--- /dev/null
+'\" t
+.\"
+.\" CDDL HEADER START
+.\"
+.\" The contents of this file are subject to the terms of the
+.\" Common Development and Distribution License (the "License").
+.\" You may not use this file except in compliance with the License.
+.\"
+.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+.\" or http://www.opensolaris.org/os/licensing.
+.\" See the License for the specific language governing permissions
+.\" and limitations under the License.
+.\"
+.\" When distributing Covered Code, include this CDDL HEADER in each
+.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+.\" If applicable, add the following below this CDDL HEADER, with the
+.\" fields enclosed by brackets "[]" replaced with your own identifying
+.\" information: Portions Copyright [yyyy] [name of copyright owner]
+.\"
+.\" CDDL HEADER END
+.\"
+.\"
+.\" Copyright 2013 Darik Horn <dajhorn@vanadac.com>. All rights reserved.
+.\"
+.TH zhack 1 "2013 MAR 16" "ZFS on Linux" "User Commands"
+.SH NAME
+.BR zhack " \- libzpool debugging tool"
+.SH DESCRIPTION
+This utility pokes configuration changes directly into a ZFS pool,
+which is dangerous and can cause data corruption.
+.SH SYNOPSIS
+.LP
+.BI "zhack [\-c " "cachefile" "] [\-d " "dir" "] <" "subcommand" "> [" "arguments" "]"
+.SH OPTIONS
+.HP
+.BI "\-c" " cachefile"
+.IP
+Read the \fIpool\fR configuration from the \fIcachefile\fR, which is
+/etc/zfs/zpool.cache by default.
+.HP
+.BI "\-d" " dir"
+.IP
+Search for \fIpool\fR members in the \fIdir\fR path. Can be specified
+more than once.
+.SH SUBCOMMANDS
+.LP
+.BI "feature stat " "pool"
+.IP
+List feature flags.
+.LP
+.BI "feature enable [\-d " "description" "] [\-r] " "pool guid"
+.IP
+Add a new feature to \fIpool\fR that is uniquely identified by
+\fIguid\fR, which is specified in the same form as a zfs(8) user
+property.
+.IP
+The \fIdescription\fR is a short human readable explanation of the new
+feature.
+.IP
+The \fB\-r\fR switch indicates that \fIpool\fR can be safely opened
+in read-only mode by a system that does not have the \fIguid\fR
+feature.
+.LP
+.BI "feature ref [\-d|\-m] " "pool guid"
+.IP
+Increment the reference count of the \fIguid\fR feature in \fIpool\fR.
+.IP
+The \fB\-d\fR switch decrements the reference count of the \fIguid\fR
+feature in \fIpool\fR.
+.IP
+The \fB\-m\fR switch indicates that the \fIguid\fR feature is now
+required to read the pool MOS.
+.SH EXAMPLES
+.LP
+.nf
+# zhack feature stat tank
+
+for_read_obj:
+ org.illumos:lz4_compress = 0
+for_write_obj:
+ com.delphix:async_destroy = 0
+ com.delphix:empty_bpobj = 0
+descriptions_obj:
+ com.delphix:async_destroy = Destroy filesystems asynchronously.
+ com.delphix:empty_bpobj = Snapshots use less space.
+ org.illumos:lz4_compress = LZ4 compression algorithm support.
+.LP
+# zhack feature enable -d 'Predict future disk failures.' \\
+ tank com.example:clairvoyance
+.LP
+# zhack feature ref tank com.example:clairvoyance
+.SH AUTHORS
+This man page was written by Darik Horn <dajhorn@vanadac.com>.
+.SH SEE ALSO
+.BR splat (1),
+.BR zfs (8),
+.BR zpios (1),
+.BR zpool-features (5),
+.BR ztest (1)
--- /dev/null
+'\" t
+.\"
+.\" CDDL HEADER START
+.\"
+.\" The contents of this file are subject to the terms of the
+.\" Common Development and Distribution License (the "License").
+.\" You may not use this file except in compliance with the License.
+.\"
+.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+.\" or http://www.opensolaris.org/os/licensing.
+.\" See the License for the specific language governing permissions
+.\" and limitations under the License.
+.\"
+.\" When distributing Covered Code, include this CDDL HEADER in each
+.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+.\" If applicable, add the following below this CDDL HEADER, with the
+.\" fields enclosed by brackets "[]" replaced with your own identifying
+.\" information: Portions Copyright [yyyy] [name of copyright owner]
+.\"
+.\" CDDL HEADER END
+.\"
+.\"
+.\" Copyright 2013 Darik Horn <dajhorn@vanadac.com>. All rights reserved.
+.\"
+.TH fsck.zfs 8 "2013 MAR 16" "ZFS on Linux" "System Administration Commands"
+
+.SH NAME
+.BR fsck.zfs " \- Dummy ZFS filesystem checker."
+
+.SH SYNOPSIS
+.LP
+.BI "fsck.zfs [" "options" "] <" "dataset" ">"
+
+.SH DESCRIPTION
+.LP
+\fBfsck.zfs\fR is a shell stub that does nothing and always returns
+true. It is installed by ZoL because some Linux distributions expect
+a fsck helper for all filesystems.
+
+.SH OPTIONS
+.HP
+All \fIoptions\fR and the \fIdataset\fR are ignored.
+
+.SH "NOTES"
+.LP
+ZFS datasets are checked by running \fBzpool scrub\fR on the
+containing pool. An individual ZFS dataset is never checked
+independently of its pool, which is unlike a regular filesystem.
+
+.SH "BUGS"
+.LP
+On some systems, if the \fIdataset\fR is in a degraded pool, then it
+might be appropriate for \fBfsck.zfs\fR to return exit code 4 to
+indicate an uncorrected filesystem error.
+.LP
+Similarly, if the \fIdataset\fR is in a faulted pool and has a legacy
+/etc/fstab record, then \fBfsck.zfs\fR should return exit code 8 to
+indicate a fatal operational error.
+
+.SH "AUTHORS"
+.LP
+Darik Horn <dajhorn@vanadac.com>.
+
+.SH "SEE ALSO"
+.BR fsck (8),
+.BR fstab (5),
+.BR zpool (8)
projects / mirror_zfs-debian.git / commitdiff