/* * mdadm - manage Linux "md" devices aka RAID arrays. * * Copyright (C) 2001-2002 Neil Brown * * * 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: * Paper: Neil Brown * School of Computer Science and Engineering * The University of New South Wales * Sydney, 2052 * Australia */ #define __USE_LARGEFILE64 #include #ifndef __dietlibc__ extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence)); #endif #include #include #include #include #include #include #include #include #include #ifdef __dietlibc__NONO int strncmp(const char *s1, const char *s2, size_t n) __THROW __pure__; char *strncpy(char *dest, const char *src, size_t n) __THROW; #include #endif #include /*#include */ #include #include #include #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 #include "md_u.h" #include "md_p.h" #include "bitmap.h" /* general information that might be extracted from a superblock */ struct mdinfo { mdu_array_info_t array; mdu_disk_info_t disk; __u64 events; unsigned int uuid[4]; }; #define Name "mdadm" enum mode { ASSEMBLE=1, BUILD, CREATE, MANAGE, MISC, MONITOR, GROW, }; extern char short_options[]; extern struct option long_options[]; extern char Version[], Usage[], Help[], OptionHelp[], Help_create[], Help_build[], Help_assemble[], Help_grow[], Help_manage[], Help_misc[], Help_monitor[], Help_config[]; /* 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; __u32 uuid[4]; 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; 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 */ 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); extern void free_mdstat(struct mdstat_ent *ms); extern void mdstat_wait(int seconds); #ifndef Sendmail #define Sendmail "/usr/lib/sendmail -t" #endif 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); extern struct superswitch { void (*examine_super)(void *sbv); void (*brief_examine_super)(void *sbv); void (*detail_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 (*update_super)(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose); __u64 (*event_super)(void *sbv); int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info); 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)(__u64 size); int (*add_internal_bitmap)(void *sbv, int chunk, int delay, unsigned long long size); void (*locate_bitmap)(struct supertype *st, int fd); int (*write_bitmap)(struct supertype *st, int fd, void *sbv); int major; } 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 Manage_ro(char *devname, int fd, int readonly); extern int Manage_runstop(char *devname, int fd, int runstop); 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); 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); extern int Assemble(struct supertype *st, char *mddev, int mdfd, mddev_ident_t ident, char *conffile, mddev_dev_t devlist, int readonly, int runstop, char *update, 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 delay); extern int Create(struct supertype *st, char *mddev, int mdfd, int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks, int subdevs, mddev_dev_t devlist, int runstop, int verbose, int force, char *bitmap_file, int bitmap_chunk, int delay); extern int Detail(char *dev, int brief, int test); extern int Query(char *dev); extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust, struct supertype *forcest); extern int Monitor(mddev_dev_t devlist, char *mailaddr, char *alert_cmd, int period, int daemonise, int scan, int oneshot, char *config, int test, char *pidfile); extern int Kill(char *dev, int force); extern int CreateBitmap(char *filename, int force, char uuid[16], unsigned long chunksize, unsigned long daemon_sleep, unsigned long long array_size); extern int ExamineBitmap(char *filename, int brief, struct supertype *st); 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 is_standard(char *dev, int *nump); extern mddev_ident_t conf_get_ident(char *conffile, char *dev); extern mddev_dev_t conf_get_devs(char *conffile); extern char *conf_get_mailaddr(char *conffile); extern char *conf_get_program(char *conffile); 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]); /* 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 avail_disks); extern int ask(char *mesg); extern char *human_size(long long bytes); char *human_size_brief(long long bytes); extern void put_md_name(char *name); extern char *get_md_name(int dev); extern char DefaultConfFile[]; extern int open_mddev(char *dev, int autof); #define LEVEL_MULTIPATH (-4) #define LEVEL_LINEAR (-1) #define LEVEL_FAULTY (-5) /* faulty stuff */ #define WriteTransient 0 #define ReadTransient 1 #define WritePersistent 2 #define ReadPersistent 3 #define WriteAll 4 /* doesn't go to device */ #define ReadFixable 5 #define Modes 6 #define ClearErrors 31 #define ClearFaults 30 #define AllPersist 100 /* internal use only */ #define NoPersist 101 #define ModeMask 0x1f #define ModeShift 5