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4b1ac34b
NB		 1/*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2004 Neil Brown <neilb@cse.unsw.edu.au>
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"
55935d51 31#include <asm/byteorder.h>
4b1ac34b
NB		 32
33/*
34 * All handling for the 0.90.0 version superblock is in
35 * this file.
36 * This includes:
37 * - finding, loading, and writing the superblock.
38 * - initialising a new superblock
39 * - printing the superblock for --examine
40 * - printing part of the superblock for --detail
41 * .. other stuff
42 */
43
44
45static unsigned long calc_sb0_csum(mdp_super_t *super)
46{
47 unsigned long csum = super->sb_csum;
48 unsigned long newcsum;
49 super->sb_csum= 0 ;
50 newcsum = calc_csum(super, MD_SB_BYTES);
51 super->sb_csum = csum;
52 return newcsum;
53}
54
f9ce90ba 55static void examine_super0(void *sbv)
4b1ac34b
NB		 56{
57 mdp_super_t *sb = sbv;
58 time_t atime;
59 int d;
60 char *c;
61
62 printf(" Magic : %08x\n", sb->md_magic);
63 printf(" Version : %02d.%02d.%02d\n", sb->major_version, sb->minor_version,
64 sb->patch_version);
65 if (sb->minor_version >= 90)
66 printf(" UUID : %08x:%08x:%08x:%08x\n", sb->set_uuid0, sb->set_uuid1,
67 sb->set_uuid2, sb->set_uuid3);
68 else
69 printf(" UUID : %08x\n", sb->set_uuid0);
70
71 atime = sb->ctime;
72 printf(" Creation Time : %.24s\n", ctime(&atime));
73 c=map_num(pers, sb->level);
74 printf(" Raid Level : %s\n", c?c:"-unknown-");
75 if ((int)sb->level >= 0)
76 printf(" Device Size : %d%s\n", sb->size, human_size((long long)sb->size<<10));
77 printf(" Raid Devices : %d\n", sb->raid_disks);
78 printf(" Total Devices : %d\n", sb->nr_disks);
79 printf("Preferred Minor : %d\n", sb->md_minor);
80 printf("\n");
81 atime = sb->utime;
82 printf(" Update Time : %.24s\n", ctime(&atime));
83 printf(" State : %s\n",
84 (sb->state&(1<<MD_SB_CLEAN))?"clean":"active");
55935d51
NB		 85 if (sb->state & (1<<MD_SB_BITMAP_PRESENT))
86 printf("Internal Bitmap : present\n");
4b1ac34b
NB		 87 printf(" Active Devices : %d\n", sb->active_disks);
88 printf("Working Devices : %d\n", sb->working_disks);
89 printf(" Failed Devices : %d\n", sb->failed_disks);
90 printf(" Spare Devices : %d\n", sb->spare_disks);
91 if (calc_sb0_csum(sb) == sb->sb_csum)
92 printf(" Checksum : %x - correct\n", sb->sb_csum);
93 else
94 printf(" Checksum : %x - expected %lx\n", sb->sb_csum, calc_sb0_csum(sb));
95 printf(" Events : %d.%d\n", sb->events_hi, sb->events_lo);
96 printf("\n");
97 if (sb->level == 5) {
98 c = map_num(r5layout, sb->layout);
99 printf(" Layout : %s\n", c?c:"-unknown-");
100 }
101 switch(sb->level) {
102 case 0:
103 case 4:
104 case 5:
105 printf(" Chunk Size : %dK\n", sb->chunk_size/1024);
106 break;
107 case -1:
108 printf(" Rounding : %dK\n", sb->chunk_size/1024);
109 break;
110 default: break;
111 }
112 printf("\n");
113 printf(" Number Major Minor RaidDevice State\n");
114 for (d= -1; d<(signed int)(sb->raid_disks+sb->spare_disks); d++) {
115 mdp_disk_t *dp;
116 char *dv;
117 char nb[5];
118 if (d>=0) dp = &sb->disks[d];
119 else dp = &sb->this_disk;
120 sprintf(nb, "%4d", d);
121 printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb,
122 dp->number, dp->major, dp->minor, dp->raid_disk);
123 if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty");
124 if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active");
125 if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync");
126 if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed");
127 if (dp->state == 0) printf(" spare");
128 if ((dv=map_dev(dp->major, dp->minor)))
129 printf(" %s", dv);
130 printf("\n");
