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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' */ | |
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 | ||
320 | static void detail_super1(void *sbv) | |
321 | { | |
322 | struct mdp_superblock_1 *sb = sbv; | |
323 | int i; | |
324 | ||
947fd4dd | 325 | printf(" Name : %.32s\n", sb->set_name); |
82d9eba6 NB |
326 | printf(" UUID : "); |
327 | for (i=0; i<16; i++) { | |
82d9eba6 | 328 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 329 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 | 330 | } |
570c0542 | 331 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
332 | } |
333 | ||
334 | static void brief_detail_super1(void *sbv) | |
335 | { | |
336 | struct mdp_superblock_1 *sb = sbv; | |
337 | int i; | |
338 | ||
947fd4dd NB |
339 | if (sb->set_name[0]) |
340 | printf(" name=%.32s", sb->set_name); | |
82d9eba6 NB |
341 | printf(" UUID="); |
342 | for (i=0; i<16; i++) { | |
82d9eba6 | 343 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 344 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 NB |
345 | } |
346 | } | |
347 | ||
c7654afc NB |
348 | #endif |
349 | ||
82d9eba6 NB |
350 | static void uuid_from_super1(int uuid[4], void * sbv) |
351 | { | |
352 | struct mdp_superblock_1 *super = sbv; | |
353 | char *cuuid = (char*)uuid; | |
354 | int i; | |
355 | for (i=0; i<16; i++) | |
356 | cuuid[i] = super->set_uuid[i]; | |
357 | } | |
358 | ||
31317663 | 359 | static void getinfo_super1(struct mdinfo *info, void *sbv) |
82d9eba6 NB |
360 | { |
361 | struct mdp_superblock_1 *sb = sbv; | |
362 | int working = 0; | |
363 | int i; | |
364 | int role; | |
365 | ||
366 | info->array.major_version = 1; | |
367 | info->array.minor_version = __le32_to_cpu(sb->feature_map); | |
368 | info->array.patch_version = 0; | |
369 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
370 | info->array.level = __le32_to_cpu(sb->level); | |
265e0f17 | 371 | info->array.layout = __le32_to_cpu(sb->layout); |
82d9eba6 NB |
372 | info->array.md_minor = -1; |
373 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
353632d9 | 374 | info->array.utime = __le64_to_cpu(sb->utime); |
bed256c2 | 375 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; |
353632d9 NB |
376 | |
377 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
378 | info->component_size = __le64_to_cpu(sb->size); | |
82d9eba6 NB |
379 | |
380 | info->disk.major = 0; | |
381 | info->disk.minor = 0; | |
fbf8a0b7 | 382 | info->disk.number = __le32_to_cpu(sb->dev_number); |
82d9eba6 NB |
383 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || |
384 | __le32_to_cpu(sb->max_dev) > 512) | |
385 | role = 0xfffe; | |
386 | else | |
387 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
388 | ||
389 | info->disk.raid_disk = -1; | |
390 | switch(role) { | |
391 | case 0xFFFF: | |
392 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
393 | break; | |
394 | case 0xFFFE: | |
395 | info->disk.state = 1; /* faulty */ | |
396 | break; | |
397 | default: | |
398 | info->disk.state = 6; /* active and in sync */ | |
399 | info->disk.raid_disk = role; | |
400 | } | |
401 | info->events = __le64_to_cpu(sb->events); | |
402 | ||
403 | memcpy(info->uuid, sb->set_uuid, 16); | |
404 | ||
31317663 NB |
405 | strncpy(info->name, sb->set_name, 32); |
406 | info->name[32] = 0; | |
947fd4dd | 407 | |
353632d9 NB |
408 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { |
409 | info->reshape_active = 1; | |
410 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
411 | info->new_level = __le32_to_cpu(sb->new_level); | |
