在 2022/10/28 11:31, Parav Pandit 写道:
From: Yanjun Zhu <yanjun.zhu@xxxxxxxxx>
Sent: Thursday, October 27, 2022 11:21 PM
在 2022/10/27 22:06, Parav Pandit 写道:
From: yanjun.zhu@xxxxxxxxx <yanjun.zhu@xxxxxxxxx>
Sent: Thursday, October 27, 2022 2:02 AM
To: Parav Pandit <parav@xxxxxxxxxx>; dust.li@xxxxxxxxxxxxxxxxx; Zhu
Yanjun <yanjun.zhu@xxxxxxxxx>; jgg@xxxxxxxx; leon@xxxxxxxxxx; linux-
rdma@xxxxxxxxxxxxxxx
Subject: Re: [PATCH 0/3] RDMA net namespace
October 27, 2022 11:48 AM, "Parav Pandit" <parav@xxxxxxxxxx> wrote:
From: yanjun.zhu@xxxxxxxxx <yanjun.zhu@xxxxxxxxx>
Sent: Wednesday, October 26, 2022 11:39 PM
October 27, 2022 11:21 AM, "Parav Pandit" <parav@xxxxxxxxxx> wrote:
From: yanjun.zhu@xxxxxxxxx <yanjun.zhu@xxxxxxxxx>
Sent: Wednesday, October 26, 2022 11:17 PM
October 27, 2022 11:10 AM, "Parav Pandit" <parav@xxxxxxxxxx> wrote:
From: yanjun.zhu@xxxxxxxxx <yanjun.zhu@xxxxxxxxx>
Sent: Wednesday, October 26, 2022 11:08 PM
October 27, 2022 11:01 AM, "Parav Pandit" <parav@xxxxxxxxxx> wrote:
From: Dust Li <dust.li@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, October 26, 2022 10:31 PM
2. else we are in
exclusive mode. When the corresponding netdevice of the RoCE or
iWarp device is moved from one net namespace to another, we move
the
RDMA
device into that net namespace
What do you think ?
No. one device is not supposed to move other devices.
Every device is independent that should be moved by explicit
command.
Can you show us where we can find this rule "Every device is
independent that should be moved by explicit command."?
Also changes like above breaks the existing orchestration, it no-go.
And I do not find the rule that you mentioned.
There is no Linux kernel subsystem or module to my knowledge that
attempt to move multiple devices using single command.
When user executes command , user explicitly give device name "foo",
only "foo" should move.
Other loosely coupled device whose name is not specified in the ip
command which has a different life cycle should not move along with
"foo".
You are trying to define the new rule that breaks the existing ABI
and the iproute2 (ip and rdma) command semantics.
It is implicit that when command is issued on device A, operate on
device A. This is part of
iproute2 functioning.
About iproute2, I read this link
https://wiki.linuxfoundation.org/networking/iproute2#documentation
There is no rules that you mentioned.
This rule is defined explicitly or implicitly?
Wiki pages links are not the documentation.
Man pages of the iproute2 is documentation of iproute2 at [1] and [2].
[1] https://man7.org/linux/man-pages/man8/rdma-system.8.html
[2] https://man7.org/linux/man-pages/man8/rdma-dev.8.html
As I explained, the explicit rule that you are looking for that say "when I
modify device foo, it can also modifies the device bar".
Because no part of the Linux kernel does that usually, unless the device is
representor/control object etc or has parent/child relationship.
It is fundamental to a command definition, not a matter of explicit or
implicit.
From the ABI, iproute2 and current rdma command links, I can not find the
rule that you mentioned.
Can you tell me the exact link that make such definition?
I explained you already above. You are repeating your weird question.
You mentioned that it is a rule. I just want to know where it is defined.
Can you show one iproute2 example, where you specify a command on device A, and kernel operates on device, A, P, Q, R?
When you add a net devices to a bonding device, you will find changes on
the bonding device and the net devices.
Or some other commands like this.
Zhu Yanjun
This is the attempt you are trying to do for unknown reasons.
So, can you please explain, what is the problem in using existing rdma dev commands that move rdma device to net namespace?
And clearly in this discussion foo and bar are loosely coupled network
devices, one is not controlling the other.
Also, a rdma device is attached to multiple net devices, primary and other
upper devices such as vlan, macvlan etc.
To a RoCE device, how to attach a rdma device to vlan, macvlan?
To "a rdma device is attached to multiple net devices, primary and other
upper devices such as vlan, macvlan etc",
Can you show us an example? The rdma device is RoCE device, iWarp or ipoib
device?
Rdma device is roce device.
Add vlan, macvlan device on top of the netdevice linked to the roce device using iproute2.
