[PATCHv13 00/11] block write streams with nvme fdp

[Keith Busch <kbusch@meta.com>]

From: Keith Busch <kbusch@kernel.org>

Previous discussion threads:

  v12: https://lore.kernel.org/linux-nvme/20241206221801.790690-1-kbusch@meta.com/T/#u
  v11: https://lore.kernel.org/linux-nvme/20241206015308.3342386-1-kbusch@meta.com/T/#u

Changes from v12:

 - Removed statx. We need additional time to consider the best way to
   expose these attributes. Until then, applications can fallback to the
   sysfs block attribute to query write stream settings.

 - More verbose logging on error.

 - Added reviews.

 - Explicitly clear the return value to 0 for unsupported or
   unrecognized FDP configs; while it's not technically needed (it's
   already 0 in these paths), it makes it clear that a non-error return
   wasn't an accidental oversight.

 - Fixed the compiler warnings from unitialized variable; switched the
   do-while to a more clear for-loop.

 - Fixed long-line wrapping

 - Memory leak when cleaning up the namespace head.

 - Don't rescan FDP configuration if we successfully set it up before.
   The namespaces' FDP configuration is static.

 - Better function name querying the size granularity of the FDP reclaim
   unit.

Christoph Hellwig (7):
  fs: add a write stream field to the kiocb
  block: add a bi_write_stream field
  block: introduce a write_stream_granularity queue limit
  block: expose write streams for block device nodes
  nvme: add a nvme_get_log_lsi helper
  nvme: pass a void pointer to nvme_get/set_features for the result
  nvme: add FDP definitions

Keith Busch (4):
  block: introduce max_write_streams queue limit
  io_uring: enable per-io write streams
  nvme: register fdp parameters with the block layer
  nvme: use fdp streams if write stream is provided

 Documentation/ABI/stable/sysfs-block |  15 +++
 block/bio.c                          |   2 +
 block/blk-crypto-fallback.c          |   1 +
 block/blk-merge.c                    |   4 +
 block/blk-sysfs.c                    |   6 +
 block/bounce.c                       |   1 +
 block/fops.c                         |  23 ++++
 drivers/nvme/host/core.c             | 186 ++++++++++++++++++++++++++-
 drivers/nvme/host/nvme.h             |   7 +-
 include/linux/blk_types.h            |   1 +
 include/linux/blkdev.h               |  16 +++
 include/linux/fs.h                   |   1 +
 include/linux/nvme.h                 |  77 +++++++++++
 include/uapi/linux/io_uring.h        |   4 +
 io_uring/io_uring.c                  |   2 +
 io_uring/rw.c                        |   1 +
 16 files changed, 341 insertions(+), 6 deletions(-)

-- 
2.43.5