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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) ((int)&(((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 | ||
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 | ||
138 | #ifndef MDASSEMBLE | |
139 | static void examine_super1(void *sbv, char *homehost) | |
140 | { | |
141 | struct mdp_superblock_1 *sb = sbv; | |
142 | time_t atime; | |
143 | int d; | |
144 | int faulty; | |
145 | int i; | |
146 | char *c; | |
147 | int l = homehost ? strlen(homehost) : 0; | |
148 | ||
149 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
150 | printf(" Version : %02d\n", 1); | |
151 | printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); | |
152 | printf(" Array UUID : "); | |
153 | for (i=0; i<16; i++) { | |
154 | if ((i&3)==0 && i != 0) printf(":"); | |
155 | printf("%02x", sb->set_uuid[i]); | |
156 | } | |
157 | printf("\n"); | |
158 | printf(" Name : %.32s", sb->set_name); | |
159 | if (l > 0 && l < 32 && | |
160 | sb->set_name[l] == ':' && | |
161 | strncmp(sb->set_name, homehost, l) == 0) | |
162 | printf(" (local to host %s)", homehost); | |
163 | printf("\n"); | |
164 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
165 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
166 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
167 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
168 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
169 | printf("\n"); | |
170 | printf(" Device Size : %llu%s\n", (unsigned long long)sb->data_size, human_size(sb->data_size<<9)); | |
171 | if (__le32_to_cpu(sb->level) >= 0) { | |
172 | int ddsks=0; | |
173 | switch(__le32_to_cpu(sb->level)) { | |
174 | case 1: ddsks=1;break; | |
175 | case 4: | |
176 | case 5: ddsks = sb->raid_disks-1; break; | |
177 | case 6: ddsks = sb->raid_disks-2; break; | |
178 | case 10: ddsks = sb->raid_disks / (sb->layout&255) / ((sb->layout>>8)&255); | |
179 | } | |
180 | if (ddsks) | |
181 | printf(" Array Size : %llu%s\n", ddsks*(unsigned long long)sb->size, human_size(ddsks*sb->size<<9)); | |
182 | if (sb->size != sb->data_size) | |
183 | printf(" Used Size : %llu%s\n", (unsigned long long)sb->size, human_size(sb->size<<9)); | |
184 | } | |
185 | if (sb->data_offset) | |
186 | printf(" Data Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->data_offset)); | |
187 | if (sb->super_offset) | |
188 | printf(" Super Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->super_offset)); | |
189 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) | |
190 | printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset)); | |
191 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); | |
192 | printf(" Device UUID : "); | |
193 | for (i=0; i<16; i++) { | |
194 | if ((i&3)==0 && i != 0) printf(":"); | |
195 | printf("%02x", sb->device_uuid[i]); | |
196 | } | |
197 | printf("\n"); | |
198 | printf("\n"); | |
199 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
200 | printf("Internal Bitmap : %ld sectors from superblock\n", | |
201 | (long)__le32_to_cpu(sb->bitmap_offset)); | |
202 | } | |
203 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
204 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2, | |
205 | human_size(__le64_to_cpu(sb->reshape_position)<<9)); | |
206 | if (__le32_to_cpu(sb->delta_disks)) { | |
207 | printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks)); | |
208 | if (__le32_to_cpu(sb->delta_disks)) | |
209 | printf(" (%d->%d)\n", | |
210 | __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks), | |
211 | __le32_to_cpu(sb->raid_disks)); | |
212 | else | |
213 | printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks), | |
214 | __le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks)); | |
215 | } | |
216 | if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { | |
217 | c = map_num(pers, __le32_to_cpu(sb->new_level)); | |
218 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
219 | } | |
220 | if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) { | |
221 | if (__le32_to_cpu(sb->level) == 5) { | |
222 | c = map_num(r5layout, __le32_to_cpu(sb->new_layout)); | |
223 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
224 | } | |
225 | if (__le32_to_cpu(sb->level) == 10) { | |
226 | printf(" New Layout : near=%d, %s=%d\n", | |
227 | __le32_to_cpu(sb->new_layout)&255, | |
228 | (__le32_to_cpu(sb->new_layout)&0x10000)?"offset":"far", | |
229 | (__le32_to_cpu(sb->new_layout)>>8)&255); | |
230 | } | |
231 | } | |
232 | if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) | |
233 | printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); | |
234 | printf("\n"); | |
235 | } | |
236 | if (sb->devflags) { | |
237 | printf(" Flags :"); | |
