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[thirdparty/mdadm.git] / super1.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2009 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@suse.de>
23 */
24
25 #include "mdadm.h"
26 /*
27 * The version-1 superblock :
28 * All numeric fields are little-endian.
29 *
30 * total size: 256 bytes plus 2 per device.
31 * 1K allows 384 devices.
32 */
33 struct mdp_superblock_1 {
34 /* constant array information - 128 bytes */
35 __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
36 __u32 major_version; /* 1 */
37 __u32 feature_map; /* 0 for now */
38 __u32 pad0; /* always set to 0 when writing */
39
40 __u8 set_uuid[16]; /* user-space generated. */
41 char set_name[32]; /* set and interpreted by user-space */
42
43 __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
44 __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */
45 __u32 layout; /* only for raid5 currently */
46 __u64 size; /* used size of component devices, in 512byte sectors */
47
48 __u32 chunksize; /* in 512byte sectors */
49 __u32 raid_disks;
50 __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts
51 * NOTE: signed, so bitmap can be before superblock
52 * only meaningful of feature_map[0] is set.
53 */
54
55 /* These are only valid with feature bit '4' */
56 __u32 new_level; /* new level we are reshaping to */
57 __u64 reshape_position; /* next address in array-space for reshape */
58 __u32 delta_disks; /* change in number of raid_disks */
59 __u32 new_layout; /* new layout */
60 __u32 new_chunk; /* new chunk size (bytes) */
61 __u8 pad1[128-124]; /* set to 0 when written */
62
63 /* constant this-device information - 64 bytes */
64 __u64 data_offset; /* sector start of data, often 0 */
65 __u64 data_size; /* sectors in this device that can be used for data */
66 __u64 super_offset; /* sector start of this superblock */
67 __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */
68 __u32 dev_number; /* permanent identifier of this device - not role in raid */
69 __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
70 __u8 device_uuid[16]; /* user-space setable, ignored by kernel */
71 __u8 devflags; /* per-device flags. Only one defined...*/
72 #define WriteMostly1 1 /* mask for writemostly flag in above */
73 __u8 pad2[64-57]; /* set to 0 when writing */
74
75 /* array state information - 64 bytes */
76 __u64 utime; /* 40 bits second, 24 btes microseconds */
77 __u64 events; /* incremented when superblock updated */
78 __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */
79 __u32 sb_csum; /* checksum upto dev_roles[max_dev] */
80 __u32 max_dev; /* size of dev_roles[] array to consider */
81 __u8 pad3[64-32]; /* set to 0 when writing */
82
83 /* device state information. Indexed by dev_number.
84 * 2 bytes per device
85 * Note there are no per-device state flags. State information is rolled
86 * into the 'roles' value. If a device is spare or faulty, then it doesn't
87 * have a meaningful role.
88 */
89 __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
90 };
91
92 struct misc_dev_info {
93 __u64 device_size;
94 };
95
96 /* feature_map bits */
97 #define MD_FEATURE_BITMAP_OFFSET 1
98 #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
99 * must be honoured
100 */
101 #define MD_FEATURE_RESHAPE_ACTIVE 4
102
103 #define MD_FEATURE_ALL (1|2|4)
104
105 #ifndef offsetof
106 #define offsetof(t,f) ((size_t)&(((t*)0)->f))
107 #endif
108 static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
109 {
110 unsigned int disk_csum, csum;
111 unsigned long long newcsum;
112 int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2;
113 unsigned int *isuper = (unsigned int*)sb;
114 int i;
115
116 /* make sure I can count... */
117 if (offsetof(struct mdp_superblock_1,data_offset) != 128 ||
118 offsetof(struct mdp_superblock_1, utime) != 192 ||
119 sizeof(struct mdp_superblock_1) != 256) {
120 fprintf(stderr, "WARNING - superblock isn't sized correctly\n");
121 }
122
123 disk_csum = sb->sb_csum;
124 sb->sb_csum = 0;
125 newcsum = 0;
126 for (i=0; size>=4; size -= 4 ) {
127 newcsum += __le32_to_cpu(*isuper);
128 isuper++;
129 }
130
131 if (size == 2)
132 newcsum += __le16_to_cpu(*(unsigned short*) isuper);
133
134 csum = (newcsum & 0xffffffff) + (newcsum >> 32);
135 sb->sb_csum = disk_csum;
136 return __cpu_to_le32(csum);
137 }
138
139 static char abuf[4096+4096];
140 static int aread(int fd, void *buf, int len)
141 {
142 /* aligned read.
143 * On devices with a 4K sector size, we need to read
144 * the full sector and copy relevant bits into
145 * the buffer
146 */
147 int bsize;
148 char *b;
149 int n;
150 if (ioctl(fd, BLKSSZGET, &bsize) != 0 ||
151 bsize <= len)
152 return read(fd, buf, len);
153 if (bsize > 4096)
154 return -1;
155 b = (char*)(((long)(abuf+4096))&~4095UL);
156
157 n = read(fd, b, bsize);
158 if (n <= 0)
159 return n;
160 lseek(fd, len - n, 1);
161 if (n > len)
162 n = len;
163 memcpy(buf, b, n);
164 return n;
165 }
166
167 static int awrite(int fd, void *buf, int len)
168 {
169 /* aligned write.
170 * On devices with a 4K sector size, we need to write
171 * the full sector. We pre-read if the sector is larger
172 * than the write.
173 * The address must be sector-aligned.
