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Create.c: fix uclibc build
[thirdparty/mdadm.git] / super1.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2016 Neil Brown <neilb@suse.com>
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 <stddef.h>
26 #include "mdadm.h"
27 /*
28 * The version-1 superblock :
29 * All numeric fields are little-endian.
30 *
31 * total size: 256 bytes plus 2 per device.
32 * 1K allows 384 devices.
33 */
34 struct mdp_superblock_1 {
35 /* constant array information - 128 bytes */
36 __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
37 __u32 major_version; /* 1 */
38 __u32 feature_map; /* 0 for now */
39 __u32 pad0; /* always set to 0 when writing */
40
41 __u8 set_uuid[16]; /* user-space generated. */
42 char set_name[32]; /* set and interpreted by user-space */
43
44 __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
45 __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */
46 __u32 layout; /* used for raid5, raid6, raid10, and raid0 */
47 __u64 size; /* used size of component devices, in 512byte sectors */
48
49 __u32 chunksize; /* in 512byte sectors */
50 __u32 raid_disks;
51 union {
52 __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts
53 * NOTE: signed, so bitmap can be before superblock
54 * only meaningful of feature_map[0] is set.
55 */
56
57 /* only meaningful when feature_map[MD_FEATURE_PPL] is set */
58 struct {
59 __s16 offset; /* sectors from start of superblock that ppl starts */
60 __u16 size; /* ppl size in sectors */
61 } ppl;
62 };
63
64 /* These are only valid with feature bit '4' */
65 __u32 new_level; /* new level we are reshaping to */
66 __u64 reshape_position; /* next address in array-space for reshape */
67 __u32 delta_disks; /* change in number of raid_disks */
68 __u32 new_layout; /* new layout */
69 __u32 new_chunk; /* new chunk size (sectors) */
70 __u32 new_offset; /* signed number to add to data_offset in new
71 * layout. 0 == no-change. This can be
72 * different on each device in the array.
73 */
74
75 /* constant this-device information - 64 bytes */
76 __u64 data_offset; /* sector start of data, often 0 */
77 __u64 data_size; /* sectors in this device that can be used for data */
78 __u64 super_offset; /* sector start of this superblock */
79 union {
80 __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */
81 __u64 journal_tail;/* journal tail of journal device (from data_offset) */
82 };
83 __u32 dev_number; /* permanent identifier of this device - not role in raid */
84 __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
85 __u8 device_uuid[16]; /* user-space setable, ignored by kernel */
86 __u8 devflags; /* per-device flags. Only one defined...*/
87 #define WriteMostly1 1 /* mask for writemostly flag in above */
88 #define FailFast1 2 /* Device should get FailFast requests */
89 /* bad block log. If there are any bad blocks the feature flag is set.
90 * if offset and size are non-zero, that space is reserved and available.
91 */
92 __u8 bblog_shift; /* shift from sectors to block size for badblock list */
93 __u16 bblog_size; /* number of sectors reserved for badblock list */
94 __u32 bblog_offset; /* sector offset from superblock to bblog, signed */
95
96 /* array state information - 64 bytes */
97 __u64 utime; /* 40 bits second, 24 bits microseconds */
98 __u64 events; /* incremented when superblock updated */
99 __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */
100 __u32 sb_csum; /* checksum upto dev_roles[max_dev] */
101 __u32 max_dev; /* size of dev_roles[] array to consider */
102 __u8 pad3[64-32]; /* set to 0 when writing */
103
104 /* device state information. Indexed by dev_number.
105 * 2 bytes per device
106 * Note there are no per-device state flags. State information is rolled
107 * into the 'roles' value. If a device is spare or faulty, then it doesn't
108 * have a meaningful role.
109 */
110 __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
111 };
112
113 #define MAX_SB_SIZE 4096
114 /* bitmap super size is 256, but we round up to a sector for alignment */
115 #define BM_SUPER_SIZE 512
116 #define MAX_DEVS ((int)(MAX_SB_SIZE - sizeof(struct mdp_superblock_1)) / 2)
117 #define SUPER1_SIZE (MAX_SB_SIZE + BM_SUPER_SIZE \
118 + sizeof(struct misc_dev_info))
119
120 struct misc_dev_info {
121 __u64 device_size;
122 };
123
124 #define MULTIPLE_PPL_AREA_SIZE_SUPER1 (1024 * 1024) /* Size of the whole
125 * mutliple PPL area
126 */
127 /* feature_map bits */
128 #define MD_FEATURE_BITMAP_OFFSET 1
129 #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
130 * must be honoured
131 */
132 #define MD_FEATURE_RESHAPE_ACTIVE 4
133 #define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */
134 #define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an
135 * active device with same 'role'.
136 * 'recovery_offset' is also set.
137 */
138 #define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number
139 * of devices, but is going
140 * backwards anyway.
141 */
142 #define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */
143 #define MD_FEATURE_BITMAP_VERSIONED 256 /* bitmap version number checked properly */
144 #define MD_FEATURE_JOURNAL 512 /* support write journal */
145 #define MD_FEATURE_PPL 1024 /* support PPL */
146 #define MD_FEATURE_MUTLIPLE_PPLS 2048 /* support for multiple PPLs */
147 #define MD_FEATURE_RAID0_LAYOUT 4096 /* layout is meaningful in RAID0 */
148 #define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \
149 |MD_FEATURE_RECOVERY_OFFSET \
150 |MD_FEATURE_RESHAPE_ACTIVE \
151 |MD_FEATURE_BAD_BLOCKS \
152 |MD_FEATURE_REPLACEMENT \
153 |MD_FEATURE_RESHAPE_BACKWARDS \
154 |MD_FEATURE_NEW_OFFSET \
155 |MD_FEATURE_BITMAP_VERSIONED \
156 |MD_FEATURE_JOURNAL \
157 |MD_FEATURE_PPL \
158 |MD_FEATURE_MULTIPLE_PPLS \
159 |MD_FEATURE_RAID0_LAYOUT \
160 )
161
162 static int role_from_sb(struct mdp_superblock_1 *sb)
163 {
164 unsigned int d;
165 int role;
166
167 d = __le32_to_cpu(sb->dev_number);
168 if (d < __le32_to_cpu(sb->max_dev))
169 role = __le16_to_cpu(sb->dev_roles[d]);
170 else
171 role = MD_DISK_ROLE_SPARE;
172 return role;
173 }
174
175 /* return how many bytes are needed for bitmap, for cluster-md each node
176 * should have it's own bitmap */
177 static unsigned int calc_bitmap_size(bitmap_super_t *bms, unsigned int boundary)
178 {
179 unsigned long long bits, bytes;
180
181 bits = bitmap_bits(__le64_to_cpu(bms->sync_size),
182 __le32_to_cpu(bms->chunksize));
183 bytes = (bits+7) >> 3;
184 bytes += sizeof(bitmap_super_t);
185 bytes = ROUND_UP(bytes, boundary);
186
187 return bytes;
188 }
189
190 static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
191 {
192 unsigned int disk_csum, csum;
193 unsigned long long newcsum;
194 int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2;
195 unsigned int *isuper = (unsigned int*)sb;
196
197 /* make sure I can count... */
198 if (offsetof(struct mdp_superblock_1,data_offset) != 128 ||
199 offsetof(struct mdp_superblock_1, utime) != 192 ||
200 sizeof(struct mdp_superblock_1) != 256) {
201 fprintf(stderr, "WARNING - superblock isn't sized correctly\n");
202 }
203
204 disk_csum = sb->sb_csum;
205 sb->sb_csum = 0;
206 newcsum = 0;
207 for (; size>=4; size -= 4 ) {
208 newcsum += __le32_to_cpu(*isuper);
209 isuper++;
210 }
211
212 if (size == 2)
213 newcsum += __le16_to_cpu(*(unsigned short*) isuper);
214
215 csum = (newcsum & 0xffffffff) + (newcsum >> 32);
216 sb->sb_csum = disk_csum;
217 return __cpu_to_le32(csum);
218 }
219
220 /*
221 * Information related to file descriptor used for aligned reads/writes.
222 * Cache the block size.
223 */
224 struct align_fd {
225 int fd;
226 int blk_sz;
227 };
228
229 static void init_afd(struct align_fd *afd, int fd)
230 {
231 afd->fd = fd;
232 if (!get_dev_sector_size(afd->fd, NULL, (unsigned int *)&afd->blk_sz))
233 afd->blk_sz = 512;
234 }
235
236 static char abuf[4096+4096];
237
238 static int aread(struct align_fd *afd, void *buf, int len)
239 {
240 /* aligned read.
241 * On devices with a 4K sector size, we need to read
242 * the full sector and copy relevant bits into
243 * the buffer
244 */
245 int bsize, iosize;
246 char *b;
247 int n;
248
249 bsize = afd->blk_sz;
250
251 if (!bsize || bsize > 4096 || len > 4096) {
252 if (!bsize)
253 fprintf(stderr, "WARNING - aread() called with invalid block size\n");
254 return -1;
255 }
256 b = ROUND_UP_PTR((char *)abuf, 4096);
257
258 for (iosize = 0; iosize < len; iosize += bsize)
259 ;
260 n = read(afd->fd, b, iosize);
261 if (n <= 0)
262 return n;
263 lseek(afd->fd, len - n, 1);
264 if (n > len)
265 n = len;
266 memcpy(buf, b, n);
267 return n;
268 }
269
270 static int awrite(struct align_fd *afd, void *buf, int len)
271 {
272 /* aligned write.
273 * On devices with a 4K sector size, we need to write
274 * the full sector. We pre-read if the sector is larger
275 * than the write.
276 * The address must be sector-aligned.
