[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));
#else
# if defined(__NO_STAT64) || __WORDSIZE != 32
# define lseek64 lseek
# endif
#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,
	INCREMENTAL,
	AUTODETECT,
};

extern char short_options[];
extern char short_bitmap_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_incr[],
	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,
	AutoDetect,
};

/* 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);
extern int mddev_busy(int devnum);

struct map_ent {
	struct map_ent *next;
	int	devnum;
	int	major,minor;
	int	uuid[4];
	char	*path;
};
extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
		      int uuid[4], char *path);
extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
extern void map_read(struct map_ent **melp);
extern int map_write(struct map_ent *mel);
extern void map_delete(struct map_ent **mapp, int devnum);
extern void map_free(struct map_ent *map);
extern void map_add(struct map_ent **melp,
		    int devnum, int major, int minor, int uuid[4], char *path);

/* 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;
	int	cache_size;
	int	mismatch_cnt;
	int	major_version, minor_version;
};
/* various details can be requested */
#define	GET_LEVEL	1
#define	GET_LAYOUT	2
#define	GET_COMPONENT	4
#define	GET_CHUNK	8
#define GET_CACHE	16
#define	GET_MISMATCH	32
#define	GET_VERSION	64

#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 void sysfs_free(struct sysarray *sra);
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 (*export_super)(void *sbv);
	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);
	int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name, char *homehost, int *uuid);
	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 *chunkp,
				   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);
extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
			 mdu_disk_info_t *disk);

#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 autodetect(void);
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 *uuid,
		  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 export, 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 Wait(char *dev);

extern int Incremental(char *devname, int verbose, int runstop,
		       struct supertype *st, char *homehost, int autof);
extern void RebuildMap(void);
extern int IncrementalScan(int verbose);

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, int swap);

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 int conf_test_dev(char *devname);
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 void copy_uuid(void *a, 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, int clean,
		   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);
extern int open_mddev_devnum(char *devname, int devnum, char *name,
			     char *chosen_name);


#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));
f783ca4f	34	#else
fffdbe5e	35	# if defined(__NO_STAT64) \|\| __WORDSIZE != 32
f783ca4f NB	36	# define lseek64 lseek
f783ca4f NB	37	# endif
98c6faba	38	#endif
64c4757e NB	39
	40	#include <sys/types.h>
	41	#include <sys/stat.h>
	42	#include <stdlib.h>
	43	#include <time.h>
11018a45	44	#include <sys/time.h>
64c4757e NB	45	#include <getopt.h>
	46	#include <fcntl.h>
	47	#include <stdio.h>
	48	#include <errno.h>
	49	#include <string.h>
773135f5	50	#include <syslog.h>
b56c3630 NB	51	#ifdef __dietlibc__
b56c3630 NB	52	#include <strings.h>
280a927d NB	53	/* dietlibc has deprecated random and srandom!! */
	54	#define random rand
	55	#define srandom srand
98c6faba NB	56	#endif
98c6faba NB	57
64c4757e NB	58
64c4757e NB	59	#include <linux/kdev_t.h>
e0d19036 NB	60	/#include <linux/fs.h> /
