1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * heartbeat.c
4 *
5 * Register ourselves with the heartbeat service, keep our node maps
6 * up to date, and fire off recovery when needed.
7 *
8 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
9 */
10
11#include <linux/bitmap.h>
12#include <linux/fs.h>
13#include <linux/types.h>
14#include <linux/highmem.h>
15
16#include <cluster/masklog.h>
17
18#include "ocfs2.h"
19
20#include "alloc.h"
21#include "heartbeat.h"
22#include "inode.h"
23#include "journal.h"
24#include "ocfs2_trace.h"
25
26#include "buffer_head_io.h"
27
28/* special case -1 for now
29 * TODO: should *really* make sure the calling func never passes -1!!  */
30static void ocfs2_node_map_init(struct ocfs2_node_map *map)
31{
32	map->num_nodes = OCFS2_NODE_MAP_MAX_NODES;
33	bitmap_zero(map->map, OCFS2_NODE_MAP_MAX_NODES);
34}
35
36void ocfs2_init_node_maps(struct ocfs2_super *osb)
37{
38	spin_lock_init(&osb->node_map_lock);
39	ocfs2_node_map_init(&osb->osb_recovering_orphan_dirs);
40}
41
42void ocfs2_do_node_down(int node_num, void *data)
43{
44	struct ocfs2_super *osb = data;
45
46	BUG_ON(osb->node_num == node_num);
47
48	trace_ocfs2_do_node_down(node_num);
49
50	if (!osb->cconn) {
51		/*
52		 * No cluster connection means we're not even ready to
53		 * participate yet.  We check the slots after the cluster
54		 * comes up, so we will notice the node death then.  We
55		 * can safely ignore it here.
56		 */
57		return;
58	}
59
60	ocfs2_recovery_thread(osb, node_num);
61}
62
63void ocfs2_node_map_set_bit(struct ocfs2_super *osb,
64			    struct ocfs2_node_map *map,
65			    int bit)
66{
67	if (bit==-1)
68		return;
69	BUG_ON(bit >= map->num_nodes);
70	spin_lock(&osb->node_map_lock);
71	set_bit(bit, map->map);
72	spin_unlock(&osb->node_map_lock);
73}
74
75void ocfs2_node_map_clear_bit(struct ocfs2_super *osb,
76			      struct ocfs2_node_map *map,
77			      int bit)
78{
79	if (bit==-1)
80		return;
81	BUG_ON(bit >= map->num_nodes);
82	spin_lock(&osb->node_map_lock);
83	clear_bit(bit, map->map);
84	spin_unlock(&osb->node_map_lock);
85}
86
87int ocfs2_node_map_test_bit(struct ocfs2_super *osb,
88			    struct ocfs2_node_map *map,
89			    int bit)
90{
91	int ret;
92	if (bit >= map->num_nodes) {
93		mlog(ML_ERROR, "bit=%d map->num_nodes=%d\n", bit, map->num_nodes);
94		BUG();
95	}
96	spin_lock(&osb->node_map_lock);
97	ret = test_bit(bit, map->map);
98	spin_unlock(&osb->node_map_lock);
99	return ret;
100}
101
102