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ZFS-ALLOW(8) System Manager's Manual ZFS-ALLOW(8) NAME zfs-allow -- delegate ZFS administration permissions to unprivileged users SYNOPSIS zfs allow [-dglu] user|group[,user|group] perm|@setname[,perm|@setname] filesystem|volume zfs allow [-dl] -e|everyone perm|@setname[,perm|@setname] filesystem|volume zfs allow -c perm|@setname[,perm|@setname] filesystem|volume zfs allow -s @setname perm|@setname[,perm|@setname] filesystem|volume zfs unallow [-dglru] user|group[,user|group] [perm|@setname[,perm|@setname]] filesystem|volume zfs unallow [-dlr] -e|everyone [perm|@setname[,perm|@setname]] filesystem|volume zfs unallow [-r] -c [perm|@setname[,perm|@setname]] filesystem|volume zfs unallow [-r] -s @setname [perm|@setname[,perm|@setname]] filesystem|volume DESCRIPTION zfs allow filesystem|volume Displays permissions that have been delegated on the specified filesystem or volume. See the other forms of zfs allow for more in- formation. Delegations are supported under Linux with the exception of mount, unmount, mountpoint, canmount, rename, and share. These permissions cannot be delegated because the Linux mount(8) command restricts mod- ifications of the global namespace to the root user. zfs allow [-dglu] user|group[,user|group] perm|@setname[,perm|@setname] filesystem|volume zfs allow [-dl] -e|everyone perm|@setname[,perm|@setname] filesystem|volume Delegates ZFS administration permission for the file systems to non- privileged users. -d Allow only for the descendent file systems. -e|everyone Specifies that the permissions be delegated to everyone. -g group[,group] Explicitly specify that permissions are delegated to the group. -l Allow "locally" only for the specified file system. -u user[,user] Explicitly specify that permissions are delegated to the user. user|group[,user|group] Specifies to whom the permissions are delegated. Multiple enti- ties can be specified as a comma-separated list. If neither of the -gu options are specified, then the argument is interpreted preferentially as the keyword everyone, then as a user name, and lastly as a group name. To specify a user or group named "everyone", use the -g or -u options. To specify a group with the same name as a user, use the -g options. perm|@setname[,perm|@setname] The permissions to delegate. Multiple permissions may be speci- fied 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 @, may be specified. See the -s form below for details. If neither of the -dl options are specified, or both are, then the permissions are allowed for the file system or volume, and all of its descendents. Permissions are generally the ability to use a ZFS subcommand or change a ZFS property. The following permissions are available: NAME TYPE NOTES --------------------------------------------------------------------------------------------------------------------------------------------------------------- allow subcommand Must also have the permission that is being allowed bookmark subcommand clone subcommand Must also have the create ability and mount ability in the origin file system create subcommand Must also have the mount ability. Must also have the refreservation ability to create a non-sparse volume. destroy subcommand Must also have the mount ability diff subcommand Allows lookup of paths within a dataset given an object number, and the ability to create snapshots necessary to zfs diff. hold subcommand Allows adding a user hold to a snapshot load-key subcommand Allows loading and unloading of encryption key (see zfs load-key and zfs unload-key). change-key subcommand Allows changing an encryption key via zfs change-key. mount subcommand Allows mounting/umounting ZFS datasets promote subcommand Must also have the mount and promote ability in the origin file system receive subcommand Must also have the mount and create ability release subcommand Allows releasing a user hold which might destroy the snapshot rename subcommand Must also have the mount and create ability in the new parent rollback subcommand Must also have the mount ability send subcommand share subcommand Allows sharing file systems over NFS or SMB protocols snapshot subcommand Must also have the mount ability groupquota other Allows accessing any groupquota@ property groupobjquota other Allows accessing any groupobjquota@ property groupused other Allows reading any groupused@ property groupobjused other Allows reading any groupobjused@ property userprop other Allows changing any user property userquota other Allows accessing any userquota@ property userobjquota other Allows accessing any userobjquota@ property userused other Allows reading any userused@ property userobjused other Allows reading any userobjused@ property projectobjquota other Allows