platform/kernel/linux-starfive.git
2 years agoMerge tag 'pull-work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Wed, 3 Aug 2022 18:31:42 +0000 (11:31 -0700)]
Merge tag 'pull-work.namei' of git://git./linux/kernel/git/viro/vfs

Pull vfs namei updates from Al Viro:
 "RCU pathwalk cleanups.

  Storing sampled ->d_seq of the next dentry in nameidata simplifies
  life considerably, especially if we delay fetching ->d_inode until
  step_into()"

* tag 'pull-work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  step_into(): move fetching ->d_inode past handle_mounts()
  lookup_fast(): don't bother with inode
  follow_dotdot{,_rcu}(): don't bother with inode
  step_into(): lose inode argument
  namei: stash the sampled ->d_seq into nameidata
  namei: move clearing LOOKUP_RCU towards rcu_read_unlock()
  switch try_to_unlazy_next() to __legitimize_mnt()
  follow_dotdot{,_rcu}(): change calling conventions
  namei: get rid of pointless unlikely(read_seqcount_retry(...))
  __follow_mount_rcu(): verify that mount_lock remains unchanged

2 years agoMerge tag 'folio-6.0' of git://git.infradead.org/users/willy/pagecache
Linus Torvalds [Wed, 3 Aug 2022 17:35:43 +0000 (10:35 -0700)]
Merge tag 'folio-6.0' of git://git.infradead.org/users/willy/pagecache

Pull folio updates from Matthew Wilcox:

 - Fix an accounting bug that made NR_FILE_DIRTY grow without limit
   when running xfstests

 - Convert more of mpage to use folios

 - Remove add_to_page_cache() and add_to_page_cache_locked()

 - Convert find_get_pages_range() to filemap_get_folios()

 - Improvements to the read_cache_page() family of functions

 - Remove a few unnecessary checks of PageError

 - Some straightforward filesystem conversions to use folios

 - Split PageMovable users out from address_space_operations into
   their own movable_operations

 - Convert aops->migratepage to aops->migrate_folio

 - Remove nobh support (Christoph Hellwig)

* tag 'folio-6.0' of git://git.infradead.org/users/willy/pagecache: (78 commits)
  fs: remove the NULL get_block case in mpage_writepages
  fs: don't call ->writepage from __mpage_writepage
  fs: remove the nobh helpers
  jfs: stop using the nobh helper
  ext2: remove nobh support
  ntfs3: refactor ntfs_writepages
  mm/folio-compat: Remove migration compatibility functions
  fs: Remove aops->migratepage()
  secretmem: Convert to migrate_folio
  hugetlb: Convert to migrate_folio
  aio: Convert to migrate_folio
  f2fs: Convert to filemap_migrate_folio()
  ubifs: Convert to filemap_migrate_folio()
  btrfs: Convert btrfs_migratepage to migrate_folio
  mm/migrate: Add filemap_migrate_folio()
  mm/migrate: Convert migrate_page() to migrate_folio()
  nfs: Convert to migrate_folio
  btrfs: Convert btree_migratepage to migrate_folio
  mm/migrate: Convert expected_page_refs() to folio_expected_refs()
  mm/migrate: Convert buffer_migrate_page() to buffer_migrate_folio()
  ...

2 years agoMerge tag 'xarray-6.0' of git://git.infradead.org/users/willy/xarray
Linus Torvalds [Wed, 3 Aug 2022 17:02:28 +0000 (10:02 -0700)]
Merge tag 'xarray-6.0' of git://git.infradead.org/users/willy/xarray

Pull XArray/IDR updates from Matthew Wilcox:

 - Add appropriate might_alloc() annotations to the XArray APIs

 - Document that the IDR is deprecated

* tag 'xarray-6.0' of git://git.infradead.org/users/willy/xarray:
  IDR: Note that the IDR API is deprecated
  XArray: Add calls to might_alloc()

2 years agoMerge tag 'cgroup-for-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Linus Torvalds [Wed, 3 Aug 2022 16:45:08 +0000 (09:45 -0700)]
Merge tag 'cgroup-for-5.20' of git://git./linux/kernel/git/tj/cgroup

Pull cgroup updates from Tejun Heo:
 "Several core optimizations:

   - threadgroup_rwsem write locking is skipped when configuring
     controllers in empty subtrees.

     Combined with CLONE_INTO_CGROUP, this allows the common static
     usage pattern to not grab threadgroup_rwsem at all (glibc still
     doesn't seem ready for CLONE_INTO_CGROUP unfortunately).

   - threadgroup_rwsem used to be put into non-percpu mode by default
     due to latency concerns in specific use cases. There's no reason
     for everyone else to pay for it. Make the behavior optional.

   - psi no longer allocates memory when disabled.

  ... along with some code cleanups"

* tag 'cgroup-for-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: Skip subtree root in cgroup_update_dfl_csses()
  cgroup: remove "no" prefixed mount options
  cgroup: Make !percpu threadgroup_rwsem operations optional
  cgroup: Add "no" prefixed mount options
  cgroup: Elide write-locking threadgroup_rwsem when updating csses on an empty subtree
  cgroup.c: remove redundant check for mixable cgroup in cgroup_migrate_vet_dst
  cgroup.c: add helper __cset_cgroup_from_root to cleanup duplicated codes
  psi: dont alloc memory for psi by default

2 years agovideo:backlight: remove reference to AVR32 architecture in ltv350qv
Hans-Christian Noren Egtvedt [Sat, 20 Oct 2018 10:40:16 +0000 (12:40 +0200)]
video:backlight: remove reference to AVR32 architecture in ltv350qv

The AVR32 architecture does no longer exist in the Linux kernel, hence
remove a reference to also non-existing Linux BSP CD from Atmel.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
2 years agovideo: remove support for non-existing atmel,at32ap-lcdc in atmel_lcdfb
Hans-Christian Noren Egtvedt [Sun, 5 Nov 2017 09:43:11 +0000 (10:43 +0100)]
video: remove support for non-existing atmel,at32ap-lcdc in atmel_lcdfb

The AVR32 architecture has been removed from the kernel in commit
26202873bb51fafdaa51be3e8de7aab9beb49f70, hence clean out the
atmel,at32ap-lcdc parts in the atmel_lcdfb.c video driver.

AVR32 architecture never supported device tree, hence this code was not
used by anybody.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
2 years agousb:udc: remove reference to AVR32 architecture in Atmel USBA Kconfig
Hans-Christian Noren Egtvedt [Sat, 20 Oct 2018 10:39:09 +0000 (12:39 +0200)]
usb:udc: remove reference to AVR32 architecture in Atmel USBA Kconfig

The AVR32 architecture does no longer exist in the Linux kernel, hence
remove a reference to it in Kconfig help text to avoid confusion.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
2 years agosound:spi: remove reference to AVR32 in Atmel AT73C213 DAC driver
Hans-Christian Noren Egtvedt [Sat, 20 Oct 2018 10:48:57 +0000 (12:48 +0200)]
sound:spi: remove reference to AVR32 in Atmel AT73C213 DAC driver

The AVR32 architecture does no longer exist in the Linux kernel, hence
remove a reference to it in Kconfig help text to avoid confusion.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
2 years agonet: remove cdns,at32ap7000-macb device tree entry
Hans-Christian Noren Egtvedt [Sun, 5 Nov 2017 10:19:53 +0000 (11:19 +0100)]
net: remove cdns,at32ap7000-macb device tree entry

The AVR32 architecture has been removed from the kernel in commit
26202873bb51fafdaa51be3e8de7aab9beb49f70, hence clean out the
cdns,at32ap7000-macb compatible entry in Cadence macb Ethernet driver.

AVR32 architecture never supported device tree, hence this code was not
used by anybody.

Updated documentation to match the default entry, no users of
cdns,at32ap7000-macb in the kernel tree.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
2 years agomisc: update maintainer email address and description for atmel-ssc
Hans-Christian Noren Egtvedt [Sat, 20 Oct 2018 10:33:59 +0000 (12:33 +0200)]
misc: update maintainer email address and description for atmel-ssc

I have changed my overall maintainer email address to the samfundet.no
domain, hence update the atmel-ssc module to reflect that.

Also remove the AVR32 reference, since the AVR32 architecture no longer
exist in the Linux kernel.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
2 years agomfd: remove reference to AVR32 architecture in atmel-smc.c
Hans-Christian Noren Egtvedt [Sat, 20 Oct 2018 10:30:17 +0000 (12:30 +0200)]
mfd: remove reference to AVR32 architecture in atmel-smc.c

The AVR32 architecture does no longer exist in the Linux kernel, hence
remove a reference to it in comments to avoid confusion.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
2 years agodma:dw: remove reference to AVR32 architecture in core.c
Hans-Christian Noren Egtvedt [Sat, 20 Oct 2018 10:30:17 +0000 (12:30 +0200)]
dma:dw: remove reference to AVR32 architecture in core.c

The AVR32 architecture does no longer exist in the Linux kernel, hence
remove a reference to it in comments to avoid confusion.

Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
2 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Paolo Abeni [Wed, 3 Aug 2022 06:50:42 +0000 (08:50 +0200)]
Merge git://git./linux/kernel/git/netdev/net

Conflicts:

net/ax25/af_ax25.c
  d7c4c9e075f8c ("ax25: fix incorrect dev_tracker usage")
  d62607c3fe459 ("net: rename reference+tracking helpers")

drivers/net/netdevsim/fib.c
  180a6a3ee60a ("netdevsim: fib: Fix reference count leak on route deletion failure")
  012ec02ae441 ("netdevsim: convert driver to use unlocked devlink API during init/fini")

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2 years agodoc: sfp-phylink: Fix a broken reference
Christophe JAILLET [Sun, 31 Jul 2022 05:59:00 +0000 (07:59 +0200)]
doc: sfp-phylink: Fix a broken reference

The commit in Fixes: has changed a .txt file into a .yaml file. Update the
documentation accordingly.

While at it add some `` around some file names to improve the output.

Fixes: 70991f1e6858 ("dt-bindings: net: convert sff,sfp to dtschema")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/be3c7e87ca7f027703247eccfe000b8e34805094.1659247114.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge tag 'amd-drm-next-5.20-2022-07-29' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Wed, 3 Aug 2022 04:00:18 +0000 (14:00 +1000)]
Merge tag 'amd-drm-next-5.20-2022-07-29' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

amd-drm-next-5.20-2022-07-29:

amdgpu:
- Misc spelling and grammar fixes
- DC whitespace cleanups
- ACP smatch fix
- GFX 11.0 updates
- PSP 13.0 updates
- VCN 4.0 updates
- DC FP fix for PPC64
- Misc bug fixes

amdkfd:
- SVM fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220729202742.6636-1-alexander.deucher@amd.com
2 years agoublk_drv: add support for UBLK_IO_NEED_GET_DATA
ZiyangZhang [Thu, 28 Jul 2022 12:39:16 +0000 (20:39 +0800)]
ublk_drv: add support for UBLK_IO_NEED_GET_DATA

UBLK_IO_NEED_GET_DATA is one ublk IO command. It is designed for a user
application who wants to allocate IO buffer and set IO buffer address
only after it receives an IO request from ublksrv. This is a reasonable
scenario because these users may use a RPC framework as one IO backend
to handle IO requests passed from ublksrv. And a RPC framework may
allocate its own buffer(or memory pool).

This new feature (UBLK_F_NEED_GET_DATA) is optional for ublk users.
Related userspace code has been added in ublksrv[1] as one pull request.

Test cases for this feature are added in ublksrv and all the tests pass.
The performance result shows that this new feature does bring additional
latency because one IO is issued back to ublk_drv once again to copy data
from bio vectors to user-provided data buffer. UBLK_IO_NEED_GET_DATA is
suitable for bigger block size such as 512B or 1MB.

[1] https://github.com/ming1/ubdsrv

Signed-off-by: ZiyangZhang <ZiyangZhang@linux.alibaba.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/3a21007ea1be8304246e654cebbd581ab0012623.1659011443.git.ZiyangZhang@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoublk_cmd.h: add one new ublk command: UBLK_IO_NEED_GET_DATA
ZiyangZhang [Thu, 28 Jul 2022 12:39:15 +0000 (20:39 +0800)]
ublk_cmd.h: add one new ublk command: UBLK_IO_NEED_GET_DATA

Add one new ublk command: UBLK_IO_NEED_GET_DATA. It is prepared for a new
feature designed for a user application who wants to allocate IO buffer
and set IO buffer address only after it receives an IO request from
ublksrv.

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: ZiyangZhang <ZiyangZhang@linux.alibaba.com>
Link: https://lore.kernel.org/r/c8a64b6b51c78340da7daa9e1054608695e79619.1659011443.git.ZiyangZhang@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoublk_drv: cleanup ublksrv_ctrl_dev_info
Ming Lei [Sat, 30 Jul 2022 09:27:50 +0000 (17:27 +0800)]
ublk_drv: cleanup ublksrv_ctrl_dev_info

Remove all block device related info from ublksrv_ctrl_dev_info,
meantime reduce its size into 64 bytes because:

1) ublksrv_ctrl_dev_info becomes cleaner without including any
block related info

2) generic set/get parameter command can be used to set block
related setting easily and cleanly

3) generic set/get parameter command can be used for extending
ublk without needing more info in ublksrv_ctrl_dev_info

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220730092750.1118167-5-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoublk_drv: add SET_PARAMS/GET_PARAMS control command
Ming Lei [Sat, 30 Jul 2022 09:27:49 +0000 (17:27 +0800)]
ublk_drv: add SET_PARAMS/GET_PARAMS control command

Add two commands to set/get parameters generically.

One important goal of ublk is to provide generic framework for making
block device by userspace flexibly.

As one generic block device, there are still lots of block parameters,
such as max_sectors, write_cache/fua, discard related limits,
zoned parameters, ...., so this patch starts to add generic mechanism
for set/get device parameters.

Both generic block parameters(all kinds of queue settings) and ublk
feature parameters can be covered with this way, then it becomes quite
easy to extend in future.

Add two parameter types are used so far: basic(covers basic queue setting
and misc settings which can't be grouped easily) and discard, basic type
must be set, and discard type becomes optional now

This way provides mechanism to simulate any kind of generic block device
from userspace easily, from both block queue setting viewpoint or ublk
feature viewpoint.

The style of putting all parameters together is suggested by Christoph.

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220730092750.1118167-4-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoublk_drv: fix ublk device leak in case that add_disk fails
Ming Lei [Sat, 30 Jul 2022 09:27:48 +0000 (17:27 +0800)]
ublk_drv: fix ublk device leak in case that add_disk fails

->free_disk is only called after disk is added successfully, so
drop ublk device reference in case of add_disk() failure.

Fixes: 6d9e6dfdf3b2 ("ublk: defer disk allocation")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220730092750.1118167-3-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoublk_drv: cancel device even though disk isn't up
Ming Lei [Sat, 30 Jul 2022 09:27:47 +0000 (17:27 +0800)]
ublk_drv: cancel device even though disk isn't up

Each ublk queue is started before adding disk, we have to cancel queues in
ublk_stop_dev() so that ubq daemon can be exited, otherwise DEL_DEV command
may hang forever.

Also avoid to cancel queues two times by checking if queue is ready,
otherwise use-after-free on io_uring may be triggered because ublk_stop_dev
is called by ublk_remove() too.

Fixes: 71f28f3136af ("ublk_drv: add io_uring based userspace block driver")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220730092750.1118167-2-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: fix leaking page ref on truncated direct io
Keith Busch [Tue, 12 Jul 2022 15:32:56 +0000 (08:32 -0700)]
block: fix leaking page ref on truncated direct io

The size being added to a bio from an iov is aligned to a block size
after the pages were gotten. If the new aligned size truncates the last
page, its reference was being leaked. Ensure all pages that were not
added to the bio have their reference released.

Since this essentially requires doing the same that bio_put_pages(), and
there was only one caller for that function, this patch makes the
put_page() loop common for everyone.

Fixes: b1a000d3b8ec5 ("block: relax direct io memory alignment")
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20220712153256.2202024-3-kbusch@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: ensure bio_iov_add_page can't fail
Keith Busch [Tue, 12 Jul 2022 15:32:55 +0000 (08:32 -0700)]
block: ensure bio_iov_add_page can't fail

Adding the page could fail on the bio_full() condition, which checks for
either exceeding the bio's max segments or total size exceeding
UINT_MAX. We already ensure the max segments can't be exceeded, so just
ensure the total size won't reach the limit. This simplifies error
handling and removes unnecessary repeated bio_full() checks.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20220712153256.2202024-2-kbusch@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: ensure iov_iter advances for added pages
Keith Busch [Tue, 12 Jul 2022 15:32:54 +0000 (08:32 -0700)]
block: ensure iov_iter advances for added pages

There are cases where a bio may not accept additional pages, and the iov
needs to advance to the last data length that was accepted. The zone
append used to handle this correctly, but was inadvertently broken when
the setup was made common with the normal r/w case.

Fixes: 576ed9135489c ("block: use bio_add_page in bio_iov_iter_get_pages")
Fixes: c58c0074c54c2 ("block/bio: remove duplicate append pages code")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20220712153256.2202024-1-kbusch@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agodrivers:md:fix a potential use-after-free bug
Wentao_Liang [Thu, 28 Jul 2022 11:39:19 +0000 (19:39 +0800)]
drivers:md:fix a potential use-after-free bug

In line 2884, "raid5_release_stripe(sh);" drops the reference to sh and
may cause sh to be released. However, sh is subsequently used in lines
2886 "if (sh->batch_head && sh != sh->batch_head)". This may result in an
use-after-free bug.

It can be fixed by moving "raid5_release_stripe(sh);" to the bottom of
the function.

Signed-off-by: Wentao_Liang <Wentao_Liang_g@163.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd/raid5: Ensure batch_last is released before sleeping for quiesce
Logan Gunthorpe [Wed, 27 Jul 2022 21:06:00 +0000 (15:06 -0600)]
md/raid5: Ensure batch_last is released before sleeping for quiesce

A race condition exists where if raid5_quiesce() is called in the
middle of a request that has set batch_last, it will deadlock.

batch_last will hold a reference to a stripe when raid5_quiesce() is
called. This will cause the next raid5_get_active_stripe() call to
sleep waiting for the quiesce to finish, but the raid5_quiesce() thread
will wait for active_stripes to go to zero which will never happen
because request thread is waiting for the quiesce to stop.

