Merge tag 'v6.6.80' into for/openbmc/dev-6.6

This is the 6.6.80 stable release

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Merge tag 'v6.6.80' into for/openbmc/dev-6.6

This is the 6.6.80 stable release

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# gpg: Good signature from "Greg Kroah-Hartman <gregkh@kernel.org>" [marginal]
# gpg: gregkh@kernel.org: Verified 9 signatures in the past 5 weeks. Encrypted
# 0 messages.
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# Primary key fingerprint: 647F 2865 4894 E3BD 4571 99BE 38DB BDC8 6092 693E

show more ...

md/md-bitmap: Synchronize bitmap_get_stats() with bitmap lifetime

[ Upstream commit 8d28d0ddb986f56920ac97ae704cc3340a699a30 ]

After commit ec6bb299c7c3 ("md/md-bitmap: add 'sync_size' into struct

md/md-bitmap: Synchronize bitmap_get_stats() with bitmap lifetime

[ Upstream commit 8d28d0ddb986f56920ac97ae704cc3340a699a30 ]

After commit ec6bb299c7c3 ("md/md-bitmap: add 'sync_size' into struct
md_bitmap_stats"), following panic is reported:

Oops: general protection fault, probably for non-canonical address
RIP: 0010:bitmap_get_stats+0x2b/0xa0
Call Trace:
<TASK>
md_seq_show+0x2d2/0x5b0
seq_read_iter+0x2b9/0x470
seq_read+0x12f/0x180
proc_reg_read+0x57/0xb0
vfs_read+0xf6/0x380
ksys_read+0x6c/0xf0
do_syscall_64+0x82/0x170
entry_SYSCALL_64_after_hwframe+0x76/0x7e

Root cause is that bitmap_get_stats() can be called at anytime if mddev
is still there, even if bitmap is destroyed, or not fully initialized.
Deferenceing bitmap in this case can crash the kernel. Meanwhile, the
above commit start to deferencing bitmap->storage, make the problem
easier to trigger.

Fix the problem by protecting bitmap_get_stats() with bitmap_info.mutex.

Cc: stable@vger.kernel.org # v6.12+
Fixes: 32a7627cf3a3 ("[PATCH] md: optimised resync using Bitmap based intent logging")
Reported-and-tested-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Closes: https://lore.kernel.org/linux-raid/ca3a91a2-50ae-4f68-b317-abd9889f3907@oracle.com/T/#m6e5086c95201135e4941fe38f9efa76daf9666c5
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20250124092055.4050195-1-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

md/md-bitmap: add 'sync_size' into struct md_bitmap_stats

[ Upstream commit ec6bb299c7c3dd4ca1724d13d5f5fae3ee54fc65 ]

To avoid dereferencing bitmap directly in md-cluster to prepare
inventing a ne

md/md-bitmap: add 'sync_size' into struct md_bitmap_stats

[ Upstream commit ec6bb299c7c3dd4ca1724d13d5f5fae3ee54fc65 ]

To avoid dereferencing bitmap directly in md-cluster to prepare
inventing a new bitmap.

BTW, also fix following checkpatch warnings:

WARNING: Deprecated use of 'kmap_atomic', prefer 'kmap_local_page' instead
WARNING: Deprecated use of 'kunmap_atomic', prefer 'kunmap_local' instead

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20240826074452.1490072-7-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
Stable-dep-of: 8d28d0ddb986 ("md/md-bitmap: Synchronize bitmap_get_stats() with bitmap lifetime")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

md/md-bitmap: replace md_bitmap_status() with a new helper md_bitmap_get_stats()

[ Upstream commit 38f287d7e495ae00d4481702f44ff7ca79f5c9bc ]

There are no functional changes, and the new helper wil

md/md-bitmap: replace md_bitmap_status() with a new helper md_bitmap_get_stats()

[ Upstream commit 38f287d7e495ae00d4481702f44ff7ca79f5c9bc ]

There are no functional changes, and the new helper will be used in
multiple places in following patches to avoid dereferencing bitmap
directly.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20240826074452.1490072-3-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
Stable-dep-of: 8d28d0ddb986 ("md/md-bitmap: Synchronize bitmap_get_stats() with bitmap lifetime")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

