[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 <byteswap.h>
/* Redhat don't like to #include <asm/byteorder.h>, and
 * some time include <linux/byteorder/xxx_endian.h> isn't enough,
 * and there is no standard conversion function so... */
#if BYTE_ORDER == LITTLE_ENDIAN
#define	__cpu_to_le16(_x) (_x)
#define __cpu_to_le32(_x) (_x)
#define __cpu_to_le64(_x) (_x)
#define	__le16_to_cpu(_x) (_x)
#define __le32_to_cpu(_x) (_x)
#define __le64_to_cpu(_x) (_x)
#elif BYTE_ORDER == BIG_ENDIAN
#define	__cpu_to_le16(_x) bswap_16(_x)
#define __cpu_to_le32(_x) bswap_32(_x)
#define __cpu_to_le64(_x) bswap_64(_x)
#define	__le16_to_cpu(_x) bswap_16(_x)
#define __le32_to_cpu(_x) bswap_32(_x)
#define __le64_to_cpu(_x) bswap_64(_x)
#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	75	#include <endian.h>
efd441d1 NB	76	#include <byteswap.h>
	77	/* Redhat don't like to #include <asm/byteorder.h>, and
	78	* some time include <linux/byteorder/xxx_endian.h> isn't enough,
	79	* and there is no standard conversion function so... */
	80	#if BYTE_ORDER == LITTLE_ENDIAN
	81	#define __cpu_to_le16(_x) (_x)
	82	#define __cpu_to_le32(_x) (_x)
	83	#define __cpu_to_le64(_x) (_x)
	84	#define __le16_to_cpu(_x) (_x)
	85	#define __le32_to_cpu(_x) (_x)
	86	#define __le64_to_cpu(_x) (_x)
	87	#elif BYTE_ORDER == BIG_ENDIAN
	88	#define __cpu_to_le16(_x) bswap_16(_x)
	89	#define __cpu_to_le32(_x) bswap_32(_x)
	90	#define __cpu_to_le64(_x) bswap_64(_x)
	91	#define __le16_to_cpu(_x) bswap_16(_x)
	92	#define __le32_to_cpu(_x) bswap_32(_x)
	93	#define __le64_to_cpu(_x) bswap_64(_x)
1e0d770c NB	94	#else
	95	# error "unknown endianness."
	96	#endif
	97
	98
	99
4b1ac34b NB	100	/* general information that might be extracted from a superblock */
	101	struct mdinfo {
	102	mdu_array_info_t array;
	103	mdu_disk_info_t disk;
	104	__u64 events;
fbf8a0b7	105	int uuid[4];
31317663	106	char name[33];
353632d9 NB	107	unsigned long long data_offset;
	108	unsigned long long component_size;
	109	int reshape_active;
	110	unsigned long long reshape_progress;
	111	int new_level, delta_disks, new_layout, new_chunk;
4b1ac34b NB	112	};
4b1ac34b NB	113
5bbb4842 NB	114	struct createinfo {
	115	int uid;
	116	int gid;
	117	int autof;
	118	int mode;
	119	};
	120
9a9dab36	121	#define Name "mdadm"
682c7051	122
e0d19036 NB	123	enum mode {
	124	ASSEMBLE=1,
	125	BUILD,
	126	CREATE,
	127	MANAGE,
	128	MISC,
	129	MONITOR,
dd0781e5	130	GROW,
e0d19036 NB	131	};
e0d19036 NB	132
64c4757e	133	extern char short_options[];
c06487ce	134	extern char short_bitmap_auto_options[];
64c4757e	135	extern struct option long_options[];
56eedc1a	136	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	137	Help_create[], Help_build[], Help_assemble[], Help_grow[],
e0d19036	138	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e	139
997aed5d NB	140	/* for option that don't have short equivilents, we assign arbitrary
	141	* small numbers. '1' means an undecorated option, so we start at '2'.
