286 lines
7.6 KiB
C
286 lines
7.6 KiB
C
/* 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 */
|