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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 __u32 new_offset; /* signed number to add to data_offset in new
62 * layout. 0 == no-change. This can be
63 * different on each device in the array.
64 */
65
66 /* constant this-device information - 64 bytes */
67 __u64 data_offset; /* sector start of data, often 0 */
68 __u64 data_size; /* sectors in this device that can be used for data */
69 __u64 super_offset; /* sector start of this superblock */
70 __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */
71 __u32 dev_number; /* permanent identifier of this device - not role in raid */
72 __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
73 __u8 device_uuid[16]; /* user-space setable, ignored by kernel */
74 __u8 devflags; /* per-device flags. Only one defined...*/
75 #define WriteMostly1 1 /* mask for writemostly flag in above */
76 /* bad block log. If there are any bad blocks the feature flag is set.
77 * if offset and size are non-zero, that space is reserved and available.
78 */
79 __u8 bblog_shift; /* shift from sectors to block size for badblocklist */
80 __u16 bblog_size; /* number of sectors reserved for badblocklist */
81 __u32 bblog_offset; /* sector offset from superblock to bblog, signed */
82
83 /* array state information - 64 bytes */
84 __u64 utime; /* 40 bits second, 24 btes microseconds */
85 __u64 events; /* incremented when superblock updated */
86 __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */
87 __u32 sb_csum; /* checksum upto dev_roles[max_dev] */
88 __u32 max_dev; /* size of dev_roles[] array to consider */
89 __u8 pad3[64-32]; /* set to 0 when writing */
90
91 /* device state information. Indexed by dev_number.
92 * 2 bytes per device
93 * Note there are no per-device state flags. State information is rolled
94 * into the 'roles' value. If a device is spare or faulty, then it doesn't
95 * have a meaningful role.
96 */
97 __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
98 };
99
100 #define MAX_SB_SIZE 4096
101 /* bitmap super size is 256, but we round up to a sector for alignment */
102 #define BM_SUPER_SIZE 512
103 #define MAX_DEVS ((int)(MAX_SB_SIZE - sizeof(struct mdp_superblock_1)) / 2)
104 #define SUPER1_SIZE (MAX_SB_SIZE + BM_SUPER_SIZE \
105 + sizeof(struct misc_dev_info))
106
107 struct misc_dev_info {
108 __u64 device_size;
109 };
110
111 /* feature_map bits */
112 #define MD_FEATURE_BITMAP_OFFSET 1
113 #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
114 * must be honoured
115 */
116 #define MD_FEATURE_RESHAPE_ACTIVE 4
117 #define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */
118 #define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an
119 * active device with same 'role'.
120 * 'recovery_offset' is also set.
121 */
122 #define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number
123 * of devices, but is going
124 * backwards anyway.
125 */
126 #define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */
127 #define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \
128 |MD_FEATURE_RECOVERY_OFFSET \
129 |MD_FEATURE_RESHAPE_ACTIVE \
130 |MD_FEATURE_BAD_BLOCKS \
131 |MD_FEATURE_REPLACEMENT \
132 |MD_FEATURE_RESHAPE_BACKWARDS \
133 |MD_FEATURE_NEW_OFFSET \
134 )
135
136 #ifndef offsetof
137 #define offsetof(t,f) ((size_t)&(((t*)0)->f))
138 #endif
139 static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
140 {
141 unsigned int disk_csum, csum;
142 unsigned long long newcsum;
143 int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2;
144 unsigned int *isuper = (unsigned int*)sb;
145
146 /* make sure I can count... */
147 if (offsetof(struct mdp_superblock_1,data_offset) != 128 ||
148 offsetof(struct mdp_superblock_1, utime) != 192 ||
149 sizeof(struct mdp_superblock_1) != 256) {
150 fprintf(stderr, "WARNING - superblock isn't sized correctly\n");
151 }
152
153 disk_csum = sb->sb_csum;
154 sb->sb_csum = 0;
155 newcsum = 0;
156 for (; size>=4; size -= 4 ) {
157 newcsum += __le32_to_cpu(*isuper);
158 isuper++;
159 }
160
161 if (size == 2)
162 newcsum += __le16_to_cpu(*(unsigned short*) isuper);
163
164 csum = (newcsum & 0xffffffff) + (newcsum >> 32);
165 sb->sb_csum = disk_csum;
166 return __cpu_to_le32(csum);
167 }
168
169 /*
170 * Information related to file descriptor used for aligned reads/writes.
171 * Cache the block size.
172 */
173 struct align_fd {
174 int fd;
175 int blk_sz;
176 };
177
178 static void init_afd(struct align_fd *afd, int fd)
179 {
180 afd->fd = fd;
181
182 if (ioctl(afd->fd, BLKSSZGET, &afd->blk_sz) != 0)
183 afd->blk_sz = 512;
184 }
185
186 static char abuf[4096+4096];
187 static int aread(struct align_fd *afd, void *buf, int len)
188 {
189 /* aligned read.
190 * On devices with a 4K sector size, we need to read
191 * the full sector and copy relevant bits into
192 * the buffer
193 */
194 int bsize, iosize;
195 char *b;
196 int n;
197
198 bsize = afd->blk_sz;
199
200 if (!bsize || bsize > 4096 || len > 4096) {
201 if (!bsize)
202 fprintf(stderr, "WARNING - aread() called with "
203 "invalid block size\n");
204 return -1;
205 }
206 b = ROUND_UP_PTR((char *)abuf, 4096);
207
208 for (iosize = 0; iosize < len; iosize += bsize)
209 ;
210 n = read(afd->fd, b, iosize);
211 if (n <= 0)
212 return n;
213 lseek(afd->fd, len - n, 1);
214 if (n > len)
215 n = len;
216 memcpy(buf, b, n);
217 return n;
218 }
219
220 static int awrite(struct align_fd *afd, void *buf, int len)
221 {
222 /* aligned write.
223 * On devices with a 4K sector size, we need to write
224 * the full sector. We pre-read if the sector is larger
225 * than the write.
226 * The address must be sector-aligned.
227 */
228 int bsize, iosize;
229 char *b;
230 int n;
231
232 bsize = afd->blk_sz;
233 if (!bsize || bsize > 4096 || len > 4096) {
234 if (!bsize)
235 fprintf(stderr, "WARNING - awrite() called with "
236 "invalid block size\n");
237 return -1;
238 }
239 b = ROUND_UP_PTR((char *)abuf, 4096);
240
241 for (iosize = 0; iosize < len ; iosize += bsize)
242 ;
243
244 if (len != iosize) {
245 n = read(afd->fd, b, iosize);
246 if (n <= 0)
247 return n;
248 lseek(afd->fd, -n, 1);
249 }
250
251 memcpy(b, buf, len);
252 n = write(afd->fd, b, iosize);
253 if (n <= 0)
254 return n;
255 lseek(afd->fd, len - n, 1);
256 return len;
257 }
258
259 #ifndef MDASSEMBLE
260 static void examine_super1(struct supertype *st, char *homehost)
261 {
262 struct mdp_superblock_1 *sb = st->sb;
263 time_t atime;
264 unsigned int d;
265 int role;
266 int delta_extra = 0;
267 int i;
268 char *c;
269 int l = homehost ? strlen(homehost) : 0;
270 int layout;
271 unsigned long long sb_offset;
272
273 printf(" Magic : %08x\n", __le32_to_cpu(sb->magic));
274 printf(" Version : 1");
275 sb_offset = __le64_to_cpu(sb->super_offset);
276 if (sb_offset <= 4)
277 printf(".1\n");
278 else if (sb_offset <= 8)
279 printf(".2\n");
280 else
281 printf(".0\n");
282 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map));
283 printf(" Array UUID : ");
284 for (i=0; i<16; i++) {
285 if ((i&3)==0 && i != 0) printf(":");
286 printf("%02x", sb->set_uuid[i]);
287 }
288 printf("\n");
289 printf(" Name : %.32s", sb->set_name);
290 if (l > 0 && l < 32 &&
291 sb->set_name[l] == ':' &&
292 strncmp(sb->set_name, homehost, l) == 0)
293 printf(" (local to host %s)", homehost);
294 printf("\n");
295 atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL;
296 printf(" Creation Time : %.24s\n", ctime(&atime));
297 c=map_num(pers, __le32_to_cpu(sb->level));
298 printf(" Raid Level : %s\n", c?c:"-unknown-");
299 printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks));
300 printf("\n");
301 printf(" Avail Dev Size : %llu%s\n",
302 (unsigned long long)__le64_to_cpu(sb->data_size),
303 human_size(__le64_to_cpu(sb->data_size)<<9));
304 if (__le32_to_cpu(sb->level) > 0) {
305 int ddsks = 0, ddsks_denom = 1;
306 switch(__le32_to_cpu(sb->level)) {
307 case 1: ddsks=1;break;
308 case 4:
309 case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break;
310 case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break;
311 case 10:
312 layout = __le32_to_cpu(sb->layout);
313 ddsks = __le32_to_cpu(sb->raid_disks);
314 ddsks_denom = (layout&255) * ((layout>>8)&255);
315 }
316 if (ddsks) {
317 long long asize = __le64_to_cpu(sb->size);
318 asize = (asize << 9) * ddsks / ddsks_denom;
319 printf(" Array Size : %llu%s\n",
320 asize >> 10, human_size(asize));
321 }
322 if (sb->size != sb->data_size)
323 printf(" Used Dev Size : %llu%s\n",
324 (unsigned long long)__le64_to_cpu(sb->size),
