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Commit | Line | Data |
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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 | ||
8268ed74 | 30 | #define HAVE_STDINT_H 1 |
4b1ac34b | 31 | #include "mdadm.h" |
8268ed74 | 32 | #include "sha1.h" |
4b1ac34b NB |
33 | /* |
34 | * All handling for the 0.90.0 version superblock is in | |
35 | * this file. | |
36 | * This includes: | |
37 | * - finding, loading, and writing the superblock. | |
38 | * - initialising a new superblock | |
39 | * - printing the superblock for --examine | |
40 | * - printing part of the superblock for --detail | |
41 | * .. other stuff | |
42 | */ | |
43 | ||
44 | ||
45 | static unsigned long calc_sb0_csum(mdp_super_t *super) | |
46 | { | |
47 | unsigned long csum = super->sb_csum; | |
48 | unsigned long newcsum; | |
49 | super->sb_csum= 0 ; | |
50 | newcsum = calc_csum(super, MD_SB_BYTES); | |
51 | super->sb_csum = csum; | |
52 | return newcsum; | |
53 | } | |
54 | ||
586ed405 NB |
55 | |
56 | void super0_swap_endian(struct mdp_superblock_s *sb) | |
57 | { | |
58 | /* as super0 superblocks are host-endian, it is sometimes | |
59 | * useful to be able to swap the endianness | |
60 | * as (almost) everything is u32's we byte-swap every 4byte | |
61 | * number. | |
62 | * We then also have to swap the events_hi and events_lo | |
63 | */ | |
64 | char *sbc = (char *)sb; | |
65 | __u32 t32; | |
66 | int i; | |
67 | ||
68 | for (i=0; i < MD_SB_BYTES ; i+=4) { | |
69 | char t = sbc[i]; | |
70 | sbc[i] = sbc[i+3]; | |
71 | sbc[i+3] = t; | |
72 | t=sbc[i+1]; | |
73 | sbc[i+1]=sbc[i+2]; | |
74 | sbc[i+2]=t; | |
75 | } | |
76 | t32 = sb->events_hi; | |
77 | sb->events_hi = sb->events_lo; | |
78 | sb->events_lo = t32; | |
79 | ||
80 | t32 = sb->cp_events_hi; | |
81 | sb->cp_events_hi = sb->cp_events_lo; | |
82 | sb->cp_events_lo = t32; | |
83 | ||
353632d9 | 84 | } |
586ed405 | 85 | |
c7654afc | 86 | #ifndef MDASSEMBLE |
586ed405 | 87 | |
a1cbd7d0 | 88 | static void examine_super0(void *sbv, char *homehost) |
4b1ac34b NB |
89 | { |
90 | mdp_super_t *sb = sbv; | |
91 | time_t atime; | |
92 | int d; | |
93 | char *c; | |
94 | ||
95 | printf(" Magic : %08x\n", sb->md_magic); | |
96 | printf(" Version : %02d.%02d.%02d\n", sb->major_version, sb->minor_version, | |
97 | sb->patch_version); | |
a1cbd7d0 NB |
98 | if (sb->minor_version >= 90) { |
99 | printf(" UUID : %08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
4b1ac34b | 100 | sb->set_uuid2, sb->set_uuid3); |
a1cbd7d0 | 101 | if (homehost) { |
8268ed74 NB |
102 | char buf[20]; |
103 | void *hash = sha1_buffer(homehost, | |
104 | strlen(homehost), | |
105 | buf); | |
a1cbd7d0 NB |
106 | if (memcmp(&sb->set_uuid2, hash, 8)==0) |
107 | printf(" (local to host %s)", homehost); | |
108 | } | |
109 | printf("\n"); | |
110 | } else | |
4b1ac34b NB |
111 | printf(" UUID : %08x\n", sb->set_uuid0); |
112 | ||
113 | atime = sb->ctime; | |
114 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
115 | c=map_num(pers, sb->level); | |
116 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
b674b5b8 NB |
117 | if ((int)sb->level >= 0) { |
118 | int ddsks=0; | |
4b1ac34b | 119 | printf(" Device Size : %d%s\n", sb->size, human_size((long long)sb->size<<10)); |
b674b5b8 NB |
120 | switch(sb->level) { |
121 | case 1: ddsks=1;break; | |
122 | case 4: | |
123 | case 5: ddsks = sb->raid_disks-1; break; | |
124 | case 6: ddsks = sb->raid_disks-2; break; | |
125 | case 10: ddsks = sb->raid_disks / (sb->layout&255) / ((sb->layout>>8)&255); | |
126 | } | |
127 | if (ddsks) | |
128 | printf(" Array Size : %llu%s\n", (unsigned long long)ddsks * sb->size, | |
129 | human_size(ddsks*(long long)sb->size<<10)); | |
130 | } | |
4b1ac34b NB |
131 | printf(" Raid Devices : %d\n", sb->raid_disks); |
132 | printf(" Total Devices : %d\n", sb->nr_disks); | |
133 | printf("Preferred Minor : %d\n", sb->md_minor); | |
134 | printf("\n"); | |
b674b5b8 | 135 | if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) { |
1e0d770c | 136 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)sb->reshape_position/2, human_size((long long)sb->reshape_position<<9)); |
b674b5b8 NB |
137 | if (sb->delta_disks) { |
138 | printf(" Delta Devices : %d", sb->delta_disks); | |
139 | if (sb->delta_disks) | |
140 | printf(" (%d->%d)\n", sb->raid_disks-sb->delta_disks, sb->raid_disks); | |
141 | else | |
142 | printf(" (%d->%d)\n", sb->raid_disks, sb->raid_disks+sb->delta_disks); | |
