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82d9eba6 NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4f589ad0 | 4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> |
82d9eba6 NB |
5 | * |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
30 | #include "mdadm.h" | |
82d9eba6 NB |
31 | /* |
32 | * The version-1 superblock : | |
33 | * All numeric fields are little-endian. | |
34 | * | |
35 | * total size: 256 bytes plus 2 per device. | |
36 | * 1K allows 384 devices. | |
37 | */ | |
38 | struct mdp_superblock_1 { | |
39 | /* constant array information - 128 bytes */ | |
40 | __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */ | |
41 | __u32 major_version; /* 1 */ | |
42 | __u32 feature_map; /* 0 for now */ | |
43 | __u32 pad0; /* always set to 0 when writing */ | |
44 | ||
45 | __u8 set_uuid[16]; /* user-space generated. */ | |
46 | char set_name[32]; /* set and interpreted by user-space */ | |
47 | ||
48 | __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/ | |
49 | __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */ | |
50 | __u32 layout; /* only for raid5 currently */ | |
51 | __u64 size; /* used size of component devices, in 512byte sectors */ | |
52 | ||
53 | __u32 chunksize; /* in 512byte sectors */ | |
54 | __u32 raid_disks; | |
34163fc7 NB |
55 | __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts |
56 | * NOTE: signed, so bitmap can be before superblock | |
57 | * only meaningful of feature_map[0] is set. | |
58 | */ | |
b674b5b8 NB |
59 | |
60 | /* These are only valid with feature bit '4' */ | |
b674b5b8 | 61 | __u32 new_level; /* new level we are reshaping to */ |
ac957baa | 62 | __u64 reshape_position; /* next address in array-space for reshape */ |
b674b5b8 NB |
63 | __u32 delta_disks; /* change in number of raid_disks */ |
64 | __u32 new_layout; /* new layout */ | |
65 | __u32 new_chunk; /* new chunk size (bytes) */ | |
66 | __u8 pad1[128-124]; /* set to 0 when written */ | |
82d9eba6 NB |
67 | |
68 | /* constant this-device information - 64 bytes */ | |
69 | __u64 data_offset; /* sector start of data, often 0 */ | |
70 | __u64 data_size; /* sectors in this device that can be used for data */ | |
71 | __u64 super_offset; /* sector start of this superblock */ | |
72 | __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */ | |
73 | __u32 dev_number; /* permanent identifier of this device - not role in raid */ | |
74 | __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */ | |
75 | __u8 device_uuid[16]; /* user-space setable, ignored by kernel */ | |
dfd4d8ee NB |
76 | __u8 devflags; /* per-device flags. Only one defined...*/ |
77 | #define WriteMostly1 1 /* mask for writemostly flag in above */ | |
78 | __u8 pad2[64-57]; /* set to 0 when writing */ | |
82d9eba6 NB |
79 | |
80 | /* array state information - 64 bytes */ | |
81 | __u64 utime; /* 40 bits second, 24 btes microseconds */ | |
82 | __u64 events; /* incremented when superblock updated */ | |
83 | __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */ | |
84 | __u32 sb_csum; /* checksum upto devs[max_dev] */ | |
85 | __u32 max_dev; /* size of devs[] array to consider */ | |
86 | __u8 pad3[64-32]; /* set to 0 when writing */ | |
87 | ||
88 | /* device state information. Indexed by dev_number. | |
89 | * 2 bytes per device | |
90 | * Note there are no per-device state flags. State information is rolled | |
91 | * into the 'roles' value. If a device is spare or faulty, then it doesn't | |
92 | * have a meaningful role. | |
93 | */ | |
94 | __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ | |
95 | }; | |
96 | ||
d2cd3ffc NB |
97 | /* feature_map bits */ |
98 | #define MD_FEATURE_BITMAP_OFFSET 1 | |
99 | #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and | |
100 | * must be honoured | |
101 | */ | |
b674b5b8 | 102 | #define MD_FEATURE_RESHAPE_ACTIVE 4 |
d2cd3ffc | 103 | |
b674b5b8 | 104 | #define MD_FEATURE_ALL (1|2|4) |
d2cd3ffc | 105 | |
570c0542 | 106 | #ifndef offsetof |
82d9eba6 | 107 | #define offsetof(t,f) ((int)&(((t*)0)->f)) |
570c0542 | 108 | #endif |
82d9eba6 NB |
109 | static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb) |
110 | { | |
111 | unsigned int disk_csum, csum; | |
112 | unsigned long long newcsum; | |
113 | int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2; | |
114 | unsigned int *isuper = (unsigned int*)sb; | |
115 | int i; | |
116 | ||
117 | /* make sure I can count... */ | |
118 | if (offsetof(struct mdp_superblock_1,data_offset) != 128 || | |
119 | offsetof(struct mdp_superblock_1, utime) != 192 || | |
120 | sizeof(struct mdp_superblock_1) != 256) { | |
121 | fprintf(stderr, "WARNING - superblock isn't sized correctly\n"); | |
122 | } | |
123 | ||
124 | disk_csum = sb->sb_csum; | |
125 | sb->sb_csum = 0; | |
126 | newcsum = 0; | |
127 | for (i=0; size>=4; size -= 4 ) | |
128 | newcsum += __le32_to_cpu(*isuper++); | |
129 | ||
130 | if (size == 2) | |
131 | newcsum += __le16_to_cpu(*(unsigned short*) isuper); | |
132 | ||
133 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
134 | sb->sb_csum = disk_csum; | |
135 | return csum; | |
136 | } | |
137 | ||
c7654afc | 138 | #ifndef MDASSEMBLE |
82d9eba6 NB |
139 | static void examine_super1(void *sbv) |
140 | { | |
141 | struct mdp_superblock_1 *sb = sbv; | |
142 | time_t atime; | |
143 | int d; | |
6fbba4c9 | 144 | int faulty; |
82d9eba6 NB |
145 | int i; |
146 | char *c; | |
147 | ||
148 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
91eedefc NB |
149 | printf(" Version : %02d\n", 1); |
