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