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getinfo_super1: Use MaxSector in place of sb->size
[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
115 /* make sure I can count... */
116 if (offsetof(struct mdp_superblock_1,data_offset) != 128 ||
117 offsetof(struct mdp_superblock_1, utime) != 192 ||
118 sizeof(struct mdp_superblock_1) != 256) {
119 fprintf(stderr, "WARNING - superblock isn't sized correctly\n");
120 }
121
122 disk_csum = sb->sb_csum;
123 sb->sb_csum = 0;
124 newcsum = 0;
125 for (; size>=4; size -= 4 ) {
126 newcsum += __le32_to_cpu(*isuper);
127 isuper++;
128 }
129
130 if (size == 2)
131 newcsum += __le16_to_cpu(*(unsigned short*) isuper);
132
133 csum = (newcsum & 0xffffffff) + (newcsum >> 32);
134 sb->sb_csum = disk_csum;
135 return __cpu_to_le32(csum);
136 }
137
138 static char abuf[4096+4096];
139 static int aread(int fd, void *buf, int len)
140 {
141 /* aligned read.
142 * On devices with a 4K sector size, we need to read
143 * the full sector and copy relevant bits into
144 * the buffer
145 */
146 int bsize;
147 char *b;
148 int n;
149 if (ioctl(fd, BLKSSZGET, &bsize) != 0 ||
150 bsize <= len)
151 return read(fd, buf, len);
152 if (bsize > 4096)
153 return -1;
154 b = (char*)(((long)(abuf+4096))&~4095UL);
155
156 n = read(fd, b, bsize);
157 if (n <= 0)
158 return n;
159 lseek(fd, len - n, 1);
160 if (n > len)
161 n = len;
162 memcpy(buf, b, n);
163 return n;
164 }
165
166 static int awrite(int fd, void *buf, int len)
167 {
168 /* aligned write.
169 * On devices with a 4K sector size, we need to write
170 * the full sector. We pre-read if the sector is larger
171 * than the write.
172 * The address must be sector-aligned.
173 */
174 int bsize;
175 char *b;
176 int n;
177 if (ioctl(fd, BLKSSZGET, &bsize) != 0 ||
178 bsize <= len)
179 return write(fd, buf, len);
180 if (bsize > 4096)
181 return -1;
182 b = (char*)(((long)(abuf+4096))&~4095UL);
183
184 n = read(fd, b, bsize);
185 if (n <= 0)
186 return n;
187 lseek(fd, -n, 1);
188 memcpy(b, buf, len);
189 n = write(fd, b, bsize);
190 if (n <= 0)
191 return n;
192 lseek(fd, len - n, 1);
193 return len;
194 }
195
196 #ifndef MDASSEMBLE
197 static void examine_super1(struct supertype *st, char *homehost)
198 {
199 struct mdp_superblock_1 *sb = st->sb;
200 time_t atime;
201 unsigned int d;
202 int role;
203 int delta_extra = 0;
204 int i;
205 char *c;
206 int l = homehost ? strlen(homehost) : 0;
207 int layout;
208 unsigned long long sb_offset;
209
210 printf(" Magic : %08x\n", __le32_to_cpu(sb->magic));
211 printf(" Version : 1");
212 sb_offset = __le64_to_cpu(sb->super_offset);
213 if (sb_offset <= 4)
214 printf(".1\n");
215 else if (sb_offset <= 8)
216 printf(".2\n");
217 else
218 printf(".0\n");
219 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map));
220 printf(" Array UUID : ");
221 for (i=0; i<16; i++) {
222 if ((i&3)==0 && i != 0) printf(":");
223 printf("%02x", sb->set_uuid[i]);
224 }
225 printf("\n");
226 printf(" Name : %.32s", sb->set_name);
227 if (l > 0 && l < 32 &&
228 sb->set_name[l] == ':' &&
229 strncmp(sb->set_name, homehost, l) == 0)
230 printf(" (local to host %s)", homehost);
231 printf("\n");
232 atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL;
233 printf(" Creation Time : %.24s\n", ctime(&atime));
234 c=map_num(pers, __le32_to_cpu(sb->level));
235 printf(" Raid Level : %s\n", c?c:"-unknown-");
236 printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks));
237 printf("\n");
238 printf(" Avail Dev Size : %llu%s\n",
239 (unsigned long long)__le64_to_cpu(sb->data_size),
240 human_size(__le64_to_cpu(sb->data_size)<<9));
241 if (__le32_to_cpu(sb->level) > 0) {
242 int ddsks=0;
243 switch(__le32_to_cpu(sb->level)) {
244 case 1: ddsks=1;break;
245 case 4:
246 case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break;
247 case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break;
248 case 10:
249 layout = __le32_to_cpu(sb->layout);
250 ddsks = __le32_to_cpu(sb->raid_disks)
251 / (layout&255) / ((layout>>8)&255);
252 }
253 if (ddsks)
254 printf(" Array Size : %llu%s\n",
255 ddsks*(unsigned long long)__le64_to_cpu(sb->size),
256 human_size(ddsks*__le64_to_cpu(sb->size)<<9));
257 if (sb->size != sb->data_size)
258 printf(" Used Dev Size : %llu%s\n",
259 (unsigned long long)__le64_to_cpu(sb->size),
260 human_size(__le64_to_cpu(sb->size)<<9));
261 }
262 if (sb->data_offset)
263 printf(" Data Offset : %llu sectors\n",
264 (unsigned long long)__le64_to_cpu(sb->data_offset));
265 printf(" Super Offset : %llu sectors\n",
266 (unsigned long long)__le64_to_cpu(sb->super_offset));
267 if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)
268 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset));
269 printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
270 printf(" Device UUID : ");
271 for (i=0; i<16; i++) {
272 if ((i&3)==0 && i != 0) printf(":");
273 printf("%02x", sb->device_uuid[i]);
274 }
275 printf("\n");
276 printf("\n");
277 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
278 printf("Internal Bitmap : %ld sectors from superblock\n",
279 (long)(int32_t)__le32_to_cpu(sb->bitmap_offset));
280 }
281 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
282 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2,
283 human_size(__le64_to_cpu(sb->reshape_position)<<9));
284 if (__le32_to_cpu(sb->delta_disks)) {
285 printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks));
286 printf(" (%d->%d)\n",
287 __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks),
288 __le32_to_cpu(sb->raid_disks));
289 if ((int)__le32_to_cpu(sb->delta_disks) < 0)
290 delta_extra = -__le32_to_cpu(sb->delta_disks);
291 }
292 if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) {
293 c = map_num(pers, __le32_to_cpu(sb->new_level));
