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scsi_dh_alua: Add new blacklist flag 'BLIST_SYNC_ALUA' 

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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2
drivers/scsi/device_handler/scsi_dh_alua.c
View File

@ -366,6 +366,8 @@ static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h,
/* port group has changed. Update to new port group */
rcu_assign_pointer(h->pg, pg);
}
if (sdev->synchronous_alua)
pg->flags |= ALUA_SYNC_STPG;
alua_rtpg_queue(h->pg, sdev, NULL);
spin_unlock(&h->pg_lock);

2
drivers/scsi/scsi_devinfo.c
View File

@ -220,6 +220,8 @@ static struct {
{"NAKAMICH", "MJ-5.16S", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"NEC", "PD-1 ODX654P", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"NEC", "iStorage", NULL, BLIST_REPORTLUN2},
{"NETAPP", "LUN C-Mode", NULL, BLIST_SYNC_ALUA},
{"NETAPP", "INF-01-00", NULL, BLIST_SYNC_ALUA},
{"NRC", "MBR-7", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"NRC", "MBR-7.4", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"PIONEER", "CD-ROM DRM-600", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},

3
drivers/scsi/scsi_scan.c
View File

@ -964,6 +964,9 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
if (*bflags & BLIST_NO_DIF)
sdev->no_dif = 1;
if (*bflags & BLIST_SYNC_ALUA)
sdev->synchronous_alua = 1;
sdev->eh_timeout = SCSI_DEFAULT_EH_TIMEOUT;
if (*bflags & BLIST_TRY_VPD_PAGES)

1
include/scsi/scsi_device.h
View File

@ -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
View File

@ -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