238 | if (sb->devflags & WriteMostly1) | |
239 | printf(" write-mostly"); | |
240 | printf("\n"); | |
241 | } | |
242 | ||
243 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
244 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
245 | ||
246 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
247 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
248 | else | |
249 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
250 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
251 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
252 | printf("\n"); | |
253 | if (__le32_to_cpu(sb->level) == 5) { | |
254 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
255 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
256 | } | |
257 | if (__le32_to_cpu(sb->level) == 10) { | |
258 | int lo = __le32_to_cpu(sb->layout); | |
259 | printf(" Layout : near=%d, %s=%d\n", | |
260 | lo&255, | |
261 | (lo&0x10000)?"offset":"far", | |
262 | (lo>>8)&255); | |
263 | } | |
264 | switch(__le32_to_cpu(sb->level)) { | |
265 | case 0: | |
266 | case 4: | |
267 | case 5: | |
268 | case 6: | |
269 | case 10: | |
270 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
271 | break; | |
272 | case -1: | |
273 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
274 | break; | |
275 | default: break; | |
276 | } | |
277 | printf("\n"); | |
278 | printf(" Array State : "); | |
279 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
280 | int cnt = 0; | |
281 | int me = 0; | |
282 | int i; | |
283 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
284 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
285 | if (role == d) { | |
286 | if (i == __le32_to_cpu(sb->dev_number)) | |
287 | me = 1; | |
288 | cnt++; | |
289 | } | |
290 | } | |
291 | if (cnt > 1) printf("?"); | |
292 | else if (cnt == 1 && me) printf("U"); | |
293 | else if (cnt == 1) printf("u"); | |
294 | else printf ("_"); | |
295 | } | |
296 | faulty = 0; | |
297 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
298 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
299 | if (role == 0xFFFE) | |
300 | faulty++; | |
301 | } | |
302 | if (faulty) printf(" %d failed", faulty); | |
303 | printf("\n"); | |
304 | } | |
305 | ||
306 | ||
307 | static void brief_examine_super1(void *sbv) | |
308 | { | |
309 | struct mdp_superblock_1 *sb = sbv; | |
310 | int i; | |
311 | char *nm; | |
312 | ||
313 | nm = strchr(sb->set_name, ':'); | |
314 | if (nm) | |
315 | nm++; | |
316 | else if (sb->set_name[0]) | |
317 | nm = sb->set_name; | |
318 | else | |
319 | nm = "??"; | |
320 | ||
321 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
322 | ||
323 | printf("ARRAY /dev/md/%s level=%s metadata=1 num-devices=%d UUID=", | |
324 | nm, | |
325 | c?c:"-unknown-", sb->raid_disks); | |
326 | for (i=0; i<16; i++) { | |
327 | printf("%02x", sb->set_uuid[i]); | |
328 | if ((i&3)==0 && i != 0) printf(":"); | |
329 | } | |
330 | if (sb->set_name[0]) | |
331 | printf(" name=%.32s", sb->set_name); | |
332 | printf("\n"); | |
333 | } | |
334 | ||
335 | static void detail_super1(void *sbv, char *homehost) | |
336 | { | |
337 | struct mdp_superblock_1 *sb = sbv; | |
338 | int i; | |
339 | int l = homehost ? strlen(homehost) : 0; | |
340 | ||
341 | printf(" Name : %.32s", sb->set_name); | |
342 | if (l > 0 && l < 32 && | |
343 | sb->set_name[l] == ':' && | |
344 | strncmp(sb->set_name, homehost, l) == 0) | |
345 | printf(" (local to host %s)", homehost); | |
346 | printf("\n UUID : "); | |
347 | for (i=0; i<16; i++) { | |
348 | if ((i&3)==0 && i != 0) printf(":"); | |
349 | printf("%02x", sb->set_uuid[i]); | |
350 | } | |
351 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
352 | } | |
353 | ||
354 | static void brief_detail_super1(void *sbv) | |
355 | { | |
356 | struct mdp_superblock_1 *sb = sbv; | |
357 | int i; | |
358 | ||
359 | if (sb->set_name[0]) | |
360 | printf(" name=%.32s", sb->set_name); | |
361 | printf(" UUID="); | |
362 | for (i=0; i<16; i++) { | |
363 | if ((i&3)==0 && i != 0) printf(":"); | |
364 | printf("%02x", sb->set_uuid[i]); | |
365 | } | |
366 | } | |
367 | ||
368 | #endif | |
369 | ||
370 | static int match_home1(void *sbv, char *homehost) | |
371 | { | |
372 | struct mdp_superblock_1 *sb = sbv; | |
373 | int l = homehost ? strlen(homehost) : 0; | |
374 | ||
375 | return (l > 0 && l < 32 && | |
376 | sb->set_name[l] == ':' && | |
377 | strncmp(sb->set_name, homehost, l) == 0); | |
378 | } | |
379 | ||
380 | static void uuid_from_super1(int uuid[4], void * sbv) | |
381 | { | |
382 | struct mdp_superblock_1 *super = sbv; | |
383 | char *cuuid = (char*)uuid; | |
384 | int i; | |
385 | for (i=0; i<16; i++) | |
386 | cuuid[i] = super->set_uuid[i]; | |
387 | } | |
