There seems to be no reason for ZIL blocks to be limited by 128KB
other than replay code is written in such a way. This change does
not increase the limit yet, just removes the artificial limitation.
Avoided extra memcpy() may save us a second during replay.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Prakash Surya <prakash.surya@delphix.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14910
A NULL pointer will occur when doing a 'zfs send -S' on a dataset that
is still being received. The problem is that the new 'send' will
rightfully fail to own the datasets (i.e. dsl_dataset_own_force() will
fail), but then dmu_send() will still do the dsl_dataset_disown().
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Luís Henriques <henrix@camandro.org>
Closes#14903Closes#14890
This implements a binary search algorithm for B-Trees that reduces
branching to the absolute minimum necessary for a binary search
algorithm. It also enables the compiler to inline the comparator to
ensure that the only slowdown when doing binary search is from waiting
for memory accesses. Additionally, it instructs the compiler to unroll
the loop, which gives an additional 40% improve with Clang and 8%
improvement with GCC.
Consumers must opt into using the faster algorithm. At present, only
B-Trees used inside kernel code have been modified to use the faster
algorithm.
Micro-benchmarks suggest that this can improve binary search performance
by up to 3.5 times when compiling with Clang 16 and up to 1.9 times when
compiling with GCC 12.2.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes#14866
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes#14894
In addition to a number of actual log bytes written, account also a
total written bytes including padding and total allocated bytes (bytes
<= write <= alloc). It should allow to monitor zil traffic and space
efficiency.
Add dtrace probe for zil block size selection.
Make zilstat report more information and fit it into less width.
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14863
Before this change ZIL copied all log data while holding the lock.
It caused huge lock contention on workloads with many big parallel
writes. This change splits the process into two parts: first,
zil_lwb_assign() estimates the log space needed for all transactions,
and zil_lwb_write_close() allocates blocks and zios while holding the
lock, then, after the lock in dropped, zil_lwb_commit() copies the
data, and zil_lwb_write_issue() issues the I/Os.
Also while there slightly reduce scope of zl_lock.
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Reviewed-by: Prakash Surya <prakash.surya@delphix.com>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14841
For draid vdevs it was possible to initiate both the
sequential and healing resilver at same time.
This fixes the following two scenarios.
1) There's a window where a sequential rebuild can
be started via ZED even if a healing resilver has been
scheduled.
- This is fixed by adding additional check in
spa_vdev_attach() for any scheduled resilver and return
appropriate error code when a resilver is already in
progress.
2) It was possible for zpool clear to start a healing
resilver when it wasn't needed at all. This occurs because
during a vdev_open() the device is presumed to be healthy not
until the device is validated by vdev_validate() and it's set
unavailable. However, by this point an async resilver will
have already been requested if the DTL isn't empty.
- This is fixed by cancelling the SPA_ASYNC_RESILVER
request immediately at the end of vdev_reopen() when a resilver
is unneeded.
Finally, added a testcase in ZTS for verification.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Dipak Ghosh <dipak.ghosh@hpe.com>
Signed-off-by: Akash B <akash-b@hpe.com>
Closes#14881Closes#14892
Commit 555ef90 did some general code refactoring for
dmu_buf_will_not_fill() and dmu_buf_will_fill(). However, the db_mtx was
not held when update db->db_state in those code block. The rest of the
dbuf code always holds the db_mtx when updating db_state. This is
important because cv_wait() db_changed is used to check for db_state
changes.
Updating dmu_buf_will_not_fill() and dmu_buf_will_fill() to hold the
db_mtx when updating db_state.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Brian Atkinson <batkinson@lanl.gov>
Closes#14875
Before allowing the ZED to mark a vdev as REMOVED due to a
hotplug event confirm that it is non-responsive with probe.
Any device which can be successfully probed should be left
ONLINE to prevent a healthy pool from being incorrectly
SUSPENDED. This may occur for at least the following two
scenarios.
