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82d9eba6 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 | #include "asm/byteorder.h" | |
33 | /* | |
34 | * The version-1 superblock : | |
35 | * All numeric fields are little-endian. | |
36 | * | |
37 | * total size: 256 bytes plus 2 per device. | |
38 | * 1K allows 384 devices. | |
39 | */ | |
40 | struct mdp_superblock_1 { | |
41 | /* constant array information - 128 bytes */ | |
42 | __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */ | |
43 | __u32 major_version; /* 1 */ | |
44 | __u32 feature_map; /* 0 for now */ | |
45 | __u32 pad0; /* always set to 0 when writing */ | |
46 | ||
47 | __u8 set_uuid[16]; /* user-space generated. */ | |
48 | char set_name[32]; /* set and interpreted by user-space */ | |
49 | ||
50 | __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/ | |
51 | __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */ | |
52 | __u32 layout; /* only for raid5 currently */ | |
53 | __u64 size; /* used size of component devices, in 512byte sectors */ | |
54 | ||
55 | __u32 chunksize; /* in 512byte sectors */ | |
56 | __u32 raid_disks; | |
57 | __u8 pad1[128-96]; /* set to 0 when written */ | |
58 | ||
59 | /* constant this-device information - 64 bytes */ | |
60 | __u64 data_offset; /* sector start of data, often 0 */ | |
61 | __u64 data_size; /* sectors in this device that can be used for data */ | |
62 | __u64 super_offset; /* sector start of this superblock */ | |
63 | __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */ | |
64 | __u32 dev_number; /* permanent identifier of this device - not role in raid */ | |
65 | __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */ | |
66 | __u8 device_uuid[16]; /* user-space setable, ignored by kernel */ | |
67 | __u8 pad2[64-56]; /* set to 0 when writing */ | |
68 | ||
69 | /* array state information - 64 bytes */ | |
70 | __u64 utime; /* 40 bits second, 24 btes microseconds */ | |
71 | __u64 events; /* incremented when superblock updated */ | |
72 | __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */ | |
73 | __u32 sb_csum; /* checksum upto devs[max_dev] */ | |
74 | __u32 max_dev; /* size of devs[] array to consider */ | |
75 | __u8 pad3[64-32]; /* set to 0 when writing */ | |
76 | ||
77 | /* device state information. Indexed by dev_number. | |
78 | * 2 bytes per device | |
79 | * Note there are no per-device state flags. State information is rolled | |
80 | * into the 'roles' value. If a device is spare or faulty, then it doesn't | |
81 | * have a meaningful role. | |
82 | */ | |
83 | __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ | |
84 | }; | |
85 | ||
570c0542 | 86 | #ifndef offsetof |
82d9eba6 | 87 | #define offsetof(t,f) ((int)&(((t*)0)->f)) |
570c0542 | 88 | #endif |
82d9eba6 NB |
89 | static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb) |
90 | { | |
91 | unsigned int disk_csum, csum; | |
92 | unsigned long long newcsum; | |
93 | int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2; | |
94 | unsigned int *isuper = (unsigned int*)sb; | |
95 | int i; | |
96 | ||
97 | /* make sure I can count... */ | |
98 | if (offsetof(struct mdp_superblock_1,data_offset) != 128 || | |
99 | offsetof(struct mdp_superblock_1, utime) != 192 || | |
100 | sizeof(struct mdp_superblock_1) != 256) { | |
101 | fprintf(stderr, "WARNING - superblock isn't sized correctly\n"); | |
102 | } | |
103 | ||
104 | disk_csum = sb->sb_csum; | |
105 | sb->sb_csum = 0; | |
106 | newcsum = 0; | |
107 | for (i=0; size>=4; size -= 4 ) | |
108 | newcsum += __le32_to_cpu(*isuper++); | |
109 | ||
110 | if (size == 2) | |
111 | newcsum += __le16_to_cpu(*(unsigned short*) isuper); | |
112 | ||
113 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
114 | sb->sb_csum = disk_csum; | |
115 | return csum; | |
116 | } | |
