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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" | |
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' */ | |
61 | __u64 reshape_position; /* next address in array-space for reshape */ | |
62 | __u32 new_level; /* new level we are reshaping to */ | |
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) { | |
221 | printf(" New Layout : near=%d, far=%d\n", | |
222 | __le32_to_cpu(sb->new_layout)&255, | |
223 | (__le32_to_cpu(sb->new_layout)>>8)&255); | |
224 | } | |
225 | } | |
226 | if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) | |
227 | printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); | |
228 | printf("\n"); | |
229 | } | |
dfd4d8ee NB |
230 | if (sb->devflags) { |
231 | printf(" Flags :"); | |
34163fc7 | 232 | if (sb->devflags & WriteMostly1) |
dfd4d8ee NB |
233 | printf(" write-mostly"); |
234 | printf("\n"); | |
235 | } | |
82d9eba6 NB |
236 | |
237 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
238 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
239 | ||
240 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
241 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
242 | else | |
243 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
244 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
570c0542 | 245 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
246 | printf("\n"); |
247 | if (__le32_to_cpu(sb->level) == 5) { | |
248 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
249 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
250 | } | |
265e0f17 NB |
251 | if (__le32_to_cpu(sb->level) == 10) { |
252 | int lo = __le32_to_cpu(sb->layout); | |
253 | printf(" Layout : near=%d, far=%d\n", | |
254 | lo&255, (lo>>8)&255); | |
255 | } | |
82d9eba6 NB |
256 | switch(__le32_to_cpu(sb->level)) { |
257 | case 0: | |
258 | case 4: | |
259 | case 5: | |
d2cd3ffc NB |
260 | case 6: |
261 | case 10: | |
b674b5b8 | 262 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); |
82d9eba6 NB |
263 | break; |
264 | case -1: | |
b674b5b8 | 265 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); |
82d9eba6 NB |
266 | break; |
267 | default: break; | |
268 | } | |
269 | printf("\n"); | |
270 | printf(" Array State : "); | |
271 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
272 | int cnt = 0; | |
273 | int me = 0; | |
274 | int i; | |
275 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
276 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
277 | if (role == d) { | |
278 | if (i == __le32_to_cpu(sb->dev_number)) | |
279 | me = 1; | |
280 | cnt++; | |
281 | } | |
282 | } | |
283 | if (cnt > 1) printf("?"); | |
284 | else if (cnt == 1 && me) printf("U"); | |
285 | else if (cnt == 1) printf("u"); | |
286 | else printf ("_"); | |
287 | } | |
6fbba4c9 | 288 | faulty = 0; |
82d9eba6 NB |
289 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
290 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
6fbba4c9 NB |
291 | if (role == 0xFFFE) |
292 | faulty++; | |
82d9eba6 | 293 | } |
82d9eba6 NB |
294 | if (faulty) printf(" %d failed", faulty); |
295 | printf("\n"); | |
296 | } | |
297 | ||
298 | ||
299 | static void brief_examine_super1(void *sbv) | |
300 | { | |
301 | struct mdp_superblock_1 *sb = sbv; | |
302 | int i; | |
303 | ||
304 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
305 | ||
306 | printf("ARRAY /dev/?? level=%s metadata=1 num-devices=%d UUID=", | |
307 | c?c:"-unknown-", sb->raid_disks); | |
308 | for (i=0; i<16; i++) { | |
309 | printf("%02x", sb->set_uuid[i]); | |
310 | if ((i&3)==0 && i != 0) printf(":"); | |
311 | } | |
947fd4dd NB |
312 | if (sb->set_name[0]) |
313 | printf(" name=%.32s", sb->set_name); | |
82d9eba6 NB |
314 | printf("\n"); |
315 | } | |
316 | ||
317 | static void detail_super1(void *sbv) | |
318 | { | |
319 | struct mdp_superblock_1 *sb = sbv; | |
320 | int i; | |
321 | ||
947fd4dd | 322 | printf(" Name : %.32s\n", sb->set_name); |
82d9eba6 NB |
323 | printf(" UUID : "); |