325 human_size(__le64_to_cpu(sb->size)<<9));
326 }
327 if (sb->data_offset)
328 printf(" Data Offset : %llu sectors\n",
329 (unsigned long long)__le64_to_cpu(sb->data_offset));
330 if (sb->new_offset) {
331 unsigned long long offset = __le64_to_cpu(sb->data_offset);
332 offset += (signed)(int32_t)__le32_to_cpu(sb->new_offset);
333 printf(" New Offset : %llu sectors\n", offset);
334 }
335 printf(" Super Offset : %llu sectors\n",
336 (unsigned long long)__le64_to_cpu(sb->super_offset));
337 if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)
338 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset));
339 printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
340 printf(" Device UUID : ");
341 for (i=0; i<16; i++) {
342 if ((i&3)==0 && i != 0) printf(":");
343 printf("%02x", sb->device_uuid[i]);
344 }
345 printf("\n");
346 printf("\n");
347 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
348 printf("Internal Bitmap : %ld sectors from superblock\n",
349 (long)(int32_t)__le32_to_cpu(sb->bitmap_offset));
350 }
351 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE)) {
352 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2,
353 human_size(__le64_to_cpu(sb->reshape_position)<<9));
354 if (__le32_to_cpu(sb->delta_disks)) {
355 printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks));
356 printf(" (%d->%d)\n",
357 __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks),
358 __le32_to_cpu(sb->raid_disks));
359 if ((int)__le32_to_cpu(sb->delta_disks) < 0)
360 delta_extra = -__le32_to_cpu(sb->delta_disks);
361 }
362 if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) {
363 c = map_num(pers, __le32_to_cpu(sb->new_level));
364 printf(" New Level : %s\n", c?c:"-unknown-");
365 }
366 if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) {
367 if (__le32_to_cpu(sb->level) == 5) {
368 c = map_num(r5layout, __le32_to_cpu(sb->new_layout));
369 printf(" New Layout : %s\n", c?c:"-unknown-");
370 }
371 if (__le32_to_cpu(sb->level) == 6) {
372 c = map_num(r6layout, __le32_to_cpu(sb->new_layout));
373 printf(" New Layout : %s\n", c?c:"-unknown-");
374 }
375 if (__le32_to_cpu(sb->level) == 10) {
376 printf(" New Layout :");
377 print_r10_layout(__le32_to_cpu(sb->new_layout));
378 printf("\n");
379 }
380 }
381 if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize))
382 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2);
383 printf("\n");
384 }
385 if (sb->devflags) {
386 printf(" Flags :");
387 if (sb->devflags & WriteMostly1)
388 printf(" write-mostly");
389 printf("\n");
390 }
391
392 atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL;
393 printf(" Update Time : %.24s\n", ctime(&atime));
394
395 if (sb->bblog_size && sb->bblog_offset) {
396 printf(" Bad Block Log : %d entries available at offset %ld sectors",
397 __le16_to_cpu(sb->bblog_size)*512/8,
398 (long)__le32_to_cpu(sb->bblog_offset));
399 if (sb->feature_map &
400 __cpu_to_le32(MD_FEATURE_BAD_BLOCKS))
401 printf(" - bad blocks present.");
402 printf("\n");
403 }
404
405
406 if (calc_sb_1_csum(sb) == sb->sb_csum)
407 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum));
408 else
409 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum),
410 __le32_to_cpu(calc_sb_1_csum(sb)));
411 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events));
412 printf("\n");
413 if (__le32_to_cpu(sb->level) == 5) {
414 c = map_num(r5layout, __le32_to_cpu(sb->layout));
415 printf(" Layout : %s\n", c?c:"-unknown-");
416 }
417 if (__le32_to_cpu(sb->level) == 6) {
418 c = map_num(r6layout, __le32_to_cpu(sb->layout));
419 printf(" Layout : %s\n", c?c:"-unknown-");
420 }
421 if (__le32_to_cpu(sb->level) == 10) {
422 int lo = __le32_to_cpu(sb->layout);
423 printf(" Layout :");
424 print_r10_layout(lo);
425 printf("\n");
426 }
427 switch(__le32_to_cpu(sb->level)) {
428 case 0:
429 case 4:
430 case 5:
431 case 6:
432 case 10:
433 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2);
434 break;
435 case -1:
436 printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2);
437 break;
438 default: break;
439 }
440 printf("\n");
441 #if 0
442 /* This turns out to just be confusing */
443 printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number));
444 for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--)
445 if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff)
446 break;
447 for (d=0; d < i; d++) {
448 int role = __le16_to_cpu(sb->dev_roles[d]);
449 if (d) printf(", ");
450 if (role == 0xffff) printf("empty");
451 else if(role == 0xfffe) printf("failed");
452 else printf("%d", role);
453 }
454 printf(")\n");
455 #endif
456 printf(" Device Role : ");
457 d = __le32_to_cpu(sb->dev_number);
458 if (d < __le32_to_cpu(sb->max_dev))
459 role = __le16_to_cpu(sb->dev_roles[d]);
460 else
461 role = 0xFFFF;
462 if (role >= 0xFFFE)
463 printf("spare\n");
464 else if (sb->feature_map & __cpu_to_le32(MD_FEATURE_REPLACEMENT))
465 printf("Replacement device %d\n", role);
466 else
467 printf("Active device %d\n", role);
468
469 printf(" Array State : ");
470 for (d=0; d<__le32_to_cpu(sb->raid_disks) + delta_extra; d++) {
471 int cnt = 0;
472 unsigned int i;
473 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
474 unsigned int role = __le16_to_cpu(sb->dev_roles[i]);
475 if (role == d)
476 cnt++;
477 }
478 if (cnt == 2)
479 printf("R");
480 else if (cnt == 1)
481 printf("A");
482 else if (cnt == 0)
483 printf(".");
484 else
485 printf("?");
486 }
487 #if 0
488 /* This is confusing too */
489 faulty = 0;
490 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
491 int role = __le16_to_cpu(sb->dev_roles[i]);
492 if (role == 0xFFFE)
493 faulty++;
494 }
495 if (faulty) printf(" %d failed", faulty);
496 #endif
497 printf(" ('A' == active, '.' == missing, 'R' == replacing)");
498 printf("\n");
499 }
500
501
502 static void brief_examine_super1(struct supertype *st, int verbose)
503 {
504 struct mdp_superblock_1 *sb = st->sb;
505 int i;
506 unsigned long long sb_offset;
507 char *nm;
508 char *c=map_num(pers, __le32_to_cpu(sb->level));
509
510 nm = strchr(sb->set_name, ':');
511 if (nm)
512 nm++;
513 else if (sb->set_name[0])
514 nm = sb->set_name;
515 else
516 nm = NULL;
517
518 printf("ARRAY ");
519 if (nm) {
520 printf("/dev/md/");
521 print_escape(nm);
522 putchar(' ');
523 }
524 if (verbose && c)
525 printf(" level=%s", c);
526 sb_offset = __le64_to_cpu(sb->super_offset);
527 if (sb_offset <= 4)
528 printf(" metadata=1.1 ");
529 else if (sb_offset <= 8)
530 printf(" metadata=1.2 ");
531 else
532 printf(" metadata=1.0 ");
533 if (verbose)
534 printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks));
535 printf("UUID=");
536 for (i=0; i<16; i++) {
537 if ((i&3)==0 && i != 0) printf(":");
538 printf("%02x", sb->set_uuid[i]);
539 }
540 if (sb->set_name[0]) {
541 printf(" name=");
542 print_quoted(sb->set_name);
543 }
544 printf("\n");
545 }
546
547 static void export_examine_super1(struct supertype *st)
548 {
549 struct mdp_superblock_1 *sb = st->sb;
550 int i;
551 int len = 32;
552 int layout;
553
554 printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level)));
555 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks));
556 for (i=0; i<32; i++)
557 if (sb->set_name[i] == '\n' ||
558 sb->set_name[i] == '\0') {
559 len = i;
560 break;
561 }
562 if (len)
563 printf("MD_NAME=%.*s\n", len, sb->set_name);
564 if (__le32_to_cpu(sb->level) > 0) {
565 int ddsks = 0, ddsks_denom = 1;
566 switch(__le32_to_cpu(sb->level)) {
567 case 1: ddsks=1;break;
568 case 4:
569 case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break;
570 case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break;
571 case 10:
572 layout = __le32_to_cpu(sb->layout);
573 ddsks = __le32_to_cpu(sb->raid_disks);
574 ddsks_denom = (layout&255) * ((layout>>8)&255);
575 }
576 if (ddsks) {
577 long long asize = __le64_to_cpu(sb->size);
578 asize = (asize << 9) * ddsks / ddsks_denom;
579 printf("MD_ARRAY_SIZE=%s\n",human_size_brief(asize,JEDEC));
580 }
581 }
582 printf("MD_UUID=");
583 for (i=0; i<16; i++) {
584 if ((i&3)==0 && i != 0) printf(":");
585 printf("%02x", sb->set_uuid[i]);
586 }
587 printf("\n");
588 printf("MD_UPDATE_TIME=%llu\n",
589 __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL);
590 printf("MD_DEV_UUID=");
591 for (i=0; i<16; i++) {
592 if ((i&3)==0 && i != 0) printf(":");
593 printf("%02x", sb->device_uuid[i]);
594 }
595 printf("\n");
596 printf("MD_EVENTS=%llu\n",
597 (unsigned long long)__le64_to_cpu(sb->events));
598 }
599
600 static void detail_super1(struct supertype *st, char *homehost)
601 {
