From f3a09c92018a91ad0981146a4ac59414f814d801 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 23 Dec 2018 18:55:56 -0500
Subject: introduce fs_context methods

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 include/linux/fs.h         |  2 ++
 include/linux/fs_context.h | 13 +++++++++++++
 2 files changed, 15 insertions(+)

(limited to 'include/linux')

diff --git a/include/linux/fs.h b/include/linux/fs.h
index c65d02c5c512..8d578a9e1e8c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -61,6 +61,7 @@ struct workqueue_struct;
 struct iov_iter;
 struct fscrypt_info;
 struct fscrypt_operations;
+struct fs_context;
 
 extern void __init inode_init(void);
 extern void __init inode_init_early(void);
@@ -2173,6 +2174,7 @@ struct file_system_type {
 #define FS_HAS_SUBTYPE		4
 #define FS_USERNS_MOUNT		8	/* Can be mounted by userns root */
 #define FS_RENAME_DOES_D_MOVE	32768	/* FS will handle d_move() during rename() internally. */
+	int (*init_fs_context)(struct fs_context *);
 	struct dentry *(*mount) (struct file_system_type *, int,
 		       const char *, void *);
 	void (*kill_sb) (struct super_block *);
diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h
index 7feb018c7a9e..087c12954360 100644
--- a/include/linux/fs_context.h
+++ b/include/linux/fs_context.h
@@ -20,8 +20,13 @@ struct cred;
 struct dentry;
 struct file_operations;
 struct file_system_type;
+struct mnt_namespace;
 struct net;
+struct pid_namespace;
+struct super_block;
 struct user_namespace;
+struct vfsmount;
+struct path;
 
 enum fs_context_purpose {
 	FS_CONTEXT_FOR_MOUNT,		/* New superblock for explicit mount */
@@ -39,6 +44,7 @@ enum fs_context_purpose {
  * See Documentation/filesystems/mounting.txt
  */
 struct fs_context {
+	const struct fs_context_operations *ops;
 	struct file_system_type	*fs_type;
 	void			*fs_private;	/* The filesystem's context */
 	struct dentry		*root;		/* The root and superblock */
@@ -54,6 +60,13 @@ struct fs_context {
 	bool			need_free:1;	/* Need to call ops->free() */
 };
 
+struct fs_context_operations {
+	void (*free)(struct fs_context *fc);
+	int (*parse_monolithic)(struct fs_context *fc, void *data);
+	int (*get_tree)(struct fs_context *fc);
+	int (*reconfigure)(struct fs_context *fc);
+};
+
 /*
  * fs_context manipulation functions.
  */
-- 
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