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64c4757e 1/*
9a9dab36 2 * mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e 3 *
4f589ad0 4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
64c4757e
NB
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
9a9dab36 30#include "mdadm.h"
64c4757e
NB
31#include "md_p.h"
32#include "md_u.h"
33
54bad364 34int Detail(char *dev, int brief, int export, int test, char *homehost)
64c4757e
NB
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;
b0c63f32
NB
44 mdu_disk_info_t *disks;
45 int next;
64c4757e
NB
46 int d;
47 time_t atime;
682c7051 48 char *c;
d013a55e 49 char *devices = NULL;
feb716e9 50 int spares = 0;
dd0781e5 51 struct stat stb;
e5329c37
NB
52 int is_26 = get_linux_version() >= 2006000;
53 int is_rebuilding = 0;
54 int failed = 0;
82d9eba6 55 struct supertype *st = NULL;
e27d562b 56 int max_disks = MD_SB_DISKS; /* just a default */
bed256c2 57 struct mdinfo info;
64c4757e 58
4b1ac34b 59 void *super = NULL;
feb716e9 60 int rv = test ? 4 : 1;
a77be586
NB
61 int avail_disks = 0;
62 char *avail;
82b27616 63
64c4757e 64 if (fd < 0) {
682c7051 65 fprintf(stderr, Name ": cannot open %s: %s\n",
64c4757e 66 dev, strerror(errno));
feb716e9 67 return rv;
64c4757e
NB
68 }
69 vers = md_get_version(fd);
70 if (vers < 0) {
682c7051 71 fprintf(stderr, Name ": %s does not appear to be an md device\n",
64c4757e
NB
72 dev);
73 close(fd);
feb716e9 74 return rv;
64c4757e 75 }
682c7051
NB
76 if (vers < 9000) {
77 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
64c4757e
NB
78 dev);
79 close(fd);
feb716e9 80 return rv;
64c4757e
NB
81 }
82 if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
83 if (errno == ENODEV)
682c7051 84 fprintf(stderr, Name ": md device %s does not appear to be active.\n",
64c4757e
NB
85 dev);
86 else
682c7051 87 fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
64c4757e
NB
88 dev, strerror(errno));
89 close(fd);
feb716e9 90 return rv;
64c4757e 91 }
82d9eba6 92 st = super_by_version(array.major_version, array.minor_version);
f9ce90ba 93
dd0781e5
NB
94 if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
95 stb.st_rdev = 0;
feb716e9 96 rv = 0;
e5329c37 97
ea329559
NB
98 if (st) max_disks = st->max_devs;
99
e5329c37 100 /* try to load a superblock */
ea329559 101 for (d= 0; d<max_disks; d++) {
e5329c37
NB
102 mdu_disk_info_t disk;
103 char *dv;
104 disk.number = d;
105 if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
106 continue;
107 if (d >= array.raid_disks &&
108 disk.major == 0 &&
109 disk.minor == 0)
110 continue;
16c6fa80 111 if ((dv=map_dev(disk.major, disk.minor, 1))) {
4b1ac34b 112 if (!super && (disk.state & (1<<MD_DISK_ACTIVE))) {
e5329c37
NB
113 /* try to read the superblock from this device
114 * to get more info
115 */
16c6fa80 116 int fd2 = dev_open(dv, O_RDONLY);
82d9eba6
NB
117 if (fd2 >=0 && st &&
118 st->ss->load_super(st, fd2, &super, NULL) == 0) {
31317663 119 st->ss->getinfo_super(&info, super);
4b1ac34b
NB
120 if (info.array.ctime != array.ctime ||
121 info.array.level != array.level) {
122 free(super);
123 super = NULL;
124 }
125 }
e5329c37
NB
126 if (fd2 >= 0) close(fd2);
127 }
128 }
129 }
130
64c4757e 131 /* Ok, we have some info to print... */
682c7051 132 c = map_num(pers, array.level);
54bad364
KS
133
134 if (export) {
135 if (c)
136 printf("MD_LEVEL=%s\n", c);
137 printf("MD_DEVICES=%d\n", array.raid_disks);
138 printf("MD_METADATA=%d.%d\n", array.major_version,
139 array.minor_version);
140 st->ss->export_super(super);
141 goto out;
142 }
143
144 if (brief)
b83d95f3 145 printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
cd29a5c8 146 else {
8fac0577 147 mdu_bitmap_file_t bmf;
e0d19036 148 unsigned long long larray_size;
22a88995 149 struct mdstat_ent *ms = mdstat_read(0, 0);
dd0781e5
NB
150 struct mdstat_ent *e;
151 int devnum = array.md_minor;
0df46c2a 152 if (major(stb.st_rdev) != MD_MAJOR)
dd0781e5
NB
153 devnum = -1 - devnum;
154
155 for (e=ms; e; e=e->next)
156 if (e->devnum == devnum)
157 break;
beae1dfe
NB
158 if (!get_dev_size(fd, NULL, &larray_size))
159 larray_size = 0;
56eb10c0 160
cd29a5c8
