Fix handling of negative bitmap offsets on 64bit hosts.
[thirdparty/mdadm.git] / super1.c
CommitLineData
82d9eba6
NB
1/*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4f589ad0 4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
82d9eba6
NB
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@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 */
29
30#include "mdadm.h"
82d9eba6
NB
31/*
32 * The version-1 superblock :
33 * All numeric fields are little-endian.
34 *
35 * total size: 256 bytes plus 2 per device.
36 * 1K allows 384 devices.
37 */
38struct mdp_superblock_1 {
39 /* constant array information - 128 bytes */
40 __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
41 __u32 major_version; /* 1 */
42 __u32 feature_map; /* 0 for now */
43 __u32 pad0; /* always set to 0 when writing */
44
45 __u8 set_uuid[16]; /* user-space generated. */
46 char set_name[32]; /* set and interpreted by user-space */
47
48 __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
49 __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */
50 __u32 layout; /* only for raid5 currently */
51 __u64 size; /* used size of component devices, in 512byte sectors */
52
53 __u32 chunksize; /* in 512byte sectors */
54 __u32 raid_disks;
34163fc7
NB
55 __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts
56 * NOTE: signed, so bitmap can be before superblock
57 * only meaningful of feature_map[0] is set.
58 */
b674b5b8
NB
59
60 /* These are only valid with feature bit '4' */
b674b5b8 61 __u32 new_level; /* new level we are reshaping to */
ac957baa 62 __u64 reshape_position; /* next address in array-space for reshape */
b674b5b8
NB
63 __u32 delta_disks; /* change in number of raid_disks */
64 __u32 new_layout; /* new layout */
65 __u32 new_chunk; /* new chunk size (bytes) */
66 __u8 pad1[128-124]; /* set to 0 when written */
82d9eba6
NB
67
68 /* constant this-device information - 64 bytes */
69 __u64 data_offset; /* sector start of data, often 0 */
70 __u64 data_size; /* sectors in this device that can be used for data */
71 __u64 super_offset; /* sector start of this superblock */
72 __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */
73 __u32 dev_number; /* permanent identifier of this device - not role in raid */
74 __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
75 __u8 device_uuid[16]; /* user-space setable, ignored by kernel */
dfd4d8ee
NB
76 __u8 devflags; /* per-device flags. Only one defined...*/
77#define WriteMostly1 1 /* mask for writemostly flag in above */
78 __u8 pad2[64-57]; /* set to 0 when writing */
82d9eba6
NB
79
80 /* array state information - 64 bytes */
81 __u64 utime; /* 40 bits second, 24 btes microseconds */
82 __u64 events; /* incremented when superblock updated */
83 __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */
84 __u32 sb_csum; /* checksum upto devs[max_dev] */
85 __u32 max_dev; /* size of devs[] array to consider */
86 __u8 pad3[64-32]; /* set to 0 when writing */
87
88 /* device state information. Indexed by dev_number.
89 * 2 bytes per device
90 * Note there are no per-device state flags. State information is rolled
91 * into the 'roles' value. If a device is spare or faulty, then it doesn't
92 * have a meaningful role.
93 */
94 __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
95};
96
bee8ec56
NB
97struct misc_dev_info {
98 __u64 device_size;
99};
100
d2cd3ffc
NB
101/* feature_map bits */
102#define MD_FEATURE_BITMAP_OFFSET 1
103#define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
104 * must be honoured
105 */
b674b5b8 106#define MD_FEATURE_RESHAPE_ACTIVE 4
d2cd3ffc 107
b674b5b8 108#define MD_FEATURE_ALL (1|2|4)
d2cd3ffc 109
570c0542 110#ifndef offsetof
067db4df 111#define offsetof(t,f) ((size_t)&(((t*)0)->f))
570c0542 112#endif
82d9eba6
NB
113static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
114{
115 unsigned int disk_csum, csum;
116 unsigned long long newcsum;
117 int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2;
118 unsigned int *isuper = (unsigned int*)sb;
119 int i;
120
121/* make sure I can count... */
122 if (offsetof(struct mdp_superblock_1,data_offset) != 128 ||
123 offsetof(struct mdp_superblock_1, utime) != 192 ||
124 sizeof(struct mdp_superblock_1) != 256) {
125 fprintf(stderr, "WARNING - superblock isn't sized correctly\n");
126 }
127
128 disk_csum = sb->sb_csum;
129 sb->sb_csum = 0;
130 newcsum = 0;
722966c6
PC
131 for (i=0; size>=4; size -= 4 ) {
132 newcsum += __le32_to_cpu(*isuper);
133 isuper++;
134 }
82d9eba6
NB
135
136 if (size == 2)
137 newcsum += __le16_to_cpu(*(unsigned short*) isuper);
138
139 csum = (newcsum & 0xffffffff) + (newcsum >> 32);
140 sb->sb_csum = disk_csum;
83205b64 141 return __cpu_to_le32(csum);
82d9eba6
NB
142}
143
c7654afc 144#ifndef MDASSEMBLE
a1cbd7d0 145static void examine_super1(void *sbv, char *homehost)
82d9eba6
NB
146{
147 struct mdp_superblock_1 *sb = sbv;
148 time_t atime;
149 int d;
6fbba4c9 150 int faulty;
82d9eba6
NB
151 int i;
152 char *c;
a1cbd7d0 153 int l = homehost ? strlen(homehost) : 0;
83205b64 154 int layout;
82d9eba6
NB
155
156 printf(" Magic : %08x\n", __le32_to_cpu(sb->magic));
91eedefc
NB
157 printf(" Version : %02d\n", 1);
158 printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map));
82d9eba6
NB
159 printf(" Array UUID : ");
160 for (i=0; i<16; i++) {
82d9eba6 161 if ((i&3)==0 && i != 0) printf(":");
34163fc7 162 printf("%02x", sb->set_uuid[i]);
82d9eba6
NB
163 }
164 printf("\n");
a1cbd7d0
NB
165 printf(" Name : %.32s", sb->set_name);
166 if (l > 0 && l < 32 &&
167 sb->set_name[l] == ':' &&
168 strncmp(sb->set_name, homehost, l) == 0)
169 printf(" (local to host %s)", homehost);
170 printf("\n");
82d9eba6
NB
171 atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL;
172 printf(" Creation Time : %.24s\n", ctime(&atime));
173 c=map_num(pers, __le32_to_cpu(sb->level));
174 printf(" Raid Level : %s\n", c?c:"-unknown-");
