/*
   * linux/fs/hfsplus/xattr_trusted.c
   *
   * Vyacheslav Dubeyko <slava@dubeyko.com>
   *
   * Handler for storing security labels as extended attributes.
   */
  
  #include <linux/security.h>

  #include <linux/nls.h>

  #include "hfsplus_fs.h"
  #include "xattr.h"

  #include "acl.h"

  static int hfsplus_security_getxattr(const struct xattr_handler *handler,

  				     struct dentry *unused, struct inode *inode,
  				     const char *name, void *buffer, size_t size)

  {

  	return hfsplus_getxattr(inode, name, buffer, size,

  				XATTR_SECURITY_PREFIX,
  				XATTR_SECURITY_PREFIX_LEN);

  }

  static int hfsplus_security_setxattr(const struct xattr_handler *handler,

  				     struct dentry *unused, struct inode *inode,
  				     const char *name, const void *buffer,
  				     size_t size, int flags)

  {

  	return hfsplus_setxattr(inode, name, buffer, size, flags,

  				XATTR_SECURITY_PREFIX,
  				XATTR_SECURITY_PREFIX_LEN);

  }

  static int hfsplus_initxattrs(struct inode *inode,
  				const struct xattr *xattr_array,
  				void *fs_info)
  {
  	const struct xattr *xattr;

  	char *xattr_name;

  	int err = 0;

  	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
  		GFP_KERNEL);
  	if (!xattr_name)
  		return -ENOMEM;

  	for (xattr = xattr_array; xattr->name != NULL; xattr++) {

  		if (!strcmp(xattr->name, ""))

  			continue;

  		strcpy(xattr_name, XATTR_SECURITY_PREFIX);
  		strcpy(xattr_name +
  			XATTR_SECURITY_PREFIX_LEN, xattr->name);
  		memset(xattr_name +

  			XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);

  
  		err = __hfsplus_setxattr(inode, xattr_name,
  					xattr->value, xattr->value_len, 0);
  		if (err)
  			break;
  	}

  	kfree(xattr_name);

  	return err;
  }
  
  int hfsplus_init_security(struct inode *inode, struct inode *dir,
  				const struct qstr *qstr)
  {
  	return security_inode_init_security(inode, dir, qstr,
  					&hfsplus_initxattrs, NULL);
  }

  int hfsplus_init_inode_security(struct inode *inode,
  						struct inode *dir,
  						const struct qstr *qstr)
  {
  	int err;
  
  	err = hfsplus_init_posix_acl(inode, dir);
  	if (!err)
  		err = hfsplus_init_security(inode, dir, qstr);
  	return err;
  }

  const struct xattr_handler hfsplus_xattr_security_handler = {
  	.prefix	= XATTR_SECURITY_PREFIX,

  	.get	= hfsplus_security_getxattr,
  	.set	= hfsplus_security_setxattr,
  };