[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;
	struct supertype *supertype;
};

#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;
058574b1	119	struct supertype *supertype;
5bbb4842 NB	120	};
5bbb4842 NB	121
9a9dab36	122	#define Name "mdadm"
682c7051	123
e0d19036 NB	124	enum mode {
	125	ASSEMBLE=1,
	126	BUILD,
	127	CREATE,
	128	MANAGE,
	129	MISC,
	130	MONITOR,
dd0781e5	131	GROW,
e0d19036 NB	132	};
e0d19036 NB	133
64c4757e	134	extern char short_options[];
c06487ce	135	extern char short_bitmap_auto_options[];
64c4757e	136	extern struct option long_options[];
56eedc1a	137	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	138	Help_create[], Help_build[], Help_assemble[], Help_grow[],
e0d19036	139	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e	140
997aed5d NB	141	/* for option that don't have short equivilents, we assign arbitrary
	142	* small numbers. '1' means an undecorated option, so we start at '2'.
	143	*/
	144	enum special_options {
	145	AssumeClean = 2,
	146	BitmapChunk,
	147	WriteBehind,
	148	ReAdd,
	149	NoDegraded,
	150	Sparc22,
	151	BackupFile,
	152	HomeHost,
589395d6	153	AutoHomeHost,
997aed5d NB	154	};
997aed5d NB	155
64c4757e	156	/* structures read from config file */
52826846 NB	157	/* List of mddevice names and identifiers
	158	* Identifiers can be:
	159	* uuid=128-hex-uuid
	160	* super-minor=decimal-minor-number-from-superblock
	161	* devices=comma,separated,list,of,device,names,with,wildcards
	162	*
	163	* If multiple fields are present, the intersection of all matching
	164	* devices is considered
	165	*/
98c6faba	166	#define UnSet (0xfffe)
52826846	167	typedef struct mddev_ident_s {
dd0781e5	168	char *devname;
52826846	169
dd0781e5	170	int uuid_set;
3fa06e9d	171	int uuid[4];
947fd4dd	172	char name[33];
52826846	173
98c6faba	174	unsigned int super_minor;
52826846	175
dd0781e5	176	char devices; / comma separated list of device
52826846 NB	177	* names with wild cards
52826846 NB	178	*/
dd0781e5	179	int level;
98c6faba NB	180	unsigned int raid_disks;
98c6faba NB	181	unsigned int spare_disks;
82d9eba6	182	struct supertype *st;
dd0781e5 NB	183	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	184	char *spare_group;
7ef02d01	185	char *bitmap_file;
c82f047c	186	int bitmap_fd;
dd0781e5	187
52826846 NB	188	struct mddev_ident_s *next;
52826846 NB	189	} *mddev_ident_t;
64c4757e NB	190
	191	/* List of device names - wildcards expanded */
	192	typedef struct mddev_dev_s {
	193	char *devname;
cd29a5c8 NB	194	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	195	* Not set for names read from .config
	196	*/
dfd4d8ee	197	char writemostly;
fe80f49b	198	char re_add;
811e6cbe	199	char used; /* set when used */
64c4757e NB	200	struct mddev_dev_s *next;
	201	} *mddev_dev_t;
	202
682c7051 NB	203	typedef struct mapping {
	204	char *name;
	205	int num;
	206	} mapping_t;
	207
e0d19036 NB	208
	209	struct mdstat_ent {
	210	char *dev;
	211	int devnum;
	212	int active;
	213	char *level;
	214	char pattern; / U or up, _ for down */
	215	int percent; /* -1 if no resync */
e5329c37	216	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	217	struct mdstat_ent *next;
	218	};
	219
22a88995	220	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	221	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	222	extern void mdstat_wait(int seconds);
e0d19036	223
e86c9dd6 NB	224	/* Data structure for holding info read from sysfs */
	225	struct sysdev {
	226	char name[20];
	227	int role;
	228	int major, minor;
	229	unsigned long long offset, size;
	230	int state;
	231	int errors;
	232	struct sysdev *next;
	233	};
	234	struct sysarray {
	235	char name[20];
	236	struct sysdev *devs;
	237	int chunk;
	238	unsigned long long component_size;
	239	int layout;
	240	int level;
	241	int spares;
	242	};
	243	/* various details can be requested */
	244	#define GET_LEVEL 1
	245	#define GET_LAYOUT 2
	246	#define GET_COMPONENT 4
	247	#define GET_CHUNK 8
	248
	249	#define GET_DEVS 1024 /* gets role, major, minor */
	250	#define GET_OFFSET 2048
	251	#define GET_SIZE 4096
	252	#define GET_STATE 8192
	253	#define GET_ERROR 16384
	254
	255	/* If fd >= 0, get the array it is open on,
	256	* else use devnum. >=0 -> major9. <0.....
