linux-kernel - [PATCH v4 15/15] fs/fuse/virtio

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Message-Id: <20240903151626.264609-16-aleksandr.mikhalitsyn@canonical.com>
Date: Tue,  3 Sep 2024 17:16:26 +0200
From: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
To: mszeredi@...hat.com
Cc: brauner@...nel.org,
	stgraber@...raber.org,
	linux-fsdevel@...r.kernel.org,
	Seth Forshee <sforshee@...nel.org>,
	Miklos Szeredi <miklos@...redi.hu>,
	Vivek Goyal <vgoyal@...hat.com>,
	German Maglione <gmaglione@...hat.com>,
	Amir Goldstein <amir73il@...il.com>,
	Bernd Schubert <bschubert@....com>,
	Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>,
	Stefan Hajnoczi <stefanha@...hat.com>,
	Eugenio Pérez <eperezma@...hat.com>,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux.dev
Subject: [PATCH v4 15/15] fs/fuse/virtio_fs: allow idmapped mounts

Allow idmapped mounts for virtiofs.
It's absolutely safe as for virtiofs we have the same
feature negotiation mechanism as for classical fuse
filesystems. This does not affect any existing
setups anyhow.

virtiofsd support:
https://gitlab.com/virtio-fs/virtiofsd/-/merge_requests/245

Cc: Christian Brauner <brauner@...nel.org>
Cc: Seth Forshee <sforshee@...nel.org>
Cc: Miklos Szeredi <miklos@...redi.hu>
Cc: Vivek Goyal <vgoyal@...hat.com>
Cc: German Maglione <gmaglione@...hat.com>
Cc: Amir Goldstein <amir73il@...il.com>
Cc: Bernd Schubert <bschubert@....com>
Cc: <linux-fsdevel@...r.kernel.org>
Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@...onical.com>
Reviewed-by: Christian Brauner <brauner@...nel.org>
---
v3:
	- this commit added
---
 fs/fuse/virtio_fs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index dd5260141615..7e5bbaef6f76 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -1628,6 +1628,7 @@ static struct file_system_type virtio_fs_type = {
 	.name		= "virtiofs",
 	.init_fs_context = virtio_fs_init_fs_context,
 	.kill_sb	= virtio_kill_sb,
+	.fs_flags	= FS_ALLOW_IDMAP,
 };
 
 static int virtio_fs_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
-- 
2.34.1