412 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
413 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
bed256c2 | 414 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; |
353632d9 NB |
415 | } else |
416 | info->reshape_active = 0; | |
417 | ||
82d9eba6 NB |
418 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
419 | role = __le16_to_cpu(sb->dev_roles[i]); | |
fbf8a0b7 | 420 | if (/*role == 0xFFFF || */role < info->array.raid_disks) |
82d9eba6 NB |
421 | working++; |
422 | } | |
423 | ||
424 | info->array.working_disks = working; | |
425 | } | |
426 | ||
427 | static int update_super1(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose) | |
428 | { | |
c4d831e1 NB |
429 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. |
430 | * For others, the return value is ignored. | |
431 | */ | |
82d9eba6 NB |
432 | int rv = 0; |
433 | struct mdp_superblock_1 *sb = sbv; | |
434 | ||
435 | if (strcmp(update, "force")==0) { | |
c4d831e1 NB |
436 | if (sb->events != __cpu_to_le64(info->events)) |
437 | rv = 1; | |
6d3d5804 | 438 | sb->events = __cpu_to_le64(info->events); |
82d9eba6 NB |
439 | switch(__le32_to_cpu(sb->level)) { |
440 | case 5: case 4: case 6: | |
441 | /* need to force clean */ | |
c4d831e1 NB |
442 | if (sb->resync_offset != ~0ULL) |
443 | rv = 1; | |
82d9eba6 NB |
444 | sb->resync_offset = ~0ULL; |
445 | } | |
446 | } | |
447 | if (strcmp(update, "assemble")==0) { | |
448 | int d = info->disk.number; | |
449 | int want; | |
450 | if (info->disk.state == 6) | |
451 | want = __cpu_to_le32(info->disk.raid_disk); | |
452 | else | |
453 | want = 0xFFFF; | |
454 | if (sb->dev_roles[d] != want) { | |
455 | sb->dev_roles[d] = want; | |
456 | rv = 1; | |
457 | } | |
458 | } | |
459 | #if 0 | |
460 | if (strcmp(update, "newdev") == 0) { | |
461 | int d = info->disk.number; | |
462 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
463 | sb->disks[d].number = d; | |
464 | sb->disks[d].major = info->disk.major; | |
465 | sb->disks[d].minor = info->disk.minor; | |
466 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
467 | sb->disks[d].state = info->disk.state; | |
468 | sb->this_disk = sb->disks[d]; | |
469 | } | |
470 | #endif | |
471 | if (strcmp(update, "grow") == 0) { | |
472 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
473 | /* FIXME */ | |
474 | } | |
475 | if (strcmp(update, "resync") == 0) { | |
476 | /* make sure resync happens */ | |
477 | sb->resync_offset = ~0ULL; | |
478 | } | |
7d99579f | 479 | if (strcmp(update, "uuid") == 0) |
838acbc2 | 480 | memcpy(sb->set_uuid, info->uuid, 16); |
353632d9 NB |
481 | if (strcmp(update, "_reshape_progress")==0) |
482 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
82d9eba6 NB |
483 | |
484 | sb->sb_csum = calc_sb_1_csum(sb); | |
485 | return rv; | |
486 | } | |
487 | ||
488 | ||
489 | static __u64 event_super1(void *sbv) | |
490 | { | |
491 | struct mdp_superblock_1 *sb = sbv; | |
492 | return __le64_to_cpu(sb->events); | |
493 | } | |
494 | ||
5dd497ee | 495 | static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name) |
82d9eba6 | 496 | { |
34163fc7 | 497 | struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t)); |
82d9eba6 | 498 | int spares; |
34163fc7 | 499 | int rfd; |
82d9eba6 NB |
500 | memset(sb, 0, 1024); |
501 | ||
502 | if (info->major_version == -1) | |
503 | /* zeroing superblock */ | |
504 | return 0; | |
505 | ||
506 | spares = info->working_disks - info->active_disks; | |
507 | if (info->raid_disks + spares > 384) { | |
508 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
509 | info->raid_disks , spares, 384); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | ||
