scsi_debug: Add REPORTED LUNS DATA HAS CHANGED Unit Attention

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Generate a REPORTED LUNS DATA HAS CHANGED Unit Attention if
sysfs "max_luns" is used to change the number of scsi_debug LUNs.
This is only done if scsi_debug_scsi_level is SPC-3 or above.
Additionally, implement SPC-4 behavior which only generates
this Unit Attention on the first LUN on the target to receive
a command after the change.  This condition is cleared when
a REPORT LUNS command is received.

Signed-off-by: Ewan D. Milne <emilne@redhat.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Tested-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Ewan D. Milne 2014-12-04 11:49:27 -05:00 • committed by Christoph Hellwig

parent 08024885a2

commit 19c8ead725

1 changed files with 55 additions and 1 deletions

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drivers/scsi/scsi_debug.c

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