174 */
175 int bsize;
176 char *b;
177 int n;
178 if (ioctl(fd, BLKSSZGET, &bsize) != 0 ||
179 bsize <= len)
180 return write(fd, buf, len);
181 if (bsize > 4096)
182 return -1;
183 b = (char*)(((long)(abuf+4096))&~4095UL);
184
185 n = read(fd, b, bsize);
186 if (n <= 0)
187 return n;
188 lseek(fd, -n, 1);
189 memcpy(b, buf, len);
190 n = write(fd, b, bsize);
191 if (n <= 0)
192 return n;
193 lseek(fd, len - n, 1);
194 return len;
195 }
196
197 #ifndef MDASSEMBLE
198 static void examine_super1(struct supertype *st, char *homehost)
199 {
200 struct mdp_superblock_1 *sb = st->sb;
201 time_t atime;
202 int d;
203 int role;
204 int delta_extra = 0;
205 int i;
206 char *c;
207 int l = homehost ? strlen(homehost) : 0;
208 int layout;
209 unsigned long long sb_offset;
210
211 printf(" Magic : %08x\n", __le32_to_cpu(sb->magic));
212 printf(" Version : 1");
213 sb_offset = __le64_to_cpu(sb->super_offset);
214 if (sb_offset <= 4)
215 printf(".1\n");
216 else if (sb_offset <= 8)
217 printf(".2\n");
218 else
219 printf(".0\n");
220 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map));
221 printf(" Array UUID : ");
222 for (i=0; i<16; i++) {
223 if ((i&3)==0 && i != 0) printf(":");
224 printf("%02x", sb->set_uuid[i]);
225 }
226 printf("\n");
227 printf(" Name : %.32s", sb->set_name);
228 if (l > 0 && l < 32 &&
229 sb->set_name[l] == ':' &&
230 strncmp(sb->set_name, homehost, l) == 0)
231 printf(" (local to host %s)", homehost);
232 printf("\n");
233 atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL;
234 printf(" Creation Time : %.24s\n", ctime(&atime));
235 c=map_num(pers, __le32_to_cpu(sb->level));
236 printf(" Raid Level : %s\n", c?c:"-unknown-");
237 printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks));
238 printf("\n");
239 printf(" Avail Dev Size : %llu%s\n",
240 (unsigned long long)__le64_to_cpu(sb->data_size),
241 human_size(__le64_to_cpu(sb->data_size)<<9));
242 if (__le32_to_cpu(sb->level) >= 0) {
243 int ddsks=0;
244 switch(__le32_to_cpu(sb->level)) {
245 case 1: ddsks=1;break;
246 case 4:
247 case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break;
248 case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break;
249 case 10:
250 layout = __le32_to_cpu(sb->layout);
251 ddsks = __le32_to_cpu(sb->raid_disks)
252 / (layout&255) / ((layout>>8)&255);
253 }
254 if (ddsks)
255 printf(" Array Size : %llu%s\n",
256 ddsks*(unsigned long long)__le64_to_cpu(sb->size),
257 human_size(ddsks*__le64_to_cpu(sb->size)<<9));
258 if (sb->size != sb->data_size)
259 printf(" Used Dev Size : %llu%s\n",
260 (unsigned long long)__le64_to_cpu(sb->size),
261 human_size(__le64_to_cpu(sb->size)<<9));
262 }
263 if (sb->data_offset)
264 printf(" Data Offset : %llu sectors\n",
265 (unsigned long long)__le64_to_cpu(sb->data_offset));
266 printf(" Super Offset : %llu sectors\n",
267 (unsigned long long)__le64_to_cpu(sb->super_offset));
268 if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)
269 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset));
270 printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
271 printf(" Device UUID : ");
272 for (i=0; i<16; i++) {
273 if ((i&3)==0 && i != 0) printf(":");
274 printf("%02x", sb->device_uuid[i]);
275 }
276 printf("\n");
277 printf("\n");
278 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
279 printf("Internal Bitmap : %ld sectors from superblock\n",
280 (long)(int32_t)__le32_to_cpu(sb->bitmap_offset));
281 }
282 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
283 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2,
284 human_size(__le64_to_cpu(sb->reshape_position)<<9));
285 if (__le32_to_cpu(sb->delta_disks)) {
286 printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks));
287 printf(" (%d->%d)\n",
288 __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks),
289 __le32_to_cpu(sb->raid_disks));
290 if ((int)__le32_to_cpu(sb->delta_disks) < 0)
291 delta_extra = -__le32_to_cpu(sb->delta_disks);
292 }
293 if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) {
294 c = map_num(pers, __le32_to_cpu(sb->new_level));
295 printf(" New Level : %s\n", c?c:"-unknown-");
296 }
297 if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) {
298 if (__le32_to_cpu(sb->level) == 5) {
299 c = map_num(r5layout, __le32_to_cpu(sb->new_layout));
300 printf(" New Layout : %s\n", c?c:"-unknown-");
301 }
302 if (__le32_to_cpu(sb->level) == 6) {
303 c = map_num(r6layout, __le32_to_cpu(sb->new_layout));
304 printf(" New Layout : %s\n", c?c:"-unknown-");
305 }
306 if (__le32_to_cpu(sb->level) == 10) {
307 printf(" New Layout :");
308 print_r10_layout(__le32_to_cpu(sb->new_layout));
309 printf("\n");
310 }
311 }
312 if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize))
313 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2);
314 printf("\n");
315 }
316 if (sb->devflags) {
317 printf(" Flags :");
318 if (sb->devflags & WriteMostly1)
319 printf(" write-mostly");
320 printf("\n");
321 }
322
323 atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL;
324 printf(" Update Time : %.24s\n", ctime(&atime));
325
326 if (calc_sb_1_csum(sb) == sb->sb_csum)
327 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum));
328 else
329 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum),
330 __le32_to_cpu(calc_sb_1_csum(sb)));
331 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events));
332 printf("\n");
333 if (__le32_to_cpu(sb->level) == 5) {
334 c = map_num(r5layout, __le32_to_cpu(sb->layout));
335 printf(" Layout : %s\n", c?c:"-unknown-");
336 }
337 if (__le32_to_cpu(sb->level) == 6) {
338 c = map_num(r6layout, __le32_to_cpu(sb->layout));
339 printf(" Layout : %s\n", c?c:"-unknown-");
340 }
341 if (__le32_to_cpu(sb->level) == 10) {
342 int lo = __le32_to_cpu(sb->layout);
343 printf(" Layout :");
344 print_r10_layout(lo);
345 printf("\n");
346 }
347 switch(__le32_to_cpu(sb->level)) {
348 case 0:
349 case 4:
350 case 5:
351 case 6:
352 case 10:
353 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2);
354 break;
355 case -1:
356 printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2);
357 break;
358 default: break;
359 }
360 printf("\n");
361 #if 0
362 /* This turns out to just be confusing */
363 printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number));
364 for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--)
365 if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff)
366 break;
367 for (d=0; d < i; d++) {
368 int role = __le16_to_cpu(sb->dev_roles[d]);
369 if (d) printf(", ");
370 if (role == 0xffff) printf("empty");
371 else if(role == 0xfffe) printf("failed");
372 else printf("%d", role);
373 }
374 printf(")\n");
375 #endif
376 printf(" Device Role : ");
377 d = __le32_to_cpu(sb->dev_number);
378 if (d < __le32_to_cpu(sb->max_dev))
379 role = __le16_to_cpu(sb->dev_roles[d]);
380 else
381 role = 0xFFFF;
382 if (role >= 0xFFFE)
383 printf("spare\n");
384 else
385 printf("Active device %d\n", role);
386
387 printf(" Array State : ");
388 for (d=0; d<__le32_to_cpu(sb->raid_disks) + delta_extra; d++) {
389 int cnt = 0;
390 int me = 0;
391 int i;
