[Linux-cluster] Posix ACL deps for gfs-kernel modules

[Lazar Obradovic]

Hi, 

I've been playing with out-of-tree building of gfs related modules
(actually, creating ebuilds for gfs), and found out one really stupid
thing: 

You cannot successfuly build gfs-kernel modules if you don't have at
least one "regular" filesystem build in kernel with Posix ACL support. 
The thing is that gfs-kernel tree modules expect to have posix_acl*
symbols available from already build kernel. 

Perhaps it's not a "bug" in gfs-kernel after all, since kernel
documentation states:

--- fs/KConfig ---
config FS_POSIX_ACL
# Posix ACL utility routines (for now, only ext2/ext3/jfs/reiserfs)
#
# NOTE: you can implement Posix ACLs without these helpers (XFS does).
#       Never use this symbol for ifdefs.
#
        bool
        depends on EXT2_FS_POSIX_ACL || EXT3_FS_POSIX_ACL ||
JFS_POSIX_ACL || REISERFS_FS_POSIX_ACL
        default y
--- fs/KConfig ---

but, on the other hand, it doesn't put CONFIG_FS_POSIX_ACL in .config,
so fs/Makefile ignores posix_acl.o and xattr.o when compiliing kernel. 

Is this gfs or kernel issue? Can we locally correct this (somehow force
the compilation of fs/posix_acl.o and fs/xattr.o if not available) or do
we have report this to LKML? 

Quick fix would be to compile kernel with EXT3_FS_POSIX_ACL, but i'm not
sure what side-effects would that have on ext3 filesystems.

-- 
Lazar Obradovic, System Engineer
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laza at YU.net
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