6a8d8eb16fc532ac57ffbced2f8a68.tar.gz lwn-339bf98ffc6a8d8eb16fc532ac57ffbced2f8a68.zip | |
[NETLINK]: Do precise netlink message allocations where possible
Account for the netlink message header size directly in nlmsg_new()
instead of relying on the caller calculate it correctly.
Replaces error handling of message construction functions when
constructing notifications with bug traps since a failure implies
a bug in calculating the size of the skb.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink/af_netlink.c')
| -rw-r--r-- | net/netlink/af_netlink.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index d527c8977b1f..f61d81b3c61c 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1148,7 +1148,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock, if (len > sk->sk_sndbuf - 32) goto out; err = -ENOBUFS; - skb = nlmsg_new(len, GFP_KERNEL); + skb = alloc_skb(len, GFP_KERNEL); if (skb==NULL) goto out; @@ -1435,14 +1435,13 @@ void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err) struct sk_buff *skb; struct nlmsghdr *rep; struct nlmsgerr *errmsg; - int size; + size_t payload = sizeof(*errmsg); - if (err == 0) - size = nlmsg_total_size(sizeof(*errmsg)); - else - size = nlmsg_total_size(sizeof(*errmsg) + nlmsg_len(nlh)); + /* error messages get the original request appened */ + if (err) + payload += nlmsg_len(nlh); - skb = nlmsg_new(size, GFP_KERNEL); + skb = nlmsg_new(payload, GFP_KERNEL); if (!skb) { struct sock *sk; |