143 | } | |
144 | if (sb->new_level != sb->level) { | |
145 | c = map_num(pers, sb->new_level); | |
146 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
147 | } | |
148 | if (sb->new_layout != sb->layout) { | |
149 | if (sb->level == 5) { | |
150 | c = map_num(r5layout, sb->new_layout); | |
151 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
152 | } | |
153 | if (sb->level == 10) { | |
b578481c NB |
154 | printf(" New Layout : near=%d, %s=%d\n", |
155 | sb->new_layout&255, | |
156 | (sb->new_layout&0x10000)?"offset":"far", | |
157 | (sb->new_layout>>8)&255); | |
b674b5b8 NB |
158 | } |
159 | } | |
160 | if (sb->new_chunk != sb->chunk_size) | |
161 | printf(" New Chunksize : %d\n", sb->new_chunk); | |
162 | printf("\n"); | |
163 | } | |
4b1ac34b NB |
164 | atime = sb->utime; |
165 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
166 | printf(" State : %s\n", | |
167 | (sb->state&(1<<MD_SB_CLEAN))?"clean":"active"); | |
55935d51 NB |
168 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) |
169 | printf("Internal Bitmap : present\n"); | |
4b1ac34b NB |
170 | printf(" Active Devices : %d\n", sb->active_disks); |
171 | printf("Working Devices : %d\n", sb->working_disks); | |
172 | printf(" Failed Devices : %d\n", sb->failed_disks); | |
173 | printf(" Spare Devices : %d\n", sb->spare_disks); | |
174 | if (calc_sb0_csum(sb) == sb->sb_csum) | |
175 | printf(" Checksum : %x - correct\n", sb->sb_csum); | |
176 | else | |
177 | printf(" Checksum : %x - expected %lx\n", sb->sb_csum, calc_sb0_csum(sb)); | |
178 | printf(" Events : %d.%d\n", sb->events_hi, sb->events_lo); | |
179 | printf("\n"); | |
180 | if (sb->level == 5) { | |
181 | c = map_num(r5layout, sb->layout); | |
182 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
183 | } | |
265e0f17 | 184 | if (sb->level == 10) { |
b578481c NB |
185 | printf(" Layout : near=%d, %s=%d\n", |
186 | sb->layout&255, | |
187 | (sb->layout&0x10000)?"offset":"far", | |
188 | (sb->layout>>8)&255); | |
265e0f17 | 189 | } |
4b1ac34b NB |
190 | switch(sb->level) { |
191 | case 0: | |
192 | case 4: | |
193 | case 5: | |
194 | printf(" Chunk Size : %dK\n", sb->chunk_size/1024); | |
195 | break; | |
196 | case -1: | |
197 | printf(" Rounding : %dK\n", sb->chunk_size/1024); | |
198 | break; | |
353632d9 | 199 | default: break; |
4b1ac34b NB |
200 | } |
201 | printf("\n"); | |
202 | printf(" Number Major Minor RaidDevice State\n"); | |
203 | for (d= -1; d<(signed int)(sb->raid_disks+sb->spare_disks); d++) { | |
204 | mdp_disk_t *dp; | |
205 | char *dv; | |
206 | char nb[5]; | |
dfd4d8ee | 207 | int wonly; |
4b1ac34b NB |
208 | if (d>=0) dp = &sb->disks[d]; |
209 | else dp = &sb->this_disk; | |
8f23b0b3 | 210 | snprintf(nb, sizeof(nb), "%4d", d); |
4b1ac34b NB |
211 | printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb, |
212 | dp->number, dp->major, dp->minor, dp->raid_disk); | |
dfd4d8ee NB |
213 | wonly = dp->state & (1<<MD_DISK_WRITEMOSTLY); |
214 | dp->state &= ~(1<<MD_DISK_WRITEMOSTLY); | |
4b1ac34b NB |
215 | if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty"); |
216 | if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active"); | |
217 | if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync"); | |
218 | if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed"); | |
dfd4d8ee | 219 | if (wonly) printf(" write-mostly"); |
4b1ac34b | 220 | if (dp->state == 0) printf(" spare"); |
16c6fa80 | 221 | if ((dv=map_dev(dp->major, dp->minor, 0))) |
4b1ac34b NB |
222 | printf(" %s", dv); |
223 | printf("\n"); | |
224 | if (d == -1) printf("\n"); | |
225 | } | |
226 | } | |
227 | ||
f9ce90ba | 228 | static void brief_examine_super0(void *sbv) |
4b1ac34b NB |
229 | { |
230 | mdp_super_t *sb = sbv; | |
231 | char *c=map_num(pers, sb->level); | |
2998bc01 | 232 | char devname[20]; |
2998bc01 NB |
233 | |
234 | sprintf(devname, "/dev/md%d", sb->md_minor); | |
4b1ac34b NB |
235 | |
236 | printf("ARRAY %s level=%s num-devices=%d UUID=", | |
2998bc01 | 237 | devname, |
4b1ac34b NB |
238 | c?c:"-unknown-", sb->raid_disks); |
239 | if (sb->minor_version >= 90) | |
240 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
241 | sb->set_uuid2, sb->set_uuid3); | |
242 | else | |
243 | printf("%08x", sb->set_uuid0); | |
244 | printf("\n"); | |
245 | } | |
246 | ||
b6750aa8 | 247 | static void detail_super0(void *sbv, char *homehost) |
4b1ac34b NB |
248 | { |
249 | mdp_super_t *sb = sbv; | |
