1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * heartbeat.c
5 *
6 * Register ourselves with the heartbaet service, keep our node maps
7 * up to date, and fire off recovery when needed.
8 *
9 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public
13 * License as published by the Free Software Foundation; either
14 * version 2 of the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public
22 * License along with this program; if not, write to the
23 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 * Boston, MA 021110-1307, USA.
25 */
26
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 #include <linux/highmem.h>
30
31 #include <cluster/masklog.h>
32
33 #include "ocfs2.h"
34
35 #include "alloc.h"
36 #include "heartbeat.h"
37 #include "inode.h"
38 #include "journal.h"
39 #include "ocfs2_trace.h"
40
41 #include "buffer_head_io.h"
42
43 static inline void __ocfs2_node_map_set_bit(struct ocfs2_node_map *map,
44 int bit);
45 static inline void __ocfs2_node_map_clear_bit(struct ocfs2_node_map *map,
46 int bit);
47
48 /* special case -1 for now
49 * TODO: should *really* make sure the calling func never passes -1!! */
ocfs2_node_map_init(struct ocfs2_node_map * map)50 static void ocfs2_node_map_init(struct ocfs2_node_map *map)
51 {
52 map->num_nodes = OCFS2_NODE_MAP_MAX_NODES;
53 memset(map->map, 0, BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES) *
54 sizeof(unsigned long));
55 }
56
ocfs2_init_node_maps(struct ocfs2_super * osb)57 void ocfs2_init_node_maps(struct ocfs2_super *osb)
58 {
59 spin_lock_init(&osb->node_map_lock);
60 ocfs2_node_map_init(&osb->osb_recovering_orphan_dirs);
61 }
62
ocfs2_do_node_down(int node_num,void * data)63 void ocfs2_do_node_down(int node_num, void *data)
64 {
65 struct ocfs2_super *osb = data;
66
67 BUG_ON(osb->node_num == node_num);
68
69 trace_ocfs2_do_node_down(node_num);
70
71 if (!osb->cconn) {
72 /*
73 * No cluster connection means we're not even ready to
74 * participate yet. We check the slots after the cluster
75 * comes up, so we will notice the node death then. We
76 * can safely ignore it here.
77 */
78 return;
79 }
80
81 ocfs2_recovery_thread(osb, node_num);
82 }
83
__ocfs2_node_map_set_bit(struct ocfs2_node_map * map,int bit)84 static inline void __ocfs2_node_map_set_bit(struct ocfs2_node_map *map,
85 int bit)
86 {
87 set_bit(bit, map->map);
88 }
89
ocfs2_node_map_set_bit(struct ocfs2_super * osb,struct ocfs2_node_map * map,int bit)90 void ocfs2_node_map_set_bit(struct ocfs2_super *osb,
91 struct ocfs2_node_map *map,
92 int bit)
93 {
94 if (bit==-1)
95 return;
96 BUG_ON(bit >= map->num_nodes);
97 spin_lock(&osb->node_map_lock);
98 __ocfs2_node_map_set_bit(map, bit);
99 spin_unlock(&osb->node_map_lock);
100 }
101
__ocfs2_node_map_clear_bit(struct ocfs2_node_map * map,int bit)102 static inline void __ocfs2_node_map_clear_bit(struct ocfs2_node_map *map,
103 int bit)
104 {
105 clear_bit(bit, map->map);
106 }
107
ocfs2_node_map_clear_bit(struct ocfs2_super * osb,struct ocfs2_node_map * map,int bit)108 void ocfs2_node_map_clear_bit(struct ocfs2_super *osb,
109 struct ocfs2_node_map *map,
110 int bit)
111 {
112 if (bit==-1)
113 return;
114 BUG_ON(bit >= map->num_nodes);
115 spin_lock(&osb->node_map_lock);
116 __ocfs2_node_map_clear_bit(map, bit);
117 spin_unlock(&osb->node_map_lock);
118 }
119
ocfs2_node_map_test_bit(struct ocfs2_super * osb,struct ocfs2_node_map * map,int bit)120 int ocfs2_node_map_test_bit(struct ocfs2_super *osb,
121 struct ocfs2_node_map *map,
122 int bit)
123 {
124 int ret;
125 if (bit >= map->num_nodes) {
126 mlog(ML_ERROR, "bit=%d map->num_nodes=%d\n", bit, map->num_nodes);
127 BUG();
128 }
129 spin_lock(&osb->node_map_lock);
130 ret = test_bit(bit, map->map);
131 spin_unlock(&osb->node_map_lock);
132 return ret;
133 }
134
135