	142	*/
	143	enum special_options {
	144	AssumeClean = 2,
	145	BitmapChunk,
	146	WriteBehind,
	147	ReAdd,
	148	NoDegraded,
	149	Sparc22,
	150	BackupFile,
	151	HomeHost,
589395d6	152	AutoHomeHost,
997aed5d NB	153	};
997aed5d NB	154
64c4757e	155	/* structures read from config file */
52826846 NB	156	/* List of mddevice names and identifiers
	157	* Identifiers can be:
	158	* uuid=128-hex-uuid
	159	* super-minor=decimal-minor-number-from-superblock
	160	* devices=comma,separated,list,of,device,names,with,wildcards
	161	*
	162	* If multiple fields are present, the intersection of all matching
	163	* devices is considered
	164	*/
98c6faba	165	#define UnSet (0xfffe)
52826846	166	typedef struct mddev_ident_s {
dd0781e5	167	char *devname;
52826846	168
dd0781e5	169	int uuid_set;
3fa06e9d	170	int uuid[4];
947fd4dd	171	char name[33];
52826846	172
98c6faba	173	unsigned int super_minor;
52826846	174
dd0781e5	175	char devices; / comma separated list of device
52826846 NB	176	* names with wild cards
52826846 NB	177	*/
dd0781e5	178	int level;
98c6faba NB	179	unsigned int raid_disks;
98c6faba NB	180	unsigned int spare_disks;
82d9eba6	181	struct supertype *st;
dd0781e5 NB	182	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	183	char *spare_group;
7ef02d01	184	char *bitmap_file;
c82f047c	185	int bitmap_fd;
dd0781e5	186
52826846 NB	187	struct mddev_ident_s *next;
52826846 NB	188	} *mddev_ident_t;
64c4757e NB	189
	190	/* List of device names - wildcards expanded */
	191	typedef struct mddev_dev_s {
	192	char *devname;
cd29a5c8 NB	193	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	194	* Not set for names read from .config
	195	*/
dfd4d8ee	196	char writemostly;
fe80f49b	197	char re_add;
811e6cbe	198	char used; /* set when used */
64c4757e NB	199	struct mddev_dev_s *next;
	200	} *mddev_dev_t;
	201
682c7051 NB	202	typedef struct mapping {
	203	char *name;
	204	int num;
	205	} mapping_t;
	206
e0d19036 NB	207
	208	struct mdstat_ent {
	209	char *dev;
	210	int devnum;
	211	int active;
	212	char *level;
	213	char pattern; / U or up, _ for down */
	214	int percent; /* -1 if no resync */
e5329c37	215	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	216	struct mdstat_ent *next;
	217	};
	218
22a88995	219	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	220	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	221	extern void mdstat_wait(int seconds);
e0d19036	222
e86c9dd6 NB	223	/* Data structure for holding info read from sysfs */
	224	struct sysdev {
	225	char name[20];
	226	int role;
	227	int major, minor;
	228	unsigned long long offset, size;
	229	int state;
	230	int errors;
	231	struct sysdev *next;
	232	};
	233	struct sysarray {
	234	char name[20];
	235	struct sysdev *devs;
	236	int chunk;
	237	unsigned long long component_size;
	238	int layout;
	239	int level;
	240	int spares;
	241	};
	242	/* various details can be requested */
	243	#define GET_LEVEL 1
	244	#define GET_LAYOUT 2
	245	#define GET_COMPONENT 4
	246	#define GET_CHUNK 8
	247
	248	#define GET_DEVS 1024 /* gets role, major, minor */
	249	#define GET_OFFSET 2048
	250	#define GET_SIZE 4096
	251	#define GET_STATE 8192
	252	#define GET_ERROR 16384
	253
	254	/* If fd >= 0, get the array it is open on,
	255	* else use devnum. >=0 -> major9. <0.....
	256	*/
	257	extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
	258	extern int sysfs_set_str(struct sysarray sra, struct sysdev dev,
	259	char name, char val);
	260	extern int sysfs_set_num(struct sysarray sra, struct sysdev dev,
	261	char *name, unsigned long long val);
	262	extern int sysfs_get_ll(struct sysarray sra, struct sysdev dev,
	263	char name, unsigned long long val);
	264
	265
	266	extern int save_stripes(int source, unsigned long long offsets,
	267	int raid_disks, int chunk_size, int level, int layout,
	268	int nwrites, int *dest,
	269	unsigned long long start, unsigned long long length);
353632d9 NB	270	extern int restore_stripes(int dest, unsigned long long offsets,
	271	int raid_disks, int chunk_size, int level, int layout,
	272	int source, unsigned long long read_offset,
	273	unsigned long long start, unsigned long long length);
e86c9dd6	274
52826846 NB	275	#ifndef Sendmail
	276	#define Sendmail "/usr/lib/sendmail -t"
	277	#endif
	278
773135f5 NB	279	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	280