514 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
515 | sb->major_version = __cpu_to_le32(1); | |
516 | sb->feature_map = 0; | |
517 | sb->pad0 = 0; | |
34163fc7 NB |
518 | |
519 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
520 | read(rfd, sb->set_uuid, 16) != 16) { | |
521 | *(__u32*)(sb->set_uuid) = random(); | |
522 | *(__u32*)(sb->set_uuid+4) = random(); | |
523 | *(__u32*)(sb->set_uuid+8) = random(); | |
524 | *(__u32*)(sb->set_uuid+12) = random(); | |
525 | } | |
526 | if (rfd >= 0) close(rfd); | |
82d9eba6 | 527 | |
947fd4dd NB |
528 | memset(sb->set_name, 0, 32); |
529 | strcpy(sb->set_name, name); | |
82d9eba6 NB |
530 | |
531 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
532 | sb->level = __cpu_to_le32(info->level); | |
ea329559 | 533 | sb->layout = __cpu_to_le32(info->layout); |
5dd497ee | 534 | sb->size = __cpu_to_le64(size*2ULL); |
82d9eba6 NB |
535 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); |
536 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
537 | ||
538 | sb->data_offset = __cpu_to_le64(0); | |
539 | sb->data_size = __cpu_to_le64(0); | |
540 | sb->super_offset = __cpu_to_le64(0); | |
541 | sb->recovery_offset = __cpu_to_le64(0); | |
542 | ||
543 | sb->utime = sb->ctime; | |
544 | sb->events = __cpu_to_le64(1); | |
34321279 | 545 | if (info->state & (1<<MD_SB_CLEAN)) |
82d9eba6 NB |
546 | sb->resync_offset = ~0ULL; |
547 | else | |
548 | sb->resync_offset = 0; | |
34163fc7 | 549 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ |
82d9eba6 NB |
550 | sizeof(sb->dev_roles[0])); |
551 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
552 | ||
553 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
554 | ||
555 | *sbp = sb; | |
556 | return 1; | |
557 | } | |
558 | ||
559 | /* Add a device to the superblock being created */ | |
560 | static void add_to_super1(void *sbv, mdu_disk_info_t *dk) | |
561 | { | |
562 | struct mdp_superblock_1 *sb = sbv; | |
563 | __u16 *rp = sb->dev_roles + dk->number; | |
dfd4d8ee | 564 | if ((dk->state & 6) == 6) /* active, sync */ |
82d9eba6 | 565 | *rp = __cpu_to_le16(dk->raid_disk); |
412ca2e5 | 566 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ |
82d9eba6 | 567 | *rp = 0xffff; |
34163fc7 | 568 | else |
82d9eba6 NB |
569 | *rp = 0xfffe; |
570 | } | |
571 | ||
96395475 | 572 | static int store_super1(struct supertype *st, int fd, void *sbv) |
82d9eba6 NB |
573 | { |
574 | struct mdp_superblock_1 *sb = sbv; | |
6fbba4c9 | 575 | unsigned long long sb_offset; |
82d9eba6 | 576 | int sbsize; |
5dd497ee NB |
577 | unsigned long size; |
578 | unsigned long long dsize; | |
96395475 | 579 | |
5dd497ee NB |
580 | #ifdef BLKGETSIZE64 |
581 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
582 | #endif | |
583 | { | |
584 | if (ioctl(fd, BLKGETSIZE, &size)) | |
585 | return 1; | |
586 | else | |
587 | dsize = (unsigned long long)size; | |
588 | } else | |
589 | dsize >>= 9; | |
96395475 | 590 | |
5dd497ee | 591 | if (dsize < 24) |
96395475 NB |
592 | return 2; |
593 | ||
594 | /* | |
595 | * Calculate the position of the superblock. | |
596 | * It is always aligned to a 4K boundary and | |
597 | * depending on minor_version, it can be: | |
598 | * 0: At least 8K, but less than 12K, from end of device | |
599 | * 1: At start of device | |
600 | * 2: 4K from start of device. | |
601 | */ | |
602 | switch(st->minor_version) { | |
603 | case 0: | |
5dd497ee | 604 | sb_offset = dsize; |
96395475 NB |
605 | sb_offset -= 8*2; |
606 | sb_offset &= ~(4*2-1); | |
607 | break; | |
608 | case 1: | |
6fbba4c9 | 609 | sb_offset = 0; |
