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mirror_zfs/man/man8/zfs-allow.8
szubersk b46be903fb Ubuntu 22.04 integration: mancheck 
Correct new mandoc errors.
```
STYLE: input text line longer than 80 bytes
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Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #14148
2022-11-18 11:26:41 -08:00

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.\"
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.\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
.\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
.\" Copyright (c) 2011, 2019 by Delphix. All rights reserved.
.\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
.\" Copyright (c) 2014, Joyent, Inc. All rights reserved.
.\" Copyright (c) 2014 by Adam Stevko. All rights reserved.
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.Dd March 16, 2022
.Dt ZFS-ALLOW 8
.Os
.
.Sh NAME
.Nm zfs-allow
.Nd delegate ZFS administration permissions to unprivileged users
.Sh SYNOPSIS
.Nm zfs
.Cm allow
.Op Fl dglu
.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns …
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm allow
.Op Fl dl
.Fl e Ns | Ns Sy everyone
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns …
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm allow
.Fl c
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns …
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm allow
.Fl s No @ Ns Ar setname
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns …
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm unallow
.Op Fl dglru
.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns … Oc
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm unallow
.Op Fl dlr
.Fl e Ns | Ns Sy everyone
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns … Oc
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm unallow
.Op Fl r
.Fl c
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns … Oc
.Ar filesystem Ns | Ns Ar volume
.Nm zfs
.Cm unallow
.Op Fl r
.Fl s No @ Ns Ar setname
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns … Oc
.Ar filesystem Ns | Ns Ar volume
.
.Sh DESCRIPTION
.Bl -tag -width ""
.It Xo
.Nm zfs
.Cm allow
.Ar filesystem Ns | Ns Ar volume
.Xc
Displays permissions that have been delegated on the specified filesystem or
volume.
See the other forms of
.Nm zfs Cm allow
for more information.
.Pp
Delegations are supported under Linux with the exception of
.Sy mount ,
.Sy unmount ,
.Sy mountpoint ,
.Sy canmount ,
.Sy rename ,
and
.Sy share .
These permissions cannot be delegated because the Linux
.Xr mount 8
command restricts modifications of the global namespace to the root user.
.It Xo
.Nm zfs
.Cm allow
.Op Fl dglu
.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns …
.Ar filesystem Ns | Ns Ar volume
.Xc
.It Xo
.Nm zfs
.Cm allow
.Op Fl dl
.Fl e Ns | Ns Sy everyone
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns …
.Ar filesystem Ns | Ns Ar volume
.Xc
Delegates ZFS administration permission for the file systems to non-privileged
users.
.Bl -tag -width "-d"
.It Fl d
Allow only for the descendent file systems.
.It Fl e Ns | Ns Sy everyone
Specifies that the permissions be delegated to everyone.
.It Fl g Ar group Ns Oo , Ns Ar group Oc Ns …
Explicitly specify that permissions are delegated to the group.
.It Fl l
Allow
.Qq locally
only for the specified file system.
.It Fl u Ar user Ns Oo , Ns Ar user Oc Ns …
Explicitly specify that permissions are delegated to the user.
.It Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
Specifies to whom the permissions are delegated.
Multiple entities can be specified as a comma-separated list.
If neither of the
.Fl gu
options are specified, then the argument is interpreted preferentially as the
keyword
.Sy everyone ,
then as a user name, and lastly as a group name.
To specify a user or group named
.Qq everyone ,
use the
.Fl g
or
.Fl u
options.
To specify a group with the same name as a user, use the
.Fl g
options.
.It Xo
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns …
.Xc
The permissions to delegate.
Multiple permissions may be specified as a comma-separated list.
Permission names are the same as ZFS subcommand and property names.
See the property list below.
Property set names, which begin with
.Sy @ ,
may be specified.
See the
.Fl s
form below for details.
.El
.Pp
If neither of the
.Fl dl
options are specified, or both are, then the permissions are allowed for the
file system or volume, and all of its descendents.
.Pp
Permissions are generally the ability to use a ZFS subcommand or change a ZFS
property.
The following permissions are available:
.TS
l l l .
