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Commit | Line | Data |
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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 | */ | |
38 | struct 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 |
97 | struct 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 |
113 | static 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 | ||
5ea022a1 N |
144 | static char abuf[4096+4096]; |
145 | static int aread(int fd, void *buf, int len) | |
146 | { | |
147 | /* aligned read. | |
148 | * On devices with a 4K sector size, we need to read | |
149 | * the full sector and copy relevant bits into | |
150 | * the buffer | |
151 | */ | |
152 | int bsize; | |
153 | char *b; | |
154 | int n; | |
155 | if (ioctl(fd, BLKSSZGET, &bsize) != 0 || | |
156 | bsize <= len) | |
157 | return read(fd, buf, len); | |
158 | if (bsize > 4096) | |
159 | return -1; | |
160 | b = (char*)(((long)(abuf+4096))&~4095UL); | |
161 | ||
162 | n = read(fd, b, bsize); | |
163 | if (n <= 0) | |
164 | return n; | |
165 | lseek(fd, len - n, 1); | |
166 | if (n > len) | |
167 | n = len; | |
168 | memcpy(buf, b, n); | |
169 | return n; | |
170 | } | |
171 | ||
172 | static int awrite(int fd, void *buf, int len) | |
173 | { | |
174 | /* aligned write. | |
175 | * On devices with a 4K sector size, we need to write | |
176 | * the full sector. We pre-read if the sector is larger | |
177 | * than the write. | |
178 | * The address must be sector-aligned. | |
179 | */ | |
180 | int bsize; | |
181 | char *b; | |
182 | int n; | |
183 | if (ioctl(fd, BLKSSZGET, &bsize) != 0 || | |
184 | bsize <= len) | |
185 | return write(fd, buf, len); | |
186 | if (bsize > 4096) | |
187 | return -1; | |
188 | b = (char*)(((long)(abuf+4096))&~4095UL); | |
189 | ||
190 | n = read(fd, b, bsize); | |
191 | if (n <= 0) | |
192 | return n; | |
193 | lseek(fd, -n, 1); | |
194 | memcpy(b, buf, len); | |
195 | n = write(fd, b, bsize); | |
196 | if (n <= 0) | |
197 | return n; | |
198 | lseek(fd, len - n, 1); | |
199 | return len; | |
200 | } | |
201 | ||
c7654afc | 202 | #ifndef MDASSEMBLE |
3da92f27 | 203 | static void examine_super1(struct supertype *st, char *homehost) |
82d9eba6 | 204 | { |
3da92f27 | 205 | struct mdp_superblock_1 *sb = st->sb; |
82d9eba6 NB |
206 | time_t atime; |
207 | int d; | |
e8e1c176 | 208 | int role; |
82d9eba6 NB |
209 | int i; |
210 | char *c; | |
a1cbd7d0 | 211 | int l = homehost ? strlen(homehost) : 0; |
83205b64 | 212 | int layout; |
a17a3de3 | 213 | unsigned long long sb_offset; |
82d9eba6 NB |
214 | |
215 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
a17a3de3 DL |
216 | printf(" Version : 1"); |
217 | sb_offset = __le64_to_cpu(sb->super_offset); | |
218 | if (sb_offset <= 4) | |
219 | printf(".1\n"); | |
220 | else if (sb_offset <= 8) | |
221 | printf(".2\n"); | |
222 | else | |
223 | printf(".0\n"); | |
91eedefc | 224 | printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); |
82d9eba6 NB |
225 | printf(" Array UUID : "); |
226 | for (i=0; i<16; i++) { | |
82d9eba6 | 227 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 228 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 NB |
229 | } |
230 | printf("\n"); | |
a1cbd7d0 NB |
231 | printf(" Name : %.32s", sb->set_name); |
232 | if (l > 0 && l < 32 && | |
233 | sb->set_name[l] == ':' && | |
234 | strncmp(sb->set_name, homehost, l) == 0) | |
235 | printf(" (local to host %s)", homehost); | |
236 | printf("\n"); | |
82d9eba6 NB |
237 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; |
238 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
239 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
240 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
241 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
242 | printf("\n"); | |
5cda0964 | 243 | printf(" Avail Dev Size : %llu%s\n", |
2fb749d1 NB |
244 | (unsigned long long)__le64_to_cpu(sb->data_size), |
245 | human_size(__le64_to_cpu(sb->data_size)<<9)); | |
b674b5b8 NB |
246 | if (__le32_to_cpu(sb->level) >= 0) { |
247 | int ddsks=0; | |
248 | switch(__le32_to_cpu(sb->level)) { | |
249 | case 1: ddsks=1;break; | |
250 | case 4: | |
83205b64 NB |
251 | case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break; |
252 | case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break; | |
253 | case 10: | |
254 | layout = __le32_to_cpu(sb->layout); | |
255 | ddsks = __le32_to_cpu(sb->raid_disks) | |
256 | / (layout&255) / ((layout>>8)&255); | |
b674b5b8 NB |
257 | } |
258 | if (ddsks) | |
83205b64 | 259 | printf(" Array Size : %llu%s\n", |
c1c05f7f | 260 | ddsks*(unsigned long long)__le64_to_cpu(sb->size), |
83205b64 | 261 | human_size(ddsks*__le64_to_cpu(sb->size)<<9)); |
b674b5b8 | 262 | if (sb->size != sb->data_size) |
5cda0964 | 263 | printf(" Used Dev Size : %llu%s\n", |
83205b64 NB |
264 | (unsigned long long)__le64_to_cpu(sb->size), |
265 | human_size(__le64_to_cpu(sb->size)<<9)); | |
b674b5b8 | 266 | } |
82d9eba6 | 267 | if (sb->data_offset) |
199171a2 NB |
268 | printf(" Data Offset : %llu sectors\n", |
269 | (unsigned long long)__le64_to_cpu(sb->data_offset)); | |
270 | printf(" Super Offset : %llu sectors\n", | |
271 | (unsigned long long)__le64_to_cpu(sb->super_offset)); | |
d2cd3ffc NB |
272 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) |
273 | printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset)); | |
a3fd117c | 274 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); |
82d9eba6 NB |
275 | printf(" Device UUID : "); |
276 | for (i=0; i<16; i++) { | |
82d9eba6 | 277 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 278 | printf("%02x", sb->device_uuid[i]); |
82d9eba6 NB |
279 | } |
280 | printf("\n"); | |
b674b5b8 | 281 | printf("\n"); |
91eedefc NB |
282 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { |
283 | printf("Internal Bitmap : %ld sectors from superblock\n", | |
68754bd1 | 284 | (long)(int32_t)__le32_to_cpu(sb->bitmap_offset)); |
8fac0577 | 285 | } |
b674b5b8 | 286 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { |
1e0d770c | 287 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2, |
b674b5b8 NB |
288 | human_size(__le64_to_cpu(sb->reshape_position)<<9)); |
289 | if (__le32_to_cpu(sb->delta_disks)) { | |
290 | printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks)); | |
291 | if (__le32_to_cpu(sb->delta_disks)) | |
292 | printf(" (%d->%d)\n", | |
293 | __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks), | |
294 | __le32_to_cpu(sb->raid_disks)); | |
295 | else | |
296 | printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks), | |
297 | __le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks)); | |
298 | } | |
299 | if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { | |
300 | c = map_num(pers, __le32_to_cpu(sb->new_level)); | |
301 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
302 | } | |
303 | if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) { | |
304 | if (__le32_to_cpu(sb->level) == 5) { | |
305 | c = map_num(r5layout, __le32_to_cpu(sb->new_layout)); | |
306 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
307 | } | |
308 | if (__le32_to_cpu(sb->level) == 10) { | |
e4965ef8 N |
