[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>
#if !defined(__dietlibc__) && !defined(__KLIBC__)
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 !defined(__KLIBC__)
#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
#endif /* __KLIBC__ */


/* 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;
	int			errors;
	int			cache_size; /* size of raid456 stripe cache*/
	int			mismatch_cnt;
	char			text_version[50];

	char 		sys_name[20];
	struct mdinfo *devs;
	struct mdinfo *next;
};

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);

/* 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 mdinfo *sra);
extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
			 char *name, char *val);
extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
			 char *name, unsigned long long val);
extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *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)(struct supertype *st, char *homehost);
	void (*brief_examine_super)(struct supertype *st);
	void (*detail_super)(struct supertype *st, char *homehost);
	void (*export_super)(struct supertype *st);
	void (*brief_detail_super)(struct supertype *st);
	void (*uuid_from_super)(struct supertype *st, int uuid[4]);
	void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
	int (*match_home)(struct supertype *st, char *homehost);
	int (*update_super)(struct supertype *st, struct mdinfo *info,
			    char *update,
			    char *devname, int verbose,
			    int uuid_set, char *homehost);
	int (*init_super)(struct supertype *st, mdu_array_info_t *info,
			  unsigned long long size, char *name,
			  char *homehost, int *uuid);
	void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo);
	int (*store_super)(struct supertype *st, int fd);
	int (*write_init_super)(struct supertype *st, mdu_disk_info_t *dinfo,
				char *devname);
	int (*compare_super)(struct supertype *st, struct supertype *tst);
	int (*load_super)(struct supertype *st, int fd, char *devname);
	struct supertype * (*match_metadata_desc)(char *arg);
	__u64 (*avail_size)(struct supertype *st, __u64 size);
	int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
				   int delay, int write_behind,
				   unsigned long long size, int may_change, int major);
	void (*locate_bitmap)(struct supertype *st, int fd);
	int (*write_bitmap)(struct supertype *st, int fd);
	void (*free_super)(struct supertype *st);
	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;
	void *sb;
};

extern struct supertype *super_by_fd(int fd);
extern struct supertype *guess_super(int fd);
extern struct supertype *dup_super(struct supertype *st);
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

#if defined(__KLIBC__)
# undef HAVE_NFTW
# undef HAVE_FTW
#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 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>
e39b673e	32	#if !defined(__dietlibc__) && !defined(__KLIBC__)
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
e39b673e	100	#if !defined(__KLIBC__)
efd441d1 NB	101	#if BYTE_ORDER == LITTLE_ENDIAN
	102	#define __cpu_to_le16(_x) (_x)
	103	#define __cpu_to_le32(_x) (_x)
	104	#define __cpu_to_le64(_x) (_x)
	105	#define __le16_to_cpu(_x) (_x)
	106	#define __le32_to_cpu(_x) (_x)
	107	#define __le64_to_cpu(_x) (_x)
	108	#elif BYTE_ORDER == BIG_ENDIAN
	109	#define __cpu_to_le16(_x) bswap_16(_x)
	110	#define __cpu_to_le32(_x) bswap_32(_x)
	111	#define __cpu_to_le64(_x) bswap_64(_x)
	112	#define __le16_to_cpu(_x) bswap_16(_x)
	113	#define __le32_to_cpu(_x) bswap_32(_x)
	114	#define __le64_to_cpu(_x) bswap_64(_x)
1e0d770c NB	115	#else
	116	# error "unknown endianness."
