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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" | |
f277ce36 | 31 | #include <endian.h> |
82d9eba6 NB |
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 */ | |
dfd4d8ee NB |
67 | __u8 devflags; /* per-device flags. Only one defined...*/ |
68 | #define WriteMostly1 1 /* mask for writemostly flag in above */ | |
69 | __u8 pad2[64-57]; /* set to 0 when writing */ | |
82d9eba6 NB |
70 | |
71 | /* array state information - 64 bytes */ | |
72 | __u64 utime; /* 40 bits second, 24 btes microseconds */ | |
73 | __u64 events; /* incremented when superblock updated */ | |
74 | __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */ | |
75 | __u32 sb_csum; /* checksum upto devs[max_dev] */ | |
76 | __u32 max_dev; /* size of devs[] array to consider */ | |
77 | __u8 pad3[64-32]; /* set to 0 when writing */ | |
78 | ||
79 | /* device state information. Indexed by dev_number. | |
80 | * 2 bytes per device | |
81 | * Note there are no per-device state flags. State information is rolled | |
82 | * into the 'roles' value. If a device is spare or faulty, then it doesn't | |
83 | * have a meaningful role. | |
84 | */ | |
85 | __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ | |
86 | }; | |
87 | ||
570c0542 | 88 | #ifndef offsetof |
82d9eba6 | 89 | #define offsetof(t,f) ((int)&(((t*)0)->f)) |
570c0542 | 90 | #endif |
82d9eba6 NB |
91 | static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb) |
92 | { | |
93 | unsigned int disk_csum, csum; | |
94 | unsigned long long newcsum; | |
95 | int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2; | |
96 | unsigned int *isuper = (unsigned int*)sb; | |
97 | int i; | |
98 | ||
99 | /* make sure I can count... */ | |
100 | if (offsetof(struct mdp_superblock_1,data_offset) != 128 || | |
101 | offsetof(struct mdp_superblock_1, utime) != 192 || | |
102 | sizeof(struct mdp_superblock_1) != 256) { | |
103 | fprintf(stderr, "WARNING - superblock isn't sized correctly\n"); | |
104 | } | |
105 | ||
106 | disk_csum = sb->sb_csum; | |
107 | sb->sb_csum = 0; | |
108 | newcsum = 0; | |
109 | for (i=0; size>=4; size -= 4 ) | |
110 | newcsum += __le32_to_cpu(*isuper++); | |
111 | ||
112 | if (size == 2) | |
113 | newcsum += __le16_to_cpu(*(unsigned short*) isuper); | |
114 | ||
115 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
116 | sb->sb_csum = disk_csum; | |
117 | return csum; | |
118 | } | |
119 | ||
c7654afc | 120 | #ifndef MDASSEMBLE |
82d9eba6 NB |
121 | static void examine_super1(void *sbv) |
122 | { | |
123 | struct mdp_superblock_1 *sb = sbv; | |
124 | time_t atime; | |
125 | int d; | |
6fbba4c9 | 126 | int faulty; |
82d9eba6 NB |
127 | int i; |
128 | char *c; | |
129 | ||
130 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
131 | printf(" Version : %02d.%02d\n", 1, __le32_to_cpu(sb->feature_map)); | |
132 | printf(" Array UUID : "); | |
133 | for (i=0; i<16; i++) { | |
134 | printf("%02x", sb->set_uuid[i]); | |
135 | if ((i&3)==0 && i != 0) printf(":"); | |
136 | } | |
137 | printf("\n"); | |
138 | printf(" Name : %.32s\n", sb->set_name); | |
139 | ||
140 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
141 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
142 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
143 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
144 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
145 | printf("\n"); | |
570c0542 | 146 | printf(" Device Size : %llu%s\n", (unsigned long long)sb->data_size, human_size(sb->data_size<<9)); |
82d9eba6 | 147 | if (sb->data_offset) |
570c0542 | 148 | printf(" Data Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->data_offset)); |
