Detail.c

   1 /*
   2  * mdctl - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001 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        "mdctl.h"
  31 #include        "md_p.h"
  32 #include        "md_u.h"
  33
  34 int Detail(char *dev)
  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         printf("%s:\n", dev);
  81         printf("        Version : %02d.%02d.%02d\n",
  82                array.major_version, array.minor_version, array.patch_version);
  83         atime = array.ctime;
  84         printf("  Creation Time : %.24s\n", ctime(&atime));
  85         c = map_num(pers, array.level);
  86         printf("     Raid Level : %s\n", c?c:"-unknown-");
  87         printf("           Size : %d\n", array.size);
  88         printf("     Raid Disks : %d\n", array.raid_disks);
  89         printf("    Total Disks : %d\n", array.nr_disks);
  90         printf("Preferred Minor : %d\n", array.md_minor);
  91         printf("    Persistance : Superblock is %spersistant\n",
  92                array.not_persistent?"not ":"");
  93         printf("\n");
  94         atime = array.utime;
  95         printf("    Update Time : %.24s\n", ctime(&atime));
  96         printf("          State : %s, %serrors\n",
  97                (array.state&(1<<MD_SB_CLEAN))?"clean":"dirty",
  98                (array.state&(1<<MD_SB_ERRORS))?"":"no-");
  99         printf("  Active Drives : %d\n", array.active_disks);
 100         printf(" Working Drives : %d\n", array.working_disks);
 101         printf("  Failed Drives : %d\n", array.failed_disks);
 102         printf("   Spare Drives : %d\n", array.spare_disks);
 103         printf("\n");
 104         if (array.level == 5) {
 105                 c = map_num(r5layout, array.layout);
 106                 printf("         Layout : %s\n", c?c:"-unknown-");
 107         }
 108         switch (array.level) {
 109         case 0:
 110         case 4:
 111         case 5:
 112                 printf("     Chunk Size : %dK\n", array.chunk_size/1024);
 113                 break;
 114         case -1:
 115                 printf("       Rounding : %dK\n", array.chunk_size/1024);
 116                 break;
 117         default: break;
 118         }
 119
 120         printf("\n");
 121         printf("    Number   Major   Minor   RaidDisk   State\n");
 122         for (d= 0; d<array.raid_disks+array.spare_disks; d++) {
 123                 mdu_disk_info_t disk;
 124                 char *dv;
 125                 disk.number = d;
 126                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 127                         fprintf(stderr, Name ": cannot get disk detail for disk %d: %s\n",
 128                                 d, strerror(errno));
 129                         continue;
 130                 }
 131                 printf("   %5d   %5d    %5d    %5d     ",
 132                        disk.number, disk.major, disk.minor, disk.raid_disk);
 133                 if (disk.state & (1<<MD_DISK_FAULTY)) printf(" faulty");
 134                 if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 135                 if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
 136                 if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 137                 if ((dv=map_dev(disk.major, disk.minor))) {
 138                     printf("   %s", dv);
 139                     if (!have_super) {
 140                         /* try to read the superblock from this device
 141                          * to get more info
 142                          */
 143                         int fd = open(dv, O_RDONLY);
 144                         if (fd >=0 &&
 145                             load_super(fd, &super) ==0 &&
 146                             super.ctime == array.ctime &&
 147                             super.level == array.level)
 148                             have_super = 1;
 149                     }
 150                 }
 151                 printf("\n");
 152         }
 153         if (have_super) {
 154                 if (super.minor_version >= 90)
 155                 printf("           UUID : %08x:%08x:%08x:%08x\n", super.set_uuid0, super.set_uuid1,
 156                        super.set_uuid2, super.set_uuid3);
 157         else
 158                 printf("           UUID : %08x\n", super.set_uuid0);
 159         }
 160         return 0;
 161 }