Fix this by creating a special __raid5_get_active_stripe() function
which takes the request context and clears the last_batch before
sleeping.

While we're at it, change the arguments of raid5_get_active_stripe()
to bools.

Fixes: 3312e6c887fe ("md/raid5: Keep a reference to last stripe_head for batch")
Reported-by: David Sloan <David.Sloan@eideticom.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd/raid5: Move stripe_request_ctx up
Logan Gunthorpe [Wed, 27 Jul 2022 21:05:59 +0000 (15:05 -0600)]
md/raid5: Move stripe_request_ctx up

Move stripe_request_ctx up. No functional changes intended.

This will be necessary in the next patch to release the batch_last
in the context before sleeping.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd/raid5: Drop unnecessary call to r5c_check_stripe_cache_usage()
Logan Gunthorpe [Wed, 27 Jul 2022 21:05:58 +0000 (15:05 -0600)]
md/raid5: Drop unnecessary call to r5c_check_stripe_cache_usage()

Now that raid5_get_active_stripe() has been refactored it is appearant
that r5c_check_stripe_cache_usage() doesn't need to be called in
the wait_for_stripe branch.

r5c_check_stripe_cache_usage() will only conditionally call
r5l_wake_reclaim(), but that function is called two lines later.

Drop the call for cleanup.

Reported-by: Martin Oliveira <martin.oliveira@eideticom.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd/raid5: Make is_inactive_blocked() helper
Logan Gunthorpe [Wed, 27 Jul 2022 21:05:57 +0000 (15:05 -0600)]
md/raid5: Make is_inactive_blocked() helper

The logic to wait_for_stripe is difficult to parse being on so many
lines and with confusing operator precedence. Move it to a helper
function to make it easier to read.

No functional changes intended.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd/raid5: Refactor raid5_get_active_stripe()
Logan Gunthorpe [Wed, 27 Jul 2022 21:05:56 +0000 (15:05 -0600)]
md/raid5: Refactor raid5_get_active_stripe()

Refactor the raid5_get_active_stripe() to read more linearly in
the order it's typically executed.

The init_stripe() call is called if a free stripe is found and the
function is exited early which removes a lot of if (sh) checks and
unindents the following code.

Remove the while loop in favour of the 'goto retry' pattern, which
reduces indentation further. And use a 'goto wait_for_stripe' instead
of an additional indent seeing it is the unusual path and this makes
the code easier to read.

No functional changes intended. Will make subsequent changes
in patches easier to understand.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: pass struct queue_limits to the bio splitting helpers
Christoph Hellwig [Wed, 27 Jul 2022 16:23:00 +0000 (12:23 -0400)]
block: pass struct queue_limits to the bio splitting helpers

Allow using the splitting helpers on just a queue_limits instead of
a full request_queue structure.  This will eventually allow file systems
or remapping drivers to split REQ_OP_ZONE_APPEND bios based on limits
calculated as the minimum common capabilities over multiple devices.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20220727162300.3089193-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: move bio_allowed_max_sectors to blk-merge.c
Christoph Hellwig [Wed, 27 Jul 2022 16:22:59 +0000 (12:22 -0400)]
block: move bio_allowed_max_sectors to blk-merge.c

Move this helper into the only file where it is used.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20220727162300.3089193-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: move the call to get_max_io_size out of blk_bio_segment_split
Christoph Hellwig [Wed, 27 Jul 2022 16:22:58 +0000 (12:22 -0400)]
block: move the call to get_max_io_size out of blk_bio_segment_split

Prepare for reusing blk_bio_segment_split for (file system controlled)
splits of REQ_OP_ZONE_APPEND bios by letting the caller control the
maximum size of the bio.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20220727162300.3089193-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: move ->bio_split to the gendisk
Christoph Hellwig [Wed, 27 Jul 2022 16:22:57 +0000 (12:22 -0400)]
block: move ->bio_split to the gendisk

Only non-passthrough requests are split by the block layer and use the
->bio_split bio_set.  Move it from the request_queue to the gendisk.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20220727162300.3089193-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoMerge tag 'flexible-array-transformations-UAPI-6.0-rc1' of git://git.kernel.org/pub...
Linus Torvalds [Wed, 3 Aug 2022 02:50:47 +0000 (19:50 -0700)]
Merge tag 'flexible-array-transformations-UAPI-6.0-rc1' of git://git./linux/kernel/git/gustavoars/linux

Pull uapi flexible array update from Gustavo Silva:
 "A treewide patch that replaces zero-length arrays with flexible-array
  members in UAPI. This has been baking in linux-next for 5 weeks now.

  '-fstrict-flex-arrays=3' is coming and we need to land these changes
  to prevent issues like these in the short future:

    fs/minix/dir.c:337:3: warning: 'strcpy' will always overflow; destination buffer has size 0, but the source string has length 2 (including NUL byte) [-Wfortify-source]
strcpy(de3->name, ".");
^

  Since these are all [0] to [] changes, the risk to UAPI is nearly
  zero. If this breaks anything, we can use a union with a new member
  name"

Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101836
* tag 'flexible-array-transformations-UAPI-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
  treewide: uapi: Replace zero-length arrays with flexible-array members

2 years agoMerge tag 'linux-kselftest-next-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kerne...
Linus Torvalds [Wed, 3 Aug 2022 02:44:56 +0000 (19:44 -0700)]
Merge tag 'linux-kselftest-next-5.20-rc1' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull Kselftest updates from Shuah Khan:

 - timers test build fixes and cleanups for new tool chains

 - removing khdr from kselftest framework and main Makefile

 - changes to test output messages to improve reports

* tag 'linux-kselftest-next-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (24 commits)
  Makefile: replace headers_install with headers for kselftest
  selftests/landlock: drop deprecated headers dependency
  selftests: timers: clocksource-switch: adapt to kselftest framework
  selftests: timers: clocksource-switch: add 'runtime' command line parameter
  selftests: timers: clocksource-switch: add command line switch to skip sanity check
  selftests: timers: clocksource-switch: sort includes
  selftests: timers: clocksource-switch: fix passing errors from child
  selftests: timers: inconsistency-check: adapt to kselftest framework
  selftests: timers: nanosleep: adapt to kselftest framework
  selftests: timers: fix declarations of main()
  selftests: timers: valid-adjtimex: build fix for newer toolchains
  Makefile: add headers_install to kselftest targets
  selftests: drop KSFT_KHDR_INSTALL make target
  selftests: stop using KSFT_KHDR_INSTALL
  selftests: drop khdr make target
  selftests: drivers/dma-buf: Improve message in selftest summary
  selftests/kcmp: Make the test output consistent and clear
  selftests:timers: globals don't need initialization to 0
  selftests/drivers/gpu: Add error messages to drm_mm.sh
  selftests/tpm2: increase timeout for kselftests
  ...

2 years agoMerge tag 'linux-kselftest-kunit-5.20-rc1' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Wed, 3 Aug 2022 02:34:45 +0000 (19:34 -0700)]
Merge tag 'linux-kselftest-kunit-5.20-rc1' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull KUnit updates from Shuah Khan:
 "This consists of several fixes and an important feature to discourage
  running KUnit tests on production systems. Running tests on a
  production system could leave the system in a bad state.

  Summary:

   - Add a new taint type, TAINT_TEST to signal that a test has been
     run.

     This should discourage people from running these tests on
     production systems, and to make it easier to tell if tests have
     been run accidentally (by loading the wrong configuration, etc)

   - Several documentation and tool enhancements and fixes"

* tag 'linux-kselftest-kunit-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits)
  Documentation: KUnit: Fix example with compilation error
  Documentation: kunit: Add CLI args for kunit_tool
  kcsan: test: Add a .kunitconfig to run KCSAN tests
  kunit: executor: Fix a memory leak on failure in kunit_filter_tests
  clk: explicitly disable CONFIG_UML_PCI_OVER_VIRTIO in .kunitconfig
  mmc: sdhci-of-aspeed: test: Use kunit_test_suite() macro
  nitro_enclaves: test: Use kunit_test_suite() macro
  thunderbolt: test: Use kunit_test_suite() macro
  kunit: flatten kunit_suite*** to kunit_suite** in .kunit_test_suites
  kunit: unify module and builtin suite definitions
  selftest: Taint kernel when test module loaded
  module: panic: Taint the kernel when selftest modules load
  Documentation: kunit: fix example run_kunit func to allow spaces in args
  Documentation: kunit: Cleanup run_wrapper, fix x-ref
  kunit: test.h: fix a kernel-doc markup
  kunit: tool: Enable virtio/PCI by default on UML
  kunit: tool: make --kunitconfig repeatable, blindly concat
  kunit: add coverage_uml.config to enable GCOV on UML
  kunit: tool: refactor internal kconfig handling, allow overriding
  kunit: tool: introduce --qemu_args
  ...

2 years agoMerge tag 'docs-6.0' of git://git.lwn.net/linux
Linus Torvalds [Wed, 3 Aug 2022 02:24:24 +0000 (19:24 -0700)]
Merge tag 'docs-6.0' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "This was a moderately busy cycle for documentation, but nothing
  all that earth-shaking:

   - More Chinese translations, and an update to the Italian
     translations.

     The Japanese, Korean, and traditional Chinese translations
     are more-or-less unmaintained at this point, instead.

   - Some build-system performance improvements.

