#include <linux/module.h>#include <linux/fs.h>#include <linux/fs_stack.h> /* does _NOT_ require i_mutex to be held. * * This function cannot be inlined since i_size_{read,write} is rather * heavy-weight on 32-bit systems */void fsstack_copy_inode_size(struct inode *dst, const struct inode *src){	i_size_write(dst, i_size_read((struct inode *)src));	dst->i_blocks = src->i_blocks;}EXPORT_SYMBOL_GPL(fsstack_copy_inode_size); /* copy all attributes; get_nlinks is optional way to override the i_nlink * copying */void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,				int (*get_nlinks)(struct inode *)){	dest->i_mode = src->i_mode;	dest->i_uid = src->i_uid;	dest->i_gid = src->i_gid;	dest->i_rdev = src->i_rdev;	dest->i_atime = src->i_atime;	dest->i_mtime = src->i_mtime;	dest->i_ctime = src->i_ctime;	dest->i_blkbits = src->i_blkbits;	dest->i_flags = src->i_flags; 	/*	 * Update the nlinks AFTER updating the above fields, because the	 * get_links callback may depend on them.	 */	if (!get_nlinks)		dest->i_nlink = src->i_nlink;	else		dest->i_nlink = (*get_nlinks)(dest);}EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);