150 | printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); | |
82d9eba6 NB |
151 | printf(" Array UUID : "); |
152 | for (i=0; i<16; i++) { | |
82d9eba6 | 153 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 154 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 NB |
155 | } |
156 | printf("\n"); | |
157 | printf(" Name : %.32s\n", sb->set_name); | |
158 | ||
159 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
160 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
161 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
162 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
163 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
164 | printf("\n"); | |
570c0542 | 165 | printf(" Device Size : %llu%s\n", (unsigned long long)sb->data_size, human_size(sb->data_size<<9)); |
b674b5b8 NB |
166 | if (__le32_to_cpu(sb->level) >= 0) { |
167 | int ddsks=0; | |
168 | switch(__le32_to_cpu(sb->level)) { | |
169 | case 1: ddsks=1;break; | |
170 | case 4: | |
171 | case 5: ddsks = sb->raid_disks-1; break; | |
172 | case 6: ddsks = sb->raid_disks-2; break; | |
173 | case 10: ddsks = sb->raid_disks / (sb->layout&255) / ((sb->layout>>8)&255); | |
174 | } | |
175 | if (ddsks) | |
176 | printf(" Array Size : %llu%s\n", ddsks*(unsigned long long)sb->size, human_size(ddsks*sb->size<<9)); | |
177 | if (sb->size != sb->data_size) | |
178 | printf(" Used Size : %llu%s\n", (unsigned long long)sb->size, human_size(sb->size<<9)); | |
179 | } | |
82d9eba6 | 180 | if (sb->data_offset) |
570c0542 | 181 | printf(" Data Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->data_offset)); |
82d9eba6 | 182 | if (sb->super_offset) |
570c0542 | 183 | printf(" Super Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->super_offset)); |
d2cd3ffc NB |
184 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) |
185 | printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset)); | |
a3fd117c | 186 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); |
82d9eba6 NB |
187 | printf(" Device UUID : "); |
188 | for (i=0; i<16; i++) { | |
82d9eba6 | 189 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 190 | printf("%02x", sb->device_uuid[i]); |
82d9eba6 NB |
191 | } |
192 | printf("\n"); | |
b674b5b8 | 193 | printf("\n"); |
91eedefc NB |
194 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { |
195 | printf("Internal Bitmap : %ld sectors from superblock\n", | |
8fac0577 NB |
196 | (long)__le32_to_cpu(sb->bitmap_offset)); |
197 | } | |
b674b5b8 | 198 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { |
1e0d770c | 199 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2, |
b674b5b8 NB |
200 | human_size(__le64_to_cpu(sb->reshape_position)<<9)); |
201 | if (__le32_to_cpu(sb->delta_disks)) { | |
202 | printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks)); | |
203 | if (__le32_to_cpu(sb->delta_disks)) | |
204 | printf(" (%d->%d)\n", | |
205 | __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks), | |
206 | __le32_to_cpu(sb->raid_disks)); | |
207 | else | |
208 | printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks), | |
209 | __le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks)); | |
210 | } | |
211 | if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { | |
212 | c = map_num(pers, __le32_to_cpu(sb->new_level)); | |
213 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
214 | } | |
215 | if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) { | |
216 | if (__le32_to_cpu(sb->level) == 5) { | |
217 | c = map_num(r5layout, __le32_to_cpu(sb->new_layout)); | |
218 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
219 | } | |
220 | if (__le32_to_cpu(sb->level) == 10) { | |
b578481c | 221 | printf(" New Layout : near=%d, %s=%d\n", |
b674b5b8 | 222 | __le32_to_cpu(sb->new_layout)&255, |
b578481c | 223 | (__le32_to_cpu(sb->new_layout)&0x10000)?"offset":"far", |
b674b5b8 NB |
224 | (__le32_to_cpu(sb->new_layout)>>8)&255); |
225 | } | |
226 | } | |
227 | if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) | |
228 | printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); | |
229 | printf("\n"); | |
230 | } | |
dfd4d8ee NB |
231 | if (sb->devflags) { |
232 | printf(" Flags :"); | |
34163fc7 | 233 | if (sb->devflags & WriteMostly1) |
dfd4d8ee NB |
234 | printf(" write-mostly"); |
235 | printf("\n"); | |
236 | } | |
82d9eba6 NB |
237 | |
238 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
239 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
240 | ||
241 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
242 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
243 | else | |
244 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
245 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
570c0542 | 246 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
247 | printf("\n"); |
248 | if (__le32_to_cpu(sb->level) == 5) { | |
249 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
250 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
251 | } | |
265e0f17 NB |
252 | if (__le32_to_cpu(sb->level) == 10) { |
253 | int lo = __le32_to_cpu(sb->layout); | |
b578481c NB |
254 | printf(" Layout : near=%d, %s=%d\n", |
255 | lo&255, | |
256 | (lo&0x10000)?"offset":"far", | |
257 | (lo>>8)&255); | |
265e0f17 | 258 | } |
82d9eba6 NB |
259 | switch(__le32_to_cpu(sb->level)) { |
260 | case 0: | |
261 | case 4: | |
262 | case 5: | |
d2cd3ffc NB |
263 | case 6: |
264 | case 10: | |
b674b5b8 | 265 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); |
82d9eba6 NB |
266 | break; |
