[thirdparty/mdadm.git] / mdadm.h

/*
 * mdadm - manage Linux "md" devices aka RAID arrays.
 *
 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
 *
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *    Author: Neil Brown
 *    Email: <neilb@cse.unsw.edu.au>
 *    Paper: Neil Brown
 *           School of Computer Science and Engineering
 *           The University of New South Wales
 *           Sydney, 2052
 *           Australia
 */

#define	_GNU_SOURCE
#include	<unistd.h>
#ifndef __dietlibc__
extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
#endif

#include	<sys/types.h>
#include	<sys/stat.h>
#include	<stdlib.h>
#include	<time.h>
#include	<sys/time.h>
#include	<getopt.h>
#include	<fcntl.h>
#include	<stdio.h>
#include	<errno.h>
#include	<string.h>
#include	<syslog.h>
#ifdef __dietlibc__NONO
int strncmp(const char *s1, const char *s2, size_t n) __THROW __pure__;
char *strncpy(char *dest, const char *src, size_t n) __THROW;
#include    <strings.h>
#endif


#include	<linux/kdev_t.h>
/*#include	<linux/fs.h> */
#include	<sys/mount.h>
#include	<asm/types.h>
#include	<sys/ioctl.h>
#define	MD_MAJOR 9
#define MdpMinorShift 6

#ifndef BLKGETSIZE64
#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
#endif

#define DEFAULT_BITMAP_CHUNK 4096
#define DEFAULT_BITMAP_DELAY 5
#define DEFAULT_MAX_WRITE_BEHIND 256

#include	"md_u.h"
#include	"md_p.h"
#include	"bitmap.h"

#include <endian.h>
/* #include "asm/byteorder.h" Redhat don't like this so... */
#if __BYTE_ORDER == __LITTLE_ENDIAN
#  include <linux/byteorder/little_endian.h>
#elif __BYTE_ORDER == __BIG_ENDIAN
#  include <linux/byteorder/big_endian.h>
#elif __BYTE_ORDER == __PDP_ENDIAN
#  include <linux/byteorder/pdp_endian.h>
#else
#  error "unknown endianness."
#endif


/* general information that might be extracted from a superblock */
struct mdinfo {
	mdu_array_info_t	array;
	mdu_disk_info_t		disk;
	__u64			events;
	int			uuid[4];
	char			name[33];
	unsigned long long	data_offset;
	unsigned long long	component_size;
	int			reshape_active;
	unsigned long long	reshape_progress;
	int			new_level, delta_disks, new_layout, new_chunk;
};

#define Name "mdadm"

enum mode {
	ASSEMBLE=1,
	BUILD,
	CREATE,
	MANAGE,
	MISC,
	MONITOR,
	GROW,
};

extern char short_options[];
extern char short_bitmap_auto_options[];
extern struct option long_options[];
extern char Version[], Usage[], Help[], OptionHelp[],
	Help_create[], Help_build[], Help_assemble[], Help_grow[],
	Help_manage[], Help_misc[], Help_monitor[], Help_config[];

/* structures read from config file */
/* List of mddevice names and identifiers
 * Identifiers can be:
 *    uuid=128-hex-uuid
 *    super-minor=decimal-minor-number-from-superblock
 *    devices=comma,separated,list,of,device,names,with,wildcards
 *
 * If multiple fields are present, the intersection of all matching
 * devices is considered
 */
#define UnSet (0xfffe)
typedef struct mddev_ident_s {
	char	*devname;
	
	int	uuid_set;
	int	uuid[4];
	char	name[33];

	unsigned int super_minor;

	char	*devices;	/* comma separated list of device
				 * names with wild cards
				 */
	int	level;
	unsigned int raid_disks;
	unsigned int spare_disks;
	struct supertype *st;
	int	autof;		/* 1 for normal, 2 for partitioned */
	char	*spare_group;
	char	*bitmap_file;
	int	bitmap_fd;

	struct mddev_ident_s *next;
} *mddev_ident_t;

