361 lines
11 KiB
Plaintext
361 lines
11 KiB
Plaintext
|
|
|
|
|
|
|
|
|
|
|
|
INTERNET-DRAFT Leif Johansson
|
|
Intented Category: Experimental Stockholm University
|
|
|
|
|
|
|
|
A directory (X.500 and LDAPv3) schema for Berkely automounter
|
|
|
|
|
|
1. Status of this Memo
|
|
|
|
This memo describes a directory (LDAP or X.500) schema for storing amd (Berkely-
|
|
style automounter) mount info maps. The schema is currently beeing supported by
|
|
the (beta version of the) am-utils version 6 package [AMUTILS].
|
|
|
|
2. Overview and Rationale
|
|
|
|
Directory services such as X.500 [X500] or LDAP [RFC2251] are a natural choice of
|
|
repository for amd mount map databases. All Object Identifiers in this document
|
|
are prefixed by amdSchema-id to be assigned later. The relation between this
|
|
schema and the automount schema elements in [HOWARD] are mostly superficial. The
|
|
model for the elements in [HOWARD] was the SUN automounter which has quite a
|
|
different syntax for mount maps. Furthermore the intended usage of this schema
|
|
differs from that of [HOWARD] in many respects.
|
|
|
|
3. DSA requirements
|
|
|
|
Directory servers implementing this schema SHOULD maintain the modifyTimestamp
|
|
operational attribute. If not the amdMapCacheTtl attribute SHOULD be set to 0
|
|
indicating to clients that caching of map entries SHOULD be turned off. Clients
|
|
wishing to use the amdMap schema MAY use the modifyTimestamp information to set
|
|
the ttl for internal caching schemes. A value of 0 for the amdMapCacheTtl must
|
|
result in clients turning off any local caching.
|
|
|
|
4. Syntax definitions
|
|
|
|
The following attribute syntax is defined in this document:
|
|
|
|
amdlocationlist
|
|
|
|
This syntax represents a amd map value. This is the syntax expressed in BNF using
|
|
definitions from [RFC2252]:
|
|
|
|
amdlocationlist = amdlocationselection |
|
|
amdlocationlist whsp "||" whsp amdlocationselection
|
|
|
|
amdlocationselection = amdlocation |
|
|
amdlocationselection whsp amdlocation
|
|
|
|
|
|
|
|
|
|
Johansson [Page 1]
|
|
|
|
|
|
|
|
|
|
|
|
Internet draft Berkeley AMD LDAP Schema 30 March 1998
|
|
|
|
|
|
amdlocation = amdlocationinfo |
|
|
"-" amdlocationinfo |
|
|
"-"
|
|
|
|
amdlocationinfo = seloropt |
|
|
amdlocationinfo ";" seloropt |
|
|
";"
|
|
|
|
seloropt = seletion |
|
|
optass
|
|
|
|
selection = keystring "==" printablestring
|
|
keystring "!=" printablestring
|
|
|
|
optass = keystring
|
|
|
|
X.500 servers or LDAPv3 servers (supporting the binary attribute option) may use
|
|
the following syntax definition:
|
|
|
|
AmdLocationList ::= SEQUENCE OF {
|
|
SEQUENCE OF {
|
|
location AmdLocation
|
|
}
|
|
}
|
|
|
|
AmdLocation ::= SET OF {
|
|
CHOICE {
|
|
location [0] AmdLocationInfo
|
|
notlocation [1] AmdLocationInfo
|
|
not [2] NULL
|
|
}
|
|
}
|
|
|
|
AmdLocationInfo ::= SET OF {
|
|
CHOICE {
|
|
selection [0] AmdSelection
|
|
option [1] AmdOption
|
|
}
|
|
}
|
|
|
|
AmdSelection ::= CHOICE {
|
|
eq [0] AttributeAndValue
|
|
ne [1] AttributeAndValue
|
|
}
|
|
|
|
AmdOption ::= AttributeAndValue
|
|
AttributeAndValue ::= SEQUENCE {
|
|
attribute IA5String
|
|
|
|
|
|
|
|
Johansson [Page 2]
|
|
|
|
|
|
|
|
|
|
|
|
Internet draft Berkeley AMD LDAP Schema 30 March 1998
|
|
|
|
|
|
value IA5String
|
|
}
|
|
|
|
5. Attribute types
|
|
|
|
The following attribute types are defined in this document:
|
|
|
|
amdMapName
|
|
amdMapCacheTtl
|
|
amdMapEntry
|
|
amdMapEntryKey
|
|
amdMapEntryValue
|
|
|
|
amdSchema-a OBJECT IDENTIFIER ::= { amdSchema-id 1 }
|
|
|
|
amdMapName ATTRIBUTE ::= {
|
|
WITH SYNTAX IA5String
|
|
EQUALITY MATCHING RULE caseIgoreExactMatch
|
|
--ID { amdSchema-a 1 }
|
|
DESCRIPTION
|
|
"This attribute is the symbolic and in the naming
|
|
context unique name of an amd map. This corresponds
|
|
in the case of a flat file database to the name of
|
|
the file or the mount-point of the map."
|
|
}
|
|
|
|
|
|
amdMapCacheTtl
|
|
ATTRIBUTE ::= {
|
|
WITH SYNTAX Integer
|
|
EQUALITY MATCHING RULE integerExactMatch
|
|
--ID { amdSchema-a 2 }
|
|
SINGLE VALUED
|
|
DESCRIPTION
|
|
"The maximum time-to-live for the entries in this
|
|
map. After this many milliseconds the map has to
|
|
be cleared from local caches and reloaded. A value
|
|
of 0 disables caching."
