mirror of
https://git.openwrt.org/feed/routing.git
synced 2024-06-18 21:23:57 +02:00
09a054faf9
* Request iflink once in batadv-on-batadv check * Request iflink once in batadv_get_real_netdevice * Don't expect inter-netns unique iflink indices * Don't skb_split skbuffs with frag_list Signed-off-by: Sven Eckelmann <sven@narfation.org>
47 lines
1.5 KiB
Diff
47 lines
1.5 KiB
Diff
From: Sven Eckelmann <sven@narfation.org>
|
|
Date: Wed, 2 Mar 2022 19:49:45 +0100
|
|
Subject: batman-adv: Request iflink once in batadv_get_real_netdevice
|
|
|
|
There is no need to call dev_get_iflink multiple times for the same
|
|
net_device in batadv_get_real_netdevice. And since some of the
|
|
ndo_get_iflink callbacks are dynamic (for example via RCUs like in
|
|
vxcan_get_iflink), it could easily happen that the returned values are not
|
|
stable. The pre-checks before __dev_get_by_index are then of course bogus.
|
|
|
|
Fixes: 2b45bb6c3aad ("batman-adv: additional checks for virtual interfaces on top of WiFi")
|
|
Signed-off-by: Sven Eckelmann <sven@narfation.org>
|
|
Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/445f477ec3e805425186f5fbe8ed0fe89cc226b6
|
|
|
|
--- a/net/batman-adv/hard-interface.c
|
|
+++ b/net/batman-adv/hard-interface.c
|
|
@@ -215,14 +215,16 @@ static struct net_device *batadv_get_rea
|
|
struct net_device *real_netdev = NULL;
|
|
struct net *real_net;
|
|
struct net *net;
|
|
- int ifindex;
|
|
+ int iflink;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (!netdev)
|
|
return NULL;
|
|
|
|
- if (netdev->ifindex == dev_get_iflink(netdev)) {
|
|
+ iflink = dev_get_iflink(netdev);
|
|
+
|
|
+ if (netdev->ifindex == iflink) {
|
|
dev_hold(netdev);
|
|
return netdev;
|
|
}
|
|
@@ -232,9 +234,8 @@ static struct net_device *batadv_get_rea
|
|
goto out;
|
|
|
|
net = dev_net(hard_iface->soft_iface);
|
|
- ifindex = dev_get_iflink(netdev);
|
|
real_net = batadv_getlink_net(netdev, net);
|
|
- real_netdev = dev_get_by_index(real_net, ifindex);
|
|
+ real_netdev = dev_get_by_index(real_net, iflink);
|
|
|
|
out:
|
|
if (hard_iface)
|