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 */
nodeid_hash(int nodeid)27 static inline int nodeid_hash(int nodeid)
28 {
29 return nodeid & (CONN_HASH_SIZE-1);
30 }
31
32 /* switch to check if dlm is running */
33 extern int dlm_allow_conn;
34
35 int dlm_lowcomms_start(void);
36 void dlm_lowcomms_shutdown(void);
37 void dlm_lowcomms_stop(void);
38 void dlm_lowcomms_exit(void);
39 int dlm_lowcomms_close(int nodeid);
40 struct dlm_msg *dlm_lowcomms_new_msg(int nodeid, int len, gfp_t allocation,
41 char **ppc, void (*cb)(struct dlm_mhandle *mh),
42 struct dlm_mhandle *mh);
43 void dlm_lowcomms_commit_msg(struct dlm_msg *msg);
44 void dlm_lowcomms_put_msg(struct dlm_msg *msg);
45 int dlm_lowcomms_resend_msg(struct dlm_msg *msg);
46 int dlm_lowcomms_connect_node(int nodeid);
47 int dlm_lowcomms_nodes_set_mark(int nodeid, unsigned int mark);
48 int dlm_lowcomms_addr(int nodeid, struct sockaddr_storage *addr, int len);
49 void dlm_midcomms_receive_done(int nodeid);
50
51 #endif /* __LOWCOMMS_DOT_H__ */
52
53