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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> | |
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" | |
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; | |
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 | */ | |
59 | ||
60 | /* These are only valid with feature bit '4' */ | |
61 | __u32 new_level; /* new level we are reshaping to */ | |
62 | __u64 reshape_position; /* next address in array-space for reshape */ | |
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 */ | |
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 */ | |
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 */ | |
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 | ||
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 | */ | |
102 | #define MD_FEATURE_RESHAPE_ACTIVE 4 | |
103 | ||
104 | #define MD_FEATURE_ALL (1|2|4) | |
105 | ||
106 | #ifndef offsetof | |
107 | #define offsetof(t,f) ((size_t)&(((t*)0)->f)) | |
108 | #endif | |
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 | isuper++; | |
130 | } | |
131 | ||
132 | if (size == 2) | |
133 | newcsum += __le16_to_cpu(*(unsigned short*) isuper); | |
134 | ||
135 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
136 | sb->sb_csum = disk_csum; | |
137 | return __cpu_to_le32(csum); | |
138 | } | |
139 | ||
140 | #ifndef MDASSEMBLE | |
141 | static void examine_super1(void *sbv, char *homehost) | |
142 | { | |
143 | struct mdp_superblock_1 *sb = sbv; | |
144 | time_t atime; | |
145 | int d; | |
146 | int faulty; | |
147 | int i; | |
148 | char *c; | |
149 | int l = homehost ? strlen(homehost) : 0; | |
150 | int layout; | |
151 | ||
152 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
153 | printf(" Version : %02d\n", 1); | |
154 | printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); | |
155 | printf(" Array UUID : "); | |
156 | for (i=0; i<16; i++) { | |
157 | if ((i&3)==0 && i != 0) printf(":"); | |
158 | printf("%02x", sb->set_uuid[i]); | |
159 | } | |
160 | printf("\n"); | |
161 | printf(" Name : %.32s", sb->set_name); | |
162 | if (l > 0 && l < 32 && | |
163 | sb->set_name[l] == ':' && | |
164 | strncmp(sb->set_name, homehost, l) == 0) | |
165 | printf(" (local to host %s)", homehost); | |
166 | printf("\n"); | |
167 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
168 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
169 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
170 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
171 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
172 | printf("\n"); | |
173 | printf(" Device Size : %llu%s\n", (unsigned long long)sb->data_size, human_size(sb->data_size<<9)); | |
174 | if (__le32_to_cpu(sb->level) >= 0) { | |
175 | int ddsks=0; | |
176 | switch(__le32_to_cpu(sb->level)) { | |
177 | case 1: ddsks=1;break; | |
178 | case 4: | |
179 | case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break; | |
180 | case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break; | |
181 | case 10: | |
182 | layout = __le32_to_cpu(sb->layout); | |
183 | ddsks = __le32_to_cpu(sb->raid_disks) | |
184 | / (layout&255) / ((layout>>8)&255); | |
185 | } | |
186 | if (ddsks) | |
187 | printf(" Array Size : %llu%s\n", | |
188 | ddsks*(unsigned long long)__le64_to_cpu(sb->size), | |
189 | human_size(ddsks*__le64_to_cpu(sb->size)<<9)); | |
190 | if (sb->size != sb->data_size) | |
191 | printf(" Used Size : %llu%s\n", | |
192 | (unsigned long long)__le64_to_cpu(sb->size), | |
193 | human_size(__le64_to_cpu(sb->size)<<9)); | |
194 | } | |
195 | if (sb->data_offset) | |
196 | printf(" Data Offset : %llu sectors\n", | |
197 | (unsigned long long)__le64_to_cpu(sb->data_offset)); | |
198 | printf(" Super Offset : %llu sectors\n", | |
199 | (unsigned long long)__le64_to_cpu(sb->super_offset)); | |
200 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) | |
201 | printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset)); | |
202 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); | |
203 | printf(" Device UUID : "); | |
204 | for (i=0; i<16; i++) { | |
205 | if ((i&3)==0 && i != 0) printf(":"); | |
206 | printf("%02x", sb->device_uuid[i]); | |
207 | } | |
208 | printf("\n"); | |
209 | printf("\n"); | |
210 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
211 | printf("Internal Bitmap : %ld sectors from superblock\n", | |
212 | (long)__le32_to_cpu(sb->bitmap_offset)); | |
213 | } | |
214 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
215 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2, | |
216 | human_size(__le64_to_cpu(sb->reshape_position)<<9)); | |
217 | if (__le32_to_cpu(sb->delta_disks)) { | |
218 | printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks)); | |
219 | if (__le32_to_cpu(sb->delta_disks)) | |
220 | printf(" (%d->%d)\n", | |
221 | __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks), | |
222 | __le32_to_cpu(sb->raid_disks)); | |
223 | else | |
224 | printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks), | |
225 | __le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks)); | |
226 | } | |
227 | if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { | |
228 | c = map_num(pers, __le32_to_cpu(sb->new_level)); | |
229 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
230 | } | |
231 | if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) { | |
232 | if (__le32_to_cpu(sb->level) == 5) { | |
233 | c = map_num(r5layout, __le32_to_cpu(sb->new_layout)); | |
234 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
235 | } | |
236 | if (__le32_to_cpu(sb->level) == 10) { | |
237 | printf(" New Layout : near=%d, %s=%d\n", | |
238 | __le32_to_cpu(sb->new_layout)&255, | |
239 | (__le32_to_cpu(sb->new_layout)&0x10000)?"offset":"far", | |
240 | (__le32_to_cpu(sb->new_layout)>>8)&255); | |
241 | } | |
242 | } | |
243 | if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) | |
244 | printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); | |
245 | printf("\n"); | |
246 | } | |
247 | if (sb->devflags) { | |
248 | printf(" Flags :"); | |
249 | if (sb->devflags & WriteMostly1) | |
250 | printf(" write-mostly"); | |
251 | printf("\n"); | |
252 | } | |
253 | ||
254 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
255 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
256 | ||
257 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
258 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
259 | else | |
260 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
261 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
262 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
263 | printf("\n"); | |
264 | if (__le32_to_cpu(sb->level) == 5) { | |
265 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
266 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
267 | } | |
268 | if (__le32_to_cpu(sb->level) == 10) { | |
269 | int lo = __le32_to_cpu(sb->layout); | |
270 | printf(" Layout : near=%d, %s=%d\n", | |
271 | lo&255, | |
272 | (lo&0x10000)?"offset":"far", | |
273 | (lo>>8)&255); | |
274 | } | |
275 | switch(__le32_to_cpu(sb->level)) { | |
276 | case 0: | |
277 | case 4: | |
278 | case 5: | |
279 | case 6: | |
280 | case 10: | |
281 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
282 | break; | |
283 | case -1: | |
284 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
285 | break; | |
286 | default: break; | |
287 | } | |
288 | printf("\n"); | |
289 | printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number)); | |
290 | for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--) | |
291 | if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff) | |
292 | break; | |
293 | for (d=0; d < i; d++) { | |
294 | int role = __le16_to_cpu(sb->dev_roles[d]); | |
295 | if (d) printf(", "); | |
296 | if (role == 0xffff) printf("empty"); | |
297 | else if(role == 0xfffe) printf("failed"); | |
298 | else printf("%d", role); | |
299 | } | |
300 | printf(")\n"); | |
301 | printf(" Array State : "); | |
302 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
303 | int cnt = 0; | |
304 | int me = 0; | |
305 | int i; | |
306 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
307 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
308 | if (role == d) { | |
309 | if (i == __le32_to_cpu(sb->dev_number)) | |
310 | me = 1; | |
311 | cnt++; | |
312 | } | |
313 | } | |
314 | if (cnt > 1) printf("?"); | |
315 | else if (cnt == 1 && me) printf("U"); | |
316 | else if (cnt == 1) printf("u"); | |
317 | else printf ("_"); | |
318 | } | |
319 | faulty = 0; | |
320 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
321 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
322 | if (role == 0xFFFE) | |
323 | faulty++; | |
324 | } | |
325 | if (faulty) printf(" %d failed", faulty); | |
326 | printf("\n"); | |
327 | } | |
328 | ||
329 | ||
330 | static void brief_examine_super1(void *sbv) | |
331 | { | |
332 | struct mdp_superblock_1 *sb = sbv; | |
333 | int i; | |
334 | char *nm; | |
335 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
336 | ||
337 | nm = strchr(sb->set_name, ':'); | |
338 | if (nm) | |
339 | nm++; | |
340 | else if (sb->set_name[0]) | |
341 | nm = sb->set_name; | |
342 | else | |
343 | nm = "??"; | |
344 | ||
345 | printf("ARRAY /dev/md/%s level=%s metadata=1 num-devices=%d UUID=", | |
346 | nm, | |
347 | c?c:"-unknown-", __le32_to_cpu(sb->raid_disks)); | |
348 | for (i=0; i<16; i++) { | |
349 | if ((i&3)==0 && i != 0) printf(":"); | |
350 | printf("%02x", sb->set_uuid[i]); | |
351 | } | |
352 | if (sb->set_name[0]) | |
353 | printf(" name=%.32s", sb->set_name); | |
354 | printf("\n"); | |
355 | } | |
356 | ||
357 | static void detail_super1(void *sbv, char *homehost) | |
358 | { | |
359 | struct mdp_superblock_1 *sb = sbv; | |
360 | int i; | |
361 | int l = homehost ? strlen(homehost) : 0; | |
362 | ||
363 | printf(" Name : %.32s", sb->set_name); | |
364 | if (l > 0 && l < 32 && | |
365 | sb->set_name[l] == ':' && | |
366 | strncmp(sb->set_name, homehost, l) == 0) | |
367 | printf(" (local to host %s)", homehost); | |
368 | printf("\n UUID : "); | |
369 | for (i=0; i<16; i++) { | |
370 | if ((i&3)==0 && i != 0) printf(":"); | |
371 | printf("%02x", sb->set_uuid[i]); | |
372 | } | |
373 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
374 | } | |
375 | ||
376 | static void brief_detail_super1(void *sbv) | |
377 | { | |
