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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 | struct misc_dev_info { | |
98 | __u64 device_size; | |
99 | }; | |
100 | ||
101 | /* feature_map bits */ | |
102 | #define MD_FEATURE_BITMAP_OFFSET 1 | |
103 | #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and | |
104 | * must be honoured | |
105 | */ | |
106 | #define MD_FEATURE_RESHAPE_ACTIVE 4 | |
107 | ||
108 | #define MD_FEATURE_ALL (1|2|4) | |
109 | ||
110 | #ifndef offsetof | |
111 | #define offsetof(t,f) ((size_t)&(((t*)0)->f)) | |
112 | #endif | |
113 | static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb) | |
114 | { | |
115 | unsigned int disk_csum, csum; | |
116 | unsigned long long newcsum; | |
117 | int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2; | |
118 | unsigned int *isuper = (unsigned int*)sb; | |
119 | int i; | |
120 | ||
121 | /* make sure I can count... */ | |
122 | if (offsetof(struct mdp_superblock_1,data_offset) != 128 || | |
123 | offsetof(struct mdp_superblock_1, utime) != 192 || | |
124 | sizeof(struct mdp_superblock_1) != 256) { | |
125 | fprintf(stderr, "WARNING - superblock isn't sized correctly\n"); | |
126 | } | |
127 | ||
128 | disk_csum = sb->sb_csum; | |
129 | sb->sb_csum = 0; | |
130 | newcsum = 0; | |
131 | for (i=0; size>=4; size -= 4 ) { | |
132 | newcsum += __le32_to_cpu(*isuper); | |
133 | isuper++; | |
134 | } | |
135 | ||
136 | if (size == 2) | |
137 | newcsum += __le16_to_cpu(*(unsigned short*) isuper); | |
138 | ||
139 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
140 | sb->sb_csum = disk_csum; | |
141 | return __cpu_to_le32(csum); | |
142 | } | |
143 | ||
144 | #ifndef MDASSEMBLE | |
145 | static void examine_super1(struct supertype *st, char *homehost) | |
146 | { | |
147 | struct mdp_superblock_1 *sb = st->sb; | |
148 | time_t atime; | |
149 | int d; | |
150 | int faulty; | |
151 | int i; | |
152 | char *c; | |
153 | int l = homehost ? strlen(homehost) : 0; | |
154 | int layout; | |
155 | unsigned long long sb_offset; | |
156 | ||
157 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
158 | printf(" Version : 1"); | |
159 | sb_offset = __le64_to_cpu(sb->super_offset); | |
160 | if (sb_offset <= 4) | |
161 | printf(".1\n"); | |
162 | else if (sb_offset <= 8) | |
163 | printf(".2\n"); | |
164 | else | |
165 | printf(".0\n"); | |
166 | printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); | |
167 | printf(" Array UUID : "); | |
168 | for (i=0; i<16; i++) { | |
169 | if ((i&3)==0 && i != 0) printf(":"); | |
170 | printf("%02x", sb->set_uuid[i]); | |
171 | } | |
172 | printf("\n"); | |
173 | printf(" Name : %.32s", sb->set_name); | |
174 | if (l > 0 && l < 32 && | |
175 | sb->set_name[l] == ':' && | |
176 | strncmp(sb->set_name, homehost, l) == 0) | |
177 | printf(" (local to host %s)", homehost); | |
178 | printf("\n"); | |
179 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
180 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
181 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
182 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
183 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
184 | printf("\n"); | |
185 | printf(" Avail Dev Size : %llu%s\n", | |
186 | (unsigned long long)__le64_to_cpu(sb->data_size), | |
187 | human_size(__le64_to_cpu(sb->data_size)<<9)); | |
188 | if (__le32_to_cpu(sb->level) >= 0) { | |
189 | int ddsks=0; | |
190 | switch(__le32_to_cpu(sb->level)) { | |
191 | case 1: ddsks=1;break; | |
192 | case 4: | |
193 | case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break; | |
194 | case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break; | |
195 | case 10: | |
196 | layout = __le32_to_cpu(sb->layout); | |
197 | ddsks = __le32_to_cpu(sb->raid_disks) | |
198 | / (layout&255) / ((layout>>8)&255); | |
199 | } | |
200 | if (ddsks) | |
201 | printf(" Array Size : %llu%s\n", | |
202 | ddsks*(unsigned long long)__le64_to_cpu(sb->size), | |
203 | human_size(ddsks*__le64_to_cpu(sb->size)<<9)); | |
204 | if (sb->size != sb->data_size) | |
205 | printf(" Used Dev Size : %llu%s\n", | |
206 | (unsigned long long)__le64_to_cpu(sb->size), | |
207 | human_size(__le64_to_cpu(sb->size)<<9)); | |
208 | } | |
209 | if (sb->data_offset) | |
210 | printf(" Data Offset : %llu sectors\n", | |
211 | (unsigned long long)__le64_to_cpu(sb->data_offset)); | |
212 | printf(" Super Offset : %llu sectors\n", | |
213 | (unsigned long long)__le64_to_cpu(sb->super_offset)); | |
214 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) | |
215 | printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset)); | |
216 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); | |
217 | printf(" Device UUID : "); | |
218 | for (i=0; i<16; i++) { | |
219 | if ((i&3)==0 && i != 0) printf(":"); | |
220 | printf("%02x", sb->device_uuid[i]); | |
221 | } | |
222 | printf("\n"); | |
223 | printf("\n"); | |
224 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
225 | printf("Internal Bitmap : %ld sectors from superblock\n", | |
226 | (long)(int32_t)__le32_to_cpu(sb->bitmap_offset)); | |
227 | } | |
228 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
229 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2, | |
230 | human_size(__le64_to_cpu(sb->reshape_position)<<9)); | |
231 | if (__le32_to_cpu(sb->delta_disks)) { | |
232 | printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks)); | |
233 | if (__le32_to_cpu(sb->delta_disks)) | |
234 | printf(" (%d->%d)\n", | |
235 | __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks), | |
236 | __le32_to_cpu(sb->raid_disks)); | |
237 | else | |
238 | printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks), | |
239 | __le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks)); | |
240 | } | |
241 | if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { | |
242 | c = map_num(pers, __le32_to_cpu(sb->new_level)); | |
243 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
244 | } | |
245 | if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) { | |
246 | if (__le32_to_cpu(sb->level) == 5) { | |
247 | c = map_num(r5layout, __le32_to_cpu(sb->new_layout)); | |
248 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
249 | } | |
250 | if (__le32_to_cpu(sb->level) == 10) { | |
251 | printf(" New Layout :"); | |
