xattr support for JFFS3

xattr support for JFFS3

[Keshavamurthy, Anil S]

Hi,
	I am new to this mailing list but would like to contribute to
xattr for flash file system. While looking at the archive seems like
jffs2 is just a bug fix only and any new feature development should go
to jffs3. So here is my question.
1) Is JFFS3 a completely rewritten file system? If true, what stage are
we w.r.t JFFS3? 
2) Where can I find the sources for JFFS3? Sorry, if this is a stupid
question.


Thanks and appreciate your help.

-Anil

Re: xattr support for JFFS3

[Josh Boyer]

On Wed, 2005-02-23 at 15:31 -0800, Keshavamurthy, Anil S wrote:
> Hi,
> 	I am new to this mailing list but would like to contribute to
> xattr for flash file system. While looking at the archive seems like
> jffs2 is just a bug fix only and any new feature development should go
> to jffs3. So here is my question.

xattr support seems to be a popular topic these days.  You might want to
take a look at this thread on the lkml:

http://lkml.org/lkml/2005/2/22/85

Lorenzo already has something started.  Perhaps the two of you could
work together.

> 1) Is JFFS3 a completely rewritten file system? If true, what stage are
> we w.r.t JFFS3? 

No, JFFS3 is a clone of JFFS2 with some minor changes and a new node
type.  The code bases will begin to differ as new features are added to
JFFS3.

> 2) Where can I find the sources for JFFS3? Sorry, if this is a stupid
> question.

It can be found in the MTD CVS tree.  It's also available in the nightly
tarballs.  See http://linux-mtd.infradead.org

josh

Re: xattr support for JFFS3

[Keshavamurthy Anil S]

On Wed, Feb 23, 2005 at 06:58:19PM -0600, Josh Boyer wrote:
> On Wed, 2005-02-23 at 15:31 -0800, Keshavamurthy, Anil S wrote:
> > Hi,
> > 	I am new to this mailing list but would like to contribute to
> > xattr for flash file system. While looking at the archive seems like
> > jffs2 is just a bug fix only and any new feature development should go
> > to jffs3. So here is my question.
> 
> xattr support seems to be a popular topic these days.  You might want to
> take a look at this thread on the lkml:
> 
> http://lkml.org/lkml/2005/2/22/85
> 
> Lorenzo already has something started.  Perhaps the two of you could
> work together.
Sure, I will take a look at his patch and will work with him to
get this feature into JFFS3.

Thanks,
Anil

Re: xattr support for JFFS3

[Artem B. Bityuckiy]

Keshavamurthy, Anil S wrote:
> Hi,
> 	I am new to this mailing list but would like to contribute to
> xattr for flash file system. While looking at the archive seems like
> jffs2 is just a bug fix only and any new feature development should go
> to jffs3. So here is my question.
> 1) Is JFFS3 a completely rewritten file system? If true, what stage are
> we w.r.t JFFS3? 
> 2) Where can I find the sources for JFFS3? Sorry, if this is a stupid
> question.
Well, the situation with JFFS3, as *I* see it, is as follows.
Thus far, JFFS3 is on its design stage. There are a lot of interesting 
ideas and proposals (including xattr) exist. I'm trying to summarize 
them and to keep track of them in the "JFFS2 design issues" document 
which one might find either on the MTD Web page or in CVS 
(fs/jffs3/JFFS3design.tex). I'm trying to keep track of good offers 
there. I'm limited in time but I'm doing my best.

The JFFS3 stuff which you may find in MTD CVS is merely the test 
platform where one could try new features.

> 
> 
> Thanks and appreciate your help.
> 
> -Anil
> 
> 
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
> 

-- 
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.

Re: xattr support for JFFS3

[Lorenzo Hernández García-Hierro]

[-- Attachment #1: Type: text/plain, Size: 1644 bytes --]

El mié, 23-02-2005 a las 17:15 -0800, Keshavamurthy Anil S escribió:
> On Wed, Feb 23, 2005 at 06:58:19PM -0600, Josh Boyer wrote:
> > On Wed, 2005-02-23 at 15:31 -0800, Keshavamurthy, Anil S wrote:
> > > Hi,
> > > 	I am new to this mailing list but would like to contribute to
> > > xattr for flash file system. While looking at the archive seems like
> > > jffs2 is just a bug fix only and any new feature development should go
> > > to jffs3. So here is my question.
> > 
> > xattr support seems to be a popular topic these days.  You might want to
> > take a look at this thread on the lkml:
> > 
> > http://lkml.org/lkml/2005/2/22/85
> > 
> > Lorenzo already has something started.  Perhaps the two of you could
> > work together.
> Sure, I will take a look at his patch and will work with him to
> get this feature into JFFS3.

Fine, it could be great if, apart of working together which would be a
pleasure for me, creating a work team for this.

I've read the tech. specs. of JFFS2 as David recommended to me, so, we
should separate two possible solutions:

	- use a new node type(s)     <- what David likes (& wants AFAIK)
	- use reiserfs style-storage <- what I have done partially

We need also a little road-map and to-do list to know what exactly needs
to be done in each code "section" to achieve our goal.

Just let me know when do you want to start, I would like to talk with
you at #mtd in irc.freenode.org if it's possible.

