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, int test)
  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         int spares = 0;
  49
  50         mdp_super_t super;
  51         int have_super = 0;
  52         int rv = test ? 4 : 1;
  53
  54         if (fd < 0) {
  55                 fprintf(stderr, Name ": cannot open %s: %s\n",
  56                         dev, strerror(errno));
  57                 return rv;
  58         }
  59         vers = md_get_version(fd);
  60         if (vers < 0) {
  61                 fprintf(stderr, Name ": %s does not appear to be an md device\n",
  62                         dev);
  63                 close(fd);
  64                 return rv;
  65         }
  66         if (vers < 9000) {
  67                 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
  68                         dev);
  69                 close(fd);
  70                 return rv;
  71         }
  72         if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
  73                 if (errno == ENODEV)
  74                         fprintf(stderr, Name ": md device %s does not appear to be active.\n",
  75                                 dev);
  76                 else
  77                         fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
  78                                 dev, strerror(errno));
  79                 close(fd);
  80                 return rv;
  81         }
  82         rv = 0;
  83         /* Ok, we have some info to print... */
  84         c = map_num(pers, array.level);
  85         if (brief)
  86                 printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
  87         else {
  88                 unsigned long array_size;
  89                 unsigned long long larray_size;
  90 #ifdef BLKGETSIZE64
  91                 if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
  92                         ;
  93                 else
  94 #endif
  95                         if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
  96                                 larray_size = array_size;
  97                                 larray_size <<= 9;
  98                         }
  99
 100                 else larray_size = 0;
 101
 102                 printf("%s:\n", dev);
 103                 printf("        Version : %02d.%02d.%02d\n",
 104                        array.major_version, array.minor_version, array.patch_version);
 105                 atime = array.ctime;
 106                 printf("  Creation Time : %.24s\n", ctime(&atime));
 107                 printf("     Raid Level : %s\n", c?c:"-unknown-");
 108                 if (larray_size)
 109                 printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
 110                 if (array.level >= 1)
 111                         printf("    Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
 112                 printf("   Raid Devices : %d\n", array.raid_disks);
 113                 printf("  Total Devices : %d\n", array.nr_disks);
 114                 printf("Preferred Minor : %d\n", array.md_minor);
 115                 printf("    Persistence : Superblock is %spersistent\n",
 116                        array.not_persistent?"not ":"");
 117                 printf("\n");
 118                 atime = array.utime;
 119                 printf("    Update Time : %.24s\n", ctime(&atime));
 120                 printf("          State : %s, %serrors\n",
 121                        (array.state&(1<<MD_SB_CLEAN))?"clean":"dirty",
 122                        (array.state&(1<<MD_SB_ERRORS))?"":"no-");
 123                 printf(" Active Devices : %d\n", array.active_disks);
 124                 printf("Working Devices : %d\n", array.working_disks);
 125                 printf(" Failed Devices : %d\n", array.failed_disks);
 126                 printf("  Spare Devices : %d\n", array.spare_disks);
 127                 printf("\n");
 128                 if (array.level == 5) {
 129                         c = map_num(r5layout, array.layout);
 130                         printf("         Layout : %s\n", c?c:"-unknown-");
 131                 }
 132                 switch (array.level) {
 133                 case 0:
 134                 case 4:
 135                 case 5:
 136                         printf("     Chunk Size : %dK\n", array.chunk_size/1024);
 137                         break;
 138                 case -1:
 139                         printf("       Rounding : %dK\n", array.chunk_size/1024);
 140                         break;
 141                 default: break;
 142                 }
 143
 144                 printf("\n");
 145                 {
 146                         struct mdstat_ent *ms = mdstat_read();
 147                         struct mdstat_ent *e;
 148                         for (e=ms; e; e=e->next)
 149                                 if (e->devnum == array.md_minor) {
 150                                         if (e->percent >= 0)
 151                                                 printf(" Rebuild Status : %d%% complete\n\n", e->percent);
 152                                         break;
 153                                 }
 154                         free_mdstat(ms);
 155                 }
 156                 printf("    Number   Major   Minor   RaidDevice State\n");
 157         }
 158         for (d= 0; d<MD_SB_DISKS; d++) {
 159                 mdu_disk_info_t disk;
 160                 char *dv;
 161                 disk.number = d;
 162                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 163                         if (d < array.raid_disks)
 164                                 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
 165                                         d, strerror(errno));
 166                         continue;
 167                 }
 168                 if (d >= array.raid_disks &&
 169                     disk.major == 0 &&
 170                     disk.minor == 0)
 171                         continue;
 172                 if (!brief) {
 173                         printf("   %5d   %5d    %5d    %5d     ",
 174                                disk.number, disk.major, disk.minor, disk.raid_disk);
 175                         if (disk.state & (1<<MD_DISK_FAULTY)) printf(" faulty");
 176                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 177                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
 178                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 179                         if (disk.state == 0) { printf(" spare"); spares++; }
 180                 }
 181                 if (test && d < array.raid_disks && disk.state & (1<<MD_DISK_FAULTY)) {
 182                         if ((rv & 1) && (array.level ==4 || array.level == 5))
 183                                 rv |= 2;
 184                         rv |= 1;
 185                 }
 186                 if ((dv=map_dev(disk.major, disk.minor))) {
 187                         if (brief) {
 188                                 if (devices) {
 189                                         devices = realloc(devices,
 190                                                           strlen(devices)+1+strlen(dv)+1);
 191                                         strcat(strcat(devices,","),dv);
 192                                 } else
 193                                         devices = strdup(dv);
 194                         } else
 195                                 printf("   %s", dv);
 196                         if (!have_super && (disk.state & (1<<MD_DISK_ACTIVE))) {
 197                                 /* try to read the superblock from this device
 198                                  * to get more info
 199                                  */
 200                                 int fd = open(dv, O_RDONLY);
 201                                 if (fd >=0 &&
 202                                     load_super(fd, &super) ==0 &&
 203                                     (unsigned long)super.ctime == (unsigned long)array.ctime &&
 204                                     (unsigned int)super.level == (unsigned int)array.level)
 205                                         have_super = 1;
 206                         }
 207                 }
 208                 if (!brief) printf("\n");
 209         }
 210         if (spares && brief) printf(" spares=%d", spares);
 211         if (have_super) {
 212                 if (brief) printf(" UUID=");
 213                 else printf("           UUID : ");
 214                 if (super.minor_version >= 90)
 215                         printf("%08x:%08x:%08x:%08x", super.set_uuid0, super.set_uuid1,
 216                                super.set_uuid2, super.set_uuid3);
 217                 else
 218                         printf("%08x", super.set_uuid0);
 219                 if (!brief)
 220                         printf("\n         Events : %d.%d\n", super.events_hi, super.events_lo);
 221         }
 222         if (brief && devices) printf("\n   devices=%s", devices);
 223         if (brief) printf("\n");
 224         if (test && (rv&2)) rv &= ~1;
 225         return rv;
 226 }