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target/spc: Expose ATO bit in control mode page

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This patch updates spc_modesense_control() to set the Application
Tag Owner (ATO) bit when when DIF emulation is enabled by the
backend device.

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2013-12-23 21:23:34 +00:00
parent 56dac14cd2
commit 0c30f421a7
1 changed files with 13 additions and 0 deletions
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13
drivers/target/target_core_spc.c
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@ -858,6 +858,19 @@ static int spc_modesense_control(struct se_device *dev, u8 pc, u8 *p)
* status (see SAM-4).
*/
p[5] = (dev->dev_attrib.emulate_tas) ? 0x40 : 0x00;
/*
* From spc4r30, section 7.5.7 Control mode page
*
* Application Tag Owner (ATO) bit set to one.
*
* If the ATO bit is set to one the device server shall not modify the
* LOGICAL BLOCK APPLICATION TAG field and, depending on the protection
* type, shall not modify the contents of the LOGICAL BLOCK REFERENCE
* TAG field.
*/
if (dev->dev_attrib.pi_prot_type)
p[5] |= 0x80;
p[8] = 0xff;
p[9] = 0xff;
p[11] = 30;