Centralise code for copying uuid
[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
NB
177 printf(" Used Dev Size : %llu%s\n",
178 (unsigned long long)sb->data_size,
179 human_size(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",
8fac0577
NB
218 (long)__le32_to_cpu(sb->bitmap_offset));
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
c7654afc
NB
396#endif
397
83b6208e
NB
398static int match_home1(void *sbv, char *homehost)
399{
400 struct mdp_superblock_1 *sb = sbv;
401 int l = homehost ? strlen(homehost) : 0;
402
403 return (l > 0 && l < 32 &&
404 sb->set_name[l] == ':' &&
405 strncmp(sb->set_name, homehost, l) == 0);
406}
407
82d9eba6
NB
408static void uuid_from_super1(int uuid[4], void * sbv)
409{
410 struct mdp_superblock_1 *super = sbv;
411 char *cuuid = (char*)uuid;
412 int i;
413 for (i=0; i<16; i++)
414 cuuid[i] = super->set_uuid[i];
415}
416
31317663 417static void getinfo_super1(struct mdinfo *info, void *sbv)
82d9eba6
NB
418{
419 struct mdp_superblock_1 *sb = sbv;
420 int working = 0;
421 int i;
422 int role;
423
424 info->array.major_version = 1;
425 info->array.minor_version = __le32_to_cpu(sb->feature_map);
426 info->array.patch_version = 0;
427 info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
428 info->array.level = __le32_to_cpu(sb->level);
265e0f17 429 info->array.layout = __le32_to_cpu(sb->layout);
82d9eba6
NB
430 info->array.md_minor = -1;
431 info->array.ctime = __le64_to_cpu(sb->ctime);
353632d9 432 info->array.utime = __le64_to_cpu(sb->utime);
bed256c2 433 info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
4855f95c
NB
434 info->array.state =
435 (__le64_to_cpu(sb->resync_offset) >= __le64_to_cpu(sb->size))
436 ? 1 : 0;
353632d9
NB
437
438 info->data_offset = __le64_to_cpu(sb->data_offset);
439 info->component_size = __le64_to_cpu(sb->size);
82d9eba6
NB
440
441 info->disk.major = 0;
442 info->disk.minor = 0;
fbf8a0b7 443 info->disk.number = __le32_to_cpu(sb->dev_number);
82d9eba6
NB
444 if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
445 __le32_to_cpu(sb->max_dev) > 512)
446 role = 0xfffe;
447 else
448 role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
449
450 info->disk.raid_disk = -1;
451 switch(role) {
452 case 0xFFFF:
453 info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */
454 break;
455 case 0xFFFE:
456 info->disk.state = 1; /* faulty */
457 break;
458 default:
459 info->disk.state = 6; /* active and in sync */
460 info->disk.raid_disk = role;
461 }
462 info->events = __le64_to_cpu(sb->events);
463
464 memcpy(info->uuid, sb->set_uuid, 16);
465
31317663
NB
466 strncpy(info->name, sb->set_name, 32);
467 info->name[32] = 0;
947fd4dd 468
353632d9
NB
469 if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
470 info->reshape_active = 1;
471 info->reshape_progress = __le64_to_cpu(sb->reshape_position);
472 info->new_level = __le32_to_cpu(sb->new_level);
473 info->delta_disks = __le32_to_cpu(sb->delta_disks);
474 info->new_layout = __le32_to_cpu(sb->new_layout);
bed256c2 475 info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
353632d9
NB
476 } else
477 info->reshape_active = 0;
478
82d9eba6
NB
479 for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
480 role = __le16_to_cpu(sb->dev_roles[i]);
fbf8a0b7 481 if (/*role == 0xFFFF || */role < info->array.raid_disks)
82d9eba6
NB
482 working++;
483 }
484
485 info->array.working_disks = working;
486}
487
e5eac01f
NB
488static int update_super1(struct mdinfo *info, void *sbv, char *update,
489 char *devname, int verbose,
490 int uuid_set, char *homehost)
82d9eba6 491{
c4d831e1
NB
492 /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
493 * For others, the return value is ignored.
494 */
82d9eba6
NB
495 int rv = 0;
496 struct mdp_superblock_1 *sb = sbv;
497
67a8c82d
NB
498 if (strcmp(update, "force-one")==0) {
499 /* Not enough devices for a working array,
500 * so bring this one up-to-date
501 */
c4d831e1
NB
502 if (sb->events != __cpu_to_le64(info->events))
503 rv = 1;
6d3d5804 504 sb->events = __cpu_to_le64(info->events);
67a8c82d
NB
505 }
506 if (strcmp(update, "force-array")==0) {
507 /* Degraded array and 'force' requests to
508 * maybe need to mark it 'clean'.
