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* mdadm - manage Linux "md" devices aka RAID arrays.
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* Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* Email: <neilb@cse.unsw.edu.au>
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* School of Computer Science and Engineering
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* The University of New South Wales
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#define _FILE_OFFSET_BITS 64
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#if !defined(__dietlibc__) && !defined(__KLIBC__)
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extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
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# if defined(__NO_STAT64) || __WORDSIZE != 32
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# define lseek64 lseek
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#include <sys/types.h>
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/* dietlibc has deprecated random and srandom!! */
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#include <linux/kdev_t.h>
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/*#include <linux/fs.h> */
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#include <sys/mount.h>
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#include <asm/types.h>
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#include <sys/ioctl.h>
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#define MdpMinorShift 6
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#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
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#define DEFAULT_BITMAP_CHUNK 4096
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#define DEFAULT_BITMAP_DELAY 5
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#define DEFAULT_MAX_WRITE_BEHIND 256
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/* Redhat don't like to #include <asm/byteorder.h>, and
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* some time include <linux/byteorder/xxx_endian.h> isn't enough,
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* and there is no standard conversion function so... */
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/* And dietlibc doesn't think byteswap is ok, so.. */
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/* #include <byteswap.h> */
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#define bswap_16(x) (((x) & 0x00ffU) << 8 | \
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#define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
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((x) & 0xff000000U) >> 24 | \
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((x) & 0x0000ff00U) << 8 | \
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((x) & 0x00ff0000U) >> 8)
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#define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
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((x) & 0xff00000000000000ULL) >> 56 | \
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((x) & 0x000000000000ff00ULL) << 40 | \
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((x) & 0x00ff000000000000ULL) >> 40 | \
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((x) & 0x0000000000ff0000ULL) << 24 | \
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((x) & 0x0000ff0000000000ULL) >> 24 | \
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((x) & 0x00000000ff000000ULL) << 8 | \
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((x) & 0x000000ff00000000ULL) >> 8)
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#if !defined(__KLIBC__)
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define __cpu_to_le16(_x) (_x)
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#define __cpu_to_le32(_x) (_x)
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#define __cpu_to_le64(_x) (_x)
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#define __le16_to_cpu(_x) (_x)
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#define __le32_to_cpu(_x) (_x)
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#define __le64_to_cpu(_x) (_x)
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#elif BYTE_ORDER == BIG_ENDIAN
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#define __cpu_to_le16(_x) bswap_16(_x)
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#define __cpu_to_le32(_x) bswap_32(_x)
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#define __cpu_to_le64(_x) bswap_64(_x)
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#define __le16_to_cpu(_x) bswap_16(_x)
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#define __le32_to_cpu(_x) bswap_32(_x)
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#define __le64_to_cpu(_x) bswap_64(_x)
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# error "unknown endianness."
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#endif /* __KLIBC__ */
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/* general information that might be extracted from a superblock */
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mdu_array_info_t array;
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mdu_disk_info_t disk;
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unsigned long long data_offset;
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unsigned long long component_size;
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unsigned long long reshape_progress;
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int new_level, delta_disks, new_layout, new_chunk;
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int cache_size; /* size of raid456 stripe cache*/
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char text_version[50];
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struct supertype *supertype;
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extern char short_options[];
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extern char short_bitmap_options[];
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extern char short_bitmap_auto_options[];
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extern struct option long_options[];
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extern char Version[], Usage[], Help[], OptionHelp[],
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Help_create[], Help_build[], Help_assemble[], Help_grow[],
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Help_manage[], Help_misc[], Help_monitor[], Help_config[];
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/* for option that don't have short equivilents, we assign arbitrary
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* small numbers. '1' means an undecorated option, so we start at '2'.
