Add a new blacklist flag BLIST_SYNC_ALUA to instruct the
alua device handler to use synchronous command submission
for ALUA commands.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/scsi/device_handler/scsi_dh_alua.c | 7 +++++++
include/scsi/scsi_devinfo.h | 1 +
2 files changed, 8 insertions(+)
diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index 36c515c..f0687ba 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -27,6 +27,7 @@
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_dh.h>
+#include <scsi/scsi_devinfo.h>
#define ALUA_DH_NAME "alua"
#define ALUA_DH_VER "1.3"
@@ -335,6 +336,10 @@ static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h,
int rel_port = -1, group_id;
struct alua_port_group *pg, *old_pg = NULL;
bool pg_updated = false;
+ unsigned int bflags = scsi_get_device_flags_keyed(sdev,
+ &sdev->inquiry[8],
+ &sdev->inquiry[16],
+ SCSI_DEVINFO_GLOBAL);
group_id = scsi_vpd_tpg_id(sdev, &rel_port);
if (group_id < 0) {
@@ -373,6 +378,8 @@ static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h,
rcu_assign_pointer(h->pg, pg);
pg_updated = true;
}
+ if (bflags & BLIST_SYNC_ALUA)
+ pg->flags |= ALUA_SYNC_STPG;
alua_rtpg_queue(h->pg, sdev, NULL);
spin_unlock(&h->pg_lock);
diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h
index aca3c80..dc0cb5f 100644
--- a/include/scsi/scsi_devinfo.h
+++ b/include/scsi/scsi_devinfo.h
@@ -37,6 +37,7 @@
#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 */
/* list of keys for the lists */
enum {
--
1.8.5.6
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