Thanks in advance and for your interest,
Cheers.
-- 
Lorenzo Hernández García-Hierro <lorenzo@gnu.org> 
[1024D/6F2B2DEC] & [2048g/9AE91A22][http://tuxedo-es.org]

[-- Attachment #2: Esta parte del mensaje está firmada digitalmente --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

Re: xattr support for JFFS3

[Keshavamurthy Anil S]

On Thu, Feb 24, 2005 at 04:42:02PM +0100, Lorenzo Hernández García-Hierro wrote:
> I've read the tech. specs. of JFFS2 as David recommended to me, so, we
> should separate two possible solutions:
Can you please point me to the same spec.
> 
> 	- use a new node type(s)     <- what David likes (& wants AFAIK)
> 	- use reiserfs style-storage <- what I have done partially
> 
> We need also a little road-map and to-do list to know what exactly needs
> to be done in each code "section" to achieve our goal.
Perfect.
> 
> Just let me know when do you want to start, I would like to talk with
> you at #mtd in irc.freenode.org if it's possible.
We can start from next monday, let me know what time you want to chat with
me next monday.

thanks once again.
Anil

Re: xattr support for JFFS3

[Artem B. Bityuckiy]

Keshavamurthy Anil S wrote:
> We can start from next monday, let me know what time you want to chat 
with
> me next monday.
I offer to keep you work public as the community might assist you. 
Furthermore, you probably may use the existing JFFS3 design document and 
to add your xattr design there.

--
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.

Re: xattr support for JFFS3

[Thomas Gleixner]

On Fri, 2005-02-25 at 00:56, Keshavamurthy Anil S wrote:
> On Thu, Feb 24, 2005 at 04:42:02PM +0100, Lorenzo Hernández García-Hierro wrote:
> > I've read the tech. specs. of JFFS2 as David recommended to me, so, we
> > should separate two possible solutions:
> Can you please point me to the same spec.
> > 
> > 	- use a new node type(s)     <- what David likes (& wants AFAIK)
> > 	- use reiserfs style-storage <- what I have done partially

I backup Davids POV. xattrs should go into new node type(s) rather than
into the reiser style "everything is a directory" approach. It's an ugly
hack. I prefer designed functionality over the patchwork approach. I
know that it will take more time, but it will fit better and will be
easier to maintain.

tglx

Re: xattr support for JFFS3

[Lorenzo Hernández García-Hierro]

[-- Attachment #1: Type: text/plain, Size: 679 bytes --]

El jue, 24-02-2005 a las 15:56 -0800, Keshavamurthy Anil S escribió:
> Can you please point me to the same spec.

Sure ;)
http://sources.redhat.com/jffs2/jffs2.pdf
http://sources.redhat.com/jffs2/jffs2-html/

> Perfect.

http://wiki.tuxedo-es.org/tuxedo/JFFS2xattr/RoadMap

> We can start from next monday, let me know what time you want to chat with
> me next monday.

OK, we could meet in the #mtd channel (irc.freenode.org) at 20:10 CET.
Let me know if it's OK for you.

> thanks once again.

Thanks to you for your interest ;).

Cheers,
-- 
Lorenzo Hernández García-Hierro <lorenzo@gnu.org> 
[1024D/6F2B2DEC] & [2048g/9AE91A22][http://tuxedo-es.org]

[-- Attachment #2: Esta parte del mensaje está firmada digitalmente --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

Re: xattr support for JFFS3

[Lorenzo Hernández García-Hierro]

[-- Attachment #1: Type: text/plain, Size: 600 bytes --]

El vie, 25-02-2005 a las 09:19 +0000, Artem B. Bityuckiy escribió:
> I offer to keep you work public as the community might assist you. 
> Furthermore, you probably may use the existing JFFS3 design document and 
> to add your xattr design there.

That's what we are going to do, the development is going on JFFS3, and
of course I've read the specifications and design of JFFS2 at RH's JFFS2
site (thanks to David for pointing this out).

Thanks for the comments,
Cheers. 
-- 
Lorenzo Hernández García-Hierro <lorenzo@gnu.org> 
[1024D/6F2B2DEC] & [2048g/9AE91A22][http://tuxedo-es.org]

[-- Attachment #2: Esta parte del mensaje está firmada digitalmente --]
[-- Type: application/pgp-signature, Size: 189 bytes --]

Re: xattr support for JFFS3

[Lorenzo Hernández García-Hierro]

[-- Attachment #1: Type: text/plain, Size: 1055 bytes --]

El vie, 25-02-2005 a las 10:51 +0100, Thomas Gleixner escribió:
> I backup Davids POV. xattrs should go into new node type(s) rather than
> into the reiser style "everything is a directory" approach. It's an ugly
> hack. I prefer designed functionality over the patchwork approach. I
> know that it will take more time, but it will fit better and will be
> easier to maintain.

Me too, ignore my patches that use the weird reiserfs-based
implementation, among that they wouldn't compile yet :)

And yes, we can't break ABI/API compatibility by adding ugly hacks, so,
I will do as David commented, will try to start some new work on it this
weekend, but I'm still busy with exams and other stuff.

Thanks again for the comments,
Cheers.
PS: Those who are interested in this and also in contributing and
working together to get it, would write their names and contact info at
http://wiki.tuxedo-es.org/tuxedo/JFFS2xattr ?
-- 
Lorenzo Hernández García-Hierro <lorenzo@gnu.org> 
[1024D/6F2B2DEC] & [2048g/9AE91A22][http://tuxedo-es.org]

[-- Attachment #2: Esta parte del mensaje está firmada digitalmente --]
[-- Type: application/pgp-signature, Size: 189 bytes --]