	117	#endif
e39b673e	118	#endif /* __KLIBC__ */
1e0d770c NB	119
	120
	121
4b1ac34b NB	122	/* general information that might be extracted from a superblock */
	123	struct mdinfo {
	124	mdu_array_info_t array;
	125	mdu_disk_info_t disk;
	126	__u64 events;
fbf8a0b7	127	int uuid[4];
31317663	128	char name[33];
353632d9 NB	129	unsigned long long data_offset;
	130	unsigned long long component_size;
	131	int reshape_active;
	132	unsigned long long reshape_progress;
	133	int new_level, delta_disks, new_layout, new_chunk;
06c7f68e	134	int errors;
7e0f6979 NB	135	int cache_size; /* size of raid456 stripe cache*/
	136	int mismatch_cnt;
	137	char text_version[50];
06c7f68e NB	138
06c7f68e NB	139	char sys_name[20];
7e0f6979	140	struct mdinfo *devs;
06c7f68e	141	struct mdinfo *next;
4b1ac34b NB	142	};
4b1ac34b NB	143
5bbb4842 NB	144	struct createinfo {
	145	int uid;
	146	int gid;
	147	int autof;
	148	int mode;
38098016	149	int symlinks;
058574b1	150	struct supertype *supertype;
5bbb4842 NB	151	};
5bbb4842 NB	152
9a9dab36	153	#define Name "mdadm"
682c7051	154
e0d19036 NB	155	enum mode {
	156	ASSEMBLE=1,
	157	BUILD,
	158	CREATE,
	159	MANAGE,
	160	MISC,
	161	MONITOR,
dd0781e5	162	GROW,
8382f19b	163	INCREMENTAL,
1f48664b	164	AUTODETECT,
e0d19036 NB	165	};
e0d19036 NB	166
64c4757e	167	extern char short_options[];
024768c4	168	extern char short_bitmap_options[];
c06487ce	169	extern char short_bitmap_auto_options[];
64c4757e	170	extern struct option long_options[];
56eedc1a	171	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	172	Help_create[], Help_build[], Help_assemble[], Help_grow[],
8382f19b	173	Help_incr[],
e0d19036	174	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e	175
997aed5d NB	176	/* for option that don't have short equivilents, we assign arbitrary
	177	* small numbers. '1' means an undecorated option, so we start at '2'.
	178	*/
	179	enum special_options {
	180	AssumeClean = 2,
	181	BitmapChunk,
	182	WriteBehind,
	183	ReAdd,
	184	NoDegraded,
	185	Sparc22,
	186	BackupFile,
	187	HomeHost,
589395d6	188	AutoHomeHost,
38098016	189	Symlinks,
1f48664b	190	AutoDetect,
997aed5d NB	191	};
997aed5d NB	192
64c4757e	193	/* structures read from config file */
52826846 NB	194	/* List of mddevice names and identifiers
	195	* Identifiers can be:
	196	* uuid=128-hex-uuid
	197	* super-minor=decimal-minor-number-from-superblock
	198	* devices=comma,separated,list,of,device,names,with,wildcards
	199	*
	200	* If multiple fields are present, the intersection of all matching
	201	* devices is considered
	202	*/
98c6faba	203	#define UnSet (0xfffe)
52826846	204	typedef struct mddev_ident_s {
dd0781e5	205	char *devname;
aba69144	206
dd0781e5	207	int uuid_set;
3fa06e9d	208	int uuid[4];
947fd4dd	209	char name[33];
52826846	210
98c6faba	211	unsigned int super_minor;
52826846	212
dd0781e5	213	char devices; / comma separated list of device
52826846 NB	214	* names with wild cards
52826846 NB	215	*/
dd0781e5	216	int level;
98c6faba NB	217	unsigned int raid_disks;
98c6faba NB	218	unsigned int spare_disks;
82d9eba6	219	struct supertype *st;
dd0781e5 NB	220	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	221	char *spare_group;
7ef02d01	222	char *bitmap_file;
c82f047c	223	int bitmap_fd;
dd0781e5	224
52826846 NB	225	struct mddev_ident_s *next;
52826846 NB	226	} *mddev_ident_t;
64c4757e NB	227
	228	/* List of device names - wildcards expanded */
	229	typedef struct mddev_dev_s {
	230	char *devname;
cd29a5c8 NB	231	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	232	* Not set for names read from .config
	233	*/
dfd4d8ee	234	char writemostly;
fe80f49b	235	char re_add;
811e6cbe	236	char used; /* set when used */
64c4757e NB	237	struct mddev_dev_s *next;
	238	} *mddev_dev_t;
	239
682c7051 NB	240	typedef struct mapping {
	241	char *name;
	242	int num;
	243	} mapping_t;
	244
e0d19036 NB	245
	246	struct mdstat_ent {
	247	char *dev;
	248	int devnum;
	249	int active;