117 | ||
c7654afc | 118 | #ifndef MDASSEMBLE |
82d9eba6 NB |
119 | static void examine_super1(void *sbv) |
120 | { | |
121 | struct mdp_superblock_1 *sb = sbv; | |
122 | time_t atime; | |
123 | int d; | |
6fbba4c9 | 124 | int faulty; |
82d9eba6 NB |
125 | int i; |
126 | char *c; | |
127 | ||
128 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
129 | printf(" Version : %02d.%02d\n", 1, __le32_to_cpu(sb->feature_map)); | |
130 | printf(" Array UUID : "); | |
131 | for (i=0; i<16; i++) { | |
132 | printf("%02x", sb->set_uuid[i]); | |
133 | if ((i&3)==0 && i != 0) printf(":"); | |
134 | } | |
135 | printf("\n"); | |
136 | printf(" Name : %.32s\n", sb->set_name); | |
137 | ||
138 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
139 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
140 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
141 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
142 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
143 | printf("\n"); | |
570c0542 | 144 | printf(" Device Size : %llu%s\n", (unsigned long long)sb->data_size, human_size(sb->data_size<<9)); |
82d9eba6 | 145 | if (sb->data_offset) |
570c0542 | 146 | printf(" Data Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->data_offset)); |
82d9eba6 | 147 | if (sb->super_offset) |
570c0542 | 148 | printf(" Super Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->super_offset)); |
a3fd117c | 149 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); |
82d9eba6 NB |
150 | printf(" Device UUID : "); |
151 | for (i=0; i<16; i++) { | |
152 | printf("%02x", sb->set_uuid[i]); | |
153 | if ((i&3)==0 && i != 0) printf(":"); | |
154 | } | |
155 | printf("\n"); | |
156 | ||
157 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
158 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
159 | ||
160 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
161 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
162 | else | |
163 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
164 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
570c0542 | 165 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
166 | printf("\n"); |
167 | if (__le32_to_cpu(sb->level) == 5) { | |
168 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
169 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
170 | } | |
171 | switch(__le32_to_cpu(sb->level)) { | |
172 | case 0: | |
173 | case 4: | |
174 | case 5: | |
175 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize/2)); | |
176 | break; | |
177 | case -1: | |
178 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize/2)); | |
179 | break; | |
180 | default: break; | |
181 | } | |
182 | printf("\n"); | |
183 | printf(" Array State : "); | |
184 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
185 | int cnt = 0; | |
186 | int me = 0; | |
187 | int i; | |
188 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
189 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
190 | if (role == d) { | |
191 | if (i == __le32_to_cpu(sb->dev_number)) | |
192 | me = 1; | |
193 | cnt++; | |
194 | } | |
195 | } | |
196 | if (cnt > 1) printf("?"); | |
197 | else if (cnt == 1 && me) printf("U"); | |
198 | else if (cnt == 1) printf("u"); | |
199 | else printf ("_"); | |
200 | } | |
6fbba4c9 | 201 | faulty = 0; |
82d9eba6 NB |
202 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
203 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
6fbba4c9 NB |
204 | if (role == 0xFFFE) |
205 | faulty++; | |
82d9eba6 | 206 | } |
82d9eba6 NB |
207 | if (faulty) printf(" %d failed", faulty); |
208 | printf("\n"); | |
209 | } | |
210 | ||
211 | ||
212 | static void brief_examine_super1(void *sbv) | |
213 | { | |
214 | struct mdp_superblock_1 *sb = sbv; | |
215 | int i; | |
216 | ||
217 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