277 */
278 int bsize, iosize;
279 char *b;
280 int n;
281
282 bsize = afd->blk_sz;
283 if (!bsize || bsize > 4096 || len > 4096) {
284 if (!bsize)
285 fprintf(stderr, "WARNING - awrite() called with invalid block size\n");
286 return -1;
287 }
288 b = ROUND_UP_PTR((char *)abuf, 4096);
289
290 for (iosize = 0; iosize < len ; iosize += bsize)
291 ;
292
293 if (len != iosize) {
294 n = read(afd->fd, b, iosize);
295 if (n <= 0)
296 return n;
297 lseek(afd->fd, -n, 1);
298 }
299
300 memcpy(b, buf, len);
301 n = write(afd->fd, b, iosize);
302 if (n <= 0)
303 return n;
304 lseek(afd->fd, len - n, 1);
305 return len;
306 }
307
308 static inline unsigned int md_feature_any_ppl_on(__u32 feature_map)
309 {
310 return ((__cpu_to_le32(feature_map) &
311 (MD_FEATURE_PPL | MD_FEATURE_MUTLIPLE_PPLS)));
312 }
313
314 static inline unsigned int choose_ppl_space(int chunk)
315 {
316 return (PPL_HEADER_SIZE >> 9) + (chunk > 128*2 ? chunk : 128*2);
317 }
318
319 static void examine_super1(struct supertype *st, char *homehost)
320 {
321 struct mdp_superblock_1 *sb = st->sb;
322 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE);
323 time_t atime;
324 unsigned int d;
325 int role;
326 int delta_extra = 0;
327 int i;
328 char *c;
329 int l = homehost ? strlen(homehost) : 0;
330 int layout;
331 unsigned long long sb_offset;
332 struct mdinfo info;
333
334 printf(" Magic : %08x\n", __le32_to_cpu(sb->magic));
335 printf(" Version : 1");
336 sb_offset = __le64_to_cpu(sb->super_offset);
337 if (sb_offset <= 4)
338 printf(".1\n");
339 else if (sb_offset <= 8)
340 printf(".2\n");
341 else
342 printf(".0\n");
343 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map));
344 printf(" Array UUID : ");
345 for (i=0; i<16; i++) {
346 if ((i&3)==0 && i != 0) printf(":");
347 printf("%02x", sb->set_uuid[i]);
348 }
349 printf("\n");
350 printf(" Name : %.32s", sb->set_name);
351 if (l > 0 && l < 32 &&
352 sb->set_name[l] == ':' &&
353 strncmp(sb->set_name, homehost, l) == 0)
354 printf(" (local to host %s)", homehost);
355 printf("\n");
356 if (bms->nodes > 0 &&
357 (__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET))
358 printf(" Cluster Name : %-64s\n", bms->cluster_name);
359 atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL;
360 printf(" Creation Time : %.24s\n", ctime(&atime));
361 c=map_num(pers, __le32_to_cpu(sb->level));
362 printf(" Raid Level : %s\n", c?c:"-unknown-");
363 printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks));
364 printf("\n");
365 printf(" Avail Dev Size : %llu sectors%s\n",
366 (unsigned long long)__le64_to_cpu(sb->data_size),
367 human_size(__le64_to_cpu(sb->data_size)<<9));
368 if (__le32_to_cpu(sb->level) > 0) {
369 int ddsks = 0, ddsks_denom = 1;
370 switch(__le32_to_cpu(sb->level)) {
371 case 1: ddsks=1;break;
372 case 4:
373 case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break;
374 case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break;
375 case 10:
376 layout = __le32_to_cpu(sb->layout);
377 ddsks = __le32_to_cpu(sb->raid_disks);
378 ddsks_denom = (layout&255) * ((layout>>8)&255);
379 }
380 if (ddsks) {
381 long long asize = __le64_to_cpu(sb->size);
382 asize = (asize << 9) * ddsks / ddsks_denom;
383 printf(" Array Size : %llu KiB%s\n",
384 asize >> 10, human_size(asize));
385 }
386 if (sb->size != sb->data_size)
387 printf(" Used Dev Size : %llu sectors%s\n",
388 (unsigned long long)__le64_to_cpu(sb->size),
389 human_size(__le64_to_cpu(sb->size)<<9));
390 }
391 if (sb->data_offset)
392 printf(" Data Offset : %llu sectors\n",
393 (unsigned long long)__le64_to_cpu(sb->data_offset));
394 if (sb->new_offset &&
395 (__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) {
396 unsigned long long offset = __le64_to_cpu(sb->data_offset);
397 offset += (signed)(int32_t)__le32_to_cpu(sb->new_offset);
398 printf(" New Offset : %llu sectors\n", offset);
399 }
400 printf(" Super Offset : %llu sectors\n",
401 (unsigned long long)__le64_to_cpu(sb->super_offset));
402 if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)
403 printf("Recovery Offset : %llu sectors\n",
404 (unsigned long long)__le64_to_cpu(sb->recovery_offset));
405
406 st->ss->getinfo_super(st, &info, NULL);
407 if (info.space_after != 1 &&
408 !(__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET))
409 printf(" Unused Space : before=%llu sectors, after=%llu sectors\n",
410 info.space_before, info.space_after);
411
412 printf(" State : %s\n",
413 (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
414 printf(" Device UUID : ");
415 for (i=0; i<16; i++) {
416 if ((i&3)==0 && i != 0)
417 printf(":");
418 printf("%02x", sb->device_uuid[i]);
419 }
420 printf("\n");
421 printf("\n");
422 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
423 printf("Internal Bitmap : %ld sectors from superblock\n",
424 (long)(int32_t)__le32_to_cpu(sb->bitmap_offset));
425 } else if (md_feature_any_ppl_on(sb->feature_map)) {
426 printf(" PPL : %u sectors at offset %d sectors from superblock\n",
427 __le16_to_cpu(sb->ppl.size),
428 __le16_to_cpu(sb->ppl.offset));
429 }
430 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE)) {
431 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)
432 __le64_to_cpu(sb->reshape_position)/2,
433 human_size(__le64_to_cpu(sb->reshape_position)<<9));
434 if (__le32_to_cpu(sb->delta_disks)) {
435 printf(" Delta Devices : %d",
436 __le32_to_cpu(sb->delta_disks));
437 printf(" (%d->%d)\n",
438 __le32_to_cpu(sb->raid_disks) -
439 __le32_to_cpu(sb->delta_disks),
440 __le32_to_cpu(sb->raid_disks));
441 if ((int)__le32_to_cpu(sb->delta_disks) < 0)
442 delta_extra = -__le32_to_cpu(sb->delta_disks);
443 }
444 if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) {
445 c = map_num(pers, __le32_to_cpu(sb->new_level));
446 printf(" New Level : %s\n", c?c:"-unknown-");
447 }
448 if (__le32_to_cpu(sb->new_layout) !=
449 __le32_to_cpu(sb->layout)) {
450 if (__le32_to_cpu(sb->level) == 5) {
451 c = map_num(r5layout,
452 __le32_to_cpu(sb->new_layout));
453 printf(" New Layout : %s\n", c?c:"-unknown-");
454 }
455 if (__le32_to_cpu(sb->level) == 6) {
456 c = map_num(r6layout,
457 __le32_to_cpu(sb->new_layout));
458 printf(" New Layout : %s\n", c?c:"-unknown-");
459 }
460 if (__le32_to_cpu(sb->level) == 10) {
461 printf(" New Layout :");
462 print_r10_layout(__le32_to_cpu(sb->new_layout));
463 printf("\n");
464 }
465 }
466 if (__le32_to_cpu(sb->new_chunk) !=
467 __le32_to_cpu(sb->chunksize))
468 printf(" New Chunksize : %dK\n",
469 __le32_to_cpu(sb->new_chunk)/2);
470 printf("\n");
471 }
472 if (sb->devflags) {
473 printf(" Flags :");
474 if (sb->devflags & WriteMostly1)
475 printf(" write-mostly");
476 if (sb->devflags & FailFast1)
477 printf(" failfast");
478 printf("\n");
479 }
480
481 atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL;
482 printf(" Update Time : %.24s\n", ctime(&atime));
483
484 if (sb->bblog_size && sb->bblog_offset) {
485 printf(" Bad Block Log : %d entries available at offset %ld sectors",
486 __le16_to_cpu(sb->bblog_size)*512/8,
487 (long)(int32_t)__le32_to_cpu(sb->bblog_offset));
488 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS))
489 printf(" - bad blocks present.");
490 printf("\n");
491 }
492
493 if (calc_sb_1_csum(sb) == sb->sb_csum)
494 printf(" Checksum : %x - correct\n",
495 __le32_to_cpu(sb->sb_csum));
496 else
497 printf(" Checksum : %x - expected %x\n",
498 __le32_to_cpu(sb->sb_csum),
499 __le32_to_cpu(calc_sb_1_csum(sb)));
500 printf(" Events : %llu\n",
501 (unsigned long long)__le64_to_cpu(sb->events));
502 printf("\n");
503 if (__le32_to_cpu(sb->level) == 0 &&
504 (sb->feature_map & __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT))) {
505 c = map_num(r0layout, __le32_to_cpu(sb->layout));
506 printf(" Layout : %s\n", c?c:"-unknown-");
507 }
508 if (__le32_to_cpu(sb->level) == 5) {
509 c = map_num(r5layout, __le32_to_cpu(sb->layout));
510 printf(" Layout : %s\n", c?c:"-unknown-");
511 }
512 if (__le32_to_cpu(sb->level) == 6) {
513 c = map_num(r6layout, __le32_to_cpu(sb->layout));
514 printf(" Layout : %s\n", c?c:"-unknown-");
515 }
516 if (__le32_to_cpu(sb->level) == 10) {
517 int lo = __le32_to_cpu(sb->layout);
518 printf(" Layout :");
519 print_r10_layout(lo);
520 printf("\n");
521 }
522 switch(__le32_to_cpu(sb->level)) {
523 case 0:
524 case 4:
525 case 5:
526 case 6:
527 case 10:
528 printf(" Chunk Size : %dK\n",
529 __le32_to_cpu(sb->chunksize)/2);
530 break;
531 case -1:
532 printf(" Rounding : %dK\n",
533 __le32_to_cpu(sb->chunksize)/2);
534 break;
535 default:
536 break;
537 }
538 printf("\n");
539 #if 0
540 /* This turns out to just be confusing */
541 printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number));
542 for (i = __le32_to_cpu(sb->max_dev); i> 0 ; i--)
543 if (__le16_to_cpu(sb->dev_roles[i-1]) != MD_DISK_ROLE_SPARE)
544 break;
545 for (d = 0; d < i; d++) {
546 int role = __le16_to_cpu(sb->dev_roles[d]);
547 if (d)
548 printf(", ");
549 if (role == MD_DISK_ROLE_SPARE)
550 printf("empty");
551 else
552 if(role == MD_DISK_ROLE_FAULTY)
553 printf("failed");
554 else
555 printf("%d", role);
556 }
557 printf(")\n");
558 #endif
559 printf(" Device Role : ");
560 role = role_from_sb(sb);
561 if (role >= MD_DISK_ROLE_FAULTY)
562 printf("spare\n");
563 else if (role == MD_DISK_ROLE_JOURNAL)
564 printf("Journal\n");
565 else if (sb->feature_map & __cpu_to_le32(MD_FEATURE_REPLACEMENT))
566 printf("Replacement device %d\n", role);
567 else
568 printf("Active device %d\n", role);
569
570 printf(" Array State : ");
571 for (d = 0; d < __le32_to_cpu(sb->raid_disks) + delta_extra; d++) {
572 int cnt = 0;
573 unsigned int i;
574 for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) {
575 unsigned int role = __le16_to_cpu(sb->dev_roles[i]);
576 if (role == d)
577 cnt++;
578 }
579 if (cnt == 2)
580 printf("R");
581 else if (cnt == 1)
582 printf("A");
583 else if (cnt == 0)
584 printf(".");
585 else
586 printf("?");
587 }
588 #if 0
589 /* This is confusing too */
590 faulty = 0;
591 for (i = 0; i< __le32_to_cpu(sb->max_dev); i++) {
592 int role = __le16_to_cpu(sb->dev_roles[i]);
593 if (role == MD_DISK_ROLE_FAULTY)
594 faulty++;
595 }
596 if (faulty)
597 printf(" %d failed", faulty);
598 #endif
599 printf(" ('A' == active, '.' == missing, 'R' == replacing)");
600 printf("\n");
601 }
602
603 static void brief_examine_super1(struct supertype *st, int verbose)
604 {
605 struct mdp_superblock_1 *sb = st->sb;
606 int i;
607 unsigned long long sb_offset;
608 char *nm;
609 char *c = map_num(pers, __le32_to_cpu(sb->level));
610
611 nm = strchr(sb->set_name, ':');
612 if (nm)
613 nm++;
614 else if (sb->set_name[0])
615 nm = sb->set_name;
616 else
617 nm = NULL;
618
619 printf("ARRAY ");
620 if (nm) {
621 printf("/dev/md/");
622 print_escape(nm);
623 putchar(' ');
624 }
625 if (verbose && c)
626 printf(" level=%s", c);
627 sb_offset = __le64_to_cpu(sb->super_offset);
628 if (sb_offset <= 4)
629 printf(" metadata=1.1 ");
630 else if (sb_offset <= 8)
631 printf(" metadata=1.2 ");
632 else
633 printf(" metadata=1.0 ");
634 if (verbose)
635 printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks));
636 printf("UUID=");
637 for (i = 0; i < 16; i++) {
638 if ((i&3)==0 && i != 0)
639 printf(":");
640 printf("%02x", sb->set_uuid[i]);
641 }
642 if (sb->set_name[0]) {
643 printf(" name=");
644 print_quoted(sb->set_name);
645 }
646 printf("\n");
647 }
648
649 static void export_examine_super1(struct supertype *st)
650 {
651 struct mdp_superblock_1 *sb = st->sb;
652 int i;
653 int len = 32;
654 int layout;
655
656 printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level)));
657 printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks));
658 for (i = 0; i < 32; i++)
659 if (sb->set_name[i] == '\n' || sb->set_name[i] == '\0') {
660 len = i;
661 break;
662 }
663 if (len)
664 printf("MD_NAME=%.*s\n", len, sb->set_name);
665 if (__le32_to_cpu(sb->level) > 0) {
666 int ddsks = 0, ddsks_denom = 1;
667 switch(__le32_to_cpu(sb->level)) {
668 case 1:
669 ddsks = 1;
670 break;
671 case 4:
672 case 5:
673 ddsks = __le32_to_cpu(sb->raid_disks)-1;
674 break;
675 case 6:
676 ddsks = __le32_to_cpu(sb->raid_disks)-2;
677 break;
678 case 10:
679 layout = __le32_to_cpu(sb->layout);
680 ddsks = __le32_to_cpu(sb->raid_disks);
681 ddsks_denom = (layout&255) * ((layout>>8)&255);
682 }
683 if (ddsks) {
684 long long asize = __le64_to_cpu(sb->size);
685 asize = (asize << 9) * ddsks / ddsks_denom;
686 printf("MD_ARRAY_SIZE=%s\n",
687 human_size_brief(asize, JEDEC));
688 }
689 }
690 printf("MD_UUID=");
691 for (i = 0; i < 16; i++) {
692 if ((i&3) == 0 && i != 0)
693 printf(":");
694 printf("%02x", sb->set_uuid[i]);
695 }
696 printf("\n");
697 printf("MD_UPDATE_TIME=%llu\n",
698 __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL);
699 printf("MD_DEV_UUID=");
700 for (i = 0; i < 16; i++) {
701 if ((i&3) == 0 && i != 0)
702 printf(":");
703 printf("%02x", sb->device_uuid[i]);
704 }
705 printf("\n");
706 printf("MD_EVENTS=%llu\n",
707 (unsigned long long)__le64_to_cpu(sb->events));
708 }
709
710 static int copy_metadata1(struct supertype *st, int from, int to)
711 {
712 /* Read superblock. If it looks good, write it out.
713 * Then if a bitmap is present, copy that.
714 * And if a bad-block-list is present, copy that too.
715 */
716 void *buf;
717 unsigned long long dsize, sb_offset;
718 const int bufsize = 4*1024;
719 struct mdp_superblock_1 super, *sb;
720
721 if (posix_memalign(&buf, 4096, bufsize) != 0)
722 return 1;
723
724 if (!get_dev_size(from, NULL, &dsize))
725 goto err;
726
727 dsize >>= 9;
728 if (dsize < 24)
729 goto err;
730 switch(st->minor_version) {
731 case 0:
732 sb_offset = dsize;
733 sb_offset -= 8*2;
734 sb_offset &= ~(4*2-1);
735 break;
736 case 1:
737 sb_offset = 0;
738 break;
739 case 2:
740 sb_offset = 4*2;
741 break;
742 default:
743 goto err;
744 }
745
746 if (lseek64(from, sb_offset << 9, 0) < 0LL)
747 goto err;
748 if (read(from, buf, bufsize) != bufsize)
749 goto err;
750
751 sb = buf;
752 super = *sb; // save most of sb for when we reuse buf
753
754 if (__le32_to_cpu(super.magic) != MD_SB_MAGIC ||
755 __le32_to_cpu(super.major_version) != 1 ||
756 __le64_to_cpu(super.super_offset) != sb_offset ||
757 calc_sb_1_csum(sb) != super.sb_csum)
758 goto err;
759
760 if (lseek64(to, sb_offset << 9, 0) < 0LL)
761 goto err;
762 if (write(to, buf, bufsize) != bufsize)
763 goto err;
764
765 if (super.feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) {
766 unsigned long long bitmap_offset = sb_offset;
767 int bytes = 4096; // just an estimate.