/* List of device names - wildcards expanded */
typedef struct mddev_dev_s {
	char *devname;
	char disposition;	/* 'a' for add, 'r' for remove, 'f' for fail.
				 * Not set for names read from .config
				 */
	char writemostly;
	char re_add;
	struct mddev_dev_s *next;
} *mddev_dev_t;

typedef struct mapping {
	char *name;
	int num;
} mapping_t;


struct mdstat_ent {
	char		*dev;
	int		devnum;
	int		active;
	char		*level;
	char		*pattern; /* U or up, _ for down */
	int		percent; /* -1 if no resync */
	int		resync; /* 1 if resync, 0 if recovery */
	struct mdstat_ent *next;
};

extern struct mdstat_ent *mdstat_read(int hold, int start);
extern void free_mdstat(struct mdstat_ent *ms);
extern void mdstat_wait(int seconds);

/* Data structure for holding info read from sysfs */
struct sysdev {
	char	name[20];
	int	role;
	int	major, minor;
	unsigned long long offset, size;
	int	state;
	int	errors;
	struct sysdev *next;
};
struct sysarray {
	char	name[20];
	struct sysdev *devs;
	int	chunk;
	unsigned long long component_size;
	int	layout;
	int	level;
	int	spares;
};
/* various details can be requested */
#define	GET_LEVEL	1
#define	GET_LAYOUT	2
#define	GET_COMPONENT	4
#define	GET_CHUNK	8

#define	GET_DEVS	1024 /* gets role, major, minor */
#define	GET_OFFSET	2048
#define	GET_SIZE	4096
#define	GET_STATE	8192
#define	GET_ERROR	16384

/* If fd >= 0, get the array it is open on,
 * else use devnum. >=0 -> major9. <0.....
 */
extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
extern int sysfs_set_str(struct sysarray *sra, struct sysdev *dev,
			 char *name, char *val);
extern int sysfs_set_num(struct sysarray *sra, struct sysdev *dev,
			 char *name, unsigned long long val);
extern int sysfs_get_ll(struct sysarray *sra, struct sysdev *dev,
			char *name, unsigned long long *val);


extern int save_stripes(int *source, unsigned long long *offsets,
			int raid_disks, int chunk_size, int level, int layout,
			int nwrites, int *dest,
			unsigned long long start, unsigned long long length);
extern int restore_stripes(int *dest, unsigned long long *offsets,
			   int raid_disks, int chunk_size, int level, int layout,
			   int source, unsigned long long read_offset,
			   unsigned long long start, unsigned long long length);

#ifndef Sendmail
#define Sendmail "/usr/lib/sendmail -t"
#endif

#define SYSLOG_FACILITY LOG_DAEMON

extern char *map_num(mapping_t *map, int num);
extern int map_name(mapping_t *map, char *name);
extern mapping_t r5layout[], pers[], modes[], faultylayout[];

extern char *map_dev(int major, int minor, int create);


extern struct superswitch {
	void (*examine_super)(void *sbv);
	void (*brief_examine_super)(void *sbv);
	void (*detail_super)(void *sbv);
	void (*brief_detail_super)(void *sbv);
	void (*uuid_from_super)(int uuid[4], void *sbv);
	void (*getinfo_super)(struct mdinfo *info, void *sbv);
	int (*update_super)(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose);
	__u64 (*event_super)(void *sbv);
	int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name);
	void (*add_to_super)(void *sbv, mdu_disk_info_t *dinfo);
	int (*store_super)(struct supertype *st, int fd, void *sbv);
	int (*write_init_super)(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname);
	int (*compare_super)(void **firstp, void *secondv);
	int (*load_super)(struct supertype *st, int fd, void **sbp, char *devname);
	struct supertype * (*match_metadata_desc)(char *arg);
	__u64 (*avail_size)(struct supertype *st, __u64 size);
	int (*add_internal_bitmap)(struct supertype *st, void *sbv, int chunk, int delay, int write_behind,
				   unsigned long long size, int may_change, int major);
	void (*locate_bitmap)(struct supertype *st, int fd, void *sbv);
	int (*write_bitmap)(struct supertype *st, int fd, void *sbv);
	int major;
	int swapuuid; /* true if uuid is bigending rather than hostendian */
} super0, super1, *superlist[];

