]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> | |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
30 | #include "mdadm.h" | |
31 | /* | |
32 | * The version-1 superblock : | |
33 | * All numeric fields are little-endian. | |
34 | * | |
35 | * total size: 256 bytes plus 2 per device. | |
36 | * 1K allows 384 devices. | |
37 | */ | |
38 | struct mdp_superblock_1 { | |
39 | /* constant array information - 128 bytes */ | |
40 | __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */ | |
41 | __u32 major_version; /* 1 */ | |
42 | __u32 feature_map; /* 0 for now */ | |
43 | __u32 pad0; /* always set to 0 when writing */ | |
44 | ||
45 | __u8 set_uuid[16]; /* user-space generated. */ | |
46 | char set_name[32]; /* set and interpreted by user-space */ | |
47 | ||
48 | __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/ | |
49 | __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */ | |
50 | __u32 layout; /* only for raid5 currently */ | |
51 | __u64 size; /* used size of component devices, in 512byte sectors */ | |
52 | ||
53 | __u32 chunksize; /* in 512byte sectors */ | |
54 | __u32 raid_disks; | |
55 | __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts | |
56 | * NOTE: signed, so bitmap can be before superblock | |
57 | * only meaningful of feature_map[0] is set. | |
58 | */ | |
59 | ||
60 | /* These are only valid with feature bit '4' */ | |
61 | __u32 new_level; /* new level we are reshaping to */ | |
62 | __u64 reshape_position; /* next address in array-space for reshape */ | |
63 | __u32 delta_disks; /* change in number of raid_disks */ | |
64 | __u32 new_layout; /* new layout */ | |
65 | __u32 new_chunk; /* new chunk size (bytes) */ | |
66 | __u8 pad1[128-124]; /* set to 0 when written */ | |
67 | ||
68 | /* constant this-device information - 64 bytes */ | |
69 | __u64 data_offset; /* sector start of data, often 0 */ | |
70 | __u64 data_size; /* sectors in this device that can be used for data */ | |
71 | __u64 super_offset; /* sector start of this superblock */ | |
72 | __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */ | |
73 | __u32 dev_number; /* permanent identifier of this device - not role in raid */ | |
74 | __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */ | |
75 | __u8 device_uuid[16]; /* user-space setable, ignored by kernel */ | |
76 | __u8 devflags; /* per-device flags. Only one defined...*/ | |
77 | #define WriteMostly1 1 /* mask for writemostly flag in above */ | |
78 | __u8 pad2[64-57]; /* set to 0 when writing */ | |
79 | ||
80 | /* array state information - 64 bytes */ | |
81 | __u64 utime; /* 40 bits second, 24 btes microseconds */ | |
82 | __u64 events; /* incremented when superblock updated */ | |
83 | __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */ | |
84 | __u32 sb_csum; /* checksum upto devs[max_dev] */ | |
85 | __u32 max_dev; /* size of devs[] array to consider */ | |
86 | __u8 pad3[64-32]; /* set to 0 when writing */ | |
87 | ||
88 | /* device state information. Indexed by dev_number. | |
89 | * 2 bytes per device | |
90 | * Note there are no per-device state flags. State information is rolled | |
91 | * into the 'roles' value. If a device is spare or faulty, then it doesn't | |
92 | * have a meaningful role. | |
93 | */ | |
94 | __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ | |
95 | }; | |
96 | ||
97 | /* feature_map bits */ | |
98 | #define MD_FEATURE_BITMAP_OFFSET 1 | |
99 | #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and | |
100 | * must be honoured | |
101 | */ | |
102 | #define MD_FEATURE_RESHAPE_ACTIVE 4 | |
103 | ||
104 | #define MD_FEATURE_ALL (1|2|4) | |
105 | ||
106 | #ifndef offsetof | |
107 | #define offsetof(t,f) ((size_t)&(((t*)0)->f)) | |
108 | #endif | |
109 | static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb) | |
110 | { | |
111 | unsigned int disk_csum, csum; | |
112 | unsigned long long newcsum; | |
113 | int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2; | |
114 | unsigned int *isuper = (unsigned int*)sb; | |
115 | int i; | |
116 | ||
117 | /* make sure I can count... */ | |
118 | if (offsetof(struct mdp_superblock_1,data_offset) != 128 || | |
119 | offsetof(struct mdp_superblock_1, utime) != 192 || | |
120 | sizeof(struct mdp_superblock_1) != 256) { | |
121 | fprintf(stderr, "WARNING - superblock isn't sized correctly\n"); | |
122 | } | |
123 | ||
124 | disk_csum = sb->sb_csum; | |
125 | sb->sb_csum = 0; | |
126 | newcsum = 0; | |
127 | for (i=0; size>=4; size -= 4 ) { | |
128 | newcsum += __le32_to_cpu(*isuper); | |
129 | isuper++; | |
130 | } | |
131 | ||
132 | if (size == 2) | |
133 | newcsum += __le16_to_cpu(*(unsigned short*) isuper); | |
134 | ||
135 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
136 | sb->sb_csum = disk_csum; | |
137 | return csum; | |
138 | } | |
139 | ||
140 | #ifndef MDASSEMBLE | |
141 | static void examine_super1(void *sbv, char *homehost) | |
142 | { | |
143 | struct mdp_superblock_1 *sb = sbv; | |
144 | time_t atime; | |
145 | int d; | |
146 | int faulty; | |
147 | int i; | |
148 | char *c; | |
149 | int l = homehost ? strlen(homehost) : 0; | |
150 | ||
151 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
152 | printf(" Version : %02d\n", 1); | |
153 | printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); | |
