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8fb1ede146
The intent of this patch is extend the existing deadman code
such that it's flexible enough to be used by both ztest and
on production systems. The proposed changes include:
* Added a new `zfs_deadman_failmode` module option which is
used to dynamically control the behavior of the deadman. It's
loosely modeled after, but independant from, the pool failmode
property. It can be set to wait, continue, or panic.
* wait - Wait for the "hung" I/O (default)
* continue - Attempt to recover from a "hung" I/O
* panic - Panic the system
* Added a new `zfs_deadman_ziotime_ms` module option which is
analogous to `zfs_deadman_synctime_ms` except instead of
applying to a pool TXG sync it applies to zio_wait(). A
default value of 300s is used to define a "hung" zio.
* The ztest deadman thread has been re-enabled by default,
aligned with the upstream OpenZFS code, and then extended
to terminate the process when it takes significantly longer
to complete than expected.
* The -G option was added to ztest to print the internal debug
log when a fatal error is encountered. This same option was
previously added to zdb in commit fa603f82. Update zloop.sh
to unconditionally pass -G to obtain additional debugging.
* The FM_EREPORT_ZFS_DELAY event which was previously posted
when the deadman detect a "hung" pool has been replaced by
a new dedicated FM_EREPORT_ZFS_DEADMAN event.
* The proposed recovery logic attempts to restart a "hung"
zio by calling zio_interrupt() on any outstanding leaf zios.
We may want to further restrict this to zios in either the
ZIO_STAGE_VDEV_IO_START or ZIO_STAGE_VDEV_IO_DONE stages.
Calling zio_interrupt() is expected to only be useful for
cases when an IO has been submitted to the physical device
but for some reasonable the completion callback hasn't been
called by the lower layers. This shouldn't be possible but
has been observed and may be caused by kernel/driver bugs.
* The 'zfs_deadman_synctime_ms' default value was reduced from
1000s to 600s.
* Depending on how ztest fails there may be no cache file to
move. This should not be considered fatal, collect the logs
which are available and carry on.
* Add deadman test cases for spa_deadman() and zio_wait().
* Increase default zfs_deadman_checktime_ms to 60s.
Reviewed-by: Tim Chase <tim@chase2k.com>
Reviewed by: Thomas Caputi <tcaputi@datto.com>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #6999
930 lines
14 KiB
Groff
930 lines
14 KiB
Groff
'\" te
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.\" Copyright (c) 2013 by Turbo Fredriksson <turbo@bayour.com>. All rights reserved.
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.\" The contents of this file are subject to the terms of the Common Development
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.\" and Distribution License (the "License"). You may not use this file except
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.\" in compliance with the License. You can obtain a copy of the license at
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.\" usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.
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.\"
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.\" See the License for the specific language governing permissions and
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.\" limitations under the License. When distributing Covered Code, include this
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.\" CDDL HEADER in each file and include the License file at
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.\" usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this
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.\" CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your
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.\" own identifying information:
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.\" Portions Copyright [yyyy] [name of copyright owner]
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.TH ZFS-EVENTS 5 "Jun 6, 2015"
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.SH NAME
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zfs\-events \- Events created by the ZFS filesystem.
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.SH DESCRIPTION
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.sp
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.LP
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Description of the different events generated by the ZFS stack.
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.sp
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Most of these don't have any description. The events generated by ZFS
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have never been publicly documented. What is here is intended as a
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starting point to provide documentation for all possible events.
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.sp
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To view all events created since the loading of the ZFS infrastructure
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(i.e, "the module"), run
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.P
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.nf
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\fBzpool events\fR
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.fi
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.P
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to get a short list, and
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.P
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.nf
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\fBzpool events -v\fR
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.fi
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.P
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to get a full detail of the events and what information
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is available about it.
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.sp
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This man page lists the different subclasses that are issued
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in the case of an event. The full event name would be
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\fIereport.fs.zfs.SUBCLASS\fR, but we only list the last
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part here.
