[thirdparty/mdadm.git] / mdadm.h

/*
 * mdadm - manage Linux "md" devices aka RAID arrays.
 *
 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
 *
 *
 *    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__
#include	<strings.h>
/* dietlibc has deprecated random and srandom!! */
#define random rand
#define srandom srand
#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;
};

struct createinfo {
	int	uid;
	int	gid;
	int	autof;
	int	mode;
};

#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[];

/* for option that don't have short equivilents, we assign arbitrary
 * small numbers.  '1' means an undecorated option, so we start at '2'.
 */
enum special_options {
	AssumeClean = 2,
	BitmapChunk,
	WriteBehind,
	ReAdd,
	NoDegraded,
	Sparc22,
	BackupFile,
	HomeHost,
	AutoHomeHost,
};

/* 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;
	char used;		/* set when used */
	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, char *homehost);
	void (*brief_examine_super)(void *sbv);
	void (*detail_super)(void *sbv, char *homehost);
	void (*brief_detail_super)(void *sbv);
	void (*uuid_from_super)(int uuid[4], void *sbv);
	void (*getinfo_super)(struct mdinfo *info, void *sbv);
	int (*match_home)(void *sbv, char *homehost);
	int (*update_super)(struct mdinfo *info, void *sbv, char *update,
			    char *devname, int verbose,
			    int uuid_set, char *homehost);
	__u64 (*event_super)(void *sbv);
	int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name, char *homehost);
	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, char *homehost,
		    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, char *homehost,
		  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, char *homehost);
extern int Query(char *dev);
extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
		   struct supertype *forcest, char *homehost);
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 bitmap_update_uuid(int fd, int *uuid);

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 int parse_auto(char *str, char *msg, int config);
extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
extern mddev_dev_t conf_get_devs(char *conffile);
extern struct createinfo *conf_get_create_info(char *conffile);
extern char *conf_get_mailaddr(char *conffile);
extern char *conf_get_mailfrom(char *conffile);
extern char *conf_get_program(char *conffile);
extern char *conf_get_homehost(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	*
4f589ad0	4	* Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
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>
b56c3630 NB	47	#ifdef __dietlibc__
b56c3630 NB	48	#include <strings.h>
280a927d NB	49	/* dietlibc has deprecated random and srandom!! */
	50	#define random rand
	51	#define srandom srand
98c6faba NB	52	#endif
98c6faba NB	53
64c4757e NB	54
64c4757e NB	55	#include <linux/kdev_t.h>
e0d19036 NB	56	/#include <linux/fs.h> /
	57	#include <sys/mount.h>
	58	#include <asm/types.h>
64c4757e NB	59	#include <sys/ioctl.h>
64c4757e NB	60	#define MD_MAJOR 9
dd0781e5	61	#define MdpMinorShift 6
64c4757e	62
e0d19036	63	#ifndef BLKGETSIZE64
98c6faba	64	#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 arg) /
e0d19036	65	#endif
56eb10c0	66
c82f047c NB	67	#define DEFAULT_BITMAP_CHUNK 4096
c82f047c NB	68	#define DEFAULT_BITMAP_DELAY 5
dfd4d8ee	69	#define DEFAULT_MAX_WRITE_BEHIND 256
64c4757e NB	70
64c4757e NB	71	#include "md_u.h"
e0d19036	72	#include "md_p.h"
c82f047c	73	#include "bitmap.h"
64c4757e	74
1e0d770c NB	75	#include <endian.h>
	76	/* #include "asm/byteorder.h" Redhat don't like this so... */
	77	#if __BYTE_ORDER == __LITTLE_ENDIAN
	78	# include <linux/byteorder/little_endian.h>
	79	#elif __BYTE_ORDER == __BIG_ENDIAN
	80	# include <linux/byteorder/big_endian.h>
	81	#elif __BYTE_ORDER == __PDP_ENDIAN
	82	# include <linux/byteorder/pdp_endian.h>
	83	#else
	84	# error "unknown endianness."