154 | printf(" Array UUID : "); | |
155 | for (i=0; i<16; i++) { | |
156 | if ((i&3)==0 && i != 0) printf(":"); | |
157 | printf("%02x", sb->set_uuid[i]); | |
158 | } | |
159 | printf("\n"); | |
160 | printf(" Name : %.32s", sb->set_name); | |
161 | if (l > 0 && l < 32 && | |
162 | sb->set_name[l] == ':' && | |
163 | strncmp(sb->set_name, homehost, l) == 0) | |
164 | printf(" (local to host %s)", homehost); | |
165 | printf("\n"); | |
166 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
167 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
168 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
169 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
170 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
171 | printf("\n"); | |
172 | printf(" Device Size : %llu%s\n", (unsigned long long)sb->data_size, human_size(sb->data_size<<9)); | |
173 | if (__le32_to_cpu(sb->level) >= 0) { | |
174 | int ddsks=0; | |
175 | switch(__le32_to_cpu(sb->level)) { | |
176 | case 1: ddsks=1;break; | |
177 | case 4: | |
178 | case 5: ddsks = sb->raid_disks-1; break; | |
179 | case 6: ddsks = sb->raid_disks-2; break; | |
180 | case 10: ddsks = sb->raid_disks / (sb->layout&255) / ((sb->layout>>8)&255); | |
181 | } | |
182 | if (ddsks) | |
183 | printf(" Array Size : %llu%s\n", ddsks*(unsigned long long)sb->size, human_size(ddsks*sb->size<<9)); | |
184 | if (sb->size != sb->data_size) | |
185 | printf(" Used Size : %llu%s\n", (unsigned long long)sb->size, human_size(sb->size<<9)); | |
186 | } | |
187 | if (sb->data_offset) | |
188 | printf(" Data Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->data_offset)); | |
189 | if (sb->super_offset) | |
190 | printf(" Super Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->super_offset)); | |
191 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) | |
192 | printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset)); | |
193 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); | |
194 | printf(" Device UUID : "); | |
195 | for (i=0; i<16; i++) { | |
196 | if ((i&3)==0 && i != 0) printf(":"); | |
197 | printf("%02x", sb->device_uuid[i]); | |
198 | } | |
199 | printf("\n"); | |
200 | printf("\n"); | |
201 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
202 | printf("Internal Bitmap : %ld sectors from superblock\n", | |
203 | (long)__le32_to_cpu(sb->bitmap_offset)); | |
204 | } | |
205 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
206 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2, | |
207 | human_size(__le64_to_cpu(sb->reshape_position)<<9)); | |
208 | if (__le32_to_cpu(sb->delta_disks)) { | |
209 | printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks)); | |
210 | if (__le32_to_cpu(sb->delta_disks)) | |
211 | printf(" (%d->%d)\n", | |
212 | __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks), | |
213 | __le32_to_cpu(sb->raid_disks)); | |
214 | else | |
215 | printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks), | |
216 | __le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks)); | |
217 | } | |
218 | if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { | |
219 | c = map_num(pers, __le32_to_cpu(sb->new_level)); | |
220 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
221 | } | |
222 | if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) { | |
223 | if (__le32_to_cpu(sb->level) == 5) { | |
224 | c = map_num(r5layout, __le32_to_cpu(sb->new_layout)); | |
225 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
226 | } | |
227 | if (__le32_to_cpu(sb->level) == 10) { | |
228 | printf(" New Layout : near=%d, %s=%d\n", | |
229 | __le32_to_cpu(sb->new_layout)&255, | |
230 | (__le32_to_cpu(sb->new_layout)&0x10000)?"offset":"far", | |
231 | (__le32_to_cpu(sb->new_layout)>>8)&255); | |
232 | } | |
233 | } | |
234 | if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) | |
235 | printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); | |
236 | printf("\n"); | |
237 | } | |
238 | if (sb->devflags) { | |
239 | printf(" Flags :"); | |
240 | if (sb->devflags & WriteMostly1) | |
241 | printf(" write-mostly"); | |
242 | printf("\n"); | |
243 | } | |
244 | ||
245 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
246 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
247 | ||
248 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
249 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
250 | else | |
251 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
252 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
253 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
254 | printf("\n"); | |
255 | if (__le32_to_cpu(sb->level) == 5) { | |
256 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
257 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
258 | } | |
259 | if (__le32_to_cpu(sb->level) == 10) { | |
260 | int lo = __le32_to_cpu(sb->layout); | |
261 | printf(" Layout : near=%d, %s=%d\n", | |
262 | lo&255, | |
263 | (lo&0x10000)?"offset":"far", | |
264 | (lo>>8)&255); | |
265 | } | |
266 | switch(__le32_to_cpu(sb->level)) { | |
267 | case 0: | |
268 | case 4: | |
269 | case 5: | |
270 | case 6: | |
271 | case 10: | |
272 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
273 | break; | |
274 | case -1: | |
275 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
276 | break; | |
