linux-kernel - Re: [PATCH v8] net: openvswitch

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Date:	Wed, 16 Jul 2014 16:24:14 -0700
From:	Pravin Shelar <pshelar@...ira.com>
To:	Tom Gundersen <teg@...m.no>
Cc:	netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	LKML <linux-kernel@...r.kernel.org>,
	"dev@...nvswitch.org" <dev@...nvswitch.org>
Subject: Re: [PATCH v8] net: openvswitch - set name assign type

On Wed, Jul 16, 2014 at 4:16 PM, Tom Gundersen <teg@...m.no> wrote:
> On Thu, Jul 17, 2014 at 1:00 AM, Pravin Shelar <pshelar@...ira.com> wrote:
>> On Wed, Jul 16, 2014 at 3:43 PM, Tom Gundersen <teg@...m.no> wrote:
>>> Signed-off-by: Tom Gundersen <teg@...m.no>
>>> Cc: Pravin Shelar <pshelar@...ira.com>
>>> Cc: dev@...nvswitch.org
>>> ---
>>>
>>> This patch goes on top of net-next.
>>>
>>>  net/openvswitch/datapath.c           | 1 +
>>>  net/openvswitch/vport-internal_dev.c | 2 +-
>>>  net/openvswitch/vport.h              | 2 ++
>>>  3 files changed, 4 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
>>> index fe95b6c..c1400c0 100644
>>> --- a/net/openvswitch/datapath.c
>>> +++ b/net/openvswitch/datapath.c
>>> @@ -1370,6 +1370,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>>>
>>>         /* Set up our datapath device. */
>>>         parms.name = nla_data(a[OVS_DP_ATTR_NAME]);
>>> +       parms.name_assign_type = NET_NAME_USER;
>>>         parms.type = OVS_VPORT_TYPE_INTERNAL;
>>>         parms.options = NULL;
>>>         parms.dp = dp;
>>> diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c
>>> index bd65855..df185a7 100644
>>> --- a/net/openvswitch/vport-internal_dev.c
>>> +++ b/net/openvswitch/vport-internal_dev.c
>>> @@ -165,7 +165,7 @@ static struct vport *internal_dev_create(const struct vport_parms *parms)
>>>         netdev_vport = netdev_vport_priv(vport);
>>>
>>>         netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
>>> -                                        parms->name, NET_NAME_UNKNOWN,
>>> +                                        parms->name, parms->name_assign_type,
>>>                                          do_setup);
>>>         if (!netdev_vport->dev) {
>>>                 err = -ENOMEM;
>>
>> vport name is always configured by user. Therefore can you just
>> replace NET_NAME_UNKNOWN with NET_NAME_USER while calling
>> alloc_netdev().
>
> I did it in this way to 1) make it trivial to review the patch without
> necessarily knowing the code very well and 2) decrease the likelihood
> of whomever changes these things in the future accidentally breaking
> the labelling (e.g. by introducing a new caller of
> internal_dev_create, which sets the ifname from a different source).
>
At this point it is unlikely that those names would be set by different source.

> Your way would work to of course, let me know if I should redo it like that.
>

yes, it is simple that way.

Thanks.


> Cheers,
>
> Tom
>
>>> diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h
>>> index 8d721e6..a9d7480 100644
>>> --- a/net/openvswitch/vport.h
>>> +++ b/net/openvswitch/vport.h
>>> @@ -97,6 +97,7 @@ struct vport {
>>>   * struct vport_parms - parameters for creating a new vport
>>>   *
>>>   * @name: New vport's name.
>>> + * @name_assign_type: New vport's name's origin.
>>>   * @type: New vport's type.
>>>   * @options: %OVS_VPORT_ATTR_OPTIONS attribute from Netlink message, %NULL if
>>>   * none was supplied.
>>> @@ -105,6 +106,7 @@ struct vport {
>>>   */
>>>  struct vport_parms {
>>>         const char *name;
>>> +       unsigned char name_assign_type;
>>>         enum ovs_vport_type type;
>>>         struct nlattr *options;
>>>
>>> --
>>> 1.9.3
>>>
>> --
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