131 if (d == -1) printf("\n");
132 }
133}
134
f9ce90ba 135static void brief_examine_super0(void *sbv)
4b1ac34b
NB		 136{
137 mdp_super_t *sb = sbv;
138 char *c=map_num(pers, sb->level);
139
140 printf("ARRAY %s level=%s num-devices=%d UUID=",
141 get_md_name(sb->md_minor),
142 c?c:"-unknown-", sb->raid_disks);
143 if (sb->minor_version >= 90)
144 printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
145 sb->set_uuid2, sb->set_uuid3);
146 else
147 printf("%08x", sb->set_uuid0);
148 printf("\n");
149}
150
f9ce90ba 151static void detail_super0(void *sbv)
4b1ac34b
NB		 152{
153 mdp_super_t *sb = sbv;
154 printf(" UUID : ");
155 if (sb->minor_version >= 90)
156 printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
157 sb->set_uuid2, sb->set_uuid3);
158 else
159 printf("%08x", sb->set_uuid0);
160 printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo);
161}
162
f9ce90ba 163static void brief_detail_super0(void *sbv)
4b1ac34b
NB		 164{
165 mdp_super_t *sb = sbv;
166 printf(" UUID=");
167 if (sb->minor_version >= 90)
168 printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
169 sb->set_uuid2, sb->set_uuid3);
170 else
171 printf("%08x", sb->set_uuid0);
172}
173
f9ce90ba 174static void uuid_from_super0(int uuid[4], void * sbv)
4b1ac34b
NB		 175{
176 mdp_super_t *super = sbv;
177 uuid[0] = super->set_uuid0;
178 if (super->minor_version >= 90) {
179 uuid[1] = super->set_uuid1;
180 uuid[2] = super->set_uuid2;
181 uuid[3] = super->set_uuid3;
182 } else {
183 uuid[1] = 0;
184 uuid[2] = 0;
185 uuid[3] = 0;
186 }
187}
188
f9ce90ba 189static void getinfo_super0(struct mdinfo *info, void *sbv)
4b1ac34b
NB		 190{
191 mdp_super_t *sb = sbv;
192 int working = 0;
193 int i;
194
195 info->array.major_version = sb->major_version;
196 info->array.minor_version = sb->minor_version;
197 info->array.patch_version = sb->patch_version;
198 info->array.raid_disks = sb->raid_disks;
199 info->array.level = sb->level;
200 info->array.md_minor = sb->md_minor;
201 info->array.ctime = sb->ctime;
202
203 info->disk.state = sb->this_disk.state;
204 info->disk.major = sb->this_disk.major;
205 info->disk.minor = sb->this_disk.minor;
206 info->disk.raid_disk = sb->this_disk.raid_disk;
207
208 info->events = md_event(sb);
209
210 uuid_from_super0(info->uuid, sbv);
211
212 /* work_disks is calculated rather than read directly */
213 for (i=0; i < MD_SB_DISKS; i++)
214 if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) &&
215 (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) &&
216 !(sb->disks[i].state & (1<<MD_DISK_FAULTY)))
217 working ++;
218 info->array.working_disks = working;
219}
220
221
f9ce90ba 222static int update_super0(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose)
4b1ac34b
NB		 223{
224 int rv = 0;
225 mdp_super_t *sb = sbv;
226 if (strcmp(update, "sparc2.2")==0 ) {
227 /* 2.2 sparc put the events in the wrong place
228 * So we copy the tail of the superblock
229 * up 4 bytes before continuing
230 */
231 __u32 *sb32 = (__u32*)sb;
232 memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
233 sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
234 (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
235 fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n",
236 devname);
237 }
238 if (strcmp(update, "super-minor") ==0) {
239 sb->md_minor = info->array.md_minor;
240 if (verbose)
241 fprintf(stderr, Name ": updating superblock of %s with minor number %d\n",
242 devname, info->array.md_minor);
243 }
244 if (strcmp(update, "summaries") == 0) {
245 int i;
246 /* set nr_disks, active_disks, working_disks,
247 * failed_disks, spare_disks based on disks[]
248 * array in superblock.
