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dm: document sysfs entries 

Describe attributes provided by device-mapper in /sys/block.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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Milan Broz 2012-03-28 18:41:23 +01:00 committed by Alasdair G Kergon
parent b0988900ba
commit 1d330ec6f9
1 changed files with 25 additions and 0 deletions
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What: /sys/block/dm-<num>/dm/name
Date: January 2009
KernelVersion: 2.6.29
Contact: dm-devel@redhat.com
Description: Device-mapper device name.
Read-only string containing mapped device name.
Users: util-linux, device-mapper udev rules
What: /sys/block/dm-<num>/dm/uuid
Date: January 2009
KernelVersion: 2.6.29
Contact: dm-devel@redhat.com
Description: Device-mapper device UUID.
Read-only string containing DM-UUID or empty string
if DM-UUID is not set.
Users: util-linux, device-mapper udev rules
What: /sys/block/dm-<num>/dm/suspended
Date: June 2009
KernelVersion: 2.6.31
Contact: dm-devel@redhat.com
Description: Device-mapper device suspend state.
Contains the value 1 while the device is suspended.
Otherwise it contains 0. Read-only attribute.
Users: util-linux, device-mapper udev rules