602 struct mdp_superblock_1 *sb = st->sb;
603 int i;
604 int l = homehost ? strlen(homehost) : 0;
605
606 printf(" Name : %.32s", sb->set_name);
607 if (l > 0 && l < 32 &&
608 sb->set_name[l] == ':' &&
609 strncmp(sb->set_name, homehost, l) == 0)
610 printf(" (local to host %s)", homehost);
611 printf("\n UUID : ");
612 for (i=0; i<16; i++) {
613 if ((i&3)==0 && i != 0) printf(":");
614 printf("%02x", sb->set_uuid[i]);
615 }
616 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events));
617 }
618
619 static void brief_detail_super1(struct supertype *st)
620 {
621 struct mdp_superblock_1 *sb = st->sb;
622 int i;
623
624 if (sb->set_name[0]) {
625 printf(" name=");
626 print_quoted(sb->set_name);
627 }
628 printf(" UUID=");
629 for (i=0; i<16; i++) {
630 if ((i&3)==0 && i != 0) printf(":");
631 printf("%02x", sb->set_uuid[i]);
632 }
633 }
634
635 static void export_detail_super1(struct supertype *st)
636 {
637 struct mdp_superblock_1 *sb = st->sb;
638 int i;
639 int len = 32;
640
641 for (i=0; i<32; i++)
642 if (sb->set_name[i] == '\n' ||
643 sb->set_name[i] == '\0') {
644 len = i;
645 break;
646 }
647 if (len)
648 printf("MD_NAME=%.*s\n", len, sb->set_name);
649 }
650
651 static int examine_badblocks_super1(struct supertype *st, int fd, char *devname)
652 {
653 struct mdp_superblock_1 *sb = st->sb;
654 unsigned long long offset;
655 int size;
656 __u64 *bbl, *bbp;
657 int i;
658
659 if (!sb->bblog_size || __le32_to_cpu(sb->bblog_size) > 100
660 || !sb->bblog_offset){
661 printf("No bad-blocks list configured on %s\n", devname);
662 return 0;
663 }
664 if ((sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS))
665 == 0) {
666 printf("Bad-blocks list is empty in %s\n", devname);
667 return 0;
668 }
669
670 size = __le32_to_cpu(sb->bblog_size)* 512;
671 posix_memalign((void**)&bbl, 4096, size);
672 offset = __le64_to_cpu(sb->super_offset) +
673 (int)__le32_to_cpu(sb->bblog_offset);
674 offset <<= 9;
675 if (lseek64(fd, offset, 0) < 0) {
676 pr_err("Cannot seek to bad-blocks list\n");
677 return 1;
678 }
679 if (read(fd, bbl, size) != size) {
680 pr_err("Cannot read bad-blocks list\n");
681 return 1;
682 }
683 /* 64bits per entry. 10 bits is block-count, 54 bits is block
684 * offset. Blocks are sectors unless bblog->shift makes them bigger
685 */
686 bbp = (__u64*)bbl;
687 printf("Bad-blocks on %s:\n", devname);
688 for (i = 0; i < size/8; i++, bbp++) {
689 __u64 bb = __le64_to_cpu(*bbp);
690 int count = bb & 0x3ff;
691 unsigned long long sector = bb >> 10;
692
693 if (bb + 1 == 0)
694 break;
695
696 sector <<= sb->bblog_shift;
697 count <<= sb->bblog_shift;
698
699 printf("%20llu for %d sectors\n", sector, count);
700 }
701 return 0;
702 }
703
704 #endif
705
706 static int match_home1(struct supertype *st, char *homehost)
707 {
708 struct mdp_superblock_1 *sb = st->sb;
709 int l = homehost ? strlen(homehost) : 0;
710
711 return (l > 0 && l < 32 &&
712 sb->set_name[l] == ':' &&
713 strncmp(sb->set_name, homehost, l) == 0);
714 }
715
716 static void uuid_from_super1(struct supertype *st, int uuid[4])
717 {
718 struct mdp_superblock_1 *super = st->sb;
719 char *cuuid = (char*)uuid;
720 int i;
721 for (i=0; i<16; i++)
722 cuuid[i] = super->set_uuid[i];
723 }
724
725 static void getinfo_super1(struct supertype *st, struct mdinfo *info, char *map)
726 {
727 struct mdp_superblock_1 *sb = st->sb;
728 struct bitmap_super_s *bsb = (void*)(((char*)sb)+MAX_SB_SIZE);
729 struct misc_dev_info *misc = (void*)(((char*)sb)+MAX_SB_SIZE+BM_SUPER_SIZE);
730 int working = 0;
731 unsigned int i;
732 unsigned int role;
733 unsigned int map_disks = info->array.raid_disks;
734 unsigned long long super_offset;
735 unsigned long long data_size;
736
737 memset(info, 0, sizeof(*info));
738 info->array.major_version = 1;
739 info->array.minor_version = st->minor_version;
740 info->array.patch_version = 0;
741 info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
742 info->array.level = __le32_to_cpu(sb->level);
743 info->array.layout = __le32_to_cpu(sb->layout);
744 info->array.md_minor = -1;
745 info->array.ctime = __le64_to_cpu(sb->ctime);
746 info->array.utime = __le64_to_cpu(sb->utime);
747 info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
748 info->array.state =
749 (__le64_to_cpu(sb->resync_offset) == MaxSector)
750 ? 1 : 0;
751
752 info->data_offset = __le64_to_cpu(sb->data_offset);
753 info->component_size = __le64_to_cpu(sb->size);
754 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET))
755 info->bitmap_offset = (int32_t)__le32_to_cpu(sb->bitmap_offset);
756
757 info->disk.major = 0;
758 info->disk.minor = 0;
759 info->disk.number = __le32_to_cpu(sb->dev_number);
760 if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
761 __le32_to_cpu(sb->dev_number) >= MAX_DEVS)
762 role = 0xfffe;
763 else
764 role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
765
766 super_offset = __le64_to_cpu(sb->super_offset);
767 data_size = __le64_to_cpu(sb->size);
768 if (info->data_offset < super_offset) {
769 unsigned long long end;
770 info->space_before = info->data_offset;
771 end = super_offset;
772 if (info->bitmap_offset < 0)
773 end += info->bitmap_offset;
774 if (info->data_offset + data_size < end)
775 info->space_after = end - data_size - info->data_offset;
776 else
777 info->space_after = 0;
778 } else {
779 info->space_before = (info->data_offset -
780 super_offset);
781 if (info->bitmap_offset > 0) {
782 unsigned long long bmend = info->bitmap_offset;
783 unsigned long long size = __le64_to_cpu(bsb->sync_size);
784 size /= __le32_to_cpu(bsb->chunksize) >> 9;
785 size = (size + 7) >> 3;
786 size += sizeof(bitmap_super_t);
787 size = ROUND_UP(size, 4096);
788 size /= 512;
789 size += bmend;
790 if (size < info->space_before)
791 info->space_before -= size;
792 else
793 info->space_before = 0;
794 } else
795 info->space_before -= 8; /* superblock */
796 info->space_after = misc->device_size - data_size - info->data_offset;
797 }
798
799 info->disk.raid_disk = -1;
800 switch(role) {
801 case 0xFFFF:
802 info->disk.state = 0; /* spare: not active, not sync, not faulty */
803 break;
804 case 0xFFFE:
805 info->disk.state = 1; /* faulty */
806 break;
807 default:
808 info->disk.state = 6; /* active and in sync */
809 info->disk.raid_disk = role;
810 }
811 if (sb->devflags & WriteMostly1)
812 info->disk.state |= (1 << MD_DISK_WRITEMOSTLY);
813 info->events = __le64_to_cpu(sb->events);
814 sprintf(info->text_version, "1.%d", st->minor_version);
815 info->safe_mode_delay = 200;
816
817 memcpy(info->uuid, sb->set_uuid, 16);
818
819 strncpy(info->name, sb->set_name, 32);
820 info->name[32] = 0;
821
822 if ((__le32_to_cpu(sb->feature_map)&MD_FEATURE_REPLACEMENT)) {
823 info->disk.state &= ~(1 << MD_DISK_SYNC);
824 info->disk.state |= 1 << MD_DISK_REPLACEMENT;
825 }
826
827
828 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET))
829 info->recovery_start = __le32_to_cpu(sb->recovery_offset);
830 else
831 info->recovery_start = MaxSector;
832
833 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
834 info->reshape_active = 1;
835 if (info->array.level == 10)
836 info->reshape_active |= RESHAPE_NO_BACKUP;
837 info->reshape_progress = __le64_to_cpu(sb->reshape_position);
838 info->new_level = __le32_to_cpu(sb->new_level);
839 info->delta_disks = __le32_to_cpu(sb->delta_disks);
840 info->new_layout = __le32_to_cpu(sb->new_layout);
841 info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
842 if (info->delta_disks < 0)
843 info->array.raid_disks -= info->delta_disks;
844 } else
845 info->reshape_active = 0;
846
847 info->recovery_blocked = info->reshape_active;
848
849 if (map)
850 for (i=0; i<map_disks; i++)
851 map[i] = 0;
852 for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) {
853 role = __le16_to_cpu(sb->dev_roles[i]);
854 if (/*role == 0xFFFF || */role < (unsigned) info->array.raid_disks) {
855 working++;
856 if (map && role < map_disks)
857 map[role] = 1;
858 }
859 }
860
861 info->array.working_disks = working;
862 }
863
864 static struct mdinfo *container_content1(struct supertype *st, char *subarray)
865 {
866 struct mdinfo *info;
867
868 if (subarray)
869 return NULL;
870
871 info = xmalloc(sizeof(*info));
872 getinfo_super1(st, info, NULL);
873 return info;
874 }
875
876 static int update_super1(struct supertype *st, struct mdinfo *info,
877 char *update,
878 char *devname, int verbose,
879 int uuid_set, char *homehost)
880 {
881 /* NOTE: for 'assemble' and 'force' we need to return non-zero
882 * if any change was made. For others, the return value is
883 * ignored.