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enum special_options {
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/* structures read from config file */
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/* List of mddevice names and identifiers
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* Identifiers can be:
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* super-minor=decimal-minor-number-from-superblock
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* devices=comma,separated,list,of,device,names,with,wildcards
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* If multiple fields are present, the intersection of all matching
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* devices is considered
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#define UnSet (0xfffe)
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typedef struct mddev_ident_s {
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unsigned int super_minor;
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char *devices; /* comma separated list of device
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* names with wild cards
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unsigned int raid_disks;
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unsigned int spare_disks;
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struct supertype *st;
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int autof; /* 1 for normal, 2 for partitioned */
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struct mddev_ident_s *next;
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/* List of device names - wildcards expanded */
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typedef struct mddev_dev_s {
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char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
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* Not set for names read from .config
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char used; /* set when used */
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struct mddev_dev_s *next;
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typedef struct mapping {
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char *pattern; /* U or up, _ for down */
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int percent; /* -1 if no resync */
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int resync; /* 1 if resync, 0 if recovery */
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struct mdstat_ent *next;
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extern struct mdstat_ent *mdstat_read(int hold, int start);
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extern void free_mdstat(struct mdstat_ent *ms);
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extern void mdstat_wait(int seconds);
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extern int mddev_busy(int devnum);
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struct map_ent *next;
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extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
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int uuid[4], char *path);
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extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
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extern void map_read(struct map_ent **melp);
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extern int map_write(struct map_ent *mel);
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extern void map_delete(struct map_ent **mapp, int devnum);
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extern void map_free(struct map_ent *map);
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extern void map_add(struct map_ent **melp,
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int devnum, int major, int minor, int uuid[4], char *path);
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extern int map_lock(struct map_ent **melp);
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extern void map_unlock(struct map_ent **melp);
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/* various details can be requested */
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#define GET_COMPONENT 4
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#define GET_MISMATCH 32
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#define GET_VERSION 64
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#define GET_DEVS 1024 /* gets role, major, minor */
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#define GET_OFFSET 2048
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#define GET_SIZE 4096
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#define GET_STATE 8192
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#define GET_ERROR 16384
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/* If fd >= 0, get the array it is open on,
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* else use devnum. >=0 -> major9. <0.....
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extern void sysfs_free(struct mdinfo *sra);
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extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
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extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
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char *name, char *val);
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extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
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char *name, unsigned long long val);
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extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
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char *name, unsigned long long *val);
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extern int save_stripes(int *source, unsigned long long *offsets,
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int raid_disks, int chunk_size, int level, int layout,
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int nwrites, int *dest,
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unsigned long long start, unsigned long long length);
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extern int restore_stripes(int *dest, unsigned long long *offsets,
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int raid_disks, int chunk_size, int level, int layout,
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int source, unsigned long long read_offset,
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unsigned long long start, unsigned long long length);
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#define Sendmail "/usr/lib/sendmail -t"
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#define SYSLOG_FACILITY LOG_DAEMON
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extern char *map_num(mapping_t *map, int num);
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extern int map_name(mapping_t *map, char *name);
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extern mapping_t r5layout[], pers[], modes[], faultylayout[];
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extern char *map_dev(int major, int minor, int create);
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extern struct superswitch {
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void (*examine_super)(struct supertype *st, char *homehost);
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void (*brief_examine_super)(struct supertype *st);
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void (*export_examine_super)(struct supertype *st);
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void (*detail_super)(struct supertype *st, char *homehost);
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void (*brief_detail_super)(struct supertype *st);
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void (*export_detail_super)(struct supertype *st);
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void (*uuid_from_super)(struct supertype *st, int uuid[4]);
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void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
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int (*match_home)(struct supertype *st, char *homehost);
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int (*update_super)(struct supertype *st, struct mdinfo *info,
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char *devname, int verbose,
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int uuid_set, char *homehost);
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int (*init_super)(struct supertype *st, mdu_array_info_t *info,
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unsigned long long size, char *name,
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char *homehost, int *uuid);
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void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo);
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int (*store_super)(struct supertype *st, int fd);
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int (*write_init_super)(struct supertype *st, mdu_disk_info_t *dinfo,
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int (*compare_super)(struct supertype *st, struct supertype *tst);
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int (*load_super)(struct supertype *st, int fd, char *devname);
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struct supertype * (*match_metadata_desc)(char *arg);
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__u64 (*avail_size)(struct supertype *st, __u64 size);
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int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
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int delay, int write_behind,
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unsigned long long size, int may_change, int major);
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void (*locate_bitmap)(struct supertype *st, int fd);
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int (*write_bitmap)(struct supertype *st, int fd);
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void (*free_super)(struct supertype *st);
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int swapuuid; /* true if uuid is bigending rather than hostendian */
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} super0, super1, *superlist[];
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struct superswitch *ss;
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extern struct supertype *super_by_fd(int fd);
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extern struct supertype *guess_super(int fd);
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extern struct supertype *dup_super(struct supertype *st);
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extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
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extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
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mdu_disk_info_t *disk);
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#define HAVE_NFTW we assume
