tree 8c5fdf14ec4c6c089c70edd9bfa1738dfd12cd1d
parent fc17d7519e8e692ad270a7b73cdd6e6740c54493
author Miklos Szeredi <mszeredi@redhat.com> 1532614391 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1536132398 +0200

fuse: umount should wait for all requests

commit b8f95e5d13f5f0191dcb4b9113113d241636e7cb upstream.

fuse_abort_conn() does not guarantee that all async requests have actually
finished aborting (i.e. their ->end() function is called).  This could
actually result in still used inodes after umount.

Add a helper to wait until all requests are fully done.  This is done by
looking at the "num_waiting" counter.  When this counter drops to zero, we
can be sure that no more requests are outstanding.

Fixes: 0d8e84b0432b ("fuse: simplify request abort")
Cc: <stable@vger.kernel.org> # v4.2
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>