218 | ||
219 | printf("ARRAY /dev/?? level=%s metadata=1 num-devices=%d UUID=", | |
220 | c?c:"-unknown-", sb->raid_disks); | |
221 | for (i=0; i<16; i++) { | |
222 | printf("%02x", sb->set_uuid[i]); | |
223 | if ((i&3)==0 && i != 0) printf(":"); | |
224 | } | |
225 | printf("\n"); | |
226 | } | |
227 | ||
228 | static void detail_super1(void *sbv) | |
229 | { | |
230 | struct mdp_superblock_1 *sb = sbv; | |
231 | int i; | |
232 | ||
233 | printf(" UUID : "); | |
234 | for (i=0; i<16; i++) { | |
235 | printf("%02x", sb->set_uuid[i]); | |
236 | if ((i&3)==0 && i != 0) printf(":"); | |
237 | } | |
570c0542 | 238 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
239 | } |
240 | ||
241 | static void brief_detail_super1(void *sbv) | |
242 | { | |
243 | struct mdp_superblock_1 *sb = sbv; | |
244 | int i; | |
245 | ||
246 | printf(" UUID="); | |
247 | for (i=0; i<16; i++) { | |
248 | printf("%02x", sb->set_uuid[i]); | |
249 | if ((i&3)==0 && i != 0) printf(":"); | |
250 | } | |
251 | } | |
252 | ||
c7654afc NB |
253 | #endif |
254 | ||
82d9eba6 NB |
255 | static void uuid_from_super1(int uuid[4], void * sbv) |
256 | { | |
257 | struct mdp_superblock_1 *super = sbv; | |
258 | char *cuuid = (char*)uuid; | |
259 | int i; | |
260 | for (i=0; i<16; i++) | |
261 | cuuid[i] = super->set_uuid[i]; | |
262 | } | |
263 | ||
264 | static void getinfo_super1(struct mdinfo *info, void *sbv) | |
265 | { | |
266 | struct mdp_superblock_1 *sb = sbv; | |
267 | int working = 0; | |
268 | int i; | |
269 | int role; | |
270 | ||
271 | info->array.major_version = 1; | |
272 | info->array.minor_version = __le32_to_cpu(sb->feature_map); | |
273 | info->array.patch_version = 0; | |
274 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
275 | info->array.level = __le32_to_cpu(sb->level); | |
276 | info->array.md_minor = -1; | |
277 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
278 | ||
279 | info->disk.major = 0; | |
280 | info->disk.minor = 0; | |
fbf8a0b7 | 281 | info->disk.number = __le32_to_cpu(sb->dev_number); |
82d9eba6 NB |
282 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || |
283 | __le32_to_cpu(sb->max_dev) > 512) | |
284 | role = 0xfffe; | |
285 | else | |
286 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
287 | ||
288 | info->disk.raid_disk = -1; | |
289 | switch(role) { | |
290 | case 0xFFFF: | |
291 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
292 | break; | |
293 | case 0xFFFE: | |
294 | info->disk.state = 1; /* faulty */ | |
295 | break; | |
296 | default: | |
297 | info->disk.state = 6; /* active and in sync */ | |
298 | info->disk.raid_disk = role; | |
299 | } | |
300 | info->events = __le64_to_cpu(sb->events); | |
301 | ||
302 | memcpy(info->uuid, sb->set_uuid, 16); | |
303 | ||
304 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
305 | role = __le16_to_cpu(sb->dev_roles[i]); | |
fbf8a0b7 | 306 | if (/*role == 0xFFFF || */role < info->array.raid_disks) |
82d9eba6 NB |
307 | working++; |
308 | } | |
309 | ||
310 | info->array.working_disks = working; | |
311 | } | |
312 | ||
313 | static int update_super1(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose) | |
314 | { | |
315 | int rv = 0; | |
316 | struct mdp_superblock_1 *sb = sbv; | |
317 | ||
318 | if (strcmp(update, "force")==0) { | |
319 | sb->events = __cpu_to_le32(info->events); | |
320 | switch(__le32_to_cpu(sb->level)) { | |
321 | case 5: case 4: case 6: | |
322 | /* need to force clean */ | |
323 | sb->resync_offset = ~0ULL; | |
324 | } | |
325 | } | |
326 | if (strcmp(update, "assemble")==0) { | |
327 | int d = info->disk.number; | |
328 | int want; | |
329 | if (info->disk.state == 6) | |
330 | want = __cpu_to_le32(info->disk.raid_disk); | |
331 | else | |
332 | want = 0xFFFF; | |
333 | if (sb->dev_roles[d] != want) { | |