175 printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks));
176 printf("\n");
e3362544 177 printf(" Used Dev Size : %llu%s\n",
2fb749d1
NB
178 (unsigned long long)__le64_to_cpu(sb->data_size),
179 human_size(__le64_to_cpu(sb->data_size)<<9));
b674b5b8
NB
180 if (__le32_to_cpu(sb->level) >= 0) {
181 int ddsks=0;
182 switch(__le32_to_cpu(sb->level)) {
183 case 1: ddsks=1;break;
184 case 4:
83205b64
NB
185 case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break;
186 case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break;
187 case 10:
188 layout = __le32_to_cpu(sb->layout);
189 ddsks = __le32_to_cpu(sb->raid_disks)
190 / (layout&255) / ((layout>>8)&255);
b674b5b8
NB
191 }
192 if (ddsks)
83205b64 193 printf(" Array Size : %llu%s\n",
c1c05f7f 194 ddsks*(unsigned long long)__le64_to_cpu(sb->size),
83205b64 195 human_size(ddsks*__le64_to_cpu(sb->size)<<9));
b674b5b8 196 if (sb->size != sb->data_size)
83205b64
NB
197 printf(" Used Size : %llu%s\n",
198 (unsigned long long)__le64_to_cpu(sb->size),
199 human_size(__le64_to_cpu(sb->size)<<9));
b674b5b8 200 }
82d9eba6 201 if (sb->data_offset)
199171a2
NB
202 printf(" Data Offset : %llu sectors\n",
203 (unsigned long long)__le64_to_cpu(sb->data_offset));
204 printf(" Super Offset : %llu sectors\n",
205 (unsigned long long)__le64_to_cpu(sb->super_offset));
d2cd3ffc
NB
206 if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET)
207 printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset));
a3fd117c 208 printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean");
82d9eba6
NB
209 printf(" Device UUID : ");
210 for (i=0; i<16; i++) {
82d9eba6 211 if ((i&3)==0 && i != 0) printf(":");
34163fc7 212 printf("%02x", sb->device_uuid[i]);
82d9eba6
NB
213 }
214 printf("\n");
b674b5b8 215 printf("\n");
91eedefc
NB
216 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
217 printf("Internal Bitmap : %ld sectors from superblock\n",
68754bd1 218 (long)(int32_t)__le32_to_cpu(sb->bitmap_offset));
8fac0577 219 }
b674b5b8 220 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
1e0d770c 221 printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2,
b674b5b8
NB
222 human_size(__le64_to_cpu(sb->reshape_position)<<9));
223 if (__le32_to_cpu(sb->delta_disks)) {
224 printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks));
225 if (__le32_to_cpu(sb->delta_disks))
226 printf(" (%d->%d)\n",
227 __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks),
228 __le32_to_cpu(sb->raid_disks));
229 else
230 printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks),
231 __le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks));
232 }
233 if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) {
234 c = map_num(pers, __le32_to_cpu(sb->new_level));
235 printf(" New Level : %s\n", c?c:"-unknown-");
236 }
237 if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) {
238 if (__le32_to_cpu(sb->level) == 5) {
239 c = map_num(r5layout, __le32_to_cpu(sb->new_layout));
240 printf(" New Layout : %s\n", c?c:"-unknown-");
241 }
242 if (__le32_to_cpu(sb->level) == 10) {
b578481c 243 printf(" New Layout : near=%d, %s=%d\n",
b674b5b8 244 __le32_to_cpu(sb->new_layout)&255,
b578481c 245 (__le32_to_cpu(sb->new_layout)&0x10000)?"offset":"far",
b674b5b8
NB
246 (__le32_to_cpu(sb->new_layout)>>8)&255);
247 }
248 }
249 if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize))
250 printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2);
251 printf("\n");
252 }
dfd4d8ee
NB
253 if (sb->devflags) {
254 printf(" Flags :");
34163fc7 255 if (sb->devflags & WriteMostly1)
dfd4d8ee
NB
256 printf(" write-mostly");
257 printf("\n");
258 }
82d9eba6
NB
259
260 atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL;
261 printf(" Update Time : %.24s\n", ctime(&atime));
262
263 if (calc_sb_1_csum(sb) == sb->sb_csum)
264 printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum));
265 else
266 printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum),
267 __le32_to_cpu(calc_sb_1_csum(sb)));
570c0542 268 printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events));
82d9eba6
NB
269 printf("\n");
270 if (__le32_to_cpu(sb->level) == 5) {
271 c = map_num(r5layout, __le32_to_cpu(sb->layout));
272 printf(" Layout : %s\n", c?c:"-unknown-");
273 }
265e0f17
NB
274 if (__le32_to_cpu(sb->level) == 10) {
275 int lo = __le32_to_cpu(sb->layout);
b578481c
NB
276 printf(" Layout : near=%d, %s=%d\n",
277 lo&255,
278 (lo&0x10000)?"offset":"far",
279 (lo>>8)&255);
265e0f17 280 }
82d9eba6
NB
281 switch(__le32_to_cpu(sb->level)) {
282 case 0:
283 case 4:
284 case 5:
d2cd3ffc
NB
285 case 6:
286 case 10:
b674b5b8 287 printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2);
82d9eba6
NB
288 break;
289 case -1:
b674b5b8 290 printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2);
82d9eba6
NB
291 break;
292 default: break;
293 }
294 printf("\n");
c3684618
NB
295 printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number));
296 for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--)
297 if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff)
298 break;
299 for (d=0; d < i; d++) {
300 int role = __le16_to_cpu(sb->dev_roles[d]);
301 if (d) printf(", ");
302 if (role == 0xffff) printf("empty");
303 else if(role == 0xfffe) printf("failed");
304 else printf("%d", role);
305 }
306 printf(")\n");
82d9eba6
NB
307 printf(" Array State : ");
308 for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) {
309 int cnt = 0;
310 int me = 0;
311 int i;
312 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
313 int role = __le16_to_cpu(sb->dev_roles[i]);
314 if (role == d) {
315 if (i == __le32_to_cpu(sb->dev_number))
316 me = 1;
317 cnt++;
318 }
319 }
320 if (cnt > 1) printf("?");
321 else if (cnt == 1 && me) printf("U");
322 else if (cnt == 1) printf("u");
323 else printf ("_");
324 }
6fbba4c9 325 faulty = 0;
82d9eba6
NB