392 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
393 int role = __le16_to_cpu(sb->dev_roles[i]);
394 if (role == d) {
395 if (i == __le32_to_cpu(sb->dev_number))
396 me = 1;
397 cnt++;
398 }
399 }
400 if (cnt > 1) printf("?");
401 else if (cnt == 1) printf("A");
402 else printf (".");
403 }
404 #if 0
405 /* This is confusing too */
406 faulty = 0;
407 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
408 int role = __le16_to_cpu(sb->dev_roles[i]);
409 if (role == 0xFFFE)
410 faulty++;
411 }
412 if (faulty) printf(" %d failed", faulty);
413 #endif
414 printf(" ('A' == active, '.' == missing)");
415 printf("\n");
416 }
417
418
419 static void brief_examine_super1(struct supertype *st, int verbose)
420 {
421 struct mdp_superblock_1 *sb = st->sb;
422 int i;
423 unsigned long long sb_offset;
424 char *nm;
425 char *c=map_num(pers, __le32_to_cpu(sb->level));
426
427 nm = strchr(sb->set_name, ':');
428 if (nm)
429 nm++;
430 else if (sb->set_name[0])
431 nm = sb->set_name;
432 else
433 nm = NULL;
434
435 printf("ARRAY%s%s", nm ? " /dev/md/":"", nm);
436 if (verbose && c)
437 printf(" level=%s", c);
438 sb_offset = __le64_to_cpu(sb->super_offset);
439 if (sb_offset <= 4)
440 printf(" metadata=1.1 ");
441 else if (sb_offset <= 8)
442 printf(" metadata=1.2 ");
443 else
444 printf(" metadata=1.0 ");
445 if (verbose)
446 printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks));
447 printf("UUID=");
448 for (i=0; i<16; i++) {
449 if ((i&3)==0 && i != 0) printf(":");
450 printf("%02x", sb->set_uuid[i]);
451 }
452 if (sb->set_name[0])
453 printf(" name=%.32s", sb->set_name);
454 printf("\n");
455 }
456
457 static void export_examine_super1(struct supertype *st)
458 {
459 struct mdp_superblock_1 *sb = st->sb;
460 int i;
461 int len = 32;
462
463 printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level)));
464 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks));
465 for (i=0; i<32; i++)
466 if (sb->set_name[i] == '\n' ||
467 sb->set_name[i] == '\0') {
468 len = i;
469 break;
470 }
471 if (len)
472 printf("MD_NAME=%.*s\n", len, sb->set_name);
473 printf("MD_UUID=");
474 for (i=0; i<16; i++) {
475 if ((i&3)==0 && i != 0) printf(":");
476 printf("%02x", sb->set_uuid[i]);
477 }
478 printf("\n");
479 printf("MD_UPDATE_TIME=%llu\n",
480 __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL);
481 printf("MD_DEV_UUID=");
482 for (i=0; i<16; i++) {
483 if ((i&3)==0 && i != 0) printf(":");
484 printf("%02x", sb->device_uuid[i]);
485 }
486 printf("\n");
487 printf("MD_EVENTS=%llu\n",
488 (unsigned long long)__le64_to_cpu(sb->events));
489 }
490
491 static void detail_super1(struct supertype *st, char *homehost)
492 {
493 struct mdp_superblock_1 *sb = st->sb;
494 int i;
495 int l = homehost ? strlen(homehost) : 0;
496
497 printf(" Name : %.32s", sb->set_name);
498 if (l > 0 && l < 32 &&
499 sb->set_name[l] == ':' &&
500 strncmp(sb->set_name, homehost, l) == 0)
501 printf(" (local to host %s)", homehost);
502 printf("\n UUID : ");
503 for (i=0; i<16; i++) {
504 if ((i&3)==0 && i != 0) printf(":");
505 printf("%02x", sb->set_uuid[i]);
506 }
507 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events));
508 }
509
510 static void brief_detail_super1(struct supertype *st)
511 {
512 struct mdp_superblock_1 *sb = st->sb;
513 int i;
514
515 if (sb->set_name[0])
516 printf(" name=%.32s", sb->set_name);
517 printf(" UUID=");
518 for (i=0; i<16; i++) {
519 if ((i&3)==0 && i != 0) printf(":");
520 printf("%02x", sb->set_uuid[i]);
521 }
522 }
523
524 static void export_detail_super1(struct supertype *st)
525 {
526 struct mdp_superblock_1 *sb = st->sb;
527 int i;
528 int len = 32;
529
530 for (i=0; i<32; i++)
531 if (sb->set_name[i] == '\n' ||
532 sb->set_name[i] == '\0') {
533 len = i;
534 break;
535 }
536 if (len)
537 printf("MD_NAME=%.*s\n", len, sb->set_name);
538 }
539
540 #endif
541
542 static int match_home1(struct supertype *st, char *homehost)
543 {
544 struct mdp_superblock_1 *sb = st->sb;
545 int l = homehost ? strlen(homehost) : 0;
546
547 return (l > 0 && l < 32 &&
548 sb->set_name[l] == ':' &&
549 strncmp(sb->set_name, homehost, l) == 0);
550 }
551
552 static void uuid_from_super1(struct supertype *st, int uuid[4])
553 {
554 struct mdp_superblock_1 *super = st->sb;
555 char *cuuid = (char*)uuid;
556 int i;
557 for (i=0; i<16; i++)
558 cuuid[i] = super->set_uuid[i];
559 }
560
561 static void getinfo_super1(struct supertype *st, struct mdinfo *info)
562 {
563 struct mdp_superblock_1 *sb = st->sb;
564 int working = 0;
565 int i;
566 int role;
567
568 info->array.major_version = 1;
569 info->array.minor_version = st->minor_version;
570 info->array.patch_version = 0;
571 info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
572 info->array.level = __le32_to_cpu(sb->level);
573 info->array.layout = __le32_to_cpu(sb->layout);
574 info->array.md_minor = -1;
575 info->array.ctime = __le64_to_cpu(sb->ctime);
576 info->array.utime = __le64_to_cpu(sb->utime);
577 info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
578 info->array.state =
579 (__le64_to_cpu(sb->resync_offset) >= __le64_to_cpu(sb->size))
580 ? 1 : 0;
581
582 info->data_offset = __le64_to_cpu(sb->data_offset);
583 info->component_size = __le64_to_cpu(sb->size);
584
585 info->disk.major = 0;
586 info->disk.minor = 0;
587 info->disk.number = __le32_to_cpu(sb->dev_number);
588 if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
589 __le32_to_cpu(sb->max_dev) > 512)
590 role = 0xfffe;
591 else
592 role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
593
594 info->disk.raid_disk = -1;
595 switch(role) {
596 case 0xFFFF:
597 info->disk.state = 0; /* spare: not active, not sync, not faulty */
598 break;
599 case 0xFFFE:
600 info->disk.state = 1; /* faulty */
601 break;
602 default:
603 info->disk.state = 6; /* active and in sync */
604 info->disk.raid_disk = role;
605 }
606 info->events = __le64_to_cpu(sb->events);
607 sprintf(info->text_version, "1.%d", st->minor_version);
608 info->safe_mode_delay = 200;
609
610 memcpy(info->uuid, sb->set_uuid, 16);
611
612 strncpy(info->name, sb->set_name, 32);
613 info->name[32] = 0;
614
615 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
616 info->reshape_active = 1;
617 info->reshape_progress = __le64_to_cpu(sb->reshape_position);
618 info->new_level = __le32_to_cpu(sb->new_level);
619 info->delta_disks = __le32_to_cpu(sb->delta_disks);
620 info->new_layout = __le32_to_cpu(sb->new_layout);
621 info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
622 if (info->delta_disks < 0)
623 info->array.raid_disks -= info->delta_disks;
624 } else
625 info->reshape_active = 0;
626
627 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
628 role = __le16_to_cpu(sb->dev_roles[i]);
629 if (/*role == 0xFFFF || */role < info->array.raid_disks)
630 working++;
631 }
632
633 info->array.working_disks = working;
634 }
635
636 static int update_super1(struct supertype *st, struct mdinfo *info,
637 char *update,
638 char *devname, int verbose,
639 int uuid_set, char *homehost)
640 {
641 /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
642 * For others, the return value is ignored.
