[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__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;
};

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,
};

/* 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, 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 (*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 void 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>
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
5bbb4842 NB	102	struct createinfo {
	103	int uid;
	104	int gid;
	105	int autof;
	106	int mode;
	107	};
	108
9a9dab36	109	#define Name "mdadm"
682c7051	110
e0d19036 NB	111	enum mode {
	112	ASSEMBLE=1,
	113	BUILD,
	114	CREATE,
	115	MANAGE,
	116	MISC,
	117	MONITOR,
dd0781e5	118	GROW,
e0d19036 NB	119	};
e0d19036 NB	120
64c4757e	121	extern char short_options[];
c06487ce	122	extern char short_bitmap_auto_options[];
64c4757e	123	extern struct option long_options[];
56eedc1a	124	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	125	Help_create[], Help_build[], Help_assemble[], Help_grow[],
e0d19036	126	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e	127
997aed5d NB	128	/* for option that don't have short equivilents, we assign arbitrary
	129	* small numbers. '1' means an undecorated option, so we start at '2'.
	130	*/
	131	enum special_options {
	132	AssumeClean = 2,
	133	BitmapChunk,
	134	WriteBehind,
	135	ReAdd,
	136	NoDegraded,
	137	Sparc22,
	138	BackupFile,
	139	HomeHost,
	140	};
	141
64c4757e	142	/* structures read from config file */
52826846 NB	143	/* List of mddevice names and identifiers
	144	* Identifiers can be:
	145	* uuid=128-hex-uuid
	146	* super-minor=decimal-minor-number-from-superblock
	147	* devices=comma,separated,list,of,device,names,with,wildcards
	148	*
	149	* If multiple fields are present, the intersection of all matching
	150	* devices is considered
	151	*/
98c6faba	152	#define UnSet (0xfffe)
52826846	153	typedef struct mddev_ident_s {
dd0781e5	154	char *devname;
52826846	155
dd0781e5	156	int uuid_set;
3fa06e9d	157	int uuid[4];
947fd4dd	158	char name[33];
52826846	159
98c6faba	160	unsigned int super_minor;
52826846	161
dd0781e5	162	char devices; / comma separated list of device
52826846 NB	163	* names with wild cards
52826846 NB	164	*/
dd0781e5	165	int level;
98c6faba NB	166	unsigned int raid_disks;
98c6faba NB	167	unsigned int spare_disks;
82d9eba6	168	struct supertype *st;
dd0781e5 NB	169	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	170	char *spare_group;
7ef02d01	171	char *bitmap_file;
c82f047c	172	int bitmap_fd;
dd0781e5	173
52826846 NB	174	struct mddev_ident_s *next;
52826846 NB	175	} *mddev_ident_t;
64c4757e NB	176
	177	/* List of device names - wildcards expanded */
	178	typedef struct mddev_dev_s {
	179	char *devname;
cd29a5c8 NB	180	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	181	* Not set for names read from .config
	182	*/
dfd4d8ee	183	char writemostly;
fe80f49b	184	char re_add;
64c4757e NB	185	struct mddev_dev_s *next;
	186	} *mddev_dev_t;
	187
682c7051 NB	188	typedef struct mapping {
	189	char *name;
	190	int num;
	191	} mapping_t;
	192
e0d19036 NB	193
	194	struct mdstat_ent {
	195	char *dev;
	196	int devnum;
	197	int active;
	198	char *level;
	199	char pattern; / U or up, _ for down */
	200	int percent; /* -1 if no resync */
e5329c37	201	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	202	struct mdstat_ent *next;
	203	};
	204
22a88995	205	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	206	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	207	extern void mdstat_wait(int seconds);
e0d19036	208
e86c9dd6 NB	209	/* Data structure for holding info read from sysfs */
	210	struct sysdev {
	211	char name[20];
	212	int role;
	213	int major, minor;
	214	unsigned long long offset, size;
	215	int state;
	216	int errors;
	217	struct sysdev *next;
	218	};
	219	struct sysarray {
	220	char name[20];
	221	struct sysdev *devs;
	222	int chunk;
	223	unsigned long long component_size;
	224	int layout;
	225	int level;
	226	int spares;
	227	};
	228	/* various details can be requested */
	229	#define GET_LEVEL 1
	230	#define GET_LAYOUT 2
	231	#define GET_COMPONENT 4
	232	#define GET_CHUNK 8
	233
	234	#define GET_DEVS 1024 /* gets role, major, minor */
	235	#define GET_OFFSET 2048
	236	#define GET_SIZE 4096
	237	#define GET_STATE 8192
	238	#define GET_ERROR 16384
	239
	240	/* If fd >= 0, get the array it is open on,
	241	* else use devnum. >=0 -> major9. <0.....