509 */
82d9eba6
NB
510 switch(__le32_to_cpu(sb->level)) {
511 case 5: case 4: case 6:
512 /* need to force clean */
c4d831e1
NB
513 if (sb->resync_offset != ~0ULL)
514 rv = 1;
82d9eba6
NB
515 sb->resync_offset = ~0ULL;
516 }
517 }
518 if (strcmp(update, "assemble")==0) {
519 int d = info->disk.number;
520 int want;
521 if (info->disk.state == 6)
522 want = __cpu_to_le32(info->disk.raid_disk);
523 else
524 want = 0xFFFF;
525 if (sb->dev_roles[d] != want) {
526 sb->dev_roles[d] = want;
527 rv = 1;
528 }
529 }
82d9eba6
NB
530 if (strcmp(update, "grow") == 0) {
531 sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
d645b91a
NB
532 /* As we are just adding a spare, there is no need to
533 * make any change to the dev_roles array
534 */
82d9eba6
NB
535 }
536 if (strcmp(update, "resync") == 0) {
537 /* make sure resync happens */
434b7755 538 sb->resync_offset = 0ULL;
82d9eba6 539 }
14263cf1 540 if (strcmp(update, "uuid") == 0) {
350f29f9 541 copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
bf4fb153 542
14263cf1
NB
543 if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
544 struct bitmap_super_s *bm;
545 bm = (struct bitmap_super_s*)(sbv+1024);
bf4fb153 546 memcpy(bm->uuid, sb->set_uuid, 16);
14263cf1
NB
547 }
548 }
0237e0ca
NB
549 if (strcmp(update, "homehost") == 0 &&
550 homehost) {
551 char *c;
552 update = "name";
553 c = strchr(sb->set_name, ':');
554 if (c)
555 strncpy(info->name, c+1, 31 - (c-sb->set_name));
556 else
557 strncpy(info->name, sb->set_name, 32);
26a0b8fd 558 info->name[32] = 0;
0237e0ca 559 }
c4f12c13
NB
560 if (strcmp(update, "name") == 0) {
561 if (info->name[0] == 0)
562 sprintf(info->name, "%d", info->array.md_minor);
563 memset(sb->set_name, 0, sizeof(sb->set_name));
564 if (homehost &&
565 strchr(info->name, ':') == NULL &&
566 strlen(homehost)+1+strlen(info->name) < 32) {
567 strcpy(sb->set_name, homehost);
568 strcat(sb->set_name, ":");
569 strcat(sb->set_name, info->name);
570 } else
571 strcpy(sb->set_name, info->name);
572 }
bee8ec56
NB
573 if (strcmp(update, "devicesize") == 0 &&
574 __le64_to_cpu(sb->super_offset) <
575 __le64_to_cpu(sb->data_offset)) {
576 /* set data_size to device size less data_offset */
577 struct misc_dev_info *misc = (struct misc_dev_info*)
578 (sbv + 1024 + sizeof(struct bitmap_super_s));
579 printf("Size was %llu\n", __le64_to_cpu(sb->data_size));
580 sb->data_size = __cpu_to_le64(
581 misc->device_size - __le64_to_cpu(sb->data_offset));
582 printf("Size is %llu\n", __le64_to_cpu(sb->data_size));
583 }
353632d9
NB
584 if (strcmp(update, "_reshape_progress")==0)
585 sb->reshape_position = __cpu_to_le64(info->reshape_progress);
82d9eba6
NB
586
587 sb->sb_csum = calc_sb_1_csum(sb);
588 return rv;
589}
590
05697ec1 591static int init_super1(struct supertype *st, void **sbp, mdu_array_info_t *info,
3d3dd91e 592 unsigned long long size, char *name, char *homehost, int *uuid)
82d9eba6 593{
bee8ec56
NB
594 struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t) +
595 sizeof(struct misc_dev_info));
82d9eba6 596 int spares;
34163fc7 597 int rfd;
05697ec1 598 char defname[10];
82d9eba6
NB
599 memset(sb, 0, 1024);
600
05697ec1 601 if (info->major_version == -1) {
82d9eba6 602 /* zeroing superblock */
05697ec1 603 *sbp = sb;
82d9eba6 604 return 0;
05697ec1 605 }
82d9eba6
NB
606
607 spares = info->working_disks - info->active_disks;
