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Update nfsd.8 for support of IPv6 addresses for hosts in the "-p" option.

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r336795 adds support for handling of IPv6 addresses returned by getaddrinfo(3)
for DS hostnames. This updates the man page for this change.

This is a content change.
This commit is contained in:
Rick Macklem 2018-07-27 23:38:31 +00:00
parent 6db50e1df0
commit 076e3c1072
1 changed files with 14 additions and 7 deletions
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21
usr.sbin/nfsd/nfsd.8
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@ -28,7 +28,7 @@
.\" @(#)nfsd.8 8.4 (Berkeley) 3/29/95
.\" $FreeBSD$
.\"
.Dd June 30, 2018
.Dd July 27, 2018
.Dt NFSD 8
.Os
.Sh NAME
@ -117,15 +117,10 @@ The
.Ar pnfs_setup
string is a set of fields separated by ',' characters:
.Bl -tag -width Ds
Each of these fields specifies one Data Server.
Each of these fields specifies one DS.
It consists of a server hostname, followed by a ':'
and the directory path where the DS's data storage file system is mounted on
this MDS server.
At this time, only IPv4 addresses are supported by the interface to the kernel,
so the
.Dq server hostname
must resolve to an IPv4 address and support mounts on that address.
This needs to be extended to support IPv6 addresses in the near future.
This can optionally be followed by a '#' and the mds_path, which is the
directory path for an exported file system on this MDS.
If this is specified, it means that this DS is to be used to store data
@ -161,6 +156,18 @@ data files for
and nfsv4-data1 will be used to store data files for
.Dq /export2 .
.El
.sp
When using IPv6 addresses for DSs
be wary of using link local addresses.
The IPv6 address for the DS is sent to the client and there is no scope
zone in it.
As such, a link local address may not work for a pNFS client to DS
TCP connection.
When parsed,
.Nm
will only use a link local address if it is the only address returned by
.Xr getaddrinfo 3
for the DS hostname.
.It Fl m Ar mirror_level
This option is only meaningful when used with the
.Fl p