252 | print_r10_layout(__le32_to_cpu(sb->new_layout)); | |
253 | printf("\n"); | |
254 | } | |
255 | } | |
256 | if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) | |
257 | printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); | |
258 | printf("\n"); | |
259 | } | |
260 | if (sb->devflags) { | |
261 | printf(" Flags :"); | |
262 | if (sb->devflags & WriteMostly1) | |
263 | printf(" write-mostly"); | |
264 | printf("\n"); | |
265 | } | |
266 | ||
267 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
268 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
269 | ||
270 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
271 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
272 | else | |
273 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
274 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
275 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
276 | printf("\n"); | |
277 | if (__le32_to_cpu(sb->level) == 5) { | |
278 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
279 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
280 | } | |
281 | if (__le32_to_cpu(sb->level) == 10) { | |
282 | int lo = __le32_to_cpu(sb->layout); | |
283 | printf(" Layout :"); | |
284 | print_r10_layout(lo); | |
285 | printf("\n"); | |
286 | } | |
287 | switch(__le32_to_cpu(sb->level)) { | |
288 | case 0: | |
289 | case 4: | |
290 | case 5: | |
291 | case 6: | |
292 | case 10: | |
293 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
294 | break; | |
295 | case -1: | |
296 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
297 | break; | |
298 | default: break; | |
299 | } | |
300 | printf("\n"); | |
301 | printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number)); | |
302 | for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--) | |
303 | if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff) | |
304 | break; | |
305 | for (d=0; d < i; d++) { | |
306 | int role = __le16_to_cpu(sb->dev_roles[d]); | |
307 | if (d) printf(", "); | |
308 | if (role == 0xffff) printf("empty"); | |
309 | else if(role == 0xfffe) printf("failed"); | |
310 | else printf("%d", role); | |
311 | } | |
312 | printf(")\n"); | |
313 | printf(" Array State : "); | |
314 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
315 | int cnt = 0; | |
316 | int me = 0; | |
317 | int i; | |
318 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
319 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
320 | if (role == d) { | |
321 | if (i == __le32_to_cpu(sb->dev_number)) | |
322 | me = 1; | |
323 | cnt++; | |
324 | } | |
325 | } | |
326 | if (cnt > 1) printf("?"); | |
327 | else if (cnt == 1 && me) printf("U"); | |
328 | else if (cnt == 1) printf("u"); | |
329 | else printf ("_"); | |
330 | } | |
331 | faulty = 0; | |
332 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
333 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
334 | if (role == 0xFFFE) | |
335 | faulty++; | |
336 | } | |
337 | if (faulty) printf(" %d failed", faulty); | |
338 | printf("\n"); | |
339 | } | |
340 | ||
341 | ||
342 | static void brief_examine_super1(struct supertype *st) | |
343 | { | |
344 | struct mdp_superblock_1 *sb = st->sb; | |
345 | int i; | |
346 | unsigned long long sb_offset; | |
347 | char *nm; | |
348 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
349 | ||
350 | nm = strchr(sb->set_name, ':'); | |
351 | if (nm) | |
352 | nm++; | |
353 | else if (sb->set_name[0]) | |
354 | nm = sb->set_name; | |
355 | else | |
356 | nm = NULL; | |
357 | ||
358 | printf("ARRAY%s%s level=%s ", | |
359 | nm ? " /dev/md/":"", nm, | |
360 | c?c:"-unknown-"); | |
361 | sb_offset = __le64_to_cpu(sb->super_offset); | |
362 | if (sb_offset <= 4) | |
363 | printf("metadata=1.1 "); | |
364 | else if (sb_offset <= 8) | |
365 | printf("metadata=1.2 "); | |
366 | else | |
367 | printf("metadata=1.0 "); | |
368 | printf("num-devices=%d UUID=", __le32_to_cpu(sb->raid_disks)); | |
369 | for (i=0; i<16; i++) { | |
370 | if ((i&3)==0 && i != 0) printf(":"); | |
371 | printf("%02x", sb->set_uuid[i]); | |
372 | } | |
373 | if (sb->set_name[0]) | |
374 | printf(" name=%.32s", sb->set_name); | |
375 | printf("\n"); | |
376 | } | |
377 | ||
378 | static void export_examine_super1(struct supertype *st) | |
379 | { | |
380 | struct mdp_superblock_1 *sb = st->sb; | |
381 | int i; | |
382 | int len = 32; | |
383 | ||
384 | printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level))); | |
385 | printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks)); | |
386 | for (i=0; i<32; i++) | |
387 | if (sb->set_name[i] == '\n' || | |
388 | sb->set_name[i] == '\0') { | |
389 | len = i; | |
390 | break; | |
391 | } | |
392 | if (len) | |
393 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
394 | printf("MD_UUID="); | |
395 | for (i=0; i<16; i++) { | |
396 | if ((i&3)==0 && i != 0) printf(":"); | |
397 | printf("%02x", sb->set_uuid[i]); | |
398 | } | |
399 | printf("\n"); | |
400 | printf("MD_UPDATE_TIME=%llu\n", | |
401 | __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL); | |
402 | printf("MD_DEV_UUID="); | |
403 | for (i=0; i<16; i++) { | |
404 | if ((i&3)==0 && i != 0) printf(":"); | |
405 | printf("%02x", sb->device_uuid[i]); | |
406 | } | |
407 | printf("\n"); | |
408 | printf("MD_EVENTS=%llu\n", | |
409 | (unsigned long long)__le64_to_cpu(sb->events)); | |
410 | } | |
411 | ||
412 | static void detail_super1(struct supertype *st, char *homehost) | |
413 | { | |
414 | struct mdp_superblock_1 *sb = st->sb; | |
415 | int i; | |
416 | int l = homehost ? strlen(homehost) : 0; | |
417 | ||
418 | printf(" Name : %.32s", sb->set_name); | |
419 | if (l > 0 && l < 32 && | |
420 | sb->set_name[l] == ':' && | |
421 | strncmp(sb->set_name, homehost, l) == 0) | |
422 | printf(" (local to host %s)", homehost); | |
423 | printf("\n UUID : "); | |
424 | for (i=0; i<16; i++) { | |
425 | if ((i&3)==0 && i != 0) printf(":"); | |
426 | printf("%02x", sb->set_uuid[i]); | |
427 | } | |
428 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
429 | } | |
430 | ||
431 | static void brief_detail_super1(struct supertype *st) | |
432 | { | |
433 | struct mdp_superblock_1 *sb = st->sb; | |
434 | int i; | |
435 | ||
436 | if (sb->set_name[0]) | |
437 | printf(" name=%.32s", sb->set_name); | |
438 | printf(" UUID="); | |
439 | for (i=0; i<16; i++) { | |