Merge tag 'v6.6.79' into for/openbmc/dev-6.6

This is the 6.6.79 stable release

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Merge tag 'v6.6.79' into for/openbmc/dev-6.6

This is the 6.6.79 stable release

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# gpg: gregkh@kernel.org: Verified 8 signatures in the past 4 weeks. Encrypted
# 0 messages.
# gpg: Warning: you have yet to encrypt a message to this key!
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 647F 2865 4894 E3BD 4571 99BE 38DB BDC8 6092 693E

show more ...

md/md-bitmap: move bitmap_{start, end}write to md upper layer

commit cd5fc653381811f1e0ba65f5d169918cab61476f upstream.

There are two BUG reports that raid5 will hang at
bitmap_startwrite([1],[2]),

md/md-bitmap: move bitmap_{start, end}write to md upper layer

commit cd5fc653381811f1e0ba65f5d169918cab61476f upstream.

There are two BUG reports that raid5 will hang at
bitmap_startwrite([1],[2]), root cause is that bitmap start write and end
write is unbalanced, it's not quite clear where, and while reviewing raid5
code, it's found that bitmap operations can be optimized. For example,
for a 4 disks raid5, with chunksize=8k, if user issue a IO (0 + 48k) to
the array:

┌────────────────────────────────────────────────────────────┐
│chunk 0 │
│ ┌────────────┬─────────────┬─────────────┬────────────┼
│ sh0 │A0: 0 + 4k │A1: 8k + 4k │A2: 16k + 4k │A3: P │
│ ┼────────────┼─────────────┼─────────────┼────────────┼
│ sh1 │B0: 4k + 4k │B1: 12k + 4k │B2: 20k + 4k │B3: P │
┼──────┴────────────┴─────────────┴─────────────┴────────────┼
│chunk 1 │
│ ┌────────────┬─────────────┬─────────────┬────────────┤
│ sh2 │C0: 24k + 4k│C1: 32k + 4k │C2: P │C3: 40k + 4k│
│ ┼────────────┼─────────────┼─────────────┼────────────┼
│ sh3 │D0: 28k + 4k│D1: 36k + 4k │D2: P │D3: 44k + 4k│
└──────┴────────────┴─────────────┴─────────────┴────────────┘

Before this patch, 4 stripe head will be used, and each sh will attach
bio for 3 disks, and each attached bio will trigger
bitmap_startwrite() once, which means total 12 times.
- 3 times (0 + 4k), for (A0, A1 and A2)
- 3 times (4 + 4k), for (B0, B1 and B2)
- 3 times (8 + 4k), for (C0, C1 and C3)
- 3 times (12 + 4k), for (D0, D1 and D3)

After this patch, md upper layer will calculate that IO range (0 + 48k)
is corresponding to the bitmap (0 + 16k), and call bitmap_startwrite()
just once.

Noted that this patch will align bitmap ranges to the chunks, for example,
if user issue a IO (0 + 4k) to array:

- Before this patch, 1 time (0 + 4k), for A0;
- After this patch, 1 time (0 + 8k) for chunk 0;

Usually, one bitmap bit will represent more than one disk chunk, and this
doesn't have any difference. And even if user really created a array
that one chunk contain multiple bits, the overhead is that more data
will be recovered after power failure.

Also remove STRIPE_BITMAP_PENDING since it's not used anymore.

[1] https://lore.kernel.org/all/CAJpMwyjmHQLvm6zg1cmQErttNNQPDAAXPKM3xgTjMhbfts986Q@mail.gmail.com/
[2] https://lore.kernel.org/all/ADF7D720-5764-4AF3-B68E-1845988737AA@flyingcircus.io/

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20250109015145.158868-6-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
[There is no bitmap_operations, resolve conflicts by replacing
bitmap_ops->{startwrite, endwrite} with md_bitmap_{startwrite, endwrite}]
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

md/md-bitmap: remove the last parameter for bimtap_ops->endwrite()

commit 4f0e7d0e03b7b80af84759a9e7cfb0f81ac4adae upstream.