	85	#endif
	86
	87
	88
4b1ac34b NB	89	/* general information that might be extracted from a superblock */
	90	struct mdinfo {
	91	mdu_array_info_t array;
	92	mdu_disk_info_t disk;
	93	__u64 events;
fbf8a0b7	94	int uuid[4];
31317663	95	char name[33];
353632d9 NB	96	unsigned long long data_offset;
	97	unsigned long long component_size;
	98	int reshape_active;
	99	unsigned long long reshape_progress;
	100	int new_level, delta_disks, new_layout, new_chunk;
4b1ac34b NB	101	};
4b1ac34b NB	102
5bbb4842 NB	103	struct createinfo {
	104	int uid;
	105	int gid;
	106	int autof;
	107	int mode;
	108	};
	109
9a9dab36	110	#define Name "mdadm"
682c7051	111
e0d19036 NB	112	enum mode {
	113	ASSEMBLE=1,
	114	BUILD,
	115	CREATE,
	116	MANAGE,
	117	MISC,
	118	MONITOR,
dd0781e5	119	GROW,
e0d19036 NB	120	};
e0d19036 NB	121
64c4757e	122	extern char short_options[];
c06487ce	123	extern char short_bitmap_auto_options[];
64c4757e	124	extern struct option long_options[];
56eedc1a	125	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	126	Help_create[], Help_build[], Help_assemble[], Help_grow[],
e0d19036	127	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e	128
997aed5d NB	129	/* for option that don't have short equivilents, we assign arbitrary
	130	* small numbers. '1' means an undecorated option, so we start at '2'.
	131	*/
	132	enum special_options {
	133	AssumeClean = 2,
	134	BitmapChunk,
	135	WriteBehind,
	136	ReAdd,
	137	NoDegraded,
	138	Sparc22,
	139	BackupFile,
	140	HomeHost,
589395d6	141	AutoHomeHost,
997aed5d NB	142	};
997aed5d NB	143
64c4757e	144	/* structures read from config file */
52826846 NB	145	/* List of mddevice names and identifiers
	146	* Identifiers can be:
	147	* uuid=128-hex-uuid
	148	* super-minor=decimal-minor-number-from-superblock
	149	* devices=comma,separated,list,of,device,names,with,wildcards
	150	*
	151	* If multiple fields are present, the intersection of all matching
	152	* devices is considered
	153	*/
98c6faba	154	#define UnSet (0xfffe)
52826846	155	typedef struct mddev_ident_s {
dd0781e5	156	char *devname;
52826846	157
dd0781e5	158	int uuid_set;
3fa06e9d	159	int uuid[4];
947fd4dd	160	char name[33];
52826846	161
98c6faba	162	unsigned int super_minor;
52826846	163
dd0781e5	164	char devices; / comma separated list of device
52826846 NB	165	* names with wild cards
52826846 NB	166	*/
dd0781e5	167	int level;
98c6faba NB	168	unsigned int raid_disks;
98c6faba NB	169	unsigned int spare_disks;
82d9eba6	170	struct supertype *st;
dd0781e5 NB	171	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	172	char *spare_group;
7ef02d01	173	char *bitmap_file;
c82f047c	174	int bitmap_fd;
dd0781e5	175
52826846 NB	176	struct mddev_ident_s *next;
52826846 NB	177	} *mddev_ident_t;
64c4757e NB	178
	179	/* List of device names - wildcards expanded */
	180	typedef struct mddev_dev_s {
	181	char *devname;
cd29a5c8 NB	182	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	183	* Not set for names read from .config
	184	*/
dfd4d8ee	185	char writemostly;
fe80f49b	186	char re_add;
811e6cbe	187	char used; /* set when used */
64c4757e NB	188	struct mddev_dev_s *next;
	189	} *mddev_dev_t;
	190
682c7051 NB	191	typedef struct mapping {
	192	char *name;
	193	int num;
	194	} mapping_t;
	195
e0d19036 NB	196
	197	struct mdstat_ent {
	198	char *dev;
	199	int devnum;
	200	int active;
	201	char *level;
	202	char pattern; / U or up, _ for down */
	203	int percent; /* -1 if no resync */
e5329c37	204	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	205	struct mdstat_ent *next;
	206	};
	207
22a88995	208	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	209	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	210	extern void mdstat_wait(int seconds);
e0d19036	211
e86c9dd6 NB	212	/* Data structure for holding info read from sysfs */
	213	struct sysdev {
	214	char name[20];
	215	int role;
	216	int major, minor;
	217	unsigned long long offset, size;
	218	int state;
	219	int errors;
	220	struct sysdev *next;
	221	};
	222	struct sysarray {
	223	char name[20];
	224	struct sysdev *devs;
	225	int chunk;
	226	unsigned long long component_size;
	227	int layout;
	228	int level;
	229	int spares;
	230	};
	231	/* various details can be requested */
	232	#define GET_LEVEL 1
	233	#define GET_LAYOUT 2
	234	#define GET_COMPONENT 4
	235	#define GET_CHUNK 8
	236
	237	#define GET_DEVS 1024 /* gets role, major, minor */
	238	#define GET_OFFSET 2048
	239	#define GET_SIZE 4096
	240	#define GET_STATE 8192
	241	#define GET_ERROR 16384
	242
	243	/* If fd >= 0, get the array it is open on,
	244	* else use devnum. >=0 -> major9. <0.....