608 if (info->raid_disks + spares > 384) {
609 fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n",
610 info->raid_disks , spares, 384);
611 return 0;
612 }
613
82d9eba6
NB
614 sb->magic = __cpu_to_le32(MD_SB_MAGIC);
615 sb->major_version = __cpu_to_le32(1);
616 sb->feature_map = 0;
617 sb->pad0 = 0;
34163fc7 618
350f29f9
NB
619 if (uuid)
620 copy_uuid(sb->set_uuid, uuid, super1.swapuuid);
621 else {
3d3dd91e
NB
622 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
623 read(rfd, sb->set_uuid, 16) != 16) {
624 *(__u32*)(sb->set_uuid) = random();
625 *(__u32*)(sb->set_uuid+4) = random();
626 *(__u32*)(sb->set_uuid+8) = random();
627 *(__u32*)(sb->set_uuid+12) = random();
628 }
629 if (rfd >= 0) close(rfd);
34163fc7 630 }
82d9eba6 631
05697ec1
NB
632 if (name == NULL || *name == 0) {
633 sprintf(defname, "%d", info->md_minor);
634 name = defname;
635 }
947fd4dd 636 memset(sb->set_name, 0, 32);
05697ec1
NB
637 if (homehost &&
638 strchr(name, ':')== NULL &&
639 strlen(homehost)+1+strlen(name) < 32) {
640 strcpy(sb->set_name, homehost);
641 strcat(sb->set_name, ":");
642 strcat(sb->set_name, name);
643 } else
644 strcpy(sb->set_name, name);
82d9eba6
NB
645
646 sb->ctime = __cpu_to_le64((unsigned long long)time(0));
647 sb->level = __cpu_to_le32(info->level);
ea329559 648 sb->layout = __cpu_to_le32(info->layout);
5dd497ee 649 sb->size = __cpu_to_le64(size*2ULL);
82d9eba6
NB
650 sb->chunksize = __cpu_to_le32(info->chunk_size>>9);
651 sb->raid_disks = __cpu_to_le32(info->raid_disks);
652
653 sb->data_offset = __cpu_to_le64(0);
654 sb->data_size = __cpu_to_le64(0);
655 sb->super_offset = __cpu_to_le64(0);
656 sb->recovery_offset = __cpu_to_le64(0);
657
658 sb->utime = sb->ctime;
659 sb->events = __cpu_to_le64(1);
34321279 660 if (info->state & (1<<MD_SB_CLEAN))
82d9eba6
NB
661 sb->resync_offset = ~0ULL;
662 else
663 sb->resync_offset = 0;
34163fc7 664 sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/
82d9eba6
NB
665 sizeof(sb->dev_roles[0]));
666 memset(sb->pad3, 0, sizeof(sb->pad3));
667
668 memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1));
669
670 *sbp = sb;
671 return 1;
672}
673
674/* Add a device to the superblock being created */
675static void add_to_super1(void *sbv, mdu_disk_info_t *dk)
676{
677 struct mdp_superblock_1 *sb = sbv;
678 __u16 *rp = sb->dev_roles + dk->number;
dfd4d8ee 679 if ((dk->state & 6) == 6) /* active, sync */
82d9eba6 680 *rp = __cpu_to_le16(dk->raid_disk);
412ca2e5 681 else if ((dk->state & ~2) == 0) /* active or idle -> spare */
82d9eba6 682 *rp = 0xffff;
34163fc7 683 else
82d9eba6
NB
684 *rp = 0xfffe;
685}
686
14263cf1
NB
687static void locate_bitmap1(struct supertype *st, int fd, void *sbv);
688
96395475 689static int store_super1(struct supertype *st, int fd, void *sbv)
82d9eba6
NB
690{
691 struct mdp_superblock_1 *sb = sbv;
6fbba4c9 692 unsigned long long sb_offset;
82d9eba6 693 int sbsize;
5dd497ee 694 unsigned long long dsize;
96395475 695
beae1dfe
NB
696 if (!get_dev_size(fd, NULL, &dsize))
697 return 1;
698
699 dsize >>= 9;
96395475 700
5dd497ee 701 if (dsize < 24)
96395475
NB
702 return 2;
703
704 /*
705 * Calculate the position of the superblock.
706 * It is always aligned to a 4K boundary and
707 * depending on minor_version, it can be:
708 * 0: At least 8K, but less than 12K, from end of device
709 * 1: At start of device
710 * 2: 4K from start of device.