|
|
}
|
|
|
|
amdMapEntry
|
|
ATTRIBUTE ::= {
|
|
WITH SYNTAX DistinguishedName
|
|
EQUALITY MATHCING RULE dNCaseIgnoreExactMatch
|
|
--ID { amdSchema-a 3 }
|
|
DESCRIPTION
|
|
"A multivalued attribute listing the distinguished
|
|
names of the amdMapEntries making up this amdMap
|
|
|
|
|
|
|
|
Johansson [Page 3]
|
|
|
|
|
|
|
|
|
|
|
|
Internet draft Berkeley AMD LDAP Schema 30 March 1998
|
|
|
|
|
|
object."
|
|
}
|
|
|
|
amdMapEntryKey ::= {
|
|
ATTRIBUTE ::= {
|
|
WITH SYNTAX IA5String
|
|
EQUALITY MATCHING RULE stringExactMatch
|
|
--ID { amdSchema-a 4 }
|
|
SINGLE VALUED
|
|
DESCRIPTION
|
|
"The value of this attribute is usually the name of
|
|
a mountpoint for this amdMapEntry."
|
|
}
|
|
|
|
amdMapEntryValue ::= {
|
|
ATTRIBUTE ::= {
|
|
WITH SYNTAX AmdLocationList
|
|
--ID { amdSchema-a 5 }
|
|
DESCRIPTION
|
|
"This is the actual mount information for the amdMapEntry
|
|
using the syntax described above."
|
|
}
|
|
|
|
amdMapEntryKey ::= {
|
|
ATTRIBUTE ::= {
|
|
WITH SYNTAX IA5String
|
|
EQUALITY MATCHING RULE stringExactMatch
|
|
--ID { amdSchema-a 4 }
|
|
SINGLE VALUED
|
|
DESCRIPTION
|
|
"The value of this attribute is usually the name of
|
|
a mountpoint for this amdMapEntry."
|
|
}
|
|
|
|
amdMapEntryValue ::= {
|
|
ATTRIBUTE ::= {
|
|
WITH SYNTAX AmdLocationList
|
|
--ID { amdSchema-a 5 }
|
|
DESCRIPTION
|
|
"This is the actual mount information for the amdMapEntry
|
|
using the syntax described above."
|
|
}
|
|
|
|
6. Object classes
|
|
|
|
The following object classes are defined in this document:
|
|
|
|
amdMap
|
|
|
|
|
|
|
|
Johansson [Page 4]
|
|
|
|
|
|
|
|
|
|
|
|
Internet draft Berkeley AMD LDAP Schema 30 March 1998
|
|
|
|
|
|
amdMapEntry
|
|
|
|
defined as follows:
|
|
|
|
amdSchema-oc ::= { amdSchema-id 2 }
|
|
|
|
amdMap OBJECT-CLASS ::= {
|
|
SUBCLASS OF { top }
|
|
KIND auxiliary
|
|
--ID { amdSchema-oc 1 }
|
|
MAY CONTAIN { amdMapCacheTtl , cn }
|
|
MUST CONTAIN { amdMapName , amdMapEntry }
|
|
}
|
|
|
|
amdMapEntry OBJECT-CLASS ::= {
|
|
SUBCLASS OF { top }
|
|
KIND structural
|
|
--ID { amdSchema-oc 2 }
|
|
MUST CONTAIN {
|
|
amdMapName ,
|
|
amdEntryKey ,
|
|
amdEntryValue ,
|
|
} MAY CONTAIN
|
|
{ cn } DESCRIPTION "An entry of this
|
|
object class describes mount information relative to a
|
|
certain amdMap entry"
|
|
}
|
|
|
|
7. Examples
|
|
|
|
|
|
|
|
8. Security Considerations
|
|
|
|
Due to the security problems posed by NFS care should be taken not to advertise
|
|
exported filesystems. Therefore it is often desirable to limit access to entries
|
|
carrying amd mount map information to those systems to which the corresponding
|
|
filesystems have been exported.
|
|
|
|
9. References
|
|
|
|
[AMUTILS]
|
|
am-utils homepage: http://shekel.cs.columbia.edu/~erez/am-utils.html
|
|
|
|
[RFC2251]
|
|
M. Wahl, T. Howes, S. Kille, "Lightweight Directory Access
|
|
Protocol (v3)", RFC 2251, December 1997.
|
|
|
|
|
|
|
|
|
|
Johansson [Page 5]
|
|
|
|
|
|
|
|
|
|
|
|
Internet draft Berkeley AMD LDAP Schema 30 March 1998
|
|
|
|
|
|
[RFC2252]
|
|
M. Wahl, A. Coulbeck, T. Howes, S. Kille, "Lightweight Directory
|
|
Access Protocol (v3): Attribute Syntax Definitions", RFC 2252,
|
|
December 1997.
|
|
|
|
[RFC2253]
|
|
M. Wahl, S. Kille, T. Howes, "Lightweight Directory Access
|
|
Protocol (v3): UTF-8 String Representation of Distinguished
|
|
Names", RFC 2253, December 1997.
|
|
|
|
[HOWARD]
|
|
Luke Howard, "An Approach for Using LDAP as a Network
|
|
Information Service", draft-howard-nis-schema-??.txt, Internet
|
|
draft.
|
|
|
|
[X500]
|
|
ITU something or other.
|
|
|
|
|
|
|
|
Author's Address
|
|
|
|
|
|
Leif Johansson
|
|
Department of Mathematics
|
|
Stockholm University
|
|
S-106 91 Stockholm
|
|
SWEDEN
|
|
|
|
Email: leifj@matematik.su.se
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Johansson [Page 6]
|
|
|
|
|