linux-kernel - [PATCH RFC 0/5] device mapper atomic write support

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Message-Id: <20250106124119.1318428-1-john.g.garry@oracle.com>
Date: Mon,  6 Jan 2025 12:41:14 +0000
From: John Garry <john.g.garry@...cle.com>
To: axboe@...nel.dk, agk@...hat.com, snitzer@...nel.org, hch@....de
Cc: mpatocka@...hat.com, martin.petersen@...cle.com,
        linux-block@...r.kernel.org, dm-devel@...ts.linux.dev,
        linux-kernel@...r.kernel.org, John Garry <john.g.garry@...cle.com>
Subject: [PATCH RFC 0/5] device mapper atomic write support

This series introduces initial device mapper atomic write support.

Since we already support stacking atomic writes limits, it's quite
straightforward to support.

Only dm-linear is supported for now, but other personalities could
be supported.

Patch #1 is a proper fix, but the rest of the series is RFC - this is
because I have not fully tested and we are close to the end of this
development cycle.

Based on v6.13-rc6

John Garry (5):
  block: Ensure start sector is aligned for stacking atomic writes
  block: Change blk_stack_atomic_writes_limits() unit_min check
  dm-table: Atomic writes support
  dm: Ensure cloned bio is same length for atomic write
  dm-linear: Enable atomic writes

 block/blk-settings.c          |  9 ++++++---
 drivers/md/dm-linear.c        |  3 ++-
 drivers/md/dm-table.c         | 12 ++++++++++++
 drivers/md/dm.c               |  3 +++
 include/linux/blkdev.h        | 21 ++++++++++++---------
 include/linux/device-mapper.h |  3 +++
 6 files changed, 38 insertions(+), 13 deletions(-)

-- 
2.31.1