711 */
712 switch(st->minor_version) {
713 case 0:
5dd497ee 714 sb_offset = dsize;
96395475
NB
715 sb_offset -= 8*2;
716 sb_offset &= ~(4*2-1);
717 break;
718 case 1:
6fbba4c9 719 sb_offset = 0;
96395475
NB
720 break;
721 case 2:
722 sb_offset = 4*2;
723 break;
724 default:
725 return -EINVAL;
726 }
727
82d9eba6 728
34163fc7 729
6fbba4c9
NB
730 if (sb_offset != __le64_to_cpu(sb->super_offset) &&
731 0 != __le64_to_cpu(sb->super_offset)
96395475
NB
732 ) {
733 fprintf(stderr, Name ": internal error - sb_offset is wrong\n");
734 abort();
735 }
82d9eba6 736
6fbba4c9 737 if (lseek64(fd, sb_offset << 9, 0)< 0LL)
82d9eba6
NB
738 return 3;
739
740 sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev);
741
742 if (write(fd, sb, sbsize) != sbsize)
743 return 4;
744
14263cf1
NB
745 if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
746 struct bitmap_super_s *bm = (struct bitmap_super_s*)
41a3b72a 747 (((char*)sb)+1024);
14263cf1
NB
748 if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
749 locate_bitmap1(st, fd, sbv);
9fca7d62
NB
750 if (write(fd, bm, sizeof(*bm)) != sizeof(*bm))
751 return 5;
14263cf1
NB
752 }
753 }
570c0542 754 fsync(fd);
82d9eba6
NB
755 return 0;
756}
757
892debc8
NB
758static int load_super1(struct supertype *st, int fd, void **sbp, char *devname);
759
34163fc7 760static int write_init_super1(struct supertype *st, void *sbv,
1bf4e2d9 761 mdu_disk_info_t *dinfo, char *devname)
82d9eba6
NB
762{
763 struct mdp_superblock_1 *sb = sbv;
e478dc86 764 void *refsbv = NULL;
892debc8 765 int fd = open(devname, O_RDWR | O_EXCL);
dfe47e00 766 int rfd;
82d9eba6 767 int rv;
199171a2 768 int bm_space;
82d9eba6 769
199171a2 770 unsigned long space;
8fac0577 771 unsigned long long dsize, array_size;
82d9eba6
NB
772 long long sb_offset;
773
774
775 if (fd < 0) {
776 fprintf(stderr, Name ": Failed to open %s to write superblock\n",
777 devname);
778 return -1;
779 }
780
781 sb->dev_number = __cpu_to_le32(dinfo->number);
34163fc7 782 if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY))
83205b64 783 sb->devflags |= __cpu_to_le32(WriteMostly1);
892debc8 784
dfe47e00
NB
785 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
786 read(rfd, sb->device_uuid, 16) != 16) {
787 *(__u32*)(sb->device_uuid) = random();
788 *(__u32*)(sb->device_uuid+4) = random();
789 *(__u32*)(sb->device_uuid+8) = random();
790 *(__u32*)(sb->device_uuid+12) = random();
791 }
792 if (rfd >= 0) close(rfd);
892debc8
NB
793 sb->events = 0;
794
e478dc86
NB
795 if (load_super1(st, fd, &refsbv, NULL)==0) {
796 struct mdp_superblock_1 *refsb = refsbv;
797
892debc8
NB
798 memcpy(sb->device_uuid, refsb->device_uuid, 16);
799 if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
800 /* same array, so preserve events and dev_number */
801 sb->events = refsb->events;
7eae7080
NB
802 /* bugs in 2.6.17 and earlier mean the dev_number
803 * chosen in Manage must be preserved
804 */
805 if (get_linux_version() >= 2006018)
806 sb->dev_number = refsb->dev_number;
892debc8
NB
807 }
808 free(refsb);
809 }
34163fc7 810
beae1dfe
NB
811 if (!get_dev_size(fd, NULL, &dsize))
812 return 1;
813 dsize >>= 9;
82d9eba6 814
5dd497ee 815 if (dsize < 24) {
024ce7fe 816 close(fd);
82d9eba6 817 return 2;
024ce7fe 818 }
82d9eba6
NB
819
820
821 /*
822 * Calculate the position of the superblock.
823 * It is always aligned to a 4K boundary and
824 * depending on minor_version, it can be:
825 * 0: At least 8K, but less than 12K, from end of device
826 * 1: At start of device
827 * 2: 4K from start of device.
21e92547
NB
828 * Depending on the array size, we might leave extra space
829 * for a bitmap.
