linux-ext4 - [PATCH v8 0/5] Introduce provisioning primitives

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Date:   Fri,  6 Oct 2023 18:28:12 -0700
From:   Sarthak Kukreti <sarthakkukreti@...omium.org>
To:     dm-devel@...hat.com, linux-block@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>, Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...nel.org>,
        Christoph Hellwig <hch@...radead.org>,
        Brian Foster <bfoster@...hat.com>,
        Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Bart Van Assche <bvanassche@...gle.com>,
        "Darrick J. Wong" <djwong@...nel.org>,
        Dave Chinner <david@...morbit.com>,
        Sarthak Kukreti <sarthakkukreti@...omium.org>
Subject: [PATCH v8 0/5] Introduce provisioning primitives

Hi,

This patch series is version 8 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 v7[2].

This patch series is rebased from the linux-dm/dm-6.5-provision-support [1] on to
(cac405a3bfa2 Merge tag 'for-6.6-rc3-tag'). In addition, there's an
additional patch to allow passing through an unshare intent via REQ_OP_PROVISION
(suggested by Darrick in [4]).

[1] Original: https://lore.kernel.org/lkml/20220915164826.1396245-1-sarthakkukreti@google.com/
[2] v7 (last series): https://lore.kernel.org/linux-fsdevel/20230518223326.18744-1-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/linux-fsdevel/20230522163710.GA11607@frogsfrogsfrogs/

Changes from v7:
- Drop dm-thinpool (will be independently developed with snapshot
  support) and dm-snapshot (will not be supported) from the series.
- (By snitzer@...nel.org) Fixes for block device provision limits.
- (Suggested by djwong@...nel.org) Add mechanism to pass unshare intent
  via REQ_OP_PROVISION

Sarthak Kukreti (5):
  block: Don't invalidate pagecache for invalid falloc modes
  block: Introduce provisioning primitives
  loop: Add support for provision requests
  dm: Add block provisioning support
  block: Pass unshare intent via REQ_OP_PROVISION

 block/blk-core.c              |  5 +++
 block/blk-lib.c               | 55 ++++++++++++++++++++++++++++++++
 block/blk-merge.c             | 18 +++++++++++
 block/blk-settings.c          | 19 +++++++++++
 block/blk-sysfs.c             |  9 ++++++
 block/bounce.c                |  1 +
 block/fops.c                  | 33 ++++++++++++++++----
 drivers/block/loop.c          | 59 ++++++++++++++++++++++++++++++++---
 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     |  8 ++++-
 include/linux/blkdev.h        | 17 ++++++++++
 include/linux/device-mapper.h | 17 ++++++++++
 16 files changed, 268 insertions(+), 14 deletions(-)

-- 
2.42.0.609.gbb76f46606-goog