440 | if ((i&3)==0 && i != 0) printf(":"); | |
441 | printf("%02x", sb->set_uuid[i]); | |
442 | } | |
443 | } | |
444 | ||
445 | static void export_detail_super1(struct supertype *st) | |
446 | { | |
447 | struct mdp_superblock_1 *sb = st->sb; | |
448 | int i; | |
449 | int len = 32; | |
450 | ||
451 | for (i=0; i<32; i++) | |
452 | if (sb->set_name[i] == '\n' || | |
453 | sb->set_name[i] == '\0') { | |
454 | len = i; | |
455 | break; | |
456 | } | |
457 | if (len) | |
458 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
459 | } | |
460 | ||
461 | #endif | |
462 | ||
463 | static int match_home1(struct supertype *st, char *homehost) | |
464 | { | |
465 | struct mdp_superblock_1 *sb = st->sb; | |
466 | int l = homehost ? strlen(homehost) : 0; | |
467 | ||
468 | return (l > 0 && l < 32 && | |
469 | sb->set_name[l] == ':' && | |
470 | strncmp(sb->set_name, homehost, l) == 0); | |
471 | } | |
472 | ||
473 | static void uuid_from_super1(struct supertype *st, int uuid[4]) | |
474 | { | |
475 | struct mdp_superblock_1 *super = st->sb; | |
476 | char *cuuid = (char*)uuid; | |
477 | int i; | |
478 | for (i=0; i<16; i++) | |
479 | cuuid[i] = super->set_uuid[i]; | |
480 | } | |
481 | ||
482 | static void getinfo_super1(struct supertype *st, struct mdinfo *info) | |
483 | { | |
484 | struct mdp_superblock_1 *sb = st->sb; | |
485 | int working = 0; | |
486 | int i; | |
487 | int role; | |
488 | ||
489 | info->array.major_version = 1; | |
490 | info->array.minor_version = st->minor_version; | |
491 | info->array.patch_version = 0; | |
492 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
493 | info->array.level = __le32_to_cpu(sb->level); | |
494 | info->array.layout = __le32_to_cpu(sb->layout); | |
495 | info->array.md_minor = -1; | |
496 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
497 | info->array.utime = __le64_to_cpu(sb->utime); | |
498 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; | |
499 | info->array.state = | |
500 | (__le64_to_cpu(sb->resync_offset) >= __le64_to_cpu(sb->size)) | |
501 | ? 1 : 0; | |
502 | ||
503 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
504 | info->component_size = __le64_to_cpu(sb->size); | |
505 | ||
506 | info->disk.major = 0; | |
507 | info->disk.minor = 0; | |
508 | info->disk.number = __le32_to_cpu(sb->dev_number); | |
509 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || | |
510 | __le32_to_cpu(sb->max_dev) > 512) | |
511 | role = 0xfffe; | |
512 | else | |
513 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
514 | ||
515 | info->disk.raid_disk = -1; | |
516 | switch(role) { | |
517 | case 0xFFFF: | |
518 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
519 | break; | |
520 | case 0xFFFE: | |
521 | info->disk.state = 1; /* faulty */ | |
522 | break; | |
523 | default: | |
524 | info->disk.state = 6; /* active and in sync */ | |
525 | info->disk.raid_disk = role; | |
526 | } | |
527 | info->events = __le64_to_cpu(sb->events); | |
528 | sprintf(info->text_version, "1.%d", st->minor_version); | |
529 | info->safe_mode_delay = 200; | |
530 | ||
531 | memcpy(info->uuid, sb->set_uuid, 16); | |
532 | ||
533 | strncpy(info->name, sb->set_name, 32); | |
534 | info->name[32] = 0; | |
535 | ||
536 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
537 | info->reshape_active = 1; | |
538 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
539 | info->new_level = __le32_to_cpu(sb->new_level); | |
540 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
541 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
542 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; | |
543 | } else | |
544 | info->reshape_active = 0; | |
545 | ||
546 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
547 | role = __le16_to_cpu(sb->dev_roles[i]); | |
548 | if (/*role == 0xFFFF || */role < info->array.raid_disks) | |
549 | working++; | |
550 | } | |
551 | ||
552 | info->array.working_disks = working; | |
553 | } | |
554 | ||
555 | static int update_super1(struct supertype *st, struct mdinfo *info, | |
556 | char *update, | |
557 | char *devname, int verbose, | |
558 | int uuid_set, char *homehost) | |
559 | { | |
560 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. | |
561 | * For others, the return value is ignored. | |
562 | */ | |
563 | int rv = 0; | |
564 | struct mdp_superblock_1 *sb = st->sb; | |
565 | ||
566 | if (strcmp(update, "force-one")==0) { | |
567 | /* Not enough devices for a working array, | |
568 | * so bring this one up-to-date | |
569 | */ | |
570 | if (sb->events != __cpu_to_le64(info->events)) | |
571 | rv = 1; | |
572 | sb->events = __cpu_to_le64(info->events); | |
573 | } | |
574 | if (strcmp(update, "force-array")==0) { | |
575 | /* Degraded array and 'force' requests to | |
576 | * maybe need to mark it 'clean'. | |
577 | */ | |
578 | switch(__le32_to_cpu(sb->level)) { | |
579 | case 5: case 4: case 6: | |
580 | /* need to force clean */ | |
581 | if (sb->resync_offset != ~0ULL) | |
582 | rv = 1; | |
583 | sb->resync_offset = ~0ULL; | |
584 | } | |
585 | } | |
586 | if (strcmp(update, "assemble")==0) { | |
587 | int d = info->disk.number; | |
588 | int want; | |
589 | if (info->disk.state == 6) | |
590 | want = __cpu_to_le32(info->disk.raid_disk); | |
591 | else | |
592 | want = 0xFFFF; | |
593 | if (sb->dev_roles[d] != want) { | |
594 | sb->dev_roles[d] = want; | |
595 | rv = 1; | |
596 | } | |
597 | } | |
598 | if (strcmp(update, "linear-grow-new") == 0) { | |
599 | int i; | |
600 | int rfd, fd; | |
601 | int max = __le32_to_cpu(sb->max_dev); | |
602 | ||
603 | for (i=0 ; i < max ; i++) | |
604 | if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe) | |
605 | break; | |
606 | sb->dev_number = __cpu_to_le32(i); | |
607 | info->disk.number = i; | |
608 | if (max >= __le32_to_cpu(sb->max_dev)) | |
609 | sb->max_dev = __cpu_to_le32(max+1); | |
610 | ||
611 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
612 | read(rfd, sb->device_uuid, 16) != 16) { | |
613 | *(__u32*)(sb->device_uuid) = random(); | |
614 | *(__u32*)(sb->device_uuid+4) = random(); | |
615 | *(__u32*)(sb->device_uuid+8) = random(); | |
616 | *(__u32*)(sb->device_uuid+12) = random(); | |
617 | } | |
618 | ||
619 | sb->dev_roles[i] = | |
620 | __cpu_to_le16(info->disk.raid_disk); | |
621 | ||
622 | fd = open(devname, O_RDONLY); | |
623 | if (fd >= 0) { | |