82d9eba6 830 */
8fac0577 831 array_size = __le64_to_cpu(sb->size);
199171a2
NB
832 /* work out how much space we left of a bitmap */
833 if (array_size >= 200*1024*1024*2)
834 bm_space = 128*2;
835 else if (array_size > 8*1024*1024*2)
836 bm_space = 64*2;
837 else
838 bm_space = 0;
839
82d9eba6
NB
840 switch(st->minor_version) {
841 case 0:
5dd497ee 842 sb_offset = dsize;
82d9eba6
NB
843 sb_offset -= 8*2;
844 sb_offset &= ~(4*2-1);
845 sb->super_offset = __cpu_to_le64(sb_offset);
846 sb->data_offset = __cpu_to_le64(0);
199171a2 847 sb->data_size = __cpu_to_le64(sb_offset - bm_space);
82d9eba6
NB
848 break;
849 case 1:
850 sb->super_offset = __cpu_to_le64(0);
199171a2
NB
851 sb->data_offset = __cpu_to_le64(bm_space + 4*2);
852 sb->data_size = __cpu_to_le64(dsize - bm_space - 4*2);
82d9eba6
NB
853 break;
854 case 2:
855 sb_offset = 4*2;
561832f9 856 if (dsize - 4*2 - 64*2 >= array_size && array_size > 8*1024*1024*2)
21e92547
NB
857 space = 64*2;
858 else
859 space = 4*2;
199171a2
NB
860 sb->super_offset = __cpu_to_le64(4*2);
861 sb->data_offset = __cpu_to_le64(4*2 + 4*2 + bm_space);
862 sb->data_size = __cpu_to_le64(dsize - 4*2 - 4*2 - bm_space );
82d9eba6
NB
863 break;
864 default:
865 return -EINVAL;
866 }
867
868
869 sb->sb_csum = calc_sb_1_csum(sb);
96395475 870 rv = store_super1(st, fd, sb);
82d9eba6
NB
871 if (rv)
872 fprintf(stderr, Name ": failed to write superblock to %s\n", devname);
34163fc7 873
1bf4e2d9
NB
874 if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1))
875 rv = st->ss->write_bitmap(st, fd, sbv);
024ce7fe 876 close(fd);
82d9eba6
NB
877 return rv;
878}
879
880static int compare_super1(void **firstp, void *secondv)
881{
882 /*
883 * return:
884 * 0 same, or first was empty, and second was copied
885 * 1 second had wrong number
886 * 2 wrong uuid
887 * 3 wrong other info
888 */
889 struct mdp_superblock_1 *first = *firstp;
890 struct mdp_superblock_1 *second = secondv;
891
892 if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
893 return 1;
894 if (second->major_version != __cpu_to_le32(1))
895 return 1;
896
897 if (!first) {
bee8ec56
NB
898 first = malloc(1024+sizeof(bitmap_super_t) +
899 sizeof(struct misc_dev_info));
900 memcpy(first, second, 1024+sizeof(bitmap_super_t) +
901 sizeof(struct misc_dev_info));
82d9eba6
NB
902 *firstp = first;
903 return 0;
904 }
905 if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
906 return 2;
907
908 if (first->ctime != second->ctime ||
909 first->level != second->level ||
910 first->layout != second->layout ||
911 first->size != second->size ||
912 first->chunksize != second->chunksize ||
913 first->raid_disks != second->raid_disks)
914 return 3;
915 return 0;
916}
917
918static int load_super1(struct supertype *st, int fd, void **sbp, char *devname)
919{
5dd497ee 920 unsigned long long dsize;
82d9eba6
NB
921 unsigned long long sb_offset;
922 struct mdp_superblock_1 *super;
14263cf1
NB
923 int uuid[4];
924 struct bitmap_super_s *bsb;
bee8ec56 925 struct misc_dev_info *misc;
82d9eba6
NB
926
927
928 if (st->ss == NULL) {
570c0542
NB
929 int bestvers = -1;
930 __u64 bestctime = 0;
931 /* guess... choose latest ctime */
82d9eba6
NB
932 st->ss = &super1;
933 for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) {
934 switch(load_super1(st, fd, sbp, devname)) {
570c0542
NB
935 case 0: super = *sbp;
936 if (bestvers == -1 ||
937 bestctime < __le64_to_cpu(super->ctime)) {
938 bestvers = st->minor_version;
939 bestctime = __le64_to_cpu(super->ctime);
940 }
941 free(super);
942 *sbp = NULL;
943 break;
82d9eba6
NB
944 case 1: st->ss = NULL; return 1; /*bad device */
945 case 2: break; /* bad, try next */
946 }
947 }
570c0542
NB
948 if (bestvers != -1) {
949 int rv;
950 st->minor_version = bestvers;
951 st->ss = &super1;
ea329559 952 st->max_devs = 384;
570c0542
NB
953 rv = load_super1(st, fd, sbp, devname);
954 if (rv) st->ss = NULL;
955 return rv;
956 }
82d9eba6
NB
957 st->ss = NULL;
958 return 2;
959 }
beae1dfe
NB
960 if (!get_dev_size(fd, devname, &dsize))
961 return 1;
962 dsize >>= 9;
82d9eba6 963
5dd497ee 964 if (dsize < 24) {
82d9eba6 965 if (devname)
5dd497ee
NB
966 fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n",
967 devname, dsize);
82d9eba6
NB
968 return 1;
969 }
970
971 /*
972 * Calculate the position of the superblock.
