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Commit | Line | Data |
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4b1ac34b NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
e736b623 | 4 | * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de> |
4b1ac34b 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 | |
e736b623 | 22 | * Email: <neilb@suse.de> |
4b1ac34b NB |
23 | */ |
24 | ||
8268ed74 | 25 | #define HAVE_STDINT_H 1 |
4b1ac34b | 26 | #include "mdadm.h" |
8268ed74 | 27 | #include "sha1.h" |
4b1ac34b NB |
28 | /* |
29 | * All handling for the 0.90.0 version superblock is in | |
30 | * this file. | |
31 | * This includes: | |
32 | * - finding, loading, and writing the superblock. | |
33 | * - initialising a new superblock | |
34 | * - printing the superblock for --examine | |
35 | * - printing part of the superblock for --detail | |
aba69144 | 36 | * .. other stuff |
4b1ac34b NB |
37 | */ |
38 | ||
4b1ac34b NB |
39 | static unsigned long calc_sb0_csum(mdp_super_t *super) |
40 | { | |
41 | unsigned long csum = super->sb_csum; | |
42 | unsigned long newcsum; | |
43 | super->sb_csum= 0 ; | |
44 | newcsum = calc_csum(super, MD_SB_BYTES); | |
45 | super->sb_csum = csum; | |
46 | return newcsum; | |
47 | } | |
48 | ||
ec9688ca | 49 | static void super0_swap_endian(struct mdp_superblock_s *sb) |
586ed405 NB |
50 | { |
51 | /* as super0 superblocks are host-endian, it is sometimes | |
aba69144 | 52 | * useful to be able to swap the endianness |
586ed405 NB |
53 | * as (almost) everything is u32's we byte-swap every 4byte |
54 | * number. | |
55 | * We then also have to swap the events_hi and events_lo | |
56 | */ | |
57 | char *sbc = (char *)sb; | |
58 | __u32 t32; | |
59 | int i; | |
60 | ||
61 | for (i=0; i < MD_SB_BYTES ; i+=4) { | |
62 | char t = sbc[i]; | |
63 | sbc[i] = sbc[i+3]; | |
64 | sbc[i+3] = t; | |
65 | t=sbc[i+1]; | |
66 | sbc[i+1]=sbc[i+2]; | |
67 | sbc[i+2]=t; | |
68 | } | |
69 | t32 = sb->events_hi; | |
70 | sb->events_hi = sb->events_lo; | |
71 | sb->events_lo = t32; | |
72 | ||
73 | t32 = sb->cp_events_hi; | |
74 | sb->cp_events_hi = sb->cp_events_lo; | |
75 | sb->cp_events_lo = t32; | |
76 | ||
353632d9 | 77 | } |
586ed405 | 78 | |
3da92f27 | 79 | static void examine_super0(struct supertype *st, char *homehost) |
4b1ac34b | 80 | { |
3da92f27 | 81 | mdp_super_t *sb = st->sb; |
4b1ac34b NB |
82 | time_t atime; |
83 | int d; | |
4180aa4d | 84 | int delta_extra = 0; |
4b1ac34b NB |
85 | char *c; |
86 | ||
87 | printf(" Magic : %08x\n", sb->md_magic); | |
00fab745 JS |
88 | printf(" Version : %d.%02d.%02d\n", |
89 | sb->major_version, sb->minor_version, sb->patch_version); | |
a1cbd7d0 | 90 | if (sb->minor_version >= 90) { |
00fab745 JS |
91 | printf(" UUID : %08x:%08x:%08x:%08x", sb->set_uuid0, |
92 | sb->set_uuid1, sb->set_uuid2, sb->set_uuid3); | |
a1cbd7d0 | 93 | if (homehost) { |
8268ed74 | 94 | char buf[20]; |
00fab745 JS |
95 | void *hash; |
96 | ||
97 | hash = sha1_buffer(homehost, strlen(homehost), buf); | |
98 | if (memcmp(&sb->set_uuid2, hash, 8) == 0) | |
a1cbd7d0 NB |
99 | printf(" (local to host %s)", homehost); |
100 | } | |
101 | printf("\n"); | |
102 | } else | |
4b1ac34b NB |
103 | printf(" UUID : %08x\n", sb->set_uuid0); |
104 | ||
8382f19b NB |
105 | if (sb->not_persistent) |
106 | printf(" Eedk : not persistent\n"); | |
107 | ||
4b1ac34b NB |
108 | atime = sb->ctime; |
109 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
00fab745 | 110 | c = map_num(pers, sb->level); |
4b1ac34b | 111 | printf(" Raid Level : %s\n", c?c:"-unknown-"); |
c43f7d91 | 112 | if ((int)sb->level > 0) { |
d4633e06 | 113 | int ddsks = 0, ddsks_denom = 1; |
e3362544 NB |
114 | printf(" Used Dev Size : %d%s\n", sb->size, |
115 | human_size((long long)sb->size<<10)); | |
b674b5b8 | 116 | switch(sb->level) { |
00fab745 JS |
117 | case 1: |
118 | ddsks=1; | |
119 | break; | |
b674b5b8 | 120 | case 4: |
00fab745 JS |
121 | case 5: |
122 | ddsks = sb->raid_disks - 1; | |
123 | break; | |
124 | case 6: | |
125 | ddsks = sb->raid_disks - 2; | |
126 | break; | |
127 | case 10: | |
128 | ddsks = sb->raid_disks; | |
129 | ddsks_denom = | |
130 | (sb->layout & 255) * ((sb->layout >> 8) & 255); | |
d4633e06 N |
131 | } |
132 | if (ddsks) { | |
133 | long long asize = sb->size; | |
134 | asize = (asize << 10) * ddsks / ddsks_denom; | |
135 | printf(" Array Size : %llu%s\n", | |
136 | asize >> 10, human_size(asize)); | |
b674b5b8 | 137 | } |
b674b5b8 | 138 | } |
4b1ac34b NB |
139 | printf(" Raid Devices : %d\n", sb->raid_disks); |
140 | printf(" Total Devices : %d\n", sb->nr_disks); | |
141 | printf("Preferred Minor : %d\n", sb->md_minor); | |
142 | printf("\n"); | |
00fab745 JS |
143 | if (sb->minor_version > 90 && (sb->reshape_position + 1) != 0) { |
144 | printf(" Reshape pos'n : %llu%s\n", | |
145 | (unsigned long long)sb->reshape_position / 2, | |
146 | human_size((long long)sb->reshape_position << 9)); | |
b674b5b8 NB |
147 | if (sb->delta_disks) { |
148 | printf(" Delta Devices : %d", sb->delta_disks); | |
00fab745 JS |
149 | printf(" (%d->%d)\n", sb->raid_disks-sb->delta_disks, |
150 | sb->raid_disks); | |
4180aa4d N |
151 | if (((int)sb->delta_disks) < 0) |
152 | delta_extra = - sb->delta_disks; | |
b674b5b8 NB |
153 | } |
154 | if (sb->new_level != sb->level) { | |
155 | c = map_num(pers, sb->new_level); | |
156 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
157 | } | |
158 | if (sb->new_layout != sb->layout) { | |
159 | if (sb->level == 5) { | |
160 | c = map_num(r5layout, sb->new_layout); | |
00fab745 JS |
161 | printf(" New Layout : %s\n", |
162 | c?c:"-unknown-"); | |
b674b5b8 | 163 | } |
fe77a154 N |
164 | if (sb->level == 6) { |
165 | c = map_num(r6layout, sb->new_layout); | |
00fab745 JS |
166 | printf(" New Layout : %s\n", |
167 | c?c:"-unknown-"); | |
fe77a154 | 168 | } |
b674b5b8 | 169 | if (sb->level == 10) { |
b578481c NB |
170 | printf(" New Layout : near=%d, %s=%d\n", |
171 | sb->new_layout&255, | |
172 | (sb->new_layout&0x10000)?"offset":"far", | |
173 | (sb->new_layout>>8)&255); | |
b674b5b8 NB |
174 | } |
175 | } | |
176 | if (sb->new_chunk != sb->chunk_size) | |
177 | printf(" New Chunksize : %d\n", sb->new_chunk); | |
178 | printf("\n"); | |
179 | } | |
4b1ac34b NB |
180 | atime = sb->utime; |
181 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
182 | printf(" State : %s\n", | |
00fab745 JS |
183 | (sb->state&(1 << MD_SB_CLEAN)) ? "clean":"active"); |
184 | if (sb->state & (1 << MD_SB_BITMAP_PRESENT)) | |