249 * Also make sure extra slots aren't 'failed'
250 */
251 sb->nr_disks = sb->active_disks =
252 sb->working_disks = sb->failed_disks =
253 sb->spare_disks = 0;
254 for (i=0; i < MD_SB_DISKS ; i++)
255 if (sb->disks[i].major ||
256 sb->disks[i].minor) {
257 int state = sb->disks[i].state;
258 if (state & (1<<MD_DISK_REMOVED))
259 continue;
260 sb->nr_disks++;
261 if (state & (1<<MD_DISK_ACTIVE))
262 sb->active_disks++;
263 if (state & (1<<MD_DISK_FAULTY))
264 sb->failed_disks++;
265 else
266 sb->working_disks++;
267 if (state == 0)
268 sb->spare_disks++;
269 } else if (i >= sb->raid_disks && sb->disks[i].number == 0)
270 sb->disks[i].state = 0;
271 }
272 if (strcmp(update, "force")==0) {
273 sb->events_hi = (info->events>>32) & 0xFFFFFFFF;
274 sb->events_lo = (info->events) & 0xFFFFFFFF;
275 if (sb->level == 5 || sb->level == 4 || sb->level == 6)
276 /* need to force clean */
277 sb->state |= (1 << MD_SB_CLEAN);
278 }
279 if (strcmp(update, "assemble")==0) {
280 int d = info->disk.number;
281 if (sb->disks[d].state != info->disk.state) {
282 sb->disks[d].state = info->disk.state;
283 rv = 1;
284 }
285 }
286 if (strcmp(update, "newdev") == 0) {
287 int d = info->disk.number;
288 memset(&sb->disks[d], 0, sizeof(sb->disks[d]));
289 sb->disks[d].number = d;
290 sb->disks[d].major = info->disk.major;
291 sb->disks[d].minor = info->disk.minor;
292 sb->disks[d].raid_disk = info->disk.raid_disk;
293 sb->disks[d].state = info->disk.state;
294 sb->this_disk = sb->disks[d];
295 }
296 if (strcmp(update, "grow") == 0) {
297 sb->raid_disks = info->array.raid_disks;
298 sb->nr_disks = info->array.nr_disks;
299 sb->active_disks = info->array.active_disks;
300 sb->working_disks = info->array.working_disks;
301 memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0]));
302 sb->disks[info->disk.number].number = info->disk.number;
303 sb->disks[info->disk.number].major = info->disk.major;
304 sb->disks[info->disk.number].minor = info->disk.minor;
305 sb->disks[info->disk.number].raid_disk = info->disk.raid_disk;
306 sb->disks[info->disk.number].state = info->disk.state;
307 if (sb->this_disk.number == info->disk.number)
308 sb->this_disk = sb->disks[info->disk.number];
309 }
310 if (strcmp(update, "resync") == 0) {
311 /* make sure resync happens */
312 sb->state &= ~(1<<MD_SB_CLEAN);
313 sb->recovery_cp = 0;
314 }
315
316 sb->sb_csum = calc_sb0_csum(sb);
317 return rv;
318}
319
f9ce90ba 320static __u64 event_super0(void *sbv)
4b1ac34b
NB		 321{
322 mdp_super_t *sb = sbv;
323 return md_event(sb);
324}
325
326
327
82d9eba6 328static int init_super0(void **sbp, mdu_array_info_t *info)
4b1ac34b 329{
55935d51 330 mdp_super_t *sb = malloc(MD_SB_BYTES + sizeof(bitmap_super_t));
82d9eba6 331 int spares;
dfe47e00 332 int rfd;
55935d51 333 memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t));
4b1ac34b 334
f9ce90ba
NB		 335 if (info->major_version == -1) {
336 /* zeroing the superblock */
82d9eba6
NB		 337 return 0;
338 }
339
340 spares = info->working_disks - info->active_disks;
341 if (info->raid_disks + spares > MD_SB_DISKS) {
342 fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
343 info->raid_disks , spares, MD_SB_DISKS);
344 return 0;
