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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; | |
34163fc7 NB |
57 | __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts |
58 | * NOTE: signed, so bitmap can be before superblock | |
59 | * only meaningful of feature_map[0] is set. | |
60 | */ | |
61 | __u8 pad1[128-100]; /* set to 0 when written */ | |
82d9eba6 NB |
62 | |
63 | /* constant this-device information - 64 bytes */ | |
64 | __u64 data_offset; /* sector start of data, often 0 */ | |
65 | __u64 data_size; /* sectors in this device that can be used for data */ | |
66 | __u64 super_offset; /* sector start of this superblock */ | |
67 | __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */ | |
68 | __u32 dev_number; /* permanent identifier of this device - not role in raid */ | |
69 | __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */ | |
70 | __u8 device_uuid[16]; /* user-space setable, ignored by kernel */ | |
dfd4d8ee NB |
71 | __u8 devflags; /* per-device flags. Only one defined...*/ |
72 | #define WriteMostly1 1 /* mask for writemostly flag in above */ | |
73 | __u8 pad2[64-57]; /* set to 0 when writing */ | |
82d9eba6 NB |
74 | |
75 | /* array state information - 64 bytes */ | |
76 | __u64 utime; /* 40 bits second, 24 btes microseconds */ | |
77 | __u64 events; /* incremented when superblock updated */ | |
78 | __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */ | |
79 | __u32 sb_csum; /* checksum upto devs[max_dev] */ | |
80 | __u32 max_dev; /* size of devs[] array to consider */ | |
81 | __u8 pad3[64-32]; /* set to 0 when writing */ | |
82 | ||
83 | /* device state information. Indexed by dev_number. | |
84 | * 2 bytes per device | |
85 | * Note there are no per-device state flags. State information is rolled | |
86 | * into the 'roles' value. If a device is spare or faulty, then it doesn't | |
87 | * have a meaningful role. | |
88 | */ | |
89 | __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ | |
90 | }; | |
91 | ||
570c0542 | 92 | #ifndef offsetof |
82d9eba6 | 93 | #define offsetof(t,f) ((int)&(((t*)0)->f)) |
570c0542 | 94 | #endif |
82d9eba6 NB |
95 | static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb) |
96 | { | |
97 | unsigned int disk_csum, csum; | |
98 | unsigned long long newcsum; | |
99 | int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2; | |
100 | unsigned int *isuper = (unsigned int*)sb; | |
101 | int i; | |
102 | ||
103 | /* make sure I can count... */ | |
104 | if (offsetof(struct mdp_superblock_1,data_offset) != 128 || | |
105 | offsetof(struct mdp_superblock_1, utime) != 192 || | |
106 | sizeof(struct mdp_superblock_1) != 256) { | |
107 | fprintf(stderr, "WARNING - superblock isn't sized correctly\n"); | |
108 | } | |
109 | ||
110 | disk_csum = sb->sb_csum; | |
111 | sb->sb_csum = 0; | |
112 | newcsum = 0; | |
113 | for (i=0; size>=4; size -= 4 ) | |
114 | newcsum += __le32_to_cpu(*isuper++); | |
115 | ||
116 | if (size == 2) | |
117 | newcsum += __le16_to_cpu(*(unsigned short*) isuper); | |
118 | ||
119 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
120 | sb->sb_csum = disk_csum; | |
121 | return csum; | |
122 | } | |
123 | ||
c7654afc | 124 | #ifndef MDASSEMBLE |
82d9eba6 NB |
125 | static void examine_super1(void *sbv) |
126 | { | |
127 | struct mdp_superblock_1 *sb = sbv; | |
128 | time_t atime; | |
129 | int d; | |
6fbba4c9 | 130 | int faulty; |
82d9eba6 NB |
131 | int i; |
132 | char *c; | |
133 | ||
134 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
135 | printf(" Version : %02d.%02d\n", 1, __le32_to_cpu(sb->feature_map)); | |
136 | printf(" Array UUID : "); | |
137 | for (i=0; i<16; i++) { | |
82d9eba6 | 138 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 139 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 NB |
140 | } |
141 | printf("\n"); | |
142 | printf(" Name : %.32s\n", sb->set_name); | |
143 | ||
144 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
145 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
146 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
