I am a student and a kernel newbie trying to port a ext3 copy on write
utility from 2.4 kernel to the 2.6 kernel.
(1)
I am having a problem porting Config.in in 2.4 to Kconfig in 2.6. I am
not sure of this syntax and the change I am making looking at stuff
already in Kconfig does not work. Here are the lines from the
Config.in of 2.4 that need to be ported:-
###########################################
#My ext3cow support
tristate 'Ext3cow - journalling file system with copy-on-write
support' CONFIG_EXT3COW_FS
define_bool CONFIG_JBD $CONFIG_EXT3COW_FS
###########################################
Please give the exact way that I need to enter this in Kconfig. I have
tried a lot and am hoping I can get a right answer. And the 'help'
field of Kconfig can be any text I want right? In my .config, I will
have a entry like CONFIG_EXT3COW_FS right?

(2)
I am unable to find the following #defines :-
#define FILTER_FS_TYPES 6
#define FILTER_FS_EXT2 0
#define FILTER_FS_EXT3 1
....................
that were earlier in ../include/linux/fsfilter.h in the 2.4 kernel.

Can you please tell me where this info is now? I would appreciate if
you can also tell my what is the purpose of these FILTERS.

---

Clarification of Question by kwer-ga on 06 May 2005 12:48 PDT

I tried:-
config EXT3COW_FS
#My ext3cow support
        tristate "(Harsha)Ext3cow - journalling file system with
 	copy-on-write support"
        help
          The ext3cow file system is a time-shifting file system 
	  implemented with copy-on-write .....

config JBD
	tristate
	depends on EXT3_FS || EXT3COW_FS
	help
	  This is a generic journaling layer for block devices.  It is
	  currently ..........


And this is giving problems.