f9ce90ba
NB		 345 }
346
dfe47e00 347 rfd = open("/dev/urandom", O_RDONLY);
4b1ac34b
NB		 348 sb->md_magic = MD_SB_MAGIC;
349 sb->major_version = 0;
350 sb->minor_version = 90;
351 sb->patch_version = 0;
352 sb->gvalid_words = 0; /* ignored */
dfe47e00
NB		 353 if (rfd < 0 || read(rfd, &sb->set_uuid0, 4) != 4)
354 sb->set_uuid0 = random();
4b1ac34b
NB		 355 sb->ctime = time(0);
356 sb->level = info->level;
357 sb->size = info->size;
358 sb->nr_disks = info->nr_disks;
359 sb->raid_disks = info->raid_disks;
360 sb->md_minor = info->md_minor;
361 sb->not_persistent = 0;
dfe47e00
NB		 362 if (rfd < 0 || read(rfd, &sb->set_uuid1, 12) != 12) {
363 sb->set_uuid1 = random();
364 sb->set_uuid2 = random();
365 sb->set_uuid3 = random();
366 }
367 if (rfd >= 0)
368 close(rfd);
4b1ac34b
NB		 369
370 sb->utime = sb->ctime;
371 sb->state = info->state;
372 sb->active_disks = info->active_disks;
373 sb->working_disks = info->working_disks;
374 sb->failed_disks = info->failed_disks;
234a131a 375 sb->spare_disks = info->spare_disks;
4b1ac34b
NB		 376 sb->events_hi = 0;
377 sb->events_lo = 1;
378
379 sb->layout = info->layout;
380 sb->chunk_size = info->chunk_size;
381
382 *sbp = sb;
82d9eba6 383 return 1;
4b1ac34b
NB		 384}
385
386/* Add a device to the superblock being created */
f9ce90ba 387static void add_to_super0(void *sbv, mdu_disk_info_t *dinfo)
4b1ac34b
NB		 388{
389 mdp_super_t *sb = sbv;
390 mdp_disk_t *dk = &sb->disks[dinfo->number];
391
392 dk->number = dinfo->number;
393 dk->major = dinfo->major;
394 dk->minor = dinfo->minor;
395 dk->raid_disk = dinfo->raid_disk;
396 dk->state = dinfo->state;
397}
398
f9ce90ba 399static int store_super0(int fd, void *sbv)
4b1ac34b
NB		 400{
401 unsigned long size;
402 unsigned long long dsize;
403 unsigned long long offset;
f9ce90ba 404 mdp_super_t *super = sbv;
4b1ac34b
NB		 405
406#ifdef BLKGETSIZE64
407 if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
408#endif
409 {
410 if (ioctl(fd, BLKGETSIZE, &size))
411 return 1;
412 else
413 dsize = ((unsigned long long)size)<<9;
414 }
415
416 if (dsize < MD_RESERVED_SECTORS*2)
417 return 2;
418
419 offset = MD_NEW_SIZE_SECTORS(dsize>>9);
420
421 offset *= 512;
422
423 if (lseek64(fd, offset, 0)< 0LL)
424 return 3;
425
426 if (write(fd, super, sizeof(*super)) != sizeof(*super))
427 return 4;
428
570c0542 429 fsync(fd);
4b1ac34b
NB		 430 return 0;
431}
432
82d9eba6 433static int write_init_super0(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname)
4b1ac34b
NB		 434{
435 mdp_super_t *sb = sbv;
436 int fd = open(devname, O_RDWR, O_EXCL);
437 int rv;
438
439 if (fd < 0) {
440 fprintf(stderr, Name ": Failed to open %s to write superblock\n", devname);
441 return -1;
442 }
443
444 sb->this_disk = sb->disks[dinfo->number];
445 sb->sb_csum = calc_sb0_csum(sb);
446 rv = store_super0(fd, sb);
55935d51
NB		 447
448 if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) {
449 int towrite, n;
450 char buf[4096];
451 write(fd, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t));
452 towrite = 64*1024 - MD_SB_BYTES - sizeof(bitmap_super_t);
453 memset(buf, 0xff, sizeof(buf));
454 while (towrite > 0) {
455 n = towrite;
456 if (n > sizeof(buf))