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.SS "EVENTS (SUBCLASS)"
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.sp
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.LP
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.sp
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.ne 2
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.na
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|
\fBchecksum\fR
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.ad
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.RS 12n
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Issued when a checksum error has been detected.
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.RE
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.sp
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.ne 2
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.na
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\fBio\fR
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.ad
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.RS 12n
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Issued when there is an I/O error in a vdev in the pool.
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.RE
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.sp
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.ne 2
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.na
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\fBdata\fR
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.ad
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.RS 12n
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Issued when there have been data errors in the pool.
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.RE
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.sp
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.ne 2
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.na
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\fBdeadman\fR
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.ad
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.RS 12n
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Issued when an I/O is determined to be "hung", this can be caused by lost
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completion events due to flaky hardware or drivers. See the
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\fBzfs_deadman_failmode\fR module option description for additional
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information regarding "hung" I/O detection and configuration.
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.RE
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.sp
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.ne 2
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.na
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\fBdelay\fR
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.ad
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.RS 12n
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Issued when a completed I/O exceeds the maximum allowed time specified
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by the \fBzio_delay_max\fR module option. This can be an indicator of
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problems with the underlying storage device.
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.RE
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.sp
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.ne 2
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.na
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\fBconfig.sync\fR
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.ad
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.RS 12n
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Issued every time a vdev change have been done to the pool.
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.RE
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.sp
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.ne 2
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.na
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\fBzpool\fR
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.ad
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.RS 12n
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Issued when a pool cannot be imported.
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.RE
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.sp
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.ne 2
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.na
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\fBzpool.destroy\fR
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.ad
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.RS 12n
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Issued when a pool is destroyed.
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.RE
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.sp
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.ne 2
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.na
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\fBzpool.export\fR
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.ad
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.RS 12n
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Issued when a pool is exported.
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.RE
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.sp
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.ne 2
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.na
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\fBzpool.import\fR
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.ad
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.RS 12n
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Issued when a pool is imported.
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.RE
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.sp
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.ne 2
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.na
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\fBzpool.reguid\fR
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.ad
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.RS 12n
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|
Issued when a REGUID (new unique identifier for the pool have been regenerated) have been detected.
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.RE
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.sp
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.ne 2
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.na
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\fBvdev.unknown\fR
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.ad
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.RS 12n
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|
Issued when the vdev is unknown. Such as trying to clear device
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errors on a vdev that have failed/been kicked from the system/pool
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and is no longer available.
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.RE
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|
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.sp
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.ne 2
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.na
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\fBvdev.open_failed\fR
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.ad
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.RS 12n
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Issued when a vdev could not be opened (because it didn't exist for example).
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.RE
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|
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.sp
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.ne 2
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.na
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\fBvdev.corrupt_data\fR
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|
.ad
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.RS 12n
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|
Issued when corrupt data have been detected on a vdev.
|
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.RE
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|
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.sp
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.ne 2
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.na
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\fBvdev.no_replicas\fR
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|
.ad
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.RS 12n
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|
Issued when there are no more replicas to sustain the pool.
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This would lead to the pool being \fIDEGRADED\fR.
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.RE
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|
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.sp
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.ne 2
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.na
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|
\fBvdev.bad_guid_sum\fR
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.ad
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.RS 12n
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|
Issued when a missing device in the pool have been detected.
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.RE
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.sp
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.ne 2
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.na
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\fBvdev.too_small\fR
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.ad
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.RS 12n
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Issued when the system (kernel) have removed a device, and ZFS
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notices that the device isn't there any more. This is usually
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followed by a \fBprobe_failure\fR event.
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.RE
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.sp
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.ne 2
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.na
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\fBvdev.bad_label\fR
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.ad
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.RS 12n
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Issued when the label is OK but invalid.