1) Drive expansion (zpool online -e) in VMware environments.
If, during the partition resize operation, a partition is
removed and re-created then udev will send a removed event.
2) Re-scanning the namespaces of an NVMe device (nvme ns-rescan)
may result in a udev remove and add event being delivered.
Finally, update the ZED to only kick in a spare when the
removal was successful.
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #14859Closes#14861
Added a flag '-e' in zpool scrub to scrub only blocks in error log. A
user can pause, resume and cancel the error scrub by passing additional
command line arguments -p -s just like a regular scrub. This involves
adding a new flag, creating new libzfs interfaces, a new ioctl, and the
actual iteration and read-issuing logic. Error scrubbing is executed in
multiple txg to make sure pool performance is not affected.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Co-authored-by: TulsiJain tulsi.jain@delphix.com
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes#8995Closes#12355
zpool initialize functions well for touching every free byte...once.
But if we want to do it again, we're currently out of luck.
So let's add zpool initialize -u to clear it.
Co-authored-by: Rich Ercolani <rincebrain@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes#12451Closes#14873
8eae2d214c caused Coverity to begin
complaining about "Improper use of negative value" in two places in
spa_sync_props() because Coverity correctly inferred from `prop ==
ZPOOL_PROP_INVAL` that prop could be -1 while both zpool_prop_to_name()
and zpool_prop_get_type() use it an array index, which is undefined
behavior.
Assuming that the system does not panic from an attempt to read invalid
memory, the case statement for ZPOOL_PROP_INVAL will ensure that only
user properties will reach this code when prop is ZPOOL_PROP_INVAL, such
that execution will continue safely. However, if we are unlucky enough
to read invalid memory, then the system will panic.
This issue predates the patch that caused coverity to begin complaining.
Thankfully, our userland tools do not pass nonsense to us, so this bug
should not be triggered unless a future userland tool attempts to set a
property that we do not understand.
Reported-by: Coverity (CID-1561129)
Reported-by: Coverity (CID-1561130)
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Amanakis <gamanakis@gmail.com>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes#14860
6839ec6f10 placed code in
spa_remove_healed_errors() that uses a pointer after the kmem_free()
call that frees it.
Reported-by: Coverity (CID-1562375)
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Amanakis <gamanakis@gmail.com>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes#14860
There is no sense to keep that memory allocated during the flush.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Prakash Surya <prakash.surya@delphix.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14855
Should not cause functional changes.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14854
The dmu_buf_is_dirty() call doesn't make sense here for two reasons:
1. txg is 0 for unassigned tx, so it was a no-op.
2. It is equivalent of checking if we have dirty records and we are doing
this few lines earlier.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes#14825
I don't know an easy way to shrink down dbuf size, so just deny block cloning
into dbufs that don't match our BP's size.
This fixes the following situation:
1. Create a small file, eg. 1kB of random bytes. Its dbuf will be 1kB.
2. Create a larger file, eg. 2kB of random bytes. Its dbuf will be 2kB.
3. Truncate the large file to 0. Its dbuf will remain 2kB.
4. Clone the small file into the large file. Small file's BP lsize is
1kB, but the large file's dbuf is 2kB.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes#14825
Reimplement some of the block cloning vs dbuf logic, mostly to fix
situation where we clone a block and in the same transaction group
we want to partially overwrite the clone.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes#14825
At least for RAIDZ zio_shrink() does not reduce zio size, but reduced
wsz in that case likely results in writing uninitialized memory.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14853
Provides an interface which callers can use to declare a write when
the exact starting offset in not yet known. Since the full range
being updated is not available only the first L0 block at the
provided offset will be prefetched.
Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#14819
l2arc_evict() performs the adjustment of the size of buffers to be
written on L2ARC unnecessarily. l2arc_write_size() is called right
before l2arc_evict() and performs those adjustments.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes#14828
We only need to know if ZIO has any parent there. We do not care if
it has more than one, but use of zio_unique_parent() == NULL asserts
that.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14823
In case check_filesystem() does not error out and does not report
an error, remove that error block from error lists and logs
without requiring a scrub. This can happen when the original file and
all snapshots/clones referencing it have been removed.
Otherwise zpool status will still report that "Permanent errors have
been detected..." without actually reporting any of them.
To implement this change the functions introduced in corrective
receive were modified to take into account the head_errlog feature.
Before this change:
=============================
pool: test
state: ONLINE
status: One or more devices has experienced an error resulting in data
corruption. Applications may be affected.
action: Restore the file in question if possible. Otherwise restore the
entire pool from backup.
see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-8A
config:
NAME STATE READ WRITE CKSUM
test ONLINE 0 0 0
/home/user/vdev_a ONLINE 0 0 2
errors: Permanent errors have been detected in the following files:
=============================
After this change:
=============================
pool: test
state: ONLINE
status: One or more devices has experienced an unrecoverable error. An
attempt was made to correct the error. Applications are
unaffected.
action: Determine if the device needs to be replaced, and clear the
errors
using 'zpool clear' or replace the device with 'zpool replace'.
see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-9P
config:
NAME STATE READ WRITE CKSUM
test ONLINE 0 0 0
/home/user/vdev_a ONLINE 0 0 2
errors: No known data errors
=============================
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes#14813
For the head_errlog feature use dsl_dataset_hold_obj_flags() instead of
dsl_dataset_hold_obj() in order to enable access to the encryption keys
(if loaded). This enables reporting of errors in encrypted filesystems
which are not mounted but have their keys loaded.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes#14837
If a block pointer is corrupted (but the block containing it checksums
correctly, e.g. due to a bug that overwrites random memory), we can
often detect it before the block is read, with the `zfs_blkptr_verify()`
function, which is used in `arc_read()`, `zio_free()`, etc.
However, such corruption is not typically recoverable. To recover from
it we would need to detect the memory error before the block pointer is
written to disk.
This PR verifies BP's that are contained in indirect blocks and dnodes
before they are written to disk, in `dbuf_write_ready()`. This way,
we'll get a panic before the on-disk data is corrupted. This will help
us to diagnose what's causing the corruption, as well as being much
easier to recover from.
To minimize performance impact, only checks that can be done without
holding the spa_config_lock are performed.
Additionally, when corruption is detected, the raw words of the block
pointer are logged. (Note that `dprintf_bp()` is a no-op by default,
but if enabled it is not safe to use with invalid block pointers.)
Reviewed-by: Rich Ercolani <rincebrain@gmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Paul Zuchowski <pzuchowski@datto.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes#14817
- There is no reason to assert that added gang is not empty. It
may be weird to add an empty gang, but it is legal.
- When moving chain list from the added gang clear its size, or it
will trigger assertion in abd_verify() when that gang is freed.
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14816
On kernel module unload, free all zfsdev state structures, except for
zfsdev_state_listhead, which is statically allocated.
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes#14824
spa_import() relies on a pool config fetched by spa_try_import() for
spare/cache devices. Import flags are not passed to spa_tryimport(),
which makes it return early due to a missing log device and missing
retrieving the cache device and spare eventually. Passing
ZFS_IMPORT_MISSING_LOG to spa_tryimport() makes it fetch the correct
configuration regardless of the missing log device.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes#14794
Integrate check_clones() into check_filesystem() and implement a list
instead of iterating recursively over the clones, thus eliminating the
risk of a stack overflow.
Also use kmem_zalloc() to allocate large structures in
process_error_log() reducing its stack size from ~700 to ~128 bytes.
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes#14744
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes#14806
This is a temporary measure until a better fix is sorted out.
