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4b1ac34b NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2004 Neil Brown <neilb@cse.unsw.edu.au> | |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
30 | #include "mdadm.h" | |
31 | ||
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 | ||
f9ce90ba | 234 | static void detail_super0(void *sbv) |
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); | |
243 | printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo); | |
244 | } | |
245 | ||
f9ce90ba | 246 | static void brief_detail_super0(void *sbv) |
4b1ac34b NB |
247 | { |
248 | mdp_super_t *sb = sbv; | |
249 | printf(" UUID="); | |
250 | if (sb->minor_version >= 90) | |
251 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
252 | sb->set_uuid2, sb->set_uuid3); | |
253 | else | |
254 | printf("%08x", sb->set_uuid0); | |
255 | } | |
c7654afc | 256 | #endif |
f9ce90ba | 257 | static void uuid_from_super0(int uuid[4], void * sbv) |
4b1ac34b NB |
258 | { |
259 | mdp_super_t *super = sbv; | |
260 | uuid[0] = super->set_uuid0; | |
261 | if (super->minor_version >= 90) { | |
262 | uuid[1] = super->set_uuid1; | |
263 | uuid[2] = super->set_uuid2; | |
264 | uuid[3] = super->set_uuid3; | |
265 | } else { | |
266 | uuid[1] = 0; | |
267 | uuid[2] = 0; | |
268 | uuid[3] = 0; | |
269 | } | |
270 | } | |
271 | ||
31317663 | 272 | static void getinfo_super0(struct mdinfo *info, void *sbv) |
4b1ac34b NB |
273 | { |
274 | mdp_super_t *sb = sbv; | |
275 | int working = 0; | |
276 | int i; | |
277 | ||
278 | info->array.major_version = sb->major_version; | |
279 | info->array.minor_version = sb->minor_version; | |
280 | info->array.patch_version = sb->patch_version; | |
281 | info->array.raid_disks = sb->raid_disks; | |
282 | info->array.level = sb->level; | |
265e0f17 | 283 | info->array.layout = sb->layout; |
4b1ac34b NB |
284 | info->array.md_minor = sb->md_minor; |
285 | info->array.ctime = sb->ctime; | |
353632d9 NB |
286 | info->array.utime = sb->utime; |
287 | info->array.chunk_size = sb->chunk_size; | |
288 | info->component_size = sb->size*2; | |
4b1ac34b NB |
289 | |
290 | info->disk.state = sb->this_disk.state; | |
291 | info->disk.major = sb->this_disk.major; | |
292 | info->disk.minor = sb->this_disk.minor; | |
293 | info->disk.raid_disk = sb->this_disk.raid_disk; | |
fbf8a0b7 | 294 | info->disk.number = sb->this_disk.number; |
4b1ac34b NB |
295 | |
296 | info->events = md_event(sb); | |
353632d9 | 297 | info->data_offset = 0; |
4b1ac34b NB |
298 | |
299 | uuid_from_super0(info->uuid, sbv); | |
947fd4dd | 300 | |
353632d9 NB |
301 | if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) { |
302 | info->reshape_active = 1; | |
303 | info->reshape_progress = sb->reshape_position; | |
304 | info->new_level = sb->new_level; | |
305 | info->delta_disks = sb->delta_disks; | |
306 | info->new_layout = sb->new_layout; | |
307 | info->new_chunk = sb->new_chunk; | |
308 | } else | |
309 | info->reshape_active = 0; | |
310 | ||
31317663 | 311 | info->name[0] = 0; |
4b1ac34b NB |
312 | /* work_disks is calculated rather than read directly */ |
313 | for (i=0; i < MD_SB_DISKS; i++) | |
314 | if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) && | |
315 | (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) && | |
316 | !(sb->disks[i].state & (1<<MD_DISK_FAULTY))) | |