96395475 NB |
610 | break; |
611 | case 2: | |
612 | sb_offset = 4*2; | |
613 | break; | |
614 | default: | |
615 | return -EINVAL; | |
616 | } | |
617 | ||
82d9eba6 | 618 | |
34163fc7 | 619 | |
6fbba4c9 NB |
620 | if (sb_offset != __le64_to_cpu(sb->super_offset) && |
621 | 0 != __le64_to_cpu(sb->super_offset) | |
96395475 NB |
622 | ) { |
623 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
624 | abort(); | |
625 | } | |
82d9eba6 | 626 | |
6fbba4c9 | 627 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) |
82d9eba6 NB |
628 | return 3; |
629 | ||
630 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
631 | ||
632 | if (write(fd, sb, sbsize) != sbsize) | |
633 | return 4; | |
634 | ||
570c0542 | 635 | fsync(fd); |
82d9eba6 NB |
636 | return 0; |
637 | } | |
638 | ||
892debc8 NB |
639 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname); |
640 | ||
34163fc7 | 641 | static int write_init_super1(struct supertype *st, void *sbv, |
1bf4e2d9 | 642 | mdu_disk_info_t *dinfo, char *devname) |
82d9eba6 NB |
643 | { |
644 | struct mdp_superblock_1 *sb = sbv; | |
e478dc86 | 645 | void *refsbv = NULL; |
892debc8 | 646 | int fd = open(devname, O_RDWR | O_EXCL); |
dfe47e00 | 647 | int rfd; |
82d9eba6 NB |
648 | int rv; |
649 | ||
8fac0577 NB |
650 | unsigned long size, space; |
651 | unsigned long long dsize, array_size; | |
82d9eba6 NB |
652 | long long sb_offset; |
653 | ||
654 | ||
655 | if (fd < 0) { | |
656 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", | |
657 | devname); | |
658 | return -1; | |
659 | } | |
660 | ||
661 | sb->dev_number = __cpu_to_le32(dinfo->number); | |
34163fc7 | 662 | if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY)) |
dfd4d8ee | 663 | sb->devflags |= WriteMostly1; |
892debc8 | 664 | |
dfe47e00 NB |
665 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
666 | read(rfd, sb->device_uuid, 16) != 16) { | |
667 | *(__u32*)(sb->device_uuid) = random(); | |
668 | *(__u32*)(sb->device_uuid+4) = random(); | |
669 | *(__u32*)(sb->device_uuid+8) = random(); | |
670 | *(__u32*)(sb->device_uuid+12) = random(); | |
671 | } | |
672 | if (rfd >= 0) close(rfd); | |
892debc8 NB |
673 | sb->events = 0; |
674 | ||
e478dc86 NB |
675 | if (load_super1(st, fd, &refsbv, NULL)==0) { |
676 | struct mdp_superblock_1 *refsb = refsbv; | |
677 | ||
892debc8 NB |
678 | memcpy(sb->device_uuid, refsb->device_uuid, 16); |
679 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
680 | /* same array, so preserve events and dev_number */ | |
681 | sb->events = refsb->events; | |
682 | sb->dev_number = refsb->dev_number; | |
683 | } | |
684 | free(refsb); | |
685 | } | |
34163fc7 | 686 | |
5dd497ee NB |
687 | #ifdef BLKGETSIZE64 |
688 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
689 | #endif | |
690 | { | |
691 | if (ioctl(fd, BLKGETSIZE, &size)) | |
692 | return 1; | |
693 | else | |
694 | dsize = size; | |
695 | } else | |
696 | dsize >>= 9; | |
82d9eba6 | 697 | |
5dd497ee | 698 | if (dsize < 24) { |
024ce7fe | 699 | close(fd); |
82d9eba6 | 700 | return 2; |
024ce7fe | 701 | } |
82d9eba6 NB |
702 | |
703 | ||
704 | /* | |
705 | * Calculate the position of the superblock. | |
706 | * It is always aligned to a 4K boundary and | |
707 | * depending on minor_version, it can be: | |
708 | * 0: At least 8K, but less than 12K, from end of device | |
709 | * 1: At start of device | |
710 | * 2: 4K from start of device. | |
21e92547 NB |
711 | * Depending on the array size, we might leave extra space |
712 | * for a bitmap. | |
82d9eba6 | 713 | */ |
8fac0577 | 714 | array_size = __le64_to_cpu(sb->size); |
82d9eba6 NB |