250 | printf(" UUID : "); | |
251 | if (sb->minor_version >= 90) | |
252 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
253 | sb->set_uuid2, sb->set_uuid3); | |
254 | else | |
255 | printf("%08x", sb->set_uuid0); | |
b6750aa8 | 256 | if (homehost) { |
8268ed74 NB |
257 | char buf[20]; |
258 | void *hash = sha1_buffer(homehost, | |
259 | strlen(homehost), | |
260 | buf); | |
b6750aa8 NB |
261 | if (memcmp(&sb->set_uuid2, hash, 8)==0) |
262 | printf(" (local to host %s)", homehost); | |
263 | } | |
4b1ac34b NB |
264 | printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo); |
265 | } | |
266 | ||
f9ce90ba | 267 | static void brief_detail_super0(void *sbv) |
4b1ac34b NB |
268 | { |
269 | mdp_super_t *sb = sbv; | |
270 | printf(" UUID="); | |
271 | if (sb->minor_version >= 90) | |
272 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
273 | sb->set_uuid2, sb->set_uuid3); | |
274 | else | |
275 | printf("%08x", sb->set_uuid0); | |
276 | } | |
c7654afc | 277 | #endif |
83b6208e NB |
278 | |
279 | static int match_home0(void *sbv, char *homehost) | |
280 | { | |
281 | mdp_super_t *sb = sbv; | |
8268ed74 NB |
282 | char buf[20]; |
283 | char *hash = sha1_buffer(homehost, | |
284 | strlen(homehost), | |
285 | buf); | |
83b6208e NB |
286 | |
287 | return (memcmp(&sb->set_uuid2, hash, 8)==0); | |
288 | } | |
289 | ||
f9ce90ba | 290 | static void uuid_from_super0(int uuid[4], void * sbv) |
4b1ac34b NB |
291 | { |
292 | mdp_super_t *super = sbv; | |
293 | uuid[0] = super->set_uuid0; | |
294 | if (super->minor_version >= 90) { | |
295 | uuid[1] = super->set_uuid1; | |
296 | uuid[2] = super->set_uuid2; | |
297 | uuid[3] = super->set_uuid3; | |
298 | } else { | |
299 | uuid[1] = 0; | |
300 | uuid[2] = 0; | |
301 | uuid[3] = 0; | |
302 | } | |
303 | } | |
304 | ||
31317663 | 305 | static void getinfo_super0(struct mdinfo *info, void *sbv) |
4b1ac34b NB |
306 | { |
307 | mdp_super_t *sb = sbv; | |
308 | int working = 0; | |
309 | int i; | |
310 | ||
311 | info->array.major_version = sb->major_version; | |
312 | info->array.minor_version = sb->minor_version; | |
313 | info->array.patch_version = sb->patch_version; | |
314 | info->array.raid_disks = sb->raid_disks; | |
315 | info->array.level = sb->level; | |
265e0f17 | 316 | info->array.layout = sb->layout; |
4b1ac34b NB |
317 | info->array.md_minor = sb->md_minor; |
318 | info->array.ctime = sb->ctime; | |
353632d9 NB |
319 | info->array.utime = sb->utime; |
320 | info->array.chunk_size = sb->chunk_size; | |
321 | info->component_size = sb->size*2; | |
4b1ac34b NB |
322 | |
323 | info->disk.state = sb->this_disk.state; | |
324 | info->disk.major = sb->this_disk.major; | |
325 | info->disk.minor = sb->this_disk.minor; | |
326 | info->disk.raid_disk = sb->this_disk.raid_disk; | |
fbf8a0b7 | 327 | info->disk.number = sb->this_disk.number; |
4b1ac34b NB |
328 | |
329 | info->events = md_event(sb); | |
353632d9 | 330 | info->data_offset = 0; |
4b1ac34b NB |
331 | |
332 | uuid_from_super0(info->uuid, sbv); | |
947fd4dd | 333 | |
353632d9 NB |
334 | if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) { |
335 | info->reshape_active = 1; | |
336 | info->reshape_progress = sb->reshape_position; | |
337 | info->new_level = sb->new_level; | |
338 | info->delta_disks = sb->delta_disks; | |
339 | info->new_layout = sb->new_layout; | |
340 | info->new_chunk = sb->new_chunk; | |
341 | } else | |
342 | info->reshape_active = 0; | |
343 | ||
8a46fe84 | 344 | sprintf(info->name, "%d", sb->md_minor); |
4b1ac34b NB |
345 | /* work_disks is calculated rather than read directly */ |
346 | for (i=0; i < MD_SB_DISKS; i++) | |
347 | if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) && | |
08110d41 | 348 | (sb->disks[i].raid_disk < info->array.raid_disks) && |
4b1ac34b NB |
349 | (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) && |
350 | !(sb->disks[i].state & (1<<MD_DISK_FAULTY))) | |
351 | working ++; | |
352 | info->array.working_disks = working; | |
353 | } | |
354 | ||
355 | ||
e5eac01f NB |
356 | static int update_super0(struct mdinfo *info, void *sbv, char *update, |
357 | char *devname, int verbose, | |
358 | int uuid_set, char *homehost) | |
4b1ac34b | 359 | { |
c4d831e1 NB |
360 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. |
361 | * For others, the return value is ignored. | |
362 | */ | |
4b1ac34b NB |
363 | int rv = 0; |
364 | mdp_super_t *sb = sbv; | |
365 | if (strcmp(update, "sparc2.2")==0 ) { | |