326 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
327 int role = __le16_to_cpu(sb->dev_roles[i]);
6fbba4c9
NB
328 if (role == 0xFFFE)
329 faulty++;
82d9eba6 330 }
82d9eba6
NB
331 if (faulty) printf(" %d failed", faulty);
332 printf("\n");
333}
334
335
336static void brief_examine_super1(void *sbv)
337{
338 struct mdp_superblock_1 *sb = sbv;
339 int i;
2998bc01 340 char *nm;
b015e6c2 341 char *c=map_num(pers, __le32_to_cpu(sb->level));
2998bc01
NB
342
343 nm = strchr(sb->set_name, ':');
344 if (nm)
345 nm++;
346 else if (sb->set_name[0])
347 nm = sb->set_name;
348 else
349 nm = "??";
82d9eba6 350
2998bc01
NB
351 printf("ARRAY /dev/md/%s level=%s metadata=1 num-devices=%d UUID=",
352 nm,
83205b64 353 c?c:"-unknown-", __le32_to_cpu(sb->raid_disks));
82d9eba6 354 for (i=0; i<16; i++) {
82d9eba6 355 if ((i&3)==0 && i != 0) printf(":");
b7a708af 356 printf("%02x", sb->set_uuid[i]);
82d9eba6 357 }
947fd4dd
NB
358 if (sb->set_name[0])
359 printf(" name=%.32s", sb->set_name);
82d9eba6
NB
360 printf("\n");
361}
362
b6750aa8 363static void detail_super1(void *sbv, char *homehost)
82d9eba6
NB
364{
365 struct mdp_superblock_1 *sb = sbv;
366 int i;
b6750aa8 367 int l = homehost ? strlen(homehost) : 0;
82d9eba6 368
b6750aa8
NB
369 printf(" Name : %.32s", sb->set_name);
370 if (l > 0 && l < 32 &&
371 sb->set_name[l] == ':' &&
372 strncmp(sb->set_name, homehost, l) == 0)
373 printf(" (local to host %s)", homehost);
374 printf("\n UUID : ");
82d9eba6 375 for (i=0; i<16; i++) {
82d9eba6 376 if ((i&3)==0 && i != 0) printf(":");
34163fc7 377 printf("%02x", sb->set_uuid[i]);
82d9eba6 378 }
570c0542 379 printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events));
82d9eba6
NB
380}
381
382static void brief_detail_super1(void *sbv)
383{
384 struct mdp_superblock_1 *sb = sbv;
385 int i;
386
947fd4dd
NB
387 if (sb->set_name[0])
388 printf(" name=%.32s", sb->set_name);
82d9eba6
NB
389 printf(" UUID=");
390 for (i=0; i<16; i++) {
82d9eba6 391 if ((i&3)==0 && i != 0) printf(":");
34163fc7 392 printf("%02x", sb->set_uuid[i]);
82d9eba6
NB
393 }
394}
395
54bad364
KS
396static void export_super1(void *sbv)
397{
398 struct mdp_superblock_1 *sb = sbv;
399 int i;
400 int len = 32;
401
402 for (i=0; i<32; i++)
403 if (sb->set_name[i] == '\n' ||
404 sb->set_name[i] == '\0') {
405 len = i;
406 break;
407 }
408 if (len)
409 printf("MD_NAME=%.*s\n", len, sb->set_name);
410 printf("MD_UUID=");
411 for (i=0; i<16; i++) {
412 if ((i&3)==0 && i != 0) printf(":");
413 printf("%02x", sb->set_uuid[i]);
414 }
415 printf("\n");
416}
417
c7654afc
NB
418#endif
419
83b6208e
NB
420static int match_home1(void *sbv, char *homehost)
421{
422 struct mdp_superblock_1 *sb = sbv;
423 int l = homehost ? strlen(homehost) : 0;
424
425 return (l > 0 && l < 32 &&
426 sb->set_name[l] == ':' &&
427 strncmp(sb->set_name, homehost, l) == 0);
428}
429
82d9eba6
NB
430static void uuid_from_super1(int uuid[4], void * sbv)
431{
432 struct mdp_superblock_1 *super = sbv;
433 char *cuuid = (char*)uuid;
434 int i;
435 for (i=0; i<16; i++)
436 cuuid[i] = super->set_uuid[i];
437}
438
31317663 439static void getinfo_super1(struct mdinfo *info, void *sbv)
82d9eba6
NB
440{
441 struct mdp_superblock_1 *sb = sbv;
442 int working = 0;
443 int i;
444 int role;
445
446 info->array.major_version = 1;
447 info->array.minor_version = __le32_to_cpu(sb->feature_map);
448 info->array.patch_version = 0;
449 info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
450 info->array.level = __le32_to_cpu(sb->level);
265e0f17 451 info->array.layout = __le32_to_cpu(sb->layout);
82d9eba6
NB
452 info->array.md_minor = -1;
453 info->array.ctime = __le64_to_cpu(sb->ctime);
353632d9 454 info->array.utime = __le64_to_cpu(sb->utime);
bed256c2 455 info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
4855f95c
NB
456 info->array.state =
457 (__le64_to_cpu(sb->resync_offset) >= __le64_to_cpu(sb->size))
458 ? 1 : 0;
353632d9
NB
459
460 info->data_offset = __le64_to_cpu(sb->data_offset);
461 info->component_size = __le64_to_cpu(sb->size);
82d9eba6
NB
462
463 info->disk.major = 0;
464 info->disk.minor = 0;
fbf8a0b7 465 info->disk.number = __le32_to_cpu(sb->dev_number);
82d9eba6
NB
466 if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
467 __le32_to_cpu(sb->max_dev) > 512)
468 role = 0xfffe;
469 else
470 role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
471
472 info->disk.raid_disk = -1;
473 switch(role) {
474 case 0xFFFF:
475 info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */
476 break;
477 case 0xFFFE:
478 info->disk.state = 1; /* faulty */
479 break;
480 default:
481 info->disk.state = 6; /* active and in sync */
482 info->disk.raid_disk = role;
483 }
484 info->events = __le64_to_cpu(sb->events);
485
486 memcpy(info->uuid, sb->set_uuid, 16);
487
31317663
NB
488 strncpy(info->name, sb->set_name, 32);
489 info->name[32] = 0;
947fd4dd 490
353632d9
NB
491 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
492 info->reshape_active = 1;
493 info->reshape_progress = __le64_to_cpu(sb->reshape_position);
494 info->new_level = __le32_to_cpu(sb->new_level);
495 info->delta_disks = __le32_to_cpu(sb->delta_disks);
496 info->new_layout = __le32_to_cpu(sb->new_layout);
bed256c2 497 info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
353632d9
NB
498 } else
499 info->reshape_active = 0;
500
82d9eba6
NB
501 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
502 role = __le16_to_cpu(sb->dev_roles[i]);
fbf8a0b7 503 if (/*role == 0xFFFF || */role < info->array.raid_disks)
82d9eba6
NB
504 working++;
505 }
506
507 info->array.working_disks = working;
508}
509
e5eac01f
NB
510static int update_super1(struct mdinfo *info, void *sbv, char *update,
511 char *devname, int verbose,
512 int uuid_set, char *homehost)
82d9eba6 513{
c4d831e1
NB
514 /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
515 * For others, the return value is ignored.
