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/ioctl.h>
  47 #define MD_MAJOR 9
  48
  49 /* I seem to need this to make BLKGETSIZE64 to work... */
  50 #define u64 __u64
  51
  52
  53 #include        "md_u.h"
  54
  55 #define Name "mdadm"
  56
  57 extern char short_options[];
  58 extern struct option long_options[];
  59 extern char Version[], Usage[], Help[], Help_create[], Help_build[], Help_assemble[];
  60
  61 /* structures read from config file */
  62 /* List of mddevice names and identifiers
  63  * Identifiers can be:
  64  *    uuid=128-hex-uuid
  65  *    super-minor=decimal-minor-number-from-superblock
  66  *    devices=comma,separated,list,of,device,names,with,wildcards
  67  *
  68  * If multiple fields are present, the intersection of all matching
  69  * devices is considered
  70  */
  71 typedef struct mddev_ident_s {
  72         char *devname;
  73
  74         int uuid_set;
  75         __u32 uuid[4];
  76
  77         int super_minor;        /* -1 if not set */
  78
  79         char *devices;          /* comma separated list of device
  80                                  * names with wild cards
  81                                  */
  82         int level;              /* -10 if not set */
  83         int raid_disks;         /* -1 if not set */
  84         char *spare_group;
  85         struct mddev_ident_s *next;
  86 } *mddev_ident_t;
  87
  88 /* List of device names - wildcards expanded */
  89 typedef struct mddev_dev_s {
  90         char *devname;
  91         char disposition;       /* 'a' for add, 'r' for remove, 'f' for fail.
  92                                  * Not set for names read from .config
  93                                  */
  94         struct mddev_dev_s *next;
  95 } *mddev_dev_t;
  96
  97 typedef struct mapping {
  98         char *name;
  99         int num;
 100 } mapping_t;
 101
 102 #ifndef Sendmail
 103 #define Sendmail "/usr/lib/sendmail -t"
 104 #endif
 105
 106 extern char *map_num(mapping_t *map, int num);
 107 extern int map_name(mapping_t *map, char *name);
 108 extern mapping_t r5layout[], pers[];
 109
 110 extern char *map_dev(int major, int minor);
 111
 112
 113 extern int Manage_ro(char *devname, int fd, int readonly);
 114 extern int Manage_runstop(char *devname, int fd, int runstop);
 115 extern int Manage_subdevs(char *devname, int fd,
 116                           mddev_dev_t devlist);
 117
 118
 119 extern int Assemble(char *mddev, int mdfd,
 120                     mddev_ident_t ident,
 121                     char *conffile,
 122                     mddev_dev_t devlist,
 123                     int readonly, int runstop,
 124                     int verbose, int force);
 125
 126 extern int Build(char *mddev, int mdfd, int chunk, int level,
 127                  int raiddisks,
 128                  mddev_dev_t devlist);
 129
 130
 131 extern int Create(char *mddev, int mdfd,
 132                   int chunk, int level, int layout, int size, int raiddisks, int sparedisks,
 133                   int subdevs, mddev_dev_t devlist,
 134                   int runstop, int verbose, int force);
 135
 136 extern int Detail(char *dev, int brief);
 137 extern int Examine(mddev_dev_t devlist, int brief, char *conffile);
 138 extern int Monitor(mddev_dev_t devlist,
 139                   char *mailaddr, char *alert_cmd,
 140                   int period,
 141                   char *config);
 142
 143 extern int Kill(char *dev, int force);
 144
 145 extern int md_get_version(int fd);
 146 extern int get_linux_version();
 147 extern int parse_uuid(char *str, int uuid[4]);
 148 extern int check_ext2(int fd, char *name);
 149 extern int check_reiser(int fd, char *name);
 150 extern int check_raid(int fd, char *name);
 151
 152 extern mddev_ident_t conf_get_ident(char *, char*);
 153 extern mddev_dev_t conf_get_devs(char *);
 154
 155 extern char *human_size(long long bytes);