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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de> | |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@suse.de> | |
23 | */ | |
24 | ||
25 | #include "mdadm.h" | |
26 | /* | |
27 | * The version-1 superblock : | |
28 | * All numeric fields are little-endian. | |
29 | * | |
30 | * total size: 256 bytes plus 2 per device. | |
31 | * 1K allows 384 devices. | |
32 | */ | |
33 | struct mdp_superblock_1 { | |
34 | /* constant array information - 128 bytes */ | |
35 | __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */ | |
36 | __u32 major_version; /* 1 */ | |
37 | __u32 feature_map; /* 0 for now */ | |
38 | __u32 pad0; /* always set to 0 when writing */ | |
39 | ||
40 | __u8 set_uuid[16]; /* user-space generated. */ | |
41 | char set_name[32]; /* set and interpreted by user-space */ | |
42 | ||
43 | __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/ | |
44 | __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */ | |
45 | __u32 layout; /* only for raid5 currently */ | |
46 | __u64 size; /* used size of component devices, in 512byte sectors */ | |
47 | ||
48 | __u32 chunksize; /* in 512byte sectors */ | |
49 | __u32 raid_disks; | |
50 | __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts | |
51 | * NOTE: signed, so bitmap can be before superblock | |
52 | * only meaningful of feature_map[0] is set. | |
53 | */ | |
54 | ||
55 | /* These are only valid with feature bit '4' */ | |
56 | __u32 new_level; /* new level we are reshaping to */ | |
57 | __u64 reshape_position; /* next address in array-space for reshape */ | |
58 | __u32 delta_disks; /* change in number of raid_disks */ | |
59 | __u32 new_layout; /* new layout */ | |
60 | __u32 new_chunk; /* new chunk size (bytes) */ | |
61 | __u8 pad1[128-124]; /* set to 0 when written */ | |
62 | ||
63 | /* constant this-device information - 64 bytes */ | |
64 | __u64 data_offset; /* sector start of data, often 0 */ | |
65 | __u64 data_size; /* sectors in this device that can be used for data */ | |
66 | __u64 super_offset; /* sector start of this superblock */ | |
67 | __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */ | |
68 | __u32 dev_number; /* permanent identifier of this device - not role in raid */ | |
69 | __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */ | |
70 | __u8 device_uuid[16]; /* user-space setable, ignored by kernel */ | |
71 | __u8 devflags; /* per-device flags. Only one defined...*/ | |
72 | #define WriteMostly1 1 /* mask for writemostly flag in above */ | |
73 | __u8 pad2[64-57]; /* set to 0 when writing */ | |
74 | ||
75 | /* array state information - 64 bytes */ | |
76 | __u64 utime; /* 40 bits second, 24 btes microseconds */ | |
77 | __u64 events; /* incremented when superblock updated */ | |
78 | __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */ | |
79 | __u32 sb_csum; /* checksum upto dev_roles[max_dev] */ | |
80 | __u32 max_dev; /* size of dev_roles[] array to consider */ | |
81 | __u8 pad3[64-32]; /* set to 0 when writing */ | |
82 | ||
83 | /* device state information. Indexed by dev_number. | |
84 | * 2 bytes per device | |
85 | * Note there are no per-device state flags. State information is rolled | |
86 | * into the 'roles' value. If a device is spare or faulty, then it doesn't | |
87 | * have a meaningful role. | |
88 | */ | |
89 | __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ | |
90 | }; | |
91 | ||
92 | struct misc_dev_info { | |
93 | __u64 device_size; | |
94 | }; | |
95 | ||
96 | /* feature_map bits */ | |
97 | #define MD_FEATURE_BITMAP_OFFSET 1 | |
98 | #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and | |
99 | * must be honoured | |
100 | */ | |
101 | #define MD_FEATURE_RESHAPE_ACTIVE 4 | |
102 | ||
103 | #define MD_FEATURE_ALL (1|2|4) | |
104 | ||
105 | #ifndef offsetof | |
106 | #define offsetof(t,f) ((size_t)&(((t*)0)->f)) | |
107 | #endif | |
108 | static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb) | |
109 | { | |
110 | unsigned int disk_csum, csum; | |
