linux-kernel - Re: [PATCH v7 5/7] fuse: Simplfiy the posix acl handling logic.

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Date:   Tue, 27 Feb 2018 10:00:25 +0100
From:   Miklos Szeredi <mszeredi@...hat.com>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Linux Containers <containers@...ts.linux-foundation.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Alban Crequy <alban@...volk.io>,
        Seth Forshee <seth.forshee@...onical.com>,
        Sargun Dhillon <sargun@...gun.me>,
        Dongsu Park <dongsu@...volk.io>,
        "Serge E. Hallyn" <serge@...lyn.com>
Subject: Re: [PATCH v7 5/7] fuse: Simplfiy the posix acl handling logic.

On Tue, Feb 27, 2018 at 12:53 AM, Eric W. Biederman
<ebiederm@...ssion.com> wrote:
> Rename the fuse connection flag posix_acl to cached_posix_acl as that
> is what it actually means.  That fuse will cache and operate on the
> cached value of the posix acl.
>
> When fc->cached_posix_acl is not set, set ACL_DONT_CACHE on the inode
> so that get_acl and friends won't cache the acl values even if they
> are called.
>
> Replace forget_all_cached_acls with fuse_forget_cached_acls.  This
> wrapper only takes effect when cached_posix_acl is true to prevent
> losing the nocache or noxattr status in when posix acls are not
> cached.

Shouldn't forget_cached_acl() be taught about ACL_DONT_CACHE?  I think
it makes sense to generally not clear ACL_DONT_CACHE, since it's not
an actual acl value that needs forgetting.

Thanks,
Miklos