366 | /* 2.2 sparc put the events in the wrong place | |
367 | * So we copy the tail of the superblock | |
368 | * up 4 bytes before continuing | |
369 | */ | |
370 | __u32 *sb32 = (__u32*)sb; | |
371 | memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, | |
372 | sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1, | |
373 | (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4); | |
dab6685f NB |
374 | if (verbose >= 0) |
375 | fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n", | |
376 | devname); | |
4b1ac34b NB |
377 | } |
378 | if (strcmp(update, "super-minor") ==0) { | |
379 | sb->md_minor = info->array.md_minor; | |
dab6685f | 380 | if (verbose > 0) |
4b1ac34b NB |
381 | fprintf(stderr, Name ": updating superblock of %s with minor number %d\n", |
382 | devname, info->array.md_minor); | |
383 | } | |
384 | if (strcmp(update, "summaries") == 0) { | |
385 | int i; | |
386 | /* set nr_disks, active_disks, working_disks, | |
387 | * failed_disks, spare_disks based on disks[] | |
388 | * array in superblock. | |
389 | * Also make sure extra slots aren't 'failed' | |
390 | */ | |
391 | sb->nr_disks = sb->active_disks = | |
392 | sb->working_disks = sb->failed_disks = | |
393 | sb->spare_disks = 0; | |
394 | for (i=0; i < MD_SB_DISKS ; i++) | |
395 | if (sb->disks[i].major || | |
396 | sb->disks[i].minor) { | |
397 | int state = sb->disks[i].state; | |
398 | if (state & (1<<MD_DISK_REMOVED)) | |
399 | continue; | |
400 | sb->nr_disks++; | |
401 | if (state & (1<<MD_DISK_ACTIVE)) | |
402 | sb->active_disks++; | |
403 | if (state & (1<<MD_DISK_FAULTY)) | |
404 | sb->failed_disks++; | |
405 | else | |
406 | sb->working_disks++; | |
407 | if (state == 0) | |
408 | sb->spare_disks++; | |
409 | } else if (i >= sb->raid_disks && sb->disks[i].number == 0) | |
410 | sb->disks[i].state = 0; | |
411 | } | |
412 | if (strcmp(update, "force")==0) { | |
c4d831e1 | 413 | __u32 ehi = sb->events_hi, elo = sb->events_lo; |
4b1ac34b NB |
414 | sb->events_hi = (info->events>>32) & 0xFFFFFFFF; |
415 | sb->events_lo = (info->events) & 0xFFFFFFFF; | |
c4d831e1 NB |
416 | if (sb->events_hi != ehi || |
417 | sb->events_lo != elo) | |
418 | rv = 1; | |
419 | if ((sb->level == 5 || sb->level == 4 || sb->level == 6) && | |
420 | (sb->state & (1 << MD_SB_CLEAN)) == 0) { | |
4b1ac34b NB |
421 | /* need to force clean */ |
422 | sb->state |= (1 << MD_SB_CLEAN); | |
c4d831e1 NB |
423 | rv = 1; |
424 | } | |
4b1ac34b NB |
425 | } |
426 | if (strcmp(update, "assemble")==0) { | |
427 | int d = info->disk.number; | |
dfd4d8ee | 428 | int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY); |
c4d831e1 NB |
429 | if ((sb->disks[d].state & ~(1<<MD_DISK_WRITEMOSTLY)) |
430 | != info->disk.state) { | |
431 | sb->disks[d].state = info->disk.state | wonly; | |
4b1ac34b NB |
432 | rv = 1; |
433 | } | |
434 | } | |
435 | if (strcmp(update, "newdev") == 0) { | |
436 | int d = info->disk.number; | |
437 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
438 | sb->disks[d].number = d; | |
439 | sb->disks[d].major = info->disk.major; | |
440 | sb->disks[d].minor = info->disk.minor; | |
441 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
442 | sb->disks[d].state = info->disk.state; | |
443 | sb->this_disk = sb->disks[d]; | |
444 | } | |
445 | if (strcmp(update, "grow") == 0) { | |
446 | sb->raid_disks = info->array.raid_disks; | |
447 | sb->nr_disks = info->array.nr_disks; | |
448 | sb->active_disks = info->array.active_disks; | |
449 | sb->working_disks = info->array.working_disks; | |
450 | memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0])); | |
451 | sb->disks[info->disk.number].number = info->disk.number; | |
452 | sb->disks[info->disk.number].major = info->disk.major; | |
453 | sb->disks[info->disk.number].minor = info->disk.minor; | |
454 | sb->disks[info->disk.number].raid_disk = info->disk.raid_disk; | |
455 | sb->disks[info->disk.number].state = info->disk.state; | |
456 | if (sb->this_disk.number == info->disk.number) | |
457 | sb->this_disk = sb->disks[info->disk.number]; | |
458 | } | |
459 | if (strcmp(update, "resync") == 0) { | |
460 | /* make sure resync happens */ | |
461 | sb->state &= ~(1<<MD_SB_CLEAN); | |
462 | sb->recovery_cp = 0; | |
463 | } | |
0237e0ca NB |
464 | if (strcmp(update, "homehost") == 0 && |
465 | homehost) { | |
466 | uuid_set = 0; | |
467 | update = "uuid"; | |
468 | info->uuid[0] = sb->set_uuid0; | |
469 | info->uuid[1] = sb->set_uuid1; | |
470 | } | |