378 | struct mdp_superblock_1 *sb = sbv; | |
379 | int i; | |
380 | ||
381 | if (sb->set_name[0]) | |
382 | printf(" name=%.32s", sb->set_name); | |
383 | printf(" UUID="); | |
384 | for (i=0; i<16; i++) { | |
385 | if ((i&3)==0 && i != 0) printf(":"); | |
386 | printf("%02x", sb->set_uuid[i]); | |
387 | } | |
388 | } | |
389 | ||
390 | #endif | |
391 | ||
392 | static int match_home1(void *sbv, char *homehost) | |
393 | { | |
394 | struct mdp_superblock_1 *sb = sbv; | |
395 | int l = homehost ? strlen(homehost) : 0; | |
396 | ||
397 | return (l > 0 && l < 32 && | |
398 | sb->set_name[l] == ':' && | |
399 | strncmp(sb->set_name, homehost, l) == 0); | |
400 | } | |
401 | ||
402 | static void uuid_from_super1(int uuid[4], void * sbv) | |
403 | { | |
404 | struct mdp_superblock_1 *super = sbv; | |
405 | char *cuuid = (char*)uuid; | |
406 | int i; | |
407 | for (i=0; i<16; i++) | |
408 | cuuid[i] = super->set_uuid[i]; | |
409 | } | |
410 | ||
411 | static void getinfo_super1(struct mdinfo *info, void *sbv) | |
412 | { | |
413 | struct mdp_superblock_1 *sb = sbv; | |
414 | int working = 0; | |
415 | int i; | |
416 | int role; | |
417 | ||
418 | info->array.major_version = 1; | |
419 | info->array.minor_version = __le32_to_cpu(sb->feature_map); | |
420 | info->array.patch_version = 0; | |
421 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
422 | info->array.level = __le32_to_cpu(sb->level); | |
423 | info->array.layout = __le32_to_cpu(sb->layout); | |
424 | info->array.md_minor = -1; | |
425 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
426 | info->array.utime = __le64_to_cpu(sb->utime); | |
427 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; | |
428 | ||
429 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
430 | info->component_size = __le64_to_cpu(sb->size); | |
431 | ||
432 | info->disk.major = 0; | |
433 | info->disk.minor = 0; | |
434 | info->disk.number = __le32_to_cpu(sb->dev_number); | |
435 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || | |
436 | __le32_to_cpu(sb->max_dev) > 512) | |
437 | role = 0xfffe; | |
438 | else | |
439 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
440 | ||
441 | info->disk.raid_disk = -1; | |
442 | switch(role) { | |
443 | case 0xFFFF: | |
444 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
445 | break; | |
446 | case 0xFFFE: | |
447 | info->disk.state = 1; /* faulty */ | |
448 | break; | |
449 | default: | |
450 | info->disk.state = 6; /* active and in sync */ | |
451 | info->disk.raid_disk = role; | |
452 | } | |
453 | info->events = __le64_to_cpu(sb->events); | |
454 | ||
455 | memcpy(info->uuid, sb->set_uuid, 16); | |
456 | ||
457 | strncpy(info->name, sb->set_name, 32); | |
458 | info->name[32] = 0; | |
459 | ||
460 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
461 | info->reshape_active = 1; | |
462 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
463 | info->new_level = __le32_to_cpu(sb->new_level); | |
464 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
465 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
466 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; | |
467 | } else | |
468 | info->reshape_active = 0; | |
469 | ||
470 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
471 | role = __le16_to_cpu(sb->dev_roles[i]); | |
472 | if (/*role == 0xFFFF || */role < info->array.raid_disks) | |
473 | working++; | |
474 | } | |
475 | ||
476 | info->array.working_disks = working; | |
477 | } | |
478 | ||
479 | static int update_super1(struct mdinfo *info, void *sbv, char *update, | |
480 | char *devname, int verbose, | |
481 | int uuid_set, char *homehost) | |
482 | { | |
483 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. | |
484 | * For others, the return value is ignored. | |
485 | */ | |
486 | int rv = 0; | |
487 | struct mdp_superblock_1 *sb = sbv; | |
488 | ||
489 | if (strcmp(update, "force-one")==0) { | |
490 | /* Not enough devices for a working array, | |
491 | * so bring this one up-to-date | |
492 | */ | |
493 | if (sb->events != __cpu_to_le64(info->events)) | |
494 | rv = 1; | |
495 | sb->events = __cpu_to_le64(info->events); | |
496 | } | |
497 | if (strcmp(update, "force-array")==0) { | |
498 | /* Degraded array and 'force' requests to | |
499 | * maybe need to mark it 'clean'. | |
500 | */ | |
501 | switch(__le32_to_cpu(sb->level)) { | |
502 | case 5: case 4: case 6: | |
503 | /* need to force clean */ | |
504 | if (sb->resync_offset != ~0ULL) | |
505 | rv = 1; | |
506 | sb->resync_offset = ~0ULL; | |
507 | } | |
508 | } | |
509 | if (strcmp(update, "assemble")==0) { | |
510 | int d = info->disk.number; | |
511 | int want; | |
512 | if (info->disk.state == 6) | |
513 | want = __cpu_to_le32(info->disk.raid_disk); | |
514 | else | |
515 | want = 0xFFFF; | |
516 | if (sb->dev_roles[d] != want) { | |
517 | sb->dev_roles[d] = want; | |
518 | rv = 1; | |
519 | } | |
520 | } | |
521 | if (strcmp(update, "grow") == 0) { | |
522 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
523 | /* FIXME */ | |
524 | } | |
525 | if (strcmp(update, "resync") == 0) { | |
526 | /* make sure resync happens */ | |
527 | sb->resync_offset = 0ULL; | |
528 | } | |
529 | if (strcmp(update, "uuid") == 0) { | |
