Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Greg Kurz <groug@kaod.org>
To:     Miklos Szeredi <miklos@szeredi.hu>
Cc:     linux-kernel@vger.kernel.org, Max Reitz <mreitz@redhat.com>,
        linux-fsdevel@vger.kernel.org, virtio-fs@redhat.com,
        Vivek Goyal <vgoyal@redhat.com>, Greg Kurz <groug@kaod.org>
Subject: [PATCH v2 0/7] fuse: Some fixes for submounts
Date:   Fri,  4 Jun 2021 18:11:49 +0200
Message-Id: <20210604161156.408496-1-groug@kaod.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8BIT
Precedence: bulk

v2:


- add an extra fix (patch 2) : mount is now added to the list before

  unlocking sb->s_umount

- set SB_BORN just before unlocking sb->s_umount, just like it would

  happen when using fc_mount() (Max)

- don't allocate a FUSE context for the submounts (Max)

- introduce a dedicated context ops for submounts

- add a extra cleanup : simplify the code even more with fc_mount()


v1:


While working on adding syncfs() support in FUSE, I've hit some severe

bugs with submounts (a crash and an infinite loop). The fix for the

crash is straightforward (patch 1), but the fix for the infinite loop

is more invasive : as suggested by Miklos, a simple bug fix is applied

first (patch 2) and the final fix (patch 3) is applied on top.


Greg Kurz (7):

  fuse: Fix crash in fuse_dentry_automount() error path

  fuse: Fix crash if superblock of submount gets killed early

  fuse: Fix infinite loop in sget_fc()

  fuse: Add dedicated filesystem context ops for submounts

  fuse: Call vfs_get_tree() for submounts

  fuse: Switch to fc_mount() for submounts

  fuse: Make fuse_fill_super_submount() static


 fs/fuse/dir.c       | 58 ++++++---------------------------------------

 fs/fuse/fuse_i.h    | 14 ++++-------

 fs/fuse/inode.c     | 56 +++++++++++++++++++++++++++++++++++++++++--

 fs/fuse/virtio_fs.c |  3 +++

 4 files changed, 69 insertions(+), 62 deletions(-)


-- 

2.31.1