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

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Message-ID: <20181128200412.GP4559@mtr-leonro.mtl.com>
Date:   Wed, 28 Nov 2018 22:04:12 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Steve Wise <swise@...ngridcomputing.com>
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 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

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