294 printf(" New Level : %s\n", c?c:"-unknown-");
295 }
296 if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) {
297 if (__le32_to_cpu(sb->level) == 5) {
298 c = map_num(r5layout, __le32_to_cpu(sb->new_layout));
299 printf(" New Layout : %s\n", c?c:"-unknown-");
300 }
301 if (__le32_to_cpu(sb->level) == 6) {
302 c = map_num(r6layout, __le32_to_cpu(sb->new_layout));
303 printf(" New Layout : %s\n", c?c:"-unknown-");
304 }
305 if (__le32_to_cpu(sb->level) == 10) {
306 printf(" New Layout :");
307 print_r10_layout(__le32_to_cpu(sb->new_layout));
308 printf("\n");
309 }
310 }
311 if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize))
312 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2);
313 printf("\n");
314 }
315 if (sb->devflags) {
316 printf(" Flags :");
317 if (sb->devflags & WriteMostly1)
318 printf(" write-mostly");
319 printf("\n");
320 }
321
322 atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL;
323 printf(" Update Time : %.24s\n", ctime(&atime));
324
325 if (calc_sb_1_csum(sb) == sb->sb_csum)
326 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum));
327 else
328 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum),
329 __le32_to_cpu(calc_sb_1_csum(sb)));
330 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events));
331 printf("\n");
332 if (__le32_to_cpu(sb->level) == 5) {
333 c = map_num(r5layout, __le32_to_cpu(sb->layout));
334 printf(" Layout : %s\n", c?c:"-unknown-");
335 }
336 if (__le32_to_cpu(sb->level) == 6) {
337 c = map_num(r6layout, __le32_to_cpu(sb->layout));
338 printf(" Layout : %s\n", c?c:"-unknown-");
339 }
340 if (__le32_to_cpu(sb->level) == 10) {
341 int lo = __le32_to_cpu(sb->layout);
342 printf(" Layout :");
343 print_r10_layout(lo);
344 printf("\n");
345 }
346 switch(__le32_to_cpu(sb->level)) {
347 case 0:
348 case 4:
349 case 5:
350 case 6:
351 case 10:
352 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2);
353 break;
354 case -1:
355 printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2);
356 break;
357 default: break;
358 }
359 printf("\n");
360 #if 0
361 /* This turns out to just be confusing */
362 printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number));
363 for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--)
364 if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff)
365 break;
366 for (d=0; d < i; d++) {
367 int role = __le16_to_cpu(sb->dev_roles[d]);
368 if (d) printf(", ");
369 if (role == 0xffff) printf("empty");
370 else if(role == 0xfffe) printf("failed");
371 else printf("%d", role);
372 }
373 printf(")\n");
374 #endif
375 printf(" Device Role : ");
376 d = __le32_to_cpu(sb->dev_number);
377 if (d < __le32_to_cpu(sb->max_dev))
378 role = __le16_to_cpu(sb->dev_roles[d]);
379 else
380 role = 0xFFFF;
381 if (role >= 0xFFFE)
382 printf("spare\n");
383 else
384 printf("Active device %d\n", role);
385
386 printf(" Array State : ");
387 for (d=0; d<__le32_to_cpu(sb->raid_disks) + delta_extra; d++) {
388 int cnt = 0;
389 unsigned int i;
390 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
391 unsigned int role = __le16_to_cpu(sb->dev_roles[i]);
392 if (role == d)
393 cnt++;
394 }
395 if (cnt > 1) printf("?");
396 else if (cnt == 1) printf("A");
397 else printf (".");
398 }
399 #if 0
400 /* This is confusing too */
401 faulty = 0;
402 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
403 int role = __le16_to_cpu(sb->dev_roles[i]);
404 if (role == 0xFFFE)
405 faulty++;
406 }
407 if (faulty) printf(" %d failed", faulty);
408 #endif
409 printf(" ('A' == active, '.' == missing)");
410 printf("\n");
411 }
412
413
414 static void brief_examine_super1(struct supertype *st, int verbose)
415 {
416 struct mdp_superblock_1 *sb = st->sb;
417 int i;
418 unsigned long long sb_offset;
419 char *nm;
420 char *c=map_num(pers, __le32_to_cpu(sb->level));
421
422 nm = strchr(sb->set_name, ':');
423 if (nm)
424 nm++;
425 else if (sb->set_name[0])
426 nm = sb->set_name;
427 else
428 nm = NULL;
429
430 printf("ARRAY%s%s", nm ? " /dev/md/":"", nm);
431 if (verbose && c)
432 printf(" level=%s", c);
433 sb_offset = __le64_to_cpu(sb->super_offset);
434 if (sb_offset <= 4)
435 printf(" metadata=1.1 ");
436 else if (sb_offset <= 8)
437 printf(" metadata=1.2 ");
438 else
439 printf(" metadata=1.0 ");
440 if (verbose)
441 printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks));
442 printf("UUID=");
443 for (i=0; i<16; i++) {
444 if ((i&3)==0 && i != 0) printf(":");
445 printf("%02x", sb->set_uuid[i]);
446 }
447 if (sb->set_name[0])
448 printf(" name=%.32s", sb->set_name);
449 printf("\n");
450 }
451
452 static void export_examine_super1(struct supertype *st)
453 {
454 struct mdp_superblock_1 *sb = st->sb;
455 int i;
456 int len = 32;
457
458 printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level)));
459 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks));
460 for (i=0; i<32; i++)
461 if (sb->set_name[i] == '\n' ||
462 sb->set_name[i] == '\0') {
463 len = i;
464 break;
465 }
466 if (len)
467 printf("MD_NAME=%.*s\n", len, sb->set_name);
468 printf("MD_UUID=");
469 for (i=0; i<16; i++) {
470 if ((i&3)==0 && i != 0) printf(":");
471 printf("%02x", sb->set_uuid[i]);
472 }
473 printf("\n");
474 printf("MD_UPDATE_TIME=%llu\n",
475 __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL);
476 printf("MD_DEV_UUID=");
477 for (i=0; i<16; i++) {
478 if ((i&3)==0 && i != 0) printf(":");
479 printf("%02x", sb->device_uuid[i]);
480 }
481 printf("\n");
482 printf("MD_EVENTS=%llu\n",
483 (unsigned long long)__le64_to_cpu(sb->events));
484 }
485
486 static void detail_super1(struct supertype *st, char *homehost)
487 {
488 struct mdp_superblock_1 *sb = st->sb;
489 int i;
490 int l = homehost ? strlen(homehost) : 0;
491
492 printf(" Name : %.32s", sb->set_name);
