* [patch net-next] vrf: add exit function and allow module unload
@ 2016-05-04 10:20 Jiri Pirko
2016-05-04 10:23 ` Hannes Frederic Sowa
0 siblings, 1 reply; 5+ messages in thread
From: Jiri Pirko @ 2016-05-04 10:20 UTC (permalink / raw)
To: netdev; +Cc: davem, idosch, eladr, yotamg, dsa, shm
From: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
---
drivers/net/vrf.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
index 8a8f1e5..b217c2d 100644
--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c
@@ -839,7 +839,14 @@ error:
return rc;
}
+static void __exit vrf_exit_module(void)
+{
+ rtnl_link_unregister(&vrf_link_ops);
+ unregister_netdevice_notifier(&vrf_notifier_block);
+}
+
module_init(vrf_init_module);
+module_exit(vrf_exit_module);
MODULE_AUTHOR("Shrijeet Mukherjee, David Ahern");
MODULE_DESCRIPTION("Device driver to instantiate VRF domains");
MODULE_LICENSE("GPL");
--
2.5.5
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [patch net-next] vrf: add exit function and allow module unload
2016-05-04 10:20 [patch net-next] vrf: add exit function and allow module unload Jiri Pirko
@ 2016-05-04 10:23 ` Hannes Frederic Sowa
2016-05-04 10:24 ` Jiri Pirko
2016-05-04 16:05 ` David Ahern
0 siblings, 2 replies; 5+ messages in thread
From: Hannes Frederic Sowa @ 2016-05-04 10:23 UTC (permalink / raw)
To: Jiri Pirko, netdev; +Cc: davem, idosch, eladr, yotamg, dsa, shm
Hello Jiri,
On Wed, May 4, 2016, at 12:20, Jiri Pirko wrote:
> drivers/net/vrf.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
> index 8a8f1e5..b217c2d 100644
> --- a/drivers/net/vrf.c
> +++ b/drivers/net/vrf.c
> @@ -839,7 +839,14 @@ error:
> return rc;
> }
>
> +static void __exit vrf_exit_module(void)
> +{
> + rtnl_link_unregister(&vrf_link_ops);
> + unregister_netdevice_notifier(&vrf_notifier_block);
> +}
> +
> module_init(vrf_init_module);
> +module_exit(vrf_exit_module);
The dst_entries created by vrf don't carry a reference to THIS_MODULE
but have a code dependency to the vrf module (e.g. via
vrf_output/vrf_output6) that gets published. This is exactly the same
why ipv6 cannot be unloaded.
Bye,
Hannes
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [patch net-next] vrf: add exit function and allow module unload
2016-05-04 10:23 ` Hannes Frederic Sowa
@ 2016-05-04 10:24 ` Jiri Pirko
2016-05-04 15:59 ` David Miller
2016-05-04 16:05 ` David Ahern
1 sibling, 1 reply; 5+ messages in thread
From: Jiri Pirko @ 2016-05-04 10:24 UTC (permalink / raw)
To: Hannes Frederic Sowa; +Cc: netdev, davem, idosch, eladr, yotamg, dsa, shm
Wed, May 04, 2016 at 12:23:42PM CEST, hannes@stressinduktion.org wrote:
>Hello Jiri,
>
>On Wed, May 4, 2016, at 12:20, Jiri Pirko wrote:
>> drivers/net/vrf.c | 7 +++++++
>> 1 file changed, 7 insertions(+)
>>
>> diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
>> index 8a8f1e5..b217c2d 100644
>> --- a/drivers/net/vrf.c
>> +++ b/drivers/net/vrf.c
>> @@ -839,7 +839,14 @@ error:
>> return rc;
>> }
>>
>> +static void __exit vrf_exit_module(void)
>> +{
>> + rtnl_link_unregister(&vrf_link_ops);
>> + unregister_netdevice_notifier(&vrf_notifier_block);
>> +}
>> +
>> module_init(vrf_init_module);
>> +module_exit(vrf_exit_module);
>
>The dst_entries created by vrf don't carry a reference to THIS_MODULE
>but have a code dependency to the vrf module (e.g. via
>vrf_output/vrf_output6) that gets published. This is exactly the same
>why ipv6 cannot be unloaded.