82d9eba6 | 149 | if (sb->super_offset) |
570c0542 | 150 | printf(" Super Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->super_offset)); |
a3fd117c | 151 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); |
82d9eba6 NB |
152 | printf(" Device UUID : "); |
153 | for (i=0; i<16; i++) { | |
154 | printf("%02x", sb->set_uuid[i]); | |
155 | if ((i&3)==0 && i != 0) printf(":"); | |
156 | } | |
157 | printf("\n"); | |
dfd4d8ee NB |
158 | if (sb->devflags) { |
159 | printf(" Flags :"); | |
160 | if (sb->devflags & WriteMostly1) | |
161 | printf(" write-mostly"); | |
162 | printf("\n"); | |
163 | } | |
82d9eba6 NB |
164 | |
165 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
166 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
167 | ||
168 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
169 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
170 | else | |
171 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
172 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
570c0542 | 173 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
174 | printf("\n"); |
175 | if (__le32_to_cpu(sb->level) == 5) { | |
176 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
177 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
178 | } | |
179 | switch(__le32_to_cpu(sb->level)) { | |
180 | case 0: | |
181 | case 4: | |
182 | case 5: | |
183 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize/2)); | |
184 | break; | |
185 | case -1: | |
186 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize/2)); | |
187 | break; | |
188 | default: break; | |
189 | } | |
190 | printf("\n"); | |
191 | printf(" Array State : "); | |
192 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
193 | int cnt = 0; | |
194 | int me = 0; | |
195 | int i; | |
196 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
197 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
198 | if (role == d) { | |
199 | if (i == __le32_to_cpu(sb->dev_number)) | |
200 | me = 1; | |
201 | cnt++; | |
202 | } | |
203 | } | |
204 | if (cnt > 1) printf("?"); | |
205 | else if (cnt == 1 && me) printf("U"); | |
206 | else if (cnt == 1) printf("u"); | |
207 | else printf ("_"); | |
208 | } | |
6fbba4c9 | 209 | faulty = 0; |
82d9eba6 NB |
210 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
211 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
6fbba4c9 NB |
212 | if (role == 0xFFFE) |
213 | faulty++; | |
82d9eba6 | 214 | } |
82d9eba6 NB |
215 | if (faulty) printf(" %d failed", faulty); |
216 | printf("\n"); | |
217 | } | |
218 | ||
219 | ||
220 | static void brief_examine_super1(void *sbv) | |
221 | { | |
222 | struct mdp_superblock_1 *sb = sbv; | |
223 | int i; | |
224 | ||
225 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
226 | ||
227 | printf("ARRAY /dev/?? level=%s metadata=1 num-devices=%d UUID=", | |
228 | c?c:"-unknown-", sb->raid_disks); | |
229 | for (i=0; i<16; i++) { | |
230 | printf("%02x", sb->set_uuid[i]); | |
231 | if ((i&3)==0 && i != 0) printf(":"); | |
232 | } | |
233 | printf("\n"); | |
234 | } | |
235 | ||
236 | static void detail_super1(void *sbv) | |
237 | { | |
238 | struct mdp_superblock_1 *sb = sbv; | |
239 | int i; | |
240 | ||
241 | printf(" UUID : "); | |
242 | for (i=0; i<16; i++) { | |
243 | printf("%02x", sb->set_uuid[i]); | |
244 | if ((i&3)==0 && i != 0) printf(":"); | |
245 | } | |
570c0542 | 246 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
247 | } |
248 | ||
249 | static void brief_detail_super1(void *sbv) | |
250 | { | |
251 | struct mdp_superblock_1 *sb = sbv; | |
252 | int i; | |
253 | ||
254 | printf(" UUID="); | |
255 | for (i=0; i<16; i++) { | |
256 | printf("%02x", sb->set_uuid[i]); | |