643 */
644 int rv = 0;
645 struct mdp_superblock_1 *sb = st->sb;
646
647 if (strcmp(update, "force-one")==0) {
648 /* Not enough devices for a working array,
649 * so bring this one up-to-date
650 */
651 if (sb->events != __cpu_to_le64(info->events))
652 rv = 1;
653 sb->events = __cpu_to_le64(info->events);
654 }
655 if (strcmp(update, "force-array")==0) {
656 /* Degraded array and 'force' requests to
657 * maybe need to mark it 'clean'.
658 */
659 switch(__le32_to_cpu(sb->level)) {
660 case 5: case 4: case 6:
661 /* need to force clean */
662 if (sb->resync_offset != MaxSector)
663 rv = 1;
664 sb->resync_offset = MaxSector;
665 }
666 }
667 if (strcmp(update, "assemble")==0) {
668 int d = info->disk.number;
669 int want;
670 if (info->disk.state == 6)
671 want = __cpu_to_le32(info->disk.raid_disk);
672 else
673 want = 0xFFFF;
674 if (sb->dev_roles[d] != want) {
675 sb->dev_roles[d] = want;
676 rv = 1;
677 }
678 }
679 if (strcmp(update, "linear-grow-new") == 0) {
680 int i;
681 int rfd, fd;
682 int max = __le32_to_cpu(sb->max_dev);
683
684 for (i=0 ; i < max ; i++)
685 if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe)
686 break;
687 sb->dev_number = __cpu_to_le32(i);
688 info->disk.number = i;
689 if (max >= __le32_to_cpu(sb->max_dev))
690 sb->max_dev = __cpu_to_le32(max+1);
691
692 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
693 read(rfd, sb->device_uuid, 16) != 16) {
694 __u32 r[4] = {random(), random(), random(), random()};
695 memcpy(sb->device_uuid, r, 16);
696 }
697 if (rfd >= 0)
698 close(rfd);
699
700 sb->dev_roles[i] =
701 __cpu_to_le16(info->disk.raid_disk);
702
703 fd = open(devname, O_RDONLY);
704 if (fd >= 0) {
705 unsigned long long ds;
706 get_dev_size(fd, devname, &ds);
707 close(fd);
708 ds >>= 9;
709 if (__le64_to_cpu(sb->super_offset) <
710 __le64_to_cpu(sb->data_offset)) {
711 sb->data_size = __cpu_to_le64(
712 ds - __le64_to_cpu(sb->data_offset));
713 } else {
714 ds -= 8*2;
715 ds &= ~(unsigned long long)(4*2-1);
716 sb->super_offset = __cpu_to_le64(ds);
717 sb->data_size = __cpu_to_le64(
718 ds - __le64_to_cpu(sb->data_offset));
719 }
720 }
721 }
722 if (strcmp(update, "linear-grow-update") == 0) {
723 sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
724 sb->dev_roles[info->disk.number] =
725 __cpu_to_le16(info->disk.raid_disk);
726 }
727 if (strcmp(update, "resync") == 0) {
728 /* make sure resync happens */
729 sb->resync_offset = 0ULL;
730 }
731 if (strcmp(update, "uuid") == 0) {
732 copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
733
734 if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
735 struct bitmap_super_s *bm;
736 bm = (struct bitmap_super_s*)(st->sb+1024);
737 memcpy(bm->uuid, sb->set_uuid, 16);
738 }
739 }
740 if (strcmp(update, "homehost") == 0 &&
741 homehost) {
742 char *c;
743 update = "name";
744 c = strchr(sb->set_name, ':');
745 if (c)
746 strncpy(info->name, c+1, 31 - (c-sb->set_name));
747 else
748 strncpy(info->name, sb->set_name, 32);
749 info->name[32] = 0;
750 }
751 if (strcmp(update, "name") == 0) {
752 if (info->name[0] == 0)
753 sprintf(info->name, "%d", info->array.md_minor);
754 memset(sb->set_name, 0, sizeof(sb->set_name));
755 if (homehost &&
756 strchr(info->name, ':') == NULL &&
757 strlen(homehost)+1+strlen(info->name) < 32) {
758 strcpy(sb->set_name, homehost);
759 strcat(sb->set_name, ":");
760 strcat(sb->set_name, info->name);
761 } else
762 strcpy(sb->set_name, info->name);
763 }
764 if (strcmp(update, "devicesize") == 0 &&
765 __le64_to_cpu(sb->super_offset) <
766 __le64_to_cpu(sb->data_offset)) {
767 /* set data_size to device size less data_offset */
768 struct misc_dev_info *misc = (struct misc_dev_info*)
769 (st->sb + 1024 + 512);
770 printf("Size was %llu\n", (unsigned long long)
771 __le64_to_cpu(sb->data_size));
772 sb->data_size = __cpu_to_le64(
773 misc->device_size - __le64_to_cpu(sb->data_offset));
774 printf("Size is %llu\n", (unsigned long long)
775 __le64_to_cpu(sb->data_size));
776 }
777 if (strcmp(update, "_reshape_progress")==0)
778 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
779
780 sb->sb_csum = calc_sb_1_csum(sb);
781 return rv;
782 }
783
784 static int init_super1(struct supertype *st, mdu_array_info_t *info,
785 unsigned long long size, char *name, char *homehost, int *uuid)
786 {
787 struct mdp_superblock_1 *sb;
788 int spares;
789 int rfd;
790 char defname[10];
791
792 if (posix_memalign((void**)&sb, 512, (1024 + 512 +
793 sizeof(struct misc_dev_info))) != 0) {
794 fprintf(stderr, Name
795 ": %s could not allocate superblock\n", __func__);
796 return 0;
797 }
798 memset(sb, 0, 1024);
799
800 st->sb = sb;
801 if (info == NULL) {
802 /* zeroing superblock */
803 return 0;
804 }
805
806 spares = info->working_disks - info->active_disks;
807 if (info->raid_disks + spares > 384) {
808 fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
809 info->raid_disks , spares, 384);
810 return 0;
811 }
812
813 sb->magic = __cpu_to_le32(MD_SB_MAGIC);
814 sb->major_version = __cpu_to_le32(1);
815 sb->feature_map = 0;
816 sb->pad0 = 0;
817
818 if (uuid)
819 copy_uuid(sb->set_uuid, uuid, super1.swapuuid);
820 else {
821 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
822 read(rfd, sb->set_uuid, 16) != 16) {
823 __u32 r[4] = {random(), random(), random(), random()};
824 memcpy(sb->set_uuid, r, 16);
825 }
826 if (rfd >= 0) close(rfd);
827 }
828
829 if (name == NULL || *name == 0) {
830 sprintf(defname, "%d", info->md_minor);
831 name = defname;
832 }
833 memset(sb->set_name, 0, 32);
834 if (homehost &&
835 strchr(name, ':')== NULL &&
836 strlen(homehost)+1+strlen(name) < 32) {
837 strcpy(sb->set_name, homehost);
838 strcat(sb->set_name, ":");
839 strcat(sb->set_name, name);
840 } else
841 strcpy(sb->set_name, name);
842
843 sb->ctime = __cpu_to_le64((unsigned long long)time(0));