	257	*/
	258	extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
	259	extern int sysfs_set_str(struct sysarray sra, struct sysdev dev,
	260	char name, char val);
	261	extern int sysfs_set_num(struct sysarray sra, struct sysdev dev,
	262	char *name, unsigned long long val);
	263	extern int sysfs_get_ll(struct sysarray sra, struct sysdev dev,
	264	char name, unsigned long long val);
	265
	266
	267	extern int save_stripes(int source, unsigned long long offsets,
	268	int raid_disks, int chunk_size, int level, int layout,
	269	int nwrites, int *dest,
	270	unsigned long long start, unsigned long long length);
353632d9 NB	271	extern int restore_stripes(int dest, unsigned long long offsets,
	272	int raid_disks, int chunk_size, int level, int layout,
	273	int source, unsigned long long read_offset,
	274	unsigned long long start, unsigned long long length);
e86c9dd6	275
52826846 NB	276	#ifndef Sendmail
	277	#define Sendmail "/usr/lib/sendmail -t"
	278	#endif
	279
773135f5 NB	280	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	281
682c7051 NB	282	extern char map_num(mapping_t map, int num);
682c7051 NB	283	extern int map_name(mapping_t map, char name);
b5e64645	284	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	285
16c6fa80	286	extern char *map_dev(int major, int minor, int create);
64c4757e NB	287
64c4757e NB	288
f9ce90ba	289	extern struct superswitch {
a1cbd7d0	290	void (examine_super)(void sbv, char *homehost);
f9ce90ba	291	void (brief_examine_super)(void sbv);
b6750aa8	292	void (detail_super)(void sbv, char *homehost);
f9ce90ba NB	293	void (brief_detail_super)(void sbv);
f9ce90ba NB	294	void (uuid_from_super)(int uuid[4], void sbv);
31317663	295	void (getinfo_super)(struct mdinfo info, void *sbv);
83b6208e	296	int (match_home)(void sbv, char *homehost);
e5eac01f NB	297	int (update_super)(struct mdinfo info, void sbv, char update,
	298	char *devname, int verbose,
	299	int uuid_set, char *homehost);
f9ce90ba	300	__u64 (event_super)(void sbv);
05697ec1	301	int (init_super)(struct supertype st, void *sbp, mdu_array_info_t info, unsigned long long size, char name, char homehost);
f9ce90ba	302	void (add_to_super)(void sbv, mdu_disk_info_t *dinfo);
96395475	303	int (store_super)(struct supertype st, int fd, void *sbv);
1bf4e2d9	304	int (write_init_super)(struct supertype st, void sbv, mdu_disk_info_t dinfo, char *devname);
f9ce90ba	305	int (compare_super)(void firstp, void secondv);
82d9eba6 NB	306	int (load_super)(struct supertype st, int fd, void *sbp, char devname);
82d9eba6 NB	307	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	308	__u64 (avail_size)(struct supertype st, __u64 size);
f9c25f1d NB	309	int (add_internal_bitmap)(struct supertype st, void *sbv, int chunk, int delay, int write_behind,
f9c25f1d NB	310	unsigned long long size, int may_change, int major);
f6d75de8	311	void (locate_bitmap)(struct supertype st, int fd, void *sbv);
f5e166fe	312	int (write_bitmap)(struct supertype st, int fd, void *sbv);
82d9eba6	313	int major;
f277ce36	314	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	315	} super0, super1, *superlist[];
	316
	317	struct supertype {
	318	struct superswitch *ss;
	319	int minor_version;
ea329559	320	int max_devs;
82d9eba6	321	};
f9ce90ba	322
