Re: Filesystem as a module?

[Jan-Benedict Glaw <jbglaw@lug-owl.de>]

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On Fri, 2004-03-12 18:02:57 -0500, Vineet Joglekar <vintya@excite.com>
wrote in message <20040312230257.B06123DE6@xprdmailfe11.nwk.excite.com>:
> Hi all,
> 
> I am trying to add some functionalities to ext2 filesystem, and use it as a module. Till now what I did is:
> 1: Copied the ext2 files and made the approprate changes
> 2: Copied files from usr/src/linux/fs/ directory
> 3: Copied relevant header files in /include/linux directory

Better create another directory below ./linux/fs/ and place your sources
there.

> The module gets compiled properly, but when I try to insert it using insmod, I am getting following errors like:
> 
> my_extv2.o: unresolved symbol generic_file_read_Rsmp_106b3732
> my_extv2.o: unresolved symbol __get_free_pages_Rsmp_4784e424
> my_extv2.o: unresolved symbol try_inc_mod_count_Rsmp_e6105b23
> my_extv2.o: unresolved symbol blk_size_Rsmp_a2e0a082
> my_extv2.o: unresolved symbol pidhash_Rsmp_4439d880
> my_extv2.o: unresolved symbol floppy_eject
> my_extv2.o: unresolved symbol smp_num_siblings

You've mixed up your symbol versioning settings, most probably because
you're not building within the kernel's sources. That should all go away
automatically if you build within the kernel:)

> Whats wrong with my approach or do I need to add / modify few things?

Just copy all the sources back into the kernel tree and you're most
probably done.

MfG, JBG

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