111 | unsigned long long newcsum; | |
112 | int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2; | |
113 | unsigned int *isuper = (unsigned int*)sb; | |
114 | ||
115 | /* make sure I can count... */ | |
116 | if (offsetof(struct mdp_superblock_1,data_offset) != 128 || | |
117 | offsetof(struct mdp_superblock_1, utime) != 192 || | |
118 | sizeof(struct mdp_superblock_1) != 256) { | |
119 | fprintf(stderr, "WARNING - superblock isn't sized correctly\n"); | |
120 | } | |
121 | ||
122 | disk_csum = sb->sb_csum; | |
123 | sb->sb_csum = 0; | |
124 | newcsum = 0; | |
125 | for (; size>=4; size -= 4 ) { | |
126 | newcsum += __le32_to_cpu(*isuper); | |
127 | isuper++; | |
128 | } | |
129 | ||
130 | if (size == 2) | |
131 | newcsum += __le16_to_cpu(*(unsigned short*) isuper); | |
132 | ||
133 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
134 | sb->sb_csum = disk_csum; | |
135 | return __cpu_to_le32(csum); | |
136 | } | |
137 | ||
138 | static char abuf[4096+4096]; | |
139 | static int aread(int fd, void *buf, int len) | |
140 | { | |
141 | /* aligned read. | |
142 | * On devices with a 4K sector size, we need to read | |
143 | * the full sector and copy relevant bits into | |
144 | * the buffer | |
145 | */ | |
146 | int bsize; | |
147 | char *b; | |
148 | int n; | |
149 | if (ioctl(fd, BLKSSZGET, &bsize) != 0 || | |
150 | bsize <= len) | |
151 | return read(fd, buf, len); | |
152 | if (bsize > 4096) | |
153 | return -1; | |
154 | b = (char*)(((long)(abuf+4096))&~4095UL); | |
155 | ||
156 | n = read(fd, b, bsize); | |
157 | if (n <= 0) | |
158 | return n; | |
159 | lseek(fd, len - n, 1); | |
160 | if (n > len) | |
161 | n = len; | |
162 | memcpy(buf, b, n); | |
163 | return n; | |
164 | } | |
165 | ||
166 | static int awrite(int fd, void *buf, int len) | |
167 | { | |
168 | /* aligned write. | |
169 | * On devices with a 4K sector size, we need to write | |
170 | * the full sector. We pre-read if the sector is larger | |
171 | * than the write. | |
172 | * The address must be sector-aligned. | |
173 | */ | |
174 | int bsize; | |
175 | char *b; | |
176 | int n; | |
177 | if (ioctl(fd, BLKSSZGET, &bsize) != 0 || | |
178 | bsize <= len) | |
179 | return write(fd, buf, len); | |
180 | if (bsize > 4096) | |
181 | return -1; | |
182 | b = (char*)(((long)(abuf+4096))&~4095UL); | |
183 | ||
184 | n = read(fd, b, bsize); | |
185 | if (n <= 0) | |
186 | return n; | |
187 | lseek(fd, -n, 1); | |
188 | memcpy(b, buf, len); | |
189 | n = write(fd, b, bsize); | |
190 | if (n <= 0) | |
191 | return n; | |
192 | lseek(fd, len - n, 1); | |
193 | return len; | |
194 | } | |
195 | ||
196 | #ifndef MDASSEMBLE | |
197 | static void examine_super1(struct supertype *st, char *homehost) | |
198 | { | |
199 | struct mdp_superblock_1 *sb = st->sb; | |
200 | time_t atime; | |
201 | unsigned int d; | |
202 | int role; | |
203 | int delta_extra = 0; | |
204 | int i; | |
205 | char *c; | |
206 | int l = homehost ? strlen(homehost) : 0; | |
207 | int layout; | |
208 | unsigned long long sb_offset; | |
209 | ||
210 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
211 | printf(" Version : 1"); | |
212 | sb_offset = __le64_to_cpu(sb->super_offset); | |
213 | if (sb_offset <= 4) | |
214 | printf(".1\n"); | |
215 | else if (sb_offset <= 8) | |
216 | printf(".2\n"); | |
217 | else | |
218 | printf(".0\n"); | |
219 | printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); | |
220 | printf(" Array UUID : "); | |
221 | for (i=0; i<16; i++) { | |
222 | if ((i&3)==0 && i != 0) printf(":"); | |
223 | printf("%02x", sb->set_uuid[i]); | |
224 | } | |
225 | printf("\n"); | |
226 | printf(" Name : %.32s", sb->set_name); | |
227 | if (l > 0 && l < 32 && | |
228 | sb->set_name[l] == ':' && | |
229 | strncmp(sb->set_name, homehost, l) == 0) | |
230 | printf(" (local to host %s)", homehost); | |
231 | printf("\n"); | |
232 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
233 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
234 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