309 | printf(" New Layout :"); |
310 | print_r10_layout(__le32_to_cpu(sb->new_layout)); | |
311 | printf("\n"); | |
b674b5b8 NB |
312 | } |
313 | } | |
314 | if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) | |
315 | printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); | |
316 | printf("\n"); | |
317 | } | |
dfd4d8ee NB |
318 | if (sb->devflags) { |
319 | printf(" Flags :"); | |
34163fc7 | 320 | if (sb->devflags & WriteMostly1) |
dfd4d8ee NB |
321 | printf(" write-mostly"); |
322 | printf("\n"); | |
323 | } | |
82d9eba6 NB |
324 | |
325 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
326 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
327 | ||
328 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
329 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
330 | else | |
331 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
332 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
570c0542 | 333 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
334 | printf("\n"); |
335 | if (__le32_to_cpu(sb->level) == 5) { | |
336 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
337 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
338 | } | |
265e0f17 NB |
339 | if (__le32_to_cpu(sb->level) == 10) { |
340 | int lo = __le32_to_cpu(sb->layout); | |
e4965ef8 N |
341 | printf(" Layout :"); |
342 | print_r10_layout(lo); | |
343 | printf("\n"); | |
265e0f17 | 344 | } |
82d9eba6 NB |
345 | switch(__le32_to_cpu(sb->level)) { |
346 | case 0: | |
347 | case 4: | |
348 | case 5: | |
d2cd3ffc NB |
349 | case 6: |
350 | case 10: | |
b674b5b8 | 351 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); |
82d9eba6 NB |
352 | break; |
353 | case -1: | |
b674b5b8 | 354 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); |
82d9eba6 NB |
355 | break; |
356 | default: break; | |
357 | } | |
358 | printf("\n"); | |
e8e1c176 N |
359 | #if 0 |
360 | /* This turns out to just be confusing */ | |
c3684618 NB |
361 | printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number)); |
362 | for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--) | |
363 | if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff) | |
364 | break; | |
365 | for (d=0; d < i; d++) { | |
366 | int role = __le16_to_cpu(sb->dev_roles[d]); | |
367 | if (d) printf(", "); | |
368 | if (role == 0xffff) printf("empty"); | |
369 | else if(role == 0xfffe) printf("failed"); | |
370 | else printf("%d", role); | |
371 | } | |
372 | printf(")\n"); | |
e8e1c176 N |
373 | #endif |
374 | printf(" Device Role : "); | |
375 | d = __le32_to_cpu(sb->dev_number); | |
376 | if (d < sb->raid_disks) | |
377 | role = __le16_to_cpu(sb->dev_roles[d]); | |
378 | else | |
379 | role = 0xFFFF; | |
380 | if (role >= 0xFFFE) | |
381 | printf("spare\n"); | |
382 | else | |
383 | printf("Active device %d\n", role); | |
384 | ||
82d9eba6 NB |
385 | printf(" Array State : "); |
386 | for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { | |
387 | int cnt = 0; | |
388 | int me = 0; | |
389 | int i; | |
390 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
391 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
392 | if (role == d) { | |
393 | if (i == __le32_to_cpu(sb->dev_number)) | |
394 | me = 1; | |
395 | cnt++; | |
396 | } | |
397 | } | |
398 | if (cnt > 1) printf("?"); | |
e8e1c176 N |
399 | else if (cnt == 1) printf("A"); |
400 | else printf ("."); | |
82d9eba6 | 401 | } |
e8e1c176 N |
402 | #if 0 |
403 | /* This is confusing too */ | |
6fbba4c9 | 404 | faulty = 0; |
82d9eba6 NB |
405 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
406 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
6fbba4c9 NB |
407 | if (role == 0xFFFE) |
408 | faulty++; | |
82d9eba6 | 409 | } |
82d9eba6 | 410 | if (faulty) printf(" %d failed", faulty); |
e8e1c176 N |
411 | #endif |
412 | printf(" ('A' == active, '.' == missing)"); | |
82d9eba6 NB |
413 | printf("\n"); |
414 | } | |
415 | ||
416 | ||
3da92f27 | 417 | static void brief_examine_super1(struct supertype *st) |
82d9eba6 | 418 | { |
3da92f27 | 419 | struct mdp_superblock_1 *sb = st->sb; |
82d9eba6 | 420 | int i; |
a17a3de3 | 421 | unsigned long long sb_offset; |
2998bc01 | 422 | char *nm; |
b015e6c2 | 423 | char *c=map_num(pers, __le32_to_cpu(sb->level)); |
2998bc01 NB |
424 | |
425 | nm = strchr(sb->set_name, ':'); | |
426 | if (nm) | |
427 | nm++; | |
428 | else if (sb->set_name[0]) | |
429 | nm = sb->set_name; | |
430 | else | |
cf8de691 | 431 | nm = NULL; |
82d9eba6 | 432 | |
cf8de691 N |
433 | printf("ARRAY%s%s level=%s ", |
434 | nm ? " /dev/md/":"", nm, | |
435 | c?c:"-unknown-"); | |
a17a3de3 DL |
436 | sb_offset = __le64_to_cpu(sb->super_offset); |
437 | if (sb_offset <= 4) | |
438 | printf("metadata=1.1 "); | |
439 | else if (sb_offset <= 8) | |
440 | printf("metadata=1.2 "); | |
441 | else | |
442 | printf("metadata=1.0 "); | |
443 | printf("num-devices=%d UUID=", __le32_to_cpu(sb->raid_disks)); | |
82d9eba6 | 444 | for (i=0; i<16; i++) { |
82d9eba6 | 445 | if ((i&3)==0 && i != 0) printf(":"); |
b7a708af | 446 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 | 447 | } |
947fd4dd NB |
448 | if (sb->set_name[0]) |
449 | printf(" name=%.32s", sb->set_name); | |
82d9eba6 NB |
450 | printf("\n"); |
451 | } | |
452 | ||
0d726f17 KS |
453 | static void export_examine_super1(struct supertype *st) |
454 | { | |
455 | struct mdp_superblock_1 *sb = st->sb; | |
456 | int i; | |
457 | int len = 32; | |
458 | ||
459 | printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level))); | |
460 | printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks)); | |
461 | for (i=0; i<32; i++) | |
462 | if (sb->set_name[i] == '\n' || | |
463 | sb->set_name[i] == '\0') { | |
464 | len = i; | |
465 | break; | |
466 | } | |
467 | if (len) | |
468 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
469 | printf("MD_UUID="); | |
470 | for (i=0; i<16; i++) { | |
471 | if ((i&3)==0 && i != 0) printf(":"); | |
472 | printf("%02x", sb->set_uuid[i]); | |
473 | } | |
474 | printf("\n"); | |
475 | printf("MD_UPDATE_TIME=%llu\n", | |
476 | __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL); | |
477 | printf("MD_DEV_UUID="); | |
478 | for (i=0; i<16; i++) { | |
479 | if ((i&3)==0 && i != 0) printf(":"); | |
480 | printf("%02x", sb->device_uuid[i]); | |
481 | } | |
482 | printf("\n"); | |
483 | printf("MD_EVENTS=%llu\n", | |
484 | (unsigned long long)__le64_to_cpu(sb->events)); | |
485 | } | |
486 | ||
3da92f27 | 487 | static void detail_super1(struct supertype *st, char *homehost) |
82d9eba6 | 488 | { |
3da92f27 | 489 | struct mdp_superblock_1 *sb = st->sb; |
82d9eba6 | 490 | int i; |
b6750aa8 | 491 | int l = homehost ? strlen(homehost) : 0; |
82d9eba6 | 492 | |
b6750aa8 NB |
493 | printf(" Name : %.32s", sb->set_name); |
494 | if (l > 0 && l < 32 && | |
495 | sb->set_name[l] == ':' && | |
496 | strncmp(sb->set_name, homehost, l) == 0) | |
497 | printf(" (local to host %s)", homehost); | |
498 | printf("\n UUID : "); | |
82d9eba6 | 499 | for (i=0; i<16; i++) { |
82d9eba6 | 500 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 501 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 | 502 | } |
570c0542 | 503 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); |
