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cciss: export resettable host attribute

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This attribute, requested by Redhat, allows kexec-tools to know
whether the controller can honor the reset_devices kernel parameter
and actually reset the controller.  For kdump to work properly it
is necessary that the reset_devices parameter be honored.  This
attribute enables kexec-tools to warn the user if they attempt to
designate a non-resettable controller as the dump device.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Stephen M. Cameron
2011-03-11 20:06:09 +01:00
committed by Jens Axboe
parent 03567812d8
commit 957c2ec558
2 changed files with 51 additions and 0 deletions
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12
Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
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@@ -59,3 +59,15 @@ Kernel Version: 2.6.31
Contact: iss_storagedev@hp.com
Description: Displays the usage count (number of opens) of logical drive Y
of controller X.
Where: /sys/bus/pci/devices/<dev>/ccissX/resettable
Date: February 2011
Kernel Version: 2.6.38
Contact: iss_storagedev@hp.com
Description: Value of 1 indicates the controller can honor the reset_devices
kernel parameter. Value of 0 indicates reset_devices cannot be
honored. This is to allow, for example, kexec tools to be able
to warn the user if they designate an unresettable device as
a dump device, as kdump requires resetting the device in order
to work reliably.