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.RE
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.sp
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.ne 2
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.na
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\fBvdev.bad_ashift\fR
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.ad
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.RS 12n
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Issued when the ashift alignment requirement has increased.
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.RE
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.sp
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.ne 2
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.na
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\fBvdev.remove\fR
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.ad
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.RS 12n
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Issued when a vdev is detached from a mirror (or a spare detached from a
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vdev where it have been used to replace a failed drive - only works if
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the original drive have been readded).
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.RE
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.sp
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.ne 2
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.na
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\fBvdev.clear\fR
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.ad
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.RS 12n
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Issued when clearing device errors in a pool. Such as running \fBzpool clear\fR
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on a device in the pool.
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.RE
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.sp
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.ne 2
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.na
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\fBvdev.check\fR
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.ad
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.RS 12n
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Issued when a check to see if a given vdev could be opened is started.
|
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.RE
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.sp
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.ne 2
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.na
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\fBvdev.spare\fR
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.ad
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.RS 12n
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|
Issued when a spare have kicked in to replace a failed device.
|
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.RE
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|
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|
.sp
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.ne 2
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.na
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\fBvdev.autoexpand\fR
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.ad
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.RS 12n
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|
Issued when a vdev can be automatically expanded.
|
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.RE
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|
|
|
.sp
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|
.ne 2
|
|
.na
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|
\fBio_failure\fR
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.ad
|
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.RS 12n
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|
Issued when there is an I/O failure in a vdev in the pool.
|
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.RE
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|
|
|
.sp
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.ne 2
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.na
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|
\fBprobe_failure\fR
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.ad
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.RS 12n
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|
Issued when a probe fails on a vdev. This would occur if a vdev
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have been kicked from the system outside of ZFS (such as the kernel
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have removed the device).
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBlog_replay\fR
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.ad
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.RS 12n
|
|
Issued when the intent log cannot be replayed. The can occur in the case
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of a missing or damaged log device.
|
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.RE
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|
|
|
.sp
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|
.ne 2
|
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.na
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|
\fBresilver.start\fR
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.ad
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.RS 12n
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|
Issued when a resilver is started.
|
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.RE
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.sp
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.ne 2
|
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.na
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\fBresilver.finish\fR
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.ad
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.RS 12n
|
|
Issued when the running resilver have finished.
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.RE
|
|
|
|
.sp
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|
.ne 2
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.na
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|
\fBscrub.start\fR
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.ad
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.RS 12n
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|
Issued when a scrub is started on a pool.
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.RE
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|
.sp
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|
.ne 2
|
|
.na
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|
\fBscrub.finish\fR
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|
.ad
|
|
.RS 12n
|
|
Issued when a pool has finished scrubbing.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBscrub.abort\fR
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.ad
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|
.RS 12n
|
|
Issued when a scrub is aborted on a pool.
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.RE
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|
|
|
.sp
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|
.ne 2
|
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.na
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|
\fBscrub.resume\fR
|
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.ad
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.RS 12n
|
|
Issued when a scrub is resumed on a pool.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBscrub.paused\fR
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|
.ad
|
|
.RS 12n
|
|
Issued when a scrub is paused on a pool.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBbootfs.vdev.attach\fR
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|
.ad
|
|
.RS 12n
|
|
.RE
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|
|
.SS "PAYLOADS"
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.sp
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.LP
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|
This is the payload (data, information) that accompanies an
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event.
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.sp
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|
For
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.BR zed (8),
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these are set to uppercase and prefixed with \fBZEVENT_\fR.
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|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBpool\fR
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|
.ad
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|
.RS 12n
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|
Pool name.
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.RE
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|
|
.sp
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|
.ne 2
|
|
.na
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|
\fBpool_failmode\fR
|
|
.ad
|
|
.RS 12n
|
|
Failmode - \fBwait\fR, \fBcontinue\fR or \fBpanic\fR.
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See
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.BR pool (8)
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(\fIfailmode\fR property) for more information.
