From: Milan Broz Date: Tue, 6 Jan 2009 03:05:12 +0000 (+0000) Subject: dm: add name and uuid to sysfs X-Git-Tag: v2.6.29-rc1~492^2~5 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=784aae735d9b0bba3f8b9faef4c8b30df3bf0128;p=pandora-kernel.git dm: add name and uuid to sysfs Implement simple read-only sysfs entry for device-mapper block device. This patch adds a simple sysfs directory named "dm" under block device properties and implements - name attribute (string containing mapped device name) - uuid attribute (string containing UUID, or empty string if not set) The kobject is embedded in mapped_device struct, so no additional memory allocation is needed for initializing sysfs entry. During the processing of sysfs attribute we need to lock mapped device which is done by a new function dm_get_from_kobj, which returns the md associated with kobject and increases the usage count. Each 'show attribute' function is responsible for its own locking. Signed-off-by: Milan Broz Signed-off-by: Alasdair G Kergon --- Reading git-diff-tree failed