715 | switch(st->minor_version) { |
716 | case 0: | |
5dd497ee | 717 | sb_offset = dsize; |
82d9eba6 NB |
718 | sb_offset -= 8*2; |
719 | sb_offset &= ~(4*2-1); | |
720 | sb->super_offset = __cpu_to_le64(sb_offset); | |
721 | sb->data_offset = __cpu_to_le64(0); | |
561832f9 | 722 | if (sb_offset-64*2 >= array_size && array_size > 8*1024*1024*2) |
21e92547 NB |
723 | sb->data_size = __cpu_to_le64(sb_offset-64*2); |
724 | else | |
725 | sb->data_size = __cpu_to_le64(sb_offset); | |
82d9eba6 NB |
726 | break; |
727 | case 1: | |
728 | sb->super_offset = __cpu_to_le64(0); | |
561832f9 | 729 | if (dsize - 64*2 >= array_size && array_size > 8*1024*1024*2) |
21e92547 NB |
730 | space = 64*2; |
731 | else | |
732 | space = 4*2; | |
733 | sb->data_offset = __cpu_to_le64(space); /* leave space for super and bitmap */ | |
734 | sb->data_size = __cpu_to_le64(dsize - space); | |
82d9eba6 NB |
735 | break; |
736 | case 2: | |
737 | sb_offset = 4*2; | |
561832f9 | 738 | if (dsize - 4*2 - 64*2 >= array_size && array_size > 8*1024*1024*2) |
21e92547 NB |
739 | space = 64*2; |
740 | else | |
741 | space = 4*2; | |
82d9eba6 | 742 | sb->super_offset = __cpu_to_le64(sb_offset); |
21e92547 NB |
743 | sb->data_offset = __cpu_to_le64(sb_offset+space); |
744 | sb->data_size = __cpu_to_le64(dsize - 4*2 - space); | |
82d9eba6 NB |
745 | break; |
746 | default: | |
747 | return -EINVAL; | |
748 | } | |
749 | ||
750 | ||
751 | sb->sb_csum = calc_sb_1_csum(sb); | |
96395475 | 752 | rv = store_super1(st, fd, sb); |
82d9eba6 NB |
753 | if (rv) |
754 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
34163fc7 | 755 | |
1bf4e2d9 NB |
756 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) |
757 | rv = st->ss->write_bitmap(st, fd, sbv); | |
024ce7fe | 758 | close(fd); |
82d9eba6 NB |
759 | return rv; |
760 | } | |
761 | ||
762 | static int compare_super1(void **firstp, void *secondv) | |
763 | { | |
764 | /* | |
765 | * return: | |
766 | * 0 same, or first was empty, and second was copied | |
767 | * 1 second had wrong number | |
768 | * 2 wrong uuid | |
769 | * 3 wrong other info | |
770 | */ | |
771 | struct mdp_superblock_1 *first = *firstp; | |
772 | struct mdp_superblock_1 *second = secondv; | |
773 | ||
774 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
775 | return 1; | |
776 | if (second->major_version != __cpu_to_le32(1)) | |
777 | return 1; | |
778 | ||
779 | if (!first) { | |
780 | first = malloc(1024); | |
781 | memcpy(first, second, 1024); | |
782 | *firstp = first; | |
783 | return 0; | |
784 | } | |
785 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
786 | return 2; | |
787 | ||
788 | if (first->ctime != second->ctime || | |
789 | first->level != second->level || | |
790 | first->layout != second->layout || | |
791 | first->size != second->size || | |
792 | first->chunksize != second->chunksize || | |
793 | first->raid_disks != second->raid_disks) | |
794 | return 3; | |
795 | return 0; | |
796 | } | |
797 | ||
798 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname) | |
799 | { | |
800 | unsigned long size; | |
5dd497ee | 801 | unsigned long long dsize; |
82d9eba6 NB |
802 | unsigned long long sb_offset; |
803 | struct mdp_superblock_1 *super; | |
804 | ||
805 | ||
806 | ||
807 | if (st->ss == NULL) { | |
570c0542 NB |
808 | int bestvers = -1; |
809 | __u64 bestctime = 0; | |
810 | /* guess... choose latest ctime */ | |
82d9eba6 NB |
811 | st->ss = &super1; |
812 | for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) { | |
813 | switch(load_super1(st, fd, sbp, devname)) { | |
570c0542 NB |
814 | case 0: super = *sbp; |