516 */
82d9eba6
NB
517 int rv = 0;
518 struct mdp_superblock_1 *sb = sbv;
519
67a8c82d
NB
520 if (strcmp(update, "force-one")==0) {
521 /* Not enough devices for a working array,
522 * so bring this one up-to-date
523 */
c4d831e1
NB
524 if (sb->events != __cpu_to_le64(info->events))
525 rv = 1;
6d3d5804 526 sb->events = __cpu_to_le64(info->events);
67a8c82d
NB
527 }
528 if (strcmp(update, "force-array")==0) {
529 /* Degraded array and 'force' requests to
530 * maybe need to mark it 'clean'.
531 */
82d9eba6
NB
532 switch(__le32_to_cpu(sb->level)) {
533 case 5: case 4: case 6:
534 /* need to force clean */
c4d831e1
NB
535 if (sb->resync_offset != ~0ULL)
536 rv = 1;
82d9eba6
NB
537 sb->resync_offset = ~0ULL;
538 }
539 }
540 if (strcmp(update, "assemble")==0) {
541 int d = info->disk.number;
542 int want;
543 if (info->disk.state == 6)
544 want = __cpu_to_le32(info->disk.raid_disk);
545 else
546 want = 0xFFFF;
547 if (sb->dev_roles[d] != want) {
548 sb->dev_roles[d] = want;
549 rv = 1;
550 }
551 }
82d9eba6
NB
552 if (strcmp(update, "grow") == 0) {
553 sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
d645b91a
NB
554 /* As we are just adding a spare, there is no need to
555 * make any change to the dev_roles array
556 */
82d9eba6
NB
557 }
558 if (strcmp(update, "resync") == 0) {
559 /* make sure resync happens */
434b7755 560 sb->resync_offset = 0ULL;
82d9eba6 561 }
14263cf1 562 if (strcmp(update, "uuid") == 0) {
350f29f9 563 copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
bf4fb153 564
14263cf1
NB
565 if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
566 struct bitmap_super_s *bm;
567 bm = (struct bitmap_super_s*)(sbv+1024);
bf4fb153 568 memcpy(bm->uuid, sb->set_uuid, 16);
14263cf1
NB
569 }
570 }
0237e0ca
NB
571 if (strcmp(update, "homehost") == 0 &&
572 homehost) {
573 char *c;
574 update = "name";
575 c = strchr(sb->set_name, ':');
576 if (c)
577 strncpy(info->name, c+1, 31 - (c-sb->set_name));
578 else
579 strncpy(info->name, sb->set_name, 32);
26a0b8fd 580 info->name[32] = 0;
0237e0ca 581 }
c4f12c13
NB
582 if (strcmp(update, "name") == 0) {
583 if (info->name[0] == 0)
584 sprintf(info->name, "%d", info->array.md_minor);
585 memset(sb->set_name, 0, sizeof(sb->set_name));
586 if (homehost &&
587 strchr(info->name, ':') == NULL &&
588 strlen(homehost)+1+strlen(info->name) < 32) {
589 strcpy(sb->set_name, homehost);
590 strcat(sb->set_name, ":");
591 strcat(sb->set_name, info->name);
592 } else
593 strcpy(sb->set_name, info->name);
594 }
bee8ec56
NB
595 if (strcmp(update, "devicesize") == 0 &&
596 __le64_to_cpu(sb->super_offset) <
597 __le64_to_cpu(sb->data_offset)) {
598 /* set data_size to device size less data_offset */
599 struct misc_dev_info *misc = (struct misc_dev_info*)
600 (sbv + 1024 + sizeof(struct bitmap_super_s));
eb9199fb
NB
601 printf("Size was %llu\n", (unsigned long long)
602 __le64_to_cpu(sb->data_size));
bee8ec56
NB
603 sb->data_size = __cpu_to_le64(
604 misc->device_size - __le64_to_cpu(sb->data_offset));
eb9199fb
NB
605 printf("Size is %llu\n", (unsigned long long)
606 __le64_to_cpu(sb->data_size));
bee8ec56 607 }
353632d9
NB
608 if (strcmp(update, "_reshape_progress")==0)
609 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
82d9eba6
NB
610
611 sb->sb_csum = calc_sb_1_csum(sb);
612 return rv;
613}
614
05697ec1 615static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info,
3d3dd91e 616 unsigned long long size, char *name, char *homehost, int *uuid)
82d9eba6 617{
bee8ec56
NB
618 struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t) +
619 sizeof(struct misc_dev_info));
82d9eba6 620 int spares;
34163fc7 621 int rfd;
05697ec1 622 char defname[10];
82d9eba6
NB
623 memset(sb, 0, 1024);
624
05697ec1 625 if (info->major_version == -1) {
82d9eba6 626 /* zeroing superblock */
05697ec1 627 *sbp = sb;
82d9eba6 628 return 0;
05697ec1 629 }
82d9eba6
NB
630
631 spares = info->working_disks - info->active_disks;
632 if (info->raid_disks + spares > 384) {
633 fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
634 info->raid_disks , spares, 384);
635 return 0;
636 }
637
82d9eba6
NB
638 sb->magic = __cpu_to_le32(MD_SB_MAGIC);
639 sb->major_version = __cpu_to_le32(1);
640 sb->feature_map = 0;
641 sb->pad0 = 0;
34163fc7 642
350f29f9
NB
643 if (uuid)
644 copy_uuid(sb->set_uuid, uuid, super1.swapuuid);
645 else {
3d3dd91e
NB
646 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
647 read(rfd, sb->set_uuid, 16) != 16) {
648 *(__u32*)(sb->set_uuid) = random();
649 *(__u32*)(sb->set_uuid+4) = random();
650 *(__u32*)(sb->set_uuid+8) = random();
651 *(__u32*)(sb->set_uuid+12) = random();
652 }
653 if (rfd >= 0) close(rfd);
34163fc7 654 }
82d9eba6 655
05697ec1
NB
656 if (name == NULL || *name == 0) {
657 sprintf(defname, "%d", info->md_minor);
658 name = defname;
659 }
947fd4dd 660 memset(sb->set_name, 0, 32);
05697ec1
NB
661 if (homehost &&
662 strchr(name, ':')== NULL &&
663 strlen(homehost)+1+strlen(name) < 32) {
664 strcpy(sb->set_name, homehost);
665 strcat(sb->set_name, ":");
666 strcat(sb->set_name, name);
667 } else
668 strcpy(sb->set_name, name);
82d9eba6
NB
669
670 sb->ctime = __cpu_to_le64((unsigned long long)time(0));
671 sb->level = __cpu_to_le32(info->level);
ea329559 672 sb->layout = __cpu_to_le32(info->layout);
5dd497ee 673 sb->size = __cpu_to_le64(size*2ULL);
82d9eba6
NB
674 sb->chunksize = __cpu_to_le32(info->chunk_size>>9);
675 sb->raid_disks = __cpu_to_le32(info->raid_disks);
676