55935d51 | 185 | printf("Internal Bitmap : present\n"); |
4b1ac34b NB |
186 | printf(" Active Devices : %d\n", sb->active_disks); |
187 | printf("Working Devices : %d\n", sb->working_disks); | |
188 | printf(" Failed Devices : %d\n", sb->failed_disks); | |
189 | printf(" Spare Devices : %d\n", sb->spare_disks); | |
190 | if (calc_sb0_csum(sb) == sb->sb_csum) | |
191 | printf(" Checksum : %x - correct\n", sb->sb_csum); | |
192 | else | |
00fab745 JS |
193 | printf(" Checksum : %x - expected %lx\n", |
194 | sb->sb_csum, calc_sb0_csum(sb)); | |
1486e43f | 195 | printf(" Events : %llu\n", |
00fab745 | 196 | ((unsigned long long)sb->events_hi << 32) + sb->events_lo); |
4b1ac34b NB |
197 | printf("\n"); |
198 | if (sb->level == 5) { | |
199 | c = map_num(r5layout, sb->layout); | |
200 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
201 | } | |
fe77a154 N |
202 | if (sb->level == 6) { |
203 | c = map_num(r6layout, sb->layout); | |
204 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
205 | } | |
265e0f17 | 206 | if (sb->level == 10) { |
e4965ef8 N |
207 | printf(" Layout :"); |
208 | print_r10_layout(sb->layout); | |
209 | printf("\n"); | |
265e0f17 | 210 | } |
4b1ac34b NB |
211 | switch(sb->level) { |
212 | case 0: | |
213 | case 4: | |
214 | case 5: | |
2c102711 NB |
215 | case 6: |
216 | case 10: | |
00fab745 | 217 | printf(" Chunk Size : %dK\n", sb->chunk_size / 1024); |
4b1ac34b NB |
218 | break; |
219 | case -1: | |
00fab745 JS |
220 | printf(" Rounding : %dK\n", sb->chunk_size / 1024); |
221 | break; | |
222 | default: | |
4b1ac34b | 223 | break; |
4b1ac34b NB |
224 | } |
225 | printf("\n"); | |
226 | printf(" Number Major Minor RaidDevice State\n"); | |
00fab745 JS |
227 | for (d = -1; |
228 | d < (signed int)(sb->raid_disks + delta_extra + sb->spare_disks); | |
229 | d++) { | |
4b1ac34b NB |
230 | mdp_disk_t *dp; |
231 | char *dv; | |
ff9239ee | 232 | char nb[11]; |
71574efb | 233 | int wonly, failfast; |
4b1ac34b NB |
234 | if (d>=0) dp = &sb->disks[d]; |
235 | else dp = &sb->this_disk; | |
8f23b0b3 | 236 | snprintf(nb, sizeof(nb), "%4d", d); |
00fab745 | 237 | printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb, |
4b1ac34b | 238 | dp->number, dp->major, dp->minor, dp->raid_disk); |
00fab745 | 239 | wonly = dp->state & (1 << MD_DISK_WRITEMOSTLY); |
71574efb N |
240 | failfast = dp->state & (1<<MD_DISK_FAILFAST); |
241 | dp->state &= ~(wonly | failfast); | |
00fab745 JS |
242 | if (dp->state & (1 << MD_DISK_FAULTY)) |
243 | printf(" faulty"); | |
244 | if (dp->state & (1 << MD_DISK_ACTIVE)) | |
245 | printf(" active"); | |
246 | if (dp->state & (1 << MD_DISK_SYNC)) | |
247 | printf(" sync"); | |
248 | if (dp->state & (1 << MD_DISK_REMOVED)) | |
249 | printf(" removed"); | |
250 | if (wonly) | |
251 | printf(" write-mostly"); | |
71574efb N |
252 | if (failfast) |
253 | printf(" failfast"); | |
00fab745 JS |
254 | if (dp->state == 0) |
255 | printf(" spare"); | |
256 | if ((dv = map_dev(dp->major, dp->minor, 0))) | |
4b1ac34b NB |
257 | printf(" %s", dv); |
258 | printf("\n"); | |
00fab745 JS |
259 | if (d == -1) |
260 | printf("\n"); | |
4b1ac34b NB |
261 | } |
262 | } | |
263 | ||
061f2c6a | 264 | static void brief_examine_super0(struct supertype *st, int verbose) |
4b1ac34b | 265 | { |
3da92f27 | 266 | mdp_super_t *sb = st->sb; |
4b1ac34b | 267 | char *c=map_num(pers, sb->level); |
2998bc01 | 268 | char devname[20]; |
2998bc01 NB |
269 | |
270 | sprintf(devname, "/dev/md%d", sb->md_minor); | |
4b1ac34b | 271 | |
061f2c6a N |
272 | if (verbose) { |
273 | printf("ARRAY %s level=%s num-devices=%d", | |
274 | devname, | |
275 | c?c:"-unknown-", sb->raid_disks); | |
276 | } else | |
277 | printf("ARRAY %s", devname); | |
278 | ||
4b1ac34b | 279 | if (sb->minor_version >= 90) |
061f2c6a | 280 | printf(" UUID=%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, |
4b1ac34b NB |
281 | sb->set_uuid2, sb->set_uuid3); |
282 | else | |
061f2c6a | 283 | printf(" UUID=%08x", sb->set_uuid0); |
4b1ac34b NB |
284 | printf("\n"); |
285 | } | |
286 | ||
0d726f17 KS |
287 | static void export_examine_super0(struct supertype *st) |
288 | { | |
289 | mdp_super_t *sb = st->sb; | |
290 | ||
291 | printf("MD_LEVEL=%s\n", map_num(pers, sb->level)); | |
292 | printf("MD_DEVICES=%d\n", sb->raid_disks); | |
293 | if (sb->minor_version >= 90) | |
294 | printf("MD_UUID=%08x:%08x:%08x:%08x\n", | |
295 | sb->set_uuid0, sb->set_uuid1, | |
296 | sb->set_uuid2, sb->set_uuid3); | |
297 | else | |
298 | printf("MD_UUID=%08x\n", sb->set_uuid0); | |
299 | printf("MD_UPDATE_TIME=%llu\n", | |
300 | __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL); | |
301 | printf("MD_EVENTS=%llu\n", | |
302 | ((unsigned long long)sb->events_hi << 32) | |
303 | + sb->events_lo); | |
304 | } | |
305 | ||
74db60b0 N |
306 | static int copy_metadata0(struct supertype *st, int from, int to) |
307 | { | |
308 | /* Read 64K from the appropriate offset of 'from' | |
309 | * and if it looks a little like a 0.90 superblock, | |
310 | * write it to the same offset of 'to' | |
311 | */ | |
312 | void *buf; | |
313 | unsigned long long dsize, offset; | |
314 | const int bufsize = 64*1024; | |
315 | mdp_super_t *super; | |
316 | ||
317 | if (posix_memalign(&buf, 4096, bufsize) != 0) | |
318 | return 1; | |
319 | ||
320 | if (!get_dev_size(from, NULL, &dsize)) | |
321 | goto err; | |
322 | ||
323 | if (dsize < MD_RESERVED_SECTORS*512) | |
324 | goto err; | |
325 | ||
326 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); | |
327 | ||
328 | offset *= 512; | |
329 | ||
330 | if (lseek64(from, offset, 0) < 0LL) | |
331 | goto err; | |
332 | if (read(from, buf, bufsize) != bufsize) | |
333 | goto err; | |
334 | ||
335 | if (lseek64(to, offset, 0) < 0LL) | |
336 | goto err; | |
337 | super = buf; | |
338 | if (super->md_magic != MD_SB_MAGIC || | |
339 | super->major_version != 0 || | |
340 | calc_sb0_csum(super) != super->sb_csum) | |
341 | goto err; | |
342 | if (write(to, buf, bufsize) != bufsize) | |
343 | goto err; | |
344 | free(buf); | |
345 | return 0; | |
346 | err: | |
347 | free(buf); | |
348 | return 1; | |
349 | } | |
350 | ||
3da92f27 | 351 | static void detail_super0(struct supertype *st, char *homehost) |
4b1ac34b | 352 | { |
3da92f27 | 353 | mdp_super_t *sb = st->sb; |
65884368 | 354 | printf(" UUID : "); |
4b1ac34b NB |
355 | if (sb->minor_version >= 90) |
356 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
357 | sb->set_uuid2, sb->set_uuid3); | |
358 | else | |
359 | printf("%08x", sb->set_uuid0); | |