267 | case -1: | |
b674b5b8 | 268 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); |
82d9eba6 NB |
269 | break; |
270 | default: break; | |
271 | } | |
272 | printf("\n"); | |
273 | printf(" Array State : "); | |
274 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
275 | int cnt = 0; | |
276 | int me = 0; | |
277 | int i; | |
278 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
279 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
280 | if (role == d) { | |
281 | if (i == __le32_to_cpu(sb->dev_number)) | |
282 | me = 1; | |
283 | cnt++; | |
284 | } | |
285 | } | |
286 | if (cnt > 1) printf("?"); | |
287 | else if (cnt == 1 && me) printf("U"); | |
288 | else if (cnt == 1) printf("u"); | |
289 | else printf ("_"); | |
290 | } | |
6fbba4c9 | 291 | faulty = 0; |
82d9eba6 NB |
292 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
293 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
6fbba4c9 NB |
294 | if (role == 0xFFFE) |
295 | faulty++; | |
82d9eba6 | 296 | } |
82d9eba6 NB |
297 | if (faulty) printf(" %d failed", faulty); |
298 | printf("\n"); | |
299 | } | |
300 | ||
301 | ||
302 | static void brief_examine_super1(void *sbv) | |
303 | { | |
304 | struct mdp_superblock_1 *sb = sbv; | |
305 | int i; | |
306 | ||
307 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
308 | ||
309 | printf("ARRAY /dev/?? level=%s metadata=1 num-devices=%d UUID=", | |
310 | c?c:"-unknown-", sb->raid_disks); | |
311 | for (i=0; i<16; i++) { | |
312 | printf("%02x", sb->set_uuid[i]); | |
313 | if ((i&3)==0 && i != 0) printf(":"); | |
314 | } | |
947fd4dd NB |
315 | if (sb->set_name[0]) |
316 | printf(" name=%.32s", sb->set_name); | |
82d9eba6 NB |
317 | printf("\n"); |
318 | } | |
319 | ||
b6750aa8 | 320 | static void detail_super1(void *sbv, char *homehost) |
82d9eba6 NB |
321 | { |
322 | struct mdp_superblock_1 *sb = sbv; | |
323 | int i; | |
b6750aa8 | 324 | int l = homehost ? strlen(homehost) : 0; |
82d9eba6 | 325 | |
b6750aa8 NB |
326 | printf(" Name : %.32s", sb->set_name); |
327 | if (l > 0 && l < 32 && | |
328 | sb->set_name[l] == ':' && | |
329 | strncmp(sb->set_name, homehost, l) == 0) | |
330 | printf(" (local to host %s)", homehost); | |
331 | printf("\n UUID : "); | |
82d9eba6 | 332 | for (i=0; i<16; i++) { |
82d9eba6 | 333 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 334 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 | 335 | } |
570c0542 | 336 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
337 | } |
338 | ||
339 | static void brief_detail_super1(void *sbv) | |
340 | { | |
341 | struct mdp_superblock_1 *sb = sbv; | |
342 | int i; | |
343 | ||
947fd4dd NB |
344 | if (sb->set_name[0]) |
345 | printf(" name=%.32s", sb->set_name); | |
82d9eba6 NB |
346 | printf(" UUID="); |
347 | for (i=0; i<16; i++) { | |
82d9eba6 | 348 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 349 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 NB |
350 | } |
351 | } | |
352 | ||
c7654afc NB |
353 | #endif |
354 | ||
82d9eba6 NB |
355 | static void uuid_from_super1(int uuid[4], void * sbv) |
356 | { | |
357 | struct mdp_superblock_1 *super = sbv; | |
358 | char *cuuid = (char*)uuid; | |
359 | int i; | |
360 | for (i=0; i<16; i++) | |
361 | cuuid[i] = super->set_uuid[i]; | |
362 | } | |
363 | ||
31317663 | 364 | static void getinfo_super1(struct mdinfo *info, void *sbv) |
82d9eba6 NB |
365 | { |
366 | struct mdp_superblock_1 *sb = sbv; | |
367 | int working = 0; | |
368 | int i; | |
369 | int role; | |
370 | ||
371 | info->array.major_version = 1; | |
372 | info->array.minor_version = __le32_to_cpu(sb->feature_map); | |
373 | info->array.patch_version = 0; | |
374 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
375 | info->array.level = __le32_to_cpu(sb->level); | |
265e0f17 | 376 | info->array.layout = __le32_to_cpu(sb->layout); |
82d9eba6 NB |
377 | info->array.md_minor = -1; |
378 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
353632d9 | 379 | info->array.utime = __le64_to_cpu(sb->utime); |
bed256c2 | 380 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; |
353632d9 NB |
381 | |
382 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
383 | info->component_size = __le64_to_cpu(sb->size); | |
82d9eba6 NB |
384 | |
385 | info->disk.major = 0; | |
386 | info->disk.minor = 0; | |
fbf8a0b7 | 387 | info->disk.number = __le32_to_cpu(sb->dev_number); |
82d9eba6 NB |
388 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || |
389 | __le32_to_cpu(sb->max_dev) > 512) | |
390 | role = 0xfffe; | |
391 | else | |
392 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
393 | ||
394 | info->disk.raid_disk = -1; | |
395 | switch(role) { | |
396 | case 0xFFFF: | |
397 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
398 | break; | |
399 | case 0xFFFE: | |
400 | info->disk.state = 1; /* faulty */ | |
401 | break; | |
402 | default: | |
403 | info->disk.state = 6; /* active and in sync */ | |
404 | info->disk.raid_disk = role; | |
405 | } | |
406 | info->events = __le64_to_cpu(sb->events); | |
407 | ||
408 | memcpy(info->uuid, sb->set_uuid, 16); | |
409 | ||
31317663 NB |
410 | strncpy(info->name, sb->set_name, 32); |
411 | info->name[32] = 0; | |
947fd4dd | 412 | |
353632d9 NB |
413 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { |
414 | info->reshape_active = 1; | |
415 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
416 | info->new_level = __le32_to_cpu(sb->new_level); | |
417 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
418 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
