Re: Unionfs

[Wolfgang Jaehrling]

On Sat, Dec 07, 2002 at 07:06:09PM +0100, Moritz Schulte wrote:
> Have fun/Happy hacking.

I was just playing around with it a bit and glancing over the code;
when compiling, I got the messages:

gcc -o unionfs main.o node.o lnode.o ulfs.o options.o \
  ncache.o netfs.o lib.o -lnetfs -lfshelp -liohelp -lthreads -lports -lihash 
-lshouldbeinlibc
/usr/bin/ld: netfs.o(.debug_info+0x6399): unresolvable relocation against 
symbol `_netfs_translator_callback1'
/usr/bin/ld: netfs.o(.debug_info+0x63ac): unresolvable relocation against 
symbol `_netfs_translator_callback2'

However, it did work nevertheless (i.e. the unionfs binary was created
and could be started).

I noticed that lnode_ref_remove() and lnode_uninstall() recursively
call each other, where lnode_uninstall() calls lnode_ref_remove() on
node->dir, which should be locked; I could not find anything that
indicates that it will be.

Also, I find it a bit unfortunate that a simple `ls' triggers this
already:

wj@hurd:~/unionfs$ settrans -ac foo unionfs .. /
wj@hurd:~/unionfs$ ls foo/unionfs/
ls: foo/unionfs/foo: Too many levels of symbolic links

And of course, I just had to try compiling Unionfs inside of a
Unionfs. :-) The result was:

wj@hurd:~/unionfs/foo/unionfs$ make
make: getcwd: : No such file or directory
gcc -Wall -g -D_FILE_OFFSET_BITS=64 -std=gnu99 -DDEBUG -c main.c
Assembler messages:
FATAL: can't create main.o: Invalid argument
make: *** [main.o] Error 1

More feedback coming soon.

Cheers,
GNU/Wolfgang