324 | for (i=0; i<16; i++) { | |
82d9eba6 | 325 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 326 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 | 327 | } |
570c0542 | 328 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
329 | } |
330 | ||
331 | static void brief_detail_super1(void *sbv) | |
332 | { | |
333 | struct mdp_superblock_1 *sb = sbv; | |
334 | int i; | |
335 | ||
947fd4dd NB |
336 | if (sb->set_name[0]) |
337 | printf(" name=%.32s", sb->set_name); | |
82d9eba6 NB |
338 | printf(" UUID="); |
339 | for (i=0; i<16; i++) { | |
82d9eba6 | 340 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 341 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 NB |
342 | } |
343 | } | |
344 | ||
c7654afc NB |
345 | #endif |
346 | ||
82d9eba6 NB |
347 | static void uuid_from_super1(int uuid[4], void * sbv) |
348 | { | |
349 | struct mdp_superblock_1 *super = sbv; | |
350 | char *cuuid = (char*)uuid; | |
351 | int i; | |
352 | for (i=0; i<16; i++) | |
353 | cuuid[i] = super->set_uuid[i]; | |
354 | } | |
355 | ||
31317663 | 356 | static void getinfo_super1(struct mdinfo *info, void *sbv) |
82d9eba6 NB |
357 | { |
358 | struct mdp_superblock_1 *sb = sbv; | |
359 | int working = 0; | |
360 | int i; | |
361 | int role; | |
362 | ||
363 | info->array.major_version = 1; | |
364 | info->array.minor_version = __le32_to_cpu(sb->feature_map); | |
365 | info->array.patch_version = 0; | |
366 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
367 | info->array.level = __le32_to_cpu(sb->level); | |
265e0f17 | 368 | info->array.layout = __le32_to_cpu(sb->layout); |
82d9eba6 NB |
369 | info->array.md_minor = -1; |
370 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
353632d9 NB |
371 | info->array.utime = __le64_to_cpu(sb->utime); |
372 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)/512; | |
373 | ||
374 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
375 | info->component_size = __le64_to_cpu(sb->size); | |
82d9eba6 NB |
376 | |
377 | info->disk.major = 0; | |
378 | info->disk.minor = 0; | |
fbf8a0b7 | 379 | info->disk.number = __le32_to_cpu(sb->dev_number); |
82d9eba6 NB |
380 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || |
381 | __le32_to_cpu(sb->max_dev) > 512) | |
382 | role = 0xfffe; | |
383 | else | |
384 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
385 | ||
386 | info->disk.raid_disk = -1; | |
387 | switch(role) { | |
388 | case 0xFFFF: | |
389 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
390 | break; | |
391 | case 0xFFFE: | |
392 | info->disk.state = 1; /* faulty */ | |
393 | break; | |
394 | default: | |
395 | info->disk.state = 6; /* active and in sync */ | |
396 | info->disk.raid_disk = role; | |
397 | } | |
398 | info->events = __le64_to_cpu(sb->events); | |
399 | ||
400 | memcpy(info->uuid, sb->set_uuid, 16); | |
401 | ||
31317663 NB |
402 | strncpy(info->name, sb->set_name, 32); |
403 | info->name[32] = 0; | |
947fd4dd | 404 | |
353632d9 NB |
405 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { |
406 | info->reshape_active = 1; | |
407 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
408 | info->new_level = __le32_to_cpu(sb->new_level); | |
409 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
410 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
411 | info->new_chunk = __le32_to_cpu(sb->new_chunk); | |
412 | } else | |
413 | info->reshape_active = 0; | |
414 | ||
82d9eba6 NB |
415 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
416 | role = __le16_to_cpu(sb->dev_roles[i]); | |
fbf8a0b7 | 417 | if (/*role == 0xFFFF || */role < info->array.raid_disks) |
82d9eba6 NB |
418 | working++; |
419 | } | |
420 | ||
421 | info->array.working_disks = working; | |
422 | } | |
423 | ||
424 | static int update_super1(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose) | |
425 | { | |
426 | int rv = 0; | |
427 | struct mdp_superblock_1 *sb = sbv; | |
428 | ||
429 | if (strcmp(update, "force")==0) { | |
6d3d5804 | 430 | sb->events = __cpu_to_le64(info->events); |