235 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
236 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
237 | printf("\n"); | |
238 | printf(" Avail Dev Size : %llu%s\n", | |
239 | (unsigned long long)__le64_to_cpu(sb->data_size), | |
240 | human_size(__le64_to_cpu(sb->data_size)<<9)); | |
241 | if (__le32_to_cpu(sb->level) > 0) { | |
242 | int ddsks=0; | |
243 | switch(__le32_to_cpu(sb->level)) { | |
244 | case 1: ddsks=1;break; | |
245 | case 4: | |
246 | case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break; | |
247 | case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break; | |
248 | case 10: | |
249 | layout = __le32_to_cpu(sb->layout); | |
250 | ddsks = __le32_to_cpu(sb->raid_disks) | |
251 | / (layout&255) / ((layout>>8)&255); | |
252 | } | |
253 | if (ddsks) | |
254 | printf(" Array Size : %llu%s\n", | |
255 | ddsks*(unsigned long long)__le64_to_cpu(sb->size), | |
256 | human_size(ddsks*__le64_to_cpu(sb->size)<<9)); | |
257 | if (sb->size != sb->data_size) | |
258 | printf(" Used Dev Size : %llu%s\n", | |
259 | (unsigned long long)__le64_to_cpu(sb->size), | |
260 | human_size(__le64_to_cpu(sb->size)<<9)); | |
261 | } | |
262 | if (sb->data_offset) | |
263 | printf(" Data Offset : %llu sectors\n", | |
264 | (unsigned long long)__le64_to_cpu(sb->data_offset)); | |
265 | printf(" Super Offset : %llu sectors\n", | |
266 | (unsigned long long)__le64_to_cpu(sb->super_offset)); | |
267 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) | |
268 | printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset)); | |
269 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); | |
270 | printf(" Device UUID : "); | |
271 | for (i=0; i<16; i++) { | |
272 | if ((i&3)==0 && i != 0) printf(":"); | |
273 | printf("%02x", sb->device_uuid[i]); | |
274 | } | |
275 | printf("\n"); | |
276 | printf("\n"); | |
277 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
278 | printf("Internal Bitmap : %ld sectors from superblock\n", | |
279 | (long)(int32_t)__le32_to_cpu(sb->bitmap_offset)); | |
280 | } | |
281 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
282 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2, | |
283 | human_size(__le64_to_cpu(sb->reshape_position)<<9)); | |
284 | if (__le32_to_cpu(sb->delta_disks)) { | |
285 | printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks)); | |
286 | printf(" (%d->%d)\n", | |
287 | __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks), | |
288 | __le32_to_cpu(sb->raid_disks)); | |
289 | if ((int)__le32_to_cpu(sb->delta_disks) < 0) | |
290 | delta_extra = -__le32_to_cpu(sb->delta_disks); | |
291 | } | |
292 | if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { | |
293 | c = map_num(pers, __le32_to_cpu(sb->new_level)); | |
294 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
295 | } | |
296 | if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) { | |
297 | if (__le32_to_cpu(sb->level) == 5) { | |
298 | c = map_num(r5layout, __le32_to_cpu(sb->new_layout)); | |
299 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
300 | } | |
301 | if (__le32_to_cpu(sb->level) == 6) { | |
302 | c = map_num(r6layout, __le32_to_cpu(sb->new_layout)); | |
303 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
304 | } | |
305 | if (__le32_to_cpu(sb->level) == 10) { | |
306 | printf(" New Layout :"); | |
307 | print_r10_layout(__le32_to_cpu(sb->new_layout)); | |
308 | printf("\n"); | |
309 | } | |
310 | } | |
311 | if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) | |
312 | printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); | |
313 | printf("\n"); | |
314 | } | |
315 | if (sb->devflags) { | |
316 | printf(" Flags :"); | |
317 | if (sb->devflags & WriteMostly1) | |
318 | printf(" write-mostly"); | |
319 | printf("\n"); | |
320 | } | |
321 | ||
322 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
323 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
324 | ||
325 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
326 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
327 | else | |
