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4b1ac34b NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4f589ad0 | 4 | * Copyright (C) 2001-2006 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 | |
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" | |
05697ec1 | 31 | #include <openssl/sha.h> /* for SHA1 */ |
4b1ac34b NB |
32 | /* |
33 | * All handling for the 0.90.0 version superblock is in | |
34 | * this file. | |
35 | * This includes: | |
36 | * - finding, loading, and writing the superblock. | |
37 | * - initialising a new superblock | |
38 | * - printing the superblock for --examine | |
39 | * - printing part of the superblock for --detail | |
40 | * .. other stuff | |
41 | */ | |
42 | ||
43 | ||
44 | static unsigned long calc_sb0_csum(mdp_super_t *super) | |
45 | { | |
46 | unsigned long csum = super->sb_csum; | |
47 | unsigned long newcsum; | |
48 | super->sb_csum= 0 ; | |
49 | newcsum = calc_csum(super, MD_SB_BYTES); | |
50 | super->sb_csum = csum; | |
51 | return newcsum; | |
52 | } | |
53 | ||
586ed405 NB |
54 | |
55 | void super0_swap_endian(struct mdp_superblock_s *sb) | |
56 | { | |
57 | /* as super0 superblocks are host-endian, it is sometimes | |
58 | * useful to be able to swap the endianness | |
59 | * as (almost) everything is u32's we byte-swap every 4byte | |
60 | * number. | |
61 | * We then also have to swap the events_hi and events_lo | |
62 | */ | |
63 | char *sbc = (char *)sb; | |
64 | __u32 t32; | |
65 | int i; | |
66 | ||
67 | for (i=0; i < MD_SB_BYTES ; i+=4) { | |
68 | char t = sbc[i]; | |
69 | sbc[i] = sbc[i+3]; | |
70 | sbc[i+3] = t; | |
71 | t=sbc[i+1]; | |
72 | sbc[i+1]=sbc[i+2]; | |
73 | sbc[i+2]=t; | |
74 | } | |
75 | t32 = sb->events_hi; | |
76 | sb->events_hi = sb->events_lo; | |
77 | sb->events_lo = t32; | |
78 | ||
79 | t32 = sb->cp_events_hi; | |
80 | sb->cp_events_hi = sb->cp_events_lo; | |
81 | sb->cp_events_lo = t32; | |
82 | ||
353632d9 | 83 | } |
586ed405 | 84 | |
c7654afc | 85 | #ifndef MDASSEMBLE |
586ed405 | 86 | |
a1cbd7d0 | 87 | static void examine_super0(void *sbv, char *homehost) |
4b1ac34b NB |
88 | { |
89 | mdp_super_t *sb = sbv; | |
90 | time_t atime; | |
91 | int d; | |
92 | char *c; | |
93 | ||
94 | printf(" Magic : %08x\n", sb->md_magic); | |
95 | printf(" Version : %02d.%02d.%02d\n", sb->major_version, sb->minor_version, | |
96 | sb->patch_version); | |
a1cbd7d0 NB |
97 | if (sb->minor_version >= 90) { |
98 | printf(" UUID : %08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
4b1ac34b | 99 | sb->set_uuid2, sb->set_uuid3); |
a1cbd7d0 NB |
100 | if (homehost) { |
101 | unsigned char *hash = SHA1((unsigned char *)homehost, | |
102 | strlen(homehost), | |
103 | NULL); | |
104 | if (memcmp(&sb->set_uuid2, hash, 8)==0) | |
105 | printf(" (local to host %s)", homehost); | |
106 | } | |
107 | printf("\n"); | |
108 | } else | |
4b1ac34b NB |
109 | printf(" UUID : %08x\n", sb->set_uuid0); |
110 | ||
111 | atime = sb->ctime; | |
112 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
113 | c=map_num(pers, sb->level); | |
114 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
b674b5b8 NB |
115 | if ((int)sb->level >= 0) { |
116 | int ddsks=0; | |
4b1ac34b | 117 | printf(" Device Size : %d%s\n", sb->size, human_size((long long)sb->size<<10)); |
b674b5b8 NB |
118 | switch(sb->level) { |
119 | case 1: ddsks=1;break; | |
120 | case 4: | |
121 | case 5: ddsks = sb->raid_disks-1; break; | |
122 | case 6: ddsks = sb->raid_disks-2; break; | |
123 | case 10: ddsks = sb->raid_disks / (sb->layout&255) / ((sb->layout>>8)&255); | |
124 | } | |
125 | if (ddsks) | |
126 | printf(" Array Size : %llu%s\n", (unsigned long long)ddsks * sb->size, | |
127 | human_size(ddsks*(long long)sb->size<<10)); | |
128 | } | |
4b1ac34b NB |
129 | printf(" Raid Devices : %d\n", sb->raid_disks); |
130 | printf(" Total Devices : %d\n", sb->nr_disks); | |
131 | printf("Preferred Minor : %d\n", sb->md_minor); | |
132 | printf("\n"); | |
b674b5b8 | 133 | if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) { |
1e0d770c | 134 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)sb->reshape_position/2, human_size((long long)sb->reshape_position<<9)); |
b674b5b8 NB |
135 | if (sb->delta_disks) { |
136 | printf(" Delta Devices : %d", sb->delta_disks); | |
137 | if (sb->delta_disks) | |
138 | printf(" (%d->%d)\n", sb->raid_disks-sb->delta_disks, sb->raid_disks); | |
