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         struct stat stb;
  50
  51         mdp_super_t super;
  52         int have_super = 0;
  53         int rv = test ? 4 : 1;
  54
  55         if (fd < 0) {
  56                 fprintf(stderr, Name ": cannot open %s: %s\n",
  57                         dev, strerror(errno));
  58                 return rv;
  59         }
  60         vers = md_get_version(fd);
  61         if (vers < 0) {
  62                 fprintf(stderr, Name ": %s does not appear to be an md device\n",
  63                         dev);
  64                 close(fd);
  65                 return rv;
  66         }
  67         if (vers < 9000) {
  68                 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
  69                         dev);
  70                 close(fd);
  71                 return rv;
  72         }
  73         if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
  74                 if (errno == ENODEV)
  75                         fprintf(stderr, Name ": md device %s does not appear to be active.\n",
  76                                 dev);
  77                 else
  78                         fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
  79                                 dev, strerror(errno));
  80                 close(fd);
  81                 return rv;
  82         }
  83         if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
  84                 stb.st_rdev = 0;
  85         rv = 0;
  86         /* Ok, we have some info to print... */
  87         c = map_num(pers, array.level);
  88         if (brief)
  89                 printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
  90         else {
  91                 unsigned long array_size;
  92                 unsigned long long larray_size;
  93                 struct mdstat_ent *ms = mdstat_read(0);
  94                 struct mdstat_ent *e;
  95                 int devnum = array.md_minor;
  96                 if (MAJOR(stb.st_rdev) != MD_MAJOR)
  97                         devnum = -1 - devnum;
  98
  99                 for (e=ms; e; e=e->next)
 100                         if (e->devnum == devnum)
 101                                 break;
 102 #ifdef BLKGETSIZE64
 103                 if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
 104                         ;
 105                 else
 106 #endif
 107                         if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
 108                                 larray_size = array_size;
 109                                 larray_size <<= 9;
 110                         }
 111
 112                 else larray_size = 0;
 113
 114                 printf("%s:\n", dev);
 115                 printf("        Version : %02d.%02d.%02d\n",
 116                        array.major_version, array.minor_version, array.patch_version);
 117                 atime = array.ctime;
 118                 printf("  Creation Time : %.24s\n", ctime(&atime));
 119                 printf("     Raid Level : %s\n", c?c:"-unknown-");
 120                 if (larray_size)
 121                         printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
 122                 if (array.level >= 1)
 123                         printf("    Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
 124                 printf("   Raid Devices : %d\n", array.raid_disks);
 125                 printf("  Total Devices : %d\n", array.nr_disks);
 126                 printf("Preferred Minor : %d\n", array.md_minor);
 127                 printf("    Persistence : Superblock is %spersistent\n",
 128                        array.not_persistent?"not ":"");
 129                 printf("\n");
 130                 atime = array.utime;
 131                 printf("    Update Time : %.24s\n", ctime(&atime));
 132                 printf("          State : %s%s%s\n",
 133                        (array.state&(1<<MD_SB_CLEAN))?"clean":"dirty",
 134                        array.active_disks < array.raid_disks? ", degraded":"",
 135                        (e && e->percent >= 0) ? ", recovering": "");
 136                 printf(" Active Devices : %d\n", array.active_disks);
 137                 printf("Working Devices : %d\n", array.working_disks);
 138                 printf(" Failed Devices : %d\n", array.failed_disks);
 139                 printf("  Spare Devices : %d\n", array.spare_disks);
 140                 printf("\n");
 141                 if (array.level == 5) {
 142                         c = map_num(r5layout, array.layout);
 143                         printf("         Layout : %s\n", c?c:"-unknown-");
 144                 }
 145                 switch (array.level) {
 146                 case 0:
 147                 case 4:
 148                 case 5:
 149                         printf("     Chunk Size : %dK\n", array.chunk_size/1024);
 150                         break;
 151                 case -1:
 152                         printf("       Rounding : %dK\n", array.chunk_size/1024);
 153                         break;
 154                 default: break;
 155                 }
 156
 157                 printf("\n");
 158
 159                 if (e && e->percent >= 0)
 160                         printf(" Rebuild Status : %d%% complete\n\n", e->percent);
 161                 free_mdstat(ms);
 162
 163                 printf("    Number   Major   Minor   RaidDevice State\n");
 164         }
 165         for (d= 0; d<MD_SB_DISKS; d++) {
 166                 mdu_disk_info_t disk;
 167                 char *dv;
 168                 disk.number = d;
 169                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 170                         if (d < array.raid_disks)
 171                                 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
 172                                         d, strerror(errno));
 173                         continue;
 174                 }
 175                 if (d >= array.raid_disks &&
 176                     disk.major == 0 &&
 177                     disk.minor == 0)
 178                         continue;
 179                 if (!brief) {
 180                         printf("   %5d   %5d    %5d    %5d     ",
 181                                disk.number, disk.major, disk.minor, disk.raid_disk);
 182                         if (disk.state & (1<<MD_DISK_FAULTY)) printf(" faulty");
 183                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 184                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
 185                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 186                         if (disk.state == 0) { printf(" spare"); spares++; }
 187                 }
 188                 if (test && d < array.raid_disks && disk.state & (1<<MD_DISK_FAULTY)) {
 189                         if ((rv & 1) && (array.level ==4 || array.level == 5))
 190                                 rv |= 2;
 191                         rv |= 1;
 192                 }
 193                 if ((dv=map_dev(disk.major, disk.minor))) {
 194                         if (brief) {
 195                                 if (devices) {
 196                                         devices = realloc(devices,
 197                                                           strlen(devices)+1+strlen(dv)+1);
 198                                         strcat(strcat(devices,","),dv);
 199                                 } else
 200                                         devices = strdup(dv);
 201                         } else
 202                                 printf("   %s", dv);
 203                         if (!have_super && (disk.state & (1<<MD_DISK_ACTIVE))) {
 204                                 /* try to read the superblock from this device
 205                                  * to get more info
 206                                  */
 207                                 int fd = open(dv, O_RDONLY);
 208                                 if (fd >=0 &&
 209                                     load_super(fd, &super) ==0 &&
 210                                     (unsigned long)super.ctime == (unsigned long)array.ctime &&
 211                                     (unsigned int)super.level == (unsigned int)array.level)
 212                                         have_super = 1;
 213                         }
 214                 }
 215                 if (!brief) printf("\n");
 216         }
 217         if (spares && brief) printf(" spares=%d", spares);
 218         if (have_super) {
 219                 if (brief) printf(" UUID=");
 220                 else printf("           UUID : ");
 221                 if (super.minor_version >= 90)
 222                         printf("%08x:%08x:%08x:%08x", super.set_uuid0, super.set_uuid1,
 223                                super.set_uuid2, super.set_uuid3);
 224                 else
 225                         printf("%08x", super.set_uuid0);
 226                 if (!brief)
 227                         printf("\n         Events : %d.%d\n", super.events_hi, super.events_lo);
 228         }
 229         if (brief && devices) printf("\n   devices=%s", devices);
 230         if (brief) printf("\n");
 231         if (test && (rv&2)) rv &= ~1;
 232         return rv;
 233 }