82d9eba6 NB |
504 | } |
505 | ||
3da92f27 | 506 | static void brief_detail_super1(struct supertype *st) |
82d9eba6 | 507 | { |
3da92f27 | 508 | struct mdp_superblock_1 *sb = st->sb; |
82d9eba6 NB |
509 | int i; |
510 | ||
947fd4dd NB |
511 | if (sb->set_name[0]) |
512 | printf(" name=%.32s", sb->set_name); | |
82d9eba6 NB |
513 | printf(" UUID="); |
514 | for (i=0; i<16; i++) { | |
82d9eba6 | 515 | if ((i&3)==0 && i != 0) printf(":"); |
34163fc7 | 516 | printf("%02x", sb->set_uuid[i]); |
82d9eba6 NB |
517 | } |
518 | } | |
519 | ||
0d726f17 | 520 | static void export_detail_super1(struct supertype *st) |
54bad364 | 521 | { |
3da92f27 | 522 | struct mdp_superblock_1 *sb = st->sb; |
54bad364 KS |
523 | int i; |
524 | int len = 32; | |
525 | ||
526 | for (i=0; i<32; i++) | |
527 | if (sb->set_name[i] == '\n' || | |
528 | sb->set_name[i] == '\0') { | |
529 | len = i; | |
530 | break; | |
531 | } | |
532 | if (len) | |
533 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
54bad364 KS |
534 | } |
535 | ||
c7654afc NB |
536 | #endif |
537 | ||
3da92f27 | 538 | static int match_home1(struct supertype *st, char *homehost) |
83b6208e | 539 | { |
3da92f27 | 540 | struct mdp_superblock_1 *sb = st->sb; |
83b6208e NB |
541 | int l = homehost ? strlen(homehost) : 0; |
542 | ||
543 | return (l > 0 && l < 32 && | |
544 | sb->set_name[l] == ':' && | |
545 | strncmp(sb->set_name, homehost, l) == 0); | |
546 | } | |
547 | ||
3da92f27 | 548 | static void uuid_from_super1(struct supertype *st, int uuid[4]) |
82d9eba6 | 549 | { |
3da92f27 | 550 | struct mdp_superblock_1 *super = st->sb; |
82d9eba6 NB |
551 | char *cuuid = (char*)uuid; |
552 | int i; | |
553 | for (i=0; i<16; i++) | |
554 | cuuid[i] = super->set_uuid[i]; | |
555 | } | |
556 | ||
3da92f27 | 557 | static void getinfo_super1(struct supertype *st, struct mdinfo *info) |
82d9eba6 | 558 | { |
3da92f27 | 559 | struct mdp_superblock_1 *sb = st->sb; |
82d9eba6 NB |
560 | int working = 0; |
561 | int i; | |
562 | int role; | |
563 | ||
564 | info->array.major_version = 1; | |
b8ac1967 | 565 | info->array.minor_version = st->minor_version; |
82d9eba6 NB |
566 | info->array.patch_version = 0; |
567 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
568 | info->array.level = __le32_to_cpu(sb->level); | |
265e0f17 | 569 | info->array.layout = __le32_to_cpu(sb->layout); |
82d9eba6 NB |
570 | info->array.md_minor = -1; |
571 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
353632d9 | 572 | info->array.utime = __le64_to_cpu(sb->utime); |
bed256c2 | 573 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; |
4855f95c NB |
574 | info->array.state = |
575 | (__le64_to_cpu(sb->resync_offset) >= __le64_to_cpu(sb->size)) | |
576 | ? 1 : 0; | |
353632d9 NB |
577 | |
578 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
579 | info->component_size = __le64_to_cpu(sb->size); | |
82d9eba6 NB |
580 | |
581 | info->disk.major = 0; | |
582 | info->disk.minor = 0; | |
fbf8a0b7 | 583 | info->disk.number = __le32_to_cpu(sb->dev_number); |
82d9eba6 NB |
584 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || |
585 | __le32_to_cpu(sb->max_dev) > 512) | |
586 | role = 0xfffe; | |
587 | else | |
588 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
589 | ||
590 | info->disk.raid_disk = -1; | |
591 | switch(role) { | |
592 | case 0xFFFF: | |
593 | info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ | |
594 | break; | |
595 | case 0xFFFE: | |
596 | info->disk.state = 1; /* faulty */ | |
597 | break; | |
598 | default: | |
599 | info->disk.state = 6; /* active and in sync */ | |
600 | info->disk.raid_disk = role; | |
601 | } | |
602 | info->events = __le64_to_cpu(sb->events); | |
1522c538 | 603 | sprintf(info->text_version, "1.%d", st->minor_version); |
a67dd8cc | 604 | info->safe_mode_delay = 200; |
82d9eba6 NB |
605 | |
606 | memcpy(info->uuid, sb->set_uuid, 16); | |
607 | ||
31317663 NB |
608 | strncpy(info->name, sb->set_name, 32); |
609 | info->name[32] = 0; | |
947fd4dd | 610 | |
353632d9 NB |
611 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { |
612 | info->reshape_active = 1; | |
613 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
614 | info->new_level = __le32_to_cpu(sb->new_level); | |
615 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
616 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
bed256c2 | 617 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; |
353632d9 NB |
618 | } else |
619 | info->reshape_active = 0; | |
620 | ||
82d9eba6 NB |
621 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
622 | role = __le16_to_cpu(sb->dev_roles[i]); | |
fbf8a0b7 | 623 | if (/*role == 0xFFFF || */role < info->array.raid_disks) |
82d9eba6 NB |
624 | working++; |
625 | } | |
626 | ||
627 | info->array.working_disks = working; | |
628 | } | |
629 | ||
68c7d6d7 | 630 | static int update_super1(struct supertype *st, struct mdinfo *info, |
3da92f27 | 631 | char *update, |
e5eac01f NB |
632 | char *devname, int verbose, |
633 | int uuid_set, char *homehost) | |
82d9eba6 | 634 | { |
c4d831e1 NB |
635 | /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made. |
636 | * For others, the return value is ignored. | |
637 | */ | |
82d9eba6 | 638 | int rv = 0; |
3da92f27 | 639 | struct mdp_superblock_1 *sb = st->sb; |
82d9eba6 | 640 | |
67a8c82d NB |
641 | if (strcmp(update, "force-one")==0) { |
642 | /* Not enough devices for a working array, | |
643 | * so bring this one up-to-date | |
644 | */ | |
c4d831e1 NB |
645 | if (sb->events != __cpu_to_le64(info->events)) |
646 | rv = 1; | |
6d3d5804 | 647 | sb->events = __cpu_to_le64(info->events); |
67a8c82d NB |
648 | } |
649 | if (strcmp(update, "force-array")==0) { | |
650 | /* Degraded array and 'force' requests to | |
651 | * maybe need to mark it 'clean'. | |
652 | */ | |
82d9eba6 NB |
653 | switch(__le32_to_cpu(sb->level)) { |
654 | case 5: case 4: case 6: | |
655 | /* need to force clean */ | |
c4d831e1 NB |
656 | if (sb->resync_offset != ~0ULL) |
657 | rv = 1; | |
82d9eba6 NB |
658 | sb->resync_offset = ~0ULL; |
659 | } | |
660 | } | |
661 | if (strcmp(update, "assemble")==0) { | |
662 | int d = info->disk.number; | |
663 | int want; | |
664 | if (info->disk.state == 6) | |
665 | want = __cpu_to_le32(info->disk.raid_disk); | |
666 | else | |
667 | want = 0xFFFF; | |
668 | if (sb->dev_roles[d] != want) { | |
669 | sb->dev_roles[d] = want; | |
670 | rv = 1; | |
671 | } | |
672 | } | |
f752781f NB |
673 | if (strcmp(update, "linear-grow-new") == 0) { |
674 | int i; | |
1c6cb603 | 675 | int rfd, fd; |
f752781f NB |
676 | int max = __le32_to_cpu(sb->max_dev); |
677 | ||
678 | for (i=0 ; i < max ; i++) | |
679 | if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe) | |
680 | break; | |
681 | sb->dev_number = __cpu_to_le32(i); | |
682 | info->disk.number = i; | |
683 | if (max >= __le32_to_cpu(sb->max_dev)) | |
684 | sb->max_dev = __cpu_to_le32(max+1); | |
685 | ||
686 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
687 | read(rfd, sb->device_uuid, 16) != 16) { | |
688 | *(__u32*)(sb->device_uuid) = random(); | |
689 | *(__u32*)(sb->device_uuid+4) = random(); | |
690 | *(__u32*)(sb->device_uuid+8) = random(); | |
