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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 | mdu_disk_info_t *disks; | |
45 | int next; | |
46 | int d; | |
47 | time_t atime; | |
48 | char *c; | |
49 | char *devices = NULL; | |
50 | int spares = 0; | |
51 | struct stat stb; | |
52 | int is_26 = get_linux_version() >= 2006000; | |
53 | int is_rebuilding = 0; | |
54 | int failed = 0; | |
55 | struct supertype *st = NULL; | |
56 | int max_disks = MD_SB_DISKS; /* just a default */ | |
57 | struct mdinfo info; | |
58 | ||
59 | void *super = NULL; | |
60 | int rv = test ? 4 : 1; | |
61 | ||
62 | if (fd < 0) { | |
63 | fprintf(stderr, Name ": cannot open %s: %s\n", | |
64 | dev, strerror(errno)); | |
65 | return rv; | |
66 | } | |
67 | vers = md_get_version(fd); | |
68 | if (vers < 0) { | |
69 | fprintf(stderr, Name ": %s does not appear to be an md device\n", | |
70 | dev); | |
71 | close(fd); | |
72 | return rv; | |
73 | } | |
74 | if (vers < 9000) { | |
75 | fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n", | |
76 | dev); | |
77 | close(fd); | |
78 | return rv; | |
79 | } | |
80 | if (ioctl(fd, GET_ARRAY_INFO, &array)<0) { | |
81 | if (errno == ENODEV) | |
82 | fprintf(stderr, Name ": md device %s does not appear to be active.\n", | |
83 | dev); | |
84 | else | |
85 | fprintf(stderr, Name ": cannot get array detail for %s: %s\n", | |
86 | dev, strerror(errno)); | |
87 | close(fd); | |
88 | return rv; | |
89 | } | |
90 | st = super_by_version(array.major_version, array.minor_version); | |
91 | ||
92 | if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode)) | |
93 | stb.st_rdev = 0; | |
94 | rv = 0; | |
95 | ||
96 | if (st) max_disks = st->max_devs; | |
97 | ||
98 | /* try to load a superblock */ | |
99 | for (d= 0; d<max_disks; d++) { | |
100 | mdu_disk_info_t disk; | |
101 | char *dv; | |
102 | disk.number = d; | |
103 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
104 | continue; | |
105 | if (d >= array.raid_disks && | |
106 | disk.major == 0 && | |
107 | disk.minor == 0) | |
108 | continue; | |
109 | if ((dv=map_dev(disk.major, disk.minor, 1))) { | |
110 | if (!super && (disk.state & (1<<MD_DISK_ACTIVE))) { | |
111 | /* try to read the superblock from this device | |
112 | * to get more info | |
113 | */ | |
114 | int fd2 = dev_open(dv, O_RDONLY); | |
115 | if (fd2 >=0 && st && | |
116 | st->ss->load_super(st, fd2, &super, NULL) == 0) { | |
117 | st->ss->getinfo_super(&info, super); | |
118 | if (info.array.ctime != array.ctime || | |
119 | info.array.level != array.level) { | |
120 | free(super); | |
121 | super = NULL; | |
122 | } | |
123 | } | |
124 | if (fd2 >= 0) close(fd2); | |
125 | } | |
126 | } | |
127 | } | |
128 | ||
129 | /* Ok, we have some info to print... */ | |
130 | c = map_num(pers, array.level); | |
131 | if (brief) | |
132 | printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks ); | |
133 | else { | |
134 | mdu_bitmap_file_t bmf; | |
135 | unsigned long array_size; | |
136 | unsigned long long larray_size; | |
137 | struct mdstat_ent *ms = mdstat_read(0, 0); | |
138 | struct mdstat_ent *e; | |
139 | int devnum = array.md_minor; | |
140 | if (major(stb.st_rdev) != MD_MAJOR) | |
141 | devnum = -1 - devnum; | |
142 | ||
143 | for (e=ms; e; e=e->next) | |
144 | if (e->devnum == devnum) | |
145 | break; | |
146 | #ifdef BLKGETSIZE64 | |
147 | if (ioctl(fd, BLKGETSIZE64, &larray_size)==0) | |
148 | ; | |
149 | else | |
150 | #endif | |
151 | if (ioctl(fd, BLKGETSIZE, &array_size)==0) { | |
152 | larray_size = array_size; | |
153 | larray_size <<= 9; | |
154 | } | |
155 | ||
156 | else larray_size = 0; | |
157 | ||
158 | printf("%s:\n", dev); | |
159 | printf(" Version : %02d.%02d.%02d\n", | |
160 | array.major_version, array.minor_version, array.patch_version); | |
161 | atime = array.ctime; | |
162 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
163 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
164 | if (larray_size) | |
165 | printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size)); | |