277 | default: break; | |
278 | } | |
279 | printf("\n"); | |
280 | printf(" Array State : "); | |
281 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
282 | int cnt = 0; | |
283 | int me = 0; | |
284 | int i; | |
285 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
286 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
287 | if (role == d) { | |
288 | if (i == __le32_to_cpu(sb->dev_number)) | |
289 | me = 1; | |
290 | cnt++; | |
291 | } | |
292 | } | |
293 | if (cnt > 1) printf("?"); | |
294 | else if (cnt == 1 && me) printf("U"); | |
295 | else if (cnt == 1) printf("u"); | |
296 | else printf ("_"); | |
297 | } | |
298 | faulty = 0; | |
299 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
300 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
301 | if (role == 0xFFFE) | |
302 | faulty++; | |
303 | } | |
304 | if (faulty) printf(" %d failed", faulty); | |
305 | printf("\n"); | |
306 | } | |
307 | ||
308 | ||
309 | static void brief_examine_super1(void *sbv) | |
310 | { | |
311 | struct mdp_superblock_1 *sb = sbv; | |
312 | int i; | |
313 | char *nm; | |
314 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
315 | ||
316 | nm = strchr(sb->set_name, ':'); | |
317 | if (nm) | |
318 | nm++; | |
319 | else if (sb->set_name[0]) | |
320 | nm = sb->set_name; | |
321 | else | |
322 | nm = "??"; | |
323 | ||
324 | printf("ARRAY /dev/md/%s level=%s metadata=1 num-devices=%d UUID=", | |
325 | nm, | |
326 | c?c:"-unknown-", sb->raid_disks); | |
327 | for (i=0; i<16; i++) { | |
328 | printf("%02x", sb->set_uuid[i]); | |
329 | if ((i&3)==0 && i != 0) printf(":"); | |
330 | } | |
331 | if (sb->set_name[0]) | |
332 | printf(" name=%.32s", sb->set_name); | |
333 | printf("\n"); | |
334 | } | |
335 | ||
336 | static void detail_super1(void *sbv, char *homehost) | |
337 | { | |
338 | struct mdp_superblock_1 *sb = sbv; | |
339 | int i; | |
340 | int l = homehost ? strlen(homehost) : 0; | |
341 | ||
342 | printf(" Name : %.32s", sb->set_name); | |
343 | if (l > 0 && l < 32 && | |
344 | sb->set_name[l] == ':' && | |
345 | strncmp(sb->set_name, homehost, l) == 0) | |
346 | printf(" (local to host %s)", homehost); | |
347 | printf("\n UUID : "); | |
348 | for (i=0; i<16; i++) { | |
349 | if ((i&3)==0 && i != 0) printf(":"); | |
350 | printf("%02x", sb->set_uuid[i]); | |
351 | } | |
352 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
353 | } | |
354 | ||
355 | static void brief_detail_super1(void *sbv) | |
356 | { | |
357 | struct mdp_superblock_1 *sb = sbv; | |
358 | int i; | |
359 | ||
360 | if (sb->set_name[0]) | |
361 | printf(" name=%.32s", sb->set_name); | |
362 | printf(" UUID="); | |
363 | for (i=0; i<16; i++) { | |
364 | if ((i&3)==0 && i != 0) printf(":"); | |
365 | printf("%02x", sb->set_uuid[i]); | |
366 | } | |
367 | } | |
368 | ||
369 | #endif | |
370 | ||
371 | static int match_home1(void *sbv, char *homehost) | |
372 | { | |
373 | struct mdp_superblock_1 *sb = sbv; | |
374 | int l = homehost ? strlen(homehost) : 0; | |
375 | ||
376 | return (l > 0 && l < 32 && | |
377 | sb->set_name[l] == ':' && | |
378 | strncmp(sb->set_name, homehost, l) == 0); | |
379 | } | |
380 | ||
381 | static void uuid_from_super1(int uuid[4], void * sbv) | |
382 | { | |
383 | struct mdp_superblock_1 *super = sbv; | |
384 | char *cuuid = (char*)uuid; | |
385 | int i; | |
386 | for (i=0; i<16; i++) | |
387 | cuuid[i] = super->set_uuid[i]; | |
388 | } | |
389 | ||
390 | static void getinfo_super1(struct mdinfo *info, void *sbv) | |
391 | { | |
392 | struct mdp_superblock_1 *sb = sbv; | |
393 | int working = 0; | |
394 | int i; | |
395 | int role; | |
396 | ||
397 | info->array.major_version = 1; | |
398 | info->array.minor_version = __le32_to_cpu(sb->feature_map); | |
399 | info->array.patch_version = 0; | |
400 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
401 | info->array.level = __le32_to_cpu(sb->level); | |
402 | info->array.layout = __le32_to_cpu(sb->layout); | |
403 | info->array.md_minor = -1; | |
404 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
405 | info->array.utime = __le64_to_cpu(sb->utime); | |
406 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; | |
407 | ||
408 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
409 | info->component_size = __le64_to_cpu(sb->size); | |
410 | ||
411 | info->disk.major = 0; | |
412 | info->disk.minor = 0; | |
413 | info->disk.number = __le32_to_cpu(sb->dev_number); | |
414 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || | |
415 | __le32_to_cpu(sb->max_dev) > 512) | |
416 | role = 0xfffe; | |
417 | else | |
418 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
419 | ||
420 | info->disk.raid_disk = -1; | |
421 | switch(role) { | |
422 | case 0xFFFF: | |
423 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
424 | break; | |
425 | case 0xFFFE: | |
426 | info->disk.state = 1; /* faulty */ | |
427 | break; | |
428 | default: | |
429 | info->disk.state = 6; /* active and in sync */ | |
430 | info->disk.raid_disk = role; | |
431 | } | |
432 | info->events = __le64_to_cpu(sb->events); | |
433 | ||
434 | memcpy(info->uuid, sb->set_uuid, 16); | |
435 | ||
436 | strncpy(info->name, sb->set_name, 32); | |
437 | info->name[32] = 0; | |
438 | ||
439 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
440 | info->reshape_active = 1; | |