624 | unsigned long long ds; | |
625 | get_dev_size(fd, devname, &ds); | |
626 | close(fd); | |
627 | ds >>= 9; | |
628 | if (__le64_to_cpu(sb->super_offset) < | |
629 | __le64_to_cpu(sb->data_offset)) { | |
630 | sb->data_size = __cpu_to_le64( | |
631 | ds - __le64_to_cpu(sb->data_offset)); | |
632 | } else { | |
633 | ds -= 8*2; | |
634 | ds &= ~(unsigned long long)(4*2-1); | |
635 | sb->super_offset = __cpu_to_le64(ds); | |
636 | sb->data_size = __cpu_to_le64( | |
637 | ds - __le64_to_cpu(sb->data_offset)); | |
638 | } | |
639 | } | |
640 | } | |
641 | if (strcmp(update, "linear-grow-update") == 0) { | |
642 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
643 | sb->dev_roles[info->disk.number] = | |
644 | __cpu_to_le16(info->disk.raid_disk); | |
645 | } | |
646 | if (strcmp(update, "resync") == 0) { | |
647 | /* make sure resync happens */ | |
648 | sb->resync_offset = 0ULL; | |
649 | } | |
650 | if (strcmp(update, "uuid") == 0) { | |
651 | copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid); | |
652 | ||
653 | if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
654 | struct bitmap_super_s *bm; | |
655 | bm = (struct bitmap_super_s*)(st->sb+1024); | |
656 | memcpy(bm->uuid, sb->set_uuid, 16); | |
657 | } | |
658 | } | |
659 | if (strcmp(update, "homehost") == 0 && | |
660 | homehost) { | |
661 | char *c; | |
662 | update = "name"; | |
663 | c = strchr(sb->set_name, ':'); | |
664 | if (c) | |
665 | strncpy(info->name, c+1, 31 - (c-sb->set_name)); | |
666 | else | |
667 | strncpy(info->name, sb->set_name, 32); | |
668 | info->name[32] = 0; | |
669 | } | |
670 | if (strcmp(update, "name") == 0) { | |
671 | if (info->name[0] == 0) | |
672 | sprintf(info->name, "%d", info->array.md_minor); | |
673 | memset(sb->set_name, 0, sizeof(sb->set_name)); | |
674 | if (homehost && | |
675 | strchr(info->name, ':') == NULL && | |
676 | strlen(homehost)+1+strlen(info->name) < 32) { | |
677 | strcpy(sb->set_name, homehost); | |
678 | strcat(sb->set_name, ":"); | |
679 | strcat(sb->set_name, info->name); | |
680 | } else | |
681 | strcpy(sb->set_name, info->name); | |
682 | } | |
683 | if (strcmp(update, "devicesize") == 0 && | |
684 | __le64_to_cpu(sb->super_offset) < | |
685 | __le64_to_cpu(sb->data_offset)) { | |
686 | /* set data_size to device size less data_offset */ | |
687 | struct misc_dev_info *misc = (struct misc_dev_info*) | |
688 | (st->sb + 1024 + 512); | |
689 | printf("Size was %llu\n", (unsigned long long) | |
690 | __le64_to_cpu(sb->data_size)); | |
691 | sb->data_size = __cpu_to_le64( | |
692 | misc->device_size - __le64_to_cpu(sb->data_offset)); | |
693 | printf("Size is %llu\n", (unsigned long long) | |
694 | __le64_to_cpu(sb->data_size)); | |
695 | } | |
696 | if (strcmp(update, "_reshape_progress")==0) | |
697 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
698 | ||
699 | sb->sb_csum = calc_sb_1_csum(sb); | |
700 | return rv; | |
701 | } | |
702 | ||
703 | static int init_super1(struct supertype *st, mdu_array_info_t *info, | |
704 | unsigned long long size, char *name, char *homehost, int *uuid) | |
705 | { | |
706 | struct mdp_superblock_1 *sb; | |
707 | int spares; | |
708 | int rfd; | |
709 | char defname[10]; | |
710 | ||
711 | if (posix_memalign((void**)&sb, 512, (1024 + 512 + | |
712 | sizeof(struct misc_dev_info))) != 0) { | |
713 | fprintf(stderr, Name | |
714 | ": %s could not allocate superblock\n", __func__); | |
715 | return 0; | |
716 | } | |
717 | memset(sb, 0, 1024); | |
718 | ||
719 | st->sb = sb; | |
720 | if (info == NULL) { | |
721 | /* zeroing superblock */ | |
722 | return 0; | |
723 | } | |
724 | ||
725 | spares = info->working_disks - info->active_disks; | |
726 | if (info->raid_disks + spares > 384) { | |
727 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
728 | info->raid_disks , spares, 384); | |
729 | return 0; | |
730 | } | |
731 | ||
732 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
733 | sb->major_version = __cpu_to_le32(1); | |
734 | sb->feature_map = 0; | |
735 | sb->pad0 = 0; | |
736 | ||
737 | if (uuid) | |
738 | copy_uuid(sb->set_uuid, uuid, super1.swapuuid); | |
739 | else { | |
740 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
741 | read(rfd, sb->set_uuid, 16) != 16) { | |
742 | *(__u32*)(sb->set_uuid) = random(); | |
743 | *(__u32*)(sb->set_uuid+4) = random(); | |
744 | *(__u32*)(sb->set_uuid+8) = random(); | |
745 | *(__u32*)(sb->set_uuid+12) = random(); | |
746 | } | |
747 | if (rfd >= 0) close(rfd); | |
748 | } | |
749 | ||
750 | if (name == NULL || *name == 0) { | |
751 | sprintf(defname, "%d", info->md_minor); | |
752 | name = defname; | |
753 | } | |
754 | memset(sb->set_name, 0, 32); | |
755 | if (homehost && | |
756 | strchr(name, ':')== NULL && | |
757 | strlen(homehost)+1+strlen(name) < 32) { | |
758 | strcpy(sb->set_name, homehost); | |
759 | strcat(sb->set_name, ":"); | |
760 | strcat(sb->set_name, name); | |
761 | } else | |
762 | strcpy(sb->set_name, name); | |
763 | ||
764 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
765 | sb->level = __cpu_to_le32(info->level); | |
766 | sb->layout = __cpu_to_le32(info->layout); | |
767 | sb->size = __cpu_to_le64(size*2ULL); | |
768 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
769 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
770 | ||
771 | sb->data_offset = __cpu_to_le64(0); | |
772 | sb->data_size = __cpu_to_le64(0); | |
773 | sb->super_offset = __cpu_to_le64(0); | |
774 | sb->recovery_offset = __cpu_to_le64(0); | |
775 | ||
776 | sb->utime = sb->ctime; | |
777 | sb->events = __cpu_to_le64(1); | |
778 | if (info->state & (1<<MD_SB_CLEAN)) | |
779 | sb->resync_offset = ~0ULL; | |
780 | else | |
781 | sb->resync_offset = 0; | |
782 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ | |
783 | sizeof(sb->dev_roles[0])); | |
784 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
785 | ||
786 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
787 | ||
788 | return 1; | |
789 | } | |
790 | ||
791 | struct devinfo { | |
792 | int fd; | |
793 | char *devname; | |
794 | mdu_disk_info_t disk; | |
795 | struct devinfo *next; | |
796 | }; | |
797 | #ifndef MDASSEMBLE | |
798 | /* Add a device to the superblock being created */ | |
799 | static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk, | |
800 | int fd, char *devname) | |
801 | { | |
