mfsexports.cfg(5)

NAME
mfsexports.cfg - MooseFS access control for mfsmounts

DESCRIPTION
The file mfsexports.cfg contains MooseFS access list for mfsmount clients.

SYNTAX

Syntax is:

ADDRESS DIRECTORY [OPTIONS]

Lines starting with # character are ignored as comments.

ADDRESS can be specified in several forms:

*	all addresses
n.n.n.n	single IP address
n.n.n.n/b	IP class specified by network address and number of significant bits
n.n.n.n/m.m.m.m	IP class specified by network address and mask
f.f.f.f-t.t.t.t	IP range specified by from-to addresses (inclusive)

DIRECTORY can be / or path relative to MooseFS root; special value . means MFSMETA companion filesystem.

OPTIONS list:

ro, readonly
    export tree in read-only mode; this is default

rw, readwrite
    export tree in read-write mode

alldirs
    allows to mount any subdirectory of specified directory (similarly to NFS)

dynamicip
    allows reconnecting of already authenticated client from any IP address (the default is to check IP address on reconnect)

ignoregid
    disable testing of group access at mfsmaster level (it's still done at mfsmount level) - in this case "group" and "other" permissions are logically added; needed for supplementary groups to work (mfsmaster receives only user primary group information)

admin
    administrative privileges - currently: allow changing of quota values and storage classes management

maproot=USER[:GROUP]
    maps root (uid=0) accesses to given user and group (similarly to maproot option in NFS mounts); USER and GROUP can be given either as name or number; if no group is specified, USER's primary group is used. Names are resolved on mfsmaster side (see note below).

mapall=USER[:GROUP]
    like above but maps all non privileged users (uid!=0) accesses to given user and group (see notes below).

password=PASS, md5pass=MD5
    requires password authentication in order to access specified resource

minversion=VER
    rejects access from clients older than specified

mingoal=N, maxgoal=N
    specify range in which goal can be set by users

mintrashtime=TDUR, maxtrashtime=TDUR
    specify range in which trashtime can be set by users

disable=OPERATION[:OPERATION[:...]]
    do not allow the client to perform certain operations

Default options are: ro, maproot=999:999, mingoal=1, maxgoal=9, mintrashtime=0, maxtrashtime=4294967295.

NOTES
USER and GROUP names (if not specified by explicit uid/gid number) are resolved on mfsmaster host.

TDUR can be specified as number without time unit (number of seconds) or combination of numbers with time units. Time units are: W,D,H,M,S. Order is important - less significant time units can't be defined before more significant time units. Time units are case insensitive.

Option mapall works in MooseFS in different way than in NFS, because MooseFS is using FUSE's "default_permissions" option. When mapall option is used, users see all objects with uid equal to mapped uid as their own and all other as root's objects. Similarly objects with gid equal to mapped gid are seen as objects with current user's primary group and all other objects as objects with group 0 (usually wheel). With mapall option set attribute cache in kernel is always turned off.

Option disable can take many parameters (operations to disable) in two ways: as a list separated by colons (:) or by repeating the option many times. List of operations that can be disabled:
chown        - don't allow the client to perform the chown operation
chmod        - don't allow the client to perform the chmod operation
symlink      - don't allow the client to create symbolic links
mkfifo       - don't allow the client to create FIFOs
mkdev        - don't allow the client to create devices
mksock       - don't allow the client to create sockets
mkdir        - don't allow the client to create directories
unlink       - don't allow the client to remove non directory objects (will also deny move/rename operation if target inode already exists!)
rmdir        - don't allow the client to remove directories (will also deny move/rename operation if target inode already exists!)
rename       - don't allow the client to change inodes (files, directories) names
move         - don't allow the client to move inodes (files, directories) to another path
link         - don't allow the client to create hard links
create       - don't allow the client to create new files
readdir      - don't allow the client to list directories ('ls' command will not work)
read         - don't allow the client to read from files
write        - don't allow the client to write to files
truncate     - don't allow the client to shorten the length of a file with truncate command
setlength    - don't allow the client to increase the length of a file with truncate command
appendchunks - don't allow the client to add chunks from one file to another (mfsappendchunks)
snapshot     - don't allow the client to create snapshots
settrash     - don't allow the client to change trash retention time
setsclass    - don't allow the client to set storage classes
seteattr     - don't allow the client to set mfs extra attributes
setxattr     - don't allow the client to set XATTRs
setfacl      - don't allow the client to set ACLs

EXAMPLES
*                    /       ro
192.168.1.0/24       /       rw
192.168.1.0/24       /       rw,alldirs,maproot=0,password=passcode
10.0.0.0-10.0.0.5    /test   rw,maproot=nobody,password=test
10.1.0.0/255.255.0.0 /public rw,mapall=1000:1000
10.2.0.0/16          /       rw,alldirs,maproot=0,mintrashtime=2h30m,maxtrashtime=2w
192.168.1.0/24       /       rw,disable=unlink:rmdir:truncate
192.168.1.0/24       /       rw,disable=unlink,disable=rmdir,disable=truncate

REPORTING BUGS
Report bugs to <bugs@moosefs.com>.

COPYRIGHT
Copyright (C) 2020 Jakub Kruszona-Zawadzki, Core Technology Sp. z o.o. This file is part of MooseFS. MooseFS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2 (only). MooseFS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with MooseFS; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02111-1301, USA or visit http://www.gnu.org/licenses/gpl-2.0.html

SEE ALSO
mfsmaster(8), mfsmaster.cfg(5)