441 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
442 | info->new_level = __le32_to_cpu(sb->new_level); | |
443 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
444 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
445 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; | |
446 | } else | |
447 | info->reshape_active = 0; | |
448 | ||
449 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
450 | role = __le16_to_cpu(sb->dev_roles[i]); | |
451 | if (/*role == 0xFFFF || */role < info->array.raid_disks) | |
452 | working++; | |
453 | } | |
454 | ||
455 | info->array.working_disks = working; | |
456 | } | |
457 | ||
458 | static int update_super1(struct mdinfo *info, void *sbv, char *update, | |
459 | char *devname, int verbose, | |
460 | int uuid_set, char *homehost) | |
461 | { | |
462 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. | |
463 | * For others, the return value is ignored. | |
464 | */ | |
465 | int rv = 0; | |
466 | struct mdp_superblock_1 *sb = sbv; | |
467 | ||
468 | if (strcmp(update, "force")==0) { | |
469 | if (sb->events != __cpu_to_le64(info->events)) | |
470 | rv = 1; | |
471 | sb->events = __cpu_to_le64(info->events); | |
472 | switch(__le32_to_cpu(sb->level)) { | |
473 | case 5: case 4: case 6: | |
474 | /* need to force clean */ | |
475 | if (sb->resync_offset != ~0ULL) | |
476 | rv = 1; | |
477 | sb->resync_offset = ~0ULL; | |
478 | } | |
479 | } | |
480 | if (strcmp(update, "assemble")==0) { | |
481 | int d = info->disk.number; | |
482 | int want; | |
483 | if (info->disk.state == 6) | |
484 | want = __cpu_to_le32(info->disk.raid_disk); | |
485 | else | |
486 | want = 0xFFFF; | |
487 | if (sb->dev_roles[d] != want) { | |
488 | sb->dev_roles[d] = want; | |
489 | rv = 1; | |
490 | } | |
491 | } | |
492 | #if 0 | |
493 | if (strcmp(update, "newdev") == 0) { | |
494 | int d = info->disk.number; | |
495 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
496 | sb->disks[d].number = d; | |
497 | sb->disks[d].major = info->disk.major; | |
498 | sb->disks[d].minor = info->disk.minor; | |
499 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
500 | sb->disks[d].state = info->disk.state; | |
501 | sb->this_disk = sb->disks[d]; | |
502 | } | |
503 | #endif | |
504 | if (strcmp(update, "grow") == 0) { | |
505 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
506 | /* FIXME */ | |
507 | } | |
508 | if (strcmp(update, "resync") == 0) { | |
509 | /* make sure resync happens */ | |
510 | sb->resync_offset = ~0ULL; | |
511 | } | |
512 | if (strcmp(update, "uuid") == 0) { | |
513 | memcpy(sb->set_uuid, info->uuid, 16); | |
514 | if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
515 | struct bitmap_super_s *bm; | |
516 | bm = (struct bitmap_super_s*)(sbv+1024); | |
517 | memcpy(bm->uuid, info->uuid, 16); | |
518 | } | |
519 | } | |
520 | if (strcmp(update, "homehost") == 0 && | |
521 | homehost) { | |
522 | char *c; | |
523 | update = "name"; | |
524 | c = strchr(sb->set_name, ':'); | |
525 | if (c) | |
526 | strncpy(info->name, c+1, 31 - (c-sb->set_name)); | |
527 | else | |
528 | strncpy(info->name, sb->set_name, 32); | |
529 | info->name[33] = 0; | |
530 | } | |
531 | if (strcmp(update, "name") == 0) { | |
532 | if (info->name[0] == 0) | |
533 | sprintf(info->name, "%d", info->array.md_minor); | |
534 | memset(sb->set_name, 0, sizeof(sb->set_name)); | |
535 | if (homehost && | |
536 | strchr(info->name, ':') == NULL && | |
537 | strlen(homehost)+1+strlen(info->name) < 32) { | |
538 | strcpy(sb->set_name, homehost); | |
539 | strcat(sb->set_name, ":"); | |
540 | strcat(sb->set_name, info->name); | |
541 | } else | |
542 | strcpy(sb->set_name, info->name); | |
543 | } | |
544 | if (strcmp(update, "_reshape_progress")==0) | |
545 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
546 | ||
547 | sb->sb_csum = calc_sb_1_csum(sb); | |
548 | return rv; | |
549 | } | |
550 | ||
551 | ||
552 | static __u64 event_super1(void *sbv) | |
553 | { | |
554 | struct mdp_superblock_1 *sb = sbv; | |
555 | return __le64_to_cpu(sb->events); | |
556 | } | |
557 | ||
558 | static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info, | |
559 | unsigned long long size, char *name, char *homehost) | |
560 | { | |
561 | struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t)); | |
562 | int spares; | |
563 | int rfd; | |
564 | char defname[10]; | |
565 | memset(sb, 0, 1024); | |
566 | ||
567 | if (info->major_version == -1) { | |
568 | /* zeroing superblock */ | |
569 | *sbp = sb; | |
570 | return 0; | |
571 | } | |
572 | ||
573 | spares = info->working_disks - info->active_disks; | |
574 | if (info->raid_disks + spares > 384) { | |
575 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
576 | info->raid_disks , spares, 384); | |
577 | return 0; | |
578 | } | |
579 | ||
580 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
581 | sb->major_version = __cpu_to_le32(1); | |
582 | sb->feature_map = 0; | |
583 | sb->pad0 = 0; | |
584 | ||
585 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
586 | read(rfd, sb->set_uuid, 16) != 16) { | |
587 | *(__u32*)(sb->set_uuid) = random(); | |
588 | *(__u32*)(sb->set_uuid+4) = random(); | |
589 | *(__u32*)(sb->set_uuid+8) = random(); | |
590 | *(__u32*)(sb->set_uuid+12) = random(); | |
591 | } | |
592 | if (rfd >= 0) close(rfd); | |