334 | sb->dev_roles[d] = want; | |
335 | rv = 1; | |
336 | } | |
337 | } | |
338 | #if 0 | |
339 | if (strcmp(update, "newdev") == 0) { | |
340 | int d = info->disk.number; | |
341 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
342 | sb->disks[d].number = d; | |
343 | sb->disks[d].major = info->disk.major; | |
344 | sb->disks[d].minor = info->disk.minor; | |
345 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
346 | sb->disks[d].state = info->disk.state; | |
347 | sb->this_disk = sb->disks[d]; | |
348 | } | |
349 | #endif | |
350 | if (strcmp(update, "grow") == 0) { | |
351 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
352 | /* FIXME */ | |
353 | } | |
354 | if (strcmp(update, "resync") == 0) { | |
355 | /* make sure resync happens */ | |
356 | sb->resync_offset = ~0ULL; | |
357 | } | |
358 | ||
359 | sb->sb_csum = calc_sb_1_csum(sb); | |
360 | return rv; | |
361 | } | |
362 | ||
363 | ||
364 | static __u64 event_super1(void *sbv) | |
365 | { | |
366 | struct mdp_superblock_1 *sb = sbv; | |
367 | return __le64_to_cpu(sb->events); | |
368 | } | |
369 | ||
96395475 | 370 | static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info) |
82d9eba6 NB |
371 | { |
372 | struct mdp_superblock_1 *sb = malloc(1024); | |
373 | int spares; | |
374 | memset(sb, 0, 1024); | |
375 | ||
376 | if (info->major_version == -1) | |
377 | /* zeroing superblock */ | |
378 | return 0; | |
379 | ||
380 | spares = info->working_disks - info->active_disks; | |
381 | if (info->raid_disks + spares > 384) { | |
382 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
383 | info->raid_disks , spares, 384); | |
384 | return 0; | |
385 | } | |
386 | ||
387 | ||
388 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
389 | sb->major_version = __cpu_to_le32(1); | |
390 | sb->feature_map = 0; | |
391 | sb->pad0 = 0; | |
392 | *(__u32*)(sb->set_uuid) = random(); | |
393 | *(__u32*)(sb->set_uuid+4) = random(); | |
394 | *(__u32*)(sb->set_uuid+8) = random(); | |
395 | *(__u32*)(sb->set_uuid+12) = random(); | |
396 | ||
397 | /* FIXME name */ | |
398 | ||
399 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
400 | sb->level = __cpu_to_le32(info->level); | |
ea329559 | 401 | sb->layout = __cpu_to_le32(info->layout); |
82d9eba6 NB |
402 | sb->size = __cpu_to_le64(info->size*2ULL); |
403 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
404 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
405 | ||
406 | sb->data_offset = __cpu_to_le64(0); | |
407 | sb->data_size = __cpu_to_le64(0); | |
408 | sb->super_offset = __cpu_to_le64(0); | |
409 | sb->recovery_offset = __cpu_to_le64(0); | |
410 | ||
411 | sb->utime = sb->ctime; | |
412 | sb->events = __cpu_to_le64(1); | |
34321279 | 413 | if (info->state & (1<<MD_SB_CLEAN)) |
82d9eba6 NB |
414 | sb->resync_offset = ~0ULL; |
415 | else | |
416 | sb->resync_offset = 0; | |
417 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ | |
418 | sizeof(sb->dev_roles[0])); | |
419 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
420 | ||
421 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
422 | ||
423 | *sbp = sb; | |
424 | return 1; | |
425 | } | |
426 | ||
427 | /* Add a device to the superblock being created */ | |
428 | static void add_to_super1(void *sbv, mdu_disk_info_t *dk) | |
429 | { | |
430 | struct mdp_superblock_1 *sb = sbv; | |
431 | __u16 *rp = sb->dev_roles + dk->number; | |
432 | if (dk->state == 6) /* active, sync */ | |
433 | *rp = __cpu_to_le16(dk->raid_disk); | |
412ca2e5 | 434 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ |
82d9eba6 NB |
435 | *rp = 0xffff; |
436 | else | |
437 | *rp = 0xfffe; | |
438 | } | |
439 | ||
96395475 | 440 | static int store_super1(struct supertype *st, int fd, void *sbv) |
82d9eba6 NB |
441 | { |
442 | struct mdp_superblock_1 *sb = sbv; | |
