NFSD: Update help text for CONFIG_NFSD

Clean up: refresh the help text for Kconfig items related to the NFS
server.  Remove obsolete URLs, and make the language consistent among
the options.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/fs/Kconfig b/fs/Kconfig
index 1200277..a1dccb6 100644 (file)
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -1702,56 +1702,74 @@ config NFSD
        select PROC_FS if NFSD_V4
        select PROC_FS if SUNRPC_GSS
        help
-         If you want your Linux box to act as an NFS *server*, so that other
-         computers on your local network which support NFS can access certain
-         directories on your box transparently, you have two options: you can
-         use the self-contained user space program nfsd, in which case you
-         should say N here, or you can say Y and use the kernel based NFS
-         server. The advantage of the kernel based solution is that it is
-         faster.
+         Choose Y here if you want to allow other computers to access
+         files residing on this system using Sun's Network File System
+         protocol.  To compile the NFS server support as a module,
+         choose M here: the module will be called nfsd.
 
-         In either case, you will need support software; the respective
-         locations are given in the file <file:Documentation/Changes> in the
-         NFS section.
+         You may choose to use a user-space NFS server instead, in which
+         case you can choose N here.
 
-         If you say Y here, you will get support for version 2 of the NFS
-         protocol (NFSv2). If you also want NFSv3, say Y to the next question
-         as well.
+         To export local file systems using NFS, you also need to install
+         user space programs which can be found in the Linux nfs-utils
+         package, available from http://linux-nfs.org/.  More detail about
+         the Linux NFS server implementation is available via the
+         exports(5) man page.
 
-         Please read the NFS-HOWTO, available from
-         <http://www.tldp.org/docs.html#howto>.
+         Below you can choose which versions of the NFS protocol are
+         available to clients mounting the NFS server on this system.
+         Support for NFS version 2 (RFC 1094) is always available when
+         CONFIG_NFSD is selected.
 
-         To compile the NFS server support as a module, choose M here: the
-         module will be called nfsd.  If unsure, say N.
+         If unsure, say N.
 
 config NFSD_V2_ACL
        bool
        depends on NFSD
 
 config NFSD_V3
-       bool "Provide NFSv3 server support"
+       bool "NFS server support for NFS version 3"
        depends on NFSD
        help
-         If you would like to include the NFSv3 server as well as the NFSv2
-         server, say Y here.  If unsure, say Y.
+         This option enables support in your system's NFS server for
+         version 3 of the NFS protocol (RFC 1813).
+
+         If unsure, say Y.
 
 config NFSD_V3_ACL
-       bool "Provide server support for the NFSv3 ACL protocol extension"
+       bool "NFS server support for the NFSv3 ACL protocol extension"
        depends on NFSD_V3
        help
-         Implement the NFSv3 ACL protocol extension for manipulating POSIX
-         Access Control Lists on exported file systems. NFS clients should
-         be compiled with the NFSv3 ACL protocol extension; see the
-         CONFIG_NFS_V3_ACL option.  If unsure, say N.
+         Solaris NFS servers support an auxiliary NFSv3 ACL protocol that
+         never became an official part of the NFS version 3 protocol.
+         This protocol extension allows applications on NFS clients to
+         manipulate POSIX Access Control Lists on files residing on NFS
+         servers.  NFS servers enforce POSIX ACLs on local files whether
+         this protocol is available or not.
+
+         This option enables support in your system's NFS server for the
+         NFSv3 ACL protocol extension allowing NFS clients to manipulate
+         POSIX ACLs on files exported by your system's NFS server.  NFS
+         clients which support the Solaris NFSv3 ACL protocol can then
+         access and modify ACLs on your NFS server.
+
+         To store ACLs on your NFS server, you also need to enable ACL-
+         related CONFIG options for your local file systems of choice.
+
+         If unsure, say N.
 
 config NFSD_V4
-       bool "Provide NFSv4 server support (EXPERIMENTAL)"
+       bool "NFS server support for NFS version 4 (EXPERIMENTAL)"
        depends on NFSD && NFSD_V3 && EXPERIMENTAL
        select RPCSEC_GSS_KRB5
        help
-         If you would like to include the NFSv4 server as well as the NFSv2
-         and NFSv3 servers, say Y here.  This feature is experimental, and
-         should only be used if you are interested in helping to test NFSv4.
+         This option enables support in your system's NFS server for
+         version 4 of the NFS protocol (RFC 3530).
+
+         To export files using NFSv4, you need to install additional user
+         space programs which can be found in the Linux nfs-utils package,
+         available from http://linux-nfs.org/.
+
          If unsure, say N.
 
 config ROOT_NFS