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NFSv4 File ACL

An NFSv4 ACL consists of one or more NFSv4 ACEs (Access Control Entry), each delimited by a comma or whitespace.

An NFSv4 ACE is written as a colon-delimited, 4-field string in the following format:

<type>:<flags>:<principal>:<permissions>

ACE Elements

<type> - one of:

Flag Name
A allow
D deny
U audit
L alarm

<flags> - zero or more (depending on <type>) of:

Flag Name
f file-inherit
d directory-inherit
p no-propagate-inherit
i inherit-only
S successful-access
F failed-access
g group (denotes that is a group)

<principal> - named user or group, or one of: OWNER@, GROUP@, EVERYONE@

<permissions> - one or more of:

Flag Name
r read-data / list-directory
w write-data / create-file
a append-data / create-subdirectory
x execute
d delete
D delete-child (directories only)
t read-attrs
T write-attrs
n read-named-attrs
N write-named-attrs
c read-ACL
C write-ACL
o write-owner
y synchronize

Example

[root@login2.salomon proj1]# nfs4_getfacl open-20-11

# file: open-20-11
A::OWNER@:rwaDxtTcCy
A::GROUP@:rxtcy
A:g:open-20-11@it4i.cz:rwaDxtcy
A::EVERYONE@:tcy
A:fdi:OWNER@:rwaDxtTcCy
A:fdi:GROUP@:rxtcy
A:fdig:open-20-11@it4i.cz:rwaDxtcy
A:fdi:EVERYONE@:tcy

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