257 | if ((i&3)==0 && i != 0) printf(":"); | |
258 | } | |
259 | } | |
260 | ||
c7654afc NB |
261 | #endif |
262 | ||
82d9eba6 NB |
263 | static void uuid_from_super1(int uuid[4], void * sbv) |
264 | { | |
265 | struct mdp_superblock_1 *super = sbv; | |
266 | char *cuuid = (char*)uuid; | |
267 | int i; | |
268 | for (i=0; i<16; i++) | |
269 | cuuid[i] = super->set_uuid[i]; | |
270 | } | |
271 | ||
272 | static void getinfo_super1(struct mdinfo *info, void *sbv) | |
273 | { | |
274 | struct mdp_superblock_1 *sb = sbv; | |
275 | int working = 0; | |
276 | int i; | |
277 | int role; | |
278 | ||
279 | info->array.major_version = 1; | |
280 | info->array.minor_version = __le32_to_cpu(sb->feature_map); | |
281 | info->array.patch_version = 0; | |
282 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
283 | info->array.level = __le32_to_cpu(sb->level); | |
284 | info->array.md_minor = -1; | |
285 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
286 | ||
287 | info->disk.major = 0; | |
288 | info->disk.minor = 0; | |
fbf8a0b7 | 289 | info->disk.number = __le32_to_cpu(sb->dev_number); |
82d9eba6 NB |
290 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || |
291 | __le32_to_cpu(sb->max_dev) > 512) | |
292 | role = 0xfffe; | |
293 | else | |
294 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
295 | ||
296 | info->disk.raid_disk = -1; | |
297 | switch(role) { | |
298 | case 0xFFFF: | |
299 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
300 | break; | |
301 | case 0xFFFE: | |
302 | info->disk.state = 1; /* faulty */ | |
303 | break; | |
304 | default: | |
305 | info->disk.state = 6; /* active and in sync */ | |
306 | info->disk.raid_disk = role; | |
307 | } | |
308 | info->events = __le64_to_cpu(sb->events); | |
309 | ||
310 | memcpy(info->uuid, sb->set_uuid, 16); | |
311 | ||
312 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
313 | role = __le16_to_cpu(sb->dev_roles[i]); | |
fbf8a0b7 | 314 | if (/*role == 0xFFFF || */role < info->array.raid_disks) |
82d9eba6 NB |
315 | working++; |
316 | } | |
317 | ||
318 | info->array.working_disks = working; | |
319 | } | |
320 | ||
321 | static int update_super1(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose) | |
322 | { | |
323 | int rv = 0; | |
324 | struct mdp_superblock_1 *sb = sbv; | |
325 | ||
326 | if (strcmp(update, "force")==0) { | |
327 | sb->events = __cpu_to_le32(info->events); | |
328 | switch(__le32_to_cpu(sb->level)) { | |
329 | case 5: case 4: case 6: | |
330 | /* need to force clean */ | |
331 | sb->resync_offset = ~0ULL; | |
332 | } | |
333 | } | |
334 | if (strcmp(update, "assemble")==0) { | |
335 | int d = info->disk.number; | |
336 | int want; | |
337 | if (info->disk.state == 6) | |
338 | want = __cpu_to_le32(info->disk.raid_disk); | |
339 | else | |
340 | want = 0xFFFF; | |
341 | if (sb->dev_roles[d] != want) { | |
342 | sb->dev_roles[d] = want; | |
343 | rv = 1; | |
344 | } | |
345 | } | |
346 | #if 0 | |
347 | if (strcmp(update, "newdev") == 0) { | |
348 | int d = info->disk.number; | |
349 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
350 | sb->disks[d].number = d; | |
351 | sb->disks[d].major = info->disk.major; | |
352 | sb->disks[d].minor = info->disk.minor; | |
353 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
354 | sb->disks[d].state = info->disk.state; | |
355 | sb->this_disk = sb->disks[d]; | |
356 | } | |
357 | #endif | |
358 | if (strcmp(update, "grow") == 0) { | |
359 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
360 | /* FIXME */ | |
361 | } | |
362 | if (strcmp(update, "resync") == 0) { | |
363 | /* make sure resync happens */ | |
364 | sb->resync_offset = ~0ULL; | |
