[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>
/* 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... */
/* And dietlibc doesn't think byteswap is ok, so.. */
/*  #include <byteswap.h> */
#define bswap_16(x) (((x) & 0x00ffU) << 8 | \
		     ((x) & 0xff00U) >> 8)
#define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
		     ((x) & 0xff000000U) >> 24 | \
		     ((x) & 0x0000ff00U) << 8  | \
		     ((x) & 0x00ff0000U) >> 8)
#define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
		     ((x) & 0xff00000000000000ULL) >> 56 | \
		     ((x) & 0x000000000000ff00ULL) << 40 | \
		     ((x) & 0x00ff000000000000ULL) >> 40 | \
		     ((x) & 0x0000000000ff0000ULL) << 24 | \
		     ((x) & 0x0000ff0000000000ULL) >> 24 | \
		     ((x) & 0x00000000ff000000ULL) << 8 | \
		     ((x) & 0x000000ff00000000ULL) >> 8)

#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;
	int	symlinks;
	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,
	Symlinks,
};

/* 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

#define HAVE_NFTW  we assume
#define HAVE_FTW

#ifdef UCLIBC
# include <features.h>
# ifndef  __UCLIBC_HAS_FTW__
#  undef HAVE_FTW
#  undef HAVE_NFTW
# endif
#endif

#ifdef __dietlibc__
# undef HAVE_NFTW
#endif

#ifndef HAVE_NFTW
# define FTW_PHYS 1
# ifndef HAVE_FTW
  struct FTW {};
# endif
#endif

#ifdef HAVE_FTW
# include <ftw.h>
#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,
		    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, 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 *dev);
extern mddev_dev_t conf_get_devs(void);
extern struct createinfo *conf_get_create_info(void);
extern void set_conffile(char *file);
extern char *conf_get_mailaddr(void);
extern char *conf_get_mailfrom(void);
extern char *conf_get_program(void);
extern char *conf_get_homehost(void);
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 void remove_partitions(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	/* Redhat don't like to #include <asm/byteorder.h>, and
	77	* some time include <linux/byteorder/xxx_endian.h> isn't enough,
	78	* and there is no standard conversion function so... */
0ae03b8a NB	79	/* And dietlibc doesn't think byteswap is ok, so.. */
	80	/* #include <byteswap.h> */
	81	#define bswap_16(x) (((x) & 0x00ffU) << 8 \| \
	82	((x) & 0xff00U) >> 8)
	83	#define bswap_32(x) (((x) & 0x000000ffU) << 24 \| \
	84	((x) & 0xff000000U) >> 24 \| \
	85	((x) & 0x0000ff00U) << 8 \| \
	86	((x) & 0x00ff0000U) >> 8)
	87	#define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 \| \
	88	((x) & 0xff00000000000000ULL) >> 56 \| \
	89	((x) & 0x000000000000ff00ULL) << 40 \| \
	90	((x) & 0x00ff000000000000ULL) >> 40 \| \
	91	((x) & 0x0000000000ff0000ULL) << 24 \| \
	92	((x) & 0x0000ff0000000000ULL) >> 24 \| \
	93	((x) & 0x00000000ff000000ULL) << 8 \| \
	94	((x) & 0x000000ff00000000ULL) >> 8)
	95
efd441d1 NB	96	#if BYTE_ORDER == LITTLE_ENDIAN
	97	#define __cpu_to_le16(_x) (_x)
	98	#define __cpu_to_le32(_x) (_x)
	99	#define __cpu_to_le64(_x) (_x)
	100	#define __le16_to_cpu(_x) (_x)
	101	#define __le32_to_cpu(_x) (_x)
	102	#define __le64_to_cpu(_x) (_x)
	103	#elif BYTE_ORDER == BIG_ENDIAN
	104	#define __cpu_to_le16(_x) bswap_16(_x)
	105	#define __cpu_to_le32(_x) bswap_32(_x)
	106	#define __cpu_to_le64(_x) bswap_64(_x)
	107	#define __le16_to_cpu(_x) bswap_16(_x)
	108	#define __le32_to_cpu(_x) bswap_32(_x)
	109	#define __le64_to_cpu(_x) bswap_64(_x)
1e0d770c NB	110	#else
	111	# error "unknown endianness."