844 sb->level = __cpu_to_le32(info->level);
845 sb->layout = __cpu_to_le32(info->layout);
846 sb->size = __cpu_to_le64(size*2ULL);
847 sb->chunksize = __cpu_to_le32(info->chunk_size>>9);
848 sb->raid_disks = __cpu_to_le32(info->raid_disks);
849
850 sb->data_offset = __cpu_to_le64(0);
851 sb->data_size = __cpu_to_le64(0);
852 sb->super_offset = __cpu_to_le64(0);
853 sb->recovery_offset = __cpu_to_le64(0);
854
855 sb->utime = sb->ctime;
856 sb->events = __cpu_to_le64(1);
857 if (info->state & (1<<MD_SB_CLEAN))
858 sb->resync_offset = MaxSector;
859 else
860 sb->resync_offset = 0;
861 sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/
862 sizeof(sb->dev_roles[0]));
863 memset(sb->pad3, 0, sizeof(sb->pad3));
864
865 memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1));
866
867 return 1;
868 }
869
870 struct devinfo {
871 int fd;
872 char *devname;
873 mdu_disk_info_t disk;
874 struct devinfo *next;
875 };
876 #ifndef MDASSEMBLE
877 /* Add a device to the superblock being created */
878 static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk,
879 int fd, char *devname)
880 {
881 struct mdp_superblock_1 *sb = st->sb;
882 __u16 *rp = sb->dev_roles + dk->number;
883 struct devinfo *di, **dip;
884
885 if ((dk->state & 6) == 6) /* active, sync */
886 *rp = __cpu_to_le16(dk->raid_disk);
887 else if ((dk->state & ~2) == 0) /* active or idle -> spare */
888 *rp = 0xffff;
889 else
890 *rp = 0xfffe;
891
892 if (dk->number >= __le32_to_cpu(sb->max_dev) &&
893 __le32_to_cpu(sb->max_dev) < 384)
894 sb->max_dev = __cpu_to_le32(dk->number+1);
895
896 sb->dev_number = __cpu_to_le32(dk->number);
897 sb->sb_csum = calc_sb_1_csum(sb);
898
899 dip = (struct devinfo **)&st->info;
900 while (*dip)
901 dip = &(*dip)->next;
902 di = malloc(sizeof(struct devinfo));
903 di->fd = fd;
904 di->devname = devname;
905 di->disk = *dk;
906 di->next = NULL;
907 *dip = di;
908
909 return 0;
910 }
911 #endif
912
913 static void locate_bitmap1(struct supertype *st, int fd);
914
915 static int store_super1(struct supertype *st, int fd)
916 {
917 struct mdp_superblock_1 *sb = st->sb;
918 unsigned long long sb_offset;
919 int sbsize;
920 unsigned long long dsize;
921
922 if (!get_dev_size(fd, NULL, &dsize))
923 return 1;
924
925 dsize >>= 9;
926
927 if (dsize < 24)
928 return 2;
929
930 /*
931 * Calculate the position of the superblock.
932 * It is always aligned to a 4K boundary and
933 * depending on minor_version, it can be:
934 * 0: At least 8K, but less than 12K, from end of device
935 * 1: At start of device
936 * 2: 4K from start of device.
937 */
938 switch(st->minor_version) {
939 case 0:
940 sb_offset = dsize;
941 sb_offset -= 8*2;
942 sb_offset &= ~(4*2-1);
943 break;
944 case 1:
945 sb_offset = 0;
946 break;
947 case 2:
948 sb_offset = 4*2;
949 break;
950 default:
951 return -EINVAL;
952 }
953
954
955
956 if (sb_offset != __le64_to_cpu(sb->super_offset) &&
957 0 != __le64_to_cpu(sb->super_offset)
958 ) {
959 fprintf(stderr, Name ": internal error - sb_offset is wrong\n");
960 abort();
961 }
962
963 if (lseek64(fd, sb_offset << 9, 0)< 0LL)
964 return 3;
965
966 sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev);
967 sbsize = (sbsize+511)&(~511UL);
968
969 if (awrite(fd, sb, sbsize) != sbsize)
970 return 4;
971
972 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
973 struct bitmap_super_s *bm = (struct bitmap_super_s*)
974 (((char*)sb)+1024);
975 if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
976 locate_bitmap1(st, fd);
977 if (awrite(fd, bm, sizeof(*bm)) !=
978 sizeof(*bm))
979 return 5;
980 }
981 }
982 fsync(fd);
983 return 0;
984 }
985
986 static int load_super1(struct supertype *st, int fd, char *devname);
987
988 static unsigned long choose_bm_space(unsigned long devsize)
989 {
990 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
991 * if bigger than 200Gig, save 128k
992 */
993 if (devsize < 64*2) return 0;
994 if (devsize - 64*2 >= 200*1024*1024*2)
995 return 128*2;
996 if (devsize - 4*2 > 8*1024*1024*2)
997 return 64*2;
998 return 4*2;
999 }
1000
1001 #ifndef MDASSEMBLE
1002 static int write_init_super1(struct supertype *st)
1003 {
1004 struct mdp_superblock_1 *sb = st->sb;
1005 struct supertype refst;
1006 int rfd;
1007 int rv = 0;
1008 int bm_space;
1009 struct devinfo *di;
1010 unsigned long long dsize, array_size;
1011 long long sb_offset;
1012
1013 for (di = st->info; di && ! rv ; di = di->next) {
1014 if (di->disk.state == 1)
1015 continue;
1016 if (di->fd < 0)
1017 continue;
1018
1019 while (Kill(di->devname, NULL, 0, 1, 1) == 0)
1020 ;
1021
1022 sb->dev_number = __cpu_to_le32(di->disk.number);
1023 if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY))
1024 sb->devflags |= __cpu_to_le32(WriteMostly1);
1025
1026 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
1027 read(rfd, sb->device_uuid, 16) != 16) {
1028 __u32 r[4] = {random(), random(), random(), random()};
1029 memcpy(sb->device_uuid, r, 16);
1030 }
1031 if (rfd >= 0)
1032 close(rfd);
1033
1034 sb->events = 0;
1035
1036 refst =*st;
1037 refst.sb = NULL;
1038 if (load_super1(&refst, di->fd, NULL)==0) {
1039 struct mdp_superblock_1 *refsb = refst.sb;
1040
1041 memcpy(sb->device_uuid, refsb->device_uuid, 16);
1042 if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
1043 /* same array, so preserve events and
1044 * dev_number */
1045 sb->events = refsb->events;
1046 /* bugs in 2.6.17 and earlier mean the
1047 * dev_number chosen in Manage must be preserved
1048 */
1049 if (get_linux_version() >= 2006018)
1050 sb->dev_number = refsb->dev_number;
1051 }
1052 free(refsb);
1053 }
1054
1055 if (!get_dev_size(di->fd, NULL, &dsize))
1056 return 1;
1057 dsize >>= 9;
1058
1059 if (dsize < 24) {
1060 close(di->fd);
1061 return 2;
1062 }
1063
1064
1065 /*
1066 * Calculate the position of the superblock.