bed256c2 | 419 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; |
353632d9 NB |
420 | } else |
421 | info->reshape_active = 0; | |
422 | ||
82d9eba6 NB |
423 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
424 | role = __le16_to_cpu(sb->dev_roles[i]); | |
fbf8a0b7 | 425 | if (/*role == 0xFFFF || */role < info->array.raid_disks) |
82d9eba6 NB |
426 | working++; |
427 | } | |
428 | ||
429 | info->array.working_disks = working; | |
430 | } | |
431 | ||
432 | static int update_super1(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose) | |
433 | { | |
c4d831e1 NB |
434 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. |
435 | * For others, the return value is ignored. | |
436 | */ | |
82d9eba6 NB |
437 | int rv = 0; |
438 | struct mdp_superblock_1 *sb = sbv; | |
439 | ||
440 | if (strcmp(update, "force")==0) { | |
c4d831e1 NB |
441 | if (sb->events != __cpu_to_le64(info->events)) |
442 | rv = 1; | |
6d3d5804 | 443 | sb->events = __cpu_to_le64(info->events); |
82d9eba6 NB |
444 | switch(__le32_to_cpu(sb->level)) { |
445 | case 5: case 4: case 6: | |
446 | /* need to force clean */ | |
c4d831e1 NB |
447 | if (sb->resync_offset != ~0ULL) |
448 | rv = 1; | |
82d9eba6 NB |
449 | sb->resync_offset = ~0ULL; |
450 | } | |
451 | } | |
452 | if (strcmp(update, "assemble")==0) { | |
453 | int d = info->disk.number; | |
454 | int want; | |
455 | if (info->disk.state == 6) | |
456 | want = __cpu_to_le32(info->disk.raid_disk); | |
457 | else | |
458 | want = 0xFFFF; | |
459 | if (sb->dev_roles[d] != want) { | |
460 | sb->dev_roles[d] = want; | |
461 | rv = 1; | |
462 | } | |
463 | } | |
464 | #if 0 | |
465 | if (strcmp(update, "newdev") == 0) { | |
466 | int d = info->disk.number; | |
467 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
468 | sb->disks[d].number = d; | |
469 | sb->disks[d].major = info->disk.major; | |
470 | sb->disks[d].minor = info->disk.minor; | |
471 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
472 | sb->disks[d].state = info->disk.state; | |
473 | sb->this_disk = sb->disks[d]; | |
474 | } | |
475 | #endif | |
476 | if (strcmp(update, "grow") == 0) { | |
477 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
478 | /* FIXME */ | |
479 | } | |
480 | if (strcmp(update, "resync") == 0) { | |
481 | /* make sure resync happens */ | |
482 | sb->resync_offset = ~0ULL; | |
483 | } | |
14263cf1 | 484 | if (strcmp(update, "uuid") == 0) { |
838acbc2 | 485 | memcpy(sb->set_uuid, info->uuid, 16); |
14263cf1 NB |
486 | if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) { |
487 | struct bitmap_super_s *bm; | |
488 | bm = (struct bitmap_super_s*)(sbv+1024); | |
489 | memcpy(bm->uuid, info->uuid, 16); | |
490 | } | |
491 | } | |
353632d9 NB |
492 | if (strcmp(update, "_reshape_progress")==0) |
493 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
82d9eba6 NB |
494 | |
495 | sb->sb_csum = calc_sb_1_csum(sb); | |
496 | return rv; | |
497 | } | |
498 | ||
499 | ||
500 | static __u64 event_super1(void *sbv) | |
501 | { | |
502 | struct mdp_superblock_1 *sb = sbv; | |
503 | return __le64_to_cpu(sb->events); | |
504 | } | |
505 | ||
05697ec1 NB |
506 | static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info, |
507 | unsigned long long size, char *name, char *homehost) | |
82d9eba6 | 508 | { |
34163fc7 | 509 | struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t)); |
82d9eba6 | 510 | int spares; |
34163fc7 | 511 | int rfd; |
05697ec1 | 512 | char defname[10]; |
82d9eba6 NB |
513 | memset(sb, 0, 1024); |
514 | ||
05697ec1 | 515 | if (info->major_version == -1) { |
82d9eba6 | 516 | /* zeroing superblock */ |
05697ec1 | 517 | *sbp = sb; |
82d9eba6 | 518 | return 0; |
05697ec1 | 519 | } |
82d9eba6 NB |
520 | |
521 | spares = info->working_disks - info->active_disks; | |
522 | if (info->raid_disks + spares > 384) { | |
523 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
524 | info->raid_disks , spares, 384); | |
525 | return 0; | |
526 | } | |
527 | ||
82d9eba6 NB |
528 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); |
529 | sb->major_version = __cpu_to_le32(1); | |
530 | sb->feature_map = 0; | |
531 | sb->pad0 = 0; | |
34163fc7 NB |
532 | |
533 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
534 | read(rfd, sb->set_uuid, 16) != 16) { | |
535 | *(__u32*)(sb->set_uuid) = random(); | |
536 | *(__u32*)(sb->set_uuid+4) = random(); | |
537 | *(__u32*)(sb->set_uuid+8) = random(); | |
538 | *(__u32*)(sb->set_uuid+12) = random(); | |
539 | } | |
540 | if (rfd >= 0) close(rfd); | |
82d9eba6 | 541 | |
05697ec1 NB |
542 | if (name == NULL || *name == 0) { |
543 | sprintf(defname, "%d", info->md_minor); | |
544 | name = defname; | |
545 | } | |
947fd4dd | 546 | memset(sb->set_name, 0, 32); |
05697ec1 NB |
547 | if (homehost && |
548 | strchr(name, ':')== NULL && | |
549 | strlen(homehost)+1+strlen(name) < 32) { | |
550 | strcpy(sb->set_name, homehost); | |
551 | strcat(sb->set_name, ":"); | |
552 | strcat(sb->set_name, name); | |
553 | } else | |
554 | strcpy(sb->set_name, name); | |
82d9eba6 NB |
555 | |
556 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
557 | sb->level = __cpu_to_le32(info->level); | |
ea329559 | 558 | sb->layout = __cpu_to_le32(info->layout); |
5dd497ee | 559 | sb->size = __cpu_to_le64(size*2ULL); |
82d9eba6 NB |
560 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); |
561 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
562 | ||
563 | sb->data_offset = __cpu_to_le64(0); | |
564 | sb->data_size = __cpu_to_le64(0); | |