973 * It is always aligned to a 4K boundary and
14263cf1 974 * depending on minor_version, it can be:
82d9eba6
NB
975 * 0: At least 8K, but less than 12K, from end of device
976 * 1: At start of device
977 * 2: 4K from start of device.
978 */
979 switch(st->minor_version) {
980 case 0:
5dd497ee 981 sb_offset = dsize;
82d9eba6
NB
982 sb_offset -= 8*2;
983 sb_offset &= ~(4*2-1);
984 break;
985 case 1:
986 sb_offset = 0;
987 break;
988 case 2:
989 sb_offset = 4*2;
990 break;
991 default:
992 return -EINVAL;
993 }
994
995 ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
996
997
998 if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
999 if (devname)
1000 fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
1001 devname, strerror(errno));
1002 return 1;
1003 }
1004
bee8ec56
NB
1005 super = malloc(1024 + sizeof(bitmap_super_t) +
1006 sizeof(struct misc_dev_info));
82d9eba6
NB
1007
1008 if (read(fd, super, 1024) != 1024) {
1009 if (devname)
1010 fprintf(stderr, Name ": Cannot read superblock on %s\n",
1011 devname);
1012 free(super);
1013 return 1;
1014 }
1015
1016 if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) {
1017 if (devname)
1018 fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
1019 devname, MD_SB_MAGIC, __le32_to_cpu(super->magic));
1020 free(super);
1021 return 2;
1022 }
1023
1024 if (__le32_to_cpu(super->major_version) != 1) {
1025 if (devname)
1026 fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
1027 devname, __le32_to_cpu(super->major_version));
1028 free(super);
1029 return 2;
1030 }
1031 if (__le64_to_cpu(super->super_offset) != sb_offset) {
1032 if (devname)
1033 fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n",
1034 devname);
1035 free(super);
1036 return 2;
1037 }
1038 *sbp = super;
14263cf1 1039
bee8ec56
NB
1040 bsb = (struct bitmap_super_s *)(((char*)super)+1024);
1041
1042 misc = (struct misc_dev_info*) (bsb+1);
1043 misc->device_size = dsize;
1044
14263cf1
NB
1045 /* Now check on the bitmap superblock */
1046 if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
1047 return 0;
1048 /* Read the bitmap superblock and make sure it looks
1049 * valid. If it doesn't clear the bit. An --assemble --force
1050 * should get that written out.
1051 */
1052 locate_bitmap1(st, fd, super);
1053 if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s))
1054 != sizeof(struct bitmap_super_s))
1055 goto no_bitmap;
1056
1057 uuid_from_super1(uuid, super);
14263cf1
NB
1058 if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
1059 memcmp(bsb->uuid, uuid, 16) != 0)
1060 goto no_bitmap;
1061 return 0;
1062
1063 no_bitmap:
1064 super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1);
82d9eba6
NB
1065 return 0;
1066}
1067
1068
1069static struct supertype *match_metadata_desc1(char *arg)
1070{
1071 struct supertype *st = malloc(sizeof(*st));
1072 if (!st) return st;
1073
1074 st->ss = &super1;
ea329559 1075 st->max_devs = 384;
82d9eba6 1076 if (strcmp(arg, "1") == 0 ||
576d6d83
NB
1077 strcmp(arg, "1.0") == 0 ||
1078 strcmp(arg, "default/large") == 0) {
82d9eba6
NB
1079 st->minor_version = 0;
1080 return st;
1081 }
1082 if (strcmp(arg, "1.1") == 0) {
1083 st->minor_version = 1;
1084 return st;
1085 }
1086 if (strcmp(arg, "1.2") == 0) {
1087 st->minor_version = 2;
1088 return st;
1089 }
1090
1091 free(st);
1092 return NULL;
1093}
1094
34163fc7
NB
1095/* find available size on device with this devsize, using
1096 * superblock type st, and reserving 'reserve' sectors for
1097 * a possible bitmap
1098 */
1bf4e2d9 1099static __u64 avail_size1(struct supertype *st, __u64 devsize)
82d9eba6
NB
1100{
1101 if (devsize < 24)
1102 return 0;
1103
21e92547 1104 /* if the device is bigger than 8Gig, save 64k for bitmap usage,
199171a2 1105 * if bigger than 200Gig, save 128k
21e92547 1106 */
199171a2 1107 if (devsize-64*2 >= 200*1024*1024*2)
21e92547 1108 devsize -= 128*2;
199171a2 1109 else if (devsize >= 8*1024*1024*2)
21e92547
NB
1110 devsize -= 64*2;
1111
34163fc7
NB
1112 switch(st->minor_version) {
1113 case 0:
1bf4e2d9
NB
1114 /* at end */
1115 return ((devsize - 8*2 ) & ~(4*2-1));
34163fc7 1116 case 1:
1bf4e2d9
NB
1117 /* at start, 4K for superblock and possible bitmap */
1118 return devsize - 4*2;
34163fc7 1119 case 2:
1bf4e2d9
NB
1120 /* 4k from start, 4K for superblock and possible bitmap */
1121 return devsize - (4+4)*2;
34163fc7
NB
1122 }
1123 return 0;
1124}
1125
1bf4e2d9
NB
1126static int
1127add_internal_bitmap1(struct supertype *st, void *sbv,
199171a2
NB
1128 int *chunkp, int delay, int write_behind,
1129 unsigned long long size,
21e92547 1130 int may_change, int major)
34163fc7
NB
1131{
1132 /*
1bf4e2d9
NB
1133 * If not may_change, then this is a 'Grow', and the bitmap
1134 * must fit after the superblock.