6fbba4c9 | 443 | unsigned long long sb_offset; |
82d9eba6 | 444 | int sbsize; |
96395475 NB |
445 | long size; |
446 | ||
447 | if (ioctl(fd, BLKGETSIZE, &size)) | |
448 | return 1; | |
449 | ||
450 | ||
451 | if (size < 24) | |
452 | return 2; | |
453 | ||
454 | /* | |
455 | * Calculate the position of the superblock. | |
456 | * It is always aligned to a 4K boundary and | |
457 | * depending on minor_version, it can be: | |
458 | * 0: At least 8K, but less than 12K, from end of device | |
459 | * 1: At start of device | |
460 | * 2: 4K from start of device. | |
461 | */ | |
462 | switch(st->minor_version) { | |
463 | case 0: | |
464 | sb_offset = size; | |
465 | sb_offset -= 8*2; | |
466 | sb_offset &= ~(4*2-1); | |
467 | break; | |
468 | case 1: | |
6fbba4c9 | 469 | sb_offset = 0; |
96395475 NB |
470 | break; |
471 | case 2: | |
472 | sb_offset = 4*2; | |
473 | break; | |
474 | default: | |
475 | return -EINVAL; | |
476 | } | |
477 | ||
82d9eba6 NB |
478 | |
479 | ||
6fbba4c9 NB |
480 | if (sb_offset != __le64_to_cpu(sb->super_offset) && |
481 | 0 != __le64_to_cpu(sb->super_offset) | |
96395475 NB |
482 | ) { |
483 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
484 | abort(); | |
485 | } | |
82d9eba6 | 486 | |
6fbba4c9 | 487 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) |
82d9eba6 NB |
488 | return 3; |
489 | ||
490 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
491 | ||
492 | if (write(fd, sb, sbsize) != sbsize) | |
493 | return 4; | |
494 | ||
570c0542 | 495 | fsync(fd); |
82d9eba6 NB |
496 | return 0; |
497 | } | |
498 | ||
892debc8 NB |
499 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname); |
500 | ||
82d9eba6 NB |
501 | static int write_init_super1(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname) |
502 | { | |
503 | struct mdp_superblock_1 *sb = sbv; | |
892debc8 NB |
504 | struct mdp_superblock_1 *refsb = NULL; |
505 | int fd = open(devname, O_RDWR | O_EXCL); | |
dfe47e00 | 506 | int rfd; |
82d9eba6 NB |
507 | int rv; |
508 | ||
509 | long size; | |
510 | long long sb_offset; | |
511 | ||
512 | ||
513 | if (fd < 0) { | |
514 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", | |
515 | devname); | |
516 | return -1; | |
517 | } | |
518 | ||
519 | sb->dev_number = __cpu_to_le32(dinfo->number); | |
892debc8 | 520 | |
dfe47e00 NB |
521 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
522 | read(rfd, sb->device_uuid, 16) != 16) { | |
523 | *(__u32*)(sb->device_uuid) = random(); | |
524 | *(__u32*)(sb->device_uuid+4) = random(); | |
525 | *(__u32*)(sb->device_uuid+8) = random(); | |
526 | *(__u32*)(sb->device_uuid+12) = random(); | |
527 | } | |
528 | if (rfd >= 0) close(rfd); | |
892debc8 NB |
529 | sb->events = 0; |
530 | ||
531 | if (load_super1(st, fd, (void**)&refsb, NULL)==0) { | |
532 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
533 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
534 | /* same array, so preserve events and dev_number */ | |
535 | sb->events = refsb->events; | |
536 | sb->dev_number = refsb->dev_number; | |
537 | } | |
538 | free(refsb); | |
539 | } | |
82d9eba6 | 540 | |
024ce7fe NB |
541 | if (ioctl(fd, BLKGETSIZE, &size)) { |
542 | close(fd); | |
82d9eba6 | 543 | return 1; |
024ce7fe | 544 | } |
82d9eba6 | 545 | |
024ce7fe NB |
546 | if (size < 24) { |
547 | close(fd); | |
82d9eba6 | 548 | return 2; |
024ce7fe | 549 | } |
82d9eba6 NB |
550 | |
551 | ||
552 | /* | |
553 | * Calculate the position of the superblock. | |
554 | * It is always aligned to a 4K boundary and | |
555 | * depending on minor_version, it can be: | |
556 | * 0: At least 8K, but less than 12K, from end of device | |
557 | * 1: At start of device | |
558 | * 2: 4K from start of device. | |
559 | */ | |
560 | switch(st->minor_version) { | |
561 | case 0: | |
562 | sb_offset = size; | |
