Loosed files after umount/mount

Loosed files after umount/mount

[Andreas Friesen]

Hello,

I'm experiencing a strange problem with JFFS2 using Linux
3.1.5, 3.4 from kernel.org.git on PowerPC. After unmounting and
remounting the filesystem,
directory is empty.

$ flash_erase /dev/mtd2
$ reboot
$ mount mtd:storage /storage -t jffs2
$ scp root@server:/tmp/settings/*.xml /storage
$ sync
$ umount /storage
$ mount mtd:storage /storage -t jffs2
$ ls /storage
... empty ?????

Any Hints?

-- Andreas Friesen


root@hbm-000c4e:/$lsmod
Module                  Size  Used by
jffs2                  85057  1
lzo_decompress          5219  1 jffs2
lzo_compress            5143  1 jffs2


root@hbm-000c4e:/$uname -a
Linux hbm-000c4e 3.4.0+ #10 PREEMPT Mon Jun 18 20:07:04 CEST 2012 ppc
GNU/Linux

$ cat build/linux/.config | grep JFFS2
CONFIG_JFFS2_FS=m
CONFIG_JFFS2_FS_DEBUG=0
CONFIG_JFFS2_SUMMARY=y
CONFIG_JFFS2_COMPRESSION_OPTIONS=y
CONFIG_JFFS2_LZO=y
CONFIG_JFFS2_RTIME=y
CONFIG_JFFS2_CMODE_PRIORITY=y

$ cat build/linux/.config | grep MTD
CONFIG_MTD=y
CONFIG_MTD_OF_PARTS=y
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_CFI=y
CONFIG_MTD_GEN_PROBE=y
CONFIG_MTD_MAP_BANK_WIDTH_1=y
CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
CONFIG_MTD_CFI_I1=y
CONFIG_MTD_CFI_I2=y
CONFIG_MTD_CFI_INTELEXT=y
CONFIG_MTD_CFI_UTIL=y
CONFIG_MTD_PHYSMAP_OF=y
CONFIG_OF_MTD=y


dmesg  output:
[    0.476401] ff000000.flash: Found 1 x16 devices at 0x0 in 8-bit
bank. Manufacturer ID 0x000089 Chip ID 0x000018
[    0.486776] Intel/Sharp Extended Query Table at 0x0031
[    0.492098] Intel/Sharp Extended Query Table at 0x0031
[    0.497412] Using buffer write method
[    0.501208] cfi_cmdset_0001: Erase suspend on write enabled
[    0.506957] erase region 0: offset=0x0,size=0x20000,blocks=128
[    0.508533] 8 ofpart partitions found on MTD device ff000000.flash
[    0.514996] Creating 8 MTD partitions on "ff000000.flash":
[    0.520718] 0x000000000000-0x000000200000 : "kernel"
[    0.527869] 0x000000200000-0x000000600000 : "rootfs"
[    0.535008] 0x000000600000-0x000000c00000 : "storage"
[    0.542277] 0x000000c00000-0x000000f00000 : "parameter"
[    0.549535] 0x000000f00000-0x000000f40000 : "uboot"
[    0.556607] 0x000000f40000-0x000000f60000 : "ubootenv"
..
[    8.914470] jffs2: version 2.2. (SUMMARY)  © 2001-2006 Red Hat, Inc.

Re: Loosed files after umount/mount

[Artem Bityutskiy]

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On Mon, 2012-06-18 at 22:29 +0200, Andreas Friesen wrote:
> Hello,
> 
> I'm experiencing a strange problem with JFFS2 using Linux
> 3.1.5, 3.4 from kernel.org.git on PowerPC. After unmounting and
> remounting the filesystem,
> directory is empty.

So is it 3.4 or 3.1.5?

> $ flash_erase /dev/mtd2
> $ reboot
> $ mount mtd:storage /storage -t jffs2
> $ scp root@server:/tmp/settings/*.xml /storage
If you add "sleep 20" here - does it help?
> $ sync
> $ umount /storage
> $ mount mtd:storage /storage -t jffs2
> $ ls /storage
> ... empty ?????
> 
> Any Hints?

