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