677 sb->data_offset = __cpu_to_le64(0);
678 sb->data_size = __cpu_to_le64(0);
679 sb->super_offset = __cpu_to_le64(0);
680 sb->recovery_offset = __cpu_to_le64(0);
681
682 sb->utime = sb->ctime;
683 sb->events = __cpu_to_le64(1);
34321279 684 if (info->state & (1<<MD_SB_CLEAN))
82d9eba6
NB
685 sb->resync_offset = ~0ULL;
686 else
687 sb->resync_offset = 0;
34163fc7 688 sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/
82d9eba6
NB
689 sizeof(sb->dev_roles[0]));
690 memset(sb->pad3, 0, sizeof(sb->pad3));
691
692 memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1));
693
694 *sbp = sb;
695 return 1;
696}
697
698/* Add a device to the superblock being created */
699static void add_to_super1(void *sbv, mdu_disk_info_t *dk)
700{
701 struct mdp_superblock_1 *sb = sbv;
702 __u16 *rp = sb->dev_roles + dk->number;
dfd4d8ee 703 if ((dk->state & 6) == 6) /* active, sync */
82d9eba6 704 *rp = __cpu_to_le16(dk->raid_disk);
412ca2e5 705 else if ((dk->state & ~2) == 0) /* active or idle -> spare */
82d9eba6 706 *rp = 0xffff;
34163fc7 707 else
82d9eba6
NB
708 *rp = 0xfffe;
709}
710
14263cf1
NB
711static void locate_bitmap1(struct supertype *st, int fd, void *sbv);
712
96395475 713static int store_super1(struct supertype *st, int fd, void *sbv)
82d9eba6
NB
714{
715 struct mdp_superblock_1 *sb = sbv;
6fbba4c9 716 unsigned long long sb_offset;
82d9eba6 717 int sbsize;
5dd497ee 718 unsigned long long dsize;
96395475 719
beae1dfe
NB
720 if (!get_dev_size(fd, NULL, &dsize))
721 return 1;
722
723 dsize >>= 9;
96395475 724
5dd497ee 725 if (dsize < 24)
96395475
NB
726 return 2;
727
728 /*
729 * Calculate the position of the superblock.
730 * It is always aligned to a 4K boundary and
731 * depending on minor_version, it can be:
732 * 0: At least 8K, but less than 12K, from end of device
733 * 1: At start of device
734 * 2: 4K from start of device.
735 */
736 switch(st->minor_version) {
737 case 0:
5dd497ee 738 sb_offset = dsize;
96395475
NB
739 sb_offset -= 8*2;
740 sb_offset &= ~(4*2-1);
741 break;
742 case 1:
6fbba4c9 743 sb_offset = 0;
96395475
NB
744 break;
745 case 2:
746 sb_offset = 4*2;
747 break;
748 default:
749 return -EINVAL;
750 }
751
82d9eba6 752
34163fc7 753
6fbba4c9
NB
754 if (sb_offset != __le64_to_cpu(sb->super_offset) &&
755 0 != __le64_to_cpu(sb->super_offset)
96395475
NB
756 ) {
757 fprintf(stderr, Name ": internal error - sb_offset is wrong\n");
758 abort();
759 }
82d9eba6 760
6fbba4c9 761 if (lseek64(fd, sb_offset << 9, 0)< 0LL)
82d9eba6
NB
762 return 3;
763
764 sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev);
765
766 if (write(fd, sb, sbsize) != sbsize)
767 return 4;
768
14263cf1
NB
769 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
770 struct bitmap_super_s *bm = (struct bitmap_super_s*)
41a3b72a 771 (((char*)sb)+1024);
14263cf1
NB
772 if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
773 locate_bitmap1(st, fd, sbv);
9fca7d62
NB
774 if (write(fd, bm, sizeof(*bm)) != sizeof(*bm))
775 return 5;
14263cf1
NB
776 }
777 }
570c0542 778 fsync(fd);
82d9eba6
NB
779 return 0;
780}
781
892debc8
NB
782static int load_super1(struct supertype *st, int fd, void **sbp, char *devname);
783
2fb749d1
NB
784static unsigned long choose_bm_space(unsigned long devsize)
785{
786 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
787 * if bigger than 200Gig, save 128k
788 */
789 if (devsize - 64*2 >= 200*1024*1024*2)
790 return 128*2;
791 if (devsize - 4*2 > 8*1024*1024*2)
792 return 64*2;
793 return 4*2;
794}
795
34163fc7 796static int write_init_super1(struct supertype *st, void *sbv,
1bf4e2d9 797 mdu_disk_info_t *dinfo, char *devname)
82d9eba6
NB
798{
799 struct mdp_superblock_1 *sb = sbv;
e478dc86 800 void *refsbv = NULL;
892debc8 801 int fd = open(devname, O_RDWR | O_EXCL);
dfe47e00 802 int rfd;
82d9eba6 803 int rv;
199171a2 804 int bm_space;
82d9eba6 805
8fac0577 806 unsigned long long dsize, array_size;
82d9eba6
NB
807 long long sb_offset;
808
809
810 if (fd < 0) {
811 fprintf(stderr, Name ": Failed to open %s to write superblock\n",
812 devname);
813 return -1;
814 }
815
816 sb->dev_number = __cpu_to_le32(dinfo->number);
34163fc7 817 if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY))
83205b64 818 sb->devflags |= __cpu_to_le32(WriteMostly1);
892debc8 819
dfe47e00
NB
820 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
821 read(rfd, sb->device_uuid, 16) != 16) {
822 *(__u32*)(sb->device_uuid) = random();
823 *(__u32*)(sb->device_uuid+4) = random();
824 *(__u32*)(sb->device_uuid+8) = random();
825 *(__u32*)(sb->device_uuid+12) = random();
826 }
827 if (rfd >= 0) close(rfd);
892debc8
NB
828 sb->events = 0;
829
e478dc86
NB
830 if (load_super1(st, fd, &refsbv, NULL)==0) {
831 struct mdp_superblock_1 *refsb = refsbv;
832
892debc8
NB
833 memcpy(sb->device_uuid, refsb->device_uuid, 16);
834 if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
835 /* same array, so preserve events and dev_number */
836 sb->events = refsb->events;
7eae7080
NB
837 /* bugs in 2.6.17 and earlier mean the dev_number
838 * chosen in Manage must be preserved
839 */
840 if (get_linux_version() >= 2006018)
841 sb->dev_number = refsb->dev_number;
892debc8
NB
842 }
843 free(refsb);
844 }
34163fc7 845
beae1dfe
NB
846 if (!get_dev_size(fd, NULL, &dsize))
847 return 1;
848 dsize >>= 9;
82d9eba6 849
5dd497ee 850 if (dsize < 24) {
024ce7fe 851 close(fd);
82d9eba6 852 return 2;
024ce7fe 853 }
82d9eba6
NB
854
855
856 /*
857 * Calculate the position of the superblock.