7d99579f | 471 | if (strcmp(update, "uuid") == 0) { |
e5eac01f | 472 | if (!uuid_set && homehost) { |
8268ed74 NB |
473 | char buf[20]; |
474 | char *hash = sha1_buffer(homehost, | |
475 | strlen(homehost), | |
476 | buf); | |
e5eac01f NB |
477 | memcpy(info->uuid+2, hash, 8); |
478 | } | |
7d99579f NB |
479 | sb->set_uuid0 = info->uuid[0]; |
480 | sb->set_uuid1 = info->uuid[1]; | |
481 | sb->set_uuid2 = info->uuid[2]; | |
482 | sb->set_uuid3 = info->uuid[3]; | |
14263cf1 NB |
483 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) { |
484 | struct bitmap_super_s *bm; | |
485 | bm = (struct bitmap_super_s*)(sb+1); | |
486 | uuid_from_super0((int*)bm->uuid, sbv); | |
487 | } | |
7d99579f | 488 | } |
353632d9 NB |
489 | if (strcmp(update, "_reshape_progress")==0) |
490 | sb->reshape_position = info->reshape_progress; | |
4b1ac34b NB |
491 | |
492 | sb->sb_csum = calc_sb0_csum(sb); | |
493 | return rv; | |
494 | } | |
495 | ||
f9ce90ba | 496 | static __u64 event_super0(void *sbv) |
4b1ac34b NB |
497 | { |
498 | mdp_super_t *sb = sbv; | |
499 | return md_event(sb); | |
500 | } | |
501 | ||
05697ec1 NB |
502 | /* |
503 | * For verion-0 superblock, the homehost is 'stored' in the | |
504 | * uuid. 8 bytes for a hash of the host leaving 8 bytes | |
505 | * of random material. | |
506 | * We use the first 8 bytes (64bits) of the sha1 of the | |
507 | * host name | |
508 | */ | |
4b1ac34b NB |
509 | |
510 | ||
05697ec1 NB |
511 | static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, |
512 | unsigned long long size, char *ignored_name, char *homehost) | |
4b1ac34b | 513 | { |
55935d51 | 514 | mdp_super_t *sb = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
82d9eba6 | 515 | int spares; |
dfe47e00 | 516 | int rfd; |
55935d51 | 517 | memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b | 518 | |
f9ce90ba NB |
519 | if (info->major_version == -1) { |
520 | /* zeroing the superblock */ | |
05697ec1 | 521 | *sbp = sb; |
82d9eba6 NB |
522 | return 0; |
523 | } | |
524 | ||
525 | spares = info->working_disks - info->active_disks; | |
526 | if (info->raid_disks + spares > MD_SB_DISKS) { | |
527 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
528 | info->raid_disks , spares, MD_SB_DISKS); | |
529 | return 0; | |
f9ce90ba NB |
530 | } |
531 | ||
dfe47e00 | 532 | rfd = open("/dev/urandom", O_RDONLY); |
4b1ac34b NB |
533 | sb->md_magic = MD_SB_MAGIC; |
534 | sb->major_version = 0; | |
535 | sb->minor_version = 90; | |
536 | sb->patch_version = 0; | |
537 | sb->gvalid_words = 0; /* ignored */ | |
dfe47e00 NB |
538 | if (rfd < 0 || read(rfd, &sb->set_uuid0, 4) != 4) |
539 | sb->set_uuid0 = random(); | |
4b1ac34b NB |
540 | sb->ctime = time(0); |
541 | sb->level = info->level; | |
5dd497ee NB |
542 | if (size != info->size) |
543 | return 0; | |
4b1ac34b NB |
544 | sb->size = info->size; |
545 | sb->nr_disks = info->nr_disks; | |
546 | sb->raid_disks = info->raid_disks; | |
547 | sb->md_minor = info->md_minor; | |
548 | sb->not_persistent = 0; | |
dfe47e00 NB |
549 | if (rfd < 0 || read(rfd, &sb->set_uuid1, 12) != 12) { |
550 | sb->set_uuid1 = random(); | |
551 | sb->set_uuid2 = random(); | |
552 | sb->set_uuid3 = random(); | |
553 | } | |
554 | if (rfd >= 0) | |
555 | close(rfd); | |
05697ec1 | 556 | if (homehost) { |
8268ed74 NB |
557 | char buf[20]; |
558 | char *hash = sha1_buffer(homehost, | |
559 | strlen(homehost), | |
560 | buf); | |
05697ec1 NB |
561 | memcpy(&sb->set_uuid2, hash, 8); |
562 | } | |
4b1ac34b NB |
563 | |
564 | sb->utime = sb->ctime; | |
565 | sb->state = info->state; | |
566 | sb->active_disks = info->active_disks; | |
567 | sb->working_disks = info->working_disks; | |
568 | sb->failed_disks = info->failed_disks; | |
234a131a | 569 | sb->spare_disks = info->spare_disks; |
4b1ac34b NB |
570 | sb->events_hi = 0; |
571 | sb->events_lo = 1; | |
572 | ||
573 | sb->layout = info->layout; | |
574 | sb->chunk_size = info->chunk_size; | |
575 | ||
576 | *sbp = sb; | |
82d9eba6 | 577 | return 1; |
4b1ac34b NB |
578 | } |
579 | ||
580 | /* Add a device to the superblock being created */ | |
f9ce90ba | 581 | static void add_to_super0(void *sbv, mdu_disk_info_t *dinfo) |
4b1ac34b NB |
582 | { |
583 | mdp_super_t *sb = sbv; | |
584 | mdp_disk_t *dk = &sb->disks[dinfo->number]; | |
353632d9 | 585 | |
4b1ac34b NB |
586 | dk->number = dinfo->number; |
587 | dk->major = dinfo->major; | |
588 | dk->minor = dinfo->minor; | |
589 | dk->raid_disk = dinfo->raid_disk; | |
