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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _WRSM_SESS_H
#define _WRSM_SESS_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/wrsm_transport.h>
/*
* Type Declarations
*/
typedef enum {
SESSION_UP,
SESSION_DOWN
} wrsm_sess_state;
/*
* Definition of the user's callback function.
*
* The boolean return value should be set to true if teardown is complete,
* or false if there are still references to this node from this subsystem.
* If false was returned, the client should eventually call
* wrsm_sess_unreferenced() to indicate when teardown is finally complete.
*/
typedef boolean_t (*wrsm_sess_func_t)(wrsm_network_t *, cnodeid_t,
wrsm_sess_state);
/*
* Config functions, should be called by transport.
*/
/* Init function. */
void wrsm_sess_init(wrsm_network_t *);
/* Fini function. */
void wrsm_sess_fini(wrsm_network_t *);
/* Informs session that a new cnode is reachable */
void wrsm_sess_reachable(wrsm_network_t *, cnodeid_t);
/* Informs session that a cnode is no longer reachable */
void wrsm_sess_unreachable(wrsm_network_t *, cnodeid_t);
/* Establishes a session with a remote cnode, if enabled. */
wrsm_sessionid_t wrsm_sess_establish(wrsm_network_t *, cnodeid_t);
/* Asynchronously tears down a session to a cnode. */
void wrsm_sess_teardown(wrsm_network_t *, cnodeid_t);
/* Returns the current session. */
wrsm_sessionid_t wrsm_sess_get(wrsm_network_t *, cnodeid_t);
/*
* Functions for client use.
*/
/* Allows user to register for callbacks. */
void wrsm_sess_register(wrsm_network_t *, wrsm_sess_func_t);
/* Removes a user callback registration. */
void wrsm_sess_unregister(wrsm_network_t *, wrsm_sess_func_t);
/*
* Notify session layer of final dereference of node,
* completing earlier session down callback.
*/
void wrsm_sess_unreferenced(wrsm_network_t *net, cnodeid_t cnode);
/*
* Functions for use by some topology management entitiy.
*/
/* Enables communication with a cnode. */
void wrsm_sess_enable(wrsm_network_t *, cnodeid_t);
/* Disables communication with a cnode. May cause a teardown. */
int wrsm_sess_disable(wrsm_network_t *, cnodeid_t);
/* Returns a cnode bitmask indicating which cnodes have valid sessions */
void wrsm_sess_get_cnodes(wrsm_network_t *, cnode_bitmask_t *);
/*
* call to initiate an immediate session establish/teardown
*/
void wrsm_sess_establish_immediate(wrsm_network_t *net, cnodeid_t cnodeid);
void wrsm_sess_teardown_immediate(wrsm_network_t *net, cnodeid_t cnodeid);
/* Does write/read to remote node */
int wrsm_sess_touch_node(wrsm_network_t *net, cnodeid_t cnodeid,
uint32_t stripes);
#ifdef __cplusplus
}
#endif
#endif /* _WRSM_SESS_H */
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