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.RE
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|
|
.sp
|
|
.ne 2
|
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.na
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\fBpool_guid\fR
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.ad
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.RS 12n
|
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The GUID of the pool.
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.RE
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|
|
.sp
|
|
.ne 2
|
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.na
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|
\fBpool_context\fR
|
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.ad
|
|
.RS 12n
|
|
The load state for the pool (0=none, 1=open, 2=import, 3=tryimport, 4=recover
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5=error).
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|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_guid\fR
|
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.ad
|
|
.RS 12n
|
|
The GUID of the vdev in question (the vdev failing or operated upon with
|
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\fBzpool clear\fR etc).
|
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.RE
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|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_type\fR
|
|
.ad
|
|
.RS 12n
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|
Type of vdev - \fBdisk\fR, \fBfile\fR, \fBmirror\fR etc. See
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.BR zpool (8)
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under \fBVirtual Devices\fR for more information on possible values.
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.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_path\fR
|
|
.ad
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|
.RS 12n
|
|
Full path of the vdev, including any \fI-partX\fR.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_devid\fR
|
|
.ad
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|
.RS 12n
|
|
ID of vdev (if any).
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.RE
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|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_fru\fR
|
|
.ad
|
|
.RS 12n
|
|
Physical FRU location.
|
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.RE
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|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_state\fR
|
|
.ad
|
|
.RS 12n
|
|
State of vdev (0=uninitialized, 1=closed, 2=offline, 3=removed, 4=failed to open, 5=faulted, 6=degraded, 7=healthy).
|
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.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_ashift\fR
|
|
.ad
|
|
.RS 12n
|
|
The ashift value of the vdev.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_complete_ts\fR
|
|
.ad
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|
.RS 12n
|
|
The time the last I/O completed for the specified vdev.
|
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.RE
|
|
|
|
.sp
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|
.ne 2
|
|
.na
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|
\fBvdev_delta_ts\fR
|
|
.ad
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|
.RS 12n
|
|
The time since the last I/O completed for the specified vdev.
|
|
.RE
|
|
|
|
.sp
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|
.ne 2
|
|
.na
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|
\fBvdev_spare_paths\fR
|
|
.ad
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|
.RS 12n
|
|
List of spares, including full path and any \fI-partX\fR.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_spare_guids\fR
|
|
.ad
|
|
.RS 12n
|
|
GUID(s) of spares.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_read_errors\fR
|
|
.ad
|
|
.RS 12n
|
|
How many read errors that have been detected on the vdev.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBvdev_write_errors\fR
|
|
.ad
|
|
.RS 12n
|
|
How many write errors that have been detected on the vdev.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBvdev_cksum_errors\fR
|
|
.ad
|
|
.RS 12n
|
|
How many checkum errors that have been detected on the vdev.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBparent_guid\fR
|
|
.ad
|
|
.RS 12n
|
|
GUID of the vdev parent.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
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|
\fBparent_type\fR
|
|
.ad
|
|
.RS 12n
|
|
Type of parent. See \fBvdev_type\fR.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBparent_path\fR
|
|
.ad
|
|
.RS 12n
|
|
Path of the vdev parent (if any).
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBparent_devid\fR
|
|
.ad
|
|
.RS 12n
|
|
ID of the vdev parent (if any).
