}
#endif
+ /**
+ * scsi_report_lun_change - Set flag on all *other* devices on the same target
+ * to indicate that a UNIT ATTENTION is expected.
+ * @sdev: Device reporting the UNIT ATTENTION
+ */
+static void scsi_report_lun_change(struct scsi_device *sdev)
+{
+ sdev->sdev_target->expecting_lun_change = 1;
+}
+
+/**
+ * scsi_report_sense - Examine scsi sense information and log messages for
+ * certain conditions, also issue uevents for some of them.
+ * @sdev: Device reporting the sense code
+ * @sshdr: sshdr to be examined
+ */
+static void scsi_report_sense(struct scsi_device *sdev,
+ struct scsi_sense_hdr *sshdr)
+{
+ enum scsi_device_event evt_type = SDEV_EVT_MAXBITS; /* i.e. none */
+
+ if (sshdr->sense_key == UNIT_ATTENTION) {
+ if (sshdr->asc == 0x3f && sshdr->ascq == 0x03) {
+ evt_type = SDEV_EVT_INQUIRY_CHANGE_REPORTED;
+ sdev_printk(KERN_WARNING, sdev,
+ "Inquiry data has changed");
+ } else if (sshdr->asc == 0x3f && sshdr->ascq == 0x0e) {
+ evt_type = SDEV_EVT_LUN_CHANGE_REPORTED;
+ scsi_report_lun_change(sdev);
+ sdev_printk(KERN_WARNING, sdev,
+ "Warning! Received an indication that the "
+ "LUN assignments on this target have "
+ "changed. The Linux SCSI layer does not "
+ "automatically remap LUN assignments.\n");
+ } else if (sshdr->asc == 0x3f)
+ sdev_printk(KERN_WARNING, sdev,
+ "Warning! Received an indication that the "
+ "operating parameters on this target have "
+ "changed. The Linux SCSI layer does not "
+ "automatically adjust these parameters.\n");
+
+ if (sshdr->asc == 0x38 && sshdr->ascq == 0x07) {
+ evt_type = SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED;
+ sdev_printk(KERN_WARNING, sdev,
+ "Warning! Received an indication that the "
+ "LUN reached a thin provisioning soft "
+ "threshold.\n");
+ }
+
+ if (sshdr->asc == 0x2a && sshdr->ascq == 0x01) {
+ evt_type = SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED;
+ sdev_printk(KERN_WARNING, sdev,
+ "Mode parameters changed");
+ } else if (sshdr->asc == 0x2a && sshdr->ascq == 0x09) {
+ evt_type = SDEV_EVT_CAPACITY_CHANGE_REPORTED;
+ sdev_printk(KERN_WARNING, sdev,
+ "Capacity data has changed");
+ } else if (sshdr->asc == 0x2a)
+ sdev_printk(KERN_WARNING, sdev,
+ "Parameters changed");
+ }
+
+ if (evt_type != SDEV_EVT_MAXBITS) {
+ set_bit(evt_type, sdev->pending_events);
+ schedule_work(&sdev->event_work);
+ }
+}
+
/**
* scsi_check_sense - Examine scsi cmd sense
* @scmd: Cmd to have sense checked.
*/
return SUCCESS;
+ scsi_report_sense(sdev, &sshdr);
+
if (scsi_sense_is_deferred(&sshdr))
return NEEDS_RETRY;
}
}
/*
+ * we might also expect a cc/ua if another LUN on the target
+ * reported a UA with an ASC/ASCQ of 3F 0E -
+ * REPORTED LUNS DATA HAS CHANGED.
+ */
+ if (scmd->device->sdev_target->expecting_lun_change &&
+ sshdr.asc == 0x3f && sshdr.ascq == 0x0e)
+ return NEEDS_RETRY;
+ /*
* if the device is in the process of becoming ready, we
* should retry.
*/
if (scmd->device->allow_restart &&
(sshdr.asc == 0x04) && (sshdr.ascq == 0x02))
return FAILED;
-
- if (sshdr.asc == 0x3f && sshdr.ascq == 0x0e)
- scmd_printk(KERN_WARNING, scmd,
- "Warning! Received an indication that the "
- "LUN assignments on this target have "
- "changed. The Linux SCSI layer does not "
- "automatically remap LUN assignments.\n");
- else if (sshdr.asc == 0x3f)
- scmd_printk(KERN_WARNING, scmd,
- "Warning! Received an indication that the "
- "operating parameters on this target have "
- "changed. The Linux SCSI layer does not "
- "automatically adjust these parameters.\n");
-
- if (sshdr.asc == 0x38 && sshdr.ascq == 0x07)
- scmd_printk(KERN_WARNING, scmd,
- "Warning! Received an indication that the "
- "LUN reached a thin provisioning soft "
- "threshold.\n");
-
/*
* Pass the UA upwards for a determination in the completion
* functions.