147 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
148 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
149 | printf("\n"); | |
570c0542 | 150 | printf(" Device Size : %llu%s\n", (unsigned long long)sb->data_size, human_size(sb->data_size<<9)); |
82d9eba6 | 151 | if (sb->data_offset) |
570c0542 | 152 | printf(" Data Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->data_offset)); |
82d9eba6 | 153 | if (sb->super_offset) |
570c0542 | 154 | printf(" Super Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->super_offset)); |
a3fd117c | 155 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); |
82d9eba6 NB |
156 | printf(" Device UUID : "); |
157 | for (i=0; i<16; i++) { | |
82d9eba6 | 158 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 159 | printf("%02x", sb->device_uuid[i]); |
82d9eba6 NB |
160 | } |
161 | printf("\n"); | |
dfd4d8ee NB |
162 | if (sb->devflags) { |
163 | printf(" Flags :"); | |
34163fc7 | 164 | if (sb->devflags & WriteMostly1) |
dfd4d8ee NB |
165 | printf(" write-mostly"); |
166 | printf("\n"); | |
167 | } | |
82d9eba6 NB |
168 | |
169 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
170 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
171 | ||
172 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
173 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
174 | else | |
175 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
176 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
570c0542 | 177 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
178 | printf("\n"); |
179 | if (__le32_to_cpu(sb->level) == 5) { | |
180 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
181 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
182 | } | |
183 | switch(__le32_to_cpu(sb->level)) { | |
184 | case 0: | |
185 | case 4: | |
186 | case 5: | |
187 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize/2)); | |
188 | break; | |
189 | case -1: | |
190 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize/2)); | |
191 | break; | |
192 | default: break; | |
193 | } | |
194 | printf("\n"); | |
195 | printf(" Array State : "); | |
196 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
197 | int cnt = 0; | |
198 | int me = 0; | |
199 | int i; | |
200 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
201 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
202 | if (role == d) { | |
203 | if (i == __le32_to_cpu(sb->dev_number)) | |
204 | me = 1; | |
205 | cnt++; | |
206 | } | |
207 | } | |
208 | if (cnt > 1) printf("?"); | |
209 | else if (cnt == 1 && me) printf("U"); | |
210 | else if (cnt == 1) printf("u"); | |
211 | else printf ("_"); | |
212 | } | |
6fbba4c9 | 213 | faulty = 0; |
82d9eba6 NB |
214 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
215 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
6fbba4c9 NB |
216 | if (role == 0xFFFE) |
217 | faulty++; | |
82d9eba6 | 218 | } |
82d9eba6 NB |
219 | if (faulty) printf(" %d failed", faulty); |
220 | printf("\n"); | |
221 | } | |
222 | ||
223 | ||
224 | static void brief_examine_super1(void *sbv) | |
225 | { | |
226 | struct mdp_superblock_1 *sb = sbv; | |
227 | int i; | |
228 | ||
229 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
230 | ||
231 | printf("ARRAY /dev/?? level=%s metadata=1 num-devices=%d UUID=", | |
232 | c?c:"-unknown-", sb->raid_disks); | |
233 | for (i=0; i<16; i++) { | |
234 | printf("%02x", sb->set_uuid[i]); | |
235 | if ((i&3)==0 && i != 0) printf(":"); | |
236 | } | |
947fd4dd NB |
237 | if (sb->set_name[0]) |
238 | printf(" name=%.32s", sb->set_name); | |
82d9eba6 NB |
239 | printf("\n"); |
240 | } | |
241 | ||
242 | static void detail_super1(void *sbv) | |
243 | { | |
244 | struct mdp_superblock_1 *sb = sbv; | |
245 | int i; | |
246 | ||
947fd4dd | 247 | printf(" Name : %.32s\n", sb->set_name); |
82d9eba6 NB |
248 | printf(" UUID : "); |
249 | for (i=0; i<16; i++) { | |
82d9eba6 | 250 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 251 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 | 252 | } |
