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| author | Eyal Birger <eyal.birger@gmail.com> | 2020-07-09 13:16:51 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2020-07-13 11:12:47 +0200 |
| commit | 2749c69734298905aedb0629f2bc66346f0031f9 (patch) | |
| tree | 94bf212b4fb19b02067f42bb7698626621fd32e8 /net/xfrm | |
| parent | 2d4c7986dbc6f78043df7b946b36996fca8c046f (diff) | |
| download | lwn-2749c69734298905aedb0629f2bc66346f0031f9.tar.gz lwn-2749c69734298905aedb0629f2bc66346f0031f9.zip | |
xfrm interface: avoid xi lookup in xfrmi_decode_session()
The xfrmi context exists in the netdevice priv context.
Avoid looking for it in a separate list.
Signed-off-by: Eyal Birger <eyal.birger@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm')
| -rw-r--r-- | net/xfrm/xfrm_interface.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c index a79eb49a4e0d..36a765eac034 100644 --- a/net/xfrm/xfrm_interface.c +++ b/net/xfrm/xfrm_interface.c @@ -47,6 +47,7 @@ static int xfrmi_dev_init(struct net_device *dev); static void xfrmi_dev_setup(struct net_device *dev); static struct rtnl_link_ops xfrmi_link_ops __read_mostly; static unsigned int xfrmi_net_id __read_mostly; +static const struct net_device_ops xfrmi_netdev_ops; struct xfrmi_net { /* lists for storing interfaces in use */ @@ -73,8 +74,7 @@ static struct xfrm_if *xfrmi_lookup(struct net *net, struct xfrm_state *x) static struct xfrm_if *xfrmi_decode_session(struct sk_buff *skb, unsigned short family) { - struct xfrmi_net *xfrmn; - struct xfrm_if *xi; + struct net_device *dev; int ifindex = 0; if (!secpath_exists(skb) || !skb->dev) @@ -88,18 +88,21 @@ static struct xfrm_if *xfrmi_decode_session(struct sk_buff *skb, ifindex = inet_sdif(skb); break; } - if (!ifindex) - ifindex = skb->dev->ifindex; - xfrmn = net_generic(xs_net(xfrm_input_state(skb)), xfrmi_net_id); + if (ifindex) { + struct net *net = xs_net(xfrm_input_state(skb)); - for_each_xfrmi_rcu(xfrmn->xfrmi[0], xi) { - if (ifindex == xi->dev->ifindex && - (xi->dev->flags & IFF_UP)) - return xi; + dev = dev_get_by_index_rcu(net, ifindex); + } else { + dev = skb->dev; } - return NULL; + if (!dev || !(dev->flags & IFF_UP)) + return NULL; + if (dev->netdev_ops != &xfrmi_netdev_ops) + return NULL; + + return netdev_priv(dev); } static void xfrmi_link(struct xfrmi_net *xfrmn, struct xfrm_if *xi) |