493 if (l > 0 && l < 32 &&
494 sb->set_name[l] == ':' &&
495 strncmp(sb->set_name, homehost, l) == 0)
496 printf(" (local to host %s)", homehost);
497 printf("\n UUID : ");
498 for (i=0; i<16; i++) {
499 if ((i&3)==0 && i != 0) printf(":");
500 printf("%02x", sb->set_uuid[i]);
501 }
502 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events));
503 }
504
505 static void brief_detail_super1(struct supertype *st)
506 {
507 struct mdp_superblock_1 *sb = st->sb;
508 int i;
509
510 if (sb->set_name[0])
511 printf(" name=%.32s", sb->set_name);
512 printf(" UUID=");
513 for (i=0; i<16; i++) {
514 if ((i&3)==0 && i != 0) printf(":");
515 printf("%02x", sb->set_uuid[i]);
516 }
517 }
518
519 static void export_detail_super1(struct supertype *st)
520 {
521 struct mdp_superblock_1 *sb = st->sb;
522 int i;
523 int len = 32;
524
525 for (i=0; i<32; i++)
526 if (sb->set_name[i] == '\n' ||
527 sb->set_name[i] == '\0') {
528 len = i;
529 break;
530 }
531 if (len)
532 printf("MD_NAME=%.*s\n", len, sb->set_name);
533 }
534
535 #endif
536
537 static int match_home1(struct supertype *st, char *homehost)
538 {
539 struct mdp_superblock_1 *sb = st->sb;
540 int l = homehost ? strlen(homehost) : 0;
541
542 return (l > 0 && l < 32 &&
543 sb->set_name[l] == ':' &&
544 strncmp(sb->set_name, homehost, l) == 0);
545 }
546
547 static void uuid_from_super1(struct supertype *st, int uuid[4])
548 {
549 struct mdp_superblock_1 *super = st->sb;
550 char *cuuid = (char*)uuid;
551 int i;
552 for (i=0; i<16; i++)
553 cuuid[i] = super->set_uuid[i];
554 }
555
556 static void getinfo_super1(struct supertype *st, struct mdinfo *info, char *map)
557 {
558 struct mdp_superblock_1 *sb = st->sb;
559 int working = 0;
560 unsigned int i;
561 unsigned int role;
562 unsigned int map_disks = info->array.raid_disks;
563
564 memset(info, 0, sizeof(*info));
565 info->array.major_version = 1;
566 info->array.minor_version = st->minor_version;
567 info->array.patch_version = 0;
568 info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
569 info->array.level = __le32_to_cpu(sb->level);
570 info->array.layout = __le32_to_cpu(sb->layout);
571 info->array.md_minor = -1;
572 info->array.ctime = __le64_to_cpu(sb->ctime);
573 info->array.utime = __le64_to_cpu(sb->utime);
574 info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
575 info->array.state =
576 (__le64_to_cpu(sb->resync_offset) == MaxSector)
577 ? 1 : 0;
578
579 info->data_offset = __le64_to_cpu(sb->data_offset);
580 info->component_size = __le64_to_cpu(sb->size);
581 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET))
582 info->bitmap_offset = __le32_to_cpu(sb->bitmap_offset);
583
584 info->disk.major = 0;
585 info->disk.minor = 0;
586 info->disk.number = __le32_to_cpu(sb->dev_number);
587 if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
588 __le32_to_cpu(sb->max_dev) > 512)
589 role = 0xfffe;
590 else
591 role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
592
593 info->disk.raid_disk = -1;
594 switch(role) {
595 case 0xFFFF:
596 info->disk.state = 0; /* spare: not active, not sync, not faulty */
597 break;
598 case 0xFFFE:
599 info->disk.state = 1; /* faulty */
600 break;
601 default:
602 info->disk.state = 6; /* active and in sync */
603 info->disk.raid_disk = role;
604 }
605 if (sb->devflags & WriteMostly1)
606 info->disk.state |= (1 << MD_DISK_WRITEMOSTLY);
607 info->events = __le64_to_cpu(sb->events);
608 sprintf(info->text_version, "1.%d", st->minor_version);
609 info->safe_mode_delay = 200;
610
611 memcpy(info->uuid, sb->set_uuid, 16);
612
613 strncpy(info->name, sb->set_name, 32);
614 info->name[32] = 0;
615
616 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET))
617 info->recovery_start = __le32_to_cpu(sb->recovery_offset);
618 else
619 info->recovery_start = MaxSector;
620
621 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
622 info->reshape_active = 1;
623 info->reshape_progress = __le64_to_cpu(sb->reshape_position);
624 info->new_level = __le32_to_cpu(sb->new_level);
625 info->delta_disks = __le32_to_cpu(sb->delta_disks);
626 info->new_layout = __le32_to_cpu(sb->new_layout);
627 info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
628 if (info->delta_disks < 0)
629 info->array.raid_disks -= info->delta_disks;
630 } else
631 info->reshape_active = 0;
632
633 info->recovery_blocked = info->reshape_active;
634
635 if (map)
636 for (i=0; i<map_disks; i++)
637 map[i] = 0;
638 for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) {
639 role = __le16_to_cpu(sb->dev_roles[i]);
640 if (/*role == 0xFFFF || */role < (unsigned) info->array.raid_disks) {
641 working++;
642 if (map && role < map_disks)
643 map[role] = 1;
644 }
645 }
646
647 info->array.working_disks = working;
648 }
649
650 static struct mdinfo *container_content1(struct supertype *st, char *subarray)
651 {
652 struct mdinfo *info;
653
654 if (subarray)
655 return NULL;
656
657 info = malloc(sizeof(*info));
658 getinfo_super1(st, info, NULL);
659 return info;
660 }
661
662 static int update_super1(struct supertype *st, struct mdinfo *info,
663 char *update,
664 char *devname, int verbose,
665 int uuid_set, char *homehost)
666 {
667 /* NOTE: for 'assemble' and 'force' we need to return non-zero
668 * if any change was made. For others, the return value is
669 * ignored.
670 */
671 int rv = 0;
672 struct mdp_superblock_1 *sb = st->sb;
673
674 if (strcmp(update, "force-one")==0) {
675 /* Not enough devices for a working array,
676 * so bring this one up-to-date
677 */
678 if (sb->events != __cpu_to_le64(info->events))
679 rv = 1;
680 sb->events = __cpu_to_le64(info->events);
681 } else if (strcmp(update, "force-array")==0) {
682 /* Degraded array and 'force' requests to
683 * maybe need to mark it 'clean'.