166 | if (array.level >= 1) { | |
167 | if (array.major_version != 0 && | |
168 | (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) { | |
169 | unsigned long long dsize = get_component_size(fd); | |
170 | if (dsize > 0) | |
171 | printf(" Device Size : %llu%s\n", dsize, human_size((long long)array.size<<10)); | |
172 | else | |
173 | printf(" Device Size : unknown\n"); | |
174 | } else | |
175 | printf(" Device Size : %d%s\n", array.size, human_size((long long)array.size<<10)); | |
176 | } | |
177 | printf(" Raid Devices : %d\n", array.raid_disks); | |
178 | printf(" Total Devices : %d\n", array.nr_disks); | |
179 | printf("Preferred Minor : %d\n", array.md_minor); | |
180 | printf(" Persistence : Superblock is %spersistent\n", | |
181 | array.not_persistent?"not ":""); | |
182 | printf("\n"); | |
183 | /* Only try GET_BITMAP_FILE for 0.90.01 and later */ | |
184 | if (vers >= 9001 && | |
185 | ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 && | |
186 | bmf.pathname[0]) { | |
187 | printf(" Intent Bitmap : %s\n", bmf.pathname); | |
188 | printf("\n"); | |
189 | } else if (array.state & (1<<MD_SB_BITMAP_PRESENT)) | |
190 | printf(" Intent Bitmap : Internal\n\n"); | |
191 | atime = array.utime; | |
192 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
193 | printf(" State : %s%s%s\n", | |
194 | (array.state&(1<<MD_SB_CLEAN))?"clean":"active", | |
195 | array.active_disks < array.raid_disks? ", degraded":"", | |
196 | (!e || e->percent < 0) ? "" : | |
197 | (e->resync) ? ", resyncing": ", recovering"); | |
198 | printf(" Active Devices : %d\n", array.active_disks); | |
199 | printf("Working Devices : %d\n", array.working_disks); | |
200 | printf(" Failed Devices : %d\n", array.failed_disks); | |
201 | printf(" Spare Devices : %d\n", array.spare_disks); | |
202 | printf("\n"); | |
203 | if (array.level == 5) { | |
204 | c = map_num(r5layout, array.layout); | |
205 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
206 | } | |
207 | if (array.level == 10) { | |
208 | printf(" Layout : near=%d, %s=%d\n", | |
209 | array.layout&255, (array.layout&0x10000)?"offset":"far", | |
210 | (array.layout>>8)&255); | |
211 | } | |
212 | switch (array.level) { | |
213 | case 0: | |
214 | case 4: | |
215 | case 5: | |
216 | case 10: | |
217 | case 6: | |
218 | printf(" Chunk Size : %dK\n\n", array.chunk_size/1024); | |
219 | break; | |
220 | case -1: | |
221 | printf(" Rounding : %dK\n\n", array.chunk_size/1024); | |
222 | break; | |
223 | default: break; | |
224 | } | |
225 | ||
226 | if (e && e->percent >= 0) { | |
227 | printf(" Re%s Status : %d%% complete\n", | |
228 | (super && info.reshape_active)? "shape":"build", | |
229 | e->percent); | |
230 | is_rebuilding = 1; | |
231 | } | |
232 | free_mdstat(ms); | |
233 | ||
234 | if (super && info.reshape_active) { | |
235 | #if 0 | |
236 | This is pretty boring | |
237 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9, | |
238 | human_size(info.reshape_progress<<9)); | |
239 | #endif | |
240 | if (info.delta_disks > 0) | |
241 | printf(" Delta Devices : %d, (%d->%d)\n", | |
242 | info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks); | |
243 | if (info.delta_disks < 0) | |
244 | printf(" Delta Devices : %d, (%d->%d)\n", | |
245 | info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks); | |
246 | if (info.new_level != array.level) { | |
247 | char *c = map_num(pers, info.new_level); | |
248 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
249 | } | |
250 | if (info.new_level != array.level || | |
251 | info.new_layout != array.layout) { | |
252 | if (info.new_level == 5) { | |
253 | char *c = map_num(r5layout, info.new_layout); | |
254 | printf(" New Layout : %s\n", | |
255 | c?c:"-unknown-"); | |
256 | } | |
257 | if (info.new_level == 10) { | |
258 | printf(" New Layout : near=%d, %s=%d\n", | |
259 | info.new_layout&255, | |
260 | (info.new_layout&0x10000)?"offset":"far", | |
261 | (info.new_layout>>8)&255); | |
262 | } | |