590 | dk->state = dinfo->state; | |
591 | } | |
592 | ||
96395475 | 593 | static int store_super0(struct supertype *st, int fd, void *sbv) |
4b1ac34b NB |
594 | { |
595 | unsigned long size; | |
596 | unsigned long long dsize; | |
597 | unsigned long long offset; | |
f9ce90ba | 598 | mdp_super_t *super = sbv; |
4b1ac34b NB |
599 | |
600 | #ifdef BLKGETSIZE64 | |
601 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
602 | #endif | |
603 | { | |
604 | if (ioctl(fd, BLKGETSIZE, &size)) | |
605 | return 1; | |
606 | else | |
607 | dsize = ((unsigned long long)size)<<9; | |
608 | } | |
609 | ||
5dd497ee | 610 | if (dsize < MD_RESERVED_SECTORS*2*512) |
4b1ac34b | 611 | return 2; |
353632d9 | 612 | |
4b1ac34b NB |
613 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
614 | ||
615 | offset *= 512; | |
616 | ||
617 | if (lseek64(fd, offset, 0)< 0LL) | |
618 | return 3; | |
619 | ||
620 | if (write(fd, super, sizeof(*super)) != sizeof(*super)) | |
621 | return 4; | |
622 | ||
14263cf1 NB |
623 | if (super->state & (1<<MD_SB_BITMAP_PRESENT)) { |
624 | struct bitmap_super_s * bm = (struct bitmap_super_s*)(super+1); | |
625 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) | |
9fca7d62 NB |
626 | if (write(fd, bm, sizeof(*bm)) != sizeof(*bm)) |
627 | return 5; | |
14263cf1 NB |
628 | } |
629 | ||
570c0542 | 630 | fsync(fd); |
4b1ac34b NB |
631 | return 0; |
632 | } | |
633 | ||
1bf4e2d9 | 634 | static int write_init_super0(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname) |
4b1ac34b NB |
635 | { |
636 | mdp_super_t *sb = sbv; | |
dfd4d8ee | 637 | int fd = open(devname, O_RDWR|O_EXCL); |
4b1ac34b NB |
638 | int rv; |
639 | ||
640 | if (fd < 0) { | |
641 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", devname); | |
642 | return -1; | |
643 | } | |
644 | ||
8d75b7fc | 645 | sb->disks[dinfo->number].state &= ~(1<<MD_DISK_FAULTY); |
8d75b7fc | 646 | |
4b1ac34b NB |
647 | sb->this_disk = sb->disks[dinfo->number]; |
648 | sb->sb_csum = calc_sb0_csum(sb); | |
96395475 | 649 | rv = store_super0(st, fd, sb); |
55935d51 | 650 | |
1bf4e2d9 NB |
651 | if (rv == 0 && (sb->state & (1<<MD_SB_BITMAP_PRESENT))) |
652 | rv = st->ss->write_bitmap(st, fd, sbv); | |
55935d51 | 653 | |
4b1ac34b NB |
654 | close(fd); |
655 | if (rv) | |
656 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
657 | return rv; | |
658 | } | |
659 | ||
f9ce90ba | 660 | static int compare_super0(void **firstp, void *secondv) |
4b1ac34b NB |
661 | { |
662 | /* | |
663 | * return: | |
664 | * 0 same, or first was empty, and second was copied | |
665 | * 1 second had wrong number | |
666 | * 2 wrong uuid | |
667 | * 3 wrong other info | |
668 | */ | |
669 | mdp_super_t *first = *firstp; | |
670 | mdp_super_t *second = secondv; | |
671 | ||
672 | int uuid1[4], uuid2[4]; | |
673 | if (second->md_magic != MD_SB_MAGIC) | |
674 | return 1; | |
675 | if (!first) { | |
14263cf1 NB |
676 | first = malloc(MD_SB_BYTES + sizeof(struct bitmap_super_s)); |
677 | memcpy(first, second, MD_SB_BYTES + sizeof(struct bitmap_super_s)); | |
4b1ac34b NB |
678 | *firstp = first; |
679 | return 0; | |
680 | } | |
681 | ||
682 | uuid_from_super0(uuid1, first); | |
683 | uuid_from_super0(uuid2, second); | |
f277ce36 | 684 | if (!same_uuid(uuid1, uuid2, 0)) |
4b1ac34b NB |
685 | return 2; |
686 | if (first->major_version != second->major_version || | |
687 | first->minor_version != second->minor_version || | |
688 | first->patch_version != second->patch_version || | |
689 | first->gvalid_words != second->gvalid_words || | |
690 | first->ctime != second->ctime || | |
691 | first->level != second->level || | |
692 | first->size != second->size || | |
693 | first->raid_disks != second->raid_disks ) | |
694 | return 3; | |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
699 | ||
82d9eba6 | 700 | static int load_super0(struct supertype *st, int fd, void **sbp, char *devname) |
4b1ac34b NB |
701 | { |
702 | /* try to read in the superblock | |
703 | * Return: | |
704 | * 0 on success | |
705 | * 1 on cannot get superblock | |
706 | * 2 on superblock meaningless | |
707 | */ | |
708 | unsigned long size; | |
709 | unsigned long long dsize; | |
710 | unsigned long long offset; | |
711 | mdp_super_t *super; | |
14263cf1 NB |
712 | int uuid[4]; |
713 | struct bitmap_super_s *bsb; | |
4b1ac34b NB |
714 | |
715 | #ifdef BLKGETSIZE64 | |
716 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
717 | #endif | |
718 | { | |