565 | sb->super_offset = __cpu_to_le64(0); | |
566 | sb->recovery_offset = __cpu_to_le64(0); | |
567 | ||
568 | sb->utime = sb->ctime; | |
569 | sb->events = __cpu_to_le64(1); | |
34321279 | 570 | if (info->state & (1<<MD_SB_CLEAN)) |
82d9eba6 NB |
571 | sb->resync_offset = ~0ULL; |
572 | else | |
573 | sb->resync_offset = 0; | |
34163fc7 | 574 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ |
82d9eba6 NB |
575 | sizeof(sb->dev_roles[0])); |
576 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
577 | ||
578 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
579 | ||
580 | *sbp = sb; | |
581 | return 1; | |
582 | } | |
583 | ||
584 | /* Add a device to the superblock being created */ | |
585 | static void add_to_super1(void *sbv, mdu_disk_info_t *dk) | |
586 | { | |
587 | struct mdp_superblock_1 *sb = sbv; | |
588 | __u16 *rp = sb->dev_roles + dk->number; | |
dfd4d8ee | 589 | if ((dk->state & 6) == 6) /* active, sync */ |
82d9eba6 | 590 | *rp = __cpu_to_le16(dk->raid_disk); |
412ca2e5 | 591 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ |
82d9eba6 | 592 | *rp = 0xffff; |
34163fc7 | 593 | else |
82d9eba6 NB |
594 | *rp = 0xfffe; |
595 | } | |
596 | ||
14263cf1 NB |
597 | static void locate_bitmap1(struct supertype *st, int fd, void *sbv); |
598 | ||
96395475 | 599 | static int store_super1(struct supertype *st, int fd, void *sbv) |
82d9eba6 NB |
600 | { |
601 | struct mdp_superblock_1 *sb = sbv; | |
6fbba4c9 | 602 | unsigned long long sb_offset; |
82d9eba6 | 603 | int sbsize; |
5dd497ee NB |
604 | unsigned long size; |
605 | unsigned long long dsize; | |
96395475 | 606 | |
5dd497ee NB |
607 | #ifdef BLKGETSIZE64 |
608 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
609 | #endif | |
610 | { | |
611 | if (ioctl(fd, BLKGETSIZE, &size)) | |
612 | return 1; | |
613 | else | |
614 | dsize = (unsigned long long)size; | |
615 | } else | |
616 | dsize >>= 9; | |
96395475 | 617 | |
5dd497ee | 618 | if (dsize < 24) |
96395475 NB |
619 | return 2; |
620 | ||
621 | /* | |
622 | * Calculate the position of the superblock. | |
623 | * It is always aligned to a 4K boundary and | |
624 | * depending on minor_version, it can be: | |
625 | * 0: At least 8K, but less than 12K, from end of device | |
626 | * 1: At start of device | |
627 | * 2: 4K from start of device. | |
628 | */ | |
629 | switch(st->minor_version) { | |
630 | case 0: | |
5dd497ee | 631 | sb_offset = dsize; |
96395475 NB |
632 | sb_offset -= 8*2; |
633 | sb_offset &= ~(4*2-1); | |
634 | break; | |
635 | case 1: | |
6fbba4c9 | 636 | sb_offset = 0; |
96395475 NB |
637 | break; |
638 | case 2: | |
639 | sb_offset = 4*2; | |
640 | break; | |
641 | default: | |
642 | return -EINVAL; | |
643 | } | |
644 | ||
82d9eba6 | 645 | |
34163fc7 | 646 | |
6fbba4c9 NB |
647 | if (sb_offset != __le64_to_cpu(sb->super_offset) && |
648 | 0 != __le64_to_cpu(sb->super_offset) | |
96395475 NB |
649 | ) { |
650 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
651 | abort(); | |
652 | } | |
82d9eba6 | 653 | |
6fbba4c9 | 654 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) |
82d9eba6 NB |
655 | return 3; |
656 | ||
657 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
658 | ||
659 | if (write(fd, sb, sbsize) != sbsize) | |
660 | return 4; | |
661 | ||
14263cf1 NB |
662 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { |
663 | struct bitmap_super_s *bm = (struct bitmap_super_s*) | |
664 | ((char*)sb)+1024; | |
665 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { | |
666 | locate_bitmap1(st, fd, sbv); | |
667 | write(fd, bm, sizeof(*bm)); | |
668 | } | |
669 | } | |
570c0542 | 670 | fsync(fd); |
82d9eba6 NB |
671 | return 0; |
672 | } | |
673 | ||
892debc8 NB |
674 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname); |
675 | ||
34163fc7 | 676 | static int write_init_super1(struct supertype *st, void *sbv, |
1bf4e2d9 | 677 | mdu_disk_info_t *dinfo, char *devname) |
82d9eba6 NB |
678 | { |
679 | struct mdp_superblock_1 *sb = sbv; | |
e478dc86 | 680 | void *refsbv = NULL; |
892debc8 | 681 | int fd = open(devname, O_RDWR | O_EXCL); |
dfe47e00 | 682 | int rfd; |
82d9eba6 NB |
683 | int rv; |
684 | ||
8fac0577 NB |
685 | unsigned long size, space; |
686 | unsigned long long dsize, array_size; | |
82d9eba6 NB |
687 | long long sb_offset; |
688 | ||
689 | ||
690 | if (fd < 0) { | |
691 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", | |
692 | devname); | |
693 | return -1; | |
694 | } | |
695 | ||
696 | sb->dev_number = __cpu_to_le32(dinfo->number); | |
34163fc7 | 697 | if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY)) |
dfd4d8ee | 698 | sb->devflags |= WriteMostly1; |
892debc8 | 699 | |
dfe47e00 NB |
700 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
701 | read(rfd, sb->device_uuid, 16) != 16) { | |
702 | *(__u32*)(sb->device_uuid) = random(); | |
703 | *(__u32*)(sb->device_uuid+4) = random(); | |
704 | *(__u32*)(sb->device_uuid+8) = random(); | |
705 | *(__u32*)(sb->device_uuid+12) = random(); | |
706 | } | |
707 | if (rfd >= 0) close(rfd); | |
892debc8 NB |
708 | sb->events = 0; |
709 | ||
e478dc86 NB |
710 | if (load_super1(st, fd, &refsbv, NULL)==0) { |
711 | struct mdp_superblock_1 *refsb = refsbv; | |
712 | ||
892debc8 NB |
713 | memcpy(sb->device_uuid, refsb->device_uuid, 16); |
714 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
715 | /* same array, so preserve events and dev_number */ | |
716 | sb->events = refsb->events; | |
717 | sb->dev_number = refsb->dev_number; | |
718 | } | |
719 | free(refsb); | |
720 | } | |
