autofs mount discarding directory in mount point

autofs mount discarding directory in mount point

[Ulrich Windl]

Hi,

I have a problem where autofs (Novell SLES10, autofs-4.1.4-23.4) discards the 
first and only directory for an NFS mount; for two directories the thing seems to 
work OK. I've browsed the sources, but couldn't easily find the problem.

The problem is that "server:/foo" which should be mounted to "/net/server/foo" is 
actually mounted to "/net/server" (with "foo's content" in "server")

Here's my trace:

automount[24703]: lookup(program): server -> -fstype=nfs,hard,intr,nodev,nosuid     
/foo server:/foo
automount[24703]: parse(sun): core of entry: 
options=fstype=nfs,hard,intr,nodev,nosuid, loc=/foo server:/foo
automount[24703]: parse(sun): mounting root /net, mountpoint server, what /foo 
server:/foo, fstype nfs, options hard,intr,nodev,nosuid
Nov  9 16:56:47 rksapas03 automount[24703]: mount(nfs): root=/net name=server
what=/foo server:/foo, fstype=nfs, options=hard,intr,nodev,nosuid
automount[24703]: mount(nfs): nfs options="hard,intr,nodev,nosuid", nosymlink=0, 
ro=0
automount[24703]: mount(nfs): host /foo: lookup failure
automount[24703]: mount(nfs): winner = server local = 0
automount[24703]: mount(nfs): from /foo server:/foo elected server:/foo
automount[24703]: mount(nfs): calling mkdir_path /net/server
automount[24703]: mount(nfs): calling mount -t nfs -s -o hard,intr,nodev,nosuid 
server:/foo /net/server
automount[24703]: mount(nfs): mounted server:/foo on /net/server


(Actual names replaced for clarity)

Regards,
Ulrich
P.S. I'm not subscribed to this list.

Re: autofs mount discarding directory in mount point

[Ian Kent]

On Tue, 2006-11-14 at 08:24 +0100, Ulrich Windl wrote:
> Hi,
> 
> I have a problem where autofs (Novell SLES10, autofs-4.1.4-23.4) discards the 
> first and only directory for an NFS mount; for two directories the thing seems to 
> work OK. I've browsed the sources, but couldn't easily find the problem.

I'm sure this problem has been resolved long ago but I can't remember.
It may be the check for whether an entry is a multi-mount or not that is
at fault but I have no idea what patches are included in SLES10.

This pre-analysis is really something that the downstream package
maintainer needs to do so that I can hopefully make some sense of what
may or may not be included in the package already.

You might check to see if
http://www.kernel.org/pub/linux/daemons/autofs/v4/autofs-4.1.4-multi-parse-fix.patch
has been applied.

> 
> The problem is that "server:/foo" which should be mounted to "/net/server/foo" is 
> actually mounted to "/net/server" (with "foo's content" in "server")
> 
> Here's my trace:
> 
> automount[24703]: lookup(program): server -> -fstype=nfs,hard,intr,nodev,nosuid     
> /foo server:/foo
> automount[24703]: parse(sun): core of entry: 
> options=fstype=nfs,hard,intr,nodev,nosuid, loc=/foo server:/foo
> automount[24703]: parse(sun): mounting root /net, mountpoint server, what /foo 
> server:/foo, fstype nfs, options hard,intr,nodev,nosuid
> Nov  9 16:56:47 rksapas03 automount[24703]: mount(nfs): root=/net name=server
> what=/foo server:/foo, fstype=nfs, options=hard,intr,nodev,nosuid
> automount[24703]: mount(nfs): nfs options="hard,intr,nodev,nosuid", nosymlink=0, 
> ro=0
> automount[24703]: mount(nfs): host /foo: lookup failure
> automount[24703]: mount(nfs): winner = server local = 0
> automount[24703]: mount(nfs): from /foo server:/foo elected server:/foo
> automount[24703]: mount(nfs): calling mkdir_path /net/server
> automount[24703]: mount(nfs): calling mount -t nfs -s -o hard,intr,nodev,nosuid 
> server:/foo /net/server
> automount[24703]: mount(nfs): mounted server:/foo on /net/server
> 
> 
> (Actual names replaced for clarity)
> 
> Regards,
> Ulrich
> P.S. I'm not subscribed to this list.
> 
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