FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/etc/default/zfs.in

     # OpenZFS userland configuration.
     # shellcheck disable=SC2154
     
     # NOTE: This file is intended for sysv init and initramfs.
     # Changing some of these settings may not make any difference on
     # systemd-based setup, e.g. setting ZFS_MOUNT=no will not prevent systemd
     # from launching zfs-mount.service during boot.
     # See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901436
     
    # To enable a boolean setting, set it to yes, on, true, or 1.
    # Anything else will be interpreted as unset.
    # shellcheck disable=SC2034
    
    # Run `zfs load-key` during system start?
    ZFS_LOAD_KEY='yes'
    
    # Run `zfs unload-key` during system stop?
    ZFS_UNLOAD_KEY='no'
    
    # Run `zfs mount -a` during system start?
    ZFS_MOUNT='yes'
    
    # Run `zfs unmount -a` during system stop?
    ZFS_UNMOUNT='yes'
    
    # Run `zfs share -a` during system start?
    # nb: The shareiscsi, sharenfs, and sharesmb dataset properties.
    ZFS_SHARE='yes'
    
    # Run `zfs unshare -a` during system stop?
    ZFS_UNSHARE='yes'
    
    # By default, a verbatim import of all pools is performed at boot based on the
    # contents of the default zpool cache file.  The contents of the cache are
    # managed automatically by the 'zpool import' and 'zpool export' commands.
    #
    # By setting this to 'yes', the system will instead search all devices for
    # pools and attempt to import them all at boot, even those that have been
    # exported.  Under this mode, the search path can be controlled by the
    # ZPOOL_IMPORT_PATH variable and a list of pools that should not be imported
    # can be listed in the ZFS_POOL_EXCEPTIONS variable.
    #
    # Note that importing all visible pools may include pools that you don't
    # expect, such as those on removable devices and SANs, and those pools may
    # proceed to mount themselves in places you do not want them to.  The results
    # can be unpredictable and possibly dangerous.  Only enable this option if you
    # understand this risk and have complete physical control over your system and
    # SAN to prevent the insertion of malicious pools.
    ZPOOL_IMPORT_ALL_VISIBLE='no'
    
    # Specify specific path(s) to look for device nodes and/or links for the
    # pool import(s). See zpool(8) for more information about this variable.
    # It supersedes the old USE_DISK_BY_ID which indicated that it would only
    # try '/dev/disk/by-id'.
    # The old variable will still work in the code, but is deprecated.
    #ZPOOL_IMPORT_PATH="/dev/disk/by-vdev:/dev/disk/by-id"
    
    # List of pools that should NOT be imported at boot
    # when ZPOOL_IMPORT_ALL_VISIBLE is 'yes'.
    # This is a space separated list.
    #ZFS_POOL_EXCEPTIONS="test2"
    
    # Should the datasets be mounted verbosely?
    # A mount counter will be used when mounting if set to 'yes'.
    VERBOSE_MOUNT='no'
    
    # Should we allow overlay mounts?
    # This is standard in Linux, but not ZFS which comes from Solaris where this
    # is not allowed).
    DO_OVERLAY_MOUNTS='no'
    
    # Any additional option to the 'zfs import' commandline?
    # Include '-o' for each option wanted.
    # You don't need to put '-f' in here, unless you want it ALL the time.
    # Using the option 'zfsforce=1' on the grub/kernel command line will
    # do the same, but on a case-to-case basis.
    ZPOOL_IMPORT_OPTS=""
    
    # Full path to the ZFS cache file?
    # See "cachefile" in zpool(8).
    # The default is "@sysconfdir@/zfs/zpool.cache".
    #ZPOOL_CACHE="@sysconfdir@/zfs/zpool.cache"
    #
    # Setting ZPOOL_CACHE to an empty string ('') AND setting ZPOOL_IMPORT_OPTS to
    # "-c @sysconfdir@/zfs/zpool.cache" will _enforce_ the use of a cache file.
    # This is needed in some cases (extreme amounts of VDEVs, multipath etc).
    # Generally, the use of a cache file is usually not recommended on Linux
    # because it sometimes is more trouble than it's worth (laptops with external
    # devices or when/if device nodes changes names).
    #ZPOOL_IMPORT_OPTS="-c @sysconfdir@/zfs/zpool.cache"
    #ZPOOL_CACHE=""
    
    # Any additional option to the 'zfs mount' command line?
    # Include '-o' for each option wanted.
    MOUNT_EXTRA_OPTIONS=""
    
    # Build kernel modules with the --enable-debug switch?
    # Only applicable for Debian GNU/Linux {dkms,initramfs}.
    ZFS_DKMS_ENABLE_DEBUG='no'
   
   # Build kernel modules with the --enable-debuginfo switch?
   # Only applicable for Debian GNU/Linux {dkms,initramfs}.
   ZFS_DKMS_ENABLE_DEBUGINFO='no'
   
   # Keep debugging symbols in kernel modules?
   # Only applicable for Debian GNU/Linux {dkms,initramfs}.
   ZFS_DKMS_DISABLE_STRIP='no'
   
   # Optional arguments for the ZFS Event Daemon (ZED).
   # See zed(8) for more information on available options.
   #ZED_ARGS="-M"

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