	61	#include <sys/mount.h>
	62	#include <asm/types.h>
64c4757e NB	63	#include <sys/ioctl.h>
64c4757e NB	64	#define MD_MAJOR 9
dd0781e5	65	#define MdpMinorShift 6
64c4757e	66
e0d19036	67	#ifndef BLKGETSIZE64
98c6faba	68	#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 arg) /
e0d19036	69	#endif
56eb10c0	70
c82f047c NB	71	#define DEFAULT_BITMAP_CHUNK 4096
c82f047c NB	72	#define DEFAULT_BITMAP_DELAY 5
dfd4d8ee	73	#define DEFAULT_MAX_WRITE_BEHIND 256
64c4757e NB	74
64c4757e NB	75	#include "md_u.h"
e0d19036	76	#include "md_p.h"
c82f047c	77	#include "bitmap.h"
64c4757e	78
1e0d770c	79	#include <endian.h>
efd441d1 NB	80	/* Redhat don't like to #include <asm/byteorder.h>, and
	81	* some time include <linux/byteorder/xxx_endian.h> isn't enough,
	82	* and there is no standard conversion function so... */
0ae03b8a NB	83	/* And dietlibc doesn't think byteswap is ok, so.. */
	84	/* #include <byteswap.h> */
	85	#define bswap_16(x) (((x) & 0x00ffU) << 8 \| \
	86	((x) & 0xff00U) >> 8)
	87	#define bswap_32(x) (((x) & 0x000000ffU) << 24 \| \
	88	((x) & 0xff000000U) >> 24 \| \
	89	((x) & 0x0000ff00U) << 8 \| \
	90	((x) & 0x00ff0000U) >> 8)
	91	#define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 \| \
	92	((x) & 0xff00000000000000ULL) >> 56 \| \
	93	((x) & 0x000000000000ff00ULL) << 40 \| \
	94	((x) & 0x00ff000000000000ULL) >> 40 \| \
	95	((x) & 0x0000000000ff0000ULL) << 24 \| \
	96	((x) & 0x0000ff0000000000ULL) >> 24 \| \
	97	((x) & 0x00000000ff000000ULL) << 8 \| \
	98	((x) & 0x000000ff00000000ULL) >> 8)
	99
efd441d1 NB	100	#if BYTE_ORDER == LITTLE_ENDIAN
	101	#define __cpu_to_le16(_x) (_x)
	102	#define __cpu_to_le32(_x) (_x)
	103	#define __cpu_to_le64(_x) (_x)
	104	#define __le16_to_cpu(_x) (_x)
	105	#define __le32_to_cpu(_x) (_x)
	106	#define __le64_to_cpu(_x) (_x)
	107	#elif BYTE_ORDER == BIG_ENDIAN
	108	#define __cpu_to_le16(_x) bswap_16(_x)
	109	#define __cpu_to_le32(_x) bswap_32(_x)
	110	#define __cpu_to_le64(_x) bswap_64(_x)
	111	#define __le16_to_cpu(_x) bswap_16(_x)
	112	#define __le32_to_cpu(_x) bswap_32(_x)
	113	#define __le64_to_cpu(_x) bswap_64(_x)
1e0d770c NB	114	#else
	115	# error "unknown endianness."
	116	#endif
	117
	118
	119
4b1ac34b NB	120	/* general information that might be extracted from a superblock */
	121	struct mdinfo {
	122	mdu_array_info_t array;
	123	mdu_disk_info_t disk;
	124	__u64 events;
fbf8a0b7	125	int uuid[4];
31317663	126	char name[33];
353632d9 NB	127	unsigned long long data_offset;
	128	unsigned long long component_size;
	129	int reshape_active;
	130	unsigned long long reshape_progress;
	131	int new_level, delta_disks, new_layout, new_chunk;
4b1ac34b NB	132	};
4b1ac34b NB	133
5bbb4842 NB	134	struct createinfo {
	135	int uid;
	136	int gid;
	137	int autof;
	138	int mode;
38098016	139	int symlinks;
058574b1	140	struct supertype *supertype;
5bbb4842 NB	141	};
5bbb4842 NB	142
9a9dab36	143	#define Name "mdadm"
682c7051	144
e0d19036 NB	145	enum mode {
	146	ASSEMBLE=1,
	147	BUILD,
	148	CREATE,
	149	MANAGE,
	150	MISC,
	151	MONITOR,
dd0781e5	152	GROW,
8382f19b	153	INCREMENTAL,
1f48664b	154	AUTODETECT,
e0d19036 NB	155	};
e0d19036 NB	156
64c4757e	157	extern char short_options[];
024768c4	158	extern char short_bitmap_options[];
c06487ce	159	extern char short_bitmap_auto_options[];
64c4757e	160	extern struct option long_options[];
56eedc1a	161	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	162	Help_create[], Help_build[], Help_assemble[], Help_grow[],
8382f19b	163	Help_incr[],
e0d19036	164	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e	165
997aed5d NB	166	/* for option that don't have short equivilents, we assign arbitrary
	167	* small numbers. '1' means an undecorated option, so we start at '2'.