884 */
885 int rv = 0;
886 struct mdp_superblock_1 *sb = st->sb;
887
888 if (strcmp(update, "homehost") == 0 &&
889 homehost) {
890 /* Note that 'homehost' is special as it is really
891 * a "name" update.
892 */
893 char *c;
894 update = "name";
895 c = strchr(sb->set_name, ':');
896 if (c)
897 strncpy(info->name, c+1, 31 - (c-sb->set_name));
898 else
899 strncpy(info->name, sb->set_name, 32);
900 info->name[32] = 0;
901 }
902
903 if (strcmp(update, "force-one")==0) {
904 /* Not enough devices for a working array,
905 * so bring this one up-to-date
906 */
907 if (sb->events != __cpu_to_le64(info->events))
908 rv = 1;
909 sb->events = __cpu_to_le64(info->events);
910 } else if (strcmp(update, "force-array")==0) {
911 /* Degraded array and 'force' requests to
912 * maybe need to mark it 'clean'.
913 */
914 switch(__le32_to_cpu(sb->level)) {
915 case 5: case 4: case 6:
916 /* need to force clean */
917 if (sb->resync_offset != MaxSector)
918 rv = 1;
919 sb->resync_offset = MaxSector;
920 }
921 } else if (strcmp(update, "assemble")==0) {
922 int d = info->disk.number;
923 int want;
924 if (info->disk.state & (1<<MD_DISK_ACTIVE))
925 want = info->disk.raid_disk;
926 else
927 want = 0xFFFF;
928 if (sb->dev_roles[d] != __cpu_to_le16(want)) {
929 sb->dev_roles[d] = __cpu_to_le16(want);
930 rv = 1;
931 }
932 if (info->reshape_active &&
933 sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) &&
934 info->delta_disks >= 0 &&
935 info->reshape_progress < __le64_to_cpu(sb->reshape_position)) {
936 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
937 rv = 1;
938 }
939 if (info->reshape_active &&
940 sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) &&
941 info->delta_disks < 0 &&
942 info->reshape_progress > __le64_to_cpu(sb->reshape_position)) {
943 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
944 rv = 1;
945 }
946 } else if (strcmp(update, "linear-grow-new") == 0) {
947 unsigned int i;
948 int rfd, fd;
949 unsigned int max = __le32_to_cpu(sb->max_dev);
950
951 for (i=0 ; i < max ; i++)
952 if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe)
953 break;
954 sb->dev_number = __cpu_to_le32(i);
955 info->disk.number = i;
956 if (max >= __le32_to_cpu(sb->max_dev))
957 sb->max_dev = __cpu_to_le32(max+1);
958
959 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
960 read(rfd, sb->device_uuid, 16) != 16) {
961 __u32 r[4] = {random(), random(), random(), random()};
962 memcpy(sb->device_uuid, r, 16);
963 }
964 if (rfd >= 0)
965 close(rfd);
966
967 sb->dev_roles[i] =
968 __cpu_to_le16(info->disk.raid_disk);
969
970 fd = open(devname, O_RDONLY);
971 if (fd >= 0) {
972 unsigned long long ds;
973 get_dev_size(fd, devname, &ds);
974 close(fd);
975 ds >>= 9;
976 if (__le64_to_cpu(sb->super_offset) <
977 __le64_to_cpu(sb->data_offset)) {
978 sb->data_size = __cpu_to_le64(
979 ds - __le64_to_cpu(sb->data_offset));
980 } else {
981 ds -= 8*2;
982 ds &= ~(unsigned long long)(4*2-1);
983 sb->super_offset = __cpu_to_le64(ds);
984 sb->data_size = __cpu_to_le64(
985 ds - __le64_to_cpu(sb->data_offset));
986 }
987 }
988 } else if (strcmp(update, "linear-grow-update") == 0) {
989 sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
990 sb->dev_roles[info->disk.number] =
991 __cpu_to_le16(info->disk.raid_disk);
992 } else if (strcmp(update, "resync") == 0) {
993 /* make sure resync happens */
994 sb->resync_offset = 0ULL;
995 } else if (strcmp(update, "uuid") == 0) {
996 copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
997
998 if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
999 struct bitmap_super_s *bm;
1000 bm = (struct bitmap_super_s*)(st->sb+MAX_SB_SIZE);
1001 memcpy(bm->uuid, sb->set_uuid, 16);
1002 }
1003 } else if (strcmp(update, "no-bitmap") == 0) {
1004 sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);
1005 } else if (strcmp(update, "bbl") == 0) {
1006 /* only possible if there is room after the bitmap, or if
1007 * there is no bitmap
1008 */
1009 unsigned long long sb_offset = __le64_to_cpu(sb->super_offset);
1010 unsigned long long data_offset = __le64_to_cpu(sb->data_offset);
1011 long bitmap_offset = (long)__le64_to_cpu(sb->bitmap_offset);
1012 long bm_sectors = 0;
1013 long space;
1014
1015 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
1016 struct bitmap_super_s *bsb;
1017 bsb = (struct bitmap_super_s *)(((char*)sb)+MAX_SB_SIZE);
1018 bm_sectors = bitmap_sectors(bsb);
1019 }
1020
1021 if (sb_offset < data_offset) {
1022 /* 1.1 or 1.2. Put bbl just before data
1023 */
1024 long bb_offset;
1025 space = data_offset - sb_offset;
1026 bb_offset = space - 8;
1027 if (bm_sectors && bitmap_offset > 0)
1028 space -= (bitmap_offset + bm_sectors);
1029 else
1030 space -= 8; /* The superblock */
1031 if (space >= 8) {
1032 sb->bblog_size = __cpu_to_le16(8);
1033 sb->bblog_offset = __cpu_to_le32(bb_offset);
1034 }
1035 } else {
1036 /* 1.0 - Put bbl just before super block */
1037 if (bm_sectors && bitmap_offset < 0)
1038 space = -bitmap_offset - bm_sectors;
1039 else
1040 space = sb_offset - data_offset -
1041 __le64_to_cpu(sb->data_size);
1042 if (space >= 8) {
1043 sb->bblog_size = __cpu_to_le16(8);
1044 sb->bblog_offset = __cpu_to_le32((unsigned)-8);
1045 }
1046 }
1047 } else if (strcmp(update, "no-bbl") == 0) {
1048 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS))
1049 pr_err("Cannot remove active bbl from %s\n",devname);
1050 else {
1051 sb->bblog_size = 0;
1052 sb->bblog_shift = 0;
1053 sb->bblog_offset = 0;
1054 }
1055 } else if (strcmp(update, "name") == 0) {
1056 if (info->name[0] == 0)
1057 sprintf(info->name, "%d", info->array.md_minor);
1058 memset(sb->set_name, 0, sizeof(sb->set_name));
1059 if (homehost &&
1060 strchr(info->name, ':') == NULL &&
1061 strlen(homehost)+1+strlen(info->name) < 32) {
1062 strcpy(sb->set_name, homehost);
1063 strcat(sb->set_name, ":");
1064 strcat(sb->set_name, info->name);
1065 } else
1066 strcpy(sb->set_name, info->name);
1067 } else if (strcmp(update, "devicesize") == 0 &&
1068 __le64_to_cpu(sb->super_offset) <
1069 __le64_to_cpu(sb->data_offset)) {
1070 /* set data_size to device size less data_offset */
1071 struct misc_dev_info *misc = (struct misc_dev_info*)
1072 (st->sb + MAX_SB_SIZE + BM_SUPER_SIZE);
1073 printf("Size was %llu\n", (unsigned long long)
1074 __le64_to_cpu(sb->data_size));
1075 sb->data_size = __cpu_to_le64(
1076 misc->device_size - __le64_to_cpu(sb->data_offset));
1077 printf("Size is %llu\n", (unsigned long long)
1078 __le64_to_cpu(sb->data_size));
