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