Problem mounting after using Fuse to simulate block device

[Boris Dinkevich]

Hello everyone


I need to create a virtual block device. The individual blocks are read via
Ethernet.
So I choose to use FUSE:

1. Create a fake FS with only one file.
2. The file is a full image of a disk drive.
3. Based on hello.c example, so everything is ReadOnly


The problem:
- Trying to mount the file via FUSE fails with (even when mounting
ReadOnly):
    "  /tmp/fuse/disk.img: Permission denied  "

(There is no problem mounting the file to the FS)

Any leads ? Or perhaps different approaches to solving my initial problem ?

Thanks in advance
Boris
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[Miklos Szeredi]

On Sun, 25 Oct 2009, Boris Dinkevich wrote:
> Hello everyone
>
>
> I need to create a virtual block device. The individual blocks are read via
> Ethernet.

Are you aware of NBD, which essentially does the same?

> So I choose to use FUSE:
>
> 1. Create a fake FS with only one file.
> 2. The file is a full image of a disk drive.
> 3. Based on hello.c example, so everything is ReadOnly
>
>
> The problem:
> - Trying to mount the file via FUSE fails with (even when mounting
> ReadOnly):
>     "  /tmp/fuse/disk.img: Permission denied  "

With what command do you mount your filesystem?  Do you run it as
root?

Thanks,
Miklos

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[Boris Dinkevich]

Hello Miklos

I have indeed switched to NBD as its very easy to use and exactly fits my
needs.

Although I am still not sure why the FUSE based mounts failed. I used
:"mount -o loop=/dev/loop3 etc.."

Boris

On Thu, Nov 5, 2009 at 3:54 PM, Miklos Szeredi <miklos@...> wrote:

> On Sun, 25 Oct 2009, Boris Dinkevich wrote:
> > Hello everyone
> >
> >
> > I need to create a virtual block device. The individual blocks are read
> via
> > Ethernet.
>
> Are you aware of NBD, which essentially does the same?
>
> > So I choose to use FUSE:
> >
> > 1. Create a fake FS with only one file.
> > 2. The file is a full image of a disk drive.
> > 3. Based on hello.c example, so everything is ReadOnly
> >
> >
> > The problem:
> > - Trying to mount the file via FUSE fails with (even when mounting
> > ReadOnly):
> >     "  /tmp/fuse/disk.img: Permission denied  "
>
> With what command do you mount your filesystem?  Do you run it as
> root?
>
> Thanks,
> Miklos
>

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