diff options
| author | Martin Schiller <ms@dev.tdt.de> | 2020-11-26 07:35:53 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-27 17:22:51 -0800 |
| commit | 7eed751b3b2a6949932a6a59fa2792c584641618 (patch) | |
| tree | f0ea97a4eaa78cd2d06210b8aff8239b795a0791 /net/x25 | |
| parent | f5d709ffde6b826133ccf9e8a104ce00fe31dbfb (diff) | |
| download | linux-7eed751b3b2a6949932a6a59fa2792c584641618.tar.bz2 | |
net/x25: handle additional netdev events
1. Add / remove x25_link_device by NETDEV_REGISTER/UNREGISTER and also
by NETDEV_POST_TYPE_CHANGE/NETDEV_PRE_TYPE_CHANGE.
This change is needed so that the x25_neigh struct for an interface
is already created when it shows up and is kept independently if the
interface goes UP or DOWN.
This is used in an upcomming commit, where x25 params of an neighbour
will get configurable through ioctls.
2. NETDEV_CHANGE event makes it possible to handle carrier loss and
detection. If carrier is lost, clean up everything related to this
neighbour by calling x25_link_terminated().
3. Also call x25_link_terminated() for NETDEV_DOWN events and remove the
call to x25_clear_forward_by_dev() in x25_route_device_down(), as
this is already called by x25_kill_by_neigh() which gets called by
x25_link_terminated().
4. Do nothing for NETDEV_UP and NETDEV_GOING_DOWN events, as these will
be handled in layer 2 (LAPB) and layer3 (X.25) will be informed by
layer2 when layer2 link is established and layer3 link should be
initiated.
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/x25')
| -rw-r--r-- | net/x25/af_x25.c | 22 | ||||
| -rw-r--r-- | net/x25/x25_link.c | 6 | ||||
| -rw-r--r-- | net/x25/x25_route.c | 3 |
3 files changed, 19 insertions, 12 deletions
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index a10487e7574c..210829dbda62 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -233,21 +233,31 @@ static int x25_device_event(struct notifier_block *this, unsigned long event, #endif ) { switch (event) { - case NETDEV_UP: + case NETDEV_REGISTER: + case NETDEV_POST_TYPE_CHANGE: x25_link_device_up(dev); break; - case NETDEV_GOING_DOWN: + case NETDEV_DOWN: nb = x25_get_neigh(dev); if (nb) { - x25_terminate_link(nb); + x25_link_terminated(nb); x25_neigh_put(nb); } - break; - case NETDEV_DOWN: - x25_kill_by_device(dev); x25_route_device_down(dev); + break; + case NETDEV_PRE_TYPE_CHANGE: + case NETDEV_UNREGISTER: x25_link_device_down(dev); break; + case NETDEV_CHANGE: + if (!netif_carrier_ok(dev)) { + nb = x25_get_neigh(dev); + if (nb) { + x25_link_terminated(nb); + x25_neigh_put(nb); + } + } + break; } } diff --git a/net/x25/x25_link.c b/net/x25/x25_link.c index fdae054b7dc1..11e868aa625d 100644 --- a/net/x25/x25_link.c +++ b/net/x25/x25_link.c @@ -232,6 +232,9 @@ void x25_link_established(struct x25_neigh *nb) void x25_link_terminated(struct x25_neigh *nb) { nb->state = X25_LINK_STATE_0; + skb_queue_purge(&nb->queue); + x25_stop_t20timer(nb); + /* Out of order: clear existing virtual calls (X.25 03/93 4.6.3) */ x25_kill_by_neigh(nb); } @@ -277,9 +280,6 @@ void x25_link_device_up(struct net_device *dev) */ static void __x25_remove_neigh(struct x25_neigh *nb) { - skb_queue_purge(&nb->queue); - x25_stop_t20timer(nb); - if (nb->node.next) { list_del(&nb->node); x25_neigh_put(nb); diff --git a/net/x25/x25_route.c b/net/x25/x25_route.c index 00e46c9a5280..ec2a39e9b3e6 100644 --- a/net/x25/x25_route.c +++ b/net/x25/x25_route.c @@ -115,9 +115,6 @@ void x25_route_device_down(struct net_device *dev) __x25_remove_route(rt); } write_unlock_bh(&x25_route_list_lock); - - /* Remove any related forwarding */ - x25_clear_forward_by_dev(dev); } /* |