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