   - The removal of the archaic submitting-drivers.rst document,
     with the movement of what useful material that remained into
     other docs.

   - Improvements to sphinx-pre-install to, hopefully, give more
     useful suggestions.

   - A number of build-warning fixes

  Plus the usual collection of typo fixes, updates, and more"

* tag 'docs-6.0' of git://git.lwn.net/linux: (92 commits)
  docs: efi-stub: Fix paths for x86 / arm stubs
  Docs/zh_CN: Update the translation of sched-stats to 5.19-rc8
  Docs/zh_CN: Update the translation of pci to 5.19-rc8
  Docs/zh_CN: Update the translation of pci-iov-howto to 5.19-rc8
  Docs/zh_CN: Update the translation of usage to 5.19-rc8
  Docs/zh_CN: Update the translation of testing-overview to 5.19-rc8
  Docs/zh_CN: Update the translation of sparse to 5.19-rc8
  Docs/zh_CN: Update the translation of kasan to 5.19-rc8
  Docs/zh_CN: Update the translation of iio_configfs to 5.19-rc8
  doc:it_IT: align Italian documentation
  docs: Remove spurious tag from admin-guide/mm/overcommit-accounting.rst
  Documentation: process: Update email client instructions for Thunderbird
  docs: ABI: correct QEMU fw_cfg spec path
  doc/zh_CN: remove submitting-driver reference from docs
  docs: zh_TW: align to submitting-drivers removal
  docs: zh_CN: align to submitting-drivers removal
  docs: ko_KR: howto: remove reference to removed submitting-drivers
  docs: ja_JP: howto: remove reference to removed submitting-drivers
  docs: it_IT: align to submitting-drivers removal
  docs: process: remove outdated submitting-drivers.rst
  ...

2 years agoMerge tag 'nolibc.2022.07.27a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulm...
Linus Torvalds [Wed, 3 Aug 2022 02:22:24 +0000 (19:22 -0700)]
Merge tag 'nolibc.2022.07.27a' of git://git./linux/kernel/git/paulmck/linux-rcu

Pull nolibc updates from Paul McKenney:
 "This provides nolibc updates, perhaps most notably improved testing
  via the 'cd tools/include/nolibc; make headers' command. This should
  be considered a smoke test. More thorough testing is in the works"

* tag 'nolibc.2022.07.27a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
  tools/nolibc: add a help target to list supported targets
  tools/nolibc: make the default target build the headers
  tools/nolibc: fix the makefile to also work as "make -C tools ..."
  tools/nolibc/stdio: Add format attribute to enable printf warnings
  tools/nolibc/stdlib: Support overflow checking for older compiler versions

2 years agoMerge tag 'rcu.2022.07.26a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck...
Linus Torvalds [Wed, 3 Aug 2022 02:12:45 +0000 (19:12 -0700)]
Merge tag 'rcu.2022.07.26a' of git://git./linux/kernel/git/paulmck/linux-rcu

Pull RCU updates from Paul McKenney:

 - Documentation updates

 - Miscellaneous fixes

 - Callback-offload updates, perhaps most notably a new
   RCU_NOCB_CPU_DEFAULT_ALL Kconfig option that causes all CPUs to be
   offloaded at boot time, regardless of kernel boot parameters.

   This is useful to battery-powered systems such as ChromeOS and
   Android. In addition, a new RCU_NOCB_CPU_CB_BOOST kernel boot
   parameter prevents offloaded callbacks from interfering with
   real-time workloads and with energy-efficiency mechanisms

 - Polled grace-period updates, perhaps most notably making these APIs
   account for both normal and expedited grace periods

 - Tasks RCU updates, perhaps most notably reducing the CPU overhead of
   RCU tasks trace grace periods by more than a factor of two on a
   system with 15,000 tasks.

   The reduction is expected to increase with the number of tasks, so it
   seems reasonable to hypothesize that a system with 150,000 tasks
   might see a 20-fold reduction in CPU overhead

 - Torture-test updates

 - Updates that merge RCU's dyntick-idle tracking into context tracking,
   thus reducing the overhead of transitioning to kernel mode from
   either idle or nohz_full userspace execution for kernels that track
   context independently of RCU.

   This is expected to be helpful primarily for kernels built with
   CONFIG_NO_HZ_FULL=y

* tag 'rcu.2022.07.26a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (98 commits)
  rcu: Add irqs-disabled indicator to expedited RCU CPU stall warnings
  rcu: Diagnose extended sync_rcu_do_polled_gp() loops
  rcu: Put panic_on_rcu_stall() after expedited RCU CPU stall warnings
  rcutorture: Test polled expedited grace-period primitives
  rcu: Add polled expedited grace-period primitives
  rcutorture: Verify that polled GP API sees synchronous grace periods
  rcu: Make Tiny RCU grace periods visible to polled APIs
  rcu: Make polled grace-period API account for expedited grace periods
  rcu: Switch polled grace-period APIs to ->gp_seq_polled
  rcu/nocb: Avoid polling when my_rdp->nocb_head_rdp list is empty
  rcu/nocb: Add option to opt rcuo kthreads out of RT priority
  rcu: Add nocb_cb_kthread check to rcu_is_callbacks_kthread()
  rcu/nocb: Add an option to offload all CPUs on boot
  rcu/nocb: Fix NOCB kthreads spawn failure with rcu_nocb_rdp_deoffload() direct call
  rcu/nocb: Invert rcu_state.barrier_mutex VS hotplug lock locking order
  rcu/nocb: Add/del rdp to iterate from rcuog itself
  rcu/tree: Add comment to describe GP-done condition in fqs loop
  rcu: Initialize first_gp_fqs at declaration in rcu_gp_fqs()
  rcu/kvfree: Remove useless monitor_todo flag
  rcu: Cleanup RCU urgency state for offline CPU
  ...

2 years agoMerge tag 'v5.20-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Wed, 3 Aug 2022 00:45:14 +0000 (17:45 -0700)]
Merge tag 'v5.20-p1' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
"API:

   - Make proc files report fips module name and version

  Algorithms:

   - Move generic SHA1 code into lib/crypto

   - Implement Chinese Remainder Theorem for RSA

   - Remove blake2s

   - Add XCTR with x86/arm64 acceleration

   - Add POLYVAL with x86/arm64 acceleration

   - Add HCTR2

   - Add ARIA

  Drivers:

   - Add support for new CCP/PSP device ID in ccp"

* tag 'v5.20-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (89 commits)
  crypto: tcrypt - Remove the static variable initialisations to NULL
  crypto: arm64/poly1305 - fix a read out-of-bound
  crypto: hisilicon/zip - Use the bitmap API to allocate bitmaps
  crypto: hisilicon/sec - fix auth key size error
  crypto: ccree - Remove a useless dma_supported() call
  crypto: ccp - Add support for new CCP/PSP device ID
  crypto: inside-secure - Add missing MODULE_DEVICE_TABLE for of
  crypto: hisilicon/hpre - don't use GFP_KERNEL to alloc mem during softirq
  crypto: testmgr - some more fixes to RSA test vectors
  cyrpto: powerpc/aes - delete the rebundant word "block" in comments
  hwrng: via - Fix comment typo
  crypto: twofish - Fix comment typo
  crypto: rmd160 - fix Kconfig "its" grammar
  crypto: keembay-ocs-ecc - Drop if with an always false condition
  Documentation: qat: rewrite description
  Documentation: qat: Use code block for qat sysfs example
  crypto: lib - add module license to libsha1
  crypto: lib - make the sha1 library optional
  crypto: lib - move lib/sha1.c into lib/crypto/
  crypto: fips - make proc files report fips module name and version
  ...

2 years agoMerge tag 'random-6.0-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 3 Aug 2022 00:31:35 +0000 (17:31 -0700)]
Merge tag 'random-6.0-rc1-for-linus' of git://git./linux/kernel/git/crng/random

Pull random number generator updates from Jason Donenfeld:
 "Though there's been a decent amount of RNG-related development during
  this last cycle, not all of it is coming through this tree, as this
  cycle saw a shift toward tackling early boot time seeding issues,
  which took place in other trees as well.

  Here's a summary of the various patches:

   - The CONFIG_ARCH_RANDOM .config option and the "nordrand" boot
     option have been removed, as they overlapped with the more widely
     supported and more sensible options, CONFIG_RANDOM_TRUST_CPU and
     "random.trust_cpu". This change allowed simplifying a bit of arch
     code.

   - x86's RDRAND boot time test has been made a bit more robust, with
     RDRAND disabled if it's clearly producing bogus results. This would
     be a tip.git commit, technically, but I took it through random.git
     to avoid a large merge conflict.

   - The RNG has long since mixed in a timestamp very early in boot, on
     the premise that a computer that does the same things, but does so
     starting at different points in wall time, could be made to still
     produce a different RNG state. Unfortunately, the clock isn't set
     early in boot on all systems, so now we mix in that timestamp when
     the time is actually set.

   - User Mode Linux now uses the host OS's getrandom() syscall to
     generate a bootloader RNG seed and later on treats getrandom() as
     the platform's RDRAND-like faculty.

   - The arch_get_random_{seed_,}_long() family of functions is now
     arch_get_random_{seed_,}_longs(), which enables certain platforms,
     such as s390, to exploit considerable performance advantages from
     requesting multiple CPU random numbers at once, while at the same
     time compiling down to the same code as before on platforms like
     x86.