	168	*/
	169	enum special_options {
	170	AssumeClean = 2,
	171	BitmapChunk,
	172	WriteBehind,
	173	ReAdd,
	174	NoDegraded,
	175	Sparc22,
	176	BackupFile,
	177	HomeHost,
589395d6	178	AutoHomeHost,
38098016	179	Symlinks,
1f48664b	180	AutoDetect,
997aed5d NB	181	};
997aed5d NB	182
64c4757e	183	/* structures read from config file */
52826846 NB	184	/* List of mddevice names and identifiers
	185	* Identifiers can be:
	186	* uuid=128-hex-uuid
	187	* super-minor=decimal-minor-number-from-superblock
	188	* devices=comma,separated,list,of,device,names,with,wildcards
	189	*
	190	* If multiple fields are present, the intersection of all matching
	191	* devices is considered
	192	*/
98c6faba	193	#define UnSet (0xfffe)
52826846	194	typedef struct mddev_ident_s {
dd0781e5	195	char *devname;
52826846	196
dd0781e5	197	int uuid_set;
3fa06e9d	198	int uuid[4];
947fd4dd	199	char name[33];
52826846	200
98c6faba	201	unsigned int super_minor;
52826846	202
dd0781e5	203	char devices; / comma separated list of device
52826846 NB	204	* names with wild cards
52826846 NB	205	*/
dd0781e5	206	int level;
98c6faba NB	207	unsigned int raid_disks;
98c6faba NB	208	unsigned int spare_disks;
82d9eba6	209	struct supertype *st;
dd0781e5 NB	210	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	211	char *spare_group;
7ef02d01	212	char *bitmap_file;
c82f047c	213	int bitmap_fd;
dd0781e5	214
52826846 NB	215	struct mddev_ident_s *next;
52826846 NB	216	} *mddev_ident_t;
64c4757e NB	217
	218	/* List of device names - wildcards expanded */
	219	typedef struct mddev_dev_s {
	220	char *devname;
cd29a5c8 NB	221	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	222	* Not set for names read from .config
	223	*/
dfd4d8ee	224	char writemostly;
fe80f49b	225	char re_add;
811e6cbe	226	char used; /* set when used */
64c4757e NB	227	struct mddev_dev_s *next;
	228	} *mddev_dev_t;
	229
682c7051 NB	230	typedef struct mapping {
	231	char *name;
	232	int num;
	233	} mapping_t;
	234
e0d19036 NB	235
	236	struct mdstat_ent {
	237	char *dev;
	238	int devnum;
	239	int active;
	240	char *level;
	241	char pattern; / U or up, _ for down */
	242	int percent; /* -1 if no resync */
e5329c37	243	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	244	struct mdstat_ent *next;
	245	};
	246
22a88995	247	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	248	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	249	extern void mdstat_wait(int seconds);
8382f19b NB	250	extern int mddev_busy(int devnum);
	251
	252	struct map_ent {
	253	struct map_ent *next;
	254	int devnum;
	255	int major,minor;
	256	int uuid[4];
	257	char *path;
	258	};
	259	extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
	260	int uuid[4], char *path);
	261	extern struct map_ent map_by_uuid(struct map_ent *map, int uuid[4]);
	262	extern void map_read(struct map_ent **melp);
	263	extern int map_write(struct map_ent *mel);
	264	extern void map_delete(struct map_ent **mapp, int devnum);
	265	extern void map_free(struct map_ent *map);
	266	extern void map_add(struct map_ent **melp,
	267	int devnum, int major, int minor, int uuid[4], char *path);
e0d19036	268
e86c9dd6 NB	269	/* Data structure for holding info read from sysfs */
	270	struct sysdev {
	271	char name[20];
	272	int role;
	273	int major, minor;
	274	unsigned long long offset, size;
	275	int state;
	276	int errors;
	277	struct sysdev *next;
	278	};
	279	struct sysarray {
	280	char name[20];
	281	struct sysdev *devs;
	282	int chunk;
	283	unsigned long long component_size;
	284	int layout;
	285	int level;
	286	int spares;
758d3a8e	287	int cache_size;
37dfc3d6	288	int mismatch_cnt;
8382f19b	289	int major_version, minor_version;
e86c9dd6 NB	290	};
	291	/* various details can be requested */
	292	#define GET_LEVEL 1
	293	#define GET_LAYOUT 2
	294	#define GET_COMPONENT 4
	295	#define GET_CHUNK 8
758d3a8e	296	#define GET_CACHE 16
37dfc3d6	297	#define GET_MISMATCH 32
8382f19b	298	#define GET_VERSION 64
e86c9dd6 NB	299
	300	#define GET_DEVS 1024 /* gets role, major, minor */
	301	#define GET_OFFSET 2048
	302	#define GET_SIZE 4096
	303	#define GET_STATE 8192
	304	#define GET_ERROR 16384
	305
	306	/* If fd >= 0, get the array it is open on,
	307	* else use devnum. >=0 -> major9. <0.....