For the case that IO failed for one rdev, the bit will be mark as NEEDED

md/md-bitmap: remove the last parameter for bimtap_ops->endwrite()

commit 4f0e7d0e03b7b80af84759a9e7cfb0f81ac4adae upstream.

For the case that IO failed for one rdev, the bit will be mark as NEEDED
in following cases:

1) If badblocks is set and rdev is not faulty;
2) If rdev is faulty;

Case 1) is useless because synchronize data to badblocks make no sense.
Case 2) can be replaced with mddev->degraded.

Also remove R1BIO_Degraded, R10BIO_Degraded and STRIPE_DEGRADED since
case 2) no longer use them.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20250109015145.158868-3-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
[ Resolve minor conflicts ]
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

md/md-bitmap: factor behind write counters out from bitmap_{start/end}write()

commit 08c50142a128dcb2d7060aa3b4c5db8837f7a46a upstream.

behind_write is only used in raid1, prepare to refactor
bitma

md/md-bitmap: factor behind write counters out from bitmap_{start/end}write()

commit 08c50142a128dcb2d7060aa3b4c5db8837f7a46a upstream.

behind_write is only used in raid1, prepare to refactor
bitmap_{start/end}write(), there are no functional changes.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Xiao Ni <xni@redhat.com>
Link: https://lore.kernel.org/r/20250109015145.158868-2-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
[There is no bitmap_operations, resolve conflicts by exporting new api
md_bitmap_{start,end}_behind_write]
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

Merge tag 'v6.6.64' into for/openbmc/dev-6.6

This is the 6.6.64 stable release

md/md-bitmap: Add missing destroy_work_on_stack()

commit 6012169e8aae9c0eda38bbedcd7a1540a81220ae upstream.

This commit add missed destroy_work_on_stack() operations for
unplug_work.work in bitmap_

md/md-bitmap: Add missing destroy_work_on_stack()

commit 6012169e8aae9c0eda38bbedcd7a1540a81220ae upstream.

This commit add missed destroy_work_on_stack() operations for
unplug_work.work in bitmap_unplug_async().

Fixes: a022325ab970 ("md/md-bitmap: add a new helper to unplug bitmap asynchrously")
Cc: stable@vger.kernel.org
Signed-off-by: Yuan Can <yuancan@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20241105130105.127336-1-yuancan@huawei.com
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

Merge tag 'v6.6.44' into for/openbmc/dev-6.6

This is the 6.6.44 stable release

md/md-bitmap: fix writing non bitmap pages

commit ab99a87542f194f28e2364a42afbf9fb48b1c724 upstream.

__write_sb_page() rounds up the io size to the optimal io size if it
doesn't exceed the data off

md/md-bitmap: fix writing non bitmap pages

commit ab99a87542f194f28e2364a42afbf9fb48b1c724 upstream.

__write_sb_page() rounds up the io size to the optimal io size if it
doesn't exceed the data offset, but it doesn't check the final size
exceeds the bitmap length.

For example:
page count - 1
page size - 4K
data offset - 1M
optimal io size - 256K

The final io size would be 256K (64 pages) but md_bitmap_storage_alloc()
allocated 1 page, the IO would write 1 valid page and 63 pages that
happens to be allocated afterwards. This leaks memory to the raid device
superblock.

This issue caused a data transfer failure in nvme-tcp. The network
drivers checks the first page of an IO with sendpage_ok(), it returns
true if the page isn't a slabpage and refcount >= 1. If the page
!sendpage_ok() the network driver disables MSG_SPLICE_PAGES.

As of now the network layer assumes all the pages of the IO are
sendpage_ok() when MSG_SPLICE_PAGES is on.

The bitmap pages aren't slab pages, the first page of the IO is
sendpage_ok(), but the additional pages that happens to be allocated
after the bitmap pages might be !sendpage_ok(). That cause
skb_splice_from_iter() to stop the data transfer, in the case below it
hangs 'mdadm --create'.

The bug is reproducible, in order to reproduce we need nvme-over-tcp
controllers with optimal IO size bigger than PAGE_SIZE. Creating a raid
with bitmap over those devices reproduces the bug.