317 | working ++; | |
318 | info->array.working_disks = working; | |
319 | } | |
320 | ||
321 | ||
f9ce90ba | 322 | static int update_super0(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose) |
4b1ac34b | 323 | { |
c4d831e1 NB |
324 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. |
325 | * For others, the return value is ignored. | |
326 | */ | |
4b1ac34b NB |
327 | int rv = 0; |
328 | mdp_super_t *sb = sbv; | |
329 | if (strcmp(update, "sparc2.2")==0 ) { | |
330 | /* 2.2 sparc put the events in the wrong place | |
331 | * So we copy the tail of the superblock | |
332 | * up 4 bytes before continuing | |
333 | */ | |
334 | __u32 *sb32 = (__u32*)sb; | |
335 | memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, | |
336 | sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1, | |
337 | (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4); | |
dab6685f NB |
338 | if (verbose >= 0) |
339 | fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n", | |
340 | devname); | |
4b1ac34b NB |
341 | } |
342 | if (strcmp(update, "super-minor") ==0) { | |
343 | sb->md_minor = info->array.md_minor; | |
dab6685f | 344 | if (verbose > 0) |
4b1ac34b NB |
345 | fprintf(stderr, Name ": updating superblock of %s with minor number %d\n", |
346 | devname, info->array.md_minor); | |
347 | } | |
348 | if (strcmp(update, "summaries") == 0) { | |
349 | int i; | |
350 | /* set nr_disks, active_disks, working_disks, | |
351 | * failed_disks, spare_disks based on disks[] | |
352 | * array in superblock. | |
353 | * Also make sure extra slots aren't 'failed' | |
354 | */ | |
355 | sb->nr_disks = sb->active_disks = | |
356 | sb->working_disks = sb->failed_disks = | |
357 | sb->spare_disks = 0; | |
358 | for (i=0; i < MD_SB_DISKS ; i++) | |
359 | if (sb->disks[i].major || | |
360 | sb->disks[i].minor) { | |
361 | int state = sb->disks[i].state; | |
362 | if (state & (1<<MD_DISK_REMOVED)) | |
363 | continue; | |
364 | sb->nr_disks++; | |
365 | if (state & (1<<MD_DISK_ACTIVE)) | |
366 | sb->active_disks++; | |
367 | if (state & (1<<MD_DISK_FAULTY)) | |
368 | sb->failed_disks++; | |
369 | else | |
370 | sb->working_disks++; | |
371 | if (state == 0) | |
372 | sb->spare_disks++; | |
373 | } else if (i >= sb->raid_disks && sb->disks[i].number == 0) | |
374 | sb->disks[i].state = 0; | |
375 | } | |
376 | if (strcmp(update, "force")==0) { | |
c4d831e1 | 377 | __u32 ehi = sb->events_hi, elo = sb->events_lo; |
4b1ac34b NB |
378 | sb->events_hi = (info->events>>32) & 0xFFFFFFFF; |
379 | sb->events_lo = (info->events) & 0xFFFFFFFF; | |
c4d831e1 NB |
380 | if (sb->events_hi != ehi || |
381 | sb->events_lo != elo) | |
382 | rv = 1; | |
383 | if ((sb->level == 5 || sb->level == 4 || sb->level == 6) && | |
384 | (sb->state & (1 << MD_SB_CLEAN)) == 0) { | |
4b1ac34b NB |
385 | /* need to force clean */ |
386 | sb->state |= (1 << MD_SB_CLEAN); | |
c4d831e1 NB |
387 | rv = 1; |
388 | } | |
4b1ac34b NB |
389 | } |
390 | if (strcmp(update, "assemble")==0) { | |
391 | int d = info->disk.number; | |
dfd4d8ee | 392 | int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY); |
c4d831e1 NB |
393 | if ((sb->disks[d].state & ~(1<<MD_DISK_WRITEMOSTLY)) |
394 | != info->disk.state) { | |
395 | sb->disks[d].state = info->disk.state | wonly; | |
4b1ac34b NB |
396 | rv = 1; |
397 | } | |
398 | } | |
399 | if (strcmp(update, "newdev") == 0) { | |
