include/linux/drbd_genl_api.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef DRBD_GENL_STRUCT_H
   3 #define DRBD_GENL_STRUCT_H
   4
   5 /**
   6  * struct drbd_genlmsghdr - DRBD specific header used in NETLINK_GENERIC requests
   7  * @minor:
   8  *     For admin requests (user -> kernel): which minor device to operate on.
   9  *     For (unicast) replies or informational (broadcast) messages
  10  *     (kernel -> user): which minor device the information is about.
  11  *     If we do not operate on minors, but on connections or resources,
  12  *     the minor value shall be (~0), and the attribute DRBD_NLA_CFG_CONTEXT
  13  *     is used instead.
  14  * @flags: possible operation modifiers (relevant only for user->kernel):
  15  *     DRBD_GENL_F_SET_DEFAULTS
  16  * @volume:
  17  *     When creating a new minor (adding it to a resource), the resource needs
  18  *     to know which volume number within the resource this is supposed to be.
  19  *     The volume number corresponds to the same volume number on the remote side,
  20  *     whereas the minor number on the remote side may be different
  21  *     (union with flags).
  22  * @ret_code: kernel->userland unicast cfg reply return code (union with flags);
  23  */
  24 struct drbd_genlmsghdr {
  25         __u32 minor;
  26         union {
  27         __u32 flags;
  28         __s32 ret_code;
  29         };
  30 };
  31
  32 /* To be used in drbd_genlmsghdr.flags */
  33 enum {
  34         DRBD_GENL_F_SET_DEFAULTS = 1,
  35 };
  36
  37 enum drbd_state_info_bcast_reason {
  38         SIB_GET_STATUS_REPLY = 1,
  39         SIB_STATE_CHANGE = 2,
  40         SIB_HELPER_PRE = 3,
  41         SIB_HELPER_POST = 4,
  42         SIB_SYNC_PROGRESS = 5,
  43 };
  44
  45 /* hack around predefined gcc/cpp "linux=1",
  46  * we cannot possibly include <1/drbd_genl.h> */
  47 #undef linux
  48
  49 #include <linux/drbd.h>
  50 #define GENL_MAGIC_VERSION      API_VERSION
  51 #define GENL_MAGIC_FAMILY       drbd
  52 #define GENL_MAGIC_FAMILY_HDRSZ sizeof(struct drbd_genlmsghdr)
  53 #define GENL_MAGIC_INCLUDE_FILE <linux/drbd_genl.h>
  54 #include <linux/genl_magic_struct.h>
  55
  56 #endif