684 */
685 switch(__le32_to_cpu(sb->level)) {
686 case 5: case 4: case 6:
687 /* need to force clean */
688 if (sb->resync_offset != MaxSector)
689 rv = 1;
690 sb->resync_offset = MaxSector;
691 }
692 } else if (strcmp(update, "assemble")==0) {
693 int d = info->disk.number;
694 int want;
695 if (info->disk.state == 6)
696 want = info->disk.raid_disk;
697 else
698 want = 0xFFFF;
699 if (sb->dev_roles[d] != __cpu_to_le16(want)) {
700 sb->dev_roles[d] = __cpu_to_le16(want);
701 rv = 1;
702 }
703 if (info->reshape_active &&
704 sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) &&
705 info->delta_disks >= 0 &&
706 info->reshape_progress < __le64_to_cpu(sb->reshape_position)) {
707 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
708 rv = 1;
709 }
710 if (info->reshape_active &&
711 sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) &&
712 info->delta_disks < 0 &&
713 info->reshape_progress > __le64_to_cpu(sb->reshape_position)) {
714 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
715 rv = 1;
716 }
717 } else if (strcmp(update, "linear-grow-new") == 0) {
718 unsigned int i;
719 int rfd, fd;
720 unsigned int max = __le32_to_cpu(sb->max_dev);
721
722 for (i=0 ; i < max ; i++)
723 if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe)
724 break;
725 sb->dev_number = __cpu_to_le32(i);
726 info->disk.number = i;
727 if (max >= __le32_to_cpu(sb->max_dev))
728 sb->max_dev = __cpu_to_le32(max+1);
729
730 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
731 read(rfd, sb->device_uuid, 16) != 16) {
732 __u32 r[4] = {random(), random(), random(), random()};
733 memcpy(sb->device_uuid, r, 16);
734 }
735 if (rfd >= 0)
736 close(rfd);
737
738 sb->dev_roles[i] =
739 __cpu_to_le16(info->disk.raid_disk);
740
741 fd = open(devname, O_RDONLY);
742 if (fd >= 0) {
743 unsigned long long ds;
744 get_dev_size(fd, devname, &ds);
745 close(fd);
746 ds >>= 9;
747 if (__le64_to_cpu(sb->super_offset) <
748 __le64_to_cpu(sb->data_offset)) {
749 sb->data_size = __cpu_to_le64(
750 ds - __le64_to_cpu(sb->data_offset));
751 } else {
752 ds -= 8*2;
753 ds &= ~(unsigned long long)(4*2-1);
754 sb->super_offset = __cpu_to_le64(ds);
755 sb->data_size = __cpu_to_le64(
756 ds - __le64_to_cpu(sb->data_offset));
757 }
758 }
759 } else if (strcmp(update, "linear-grow-update") == 0) {
760 sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
761 sb->dev_roles[info->disk.number] =
762 __cpu_to_le16(info->disk.raid_disk);
763 } else if (strcmp(update, "resync") == 0) {
764 /* make sure resync happens */
765 sb->resync_offset = 0ULL;
766 } else if (strcmp(update, "uuid") == 0) {
767 copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
768
769 if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
770 struct bitmap_super_s *bm;
771 bm = (struct bitmap_super_s*)(st->sb+1024);
772 memcpy(bm->uuid, sb->set_uuid, 16);
773 }
774 } else if (strcmp(update, "no-bitmap") == 0) {
775 sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);
776 } else if (strcmp(update, "homehost") == 0 &&
777 homehost) {
778 char *c;
779 update = "name";
780 c = strchr(sb->set_name, ':');
781 if (c)
782 strncpy(info->name, c+1, 31 - (c-sb->set_name));
783 else
784 strncpy(info->name, sb->set_name, 32);
785 info->name[32] = 0;
786 } else if (strcmp(update, "name") == 0) {
787 if (info->name[0] == 0)
788 sprintf(info->name, "%d", info->array.md_minor);
789 memset(sb->set_name, 0, sizeof(sb->set_name));
790 if (homehost &&
791 strchr(info->name, ':') == NULL &&
792 strlen(homehost)+1+strlen(info->name) < 32) {
793 strcpy(sb->set_name, homehost);
794 strcat(sb->set_name, ":");
795 strcat(sb->set_name, info->name);
796 } else
797 strcpy(sb->set_name, info->name);
798 } else if (strcmp(update, "devicesize") == 0 &&
799 __le64_to_cpu(sb->super_offset) <
800 __le64_to_cpu(sb->data_offset)) {
801 /* set data_size to device size less data_offset */
802 struct misc_dev_info *misc = (struct misc_dev_info*)
803 (st->sb + 1024 + 512);
804 printf("Size was %llu\n", (unsigned long long)
805 __le64_to_cpu(sb->data_size));
806 sb->data_size = __cpu_to_le64(
807 misc->device_size - __le64_to_cpu(sb->data_offset));
808 printf("Size is %llu\n", (unsigned long long)
809 __le64_to_cpu(sb->data_size));
810 } else if (strcmp(update, "_reshape_progress")==0)
811 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
812 else if (strcmp(update, "writemostly")==0)
813 sb->devflags |= WriteMostly1;
814 else if (strcmp(update, "readwrite")==0)
815 sb->devflags &= ~WriteMostly1;
816 else
817 rv = -1;
818
819 sb->sb_csum = calc_sb_1_csum(sb);
820 return rv;
821 }
822
823 static int init_super1(struct supertype *st, mdu_array_info_t *info,
824 unsigned long long size, char *name, char *homehost, int *uuid)
825 {
826 struct mdp_superblock_1 *sb;
827 int spares;
828 int rfd;
829 char defname[10];
830
831 if (posix_memalign((void**)&sb, 512, (1024 + 512 +
832 sizeof(struct misc_dev_info))) != 0) {
833 fprintf(stderr, Name
834 ": %s could not allocate superblock\n", __func__);
835 return 0;
836 }
837 memset(sb, 0, 1024);
838
839 st->sb = sb;
840 if (info == NULL) {
841 /* zeroing superblock */
842 return 0;
843 }
844
845 spares = info->working_disks - info->active_disks;
846 if (info->raid_disks + spares > 384) {
847 fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
848 info->raid_disks , spares, 384);
849 return 0;
850 }
851
852 sb->magic = __cpu_to_le32(MD_SB_MAGIC);
853 sb->major_version = __cpu_to_le32(1);
854 sb->feature_map = 0;
855 sb->pad0 = 0;
856
857 if (uuid)
858 copy_uuid(sb->set_uuid, uuid, super1.swapuuid);
859 else {
860 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
861 read(rfd, sb->set_uuid, 16) != 16) {
862 __u32 r[4] = {random(), random(), random(), random()};
863 memcpy(sb->set_uuid, r, 16);
864 }
865 if (rfd >= 0) close(rfd);
866 }
867
868 if (name == NULL || *name == 0) {
869 sprintf(defname, "%d", info->md_minor);
870 name = defname;
871 }
872 memset(sb->set_name, 0, 32);
873 if (homehost &&
874 strchr(name, ':')== NULL &&
875 strlen(homehost)+1+strlen(name) < 32) {
876 strcpy(sb->set_name, homehost);
877 strcat(sb->set_name, ":");
878 strcat(sb->set_name, name);
879 } else
880 strcpy(sb->set_name, name);
881
882 sb->ctime = __cpu_to_le64((unsigned long long)time(0));
883 sb->level = __cpu_to_le32(info->level);
884 sb->layout = __cpu_to_le32(info->layout);
885 sb->size = __cpu_to_le64(size*2ULL);
886 sb->chunksize = __cpu_to_le32(info->chunk_size>>9);
887 sb->raid_disks = __cpu_to_le32(info->raid_disks);
888
889 sb->data_offset = __cpu_to_le64(0);
890 sb->data_size = __cpu_to_le64(0);
891 sb->super_offset = __cpu_to_le64(0);
892 sb->recovery_offset = __cpu_to_le64(0);
893
894 sb->utime = sb->ctime;
895 sb->events = __cpu_to_le64(1);
896 if (info->state & (1<<MD_SB_CLEAN))
897 sb->resync_offset = MaxSector;
898 else
899 sb->resync_offset = 0;
900 sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/
901 sizeof(sb->dev_roles[0]));
902 memset(sb->pad3, 0, sizeof(sb->pad3));
903
904 memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1));
905
906 return 1;
907 }
908
909 struct devinfo {
910 int fd;
911 char *devname;
912 mdu_disk_info_t disk;
913 struct devinfo *next;
914 };
915 #ifndef MDASSEMBLE
916 /* Add a device to the superblock being created */
917 static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk,
918 int fd, char *devname)
919 {
920 struct mdp_superblock_1 *sb = st->sb;
921 __u16 *rp = sb->dev_roles + dk->number;
922 struct devinfo *di, **dip;
923
924 if ((dk->state & 6) == 6) /* active, sync */
925 *rp = __cpu_to_le16(dk->raid_disk);
926 else if ((dk->state & ~2) == 0) /* active or idle -> spare */
927 *rp = 0xffff;
928 else
929 *rp = 0xfffe;
930
931 if (dk->number >= (int)__le32_to_cpu(sb->max_dev) &&
932 __le32_to_cpu(sb->max_dev) < 384)
933 sb->max_dev = __cpu_to_le32(dk->number+1);
934
935 sb->dev_number = __cpu_to_le32(dk->number);
936 sb->devflags = 0; /* don't copy another disks flags */
937 sb->sb_csum = calc_sb_1_csum(sb);
938
939 dip = (struct devinfo **)&st->info;
940 while (*dip)
941 dip = &(*dip)->next;
942 di = malloc(sizeof(struct devinfo));
943 di->fd = fd;
944 di->devname = devname;
945 di->disk = *dk;
946 di->next = NULL;
947 *dip = di;
948
949 return 0;
950 }
951 #endif
952
953 static void locate_bitmap1(struct supertype *st, int fd);
954
955 static int store_super1(struct supertype *st, int fd)
956 {
957 struct mdp_superblock_1 *sb = st->sb;
958 unsigned long long sb_offset;
959 int sbsize;
960 unsigned long long dsize;
961
962 if (!get_dev_size(fd, NULL, &dsize))
963 return 1;
964
965 dsize >>= 9;
966
967 if (dsize < 24)
968 return 2;
969
970 /*
971 * Calculate the position of the superblock.
