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Update tests and add linear-add
[thirdparty/mdadm.git] / super1.c
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(void *sbv, char *homehost)
146 {
147 struct mdp_superblock_1 *sb = sbv;
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
156 printf(" Magic : %08x\n", __le32_to_cpu(sb->magic));
157 printf(" Version : %02d\n", 1);
158 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map));
159 printf(" Array UUID : ");
160 for (i=0; i<16; i++) {
161 if ((i&3)==0 && i != 0) printf(":");
162 printf("%02x", sb->set_uuid[i]);
163 }
164 printf("\n");
165 printf(" Name : %.32s", sb->set_name);
166 if (l > 0 && l < 32 &&
167 sb->set_name[l] == ':' &&
168 strncmp(sb->set_name, homehost, l) == 0)
169 printf(" (local to host %s)", homehost);
170 printf("\n");
171 atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL;
172 printf(" Creation Time : %.24s\n", ctime(&atime));
173 c=map_num(pers, __le32_to_cpu(sb->level));
174 printf(" Raid Level : %s\n", c?c:"-unknown-");
175 printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks));
176 printf("\n");
177 printf(" Used Dev Size : %llu%s\n",
178 (unsigned long long)__le64_to_cpu(sb->data_size),
179 human_size(__le64_to_cpu(sb->data_size)<<9));
180 if (__le32_to_cpu(sb->level) >= 0) {
181 int ddsks=0;
182 switch(__le32_to_cpu(sb->level)) {
183 case 1: ddsks=1;break;
184 case 4:
185 case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break;
186 case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break;
187 case 10:
188 layout = __le32_to_cpu(sb->layout);
189 ddsks = __le32_to_cpu(sb->raid_disks)
190 / (layout&255) / ((layout>>8)&255);
191 }
192 if (ddsks)
193 printf(" Array Size : %llu%s\n",
194 ddsks*(unsigned long long)__le64_to_cpu(sb->size),
195 human_size(ddsks*__le64_to_cpu(sb->size)<<9));
196 if (sb->size != sb->data_size)
197 printf(" Used Size : %llu%s\n",
198 (unsigned long long)__le64_to_cpu(sb->size),
199 human_size(__le64_to_cpu(sb->size)<<9));
200 }
201 if (sb->data_offset)
202 printf(" Data Offset : %llu sectors\n",
203 (unsigned long long)__le64_to_cpu(sb->data_offset));
204 printf(" Super Offset : %llu sectors\n",
205 (unsigned long long)__le64_to_cpu(sb->super_offset));
206 if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)
207 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset));
208 printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
209 printf(" Device UUID : ");
210 for (i=0; i<16; i++) {
211 if ((i&3)==0 && i != 0) printf(":");
212 printf("%02x", sb->device_uuid[i]);
213 }
214 printf("\n");
215 printf("\n");
216 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
217 printf("Internal Bitmap : %ld sectors from superblock\n",
218 (long)(int32_t)__le32_to_cpu(sb->bitmap_offset));
219 }
220 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
221 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2,
222 human_size(__le64_to_cpu(sb->reshape_position)<<9));
223 if (__le32_to_cpu(sb->delta_disks)) {
224 printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks));
225 if (__le32_to_cpu(sb->delta_disks))
226 printf(" (%d->%d)\n",
227 __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks),
228 __le32_to_cpu(sb->raid_disks));
229 else
230 printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks),
231 __le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks));
232 }
233 if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) {
234 c = map_num(pers, __le32_to_cpu(sb->new_level));
235 printf(" New Level : %s\n", c?c:"-unknown-");
236 }
237 if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) {
238 if (__le32_to_cpu(sb->level) == 5) {
239 c = map_num(r5layout, __le32_to_cpu(sb->new_layout));
240 printf(" New Layout : %s\n", c?c:"-unknown-");
241 }
242 if (__le32_to_cpu(sb->level) == 10) {
243 printf(" New Layout : near=%d, %s=%d\n",
244 __le32_to_cpu(sb->new_layout)&255,
245 (__le32_to_cpu(sb->new_layout)&0x10000)?"offset":"far",
246 (__le32_to_cpu(sb->new_layout)>>8)&255);
247 }
248 }
249 if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize))
250 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2);
251 printf("\n");
252 }
253 if (sb->devflags) {
254 printf(" Flags :");
255 if (sb->devflags & WriteMostly1)
256 printf(" write-mostly");
257 printf("\n");
258 }
259
260 atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL;
261 printf(" Update Time : %.24s\n", ctime(&atime));
262
263 if (calc_sb_1_csum(sb) == sb->sb_csum)
264 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum));
265 else
266 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum),
267 __le32_to_cpu(calc_sb_1_csum(sb)));