139 | else | |
140 | printf(" (%d->%d)\n", sb->raid_disks, sb->raid_disks+sb->delta_disks); | |
141 | } | |
142 | if (sb->new_level != sb->level) { | |
143 | c = map_num(pers, sb->new_level); | |
144 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
145 | } | |
146 | if (sb->new_layout != sb->layout) { | |
147 | if (sb->level == 5) { | |
148 | c = map_num(r5layout, sb->new_layout); | |
149 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
150 | } | |
151 | if (sb->level == 10) { | |
b578481c NB |
152 | printf(" New Layout : near=%d, %s=%d\n", |
153 | sb->new_layout&255, | |
154 | (sb->new_layout&0x10000)?"offset":"far", | |
155 | (sb->new_layout>>8)&255); | |
b674b5b8 NB |
156 | } |
157 | } | |
158 | if (sb->new_chunk != sb->chunk_size) | |
159 | printf(" New Chunksize : %d\n", sb->new_chunk); | |
160 | printf("\n"); | |
161 | } | |
4b1ac34b NB |
162 | atime = sb->utime; |
163 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
164 | printf(" State : %s\n", | |
165 | (sb->state&(1<<MD_SB_CLEAN))?"clean":"active"); | |
55935d51 NB |
166 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) |
167 | printf("Internal Bitmap : present\n"); | |
4b1ac34b NB |
168 | printf(" Active Devices : %d\n", sb->active_disks); |
169 | printf("Working Devices : %d\n", sb->working_disks); | |
170 | printf(" Failed Devices : %d\n", sb->failed_disks); | |
171 | printf(" Spare Devices : %d\n", sb->spare_disks); | |
172 | if (calc_sb0_csum(sb) == sb->sb_csum) | |
173 | printf(" Checksum : %x - correct\n", sb->sb_csum); | |
174 | else | |
175 | printf(" Checksum : %x - expected %lx\n", sb->sb_csum, calc_sb0_csum(sb)); | |
176 | printf(" Events : %d.%d\n", sb->events_hi, sb->events_lo); | |
177 | printf("\n"); | |
178 | if (sb->level == 5) { | |
179 | c = map_num(r5layout, sb->layout); | |
180 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
181 | } | |
265e0f17 | 182 | if (sb->level == 10) { |
b578481c NB |
183 | printf(" Layout : near=%d, %s=%d\n", |
184 | sb->layout&255, | |
185 | (sb->layout&0x10000)?"offset":"far", | |
186 | (sb->layout>>8)&255); | |
265e0f17 | 187 | } |
4b1ac34b NB |
188 | switch(sb->level) { |
189 | case 0: | |
190 | case 4: | |
191 | case 5: | |
192 | printf(" Chunk Size : %dK\n", sb->chunk_size/1024); | |
193 | break; | |
194 | case -1: | |
195 | printf(" Rounding : %dK\n", sb->chunk_size/1024); | |
196 | break; | |
353632d9 | 197 | default: break; |
4b1ac34b NB |
198 | } |
199 | printf("\n"); | |
200 | printf(" Number Major Minor RaidDevice State\n"); | |
201 | for (d= -1; d<(signed int)(sb->raid_disks+sb->spare_disks); d++) { | |
202 | mdp_disk_t *dp; | |
203 | char *dv; | |
204 | char nb[5]; | |
dfd4d8ee | 205 | int wonly; |
4b1ac34b NB |
206 | if (d>=0) dp = &sb->disks[d]; |
207 | else dp = &sb->this_disk; | |
8f23b0b3 | 208 | snprintf(nb, sizeof(nb), "%4d", d); |
4b1ac34b NB |
209 | printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb, |
210 | dp->number, dp->major, dp->minor, dp->raid_disk); | |
dfd4d8ee NB |
211 | wonly = dp->state & (1<<MD_DISK_WRITEMOSTLY); |
212 | dp->state &= ~(1<<MD_DISK_WRITEMOSTLY); | |
4b1ac34b NB |
213 | if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty"); |
214 | if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active"); | |
215 | if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync"); | |
216 | if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed"); | |
dfd4d8ee | 217 | if (wonly) printf(" write-mostly"); |
4b1ac34b | 218 | if (dp->state == 0) printf(" spare"); |
16c6fa80 | 219 | if ((dv=map_dev(dp->major, dp->minor, 0))) |
4b1ac34b NB |
220 | printf(" %s", dv); |
221 | printf("\n"); | |
222 | if (d == -1) printf("\n"); | |
223 | } | |
224 | } | |
225 | ||
f9ce90ba | 226 | static void brief_examine_super0(void *sbv) |
4b1ac34b NB |
227 | { |
228 | mdp_super_t *sb = sbv; | |
229 | char *c=map_num(pers, sb->level); | |
230 | ||
231 | printf("ARRAY %s level=%s num-devices=%d UUID=", | |
232 | get_md_name(sb->md_minor), | |
233 | c?c:"-unknown-", sb->raid_disks); | |
234 | if (sb->minor_version >= 90) | |
235 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
236 | sb->set_uuid2, sb->set_uuid3); | |
237 | else | |
238 | printf("%08x", sb->set_uuid0); | |
239 | printf("\n"); | |
240 | } | |
241 | ||
b6750aa8 | 242 | static void detail_super0(void *sbv, char *homehost) |