NAME TYPE NOTES
_ _ _
allow subcommand Must also have the permission that is being allowed
bookmark subcommand
clone subcommand Must also have the \fBcreate\fR ability and \fBmount\fR ability in the origin file system
create subcommand Must also have the \fBmount\fR ability. Must also have the \fBrefreservation\fR ability to create a non-sparse volume.
destroy subcommand Must also have the \fBmount\fR ability
diff subcommand Allows lookup of paths within a dataset given an object number, and the ability to create snapshots necessary to \fBzfs diff\fR.
hold subcommand Allows adding a user hold to a snapshot
load-key subcommand Allows loading and unloading of encryption key (see \fBzfs load-key\fR and \fBzfs unload-key\fR).
change-key subcommand Allows changing an encryption key via \fBzfs change-key\fR.
mount subcommand Allows mounting/umounting ZFS datasets
promote subcommand Must also have the \fBmount\fR and \fBpromote\fR ability in the origin file system
receive subcommand Must also have the \fBmount\fR and \fBcreate\fR ability
release subcommand Allows releasing a user hold which might destroy the snapshot
rename subcommand Must also have the \fBmount\fR and \fBcreate\fR ability in the new parent
rollback subcommand Must also have the \fBmount\fR ability
send subcommand
share subcommand Allows sharing file systems over NFS or SMB protocols
snapshot subcommand Must also have the \fBmount\fR ability
groupquota other Allows accessing any \fBgroupquota@\fI…\fR property
groupobjquota other Allows accessing any \fBgroupobjquota@\fI…\fR property
groupused other Allows reading any \fBgroupused@\fI…\fR property
groupobjused other Allows reading any \fBgroupobjused@\fI…\fR property
userprop other Allows changing any user property
userquota other Allows accessing any \fBuserquota@\fI…\fR property
userobjquota other Allows accessing any \fBuserobjquota@\fI…\fR property
userused other Allows reading any \fBuserused@\fI…\fR property
userobjused other Allows reading any \fBuserobjused@\fI…\fR property
projectobjquota other Allows accessing any \fBprojectobjquota@\fI…\fR property
projectquota other Allows accessing any \fBprojectquota@\fI…\fR property
projectobjused other Allows reading any \fBprojectobjused@\fI…\fR property
projectused other Allows reading any \fBprojectused@\fI…\fR property
aclinherit property
aclmode property
acltype property
atime property
canmount property
casesensitivity property
checksum property
compression property
context property
copies property
dedup property
defcontext property
devices property
dnodesize property
encryption property
exec property
filesystem_limit property
fscontext property
keyformat property
keylocation property
logbias property
mlslabel property
mountpoint property
nbmand property
normalization property
overlay property
pbkdf2iters property
primarycache property
quota property
readonly property
recordsize property
redundant_metadata property
refquota property
refreservation property
relatime property
reservation property
rootcontext property
secondarycache property
setuid property
sharenfs property
sharesmb property
snapdev property
snapdir property
snapshot_limit property
special_small_blocks property
sync property
utf8only property
version property
volblocksize property
volmode property
volsize property
vscan property
xattr property
zoned property
.TE
.It Xo
.Nm zfs
.Cm allow
.Fl c
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns …
.Ar filesystem Ns | Ns Ar volume
.Xc
Sets
.Qq create time
permissions.
These permissions are granted
.Pq locally
to the creator of any newly-created descendent file system.
.It Xo
.Nm zfs
.Cm allow
.Fl s No @ Ns Ar setname
.Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns …
.Ar filesystem Ns | Ns Ar volume
.Xc
Defines or adds permissions to a permission set.
The set can be used by other
.Nm zfs Cm allow
commands for the specified file system and its descendents.
Sets are evaluated dynamically, so changes to a set are immediately reflected.
Permission sets follow the same naming restrictions as ZFS file systems, but the
name must begin with
.Sy @ ,
and can be no more than 64 characters long.
.It Xo
.Nm zfs
.Cm unallow
.Op Fl dglru
.Ar user Ns | Ns Ar group Ns Oo , Ns Ar user Ns | Ns Ar group Oc Ns …
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns … Oc
.Ar filesystem Ns | Ns Ar volume
.Xc
.It Xo
.Nm zfs
.Cm unallow
.Op Fl dlr
.Fl e Ns | Ns Sy everyone
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns … Oc
.Ar filesystem Ns | Ns Ar volume
.Xc
.It Xo
.Nm zfs
.Cm unallow
.Op Fl r
.Fl c
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns … Oc
.Ar filesystem Ns | Ns Ar volume
.Xc
Removes permissions that were granted with the
.Nm zfs Cm allow
command.
No permissions are explicitly denied, so other permissions granted are still in
effect.
For example, if the permission is granted by an ancestor.
If no permissions are specified, then all permissions for the specified
.Ar user ,
.Ar group ,
or
.Sy everyone
are removed.
Specifying
.Sy everyone
.Po or using the
.Fl e
option
.Pc
only removes the permissions that were granted to everyone, not all permissions
for every user and group.
See the
.Nm zfs Cm allow
command for a description of the
.Fl ldugec
options.