34163fc7 | 721 | |
5dd497ee NB |
722 | #ifdef BLKGETSIZE64 |
723 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
724 | #endif | |
725 | { | |
726 | if (ioctl(fd, BLKGETSIZE, &size)) | |
727 | return 1; | |
728 | else | |
729 | dsize = size; | |
730 | } else | |
731 | dsize >>= 9; | |
82d9eba6 | 732 | |
5dd497ee | 733 | if (dsize < 24) { |
024ce7fe | 734 | close(fd); |
82d9eba6 | 735 | return 2; |
024ce7fe | 736 | } |
82d9eba6 NB |
737 | |
738 | ||
739 | /* | |
740 | * Calculate the position of the superblock. | |
741 | * It is always aligned to a 4K boundary and | |
742 | * depending on minor_version, it can be: | |
743 | * 0: At least 8K, but less than 12K, from end of device | |
744 | * 1: At start of device | |
745 | * 2: 4K from start of device. | |
21e92547 NB |
746 | * Depending on the array size, we might leave extra space |
747 | * for a bitmap. | |
82d9eba6 | 748 | */ |
8fac0577 | 749 | array_size = __le64_to_cpu(sb->size); |
82d9eba6 NB |
750 | switch(st->minor_version) { |
751 | case 0: | |
5dd497ee | 752 | sb_offset = dsize; |
82d9eba6 NB |
753 | sb_offset -= 8*2; |
754 | sb_offset &= ~(4*2-1); | |
755 | sb->super_offset = __cpu_to_le64(sb_offset); | |
756 | sb->data_offset = __cpu_to_le64(0); | |
561832f9 | 757 | if (sb_offset-64*2 >= array_size && array_size > 8*1024*1024*2) |
21e92547 NB |
758 | sb->data_size = __cpu_to_le64(sb_offset-64*2); |
759 | else | |
760 | sb->data_size = __cpu_to_le64(sb_offset); | |
82d9eba6 NB |
761 | break; |
762 | case 1: | |
763 | sb->super_offset = __cpu_to_le64(0); | |
561832f9 | 764 | if (dsize - 64*2 >= array_size && array_size > 8*1024*1024*2) |
21e92547 NB |
765 | space = 64*2; |
766 | else | |
767 | space = 4*2; | |
768 | sb->data_offset = __cpu_to_le64(space); /* leave space for super and bitmap */ | |
769 | sb->data_size = __cpu_to_le64(dsize - space); | |
82d9eba6 NB |
770 | break; |
771 | case 2: | |
772 | sb_offset = 4*2; | |
561832f9 | 773 | if (dsize - 4*2 - 64*2 >= array_size && array_size > 8*1024*1024*2) |
21e92547 NB |
774 | space = 64*2; |
775 | else | |
776 | space = 4*2; | |
82d9eba6 | 777 | sb->super_offset = __cpu_to_le64(sb_offset); |
21e92547 NB |
778 | sb->data_offset = __cpu_to_le64(sb_offset+space); |
779 | sb->data_size = __cpu_to_le64(dsize - 4*2 - space); | |
82d9eba6 NB |
780 | break; |
781 | default: | |
782 | return -EINVAL; | |
783 | } | |
784 | ||
785 | ||
786 | sb->sb_csum = calc_sb_1_csum(sb); | |
96395475 | 787 | rv = store_super1(st, fd, sb); |
82d9eba6 NB |
788 | if (rv) |
789 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
34163fc7 | 790 | |
1bf4e2d9 NB |
791 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) |
792 | rv = st->ss->write_bitmap(st, fd, sbv); | |
024ce7fe | 793 | close(fd); |
82d9eba6 NB |
794 | return rv; |
795 | } | |
796 | ||
797 | static int compare_super1(void **firstp, void *secondv) | |
798 | { | |
799 | /* | |
800 | * return: | |
801 | * 0 same, or first was empty, and second was copied | |
802 | * 1 second had wrong number | |
803 | * 2 wrong uuid | |
804 | * 3 wrong other info | |
805 | */ | |
806 | struct mdp_superblock_1 *first = *firstp; | |
807 | struct mdp_superblock_1 *second = secondv; | |
808 | ||
809 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
810 | return 1; | |
811 | if (second->major_version != __cpu_to_le32(1)) | |
812 | return 1; | |
813 | ||
814 | if (!first) { | |
14263cf1 NB |
815 | first = malloc(1024+sizeof(bitmap_super_t)); |
816 | memcpy(first, second, 1024+sizeof(bitmap_super_t)); | |
82d9eba6 NB |
817 | *firstp = first; |
818 | return 0; | |
819 | } | |
820 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
821 | return 2; | |
822 | ||
823 | if (first->ctime != second->ctime || | |
824 | first->level != second->level || | |
825 | first->layout != second->layout || | |
826 | first->size != second->size || | |
827 | first->chunksize != second->chunksize || | |
828 | first->raid_disks != second->raid_disks) | |
829 | return 3; | |
830 | return 0; | |
831 | } | |
832 | ||
833 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname) | |
834 | { | |
835 | unsigned long size; | |
5dd497ee | 836 | unsigned long long dsize; |
82d9eba6 NB |
837 | unsigned long long sb_offset; |
838 | struct mdp_superblock_1 *super; | |
14263cf1 NB |
839 | int uuid[4]; |
840 | struct bitmap_super_s *bsb; | |
82d9eba6 NB |
841 | |
842 | ||
843 | if (st->ss == NULL) { | |
570c0542 NB |
844 | int bestvers = -1; |
845 | __u64 bestctime = 0; | |
846 | /* guess... choose latest ctime */ | |
82d9eba6 NB |
847 | st->ss = &super1; |
848 | for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) { | |
849 | switch(load_super1(st, fd, sbp, devname)) { | |
570c0542 NB |
850 | case 0: super = *sbp; |
851 | if (bestvers == -1 || | |
852 | bestctime < __le64_to_cpu(super->ctime)) { | |
853 | bestvers = st->minor_version; | |
854 | bestctime = __le64_to_cpu(super->ctime); | |
855 | } | |
856 | free(super); | |
857 | *sbp = NULL; | |
858 | break; | |
82d9eba6 NB |
859 | case 1: st->ss = NULL; return 1; /*bad device */ |
860 | case 2: break; /* bad, try next */ | |
861 | } | |
862 | } | |
570c0542 NB |
863 | if (bestvers != -1) { |
864 | int rv; | |
865 | st->minor_version = bestvers; | |
866 | st->ss = &super1; | |
ea329559 | 867 | st->max_devs = 384; |
570c0542 NB |
868 | rv = load_super1(st, fd, sbp, devname); |
869 | if (rv) st->ss = NULL; | |
870 | return rv; | |
871 | } | |
82d9eba6 NB |
872 | st->ss = NULL; |
873 | return 2; | |
874 | } | |
5dd497ee NB |
875 | #ifdef BLKGETSIZE64 |