accessing any projectobjquota@ property projectquota other Allows accessing any projectquota@ property projectobjused other Allows reading any projectobjused@ property projectused other Allows reading any projectused@ 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 zfs allow -c perm|@setname[,perm|@setname] filesystem|volume Sets "create time" permissions. These permissions are granted (locally) to the creator of any newly-created descendent file system. zfs allow -s @setname perm|@setname[,perm|@setname] filesystem|volume Defines or adds permissions to a permission set. The set can be used by other zfs allow commands for the specified file system and its de- scendents. Sets are evaluated dynamically, so changes to a set are immediately reflected. Permission sets follow the same naming re- strictions as ZFS file systems, but the name must begin with @, and can be no more than 64 characters long. zfs unallow [-dglru] user|group[,user|group] [perm|@setname[,perm|@setname]] filesystem|volume zfs unallow [-dlr] -e|everyone [perm|@setname[,perm|@setname]] filesystem|volume zfs unallow [-r] -c [perm|@setname[,perm|@setname]] filesystem|volume Removes permissions that were granted with the zfs allow command. No permissions are explicitly denied, so other permissions granted are still in effect. For example, if the permission is granted by an an- cestor. If no permissions are specified, then all permissions for the specified user, group, or everyone are removed. Specifying everyone (or using the -e option) only removes the permissions that were granted to everyone, not all permissions for every user and group. See the zfs allow command for a description of the -ldugec options. -r Recursively remove the permissions from this file system and all descendents. zfs unallow [-r] -s @setname [perm|@setname[,perm|@setname]] filesystem|volume Removes permissions from a permission set. If no permissions are specified, then all permissions are removed, thus removing the set entirely. EXAMPLES Example 1: Delegating ZFS Administration Permissions on a ZFS Dataset The following example shows how to set permissions so that user cindys can create, destroy, mount, and take snapshots on tank/cindys. The permissions on tank/cindys are also displayed. # zfs allow cindys create,destroy,mount,snapshot tank/cindys # zfs allow tank/cindys ---- Permissions on tank/cindys -------------------------------------- Local+Descendent permissions: user cindys create,destroy,mount,snapshot Because the tank/cindys mount point permission is set to 755 by de- fault, user cindys will be unable to mount file systems under tank/cindys. Add an ACE similar to the following syntax to provide mount point access: # chmod A+user:cindys:add_subdirectory:allow /tank/cindys Example 2: Delegating Create Time Permissions on a ZFS Dataset The following example shows how to grant anyone in the group staff to create file systems in tank/users. This syntax also allows staff mem- bers to destroy their own file systems, but not destroy anyone else's file system. The permissions on tank/users are also displayed. # zfs allow staff create,mount tank/users # zfs allow -c destroy tank/users # zfs allow tank/users ---- Permissions on tank/users --------------------------------------- Permission sets: destroy Local+Descendent permissions: group staff create,mount Example 3: Defining and Granting a Permission Set on a ZFS Dataset The following example shows how to define and grant a permission set on the tank/users file system. The permissions on tank/users are also displayed. # zfs allow -s @pset create,destroy,snapshot,mount tank/users # zfs allow staff @pset tank/users # zfs allow tank/users ---- Permissions on tank/users --------------------------------------- Permission sets: @pset create,destroy,mount,snapshot Local+Descendent permissions: group staff @pset Example 4: Delegating Property Permissions on a ZFS Dataset The following example shows to grant the ability to set quotas and reservations on the users/home file system. The permissions on users/home are also displayed. # zfs allow cindys quota,reservation users/home # zfs allow 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 Example 5: Removing ZFS Delegated Permissions on a ZFS Dataset The following example shows how to remove the snapshot permission from the staff group on the tank/users file system. The permissions on tank/users are also displayed. # zfs unallow staff snapshot tank/users # zfs allow tank/users ---- Permissions on tank/users --------------------------------------- Permission sets: @pset create,destroy,mount,snapshot Local+Descendent permissions: group staff @pset FreeBSD 14.3 March 16, 2022 ZFS-ALLOW(8)
NAME | SYNOPSIS | DESCRIPTION | EXAMPLES
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