struct supertype {
	struct superswitch *ss;
	int minor_version;
	int max_devs;
};

extern struct supertype *super_by_version(int vers, int minor);
extern struct supertype *guess_super(int fd);

#if __GNUC__ < 3
struct stat64;
#endif

#ifdef UCLIBC
  struct FTW {};
# define FTW_PHYS 1
#else
# include <ftw.h>
# ifdef __dietlibc__
#  define FTW_PHYS 1
# endif
#endif

extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);


extern int Manage_ro(char *devname, int fd, int readonly);
extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
extern int Manage_reconfig(char *devname, int fd, int layout);
extern int Manage_subdevs(char *devname, int fd,
			  mddev_dev_t devlist, int verbose);
extern int Grow_Add_device(char *devname, int fd, char *newdev);
extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
			long long size,
			int level, int layout, int chunksize, int raid_disks);
extern int Grow_restart(struct supertype *st, struct mdinfo *info,
			int *fdlist, int cnt, char *backup_file);


extern int Assemble(struct supertype *st, char *mddev, int mdfd,
		    mddev_ident_t ident,
		    char *conffile,
		    mddev_dev_t devlist, char *backup_file,
		    int readonly, int runstop,
		    char *update,
		    int verbose, int force);

extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
		 int raiddisks,
		 mddev_dev_t devlist, int assume_clean,
		 char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);


extern int Create(struct supertype *st, char *mddev, int mdfd,
		  int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
		  char *name,
		  int subdevs, mddev_dev_t devlist,
		  int runstop, int verbose, int force, int assume_clean,
		  char *bitmap_file, int bitmap_chunk, int write_behind, int delay);

extern int Detail(char *dev, int brief, int test);
extern int Query(char *dev);
extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
		   struct supertype *forcest);
extern int Monitor(mddev_dev_t devlist,
		   char *mailaddr, char *alert_cmd,
		   int period, int daemonise, int scan, int oneshot,
		   int dosyslog, char *config, int test, char *pidfile);

extern int Kill(char *dev, int force, int quiet);

extern int CreateBitmap(char *filename, int force, char uuid[16],
			unsigned long chunksize, unsigned long daemon_sleep,
			unsigned long write_behind,
			unsigned long long array_size,
			int major);
extern int ExamineBitmap(char *filename, int brief, struct supertype *st);

extern int md_get_version(int fd);
extern int get_linux_version(void);
extern int parse_uuid(char *str, int uuid[4]);
extern int check_ext2(int fd, char *name);
extern int check_reiser(int fd, char *name);
extern int check_raid(int fd, char *name);

extern int get_mdp_major(void);
extern int dev_open(char *dev, int flags);
extern int is_standard(char *dev, int *nump);


extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
extern mddev_dev_t conf_get_devs(char *conffile);
extern char *conf_get_mailaddr(char *conffile);
extern char *conf_get_program(char *conffile);
extern char *conf_line(FILE *file);
extern char *conf_word(FILE *file, int allow_key);
extern void free_line(char *line);
extern int match_oneof(char *devices, char *devname);
extern void uuid_from_super(int uuid[4], mdp_super_t *super);
extern int same_uuid(int a[4], int b[4], int swapuuid);
/* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/
extern unsigned long calc_csum(void *super, int bytes);
extern int enough(int level, int raid_disks, int layout,
		   char *avail, int avail_disks);
extern int ask(char *mesg);
extern unsigned long long get_component_size(int fd);


extern char *human_size(long long bytes);
char *human_size_brief(long long bytes);

extern void put_md_name(char *name);
extern char *get_md_name(int dev);

extern char DefaultConfFile[];

extern int open_mddev(char *dev, int autof);