4b1ac34b NB |
243 | { |
244 | mdp_super_t *sb = sbv; | |
245 | printf(" UUID : "); | |
246 | if (sb->minor_version >= 90) | |
247 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
248 | sb->set_uuid2, sb->set_uuid3); | |
249 | else | |
250 | printf("%08x", sb->set_uuid0); | |
b6750aa8 NB |
251 | if (homehost) { |
252 | unsigned char *hash = SHA1((unsigned char *)homehost, | |
253 | strlen(homehost), | |
254 | NULL); | |
255 | if (memcmp(&sb->set_uuid2, hash, 8)==0) | |
256 | printf(" (local to host %s)", homehost); | |
257 | } | |
4b1ac34b NB |
258 | printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo); |
259 | } | |
260 | ||
f9ce90ba | 261 | static void brief_detail_super0(void *sbv) |
4b1ac34b NB |
262 | { |
263 | mdp_super_t *sb = sbv; | |
264 | printf(" UUID="); | |
265 | if (sb->minor_version >= 90) | |
266 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
267 | sb->set_uuid2, sb->set_uuid3); | |
268 | else | |
269 | printf("%08x", sb->set_uuid0); | |
270 | } | |
c7654afc | 271 | #endif |
f9ce90ba | 272 | static void uuid_from_super0(int uuid[4], void * sbv) |
4b1ac34b NB |
273 | { |
274 | mdp_super_t *super = sbv; | |
275 | uuid[0] = super->set_uuid0; | |
276 | if (super->minor_version >= 90) { | |
277 | uuid[1] = super->set_uuid1; | |
278 | uuid[2] = super->set_uuid2; | |
279 | uuid[3] = super->set_uuid3; | |
280 | } else { | |
281 | uuid[1] = 0; | |
282 | uuid[2] = 0; | |
283 | uuid[3] = 0; | |
284 | } | |
285 | } | |
286 | ||
31317663 | 287 | static void getinfo_super0(struct mdinfo *info, void *sbv) |
4b1ac34b NB |
288 | { |
289 | mdp_super_t *sb = sbv; | |
290 | int working = 0; | |
291 | int i; | |
292 | ||
293 | info->array.major_version = sb->major_version; | |
294 | info->array.minor_version = sb->minor_version; | |
295 | info->array.patch_version = sb->patch_version; | |
296 | info->array.raid_disks = sb->raid_disks; | |
297 | info->array.level = sb->level; | |
265e0f17 | 298 | info->array.layout = sb->layout; |
4b1ac34b NB |
299 | info->array.md_minor = sb->md_minor; |
300 | info->array.ctime = sb->ctime; | |
353632d9 NB |
301 | info->array.utime = sb->utime; |
302 | info->array.chunk_size = sb->chunk_size; | |
303 | info->component_size = sb->size*2; | |
4b1ac34b NB |
304 | |
305 | info->disk.state = sb->this_disk.state; | |
306 | info->disk.major = sb->this_disk.major; | |
307 | info->disk.minor = sb->this_disk.minor; | |
308 | info->disk.raid_disk = sb->this_disk.raid_disk; | |
fbf8a0b7 | 309 | info->disk.number = sb->this_disk.number; |
4b1ac34b NB |
310 | |
311 | info->events = md_event(sb); | |
353632d9 | 312 | info->data_offset = 0; |
4b1ac34b NB |
313 | |
314 | uuid_from_super0(info->uuid, sbv); | |
947fd4dd | 315 | |
353632d9 NB |
316 | if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) { |
317 | info->reshape_active = 1; | |
318 | info->reshape_progress = sb->reshape_position; | |
319 | info->new_level = sb->new_level; | |
320 | info->delta_disks = sb->delta_disks; | |
321 | info->new_layout = sb->new_layout; | |
322 | info->new_chunk = sb->new_chunk; | |
323 | } else | |
324 | info->reshape_active = 0; | |
325 | ||
31317663 | 326 | info->name[0] = 0; |
4b1ac34b NB |
327 | /* work_disks is calculated rather than read directly */ |
328 | for (i=0; i < MD_SB_DISKS; i++) | |
329 | if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) && | |
330 | (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) && | |
331 | !(sb->disks[i].state & (1<<MD_DISK_FAULTY))) | |
332 | working ++; | |
333 | info->array.working_disks = working; | |
334 | } | |
335 | ||
336 | ||
e5eac01f NB |
337 | static int update_super0(struct mdinfo *info, void *sbv, char *update, |
338 | char *devname, int verbose, | |
339 | int uuid_set, char *homehost) | |
4b1ac34b | 340 | { |
c4d831e1 NB |
341 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. |
342 | * For others, the return value is ignored. | |
343 | */ | |
4b1ac34b NB |
344 | int rv = 0; |
345 | mdp_super_t *sb = sbv; | |
346 | if (strcmp(update, "sparc2.2")==0 ) { | |
347 | /* 2.2 sparc put the events in the wrong place | |
348 | * So we copy the tail of the superblock | |
349 | * up 4 bytes before continuing | |
350 | */ | |
351 | __u32 *sb32 = (__u32*)sb; | |
352 | memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, | |
353 | sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1, | |