388 | ||
389 | static void getinfo_super1(struct mdinfo *info, void *sbv) | |
390 | { | |
391 | struct mdp_superblock_1 *sb = sbv; | |
392 | int working = 0; | |
393 | int i; | |
394 | int role; | |
395 | ||
396 | info->array.major_version = 1; | |
397 | info->array.minor_version = __le32_to_cpu(sb->feature_map); | |
398 | info->array.patch_version = 0; | |
399 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
400 | info->array.level = __le32_to_cpu(sb->level); | |
401 | info->array.layout = __le32_to_cpu(sb->layout); | |
402 | info->array.md_minor = -1; | |
403 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
404 | info->array.utime = __le64_to_cpu(sb->utime); | |
405 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; | |
406 | ||
407 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
408 | info->component_size = __le64_to_cpu(sb->size); | |
409 | ||
410 | info->disk.major = 0; | |
411 | info->disk.minor = 0; | |
412 | info->disk.number = __le32_to_cpu(sb->dev_number); | |
413 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || | |
414 | __le32_to_cpu(sb->max_dev) > 512) | |
415 | role = 0xfffe; | |
416 | else | |
417 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
418 | ||
419 | info->disk.raid_disk = -1; | |
420 | switch(role) { | |
421 | case 0xFFFF: | |
422 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
423 | break; | |
424 | case 0xFFFE: | |
425 | info->disk.state = 1; /* faulty */ | |
426 | break; | |
427 | default: | |
428 | info->disk.state = 6; /* active and in sync */ | |
429 | info->disk.raid_disk = role; | |
430 | } | |
431 | info->events = __le64_to_cpu(sb->events); | |
432 | ||
433 | memcpy(info->uuid, sb->set_uuid, 16); | |
434 | ||
435 | strncpy(info->name, sb->set_name, 32); | |
436 | info->name[32] = 0; | |
437 | ||
438 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
439 | info->reshape_active = 1; | |
440 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
441 | info->new_level = __le32_to_cpu(sb->new_level); | |
442 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
443 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
444 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; | |
445 | } else | |
446 | info->reshape_active = 0; | |
447 | ||
448 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
449 | role = __le16_to_cpu(sb->dev_roles[i]); | |
450 | if (/*role == 0xFFFF || */role < info->array.raid_disks) | |
451 | working++; | |
452 | } | |
453 | ||
454 | info->array.working_disks = working; | |
455 | } | |
456 | ||
457 | static int update_super1(struct mdinfo *info, void *sbv, char *update, | |
458 | char *devname, int verbose, | |
459 | int uuid_set, char *homehost) | |
460 | { | |
461 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. | |
462 | * For others, the return value is ignored. | |
463 | */ | |
464 | int rv = 0; | |
465 | struct mdp_superblock_1 *sb = sbv; | |
466 | ||
467 | if (strcmp(update, "force")==0) { | |
468 | if (sb->events != __cpu_to_le64(info->events)) | |
469 | rv = 1; | |
470 | sb->events = __cpu_to_le64(info->events); | |
471 | switch(__le32_to_cpu(sb->level)) { | |
472 | case 5: case 4: case 6: | |
473 | /* need to force clean */ | |
474 | if (sb->resync_offset != ~0ULL) | |
475 | rv = 1; | |
476 | sb->resync_offset = ~0ULL; | |
477 | } | |
478 | } | |
479 | if (strcmp(update, "assemble")==0) { | |
480 | int d = info->disk.number; | |
481 | int want; | |
482 | if (info->disk.state == 6) | |
483 | want = __cpu_to_le32(info->disk.raid_disk); | |
484 | else | |
485 | want = 0xFFFF; | |
486 | if (sb->dev_roles[d] != want) { | |
487 | sb->dev_roles[d] = want; | |
488 | rv = 1; | |
489 | } | |
490 | } | |
491 | #if 0 | |
492 | if (strcmp(update, "newdev") == 0) { | |
493 | int d = info->disk.number; | |
494 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
495 | sb->disks[d].number = d; | |
496 | sb->disks[d].major = info->disk.major; | |
497 | sb->disks[d].minor = info->disk.minor; | |
498 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
499 | sb->disks[d].state = info->disk.state; | |
500 | sb->this_disk = sb->disks[d]; | |
501 | } | |
502 | #endif | |
503 | if (strcmp(update, "grow") == 0) { | |
504 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
505 | /* FIXME */ | |
506 | } | |
507 | if (strcmp(update, "resync") == 0) { | |
508 | /* make sure resync happens */ | |
509 | sb->resync_offset = ~0ULL; | |
510 | } | |
511 | if (strcmp(update, "uuid") == 0) { | |
512 | memcpy(sb->set_uuid, info->uuid, 16); | |
513 | if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
514 | struct bitmap_super_s *bm; | |
515 | bm = (struct bitmap_super_s*)(sbv+1024); | |
516 | memcpy(bm->uuid, info->uuid, 16); | |
517 | } | |
518 | } | |
