fs/ocfs2/cluster/heartbeat.h

File Facts

System

Linux kernel

Corpus path

fs/ocfs2/cluster/heartbeat.h

Extension

.h

Size

1925 bytes

Lines

72

Domain

Core OS

Bucket

VFS And Filesystem Core

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• ocfs2_heartbeat.h

Detected Declarations

• struct o2nm_node
• struct o2hb_callback_func
• enum o2hb_callback_type

Annotated Snippet

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 int bits);
void o2hb_exit(void);
void o2hb_init(void);
int o2hb_check_node_heartbeating_no_sem(u8 node_num);
int o2hb_check_node_heartbeating_from_callback(u8 node_num);
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 */

Annotation

• Immediate include surface: `ocfs2_heartbeat.h`.
• Detected declarations: `struct o2nm_node`, `struct o2hb_callback_func`, `enum o2hb_callback_type`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.