82d9eba6 NB |
431 | switch(__le32_to_cpu(sb->level)) { |
432 | case 5: case 4: case 6: | |
433 | /* need to force clean */ | |
434 | sb->resync_offset = ~0ULL; | |
435 | } | |
436 | } | |
437 | if (strcmp(update, "assemble")==0) { | |
438 | int d = info->disk.number; | |
439 | int want; | |
440 | if (info->disk.state == 6) | |
441 | want = __cpu_to_le32(info->disk.raid_disk); | |
442 | else | |
443 | want = 0xFFFF; | |
444 | if (sb->dev_roles[d] != want) { | |
445 | sb->dev_roles[d] = want; | |
446 | rv = 1; | |
447 | } | |
448 | } | |
449 | #if 0 | |
450 | if (strcmp(update, "newdev") == 0) { | |
451 | int d = info->disk.number; | |
452 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
453 | sb->disks[d].number = d; | |
454 | sb->disks[d].major = info->disk.major; | |
455 | sb->disks[d].minor = info->disk.minor; | |
456 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
457 | sb->disks[d].state = info->disk.state; | |
458 | sb->this_disk = sb->disks[d]; | |
459 | } | |
460 | #endif | |
461 | if (strcmp(update, "grow") == 0) { | |
462 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
463 | /* FIXME */ | |
464 | } | |
465 | if (strcmp(update, "resync") == 0) { | |
466 | /* make sure resync happens */ | |
467 | sb->resync_offset = ~0ULL; | |
468 | } | |
7d99579f | 469 | if (strcmp(update, "uuid") == 0) |
838acbc2 | 470 | memcpy(sb->set_uuid, info->uuid, 16); |
353632d9 NB |
471 | if (strcmp(update, "_reshape_progress")==0) |
472 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
82d9eba6 NB |
473 | |
474 | sb->sb_csum = calc_sb_1_csum(sb); | |
475 | return rv; | |
476 | } | |
477 | ||
478 | ||
479 | static __u64 event_super1(void *sbv) | |
480 | { | |
481 | struct mdp_superblock_1 *sb = sbv; | |
482 | return __le64_to_cpu(sb->events); | |
483 | } | |
484 | ||
5dd497ee | 485 | static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name) |
82d9eba6 | 486 | { |
34163fc7 | 487 | struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t)); |
82d9eba6 | 488 | int spares; |
34163fc7 | 489 | int rfd; |
82d9eba6 NB |
490 | memset(sb, 0, 1024); |
491 | ||
492 | if (info->major_version == -1) | |
493 | /* zeroing superblock */ | |
494 | return 0; | |
495 | ||
496 | spares = info->working_disks - info->active_disks; | |
497 | if (info->raid_disks + spares > 384) { | |
498 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
499 | info->raid_disks , spares, 384); | |
500 | return 0; | |
501 | } | |
502 | ||
503 | ||
504 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
505 | sb->major_version = __cpu_to_le32(1); | |
506 | sb->feature_map = 0; | |
507 | sb->pad0 = 0; | |
34163fc7 NB |
508 | |
509 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
510 | read(rfd, sb->set_uuid, 16) != 16) { | |
511 | *(__u32*)(sb->set_uuid) = random(); | |
512 | *(__u32*)(sb->set_uuid+4) = random(); | |
513 | *(__u32*)(sb->set_uuid+8) = random(); | |
514 | *(__u32*)(sb->set_uuid+12) = random(); | |
515 | } | |
516 | if (rfd >= 0) close(rfd); | |
82d9eba6 | 517 | |
947fd4dd NB |
518 | memset(sb->set_name, 0, 32); |
519 | strcpy(sb->set_name, name); | |
82d9eba6 NB |
520 | |
521 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
522 | sb->level = __cpu_to_le32(info->level); | |
ea329559 | 523 | sb->layout = __cpu_to_le32(info->layout); |
5dd497ee | 524 | sb->size = __cpu_to_le64(size*2ULL); |
82d9eba6 NB |
525 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); |
526 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
527 | ||
528 | sb->data_offset = __cpu_to_le64(0); | |
529 | sb->data_size = __cpu_to_le64(0); | |
530 | sb->super_offset = __cpu_to_le64(0); | |
531 | sb->recovery_offset = __cpu_to_le64(0); | |
532 | ||
533 | sb->utime = sb->ctime; | |
534 | sb->events = __cpu_to_le64(1); | |
34321279 | 535 | if (info->state & (1<<MD_SB_CLEAN)) |
82d9eba6 NB |
536 | sb->resync_offset = ~0ULL; |
537 | else | |
538 | sb->resync_offset = 0; | |
34163fc7 | 539 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ |
82d9eba6 NB |