	308	*/
8382f19b	309	extern void sysfs_free(struct sysarray *sra);
e86c9dd6 NB	310	extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
	311	extern int sysfs_set_str(struct sysarray sra, struct sysdev dev,
	312	char name, char val);
	313	extern int sysfs_set_num(struct sysarray sra, struct sysdev dev,
	314	char *name, unsigned long long val);
	315	extern int sysfs_get_ll(struct sysarray sra, struct sysdev dev,
	316	char name, unsigned long long val);
	317
	318
	319	extern int save_stripes(int source, unsigned long long offsets,
	320	int raid_disks, int chunk_size, int level, int layout,
	321	int nwrites, int *dest,
	322	unsigned long long start, unsigned long long length);
353632d9 NB	323	extern int restore_stripes(int dest, unsigned long long offsets,
	324	int raid_disks, int chunk_size, int level, int layout,
	325	int source, unsigned long long read_offset,
	326	unsigned long long start, unsigned long long length);
e86c9dd6	327
52826846 NB	328	#ifndef Sendmail
	329	#define Sendmail "/usr/lib/sendmail -t"
	330	#endif
	331
773135f5 NB	332	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	333
682c7051 NB	334	extern char map_num(mapping_t map, int num);
682c7051 NB	335	extern int map_name(mapping_t map, char name);
b5e64645	336	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	337
16c6fa80	338	extern char *map_dev(int major, int minor, int create);
64c4757e NB	339
64c4757e NB	340
f9ce90ba	341	extern struct superswitch {
a1cbd7d0	342	void (examine_super)(void sbv, char *homehost);
f9ce90ba	343	void (brief_examine_super)(void sbv);
b6750aa8	344	void (detail_super)(void sbv, char *homehost);
54bad364	345	void (export_super)(void sbv);
f9ce90ba NB	346	void (brief_detail_super)(void sbv);
f9ce90ba NB	347	void (uuid_from_super)(int uuid[4], void sbv);
31317663	348	void (getinfo_super)(struct mdinfo info, void *sbv);
83b6208e	349	int (match_home)(void sbv, char *homehost);
e5eac01f NB	350	int (update_super)(struct mdinfo info, void sbv, char update,
	351	char *devname, int verbose,
	352	int uuid_set, char *homehost);
3d3dd91e	353	int (init_super)(struct supertype st, void *sbp, mdu_array_info_t info, unsigned long long size, char name, char homehost, int *uuid);
f9ce90ba	354	void (add_to_super)(void sbv, mdu_disk_info_t *dinfo);
96395475	355	int (store_super)(struct supertype st, int fd, void *sbv);
1bf4e2d9	356	int (write_init_super)(struct supertype st, void sbv, mdu_disk_info_t dinfo, char *devname);
f9ce90ba	357	int (compare_super)(void firstp, void secondv);
82d9eba6 NB	358	int (load_super)(struct supertype st, int fd, void *sbp, char devname);
82d9eba6 NB	359	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	360	__u64 (avail_size)(struct supertype st, __u64 size);
199171a2 NB	361	int (add_internal_bitmap)(struct supertype st, void sbv, int chunkp,
199171a2 NB	362	int delay, int write_behind,
f9c25f1d	363	unsigned long long size, int may_change, int major);
f6d75de8	364	void (locate_bitmap)(struct supertype st, int fd, void *sbv);
f5e166fe	365	int (write_bitmap)(struct supertype st, int fd, void *sbv);
82d9eba6	366	int major;
f277ce36	367	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	368	} super0, super1, *superlist[];
	369
	370	struct supertype {
	371	struct superswitch *ss;
	372	int minor_version;
ea329559	373	int max_devs;
82d9eba6	374	};
f9ce90ba	375
82d9eba6 NB	376	extern struct supertype *super_by_version(int vers, int minor);
82d9eba6 NB	377	extern struct supertype *guess_super(int fd);
beae1dfe	378	extern int get_dev_size(int fd, char dname, unsigned long long sizep);
8382f19b NB	379	extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
