[RFC PATCH 0/4] Low water mark disk events

[Hannes Reinecke <hare@suse.de>]

Hi all,

here is a patchset to implement 'low water mark' disk events.
This event corresponds to a TP Soft Threshold Reached UA for
SCSI or a 'low watermark' event for dm-thin.
It utilises the existing 'disk event' infrastructure from the
blocklayer to send out the events via udev.
And it also cleans up the ambiguous MEDIA_CHANGE event handling
from libata, where AN (asynchronous notification) events would
be signalled via SCSI events, and polled MEDIA_CHANGE events
would be signalled via disk events.
And I've added thin provisioning support to brd, too, to have
a simple testbed for the new low water mark disk event.

As usual, comments and reviews are welcome.

Hannes Reinecke (4):
  scsi,block: enable disk event forwarding
  block,scsi: Low water mark disk event
  dm-thin: enable low water mark disk event
  brd: thin provisioning support

 block/genhd.c              |  3 +++
 drivers/block/brd.c        | 53 ++++++++++++++++++++++++++++++++++++++++++++++
 drivers/md/dm-thin.c       |  2 ++
 drivers/md/dm.c            | 26 +++++++++++++++++++++++
 drivers/md/dm.h            |  3 ++-
 drivers/scsi/scsi_lib.c    | 25 +++++++++-------------
 drivers/scsi/sd.c          | 44 ++++++++++++++++++++++++++++++++++++++
 drivers/scsi/sd.h          |  1 +
 include/linux/genhd.h      |  1 +
 include/scsi/scsi_driver.h |  2 ++
 10 files changed, 144 insertions(+), 16 deletions(-)

-- 
1.8.5.6