682c7051 NB	281	extern char map_num(mapping_t map, int num);
682c7051 NB	282	extern int map_name(mapping_t map, char name);
b5e64645	283	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	284
16c6fa80	285	extern char *map_dev(int major, int minor, int create);
64c4757e NB	286
64c4757e NB	287
f9ce90ba	288	extern struct superswitch {
a1cbd7d0	289	void (examine_super)(void sbv, char *homehost);
f9ce90ba	290	void (brief_examine_super)(void sbv);
b6750aa8	291	void (detail_super)(void sbv, char *homehost);
f9ce90ba NB	292	void (brief_detail_super)(void sbv);
f9ce90ba NB	293	void (uuid_from_super)(int uuid[4], void sbv);
31317663	294	void (getinfo_super)(struct mdinfo info, void *sbv);
83b6208e	295	int (match_home)(void sbv, char *homehost);
e5eac01f NB	296	int (update_super)(struct mdinfo info, void sbv, char update,
	297	char *devname, int verbose,
	298	int uuid_set, char *homehost);
f9ce90ba	299	__u64 (event_super)(void sbv);
05697ec1	300	int (init_super)(struct supertype st, void *sbp, mdu_array_info_t info, unsigned long long size, char name, char homehost);
f9ce90ba	301	void (add_to_super)(void sbv, mdu_disk_info_t *dinfo);
96395475	302	int (store_super)(struct supertype st, int fd, void *sbv);
1bf4e2d9	303	int (write_init_super)(struct supertype st, void sbv, mdu_disk_info_t dinfo, char *devname);
f9ce90ba	304	int (compare_super)(void firstp, void secondv);
82d9eba6 NB	305	int (load_super)(struct supertype st, int fd, void *sbp, char devname);
82d9eba6 NB	306	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	307	__u64 (avail_size)(struct supertype st, __u64 size);
f9c25f1d NB	308	int (add_internal_bitmap)(struct supertype st, void *sbv, int chunk, int delay, int write_behind,
f9c25f1d NB	309	unsigned long long size, int may_change, int major);
f6d75de8	310	void (locate_bitmap)(struct supertype st, int fd, void *sbv);
f5e166fe	311	int (write_bitmap)(struct supertype st, int fd, void *sbv);
82d9eba6	312	int major;
f277ce36	313	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	314	} super0, super1, *superlist[];
	315
	316	struct supertype {
	317	struct superswitch *ss;
	318	int minor_version;
ea329559	319	int max_devs;
82d9eba6	320	};
f9ce90ba	321
82d9eba6 NB	322	extern struct supertype *super_by_version(int vers, int minor);
82d9eba6 NB	323	extern struct supertype *guess_super(int fd);
f9ce90ba	324
838acbc2 NB	325	#if __GNUC__ < 3
	326	struct stat64;
	327	#endif
	328
173fc515 NB	329	#ifdef UCLIBC
	330	struct FTW {};
	331	# define FTW_PHYS 1
	332	#else
173fc515 NB	333	# include <ftw.h>
	334	# ifdef __dietlibc__
	335	# define FTW_PHYS 1
	336	# endif
	337	#endif
	338
	339	extern int add_dev(const char name, const struct stat stb, int flag, struct FTW *s);
	340
f9ce90ba	341
64c4757e	342	extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf	343	extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5	344	extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645	345	extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e	346	extern int Manage_subdevs(char *devname, int fd,
dab6685f	347	mddev_dev_t devlist, int verbose);
e5329c37	348	extern int Grow_Add_device(char devname, int fd, char newdev);
8fac0577	349	extern int Grow_addbitmap(char devname, int fd, char file, int chunk, int delay, int write_behind, int force);
06b0d786	350	extern int Grow_reshape(char devname, int fd, int quiet, char backup_file,
e86c9dd6 NB	351	long long size,
e86c9dd6 NB	352	int level, int layout, int chunksize, int raid_disks);
06b0d786 NB	353	extern int Grow_restart(struct supertype st, struct mdinfo info,
06b0d786 NB	354	int fdlist, int cnt, char backup_file);
64c4757e NB	355
64c4757e NB	356
82d9eba6	357	extern int Assemble(struct supertype st, char mddev, int mdfd,
52826846 NB	358	mddev_ident_t ident,
52826846 NB	359	char *conffile,
06b0d786	360	mddev_dev_t devlist, char *backup_file,
64c4757e	361	int readonly, int runstop,
e5eac01f	362	char update, char homehost,
64c4757e NB	363	int verbose, int force);
64c4757e NB	364
b5e64645	365	extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e	366	int raiddisks,
c82f047c	367	mddev_dev_t devlist, int assume_clean,
dab6685f	368	char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e NB	369
64c4757e NB	370
82d9eba6	371	extern int Create(struct supertype st, char mddev, int mdfd,
5dd497ee	372	int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
