text: /* SPDX-License-Identifier: GPL-2.0 */
  #ifndef GENL_MAGIC_STRUCT_H
  #define GENL_MAGIC_STRUCT_H
  
  #ifndef GENL_MAGIC_FAMILY
  # error "you need to define GENL_MAGIC_FAMILY before inclusion"
  #endif
  
  #ifndef GENL_MAGIC_VERSION
  # error "you need to define GENL_MAGIC_VERSION before inclusion"
  #endif
  
  #ifndef GENL_MAGIC_INCLUDE_FILE
  # error "you need to define GENL_MAGIC_INCLUDE_FILE before inclusion"
  #endif
  
  #include <linux/genetlink.h>
  #include <linux/types.h>
  
  #define CONCAT__(a,b)	a ## b
  #define CONCAT_(a,b)	CONCAT__(a,b)
  
  extern int CONCAT_(GENL_MAGIC_FAMILY, _genl_register)(void);
  extern void CONCAT_(GENL_MAGIC_FAMILY, _genl_unregister)(void);
  
  /*
   * Extension of genl attribute validation policies			{{{2
   */
  
  /*
   * @DRBD_GENLA_F_MANDATORY: By default, netlink ignores attributes it does not
   * know about.  This flag can be set in nlattr->nla_type to indicate that this
   * attribute must not be ignored.
   *
   * We check and remove this flag in drbd_nla_check_mandatory() before
   * validating the attribute types and lengths via nla_parse_nested().
   */
  #define DRBD_GENLA_F_MANDATORY (1 << 14)
  
  /*
   * Flags specific to drbd and not visible at the netlink layer, used in
   * <struct>_from_attrs and <struct>_to_skb:
   *
   * @DRBD_F_REQUIRED: Attribute is required; a request without this attribute is
   * invalid.
   *
   * @DRBD_F_SENSITIVE: Attribute includes sensitive information and must not be
   * included in unpriviledged get requests or broadcasts.
   *
   * @DRBD_F_INVARIANT: Attribute is set when an object is initially created, but
   * cannot subsequently be changed.
   */
  #define DRBD_F_REQUIRED (1 << 0)
  #define DRBD_F_SENSITIVE (1 << 1)
  #define DRBD_F_INVARIANT (1 << 2)
  
  #define __nla_type(x)	((__u16)((x) & NLA_TYPE_MASK & ~DRBD_GENLA_F_MANDATORY))
  
  /*									}}}1
   * MAGIC
   * multi-include macro expansion magic starts here
   */
  
  /* MAGIC helpers							{{{2 */
  
  static inline int nla_put_u64_0pad(struct sk_buff *skb, int attrtype, u64 value)
  {
  	return nla_put_64bit(skb, attrtype, sizeof(u64), &value, 0);
  }
  
  /* possible field types */
  #define __flg_field(attr_nr, attr_flag, name) \
  	__field(attr_nr, attr_flag, name, NLA_U8, char, \
  			nla_get_u8, nla_put_u8, false)
  #define __u8_field(attr_nr, attr_flag, name)	\
  	__field(attr_nr, attr_flag, name, NLA_U8, unsigned char, \
  			nla_get_u8, nla_put_u8, false)
  #define __u16_field(attr_nr, attr_flag, name)	\
  	__field(attr_nr, attr_flag, name, NLA_U16, __u16, \
  			nla_get_u16, nla_put_u16, false)
  #define __u32_field(attr_nr, attr_flag, name)	\
  	__field(attr_nr, attr_flag, name, NLA_U32, __u32, \
  			nla_get_u32, nla_put_u32, false)
  #define __s32_field(attr_nr, attr_flag, name)	\
  	__field(attr_nr, attr_flag, name, NLA_U32, __s32, \
  			nla_get_u32, nla_put_u32, true)
  #define __u64_field(attr_nr, attr_flag, name)	\
  	__field(attr_nr, attr_flag, name, NLA_U64, __u64, \
  			nla_get_u64, nla_put_u64_0pad, false)
  #define __str_field(attr_nr, attr_flag, name, maxlen) \
  	__array(attr_nr, attr_flag, name, NLA_NUL_STRING, char, maxlen, \
  			nla_strscpy, nla_put, false)
  #define __bin_field(attr_nr, attr_flag, name, maxlen) \
  	__array(attr_nr, attr_flag, name, NLA_BINARY, char, maxlen, \
  			nla_memcpy, nla_put, false)
  
  /* fields with default values */
  #define __flg_field_def(attr_nr, attr_flag, name, default) \
  	__flg_field(attr_nr, attr_flag, name)
  #define __u32_field_def(attr_nr, attr_flag, name, default) \
  	__u32_field(attr_nr, attr_flag, name)
  #define __s32_field_def(attr_nr, attr_flag, name, default) \
  	__s32_field(attr_nr, attr_flag, name)
  #define __str_field_def(attr_nr, attr_flag, name, maxlen) \
  	__str_field(attr_nr, attr_flag, name, maxlen)
  
  #define GENL_op_init(args...)	args
  #define GENL_doit(handler)		\
  	.doit = handler,		\
  	.flags = GENL_ADMIN_PERM,
  #define GENL_dumpit(handler)		\
  	.dumpit = handler,		\
  	.flags = GENL_ADMIN_PERM,
  
