// SPDX-License-Identifier: GPL-2.0
  /*
   *  linux/fs/minix/file.c
   *
   *  Copyright (C) 1991, 1992 Linus Torvalds
   *
   *  minix regular file handling primitives
   */
  
  #include "minix.h"
  
  /*
   * We have mostly NULLs here: the current defaults are OK for
   * the minix filesystem.
   */
  const struct file_operations minix_file_operations = {
  	.llseek		= generic_file_llseek,
  	.read_iter	= generic_file_read_iter,
  	.write_iter	= generic_file_write_iter,
  	.mmap		= generic_file_mmap,
  	.fsync		= generic_file_fsync,
  	.splice_read	= generic_file_splice_read,
  };
  
  static int minix_setattr(struct dentry *dentry, struct iattr *attr)
  {
  	struct inode *inode = d_inode(dentry);
  	int error;
  
  	error = setattr_prepare(dentry, attr);
  	if (error)
  		return error;
  
  	if ((attr->ia_valid & ATTR_SIZE) &&
  	    attr->ia_size != i_size_read(inode)) {
  		error = inode_newsize_ok(inode, attr->ia_size);
  		if (error)
  			return error;
  
  		truncate_setsize(inode, attr->ia_size);
  		minix_truncate(inode);
  	}
  
  	setattr_copy(inode, attr);
  	mark_inode_dirty(inode);
  	return 0;
  }
  
  const struct inode_operations minix_file_inode_operations = {
  	.setattr	= minix_setattr,
  	.getattr	= minix_getattr,
  };