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ocfs2 asks the cluster stack for the local node's node number for two reasons; to fill the slot map and to print it. While the slot map isn't necessary for userspace cluster stacks, the printing is very nice for debugging. Thus we add ocfs2_cluster_this_node() as a generic API to get this value. It is anticipated that the slot map will not be used under a userspace cluster stack, so validity checks of the node num only need to exist in the slot map code. Otherwise, it just gets used and printed as an opaque value. [ Fixed up some "int" versus "unsigned int" issues and made osb->node_num truly opaque. --Mark ] Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* stackglue.h
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*
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* Glue to the underlying cluster stack.
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*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#ifndef STACKGLUE_H
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#define STACKGLUE_H
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/dlmconstants.h>
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/*
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* dlmconstants.h does not have a LOCAL flag. We hope to remove it
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* some day, but right now we need it. Let's fake it. This value is larger
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* than any flag in dlmconstants.h.
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*/
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#define DLM_LKF_LOCAL 0x00100000
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/*
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* This shadows DLM_LOCKSPACE_LEN in fs/dlm/dlm_internal.h. That probably
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* wants to be in a public header.
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*/
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#define GROUP_NAME_MAX 64
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#include "dlm/dlmapi.h"
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struct ocfs2_protocol_version {
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u8 pv_major;
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u8 pv_minor;
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};
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struct ocfs2_locking_protocol {
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struct ocfs2_protocol_version lp_max_version;
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void (*lp_lock_ast)(void *astarg);
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void (*lp_blocking_ast)(void *astarg, int level);
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void (*lp_unlock_ast)(void *astarg, int error);
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};
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union ocfs2_dlm_lksb {
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struct dlm_lockstatus lksb_o2dlm;
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};
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struct ocfs2_cluster_connection {
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char cc_name[GROUP_NAME_MAX];
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int cc_namelen;
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struct ocfs2_protocol_version cc_version;
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void (*cc_recovery_handler)(int node_num, void *recovery_data);
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void *cc_recovery_data;
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void *cc_lockspace;
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void *cc_private;
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};
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int ocfs2_cluster_connect(const char *group,
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int grouplen,
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void (*recovery_handler)(int node_num,
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void *recovery_data),
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void *recovery_data,
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struct ocfs2_cluster_connection **conn);
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int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn);
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int ocfs2_cluster_this_node(unsigned int *node);
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int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
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int mode,
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union ocfs2_dlm_lksb *lksb,
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u32 flags,
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void *name,
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unsigned int namelen,
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void *astarg);
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int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
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union ocfs2_dlm_lksb *lksb,
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u32 flags,
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void *astarg);
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int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb);
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void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb);
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void o2cb_get_stack(struct ocfs2_locking_protocol *proto);
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void o2cb_put_stack(void);
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#endif /* STACKGLUE_H */
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