* [PATCH] net: allow interface to be set into vrf if a vif in same vrf
@ 2018-02-26 16:48 Mike Manning
2018-02-26 16:53 ` David Ahern
2018-03-01 18:28 ` David Miller
0 siblings, 2 replies; 5+ messages in thread
From: Mike Manning @ 2018-02-26 16:48 UTC (permalink / raw)
To: netdev, dsahern
Setting an interface into a vrf fails with 'RTNETLINK answers: File
exists' if one of its vifs is already in the same vrf. As the vrf is an
upper device of the vif, it is also showing up as an upper device of
the interface itself. The solution is to restrict this check to devices
other than master. As only one master device can be linked to a device,
in this case the check is for the upper device (vrf) to be linked to as
being the master device rather than any other upper device.
Signed-off-by: Mike Manning <mmanning@att.com>
---
net/core/dev.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index d4362be..2cedf52 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6396,6 +6396,7 @@ static int __netdev_upper_dev_link(struct net_device *dev,
.linking = true,
.upper_info = upper_info,
};
+ struct net_device *master_dev;
int ret = 0;
ASSERT_RTNL();
@@ -6407,11 +6408,14 @@ static int __netdev_upper_dev_link(struct net_device *dev,
if (netdev_has_upper_dev(upper_dev, dev))
return -EBUSY;
- if (netdev_has_upper_dev(dev, upper_dev))
- return -EEXIST;
-
- if (master && netdev_master_upper_dev_get(dev))
- return -EBUSY;
+ if (!master) {
+ if (netdev_has_upper_dev(dev, upper_dev))
+ return -EEXIST;
+ } else {
+ master_dev = netdev_master_upper_dev_get(dev);
+ if (master_dev)
+ return master_dev == upper_dev ? -EEXIST : -EBUSY;
+ }
ret = call_netdevice_notifiers_info(NETDEV_PRECHANGEUPPER,
&changeupper_info.info);
--
2.1.4
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] net: allow interface to be set into vrf if a vif in same vrf
2018-02-26 16:48 [PATCH] net: allow interface to be set into vrf if a vif in same vrf Mike Manning
@ 2018-02-26 16:53 ` David Ahern
2018-03-01 18:28 ` David Miller
1 sibling, 0 replies; 5+ messages in thread
From: David Ahern @ 2018-02-26 16:53 UTC (permalink / raw)
To: Mike Manning, netdev
On 2/26/18 9:48 AM, Mike Manning wrote:
> Setting an interface into a vrf fails with 'RTNETLINK answers: File
> exists' if one of its vifs is already in the same vrf. As the vrf is an
> upper device of the vif, it is also showing up as an upper device of
> the interface itself. The solution is to restrict this check to devices
> other than master. As only one master device can be linked to a device,
> in this case the check is for the upper device (vrf) to be linked to as
> being the master device rather than any other upper device.
I'm not understanding what you mean by vif in this context. Can you
elaborate and show an example set of commands?
>
> Signed-off-by: Mike Manning <mmanning@att.com>
> ---
> net/core/dev.c | 14 +++++++++-----
> 1 file changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/net/core/dev.c b/net/core/dev.c
> index d4362be..2cedf52 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -6396,6 +6396,7 @@ static int __netdev_upper_dev_link(struct net_device *dev,
> .linking = true,
> .upper_info = upper_info,
> };
> + struct net_device *master_dev;
> int ret = 0;
>
> ASSERT_RTNL();
> @@ -6407,11 +6408,14 @@ static int __netdev_upper_dev_link(struct net_device *dev,
> if (netdev_has_upper_dev(upper_dev, dev))
> return -EBUSY;
>
> - if (netdev_has_upper_dev(dev, upper_dev))
> - return -EEXIST;
> -
> - if (master && netdev_master_upper_dev_get(dev))
> - return -EBUSY;
> + if (!master) {
> + if (netdev_has_upper_dev(dev, upper_dev))
> + return -EEXIST;
> + } else {
> + master_dev = netdev_master_upper_dev_get(dev);
> + if (master_dev)
> + return master_dev == upper_dev ? -EEXIST : -EBUSY;
> + }
>
> ret = call_netdevice_notifiers_info(NETDEV_PRECHANGEUPPER,
> &changeupper_info.info);
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] net: allow interface to be set into vrf if a vif in same vrf
2018-02-26 16:48 [PATCH] net: allow interface to be set into vrf if a vif in same vrf Mike Manning
2018-02-26 16:53 ` David Ahern
@ 2018-03-01 18:28 ` David Miller
2018-03-01 18:30 ` David Ahern
1 sibling, 1 reply; 5+ messages in thread
From: David Miller @ 2018-03-01 18:28 UTC (permalink / raw)
To: mmanning; +Cc: netdev, dsahern
From: Mike Manning <mmanning@vyatta.mail-att.com>
Date: Mon, 26 Feb 2018 16:48:56 +0000
> Setting an interface into a vrf fails with 'RTNETLINK answers: File
> exists' if one of its vifs is already in the same vrf. As the vrf is an
> upper device of the vif, it is also showing up as an upper device of
> the interface itself. The solution is to restrict this check to devices
> other than master. As only one master device can be linked to a device,
> in this case the check is for the upper device (vrf) to be linked to as
> being the master device rather than any other upper device.
>
> Signed-off-by: Mike Manning <mmanning@att.com>
David A., please review.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] net: allow interface to be set into vrf if a vif in same vrf
2018-03-01 18:28 ` David Miller
@ 2018-03-01 18:30 ` David Ahern
0 siblings, 0 replies; 5+ messages in thread
From: David Ahern @ 2018-03-01 18:30 UTC (permalink / raw)
To: David Miller, mmanning; +Cc: netdev, Jiri Pirko, roopa
[ Fixed Mike's email ]
On 3/1/18 11:28 AM, David Miller wrote:
> From: Mike Manning <mmanning@vyatta.mail-att.com>
> Date: Mon, 26 Feb 2018 16:48:56 +0000
>
>> Setting an interface into a vrf fails with 'RTNETLINK answers: File
>> exists' if one of its vifs is already in the same vrf. As the vrf is an
>> upper device of the vif, it is also showing up as an upper device of
>> the interface itself. The solution is to restrict this check to devices
>> other than master. As only one master device can be linked to a device,
>> in this case the check is for the upper device (vrf) to be linked to as
>> being the master device rather than any other upper device.
>>
>> Signed-off-by: Mike Manning <mmanning@att.com>
>
> David A., please review.
>
This one has been superseded by "[PATCH] net: allow interface to be set
into VRF if VLAN interface in same VRF"
^ permalink raw reply [flat|nested] 5+ messages in thread
[parent not found: <61cddbff-8a2b-426e-9d43-29ab2ebb2493@mail.eng.vyatta.net>]
end of thread, other threads:[~2018-03-01 18:30 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2018-02-26 16:48 [PATCH] net: allow interface to be set into vrf if a vif in same vrf Mike Manning
2018-02-26 16:53 ` David Ahern
2018-03-01 18:28 ` David Miller
2018-03-01 18:30 ` David Ahern
[not found] <61cddbff-8a2b-426e-9d43-29ab2ebb2493@mail.eng.vyatta.net>
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2018-02-26 20:43 ` David Ahern
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