[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	__USE_LARGEFILE64
#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];
	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;
	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);


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, mddev_ident_t ident, 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
# define  __USE_XOPEN_EXTENDED
# 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,
			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);


extern int Assemble(struct supertype *st, char *mddev, int mdfd,
		    mddev_ident_t ident,
		    char *conffile,
		    mddev_dev_t devlist,
		    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);

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
	30	#define __USE_LARGEFILE64
	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];
353632d9 NB	94	unsigned long long data_offset;
	95	unsigned long long component_size;
	96	int reshape_active;
	97	unsigned long long reshape_progress;
	98	int new_level, delta_disks, new_layout, new_chunk;
4b1ac34b NB	99	};
4b1ac34b NB	100
9a9dab36	101	#define Name "mdadm"
682c7051	102
e0d19036 NB	103	enum mode {
	104	ASSEMBLE=1,
	105	BUILD,
	106	CREATE,
	107	MANAGE,
	108	MISC,
	109	MONITOR,
dd0781e5	110	GROW,
e0d19036 NB	111	};
e0d19036 NB	112
64c4757e	113	extern char short_options[];
c06487ce	114	extern char short_bitmap_auto_options[];
64c4757e	115	extern struct option long_options[];
56eedc1a	116	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	117	Help_create[], Help_build[], Help_assemble[], Help_grow[],
e0d19036	118	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e NB	119
64c4757e NB	120	/* structures read from config file */
52826846 NB	121	/* List of mddevice names and identifiers
	122	* Identifiers can be:
	123	* uuid=128-hex-uuid
	124	* super-minor=decimal-minor-number-from-superblock
	125	* devices=comma,separated,list,of,device,names,with,wildcards
	126	*
	127	* If multiple fields are present, the intersection of all matching
	128	* devices is considered
	129	*/
98c6faba	130	#define UnSet (0xfffe)
52826846	131	typedef struct mddev_ident_s {
dd0781e5	132	char *devname;
52826846	133
dd0781e5	134	int uuid_set;
3fa06e9d	135	int uuid[4];
947fd4dd	136	char name[33];
52826846	137
98c6faba	138	unsigned int super_minor;
52826846	139
dd0781e5	140	char devices; / comma separated list of device
52826846 NB	141	* names with wild cards
52826846 NB	142	*/
dd0781e5	143	int level;
98c6faba NB	144	unsigned int raid_disks;
98c6faba NB	145	unsigned int spare_disks;
82d9eba6	146	struct supertype *st;
dd0781e5 NB	147	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	148	char *spare_group;
c82f047c	149	int bitmap_fd;
dd0781e5	150
52826846 NB	151	struct mddev_ident_s *next;
52826846 NB	152	} *mddev_ident_t;
64c4757e NB	153
	154	/* List of device names - wildcards expanded */
	155	typedef struct mddev_dev_s {
	156	char *devname;
cd29a5c8 NB	157	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	158	* Not set for names read from .config
	159	*/
dfd4d8ee	160	char writemostly;
fe80f49b	161	char re_add;
64c4757e NB	162	struct mddev_dev_s *next;
	163	} *mddev_dev_t;
	164
682c7051 NB	165	typedef struct mapping {
	166	char *name;
	167	int num;
	168	} mapping_t;
	169
e0d19036 NB	170
	171	struct mdstat_ent {
	172	char *dev;
	173	int devnum;
	174	int active;
	175	char *level;
	176	char pattern; / U or up, _ for down */
	177	int percent; /* -1 if no resync */
e5329c37	178	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	179	struct mdstat_ent *next;
	180	};
	181
22a88995	182	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	183	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	184	extern void mdstat_wait(int seconds);
e0d19036	185
e86c9dd6 NB	186	/* Data structure for holding info read from sysfs */
	187	struct sysdev {
	188	char name[20];
	189	int role;
	190	int major, minor;
	191	unsigned long long offset, size;
	192	int state;
	193	int errors;
	194	struct sysdev *next;
	195	};
	196	struct sysarray {
	197	char name[20];
	198	struct sysdev *devs;
	199	int chunk;
	200	unsigned long long component_size;
	201	int layout;
	202	int level;
	203	int spares;
	204	};
	205	/* various details can be requested */
	206	#define GET_LEVEL 1
	207	#define GET_LAYOUT 2
	208	#define GET_COMPONENT 4
	209	#define GET_CHUNK 8
	210
	211	#define GET_DEVS 1024 /* gets role, major, minor */
	212	#define GET_OFFSET 2048
	213	#define GET_SIZE 4096
	214	#define GET_STATE 8192
	215	#define GET_ERROR 16384
	216
	217	/* If fd >= 0, get the array it is open on,
	218	* else use devnum. >=0 -> major9. <0.....
