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