mdadm-0.7.1
[thirdparty/mdadm.git] / 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 disks=%d", dev, c?c:"-unknown-",array.raid_disks );
83         else {
84                 long array_size;
85                 long long larray_size;
86                 if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
87                         ;
88                 else if (ioctl(fd, BLKGETSIZE, &array_size)==0)
89                         larray_size = array_size<<9;
90                 else larray_size = 0;
91
92                 printf("%s:\n", dev);
93                 printf("        Version : %02d.%02d.%02d\n",
94                        array.major_version, array.minor_version, array.patch_version);
95                 atime = array.ctime;
96                 printf("  Creation Time : %.24s\n", ctime(&atime));
97                 printf("     Raid Level : %s\n", c?c:"-unknown-");
98                 if (larray_size)
99                 printf("     Array Size : %ld%s\n", (long)(larray_size>>10), human_size(larray_size));
100                 if (array.level >= 1)
101                         printf("    Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
102                 printf("     Raid Disks : %d\n", array.raid_disks);
103                 printf("    Total Disks : %d\n", array.nr_disks);
104                 printf("Preferred Minor : %d\n", array.md_minor);
105                 printf("    Persistance : Superblock is %spersistant\n",
106                        array.not_persistent?"not ":"");
107                 printf("\n");
108                 atime = array.utime;
109                 printf("    Update Time : %.24s\n", ctime(&atime));
110                 printf("          State : %s, %serrors\n",
111                        (array.state&(1<<MD_SB_CLEAN))?"clean":"dirty",
112                        (array.state&(1<<MD_SB_ERRORS))?"":"no-");
113                 printf("  Active Drives : %d\n", array.active_disks);
114                 printf(" Working Drives : %d\n", array.working_disks);
115                 printf("  Failed Drives : %d\n", array.failed_disks);
116                 printf("   Spare Drives : %d\n", array.spare_disks);
117                 printf("\n");
118                 if (array.level == 5) {
119                         c = map_num(r5layout, array.layout);
120                         printf("         Layout : %s\n", c?c:"-unknown-");
121                 }
122                 switch (array.level) {
123                 case 0:
124                 case 4:
125                 case 5:
126                         printf("     Chunk Size : %dK\n", array.chunk_size/1024);
127                         break;
128                 case -1:
129                         printf("       Rounding : %dK\n", array.chunk_size/1024);
130                         break;
131                 default: break;
132                 }
133         
134                 printf("\n");
135                 printf("    Number   Major   Minor   RaidDisk   State\n");
136         }
137         for (d= 0; d<array.raid_disks+array.spare_disks; d++) {
138                 mdu_disk_info_t disk;
139                 char *dv;
140                 disk.number = d;
141                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
142                         fprintf(stderr, Name ": cannot get disk detail for disk %d: %s\n",
143                                 d, strerror(errno));
144                         continue;
145                 }
146                 if (!brief) {
147                         printf("   %5d   %5d    %5d    %5d     ", 
148                                disk.number, disk.major, disk.minor, disk.raid_disk);
149                         if (disk.state & (1<<MD_DISK_FAULTY)) printf(" faulty");
150                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
151                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
152                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
153                 }
154                 if ((dv=map_dev(disk.major, disk.minor))) {
155                         if (!brief) printf("   %s", dv);
156                         if (!have_super) {
157                                 /* try to read the superblock from this device
158                                  * to get more info
159                                  */
160                                 int fd = open(dv, O_RDONLY);
161                                 if (fd >=0 &&
162                                     load_super(fd, &super) ==0 &&
163                                     super.ctime == array.ctime &&
164                                     super.level == array.level)
165                                         have_super = 1;
166                         }
167                 }
168                 if (!brief) printf("\n");
169         }
170         if (have_super) {
171                 if (brief) printf(" UUID=");
172                 else printf("           UUID : ");
173                 if (super.minor_version >= 90)
174                         printf("%08x:%08x:%08x:%08x", super.set_uuid0, super.set_uuid1,
175                                super.set_uuid2, super.set_uuid3);
176                 else
177                         printf("%08x", super.set_uuid0);
178                 if (!brief) printf("\n");
179         }
180         if (brief) printf("\n");
181         return 0;
182 }