	245	*/
	246	extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
	247	extern int sysfs_set_str(struct sysarray sra, struct sysdev dev,
	248	char name, char val);
	249	extern int sysfs_set_num(struct sysarray sra, struct sysdev dev,
	250	char *name, unsigned long long val);
	251	extern int sysfs_get_ll(struct sysarray sra, struct sysdev dev,
	252	char name, unsigned long long val);
	253
	254
	255	extern int save_stripes(int source, unsigned long long offsets,
	256	int raid_disks, int chunk_size, int level, int layout,
	257	int nwrites, int *dest,
	258	unsigned long long start, unsigned long long length);
353632d9 NB	259	extern int restore_stripes(int dest, unsigned long long offsets,
	260	int raid_disks, int chunk_size, int level, int layout,
	261	int source, unsigned long long read_offset,
	262	unsigned long long start, unsigned long long length);
e86c9dd6	263
52826846 NB	264	#ifndef Sendmail
	265	#define Sendmail "/usr/lib/sendmail -t"
	266	#endif
	267
773135f5 NB	268	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	269
682c7051 NB	270	extern char map_num(mapping_t map, int num);
682c7051 NB	271	extern int map_name(mapping_t map, char name);
b5e64645	272	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	273
16c6fa80	274	extern char *map_dev(int major, int minor, int create);
64c4757e NB	275
64c4757e NB	276
f9ce90ba	277	extern struct superswitch {
a1cbd7d0	278	void (examine_super)(void sbv, char *homehost);
f9ce90ba	279	void (brief_examine_super)(void sbv);
b6750aa8	280	void (detail_super)(void sbv, char *homehost);
f9ce90ba NB	281	void (brief_detail_super)(void sbv);
f9ce90ba NB	282	void (uuid_from_super)(int uuid[4], void sbv);
31317663	283	void (getinfo_super)(struct mdinfo info, void *sbv);
83b6208e	284	int (match_home)(void sbv, char *homehost);
e5eac01f NB	285	int (update_super)(struct mdinfo info, void sbv, char update,
	286	char *devname, int verbose,
	287	int uuid_set, char *homehost);
f9ce90ba	288	__u64 (event_super)(void sbv);
05697ec1	289	int (init_super)(struct supertype st, void *sbp, mdu_array_info_t info, unsigned long long size, char name, char homehost);
f9ce90ba	290	void (add_to_super)(void sbv, mdu_disk_info_t *dinfo);
96395475	291	int (store_super)(struct supertype st, int fd, void *sbv);
1bf4e2d9	292	int (write_init_super)(struct supertype st, void sbv, mdu_disk_info_t dinfo, char *devname);
f9ce90ba	293	int (compare_super)(void firstp, void secondv);
82d9eba6 NB	294	int (load_super)(struct supertype st, int fd, void *sbp, char devname);
82d9eba6 NB	295	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	296	__u64 (avail_size)(struct supertype st, __u64 size);
f9c25f1d NB	297	int (add_internal_bitmap)(struct supertype st, void *sbv, int chunk, int delay, int write_behind,
f9c25f1d NB	298	unsigned long long size, int may_change, int major);
f6d75de8	299	void (locate_bitmap)(struct supertype st, int fd, void *sbv);
f5e166fe	300	int (write_bitmap)(struct supertype st, int fd, void *sbv);
82d9eba6	301	int major;
f277ce36	302	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	303	} super0, super1, *superlist[];
	304
	305	struct supertype {
	306	struct superswitch *ss;
	307	int minor_version;
ea329559	308	int max_devs;
82d9eba6	309	};
f9ce90ba	310