NB
161 printf("%s:\n", dev);
162 printf(" Version : %02d.%02d.%02d\n",
163 array.major_version, array.minor_version, array.patch_version);
164 atime = array.ctime;
165 printf(" Creation Time : %.24s\n", ctime(&atime));
166 printf(" Raid Level : %s\n", c?c:"-unknown-");
56eb10c0 167 if (larray_size)
dd0781e5 168 printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
3d4064cc
NB
169 if (array.level >= 1) {
170 if (array.major_version != 0 &&
6ee5c05a
NB
171 (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
172 unsigned long long dsize = get_component_size(fd);
173 if (dsize > 0)
e3362544
NB
174 printf(" Used Dev Size : %llu%s\n",
175 dsize,
176 human_size((long long)array.size<<10));
6ee5c05a 177 else
e3362544 178 printf(" Used Dev Size : unknown\n");
6ee5c05a 179 } else
e3362544
NB
180 printf(" Used Dev Size : %d%s\n", array.size,
181 human_size((long long)array.size<<10));
3d4064cc 182 }
b83d95f3
NB
183 printf(" Raid Devices : %d\n", array.raid_disks);
184 printf(" Total Devices : %d\n", array.nr_disks);
cd29a5c8 185 printf("Preferred Minor : %d\n", array.md_minor);
b83d95f3 186 printf(" Persistence : Superblock is %spersistent\n",
cd29a5c8
NB
187 array.not_persistent?"not ":"");
188 printf("\n");
4027ddca
NB
189 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
190 if (vers >= 9001 &&
191 ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
192 bmf.pathname[0]) {
8fac0577
NB
193 printf(" Intent Bitmap : %s\n", bmf.pathname);
194 printf("\n");
195 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
196 printf(" Intent Bitmap : Internal\n\n");
cd29a5c8
NB
197 atime = array.utime;
198 printf(" Update Time : %.24s\n", ctime(&atime));
120230a4 199 printf(" State : %s%s%s%s\n",
182661f4 200 (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
dd0781e5 201 array.active_disks < array.raid_disks? ", degraded":"",
e5329c37 202 (!e || e->percent < 0) ? "" :
120230a4
NB
203 (e->resync) ? ", resyncing": ", recovering",
204 larray_size ? "": ", Not Started");
b83d95f3
NB
205 printf(" Active Devices : %d\n", array.active_disks);
206 printf("Working Devices : %d\n", array.working_disks);
207 printf(" Failed Devices : %d\n", array.failed_disks);
208 printf(" Spare Devices : %d\n", array.spare_disks);
cd29a5c8
NB
209 printf("\n");
210 if (array.level == 5) {
211 c = map_num(r5layout, array.layout);
212 printf(" Layout : %s\n", c?c:"-unknown-");
213 }
e5329c37 214 if (array.level == 10) {
b578481c
NB
215 printf(" Layout : near=%d, %s=%d\n",
216 array.layout&255, (array.layout&0x10000)?"offset":"far",
217 (array.layout>>8)&255);
e5329c37 218 }
cd29a5c8
NB
219 switch (array.level) {
220 case 0:
221 case 4:
222 case 5:
e5329c37
NB
223 case 10:
224 case 6:
225 printf(" Chunk Size : %dK\n\n", array.chunk_size/1024);
cd29a5c8
NB
226 break;
227 case -1:
e5329c37 228 printf(" Rounding : %dK\n\n", array.chunk_size/1024);
cd29a5c8
NB
229 break;
230 default: break;
231 }
82b27616 232
e5329c37 233 if (e && e->percent >= 0) {
bed256c2
NB
234 printf(" Re%s Status : %d%% complete\n",
235 (super && info.reshape_active)? "shape":"build",
236 e->percent);
e5329c37
NB
237 is_rebuilding = 1;
238 }
dd0781e5
NB
239 free_mdstat(ms);
240
bed256c2
NB
241 if (super && info.reshape_active) {
242#if 0
243This is pretty boring
244 printf(" Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9,
245 human_size(info.reshape_progress<<9));
246#endif
247 if (info.delta_disks > 0)
248 printf(" Delta Devices : %d, (%d->%d)\n",
249 info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks);
250 if (info.delta_disks < 0)
251 printf(" Delta Devices : %d, (%d->%d)\n",
252 info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks);
253 if (info.new_level != array.level) {
254 char *c = map_num(pers, info.new_level);
255 printf(" New Level : %s\n", c?c:"-unknown-");
256 }
257 if (info.new_level != array.level ||
258 info.new_layout != array.layout) {
259 if (info.new_level == 5) {
260 char *c = map_num(r5layout, info.new_layout);
261 printf(" New Layout : %s\n",
262 c?c:"-unknown-");
263 }
264 if (info.new_level == 10) {
b578481c 265 printf(" New Layout : near=%d, %s=%d\n",
