Filesystem in RTEMS

[xuelin.tian at qkmtech.com]

I use JFFS2 on Xilinx Zedboard, QSPI. 

The flash I use has a hybrid combination of 4KB and 64KB sectors. I just ignored the 4KB sectors, and use 64KB sectors only. 
So, the size of block is 64KB same the size of sector in my case.

I think it may be related to my device drivers... but, I am not sure about this. 

What is your device driver in your case? Using QSPI handlers from Xilinx BSP directly?



Best wishes,
xuelin.tian at qkmtech.com
 
From: jameszxj
Date: 2017-10-23 15:13
To: rtems-users at rtems.org
Subject: Re: Filesystem in RTEMS
I have encountered a problem like this. 
I set wrong block size.

Maybe you can try to change the block size.

I use jffs2 on xilinx zc7020 board, QSPI
------------------ Original ------------------
From:  "Sebastian Huber";<sebastian.huber at embedded-brains.de>;
Date:  Mon, Oct 23, 2017 01:07 PM
To:  "xuelin.tian at qkmtech.com"<xuelin.tian at qkmtech.com>;
Cc:  "users at rtems.org"<users at rtems.org>; 
Subject:  Re: Filesystem in RTEMS

On 22/10/17 12:00, xuelin.tian at qkmtech.com wrote:
> I have mounted JFFS2 successfully, according to the return value.
> Yes, it takes some time to do the mounting work.
>
> But, when I downloaded a file like "test.txt" into flash via FTP and 
> restarted the system, error came up.

Unmount the file system before you restart the system.

>
> <5>JFFS2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01FC0028: 0xE5DF instead
> <5>JFFS2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01FC002C: 0xE5DF instead
> <5>JFFS2: Further such events for this erase block will not be printed
> <5>JFFS2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01FD0000: 0x000C instead
> <5>JFFS2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01FD0004: 0xB0B1 instead
> <5>JFFS2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01FD0008: 0x0054 instead
> <5>JFFS2: Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes
> <5>JFFS2: empty_blocks 0, bad_blocks 0, c->nr_blocks 510
> mount failed.
>
> Everything worked well, after erasing the whole flash. But errors came 
> up without erasing it.

Make sure your flash driver works correctly. It must support bytewise 
programming.

-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
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