Implementing minimal EXT2 filesystem on native PS2

[raema]

Hi all,

I'm planning to implement the basic functionalities of the EXT2 file system for the "native" PS2 (i.e not on the ps2linux).

Before starting my work, I did a search, and find a subject of this, dating from 2005 ...

http://forums.ps2dev.org/viewtopic.php?p=6379#6379

If the user mharris could contact me it would be a good start of my project. But this user activity seems ending in this same year (2005), so I fear it won't happen ...

If anyone know how to contact him ... or have some sources on this subject, I would greatly appreciate it.


I've already retrieve some other projects ext2 implementation, but I didn't settle to the one to port. Any subjection ?

(the first step would be to have only read access, no permission check, no extended attributes, no badblock listing, no longname, ... !)

Thank you for your help.

[jimparis]

For relatively simple implementations, you might check the ext2/3/4 support in grub2, u-boot, or other bootloaders.

[raema]

Hum, thank you for this suggestion.

I've just look quickly at the grub_legacy code, but I didn't find the expected usual functions ... As I know that grub uses it's "stage1" to access the filesystem, and then read the "/boot" directory, there should be what I need indeed.

I guess I need to read the code more toroughly

[jimparis]

In grub-legacy it would be in stage2... check stage2/fsys_ext2fs.c.

Also check grub2 and u-boot, they're probably better. For example:
http://git.denx.de/?p=u-boot.git;a=blob ... c4;hb=HEAD

[raema]

That is the exact file I checked ;) due to its name ...

I prefer stick to grub_legacy, as it is more "stable" and with less functionnalities (which should ease the work)

But I could have a look at the other program nevertheless.

Thanks.

I've seen that mharris looks like a wellknown contributor to ps2dev, did someine know if he is still joignable somewhere ?