540 | sizeof(sb->dev_roles[0])); |
541 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
542 | ||
543 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
544 | ||
545 | *sbp = sb; | |
546 | return 1; | |
547 | } | |
548 | ||
549 | /* Add a device to the superblock being created */ | |
550 | static void add_to_super1(void *sbv, mdu_disk_info_t *dk) | |
551 | { | |
552 | struct mdp_superblock_1 *sb = sbv; | |
553 | __u16 *rp = sb->dev_roles + dk->number; | |
dfd4d8ee | 554 | if ((dk->state & 6) == 6) /* active, sync */ |
82d9eba6 | 555 | *rp = __cpu_to_le16(dk->raid_disk); |
412ca2e5 | 556 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ |
82d9eba6 | 557 | *rp = 0xffff; |
34163fc7 | 558 | else |
82d9eba6 NB |
559 | *rp = 0xfffe; |
560 | } | |
561 | ||
96395475 | 562 | static int store_super1(struct supertype *st, int fd, void *sbv) |
82d9eba6 NB |
563 | { |
564 | struct mdp_superblock_1 *sb = sbv; | |
6fbba4c9 | 565 | unsigned long long sb_offset; |
82d9eba6 | 566 | int sbsize; |
5dd497ee NB |
567 | unsigned long size; |
568 | unsigned long long dsize; | |
96395475 | 569 | |
5dd497ee NB |
570 | #ifdef BLKGETSIZE64 |
571 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
572 | #endif | |
573 | { | |
574 | if (ioctl(fd, BLKGETSIZE, &size)) | |
575 | return 1; | |
576 | else | |
577 | dsize = (unsigned long long)size; | |
578 | } else | |
579 | dsize >>= 9; | |
96395475 | 580 | |
5dd497ee | 581 | if (dsize < 24) |
96395475 NB |
582 | return 2; |
583 | ||
584 | /* | |
585 | * Calculate the position of the superblock. | |
586 | * It is always aligned to a 4K boundary and | |
587 | * depending on minor_version, it can be: | |
588 | * 0: At least 8K, but less than 12K, from end of device | |
589 | * 1: At start of device | |
590 | * 2: 4K from start of device. | |
591 | */ | |
592 | switch(st->minor_version) { | |
593 | case 0: | |
5dd497ee | 594 | sb_offset = dsize; |
96395475 NB |
595 | sb_offset -= 8*2; |
596 | sb_offset &= ~(4*2-1); | |
597 | break; | |
598 | case 1: | |
6fbba4c9 | 599 | sb_offset = 0; |
96395475 NB |
600 | break; |
601 | case 2: | |
602 | sb_offset = 4*2; | |
603 | break; | |
604 | default: | |
605 | return -EINVAL; | |
606 | } | |
607 | ||
82d9eba6 | 608 | |
34163fc7 | 609 | |
6fbba4c9 NB |
610 | if (sb_offset != __le64_to_cpu(sb->super_offset) && |
611 | 0 != __le64_to_cpu(sb->super_offset) | |
96395475 NB |
612 | ) { |
613 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
614 | abort(); | |
615 | } | |
82d9eba6 | 616 | |
6fbba4c9 | 617 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) |
82d9eba6 NB |
618 | return 3; |
619 | ||
620 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
621 | ||
622 | if (write(fd, sb, sbsize) != sbsize) | |
623 | return 4; | |
624 | ||
570c0542 | 625 | fsync(fd); |
82d9eba6 NB |
626 | return 0; |
627 | } | |
628 | ||
892debc8 NB |
629 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname); |
630 | ||
34163fc7 | 631 | static int write_init_super1(struct supertype *st, void *sbv, |
1bf4e2d9 | 632 | mdu_disk_info_t *dinfo, char *devname) |
82d9eba6 NB |
633 | { |
634 | struct mdp_superblock_1 *sb = sbv; | |
e478dc86 | 635 | void *refsbv = NULL; |
892debc8 | 636 | int fd = open(devname, O_RDWR | O_EXCL); |
dfe47e00 | 637 | int rfd; |
82d9eba6 NB |
638 | int rv; |
639 | ||
8fac0577 NB |
640 | unsigned long size, space; |
641 | unsigned long long dsize, array_size; | |
82d9eba6 NB |
642 | long long sb_offset; |
643 | ||
644 | ||
645 | if (fd < 0) { | |
646 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", | |
647 | devname); | |
648 | return -1; | |
649 | } | |
650 | ||
651 | sb->dev_number = __cpu_to_le32(dinfo->number); | |
34163fc7 | 652 | if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY)) |
dfd4d8ee | 653 | sb->devflags |= WriteMostly1; |
892debc8 | 654 | |
dfe47e00 NB |
655 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
656 | read(rfd, sb->device_uuid, 16) != 16) { | |
657 | *(__u32*)(sb->device_uuid) = random(); | |
658 | *(__u32*)(sb->device_uuid+4) = random(); | |
