On Thu, 2007-11-15 at 07:22 -0800, Nabeel Saad wrote:
> Hello,
>
> I have a question about using ZFS with Fuse. A little bit of background of
> what we've been doing first... We recently had an issue with a Solaris
> server where the permissions of the main system files in /etc and such were
> changed. On server restart, Solaris threw an error and it was not possible
> to log in, even as root.
>
> So, given that it's the only Solaris machine we have, we took out the drive
> and after much trouble trying with different machines, we connected it to
> Linux 2005 Limited Edition server using a USB to SATA connector. The linux
> machine now sees the device in /dev/sda* and I can confirm this by doing the
> following:
>
> [root]# fdisk sda
>
> Command (m for help): p
>
> Disk sda (Sun disk label): 16 heads, 149 sectors, 65533 cylinders
> Units = cylinders of 2384 * 512 bytes
>
> Device Flag Start End Blocks Id System
> sda1 1719 11169 11264400 2 SunOS root
> sda2 u 0 1719 2049048 3 SunOS swap
> sda3 0 65533 78115336 5 Whole disk
> sda5 16324 65533 58657128 8 SunOS home
> sda6 11169 16324 6144760 7 SunOS var
>
> Given that Solaris uses ZFS,
Solaris *can* use ZFS. ZFS root isn't supported by any distro (other
than perhaps Indiana). The filesystem you are trying to mount is
probably UFS.
> we figured to be able to change the permissions, we'll need to be able to
> mount the device. So, we found Fuse, downloaded, installed it along with
> ZFS. Everything went as expected until the creation of the pool for some
> reason. We're interested in either sda1, sda3 or sda5, we'll know better
> once we can mount them...
>
> So, we do ./run.sh & and then the zpool and zfs commands are available. My
> ZFS questions come here, once we run the create command, I get the error
> directly:
>
> [root]# zpool create mypool sda
If you want to destroy the data on /dev/sda then this is a good start.
IF it were ZFS (which it probably isn't) you'd want to be using "zpool
import".
> fuse: mount failed: Invalid argument
> cannot mount 'mypool': Input/output error
>
> However, if I list the pools, clearly it's been created:
>
> [root]# zpool list
> NAME SIZE USED AVAIL CAP HEALTH ALTROOT
> mypool 74.5G 88K 74.5G 0% ONLINE -
>
> It seems the issue is with the mounting, and I can't understand why:
>
> [root]# zfs mount mypool
> fuse: mount failed: Invalid argument
> cannot mount 'mypool': Input/output error
>
> [root]# zfs mount
>
> I had searched through the source code trying to figure out what argument was
> considered invalid and found the following:
>
> 477 if (res == -1) {
> 478 /*
> 479 * Maybe kernel doesn't support unprivileged mounts, in this
> 480 * case try falling back to fusermount
> 481 */
> 482 if (errno == EPERM) {
> 483 res = -2;
> 484 } else {
> 485 int errno_save = errno;
> 486 if (mo->blkdev && errno == ENODEV &&
> !fuse_mnt_check_fuseblk())
> 487 fprintf(stderr, "fuse: 'fuseblk' support missing\n");
> 488 else
> 489 fprintf(stderr, "fuse: mount failed: %s\n",
> 490 strerror(errno_save));
> 491 }
> 492
> 493 goto out_close;
> 494 }
>
> in the following file:
>
> http://cvs.opensolaris.org/source/xref/fuse/libfuse/mount.c
This is the OpenSolaris fuse code, you're using FUSE on Linux. You
should check with the Linux FUSE community...
-Mark
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