In order to simulate large optimal IO size you can use dm-stripe with a
single device.
Script to reproduce the issue on top of brd devices using dm-stripe is
attached below (will be added to blktest).

I have added some logs to test the theory:
...
md: created bitmap (1 pages) for device md127
__write_sb_page before md_super_write offset: 16, size: 262144. pfn: 0x53ee
=== __write_sb_page before md_super_write. logging pages ===
pfn: 0x53ee, slab: 0 <-- the only page that allocated for the bitmap
pfn: 0x53ef, slab: 1
pfn: 0x53f0, slab: 0
pfn: 0x53f1, slab: 0
pfn: 0x53f2, slab: 0
pfn: 0x53f3, slab: 1
...
nvme_tcp: sendpage_ok - pfn: 0x53ee, len: 262144, offset: 0
skbuff: before sendpage_ok() - pfn: 0x53ee
skbuff: before sendpage_ok() - pfn: 0x53ef
WARNING at net/core/skbuff.c:6848 skb_splice_from_iter+0x142/0x450
skbuff: !sendpage_ok - pfn: 0x53ef. is_slab: 1, page_count: 1
...

Cc: stable@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ofir Gal <ofir.gal@volumez.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240607072748.3182199-1-ofir.gal@volumez.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...

Merge tag 'v6.6.33' into dev-6.6

This is the 6.6.33 stable release

md: fix resync softlockup when bitmap size is less than array size

[ Upstream commit f0e729af2eb6bee9eb58c4df1087f14ebaefe26b ]

Is is reported that for dm-raid10, lvextend + lvchange --syncaction w

md: fix resync softlockup when bitmap size is less than array size

[ Upstream commit f0e729af2eb6bee9eb58c4df1087f14ebaefe26b ]

Is is reported that for dm-raid10, lvextend + lvchange --syncaction will
trigger following softlockup:

kernel:watchdog: BUG: soft lockup - CPU#3 stuck for 26s! [mdX_resync:6976]
CPU: 7 PID: 3588 Comm: mdX_resync Kdump: loaded Not tainted 6.9.0-rc4-next-20240419 #1
RIP: 0010:_raw_spin_unlock_irq+0x13/0x30
Call Trace:
<TASK>
md_bitmap_start_sync+0x6b/0xf0
raid10_sync_request+0x25c/0x1b40 [raid10]
md_do_sync+0x64b/0x1020
md_thread+0xa7/0x170
kthread+0xcf/0x100
ret_from_fork+0x30/0x50
ret_from_fork_asm+0x1a/0x30

And the detailed process is as follows:

md_do_sync
j = mddev->resync_min
while (j < max_sectors)
sectors = raid10_sync_request(mddev, j, &skipped)
if (!md_bitmap_start_sync(..., &sync_blocks))
// md_bitmap_start_sync set sync_blocks to 0
return sync_blocks + sectors_skippe;
// sectors = 0;
j += sectors;
// j never change

Root cause is that commit 301867b1c168 ("md/raid10: check
slab-out-of-bounds in md_bitmap_get_counter") return early from
md_bitmap_get_counter(), without setting returned blocks.

Fix this problem by always set returned blocks from
md_bitmap_get_counter"(), as it used to be.

Noted that this patch just fix the softlockup problem in kernel, the
case that bitmap size doesn't match array size still need to be fixed.

Fixes: 301867b1c168 ("md/raid10: check slab-out-of-bounds in md_bitmap_get_counter")
Reported-and-tested-by: Nigel Croxon <ncroxon@redhat.com>
Closes: https://lore.kernel.org/all/71ba5272-ab07-43ba-8232-d2da642acb4e@redhat.com/
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20240422065824.2516-1-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...