570c0542 | 253 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
254 | } |
255 | ||
256 | static void brief_detail_super1(void *sbv) | |
257 | { | |
258 | struct mdp_superblock_1 *sb = sbv; | |
259 | int i; | |
260 | ||
947fd4dd NB |
261 | if (sb->set_name[0]) |
262 | printf(" name=%.32s", sb->set_name); | |
82d9eba6 NB |
263 | printf(" UUID="); |
264 | for (i=0; i<16; i++) { | |
82d9eba6 | 265 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 266 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 NB |
267 | } |
268 | } | |
269 | ||
c7654afc NB |
270 | #endif |
271 | ||
82d9eba6 NB |
272 | static void uuid_from_super1(int uuid[4], void * sbv) |
273 | { | |
274 | struct mdp_superblock_1 *super = sbv; | |
275 | char *cuuid = (char*)uuid; | |
276 | int i; | |
277 | for (i=0; i<16; i++) | |
278 | cuuid[i] = super->set_uuid[i]; | |
279 | } | |
280 | ||
947fd4dd | 281 | static void getinfo_super1(struct mdinfo *info, mddev_ident_t ident, void *sbv) |
82d9eba6 NB |
282 | { |
283 | struct mdp_superblock_1 *sb = sbv; | |
284 | int working = 0; | |
285 | int i; | |
286 | int role; | |
287 | ||
288 | info->array.major_version = 1; | |
289 | info->array.minor_version = __le32_to_cpu(sb->feature_map); | |
290 | info->array.patch_version = 0; | |
291 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
292 | info->array.level = __le32_to_cpu(sb->level); | |
293 | info->array.md_minor = -1; | |
294 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
295 | ||
296 | info->disk.major = 0; | |
297 | info->disk.minor = 0; | |
fbf8a0b7 | 298 | info->disk.number = __le32_to_cpu(sb->dev_number); |
82d9eba6 NB |
299 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || |
300 | __le32_to_cpu(sb->max_dev) > 512) | |
301 | role = 0xfffe; | |
302 | else | |
303 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
304 | ||
305 | info->disk.raid_disk = -1; | |
306 | switch(role) { | |
307 | case 0xFFFF: | |
308 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
309 | break; | |
310 | case 0xFFFE: | |
311 | info->disk.state = 1; /* faulty */ | |
312 | break; | |
313 | default: | |
314 | info->disk.state = 6; /* active and in sync */ | |
315 | info->disk.raid_disk = role; | |
316 | } | |
317 | info->events = __le64_to_cpu(sb->events); | |
318 | ||
319 | memcpy(info->uuid, sb->set_uuid, 16); | |
320 | ||
947fd4dd NB |
321 | strncpy(ident->name, sb->set_name, 32); |
322 | ident->name[32] = 0; | |
323 | ||
82d9eba6 NB |
324 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
325 | role = __le16_to_cpu(sb->dev_roles[i]); | |
fbf8a0b7 | 326 | if (/*role == 0xFFFF || */role < info->array.raid_disks) |
82d9eba6 NB |
327 | working++; |
328 | } | |
329 | ||
330 | info->array.working_disks = working; | |
331 | } | |
332 | ||
333 | static int update_super1(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose) | |
334 | { | |
335 | int rv = 0; | |
336 | struct mdp_superblock_1 *sb = sbv; | |
337 | ||
338 | if (strcmp(update, "force")==0) { | |
339 | sb->events = __cpu_to_le32(info->events); | |
340 | switch(__le32_to_cpu(sb->level)) { | |
341 | case 5: case 4: case 6: | |
342 | /* need to force clean */ | |
343 | sb->resync_offset = ~0ULL; | |
344 | } | |
345 | } | |
346 | if (strcmp(update, "assemble")==0) { | |
347 | int d = info->disk.number; | |
348 | int want; | |
349 | if (info->disk.state == 6) | |
350 | want = __cpu_to_le32(info->disk.raid_disk); | |
351 | else | |
352 | want = 0xFFFF; | |
353 | if (sb->dev_roles[d] != want) { | |
354 | sb->dev_roles[d] = want; | |
355 | rv = 1; | |
356 | } | |
357 | } | |
358 | #if 0 | |
359 | if (strcmp(update, "newdev") == 0) { | |
360 | int d = info->disk.number; | |
361 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
362 | sb->disks[d].number = d; | |
363 | sb->disks[d].major = info->disk.major; | |
364 | sb->disks[d].minor = info->disk.minor; | |
365 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
366 | sb->disks[d].state = info->disk.state; | |
367 | sb->this_disk = sb->disks[d]; | |
368 | } | |
369 | #endif | |
370 | if (strcmp(update, "grow") == 0) { | |
