-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi
I'm the maintainer of http://www.redwall-firewall.com. I'm currently trying to get aufs working as an alternative to unionfs which im currently using for the /var filesystem as well as for the /etc (this way i can "detect" changed files.. and save them on a floppy for instance) filesystem. Currently i'm stuck with the following Problem: - --> The System is up and running with aufs mounted to /etc (and /var) - --> This Problem ONLY occurs if i'm working on the aufs /etc mountpoint - --> there is a tmpfs mounted to /CHANGES - --> /CHANGES, /etc and /var are writeable... everything else is RO - --> Kernel is 2.6.18 - --> mount: mount-2.12r - --> aufs Version: CVS checkout & updates from yesterday (08. March 07) I performed these steps to reproduce the segfault: # unionctl /etc --list /CHANGES/etc (rw-) /REDWALL/union_branches/etc (r--) # mount | grep "/etc" aufs on /etc type aufs (rw,xino=/CHANGES/etc/.aufs.xino,br:/CHANGES/etc=rw:/REDWALL/union_branches/etc=ro) # cat /proc/mounts | grep "/etc" aufs /etc aufs rw,xino=/CHANGES/etc/.aufs.xino,br:/CHANGES/etc=rw:/REDWALL/union_branches/etc=ro 0 0 # mkdir /CHANGES/tmp/tempetc # mount -o remount,prepend:/CHANGES/tmp/tempetc=rw,xino=/CHANGES/tmp/tempetc/.aufs.xino /etc # unionctl /etc --list /CHANGES/tmp/tempetc (rw-) /CHANGES/etc (rw-) /REDWALL/union_branches/etc (r--) # mount | grep "/etc" aufs on /etc type aufs (rw,xino=/CHANGES/tmp/tempetc/.aufs.xino,br:/CHANGES/tmp/tempetc=rw:/CHANGES/etc=rw:/REDWALL/union_branches/etc=ro) # cat /proc/mounts | grep "/etc" aufs /etc aufs rw,xino=/CHANGES/tmp/tempetc/.aufs.xino,br:/CHANGES/tmp/tempetc=rw:/CHANGES/etc=rw:/REDWALL/union_branches/etc=ro 0 0 # cat /CHANGES/tmp/tempetc/mtab | grep "/etc" aufs /etc aufs rw,xino=/CHANGES/tmp/tempetc/.aufs.xino,br:/CHANGES/tmp/tempetc=rw:/CHANGES/etc=rw:/REDWALL/union_branches/etc=ro 0 0 # mount -o remount,mod:/CHANGES/etc=ro,del:/CHANGES/etc /etc ; echo $? 0 - --> As you can see... this command returned no error # unionctl /etc --list /CHANGES/tmp/tempetc (rw-) /REDWALL/union_branches/etc (r--) - --> This Looks fine as well.... BUT: # mount Segmentation fault - --> At this time... as soon as i issue the mount command i get an OPS (attached to the end of the mail) # cat /etc/mtab | grep "/etc" aufs /etc aufs rw,xino=/CHANGES/tmp/tempetc/.aufs.xino,br:/CHANGES/tmp/tempetc=rw:/REDWALL/union_branches/etc=ro 0 0 # cat /proc/mounts | grep "/etc" aufs /etc aufs rw,xino=/CHANGES/tmp/tempetc/.aufs.xino,br:/CHANGES/tmp/tempetc=rw:/REDWALL/union_branches/etc=ro 0 0 # dmesg - ------------[ cut here ]------------ Kernel BUG at [verbose debug info unavailable] invalid opcode: 0000 [#1] SMP Modules linked in: ipt_ULOG iptable_filter ip_tables x_tables rtc usbcore shpchp pci_hotplug i2c_piix4 i2c_core mptspi mptscsih mptbase pcnet32 aufs CPU: 0 EIP: 0060:[<cb03afa1>] Not tainted VLI EFLAGS: 00010246 (2.6.18.3-rw #1) EIP is at aufs_permission+0x8e/0x21e [aufs] eax: 00000000 ebx: c93a299c ecx: c93a299c edx: 00000000 esi: c93a299c edi: 00000000 ebp: 00000000 esp: c4fc9e18 ds: 007b es: 007b ss: 0068 Process mount (pid: 11653, ti=c4fc8000 task=c8d44030 task.ti=c4fc8000) Stack: ca1e5a00 00000000 00000000 ca2d6dc0 c342a894 ca2d6cc0 00000000 00000000 c64ac90c 00000101 00000001 00000000 c3b06ef0 c5719b7c 00001000 b7fbe17c c3875000 00000000 c3875000 c9a5f840 c864b580 00000001 00000000 c8eaf3c0 Call Trace: [<c0161795>] permission+0x9b/0xd4 [<c01617e1>] vfs_permission+0x13/0x17 [<c01632f9>] may_open+0x53/0x1ab [<c01636c5>] open_namei+0x274/0x5e1 [<c013ded7>] filemap_nopage+0x189/0x301 [<c0155898>] do_filp_open+0x29/0x3f [<c0155b1c>] do_sys_open+0x3b/0xaf [<c0155ba3>] sys_open+0x13/0x17 [<c010278d>] sysenter_past_esp+0x56/0x79 Code: ff 74 24 74 e8 8c 31 00 00 89 c7 5b 85 c0 74 1b 8b 4c 24 74 0f b7 50 28 0f b7 41 28 81 e2 00 f0 00 00 25 00 f0 00 00 39 c2 74 02 <0f> 0b c7 44 24 0c 00 00 00 00 ff 74 24 74 e8 14 30 00 00 0f be EIP: [<cb03afa1>] aufs_permission+0x8e/0x21e [aufs] SS:ESP 0068:c4fc9e18 Any help on how to fix this.... or maybe it did something wrong... is very much appreciated!.... Please let me know... if you need any further information (sorry... i don't have strace available at this system) Cheers Marcel -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFF8X1SoK1zcv+dzJoRAkSvAJ478oMq+eWgy+4Muy/gL1DgZTK8yQCgnc/3 cbrjfSUC3V0xI4G+IX4BaoA= =9sLs -----END PGP SIGNATURE----- ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
