Re: ANNOUNCE: nfs-utils 1.0.4

Steven Cole (
14 Jul 2003 13:34:47 -0600

On Mon, 2003-07-14 at 11:00, Neil F. Brown wrote:
> This release of nfs-utils contains:
> 1/ Fix for a remotely exploitable buffer-overflow bug.
> 2/ assorted minor bug fixes
> 3/ Extensive changes to make use of new functionality in linux-2.6.0 nfsd
> nfs-utils 1.0.4 can be downloaded from
> or
> http://www.{countrycode}
> I consider this release to be a pre-release for 1.1.0 which I hope to
> release before linux-2.6.0-final. Bug reports are very welcome.

Although it may be a month or three until 2.6.0-final, here is an update
to Documentation/Changes and scripts/ver_linux for nfs-utils.

Your information should be preserved somewhere, and
Documentation/Changes should be one of first places people look when
moving from 2.4 to 2.6.

I moved the nfs-utils table entry up a couple of rows to group it with
other network related items.

If this patch looks OK, please send it upstream. Otherwise, please fix
and send.


diff -ur 2.5-bk-current/Documentation/Changes 2.5-linux/Documentation/Changes
--- 2.5-bk-current/Documentation/Changes Mon Jul 14 12:48:38 2003
+++ 2.5-linux/Documentation/Changes Mon Jul 14 13:03:05 2003
@@ -61,9 +61,9 @@
o quota-tools 3.09 # quota -V
o PPP 2.4.0 # pppd --version
o isdn4k-utils 3.1pre1 # isdnctrl 2>&1|grep version
+o nfs-utils 1.0.4 # showmount --version
o procps 2.0.9 # ps --version
o oprofile 0.5.3 # oprofiled --version
-o nfs-utils 1.0.3 # showmount --version

Kernel compilation
@@ -280,6 +280,33 @@
Due to changes in the length of the phone number field, isdn4k-utils
needs to be recompiled or (preferably) upgraded.

+In 2.4 and earlier kernels, the nfs server needed to know about any
+client that expected to be able to access files via NFS. This
+information would be given to the kernel by "mountd" when the client
+mounted the filesystem, or by "exportfs" at system startup. exportfs
+would take information about active clients from /var/lib/nfs/rmtab.
+This approach is quite fragile as it depends on rmtab being correct
+which is not always easy, particularly when trying to implement
+fail-over. Even when the system is working well, rmtab suffers from
+getting lots of old entries that never get removed.
+With 2.6 we have the option of having the kernel tell mountd when it
+gets a request from an unknown host, and mountd can give appropriate
+export information to the kernel. This removes the dependency on
+rmtab and means that the kernel only needs to know about currently
+active clients.
+To enable this new functionality, you need to:
+ mount -t nfsd nfsd /proc/fs/nfs
+before running exportfs or mountd. It is recommended that all NFS
+services be protected from the internet-at-large where that is possible.
Getting updated software

@@ -368,6 +395,10 @@
o <>

+o <>
o <>
Only in 2.5-linux/Documentation: x
diff -ur 2.5-bk-current/scripts/ver_linux 2.5-linux/scripts/ver_linux
--- 2.5-bk-current/scripts/ver_linux Mon Jul 14 12:48:09 2003
+++ 2.5-linux/scripts/ver_linux Mon Jul 14 12:51:19 2003
@@ -54,6 +54,9 @@
isdnctrl 2>&1 | grep version | awk \
'NR==1{print "isdn4k-utils ", $NF}'

+showmount --version 2>&1 | grep showmount | awk \
+'NR==1{print "nfs-utils ", $NF}'
ls -l `ldd /bin/sh | awk '/libc/{print $3}'` | sed \
-e 's/\.so$//' | awk -F'[.-]' '{print "Linux C Library " \

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