.Bl -tag -width "-r"
.It Fl r
Recursively remove the permissions from this file system and all descendents.
.El
.It Xo
.Nm zfs
.Cm unallow
.Op Fl r
.Fl s No @ Ns Ar setname
.Oo Ar perm Ns | Ns @ Ns Ar setname Ns Oo , Ns Ar perm Ns | Ns @ Ns
.Ar setname Oc Ns … Oc
.Ar filesystem Ns | Ns Ar volume
.Xc
Removes permissions from a permission set.
If no permissions are specified, then all permissions are removed, thus removing
the set entirely.
.El
.
.Sh EXAMPLES
.\" These are, respectively, examples 17, 18, 19, 20 from zfs.8
.\" Make sure to update them bidirectionally
.Ss Example 1 : No Delegating ZFS Administration Permissions on a ZFS Dataset
The following example shows how to set permissions so that user
.Ar cindys
can create, destroy, mount, and take snapshots on
.Ar tank/cindys .
The permissions on
.Ar tank/cindys
are also displayed.
.Bd -literal -compact -offset Ds
.No # Nm zfs Cm allow Sy cindys create , Ns Sy destroy , Ns Sy mount , Ns Sy snapshot Ar tank/cindys
.No # Nm zfs Cm allow Ar tank/cindys
---- Permissions on tank/cindys --------------------------------------
Local+Descendent permissions:
user cindys create,destroy,mount,snapshot
.Ed
.Pp
Because the
.Ar tank/cindys
mount point permission is set to 755 by default, user
.Ar cindys
will be unable to mount file systems under
.Ar tank/cindys .
Add an ACE similar to the following syntax to provide mount point access:
.Dl # Cm chmod No A+user : Ns Ar cindys Ns :add_subdirectory:allow Ar /tank/cindys
.
.Ss Example 2 : No Delegating Create Time Permissions on a ZFS Dataset
The following example shows how to grant anyone in the group
.Ar staff
to create file systems in
.Ar tank/users .
This syntax also allows staff members to destroy their own file systems, but not
destroy anyone else's file system.
The permissions on
.Ar tank/users
are also displayed.
.Bd -literal -compact -offset Ds
.No # Nm zfs Cm allow Ar staff Sy create , Ns Sy mount Ar tank/users
.No # Nm zfs Cm allow Fl c Sy destroy Ar tank/users
.No # Nm zfs Cm allow Ar tank/users
---- Permissions on tank/users ---------------------------------------
Permission sets:
destroy
Local+Descendent permissions:
group staff create,mount
.Ed
.
.Ss Example 3 : No Defining and Granting a Permission Set on a ZFS Dataset
The following example shows how to define and grant a permission set on the
.Ar tank/users
file system.
The permissions on
.Ar tank/users
are also displayed.
.Bd -literal -compact -offset Ds
.No # Nm zfs Cm allow Fl s No @ Ns Ar pset Sy create , Ns Sy destroy , Ns Sy snapshot , Ns Sy mount Ar tank/users
.No # Nm zfs Cm allow staff No @ Ns Ar pset tank/users
.No # Nm zfs Cm allow Ar tank/users
---- Permissions on tank/users ---------------------------------------
Permission sets:
@pset create,destroy,mount,snapshot
Local+Descendent permissions:
group staff @pset
.Ed
.
.Ss Example 4 : No Delegating Property Permissions on a ZFS Dataset
The following example shows to grant the ability to set quotas and reservations
on the
.Ar users/home
file system.
The permissions on
.Ar users/home
are also displayed.
.Bd -literal -compact -offset Ds
.No # Nm zfs Cm allow Ar cindys Sy quota , Ns Sy reservation Ar users/home
.No # Nm zfs Cm allow Ar users/home
---- Permissions on users/home ---------------------------------------
Local+Descendent permissions:
user cindys quota,reservation
cindys% zfs set quota=10G users/home/marks
cindys% zfs get quota users/home/marks
NAME PROPERTY VALUE SOURCE
users/home/marks quota 10G local
.Ed
.
.Ss Example 5 : No Removing ZFS Delegated Permissions on a ZFS Dataset
The following example shows how to remove the snapshot permission from the
.Ar staff
group on the
.Sy tank/users
file system.
The permissions on
.Sy tank/users
are also displayed.
.Bd -literal -compact -offset Ds
.No # Nm zfs Cm unallow Ar staff Sy snapshot Ar tank/users
.No # Nm zfs Cm allow Ar tank/users
---- Permissions on tank/users ---------------------------------------
Permission sets:
@pset create,destroy,mount,snapshot
Local+Descendent permissions:
group staff @pset
.Ed
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