Detail.c

   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 #include        "mdadm.h"
  31 #include        "md_p.h"
  32 #include        "md_u.h"
  33
  34 int Detail(char *dev, int brief)
  35 {
  36         /*
  37          * Print out details for an md array by using
  38          * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
  39          */
  40
  41         int fd = open(dev, O_RDONLY, 0);
  42         int vers;
  43         mdu_array_info_t array;
  44         int d;
  45         time_t atime;
  46         char *c;
  47         char *devices = NULL;
  48
  49         mdp_super_t super;
  50         int have_super = 0;
  51
  52         if (fd < 0) {
  53                 fprintf(stderr, Name ": cannot open %s: %s\n",
  54                         dev, strerror(errno));
  55                 return 1;
  56         }
  57         vers = md_get_version(fd);
  58         if (vers < 0) {
  59                 fprintf(stderr, Name ": %s does not appear to be an md device\n",
  60                         dev);
  61                 close(fd);
  62                 return 1;
  63         }
  64         if (vers < 9000) {
  65                 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
  66                         dev);
  67                 close(fd);
  68                 return 1;
  69         }
  70         if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
  71                 if (errno == ENODEV)
  72                         fprintf(stderr, Name ": md device %s does not appear to be active.\n",
  73                                 dev);
  74                 else
  75                         fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
  76                                 dev, strerror(errno));
  77                 close(fd);
  78                 return 1;
  79         }
  80         /* Ok, we have some info to print... */
  81         c = map_num(pers, array.level);
  82         if (brief)
  83                 printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
  84         else {
  85                 unsigned long array_size;
  86                 unsigned long long larray_size;
  87 #ifdef BLKGETSIZE64
  88                 if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
  89                         ;
  90                 else
  91 #endif
  92                         if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
  93                                 larray_size = array_size;
  94                                 larray_size <<= 9;
  95                         }
  96
  97                 else larray_size = 0;
  98
  99                 printf("%s:\n", dev);
 100                 printf("        Version : %02d.%02d.%02d\n",
 101                        array.major_version, array.minor_version, array.patch_version);
 102                 atime = array.ctime;
 103                 printf("  Creation Time : %.24s\n", ctime(&atime));
 104                 printf("     Raid Level : %s\n", c?c:"-unknown-");
 105                 if (larray_size)
 106                 printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
 107                 if (array.level >= 1)
 108                         printf("    Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
 109                 printf("   Raid Devices : %d\n", array.raid_disks);
 110                 printf("  Total Devices : %d\n", array.nr_disks);
 111                 printf("Preferred Minor : %d\n", array.md_minor);
 112                 printf("    Persistence : Superblock is %spersistent\n",
 113                        array.not_persistent?"not ":"");
 114                 printf("\n");
 115                 atime = array.utime;
 116                 printf("    Update Time : %.24s\n", ctime(&atime));
 117                 printf("          State : %s, %serrors\n",
 118                        (array.state&(1<<MD_SB_CLEAN))?"clean":"dirty",
 119                        (array.state&(1<<MD_SB_ERRORS))?"":"no-");
 120                 printf(" Active Devices : %d\n", array.active_disks);
 121                 printf("Working Devices : %d\n", array.working_disks);
 122                 printf(" Failed Devices : %d\n", array.failed_disks);
 123                 printf("  Spare Devices : %d\n", array.spare_disks);
 124                 printf("\n");
 125                 if (array.level == 5) {
 126                         c = map_num(r5layout, array.layout);
 127                         printf("         Layout : %s\n", c?c:"-unknown-");
 128                 }
 129                 switch (array.level) {
 130                 case 0:
 131                 case 4:
 132                 case 5:
 133                         printf("     Chunk Size : %dK\n", array.chunk_size/1024);
 134                         break;
 135                 case -1:
 136                         printf("       Rounding : %dK\n", array.chunk_size/1024);
 137                         break;
 138                 default: break;
 139                 }
 140
 141                 printf("\n");
 142                 printf("    Number   Major   Minor   RaidDevice State\n");
 143         }
 144         for (d= 0; d<MD_SB_DISKS; d++) {
 145                 mdu_disk_info_t disk;
 146                 char *dv;
 147                 disk.number = d;
 148                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 149                         if (d < array.raid_disks)
 150                                 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
 151                                         d, strerror(errno));
 152                         continue;
 153                 }
 154                 if (d >= array.raid_disks &&
 155                     disk.major == 0 &&
 156                     disk.minor == 0)
 157                         continue;
 158                 if (!brief) {
 159                         printf("   %5d   %5d    %5d    %5d     ",
 160                                disk.number, disk.major, disk.minor, disk.raid_disk);
 161                         if (disk.state & (1<<MD_DISK_FAULTY)) printf(" faulty");
 162                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 163                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
 164                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 165                         if (disk.state == 0) printf(" spare");
 166                 }
 167                 if ((dv=map_dev(disk.major, disk.minor))) {
 168                         if (brief) {
 169                                 if (devices) {
 170                                         devices = realloc(devices,
 171                                                           strlen(devices)+1+strlen(dv)+1);
 172                                         strcat(strcat(devices,","),dv);
 173                                 } else
 174                                         devices = strdup(dv);
 175                         } else
 176                                 printf("   %s", dv);
 177                         if (!have_super && (disk.state & (1<<MD_DISK_ACTIVE))) {
 178                                 /* try to read the superblock from this device
 179                                  * to get more info
 180                                  */
 181                                 int fd = open(dv, O_RDONLY);
 182                                 if (fd >=0 &&
 183                                     load_super(fd, &super) ==0 &&
 184                                     super.ctime == array.ctime &&
 185                                     super.level == array.level)
 186                                         have_super = 1;
 187                         }
 188                 }
 189                 if (!brief) printf("\n");
 190         }
 191         if (have_super) {
 192                 if (brief) printf(" UUID=");
 193                 else printf("           UUID : ");
 194                 if (super.minor_version >= 90)
 195                         printf("%08x:%08x:%08x:%08x", super.set_uuid0, super.set_uuid1,
 196                                super.set_uuid2, super.set_uuid3);
 197                 else
 198                         printf("%08x", super.set_uuid0);
 199                 if (!brief)
 200                         printf("\n         Events : %d.%d\n", super.events_hi, super.events_lo);
 201         }
 202         if (brief && devices) printf("\n   devices=%s", devices);
 203         if (brief) printf("\n");
 204         return 0;
 205 }