text: #ifndef _SCSI_PRIV_H
  #define _SCSI_PRIV_H
  
  #include <linux/device.h>
  #include <linux/async.h>
  #include <scsi/scsi_device.h>
  
  struct request_queue;
  struct request;
  struct scsi_cmnd;
  struct scsi_device;
  struct scsi_target;
  struct scsi_host_template;
  struct Scsi_Host;
  struct scsi_nl_hdr;
  
  
  /*
   * Scsi Error Handler Flags
   */
  #define SCSI_EH_CANCEL_CMD	0x0001	/* Cancel this cmd */
  #define SCSI_EH_ABORT_SCHEDULED	0x0002	/* Abort has been scheduled */
  
  #define SCSI_SENSE_VALID(scmd) \
  	(((scmd)->sense_buffer[0] & 0x70) == 0x70)
  
  /* hosts.c */
  extern int scsi_init_hosts(void);
  extern void scsi_exit_hosts(void);
  
  /* scsi.c */
  extern int scsi_setup_command_freelist(struct Scsi_Host *shost);
  extern void scsi_destroy_command_freelist(struct Scsi_Host *shost);
  #ifdef CONFIG_SCSI_LOGGING
  void scsi_log_send(struct scsi_cmnd *cmd);
  void scsi_log_completion(struct scsi_cmnd *cmd, int disposition);
  #else
  static inline void scsi_log_send(struct scsi_cmnd *cmd) 
  	{ };
  static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
  	{ };
  #endif
  
  /* scsi_devinfo.c */
  
  /* list of keys for the lists */
  enum {
  	SCSI_DEVINFO_GLOBAL = 0,
  	SCSI_DEVINFO_SPI,
  };
  
  extern int scsi_get_device_flags(struct scsi_device *sdev,
  				 const unsigned char *vendor,
  				 const unsigned char *model);
  extern int scsi_get_device_flags_keyed(struct scsi_device *sdev,
  				       const unsigned char *vendor,
  				       const unsigned char *model, int key);
  extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor,
  					char *model, char *strflags,
  					int flags, int key);
  extern int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key);
  extern int scsi_dev_info_add_list(int key, const char *name);
  extern int scsi_dev_info_remove_list(int key);
  
  extern int __init scsi_init_devinfo(void);
  extern void scsi_exit_devinfo(void);
  
  /* scsi_error.c */
  extern void scmd_eh_abort_handler(struct work_struct *work);
  extern enum blk_eh_timer_return scsi_times_out(struct request *req);
  extern int scsi_error_handler(void *host);
  extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
  extern void scsi_eh_wakeup(struct Scsi_Host *shost);
  extern int scsi_eh_scmd_add(struct scsi_cmnd *, int);
  void scsi_eh_ready_devs(struct Scsi_Host *shost,
  			struct list_head *work_q,
  			struct list_head *done_q);
  int scsi_eh_get_sense(struct list_head *work_q,
  		      struct list_head *done_q);
  int scsi_noretry_cmd(struct scsi_cmnd *scmd);
  
  /* scsi_lib.c */
  extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
  extern void scsi_device_unbusy(struct scsi_device *sdev);
  extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
  extern void scsi_io_completion(struct scsi_cmnd *, unsigned int);
  extern void scsi_run_host_queues(struct Scsi_Host *shost);
  extern struct request_queue *scsi_alloc_queue(struct scsi_device *sdev);
  extern struct request_queue *scsi_mq_alloc_queue(struct scsi_device *sdev);
  extern int scsi_mq_setup_tags(struct Scsi_Host *shost);
  extern void scsi_mq_destroy_tags(struct Scsi_Host *shost);
  extern int scsi_init_queue(void);
  extern void scsi_exit_queue(void);
  struct request_queue;
  struct request;
  extern struct kmem_cache *scsi_sdb_cache;
  