659 | *(__u32*)(sb->device_uuid+8) = random(); | |
660 | *(__u32*)(sb->device_uuid+12) = random(); | |
661 | } | |
662 | if (rfd >= 0) close(rfd); | |
892debc8 NB |
663 | sb->events = 0; |
664 | ||
e478dc86 NB |
665 | if (load_super1(st, fd, &refsbv, NULL)==0) { |
666 | struct mdp_superblock_1 *refsb = refsbv; | |
667 | ||
892debc8 NB |
668 | memcpy(sb->device_uuid, refsb->device_uuid, 16); |
669 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
670 | /* same array, so preserve events and dev_number */ | |
671 | sb->events = refsb->events; | |
672 | sb->dev_number = refsb->dev_number; | |
673 | } | |
674 | free(refsb); | |
675 | } | |
34163fc7 | 676 | |
5dd497ee NB |
677 | #ifdef BLKGETSIZE64 |
678 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
679 | #endif | |
680 | { | |
681 | if (ioctl(fd, BLKGETSIZE, &size)) | |
682 | return 1; | |
683 | else | |
684 | dsize = size; | |
685 | } else | |
686 | dsize >>= 9; | |
82d9eba6 | 687 | |
5dd497ee | 688 | if (dsize < 24) { |
024ce7fe | 689 | close(fd); |
82d9eba6 | 690 | return 2; |
024ce7fe | 691 | } |
82d9eba6 NB |
692 | |
693 | ||
694 | /* | |
695 | * Calculate the position of the superblock. | |
696 | * It is always aligned to a 4K boundary and | |
697 | * depending on minor_version, it can be: | |
698 | * 0: At least 8K, but less than 12K, from end of device | |
699 | * 1: At start of device | |
700 | * 2: 4K from start of device. | |
21e92547 NB |
701 | * Depending on the array size, we might leave extra space |
702 | * for a bitmap. | |
82d9eba6 | 703 | */ |
8fac0577 | 704 | array_size = __le64_to_cpu(sb->size); |
82d9eba6 NB |
705 | switch(st->minor_version) { |
706 | case 0: | |
5dd497ee | 707 | sb_offset = dsize; |
82d9eba6 NB |
708 | sb_offset -= 8*2; |
709 | sb_offset &= ~(4*2-1); | |
710 | sb->super_offset = __cpu_to_le64(sb_offset); | |
711 | sb->data_offset = __cpu_to_le64(0); | |
561832f9 | 712 | if (sb_offset-64*2 >= array_size && array_size > 8*1024*1024*2) |
21e92547 NB |
713 | sb->data_size = __cpu_to_le64(sb_offset-64*2); |
714 | else | |
715 | sb->data_size = __cpu_to_le64(sb_offset); | |
82d9eba6 NB |
716 | break; |
717 | case 1: | |
718 | sb->super_offset = __cpu_to_le64(0); | |
561832f9 | 719 | if (dsize - 64*2 >= array_size && array_size > 8*1024*1024*2) |
21e92547 NB |
720 | space = 64*2; |
721 | else | |
722 | space = 4*2; | |
723 | sb->data_offset = __cpu_to_le64(space); /* leave space for super and bitmap */ | |
724 | sb->data_size = __cpu_to_le64(dsize - space); | |
82d9eba6 NB |
725 | break; |
726 | case 2: | |
727 | sb_offset = 4*2; | |
561832f9 | 728 | if (dsize - 4*2 - 64*2 >= array_size && array_size > 8*1024*1024*2) |
21e92547 NB |
729 | space = 64*2; |
730 | else | |
731 | space = 4*2; | |
82d9eba6 | 732 | sb->super_offset = __cpu_to_le64(sb_offset); |
21e92547 NB |
733 | sb->data_offset = __cpu_to_le64(sb_offset+space); |
734 | sb->data_size = __cpu_to_le64(dsize - 4*2 - space); | |
82d9eba6 NB |
735 | break; |
736 | default: | |
737 | return -EINVAL; | |
738 | } | |
739 | ||
740 | ||
741 | sb->sb_csum = calc_sb_1_csum(sb); | |
96395475 | 742 | rv = store_super1(st, fd, sb); |
82d9eba6 NB |
743 | if (rv) |
744 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
34163fc7 | 745 | |
1bf4e2d9 NB |
746 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) |
747 | rv = st->ss->write_bitmap(st, fd, sbv); | |
024ce7fe | 748 | close(fd); |
82d9eba6 NB |
749 | return rv; |
750 | } | |
751 | ||
752 | static int compare_super1(void **firstp, void *secondv) | |
753 | { | |
754 | /* | |
755 | * return: | |
756 | * 0 same, or first was empty, and second was copied | |
757 | * 1 second had wrong number | |
758 | * 2 wrong uuid | |
759 | * 3 wrong other info | |
760 | */ | |
761 | struct mdp_superblock_1 *first = *firstp; | |
762 | struct mdp_superblock_1 *second = secondv; | |
763 | ||
764 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
765 | return 1; | |
766 | if (second->major_version != __cpu_to_le32(1)) | |
767 | return 1; | |
768 | ||