691 | *(__u32*)(sb->device_uuid+12) = random(); | |
692 | } | |
693 | ||
694 | sb->dev_roles[i] = | |
695 | __cpu_to_le16(info->disk.raid_disk); | |
1c6cb603 N |
696 | |
697 | fd = open(devname, O_RDONLY); | |
698 | if (fd >= 0) { | |
699 | unsigned long long ds; | |
700 | get_dev_size(fd, devname, &ds); | |
701 | close(fd); | |
702 | ds >>= 9; | |
703 | if (__le64_to_cpu(sb->super_offset) < | |
704 | __le64_to_cpu(sb->data_offset)) { | |
705 | sb->data_size = __cpu_to_le64( | |
706 | ds - __le64_to_cpu(sb->data_offset)); | |
707 | } else { | |
708 | ds -= 8*2; | |
709 | ds &= ~(unsigned long long)(4*2-1); | |
710 | sb->super_offset = __cpu_to_le64(ds); | |
711 | sb->data_size = __cpu_to_le64( | |
712 | ds - __le64_to_cpu(sb->data_offset)); | |
713 | } | |
714 | } | |
f752781f NB |
715 | } |
716 | if (strcmp(update, "linear-grow-update") == 0) { | |
82d9eba6 | 717 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); |
f752781f NB |
718 | sb->dev_roles[info->disk.number] = |
719 | __cpu_to_le16(info->disk.raid_disk); | |
82d9eba6 NB |
720 | } |
721 | if (strcmp(update, "resync") == 0) { | |
722 | /* make sure resync happens */ | |
434b7755 | 723 | sb->resync_offset = 0ULL; |
82d9eba6 | 724 | } |
14263cf1 | 725 | if (strcmp(update, "uuid") == 0) { |
350f29f9 | 726 | copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid); |
bf4fb153 | 727 | |
14263cf1 NB |
728 | if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) { |
729 | struct bitmap_super_s *bm; | |
3da92f27 | 730 | bm = (struct bitmap_super_s*)(st->sb+1024); |
bf4fb153 | 731 | memcpy(bm->uuid, sb->set_uuid, 16); |
14263cf1 NB |
732 | } |
733 | } | |
0237e0ca NB |
734 | if (strcmp(update, "homehost") == 0 && |
735 | homehost) { | |
736 | char *c; | |
737 | update = "name"; | |
738 | c = strchr(sb->set_name, ':'); | |
739 | if (c) | |
740 | strncpy(info->name, c+1, 31 - (c-sb->set_name)); | |
741 | else | |
742 | strncpy(info->name, sb->set_name, 32); | |
26a0b8fd | 743 | info->name[32] = 0; |
0237e0ca | 744 | } |
c4f12c13 NB |
745 | if (strcmp(update, "name") == 0) { |
746 | if (info->name[0] == 0) | |
747 | sprintf(info->name, "%d", info->array.md_minor); | |
748 | memset(sb->set_name, 0, sizeof(sb->set_name)); | |
749 | if (homehost && | |
750 | strchr(info->name, ':') == NULL && | |
751 | strlen(homehost)+1+strlen(info->name) < 32) { | |
752 | strcpy(sb->set_name, homehost); | |
753 | strcat(sb->set_name, ":"); | |
754 | strcat(sb->set_name, info->name); | |
755 | } else | |
756 | strcpy(sb->set_name, info->name); | |
757 | } | |
bee8ec56 NB |
758 | if (strcmp(update, "devicesize") == 0 && |
759 | __le64_to_cpu(sb->super_offset) < | |
760 | __le64_to_cpu(sb->data_offset)) { | |
761 | /* set data_size to device size less data_offset */ | |
762 | struct misc_dev_info *misc = (struct misc_dev_info*) | |
6416d527 | 763 | (st->sb + 1024 + 512); |
eb9199fb NB |
764 | printf("Size was %llu\n", (unsigned long long) |
765 | __le64_to_cpu(sb->data_size)); | |
bee8ec56 NB |
766 | sb->data_size = __cpu_to_le64( |
767 | misc->device_size - __le64_to_cpu(sb->data_offset)); | |
eb9199fb NB |
768 | printf("Size is %llu\n", (unsigned long long) |
769 | __le64_to_cpu(sb->data_size)); | |
bee8ec56 | 770 | } |
353632d9 NB |
771 | if (strcmp(update, "_reshape_progress")==0) |
772 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
82d9eba6 NB |
773 | |
774 | sb->sb_csum = calc_sb_1_csum(sb); | |
775 | return rv; | |
776 | } | |
777 | ||
3da92f27 | 778 | static int init_super1(struct supertype *st, mdu_array_info_t *info, |
3d3dd91e | 779 | unsigned long long size, char *name, char *homehost, int *uuid) |
82d9eba6 | 780 | { |
6416d527 | 781 | struct mdp_superblock_1 *sb; |
82d9eba6 | 782 | int spares; |
34163fc7 | 783 | int rfd; |
05697ec1 | 784 | char defname[10]; |
6416d527 | 785 | |
3d2c4fc7 DW |
786 | if (posix_memalign((void**)&sb, 512, (1024 + 512 + |
787 | sizeof(struct misc_dev_info))) != 0) { | |
788 | fprintf(stderr, Name | |
789 | ": %s could not allocate superblock\n", __func__); | |
790 | return 0; | |
791 | } | |
82d9eba6 NB |
792 | memset(sb, 0, 1024); |
793 | ||
64557c33 | 794 | st->sb = sb; |
ba7eb04f | 795 | if (info == NULL) { |
82d9eba6 NB |
796 | /* zeroing superblock */ |
797 | return 0; | |
05697ec1 | 798 | } |
82d9eba6 NB |
799 | |
800 | spares = info->working_disks - info->active_disks; | |
801 | if (info->raid_disks + spares > 384) { | |
802 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
803 | info->raid_disks , spares, 384); | |
804 | return 0; | |
805 | } | |
806 | ||
82d9eba6 NB |
807 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); |
808 | sb->major_version = __cpu_to_le32(1); | |
809 | sb->feature_map = 0; | |
810 | sb->pad0 = 0; | |
34163fc7 | 811 | |
350f29f9 NB |
812 | if (uuid) |
813 | copy_uuid(sb->set_uuid, uuid, super1.swapuuid); | |
814 | else { | |
3d3dd91e NB |
815 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
816 | read(rfd, sb->set_uuid, 16) != 16) { | |
817 | *(__u32*)(sb->set_uuid) = random(); | |
818 | *(__u32*)(sb->set_uuid+4) = random(); | |
819 | *(__u32*)(sb->set_uuid+8) = random(); | |
820 | *(__u32*)(sb->set_uuid+12) = random(); | |
821 | } | |
822 | if (rfd >= 0) close(rfd); | |
34163fc7 | 823 | } |
82d9eba6 | 824 | |
05697ec1 NB |
825 | if (name == NULL || *name == 0) { |
826 | sprintf(defname, "%d", info->md_minor); | |
827 | name = defname; | |
828 | } | |
947fd4dd | 829 | memset(sb->set_name, 0, 32); |
05697ec1 NB |
830 | if (homehost && |
831 | strchr(name, ':')== NULL && | |
832 | strlen(homehost)+1+strlen(name) < 32) { | |
833 | strcpy(sb->set_name, homehost); | |
834 | strcat(sb->set_name, ":"); | |
835 | strcat(sb->set_name, name); | |
836 | } else | |
837 | strcpy(sb->set_name, name); | |
82d9eba6 NB |
838 | |
839 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
840 | sb->level = __cpu_to_le32(info->level); | |
ea329559 | 841 | sb->layout = __cpu_to_le32(info->layout); |
5dd497ee | 842 | sb->size = __cpu_to_le64(size*2ULL); |
82d9eba6 NB |
843 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); |
844 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
845 | ||
846 | sb->data_offset = __cpu_to_le64(0); | |
847 | sb->data_size = __cpu_to_le64(0); | |
848 | sb->super_offset = __cpu_to_le64(0); | |
849 | sb->recovery_offset = __cpu_to_le64(0); | |
850 | ||
851 | sb->utime = sb->ctime; | |
852 | sb->events = __cpu_to_le64(1); | |
34321279 | 853 | if (info->state & (1<<MD_SB_CLEAN)) |
82d9eba6 NB |
854 | sb->resync_offset = ~0ULL; |
855 | else | |
856 | sb->resync_offset = 0; | |
34163fc7 | 857 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ |
82d9eba6 NB |
858 | sizeof(sb->dev_roles[0])); |
859 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
860 | ||
861 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
862 | ||
82d9eba6 NB |
863 | return 1; |
864 | } | |
865 | ||
111d01fc NB |
866 | struct devinfo { |
867 | int fd; | |
868 | char *devname; | |
869 | mdu_disk_info_t disk; | |
870 | struct devinfo *next; | |
871 | }; | |
0e600426 | 872 | #ifndef MDASSEMBLE |
82d9eba6 | 873 | /* Add a device to the superblock being created */ |
f20c3968 | 874 | static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk, |