972 * It is always aligned to a 4K boundary and
973 * depending on minor_version, it can be:
974 * 0: At least 8K, but less than 12K, from end of device
975 * 1: At start of device
976 * 2: 4K from start of device.
977 */
978 switch(st->minor_version) {
979 case 0:
980 sb_offset = dsize;
981 sb_offset -= 8*2;
982 sb_offset &= ~(4*2-1);
983 break;
984 case 1:
985 sb_offset = 0;
986 break;
987 case 2:
988 sb_offset = 4*2;
989 break;
990 default:
991 return -EINVAL;
992 }
993
994
995
996 if (sb_offset != __le64_to_cpu(sb->super_offset) &&
997 0 != __le64_to_cpu(sb->super_offset)
998 ) {
999 fprintf(stderr, Name ": internal error - sb_offset is wrong\n");
1000 abort();
1001 }
1002
1003 if (lseek64(fd, sb_offset << 9, 0)< 0LL)
1004 return 3;
1005
1006 sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev);
1007 sbsize = (sbsize+511)&(~511UL);
1008
1009 if (awrite(fd, sb, sbsize) != sbsize)
1010 return 4;
1011
1012 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
1013 struct bitmap_super_s *bm = (struct bitmap_super_s*)
1014 (((char*)sb)+1024);
1015 if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
1016 locate_bitmap1(st, fd);
1017 if (awrite(fd, bm, sizeof(*bm)) !=
1018 sizeof(*bm))
1019 return 5;
1020 }
1021 }
1022 fsync(fd);
1023 return 0;
1024 }
1025
1026 static int load_super1(struct supertype *st, int fd, char *devname);
1027
1028 static unsigned long choose_bm_space(unsigned long devsize)
1029 {
1030 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
1031 * if bigger than 200Gig, save 128k
1032 * NOTE: result must be multiple of 4K else bad things happen
1033 * on 4K-sector devices.
1034 */
1035 if (devsize < 64*2) return 0;
1036 if (devsize - 64*2 >= 200*1024*1024*2)
1037 return 128*2;
1038 if (devsize - 4*2 > 8*1024*1024*2)
1039 return 64*2;
1040 return 4*2;
1041 }
1042
1043 static void free_super1(struct supertype *st);
1044
1045 #ifndef MDASSEMBLE
1046 static int write_init_super1(struct supertype *st)
1047 {
1048 struct mdp_superblock_1 *sb = st->sb;
1049 struct supertype *refst;
1050 int rfd;
1051 int rv = 0;
1052 unsigned long long bm_space;
1053 unsigned long long reserved;
1054 struct devinfo *di;
1055 unsigned long long dsize, array_size;
1056 unsigned long long sb_offset;
1057
1058 for (di = st->info; di && ! rv ; di = di->next) {
1059 if (di->disk.state == 1)
1060 continue;
1061 if (di->fd < 0)
1062 continue;
1063
1064 while (Kill(di->devname, NULL, 0, 1, 1) == 0)
1065 ;
1066
1067 sb->dev_number = __cpu_to_le32(di->disk.number);
1068 if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY))
1069 sb->devflags |= WriteMostly1;
1070 else
1071 sb->devflags &= ~WriteMostly1;
1072
1073 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
1074 read(rfd, sb->device_uuid, 16) != 16) {
1075 __u32 r[4] = {random(), random(), random(), random()};
1076 memcpy(sb->device_uuid, r, 16);
1077 }
1078 if (rfd >= 0)
1079 close(rfd);
1080
1081 sb->events = 0;
1082
1083 refst = dup_super(st);
1084 if (load_super1(refst, di->fd, NULL)==0) {
1085 struct mdp_superblock_1 *refsb = refst->sb;
1086
1087 memcpy(sb->device_uuid, refsb->device_uuid, 16);
1088 if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
1089 /* same array, so preserve events and
1090 * dev_number */
1091 sb->events = refsb->events;
1092 /* bugs in 2.6.17 and earlier mean the
1093 * dev_number chosen in Manage must be preserved
1094 */
1095 if (get_linux_version() >= 2006018)
1096 sb->dev_number = refsb->dev_number;
1097 }
1098 free_super1(refst);
1099 }
1100 free(refst);
1101
1102 if (!get_dev_size(di->fd, NULL, &dsize))
1103 return 1;
1104 dsize >>= 9;
1105
1106 if (dsize < 24) {
1107 close(di->fd);
1108 return 2;
1109 }
1110
1111
1112 /*
1113 * Calculate the position of the superblock.
1114 * It is always aligned to a 4K boundary and
1115 * depending on minor_version, it can be:
1116 * 0: At least 8K, but less than 12K, from end of device
1117 * 1: At start of device
1118 * 2: 4K from start of device.
1119 * Depending on the array size, we might leave extra space
1120 * for a bitmap.
