Filesystem in RTEMS

[Russell Haley]

FreeBSD doesn't have a flash filesystem that I know of, so at one point I
looked into porting CHFS over:

http://chewiefs.sed.hu/

I'm not sure if it still lacks NOR support. FreeBSD, however, doesn't have
flash drivers to support a file system yet. The support it currently has
isn't viable as the error correction code is too rudimentary.

Russ

On Tue, Oct 24, 2017 at 9:01 AM, Russell Haley <russ.haley at gmail.com> wrote:

>
>
> On Mon, Oct 23, 2017 at 11:42 AM, Joel Sherrill <joel at rtems.org> wrote:
>
>>
>>
>> On Mon, Oct 23, 2017 at 10:37 AM, Russell Haley <russ.haley at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> Just wanted to ask about licensing. ‎Jffs2 is expressly GPL code. My
>>> understanding means that the entirety of your work now becomes GPL licensed
>>> because everything is statically linked together in RTEMS. Is this
>>> understanding incorrect?
>>>
>>
>> It is GPLv2 with a linking exception like the GCC language run-times used
>> to use. See
>>
>> https://github.com/atgreen/RTEMS/blob/master/LICENSE.JFFS2
>>
>> and read the last two paragraphs.
>>
>> --joel
>>
>>
> Thanks Joel!
>
> Russ
>
>>
>>> Thanks,
>>> Russ
>>>
>>> Sent from my BlackBerry 10 smartphone on the Virgin Mobile network.
>>> *From: *jameszxj
>>> *Sent: *Monday, October 23, 2017 12:13 AM
>>> *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 wi
>>> th 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
>>> <https://maps.google.com/?q=Dornierstr.+4&entry=gmail&source=g>,
>>> D-82178 Puchheim, Germany
>>> Phone   : +49 89 189 47 41-16
>>> Fax     : +49 89 189 47 41-09
>>> E-Mail  : sebastian.huber at embedded-brains.de
>>> PGP     : Public key available on request.
>>>
>>> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>>>
>>> _______________________________________________
>>> users mailing list
>>> users at rtems.org
>>> http://lists.rtems.org/mailman/listinfo/users
>>>
>>>
>>> _______________________________________________
>>> users mailing list
>>> users at rtems.org
>>> http://lists.rtems.org/mailman/listinfo/users
>>>
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rtems.org/pipermail/users/attachments/20171024/87b3bfce/attachment-0002.html>