563 | sb_offset -= 8*2; | |
564 | sb_offset &= ~(4*2-1); | |
565 | sb->super_offset = __cpu_to_le64(sb_offset); | |
566 | sb->data_offset = __cpu_to_le64(0); | |
567 | sb->data_size = sb->super_offset; | |
568 | break; | |
569 | case 1: | |
570 | sb->super_offset = __cpu_to_le64(0); | |
571 | sb->data_offset = __cpu_to_le64(2); | |
572 | sb->data_size = __cpu_to_le64(size - 2); | |
573 | break; | |
574 | case 2: | |
575 | sb_offset = 4*2; | |
576 | sb->super_offset = __cpu_to_le64(sb_offset); | |
577 | sb->data_offset = __cpu_to_le64(sb_offset+2); | |
578 | sb->data_size = __cpu_to_le64(size - 4*2 - 2); | |
579 | break; | |
580 | default: | |
581 | return -EINVAL; | |
582 | } | |
583 | ||
584 | ||
585 | sb->sb_csum = calc_sb_1_csum(sb); | |
96395475 | 586 | rv = store_super1(st, fd, sb); |
82d9eba6 NB |
587 | if (rv) |
588 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
024ce7fe | 589 | close(fd); |
82d9eba6 NB |
590 | return rv; |
591 | } | |
592 | ||
593 | static int compare_super1(void **firstp, void *secondv) | |
594 | { | |
595 | /* | |
596 | * return: | |
597 | * 0 same, or first was empty, and second was copied | |
598 | * 1 second had wrong number | |
599 | * 2 wrong uuid | |
600 | * 3 wrong other info | |
601 | */ | |
602 | struct mdp_superblock_1 *first = *firstp; | |
603 | struct mdp_superblock_1 *second = secondv; | |
604 | ||
605 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
606 | return 1; | |
607 | if (second->major_version != __cpu_to_le32(1)) | |
608 | return 1; | |
609 | ||
610 | if (!first) { | |
611 | first = malloc(1024); | |
612 | memcpy(first, second, 1024); | |
613 | *firstp = first; | |
614 | return 0; | |
615 | } | |
616 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
617 | return 2; | |
618 | ||
619 | if (first->ctime != second->ctime || | |
620 | first->level != second->level || | |
621 | first->layout != second->layout || | |
622 | first->size != second->size || | |
623 | first->chunksize != second->chunksize || | |
624 | first->raid_disks != second->raid_disks) | |
625 | return 3; | |
626 | return 0; | |
627 | } | |
628 | ||
629 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname) | |
630 | { | |
631 | unsigned long size; | |
632 | unsigned long long sb_offset; | |
633 | struct mdp_superblock_1 *super; | |
634 | ||
635 | ||
636 | ||
637 | if (st->ss == NULL) { | |
570c0542 NB |
638 | int bestvers = -1; |
639 | __u64 bestctime = 0; | |
640 | /* guess... choose latest ctime */ | |
82d9eba6 NB |
641 | st->ss = &super1; |
642 | for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) { | |
643 | switch(load_super1(st, fd, sbp, devname)) { | |
570c0542 NB |
644 | case 0: super = *sbp; |
645 | if (bestvers == -1 || | |
646 | bestctime < __le64_to_cpu(super->ctime)) { | |
647 | bestvers = st->minor_version; | |
648 | bestctime = __le64_to_cpu(super->ctime); | |
649 | } | |
650 | free(super); | |
651 | *sbp = NULL; | |
652 | break; | |
82d9eba6 NB |
653 | case 1: st->ss = NULL; return 1; /*bad device */ |
654 | case 2: break; /* bad, try next */ | |
655 | } | |
656 | } | |
570c0542 NB |
657 | if (bestvers != -1) { |
658 | int rv; | |
659 | st->minor_version = bestvers; | |
660 | st->ss = &super1; | |
ea329559 | 661 | st->max_devs = 384; |
570c0542 NB |
662 | rv = load_super1(st, fd, sbp, devname); |
663 | if (rv) st->ss = NULL; | |
664 | return rv; | |
665 | } | |
82d9eba6 NB |
666 | st->ss = NULL; |
667 | return 2; | |
668 | } | |
669 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
670 | if (devname) | |
671 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
672 | devname, strerror(errno)); | |
673 | return 1; | |
674 | } | |
675 | ||
676 | if (size < 24) { | |
677 | if (devname) | |
678 | fprintf(stderr, Name ": %s is too small for md: size is %lu sectors.\n", | |
