[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
# ifdef __NO_STAT64
# 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_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 NB	34	#else
	35	# ifdef __NO_STAT64
	36	# define lseek64 lseek
	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[];
c06487ce	158	extern char short_bitmap_auto_options[];
64c4757e	159	extern struct option long_options[];
56eedc1a	160	extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5	161	Help_create[], Help_build[], Help_assemble[], Help_grow[],
8382f19b	162	Help_incr[],
e0d19036	163	Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e	164
997aed5d NB	165	/* for option that don't have short equivilents, we assign arbitrary
	166	* small numbers. '1' means an undecorated option, so we start at '2'.
	167	*/
	168	enum special_options {
	169	AssumeClean = 2,
	170	BitmapChunk,
	171	WriteBehind,
	172	ReAdd,
	173	NoDegraded,
	174	Sparc22,
	175	BackupFile,
	176	HomeHost,
589395d6	177	AutoHomeHost,
38098016	178	Symlinks,
1f48664b	179	AutoDetect,
997aed5d NB	180	};
997aed5d NB	181
64c4757e	182	/* structures read from config file */
52826846 NB	183	/* List of mddevice names and identifiers
	184	* Identifiers can be:
	185	* uuid=128-hex-uuid
	186	* super-minor=decimal-minor-number-from-superblock
	187	* devices=comma,separated,list,of,device,names,with,wildcards
	188	*
	189	* If multiple fields are present, the intersection of all matching
	190	* devices is considered
	191	*/
98c6faba	192	#define UnSet (0xfffe)
52826846	193	typedef struct mddev_ident_s {
dd0781e5	194	char *devname;
52826846	195
dd0781e5	196	int uuid_set;
3fa06e9d	197	int uuid[4];
947fd4dd	198	char name[33];
52826846	199
98c6faba	200	unsigned int super_minor;
52826846	201
dd0781e5	202	char devices; / comma separated list of device
52826846 NB	203	* names with wild cards
52826846 NB	204	*/
dd0781e5	205	int level;
98c6faba NB	206	unsigned int raid_disks;
98c6faba NB	207	unsigned int spare_disks;
82d9eba6	208	struct supertype *st;
dd0781e5 NB	209	int autof; /* 1 for normal, 2 for partitioned */
dd0781e5 NB	210	char *spare_group;
7ef02d01	211	char *bitmap_file;
c82f047c	212	int bitmap_fd;
dd0781e5	213
52826846 NB	214	struct mddev_ident_s *next;
52826846 NB	215	} *mddev_ident_t;
64c4757e NB	216
	217	/* List of device names - wildcards expanded */
	218	typedef struct mddev_dev_s {
	219	char *devname;
cd29a5c8 NB	220	char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
	221	* Not set for names read from .config
	222	*/
dfd4d8ee	223	char writemostly;
fe80f49b	224	char re_add;
811e6cbe	225	char used; /* set when used */
64c4757e NB	226	struct mddev_dev_s *next;
	227	} *mddev_dev_t;
	228
682c7051 NB	229	typedef struct mapping {
	230	char *name;
	231	int num;
	232	} mapping_t;
	233
e0d19036 NB	234
	235	struct mdstat_ent {
	236	char *dev;
	237	int devnum;
	238	int active;
	239	char *level;
	240	char pattern; / U or up, _ for down */
	241	int percent; /* -1 if no resync */
e5329c37	242	int resync; /* 1 if resync, 0 if recovery */
e0d19036 NB	243	struct mdstat_ent *next;
	244	};
	245
22a88995	246	extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036	247	extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5	248	extern void mdstat_wait(int seconds);
8382f19b NB	249	extern int mddev_busy(int devnum);
	250
	251	struct map_ent {
	252	struct map_ent *next;
	253	int devnum;
	254	int major,minor;
	255	int uuid[4];
	256	char *path;
	257	};
	258	extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
	259	int uuid[4], char *path);