111d01fc | 875 | int fd, char *devname) |
82d9eba6 | 876 | { |
3da92f27 | 877 | struct mdp_superblock_1 *sb = st->sb; |
82d9eba6 | 878 | __u16 *rp = sb->dev_roles + dk->number; |
111d01fc NB |
879 | struct devinfo *di, **dip; |
880 | ||
dfd4d8ee | 881 | if ((dk->state & 6) == 6) /* active, sync */ |
82d9eba6 | 882 | *rp = __cpu_to_le16(dk->raid_disk); |
412ca2e5 | 883 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ |
82d9eba6 | 884 | *rp = 0xffff; |
34163fc7 | 885 | else |
82d9eba6 | 886 | *rp = 0xfffe; |
111d01fc | 887 | |
9df04a4f N |
888 | if (dk->number >= __le32_to_cpu(sb->max_dev) && |
889 | __le32_to_cpu(sb->max_dev) < 384) | |
890 | sb->max_dev = __cpu_to_le32(dk->number+1); | |
8844e291 | 891 | |
d2ca6449 NB |
892 | sb->dev_number = __cpu_to_le32(dk->number); |
893 | sb->sb_csum = calc_sb_1_csum(sb); | |
894 | ||
111d01fc NB |
895 | dip = (struct devinfo **)&st->info; |
896 | while (*dip) | |
897 | dip = &(*dip)->next; | |
898 | di = malloc(sizeof(struct devinfo)); | |
899 | di->fd = fd; | |
900 | di->devname = devname; | |
901 | di->disk = *dk; | |
902 | di->next = NULL; | |
903 | *dip = di; | |
f20c3968 DW |
904 | |
905 | return 0; | |
82d9eba6 | 906 | } |
0e600426 | 907 | #endif |
82d9eba6 | 908 | |
3da92f27 | 909 | static void locate_bitmap1(struct supertype *st, int fd); |
14263cf1 | 910 | |
3da92f27 | 911 | static int store_super1(struct supertype *st, int fd) |
82d9eba6 | 912 | { |
3da92f27 | 913 | struct mdp_superblock_1 *sb = st->sb; |
6fbba4c9 | 914 | unsigned long long sb_offset; |
82d9eba6 | 915 | int sbsize; |
5dd497ee | 916 | unsigned long long dsize; |
96395475 | 917 | |
beae1dfe NB |
918 | if (!get_dev_size(fd, NULL, &dsize)) |
919 | return 1; | |
920 | ||
921 | dsize >>= 9; | |
96395475 | 922 | |
5dd497ee | 923 | if (dsize < 24) |
96395475 NB |
924 | return 2; |
925 | ||
926 | /* | |
927 | * Calculate the position of the superblock. | |
928 | * It is always aligned to a 4K boundary and | |
929 | * depending on minor_version, it can be: | |
930 | * 0: At least 8K, but less than 12K, from end of device | |
931 | * 1: At start of device | |
932 | * 2: 4K from start of device. | |
933 | */ | |
934 | switch(st->minor_version) { | |
935 | case 0: | |
5dd497ee | 936 | sb_offset = dsize; |
96395475 NB |
937 | sb_offset -= 8*2; |
938 | sb_offset &= ~(4*2-1); | |
939 | break; | |
940 | case 1: | |
6fbba4c9 | 941 | sb_offset = 0; |
96395475 NB |
942 | break; |
943 | case 2: | |
944 | sb_offset = 4*2; | |
945 | break; | |
946 | default: | |
947 | return -EINVAL; | |
948 | } | |
949 | ||
82d9eba6 | 950 | |
34163fc7 | 951 | |
6fbba4c9 NB |
952 | if (sb_offset != __le64_to_cpu(sb->super_offset) && |
953 | 0 != __le64_to_cpu(sb->super_offset) | |
96395475 NB |
954 | ) { |
955 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
956 | abort(); | |
957 | } | |
82d9eba6 | 958 | |
6fbba4c9 | 959 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) |
82d9eba6 NB |
960 | return 3; |
961 | ||
962 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
6416d527 | 963 | sbsize = (sbsize+511)&(~511UL); |
82d9eba6 | 964 | |
5ea022a1 | 965 | if (awrite(fd, sb, sbsize) != sbsize) |
82d9eba6 NB |
966 | return 4; |
967 | ||
14263cf1 NB |
968 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { |
969 | struct bitmap_super_s *bm = (struct bitmap_super_s*) | |
41a3b72a | 970 | (((char*)sb)+1024); |
14263cf1 | 971 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { |
3da92f27 | 972 | locate_bitmap1(st, fd); |
5ea022a1 N |
973 | if (awrite(fd, bm, sizeof(*bm)) != |
974 | sizeof(*bm)) | |
9fca7d62 | 975 | return 5; |
14263cf1 NB |
976 | } |
977 | } | |
570c0542 | 978 | fsync(fd); |
82d9eba6 NB |
979 | return 0; |
980 | } | |
981 | ||
3da92f27 | 982 | static int load_super1(struct supertype *st, int fd, char *devname); |
892debc8 | 983 | |
2fb749d1 NB |
984 | static unsigned long choose_bm_space(unsigned long devsize) |
985 | { | |
986 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, | |
987 | * if bigger than 200Gig, save 128k | |
988 | */ | |
69646c14 | 989 | if (devsize < 64*2) return 0; |
2fb749d1 NB |
990 | if (devsize - 64*2 >= 200*1024*1024*2) |
991 | return 128*2; | |
992 | if (devsize - 4*2 > 8*1024*1024*2) | |
993 | return 64*2; | |
994 | return 4*2; | |
995 | } | |
996 | ||
111d01fc NB |
997 | #ifndef MDASSEMBLE |
998 | static int write_init_super1(struct supertype *st) | |
82d9eba6 | 999 | { |
3da92f27 NB |
1000 | struct mdp_superblock_1 *sb = st->sb; |
1001 | struct supertype refst; | |
dfe47e00 | 1002 | int rfd; |
111d01fc | 1003 | int rv = 0; |
199171a2 | 1004 | int bm_space; |
111d01fc | 1005 | struct devinfo *di; |
8fac0577 | 1006 | unsigned long long dsize, array_size; |
82d9eba6 NB |
1007 | long long sb_offset; |
1008 | ||
111d01fc NB |
1009 | for (di = st->info; di && ! rv ; di = di->next) { |
1010 | if (di->disk.state == 1) | |
1011 | continue; | |
a0c8a17f NB |
1012 | if (di->fd < 0) |
1013 | continue; | |
82d9eba6 | 1014 | |
111d01fc NB |
1015 | Kill(di->devname, 0, 1, 1); |
1016 | Kill(di->devname, 0, 1, 1); | |
82d9eba6 | 1017 | |
111d01fc NB |
1018 | sb->dev_number = __cpu_to_le32(di->disk.number); |
1019 | if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY)) | |
1020 | sb->devflags |= __cpu_to_le32(WriteMostly1); | |
892debc8 | 1021 | |
111d01fc NB |
1022 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
1023 | read(rfd, sb->device_uuid, 16) != 16) { | |
1024 | *(__u32*)(sb->device_uuid) = random(); | |
1025 | *(__u32*)(sb->device_uuid+4) = random(); | |
1026 | *(__u32*)(sb->device_uuid+8) = random(); | |
1027 | *(__u32*)(sb->device_uuid+12) = random(); | |
1028 | } | |
1029 | if (rfd >= 0) close(rfd); | |
1030 | sb->events = 0; | |
1031 | ||
1032 | refst =*st; | |
1033 | refst.sb = NULL; | |
1034 | if (load_super1(&refst, di->fd, NULL)==0) { | |
1035 | struct mdp_superblock_1 *refsb = refst.sb; | |
1036 | ||
1037 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
1038 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
1039 | /* same array, so preserve events and | |
1040 | * dev_number */ | |
1041 | sb->events = refsb->events; | |
1042 | /* bugs in 2.6.17 and earlier mean the | |
1043 | * dev_number chosen in Manage must be preserved | |
1044 | */ | |
1045 | if (get_linux_version() >= 2006018) | |
1046 | sb->dev_number = refsb->dev_number; | |
1047 | } | |
1048 | free(refsb); | |
892debc8 | 1049 | } |
34163fc7 | 1050 | |
111d01fc NB |
1051 | if (!get_dev_size(di->fd, NULL, &dsize)) |
1052 | return 1; | |
1053 | dsize >>= 9; | |
82d9eba6 | 1054 | |
111d01fc NB |
1055 | if (dsize < 24) { |
1056 | close(di->fd); | |
1057 | return 2; | |
1058 | } | |
82d9eba6 NB |
1059 | |
1060 | ||
111d01fc NB |
1061 | /* |
1062 | * Calculate the position of the superblock. | |
1063 | * It is always aligned to a 4K boundary and | |
1064 | * depending on minor_version, it can be: | |
1065 | * 0: At least 8K, but less than 12K, from end of device | |
1066 | * 1: At start of device | |
1067 | * 2: 4K from start of device. | |
1068 | * Depending on the array size, we might leave extra space | |
1069 | * for a bitmap. | |
1070 | */ | |
1071 | array_size = __le64_to_cpu(sb->size); | |
1072 | /* work out how much space we left for a bitmap */ | |