268 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events));
269 printf("\n");
270 if (__le32_to_cpu(sb->level) == 5) {
271 c = map_num(r5layout, __le32_to_cpu(sb->layout));
272 printf(" Layout : %s\n", c?c:"-unknown-");
273 }
274 if (__le32_to_cpu(sb->level) == 10) {
275 int lo = __le32_to_cpu(sb->layout);
276 printf(" Layout : near=%d, %s=%d\n",
277 lo&255,
278 (lo&0x10000)?"offset":"far",
279 (lo>>8)&255);
280 }
281 switch(__le32_to_cpu(sb->level)) {
282 case 0:
283 case 4:
284 case 5:
285 case 6:
286 case 10:
287 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2);
288 break;
289 case -1:
290 printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2);
291 break;
292 default: break;
293 }
294 printf("\n");
295 printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number));
296 for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--)
297 if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff)
298 break;
299 for (d=0; d < i; d++) {
300 int role = __le16_to_cpu(sb->dev_roles[d]);
301 if (d) printf(", ");
302 if (role == 0xffff) printf("empty");
303 else if(role == 0xfffe) printf("failed");
304 else printf("%d", role);
305 }
306 printf(")\n");
307 printf(" Array State : ");
308 for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) {
309 int cnt = 0;
310 int me = 0;
311 int i;
312 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
313 int role = __le16_to_cpu(sb->dev_roles[i]);
314 if (role == d) {
315 if (i == __le32_to_cpu(sb->dev_number))
316 me = 1;
317 cnt++;
318 }
319 }
320 if (cnt > 1) printf("?");
321 else if (cnt == 1 && me) printf("U");
322 else if (cnt == 1) printf("u");
323 else printf ("_");
324 }
325 faulty = 0;
326 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
327 int role = __le16_to_cpu(sb->dev_roles[i]);
328 if (role == 0xFFFE)
329 faulty++;
330 }
331 if (faulty) printf(" %d failed", faulty);
332 printf("\n");
333 }
334
335
336 static void brief_examine_super1(void *sbv)
337 {
338 struct mdp_superblock_1 *sb = sbv;
339 int i;
340 char *nm;
341 char *c=map_num(pers, __le32_to_cpu(sb->level));
342
343 nm = strchr(sb->set_name, ':');
344 if (nm)
345 nm++;
346 else if (sb->set_name[0])
347 nm = sb->set_name;
348 else
349 nm = "??";
350
351 printf("ARRAY /dev/md/%s level=%s metadata=1 num-devices=%d UUID=",
352 nm,
353 c?c:"-unknown-", __le32_to_cpu(sb->raid_disks));
354 for (i=0; i<16; i++) {
355 if ((i&3)==0 && i != 0) printf(":");
356 printf("%02x", sb->set_uuid[i]);
357 }
358 if (sb->set_name[0])
359 printf(" name=%.32s", sb->set_name);
360 printf("\n");
361 }
362
363 static void detail_super1(void *sbv, char *homehost)
364 {
365 struct mdp_superblock_1 *sb = sbv;
366 int i;
367 int l = homehost ? strlen(homehost) : 0;
368
369 printf(" Name : %.32s", sb->set_name);
370 if (l > 0 && l < 32 &&
371 sb->set_name[l] == ':' &&
372 strncmp(sb->set_name, homehost, l) == 0)
373 printf(" (local to host %s)", homehost);
374 printf("\n UUID : ");
375 for (i=0; i<16; i++) {
376 if ((i&3)==0 && i != 0) printf(":");
377 printf("%02x", sb->set_uuid[i]);
378 }
379 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events));
380 }
381
382 static void brief_detail_super1(void *sbv)
383 {
384 struct mdp_superblock_1 *sb = sbv;
385 int i;
386
387 if (sb->set_name[0])
388 printf(" name=%.32s", sb->set_name);
389 printf(" UUID=");
390 for (i=0; i<16; i++) {
391 if ((i&3)==0 && i != 0) printf(":");
392 printf("%02x", sb->set_uuid[i]);
393 }
394 }
395
396 static void export_super1(void *sbv)
397 {
398 struct mdp_superblock_1 *sb = sbv;
399 int i;
400 int len = 32;
401
402 for (i=0; i<32; i++)
403 if (sb->set_name[i] == '\n' ||
404 sb->set_name[i] == '\0') {
405 len = i;
406 break;
407 }
408 if (len)
409 printf("MD_NAME=%.*s\n", len, sb->set_name);
410 printf("MD_UUID=");
411 for (i=0; i<16; i++) {
412 if ((i&3)==0 && i != 0) printf(":");
413 printf("%02x", sb->set_uuid[i]);
414 }
415 printf("\n");
416 }
417
418 #endif
419
420 static int match_home1(void *sbv, char *homehost)
421 {
422 struct mdp_superblock_1 *sb = sbv;
423 int l = homehost ? strlen(homehost) : 0;
424
425 return (l > 0 && l < 32 &&
426 sb->set_name[l] == ':' &&
427 strncmp(sb->set_name, homehost, l) == 0);
428 }
429
430 static void uuid_from_super1(int uuid[4], void * sbv)
431 {
432 struct mdp_superblock_1 *super = sbv;
433 char *cuuid = (char*)uuid;
434 int i;
435 for (i=0; i<16; i++)
436 cuuid[i] = super->set_uuid[i];
437 }
438
439 static void getinfo_super1(struct mdinfo *info, void *sbv)
440 {
441 struct mdp_superblock_1 *sb = sbv;
442 int working = 0;
443 int i;
444 int role;
445
446 info->array.major_version = 1;
447 info->array.minor_version = __le32_to_cpu(sb->feature_map);