1079 } else if (strcmp(update, "_reshape_progress")==0)
1080 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
1081 else if (strcmp(update, "writemostly")==0)
1082 sb->devflags |= WriteMostly1;
1083 else if (strcmp(update, "readwrite")==0)
1084 sb->devflags &= ~WriteMostly1;
1085 else
1086 rv = -1;
1087
1088 sb->sb_csum = calc_sb_1_csum(sb);
1089 return rv;
1090 }
1091
1092 static int init_super1(struct supertype *st, mdu_array_info_t *info,
1093 unsigned long long size, char *name, char *homehost,
1094 int *uuid, unsigned long long data_offset)
1095 {
1096 struct mdp_superblock_1 *sb;
1097 int spares;
1098 int rfd;
1099 char defname[10];
1100 int sbsize;
1101
1102 if (posix_memalign((void**)&sb, 4096, SUPER1_SIZE) != 0) {
1103 pr_err("%s could not allocate superblock\n", __func__);
1104 return 0;
1105 }
1106 memset(sb, 0, SUPER1_SIZE);
1107
1108 st->sb = sb;
1109 if (info == NULL) {
1110 /* zeroing superblock */
1111 return 0;
1112 }
1113
1114 spares = info->working_disks - info->active_disks;
1115 if (info->raid_disks + spares > MAX_DEVS) {
1116 pr_err("too many devices requested: %d+%d > %d\n",
1117 info->raid_disks , spares, MAX_DEVS);
1118 return 0;
1119 }
1120
1121 sb->magic = __cpu_to_le32(MD_SB_MAGIC);
1122 sb->major_version = __cpu_to_le32(1);
1123 sb->feature_map = 0;
1124 sb->pad0 = 0;
1125
1126 if (uuid)
1127 copy_uuid(sb->set_uuid, uuid, super1.swapuuid);
1128 else {
1129 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
1130 read(rfd, sb->set_uuid, 16) != 16) {
1131 __u32 r[4] = {random(), random(), random(), random()};
1132 memcpy(sb->set_uuid, r, 16);
1133 }
1134 if (rfd >= 0) close(rfd);
1135 }
1136
1137 if (name == NULL || *name == 0) {
1138 sprintf(defname, "%d", info->md_minor);
1139 name = defname;
1140 }
1141 if (homehost &&
1142 strchr(name, ':')== NULL &&
1143 strlen(homehost)+1+strlen(name) < 32) {
1144 strcpy(sb->set_name, homehost);
1145 strcat(sb->set_name, ":");
1146 strcat(sb->set_name, name);
1147 } else
1148 strcpy(sb->set_name, name);
1149
1150 sb->ctime = __cpu_to_le64((unsigned long long)time(0));
1151 sb->level = __cpu_to_le32(info->level);
1152 sb->layout = __cpu_to_le32(info->layout);
1153 sb->size = __cpu_to_le64(size*2ULL);
1154 sb->chunksize = __cpu_to_le32(info->chunk_size>>9);
1155 sb->raid_disks = __cpu_to_le32(info->raid_disks);
1156
1157 sb->data_offset = __cpu_to_le64(data_offset);
1158 sb->data_size = __cpu_to_le64(0);
1159 sb->super_offset = __cpu_to_le64(0);
1160 sb->recovery_offset = __cpu_to_le64(0);
1161
1162 sb->utime = sb->ctime;
1163 sb->events = __cpu_to_le64(1);
1164 if (info->state & (1<<MD_SB_CLEAN))
1165 sb->resync_offset = MaxSector;
1166 else
1167 sb->resync_offset = 0;
1168 sbsize = sizeof(struct mdp_superblock_1) + 2 * (info->raid_disks + spares);
1169 sbsize = ROUND_UP(sbsize, 512);
1170 sb->max_dev = __cpu_to_le32((sbsize - sizeof(struct mdp_superblock_1)) / 2);
1171
1172 memset(sb->dev_roles, 0xff, MAX_SB_SIZE - sizeof(struct mdp_superblock_1));
1173
1174 return 1;
1175 }
1176
1177 struct devinfo {
1178 int fd;
1179 char *devname;
1180 long long data_offset;
1181 mdu_disk_info_t disk;
1182 struct devinfo *next;
1183 };
1184 #ifndef MDASSEMBLE
1185 /* Add a device to the superblock being created */
1186 static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk,
1187 int fd, char *devname, unsigned long long data_offset)
1188 {
1189 struct mdp_superblock_1 *sb = st->sb;
1190 __u16 *rp = sb->dev_roles + dk->number;
1191 struct devinfo *di, **dip;
1192
1193 if ((dk->state & 6) == 6) /* active, sync */
1194 *rp = __cpu_to_le16(dk->raid_disk);
1195 else if ((dk->state & ~2) == 0) /* active or idle -> spare */
1196 *rp = 0xffff;
1197 else
1198 *rp = 0xfffe;
1199
1200 if (dk->number >= (int)__le32_to_cpu(sb->max_dev) &&
1201 __le32_to_cpu(sb->max_dev) < MAX_DEVS)
1202 sb->max_dev = __cpu_to_le32(dk->number+1);
1203
1204 sb->dev_number = __cpu_to_le32(dk->number);
1205 sb->devflags = 0; /* don't copy another disks flags */
1206 sb->sb_csum = calc_sb_1_csum(sb);
1207
1208 dip = (struct devinfo **)&st->info;
1209 while (*dip)
1210 dip = &(*dip)->next;
1211 di = xmalloc(sizeof(struct devinfo));
1212 di->fd = fd;
1213 di->devname = devname;
1214 di->disk = *dk;
1215 di->data_offset = data_offset;
1216 di->next = NULL;
1217 *dip = di;
1218
1219 return 0;
1220 }
1221 #endif
1222
1223 static void locate_bitmap1(struct supertype *st, int fd);
1224
1225 static int store_super1(struct supertype *st, int fd)
1226 {
1227 struct mdp_superblock_1 *sb = st->sb;
1228 unsigned long long sb_offset;
1229 struct align_fd afd;
1230 int sbsize;
1231 unsigned long long dsize;
1232
1233 if (!get_dev_size(fd, NULL, &dsize))
1234 return 1;
1235
1236 dsize >>= 9;
1237
1238 if (dsize < 24)
1239 return 2;
1240
1241 init_afd(&afd, fd);
1242
1243 /*
1244 * Calculate the position of the superblock.
1245 * It is always aligned to a 4K boundary and
1246 * depending on minor_version, it can be:
1247 * 0: At least 8K, but less than 12K, from end of device
1248 * 1: At start of device
1249 * 2: 4K from start of device.
1250 */
1251 switch(st->minor_version) {
1252 case 0:
1253 sb_offset = dsize;
1254 sb_offset -= 8*2;
1255 sb_offset &= ~(4*2-1);
1256 break;
1257 case 1:
1258 sb_offset = 0;
1259 break;
1260 case 2:
1261 sb_offset = 4*2;
1262 break;
1263 default:
1264 return -EINVAL;
1265 }
1266
1267
1268
1269 if (sb_offset != __le64_to_cpu(sb->super_offset) &&
1270 0 != __le64_to_cpu(sb->super_offset)
1271 ) {
1272 pr_err("internal error - sb_offset is wrong\n");
1273 abort();
1274 }
1275
1276 if (lseek64(fd, sb_offset << 9, 0)< 0LL)
1277 return 3;
1278
1279 sbsize = ROUND_UP(sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev), 512);
1280
1281 if (awrite(&afd, sb, sbsize) != sbsize)
1282 return 4;
1283
1284 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
1285 struct bitmap_super_s *bm = (struct bitmap_super_s*)
1286 (((char*)sb)+MAX_SB_SIZE);
1287 if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
1288 locate_bitmap1(st, fd);
1289 if (awrite(&afd, bm, sizeof(*bm)) != sizeof(*bm))
1290 return 5;
1291 }
1292 }
1293 fsync(fd);
1294 return 0;
1295 }
1296
1297 static int load_super1(struct supertype *st, int fd, char *devname);
1298
1299 static unsigned long choose_bm_space(unsigned long devsize)
1300 {
1301 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
1302 * if bigger than 200Gig, save 128k
1303 * NOTE: result must be multiple of 4K else bad things happen
1304 * on 4K-sector devices.
