linux/include/linux/drbd_genl_api.h
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   1#ifndef DRBD_GENL_STRUCT_H
   2#define DRBD_GENL_STRUCT_H
   3
   4/**
   5 * struct drbd_genlmsghdr - DRBD specific header used in NETLINK_GENERIC requests
   6 * @minor:
   7 *     For admin requests (user -> kernel): which minor device to operate on.
   8 *     For (unicast) replies or informational (broadcast) messages
   9 *     (kernel -> user): which minor device the information is about.
  10 *     If we do not operate on minors, but on connections or resources,
  11 *     the minor value shall be (~0), and the attribute DRBD_NLA_CFG_CONTEXT
  12 *     is used instead.
  13 * @flags: possible operation modifiers (relevant only for user->kernel):
  14 *     DRBD_GENL_F_SET_DEFAULTS
  15 * @volume:
  16 *     When creating a new minor (adding it to a resource), the resource needs
  17 *     to know which volume number within the resource this is supposed to be.
  18 *     The volume number corresponds to the same volume number on the remote side,
  19 *     whereas the minor number on the remote side may be different
  20 *     (union with flags).
  21 * @ret_code: kernel->userland unicast cfg reply return code (union with flags);
  22 */
  23struct drbd_genlmsghdr {
  24        __u32 minor;
  25        union {
  26        __u32 flags;
  27        __s32 ret_code;
  28        };
  29};
  30
  31/* To be used in drbd_genlmsghdr.flags */
  32enum {
  33        DRBD_GENL_F_SET_DEFAULTS = 1,
  34};
  35
  36enum drbd_state_info_bcast_reason {
  37        SIB_GET_STATUS_REPLY = 1,
  38        SIB_STATE_CHANGE = 2,
  39        SIB_HELPER_PRE = 3,
  40        SIB_HELPER_POST = 4,
  41        SIB_SYNC_PROGRESS = 5,
  42};
  43
  44/* hack around predefined gcc/cpp "linux=1",
  45 * we cannot possibly include <1/drbd_genl.h> */
  46#undef linux
  47
  48#include <linux/drbd.h>
  49#define GENL_MAGIC_VERSION      API_VERSION
  50#define GENL_MAGIC_FAMILY       drbd
  51#define GENL_MAGIC_FAMILY_HDRSZ sizeof(struct drbd_genlmsghdr)
  52#define GENL_MAGIC_INCLUDE_FILE <linux/drbd_genl.h>
  53#include <linux/genl_magic_struct.h>
  54
  55#endif
  56
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