768 int written = 0;
769 struct align_fd afrom, ato;
770
771 init_afd(&afrom, from);
772 init_afd(&ato, to);
773
774 bitmap_offset += (int32_t)__le32_to_cpu(super.bitmap_offset);
775
776 if (lseek64(from, bitmap_offset<<9, 0) < 0)
777 goto err;
778 if (lseek64(to, bitmap_offset<<9, 0) < 0)
779 goto err;
780
781 for (written = 0; written < bytes ; ) {
782 int n = bytes - written;
783 if (n > 4096)
784 n = 4096;
785 if (aread(&afrom, buf, n) != n)
786 goto err;
787 if (written == 0) {
788 /* have the header, can calculate
789 * correct bitmap bytes */
790 bitmap_super_t *bms;
791 bms = (void*)buf;
792 bytes = calc_bitmap_size(bms, 512);
793 if (n > bytes)
794 n = bytes;
795 }
796 if (awrite(&ato, buf, n) != n)
797 goto err;
798 written += n;
799 }
800 }
801
802 if (super.bblog_size != 0 &&
803 __le16_to_cpu(super.bblog_size) <= 100 &&
804 super.bblog_offset != 0 &&
805 (super.feature_map & __le32_to_cpu(MD_FEATURE_BAD_BLOCKS))) {
806 /* There is a bad block log */
807 unsigned long long bb_offset = sb_offset;
808 int bytes = __le16_to_cpu(super.bblog_size) * 512;
809 int written = 0;
810 struct align_fd afrom, ato;
811
812 init_afd(&afrom, from);
813 init_afd(&ato, to);
814
815 bb_offset += (int32_t)__le32_to_cpu(super.bblog_offset);
816
817 if (lseek64(from, bb_offset<<9, 0) < 0)
818 goto err;
819 if (lseek64(to, bb_offset<<9, 0) < 0)
820 goto err;
821
822 for (written = 0; written < bytes ; ) {
823 int n = bytes - written;
824 if (n > 4096)
825 n = 4096;
826 if (aread(&afrom, buf, n) != n)
827 goto err;
828
829 if (awrite(&ato, buf, n) != n)
830 goto err;
831 written += n;
832 }
833 }
834
835 free(buf);
836 return 0;
837
838 err:
839 free(buf);
840 return 1;
841 }
842
843 static void detail_super1(struct supertype *st, char *homehost, char *subarray)
844 {
845 struct mdp_superblock_1 *sb = st->sb;
846 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE);
847 int i;
848 int l = homehost ? strlen(homehost) : 0;
849
850 printf(" Name : %.32s", sb->set_name);
851 if (l > 0 && l < 32 && sb->set_name[l] == ':' &&
852 strncmp(sb->set_name, homehost, l) == 0)
853 printf(" (local to host %s)", homehost);
854 if (bms->nodes > 0 &&
855 (__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET))
856 printf("\n Cluster Name : %-64s", bms->cluster_name);
857 printf("\n UUID : ");
858 for (i = 0; i < 16; i++) {
859 if ((i&3) == 0 && i != 0)
860 printf(":");
861 printf("%02x", sb->set_uuid[i]);
862 }
863 printf("\n Events : %llu\n\n",
864 (unsigned long long)__le64_to_cpu(sb->events));
865 }
866
867 static void brief_detail_super1(struct supertype *st, char *subarray)
868 {
869 struct mdp_superblock_1 *sb = st->sb;
870 int i;
871
872 if (sb->set_name[0]) {
873 printf(" name=");
874 print_quoted(sb->set_name);
875 }
876 printf(" UUID=");
877 for (i = 0; i < 16; i++) {
878 if ((i & 3) == 0 && i != 0)
879 printf(":");
880 printf("%02x", sb->set_uuid[i]);
881 }
882 }
883
884 static void export_detail_super1(struct supertype *st)
885 {
886 struct mdp_superblock_1 *sb = st->sb;
887 int i;
888 int len = 32;
889
890 for (i = 0; i < 32; i++)
891 if (sb->set_name[i] == '\n' || sb->set_name[i] == '\0') {
892 len = i;
893 break;
894 }
895 if (len)
896 printf("MD_NAME=%.*s\n", len, sb->set_name);
897 }
898
899 static int examine_badblocks_super1(struct supertype *st, int fd, char *devname)
900 {
901 struct mdp_superblock_1 *sb = st->sb;
902 unsigned long long offset;
903 int size;
904 __u64 *bbl, *bbp;
905 int i;
906
907 if (!sb->bblog_size || __le16_to_cpu(sb->bblog_size) > 100 ||
908 !sb->bblog_offset){
909 printf("No bad-blocks list configured on %s\n", devname);
910 return 0;
911 }
912 if ((sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS)) == 0) {
913 printf("Bad-blocks list is empty in %s\n", devname);
914 return 0;
915 }
916
917 size = __le16_to_cpu(sb->bblog_size)* 512;
918 if (posix_memalign((void**)&bbl, 4096, size) != 0) {
919 pr_err("could not allocate badblocks list\n");
920 return 0;
921 }
922 offset = __le64_to_cpu(sb->super_offset) +
923 (int)__le32_to_cpu(sb->bblog_offset);
924 offset <<= 9;
925 if (lseek64(fd, offset, 0) < 0) {
926 pr_err("Cannot seek to bad-blocks list\n");
927 return 1;
928 }
929 if (read(fd, bbl, size) != size) {
930 pr_err("Cannot read bad-blocks list\n");
931 return 1;
932 }
933 /* 64bits per entry. 10 bits is block-count, 54 bits is block
934 * offset. Blocks are sectors unless bblog->shift makes them bigger
935 */
936 bbp = (__u64*)bbl;
937 printf("Bad-blocks on %s:\n", devname);
938 for (i = 0; i < size/8; i++, bbp++) {
939 __u64 bb = __le64_to_cpu(*bbp);
940 int count = bb & 0x3ff;
941 unsigned long long sector = bb >> 10;
942
943 if (bb + 1 == 0)
944 break;
945
946 sector <<= sb->bblog_shift;
947 count <<= sb->bblog_shift;
948
949 printf("%20llu for %d sectors\n", sector, count);
950 }
951 return 0;
952 }
953
954 static int match_home1(struct supertype *st, char *homehost)
955 {
956 struct mdp_superblock_1 *sb = st->sb;
957 int l = homehost ? strlen(homehost) : 0;
958
959 return (l > 0 && l < 32 && sb->set_name[l] == ':' &&
960 strncmp(sb->set_name, homehost, l) == 0);
961 }
962
963 static void uuid_from_super1(struct supertype *st, int uuid[4])
964 {
965 struct mdp_superblock_1 *super = st->sb;
966 char *cuuid = (char*)uuid;
967 int i;
968 for (i = 0; i < 16; i++)
969 cuuid[i] = super->set_uuid[i];
970 }
971
972 static void getinfo_super1(struct supertype *st, struct mdinfo *info, char *map)
973 {
974 struct mdp_superblock_1 *sb = st->sb;
975 struct bitmap_super_s *bsb = (void*)(((char*)sb)+MAX_SB_SIZE);
976 struct misc_dev_info *misc =
977 (void*)(((char*)sb)+MAX_SB_SIZE+BM_SUPER_SIZE);
978 int working = 0;
979 unsigned int i;
980 unsigned int role;
981 unsigned int map_disks = info->array.raid_disks;
982 unsigned long long super_offset;
983 unsigned long long data_size;
984
985 memset(info, 0, sizeof(*info));
986 info->array.major_version = 1;
987 info->array.minor_version = st->minor_version;
988 info->array.patch_version = 0;
989 info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
990 info->array.level = __le32_to_cpu(sb->level);
991 info->array.layout = __le32_to_cpu(sb->layout);
992 info->array.md_minor = -1;
993 info->array.ctime = __le64_to_cpu(sb->ctime);
994 info->array.utime = __le64_to_cpu(sb->utime);
995 info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
996 info->array.state =
997 (__le64_to_cpu(sb->resync_offset) == MaxSector) ? 1 : 0;
998
999 super_offset = __le64_to_cpu(sb->super_offset);
1000 info->data_offset = __le64_to_cpu(sb->data_offset);
1001 info->component_size = __le64_to_cpu(sb->size);
1002 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) {
1003 info->bitmap_offset = (int32_t)__le32_to_cpu(sb->bitmap_offset);
1004 if (__le32_to_cpu(bsb->nodes) > 1)
1005 info->array.state |= (1 << MD_SB_CLUSTERED);
1006 } else if (md_feature_any_ppl_on(sb->feature_map)) {
1007 info->ppl_offset = __le16_to_cpu(sb->ppl.offset);
1008 info->ppl_size = __le16_to_cpu(sb->ppl.size);
1009 info->ppl_sector = super_offset + info->ppl_offset;
1010 }
1011
1012 info->disk.major = 0;
1013 info->disk.minor = 0;
1014 info->disk.number = __le32_to_cpu(sb->dev_number);
1015 if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
1016 __le32_to_cpu(sb->dev_number) >= MAX_DEVS)
1017 role = MD_DISK_ROLE_FAULTY;
1018 else
1019 role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
1020
1021 if (info->array.level <= 0)
1022 data_size = __le64_to_cpu(sb->data_size);
1023 else
1024 data_size = __le64_to_cpu(sb->size);
1025 if (info->data_offset < super_offset) {
1026 unsigned long long end;
1027 info->space_before = info->data_offset;
1028 end = super_offset;
1029
1030 if (sb->bblog_offset && sb->bblog_size) {
1031 unsigned long long bboffset = super_offset;
1032 bboffset += (int32_t)__le32_to_cpu(sb->bblog_offset);
1033 if (bboffset < end)
1034 end = bboffset;
1035 }
1036
1037 if (super_offset + info->bitmap_offset + info->ppl_offset < end)
1038 end = super_offset + info->bitmap_offset +
1039 info->ppl_offset;
1040
1041 if (info->data_offset + data_size < end)
1042 info->space_after = end - data_size - info->data_offset;
1043 else
1044 info->space_after = 0;
1045 } else {
1046 unsigned long long earliest;
1047 earliest = super_offset + (32+4)*2; /* match kernel */
1048 if (info->bitmap_offset > 0) {
1049 unsigned long long bmend = info->bitmap_offset;
1050 unsigned long long size = calc_bitmap_size(bsb, 4096);
1051 size /= 512;
1052 bmend += size;
1053 if (bmend > earliest)
1054 earliest = bmend;
1055 } else if (info->ppl_offset > 0) {
1056 unsigned long long pplend;
1057
1058 pplend = info->ppl_offset + info->ppl_size;
1059 if (pplend > earliest)
1060 earliest = pplend;
1061 }
1062 if (sb->bblog_offset && sb->bblog_size) {
1063 unsigned long long bbend = super_offset;
1064 bbend += (int32_t)__le32_to_cpu(sb->bblog_offset);
1065 bbend += __le16_to_cpu(sb->bblog_size);
1066 if (bbend > earliest)
1067 earliest = bbend;
1068 }
1069 if (earliest < info->data_offset)
1070 info->space_before = info->data_offset - earliest;
1071 else
1072 info->space_before = 0;
1073 info->space_after = misc->device_size - data_size -
1074 info->data_offset;
1075 }
1076 if (info->space_before == 0 && info->space_after == 0) {
1077 /* It will look like we don't support data_offset changes,
1078 * be we do - it's just that there is no room.
