ZFS + xattr -> panic loop

[Steven Hartland]

I've recommend moving to 10.1 and seeing if your still see the same issue.

If your zpool is corrupt and this can't recover from it you may need to 
restore from a backup.

On 13/11/2014 23:18, javocado wrote:
> Apologies:
>
> FreeBSD hostname 8.3-RELEASE FreeBSD 8.3-RELEASE #1: Wed Sep 18 
> 16:59:03 MDT 2013    amd64
>
> On Thu, Nov 13, 2014 at 12:20 PM, Steven Hartland 
> <killing at multiplay.co.uk <mailto:killing at multiplay.co.uk>> wrote:
>
>     Alwas good to include which version of the OS your talking about
>     (uname -a)
>
>
>     On 13/11/2014 19:43, javocado wrote:
>
>         After running an rsync (upload) into my zfs filesystem using the
>         --fake-super option (which stores permissions in extended
>         attributes) the
>         zfs filesystem has somehow become corrupt. When booting the
>         system it
>         panic's upon zfs startup:
>
>         panic: solaris assert: VFS_ROOT(vfsp, LK_EXCLUSIVE, &vp) == 0,
>         file:
>         /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
>         , line: 1170
>         cpuid = 12
>         KDB: stack backtrace:
>         #0 0xffffffff8034b3ae at kdb_backtrace+0x5e
>         #1 0xffffffff803185c7 at panic+0x187
>         #2 0xffffffff80ab8213 at zfs_mount+0x563
>         #3 0xffffffff803a2635 at vfs_donmount+0xdc5
>         #4 0xffffffff803a3133 at nmount+0x63
>         #5 0xffffffff80553284 at amd64_syscall+0x1f4
>         #6 0xffffffff8053bc2c at Xfast_syscall+0xfc
>
>         I was able to boot the system by setting the filesystem:
>
>         canmount=off
>
>         However, I am still unable to mount it manually without
>         causing a similar
>         panic.
>
>         So, setting the cause of the panic aside for the moment, I
>         just want to get
>         to the data. I'd like to think I can do that by turning off
>         xattrs and
>         mounting it read-only however:
>
>         # zfs set xattr=off pool/data
>         property 'xattr' not supported on FreeBSD: permission denied
>
>         How can I turn that off?
>
>         Second or alternately, if I want to just dump the filesystem
>         out excluding
>         the extended attributes, so that I have a clean, mountable
>         data set, how
>         would I do that?
>
>         Thank you!
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