457 n = sizeof(buf);
458 n = write(fd, buf, n);
459 if (n > 0)
460 towrite -= n;
461 else
462 break;
463 }
464 if (towrite)
465 rv = -2;
466 }
467
4b1ac34b
NB		 468 close(fd);
469 if (rv)
470 fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
471 return rv;
472}
473
f9ce90ba 474static int compare_super0(void **firstp, void *secondv)
4b1ac34b
NB		 475{
476 /*
477 * return:
478 * 0 same, or first was empty, and second was copied
479 * 1 second had wrong number
480 * 2 wrong uuid
481 * 3 wrong other info
482 */
483 mdp_super_t *first = *firstp;
484 mdp_super_t *second = secondv;
485
486 int uuid1[4], uuid2[4];
487 if (second->md_magic != MD_SB_MAGIC)
488 return 1;
489 if (!first) {
490 first = malloc(MD_SB_BYTES);
491 memcpy(first, second, MD_SB_BYTES);
492 *firstp = first;
493 return 0;
494 }
495
496 uuid_from_super0(uuid1, first);
497 uuid_from_super0(uuid2, second);
498 if (!same_uuid(uuid1, uuid2))
499 return 2;
500 if (first->major_version != second->major_version ||
501 first->minor_version != second->minor_version ||
502 first->patch_version != second->patch_version ||
503 first->gvalid_words != second->gvalid_words ||
504 first->ctime != second->ctime ||
505 first->level != second->level ||
506 first->size != second->size ||
507 first->raid_disks != second->raid_disks )
508 return 3;
509
510 return 0;
511}
512
513
82d9eba6 514static int load_super0(struct supertype *st, int fd, void **sbp, char *devname)
4b1ac34b
NB		 515{
516 /* try to read in the superblock
517 * Return:
518 * 0 on success
519 * 1 on cannot get superblock
520 * 2 on superblock meaningless
521 */
522 unsigned long size;
523 unsigned long long dsize;
524 unsigned long long offset;
525 mdp_super_t *super;
526
527#ifdef BLKGETSIZE64
528 if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
529#endif
530 {
531 if (ioctl(fd, BLKGETSIZE, &size)) {
532 if (devname)
533 fprintf(stderr, Name ": cannot find device size for %s: %s\n",
534 devname, strerror(errno));
535 return 1;
536 } else
537 dsize = size << 9;
538 }
539
540 if (dsize < MD_RESERVED_SECTORS*2) {
541 if (devname)
542 fprintf(stderr, Name ": %s is too small for md: size is %ld sectors.\n",
543 devname, size);
544 return 1;
545 }
546
547 offset = MD_NEW_SIZE_SECTORS(dsize>>9);
548
549 offset *= 512;
550
551 ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
552
553 if (lseek64(fd, offset, 0)< 0LL) {
554 if (devname)
555 fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
556 devname, strerror(errno));
557 return 1;
558 }
559
560 super = malloc(MD_SB_BYTES);
561
562 if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) {
563 if (devname)
564 fprintf(stderr, Name ": Cannot read superblock on %s\n",
565 devname);
566 free(super);
567 return 1;
568 }
569
570 if (super->md_magic != MD_SB_MAGIC) {
571 if (devname)
572 fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
573 devname, MD_SB_MAGIC, super->md_magic);
574 free(super);
575 return 2;
576 }
577
578 if (super->major_version != 0) {
579 if (devname)
580 fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
581 devname, super->major_version);
582 free(super);
583 return 2;
584 }
585 *sbp = super;
82d9eba6
NB		 586 if (st->ss == NULL) {