82d9eba6 NB	323	extern struct supertype *super_by_version(int vers, int minor);
82d9eba6 NB	324	extern struct supertype *guess_super(int fd);
f9ce90ba	325
838acbc2 NB	326	#if __GNUC__ < 3
	327	struct stat64;
	328	#endif
	329
173fc515 NB	330	#ifdef UCLIBC
	331	struct FTW {};
	332	# define FTW_PHYS 1
	333	#else
173fc515 NB	334	# include <ftw.h>
	335	# ifdef __dietlibc__
	336	# define FTW_PHYS 1
	337	# endif
	338	#endif
	339
	340	extern int add_dev(const char name, const struct stat stb, int flag, struct FTW *s);
	341
f9ce90ba	342
64c4757e	343	extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf	344	extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5	345	extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645	346	extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e	347	extern int Manage_subdevs(char *devname, int fd,
dab6685f	348	mddev_dev_t devlist, int verbose);
e5329c37	349	extern int Grow_Add_device(char devname, int fd, char newdev);
8fac0577	350	extern int Grow_addbitmap(char devname, int fd, char file, int chunk, int delay, int write_behind, int force);
06b0d786	351	extern int Grow_reshape(char devname, int fd, int quiet, char backup_file,
e86c9dd6 NB	352	long long size,
e86c9dd6 NB	353	int level, int layout, int chunksize, int raid_disks);
06b0d786 NB	354	extern int Grow_restart(struct supertype st, struct mdinfo info,
06b0d786 NB	355	int fdlist, int cnt, char backup_file);
64c4757e NB	356
64c4757e NB	357
82d9eba6	358	extern int Assemble(struct supertype st, char mddev, int mdfd,
52826846 NB	359	mddev_ident_t ident,
52826846 NB	360	char *conffile,
06b0d786	361	mddev_dev_t devlist, char *backup_file,
64c4757e	362	int readonly, int runstop,
e5eac01f	363	char update, char homehost,
64c4757e NB	364	int verbose, int force);
64c4757e NB	365
b5e64645	366	extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e	367	int raiddisks,
c82f047c	368	mddev_dev_t devlist, int assume_clean,
dab6685f	369	char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e NB	370
64c4757e NB	371
82d9eba6	372	extern int Create(struct supertype st, char mddev, int mdfd,
5dd497ee	373	int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
05697ec1	374	char name, char homehost,
cd29a5c8	375	int subdevs, mddev_dev_t devlist,
47d79ef8	376	int runstop, int verbose, int force, int assume_clean,
dfd4d8ee	377	char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e	378
b6750aa8	379	extern int Detail(char dev, int brief, int test, char homehost);
e0d19036	380	extern int Query(char *dev);
82d9eba6	381	extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
a1cbd7d0	382	struct supertype forcest, char homehost);
cd29a5c8	383	extern int Monitor(mddev_dev_t devlist,
e0d19036	384	char mailaddr, char alert_cmd,
aa88f531	385	int period, int daemonise, int scan, int oneshot,
773135f5	386	int dosyslog, char config, int test, char pidfile);
64c4757e	387
6409687b	388	extern int Kill(char *dev, int force, int quiet);
9a9dab36	389
c82f047c NB	390	extern int CreateBitmap(char *filename, int force, char uuid[16],
c82f047c NB	391	unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee	392	unsigned long write_behind,
dcec9ee5 NB	393	unsigned long long array_size,
dcec9ee5 NB	394	int major);
