diff options
Diffstat (limited to 'drivers/staging/zcache/ramster/heartbeat.h')
| -rw-r--r-- | drivers/staging/zcache/ramster/heartbeat.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/staging/zcache/ramster/heartbeat.h b/drivers/staging/zcache/ramster/heartbeat.h new file mode 100644 index 00000000000..6cbc775bd63 --- /dev/null +++ b/drivers/staging/zcache/ramster/heartbeat.h @@ -0,0 +1,87 @@ +/* -*- 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 R2CLUSTER_HEARTBEAT_H +#define R2CLUSTER_HEARTBEAT_H + +#define R2HB_REGION_TIMEOUT_MS 2000 + +#define R2HB_MAX_REGION_NAME_LEN 32 + +/* number of changes to be seen as live */ +#define R2HB_LIVE_THRESHOLD 2 +/* number of equal samples to be seen as dead */ +extern unsigned int r2hb_dead_threshold; +#define R2HB_DEFAULT_DEAD_THRESHOLD 31 +/* Otherwise MAX_WRITE_TIMEOUT will be zero... */ +#define R2HB_MIN_DEAD_THRESHOLD 2 +#define R2HB_MAX_WRITE_TIMEOUT_MS \ + (R2HB_REGION_TIMEOUT_MS * (r2hb_dead_threshold - 1)) + +#define R2HB_CB_MAGIC 0x51d1e4ec + +/* callback stuff */ +enum r2hb_callback_type { + R2HB_NODE_DOWN_CB = 0, + R2HB_NODE_UP_CB, + R2HB_NUM_CB +}; + +struct r2nm_node; +typedef void (r2hb_cb_func)(struct r2nm_node *, int, void *); + +struct r2hb_callback_func { + u32 hc_magic; + struct list_head hc_item; + r2hb_cb_func *hc_func; + void *hc_data; + int hc_priority; + enum r2hb_callback_type hc_type; +}; + +struct config_group *r2hb_alloc_hb_set(void); +void r2hb_free_hb_set(struct config_group *group); + +void r2hb_setup_callback(struct r2hb_callback_func *hc, + enum r2hb_callback_type type, + r2hb_cb_func *func, + void *data, + int priority); +int r2hb_register_callback(const char *region_uuid, + struct r2hb_callback_func *hc); +void r2hb_unregister_callback(const char *region_uuid, + struct r2hb_callback_func *hc); +void r2hb_fill_node_map(unsigned long *map, + unsigned bytes); +void r2hb_exit(void); +int r2hb_init(void); +int r2hb_check_node_heartbeating_from_callback(u8 node_num); +void r2hb_stop_all_regions(void); +int r2hb_get_all_regions(char *region_uuids, u8 numregions); +int r2hb_global_heartbeat_active(void); +void r2hb_manual_set_node_heartbeating(int); + +#endif /* R2CLUSTER_HEARTBEAT_H */ |