1079 * A change that reduced the number of devices should
1080 * still be allowed, so set the otherwise useless value of '1'
1081 */
1082 info->space_after = 1;
1083 }
1084
1085 info->disk.raid_disk = -1;
1086 switch(role) {
1087 case MD_DISK_ROLE_SPARE:
1088 /* spare: not active, not sync, not faulty */
1089 info->disk.state = 0;
1090 break;
1091 case MD_DISK_ROLE_FAULTY:
1092 info->disk.state = (1 << MD_DISK_FAULTY); /* faulty */
1093 break;
1094 case MD_DISK_ROLE_JOURNAL:
1095 info->disk.state = (1 << MD_DISK_JOURNAL);
1096 info->disk.raid_disk = role;
1097 /* journal uses all 4kB blocks*/
1098 info->space_after = (misc->device_size - info->data_offset) % 8;
1099 break;
1100 default:
1101 info->disk.state = 6; /* active and in sync */
1102 info->disk.raid_disk = role;
1103 }
1104 if (sb->devflags & WriteMostly1)
1105 info->disk.state |= (1 << MD_DISK_WRITEMOSTLY);
1106 if (sb->devflags & FailFast1)
1107 info->disk.state |= (1 << MD_DISK_FAILFAST);
1108 info->events = __le64_to_cpu(sb->events);
1109 sprintf(info->text_version, "1.%d", st->minor_version);
1110 info->safe_mode_delay = 200;
1111
1112 memcpy(info->uuid, sb->set_uuid, 16);
1113
1114 strncpy(info->name, sb->set_name, 32);
1115 info->name[32] = 0;
1116
1117 if ((__le32_to_cpu(sb->feature_map)&MD_FEATURE_REPLACEMENT)) {
1118 info->disk.state &= ~(1 << MD_DISK_SYNC);
1119 info->disk.state |= 1 << MD_DISK_REPLACEMENT;
1120 }
1121
1122 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET))
1123 info->recovery_start = __le32_to_cpu(sb->recovery_offset);
1124 else
1125 info->recovery_start = MaxSector;
1126
1127 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
1128 info->reshape_active = 1;
1129 if ((sb->feature_map & __le32_to_cpu(MD_FEATURE_NEW_OFFSET)) &&
1130 sb->new_offset != 0)
1131 info->reshape_active |= RESHAPE_NO_BACKUP;
1132 info->reshape_progress = __le64_to_cpu(sb->reshape_position);
1133 info->new_level = __le32_to_cpu(sb->new_level);
1134 info->delta_disks = __le32_to_cpu(sb->delta_disks);
1135 info->new_layout = __le32_to_cpu(sb->new_layout);
1136 info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
1137 if (info->delta_disks < 0)
1138 info->array.raid_disks -= info->delta_disks;
1139 } else
1140 info->reshape_active = 0;
1141
1142 info->recovery_blocked = info->reshape_active;
1143
1144 if (map)
1145 for (i=0; i<map_disks; i++)
1146 map[i] = 0;
1147 for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) {
1148 role = __le16_to_cpu(sb->dev_roles[i]);
1149 if (/*role == MD_DISK_ROLE_SPARE || */role < (unsigned) info->array.raid_disks) {
1150 working++;
1151 if (map && role < map_disks)
1152 map[role] = 1;
1153 }
1154 }
1155
1156 info->array.working_disks = working;
1157
1158 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_JOURNAL)) {
1159 info->journal_device_required = 1;
1160 info->consistency_policy = CONSISTENCY_POLICY_JOURNAL;
1161 } else if (md_feature_any_ppl_on(sb->feature_map)) {
1162 info->consistency_policy = CONSISTENCY_POLICY_PPL;
1163 } else if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) {
1164 info->consistency_policy = CONSISTENCY_POLICY_BITMAP;
1165 } else if (info->array.level <= 0) {
1166 info->consistency_policy = CONSISTENCY_POLICY_NONE;
1167 } else {
1168 info->consistency_policy = CONSISTENCY_POLICY_RESYNC;
1169 }
1170
1171 info->journal_clean = 0;
1172 }
1173
1174 static struct mdinfo *container_content1(struct supertype *st, char *subarray)
1175 {
1176 struct mdinfo *info;
1177
1178 if (subarray)
1179 return NULL;
1180
1181 info = xmalloc(sizeof(*info));
1182 getinfo_super1(st, info, NULL);
1183 return info;
1184 }
1185
1186 static int update_super1(struct supertype *st, struct mdinfo *info,
1187 char *update, char *devname, int verbose,
1188 int uuid_set, char *homehost)
1189 {
1190 /* NOTE: for 'assemble' and 'force' we need to return non-zero
1191 * if any change was made. For others, the return value is
1192 * ignored.
1193 */
1194 int rv = 0;
1195 struct mdp_superblock_1 *sb = st->sb;
1196 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE);
1197
1198 if (strcmp(update, "homehost") == 0 &&
1199 homehost) {
1200 /* Note that 'homehost' is special as it is really
1201 * a "name" update.
1202 */
1203 char *c;
1204 update = "name";
1205 c = strchr(sb->set_name, ':');
1206 if (c)
1207 strncpy(info->name, c+1, 31 - (c-sb->set_name));
1208 else
1209 strncpy(info->name, sb->set_name, 32);
1210 info->name[32] = 0;
1211 }
1212
1213 if (strcmp(update, "force-one")==0) {
1214 /* Not enough devices for a working array,
1215 * so bring this one up-to-date
1216 */
1217 if (sb->events != __cpu_to_le64(info->events))
1218 rv = 1;
1219 sb->events = __cpu_to_le64(info->events);
1220 } else if (strcmp(update, "force-array")==0) {
1221 /* Degraded array and 'force' requests to
1222 * maybe need to mark it 'clean'.
1223 */
1224 switch(__le32_to_cpu(sb->level)) {
1225 case 4:
1226 case 5:
1227 case 6:
1228 /* need to force clean */
1229 if (sb->resync_offset != MaxSector)
1230 rv = 1;
1231 sb->resync_offset = MaxSector;
1232 }
1233 } else if (strcmp(update, "assemble")==0) {
1234 int d = info->disk.number;
1235 int want;
1236 if (info->disk.state & (1<<MD_DISK_ACTIVE))
1237 want = info->disk.raid_disk;
1238 else if (info->disk.state & (1<<MD_DISK_JOURNAL))
1239 want = MD_DISK_ROLE_JOURNAL;
1240 else
1241 want = MD_DISK_ROLE_SPARE;
1242 if (sb->dev_roles[d] != __cpu_to_le16(want)) {
1243 sb->dev_roles[d] = __cpu_to_le16(want);
1244 rv = 1;
1245 }
1246 if (info->reshape_active &&
1247 sb->feature_map &
1248 __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) &&
1249 info->delta_disks >= 0 &&
1250 info->reshape_progress <
1251 __le64_to_cpu(sb->reshape_position)) {
1252 sb->reshape_position =
1253 __cpu_to_le64(info->reshape_progress);
1254 rv = 1;
1255 }
1256 if (info->reshape_active &&
1257 sb->feature_map &
1258 __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) &&
1259 info->delta_disks < 0 &&
1260 info->reshape_progress >
1261 __le64_to_cpu(sb->reshape_position)) {
1262 sb->reshape_position =
1263 __cpu_to_le64(info->reshape_progress);
1264 rv = 1;
1265 }
1266 } else if (strcmp(update, "linear-grow-new") == 0) {
1267 unsigned int i;
1268 int fd;
1269 unsigned int max = __le32_to_cpu(sb->max_dev);
1270
1271 for (i = 0; i < max; i++)
1272 if (__le16_to_cpu(sb->dev_roles[i]) >=
1273 MD_DISK_ROLE_FAULTY)
1274 break;
1275 sb->dev_number = __cpu_to_le32(i);
1276 info->disk.number = i;
1277 if (i >= max) {
1278 sb->max_dev = __cpu_to_le32(max+1);
1279 }
1280
1281 random_uuid(sb->device_uuid);
1282
1283 sb->dev_roles[i] = __cpu_to_le16(info->disk.raid_disk);
1284
1285 fd = open(devname, O_RDONLY);
1286 if (fd >= 0) {
1287 unsigned long long ds;
1288 get_dev_size(fd, devname, &ds);
1289 close(fd);
1290 ds >>= 9;
1291 if (__le64_to_cpu(sb->super_offset) <
1292 __le64_to_cpu(sb->data_offset)) {
1293 sb->data_size = __cpu_to_le64(
1294 ds - __le64_to_cpu(sb->data_offset));
1295 } else {
1296 ds -= 8*2;
1297 ds &= ~(unsigned long long)(4*2-1);
1298 sb->super_offset = __cpu_to_le64(ds);
1299 sb->data_size = __cpu_to_le64(
1300 ds - __le64_to_cpu(sb->data_offset));
1301 }
1302 }
1303 } else if (strcmp(update, "linear-grow-update") == 0) {
1304 int max = __le32_to_cpu(sb->max_dev);
1305 sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
1306 if (info->array.raid_disks > max) {
1307 sb->max_dev = __cpu_to_le32(max+1);
1308 }
1309 sb->dev_roles[info->disk.number] =
1310 __cpu_to_le16(info->disk.raid_disk);
1311 } else if (strcmp(update, "resync") == 0) {
1312 /* make sure resync happens */
1313 sb->resync_offset = 0ULL;
1314 } else if (strcmp(update, "uuid") == 0) {
1315 copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
1316
1317 if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)
1318 memcpy(bms->uuid, sb->set_uuid, 16);
1319 } else if (strcmp(update, "no-bitmap") == 0) {
1320 sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);
1321 } else if (strcmp(update, "bbl") == 0) {
1322 /* only possible if there is room after the bitmap, or if
1323 * there is no bitmap
1324 */
1325 unsigned long long sb_offset = __le64_to_cpu(sb->super_offset);
1326 unsigned long long data_offset = __le64_to_cpu(sb->data_offset);
1327 long bitmap_offset = 0;
1328 long bm_sectors = 0;
1329 long space;
1330
1331 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
1332 bitmap_offset = (long)__le32_to_cpu(sb->bitmap_offset);
1333 bm_sectors = calc_bitmap_size(bms, 4096) >> 9;
1334 } else if (md_feature_any_ppl_on(sb->feature_map)) {
1335 bitmap_offset = (long)__le16_to_cpu(sb->ppl.offset);
1336 bm_sectors = (long)__le16_to_cpu(sb->ppl.size);
1337 }
1338
1339 if (sb_offset < data_offset) {
1340 /*
1341 * 1.1 or 1.2. Put bbl after bitmap leaving
1342 * at least 32K
1343 */
1344 long bb_offset;
1345 bb_offset = sb_offset + 8;
1346 if (bm_sectors && bitmap_offset > 0)
1347 bb_offset = bitmap_offset + bm_sectors;
1348 while (bb_offset < (long)sb_offset + 8 + 32*2 &&
1349 bb_offset + 8+8 <= (long)data_offset)
1350 /* too close to bitmap, and room to grow */
1351 bb_offset += 8;
1352 if (bb_offset + 8 <= (long)data_offset) {
1353 sb->bblog_size = __cpu_to_le16(8);
1354 sb->bblog_offset = __cpu_to_le32(bb_offset);
1355 }
1356 } else {
1357 /* 1.0 - Put bbl just before super block */
1358 if (bm_sectors && bitmap_offset < 0)
1359 space = -bitmap_offset - bm_sectors;
1360 else
1361 space = sb_offset - data_offset -
1362 __le64_to_cpu(sb->data_size);
1363 if (space >= 8) {
1364 sb->bblog_size = __cpu_to_le16(8);
1365 sb->bblog_offset = __cpu_to_le32((unsigned)-8);
1366 }
1367 }
1368 } else if (strcmp(update, "no-bbl") == 0) {
1369 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS))
1370 pr_err("Cannot remove active bbl from %s\n",devname);
1371 else {
1372 sb->bblog_size = 0;
1373 sb->bblog_shift = 0;
1374 sb->bblog_offset = 0;
1375 }
1376 } else if (strcmp(update, "force-no-bbl") == 0) {
1377 sb->feature_map &= ~ __cpu_to_le32(MD_FEATURE_BAD_BLOCKS);
1378 sb->bblog_size = 0;
1379 sb->bblog_shift = 0;
1380 sb->bblog_offset = 0;
1381 } else if (strcmp(update, "ppl") == 0) {
1382 unsigned long long sb_offset = __le64_to_cpu(sb->super_offset);
1383 unsigned long long data_offset = __le64_to_cpu(sb->data_offset);
1384 unsigned long long data_size = __le64_to_cpu(sb->data_size);
1385 long bb_offset = __le32_to_cpu(sb->bblog_offset);
1386 int space;
1387 int offset;
1388
1389 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
1390 pr_err("Cannot add PPL to array with bitmap\n");
1391 return -2;
1392 }
1393
1394 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_JOURNAL)) {
1395 pr_err("Cannot add PPL to array with journal\n");
1396 return -2;
1397 }
1398
1399 if (sb_offset < data_offset) {
1400 if (bb_offset)
1401 space = bb_offset - 8;
1402 else
1403 space = data_offset - sb_offset - 8;
1404 offset = 8;
1405 } else {
1406 offset = -(sb_offset - data_offset - data_size);
1407 if (offset < INT16_MIN)
1408 offset = INT16_MIN;
1409 space = -(offset - bb_offset);
1410 }
1411
1412 if (space < (PPL_HEADER_SIZE >> 9) + 8) {
1413 pr_err("Not enough space to add ppl\n");
1414 return -2;
1415 }
1416
1417 if (space >= (MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9)) {
1418 space = (MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9);
1419 } else {
1420 int optimal_space = choose_ppl_space(
1421 __le32_to_cpu(sb->chunksize));
1422 if (space > optimal_space)
1423 space = optimal_space;
1424 if (space > UINT16_MAX)
1425 space = UINT16_MAX;
1426 }
1427
1428 sb->ppl.offset = __cpu_to_le16(offset);
1429 sb->ppl.size = __cpu_to_le16(space);
1430 sb->feature_map |= __cpu_to_le32(MD_FEATURE_PPL);
1431 } else if (strcmp(update, "no-ppl") == 0) {
1432 sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_PPL |
1433 MD_FEATURE_MUTLIPLE_PPLS);
1434 } else if (strcmp(update, "name") == 0) {
1435 if (info->name[0] == 0)
1436 sprintf(info->name, "%d", info->array.md_minor);
1437 memset(sb->set_name, 0, sizeof(sb->set_name));
1438 if (homehost &&
1439 strchr(info->name, ':') == NULL &&
1440 strlen(homehost)+1+strlen(info->name) < 32) {
1441 strcpy(sb->set_name, homehost);
1442 strcat(sb->set_name, ":");
1443 strcat(sb->set_name, info->name);
1444 } else {
1445 int namelen;
1446
1447 namelen = min((int)strlen(info->name),
1448 (int)sizeof(sb->set_name) - 1);
1449 memcpy(sb->set_name, info->name, namelen);
1450 memset(&sb->set_name[namelen], '\0',
1451 sizeof(sb->set_name) - namelen);
1452 }
1453 } else if (strcmp(update, "devicesize") == 0 &&
1454 __le64_to_cpu(sb->super_offset) <
1455 __le64_to_cpu(sb->data_offset)) {
1456 /* set data_size to device size less data_offset */
1457 struct misc_dev_info *misc = (struct misc_dev_info*)
1458 (st->sb + MAX_SB_SIZE + BM_SUPER_SIZE);
1459 sb->data_size = __cpu_to_le64(
1460 misc->device_size - __le64_to_cpu(sb->data_offset));
1461 } else if (strncmp(update, "revert-reshape", 14) == 0) {
1462 rv = -2;
1463 if (!(sb->feature_map &
1464 __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE)))
1465 pr_err("No active reshape to revert on %s\n",
1466 devname);
1467 else {
1468 __u32 temp;
1469 unsigned long long reshape_sectors;
1470 long reshape_chunk;
1471 rv = 0;
1472 /* If the reshape hasn't started, just stop it.
