Re: [fuse-devel] [RFC] fuse: Support posix ACLs

[Nikolaus Rath <Nikolaus@rath.org>]

On Jun 30 2016, Seth Forshee <seth.forshee@canonical.com> wrote:
> Yes, I've already written pretty much the same code and am attempting to
> test it.  The problem I'm having is finding a good filesystem to test
> with. fusexmp works but is probably unfair as the underlying filesystem
> is handling the acls and updating the mode. I haven't found any
> filesystem yet that fully supports xattrs but doesn't do something
> special with the posix acl xattrs.
>
> Can anyone suggest a good filesystem for me to test with?

S3QL should do it with a small patch - at the moment it deliberately
returns an error when the kernel tries to acces system.posix_acl*. This
is done specifically so that the kernel doesn't think that ACLs are
supported when they actually aren't (because of the missing
synchronization with the permission bits).

Download from https://bitbucket.org/nikratio/s3ql/ and comment out the
check in src/s3ql/fs.py:getxattr():

        # http://code.google.com/p/s3ql/issues/detail?id=385
        elif name in (b'system.posix_acl_access',
                      b'system.posix_acl_default'):
            raise FUSEError(ACL_ERRNO)



Best,
-Nikolaus

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