#ifndef __DMU_H
#define __DMU_H

#include <stdint.h>

/**************
 * dm-userspace
 **************/

enum {
        DMU_STATUS_UNKNOWN = 0,
        DMU_STATUS_BLOCK_FLUSHED,
        DMU_STATUS_INVAL_COMPLETE,
        DMU_STATUS_INVAL_FAILED,
        DMU_STATUS_SYNC_COMPLETE
};

struct dmu_context;
struct dmu_map_data;

typedef int (*status_handler)(void *data, uint64_t id, uint32_t status);
typedef int (*map_req_handler)(void *data, struct dmu_map_data *map_data);

/* High-level control operations */
struct dmu_context *dmu_ctl_open(char *dev, int flags);
int dmu_ctl_close(struct dmu_context *ctx);
int dmu_ctl_send_queue(struct dmu_context *ctx);
void dmu_register_status_handler(struct dmu_context *ctx,
                                 status_handler handler,
                                 void *data);
void dmu_register_map_handler(struct dmu_context *ctx,
                              map_req_handler handler,
                              void *data);
int dmu_invalidate_block(struct dmu_context *ctx, uint64_t block);
int dmu_sync_complete(struct dmu_context *ctx, uint64_t id);
int dmu_events_pending(struct dmu_context *ctx, unsigned int msec);
int dmu_process_events(struct dmu_context *ctx);

/* Map manipulation functions */
void dmu_map_set_block(struct dmu_map_data *data, uint64_t block);
uint64_t dmu_map_get_block(struct dmu_map_data *data);
void dmu_map_set_offset(struct dmu_map_data *data, int64_t offset);
uint32_t dmu_map_get_id(struct dmu_map_data *data);
void dmu_map_set_dest_dev(struct dmu_map_data *data, dev_t dev);
void dmu_map_set_copy_src_dev(struct dmu_map_data *data, dev_t dev);
void dmu_map_set_writable(struct dmu_map_data *data, int writable);
int dmu_map_is_write(struct dmu_map_data *data);
void dmu_map_set_sync(struct dmu_map_data *data);

#endif