769 | if (!first) { | |
770 | first = malloc(1024); | |
771 | memcpy(first, second, 1024); | |
772 | *firstp = first; | |
773 | return 0; | |
774 | } | |
775 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
776 | return 2; | |
777 | ||
778 | if (first->ctime != second->ctime || | |
779 | first->level != second->level || | |
780 | first->layout != second->layout || | |
781 | first->size != second->size || | |
782 | first->chunksize != second->chunksize || | |
783 | first->raid_disks != second->raid_disks) | |
784 | return 3; | |
785 | return 0; | |
786 | } | |
787 | ||
788 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname) | |
789 | { | |
790 | unsigned long size; | |
5dd497ee | 791 | unsigned long long dsize; |
82d9eba6 NB |
792 | unsigned long long sb_offset; |
793 | struct mdp_superblock_1 *super; | |
794 | ||
795 | ||
796 | ||
797 | if (st->ss == NULL) { | |
570c0542 NB |
798 | int bestvers = -1; |
799 | __u64 bestctime = 0; | |
800 | /* guess... choose latest ctime */ | |
82d9eba6 NB |
801 | st->ss = &super1; |
802 | for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) { | |
803 | switch(load_super1(st, fd, sbp, devname)) { | |
570c0542 NB |
804 | case 0: super = *sbp; |
805 | if (bestvers == -1 || | |
806 | bestctime < __le64_to_cpu(super->ctime)) { | |
807 | bestvers = st->minor_version; | |
808 | bestctime = __le64_to_cpu(super->ctime); | |
809 | } | |
810 | free(super); | |
811 | *sbp = NULL; | |
812 | break; | |
82d9eba6 NB |
813 | case 1: st->ss = NULL; return 1; /*bad device */ |
814 | case 2: break; /* bad, try next */ | |
815 | } | |
816 | } | |
570c0542 NB |
817 | if (bestvers != -1) { |
818 | int rv; | |
819 | st->minor_version = bestvers; | |
820 | st->ss = &super1; | |
ea329559 | 821 | st->max_devs = 384; |
570c0542 NB |
822 | rv = load_super1(st, fd, sbp, devname); |
823 | if (rv) st->ss = NULL; | |
824 | return rv; | |
825 | } | |
82d9eba6 NB |
826 | st->ss = NULL; |
827 | return 2; | |
828 | } | |
5dd497ee NB |
829 | #ifdef BLKGETSIZE64 |
830 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
831 | #endif | |
832 | { | |
833 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
834 | if (devname) | |
835 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
836 | devname, strerror(errno)); | |
837 | return 1; | |
838 | } | |
839 | dsize = size; | |
840 | } else | |
841 | dsize >>= 9; | |
82d9eba6 | 842 | |
5dd497ee | 843 | if (dsize < 24) { |
82d9eba6 | 844 | if (devname) |
5dd497ee NB |
845 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", |
846 | devname, dsize); | |
82d9eba6 NB |
847 | return 1; |
848 | } | |
849 | ||
850 | /* | |
851 | * Calculate the position of the superblock. | |
852 | * It is always aligned to a 4K boundary and | |
853 | * depeding on minor_version, it can be: | |
854 | * 0: At least 8K, but less than 12K, from end of device | |
855 | * 1: At start of device | |
856 | * 2: 4K from start of device. | |
857 | */ | |
858 | switch(st->minor_version) { | |
859 | case 0: | |
5dd497ee | 860 | sb_offset = dsize; |
82d9eba6 NB |
861 | sb_offset -= 8*2; |
862 | sb_offset &= ~(4*2-1); | |
863 | break; | |
864 | case 1: | |
865 | sb_offset = 0; | |
866 | break; | |
867 | case 2: | |
868 | sb_offset = 4*2; | |
869 | break; | |
870 | default: | |
871 | return -EINVAL; | |
872 | } | |
873 | ||
874 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
875 | ||
876 | ||
877 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
878 | if (devname) | |
879 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
880 | devname, strerror(errno)); | |
881 | return 1; | |
882 | } | |
883 | ||
34163fc7 | 884 | super = malloc(1024 + sizeof(bitmap_super_t)); |
82d9eba6 NB |
885 | |
886 | if (read(fd, super, 1024) != 1024) { | |
887 | if (devname) | |
888 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
889 | devname); | |
890 | free(super); | |
891 | return 1; | |
892 | } | |
893 | ||
894 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
895 | if (devname) | |
896 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
