NAME

     zfs-jail — attach or detach ZFS filesystem from FreeBSD jail

SYNOPSIS

     zfs jail jailid|jailname filesystem
     zfs unjail jailid|jailname filesystem

DESCRIPTION

     zfs jail jailid|jailname filesystem
       Attach the specified filesystem to the jail identified by JID jailid or name jailname.
       From now on this file system tree can be managed from within a jail if the jailed property
       has been set.  To use this functionality, the jail needs the allow.mount and
       allow.mount.zfs parameters set to 1 and the enforce_statfs parameter set to a value lower
       than 2.

       You cannot attach a jailed dataset's children to another jail.  You can also not attach
       the root file system of the jail or any dataset which needs to be mounted before the zfs
       rc script is run inside the jail, as it would be attached unmounted until it is mounted
       from the rc script inside the jail.

       To allow management of the dataset from within a jail, the jailed property has to be set
       and the jail needs access to the /dev/zfs device.  The quota property cannot be changed
       from within a jail.

       After a dataset is attached to a jail and the jailed property is set, a jailed file system
       cannot be mounted outside the jail, since the jail administrator might have set the mount
       point to an unacceptable value.

       See jail(8) for more information on managing jails.  Jails are a FreeBSD feature and are
       not relevant on other platforms.

     zfs unjail jailid|jailname filesystem
       Detaches the specified filesystem from the jail identified by JID jailid or name jailname.

SEE ALSO

     zfsprops(7), jail(8)