[git pull] device-mapper patches for 2.6.33-rc1

[Alasdair G Kergon <agk@redhat.com>]

Please pull from:

  master.kernel.org:/pub/scm/linux/kernel/git/agk/linux-2.6-dm.git master

to get device-mapper fixes and enhancements for inclusion in 2.6.33-rc1.

The main new feature is support for merging the changes held in a
snapshot back into the original device.  Barriers are now supported
by all the types of dm devices.

Alasdair G Kergon (3):
      dm: rename dm_get_table to dm_get_live_table
      dm: bind new table before destroying old
      dm: keep old table until after resume succeeded

Jon Brassow (5):
      dm snapshot: avoid else clause in persistent_read_metadata
      dm snapshot: consolidate insert exception functions
      dm snapshot: rename dm_snap_exception to dm_exception
      dm snapshot: rename exception_table to dm_exception_table
      dm snapshot: rename exception functions

Julia Lawall (1):
      dm exception store: free tmp_store on persistent flag error

Jun'ichi Nomura (1):
      dm: trace request based remapping

Kiyoshi Ueda (14):
      dm: abstract dm_in_flight function
      dm: use clone in map_request function
      dm: pass gfp_mask to alloc_rq_tio
      dm: abstract clone_rq
      dm: simplify request based suspend
      dm: use md pending for in flight IO counting
      dm: refactor request based completion functions
      dm: move dm_end_request
      dm: add request based barrier support
      dm mpath: flush workqueues before suspend completes
      dm: swap target postsuspend call and setting suspended flag
      dm: rename dm_suspended to dm_suspended_md
      dm: export suspended state to targets
      dm mpath: reject messages when device is suspended

Mike Anderson (4):
      dm: add dm_deleting_md function
      dm ioctl: forbid messages to devices being deleted
      dm mpath: add mutex to synchronize adding and flushing work
      dm mpath: prevent io from work queue while suspended

Mike Snitzer (9):
      dm snapshot: add allocated metadata to snapshot status
      dm snapshot: move cow ref from exception store to snap core
      dm snapshot: track suspended state in target
      dm ioctl: retrieve status from inactive table
      dm snapshot: allow live exception store handover between tables
      dm snapshot: create function for chunk_is_tracked wait
      dm snapshot: support barriers in snapshot merge target
      dm snapshot: merge consecutive chunks together
      dm snapshot: report merge failure in status

Mikulas Patocka (35):
      dm: avoid _hash_lock deadlock
      dm snapshot: only take lock for statustype info not table
      dm snapshot: cope with chunk size larger than origin
      dm io: use slab for struct io
      dm io: remove extra bi_io_vec region hack
      dm raid1: support flush
      dm raid1: split touched state into two
      dm log: add flush_header function
      dm log: introduce flush_failed variable
      dm log: add flush callback fn
      dm log: use flush callback fn
      dm raid1: implement mirror_flush
      dm raid1: report flush errors separately in status
      dm raid1: add framework to hold bios during suspend
      dm raid1: use hold framework in do_failures
      dm raid1: abstract get_valid_mirror function
      dm raid1: remove bio_endio from dm_rh_mark_nosync
      dm raid1: hold write bios when errors are handled
      dm raid1: hold all write bios when leg fails
      dm raid1: explicitly initialise bio_lists
      dm snapshot: simplify sector_to_chunk expression
      dm snapshot: abstract minimum_chunk_size fn
      dm kcopyd: accept zero size jobs
      dm io: handle empty barriers
      dm snapshot: make bio optional in __origin_write
      dm exception store: add merge specific methods
      dm snapshot: add merge target
      dm snapshot: rework writing to origin
      dm snapshot: avoid allocating exceptions in merge
      dm snapshot: permit only one merge at once
      dm snapshot: add merging
      dm snapshot: queue writes to chunks being merged
      dm snapshot: delay merging a chunk until writes to it complete
      dm snapshot: trigger exceptions in remaining snapshots during merge
      dm snapshot: use merge origin if snapshot invalid

Milan Broz (7):
      dm: sysfs add empty release function to avoid debug warning
      dm crypt: make wipe message also wipe tfm key
      dm crypt: move private iv fields to structs
      dm crypt: restructure essiv error path
      dm crypt: separate essiv allocation from initialisation
      dm crypt: make wipe message also wipe essiv key
      dm crypt: add plain64 iv

Roel Kluin (1):
      dm ioctl: prefer strlcpy over strncpy

 Documentation/device-mapper/snapshot.txt |   60 ++-
 drivers/md/dm-crypt.c                    |  207 ++++--
 drivers/md/dm-exception-store.c          |   33 +-
 drivers/md/dm-exception-store.h          |   62 ++-
 drivers/md/dm-io.c                       |  120 ++-
 drivers/md/dm-ioctl.c                    |  123 +++-
 drivers/md/dm-kcopyd.c                   |    5 +-
 drivers/md/dm-log.c                      |   77 ++-
 drivers/md/dm-mpath.c                    |   95 ++-
 drivers/md/dm-raid1.c                    |  219 ++++--
 drivers/md/dm-region-hash.c              |   31 +-
 drivers/md/dm-snap-persistent.c          |  195 ++++-
 drivers/md/dm-snap-transient.c           |   24 +-
 drivers/md/dm-snap.c                     | 1279 ++++++++++++++++++++++++------
 drivers/md/dm-sysfs.c                    |   10 +-
 drivers/md/dm-table.c                    |    3 +
 drivers/md/dm-uevent.c                   |    9 +-
 drivers/md/dm.c                          |  643 +++++++++-------
 drivers/md/dm.h                          |   13 +
 include/linux/device-mapper.h            |    8 +-
 include/linux/dm-dirty-log.h             |    6 +-
 include/linux/dm-ioctl.h                 |   13 +-
 include/linux/dm-region-hash.h           |    3 +-
 23 files changed, 2349 insertions(+), 889 deletions(-)

Alasdair.