858 * It is always aligned to a 4K boundary and
859 * depending on minor_version, it can be:
860 * 0: At least 8K, but less than 12K, from end of device
861 * 1: At start of device
862 * 2: 4K from start of device.
21e92547
NB
863 * Depending on the array size, we might leave extra space
864 * for a bitmap.
82d9eba6 865 */
8fac0577 866 array_size = __le64_to_cpu(sb->size);
199171a2 867 /* work out how much space we left of a bitmap */
2fb749d1 868 bm_space = choose_bm_space(array_size);
199171a2 869
82d9eba6
NB
870 switch(st->minor_version) {
871 case 0:
5dd497ee 872 sb_offset = dsize;
82d9eba6
NB
873 sb_offset -= 8*2;
874 sb_offset &= ~(4*2-1);
875 sb->super_offset = __cpu_to_le64(sb_offset);
876 sb->data_offset = __cpu_to_le64(0);
199171a2 877 sb->data_size = __cpu_to_le64(sb_offset - bm_space);
82d9eba6
NB
878 break;
879 case 1:
880 sb->super_offset = __cpu_to_le64(0);
199171a2
NB
881 sb->data_offset = __cpu_to_le64(bm_space + 4*2);
882 sb->data_size = __cpu_to_le64(dsize - bm_space - 4*2);
82d9eba6
NB
883 break;
884 case 2:
885 sb_offset = 4*2;
199171a2
NB
886 sb->super_offset = __cpu_to_le64(4*2);
887 sb->data_offset = __cpu_to_le64(4*2 + 4*2 + bm_space);
888 sb->data_size = __cpu_to_le64(dsize - 4*2 - 4*2 - bm_space );
82d9eba6
NB
889 break;
890 default:
891 return -EINVAL;
892 }
893
894
895 sb->sb_csum = calc_sb_1_csum(sb);
96395475 896 rv = store_super1(st, fd, sb);
82d9eba6
NB
897 if (rv)
898 fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
34163fc7 899
1bf4e2d9
NB
900 if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1))
901 rv = st->ss->write_bitmap(st, fd, sbv);
024ce7fe 902 close(fd);
82d9eba6
NB
903 return rv;
904}
905
906static int compare_super1(void **firstp, void *secondv)
907{
908 /*
909 * return:
910 * 0 same, or first was empty, and second was copied
911 * 1 second had wrong number
912 * 2 wrong uuid
913 * 3 wrong other info
914 */
915 struct mdp_superblock_1 *first = *firstp;
916 struct mdp_superblock_1 *second = secondv;
917
918 if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
919 return 1;
920 if (second->major_version != __cpu_to_le32(1))
921 return 1;
922
923 if (!first) {
bee8ec56
NB
924 first = malloc(1024+sizeof(bitmap_super_t) +
925 sizeof(struct misc_dev_info));
926 memcpy(first, second, 1024+sizeof(bitmap_super_t) +
927 sizeof(struct misc_dev_info));
82d9eba6
NB
928 *firstp = first;
929 return 0;
930 }
931 if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
932 return 2;
933
934 if (first->ctime != second->ctime ||
935 first->level != second->level ||
936 first->layout != second->layout ||
937 first->size != second->size ||
938 first->chunksize != second->chunksize ||
939 first->raid_disks != second->raid_disks)
940 return 3;
941 return 0;
942}
943
944static int load_super1(struct supertype *st, int fd, void **sbp, char *devname)
945{
5dd497ee 946 unsigned long long dsize;
82d9eba6
NB
947 unsigned long long sb_offset;
948 struct mdp_superblock_1 *super;
14263cf1
NB
949 int uuid[4];
950 struct bitmap_super_s *bsb;
bee8ec56 951 struct misc_dev_info *misc;
82d9eba6
NB
952
953
954 if (st->ss == NULL) {
570c0542
NB
955 int bestvers = -1;
956 __u64 bestctime = 0;
957 /* guess... choose latest ctime */
82d9eba6
NB
958 st->ss = &super1;
959 for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) {
960 switch(load_super1(st, fd, sbp, devname)) {
570c0542
NB
961 case 0: super = *sbp;
962 if (bestvers == -1 ||
963 bestctime < __le64_to_cpu(super->ctime)) {
964 bestvers = st->minor_version;
965 bestctime = __le64_to_cpu(super->ctime);
966 }
967 free(super);
968 *sbp = NULL;
969 break;
82d9eba6
NB
970 case 1: st->ss = NULL; return 1; /*bad device */
971 case 2: break; /* bad, try next */
972 }
973 }
570c0542
NB
974 if (bestvers != -1) {
975 int rv;
976 st->minor_version = bestvers;
977 st->ss = &super1;
ea329559 978 st->max_devs = 384;
570c0542
NB
979 rv = load_super1(st, fd, sbp, devname);
980 if (rv) st->ss = NULL;
981 return rv;
982 }
82d9eba6
NB
983 st->ss = NULL;
984 return 2;
985 }
beae1dfe
NB
986 if (!get_dev_size(fd, devname, &dsize))
987 return 1;
988 dsize >>= 9;
82d9eba6 989
5dd497ee 990 if (dsize < 24) {
82d9eba6 991 if (devname)
5dd497ee
NB
992 fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n",
993 devname, dsize);
82d9eba6
NB
994 return 1;
995 }
996
997 /*
998 * Calculate the position of the superblock.
999 * It is always aligned to a 4K boundary and
14263cf1 1000 * depending on minor_version, it can be:
82d9eba6
NB
1001 * 0: At least 8K, but less than 12K, from end of device
1002 * 1: At start of device
1003 * 2: 4K from start of device.