1473 * It is conceivable that a stripe was modified but
1474 * the metadata not updated. In that case the backup
1475 * should have been used to get passed the critical stage.
1476 * If that couldn't happen, the "-nobackup" version
1477 * will be used.
1478 */
1479 if (strcmp(update, "revert-reshape-nobackup") == 0 &&
1480 sb->reshape_position == 0 &&
1481 (__le32_to_cpu(sb->delta_disks) > 0 ||
1482 (__le32_to_cpu(sb->delta_disks) == 0 &&
1483 !(sb->feature_map & __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS))))) {
1484 sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE);
1485 sb->raid_disks = __cpu_to_le32(__le32_to_cpu(sb->raid_disks) -
1486 __le32_to_cpu(sb->delta_disks));
1487 sb->delta_disks = 0;
1488 goto done;
1489 }
1490 /* reshape_position is a little messy.
1491 * Its value must be a multiple of the larger
1492 * chunk size, and of the "after" data disks.
1493 * So when reverting we need to change it to
1494 * be a multiple of the new "after" data disks,
1495 * which is the old "before".
1496 * If it isn't already a multiple of 'before',
1497 * the only thing we could do would be
1498 * copy some block around on the disks, which
1499 * is easy to get wrong.
1500 * So we reject a revert-reshape unless the
1501 * alignment is good.
1502 */
1503 if (__le32_to_cpu(sb->level) >= 4 &&
1504 __le32_to_cpu(sb->level) <= 6) {
1505 reshape_sectors =
1506 __le64_to_cpu(sb->reshape_position);
1507 reshape_chunk = __le32_to_cpu(sb->new_chunk);
1508 reshape_chunk *= __le32_to_cpu(sb->raid_disks) -
1509 __le32_to_cpu(sb->delta_disks) -
1510 (__le32_to_cpu(sb->level)==6 ? 2 : 1);
1511 if (reshape_sectors % reshape_chunk) {
1512 pr_err("Reshape position is not suitably aligned.\n");
1513 pr_err("Try normal assembly and stop again\n");
1514 return -2;
1515 }
1516 }
1517 sb->raid_disks =
1518 __cpu_to_le32(__le32_to_cpu(sb->raid_disks) -
1519 __le32_to_cpu(sb->delta_disks));
1520 if (sb->delta_disks == 0)
1521 sb->feature_map ^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS);
1522 else
1523 sb->delta_disks = __cpu_to_le32(-__le32_to_cpu(sb->delta_disks));
1524
1525 temp = sb->new_layout;
1526 sb->new_layout = sb->layout;
1527 sb->layout = temp;
1528
1529 temp = sb->new_chunk;
1530 sb->new_chunk = sb->chunksize;
1531 sb->chunksize = temp;
1532
1533 if (sb->feature_map &
1534 __cpu_to_le32(MD_FEATURE_NEW_OFFSET)) {
1535 long offset_delta =
1536 (int32_t)__le32_to_cpu(sb->new_offset);
1537 sb->data_offset = __cpu_to_le64(__le64_to_cpu(sb->data_offset) + offset_delta);
1538 sb->new_offset = __cpu_to_le32(-offset_delta);
1539 sb->data_size = __cpu_to_le64(__le64_to_cpu(sb->data_size) - offset_delta);
1540 }
1541 done:;
1542 }
1543 } else if (strcmp(update, "_reshape_progress") == 0)
1544 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
1545 else if (strcmp(update, "writemostly") == 0)
1546 sb->devflags |= WriteMostly1;
1547 else if (strcmp(update, "readwrite") == 0)
1548 sb->devflags &= ~WriteMostly1;
1549 else if (strcmp(update, "failfast") == 0)
1550 sb->devflags |= FailFast1;
1551 else if (strcmp(update, "nofailfast") == 0)
1552 sb->devflags &= ~FailFast1;
1553 else if (strcmp(update, "layout-original") == 0 ||
1554 strcmp(update, "layout-alternate") == 0 ||
1555 strcmp(update, "layout-unspecified") == 0) {
1556 if (__le32_to_cpu(sb->level) != 0) {
1557 pr_err("%s: %s only supported for RAID0\n",
1558 devname?:"", update);
1559 rv = -1;
1560 } else if (strcmp(update, "layout-unspecified") == 0) {
1561 sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_RAID0_LAYOUT);
1562 sb->layout = 0;
1563 } else {
1564 sb->feature_map |= __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT);
1565 sb->layout = __cpu_to_le32(update[7] == 'o' ? 1 : 2);
1566 }
1567 } else
1568 rv = -1;
1569
1570 sb->sb_csum = calc_sb_1_csum(sb);
1571
1572 return rv;
1573 }
1574
1575 static int init_super1(struct supertype *st, mdu_array_info_t *info,
1576 struct shape *s, char *name, char *homehost,
1577 int *uuid, unsigned long long data_offset)
1578 {
1579 struct mdp_superblock_1 *sb;
1580 int spares;
1581 char defname[10];
1582 int sbsize;
1583
1584 if (posix_memalign((void**)&sb, 4096, SUPER1_SIZE) != 0) {
1585 pr_err("could not allocate superblock\n");
1586 return 0;
1587 }
1588 memset(sb, 0, SUPER1_SIZE);
1589
1590 st->sb = sb;
1591 if (info == NULL) {
1592 /* zeroing superblock */
1593 return 0;
1594 }
1595
1596 spares = info->working_disks - info->active_disks;
1597 if (info->raid_disks + spares > MAX_DEVS) {
1598 pr_err("too many devices requested: %d+%d > %d\n",
1599 info->raid_disks , spares, MAX_DEVS);
1600 return 0;
1601 }
1602
1603 sb->magic = __cpu_to_le32(MD_SB_MAGIC);
1604 sb->major_version = __cpu_to_le32(1);
1605 sb->feature_map = 0;
1606 sb->pad0 = 0;
1607
1608 if (uuid)
1609 copy_uuid(sb->set_uuid, uuid, super1.swapuuid);
1610 else
1611 random_uuid(sb->set_uuid);;
1612
1613 if (name == NULL || *name == 0) {
1614 sprintf(defname, "%d", info->md_minor);
1615 name = defname;
1616 }
1617 if (homehost &&
1618 strchr(name, ':')== NULL &&
1619 strlen(homehost)+1+strlen(name) < 32) {
1620 strcpy(sb->set_name, homehost);
1621 strcat(sb->set_name, ":");
1622 strcat(sb->set_name, name);
1623 } else {
1624 int namelen;
1625
1626 namelen = min((int)strlen(name),
1627 (int)sizeof(sb->set_name) - 1);
1628 memcpy(sb->set_name, name, namelen);
1629 memset(&sb->set_name[namelen], '\0',
1630 sizeof(sb->set_name) - namelen);
1631 }
1632
1633 sb->ctime = __cpu_to_le64((unsigned long long)time(0));
1634 sb->level = __cpu_to_le32(info->level);
1635 sb->layout = __cpu_to_le32(info->layout);
1636 sb->size = __cpu_to_le64(s->size*2ULL);
1637 sb->chunksize = __cpu_to_le32(info->chunk_size>>9);
1638 sb->raid_disks = __cpu_to_le32(info->raid_disks);
1639
1640 sb->data_offset = __cpu_to_le64(data_offset);
1641 sb->data_size = __cpu_to_le64(0);
1642 sb->super_offset = __cpu_to_le64(0);
1643 sb->recovery_offset = __cpu_to_le64(0);
1644
1645 sb->utime = sb->ctime;
1646 sb->events = __cpu_to_le64(1);
1647 if (info->state & (1<<MD_SB_CLEAN))
1648 sb->resync_offset = MaxSector;
1649 else
1650 sb->resync_offset = 0;
1651 sbsize = sizeof(struct mdp_superblock_1) +
1652 2 * (info->raid_disks + spares);
1653 sbsize = ROUND_UP(sbsize, 512);
1654 sb->max_dev =
1655 __cpu_to_le32((sbsize - sizeof(struct mdp_superblock_1)) / 2);
1656
1657 memset(sb->dev_roles, 0xff,
1658 MAX_SB_SIZE - sizeof(struct mdp_superblock_1));
1659
1660 if (s->consistency_policy == CONSISTENCY_POLICY_PPL)
1661 sb->feature_map |= __cpu_to_le32(MD_FEATURE_PPL);
1662
1663 return 1;
1664 }
1665
1666 struct devinfo {
1667 int fd;
1668 char *devname;
1669 long long data_offset;
1670 unsigned long long dev_size;
1671 mdu_disk_info_t disk;
1672 struct devinfo *next;
1673 };
1674
1675 /* Add a device to the superblock being created */
1676 static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk,
1677 int fd, char *devname, unsigned long long data_offset)
1678 {
1679 struct mdp_superblock_1 *sb = st->sb;
1680 __u16 *rp = sb->dev_roles + dk->number;
1681 struct devinfo *di, **dip;
1682 int dk_state;
1683
1684 dk_state = dk->state & ~(1<<MD_DISK_FAILFAST);
1685 if ((dk_state & (1<<MD_DISK_ACTIVE)) &&
1686 (dk_state & (1<<MD_DISK_SYNC)))/* active, sync */
1687 *rp = __cpu_to_le16(dk->raid_disk);
1688 else if (dk_state & (1<<MD_DISK_JOURNAL))
1689 *rp = MD_DISK_ROLE_JOURNAL;
1690 else if ((dk_state & ~(1<<MD_DISK_ACTIVE)) == 0)
1691 /* active or idle -> spare */
1692 *rp = MD_DISK_ROLE_SPARE;
1693 else
1694 *rp = MD_DISK_ROLE_FAULTY;
1695
1696 if (dk->number >= (int)__le32_to_cpu(sb->max_dev) &&
1697 __le32_to_cpu(sb->max_dev) < MAX_DEVS)
1698 sb->max_dev = __cpu_to_le32(dk->number+1);
1699
1700 sb->dev_number = __cpu_to_le32(dk->number);
1701 sb->devflags = 0; /* don't copy another disks flags */
1702 sb->sb_csum = calc_sb_1_csum(sb);
1703
1704 dip = (struct devinfo **)&st->info;
1705 while (*dip)
1706 dip = &(*dip)->next;
1707 di = xmalloc(sizeof(struct devinfo));
1708 di->fd = fd;
1709 di->devname = devname;
1710 di->disk = *dk;
1711 di->data_offset = data_offset;
1712 get_dev_size(fd, NULL, &di->dev_size);
1713 di->next = NULL;
1714 *dip = di;
1715
1716 return 0;
1717 }
1718
1719 static int locate_bitmap1(struct supertype *st, int fd, int node_num);
1720
1721 static int store_super1(struct supertype *st, int fd)
1722 {
1723 struct mdp_superblock_1 *sb = st->sb;
1724 unsigned long long sb_offset;
1725 struct align_fd afd;
1726 int sbsize;
1727 unsigned long long dsize;
1728
1729 if (!get_dev_size(fd, NULL, &dsize))
1730 return 1;
1731
1732 dsize >>= 9;
1733
1734 if (dsize < 24)
1735 return 2;
1736
1737 init_afd(&afd, fd);
1738
1739 /*
1740 * Calculate the position of the superblock.
1741 * It is always aligned to a 4K boundary and
1742 * depending on minor_version, it can be:
1743 * 0: At least 8K, but less than 12K, from end of device
1744 * 1: At start of device
1745 * 2: 4K from start of device.
1746 */
1747 switch(st->minor_version) {
1748 case 0:
1749 sb_offset = dsize;
1750 sb_offset -= 8*2;
1751 sb_offset &= ~(4*2-1);
1752 break;
1753 case 1:
1754 sb_offset = 0;
1755 break;
1756 case 2:
1757 sb_offset = 4*2;
1758 break;
1759 default:
1760 return -EINVAL;
1761 }
1762
1763 if (sb_offset != __le64_to_cpu(sb->super_offset) &&
1764 0 != __le64_to_cpu(sb->super_offset)
1765 ) {
1766 pr_err("internal error - sb_offset is wrong\n");
1767 abort();
1768 }
1769
1770 if (lseek64(fd, sb_offset << 9, 0)< 0LL)
1771 return 3;
1772
1773 sbsize = ROUND_UP(sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev), 512);
1774
1775 if (awrite(&afd, sb, sbsize) != sbsize)
1776 return 4;
1777
1778 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
1779 struct bitmap_super_s *bm = (struct bitmap_super_s*)
1780 (((char*)sb)+MAX_SB_SIZE);
1781 if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
1782 locate_bitmap1(st, fd, 0);
1783 if (awrite(&afd, bm, sizeof(*bm)) != sizeof(*bm))
1784 return 5;
1785 }
1786 }
1787 fsync(fd);
1788
1789 return 0;
1790 }
1791
1792 static int load_super1(struct supertype *st, int fd, char *devname);
1793
1794 static unsigned long choose_bm_space(unsigned long devsize)
1795 {
1796 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
1797 * if bigger than 200Gig, save 128k
1798 * NOTE: result must be multiple of 4K else bad things happen
1799 * on 4K-sector devices.
