Commit Graph

4182 Commits

Author SHA1 Message Date
George Amanakis feff9dfed3
Fix the L2ARC write size calculating logic (2)
While commit bcd5321 adjusts the write size based on the size of the log
block, this happens after comparing the unadjusted write size to the
evicted (target) size.

In this case l2ad_hand will exceed l2ad_evict and violate an assertion
at the end of l2arc_write_buffers().

Fix this by adding the max log block size to the allocated size of the
buffer to be committed before comparing the result to the target
size.

Also reset the l2arc_trim_ahead ZFS module variable when the adjusted
write size exceeds the size of the L2ARC device.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #14936
Closes #14954
2023-06-09 17:05:47 -07:00
Alexander Motin 70ea484e3e
Finally drop long disabled vdev cache.
It was a vdev level read cache, designed to aggregate many small
reads by speculatively issuing bigger reads instead and caching
the result.  But since it has almost no idea about what is going
on with exception of ZIO_FLAG_DONT_CACHE flag set by higher layers,
it was found to make more harm than good, for which reason it was
disabled for the past 12 years.  These days we have much better
instruments to enlarge the I/Os, such as speculative and prescient
prefetches, I/O scheduler, I/O aggregation etc.

Besides just the dead code removal this removes one extra mutex
lock/unlock per write inside vdev_cache_write(), not otherwise
disabled and trying to do some work.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #14953
2023-06-09 12:40:55 -07:00
Alexander Motin b3ad3f48d9
Use list_remove_head() where possible.
... instead of list_head() + list_remove().  On FreeBSD the list
functions are not inlined, so in addition to more compact code
this also saves another function call.

Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #14955
2023-06-09 10:12:52 -07:00
Alexander Motin 55b1842f92
ZIL: Fix race introduced by f63811f072.
We are not allowed to access lwb after setting LWB_STATE_FLUSH_DONE
state and dropping zl_lock, since it may be freed by zil_sync().
To free itxs and waiters after dropping the lock we need to move
lwb_itxs and lwb_waiters lists elements to local storage.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #14957
Closes #14959
2023-06-09 10:08:05 -07:00
Brian Behlendorf 93f8abeff0
Linux: Never sleep in kmem_cache_alloc(..., KM_NOSLEEP) (#14926)
When a kmem cache is exhausted and needs to be expanded a new
slab is allocated.  KM_SLEEP callers can block and wait for the
allocation, but KM_NOSLEEP callers were incorrectly allowed to
block as well.

Resolve this by attempting an emergency allocation as a best
effort.  This may fail but that's fine since any KM_NOSLEEP
consumer is required to handle an allocation failure.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Adam Moss <c@yotes.com>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
2023-06-07 10:43:43 -07:00
George Amanakis bcd5321039
Fix the L2ARC write size calculating logic
l2arc_write_size() should return the write size after adjusting for trim
and overhead of the L2ARC log blocks. Also take into account the
allocated size of log blocks when deciding when to stop writing buffers
to L2ARC.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #14939
2023-06-06 12:32:37 -07:00
Rob Norris 8653f1de48 zdb: add -B option to generate backup stream
This is more-or-less like `zfs send`, but specifying the snapshot by its
objset id for situations where it can't be referenced any other way.

Sponsored-By: Klara, Inc.
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: WHR <msl0000023508@gmail.com>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #14642
2023-06-05 11:54:42 -07:00
Rob Norris 2b9f8ba673 znode: expose zfs_get_zplprop to libzpool
There's no particular reason this function should be kernel-only, and I
want to use it (indirectly) from zdb. I've moved it to zfs_znode.c
because libzpool does not compile in zfs_vfsops.c, and this at least
matches the header its imported from.

Sponsored-By: Klara, Inc.
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: WHR <msl0000023508@gmail.com>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #14642
2023-06-05 11:53:44 -07:00
Alexander Motin 5ba4025a8d
Introduce zfs_refcount_(add|remove)_few().
There are two places where we need to add/remove several references
with semantics of zfs_refcount_(add|remove). But when debug/tracing
is disabled, it is a crime to run multiple atomic_inc() in a loop,
especially under congested pool-wide allocator lock.

Introduced new functions implement the same semantics as the loop,
but without overhead in production builds.