593 | ||
594 | if (name == NULL || *name == 0) { | |
595 | sprintf(defname, "%d", info->md_minor); | |
596 | name = defname; | |
597 | } | |
598 | memset(sb->set_name, 0, 32); | |
599 | if (homehost && | |
600 | strchr(name, ':')== NULL && | |
601 | strlen(homehost)+1+strlen(name) < 32) { | |
602 | strcpy(sb->set_name, homehost); | |
603 | strcat(sb->set_name, ":"); | |
604 | strcat(sb->set_name, name); | |
605 | } else | |
606 | strcpy(sb->set_name, name); | |
607 | ||
608 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
609 | sb->level = __cpu_to_le32(info->level); | |
610 | sb->layout = __cpu_to_le32(info->layout); | |
611 | sb->size = __cpu_to_le64(size*2ULL); | |
612 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
613 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
614 | ||
615 | sb->data_offset = __cpu_to_le64(0); | |
616 | sb->data_size = __cpu_to_le64(0); | |
617 | sb->super_offset = __cpu_to_le64(0); | |
618 | sb->recovery_offset = __cpu_to_le64(0); | |
619 | ||
620 | sb->utime = sb->ctime; | |
621 | sb->events = __cpu_to_le64(1); | |
622 | if (info->state & (1<<MD_SB_CLEAN)) | |
623 | sb->resync_offset = ~0ULL; | |
624 | else | |
625 | sb->resync_offset = 0; | |
626 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ | |
627 | sizeof(sb->dev_roles[0])); | |
628 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
629 | ||
630 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
631 | ||
632 | *sbp = sb; | |
633 | return 1; | |
634 | } | |
635 | ||
636 | /* Add a device to the superblock being created */ | |
637 | static void add_to_super1(void *sbv, mdu_disk_info_t *dk) | |
638 | { | |
639 | struct mdp_superblock_1 *sb = sbv; | |
640 | __u16 *rp = sb->dev_roles + dk->number; | |
641 | if ((dk->state & 6) == 6) /* active, sync */ | |
642 | *rp = __cpu_to_le16(dk->raid_disk); | |
643 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ | |
644 | *rp = 0xffff; | |
645 | else | |
646 | *rp = 0xfffe; | |
647 | } | |
648 | ||
649 | static void locate_bitmap1(struct supertype *st, int fd, void *sbv); | |
650 | ||
651 | static int store_super1(struct supertype *st, int fd, void *sbv) | |
652 | { | |
653 | struct mdp_superblock_1 *sb = sbv; | |
654 | unsigned long long sb_offset; | |
655 | int sbsize; | |
656 | unsigned long size; | |
657 | unsigned long long dsize; | |
658 | ||
659 | #ifdef BLKGETSIZE64 | |
660 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
661 | #endif | |
662 | { | |
663 | if (ioctl(fd, BLKGETSIZE, &size)) | |
664 | return 1; | |
665 | else | |
666 | dsize = (unsigned long long)size; | |
667 | } else | |
668 | dsize >>= 9; | |
669 | ||
670 | if (dsize < 24) | |
671 | return 2; | |
672 | ||
673 | /* | |
674 | * Calculate the position of the superblock. | |
675 | * It is always aligned to a 4K boundary and | |
676 | * depending on minor_version, it can be: | |
677 | * 0: At least 8K, but less than 12K, from end of device | |
678 | * 1: At start of device | |
679 | * 2: 4K from start of device. | |
680 | */ | |
681 | switch(st->minor_version) { | |
682 | case 0: | |
683 | sb_offset = dsize; | |
684 | sb_offset -= 8*2; | |
685 | sb_offset &= ~(4*2-1); | |
686 | break; | |
687 | case 1: | |
688 | sb_offset = 0; | |
689 | break; | |
690 | case 2: | |
691 | sb_offset = 4*2; | |
692 | break; | |
693 | default: | |
694 | return -EINVAL; | |
695 | } | |
696 | ||
697 | ||
698 | ||
699 | if (sb_offset != __le64_to_cpu(sb->super_offset) && | |
700 | 0 != __le64_to_cpu(sb->super_offset) | |
701 | ) { | |
702 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
703 | abort(); | |
704 | } | |
705 | ||
706 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) | |
707 | return 3; | |
708 | ||
709 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
710 | ||
711 | if (write(fd, sb, sbsize) != sbsize) | |
712 | return 4; | |
713 | ||
714 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
715 | struct bitmap_super_s *bm = (struct bitmap_super_s*) | |
716 | (((char*)sb)+1024); | |
717 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { | |
718 | locate_bitmap1(st, fd, sbv); | |
719 | if (write(fd, bm, sizeof(*bm)) != sizeof(*bm)) | |
720 | return 5; | |
721 | } | |
722 | } | |
723 | fsync(fd); | |
724 | return 0; | |
725 | } | |
726 | ||
727 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname); | |
728 | ||
729 | static int write_init_super1(struct supertype *st, void *sbv, | |
730 | mdu_disk_info_t *dinfo, char *devname) | |
731 | { | |
732 | struct mdp_superblock_1 *sb = sbv; | |
733 | void *refsbv = NULL; | |
734 | int fd = open(devname, O_RDWR | O_EXCL); | |
735 | int rfd; | |
736 | int rv; | |
737 | ||
738 | unsigned long size, space; | |
739 | unsigned long long dsize, array_size; | |
740 | long long sb_offset; | |
741 | ||
742 | ||
743 | if (fd < 0) { | |
744 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", | |
745 | devname); | |
746 | return -1; | |
747 | } | |
748 | ||
749 | sb->dev_number = __cpu_to_le32(dinfo->number); | |
750 | if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY)) | |
751 | sb->devflags |= WriteMostly1; | |
752 | ||
753 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
754 | read(rfd, sb->device_uuid, 16) != 16) { | |
755 | *(__u32*)(sb->device_uuid) = random(); | |
756 | *(__u32*)(sb->device_uuid+4) = random(); | |
