Filesystem in Userspace

2007/10/18, bargav yaarov <byaarov@...>:
> ----- Original Message ----
> > From: css <css@...>
> > To: bargav yaarov <byaarov@...>
> > Cc: fuse-devel@...
> > Sent: Thursday, October 18, 2007 5:29:30 AM
> > Subject: Re: [fuse-devel] NFS and Fuse
> >
> > 2007/10/18, bargav yaarov :
> > > I would like to expose my fuse mount point to external servers over NFS.
> > >
> > > It does not work.
> > >
> > > I can however expose the same fuse mount point as a SAMBA share. That works
> > fine.
> > >
> > > Does anyone know why this is the case?
> > >
> > Do you run some NFS-Kernelspace-Server? Because as far as I know the
> > NFS-Kernel-Servers do not yet support fuse so far, and therefore, you
> > must use the NFS-Userspace-Server which is slower but will accept
> > Fuse.
> >
>
>
> Yes, I use a kernel space NFS server.  Is it impossible to use the kernel space Linux NFS stack with fuse?  Any modifications I can do?
>
> __________________________________________________
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>
As far as I know, it is still impossible. But I am not a
Kernel-Developer, I dont know. I think they are working on it. Why
dont you just run a Usermode-NFS for your FUSE-Directories?

----- Original Message ----=0A> From: css <css@...> To: barg=
av yaarov <byaarov@...> Cc: fuse-devel@...> =
Sent: Thursday, October 18, 2007 1:07:47 PM=0A> Subject: Re: [fuse-devel] N=
FS and Fuse=0A> =0A> 2007/10/18, bargav yaarov :=0A> > ----- Original Messa=
ge ----=0A> > > From: css =0A> > > To: bargav yaarov =0A> > > Cc: fuse-deve=
l@...> > > Sent: Thursday, October 18, 2007 5:29:30 AM=
=0A> > > Subject: Re: [fuse-devel] NFS and Fuse=0A> > >=0A> > > 2007/10/18,=
 bargav yaarov :=0A> > > > I would like to expose my fuse mount point to ex=
ternal servers over NFS.=0A> > > >=0A> > > > It does not work.=0A> > > >=0A=
> > > > I can however expose the same fuse mount point as a SAMBA share. Th=
at=0A> works=0A> > > fine.=0A> > > >=0A> > > > Does anyone know why this is=
 the case?=0A> > > >=0A> > > Do you run some NFS-Kernelspace-Server? Becaus=
e as far as I know the=0A> > > NFS-Kernel-Servers do not yet support fuse s=
o far, and therefore, you=0A> > > must use the NFS-Userspace-Server which i=
s slower but will accept=0A> > > Fuse.=0A> > >=0A> >=0A> >=0A> > Yes, I use=
 a kernel space NFS server. Is it impossible to use the kernel=0A> space Li=
nux NFS stack with fuse? Any modifications I can do?=0A> >=0A> > __________=
________________________________________=0A> > Do You Yahoo!?=0A> > Tired o=
f spam? Yahoo! Mail has the best spam protection around=0A> > http://mail.y=
ahoo.com=0A> >=0A> As far as I know, it is still impossible. But I am not a=
=0A> Kernel-Developer, I dont know. I think they are working on it. Why=0A>=
 dont you just run a Usermode-NFS for your=0A> FUSE-Directories?=0A>=0A=0AB=
ecause the client machines I run my fuse module on already has a kernel NFS=
 stack and the customer doesent want to use a user mode daemon in addition =
to that on the same machine.=0A=0ADo anyone know why this problem occurs?  =
Doesent NFS just access the local fuse mount point as a regular directory? =
 It works if that mount point were say a SAMBA mount point.  Why is it juse=
 fuse?  It infact works even if that mount point were some other kernel spa=
ce file system like a polyserve filesystem etc...=0A=0A____________________=
______________________________=0ADo You Yahoo!?=0ATired of spam?  Yahoo! Ma=
il has the best spam protection around =0Ahttp://mail.yahoo.com

You can export FUSE using NFS, we do it all the time. Just make sure you
set fsid in the exports file:

/3d *(rw,sync,fsid=1)

Note that it doesn't work perfectly, we still get the occasional hangup
when the system is under heavy load but it works well enough.

On Thu, 2007-10-18 at 15:37 -0700, bargav yaarov wrote:
> ----- Original Message ----
> > From: css <css@...>
> > To: bargav yaarov <byaarov@...>
> > Cc: fuse-devel@...
> > Sent: Thursday, October 18, 2007 1:07:47 PM
> > Subject: Re: [fuse-devel] NFS and Fuse
> > 
> > 2007/10/18, bargav yaarov :
> > > ----- Original Message ----
> > > > From: css 
> > > > To: bargav yaarov 
> > > > Cc: fuse-devel@...
> > > > Sent: Thursday, October 18, 2007 5:29:30 AM
> > > > Subject: Re: [fuse-devel] NFS and Fuse
> > > >
> > > > 2007/10/18, bargav yaarov :
> > > > > I would like to expose my fuse mount point to external servers over NFS.
> > > > >
> > > > > It does not work.
> > > > >
> > > > > I can however expose the same fuse mount point as a SAMBA share. That
> > works
> > > > fine.
> > > > >
> > > > > Does anyone know why this is the case?
> > > > >
> > > > Do you run some NFS-Kernelspace-Server? Because as far as I know the
> > > > NFS-Kernel-Servers do not yet support fuse so far, and therefore, you
> > > > must use the NFS-Userspace-Server which is slower but will accept
> > > > Fuse.
> > > >
> > >
> > >
> > > Yes, I use a kernel space NFS server. Is it impossible to use the kernel
> > space Linux NFS stack with fuse? Any modifications I can do?
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Tired of spam? Yahoo! Mail has the best spam protection around
> > > http://mail.yahoo.com
> > >
> > As far as I know, it is still impossible. But I am not a
> > Kernel-Developer, I dont know. I think they are working on it. Why
> > dont you just run a Usermode-NFS for your
> > FUSE-Directories?
> >
> 
> Because the client machines I run my fuse module on already has a kernel NFS stack and the customer doesent want to use a user mode daemon in addition to that on the same machine.
> 
> Do anyone know why this problem occurs?  Doesent NFS just access the local fuse mount point as a regular directory?  It works if that mount point were say a SAMBA mount point.  Why is it juse fuse?  It infact works even if that mount point were some other kernel space file system like a polyserve filesystem etc...
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
> 
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> fuse-devel@...
> https://lists.sourceforge.net/lists/listinfo/fuse-devel

