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 /* general information that might be extracted from a superblock */
  69 struct mdinfo {
  70         mdu_array_info_t        array;
  71         mdu_disk_info_t         disk;
  72         __u64                   events;
  73         unsigned int            uuid[4];
  74 };
  75
  76 #define Name "mdadm"
  77
  78 enum mode {
  79         ASSEMBLE=1,
  80         BUILD,
  81         CREATE,
  82         MANAGE,
  83         MISC,
  84         MONITOR,
  85         GROW,
  86 };
  87
  88 extern char short_options[];
  89 extern struct option long_options[];
  90 extern char Version[], Usage[], Help[], OptionHelp[],
  91         Help_create[], Help_build[], Help_assemble[], Help_grow[],
  92         Help_manage[], Help_misc[], Help_monitor[], Help_config[];
  93
  94 /* structures read from config file */
  95 /* List of mddevice names and identifiers
  96  * Identifiers can be:
  97  *    uuid=128-hex-uuid
  98  *    super-minor=decimal-minor-number-from-superblock
  99  *    devices=comma,separated,list,of,device,names,with,wildcards
 100  *
 101  * If multiple fields are present, the intersection of all matching
 102  * devices is considered
 103  */
 104 #define UnSet (0xfffe)
 105 typedef struct mddev_ident_s {
 106         char    *devname;
 107
 108         int     uuid_set;
 109         __u32   uuid[4];
 110
 111         unsigned int super_minor;
 112
 113         char    *devices;       /* comma separated list of device
 114                                  * names with wild cards
 115                                  */
 116         int     level;
 117         unsigned int raid_disks;
 118         unsigned int spare_disks;
 119         int     autof;          /* 1 for normal, 2 for partitioned */
 120         char    *spare_group;
 121
 122         struct mddev_ident_s *next;
 123 } *mddev_ident_t;
 124
 125 /* List of device names - wildcards expanded */
 126 typedef struct mddev_dev_s {
 127         char *devname;
 128         char disposition;       /* 'a' for add, 'r' for remove, 'f' for fail.
 129                                  * Not set for names read from .config
 130                                  */
 131         struct mddev_dev_s *next;
 132 } *mddev_dev_t;
 133
 134 typedef struct mapping {
 135         char *name;
 136         int num;
 137 } mapping_t;
 138
 139
 140 struct mdstat_ent {
 141         char            *dev;
 142         int             devnum;
 143         int             active;
 144         char            *level;
 145         char            *pattern; /* U or up, _ for down */
 146         int             percent; /* -1 if no resync */
 147         int             resync; /* 1 if resync, 0 if recovery */
 148         struct mdstat_ent *next;
 149 };
 150
 151 extern struct mdstat_ent *mdstat_read(int);
 152 extern void free_mdstat(struct mdstat_ent *ms);
 153 extern void mdstat_wait(int seconds);
 154
 155 #ifndef Sendmail
 156 #define Sendmail "/usr/lib/sendmail -t"
 157 #endif
 158
 159 extern char *map_num(mapping_t *map, int num);
 160 extern int map_name(mapping_t *map, char *name);
 161 extern mapping_t r5layout[], pers[], modes[], faultylayout[];
 162
 163 extern char *map_dev(int major, int minor);
 164
 165
 166 extern int Manage_ro(char *devname, int fd, int readonly);
 167 extern int Manage_runstop(char *devname, int fd, int runstop);
 168 extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
 169 extern int Manage_reconfig(char *devname, int fd, int layout);
 170 extern int Manage_subdevs(char *devname, int fd,
 171                           mddev_dev_t devlist);
 172 extern int Grow_Add_device(char *devname, int fd, char *newdev);
 173
 174
 175 extern int Assemble(char *mddev, int mdfd,
 176                     mddev_ident_t ident,
 177                     char *conffile,
 178                     mddev_dev_t devlist,
 179                     int readonly, int runstop,
