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