876 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
877 | #endif | |
878 | { | |
879 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
880 | if (devname) | |
881 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
882 | devname, strerror(errno)); | |
883 | return 1; | |
884 | } | |
885 | dsize = size; | |
886 | } else | |
887 | dsize >>= 9; | |
82d9eba6 | 888 | |
5dd497ee | 889 | if (dsize < 24) { |
82d9eba6 | 890 | if (devname) |
5dd497ee NB |
891 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", |
892 | devname, dsize); | |
82d9eba6 NB |
893 | return 1; |
894 | } | |
895 | ||
896 | /* | |
897 | * Calculate the position of the superblock. | |
898 | * It is always aligned to a 4K boundary and | |
14263cf1 | 899 | * depending on minor_version, it can be: |
82d9eba6 NB |
900 | * 0: At least 8K, but less than 12K, from end of device |
901 | * 1: At start of device | |
902 | * 2: 4K from start of device. | |
903 | */ | |
904 | switch(st->minor_version) { | |
905 | case 0: | |
5dd497ee | 906 | sb_offset = dsize; |
82d9eba6 NB |
907 | sb_offset -= 8*2; |
908 | sb_offset &= ~(4*2-1); | |
909 | break; | |
910 | case 1: | |
911 | sb_offset = 0; | |
912 | break; | |
913 | case 2: | |
914 | sb_offset = 4*2; | |
915 | break; | |
916 | default: | |
917 | return -EINVAL; | |
918 | } | |
919 | ||
920 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
921 | ||
922 | ||
923 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
924 | if (devname) | |
925 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
926 | devname, strerror(errno)); | |
927 | return 1; | |
928 | } | |
929 | ||
34163fc7 | 930 | super = malloc(1024 + sizeof(bitmap_super_t)); |
82d9eba6 NB |
931 | |
932 | if (read(fd, super, 1024) != 1024) { | |
933 | if (devname) | |
934 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
935 | devname); | |
936 | free(super); | |
937 | return 1; | |
938 | } | |
939 | ||
940 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
941 | if (devname) | |
942 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
943 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
944 | free(super); | |
945 | return 2; | |
946 | } | |
947 | ||
948 | if (__le32_to_cpu(super->major_version) != 1) { | |
949 | if (devname) | |
950 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
951 | devname, __le32_to_cpu(super->major_version)); | |
952 | free(super); | |
953 | return 2; | |
954 | } | |
955 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
956 | if (devname) | |
957 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
958 | devname); | |
959 | free(super); | |
960 | return 2; | |
961 | } | |
962 | *sbp = super; | |
14263cf1 NB |
963 | |
964 | /* Now check on the bitmap superblock */ | |
965 | if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0) | |
966 | return 0; | |
967 | /* Read the bitmap superblock and make sure it looks | |
968 | * valid. If it doesn't clear the bit. An --assemble --force | |
969 | * should get that written out. | |
970 | */ | |
971 | locate_bitmap1(st, fd, super); | |
972 | if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s)) | |
973 | != sizeof(struct bitmap_super_s)) | |
974 | goto no_bitmap; | |
975 | ||
976 | uuid_from_super1(uuid, super); | |
977 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
978 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
979 | memcmp(bsb->uuid, uuid, 16) != 0) | |
980 | goto no_bitmap; | |
981 | return 0; | |
982 | ||
983 | no_bitmap: | |
984 | super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1); | |
82d9eba6 NB |
985 | return 0; |
986 | } | |
987 | ||
988 | ||
989 | static struct supertype *match_metadata_desc1(char *arg) | |
990 | { | |
991 | struct supertype *st = malloc(sizeof(*st)); | |
992 | if (!st) return st; | |
993 | ||
994 | st->ss = &super1; | |
ea329559 | 995 | st->max_devs = 384; |
82d9eba6 | 996 | if (strcmp(arg, "1") == 0 || |
576d6d83 NB |
997 | strcmp(arg, "1.0") == 0 || |
998 | strcmp(arg, "default/large") == 0) { | |
82d9eba6 NB |
999 | st->minor_version = 0; |
1000 | return st; | |
1001 | } | |
1002 | if (strcmp(arg, "1.1") == 0) { | |
1003 | st->minor_version = 1; | |
1004 | return st; | |
1005 | } | |
1006 | if (strcmp(arg, "1.2") == 0) { | |
1007 | st->minor_version = 2; | |
1008 | return st; | |
1009 | } | |
1010 | ||
1011 | free(st); | |
1012 | return NULL; | |
1013 | } | |
1014 | ||
34163fc7 NB |
1015 | /* find available size on device with this devsize, using |
1016 | * superblock type st, and reserving 'reserve' sectors for | |
1017 | * a possible bitmap | |
1018 | */ | |
1bf4e2d9 | 1019 | static __u64 avail_size1(struct supertype *st, __u64 devsize) |
82d9eba6 NB |
1020 | { |
1021 | if (devsize < 24) | |
1022 | return 0; | |
1023 | ||
21e92547 NB |
1024 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, |
1025 | * if biffer than 200Gig, save 128k | |
1026 | */ | |
1027 | if (devsize > 200*1024*1024*2) | |
1028 | devsize -= 128*2; | |
1029 | else if (devsize > 8*1024*1024*2) | |
1030 | devsize -= 64*2; | |
1031 | ||
34163fc7 NB |
1032 | switch(st->minor_version) { |
1033 | case 0: | |
1bf4e2d9 NB |
1034 | /* at end */ |
1035 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
34163fc7 | 1036 | case 1: |
1bf4e2d9 NB |
1037 | /* at start, 4K for superblock and possible bitmap */ |
1038 | return devsize - 4*2; | |
34163fc7 | 1039 | case 2: |
1bf4e2d9 NB |
1040 | /* 4k from start, 4K for superblock and possible bitmap */ |
1041 | return devsize - (4+4)*2; | |
34163fc7 NB |
1042 | } |
1043 | return 0; | |
1044 | } | |