1800 */
1801 if (devsize < 64*2)
1802 return 0;
1803 if (devsize - 64*2 >= 200*1024*1024*2)
1804 return 128*2;
1805 if (devsize - 4*2 > 8*1024*1024*2)
1806 return 64*2;
1807 return 4*2;
1808 }
1809
1810 static void free_super1(struct supertype *st);
1811
1812 __u32 crc32c_le(__u32 crc, unsigned char const *p, size_t len);
1813
1814 static int write_init_ppl1(struct supertype *st, struct mdinfo *info, int fd)
1815 {
1816 struct mdp_superblock_1 *sb = st->sb;
1817 void *buf;
1818 struct ppl_header *ppl_hdr;
1819 int ret;
1820
1821 /* first clear entire ppl space */
1822 ret = zero_disk_range(fd, info->ppl_sector, info->ppl_size);
1823 if (ret)
1824 return ret;
1825
1826 ret = posix_memalign(&buf, 4096, PPL_HEADER_SIZE);
1827 if (ret) {
1828 pr_err("Failed to allocate PPL header buffer\n");
1829 return ret;
1830 }
1831
1832 memset(buf, 0, PPL_HEADER_SIZE);
1833 ppl_hdr = buf;
1834 memset(ppl_hdr->reserved, 0xff, PPL_HDR_RESERVED);
1835 ppl_hdr->signature = __cpu_to_le32(~crc32c_le(~0, sb->set_uuid,
1836 sizeof(sb->set_uuid)));
1837 ppl_hdr->checksum = __cpu_to_le32(~crc32c_le(~0, buf, PPL_HEADER_SIZE));
1838
1839 if (lseek64(fd, info->ppl_sector * 512, SEEK_SET) < 0) {
1840 ret = errno;
1841 perror("Failed to seek to PPL header location");
1842 }
1843
1844 if (!ret && write(fd, buf, PPL_HEADER_SIZE) != PPL_HEADER_SIZE) {
1845 ret = errno;
1846 perror("Write PPL header failed");
1847 }
1848
1849 if (!ret)
1850 fsync(fd);
1851
1852 free(buf);
1853 return ret;
1854 }
1855
1856 #define META_BLOCK_SIZE 4096
1857
1858 static int write_empty_r5l_meta_block(struct supertype *st, int fd)
1859 {
1860 struct r5l_meta_block *mb;
1861 struct mdp_superblock_1 *sb = st->sb;
1862 struct align_fd afd;
1863 __u32 crc;
1864
1865 init_afd(&afd, fd);
1866
1867 if (posix_memalign((void**)&mb, 4096, META_BLOCK_SIZE) != 0) {
1868 pr_err("Could not allocate memory for the meta block.\n");
1869 return 1;
1870 }
1871
1872 memset(mb, 0, META_BLOCK_SIZE);
1873
1874 mb->magic = __cpu_to_le32(R5LOG_MAGIC);
1875 mb->version = R5LOG_VERSION;
1876 mb->meta_size = __cpu_to_le32(sizeof(struct r5l_meta_block));
1877 mb->seq = __cpu_to_le64(random32());
1878 mb->position = __cpu_to_le64(0);
1879
1880 crc = crc32c_le(0xffffffff, sb->set_uuid, sizeof(sb->set_uuid));
1881 crc = crc32c_le(crc, (void *)mb, META_BLOCK_SIZE);
1882 mb->checksum = crc;
1883
1884 if (lseek64(fd, __le64_to_cpu(sb->data_offset) * 512, 0) < 0LL) {
1885 pr_err("cannot seek to offset of the meta block\n");
1886 goto fail_to_write;
1887 }
1888
1889 if (awrite(&afd, mb, META_BLOCK_SIZE) != META_BLOCK_SIZE) {
1890 pr_err("failed to store write the meta block \n");
1891 goto fail_to_write;
1892 }
1893 fsync(fd);
1894
1895 free(mb);
1896 return 0;
1897
1898 fail_to_write:
1899 free(mb);
1900 return 1;
1901 }
1902
1903 static int write_init_super1(struct supertype *st)
1904 {
1905 struct mdp_superblock_1 *sb = st->sb;
1906 struct supertype *refst;
1907 int rv = 0;
1908 unsigned long long bm_space;
1909 struct devinfo *di;
1910 unsigned long long dsize, array_size;
1911 unsigned long long sb_offset;
1912 unsigned long long data_offset;
1913 long bm_offset;
1914 int raid0_need_layout = 0;
1915
1916 for (di = st->info; di; di = di->next) {
1917 if (di->disk.state & (1 << MD_DISK_JOURNAL))
1918 sb->feature_map |= __cpu_to_le32(MD_FEATURE_JOURNAL);
1919 if (sb->level == 0 && sb->layout != 0) {
1920 struct devinfo *di2 = st->info;
1921 unsigned long long s1, s2;
1922 s1 = di->dev_size;
1923 if (di->data_offset != INVALID_SECTORS)
1924 s1 -= di->data_offset;
1925 s1 /= __le32_to_cpu(sb->chunksize);
1926 s2 = di2->dev_size;
1927 if (di2->data_offset != INVALID_SECTORS)
1928 s2 -= di2->data_offset;
1929 s2 /= __le32_to_cpu(sb->chunksize);
1930 if (s1 != s2)
1931 raid0_need_layout = 1;
1932 }
1933 }
1934
1935 for (di = st->info; di; di = di->next) {
1936 if (di->disk.state & (1 << MD_DISK_FAULTY))
1937 continue;
1938 if (di->fd < 0)
1939 continue;
1940
1941 while (Kill(di->devname, NULL, 0, -1, 1) == 0)
1942 ;
1943
1944 sb->dev_number = __cpu_to_le32(di->disk.number);
1945 if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY))
1946 sb->devflags |= WriteMostly1;
1947 else
1948 sb->devflags &= ~WriteMostly1;
1949 if (di->disk.state & (1<<MD_DISK_FAILFAST))
1950 sb->devflags |= FailFast1;
1951 else
1952 sb->devflags &= ~FailFast1;
1953
1954 random_uuid(sb->device_uuid);
1955
1956 if (!(di->disk.state & (1<<MD_DISK_JOURNAL)))
1957 sb->events = 0;
1958
1959 refst = dup_super(st);
1960 if (load_super1(refst, di->fd, NULL)==0) {
1961 struct mdp_superblock_1 *refsb = refst->sb;
1962
1963 memcpy(sb->device_uuid, refsb->device_uuid, 16);
1964 if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
1965 /* same array, so preserve events and
1966 * dev_number */
1967 sb->events = refsb->events;
1968 /* bugs in 2.6.17 and earlier mean the
1969 * dev_number chosen in Manage must be preserved
1970 */
1971 if (get_linux_version() >= 2006018)
1972 sb->dev_number = refsb->dev_number;
1973 }
1974 free_super1(refst);
1975 }
1976 free(refst);
1977
1978 if (!get_dev_size(di->fd, NULL, &dsize)) {
1979 rv = 1;
1980 goto error_out;
1981 }
1982 dsize >>= 9;
1983
1984 if (dsize < 24) {
1985 close(di->fd);
1986 rv = 2;
1987 goto error_out;
1988 }
1989
1990 /*
1991 * Calculate the position of the superblock.
1992 * It is always aligned to a 4K boundary and
1993 * depending on minor_version, it can be:
1994 * 0: At least 8K, but less than 12K, from end of device
1995 * 1: At start of device
1996 * 2: 4K from start of device.
1997 * data_offset has already been set.
1998 */
1999 array_size = __le64_to_cpu(sb->size);
2000
2001 /* work out how much space we left for a bitmap */
2002 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
2003 bitmap_super_t *bms = (bitmap_super_t *)
2004 (((char *)sb) + MAX_SB_SIZE);
2005 bm_space = calc_bitmap_size(bms, 4096) >> 9;
2006 bm_offset = (long)__le32_to_cpu(sb->bitmap_offset);
2007 } else if (md_feature_any_ppl_on(sb->feature_map)) {
2008 bm_space = MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9;
2009 if (st->minor_version == 0)
2010 bm_offset = -bm_space - 8;
2011 else
2012 bm_offset = 8;
2013 sb->ppl.offset = __cpu_to_le16(bm_offset);
2014 sb->ppl.size = __cpu_to_le16(bm_space);
2015 } else {
2016 bm_space = choose_bm_space(array_size);
2017 bm_offset = 8;
2018 }
2019
2020 data_offset = di->data_offset;
2021 if (data_offset == INVALID_SECTORS)
2022 data_offset = st->data_offset;
2023 switch(st->minor_version) {
2024 case 0:
2025 /* Add 8 sectors for bad block log */
2026 bm_space += 8;
2027 if (data_offset == INVALID_SECTORS)
2028 data_offset = 0;
2029 sb_offset = dsize;
2030 sb_offset -= 8*2;
2031 sb_offset &= ~(4*2-1);
2032 sb->data_offset = __cpu_to_le64(data_offset);
2033 sb->super_offset = __cpu_to_le64(sb_offset);
2034 if (sb_offset < array_size + bm_space)
2035 bm_space = sb_offset - array_size;
2036 sb->data_size = __cpu_to_le64(sb_offset - bm_space);
2037 if (bm_space >= 8) {
2038 sb->bblog_size = __cpu_to_le16(8);
2039 sb->bblog_offset = __cpu_to_le32((unsigned)-8);
2040 }
2041 break;
2042 case 1:
2043 case 2:
2044 sb_offset = st->minor_version == 2 ? 8 : 0;
2045 sb->super_offset = __cpu_to_le64(sb_offset);
2046 if (data_offset == INVALID_SECTORS)
2047 data_offset = sb_offset + 16;
2048
2049 sb->data_offset = __cpu_to_le64(data_offset);
2050 sb->data_size = __cpu_to_le64(dsize - data_offset);
2051 if (data_offset >= sb_offset+bm_offset+bm_space+8) {
2052 sb->bblog_size = __cpu_to_le16(8);
2053 sb->bblog_offset = __cpu_to_le32(bm_offset +
2054 bm_space);
2055 } else if (data_offset >= sb_offset + 16) {
2056 sb->bblog_size = __cpu_to_le16(8);
2057 /* '8' sectors for the bblog, and 'sb_offset'
2058 * because we want offset from superblock, not
2059 * start of device.
2060 */
2061 sb->bblog_offset = __cpu_to_le32(data_offset -
2062 8 - sb_offset);
2063 }
2064 break;
2065 default:
2066 pr_err("Failed to write invalid metadata format 1.%i to %s\n",
2067 st->minor_version, di->devname);
2068 rv = -EINVAL;
2069 goto out;
2070 }
2071 /*
2072 * Disable badblock log on clusters, or when
2073 * explicitly requested
2074 */
2075 if (st->nodes > 0 || conf_get_create_info()->bblist == 0) {
2076 sb->bblog_size = 0;
2077 sb->bblog_offset = 0;
2078 }
2079
2080 /* RAID0 needs a layout if devices aren't all the same size */
2081 if (raid0_need_layout)
2082 sb->feature_map |= __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT);
2083
2084 sb->sb_csum = calc_sb_1_csum(sb);
2085 rv = store_super1(st, di->fd);
2086
2087 if (rv == 0 && (di->disk.state & (1 << MD_DISK_JOURNAL))) {
2088 rv = write_empty_r5l_meta_block(st, di->fd);
2089 if (rv)
2090 goto error_out;
2091 }
2092
2093 if (rv == 0 &&
2094 (__le32_to_cpu(sb->feature_map) &
2095 MD_FEATURE_BITMAP_OFFSET)) {
2096 rv = st->ss->write_bitmap(st, di->fd, NodeNumUpdate);
2097 } else if (rv == 0 &&
2098 md_feature_any_ppl_on(sb->feature_map)) {
2099 struct mdinfo info;
2100
2101 st->ss->getinfo_super(st, &info, NULL);
2102 rv = st->ss->write_init_ppl(st, &info, di->fd);
2103 }
2104
2105 close(di->fd);
2106 di->fd = -1;
2107 if (rv)
2108 goto error_out;
2109 }
2110 error_out:
2111 if (rv)
2112 pr_err("Failed to write metadata to %s\n", di->devname);
2113 out:
2114 return rv;
2115 }
2116
2117 static int compare_super1(struct supertype *st, struct supertype *tst)
2118 {
2119 /*
2120 * return:
2121 * 0 same, or first was empty, and second was copied
2122 * 1 second had wrong number
2123 * 2 wrong uuid
2124 * 3 wrong other info
2125 */
2126 struct mdp_superblock_1 *first = st->sb;
2127 struct mdp_superblock_1 *second = tst->sb;
2128
2129 if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
2130 return 1;
2131 if (second->major_version != __cpu_to_le32(1))
2132 return 1;
2133
2134 if (!first) {
2135 if (posix_memalign((void**)&first, 4096, SUPER1_SIZE) != 0) {
2136 pr_err("could not allocate superblock\n");
2137 return 1;
2138 }
2139 memcpy(first, second, SUPER1_SIZE);
2140 st->sb = first;
2141 return 0;
2142 }
2143 if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
2144 return 2;
2145
2146 if (first->ctime != second->ctime ||
2147 first->level != second->level ||
2148 first->layout != second->layout ||
2149 first->size != second->size ||
2150 first->chunksize != second->chunksize ||
2151 first->raid_disks != second->raid_disks)
2152 return 3;
2153 return 0;
2154 }
2155
2156 static int load_super1(struct supertype *st, int fd, char *devname)
2157 {
2158 unsigned long long dsize;
2159 unsigned long long sb_offset;
2160 struct mdp_superblock_1 *super;
2161 int uuid[4];
2162 struct bitmap_super_s *bsb;
2163 struct misc_dev_info *misc;
2164 struct align_fd afd;
2165
2166 free_super1(st);
2167
2168 init_afd(&afd, fd);
2169
2170 if (st->ss == NULL || st->minor_version == -1) {
2171 int bestvers = -1;
2172 struct supertype tst;
2173 __u64 bestctime = 0;
2174 /* guess... choose latest ctime */
2175 memset(&tst, 0, sizeof(tst));
2176 tst.ss = &super1;
2177 for (tst.minor_version = 0; tst.minor_version <= 2;
2178 tst.minor_version++) {
2179 switch(load_super1(&tst, fd, devname)) {
2180 case 0: super = tst.sb;
2181 if (bestvers == -1 ||
2182 bestctime < __le64_to_cpu(super->ctime)) {
2183 bestvers = tst.minor_version;
2184 bestctime = __le64_to_cpu(super->ctime);
2185 }
2186 free(super);
2187 tst.sb = NULL;
2188 break;
2189 case 1: return 1; /*bad device */
2190 case 2: break; /* bad, try next */
2191 }
2192 }
2193 if (bestvers != -1) {
2194 int rv;
2195 tst.minor_version = bestvers;
2196 tst.ss = &super1;
2197 tst.max_devs = MAX_DEVS;
2198 rv = load_super1(&tst, fd, devname);
2199 if (rv == 0)
2200 *st = tst;
2201 return rv;
2202 }
2203 return 2;
2204 }
2205 if (!get_dev_size(fd, devname, &dsize))
2206 return 1;
2207 dsize >>= 9;
2208
2209 if (dsize < 24) {
2210 if (devname)
2211 pr_err("%s is too small for md: size is %llu sectors.\n",
2212 devname, dsize);
2213 return 1;
2214 }
2215
2216 /*
2217 * Calculate the position of the superblock.
