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From: Logan Gunthorpe <logang@deltatee.com>
To: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	Omar Sandoval <osandov@osandov.com>
Cc: Sagi Grimberg <sagi@grimberg.me>, Stephen Bates <sbates@raithlin.com>
Subject: Re: [PATCH blktests v2 04/11] nvme: Search for specific subsysnqn in _find_nvme_loop_dev
Date: Tue, 6 Oct 2020 18:10:16 -0600	[thread overview]
Message-ID: <517a5fd9-50eb-eb5e-5911-093dc5d1a759@deltatee.com> (raw)
In-Reply-To: <BYAPR04MB49657A481271ADC1F576377B860D0@BYAPR04MB4965.namprd04.prod.outlook.com>



On 2020-10-06 5:55 p.m., Chaitanya Kulkarni wrote:
> On 9/30/20 11:54, Logan Gunthorpe wrote:
>> This ensures we find the correct nvme loop device if others exist on a
>> given system (which is generally not expected on test systems).
>>
>> Additionally, this will be required in the upcomming test nvme/037 which
>> will have controllers racing with ones being destroyed.
>>
>> Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
> 
> If I create a passthru testcase with :-
> 
> 1. Create nvme-loop based nvme ctrl backed by null_blk say /dev/nvme1
> 
> 2. Create a nvme-loop based passthru ctrl backed by /dev/nvme1 say nvme2.
> 
> 
> With this patch or this series will I be able to write the testcase ?

This patch helps with that but other helpers introduced in this series
would require minor changes.

As far as I can see, you'd only have to adjust _create_nvmet_passthru()
to take an optional argument because, presently, it always uses
$_test_dev_nvme_ctrl for the backing device.

This can easily be done if and when someone writes such a test.

However, I'm not even sure right now if that test would pass in the
kernel as is -- it seems like an odd thing to do.

Logan

WARNING: multiple messages have this Message-ID (diff)
From: Logan Gunthorpe <logang@deltatee.com>
To: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	Omar Sandoval <osandov@osandov.com>
Cc: Sagi Grimberg <sagi@grimberg.me>, Stephen Bates <sbates@raithlin.com>
Subject: Re: [PATCH blktests v2 04/11] nvme: Search for specific subsysnqn in _find_nvme_loop_dev
Date: Tue, 6 Oct 2020 18:10:16 -0600	[thread overview]
Message-ID: <517a5fd9-50eb-eb5e-5911-093dc5d1a759@deltatee.com> (raw)
In-Reply-To: <BYAPR04MB49657A481271ADC1F576377B860D0@BYAPR04MB4965.namprd04.prod.outlook.com>



On 2020-10-06 5:55 p.m., Chaitanya Kulkarni wrote:
> On 9/30/20 11:54, Logan Gunthorpe wrote:
>> This ensures we find the correct nvme loop device if others exist on a
>> given system (which is generally not expected on test systems).
>>
>> Additionally, this will be required in the upcomming test nvme/037 which
>> will have controllers racing with ones being destroyed.
>>
>> Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
> 
> If I create a passthru testcase with :-
> 
> 1. Create nvme-loop based nvme ctrl backed by null_blk say /dev/nvme1
> 
> 2. Create a nvme-loop based passthru ctrl backed by /dev/nvme1 say nvme2.
> 
> 
> With this patch or this series will I be able to write the testcase ?

This patch helps with that but other helpers introduced in this series
would require minor changes.

As far as I can see, you'd only have to adjust _create_nvmet_passthru()
to take an optional argument because, presently, it always uses
$_test_dev_nvme_ctrl for the backing device.

This can easily be done if and when someone writes such a test.

However, I'm not even sure right now if that test would pass in the
kernel as is -- it seems like an odd thing to do.

Logan

_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme

  reply	other threads:[~2020-10-07  0:10 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-30 18:54 [PATCH blktests v2 00/11] NVMe Target Passthru Block Tests Logan Gunthorpe
2020-09-30 18:54 ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 01/11] common/fio: Remove state file in common helper Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 02/11] common/xfs: Create common helper to check for XFS support Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-10-06 23:44   ` Chaitanya Kulkarni
2020-10-06 23:44     ` Chaitanya Kulkarni
2020-10-06 23:51     ` Logan Gunthorpe
2020-10-06 23:51       ` Logan Gunthorpe
2020-10-07  0:58       ` Chaitanya Kulkarni
2020-10-07  0:58         ` Chaitanya Kulkarni
2020-09-30 18:54 ` [PATCH blktests v2 03/11] common/xfs: Create common helper to verify block device with xfs Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-10-06 23:50   ` Chaitanya Kulkarni
2020-10-06 23:50     ` Chaitanya Kulkarni
2020-10-06 23:59     ` Logan Gunthorpe
2020-10-06 23:59       ` Logan Gunthorpe
     [not found]       ` <BYAPR04MB49652338A4FE3805F9394A88860A0@BYAPR04MB4965.namprd04.prod.outlook.com>
2020-10-07 15:53         ` Logan Gunthorpe
2020-10-07 15:53           ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 04/11] nvme: Search for specific subsysnqn in _find_nvme_loop_dev Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-10-06 23:55   ` Chaitanya Kulkarni
2020-10-06 23:55     ` Chaitanya Kulkarni
2020-10-07  0:10     ` Logan Gunthorpe [this message]
2020-10-07  0:10       ` Logan Gunthorpe
     [not found]       ` <BYAPR04MB49650C6419A84705D04FFE63860A0@BYAPR04MB4965.namprd04.prod.outlook.com>
2020-10-07 15:55         ` Logan Gunthorpe
2020-10-07 15:55           ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 05/11] nvme: Add common helpers for passthru tests Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-10-07  0:02   ` Chaitanya Kulkarni
2020-10-07  0:02     ` Chaitanya Kulkarni
2020-10-07  0:13     ` Logan Gunthorpe
2020-10-07  0:13       ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 06/11] nvme/033: Simple test to create and connect to a passthru target Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 07/11] nvme/034: Add test for passthru data verification Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 08/11] nvme/035: Add test to verify passthru controller with a filesystem Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 09/11] nvme/036: Add test for testing reset command on nvme-passthru Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 10/11] nvme/037: Add test which loops passthru connect and disconnect Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe
2020-09-30 18:54 ` [PATCH blktests v2 11/11] nvme/038: Test removal of un-enabled subsystem and ports Logan Gunthorpe
2020-09-30 18:54   ` Logan Gunthorpe

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