354 | (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4); | |
dab6685f NB |
355 | if (verbose >= 0) |
356 | fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n", | |
357 | devname); | |
4b1ac34b NB |
358 | } |
359 | if (strcmp(update, "super-minor") ==0) { | |
360 | sb->md_minor = info->array.md_minor; | |
dab6685f | 361 | if (verbose > 0) |
4b1ac34b NB |
362 | fprintf(stderr, Name ": updating superblock of %s with minor number %d\n", |
363 | devname, info->array.md_minor); | |
364 | } | |
365 | if (strcmp(update, "summaries") == 0) { | |
366 | int i; | |
367 | /* set nr_disks, active_disks, working_disks, | |
368 | * failed_disks, spare_disks based on disks[] | |
369 | * array in superblock. | |
370 | * Also make sure extra slots aren't 'failed' | |
371 | */ | |
372 | sb->nr_disks = sb->active_disks = | |
373 | sb->working_disks = sb->failed_disks = | |
374 | sb->spare_disks = 0; | |
375 | for (i=0; i < MD_SB_DISKS ; i++) | |
376 | if (sb->disks[i].major || | |
377 | sb->disks[i].minor) { | |
378 | int state = sb->disks[i].state; | |
379 | if (state & (1<<MD_DISK_REMOVED)) | |
380 | continue; | |
381 | sb->nr_disks++; | |
382 | if (state & (1<<MD_DISK_ACTIVE)) | |
383 | sb->active_disks++; | |
384 | if (state & (1<<MD_DISK_FAULTY)) | |
385 | sb->failed_disks++; | |
386 | else | |
387 | sb->working_disks++; | |
388 | if (state == 0) | |
389 | sb->spare_disks++; | |
390 | } else if (i >= sb->raid_disks && sb->disks[i].number == 0) | |
391 | sb->disks[i].state = 0; | |
392 | } | |
393 | if (strcmp(update, "force")==0) { | |
c4d831e1 | 394 | __u32 ehi = sb->events_hi, elo = sb->events_lo; |
4b1ac34b NB |
395 | sb->events_hi = (info->events>>32) & 0xFFFFFFFF; |
396 | sb->events_lo = (info->events) & 0xFFFFFFFF; | |
c4d831e1 NB |
397 | if (sb->events_hi != ehi || |
398 | sb->events_lo != elo) | |
399 | rv = 1; | |
400 | if ((sb->level == 5 || sb->level == 4 || sb->level == 6) && | |
401 | (sb->state & (1 << MD_SB_CLEAN)) == 0) { | |
4b1ac34b NB |
402 | /* need to force clean */ |
403 | sb->state |= (1 << MD_SB_CLEAN); | |
c4d831e1 NB |
404 | rv = 1; |
405 | } | |
4b1ac34b NB |
406 | } |
407 | if (strcmp(update, "assemble")==0) { | |
408 | int d = info->disk.number; | |
dfd4d8ee | 409 | int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY); |
c4d831e1 NB |
410 | if ((sb->disks[d].state & ~(1<<MD_DISK_WRITEMOSTLY)) |
411 | != info->disk.state) { | |
412 | sb->disks[d].state = info->disk.state | wonly; | |
4b1ac34b NB |
413 | rv = 1; |
414 | } | |
415 | } | |
416 | if (strcmp(update, "newdev") == 0) { | |
417 | int d = info->disk.number; | |
418 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
419 | sb->disks[d].number = d; | |
420 | sb->disks[d].major = info->disk.major; | |
421 | sb->disks[d].minor = info->disk.minor; | |
422 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
423 | sb->disks[d].state = info->disk.state; | |
424 | sb->this_disk = sb->disks[d]; | |
425 | } | |
426 | if (strcmp(update, "grow") == 0) { | |
427 | sb->raid_disks = info->array.raid_disks; | |
428 | sb->nr_disks = info->array.nr_disks; | |
429 | sb->active_disks = info->array.active_disks; | |
430 | sb->working_disks = info->array.working_disks; | |
431 | memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0])); | |
432 | sb->disks[info->disk.number].number = info->disk.number; | |
433 | sb->disks[info->disk.number].major = info->disk.major; | |
434 | sb->disks[info->disk.number].minor = info->disk.minor; | |
435 | sb->disks[info->disk.number].raid_disk = info->disk.raid_disk; | |
436 | sb->disks[info->disk.number].state = info->disk.state; | |
437 | if (sb->this_disk.number == info->disk.number) | |
438 | sb->this_disk = sb->disks[info->disk.number]; | |
439 | } | |
440 | if (strcmp(update, "resync") == 0) { | |
441 | /* make sure resync happens */ | |
442 | sb->state &= ~(1<<MD_SB_CLEAN); | |
443 | sb->recovery_cp = 0; | |
444 | } | |
7d99579f | 445 | if (strcmp(update, "uuid") == 0) { |
e5eac01f NB |
446 | if (!uuid_set && homehost) { |
447 | unsigned char *hash = SHA1((unsigned char*)homehost, | |
448 | strlen(homehost), | |
449 | NULL); | |
450 | memcpy(info->uuid+2, hash, 8); | |
451 | } | |
7d99579f NB |
452 | sb->set_uuid0 = info->uuid[0]; |
453 | sb->set_uuid1 = info->uuid[1]; | |
454 | sb->set_uuid2 = info->uuid[2]; | |
455 | sb->set_uuid3 = info->uuid[3]; | |