   - A small cleanup changing a cmpxchg() into a try_cmpxchg(), from
     Uros.

   - A comment spelling fix"

More info about other random number changes that come in through various
architecture trees in the full commentary in the pull request:

  https://lore.kernel.org/all/20220731232428.2219258-1-Jason@zx2c4.com/

* tag 'random-6.0-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
  random: correct spelling of "overwrites"
  random: handle archrandom with multiple longs
  um: seed rng using host OS rng
  random: use try_cmpxchg in _credit_init_bits
  timekeeping: contribute wall clock to rng on time change
  x86/rdrand: Remove "nordrand" flag in favor of "random.trust_cpu"
  random: remove CONFIG_ARCH_RANDOM

2 years agoblock: change the blk_queue_bounce calling convention
Christoph Hellwig [Wed, 27 Jul 2022 16:22:56 +0000 (12:22 -0400)]
block: change the blk_queue_bounce calling convention

The double indirect bio leads to somewhat suboptimal code generation.
Instead return the (original or split) bio, and make sure the
request_queue arguments to the lower level helpers is passed after the
bio to avoid constant reshuffling of the argument passing registers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20220727162300.3089193-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: change the blk_queue_split calling convention
Christoph Hellwig [Wed, 27 Jul 2022 16:22:55 +0000 (12:22 -0400)]
block: change the blk_queue_split calling convention

The double indirect bio leads to somewhat suboptimal code generation.
Instead return the (original or split) bio, and make sure the
request_queue arguments to the lower level helpers is passed after the
bio to avoid constant reshuffling of the argument passing registers.

Also give it and the helpers used to implement it more descriptive names.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220727162300.3089193-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: update MAINTAINERS for the new auth code
Christoph Hellwig [Mon, 25 Jul 2022 05:40:26 +0000 (07:40 +0200)]
nvme: update MAINTAINERS for the new auth code

Add the common subdirectory and match all nvme* headers in
include/linux/.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvmet-tcp: fix lockdep complaint on nvmet_tcp_wq flush during queue teardown
Sagi Grimberg [Sun, 24 Jul 2022 08:58:43 +0000 (11:58 +0300)]
nvmet-tcp: fix lockdep complaint on nvmet_tcp_wq flush during queue teardown

We probably need nvmet_tcp_wq to have MEM_RECLAIM as we are
sending/receiving for the socket from works on this workqueue.
Also this eliminates lockdep complaints:
--
[ 6174.010200] workqueue: WQ_MEM_RECLAIM
nvmet-wq:nvmet_tcp_release_queue_work [nvmet_tcp] is flushing
!WQ_MEM_RECLAIM nvmet_tcp_wq:nvmet_tcp_io_work [nvmet_tcp]
[ 6174.010216] WARNING: CPU: 20 PID: 14456 at kernel/workqueue.c:2628
check_flush_dependency+0x110/0x14c

Reported-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: enable generic interface (/dev/ngXnY) for unknown command sets
Joel Granados [Tue, 12 Jul 2022 18:33:04 +0000 (20:33 +0200)]
nvme: enable generic interface (/dev/ngXnY) for unknown command sets

Extend nvme_alloc_ns() and nvme_validate_ns() for unknown command-set as
well. Both are made to use a new helper (nvme_update_ns_info_cs_indep)
which is similar to nvme_update_ns_info but performs fewer operations
to get the generic interface up.

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
[hch: rebased on other refactoring patches]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: factor out a nvme_ns_is_readonly helper
Christoph Hellwig [Wed, 13 Jul 2022 05:40:25 +0000 (07:40 +0200)]
nvme: factor out a nvme_ns_is_readonly helper

Add a little helper to check if a namespace should be marked read-only
that uses a new is_readonly flag in the nvme_ns_info structure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Joel Granados <j.granados@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: refactor namespace probing
Christoph Hellwig [Fri, 22 Jul 2022 16:24:18 +0000 (18:24 +0200)]
nvme: refactor namespace probing

Change nvme_ns_scan to gather all information needed for generic
namespace setup into a nvme_ns_info structure.  This structure is filled
from the Command Set Idependent Identify Namespace data structure if
it is available or else the legacy Identify namespace structure.

With that everything related to the NVM command set (and the ZNS command
set derived from it) can be encapsulated in the nvme_update_ns_info_block
function while keeping the rest of the namespace probing generic.

The downside is that we now always issue two Identify Namespace calls for
each probed namespace instead of usually just a single one previously.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Joel Granados <j.granados@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: generalize the nvme_multi_css check in nvme_scan_ns
Christoph Hellwig [Tue, 12 Jul 2022 16:15:01 +0000 (18:15 +0200)]
nvme: generalize the nvme_multi_css check in nvme_scan_ns

Check for multiple command set support early on an error out if is
not supported when a !NVM command set namespace is found.  This
prepares for adding command set independent passthrough support.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Joel Granados <j.granados@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: rename nvme_validate_or_alloc_ns to nvme_scan_ns
Christoph Hellwig [Tue, 12 Jul 2022 16:07:53 +0000 (18:07 +0200)]
nvme: rename nvme_validate_or_alloc_ns to nvme_scan_ns

This shorter name much better fits what this function does in
the scanning process.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Javier González <javier.gonz@samsung.com>
Reviewed-by: Joel Granados <j.granados@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: catch -ENODEV from nvme_revalidate_zones again
Christoph Hellwig [Thu, 21 Jul 2022 05:56:35 +0000 (07:56 +0200)]
nvme: catch -ENODEV from nvme_revalidate_zones again

nvme_revalidate_zones can also return -ENODEV if e.g. zone sizes aren't
constant or not a power of two.  In that case we should jump to marking
the gendisk hidden and only support pass through.

Fixes: 602e57c9799c ("nvme: also mark passthrough-only namespaces ready in nvme_update_ns_info")
Reported-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Joel Granados <j.granados@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvmet-auth: select the intended CRYPTO_DH_RFC7919_GROUPS
Lukas Bulwahn [Wed, 20 Jul 2022 11:37:17 +0000 (13:37 +0200)]
nvmet-auth: select the intended CRYPTO_DH_RFC7919_GROUPS

Commit 71ebe3842ebe ("nvmet-auth: Diffie-Hellman key exchange support")
intends to select 'Support for RFC 7919 FFDHE group parameters' for using
FFDHE groups for NVMe In-Band Authentication.

It however selects CRYPTO_DH_GROUPS_RFC7919, instead of the intended
CRYPTO_DH_RFC7919_GROUPS; notice the swapping of words here.

Correct the select to the intended config option.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvmet-auth: fix return value check in auth receive
Chaitanya Kulkarni [Mon, 18 Jul 2022 23:12:33 +0000 (16:12 -0700)]
nvmet-auth: fix return value check in auth receive

nvmet_auth_challenge() return type is int and currently it uses status
variable that is of type u16 in nvmet_execute_auth_receive().

Catch the return value of nvmet_auth_challenge() into int and set the
NVME_SC_INTERNAL as status variable before we jump to error.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvmet-auth: fix return value check in auth send
Chaitanya Kulkarni [Mon, 18 Jul 2022 23:12:32 +0000 (16:12 -0700)]
nvmet-auth: fix return value check in auth send

nvmet_setup_auth() return type is int and currently it uses status
variable that is of type u16 in nvmet_execute_auth_send().

Catch the return value of nvmet_setup_auth() into int and set the
NVME_SC_INTERNAL as status variable before we jump to error.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvmet-auth: fix a couple of spelling mistakes
Colin Ian King [Fri, 15 Jul 2022 13:24:13 +0000 (14:24 +0100)]
nvmet-auth: fix a couple of spelling mistakes

There are a couple of spelling mistakes in pr_warn and pr_debug messages.
Fix them.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvmet: fix a format specifier in nvmet_auth_ctrl_exponential
Christoph Hellwig [Mon, 18 Jul 2022 05:02:29 +0000 (07:02 +0200)]
nvmet: fix a format specifier in nvmet_auth_ctrl_exponential

dh_keysize is a size_t, use the proper format specifier for printing it.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Hannes Reinecke <hare@sues.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvmet: don't check for NULL pointer before kfree in nvmet_host_release
Christoph Hellwig [Mon, 18 Jul 2022 05:00:12 +0000 (07:00 +0200)]
nvmet: don't check for NULL pointer before kfree in nvmet_host_release

And add an empty line after the variable declaration.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-apple: stop casting function pointer signatures
Christoph Hellwig [Fri, 15 Jul 2022 09:54:36 +0000 (11:54 +0200)]
nvme-apple: stop casting function pointer signatures

Casting function pointers breaks control flow enforcement and is
generally a horrible coding style.

