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scsi: Add ALUA state change UA handling 

Log the ALUA state change unit attention correctly with
the message log and emit an event to allow user-space
tools to react to it.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Hannes Reinecke 2015-07-06 13:41:53 +02:00 committed by James Bottomley
parent e819cdb198
commit 14c3e677df
3 changed files with 10 additions and 1 deletions
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4
drivers/scsi/scsi_error.c
View File

@ -421,6 +421,10 @@ static void scsi_report_sense(struct scsi_device *sdev,
evt_type = SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED;
sdev_printk(KERN_WARNING, sdev,
"Mode parameters changed");
} else if (sshdr->asc == 0x2a && sshdr->ascq == 0x06) {
evt_type = SDEV_EVT_ALUA_STATE_CHANGE_REPORTED;
sdev_printk(KERN_WARNING, sdev,
"Asymmetric access state changed");
} else if (sshdr->asc == 0x2a && sshdr->ascq == 0x09) {
evt_type = SDEV_EVT_CAPACITY_CHANGE_REPORTED;
sdev_printk(KERN_WARNING, sdev,

4
drivers/scsi/scsi_lib.c
View File

@ -2712,6 +2712,9 @@ static void scsi_evt_emit(struct scsi_device *sdev, struct scsi_event *evt)
case SDEV_EVT_LUN_CHANGE_REPORTED:
envp[idx++] = "SDEV_UA=REPORTED_LUNS_DATA_HAS_CHANGED";
break;
case SDEV_EVT_ALUA_STATE_CHANGE_REPORTED:
envp[idx++] = "SDEV_UA=ASYMMETRIC_ACCESS_STATE_CHANGED";
break;
default:
/* do nothing */
break;
@ -2815,6 +2818,7 @@ struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type,
case SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED:
case SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED:
case SDEV_EVT_LUN_CHANGE_REPORTED:
case SDEV_EVT_ALUA_STATE_CHANGE_REPORTED:
default:
/* do nothing */
break;

3
include/scsi/scsi_device.h
View File

@ -57,9 +57,10 @@ enum scsi_device_event {
SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED, /* 38 07 UA reported */
SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED, /* 2A 01 UA reported */
SDEV_EVT_LUN_CHANGE_REPORTED, /* 3F 0E UA reported */
SDEV_EVT_ALUA_STATE_CHANGE_REPORTED, /* 2A 06 UA reported */
SDEV_EVT_FIRST = SDEV_EVT_MEDIA_CHANGE,
SDEV_EVT_LAST = SDEV_EVT_LUN_CHANGE_REPORTED,
SDEV_EVT_LAST = SDEV_EVT_ALUA_STATE_CHANGE_REPORTED,
SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1
};