	242	*/
	243	extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
	244	extern int sysfs_set_str(struct sysarray sra, struct sysdev dev,
	245	char name, char val);
	246	extern int sysfs_set_num(struct sysarray sra, struct sysdev dev,
	247	char *name, unsigned long long val);
	248	extern int sysfs_get_ll(struct sysarray sra, struct sysdev dev,
	249	char name, unsigned long long val);
	250
	251
	252	extern int save_stripes(int source, unsigned long long offsets,
	253	int raid_disks, int chunk_size, int level, int layout,
	254	int nwrites, int *dest,
	255	unsigned long long start, unsigned long long length);
353632d9 NB	256	extern int restore_stripes(int dest, unsigned long long offsets,
	257	int raid_disks, int chunk_size, int level, int layout,
	258	int source, unsigned long long read_offset,
	259	unsigned long long start, unsigned long long length);
e86c9dd6	260
52826846 NB	261	#ifndef Sendmail
	262	#define Sendmail "/usr/lib/sendmail -t"
	263	#endif
	264
773135f5 NB	265	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	266
682c7051 NB	267	extern char map_num(mapping_t map, int num);
682c7051 NB	268	extern int map_name(mapping_t map, char name);
b5e64645	269	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	270
16c6fa80	271	extern char *map_dev(int major, int minor, int create);
64c4757e NB	272
64c4757e NB	273
f9ce90ba	274	extern struct superswitch {
a1cbd7d0	275	void (examine_super)(void sbv, char *homehost);
f9ce90ba	276	void (brief_examine_super)(void sbv);
b6750aa8	277	void (detail_super)(void sbv, char *homehost);
f9ce90ba NB	278	void (brief_detail_super)(void sbv);
f9ce90ba NB	279	void (uuid_from_super)(int uuid[4], void sbv);
31317663	280	void (getinfo_super)(struct mdinfo info, void *sbv);
e5eac01f NB	281	int (update_super)(struct mdinfo info, void sbv, char update,
	282	char *devname, int verbose,
	283	int uuid_set, char *homehost);
f9ce90ba	284	__u64 (event_super)(void sbv);
05697ec1	285	int (init_super)(struct supertype st, void *sbp, mdu_array_info_t info, unsigned long long size, char name, char homehost);
f9ce90ba	286	void (add_to_super)(void sbv, mdu_disk_info_t *dinfo);
96395475	287	int (store_super)(struct supertype st, int fd, void *sbv);
1bf4e2d9	288	int (write_init_super)(struct supertype st, void sbv, mdu_disk_info_t dinfo, char *devname);
f9ce90ba	289	int (compare_super)(void firstp, void secondv);
82d9eba6 NB	290	int (load_super)(struct supertype st, int fd, void *sbp, char devname);
82d9eba6 NB	291	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	292	__u64 (avail_size)(struct supertype st, __u64 size);
f9c25f1d NB	293	int (add_internal_bitmap)(struct supertype st, void *sbv, int chunk, int delay, int write_behind,
f9c25f1d NB	294	unsigned long long size, int may_change, int major);
f6d75de8	295	void (locate_bitmap)(struct supertype st, int fd, void *sbv);
f5e166fe	296	int (write_bitmap)(struct supertype st, int fd, void *sbv);
82d9eba6	297	int major;
f277ce36	298	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	299	} super0, super1, *superlist[];
	300
	301	struct supertype {
	302	struct superswitch *ss;
	303	int minor_version;
ea329559	304	int max_devs;
82d9eba6	305	};
f9ce90ba	306