1073 | bm_space = choose_bm_space(array_size); | |
1074 | ||
1075 | switch(st->minor_version) { | |
1076 | case 0: | |
1077 | sb_offset = dsize; | |
1078 | sb_offset -= 8*2; | |
1079 | sb_offset &= ~(4*2-1); | |
1080 | sb->super_offset = __cpu_to_le64(sb_offset); | |
1081 | sb->data_offset = __cpu_to_le64(0); | |
519561f7 NB |
1082 | if (sb_offset - bm_space < array_size) |
1083 | bm_space = sb_offset - array_size; | |
111d01fc NB |
1084 | sb->data_size = __cpu_to_le64(sb_offset - bm_space); |
1085 | break; | |
1086 | case 1: | |
1087 | sb->super_offset = __cpu_to_le64(0); | |
1088 | if (4*2 + bm_space + __le64_to_cpu(sb->size) > dsize) | |
1089 | bm_space = dsize - __le64_to_cpu(sb->size) -4*2; | |
1090 | sb->data_offset = __cpu_to_le64(bm_space + 4*2); | |
1091 | sb->data_size = __cpu_to_le64(dsize - bm_space - 4*2); | |
1092 | break; | |
1093 | case 2: | |
1094 | sb_offset = 4*2; | |
1095 | sb->super_offset = __cpu_to_le64(4*2); | |
1096 | if (4*2 + 4*2 + bm_space + __le64_to_cpu(sb->size) | |
1097 | > dsize) | |
1098 | bm_space = dsize - __le64_to_cpu(sb->size) | |
1099 | - 4*2 - 4*2; | |
1100 | sb->data_offset = __cpu_to_le64(4*2 + 4*2 + bm_space); | |
1101 | sb->data_size = __cpu_to_le64(dsize - 4*2 - 4*2 | |
1102 | - bm_space ); | |
1103 | break; | |
1104 | default: | |
1105 | return -EINVAL; | |
1106 | } | |
82d9eba6 NB |
1107 | |
1108 | ||
111d01fc NB |
1109 | sb->sb_csum = calc_sb_1_csum(sb); |
1110 | rv = store_super1(st, di->fd); | |
1111 | if (rv) | |
1112 | fprintf(stderr, | |
1113 | Name ": failed to write superblock to %s\n", | |
1114 | di->devname); | |
34163fc7 | 1115 | |
111d01fc NB |
1116 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) |
1117 | rv = st->ss->write_bitmap(st, di->fd); | |
1118 | close(di->fd); | |
1119 | di->fd = -1; | |
1120 | } | |
82d9eba6 NB |
1121 | return rv; |
1122 | } | |
111d01fc | 1123 | #endif |
82d9eba6 | 1124 | |
64557c33 | 1125 | static int compare_super1(struct supertype *st, struct supertype *tst) |
82d9eba6 NB |
1126 | { |
1127 | /* | |
1128 | * return: | |
1129 | * 0 same, or first was empty, and second was copied | |
1130 | * 1 second had wrong number | |
1131 | * 2 wrong uuid | |
1132 | * 3 wrong other info | |
1133 | */ | |
64557c33 NB |
1134 | struct mdp_superblock_1 *first = st->sb; |
1135 | struct mdp_superblock_1 *second = tst->sb; | |
82d9eba6 NB |
1136 | |
1137 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
1138 | return 1; | |
1139 | if (second->major_version != __cpu_to_le32(1)) | |
1140 | return 1; | |
1141 | ||
1142 | if (!first) { | |
3d2c4fc7 | 1143 | if (posix_memalign((void**)&first, 512, |
6416d527 | 1144 | 1024 + 512 + |
3d2c4fc7 DW |
1145 | sizeof(struct misc_dev_info)) != 0) { |
1146 | fprintf(stderr, Name | |
1147 | ": %s could not allocate superblock\n", __func__); | |
1148 | return 1; | |
1149 | } | |
6416d527 | 1150 | memcpy(first, second, 1024 + 512 + |
bee8ec56 | 1151 | sizeof(struct misc_dev_info)); |
64557c33 | 1152 | st->sb = first; |
82d9eba6 NB |
1153 | return 0; |
1154 | } | |
1155 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
1156 | return 2; | |
1157 | ||
1158 | if (first->ctime != second->ctime || | |
1159 | first->level != second->level || | |
1160 | first->layout != second->layout || | |
1161 | first->size != second->size || | |
1162 | first->chunksize != second->chunksize || | |
1163 | first->raid_disks != second->raid_disks) | |
1164 | return 3; | |
1165 | return 0; | |
1166 | } | |
1167 | ||
3da92f27 NB |
1168 | static void free_super1(struct supertype *st); |
1169 | ||
1170 | static int load_super1(struct supertype *st, int fd, char *devname) | |
82d9eba6 | 1171 | { |
5dd497ee | 1172 | unsigned long long dsize; |
82d9eba6 NB |
1173 | unsigned long long sb_offset; |
1174 | struct mdp_superblock_1 *super; | |
14263cf1 NB |
1175 | int uuid[4]; |
1176 | struct bitmap_super_s *bsb; | |
bee8ec56 | 1177 | struct misc_dev_info *misc; |
82d9eba6 | 1178 | |
3da92f27 | 1179 | free_super1(st); |
82d9eba6 | 1180 | |
f7e7067b NB |
1181 | if (st->subarray[0]) |
1182 | return 1; | |
1183 | ||
a17a3de3 | 1184 | if (st->ss == NULL || st->minor_version == -1) { |
570c0542 | 1185 | int bestvers = -1; |
23dc1ae8 | 1186 | struct supertype tst; |
570c0542 NB |
1187 | __u64 bestctime = 0; |
1188 | /* guess... choose latest ctime */ | |
ef609477 | 1189 | memset(&tst, 0, sizeof(tst)); |
23dc1ae8 NB |
1190 | tst.ss = &super1; |
1191 | for (tst.minor_version = 0; tst.minor_version <= 2 ; tst.minor_version++) { | |
3da92f27 NB |
1192 | switch(load_super1(&tst, fd, devname)) { |
1193 | case 0: super = tst.sb; | |
570c0542 NB |
1194 | if (bestvers == -1 || |
1195 | bestctime < __le64_to_cpu(super->ctime)) { | |
23dc1ae8 | 1196 | bestvers = tst.minor_version; |
570c0542 NB |
1197 | bestctime = __le64_to_cpu(super->ctime); |
1198 | } | |
1199 | free(super); | |
3da92f27 | 1200 | tst.sb = NULL; |
570c0542 | 1201 | break; |
23dc1ae8 | 1202 | case 1: return 1; /*bad device */ |
82d9eba6 NB |
1203 | case 2: break; /* bad, try next */ |
1204 | } | |
1205 | } | |
570c0542 NB |
1206 | if (bestvers != -1) { |
1207 | int rv; | |
23dc1ae8 NB |
1208 | tst.minor_version = bestvers; |
1209 | tst.ss = &super1; | |
1210 | tst.max_devs = 384; | |
3da92f27 | 1211 | rv = load_super1(&tst, fd, devname); |
23dc1ae8 NB |
1212 | if (rv == 0) |
1213 | *st = tst; | |
570c0542 NB |
1214 | return rv; |
1215 | } | |
82d9eba6 NB |
1216 | return 2; |
1217 | } | |
beae1dfe NB |
1218 | if (!get_dev_size(fd, devname, &dsize)) |
1219 | return 1; | |
1220 | dsize >>= 9; | |
82d9eba6 | 1221 | |
5dd497ee | 1222 | if (dsize < 24) { |
82d9eba6 | 1223 | if (devname) |
5dd497ee NB |
1224 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", |
1225 | devname, dsize); | |
82d9eba6 NB |
1226 | return 1; |
1227 | } | |
1228 | ||
1229 | /* | |
1230 | * Calculate the position of the superblock. | |
1231 | * It is always aligned to a 4K boundary and | |
14263cf1 | 1232 | * depending on minor_version, it can be: |
82d9eba6 NB |
1233 | * 0: At least 8K, but less than 12K, from end of device |
1234 | * 1: At start of device | |
1235 | * 2: 4K from start of device. | |
1236 | */ | |
1237 | switch(st->minor_version) { | |
1238 | case 0: | |
5dd497ee | 1239 | sb_offset = dsize; |
82d9eba6 NB |
1240 | sb_offset -= 8*2; |
1241 | sb_offset &= ~(4*2-1); | |
1242 | break; | |
1243 | case 1: | |
1244 | sb_offset = 0; | |
1245 | break; | |
1246 | case 2: | |
1247 | sb_offset = 4*2; | |
1248 | break; | |
1249 | default: | |
1250 | return -EINVAL; | |
1251 | } | |
1252 | ||
1253 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
1254 | ||
1255 | ||
1256 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
1257 | if (devname) | |
1258 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
1259 | devname, strerror(errno)); | |
1260 | return 1; | |
1261 | } | |
1262 | ||
3d2c4fc7 | 1263 | if (posix_memalign((void**)&super, 512, |
6416d527 | 1264 | 1024 + 512 + |
3d2c4fc7 DW |
1265 | sizeof(struct misc_dev_info)) != 0) { |
1266 | fprintf(stderr, Name ": %s could not allocate superblock\n", | |
1267 | __func__); | |
1268 | return 1; | |
1269 | } | |
82d9eba6 | 1270 | |
5ea022a1 | 1271 | if (aread(fd, super, 1024) != 1024) { |
