[dm-devel] [PATCH 0/3] fix direct io errors on dm-crypt

[Keith Busch]

From: Keith Busch <kbusch at kernel.org>

The 6.0 kernel made some changes to the direct io interface to allow
offsets in user addresses. This based on the hardware's capabilities
reported in the request_queue's dma_alignment attribute.

dm-crypt requires direct io be aligned to the block size. Since it was
only ever using the default 511 dma mask, this requirement may fail if
formatted to something larger, like 4k, which will result in unexpected
behavior with direct-io.

There are two parts to fixing this:

  First, the attribute needs to be moved to the queue_limit so that it
  can properly stack with device mappers.

  Second, dm-crypt provides its minimum required limit to match the
  logical block size.

Keith Busch (3):
  block: make dma_alignment a stacking queue_limit
  dm-crypt: provide dma_alignment limit in io_hints
  block: make blk_set_default_limits() private

 block/blk-core.c       |  1 -
 block/blk-settings.c   |  9 +++++----
 block/blk.h            |  1 +
 drivers/md/dm-crypt.c  |  1 +
 include/linux/blkdev.h | 16 ++++++++--------
 5 files changed, 15 insertions(+), 13 deletions(-)

-- 
2.30.2