263 | } | |
264 | if (info.new_chunk != array.chunk_size) | |
265 | printf(" New Chunksize : %dK\n", info.new_chunk/1024); | |
266 | printf("\n"); | |
267 | } else if (e && e->percent >= 0) | |
268 | printf("\n"); | |
269 | if (super && st) | |
270 | st->ss->detail_super(super); | |
271 | ||
272 | printf(" Number Major Minor RaidDevice State\n"); | |
273 | } | |
274 | disks = malloc(max_disks * sizeof(mdu_disk_info_t)); | |
275 | for (d=0; d<max_disks; d++) { | |
276 | disks[d].state = (1<<MD_DISK_REMOVED); | |
277 | disks[d].major = disks[d].minor = 0; | |
278 | disks[d].number = disks[d].raid_disk = d; | |
279 | } | |
280 | ||
281 | next = array.raid_disks; | |
282 | for (d=0; d < max_disks; d++) { | |
283 | mdu_disk_info_t disk; | |
284 | disk.number = d; | |
285 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) { | |
286 | if (d < array.raid_disks) | |
287 | fprintf(stderr, Name ": cannot get device detail for device %d: %s\n", | |
288 | d, strerror(errno)); | |
289 | continue; | |
290 | } | |
291 | if (disk.major == 0 && disk.minor == 0) | |
292 | continue; | |
293 | if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks) | |
294 | disks[disk.raid_disk] = disk; | |
295 | else if (next < max_disks) | |
296 | disks[next++] = disk; | |
297 | } | |
298 | ||
299 | for (d= 0; d < max_disks; d++) { | |
300 | char *dv; | |
301 | mdu_disk_info_t disk = disks[d]; | |
302 | ||
303 | if (d >= array.raid_disks && | |
304 | disk.major == 0 && | |
305 | disk.minor == 0) | |
306 | continue; | |
307 | if (!brief) { | |
308 | if (d == array.raid_disks) printf("\n"); | |
309 | if (disk.raid_disk < 0) | |
310 | printf(" %5d %5d %5d - ", | |
311 | disk.number, disk.major, disk.minor); | |
312 | else | |
313 | printf(" %5d %5d %5d %5d ", | |
314 | disk.number, disk.major, disk.minor, disk.raid_disk); | |
315 | if (disk.state & (1<<MD_DISK_FAULTY)) { | |
316 | printf(" faulty"); | |
317 | if (disk.raid_disk < array.raid_disks && | |
318 | disk.raid_disk >= 0) | |
319 | failed++; | |
320 | } | |
321 | if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active"); | |
322 | if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync"); | |
323 | if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed"); | |
324 | if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly"); | |
325 | if ((disk.state & | |
326 | ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED))) | |
327 | == 0) { | |
328 | printf(" spare"); | |
329 | if (is_26) { | |
330 | if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0) | |
331 | printf(" rebuilding"); | |
332 | } else if (is_rebuilding && failed) { | |
333 | /* Taking a bit of a risk here, we remove the | |
334 | * device from the array, and then put it back. | |
335 | * If this fails, we are rebuilding | |
336 | */ | |
337 | int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor)); | |
338 | if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor)); | |
339 | if (err && errno == EBUSY) | |
340 | printf(" rebuilding"); | |
341 | } | |
342 | } | |
343 | } | |
344 | if (disk.state == 0) spares++; | |
345 | if (test && d < array.raid_disks && disk.state & (1<<MD_DISK_FAULTY)) { | |
346 | if ((rv & 1) && (array.level ==4 || array.level == 5)) | |
347 | rv |= 2; | |
348 | rv |= 1; | |
349 | } | |
350 | if ((dv=map_dev(disk.major, disk.minor, 0))) { | |
351 | if (brief) { | |
352 | if (devices) { | |
353 | devices = realloc(devices, | |
354 | strlen(devices)+1+strlen(dv)+1); | |
355 | strcat(strcat(devices,","),dv); | |
356 | } else | |
357 | devices = strdup(dv); | |
358 | } else | |
359 | printf(" %s", dv); | |
360 | } | |
361 | if (!brief) printf("\n"); | |
362 | } | |
363 | if (spares && brief) printf(" spares=%d", spares); | |
364 | if (super && brief && st) | |
365 | st->ss->brief_detail_super(super); | |
366 | ||
367 | if (brief > 1 && devices) printf("\n devices=%s", devices); | |
368 | if (brief) printf("\n"); | |
369 | if (test && (rv&2)) rv &= ~1; | |
370 | close(fd); | |
371 | return rv; | |
372 | } |