448 info->array.patch_version = 0;
449 info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
450 info->array.level = __le32_to_cpu(sb->level);
451 info->array.layout = __le32_to_cpu(sb->layout);
452 info->array.md_minor = -1;
453 info->array.ctime = __le64_to_cpu(sb->ctime);
454 info->array.utime = __le64_to_cpu(sb->utime);
455 info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
456 info->array.state =
457 (__le64_to_cpu(sb->resync_offset) >= __le64_to_cpu(sb->size))
458 ? 1 : 0;
459
460 info->data_offset = __le64_to_cpu(sb->data_offset);
461 info->component_size = __le64_to_cpu(sb->size);
462
463 info->disk.major = 0;
464 info->disk.minor = 0;
465 info->disk.number = __le32_to_cpu(sb->dev_number);
466 if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
467 __le32_to_cpu(sb->max_dev) > 512)
468 role = 0xfffe;
469 else
470 role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
471
472 info->disk.raid_disk = -1;
473 switch(role) {
474 case 0xFFFF:
475 info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */
476 break;
477 case 0xFFFE:
478 info->disk.state = 1; /* faulty */
479 break;
480 default:
481 info->disk.state = 6; /* active and in sync */
482 info->disk.raid_disk = role;
483 }
484 info->events = __le64_to_cpu(sb->events);
485
486 memcpy(info->uuid, sb->set_uuid, 16);
487
488 strncpy(info->name, sb->set_name, 32);
489 info->name[32] = 0;
490
491 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
492 info->reshape_active = 1;
493 info->reshape_progress = __le64_to_cpu(sb->reshape_position);
494 info->new_level = __le32_to_cpu(sb->new_level);
495 info->delta_disks = __le32_to_cpu(sb->delta_disks);
496 info->new_layout = __le32_to_cpu(sb->new_layout);
497 info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
498 } else
499 info->reshape_active = 0;
500
501 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
502 role = __le16_to_cpu(sb->dev_roles[i]);
503 if (/*role == 0xFFFF || */role < info->array.raid_disks)
504 working++;
505 }
506
507 info->array.working_disks = working;
508 }
509
510 static int update_super1(struct mdinfo *info, void *sbv, char *update,
511 char *devname, int verbose,
512 int uuid_set, char *homehost)
513 {
514 /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
515 * For others, the return value is ignored.
516 */
517 int rv = 0;
518 struct mdp_superblock_1 *sb = sbv;
519
520 if (strcmp(update, "force-one")==0) {
521 /* Not enough devices for a working array,
522 * so bring this one up-to-date
523 */
524 if (sb->events != __cpu_to_le64(info->events))
525 rv = 1;
526 sb->events = __cpu_to_le64(info->events);
527 }
528 if (strcmp(update, "force-array")==0) {
529 /* Degraded array and 'force' requests to
530 * maybe need to mark it 'clean'.
531 */
532 switch(__le32_to_cpu(sb->level)) {
533 case 5: case 4: case 6:
534 /* need to force clean */
535 if (sb->resync_offset != ~0ULL)
536 rv = 1;
537 sb->resync_offset = ~0ULL;
538 }
539 }
540 if (strcmp(update, "assemble")==0) {
541 int d = info->disk.number;
542 int want;
543 if (info->disk.state == 6)
544 want = __cpu_to_le32(info->disk.raid_disk);
545 else
546 want = 0xFFFF;
547 if (sb->dev_roles[d] != want) {
548 sb->dev_roles[d] = want;
549 rv = 1;
550 }
551 }
552 if (strcmp(update, "linear-grow-new") == 0) {
553 int i;
554 int rfd;
555 int max = __le32_to_cpu(sb->max_dev);
556
557 for (i=0 ; i < max ; i++)
558 if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe)
559 break;
560 sb->dev_number = __cpu_to_le32(i);
561 info->disk.number = i;
562 if (max >= __le32_to_cpu(sb->max_dev))
563 sb->max_dev = __cpu_to_le32(max+1);
564
565 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
566 read(rfd, sb->device_uuid, 16) != 16) {
567 *(__u32*)(sb->device_uuid) = random();
568 *(__u32*)(sb->device_uuid+4) = random();
569 *(__u32*)(sb->device_uuid+8) = random();
570 *(__u32*)(sb->device_uuid+12) = random();
571 }
572
573 sb->dev_roles[i] =
574 __cpu_to_le16(info->disk.raid_disk);
575 }
576 if (strcmp(update, "linear-grow-update") == 0) {
577 sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
578 sb->dev_roles[info->disk.number] =
579 __cpu_to_le16(info->disk.raid_disk);
580 }
581 if (strcmp(update, "resync") == 0) {
582 /* make sure resync happens */
583 sb->resync_offset = 0ULL;
584 }
585 if (strcmp(update, "uuid") == 0) {
586 copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
587
588 if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
589 struct bitmap_super_s *bm;
590 bm = (struct bitmap_super_s*)(sbv+1024);
591 memcpy(bm->uuid, sb->set_uuid, 16);
592 }
593 }
594 if (strcmp(update, "homehost") == 0 &&
595 homehost) {
596 char *c;
597 update = "name";
