[thirdparty/mdadm.git] / mdmon.h

enum array_state { clear, inactive, suspended, readonly, read_auto,
		   clean, active, write_pending, active_idle, bad_word};

enum sync_action { idle, reshape, resync, recover, check, repair, bad_action };


struct active_array {
	struct mdinfo info;
	struct supertype *container;
	struct active_array *next, *replaces;

	int action_fd;
	int resync_start_fd;
	int metadata_fd; /* for monitoring rw/ro status */

	enum array_state prev_state, curr_state, next_state;
	enum sync_action prev_action, curr_action, next_action;

	int check_degraded; /* flag set by mon, read by manage */

	int devnum;

	unsigned long long resync_start;
};

/*
 * Metadata updates are handled by the monitor thread,
 * as it has exclusive access to the metadata.
 * When the manager want to updates metadata, either
 * for it's own reason (e.g. committing a spare) or
 * on behalf of mdadm, it creates a metadata_update
 * structure and queues it to the monitor.
 * Updates are created and processed by code under the
 * superswitch.  All common code sees them as opaque
 * blobs.
 */
extern struct metadata_update *update_queue, *update_queue_handled;

#define MD_MAJOR 9

extern struct active_array *container;
extern struct active_array *discard_this;
extern struct active_array *pending_discard;
extern struct md_generic_cmd *active_cmd;


void remove_pidfile(char *devname);
void do_monitor(struct supertype *container);
void do_manager(struct supertype *container);
int make_control_sock(char *devname);
int make_pidfile(char *devname, int o_excl);
extern int socket_hup_requested;

int read_dev_state(int fd);
int get_resync_start(struct active_array *a);

struct mdstat_ent *mdstat_read(int hold, int start);

extern int exit_now, manager_ready;
extern int mon_tid, mgr_tid;
extern int monitor_loop_cnt;

/* helper routine to determine resync completion since MaxSector is a
 * moving target
 */
static inline int is_resync_complete(struct active_array *a)
{
	if (a->resync_start >= a->info.component_size)
		return 1;
	return 0;
}
Commit	Line	Data
	1	enum array_state { clear, inactive, suspended, readonly, read_auto,
	2	clean, active, write_pending, active_idle, bad_word};
	3
	4	enum sync_action { idle, reshape, resync, recover, check, repair, bad_action };
	5
	6
	7	struct active_array {
	8	struct mdinfo info;
	9	struct supertype *container;
	10	struct active_array next, replaces;
	11
	12	int action_fd;
	13	int resync_start_fd;
	14	int metadata_fd; /* for monitoring rw/ro status */
	15
	16	enum array_state prev_state, curr_state, next_state;
	17	enum sync_action prev_action, curr_action, next_action;
	18
	19	int check_degraded; /* flag set by mon, read by manage */
	20
	21	int devnum;
	22
	23	unsigned long long resync_start;
	24	};
	25
	26	/*
	27	* Metadata updates are handled by the monitor thread,
	28	* as it has exclusive access to the metadata.
	29	* When the manager want to updates metadata, either
	30	* for it's own reason (e.g. committing a spare) or
	31	* on behalf of mdadm, it creates a metadata_update
	32	* structure and queues it to the monitor.
	33	* Updates are created and processed by code under the
	34	* superswitch. All common code sees them as opaque
	35	* blobs.
	36	*/
	37	extern struct metadata_update update_queue, update_queue_handled;
	38
	39	#define MD_MAJOR 9
	40
	41	extern struct active_array *container;
	42	extern struct active_array *discard_this;
	43	extern struct active_array *pending_discard;
	44	extern struct md_generic_cmd *active_cmd;
	45
	46
	47	void remove_pidfile(char *devname);
	48	void do_monitor(struct supertype *container);
	49	void do_manager(struct supertype *container);
	50	int make_control_sock(char *devname);
	51	int make_pidfile(char *devname, int o_excl);
	52	extern int socket_hup_requested;
	53
	54	int read_dev_state(int fd);
	55	int get_resync_start(struct active_array *a);
	56
	57	struct mdstat_ent *mdstat_read(int hold, int start);
	58
	59	extern int exit_now, manager_ready;
	60	extern int mon_tid, mgr_tid;
	61	extern int monitor_loop_cnt;
	62
	63	/* helper routine to determine resync completion since MaxSector is a
	64	* moving target
	65	*/
	66	static inline int is_resync_complete(struct active_array *a)
	67	{
	68	if (a->resync_start >= a->info.component_size)
	69	return 1;
	70	return 0;
	71	}
	72