400 | int d = info->disk.number; | |
401 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
402 | sb->disks[d].number = d; | |
403 | sb->disks[d].major = info->disk.major; | |
404 | sb->disks[d].minor = info->disk.minor; | |
405 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
406 | sb->disks[d].state = info->disk.state; | |
407 | sb->this_disk = sb->disks[d]; | |
408 | } | |
409 | if (strcmp(update, "grow") == 0) { | |
410 | sb->raid_disks = info->array.raid_disks; | |
411 | sb->nr_disks = info->array.nr_disks; | |
412 | sb->active_disks = info->array.active_disks; | |
413 | sb->working_disks = info->array.working_disks; | |
414 | memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0])); | |
415 | sb->disks[info->disk.number].number = info->disk.number; | |
416 | sb->disks[info->disk.number].major = info->disk.major; | |
417 | sb->disks[info->disk.number].minor = info->disk.minor; | |
418 | sb->disks[info->disk.number].raid_disk = info->disk.raid_disk; | |
419 | sb->disks[info->disk.number].state = info->disk.state; | |
420 | if (sb->this_disk.number == info->disk.number) | |
421 | sb->this_disk = sb->disks[info->disk.number]; | |
422 | } | |
423 | if (strcmp(update, "resync") == 0) { | |
424 | /* make sure resync happens */ | |
425 | sb->state &= ~(1<<MD_SB_CLEAN); | |
426 | sb->recovery_cp = 0; | |
427 | } | |
7d99579f NB |
428 | if (strcmp(update, "uuid") == 0) { |
429 | sb->set_uuid0 = info->uuid[0]; | |
430 | sb->set_uuid1 = info->uuid[1]; | |
431 | sb->set_uuid2 = info->uuid[2]; | |
432 | sb->set_uuid3 = info->uuid[3]; | |
433 | } | |
353632d9 NB |
434 | if (strcmp(update, "_reshape_progress")==0) |
435 | sb->reshape_position = info->reshape_progress; | |
4b1ac34b NB |
436 | |
437 | sb->sb_csum = calc_sb0_csum(sb); | |
438 | return rv; | |
439 | } | |
440 | ||
f9ce90ba | 441 | static __u64 event_super0(void *sbv) |
4b1ac34b NB |
442 | { |
443 | mdp_super_t *sb = sbv; | |
444 | return md_event(sb); | |
445 | } | |
446 | ||
447 | ||
448 | ||
5dd497ee | 449 | static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *ignored_name) |
4b1ac34b | 450 | { |
55935d51 | 451 | mdp_super_t *sb = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
82d9eba6 | 452 | int spares; |
dfe47e00 | 453 | int rfd; |
55935d51 | 454 | memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b | 455 | |
f9ce90ba NB |
456 | if (info->major_version == -1) { |
457 | /* zeroing the superblock */ | |
82d9eba6 NB |
458 | return 0; |
459 | } | |
460 | ||
461 | spares = info->working_disks - info->active_disks; | |
462 | if (info->raid_disks + spares > MD_SB_DISKS) { | |
463 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
464 | info->raid_disks , spares, MD_SB_DISKS); | |
465 | return 0; | |
f9ce90ba NB |
466 | } |
467 | ||
dfe47e00 | 468 | rfd = open("/dev/urandom", O_RDONLY); |
4b1ac34b NB |
469 | sb->md_magic = MD_SB_MAGIC; |
470 | sb->major_version = 0; | |
471 | sb->minor_version = 90; | |
472 | sb->patch_version = 0; | |
473 | sb->gvalid_words = 0; /* ignored */ | |
dfe47e00 NB |
474 | if (rfd < 0 || read(rfd, &sb->set_uuid0, 4) != 4) |
475 | sb->set_uuid0 = random(); | |
4b1ac34b NB |
476 | sb->ctime = time(0); |
477 | sb->level = info->level; | |
5dd497ee NB |
478 | if (size != info->size) |
479 | return 0; | |
4b1ac34b NB |
480 | sb->size = info->size; |
481 | sb->nr_disks = info->nr_disks; | |