815 | if (bestvers == -1 || | |
816 | bestctime < __le64_to_cpu(super->ctime)) { | |
817 | bestvers = st->minor_version; | |
818 | bestctime = __le64_to_cpu(super->ctime); | |
819 | } | |
820 | free(super); | |
821 | *sbp = NULL; | |
822 | break; | |
82d9eba6 NB |
823 | case 1: st->ss = NULL; return 1; /*bad device */ |
824 | case 2: break; /* bad, try next */ | |
825 | } | |
826 | } | |
570c0542 NB |
827 | if (bestvers != -1) { |
828 | int rv; | |
829 | st->minor_version = bestvers; | |
830 | st->ss = &super1; | |
ea329559 | 831 | st->max_devs = 384; |
570c0542 NB |
832 | rv = load_super1(st, fd, sbp, devname); |
833 | if (rv) st->ss = NULL; | |
834 | return rv; | |
835 | } | |
82d9eba6 NB |
836 | st->ss = NULL; |
837 | return 2; | |
838 | } | |
5dd497ee NB |
839 | #ifdef BLKGETSIZE64 |
840 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
841 | #endif | |
842 | { | |
843 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
844 | if (devname) | |
845 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
846 | devname, strerror(errno)); | |
847 | return 1; | |
848 | } | |
849 | dsize = size; | |
850 | } else | |
851 | dsize >>= 9; | |
82d9eba6 | 852 | |
5dd497ee | 853 | if (dsize < 24) { |
82d9eba6 | 854 | if (devname) |
5dd497ee NB |
855 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", |
856 | devname, dsize); | |
82d9eba6 NB |
857 | return 1; |
858 | } | |
859 | ||
860 | /* | |
861 | * Calculate the position of the superblock. | |
862 | * It is always aligned to a 4K boundary and | |
863 | * depeding on minor_version, it can be: | |
864 | * 0: At least 8K, but less than 12K, from end of device | |
865 | * 1: At start of device | |
866 | * 2: 4K from start of device. | |
867 | */ | |
868 | switch(st->minor_version) { | |
869 | case 0: | |
5dd497ee | 870 | sb_offset = dsize; |
82d9eba6 NB |
871 | sb_offset -= 8*2; |
872 | sb_offset &= ~(4*2-1); | |
873 | break; | |
874 | case 1: | |
875 | sb_offset = 0; | |
876 | break; | |
877 | case 2: | |
878 | sb_offset = 4*2; | |
879 | break; | |
880 | default: | |
881 | return -EINVAL; | |
882 | } | |
883 | ||
884 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
885 | ||
886 | ||
887 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
888 | if (devname) | |
889 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
890 | devname, strerror(errno)); | |
891 | return 1; | |
892 | } | |
893 | ||
34163fc7 | 894 | super = malloc(1024 + sizeof(bitmap_super_t)); |
82d9eba6 NB |
895 | |
896 | if (read(fd, super, 1024) != 1024) { | |
897 | if (devname) | |
898 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
899 | devname); | |
900 | free(super); | |
901 | return 1; | |
902 | } | |
903 | ||
904 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
905 | if (devname) | |
906 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
907 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
908 | free(super); | |
909 | return 2; | |
910 | } | |
911 | ||
912 | if (__le32_to_cpu(super->major_version) != 1) { | |
913 | if (devname) | |
914 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
915 | devname, __le32_to_cpu(super->major_version)); | |
916 | free(super); | |
917 | return 2; | |
918 | } | |
919 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
920 | if (devname) | |
921 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
922 | devname); | |
923 | free(super); | |
924 | return 2; | |
925 | } | |
926 | *sbp = super; | |
927 | return 0; | |
928 | } | |
929 | ||
930 | ||
931 | static struct supertype *match_metadata_desc1(char *arg) | |
932 | { | |
933 | struct supertype *st = malloc(sizeof(*st)); | |