1305 */
1306 if (devsize < 64*2) return 0;
1307 if (devsize - 64*2 >= 200*1024*1024*2)
1308 return 128*2;
1309 if (devsize - 4*2 > 8*1024*1024*2)
1310 return 64*2;
1311 return 4*2;
1312 }
1313
1314 static void free_super1(struct supertype *st);
1315
1316 #ifndef MDASSEMBLE
1317 static int write_init_super1(struct supertype *st)
1318 {
1319 struct mdp_superblock_1 *sb = st->sb;
1320 struct supertype *refst;
1321 int rfd;
1322 int rv = 0;
1323 unsigned long long bm_space;
1324 unsigned long long reserved;
1325 struct devinfo *di;
1326 unsigned long long dsize, array_size;
1327 unsigned long long sb_offset, headroom;
1328 unsigned long long data_offset;
1329
1330 for (di = st->info; di; di = di->next) {
1331 if (di->disk.state == 1)
1332 continue;
1333 if (di->fd < 0)
1334 continue;
1335
1336 while (Kill(di->devname, NULL, 0, -1, 1) == 0)
1337 ;
1338
1339 sb->dev_number = __cpu_to_le32(di->disk.number);
1340 if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY))
1341 sb->devflags |= WriteMostly1;
1342 else
1343 sb->devflags &= ~WriteMostly1;
1344
1345 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
1346 read(rfd, sb->device_uuid, 16) != 16) {
1347 __u32 r[4] = {random(), random(), random(), random()};
1348 memcpy(sb->device_uuid, r, 16);
1349 }
1350 if (rfd >= 0)
1351 close(rfd);
1352
1353 sb->events = 0;
1354
1355 refst = dup_super(st);
1356 if (load_super1(refst, di->fd, NULL)==0) {
1357 struct mdp_superblock_1 *refsb = refst->sb;
1358
1359 memcpy(sb->device_uuid, refsb->device_uuid, 16);
1360 if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
1361 /* same array, so preserve events and
1362 * dev_number */
1363 sb->events = refsb->events;
1364 /* bugs in 2.6.17 and earlier mean the
1365 * dev_number chosen in Manage must be preserved
1366 */
1367 if (get_linux_version() >= 2006018)
1368 sb->dev_number = refsb->dev_number;
1369 }
1370 free_super1(refst);
1371 }
1372 free(refst);
1373
1374 if (!get_dev_size(di->fd, NULL, &dsize)) {
1375 rv = 1;
1376 goto error_out;
1377 }
1378 dsize >>= 9;
1379
1380 if (dsize < 24) {
1381 close(di->fd);
1382 rv = 2;
1383 goto error_out;
1384 }
1385
1386
1387 /*
1388 * Calculate the position of the superblock.
1389 * It is always aligned to a 4K boundary and
1390 * depending on minor_version, it can be:
1391 * 0: At least 8K, but less than 12K, from end of device
1392 * 1: At start of device
1393 * 2: 4K from start of device.
1394 * Depending on the array size, we might leave extra space
1395 * for a bitmap.
1396 * Also leave 4K for bad-block log.
1397 */
1398 array_size = __le64_to_cpu(sb->size);
1399 /* work out how much space we left for a bitmap,
1400 * Add 8 sectors for bad block log */
1401 bm_space = choose_bm_space(array_size) + 8;
1402
1403 /* We try to leave 0.1% at the start for reshape
1404 * operations, but limit this to 128Meg (0.1% of 10Gig)
1405 * which is plenty for efficient reshapes
1406 * However we make it at least 2 chunks as one chunk
1407 * is minimum needed for reshape.
1408 */
1409 headroom = 128 * 1024 * 2;
1410 while (headroom << 10 > array_size &&
1411 headroom/2 >= __le32_to_cpu(sb->chunksize) * 2)
1412 headroom >>= 1;
1413
1414 data_offset = di->data_offset;
1415 switch(st->minor_version) {
1416 case 0:
1417 sb_offset = dsize;
1418 sb_offset -= 8*2;
1419 sb_offset &= ~(4*2-1);
1420 sb->super_offset = __cpu_to_le64(sb_offset);
1421 if (data_offset == INVALID_SECTORS)
1422 sb->data_offset = 0;
1423 if (sb_offset < array_size + bm_space)
1424 bm_space = sb_offset - array_size;
1425 sb->data_size = __cpu_to_le64(sb_offset - bm_space);
1426 if (bm_space >= 8) {
1427 sb->bblog_size = __cpu_to_le16(8);
1428 sb->bblog_offset = __cpu_to_le32((unsigned)-8);
1429 }
1430 break;
1431 case 1:
1432 sb->super_offset = __cpu_to_le64(0);
1433 if (data_offset == INVALID_SECTORS) {
1434 reserved = bm_space + 4*2;
1435 if (reserved < headroom)
1436 reserved = headroom;
1437 if (reserved + array_size > dsize)
1438 reserved = dsize - array_size;
1439 /* Try for multiple of 1Meg so it is nicely aligned */
1440 #define ONE_MEG (2*1024)
1441 if (reserved > ONE_MEG)
1442 reserved = (reserved/ONE_MEG) * ONE_MEG;
1443
1444 /* force 4K alignment */
1445 reserved &= ~7ULL;
1446
1447 } else
1448 reserved = data_offset;
1449
1450 sb->data_offset = __cpu_to_le64(reserved);
1451 sb->data_size = __cpu_to_le64(dsize - reserved);
1452 if (reserved >= 16) {
1453 sb->bblog_size = __cpu_to_le16(8);
1454 sb->bblog_offset = __cpu_to_le32(reserved-8);
1455 }
1456 break;
1457 case 2:
1458 sb_offset = 4*2;
1459 sb->super_offset = __cpu_to_le64(4*2);
1460 if (data_offset == INVALID_SECTORS) {
1461 if (4*2 + 4*2 + bm_space + array_size
1462 > dsize)
1463 bm_space = dsize - array_size
1464 - 4*2 - 4*2;
1465
1466 reserved = bm_space + 4*2 + 4*2;
1467 if (reserved < headroom)
1468 reserved = headroom;
1469 if (reserved + array_size > dsize)
1470 reserved = dsize - array_size;
1471 /* Try for multiple of 1Meg so it is nicely aligned */
1472 #define ONE_MEG (2*1024)
1473 if (reserved > ONE_MEG)
1474 reserved = (reserved/ONE_MEG) * ONE_MEG;
1475
1476 /* force 4K alignment */
1477 reserved &= ~7ULL;
1478
1479 } else
1480 reserved = data_offset;
1481
1482 sb->data_offset = __cpu_to_le64(reserved);
1483 sb->data_size = __cpu_to_le64(dsize - reserved);
1484 if (reserved >= 16+16) {
1485 sb->bblog_size = __cpu_to_le16(8);
1486 /* '8' sectors for the bblog, and another '8'
1487 * because we want offset from superblock, not
1488 * start of device.
1489 */
1490 sb->bblog_offset = __cpu_to_le32(reserved-8-8);
1491 }
1492 break;
1493 default:
1494 pr_err("Failed to write invalid "
1495 "metadata format 1.%i to %s\n",
1496 st->minor_version, di->devname);
1497 rv = -EINVAL;
1498 goto out;
1499 }
1500
1501 sb->sb_csum = calc_sb_1_csum(sb);
1502 rv = store_super1(st, di->fd);
1503 if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1))
1504 rv = st->ss->write_bitmap(st, di->fd);
1505 close(di->fd);
1506 di->fd = -1;
1507 if (rv)
1508 goto error_out;
1509 }
1510 error_out:
1511 if (rv)
1512 pr_err("Failed to write metadata to %s\n",
1513 di->devname);
1514 out:
1515 return rv;
1516 }
1517 #endif
1518
1519 static int compare_super1(struct supertype *st, struct supertype *tst)
1520 {
1521 /*
1522 * return:
1523 * 0 same, or first was empty, and second was copied
1524 * 1 second had wrong number
1525 * 2 wrong uuid
1526 * 3 wrong other info
1527 */
1528 struct mdp_superblock_1 *first = st->sb;
1529 struct mdp_superblock_1 *second = tst->sb;
1530
1531 if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
1532 return 1;
1533 if (second->major_version != __cpu_to_le32(1))
1534 return 1;
1535
1536 if (!first) {
1537 if (posix_memalign((void**)&first, 4096, SUPER1_SIZE) != 0) {
1538 pr_err("%s could not allocate superblock\n", __func__);
1539 return 1;
1540 }
1541 memcpy(first, second, SUPER1_SIZE);
1542 st->sb = first;
1543 return 0;
1544 }
1545 if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
1546 return 2;
1547
1548 if (first->ctime != second->ctime ||
1549 first->level != second->level ||
1550 first->layout != second->layout ||
1551 first->size != second->size ||
1552 first->chunksize != second->chunksize ||
1553 first->raid_disks != second->raid_disks)
1554 return 3;
1555 return 0;
1556 }
1557
1558 static int load_super1(struct supertype *st, int fd, char *devname)
1559 {
1560 unsigned long long dsize;
1561 unsigned long long sb_offset;
1562 struct mdp_superblock_1 *super;
1563 int uuid[4];
1564 struct bitmap_super_s *bsb;
1565 struct misc_dev_info *misc;
1566 struct align_fd afd;
1567
1568 free_super1(st);
1569
1570 init_afd(&afd, fd);
1571
1572 if (st->ss == NULL || st->minor_version == -1) {
1573 int bestvers = -1;
1574 struct supertype tst;
1575 __u64 bestctime = 0;
1576 /* guess... choose latest ctime */
1577 memset(&tst, 0, sizeof(tst));
1578 tst.ss = &super1;
1579 for (tst.minor_version = 0; tst.minor_version <= 2 ; tst.minor_version++) {
1580 switch(load_super1(&tst, fd, devname)) {
1581 case 0: super = tst.sb;
1582 if (bestvers == -1 ||
1583 bestctime < __le64_to_cpu(super->ctime)) {
1584 bestvers = tst.minor_version;
1585 bestctime = __le64_to_cpu(super->ctime);
1586 }
1587 free(super);
1588 tst.sb = NULL;
1589 break;
1590 case 1: return 1; /*bad device */
1591 case 2: break; /* bad, try next */
1592 }
1593 }
1594 if (bestvers != -1) {
1595 int rv;
1596 tst.minor_version = bestvers;
1597 tst.ss = &super1;
1598 tst.max_devs = MAX_DEVS;
1599 rv = load_super1(&tst, fd, devname);
1600 if (rv == 0)
1601 *st = tst;
1602 return rv;
1603 }
1604 return 2;
1605 }
1606 if (!get_dev_size(fd, devname, &dsize))
1607 return 1;
1608 dsize >>= 9;
1609
1610 if (dsize < 24) {
1611 if (devname)
1612 pr_err("%s is too small for md: size is %llu sectors.\n",
1613 devname, dsize);
1614 return 1;
1615 }
1616
1617 /*
1618 * Calculate the position of the superblock.
