db.db_mtx must be held any time that db.db_data is accessed. All of
these functions do have the lock held by a parent; add assertions to
ensure that it stays that way.
See https://github.com/openzfs/zfs/discussions/17118
* Refactor dbuf_read_bonus to make it obvious why db_rwlock isn't
required.
* Refactor dbuf_hold_copy to eliminate the db_rwlock
Copy data into the newly allocated buffer before assigning it to the db.
That way, there will be no need to take db->db_rwlock.
* Refactor dbuf_read_hole
In the case of an indirect hole, initialize the newly allocated buffer
before assigning it to the dmu_buf_impl_t.
Sponsored by: ConnectWise
Signed-off-by: Alan Somers <asomers@gmail.com>
Closes#17209
(cherry picked from commit c17bdc4914)
SYSCTL_SIZEOF() has been introduced in FreeBSD by commit "sysctl(9):
Ease exporting struct sizes; Discourage doing that" (713abc9880aa) in
branch 'main'. It will soon be backported to 'stable/14'. We will thus
be able to remove the old, alternate version left in the '#else' branch
as soon as 'stable/13' goes out of support (April 30, 2026).
Sponsored-by: The FreeBSD Foundation
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Olivier Certner <olce@FreeBSD.org>
Closes#17309
(cherry picked from commit 78628a5c15)
With certain combinations of target ARC states balance and ghost
hit rates it was possible to get the fractions outside of allowed
range. This patch limits maximum balance adjustment speed, which
should make it impossible, and also asserts it.
Fixes#17210
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Reviewed-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
(cherry picked from commit b1ccab1721)
txg_wait_synced_sig() is "wait for txg, unless a signal arrives". We
expect that future development will require similar "wait unless X"
behaviour.
This generalises the API as txg_wait_synced_flags(), where the provided
flags describe the events that should cause the call to return.
Instead of a boolean, the return is now an error code, which the caller
can use to know which event caused the call to return.
The existing call to txg_wait_synced_sig() is now
txg_wait_synced_flags(TXG_WAIT_SIGNAL).
Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Allan Jude <allan@klarasystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
(cherry picked from commit a7de203c86)
We should not clear scn_state and notify waiters until we call
vdev_dtl_reassess(), otherwise following offline/detach request
may fail with "no valid replicas".
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
(cherry picked from commit f86d9af16b)
It's possible for two spares to get attached to a single failed vdev.
This happens when you have a failed disk that is spared, and then you
replace the failed disk with a new disk, but during the resilver
the new disk fails, and ZED kicks in a spare for the failed new
disk. This commit checks for that condition and disallows it.
Reviewed-by: Akash B <akash-b@hpe.com>
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes: #16547Closes: #17231
(cherry picked from commit f40ab9e399)
### Background
Various admin operations will be invoked by some userspace task, but the
work will be done on a separate kernel thread at a later time. Snapshots
are an example, which are triggered through zfs_ioc_snapshot() ->
dsl_dataset_snapshot(), but the actual work is from a task dispatched to
dp_sync_taskq.
Many such tasks end up in dsl_enforce_ds_ss_limits(), where various
limits and permissions are enforced. Among other things, it is necessary
to ensure that the invoking task (that is, the user) has permission to
do things. We can't simply check if the running task has permission; it
is a privileged kernel thread, which can do anything.
However, in the general case it's not safe to simply query the task for
its permissions at the check time, as the task may not exist any more,
or its permissions may have changed since it was first invoked. So
instead, we capture the permissions by saving CRED() in the user task,
and then using it for the check through the secpolicy_* functions.
### Current implementation
The current code calls CRED() to get the credential, which gets a
pointer to the cred_t inside the current task and passes it to the
worker task. However, it doesn't take a reference to the cred_t, and so
expects that it won't change, and that the task continues to exist. In
practice that is always the case, because we don't let the calling task
return from the kernel until the work is done.
For Linux, we also take a reference to the current task, because the
Linux credential APIs for the most part do not check an arbitrary
credential, but rather, query what a task can do. See
secpolicy_zfs_proc(). Again, we don't take a reference on the task, just
a pointer to it.
### Changes
We change to calling crhold() on the task credential, and crfree() when
we're done with it. This ensures it stays alive and unchanged for the
duration of the call.
On the Linux side, we change the main policy checking function
priv_policy_ns() to use override_creds()/revert_creds() if necessary to
make the provided credential active in the current task, allowing the
standard task-permission APIs to do the needed check. Since the task
pointer is no longer required, this lets us entirely remove
secpolicy_zfs_proc() and the need to carry a task pointer around as
well.