Merge tag 'v6.6.24' into dev-6.6

This is the 6.6.24 stable release

md/md-bitmap: fix incorrect usage for sb_index

[ Upstream commit ecbd8ebb51bf7e4939d83b9e6022a55cac44ef06 ]

Commit d7038f951828 ("md-bitmap: don't use ->index for pages backing the
bitmap file") re

md/md-bitmap: fix incorrect usage for sb_index

[ Upstream commit ecbd8ebb51bf7e4939d83b9e6022a55cac44ef06 ]

Commit d7038f951828 ("md-bitmap: don't use ->index for pages backing the
bitmap file") removed page->index from bitmap code, but left wrong code
logic for clustered-md. current code never set slot offset for cluster
nodes, will sometimes cause crash in clustered env.

Call trace (partly):
md_bitmap_file_set_bit+0x110/0x1d8 [md_mod]
md_bitmap_startwrite+0x13c/0x240 [md_mod]
raid1_make_request+0x6b0/0x1c08 [raid1]
md_handle_request+0x1dc/0x368 [md_mod]
md_submit_bio+0x80/0xf8 [md_mod]
__submit_bio+0x178/0x300
submit_bio_noacct_nocheck+0x11c/0x338
submit_bio_noacct+0x134/0x614
submit_bio+0x28/0xdc
submit_bh_wbc+0x130/0x1cc
submit_bh+0x1c/0x28

Fixes: d7038f951828 ("md-bitmap: don't use ->index for pages backing the bitmap file")
Cc: stable@vger.kernel.org # v6.6+
Signed-off-by: Heming Zhao <heming.zhao@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20240223121128.28985-1-heming.zhao@suse.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Merge drm/drm-fixes into drm-misc-fixes

Forwarding to v6.6-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge branch 'next' into for-linus

Prepare input updates for 6.6 merge window.

Merge tag 'md-next-20230814-resend' into loongarch-next

LoongArch architecture changes for 6.5 (raid5/6 optimization) depend on
the md changes to fix build and work, so merge them to create a base.

Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux

Pull block updates from Jens Axboe:
"Pretty quiet round for this release. This contains:

- Add support for zoned storage to ubl

Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux

Pull block updates from Jens Axboe:
"Pretty quiet round for this release. This contains:

- Add support for zoned storage to ublk (Andreas, Ming)

- Series improving performance for drivers that mark themselves as
needing a blocking context for issue (Bart)

- Cleanup the flush logic (Chengming)

- sed opal keyring support (Greg)

- Fixes and improvements to the integrity support (Jinyoung)

- Add some exports for bcachefs that we can hopefully delete again in
the future (Kent)

- deadline throttling fix (Zhiguo)

- Series allowing building the kernel without buffer_head support
(Christoph)

- Sanitize the bio page adding flow (Christoph)

- Write back cache fixes (Christoph)

- MD updates via Song:
- Fix perf regression for raid0 large sequential writes (Jan)
- Fix split bio iostat for raid0 (David)
- Various raid1 fixes (Heinz, Xueshi)
- raid6test build fixes (WANG)
- Deprecate bitmap file support (Christoph)
- Fix deadlock with md sync thread (Yu)
- Refactor md io accounting (Yu)
- Various non-urgent fixes (Li, Yu, Jack)

- Various fixes and cleanups (Arnd, Azeem, Chengming, Damien, Li,
Ming, Nitesh, Ruan, Tejun, Thomas, Xu)"

* tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux: (113 commits)
block: use strscpy() to instead of strncpy()
block: sed-opal: keyring support for SED keys
block: sed-opal: Implement IOC_OPAL_REVERT_LSP
block: sed-opal: Implement IOC_OPAL_DISCOVERY
blk-mq: prealloc tags when increase tagset nr_hw_queues
blk-mq: delete redundant tagset map update when fallback
blk-mq: fix tags leak when shrink nr_hw_queues
ublk: zoned: support REQ_OP_ZONE_RESET_ALL
md: raid0: account for split bio in iostat accounting
md/raid0: Fix performance regression for large sequential writes
md/raid0: Factor out helper for mapping and submitting a bio
md raid1: allow writebehind to work on any leg device set WriteMostly
md/raid1: hold the barrier until handle_read_error() finishes
md/raid1: free the r1bio before waiting for blocked rdev
md/raid1: call free_r1bio() before allow_barrier() in raid_end_bio_io()
blk-cgroup: Fix NULL deref caused by blkg_policy_data being installed before init
drivers/rnbd: restore sysfs interface to rnbd-client
md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()
raid6: test: only check for Altivec if building on powerpc hosts
raid6: test: make sure all intermediate and artifact files are .gitignored
...

