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 #define MdpMinorShift 6
  59
  60 #ifndef BLKGETSIZE64
  61 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
  62 #endif
  63
  64
  65 #include        "md_u.h"
  66 #include        "md_p.h"
  67
  68 #define Name "mdadm"
  69
  70 enum mode {
  71         ASSEMBLE=1,
  72         BUILD,
  73         CREATE,
  74         MANAGE,
  75         MISC,
  76         MONITOR,
  77         GROW,
  78 };
  79
  80 extern char short_options[];
  81 extern struct option long_options[];
  82 extern char Version[], Usage[], Help[], OptionHelp[],
  83         Help_create[], Help_build[], Help_assemble[], Help_grow[],
  84         Help_manage[], Help_misc[], Help_monitor[], Help_config[];
  85
  86 /* structures read from config file */
  87 /* List of mddevice names and identifiers
  88  * Identifiers can be:
  89  *    uuid=128-hex-uuid
  90  *    super-minor=decimal-minor-number-from-superblock
  91  *    devices=comma,separated,list,of,device,names,with,wildcards
  92  *
  93  * If multiple fields are present, the intersection of all matching
  94  * devices is considered
  95  */
  96 #define UnSet (0xfffe)
  97 typedef struct mddev_ident_s {
  98         char    *devname;
  99
 100         int     uuid_set;
 101         __u32   uuid[4];
 102
 103         unsigned int super_minor;
 104
 105         char    *devices;       /* comma separated list of device
 106                                  * names with wild cards
 107                                  */
 108         int     level;
 109         unsigned int raid_disks;
 110         unsigned int spare_disks;
 111         int     autof;          /* 1 for normal, 2 for partitioned */
 112         char    *spare_group;
 113
 114         struct mddev_ident_s *next;
 115 } *mddev_ident_t;
 116
 117 /* List of device names - wildcards expanded */
 118 typedef struct mddev_dev_s {
 119         char *devname;
 120         char disposition;       /* 'a' for add, 'r' for remove, 'f' for fail.
 121                                  * Not set for names read from .config
 122                                  */
 123         struct mddev_dev_s *next;
 124 } *mddev_dev_t;
 125
 126 typedef struct mapping {
 127         char *name;
 128         int num;
 129 } mapping_t;
 130
 131
 132 struct mdstat_ent {
 133         char            *dev;
 134         int             devnum;
 135         int             active;
 136         char            *level;
 137         char            *pattern; /* U or up, _ for down */
 138         int             percent; /* -1 if no resync */
 139         int             resync; /* 1 if resync, 0 if recovery */
 140         struct mdstat_ent *next;
 141 };
 142
 143 extern struct mdstat_ent *mdstat_read(int);
 144 extern void free_mdstat(struct mdstat_ent *ms);
 145 extern void mdstat_wait(int seconds);
 146
 147 #ifndef Sendmail
 148 #define Sendmail "/usr/lib/sendmail -t"
 149 #endif
 150
 151 extern char *map_num(mapping_t *map, int num);
 152 extern int map_name(mapping_t *map, char *name);
 153 extern mapping_t r5layout[], pers[], modes[], faultylayout[];
 154
 155 extern char *map_dev(int major, int minor);
 156
 157
 158 extern int Manage_ro(char *devname, int fd, int readonly);
 159 extern int Manage_runstop(char *devname, int fd, int runstop);
 160 extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
 161 extern int Manage_reconfig(char *devname, int fd, int layout);
 162 extern int Manage_subdevs(char *devname, int fd,
 163                           mddev_dev_t devlist);
 164 extern int Grow_Add_device(char *devname, int fd, char *newdev);
 165
 166
 167 extern int Assemble(char *mddev, int mdfd,
 168                     mddev_ident_t ident,
 169                     char *conffile,
 170                     mddev_dev_t devlist,
 171                     int readonly, int runstop,
 172                     char *update,
 173                     int verbose, int force);
 174
 175 extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
 176                  int raiddisks,
 177                  mddev_dev_t devlist, int assume_clean);
 178
 179
 180 extern int Create(char *mddev, int mdfd,
 181                   int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks,
 182                   int subdevs, mddev_dev_t devlist,
 183                   int runstop, int verbose, int force);
 184
 185 extern int Detail(char *dev, int brief, int test);
 186 extern int Query(char *dev);
 187 extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust);
 188 extern int Monitor(mddev_dev_t devlist,
 189                    char *mailaddr, char *alert_cmd,
 190                    int period, int daemonise, int scan, int oneshot,
 191                    char *config, int test, char *pidfile);
 192
 193 extern int Kill(char *dev, int force);
 194
 195 extern int md_get_version(int fd);
 196 extern int get_linux_version(void);
 197 extern int parse_uuid(char *str, int uuid[4]);
 198 extern int check_ext2(int fd, char *name);
 199 extern int check_reiser(int fd, char *name);
 200 extern int check_raid(int fd, char *name);
 201
 202 extern int get_mdp_major(void);
 203 extern int is_standard(char *dev, int *nump);
 204
 205
 206 extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
 207 extern mddev_dev_t conf_get_devs(char *conffile);
 208 extern char *conf_get_mailaddr(char *conffile);
 209 extern char *conf_get_program(char *conffile);
 210 extern char *conf_line(FILE *file);
 211 extern char *conf_word(FILE *file, int allow_key);
 212 extern void free_line(char *line);
 213 extern int match_oneof(char *devices, char *devname);
 214 extern int load_super(int fd, mdp_super_t *super);
 215 extern void uuid_from_super(int uuid[4], mdp_super_t *super);
 216 extern int same_uuid(int a[4], int b[4]);
 217 extern int compare_super(mdp_super_t *first, mdp_super_t *second);
 218 extern unsigned long calc_sb_csum(mdp_super_t *super);
 219 extern int store_super(int fd, mdp_super_t *super);
 220 extern int enough(int level, int raid_disks, int avail_disks);
 221 extern int ask(char *mesg);
 222
 223
 224 extern char *human_size(long long bytes);
 225 char *human_size_brief(long long bytes);
 226
 227 extern void put_md_name(char *name);
 228 extern char *get_md_name(int dev);
 229
 230 extern char DefaultConfFile[];
 231
 232 extern int open_mddev(char *dev, int autof);
 233
 234
 235 #define LEVEL_MULTIPATH         (-4)
 236 #define LEVEL_LINEAR            (-1)
 237 #define LEVEL_FAULTY            (-5)
 238
 239
 240 /* faulty stuff */
 241
 242 #define WriteTransient  0
 243 #define ReadTransient   1
 244 #define WritePersistent 2
 245 #define ReadPersistent  3
 246 #define WriteAll        4 /* doesn't go to device */
 247 #define ReadFixable     5
 248 #define Modes   6
 249
 250 #define ClearErrors     31
 251 #define ClearFaults     30
 252
 253 #define AllPersist      100 /* internal use only */
 254 #define NoPersist       101
 255
 256 #define ModeMask        0x1f
 257 #define ModeShift       5