Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / ocfs2 / cluster / heartbeat.h

diff --git a/kernel/fs/ocfs2/cluster/heartbeat.h b/kernel/fs/ocfs2/cluster/heartbeat.h
new file mode 100644 (file)
index 0000000..3ef5137
--- /dev/null
+++ b/kernel/fs/ocfs2/cluster/heartbeat.h
@@ -0,0 +1,90 @@
+/* -*- 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
+
+#define O2HB_MAX_REGION_NAME_LEN       32
+
+/* 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       31
+/* 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(const char *region_uuid,
+                          struct o2hb_callback_func *hc);
+void o2hb_unregister_callback(const char *region_uuid,
+                             struct o2hb_callback_func *hc);
+void o2hb_fill_node_map(unsigned long *map,
+                       unsigned bytes);
+void o2hb_exit(void);
+int o2hb_init(void);
+int o2hb_check_node_heartbeating(u8 node_num);
+int o2hb_check_node_heartbeating_no_sem(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);
+int o2hb_get_all_regions(char *region_uuids, u8 numregions);
+int o2hb_global_heartbeat_active(void);
+
+#endif /* O2CLUSTER_HEARTBEAT_H */