b6750aa8 | 360 | if (homehost) { |
8268ed74 NB |
361 | char buf[20]; |
362 | void *hash = sha1_buffer(homehost, | |
363 | strlen(homehost), | |
364 | buf); | |
b6750aa8 NB |
365 | if (memcmp(&sb->set_uuid2, hash, 8)==0) |
366 | printf(" (local to host %s)", homehost); | |
367 | } | |
65884368 | 368 | printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo); |
4b1ac34b NB |
369 | } |
370 | ||
3da92f27 | 371 | static void brief_detail_super0(struct supertype *st) |
4b1ac34b | 372 | { |
3da92f27 | 373 | mdp_super_t *sb = st->sb; |
4b1ac34b NB |
374 | printf(" UUID="); |
375 | if (sb->minor_version >= 90) | |
376 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
377 | sb->set_uuid2, sb->set_uuid3); | |
378 | else | |
379 | printf("%08x", sb->set_uuid0); | |
380 | } | |
83b6208e | 381 | |
3da92f27 | 382 | static int match_home0(struct supertype *st, char *homehost) |
83b6208e | 383 | { |
3da92f27 | 384 | mdp_super_t *sb = st->sb; |
8268ed74 | 385 | char buf[20]; |
40d28f0d N |
386 | char *hash; |
387 | ||
388 | if (!homehost) | |
389 | return 0; | |
390 | hash = sha1_buffer(homehost, | |
391 | strlen(homehost), | |
392 | buf); | |
83b6208e NB |
393 | |
394 | return (memcmp(&sb->set_uuid2, hash, 8)==0); | |
395 | } | |
396 | ||
3da92f27 | 397 | static void uuid_from_super0(struct supertype *st, int uuid[4]) |
4b1ac34b | 398 | { |
3da92f27 | 399 | mdp_super_t *super = st->sb; |
4b1ac34b NB |
400 | uuid[0] = super->set_uuid0; |
401 | if (super->minor_version >= 90) { | |
402 | uuid[1] = super->set_uuid1; | |
403 | uuid[2] = super->set_uuid2; | |
404 | uuid[3] = super->set_uuid3; | |
405 | } else { | |
406 | uuid[1] = 0; | |
407 | uuid[2] = 0; | |
408 | uuid[3] = 0; | |
409 | } | |
410 | } | |
411 | ||
a5d85af7 | 412 | static void getinfo_super0(struct supertype *st, struct mdinfo *info, char *map) |
4b1ac34b | 413 | { |
3da92f27 | 414 | mdp_super_t *sb = st->sb; |
4b1ac34b NB |
415 | int working = 0; |
416 | int i; | |
a5d85af7 | 417 | int map_disks = info->array.raid_disks; |
4b1ac34b | 418 | |
95eeceeb | 419 | memset(info, 0, sizeof(*info)); |
4b1ac34b NB |
420 | info->array.major_version = sb->major_version; |
421 | info->array.minor_version = sb->minor_version; | |
422 | info->array.patch_version = sb->patch_version; | |
423 | info->array.raid_disks = sb->raid_disks; | |
424 | info->array.level = sb->level; | |
265e0f17 | 425 | info->array.layout = sb->layout; |
4b1ac34b NB |
426 | info->array.md_minor = sb->md_minor; |
427 | info->array.ctime = sb->ctime; | |
353632d9 NB |
428 | info->array.utime = sb->utime; |
429 | info->array.chunk_size = sb->chunk_size; | |
583315d9 | 430 | info->array.state = sb->state; |
9f7f28ee N |
431 | info->component_size = sb->size; |
432 | info->component_size *= 2; | |
4b1ac34b | 433 | |
c0c1acd6 N |
434 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) |
435 | info->bitmap_offset = 8; | |
436 | ||
4b1ac34b NB |
437 | info->disk.state = sb->this_disk.state; |
438 | info->disk.major = sb->this_disk.major; | |
439 | info->disk.minor = sb->this_disk.minor; | |
440 | info->disk.raid_disk = sb->this_disk.raid_disk; | |
fbf8a0b7 | 441 | info->disk.number = sb->this_disk.number; |
4b1ac34b NB |
442 | |
443 | info->events = md_event(sb); | |
353632d9 | 444 | info->data_offset = 0; |
4b1ac34b | 445 | |
1522c538 | 446 | sprintf(info->text_version, "0.%d", sb->minor_version); |
a67dd8cc | 447 | info->safe_mode_delay = 200; |
1522c538 | 448 | |
3da92f27 | 449 | uuid_from_super0(st, info->uuid); |
947fd4dd | 450 | |
921d9e16 | 451 | info->recovery_start = MaxSector; |
353632d9 NB |
452 | if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) { |
453 | info->reshape_active = 1; | |
454 | info->reshape_progress = sb->reshape_position; | |
455 | info->new_level = sb->new_level; | |
456 | info->delta_disks = sb->delta_disks; | |
457 | info->new_layout = sb->new_layout; | |
458 | info->new_chunk = sb->new_chunk; | |
4180aa4d N |
459 | if (info->delta_disks < 0) |
460 | info->array.raid_disks -= info->delta_disks; | |
353632d9 NB |
461 | } else |
462 | info->reshape_active = 0; | |
463 | ||
6e75048b AK |
464 | info->recovery_blocked = info->reshape_active; |
465 | ||
8a46fe84 | 466 | sprintf(info->name, "%d", sb->md_minor); |
4b1ac34b NB |
467 | /* work_disks is calculated rather than read directly */ |
468 | for (i=0; i < MD_SB_DISKS; i++) | |
469 | if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) && | |
f21e18ca | 470 | (sb->disks[i].raid_disk < (unsigned)info->array.raid_disks) && |
4b1ac34b | 471 | (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) && |
a5d85af7 | 472 | !(sb->disks[i].state & (1<<MD_DISK_FAULTY))) { |
4b1ac34b | 473 | working ++; |
a5d85af7 N |
474 | if (map && i < map_disks) |
475 | map[i] = 1; | |
476 | } else if (map && i < map_disks) | |
477 | map[i] = 0; | |
4b1ac34b NB |
478 | info->array.working_disks = working; |
479 | } | |
480 | ||
00bbdbda N |
481 | static struct mdinfo *container_content0(struct supertype *st, char *subarray) |
482 | { | |
483 | struct mdinfo *info; | |
484 | ||
485 | if (subarray) | |
486 | return NULL; | |
487 | ||
503975b9 | 488 | info = xmalloc(sizeof(*info)); |
00bbdbda N |
489 | getinfo_super0(st, info, NULL); |
490 | return info; | |
491 | } | |
4b1ac34b | 492 | |
68c7d6d7 | 493 | static int update_super0(struct supertype *st, struct mdinfo *info, |
3da92f27 | 494 | char *update, |
e5eac01f NB |
495 | char *devname, int verbose, |
496 | int uuid_set, char *homehost) | |
4b1ac34b | 497 | { |
5a31170d N |
498 | /* NOTE: for 'assemble' and 'force' we need to return non-zero |
499 | * if any change was made. For others, the return value is | |
500 | * ignored. | |
c4d831e1 | 501 | */ |
4b1ac34b | 502 | int rv = 0; |
3b7e9d0c | 503 | int uuid[4]; |
3da92f27 | 504 | mdp_super_t *sb = st->sb; |
def11332 N |
505 | |
506 | if (strcmp(update, "homehost") == 0 && | |
507 | homehost) { | |
508 | /* note that 'homehost' is special as it is really | |
509 | * a "uuid" update. | |
510 | */ | |
511 | uuid_set = 0; | |
512 | update = "uuid"; | |
513 | info->uuid[0] = sb->set_uuid0; | |
514 | info->uuid[1] = sb->set_uuid1; | |
515 | } | |
516 | ||
4b1ac34b NB |
517 | if (strcmp(update, "sparc2.2")==0 ) { |
518 | /* 2.2 sparc put the events in the wrong place | |
519 | * So we copy the tail of the superblock | |
520 | * up 4 bytes before continuing | |
521 | */ | |
522 | __u32 *sb32 = (__u32*)sb; | |
523 | memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, | |