519 | if (strcmp(update, "homehost") == 0 && | |
520 | homehost) { | |
521 | char *c; | |
522 | update = "name"; | |
523 | c = strchr(sb->set_name, ':'); | |
524 | if (c) | |
525 | strncpy(info->name, c+1, 31 - (c-sb->set_name)); | |
526 | else | |
527 | strncpy(info->name, sb->set_name, 32); | |
528 | info->name[33] = 0; | |
529 | } | |
530 | if (strcmp(update, "name") == 0) { | |
531 | if (info->name[0] == 0) | |
532 | sprintf(info->name, "%d", info->array.md_minor); | |
533 | memset(sb->set_name, 0, sizeof(sb->set_name)); | |
534 | if (homehost && | |
535 | strchr(info->name, ':') == NULL && | |
536 | strlen(homehost)+1+strlen(info->name) < 32) { | |
537 | strcpy(sb->set_name, homehost); | |
538 | strcat(sb->set_name, ":"); | |
539 | strcat(sb->set_name, info->name); | |
540 | } else | |
541 | strcpy(sb->set_name, info->name); | |
542 | } | |
543 | if (strcmp(update, "_reshape_progress")==0) | |
544 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
545 | ||
546 | sb->sb_csum = calc_sb_1_csum(sb); | |
547 | return rv; | |
548 | } | |
549 | ||
550 | ||
551 | static __u64 event_super1(void *sbv) | |
552 | { | |
553 | struct mdp_superblock_1 *sb = sbv; | |
554 | return __le64_to_cpu(sb->events); | |
555 | } | |
556 | ||
557 | static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info, | |
558 | unsigned long long size, char *name, char *homehost) | |
559 | { | |
560 | struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t)); | |
561 | int spares; | |
562 | int rfd; | |
563 | char defname[10]; | |
564 | memset(sb, 0, 1024); | |
565 | ||
566 | if (info->major_version == -1) { | |
567 | /* zeroing superblock */ | |
568 | *sbp = sb; | |
569 | return 0; | |
570 | } | |
571 | ||
572 | spares = info->working_disks - info->active_disks; | |
573 | if (info->raid_disks + spares > 384) { | |
574 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
575 | info->raid_disks , spares, 384); | |
576 | return 0; | |
577 | } | |
578 | ||
579 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
580 | sb->major_version = __cpu_to_le32(1); | |
581 | sb->feature_map = 0; | |
582 | sb->pad0 = 0; | |
583 | ||
584 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
585 | read(rfd, sb->set_uuid, 16) != 16) { | |
586 | *(__u32*)(sb->set_uuid) = random(); | |
587 | *(__u32*)(sb->set_uuid+4) = random(); | |
588 | *(__u32*)(sb->set_uuid+8) = random(); | |
589 | *(__u32*)(sb->set_uuid+12) = random(); | |
590 | } | |
591 | if (rfd >= 0) close(rfd); | |
592 | ||
593 | if (name == NULL || *name == 0) { | |
594 | sprintf(defname, "%d", info->md_minor); | |
595 | name = defname; | |
596 | } | |
597 | memset(sb->set_name, 0, 32); | |
598 | if (homehost && | |
599 | strchr(name, ':')== NULL && | |
600 | strlen(homehost)+1+strlen(name) < 32) { | |
601 | strcpy(sb->set_name, homehost); | |
602 | strcat(sb->set_name, ":"); | |
603 | strcat(sb->set_name, name); | |
604 | } else | |
605 | strcpy(sb->set_name, name); | |
606 | ||
607 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
608 | sb->level = __cpu_to_le32(info->level); | |
609 | sb->layout = __cpu_to_le32(info->layout); | |
610 | sb->size = __cpu_to_le64(size*2ULL); | |
611 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
612 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
613 | ||
614 | sb->data_offset = __cpu_to_le64(0); | |
615 | sb->data_size = __cpu_to_le64(0); | |
616 | sb->super_offset = __cpu_to_le64(0); | |
617 | sb->recovery_offset = __cpu_to_le64(0); | |
618 | ||
619 | sb->utime = sb->ctime; | |
620 | sb->events = __cpu_to_le64(1); | |
621 | if (info->state & (1<<MD_SB_CLEAN)) | |
622 | sb->resync_offset = ~0ULL; | |
623 | else | |
624 | sb->resync_offset = 0; | |
625 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ | |
626 | sizeof(sb->dev_roles[0])); | |
627 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
628 | ||
629 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
630 | ||
631 | *sbp = sb; | |
632 | return 1; | |
633 | } | |
634 | ||
635 | /* Add a device to the superblock being created */ | |
636 | static void add_to_super1(void *sbv, mdu_disk_info_t *dk) | |
637 | { | |
638 | struct mdp_superblock_1 *sb = sbv; | |
639 | __u16 *rp = sb->dev_roles + dk->number; | |
640 | if ((dk->state & 6) == 6) /* active, sync */ | |
641 | *rp = __cpu_to_le16(dk->raid_disk); | |
642 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ | |
643 | *rp = 0xffff; | |
644 | else | |
645 | *rp = 0xfffe; | |
646 | } | |
647 | ||
648 | static void locate_bitmap1(struct supertype *st, int fd, void *sbv); | |
649 | ||
650 | static int store_super1(struct supertype *st, int fd, void *sbv) | |
651 | { | |
652 | struct mdp_superblock_1 *sb = sbv; | |
653 | unsigned long long sb_offset; | |