371 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
372 | /* FIXME */ | |
373 | } | |
374 | if (strcmp(update, "resync") == 0) { | |
375 | /* make sure resync happens */ | |
376 | sb->resync_offset = ~0ULL; | |
377 | } | |
378 | ||
379 | sb->sb_csum = calc_sb_1_csum(sb); | |
380 | return rv; | |
381 | } | |
382 | ||
383 | ||
384 | static __u64 event_super1(void *sbv) | |
385 | { | |
386 | struct mdp_superblock_1 *sb = sbv; | |
387 | return __le64_to_cpu(sb->events); | |
388 | } | |
389 | ||
947fd4dd | 390 | static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info, char *name) |
82d9eba6 | 391 | { |
34163fc7 | 392 | struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t)); |
82d9eba6 | 393 | int spares; |
34163fc7 | 394 | int rfd; |
82d9eba6 NB |
395 | memset(sb, 0, 1024); |
396 | ||
397 | if (info->major_version == -1) | |
398 | /* zeroing superblock */ | |
399 | return 0; | |
400 | ||
401 | spares = info->working_disks - info->active_disks; | |
402 | if (info->raid_disks + spares > 384) { | |
403 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
404 | info->raid_disks , spares, 384); | |
405 | return 0; | |
406 | } | |
407 | ||
408 | ||
409 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
410 | sb->major_version = __cpu_to_le32(1); | |
411 | sb->feature_map = 0; | |
412 | sb->pad0 = 0; | |
34163fc7 NB |
413 | |
414 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
415 | read(rfd, sb->set_uuid, 16) != 16) { | |
416 | *(__u32*)(sb->set_uuid) = random(); | |
417 | *(__u32*)(sb->set_uuid+4) = random(); | |
418 | *(__u32*)(sb->set_uuid+8) = random(); | |
419 | *(__u32*)(sb->set_uuid+12) = random(); | |
420 | } | |
421 | if (rfd >= 0) close(rfd); | |
82d9eba6 | 422 | |
947fd4dd NB |
423 | memset(sb->set_name, 0, 32); |
424 | strcpy(sb->set_name, name); | |
82d9eba6 NB |
425 | |
426 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
427 | sb->level = __cpu_to_le32(info->level); | |
ea329559 | 428 | sb->layout = __cpu_to_le32(info->layout); |
82d9eba6 NB |
429 | sb->size = __cpu_to_le64(info->size*2ULL); |
430 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
431 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
432 | ||
433 | sb->data_offset = __cpu_to_le64(0); | |
434 | sb->data_size = __cpu_to_le64(0); | |
435 | sb->super_offset = __cpu_to_le64(0); | |
436 | sb->recovery_offset = __cpu_to_le64(0); | |
437 | ||
438 | sb->utime = sb->ctime; | |
439 | sb->events = __cpu_to_le64(1); | |
34321279 | 440 | if (info->state & (1<<MD_SB_CLEAN)) |
82d9eba6 NB |
441 | sb->resync_offset = ~0ULL; |
442 | else | |
443 | sb->resync_offset = 0; | |
34163fc7 | 444 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ |
82d9eba6 NB |
445 | sizeof(sb->dev_roles[0])); |
446 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
447 | ||
448 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
449 | ||
450 | *sbp = sb; | |
451 | return 1; | |
452 | } | |
453 | ||
454 | /* Add a device to the superblock being created */ | |
455 | static void add_to_super1(void *sbv, mdu_disk_info_t *dk) | |
456 | { | |
457 | struct mdp_superblock_1 *sb = sbv; | |
458 | __u16 *rp = sb->dev_roles + dk->number; | |
dfd4d8ee | 459 | if ((dk->state & 6) == 6) /* active, sync */ |
82d9eba6 | 460 | *rp = __cpu_to_le16(dk->raid_disk); |
412ca2e5 | 461 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ |
82d9eba6 | 462 | *rp = 0xffff; |
34163fc7 | 463 | else |
82d9eba6 NB |
464 | *rp = 0xfffe; |
465 | } | |
466 | ||
96395475 | 467 | static int store_super1(struct supertype *st, int fd, void *sbv) |
82d9eba6 NB |
468 | { |
469 | struct mdp_superblock_1 *sb = sbv; | |
6fbba4c9 | 470 | unsigned long long sb_offset; |
82d9eba6 | 471 | int sbsize; |
96395475 NB |
472 | long size; |
473 | ||
474 | if (ioctl(fd, BLKGETSIZE, &size)) | |
475 | return 1; | |
476 | ||
477 | ||
478 | if (size < 24) | |
479 | return 2; | |
480 | ||
481 | /* | |
482 | * Calculate the position of the superblock. | |
483 | * It is always aligned to a 4K boundary and | |
484 | * depending on minor_version, it can be: | |