	112	#endif
	113
	114
	115
4b1ac34b NB	116	/* general information that might be extracted from a superblock */
	117	struct mdinfo {
	118	mdu_array_info_t array;
	119	mdu_disk_info_t disk;
	120	__u64 events;
fbf8a0b7	121	int uuid[4];
31317663	122	char name[33];
353632d9 NB	123	unsigned long long data_offset;
	124	unsigned long long component_size;
	125	int reshape_active;
	126	unsigned long long reshape_progress;
	127	int new_level, delta_disks, new_layout, new_chunk;
4b1ac34b NB	128	};
4b1ac34b NB	129
5bbb4842 NB	130	struct createinfo {
	131	int uid;
	132	int gid;
	133	int autof;
	134	int mode;
38098016	135	int symlinks;
058574b1	136	struct supertype *supertype;
5bbb4842 NB	137	};
5bbb4842 NB	138
9a9dab36	139	#define Name "mdadm"
682c7051	140
e0d19036 NB	141	enum mode {
	142	ASSEMBLE=1,
	143	BUILD,
	144	CREATE,
	145	MANAGE,
	146	MISC,
	147	MONITOR,
dd0781e5	148	GROW,
e0d19036 NB	149	};
e0d19036 NB	150
64c4757e	151	extern char short_options[];
c06487ce	152	extern char short_bitmap_auto_options[];
64c4757e	153	extern struct option long_options[];
56eedc1a	154	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	155	Help_create[], Help_build[], Help_assemble[], Help_grow[],
e0d19036	156	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e	157
997aed5d NB	158	/* for option that don't have short equivilents, we assign arbitrary
	159	* small numbers. '1' means an undecorated option, so we start at '2'.
	160	*/
	161	enum special_options {
	162	AssumeClean = 2,
	163	BitmapChunk,
	164	WriteBehind,
	165	ReAdd,
	166	NoDegraded,
	167	Sparc22,
	168	BackupFile,
	169	HomeHost,
589395d6	170	AutoHomeHost,
38098016	171	Symlinks,
997aed5d NB	172	};
997aed5d NB	173
64c4757e	174	/* structures read from config file */
52826846 NB	175	/* List of mddevice names and identifiers
	176	* Identifiers can be:
	177	* uuid=128-hex-uuid
	178	* super-minor=decimal-minor-number-from-superblock
	179	* devices=comma,separated,list,of,device,names,with,wildcards
	180	*
	181	* If multiple fields are present, the intersection of all matching
	182	* devices is considered
	183	*/
98c6faba	184	#define UnSet (0xfffe)
52826846	185	typedef struct mddev_ident_s {
dd0781e5	186	char *devname;
52826846	187
dd0781e5	188	int uuid_set;
3fa06e9d	189	int uuid[4];
947fd4dd	190	char name[33];
52826846	191
98c6faba	192	unsigned int super_minor;
52826846	193
dd0781e5	194	char devices; / comma separated list of device
52826846 NB	195	* names with wild cards
52826846 NB	196	*/
dd0781e5	197	int level;
98c6faba NB	198	unsigned int raid_disks;
98c6faba NB	199	unsigned int spare_disks;
82d9eba6	200	struct supertype *st;
dd0781e5 NB	201	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	202	char *spare_group;
7ef02d01	203	char *bitmap_file;
c82f047c	204	int bitmap_fd;
dd0781e5	205
52826846 NB	206	struct mddev_ident_s *next;
52826846 NB	207	} *mddev_ident_t;
64c4757e NB	208
	209	/* List of device names - wildcards expanded */
	210	typedef struct mddev_dev_s {
	211	char *devname;
cd29a5c8 NB	212	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	213	* Not set for names read from .config
	214	*/
dfd4d8ee	215	char writemostly;
fe80f49b	216	char re_add;
811e6cbe	217	char used; /* set when used */
64c4757e NB	218	struct mddev_dev_s *next;
	219	} *mddev_dev_t;
	220
682c7051 NB	221	typedef struct mapping {
	222	char *name;
	223	int num;
	224	} mapping_t;
	225
e0d19036 NB	226
	227	struct mdstat_ent {
	228	char *dev;
	229	int devnum;
	230	int active;
	231	char *level;
	232	char pattern; / U or up, _ for down */
	233	int percent; /* -1 if no resync */
e5329c37	234	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	235	struct mdstat_ent *next;
	236	};
	237
22a88995	238	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	239	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	240	extern void mdstat_wait(int seconds);
e0d19036	241
e86c9dd6 NB	242	/* Data structure for holding info read from sysfs */
	243	struct sysdev {
	244	char name[20];
	245	int role;
	246	int major, minor;
	247	unsigned long long offset, size;
	248	int state;
	249	int errors;
	250	struct sysdev *next;
	251	};
	252	struct sysarray {
	253	char name[20];
	254	struct sysdev *devs;
	255	int chunk;
	256	unsigned long long component_size;
	257	int layout;
	258	int level;
	259	int spares;
	260	};
	261	/* various details can be requested */
	262	#define GET_LEVEL 1
	263	#define GET_LAYOUT 2
	264	#define GET_COMPONENT 4
	265	#define GET_CHUNK 8
	266
	267	#define GET_DEVS 1024 /* gets role, major, minor */
	268	#define GET_OFFSET 2048
	269	#define GET_SIZE 4096
	270	#define GET_STATE 8192
	271	#define GET_ERROR 16384
	272
	273	/* If fd >= 0, get the array it is open on,
	274	* else use devnum. >=0 -> major9. <0.....