#define	LEVEL_MULTIPATH		(-4)
#define	LEVEL_LINEAR		(-1)
#define	LEVEL_FAULTY		(-5)


/* faulty stuff */

#define	WriteTransient	0
#define	ReadTransient	1
#define	WritePersistent	2
#define	ReadPersistent	3
#define	WriteAll	4 /* doesn't go to device */
#define	ReadFixable	5
#define	Modes	6

#define	ClearErrors	31
#define	ClearFaults	30

#define AllPersist	100 /* internal use only */
#define	NoPersist	101

#define	ModeMask	0x1f
#define	ModeShift	5


#ifdef __TINYC__
#undef minor
#undef major
#undef makedev
#define minor(x) ((x)&0xff)
#define major(x) (((x)>>8)&0xff)
#define makedev(M,m) (((M)<<8) | (m))
#endif

/* for raid5 */
#define ALGORITHM_LEFT_ASYMMETRIC	0
#define ALGORITHM_RIGHT_ASYMMETRIC	1
#define ALGORITHM_LEFT_SYMMETRIC	2
#define ALGORITHM_RIGHT_SYMMETRIC	3
Commit	Line	Data
64c4757e	1	/*
9a9dab36	2	* mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e	3	*
cd29a5c8	4	* Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
64c4757e NB	5	*
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	* Author: Neil Brown
	22	* Email: <neilb@cse.unsw.edu.au>
	23	* Paper: Neil Brown
	24	* School of Computer Science and Engineering
	25	* The University of New South Wales
	26	* Sydney, 2052
	27	* Australia
	28	*/
	29
4ccdb956	30	#define _GNU_SOURCE
64c4757e	31	#include <unistd.h>
98c6faba	32	#ifndef __dietlibc__
64c4757e	33	extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
98c6faba	34	#endif
64c4757e NB	35
	36	#include <sys/types.h>
	37	#include <sys/stat.h>
	38	#include <stdlib.h>
	39	#include <time.h>
11018a45	40	#include <sys/time.h>
64c4757e NB	41	#include <getopt.h>
	42	#include <fcntl.h>
	43	#include <stdio.h>
	44	#include <errno.h>
	45	#include <string.h>
773135f5	46	#include <syslog.h>
98c6faba NB	47	#ifdef __dietlibc__NONO
	48	int strncmp(const char s1, const char s2, size_t n) __THROW __pure__;
	49	char strncpy(char dest, const char *src, size_t n) __THROW;
	50	#include <strings.h>
	51	#endif
	52
64c4757e NB	53
64c4757e NB	54	#include <linux/kdev_t.h>
e0d19036 NB	55	/#include <linux/fs.h> /
	56	#include <sys/mount.h>
	57	#include <asm/types.h>
64c4757e NB	58	#include <sys/ioctl.h>
64c4757e NB	59	#define MD_MAJOR 9
dd0781e5	60	#define MdpMinorShift 6
64c4757e	61
e0d19036	62	#ifndef BLKGETSIZE64
98c6faba	63	#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 arg) /
e0d19036	64	#endif
56eb10c0	65
c82f047c NB	66	#define DEFAULT_BITMAP_CHUNK 4096
c82f047c NB	67	#define DEFAULT_BITMAP_DELAY 5
dfd4d8ee	68	#define DEFAULT_MAX_WRITE_BEHIND 256
64c4757e NB	69
64c4757e NB	70	#include "md_u.h"
e0d19036	71	#include "md_p.h"
c82f047c	72	#include "bitmap.h"
64c4757e	73
1e0d770c NB	74	#include <endian.h>
	75	/* #include "asm/byteorder.h" Redhat don't like this so... */
	76	#if __BYTE_ORDER == __LITTLE_ENDIAN
	77	# include <linux/byteorder/little_endian.h>
	78	#elif __BYTE_ORDER == __BIG_ENDIAN
	79	# include <linux/byteorder/big_endian.h>
	80	#elif __BYTE_ORDER == __PDP_ENDIAN
	81	# include <linux/byteorder/pdp_endian.h>
	82	#else
	83	# error "unknown endianness."
	84	#endif
	85
	86
	87
4b1ac34b NB	88	/* general information that might be extracted from a superblock */
	89	struct mdinfo {
	90	mdu_array_info_t array;
	91	mdu_disk_info_t disk;
	92	__u64 events;
fbf8a0b7	93	int uuid[4];
