freebsd-dev/sbin/nfsiod/nfsiod.8
Maxime Henrion 5965373e69 - Introduce a new struct xvfsconf, the userland version of struct vfsconf.
- Make getvfsbyname() take a struct xvfsconf *.
- Convert several consumers of getvfsbyname() to use struct xvfsconf.
- Correct the getvfsbyname.3 manpage.
- Create a new vfs.conflist sysctl to dump all the struct xvfsconf in the
  kernel, and rewrite getvfsbyname() to use this instead of the weird
  existing API.
- Convert some {set,get,end}vfsent() consumers to use the new vfs.conflist
  sysctl.
- Convert a vfsload() call in nfsiod.c to kldload() and remove the useless
  vfsisloadable() and endvfsent() calls.
- Add a warning printf() in vfs_sysctl() to tell people they are using
  an old userland.

After these changes, it's possible to modify struct vfsconf without
breaking the binary compatibility.  Please note that these changes don't
break this compatibility either.

When bp will have updated mount_smbfs(8) with the patch I sent him, there
will be no more consumers of the {set,get,end}vfsent(), vfsisloadable()
and vfsload() API, and I will promptly delete it.
2002-08-10 20:19:04 +00:00

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.\" From: @(#)nfsiod.8 8.2 (Berkeley) 2/22/94
.\" $FreeBSD$
.\"
.Dd September 22, 1994
.Dt NFSIOD 8
.Os
.Sh NAME
.Nm nfsiod
.Nd local
.Tn NFS
asynchronous I/O server
.Sh SYNOPSIS
.Nm
.Op Fl n Ar num_servers
.Sh DESCRIPTION
The
.Nm
utility is a kernel process which run on an
.Tn NFS
client machine to service asynchronous I/O requests to its server.
It improves performance but is not required for correct operation.
.Pp
This program controls the maximum number of processes that the kernel runs.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl n
Specify how many servers are permitted to be started.
.El
.Pp
A client should run enough daemons to handle its maximum
level of concurrency, typically four to six.
.Pp
If
.Nm
detects that the running kernel does not include
.Tn NFS
support, it will attempt to load a loadable kernel module containing
.Tn NFS
code, using
.Xr kldload 2 .
If this fails, or no
.Tn NFS
KLD was available,
.Nm
exits with an error.
.Sh DIAGNOSTICS
.Ex -std
.Sh SEE ALSO
.Xr nfsstat 1 ,
.Xr kldload 2 ,
.Xr nfssvc 2 ,
.Xr mountd 8 ,
.Xr nfsd 8 ,
.Xr rpcbind 8
.Sh HISTORY
The
.Nm
utility first appeared in
.Bx 4.4 .