530 | memcpy(sb->set_uuid, info->uuid, 16); | |
531 | if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
532 | struct bitmap_super_s *bm; | |
533 | bm = (struct bitmap_super_s*)(sbv+1024); | |
534 | memcpy(bm->uuid, info->uuid, 16); | |
535 | } | |
536 | } | |
537 | if (strcmp(update, "homehost") == 0 && | |
538 | homehost) { | |
539 | char *c; | |
540 | update = "name"; | |
541 | c = strchr(sb->set_name, ':'); | |
542 | if (c) | |
543 | strncpy(info->name, c+1, 31 - (c-sb->set_name)); | |
544 | else | |
545 | strncpy(info->name, sb->set_name, 32); | |
546 | info->name[32] = 0; | |
547 | } | |
548 | if (strcmp(update, "name") == 0) { | |
549 | if (info->name[0] == 0) | |
550 | sprintf(info->name, "%d", info->array.md_minor); | |
551 | memset(sb->set_name, 0, sizeof(sb->set_name)); | |
552 | if (homehost && | |
553 | strchr(info->name, ':') == NULL && | |
554 | strlen(homehost)+1+strlen(info->name) < 32) { | |
555 | strcpy(sb->set_name, homehost); | |
556 | strcat(sb->set_name, ":"); | |
557 | strcat(sb->set_name, info->name); | |
558 | } else | |
559 | strcpy(sb->set_name, info->name); | |
560 | } | |
561 | if (strcmp(update, "_reshape_progress")==0) | |
562 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
563 | ||
564 | sb->sb_csum = calc_sb_1_csum(sb); | |
565 | return rv; | |
566 | } | |
567 | ||
568 | static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info, | |
569 | unsigned long long size, char *name, char *homehost) | |
570 | { | |
571 | struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t)); | |
572 | int spares; | |
573 | int rfd; | |
574 | char defname[10]; | |
575 | memset(sb, 0, 1024); | |
576 | ||
577 | if (info->major_version == -1) { | |
578 | /* zeroing superblock */ | |
579 | *sbp = sb; | |
580 | return 0; | |
581 | } | |
582 | ||
583 | spares = info->working_disks - info->active_disks; | |
584 | if (info->raid_disks + spares > 384) { | |
585 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
586 | info->raid_disks , spares, 384); | |
587 | return 0; | |
588 | } | |
589 | ||
590 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
591 | sb->major_version = __cpu_to_le32(1); | |
592 | sb->feature_map = 0; | |
593 | sb->pad0 = 0; | |
594 | ||
595 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
596 | read(rfd, sb->set_uuid, 16) != 16) { | |
597 | *(__u32*)(sb->set_uuid) = random(); | |
598 | *(__u32*)(sb->set_uuid+4) = random(); | |
599 | *(__u32*)(sb->set_uuid+8) = random(); | |
600 | *(__u32*)(sb->set_uuid+12) = random(); | |
601 | } | |
602 | if (rfd >= 0) close(rfd); | |
603 | ||
604 | if (name == NULL || *name == 0) { | |
605 | sprintf(defname, "%d", info->md_minor); | |
606 | name = defname; | |
607 | } | |
608 | memset(sb->set_name, 0, 32); | |
609 | if (homehost && | |
610 | strchr(name, ':')== NULL && | |
611 | strlen(homehost)+1+strlen(name) < 32) { | |
612 | strcpy(sb->set_name, homehost); | |
613 | strcat(sb->set_name, ":"); | |
614 | strcat(sb->set_name, name); | |
615 | } else | |
616 | strcpy(sb->set_name, name); | |
617 | ||
618 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
619 | sb->level = __cpu_to_le32(info->level); | |
620 | sb->layout = __cpu_to_le32(info->layout); | |
621 | sb->size = __cpu_to_le64(size*2ULL); | |
622 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
623 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
624 | ||
625 | sb->data_offset = __cpu_to_le64(0); | |
626 | sb->data_size = __cpu_to_le64(0); | |
627 | sb->super_offset = __cpu_to_le64(0); | |
628 | sb->recovery_offset = __cpu_to_le64(0); | |
629 | ||
630 | sb->utime = sb->ctime; | |
631 | sb->events = __cpu_to_le64(1); | |
632 | if (info->state & (1<<MD_SB_CLEAN)) | |
633 | sb->resync_offset = ~0ULL; | |
634 | else | |
635 | sb->resync_offset = 0; | |
636 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ | |
637 | sizeof(sb->dev_roles[0])); | |
638 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
639 | ||
640 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
641 | ||
642 | *sbp = sb; | |
643 | return 1; | |
644 | } | |
645 | ||
646 | /* Add a device to the superblock being created */ | |
647 | static void add_to_super1(void *sbv, mdu_disk_info_t *dk) | |
648 | { | |
649 | struct mdp_superblock_1 *sb = sbv; | |
650 | __u16 *rp = sb->dev_roles + dk->number; | |
651 | if ((dk->state & 6) == 6) /* active, sync */ | |
652 | *rp = __cpu_to_le16(dk->raid_disk); | |
653 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ | |
654 | *rp = 0xffff; | |
655 | else | |
656 | *rp = 0xfffe; | |
657 | } | |
658 | ||
659 | static void locate_bitmap1(struct supertype *st, int fd, void *sbv); | |
660 | ||
661 | static int store_super1(struct supertype *st, int fd, void *sbv) | |
662 | { | |
663 | struct mdp_superblock_1 *sb = sbv; | |
664 | unsigned long long sb_offset; | |
665 | int sbsize; | |
666 | unsigned long size; | |
667 | unsigned long long dsize; | |
668 | ||
669 | #ifdef BLKGETSIZE64 | |
670 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
671 | #endif | |
672 | { | |
673 | if (ioctl(fd, BLKGETSIZE, &size)) | |
674 | return 1; | |
675 | else | |
676 | dsize = (unsigned long long)size; | |
677 | } else | |
678 | dsize >>= 9; | |
