| /* 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 */ |