1045 | ||
1bf4e2d9 NB |
1046 | static int |
1047 | add_internal_bitmap1(struct supertype *st, void *sbv, | |
21e92547 NB |
1048 | int chunk, int delay, int write_behind, unsigned long long size, |
1049 | int may_change, int major) | |
34163fc7 NB |
1050 | { |
1051 | /* | |
1bf4e2d9 NB |
1052 | * If not may_change, then this is a 'Grow', and the bitmap |
1053 | * must fit after the superblock. | |
1054 | * If may_change, then this is create, and we can put the bitmap | |
1055 | * before the superblock if we like, or may move the start. | |
1056 | * For now, just squeeze the bitmap into 3k and don't change anything. | |
34163fc7 | 1057 | * |
f9c25f1d | 1058 | * size is in sectors, chunk is in bytes !!! |
34163fc7 NB |
1059 | */ |
1060 | ||
1bf4e2d9 NB |
1061 | unsigned long long bits; |
1062 | unsigned long long max_bits = (3*512 - sizeof(bitmap_super_t)) * 8; | |
34163fc7 NB |
1063 | unsigned long long min_chunk; |
1064 | struct mdp_superblock_1 *sb = sbv; | |
1065 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
1066 | ||
1bf4e2d9 NB |
1067 | if (st->minor_version && !may_change && |
1068 | __le64_to_cpu(sb->data_offset) - __le64_to_cpu(sb->super_offset) < 8) | |
1069 | return 0; /* doesn't fit */ | |
1070 | ||
1071 | ||
34163fc7 NB |
1072 | |
1073 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
f9c25f1d | 1074 | bits = (size*512)/min_chunk +1; |
34163fc7 NB |
1075 | while (bits > max_bits) { |
1076 | min_chunk *= 2; | |
1077 | bits = (bits+1)/2; | |
1078 | } | |
1079 | if (chunk == UnSet) | |
1080 | chunk = min_chunk; | |
1081 | else if (chunk < min_chunk) | |
1082 | return 0; /* chunk size too small */ | |
21e92547 NB |
1083 | if (chunk == 0) /* rounding problem */ |
1084 | return 0; | |
34163fc7 | 1085 | |
1bf4e2d9 | 1086 | sb->bitmap_offset = __cpu_to_le32(2); |
34163fc7 NB |
1087 | |
1088 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
29e766a5 | 1089 | memset(bms, 0, sizeof(*bms)); |
34163fc7 | 1090 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
dcec9ee5 | 1091 | bms->version = __cpu_to_le32(major); |
34163fc7 NB |
1092 | uuid_from_super1((int*)bms->uuid, sb); |
1093 | bms->chunksize = __cpu_to_le32(chunk); | |
1094 | bms->daemon_sleep = __cpu_to_le32(delay); | |
f9c25f1d | 1095 | bms->sync_size = __cpu_to_le64(size); |
34163fc7 NB |
1096 | bms->write_behind = __cpu_to_le32(write_behind); |
1097 | ||
34163fc7 NB |
1098 | return 1; |
1099 | } | |
1100 | ||
1101 | ||
14263cf1 | 1102 | static void locate_bitmap1(struct supertype *st, int fd, void *sbv) |
34163fc7 | 1103 | { |
34163fc7 | 1104 | unsigned long long offset; |
1e0d770c NB |
1105 | struct mdp_superblock_1 *sb; |
1106 | int mustfree = 0; | |
34163fc7 | 1107 | |
1e0d770c NB |
1108 | if (!sbv) { |
1109 | if (st->ss->load_super(st, fd, &sbv, NULL)) | |
f6d75de8 | 1110 | return; /* no error I hope... */ |
1e0d770c NB |
1111 | mustfree = 1; |
1112 | } | |
1113 | sb = sbv; | |
e478dc86 | 1114 | |
1bf4e2d9 NB |
1115 | offset = __le64_to_cpu(sb->super_offset); |
1116 | offset += (long) __le32_to_cpu(sb->bitmap_offset); | |
1e0d770c | 1117 | if (mustfree) |
f6d75de8 | 1118 | free(sb); |
1bf4e2d9 | 1119 | lseek64(fd, offset<<9, 0); |
34163fc7 NB |
1120 | } |
1121 | ||
14263cf1 | 1122 | static int write_bitmap1(struct supertype *st, int fd, void *sbv) |
34163fc7 NB |
1123 | { |
1124 | struct mdp_superblock_1 *sb = sbv; | |
1bf4e2d9 | 1125 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); |
34163fc7 NB |
1126 | int rv = 0; |
1127 | ||
1128 | int towrite, n; | |
1129 | char buf[4096]; | |
1130 | ||
f6d75de8 | 1131 | locate_bitmap1(st, fd, sbv); |
34163fc7 | 1132 | |
1e0d770c NB |
1133 | if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) != |
1134 | sizeof(bitmap_super_t)) | |
1135 | return -2; | |
1bf4e2d9 NB |
1136 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); |
1137 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
34163fc7 NB |
1138 | memset(buf, 0xff, sizeof(buf)); |
1139 | while (towrite > 0) { | |
1140 | n = towrite; | |
1141 | if (n > sizeof(buf)) | |
1142 | n = sizeof(buf); | |
1143 | n = write(fd, buf, n); | |
1144 | if (n > 0) | |
1145 | towrite -= n; | |
1146 | else | |
1147 | break; | |
1148 | } | |
1149 | fsync(fd); | |
1150 | if (towrite) | |
1151 | rv = -2; | |
1152 | ||
1153 | return rv; | |
82d9eba6 NB |
1154 | } |
1155 | ||
1156 | struct superswitch super1 = { | |
c7654afc | 1157 | #ifndef MDASSEMBLE |
82d9eba6 NB |
1158 | .examine_super = examine_super1, |
1159 | .brief_examine_super = brief_examine_super1, | |
1160 | .detail_super = detail_super1, | |
1161 | .brief_detail_super = brief_detail_super1, | |
c7654afc | 1162 | #endif |
82d9eba6 NB |
1163 | .uuid_from_super = uuid_from_super1, |
1164 | .getinfo_super = getinfo_super1, | |
1165 | .update_super = update_super1, | |
1166 | .event_super = event_super1, | |
1167 | .init_super = init_super1, | |
1168 | .add_to_super = add_to_super1, | |
1169 | .store_super = store_super1, | |
1170 | .write_init_super = write_init_super1, | |
1171 | .compare_super = compare_super1, | |
1172 | .load_super = load_super1, | |
1173 | .match_metadata_desc = match_metadata_desc1, | |
1174 | .avail_size = avail_size1, | |
34163fc7 NB |
1175 | .add_internal_bitmap = add_internal_bitmap1, |
1176 | .locate_bitmap = locate_bitmap1, | |
1177 | .write_bitmap = write_bitmap1, | |
82d9eba6 | 1178 | .major = 1, |
f277ce36 NB |
1179 | #if __BYTE_ORDER == BIG_ENDIAN |
1180 | .swapuuid = 0, | |
1181 | #else | |
1182 | .swapuuid = 1, | |
1183 | #endif | |
82d9eba6 | 1184 | }; |