31317663	94	char name[33];
353632d9 NB	95	unsigned long long data_offset;
	96	unsigned long long component_size;
	97	int reshape_active;
	98	unsigned long long reshape_progress;
	99	int new_level, delta_disks, new_layout, new_chunk;
4b1ac34b NB	100	};
4b1ac34b NB	101
9a9dab36	102	#define Name "mdadm"
682c7051	103
e0d19036 NB	104	enum mode {
	105	ASSEMBLE=1,
	106	BUILD,
	107	CREATE,
	108	MANAGE,
	109	MISC,
	110	MONITOR,
dd0781e5	111	GROW,
e0d19036 NB	112	};
e0d19036 NB	113
64c4757e	114	extern char short_options[];
c06487ce	115	extern char short_bitmap_auto_options[];
64c4757e	116	extern struct option long_options[];
56eedc1a	117	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	118	Help_create[], Help_build[], Help_assemble[], Help_grow[],
e0d19036	119	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e NB	120
64c4757e NB	121	/* structures read from config file */
52826846 NB	122	/* List of mddevice names and identifiers
	123	* Identifiers can be:
	124	* uuid=128-hex-uuid
	125	* super-minor=decimal-minor-number-from-superblock
	126	* devices=comma,separated,list,of,device,names,with,wildcards
	127	*
	128	* If multiple fields are present, the intersection of all matching
	129	* devices is considered
	130	*/
98c6faba	131	#define UnSet (0xfffe)
52826846	132	typedef struct mddev_ident_s {
dd0781e5	133	char *devname;
52826846	134
dd0781e5	135	int uuid_set;
3fa06e9d	136	int uuid[4];
947fd4dd	137	char name[33];
52826846	138
98c6faba	139	unsigned int super_minor;
52826846	140
dd0781e5	141	char devices; / comma separated list of device
52826846 NB	142	* names with wild cards
52826846 NB	143	*/
dd0781e5	144	int level;
98c6faba NB	145	unsigned int raid_disks;
98c6faba NB	146	unsigned int spare_disks;
82d9eba6	147	struct supertype *st;
dd0781e5 NB	148	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	149	char *spare_group;
7ef02d01	150	char *bitmap_file;
c82f047c	151	int bitmap_fd;
dd0781e5	152
52826846 NB	153	struct mddev_ident_s *next;
52826846 NB	154	} *mddev_ident_t;
64c4757e NB	155
	156	/* List of device names - wildcards expanded */
	157	typedef struct mddev_dev_s {
	158	char *devname;
cd29a5c8 NB	159	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	160	* Not set for names read from .config
	161	*/
dfd4d8ee	162	char writemostly;
fe80f49b	163	char re_add;
64c4757e NB	164	struct mddev_dev_s *next;
	165	} *mddev_dev_t;
	166
682c7051 NB	167	typedef struct mapping {
	168	char *name;
	169	int num;
	170	} mapping_t;
	171
e0d19036 NB	172
	173	struct mdstat_ent {
	174	char *dev;
	175	int devnum;
	176	int active;
	177	char *level;
	178	char pattern; / U or up, _ for down */
	179	int percent; /* -1 if no resync */
e5329c37	180	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	181	struct mdstat_ent *next;
	182	};
	183
22a88995	184	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	185	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	186	extern void mdstat_wait(int seconds);
e0d19036	187
e86c9dd6 NB	188	/* Data structure for holding info read from sysfs */
	189	struct sysdev {
	190	char name[20];
	191	int role;
	192	int major, minor;
	193	unsigned long long offset, size;
	194	int state;
	195	int errors;
	196	struct sysdev *next;
	197	};
	198	struct sysarray {
	199	char name[20];