2218 * It is always aligned to a 4K boundary and
2219 * depending on minor_version, it can be:
2220 * 0: At least 8K, but less than 12K, from end of device
2221 * 1: At start of device
2222 * 2: 4K from start of device.
2223 */
2224 switch(st->minor_version) {
2225 case 0:
2226 sb_offset = dsize;
2227 sb_offset -= 8*2;
2228 sb_offset &= ~(4*2-1);
2229 break;
2230 case 1:
2231 sb_offset = 0;
2232 break;
2233 case 2:
2234 sb_offset = 4*2;
2235 break;
2236 default:
2237 return -EINVAL;
2238 }
2239
2240 if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
2241 if (devname)
2242 pr_err("Cannot seek to superblock on %s: %s\n",
2243 devname, strerror(errno));
2244 return 1;
2245 }
2246
2247 if (posix_memalign((void**)&super, 4096, SUPER1_SIZE) != 0) {
2248 pr_err("could not allocate superblock\n");
2249 return 1;
2250 }
2251
2252 memset(super, 0, SUPER1_SIZE);
2253
2254 if (aread(&afd, super, MAX_SB_SIZE) != MAX_SB_SIZE) {
2255 if (devname)
2256 pr_err("Cannot read superblock on %s\n",
2257 devname);
2258 free(super);
2259 return 1;
2260 }
2261
2262 if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) {
2263 if (devname)
2264 pr_err("No super block found on %s (Expected magic %08x, got %08x)\n",
2265 devname, MD_SB_MAGIC,
2266 __le32_to_cpu(super->magic));
2267 free(super);
2268 return 2;
2269 }
2270
2271 if (__le32_to_cpu(super->major_version) != 1) {
2272 if (devname)
2273 pr_err("Cannot interpret superblock on %s - version is %d\n",
2274 devname, __le32_to_cpu(super->major_version));
2275 free(super);
2276 return 2;
2277 }
2278 if (__le64_to_cpu(super->super_offset) != sb_offset) {
2279 if (devname)
2280 pr_err("No superblock found on %s (super_offset is wrong)\n",
2281 devname);
2282 free(super);
2283 return 2;
2284 }
2285 st->sb = super;
2286
2287 bsb = (struct bitmap_super_s *)(((char*)super)+MAX_SB_SIZE);
2288
2289 misc = (struct misc_dev_info*)
2290 (((char*)super)+MAX_SB_SIZE+BM_SUPER_SIZE);
2291 misc->device_size = dsize;
2292 if (st->data_offset == INVALID_SECTORS)
2293 st->data_offset = __le64_to_cpu(super->data_offset);
2294
2295 /* Now check on the bitmap superblock */
2296 if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
2297 return 0;
2298 /* Read the bitmap superblock and make sure it looks
2299 * valid. If it doesn't clear the bit. An --assemble --force
2300 * should get that written out.
2301 */
2302 locate_bitmap1(st, fd, 0);
2303 if (aread(&afd, bsb, 512) != 512)
2304 goto no_bitmap;
2305
2306 uuid_from_super1(st, uuid);
2307 if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
2308 memcmp(bsb->uuid, uuid, 16) != 0)
2309 goto no_bitmap;
2310 return 0;
2311
2312 no_bitmap:
2313 super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map)
2314 & ~MD_FEATURE_BITMAP_OFFSET);
2315 return 0;
2316 }
2317
2318 static struct supertype *match_metadata_desc1(char *arg)
2319 {
2320 struct supertype *st = xcalloc(1, sizeof(*st));
2321
2322 st->container_devnm[0] = 0;
2323 st->ss = &super1;
2324 st->max_devs = MAX_DEVS;
2325 st->sb = NULL;
2326 st->data_offset = INVALID_SECTORS;
2327 /* leading zeros can be safely ignored. --detail generates them. */
2328 while (*arg == '0')
2329 arg++;
2330 if (strcmp(arg, "1.0") == 0 || strcmp(arg, "1.00") == 0) {
2331 st->minor_version = 0;
2332 return st;
2333 }
2334 if (strcmp(arg, "1.1") == 0 || strcmp(arg, "1.01") == 0
2335 ) {
2336 st->minor_version = 1;
2337 return st;
2338 }
2339 if (strcmp(arg, "1.2") == 0 ||
2340 #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */
2341 strcmp(arg, "default") == 0 ||
2342 #endif /* DEFAULT_OLD_METADATA */
2343 strcmp(arg, "1.02") == 0) {
2344 st->minor_version = 2;
2345 return st;
2346 }
2347 if (strcmp(arg, "1") == 0 || strcmp(arg, "default") == 0) {
2348 st->minor_version = -1;
2349 return st;
2350 }
2351
2352 free(st);
2353 return NULL;
2354 }
2355
2356 /* find available size on device with this devsize, using
2357 * superblock type st, and reserving 'reserve' sectors for
2358 * a possible bitmap
2359 */
2360 static __u64 avail_size1(struct supertype *st, __u64 devsize,
2361 unsigned long long data_offset)
2362 {
2363 struct mdp_superblock_1 *super = st->sb;
2364 int bmspace = 0;
2365 int bbspace = 0;
2366 if (devsize < 24)
2367 return 0;
2368
2369 if (__le32_to_cpu(super->feature_map) & MD_FEATURE_BITMAP_OFFSET) {
2370 /* hot-add. allow for actual size of bitmap */
2371 struct bitmap_super_s *bsb;
2372 bsb = (struct bitmap_super_s *)(((char*)super)+MAX_SB_SIZE);
2373 bmspace = calc_bitmap_size(bsb, 4096) >> 9;
2374 } else if (md_feature_any_ppl_on(super->feature_map)) {
2375 bmspace = __le16_to_cpu(super->ppl.size);
2376 }
2377
2378 /* Allow space for bad block log */
2379 if (super->bblog_size)
2380 bbspace = __le16_to_cpu(super->bblog_size);
2381
2382 if (st->minor_version < 0)
2383 /* not specified, so time to set default */
2384 st->minor_version = 2;
2385
2386 if (data_offset == INVALID_SECTORS)
2387 data_offset = st->data_offset;
2388
2389 if (data_offset != INVALID_SECTORS)
2390 switch(st->minor_version) {
2391 case 0:
2392 return devsize - data_offset - 8*2 - bbspace;
2393 case 1:
2394 case 2:
2395 return devsize - data_offset;
2396 default:
2397 return 0;
2398 }
2399
2400 devsize -= bmspace;
2401
2402 switch(st->minor_version) {
2403 case 0:
2404 /* at end */
2405 return ((devsize - 8*2 - bbspace ) & ~(4*2-1));
2406 case 1:
2407 /* at start, 4K for superblock and possible bitmap */
2408 return devsize - 4*2 - bbspace;
2409 case 2:
2410 /* 4k from start, 4K for superblock and possible bitmap */
2411 return devsize - (4+4)*2 - bbspace;
2412 }
2413 return 0;
2414 }
2415
2416 static int
2417 add_internal_bitmap1(struct supertype *st,
2418 int *chunkp, int delay, int write_behind,
2419 unsigned long long size,
2420 int may_change, int major)
2421 {
2422 /*
2423 * If not may_change, then this is a 'Grow' without sysfs support for
2424 * bitmaps, and the bitmap must fit after the superblock at 1K offset.
2425 * If may_change, then this is create or a Grow with sysfs support,
2426 * and we can put the bitmap wherever we like.
2427 *
2428 * size is in sectors, chunk is in bytes !!!
2429 */
2430
2431 unsigned long long bits;
2432 unsigned long long max_bits;
2433 unsigned long long min_chunk;
2434 long offset;
2435 long bbl_offset, bbl_size;
2436 unsigned long long chunk = *chunkp;
2437 int room = 0;
2438 int creating = 0;
2439 int len;
2440 struct mdp_superblock_1 *sb = st->sb;
2441 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE);
2442 int uuid[4];
2443
2444 if (__le64_to_cpu(sb->data_size) == 0)
2445 /*
2446 * Must be creating the array, else data_size
2447 * would be non-zero
2448 */
2449 creating = 1;
2450 switch(st->minor_version) {
2451 case 0:
2452 /*
2453 * either 3K after the superblock (when hot-add),
2454 * or some amount of space before.
2455 */
2456 if (creating) {
2457 /*
2458 * We are creating array, so we *know* how much room has
2459 * been left.
2460 */
2461 offset = 0;
2462 bbl_size = 8;
2463 room =
2464 choose_bm_space(__le64_to_cpu(sb->size)) + bbl_size;
2465 } else {
2466 room = __le64_to_cpu(sb->super_offset)
2467 - __le64_to_cpu(sb->data_offset)
2468 - __le64_to_cpu(sb->data_size);
2469 bbl_size = __le16_to_cpu(sb->bblog_size);
2470 if (bbl_size < 8)
2471 bbl_size = 8;
2472 bbl_offset = (__s32)__le32_to_cpu(sb->bblog_offset);
2473 if (bbl_size < -bbl_offset)
2474 bbl_size = -bbl_offset;
2475
2476 if (!may_change ||
2477 (room < 3*2 && __le32_to_cpu(sb->max_dev) <= 384)) {
2478 room = 3*2;
2479 offset = 1*2;
2480 bbl_size = 0;
2481 } else {
2482 offset = 0; /* means movable offset */
2483 }
2484 }
2485 break;
2486 case 1:
2487 case 2: /* between superblock and data */
2488 if (creating) {
2489 offset = 4*2;
2490 bbl_size = 8;
2491 room =
2492 choose_bm_space(__le64_to_cpu(sb->size)) + bbl_size;
2493 } else {
2494 room = __le64_to_cpu(sb->data_offset)
2495 - __le64_to_cpu(sb->super_offset);
2496 bbl_size = __le16_to_cpu(sb->bblog_size);
2497 if (bbl_size)
2498 room =
2499 __le32_to_cpu(sb->bblog_offset) + bbl_size;
2500 else
2501 bbl_size = 8;
2502
2503 if (!may_change) {
2504 room -= 2; /* Leave 1K for superblock */
2505 offset = 2;
2506 bbl_size = 0;
2507 } else {
2508 room -= 4*2; /* leave 4K for superblock */
2509 offset = 4*2;
2510 }
2511 }
2512 break;
2513 default:
2514 return -ENOSPC;
2515 }
2516
2517 room -= bbl_size;
2518 if (chunk == UnSet && room > 128*2)
2519 /* Limit to 128K of bitmap when chunk size not requested */
2520 room = 128*2;
2521
2522 if (room <= 1)
2523 /* No room for a bitmap */
2524 return -ENOSPC;
2525
2526 max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8;
2527
2528 min_chunk = 4096; /* sub-page chunks don't work yet.. */
2529 bits = (size*512)/min_chunk +1;
2530 while (bits > max_bits) {
2531 min_chunk *= 2;
2532 bits = (bits+1)/2;
2533 }
2534 if (chunk == UnSet) {
2535 /* For practical purpose, 64Meg is a good
2536 * default chunk size for internal bitmaps.
