[dm-devel] [PATCH] multipathd: check and cleanup zombie paths

Xose Vazquez Perez xose.vazquez at gmail.com
Tue Mar 20 15:12:17 UTC 2018


On 03/20/2018 03:58 PM, Bart Van Assche wrote:

> It is on purpose that the SCSI core does not remove stale SCSI device nodes.
> If you want that these stale SCSI device nodes get removed automatically,
> two possible approaches are (there might be other approaches):
> * Write a new user space daemon that periodically checks for stale devices
>   (e.g. by running grep -aH . /sys/class/scsi_device/*/*/state |
>    grep -v running) and that triggers a SCSI rescan if any stale devices are
>   found.
> * Write a udev rule that listens for SDEV_UA=REPORTED_LUNS_DATA_HAS_CHANGED
>   and that triggers a SCSI rescan if this event is triggered by the kernel.

There are some "remove" flags in rescan-scsi-bus.sh:
https://github.com/hreinecke/sg3_utils/blob/d4dbbede04db21c206e4c2acc1cf766117f003c3/scripts/rescan-scsi-bus.sh#L1080

-r      enables removing of devices        [default: disabled]
--forceremove:   Remove stale devices (DANGEROUS)
--forcerescan:   Remove and readd existing devices (DANGEROUS)




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