1067 * It is always aligned to a 4K boundary and
1068 * depending on minor_version, it can be:
1069 * 0: At least 8K, but less than 12K, from end of device
1070 * 1: At start of device
1071 * 2: 4K from start of device.
1072 * Depending on the array size, we might leave extra space
1073 * for a bitmap.
1074 */
1075 array_size = __le64_to_cpu(sb->size);
1076 /* work out how much space we left for a bitmap */
1077 bm_space = choose_bm_space(array_size);
1078
1079 switch(st->minor_version) {
1080 case 0:
1081 sb_offset = dsize;
1082 sb_offset -= 8*2;
1083 sb_offset &= ~(4*2-1);
1084 sb->super_offset = __cpu_to_le64(sb_offset);
1085 sb->data_offset = __cpu_to_le64(0);
1086 if (sb_offset - bm_space < array_size)
1087 bm_space = sb_offset - array_size;
1088 sb->data_size = __cpu_to_le64(sb_offset - bm_space);
1089 break;
1090 case 1:
1091 sb->super_offset = __cpu_to_le64(0);
1092 if (4*2 + bm_space + __le64_to_cpu(sb->size) > dsize)
1093 bm_space = dsize - __le64_to_cpu(sb->size) -4*2;
1094 sb->data_offset = __cpu_to_le64(bm_space + 4*2);
1095 sb->data_size = __cpu_to_le64(dsize - bm_space - 4*2);
1096 break;
1097 case 2:
1098 sb_offset = 4*2;
1099 sb->super_offset = __cpu_to_le64(4*2);
1100 if (4*2 + 4*2 + bm_space + __le64_to_cpu(sb->size)
1101 > dsize)
1102 bm_space = dsize - __le64_to_cpu(sb->size)
1103 - 4*2 - 4*2;
1104 sb->data_offset = __cpu_to_le64(4*2 + 4*2 + bm_space);
1105 sb->data_size = __cpu_to_le64(dsize - 4*2 - 4*2
1106 - bm_space );
1107 break;
1108 default:
1109 return -EINVAL;
1110 }
1111
1112
1113 sb->sb_csum = calc_sb_1_csum(sb);
1114 rv = store_super1(st, di->fd);
1115 if (rv)
1116 fprintf(stderr,
1117 Name ": failed to write superblock to %s\n",
1118 di->devname);
1119
1120 if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1))
1121 rv = st->ss->write_bitmap(st, di->fd);
1122 close(di->fd);
1123 di->fd = -1;
1124 }
1125 return rv;
1126 }
1127 #endif
1128
1129 static int compare_super1(struct supertype *st, struct supertype *tst)
1130 {
1131 /*
1132 * return:
1133 * 0 same, or first was empty, and second was copied
1134 * 1 second had wrong number
1135 * 2 wrong uuid
1136 * 3 wrong other info
1137 */
1138 struct mdp_superblock_1 *first = st->sb;
1139 struct mdp_superblock_1 *second = tst->sb;
1140
1141 if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
1142 return 1;
1143 if (second->major_version != __cpu_to_le32(1))
1144 return 1;
1145
1146 if (!first) {
1147 if (posix_memalign((void**)&first, 512,
1148 1024 + 512 +
1149 sizeof(struct misc_dev_info)) != 0) {
1150 fprintf(stderr, Name
1151 ": %s could not allocate superblock\n", __func__);
1152 return 1;
1153 }
1154 memcpy(first, second, 1024 + 512 +
1155 sizeof(struct misc_dev_info));
1156 st->sb = first;
1157 return 0;
1158 }
1159 if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
1160 return 2;
1161
1162 if (first->ctime != second->ctime ||
1163 first->level != second->level ||
1164 first->layout != second->layout ||
1165 first->size != second->size ||
1166 first->chunksize != second->chunksize ||
1167 first->raid_disks != second->raid_disks)
1168 return 3;
1169 return 0;
1170 }
1171
1172 static void free_super1(struct supertype *st);
1173
1174 static int load_super1(struct supertype *st, int fd, char *devname)
1175 {
1176 unsigned long long dsize;
1177 unsigned long long sb_offset;
1178 struct mdp_superblock_1 *super;
1179 int uuid[4];
1180 struct bitmap_super_s *bsb;
1181 struct misc_dev_info *misc;
1182
1183 free_super1(st);
1184
1185 if (st->subarray[0])
1186 return 1;
1187
1188 if (st->ss == NULL || st->minor_version == -1) {
1189 int bestvers = -1;
1190 struct supertype tst;
1191 __u64 bestctime = 0;
1192 /* guess... choose latest ctime */
1193 memset(&tst, 0, sizeof(tst));
1194 tst.ss = &super1;
1195 for (tst.minor_version = 0; tst.minor_version <= 2 ; tst.minor_version++) {
1196 switch(load_super1(&tst, fd, devname)) {
1197 case 0: super = tst.sb;
1198 if (bestvers == -1 ||
1199 bestctime < __le64_to_cpu(super->ctime)) {
1200 bestvers = tst.minor_version;
1201 bestctime = __le64_to_cpu(super->ctime);
1202 }
1203 free(super);
1204 tst.sb = NULL;
1205 break;
1206 case 1: return 1; /*bad device */
1207 case 2: break; /* bad, try next */
1208 }
1209 }
1210 if (bestvers != -1) {
1211 int rv;
1212 tst.minor_version = bestvers;
1213 tst.ss = &super1;
1214 tst.max_devs = 384;
1215 rv = load_super1(&tst, fd, devname);
1216 if (rv == 0)
1217 *st = tst;
1218 return rv;
1219 }
1220 return 2;
1221 }
1222 if (!get_dev_size(fd, devname, &dsize))
1223 return 1;
1224 dsize >>= 9;
1225
1226 if (dsize < 24) {
1227 if (devname)
1228 fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n",
1229 devname, dsize);
1230 return 1;
1231 }
1232
1233 /*
1234 * Calculate the position of the superblock.
1235 * It is always aligned to a 4K boundary and
1236 * depending on minor_version, it can be:
1237 * 0: At least 8K, but less than 12K, from end of device
1238 * 1: At start of device
1239 * 2: 4K from start of device.