	200	struct sysdev *devs;
	201	int chunk;
	202	unsigned long long component_size;
	203	int layout;
	204	int level;
	205	int spares;
	206	};
	207	/* various details can be requested */
	208	#define GET_LEVEL 1
	209	#define GET_LAYOUT 2
	210	#define GET_COMPONENT 4
	211	#define GET_CHUNK 8
	212
	213	#define GET_DEVS 1024 /* gets role, major, minor */
	214	#define GET_OFFSET 2048
	215	#define GET_SIZE 4096
	216	#define GET_STATE 8192
	217	#define GET_ERROR 16384
	218
	219	/* If fd >= 0, get the array it is open on,
	220	* else use devnum. >=0 -> major9. <0.....
	221	*/
	222	extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
	223	extern int sysfs_set_str(struct sysarray sra, struct sysdev dev,
	224	char name, char val);
	225	extern int sysfs_set_num(struct sysarray sra, struct sysdev dev,
	226	char *name, unsigned long long val);
	227	extern int sysfs_get_ll(struct sysarray sra, struct sysdev dev,
	228	char name, unsigned long long val);
	229
	230
	231	extern int save_stripes(int source, unsigned long long offsets,
	232	int raid_disks, int chunk_size, int level, int layout,
	233	int nwrites, int *dest,
	234	unsigned long long start, unsigned long long length);
353632d9 NB	235	extern int restore_stripes(int dest, unsigned long long offsets,
	236	int raid_disks, int chunk_size, int level, int layout,
	237	int source, unsigned long long read_offset,
	238	unsigned long long start, unsigned long long length);
e86c9dd6	239
52826846 NB	240	#ifndef Sendmail
	241	#define Sendmail "/usr/lib/sendmail -t"
	242	#endif
	243
773135f5 NB	244	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	245
682c7051 NB	246	extern char map_num(mapping_t map, int num);
682c7051 NB	247	extern int map_name(mapping_t map, char name);
b5e64645	248	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	249
16c6fa80	250	extern char *map_dev(int major, int minor, int create);
64c4757e NB	251
64c4757e NB	252
f9ce90ba NB	253	extern struct superswitch {
	254	void (examine_super)(void sbv);
	255	void (brief_examine_super)(void sbv);
	256	void (detail_super)(void sbv);
	257	void (brief_detail_super)(void sbv);
	258	void (uuid_from_super)(int uuid[4], void sbv);
31317663	259	void (getinfo_super)(struct mdinfo info, void *sbv);
f9ce90ba NB	260	int (update_super)(struct mdinfo info, void sbv, char update, char *devname, int verbose);
f9ce90ba NB	261	__u64 (event_super)(void sbv);
5dd497ee	262	int (init_super)(struct supertype st, void *sbp, mdu_array_info_t info, unsigned long long size, char *name);
f9ce90ba	263	void (add_to_super)(void sbv, mdu_disk_info_t *dinfo);
96395475	264	int (store_super)(struct supertype st, int fd, void *sbv);
1bf4e2d9	265	int (write_init_super)(struct supertype st, void sbv, mdu_disk_info_t dinfo, char *devname);
f9ce90ba	266	int (compare_super)(void firstp, void secondv);
82d9eba6 NB	267	int (load_super)(struct supertype st, int fd, void *sbp, char devname);
82d9eba6 NB	268	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	269	__u64 (avail_size)(struct supertype st, __u64 size);
f9c25f1d NB	270	int (add_internal_bitmap)(struct supertype st, void *sbv, int chunk, int delay, int write_behind,
f9c25f1d NB	271	unsigned long long size, int may_change, int major);