654 | int sbsize; | |
655 | unsigned long size; | |
656 | unsigned long long dsize; | |
657 | ||
658 | #ifdef BLKGETSIZE64 | |
659 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
660 | #endif | |
661 | { | |
662 | if (ioctl(fd, BLKGETSIZE, &size)) | |
663 | return 1; | |
664 | else | |
665 | dsize = (unsigned long long)size; | |
666 | } else | |
667 | dsize >>= 9; | |
668 | ||
669 | if (dsize < 24) | |
670 | return 2; | |
671 | ||
672 | /* | |
673 | * Calculate the position of the superblock. | |
674 | * It is always aligned to a 4K boundary and | |
675 | * depending on minor_version, it can be: | |
676 | * 0: At least 8K, but less than 12K, from end of device | |
677 | * 1: At start of device | |
678 | * 2: 4K from start of device. | |
679 | */ | |
680 | switch(st->minor_version) { | |
681 | case 0: | |
682 | sb_offset = dsize; | |
683 | sb_offset -= 8*2; | |
684 | sb_offset &= ~(4*2-1); | |
685 | break; | |
686 | case 1: | |
687 | sb_offset = 0; | |
688 | break; | |
689 | case 2: | |
690 | sb_offset = 4*2; | |
691 | break; | |
692 | default: | |
693 | return -EINVAL; | |
694 | } | |
695 | ||
696 | ||
697 | ||
698 | if (sb_offset != __le64_to_cpu(sb->super_offset) && | |
699 | 0 != __le64_to_cpu(sb->super_offset) | |
700 | ) { | |
701 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
702 | abort(); | |
703 | } | |
704 | ||
705 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) | |
706 | return 3; | |
707 | ||
708 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
709 | ||
710 | if (write(fd, sb, sbsize) != sbsize) | |
711 | return 4; | |
712 | ||
713 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
714 | struct bitmap_super_s *bm = (struct bitmap_super_s*) | |
715 | (((char*)sb)+1024); | |
716 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { | |
717 | locate_bitmap1(st, fd, sbv); | |
718 | write(fd, bm, sizeof(*bm)); | |
719 | } | |
720 | } | |
721 | fsync(fd); | |
722 | return 0; | |
723 | } | |
724 | ||
725 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname); | |
726 | ||
727 | static int write_init_super1(struct supertype *st, void *sbv, | |
728 | mdu_disk_info_t *dinfo, char *devname) | |
729 | { | |
730 | struct mdp_superblock_1 *sb = sbv; | |
731 | void *refsbv = NULL; | |
732 | int fd = open(devname, O_RDWR | O_EXCL); | |
733 | int rfd; | |
734 | int rv; | |
735 | ||
736 | unsigned long size, space; | |
737 | unsigned long long dsize, array_size; | |
738 | long long sb_offset; | |
739 | ||
740 | ||
741 | if (fd < 0) { | |
742 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", | |
743 | devname); | |
744 | return -1; | |
745 | } | |
746 | ||
747 | sb->dev_number = __cpu_to_le32(dinfo->number); | |
748 | if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY)) | |
749 | sb->devflags |= WriteMostly1; | |
750 | ||
751 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
752 | read(rfd, sb->device_uuid, 16) != 16) { | |
753 | *(__u32*)(sb->device_uuid) = random(); | |
754 | *(__u32*)(sb->device_uuid+4) = random(); | |
755 | *(__u32*)(sb->device_uuid+8) = random(); | |
756 | *(__u32*)(sb->device_uuid+12) = random(); | |
757 | } | |
758 | if (rfd >= 0) close(rfd); | |
759 | sb->events = 0; | |
760 | ||
761 | if (load_super1(st, fd, &refsbv, NULL)==0) { | |
762 | struct mdp_superblock_1 *refsb = refsbv; | |
763 | ||
764 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
765 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
766 | /* same array, so preserve events and dev_number */ | |
767 | sb->events = refsb->events; | |
768 | sb->dev_number = refsb->dev_number; | |
769 | } | |
770 | free(refsb); | |
771 | } | |
772 | ||
773 | #ifdef BLKGETSIZE64 | |
774 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
775 | #endif | |
776 | { | |
777 | if (ioctl(fd, BLKGETSIZE, &size)) | |
778 | return 1; | |
779 | else | |
780 | dsize = size; | |
781 | } else | |
782 | dsize >>= 9; | |
783 | ||
784 | if (dsize < 24) { | |
785 | close(fd); | |
786 | return 2; | |
787 | } | |
788 | ||
789 | ||
790 | /* | |
791 | * Calculate the position of the superblock. | |
792 | * It is always aligned to a 4K boundary and | |
793 | * depending on minor_version, it can be: | |
794 | * 0: At least 8K, but less than 12K, from end of device | |
795 | * 1: At start of device | |
796 | * 2: 4K from start of device. | |
797 | * Depending on the array size, we might leave extra space | |
798 | * for a bitmap. | |
799 | */ | |
800 | array_size = __le64_to_cpu(sb->size); | |
801 | switch(st->minor_version) { | |
802 | case 0: | |
803 | sb_offset = dsize; | |
804 | sb_offset -= 8*2; | |
805 | sb_offset &= ~(4*2-1); | |
806 | sb->super_offset = __cpu_to_le64(sb_offset); | |
807 | sb->data_offset = __cpu_to_le64(0); | |
