include/linux/drbd_genl_api.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef DRBD_GENL_STRUCT_H
0003 #define DRBD_GENL_STRUCT_H
0004
0005 /**
0006  * struct drbd_genlmsghdr - DRBD specific header used in NETLINK_GENERIC requests
0007  * @minor:
0008  *     For admin requests (user -> kernel): which minor device to operate on.
0009  *     For (unicast) replies or informational (broadcast) messages
0010  *     (kernel -> user): which minor device the information is about.
0011  *     If we do not operate on minors, but on connections or resources,
0012  *     the minor value shall be (~0), and the attribute DRBD_NLA_CFG_CONTEXT
0013  *     is used instead.
0014  * @flags: possible operation modifiers (relevant only for user->kernel):
0015  *     DRBD_GENL_F_SET_DEFAULTS
0016  * @volume:
0017  *     When creating a new minor (adding it to a resource), the resource needs
0018  *     to know which volume number within the resource this is supposed to be.
0019  *     The volume number corresponds to the same volume number on the remote side,
0020  *     whereas the minor number on the remote side may be different
0021  *     (union with flags).
0022  * @ret_code: kernel->userland unicast cfg reply return code (union with flags);
0023  */
0024 struct drbd_genlmsghdr {
0025     __u32 minor;
0026     union {
0027     __u32 flags;
0028     __s32 ret_code;
0029     };
0030 };
0031
0032 /* To be used in drbd_genlmsghdr.flags */
0033 enum {
0034     DRBD_GENL_F_SET_DEFAULTS = 1,
0035 };
0036
0037 enum drbd_state_info_bcast_reason {
0038     SIB_GET_STATUS_REPLY = 1,
0039     SIB_STATE_CHANGE = 2,
0040     SIB_HELPER_PRE = 3,
0041     SIB_HELPER_POST = 4,
0042     SIB_SYNC_PROGRESS = 5,
0043 };
0044
0045 /* hack around predefined gcc/cpp "linux=1",
0046  * we cannot possibly include <1/drbd_genl.h> */
0047 #undef linux
0048
0049 #include <linux/drbd.h>
0050 #define GENL_MAGIC_VERSION  API_VERSION
0051 #define GENL_MAGIC_FAMILY   drbd
0052 #define GENL_MAGIC_FAMILY_HDRSZ sizeof(struct drbd_genlmsghdr)
0053 #define GENL_MAGIC_INCLUDE_FILE <linux/drbd_genl.h>
0054 #include <linux/genl_magic_struct.h>
0055
0056 #endif