	260	extern struct map_ent map_by_uuid(struct map_ent *map, int uuid[4]);
	261	extern void map_read(struct map_ent **melp);
	262	extern int map_write(struct map_ent *mel);
	263	extern void map_delete(struct map_ent **mapp, int devnum);
	264	extern void map_free(struct map_ent *map);
	265	extern void map_add(struct map_ent **melp,
	266	int devnum, int major, int minor, int uuid[4], char *path);
e0d19036	267
e86c9dd6 NB	268	/* Data structure for holding info read from sysfs */
	269	struct sysdev {
	270	char name[20];
	271	int role;
	272	int major, minor;
	273	unsigned long long offset, size;
	274	int state;
	275	int errors;
	276	struct sysdev *next;
	277	};
	278	struct sysarray {
	279	char name[20];
	280	struct sysdev *devs;
	281	int chunk;
	282	unsigned long long component_size;
	283	int layout;
	284	int level;
	285	int spares;
758d3a8e	286	int cache_size;
37dfc3d6	287	int mismatch_cnt;
8382f19b	288	int major_version, minor_version;
e86c9dd6 NB	289	};
	290	/* various details can be requested */
	291	#define GET_LEVEL 1
	292	#define GET_LAYOUT 2
	293	#define GET_COMPONENT 4
	294	#define GET_CHUNK 8
758d3a8e	295	#define GET_CACHE 16
37dfc3d6	296	#define GET_MISMATCH 32
8382f19b	297	#define GET_VERSION 64
e86c9dd6 NB	298
	299	#define GET_DEVS 1024 /* gets role, major, minor */
	300	#define GET_OFFSET 2048
	301	#define GET_SIZE 4096
	302	#define GET_STATE 8192
	303	#define GET_ERROR 16384
	304
	305	/* If fd >= 0, get the array it is open on,
	306	* else use devnum. >=0 -> major9. <0.....
	307	*/
8382f19b	308	extern void sysfs_free(struct sysarray *sra);
e86c9dd6 NB	309	extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
	310	extern int sysfs_set_str(struct sysarray sra, struct sysdev dev,
	311	char name, char val);
	312	extern int sysfs_set_num(struct sysarray sra, struct sysdev dev,
	313	char *name, unsigned long long val);
	314	extern int sysfs_get_ll(struct sysarray sra, struct sysdev dev,
	315	char name, unsigned long long val);
	316
	317
	318	extern int save_stripes(int source, unsigned long long offsets,
	319	int raid_disks, int chunk_size, int level, int layout,
	320	int nwrites, int *dest,
	321	unsigned long long start, unsigned long long length);
353632d9 NB	322	extern int restore_stripes(int dest, unsigned long long offsets,
	323	int raid_disks, int chunk_size, int level, int layout,
	324	int source, unsigned long long read_offset,
	325	unsigned long long start, unsigned long long length);
e86c9dd6	326
52826846 NB	327	#ifndef Sendmail
	328	#define Sendmail "/usr/lib/sendmail -t"
	329	#endif
	330
773135f5 NB	331	#define SYSLOG_FACILITY LOG_DAEMON
773135f5 NB	332
682c7051 NB	333	extern char map_num(mapping_t map, int num);
682c7051 NB	334	extern int map_name(mapping_t map, char name);
b5e64645	335	extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051	336
16c6fa80	337	extern char *map_dev(int major, int minor, int create);
64c4757e NB	338
64c4757e NB	339
f9ce90ba	340	extern struct superswitch {
a1cbd7d0	341	void (examine_super)(void sbv, char *homehost);
f9ce90ba	342	void (brief_examine_super)(void sbv);
b6750aa8	343	void (detail_super)(void sbv, char *homehost);
54bad364	344	void (export_super)(void sbv);
f9ce90ba NB	345	void (brief_detail_super)(void sbv);
f9ce90ba NB	346	void (uuid_from_super)(int uuid[4], void sbv);
31317663	347	void (getinfo_super)(struct mdinfo info, void *sbv);
83b6208e	348	int (match_home)(void sbv, char *homehost);
e5eac01f NB	349	int (update_super)(struct mdinfo info, void sbv, char update,
	350	char *devname, int verbose,
	351	int uuid_set, char *homehost);