82d9eba6 NB |
1272 | if (devname) |
1273 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
1274 | devname); | |
1275 | free(super); | |
1276 | return 1; | |
1277 | } | |
1278 | ||
1279 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
1280 | if (devname) | |
1281 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
1282 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
1283 | free(super); | |
1284 | return 2; | |
1285 | } | |
1286 | ||
1287 | if (__le32_to_cpu(super->major_version) != 1) { | |
1288 | if (devname) | |
1289 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
1290 | devname, __le32_to_cpu(super->major_version)); | |
1291 | free(super); | |
1292 | return 2; | |
1293 | } | |
1294 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
1295 | if (devname) | |
1296 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
1297 | devname); | |
1298 | free(super); | |
1299 | return 2; | |
1300 | } | |
64557c33 | 1301 | st->sb = super; |
14263cf1 | 1302 | |
bee8ec56 NB |
1303 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); |
1304 | ||
6416d527 | 1305 | misc = (struct misc_dev_info*) (((char*)super)+1024+512); |
bee8ec56 NB |
1306 | misc->device_size = dsize; |
1307 | ||
14263cf1 NB |
1308 | /* Now check on the bitmap superblock */ |
1309 | if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0) | |
1310 | return 0; | |
1311 | /* Read the bitmap superblock and make sure it looks | |
1312 | * valid. If it doesn't clear the bit. An --assemble --force | |
1313 | * should get that written out. | |
1314 | */ | |
3da92f27 | 1315 | locate_bitmap1(st, fd); |
5ea022a1 | 1316 | if (aread(fd, ((char*)super)+1024, 512) |
6416d527 | 1317 | != 512) |
14263cf1 NB |
1318 | goto no_bitmap; |
1319 | ||
3da92f27 | 1320 | uuid_from_super1(st, uuid); |
14263cf1 NB |
1321 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || |
1322 | memcmp(bsb->uuid, uuid, 16) != 0) | |
1323 | goto no_bitmap; | |
1324 | return 0; | |
1325 | ||
1326 | no_bitmap: | |
1327 | super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1); | |
82d9eba6 NB |
1328 | return 0; |
1329 | } | |
1330 | ||
1331 | ||
1332 | static struct supertype *match_metadata_desc1(char *arg) | |
1333 | { | |
1334 | struct supertype *st = malloc(sizeof(*st)); | |
1335 | if (!st) return st; | |
1336 | ||
ef609477 | 1337 | memset(st, 0, sizeof(*st)); |
82d9eba6 | 1338 | st->ss = &super1; |
ea329559 | 1339 | st->max_devs = 384; |
64557c33 | 1340 | st->sb = NULL; |
9b2a22d3 N |
1341 | /* leading zeros can be safely ignored. --detail generates them. */ |
1342 | while (*arg == '0') | |
1343 | arg++; | |
1344 | if (strcmp(arg, "1.0") == 0 || | |
1345 | strcmp(arg, "1.00") == 0) { | |
82d9eba6 NB |
1346 | st->minor_version = 0; |
1347 | return st; | |
1348 | } | |
9b2a22d3 N |
1349 | if (strcmp(arg, "1.1") == 0 || |
1350 | strcmp(arg, "1.01") == 0) { | |
82d9eba6 NB |
1351 | st->minor_version = 1; |
1352 | return st; | |
1353 | } | |
9b2a22d3 N |
1354 | if (strcmp(arg, "1.2") == 0 || |
1355 | strcmp(arg, "1.02") == 0) { | |
82d9eba6 NB |
1356 | st->minor_version = 2; |
1357 | return st; | |
1358 | } | |
a17a3de3 | 1359 | if (strcmp(arg, "1") == 0 || |
17f25ca6 | 1360 | strcmp(arg, "default") == 0) { |
a17a3de3 DL |
1361 | st->minor_version = -1; |
1362 | return st; | |
1363 | } | |
82d9eba6 NB |
1364 | |
1365 | free(st); | |
1366 | return NULL; | |
1367 | } | |
1368 | ||
34163fc7 NB |
1369 | /* find available size on device with this devsize, using |
1370 | * superblock type st, and reserving 'reserve' sectors for | |
1371 | * a possible bitmap | |
1372 | */ | |
1bf4e2d9 | 1373 | static __u64 avail_size1(struct supertype *st, __u64 devsize) |
82d9eba6 | 1374 | { |
2a528478 | 1375 | struct mdp_superblock_1 *super = st->sb; |
82d9eba6 NB |
1376 | if (devsize < 24) |
1377 | return 0; | |
1378 | ||
2a528478 N |
1379 | if (super == NULL) |
1380 | /* creating: allow suitable space for bitmap */ | |
1381 | devsize -= choose_bm_space(devsize); | |
1382 | #ifndef MDASSEMBLE | |
1383 | else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
1384 | /* hot-add. allow for actual size of bitmap */ | |
1385 | struct bitmap_super_s *bsb; | |
1386 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1387 | devsize -= bitmap_sectors(bsb); | |
1388 | } | |
1389 | #endif | |
21e92547 | 1390 | |
34163fc7 | 1391 | switch(st->minor_version) { |
a17a3de3 DL |
1392 | case -1: /* no specified. Now time to set default */ |
1393 | st->minor_version = 0; | |
1394 | /* FALL THROUGH */ | |
34163fc7 | 1395 | case 0: |
1bf4e2d9 NB |
1396 | /* at end */ |
1397 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
34163fc7 | 1398 | case 1: |
1bf4e2d9 NB |
1399 | /* at start, 4K for superblock and possible bitmap */ |
1400 | return devsize - 4*2; | |
34163fc7 | 1401 | case 2: |
1bf4e2d9 NB |
1402 | /* 4k from start, 4K for superblock and possible bitmap */ |
1403 | return devsize - (4+4)*2; | |
34163fc7 NB |
1404 | } |
1405 | return 0; | |
1406 | } | |
1407 | ||
1bf4e2d9 | 1408 | static int |
3da92f27 | 1409 | add_internal_bitmap1(struct supertype *st, |
199171a2 NB |
1410 | int *chunkp, int delay, int write_behind, |
1411 | unsigned long long size, | |
21e92547 | 1412 | int may_change, int major) |
34163fc7 NB |
1413 | { |
1414 | /* | |
1bf4e2d9 NB |
1415 | * If not may_change, then this is a 'Grow', and the bitmap |
1416 | * must fit after the superblock. | |
1417 | * If may_change, then this is create, and we can put the bitmap | |
1418 | * before the superblock if we like, or may move the start. | |
199171a2 NB |
1419 | * If !may_change, the bitmap MUST live at offset of 1K, until |
1420 | * we get a sysfs interface. | |
34163fc7 | 1421 | * |
f9c25f1d | 1422 | * size is in sectors, chunk is in bytes !!! |
34163fc7 NB |
1423 | */ |
1424 | ||
1bf4e2d9 | 1425 | unsigned long long bits; |
199171a2 | 1426 | unsigned long long max_bits; |
34163fc7 | 1427 | unsigned long long min_chunk; |
199171a2 NB |
1428 | long offset; |
1429 | int chunk = *chunkp; | |
37dfc3d6 | 1430 | int room = 0; |
3da92f27 | 1431 | struct mdp_superblock_1 *sb = st->sb; |
34163fc7 NB |
1432 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); |
1433 | ||
199171a2 NB |
1434 | switch(st->minor_version) { |
1435 | case 0: | |
1436 | /* either 3K after the superblock, or some amount of space | |
1437 | * before. | |
1438 | */ | |
1439 | if (may_change) { | |
1440 | /* We are creating array, so we *know* how much room has | |
1441 | * been left. | |
1442 | */ | |
1443 | offset = 0; | |
2fb749d1 NB |
1444 | room = choose_bm_space(__le64_to_cpu(sb->size)); |
1445 | if (room == 4*2) { | |
1446 | /* make it 3K after the superblock */ | |
199171a2 NB |
1447 | room = 3*2; |
1448 | offset = 2; | |
1449 | } | |
1450 | } else { | |
1451 | room = __le64_to_cpu(sb->super_offset) | |
1452 | - __le64_to_cpu(sb->data_offset) | |
1453 | - __le64_to_cpu(sb->data_size); | |
1454 | /* remove '1 ||' when we can set offset via sysfs */ | |
1455 | if (1 || (room < 3*2 && | |
1456 | __le32_to_cpu(sb->max_dev) <= 384)) { | |
1457 | room = 3*2; | |
1458 | offset = 1*2; | |
1459 | } else { | |
1460 | offset = 0; /* means movable offset */ | |
1461 | } | |
1462 | } | |