1240 */
1241 switch(st->minor_version) {
1242 case 0:
1243 sb_offset = dsize;
1244 sb_offset -= 8*2;
1245 sb_offset &= ~(4*2-1);
1246 break;
1247 case 1:
1248 sb_offset = 0;
1249 break;
1250 case 2:
1251 sb_offset = 4*2;
1252 break;
1253 default:
1254 return -EINVAL;
1255 }
1256
1257 ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
1258
1259
1260 if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
1261 if (devname)
1262 fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
1263 devname, strerror(errno));
1264 return 1;
1265 }
1266
1267 if (posix_memalign((void**)&super, 512,
1268 1024 + 512 +
1269 sizeof(struct misc_dev_info)) != 0) {
1270 fprintf(stderr, Name ": %s could not allocate superblock\n",
1271 __func__);
1272 return 1;
1273 }
1274
1275 if (aread(fd, super, 1024) != 1024) {
1276 if (devname)
1277 fprintf(stderr, Name ": Cannot read superblock on %s\n",
1278 devname);
1279 free(super);
1280 return 1;
1281 }
1282
1283 if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) {
1284 if (devname)
1285 fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
1286 devname, MD_SB_MAGIC, __le32_to_cpu(super->magic));
1287 free(super);
1288 return 2;
1289 }
1290
1291 if (__le32_to_cpu(super->major_version) != 1) {
1292 if (devname)
1293 fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
1294 devname, __le32_to_cpu(super->major_version));
1295 free(super);
1296 return 2;
1297 }
1298 if (__le64_to_cpu(super->super_offset) != sb_offset) {
1299 if (devname)
1300 fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n",
1301 devname);
1302 free(super);
1303 return 2;
1304 }
1305 st->sb = super;
1306
1307 bsb = (struct bitmap_super_s *)(((char*)super)+1024);
1308
1309 misc = (struct misc_dev_info*) (((char*)super)+1024+512);
1310 misc->device_size = dsize;
1311
1312 /* Now check on the bitmap superblock */
1313 if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
1314 return 0;
1315 /* Read the bitmap superblock and make sure it looks
1316 * valid. If it doesn't clear the bit. An --assemble --force
1317 * should get that written out.
1318 */
1319 locate_bitmap1(st, fd);
1320 if (aread(fd, ((char*)super)+1024, 512)
1321 != 512)
1322 goto no_bitmap;
1323
1324 uuid_from_super1(st, uuid);
1325 if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
1326 memcmp(bsb->uuid, uuid, 16) != 0)
1327 goto no_bitmap;
1328 return 0;
1329
1330 no_bitmap:
1331 super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1);
1332 return 0;
1333 }
1334
1335
1336 static struct supertype *match_metadata_desc1(char *arg)
1337 {
1338 struct supertype *st = malloc(sizeof(*st));
1339 if (!st) return st;
1340
1341 memset(st, 0, sizeof(*st));
1342 st->ss = &super1;
1343 st->max_devs = 384;
1344 st->sb = NULL;
1345 /* leading zeros can be safely ignored. --detail generates them. */
1346 while (*arg == '0')
1347 arg++;
1348 if (strcmp(arg, "1.0") == 0 ||
1349 strcmp(arg, "1.00") == 0) {
1350 st->minor_version = 0;
1351 return st;
1352 }
1353 if (strcmp(arg, "1.1") == 0 ||
1354 strcmp(arg, "1.01") == 0 ||
1355 strcmp(arg, "default") == 0 ||
1356 strcmp(arg, "") == 0 /* no metadata */
1357 ) {
1358 st->minor_version = 1;
1359 return st;
1360 }
1361 if (strcmp(arg, "1.2") == 0 ||
1362 strcmp(arg, "1.02") == 0) {
1363 st->minor_version = 2;
1364 return st;
1365 }
1366 if (strcmp(arg, "1") == 0 ||
1367 strcmp(arg, "default") == 0) {
1368 st->minor_version = -1;
1369 return st;
1370 }
1371
1372 free(st);
1373 return NULL;
1374 }
1375
1376 /* find available size on device with this devsize, using
1377 * superblock type st, and reserving 'reserve' sectors for
1378 * a possible bitmap
1379 */
1380 static __u64 avail_size1(struct supertype *st, __u64 devsize)
1381 {
1382 struct mdp_superblock_1 *super = st->sb;
1383 if (devsize < 24)
1384 return 0;
1385
1386 if (super == NULL)
1387 /* creating: allow suitable space for bitmap */
1388 devsize -= choose_bm_space(devsize);
1389 #ifndef MDASSEMBLE
1390 else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
1391 /* hot-add. allow for actual size of bitmap */
1392 struct bitmap_super_s *bsb;
1393 bsb = (struct bitmap_super_s *)(((char*)super)+1024);
1394 devsize -= bitmap_sectors(bsb);
1395 }
1396 #endif
1397
1398 switch(st->minor_version) {
1399 case -1: /* no specified. Now time to set default */
1400 st->minor_version = 0;
1401 /* FALL THROUGH */
1402 case 0:
1403 /* at end */
1404 return ((devsize - 8*2 ) & ~(4*2-1));
1405 case 1:
1406 /* at start, 4K for superblock and possible bitmap */
1407 return devsize - 4*2;
1408 case 2:
1409 /* 4k from start, 4K for superblock and possible bitmap */
1410 return devsize - (4+4)*2;
1411 }
1412 return 0;
1413 }
1414
1415 static int
1416 add_internal_bitmap1(struct supertype *st,
1417 int *chunkp, int delay, int write_behind,
1418 unsigned long long size,
1419 int may_change, int major)
1420 {
1421 /*
1422 * If not may_change, then this is a 'Grow', and the bitmap
1423 * must fit after the superblock.
1424 * If may_change, then this is create, and we can put the bitmap
1425 * before the superblock if we like, or may move the start.
1426 * If !may_change, the bitmap MUST live at offset of 1K, until
1427 * we get a sysfs interface.
1428 *
1429 * size is in sectors, chunk is in bytes !!!
1430 */
1431
1432 unsigned long long bits;
1433 unsigned long long max_bits;
1434 unsigned long long min_chunk;
1435 long offset;
1436 int chunk = *chunkp;
1437 int room = 0;
1438 struct mdp_superblock_1 *sb = st->sb;
1439 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024);
1440
1441 switch(st->minor_version) {
1442 case 0:
1443 /* either 3K after the superblock, or some amount of space
1444 * before.
1445 */
1446 if (may_change) {
1447 /* We are creating array, so we *know* how much room has
1448 * been left.