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Pavel Snajdr <snajpa@snajpa.net>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
(cherry picked from commit c8fa39b46c)
Originally the Lustre ZFS OSD code was going to use zfs_uio_t structs
for supporting Direct I/O with ZFS. However, this has changed to using
abd_t structs instead. This exports the proper symbols that will be used
by the Lustre ZFS OSD code.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Brian Atkinson <batkinson@lanl.gov>
Closes#17256
(cherry picked from commit 7031a48c70)
dbuf_prefetch_impl() should look on level of current indirect, not
the target prefetch level. dbuf_prefetch_indirect_done() should
call dnode_level_is_l2cacheable() if we have dpa_dnode to pass it.
It should fix some both false positive and negative L2ARC caching.
While there, fix redacted feature activation assertions. One was
always true, while another could give false positive if dpa_dnode
is NULL.
George Amanakis <gamanakis@gmail.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#17204
(cherry picked from commit a497c5fc8b)
Since embedded blocks introduction 11 years ago, their writing was
blocked if dedup is enabled. After searching through the modern
code I see no reason for this restriction to exist. Same time
embedded blocks are dramatically cheaper. Even regular write of
so small blocks would likely be cheaper than deduplication, even
if the last is successful, not mentioning otherwise.
Reviewed-by: Allan Jude <allan@klarasystems.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#17113
(cherry picked from commit 09f4dd06c3)
Previous implementation of zap_leaf_array_free() put chunks on the
free list in reverse order. Also zap_leaf_transfer_entry() and
zap_entry_remove() were freeing name and value arrays in reverse
order. Together this created a mess in the free list, making
following allocations much more fragmented than necessary.
This patch re-implements zap_leaf_array_free() to keep existing
chunks order, and implements non-destructive zap_leaf_array_copy()
to be used in zap_leaf_transfer_entry() to allow properly ordered
freeing name and value arrays there and in zap_entry_remove().
With this change test of some writes and deletes shows percent of
non-contiguous chunks in DDT reducing from 61% and 47% to 0% and
17% for arrays and frees respectively. Sure some explicit sorting
could do even better, especially for ZAPs with variable-size arrays,
but it would also cost much more, while this should be very cheap.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#16766
(cherry picked from commit 9a81484e35)
Fix build errors on Fedora 42 like:
module/zcommon/zfs_valstr.c:193:16: error: initializer-string for
array of 'char' truncates NUL terminator but destination lacks
'nonstring' attribute (3 chars into 2 available)
The arrays in zpool_vdev_os.c and zfs_valstr.c don't need to be
NULL terminated, but we do so to make GCC happy.
Closes: #17242
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
IVs != 96 bits get hashed with GHASH to bring them to 96 bits. Any call
to GHASH will mix the ghash state in gcm_ghash. This is expected to be
zero at first use in an encrypt or decrypt operation, so it needs to be
zeroed after using GHASH in setup.
gcm_init() does this, but gcm_avx_init() zeroed it before setup, not
after, resulting in incorrect encrypt/decrypt results when using AVX GCM
with an IV != 96 bits.
OpenZFS _always_ uses a 96 bit IV (ZIO_DATA_IV_LEN) so this will never
have been hit in any real-world use, which is extremely fortunate, as we
would have incorrectly-encrypted data on-disk. Still, as long as we have
this code here we should make sure it's correct.
Thanks-to: Joel Low <joel@joelsplace.sg>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Attila Fülöp <attila@fueloep.org>
The 6.0 kernel removes the 'migratepage' VFS op. Check for
migratepage.
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org
When a dedup write fails, we try to roll the DDT entry back to a known
good state. However, this also rolls the refcounts and the last-update
time back to the state they were at when we started this write. This
doesn't appear to be able to cause any refcount leaks (after the fix in
17123). This PR prevents that from happening by only rolling back the
parts of the DDT entry that have been updated by the write so far.
Sponsored-by: iXsystems, Inc.
Sponsored-by: Klara, Inc.
Signed-off-by: Paul Dagnelie <paul.dagnelie@klarasystems.com>
Co-authored-by: Paul Dagnelie <paul.dagnelie@klarasystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
When opening a vdev and setting the nonrot property, we used to wait for
each child to be opened before examining its nonrot property. When the
change was made to open vdevs asynchronously, we didn't move the nonrot
check out of the main loop. As a result, the nonrot property is almost
always set to false, regardless of the actual type of the underlying
disks. The fix is simply to move the nonrot check to a separate loop
after the taskq has been waited for.