2537 */
2538 chunk = min_chunk;
2539 if (chunk < 64*1024*1024)
2540 chunk = 64*1024*1024;
2541 } else if (chunk < min_chunk)
2542 return -EINVAL; /* chunk size too small */
2543 if (chunk == 0) /* rounding problem */
2544 return -EINVAL;
2545
2546 if (offset == 0) {
2547 /* start bitmap on a 4K boundary with enough space for
2548 * the bitmap
2549 */
2550 bits = (size*512) / chunk + 1;
2551 room = ((bits+7)/8 + sizeof(bitmap_super_t) +4095)/4096;
2552 room *= 8; /* convert 4K blocks to sectors */
2553 offset = -room - bbl_size;
2554 }
2555
2556 sb->bitmap_offset = (int32_t)__cpu_to_le32(offset);
2557
2558 sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) |
2559 MD_FEATURE_BITMAP_OFFSET);
2560 memset(bms, 0, sizeof(*bms));
2561 bms->magic = __cpu_to_le32(BITMAP_MAGIC);
2562 bms->version = __cpu_to_le32(major);
2563 uuid_from_super1(st, uuid);
2564 memcpy(bms->uuid, uuid, 16);
2565 bms->chunksize = __cpu_to_le32(chunk);
2566 bms->daemon_sleep = __cpu_to_le32(delay);
2567 bms->sync_size = __cpu_to_le64(size);
2568 bms->write_behind = __cpu_to_le32(write_behind);
2569 bms->nodes = __cpu_to_le32(st->nodes);
2570 if (st->nodes)
2571 sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) |
2572 MD_FEATURE_BITMAP_VERSIONED);
2573 if (st->cluster_name) {
2574 len = sizeof(bms->cluster_name);
2575 strncpy((char *)bms->cluster_name, st->cluster_name, len);
2576 bms->cluster_name[len - 1] = '\0';
2577 }
2578
2579 *chunkp = chunk;
2580 return 0;
2581 }
2582
2583 static int locate_bitmap1(struct supertype *st, int fd, int node_num)
2584 {
2585 unsigned long long offset;
2586 struct mdp_superblock_1 *sb;
2587 int mustfree = 0;
2588 int ret;
2589
2590 if (!st->sb) {
2591 if (st->ss->load_super(st, fd, NULL))
2592 return -1; /* no error I hope... */
2593 mustfree = 1;
2594 }
2595 sb = st->sb;
2596
2597 if ((__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET))
2598 ret = 0;
2599 else
2600 ret = -1;
2601 offset = __le64_to_cpu(sb->super_offset);
2602 offset += (int32_t) __le32_to_cpu(sb->bitmap_offset) * (node_num + 1);
2603 if (mustfree)
2604 free(sb);
2605 lseek64(fd, offset<<9, 0);
2606 return ret;
2607 }
2608
2609 static int write_bitmap1(struct supertype *st, int fd, enum bitmap_update update)
2610 {
2611 struct mdp_superblock_1 *sb = st->sb;
2612 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE);
2613 int rv = 0;
2614 void *buf;
2615 int towrite, n, len;
2616 struct align_fd afd;
2617 unsigned int i = 0;
2618 unsigned long long total_bm_space, bm_space_per_node;
2619
2620 switch (update) {
2621 case NameUpdate:
2622 /* update cluster name */
2623 if (st->cluster_name) {
2624 len = sizeof(bms->cluster_name);
2625 memset((char *)bms->cluster_name, 0, len);
2626 strncpy((char *)bms->cluster_name,
2627 st->cluster_name, len);
2628 bms->cluster_name[len - 1] = '\0';
2629 }
2630 break;
2631 case NodeNumUpdate:
2632 /* cluster md only supports superblock 1.2 now */
2633 if (st->minor_version != 2 &&
2634 bms->version == BITMAP_MAJOR_CLUSTERED) {
2635 pr_err("Warning: cluster md only works with superblock 1.2\n");
2636 return -EINVAL;
2637 }
2638
2639 if (bms->version == BITMAP_MAJOR_CLUSTERED) {
2640 if (__cpu_to_le32(st->nodes) < bms->nodes) {
2641 /*
2642 * Since the nodes num is not increased, no
2643 * need to check the space enough or not,
2644 * just update bms->nodes
2645 */
2646 bms->nodes = __cpu_to_le32(st->nodes);
2647 break;
2648 }
2649 } else {
2650 /*
2651 * no need to change bms->nodes for other
2652 * bitmap types
2653 */
2654 if (st->nodes)
2655 pr_err("Warning: --nodes option is only suitable for clustered bitmap\n");
2656 break;
2657 }
2658
2659 /*
2660 * Each node has an independent bitmap, it is necessary to
2661 * calculate the space is enough or not, first get how many
2662 * bytes for the total bitmap
2663 */
2664 bm_space_per_node = calc_bitmap_size(bms, 4096);
2665
2666 total_bm_space = 512 * (__le64_to_cpu(sb->data_offset) -
2667 __le64_to_cpu(sb->super_offset));
2668 /* leave another 4k for superblock */
2669 total_bm_space = total_bm_space - 4096;
2670
2671 if (bm_space_per_node * st->nodes > total_bm_space) {
2672 pr_err("Warning: The max num of nodes can't exceed %llu\n",
2673 total_bm_space / bm_space_per_node);
2674 return -ENOMEM;
2675 }
2676
2677 bms->nodes = __cpu_to_le32(st->nodes);
2678 break;
2679 case NoUpdate:
2680 default:
2681 break;
2682 }
2683
2684 init_afd(&afd, fd);
2685
2686 locate_bitmap1(st, fd, 0);
2687
2688 if (posix_memalign(&buf, 4096, 4096))
2689 return -ENOMEM;
2690
2691 do {
2692 /* Only the bitmap[0] should resync
2693 * whole device on initial assembly
2694 */
2695 if (i)
2696 memset(buf, 0x00, 4096);
2697 else
2698 memset(buf, 0xff, 4096);
2699 memcpy(buf, (char *)bms, sizeof(bitmap_super_t));
2700
2701 /*
2702 * use 4096 boundary if bitmap_offset is aligned
2703 * with 8 sectors, then it should compatible with
2704 * older mdadm.
2705 */
2706 if (__le32_to_cpu(sb->bitmap_offset) & 7)
2707 towrite = calc_bitmap_size(bms, 512);
2708 else
2709 towrite = calc_bitmap_size(bms, 4096);
2710 while (towrite > 0) {
2711 n = towrite;
2712 if (n > 4096)
2713 n = 4096;
2714 n = awrite(&afd, buf, n);
2715 if (n > 0)
2716 towrite -= n;
2717 else
2718 break;
2719 if (i)
2720 memset(buf, 0x00, 4096);
2721 else
2722 memset(buf, 0xff, 4096);
2723 }
2724 fsync(fd);
2725 if (towrite) {
2726 rv = -2;
2727 break;
2728 }
2729 } while (++i < __le32_to_cpu(bms->nodes));
2730
2731 free(buf);
2732 return rv;
2733 }
2734
2735 static void free_super1(struct supertype *st)
2736 {
2737
2738 if (st->sb)
2739 free(st->sb);
2740 while (st->info) {
2741 struct devinfo *di = st->info;
2742 st->info = di->next;
2743 if (di->fd >= 0)
2744 close(di->fd);
2745 free(di);
2746 }
2747 st->sb = NULL;
2748 }
2749
2750 static int validate_geometry1(struct supertype *st, int level,
2751 int layout, int raiddisks,
2752 int *chunk, unsigned long long size,
2753 unsigned long long data_offset,
2754 char *subdev, unsigned long long *freesize,
2755 int consistency_policy, int verbose)
2756 {
2757 unsigned long long ldsize, devsize;
2758 int bmspace;
2759 unsigned long long headroom;
2760 unsigned long long overhead;
2761 int fd;
2762
2763 if (level == LEVEL_CONTAINER) {
2764 if (verbose)
2765 pr_err("1.x metadata does not support containers\n");
2766 return 0;
2767 }
2768 if (*chunk == UnSet)
2769 *chunk = DEFAULT_CHUNK;
2770
2771 if (!subdev)
2772 return 1;
2773
2774 if (st->minor_version < 0)
2775 /* not specified, so time to set default */
2776 st->minor_version = 2;
2777
2778 fd = open(subdev, O_RDONLY|O_EXCL, 0);
2779 if (fd < 0) {
2780 if (verbose)
2781 pr_err("super1.x cannot open %s: %s\n",
2782 subdev, strerror(errno));
2783 return 0;
2784 }
2785
2786 if (!get_dev_size(fd, subdev, &ldsize)) {
2787 close(fd);
2788 return 0;
2789 }
2790 close(fd);
2791
2792 devsize = ldsize >> 9;
2793
2794 /* creating: allow suitable space for bitmap or PPL */
2795 if (consistency_policy == CONSISTENCY_POLICY_PPL)
2796 bmspace = MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9;
2797 else
2798 bmspace = choose_bm_space(devsize);
2799
2800 if (data_offset == INVALID_SECTORS)
2801 data_offset = st->data_offset;
2802 if (data_offset == INVALID_SECTORS)
2803 switch (st->minor_version) {
2804 case 0:
2805 data_offset = 0;
2806 break;
2807 case 1:
2808 case 2:
2809 /* Choose data offset appropriate for this device
2810 * and use as default for whole array.
2811 * The data_offset must allow for bitmap space
2812 * and base metadata, should allow for some headroom
2813 * for reshape, and should be rounded to multiple
2814 * of 1M.
2815 * Headroom is limited to 128M, but aim for about 0.1%
2816 */
2817 headroom = 128*1024*2;
2818 while ((headroom << 10) > devsize &&
2819 (*chunk == 0 ||
2820 headroom / 2 >= ((unsigned)(*chunk)*2)*2))
2821 headroom >>= 1;
2822 data_offset = 12*2 + bmspace + headroom;
2823 #define ONE_MEG (2*1024)
2824 data_offset = ROUND_UP(data_offset, ONE_MEG);
2825 break;
2826 }
2827 if (st->data_offset == INVALID_SECTORS)
2828 st->data_offset = data_offset;
2829 switch(st->minor_version) {
2830 case 0: /* metadata at end. Round down and subtract space to reserve */
2831 devsize = (devsize & ~(4ULL*2-1));
2832 /* space for metadata, bblog, bitmap/ppl */
2833 overhead = 8*2 + 8 + bmspace;
2834 if (devsize < overhead) /* detect underflow */
2835 goto dev_too_small_err;
2836 devsize -= overhead;
2837 break;
2838 case 1:
2839 case 2:
2840 if (devsize < data_offset) /* detect underflow */
2841 goto dev_too_small_err;
2842 devsize -= data_offset;
2843 break;
2844 }
2845 *freesize = devsize;
2846 return 1;
2847
2848 /* Error condition, device cannot even hold the overhead. */
2849 dev_too_small_err:
2850 fprintf(stderr, "device %s is too small (%lluK) for "
2851 "required metadata!\n", subdev, devsize>>1);
2852 *freesize = 0;
2853 return 0;
2854 }
2855
2856 void *super1_make_v0(struct supertype *st, struct mdinfo *info, mdp_super_t *sb0)
2857 {
2858 /* Create a v1.0 superblock based on 'info'*/
2859 void *ret;
2860 struct mdp_superblock_1 *sb;
2861 int i;
2862 unsigned long long offset;
2863
2864 if (posix_memalign(&ret, 4096, 1024) != 0)
2865 return NULL;
2866 sb = ret;
2867 memset(ret, 0, 1024);
2868 sb->magic = __cpu_to_le32(MD_SB_MAGIC);
2869 sb->major_version = __cpu_to_le32(1);
2870
2871 copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
2872 sprintf(sb->set_name, "%d", sb0->md_minor);
2873 sb->ctime = __cpu_to_le32(info->array.ctime+1);
2874 sb->level = __cpu_to_le32(info->array.level);
2875 sb->layout = __cpu_to_le32(info->array.layout);
2876 sb->size = __cpu_to_le64(info->component_size);
2877 sb->chunksize = __cpu_to_le32(info->array.chunk_size/512);
2878 sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
2879 if (info->array.level > 0)
2880 sb->data_size = sb->size;
2881 else
2882 sb->data_size = st->ss->avail_size(st, st->devsize/512, 0);
2883 sb->resync_offset = MaxSector;
2884 sb->max_dev = __cpu_to_le32(MD_SB_DISKS);
2885 sb->dev_number = __cpu_to_le32(info->disk.number);
2886 sb->utime = __cpu_to_le64(info->array.utime);
2887
2888 offset = st->devsize/512 - 8*2;
2889 offset &= ~(4*2-1);
2890 sb->super_offset = __cpu_to_le64(offset);
2891 //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset);
2892
2893 random_uuid(sb->device_uuid);
2894
2895 for (i = 0; i < MD_SB_DISKS; i++) {
2896 int state = sb0->disks[i].state;
2897 sb->dev_roles[i] = MD_DISK_ROLE_SPARE;
2898 if ((state & (1<<MD_DISK_SYNC)) &&
2899 !(state & (1<<MD_DISK_FAULTY)))
2900 sb->dev_roles[i] = __cpu_to_le16(sb0->disks[i].raid_disk);
2901 }
2902 sb->sb_csum = calc_sb_1_csum(sb);
2903 return ret;
2904 }
2905
2906 struct superswitch super1 = {
2907 .examine_super = examine_super1,
2908 .brief_examine_super = brief_examine_super1,
2909 .export_examine_super = export_examine_super1,
2910 .detail_super = detail_super1,
2911 .brief_detail_super = brief_detail_super1,
2912 .export_detail_super = export_detail_super1,
2913 .write_init_super = write_init_super1,
2914 .validate_geometry = validate_geometry1,
2915 .add_to_super = add_to_super1,
2916 .examine_badblocks = examine_badblocks_super1,
2917 .copy_metadata = copy_metadata1,
2918 .write_init_ppl = write_init_ppl1,
2919 .match_home = match_home1,
2920 .uuid_from_super = uuid_from_super1,
2921 .getinfo_super = getinfo_super1,
2922 .container_content = container_content1,
2923 .update_super = update_super1,
2924 .init_super = init_super1,
2925 .store_super = store_super1,
2926 .compare_super = compare_super1,
2927 .load_super = load_super1,
2928 .match_metadata_desc = match_metadata_desc1,
2929 .avail_size = avail_size1,
2930 .add_internal_bitmap = add_internal_bitmap1,
2931 .locate_bitmap = locate_bitmap1,
2932 .write_bitmap = write_bitmap1,
2933 .free_super = free_super1,
2934 #if __BYTE_ORDER == BIG_ENDIAN
2935 .swapuuid = 0,
2936 #else
2937 .swapuuid = 1,
2938 #endif
2939 .name = "1.x",
2940 };
Unnamed repository; edit this file 'description' to name the repository.