757 | *(__u32*)(sb->device_uuid+8) = random(); | |
758 | *(__u32*)(sb->device_uuid+12) = random(); | |
759 | } | |
760 | if (rfd >= 0) close(rfd); | |
761 | sb->events = 0; | |
762 | ||
763 | if (load_super1(st, fd, &refsbv, NULL)==0) { | |
764 | struct mdp_superblock_1 *refsb = refsbv; | |
765 | ||
766 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
767 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
768 | /* same array, so preserve events and dev_number */ | |
769 | sb->events = refsb->events; | |
770 | sb->dev_number = refsb->dev_number; | |
771 | } | |
772 | free(refsb); | |
773 | } | |
774 | ||
775 | #ifdef BLKGETSIZE64 | |
776 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
777 | #endif | |
778 | { | |
779 | if (ioctl(fd, BLKGETSIZE, &size)) | |
780 | return 1; | |
781 | else | |
782 | dsize = size; | |
783 | } else | |
784 | dsize >>= 9; | |
785 | ||
786 | if (dsize < 24) { | |
787 | close(fd); | |
788 | return 2; | |
789 | } | |
790 | ||
791 | ||
792 | /* | |
793 | * Calculate the position of the superblock. | |
794 | * It is always aligned to a 4K boundary and | |
795 | * depending on minor_version, it can be: | |
796 | * 0: At least 8K, but less than 12K, from end of device | |
797 | * 1: At start of device | |
798 | * 2: 4K from start of device. | |
799 | * Depending on the array size, we might leave extra space | |
800 | * for a bitmap. | |
801 | */ | |
802 | array_size = __le64_to_cpu(sb->size); | |
803 | switch(st->minor_version) { | |
804 | case 0: | |
805 | sb_offset = dsize; | |
806 | sb_offset -= 8*2; | |
807 | sb_offset &= ~(4*2-1); | |
808 | sb->super_offset = __cpu_to_le64(sb_offset); | |
809 | sb->data_offset = __cpu_to_le64(0); | |
810 | if (sb_offset-64*2 >= array_size && array_size > 8*1024*1024*2) | |
811 | sb->data_size = __cpu_to_le64(sb_offset-64*2); | |
812 | else | |
813 | sb->data_size = __cpu_to_le64(sb_offset); | |
814 | break; | |
815 | case 1: | |
816 | sb->super_offset = __cpu_to_le64(0); | |
817 | if (dsize - 64*2 >= array_size && array_size > 8*1024*1024*2) | |
818 | space = 64*2; | |
819 | else | |
820 | space = 4*2; | |
821 | sb->data_offset = __cpu_to_le64(space); /* leave space for super and bitmap */ | |
822 | sb->data_size = __cpu_to_le64(dsize - space); | |
823 | break; | |
824 | case 2: | |
825 | sb_offset = 4*2; | |
826 | if (dsize - 4*2 - 64*2 >= array_size && array_size > 8*1024*1024*2) | |
827 | space = 64*2; | |
828 | else | |
829 | space = 4*2; | |
830 | sb->super_offset = __cpu_to_le64(sb_offset); | |
831 | sb->data_offset = __cpu_to_le64(sb_offset+space); | |
832 | sb->data_size = __cpu_to_le64(dsize - 4*2 - space); | |
833 | break; | |
834 | default: | |
835 | return -EINVAL; | |
836 | } | |
837 | ||
838 | ||
839 | sb->sb_csum = calc_sb_1_csum(sb); | |
840 | rv = store_super1(st, fd, sb); | |
841 | if (rv) | |
842 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
843 | ||
844 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) | |
845 | rv = st->ss->write_bitmap(st, fd, sbv); | |
846 | close(fd); | |
847 | return rv; | |
848 | } | |
849 | ||
850 | static int compare_super1(void **firstp, void *secondv) | |
851 | { | |
852 | /* | |
853 | * return: | |
854 | * 0 same, or first was empty, and second was copied | |
855 | * 1 second had wrong number | |
856 | * 2 wrong uuid | |
857 | * 3 wrong other info | |
858 | */ | |
859 | struct mdp_superblock_1 *first = *firstp; | |
860 | struct mdp_superblock_1 *second = secondv; | |
861 | ||
862 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
863 | return 1; | |
864 | if (second->major_version != __cpu_to_le32(1)) | |
865 | return 1; | |
866 | ||
867 | if (!first) { | |
868 | first = malloc(1024+sizeof(bitmap_super_t)); | |
869 | memcpy(first, second, 1024+sizeof(bitmap_super_t)); | |
870 | *firstp = first; | |
871 | return 0; | |
872 | } | |
873 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
874 | return 2; | |
875 | ||
876 | if (first->ctime != second->ctime || | |
877 | first->level != second->level || | |
878 | first->layout != second->layout || | |
879 | first->size != second->size || | |
880 | first->chunksize != second->chunksize || | |
881 | first->raid_disks != second->raid_disks) | |
882 | return 3; | |
883 | return 0; | |
884 | } | |
885 | ||
886 | static int load_super1(struct supertype *st, int fd, void **sbp, char *devname) | |
887 | { | |
888 | unsigned long size; | |
889 | unsigned long long dsize; | |
890 | unsigned long long sb_offset; | |
891 | struct mdp_superblock_1 *super; | |
892 | int uuid[4]; | |
893 | struct bitmap_super_s *bsb; | |
894 | ||
895 | ||
896 | if (st->ss == NULL) { | |
897 | int bestvers = -1; | |
898 | __u64 bestctime = 0; | |
899 | /* guess... choose latest ctime */ | |
900 | st->ss = &super1; | |
901 | for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) { | |
902 | switch(load_super1(st, fd, sbp, devname)) { | |
903 | case 0: super = *sbp; | |
904 | if (bestvers == -1 || | |
905 | bestctime < __le64_to_cpu(super->ctime)) { | |
906 | bestvers = st->minor_version; | |
907 | bestctime = __le64_to_cpu(super->ctime); | |
908 | } | |
909 | free(super); | |
910 | *sbp = NULL; | |
911 | break; | |
912 | case 1: st->ss = NULL; return 1; /*bad device */ | |
913 | case 2: break; /* bad, try next */ | |
914 | } | |
