#ifndef __CODA_PSDEV_H
  #define __CODA_PSDEV_H

  #include <linux/magic.h>

  #define CODA_PSDEV_MAJOR 67
  #define MAX_CODADEVS  5	   /* how many do we allow */

  #ifdef __KERNEL__

  #include <linux/backing-dev.h>

  #include <linux/mutex.h>

  struct kstatfs;

  /* communication pending/processing queues */
  struct venus_comm {
  	u_long		    vc_seq;
  	wait_queue_head_t   vc_waitq; /* Venus wait queue */
  	struct list_head    vc_pending;
  	struct list_head    vc_processing;
  	int                 vc_inuse;
  	struct super_block *vc_sb;

  	struct backing_dev_info bdi;

  	struct mutex	    vc_mutex;

  };

  static inline struct venus_comm *coda_vcp(struct super_block *sb)

  {

  	return (struct venus_comm *)((sb)->s_fs_info);

  }

  /* upcalls */
  int venus_rootfid(struct super_block *sb, struct CodaFid *fidp);
  int venus_getattr(struct super_block *sb, struct CodaFid *fid,
  		  struct coda_vattr *attr);
  int venus_setattr(struct super_block *, struct CodaFid *, struct coda_vattr *);
  int venus_lookup(struct super_block *sb, struct CodaFid *fid, 
  		 const char *name, int length, int *type, 
  		 struct CodaFid *resfid);

  int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
  		vuid_t uid);
  int venus_open(struct super_block *sb, struct CodaFid *fid, int flags,
  	       struct file **f);
  int venus_mkdir(struct super_block *sb, struct CodaFid *dirfid, 
  		const char *name, int length, 
  		struct CodaFid *newfid, struct coda_vattr *attrs);
  int venus_create(struct super_block *sb, struct CodaFid *dirfid, 
  		 const char *name, int length, int excl, int mode,
  		 struct CodaFid *newfid, struct coda_vattr *attrs) ;
  int venus_rmdir(struct super_block *sb, struct CodaFid *dirfid, 
  		const char *name, int length);
  int venus_remove(struct super_block *sb, struct CodaFid *dirfid, 
  		 const char *name, int length);
  int venus_readlink(struct super_block *sb, struct CodaFid *fid, 
  		   char *buffer, int *length);
  int venus_rename(struct super_block *, struct CodaFid *new_fid, 
  		 struct CodaFid *old_fid, size_t old_length, 
  		 size_t new_length, const char *old_name, 
  		 const char *new_name);
  int venus_link(struct super_block *sb, struct CodaFid *fid, 
  		  struct CodaFid *dirfid, const char *name, int len );
  int venus_symlink(struct super_block *sb, struct CodaFid *fid,
  		  const char *name, int len, const char *symname, int symlen);
  int venus_access(struct super_block *sb, struct CodaFid *fid, int mask);
  int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
  		 unsigned int cmd, struct PioctlData *data);

  int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out);

  int venus_fsync(struct super_block *sb, struct CodaFid *fid);

  int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);

  /*
   * Statistics
   */
  
  extern struct venus_comm coda_comms[];
  #endif /* __KERNEL__ */

  
  /* messages between coda filesystem in kernel and Venus */

  struct upc_req {
  	struct list_head    uc_chain;
  	caddr_t	            uc_data;
  	u_short	            uc_flags;
  	u_short             uc_inSize;  /* Size is at most 5000 bytes */
  	u_short	            uc_outSize;
  	u_short	            uc_opcode;  /* copied from data to save lookup */
  	int		    uc_unique;
  	wait_queue_head_t   uc_sleep;   /* process' wait queue */

  };

  #define CODA_REQ_ASYNC  0x1
  #define CODA_REQ_READ   0x2
  #define CODA_REQ_WRITE  0x4
  #define CODA_REQ_ABORT  0x8

  #endif