802 | struct mdp_superblock_1 *sb = st->sb; | |
803 | __u16 *rp = sb->dev_roles + dk->number; | |
804 | struct devinfo *di, **dip; | |
805 | ||
806 | if ((dk->state & 6) == 6) /* active, sync */ | |
807 | *rp = __cpu_to_le16(dk->raid_disk); | |
808 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ | |
809 | *rp = 0xffff; | |
810 | else | |
811 | *rp = 0xfffe; | |
812 | ||
813 | sb->dev_number = __cpu_to_le32(dk->number); | |
814 | sb->sb_csum = calc_sb_1_csum(sb); | |
815 | ||
816 | dip = (struct devinfo **)&st->info; | |
817 | while (*dip) | |
818 | dip = &(*dip)->next; | |
819 | di = malloc(sizeof(struct devinfo)); | |
820 | di->fd = fd; | |
821 | di->devname = devname; | |
822 | di->disk = *dk; | |
823 | di->next = NULL; | |
824 | *dip = di; | |
825 | ||
826 | return 0; | |
827 | } | |
828 | #endif | |
829 | ||
830 | static void locate_bitmap1(struct supertype *st, int fd); | |
831 | ||
832 | static int store_super1(struct supertype *st, int fd) | |
833 | { | |
834 | struct mdp_superblock_1 *sb = st->sb; | |
835 | unsigned long long sb_offset; | |
836 | int sbsize; | |
837 | unsigned long long dsize; | |
838 | ||
839 | if (!get_dev_size(fd, NULL, &dsize)) | |
840 | return 1; | |
841 | ||
842 | dsize >>= 9; | |
843 | ||
844 | if (dsize < 24) | |
845 | return 2; | |
846 | ||
847 | /* | |
848 | * Calculate the position of the superblock. | |
849 | * It is always aligned to a 4K boundary and | |
850 | * depending on minor_version, it can be: | |
851 | * 0: At least 8K, but less than 12K, from end of device | |
852 | * 1: At start of device | |
853 | * 2: 4K from start of device. | |
854 | */ | |
855 | switch(st->minor_version) { | |
856 | case 0: | |
857 | sb_offset = dsize; | |
858 | sb_offset -= 8*2; | |
859 | sb_offset &= ~(4*2-1); | |
860 | break; | |
861 | case 1: | |
862 | sb_offset = 0; | |
863 | break; | |
864 | case 2: | |
865 | sb_offset = 4*2; | |
866 | break; | |
867 | default: | |
868 | return -EINVAL; | |
869 | } | |
870 | ||
871 | ||
872 | ||
873 | if (sb_offset != __le64_to_cpu(sb->super_offset) && | |
874 | 0 != __le64_to_cpu(sb->super_offset) | |
875 | ) { | |
876 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
877 | abort(); | |
878 | } | |
879 | ||
880 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) | |
881 | return 3; | |
882 | ||
883 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
884 | sbsize = (sbsize+511)&(~511UL); | |
885 | ||
886 | if (write(fd, sb, sbsize) != sbsize) | |
887 | return 4; | |
888 | ||
889 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
890 | struct bitmap_super_s *bm = (struct bitmap_super_s*) | |
891 | (((char*)sb)+1024); | |
892 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { | |
893 | locate_bitmap1(st, fd); | |
894 | if (write(fd, bm, ROUND_UP(sizeof(*bm),512)) != | |
895 | ROUND_UP(sizeof(*bm),512)) | |
896 | return 5; | |
897 | } | |
898 | } | |
899 | fsync(fd); | |
900 | return 0; | |
901 | } | |
902 | ||
903 | static int load_super1(struct supertype *st, int fd, char *devname); | |
904 | ||
905 | static unsigned long choose_bm_space(unsigned long devsize) | |
906 | { | |
907 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, | |
908 | * if bigger than 200Gig, save 128k | |
909 | */ | |
910 | if (devsize < 64*2) return 0; | |
911 | if (devsize - 64*2 >= 200*1024*1024*2) | |
912 | return 128*2; | |
913 | if (devsize - 4*2 > 8*1024*1024*2) | |
914 | return 64*2; | |
915 | return 4*2; | |
916 | } | |
917 | ||
918 | #ifndef MDASSEMBLE | |
919 | static int write_init_super1(struct supertype *st) | |
920 | { | |
921 | struct mdp_superblock_1 *sb = st->sb; | |
922 | struct supertype refst; | |
923 | int rfd; | |
924 | int rv = 0; | |
925 | int bm_space; | |
926 | struct devinfo *di; | |
927 | unsigned long long dsize, array_size; | |
928 | long long sb_offset; | |
929 | ||
930 | for (di = st->info; di && ! rv ; di = di->next) { | |
931 | if (di->disk.state == 1) | |
932 | continue; | |
933 | if (di->fd < 0) | |
934 | continue; | |
935 | ||
936 | Kill(di->devname, 0, 1, 1); | |
937 | Kill(di->devname, 0, 1, 1); | |
938 | ||
939 | sb->dev_number = __cpu_to_le32(di->disk.number); | |
940 | if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY)) | |
941 | sb->devflags |= __cpu_to_le32(WriteMostly1); | |
942 | ||
943 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
944 | read(rfd, sb->device_uuid, 16) != 16) { | |
945 | *(__u32*)(sb->device_uuid) = random(); | |
946 | *(__u32*)(sb->device_uuid+4) = random(); | |
947 | *(__u32*)(sb->device_uuid+8) = random(); | |
948 | *(__u32*)(sb->device_uuid+12) = random(); | |
949 | } | |
950 | if (rfd >= 0) close(rfd); | |
951 | sb->events = 0; | |
952 | ||
953 | refst =*st; | |
954 | refst.sb = NULL; | |
955 | if (load_super1(&refst, di->fd, NULL)==0) { | |
956 | struct mdp_superblock_1 *refsb = refst.sb; | |
957 | ||
958 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
959 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
960 | /* same array, so preserve events and | |
961 | * dev_number */ | |
962 | sb->events = refsb->events; | |
963 | /* bugs in 2.6.17 and earlier mean the | |
964 | * dev_number chosen in Manage must be preserved | |
965 | */ | |
966 | if (get_linux_version() >= 2006018) | |
967 | sb->dev_number = refsb->dev_number; | |
968 | } | |
969 | free(refsb); | |
970 | } | |
971 | ||
972 | if (!get_dev_size(di->fd, NULL, &dsize)) | |
973 | return 1; | |
974 | dsize >>= 9; | |
975 | ||
976 | if (dsize < 24) { | |
977 | close(di->fd); | |
978 | return 2; | |
979 | } | |
980 | ||
981 | ||
982 | /* | |
983 | * Calculate the position of the superblock. | |
984 | * It is always aligned to a 4K boundary and | |
985 | * depending on minor_version, it can be: | |
986 | * 0: At least 8K, but less than 12K, from end of device | |
987 | * 1: At start of device | |
988 | * 2: 4K from start of device. | |
989 | * Depending on the array size, we might leave extra space | |
990 | * for a bitmap. | |
991 | */ | |
992 | array_size = __le64_to_cpu(sb->size); | |
993 | /* work out how much space we left for a bitmap */ | |
994 | bm_space = choose_bm_space(array_size); | |
995 | ||
996 | switch(st->minor_version) { | |
997 | case 0: | |
998 | sb_offset = dsize; | |
999 | sb_offset -= 8*2; | |
1000 | sb_offset &= ~(4*2-1); | |
1001 | sb->super_offset = __cpu_to_le64(sb_offset); | |
