netdev - Re: [PATCH RFC iproute2-next 1/2] rdma: add 'link add/delete' commands

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Date:   Wed, 28 Nov 2018 14:07:29 -0600
From:   Steve Wise <swise@...ngridcomputing.com>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     dsahern@...il.com, stephen@...workplumber.org,
        netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        BMT@...ich.ibm.com
Subject: Re: [PATCH RFC iproute2-next 1/2] rdma: add 'link add/delete'
 commands



On 11/28/2018 2:04 PM, Leon Romanovsky wrote:
> On Wed, Nov 28, 2018 at 01:08:05PM -0600, Steve Wise wrote:
>>
>> On 11/28/2018 12:26 PM, Leon Romanovsky wrote:
>>> On Thu, Sep 13, 2018 at 10:19:21AM -0700, Steve Wise wrote:
>>>> Add new 'link' subcommand 'add' and 'delete' to allow binding a soft-rdma
>>>> device to a netdev interface.
>>>>
>>>> EG:
>>>>
>>>> rdma link add rxe_eth0 type rxe dev eth0
>>>> rdma link delete rxe_eth0
>>>>
>>>> Signed-off-by: Steve Wise <swise@...ngridcomputing.com>
>>>> ---
>>>>  rdma/link.c  | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>>>  rdma/rdma.h  |   1 +
>>>>  rdma/utils.c |   2 +-
>>>>  3 files changed, 108 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/rdma/link.c b/rdma/link.c
>>>> index 7a6d4b7e356d..d4f76b0ce11f 100644
>>>> --- a/rdma/link.c
>>>> +++ b/rdma/link.c
>>>> @@ -14,6 +14,8 @@
>>>>  static int link_help(struct rd *rd)
>>>>  {
>>>>  	pr_out("Usage: %s link show [DEV/PORT_INDEX]\n", rd->filename);
>>>> +	pr_out("Usage: %s link add NAME type TYPE dev DEV\n", rd->filename);
>>> I suggest to rename "dev" to be "netdev", because we are using "dev" for
>>> ib devices.
>> Yea ok.
>>
>>>> +	pr_out("Usage: %s link delete NAME type TYPE\n", rd->filename);
>>> Why do you need "type" for "delete" command?
>> Because the type is used in the kernel to find the appropriate link
>> ops.  I could change the kernel side to search all types for the device
>> name to delete? 
> I would say, yes.
> It makes "delete" operation more natural.
>
> Thanks

Perhaps.

Note: 'ip link delete' takes a type as well...