 180                     char *update,
 181                     int verbose, int force);
 182
 183 extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
 184                  int raiddisks,
 185                  mddev_dev_t devlist, int assume_clean);
 186
 187
 188 extern int Create(char *mddev, int mdfd,
 189                   int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks,
 190                   int subdevs, mddev_dev_t devlist,
 191                   int runstop, int verbose, int force);
 192
 193 extern int Detail(char *dev, int brief, int test);
 194 extern int Query(char *dev);
 195 extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust);
 196 extern int Monitor(mddev_dev_t devlist,
 197                    char *mailaddr, char *alert_cmd,
 198                    int period, int daemonise, int scan, int oneshot,
 199                    char *config, int test, char *pidfile);
 200
 201 extern int Kill(char *dev, int force);
 202
 203 extern int md_get_version(int fd);
 204 extern int get_linux_version(void);
 205 extern int parse_uuid(char *str, int uuid[4]);
 206 extern int check_ext2(int fd, char *name);
 207 extern int check_reiser(int fd, char *name);
 208 extern int check_raid(int fd, char *name);
 209
 210 extern int get_mdp_major(void);
 211 extern int is_standard(char *dev, int *nump);
 212
 213
 214 extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
 215 extern mddev_dev_t conf_get_devs(char *conffile);
 216 extern char *conf_get_mailaddr(char *conffile);
 217 extern char *conf_get_program(char *conffile);
 218 extern char *conf_line(FILE *file);
 219 extern char *conf_word(FILE *file, int allow_key);
 220 extern void free_line(char *line);
 221 extern int match_oneof(char *devices, char *devname);
 222 extern void uuid_from_super(int uuid[4], mdp_super_t *super);
 223 extern int same_uuid(int a[4], int b[4]);
 224 /* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/
 225 extern unsigned long calc_csum(void *super, int bytes);
 226 extern int store_super(int fd, mdp_super_t *super);
 227 extern int enough(int level, int raid_disks, int avail_disks);
 228 extern int ask(char *mesg);
 229
 230
 231 extern char *human_size(long long bytes);
 232 char *human_size_brief(long long bytes);
 233
 234 extern void put_md_name(char *name);
 235 extern char *get_md_name(int dev);
 236
 237 extern char DefaultConfFile[];
 238
 239 extern int open_mddev(char *dev, int autof);
 240
 241
 242 #define LEVEL_MULTIPATH         (-4)
 243 #define LEVEL_LINEAR            (-1)
 244 #define LEVEL_FAULTY            (-5)
 245
 246
 247 /* faulty stuff */
 248
 249 #define WriteTransient  0
 250 #define ReadTransient   1
 251 #define WritePersistent 2
 252 #define ReadPersistent  3
 253 #define WriteAll        4 /* doesn't go to device */
 254 #define ReadFixable     5
 255 #define Modes   6
 256
 257 #define ClearErrors     31
 258 #define ClearFaults     30
 259
 260 #define AllPersist      100 /* internal use only */
 261 #define NoPersist       101
 262
 263 #define ModeMask        0x1f
 264 #define ModeShift       5
 265
 266 extern void examine_super0(void *sbv);
 267 extern void brief_examine_super0(void *sbv);
 268 extern void detail_super0(void *sbv);
 269 extern void brief_detail_super0(void *sbv);
 270 extern void getinfo_super0(struct mdinfo *info, void *sbv);
 271 extern int update_super0(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose);
 272 extern __u64 event_super0(void *sbv);
 273 extern void uuid_from_super0(int uuid[4], void * sbv);
 274 extern void init_super0(void **sbv, mdu_array_info_t *info);
 275 extern void add_to_super0(void *sbp, mdu_disk_info_t *dinfo);
 276 extern int store_super0(int fd, mdp_super_t *super);
 277 extern int write_init_super0(void *sbv, mdu_disk_info_t *dinfo, char *devname);
 278 extern int load_super0(int fd, void **super, char *devname);
 279 extern int compare_super0(void **first, void *second);