Merge tag 'for-4.13/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull device mapper updates from Mike Snitzer:

 - Add the ability to use select or poll /dev/mapper/control to wait for
   events from multiple DM devices.

 - Convert DM's printk macros over to using pr_<level> macros.

 - Add a big-endian variant of plain64 IV to dm-crypt.

 - Add support for zoned (aka SMR) devices to DM core. DM kcopyd was
   also improved to provide a sequential write feature needed by zoned
   devices.

 - Introduce DM zoned target that provides support for host-managed
   zoned devices, the result dm-zoned device acts as a drive-managed
   interface to the underlying host-managed device.

 - A DM raid fix to avoid using BUG() for error handling.

* tag 'for-4.13/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm zoned: fix overflow when converting zone ID to sectors
  dm raid: stop using BUG() in __rdev_sectors()
  dm zoned: drive-managed zoned block device target
  dm kcopyd: add sequential write feature
  dm linear: add support for zoned block devices
  dm flakey: add support for zoned block devices
  dm: introduce dm_remap_zone_report()
  dm: fix REQ_OP_ZONE_REPORT bio handling
  dm: fix REQ_OP_ZONE_RESET bio handling
  dm table: add zoned block devices validation
  dm: convert DM printk macros to pr_<level> macros
  dm crypt: add big-endian variant of plain64 IV
  dm bio prison: use rb_entry() rather than container_of()
  dm ioctl: report event number in DM_LIST_DEVICES
  dm ioctl: add a new DM_DEV_ARM_POLL ioctl
  dm: add basic support for using the select or poll function

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 906103c168ea..4a249ee86364 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -521,6 +521,23 @@ config DM_INTEGRITY
 	  To compile this code as a module, choose M here: the module will
 	  be called dm-integrity.
 
+config DM_ZONED
+	tristate "Drive-managed zoned block device target support"
+	depends on BLK_DEV_DM
+	depends on BLK_DEV_ZONED
+	---help---
+	  This device-mapper target takes a host-managed or host-aware zoned
+	  block device and exposes most of its capacity as a regular block
+	  device (drive-managed zoned block device) without any write
+	  constraints. This is mainly intended for use with file systems that
+	  do not natively support zoned block devices but still want to
+	  benefit from the increased capacity offered by SMR disks. Other uses
+	  by applications using raw block devices (for example object stores)
+	  are also possible.
+
+	  To compile this code as a module, choose M here: the module will
+	  be called dm-zoned.
+
 	  If unsure, say N.
 
 endif # MD