f6d75de8	272	void (locate_bitmap)(struct supertype st, int fd, void *sbv);
f5e166fe	273	int (write_bitmap)(struct supertype st, int fd, void *sbv);
82d9eba6	274	int major;
f277ce36	275	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	276	} super0, super1, *superlist[];
	277
	278	struct supertype {
	279	struct superswitch *ss;
	280	int minor_version;
ea329559	281	int max_devs;
82d9eba6	282	};
f9ce90ba	283
82d9eba6 NB	284	extern struct supertype *super_by_version(int vers, int minor);
82d9eba6 NB	285	extern struct supertype *guess_super(int fd);
f9ce90ba	286
838acbc2 NB	287	#if __GNUC__ < 3
	288	struct stat64;
	289	#endif
	290
173fc515 NB	291	#ifdef UCLIBC
	292	struct FTW {};
	293	# define FTW_PHYS 1
	294	#else
173fc515 NB	295	# include <ftw.h>
	296	# ifdef __dietlibc__
	297	# define FTW_PHYS 1
	298	# endif
	299	#endif
	300
	301	extern int add_dev(const char name, const struct stat stb, int flag, struct FTW *s);
	302
f9ce90ba	303
64c4757e	304	extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf	305	extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5	306	extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645	307	extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e	308	extern int Manage_subdevs(char *devname, int fd,
dab6685f	309	mddev_dev_t devlist, int verbose);
e5329c37	310	extern int Grow_Add_device(char devname, int fd, char newdev);
8fac0577	311	extern int Grow_addbitmap(char devname, int fd, char file, int chunk, int delay, int write_behind, int force);
06b0d786	312	extern int Grow_reshape(char devname, int fd, int quiet, char backup_file,
e86c9dd6 NB	313	long long size,
e86c9dd6 NB	314	int level, int layout, int chunksize, int raid_disks);
06b0d786 NB	315	extern int Grow_restart(struct supertype st, struct mdinfo info,
06b0d786 NB	316	int fdlist, int cnt, char backup_file);
64c4757e NB	317
64c4757e NB	318
82d9eba6	319	extern int Assemble(struct supertype st, char mddev, int mdfd,
52826846 NB	320	mddev_ident_t ident,
52826846 NB	321	char *conffile,
06b0d786	322	mddev_dev_t devlist, char *backup_file,
64c4757e	323	int readonly, int runstop,
5787fa49	324	char *update,
64c4757e NB	325	int verbose, int force);
64c4757e NB	326
b5e64645	327	extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e	328	int raiddisks,
c82f047c	329	mddev_dev_t devlist, int assume_clean,
dab6685f	330	char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e NB	331
64c4757e NB	332
82d9eba6	333	extern int Create(struct supertype st, char mddev, int mdfd,
5dd497ee	334	int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
947fd4dd	335	char *name,
cd29a5c8	336	int subdevs, mddev_dev_t devlist,
47d79ef8	337	int runstop, int verbose, int force, int assume_clean,
dfd4d8ee	338	char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e	339
feb716e9	340	extern int Detail(char *dev, int brief, int test);
e0d19036	341	extern int Query(char *dev);
82d9eba6 NB	342	extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
82d9eba6 NB	343	struct supertype *forcest);
cd29a5c8	344	extern int Monitor(mddev_dev_t devlist,
e0d19036	345	char mailaddr, char alert_cmd,
aa88f531	346	int period, int daemonise, int scan, int oneshot,
773135f5	347	int dosyslog, char config, int test, char pidfile);
64c4757e	348