328 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
329 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
330 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
331 | printf("\n"); | |
332 | if (__le32_to_cpu(sb->level) == 5) { | |
333 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
334 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
335 | } | |
336 | if (__le32_to_cpu(sb->level) == 6) { | |
337 | c = map_num(r6layout, __le32_to_cpu(sb->layout)); | |
338 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
339 | } | |
340 | if (__le32_to_cpu(sb->level) == 10) { | |
341 | int lo = __le32_to_cpu(sb->layout); | |
342 | printf(" Layout :"); | |
343 | print_r10_layout(lo); | |
344 | printf("\n"); | |
345 | } | |
346 | switch(__le32_to_cpu(sb->level)) { | |
347 | case 0: | |
348 | case 4: | |
349 | case 5: | |
350 | case 6: | |
351 | case 10: | |
352 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
353 | break; | |
354 | case -1: | |
355 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
356 | break; | |
357 | default: break; | |
358 | } | |
359 | printf("\n"); | |
360 | #if 0 | |
361 | /* This turns out to just be confusing */ | |
362 | printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number)); | |
363 | for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--) | |
364 | if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff) | |
365 | break; | |
366 | for (d=0; d < i; d++) { | |
367 | int role = __le16_to_cpu(sb->dev_roles[d]); | |
368 | if (d) printf(", "); | |
369 | if (role == 0xffff) printf("empty"); | |
370 | else if(role == 0xfffe) printf("failed"); | |
371 | else printf("%d", role); | |
372 | } | |
373 | printf(")\n"); | |
374 | #endif | |
375 | printf(" Device Role : "); | |
376 | d = __le32_to_cpu(sb->dev_number); | |
377 | if (d < __le32_to_cpu(sb->max_dev)) | |
378 | role = __le16_to_cpu(sb->dev_roles[d]); | |
379 | else | |
380 | role = 0xFFFF; | |
381 | if (role >= 0xFFFE) | |
382 | printf("spare\n"); | |
383 | else | |
384 | printf("Active device %d\n", role); | |
385 | ||
386 | printf(" Array State : "); | |
387 | for (d=0; d<__le32_to_cpu(sb->raid_disks) + delta_extra; d++) { | |
388 | int cnt = 0; | |
389 | unsigned int i; | |
390 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
391 | unsigned int role = __le16_to_cpu(sb->dev_roles[i]); | |
392 | if (role == d) | |
393 | cnt++; | |
394 | } | |
395 | if (cnt > 1) printf("?"); | |
396 | else if (cnt == 1) printf("A"); | |
397 | else printf ("."); | |
398 | } | |
399 | #if 0 | |
400 | /* This is confusing too */ | |
401 | faulty = 0; | |
402 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
403 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
404 | if (role == 0xFFFE) | |
405 | faulty++; | |
406 | } | |
407 | if (faulty) printf(" %d failed", faulty); | |
408 | #endif | |
409 | printf(" ('A' == active, '.' == missing)"); | |
410 | printf("\n"); | |
411 | } | |
412 | ||
413 | ||
414 | static void brief_examine_super1(struct supertype *st, int verbose) | |
415 | { | |
416 | struct mdp_superblock_1 *sb = st->sb; | |
417 | int i; | |
418 | unsigned long long sb_offset; | |
419 | char *nm; | |
420 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
421 | ||
422 | nm = strchr(sb->set_name, ':'); | |
423 | if (nm) | |
424 | nm++; | |
425 | else if (sb->set_name[0]) | |
426 | nm = sb->set_name; | |
427 | else | |
428 | nm = NULL; | |
429 | ||
430 | printf("ARRAY%s%s", nm ? " /dev/md/":"", nm); | |
431 | if (verbose && c) | |
432 | printf(" level=%s", c); | |
433 | sb_offset = __le64_to_cpu(sb->super_offset); | |
434 | if (sb_offset <= 4) | |
435 | printf(" metadata=1.1 "); | |
436 | else if (sb_offset <= 8) | |
437 | printf(" metadata=1.2 "); | |
438 | else | |
439 | printf(" metadata=1.0 "); | |
440 | if (verbose) | |
441 | printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks)); | |
442 | printf("UUID="); | |
443 | for (i=0; i<16; i++) { | |
444 | if ((i&3)==0 && i != 0) printf(":"); | |
445 | printf("%02x", sb->set_uuid[i]); | |
446 | } | |
447 | if (sb->set_name[0]) | |
