[thirdparty/mdadm.git] / mdmon.h

#ifdef DEBUG
#define dprintf(fmt, arg...) \
	fprintf(stderr, fmt, ##arg)
#else
#define dprintf(fmt, arg...) \
        ({ if (0) fprintf(stderr, fmt, ##arg); 0; })
#endif

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