> You can export FUSE using NFS, we do it all the time. Just make sure you=
=0A> set fsid in the exports file:=0A> =0A> /3d *(rw,sync,fsid=3D1)=0A> =0A=
> Note that it doesn't work perfectly, we still get the occasional hangup=
=0A> when the system is under heavy load but it works well enough.=0A=0A=0A=
I cannot get this to work.=0A=0AI tried the following exports=0A =0Afuse-ex=
port *(rw,sync,no_root_squash,fsid=3D10,anonuid=3D0)=0Afuse-export *(rw,syn=
c,no_root_squash,fsid=3D1,anonuid=3D0)=0Afuse-export *(rw,sync,no_root_squa=
sh,fsid=3D1)=0A =0A =0AI tried to mount it with the following options in fu=
se=0A-o allow_other=0A-o allow_root=0A =0AI also tried to mount fuse before=
 and after nfs was exporting the file system.=0A-> Start NFS=0A-> Start Fus=
e=0A-> mount via client =96 get permission denied=0A =0A-> start nfs=0A-> c=
onnect client=0A-> start fuse=0A-> try to access from client -> it would re=
ad and write to the original mount location and not through fuse=0A =0A-> S=
tart Fuse=0A-> Restart NFS =0A-> MountD fails=0A =0A  I also made sure I wa=
s connecting as root from the client and I performed chmod 777 on the dir. =
=0A =0AI am sure I am missing the one thing that will make this work .. any=
 other ideas???=0A=0A=0A=0A> > > > > > I would like to expose my fuse mount=
 point to external servers over=0A> NFS.=0A> > > > > >=0A> > > > > > It doe=
s not work.=0A> > > > > >=0A> > > > > > I can however expose the same fuse =
mount point as a SAMBA share. That=0A> > > works=0A> > > > > fine.=0A> > > =
> > >=0A> > > > > > Does anyone know why this is the case?=0A> > > > > >=0A=
> > > > > Do you run some NFS-Kernelspace-Server? Because as far as I know =
the=0A> > > > > NFS-Kernel-Servers do not yet support fuse so far, and ther=
efore, you=0A> > > > > must use the NFS-Userspace-Server which is slower bu=
t will accept=0A> > > > > Fuse.=0A> > > > >=0A> > > >=0A> > > >=0A> > > > Y=
es, I use a kernel space NFS server. Is it impossible to use the kernel=0A>=
 > > space Linux NFS stack with fuse? Any modifications I can do?=0A> > > >=
=0A=0A__________________________________________________=0ADo You Yahoo!?=
=0ATired of spam?  Yahoo! Mail has the best spam protection around =0Ahttp:=
//mail.yahoo.com

> > You can export FUSE using NFS, we do it all the time. Just make sure you
> > set fsid in the exports file:
> > 
> > /3d *(rw,sync,fsid=1)
> > 
> > Note that it doesn't work perfectly, we still get the occasional hangup
> > when the system is under heavy load but it works well enough.
> 
> 
> I cannot get this to work.

Are you compiling the kernel module from the fuse package?

Miklos

----- Original Message ----=0A> From: Miklos Szeredi <miklos@...=
> To: byaarov@...> Cc: franco@...; fuse-devel@...=
ourceforge.net=0A> Sent: Thursday, October 25, 2007 1:39:28 PM=0A> Subject:=
 Re: [fuse-devel] NFS and Fuse=0A> =0A> > You can export FUSE using NFS, we=
 do it all the time. Just make sure you=0A> > > set fsid in the exports fil=
e:=0A> > > =0A> > > /3d *(rw,sync,fsid=3D1)=0A> > > =0A> > > Note that it d=
oesn't work perfectly, we still get the occasional hangup=0A> > > when the =
system is under heavy load but it works well enough.=0A> > =0A> > =0A> > I =
cannot get this to work.=0A> =0A> Are you compiling the kernel module from =
the fuse package?=0A> =0A> Miklos=0A=0AI am just using the stock kernel fus=
e module that comes with centos=0A=0A______________________________________=
____________=0ADo You Yahoo!?=0ATired of spam?  Yahoo! Mail has the best sp=
am protection around =0Ahttp://mail.yahoo.com

> I am just using the stock kernel fuse module that comes with centos
> 

Ah, the fuse module in the mainline kernel doesn't support NFS
exports.

Try compiling one from the fuse package (use the --enable-kernel-module
configure option).

Miklos