598 c = strchr(sb->set_name, ':');
599 if (c)
600 strncpy(info->name, c+1, 31 - (c-sb->set_name));
601 else
602 strncpy(info->name, sb->set_name, 32);
603 info->name[32] = 0;
604 }
605 if (strcmp(update, "name") == 0) {
606 if (info->name[0] == 0)
607 sprintf(info->name, "%d", info->array.md_minor);
608 memset(sb->set_name, 0, sizeof(sb->set_name));
609 if (homehost &&
610 strchr(info->name, ':') == NULL &&
611 strlen(homehost)+1+strlen(info->name) < 32) {
612 strcpy(sb->set_name, homehost);
613 strcat(sb->set_name, ":");
614 strcat(sb->set_name, info->name);
615 } else
616 strcpy(sb->set_name, info->name);
617 }
618 if (strcmp(update, "devicesize") == 0 &&
619 __le64_to_cpu(sb->super_offset) <
620 __le64_to_cpu(sb->data_offset)) {
621 /* set data_size to device size less data_offset */
622 struct misc_dev_info *misc = (struct misc_dev_info*)
623 (sbv + 1024 + sizeof(struct bitmap_super_s));
624 printf("Size was %llu\n", (unsigned long long)
625 __le64_to_cpu(sb->data_size));
626 sb->data_size = __cpu_to_le64(
627 misc->device_size - __le64_to_cpu(sb->data_offset));
628 printf("Size is %llu\n", (unsigned long long)
629 __le64_to_cpu(sb->data_size));
630 }
631 if (strcmp(update, "_reshape_progress")==0)
632 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
633
634 sb->sb_csum = calc_sb_1_csum(sb);
635 return rv;
636 }
637
638 static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info,
639 unsigned long long size, char *name, char *homehost, int *uuid)
640 {
641 struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t) +
642 sizeof(struct misc_dev_info));
643 int spares;
644 int rfd;
645 char defname[10];
646 memset(sb, 0, 1024);
647
648 if (info->major_version == -1) {
649 /* zeroing superblock */
650 *sbp = sb;
651 return 0;
652 }
653
654 spares = info->working_disks - info->active_disks;
655 if (info->raid_disks + spares > 384) {
656 fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
657 info->raid_disks , spares, 384);
658 return 0;
659 }
660
661 sb->magic = __cpu_to_le32(MD_SB_MAGIC);
662 sb->major_version = __cpu_to_le32(1);
663 sb->feature_map = 0;
664 sb->pad0 = 0;
665
666 if (uuid)
667 copy_uuid(sb->set_uuid, uuid, super1.swapuuid);
668 else {
669 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
670 read(rfd, sb->set_uuid, 16) != 16) {
671 *(__u32*)(sb->set_uuid) = random();
672 *(__u32*)(sb->set_uuid+4) = random();
673 *(__u32*)(sb->set_uuid+8) = random();
674 *(__u32*)(sb->set_uuid+12) = random();
675 }
676 if (rfd >= 0) close(rfd);
677 }
678
679 if (name == NULL || *name == 0) {
680 sprintf(defname, "%d", info->md_minor);
681 name = defname;
682 }
683 memset(sb->set_name, 0, 32);
684 if (homehost &&
685 strchr(name, ':')== NULL &&
686 strlen(homehost)+1+strlen(name) < 32) {
687 strcpy(sb->set_name, homehost);
688 strcat(sb->set_name, ":");
689 strcat(sb->set_name, name);
690 } else
691 strcpy(sb->set_name, name);
692
693 sb->ctime = __cpu_to_le64((unsigned long long)time(0));
694 sb->level = __cpu_to_le32(info->level);
695 sb->layout = __cpu_to_le32(info->layout);
696 sb->size = __cpu_to_le64(size*2ULL);
697 sb->chunksize = __cpu_to_le32(info->chunk_size>>9);
698 sb->raid_disks = __cpu_to_le32(info->raid_disks);
699
700 sb->data_offset = __cpu_to_le64(0);
701 sb->data_size = __cpu_to_le64(0);
702 sb->super_offset = __cpu_to_le64(0);
703 sb->recovery_offset = __cpu_to_le64(0);
704
705 sb->utime = sb->ctime;
706 sb->events = __cpu_to_le64(1);
707 if (info->state & (1<<MD_SB_CLEAN))
708 sb->resync_offset = ~0ULL;
709 else
710 sb->resync_offset = 0;
711 sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/
712 sizeof(sb->dev_roles[0]));
713 memset(sb->pad3, 0, sizeof(sb->pad3));
714
715 memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1));
716
717 *sbp = sb;
718 return 1;
719 }
720
721 /* Add a device to the superblock being created */
722 static void add_to_super1(void *sbv, mdu_disk_info_t *dk)
723 {
724 struct mdp_superblock_1 *sb = sbv;
725 __u16 *rp = sb->dev_roles + dk->number;
726 if ((dk->state & 6) == 6) /* active, sync */
727 *rp = __cpu_to_le16(dk->raid_disk);
728 else if ((dk->state & ~2) == 0) /* active or idle -> spare */
729 *rp = 0xffff;
730 else
731 *rp = 0xfffe;
732 }
733
734 static void locate_bitmap1(struct supertype *st, int fd, void *sbv);
735
736 static int store_super1(struct supertype *st, int fd, void *sbv)
737 {
738 struct mdp_superblock_1 *sb = sbv;
739 unsigned long long sb_offset;
740 int sbsize;
741 unsigned long long dsize;
742
743 if (!get_dev_size(fd, NULL, &dsize))
744 return 1;
745
746 dsize >>= 9;
747
748 if (dsize < 24)
749 return 2;
750
751 /*
752 * Calculate the position of the superblock.
