mdadm.h

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
   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
  30 #define __USE_LARGEFILE64
  31 #include        <unistd.h>
  32 extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
  33
  34 #include        <sys/types.h>
  35 #include        <sys/stat.h>
  36 #include        <stdlib.h>
  37 #include        <time.h>
  38 #include        <getopt.h>
  39 #include        <fcntl.h>
  40 #include        <stdio.h>
  41 #include        <errno.h>
  42 #include        <string.h>
  43
  44 #include        <linux/kdev_t.h>
  45 /*#include      <linux/fs.h> */
  46 #include        <sys/mount.h>
  47 #include        <asm/types.h>
  48 #include        <sys/ioctl.h>
  49 #define MD_MAJOR 9
  50
  51 #ifndef BLKGETSIZE64
  52 #define BLKGETSIZE64 _IOR(0x12,114,sizeof(__u64)) /* return device size in bytes (u64 *arg) */
  53 #endif
  54
  55
  56 #include        "md_u.h"
  57 #include        "md_p.h"
  58
  59 #define Name "mdadm"
  60
  61 enum mode {
  62         ASSEMBLE=1,
  63         BUILD,
  64         CREATE,
  65         MANAGE,
  66         MISC,
  67         MONITOR,
  68 };
  69
  70 extern char short_options[];
  71 extern struct option long_options[];
  72 extern char Version[], Usage[], Help[], OptionHelp[],
  73         Help_create[], Help_build[], Help_assemble[],
  74         Help_manage[], Help_misc[], Help_monitor[], Help_config[];
  75
  76 /* structures read from config file */
  77 /* List of mddevice names and identifiers
  78  * Identifiers can be:
  79  *    uuid=128-hex-uuid
  80  *    super-minor=decimal-minor-number-from-superblock
  81  *    devices=comma,separated,list,of,device,names,with,wildcards
  82  *
  83  * If multiple fields are present, the intersection of all matching
  84  * devices is considered
  85  */
  86 typedef struct mddev_ident_s {
  87         char *devname;
  88
  89         int uuid_set;
  90         __u32 uuid[4];
  91
  92         int super_minor;        /* -1 if not set */
  93
  94         char *devices;          /* comma separated list of device
  95                                  * names with wild cards
  96                                  */
  97         int level;              /* -10 if not set */
  98         int raid_disks;         /* -1 if not set */
  99         char *spare_group;
 100         struct mddev_ident_s *next;
 101 } *mddev_ident_t;
 102
 103 /* List of device names - wildcards expanded */
 104 typedef struct mddev_dev_s {
 105         char *devname;
 106         char disposition;       /* 'a' for add, 'r' for remove, 'f' for fail.
 107                                  * Not set for names read from .config
 108                                  */
 109         struct mddev_dev_s *next;
 110 } *mddev_dev_t;
 111
 112 typedef struct mapping {
 113         char *name;
 114         int num;
 115 } mapping_t;
 116
 117
 118 struct mdstat_ent {
 119         char            *dev;
 120         int             devnum;
 121         int             active;
 122         char            *level;
 123         char            *pattern; /* U or up, _ for down */
 124         int             percent; /* -1 if no resync */
 125         struct mdstat_ent *next;
 126 };
 127
 128 extern struct mdstat_ent *mdstat_read(void);
 129 extern void free_mdstat(struct mdstat_ent *ms);
 130
 131 #ifndef Sendmail
 132 #define Sendmail "/usr/lib/sendmail -t"
 133 #endif
 134
 135 extern char *map_num(mapping_t *map, int num);
 136 extern int map_name(mapping_t *map, char *name);
 137 extern mapping_t r5layout[], pers[], modes[];
 138
 139 extern char *map_dev(int major, int minor);
 140
 141
 142 extern int Manage_ro(char *devname, int fd, int readonly);
 143 extern int Manage_runstop(char *devname, int fd, int runstop);
 144 extern int Manage_subdevs(char *devname, int fd,
 145                           mddev_dev_t devlist);
 146
 147
 148 extern int Assemble(char *mddev, int mdfd,
 149                     mddev_ident_t ident,
 150                     char *conffile,
 151                     mddev_dev_t devlist,
 152                     int readonly, int runstop,
 153                     char *update,
 154                     int verbose, int force);
 155
 156 extern int Build(char *mddev, int mdfd, int chunk, int level,
 157                  int raiddisks,
 158                  mddev_dev_t devlist);
 159
 160
 161 extern int Create(char *mddev, int mdfd,
 162                   int chunk, int level, int layout, int size, int raiddisks, int sparedisks,
 163                   int subdevs, mddev_dev_t devlist,
 164                   int runstop, int verbose, int force);
 165
 166 extern int Detail(char *dev, int brief);
 167 extern int Query(char *dev);
 168 extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust);
 169 extern int Monitor(mddev_dev_t devlist,
 170                    char *mailaddr, char *alert_cmd,
 171                    int period, int daemonise, int scan,
 172                    char *config);
 173
 174 extern int Kill(char *dev, int force);
 175
 176 extern int md_get_version(int fd);
 177 extern int get_linux_version(void);
 178 extern int parse_uuid(char *str, int uuid[4]);
 179 extern int check_ext2(int fd, char *name);
 180 extern int check_reiser(int fd, char *name);
 181 extern int check_raid(int fd, char *name);
 182
 183 extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
 184 extern mddev_dev_t conf_get_devs(char *conffile);
 185 extern char *conf_get_mailaddr(char *conffile);
 186 extern char *conf_get_program(char *conffile);
 187 extern char *conf_line(FILE *file);
 188 extern void free_line(char *line);
 189 extern int match_oneof(char *devices, char *devname);
 190 extern int load_super(int fd, mdp_super_t *super);
 191 extern void uuid_from_super(int uuid[4], mdp_super_t *super);
 192 extern int same_uuid(int a[4], int b[4]);
 193 extern int compare_super(mdp_super_t *first, mdp_super_t *second);
 194 extern int calc_sb_csum(mdp_super_t *super);
 195 extern int store_super(int fd, mdp_super_t *super);
 196 extern int enough(int level, int raid_disks, int avail_disks);
 197 extern int ask(char *mesg);
 198
 199
 200 extern char *human_size(long long bytes);
 201 char *human_size_brief(long long bytes);
 202
 203 extern void put_md_name(char *name);
 204 extern char *get_md_name(int dev);
 205
 206 extern char DefaultConfFile[];