  /* scsi_proc.c */
  #ifdef CONFIG_SCSI_PROC_FS
  extern void scsi_proc_hostdir_add(struct scsi_host_template *);
  extern void scsi_proc_hostdir_rm(struct scsi_host_template *);
  extern void scsi_proc_host_add(struct Scsi_Host *);
  extern void scsi_proc_host_rm(struct Scsi_Host *);
  extern int scsi_init_procfs(void);
  extern void scsi_exit_procfs(void);
  #else
  # define scsi_proc_hostdir_add(sht)	do { } while (0)
  # define scsi_proc_hostdir_rm(sht)	do { } while (0)
  # define scsi_proc_host_add(shost)	do { } while (0)
  # define scsi_proc_host_rm(shost)	do { } while (0)
  # define scsi_init_procfs()		(0)
  # define scsi_exit_procfs()		do { } while (0)
  #endif /* CONFIG_PROC_FS */
  
  /* scsi_scan.c */
  extern char scsi_scan_type[];
  extern int scsi_complete_async_scans(void);
  extern int scsi_scan_host_selected(struct Scsi_Host *, unsigned int,
  				   unsigned int, u64, int);
  extern void scsi_forget_host(struct Scsi_Host *);
  extern void scsi_rescan_device(struct device *);
  
  /* scsi_sysctl.c */
  #ifdef CONFIG_SYSCTL
  extern int scsi_init_sysctl(void);
  extern void scsi_exit_sysctl(void);
  #else
  # define scsi_init_sysctl()		(0)
  # define scsi_exit_sysctl()		do { } while (0)
  #endif /* CONFIG_SYSCTL */
  
  /* scsi_sysfs.c */
  extern int scsi_sysfs_add_sdev(struct scsi_device *);
  extern int scsi_sysfs_add_host(struct Scsi_Host *);
  extern int scsi_sysfs_register(void);
  extern void scsi_sysfs_unregister(void);
  extern void scsi_sysfs_device_initialize(struct scsi_device *);
  extern int scsi_sysfs_target_initialize(struct scsi_device *);
  extern struct scsi_transport_template blank_transport_template;
  extern void __scsi_remove_device(struct scsi_device *);
  
  extern struct bus_type scsi_bus_type;
  extern const struct attribute_group *scsi_sysfs_shost_attr_groups[];
  
  /* scsi_netlink.c */
  #ifdef CONFIG_SCSI_NETLINK
  extern void scsi_netlink_init(void);
  extern void scsi_netlink_exit(void);
  extern struct sock *scsi_nl_sock;
  #else
  static inline void scsi_netlink_init(void) {}
  static inline void scsi_netlink_exit(void) {}
  #endif
  
  /* scsi_pm.c */
  #ifdef CONFIG_PM
  extern const struct dev_pm_ops scsi_bus_pm_ops;
  
  extern void scsi_autopm_get_target(struct scsi_target *);
  extern void scsi_autopm_put_target(struct scsi_target *);
  extern int scsi_autopm_get_host(struct Scsi_Host *);
  extern void scsi_autopm_put_host(struct Scsi_Host *);
  #else
  static inline void scsi_autopm_get_target(struct scsi_target *t) {}
  static inline void scsi_autopm_put_target(struct scsi_target *t) {}
  static inline int scsi_autopm_get_host(struct Scsi_Host *h) { return 0; }
  static inline void scsi_autopm_put_host(struct Scsi_Host *h) {}
  #endif /* CONFIG_PM */
  
  extern struct async_domain scsi_sd_pm_domain;
  extern struct async_domain scsi_sd_probe_domain;
  
  /* scsi_dh.c */
  #ifdef CONFIG_SCSI_DH
  int scsi_dh_add_device(struct scsi_device *sdev);
  void scsi_dh_release_device(struct scsi_device *sdev);
  void scsi_dh_remove_device(struct scsi_device *sdev);
  #else
  static inline int scsi_dh_add_device(struct scsi_device *sdev) { return 0; }
  static inline void scsi_dh_release_device(struct scsi_device *sdev) { }
  static inline void scsi_dh_remove_device(struct scsi_device *sdev) { }
  #endif
  
  /* 
   * internal scsi timeout functions: for use by mid-layer and transport
   * classes.
   */
  
  #define SCSI_DEVICE_BLOCK_MAX_TIMEOUT	600	/* units in seconds */
  extern int scsi_internal_device_block(struct scsi_device *sdev);
  extern int scsi_internal_device_unblock(struct scsi_device *sdev,
  					enum scsi_device_state new_state);
  
  #endif /* _SCSI_PRIV_H */
  