753 * It is always aligned to a 4K boundary and
754 * depending on minor_version, it can be:
755 * 0: At least 8K, but less than 12K, from end of device
756 * 1: At start of device
757 * 2: 4K from start of device.
758 */
759 switch(st->minor_version) {
760 case 0:
761 sb_offset = dsize;
762 sb_offset -= 8*2;
763 sb_offset &= ~(4*2-1);
764 break;
765 case 1:
766 sb_offset = 0;
767 break;
768 case 2:
769 sb_offset = 4*2;
770 break;
771 default:
772 return -EINVAL;
773 }
774
775
776
777 if (sb_offset != __le64_to_cpu(sb->super_offset) &&
778 0 != __le64_to_cpu(sb->super_offset)
779 ) {
780 fprintf(stderr, Name ": internal error - sb_offset is wrong\n");
781 abort();
782 }
783
784 if (lseek64(fd, sb_offset << 9, 0)< 0LL)
785 return 3;
786
787 sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev);
788
789 if (write(fd, sb, sbsize) != sbsize)
790 return 4;
791
792 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
793 struct bitmap_super_s *bm = (struct bitmap_super_s*)
794 (((char*)sb)+1024);
795 if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
796 locate_bitmap1(st, fd, sbv);
797 if (write(fd, bm, sizeof(*bm)) != sizeof(*bm))
798 return 5;
799 }
800 }
801 fsync(fd);
802 return 0;
803 }
804
805 static int load_super1(struct supertype *st, int fd, void **sbp, char *devname);
806
807 static unsigned long choose_bm_space(unsigned long devsize)
808 {
809 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
810 * if bigger than 200Gig, save 128k
811 */
812 if (devsize < 64*2) return 0;
813 if (devsize - 64*2 >= 200*1024*1024*2)
814 return 128*2;
815 if (devsize - 4*2 > 8*1024*1024*2)
816 return 64*2;
817 return 4*2;
818 }
819
820 static int write_init_super1(struct supertype *st, void *sbv,
821 mdu_disk_info_t *dinfo, char *devname)
822 {
823 struct mdp_superblock_1 *sb = sbv;
824 void *refsbv = NULL;
825 int fd = open(devname, O_RDWR | O_EXCL);
826 int rfd;
827 int rv;
828 int bm_space;
829
830 unsigned long long dsize, array_size;
831 long long sb_offset;
832
833
834 if (fd < 0) {
835 fprintf(stderr, Name ": Failed to open %s to write superblock\n",
836 devname);
837 return -1;
838 }
839
840 sb->dev_number = __cpu_to_le32(dinfo->number);
841 if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY))
842 sb->devflags |= __cpu_to_le32(WriteMostly1);
843
844 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
845 read(rfd, sb->device_uuid, 16) != 16) {
846 *(__u32*)(sb->device_uuid) = random();
847 *(__u32*)(sb->device_uuid+4) = random();
848 *(__u32*)(sb->device_uuid+8) = random();
849 *(__u32*)(sb->device_uuid+12) = random();
850 }
851 if (rfd >= 0) close(rfd);
852 sb->events = 0;
853
854 if (load_super1(st, fd, &refsbv, NULL)==0) {
855 struct mdp_superblock_1 *refsb = refsbv;
856
857 memcpy(sb->device_uuid, refsb->device_uuid, 16);
858 if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
859 /* same array, so preserve events and dev_number */
860 sb->events = refsb->events;
861 /* bugs in 2.6.17 and earlier mean the dev_number
862 * chosen in Manage must be preserved
863 */
864 if (get_linux_version() >= 2006018)
865 sb->dev_number = refsb->dev_number;
866 }
867 free(refsb);
868 }
869
870 if (!get_dev_size(fd, NULL, &dsize))
871 return 1;
872 dsize >>= 9;
873
874 if (dsize < 24) {
875 close(fd);
876 return 2;
877 }
878
879
880 /*
881 * Calculate the position of the superblock.
882 * It is always aligned to a 4K boundary and
883 * depending on minor_version, it can be:
884 * 0: At least 8K, but less than 12K, from end of device
885 * 1: At start of device
886 * 2: 4K from start of device.
887 * Depending on the array size, we might leave extra space
888 * for a bitmap.
