[Bug 196493] New: When LUN assignments on the target was changed, event must be triggered

[Bug 196493] New: When LUN assignments on the target was changed, event must be triggered

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=196493

            Bug ID: 196493
           Summary: When LUN assignments on the target was changed, event
                    must be triggered
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 3.13…4.4 and probably all other
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: SCSI
          Assignee: linux-scsi@vger.kernel.org
          Reporter: ds@vo-ix.ru
        Regression: No

1. The (e.g. SAN) device is unmapped and then the same LUN is reused by other
WWN, but no actions taken on linux-side.
2. Kernel receives indication and claims "Kernel: [15671249.097583] sd
8:0:15:9: Warning! Received an indication that the LUN assignments on this
target have changed. The Linux SCSI layer does not automatically remap LUN
assignments."
3. Observe no further actions at kernel-side. ioctl (requested via blockdev)
returns parameters of unmapped LUN.

Expect at least to cock the trigger on respective device (like mapped to sysfs
"/sys/block/sd*/device/evt_lun_change_reported") and thus provide the mechanism
to inform device mapper. In perspective, the feature of auto-invalidation and
rescan on changed path.

-- 
You are receiving this mail because:
You are the assignee for the bug.