linux-kernel - Re: [PATCH 02/14] target: Add DIF CHECK

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Message-ID: <52D517DE.50009@dev.mellanox.co.il>
Date:	Tue, 14 Jan 2014 12:56:30 +0200
From:	Sagi Grimberg <sagig@....mellanox.co.il>
To:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
CC:	target-devel <target-devel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>,
	Or Gerlitz <ogerlitz@...lanox.com>
Subject: Re: [PATCH 02/14] target: Add DIF CHECK_CONDITION ASC/ASCQ exception
 cases

On 1/14/2014 10:53 AM, Nicholas A. Bellinger wrote:
> On Tue, 2014-01-14 at 09:44 +0200, Sagi Grimberg wrote:
>> On 1/10/2014 8:53 AM, Nicholas A. Bellinger wrote:
>>> On Thu, 2014-01-09 at 12:43 +0200, Sagi Grimberg wrote:
>>>> On 1/8/2014 10:36 PM, Nicholas A. Bellinger wrote:
>>>>> From: Nicholas Bellinger <nab@...ux-iscsi.org>
>>>>>
>>>>> This patch adds support for DIF related CHECK_CONDITION ASC/ASCQ
>>>>> exception cases into transport_send_check_condition_and_sense().
>>>>>
>>>>> This includes:
>>>>>
>>>>>      LOGICAL BLOCK GUARD CHECK FAILED
>>>>>      LOGICAL BLOCK APPLICATION TAG CHECK FAILED
>>>>>      LOGICAL BLOCK REFERENCE TAG CHECK FAILED
>>>>>
>>>>> that used by DIF TYPE1 and TYPE3 failure cases.
>>>>>
>>>>> Cc: Martin K. Petersen <martin.petersen@...cle.com>
>>>>> Cc: Christoph Hellwig <hch@....de>
>>>>> Cc: Hannes Reinecke <hare@...e.de>
>>>>> Cc: Sagi Grimberg <sagig@...lanox.com>
>>>>> Cc: Or Gerlitz <ogerlitz@...lanox.com>
>>>>> Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
>>>>> ---
>>>>>     drivers/target/target_core_transport.c |   30 ++++++++++++++++++++++++++++++
>>>>>     include/target/target_core_base.h      |    3 +++
>>>>>     2 files changed, 33 insertions(+)
>>>>>
>>>>> diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
>>>>> index 91953da..707ee17 100644
>>>>> --- a/drivers/target/target_core_transport.c
>>>>> +++ b/drivers/target/target_core_transport.c
>>>>> @@ -2648,6 +2648,36 @@ transport_send_check_condition_and_sense(struct se_cmd *cmd,
>>>>>     		buffer[SPC_ASC_KEY_OFFSET] = 0x1d;
>>>>>     		buffer[SPC_ASCQ_KEY_OFFSET] = 0x00;
>>>>>     		break;
>>>>> +	case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED:
>>>>> +		/* CURRENT ERROR */
>>>>> +		buffer[0] = 0x70;
>>>>> +		buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
>>>>> +		/* ILLEGAL REQUEST */
>>>>> +		buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
>>>>> +		/* LOGICAL BLOCK GUARD CHECK FAILED */
>>>>> +		buffer[SPC_ASC_KEY_OFFSET] = 0x10;
>>>>> +		buffer[SPC_ASCQ_KEY_OFFSET] = 0x01;
>> Hey Nic,
>>
>> In my iSER patches I constructed the same sense buffer (call
>> isert_pi_err_sense_buffer) and called isert_put_rsponse. So I should
>> call this routine instead correct?
> Yes, it should be OK to use this for generating CHECK_CONDITION from
> fabric protection failures in isert_completion_rdma_write() code after
> device->unreg_rdma_mem() has been called.
>
> --nab
>

Will do that.
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