From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> This patch updates spc_modesense_control() to set the Application Tag Owner (ATO) bit when when DIF emulation is enabled by the backend device. Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Cc: Hannes Reinecke <hare@xxxxxxx> Cc: Sagi Grimberg <sagig@xxxxxxxxxxxx> Cc: Or Gerlitz <ogerlitz@xxxxxxxxxxxx> Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> --- drivers/target/target_core_spc.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index d99eb95..4360c80 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -799,6 +799,19 @@ 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; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