6409687b	349	extern int Kill(char *dev, int force, int quiet);
9a9dab36	350
c82f047c NB	351	extern int CreateBitmap(char *filename, int force, char uuid[16],
c82f047c NB	352	unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee	353	unsigned long write_behind,
dcec9ee5 NB	354	unsigned long long array_size,
dcec9ee5 NB	355	int major);
55935d51	356	extern int ExamineBitmap(char filename, int brief, struct supertype st);
c82f047c	357
64c4757e	358	extern int md_get_version(int fd);
e0d19036	359	extern int get_linux_version(void);
64c4757e	360	extern int parse_uuid(char *str, int uuid[4]);
682c7051 NB	361	extern int check_ext2(int fd, char *name);
	362	extern int check_reiser(int fd, char *name);
	363	extern int check_raid(int fd, char *name);
64c4757e	364
dd0781e5	365	extern int get_mdp_major(void);
8b0dabea	366	extern int dev_open(char *dev, int flags);
8d80900b	367	extern int is_standard(char dev, int nump);
dd0781e5 NB	368
dd0781e5 NB	369
e0d19036 NB	370	extern mddev_ident_t conf_get_ident(char conffile, char dev);
	371	extern mddev_dev_t conf_get_devs(char *conffile);
	372	extern char conf_get_mailaddr(char conffile);
	373	extern char conf_get_program(char conffile);
	374	extern char conf_line(FILE file);
98c6faba	375	extern char conf_word(FILE file, int allow_key);
e0d19036 NB	376	extern void free_line(char *line);
e0d19036 NB	377	extern int match_oneof(char devices, char devname);
e0d19036	378	extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36	379	extern int same_uuid(int a[4], int b[4], int swapuuid);
4b1ac34b NB	380	/* extern int compare_super(mdp_super_t first, mdp_super_t second);*/
4b1ac34b NB	381	extern unsigned long calc_csum(void *super, int bytes);
265e0f17 NB	382	extern int enough(int level, int raid_disks, int layout,
265e0f17 NB	383	char *avail, int avail_disks);
e0d19036	384	extern int ask(char *mesg);
8fac0577	385	extern unsigned long long get_component_size(int fd);
e0d19036	386
cd29a5c8	387
56eb10c0	388	extern char *human_size(long long bytes);
e0d19036 NB	389	char *human_size_brief(long long bytes);
	390
	391	extern void put_md_name(char *name);
	392	extern char *get_md_name(int dev);
	393
c913b90e	394	extern char DefaultConfFile[];
b5e64645 NB	395
	396	extern int open_mddev(char *dev, int autof);
	397
	398
	399	#define LEVEL_MULTIPATH (-4)
	400	#define LEVEL_LINEAR (-1)
	401	#define LEVEL_FAULTY (-5)
	402
	403
	404	/* faulty stuff */
	405
	406	#define WriteTransient 0
	407	#define ReadTransient 1
	408	#define WritePersistent 2
	409	#define ReadPersistent 3
	410	#define WriteAll 4 /* doesn't go to device */
	411	#define ReadFixable 5
	412	#define Modes 6
	413
	414	#define ClearErrors 31
	415	#define ClearFaults 30
	416
	417	#define AllPersist 100 /* internal use only */
	418	#define NoPersist 101
	419
	420	#define ModeMask 0x1f
	421	#define ModeShift 5
fe6729fa NB	422
	423
	424	#ifdef __TINYC__
	425	#undef minor
	426	#undef major
	427	#undef makedev
	428	#define minor(x) ((x)&0xff)
	429	#define major(x) (((x)>>8)&0xff)
	430	#define makedev(M,m) (((M)<<8) \| (m))
	431	#endif
	432
e86c9dd6 NB	433	/* for raid5 */
	434	#define ALGORITHM_LEFT_ASYMMETRIC 0
	435	#define ALGORITHM_RIGHT_ASYMMETRIC 1
	436	#define ALGORITHM_LEFT_SYMMETRIC 2
	437	#define ALGORITHM_RIGHT_SYMMETRIC 3