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

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Date:	Tue, 14 Jan 2014 09:44:28 +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 1/10/2014 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?
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