82d9eba6 NB	311	extern struct supertype *super_by_version(int vers, int minor);
82d9eba6 NB	312	extern struct supertype *guess_super(int fd);
f9ce90ba	313
838acbc2 NB	314	#if __GNUC__ < 3
	315	struct stat64;
	316	#endif
	317
173fc515 NB	318	#ifdef UCLIBC
	319	struct FTW {};
	320	# define FTW_PHYS 1
	321	#else
173fc515 NB	322	# include <ftw.h>
	323	# ifdef __dietlibc__
	324	# define FTW_PHYS 1
	325	# endif
	326	#endif
	327
	328	extern int add_dev(const char name, const struct stat stb, int flag, struct FTW *s);
	329
f9ce90ba	330
64c4757e	331	extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf	332	extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5	333	extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645	334	extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e	335	extern int Manage_subdevs(char *devname, int fd,
dab6685f	336	mddev_dev_t devlist, int verbose);
e5329c37	337	extern int Grow_Add_device(char devname, int fd, char newdev);
8fac0577	338	extern int Grow_addbitmap(char devname, int fd, char file, int chunk, int delay, int write_behind, int force);
06b0d786	339	extern int Grow_reshape(char devname, int fd, int quiet, char backup_file,
e86c9dd6 NB	340	long long size,
e86c9dd6 NB	341	int level, int layout, int chunksize, int raid_disks);
06b0d786 NB	342	extern int Grow_restart(struct supertype st, struct mdinfo info,
06b0d786 NB	343	int fdlist, int cnt, char backup_file);
64c4757e NB	344
64c4757e NB	345
82d9eba6	346	extern int Assemble(struct supertype st, char mddev, int mdfd,
52826846 NB	347	mddev_ident_t ident,
52826846 NB	348	char *conffile,
06b0d786	349	mddev_dev_t devlist, char *backup_file,
64c4757e	350	int readonly, int runstop,
e5eac01f	351	char update, char homehost,
64c4757e NB	352	int verbose, int force);
64c4757e NB	353
b5e64645	354	extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e	355	int raiddisks,
c82f047c	356	mddev_dev_t devlist, int assume_clean,
dab6685f	357	char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e NB	358
64c4757e NB	359
82d9eba6	360	extern int Create(struct supertype st, char mddev, int mdfd,
5dd497ee	361	int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
05697ec1	362	char name, char homehost,
cd29a5c8	363	int subdevs, mddev_dev_t devlist,
47d79ef8	364	int runstop, int verbose, int force, int assume_clean,
dfd4d8ee	365	char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e	366
b6750aa8	367	extern int Detail(char dev, int brief, int test, char homehost);
e0d19036	368	extern int Query(char *dev);
82d9eba6	369	extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
a1cbd7d0	370	struct supertype forcest, char homehost);
cd29a5c8	371	extern int Monitor(mddev_dev_t devlist,
e0d19036	372	char mailaddr, char alert_cmd,
aa88f531	373	int period, int daemonise, int scan, int oneshot,
773135f5	374	int dosyslog, char config, int test, char pidfile);
64c4757e	375
6409687b	376	extern int Kill(char *dev, int force, int quiet);
9a9dab36	377
c82f047c NB	378	extern int CreateBitmap(char *filename, int force, char uuid[16],
c82f047c NB	379	unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee	380	unsigned long write_behind,
dcec9ee5 NB	381	unsigned long long array_size,
dcec9ee5 NB	382	int major);