Add two wrappers to get rid of these casts.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-tcp: split nvme_tcp_alloc_tagset
Christoph Hellwig [Thu, 21 Jul 2022 06:23:19 +0000 (08:23 +0200)]
nvme-tcp: split nvme_tcp_alloc_tagset

Split nvme_tcp_alloc_tagset into one helper for the admin tag_set and
one for the I/O tag set.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-rdma: split nvme_rdma_alloc_tagset
Christoph Hellwig [Thu, 21 Jul 2022 06:19:02 +0000 (08:19 +0200)]
nvme-rdma: split nvme_rdma_alloc_tagset

Split nvme_rdma_alloc_tagset into one helper for the admin tag_set and
one for the I/O tag set.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-pci: split nvme_dev_add
Christoph Hellwig [Thu, 21 Jul 2022 06:13:23 +0000 (08:13 +0200)]
nvme-pci: split nvme_dev_add

Split nvme_dev_add into a helper to actually allocate the tag set, and
one that just update the number of queues.  Add a local variable for
the tag_set to clean up the code a bit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-pci: split nvme_alloc_admin_tags
Christoph Hellwig [Thu, 21 Jul 2022 06:07:14 +0000 (08:07 +0200)]
nvme-pci: split nvme_alloc_admin_tags

Split nvme_alloc_admin_tags into a helper to actually allocate the
tag set, and one that just restarts the admin queue.  Add a local
variable for the tag_set to clean up the code a bit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-pci: print the command name of aborted commands
Christoph Hellwig [Mon, 18 Jul 2022 05:13:24 +0000 (07:13 +0200)]
nvme-pci: print the command name of aborted commands

To allow for slightly better debugging, print the command name when
aborting an command.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-pci: remove useless assignment in nvme_pci_setup_prps
Liu Song [Sat, 16 Jul 2022 11:49:41 +0000 (19:49 +0800)]
nvme-pci: remove useless assignment in nvme_pci_setup_prps

If prp_list is NULL, nvme_unmap_sg will be performed, and the assignment
to first_dma is meaningless, so remove it.

Signed-off-by: Liu Song <liusong@linux.alibaba.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-auth: uninitialized variable in nvme_auth_transform_key()
Dan Carpenter [Mon, 18 Jul 2022 11:10:45 +0000 (14:10 +0300)]
nvme-auth: uninitialized variable in nvme_auth_transform_key()

A couple of the early error gotos call kfree_sensitive(transformed_key);
before "transformed_key" has been initialized.

Fixes: db1312dd9548 ("nvmet: implement basic In-Band Authentication")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-auth: fix off by one checks
Dan Carpenter [Mon, 18 Jul 2022 11:09:32 +0000 (14:09 +0300)]
nvme-auth: fix off by one checks

The > ARRAY_SIZE() checks need to be >= ARRAY_SIZE() to prevent reading
one element beyond the end of the arrays.

Fixes: db1312dd9548 ("nvmet: implement basic In-Band Authentication")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: define compat_ioctl again to unbreak 32-bit userspace.
Nick Bowler [Thu, 21 Jul 2022 03:57:35 +0000 (23:57 -0400)]
nvme: define compat_ioctl again to unbreak 32-bit userspace.

Commit 89b3d6e60550 ("nvme: simplify the compat ioctl handling") removed
the initialization of compat_ioctl from the nvme block_device_operations
structures.

Presumably the expectation was that 32-bit ioctls would be directed
through the regular handler but this is not the case: failing to assign
.compat_ioctl actually means that the compat case is disabled entirely,
and any attempt to submit nvme ioctls from 32-bit userspace fails
outright with -ENOTTY.

For example:

  % smartctl -x /dev/nvme0n1
  [...]
  Read NVMe Identify Controller failed: NVME_IOCTL_ADMIN_CMD: Inappropriate ioctl for device

The blkdev_compat_ptr_ioctl helper can be used to direct compat calls
through the main ioctl handler and makes things work again.

Fixes: 89b3d6e60550 ("nvme: simplify the compat ioctl handling")
Signed-off-by: Nick Bowler <nbowler@draconx.ca>
Reviewed-by: Guixin Liu <kanie@linux.alibaba.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: don't always build constants.o
Christoph Hellwig [Mon, 18 Jul 2022 05:07:26 +0000 (07:07 +0200)]
nvme: don't always build constants.o

The entire content of constants.c if guarded by an ifdef, so switch to
just building the file conditionally instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme: use command_id instead of req->tag in trace_nvme_complete_rq()
Bean Huo [Fri, 15 Jul 2022 21:27:21 +0000 (23:27 +0200)]
nvme: use command_id instead of req->tag in trace_nvme_complete_rq()

Use command_id instead of req->tag in trace_nvme_complete_rq(),
because of commit e7006de6c238 ("nvme: code command_id with a genctr
for use authentication after release"), cmd->common.command_id is set to
((genctl & 0xf)< 12 | req->tag), no longer req->tag, which makes cid in
trace_nvme_complete_rq and trace_nvme_setup_cmd are not the same.

Fixes: e7006de6c238 ("nvme: code command_id with a genctr for use authentication after release")
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd-raid10: fix KASAN warning
Mikulas Patocka [Tue, 26 Jul 2022 08:33:12 +0000 (04:33 -0400)]
md-raid10: fix KASAN warning

There's a KASAN warning in raid10_remove_disk when running the lvm
test lvconvert-raid-reshape.sh. We fix this warning by verifying that the
value "number" is valid.

BUG: KASAN: slab-out-of-bounds in raid10_remove_disk+0x61/0x2a0 [raid10]
Read of size 8 at addr ffff889108f3d300 by task mdX_raid10/124682

CPU: 3 PID: 124682 Comm: mdX_raid10 Not tainted 5.19.0-rc6 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x34/0x44
 print_report.cold+0x45/0x57a
 ? __lock_text_start+0x18/0x18
 ? raid10_remove_disk+0x61/0x2a0 [raid10]
 kasan_report+0xa8/0xe0
 ? raid10_remove_disk+0x61/0x2a0 [raid10]
 raid10_remove_disk+0x61/0x2a0 [raid10]
Buffer I/O error on dev dm-76, logical block 15344, async page read
 ? __mutex_unlock_slowpath.constprop.0+0x1e0/0x1e0
 remove_and_add_spares+0x367/0x8a0 [md_mod]
 ? super_written+0x1c0/0x1c0 [md_mod]
 ? mutex_trylock+0xac/0x120
 ? _raw_spin_lock+0x72/0xc0
 ? _raw_spin_lock_bh+0xc0/0xc0
 md_check_recovery+0x848/0x960 [md_mod]
 raid10d+0xcf/0x3360 [raid10]
 ? sched_clock_cpu+0x185/0x1a0
 ? rb_erase+0x4d4/0x620
 ? var_wake_function+0xe0/0xe0
 ? psi_group_change+0x411/0x500
 ? preempt_count_sub+0xf/0xc0
 ? _raw_spin_lock_irqsave+0x78/0xc0
 ? __lock_text_start+0x18/0x18
 ? raid10_sync_request+0x36c0/0x36c0 [raid10]
 ? preempt_count_sub+0xf/0xc0
 ? _raw_spin_unlock_irqrestore+0x19/0x40
 ? del_timer_sync+0xa9/0x100
 ? try_to_del_timer_sync+0xc0/0xc0
 ? _raw_spin_lock_irqsave+0x78/0xc0
 ? __lock_text_start+0x18/0x18
 ? _raw_spin_unlock_irq+0x11/0x24
 ? __list_del_entry_valid+0x68/0xa0
 ? finish_wait+0xa3/0x100
 md_thread+0x161/0x260 [md_mod]
 ? unregister_md_personality+0xa0/0xa0 [md_mod]
 ? _raw_spin_lock_irqsave+0x78/0xc0
 ? prepare_to_wait_event+0x2c0/0x2c0
 ? unregister_md_personality+0xa0/0xa0 [md_mod]
 kthread+0x148/0x180
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x1f/0x30
 </TASK>

Allocated by task 124495:
 kasan_save_stack+0x1e/0x40
 __kasan_kmalloc+0x80/0xa0
 setup_conf+0x140/0x5c0 [raid10]
 raid10_run+0x4cd/0x740 [raid10]
 md_run+0x6f9/0x1300 [md_mod]
 raid_ctr+0x2531/0x4ac0 [dm_raid]
 dm_table_add_target+0x2b0/0x620 [dm_mod]
 table_load+0x1c8/0x400 [dm_mod]
 ctl_ioctl+0x29e/0x560 [dm_mod]
 dm_compat_ctl_ioctl+0x7/0x20 [dm_mod]
 __do_compat_sys_ioctl+0xfa/0x160
 do_syscall_64+0x90/0xc0
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

Last potentially related work creation:
 kasan_save_stack+0x1e/0x40
 __kasan_record_aux_stack+0x9e/0xc0
 kvfree_call_rcu+0x84/0x480
 timerfd_release+0x82/0x140
L __fput+0xfa/0x400
 task_work_run+0x80/0xc0
 exit_to_user_mode_prepare+0x155/0x160
 syscall_exit_to_user_mode+0x12/0x40
 do_syscall_64+0x42/0xc0
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

Second to last potentially related work creation:
 kasan_save_stack+0x1e/0x40
 __kasan_record_aux_stack+0x9e/0xc0
 kvfree_call_rcu+0x84/0x480
 timerfd_release+0x82/0x140
 __fput+0xfa/0x400
 task_work_run+0x80/0xc0
 exit_to_user_mode_prepare+0x155/0x160
 syscall_exit_to_user_mode+0x12/0x40
 do_syscall_64+0x42/0xc0
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

The buggy address belongs to the object at ffff889108f3d200
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 0 bytes to the right of
 256-byte region [ffff889108f3d200ffff889108f3d300)

The buggy address belongs to the physical page:
page:000000007ef2a34c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1108f3c
head:000000007ef2a34c order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=2)
raw: 4000000000010200 0000000000000000 dead000000000001 ffff889100042b40
raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff889108f3d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff889108f3d280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff889108f3d300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff889108f3d380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff889108f3d400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd-raid: destroy the bitmap after destroying the thread
Mikulas Patocka [Sun, 24 Jul 2022 18:26:12 +0000 (14:26 -0400)]
md-raid: destroy the bitmap after destroying the thread

When we ran the lvm test "shell/integrity-blocksize-3.sh" on a kernel with
kasan, we got failure in write_page.