719 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
720 | if (devname) | |
721 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
722 | devname, strerror(errno)); | |
723 | return 1; | |
724 | } else | |
725 | dsize = size << 9; | |
726 | } | |
727 | ||
728 | if (dsize < MD_RESERVED_SECTORS*2) { | |
729 | if (devname) | |
730 | fprintf(stderr, Name ": %s is too small for md: size is %ld sectors.\n", | |
731 | devname, size); | |
732 | return 1; | |
733 | } | |
353632d9 | 734 | |
4b1ac34b NB |
735 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
736 | ||
737 | offset *= 512; | |
738 | ||
739 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
740 | ||
741 | if (lseek64(fd, offset, 0)< 0LL) { | |
742 | if (devname) | |
743 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
744 | devname, strerror(errno)); | |
745 | return 1; | |
746 | } | |
747 | ||
8d75b7fc | 748 | super = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b NB |
749 | |
750 | if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) { | |
751 | if (devname) | |
752 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
753 | devname); | |
754 | free(super); | |
755 | return 1; | |
756 | } | |
757 | ||
586ed405 NB |
758 | if (st->ss && st->minor_version == 9) |
759 | super0_swap_endian(super); | |
760 | ||
4b1ac34b NB |
761 | if (super->md_magic != MD_SB_MAGIC) { |
762 | if (devname) | |
763 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
764 | devname, MD_SB_MAGIC, super->md_magic); | |
765 | free(super); | |
766 | return 2; | |
767 | } | |
768 | ||
769 | if (super->major_version != 0) { | |
770 | if (devname) | |
771 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
772 | devname, super->major_version); | |
773 | free(super); | |
774 | return 2; | |
775 | } | |
776 | *sbp = super; | |
82d9eba6 NB |
777 | if (st->ss == NULL) { |
778 | st->ss = &super0; | |
779 | st->minor_version = 90; | |
ea329559 | 780 | st->max_devs = MD_SB_DISKS; |
82d9eba6 NB |
781 | } |
782 | ||
14263cf1 NB |
783 | /* Now check on the bitmap superblock */ |
784 | if ((super->state & (1<<MD_SB_BITMAP_PRESENT)) == 0) | |
785 | return 0; | |
786 | /* Read the bitmap superblock and make sure it looks | |
787 | * valid. If it doesn't clear the bit. An --assemble --force | |
788 | * should get that written out. | |
789 | */ | |
790 | if (read(fd, super+1, sizeof(struct bitmap_super_s)) | |
791 | != sizeof(struct bitmap_super_s)) | |
792 | goto no_bitmap; | |
793 | ||
794 | uuid_from_super0(uuid, super); | |
795 | bsb = (struct bitmap_super_s *)(super+1); | |
796 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
797 | memcmp(bsb->uuid, uuid, 16) != 0) | |
798 | goto no_bitmap; | |
799 | return 0; | |
800 | ||
801 | no_bitmap: | |
802 | super->state &= ~(1<<MD_SB_BITMAP_PRESENT); | |
803 | ||
4b1ac34b NB |
804 | return 0; |
805 | } | |
f9ce90ba | 806 | |
82d9eba6 | 807 | static struct supertype *match_metadata_desc0(char *arg) |
f9ce90ba | 808 | { |
82d9eba6 NB |
809 | struct supertype *st = malloc(sizeof(*st)); |
810 | if (!st) return st; | |
811 | ||
812 | st->ss = &super0; | |
813 | st->minor_version = 90; | |
ea329559 | 814 | st->max_devs = MD_SB_DISKS; |
f9ce90ba NB |
815 | if (strcmp(arg, "0") == 0 || |
816 | strcmp(arg, "0.90") == 0 || | |
817 | strcmp(arg, "default") == 0 | |
818 | ) | |
82d9eba6 NB |
819 | return st; |
820 | ||
586ed405 NB |
821 | st->minor_version = 9; /* flag for 'byte-swapped' */ |
822 | if (strcmp(arg, "0.swap")==0) | |
823 | return st; | |
824 | ||
82d9eba6 NB |
825 | free(st); |
826 | return NULL; | |
827 | } | |
828 | ||
1bf4e2d9 | 829 | static __u64 avail_size0(struct supertype *st, __u64 devsize) |
82d9eba6 NB |
830 | { |
831 | if (devsize < MD_RESERVED_SECTORS*2) | |
832 | return 0ULL; | |
833 | return MD_NEW_SIZE_SECTORS(devsize); | |
f9ce90ba NB |
834 | } |
835 | ||
f9c25f1d | 836 | 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 |
837 | { |
838 | /* | |
839 | * The bitmap comes immediately after the superblock and must be 60K in size | |
840 | * at most. The default size is between 30K and 60K | |
841 | * | |
8686f3ed | 842 | * size is in sectors, chunk is in bytes !!! |
55935d51 | 843 | */ |
1bf4e2d9 | 844 | unsigned long long bits; |
55935d51 NB |
845 | unsigned long long max_bits = 60*1024*8; |
846 | unsigned long long min_chunk; | |
847 | mdp_super_t *sb = sbv; | |
848 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES); | |
849 | ||
353632d9 | 850 | |
