fs/ocfs2/heartbeat.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * heartbeat.c
0004  *
0005  * Register ourselves with the heartbeat service, keep our node maps
0006  * up to date, and fire off recovery when needed.
0007  *
0008  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
0009  */
0010
0011 #include <linux/bitmap.h>
0012 #include <linux/fs.h>
0013 #include <linux/types.h>
0014 #include <linux/highmem.h>
0015
0016 #include <cluster/masklog.h>
0017
0018 #include "ocfs2.h"
0019
0020 #include "alloc.h"
0021 #include "heartbeat.h"
0022 #include "inode.h"
0023 #include "journal.h"
0024 #include "ocfs2_trace.h"
0025
0026 #include "buffer_head_io.h"
0027
0028 /* special case -1 for now
0029  * TODO: should *really* make sure the calling func never passes -1!!  */
0030 static void ocfs2_node_map_init(struct ocfs2_node_map *map)
0031 {
0032     map->num_nodes = OCFS2_NODE_MAP_MAX_NODES;
0033     bitmap_zero(map->map, OCFS2_NODE_MAP_MAX_NODES);
0034 }
0035
0036 void ocfs2_init_node_maps(struct ocfs2_super *osb)
0037 {
0038     spin_lock_init(&osb->node_map_lock);
0039     ocfs2_node_map_init(&osb->osb_recovering_orphan_dirs);
0040 }
0041
0042 void ocfs2_do_node_down(int node_num, void *data)
0043 {
0044     struct ocfs2_super *osb = data;
0045
0046     BUG_ON(osb->node_num == node_num);
0047
0048     trace_ocfs2_do_node_down(node_num);
0049
0050     if (!osb->cconn) {
0051         /*
0052          * No cluster connection means we're not even ready to
0053          * participate yet.  We check the slots after the cluster
0054          * comes up, so we will notice the node death then.  We
0055          * can safely ignore it here.
0056          */
0057         return;
0058     }
0059
0060     ocfs2_recovery_thread(osb, node_num);
0061 }
0062
0063 void ocfs2_node_map_set_bit(struct ocfs2_super *osb,
0064                 struct ocfs2_node_map *map,
0065                 int bit)
0066 {
0067     if (bit==-1)
0068         return;
0069     BUG_ON(bit >= map->num_nodes);
0070     spin_lock(&osb->node_map_lock);
0071     set_bit(bit, map->map);
0072     spin_unlock(&osb->node_map_lock);
0073 }
0074
0075 void ocfs2_node_map_clear_bit(struct ocfs2_super *osb,
0076                   struct ocfs2_node_map *map,
0077                   int bit)
0078 {
0079     if (bit==-1)
0080         return;
0081     BUG_ON(bit >= map->num_nodes);
0082     spin_lock(&osb->node_map_lock);
0083     clear_bit(bit, map->map);
0084     spin_unlock(&osb->node_map_lock);
0085 }
0086
0087 int ocfs2_node_map_test_bit(struct ocfs2_super *osb,
0088                 struct ocfs2_node_map *map,
0089                 int bit)
0090 {
0091     int ret;
0092     if (bit >= map->num_nodes) {
0093         mlog(ML_ERROR, "bit=%d map->num_nodes=%d\n", bit, map->num_nodes);
0094         BUG();
0095     }
0096     spin_lock(&osb->node_map_lock);
0097     ret = test_bit(bit, map->map);
0098     spin_unlock(&osb->node_map_lock);
0099     return ret;
0100 }
0101