14263cf1 NB |
456 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) { |
457 | struct bitmap_super_s *bm; | |
458 | bm = (struct bitmap_super_s*)(sb+1); | |
459 | uuid_from_super0((int*)bm->uuid, sbv); | |
460 | } | |
7d99579f | 461 | } |
353632d9 NB |
462 | if (strcmp(update, "_reshape_progress")==0) |
463 | sb->reshape_position = info->reshape_progress; | |
4b1ac34b NB |
464 | |
465 | sb->sb_csum = calc_sb0_csum(sb); | |
466 | return rv; | |
467 | } | |
468 | ||
f9ce90ba | 469 | static __u64 event_super0(void *sbv) |
4b1ac34b NB |
470 | { |
471 | mdp_super_t *sb = sbv; | |
472 | return md_event(sb); | |
473 | } | |
474 | ||
05697ec1 NB |
475 | /* |
476 | * For verion-0 superblock, the homehost is 'stored' in the | |
477 | * uuid. 8 bytes for a hash of the host leaving 8 bytes | |
478 | * of random material. | |
479 | * We use the first 8 bytes (64bits) of the sha1 of the | |
480 | * host name | |
481 | */ | |
4b1ac34b NB |
482 | |
483 | ||
05697ec1 NB |
484 | static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, |
485 | unsigned long long size, char *ignored_name, char *homehost) | |
4b1ac34b | 486 | { |
55935d51 | 487 | mdp_super_t *sb = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
82d9eba6 | 488 | int spares; |
dfe47e00 | 489 | int rfd; |
55935d51 | 490 | memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b | 491 | |
f9ce90ba NB |
492 | if (info->major_version == -1) { |
493 | /* zeroing the superblock */ | |
05697ec1 | 494 | *sbp = sb; |
82d9eba6 NB |
495 | return 0; |
496 | } | |
497 | ||
498 | spares = info->working_disks - info->active_disks; | |
499 | if (info->raid_disks + spares > MD_SB_DISKS) { | |
500 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
501 | info->raid_disks , spares, MD_SB_DISKS); | |
502 | return 0; | |
f9ce90ba NB |
503 | } |
504 | ||
dfe47e00 | 505 | rfd = open("/dev/urandom", O_RDONLY); |
4b1ac34b NB |
506 | sb->md_magic = MD_SB_MAGIC; |
507 | sb->major_version = 0; | |
508 | sb->minor_version = 90; | |
509 | sb->patch_version = 0; | |
510 | sb->gvalid_words = 0; /* ignored */ | |
dfe47e00 NB |
511 | if (rfd < 0 || read(rfd, &sb->set_uuid0, 4) != 4) |
512 | sb->set_uuid0 = random(); | |
4b1ac34b NB |
513 | sb->ctime = time(0); |
514 | sb->level = info->level; | |
5dd497ee NB |
515 | if (size != info->size) |
516 | return 0; | |
4b1ac34b NB |
517 | sb->size = info->size; |
518 | sb->nr_disks = info->nr_disks; | |
519 | sb->raid_disks = info->raid_disks; | |
520 | sb->md_minor = info->md_minor; | |
521 | sb->not_persistent = 0; | |
dfe47e00 NB |
522 | if (rfd < 0 || read(rfd, &sb->set_uuid1, 12) != 12) { |
523 | sb->set_uuid1 = random(); | |
524 | sb->set_uuid2 = random(); | |
525 | sb->set_uuid3 = random(); | |
526 | } | |
527 | if (rfd >= 0) | |
528 | close(rfd); | |
05697ec1 NB |
529 | if (homehost) { |
530 | unsigned char *hash = SHA1((unsigned char*)homehost, | |
531 | strlen(homehost), | |
532 | NULL); | |
533 | memcpy(&sb->set_uuid2, hash, 8); | |
534 | } | |
4b1ac34b NB |
535 | |
536 | sb->utime = sb->ctime; | |
537 | sb->state = info->state; | |
538 | sb->active_disks = info->active_disks; | |
539 | sb->working_disks = info->working_disks; | |
540 | sb->failed_disks = info->failed_disks; | |
234a131a | 541 | sb->spare_disks = info->spare_disks; |
4b1ac34b NB |
542 | sb->events_hi = 0; |
543 | sb->events_lo = 1; | |
544 | ||
545 | sb->layout = info->layout; | |
546 | sb->chunk_size = info->chunk_size; | |
547 | ||
548 | *sbp = sb; | |
82d9eba6 | 549 | return 1; |
4b1ac34b NB |
550 | } |
551 | ||
552 | /* Add a device to the superblock being created */ | |
f9ce90ba | 553 | static void add_to_super0(void *sbv, mdu_disk_info_t *dinfo) |
4b1ac34b NB |
554 | { |
555 | mdp_super_t *sb = sbv; | |
556 | mdp_disk_t *dk = &sb->disks[dinfo->number]; | |
353632d9 | 557 | |
4b1ac34b NB |
558 | dk->number = dinfo->number; |
559 | dk->major = dinfo->major; | |
560 | dk->minor = dinfo->minor; | |
561 | dk->raid_disk = dinfo->raid_disk; | |
562 | dk->state = dinfo->state; | |
563 | } | |
564 | ||
96395475 | 565 | static int store_super0(struct supertype *st, int fd, void *sbv) |
4b1ac34b NB |
566 | { |
567 | unsigned long size; | |
568 | unsigned long long dsize; | |
569 | unsigned long long offset; | |
f9ce90ba | 570 | mdp_super_t *super = sbv; |
4b1ac34b NB |
571 | |
572 | #ifdef BLKGETSIZE64 | |