679 | ||
680 | if (dsize < 24) | |
681 | return 2; | |
682 | ||
683 | /* | |
684 | * Calculate the position of the superblock. | |
685 | * It is always aligned to a 4K boundary and | |
686 | * depending on minor_version, it can be: | |
687 | * 0: At least 8K, but less than 12K, from end of device | |
688 | * 1: At start of device | |
689 | * 2: 4K from start of device. | |
690 | */ | |
691 | switch(st->minor_version) { | |
692 | case 0: | |
693 | sb_offset = dsize; | |
694 | sb_offset -= 8*2; | |
695 | sb_offset &= ~(4*2-1); | |
696 | break; | |
697 | case 1: | |
698 | sb_offset = 0; | |
699 | break; | |
700 | case 2: | |
701 | sb_offset = 4*2; | |
702 | break; | |
703 | default: | |
704 | return -EINVAL; | |
705 | } | |
706 | ||
707 | ||
708 | ||
709 | if (sb_offset != __le64_to_cpu(sb->super_offset) && | |
710 | 0 != __le64_to_cpu(sb->super_offset) | |
711 | ) { | |
712 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
713 | abort(); | |
714 | } | |
715 | ||
716 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) | |
717 | return 3; | |
718 | ||
719 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
720 | ||
721 | if (write(fd, sb, sbsize) != sbsize) | |
722 | return 4; | |
723 | ||
724 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
725 | struct bitmap_super_s *bm = (struct bitmap_super_s*) | |
726 | (((char*)sb)+1024); | |
727 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { | |
728 | locate_bitmap1(st, fd, sbv); | |
729 | if (write(fd, bm, sizeof(*bm)) != sizeof(*bm)) | |
730 | return 5; | |
731 | } | |
732 | } | |
733 | fsync(fd); | |
734 | return 0; | |
735 | } | |
736 | ||
737 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname); | |
738 | ||
739 | static int write_init_super1(struct supertype *st, void *sbv, | |
740 | mdu_disk_info_t *dinfo, char *devname) | |
741 | { | |
742 | struct mdp_superblock_1 *sb = sbv; | |
743 | void *refsbv = NULL; | |
744 | int fd = open(devname, O_RDWR | O_EXCL); | |
745 | int rfd; | |
746 | int rv; | |
747 | int bm_space; | |
748 | ||
749 | unsigned long space; | |
750 | unsigned long long dsize, array_size; | |
751 | long long sb_offset; | |
752 | ||
753 | ||
754 | if (fd < 0) { | |
755 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", | |
756 | devname); | |
757 | return -1; | |
758 | } | |
759 | ||
760 | sb->dev_number = __cpu_to_le32(dinfo->number); | |
761 | if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY)) | |
762 | sb->devflags |= __cpu_to_le32(WriteMostly1); | |
763 | ||
764 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
765 | read(rfd, sb->device_uuid, 16) != 16) { | |
766 | *(__u32*)(sb->device_uuid) = random(); | |
767 | *(__u32*)(sb->device_uuid+4) = random(); | |
768 | *(__u32*)(sb->device_uuid+8) = random(); | |
769 | *(__u32*)(sb->device_uuid+12) = random(); | |
770 | } | |
771 | if (rfd >= 0) close(rfd); | |
772 | sb->events = 0; | |
773 | ||
774 | if (load_super1(st, fd, &refsbv, NULL)==0) { | |
775 | struct mdp_superblock_1 *refsb = refsbv; | |
776 | ||
777 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
778 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
779 | /* same array, so preserve events and dev_number */ | |
780 | sb->events = refsb->events; | |
781 | /* bugs in 2.6.17 and earlier mean the dev_number | |
782 | * chosen in Manage must be preserved | |
783 | */ | |
784 | if (get_linux_version() >= 2006018) | |
785 | sb->dev_number = refsb->dev_number; | |
786 | } | |
787 | free(refsb); | |
788 | } | |
789 | ||
790 | #ifdef BLKGETSIZE64 | |
791 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
792 | #endif | |
793 | { | |
794 | unsigned long size; | |
795 | if (ioctl(fd, BLKGETSIZE, &size)) | |
796 | return 1; | |
797 | else | |
798 | dsize = size; | |
799 | } else | |
800 | dsize >>= 9; | |
801 | ||
802 | if (dsize < 24) { | |
803 | close(fd); | |
804 | return 2; | |
805 | } | |
806 | ||
807 | ||
808 | /* | |
809 | * Calculate the position of the superblock. | |
810 | * It is always aligned to a 4K boundary and | |
811 | * depending on minor_version, it can be: | |
812 | * 0: At least 8K, but less than 12K, from end of device | |
813 | * 1: At start of device | |
814 | * 2: 4K from start of device. | |
815 | * Depending on the array size, we might leave extra space | |
816 | * for a bitmap. | |
817 | */ | |
818 | array_size = __le64_to_cpu(sb->size); | |
819 | /* work out how much space we left of a bitmap */ | |
820 | if (array_size >= 200*1024*1024*2) | |
821 | bm_space = 128*2; | |
822 | else if (array_size > 8*1024*1024*2) | |
823 | bm_space = 64*2; | |
824 | else | |
825 | bm_space = 0; | |
826 | ||
827 | switch(st->minor_version) { | |
828 | case 0: | |
829 | sb_offset = dsize; | |
830 | sb_offset -= 8*2; | |
831 | sb_offset &= ~(4*2-1); | |
832 | sb->super_offset = __cpu_to_le64(sb_offset); | |
833 | sb->data_offset = __cpu_to_le64(0); | |
834 | sb->data_size = __cpu_to_le64(sb_offset - bm_space); | |
835 | break; | |
836 | case 1: | |
837 | sb->super_offset = __cpu_to_le64(0); | |
838 | sb->data_offset = __cpu_to_le64(bm_space + 4*2); | |
839 | sb->data_size = __cpu_to_le64(dsize - bm_space - 4*2); | |
840 | break; | |
841 | case 2: | |
842 | sb_offset = 4*2; | |
