/*-
 * Copyright (c) 1997, 1998
 *	Nan Yang Computer Services Limited.  All rights reserved.
 *
 *  This software is distributed under the so-called ``Berkeley
 *  License'':
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Nan Yang Computer
 *      Services Limited.
 * 4. Neither the name of the Company nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *  
 * This software is provided ``as is'', and any express or implied
 * warranties, including, but not limited to, the implied warranties of
 * merchantability and fitness for a particular purpose are disclaimed.
 * In no event shall the company or contributors be liable for any
 * direct, indirect, incidental, special, exemplary, or consequential
 * damages (including, but not limited to, procurement of substitute
 * goods or services; loss of use, data, or profits; or business
 * interruption) however caused and on any theory of liability, whether
 * in contract, strict liability, or tort (including negligence or
 * otherwise) arising in any way out of the use of this software, even if
 * advised of the possibility of such damage.
 *
 * $Id: vinumext.h,v 1.14 1998/08/11 00:03:57 grog Exp grog $
 */

/* vinumext.h: external definitions */

extern struct _vinum_conf vinum_conf;			    /* configuration information */

#ifdef DEBUG
extern debug;						    /* debug flags */
#endif

#define CHECKALLOC(ptr, msg) \
  if (ptr == NULL) \
    { \
    printf (msg); \
    longjmp (command_fail, -1); \
    }
#ifndef KERNEL
struct vnode;
struct proc;
#endif

#ifdef KERNEL
int give_sd_to_plex(int plexno, int sdno);
int give_plex_to_volume(int volno, int plexno);
int check_drive(char *);
enum drive_label_info read_drive_label(struct drive *drive);
int parse_config(char *, struct keywordset *);
int parse_user_config(char *cptr, struct keywordset *keyset);
u_int64_t sizespec(char *spec);
int volume_index(struct volume *volume);
int plex_index(struct plex *plex);
int sd_index(struct sd *sd);
int drive_index(struct drive *drive);
int my_plex(int volno, int plexno);
int my_sd(int plexno, int sdno);
int get_empty_drive(void);
int find_drive(const char *name, int create);
int find_drive_by_dev(const char *devname, int create);
int get_empty_sd(void);
int find_subdisk(const char *name, int create);
void free_sd(int sdno);
void free_volume(int volno);
int get_empty_plex(void);
int find_plex(const char *name, int create);
void free_plex(int plexno);
int get_empty_volume(void);
int find_volume(const char *name, int create);
void config_subdisk(void);
void config_plex(void);
void config_volume(void);
void config_drive(void);
void updateconfig(int);
void update_sd_config(int sdno, int kernelstate);
void update_plex_config(int plexno, int kernelstate);
void update_volume_config(int volno, int kernelstate);
void update_config(void);
void drive_io_done(struct buf *);
int save_config(void);
void write_config(char *, int);
int start_config(void);
void finish_config(int);
void remove(struct vinum_ioctl_msg *msg);
void remove_drive_entry(int driveno, int force, int recurse);
void remove_sd_entry(int sdno, int force, int recurse);
void remove_plex_entry(int plexno, int force, int recurse);
void remove_volume_entry(int volno, int force, int recurse);

void checkernel(char *);
int open_drive(struct drive *, struct proc *);
void close_drive(struct drive *drive);
int driveio(struct drive *, void *, size_t, off_t, int);
/* #define read_drive(a, b, c, d) driveio (a, b, c, d, B_READ)
   #define write_drive(a, b, c, d) driveio (a, b, c, d, B_WRITE) */
int set_drive_parms(struct drive *drive);
int init_drive(struct drive *);
/* void throw_rude_remark (int, struct _ioctl_reply *, char *, ...); XXX */
void throw_rude_remark(int, char *,...);

int read_drive(struct drive *drive, void *buf, size_t length, off_t offset);
int write_drive(struct drive *drive, void *buf, size_t length, off_t offset);
void format_config(char *config, int len);
void checkkernel(char *op);
void free_drive(struct drive *drive);
void down_drive(struct drive *drive);
void remove_drive(int driveno);

/* I/O */
d_open_t vinumopen;
d_close_t vinumclose;
d_strategy_t vinumstrategy;
d_ioctl_t vinumioctl;
d_dump_t vinumdump;
d_psize_t vinumsize;
d_read_t vinumread;
d_write_t vinumwrite;

int vinumstart(struct buf *bp, int reviveok);
int launch_requests(struct request *rq, int reviveok);

/* XXX Do we need this? */
int vinumpart(dev_t);

/* Memory allocation */
void vinum_meminfo(caddr_t data);
int vinum_mallocinfo(caddr_t data);

void expand_table(void **, int, int);

void add_defective_region(struct plex *plex, off_t offset, size_t length);
void add_unmapped_region(struct plex *plex, off_t offset, size_t length);
void rebuild_plex_unmappedlist(struct plex *plex);
struct request;
struct rqgroup *allocrqg(struct request *rq, int elements);
void deallocrqg(struct rqgroup *rqg);

/* State transitions */
int set_drive_state(int driveno, enum drivestate state, int force);
int set_sd_state(int sdno, enum sdstate state, enum setstateflags flags);
enum requeststatus checksdstate(struct sd *sd, struct request *rq, daddr_t diskaddr, daddr_t diskend);
int set_plex_state(int plexno, enum plexstate state, enum setstateflags flags);
int set_volume_state(int volumeno, enum volumestate state, enum setstateflags flags);
void get_volume_label(struct volume *vol, struct disklabel *lp);
int write_volume_label(int);
void start_object(struct vinum_ioctl_msg *);
void stop_object(struct vinum_ioctl_msg *);
void setstate(struct vinum_ioctl_msg *msg);
void vinum_label(int);
int vinum_writedisklabel(struct volume *, struct disklabel *);
int initsd(int);

int restart_plex(int plexno);
int revive_block(int plexno);

/* Auxiliary functions */
enum sdstates sdstatemap(struct plex *plex, int *sddowncount);
enum volplexstate vpstate(struct plex *plex);
#endif

enum keyword get_keyword(char *, struct keywordset *);
void listconfig(void);
char *drive_state(enum drivestate);
char *volume_state(enum volumestate);
char *plex_state(enum plexstate);
char *plex_org(enum plexorg);
char *sd_state(enum sdstate);
enum drivestate DriveState(char *text);
enum sdstate SdState(char *text);
enum plexstate PlexState(char *text);
enum volumestate VolState(char *text);
struct drive *validdrive(int driveno, struct _ioctl_reply *);
struct sd *validsd(int sdno, struct _ioctl_reply *);
struct plex *validplex(int plexno, struct _ioctl_reply *);
struct volume *validvol(int volno, struct _ioctl_reply *);
int tokenize(char *, char *[]);
void resetstats(struct vinum_ioctl_msg *msg);

/* Locking */
int lockvol(struct volume *vol);
void unlockvol(struct volume *vol);
int lockplex(struct plex *plex);
void unlockplex(struct plex *plex);
int lockrange(struct plex *plex, off_t first, off_t last);
void unlockrange(struct plex *plex, off_t first, off_t last);
int lock_config(void);
void unlock_config(void);

#ifdef DEBUG
#define expandrq(prq) \
{  \
  expand_table ((void **) &prq->rqe, \
		prq->requests * sizeof (struct rqelement), \
		(prq->requests + RQELTS) * sizeof (struct rqelement) ); \
  bzero (&prq->rqe [prq->requests], RQELTS * sizeof (struct rqelement)); \
  prq->rqcount += RQELTS; \
  }
#else
void expandrq(struct plexrq *);
#endif