889 */
890 array_size = __le64_to_cpu(sb->size);
891 /* work out how much space we left of a bitmap */
892 bm_space = choose_bm_space(array_size);
893
894 switch(st->minor_version) {
895 case 0:
896 sb_offset = dsize;
897 sb_offset -= 8*2;
898 sb_offset &= ~(4*2-1);
899 sb->super_offset = __cpu_to_le64(sb_offset);
900 sb->data_offset = __cpu_to_le64(0);
901 sb->data_size = __cpu_to_le64(sb_offset - bm_space);
902 break;
903 case 1:
904 sb->super_offset = __cpu_to_le64(0);
905 sb->data_offset = __cpu_to_le64(bm_space + 4*2);
906 sb->data_size = __cpu_to_le64(dsize - bm_space - 4*2);
907 break;
908 case 2:
909 sb_offset = 4*2;
910 sb->super_offset = __cpu_to_le64(4*2);
911 sb->data_offset = __cpu_to_le64(4*2 + 4*2 + bm_space);
912 sb->data_size = __cpu_to_le64(dsize - 4*2 - 4*2 - bm_space );
913 break;
914 default:
915 return -EINVAL;
916 }
917
918
919 sb->sb_csum = calc_sb_1_csum(sb);
920 rv = store_super1(st, fd, sb);
921 if (rv)
922 fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
923
924 if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1))
925 rv = st->ss->write_bitmap(st, fd, sbv);
926 close(fd);
927 return rv;
928 }
929
930 static int compare_super1(void **firstp, void *secondv)
931 {
932 /*
933 * return:
934 * 0 same, or first was empty, and second was copied
935 * 1 second had wrong number
936 * 2 wrong uuid
937 * 3 wrong other info
938 */
939 struct mdp_superblock_1 *first = *firstp;
940 struct mdp_superblock_1 *second = secondv;
941
942 if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
943 return 1;
944 if (second->major_version != __cpu_to_le32(1))
945 return 1;
946
947 if (!first) {
948 first = malloc(1024+sizeof(bitmap_super_t) +
949 sizeof(struct misc_dev_info));
950 memcpy(first, second, 1024+sizeof(bitmap_super_t) +
951 sizeof(struct misc_dev_info));
952 *firstp = first;
953 return 0;
954 }
955 if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
956 return 2;
957
958 if (first->ctime != second->ctime ||
959 first->level != second->level ||
960 first->layout != second->layout ||
961 first->size != second->size ||
962 first->chunksize != second->chunksize ||
963 first->raid_disks != second->raid_disks)
964 return 3;
965 return 0;
966 }
967
968 static int load_super1(struct supertype *st, int fd, void **sbp, char *devname)
969 {
970 unsigned long long dsize;
971 unsigned long long sb_offset;
972 struct mdp_superblock_1 *super;
973 int uuid[4];
974 struct bitmap_super_s *bsb;
975 struct misc_dev_info *misc;
976
977
978 if (st->ss == NULL) {
979 int bestvers = -1;
980 __u64 bestctime = 0;
981 /* guess... choose latest ctime */
982 st->ss = &super1;
983 for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) {
984 switch(load_super1(st, fd, sbp, devname)) {
985 case 0: super = *sbp;
986 if (bestvers == -1 ||
987 bestctime < __le64_to_cpu(super->ctime)) {
988 bestvers = st->minor_version;
989 bestctime = __le64_to_cpu(super->ctime);
990 }
991 free(super);
992 *sbp = NULL;
993 break;
994 case 1: st->ss = NULL; return 1; /*bad device */
995 case 2: break; /* bad, try next */
996 }
997 }
998 if (bestvers != -1) {
999 int rv;
1000 st->minor_version = bestvers;
1001 st->ss = &super1;
1002 st->max_devs = 384;
1003 rv = load_super1(st, fd, sbp, devname);
1004 if (rv) st->ss = NULL;
1005 return rv;
1006 }
1007 st->ss = NULL;
1008 return 2;
1009 }
1010 if (!get_dev_size(fd, devname, &dsize))
1011 return 1;
1012 dsize >>= 9;
1013
1014 if (dsize < 24) {
1015 if (devname)
1016 fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n",
1017 devname, dsize);
1018 return 1;
1019 }
1020
1021 /*
1022 * Calculate the position of the superblock.
1023 * It is always aligned to a 4K boundary and
1024 * depending on minor_version, it can be:
1025 * 0: At least 8K, but less than 12K, from end of device
1026 * 1: At start of device
1027 * 2: 4K from start of device.
