tree 4a577f6a1932923bfbcb8592f4a4f2a7935616dd
parent 765cbc6dad16b87724803e359d6be792ddf08614
author Hannes Reinecke <hare@suse.de> 1216338777 -0700
committer James Bottomley <James.Bottomley@HansenPartnership.com> 1217099691 -0400

[SCSI] scsi_dh: Add 'dh_state' sysfs attribute

Implement a 'dh_state' sdev attribute for dynamic device handler
manipulation. A read on the attribute will return the name of
the currently attached device handler or 'detached' if no handler
is attached.
The attribute allows the following strings to be written:
- The name of the device handler to be attached if the state is
  'detached'.
- 'activate' to trigger path activation if a device handler
  is attached.
- 'detach' to detach the currently attached device handler.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>