	275	*/
	276	extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
	277	extern int sysfs_set_str(struct sysarray sra, struct sysdev dev,
	278	char name, char val);
	279	extern int sysfs_set_num(struct sysarray sra, struct sysdev dev,
	280	char *name, unsigned long long val);
	281	extern int sysfs_get_ll(struct sysarray sra, struct sysdev dev,
	282	char name, unsigned long long val);
	283
	284
	285	extern int save_stripes(int source, unsigned long long offsets,
	286	int raid_disks, int chunk_size, int level, int layout,
	287	int nwrites, int *dest,
	288	unsigned long long start, unsigned long long length);
353632d9 NB	289	extern int restore_stripes(int dest, unsigned long long offsets,
	290	int raid_disks, int chunk_size, int level, int layout,
	291	int source, unsigned long long read_offset,
	292	unsigned long long start, unsigned long long length);
e86c9dd6	293
52826846 NB	294	#ifndef Sendmail
	295	#define Sendmail "/usr/lib/sendmail -t"
	296	#endif
	297
773135f5 NB	298	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	299
682c7051 NB	300	extern char map_num(mapping_t map, int num);
682c7051 NB	301	extern int map_name(mapping_t map, char name);
b5e64645	302	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	303
16c6fa80	304	extern char *map_dev(int major, int minor, int create);
64c4757e NB	305
64c4757e NB	306
f9ce90ba	307	extern struct superswitch {
a1cbd7d0	308	void (examine_super)(void sbv, char *homehost);
f9ce90ba	309	void (brief_examine_super)(void sbv);
b6750aa8	310	void (detail_super)(void sbv, char *homehost);
f9ce90ba NB	311	void (brief_detail_super)(void sbv);
f9ce90ba NB	312	void (uuid_from_super)(int uuid[4], void sbv);
31317663	313	void (getinfo_super)(struct mdinfo info, void *sbv);
83b6208e	314	int (match_home)(void sbv, char *homehost);
e5eac01f NB	315	int (update_super)(struct mdinfo info, void sbv, char update,
	316	char *devname, int verbose,
	317	int uuid_set, char *homehost);
f9ce90ba	318	__u64 (event_super)(void sbv);
05697ec1	319	int (init_super)(struct supertype st, void *sbp, mdu_array_info_t info, unsigned long long size, char name, char homehost);
f9ce90ba	320	void (add_to_super)(void sbv, mdu_disk_info_t *dinfo);
96395475	321	int (store_super)(struct supertype st, int fd, void *sbv);
1bf4e2d9	322	int (write_init_super)(struct supertype st, void sbv, mdu_disk_info_t dinfo, char *devname);
f9ce90ba	323	int (compare_super)(void firstp, void secondv);
82d9eba6 NB	324	int (load_super)(struct supertype st, int fd, void *sbp, char devname);
82d9eba6 NB	325	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	326	__u64 (avail_size)(struct supertype st, __u64 size);
f9c25f1d NB	327	int (add_internal_bitmap)(struct supertype st, void *sbv, int chunk, int delay, int write_behind,
f9c25f1d NB	328	unsigned long long size, int may_change, int major);
f6d75de8	329	void (locate_bitmap)(struct supertype st, int fd, void *sbv);
f5e166fe	330	int (write_bitmap)(struct supertype st, int fd, void *sbv);
82d9eba6	331	int major;
f277ce36	332	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	333	} super0, super1, *superlist[];
	334
	335	struct supertype {
	336	struct superswitch *ss;
	337	int minor_version;
ea329559	338	int max_devs;
82d9eba6	339	};
f9ce90ba	340
82d9eba6 NB	341	extern struct supertype *super_by_version(int vers, int minor);