524 | sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1, | |
525 | (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4); | |
dab6685f | 526 | if (verbose >= 0) |
dae45415 | 527 | pr_err("adjusting superblock of %s for 2.2/sparc compatibility.\n", |
e7b84f9d | 528 | devname); |
1e2b2765 | 529 | } else if (strcmp(update, "super-minor") ==0) { |
4b1ac34b | 530 | sb->md_minor = info->array.md_minor; |
dab6685f | 531 | if (verbose > 0) |
e7b84f9d | 532 | pr_err("updating superblock of %s with minor number %d\n", |
4b1ac34b | 533 | devname, info->array.md_minor); |
1e2b2765 | 534 | } else if (strcmp(update, "summaries") == 0) { |
f21e18ca | 535 | unsigned int i; |
4b1ac34b | 536 | /* set nr_disks, active_disks, working_disks, |
aba69144 | 537 | * failed_disks, spare_disks based on disks[] |
4b1ac34b NB |
538 | * array in superblock. |
539 | * Also make sure extra slots aren't 'failed' | |
540 | */ | |
541 | sb->nr_disks = sb->active_disks = | |
542 | sb->working_disks = sb->failed_disks = | |
543 | sb->spare_disks = 0; | |
aba69144 | 544 | for (i=0; i < MD_SB_DISKS ; i++) |
4b1ac34b NB |
545 | if (sb->disks[i].major || |
546 | sb->disks[i].minor) { | |
547 | int state = sb->disks[i].state; | |
548 | if (state & (1<<MD_DISK_REMOVED)) | |
549 | continue; | |
550 | sb->nr_disks++; | |
551 | if (state & (1<<MD_DISK_ACTIVE)) | |
552 | sb->active_disks++; | |
553 | if (state & (1<<MD_DISK_FAULTY)) | |
554 | sb->failed_disks++; | |
555 | else | |
556 | sb->working_disks++; | |
557 | if (state == 0) | |
558 | sb->spare_disks++; | |
559 | } else if (i >= sb->raid_disks && sb->disks[i].number == 0) | |
560 | sb->disks[i].state = 0; | |
1e2b2765 | 561 | } else if (strcmp(update, "force-one")==0) { |
67a8c82d NB |
562 | /* Not enough devices for a working array, so |
563 | * bring this one up-to-date. | |
564 | */ | |
c4d831e1 | 565 | __u32 ehi = sb->events_hi, elo = sb->events_lo; |
4b1ac34b NB |
566 | sb->events_hi = (info->events>>32) & 0xFFFFFFFF; |
567 | sb->events_lo = (info->events) & 0xFFFFFFFF; | |
c4d831e1 NB |
568 | if (sb->events_hi != ehi || |
569 | sb->events_lo != elo) | |
570 | rv = 1; | |
1e2b2765 | 571 | } else if (strcmp(update, "force-array")==0) { |
67a8c82d NB |
572 | /* degraded array and 'force' requested, so |
573 | * maybe need to mark it 'clean' | |
574 | */ | |
c4d831e1 NB |
575 | if ((sb->level == 5 || sb->level == 4 || sb->level == 6) && |
576 | (sb->state & (1 << MD_SB_CLEAN)) == 0) { | |
4b1ac34b NB |
577 | /* need to force clean */ |
578 | sb->state |= (1 << MD_SB_CLEAN); | |
c4d831e1 NB |
579 | rv = 1; |
580 | } | |
1e2b2765 | 581 | } else if (strcmp(update, "assemble")==0) { |
4b1ac34b | 582 | int d = info->disk.number; |
dfd4d8ee | 583 | int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY); |
71574efb N |
584 | int failfast = sb->disks[d].state & (1<<MD_DISK_FAILFAST); |
585 | int mask = (1<<MD_DISK_WRITEMOSTLY)|(1<<MD_DISK_FAILFAST); | |
672ca1b7 N |
586 | int add = 0; |
587 | if (sb->minor_version >= 91) | |
588 | /* During reshape we don't insist on everything | |
589 | * being marked 'sync' | |
590 | */ | |
591 | add = (1<<MD_DISK_SYNC); | |
d16a7494 JS |
592 | if (((sb->disks[d].state & ~mask) | add) != |
593 | (unsigned)info->disk.state) { | |
71574efb | 594 | sb->disks[d].state = info->disk.state | wonly |failfast; |
4b1ac34b NB |
595 | rv = 1; |
596 | } | |
d43494fc N |
597 | if (info->reshape_active && |
598 | sb->minor_version > 90 && (sb->reshape_position+1) != 0 && | |
599 | info->delta_disks >= 0 && | |
600 | info->reshape_progress < sb->reshape_position) { | |
601 | sb->reshape_position = info->reshape_progress; | |
602 | rv = 1; | |
603 | } | |
604 | if (info->reshape_active && | |
605 | sb->minor_version > 90 && (sb->reshape_position+1) != 0 && | |
606 | info->delta_disks < 0 && | |
607 | info->reshape_progress > sb->reshape_position) { | |
608 | sb->reshape_position = info->reshape_progress; | |
609 | rv = 1; | |
610 | } | |
1e2b2765 | 611 | } else if (strcmp(update, "linear-grow-new") == 0) { |
f752781f NB |
612 | memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0])); |
613 | sb->disks[info->disk.number].number = info->disk.number; | |
614 | sb->disks[info->disk.number].major = info->disk.major; | |
615 | sb->disks[info->disk.number].minor = info->disk.minor; | |
616 | sb->disks[info->disk.number].raid_disk = info->disk.raid_disk; | |
617 | sb->disks[info->disk.number].state = info->disk.state; | |
618 | sb->this_disk = sb->disks[info->disk.number]; | |
1e2b2765 | 619 | } else if (strcmp(update, "linear-grow-update") == 0) { |
4b1ac34b NB |
620 | sb->raid_disks = info->array.raid_disks; |
621 | sb->nr_disks = info->array.nr_disks; | |
622 | sb->active_disks = info->array.active_disks; | |
623 | sb->working_disks = info->array.working_disks; | |
624 | memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0])); | |
625 | sb->disks[info->disk.number].number = info->disk.number; | |
626 | sb->disks[info->disk.number].major = info->disk.major; | |
627 | sb->disks[info->disk.number].minor = info->disk.minor; | |
628 | sb->disks[info->disk.number].raid_disk = info->disk.raid_disk; | |
629 | sb->disks[info->disk.number].state = info->disk.state; | |
1e2b2765 | 630 | } else if (strcmp(update, "resync") == 0) { |
4b1ac34b NB |
631 | /* make sure resync happens */ |
632 | sb->state &= ~(1<<MD_SB_CLEAN); | |
633 | sb->recovery_cp = 0; | |
1e2b2765 | 634 | } else if (strcmp(update, "uuid") == 0) { |
e5eac01f | 635 | if (!uuid_set && homehost) { |
8268ed74 NB |
636 | char buf[20]; |
637 | char *hash = sha1_buffer(homehost, | |
638 | strlen(homehost), | |
639 | buf); | |
e5eac01f NB |
640 | memcpy(info->uuid+2, hash, 8); |
641 | } | |
7d99579f NB |
642 | sb->set_uuid0 = info->uuid[0]; |
643 | sb->set_uuid1 = info->uuid[1]; | |
644 | sb->set_uuid2 = info->uuid[2]; | |
645 | sb->set_uuid3 = info->uuid[3]; | |
14263cf1 NB |
646 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) { |
647 | struct bitmap_super_s *bm; | |
648 | bm = (struct bitmap_super_s*)(sb+1); | |
3b7e9d0c LB |
649 | uuid_from_super0(st, uuid); |
650 | memcpy(bm->uuid, uuid, 16); | |
14263cf1 | 651 | } |
afa368f4 N |
652 | } else if (strcmp(update, "metadata") == 0) { |
653 | /* Create some v1.0 metadata to match ours but make the | |
654 | * ctime bigger. Also update info->array.*_version. | |
655 | * We need to arrange that store_super writes out | |
656 | * the v1.0 metadata. | |
657 | * Not permitted for unclean array, or array with | |
658 | * bitmap. | |