365 | } | |
366 | ||
367 | sb->sb_csum = calc_sb_1_csum(sb); | |
368 | return rv; | |
369 | } | |
370 | ||
371 | ||
372 | static __u64 event_super1(void *sbv) | |
373 | { | |
374 | struct mdp_superblock_1 *sb = sbv; | |
375 | return __le64_to_cpu(sb->events); | |
376 | } | |
377 | ||
96395475 | 378 | static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info) |
82d9eba6 NB |
379 | { |
380 | struct mdp_superblock_1 *sb = malloc(1024); | |
381 | int spares; | |
382 | memset(sb, 0, 1024); | |
383 | ||
384 | if (info->major_version == -1) | |
385 | /* zeroing superblock */ | |
386 | return 0; | |
387 | ||
388 | spares = info->working_disks - info->active_disks; | |
389 | if (info->raid_disks + spares > 384) { | |
390 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
391 | info->raid_disks , spares, 384); | |
392 | return 0; | |
393 | } | |
394 | ||
395 | ||
396 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
397 | sb->major_version = __cpu_to_le32(1); | |
398 | sb->feature_map = 0; | |
399 | sb->pad0 = 0; | |
400 | *(__u32*)(sb->set_uuid) = random(); | |
401 | *(__u32*)(sb->set_uuid+4) = random(); | |
402 | *(__u32*)(sb->set_uuid+8) = random(); | |
403 | *(__u32*)(sb->set_uuid+12) = random(); | |
404 | ||
405 | /* FIXME name */ | |
406 | ||
407 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
408 | sb->level = __cpu_to_le32(info->level); | |
ea329559 | 409 | sb->layout = __cpu_to_le32(info->layout); |
82d9eba6 NB |
410 | sb->size = __cpu_to_le64(info->size*2ULL); |
411 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
412 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
413 | ||
414 | sb->data_offset = __cpu_to_le64(0); | |
415 | sb->data_size = __cpu_to_le64(0); | |
416 | sb->super_offset = __cpu_to_le64(0); | |
417 | sb->recovery_offset = __cpu_to_le64(0); | |
418 | ||
419 | sb->utime = sb->ctime; | |
420 | sb->events = __cpu_to_le64(1); | |
34321279 | 421 | if (info->state & (1<<MD_SB_CLEAN)) |
82d9eba6 NB |
422 | sb->resync_offset = ~0ULL; |
423 | else | |
424 | sb->resync_offset = 0; | |
425 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ | |
426 | sizeof(sb->dev_roles[0])); | |
427 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
428 | ||
429 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
430 | ||
431 | *sbp = sb; | |
432 | return 1; | |
433 | } | |
434 | ||
435 | /* Add a device to the superblock being created */ | |
436 | static void add_to_super1(void *sbv, mdu_disk_info_t *dk) | |
437 | { | |
438 | struct mdp_superblock_1 *sb = sbv; | |
439 | __u16 *rp = sb->dev_roles + dk->number; | |
dfd4d8ee | 440 | if ((dk->state & 6) == 6) /* active, sync */ |
82d9eba6 | 441 | *rp = __cpu_to_le16(dk->raid_disk); |
412ca2e5 | 442 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ |
82d9eba6 NB |
443 | *rp = 0xffff; |
444 | else | |
445 | *rp = 0xfffe; | |
446 | } | |
447 | ||
96395475 | 448 | static int store_super1(struct supertype *st, int fd, void *sbv) |
82d9eba6 NB |
449 | { |
450 | struct mdp_superblock_1 *sb = sbv; | |
6fbba4c9 | 451 | unsigned long long sb_offset; |
82d9eba6 | 452 | int sbsize; |
96395475 NB |
453 | long size; |
454 | ||
455 | if (ioctl(fd, BLKGETSIZE, &size)) | |
456 | return 1; | |
457 | ||
458 | ||
459 | if (size < 24) | |
460 | return 2; | |
461 | ||
462 | /* | |
463 | * Calculate the position of the superblock. | |
464 | * It is always aligned to a 4K boundary and | |
465 | * depending on minor_version, it can be: | |
466 | * 0: At least 8K, but less than 12K, from end of device | |
467 | * 1: At start of device | |
468 | * 2: 4K from start of device. | |
469 | */ | |
470 | switch(st->minor_version) { | |
471 | case 0: | |