8382f19b NB	380	mdu_disk_info_t *disk);
f9ce90ba	381
838acbc2 NB	382	#if __GNUC__ < 3
	383	struct stat64;
	384	#endif
	385
45e878bb NB	386	#define HAVE_NFTW we assume
	387	#define HAVE_FTW
	388
173fc515	389	#ifdef UCLIBC
45e878bb NB	390	# include <features.h>
	391	# ifndef __UCLIBC_HAS_FTW__
	392	# undef HAVE_FTW
	393	# undef HAVE_NFTW
	394	# endif
	395	#endif
	396
	397	#ifdef __dietlibc__
	398	# undef HAVE_NFTW
	399	#endif
	400
	401	#ifndef HAVE_NFTW
173fc515	402	# define FTW_PHYS 1
45e878bb NB	403	# ifndef HAVE_FTW
45e878bb NB	404	struct FTW {};
173fc515 NB	405	# endif
	406	#endif
	407
45e878bb NB	408	#ifdef HAVE_FTW
	409	# include <ftw.h>
	410	#endif
	411
173fc515 NB	412	extern int add_dev(const char name, const struct stat stb, int flag, struct FTW *s);
173fc515 NB	413
f9ce90ba	414
64c4757e	415	extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf	416	extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5	417	extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645	418	extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e	419	extern int Manage_subdevs(char *devname, int fd,
dab6685f	420	mddev_dev_t devlist, int verbose);
1f48664b	421	extern int autodetect(void);
e5329c37	422	extern int Grow_Add_device(char devname, int fd, char newdev);
8fac0577	423	extern int Grow_addbitmap(char devname, int fd, char file, int chunk, int delay, int write_behind, int force);
06b0d786	424	extern int Grow_reshape(char devname, int fd, int quiet, char backup_file,
e86c9dd6 NB	425	long long size,
e86c9dd6 NB	426	int level, int layout, int chunksize, int raid_disks);
06b0d786 NB	427	extern int Grow_restart(struct supertype st, struct mdinfo info,
06b0d786 NB	428	int fdlist, int cnt, char backup_file);
64c4757e NB	429
64c4757e NB	430
82d9eba6	431	extern int Assemble(struct supertype st, char mddev, int mdfd,
52826846	432	mddev_ident_t ident,
06b0d786	433	mddev_dev_t devlist, char *backup_file,
64c4757e	434	int readonly, int runstop,
e5eac01f	435	char update, char homehost,
64c4757e NB	436	int verbose, int force);
64c4757e NB	437
b5e64645	438	extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e	439	int raiddisks,
c82f047c	440	mddev_dev_t devlist, int assume_clean,
dab6685f	441	char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e NB	442
64c4757e NB	443
82d9eba6	444	extern int Create(struct supertype st, char mddev, int mdfd,
5dd497ee	445	int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
3d3dd91e	446	char name, char homehost, int *uuid,
cd29a5c8	447	int subdevs, mddev_dev_t devlist,
47d79ef8	448	int runstop, int verbose, int force, int assume_clean,
dfd4d8ee	449	char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e	450
54bad364	451	extern int Detail(char dev, int brief, int export, int test, char homehost);
e0d19036	452	extern int Query(char *dev);
82d9eba6	453	extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
a1cbd7d0	454	struct supertype forcest, char homehost);
cd29a5c8	455	extern int Monitor(mddev_dev_t devlist,
e0d19036	456	char mailaddr, char alert_cmd,
aa88f531	457	int period, int daemonise, int scan, int oneshot,
8aec876d	458	int dosyslog, int test, char *pidfile);
64c4757e	459
6409687b	460	extern int Kill(char *dev, int force, int quiet);
b90c0e9a	461	extern int Wait(char *dev);
9a9dab36	462
8382f19b NB	463	extern int Incremental(char *devname, int verbose, int runstop,
	464	struct supertype st, char homehost, int autof);
	465	extern void RebuildMap(void);
	466	extern int IncrementalScan(int verbose);
	467
c82f047c NB	468	extern int CreateBitmap(char *filename, int force, char uuid[16],
c82f047c NB	469	unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee	470	unsigned long write_behind,
