svn commit: r355956 - head/usr.sbin/nfsd
Rick Macklem
rmacklem at FreeBSD.org
Fri Dec 20 21:31:08 UTC 2019
Author: rmacklem
Date: Fri Dec 20 21:31:08 2019
New Revision: 355956
URL: https://svnweb.freebsd.org/changeset/base/355956
Log:
Update the man page to reflect the addition of NFSv4.2 (r355677).
Include references to NFSv4.2 and associated RFCs and note new features
present in NFSv4.2.
This is a content change.
Modified:
head/usr.sbin/nfsd/nfsv4.4
Modified: head/usr.sbin/nfsd/nfsv4.4
==============================================================================
--- head/usr.sbin/nfsd/nfsv4.4 Fri Dec 20 21:30:51 2019 (r355955)
+++ head/usr.sbin/nfsd/nfsv4.4 Fri Dec 20 21:31:08 2019 (r355956)
@@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd July 19, 2017
+.Dd December 20, 2019
.Dt NFSV4 4
.Os
.Sh NAME
@@ -34,8 +34,11 @@
The NFS client and server provides support for the
.Tn NFSv4
specification; see
-.%T "Network File System (NFS) Version 4 Protocol RFC 7530" and
-.%T "Network File System (NFS) Version 4 Minor Version 1 Protocol RFC 5661" .
+.%T "Network File System (NFS) Version 4 Protocol RFC 7530" ,
+.%T "Network File System (NFS) Version 4 Minor Version 1 Protocol RFC 5661" ,
+.%T "Network File System (NFS) Version 4 Minor Version 2 Protocol RFC 7862" ,
+.%T "File System Extended Attributes in NFSv4 RFC 8276" and
+.%T "Parallel NFS (pNFS) Flexible File Layout RFC 8435" .
The protocol is somewhat similar to NFS Version 3, but differs in significant
ways.
It uses a single compound RPC that concatenates operations to-gether.
@@ -76,6 +79,12 @@ It provides several optional features not present in N
(not yet implemented)
- Delegations, which allow a client to operate on a file locally
- pNFS, where I/O operations are separated from Metadata operations
+And for NFSv4.2 only
+- User namespace extended attributes
+- lseek(SEEK_DATA/SEEK_HOLE)
+- File copying done locally on the server for copy_file_range(2)
+- posix_fallocate(2)
+- posix_fadvise(POSIX_FADV_WILLNEED/POSIX_FADV_DONTNEED)
.Ed
.Pp
The
@@ -306,7 +315,7 @@ N.N.N.N.N.N
where the first 4 Ns are the host IP address and the last two are the
port# in network byte order (all decimal #s in the range 0-255).
.Pp
-For NFSv4.1, the callback path (called a backchannel) uses the same TCP connection as the mount,
+For NFSv4.1 and NFSv4.2, the callback path (called a backchannel) uses the same TCP connection as the mount,
so none of the above applies and should work through gateways without
any issues.
.Pp
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