*/
return ADD_TO_MLQUEUE;
case GOOD:
+ if (scmd->cmnd[0] == REPORT_LUNS)
+ scmd->device->sdev_target->expecting_lun_change = 0;
scsi_handle_queue_ramp_up(scmd->device);
case COMMAND_TERMINATED:
return SUCCESS;
case SDEV_EVT_MEDIA_CHANGE:
envp[idx++] = "SDEV_MEDIA_CHANGE=1";
break;
-
+ case SDEV_EVT_INQUIRY_CHANGE_REPORTED:
+ envp[idx++] = "SDEV_UA=INQUIRY_DATA_HAS_CHANGED";
+ break;
+ case SDEV_EVT_CAPACITY_CHANGE_REPORTED:
+ envp[idx++] = "SDEV_UA=CAPACITY_DATA_HAS_CHANGED";
+ break;
+ case SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED:
+ envp[idx++] = "SDEV_UA=THIN_PROVISIONING_SOFT_THRESHOLD_REACHED";
+ break;
+ case SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED:
+ envp[idx++] = "SDEV_UA=MODE_PARAMETERS_CHANGED";
+ break;
+ case SDEV_EVT_LUN_CHANGE_REPORTED:
+ envp[idx++] = "SDEV_UA=REPORTED_LUNS_DATA_HAS_CHANGED";
+ break;
default:
/* do nothing */
break;
void scsi_evt_thread(struct work_struct *work)
{
struct scsi_device *sdev;
+ enum scsi_device_event evt_type;
LIST_HEAD(event_list);
sdev = container_of(work, struct scsi_device, event_work);
+ for (evt_type = SDEV_EVT_FIRST; evt_type <= SDEV_EVT_LAST; evt_type++)
+ if (test_and_clear_bit(evt_type, sdev->pending_events))
+ sdev_evt_send_simple(sdev, evt_type, GFP_KERNEL);
+
while (1) {
struct scsi_event *evt;
struct list_head *this, *tmp;
/* evt_type-specific initialization, if any */
switch (evt_type) {
case SDEV_EVT_MEDIA_CHANGE:
+ case SDEV_EVT_INQUIRY_CHANGE_REPORTED:
+ case SDEV_EVT_CAPACITY_CHANGE_REPORTED:
+ case SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED:
+ case SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED:
+ case SDEV_EVT_LUN_CHANGE_REPORTED:
default:
/* do nothing */
break;
#define REF_EVT(name) &dev_attr_evt_##name.attr
DECLARE_EVT(media_change, MEDIA_CHANGE)
+DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED)
+DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED)
+DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED)
+DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED)
+DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED)
/* Default template for device attributes. May NOT be modified */
static struct attribute *scsi_sdev_attrs[] = {
&dev_attr_ioerr_cnt.attr,
&dev_attr_modalias.attr,
REF_EVT(media_change),
+ REF_EVT(inquiry_change_reported),
+ REF_EVT(capacity_change_reported),
+ REF_EVT(soft_threshold_reached),
+ REF_EVT(mode_parameter_change_reported),
+ REF_EVT(lun_change_reported),
NULL
};
enum scsi_device_event {
SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */
+ SDEV_EVT_INQUIRY_CHANGE_REPORTED, /* 3F 03 UA reported */
+ SDEV_EVT_CAPACITY_CHANGE_REPORTED, /* 2A 09 UA reported */
+ 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_FIRST = SDEV_EVT_MEDIA_CHANGE,
+ SDEV_EVT_LAST = SDEV_EVT_LUN_CHANGE_REPORTED,
- SDEV_EVT_LAST = SDEV_EVT_MEDIA_CHANGE,
SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1
};
atomic_t disk_events_disable_depth; /* disable depth for disk events */
DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
+ DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */
struct list_head event_list; /* asserted events */
struct work_struct event_work;
* means no lun present. */
unsigned int no_report_luns:1; /* Don't use
* REPORT LUNS for scanning. */
+ unsigned int expecting_lun_change:1; /* A device has reported
+ * a 3F/0E UA, other devices on
+ * the same target will also. */
/* commands actually active on LLD. protected by host lock. */
unsigned int target_busy;
/*
projects / kernel / kernel-generic.git / commitdiff