1619 * It is always aligned to a 4K boundary and
1620 * depending on minor_version, it can be:
1621 * 0: At least 8K, but less than 12K, from end of device
1622 * 1: At start of device
1623 * 2: 4K from start of device.
1624 */
1625 switch(st->minor_version) {
1626 case 0:
1627 sb_offset = dsize;
1628 sb_offset -= 8*2;
1629 sb_offset &= ~(4*2-1);
1630 break;
1631 case 1:
1632 sb_offset = 0;
1633 break;
1634 case 2:
1635 sb_offset = 4*2;
1636 break;
1637 default:
1638 return -EINVAL;
1639 }
1640
1641 if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
1642 if (devname)
1643 pr_err("Cannot seek to superblock on %s: %s\n",
1644 devname, strerror(errno));
1645 return 1;
1646 }
1647
1648 if (posix_memalign((void**)&super, 4096, SUPER1_SIZE) != 0) {
1649 pr_err("%s could not allocate superblock\n",
1650 __func__);
1651 return 1;
1652 }
1653
1654 if (aread(&afd, super, MAX_SB_SIZE) != MAX_SB_SIZE) {
1655 if (devname)
1656 pr_err("Cannot read superblock on %s\n",
1657 devname);
1658 free(super);
1659 return 1;
1660 }
1661
1662 if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) {
1663 if (devname)
1664 pr_err("No super block found on %s (Expected magic %08x, got %08x)\n",
1665 devname, MD_SB_MAGIC, __le32_to_cpu(super->magic));
1666 free(super);
1667 return 2;
1668 }
1669
1670 if (__le32_to_cpu(super->major_version) != 1) {
1671 if (devname)
1672 pr_err("Cannot interpret superblock on %s - version is %d\n",
1673 devname, __le32_to_cpu(super->major_version));
1674 free(super);
1675 return 2;
1676 }
1677 if (__le64_to_cpu(super->super_offset) != sb_offset) {
1678 if (devname)
1679 pr_err("No superblock found on %s (super_offset is wrong)\n",
1680 devname);
1681 free(super);
1682 return 2;
1683 }
1684 st->sb = super;
1685
1686 bsb = (struct bitmap_super_s *)(((char*)super)+MAX_SB_SIZE);
1687
1688 misc = (struct misc_dev_info*) (((char*)super)+MAX_SB_SIZE+BM_SUPER_SIZE);
1689 misc->device_size = dsize;
1690
1691 /* Now check on the bitmap superblock */
1692 if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
1693 return 0;
1694 /* Read the bitmap superblock and make sure it looks
1695 * valid. If it doesn't clear the bit. An --assemble --force
1696 * should get that written out.
1697 */
1698 locate_bitmap1(st, fd);
1699 if (aread(&afd, bsb, 512) != 512)
1700 goto no_bitmap;
1701
1702 uuid_from_super1(st, uuid);
1703 if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
1704 memcmp(bsb->uuid, uuid, 16) != 0)
1705 goto no_bitmap;
1706 return 0;
1707
1708 no_bitmap:
1709 super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map)
1710 & ~MD_FEATURE_BITMAP_OFFSET);
1711 return 0;
1712 }
1713
1714
1715 static struct supertype *match_metadata_desc1(char *arg)
1716 {
1717 struct supertype *st = xcalloc(1, sizeof(*st));
1718
1719 st->container_dev = NoMdDev;
1720 st->ss = &super1;
1721 st->max_devs = MAX_DEVS;
1722 st->sb = NULL;
1723 /* leading zeros can be safely ignored. --detail generates them. */
1724 while (*arg == '0')
1725 arg++;
1726 if (strcmp(arg, "1.0") == 0 ||
1727 strcmp(arg, "1.00") == 0) {
1728 st->minor_version = 0;
1729 return st;
1730 }
1731 if (strcmp(arg, "1.1") == 0 ||
1732 strcmp(arg, "1.01") == 0
1733 ) {
1734 st->minor_version = 1;
1735 return st;
1736 }
1737 if (strcmp(arg, "1.2") == 0 ||
1738 #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
1739 strcmp(arg, "default") == 0 ||
1740 #endif /* DEFAULT_OLD_METADATA */
1741 strcmp(arg, "1.02") == 0) {
1742 st->minor_version = 2;
1743 return st;
1744 }
1745 if (strcmp(arg, "1") == 0 ||
1746 strcmp(arg, "default") == 0) {
1747 st->minor_version = -1;
1748 return st;
1749 }
1750
1751 free(st);
1752 return NULL;
1753 }
1754
1755 /* find available size on device with this devsize, using
1756 * superblock type st, and reserving 'reserve' sectors for
1757 * a possible bitmap
1758 */
1759 static __u64 _avail_size1(struct supertype *st, __u64 devsize,
1760 unsigned long long data_offset, int chunksize)
1761 {
1762 struct mdp_superblock_1 *super = st->sb;
1763 int bmspace = 0;
1764 if (devsize < 24)
1765 return 0;
1766
1767 if (super == NULL)
1768 /* creating: allow suitable space for bitmap */
1769 bmspace = choose_bm_space(devsize);
1770 #ifndef MDASSEMBLE
1771 else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
1772 /* hot-add. allow for actual size of bitmap */
1773 struct bitmap_super_s *bsb;
1774 bsb = (struct bitmap_super_s *)(((char*)super)+MAX_SB_SIZE);
1775 bmspace = bitmap_sectors(bsb);
1776 }
1777 #endif
1778 /* Allow space for bad block log */
1779 if (super && super->bblog_size)
1780 devsize -= __le16_to_cpu(super->bblog_size);
1781 else
1782 devsize -= 8;
1783
1784
1785 if (st->minor_version < 0)
1786 /* not specified, so time to set default */
1787 st->minor_version = 2;
1788
1789 if (data_offset != INVALID_SECTORS)
1790 switch(st->minor_version) {
1791 case 0:
1792 return devsize - data_offset - 8*2;
1793 case 1:
1794 case 2:
1795 return devsize - data_offset;
1796 default:
1797 return 0;
1798 }
1799
1800 devsize -= bmspace;
1801
1802 if (super == NULL && st->minor_version > 0) {
1803 /* haven't committed to a size yet, so allow some
1804 * slack for space for reshape.
1805 * Limit slack to 128M, but aim for about 0.1%
1806 */
1807 unsigned long long headroom = 128*1024*2;
1808 while ((headroom << 10) > devsize &&
1809 (chunksize == 0 ||
1810 headroom / 2 >= ((unsigned)chunksize*2)*2))
1811 headroom >>= 1;
1812 devsize -= headroom;
1813 }
1814 switch(st->minor_version) {
1815 case 0:
1816 /* at end */
1817 return ((devsize - 8*2 ) & ~(4*2-1));
1818 case 1:
1819 /* at start, 4K for superblock and possible bitmap */
1820 return devsize - 4*2;
1821 case 2:
1822 /* 4k from start, 4K for superblock and possible bitmap */
1823 return devsize - (4+4)*2;
1824 }
1825 return 0;
1826 }
1827 static __u64 avail_size1(struct supertype *st, __u64 devsize,
1828 unsigned long long data_offset)
1829 {
1830 return _avail_size1(st, devsize, data_offset, 0);
1831 }
1832
1833 static int
1834 add_internal_bitmap1(struct supertype *st,
1835 int *chunkp, int delay, int write_behind,
1836 unsigned long long size,
1837 int may_change, int major)
1838 {
1839 /*
1840 * If not may_change, then this is a 'Grow' without sysfs support for
1841 * bitmaps, and the bitmap must fit after the superblock at 1K offset.
1842 * If may_change, then this is create or a Grow with sysfs syupport,
1843 * and we can put the bitmap wherever we like.
1844 *
1845 * size is in sectors, chunk is in bytes !!!
1846 */
1847
1848 unsigned long long bits;
1849 unsigned long long max_bits;
1850 unsigned long long min_chunk;
1851 long offset;
1852 long bbl_offset, bbl_size;
1853 unsigned long long chunk = *chunkp;
1854 int room = 0;
1855 int creating = 0;
1856 struct mdp_superblock_1 *sb = st->sb;
1857 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE);
1858 int uuid[4];
1859
1860
1861 if (__le64_to_cpu(sb->data_size) == 0)
1862 /* Must be creating the array, else data_size would be non-zero */
1863 creating = 1;
1864 switch(st->minor_version) {
1865 case 0:
1866 /* either 3K after the superblock (when hot-add),
1867 * or some amount of space before.