05697ec1	373	char name, char homehost,
cd29a5c8	374	int subdevs, mddev_dev_t devlist,
47d79ef8	375	int runstop, int verbose, int force, int assume_clean,
dfd4d8ee	376	char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e	377
b6750aa8	378	extern int Detail(char dev, int brief, int test, char homehost);
e0d19036	379	extern int Query(char *dev);
82d9eba6	380	extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
a1cbd7d0	381	struct supertype forcest, char homehost);
cd29a5c8	382	extern int Monitor(mddev_dev_t devlist,
e0d19036	383	char mailaddr, char alert_cmd,
aa88f531	384	int period, int daemonise, int scan, int oneshot,
773135f5	385	int dosyslog, char config, int test, char pidfile);
64c4757e	386
6409687b	387	extern int Kill(char *dev, int force, int quiet);
9a9dab36	388
c82f047c NB	389	extern int CreateBitmap(char *filename, int force, char uuid[16],
c82f047c NB	390	unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee	391	unsigned long write_behind,
dcec9ee5 NB	392	unsigned long long array_size,
dcec9ee5 NB	393	int major);
55935d51	394	extern int ExamineBitmap(char filename, int brief, struct supertype st);
9fca7d62	395	extern int bitmap_update_uuid(int fd, int *uuid);
c82f047c	396
64c4757e	397	extern int md_get_version(int fd);
e0d19036	398	extern int get_linux_version(void);
64c4757e	399	extern int parse_uuid(char *str, int uuid[4]);
682c7051 NB	400	extern int check_ext2(int fd, char *name);
	401	extern int check_reiser(int fd, char *name);
	402	extern int check_raid(int fd, char *name);
64c4757e	403
dd0781e5	404	extern int get_mdp_major(void);
8b0dabea	405	extern int dev_open(char *dev, int flags);
8d80900b	406	extern int is_standard(char dev, int nump);
dd0781e5	407
f1ae21c4	408	extern int parse_auto(char str, char msg, int config);
e0d19036 NB	409	extern mddev_ident_t conf_get_ident(char conffile, char dev);
e0d19036 NB	410	extern mddev_dev_t conf_get_devs(char *conffile);
5bbb4842	411	extern struct createinfo conf_get_create_info(char conffile);
e0d19036	412	extern char conf_get_mailaddr(char conffile);
4948b8f7	413	extern char conf_get_mailfrom(char conffile);
e0d19036	414	extern char conf_get_program(char conffile);
997aed5d	415	extern char conf_get_homehost(char conffile);
e0d19036	416	extern char conf_line(FILE file);
98c6faba	417	extern char conf_word(FILE file, int allow_key);
e0d19036 NB	418	extern void free_line(char *line);
e0d19036 NB	419	extern int match_oneof(char devices, char devname);
e0d19036	420	extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36	421	extern int same_uuid(int a[4], int b[4], int swapuuid);
4b1ac34b NB	422	/* extern int compare_super(mdp_super_t first, mdp_super_t second);*/
4b1ac34b NB	423	extern unsigned long calc_csum(void *super, int bytes);
265e0f17 NB	424	extern int enough(int level, int raid_disks, int layout,
265e0f17 NB	425	char *avail, int avail_disks);
e0d19036	426	extern int ask(char *mesg);
8fac0577	427	extern unsigned long long get_component_size(int fd);
e0d19036	428
cd29a5c8	429
56eb10c0	430	extern char *human_size(long long bytes);
e0d19036 NB	431	char *human_size_brief(long long bytes);
	432
	433	extern void put_md_name(char *name);
	434	extern char *get_md_name(int dev);
	435
c913b90e	436	extern char DefaultConfFile[];
b5e64645 NB	437
	438	extern int open_mddev(char *dev, int autof);
	439
	440
	441	#define LEVEL_MULTIPATH (-4)
	442	#define LEVEL_LINEAR (-1)
	443	#define LEVEL_FAULTY (-5)
	444
	445
	446	/* faulty stuff */
	447
	448	#define WriteTransient 0
	449	#define ReadTransient 1
	450	#define WritePersistent 2
	451	#define ReadPersistent 3
	452	#define WriteAll 4 /* doesn't go to device */
	453	#define ReadFixable 5
	454	#define Modes 6
	455
	456	#define ClearErrors 31
	457	#define ClearFaults 30
	458
	459	#define AllPersist 100 /* internal use only */
	460	#define NoPersist 101
	461
	462	#define ModeMask 0x1f
	463	#define ModeShift 5
fe6729fa NB	464
	465
	466	#ifdef __TINYC__
	467	#undef minor
	468	#undef major
	469	#undef makedev
	470	#define minor(x) ((x)&0xff)
	471	#define major(x) (((x)>>8)&0xff)
	472	#define makedev(M,m) (((M)<<8) \| (m))
	473	#endif
	474
e86c9dd6 NB	475	/* for raid5 */
	476	#define ALGORITHM_LEFT_ASYMMETRIC 0
	477	#define ALGORITHM_RIGHT_ASYMMETRIC 1
	478	#define ALGORITHM_LEFT_SYMMETRIC 2
	479	#define ALGORITHM_RIGHT_SYMMETRIC 3