915 | } | |
916 | if (bestvers != -1) { | |
917 | int rv; | |
918 | st->minor_version = bestvers; | |
919 | st->ss = &super1; | |
920 | st->max_devs = 384; | |
921 | rv = load_super1(st, fd, sbp, devname); | |
922 | if (rv) st->ss = NULL; | |
923 | return rv; | |
924 | } | |
925 | st->ss = NULL; | |
926 | return 2; | |
927 | } | |
928 | #ifdef BLKGETSIZE64 | |
929 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
930 | #endif | |
931 | { | |
932 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
933 | if (devname) | |
934 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
935 | devname, strerror(errno)); | |
936 | return 1; | |
937 | } | |
938 | dsize = size; | |
939 | } else | |
940 | dsize >>= 9; | |
941 | ||
942 | if (dsize < 24) { | |
943 | if (devname) | |
944 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", | |
945 | devname, dsize); | |
946 | return 1; | |
947 | } | |
948 | ||
949 | /* | |
950 | * Calculate the position of the superblock. | |
951 | * It is always aligned to a 4K boundary and | |
952 | * depending on minor_version, it can be: | |
953 | * 0: At least 8K, but less than 12K, from end of device | |
954 | * 1: At start of device | |
955 | * 2: 4K from start of device. | |
956 | */ | |
957 | switch(st->minor_version) { | |
958 | case 0: | |
959 | sb_offset = dsize; | |
960 | sb_offset -= 8*2; | |
961 | sb_offset &= ~(4*2-1); | |
962 | break; | |
963 | case 1: | |
964 | sb_offset = 0; | |
965 | break; | |
966 | case 2: | |
967 | sb_offset = 4*2; | |
968 | break; | |
969 | default: | |
970 | return -EINVAL; | |
971 | } | |
972 | ||
973 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
974 | ||
975 | ||
976 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
977 | if (devname) | |
978 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
979 | devname, strerror(errno)); | |
980 | return 1; | |
981 | } | |
982 | ||
983 | super = malloc(1024 + sizeof(bitmap_super_t)); | |
984 | ||
985 | if (read(fd, super, 1024) != 1024) { | |
986 | if (devname) | |
987 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
988 | devname); | |
989 | free(super); | |
990 | return 1; | |
991 | } | |
992 | ||
993 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
994 | if (devname) | |
995 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
996 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
997 | free(super); | |
998 | return 2; | |
999 | } | |
1000 | ||
1001 | if (__le32_to_cpu(super->major_version) != 1) { | |
1002 | if (devname) | |
1003 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
1004 | devname, __le32_to_cpu(super->major_version)); | |
1005 | free(super); | |
1006 | return 2; | |
1007 | } | |
1008 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
1009 | if (devname) | |
1010 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
1011 | devname); | |
1012 | free(super); | |
1013 | return 2; | |
1014 | } | |
1015 | *sbp = super; | |
1016 | ||
1017 | /* Now check on the bitmap superblock */ | |
1018 | if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0) | |
1019 | return 0; | |
1020 | /* Read the bitmap superblock and make sure it looks | |
1021 | * valid. If it doesn't clear the bit. An --assemble --force | |
1022 | * should get that written out. | |
1023 | */ | |
1024 | locate_bitmap1(st, fd, super); | |
1025 | if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s)) | |
1026 | != sizeof(struct bitmap_super_s)) | |
1027 | goto no_bitmap; | |
1028 | ||
1029 | uuid_from_super1(uuid, super); | |
1030 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1031 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
1032 | memcmp(bsb->uuid, uuid, 16) != 0) | |
1033 | goto no_bitmap; | |
1034 | return 0; | |
1035 | ||
1036 | no_bitmap: | |
1037 | super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1); | |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | ||
1042 | static struct supertype *match_metadata_desc1(char *arg) | |
1043 | { | |
1044 | struct supertype *st = malloc(sizeof(*st)); | |
1045 | if (!st) return st; | |
1046 | ||
1047 | st->ss = &super1; | |
1048 | st->max_devs = 384; | |
1049 | if (strcmp(arg, "1") == 0 || | |
1050 | strcmp(arg, "1.0") == 0 || | |
1051 | strcmp(arg, "default/large") == 0) { | |
1052 | st->minor_version = 0; | |
1053 | return st; | |
1054 | } | |
1055 | if (strcmp(arg, "1.1") == 0) { | |
1056 | st->minor_version = 1; | |
1057 | return st; | |
1058 | } | |
1059 | if (strcmp(arg, "1.2") == 0) { | |
1060 | st->minor_version = 2; | |
1061 | return st; | |
1062 | } | |
1063 | ||
1064 | free(st); | |
1065 | return NULL; | |
1066 | } | |
1067 | ||
1068 | /* find available size on device with this devsize, using | |
1069 | * superblock type st, and reserving 'reserve' sectors for | |
1070 | * a possible bitmap | |
1071 | */ | |
1072 | static __u64 avail_size1(struct supertype *st, __u64 devsize) | |
1073 | { | |
1074 | if (devsize < 24) | |
1075 | return 0; | |
1076 | ||
1077 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, | |
1078 | * if biffer than 200Gig, save 128k | |
1079 | */ | |
1080 | if (devsize > 200*1024*1024*2) | |
1081 | devsize -= 128*2; | |
1082 | else if (devsize > 8*1024*1024*2) | |
1083 | devsize -= 64*2; | |
1084 | ||
1085 | switch(st->minor_version) { | |
1086 | case 0: | |
1087 | /* at end */ | |
