[linux-block.git] / fs / dlm / lowcomms.h

/* SPDX-License-Identifier: GPL-2.0-only */
/******************************************************************************
*******************************************************************************
**
**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
**  Copyright (C) 2004-2009 Red Hat, Inc.  All rights reserved.
**
**
*******************************************************************************
******************************************************************************/

#ifndef __LOWCOMMS_DOT_H__
#define __LOWCOMMS_DOT_H__

#include "dlm_internal.h"

#define DLM_MIDCOMMS_OPT_LEN		sizeof(struct dlm_opts)
#define DLM_MAX_APP_BUFSIZE		(DLM_MAX_SOCKET_BUFSIZE - \
					 DLM_MIDCOMMS_OPT_LEN)

#define CONN_HASH_SIZE 32

/* This is deliberately very simple because most clusters have simple
 * sequential nodeids, so we should be able to go straight to a connection
 * struct in the array
 */
static inline int nodeid_hash(int nodeid)
{
	return nodeid & (CONN_HASH_SIZE-1);
}

/* check if dlm is running */
bool dlm_lowcomms_is_running(void);

int dlm_lowcomms_start(void);
void dlm_lowcomms_shutdown(void);
void dlm_lowcomms_shutdown_node(int nodeid, bool force);
void dlm_lowcomms_stop(void);
void dlm_lowcomms_init(void);
void dlm_lowcomms_exit(void);
int dlm_lowcomms_close(int nodeid);
struct dlm_msg *dlm_lowcomms_new_msg(int nodeid, int len, char **ppc,
				     void (*cb)(void *data), void *data);
void dlm_lowcomms_commit_msg(struct dlm_msg *msg);
void dlm_lowcomms_put_msg(struct dlm_msg *msg);
int dlm_lowcomms_resend_msg(struct dlm_msg *msg);
int dlm_lowcomms_connect_node(int nodeid);
int dlm_lowcomms_nodes_set_mark(int nodeid, unsigned int mark);
int dlm_lowcomms_addr(int nodeid, struct sockaddr_storage *addr);
void dlm_midcomms_receive_done(int nodeid);
struct kmem_cache *dlm_lowcomms_writequeue_cache_create(void);
struct kmem_cache *dlm_lowcomms_msg_cache_create(void);

#endif				/* __LOWCOMMS_DOT_H__ */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0-only */
	2	/******************************************************************************
	3	*******************************************************************************
	4	**
	5	** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	6	** Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
	7	**
	8	**
	9	*******************************************************************************
	10	******************************************************************************/
	11
	12	#ifndef __LOWCOMMS_DOT_H__
	13	#define __LOWCOMMS_DOT_H__
	14
	15	#include "dlm_internal.h"
	16
	17	#define DLM_MIDCOMMS_OPT_LEN sizeof(struct dlm_opts)
	18	#define DLM_MAX_APP_BUFSIZE (DLM_MAX_SOCKET_BUFSIZE - \
	19	DLM_MIDCOMMS_OPT_LEN)
	20
	21	#define CONN_HASH_SIZE 32
	22
	23	/* This is deliberately very simple because most clusters have simple
	24	* sequential nodeids, so we should be able to go straight to a connection
	25	* struct in the array
	26	*/
	27	static inline int nodeid_hash(int nodeid)
	28	{
	29	return nodeid & (CONN_HASH_SIZE-1);
	30	}
	31
	32	/* check if dlm is running */
	33	bool dlm_lowcomms_is_running(void);
	34
	35	int dlm_lowcomms_start(void);
	36	void dlm_lowcomms_shutdown(void);
	37	void dlm_lowcomms_shutdown_node(int nodeid, bool force);
	38	void dlm_lowcomms_stop(void);
	39	void dlm_lowcomms_init(void);
	40	void dlm_lowcomms_exit(void);
	41	int dlm_lowcomms_close(int nodeid);
	42	struct dlm_msg dlm_lowcomms_new_msg(int nodeid, int len, char *ppc,
	43	void (cb)(void data), void *data);
	44	void dlm_lowcomms_commit_msg(struct dlm_msg *msg);
	45	void dlm_lowcomms_put_msg(struct dlm_msg *msg);
	46	int dlm_lowcomms_resend_msg(struct dlm_msg *msg);
	47	int dlm_lowcomms_connect_node(int nodeid);
	48	int dlm_lowcomms_nodes_set_mark(int nodeid, unsigned int mark);
	49	int dlm_lowcomms_addr(int nodeid, struct sockaddr_storage *addr);
	50	void dlm_midcomms_receive_done(int nodeid);
	51	struct kmem_cache *dlm_lowcomms_writequeue_cache_create(void);
	52	struct kmem_cache *dlm_lowcomms_msg_cache_create(void);
	53
	54	#endif /* __LOWCOMMS_DOT_H__ */
	55