485 | * 0: At least 8K, but less than 12K, from end of device | |
486 | * 1: At start of device | |
487 | * 2: 4K from start of device. | |
488 | */ | |
489 | switch(st->minor_version) { | |
490 | case 0: | |
491 | sb_offset = size; | |
492 | sb_offset -= 8*2; | |
493 | sb_offset &= ~(4*2-1); | |
494 | break; | |
495 | case 1: | |
6fbba4c9 | 496 | sb_offset = 0; |
96395475 NB |
497 | break; |
498 | case 2: | |
499 | sb_offset = 4*2; | |
500 | break; | |
501 | default: | |
502 | return -EINVAL; | |
503 | } | |
504 | ||
82d9eba6 | 505 | |
34163fc7 | 506 | |
6fbba4c9 NB |
507 | if (sb_offset != __le64_to_cpu(sb->super_offset) && |
508 | 0 != __le64_to_cpu(sb->super_offset) | |
96395475 NB |
509 | ) { |
510 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
511 | abort(); | |
512 | } | |
82d9eba6 | 513 | |
6fbba4c9 | 514 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) |
82d9eba6 NB |
515 | return 3; |
516 | ||
517 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
518 | ||
519 | if (write(fd, sb, sbsize) != sbsize) | |
520 | return 4; | |
521 | ||
570c0542 | 522 | fsync(fd); |
82d9eba6 NB |
523 | return 0; |
524 | } | |
525 | ||
892debc8 NB |
526 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname); |
527 | ||
34163fc7 NB |
528 | static int write_init_super1(struct supertype *st, void *sbv, |
529 | mdu_disk_info_t *dinfo, char *devname, | |
530 | int reserve) | |
82d9eba6 NB |
531 | { |
532 | struct mdp_superblock_1 *sb = sbv; | |
892debc8 NB |
533 | struct mdp_superblock_1 *refsb = NULL; |
534 | int fd = open(devname, O_RDWR | O_EXCL); | |
dfe47e00 | 535 | int rfd; |
82d9eba6 NB |
536 | int rv; |
537 | ||
538 | long size; | |
539 | long long sb_offset; | |
540 | ||
541 | ||
542 | if (fd < 0) { | |
543 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", | |
544 | devname); | |
545 | return -1; | |
546 | } | |
547 | ||
548 | sb->dev_number = __cpu_to_le32(dinfo->number); | |
34163fc7 | 549 | if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY)) |
dfd4d8ee | 550 | sb->devflags |= WriteMostly1; |
892debc8 | 551 | |
dfe47e00 NB |
552 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
553 | read(rfd, sb->device_uuid, 16) != 16) { | |
554 | *(__u32*)(sb->device_uuid) = random(); | |
555 | *(__u32*)(sb->device_uuid+4) = random(); | |
556 | *(__u32*)(sb->device_uuid+8) = random(); | |
557 | *(__u32*)(sb->device_uuid+12) = random(); | |
558 | } | |
559 | if (rfd >= 0) close(rfd); | |
892debc8 NB |
560 | sb->events = 0; |
561 | ||
562 | if (load_super1(st, fd, (void**)&refsb, NULL)==0) { | |
563 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
564 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
565 | /* same array, so preserve events and dev_number */ | |
566 | sb->events = refsb->events; | |
567 | sb->dev_number = refsb->dev_number; | |
568 | } | |
569 | free(refsb); | |
570 | } | |
34163fc7 | 571 | |
024ce7fe NB |
572 | if (ioctl(fd, BLKGETSIZE, &size)) { |
573 | close(fd); | |
82d9eba6 | 574 | return 1; |
024ce7fe | 575 | } |
82d9eba6 | 576 | |
024ce7fe NB |
577 | if (size < 24) { |
578 | close(fd); | |
82d9eba6 | 579 | return 2; |
024ce7fe | 580 | } |
82d9eba6 NB |
581 | |
582 | ||
583 | /* | |
584 | * Calculate the position of the superblock. | |
585 | * It is always aligned to a 4K boundary and | |
586 | * depending on minor_version, it can be: | |
587 | * 0: At least 8K, but less than 12K, from end of device | |
588 | * 1: At start of device | |
589 | * 2: 4K from start of device. | |
590 | */ | |
591 | switch(st->minor_version) { | |
592 | case 0: | |
593 | sb_offset = size; | |
594 | sb_offset -= 8*2; | |
595 | sb_offset &= ~(4*2-1); | |
596 | sb->super_offset = __cpu_to_le64(sb_offset); | |
597 | sb->data_offset = __cpu_to_le64(0); | |
34163fc7 | 598 | sb->data_size = __cpu_to_le64(sb_offset - reserve); |
82d9eba6 NB |
599 | break; |
600 | case 1: | |
601 | sb->super_offset = __cpu_to_le64(0); | |
34163fc7 NB |
602 | sb->data_offset = __cpu_to_le64(2 + reserve); |
603 | sb->data_size = __cpu_to_le64(size - 2 - reserve); | |
82d9eba6 NB |
604 | break; |