3d3dd91e	352	int (init_super)(struct supertype st, void *sbp, mdu_array_info_t info, unsigned long long size, char name, char homehost, int *uuid);
f9ce90ba	353	void (add_to_super)(void sbv, mdu_disk_info_t *dinfo);
96395475	354	int (store_super)(struct supertype st, int fd, void *sbv);
1bf4e2d9	355	int (write_init_super)(struct supertype st, void sbv, mdu_disk_info_t dinfo, char *devname);
f9ce90ba	356	int (compare_super)(void firstp, void secondv);
82d9eba6 NB	357	int (load_super)(struct supertype st, int fd, void *sbp, char devname);
82d9eba6 NB	358	struct supertype * (match_metadata_desc)(char arg);
1bf4e2d9	359	__u64 (avail_size)(struct supertype st, __u64 size);
199171a2 NB	360	int (add_internal_bitmap)(struct supertype st, void sbv, int chunkp,
199171a2 NB	361	int delay, int write_behind,
f9c25f1d	362	unsigned long long size, int may_change, int major);
f6d75de8	363	void (locate_bitmap)(struct supertype st, int fd, void *sbv);
f5e166fe	364	int (write_bitmap)(struct supertype st, int fd, void *sbv);
82d9eba6	365	int major;
f277ce36	366	int swapuuid; /* true if uuid is bigending rather than hostendian */
82d9eba6 NB	367	} super0, super1, *superlist[];
	368
	369	struct supertype {
	370	struct superswitch *ss;
	371	int minor_version;
ea329559	372	int max_devs;
82d9eba6	373	};
f9ce90ba	374
82d9eba6 NB	375	extern struct supertype *super_by_version(int vers, int minor);
82d9eba6 NB	376	extern struct supertype *guess_super(int fd);
beae1dfe	377	extern int get_dev_size(int fd, char dname, unsigned long long sizep);
8382f19b NB	378	extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
8382f19b NB	379	mdu_disk_info_t *disk);
f9ce90ba	380
838acbc2 NB	381	#if __GNUC__ < 3
	382	struct stat64;
	383	#endif
	384
45e878bb NB	385	#define HAVE_NFTW we assume
	386	#define HAVE_FTW
	387
173fc515	388	#ifdef UCLIBC
45e878bb NB	389	# include <features.h>
	390	# ifndef __UCLIBC_HAS_FTW__
	391	# undef HAVE_FTW
	392	# undef HAVE_NFTW
	393	# endif
	394	#endif
	395
	396	#ifdef __dietlibc__
	397	# undef HAVE_NFTW
	398	#endif
	399
	400	#ifndef HAVE_NFTW
173fc515	401	# define FTW_PHYS 1
45e878bb NB	402	# ifndef HAVE_FTW
45e878bb NB	403	struct FTW {};
173fc515 NB	404	# endif
	405	#endif
	406
45e878bb NB	407	#ifdef HAVE_FTW
	408	# include <ftw.h>
	409	#endif
	410
173fc515 NB	411	extern int add_dev(const char name, const struct stat stb, int flag, struct FTW *s);
173fc515 NB	412
f9ce90ba	413
64c4757e	414	extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf	415	extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5	416	extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645	417	extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e	418	extern int Manage_subdevs(char *devname, int fd,
dab6685f	419	mddev_dev_t devlist, int verbose);
1f48664b	420	extern int autodetect(void);
e5329c37	421	extern int Grow_Add_device(char devname, int fd, char newdev);
8fac0577	422	extern int Grow_addbitmap(char devname, int fd, char file, int chunk, int delay, int write_behind, int force);
06b0d786	423	extern int Grow_reshape(char devname, int fd, int quiet, char backup_file,
e86c9dd6 NB	424	long long size,
e86c9dd6 NB	425	int level, int layout, int chunksize, int raid_disks);
06b0d786 NB	426	extern int Grow_restart(struct supertype st, struct mdinfo info,
06b0d786 NB	427	int fdlist, int cnt, char backup_file);
64c4757e NB	428
64c4757e NB	429
82d9eba6	430	extern int Assemble(struct supertype st, char mddev, int mdfd,
52826846	431	mddev_ident_t ident,
06b0d786	432	mddev_dev_t devlist, char *backup_file,
64c4757e	433	int readonly, int runstop,