1463 | break; | |
1464 | case 1: | |
1465 | case 2: /* between superblock and data */ | |
1466 | if (may_change) { | |
1467 | offset = 4*2; | |
2fb749d1 | 1468 | room = choose_bm_space(__le64_to_cpu(sb->size)); |
199171a2 NB |
1469 | } else { |
1470 | room = __le64_to_cpu(sb->data_offset) | |
1471 | - __le64_to_cpu(sb->super_offset); | |
1472 | if (1 || __le32_to_cpu(sb->max_dev) <= 384) { | |
1473 | room -= 2; | |
1474 | offset = 2; | |
1475 | } else { | |
1476 | room -= 4*2; | |
1477 | offset = 4*2; | |
1478 | } | |
1479 | } | |
1480 | break; | |
ae491d1e NB |
1481 | default: |
1482 | return 0; | |
199171a2 | 1483 | } |
1bf4e2d9 | 1484 | |
199171a2 NB |
1485 | if (chunk == UnSet && room > 128*2) |
1486 | /* Limit to 128K of bitmap when chunk size not requested */ | |
1487 | room = 128*2; | |
1bf4e2d9 | 1488 | |
199171a2 | 1489 | max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8; |
34163fc7 NB |
1490 | |
1491 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
f9c25f1d | 1492 | bits = (size*512)/min_chunk +1; |
34163fc7 NB |
1493 | while (bits > max_bits) { |
1494 | min_chunk *= 2; | |
1495 | bits = (bits+1)/2; | |
1496 | } | |
1497 | if (chunk == UnSet) | |
1498 | chunk = min_chunk; | |
1499 | else if (chunk < min_chunk) | |
1500 | return 0; /* chunk size too small */ | |
21e92547 NB |
1501 | if (chunk == 0) /* rounding problem */ |
1502 | return 0; | |
34163fc7 | 1503 | |
199171a2 NB |
1504 | if (offset == 0) { |
1505 | bits = (size*512) / chunk + 1; | |
1506 | room = ((bits+7)/8 + sizeof(bitmap_super_t) +511)/512; | |
1507 | offset = -room; | |
1508 | } | |
1509 | ||
1510 | sb->bitmap_offset = __cpu_to_le32(offset); | |
34163fc7 NB |
1511 | |
1512 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
29e766a5 | 1513 | memset(bms, 0, sizeof(*bms)); |
34163fc7 | 1514 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
dcec9ee5 | 1515 | bms->version = __cpu_to_le32(major); |
3da92f27 | 1516 | uuid_from_super1(st, (int*)bms->uuid); |
34163fc7 NB |
1517 | bms->chunksize = __cpu_to_le32(chunk); |
1518 | bms->daemon_sleep = __cpu_to_le32(delay); | |
f9c25f1d | 1519 | bms->sync_size = __cpu_to_le64(size); |
34163fc7 NB |
1520 | bms->write_behind = __cpu_to_le32(write_behind); |
1521 | ||
199171a2 | 1522 | *chunkp = chunk; |
34163fc7 NB |
1523 | return 1; |
1524 | } | |
1525 | ||
1526 | ||
3da92f27 | 1527 | static void locate_bitmap1(struct supertype *st, int fd) |
34163fc7 | 1528 | { |
34163fc7 | 1529 | unsigned long long offset; |
1e0d770c NB |
1530 | struct mdp_superblock_1 *sb; |
1531 | int mustfree = 0; | |
34163fc7 | 1532 | |
3da92f27 NB |
1533 | if (!st->sb) { |
1534 | if (st->ss->load_super(st, fd, NULL)) | |
f6d75de8 | 1535 | return; /* no error I hope... */ |
1e0d770c NB |
1536 | mustfree = 1; |
1537 | } | |
3da92f27 | 1538 | sb = st->sb; |
e478dc86 | 1539 | |
1bf4e2d9 | 1540 | offset = __le64_to_cpu(sb->super_offset); |
68754bd1 | 1541 | offset += (int32_t) __le32_to_cpu(sb->bitmap_offset); |
1e0d770c | 1542 | if (mustfree) |
f6d75de8 | 1543 | free(sb); |
1bf4e2d9 | 1544 | lseek64(fd, offset<<9, 0); |
34163fc7 NB |
1545 | } |
1546 | ||
3da92f27 | 1547 | static int write_bitmap1(struct supertype *st, int fd) |
34163fc7 | 1548 | { |
3da92f27 | 1549 | struct mdp_superblock_1 *sb = st->sb; |
1bf4e2d9 | 1550 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); |
34163fc7 NB |
1551 | int rv = 0; |
1552 | ||
1553 | int towrite, n; | |
5ea022a1 | 1554 | char *buf = (char*)(((long)(abuf+4096))&~4095UL); |
34163fc7 | 1555 | |
3da92f27 | 1556 | locate_bitmap1(st, fd); |
34163fc7 | 1557 | |
6416d527 NB |
1558 | memset(buf, 0xff, 4096); |
1559 | memcpy(buf, ((char*)sb)+1024, sizeof(bitmap_super_t)); | |
1560 | ||
1bf4e2d9 NB |
1561 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); |
1562 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
6416d527 NB |
1563 | towrite += sizeof(bitmap_super_t); |
1564 | towrite = ROUND_UP(towrite, 512); | |
34163fc7 NB |
1565 | while (towrite > 0) { |
1566 | n = towrite; | |
6416d527 NB |
1567 | if (n > 4096) |
1568 | n = 4096; | |
34163fc7 NB |
1569 | n = write(fd, buf, n); |
1570 | if (n > 0) | |
1571 | towrite -= n; | |
1572 | else | |
1573 | break; | |
6416d527 | 1574 | memset(buf, 0xff, 4096); |
34163fc7 NB |
1575 | } |
1576 | fsync(fd); | |
1577 | if (towrite) | |
1578 | rv = -2; | |
1579 | ||
1580 | return rv; | |
82d9eba6 NB |
1581 | } |
1582 | ||
3da92f27 | 1583 | static void free_super1(struct supertype *st) |
df37ffc0 | 1584 | { |
3da92f27 NB |
1585 | if (st->sb) |
1586 | free(st->sb); | |
1587 | st->sb = NULL; | |
df37ffc0 NB |
1588 | } |
1589 | ||
0e600426 | 1590 | #ifndef MDASSEMBLE |
17f25ca6 NB |
1591 | static int validate_geometry1(struct supertype *st, int level, |
1592 | int layout, int raiddisks, | |
1593 | int chunk, unsigned long long size, | |
2c514b71 NB |
1594 | char *subdev, unsigned long long *freesize, |
1595 | int verbose) | |
17f25ca6 NB |
1596 | { |
1597 | unsigned long long ldsize; | |
1598 | int fd; | |
1599 | ||
1600 | if (level == LEVEL_CONTAINER) | |
1601 | return 0; | |
1602 | if (!subdev) | |
1603 | return 1; | |
1604 | ||
1605 | fd = open(subdev, O_RDONLY|O_EXCL, 0); | |
1606 | if (fd < 0) { | |
2c514b71 NB |
1607 | if (verbose) |
1608 | fprintf(stderr, Name ": super1.x cannot open %s: %s\n", | |
1609 | subdev, strerror(errno)); | |
17f25ca6 NB |
1610 | return 0; |
1611 | } | |
2c514b71 | 1612 | |
17f25ca6 NB |
1613 | if (!get_dev_size(fd, subdev, &ldsize)) { |
1614 | close(fd); | |
1615 | return 0; | |
1616 | } | |
1617 | close(fd); | |
1618 | ||
1619 | *freesize = avail_size1(st, ldsize >> 9); | |
1620 | return 1; | |
1621 | } | |
0e600426 | 1622 | #endif /* MDASSEMBLE */ |
17f25ca6 | 1623 | |
82d9eba6 | 1624 | struct superswitch super1 = { |
c7654afc | 1625 | #ifndef MDASSEMBLE |
82d9eba6 NB |
1626 | .examine_super = examine_super1, |
1627 | .brief_examine_super = brief_examine_super1, | |
0d726f17 | 1628 | .export_examine_super = export_examine_super1, |
82d9eba6 NB |
1629 | .detail_super = detail_super1, |
1630 | .brief_detail_super = brief_detail_super1, | |
0d726f17 | 1631 | .export_detail_super = export_detail_super1, |
111d01fc | 1632 | .write_init_super = write_init_super1, |
0e600426 N |
1633 | .validate_geometry = validate_geometry1, |
1634 | .add_to_super = add_to_super1, | |
c7654afc | 1635 | #endif |
83b6208e | 1636 | .match_home = match_home1, |
82d9eba6 NB |
1637 | .uuid_from_super = uuid_from_super1, |
1638 | .getinfo_super = getinfo_super1, | |
1639 | .update_super = update_super1, | |
82d9eba6 | 1640 | .init_super = init_super1, |
82d9eba6 | 1641 | .store_super = store_super1, |
82d9eba6 NB |
1642 | .compare_super = compare_super1, |
1643 | .load_super = load_super1, | |
1644 | .match_metadata_desc = match_metadata_desc1, | |
1645 | .avail_size = avail_size1, | |
34163fc7 NB |
1646 | .add_internal_bitmap = add_internal_bitmap1, |
1647 | .locate_bitmap = locate_bitmap1, | |
1648 | .write_bitmap = write_bitmap1, | |
df37ffc0 | 1649 | .free_super = free_super1, |
f277ce36 NB |
1650 | #if __BYTE_ORDER == BIG_ENDIAN |
1651 | .swapuuid = 0, | |
1652 | #else | |
1653 | .swapuuid = 1, | |
1654 | #endif | |
4cce4069 | 1655 | .name = "1.0", |
82d9eba6 | 1656 | }; |