897 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
898 | free(super); | |
899 | return 2; | |
900 | } | |
901 | ||
902 | if (__le32_to_cpu(super->major_version) != 1) { | |
903 | if (devname) | |
904 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
905 | devname, __le32_to_cpu(super->major_version)); | |
906 | free(super); | |
907 | return 2; | |
908 | } | |
909 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
910 | if (devname) | |
911 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
912 | devname); | |
913 | free(super); | |
914 | return 2; | |
915 | } | |
916 | *sbp = super; | |
917 | return 0; | |
918 | } | |
919 | ||
920 | ||
921 | static struct supertype *match_metadata_desc1(char *arg) | |
922 | { | |
923 | struct supertype *st = malloc(sizeof(*st)); | |
924 | if (!st) return st; | |
925 | ||
926 | st->ss = &super1; | |
ea329559 | 927 | st->max_devs = 384; |
82d9eba6 | 928 | if (strcmp(arg, "1") == 0 || |
576d6d83 NB |
929 | strcmp(arg, "1.0") == 0 || |
930 | strcmp(arg, "default/large") == 0) { | |
82d9eba6 NB |
931 | st->minor_version = 0; |
932 | return st; | |
933 | } | |
934 | if (strcmp(arg, "1.1") == 0) { | |
935 | st->minor_version = 1; | |
936 | return st; | |
937 | } | |
938 | if (strcmp(arg, "1.2") == 0) { | |
939 | st->minor_version = 2; | |
940 | return st; | |
941 | } | |
942 | ||
943 | free(st); | |
944 | return NULL; | |
945 | } | |
946 | ||
34163fc7 NB |
947 | /* find available size on device with this devsize, using |
948 | * superblock type st, and reserving 'reserve' sectors for | |
949 | * a possible bitmap | |
950 | */ | |
1bf4e2d9 | 951 | static __u64 avail_size1(struct supertype *st, __u64 devsize) |
82d9eba6 NB |
952 | { |
953 | if (devsize < 24) | |
954 | return 0; | |
955 | ||
21e92547 NB |
956 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, |
957 | * if biffer than 200Gig, save 128k | |
958 | */ | |
959 | if (devsize > 200*1024*1024*2) | |
960 | devsize -= 128*2; | |
961 | else if (devsize > 8*1024*1024*2) | |
962 | devsize -= 64*2; | |
963 | ||
34163fc7 NB |
964 | switch(st->minor_version) { |
965 | case 0: | |
1bf4e2d9 NB |
966 | /* at end */ |
967 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
34163fc7 | 968 | case 1: |
1bf4e2d9 NB |
969 | /* at start, 4K for superblock and possible bitmap */ |
970 | return devsize - 4*2; | |
34163fc7 | 971 | case 2: |
1bf4e2d9 NB |
972 | /* 4k from start, 4K for superblock and possible bitmap */ |
973 | return devsize - (4+4)*2; | |
34163fc7 NB |
974 | } |
975 | return 0; | |
976 | } | |
977 | ||
1bf4e2d9 NB |
978 | static int |
979 | add_internal_bitmap1(struct supertype *st, void *sbv, | |
21e92547 NB |
980 | int chunk, int delay, int write_behind, unsigned long long size, |
981 | int may_change, int major) | |
34163fc7 NB |
982 | { |
983 | /* | |
1bf4e2d9 NB |
984 | * If not may_change, then this is a 'Grow', and the bitmap |
985 | * must fit after the superblock. | |
986 | * If may_change, then this is create, and we can put the bitmap | |
987 | * before the superblock if we like, or may move the start. | |
988 | * For now, just squeeze the bitmap into 3k and don't change anything. | |
34163fc7 | 989 | * |
f9c25f1d | 990 | * size is in sectors, chunk is in bytes !!! |
34163fc7 NB |
991 | */ |
992 | ||
1bf4e2d9 NB |
993 | unsigned long long bits; |
994 | unsigned long long max_bits = (3*512 - sizeof(bitmap_super_t)) * 8; | |
34163fc7 NB |
995 | unsigned long long min_chunk; |
996 | struct mdp_superblock_1 *sb = sbv; | |
997 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
998 | ||
1bf4e2d9 NB |
999 | if (st->minor_version && !may_change && |
1000 | __le64_to_cpu(sb->data_offset) - __le64_to_cpu(sb->super_offset) < 8) | |
1001 | return 0; /* doesn't fit */ | |
1002 | ||
1003 | ||
34163fc7 NB |
1004 | |
1005 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
f9c25f1d | 1006 | bits = (size*512)/min_chunk +1; |
34163fc7 NB |
1007 | while (bits > max_bits) { |
1008 | min_chunk *= 2; | |