808 | if (sb_offset-64*2 >= array_size && array_size > 8*1024*1024*2) | |
809 | sb->data_size = __cpu_to_le64(sb_offset-64*2); | |
810 | else | |
811 | sb->data_size = __cpu_to_le64(sb_offset); | |
812 | break; | |
813 | case 1: | |
814 | sb->super_offset = __cpu_to_le64(0); | |
815 | if (dsize - 64*2 >= array_size && array_size > 8*1024*1024*2) | |
816 | space = 64*2; | |
817 | else | |
818 | space = 4*2; | |
819 | sb->data_offset = __cpu_to_le64(space); /* leave space for super and bitmap */ | |
820 | sb->data_size = __cpu_to_le64(dsize - space); | |
821 | break; | |
822 | case 2: | |
823 | sb_offset = 4*2; | |
824 | if (dsize - 4*2 - 64*2 >= array_size && array_size > 8*1024*1024*2) | |
825 | space = 64*2; | |
826 | else | |
827 | space = 4*2; | |
828 | sb->super_offset = __cpu_to_le64(sb_offset); | |
829 | sb->data_offset = __cpu_to_le64(sb_offset+space); | |
830 | sb->data_size = __cpu_to_le64(dsize - 4*2 - space); | |
831 | break; | |
832 | default: | |
833 | return -EINVAL; | |
834 | } | |
835 | ||
836 | ||
837 | sb->sb_csum = calc_sb_1_csum(sb); | |
838 | rv = store_super1(st, fd, sb); | |
839 | if (rv) | |
840 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
841 | ||
842 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) | |
843 | rv = st->ss->write_bitmap(st, fd, sbv); | |
844 | close(fd); | |
845 | return rv; | |
846 | } | |
847 | ||
848 | static int compare_super1(void **firstp, void *secondv) | |
849 | { | |
850 | /* | |
851 | * return: | |
852 | * 0 same, or first was empty, and second was copied | |
853 | * 1 second had wrong number | |
854 | * 2 wrong uuid | |
855 | * 3 wrong other info | |
856 | */ | |
857 | struct mdp_superblock_1 *first = *firstp; | |
858 | struct mdp_superblock_1 *second = secondv; | |
859 | ||
860 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
861 | return 1; | |
862 | if (second->major_version != __cpu_to_le32(1)) | |
863 | return 1; | |
864 | ||
865 | if (!first) { | |
866 | first = malloc(1024+sizeof(bitmap_super_t)); | |
867 | memcpy(first, second, 1024+sizeof(bitmap_super_t)); | |
868 | *firstp = first; | |
869 | return 0; | |
870 | } | |
871 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
872 | return 2; | |
873 | ||
874 | if (first->ctime != second->ctime || | |
875 | first->level != second->level || | |
876 | first->layout != second->layout || | |
877 | first->size != second->size || | |
878 | first->chunksize != second->chunksize || | |
879 | first->raid_disks != second->raid_disks) | |
880 | return 3; | |
881 | return 0; | |
882 | } | |
883 | ||
884 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname) | |
885 | { | |
886 | unsigned long size; | |
887 | unsigned long long dsize; | |
888 | unsigned long long sb_offset; | |
889 | struct mdp_superblock_1 *super; | |
890 | int uuid[4]; | |
891 | struct bitmap_super_s *bsb; | |
892 | ||
893 | ||
894 | if (st->ss == NULL) { | |
895 | int bestvers = -1; | |
896 | __u64 bestctime = 0; | |
897 | /* guess... choose latest ctime */ | |
898 | st->ss = &super1; | |
899 | for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) { | |
900 | switch(load_super1(st, fd, sbp, devname)) { | |
901 | case 0: super = *sbp; | |
902 | if (bestvers == -1 || | |
903 | bestctime < __le64_to_cpu(super->ctime)) { | |
904 | bestvers = st->minor_version; | |
905 | bestctime = __le64_to_cpu(super->ctime); | |
906 | } | |
907 | free(super); | |
908 | *sbp = NULL; | |
909 | break; | |
910 | case 1: st->ss = NULL; return 1; /*bad device */ | |
911 | case 2: break; /* bad, try next */ | |
912 | } | |
913 | } | |
914 | if (bestvers != -1) { | |
915 | int rv; | |
916 | st->minor_version = bestvers; | |
917 | st->ss = &super1; | |
918 | st->max_devs = 384; | |
919 | rv = load_super1(st, fd, sbp, devname); | |
920 | if (rv) st->ss = NULL; | |
921 | return rv; | |
922 | } | |
923 | st->ss = NULL; | |
924 | return 2; | |
925 | } | |
926 | #ifdef BLKGETSIZE64 | |
927 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
928 | #endif | |
929 | { | |
930 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
931 | if (devname) | |
932 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
933 | devname, strerror(errno)); | |
934 | return 1; | |
935 | } | |
936 | dsize = size; | |
937 | } else | |
938 | dsize >>= 9; | |
939 | ||
940 | if (dsize < 24) { | |
941 | if (devname) | |
942 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", | |
943 | devname, dsize); | |
944 | return 1; | |
945 | } | |
946 | ||
947 | /* | |
948 | * Calculate the position of the superblock. | |
949 | * It is always aligned to a 4K boundary and | |
950 | * depending on minor_version, it can be: | |
951 | * 0: At least 8K, but less than 12K, from end of device | |