Reviewed-by: Rich Ercolani <rincebrain@gmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #14934
2023-06-05 11:51:44 -07:00
Alexander Motin 482da24e20
ZIL: Allow to replay blocks of any size.
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
2023-06-02 11:01:58 -07:00
Luís Henriques 928c81f4df
Fix NULL pointer dereference when doing concurrent 'send' operations
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 #14903 
Closes #14890
2023-05-30 15:15:24 -07:00
Richard Yao 677c6f8457
btree: Implement faster binary search algorithm
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
2023-05-26 10:03:12 -07:00
George Amanakis bb736d98d1
Fix inconsistent definition of zfs_scrub_error_blocks_per_txg
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
2023-05-26 09:53:00 -07:00
Alexander Motin b6fbe61fa6
zil: Add some more statistics.
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
2023-05-25 13:51:53 -07:00
Alexander Motin f63811f072
ZIL: Reduce scope of per-dataset zl_issuer_lock.
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
2023-05-25 09:48:43 -07:00
Akash B 9d618615d1
Fix concurrent resilvers initiated at same time
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 #14881
Closes #14892
2023-05-24 12:28:09 -07:00
youzhongyang f8447cf22e
Linux 6.4 compat: reclaimed_slab renamed to reclaimed
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Youzhong Yang <yyang@mathworks.com>
Closes #14891
2023-05-24 12:23:42 -07:00
Brian Atkinson ad0a554614
Hold db_mtx when updating db_state
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
2023-05-19 13:05:53 -07:00
Brian Behlendorf 577e835f30
Probe vdevs before marking removed
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 #14859
Closes #14861
2023-05-19 13:05:09 -07:00
George Amanakis 482eeef804 Teach zpool scrub to scrub only blocks in error log
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 #8995
Closes #12355
2023-05-18 11:59:42 -07:00
Brian Behlendorf e34e15ed6d
Add the ability to uninitialize
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 #12451 
Closes #14873
2023-05-18 10:02:20 -07:00
Richard Yao ee7b71dbc9 Fix undefined behavior in spa_sync_props()
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
2023-05-15 10:29:05 -07:00
Richard Yao c87798d8ff Fix use after free regression in spa_remove_healed_errors()
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
2023-05-15 10:29:01 -07:00
Alexander Motin 7381ddf1ab
zil: Free lwb_buf after write completion.
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
2023-05-12 09:49:26 -07:00
Alexander Motin 895e03135e
zil: Some micro-optimizations.
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
2023-05-12 09:14:29 -07:00
Pawel Jakub Dawidek e610766838 Make sure we are not trying to clone a spill block.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes #14825
2023-05-11 16:07:15 -07:00
Pawel Jakub Dawidek fbbe5e96ef Correct comment.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes #14825
2023-05-11 16:07:11 -07:00
Pawel Jakub Dawidek 9879930f7a Remove badly placed comment.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes #14825
2023-05-11 16:07:07 -07:00
Pawel Jakub Dawidek b6d7370b9d Don't call zfs_exit_two() before zfs_enter_two().
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pawel Jakub Dawidek <pawel@dawidek.net>
Closes #14825
2023-05-11 16:07:02 -07:00
Pawel Jakub Dawidek d0d91f185e Don't use dmu_buf_is_dirty() for unassigned transaction.
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
2023-05-11 16:06:57 -07:00
Pawel Jakub Dawidek bd8c6bd66f Deny block cloning is dbuf size doesn't match BP size.
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
2023-05-11 16:06:52 -07:00
Pawel Jakub Dawidek 555ef90c5c Additional block cloning fixes.
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
2023-05-11 16:06:36 -07:00
Alexander Motin 469019fb0b
zil: Don't expect zio_shrink() to succeed.
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
2023-05-11 14:27:12 -07:00
Ameer Hamza 14ba8ab97d
Prevent panic during concurrent snapshot rollback and zvol read
Protect zvol_cdev_read with zv_suspend_lock to prevent concurrent
release of the dnode, avoiding panic when a snapshot is rolled back
in parallel during ongoing zvol read operation.

Reviewed-by: Chunwei Chen <tuxoko@gmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes #14839
2023-05-09 17:56:35 -07:00
Brian Behlendorf 903c3613d4
Add dmu_tx_hold_append() interface
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
2023-05-09 09:03:10 -07:00
George Amanakis d38c815fe2
Remove duplicate code in l2arc_evict()
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
2023-05-09 08:54:41 -07:00
Alexander Motin b035f2b2cb
Remove single parent assertion from zio_nowait().
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
2023-05-09 08:54:01 -07:00
George Amanakis 6839ec6f10
Enable the head_errlog feature to remove errors
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
2023-05-09 08:53:27 -07:00
George Amanakis 4eca03faaf
Fixes in head_errlog feature with encryption
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
2023-05-08 13:35:03 -07:00
Matthew Ahrens 3095ca91c2
Verify block pointers before writing them out
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
2023-05-08 11:20:23 -07:00
Alexander Motin 190290a9ac
Fix two abd_gang_add_gang() issues.
- 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
2023-05-05 09:17:55 -07:00
Pawel Jakub Dawidek 599df82049
Plug memory leak in zfsdev_state.
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
2023-05-05 08:51:41 -07:00
Ameer Hamza 82ac409acc
zpool import -m also removing spare and cache when log device is missing
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
2023-05-03 15:10:32 -07:00
George Amanakis 9de5300c7f
Optimize check_filesystem() and process_error_log()
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
2023-05-03 09:00:14 -07:00
Pawel Jakub Dawidek d96e29576c
Use correct block pointer in block cloning case.
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
2023-05-02 09:24:26 -07:00
Mateusz Guzik e2a92d726e
blake3: fix up bogus checksums in face of cpu migration
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 #14785
Closes #14808
2023-05-01 17:21:27 -07:00
Serapheim Dimitropoulos 0c93d86f01
Correct ABD size for split block ZIOs
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
2023-05-01 17:18:42 -07:00
Justin Hibbits 5a83f761c7
powerpc64: Support ELFv2 asm on Big Endian
FreeBSD/powerpc64 is all ELFv2 since FreeBSD 13, even big endian.  The
existing sha256 and sha512 asm code assumes that BE is all ELFv1, and LE
is ELFv2.  Minor changes to add ELFv2 in the BE side gets this working
correctly on FreeBSD with latest OpenZFS import.

Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Justin Hibbits <chmeeedalf@gmail.com>
Closes #14779
2023-04-27 12:49:21 -07:00
Alexander Motin 2fd1c30423
Mark TX_COMMIT transaction with TXG_NOTHROTTLE.
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
2023-04-27 12:32:58 -07:00
Tino Reichardt ee728008a4
Fix BLAKE3 aarch64 assembly for FreeBSD and macOS
The x18 register isn't useable within FreeBSD kernel space, so we
have to fix the BLAKE3 aarch64 assembly for not using it.

The source files are here: https://github.com/mcmilk/BLAKE3-tests

Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de>
Closes #14728
2023-04-26 12:40:26 -07:00