Sponsored-by: Klara, Inc.
Sponsored-by: Eshtek, Inc.
Signed-off-by: Paul Dagnelie <paul.dagnelie@klarasystems.com>
Co-authored-by: Paul Dagnelie <paul.dagnelie@klarasystems.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
FreeBSD kernel's WITNESS code detected lock ordering violation in
spa_vdev_remove_cancel_sync(). It took svr_lock while holding
ms_lock, which is opposite to other places. I was thinking to
resolve it similar to #17145, but looking closer I don't think
we even need svr_lock at that point, since we already asserted
svr_allocd_segs is empty, and we don't need to add there segments
we are going to call free_mapped_segment_cb for.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#17164
Since spa_dspace accounts only normal allocation class space,
spa_nonallocating_dspace should do the same. Otherwise we may get
negative overflow or respective assertion spa_update_dspace() if
removed special/dedup vdev is bigger than all normal class space.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Paul Dagnelie <paul.dagnelie@klarasystems.com>
Closes#17183
In addition to hotplug events, the kernel may also mark a failing vdev
as REMOVED. This was observed in a customer report and reproduced by
forcing the NVMe host driver to disable the device after a failed reset
due to command timeout. In such cases, the spare was not activated
because the device had already transitioned to a REMOVED state before
zed processed the event.
To address this, explicitly attempt hot spare activation when the
kernel marks a device as REMOVED.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes#17187
When after device removal we handle block pointers remap, skip blocks
that might be cloned. BRTs are indexed by vdev id and offset from
block pointer's DVA[0]. So if we start addressing the same block by
some different DVA, we won't get the proper reference counter. As
result, we might either remap the block twice, that may result in
assertion during indirect mapping condense, or free it prematurely,
that may result in data overwrite, or free it twice, that may result
in assertion in spacemap code.
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#15604Closes#17180
It turns out that approach taken in the original version of the patch
was wrong. So now, we're taking approach in-line with how kernel
actually does it - when sb is being torn down, access to it
is serialized via sb->s_umount rwsem, only when that lock is taken
is it okay to work with s_flags - and the other mistake I was doing
was trying to make SB_ACTIVE work, but apparently the kernel checks
the negative variant - not SB_DYING and not SB_BORN.
Kernels pre-6.6 don't have SB_DYING, but check if sb is hashed
instead.
Signed-off-by: Pavel Snajdr <snajpa@snajpa.net>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
spa_vdev_remove_thread() should not hold svr_lock while loading a
metaslab. It may block ZIO threads, required to handle metaslab
loading, at least in case of read errors causing recovery writes.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Rob Norris <robn@despairlabs.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#17145
The vd->vdev_ms access can overflow due to on-disk corruption, not just
due to programming bugs. So it makes sense to check its boundaries even
in production builds.
Sponsored by: ConnectWise
Reviewed by: Alek Pinchuk <pinchuk.alek@gmail.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Alan Somers <asomers@gmail.com>
Closes#17136
This helps to avoids confusion with the similarly-named
txg_wait_synced().
Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Mariusz Zaborski <mariusz.zaborski@klarasystems.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
People have noted there's no way to remove a pool userprop, only zero
it. Turns vdev userprops had a method, by setting empty-string. So this
makes pool userprops follow the same behaviour.
Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes#16887
Force receive (zfs receive -F) can rollback or destroy snapshots and
file systems that do not exist on the sending side (see zfs-receive man
page). This means an user having the receive permission can effectively
delete data on receiving side, even if such user does not have explicit
rollback or destroy permissions.
This patch adds the receive:append permission, which only permits
limited, non-forced receive. Behavior for users with full receive
permission is not changed in any way.
Fixes#16943
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Gionatan Danti <g.danti@assyoma.it>
Closes#17015
Implementation of DDT pruning introduced verification of DVAs in
a block pointer during ddt_lookup() to not by mistake free previous
pruned incarnation of the entry. But when writing a new block in
zio_ddt_write() we might have the DVAs only from override pointer,
which may never have "D" flag to be confused with pruned DDT entry,
and we'll abandon those DVAs if we find a matching entry in DDT.
This fixes deduplication for blocks written via dmu_sync() for
purposes of indirect ZIL write records, that I have tested. And
I suspect it might actually allow deduplication for Direct I/O,
even though in an odd way -- first write block directly and then
delete it later during TXG commit if found duplicate, which part
I haven't tested.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#17120
This statx(2) mask returns the alignment restrictions for O_DIRECT
access on the given file.
