Aufs erroneously reporting filesystem is overlapped...

[Chris Ziomkowski]

I am trying to test aufs. I have given up on using unionfs, as it keeps panicing my kernel. Unfortunately, I can't get aufs to run at all.

When I run the following command it doesn't work,

root:/# mount -t aufs none /tmp/autest -o dirs=/tmp/aubr1/:/usbstick/root=ro
mount: wrong fs type, bad option, bad superblock on none,
     missing codepage or helper program, or other error
     (for several filesystems (e.g. nfs, cifs) you might
     need a /sbin/mount.<type> helper program)
     In some cases useful info is found in syslog - try
     dmesg | tail  or so

failure bad /proc/mounts 1

and I get the following on my console:

aufs test_add:412:mount[10624]: /usbstick/root is overlapped



Various outputs below, and bzip2 kernel config is attached.

Any advice is appreciated. Thank you for any assistance and best regards,

Chris
----------------------------------

/proc/mounts shows the following:

root:/sys/fs/aufs# cat /proc/mounts
rootfs / rootfs rw 0 0
/dev/root / ext3 rw,errors=continue,data=ordered 0 0
/proc /proc proc rw 0 0
sysfs /sys sysfs rw 0 0
udev /dev tmpfs rw,mode=755 0 0
devpts /dev/pts devpts rw,gid=4,mode=620 0 0
shm /dev/shm tmpfs rw 0 0
/dev/sda1 /usbstick/root ext3 rw,errors=continue,data=ordered 0 0

root:/# cat /sys/fs/aufs/config
CONFIG_AUFS=m
CONFIG_AUFS_BRANCH_MAX_127=y
CONFIG_AUFS_RR_SQUASHFS=y
CONFIG_AUFS_DEBUG=y
CONFIG_AUFS_MAGIC_SYSRQ=y

root:/# find /sys/module/aufs -type f -print -exec cat {} \;
/sys/module/aufs/parameters/brs
0
/sys/module/aufs/parameters/nwkq
4
/sys/module/aufs/parameters/sysrq
a
/sys/module/aufs/version
20081020
/sys/module/aufs/srcversion
6FF7A235635093295BE44DB
/sys/module/aufs/initstate
live
/sys/module/aufs/refcnt
0
/sys/module/aufs/sections/.note.gnu.build-id
0xffffffffa0078428
/sys/module/aufs/sections/.text
0xffffffffa0044000
/sys/module/aufs/sections/.exit.text
0xffffffffa0078400
/sys/module/aufs/sections/.init.text
0xffffffffa0013000
/sys/module/aufs/sections/.rodata
0xffffffffa0078460
/sys/module/aufs/sections/.rodata.str1.1
0xffffffffa007a442
/sys/module/aufs/sections/__param
0xffffffffa007b8b0
/sys/module/aufs/sections/.rodata.str1.8
0xffffffffa007b928
/sys/module/aufs/sections/.smp_locks
0xffffffffa0080598
/sys/module/aufs/sections/__bug_table
0xffffffffa0080be8
/sys/module/aufs/sections/.data
0xffffffffa0093400
/sys/module/aufs/sections/.gnu.linkonce.this_module
0xffffffffa0094400
/sys/module/aufs/sections/.bss
0xffffffffa00946c0
/sys/module/aufs/sections/.symtab
0xffffffffa0089d38
/sys/module/aufs/sections/.strtab
0xffffffffa008fe40
/sys/module/aufs/notes/.note.gnu.build-id

I am using the latest source from CVS as of Friday, Oct. 24, and according to the output below the version is 20081020. Kernel version is a stock 2.6.26.5 release with patches for squashfs. I am using the standard local.mk. I made no changes to anything...I just typed make. This is on an x86_64 linux from scratch system. with a pure 64 bit gcc compiler. Of course, this is blatantly untrue. Obviously /usbstick does not overlap with anything as I understand the meaning of the term. Has anyone seen this before, and can anyone offer me advice on how to get around this? Right now, I can't find any union file system that will actually run, and this is actually kind of important.

config.bz2
Description: Binary data

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