Is it NOR or NAND? My first guess is that the write-buffer is not
synced. Or there are issues with the driver, try to run mtd tests.

-- 
Best Regards,
Artem Bityutskiy

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Re: Loosed files after umount/mount

[Andreas Friesen]

At Wed, 27 Jun 2012 14:00:58 +0300,
Artem Bityutskiy wrote:
> 
> [1  <text/plain; UTF-8 (quoted-printable)>]
> On Mon, 2012-06-18 at 22:29 +0200, Andreas Friesen wrote:
> > Hello,
> > 
> > I'm experiencing a strange problem with JFFS2 using Linux
> > 3.1.5, 3.4 from kernel.org.git on PowerPC. After unmounting and
> > remounting the filesystem,
> > directory is empty.
> 
> So is it 3.4 or 3.1.5?

The board is a MPC5200B board  with NOR Flash (like IceCube)
I have seen the problem in 3.1.5 and 3.4.


> > $ flash_erase /dev/mtd2
> > $ reboot
> > $ mount mtd:storage /storage -t jffs2
> > $ scp root@server:/tmp/settings/*.xml /storage
> If you add "sleep 20" here - does it help?

The tests with sleep() of 1s to 3min were unsuccessful.

> Is it NOR or NAND? My first guess is that the write-buffer is not
> synced. Or there are issues with the driver, try to run mtd tests.

mtd tests work fine.

> -- 
> Best Regards,
> Artem Bityutskiy
> [2 This is a digitally signed message part <application/pgp-signature (7bit)>]
> 

Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany | www.hbm.com 

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Re: Loosed files after umount/mount

[Artem Bityutskiy]

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On Fri, 2012-06-29 at 11:03 +0200, Andreas Friesen wrote:
> At Wed, 27 Jun 2012 14:00:58 +0300,
> Artem Bityutskiy wrote:
> > 
> > [1  <text/plain; UTF-8 (quoted-printable)>]
> > On Mon, 2012-06-18 at 22:29 +0200, Andreas Friesen wrote:
> > > Hello,
> > > 
> > > I'm experiencing a strange problem with JFFS2 using Linux
> > > 3.1.5, 3.4 from kernel.org.git on PowerPC. After unmounting and
> > > remounting the filesystem,
> > > directory is empty.
> > 
> > So is it 3.4 or 3.1.5?
> 
> The board is a MPC5200B board  with NOR Flash (like IceCube)
> I have seen the problem in 3.1.5 and 3.4.

Can you try running UBI tests and see what happens? They are in
mtd-utils/tests/ubi AFAIR.

Also, is there any kernel which worked for you? Can you bisect?

-- 
Best Regards,
Artem Bityutskiy

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Re: Loosed files after umount/mount

[Andreas Friesen]

Hello Artem,

> Can you try running UBI tests and see what happens? They are in
> mtd-utils/tests/ubi AFAIR.
> 

Thanks for the reply. The problem is far localized.
The solution must be found yet. Here is the link:

http://lists.infradead.org/pipermail/linux-mtd/2012-June/042665.html

Regards,
Andreas

Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany | www.hbm.com 

Registered as GmbH (German limited liability corporation) in the commercial register at the local court of Darmstadt, HRB 1147  
Company domiciled in Darmstadt | CEO: Andreas Huellhorst | Chairman of the board: James Charles Webster

Als Gesellschaft mit beschraenkter Haftung eingetragen im Handelsregister des Amtsgerichts Darmstadt unter HRB 1147 
Sitz der Gesellschaft: Darmstadt | Geschaeftsfuehrung: Andreas Huellhorst | Aufsichtsratsvorsitzender: James Charles Webster

The information in this email is confidential. It is intended solely for the addressee. If you are not the intended recipient, please let me know and delete this email.

Die in dieser E-Mail enthaltene Information ist vertraulich und lediglich fur den Empfaenger bestimmt. Sollten Sie nicht der eigentliche Empfaenger sein, informieren Sie mich bitte kurz und loeschen diese E-Mail.