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f788920610
[ Upstream commit8b0188b0d6] This patch introduces leftovers of init, start, stop and exit functionality. The dlm application layer should always call the midcomms layer which getting aware of such event and redirect it to the lowcomms layer. Some functionality which is currently handled inside the start functionality of midcomms and lowcomms should be handled in the init functionality as it only need to be initialized once when dlm is loaded. Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com> Stable-dep-of:aad633dc0c("fs: dlm: start midcomms before scand") Signed-off-by: Sasha Levin <sashal@kernel.org>
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
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**
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**
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*******************************************************************************
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******************************************************************************/
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#ifndef __LOWCOMMS_DOT_H__
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#define __LOWCOMMS_DOT_H__
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#include "dlm_internal.h"
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#define DLM_MIDCOMMS_OPT_LEN sizeof(struct dlm_opts)
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#define DLM_MAX_APP_BUFSIZE (DLM_MAX_SOCKET_BUFSIZE - \
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DLM_MIDCOMMS_OPT_LEN)
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#define CONN_HASH_SIZE 32
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/* This is deliberately very simple because most clusters have simple
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* sequential nodeids, so we should be able to go straight to a connection
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* struct in the array
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*/
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static inline int nodeid_hash(int nodeid)
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{
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return nodeid & (CONN_HASH_SIZE-1);
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}
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/* switch to check if dlm is running */
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extern int dlm_allow_conn;
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int dlm_lowcomms_start(void);
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void dlm_lowcomms_shutdown(void);
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void dlm_lowcomms_stop(void);
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void dlm_lowcomms_init(void);
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void dlm_lowcomms_exit(void);
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int dlm_lowcomms_close(int nodeid);
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struct dlm_msg *dlm_lowcomms_new_msg(int nodeid, int len, gfp_t allocation,
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char **ppc, void (*cb)(void *data),
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void *data);
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void dlm_lowcomms_commit_msg(struct dlm_msg *msg);
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void dlm_lowcomms_put_msg(struct dlm_msg *msg);
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int dlm_lowcomms_resend_msg(struct dlm_msg *msg);
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int dlm_lowcomms_connect_node(int nodeid);
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int dlm_lowcomms_nodes_set_mark(int nodeid, unsigned int mark);
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int dlm_lowcomms_addr(int nodeid, struct sockaddr_storage *addr, int len);
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void dlm_midcomms_receive_done(int nodeid);
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struct kmem_cache *dlm_lowcomms_writequeue_cache_create(void);
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struct kmem_cache *dlm_lowcomms_msg_cache_create(void);
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#endif /* __LOWCOMMS_DOT_H__ */
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