573 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
574 | #endif | |
575 | { | |
576 | if (ioctl(fd, BLKGETSIZE, &size)) | |
577 | return 1; | |
578 | else | |
579 | dsize = ((unsigned long long)size)<<9; | |
580 | } | |
581 | ||
5dd497ee | 582 | if (dsize < MD_RESERVED_SECTORS*2*512) |
4b1ac34b | 583 | return 2; |
353632d9 | 584 | |
4b1ac34b NB |
585 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
586 | ||
587 | offset *= 512; | |
588 | ||
589 | if (lseek64(fd, offset, 0)< 0LL) | |
590 | return 3; | |
591 | ||
592 | if (write(fd, super, sizeof(*super)) != sizeof(*super)) | |
593 | return 4; | |
594 | ||
14263cf1 NB |
595 | if (super->state & (1<<MD_SB_BITMAP_PRESENT)) { |
596 | struct bitmap_super_s * bm = (struct bitmap_super_s*)(super+1); | |
597 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) | |
598 | write(fd, bm, sizeof(*bm)); | |
599 | } | |
600 | ||
570c0542 | 601 | fsync(fd); |
4b1ac34b NB |
602 | return 0; |
603 | } | |
604 | ||
1bf4e2d9 | 605 | static int write_init_super0(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname) |
4b1ac34b NB |
606 | { |
607 | mdp_super_t *sb = sbv; | |
dfd4d8ee | 608 | int fd = open(devname, O_RDWR|O_EXCL); |
4b1ac34b NB |
609 | int rv; |
610 | ||
611 | if (fd < 0) { | |
612 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", devname); | |
613 | return -1; | |
614 | } | |
615 | ||
8d75b7fc NB |
616 | sb->disks[dinfo->number].state &= ~(1<<MD_DISK_FAULTY); |
617 | sb->disks[dinfo->number].state |= (1<<MD_DISK_SYNC); | |
618 | ||
4b1ac34b NB |
619 | sb->this_disk = sb->disks[dinfo->number]; |
620 | sb->sb_csum = calc_sb0_csum(sb); | |
96395475 | 621 | rv = store_super0(st, fd, sb); |
55935d51 | 622 | |
1bf4e2d9 NB |
623 | if (rv == 0 && (sb->state & (1<<MD_SB_BITMAP_PRESENT))) |
624 | rv = st->ss->write_bitmap(st, fd, sbv); | |
55935d51 | 625 | |
4b1ac34b NB |
626 | close(fd); |
627 | if (rv) | |
628 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
629 | return rv; | |
630 | } | |
631 | ||
f9ce90ba | 632 | static int compare_super0(void **firstp, void *secondv) |
4b1ac34b NB |
633 | { |
634 | /* | |
635 | * return: | |
636 | * 0 same, or first was empty, and second was copied | |
637 | * 1 second had wrong number | |
638 | * 2 wrong uuid | |
639 | * 3 wrong other info | |
640 | */ | |
641 | mdp_super_t *first = *firstp; | |
642 | mdp_super_t *second = secondv; | |
643 | ||
644 | int uuid1[4], uuid2[4]; | |
645 | if (second->md_magic != MD_SB_MAGIC) | |
646 | return 1; | |
647 | if (!first) { | |
14263cf1 NB |
648 | first = malloc(MD_SB_BYTES + sizeof(struct bitmap_super_s)); |
649 | memcpy(first, second, MD_SB_BYTES + sizeof(struct bitmap_super_s)); | |
4b1ac34b NB |
650 | *firstp = first; |
651 | return 0; | |
652 | } | |
653 | ||
654 | uuid_from_super0(uuid1, first); | |
655 | uuid_from_super0(uuid2, second); | |
f277ce36 | 656 | if (!same_uuid(uuid1, uuid2, 0)) |
4b1ac34b NB |
657 | return 2; |
658 | if (first->major_version != second->major_version || | |
659 | first->minor_version != second->minor_version || | |
660 | first->patch_version != second->patch_version || | |
661 | first->gvalid_words != second->gvalid_words || | |
662 | first->ctime != second->ctime || | |
663 | first->level != second->level || | |
664 | first->size != second->size || | |
665 | first->raid_disks != second->raid_disks ) | |
666 | return 3; | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
671 | ||
82d9eba6 | 672 | static int load_super0(struct supertype *st, int fd, void **sbp, char *devname) |
4b1ac34b NB |
673 | { |
674 | /* try to read in the superblock | |
675 | * Return: | |
676 | * 0 on success | |
677 | * 1 on cannot get superblock | |
678 | * 2 on superblock meaningless | |
679 | */ | |
680 | unsigned long size; | |
681 | unsigned long long dsize; | |
682 | unsigned long long offset; | |
683 | mdp_super_t *super; | |
14263cf1 NB |
684 | int uuid[4]; |
685 | struct bitmap_super_s *bsb; | |
4b1ac34b NB |
686 | |
687 | #ifdef BLKGETSIZE64 | |
688 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
689 | #endif | |
690 | { | |
691 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
692 | if (devname) | |
693 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
694 | devname, strerror(errno)); | |
695 | return 1; | |
696 | } else | |
697 | dsize = size << 9; | |
698 | } | |
699 | ||
700 | if (dsize < MD_RESERVED_SECTORS*2) { | |