82d9eba6 NB	342	extern struct supertype *guess_super(int fd);
f9ce90ba	343
838acbc2 NB	344	#if __GNUC__ < 3
	345	struct stat64;
	346	#endif
	347
45e878bb NB	348	#define HAVE_NFTW we assume
	349	#define HAVE_FTW
	350
173fc515	351	#ifdef UCLIBC
45e878bb NB	352	# include <features.h>
	353	# ifndef __UCLIBC_HAS_FTW__
	354	# undef HAVE_FTW
	355	# undef HAVE_NFTW
	356	# endif
	357	#endif
	358
	359	#ifdef __dietlibc__
	360	# undef HAVE_NFTW
	361	#endif
	362
	363	#ifndef HAVE_NFTW
173fc515	364	# define FTW_PHYS 1
45e878bb NB	365	# ifndef HAVE_FTW
45e878bb NB	366	struct FTW {};
173fc515 NB	367	# endif
	368	#endif
	369
45e878bb NB	370	#ifdef HAVE_FTW
	371	# include <ftw.h>
	372	#endif
	373
173fc515 NB	374	extern int add_dev(const char name, const struct stat stb, int flag, struct FTW *s);
173fc515 NB	375
f9ce90ba	376
64c4757e	377	extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf	378	extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5	379	extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645	380	extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e	381	extern int Manage_subdevs(char *devname, int fd,
dab6685f	382	mddev_dev_t devlist, int verbose);
e5329c37	383	extern int Grow_Add_device(char devname, int fd, char newdev);
8fac0577	384	extern int Grow_addbitmap(char devname, int fd, char file, int chunk, int delay, int write_behind, int force);
06b0d786	385	extern int Grow_reshape(char devname, int fd, int quiet, char backup_file,
e86c9dd6 NB	386	long long size,
e86c9dd6 NB	387	int level, int layout, int chunksize, int raid_disks);
06b0d786 NB	388	extern int Grow_restart(struct supertype st, struct mdinfo info,
06b0d786 NB	389	int fdlist, int cnt, char backup_file);
64c4757e NB	390
64c4757e NB	391
82d9eba6	392	extern int Assemble(struct supertype st, char mddev, int mdfd,
52826846	393	mddev_ident_t ident,
06b0d786	394	mddev_dev_t devlist, char *backup_file,
64c4757e	395	int readonly, int runstop,
e5eac01f	396	char update, char homehost,
64c4757e NB	397	int verbose, int force);
64c4757e NB	398
b5e64645	399	extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e	400	int raiddisks,
c82f047c	401	mddev_dev_t devlist, int assume_clean,
dab6685f	402	char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e NB	403
64c4757e NB	404
82d9eba6	405	extern int Create(struct supertype st, char mddev, int mdfd,
5dd497ee	406	int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
05697ec1	407	char name, char homehost,
cd29a5c8	408	int subdevs, mddev_dev_t devlist,
47d79ef8	409	int runstop, int verbose, int force, int assume_clean,
dfd4d8ee	410	char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e	411
b6750aa8	412	extern int Detail(char dev, int brief, int test, char homehost);
e0d19036	413	extern int Query(char *dev);
82d9eba6	414	extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
a1cbd7d0	415	struct supertype forcest, char homehost);
cd29a5c8	416	extern int Monitor(mddev_dev_t devlist,
e0d19036	417	char mailaddr, char alert_cmd,
aa88f531	418	int period, int daemonise, int scan, int oneshot,
8aec876d	419	int dosyslog, int test, char *pidfile);
64c4757e	420
6409687b	421	extern int Kill(char *dev, int force, int quiet);
9a9dab36	422
c82f047c NB	423	extern int CreateBitmap(char *filename, int force, char uuid[16],
c82f047c NB	424	unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee	425	unsigned long write_behind,