843 | if (dsize - 4*2 - 64*2 >= array_size && array_size > 8*1024*1024*2) | |
844 | space = 64*2; | |
845 | else | |
846 | space = 4*2; | |
847 | sb->super_offset = __cpu_to_le64(4*2); | |
848 | sb->data_offset = __cpu_to_le64(4*2 + 4*2 + bm_space); | |
849 | sb->data_size = __cpu_to_le64(dsize - 4*2 - 4*2 - bm_space ); | |
850 | break; | |
851 | default: | |
852 | return -EINVAL; | |
853 | } | |
854 | ||
855 | ||
856 | sb->sb_csum = calc_sb_1_csum(sb); | |
857 | rv = store_super1(st, fd, sb); | |
858 | if (rv) | |
859 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
860 | ||
861 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) | |
862 | rv = st->ss->write_bitmap(st, fd, sbv); | |
863 | close(fd); | |
864 | return rv; | |
865 | } | |
866 | ||
867 | static int compare_super1(void **firstp, void *secondv) | |
868 | { | |
869 | /* | |
870 | * return: | |
871 | * 0 same, or first was empty, and second was copied | |
872 | * 1 second had wrong number | |
873 | * 2 wrong uuid | |
874 | * 3 wrong other info | |
875 | */ | |
876 | struct mdp_superblock_1 *first = *firstp; | |
877 | struct mdp_superblock_1 *second = secondv; | |
878 | ||
879 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
880 | return 1; | |
881 | if (second->major_version != __cpu_to_le32(1)) | |
882 | return 1; | |
883 | ||
884 | if (!first) { | |
885 | first = malloc(1024+sizeof(bitmap_super_t)); | |
886 | memcpy(first, second, 1024+sizeof(bitmap_super_t)); | |
887 | *firstp = first; | |
888 | return 0; | |
889 | } | |
890 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
891 | return 2; | |
892 | ||
893 | if (first->ctime != second->ctime || | |
894 | first->level != second->level || | |
895 | first->layout != second->layout || | |
896 | first->size != second->size || | |
897 | first->chunksize != second->chunksize || | |
898 | first->raid_disks != second->raid_disks) | |
899 | return 3; | |
900 | return 0; | |
901 | } | |
902 | ||
903 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname) | |
904 | { | |
905 | unsigned long size; | |
906 | unsigned long long dsize; | |
907 | unsigned long long sb_offset; | |
908 | struct mdp_superblock_1 *super; | |
909 | int uuid[4]; | |
910 | struct bitmap_super_s *bsb; | |
911 | ||
912 | ||
913 | if (st->ss == NULL) { | |
914 | int bestvers = -1; | |
915 | __u64 bestctime = 0; | |
916 | /* guess... choose latest ctime */ | |
917 | st->ss = &super1; | |
918 | for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) { | |
919 | switch(load_super1(st, fd, sbp, devname)) { | |
920 | case 0: super = *sbp; | |
921 | if (bestvers == -1 || | |
922 | bestctime < __le64_to_cpu(super->ctime)) { | |
923 | bestvers = st->minor_version; | |
924 | bestctime = __le64_to_cpu(super->ctime); | |
925 | } | |
926 | free(super); | |
927 | *sbp = NULL; | |
928 | break; | |
929 | case 1: st->ss = NULL; return 1; /*bad device */ | |
930 | case 2: break; /* bad, try next */ | |
931 | } | |
932 | } | |
933 | if (bestvers != -1) { | |
934 | int rv; | |
935 | st->minor_version = bestvers; | |
936 | st->ss = &super1; | |
937 | st->max_devs = 384; | |
938 | rv = load_super1(st, fd, sbp, devname); | |
939 | if (rv) st->ss = NULL; | |
940 | return rv; | |
941 | } | |
942 | st->ss = NULL; | |
943 | return 2; | |
944 | } | |
945 | #ifdef BLKGETSIZE64 | |
946 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
947 | #endif | |
948 | { | |
949 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
950 | if (devname) | |
951 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
952 | devname, strerror(errno)); | |
953 | return 1; | |
954 | } | |
955 | dsize = size; | |
956 | } else | |
957 | dsize >>= 9; | |
958 | ||
959 | if (dsize < 24) { | |
960 | if (devname) | |
961 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", | |
962 | devname, dsize); | |
963 | return 1; | |
964 | } | |
965 | ||
966 | /* | |
967 | * Calculate the position of the superblock. | |
968 | * It is always aligned to a 4K boundary and | |
969 | * depending on minor_version, it can be: | |
970 | * 0: At least 8K, but less than 12K, from end of device | |
971 | * 1: At start of device | |
972 | * 2: 4K from start of device. | |
973 | */ | |
974 | switch(st->minor_version) { | |
975 | case 0: | |
976 | sb_offset = dsize; | |
977 | sb_offset -= 8*2; | |
978 | sb_offset &= ~(4*2-1); | |
979 | break; | |
980 | case 1: | |
981 | sb_offset = 0; | |
982 | break; | |
983 | case 2: | |
984 | sb_offset = 4*2; | |
985 | break; | |
986 | default: | |
987 | return -EINVAL; | |
988 | } | |
989 | ||
990 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
991 | ||
992 | ||
993 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
994 | if (devname) | |
995 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
996 | devname, strerror(errno)); | |
997 | return 1; | |
998 | } | |
999 | ||
1000 | super = malloc(1024 + sizeof(bitmap_super_t)); | |
1001 | ||
1002 | if (read(fd, super, 1024) != 1024) { | |
1003 | if (devname) | |
1004 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
1005 | devname); | |
1006 | free(super); | |
1007 | return 1; | |
1008 | } | |
1009 | ||
1010 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
1011 | if (devname) | |