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Rich Ercolani <rincebrain@gmail.com>
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Sponsored by: Rubicon Communications, LLC ("Netgate")
Closes#14785Closes#14808
Currently when layering the ABD buffer of each split block on top of
an indirect vdev's ZIO ABD we don't specify the split block's ABD.
This results in those ABDs being incorrectly sized by inheriting
the size of their parent ABD which is larger than what each split
block needs.
The above behavior isn't causing any bugs currently but can lead
to unexpected ABD sizes for people analyzing and/or working on
the ZIO codepath. This patch fixes this behavior by properly setting
the ABD size for split block ZIOs.
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Mark Maybee <mark.maybee@delphix.com>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes#14804
TX_COMMIT has no on-disk representation and does not produce any more
dirty data. It should not wait for anything, and even just skipping
the checks if not waiting gives improvement noticeable in profiler.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Prakash Surya <prakash.surya@delphix.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14798
Gang ABDs without childred are legal, and they do have zero size.
For other ABD types zero size doesn't have much sense and likely
not working correctly now.
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#14795
This reverts commit 4c856fb333 to
resolve a newly introduced deadlock which in practice in more
disruptive that the issue this commit intended to address.
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Mark Maybee <mark.maybee@delphix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #14775Closes#14790
Usage:
zpool set org.freebsd:comment="this is my pool" poolname
Tests are based on zfs_set's user property tests.
Also stop truncating property values at MAXNAMELEN, use ZFS_MAXPROPLEN.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Mateusz Piotrowski <mateusz.piotrowski@klarasystems.com>
Sponsored-by: Beckhoff Automation GmbH & Co. KG.
Sponsored-by: Klara Inc.
Closes#11680
And add it to the AVZ, this is not backwards compatible with older pools
due to an assertion in spa_sync() that verifies the number of ZAPs of
all vdevs matches the number of ZAPs in the AVZ.
Granted, the assertion only applies to #DEBUG builds - still, a feature
flag is introduced to avoid the assertion, com.klarasystems:vdev_zaps_v2
Notably, this allows to get/set properties on the root vdev:
% zpool set user:prop=value <pool> root-0
Before this commit, it was already possible to get/set properties on
top-level vdevs with the syntax <type>-<vdev_id> (e.g. mirror-0):
% zpool set user:prop=value <pool> mirror-0
This syntax also applies to the root vdev as it is is of type 'root'
with a vdev_id of 0, root-0. The keyword 'root' as an alias for
'root-0'.
The following tests have been added:
- zpool get all properties from root vdev
- zpool set a property on root vdev
- verify root vdev ZAP is created
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Wing <rob.wing@klarasystems.com>
Sponsored-by: Seagate Technology
Submitted-by: Klara, Inc.
Closes#14405
At our site we have seen cases when multi-modifier protection is enabled
(multihost=on) on our pool and the pool gets suspended due to a single
disk that is failing and responding very slowly. Our pools have 90 disks
in them and we expect disks to fail. The current version of MMP requires
that we wait for other writers before moving on. When a disk is
responding very slowly, we observed that waiting here was bad enough to
cause the pool to suspend. This change allows the MMP thread to bypass
waiting for other threads and reduces the chances the pool gets
suspended.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Herb Wartens <hawartens@gmail.com>
Closes#14659
Spare vdev should detach from the pool when a disk is reinserted.
However, spare detachment depends on the completion of resilvering,
and if resilver does not schedule, the spare vdev keeps attached to
the pool until the next resilvering. When a zfs pool contains
several disks (25+ mirror), resilvering does not always happen when
a disk is reinserted. In this patch, spare vdev is manually detached
from the pool when resilvering does not occur and it has been tested
on both Linux and FreeBSD.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes#14722
This reverts commit 4b3133e671.
Users identified this commit as a possible source of data
corruption:
https://github.com/openzfs/zfs/issues/14753
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Issue #14753Closes#14761
The zfs_log_clone_range() function is never called from the
zfs_clone_range_replay() function, so I assumed it is safe to assert
that zil_replaying() is never TRUE here. It turns out zil_replaying()
also returns TRUE when the sync property is set to disabled.