472 | sb_offset = size; | |
473 | sb_offset -= 8*2; | |
474 | sb_offset &= ~(4*2-1); | |
475 | break; | |
476 | case 1: | |
6fbba4c9 | 477 | sb_offset = 0; |
96395475 NB |
478 | break; |
479 | case 2: | |
480 | sb_offset = 4*2; | |
481 | break; | |
482 | default: | |
483 | return -EINVAL; | |
484 | } | |
485 | ||
82d9eba6 NB |
486 | |
487 | ||
6fbba4c9 NB |
488 | if (sb_offset != __le64_to_cpu(sb->super_offset) && |
489 | 0 != __le64_to_cpu(sb->super_offset) | |
96395475 NB |
490 | ) { |
491 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
492 | abort(); | |
493 | } | |
82d9eba6 | 494 | |
6fbba4c9 | 495 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) |
82d9eba6 NB |
496 | return 3; |
497 | ||
498 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
499 | ||
500 | if (write(fd, sb, sbsize) != sbsize) | |
501 | return 4; | |
502 | ||
570c0542 | 503 | fsync(fd); |
82d9eba6 NB |
504 | return 0; |
505 | } | |
506 | ||
892debc8 NB |
507 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname); |
508 | ||
82d9eba6 NB |
509 | static int write_init_super1(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname) |
510 | { | |
511 | struct mdp_superblock_1 *sb = sbv; | |
892debc8 NB |
512 | struct mdp_superblock_1 *refsb = NULL; |
513 | int fd = open(devname, O_RDWR | O_EXCL); | |
dfe47e00 | 514 | int rfd; |
82d9eba6 NB |
515 | int rv; |
516 | ||
517 | long size; | |
518 | long long sb_offset; | |
519 | ||
520 | ||
521 | if (fd < 0) { | |
522 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", | |
523 | devname); | |
524 | return -1; | |
525 | } | |
526 | ||
527 | sb->dev_number = __cpu_to_le32(dinfo->number); | |
dfd4d8ee NB |
528 | if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY)) |
529 | sb->devflags |= WriteMostly1; | |
892debc8 | 530 | |
dfe47e00 NB |
531 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
532 | read(rfd, sb->device_uuid, 16) != 16) { | |
533 | *(__u32*)(sb->device_uuid) = random(); | |
534 | *(__u32*)(sb->device_uuid+4) = random(); | |
535 | *(__u32*)(sb->device_uuid+8) = random(); | |
536 | *(__u32*)(sb->device_uuid+12) = random(); | |
537 | } | |
538 | if (rfd >= 0) close(rfd); | |
892debc8 NB |
539 | sb->events = 0; |
540 | ||
541 | if (load_super1(st, fd, (void**)&refsb, NULL)==0) { | |
542 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
543 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
544 | /* same array, so preserve events and dev_number */ | |
545 | sb->events = refsb->events; | |
546 | sb->dev_number = refsb->dev_number; | |
547 | } | |
548 | free(refsb); | |
549 | } | |
82d9eba6 | 550 | |
024ce7fe NB |
551 | if (ioctl(fd, BLKGETSIZE, &size)) { |
552 | close(fd); | |
82d9eba6 | 553 | return 1; |
024ce7fe | 554 | } |
82d9eba6 | 555 | |
024ce7fe NB |
556 | if (size < 24) { |
557 | close(fd); | |
82d9eba6 | 558 | return 2; |
024ce7fe | 559 | } |
82d9eba6 NB |
560 | |
561 | ||
562 | /* | |
563 | * Calculate the position of the superblock. | |
564 | * It is always aligned to a 4K boundary and | |
565 | * depending on minor_version, it can be: | |
566 | * 0: At least 8K, but less than 12K, from end of device | |
567 | * 1: At start of device | |
568 | * 2: 4K from start of device. | |
569 | */ | |
570 | switch(st->minor_version) { | |
571 | case 0: | |
572 | sb_offset = size; | |
573 | sb_offset -= 8*2; | |
574 | sb_offset &= ~(4*2-1); | |
575 | sb->super_offset = __cpu_to_le64(sb_offset); | |
576 | sb->data_offset = __cpu_to_le64(0); | |
577 | sb->data_size = sb->super_offset; | |
578 | break; | |
579 | case 1: | |
580 | sb->super_offset = __cpu_to_le64(0); | |
581 | sb->data_offset = __cpu_to_le64(2); | |
582 | sb->data_size = __cpu_to_le64(size - 2); | |
