svn commit: r355758 - head/sbin/mount_nfs
Rick Macklem
rmacklem at FreeBSD.org
Sat Dec 14 21:49:48 UTC 2019
Author: rmacklem
Date: Sat Dec 14 21:49:47 2019
New Revision: 355758
URL: https://svnweb.freebsd.org/changeset/base/355758
Log:
Update the mount_nfs.8 man page to include NFSv4.2.
r355677 added NFSv4.2 support to the NFS client. This patch updates the
mount_nfs.8 man page to reflect that.
It also clarifies that the "nolockd" option does not apply to NFSv4 mounts.
This is a content change.
Modified:
head/sbin/mount_nfs/mount_nfs.8
Modified: head/sbin/mount_nfs/mount_nfs.8
==============================================================================
--- head/sbin/mount_nfs/mount_nfs.8 Sat Dec 14 19:44:42 2019 (r355757)
+++ head/sbin/mount_nfs/mount_nfs.8 Sat Dec 14 21:49:47 2019 (r355758)
@@ -28,7 +28,7 @@
.\" @(#)mount_nfs.8 8.3 (Berkeley) 3/29/95
.\" $FreeBSD$
.\"
-.Dd April 13, 2017
+.Dd December 14, 2019
.Dt MOUNT_NFS 8
.Os
.Sh NAME
@@ -59,9 +59,11 @@ on to the file system tree at the point
.Ar node .
This command is normally executed by
.Xr mount 8 .
-It implements the mount protocol as described in RFC 1094, Appendix A and
-.%T "NFS: Network File System Version 3 Protocol Specification" ,
-Appendix I.
+For NFSv2 and NFSv3,
+it implements the mount protocol as described in RFC 1094, Appendix A and
+RFC 1813, Appendix I.
+For NFSv4, it uses the NFSv4 protocol as described in RFC 7530, RFC 5661 and
+RFC 7862.
.Pp
By default,
.Nm
@@ -197,20 +199,20 @@ This option will force the mount to use
TCP transport.
.It Cm minorversion Ns = Ns Aq Ar value
Override the default of 0 for the minor version of the NFS Version 4 protocol.
-The only minor version currently supported is 1.
+The minor versions other than 0 currently supported are 1 and 2.
This option is only meaningful when used with the
.Cm nfsv4
option.
.It Cm oneopenown
-Make a minor version 1 of the NFS Version 4 protocol mount use a single OpenOwner
-for all Opens.
+Make a minor version 1 or 2 of the NFS Version 4 protocol mount use a single
+OpenOwner for all Opens.
This may be useful for a server with a very low limit on OpenOwners, such as
AmazonEFS.
-It can only be used with an NFSv4.1 mount.
+It ca only be used with an NFSv4.1 or NFSv4.2 mount.
It may not work correctly when Delegations are being issued by a server,
but note that the AmazonEFS server does not issued delegations at this time.
.It Cm pnfs
-Enable support for parallel NFS (pNFS) for minor version 1 of the
+Enable support for parallel NFS (pNFS) for minor version 1 or 2 of the
NFS Version 4 protocol.
This option is only meaningful when used with the
.Cm minorversion
@@ -250,9 +252,9 @@ Do
.Em not
forward
.Xr fcntl 2
-locks over the wire.
+locks over the wire via the NLM protocol for NFSv3 mounts.
All locks will be local and not seen by the server
-and likewise not seen by other NFS clients.
+and likewise not seen by other NFS clients for NFSv3 mounts.
This removes the need to run the
.Xr rpcbind 8
service and the
@@ -263,6 +265,9 @@ servers on the client.
Note that this option will only be honored when performing the
initial mount, it will be silently ignored if used while updating
the mount options.
+Also, note that NFSv4 mounts do not use these daemons and handle locks over the
+wire in the NFSv4 protocol.
+As such, this option is meaningless for NFSv4 mounts.
.It Cm noncontigwr
This mount option allows the NFS client to
combine non-contiguous byte ranges being written
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