Hello,
On Tue, 23 Jun 2015, Andy Gospodarek wrote:
> Add a fib flag called RTNH_F_LINKDOWN to any ipv4 nexthops that are
> reachable via an interface where carrier is off. No action is taken,
> but additional flags are passed to userspace to indicate carrier status.
>
> This also includes a cleanup to fib_disable_ip to more clearly indicate
> what event made the function call to replace the more cryptic force
> option previously used.
>
> diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
> index 872494e..534eb14 100644
> --- a/net/ipv4/fib_frontend.c
> +++ b/net/ipv4/fib_frontend.c
> @@ -1093,7 +1093,7 @@ static int fib_inetaddr_event(struct notifier_block
> *this, unsigned long event,
> /* Last address was deleted from this interface.
> * Disable IP.
> */
> - fib_disable_ip(dev, 1);
> + fib_disable_ip(dev, event);
NETDEV_DOWN for "inetaddr" event is used instead of force=1 ...
> case NETDEV_DOWN:
> - fib_disable_ip(dev, 0);
> + fib_disable_ip(dev, event);
Ops, NETDEV_DOWN for different "netdev" event is
used this time for force=0 ...
> diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
> index 28ec3c1..b1b305b 100644
> --- a/net/ipv4/fib_semantics.c
> +++ b/net/ipv4/fib_semantics.c
> @@ -1112,7 +1124,8 @@ int fib_sync_down_dev(struct net_device *dev, int force)
> struct hlist_head *head = &fib_info_devhash[hash];
> struct fib_nh *nh;
>
> - if (force)
> + if (event == NETDEV_UNREGISTER ||
> + event == NETDEV_DOWN)
Wrong, both kinds of NETDEV_DOWN events set scope = -1.
May be this leads to removal of RT_SCOPE_NOWHERE NHs when
"netdev" event NETDEV_DOWN comes. May be we still need a
flag to know if the NETDEV_DOWN event was for force=1 and
to check it again above? Or may be to use "force" flag again?
> scope = -1;
Regards
--
Julian Anastasov <j...@ssi.bg>
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