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 /* 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)(void *data), 42 void *data); 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 struct kmem_cache *dlm_lowcomms_writequeue_cache_create(void); 51 struct kmem_cache *dlm_lowcomms_msg_cache_create(void); 52 53 #endif /* __LOWCOMMS_DOT_H__ */ 54 55