1002 | sb->data_offset = __cpu_to_le64(0); | |
1003 | if (sb_offset - bm_space < array_size) | |
1004 | bm_space = sb_offset - array_size; | |
1005 | sb->data_size = __cpu_to_le64(sb_offset - bm_space); | |
1006 | break; | |
1007 | case 1: | |
1008 | sb->super_offset = __cpu_to_le64(0); | |
1009 | if (4*2 + bm_space + __le64_to_cpu(sb->size) > dsize) | |
1010 | bm_space = dsize - __le64_to_cpu(sb->size) -4*2; | |
1011 | sb->data_offset = __cpu_to_le64(bm_space + 4*2); | |
1012 | sb->data_size = __cpu_to_le64(dsize - bm_space - 4*2); | |
1013 | break; | |
1014 | case 2: | |
1015 | sb_offset = 4*2; | |
1016 | sb->super_offset = __cpu_to_le64(4*2); | |
1017 | if (4*2 + 4*2 + bm_space + __le64_to_cpu(sb->size) | |
1018 | > dsize) | |
1019 | bm_space = dsize - __le64_to_cpu(sb->size) | |
1020 | - 4*2 - 4*2; | |
1021 | sb->data_offset = __cpu_to_le64(4*2 + 4*2 + bm_space); | |
1022 | sb->data_size = __cpu_to_le64(dsize - 4*2 - 4*2 | |
1023 | - bm_space ); | |
1024 | break; | |
1025 | default: | |
1026 | return -EINVAL; | |
1027 | } | |
1028 | ||
1029 | ||
1030 | sb->sb_csum = calc_sb_1_csum(sb); | |
1031 | rv = store_super1(st, di->fd); | |
1032 | if (rv) | |
1033 | fprintf(stderr, | |
1034 | Name ": failed to write superblock to %s\n", | |
1035 | di->devname); | |
1036 | ||
1037 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) | |
1038 | rv = st->ss->write_bitmap(st, di->fd); | |
1039 | close(di->fd); | |
1040 | di->fd = -1; | |
1041 | } | |
1042 | return rv; | |
1043 | } | |
1044 | #endif | |
1045 | ||
1046 | static int compare_super1(struct supertype *st, struct supertype *tst) | |
1047 | { | |
1048 | /* | |
1049 | * return: | |
1050 | * 0 same, or first was empty, and second was copied | |
1051 | * 1 second had wrong number | |
1052 | * 2 wrong uuid | |
1053 | * 3 wrong other info | |
1054 | */ | |
1055 | struct mdp_superblock_1 *first = st->sb; | |
1056 | struct mdp_superblock_1 *second = tst->sb; | |
1057 | ||
1058 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
1059 | return 1; | |
1060 | if (second->major_version != __cpu_to_le32(1)) | |
1061 | return 1; | |
1062 | ||
1063 | if (!first) { | |
1064 | if (posix_memalign((void**)&first, 512, | |
1065 | 1024 + 512 + | |
1066 | sizeof(struct misc_dev_info)) != 0) { | |
1067 | fprintf(stderr, Name | |
1068 | ": %s could not allocate superblock\n", __func__); | |
1069 | return 1; | |
1070 | } | |
1071 | memcpy(first, second, 1024 + 512 + | |
1072 | sizeof(struct misc_dev_info)); | |
1073 | st->sb = first; | |
1074 | return 0; | |
1075 | } | |
1076 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
1077 | return 2; | |
1078 | ||
1079 | if (first->ctime != second->ctime || | |
1080 | first->level != second->level || | |
1081 | first->layout != second->layout || | |
1082 | first->size != second->size || | |
1083 | first->chunksize != second->chunksize || | |
1084 | first->raid_disks != second->raid_disks) | |
1085 | return 3; | |
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | static void free_super1(struct supertype *st); | |
1090 | ||
1091 | static int load_super1(struct supertype *st, int fd, char *devname) | |
1092 | { | |
1093 | unsigned long long dsize; | |
1094 | unsigned long long sb_offset; | |
1095 | struct mdp_superblock_1 *super; | |
1096 | int uuid[4]; | |
1097 | struct bitmap_super_s *bsb; | |
1098 | struct misc_dev_info *misc; | |
1099 | ||
1100 | free_super1(st); | |
1101 | ||
1102 | if (st->subarray[0]) | |
1103 | return 1; | |
1104 | ||
1105 | if (st->ss == NULL || st->minor_version == -1) { | |
1106 | int bestvers = -1; | |
1107 | struct supertype tst; | |
1108 | __u64 bestctime = 0; | |
1109 | /* guess... choose latest ctime */ | |
1110 | memset(&tst, 0, sizeof(tst)); | |
1111 | tst.ss = &super1; | |
1112 | for (tst.minor_version = 0; tst.minor_version <= 2 ; tst.minor_version++) { | |
1113 | switch(load_super1(&tst, fd, devname)) { | |
1114 | case 0: super = tst.sb; | |
1115 | if (bestvers == -1 || | |
1116 | bestctime < __le64_to_cpu(super->ctime)) { | |
1117 | bestvers = tst.minor_version; | |
1118 | bestctime = __le64_to_cpu(super->ctime); | |
1119 | } | |
1120 | free(super); | |
1121 | tst.sb = NULL; | |
1122 | break; | |
1123 | case 1: return 1; /*bad device */ | |
1124 | case 2: break; /* bad, try next */ | |
1125 | } | |
1126 | } | |
1127 | if (bestvers != -1) { | |
1128 | int rv; | |
1129 | tst.minor_version = bestvers; | |
1130 | tst.ss = &super1; | |
1131 | tst.max_devs = 384; | |
1132 | rv = load_super1(&tst, fd, devname); | |
1133 | if (rv == 0) | |
1134 | *st = tst; | |
1135 | return rv; | |
1136 | } | |
1137 | return 2; | |
1138 | } | |
1139 | if (!get_dev_size(fd, devname, &dsize)) | |
1140 | return 1; | |
1141 | dsize >>= 9; | |
1142 | ||
1143 | if (dsize < 24) { | |
1144 | if (devname) | |
1145 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", | |
1146 | devname, dsize); | |
1147 | return 1; | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * Calculate the position of the superblock. | |
1152 | * It is always aligned to a 4K boundary and | |
1153 | * depending on minor_version, it can be: | |
1154 | * 0: At least 8K, but less than 12K, from end of device | |
1155 | * 1: At start of device | |
1156 | * 2: 4K from start of device. | |
1157 | */ | |
1158 | switch(st->minor_version) { | |
1159 | case 0: | |
1160 | sb_offset = dsize; | |
1161 | sb_offset -= 8*2; | |
1162 | sb_offset &= ~(4*2-1); | |
1163 | break; | |
1164 | case 1: | |
1165 | sb_offset = 0; | |
1166 | break; | |
1167 | case 2: | |
1168 | sb_offset = 4*2; | |
1169 | break; | |
1170 | default: | |
1171 | return -EINVAL; | |
1172 | } | |
1173 | ||
1174 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
1175 | ||
1176 | ||
1177 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
1178 | if (devname) | |
1179 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
1180 | devname, strerror(errno)); | |
1181 | return 1; | |
1182 | } | |
1183 | ||
1184 | if (posix_memalign((void**)&super, 512, | |
1185 | 1024 + 512 + | |
1186 | sizeof(struct misc_dev_info)) != 0) { | |
1187 | fprintf(stderr, Name ": %s could not allocate superblock\n", | |
1188 | __func__); | |
1189 | return 1; | |
1190 | } | |
1191 | ||
1192 | if (read(fd, super, 1024) != 1024) { | |
1193 | if (devname) | |
1194 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