The reason for the failure is that md_bitmap_destroy is called before
destroying the thread and the thread may be waiting in the function
write_page for the bio to complete. When the thread finishes waiting, it
executes "if (test_bit(BITMAP_WRITE_ERROR, &bitmap->flags))", which
triggers the kasan warning.

Note that the commit 48df498daf62 that caused this bug claims that it is
neede for md-cluster, you should check md-cluster and possibly find
another bugfix for it.

BUG: KASAN: use-after-free in write_page+0x18d/0x680 [md_mod]
Read of size 8 at addr ffff889162030c78 by task mdX_raid1/5539

CPU: 10 PID: 5539 Comm: mdX_raid1 Not tainted 5.19.0-rc2 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x34/0x44
 print_report.cold+0x45/0x57a
 ? __lock_text_start+0x18/0x18
 ? write_page+0x18d/0x680 [md_mod]
 kasan_report+0xa8/0xe0
 ? write_page+0x18d/0x680 [md_mod]
 kasan_check_range+0x13f/0x180
 write_page+0x18d/0x680 [md_mod]
 ? super_sync+0x4d5/0x560 [dm_raid]
 ? md_bitmap_file_kick+0xa0/0xa0 [md_mod]
 ? rs_set_dev_and_array_sectors+0x2e0/0x2e0 [dm_raid]
 ? mutex_trylock+0x120/0x120
 ? preempt_count_add+0x6b/0xc0
 ? preempt_count_sub+0xf/0xc0
 md_update_sb+0x707/0xe40 [md_mod]
 md_reap_sync_thread+0x1b2/0x4a0 [md_mod]
 md_check_recovery+0x533/0x960 [md_mod]
 raid1d+0xc8/0x2a20 [raid1]
 ? var_wake_function+0xe0/0xe0
 ? psi_group_change+0x411/0x500
 ? preempt_count_sub+0xf/0xc0
 ? _raw_spin_lock_irqsave+0x78/0xc0
 ? __lock_text_start+0x18/0x18
 ? raid1_end_read_request+0x2a0/0x2a0 [raid1]
 ? preempt_count_sub+0xf/0xc0
 ? _raw_spin_unlock_irqrestore+0x19/0x40
 ? del_timer_sync+0xa9/0x100
 ? try_to_del_timer_sync+0xc0/0xc0
 ? _raw_spin_lock_irqsave+0x78/0xc0
 ? __lock_text_start+0x18/0x18
 ? __list_del_entry_valid+0x68/0xa0
 ? finish_wait+0xa3/0x100
 md_thread+0x161/0x260 [md_mod]
 ? unregister_md_personality+0xa0/0xa0 [md_mod]
 ? _raw_spin_lock_irqsave+0x78/0xc0
 ? prepare_to_wait_event+0x2c0/0x2c0
 ? unregister_md_personality+0xa0/0xa0 [md_mod]
 kthread+0x148/0x180
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x1f/0x30
 </TASK>

Allocated by task 5522:
 kasan_save_stack+0x1e/0x40
 __kasan_kmalloc+0x80/0xa0
 md_bitmap_create+0xa8/0xe80 [md_mod]
 md_run+0x777/0x1300 [md_mod]
 raid_ctr+0x249c/0x4a30 [dm_raid]
 dm_table_add_target+0x2b0/0x620 [dm_mod]
 table_load+0x1c8/0x400 [dm_mod]
 ctl_ioctl+0x29e/0x560 [dm_mod]
 dm_compat_ctl_ioctl+0x7/0x20 [dm_mod]
 __do_compat_sys_ioctl+0xfa/0x160
 do_syscall_64+0x90/0xc0
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

Freed by task 5680:
 kasan_save_stack+0x1e/0x40
 kasan_set_track+0x21/0x40
 kasan_set_free_info+0x20/0x40
 __kasan_slab_free+0xf7/0x140
 kfree+0x80/0x240
 md_bitmap_free+0x1c3/0x280 [md_mod]
 __md_stop+0x21/0x120 [md_mod]
 md_stop+0x9/0x40 [md_mod]
 raid_dtr+0x1b/0x40 [dm_raid]
 dm_table_destroy+0x98/0x1e0 [dm_mod]
 __dm_destroy+0x199/0x360 [dm_mod]
 dev_remove+0x10c/0x160 [dm_mod]
 ctl_ioctl+0x29e/0x560 [dm_mod]
 dm_compat_ctl_ioctl+0x7/0x20 [dm_mod]
 __do_compat_sys_ioctl+0xfa/0x160
 do_syscall_64+0x90/0xc0
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 48df498daf62 ("md: move bitmap_destroy to the beginning of __md_stop")
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: return the allocated devices from md_alloc
Christoph Hellwig [Sat, 23 Jul 2022 06:24:29 +0000 (08:24 +0200)]
md: return the allocated devices from md_alloc

Two callers of md_alloc want to use the newly allocated devices, so
return it instead of letting them find it cumbersomely after the
allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-and-tested-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: open code md_probe in autorun_devices
Christoph Hellwig [Sat, 23 Jul 2022 06:24:28 +0000 (08:24 +0200)]
md: open code md_probe in autorun_devices

autorun_devices should not be limited to the controls for the legacy
probe on open, so just call md_alloc directly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-and-tested-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: remove unneeded semicolon
Yang Li [Fri, 22 Jul 2022 00:27:55 +0000 (08:27 +0800)]
md: remove unneeded semicolon

Eliminate the following coccicheck warning:
./drivers/md/md.c:8208:2-3: Unneeded semicolon

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoremove the sx8 block driver
Christoph Hellwig [Thu, 21 Jul 2022 06:41:02 +0000 (08:41 +0200)]
remove the sx8 block driver

This driver is for fairly obscure hardware, and has only seen random
drive-by changes after the maintainer stopped working on it in 2005
(about a year and a half after it was introduced).  It has some
"interesting" block layer interactions, so let's just drop it unless
anyone complains.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220721064102.1715460-1-hch@lst.de
[axboe: fix date typo, it was in 2005, not 2015]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: fix build failure for !MODULE
Stephen Rothwell [Thu, 21 Jul 2022 03:11:32 +0000 (13:11 +1000)]
md: fix build failure for !MODULE

After merging the block tree, today's linux-next build (x86_64
allmodconfig) failed like this:

drivers/md/md.c:717:22: error: 'mddev_find' defined but not used [-Werror=unused-function]
  717 | static struct mddev *mddev_find(dev_t unit)
      |                      ^~~~~~~~~~
cc1: all warnings being treated as errors

Caused by commit

  4500d5c17910 ("md: simplify md_open")

Make mddev_find() available only for non-modular builds.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220721131132.070be166@canb.auug.org.au
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoraid5: fix duplicate checks for rdev->saved_raid_disk
Jackie Liu [Thu, 7 Jul 2022 09:08:34 +0000 (17:08 +0800)]
raid5: fix duplicate checks for rdev->saved_raid_disk

'first' will always be greater than or equal to 0, it is unnecessary to
repeat the 0 check, clean it up.

Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: simplify md_open
Christoph Hellwig [Tue, 19 Jul 2022 09:18:24 +0000 (11:18 +0200)]
md: simplify md_open

Now that devices are on the all_mddevs list until the gendisk is freed,
there can't be any duplicates.  Remove the global list lookup and just
grab a reference.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: only delete entries from all_mddevs when the disk is freed
Christoph Hellwig [Tue, 19 Jul 2022 09:18:23 +0000 (11:18 +0200)]
md: only delete entries from all_mddevs when the disk is freed

This ensures device names don't get prematurely reused.  Instead add a
deleted flag to skip already deleted devices in mddev_get and other
places that only want to see live mddevs.

Reported-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: stop using for_each_mddev in md_exit
Christoph Hellwig [Tue, 19 Jul 2022 09:18:22 +0000 (11:18 +0200)]
md: stop using for_each_mddev in md_exit

Just do a simple list_for_each_entry_safe on all_mddevs, and only grab a
reference when we drop the lock and delete the now unused for_each_mddev
macro.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: stop using for_each_mddev in md_notify_reboot
Christoph Hellwig [Tue, 19 Jul 2022 09:18:21 +0000 (11:18 +0200)]
md: stop using for_each_mddev in md_notify_reboot

Just do a simple list_for_each_entry_safe on all_mddevs, and only grab a
reference when we drop the lock.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: stop using for_each_mddev in md_do_sync
Christoph Hellwig [Tue, 19 Jul 2022 09:18:20 +0000 (11:18 +0200)]
md: stop using for_each_mddev in md_do_sync

Just do a plain list_for_each that only grabs a mddev reference in
the case where the thread sleeps and restarts the list iteration.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: factor out the rdev overlaps check from rdev_size_store
Christoph Hellwig [Tue, 19 Jul 2022 09:18:19 +0000 (11:18 +0200)]
md: factor out the rdev overlaps check from rdev_size_store

This splits the code into nicely readable chunks and also avoids
the refcount inc/dec manipulations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: rename md_free to md_kobj_release
Christoph Hellwig [Tue, 19 Jul 2022 09:18:18 +0000 (11:18 +0200)]
md: rename md_free to md_kobj_release

The md_free name is rather misleading, so pick a better one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: implement ->free_disk
Christoph Hellwig [Tue, 19 Jul 2022 09:18:17 +0000 (11:18 +0200)]
md: implement ->free_disk

Ensure that all private data is only freed once all accesses are done.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: fix error handling in md_alloc
Christoph Hellwig [Tue, 19 Jul 2022 09:18:16 +0000 (11:18 +0200)]
md: fix error handling in md_alloc

Error handling in md_alloc is a mess.  Untangle it to just free the mddev
directly before add_disk is called and thus the gendisk is globally
visible.  After that clear the hold flag and let the mddev_put take care
of cleaning up the mddev through the usual mechanisms.

