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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* stackglue.c
*
* Code which implements an OCFS2 specific interface to underlying
* cluster stacks.
*
* 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.
*/
#include <linux/slab.h>
#include <linux/kmod.h>
/* Needed for AOP_TRUNCATED_PAGE in mlog_errno() */
#include <linux/fs.h>
#include "cluster/masklog.h"
#include "stackglue.h"
struct ocfs2_locking_protocol *stack_glue_lproto;
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)
{
BUG_ON(stack_glue_lproto == NULL);
return o2cb_stack_ops.dlm_lock(conn, mode, lksb, flags,
name, namelen, astarg);
}
int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
union ocfs2_dlm_lksb *lksb,
u32 flags,
void *astarg)
{
BUG_ON(stack_glue_lproto == NULL);
return o2cb_stack_ops.dlm_unlock(conn, lksb, flags, astarg);
}
int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb)
{
return o2cb_stack_ops.lock_status(lksb);
}
/*
* Why don't we cast to ocfs2_meta_lvb? The "clean" answer is that we
* don't cast at the glue level. The real answer is that the header
* ordering is nigh impossible.
*/
void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb)
{
return o2cb_stack_ops.lock_lvb(lksb);
}
void ocfs2_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb)
{
o2cb_stack_ops.dump_lksb(lksb);
}
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 rc = 0;
struct ocfs2_cluster_connection *new_conn;
BUG_ON(group == NULL);
BUG_ON(conn == NULL);
BUG_ON(recovery_handler == NULL);
if (grouplen > GROUP_NAME_MAX) {
rc = -EINVAL;
goto out;
}
new_conn = kzalloc(sizeof(struct ocfs2_cluster_connection),
GFP_KERNEL);
if (!new_conn) {
rc = -ENOMEM;
goto out;
}
memcpy(new_conn->cc_name, group, grouplen);
new_conn->cc_namelen = grouplen;
new_conn->cc_recovery_handler = recovery_handler;
new_conn->cc_recovery_data = recovery_data;
/* Start the new connection at our maximum compatibility level */
new_conn->cc_version = stack_glue_lproto->lp_max_version;
rc = o2cb_stack_ops.connect(new_conn);
if (rc) {
mlog_errno(rc);
goto out_free;
}
*conn = new_conn;
out_free:
if (rc)
kfree(new_conn);
out:
return rc;
}
int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn)
{
int ret;
BUG_ON(conn == NULL);
ret = o2cb_stack_ops.disconnect(conn);
/* XXX Should we free it anyway? */
if (!ret)
kfree(conn);
return ret;
}
void ocfs2_cluster_hangup(const char *group, int grouplen)
{
BUG_ON(group == NULL);
BUG_ON(group[grouplen] != '\0');
o2cb_stack_ops.hangup(group, grouplen);
}
int ocfs2_cluster_this_node(unsigned int *node)
{
return o2cb_stack_ops.this_node(node);
}
void ocfs2_stack_glue_set_locking_protocol(struct ocfs2_locking_protocol *proto)
{
BUG_ON(proto != NULL);
stack_glue_lproto = proto;
}
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