1004 */
1005 switch(st->minor_version) {
1006 case 0:
5dd497ee 1007 sb_offset = dsize;
82d9eba6
NB
1008 sb_offset -= 8*2;
1009 sb_offset &= ~(4*2-1);
1010 break;
1011 case 1:
1012 sb_offset = 0;
1013 break;
1014 case 2:
1015 sb_offset = 4*2;
1016 break;
1017 default:
1018 return -EINVAL;
1019 }
1020
1021 ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
1022
1023
1024 if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
1025 if (devname)
1026 fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
1027 devname, strerror(errno));
1028 return 1;
1029 }
1030
bee8ec56
NB
1031 super = malloc(1024 + sizeof(bitmap_super_t) +
1032 sizeof(struct misc_dev_info));
82d9eba6
NB
1033
1034 if (read(fd, super, 1024) != 1024) {
1035 if (devname)
1036 fprintf(stderr, Name ": Cannot read superblock on %s\n",
1037 devname);
1038 free(super);
1039 return 1;
1040 }
1041
1042 if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) {
1043 if (devname)
1044 fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
1045 devname, MD_SB_MAGIC, __le32_to_cpu(super->magic));
1046 free(super);
1047 return 2;
1048 }
1049
1050 if (__le32_to_cpu(super->major_version) != 1) {
1051 if (devname)
1052 fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
1053 devname, __le32_to_cpu(super->major_version));
1054 free(super);
1055 return 2;
1056 }
1057 if (__le64_to_cpu(super->super_offset) != sb_offset) {
1058 if (devname)
1059 fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n",
1060 devname);
1061 free(super);
1062 return 2;
1063 }
1064 *sbp = super;
14263cf1 1065
bee8ec56
NB
1066 bsb = (struct bitmap_super_s *)(((char*)super)+1024);
1067
1068 misc = (struct misc_dev_info*) (bsb+1);
1069 misc->device_size = dsize;
1070
14263cf1
NB
1071 /* Now check on the bitmap superblock */
1072 if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
1073 return 0;
1074 /* Read the bitmap superblock and make sure it looks
1075 * valid. If it doesn't clear the bit. An --assemble --force
1076 * should get that written out.
1077 */
1078 locate_bitmap1(st, fd, super);
1079 if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s))
1080 != sizeof(struct bitmap_super_s))
1081 goto no_bitmap;
1082
1083 uuid_from_super1(uuid, super);
14263cf1
NB
1084 if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
1085 memcmp(bsb->uuid, uuid, 16) != 0)
1086 goto no_bitmap;
1087 return 0;
1088
1089 no_bitmap:
1090 super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1);
82d9eba6
NB
1091 return 0;
1092}
1093
1094
1095static struct supertype *match_metadata_desc1(char *arg)
1096{
1097 struct supertype *st = malloc(sizeof(*st));
1098 if (!st) return st;
1099
1100 st->ss = &super1;
ea329559 1101 st->max_devs = 384;
82d9eba6 1102 if (strcmp(arg, "1") == 0 ||
576d6d83
NB
1103 strcmp(arg, "1.0") == 0 ||
1104 strcmp(arg, "default/large") == 0) {
82d9eba6
NB
1105 st->minor_version = 0;
1106 return st;
1107 }
1108 if (strcmp(arg, "1.1") == 0) {
1109 st->minor_version = 1;
1110 return st;
1111 }
1112 if (strcmp(arg, "1.2") == 0) {
1113 st->minor_version = 2;
1114 return st;
1115 }
1116
1117 free(st);
1118 return NULL;
1119}
1120
34163fc7
NB
1121/* find available size on device with this devsize, using
1122 * superblock type st, and reserving 'reserve' sectors for
1123 * a possible bitmap
1124 */
1bf4e2d9 1125static __u64 avail_size1(struct supertype *st, __u64 devsize)
82d9eba6
NB
1126{
1127 if (devsize < 24)
1128 return 0;
1129
2fb749d1 1130 devsize -= choose_bm_space(devsize);
21e92547 1131
34163fc7
NB
1132 switch(st->minor_version) {
1133 case 0:
1bf4e2d9
NB
1134 /* at end */
1135 return ((devsize - 8*2 ) & ~(4*2-1));
34163fc7 1136 case 1:
1bf4e2d9
NB
1137 /* at start, 4K for superblock and possible bitmap */
1138 return devsize - 4*2;
34163fc7 1139 case 2:
1bf4e2d9
NB
1140 /* 4k from start, 4K for superblock and possible bitmap */
1141 return devsize - (4+4)*2;
34163fc7
NB
1142 }
1143 return 0;
1144}
1145
1bf4e2d9
NB
1146static int
1147add_internal_bitmap1(struct supertype *st, void *sbv,
199171a2
NB
1148 int *chunkp, int delay, int write_behind,
1149 unsigned long long size,
21e92547 1150 int may_change, int major)
34163fc7
NB
1151{
1152 /*
1bf4e2d9
NB
1153 * If not may_change, then this is a 'Grow', and the bitmap
1154 * must fit after the superblock.
1155 * If may_change, then this is create, and we can put the bitmap
1156 * before the superblock if we like, or may move the start.
199171a2
NB
1157 * If !may_change, the bitmap MUST live at offset of 1K, until
1158 * we get a sysfs interface.
34163fc7 1159 *
f9c25f1d 1160 * size is in sectors, chunk is in bytes !!!
34163fc7
NB
1161 */
1162
1bf4e2d9 1163 unsigned long long bits;
199171a2 1164 unsigned long long max_bits;
34163fc7 1165 unsigned long long min_chunk;
199171a2
NB
1166 long offset;
1167 int chunk = *chunkp;
37dfc3d6 1168 int room = 0;
34163fc7
NB
1169 struct mdp_superblock_1 *sb = sbv;
1170 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024);
1171
199171a2
NB
1172 switch(st->minor_version) {
1173 case 0:
1174 /* either 3K after the superblock, or some amount of space
1175 * before.
1176 */
1177 if (may_change) {
1178 /* We are creating array, so we *know* how much room has
1179 * been left.