679 | devname, size); | |
680 | return 1; | |
681 | } | |
682 | ||
683 | /* | |
684 | * Calculate the position of the superblock. | |
685 | * It is always aligned to a 4K boundary and | |
686 | * depeding on minor_version, it can be: | |
687 | * 0: At least 8K, but less than 12K, from end of device | |
688 | * 1: At start of device | |
689 | * 2: 4K from start of device. | |
690 | */ | |
691 | switch(st->minor_version) { | |
692 | case 0: | |
693 | sb_offset = size; | |
694 | sb_offset -= 8*2; | |
695 | sb_offset &= ~(4*2-1); | |
696 | break; | |
697 | case 1: | |
698 | sb_offset = 0; | |
699 | break; | |
700 | case 2: | |
701 | sb_offset = 4*2; | |
702 | break; | |
703 | default: | |
704 | return -EINVAL; | |
705 | } | |
706 | ||
707 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
708 | ||
709 | ||
710 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
711 | if (devname) | |
712 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
713 | devname, strerror(errno)); | |
714 | return 1; | |
715 | } | |
716 | ||
717 | super = malloc(1024); | |
718 | ||
719 | if (read(fd, super, 1024) != 1024) { | |
720 | if (devname) | |
721 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
722 | devname); | |
723 | free(super); | |
724 | return 1; | |
725 | } | |
726 | ||
727 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
728 | if (devname) | |
729 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
730 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
731 | free(super); | |
732 | return 2; | |
733 | } | |
734 | ||
735 | if (__le32_to_cpu(super->major_version) != 1) { | |
736 | if (devname) | |
737 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
738 | devname, __le32_to_cpu(super->major_version)); | |
739 | free(super); | |
740 | return 2; | |
741 | } | |
742 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
743 | if (devname) | |
744 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
745 | devname); | |
746 | free(super); | |
747 | return 2; | |
748 | } | |
749 | *sbp = super; | |
750 | return 0; | |
751 | } | |
752 | ||
753 | ||
754 | static struct supertype *match_metadata_desc1(char *arg) | |
755 | { | |
756 | struct supertype *st = malloc(sizeof(*st)); | |
757 | if (!st) return st; | |
758 | ||
759 | st->ss = &super1; | |
ea329559 | 760 | st->max_devs = 384; |
82d9eba6 NB |
761 | if (strcmp(arg, "1") == 0 || |
762 | strcmp(arg, "1.0") == 0) { | |
763 | st->minor_version = 0; | |
764 | return st; | |
765 | } | |
766 | if (strcmp(arg, "1.1") == 0) { | |
767 | st->minor_version = 1; | |
768 | return st; | |
769 | } | |
770 | if (strcmp(arg, "1.2") == 0) { | |
771 | st->minor_version = 2; | |
772 | return st; | |
773 | } | |
774 | ||
775 | free(st); | |
776 | return NULL; | |
777 | } | |
778 | ||
779 | static __u64 avail_size1(__u64 devsize) | |
780 | { | |
781 | if (devsize < 24) | |
782 | return 0; | |
783 | ||
784 | return (devsize - 8*2 ) & ~(4*2-1); | |
785 | } | |
786 | ||
787 | struct superswitch super1 = { | |
c7654afc | 788 | #ifndef MDASSEMBLE |
82d9eba6 NB |
789 | .examine_super = examine_super1, |
790 | .brief_examine_super = brief_examine_super1, | |
791 | .detail_super = detail_super1, | |
792 | .brief_detail_super = brief_detail_super1, | |
c7654afc | 793 | #endif |
82d9eba6 NB |
794 | .uuid_from_super = uuid_from_super1, |
795 | .getinfo_super = getinfo_super1, | |
796 | .update_super = update_super1, | |
797 | .event_super = event_super1, | |
798 | .init_super = init_super1, | |
799 | .add_to_super = add_to_super1, | |
800 | .store_super = store_super1, | |
801 | .write_init_super = write_init_super1, | |
802 | .compare_super = compare_super1, | |
803 | .load_super = load_super1, | |
804 | .match_metadata_desc = match_metadata_desc1, | |
805 | .avail_size = avail_size1, | |
806 | .major = 1, | |
807 | }; |