We're expected to return both memory and IO alignment. For memory, it's
always PAGE_SIZE. For IO, we return the current block size for the file,
which is the required alignment for an arbitrary block, and for the
first block we'll fall back to the ARC when necessary, so it should
always work.
Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes#16972
Now instead of crashing when attempting to read the corrupt block
pointer, ZFS will return ECKSUM, in a stack that looks like this:
```
none:set-error
zfs.ko`arc_read+0x1d82
zfs.ko`dbuf_read+0xa8c
zfs.ko`dmu_buf_hold_array_by_dnode+0x292
zfs.ko`dmu_read_uio_dnode+0x47
zfs.ko`zfs_read+0x2d5
zfs.ko`zfs_freebsd_read+0x7b
kernel`VOP_READ_APV+0xd0
kernel`vn_read+0x20e
kernel`vn_io_fault_doio+0x45
kernel`vn_io_fault1+0x15e
kernel`vn_io_fault+0x150
kernel`dofileread+0x80
kernel`sys_read+0xb7
kernel`amd64_syscall+0x424
kernel`0xffffffff810633cb
```
This patch should hopefully also prevent such corrupt block pointers
from being written to disk in the first place.
And in zdb, don't crash when printing a block pointer with no valid
DVAs. If a block pointer isn't embedded yet doesn't have any valid
DVAs, that's a data corruption bug. zdb should be able to handle the
situation gracefully.
Finally, remove an extra check for gang blocks in SNPRINTF_BLKPTR. This
check, which compares the asizes of two different DVAs within the same
BP, was added by illumos-gate commit b24ab67[^1], and I can't understand
why. It doesn't appear to do anything useful, so remove it.
[^1]: b24ab67627
Fixes #17077
Sponsored by: ConnectWise
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Alek Pinchuk <pinchuk.alek@gmail.com>
Signed-off-by: Alan Somers <asomers@gmail.com>
Closes#17078
PR #14161 made spa_do_crypt_objset_mac_abd() to ignore MAC errors
if local MAC can not be calculated at the time. But it does not
mean we should also ignore portable MAC errors there.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#17122
Adding fields to zinject_record_t unexpectedly extended zfs_cmd_t,
preventing some things working properly with 2.3.1 userspace tools
against 2.3.0 kernel module.
This reverts commit fabdd502f4.
Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
In l2arc_evict(), the config lock may be acquired in reverse order
(e.g., first the config lock (writer), then a hash lock) unlike in
arc_read() during scenarios like L2ARC device removal. To avoid
deadlocks, if the attempt to acquire the config lock (reader) fails
in arc_read(), release the hash lock, wait for the config lock, and
retry from the beginning.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes#17071
Don't try to get mg of hole vdev in removal
Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Paul Dagnelie <paul.dagnelie@klarasystems.com>
Closes#17080
Reviewed-by: Ameer Hamza <ahamza@ixsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: SHENGYI HONG <aokblast@FreeBSD.org>
Closes#17088
Before this change zfs_metaslab_switch_threshold tunable switched
metaslabs each time ones index reduced by two (which means biggest
contiguous chunk reduced to 1/4). It is a good idea to balance
metaslabs fragmentation. But for empty metaslabs (having power-
of-2 sizes) this means switching when they get just below the half
of their capacity. Inspection with zdb after filling new pool to
half capacity shown most of its metaslabs filled to half capacity.
I consider this sub-optimal for pool fragmentation in a long run.
This change blocks the metaslabs switching if most of the metaslab
free space (15/16) is represented by a single contiguous range.
Such metaslab should not be considered fragmented until it actually
fail some big allocation. More contiguous filling should improve
data locality and increase time before previously filled and
partially freed metaslab is touched again, giving it more time to
free more contiguous chunks for lower fragmentation. It should
also slightly reduce spacemap traffic.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes#17081
zfs_file_fsync() and zfs_file_deallocate() are both blocking ops, so the
zio_taskq thread is active and blocked both while waiting for the IO
call and then while calling zio_execute() for the next stage. This is a
particular issue for FLUSH, as the z_flush_iss queue typically only has
one thread; multiple flushes arriving at once can cause long delays if
the underlying fsync() response is particularly slow.
To fix this, we dispatch both FLUSH and TRIM to the z_vdev_file taskq,
just as we do for reads and writes. Further, we return all results
through zio_interrupt(), so neither the issue nor the file taskqs are
blocked.
Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes#17064