1868 */
1869 if (creating) {
1870 /* We are creating array, so we *know* how much room has
1871 * been left.
1872 */
1873 offset = 0;
1874 room = choose_bm_space(__le64_to_cpu(sb->size));
1875 bbl_size = 8;
1876 } else {
1877 room = __le64_to_cpu(sb->super_offset)
1878 - __le64_to_cpu(sb->data_offset)
1879 - __le64_to_cpu(sb->data_size);
1880 bbl_size = __le16_to_cpu(sb->bblog_size);
1881 if (bbl_size < 8)
1882 bbl_size = 8;
1883 bbl_offset = (__s32)__le32_to_cpu(sb->bblog_offset);
1884 if (bbl_size < -bbl_offset)
1885 bbl_size = -bbl_offset;
1886
1887 if (!may_change || (room < 3*2 &&
1888 __le32_to_cpu(sb->max_dev) <= 384)) {
1889 room = 3*2;
1890 offset = 1*2;
1891 bbl_size = 0;
1892 } else {
1893 offset = 0; /* means movable offset */
1894 }
1895 }
1896 break;
1897 case 1:
1898 case 2: /* between superblock and data */
1899 if (creating) {
1900 offset = 4*2;
1901 room = choose_bm_space(__le64_to_cpu(sb->size));
1902 bbl_size = 8;
1903 } else {
1904 room = __le64_to_cpu(sb->data_offset)
1905 - __le64_to_cpu(sb->super_offset);
1906 bbl_size = __le16_to_cpu(sb->bblog_size);
1907 if (bbl_size)
1908 room = __le32_to_cpu(sb->bblog_offset) + bbl_size;
1909 else
1910 bbl_size = 8;
1911
1912 if (!may_change) {
1913 room -= 2; /* Leave 1K for superblock */
1914 offset = 2;
1915 bbl_size = 0;
1916 } else {
1917 room -= 4*2; /* leave 4K for superblock */
1918 offset = 4*2;
1919 }
1920 }
1921 break;
1922 default:
1923 return 0;
1924 }
1925
1926 room -= bbl_size;
1927 if (chunk == UnSet && room > 128*2)
1928 /* Limit to 128K of bitmap when chunk size not requested */
1929 room = 128*2;
1930
1931 max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8;
1932
1933 min_chunk = 4096; /* sub-page chunks don't work yet.. */
1934 bits = (size*512)/min_chunk +1;
1935 while (bits > max_bits) {
1936 min_chunk *= 2;
1937 bits = (bits+1)/2;
1938 }
1939 if (chunk == UnSet) {
1940 /* For practical purpose, 64Meg is a good
1941 * default chunk size for internal bitmaps.
1942 */
1943 chunk = min_chunk;
1944 if (chunk < 64*1024*1024)
1945 chunk = 64*1024*1024;
1946 } else if (chunk < min_chunk)
1947 return 0; /* chunk size too small */
1948 if (chunk == 0) /* rounding problem */
1949 return 0;
1950
1951 if (offset == 0) {
1952 /* start bitmap on a 4K boundary with enough space for
1953 * the bitmap
1954 */
1955 bits = (size*512) / chunk + 1;
1956 room = ((bits+7)/8 + sizeof(bitmap_super_t) +4095)/4096;
1957 room *= 8; /* convert 4K blocks to sectors */
1958 offset = -room - bbl_size;
1959 }
1960
1961 sb->bitmap_offset = (int32_t)__cpu_to_le32(offset);
1962
1963 sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map)
1964 | MD_FEATURE_BITMAP_OFFSET);
1965 memset(bms, 0, sizeof(*bms));
1966 bms->magic = __cpu_to_le32(BITMAP_MAGIC);
1967 bms->version = __cpu_to_le32(major);
1968 uuid_from_super1(st, uuid);
1969 memcpy(bms->uuid, uuid, 16);
1970 bms->chunksize = __cpu_to_le32(chunk);
1971 bms->daemon_sleep = __cpu_to_le32(delay);
1972 bms->sync_size = __cpu_to_le64(size);
1973 bms->write_behind = __cpu_to_le32(write_behind);
1974
1975 *chunkp = chunk;
1976 return 1;
1977 }
1978
1979 static void locate_bitmap1(struct supertype *st, int fd)
1980 {
1981 unsigned long long offset;
1982 struct mdp_superblock_1 *sb;
1983 int mustfree = 0;
1984
1985 if (!st->sb) {
1986 if (st->ss->load_super(st, fd, NULL))
1987 return; /* no error I hope... */
1988 mustfree = 1;
1989 }
1990 sb = st->sb;
1991
1992 offset = __le64_to_cpu(sb->super_offset);
1993 offset += (int32_t) __le32_to_cpu(sb->bitmap_offset);
1994 if (mustfree)
1995 free(sb);
1996 lseek64(fd, offset<<9, 0);
1997 }
1998
1999 static int write_bitmap1(struct supertype *st, int fd)
2000 {
2001 struct mdp_superblock_1 *sb = st->sb;
2002 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE);
2003 int rv = 0;
2004 void *buf;
2005 int towrite, n;
2006 struct align_fd afd;
2007
2008 init_afd(&afd, fd);
2009
2010 locate_bitmap1(st, fd);
2011
2012 if (posix_memalign(&buf, 4096, 4096))
2013 return -ENOMEM;
2014
2015 memset(buf, 0xff, 4096);
2016 memcpy(buf, (char *)bms, sizeof(bitmap_super_t));
2017
2018 towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
2019 towrite = (towrite+7) >> 3; /* bits to bytes */
2020 towrite += sizeof(bitmap_super_t);
2021 towrite = ROUND_UP(towrite, 512);
2022 while (towrite > 0) {
2023 n = towrite;
2024 if (n > 4096)
2025 n = 4096;
2026 n = awrite(&afd, buf, n);
2027 if (n > 0)
2028 towrite -= n;
2029 else
2030 break;
2031 memset(buf, 0xff, 4096);
2032 }
2033 fsync(fd);
2034 if (towrite)
2035 rv = -2;
2036
2037 free(buf);
2038 return rv;
2039 }
2040
2041 static void free_super1(struct supertype *st)
2042 {
2043 if (st->sb)
2044 free(st->sb);
2045 while (st->info) {
2046 struct devinfo *di = st->info;
2047 st->info = di->next;
2048 if (di->fd >= 0)
2049 close(di->fd);
2050 free(di);
2051 }
2052 st->sb = NULL;
2053 }
2054
2055 #ifndef MDASSEMBLE
2056 static int validate_geometry1(struct supertype *st, int level,
2057 int layout, int raiddisks,
2058 int *chunk, unsigned long long size,
2059 unsigned long long data_offset,
2060 char *subdev, unsigned long long *freesize,
2061 int verbose)
2062 {
2063 unsigned long long ldsize;
2064 int fd;
2065
2066 if (level == LEVEL_CONTAINER) {
2067 if (verbose)
2068 pr_err("1.x metadata does not support containers\n");
2069 return 0;
2070 }
2071 if (chunk && *chunk == UnSet)
2072 *chunk = DEFAULT_CHUNK;
2073
2074 if (!subdev)
2075 return 1;
2076
2077 fd = open(subdev, O_RDONLY|O_EXCL, 0);
2078 if (fd < 0) {
2079 if (verbose)
2080 pr_err("super1.x cannot open %s: %s\n",
2081 subdev, strerror(errno));
2082 return 0;
2083 }
2084
2085 if (!get_dev_size(fd, subdev, &ldsize)) {
2086 close(fd);
2087 return 0;
2088 }
2089 close(fd);
2090
2091 *freesize = _avail_size1(st, ldsize >> 9, data_offset, *chunk);
2092 return 1;
2093 }
2094 #endif /* MDASSEMBLE */
2095
2096 struct superswitch super1 = {
2097 #ifndef MDASSEMBLE
2098 .examine_super = examine_super1,
2099 .brief_examine_super = brief_examine_super1,
2100 .export_examine_super = export_examine_super1,
2101 .detail_super = detail_super1,
2102 .brief_detail_super = brief_detail_super1,
2103 .export_detail_super = export_detail_super1,
2104 .write_init_super = write_init_super1,
2105 .validate_geometry = validate_geometry1,
2106 .add_to_super = add_to_super1,
2107 .examine_badblocks = examine_badblocks_super1,
2108 #endif
2109 .match_home = match_home1,
2110 .uuid_from_super = uuid_from_super1,
2111 .getinfo_super = getinfo_super1,
2112 .container_content = container_content1,
2113 .update_super = update_super1,
2114 .init_super = init_super1,
2115 .store_super = store_super1,
2116 .compare_super = compare_super1,
2117 .load_super = load_super1,
2118 .match_metadata_desc = match_metadata_desc1,
2119 .avail_size = avail_size1,
2120 .add_internal_bitmap = add_internal_bitmap1,
2121 .locate_bitmap = locate_bitmap1,
2122 .write_bitmap = write_bitmap1,
2123 .free_super = free_super1,
2124 #if __BYTE_ORDER == BIG_ENDIAN
2125 .swapuuid = 0,
2126 #else
2127 .swapuuid = 1,
2128 #endif
2129 .name = "1.x",
2130 };
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