1121 */
1122 array_size = __le64_to_cpu(sb->size);
1123 /* work out how much space we left for a bitmap */
1124 bm_space = choose_bm_space(array_size);
1125
1126 switch(st->minor_version) {
1127 case 0:
1128 sb_offset = dsize;
1129 sb_offset -= 8*2;
1130 sb_offset &= ~(4*2-1);
1131 sb->super_offset = __cpu_to_le64(sb_offset);
1132 sb->data_offset = __cpu_to_le64(0);
1133 if (sb_offset < array_size + bm_space)
1134 bm_space = sb_offset - array_size;
1135 sb->data_size = __cpu_to_le64(sb_offset - bm_space);
1136 break;
1137 case 1:
1138 sb->super_offset = __cpu_to_le64(0);
1139 reserved = bm_space + 4*2;
1140 /* Try for multiple of 1Meg so it is nicely aligned */
1141 #define ONE_MEG (2*1024)
1142 reserved = ((reserved + ONE_MEG-1)/ONE_MEG) * ONE_MEG;
1143 if (reserved + __le64_to_cpu(sb->size) > dsize)
1144 reserved = dsize - __le64_to_cpu(sb->size);
1145 /* force 4K alignment */
1146 reserved &= ~7ULL;
1147
1148 sb->data_offset = __cpu_to_le64(reserved);
1149 sb->data_size = __cpu_to_le64(dsize - reserved);
1150 break;
1151 case 2:
1152 sb_offset = 4*2;
1153 sb->super_offset = __cpu_to_le64(4*2);
1154 if (4*2 + 4*2 + bm_space + __le64_to_cpu(sb->size)
1155 > dsize)
1156 bm_space = dsize - __le64_to_cpu(sb->size)
1157 - 4*2 - 4*2;
1158
1159 reserved = bm_space + 4*2 + 4*2;
1160 /* Try for multiple of 1Meg so it is nicely aligned */
1161 #define ONE_MEG (2*1024)
1162 reserved = ((reserved + ONE_MEG-1)/ONE_MEG) * ONE_MEG;
1163 if (reserved + __le64_to_cpu(sb->size) > dsize)
1164 reserved = dsize - __le64_to_cpu(sb->size);
1165 /* force 4K alignment */
1166 reserved &= ~7ULL;
1167
1168 sb->data_offset = __cpu_to_le64(reserved);
1169 sb->data_size = __cpu_to_le64(dsize - reserved);
1170 break;
1171 default:
1172 return -EINVAL;
1173 }
1174
1175
1176 sb->sb_csum = calc_sb_1_csum(sb);
1177 rv = store_super1(st, di->fd);
1178 if (rv)
1179 fprintf(stderr,
1180 Name ": failed to write superblock to %s\n",
1181 di->devname);
1182
1183 if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1))
1184 rv = st->ss->write_bitmap(st, di->fd);
1185 close(di->fd);
1186 di->fd = -1;
1187 }
1188 return rv;
1189 }
1190 #endif
1191
1192 static int compare_super1(struct supertype *st, struct supertype *tst)
1193 {
1194 /*
1195 * return:
1196 * 0 same, or first was empty, and second was copied
1197 * 1 second had wrong number
1198 * 2 wrong uuid
1199 * 3 wrong other info
1200 */
1201 struct mdp_superblock_1 *first = st->sb;
1202 struct mdp_superblock_1 *second = tst->sb;
1203
1204 if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
1205 return 1;
1206 if (second->major_version != __cpu_to_le32(1))
1207 return 1;
1208
1209 if (!first) {
1210 if (posix_memalign((void**)&first, 512,
1211 1024 + 512 +
1212 sizeof(struct misc_dev_info)) != 0) {
1213 fprintf(stderr, Name
1214 ": %s could not allocate superblock\n", __func__);
1215 return 1;
1216 }
1217 memcpy(first, second, 1024 + 512 +
1218 sizeof(struct misc_dev_info));
1219 st->sb = first;
1220 return 0;
1221 }
1222 if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
1223 return 2;
1224
1225 if (first->ctime != second->ctime ||
1226 first->level != second->level ||
1227 first->layout != second->layout ||
1228 first->size != second->size ||
1229 first->chunksize != second->chunksize ||
1230 first->raid_disks != second->raid_disks)
1231 return 3;
1232 return 0;
1233 }
1234
1235 static int load_super1(struct supertype *st, int fd, char *devname)
1236 {
1237 unsigned long long dsize;
1238 unsigned long long sb_offset;
1239 struct mdp_superblock_1 *super;
1240 int uuid[4];
1241 struct bitmap_super_s *bsb;
1242 struct misc_dev_info *misc;
1243
1244 free_super1(st);
1245
1246 if (st->ss == NULL || st->minor_version == -1) {
1247 int bestvers = -1;
1248 struct supertype tst;
1249 __u64 bestctime = 0;
1250 /* guess... choose latest ctime */
1251 memset(&tst, 0, sizeof(tst));
1252 tst.ss = &super1;
1253 for (tst.minor_version = 0; tst.minor_version <= 2 ; tst.minor_version++) {
1254 switch(load_super1(&tst, fd, devname)) {
1255 case 0: super = tst.sb;
1256 if (bestvers == -1 ||
1257 bestctime < __le64_to_cpu(super->ctime)) {
1258 bestvers = tst.minor_version;
1259 bestctime = __le64_to_cpu(super->ctime);
1260 }
1261 free(super);
1262 tst.sb = NULL;
1263 break;
1264 case 1: return 1; /*bad device */
1265 case 2: break; /* bad, try next */
1266 }
1267 }
1268 if (bestvers != -1) {
1269 int rv;
1270 tst.minor_version = bestvers;
1271 tst.ss = &super1;
1272 tst.max_devs = 384;
1273 rv = load_super1(&tst, fd, devname);
1274 if (rv == 0)
1275 *st = tst;
1276 return rv;
1277 }
1278 return 2;
1279 }
1280 if (!get_dev_size(fd, devname, &dsize))
1281 return 1;
1282 dsize >>= 9;
1283
1284 if (dsize < 24) {
1285 if (devname)
1286 fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n",
1287 devname, dsize);
1288 return 1;
1289 }
1290
1291 /*
1292 * Calculate the position of the superblock.
1293 * It is always aligned to a 4K boundary and
1294 * depending on minor_version, it can be:
1295 * 0: At least 8K, but less than 12K, from end of device
1296 * 1: At start of device
1297 * 2: 4K from start of device.
1298 */
1299 switch(st->minor_version) {
1300 case 0:
1301 sb_offset = dsize;
1302 sb_offset -= 8*2;
1303 sb_offset &= ~(4*2-1);
1304 break;
1305 case 1:
1306 sb_offset = 0;
1307 break;
1308 case 2:
1309 sb_offset = 4*2;
1310 break;
1311 default:
1312 return -EINVAL;
1313 }
1314
1315 ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
1316
1317
1318 if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
1319 if (devname)
1320 fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
1321 devname, strerror(errno));
1322 return 1;
1323 }
1324
1325 if (posix_memalign((void**)&super, 512,
1326 1024 + 512 +
1327 sizeof(struct misc_dev_info)) != 0) {
1328 fprintf(stderr, Name ": %s could not allocate superblock\n",
1329 __func__);
1330 return 1;
1331 }
1332
1333 if (aread(fd, super, 1024) != 1024) {
1334 if (devname)
1335 fprintf(stderr, Name ": Cannot read superblock on %s\n",
1336 devname);
1337 free(super);
1338 return 1;
1339 }
1340
1341 if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) {
1342 if (devname)
1343 fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
1344 devname, MD_SB_MAGIC, __le32_to_cpu(super->magic));
1345 free(super);
1346 return 2;
1347 }
1348
1349 if (__le32_to_cpu(super->major_version) != 1) {
1350 if (devname)
1351 fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
1352 devname, __le32_to_cpu(super->major_version));
1353 free(super);
1354 return 2;
1355 }
1356 if (__le64_to_cpu(super->super_offset) != sb_offset) {
1357 if (devname)
1358 fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n",
1359 devname);
1360 free(super);
1361 return 2;
1362 }
1363 st->sb = super;
1364
1365 bsb = (struct bitmap_super_s *)(((char*)super)+1024);
1366
1367 misc = (struct misc_dev_info*) (((char*)super)+1024+512);
1368 misc->device_size = dsize;
1369
1370 /* Now check on the bitmap superblock */
1371 if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
1372 return 0;
1373 /* Read the bitmap superblock and make sure it looks
1374 * valid. If it doesn't clear the bit. An --assemble --force
1375 * should get that written out.
