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drbd: prepare the transition from connector to genetlink

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This adds the new API header and helper files.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Lars Ellenberg 2011-03-07 10:20:08 +01:00 • committed by Philipp Reisner
parent 3cb7a2a90f
commit ec2c35ac1e
4 changed files with 1081 additions and 0 deletions
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55
include/linux/drbd_genl_api.h Normal file
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#ifndef DRBD_GENL_STRUCT_H
#define DRBD_GENL_STRUCT_H
/**
* struct drbd_genlmsghdr - DRBD specific header used in NETLINK_GENERIC requests
* @minor:
* For admin requests (user -> kernel): which minor device to operate on.
* For (unicast) replies or informational (broadcast) messages
* (kernel -> user): which minor device the information is about.
* If we do not operate on minors, but on connections or resources,
* the minor value shall be (~0), and the attribute DRBD_NLA_CFG_CONTEXT
* is used instead.
* @flags: possible operation modifiers (relevant only for user->kernel):
* DRBD_GENL_F_SET_DEFAULTS
* @volume:
* When creating a new minor (adding it to a resource), the resource needs
* to know which volume number within the resource this is supposed to be.
* The volume number corresponds to the same volume number on the remote side,
* whereas the minor number on the remote side may be different
* (union with flags).
* @ret_code: kernel->userland unicast cfg reply return code (union with flags);
*/
struct drbd_genlmsghdr {
__u32 minor;
union {
__u32 flags;
__s32 ret_code;
};
};
/* To be used in drbd_genlmsghdr.flags */
enum {
DRBD_GENL_F_SET_DEFAULTS = 1,
};
enum drbd_state_info_bcast_reason {
SIB_GET_STATUS_REPLY = 1,
SIB_STATE_CHANGE = 2,
SIB_HELPER_PRE = 3,
SIB_HELPER_POST = 4,
SIB_SYNC_PROGRESS = 5,
};
/* hack around predefined gcc/cpp "linux=1",
* we cannot possibly include <1/drbd_genl.h> */
#undef linux
#include <linux/drbd.h>
#define GENL_MAGIC_VERSION API_VERSION
#define GENL_MAGIC_FAMILY drbd
#define GENL_MAGIC_FAMILY_HDRSZ sizeof(struct drbd_genlmsghdr)
#define GENL_MAGIC_INCLUDE_FILE <linux/drbd_genl.h>
#include <linux/genl_magic_struct.h>
#endif