1012 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
1013 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
1014 | free(super); | |
1015 | return 2; | |
1016 | } | |
1017 | ||
1018 | if (__le32_to_cpu(super->major_version) != 1) { | |
1019 | if (devname) | |
1020 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
1021 | devname, __le32_to_cpu(super->major_version)); | |
1022 | free(super); | |
1023 | return 2; | |
1024 | } | |
1025 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
1026 | if (devname) | |
1027 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
1028 | devname); | |
1029 | free(super); | |
1030 | return 2; | |
1031 | } | |
1032 | *sbp = super; | |
1033 | ||
1034 | /* Now check on the bitmap superblock */ | |
1035 | if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0) | |
1036 | return 0; | |
1037 | /* Read the bitmap superblock and make sure it looks | |
1038 | * valid. If it doesn't clear the bit. An --assemble --force | |
1039 | * should get that written out. | |
1040 | */ | |
1041 | locate_bitmap1(st, fd, super); | |
1042 | if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s)) | |
1043 | != sizeof(struct bitmap_super_s)) | |
1044 | goto no_bitmap; | |
1045 | ||
1046 | uuid_from_super1(uuid, super); | |
1047 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1048 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
1049 | memcmp(bsb->uuid, uuid, 16) != 0) | |
1050 | goto no_bitmap; | |
1051 | return 0; | |
1052 | ||
1053 | no_bitmap: | |
1054 | super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1); | |
1055 | return 0; | |
1056 | } | |
1057 | ||
1058 | ||
1059 | static struct supertype *match_metadata_desc1(char *arg) | |
1060 | { | |
1061 | struct supertype *st = malloc(sizeof(*st)); | |
1062 | if (!st) return st; | |
1063 | ||
1064 | st->ss = &super1; | |
1065 | st->max_devs = 384; | |
1066 | if (strcmp(arg, "1") == 0 || | |
1067 | strcmp(arg, "1.0") == 0 || | |
1068 | strcmp(arg, "default/large") == 0) { | |
1069 | st->minor_version = 0; | |
1070 | return st; | |
1071 | } | |
1072 | if (strcmp(arg, "1.1") == 0) { | |
1073 | st->minor_version = 1; | |
1074 | return st; | |
1075 | } | |
1076 | if (strcmp(arg, "1.2") == 0) { | |
1077 | st->minor_version = 2; | |
1078 | return st; | |
1079 | } | |
1080 | ||
1081 | free(st); | |
1082 | return NULL; | |
1083 | } | |
1084 | ||
1085 | /* find available size on device with this devsize, using | |
1086 | * superblock type st, and reserving 'reserve' sectors for | |
1087 | * a possible bitmap | |
1088 | */ | |
1089 | static __u64 avail_size1(struct supertype *st, __u64 devsize) | |
1090 | { | |
1091 | if (devsize < 24) | |
1092 | return 0; | |
1093 | ||
1094 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, | |
1095 | * if bigger than 200Gig, save 128k | |
1096 | */ | |
1097 | if (devsize-64*2 >= 200*1024*1024*2) | |
1098 | devsize -= 128*2; | |
1099 | else if (devsize >= 8*1024*1024*2) | |
1100 | devsize -= 64*2; | |
1101 | ||
1102 | switch(st->minor_version) { | |
1103 | case 0: | |
1104 | /* at end */ | |
1105 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
1106 | case 1: | |
1107 | /* at start, 4K for superblock and possible bitmap */ | |
1108 | return devsize - 4*2; | |
1109 | case 2: | |
1110 | /* 4k from start, 4K for superblock and possible bitmap */ | |
1111 | return devsize - (4+4)*2; | |
1112 | } | |
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | static int | |
1117 | add_internal_bitmap1(struct supertype *st, void *sbv, | |
1118 | int *chunkp, int delay, int write_behind, | |
1119 | unsigned long long size, | |
1120 | int may_change, int major) | |
1121 | { | |
1122 | /* | |
1123 | * If not may_change, then this is a 'Grow', and the bitmap | |
1124 | * must fit after the superblock. | |
1125 | * If may_change, then this is create, and we can put the bitmap | |
1126 | * before the superblock if we like, or may move the start. | |
1127 | * If !may_change, the bitmap MUST live at offset of 1K, until | |
1128 | * we get a sysfs interface. | |
1129 | * | |
1130 | * size is in sectors, chunk is in bytes !!! | |
1131 | */ | |
1132 | ||
1133 | unsigned long long bits; | |
1134 | unsigned long long max_bits; | |
1135 | unsigned long long min_chunk; | |
1136 | long offset; | |
1137 | int chunk = *chunkp; | |
1138 | int room; | |
1139 | struct mdp_superblock_1 *sb = sbv; | |
1140 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
1141 | ||
1142 | switch(st->minor_version) { | |
1143 | case 0: | |
1144 | /* either 3K after the superblock, or some amount of space | |
1145 | * before. | |
1146 | */ | |
1147 | if (may_change) { | |
1148 | /* We are creating array, so we *know* how much room has | |
1149 | * been left. | |
1150 | */ | |
1151 | offset = 0; | |
1152 | if (__le64_to_cpu(sb->size) >= 200*1024*1024*2) | |
1153 | room = 128*2; | |
1154 | else if (__le64_to_cpu(sb->size) > 8*1024*1024*2) | |
1155 | room = 64*2; | |
1156 | else { | |
1157 | room = 3*2; | |
1158 | offset = 2; | |
1159 | } | |
1160 | } else { | |
1161 | room = __le64_to_cpu(sb->super_offset) | |
1162 | - __le64_to_cpu(sb->data_offset) | |
1163 | - __le64_to_cpu(sb->data_size); | |
