97 static void detach_mnt(struct vfsmount *mnt, struct nameidata *old_nd)  in detach_mnt()  argument
99 	old_nd->dentry = mnt->mnt_mountpoint;  in detach_mnt()
100 	old_nd->mnt = mnt->mnt_parent;  in detach_mnt()
105 	old_nd->dentry->d_mounted--;  in detach_mnt()
279 			struct nameidata old_nd;  in umount_tree()  local
280 			detach_mnt(mnt, &old_nd);  in umount_tree()
282 			path_release(&old_nd);  in umount_tree()
489 	struct nameidata old_nd;  in do_loopback()  local
496 	err = path_lookup(old_name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &old_nd);  in do_loopback()
502 	if (check_mnt(nd->mnt) && (!recurse || check_mnt(old_nd.mnt))) {  in do_loopback()
505 			mnt = copy_tree(old_nd.mnt, old_nd.dentry);  in do_loopback()
507 			mnt = clone_mnt(old_nd.mnt, old_nd.dentry);  in do_loopback()
521 	path_release(&old_nd);  in do_loopback()
555 	struct nameidata old_nd, parent_nd;  in do_move_mount()  local
562 	err = path_lookup(old_name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &old_nd);  in do_move_mount()
570 	if (!check_mnt(nd->mnt) || !check_mnt(old_nd.mnt))  in do_move_mount()
583 	if (old_nd.dentry != old_nd.mnt->mnt_root)  in do_move_mount()
586 	if (old_nd.mnt == old_nd.mnt->mnt_parent)  in do_move_mount()
590 	      S_ISDIR(old_nd.dentry->d_inode->i_mode))  in do_move_mount()
595 		if (p == old_nd.mnt)  in do_move_mount()
599 	detach_mnt(old_nd.mnt, &parent_nd);  in do_move_mount()
600 	attach_mnt(old_nd.mnt, nd);  in do_move_mount()
609 	path_release(&old_nd);  in do_move_mount()
870 static void chroot_fs_refs(struct nameidata *old_nd, struct nameidata *new_nd)  in chroot_fs_refs()  argument
882 			if (fs->root==old_nd->dentry&&fs->rootmnt==old_nd->mnt)  in chroot_fs_refs()
884 			if (fs->pwd==old_nd->dentry&&fs->pwdmnt==old_nd->mnt)  in chroot_fs_refs()
909 	struct nameidata new_nd, old_nd, parent_nd, root_parent, user_nd;  in sys_pivot_root()  local
924 	error = __user_walk(put_old, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &old_nd);  in sys_pivot_root()
933 	down(&old_nd.dentry->d_inode->i_zombie);  in sys_pivot_root()
942 	if (d_unhashed(old_nd.dentry) && !IS_ROOT(old_nd.dentry))  in sys_pivot_root()
945 	if (new_nd.mnt == user_nd.mnt || old_nd.mnt == user_nd.mnt)  in sys_pivot_root()
952 	tmp = old_nd.mnt; /* make sure we can reach put_old from new_root */  in sys_pivot_root()
964 	} else if (!is_subdir(old_nd.dentry, new_nd.dentry))  in sys_pivot_root()
968 	attach_mnt(user_nd.mnt, &old_nd);  in sys_pivot_root()
976 	up(&old_nd.dentry->d_inode->i_zombie);  in sys_pivot_root()
979 	path_release(&old_nd);  in sys_pivot_root()