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scsi_dh_alua: Add new blacklist flag 'BLIST_SYNC_ALUA'

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Add a new blacklist flag BLIST_SYNC_ALUA to instruct the
alua device handler to use synchronous command submission
for ALUA commands.

Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke
2016-02-19 09:17:12 +01:00
committed by Martin K. Petersen
parent 00642a1bff
commit 851cde9909
5 changed files with 9 additions and 0 deletions
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1
include/scsi/scsi_device.h
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@@ -176,6 +176,7 @@ struct scsi_device {
unsigned no_dif:1; /* T10 PI (DIF) should be disabled */
unsigned broken_fua:1; /* Don't set FUA bit */
unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */
unsigned synchronous_alua:1; /* Synchronous ALUA commands */
atomic_t disk_events_disable_depth; /* disable depth for disk events */

1
include/scsi/scsi_devinfo.h
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@@ -37,5 +37,6 @@
#define BLIST_TRY_VPD_PAGES 0x10000000 /* Attempt to read VPD pages */
#define BLIST_NO_RSOC 0x20000000 /* don't try to issue RSOC */
#define BLIST_MAX_1024 0x40000000 /* maximum 1024 sector cdb length */
#define BLIST_SYNC_ALUA 0x80000000 /* Synchronous ALUA commands */
#endif