| Message ID | 20201116135522.21791-5-ms@dev.tdt.de |
|---|---|
| State | Superseded |
| Headers | show |
| Series | netdev event handling + neighbour config | expand |
On Mon, Nov 16, 2020 at 6:00 AM Martin Schiller <ms@dev.tdt.de> wrote: > > This makes it possible to handle carrier lost and detection. > In case of carrier lost, we shutdown layer 3 and flush all sessions. > > @@ -275,6 +275,19 @@ static int x25_device_event(struct notifier_block *this, unsigned long event, > dev->name); > x25_link_device_remove(dev); > break; > + case NETDEV_CHANGE: > + pr_debug("X.25: got event NETDEV_CHANGE for device: %s\n", > + dev->name); > + if (!netif_carrier_ok(dev)) { > + pr_debug("X.25: Carrier lost -> set link state down: %s\n", > + dev->name); > + nb = x25_get_neigh(dev); > + if (nb) { > + x25_link_terminated(nb); > + x25_neigh_put(nb); > + } > + } > + break; > } > } I think L2 will notify L3 if the L2 connection is terminated. Is this patch necessary?
On 2020-11-17 12:41, Xie He wrote: > On Mon, Nov 16, 2020 at 6:00 AM Martin Schiller <ms@dev.tdt.de> wrote: >> >> This makes it possible to handle carrier lost and detection. >> In case of carrier lost, we shutdown layer 3 and flush all sessions. >> >> @@ -275,6 +275,19 @@ static int x25_device_event(struct notifier_block >> *this, unsigned long event, >> dev->name); >> x25_link_device_remove(dev); >> break; >> + case NETDEV_CHANGE: >> + pr_debug("X.25: got event NETDEV_CHANGE for >> device: %s\n", >> + dev->name); >> + if (!netif_carrier_ok(dev)) { >> + pr_debug("X.25: Carrier lost -> set >> link state down: %s\n", >> + dev->name); >> + nb = x25_get_neigh(dev); >> + if (nb) { >> + x25_link_terminated(nb); >> + x25_neigh_put(nb); >> + } >> + } >> + break; >> } >> } > > I think L2 will notify L3 if the L2 connection is terminated. Is this > patch necessary? Hmm... well I guess you're right. Admittedly, these patches were made about 7 - 8 years ago and I have to keep thinking about them. But I can't think of any situation where this patch should be necessary at the moment. I will drop this patch from the patch-set.
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index 25726120fcc7..6a95ca11694e 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -275,6 +275,19 @@ static int x25_device_event(struct notifier_block *this, unsigned long event, dev->name); x25_link_device_remove(dev); break; + case NETDEV_CHANGE: + pr_debug("X.25: got event NETDEV_CHANGE for device: %s\n", + dev->name); + if (!netif_carrier_ok(dev)) { + pr_debug("X.25: Carrier lost -> set link state down: %s\n", + dev->name); + nb = x25_get_neigh(dev); + if (nb) { + x25_link_terminated(nb); + x25_neigh_put(nb); + } + } + break; } }
This makes it possible to handle carrier lost and detection. In case of carrier lost, we shutdown layer 3 and flush all sessions. Signed-off-by: Martin Schiller <ms@dev.tdt.de> --- Change from v1: fix 'subject_prefix' and 'checkpatch' warnings --- net/x25/af_x25.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)