482 | sb->raid_disks = info->raid_disks; | |
483 | sb->md_minor = info->md_minor; | |
484 | sb->not_persistent = 0; | |
dfe47e00 NB |
485 | if (rfd < 0 || read(rfd, &sb->set_uuid1, 12) != 12) { |
486 | sb->set_uuid1 = random(); | |
487 | sb->set_uuid2 = random(); | |
488 | sb->set_uuid3 = random(); | |
489 | } | |
490 | if (rfd >= 0) | |
491 | close(rfd); | |
4b1ac34b NB |
492 | |
493 | sb->utime = sb->ctime; | |
494 | sb->state = info->state; | |
495 | sb->active_disks = info->active_disks; | |
496 | sb->working_disks = info->working_disks; | |
497 | sb->failed_disks = info->failed_disks; | |
234a131a | 498 | sb->spare_disks = info->spare_disks; |
4b1ac34b NB |
499 | sb->events_hi = 0; |
500 | sb->events_lo = 1; | |
501 | ||
502 | sb->layout = info->layout; | |
503 | sb->chunk_size = info->chunk_size; | |
504 | ||
505 | *sbp = sb; | |
82d9eba6 | 506 | return 1; |
4b1ac34b NB |
507 | } |
508 | ||
509 | /* Add a device to the superblock being created */ | |
f9ce90ba | 510 | static void add_to_super0(void *sbv, mdu_disk_info_t *dinfo) |
4b1ac34b NB |
511 | { |
512 | mdp_super_t *sb = sbv; | |
513 | mdp_disk_t *dk = &sb->disks[dinfo->number]; | |
353632d9 | 514 | |
4b1ac34b NB |
515 | dk->number = dinfo->number; |
516 | dk->major = dinfo->major; | |
517 | dk->minor = dinfo->minor; | |
518 | dk->raid_disk = dinfo->raid_disk; | |
519 | dk->state = dinfo->state; | |
520 | } | |
521 | ||
96395475 | 522 | static int store_super0(struct supertype *st, int fd, void *sbv) |
4b1ac34b NB |
523 | { |
524 | unsigned long size; | |
525 | unsigned long long dsize; | |
526 | unsigned long long offset; | |
f9ce90ba | 527 | mdp_super_t *super = sbv; |
4b1ac34b NB |
528 | |
529 | #ifdef BLKGETSIZE64 | |
530 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
531 | #endif | |
532 | { | |
533 | if (ioctl(fd, BLKGETSIZE, &size)) | |
534 | return 1; | |
535 | else | |
536 | dsize = ((unsigned long long)size)<<9; | |
537 | } | |
538 | ||
5dd497ee | 539 | if (dsize < MD_RESERVED_SECTORS*2*512) |
4b1ac34b | 540 | return 2; |
353632d9 | 541 | |
4b1ac34b NB |
542 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
543 | ||
544 | offset *= 512; | |
545 | ||
546 | if (lseek64(fd, offset, 0)< 0LL) | |
547 | return 3; | |
548 | ||
549 | if (write(fd, super, sizeof(*super)) != sizeof(*super)) | |
550 | return 4; | |
551 | ||
570c0542 | 552 | fsync(fd); |
4b1ac34b NB |
553 | return 0; |
554 | } | |
555 | ||
1bf4e2d9 | 556 | static int write_init_super0(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname) |
4b1ac34b NB |
557 | { |
558 | mdp_super_t *sb = sbv; | |
dfd4d8ee | 559 | int fd = open(devname, O_RDWR|O_EXCL); |
4b1ac34b NB |
560 | int rv; |
561 | ||
562 | if (fd < 0) { | |
563 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", devname); | |
564 | return -1; | |
565 | } | |
566 | ||
8d75b7fc NB |
567 | sb->disks[dinfo->number].state &= ~(1<<MD_DISK_FAULTY); |
568 | sb->disks[dinfo->number].state |= (1<<MD_DISK_SYNC); | |
569 | ||
4b1ac34b NB |
570 | sb->this_disk = sb->disks[dinfo->number]; |
571 | sb->sb_csum = calc_sb0_csum(sb); | |
96395475 | 572 | rv = store_super0(st, fd, sb); |
55935d51 | 573 | |
1bf4e2d9 NB |
574 | if (rv == 0 && (sb->state & (1<<MD_SB_BITMAP_PRESENT))) |
575 | rv = st->ss->write_bitmap(st, fd, sbv); | |
55935d51 | 576 | |
4b1ac34b NB |
577 | close(fd); |
578 | if (rv) | |