659 | */ | |
660 | if (info->bitmap_offset) { | |
661 | pr_err("Cannot update metadata when bitmap is present\n"); | |
662 | rv = -2; | |
663 | } else if (info->array.state != 1) { | |
664 | pr_err("Cannot update metadata on unclean array\n"); | |
665 | rv = -2; | |
666 | } else { | |
667 | info->array.major_version = 1; | |
668 | info->array.minor_version = 0; | |
669 | uuid_from_super0(st, info->uuid); | |
670 | st->other = super1_make_v0(st, info, st->sb); | |
671 | } | |
199f1a1f N |
672 | } else if (strcmp(update, "revert-reshape") == 0) { |
673 | rv = -2; | |
674 | if (sb->minor_version <= 90) | |
675 | pr_err("No active reshape to revert on %s\n", | |
676 | devname); | |
677 | else if (sb->delta_disks == 0) | |
efb3994e | 678 | pr_err("%s: Can only revert reshape which changes number of devices\n", |
199f1a1f N |
679 | devname); |
680 | else { | |
681 | int tmp; | |
a2836f12 | 682 | int parity = sb->level == 6 ? 2 : 1; |
199f1a1f | 683 | rv = 0; |
a2836f12 | 684 | |
efb3994e N |
685 | if (sb->level >= 4 && sb->level <= 6 && |
686 | sb->reshape_position % ( | |
a2836f12 N |
687 | sb->new_chunk/512 * |
688 | (sb->raid_disks - sb->delta_disks - parity))) { | |
689 | pr_err("Reshape position is not suitably aligned.\n"); | |
2bf62891 | 690 | pr_err("Try normal assembly and stop again\n"); |
a2836f12 N |
691 | return -2; |
692 | } | |
199f1a1f N |
693 | sb->raid_disks -= sb->delta_disks; |
694 | sb->delta_disks = -sb->delta_disks; | |
695 | ||
696 | tmp = sb->new_layout; | |
697 | sb->new_layout = sb->layout; | |
698 | sb->layout = tmp; | |
699 | ||
700 | tmp = sb->new_chunk; | |
701 | sb->new_chunk = sb->chunk_size; | |
702 | sb->chunk_size = tmp; | |
703 | } | |
5a31170d N |
704 | } else if (strcmp(update, "no-bitmap") == 0) { |
705 | sb->state &= ~(1<<MD_SB_BITMAP_PRESENT); | |
1e2b2765 | 706 | } else if (strcmp(update, "_reshape_progress")==0) |
353632d9 | 707 | sb->reshape_position = info->reshape_progress; |
16715c01 DL |
708 | else if (strcmp(update, "writemostly")==0) |
709 | sb->state |= (1<<MD_DISK_WRITEMOSTLY); | |
710 | else if (strcmp(update, "readwrite")==0) | |
711 | sb->state &= ~(1<<MD_DISK_WRITEMOSTLY); | |
1e2b2765 N |
712 | else |
713 | rv = -1; | |
4b1ac34b NB |
714 | |
715 | sb->sb_csum = calc_sb0_csum(sb); | |
716 | return rv; | |
717 | } | |
718 | ||
05697ec1 | 719 | /* |
a8cb6604 JS |
720 | * For version-0 superblock, the homehost is 'stored' in the uuid. |
721 | * 8 bytes for a hash of the host leaving 8 bytes of random material. | |
722 | * We use the first 8 bytes (64bits) of the sha1 of the host name | |
05697ec1 | 723 | */ |
3da92f27 | 724 | static int init_super0(struct supertype *st, mdu_array_info_t *info, |
5308f117 | 725 | struct shape *s, char *ignored_name, |
a8cb6604 JS |
726 | char *homehost, int *uuid, |
727 | unsigned long long data_offset) | |
4b1ac34b | 728 | { |
6416d527 | 729 | mdp_super_t *sb; |
82d9eba6 | 730 | int spares; |
6416d527 | 731 | |
83cd1e97 | 732 | if (data_offset != INVALID_SECTORS) { |
ed503f89 | 733 | pr_err("data-offset not support for 0.90\n"); |
83cd1e97 N |
734 | return 0; |
735 | } | |
736 | ||
b550887f N |
737 | if (posix_memalign((void**)&sb, 4096, |
738 | MD_SB_BYTES + ROUND_UP(sizeof(bitmap_super_t), 4096)) != 0) { | |
1ade5cc1 | 739 | pr_err("could not allocate superblock\n"); |
3d2c4fc7 DW |
740 | return 0; |
741 | } | |
55935d51 | 742 | memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b | 743 | |
64557c33 | 744 | st->sb = sb; |
ba7eb04f | 745 | if (info == NULL) { |
f9ce90ba | 746 | /* zeroing the superblock */ |
82d9eba6 NB |
747 | return 0; |
748 | } | |
749 | ||
750 | spares = info->working_disks - info->active_disks; | |
751 | if (info->raid_disks + spares > MD_SB_DISKS) { | |
e7b84f9d | 752 | pr_err("too many devices requested: %d+%d > %d\n", |
82d9eba6 NB |
753 | info->raid_disks , spares, MD_SB_DISKS); |
754 | return 0; | |
f9ce90ba NB |
755 | } |
756 | ||
4b1ac34b NB |
757 | sb->md_magic = MD_SB_MAGIC; |
758 | sb->major_version = 0; | |
759 | sb->minor_version = 90; | |
760 | sb->patch_version = 0; | |
761 | sb->gvalid_words = 0; /* ignored */ | |
4b1ac34b NB |
762 | sb->ctime = time(0); |
763 | sb->level = info->level; | |
5308f117 AP |
764 | sb->size = s->size; |
765 | if (s->size != (unsigned long long)sb->size) | |
5dd497ee | 766 | return 0; |
4b1ac34b NB |
767 | sb->nr_disks = info->nr_disks; |
768 | sb->raid_disks = info->raid_disks; | |
769 | sb->md_minor = info->md_minor; | |
770 | sb->not_persistent = 0; | |
3d3dd91e NB |
771 | if (uuid) { |
772 | sb->set_uuid0 = uuid[0]; | |
773 | sb->set_uuid1 = uuid[1]; | |
774 | sb->set_uuid2 = uuid[2]; | |
775 | sb->set_uuid3 = uuid[3]; | |
776 | } else { | |
055b766b JS |
777 | __u32 r[4]; |
778 | random_uuid((__u8 *)r); | |
779 | sb->set_uuid0 = r[0]; | |
780 | sb->set_uuid1 = r[1]; | |
781 | sb->set_uuid2 = r[2]; | |
782 | sb->set_uuid3 = r[3]; | |
dfe47e00 | 783 | } |
30d48159 | 784 | if (homehost && !uuid) { |
8268ed74 NB |
785 | char buf[20]; |
786 | char *hash = sha1_buffer(homehost, | |
787 | strlen(homehost), | |
788 | buf); | |
05697ec1 NB |
789 | memcpy(&sb->set_uuid2, hash, 8); |
790 | } | |
4b1ac34b NB |
791 | |
792 | sb->utime = sb->ctime; | |
793 | sb->state = info->state; | |
794 | sb->active_disks = info->active_disks; | |
795 | sb->working_disks = info->working_disks; | |
796 | sb->failed_disks = info->failed_disks; | |
234a131a | 797 | sb->spare_disks = info->spare_disks; |
4b1ac34b NB |
798 | sb->events_hi = 0; |
799 | sb->events_lo = 1; | |
800 | ||
801 | sb->layout = info->layout; | |
802 | sb->chunk_size = info->chunk_size; | |
803 | ||
82d9eba6 | 804 | return 1; |
4b1ac34b NB |
805 | } |
806 | ||
111d01fc NB |
807 | struct devinfo { |
808 | int fd; | |
809 | char *devname; | |
810 | mdu_disk_info_t disk; | |
811 | struct devinfo *next; | |
812 | }; | |
0e600426 | 813 | |
4b1ac34b | 814 | /* Add a device to the superblock being created */ |
f20c3968 | 815 | static int add_to_super0(struct supertype *st, mdu_disk_info_t *dinfo, |
72ca9bcf | 816 | int fd, char *devname, unsigned long long data_offset) |
4b1ac34b | 817 | { |
3da92f27 | 818 | mdp_super_t *sb = st->sb; |
4b1ac34b | 819 | mdp_disk_t *dk = &sb->disks[dinfo->number]; |
111d01fc | 820 | struct devinfo *di, **dip; |
353632d9 | 821 | |
4b1ac34b NB |
822 | dk->number = dinfo->number; |
823 | dk->major = dinfo->major; | |
824 | dk->minor = dinfo->minor; | |
825 | dk->raid_disk = dinfo->raid_disk; | |
f4dc5e9b N |
826 | dk->state = dinfo->state & ((1<<MD_DISK_ACTIVE) | |