701 | if (devname) | |
702 | fprintf(stderr, Name ": %s is too small for md: size is %ld sectors.\n", | |
703 | devname, size); | |
704 | return 1; | |
705 | } | |
353632d9 | 706 | |
4b1ac34b NB |
707 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
708 | ||
709 | offset *= 512; | |
710 | ||
711 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
712 | ||
713 | if (lseek64(fd, offset, 0)< 0LL) { | |
714 | if (devname) | |
715 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
716 | devname, strerror(errno)); | |
717 | return 1; | |
718 | } | |
719 | ||
8d75b7fc | 720 | super = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b NB |
721 | |
722 | if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) { | |
723 | if (devname) | |
724 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
725 | devname); | |
726 | free(super); | |
727 | return 1; | |
728 | } | |
729 | ||
586ed405 NB |
730 | if (st->ss && st->minor_version == 9) |
731 | super0_swap_endian(super); | |
732 | ||
4b1ac34b NB |
733 | if (super->md_magic != MD_SB_MAGIC) { |
734 | if (devname) | |
735 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
736 | devname, MD_SB_MAGIC, super->md_magic); | |
737 | free(super); | |
738 | return 2; | |
739 | } | |
740 | ||
741 | if (super->major_version != 0) { | |
742 | if (devname) | |
743 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
744 | devname, super->major_version); | |
745 | free(super); | |
746 | return 2; | |
747 | } | |
748 | *sbp = super; | |
82d9eba6 NB |
749 | if (st->ss == NULL) { |
750 | st->ss = &super0; | |
751 | st->minor_version = 90; | |
ea329559 | 752 | st->max_devs = MD_SB_DISKS; |
82d9eba6 NB |
753 | } |
754 | ||
14263cf1 NB |
755 | /* Now check on the bitmap superblock */ |
756 | if ((super->state & (1<<MD_SB_BITMAP_PRESENT)) == 0) | |
757 | return 0; | |
758 | /* Read the bitmap superblock and make sure it looks | |
759 | * valid. If it doesn't clear the bit. An --assemble --force | |
760 | * should get that written out. | |
761 | */ | |
762 | if (read(fd, super+1, sizeof(struct bitmap_super_s)) | |
763 | != sizeof(struct bitmap_super_s)) | |
764 | goto no_bitmap; | |
765 | ||
766 | uuid_from_super0(uuid, super); | |
767 | bsb = (struct bitmap_super_s *)(super+1); | |
768 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
769 | memcmp(bsb->uuid, uuid, 16) != 0) | |
770 | goto no_bitmap; | |
771 | return 0; | |
772 | ||
773 | no_bitmap: | |
774 | super->state &= ~(1<<MD_SB_BITMAP_PRESENT); | |
775 | ||
4b1ac34b NB |
776 | return 0; |
777 | } | |
f9ce90ba | 778 | |
82d9eba6 | 779 | static struct supertype *match_metadata_desc0(char *arg) |
f9ce90ba | 780 | { |
82d9eba6 NB |
781 | struct supertype *st = malloc(sizeof(*st)); |
782 | if (!st) return st; | |
783 | ||
784 | st->ss = &super0; | |
785 | st->minor_version = 90; | |
ea329559 | 786 | st->max_devs = MD_SB_DISKS; |
f9ce90ba NB |
787 | if (strcmp(arg, "0") == 0 || |
788 | strcmp(arg, "0.90") == 0 || | |
789 | strcmp(arg, "default") == 0 | |
790 | ) | |
82d9eba6 NB |
791 | return st; |
792 | ||
586ed405 NB |
793 | st->minor_version = 9; /* flag for 'byte-swapped' */ |
794 | if (strcmp(arg, "0.swap")==0) | |
795 | return st; | |
796 | ||
82d9eba6 NB |
797 | free(st); |
798 | return NULL; | |
799 | } | |
800 | ||
1bf4e2d9 | 801 | static __u64 avail_size0(struct supertype *st, __u64 devsize) |
82d9eba6 NB |
802 | { |
803 | if (devsize < MD_RESERVED_SECTORS*2) | |
804 | return 0ULL; | |
805 | return MD_NEW_SIZE_SECTORS(devsize); | |
f9ce90ba NB |
806 | } |
807 | ||
f9c25f1d | 808 | static int add_internal_bitmap0(struct supertype *st, void *sbv, int chunk, int delay, int write_behind, unsigned long long size, int may_change, int major) |
55935d51 NB |
809 | { |
810 | /* | |
811 | * The bitmap comes immediately after the superblock and must be 60K in size | |
812 | * at most. The default size is between 30K and 60K | |
813 | * | |
8686f3ed | 814 | * size is in sectors, chunk is in bytes !!! |
55935d51 | 815 | */ |
1bf4e2d9 | 816 | unsigned long long bits; |
55935d51 NB |
817 | unsigned long long max_bits = 60*1024*8; |
818 | unsigned long long min_chunk; | |
819 | mdp_super_t *sb = sbv; | |
820 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES); | |
821 | ||
353632d9 | 822 | |
f277ce36 | 823 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ |
8686f3ed | 824 | bits = (size * 512) / min_chunk + 1; |
55935d51 NB |
825 | while (bits > max_bits) { |
826 | min_chunk *= 2; | |
827 | bits = (bits+1)/2; | |
828 | } | |
829 | if (chunk == UnSet) | |
830 | chunk = min_chunk; | |
831 | else if (chunk < min_chunk) | |
832 | return 0; /* chunk size too small */ | |
833 | ||
834 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); | |
835 | ||
29e766a5 | 836 | memset(bms, 0, sizeof(*bms)); |
dfd4d8ee | 837 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
dcec9ee5 | 838 | bms->version = __cpu_to_le32(major); |
55935d51 | 839 | uuid_from_super0((int*)bms->uuid, sb); |
dfd4d8ee NB |
840 | bms->chunksize = __cpu_to_le32(chunk); |
841 | bms->daemon_sleep = __cpu_to_le32(delay); | |
f9c25f1d | 842 | bms->sync_size = __cpu_to_le64(size); |
dfd4d8ee | 843 | bms->write_behind = __cpu_to_le32(write_behind); |
55935d51 | 844 | |
55935d51 NB |
845 | return 1; |
846 | } | |
353632d9 | 847 | |
55935d51 | 848 | |
f6d75de8 | 849 | void locate_bitmap0(struct supertype *st, int fd, void *sbv) |
55935d51 NB |
850 | { |
851 | unsigned long long dsize; | |
852 | unsigned long size; | |
853 | unsigned long long offset; | |
854 | #ifdef BLKGETSIZE64 | |
855 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
856 | #endif | |
857 | { | |
858 | if (ioctl(fd, BLKGETSIZE, &size)) | |
859 | return; | |
860 | else | |
861 | dsize = ((unsigned long long)size)<<9; | |
862 | } | |
863 | ||
864 | if (dsize < MD_RESERVED_SECTORS*2) | |
865 | return; | |
353632d9 | 866 | |
55935d51 NB |
867 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
868 | ||
869 | offset *= 512; | |
870 | ||
871 | offset += MD_SB_BYTES; | |
872 | ||
873 | lseek64(fd, offset, 0); | |
874 | } | |
875 | ||
8d75b7fc NB |
876 | int write_bitmap0(struct supertype *st, int fd, void *sbv) |
877 | { | |
878 | unsigned long size; | |
879 | unsigned long long dsize; | |
880 | unsigned long long offset; | |
881 | mdp_super_t *sb = sbv; | |
882 | ||
883 | int rv = 0; | |
884 | ||
885 | int towrite, n; | |
886 | char buf[4096]; | |
887 | ||
888 | #ifdef BLKGETSIZE64 | |
889 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
890 | #endif | |
891 | { | |
892 | if (ioctl(fd, BLKGETSIZE, &size)) | |
893 | return 1; | |
894 | else | |
895 | dsize = ((unsigned long long)size)<<9; | |
896 | } | |
897 | ||
898 | if (dsize < MD_RESERVED_SECTORS*2) | |
353632d9 NB |
899 | return -1; |
900 | ||
8d75b7fc NB |
901 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
902 | ||
903 | offset *= 512; | |
904 | ||
905 | if (lseek64(fd, offset + 4096, 0)< 0LL) | |
906 | return 3; | |
907 | ||
908 | ||
1e0d770c NB |
909 | if (write(fd, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t)) != |
910 | sizeof(bitmap_super_t)) | |
911 | return -2; | |
8d75b7fc NB |
912 | towrite = 64*1024 - MD_SB_BYTES - sizeof(bitmap_super_t); |
913 | memset(buf, 0xff, sizeof(buf)); | |
914 | while (towrite > 0) { | |
915 | n = towrite; | |
916 | if (n > sizeof(buf)) | |
917 | n = sizeof(buf); | |
918 | n = write(fd, buf, n); | |
919 | if (n > 0) | |
920 | towrite -= n; | |
921 | else | |
922 | break; | |
923 | } | |
dfd4d8ee | 924 | fsync(fd); |
8d75b7fc NB |
925 | if (towrite) |
926 | rv = -2; | |
927 | ||
928 | return rv; | |
929 | } | |
55935d51 | 930 | |
f9ce90ba | 931 | struct superswitch super0 = { |
c7654afc | 932 | #ifndef MDASSEMBLE |
f9ce90ba NB |
933 | .examine_super = examine_super0, |
934 | .brief_examine_super = brief_examine_super0, | |
935 | .detail_super = detail_super0, | |
936 | .brief_detail_super = brief_detail_super0, | |
c7654afc | 937 | #endif |
f9ce90ba NB |
938 | .uuid_from_super = uuid_from_super0, |
939 | .getinfo_super = getinfo_super0, | |
940 | .update_super = update_super0, | |
941 | .event_super = event_super0, | |
942 | .init_super = init_super0, | |
943 | .add_to_super = add_to_super0, | |
944 | .store_super = store_super0, | |
945 | .write_init_super = write_init_super0, | |
946 | .compare_super = compare_super0, | |
947 | .load_super = load_super0, | |
948 | .match_metadata_desc = match_metadata_desc0, | |
82d9eba6 | 949 | .avail_size = avail_size0, |
55935d51 NB |
950 | .add_internal_bitmap = add_internal_bitmap0, |
951 | .locate_bitmap = locate_bitmap0, | |
8d75b7fc | 952 | .write_bitmap = write_bitmap0, |
82d9eba6 | 953 | .major = 0, |
f277ce36 | 954 | .swapuuid = 0, |
f9ce90ba | 955 | }; |