605 | case 2: | |
606 | sb_offset = 4*2; | |
607 | sb->super_offset = __cpu_to_le64(sb_offset); | |
34163fc7 NB |
608 | sb->data_offset = __cpu_to_le64(sb_offset+2 + reserve); |
609 | sb->data_size = __cpu_to_le64(size - 4*2 - 2 - reserve); | |
82d9eba6 NB |
610 | break; |
611 | default: | |
612 | return -EINVAL; | |
613 | } | |
614 | ||
615 | ||
616 | sb->sb_csum = calc_sb_1_csum(sb); | |
96395475 | 617 | rv = store_super1(st, fd, sb); |
82d9eba6 NB |
618 | if (rv) |
619 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
34163fc7 NB |
620 | |
621 | if (__le32_to_cpu(sb->feature_map) & 1) { | |
622 | /* write the bitmap */ | |
623 | int towrite, n; | |
624 | char buf[4096]; | |
625 | ||
626 | st->ss->locate_bitmap(st, fd); | |
627 | write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)); | |
628 | towrite = 62*1024; | |
629 | memset(buf, 0xff, sizeof(buf)); | |
630 | while (towrite > 0) { | |
631 | n=towrite; | |
632 | if (n > sizeof(buf)) | |
633 | n = sizeof(buf); | |
634 | n = write(fd, buf, n); | |
635 | if (n > 0) | |
636 | towrite -= n; | |
637 | else | |
638 | break; | |
639 | } | |
640 | if (towrite) | |
641 | rv = -2; | |
642 | } | |
643 | fsync(fd); | |
024ce7fe | 644 | close(fd); |
82d9eba6 NB |
645 | return rv; |
646 | } | |
647 | ||
648 | static int compare_super1(void **firstp, void *secondv) | |
649 | { | |
650 | /* | |
651 | * return: | |
652 | * 0 same, or first was empty, and second was copied | |
653 | * 1 second had wrong number | |
654 | * 2 wrong uuid | |
655 | * 3 wrong other info | |
656 | */ | |
657 | struct mdp_superblock_1 *first = *firstp; | |
658 | struct mdp_superblock_1 *second = secondv; | |
659 | ||
660 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
661 | return 1; | |
662 | if (second->major_version != __cpu_to_le32(1)) | |
663 | return 1; | |
664 | ||
665 | if (!first) { | |
666 | first = malloc(1024); | |
667 | memcpy(first, second, 1024); | |
668 | *firstp = first; | |
669 | return 0; | |
670 | } | |
671 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
672 | return 2; | |
673 | ||
674 | if (first->ctime != second->ctime || | |
675 | first->level != second->level || | |
676 | first->layout != second->layout || | |
677 | first->size != second->size || | |
678 | first->chunksize != second->chunksize || | |
679 | first->raid_disks != second->raid_disks) | |
680 | return 3; | |
681 | return 0; | |
682 | } | |
683 | ||
684 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname) | |
685 | { | |
686 | unsigned long size; | |
687 | unsigned long long sb_offset; | |
688 | struct mdp_superblock_1 *super; | |
689 | ||
690 | ||
691 | ||
692 | if (st->ss == NULL) { | |
570c0542 NB |
693 | int bestvers = -1; |
694 | __u64 bestctime = 0; | |
695 | /* guess... choose latest ctime */ | |
82d9eba6 NB |
696 | st->ss = &super1; |
697 | for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) { | |
698 | switch(load_super1(st, fd, sbp, devname)) { | |
570c0542 NB |
699 | case 0: super = *sbp; |
700 | if (bestvers == -1 || | |
701 | bestctime < __le64_to_cpu(super->ctime)) { | |
702 | bestvers = st->minor_version; | |
703 | bestctime = __le64_to_cpu(super->ctime); | |
704 | } | |
705 | free(super); | |
706 | *sbp = NULL; | |
707 | break; | |
82d9eba6 NB |
708 | case 1: st->ss = NULL; return 1; /*bad device */ |
709 | case 2: break; /* bad, try next */ | |
710 | } | |
711 | } | |
570c0542 NB |
712 | if (bestvers != -1) { |
713 | int rv; | |
714 | st->minor_version = bestvers; | |
715 | st->ss = &super1; | |
ea329559 | 716 | st->max_devs = 384; |
570c0542 NB |
717 | rv = load_super1(st, fd, sbp, devname); |
718 | if (rv) st->ss = NULL; | |
719 | return rv; | |
720 | } | |
82d9eba6 NB |
721 | st->ss = NULL; |
722 | return 2; | |
723 | } | |
724 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
34163fc7 | 725 | if (devname) |
82d9eba6 NB |
726 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", |
727 | devname, strerror(errno)); | |
728 | return 1; | |
729 | } | |
730 | ||
731 | if (size < 24) { | |
732 | if (devname) | |