1028 */
1029 switch(st->minor_version) {
1030 case 0:
1031 sb_offset = dsize;
1032 sb_offset -= 8*2;
1033 sb_offset &= ~(4*2-1);
1034 break;
1035 case 1:
1036 sb_offset = 0;
1037 break;
1038 case 2:
1039 sb_offset = 4*2;
1040 break;
1041 default:
1042 return -EINVAL;
1043 }
1044
1045 ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
1046
1047
1048 if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
1049 if (devname)
1050 fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
1051 devname, strerror(errno));
1052 return 1;
1053 }
1054
1055 super = malloc(1024 + sizeof(bitmap_super_t) +
1056 sizeof(struct misc_dev_info));
1057
1058 if (read(fd, super, 1024) != 1024) {
1059 if (devname)
1060 fprintf(stderr, Name ": Cannot read superblock on %s\n",
1061 devname);
1062 free(super);
1063 return 1;
1064 }
1065
1066 if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) {
1067 if (devname)
1068 fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
1069 devname, MD_SB_MAGIC, __le32_to_cpu(super->magic));
1070 free(super);
1071 return 2;
1072 }
1073
1074 if (__le32_to_cpu(super->major_version) != 1) {
1075 if (devname)
1076 fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
1077 devname, __le32_to_cpu(super->major_version));
1078 free(super);
1079 return 2;
1080 }
1081 if (__le64_to_cpu(super->super_offset) != sb_offset) {
1082 if (devname)
1083 fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n",
1084 devname);
1085 free(super);
1086 return 2;
1087 }
1088 *sbp = super;
1089
1090 bsb = (struct bitmap_super_s *)(((char*)super)+1024);
1091
1092 misc = (struct misc_dev_info*) (bsb+1);
1093 misc->device_size = dsize;
1094
1095 /* Now check on the bitmap superblock */
1096 if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
1097 return 0;
1098 /* Read the bitmap superblock and make sure it looks
1099 * valid. If it doesn't clear the bit. An --assemble --force
1100 * should get that written out.
1101 */
1102 locate_bitmap1(st, fd, super);
1103 if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s))
1104 != sizeof(struct bitmap_super_s))
1105 goto no_bitmap;
1106
1107 uuid_from_super1(uuid, super);
1108 if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
1109 memcmp(bsb->uuid, uuid, 16) != 0)
1110 goto no_bitmap;
1111 return 0;
1112
1113 no_bitmap:
1114 super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1);
1115 return 0;
1116 }
1117
1118
1119 static struct supertype *match_metadata_desc1(char *arg)
1120 {
1121 struct supertype *st = malloc(sizeof(*st));
1122 if (!st) return st;
1123
1124 st->ss = &super1;
1125 st->max_devs = 384;
1126 if (strcmp(arg, "1") == 0 ||
1127 strcmp(arg, "1.0") == 0 ||
1128 strcmp(arg, "default/large") == 0) {
1129 st->minor_version = 0;
1130 return st;
1131 }
1132 if (strcmp(arg, "1.1") == 0) {
1133 st->minor_version = 1;
1134 return st;
1135 }
1136 if (strcmp(arg, "1.2") == 0) {
1137 st->minor_version = 2;
1138 return st;
1139 }
1140
1141 free(st);
1142 return NULL;
1143 }
1144
1145 /* find available size on device with this devsize, using
1146 * superblock type st, and reserving 'reserve' sectors for
1147 * a possible bitmap
1148 */
1149 static __u64 avail_size1(struct supertype *st, __u64 devsize)
1150 {
1151 if (devsize < 24)
1152 return 0;
1153
1154 devsize -= choose_bm_space(devsize);
1155
1156 switch(st->minor_version) {
1157 case 0:
1158 /* at end */
1159 return ((devsize - 8*2 ) & ~(4*2-1));
1160 case 1:
1161 /* at start, 4K for superblock and possible bitmap */
1162 return devsize - 4*2;
1163 case 2:
1164 /* 4k from start, 4K for superblock and possible bitmap */
1165 return devsize - (4+4)*2;
1166 }
1167 return 0;
1168 }
1169
1170 static int
1171 add_internal_bitmap1(struct supertype *st, void *sbv,
1172 int *chunkp, int delay, int write_behind,
1173 unsigned long long size,
1174 int may_change, int major)
1175 {
1176 /*
1177 * If not may_change, then this is a 'Grow', and the bitmap
1178 * must fit after the superblock.
1179 * If may_change, then this is create, and we can put the bitmap
1180 * before the superblock if we like, or may move the start.
1181 * If !may_change, the bitmap MUST live at offset of 1K, until
1182 * we get a sysfs interface.
1183 *
1184 * size is in sectors, chunk is in bytes !!!
1185 */
1186
1187 unsigned long long bits;
1188 unsigned long long max_bits;
1189 unsigned long long min_chunk;
1190 long offset;
1191 int chunk = *chunkp;
1192 int room = 0;
1193 struct mdp_superblock_1 *sb = sbv;
1194 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024);
1195
1196 switch(st->minor_version) {
1197 case 0:
1198 /* either 3K after the superblock, or some amount of space
1199 * before.
1200 */
1201 if (may_change) {
1202 /* We are creating array, so we *know* how much room has
1203 * been left.