bed256c2 266 info.new_layout&255,
b578481c 267 (info.new_layout&0x10000)?"offset":"far",
bed256c2
NB
268 (info.new_layout>>8)&255);
269 }
270 }
271 if (info.new_chunk != array.chunk_size)
272 printf(" New Chunksize : %dK\n", info.new_chunk/1024);
273 printf("\n");
274 } else if (e && e->percent >= 0)
275 printf("\n");
82d9eba6 276 if (super && st)
b6750aa8 277 st->ss->detail_super(super, homehost);
e5329c37 278
b83d95f3 279 printf(" Number Major Minor RaidDevice State\n");
cd29a5c8 280 }
b0c63f32
NB
281 disks = malloc(max_disks * sizeof(mdu_disk_info_t));
282 for (d=0; d<max_disks; d++) {
283 disks[d].state = (1<<MD_DISK_REMOVED);
284 disks[d].major = disks[d].minor = 0;
8352ab3e 285 disks[d].number = disks[d].raid_disk = d;
b0c63f32
NB
286 }
287
288 next = array.raid_disks;
289 for (d=0; d < max_disks; d++) {
64c4757e
NB
290 mdu_disk_info_t disk;
291 disk.number = d;
292 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
e0d19036 293 if (d < array.raid_disks)
b83d95f3 294 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
e0d19036 295 d, strerror(errno));
64c4757e
NB
296 continue;
297 }
67687afe
NB
298 if (disk.major == 0 && disk.minor == 0)
299 continue;
b0c63f32
NB
300 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
301 disks[disk.raid_disk] = disk;
302 else if (next < max_disks)
303 disks[next++] = disk;
304 }
305
a77be586 306 avail = calloc(array.raid_disks, 1);
b0c63f32
NB
307 for (d= 0; d < max_disks; d++) {
308 char *dv;
309 mdu_disk_info_t disk = disks[d];
310
e0d19036
NB
311 if (d >= array.raid_disks &&
312 disk.major == 0 &&
313 disk.minor == 0)
314 continue;
cd29a5c8 315 if (!brief) {
b0c63f32 316 if (d == array.raid_disks) printf("\n");
e5329c37
NB
317 if (disk.raid_disk < 0)
318 printf(" %5d %5d %5d - ",
319 disk.number, disk.major, disk.minor);
320 else
321 printf(" %5d %5d %5d %5d ",
322 disk.number, disk.major, disk.minor, disk.raid_disk);
323 if (disk.state & (1<<MD_DISK_FAULTY)) {
324 printf(" faulty");
325 if (disk.raid_disk < array.raid_disks &&
326 disk.raid_disk >= 0)
327 failed++;
328 }
cd29a5c8
NB
329 if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
330 if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
331 if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
b0c63f32
NB
332 if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
333 if ((disk.state &
334 ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
335 == 0) {
336 printf(" spare");
e5329c37
NB
337 if (is_26) {
338 if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
339 printf(" rebuilding");
340 } else if (is_rebuilding && failed) {
341 /* Taking a bit of a risk here, we remove the
342 * device from the array, and then put it back.
343 * If this fails, we are rebuilding
344 */
0df46c2a
NB
345 int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
346 if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
e5329c37
NB
347 if (err && errno == EBUSY)
348 printf(" rebuilding");
349 }
350 }
feb716e9 351 }
e5329c37 352 if (disk.state == 0) spares++;
a77be586
NB
353 if (test && d < array.raid_disks
354 && !(disk.state & (1<<MD_DISK_SYNC)))
feb716e9 355 rv |= 1;
a77be586
NB
356 if (d < array.raid_disks
357 && (disk.state & (1<<MD_DISK_SYNC))) {
358 avail_disks ++;
359 avail[d] = 1;
cd29a5c8 360 }
16c6fa80 361 if ((dv=map_dev(disk.major, disk.minor, 0))) {
d013a55e
NB
362 if (brief) {
363 if (devices) {
364 devices = realloc(devices,
365 strlen(devices)+1+strlen(dv)+1);
366 strcat(strcat(devices,","),dv);
367 } else
368 devices = strdup(dv);
369 } else
370 printf(" %s", dv);
82b27616 371 }
cd29a5c8 372 if (!brief) printf("\n");
64c4757e 373 }
feb716e9 374 if (spares && brief) printf(" spares=%d", spares);
82d9eba6
NB
375 if (super && brief && st)
376 st->ss->brief_detail_super(super);
4b1ac34b 377
22892d56 378 if (brief > 1 && devices) printf("\n devices=%s", devices);
cd29a5c8 379 if (brief) printf("\n");
54bad364 380out:
a77be586
NB
381 if (test &&
382 !enough(array.level, array.raid_disks, array.layout,
383 1, avail, avail_disks))
384 rv = 2;
385
e5329c37 386 close(fd);
feb716e9 387 return rv;
64c4757e 388}