579 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
580 | return rv; | |
581 | } | |
582 | ||
f9ce90ba | 583 | static int compare_super0(void **firstp, void *secondv) |
4b1ac34b NB |
584 | { |
585 | /* | |
586 | * return: | |
587 | * 0 same, or first was empty, and second was copied | |
588 | * 1 second had wrong number | |
589 | * 2 wrong uuid | |
590 | * 3 wrong other info | |
591 | */ | |
592 | mdp_super_t *first = *firstp; | |
593 | mdp_super_t *second = secondv; | |
594 | ||
595 | int uuid1[4], uuid2[4]; | |
596 | if (second->md_magic != MD_SB_MAGIC) | |
597 | return 1; | |
598 | if (!first) { | |
599 | first = malloc(MD_SB_BYTES); | |
600 | memcpy(first, second, MD_SB_BYTES); | |
601 | *firstp = first; | |
602 | return 0; | |
603 | } | |
604 | ||
605 | uuid_from_super0(uuid1, first); | |
606 | uuid_from_super0(uuid2, second); | |
f277ce36 | 607 | if (!same_uuid(uuid1, uuid2, 0)) |
4b1ac34b NB |
608 | return 2; |
609 | if (first->major_version != second->major_version || | |
610 | first->minor_version != second->minor_version || | |
611 | first->patch_version != second->patch_version || | |
612 | first->gvalid_words != second->gvalid_words || | |
613 | first->ctime != second->ctime || | |
614 | first->level != second->level || | |
615 | first->size != second->size || | |
616 | first->raid_disks != second->raid_disks ) | |
617 | return 3; | |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
622 | ||
82d9eba6 | 623 | static int load_super0(struct supertype *st, int fd, void **sbp, char *devname) |
4b1ac34b NB |
624 | { |
625 | /* try to read in the superblock | |
626 | * Return: | |
627 | * 0 on success | |
628 | * 1 on cannot get superblock | |
629 | * 2 on superblock meaningless | |
630 | */ | |
631 | unsigned long size; | |
632 | unsigned long long dsize; | |
633 | unsigned long long offset; | |
634 | mdp_super_t *super; | |
635 | ||
636 | #ifdef BLKGETSIZE64 | |
637 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
638 | #endif | |
639 | { | |
640 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
641 | if (devname) | |
642 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
643 | devname, strerror(errno)); | |
644 | return 1; | |
645 | } else | |
646 | dsize = size << 9; | |
647 | } | |
648 | ||
649 | if (dsize < MD_RESERVED_SECTORS*2) { | |
650 | if (devname) | |
651 | fprintf(stderr, Name ": %s is too small for md: size is %ld sectors.\n", | |
652 | devname, size); | |
653 | return 1; | |
654 | } | |
353632d9 | 655 | |
4b1ac34b NB |
656 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
657 | ||
658 | offset *= 512; | |
659 | ||
660 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
661 | ||
662 | if (lseek64(fd, offset, 0)< 0LL) { | |
663 | if (devname) | |
664 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
665 | devname, strerror(errno)); | |
666 | return 1; | |
667 | } | |
668 | ||
8d75b7fc | 669 | super = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b NB |
670 | |
671 | if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) { | |
672 | if (devname) | |
673 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
674 | devname); | |
675 | free(super); | |
676 | return 1; | |
677 | } | |
678 | ||
586ed405 NB |
679 | if (st->ss && st->minor_version == 9) |
680 | super0_swap_endian(super); | |
681 | ||
4b1ac34b NB |
682 | if (super->md_magic != MD_SB_MAGIC) { |
