/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* stackglue.h
*
* Glue to the underlying cluster stack.
*
* Copyright (C) 2007 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef STACKGLUE_H
#define STACKGLUE_H
#include <linux/types.h>
#include <linux/list.h>
#include <linux/dlmconstants.h>
/*
* dlmconstants.h does not have a LOCAL flag. We hope to remove it
* some day, but right now we need it. Let's fake it. This value is larger
* than any flag in dlmconstants.h.
*/
#define DLM_LKF_LOCAL 0x00100000
/*
* This shadows DLM_LOCKSPACE_LEN in fs/dlm/dlm_internal.h. That probably
* wants to be in a public header.
*/
#define GROUP_NAME_MAX 64
#include "dlm/dlmapi.h"
struct ocfs2_protocol_version {
u8 pv_major;
u8 pv_minor;
};
struct ocfs2_locking_protocol {
struct ocfs2_protocol_version lp_max_version;
void (*lp_lock_ast)(void *astarg);
void (*lp_blocking_ast)(void *astarg, int level);
void (*lp_unlock_ast)(void *astarg, int error);
};
union ocfs2_dlm_lksb {
struct dlm_lockstatus lksb_o2dlm;
};
struct ocfs2_cluster_connection {
char cc_name[GROUP_NAME_MAX];
int cc_namelen;
struct ocfs2_protocol_version cc_version;
void (*cc_recovery_handler)(int node_num, void *recovery_data);
void *cc_recovery_data;
void *cc_lockspace;
void *cc_private;
};
int ocfs2_cluster_connect(const char *group,
int grouplen,
void (*recovery_handler)(int node_num,
void *recovery_data),
void *recovery_data,
struct ocfs2_cluster_connection **conn);
int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn);
void ocfs2_cluster_hangup(const char *group, int grouplen);
int ocfs2_cluster_this_node(unsigned int *node);
int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
int mode,
union ocfs2_dlm_lksb *lksb,
u32 flags,
void *name,
unsigned int namelen,
void *astarg);
int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
union ocfs2_dlm_lksb *lksb,
u32 flags,
void *astarg);
int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb);
void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb);
void ocfs2_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb);
void ocfs2_stack_glue_set_locking_protocol(struct ocfs2_locking_protocol *proto);
#endif /* STACKGLUE_H */
