linux-kernel - [PATCH v9 0/3] [PATCH v9 0/3] Introduce provisioning primitives

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Date:   Thu,  9 Nov 2023 17:01:35 -0800
From:   Sarthak Kukreti <sarthakkukreti@...omium.org>
To:     dm-devel@...ts.linux.dev, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>, Mike Snitzer <snitzer@...nel.org>,
        "Darrick J . Wong" <djwong@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Dave Chinner <david@...morbit.com>,
        Brian Foster <bfoster@...hat.com>,
        Sarthak Kukreti <sarthakkukreti@...omium.org>
Subject: [PATCH v9 0/3] [PATCH v9 0/3] Introduce provisioning primitives

Hi,

This patch series is version 9 of the patch series to introduce
block-level provisioning mechanism (original [1]), which is useful for
provisioning space across thinly provisioned storage architectures (loop
devices backed by sparse files, dm-thin devices, virtio-blk). This
series has minimal changes over v8[2], with a couple of patches dropped
(suggested by Dave).

This patch series is rebased from the linux-dm/dm-6.5-provision-support
[3] on to (a12deb44f973 Merge tag 'input-for-v6.7-rc0' ...). The final 
patch in the series is a blktest (suggested by Dave in 4) which was used
to test out the provisioning flow for loop devices on sparse files on an
ext4 filesystem.

[1] Original: https://lore.kernel.org/lkml/20220915164826.1396245-1-sarthakkukreti@google.com/
[2] v8 (last series): https://lore.kernel.org/lkml/20231007012817.3052558-1-sarthakkukreti@chromium.org/
[3] linux-dm/dm-6.5-provision-suppport tree:
https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git/log/?h=dm-6.5-provision-support
(with the last two WIP patches for dm-thinpool dropped as per discussion with
maintainers).
[4] https://lore.kernel.org/lkml/ZSXono3GkXhgrZ1T@dread.disaster.area/

Changes from v8:
- Dropped fallocate() bugfix: merged separately.
- Dropped patch for unshare intent (suggested by Dave).
- More comments in loop device patch to point out the implementation
  constraint and how it affects filesystems with copy-on-write
  semantics.
- Added blktest "loop/010" (rebased on top of ) for testing.

Sarthak Kukreti (4):
  block: Introduce provisioning primitives
  dm: Add block provisioning support
  loop: Add support for provision requests
  loop/010: Add test for mode 0 fallocate on loop devices

 block/blk-core.c              |  5 ++++
 block/blk-lib.c               | 51 +++++++++++++++++++++++++++++++++++
 block/blk-merge.c             | 18 +++++++++++++
 block/blk-settings.c          | 19 +++++++++++++
 block/blk-sysfs.c             |  9 +++++++
 block/bounce.c                |  1 +
 block/fops.c                  |  5 ++++
 drivers/block/loop.c          | 39 ++++++++++++++++++++++++---
 drivers/md/dm-crypt.c         |  4 ++-
 drivers/md/dm-linear.c        |  1 +
 drivers/md/dm-table.c         | 23 ++++++++++++++++
 drivers/md/dm.c               |  7 +++++
 include/linux/bio.h           |  6 +++--
 include/linux/blk_types.h     |  5 +++-
 include/linux/blkdev.h        | 16 +++++++++++
 include/linux/device-mapper.h | 17 ++++++++++++
 16 files changed, 219 insertions(+), 7 deletions(-)

-- 
2.39.2