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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/mount.h
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@@ -22,6 +22,7 @@
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 struct vfsmount;
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 struct dentry;
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 struct mnt_namespace;
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+struct fs_context;
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 #define MNT_NOSUID	0x01
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 #define MNT_NODEV	0x02
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@@ -30,6 +31,7 @@
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 #define MNT_NODIRATIME	0x10
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 #define MNT_RELATIME	0x20
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 #define MNT_READONLY	0x40	/* does the user want this to be r/o? */
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+#define MNT_NOSYMFOLLOW	0x80
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 #define MNT_SHRINKABLE	0x100
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 #define MNT_WRITE_HOLD	0x200
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@@ -46,11 +48,12 @@
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 #define MNT_SHARED_MASK	(MNT_UNBINDABLE)
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 #define MNT_USER_SETTABLE_MASK  (MNT_NOSUID | MNT_NODEV | MNT_NOEXEC \
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 				 | MNT_NOATIME | MNT_NODIRATIME | MNT_RELATIME \
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-				 | MNT_READONLY)
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+				 | MNT_READONLY | MNT_NOSYMFOLLOW)
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 #define MNT_ATIME_MASK (MNT_NOATIME | MNT_NODIRATIME | MNT_RELATIME )
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 #define MNT_INTERNAL_FLAGS (MNT_SHARED | MNT_WRITE_HOLD | MNT_INTERNAL | \
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-			    MNT_DOOMED | MNT_SYNC_UMOUNT | MNT_MARKED)
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+			    MNT_DOOMED | MNT_SYNC_UMOUNT | MNT_MARKED | \
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+			    MNT_CURSOR)
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 #define MNT_INTERNAL	0x4000
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@@ -64,16 +67,17 @@
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 #define MNT_SYNC_UMOUNT		0x2000000
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 #define MNT_MARKED		0x4000000
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 #define MNT_UMOUNT		0x8000000
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+#define MNT_CURSOR		0x10000000
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 struct vfsmount {
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 	struct dentry *mnt_root;	/* root of the mounted tree */
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 	struct super_block *mnt_sb;	/* pointer to superblock */
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 	int mnt_flags;
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+
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 	ANDROID_KABI_RESERVE(1);
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 	ANDROID_KABI_RESERVE(2);
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 	ANDROID_KABI_RESERVE(3);
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 	ANDROID_KABI_RESERVE(4);
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-	void *data;
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 } __randomize_layout;
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 struct file; /* forward dec */
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@@ -87,7 +91,7 @@
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 extern void mntput(struct vfsmount *mnt);
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 extern struct vfsmount *mntget(struct vfsmount *mnt);
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 extern struct vfsmount *mnt_clone_internal(const struct path *path);
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-extern int __mnt_is_readonly(struct vfsmount *mnt);
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+extern bool __mnt_is_readonly(struct vfsmount *mnt);
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 extern bool mnt_may_suid(struct vfsmount *mnt);
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 struct path;
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@@ -96,6 +100,8 @@
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 extern void __mnt_drop_write(struct vfsmount *);
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 struct file_system_type;
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+extern struct vfsmount *fc_mount(struct fs_context *fc);
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+extern struct vfsmount *vfs_create_mount(struct fs_context *fc);
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 extern struct vfsmount *vfs_kern_mount(struct file_system_type *type,
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 				      int flags, const char *name,
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 				      void *data);
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@@ -112,4 +118,6 @@
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 extern bool path_is_mountpoint(const struct path *path);
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+extern void kern_unmount_array(struct vfsmount *mnt[], unsigned int num);
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+
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 #endif /* _LINUX_MOUNT_H */