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Table Of Contents  The TCP/IP Guide
 9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
      9  Network File and Resource Sharing Protocols and the TCP/IP Network File System (NFS)
           9  TCP/IP Network File System (NFS)

Previous Topic/Section
NFS Server Procedures and Operations
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12
3
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TCP/IP Network Configuration and Management Protocols (BOOTP, DHCP, SNMP and RMON)
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NFS File System Model and the Mount Protocol
(Page 3 of 3)

Mount Protocol Server Procedures

The actual implementation of the Mount protocol is very similar to that of NFS itself. Like NFS, the Mount protocol uses XDR to define data types to be exchanged between client and server, and RPC to define a set of server procedures that clients may use to perform different operations. The main difference between Mount and NFS is simply that Mount defines procedures related to opening and closing filesystems rather than file access operations. Table 185 shows the server procedures used in the Mount protocol.


Table 185: NFS Mount Protocol Server Procedures

Procedure #

Procedure Name

Procedure Summary

Description

0

null

Do Nothing

Dummy procedure provided for testing purposes.

1

mnt

Add Mount Entry

Performs a mount operation by mapping a path on a server to a file handle for the client to use.

2

dump

Return Mount Entries

Returns a list of remotely mounted file systems.

3

umnt

Remove Mount Entry

Performs an “unmount” by removing a mount entry. (It should be “dismount”. Techies are rarely into grammar. J)

4

umntall

Remove All Mount Entries

Removes all mount entries, thus eliminating all mounted file systems between server and client.

5

export

Return Export List

Returns a list of exported file systems and indicates which clients are allowed to mount them. This is used to let the client see what served file systems are available for use.


As mentioned in other topics in this section, NFS version 4 does away with the notion of a separate Mount protocol, incorporating file mounting operations into NFS directly.

 


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NFS Server Procedures and Operations
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TCP/IP Network Configuration and Management Protocols (BOOTP, DHCP, SNMP and RMON)
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