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Merge drm/drm-next into drm-intel-next

Catching-up with drm-next and drm-intel-gt-next.
It will unblock a code refactor around the platform
definitions (names vs acronyms).

Signed-off-by: Rodrigo V

Merge drm/drm-next into drm-intel-next

Catching-up with drm-next and drm-intel-gt-next.
It will unblock a code refactor around the platform
definitions (names vs acronyms).

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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Merge drm/drm-next into drm-intel-gt-next

Need to pull in b3e4aae612ec ("drm/i915/hdcp: Modify hdcp_gsc_message msg sending mechanism") as
a dependency for https://patchwork.freedesktop.org/series/1

Merge drm/drm-next into drm-intel-gt-next

Need to pull in b3e4aae612ec ("drm/i915/hdcp: Modify hdcp_gsc_message msg sending mechanism") as
a dependency for https://patchwork.freedesktop.org/series/121735/

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

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Merge tag 'md-next-20230729' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into for-6.6/block

Pull MD updates from Song:

"1. Deprecate bitmap file support, by Christoph Hellwig;
2. Fi

Merge tag 'md-next-20230729' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into for-6.6/block

Pull MD updates from Song:

"1. Deprecate bitmap file support, by Christoph Hellwig;
2. Fix deadlock with md sync thread, by Yu Kuai;
3. Refactor md io accounting, by Yu Kuai;
4. Various non-urgent fixes by Li Nan, Yu Kuai, and Jack Wang."

* tag 'md-next-20230729' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md: (36 commits)
md/md-bitmap: hold 'reconfig_mutex' in backlog_store()
md/md-bitmap: remove unnecessary local variable in backlog_store()
md/raid10: use dereference_rdev_and_rrdev() to get devices
md/raid10: factor out dereference_rdev_and_rrdev()
md/raid10: check replacement and rdev to prevent submit the same io twice
md/raid1: Avoid lock contention from wake_up()
md: restore 'noio_flag' for the last mddev_resume()
md: don't quiesce in mddev_suspend()
md: remove redundant check in fix_read_error()
md/raid10: optimize fix_read_error
md/raid1: prioritize adding disk to 'removed' mirror
md/md-faulty: enable io accounting
md/md-linear: enable io accounting
md/md-multipath: enable io accounting
md/raid10: switch to use md_account_bio() for io accounting
md/raid1: switch to use md_account_bio() for io accounting
raid5: fix missing io accounting in raid5_align_endio()
md: also clone new io if io accounting is disabled
md: move initialization and destruction of 'io_acct_set' to md.c
md: deprecate bitmap file support
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md/md-bitmap: hold 'reconfig_mutex' in backlog_store()

Several reasons why 'reconfig_mutex' should be held:

1) rdev_for_each() is not safe to be called without the lock, because
rdev can be remo

md/md-bitmap: hold 'reconfig_mutex' in backlog_store()

Several reasons why 'reconfig_mutex' should be held:

1) rdev_for_each() is not safe to be called without the lock, because
rdev can be removed concurrently.
2) mddev_destroy_serial_pool() and mddev_create_serial_pool() should not
be called concurrently.
3) mddev_suspend() from mddev_destroy/create_serial_pool() should be
protected by the lock.

Fixes: 10c92fca636e ("md-bitmap: create and destroy wb_info_pool with the change of backlog")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20230706083727.608914-3-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>

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md/md-bitmap: remove unnecessary local variable in backlog_store()

Local variable is definied first in the beginning of backlog_store(),
there is no need to define it again.

Fixes: 8c13ab115b57 ("m

md/md-bitmap: remove unnecessary local variable in backlog_store()

Local variable is definied first in the beginning of backlog_store(),
there is no need to define it again.

Fixes: 8c13ab115b57 ("md/bitmap: don't set max_write_behind if there is no write mostly device")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20230706083727.608914-2-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>

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