1195 | devname); | |
1196 | free(super); | |
1197 | return 1; | |
1198 | } | |
1199 | ||
1200 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
1201 | if (devname) | |
1202 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
1203 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
1204 | free(super); | |
1205 | return 2; | |
1206 | } | |
1207 | ||
1208 | if (__le32_to_cpu(super->major_version) != 1) { | |
1209 | if (devname) | |
1210 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
1211 | devname, __le32_to_cpu(super->major_version)); | |
1212 | free(super); | |
1213 | return 2; | |
1214 | } | |
1215 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
1216 | if (devname) | |
1217 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
1218 | devname); | |
1219 | free(super); | |
1220 | return 2; | |
1221 | } | |
1222 | st->sb = super; | |
1223 | ||
1224 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1225 | ||
1226 | misc = (struct misc_dev_info*) (((char*)super)+1024+512); | |
1227 | misc->device_size = dsize; | |
1228 | ||
1229 | /* Now check on the bitmap superblock */ | |
1230 | if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0) | |
1231 | return 0; | |
1232 | /* Read the bitmap superblock and make sure it looks | |
1233 | * valid. If it doesn't clear the bit. An --assemble --force | |
1234 | * should get that written out. | |
1235 | */ | |
1236 | locate_bitmap1(st, fd); | |
1237 | if (read(fd, ((char*)super)+1024, 512) | |
1238 | != 512) | |
1239 | goto no_bitmap; | |
1240 | ||
1241 | uuid_from_super1(st, uuid); | |
1242 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
1243 | memcmp(bsb->uuid, uuid, 16) != 0) | |
1244 | goto no_bitmap; | |
1245 | return 0; | |
1246 | ||
1247 | no_bitmap: | |
1248 | super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1); | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | ||
1253 | static struct supertype *match_metadata_desc1(char *arg) | |
1254 | { | |
1255 | struct supertype *st = malloc(sizeof(*st)); | |
1256 | if (!st) return st; | |
1257 | ||
1258 | memset(st, 0, sizeof(*st)); | |
1259 | st->ss = &super1; | |
1260 | st->max_devs = 384; | |
1261 | st->sb = NULL; | |
1262 | /* leading zeros can be safely ignored. --detail generates them. */ | |
1263 | while (*arg == '0') | |
1264 | arg++; | |
1265 | if (strcmp(arg, "1.0") == 0 || | |
1266 | strcmp(arg, "1.00") == 0) { | |
1267 | st->minor_version = 0; | |
1268 | return st; | |
1269 | } | |
1270 | if (strcmp(arg, "1.1") == 0 || | |
1271 | strcmp(arg, "1.01") == 0) { | |
1272 | st->minor_version = 1; | |
1273 | return st; | |
1274 | } | |
1275 | if (strcmp(arg, "1.2") == 0 || | |
1276 | strcmp(arg, "1.02") == 0) { | |
1277 | st->minor_version = 2; | |
1278 | return st; | |
1279 | } | |
1280 | if (strcmp(arg, "1") == 0 || | |
1281 | strcmp(arg, "default") == 0) { | |
1282 | st->minor_version = -1; | |
1283 | return st; | |
1284 | } | |
1285 | ||
1286 | free(st); | |
1287 | return NULL; | |
1288 | } | |
1289 | ||
1290 | /* find available size on device with this devsize, using | |
1291 | * superblock type st, and reserving 'reserve' sectors for | |
1292 | * a possible bitmap | |
1293 | */ | |
1294 | static __u64 avail_size1(struct supertype *st, __u64 devsize) | |
1295 | { | |
1296 | struct mdp_superblock_1 *super = st->sb; | |
1297 | if (devsize < 24) | |
1298 | return 0; | |
1299 | ||
1300 | if (super == NULL) | |
1301 | /* creating: allow suitable space for bitmap */ | |
1302 | devsize -= choose_bm_space(devsize); | |
1303 | #ifndef MDASSEMBLE | |
1304 | else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
1305 | /* hot-add. allow for actual size of bitmap */ | |
1306 | struct bitmap_super_s *bsb; | |
1307 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1308 | devsize -= bitmap_sectors(bsb); | |
1309 | } | |
1310 | #endif | |
1311 | ||
1312 | switch(st->minor_version) { | |
1313 | case -1: /* no specified. Now time to set default */ | |
1314 | st->minor_version = 0; | |
1315 | /* FALL THROUGH */ | |
1316 | case 0: | |
1317 | /* at end */ | |
1318 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
1319 | case 1: | |
1320 | /* at start, 4K for superblock and possible bitmap */ | |
1321 | return devsize - 4*2; | |
1322 | case 2: | |
1323 | /* 4k from start, 4K for superblock and possible bitmap */ | |
1324 | return devsize - (4+4)*2; | |
1325 | } | |
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | static int | |
1330 | add_internal_bitmap1(struct supertype *st, | |
1331 | int *chunkp, int delay, int write_behind, | |
1332 | unsigned long long size, | |
1333 | int may_change, int major) | |
1334 | { | |
1335 | /* | |
1336 | * If not may_change, then this is a 'Grow', and the bitmap | |
1337 | * must fit after the superblock. | |
1338 | * If may_change, then this is create, and we can put the bitmap | |
1339 | * before the superblock if we like, or may move the start. | |
1340 | * If !may_change, the bitmap MUST live at offset of 1K, until | |
1341 | * we get a sysfs interface. | |
1342 | * | |
1343 | * size is in sectors, chunk is in bytes !!! | |
1344 | */ | |
1345 | ||
1346 | unsigned long long bits; | |
1347 | unsigned long long max_bits; | |
1348 | unsigned long long min_chunk; | |
1349 | long offset; | |
1350 | int chunk = *chunkp; | |
1351 | int room = 0; | |
1352 | struct mdp_superblock_1 *sb = st->sb; | |
1353 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
1354 | ||
1355 | switch(st->minor_version) { | |
1356 | case 0: | |
1357 | /* either 3K after the superblock, or some amount of space | |
1358 | * before. | |
1359 | */ | |
1360 | if (may_change) { | |
1361 | /* We are creating array, so we *know* how much room has | |
1362 | * been left. | |
1363 | */ | |
1364 | offset = 0; | |
1365 | room = choose_bm_space(__le64_to_cpu(sb->size)); | |
1366 | if (room == 4*2) { | |
1367 | /* make it 3K after the superblock */ | |
1368 | room = 3*2; | |
1369 | offset = 2; | |
1370 | } | |
1371 | } else { | |
1372 | room = __le64_to_cpu(sb->super_offset) | |
1373 | - __le64_to_cpu(sb->data_offset) | |
1374 | - __le64_to_cpu(sb->data_size); | |
1375 | /* remove '1 ||' when we can set offset via sysfs */ | |
1376 | if (1 || (room < 3*2 && | |
1377 | __le32_to_cpu(sb->max_dev) <= 384)) { | |
1378 | room = 3*2; | |
1379 | offset = 1*2; | |
1380 | } else { | |
