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authorMark Fasheh <mark.fasheh@oracle.com>2005-12-15 14:31:23 -0800
committerJoel Becker <joel.becker@oracle.com>2006-01-03 11:45:46 -0800
commita7f6a5fb4bde142b622706e2006ba33f793e13ed (patch)
tree27db335992f61a13658e604ee56f4c6a3c79aea5 /fs/ocfs2/cluster/heartbeat.h
parent0c83ed8eeb28a045cdbd0b216679938aa9e665fe (diff)
[PATCH] OCFS2: The Second Oracle Cluster Filesystem
Disk based heartbeat. Configured and started from userspace, the kernel component handles I/O submission and event generation via callback mechanism. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Diffstat (limited to 'fs/ocfs2/cluster/heartbeat.h')
-rw-r--r--fs/ocfs2/cluster/heartbeat.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/fs/ocfs2/cluster/heartbeat.h b/fs/ocfs2/cluster/heartbeat.h
new file mode 100644
index 00000000000..cac6223206a
--- /dev/null
+++ b/fs/ocfs2/cluster/heartbeat.h
@@ -0,0 +1,82 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * heartbeat.h
+ *
+ * Function prototypes
+ *
+ * Copyright (C) 2004 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ *
+ */
+
+#ifndef O2CLUSTER_HEARTBEAT_H
+#define O2CLUSTER_HEARTBEAT_H
+
+#include "ocfs2_heartbeat.h"
+
+#define O2HB_REGION_TIMEOUT_MS 2000
+
+/* number of changes to be seen as live */
+#define O2HB_LIVE_THRESHOLD 2
+/* number of equal samples to be seen as dead */
+extern unsigned int o2hb_dead_threshold;
+#define O2HB_DEFAULT_DEAD_THRESHOLD 7
+/* Otherwise MAX_WRITE_TIMEOUT will be zero... */
+#define O2HB_MIN_DEAD_THRESHOLD 2
+#define O2HB_MAX_WRITE_TIMEOUT_MS (O2HB_REGION_TIMEOUT_MS * (o2hb_dead_threshold - 1))
+
+#define O2HB_CB_MAGIC 0x51d1e4ec
+
+/* callback stuff */
+enum o2hb_callback_type {
+ O2HB_NODE_DOWN_CB = 0,
+ O2HB_NODE_UP_CB,
+ O2HB_NUM_CB
+};
+
+struct o2nm_node;
+typedef void (o2hb_cb_func)(struct o2nm_node *, int, void *);
+
+struct o2hb_callback_func {
+ u32 hc_magic;
+ struct list_head hc_item;
+ o2hb_cb_func *hc_func;
+ void *hc_data;
+ int hc_priority;
+ enum o2hb_callback_type hc_type;
+};
+
+struct config_group *o2hb_alloc_hb_set(void);
+void o2hb_free_hb_set(struct config_group *group);
+
+void o2hb_setup_callback(struct o2hb_callback_func *hc,
+ enum o2hb_callback_type type,
+ o2hb_cb_func *func,
+ void *data,
+ int priority);
+int o2hb_register_callback(struct o2hb_callback_func *hc);
+int o2hb_unregister_callback(struct o2hb_callback_func *hc);
+void o2hb_fill_node_map(unsigned long *map,
+ unsigned bytes);
+void o2hb_init(void);
+int o2hb_check_node_heartbeating(u8 node_num);
+int o2hb_check_node_heartbeating_from_callback(u8 node_num);
+int o2hb_check_local_node_heartbeating(void);
+void o2hb_stop_all_regions(void);
+
+#endif /* O2CLUSTER_HEARTBEAT_H */