827 | (1<<MD_DISK_SYNC)); | |
111d01fc | 828 | |
d2ca6449 NB |
829 | sb->this_disk = sb->disks[dinfo->number]; |
830 | sb->sb_csum = calc_sb0_csum(sb); | |
831 | ||
111d01fc NB |
832 | dip = (struct devinfo **)&st->info; |
833 | while (*dip) | |
834 | dip = &(*dip)->next; | |
503975b9 | 835 | di = xmalloc(sizeof(struct devinfo)); |
111d01fc NB |
836 | di->fd = fd; |
837 | di->devname = devname; | |
838 | di->disk = *dinfo; | |
839 | di->next = NULL; | |
840 | *dip = di; | |
f20c3968 DW |
841 | |
842 | return 0; | |
4b1ac34b NB |
843 | } |
844 | ||
3da92f27 | 845 | static int store_super0(struct supertype *st, int fd) |
4b1ac34b | 846 | { |
4b1ac34b NB |
847 | unsigned long long dsize; |
848 | unsigned long long offset; | |
3da92f27 | 849 | mdp_super_t *super = st->sb; |
beae1dfe NB |
850 | |
851 | if (!get_dev_size(fd, NULL, &dsize)) | |
852 | return 1; | |
4b1ac34b | 853 | |
eb6dae98 | 854 | if (dsize < MD_RESERVED_SECTORS*512) |
4b1ac34b | 855 | return 2; |
353632d9 | 856 | |
afa368f4 N |
857 | if (st->other) { |
858 | /* Writing out v1.0 metadata for --update=metadata */ | |
f69bb608 | 859 | int ret = 0; |
afa368f4 N |
860 | |
861 | offset = dsize/512 - 8*2; | |
862 | offset &= ~(4*2-1); | |
863 | offset *= 512; | |
864 | if (lseek64(fd, offset, 0)< 0LL) | |
865 | ret = 3; | |
866 | else if (write(fd, st->other, 1024) != 1024) | |
867 | ret = 4; | |
868 | else | |
869 | fsync(fd); | |
870 | free(st->other); | |
871 | st->other = NULL; | |
872 | return ret; | |
873 | } | |
874 | ||
4b1ac34b NB |
875 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
876 | ||
877 | offset *= 512; | |
878 | ||
879 | if (lseek64(fd, offset, 0)< 0LL) | |
880 | return 3; | |
881 | ||
882 | if (write(fd, super, sizeof(*super)) != sizeof(*super)) | |
883 | return 4; | |
884 | ||
14263cf1 NB |
885 | if (super->state & (1<<MD_SB_BITMAP_PRESENT)) { |
886 | struct bitmap_super_s * bm = (struct bitmap_super_s*)(super+1); | |
887 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) | |
1011e834 | 888 | if (write(fd, bm, ROUND_UP(sizeof(*bm),4096)) != |
b550887f | 889 | ROUND_UP(sizeof(*bm),4096)) |
9fca7d62 | 890 | return 5; |
14263cf1 NB |
891 | } |
892 | ||
570c0542 | 893 | fsync(fd); |
4b1ac34b NB |
894 | return 0; |
895 | } | |
896 | ||
111d01fc | 897 | static int write_init_super0(struct supertype *st) |
4b1ac34b | 898 | { |
3da92f27 | 899 | mdp_super_t *sb = st->sb; |
111d01fc NB |
900 | int rv = 0; |
901 | struct devinfo *di; | |
4b1ac34b | 902 | |
111d01fc | 903 | for (di = st->info ; di && ! rv ; di = di->next) { |
4b1ac34b | 904 | |
f4dc5e9b | 905 | if (di->disk.state & (1 << MD_DISK_FAULTY)) |
111d01fc | 906 | continue; |
a0c8a17f NB |
907 | if (di->fd == -1) |
908 | continue; | |
ba728be7 | 909 | while (Kill(di->devname, NULL, 0, -1, 1) == 0) |
9277cc77 | 910 | ; |
8d75b7fc | 911 | |
111d01fc | 912 | sb->disks[di->disk.number].state &= ~(1<<MD_DISK_FAULTY); |
55935d51 | 913 | |
111d01fc NB |
914 | sb->this_disk = sb->disks[di->disk.number]; |
915 | sb->sb_csum = calc_sb0_csum(sb); | |
916 | rv = store_super0(st, di->fd); | |
55935d51 | 917 | |
111d01fc | 918 | if (rv == 0 && (sb->state & (1<<MD_SB_BITMAP_PRESENT))) |
0aa2f15b | 919 | rv = st->ss->write_bitmap(st, di->fd, NoUpdate); |
111d01fc NB |
920 | |
921 | if (rv) | |
e7b84f9d N |
922 | pr_err("failed to write superblock to %s\n", |
923 | di->devname); | |
111d01fc | 924 | } |
4b1ac34b NB |
925 | return rv; |
926 | } | |
927 | ||
64557c33 | 928 | static int compare_super0(struct supertype *st, struct supertype *tst) |
4b1ac34b NB |
929 | { |
930 | /* | |
931 | * return: | |
932 | * 0 same, or first was empty, and second was copied | |
933 | * 1 second had wrong number | |
934 | * 2 wrong uuid | |
935 | * 3 wrong other info | |
936 | */ | |
64557c33 NB |
937 | mdp_super_t *first = st->sb; |
938 | mdp_super_t *second = tst->sb; | |
4b1ac34b | 939 | int uuid1[4], uuid2[4]; |
64557c33 | 940 | |
4b1ac34b NB |
941 | if (second->md_magic != MD_SB_MAGIC) |
942 | return 1; | |
943 | if (!first) { | |
b550887f | 944 | if (posix_memalign((void**)&first, 4096, |
1011e834 | 945 | MD_SB_BYTES + |
b550887f | 946 | ROUND_UP(sizeof(struct bitmap_super_s), 4096)) != 0) { |
1ade5cc1 | 947 | pr_err("could not allocate superblock\n"); |
3d2c4fc7 DW |
948 | return 1; |
949 | } | |
14263cf1 | 950 | memcpy(first, second, MD_SB_BYTES + sizeof(struct bitmap_super_s)); |
64557c33 | 951 | st->sb = first; |
4b1ac34b NB |
952 | return 0; |
953 | } | |
954 | ||
3da92f27 NB |
955 | uuid_from_super0(st, uuid1); |
956 | uuid_from_super0(tst, uuid2); | |
f277ce36 | 957 | if (!same_uuid(uuid1, uuid2, 0)) |
4b1ac34b NB |
958 | return 2; |
959 | if (first->major_version != second->major_version || | |
960 | first->minor_version != second->minor_version || | |
961 | first->patch_version != second->patch_version || | |
962 | first->gvalid_words != second->gvalid_words || | |
963 | first->ctime != second->ctime || | |
964 | first->level != second->level || | |
965 | first->size != second->size || | |
966 | first->raid_disks != second->raid_disks ) | |
967 | return 3; | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
3da92f27 NB |
972 | static void free_super0(struct supertype *st); |
973 | ||
974 | static int load_super0(struct supertype *st, int fd, char *devname) | |
4b1ac34b NB |
975 | { |
976 | /* try to read in the superblock | |
977 | * Return: | |
978 | * 0 on success | |
979 | * 1 on cannot get superblock | |
980 | * 2 on superblock meaningless | |
981 | */ | |
4b1ac34b NB |
982 | unsigned long long dsize; |
983 | unsigned long long offset; | |
984 | mdp_super_t *super; | |
14263cf1 NB |
985 | int uuid[4]; |
986 | struct bitmap_super_s *bsb; | |
aba69144 | 987 | |
3da92f27 NB |
988 | free_super0(st); |
989 | ||
beae1dfe NB |
990 | if (!get_dev_size(fd, devname, &dsize)) |
991 | return 1; | |
4b1ac34b | 992 | |
eb6dae98 | 993 | if (dsize < MD_RESERVED_SECTORS*512) { |
4b1ac34b | 994 | if (devname) |
e7b84f9d N |
995 | pr_err("%s is too small for md: size is %llu sectors.\n", |
996 | devname, dsize); | |
4b1ac34b NB |
997 | return 1; |
998 | } | |
afa368f4 | 999 | st->devsize = dsize; |
353632d9 | 1000 | |
4b1ac34b NB |
1001 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
1002 | ||
1003 | offset *= 512; | |
1004 | ||
4b1ac34b NB |
1005 | if (lseek64(fd, offset, 0)< 0LL) { |
1006 | if (devname) | |
e7b84f9d | 1007 | pr_err("Cannot seek to superblock on %s: %s\n", |
4b1ac34b NB |
1008 | devname, strerror(errno)); |
1009 | return 1; | |