1381 | offset = 0; /* means movable offset */ | |
1382 | } | |
1383 | } | |
1384 | break; | |
1385 | case 1: | |
1386 | case 2: /* between superblock and data */ | |
1387 | if (may_change) { | |
1388 | offset = 4*2; | |
1389 | room = choose_bm_space(__le64_to_cpu(sb->size)); | |
1390 | } else { | |
1391 | room = __le64_to_cpu(sb->data_offset) | |
1392 | - __le64_to_cpu(sb->super_offset); | |
1393 | if (1 || __le32_to_cpu(sb->max_dev) <= 384) { | |
1394 | room -= 2; | |
1395 | offset = 2; | |
1396 | } else { | |
1397 | room -= 4*2; | |
1398 | offset = 4*2; | |
1399 | } | |
1400 | } | |
1401 | break; | |
1402 | default: | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | if (chunk == UnSet && room > 128*2) | |
1407 | /* Limit to 128K of bitmap when chunk size not requested */ | |
1408 | room = 128*2; | |
1409 | ||
1410 | max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8; | |
1411 | ||
1412 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
1413 | bits = (size*512)/min_chunk +1; | |
1414 | while (bits > max_bits) { | |
1415 | min_chunk *= 2; | |
1416 | bits = (bits+1)/2; | |
1417 | } | |
1418 | if (chunk == UnSet) | |
1419 | chunk = min_chunk; | |
1420 | else if (chunk < min_chunk) | |
1421 | return 0; /* chunk size too small */ | |
1422 | if (chunk == 0) /* rounding problem */ | |
1423 | return 0; | |
1424 | ||
1425 | if (offset == 0) { | |
1426 | bits = (size*512) / chunk + 1; | |
1427 | room = ((bits+7)/8 + sizeof(bitmap_super_t) +511)/512; | |
1428 | offset = -room; | |
1429 | } | |
1430 | ||
1431 | sb->bitmap_offset = __cpu_to_le32(offset); | |
1432 | ||
1433 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
1434 | memset(bms, 0, sizeof(*bms)); | |
1435 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); | |
1436 | bms->version = __cpu_to_le32(major); | |
1437 | uuid_from_super1(st, (int*)bms->uuid); | |
1438 | bms->chunksize = __cpu_to_le32(chunk); | |
1439 | bms->daemon_sleep = __cpu_to_le32(delay); | |
1440 | bms->sync_size = __cpu_to_le64(size); | |
1441 | bms->write_behind = __cpu_to_le32(write_behind); | |
1442 | ||
1443 | *chunkp = chunk; | |
1444 | return 1; | |
1445 | } | |
1446 | ||
1447 | ||
1448 | static void locate_bitmap1(struct supertype *st, int fd) | |
1449 | { | |
1450 | unsigned long long offset; | |
1451 | struct mdp_superblock_1 *sb; | |
1452 | int mustfree = 0; | |
1453 | ||
1454 | if (!st->sb) { | |
1455 | if (st->ss->load_super(st, fd, NULL)) | |
1456 | return; /* no error I hope... */ | |
1457 | mustfree = 1; | |
1458 | } | |
1459 | sb = st->sb; | |
1460 | ||
1461 | offset = __le64_to_cpu(sb->super_offset); | |
1462 | offset += (int32_t) __le32_to_cpu(sb->bitmap_offset); | |
1463 | if (mustfree) | |
1464 | free(sb); | |
1465 | lseek64(fd, offset<<9, 0); | |
1466 | } | |
1467 | ||
1468 | static int write_bitmap1(struct supertype *st, int fd) | |
1469 | { | |
1470 | struct mdp_superblock_1 *sb = st->sb; | |
1471 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); | |
1472 | int rv = 0; | |
1473 | ||
1474 | int towrite, n; | |
1475 | char abuf[4096+512]; | |
1476 | char *buf = (char*)(((long)(abuf+512))&~511UL); | |
1477 | ||
1478 | locate_bitmap1(st, fd); | |
1479 | ||
1480 | memset(buf, 0xff, 4096); | |
1481 | memcpy(buf, ((char*)sb)+1024, sizeof(bitmap_super_t)); | |
1482 | ||
1483 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); | |
1484 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
1485 | towrite += sizeof(bitmap_super_t); | |
1486 | towrite = ROUND_UP(towrite, 512); | |
1487 | while (towrite > 0) { | |
1488 | n = towrite; | |
1489 | if (n > 4096) | |
1490 | n = 4096; | |
1491 | n = write(fd, buf, n); | |
1492 | if (n > 0) | |
1493 | towrite -= n; | |
1494 | else | |
1495 | break; | |
1496 | memset(buf, 0xff, 4096); | |
1497 | } | |
1498 | fsync(fd); | |
1499 | if (towrite) | |
1500 | rv = -2; | |
1501 | ||
1502 | return rv; | |
1503 | } | |
1504 | ||
1505 | static void free_super1(struct supertype *st) | |
1506 | { | |
1507 | if (st->sb) | |
1508 | free(st->sb); | |
1509 | st->sb = NULL; | |
1510 | } | |
1511 | ||
1512 | #ifndef MDASSEMBLE | |
1513 | static int validate_geometry1(struct supertype *st, int level, | |
1514 | int layout, int raiddisks, | |
1515 | int chunk, unsigned long long size, | |
1516 | char *subdev, unsigned long long *freesize, | |
1517 | int verbose) | |
1518 | { | |
1519 | unsigned long long ldsize; | |
1520 | int fd; | |
1521 | ||
1522 | if (level == LEVEL_CONTAINER) | |
1523 | return 0; | |
1524 | if (!subdev) | |
1525 | return 1; | |
1526 | ||
1527 | fd = open(subdev, O_RDONLY|O_EXCL, 0); | |
1528 | if (fd < 0) { | |
1529 | if (verbose) | |
1530 | fprintf(stderr, Name ": super1.x cannot open %s: %s\n", | |
1531 | subdev, strerror(errno)); | |
1532 | return 0; | |
1533 | } | |
1534 | ||
1535 | if (!get_dev_size(fd, subdev, &ldsize)) { | |
1536 | close(fd); | |
1537 | return 0; | |
1538 | } | |
1539 | close(fd); | |
1540 | ||
1541 | *freesize = avail_size1(st, ldsize >> 9); | |
1542 | return 1; | |
1543 | } | |
1544 | #endif /* MDASSEMBLE */ | |
1545 | ||
1546 | struct superswitch super1 = { | |
1547 | #ifndef MDASSEMBLE | |
1548 | .examine_super = examine_super1, | |
1549 | .brief_examine_super = brief_examine_super1, | |
1550 | .export_examine_super = export_examine_super1, | |
1551 | .detail_super = detail_super1, | |
1552 | .brief_detail_super = brief_detail_super1, | |
1553 | .export_detail_super = export_detail_super1, | |
1554 | .write_init_super = write_init_super1, | |
1555 | .validate_geometry = validate_geometry1, | |
1556 | .add_to_super = add_to_super1, | |
1557 | #endif | |
1558 | .match_home = match_home1, | |
1559 | .uuid_from_super = uuid_from_super1, | |
1560 | .getinfo_super = getinfo_super1, | |
1561 | .update_super = update_super1, | |
1562 | .init_super = init_super1, | |
1563 | .store_super = store_super1, | |
1564 | .compare_super = compare_super1, | |
1565 | .load_super = load_super1, | |
1566 | .match_metadata_desc = match_metadata_desc1, | |
1567 | .avail_size = avail_size1, | |
1568 | .add_internal_bitmap = add_internal_bitmap1, | |
1569 | .locate_bitmap = locate_bitmap1, | |
1570 | .write_bitmap = write_bitmap1, | |
1571 | .free_super = free_super1, | |
1572 | #if __BYTE_ORDER == BIG_ENDIAN | |
1573 | .swapuuid = 0, | |
1574 | #else | |
1575 | .swapuuid = 1, | |
1576 | #endif | |
1577 | }; |