e5eac01f	434	char update, char homehost,
64c4757e NB	435	int verbose, int force);
64c4757e NB	436
b5e64645	437	extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e	438	int raiddisks,
c82f047c	439	mddev_dev_t devlist, int assume_clean,
dab6685f	440	char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e NB	441
64c4757e NB	442
82d9eba6	443	extern int Create(struct supertype st, char mddev, int mdfd,
5dd497ee	444	int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
3d3dd91e	445	char name, char homehost, int *uuid,
cd29a5c8	446	int subdevs, mddev_dev_t devlist,
47d79ef8	447	int runstop, int verbose, int force, int assume_clean,
dfd4d8ee	448	char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e	449
54bad364	450	extern int Detail(char dev, int brief, int export, int test, char homehost);
e0d19036	451	extern int Query(char *dev);
82d9eba6	452	extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust,
a1cbd7d0	453	struct supertype forcest, char homehost);
cd29a5c8	454	extern int Monitor(mddev_dev_t devlist,
e0d19036	455	char mailaddr, char alert_cmd,
aa88f531	456	int period, int daemonise, int scan, int oneshot,
8aec876d	457	int dosyslog, int test, char *pidfile);
64c4757e	458
6409687b	459	extern int Kill(char *dev, int force, int quiet);
b90c0e9a	460	extern int Wait(char *dev);
9a9dab36	461
8382f19b NB	462	extern int Incremental(char *devname, int verbose, int runstop,
	463	struct supertype st, char homehost, int autof);
	464	extern void RebuildMap(void);
	465	extern int IncrementalScan(int verbose);
	466
c82f047c NB	467	extern int CreateBitmap(char *filename, int force, char uuid[16],
c82f047c NB	468	unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee	469	unsigned long write_behind,
dcec9ee5 NB	470	unsigned long long array_size,
dcec9ee5 NB	471	int major);
55935d51	472	extern int ExamineBitmap(char filename, int brief, struct supertype st);
bf4fb153	473	extern int bitmap_update_uuid(int fd, int *uuid, int swap);
c82f047c	474
64c4757e	475	extern int md_get_version(int fd);
e0d19036	476	extern int get_linux_version(void);
64c4757e	477	extern int parse_uuid(char *str, int uuid[4]);
682c7051 NB	478	extern int check_ext2(int fd, char *name);
	479	extern int check_reiser(int fd, char *name);
	480	extern int check_raid(int fd, char *name);
64c4757e	481
dd0781e5	482	extern int get_mdp_major(void);
8b0dabea	483	extern int dev_open(char *dev, int flags);
8d80900b	484	extern int is_standard(char dev, int nump);
dd0781e5	485
f1ae21c4	486	extern int parse_auto(char str, char msg, int config);
8aec876d NB	487	extern mddev_ident_t conf_get_ident(char *dev);
8aec876d NB	488	extern mddev_dev_t conf_get_devs(void);
8382f19b	489	extern int conf_test_dev(char *devname);
8aec876d NB	490	extern struct createinfo *conf_get_create_info(void);
	491	extern void set_conffile(char *file);
	492	extern char *conf_get_mailaddr(void);
	493	extern char *conf_get_mailfrom(void);
	494	extern char *conf_get_program(void);
	495	extern char *conf_get_homehost(void);
e0d19036	496	extern char conf_line(FILE file);
98c6faba	497	extern char conf_word(FILE file, int allow_key);
e0d19036 NB	498	extern void free_line(char *line);
e0d19036 NB	499	extern int match_oneof(char devices, char devname);
e0d19036	500	extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36	501	extern int same_uuid(int a[4], int b[4], int swapuuid);
350f29f9	502	extern void copy_uuid(void *a, int b[4], int swapuuid);
4b1ac34b NB	503	/* extern int compare_super(mdp_super_t first, mdp_super_t second);*/
4b1ac34b NB	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