	250	char *level;
	251	char pattern; / U or up, _ for down */
	252	int percent; /* -1 if no resync */
e5329c37	253	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	254	struct mdstat_ent *next;
	255	};
	256
22a88995	257	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	258	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	259	extern void mdstat_wait(int seconds);
8382f19b NB	260	extern int mddev_busy(int devnum);
	261
	262	struct map_ent {
	263	struct map_ent *next;
	264	int devnum;
	265	int major,minor;
	266	int uuid[4];
	267	char *path;
	268	};
	269	extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
	270	int uuid[4], char *path);
	271	extern struct map_ent map_by_uuid(struct map_ent *map, int uuid[4]);
	272	extern void map_read(struct map_ent **melp);
	273	extern int map_write(struct map_ent *mel);
	274	extern void map_delete(struct map_ent **mapp, int devnum);
	275	extern void map_free(struct map_ent *map);
	276	extern void map_add(struct map_ent **melp,
	277	int devnum, int major, int minor, int uuid[4], char *path);
e0d19036	278
e86c9dd6 NB	279	/* various details can be requested */
	280	#define GET_LEVEL 1
	281	#define GET_LAYOUT 2
	282	#define GET_COMPONENT 4
	283	#define GET_CHUNK 8
758d3a8e	284	#define GET_CACHE 16
37dfc3d6	285	#define GET_MISMATCH 32
8382f19b	286	#define GET_VERSION 64
e86c9dd6 NB	287
	288	#define GET_DEVS 1024 /* gets role, major, minor */
	289	#define GET_OFFSET 2048
	290	#define GET_SIZE 4096
	291	#define GET_STATE 8192
	292	#define GET_ERROR 16384
	293
	294	/* If fd >= 0, get the array it is open on,
	295	* else use devnum. >=0 -> major9. <0.....
	296	*/
7e0f6979 NB	297	extern void sysfs_free(struct mdinfo *sra);
	298	extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
	299	extern int sysfs_set_str(struct mdinfo sra, struct mdinfo dev,
e86c9dd6	300	char name, char val);
7e0f6979	301	extern int sysfs_set_num(struct mdinfo sra, struct mdinfo dev,
e86c9dd6	302	char *name, unsigned long long val);
7e0f6979	303	extern int sysfs_get_ll(struct mdinfo sra, struct mdinfo dev,
e86c9dd6 NB	304	char name, unsigned long long val);
	305
	306
	307	extern int save_stripes(int source, unsigned long long offsets,
	308	int raid_disks, int chunk_size, int level, int layout,
	309	int nwrites, int *dest,
	310	unsigned long long start, unsigned long long length);
353632d9 NB	311	extern int restore_stripes(int dest, unsigned long long offsets,
	312	int raid_disks, int chunk_size, int level, int layout,
	313	int source, unsigned long long read_offset,
	314	unsigned long long start, unsigned long long length);
e86c9dd6	315
52826846 NB	316	#ifndef Sendmail
	317	#define Sendmail "/usr/lib/sendmail -t"
	318	#endif
	319
773135f5 NB	320	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	321
682c7051 NB	322	extern char map_num(mapping_t map, int num);
682c7051 NB	323	extern int map_name(mapping_t map, char name);
b5e64645	324	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	325
16c6fa80	326	extern char *map_dev(int major, int minor, int create);
64c4757e NB	327
64c4757e NB	328
f9ce90ba	329	extern struct superswitch {
3da92f27 NB	330	void (examine_super)(struct supertype st, char *homehost);
	331	void (brief_examine_super)(struct supertype st);
	332	void (detail_super)(struct supertype st, char *homehost);
	333	void (export_super)(struct supertype st);
	334	void (brief_detail_super)(struct supertype st);
	335	void (uuid_from_super)(struct supertype st, int uuid[4]);
	336	void (getinfo_super)(struct supertype st, struct mdinfo *info);
	337	int (match_home)(struct supertype st, char *homehost);
68c7d6d7	338	int (update_super)(struct supertype st, struct mdinfo *info,
3da92f27	339	char *update,
e5eac01f NB	340	char *devname, int verbose,
e5eac01f NB	341	int uuid_set, char *homehost);
3da92f27 NB	342	int (init_super)(struct supertype st, mdu_array_info_t *info,
	343	unsigned long long size, char *name,
