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