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author | Milan Broz <mbroz@redhat.com> | 2009-01-06 03:05:12 +0000 |
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committer | Alasdair G Kergon <agk@redhat.com> | 2009-01-06 03:05:12 +0000 |
commit | 784aae735d9b0bba3f8b9faef4c8b30df3bf0128 (patch) | |
tree | 7e2e956c395b27f63569d7a6adc1098f116cc3a4 /sound/core/oss | |
parent | d58168763f74d1edbc296d7038c60efe6493fdd4 (diff) |
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 <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'sound/core/oss')
0 files changed, 0 insertions, 0 deletions