dcec9ee5 NB	426	unsigned long long array_size,
dcec9ee5 NB	427	int major);
55935d51	428	extern int ExamineBitmap(char filename, int brief, struct supertype st);
9fca7d62	429	extern int bitmap_update_uuid(int fd, int *uuid);
c82f047c	430
64c4757e	431	extern int md_get_version(int fd);
e0d19036	432	extern int get_linux_version(void);
64c4757e	433	extern int parse_uuid(char *str, int uuid[4]);
682c7051 NB	434	extern int check_ext2(int fd, char *name);
	435	extern int check_reiser(int fd, char *name);
	436	extern int check_raid(int fd, char *name);
64c4757e	437
dd0781e5	438	extern int get_mdp_major(void);
8b0dabea	439	extern int dev_open(char *dev, int flags);
8d80900b	440	extern int is_standard(char dev, int nump);
dd0781e5	441
f1ae21c4	442	extern int parse_auto(char str, char msg, int config);
8aec876d NB	443	extern mddev_ident_t conf_get_ident(char *dev);
	444	extern mddev_dev_t conf_get_devs(void);
	445	extern struct createinfo *conf_get_create_info(void);
	446	extern void set_conffile(char *file);
	447	extern char *conf_get_mailaddr(void);
	448	extern char *conf_get_mailfrom(void);
	449	extern char *conf_get_program(void);
	450	extern char *conf_get_homehost(void);
e0d19036	451	extern char conf_line(FILE file);
98c6faba	452	extern char conf_word(FILE file, int allow_key);
e0d19036 NB	453	extern void free_line(char *line);
e0d19036 NB	454	extern int match_oneof(char devices, char devname);
e0d19036	455	extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36	456	extern int same_uuid(int a[4], int b[4], int swapuuid);
4b1ac34b NB	457	/* extern int compare_super(mdp_super_t first, mdp_super_t second);*/
4b1ac34b NB	458	extern unsigned long calc_csum(void *super, int bytes);
265e0f17 NB	459	extern int enough(int level, int raid_disks, int layout,
265e0f17 NB	460	char *avail, int avail_disks);
e0d19036	461	extern int ask(char *mesg);
8fac0577	462	extern unsigned long long get_component_size(int fd);
0430ed48	463	extern void remove_partitions(int fd);
e0d19036	464
cd29a5c8	465
56eb10c0	466	extern char *human_size(long long bytes);
e0d19036 NB	467	char *human_size_brief(long long bytes);
	468
	469	extern void put_md_name(char *name);
	470	extern char *get_md_name(int dev);
	471
c913b90e	472	extern char DefaultConfFile[];
b5e64645 NB	473
	474	extern int open_mddev(char *dev, int autof);
	475
	476
	477	#define LEVEL_MULTIPATH (-4)
	478	#define LEVEL_LINEAR (-1)
	479	#define LEVEL_FAULTY (-5)
	480
	481
	482	/* faulty stuff */
	483
	484	#define WriteTransient 0
	485	#define ReadTransient 1
	486	#define WritePersistent 2
	487	#define ReadPersistent 3
	488	#define WriteAll 4 /* doesn't go to device */
	489	#define ReadFixable 5
	490	#define Modes 6
	491
	492	#define ClearErrors 31
	493	#define ClearFaults 30
	494
	495	#define AllPersist 100 /* internal use only */
	496	#define NoPersist 101
	497
	498	#define ModeMask 0x1f
	499	#define ModeShift 5
fe6729fa NB	500
	501
	502	#ifdef __TINYC__
	503	#undef minor
	504	#undef major
	505	#undef makedev
	506	#define minor(x) ((x)&0xff)
	507	#define major(x) (((x)>>8)&0xff)
	508	#define makedev(M,m) (((M)<<8) \| (m))
	509	#endif
	510
e86c9dd6 NB	511	/* for raid5 */
	512	#define ALGORITHM_LEFT_ASYMMETRIC 0
	513	#define ALGORITHM_RIGHT_ASYMMETRIC 1
	514	#define ALGORITHM_LEFT_SYMMETRIC 2
	515	#define ALGORITHM_RIGHT_SYMMETRIC 3