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_objset\fR
|
|
.ad
|
|
.RS 12n
|
|
The object set number for a given I/O.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_object\fR
|
|
.ad
|
|
.RS 12n
|
|
The object number for a given I/O.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_level\fR
|
|
.ad
|
|
.RS 12n
|
|
The block level for a given I/O.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_blkid\fR
|
|
.ad
|
|
.RS 12n
|
|
The block ID for a given I/O.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_err\fR
|
|
.ad
|
|
.RS 12n
|
|
The errno for a failure when handling a given I/O.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_offset\fR
|
|
.ad
|
|
.RS 12n
|
|
The offset in bytes of where to write the I/O for the specified vdev.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_size\fR
|
|
.ad
|
|
.RS 12n
|
|
The size in bytes of the I/O.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_flags\fR
|
|
.ad
|
|
.RS 12n
|
|
The current flags describing how the I/O should be handled. See the
|
|
\fBI/O FLAGS\fR section for the full list of I/O flags.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_stage\fR
|
|
.ad
|
|
.RS 12n
|
|
The current stage of the I/O in the pipeline. See the \fBI/O STAGES\fR
|
|
section for a full list of all the I/O stages.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_pipeline\fR
|
|
.ad
|
|
.RS 12n
|
|
The valid pipeline stages for the I/O. See the \fBI/O STAGES\fR section for a
|
|
full list of all the I/O stages.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_delay\fR
|
|
.ad
|
|
.RS 12n
|
|
The time in ticks (HZ) required for the block layer to service the I/O. Unlike
|
|
\fBzio_delta\fR this does not include any vdev queuing time and is therefore
|
|
solely a measure of the block layer performance. On most modern Linux systems
|
|
HZ is defined as 1000 making a tick equivalent to 1 millisecond.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_timestamp\fR
|
|
.ad
|
|
.RS 12n
|
|
The time when a given I/O was submitted.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBzio_delta\fR
|
|
.ad
|
|
.RS 12n
|
|
The time required to service a given I/O.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBprev_state\fR
|
|
.ad
|
|
.RS 12n
|
|
The previous state of the vdev.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBcksum_expected\fR
|
|
.ad
|
|
.RS 12n
|
|
The expected checksum value.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBcksum_actual\fR
|
|
.ad
|
|
.RS 12n
|
|
The actual/current checksum value.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBcksum_algorithm\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum algorithm used. See \fBzfs\fR(8) for more information on checksum algorithms available.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBcksum_byteswap\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum value is byte swapped.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBbad_ranges\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum bad offset ranges.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBbad_ranges_min_gap\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum allowed minimum gap.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBbad_range_sets\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum for each range the number of bits set.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBbad_range_clears\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum for each range the number of bits cleared.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBbad_set_bits\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum array of bits set.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBbad_cleared_bits\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum array of bits cleared.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBbad_set_histogram\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum histogram of set bits by bit number in a 64-bit word.
|
|
.RE
|
|
|
|
.sp
|
|
.ne 2
|
|
.na
|
|
\fBbad_cleared_histogram\fR
|
|
.ad
|
|
.RS 12n
|
|
Checksum histogram of cleared bits by bit number in a 64-bit word.
|
|
.RE
|
|
|
|
.SS "I/O STAGES"
|
|
.sp
|
|
.LP
|
|
The ZFS I/O pipeline is comprised of various stages which are defined
|
|
below. The individual stages are used to construct these basic I/O
|
|
operations: Read, Write, Free, Claim, and Ioctl. These stages may be
|
|
set on an event to describe the life cycle of a given I/O.
|
|
|
|
.TS
|
|
tab(:);
|
|
l l l .
