Re: reiser4: mv command lost folder.

[Edward Shishkin <edward.shishkin@gmail.com>]

Danila Beketov wrote:
>> Hello
>>     

Hello.
I have downloaded your metadata.
Thanks.

>>> Need help to return my lost folder, that has disappeared after mv
>>> command execution by magic way.
>>>       

I see this directory, but can not extract it so far.. It's old name
has been removed, but new one wasn't created for some reasons.

Eventually I have found that all link/unlink stuff in reiser4 is racy:
the process which creates a child takes an exclusive flag
REISER4_IMMUTABLE so that other concurrent processes
should wait on this flag. However, instead of waiting they return
reiser4-specific error number (-E_REPEAT) to the VFS...
Will be fixed.

I'll take a look why fsck don't want to put your poor directory to
lost+found. but it'll take some time (I have only weekends for
reiser4).

The oops below is specific to zen-kernels. Sometimes zen
folks try to fix reiser4 without success, so before sending oopses
to this mailing list please make sure that you use -mm kernels,
or reiser4 stuff against vanilla kernels from kernel.org.

Thank you.
Edward.

>
> May 19 20:04:32 beda kernel: ------------[ cut here ]------------
> May 19 20:04:32 beda kernel: kernel BUG at fs/reiser4/txnmgr.c:1116!
> May 19 20:04:32 beda kernel: invalid opcode: 0000 [#1] PREEMPT
> May 19 20:04:32 beda kernel: last sysfs file:
> /sys/devices/pci0000:00/0000:00:1f.2/host3/target3:0:0/3:0:0:0/block/sdb/dev
> May 19 20:04:32 beda kernel: Modules linked in: vboxnetadp vboxnetflt
> vboxdrv ipv6 oss_usb oss_envy24ht osscore btusb bluetooth nvidia(P)
> uvcvideo videodev v4l1_compat i2c_i801 parport_pc parport i2c_core
> May 19 20:04:32 beda kernel:
> May 19 20:04:32 beda kernel: Pid: 1453, comm: ent:sda8! Tainted: P
>      (2.6.32-gentoo-r7 #1) MS-6728
> May 19 20:04:32 beda kernel: EIP: 0060:[<c10d4625>] EFLAGS: 00010202 CPU: 0
> May 19 20:04:32 beda kernel: EIP is at reiser4_txn_end+0x511/0x55f
> May 19 20:04:32 beda kernel: EAX: 000073cd EBX: 00000000 ECX: 00000001
> EDX: ed46a9a8
> May 19 20:04:32 beda kernel: ESI: f6adfe48 EDI: f661d0ec EBP: f6adfe68
> ESP: f6adfe10
> May 19 20:04:32 beda kernel: DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
> May 19 20:04:32 beda kernel: Process ent:sda8! (pid: 1453, ti=f6ade000
> task=f7083000 task.ti=f6ade000)
> May 19 20:04:32 beda kernel: Stack:
> May 19 20:04:32 beda kernel: f6adfe40 00000000 edce7e00 f6b3ec00
> edce7ee8 edce7e74 ef133100 00000000
> May 19 20:04:32 beda kernel: <0> f70832e8 f7083000 f6adff30 f6adff6c
> ed46a900 f6adff6c 000000a4 00000000
> May 19 20:04:32 beda kernel: <0> 00000000 00000000 00000000 f6adff30
> ed46a900 f661d0dc f6adfe74 c10d467e
> May 19 20:04:32 beda kernel: Call Trace:
> May 19 20:04:32 beda kernel: [<c10d467e>] ? reiser4_txn_restart+0xb/0x1a
> May 19 20:04:32 beda kernel: [<c10d49b3>] ? flush_some_atom+0x326/0x40d
> May 19 20:04:32 beda kernel: [<c10e1a3c>] ? reiser4_writeout+0xe5/0x1af
> May 19 20:04:32 beda kernel: [<c1099d8a>] ? writeback_inodes_wb+0x308/0x398
> May 19 20:04:32 beda kernel: [<c10e2390>] ? entd+0x19a/0x36a
> May 19 20:04:32 beda kernel: [<c10e21f6>] ? entd+0x0/0x36a
> May 19 20:04:32 beda kernel: [<c1036fa3>] ? kthread+0x66/0x68
> May 19 20:04:32 beda kernel: [<c1036f3d>] ? kthread+0x0/0x68
> May 19 20:04:32 beda kernel: [<c10033e3>] ? kernel_thread_helper+0x7/0x14
> May 19 20:04:32 beda kernel: Code: ff ff 83 68 14 01 f6 40 08 08 0f 84
>