934 | if (!st) return st; | |
935 | ||
936 | st->ss = &super1; | |
ea329559 | 937 | st->max_devs = 384; |
82d9eba6 | 938 | if (strcmp(arg, "1") == 0 || |
576d6d83 NB |
939 | strcmp(arg, "1.0") == 0 || |
940 | strcmp(arg, "default/large") == 0) { | |
82d9eba6 NB |
941 | st->minor_version = 0; |
942 | return st; | |
943 | } | |
944 | if (strcmp(arg, "1.1") == 0) { | |
945 | st->minor_version = 1; | |
946 | return st; | |
947 | } | |
948 | if (strcmp(arg, "1.2") == 0) { | |
949 | st->minor_version = 2; | |
950 | return st; | |
951 | } | |
952 | ||
953 | free(st); | |
954 | return NULL; | |
955 | } | |
956 | ||
34163fc7 NB |
957 | /* find available size on device with this devsize, using |
958 | * superblock type st, and reserving 'reserve' sectors for | |
959 | * a possible bitmap | |
960 | */ | |
1bf4e2d9 | 961 | static __u64 avail_size1(struct supertype *st, __u64 devsize) |
82d9eba6 NB |
962 | { |
963 | if (devsize < 24) | |
964 | return 0; | |
965 | ||
21e92547 NB |
966 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, |
967 | * if biffer than 200Gig, save 128k | |
968 | */ | |
969 | if (devsize > 200*1024*1024*2) | |
970 | devsize -= 128*2; | |
971 | else if (devsize > 8*1024*1024*2) | |
972 | devsize -= 64*2; | |
973 | ||
34163fc7 NB |
974 | switch(st->minor_version) { |
975 | case 0: | |
1bf4e2d9 NB |
976 | /* at end */ |
977 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
34163fc7 | 978 | case 1: |
1bf4e2d9 NB |
979 | /* at start, 4K for superblock and possible bitmap */ |
980 | return devsize - 4*2; | |
34163fc7 | 981 | case 2: |
1bf4e2d9 NB |
982 | /* 4k from start, 4K for superblock and possible bitmap */ |
983 | return devsize - (4+4)*2; | |
34163fc7 NB |
984 | } |
985 | return 0; | |
986 | } | |
987 | ||
1bf4e2d9 NB |
988 | static int |
989 | add_internal_bitmap1(struct supertype *st, void *sbv, | |
21e92547 NB |
990 | int chunk, int delay, int write_behind, unsigned long long size, |
991 | int may_change, int major) | |
34163fc7 NB |
992 | { |
993 | /* | |
1bf4e2d9 NB |
994 | * If not may_change, then this is a 'Grow', and the bitmap |
995 | * must fit after the superblock. | |
996 | * If may_change, then this is create, and we can put the bitmap | |
997 | * before the superblock if we like, or may move the start. | |
998 | * For now, just squeeze the bitmap into 3k and don't change anything. | |
34163fc7 | 999 | * |
f9c25f1d | 1000 | * size is in sectors, chunk is in bytes !!! |
34163fc7 NB |
1001 | */ |
1002 | ||
1bf4e2d9 NB |
1003 | unsigned long long bits; |
1004 | unsigned long long max_bits = (3*512 - sizeof(bitmap_super_t)) * 8; | |
34163fc7 NB |
1005 | unsigned long long min_chunk; |
1006 | struct mdp_superblock_1 *sb = sbv; | |
1007 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
1008 | ||
1bf4e2d9 NB |
1009 | if (st->minor_version && !may_change && |
1010 | __le64_to_cpu(sb->data_offset) - __le64_to_cpu(sb->super_offset) < 8) | |
1011 | return 0; /* doesn't fit */ | |
1012 | ||
1013 | ||
34163fc7 NB |
1014 | |
1015 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
f9c25f1d | 1016 | bits = (size*512)/min_chunk +1; |
34163fc7 NB |
1017 | while (bits > max_bits) { |
1018 | min_chunk *= 2; | |
1019 | bits = (bits+1)/2; | |
1020 | } | |
1021 | if (chunk == UnSet) | |
1022 | chunk = min_chunk; | |
1023 | else if (chunk < min_chunk) | |
1024 | return 0; /* chunk size too small */ | |
21e92547 NB |
1025 | if (chunk == 0) /* rounding problem */ |
1026 | return 0; | |
34163fc7 | 1027 | |
1bf4e2d9 | 1028 | sb->bitmap_offset = __cpu_to_le32(2); |
34163fc7 NB |
1029 | |
1030 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