82d9eba6 NB	307	extern struct supertype *super_by_version(int vers, int minor);
82d9eba6 NB	308	extern struct supertype *guess_super(int fd);
f9ce90ba	309
838acbc2 NB	310	#if __GNUC__ < 3
	311	struct stat64;
	312	#endif
	313
173fc515 NB	314	#ifdef UCLIBC
	315	struct FTW {};
	316	# define FTW_PHYS 1
	317	#else
173fc515 NB	318	# include <ftw.h>
	319	# ifdef __dietlibc__
	320	# define FTW_PHYS 1
	321	# endif
	322	#endif
	323
	324	extern int add_dev(const char name, const struct stat stb, int flag, struct FTW *s);
	325
f9ce90ba	326
64c4757e	327	extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf	328	extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5	329	extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645	330	extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e	331	extern int Manage_subdevs(char *devname, int fd,
dab6685f	332	mddev_dev_t devlist, int verbose);
e5329c37	333	extern int Grow_Add_device(char devname, int fd, char newdev);
8fac0577	334	extern int Grow_addbitmap(char devname, int fd, char file, int chunk, int delay, int write_behind, int force);
06b0d786	335	extern int Grow_reshape(char devname, int fd, int quiet, char backup_file,
e86c9dd6 NB	336	long long size,
e86c9dd6 NB	337	int level, int layout, int chunksize, int raid_disks);
06b0d786 NB	338	extern int Grow_restart(struct supertype st, struct mdinfo info,
06b0d786 NB	339	int fdlist, int cnt, char backup_file);
64c4757e NB	340
64c4757e NB	341
82d9eba6	342	extern int Assemble(struct supertype st, char mddev, int mdfd,
52826846 NB	343	mddev_ident_t ident,
52826846 NB	344	char *conffile,
06b0d786	345	mddev_dev_t devlist, char *backup_file,
64c4757e	346	int readonly, int runstop,
e5eac01f	347	char update, char homehost,
64c4757e NB	348	int verbose, int force);
64c4757e NB	349
b5e64645	350	extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e	351	int raiddisks,
c82f047c	352	mddev_dev_t devlist, int assume_clean,
dab6685f	353	char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e NB	354
64c4757e NB	355
82d9eba6	356	extern int Create(struct supertype st, char mddev, int mdfd,
5dd497ee	357	int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
05697ec1	358	char name, char homehost,
cd29a5c8	359	int subdevs, mddev_dev_t devlist,
47d79ef8	360	int runstop, int verbose, int force, int assume_clean,
dfd4d8ee	361	char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e	362
b6750aa8	363	extern int Detail(char dev, int brief, int test, char homehost);
e0d19036	364	extern int Query(char *dev);
82d9eba6	365	extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
a1cbd7d0	366	struct supertype forcest, char homehost);
cd29a5c8	367	extern int Monitor(mddev_dev_t devlist,
e0d19036	368	char mailaddr, char alert_cmd,
aa88f531	369	int period, int daemonise, int scan, int oneshot,
773135f5	370	int dosyslog, char config, int test, char pidfile);
64c4757e	371
6409687b	372	extern int Kill(char *dev, int force, int quiet);
9a9dab36	373
c82f047c NB	374	extern int CreateBitmap(char *filename, int force, char uuid[16],
c82f047c NB	375	unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee	376	unsigned long write_behind,
dcec9ee5 NB	377	unsigned long long array_size,
dcec9ee5 NB	378	int major);
