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authorNicholas Bellinger <nab@linux-iscsi.org>2013-12-23 21:23:34 +0000
committerNicholas Bellinger <nab@linux-iscsi.org>2014-01-18 09:53:14 +0000
commit0c30f421a7dba0a7ca9a3f67dad15d84d4d61e01 (patch)
treefa5aad7ae66f5be460f18352de357d5c6c8bfff0 /drivers/target
parent56dac14cd25259fc567c5c4726a8f30f0ea407ce (diff)
target/spc: Expose ATO bit in control mode page
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>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_spc.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index 73fdff58d88d..43c5ca9878bc 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -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;