f399002e68
This commit breaks the API again. Move per-volume former syncer options into disk_conf. Move per-connection former syncer options into net_conf. Renamed the remainign sync_conf to res_opts Syncer settings have been changeable at runtime, so we need to prepare for these settings to be runtime-changeable in their new home as well. Introduce new configuration operations, and share the netlink attribute between "attach" (create new disk) and "disk-opts" (change options). Same for "connect" and "net-opts". Some fields cannot be changed at runtime, however. Introduce a new flag GENLA_F_INVARIANT to be able to trigger on that in the generated validation and assignment functions. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
269 lines
7.3 KiB
C
269 lines
7.3 KiB
C
#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
|
|
*/
|
|
|
|
/**
|
|
* GENLA_F_FLAGS - policy type flags to ease compatible ABI evolvement
|
|
*
|
|
* @GENLA_F_REQUIRED: attribute has to be present, or message is considered invalid.
|
|
* Adding new REQUIRED attributes breaks ABI compatibility, so don't do that.
|
|
*
|
|
* @GENLA_F_MANDATORY: if present, receiver _must_ understand it.
|
|
* Without this, unknown attributes (> maxtype) are _silently_ ignored
|
|
* by validate_nla().
|
|
*
|
|
* To be used for API extensions, so older kernel can reject requests for not
|
|
* yet implemented features, if newer userland tries to use them even though
|
|
* the genl_family version clearly indicates they are not available.
|
|
*
|
|
* @GENLA_F_MAY_IGNORE: To clearly document the fact, for good measure.
|
|
* To be used for API extensions for things that have sane defaults,
|
|
* so newer userland can still talk to older kernel, knowing it will
|
|
* silently ignore these attributes if not yet known.
|
|
*
|
|
* NOTE: These flags overload
|
|
* NLA_F_NESTED (1 << 15)
|
|
* NLA_F_NET_BYTEORDER (1 << 14)
|
|
* from linux/netlink.h, which are not useful for validate_nla():
|
|
* NET_BYTEORDER is not used anywhere, and NESTED would be specified by setting
|
|
* .type = NLA_NESTED in the appropriate policy.
|
|
*
|
|
* See also: nla_type()
|
|
*/
|
|
enum {
|
|
GENLA_F_MAY_IGNORE = 0,
|
|
GENLA_F_MANDATORY = 1 << 14,
|
|
GENLA_F_REQUIRED = 1 << 15,
|
|
|
|
/* Below will not be present in the __u16 .nla_type, but can be
|
|
* triggered on in <struct>_to_skb resp. <struct>_from_attrs */
|
|
|
|
/* To exclude "sensitive" information from broadcasts, or on
|
|
* unpriviledged get requests. This is useful because genetlink
|
|
* multicast groups can be listened in on by anyone. */
|
|
GENLA_F_SENSITIVE = 1 << 16,
|
|
|
|
/* INVARIAN options cannot be changed at runtime.
|
|
* Useful to share an attribute policy and struct definition,
|
|
* between some "create" and "change" commands,
|
|
* but disallow certain fields to be changed online.
|
|
*/
|
|
GENLA_F_INVARIANT = 1 << 17,
|
|
};
|
|
|
|
#define __nla_type(x) ((__u16)((__u16)(x) & (__u16)NLA_TYPE_MASK))
|
|
|
|
/* }}}1
|
|
* MAGIC
|
|
* multi-include macro expansion magic starts here
|
|
*/
|
|
|
|
/* MAGIC helpers {{{2 */
|
|
|
|
/* possible field types */
|
|
#define __flg_field(attr_nr, attr_flag, name) \
|
|
__field(attr_nr, attr_flag, name, NLA_FLAG, char, \
|
|
nla_get_flag, __nla_put_flag)
|
|
#define __u8_field(attr_nr, attr_flag, name) \
|
|
__field(attr_nr, attr_flag, name, NLA_U8, unsigned char, \
|
|
nla_get_u8, NLA_PUT_U8)
|
|
#define __u16_field(attr_nr, attr_flag, name) \
|
|
__field(attr_nr, attr_flag, name, NLA_U16, __u16, \
|
|
nla_get_u16, NLA_PUT_U16)
|
|
#define __u32_field(attr_nr, attr_flag, name) \
|
|
__field(attr_nr, attr_flag, name, NLA_U32, __u32, \
|
|
nla_get_u32, NLA_PUT_U32)
|
|
#define __u64_field(attr_nr, attr_flag, name) \
|
|
__field(attr_nr, attr_flag, name, NLA_U64, __u64, \
|
|
nla_get_u64, NLA_PUT_U64)
|
|
#define __str_field(attr_nr, attr_flag, name, maxlen) \
|
|
__array(attr_nr, attr_flag, name, NLA_NUL_STRING, char, maxlen, \
|
|
nla_strlcpy, NLA_PUT)
|
|
#define __bin_field(attr_nr, attr_flag, name, maxlen) \
|
|
__array(attr_nr, attr_flag, name, NLA_BINARY, char, maxlen, \
|
|
nla_memcpy, NLA_PUT)
|
|
|
|
#define __nla_put_flag(skb, attrtype, value) \
|
|
do { \
|
|
if (value) \
|
|
NLA_PUT_FLAG(skb, attrtype); \
|
|
} while (0)
|
|
|
|
#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) \
|
|
T_ ## name = (__u16)(attr_nr | attr_flag),
|
|
|
|
#undef __array
|
|
#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen, __get, __put) \
|
|
T_ ## name = (__u16)(attr_nr | attr_flag),
|
|
|
|
#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
|
|
;
|
|
}
|
|
}
|
|
|
|
#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
|
|
;
|
|
}
|
|
}
|
|
|
|
#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 \
|
|
; \
|
|
} \
|
|
}
|
|
|
|
#undef __field
|
|
#define __field(attr_nr, attr_flag, name, nla_type, type, __get, __put) \
|
|
case attr_nr:
|
|
|
|
#undef __array
|
|
#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen, __get, __put) \
|
|
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) \
|
|
type name;
|
|
|
|
#undef __array
|
|
#define __array(attr_nr, attr_flag, name, nla_type, type, maxlen, __get, __put) \
|
|
type name[maxlen]; \
|
|
__u32 name ## _len;
|
|
|
|
#include GENL_MAGIC_INCLUDE_FILE
|
|
|
|
/* }}}1 */
|
|
#endif /* GENL_MAGIC_STRUCT_H */
|
|
/* vim: set foldmethod=marker nofoldenable : */
|