683 | if (devname) | |
684 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
685 | devname, MD_SB_MAGIC, super->md_magic); | |
686 | free(super); | |
687 | return 2; | |
688 | } | |
689 | ||
690 | if (super->major_version != 0) { | |
691 | if (devname) | |
692 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
693 | devname, super->major_version); | |
694 | free(super); | |
695 | return 2; | |
696 | } | |
697 | *sbp = super; | |
82d9eba6 NB |
698 | if (st->ss == NULL) { |
699 | st->ss = &super0; | |
700 | st->minor_version = 90; | |
ea329559 | 701 | st->max_devs = MD_SB_DISKS; |
82d9eba6 NB |
702 | } |
703 | ||
4b1ac34b NB |
704 | return 0; |
705 | } | |
f9ce90ba | 706 | |
82d9eba6 | 707 | static struct supertype *match_metadata_desc0(char *arg) |
f9ce90ba | 708 | { |
82d9eba6 NB |
709 | struct supertype *st = malloc(sizeof(*st)); |
710 | if (!st) return st; | |
711 | ||
712 | st->ss = &super0; | |
713 | st->minor_version = 90; | |
ea329559 | 714 | st->max_devs = MD_SB_DISKS; |
f9ce90ba NB |
715 | if (strcmp(arg, "0") == 0 || |
716 | strcmp(arg, "0.90") == 0 || | |
717 | strcmp(arg, "default") == 0 | |
718 | ) | |
82d9eba6 NB |
719 | return st; |
720 | ||
586ed405 NB |
721 | st->minor_version = 9; /* flag for 'byte-swapped' */ |
722 | if (strcmp(arg, "0.swap")==0) | |
723 | return st; | |
724 | ||
82d9eba6 NB |
725 | free(st); |
726 | return NULL; | |
727 | } | |
728 | ||
1bf4e2d9 | 729 | static __u64 avail_size0(struct supertype *st, __u64 devsize) |
82d9eba6 NB |
730 | { |
731 | if (devsize < MD_RESERVED_SECTORS*2) | |
732 | return 0ULL; | |
733 | return MD_NEW_SIZE_SECTORS(devsize); | |
f9ce90ba NB |
734 | } |
735 | ||
f9c25f1d | 736 | 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 |
737 | { |
738 | /* | |
739 | * The bitmap comes immediately after the superblock and must be 60K in size | |
740 | * at most. The default size is between 30K and 60K | |
741 | * | |
8686f3ed | 742 | * size is in sectors, chunk is in bytes !!! |
55935d51 | 743 | */ |
1bf4e2d9 | 744 | unsigned long long bits; |
55935d51 NB |
745 | unsigned long long max_bits = 60*1024*8; |
746 | unsigned long long min_chunk; | |
747 | mdp_super_t *sb = sbv; | |
748 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES); | |
749 | ||
353632d9 | 750 | |
f277ce36 | 751 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ |
8686f3ed | 752 | bits = (size * 512) / min_chunk + 1; |
55935d51 NB |
753 | while (bits > max_bits) { |
754 | min_chunk *= 2; | |
755 | bits = (bits+1)/2; | |
756 | } | |
757 | if (chunk == UnSet) | |
758 | chunk = min_chunk; | |
759 | else if (chunk < min_chunk) | |
760 | return 0; /* chunk size too small */ | |
761 | ||
762 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); | |
763 | ||
29e766a5 | 764 | memset(bms, 0, sizeof(*bms)); |
dfd4d8ee | 765 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
dcec9ee5 | 766 | bms->version = __cpu_to_le32(major); |
55935d51 | 767 | uuid_from_super0((int*)bms->uuid, sb); |
dfd4d8ee NB |
768 | bms->chunksize = __cpu_to_le32(chunk); |
769 | bms->daemon_sleep = __cpu_to_le32(delay); | |
f9c25f1d | 770 | bms->sync_size = __cpu_to_le64(size); |
dfd4d8ee | 771 | bms->write_behind = __cpu_to_le32(write_behind); |
55935d51 | 772 | |
55935d51 NB |
773 | return 1; |
774 | } | |
353632d9 | 775 | |
55935d51 | 776 | |
