On Mon, Oct 05, 2015 at 08:45:40PM +0200, Andreas Gruenbacher wrote: > On Sun, Oct 4, 2015 at 8:23 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > On Mon, Sep 28, 2015 at 12:08:51AM +0200, Andreas Gruenbacher wrote: > >> Hello, > >> > >> here's another update of the richacl patch queue. At this stage, I would > >> like to ask for final feedback so that the core and ext4 code (patches > >> 1-19) can be merged in the 4.4 merge window. The nfsd and nfs code should > >> then go through the respective maintainer trees. > > > > Now way in this form even if everyone agrees we should have these > > bastard ACLs. I certainly disagree. > > Well, thanks for having a look at the patches. > > > Ayway, back to the VFS <-> FS interface. You still require tons of > > boilderplate code in the filesystem which isn't required and we got rid > > of for Posix ACLs. The filesystem should not look at the userspace > > xattr format, please follow a model similar to ->get_acl and ->set_acl > > for Posix ACLs. > > I will repost a version that has this cleaned up. > > > After that the wire up should be so trivial that you can wire up btrfs, > > xfs and f2fs as well, which is important to make the feature mergeable. > > Why would the patch queue become more mergeable by having support for > more filesystems in it? The filesystem specific code really isn't all > that interesting. The hardest part for the filesystem support is the on-disk feature flag that needs to be set. The kernel part of that is easy, but it's an on-disk format change and so there's also all the userspace side for mkfs, fsck, debug tools, etc, that also need to be able to parse and understand it. So while the xattr code can be made much more generic, there's a bunch of filesystem specific code that needs to go into multiple different repositories and userspace packages for this. Andreas, I also can't remember if any xfstests have been written for these ACLs? That would certainly help make sure all these filesystems have equivalent behaviour... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