Oh. Okay. Thanks!
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [patch net-next] vrf: add exit function and allow module unload
2016-05-04 10:24 ` Jiri Pirko
@ 2016-05-04 15:59 ` David Miller
0 siblings, 0 replies; 5+ messages in thread
From: David Miller @ 2016-05-04 15:59 UTC (permalink / raw)
To: jiri; +Cc: hannes, netdev, idosch, eladr, yotamg, dsa, shm
From: Jiri Pirko <jiri@resnulli.us>
Date: Wed, 4 May 2016 12:24:55 +0200
> Wed, May 04, 2016 at 12:23:42PM CEST, hannes@stressinduktion.org wrote:
>>Hello Jiri,
>>
>>On Wed, May 4, 2016, at 12:20, Jiri Pirko wrote:
>>> drivers/net/vrf.c | 7 +++++++
>>> 1 file changed, 7 insertions(+)
>>>
>>> diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
>>> index 8a8f1e5..b217c2d 100644
>>> --- a/drivers/net/vrf.c
>>> +++ b/drivers/net/vrf.c
>>> @@ -839,7 +839,14 @@ error:
>>> return rc;
>>> }
>>>
>>> +static void __exit vrf_exit_module(void)
>>> +{
>>> + rtnl_link_unregister(&vrf_link_ops);
>>> + unregister_netdevice_notifier(&vrf_notifier_block);
>>> +}
>>> +
>>> module_init(vrf_init_module);
>>> +module_exit(vrf_exit_module);
>>
>>The dst_entries created by vrf don't carry a reference to THIS_MODULE
>>but have a code dependency to the vrf module (e.g. via
>>vrf_output/vrf_output6) that gets published. This is exactly the same
>>why ipv6 cannot be unloaded.
>
> Oh. Okay. Thanks!
So I'm dropping this.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [patch net-next] vrf: add exit function and allow module unload
2016-05-04 10:23 ` Hannes Frederic Sowa
2016-05-04 10:24 ` Jiri Pirko
@ 2016-05-04 16:05 ` David Ahern
1 sibling, 0 replies; 5+ messages in thread
From: David Ahern @ 2016-05-04 16:05 UTC (permalink / raw)
To: Hannes Frederic Sowa, Jiri Pirko, netdev
Cc: davem, idosch, eladr, yotamg, shm
On 5/4/16 4:23 AM, Hannes Frederic Sowa wrote:
> Hello Jiri,
>
> On Wed, May 4, 2016, at 12:20, Jiri Pirko wrote:
>> drivers/net/vrf.c | 7 +++++++
>> 1 file changed, 7 insertions(+)
>>
>> diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
>> index 8a8f1e5..b217c2d 100644
>> --- a/drivers/net/vrf.c
>> +++ b/drivers/net/vrf.c
>> @@ -839,7 +839,14 @@ error:
>> return rc;
>> }
>>
>> +static void __exit vrf_exit_module(void)
>> +{
>> + rtnl_link_unregister(&vrf_link_ops);
>> + unregister_netdevice_notifier(&vrf_notifier_block);
>> +}
>> +
>> module_init(vrf_init_module);
>> +module_exit(vrf_exit_module);
>
> The dst_entries created by vrf don't carry a reference to THIS_MODULE
> but have a code dependency to the vrf module (e.g. via
> vrf_output/vrf_output6) that gets published. This is exactly the same
> why ipv6 cannot be unloaded.
exactly. The module exit was removed recently by 9ab179d83b4e ("net:
vrf: Fix dst reference counting")
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2016-05-04 16:05 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2016-05-04 10:20 [patch net-next] vrf: add exit function and allow module unload Jiri Pirko
2016-05-04 10:23 ` Hannes Frederic Sowa
2016-05-04 10:24 ` Jiri Pirko
2016-05-04 15:59 ` David Miller
2016-05-04 16:05 ` David Ahern
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