1449 */
1450 offset = 0;
1451 room = choose_bm_space(__le64_to_cpu(sb->size));
1452 if (room == 4*2) {
1453 /* make it 3K after the superblock */
1454 room = 3*2;
1455 offset = 2;
1456 }
1457 } else {
1458 room = __le64_to_cpu(sb->super_offset)
1459 - __le64_to_cpu(sb->data_offset)
1460 - __le64_to_cpu(sb->data_size);
1461 /* remove '1 ||' when we can set offset via sysfs */
1462 if (1 || (room < 3*2 &&
1463 __le32_to_cpu(sb->max_dev) <= 384)) {
1464 room = 3*2;
1465 offset = 1*2;
1466 } else {
1467 offset = 0; /* means movable offset */
1468 }
1469 }
1470 break;
1471 case 1:
1472 case 2: /* between superblock and data */
1473 if (may_change) {
1474 offset = 4*2;
1475 room = choose_bm_space(__le64_to_cpu(sb->size));
1476 } else {
1477 room = __le64_to_cpu(sb->data_offset)
1478 - __le64_to_cpu(sb->super_offset);
1479 if (1 || __le32_to_cpu(sb->max_dev) <= 384) {
1480 room -= 2;
1481 offset = 2;
1482 } else {
1483 room -= 4*2;
1484 offset = 4*2;
1485 }
1486 }
1487 break;
1488 default:
1489 return 0;
1490 }
1491
1492 if (chunk == UnSet && room > 128*2)
1493 /* Limit to 128K of bitmap when chunk size not requested */
1494 room = 128*2;
1495
1496 max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8;
1497
1498 min_chunk = 4096; /* sub-page chunks don't work yet.. */
1499 bits = (size*512)/min_chunk +1;
1500 while (bits > max_bits) {
1501 min_chunk *= 2;
1502 bits = (bits+1)/2;
1503 }
1504 if (chunk == UnSet) {
1505 /* For practical purpose, 64Meg is a good
1506 * default chunk size for internal bitmaps.
1507 */
1508 chunk = min_chunk;
1509 if (chunk < 64*1024*1024)
1510 chunk = 64*1024*1024;
1511 } else if (chunk < min_chunk)
1512 return 0; /* chunk size too small */
1513 if (chunk == 0) /* rounding problem */
1514 return 0;
1515
1516 if (offset == 0) {
1517 bits = (size*512) / chunk + 1;
1518 room = ((bits+7)/8 + sizeof(bitmap_super_t) +511)/512;
1519 offset = -room;
1520 }
1521
1522 sb->bitmap_offset = __cpu_to_le32(offset);
1523
1524 sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1);
1525 memset(bms, 0, sizeof(*bms));
1526 bms->magic = __cpu_to_le32(BITMAP_MAGIC);
1527 bms->version = __cpu_to_le32(major);
1528 uuid_from_super1(st, (int*)bms->uuid);
1529 bms->chunksize = __cpu_to_le32(chunk);
1530 bms->daemon_sleep = __cpu_to_le32(delay);
1531 bms->sync_size = __cpu_to_le64(size);
1532 bms->write_behind = __cpu_to_le32(write_behind);
1533
1534 *chunkp = chunk;
1535 return 1;
1536 }
1537
1538
1539 static void locate_bitmap1(struct supertype *st, int fd)
1540 {
1541 unsigned long long offset;
1542 struct mdp_superblock_1 *sb;
1543 int mustfree = 0;
1544
1545 if (!st->sb) {
1546 if (st->ss->load_super(st, fd, NULL))
1547 return; /* no error I hope... */
1548 mustfree = 1;
1549 }
1550 sb = st->sb;
1551
1552 offset = __le64_to_cpu(sb->super_offset);
1553 offset += (int32_t) __le32_to_cpu(sb->bitmap_offset);
1554 if (mustfree)
1555 free(sb);
1556 lseek64(fd, offset<<9, 0);
1557 }
1558
1559 static int write_bitmap1(struct supertype *st, int fd)
1560 {
1561 struct mdp_superblock_1 *sb = st->sb;
1562 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024);
1563 int rv = 0;
1564
1565 int towrite, n;
1566 char *buf = (char*)(((long)(abuf+4096))&~4095UL);
1567
1568 locate_bitmap1(st, fd);
1569
1570 memset(buf, 0xff, 4096);
1571 memcpy(buf, ((char*)sb)+1024, sizeof(bitmap_super_t));
1572
1573 towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
1574 towrite = (towrite+7) >> 3; /* bits to bytes */
1575 towrite += sizeof(bitmap_super_t);
1576 towrite = ROUND_UP(towrite, 512);
1577 while (towrite > 0) {
1578 n = towrite;
1579 if (n > 4096)
1580 n = 4096;
1581 n = write(fd, buf, n);
1582 if (n > 0)
1583 towrite -= n;
1584 else
1585 break;
1586 memset(buf, 0xff, 4096);
1587 }
1588 fsync(fd);
1589 if (towrite)
1590 rv = -2;
1591
1592 return rv;
1593 }
1594
1595 static void free_super1(struct supertype *st)
1596 {
1597 if (st->sb)
1598 free(st->sb);
1599 st->sb = NULL;
1600 }
1601
1602 #ifndef MDASSEMBLE
1603 static int validate_geometry1(struct supertype *st, int level,
1604 int layout, int raiddisks,
1605 int chunk, unsigned long long size,
1606 char *subdev, unsigned long long *freesize,
1607 int verbose)
1608 {
1609 unsigned long long ldsize;
1610 int fd;
1611
1612 if (level == LEVEL_CONTAINER) {
1613 if (verbose)
1614 fprintf(stderr, Name ": 1.x metadata does not support containers\n");
1615 return 0;
1616 }
1617 if (!subdev)
1618 return 1;
1619
1620 fd = open(subdev, O_RDONLY|O_EXCL, 0);
1621 if (fd < 0) {
1622 if (verbose)
1623 fprintf(stderr, Name ": super1.x cannot open %s: %s\n",
1624 subdev, strerror(errno));
1625 return 0;
1626 }
1627
1628 if (!get_dev_size(fd, subdev, &ldsize)) {
1629 close(fd);
1630 return 0;
1631 }
1632 close(fd);
1633
1634 *freesize = avail_size1(st, ldsize >> 9);
1635 return 1;
1636 }
1637 #endif /* MDASSEMBLE */
1638
1639 struct superswitch super1 = {
1640 #ifndef MDASSEMBLE
1641 .examine_super = examine_super1,
1642 .brief_examine_super = brief_examine_super1,
1643 .export_examine_super = export_examine_super1,
1644 .detail_super = detail_super1,
1645 .brief_detail_super = brief_detail_super1,
1646 .export_detail_super = export_detail_super1,
1647 .write_init_super = write_init_super1,
1648 .validate_geometry = validate_geometry1,
1649 .add_to_super = add_to_super1,
1650 #endif
1651 .match_home = match_home1,
1652 .uuid_from_super = uuid_from_super1,
1653 .getinfo_super = getinfo_super1,
1654 .update_super = update_super1,
1655 .init_super = init_super1,
1656 .store_super = store_super1,
1657 .compare_super = compare_super1,
1658 .load_super = load_super1,
1659 .match_metadata_desc = match_metadata_desc1,
1660 .avail_size = avail_size1,
1661 .add_internal_bitmap = add_internal_bitmap1,
1662 .locate_bitmap = locate_bitmap1,
1663 .write_bitmap = write_bitmap1,
1664 .free_super = free_super1,
1665 #if __BYTE_ORDER == BIG_ENDIAN
1666 .swapuuid = 0,
1667 #else
1668 .swapuuid = 1,
1669 #endif
1670 .name = "1.x",
1671 };
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