1164 | /* remove '1 ||' when we can set offset via sysfs */ | |
1165 | if (1 || (room < 3*2 && | |
1166 | __le32_to_cpu(sb->max_dev) <= 384)) { | |
1167 | room = 3*2; | |
1168 | offset = 1*2; | |
1169 | } else { | |
1170 | offset = 0; /* means movable offset */ | |
1171 | } | |
1172 | } | |
1173 | break; | |
1174 | case 1: | |
1175 | case 2: /* between superblock and data */ | |
1176 | if (may_change) { | |
1177 | offset = 4*2; | |
1178 | if (__le64_to_cpu(sb->size) >= 200*1024*1024*2) | |
1179 | room = 128*2; | |
1180 | else if (__le64_to_cpu(sb->size) > 8*1024*1024*2) | |
1181 | room = 64*2; | |
1182 | else | |
1183 | room = 3*2; | |
1184 | } else { | |
1185 | room = __le64_to_cpu(sb->data_offset) | |
1186 | - __le64_to_cpu(sb->super_offset); | |
1187 | if (1 || __le32_to_cpu(sb->max_dev) <= 384) { | |
1188 | room -= 2; | |
1189 | offset = 2; | |
1190 | } else { | |
1191 | room -= 4*2; | |
1192 | offset = 4*2; | |
1193 | } | |
1194 | } | |
1195 | break; | |
1196 | } | |
1197 | ||
1198 | if (chunk == UnSet && room > 128*2) | |
1199 | /* Limit to 128K of bitmap when chunk size not requested */ | |
1200 | room = 128*2; | |
1201 | ||
1202 | max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8; | |
1203 | ||
1204 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
1205 | bits = (size*512)/min_chunk +1; | |
1206 | while (bits > max_bits) { | |
1207 | min_chunk *= 2; | |
1208 | bits = (bits+1)/2; | |
1209 | } | |
1210 | if (chunk == UnSet) | |
1211 | chunk = min_chunk; | |
1212 | else if (chunk < min_chunk) | |
1213 | return 0; /* chunk size too small */ | |
1214 | if (chunk == 0) /* rounding problem */ | |
1215 | return 0; | |
1216 | ||
1217 | if (offset == 0) { | |
1218 | bits = (size*512) / chunk + 1; | |
1219 | room = ((bits+7)/8 + sizeof(bitmap_super_t) +511)/512; | |
1220 | offset = -room; | |
1221 | } | |
1222 | ||
1223 | sb->bitmap_offset = __cpu_to_le32(offset); | |
1224 | ||
1225 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
1226 | memset(bms, 0, sizeof(*bms)); | |
1227 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); | |
1228 | bms->version = __cpu_to_le32(major); | |
1229 | uuid_from_super1((int*)bms->uuid, sb); | |
1230 | bms->chunksize = __cpu_to_le32(chunk); | |
1231 | bms->daemon_sleep = __cpu_to_le32(delay); | |
1232 | bms->sync_size = __cpu_to_le64(size); | |
1233 | bms->write_behind = __cpu_to_le32(write_behind); | |
1234 | ||
1235 | *chunkp = chunk; | |
1236 | return 1; | |
1237 | } | |
1238 | ||
1239 | ||
1240 | static void locate_bitmap1(struct supertype *st, int fd, void *sbv) | |
1241 | { | |
1242 | unsigned long long offset; | |
1243 | struct mdp_superblock_1 *sb; | |
1244 | int mustfree = 0; | |
1245 | ||
1246 | if (!sbv) { | |
1247 | if (st->ss->load_super(st, fd, &sbv, NULL)) | |
1248 | return; /* no error I hope... */ | |
1249 | mustfree = 1; | |
1250 | } | |
1251 | sb = sbv; | |
1252 | ||
1253 | offset = __le64_to_cpu(sb->super_offset); | |
1254 | offset += (long) __le32_to_cpu(sb->bitmap_offset); | |
1255 | if (mustfree) | |
1256 | free(sb); | |
1257 | lseek64(fd, offset<<9, 0); | |
1258 | } | |
1259 | ||
1260 | static int write_bitmap1(struct supertype *st, int fd, void *sbv) | |
1261 | { | |
1262 | struct mdp_superblock_1 *sb = sbv; | |
1263 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); | |
1264 | int rv = 0; | |
1265 | ||
1266 | int towrite, n; | |
1267 | char buf[4096]; | |
1268 | ||
1269 | locate_bitmap1(st, fd, sbv); | |
1270 | ||
1271 | if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) != | |
1272 | sizeof(bitmap_super_t)) | |
1273 | return -2; | |
1274 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); | |
1275 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
1276 | memset(buf, 0xff, sizeof(buf)); | |
1277 | while (towrite > 0) { | |
1278 | n = towrite; | |
1279 | if (n > sizeof(buf)) | |
1280 | n = sizeof(buf); | |
1281 | n = write(fd, buf, n); | |
1282 | if (n > 0) | |
1283 | towrite -= n; | |
1284 | else | |
1285 | break; | |
1286 | } | |
1287 | fsync(fd); | |
1288 | if (towrite) | |
1289 | rv = -2; | |
1290 | ||
1291 | return rv; | |
1292 | } | |
1293 | ||
1294 | struct superswitch super1 = { | |
1295 | #ifndef MDASSEMBLE | |
1296 | .examine_super = examine_super1, | |
1297 | .brief_examine_super = brief_examine_super1, | |
1298 | .detail_super = detail_super1, | |
1299 | .brief_detail_super = brief_detail_super1, | |
1300 | #endif | |
1301 | .match_home = match_home1, | |
1302 | .uuid_from_super = uuid_from_super1, | |
1303 | .getinfo_super = getinfo_super1, | |
1304 | .update_super = update_super1, | |
1305 | .init_super = init_super1, | |
1306 | .add_to_super = add_to_super1, | |
1307 | .store_super = store_super1, | |
1308 | .write_init_super = write_init_super1, | |
1309 | .compare_super = compare_super1, | |
1310 | .load_super = load_super1, | |
1311 | .match_metadata_desc = match_metadata_desc1, | |
1312 | .avail_size = avail_size1, | |
1313 | .add_internal_bitmap = add_internal_bitmap1, | |
1314 | .locate_bitmap = locate_bitmap1, | |
1315 | .write_bitmap = write_bitmap1, | |
1316 | .major = 1, | |
1317 | #if __BYTE_ORDER == BIG_ENDIAN | |
1318 | .swapuuid = 0, | |
1319 | #else | |
1320 | .swapuuid = 1, | |
1321 | #endif | |
1322 | }; |