1010 | } | |
1011 | ||
b550887f N |
1012 | if (posix_memalign((void**)&super, 4096, |
1013 | MD_SB_BYTES + | |
1014 | ROUND_UP(sizeof(bitmap_super_t), 4096)) != 0) { | |
1ade5cc1 | 1015 | pr_err("could not allocate superblock\n"); |
3d2c4fc7 DW |
1016 | return 1; |
1017 | } | |
4b1ac34b NB |
1018 | |
1019 | if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) { | |
1020 | if (devname) | |
e7b84f9d | 1021 | pr_err("Cannot read superblock on %s\n", |
4b1ac34b NB |
1022 | devname); |
1023 | free(super); | |
1024 | return 1; | |
1025 | } | |
1026 | ||
586ed405 NB |
1027 | if (st->ss && st->minor_version == 9) |
1028 | super0_swap_endian(super); | |
1029 | ||
4b1ac34b NB |
1030 | if (super->md_magic != MD_SB_MAGIC) { |
1031 | if (devname) | |
e7b84f9d | 1032 | pr_err("No super block found on %s (Expected magic %08x, got %08x)\n", |
4b1ac34b NB |
1033 | devname, MD_SB_MAGIC, super->md_magic); |
1034 | free(super); | |
1035 | return 2; | |
1036 | } | |
1037 | ||
1038 | if (super->major_version != 0) { | |
1039 | if (devname) | |
e7b84f9d | 1040 | pr_err("Cannot interpret superblock on %s - version is %d\n", |
4b1ac34b NB |
1041 | devname, super->major_version); |
1042 | free(super); | |
1043 | return 2; | |
1044 | } | |
64557c33 | 1045 | st->sb = super; |
3da92f27 | 1046 | |
82d9eba6 NB |
1047 | if (st->ss == NULL) { |
1048 | st->ss = &super0; | |
5f98d3cb | 1049 | st->minor_version = super->minor_version; |
ea329559 | 1050 | st->max_devs = MD_SB_DISKS; |
111d01fc | 1051 | st->info = NULL; |
82d9eba6 NB |
1052 | } |
1053 | ||
14263cf1 NB |
1054 | /* Now check on the bitmap superblock */ |
1055 | if ((super->state & (1<<MD_SB_BITMAP_PRESENT)) == 0) | |
1056 | return 0; | |
1057 | /* Read the bitmap superblock and make sure it looks | |
1058 | * valid. If it doesn't clear the bit. An --assemble --force | |
1059 | * should get that written out. | |
1060 | */ | |
d16a7494 JS |
1061 | if (read(fd, super+1, ROUND_UP(sizeof(struct bitmap_super_s),4096)) != |
1062 | ROUND_UP(sizeof(struct bitmap_super_s), 4096)) | |
14263cf1 NB |
1063 | goto no_bitmap; |
1064 | ||
3da92f27 | 1065 | uuid_from_super0(st, uuid); |
14263cf1 NB |
1066 | bsb = (struct bitmap_super_s *)(super+1); |
1067 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
1068 | memcmp(bsb->uuid, uuid, 16) != 0) | |
1069 | goto no_bitmap; | |
1070 | return 0; | |
1071 | ||
1072 | no_bitmap: | |
1073 | super->state &= ~(1<<MD_SB_BITMAP_PRESENT); | |
1074 | ||
4b1ac34b NB |
1075 | return 0; |
1076 | } | |
f9ce90ba | 1077 | |
82d9eba6 | 1078 | static struct supertype *match_metadata_desc0(char *arg) |
f9ce90ba | 1079 | { |
503975b9 | 1080 | struct supertype *st = xcalloc(1, sizeof(*st)); |
82d9eba6 | 1081 | |
4dd2df09 | 1082 | st->container_devnm[0] = 0; |
82d9eba6 | 1083 | st->ss = &super0; |
111d01fc | 1084 | st->info = NULL; |
82d9eba6 | 1085 | st->minor_version = 90; |
ea329559 | 1086 | st->max_devs = MD_SB_DISKS; |
64557c33 | 1087 | st->sb = NULL; |
9b2a22d3 N |
1088 | /* we sometimes get 00.90 */ |
1089 | while (arg[0] == '0' && arg[1] == '0') | |
1090 | arg++; | |
f9ce90ba | 1091 | if (strcmp(arg, "0") == 0 || |
26f467a9 | 1092 | #ifdef DEFAULT_OLD_METADATA /* ifndef in super1.c */ |
1093 | strcmp(arg, "default") == 0 || | |
1094 | #endif /* DEFAULT_OLD_METADATA */ | |
50827504 N |
1095 | strcmp(arg, "0.90") == 0 || |
1096 | strcmp(arg, "") == 0 /* no metadata - i.e. non_persistent */ | |
f9ce90ba | 1097 | ) |
82d9eba6 NB |
1098 | return st; |
1099 | ||
56f8add2 NB |
1100 | st->minor_version = 91; /* reshape in progress */ |
1101 | if (strcmp(arg, "0.91") == 0) /* For dup_super support */ | |
1102 | return st; | |
1103 | ||
586ed405 | 1104 | st->minor_version = 9; /* flag for 'byte-swapped' */ |
ff1f6545 NB |
1105 | if (strcmp(arg, "0.swap")==0 || |
1106 | strcmp(arg, "0.9") == 0) /* For dup_super support */ | |
586ed405 NB |
1107 | return st; |
1108 | ||
82d9eba6 NB |
1109 | free(st); |
1110 | return NULL; | |
1111 | } | |
1112 | ||
387fcd59 N |
1113 | static __u64 avail_size0(struct supertype *st, __u64 devsize, |
1114 | unsigned long long data_offset) | |
82d9eba6 | 1115 | { |
387fcd59 N |
1116 | if (data_offset != 0 && data_offset != INVALID_SECTORS) |
1117 | return 0ULL; | |
eb6dae98 | 1118 | if (devsize < MD_RESERVED_SECTORS) |
82d9eba6 NB |
1119 | return 0ULL; |
1120 | return MD_NEW_SIZE_SECTORS(devsize); | |
f9ce90ba NB |
1121 | } |
1122 | ||
3da92f27 | 1123 | static int add_internal_bitmap0(struct supertype *st, int *chunkp, |
199171a2 NB |
1124 | int delay, int write_behind, |
1125 | unsigned long long size, int may_change, | |
1126 | int major) | |
55935d51 NB |
1127 | { |
1128 | /* | |
1129 | * The bitmap comes immediately after the superblock and must be 60K in size | |
1130 | * at most. The default size is between 30K and 60K | |
1131 | * | |
8686f3ed | 1132 | * size is in sectors, chunk is in bytes !!! |
55935d51 | 1133 | */ |
1bf4e2d9 | 1134 | unsigned long long bits; |
50526e90 | 1135 | unsigned long long max_bits = (60*1024 - sizeof(bitmap_super_t))*8; |
55935d51 | 1136 | unsigned long long min_chunk; |
199171a2 | 1137 | int chunk = *chunkp; |
3da92f27 | 1138 | mdp_super_t *sb = st->sb; |
55935d51 | 1139 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES); |
3b7e9d0c | 1140 | int uuid[4]; |
55935d51 | 1141 | |
f277ce36 | 1142 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ |
8686f3ed | 1143 | bits = (size * 512) / min_chunk + 1; |
55935d51 NB |
1144 | while (bits > max_bits) { |
1145 | min_chunk *= 2; | |
1146 | bits = (bits+1)/2; | |
1147 | } | |
b8ab2a50 N |
1148 | if (chunk == UnSet) { |
1149 | /* A chunk size less than a few Megabytes gives poor | |
1150 | * performance without increasing resync noticeably | |
1151 | */ | |
55935d51 | 1152 | chunk = min_chunk; |
b8ab2a50 N |
1153 | if (chunk < 64*1024*1024) |
1154 | chunk = 64*1024*1024; | |
f21e18ca | 1155 | } else if ((unsigned long long)chunk < min_chunk) |
2ec2b7e9 | 1156 | return -EINVAL; /* chunk size too small */ |
55935d51 NB |
1157 | |
1158 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); | |
1159 | ||
29e766a5 | 1160 | memset(bms, 0, sizeof(*bms)); |
dfd4d8ee | 1161 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
dcec9ee5 | 1162 | bms->version = __cpu_to_le32(major); |
3b7e9d0c LB |
1163 | uuid_from_super0(st, uuid); |
1164 | memcpy(bms->uuid, uuid, 16); | |
dfd4d8ee NB |
1165 | bms->chunksize = __cpu_to_le32(chunk); |
1166 | bms->daemon_sleep = __cpu_to_le32(delay); | |