	219	*/
	220	extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
	221	extern int sysfs_set_str(struct sysarray sra, struct sysdev dev,
	222	char name, char val);
	223	extern int sysfs_set_num(struct sysarray sra, struct sysdev dev,
	224	char *name, unsigned long long val);
	225	extern int sysfs_get_ll(struct sysarray sra, struct sysdev dev,
	226	char name, unsigned long long val);
	227
	228
	229	extern int save_stripes(int source, unsigned long long offsets,
	230	int raid_disks, int chunk_size, int level, int layout,
	231	int nwrites, int *dest,
	232	unsigned long long start, unsigned long long length);
353632d9 NB	233	extern int restore_stripes(int dest, unsigned long long offsets,
	234	int raid_disks, int chunk_size, int level, int layout,
	235	int source, unsigned long long read_offset,
	236	unsigned long long start, unsigned long long length);
e86c9dd6	237
52826846 NB	238	#ifndef Sendmail
	239	#define Sendmail "/usr/lib/sendmail -t"
	240	#endif
	241
773135f5 NB	242	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	243
682c7051 NB	244	extern char map_num(mapping_t map, int num);
682c7051 NB	245	extern int map_name(mapping_t map, char name);
b5e64645	246	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	247
82b27616	248	extern char *map_dev(int major, int minor);
64c4757e NB	249
64c4757e NB	250
f9ce90ba NB	251	extern struct superswitch {
	252	void (examine_super)(void sbv);
	253	void (brief_examine_super)(void sbv);
	254	void (detail_super)(void sbv);
	255	void (brief_detail_super)(void sbv);
	256	void (uuid_from_super)(int uuid[4], void sbv);
947fd4dd	257	void (getinfo_super)(struct mdinfo info, mddev_ident_t ident, void *sbv);
f9ce90ba NB	258	int (update_super)(struct mdinfo info, void sbv, char update, char *devname, int verbose);
f9ce90ba NB	259	__u64 (event_super)(void sbv);
5dd497ee	260	int (init_super)(struct supertype st, void *sbp, mdu_array_info_t info, unsigned long long size, char *name);
f9ce90ba	261	void (add_to_super)(void sbv, mdu_disk_info_t *dinfo);
96395475	262	int (store_super)(struct supertype st, int fd, void *sbv);
1bf4e2d9	263	int (write_init_super)(struct supertype st, void sbv, mdu_disk_info_t dinfo, char *devname);
f9ce90ba	264	int (compare_super)(void firstp, void secondv);
82d9eba6 NB	265	int (load_super)(struct supertype st, int fd, void *sbp, char devname);
82d9eba6 NB	266	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	267	__u64 (avail_size)(struct supertype st, __u64 size);
f9c25f1d NB	268	int (add_internal_bitmap)(struct supertype st, void *sbv, int chunk, int delay, int write_behind,
f9c25f1d NB	269	unsigned long long size, int may_change, int major);
f6d75de8	270	void (locate_bitmap)(struct supertype st, int fd, void *sbv);
f5e166fe	271	int (write_bitmap)(struct supertype st, int fd, void *sbv);
82d9eba6	272	int major;
f277ce36	273	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	274	} super0, super1, *superlist[];
	275
	276	struct supertype {
	277	struct superswitch *ss;
	278	int minor_version;
ea329559	279	int max_devs;
82d9eba6	280	};
f9ce90ba	281
82d9eba6 NB	282	extern struct supertype *super_by_version(int vers, int minor);
82d9eba6 NB	283	extern struct supertype *guess_super(int fd);
f9ce90ba	284
838acbc2 NB	285	#if __GNUC__ < 3
	286	struct stat64;
	287	#endif
	288
173fc515 NB	289	#ifdef UCLIBC
	290	struct FTW {};
	291	# define FTW_PHYS 1
	292	#else
	293	# define __USE_XOPEN_EXTENDED
	294	# include <ftw.h>
	295	# ifdef __dietlibc__
	296	# define FTW_PHYS 1
	297	# endif
	298	#endif
	299
	300	extern int add_dev(const char name, const struct stat stb, int flag, struct FTW *s);
	301
f9ce90ba	302
64c4757e	303	extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf	304	extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5	305	extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645	306	extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e	307	extern int Manage_subdevs(char *devname, int fd,
dab6685f	308	mddev_dev_t devlist, int verbose);
e5329c37	309	extern int Grow_Add_device(char devname, int fd, char newdev);
8fac0577	310	extern int Grow_addbitmap(char devname, int fd, char file, int chunk, int delay, int write_behind, int force);
e86c9dd6 NB	311	extern int Grow_reshape(char *devname, int fd, int quiet,
	312	long long size,
	313	int level, int layout, int chunksize, int raid_disks);
353632d9	314	extern int Grow_restart(struct supertype st, struct mdinfo info, int *fdlist, int cnt);
64c4757e NB	315
64c4757e NB	316
82d9eba6	317	extern int Assemble(struct supertype st, char mddev, int mdfd,