583 | break; | |
584 | case 2: | |
585 | sb_offset = 4*2; | |
586 | sb->super_offset = __cpu_to_le64(sb_offset); | |
587 | sb->data_offset = __cpu_to_le64(sb_offset+2); | |
588 | sb->data_size = __cpu_to_le64(size - 4*2 - 2); | |
589 | break; | |
590 | default: | |
591 | return -EINVAL; | |
592 | } | |
593 | ||
594 | ||
595 | sb->sb_csum = calc_sb_1_csum(sb); | |
96395475 | 596 | rv = store_super1(st, fd, sb); |
82d9eba6 NB |
597 | if (rv) |
598 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
024ce7fe | 599 | close(fd); |
82d9eba6 NB |
600 | return rv; |
601 | } | |
602 | ||
603 | static int compare_super1(void **firstp, void *secondv) | |
604 | { | |
605 | /* | |
606 | * return: | |
607 | * 0 same, or first was empty, and second was copied | |
608 | * 1 second had wrong number | |
609 | * 2 wrong uuid | |
610 | * 3 wrong other info | |
611 | */ | |
612 | struct mdp_superblock_1 *first = *firstp; | |
613 | struct mdp_superblock_1 *second = secondv; | |
614 | ||
615 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
616 | return 1; | |
617 | if (second->major_version != __cpu_to_le32(1)) | |
618 | return 1; | |
619 | ||
620 | if (!first) { | |
621 | first = malloc(1024); | |
622 | memcpy(first, second, 1024); | |
623 | *firstp = first; | |
624 | return 0; | |
625 | } | |
626 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
627 | return 2; | |
628 | ||
629 | if (first->ctime != second->ctime || | |
630 | first->level != second->level || | |
631 | first->layout != second->layout || | |
632 | first->size != second->size || | |
633 | first->chunksize != second->chunksize || | |
634 | first->raid_disks != second->raid_disks) | |
635 | return 3; | |
636 | return 0; | |
637 | } | |
638 | ||
639 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname) | |
640 | { | |
641 | unsigned long size; | |
642 | unsigned long long sb_offset; | |
643 | struct mdp_superblock_1 *super; | |
644 | ||
645 | ||
646 | ||
647 | if (st->ss == NULL) { | |
570c0542 NB |
648 | int bestvers = -1; |
649 | __u64 bestctime = 0; | |
650 | /* guess... choose latest ctime */ | |
82d9eba6 NB |
651 | st->ss = &super1; |
652 | for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) { | |
653 | switch(load_super1(st, fd, sbp, devname)) { | |
570c0542 NB |
654 | case 0: super = *sbp; |
655 | if (bestvers == -1 || | |
656 | bestctime < __le64_to_cpu(super->ctime)) { | |
657 | bestvers = st->minor_version; | |
658 | bestctime = __le64_to_cpu(super->ctime); | |
659 | } | |
660 | free(super); | |
661 | *sbp = NULL; | |
662 | break; | |
82d9eba6 NB |
663 | case 1: st->ss = NULL; return 1; /*bad device */ |
664 | case 2: break; /* bad, try next */ | |
665 | } | |
666 | } | |
570c0542 NB |
667 | if (bestvers != -1) { |
668 | int rv; | |
669 | st->minor_version = bestvers; | |
670 | st->ss = &super1; | |
ea329559 | 671 | st->max_devs = 384; |
570c0542 NB |
672 | rv = load_super1(st, fd, sbp, devname); |
673 | if (rv) st->ss = NULL; | |
674 | return rv; | |
675 | } | |
82d9eba6 NB |
676 | st->ss = NULL; |
677 | return 2; | |
678 | } | |
679 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
680 | if (devname) | |
681 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
682 | devname, strerror(errno)); | |
683 | return 1; | |
684 | } | |
685 | ||
686 | if (size < 24) { | |
687 | if (devname) | |
688 | fprintf(stderr, Name ": %s is too small for md: size is %lu sectors.\n", | |
689 | devname, size); | |
690 | return 1; | |
691 | } | |
692 | ||
693 | /* | |
694 | * Calculate the position of the superblock. | |
695 | * It is always aligned to a 4K boundary and | |
696 | * depeding on minor_version, it can be: | |
697 | * 0: At least 8K, but less than 12K, from end of device | |