587 st->ss = &super0;
588 st->minor_version = 90;
589 }
590
4b1ac34b
NB		 591 return 0;
592}
f9ce90ba 593
82d9eba6 594static struct supertype *match_metadata_desc0(char *arg)
f9ce90ba 595{
82d9eba6
NB		 596 struct supertype *st = malloc(sizeof(*st));
597 if (!st) return st;
598
599 st->ss = &super0;
600 st->minor_version = 90;
f9ce90ba
NB		 601 if (strcmp(arg, "0") == 0 ||
602 strcmp(arg, "0.90") == 0 ||
603 strcmp(arg, "default") == 0
604 )
82d9eba6
NB		 605 return st;
606
607 free(st);
608 return NULL;
609}
610
611static __u64 avail_size0(__u64 devsize)
612{
613 if (devsize < MD_RESERVED_SECTORS*2)
614 return 0ULL;
615 return MD_NEW_SIZE_SECTORS(devsize);
f9ce90ba
NB		 616}
617
55935d51
NB		 618static int add_internal_bitmap0(void *sbv, int chunk, int delay, unsigned long long size)
619{
620 /*
621 * The bitmap comes immediately after the superblock and must be 60K in size
622 * at most. The default size is between 30K and 60K
623 *
624 * size is in K, chunk is in bytes !!!
625 */
626
627 unsigned long long bits = size;
628 unsigned long long max_bits = 60*1024*8;
629 unsigned long long min_chunk;
630 mdp_super_t *sb = sbv;
631 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES);
632
633
634 min_chunk = 1024;
635 while (bits > max_bits) {
636 min_chunk *= 2;
637 bits = (bits+1)/2;
638 }
639 if (chunk == UnSet)
640 chunk = min_chunk;
641 else if (chunk < min_chunk)
642 return 0; /* chunk size too small */
643
644 sb->state |= (1<<MD_SB_BITMAP_PRESENT);
645
646 bms->magic = __le32_to_cpu(BITMAP_MAGIC);
647 bms->version = __le32_to_cpu(BITMAP_MAJOR);
648 uuid_from_super0((int*)bms->uuid, sb);
649 bms->chunksize = __le32_to_cpu(chunk);
650 bms->daemon_sleep = __le32_to_cpu(delay);
651 bms->sync_size = __le64_to_cpu(size);
652
653
654 return 1;
655}
656
657
658void locate_bitmap0(struct supertype *st, int fd)
659{
660 unsigned long long dsize;
661 unsigned long size;
662 unsigned long long offset;
663#ifdef BLKGETSIZE64
664 if (ioctl(fd, BLKGETSIZE64, &dsize) != 0)
665#endif
666 {
667 if (ioctl(fd, BLKGETSIZE, &size))
668 return;
669 else
670 dsize = ((unsigned long long)size)<<9;
671 }
672
673 if (dsize < MD_RESERVED_SECTORS*2)
674 return;
675
676 offset = MD_NEW_SIZE_SECTORS(dsize>>9);
677
678 offset *= 512;
679
680 offset += MD_SB_BYTES;
681
682 lseek64(fd, offset, 0);
683}
684
685
686
f9ce90ba
NB		 687struct superswitch super0 = {
688 .examine_super = examine_super0,
689 .brief_examine_super = brief_examine_super0,
690 .detail_super = detail_super0,
691 .brief_detail_super = brief_detail_super0,
692 .uuid_from_super = uuid_from_super0,
693 .getinfo_super = getinfo_super0,
694 .update_super = update_super0,
695 .event_super = event_super0,
696 .init_super = init_super0,
697 .add_to_super = add_to_super0,
698 .store_super = store_super0,
699 .write_init_super = write_init_super0,
700 .compare_super = compare_super0,
701 .load_super = load_super0,
702 .match_metadata_desc = match_metadata_desc0,
82d9eba6 703 .avail_size = avail_size0,
55935d51
NB		 704 .add_internal_bitmap = add_internal_bitmap0,
705 .locate_bitmap = locate_bitmap0,
82d9eba6 706 .major = 0,
f9ce90ba 707};
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