29e766a5 | 1031 | memset(bms, 0, sizeof(*bms)); |
34163fc7 | 1032 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
dcec9ee5 | 1033 | bms->version = __cpu_to_le32(major); |
34163fc7 NB |
1034 | uuid_from_super1((int*)bms->uuid, sb); |
1035 | bms->chunksize = __cpu_to_le32(chunk); | |
1036 | bms->daemon_sleep = __cpu_to_le32(delay); | |
f9c25f1d | 1037 | bms->sync_size = __cpu_to_le64(size); |
34163fc7 NB |
1038 | bms->write_behind = __cpu_to_le32(write_behind); |
1039 | ||
34163fc7 NB |
1040 | return 1; |
1041 | } | |
1042 | ||
1043 | ||
f6d75de8 | 1044 | void locate_bitmap1(struct supertype *st, int fd, void *sbv) |
34163fc7 | 1045 | { |
34163fc7 | 1046 | unsigned long long offset; |
1e0d770c NB |
1047 | struct mdp_superblock_1 *sb; |
1048 | int mustfree = 0; | |
34163fc7 | 1049 | |
1e0d770c NB |
1050 | if (!sbv) { |
1051 | if (st->ss->load_super(st, fd, &sbv, NULL)) | |
f6d75de8 | 1052 | return; /* no error I hope... */ |
1e0d770c NB |
1053 | mustfree = 1; |
1054 | } | |
1055 | sb = sbv; | |
e478dc86 | 1056 | |
1bf4e2d9 NB |
1057 | offset = __le64_to_cpu(sb->super_offset); |
1058 | offset += (long) __le32_to_cpu(sb->bitmap_offset); | |
1e0d770c | 1059 | if (mustfree) |
f6d75de8 | 1060 | free(sb); |
1bf4e2d9 | 1061 | lseek64(fd, offset<<9, 0); |
34163fc7 NB |
1062 | } |
1063 | ||
1064 | int write_bitmap1(struct supertype *st, int fd, void *sbv) | |
1065 | { | |
1066 | struct mdp_superblock_1 *sb = sbv; | |
1bf4e2d9 | 1067 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); |
34163fc7 NB |
1068 | int rv = 0; |
1069 | ||
1070 | int towrite, n; | |
1071 | char buf[4096]; | |
1072 | ||
f6d75de8 | 1073 | locate_bitmap1(st, fd, sbv); |
34163fc7 | 1074 | |
1e0d770c NB |
1075 | if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) != |
1076 | sizeof(bitmap_super_t)) | |
1077 | return -2; | |
1bf4e2d9 NB |
1078 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); |
1079 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
34163fc7 NB |
1080 | memset(buf, 0xff, sizeof(buf)); |
1081 | while (towrite > 0) { | |
1082 | n = towrite; | |
1083 | if (n > sizeof(buf)) | |
1084 | n = sizeof(buf); | |
1085 | n = write(fd, buf, n); | |
1086 | if (n > 0) | |
1087 | towrite -= n; | |
1088 | else | |
1089 | break; | |
1090 | } | |
1091 | fsync(fd); | |
1092 | if (towrite) | |
1093 | rv = -2; | |
1094 | ||
1095 | return rv; | |
82d9eba6 NB |
1096 | } |
1097 | ||
1098 | struct superswitch super1 = { | |
c7654afc | 1099 | #ifndef MDASSEMBLE |
82d9eba6 NB |
1100 | .examine_super = examine_super1, |
1101 | .brief_examine_super = brief_examine_super1, | |
1102 | .detail_super = detail_super1, | |
1103 | .brief_detail_super = brief_detail_super1, | |
c7654afc | 1104 | #endif |
82d9eba6 NB |
1105 | .uuid_from_super = uuid_from_super1, |
1106 | .getinfo_super = getinfo_super1, | |
1107 | .update_super = update_super1, | |
1108 | .event_super = event_super1, | |
1109 | .init_super = init_super1, | |
1110 | .add_to_super = add_to_super1, | |
1111 | .store_super = store_super1, | |
1112 | .write_init_super = write_init_super1, | |
1113 | .compare_super = compare_super1, | |
1114 | .load_super = load_super1, | |
1115 | .match_metadata_desc = match_metadata_desc1, | |
1116 | .avail_size = avail_size1, | |
34163fc7 NB |
1117 | .add_internal_bitmap = add_internal_bitmap1, |
1118 | .locate_bitmap = locate_bitmap1, | |
1119 | .write_bitmap = write_bitmap1, | |
82d9eba6 | 1120 | .major = 1, |
f277ce36 NB |
1121 | #if __BYTE_ORDER == BIG_ENDIAN |
1122 | .swapuuid = 0, | |
1123 | #else | |
1124 | .swapuuid = 1, | |
1125 | #endif | |
82d9eba6 | 1126 | }; |