[git pull] device mapper changes for 3.14

From: Mike Snitzer
Date: Wed Jan 22 2014 - 19:36:56 EST

The following changes since commit 319e2e3f63c348a9b66db4667efa73178e18b17d:

Linux 3.13-rc4 (2013-12-15 12:31:33 -0800)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git tags/dm-3.14-changes

for you to fetch changes up to 5066a4df1f427faac8372d20494483bb09a4a1cd:

dm log userspace: allow mark requests to piggyback on flush requests (2014-01-21 23:46:27 -0500)

A set of device-mapper changes for 3.14.

A lot of attention was paid to improving the thin-provisioning target's
handling of metadata operation failures and running out of space. A new
'error_if_no_space' feature was added to allow users to error IOs rather
than queue them when either the data or metadata space is exhausted.

Additional fixes/features include:
- a few fixes to properly support thin metadata device resizing
- a solution for reliably waiting for a DM device's embedded kobject to
be released before destroying the device
- old dm-snapshot is updated to use the dm-bufio interface to take
advantage of readahead capabilities that improve snapshot activation
- new dm-cache target tunables to control how quickly data is promoted
to the cache (fast) device
- improved write efficiency of cluster mirror target by combining
userspace flush and mark requests

Chuansheng Liu (1):
dm snapshot: call destroy_work_on_stack() to pair with INIT_WORK_ONSTACK()

Dongmao Zhang (1):
dm log userspace: allow mark requests to piggyback on flush requests

Joe Thornber (9):
dm thin: fix discard support to a previously shared block
dm thin: return error from alloc_data_block if pool is not in write mode
dm thin: factor out check_low_water_mark and use bools
dm thin: handle metadata failures more consistently
dm cache policy mq: introduce three promotion threshold tunables
dm space map common: make sure new space is used during extend
dm space map metadata: fix extending the space map
dm btree: add dm_btree_find_lowest_key
dm space map metadata: fix bug in resizing of thin metadata

Mike Snitzer (14):
dm thin: initialize dm_thin_new_mapping returned by get_next_mapping
dm space map metadata: limit errors in sm_metadata_new_block
dm persistent data: cleanup dm-thin specific references in text
dm thin: use bool rather than unsigned for flags in structures
dm thin: add mappings to end of prepared_* lists
dm thin: log info when growing the data or metadata device
dm thin: cleanup and improve no space handling
dm thin: requeue bios to DM core if no_free_space and in read-only mode
dm thin: add error_if_no_space feature
dm thin: eliminate the no_free_space flag
dm thin: fix set_pool_mode exposed pool operation races
dm cache: add block sizes and total cache blocks to status output
dm thin: fix pool feature parsing
dm cache: add policy name to status output

Mikulas Patocka (9):
dm table: remove unused buggy code that extends the targets array
dm delay: use per-bio data instead of a mempool and slab cache
dm: remove pointless kobject comparison in dm_get_from_kobject
dm: wait until embedded kobject is released before destroying a device
dm snapshot: use GFP_KERNEL when initializing exceptions
dm snapshot: prepare for switch to using dm-bufio
dm snapshot: use dm-bufio
dm snapshot: use dm-bufio prefetch
dm sysfs: fix a module unload race

Wei Yongjun (1):
dm cache policy mq: use list_del_init instead of list_del + INIT_LIST_HEAD

Documentation/device-mapper/cache-policies.txt | 16 +-
Documentation/device-mapper/cache.txt | 51 ++--
Documentation/device-mapper/thin-provisioning.txt | 7 +
drivers/md/Kconfig | 11 +-
drivers/md/Makefile | 1 +
drivers/md/dm-bufio.c | 36 ++-
drivers/md/dm-bufio.h | 12 +
drivers/md/dm-builtin.c | 48 ++++
drivers/md/dm-cache-policy-mq.c | 70 +++--
drivers/md/dm-cache-policy.c | 4 +
drivers/md/dm-cache-policy.h | 6 +
drivers/md/dm-cache-target.c | 20 +-
drivers/md/dm-delay.c | 35 +--
drivers/md/dm-log-userspace-base.c | 206 +++++++++++----
drivers/md/dm-snap-persistent.c | 87 +++++--
drivers/md/dm-snap.c | 10 +-
drivers/md/dm-sysfs.c | 5 +-
drivers/md/dm-table.c | 22 +-
drivers/md/dm-thin-metadata.c | 20 ++
drivers/md/dm-thin-metadata.h | 4 +-
drivers/md/dm-thin.c | 284 +++++++++++++--------
drivers/md/dm.c | 15 +-
drivers/md/dm.h | 17 ++
drivers/md/persistent-data/dm-block-manager.c | 2 +-
drivers/md/persistent-data/dm-btree.c | 33 ++-
drivers/md/persistent-data/dm-btree.h | 8 +
drivers/md/persistent-data/dm-space-map-common.c | 6 +-
drivers/md/persistent-data/dm-space-map-metadata.c | 32 ++-
include/uapi/linux/dm-log-userspace.h | 20 +-
29 files changed, 767 insertions(+), 321 deletions(-)
create mode 100644 drivers/md/dm-builtin.c
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