linux-kernel - [PATCH 01/52] fuse: add skeleton virtio

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Date:   Mon, 10 Dec 2018 12:12:27 -0500
From:   Vivek Goyal <vgoyal@...hat.com>
To:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     vgoyal@...hat.com, miklos@...redi.hu, stefanha@...hat.com,
        dgilbert@...hat.com, sweil@...hat.com, swhiteho@...hat.com
Subject: [PATCH 01/52] fuse: add skeleton virtio_fs.ko module

From: Stefan Hajnoczi <stefanha@...hat.com>

Add a basic file system module for virtio-fs.

Signed-off-by: Stefan Hajnoczi <stefanha@...hat.com>
---
 fs/fuse/Kconfig     | 10 ++++++++++
 fs/fuse/Makefile    |  1 +
 fs/fuse/virtio_fs.c | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 44 insertions(+)
 create mode 100644 fs/fuse/virtio_fs.c

diff --git a/fs/fuse/Kconfig b/fs/fuse/Kconfig
index 76f09ce7e5b2..0b1375126420 100644
--- a/fs/fuse/Kconfig
+++ b/fs/fuse/Kconfig
@@ -26,3 +26,13 @@ config CUSE
 
 	  If you want to develop or use a userspace character device
 	  based on CUSE, answer Y or M.
+
+config VIRTIO_FS
+	tristate "Virtio Filesystem"
+	depends on FUSE_FS
+	help
+	  The Virtio Filesystem allows guests to mount file systems from the
+          host.
+
+	  If you want to share files between guests or with the host, answer Y
+          or M.
diff --git a/fs/fuse/Makefile b/fs/fuse/Makefile
index f7b807bc1027..47b78fac5809 100644
--- a/fs/fuse/Makefile
+++ b/fs/fuse/Makefile
@@ -4,5 +4,6 @@
 
 obj-$(CONFIG_FUSE_FS) += fuse.o
 obj-$(CONFIG_CUSE) += cuse.o
+obj-$(CONFIG_VIRTIO_FS) += virtio_fs.o
 
 fuse-objs := dev.o dir.o file.o inode.o control.o xattr.o acl.o readdir.o
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
new file mode 100644
index 000000000000..6b7d3973bd85
--- /dev/null
+++ b/fs/fuse/virtio_fs.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * virtio-fs: Virtio Filesystem
+ * Copyright (C) 2018 Red Hat, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+
+MODULE_AUTHOR("Stefan Hajnoczi <stefanha@...hat.com>");
+MODULE_DESCRIPTION("Virtio Filesystem");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_FS(KBUILD_MODNAME);
+
+static struct file_system_type virtio_fs_type = {
+	.owner		= THIS_MODULE,
+	.name		= KBUILD_MODNAME,
+	.mount		= NULL,
+	.kill_sb	= NULL,
+};
+
+static int __init virtio_fs_init(void)
+{
+	return register_filesystem(&virtio_fs_type);
+}
+
+static void __exit virtio_fs_exit(void)
+{
+	unregister_filesystem(&virtio_fs_type);
+}
+
+module_init(virtio_fs_init);
+module_exit(virtio_fs_exit);
-- 
2.13.6