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# include <features.h>
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# ifndef __UCLIBC_HAS_FTW__
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#if defined(__KLIBC__)
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extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
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extern int Manage_ro(char *devname, int fd, int readonly);
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extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
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extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
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extern int Manage_reconfig(char *devname, int fd, int layout);
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extern int Manage_subdevs(char *devname, int fd,
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mddev_dev_t devlist, int verbose);
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extern int autodetect(void);
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extern int Grow_Add_device(char *devname, int fd, char *newdev);
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extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
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extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
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int level, int layout, int chunksize, int raid_disks);
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extern int Grow_restart(struct supertype *st, struct mdinfo *info,
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int *fdlist, int cnt, char *backup_file);
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extern int Assemble(struct supertype *st, char *mddev, int mdfd,
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mddev_dev_t devlist, char *backup_file,
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int readonly, int runstop,
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char *update, char *homehost,
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int verbose, int force);
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extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
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mddev_dev_t devlist, int assume_clean,
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char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
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extern int Create(struct supertype *st, char *mddev, int mdfd,
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int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
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char *name, char *homehost, int *uuid,
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int subdevs, mddev_dev_t devlist,
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int runstop, int verbose, int force, int assume_clean,
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char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
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extern int Detail(char *dev, int brief, int export, int test, char *homehost);
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extern int Query(char *dev);
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extern int Examine(mddev_dev_t devlist, int brief, int export, int scan,
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int SparcAdjust, struct supertype *forcest, char *homehost);
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extern int Monitor(mddev_dev_t devlist,
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char *mailaddr, char *alert_cmd,
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int period, int daemonise, int scan, int oneshot,
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int dosyslog, int test, char *pidfile);
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extern int Kill(char *dev, int force, int quiet);
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extern int Wait(char *dev);
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extern int Incremental(char *devname, int verbose, int runstop,
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struct supertype *st, char *homehost, int autof);
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extern void RebuildMap(void);
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extern int IncrementalScan(int verbose);
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extern int CreateBitmap(char *filename, int force, char uuid[16],
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unsigned long chunksize, unsigned long daemon_sleep,
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unsigned long write_behind,
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unsigned long long array_size,
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extern int ExamineBitmap(char *filename, int brief, struct supertype *st);
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extern int bitmap_update_uuid(int fd, int *uuid, int swap);
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extern unsigned long bitmap_sectors(struct bitmap_super_s *bsb);
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extern int md_get_version(int fd);
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extern int get_linux_version(void);
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extern int parse_uuid(char *str, int uuid[4]);
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extern int check_ext2(int fd, char *name);
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extern int check_reiser(int fd, char *name);
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extern int check_raid(int fd, char *name);
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extern int get_mdp_major(void);
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extern int dev_open(char *dev, int flags);
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extern int is_standard(char *dev, int *nump);
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extern int parse_auto(char *str, char *msg, int config);
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extern mddev_ident_t conf_get_ident(char *dev);
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extern mddev_dev_t conf_get_devs(void);
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extern int conf_test_dev(char *devname);
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extern struct createinfo *conf_get_create_info(void);
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extern void set_conffile(char *file);
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extern char *conf_get_mailaddr(void);
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extern char *conf_get_mailfrom(void);
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extern char *conf_get_program(void);
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extern char *conf_get_homehost(void);
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extern char *conf_line(FILE *file);
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extern char *conf_word(FILE *file, int allow_key);
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extern struct mddev_ident_s *conf_match(struct mdinfo *info, struct supertype *st);
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extern void free_line(char *line);
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extern int match_oneof(char *devices, char *devname);
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extern void uuid_from_super(int uuid[4], mdp_super_t *super);
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extern int same_uuid(int a[4], int b[4], int swapuuid);
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extern void copy_uuid(void *a, int b[4], int swapuuid);
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extern unsigned long calc_csum(void *super, int bytes);
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extern int enough(int level, int raid_disks, int layout, int clean,
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char *avail, int avail_disks);
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extern int ask(char *mesg);
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extern unsigned long long get_component_size(int fd);
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extern void remove_partitions(int fd);
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extern char *human_size(long long bytes);
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char *human_size_brief(long long bytes);
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#define NoMdDev (1<<23)
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extern int find_free_devnum(int use_partitions);
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extern void put_md_name(char *name);
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extern char *get_md_name(int dev);
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extern char DefaultConfFile[];
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extern int create_mddev(char *dev, int autof);
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extern int create_mddev_devnum(char *devname, int devnum, char *name,
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char *chosen_name, int parts);
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#define LEVEL_MULTIPATH (-4)
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#define LEVEL_LINEAR (-1)
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#define LEVEL_FAULTY (-5)
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#define WriteTransient 0
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#define ReadTransient 1
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#define WritePersistent 2
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#define ReadPersistent 3
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#define WriteAll 4 /* doesn't go to device */
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#define ReadFixable 5
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#define ClearErrors 31
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#define ClearFaults 30
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#define AllPersist 100 /* internal use only */
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#define NoPersist 101
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#define ModeMask 0x1f
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#define minor(x) ((x)&0xff)
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#define major(x) (((x)>>8)&0xff)
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#define makedev(M,m) (((M)<<8) | (m))
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#define ALGORITHM_LEFT_ASYMMETRIC 0
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#define ALGORITHM_RIGHT_ASYMMETRIC 1
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#define ALGORITHM_LEFT_SYMMETRIC 2
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#define ALGORITHM_RIGHT_SYMMETRIC 3
added
removed
mdadm.h
