[0/4] ovl: allow virtiofs as upper

Message

Miklos Szeredi Jan. 31, 2020, 11:50 a.m. UTC

The purpose of this mini-series is to allow virtiofs as upper layer of
overlayfs.

Applies on top of #overlayfs-next (commit 1a980b8cbf00 ("ovl: add splice
file read write helper")).

Git tree is:

git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git#ovl-remote-upper

Thanks,
Miklos

---
Miklos Szeredi (4):
  ovl: restructure dentry revalidation
  ovl: separate detection of remote upper layer from stacked overlay
  ovl: decide if revalidate needed on a per-dentry bases
  ovl: alllow remote upper

 fs/overlayfs/dir.c       |  3 ++
 fs/overlayfs/export.c    |  2 +
 fs/overlayfs/namei.c     |  5 ++-
 fs/overlayfs/overlayfs.h |  3 +-
 fs/overlayfs/super.c     | 90 +++++++++++++++++++---------------------
 fs/overlayfs/util.c      | 18 ++++++--
 6 files changed, 68 insertions(+), 53 deletions(-)