1180 */
1181 offset = 0;
2fb749d1
NB
1182 room = choose_bm_space(__le64_to_cpu(sb->size));
1183 if (room == 4*2) {
1184 /* make it 3K after the superblock */
199171a2
NB
1185 room = 3*2;
1186 offset = 2;
1187 }
1188 } else {
1189 room = __le64_to_cpu(sb->super_offset)
1190 - __le64_to_cpu(sb->data_offset)
1191 - __le64_to_cpu(sb->data_size);
1192 /* remove '1 ||' when we can set offset via sysfs */
1193 if (1 || (room < 3*2 &&
1194 __le32_to_cpu(sb->max_dev) <= 384)) {
1195 room = 3*2;
1196 offset = 1*2;
1197 } else {
1198 offset = 0; /* means movable offset */
1199 }
1200 }
1201 break;
1202 case 1:
1203 case 2: /* between superblock and data */
1204 if (may_change) {
1205 offset = 4*2;
2fb749d1 1206 room = choose_bm_space(__le64_to_cpu(sb->size));
199171a2
NB
1207 } else {
1208 room = __le64_to_cpu(sb->data_offset)
1209 - __le64_to_cpu(sb->super_offset);
1210 if (1 || __le32_to_cpu(sb->max_dev) <= 384) {
1211 room -= 2;
1212 offset = 2;
1213 } else {
1214 room -= 4*2;
1215 offset = 4*2;
1216 }
1217 }
1218 break;
ae491d1e
NB
1219 default:
1220 return 0;
199171a2 1221 }
1bf4e2d9 1222
199171a2
NB
1223 if (chunk == UnSet && room > 128*2)
1224 /* Limit to 128K of bitmap when chunk size not requested */
1225 room = 128*2;
1bf4e2d9 1226
199171a2 1227 max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8;
34163fc7
NB
1228
1229 min_chunk = 4096; /* sub-page chunks don't work yet.. */
f9c25f1d 1230 bits = (size*512)/min_chunk +1;
34163fc7
NB
1231 while (bits > max_bits) {
1232 min_chunk *= 2;
1233 bits = (bits+1)/2;
1234 }
1235 if (chunk == UnSet)
1236 chunk = min_chunk;
1237 else if (chunk < min_chunk)
1238 return 0; /* chunk size too small */
21e92547
NB
1239 if (chunk == 0) /* rounding problem */
1240 return 0;
34163fc7 1241
199171a2
NB
1242 if (offset == 0) {
1243 bits = (size*512) / chunk + 1;
1244 room = ((bits+7)/8 + sizeof(bitmap_super_t) +511)/512;
1245 offset = -room;
1246 }
1247
1248 sb->bitmap_offset = __cpu_to_le32(offset);
34163fc7
NB
1249
1250 sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1);
29e766a5 1251 memset(bms, 0, sizeof(*bms));
34163fc7 1252 bms->magic = __cpu_to_le32(BITMAP_MAGIC);
dcec9ee5 1253 bms->version = __cpu_to_le32(major);
34163fc7
NB
1254 uuid_from_super1((int*)bms->uuid, sb);
1255 bms->chunksize = __cpu_to_le32(chunk);
1256 bms->daemon_sleep = __cpu_to_le32(delay);
f9c25f1d 1257 bms->sync_size = __cpu_to_le64(size);
34163fc7
NB
1258 bms->write_behind = __cpu_to_le32(write_behind);
1259
199171a2 1260 *chunkp = chunk;
34163fc7
NB
1261 return 1;
1262}
1263
1264
14263cf1 1265static void locate_bitmap1(struct supertype *st, int fd, void *sbv)
34163fc7 1266{
34163fc7 1267 unsigned long long offset;
1e0d770c
NB
1268 struct mdp_superblock_1 *sb;
1269 int mustfree = 0;
34163fc7 1270
1e0d770c
NB
1271 if (!sbv) {
1272 if (st->ss->load_super(st, fd, &sbv, NULL))
f6d75de8 1273 return; /* no error I hope... */
1e0d770c
NB
1274 mustfree = 1;
1275 }
1276 sb = sbv;
e478dc86 1277
1bf4e2d9 1278 offset = __le64_to_cpu(sb->super_offset);
68754bd1 1279 offset += (int32_t) __le32_to_cpu(sb->bitmap_offset);
1e0d770c 1280 if (mustfree)
f6d75de8 1281 free(sb);
1bf4e2d9 1282 lseek64(fd, offset<<9, 0);
34163fc7
NB
1283}
1284
14263cf1 1285static int write_bitmap1(struct supertype *st, int fd, void *sbv)
34163fc7
NB
1286{
1287 struct mdp_superblock_1 *sb = sbv;
1bf4e2d9 1288 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024);
34163fc7
NB
1289 int rv = 0;
1290
1291 int towrite, n;
1292 char buf[4096];
1293
f6d75de8 1294 locate_bitmap1(st, fd, sbv);
34163fc7 1295
1e0d770c
NB
1296 if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) !=
1297 sizeof(bitmap_super_t))
1298 return -2;
1bf4e2d9
NB
1299 towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
1300 towrite = (towrite+7) >> 3; /* bits to bytes */
34163fc7
NB
1301 memset(buf, 0xff, sizeof(buf));
1302 while (towrite > 0) {
1303 n = towrite;
1304 if (n > sizeof(buf))
1305 n = sizeof(buf);
1306 n = write(fd, buf, n);
1307 if (n > 0)
1308 towrite -= n;
1309 else
1310 break;
1311 }
1312 fsync(fd);
1313 if (towrite)
1314 rv = -2;
1315
1316 return rv;
82d9eba6
NB
1317}
1318
1319struct superswitch super1 = {
c7654afc 1320#ifndef MDASSEMBLE
82d9eba6
NB
1321 .examine_super = examine_super1,
1322 .brief_examine_super = brief_examine_super1,
1323 .detail_super = detail_super1,
1324 .brief_detail_super = brief_detail_super1,
54bad364 1325 .export_super = export_super1,
c7654afc 1326#endif
83b6208e 1327 .match_home = match_home1,
82d9eba6
NB
1328 .uuid_from_super = uuid_from_super1,
1329 .getinfo_super = getinfo_super1,
1330 .update_super = update_super1,
82d9eba6
NB
1331 .init_super = init_super1,
1332 .add_to_super = add_to_super1,
1333 .store_super = store_super1,
1334 .write_init_super = write_init_super1,
1335 .compare_super = compare_super1,
1336 .load_super = load_super1,
1337 .match_metadata_desc = match_metadata_desc1,
1338 .avail_size = avail_size1,
34163fc7
NB
1339 .add_internal_bitmap = add_internal_bitmap1,
1340 .locate_bitmap = locate_bitmap1,
1341 .write_bitmap = write_bitmap1,
82d9eba6 1342 .major = 1,
f277ce36
NB
1343#if __BYTE_ORDER == BIG_ENDIAN
1344 .swapuuid = 0,
1345#else
1346 .swapuuid = 1,
1347#endif
82d9eba6 1348};