f9c25f1d | 1167 | bms->sync_size = __cpu_to_le64(size); |
dfd4d8ee | 1168 | bms->write_behind = __cpu_to_le32(write_behind); |
199171a2 | 1169 | *chunkp = chunk; |
2ec2b7e9 | 1170 | return 0; |
55935d51 | 1171 | } |
353632d9 | 1172 | |
b138214f | 1173 | static int locate_bitmap0(struct supertype *st, int fd, int node_num) |
55935d51 NB |
1174 | { |
1175 | unsigned long long dsize; | |
55935d51 | 1176 | unsigned long long offset; |
55935d51 | 1177 | |
beae1dfe | 1178 | if (!get_dev_size(fd, NULL, &dsize)) |
53e76b1d | 1179 | return -1; |
beae1dfe | 1180 | |
eb6dae98 | 1181 | if (dsize < MD_RESERVED_SECTORS*512) |
53e76b1d | 1182 | return -1; |
353632d9 | 1183 | |
55935d51 NB |
1184 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
1185 | ||
1186 | offset *= 512; | |
1187 | ||
1188 | offset += MD_SB_BYTES; | |
1189 | ||
1190 | lseek64(fd, offset, 0); | |
53e76b1d | 1191 | return 0; |
55935d51 NB |
1192 | } |
1193 | ||
0aa2f15b | 1194 | static int write_bitmap0(struct supertype *st, int fd, enum bitmap_update update) |
8d75b7fc | 1195 | { |
8d75b7fc NB |
1196 | unsigned long long dsize; |
1197 | unsigned long long offset; | |
3da92f27 | 1198 | mdp_super_t *sb = st->sb; |
aba69144 | 1199 | |
8d75b7fc NB |
1200 | int rv = 0; |
1201 | ||
1202 | int towrite, n; | |
d669228f | 1203 | void *buf; |
8d75b7fc | 1204 | |
beae1dfe NB |
1205 | if (!get_dev_size(fd, NULL, &dsize)) |
1206 | return 1; | |
1207 | ||
eb6dae98 NB |
1208 | if (dsize < MD_RESERVED_SECTORS*512) |
1209 | return -1; | |
353632d9 | 1210 | |
8d75b7fc NB |
1211 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
1212 | ||
1213 | offset *= 512; | |
1214 | ||
1215 | if (lseek64(fd, offset + 4096, 0)< 0LL) | |
1216 | return 3; | |
1217 | ||
d669228f JS |
1218 | if (posix_memalign(&buf, 4096, 4096)) |
1219 | return -ENOMEM; | |
1220 | ||
6416d527 NB |
1221 | memset(buf, 0xff, 4096); |
1222 | memcpy(buf, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t)); | |
50526e90 | 1223 | towrite = 60*1024; |
8d75b7fc NB |
1224 | while (towrite > 0) { |
1225 | n = towrite; | |
6416d527 NB |
1226 | if (n > 4096) |
1227 | n = 4096; | |
8d75b7fc NB |
1228 | n = write(fd, buf, n); |
1229 | if (n > 0) | |
1230 | towrite -= n; | |
1231 | else | |
1232 | break; | |
6416d527 | 1233 | memset(buf, 0xff, 4096); |
8d75b7fc | 1234 | } |
dfd4d8ee | 1235 | fsync(fd); |
8d75b7fc NB |
1236 | if (towrite) |
1237 | rv = -2; | |
1238 | ||
d669228f | 1239 | free(buf); |
8d75b7fc NB |
1240 | return rv; |
1241 | } | |
55935d51 | 1242 | |
3da92f27 | 1243 | static void free_super0(struct supertype *st) |
df37ffc0 | 1244 | { |
3da92f27 NB |
1245 | if (st->sb) |
1246 | free(st->sb); | |
1cc7f4fe N |
1247 | while (st->info) { |
1248 | struct devinfo *di = st->info; | |
1249 | st->info = di->next; | |
1250 | if (di->fd >= 0) | |
1251 | close(di->fd); | |
1252 | free(di); | |
1253 | } | |
3da92f27 | 1254 | st->sb = NULL; |
df37ffc0 NB |
1255 | } |
1256 | ||
17f25ca6 NB |
1257 | static int validate_geometry0(struct supertype *st, int level, |
1258 | int layout, int raiddisks, | |
c21e737b | 1259 | int *chunk, unsigned long long size, |
af4348dd | 1260 | unsigned long long data_offset, |
2c514b71 | 1261 | char *subdev, unsigned long long *freesize, |
5308f117 | 1262 | int consistency_policy, int verbose) |
17f25ca6 NB |
1263 | { |
1264 | unsigned long long ldsize; | |
1265 | int fd; | |
01619b48 N |
1266 | unsigned int tbmax = 4; |
1267 | ||
1268 | /* prior to linux 3.1, a but limits usable device size to 2TB. | |
1269 | * It was introduced in 2.6.29, but we won't worry about that detail | |
1270 | */ | |
1271 | if (get_linux_version() < 3001000) | |
1272 | tbmax = 2; | |
17f25ca6 | 1273 | |
b42f577a N |
1274 | if (level == LEVEL_CONTAINER) { |
1275 | if (verbose) | |
e7b84f9d | 1276 | pr_err("0.90 metadata does not support containers\n"); |
17f25ca6 | 1277 | return 0; |
b42f577a N |
1278 | } |
1279 | if (raiddisks > MD_SB_DISKS) { | |
1280 | if (verbose) | |
e7b84f9d | 1281 | pr_err("0.90 metadata supports at most %d devices per array\n", |
b42f577a | 1282 | MD_SB_DISKS); |
17f25ca6 | 1283 | return 0; |
b42f577a | 1284 | } |
9c8c1218 | 1285 | if (size >= tbmax * 2ULL*1024*1024*1024) { |
b42f577a | 1286 | if (verbose) |
7a862a02 | 1287 | pr_err("0.90 metadata supports at most %d terabytes per device\n", tbmax); |
17f25ca6 | 1288 | return 0; |
b42f577a | 1289 | } |
7ccc4cc4 | 1290 | if (*chunk == UnSet) |
bb7295f1 N |
1291 | *chunk = DEFAULT_CHUNK; |
1292 | ||
17f25ca6 NB |
1293 | if (!subdev) |
1294 | return 1; | |
1295 | ||
1296 | fd = open(subdev, O_RDONLY|O_EXCL, 0); | |
1297 | if (fd < 0) { | |
2c514b71 | 1298 | if (verbose) |
e7b84f9d | 1299 | pr_err("super0.90 cannot open %s: %s\n", |
2c514b71 | 1300 | subdev, strerror(errno)); |
17f25ca6 NB |
1301 | return 0; |
1302 | } | |
2c514b71 | 1303 | |
17f25ca6 NB |
1304 | if (!get_dev_size(fd, subdev, &ldsize)) { |
1305 | close(fd); | |
1306 | return 0; | |
1307 | } | |
1308 | close(fd); | |
1309 | ||
1310 | if (ldsize < MD_RESERVED_SECTORS * 512) | |
1311 | return 0; | |
17f25ca6 NB |
1312 | *freesize = MD_NEW_SIZE_SECTORS(ldsize >> 9); |
1313 | return 1; | |
1314 | } | |
1315 | ||
f9ce90ba NB |
1316 | struct superswitch super0 = { |
1317 | .examine_super = examine_super0, | |
1318 | .brief_examine_super = brief_examine_super0, | |
0d726f17 | 1319 | .export_examine_super = export_examine_super0, |
f9ce90ba NB |
1320 | .detail_super = detail_super0, |
1321 | .brief_detail_super = brief_detail_super0, | |
111d01fc | 1322 | .write_init_super = write_init_super0, |
0e600426 N |
1323 | .validate_geometry = validate_geometry0, |
1324 | .add_to_super = add_to_super0, | |
74db60b0 | 1325 | .copy_metadata = copy_metadata0, |
83b6208e | 1326 | .match_home = match_home0, |
f9ce90ba NB |
1327 | .uuid_from_super = uuid_from_super0, |
1328 | .getinfo_super = getinfo_super0, | |
00bbdbda | 1329 | .container_content = container_content0, |
f9ce90ba | 1330 | .update_super = update_super0, |
f9ce90ba | 1331 | .init_super = init_super0, |
f9ce90ba | 1332 | .store_super = store_super0, |
f9ce90ba NB |
1333 | .compare_super = compare_super0, |
1334 | .load_super = load_super0, | |
1335 | .match_metadata_desc = match_metadata_desc0, | |
82d9eba6 | 1336 | .avail_size = avail_size0, |
55935d51 NB |
1337 | .add_internal_bitmap = add_internal_bitmap0, |
1338 | .locate_bitmap = locate_bitmap0, | |
8d75b7fc | 1339 | .write_bitmap = write_bitmap0, |
df37ffc0 | 1340 | .free_super = free_super0, |
4cce4069 | 1341 | .name = "0.90", |
f9ce90ba | 1342 | }; |