 |
|
|
|
|
|
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.
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.
|
| |||||||||||||||||||
Home - Table Of Contents - Contact Us
The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005
© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.