[Virtio-fs] [RFC PATCH 0/7] Inotify support in FUSE and virtiofs

[Steve French]

On Wed, Dec 1, 2021 at 9:06 AM Vivek Goyal <vgoyal at redhat.com> wrote:
>
> On Wed, Nov 17, 2021 at 08:40:57AM +0200, Amir Goldstein wrote:
> > On Wed, Nov 17, 2021 at 12:12 AM Ioannis Angelakopoulos
> > <iangelak at redhat.com> wrote:
> > >
> > >
> > >
> > > On Tue, Nov 16, 2021 at 12:10 AM Stef Bon <stefbon at gmail.com> wrote:
> > >>
> > >> Hi Ioannis,
> > >>
> > >> I see that you have been working on making fsnotify work on virtiofs.
> > >> Earlier you contacted me since I've written this:
> > >>
> > >> https://github.com/libfuse/libfuse/wiki/Fsnotify-and-FUSE
> > >>

We had a few customer requests recently to fix inotify for network fs
which reminded me of Miklos's earlier patch to fix the VFS layer, but
if changes to extend inotify in userspace were also done it would be
important to tie them in with network/cluster filesystems that expose
change notification over their network API.    Most or all major SMB
servers support change notification today so it is extremely common
over SMB3.1.1 (and earlier dialects as well).    If you have userspace
inotify libraries while we wait for changes to the VFS layer to enable
remote change notification - in the interim you can use an existing
fsspecific ioctl for some filesystems like cifs.ko. See
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/cifs/ioctl.c?id=d26c2ddd33569667e3eeb577c4c1d966ca9192e2