1376 */
1377 locate_bitmap1(st, fd);
1378 if (aread(fd, ((char*)super)+1024, 512)
1379 != 512)
1380 goto no_bitmap;
1381
1382 uuid_from_super1(st, uuid);
1383 if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
1384 memcmp(bsb->uuid, uuid, 16) != 0)
1385 goto no_bitmap;
1386 return 0;
1387
1388 no_bitmap:
1389 super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map)
1390 & ~MD_FEATURE_BITMAP_OFFSET);
1391 return 0;
1392 }
1393
1394
1395 static struct supertype *match_metadata_desc1(char *arg)
1396 {
1397 struct supertype *st = malloc(sizeof(*st));
1398 if (!st) return st;
1399
1400 memset(st, 0, sizeof(*st));
1401 st->container_dev = NoMdDev;
1402 st->ss = &super1;
1403 st->max_devs = 384;
1404 st->sb = NULL;
1405 /* leading zeros can be safely ignored. --detail generates them. */
1406 while (*arg == '0')
1407 arg++;
1408 if (strcmp(arg, "1.0") == 0 ||
1409 strcmp(arg, "1.00") == 0) {
1410 st->minor_version = 0;
1411 return st;
1412 }
1413 if (strcmp(arg, "1.1") == 0 ||
1414 strcmp(arg, "1.01") == 0
1415 ) {
1416 st->minor_version = 1;
1417 return st;
1418 }
1419 if (strcmp(arg, "1.2") == 0 ||
1420 #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
1421 strcmp(arg, "default") == 0 ||
1422 #endif /* DEFAULT_OLD_METADATA */
1423 strcmp(arg, "1.02") == 0) {
1424 st->minor_version = 2;
1425 return st;
1426 }
1427 if (strcmp(arg, "1") == 0 ||
1428 strcmp(arg, "default") == 0) {
1429 st->minor_version = -1;
1430 return st;
1431 }
1432
1433 free(st);
1434 return NULL;
1435 }
1436
1437 /* find available size on device with this devsize, using
1438 * superblock type st, and reserving 'reserve' sectors for
1439 * a possible bitmap
1440 */
1441 static __u64 avail_size1(struct supertype *st, __u64 devsize)
1442 {
1443 struct mdp_superblock_1 *super = st->sb;
1444 if (devsize < 24)
1445 return 0;
1446
1447 if (super == NULL)
1448 /* creating: allow suitable space for bitmap */
1449 devsize -= choose_bm_space(devsize);
1450 #ifndef MDASSEMBLE
1451 else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
1452 /* hot-add. allow for actual size of bitmap */
1453 struct bitmap_super_s *bsb;
1454 bsb = (struct bitmap_super_s *)(((char*)super)+1024);
1455 devsize -= bitmap_sectors(bsb);
1456 }
1457 #endif
1458
1459 if (st->minor_version < 0)
1460 /* not specified, so time to set default */
1461 st->minor_version = 2;
1462 if (super == NULL && st->minor_version > 0) {
1463 /* haven't committed to a size yet, so allow some
1464 * slack for alignment of data_offset.
1465 * We haven't access to device details so allow
1466 * 1 Meg if bigger than 1Gig
1467 */
1468 if (devsize > 1024*1024*2)
1469 devsize -= 1024*2;
1470 }
1471 switch(st->minor_version) {
1472 case 0:
1473 /* at end */
1474 return ((devsize - 8*2 ) & ~(4*2-1));
1475 case 1:
1476 /* at start, 4K for superblock and possible bitmap */
1477 return devsize - 4*2;
1478 case 2:
1479 /* 4k from start, 4K for superblock and possible bitmap */
1480 return devsize - (4+4)*2;
1481 }
1482 return 0;
1483 }
1484
1485 static int
1486 add_internal_bitmap1(struct supertype *st,
1487 int *chunkp, int delay, int write_behind,
1488 unsigned long long size,
1489 int may_change, int major)
1490 {
1491 /*
1492 * If not may_change, then this is a 'Grow' without sysfs support for
1493 * bitmaps, and the bitmap must fit after the superblock at 1K offset.
1494 * If may_change, then this is create or a Grow with sysfs syupport,
1495 * and we can put the bitmap wherever we like.
1496 *
1497 * size is in sectors, chunk is in bytes !!!
1498 */
1499
1500 unsigned long long bits;
1501 unsigned long long max_bits;
1502 unsigned long long min_chunk;
1503 long offset;
1504 unsigned long long chunk = *chunkp;
1505 int room = 0;
1506 int creating = 0;
1507 struct mdp_superblock_1 *sb = st->sb;
1508 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024);
1509 int uuid[4];
1510
1511 if (__le64_to_cpu(sb->data_size) == 0)
1512 /* Must be creating the array, else data_size would be non-zero */
1513 creating = 1;
1514 switch(st->minor_version) {
1515 case 0:
1516 /* either 3K after the superblock (when hot-add),
1517 * or some amount of space before.
1518 */
1519 if (creating) {
1520 /* We are creating array, so we *know* how much room has
1521 * been left.
1522 */
1523 offset = 0;
1524 room = choose_bm_space(__le64_to_cpu(sb->size));
1525 } else {
1526 room = __le64_to_cpu(sb->super_offset)
1527 - __le64_to_cpu(sb->data_offset)
1528 - __le64_to_cpu(sb->data_size);
1529
1530 if (!may_change || (room < 3*2 &&
1531 __le32_to_cpu(sb->max_dev) <= 384)) {
1532 room = 3*2;
1533 offset = 1*2;
1534 } else {
1535 offset = 0; /* means movable offset */
1536 }
1537 }
1538 break;
1539 case 1:
1540 case 2: /* between superblock and data */
1541 if (creating) {
1542 offset = 4*2;
1543 room = choose_bm_space(__le64_to_cpu(sb->size));
1544 } else {
1545 room = __le64_to_cpu(sb->data_offset)
1546 - __le64_to_cpu(sb->super_offset);
1547 if (!may_change) {
1548 room -= 2; /* Leave 1K for superblock */
1549 offset = 2;
1550 } else {
1551 room -= 4*2; /* leave 4K for superblock */
1552 offset = 4*2;
1553 }
1554 }
1555 break;
1556 default:
1557 return 0;
1558 }
1559
1560 if (chunk == UnSet && room > 128*2)
1561 /* Limit to 128K of bitmap when chunk size not requested */
1562 room = 128*2;
1563
1564 max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8;
1565
1566 min_chunk = 4096; /* sub-page chunks don't work yet.. */
1567 bits = (size*512)/min_chunk +1;
1568 while (bits > max_bits) {
1569 min_chunk *= 2;
1570 bits = (bits+1)/2;
1571 }
1572 if (chunk == UnSet) {
1573 /* For practical purpose, 64Meg is a good
1574 * default chunk size for internal bitmaps.