dcec9ee5 NB	471	unsigned long long array_size,
dcec9ee5 NB	472	int major);
55935d51	473	extern int ExamineBitmap(char filename, int brief, struct supertype st);
bf4fb153	474	extern int bitmap_update_uuid(int fd, int *uuid, int swap);
c82f047c	475
64c4757e	476	extern int md_get_version(int fd);
e0d19036	477	extern int get_linux_version(void);
64c4757e	478	extern int parse_uuid(char *str, int uuid[4]);
682c7051 NB	479	extern int check_ext2(int fd, char *name);
	480	extern int check_reiser(int fd, char *name);
	481	extern int check_raid(int fd, char *name);
64c4757e	482
dd0781e5	483	extern int get_mdp_major(void);
8b0dabea	484	extern int dev_open(char *dev, int flags);
8d80900b	485	extern int is_standard(char dev, int nump);
dd0781e5	486
f1ae21c4	487	extern int parse_auto(char str, char msg, int config);
8aec876d NB	488	extern mddev_ident_t conf_get_ident(char *dev);
8aec876d NB	489	extern mddev_dev_t conf_get_devs(void);
8382f19b	490	extern int conf_test_dev(char *devname);
8aec876d NB	491	extern struct createinfo *conf_get_create_info(void);
	492	extern void set_conffile(char *file);
	493	extern char *conf_get_mailaddr(void);
	494	extern char *conf_get_mailfrom(void);
	495	extern char *conf_get_program(void);
	496	extern char *conf_get_homehost(void);
e0d19036	497	extern char conf_line(FILE file);
98c6faba	498	extern char conf_word(FILE file, int allow_key);
e0d19036 NB	499	extern void free_line(char *line);
e0d19036 NB	500	extern int match_oneof(char devices, char devname);
e0d19036	501	extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36	502	extern int same_uuid(int a[4], int b[4], int swapuuid);
350f29f9	503	extern void copy_uuid(void *a, int b[4], int swapuuid);
4b1ac34b NB	504	/* extern int compare_super(mdp_super_t first, mdp_super_t second);*/
4b1ac34b NB	505	extern unsigned long calc_csum(void *super, int bytes);
583315d9	506	extern int enough(int level, int raid_disks, int layout, int clean,
265e0f17	507	char *avail, int avail_disks);
e0d19036	508	extern int ask(char *mesg);
8fac0577	509	extern unsigned long long get_component_size(int fd);
0430ed48	510	extern void remove_partitions(int fd);
e0d19036	511
cd29a5c8	512
56eb10c0	513	extern char *human_size(long long bytes);
e0d19036 NB	514	char *human_size_brief(long long bytes);
	515
	516	extern void put_md_name(char *name);
	517	extern char *get_md_name(int dev);
	518
c913b90e	519	extern char DefaultConfFile[];
b5e64645 NB	520
b5e64645 NB	521	extern int open_mddev(char *dev, int autof);
8382f19b NB	522	extern int open_mddev_devnum(char devname, int devnum, char name,
8382f19b NB	523	char *chosen_name);
b5e64645 NB	524
	525
	526	#define LEVEL_MULTIPATH (-4)
	527	#define LEVEL_LINEAR (-1)
	528	#define LEVEL_FAULTY (-5)
	529
	530
	531	/* faulty stuff */
	532
	533	#define WriteTransient 0
	534	#define ReadTransient 1
	535	#define WritePersistent 2
	536	#define ReadPersistent 3
	537	#define WriteAll 4 /* doesn't go to device */
	538	#define ReadFixable 5
	539	#define Modes 6
	540
	541	#define ClearErrors 31
	542	#define ClearFaults 30
	543
	544	#define AllPersist 100 /* internal use only */
	545	#define NoPersist 101
	546
	547	#define ModeMask 0x1f
	548	#define ModeShift 5
fe6729fa NB	549
	550
	551	#ifdef __TINYC__
	552	#undef minor
	553	#undef major
	554	#undef makedev
	555	#define minor(x) ((x)&0xff)
	556	#define major(x) (((x)>>8)&0xff)
	557	#define makedev(M,m) (((M)<<8) \| (m))
	558	#endif
	559
e86c9dd6 NB	560	/* for raid5 */
	561	#define ALGORITHM_LEFT_ASYMMETRIC 0
	562	#define ALGORITHM_RIGHT_ASYMMETRIC 1
	563	#define ALGORITHM_LEFT_SYMMETRIC 2
	564	#define ALGORITHM_RIGHT_SYMMETRIC 3