Fixes: 5e55e2f5fc95 ("[PATCH] md: convert compile time warnings into runtime warnings")
Fixes: 9be68dd7ac0e ("md: add error handling support for add_disk()")
Fixes: 7ad1069166c0 ("md: properly unwind when failing to add the kobject in md_alloc")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd: fix mddev->kobj lifetime
Christoph Hellwig [Tue, 19 Jul 2022 09:18:15 +0000 (11:18 +0200)]
md: fix mddev->kobj lifetime

Once a kobject is initialized, the containing object should not be
directly freed.  So delay initialization until it is added.  Also
remove the kobject_del call as the last put will remove the kobject as
well.  The explicitly delete isn't needed here, and dropping it will
simplify further fixes.

With this md_free now does not need to check that ->gendisk is non-NULL
as it is always set by the time that kobject_init is called on
mddev->kobj.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd/raid5: Convert prepare_to_wait() to wait_woken() api
Logan Gunthorpe [Thu, 7 Jul 2022 19:15:33 +0000 (13:15 -0600)]
md/raid5: Convert prepare_to_wait() to wait_woken() api

raid5_get_active_stripe() can sleep in various situations and it
is called by make_stripe_request() while inside the
prepare_to_wait()/finish_wait() section. Nested waits like this are
not supported.

This was noticed while making other changes that add different sleeps
to raid5_get_active_stripe() that caused a WARNING with
CONFIG_DEBUG_ATOMIC_SLEEP.

No ill effects have been noticed with the code as is, but theoretically
a nested and here could cause a dead lock so it should be fixed.

To fix this, convert the prepare_to_wait() call to use wake_woken()
which supports nested sleeps.

Link: https://lwn.net/Articles/628628/
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agomd/raid5: Fix sectors_to_do bitmap overflow in raid5_make_request()
Logan Gunthorpe [Thu, 7 Jul 2022 19:15:32 +0000 (13:15 -0600)]
md/raid5: Fix sectors_to_do bitmap overflow in raid5_make_request()

For unaligned IO that have nearly maximum sectors, the number of stripes
will end up being one greater than the size of the bitmap. When this
happens, the last stripe in the IO will not be processed as it should
be, resulting in data corruption.

However, this is not normally seen when the backing block devices have
4K physical block sizes since the block layer will split the request
before that happens.

To fix this increase the bitmap size by one bit and ensure the full
number of stripes are checked when calling find_first_bit().

Reported-by: David Sloan <David.Sloan@eideticom.com>
Fixes: 7e55c60acfbb ("md/raid5: Pivot raid5_make_request()")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agobcache: remove EXPERIMENTAL for Kconfig option 'Asynchronous device registration'
Coly Li [Tue, 19 Jul 2022 04:27:24 +0000 (12:27 +0800)]
bcache: remove EXPERIMENTAL for Kconfig option 'Asynchronous device registration'

The "Asynchronous device registration (EXPERIMENTAL)" Kconfig option is
for 2+ years, it is used when registration takes too much time for
massive amount of cached data, to avoid udev task timeout during boot
time.

Many users and products enable this Kconfig option for quite long time
(e.g. SUSE Linux) and it works as expected and no issue reported.

It is time to remove the "EXPERIMENTAL" tag from this Kconfig item.

Signed-off-by: Coly Li <colyli@suse.de>
Link: https://lore.kernel.org/r/20220719042724.8498-2-colyli@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonbd: add missing definition of pr_fmt
Yu Kuai [Sat, 23 Jul 2022 08:24:27 +0000 (16:24 +0800)]
nbd: add missing definition of pr_fmt

commit 1243172d5894 ("nbd: use pr_err to output error message") tries
to define pr_fmt and use short pr_err() to output error message,
however, the definition is missed.

This patch also remove existing "nbd:" inside pr_err().

Fixes: 1243172d5894 ("nbd: use pr_err to output error message")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/r/20220723082427.3890655-1-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonull_blk: fix ida error handling in null_add_dev()
Dan Carpenter [Fri, 15 Jul 2022 08:12:14 +0000 (11:12 +0300)]
null_blk: fix ida error handling in null_add_dev()

There needs to be some error checking if ida_simple_get() fails.
Also call ida_free() if there are errors later.

Fixes: 94bc02e30fb8 ("nullb: use ida to manage index")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YtEhXsr6vJeoiYhd@kili
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-multipath: refactor nvme_mpath_add_disk
Joel Granados [Tue, 28 Jun 2022 19:10:15 +0000 (21:10 +0200)]
nvme-multipath: refactor nvme_mpath_add_disk

Pass anagrpid as second argument. This is prep patch that allows reusing
this function for supporting unknown command sets.

Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-apple: use nvme core helper to cancel requests in tagset
Guixin Liu [Fri, 8 Jul 2022 03:06:05 +0000 (11:06 +0800)]
nvme-apple: use nvme core helper to cancel requests in tagset

Use nvme core helper nvme_cancel_tagset and nvme_cancel_admin_tagset
instead of same logic code.

Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Ruozhu Li <liruozhu@huawei.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-pci: use nvme core helper to cancel requests in tagset
Guixin Liu [Fri, 8 Jul 2022 03:04:37 +0000 (11:04 +0800)]
nvme-pci: use nvme core helper to cancel requests in tagset

Use nvme core helper nvme_cancel_tagset and nvme_cancel_admin_tagset
instead of same logic code.

Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Ruozhu Li <liruozhu@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-tcp: use in-capsule data for I/O connect
Caleb Sander [Thu, 7 Jul 2022 21:12:45 +0000 (15:12 -0600)]
nvme-tcp: use in-capsule data for I/O connect

Currently, command data is only sent in-capsule on the for admin or I/O
commands on queues that indicate support for it.  Send fabrics command
data in-capsule for I/O queues as well to avoid needing a separate
H2CData PDU for the connect command.

This is optimization. Without this change, we send the connect command
capsule and data in separate PDUs (CapsuleCmd and H2CData), and must wait
for the controller to respond with an R2T PDU before sending the H2CData.

With the change, we send a single CapsuleCmd PDU that includes the data.
This reduces the number of bytes (and likely packets) sent across the network,
and simplifies the send state machine handling in the driver.

Signed-off-by: Caleb Sander <csander@purestorage.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonvme-rdma: remove timeout for getting RDMA-CM established event
Israel Rukshin [Sun, 15 May 2022 15:04:40 +0000 (18:04 +0300)]
nvme-rdma: remove timeout for getting RDMA-CM established event

In case many controllers start error recovery at the same time (i.e.,
when port is down and up), they may never succeed to reconnect again.
This is because the target can't handle all the connect requests at
three seconds (the arbitrary value set today). Even if some of the
connections are established, when a single queue fails to connect,
all the controller's queues are destroyed as well. So, on the
following reconnection attempts the number of connect requests may
remain the same. To fix this, remove the timeout and wait for RDMA-CM
event to abort/complete the connect request. RDMA-CM sends unreachable
event when a timeout of ~90 seconds is expired. This approach is used
at other RDMA-CM users like SRP and iSER at blocking mode. The commit
also renames NVME_RDMA_CONNECT_TIMEOUT_MS to NVME_RDMA_CM_TIMEOUT_MS.

Signed-off-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonull_blk: add configfs variables for 2 options
Vincent Fu [Fri, 8 Jul 2022 17:49:49 +0000 (17:49 +0000)]
null_blk: add configfs variables for 2 options

Allow setting via configfs these two options:

no_sched
shared_tag_bitmap

Previously these could only be activated as module parameters.

Still missing are:

shared_tags
timeout
requeue
init_hctx

Signed-off-by: Vincent Fu <vincent.fu@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220708174943.87787-3-vincent.fu@samsung.com
[axboe: fold in nullb == NULL fix]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agonull_blk: add module parameters for 4 options
Vincent Fu [Fri, 8 Jul 2022 17:49:49 +0000 (17:49 +0000)]
null_blk: add module parameters for 4 options

Add as module parameters these options:

memory_backed
discard
mbps
cache_size

Previously these could only be set via configfs.

Still missing is bad_blocks.

The kernel test robot found a documentation formatting issue in v1 of
this patch.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Vincent Fu <vincent.fu@samsung.com>
Link: https://lore.kernel.org/r/20220708174943.87787-2-vincent.fu@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>