diff mbox series

[RFC,35/68] vfs: Convert xenfs to use the new mount API

Message ID 155373029773.7602.5749182816677575121.stgit@warthog.procyon.org.uk (mailing list archive)
State New, archived
Headers show
Series VFS: Convert a bunch of filesystems to the new mount API | expand

Commit Message

David Howells March 27, 2019, 11:44 p.m. UTC
Convert the xenfs filesystem to the new internal mount API as the old
one will be obsoleted and removed.  This allows greater flexibility in
communication of mount parameters between userspace, the VFS and the
filesystem.

See Documentation/filesystems/mount_api.txt for more information.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
cc: Juergen Gross <jgross@suse.com>
cc: Stefano Stabellini <sstabellini@kernel.org>
cc: xen-devel@lists.xenproject.org
---

 drivers/xen/xenfs/super.c |   21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

Comments

Jürgen Groß April 2, 2019, 7:38 a.m. UTC | #1
On 28/03/2019 00:44, David Howells wrote:
> Convert the xenfs filesystem to the new internal mount API as the old
> one will be obsoleted and removed.  This allows greater flexibility in
> communication of mount parameters between userspace, the VFS and the
> filesystem.
> 
> See Documentation/filesystems/mount_api.txt for more information.
> 
> Signed-off-by: David Howells <dhowells@redhat.com>
> cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> cc: Juergen Gross <jgross@suse.com>
> cc: Stefano Stabellini <sstabellini@kernel.org>
> cc: xen-devel@lists.xenproject.org

Reviewed-by: Juergen Gross <jgross@suse.com>


Juergen
diff mbox series

Patch

diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c
index 71ddfb4cf61c..2e16214e9c7f 100644
--- a/drivers/xen/xenfs/super.c
+++ b/drivers/xen/xenfs/super.c
@@ -13,6 +13,7 @@ 
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/fs.h>
+#include <linux/fs_context.h>
 #include <linux/magic.h>
 
 #include <xen/xen.h>
@@ -42,7 +43,7 @@  static const struct file_operations capabilities_file_ops = {
 	.llseek = default_llseek,
 };
 
-static int xenfs_fill_super(struct super_block *sb, void *data, int silent)
+static int xenfs_fill_super(struct super_block *sb, struct fs_context *fc)
 {
 	static const struct tree_descr xenfs_files[] = {
 		[2] = { "xenbus", &xen_xenbus_fops, S_IRUSR|S_IWUSR },
@@ -67,17 +68,25 @@  static int xenfs_fill_super(struct super_block *sb, void *data, int silent)
 			xen_initial_domain() ? xenfs_init_files : xenfs_files);
 }
 
-static struct dentry *xenfs_mount(struct file_system_type *fs_type,
-				  int flags, const char *dev_name,
-				  void *data)
+static int xenfs_get_tree(struct fs_context *fc)
 {
-	return mount_single(fs_type, flags, data, xenfs_fill_super);
+	return vfs_get_super(fc, vfs_get_single_super, xenfs_fill_super);
+}
+
+static const struct fs_context_operations xenfs_context_ops = {
+	.get_tree	= xenfs_get_tree,
+};
+
+static int xenfs_init_fs_context(struct fs_context *fc)
+{
+	fc->ops = &xenfs_context_ops;
+	return 0;
 }
 
 static struct file_system_type xenfs_type = {
 	.owner =	THIS_MODULE,
 	.name =		"xenfs",
-	.mount =	xenfs_mount,
+	.init_fs_context = xenfs_init_fs_context,
 	.kill_sb =	kill_litter_super,
 };
 MODULE_ALIAS_FS("xenfs");