[PATCH 5.18 0905/1095] fuse: Remove the control interface for virtio-fs

Greg Kroah-Hartman
2022-08-15T22:50:07Z

From: Xie Yongji <xieyongji@bytedance.com>

[ Upstream commit c64797809a64c73497082aa05e401a062ec1af34 ]

The commit 15c8e72e88e0 ("fuse: allow skipping control interface and forced
unmount") tries to remove the control interface for virtio-fs since it does
not support aborting requests which are being processed. But it doesn't
work now.

This patch fixes it by skipping creating the control interface if
fuse_conn->no_control is set.

Fixes: 15c8e72e88e0 ("fuse: allow skipping control interface and forced unmount")
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/fuse/control.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 7cede9a3bc96..247ef4f76761 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -258,7 +258,7 @@ int fuse_ctl_add_conn(struct fuse_conn *fc)
struct dentry *parent;
char name[32];

- if (!fuse_control_sb)
+ if (!fuse_control_sb || fc->no_control)
return 0;

parent = fuse_control_sb->s_root;
@@ -296,7 +296,7 @@ void fuse_ctl_remove_conn(struct fuse_conn *fc)
{
int i;

- if (!fuse_control_sb)
+ if (!fuse_control_sb || fc->no_control)
return;

for (i = fc->ctl_ndents - 1; i >= 0; i--) {
--
2.35.1