netdev - RE: [PATCH iproute2-next v3] rdma: Document IB device renaming option

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Date:   Fri, 16 Nov 2018 20:10:35 +0000
From:   "Ruhl, Michael J" <michael.j.ruhl@...el.com>
To:     Leon Romanovsky <leon@...nel.org>, David Ahern <dsahern@...il.com>
CC:     Leon Romanovsky <leonro@...lanox.com>,
        netdev <netdev@...r.kernel.org>,
        RDMA mailing list <linux-rdma@...r.kernel.org>,
        Stephen Hemminger <stephen@...workplumber.org>
Subject: RE: [PATCH iproute2-next v3] rdma: Document IB device renaming
 option

>-----Original Message-----
>From: linux-rdma-owner@...r.kernel.org [mailto:linux-rdma-
>owner@...r.kernel.org] On Behalf Of Leon Romanovsky
>Sent: Sunday, November 4, 2018 2:11 PM
>To: David Ahern <dsahern@...il.com>
>Cc: Leon Romanovsky <leonro@...lanox.com>; netdev
><netdev@...r.kernel.org>; RDMA mailing list <linux-rdma@...r.kernel.org>;
>Stephen Hemminger <stephen@...workplumber.org>
>Subject: [PATCH iproute2-next v3] rdma: Document IB device renaming
>option
>
>From: Leon Romanovsky <leonro@...lanox.com>

Hi Leon,

After looking at this and Steve Wise's changes for the ADDLINK/DELLINK,
it occurred to me that the driver that handed the name to ib_register_device()
might be interested in knowing that this name change occurred.

Are there plans to include a some kind of notify mechanism so drivers can
find out when things like this occur?

Is this something that should be done?

Thanks,

Mike

>[leonro@...ver /]$ lspci |grep -i Ether
>00:08.0 Ethernet controller: Red Hat, Inc. Virtio network device
>00:09.0 Ethernet controller: Mellanox Technologies MT27700 Family
>[ConnectX-4]
>[leonro@...ver /]$ sudo rdma dev
>1: mlx5_0: node_type ca fw 3.8.9999 node_guid 5254:00c0:fe12:3455
>sys_image_guid 5254:00c0:fe12:3455
>[leonro@...ver /]$ sudo rdma dev set mlx5_0 name hfi1_0
>[leonro@...ver /]$ sudo rdma dev
>1: hfi1_0: node_type ca fw 3.8.9999 node_guid 5254:00c0:fe12:3455
>sys_image_guid 5254:00c0:fe12:3455
>
>Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
>---
>Changelog:
>v2->v3:
> * Dropped "to be named" words from example section of man
>---
> man/man8/rdma-dev.8 | 15 ++++++++++++++-
> 1 file changed, 14 insertions(+), 1 deletion(-)
>
>diff --git a/man/man8/rdma-dev.8 b/man/man8/rdma-dev.8
>index 461681b6..7c275180 100644
>--- a/man/man8/rdma-dev.8
>+++ b/man/man8/rdma-dev.8
>@@ -1,6 +1,6 @@
> .TH RDMA\-DEV 8 "06 Jul 2017" "iproute2" "Linux"
> .SH NAME
>-rdmak-dev \- RDMA device configuration
>+rdma-dev \- RDMA device configuration
> .SH SYNOPSIS
> .sp
> .ad l
>@@ -22,10 +22,18 @@ rdmak-dev \- RDMA device configuration
> .B rdma dev show
> .RI "[ " DEV " ]"
>
>+.ti -8
>+.B rdma dev set
>+.RI "[ " DEV " ]"
>+.BR name
>+.BR NEWNAME
>+
> .ti -8
> .B rdma dev help
>
> .SH "DESCRIPTION"
>+.SS rdma dev set - rename rdma device
>+
> .SS rdma dev show - display rdma device attributes
>
> .PP
>@@ -45,6 +53,11 @@ rdma dev show mlx5_3
> Shows the state of specified RDMA device.
> .RE
> .PP
>+rdma dev set mlx5_3 name rdma_0
>+.RS 4
>+Renames the mlx5_3 device to rdma_0.
>+.RE
>+.PP
>
> .SH SEE ALSO
> .BR rdma (8),
>--
>2.19.1