|
|
Stage:Bit Mask:Operations
|
|
_:_:_
|
|
ZIO_STAGE_OPEN:0x00000001:RWFCI
|
|
|
|
ZIO_STAGE_READ_BP_INIT:0x00000002:R----
|
|
ZIO_STAGE_FREE_BP_INIT:0x00000004:--F--
|
|
ZIO_STAGE_ISSUE_ASYNC:0x00000008:RWF--
|
|
ZIO_STAGE_WRITE_BP_INIT:0x00000010:-W---
|
|
|
|
ZIO_STAGE_CHECKSUM_GENERATE:0x00000020:-W---
|
|
|
|
ZIO_STAGE_NOP_WRITE:0x00000040:-W---
|
|
|
|
ZIO_STAGE_DDT_READ_START:0x00000080:R----
|
|
ZIO_STAGE_DDT_READ_DONE:0x00000100:R----
|
|
ZIO_STAGE_DDT_WRITE:0x00000200:-W---
|
|
ZIO_STAGE_DDT_FREE:0x00000400:--F--
|
|
|
|
ZIO_STAGE_GANG_ASSEMBLE:0x00000800:RWFC-
|
|
ZIO_STAGE_GANG_ISSUE:0x00001000:RWFC-
|
|
|
|
ZIO_STAGE_DVA_ALLOCATE:0x00002000:-W---
|
|
ZIO_STAGE_DVA_FREE:0x00004000:--F--
|
|
ZIO_STAGE_DVA_CLAIM:0x00008000:---C-
|
|
|
|
ZIO_STAGE_READY:0x00010000:RWFCI
|
|
|
|
ZIO_STAGE_VDEV_IO_START:0x00020000:RW--I
|
|
ZIO_STAGE_VDEV_IO_DONE:0x00040000:RW--I
|
|
ZIO_STAGE_VDEV_IO_ASSESS:0x00080000:RW--I
|
|
|
|
ZIO_STAGE_CHECKSUM_VERIFY0:0x00100000:R----
|
|
|
|
ZIO_STAGE_DONE:0x00200000:RWFCI
|
|
.TE
|
|
|
|
.SS "I/O FLAGS"
|
|
.sp
|
|
.LP
|
|
Every I/O in the pipeline contains a set of flags which describe its
|
|
function and are used to govern its behavior. These flags will be set
|
|
in an event as an \fBzio_flags\fR payload entry.
|
|
|
|
.TS
|
|
tab(:);
|
|
l l .
|
|
Flag:Bit Mask
|
|
_:_
|
|
ZIO_FLAG_DONT_AGGREGATE:0x00000001
|
|
ZIO_FLAG_IO_REPAIR:0x00000002
|
|
ZIO_FLAG_SELF_HEAL:0x00000004
|
|
ZIO_FLAG_RESILVER:0x00000008
|
|
ZIO_FLAG_SCRUB:0x00000010
|
|
ZIO_FLAG_SCAN_THREAD:0x00000020
|
|
ZIO_FLAG_PHYSICAL:0x00000040
|
|
|
|
ZIO_FLAG_CANFAIL:0x00000080
|
|
ZIO_FLAG_SPECULATIVE:0x00000100
|
|
ZIO_FLAG_CONFIG_WRITER:0x00000200
|
|
ZIO_FLAG_DONT_RETRY:0x00000400
|
|
ZIO_FLAG_DONT_CACHE:0x00000800
|
|
ZIO_FLAG_NODATA:0x00001000
|
|
ZIO_FLAG_INDUCE_DAMAGE:0x00002000
|
|
|
|
ZIO_FLAG_IO_RETRY:0x00004000
|
|
ZIO_FLAG_PROBE:0x00008000
|
|
ZIO_FLAG_TRYHARD:0x00010000
|
|
ZIO_FLAG_OPTIONAL:0x00020000
|
|
|
|
ZIO_FLAG_DONT_QUEUE:0x00040000
|
|
ZIO_FLAG_DONT_PROPAGATE:0x00080000
|
|
ZIO_FLAG_IO_BYPASS:0x00100000
|
|
ZIO_FLAG_IO_REWRITE:0x00200000
|
|
ZIO_FLAG_RAW:0x00400000
|
|
ZIO_FLAG_GANG_CHILD:0x00800000
|
|
ZIO_FLAG_DDT_CHILD:0x01000000
|
|
ZIO_FLAG_GODFATHER:0x02000000
|
|
ZIO_FLAG_NOPWRITE:0x04000000
|
|
ZIO_FLAG_REEXECUTED:0x08000000
|
|
ZIO_FLAG_DELEGATED:0x10000000
|
|
ZIO_FLAG_FASTWRITE:0x20000000
|
|
.TE
|