952 | * 1: At start of device | |
953 | * 2: 4K from start of device. | |
954 | */ | |
955 | switch(st->minor_version) { | |
956 | case 0: | |
957 | sb_offset = dsize; | |
958 | sb_offset -= 8*2; | |
959 | sb_offset &= ~(4*2-1); | |
960 | break; | |
961 | case 1: | |
962 | sb_offset = 0; | |
963 | break; | |
964 | case 2: | |
965 | sb_offset = 4*2; | |
966 | break; | |
967 | default: | |
968 | return -EINVAL; | |
969 | } | |
970 | ||
971 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
972 | ||
973 | ||
974 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
975 | if (devname) | |
976 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
977 | devname, strerror(errno)); | |
978 | return 1; | |
979 | } | |
980 | ||
981 | super = malloc(1024 + sizeof(bitmap_super_t)); | |
982 | ||
983 | if (read(fd, super, 1024) != 1024) { | |
984 | if (devname) | |
985 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
986 | devname); | |
987 | free(super); | |
988 | return 1; | |
989 | } | |
990 | ||
991 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
992 | if (devname) | |
993 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
994 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
995 | free(super); | |
996 | return 2; | |
997 | } | |
998 | ||
999 | if (__le32_to_cpu(super->major_version) != 1) { | |
1000 | if (devname) | |
1001 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
1002 | devname, __le32_to_cpu(super->major_version)); | |
1003 | free(super); | |
1004 | return 2; | |
1005 | } | |
1006 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
1007 | if (devname) | |
1008 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
1009 | devname); | |
1010 | free(super); | |
1011 | return 2; | |
1012 | } | |
1013 | *sbp = super; | |
1014 | ||
1015 | /* Now check on the bitmap superblock */ | |
1016 | if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0) | |
1017 | return 0; | |
1018 | /* Read the bitmap superblock and make sure it looks | |
1019 | * valid. If it doesn't clear the bit. An --assemble --force | |
1020 | * should get that written out. | |
1021 | */ | |
1022 | locate_bitmap1(st, fd, super); | |
1023 | if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s)) | |
1024 | != sizeof(struct bitmap_super_s)) | |
1025 | goto no_bitmap; | |
1026 | ||
1027 | uuid_from_super1(uuid, super); | |
1028 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1029 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
1030 | memcmp(bsb->uuid, uuid, 16) != 0) | |
1031 | goto no_bitmap; | |
1032 | return 0; | |
1033 | ||
1034 | no_bitmap: | |
1035 | super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1); | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | ||
1040 | static struct supertype *match_metadata_desc1(char *arg) | |
1041 | { | |
1042 | struct supertype *st = malloc(sizeof(*st)); | |
1043 | if (!st) return st; | |
1044 | ||
1045 | st->ss = &super1; | |
1046 | st->max_devs = 384; | |
1047 | if (strcmp(arg, "1") == 0 || | |
1048 | strcmp(arg, "1.0") == 0 || | |
1049 | strcmp(arg, "default/large") == 0) { | |
1050 | st->minor_version = 0; | |
1051 | return st; | |
1052 | } | |
1053 | if (strcmp(arg, "1.1") == 0) { | |
1054 | st->minor_version = 1; | |
1055 | return st; | |
1056 | } | |
1057 | if (strcmp(arg, "1.2") == 0) { | |
1058 | st->minor_version = 2; | |
1059 | return st; | |
1060 | } | |
1061 | ||
1062 | free(st); | |
1063 | return NULL; | |
1064 | } | |
1065 | ||
1066 | /* find available size on device with this devsize, using | |
1067 | * superblock type st, and reserving 'reserve' sectors for | |
1068 | * a possible bitmap | |
1069 | */ | |
1070 | static __u64 avail_size1(struct supertype *st, __u64 devsize) | |
1071 | { | |
1072 | if (devsize < 24) | |
1073 | return 0; | |
1074 | ||
1075 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, | |
1076 | * if biffer than 200Gig, save 128k | |
1077 | */ | |
1078 | if (devsize > 200*1024*1024*2) | |
1079 | devsize -= 128*2; | |
1080 | else if (devsize > 8*1024*1024*2) | |
1081 | devsize -= 64*2; | |
1082 | ||
1083 | switch(st->minor_version) { | |
1084 | case 0: | |
1085 | /* at end */ | |
1086 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
1087 | case 1: | |
1088 | /* at start, 4K for superblock and possible bitmap */ | |
1089 | return devsize - 4*2; | |
1090 | case 2: | |
1091 | /* 4k from start, 4K for superblock and possible bitmap */ | |
1092 | return devsize - (4+4)*2; | |
1093 | } | |
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | static int | |
1098 | add_internal_bitmap1(struct supertype *st, void *sbv, | |
1099 | int chunk, int delay, int write_behind, unsigned long long size, | |
1100 | int may_change, int major) | |
1101 | { | |
1102 | /* | |