1204 */
1205 offset = 0;
1206 room = choose_bm_space(__le64_to_cpu(sb->size));
1207 if (room == 4*2) {
1208 /* make it 3K after the superblock */
1209 room = 3*2;
1210 offset = 2;
1211 }
1212 } else {
1213 room = __le64_to_cpu(sb->super_offset)
1214 - __le64_to_cpu(sb->data_offset)
1215 - __le64_to_cpu(sb->data_size);
1216 /* remove '1 ||' when we can set offset via sysfs */
1217 if (1 || (room < 3*2 &&
1218 __le32_to_cpu(sb->max_dev) <= 384)) {
1219 room = 3*2;
1220 offset = 1*2;
1221 } else {
1222 offset = 0; /* means movable offset */
1223 }
1224 }
1225 break;
1226 case 1:
1227 case 2: /* between superblock and data */
1228 if (may_change) {
1229 offset = 4*2;
1230 room = choose_bm_space(__le64_to_cpu(sb->size));
1231 } else {
1232 room = __le64_to_cpu(sb->data_offset)
1233 - __le64_to_cpu(sb->super_offset);
1234 if (1 || __le32_to_cpu(sb->max_dev) <= 384) {
1235 room -= 2;
1236 offset = 2;
1237 } else {
1238 room -= 4*2;
1239 offset = 4*2;
1240 }
1241 }
1242 break;
1243 default:
1244 return 0;
1245 }
1246
1247 if (chunk == UnSet && room > 128*2)
1248 /* Limit to 128K of bitmap when chunk size not requested */
1249 room = 128*2;
1250
1251 max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8;
1252
1253 min_chunk = 4096; /* sub-page chunks don't work yet.. */
1254 bits = (size*512)/min_chunk +1;
1255 while (bits > max_bits) {
1256 min_chunk *= 2;
1257 bits = (bits+1)/2;
1258 }
1259 if (chunk == UnSet)
1260 chunk = min_chunk;
1261 else if (chunk < min_chunk)
1262 return 0; /* chunk size too small */
1263 if (chunk == 0) /* rounding problem */
1264 return 0;
1265
1266 if (offset == 0) {
1267 bits = (size*512) / chunk + 1;
1268 room = ((bits+7)/8 + sizeof(bitmap_super_t) +511)/512;
1269 offset = -room;
1270 }
1271
1272 sb->bitmap_offset = __cpu_to_le32(offset);
1273
1274 sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1);
1275 memset(bms, 0, sizeof(*bms));
1276 bms->magic = __cpu_to_le32(BITMAP_MAGIC);
1277 bms->version = __cpu_to_le32(major);
1278 uuid_from_super1((int*)bms->uuid, sb);
1279 bms->chunksize = __cpu_to_le32(chunk);
1280 bms->daemon_sleep = __cpu_to_le32(delay);
1281 bms->sync_size = __cpu_to_le64(size);
1282 bms->write_behind = __cpu_to_le32(write_behind);
1283
1284 *chunkp = chunk;
1285 return 1;
1286 }
1287
1288
1289 static void locate_bitmap1(struct supertype *st, int fd, void *sbv)
1290 {
1291 unsigned long long offset;
1292 struct mdp_superblock_1 *sb;
1293 int mustfree = 0;
1294
1295 if (!sbv) {
1296 if (st->ss->load_super(st, fd, &sbv, NULL))
1297 return; /* no error I hope... */
1298 mustfree = 1;
1299 }
1300 sb = sbv;
1301
1302 offset = __le64_to_cpu(sb->super_offset);
1303 offset += (int32_t) __le32_to_cpu(sb->bitmap_offset);
1304 if (mustfree)
1305 free(sb);
1306 lseek64(fd, offset<<9, 0);
1307 }
1308
1309 static int write_bitmap1(struct supertype *st, int fd, void *sbv)
1310 {
1311 struct mdp_superblock_1 *sb = sbv;
1312 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024);
1313 int rv = 0;
1314
1315 int towrite, n;
1316 char buf[4096];
1317
1318 locate_bitmap1(st, fd, sbv);
1319
1320 if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) !=
1321 sizeof(bitmap_super_t))
1322 return -2;
1323 towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
1324 towrite = (towrite+7) >> 3; /* bits to bytes */
1325 memset(buf, 0xff, sizeof(buf));
1326 while (towrite > 0) {
1327 n = towrite;
1328 if (n > sizeof(buf))
1329 n = sizeof(buf);
1330 n = write(fd, buf, n);
1331 if (n > 0)
1332 towrite -= n;
1333 else
1334 break;
1335 }
1336 fsync(fd);
1337 if (towrite)
1338 rv = -2;
1339
1340 return rv;
1341 }
1342
1343 struct superswitch super1 = {
1344 #ifndef MDASSEMBLE
1345 .examine_super = examine_super1,
1346 .brief_examine_super = brief_examine_super1,
1347 .detail_super = detail_super1,
1348 .brief_detail_super = brief_detail_super1,
1349 .export_super = export_super1,
1350 #endif
1351 .match_home = match_home1,
1352 .uuid_from_super = uuid_from_super1,
1353 .getinfo_super = getinfo_super1,
1354 .update_super = update_super1,
1355 .init_super = init_super1,
1356 .add_to_super = add_to_super1,
1357 .store_super = store_super1,
1358 .write_init_super = write_init_super1,
1359 .compare_super = compare_super1,
1360 .load_super = load_super1,
1361 .match_metadata_desc = match_metadata_desc1,
1362 .avail_size = avail_size1,
1363 .add_internal_bitmap = add_internal_bitmap1,
1364 .locate_bitmap = locate_bitmap1,
1365 .write_bitmap = write_bitmap1,
1366 .major = 1,
1367 #if __BYTE_ORDER == BIG_ENDIAN
1368 .swapuuid = 0,
1369 #else
1370 .swapuuid = 1,
1371 #endif
1372 };
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