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 #define MLOG_MASK_PREFIX ML_SUPER 32 #include <cluster/masklog.h> 33 34 #include "ocfs2.h" 35 36 #include "alloc.h" 37 #include "heartbeat.h" 38 #include "inode.h" 39 #include "journal.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!! */ 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 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 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 mlog(0, "ocfs2: node down event for %d\n", 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 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 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 } 101 102 static inline void __ocfs2_node_map_clear_bit(struct ocfs2_node_map *map, 103 int bit) 104 { 105 clear_bit(bit, map->map); 106 } 107 108 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 } 119 120 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