	344	char homehost, int uuid);
	345	void (add_to_super)(struct supertype st, mdu_disk_info_t *dinfo);
	346	int (store_super)(struct supertype st, int fd);
	347	int (write_init_super)(struct supertype st, mdu_disk_info_t *dinfo,
	348	char *devname);
64557c33	349	int (compare_super)(struct supertype st, struct supertype *tst);
3da92f27	350	int (load_super)(struct supertype st, int fd, char *devname);
82d9eba6	351	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	352	__u64 (avail_size)(struct supertype st, __u64 size);
3da92f27	353	int (add_internal_bitmap)(struct supertype st, int *chunkp,
199171a2	354	int delay, int write_behind,
f9c25f1d	355	unsigned long long size, int may_change, int major);
3da92f27 NB	356	void (locate_bitmap)(struct supertype st, int fd);
	357	int (write_bitmap)(struct supertype st, int fd);
	358	void (free_super)(struct supertype st);
82d9eba6	359	int major;
f277ce36	360	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	361	} super0, super1, *superlist[];
	362
	363	struct supertype {
	364	struct superswitch *ss;
	365	int minor_version;
ea329559	366	int max_devs;
64557c33	367	void *sb;
82d9eba6	368	};
f9ce90ba	369
1686dc25	370	extern struct supertype *super_by_fd(int fd);
82d9eba6	371	extern struct supertype *guess_super(int fd);
3da92f27	372	extern struct supertype dup_super(struct supertype st);
beae1dfe	373	extern int get_dev_size(int fd, char dname, unsigned long long sizep);
8382f19b NB	374	extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
8382f19b NB	375	mdu_disk_info_t *disk);
f9ce90ba	376
838acbc2 NB	377	#if __GNUC__ < 3
	378	struct stat64;
	379	#endif
	380
45e878bb NB	381	#define HAVE_NFTW we assume
	382	#define HAVE_FTW
	383
173fc515	384	#ifdef UCLIBC
45e878bb NB	385	# include <features.h>
	386	# ifndef __UCLIBC_HAS_FTW__
	387	# undef HAVE_FTW
	388	# undef HAVE_NFTW
	389	# endif
	390	#endif
	391
	392	#ifdef __dietlibc__
	393	# undef HAVE_NFTW
	394	#endif
	395
e39b673e	396	#if defined(__KLIBC__)
	397	# undef HAVE_NFTW
	398	# undef HAVE_FTW
	399	#endif
	400
45e878bb	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	504	extern unsigned long calc_csum(void *super, int bytes);
583315d9	505	extern int enough(int level, int raid_disks, int layout, int clean,
265e0f17	506	char *avail, int avail_disks);
e0d19036	507	extern int ask(char *mesg);
8fac0577	508	extern unsigned long long get_component_size(int fd);
0430ed48	509	extern void remove_partitions(int fd);
e0d19036	510
cd29a5c8	511
56eb10c0	512	extern char *human_size(long long bytes);
e0d19036 NB	513	char *human_size_brief(long long bytes);
	514
	515	extern void put_md_name(char *name);
	516	extern char *get_md_name(int dev);
	517
c913b90e	518	extern char DefaultConfFile[];
b5e64645 NB	519
b5e64645 NB	520	extern int open_mddev(char *dev, int autof);
8382f19b NB	521	extern int open_mddev_devnum(char devname, int devnum, char name,
8382f19b NB	522	char *chosen_name);
b5e64645 NB	523
	524
	525	#define LEVEL_MULTIPATH (-4)
	526	#define LEVEL_LINEAR (-1)
	527	#define LEVEL_FAULTY (-5)
	528
	529
	530	/* faulty stuff */
	531
	532	#define WriteTransient 0
	533	#define ReadTransient 1
	534	#define WritePersistent 2
	535	#define ReadPersistent 3
	536	#define WriteAll 4 /* doesn't go to device */
	537	#define ReadFixable 5
	538	#define Modes 6
	539
	540	#define ClearErrors 31
	541	#define ClearFaults 30
	542
	543	#define AllPersist 100 /* internal use only */
	544	#define NoPersist 101
	545
	546	#define ModeMask 0x1f
	547	#define ModeShift 5
fe6729fa NB	548
	549
	550	#ifdef __TINYC__
	551	#undef minor
	552	#undef major
	553	#undef makedev
	554	#define minor(x) ((x)&0xff)
	555	#define major(x) (((x)>>8)&0xff)
	556	#define makedev(M,m) (((M)<<8) \| (m))
	557	#endif
	558
e86c9dd6 NB	559	/* for raid5 */
	560	#define ALGORITHM_LEFT_ASYMMETRIC 0
	561	#define ALGORITHM_RIGHT_ASYMMETRIC 1
	562	#define ALGORITHM_LEFT_SYMMETRIC 2
	563	#define ALGORITHM_RIGHT_SYMMETRIC 3