1103 | * If not may_change, then this is a 'Grow', and the bitmap | |
1104 | * must fit after the superblock. | |
1105 | * If may_change, then this is create, and we can put the bitmap | |
1106 | * before the superblock if we like, or may move the start. | |
1107 | * For now, just squeeze the bitmap into 3k and don't change anything. | |
1108 | * | |
1109 | * size is in sectors, chunk is in bytes !!! | |
1110 | */ | |
1111 | ||
1112 | unsigned long long bits; | |
1113 | unsigned long long max_bits = (3*512 - sizeof(bitmap_super_t)) * 8; | |
1114 | unsigned long long min_chunk; | |
1115 | struct mdp_superblock_1 *sb = sbv; | |
1116 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
1117 | ||
1118 | if (st->minor_version && !may_change && | |
1119 | __le64_to_cpu(sb->data_offset) - __le64_to_cpu(sb->super_offset) < 8) | |
1120 | return 0; /* doesn't fit */ | |
1121 | ||
1122 | ||
1123 | ||
1124 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
1125 | bits = (size*512)/min_chunk +1; | |
1126 | while (bits > max_bits) { | |
1127 | min_chunk *= 2; | |
1128 | bits = (bits+1)/2; | |
1129 | } | |
1130 | if (chunk == UnSet) | |
1131 | chunk = min_chunk; | |
1132 | else if (chunk < min_chunk) | |
1133 | return 0; /* chunk size too small */ | |
1134 | if (chunk == 0) /* rounding problem */ | |
1135 | return 0; | |
1136 | ||
1137 | sb->bitmap_offset = __cpu_to_le32(2); | |
1138 | ||
1139 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
1140 | memset(bms, 0, sizeof(*bms)); | |
1141 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); | |
1142 | bms->version = __cpu_to_le32(major); | |
1143 | uuid_from_super1((int*)bms->uuid, sb); | |
1144 | bms->chunksize = __cpu_to_le32(chunk); | |
1145 | bms->daemon_sleep = __cpu_to_le32(delay); | |
1146 | bms->sync_size = __cpu_to_le64(size); | |
1147 | bms->write_behind = __cpu_to_le32(write_behind); | |
1148 | ||
1149 | return 1; | |
1150 | } | |
1151 | ||
1152 | ||
1153 | static void locate_bitmap1(struct supertype *st, int fd, void *sbv) | |
1154 | { | |
1155 | unsigned long long offset; | |
1156 | struct mdp_superblock_1 *sb; | |
1157 | int mustfree = 0; | |
1158 | ||
1159 | if (!sbv) { | |
1160 | if (st->ss->load_super(st, fd, &sbv, NULL)) | |
1161 | return; /* no error I hope... */ | |
1162 | mustfree = 1; | |
1163 | } | |
1164 | sb = sbv; | |
1165 | ||
1166 | offset = __le64_to_cpu(sb->super_offset); | |
1167 | offset += (long) __le32_to_cpu(sb->bitmap_offset); | |
1168 | if (mustfree) | |
1169 | free(sb); | |
1170 | lseek64(fd, offset<<9, 0); | |
1171 | } | |
1172 | ||
1173 | static int write_bitmap1(struct supertype *st, int fd, void *sbv) | |
1174 | { | |
1175 | struct mdp_superblock_1 *sb = sbv; | |
1176 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); | |
1177 | int rv = 0; | |
1178 | ||
1179 | int towrite, n; | |
1180 | char buf[4096]; | |
1181 | ||
1182 | locate_bitmap1(st, fd, sbv); | |
1183 | ||
1184 | if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) != | |
1185 | sizeof(bitmap_super_t)) | |
1186 | return -2; | |
1187 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); | |
1188 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
1189 | memset(buf, 0xff, sizeof(buf)); | |
1190 | while (towrite > 0) { | |
1191 | n = towrite; | |
1192 | if (n > sizeof(buf)) | |
1193 | n = sizeof(buf); | |
1194 | n = write(fd, buf, n); | |
1195 | if (n > 0) | |
1196 | towrite -= n; | |
1197 | else | |
1198 | break; | |
1199 | } | |
1200 | fsync(fd); | |
1201 | if (towrite) | |
1202 | rv = -2; | |
1203 | ||
1204 | return rv; | |
1205 | } | |
1206 | ||
1207 | struct superswitch super1 = { | |
1208 | #ifndef MDASSEMBLE | |
1209 | .examine_super = examine_super1, | |
1210 | .brief_examine_super = brief_examine_super1, | |
1211 | .detail_super = detail_super1, | |
1212 | .brief_detail_super = brief_detail_super1, | |
1213 | #endif | |
1214 | .match_home = match_home1, | |
1215 | .uuid_from_super = uuid_from_super1, | |
1216 | .getinfo_super = getinfo_super1, | |
1217 | .update_super = update_super1, | |
1218 | .event_super = event_super1, | |
1219 | .init_super = init_super1, | |
1220 | .add_to_super = add_to_super1, | |
1221 | .store_super = store_super1, | |
1222 | .write_init_super = write_init_super1, | |
1223 | .compare_super = compare_super1, | |
1224 | .load_super = load_super1, | |
1225 | .match_metadata_desc = match_metadata_desc1, | |
1226 | .avail_size = avail_size1, | |
1227 | .add_internal_bitmap = add_internal_bitmap1, | |
1228 | .locate_bitmap = locate_bitmap1, | |
1229 | .write_bitmap = write_bitmap1, | |
1230 | .major = 1, | |
1231 | #if __BYTE_ORDER == BIG_ENDIAN | |
1232 | .swapuuid = 0, | |
1233 | #else | |
1234 | .swapuuid = 1, | |
1235 | #endif | |
1236 | }; |