55935d51	379	extern int ExamineBitmap(char filename, int brief, struct supertype st);
8131b493	380	extern void bitmap_update_uuid(int fd, int *uuid);
c82f047c	381
64c4757e	382	extern int md_get_version(int fd);
e0d19036	383	extern int get_linux_version(void);
64c4757e	384	extern int parse_uuid(char *str, int uuid[4]);
682c7051 NB	385	extern int check_ext2(int fd, char *name);
	386	extern int check_reiser(int fd, char *name);
	387	extern int check_raid(int fd, char *name);
64c4757e	388
dd0781e5	389	extern int get_mdp_major(void);
8b0dabea	390	extern int dev_open(char *dev, int flags);
8d80900b	391	extern int is_standard(char dev, int nump);
dd0781e5	392
f1ae21c4	393	extern int parse_auto(char str, char msg, int config);
e0d19036 NB	394	extern mddev_ident_t conf_get_ident(char conffile, char dev);
e0d19036 NB	395	extern mddev_dev_t conf_get_devs(char *conffile);
5bbb4842	396	extern struct createinfo conf_get_create_info(char conffile);
e0d19036	397	extern char conf_get_mailaddr(char conffile);
4948b8f7	398	extern char conf_get_mailfrom(char conffile);
e0d19036	399	extern char conf_get_program(char conffile);
997aed5d	400	extern char conf_get_homehost(char conffile);
e0d19036	401	extern char conf_line(FILE file);
98c6faba	402	extern char conf_word(FILE file, int allow_key);
e0d19036 NB	403	extern void free_line(char *line);
e0d19036 NB	404	extern int match_oneof(char devices, char devname);
e0d19036	405	extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36	406	extern int same_uuid(int a[4], int b[4], int swapuuid);
4b1ac34b NB	407	/* extern int compare_super(mdp_super_t first, mdp_super_t second);*/
4b1ac34b NB	408	extern unsigned long calc_csum(void *super, int bytes);
265e0f17 NB	409	extern int enough(int level, int raid_disks, int layout,
265e0f17 NB	410	char *avail, int avail_disks);
e0d19036	411	extern int ask(char *mesg);
8fac0577	412	extern unsigned long long get_component_size(int fd);
e0d19036	413
cd29a5c8	414
56eb10c0	415	extern char *human_size(long long bytes);
e0d19036 NB	416	char *human_size_brief(long long bytes);
	417
	418	extern void put_md_name(char *name);
	419	extern char *get_md_name(int dev);
	420
c913b90e	421	extern char DefaultConfFile[];
b5e64645 NB	422
	423	extern int open_mddev(char *dev, int autof);
	424
	425
	426	#define LEVEL_MULTIPATH (-4)
	427	#define LEVEL_LINEAR (-1)
	428	#define LEVEL_FAULTY (-5)
	429
	430
	431	/* faulty stuff */
	432
	433	#define WriteTransient 0
	434	#define ReadTransient 1
	435	#define WritePersistent 2
	436	#define ReadPersistent 3
	437	#define WriteAll 4 /* doesn't go to device */
	438	#define ReadFixable 5
	439	#define Modes 6
	440
	441	#define ClearErrors 31
	442	#define ClearFaults 30
	443
	444	#define AllPersist 100 /* internal use only */
	445	#define NoPersist 101
	446
	447	#define ModeMask 0x1f
	448	#define ModeShift 5
fe6729fa NB	449
	450
	451	#ifdef __TINYC__
	452	#undef minor
	453	#undef major
	454	#undef makedev
	455	#define minor(x) ((x)&0xff)
	456	#define major(x) (((x)>>8)&0xff)
	457	#define makedev(M,m) (((M)<<8) \| (m))
	458	#endif
	459
e86c9dd6 NB	460	/* for raid5 */
	461	#define ALGORITHM_LEFT_ASYMMETRIC 0
	462	#define ALGORITHM_RIGHT_ASYMMETRIC 1
	463	#define ALGORITHM_LEFT_SYMMETRIC 2
	464	#define ALGORITHM_RIGHT_SYMMETRIC 3