f6d75de8 | 777 | void locate_bitmap0(struct supertype *st, int fd, void *sbv) |
55935d51 NB |
778 | { |
779 | unsigned long long dsize; | |
780 | unsigned long size; | |
781 | unsigned long long offset; | |
782 | #ifdef BLKGETSIZE64 | |
783 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
784 | #endif | |
785 | { | |
786 | if (ioctl(fd, BLKGETSIZE, &size)) | |
787 | return; | |
788 | else | |
789 | dsize = ((unsigned long long)size)<<9; | |
790 | } | |
791 | ||
792 | if (dsize < MD_RESERVED_SECTORS*2) | |
793 | return; | |
353632d9 | 794 | |
55935d51 NB |
795 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
796 | ||
797 | offset *= 512; | |
798 | ||
799 | offset += MD_SB_BYTES; | |
800 | ||
801 | lseek64(fd, offset, 0); | |
802 | } | |
803 | ||
8d75b7fc NB |
804 | int write_bitmap0(struct supertype *st, int fd, void *sbv) |
805 | { | |
806 | unsigned long size; | |
807 | unsigned long long dsize; | |
808 | unsigned long long offset; | |
809 | mdp_super_t *sb = sbv; | |
810 | ||
811 | int rv = 0; | |
812 | ||
813 | int towrite, n; | |
814 | char buf[4096]; | |
815 | ||
816 | #ifdef BLKGETSIZE64 | |
817 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
818 | #endif | |
819 | { | |
820 | if (ioctl(fd, BLKGETSIZE, &size)) | |
821 | return 1; | |
822 | else | |
823 | dsize = ((unsigned long long)size)<<9; | |
824 | } | |
825 | ||
826 | if (dsize < MD_RESERVED_SECTORS*2) | |
353632d9 NB |
827 | return -1; |
828 | ||
8d75b7fc NB |
829 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
830 | ||
831 | offset *= 512; | |
832 | ||
833 | if (lseek64(fd, offset + 4096, 0)< 0LL) | |
834 | return 3; | |
835 | ||
836 | ||
1e0d770c NB |
837 | if (write(fd, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t)) != |
838 | sizeof(bitmap_super_t)) | |
839 | return -2; | |
8d75b7fc NB |
840 | towrite = 64*1024 - MD_SB_BYTES - sizeof(bitmap_super_t); |
841 | memset(buf, 0xff, sizeof(buf)); | |
842 | while (towrite > 0) { | |
843 | n = towrite; | |
844 | if (n > sizeof(buf)) | |
845 | n = sizeof(buf); | |
846 | n = write(fd, buf, n); | |
847 | if (n > 0) | |
848 | towrite -= n; | |
849 | else | |
850 | break; | |
851 | } | |
dfd4d8ee | 852 | fsync(fd); |
8d75b7fc NB |
853 | if (towrite) |
854 | rv = -2; | |
855 | ||
856 | return rv; | |
857 | } | |
55935d51 | 858 | |
f9ce90ba | 859 | struct superswitch super0 = { |
c7654afc | 860 | #ifndef MDASSEMBLE |
f9ce90ba NB |
861 | .examine_super = examine_super0, |
862 | .brief_examine_super = brief_examine_super0, | |
863 | .detail_super = detail_super0, | |
864 | .brief_detail_super = brief_detail_super0, | |
c7654afc | 865 | #endif |
f9ce90ba NB |
866 | .uuid_from_super = uuid_from_super0, |
867 | .getinfo_super = getinfo_super0, | |
868 | .update_super = update_super0, | |
869 | .event_super = event_super0, | |
870 | .init_super = init_super0, | |
871 | .add_to_super = add_to_super0, | |
872 | .store_super = store_super0, | |
873 | .write_init_super = write_init_super0, | |
874 | .compare_super = compare_super0, | |
875 | .load_super = load_super0, | |
876 | .match_metadata_desc = match_metadata_desc0, | |
82d9eba6 | 877 | .avail_size = avail_size0, |
55935d51 NB |
878 | .add_internal_bitmap = add_internal_bitmap0, |
879 | .locate_bitmap = locate_bitmap0, | |
8d75b7fc | 880 | .write_bitmap = write_bitmap0, |
82d9eba6 | 881 | .major = 0, |
f277ce36 | 882 | .swapuuid = 0, |
f9ce90ba | 883 | }; |