698 | * 1: At start of device | |
699 | * 2: 4K from start of device. | |
700 | */ | |
701 | switch(st->minor_version) { | |
702 | case 0: | |
703 | sb_offset = size; | |
704 | sb_offset -= 8*2; | |
705 | sb_offset &= ~(4*2-1); | |
706 | break; | |
707 | case 1: | |
708 | sb_offset = 0; | |
709 | break; | |
710 | case 2: | |
711 | sb_offset = 4*2; | |
712 | break; | |
713 | default: | |
714 | return -EINVAL; | |
715 | } | |
716 | ||
717 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
718 | ||
719 | ||
720 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
721 | if (devname) | |
722 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
723 | devname, strerror(errno)); | |
724 | return 1; | |
725 | } | |
726 | ||
727 | super = malloc(1024); | |
728 | ||
729 | if (read(fd, super, 1024) != 1024) { | |
730 | if (devname) | |
731 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
732 | devname); | |
733 | free(super); | |
734 | return 1; | |
735 | } | |
736 | ||
737 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
738 | if (devname) | |
739 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
740 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
741 | free(super); | |
742 | return 2; | |
743 | } | |
744 | ||
745 | if (__le32_to_cpu(super->major_version) != 1) { | |
746 | if (devname) | |
747 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
748 | devname, __le32_to_cpu(super->major_version)); | |
749 | free(super); | |
750 | return 2; | |
751 | } | |
752 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
753 | if (devname) | |
754 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
755 | devname); | |
756 | free(super); | |
757 | return 2; | |
758 | } | |
759 | *sbp = super; | |
760 | return 0; | |
761 | } | |
762 | ||
763 | ||
764 | static struct supertype *match_metadata_desc1(char *arg) | |
765 | { | |
766 | struct supertype *st = malloc(sizeof(*st)); | |
767 | if (!st) return st; | |
768 | ||
769 | st->ss = &super1; | |
ea329559 | 770 | st->max_devs = 384; |
82d9eba6 NB |
771 | if (strcmp(arg, "1") == 0 || |
772 | strcmp(arg, "1.0") == 0) { | |
773 | st->minor_version = 0; | |
774 | return st; | |
775 | } | |
776 | if (strcmp(arg, "1.1") == 0) { | |
777 | st->minor_version = 1; | |
778 | return st; | |
779 | } | |
780 | if (strcmp(arg, "1.2") == 0) { | |
781 | st->minor_version = 2; | |
782 | return st; | |
783 | } | |
784 | ||
785 | free(st); | |
786 | return NULL; | |
787 | } | |
788 | ||
789 | static __u64 avail_size1(__u64 devsize) | |
790 | { | |
791 | if (devsize < 24) | |
792 | return 0; | |
793 | ||
794 | return (devsize - 8*2 ) & ~(4*2-1); | |
795 | } | |
796 | ||
797 | struct superswitch super1 = { | |
c7654afc | 798 | #ifndef MDASSEMBLE |
82d9eba6 NB |
799 | .examine_super = examine_super1, |
800 | .brief_examine_super = brief_examine_super1, | |
801 | .detail_super = detail_super1, | |
802 | .brief_detail_super = brief_detail_super1, | |
c7654afc | 803 | #endif |
82d9eba6 NB |
804 | .uuid_from_super = uuid_from_super1, |
805 | .getinfo_super = getinfo_super1, | |
806 | .update_super = update_super1, | |
807 | .event_super = event_super1, | |
808 | .init_super = init_super1, | |
809 | .add_to_super = add_to_super1, | |
810 | .store_super = store_super1, | |
811 | .write_init_super = write_init_super1, | |
812 | .compare_super = compare_super1, | |
813 | .load_super = load_super1, | |
814 | .match_metadata_desc = match_metadata_desc1, | |
815 | .avail_size = avail_size1, | |
816 | .major = 1, | |
f277ce36 NB |
817 | #if __BYTE_ORDER == BIG_ENDIAN |
818 | .swapuuid = 0, | |
819 | #else | |
820 | .swapuuid = 1, | |
821 | #endif | |
82d9eba6 | 822 | }; |