733 | fprintf(stderr, Name ": %s is too small for md: size is %lu sectors.\n", | |
734 | devname, size); | |
735 | return 1; | |
736 | } | |
737 | ||
738 | /* | |
739 | * Calculate the position of the superblock. | |
740 | * It is always aligned to a 4K boundary and | |
741 | * depeding on minor_version, it can be: | |
742 | * 0: At least 8K, but less than 12K, from end of device | |
743 | * 1: At start of device | |
744 | * 2: 4K from start of device. | |
745 | */ | |
746 | switch(st->minor_version) { | |
747 | case 0: | |
748 | sb_offset = size; | |
749 | sb_offset -= 8*2; | |
750 | sb_offset &= ~(4*2-1); | |
751 | break; | |
752 | case 1: | |
753 | sb_offset = 0; | |
754 | break; | |
755 | case 2: | |
756 | sb_offset = 4*2; | |
757 | break; | |
758 | default: | |
759 | return -EINVAL; | |
760 | } | |
761 | ||
762 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
763 | ||
764 | ||
765 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
766 | if (devname) | |
767 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
768 | devname, strerror(errno)); | |
769 | return 1; | |
770 | } | |
771 | ||
34163fc7 | 772 | super = malloc(1024 + sizeof(bitmap_super_t)); |
82d9eba6 NB |
773 | |
774 | if (read(fd, super, 1024) != 1024) { | |
775 | if (devname) | |
776 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
777 | devname); | |
778 | free(super); | |
779 | return 1; | |
780 | } | |
781 | ||
782 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
783 | if (devname) | |
784 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
785 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
786 | free(super); | |
787 | return 2; | |
788 | } | |
789 | ||
790 | if (__le32_to_cpu(super->major_version) != 1) { | |
791 | if (devname) | |
792 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
793 | devname, __le32_to_cpu(super->major_version)); | |
794 | free(super); | |
795 | return 2; | |
796 | } | |
797 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
798 | if (devname) | |
799 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
800 | devname); | |
801 | free(super); | |
802 | return 2; | |
803 | } | |
804 | *sbp = super; | |
805 | return 0; | |
806 | } | |
807 | ||
808 | ||
809 | static struct supertype *match_metadata_desc1(char *arg) | |
810 | { | |
811 | struct supertype *st = malloc(sizeof(*st)); | |
812 | if (!st) return st; | |
813 | ||
814 | st->ss = &super1; | |
ea329559 | 815 | st->max_devs = 384; |
82d9eba6 NB |
816 | if (strcmp(arg, "1") == 0 || |
817 | strcmp(arg, "1.0") == 0) { | |
818 | st->minor_version = 0; | |
819 | return st; | |
820 | } | |
821 | if (strcmp(arg, "1.1") == 0) { | |
822 | st->minor_version = 1; | |
823 | return st; | |
824 | } | |
825 | if (strcmp(arg, "1.2") == 0) { | |
826 | st->minor_version = 2; | |
827 | return st; | |
828 | } | |
829 | ||
830 | free(st); | |
831 | return NULL; | |
832 | } | |
833 | ||
34163fc7 NB |
834 | /* find available size on device with this devsize, using |
835 | * superblock type st, and reserving 'reserve' sectors for | |
836 | * a possible bitmap | |
837 | */ | |
838 | static __u64 avail_size1(struct supertype *st, __u64 devsize, int reserve) | |
82d9eba6 NB |
839 | { |
840 | if (devsize < 24) | |
841 | return 0; | |
842 | ||
34163fc7 NB |
843 | switch(st->minor_version) { |
844 | case 0: | |
845 | /* at end, with reserve before it */ | |
846 | return ((devsize - 8*2 ) & ~(4*2-1)) - reserve; | |
847 | case 1: | |
848 | /* at start, 1K for superblock */ | |
849 | return devsize - 2 - reserve; | |
850 | case 2: | |
851 | /* 4k from start, 1K for superblock */ | |
852 | return devsize - (4+1)*2 - reserve; | |
853 | } | |
854 | return 0; | |
855 | } | |
856 | ||
857 | static int add_internal_bitmap1(struct supertype *st, void *sbv, int chunk, int delay, int write_behind, unsigned long long size) | |
858 | { | |
859 | /* | |
860 | * The bitmap comes immediately before of after the superblock and must be 62K in size | |
861 | * at most. The default size is between 31K and 62K | |
862 | * | |
863 | * size is in K, chunk is in bytes !!! | |