55935d51	383	extern int ExamineBitmap(char filename, int brief, struct supertype st);
9fca7d62	384	extern int bitmap_update_uuid(int fd, int *uuid);
c82f047c	385
64c4757e	386	extern int md_get_version(int fd);
e0d19036	387	extern int get_linux_version(void);
64c4757e	388	extern int parse_uuid(char *str, int uuid[4]);
682c7051 NB	389	extern int check_ext2(int fd, char *name);
	390	extern int check_reiser(int fd, char *name);
	391	extern int check_raid(int fd, char *name);
64c4757e	392
dd0781e5	393	extern int get_mdp_major(void);
8b0dabea	394	extern int dev_open(char *dev, int flags);
8d80900b	395	extern int is_standard(char dev, int nump);
dd0781e5	396
f1ae21c4	397	extern int parse_auto(char str, char msg, int config);
e0d19036 NB	398	extern mddev_ident_t conf_get_ident(char conffile, char dev);
e0d19036 NB	399	extern mddev_dev_t conf_get_devs(char *conffile);
5bbb4842	400	extern struct createinfo conf_get_create_info(char conffile);
e0d19036	401	extern char conf_get_mailaddr(char conffile);
4948b8f7	402	extern char conf_get_mailfrom(char conffile);
e0d19036	403	extern char conf_get_program(char conffile);
997aed5d	404	extern char conf_get_homehost(char conffile);
e0d19036	405	extern char conf_line(FILE file);
98c6faba	406	extern char conf_word(FILE file, int allow_key);
e0d19036 NB	407	extern void free_line(char *line);
e0d19036 NB	408	extern int match_oneof(char devices, char devname);
e0d19036	409	extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36	410	extern int same_uuid(int a[4], int b[4], int swapuuid);
4b1ac34b NB	411	/* extern int compare_super(mdp_super_t first, mdp_super_t second);*/
4b1ac34b NB	412	extern unsigned long calc_csum(void *super, int bytes);
265e0f17 NB	413	extern int enough(int level, int raid_disks, int layout,
265e0f17 NB	414	char *avail, int avail_disks);
e0d19036	415	extern int ask(char *mesg);
8fac0577	416	extern unsigned long long get_component_size(int fd);
e0d19036	417
cd29a5c8	418
56eb10c0	419	extern char *human_size(long long bytes);
e0d19036 NB	420	char *human_size_brief(long long bytes);
	421
	422	extern void put_md_name(char *name);
	423	extern char *get_md_name(int dev);
	424
c913b90e	425	extern char DefaultConfFile[];
b5e64645 NB	426
	427	extern int open_mddev(char *dev, int autof);
	428
	429
	430	#define LEVEL_MULTIPATH (-4)
	431	#define LEVEL_LINEAR (-1)
	432	#define LEVEL_FAULTY (-5)
	433
	434
	435	/* faulty stuff */
	436
	437	#define WriteTransient 0
	438	#define ReadTransient 1
	439	#define WritePersistent 2
	440	#define ReadPersistent 3
	441	#define WriteAll 4 /* doesn't go to device */
	442	#define ReadFixable 5
	443	#define Modes 6
	444
	445	#define ClearErrors 31
	446	#define ClearFaults 30
	447
	448	#define AllPersist 100 /* internal use only */
	449	#define NoPersist 101
	450
	451	#define ModeMask 0x1f
	452	#define ModeShift 5
fe6729fa NB	453
	454
	455	#ifdef __TINYC__
	456	#undef minor
	457	#undef major
	458	#undef makedev
	459	#define minor(x) ((x)&0xff)
	460	#define major(x) (((x)>>8)&0xff)
	461	#define makedev(M,m) (((M)<<8) \| (m))
	462	#endif
	463
e86c9dd6 NB	464	/* for raid5 */
	465	#define ALGORITHM_LEFT_ASYMMETRIC 0
	466	#define ALGORITHM_RIGHT_ASYMMETRIC 1
	467	#define ALGORITHM_LEFT_SYMMETRIC 2
	468	#define ALGORITHM_RIGHT_SYMMETRIC 3