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 #ifndef __dietlibc__
  33 extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
  34 #endif
  35
  36 #include        <sys/types.h>
  37 #include        <sys/stat.h>
  38 #include        <stdlib.h>
  39 #include        <time.h>
  40 #include        <getopt.h>
  41 #include        <fcntl.h>
  42 #include        <stdio.h>
  43 #include        <errno.h>
  44 #include        <string.h>
  45 #ifdef __dietlibc__NONO
  46 int strncmp(const char *s1, const char *s2, size_t n) __THROW __pure__;
  47 char *strncpy(char *dest, const char *src, size_t n) __THROW;
  48 #include    <strings.h>
  49 #endif
  50
  51
  52 #include        <linux/kdev_t.h>
  53 /*#include      <linux/fs.h> */
  54 #include        <sys/mount.h>
  55 #include        <asm/types.h>
  56 #include        <sys/ioctl.h>
  57 #define MD_MAJOR 9
  58
  59 #ifndef BLKGETSIZE64
  60 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
  61 #endif
  62
  63
  64 #include        "md_u.h"
  65 #include        "md_p.h"
  66
  67 #define Name "mdadm"
  68
  69 enum mode {
  70         ASSEMBLE=1,
  71         BUILD,
  72         CREATE,
  73         MANAGE,
  74         MISC,
  75         MONITOR,
  76 };
  77
  78 extern char short_options[];
  79 extern struct option long_options[];
  80 extern char Version[], Usage[], Help[], OptionHelp[],
  81         Help_create[], Help_build[], Help_assemble[],
  82         Help_manage[], Help_misc[], Help_monitor[], Help_config[];
  83
  84 /* structures read from config file */
  85 /* List of mddevice names and identifiers
  86  * Identifiers can be:
  87  *    uuid=128-hex-uuid
  88  *    super-minor=decimal-minor-number-from-superblock
  89  *    devices=comma,separated,list,of,device,names,with,wildcards
  90  *
  91  * If multiple fields are present, the intersection of all matching
  92  * devices is considered
  93  */
  94 #define UnSet (0xfffe)
  95 typedef struct mddev_ident_s {
  96         char *devname;
  97
  98         int uuid_set;
  99         __u32 uuid[4];
 100
 101         unsigned int super_minor;
 102
 103         char *devices;          /* comma separated list of device
 104                                  * names with wild cards
 105                                  */
 106         int level;
 107         unsigned int raid_disks;
 108         unsigned int spare_disks;
 109         char *spare_group;
 110         struct mddev_ident_s *next;
 111 } *mddev_ident_t;
 112
 113 /* List of device names - wildcards expanded */
 114 typedef struct mddev_dev_s {
 115         char *devname;
 116         char disposition;       /* 'a' for add, 'r' for remove, 'f' for fail.
 117                                  * Not set for names read from .config
 118                                  */
 119         struct mddev_dev_s *next;
 120 } *mddev_dev_t;
 121
 122 typedef struct mapping {
 123         char *name;
 124         int num;
 125 } mapping_t;
 126
 127
 128 struct mdstat_ent {
 129         char            *dev;
 130         int             devnum;
 131         int             active;
 132         char            *level;
 133         char            *pattern; /* U or up, _ for down */
 134         int             percent; /* -1 if no resync */
 135         struct mdstat_ent *next;
 136 };
 137
 138 extern struct mdstat_ent *mdstat_read(void);
 139 extern void free_mdstat(struct mdstat_ent *ms);
 140
 141 #ifndef Sendmail
 142 #define Sendmail "/usr/lib/sendmail -t"
 143 #endif
 144
 145 extern char *map_num(mapping_t *map, int num);
 146 extern int map_name(mapping_t *map, char *name);
 147 extern mapping_t r5layout[], pers[], modes[];
 148
 149 extern char *map_dev(int major, int minor);
 150
 151
 152 extern int Manage_ro(char *devname, int fd, int readonly);
 153 extern int Manage_runstop(char *devname, int fd, int runstop);
 154 extern int Manage_subdevs(char *devname, int fd,
 155                           mddev_dev_t devlist);
 156
 157
 158 extern int Assemble(char *mddev, int mdfd,
 159                     mddev_ident_t ident,
 160                     char *conffile,
 161                     mddev_dev_t devlist,
 162                     int readonly, int runstop,
 163                     char *update,
 164                     int verbose, int force);
 165
 166 extern int Build(char *mddev, int mdfd, int chunk, int level,
 167                  int raiddisks,
 168                  mddev_dev_t devlist);
 169
 170
 171 extern int Create(char *mddev, int mdfd,
 172                   int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks,
 173                   int subdevs, mddev_dev_t devlist,
 174                   int runstop, int verbose, int force);
 175
 176 extern int Detail(char *dev, int brief, int test);
 177 extern int Query(char *dev);
 178 extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust);
 179 extern int Monitor(mddev_dev_t devlist,
 180                    char *mailaddr, char *alert_cmd,
 181                    int period, int daemonise, int scan, int oneshot,
 182                    char *config, int test);
 183
 184 extern int Kill(char *dev, int force);
 185
 186 extern int md_get_version(int fd);
 187 extern int get_linux_version(void);
 188 extern int parse_uuid(char *str, int uuid[4]);
 189 extern int check_ext2(int fd, char *name);
 190 extern int check_reiser(int fd, char *name);
 191 extern int check_raid(int fd, char *name);
 192
 193 extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
 194 extern mddev_dev_t conf_get_devs(char *conffile);
 195 extern char *conf_get_mailaddr(char *conffile);
 196 extern char *conf_get_program(char *conffile);
 197 extern char *conf_line(FILE *file);
 198 extern char *conf_word(FILE *file, int allow_key);
 199 extern void free_line(char *line);
 200 extern int match_oneof(char *devices, char *devname);
 201 extern int load_super(int fd, mdp_super_t *super);
 202 extern void uuid_from_super(int uuid[4], mdp_super_t *super);
 203 extern int same_uuid(int a[4], int b[4]);
 204 extern int compare_super(mdp_super_t *first, mdp_super_t *second);
 205 extern unsigned long calc_sb_csum(mdp_super_t *super);
 206 extern int store_super(int fd, mdp_super_t *super);
 207 extern int enough(int level, int raid_disks, int avail_disks);
 208 extern int ask(char *mesg);
 209
 210
 211 extern char *human_size(long long bytes);
 212 char *human_size_brief(long long bytes);
 213
 214 extern void put_md_name(char *name);
 215 extern char *get_md_name(int dev);
 216
 217 extern char DefaultConfFile[];