  /*									}}}1
   * Magic: define the enum symbols for genl_ops
   * Magic: define the enum symbols for top level attributes
   * Magic: define the enum symbols for nested attributes
   *									{{{2
   */
  
  #undef GENL_struct
  #define GENL_struct(tag_name, tag_number, s_name, s_fields)
  
  #undef GENL_mc_group
  #define GENL_mc_group(group)
  
  #undef GENL_notification
  #define GENL_notification(op_name, op_num, mcast_group, tla_list)	\
  	op_name = op_num,
  
  #undef GENL_op
  #define GENL_op(op_name, op_num, handler, tla_list)			\
  	op_name = op_num,
  
  enum {
  #include GENL_MAGIC_INCLUDE_FILE
  };
  
  #undef GENL_notification
  #define GENL_notification(op_name, op_num, mcast_group, tla_list)
  
  #undef GENL_op
  #define GENL_op(op_name, op_num, handler, attr_list)
  
  #undef GENL_struct
  #define GENL_struct(tag_name, tag_number, s_name, s_fields) \
  		tag_name = tag_number,
  
  enum {
  #include GENL_MAGIC_INCLUDE_FILE
  };
  
  #undef GENL_struct
  #define GENL_struct(tag_name, tag_number, s_name, s_fields)	\
  enum {								\
  	s_fields						\
  };
  
  #undef __field
  #define __field(attr_nr, attr_flag, name, nla_type, type,	\
  		__get, __put, __is_signed)			\
  	T_ ## name = (__u16)(attr_nr | ((attr_flag) & DRBD_GENLA_F_MANDATORY)),
  
  #undef __array
  #define __array(attr_nr, attr_flag, name, nla_type, type,	\
  		maxlen, __get, __put, __is_signed)		\
  	T_ ## name = (__u16)(attr_nr | ((attr_flag) & DRBD_GENLA_F_MANDATORY)),
  
  #include GENL_MAGIC_INCLUDE_FILE
  
  /*									}}}1
   * Magic: compile time assert unique numbers for operations
   * Magic: -"- unique numbers for top level attributes
   * Magic: -"- unique numbers for nested attributes
   *									{{{2
   */
  
  #undef GENL_struct
  #define GENL_struct(tag_name, tag_number, s_name, s_fields)
  
  #undef GENL_op
  #define GENL_op(op_name, op_num, handler, attr_list)	\
  	case op_name:
  
  #undef GENL_notification
  #define GENL_notification(op_name, op_num, mcast_group, tla_list)	\
  	case op_name:
  
  static inline void ct_assert_unique_operations(void)
  {
  	switch (0) {
  #include GENL_MAGIC_INCLUDE_FILE
  	case 0:
  		;
  	}
  }
  
  #undef GENL_op
  #define GENL_op(op_name, op_num, handler, attr_list)
  
  #undef GENL_notification
  #define GENL_notification(op_name, op_num, mcast_group, tla_list)
  
  #undef GENL_struct
  #define GENL_struct(tag_name, tag_number, s_name, s_fields)		\
  		case tag_number:
  
  static inline void ct_assert_unique_top_level_attributes(void)
  {
  	switch (0) {
  #include GENL_MAGIC_INCLUDE_FILE
  	case 0:
  		;
  	}
  }
  
  #undef GENL_struct
  #define GENL_struct(tag_name, tag_number, s_name, s_fields)		\
  static inline void ct_assert_unique_ ## s_name ## _attributes(void)	\
  {									\
  	switch (0) {							\
  	s_fields							\
  	case 0:								\
  			;						\
  	}								\
  }
  
  #undef __field
  #define __field(attr_nr, attr_flag, name, nla_type, type, __get, __put,	\
  		__is_signed)						\
  	case attr_nr:
  
  #undef __array
  #define __array(attr_nr, attr_flag, name, nla_type, type, maxlen,	\
  		__get, __put, __is_signed)				\
  	case attr_nr:
  
  #include GENL_MAGIC_INCLUDE_FILE
  
  /*									}}}1
   * Magic: declare structs
   * struct <name> {
   *	fields
   * };
   *									{{{2
   */
  
  #undef GENL_struct
  #define GENL_struct(tag_name, tag_number, s_name, s_fields)		\
  struct s_name { s_fields };
  
  #undef __field
  #define __field(attr_nr, attr_flag, name, nla_type, type, __get, __put,	\
  		__is_signed)						\
  	type name;
  
  #undef __array
  #define __array(attr_nr, attr_flag, name, nla_type, type, maxlen,	\
  		__get, __put, __is_signed)				\
  	type name[maxlen];	\
  	__u32 name ## _len;
  
  #include GENL_MAGIC_INCLUDE_FILE
  
  #undef GENL_struct
  #define GENL_struct(tag_name, tag_number, s_name, s_fields)		\
  enum {									\
  	s_fields							\
  };
  
  #undef __field
  #define __field(attr_nr, attr_flag, name, nla_type, type, __get, __put,	\
  		is_signed)						\
  	F_ ## name ## _IS_SIGNED = is_signed,
  
  #undef __array
  #define __array(attr_nr, attr_flag, name, nla_type, type, maxlen,	\
  		__get, __put, is_signed)				\
  	F_ ## name ## _IS_SIGNED = is_signed,
  
  #include GENL_MAGIC_INCLUDE_FILE
  
  /* }}}1 */
  #endif /* GENL_MAGIC_STRUCT_H */
  /* vim: set foldmethod=marker nofoldenable : */
  