1009 | bits = (bits+1)/2; | |
1010 | } | |
1011 | if (chunk == UnSet) | |
1012 | chunk = min_chunk; | |
1013 | else if (chunk < min_chunk) | |
1014 | return 0; /* chunk size too small */ | |
21e92547 NB |
1015 | if (chunk == 0) /* rounding problem */ |
1016 | return 0; | |
34163fc7 | 1017 | |
1bf4e2d9 | 1018 | sb->bitmap_offset = __cpu_to_le32(2); |
34163fc7 NB |
1019 | |
1020 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
29e766a5 | 1021 | memset(bms, 0, sizeof(*bms)); |
34163fc7 | 1022 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
dcec9ee5 | 1023 | bms->version = __cpu_to_le32(major); |
34163fc7 NB |
1024 | uuid_from_super1((int*)bms->uuid, sb); |
1025 | bms->chunksize = __cpu_to_le32(chunk); | |
1026 | bms->daemon_sleep = __cpu_to_le32(delay); | |
f9c25f1d | 1027 | bms->sync_size = __cpu_to_le64(size); |
34163fc7 NB |
1028 | bms->write_behind = __cpu_to_le32(write_behind); |
1029 | ||
34163fc7 NB |
1030 | return 1; |
1031 | } | |
1032 | ||
1033 | ||
f6d75de8 | 1034 | void locate_bitmap1(struct supertype *st, int fd, void *sbv) |
34163fc7 | 1035 | { |
34163fc7 | 1036 | unsigned long long offset; |
1e0d770c NB |
1037 | struct mdp_superblock_1 *sb; |
1038 | int mustfree = 0; | |
34163fc7 | 1039 | |
1e0d770c NB |
1040 | if (!sbv) { |
1041 | if (st->ss->load_super(st, fd, &sbv, NULL)) | |
f6d75de8 | 1042 | return; /* no error I hope... */ |
1e0d770c NB |
1043 | mustfree = 1; |
1044 | } | |
1045 | sb = sbv; | |
e478dc86 | 1046 | |
1bf4e2d9 NB |
1047 | offset = __le64_to_cpu(sb->super_offset); |
1048 | offset += (long) __le32_to_cpu(sb->bitmap_offset); | |
1e0d770c | 1049 | if (mustfree) |
f6d75de8 | 1050 | free(sb); |
1bf4e2d9 | 1051 | lseek64(fd, offset<<9, 0); |
34163fc7 NB |
1052 | } |
1053 | ||
1054 | int write_bitmap1(struct supertype *st, int fd, void *sbv) | |
1055 | { | |
1056 | struct mdp_superblock_1 *sb = sbv; | |
1bf4e2d9 | 1057 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); |
34163fc7 NB |
1058 | int rv = 0; |
1059 | ||
1060 | int towrite, n; | |
1061 | char buf[4096]; | |
1062 | ||
f6d75de8 | 1063 | locate_bitmap1(st, fd, sbv); |
34163fc7 | 1064 | |
1e0d770c NB |
1065 | if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) != |
1066 | sizeof(bitmap_super_t)) | |
1067 | return -2; | |
1bf4e2d9 NB |
1068 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); |
1069 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
34163fc7 NB |
1070 | memset(buf, 0xff, sizeof(buf)); |
1071 | while (towrite > 0) { | |
1072 | n = towrite; | |
1073 | if (n > sizeof(buf)) | |
1074 | n = sizeof(buf); | |
1075 | n = write(fd, buf, n); | |
1076 | if (n > 0) | |
1077 | towrite -= n; | |
1078 | else | |
1079 | break; | |
1080 | } | |
1081 | fsync(fd); | |
1082 | if (towrite) | |
1083 | rv = -2; | |
1084 | ||
1085 | return rv; | |
82d9eba6 NB |
1086 | } |
1087 | ||
1088 | struct superswitch super1 = { | |
c7654afc | 1089 | #ifndef MDASSEMBLE |
82d9eba6 NB |
1090 | .examine_super = examine_super1, |
1091 | .brief_examine_super = brief_examine_super1, | |
1092 | .detail_super = detail_super1, | |
1093 | .brief_detail_super = brief_detail_super1, | |
c7654afc | 1094 | #endif |
82d9eba6 NB |
1095 | .uuid_from_super = uuid_from_super1, |
1096 | .getinfo_super = getinfo_super1, | |
1097 | .update_super = update_super1, | |
1098 | .event_super = event_super1, | |
1099 | .init_super = init_super1, | |
1100 | .add_to_super = add_to_super1, | |
1101 | .store_super = store_super1, | |
1102 | .write_init_super = write_init_super1, | |
1103 | .compare_super = compare_super1, | |
1104 | .load_super = load_super1, | |
1105 | .match_metadata_desc = match_metadata_desc1, | |
1106 | .avail_size = avail_size1, | |
34163fc7 NB |
1107 | .add_internal_bitmap = add_internal_bitmap1, |
1108 | .locate_bitmap = locate_bitmap1, | |
1109 | .write_bitmap = write_bitmap1, | |
82d9eba6 | 1110 | .major = 1, |
f277ce36 NB |
1111 | #if __BYTE_ORDER == BIG_ENDIAN |
1112 | .swapuuid = 0, | |
1113 | #else | |
1114 | .swapuuid = 1, | |
1115 | #endif | |
82d9eba6 | 1116 | }; |