include/linux/drbd_genl_api.h

   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  */
  23 struct 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 */
  32 enum {
  33         DRBD_GENL_F_SET_DEFAULTS = 1,
  34 };
  35
  36 enum 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