Fix the problem by just returning if zil_replaying() returns TRUE.
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reported by: Florian Smeets
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes#14758
Don't overwrite blk_phys_birth, as for embedded blocks it is part of
the payload.
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Issue #13392Closes#14739
Fix the code in case of missing snapshots. Previously the check was in
a conditional that would be executed if the filesystem had snapshots.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes#14735
The ereport.fs.zfs.checksum event contains histograms of the bits that
were wrongly set or cleared according to their bit position in a 64-bit
word. So the maximum value that any histogram bucket could have would
be 64. But ZFS currently uses a uint32_t to hold each bucket. As a
result, the event report is full of needless zeroes.
Change the bucket size to uint8_t, stripping 768 needless zeros from
each event.
Original event format:
```
class=ereport.fs.zfs.checksum ena=639460469834258433 pool=testpool.1933 pool_guid=4979719877084416563 pool_state=0 pool_context=0 pool_failmode=wait vdev_guid=4136721804819128578 vdev_type=file vdev_path=/tmp/kyua.1TxP3A/2/work/file1.1933 vdev_ashift=9 vdev_complete_ts=609837019678 vdev_delta_ts=33450 vdev_read_errors=0 vdev_write_errors=0 vdev_cksum_errors=20 vdev_delays=0 parent_guid=2751977006639883417 parent_type=raidz vdev_spare_guids= zio_err=0 zio_flags=1048752 zio_stage=4194304 zio_pipeline=65011712 zio_delay=0 zio_timestamp=0 zio_delta=0 zio_priority=4 zio_offset=702976 zio_size=1024 zio_objset=24 zio_object=0 zio_level=3 zio_blkid=0 bad_ranges=0000000000000400 bad_ranges_min_gap=8 bad_range_sets=0000079e bad_range_clears=00000854 bad_set_histogram=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 bad_cleared_histogram=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 time=00000016806457270000000323406839 eid=458
```
New format:
```
class=ereport.fs.zfs.checksum ena=96599319807790081 pool=testpool.1933 pool_guid=1236902063710799041 pool_state=0 pool_context=0 pool_failmode=wait vdev_guid=2774253874431514999 vdev_type=file vdev_path=/tmp/kyua.6Temlq/2/work/file1.1933 vdev_ashift=9 vdev_complete_ts=92124283803 vdev_delta_ts=46670 vdev_read_errors=0 vdev_write_errors=0 vdev_cksum_errors=20 vdev_delays=0 parent_guid=8090931855087882905 parent_type=raidz vdev_spare_guids= zio_err=0 zio_flags=1048752 zio_stage=4194304 zio_pipeline=65011712 zio_delay=0 zio_timestamp=0 zio_delta=0 zio_priority=4 zio_offset=1028608 zio_size=512 zio_objset=0 zio_object=0 zio_level=0 zio_blkid=4 bad_ranges=0000000000000200 bad_ranges_min_gap=8 bad_range_sets=0000061f bad_range_clears=000001f4 bad_set_histogram=1719161c1c1c101618171a151a1a19161e1c171d1816161c191f1a18192117191c131d171b1613151a171419161a1b1319101b14171b18151e191a1b141a1c17 bad_cleared_histogram=06090a0808070a0b020609060506090a01090a050a0a0509070609080d050d0607080d060507080c04070807070a0608020c080c080908040808090a05090a07 time=00000016806477050000000604157480 eid=62
```
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Alan Somers <asomers@FreeBSD.org>
Sponsored-by: Axcient
Closes#14716
Linux kernel 6.3 changed a bunch of APIs to use the dedicated idmap
type for mounts (struct mnt_idmap), we need to detect these changes
and make zfs work with the new APIs.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Youzhong Yang <yyang@mathworks.com>
Closes#14682