55935d51	395	extern int ExamineBitmap(char filename, int brief, struct supertype st);
9fca7d62	396	extern int bitmap_update_uuid(int fd, int *uuid);
c82f047c	397
64c4757e	398	extern int md_get_version(int fd);
e0d19036	399	extern int get_linux_version(void);
64c4757e	400	extern int parse_uuid(char *str, int uuid[4]);
682c7051 NB	401	extern int check_ext2(int fd, char *name);
	402	extern int check_reiser(int fd, char *name);
	403	extern int check_raid(int fd, char *name);
64c4757e	404
dd0781e5	405	extern int get_mdp_major(void);
8b0dabea	406	extern int dev_open(char *dev, int flags);
8d80900b	407	extern int is_standard(char dev, int nump);
dd0781e5	408
f1ae21c4	409	extern int parse_auto(char str, char msg, int config);
e0d19036 NB	410	extern mddev_ident_t conf_get_ident(char conffile, char dev);
e0d19036 NB	411	extern mddev_dev_t conf_get_devs(char *conffile);
5bbb4842	412	extern struct createinfo conf_get_create_info(char conffile);
e0d19036	413	extern char conf_get_mailaddr(char conffile);
4948b8f7	414	extern char conf_get_mailfrom(char conffile);
e0d19036	415	extern char conf_get_program(char conffile);
997aed5d	416	extern char conf_get_homehost(char conffile);
e0d19036	417	extern char conf_line(FILE file);
98c6faba	418	extern char conf_word(FILE file, int allow_key);
e0d19036 NB	419	extern void free_line(char *line);
e0d19036 NB	420	extern int match_oneof(char devices, char devname);
e0d19036	421	extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36	422	extern int same_uuid(int a[4], int b[4], int swapuuid);
4b1ac34b NB	423	/* extern int compare_super(mdp_super_t first, mdp_super_t second);*/
4b1ac34b NB	424	extern unsigned long calc_csum(void *super, int bytes);
265e0f17 NB	425	extern int enough(int level, int raid_disks, int layout,
265e0f17 NB	426	char *avail, int avail_disks);
e0d19036	427	extern int ask(char *mesg);
8fac0577	428	extern unsigned long long get_component_size(int fd);
e0d19036	429
cd29a5c8	430
56eb10c0	431	extern char *human_size(long long bytes);
e0d19036 NB	432	char *human_size_brief(long long bytes);
	433
	434	extern void put_md_name(char *name);
	435	extern char *get_md_name(int dev);
	436
c913b90e	437	extern char DefaultConfFile[];
b5e64645 NB	438
	439	extern int open_mddev(char *dev, int autof);
	440
	441
	442	#define LEVEL_MULTIPATH (-4)
	443	#define LEVEL_LINEAR (-1)
	444	#define LEVEL_FAULTY (-5)
	445
	446
	447	/* faulty stuff */
	448
	449	#define WriteTransient 0
	450	#define ReadTransient 1
	451	#define WritePersistent 2
	452	#define ReadPersistent 3
	453	#define WriteAll 4 /* doesn't go to device */
	454	#define ReadFixable 5
	455	#define Modes 6
	456
	457	#define ClearErrors 31
	458	#define ClearFaults 30
	459
	460	#define AllPersist 100 /* internal use only */
	461	#define NoPersist 101
	462
	463	#define ModeMask 0x1f
	464	#define ModeShift 5
fe6729fa NB	465
	466
	467	#ifdef __TINYC__
	468	#undef minor
	469	#undef major
	470	#undef makedev
	471	#define minor(x) ((x)&0xff)
	472	#define major(x) (((x)>>8)&0xff)
	473	#define makedev(M,m) (((M)<<8) \| (m))
	474	#endif
	475
e86c9dd6 NB	476	/* for raid5 */
	477	#define ALGORITHM_LEFT_ASYMMETRIC 0
	478	#define ALGORITHM_RIGHT_ASYMMETRIC 1
	479	#define ALGORITHM_LEFT_SYMMETRIC 2
	480	#define ALGORITHM_RIGHT_SYMMETRIC 3