move integrity settings to queue_limits v3

[Christoph Hellwig <hch@lst.de>]

Hi Jens, hi Martin,

this series converts the blk-integrity settings to sit in the queue
limits and be updated through the atomic queue limits API.

I've mostly tested this with nvme, scsi is only covered by simple
scsi_debug based tests.

For MD I found an pre-existing error handling bug when combining PI
capable devices with not PI capable devices.  The fix was posted here
(and is included in the git branch below):

   https://lore.kernel.org/linux-raid/20240604172607.3185916-1-hch@lst.de/

For dm-integrity my testing showed that even the baseline fails to create
the luks-based dm-crypto with dm-integrity backing for the authentication
data.  As the failure is non-fatal I've not addressed it here.

Note that the support for native metadata in dm-crypt by Mikulas will
need a rebase on top of this, but as it already requires another
block layer patch and the changes in this series will simplify it a bit
I hope that is ok.

The series is based on top of my previously sent "convert the SCSI ULDs
to the atomic queue limits API v2" API.

A git tree is available here:

   git://git.infradead.org/users/hch/block.git block-integrity-limits

Gitweb:

   http://git.infradead.org/?p=users/hch/block.git;a=shortlog;h=refs/heads/block-integrity-limits

Changes since v2:
 - keep the unused BIP_CTRL_NOCHECK, BIP_DISK_NOCHECK and
   BIP_IP_CHECKSUM flags for now

Changes since v1:
 - keep generating (empty) non-PI metadata
 - use a packed enum for the csum type
 - remove an unused flag left in the code

Diffstat:
 Documentation/block/data-integrity.rst |   49 ------
 block/Kconfig                          |    8 -
 block/Makefile                         |    3 
 block/bio-integrity.c                  |   43 +++--
 block/blk-integrity.c                  |  229 ++++++++----------------------
 block/blk-mq.c                         |   13 -
 block/blk-settings.c                   |  118 ++++++++++++++-
 block/blk.h                            |    8 +
 block/t10-pi.c                         |  249 +++++++++++----------------------
 drivers/md/dm-core.h                   |    1 
 drivers/md/dm-crypt.c                  |    4 
 drivers/md/dm-integrity.c              |   47 +-----
 drivers/md/dm-table.c                  |  161 +++------------------
 drivers/md/md.c                        |   72 ++-------
 drivers/md/md.h                        |    5 
 drivers/md/raid0.c                     |   28 +--
 drivers/md/raid1.c                     |   24 +--
 drivers/md/raid10.c                    |   10 -
 drivers/md/raid5.c                     |    2 
 drivers/nvdimm/btt.c                   |   13 -
 drivers/nvme/host/Kconfig              |    1 
 drivers/nvme/host/core.c               |   71 ++++-----
 drivers/nvme/host/multipath.c          |    3 
 drivers/nvme/target/Kconfig            |    1 
 drivers/nvme/target/io-cmd-bdev.c      |   16 +-
 drivers/scsi/Kconfig                   |    1 
 drivers/scsi/sd.c                      |    8 -
 drivers/scsi/sd.h                      |   12 -
 drivers/scsi/sd_dif.c                  |   45 ++---
 drivers/target/target_core_iblock.c    |   49 +++---
 include/linux/blk-integrity.h          |   62 ++------
 include/linux/blkdev.h                 |   25 ++-
 include/linux/t10-pi.h                 |   20 --
 33 files changed, 533 insertions(+), 868 deletions(-)