1135 * If may_change, then this is create, and we can put the bitmap
1136 * before the superblock if we like, or may move the start.
199171a2
NB
1137 * If !may_change, the bitmap MUST live at offset of 1K, until
1138 * we get a sysfs interface.
34163fc7 1139 *
f9c25f1d 1140 * size is in sectors, chunk is in bytes !!!
34163fc7
NB
1141 */
1142
1bf4e2d9 1143 unsigned long long bits;
199171a2 1144 unsigned long long max_bits;
34163fc7 1145 unsigned long long min_chunk;
199171a2
NB
1146 long offset;
1147 int chunk = *chunkp;
37dfc3d6 1148 int room = 0;
34163fc7
NB
1149 struct mdp_superblock_1 *sb = sbv;
1150 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024);
1151
199171a2
NB
1152 switch(st->minor_version) {
1153 case 0:
1154 /* either 3K after the superblock, or some amount of space
1155 * before.
1156 */
1157 if (may_change) {
1158 /* We are creating array, so we *know* how much room has
1159 * been left.
1160 */
1161 offset = 0;
1162 if (__le64_to_cpu(sb->size) >= 200*1024*1024*2)
1163 room = 128*2;
1164 else if (__le64_to_cpu(sb->size) > 8*1024*1024*2)
1165 room = 64*2;
1166 else {
1167 room = 3*2;
1168 offset = 2;
1169 }
1170 } else {
1171 room = __le64_to_cpu(sb->super_offset)
1172 - __le64_to_cpu(sb->data_offset)
1173 - __le64_to_cpu(sb->data_size);
1174 /* remove '1 ||' when we can set offset via sysfs */
1175 if (1 || (room < 3*2 &&
1176 __le32_to_cpu(sb->max_dev) <= 384)) {
1177 room = 3*2;
1178 offset = 1*2;
1179 } else {
1180 offset = 0; /* means movable offset */
1181 }
1182 }
1183 break;
1184 case 1:
1185 case 2: /* between superblock and data */
1186 if (may_change) {
1187 offset = 4*2;
1188 if (__le64_to_cpu(sb->size) >= 200*1024*1024*2)
1189 room = 128*2;
1190 else if (__le64_to_cpu(sb->size) > 8*1024*1024*2)
1191 room = 64*2;
1192 else
1193 room = 3*2;
1194 } else {
1195 room = __le64_to_cpu(sb->data_offset)
1196 - __le64_to_cpu(sb->super_offset);
1197 if (1 || __le32_to_cpu(sb->max_dev) <= 384) {
1198 room -= 2;
1199 offset = 2;
1200 } else {
1201 room -= 4*2;
1202 offset = 4*2;
1203 }
1204 }
1205 break;
1206 }
1bf4e2d9 1207
199171a2
NB
1208 if (chunk == UnSet && room > 128*2)
1209 /* Limit to 128K of bitmap when chunk size not requested */
1210 room = 128*2;
1bf4e2d9 1211
199171a2 1212 max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8;
34163fc7
NB
1213
1214 min_chunk = 4096; /* sub-page chunks don't work yet.. */
f9c25f1d 1215 bits = (size*512)/min_chunk +1;
34163fc7
NB
1216 while (bits > max_bits) {
1217 min_chunk *= 2;
1218 bits = (bits+1)/2;
1219 }
1220 if (chunk == UnSet)
1221 chunk = min_chunk;
1222 else if (chunk < min_chunk)
1223 return 0; /* chunk size too small */
21e92547
NB
1224 if (chunk == 0) /* rounding problem */
1225 return 0;
34163fc7 1226
199171a2
NB
1227 if (offset == 0) {
1228 bits = (size*512) / chunk + 1;
1229 room = ((bits+7)/8 + sizeof(bitmap_super_t) +511)/512;
1230 offset = -room;
1231 }
1232
1233 sb->bitmap_offset = __cpu_to_le32(offset);
34163fc7
NB
1234
1235 sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1);
29e766a5 1236 memset(bms, 0, sizeof(*bms));