864 | */ | |
865 | ||
866 | unsigned long long bits = size; | |
867 | unsigned long long max_bits = 62*1024*8; | |
868 | unsigned long long min_chunk; | |
869 | struct mdp_superblock_1 *sb = sbv; | |
870 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
871 | ||
872 | ||
873 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
874 | while (bits > max_bits) { | |
875 | min_chunk *= 2; | |
876 | bits = (bits+1)/2; | |
877 | } | |
878 | if (chunk == UnSet) | |
879 | chunk = min_chunk; | |
880 | else if (chunk < min_chunk) | |
881 | return 0; /* chunk size too small */ | |
882 | ||
883 | if (st->minor_version == 0) | |
884 | sb->bitmap_offset = __cpu_to_le32(-64*2); | |
885 | else | |
886 | sb->bitmap_offset = __cpu_to_le32(2); | |
887 | ||
888 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
889 | memset(bms, sizeof(*bms), 0); | |
890 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); | |
891 | bms->version = __cpu_to_le32(BITMAP_MAJOR); | |
892 | uuid_from_super1((int*)bms->uuid, sb); | |
893 | bms->chunksize = __cpu_to_le32(chunk); | |
894 | bms->daemon_sleep = __cpu_to_le32(delay); | |
895 | bms->sync_size = __cpu_to_le64(size); | |
896 | bms->write_behind = __cpu_to_le32(write_behind); | |
897 | ||
898 | ||
899 | ||
900 | return 1; | |
901 | } | |
902 | ||
903 | ||
904 | void locate_bitmap1(struct supertype *st, int fd) | |
905 | { | |
906 | unsigned long long dsize; | |
907 | unsigned long size; | |
908 | unsigned long long offset; | |
909 | ||
910 | switch(st->minor_version){ | |
911 | case 0: | |
912 | #ifdef BLKGETSIZE64 | |
913 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
914 | #endif | |
915 | { | |
916 | if (ioctl(fd, BLKGETSIZE, &size)) | |
917 | return; | |
918 | else | |
919 | dsize = ((unsigned long long)size)<<9; | |
920 | } | |
921 | ||
922 | offset = (dsize - 8192) & ~4095ULL; | |
923 | ||
924 | offset -= 65536; | |
925 | break; | |
926 | ||
927 | case 1: | |
928 | offset = 1024; | |
929 | break; | |
930 | case 2: | |
931 | offset = 4096+1024; | |
932 | } | |
933 | lseek64(fd, offset, 0); | |
934 | } | |
935 | ||
936 | int write_bitmap1(struct supertype *st, int fd, void *sbv) | |
937 | { | |
938 | struct mdp_superblock_1 *sb = sbv; | |
939 | ||
940 | int rv = 0; | |
941 | ||
942 | int towrite, n; | |
943 | char buf[4096]; | |
944 | ||
945 | locate_bitmap1(st, fd); | |
946 | ||
947 | write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)); | |
948 | towrite = 62*1024 - sizeof(bitmap_super_t); | |
949 | memset(buf, 0xff, sizeof(buf)); | |
950 | while (towrite > 0) { | |
951 | n = towrite; | |
952 | if (n > sizeof(buf)) | |
953 | n = sizeof(buf); | |
954 | n = write(fd, buf, n); | |
955 | if (n > 0) | |
956 | towrite -= n; | |
957 | else | |
958 | break; | |
959 | } | |
960 | fsync(fd); | |
961 | if (towrite) | |
962 | rv = -2; | |
963 | ||
964 | return rv; | |
82d9eba6 NB |
965 | } |
966 | ||
967 | struct superswitch super1 = { | |
c7654afc | 968 | #ifndef MDASSEMBLE |
82d9eba6 NB |
969 | .examine_super = examine_super1, |
970 | .brief_examine_super = brief_examine_super1, | |
971 | .detail_super = detail_super1, | |
972 | .brief_detail_super = brief_detail_super1, | |
c7654afc | 973 | #endif |
82d9eba6 NB |
974 | .uuid_from_super = uuid_from_super1, |
975 | .getinfo_super = getinfo_super1, | |
976 | .update_super = update_super1, | |
977 | .event_super = event_super1, | |
978 | .init_super = init_super1, | |
979 | .add_to_super = add_to_super1, | |
980 | .store_super = store_super1, | |
981 | .write_init_super = write_init_super1, | |
982 | .compare_super = compare_super1, | |
983 | .load_super = load_super1, | |
984 | .match_metadata_desc = match_metadata_desc1, | |
985 | .avail_size = avail_size1, | |
34163fc7 NB |
986 | .add_internal_bitmap = add_internal_bitmap1, |
987 | .locate_bitmap = locate_bitmap1, | |
988 | .write_bitmap = write_bitmap1, | |
82d9eba6 | 989 | .major = 1, |
f277ce36 NB |
990 | #if __BYTE_ORDER == BIG_ENDIAN |
991 | .swapuuid = 0, | |
992 | #else | |
993 | .swapuuid = 1, | |
994 | #endif | |
82d9eba6 | 995 | }; |