[PATCH 00/79] block: rnull: complete the rust null block driver

[Andreas Hindborg]

This series aims to bring the feature set of the Rust null block driver on
par with that of the C null_blk driver.

I intended to send these patches little by little as they became ready, but
due to dependencies everywhere, that did not work out. This series still
has quite a few dependencies, but they are all on the list. B4 should be able
to track them. I also prepared a tree with all the dependencies and this
series applied [1].

I tried to test everything thoroughly, but there are quite a few moving
parts. Tested-by tags and bug reports are highly appreciated.

I was a bit in doubt about whether I should organize all the block layer patches
first and then the driver patches later, or if I should move the Rust block
layer patches close to their corresponding driver use. I chose the latter,
because it is easier to connect a subsystem change with the corresponding
driver use that way.

Best regards,
Andreas Hindborg

[1] git https://git.kernel.org/pub/scm/linux/kernel/git/a.hindborg/linux.git rnull-v6.19-rc5

Signed-off-by: Andreas Hindborg <a.hindborg@xxxxxxxxxx>
---
Andreas Hindborg (79):
      block: rnull: adopt new formatting guidelines
      block: rnull: add module parameters
      block: rnull: add macros to define configfs attributes
      block: rust: fix generation of bindings to `BLK_STS_.*`
      block: rust: change `queue_rq` request type to `Owned`
      block: rust: add `Request` private data support
      block: rust: allow `hrtimer::Timer` in `RequestData`
      block: rnull: add timer completion mode
      block: rust: introduce `kernel::block::bio` module
      block: rust: add `command` getter to `Request`
      block: rust: mq: use GFP_KERNEL from prelude
      block: rust: add `TagSet` flags
      block: rnull: add memory backing
      block: rnull: add submit queue count config option
      block: rnull: add `use_per_node_hctx` config option
      block: rust: allow specifying home node when constructing `TagSet`
      block: rnull: allow specifying the home numa node
      block: rust: add Request::sectors() method
      block: rust: mq: add max_hw_discard_sectors support to GenDiskBuilder
      block: rnull: add discard support
      block: rust: add `NoDefaultScheduler` flag for `TagSet`
      block: rnull: add no_sched module parameter and configfs attribute
      block: rust: change sector type from usize to u64
      block: rust: add `BadBlocks` for bad block tracking
      block: rust: mq: add Request::end() method for custom status codes
      block: rnull: add badblocks support
      block: rnull: add badblocks_once support
      block: rnull: add partial I/O support for bad blocks
      block: rust: add `TagSet` private data support
      block: rust: add `hctx` private data support
      block: rnull: add volatile cache emulation
      block: rust: implement `Sync` for `GenDisk`.
      block: rust: add a back reference feature to `GenDisk`
      block: rust: introduce an idle type state for `Request`
      block: rust: add a request queue abstraction
      block: rust: add a method to get the request queue for a request
      block: rust: introduce `kernel::block::error`
      block: rust: require `queue_rq` to return a `BlkResult`
      block: rust: add `GenDisk::queue_data`
      block: rnull: add bandwidth limiting
      block: rnull: add blocking queue mode
      block: rnull: add shared tags
      block: rnull: add queue depth config option
      block: rust: add an abstraction for `bindings::req_op`
      block: rust: add a method to set the target sector of a request
      block: rust: move gendisk vtable construction to separate function
      block: rust: add zoned block device support
      block: rnull: add zoned storage support
      block: rust: add `map_queues` support
      block: rust: add an abstraction for `struct blk_mq_queue_map`
      block: rust: add polled completion support
      block: rust: add accessors to `TagSet`
      block: rnull: add polled completion support
      block: rnull: add REQ_OP_FLUSH support
      block: rust: add request flags abstraction
      block: rust: add abstraction for block queue feature flags
      block: rust: allow setting write cache and FUA flags for `GenDisk`
      block: rust: add `Segment::copy_to_page_limit`
      block: rnull: add fua support
      block: fix arg type in `blk_mq_update_nr_hw_queues`
      block: rust: add `GenDisk::tag_set`
      block: rust: add `TagSet::update_hw_queue_count`
      block: rnull: add an option to change the number of hardware queues
      block: rust: add an abstraction for `struct rq_list`
      block: rust: add `queue_rqs` vtable hook
      block: rnull: support queue_rqs
      block: rust: remove the `is_poll` parameter from `queue_rq`
      block: rust: add a debug assert for refcounts
      block: rust: add `TagSet::tag_to_rq`
      block: rust: add `Request::queue_index`
      block: rust: add `Request::requeue`
      block: rust: add `request_timeout` hook
      block: rnull: add fault injection support
      block: rust: add max_sectors option to `GenDiskBuilder`
      block: rnull: allow configuration of the maximum IO size
      block: rust: add `virt_boundary_mask` option to `GenDiskBuilder`
      block: rnull: add `virt_boundary` option
      block: rnull: add `shared_tag_bitmap` config option
      block: rnull: add zone offline and readonly configfs files

 block/blk-mq.c                           |   13 +-
 drivers/block/rnull/Kconfig              |   11 +
 drivers/block/rnull/configfs.rs          |  561 +++++++++++++--
 drivers/block/rnull/configfs/macros.rs   |  128 ++++
 drivers/block/rnull/disk_storage.rs      |  303 ++++++++
 drivers/block/rnull/disk_storage/page.rs |   76 ++
 drivers/block/rnull/rnull.rs             | 1137 ++++++++++++++++++++++++++++--
 drivers/block/rnull/util.rs              |   65 ++
 drivers/block/rnull/zoned.rs             |  694 ++++++++++++++++++
 include/linux/blk-mq.h                   |    2 +-
 rust/bindgen_parameters                  |    3 +
 rust/bindings/bindings_helper.h          |   55 ++
 rust/helpers/blk.c                       |   47 ++
 rust/kernel/block.rs                     |   97 +++
 rust/kernel/block/badblocks.rs           |  721 +++++++++++++++++++
 rust/kernel/block/bio.rs                 |  143 ++++
 rust/kernel/block/bio/vec.rs             |  414 +++++++++++
 rust/kernel/block/mq.rs                  |   63 +-
 rust/kernel/block/mq/feature.rs          |   73 ++
 rust/kernel/block/mq/gen_disk.rs         |  293 ++++++--
 rust/kernel/block/mq/operations.rs       |  464 +++++++++++-
 rust/kernel/block/mq/request.rs          |  634 ++++++++++++++---
 rust/kernel/block/mq/request/command.rs  |   65 ++
 rust/kernel/block/mq/request/flag.rs     |   62 ++
 rust/kernel/block/mq/request_list.rs     |  113 +++
 rust/kernel/block/mq/request_queue.rs    |   57 ++
 rust/kernel/block/mq/tag_set.rs          |  254 ++++++-
 rust/kernel/block/mq/tag_set/flags.rs    |   27 +
 rust/kernel/error.rs                     |    3 +-
 rust/kernel/lib.rs                       |    2 +
 rust/kernel/page.rs                      |    2 +-
 rust/kernel/time/hrtimer.rs              |    5 +-
 32 files changed, 6278 insertions(+), 309 deletions(-)
---
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Best regards,
-- 
Andreas Hindborg <a.hindborg@xxxxxxxxxx>