34163fc7 1237 bms->magic = __cpu_to_le32(BITMAP_MAGIC);
dcec9ee5 1238 bms->version = __cpu_to_le32(major);
34163fc7
NB
1239 uuid_from_super1((int*)bms->uuid, sb);
1240 bms->chunksize = __cpu_to_le32(chunk);
1241 bms->daemon_sleep = __cpu_to_le32(delay);
f9c25f1d 1242 bms->sync_size = __cpu_to_le64(size);
34163fc7
NB
1243 bms->write_behind = __cpu_to_le32(write_behind);
1244
199171a2 1245 *chunkp = chunk;
34163fc7
NB
1246 return 1;
1247}
1248
1249
14263cf1 1250static void locate_bitmap1(struct supertype *st, int fd, void *sbv)
34163fc7 1251{
34163fc7 1252 unsigned long long offset;
1e0d770c
NB
1253 struct mdp_superblock_1 *sb;
1254 int mustfree = 0;
34163fc7 1255
1e0d770c
NB
1256 if (!sbv) {
1257 if (st->ss->load_super(st, fd, &sbv, NULL))
f6d75de8 1258 return; /* no error I hope... */
1e0d770c
NB
1259 mustfree = 1;
1260 }
1261 sb = sbv;
e478dc86 1262
1bf4e2d9
NB
1263 offset = __le64_to_cpu(sb->super_offset);
1264 offset += (long) __le32_to_cpu(sb->bitmap_offset);
1e0d770c 1265 if (mustfree)
f6d75de8 1266 free(sb);
1bf4e2d9 1267 lseek64(fd, offset<<9, 0);
34163fc7
NB
1268}
1269
14263cf1 1270static int write_bitmap1(struct supertype *st, int fd, void *sbv)
34163fc7
NB
1271{
1272 struct mdp_superblock_1 *sb = sbv;
1bf4e2d9 1273 bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024);
34163fc7
NB
1274 int rv = 0;
1275
1276 int towrite, n;
1277 char buf[4096];
1278
f6d75de8 1279 locate_bitmap1(st, fd, sbv);
34163fc7 1280
1e0d770c
NB
1281 if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) !=
1282 sizeof(bitmap_super_t))
1283 return -2;
1bf4e2d9
NB
1284 towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9);
1285 towrite = (towrite+7) >> 3; /* bits to bytes */
34163fc7
NB
1286 memset(buf, 0xff, sizeof(buf));
1287 while (towrite > 0) {
1288 n = towrite;
1289 if (n > sizeof(buf))
1290 n = sizeof(buf);
1291 n = write(fd, buf, n);
1292 if (n > 0)
1293 towrite -= n;
1294 else
1295 break;
1296 }
1297 fsync(fd);
1298 if (towrite)
1299 rv = -2;
1300
1301 return rv;
82d9eba6
NB
1302}
1303
1304struct superswitch super1 = {
c7654afc 1305#ifndef MDASSEMBLE
82d9eba6
NB
1306 .examine_super = examine_super1,
1307 .brief_examine_super = brief_examine_super1,
1308 .detail_super = detail_super1,
1309 .brief_detail_super = brief_detail_super1,
c7654afc 1310#endif
83b6208e 1311 .match_home = match_home1,
82d9eba6
NB
1312 .uuid_from_super = uuid_from_super1,
1313 .getinfo_super = getinfo_super1,
1314 .update_super = update_super1,
82d9eba6
NB
1315 .init_super = init_super1,
1316 .add_to_super = add_to_super1,
1317 .store_super = store_super1,
1318 .write_init_super = write_init_super1,
1319 .compare_super = compare_super1,
1320 .load_super = load_super1,
1321 .match_metadata_desc = match_metadata_desc1,
1322 .avail_size = avail_size1,
34163fc7
NB
1323 .add_internal_bitmap = add_internal_bitmap1,
1324 .locate_bitmap = locate_bitmap1,
1325 .write_bitmap = write_bitmap1,
82d9eba6 1326 .major = 1,
f277ce36
NB
1327#if __BYTE_ORDER == BIG_ENDIAN
1328 .swapuuid = 0,
1329#else
1330 .swapuuid = 1,
1331#endif
82d9eba6 1332};