f277ce36 | 851 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ |
8686f3ed | 852 | bits = (size * 512) / min_chunk + 1; |
55935d51 NB |
853 | while (bits > max_bits) { |
854 | min_chunk *= 2; | |
855 | bits = (bits+1)/2; | |
856 | } | |
857 | if (chunk == UnSet) | |
858 | chunk = min_chunk; | |
859 | else if (chunk < min_chunk) | |
860 | return 0; /* chunk size too small */ | |
861 | ||
862 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); | |
863 | ||
29e766a5 | 864 | memset(bms, 0, sizeof(*bms)); |
dfd4d8ee | 865 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
dcec9ee5 | 866 | bms->version = __cpu_to_le32(major); |
55935d51 | 867 | uuid_from_super0((int*)bms->uuid, sb); |
dfd4d8ee NB |
868 | bms->chunksize = __cpu_to_le32(chunk); |
869 | bms->daemon_sleep = __cpu_to_le32(delay); | |
f9c25f1d | 870 | bms->sync_size = __cpu_to_le64(size); |
dfd4d8ee | 871 | bms->write_behind = __cpu_to_le32(write_behind); |
55935d51 | 872 | |
55935d51 NB |
873 | return 1; |
874 | } | |
353632d9 | 875 | |
55935d51 | 876 | |
f6d75de8 | 877 | void locate_bitmap0(struct supertype *st, int fd, void *sbv) |
55935d51 NB |
878 | { |
879 | unsigned long long dsize; | |
880 | unsigned long size; | |
881 | unsigned long long offset; | |
882 | #ifdef BLKGETSIZE64 | |
883 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
884 | #endif | |
885 | { | |
886 | if (ioctl(fd, BLKGETSIZE, &size)) | |
887 | return; | |
888 | else | |
889 | dsize = ((unsigned long long)size)<<9; | |
890 | } | |
891 | ||
892 | if (dsize < MD_RESERVED_SECTORS*2) | |
893 | return; | |
353632d9 | 894 | |
55935d51 NB |
895 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
896 | ||
897 | offset *= 512; | |
898 | ||
899 | offset += MD_SB_BYTES; | |
900 | ||
901 | lseek64(fd, offset, 0); | |
902 | } | |
903 | ||
8d75b7fc NB |
904 | int write_bitmap0(struct supertype *st, int fd, void *sbv) |
905 | { | |
906 | unsigned long size; | |
907 | unsigned long long dsize; | |
908 | unsigned long long offset; | |
909 | mdp_super_t *sb = sbv; | |
910 | ||
911 | int rv = 0; | |
912 | ||
913 | int towrite, n; | |
914 | char buf[4096]; | |
915 | ||
916 | #ifdef BLKGETSIZE64 | |
917 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
918 | #endif | |
919 | { | |
920 | if (ioctl(fd, BLKGETSIZE, &size)) | |
921 | return 1; | |
922 | else | |
923 | dsize = ((unsigned long long)size)<<9; | |
924 | } | |
925 | ||
926 | if (dsize < MD_RESERVED_SECTORS*2) | |
353632d9 NB |
927 | return -1; |
928 | ||
8d75b7fc NB |
929 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
930 | ||
931 | offset *= 512; | |
932 | ||
933 | if (lseek64(fd, offset + 4096, 0)< 0LL) | |
934 | return 3; | |
935 | ||
936 | ||
1e0d770c NB |
937 | if (write(fd, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t)) != |
938 | sizeof(bitmap_super_t)) | |
939 | return -2; | |
8d75b7fc NB |
940 | towrite = 64*1024 - MD_SB_BYTES - sizeof(bitmap_super_t); |
941 | memset(buf, 0xff, sizeof(buf)); | |
942 | while (towrite > 0) { | |
943 | n = towrite; | |
944 | if (n > sizeof(buf)) | |
945 | n = sizeof(buf); | |
946 | n = write(fd, buf, n); | |
947 | if (n > 0) | |
948 | towrite -= n; | |
949 | else | |
950 | break; | |
951 | } | |
dfd4d8ee | 952 | fsync(fd); |
8d75b7fc NB |
953 | if (towrite) |
954 | rv = -2; | |
955 | ||
956 | return rv; | |
957 | } | |
55935d51 | 958 | |
f9ce90ba | 959 | struct superswitch super0 = { |
c7654afc | 960 | #ifndef MDASSEMBLE |
f9ce90ba NB |
961 | .examine_super = examine_super0, |
962 | .brief_examine_super = brief_examine_super0, | |
963 | .detail_super = detail_super0, | |
964 | .brief_detail_super = brief_detail_super0, | |
c7654afc | 965 | #endif |
83b6208e | 966 | .match_home = match_home0, |
f9ce90ba NB |
967 | .uuid_from_super = uuid_from_super0, |
968 | .getinfo_super = getinfo_super0, | |
969 | .update_super = update_super0, | |
970 | .event_super = event_super0, | |
971 | .init_super = init_super0, | |
972 | .add_to_super = add_to_super0, | |
973 | .store_super = store_super0, | |
974 | .write_init_super = write_init_super0, | |
975 | .compare_super = compare_super0, | |
976 | .load_super = load_super0, | |
977 | .match_metadata_desc = match_metadata_desc0, | |
82d9eba6 | 978 | .avail_size = avail_size0, |
55935d51 NB |
979 | .add_internal_bitmap = add_internal_bitmap0, |
980 | .locate_bitmap = locate_bitmap0, | |
8d75b7fc | 981 | .write_bitmap = write_bitmap0, |
82d9eba6 | 982 | .major = 0, |
f277ce36 | 983 | .swapuuid = 0, |
f9ce90ba | 984 | }; |