1575 */
1576 chunk = min_chunk;
1577 if (chunk < 64*1024*1024)
1578 chunk = 64*1024*1024;
1579 } else if (chunk < min_chunk)
1580 return 0; /* chunk size too small */
1581 if (chunk == 0) /* rounding problem */
1582 return 0;
1583
1584 if (offset == 0) {
1585 /* start bitmap on a 4K boundary with enough space for
1586 * the bitmap
1587 */
1588 bits = (size*512) / chunk + 1;
1589 room = ((bits+7)/8 + sizeof(bitmap_super_t) +4095)/4096;
1590 room *= 8; /* convert 4K blocks to sectors */
1591 offset = -room;
1592 }
1593
1594 sb->bitmap_offset = __cpu_to_le32(offset);
1595
1596 sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map)
1597 | MD_FEATURE_BITMAP_OFFSET);
1598 memset(bms, 0, sizeof(*bms));
1599 bms->magic = __cpu_to_le32(BITMAP_MAGIC);
1600 bms->version = __cpu_to_le32(major);
1601 uuid_from_super1(st, uuid);
1602 memcpy(bms->uuid, uuid, 16);
1603 bms->chunksize = __cpu_to_le32(chunk);
1604 bms->daemon_sleep = __cpu_to_le32(delay);
1605 bms->sync_size = __cpu_to_le64(size);
1606 bms->write_behind = __cpu_to_le32(write_behind);
1607
1608 *chunkp = chunk;
1609 return 1;
1610 }
1611
1612 static void locate_bitmap1(struct supertype *st, int fd)
1613 {
1614 unsigned long long offset;
1615 struct mdp_superblock_1 *sb;
1616 int mustfree = 0;
1617
1618 if (!st->sb) {
1619 if (st->ss->load_super(st, fd, NULL))
1620 return; /* no error I hope... */
1621 mustfree = 1;
1622 }
1623 sb = st->sb;
1624
1625 offset = __le64_to_cpu(sb->super_offset);
1626 offset += (int32_t) __le32_to_cpu(sb->bitmap_offset);
1627 if (mustfree)
1628 free(sb);
1629 lseek64(fd, offset<<9, 0);
1630 }
1631
1632 static int write_bitmap1(struct supertype *st, int fd)
1633 {
1634 struct mdp_superblock_1 *sb = st->sb;
1635 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024);
1636 int rv = 0;
1637
1638 int towrite, n;
1639 char buf[4096];
1640
1641 locate_bitmap1(st, fd);
1642
1643 memset(buf, 0xff, 4096);
1644 memcpy(buf, ((char*)sb)+1024, sizeof(bitmap_super_t));
1645
1646 towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
1647 towrite = (towrite+7) >> 3; /* bits to bytes */
1648 towrite += sizeof(bitmap_super_t);
1649 towrite = ROUND_UP(towrite, 512);
1650 while (towrite > 0) {
1651 n = towrite;
1652 if (n > 4096)
1653 n = 4096;
1654 n = awrite(fd, buf, n);
1655 if (n > 0)
1656 towrite -= n;
1657 else
1658 break;
1659 memset(buf, 0xff, 4096);
1660 }
1661 fsync(fd);
1662 if (towrite)
1663 rv = -2;
1664
1665 return rv;
1666 }
1667
1668 static void free_super1(struct supertype *st)
1669 {
1670 if (st->sb)
1671 free(st->sb);
1672 while (st->info) {
1673 struct devinfo *di = st->info;
1674 st->info = di->next;
1675 if (di->fd >= 0)
1676 close(di->fd);
1677 free(di);
1678 }
1679 st->sb = NULL;
1680 }
1681
1682 #ifndef MDASSEMBLE
1683 static int validate_geometry1(struct supertype *st, int level,
1684 int layout, int raiddisks,
1685 int *chunk, unsigned long long size,
1686 char *subdev, unsigned long long *freesize,
1687 int verbose)
1688 {
1689 unsigned long long ldsize;
1690 int fd;
1691
1692 if (level == LEVEL_CONTAINER) {
1693 if (verbose)
1694 fprintf(stderr, Name ": 1.x metadata does not support containers\n");
1695 return 0;
1696 }
1697 if (chunk && *chunk == UnSet)
1698 *chunk = DEFAULT_CHUNK;
1699
1700 if (!subdev)
1701 return 1;
1702
1703 fd = open(subdev, O_RDONLY|O_EXCL, 0);
1704 if (fd < 0) {
1705 if (verbose)
1706 fprintf(stderr, Name ": super1.x cannot open %s: %s\n",
1707 subdev, strerror(errno));
1708 return 0;
1709 }
1710
1711 if (!get_dev_size(fd, subdev, &ldsize)) {
1712 close(fd);
1713 return 0;
1714 }
1715 close(fd);
1716
1717 *freesize = avail_size1(st, ldsize >> 9);
1718 return 1;
1719 }
1720 #endif /* MDASSEMBLE */
1721
1722 struct superswitch super1 = {
1723 #ifndef MDASSEMBLE
1724 .examine_super = examine_super1,
1725 .brief_examine_super = brief_examine_super1,
1726 .export_examine_super = export_examine_super1,
1727 .detail_super = detail_super1,
1728 .brief_detail_super = brief_detail_super1,
1729 .export_detail_super = export_detail_super1,
1730 .write_init_super = write_init_super1,
1731 .validate_geometry = validate_geometry1,
1732 .add_to_super = add_to_super1,
1733 #endif
1734 .match_home = match_home1,
1735 .uuid_from_super = uuid_from_super1,
1736 .getinfo_super = getinfo_super1,
1737 .container_content = container_content1,
1738 .update_super = update_super1,
1739 .init_super = init_super1,
1740 .store_super = store_super1,
1741 .compare_super = compare_super1,
1742 .load_super = load_super1,
1743 .match_metadata_desc = match_metadata_desc1,
1744 .avail_size = avail_size1,
1745 .add_internal_bitmap = add_internal_bitmap1,
1746 .locate_bitmap = locate_bitmap1,
1747 .write_bitmap = write_bitmap1,
1748 .free_super = free_super1,
1749 #if __BYTE_ORDER == BIG_ENDIAN
1750 .swapuuid = 0,
1751 #else
1752 .swapuuid = 1,
1753 #endif
1754 .name = "1.x",
1755 };
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