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diff -up nfs-utils-1.3.0/utils/exportfs/exports.man.orig nfs-utils-1.3.0/utils/exportfs/exports.man
--- nfs-utils-1.3.0/utils/exportfs/exports.man.orig 2017-11-03 07:45:47.000000000 -0400
+++ nfs-utils-1.3.0/utils/exportfs/exports.man 2017-11-03 09:25:47.000000000 -0400
@@ -410,7 +410,7 @@ of the filesystem must be handled elsewh
.TP
.IR pnfs
-This option allows enables the use of pNFS extension if protocol level
+This option enables the use of the pNFS extension if the protocol level
is NFSv4.1 or higher, and the filesystem supports pNFS exports. With
pNFS clients can bypass the server and perform I/O directly to storage
devices. The default can be explicitly requested with the
diff -up nfs-utils-1.3.0/utils/mount/nfs.man.orig nfs-utils-1.3.0/utils/mount/nfs.man
--- nfs-utils-1.3.0/utils/mount/nfs.man.orig 2017-11-03 07:45:47.000000000 -0400
+++ nfs-utils-1.3.0/utils/mount/nfs.man 2017-11-03 09:23:20.000000000 -0400
@@ -11,11 +11,8 @@ NFS is an Internet Standard protocol
created by Sun Microsystems in 1984. NFS was developed
to allow file sharing between systems residing
on a local area network.
-The Linux NFS client supports three versions
-of the NFS protocol:
-NFS version 2 [RFC1094],
-NFS version 3 [RFC1813],
-and NFS version 4 [RFC3530].
+Depending on kernel configuration, the Linux NFS client may
+support NFS versions 2, 3, 4.0, 4.1, or 4.2.
.P
The
.BR mount (8)
@@ -88,9 +85,8 @@ These options are valid to use with any
The NFS protocol version number used to contact the server's NFS service.
If the server does not support the requested version, the mount request
fails.
-If this option is not specified, the client negotiates a suitable version
-with
-the server, trying version 4 first, version 3 second, and version 2 last.
+If this option is not specified, the client tries version 4.1 first,
+then negotiates down until it finds a version supported by the server.
.TP 1.5i
.BI vers= n
This option is an alternative to the
@@ -752,7 +748,7 @@ NOTE: When used together, the 'local_loc
by 'nolock'/'lock' mount option.
.SS "Options for NFS version 4 only"
Use these options, along with the options in the first subsection above,
-for NFS version 4 and newer.
+for NFS version 4.0 and newer.
.TP 1.5i
.BI proto= netid
The
@@ -825,7 +821,7 @@ the behavior of this option in more deta
Specifies a single IPv4 address (in dotted-quad form),
or a non-link-local IPv6 address,
that the NFS client advertises to allow servers
-to perform NFS version 4 callback requests against
+to perform NFS version 4.0 callback requests against
files on this mount point. If the server is unable to
establish callback connections to clients, performance
may degrade, or accesses to files may temporarily hang.
@@ -838,6 +834,11 @@ In the presence of multiple client netwo
special routing policies,
or atypical network topologies,
the exact address to use for callbacks may be nontrivial to determine.
+.IP
+NFS protocol versions 4.1 and 4.2 use the client-established
+TCP connection for callback requests, so do not require the server to
+connect to the client. This option is therefore only affect NFS version
+4.0 mounts.
.TP 1.5i
.BR migration " / " nomigration
Selects whether the client uses an identification string that is compatible
@@ -1726,7 +1727,7 @@ file system table
.TP 1.5i
.I /etc/nfsmount.conf
Configuration file for NFS mounts
-.SH BUGS
+.SH NOTES
Before 2.4.7, the Linux NFS client did not support NFS over TCP.
.P
Before 2.4.20, the Linux NFS client used a heuristic
@@ -1745,9 +1746,9 @@ when the
.BR rsize " and " wsize
settings were smaller than the system's page size.
.P
-The Linux NFS client does not yet support
-certain optional features of the NFS version 4 protocol,
-such as security negotiation, server referrals, and named attributes.
+The Linux client's support for protocol versions depend on whether the
+kernel was built with options CONFIG_NFS_V2, CONFIG_NFS_V3,
+CONFIG_NFS_V4, CONFIG_NFS_V4_1, and CONFIG_NFS_V4_2.
.SH "SEE ALSO"
.BR fstab (5),
.BR mount (8),
@@ -1780,4 +1781,8 @@ RFC 1833 for the RPC bind specification.
.br
RFC 2203 for the RPCSEC GSS API protocol specification.
.br
-RFC 3530 for the NFS version 4 specification.
+RFC 7530 for the NFS version 4.0 specification.
+.br
+RFC 5661 for the NFS version 4.1 specification.
+.br
+RFC 7862 for the NFS version 4.2 specification.