From fa7c7b6e590367a2b1dc2ba2d9f5f4500ff29ae3 Mon Sep 17 00:00:00 2001 From: Neil Brown Date: Mon, 15 Oct 2012 12:50:35 -0400 Subject: [PATCH] mount.nfs mapage: clear up confusion between 'proto' and 'transport' The mount option "proto=" actually set the "transport" which in netconfig usage is the pairing of a protocol (e.g. UDP, TCP) with a protocol family (e.g. INET, INET6). This can cause confusion if people naively except "proto=udp" to work equally well on IPv6. So add some text to both nfs(5) and nfsmount.conf(5) to hopefully clarify this. Acked-by: Chuck Lever Signed-off-by: NeilBrown Signed-off-by: Steve Dickson --- utils/mount/nfs.man | 65 ++++++++++++++--------------------- utils/mount/nfsmount.conf.man | 15 +++++--- 2 files changed, 36 insertions(+), 44 deletions(-) diff --git a/utils/mount/nfs.man b/utils/mount/nfs.man index da6d6d3..c15de98 100644 --- a/utils/mount/nfs.man +++ b/utils/mount/nfs.man @@ -1,5 +1,5 @@ .\"@(#)nfs.5" -.TH NFS 5 "2 November 2007" +.TH NFS 5 "9 October 2012" .SH NAME nfs \- fstab format and options for the .B nfs @@ -472,24 +472,15 @@ Use these options, along with the options in the above subsection, for NFS versions 2 and 3 only. .TP 1.5i .BI proto= netid -The transport protocol name and protocol family the NFS client uses -to transmit requests to the NFS server for this mount point. -If an NFS server has both an IPv4 and an IPv6 address, using a specific -netid will force the use of IPv4 or IPv6 networking to communicate -with that server. -.IP -If support for TI-RPC is built into the -.B mount.nfs -command, -.I netid -is a valid netid listed in -.IR /etc/netconfig . -The value "rdma" may also be specified. -If the -.B mount.nfs -command does not have TI-RPC support, then +The .I netid -is one of "tcp," "udp," or "rdma," and only IPv4 may be used. +determines the transport that is used to communicate with the NFS +server. Available options are +.BR udp ", " udp6 ", "tcp ", " tcp6 ", and " rdma . +Those which end in +.B 6 +use IPv6 addresses and are only available if support for TI-RPC is +built in. Others use IPv4 addresses. .IP Each transport protocol uses different default .B retrans @@ -569,19 +560,18 @@ This option can be used when mounting an NFS server through a firewall that blocks the rpcbind protocol. .TP 1.5i .BI mountproto= netid -The transport protocol name and protocol family the NFS client uses +The transport the NFS client uses to transmit requests to the NFS server's mountd service when performing this mount request, and when later unmounting this mount point. .IP -If support for TI-RPC is built into the +.I netid +may be one of +.BR udp ", and " tcp +which use IPv4 address or, if TI-RPC is built into the .B mount.nfs command, -.I netid -is a valid netid listed in -.IR /etc/netconfig . -Otherwise, -.I netid -is one of "tcp" or "udp," and only IPv4 may be used. +.BR udp6 ", and " tcp6 +which use IPv6 addresses. .IP This option can be used when mounting an NFS server through a firewall that blocks a particular transport. @@ -773,21 +763,14 @@ Use these options, along with the options in the first subsection above, for NFS version 4 and newer. .TP 1.5i .BI proto= netid -The transport protocol name and protocol family the NFS client uses -to transmit requests to the NFS server for this mount point. -If an NFS server has both an IPv4 and an IPv6 address, using a specific -netid will force the use of IPv4 or IPv6 networking to communicate -with that server. -.IP -If support for TI-RPC is built into the -.B mount.nfs -command, -.I netid -is a valid netid listed in -.IR /etc/netconfig . -Otherwise, +The .I netid -is one of "tcp" or "udp," and only IPv4 may be used. +determines the transport that is used to communicate with the NFS +server. Supported options are +.BR tcp ", " tcp6 ", and " rdma . +.B tcp6 +use IPv6 addresses and is only available if support for TI-RPC is +built in. Both others use IPv4 addresses. .IP All NFS version 4 servers are required to support TCP, so if this mount option is not specified, the NFS version 4 client @@ -851,6 +834,8 @@ The DATA AND METADATA COHERENCE section discusses the behavior of this option in more detail. .TP 1.5i .BI clientaddr= n.n.n.n +.TP 1.5i +.BI clientaddr= n:n: ... :n Specifies a single IPv4 address (in dotted-quad form), or a non-link-local IPv6 address, that the NFS client advertises to allow servers diff --git a/utils/mount/nfsmount.conf.man b/utils/mount/nfsmount.conf.man index 12a3fe7..3aa3456 100644 --- a/utils/mount/nfsmount.conf.man +++ b/utils/mount/nfsmount.conf.man @@ -1,5 +1,5 @@ .\"@(#)nfsmount.conf.5" -.TH NFSMOUNT.CONF 5 "9 Mar 2008" +.TH NFSMOUNT.CONF 5 "9 October 2012" .SH NAME nfsmount.conf - Configuration file for NFS mounts .SH SYNOPSIS @@ -18,6 +18,10 @@ to particular variables using the .BR = operator, as in .BR Proto=Tcp . +The variables that can be assigned are exactly the set of NFS specific +mount options listed in +.BR nfs (5). +.PP Sections are broken up into three basic categories: Global options, Server options and Mount Point options. .HP @@ -54,7 +58,7 @@ are defined in the configuration file. Proto=Tcp .RS .HP -The TCP protocol will be used on every NFS mount. +The TCP/IPv4 protocol will be used on every NFS mount. .HP .RE [ Server \(lqnfsserver.foo.com\(rq ] @@ -62,10 +66,13 @@ The TCP protocol will be used on every NFS mount. rsize=32k .br wsize=32k +.br + proto=udp6 .HP .RS -A 33k (32768 bytes) block size will be used as the read and write -size on all mounts to the 'nfsserver.foo.com' server. +A 32k (32768 bytes) block size will be used as the read and write +size on all mounts to the 'nfsserver.foo.com' server. UDP/IPv6 +is the protocol to be used. .HP .RE .BR -- 2.39.5