1088 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
1089 | case 1: | |
1090 | /* at start, 4K for superblock and possible bitmap */ | |
1091 | return devsize - 4*2; | |
1092 | case 2: | |
1093 | /* 4k from start, 4K for superblock and possible bitmap */ | |
1094 | return devsize - (4+4)*2; | |
1095 | } | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static int | |
1100 | add_internal_bitmap1(struct supertype *st, void *sbv, | |
1101 | int chunk, int delay, int write_behind, unsigned long long size, | |
1102 | int may_change, int major) | |
1103 | { | |
1104 | /* | |
1105 | * If not may_change, then this is a 'Grow', and the bitmap | |
1106 | * must fit after the superblock. | |
1107 | * If may_change, then this is create, and we can put the bitmap | |
1108 | * before the superblock if we like, or may move the start. | |
1109 | * For now, just squeeze the bitmap into 3k and don't change anything. | |
1110 | * | |
1111 | * size is in sectors, chunk is in bytes !!! | |
1112 | */ | |
1113 | ||
1114 | unsigned long long bits; | |
1115 | unsigned long long max_bits = (3*512 - sizeof(bitmap_super_t)) * 8; | |
1116 | unsigned long long min_chunk; | |
1117 | struct mdp_superblock_1 *sb = sbv; | |
1118 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
1119 | ||
1120 | if (st->minor_version && !may_change && | |
1121 | __le64_to_cpu(sb->data_offset) - __le64_to_cpu(sb->super_offset) < 8) | |
1122 | return 0; /* doesn't fit */ | |
1123 | ||
1124 | ||
1125 | ||
1126 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
1127 | bits = (size*512)/min_chunk +1; | |
1128 | while (bits > max_bits) { | |
1129 | min_chunk *= 2; | |
1130 | bits = (bits+1)/2; | |
1131 | } | |
1132 | if (chunk == UnSet) | |
1133 | chunk = min_chunk; | |
1134 | else if (chunk < min_chunk) | |
1135 | return 0; /* chunk size too small */ | |
1136 | if (chunk == 0) /* rounding problem */ | |
1137 | return 0; | |
1138 | ||
1139 | sb->bitmap_offset = __cpu_to_le32(2); | |
1140 | ||
1141 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
1142 | memset(bms, 0, sizeof(*bms)); | |
1143 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); | |
1144 | bms->version = __cpu_to_le32(major); | |
1145 | uuid_from_super1((int*)bms->uuid, sb); | |
1146 | bms->chunksize = __cpu_to_le32(chunk); | |
1147 | bms->daemon_sleep = __cpu_to_le32(delay); | |
1148 | bms->sync_size = __cpu_to_le64(size); | |
1149 | bms->write_behind = __cpu_to_le32(write_behind); | |
1150 | ||
1151 | return 1; | |
1152 | } | |
1153 | ||
1154 | ||
1155 | static void locate_bitmap1(struct supertype *st, int fd, void *sbv) | |
1156 | { | |
1157 | unsigned long long offset; | |
1158 | struct mdp_superblock_1 *sb; | |
1159 | int mustfree = 0; | |
1160 | ||
1161 | if (!sbv) { | |
1162 | if (st->ss->load_super(st, fd, &sbv, NULL)) | |
1163 | return; /* no error I hope... */ | |
1164 | mustfree = 1; | |
1165 | } | |
1166 | sb = sbv; | |
1167 | ||
1168 | offset = __le64_to_cpu(sb->super_offset); | |
1169 | offset += (long) __le32_to_cpu(sb->bitmap_offset); | |
1170 | if (mustfree) | |
1171 | free(sb); | |
1172 | lseek64(fd, offset<<9, 0); | |
1173 | } | |
1174 | ||
1175 | static int write_bitmap1(struct supertype *st, int fd, void *sbv) | |
1176 | { | |
1177 | struct mdp_superblock_1 *sb = sbv; | |
1178 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); | |
1179 | int rv = 0; | |
1180 | ||
1181 | int towrite, n; | |
1182 | char buf[4096]; | |
1183 | ||
1184 | locate_bitmap1(st, fd, sbv); | |
1185 | ||
1186 | if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) != | |
1187 | sizeof(bitmap_super_t)) | |
1188 | return -2; | |
1189 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); | |
1190 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
1191 | memset(buf, 0xff, sizeof(buf)); | |
1192 | while (towrite > 0) { | |
1193 | n = towrite; | |
1194 | if (n > sizeof(buf)) | |
1195 | n = sizeof(buf); | |
1196 | n = write(fd, buf, n); | |
1197 | if (n > 0) | |
1198 | towrite -= n; | |
1199 | else | |
1200 | break; | |
1201 | } | |
1202 | fsync(fd); | |
1203 | if (towrite) | |
1204 | rv = -2; | |
1205 | ||
1206 | return rv; | |
1207 | } | |
1208 | ||
1209 | struct superswitch super1 = { | |
1210 | #ifndef MDASSEMBLE | |
1211 | .examine_super = examine_super1, | |
1212 | .brief_examine_super = brief_examine_super1, | |
1213 | .detail_super = detail_super1, | |
1214 | .brief_detail_super = brief_detail_super1, | |
1215 | #endif | |
1216 | .match_home = match_home1, | |
1217 | .uuid_from_super = uuid_from_super1, | |
1218 | .getinfo_super = getinfo_super1, | |
1219 | .update_super = update_super1, | |
1220 | .event_super = event_super1, | |
1221 | .init_super = init_super1, | |
1222 | .add_to_super = add_to_super1, | |
1223 | .store_super = store_super1, | |
1224 | .write_init_super = write_init_super1, | |
1225 | .compare_super = compare_super1, | |
1226 | .load_super = load_super1, | |
1227 | .match_metadata_desc = match_metadata_desc1, | |
1228 | .avail_size = avail_size1, | |
1229 | .add_internal_bitmap = add_internal_bitmap1, | |
1230 | .locate_bitmap = locate_bitmap1, | |
1231 | .write_bitmap = write_bitmap1, | |
1232 | .major = 1, | |
1233 | #if __BYTE_ORDER == BIG_ENDIAN | |
1234 | .swapuuid = 0, | |
1235 | #else | |
1236 | .swapuuid = 1, | |
1237 | #endif | |
1238 | }; |