52826846 NB	318	mddev_ident_t ident,
52826846 NB	319	char *conffile,
cd29a5c8	320	mddev_dev_t devlist,
64c4757e	321	int readonly, int runstop,
5787fa49	322	char *update,
64c4757e NB	323	int verbose, int force);
64c4757e NB	324
b5e64645	325	extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e	326	int raiddisks,
c82f047c	327	mddev_dev_t devlist, int assume_clean,
dab6685f	328	char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e NB	329
64c4757e NB	330
82d9eba6	331	extern int Create(struct supertype st, char mddev, int mdfd,
5dd497ee	332	int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
947fd4dd	333	char *name,
cd29a5c8	334	int subdevs, mddev_dev_t devlist,
47d79ef8	335	int runstop, int verbose, int force, int assume_clean,
dfd4d8ee	336	char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e	337
feb716e9	338	extern int Detail(char *dev, int brief, int test);
e0d19036	339	extern int Query(char *dev);
82d9eba6 NB	340	extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
82d9eba6 NB	341	struct supertype *forcest);
cd29a5c8	342	extern int Monitor(mddev_dev_t devlist,
e0d19036	343	char mailaddr, char alert_cmd,
aa88f531	344	int period, int daemonise, int scan, int oneshot,
773135f5	345	int dosyslog, char config, int test, char pidfile);
64c4757e	346
9a9dab36 NB	347	extern int Kill(char *dev, int force);
9a9dab36 NB	348
c82f047c NB	349	extern int CreateBitmap(char *filename, int force, char uuid[16],
c82f047c NB	350	unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee	351	unsigned long write_behind,
dcec9ee5 NB	352	unsigned long long array_size,
dcec9ee5 NB	353	int major);
55935d51	354	extern int ExamineBitmap(char filename, int brief, struct supertype st);
c82f047c	355
64c4757e	356	extern int md_get_version(int fd);
e0d19036	357	extern int get_linux_version(void);
64c4757e	358	extern int parse_uuid(char *str, int uuid[4]);
682c7051 NB	359	extern int check_ext2(int fd, char *name);
	360	extern int check_reiser(int fd, char *name);
	361	extern int check_raid(int fd, char *name);
64c4757e	362
dd0781e5	363	extern int get_mdp_major(void);
8b0dabea	364	extern int dev_open(char *dev, int flags);
8d80900b	365	extern int is_standard(char dev, int nump);
dd0781e5 NB	366
dd0781e5 NB	367
e0d19036 NB	368	extern mddev_ident_t conf_get_ident(char conffile, char dev);
	369	extern mddev_dev_t conf_get_devs(char *conffile);
	370	extern char conf_get_mailaddr(char conffile);
	371	extern char conf_get_program(char conffile);
	372	extern char conf_line(FILE file);
98c6faba	373	extern char conf_word(FILE file, int allow_key);
e0d19036 NB	374	extern void free_line(char *line);
e0d19036 NB	375	extern int match_oneof(char devices, char devname);
e0d19036	376	extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36	377	extern int same_uuid(int a[4], int b[4], int swapuuid);
4b1ac34b NB	378	/* extern int compare_super(mdp_super_t first, mdp_super_t second);*/
4b1ac34b NB	379	extern unsigned long calc_csum(void *super, int bytes);
265e0f17 NB	380	extern int enough(int level, int raid_disks, int layout,
265e0f17 NB	381	char *avail, int avail_disks);
e0d19036	382	extern int ask(char *mesg);
8fac0577	383	extern unsigned long long get_component_size(int fd);
e0d19036	384
cd29a5c8	385
56eb10c0	386	extern char *human_size(long long bytes);
e0d19036 NB	387	char *human_size_brief(long long bytes);
	388
	389	extern void put_md_name(char *name);
	390	extern char *get_md_name(int dev);
	391
c913b90e	392	extern char DefaultConfFile[];
b5e64645 NB	393
	394	extern int open_mddev(char *dev, int autof);
	395
	396
	397	#define LEVEL_MULTIPATH (-4)
	398	#define LEVEL_LINEAR (-1)
	399	#define LEVEL_FAULTY (-5)
	400
	401
	402	/* faulty stuff */
	403
	404	#define WriteTransient 0
	405	#define ReadTransient 1
	406	#define WritePersistent 2
	407	#define ReadPersistent 3
	408	#define WriteAll 4 /* doesn't go to device */
	409	#define ReadFixable 5
	410	#define Modes 6
	411
	412	#define ClearErrors 31
	413	#define ClearFaults 30
	414
	415	#define AllPersist 100 /* internal use only */
	416	#define NoPersist 101
	417
	418	#define ModeMask 0x1f
	419	#define ModeShift 5
fe6729fa NB	420
	421
	422	#ifdef __TINYC__
	423	#undef minor
	424	#undef major
	425	#undef makedev
	426	#define minor(x) ((x)&0xff)
	427	#define major(x) (((x)>>8)&0xff)
	428	#define makedev(M,m) (((M)<<8) \| (m))
	429	#endif
	430
e86c9dd6 NB	431	/* for raid5 */
	432	#define ALGORITHM_LEFT_ASYMMETRIC 0
	433	#define ALGORITHM_RIGHT_ASYMMETRIC 1
	434	#define ALGORITHM_LEFT_SYMMETRIC 2
	435	#define ALGORITHM_RIGHT_SYMMETRIC 3