448 | printf(" name=%.32s", sb->set_name); | |
449 | printf("\n"); | |
450 | } | |
451 | ||
452 | static void export_examine_super1(struct supertype *st) | |
453 | { | |
454 | struct mdp_superblock_1 *sb = st->sb; | |
455 | int i; | |
456 | int len = 32; | |
457 | ||
458 | printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level))); | |
459 | printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks)); | |
460 | for (i=0; i<32; i++) | |
461 | if (sb->set_name[i] == '\n' || | |
462 | sb->set_name[i] == '\0') { | |
463 | len = i; | |
464 | break; | |
465 | } | |
466 | if (len) | |
467 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
468 | printf("MD_UUID="); | |
469 | for (i=0; i<16; i++) { | |
470 | if ((i&3)==0 && i != 0) printf(":"); | |
471 | printf("%02x", sb->set_uuid[i]); | |
472 | } | |
473 | printf("\n"); | |
474 | printf("MD_UPDATE_TIME=%llu\n", | |
475 | __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL); | |
476 | printf("MD_DEV_UUID="); | |
477 | for (i=0; i<16; i++) { | |
478 | if ((i&3)==0 && i != 0) printf(":"); | |
479 | printf("%02x", sb->device_uuid[i]); | |
480 | } | |
481 | printf("\n"); | |
482 | printf("MD_EVENTS=%llu\n", | |
483 | (unsigned long long)__le64_to_cpu(sb->events)); | |
484 | } | |
485 | ||
486 | static void detail_super1(struct supertype *st, char *homehost) | |
487 | { | |
488 | struct mdp_superblock_1 *sb = st->sb; | |
489 | int i; | |
490 | int l = homehost ? strlen(homehost) : 0; | |
491 | ||
492 | printf(" Name : %.32s", sb->set_name); | |
493 | if (l > 0 && l < 32 && | |
494 | sb->set_name[l] == ':' && | |
495 | strncmp(sb->set_name, homehost, l) == 0) | |
496 | printf(" (local to host %s)", homehost); | |
497 | printf("\n UUID : "); | |
498 | for (i=0; i<16; i++) { | |
499 | if ((i&3)==0 && i != 0) printf(":"); | |
500 | printf("%02x", sb->set_uuid[i]); | |
501 | } | |
502 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
503 | } | |
504 | ||
505 | static void brief_detail_super1(struct supertype *st) | |
506 | { | |
507 | struct mdp_superblock_1 *sb = st->sb; | |
508 | int i; | |
509 | ||
510 | if (sb->set_name[0]) | |
511 | printf(" name=%.32s", sb->set_name); | |
512 | printf(" UUID="); | |
513 | for (i=0; i<16; i++) { | |
514 | if ((i&3)==0 && i != 0) printf(":"); | |
515 | printf("%02x", sb->set_uuid[i]); | |
516 | } | |
517 | } | |
518 | ||
519 | static void export_detail_super1(struct supertype *st) | |
520 | { | |
521 | struct mdp_superblock_1 *sb = st->sb; | |
522 | int i; | |
523 | int len = 32; | |
524 | ||
525 | for (i=0; i<32; i++) | |
526 | if (sb->set_name[i] == '\n' || | |
527 | sb->set_name[i] == '\0') { | |
528 | len = i; | |
529 | break; | |
530 | } | |
531 | if (len) | |
532 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
533 | } | |
534 | ||
535 | #endif | |
536 | ||
537 | static int match_home1(struct supertype *st, char *homehost) | |
538 | { | |
539 | struct mdp_superblock_1 *sb = st->sb; | |
540 | int l = homehost ? strlen(homehost) : 0; | |
541 | ||
542 | return (l > 0 && l < 32 && | |
543 | sb->set_name[l] == ':' && | |
544 | strncmp(sb->set_name, homehost, l) == 0); | |
545 | } | |
546 | ||
547 | static void uuid_from_super1(struct supertype *st, int uuid[4]) | |
548 | { | |
549 | struct mdp_superblock_1 *super = st->sb; | |
550 | char *cuuid = (char*)uuid; | |
551 | int i; | |
552 | for (i=0; i<16; i++) | |
553 | cuuid[i] = super->set_uuid[i]; | |
554 | } | |
555 | ||
556 | static void getinfo_super1(struct supertype *st, struct mdinfo *info, char *map) | |
557 | { | |
558 | struct mdp_superblock_1 *sb = st->sb; | |
559 | int working = 0; | |
560 | unsigned int i; | |
561 | unsigned int role; | |
562 | unsigned int map_disks = info->array.raid_disks; | |
563 | ||
564 | memset(info, 0, sizeof(*info)); | |
565 | info->array.major_version = 1; | |
566 | info->array.minor_version = st->minor_version; | |
567 | info->array.patch_version = 0; | |
568 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
569 | info->array.level = __le32_to_cpu(sb->level); | |
570 | info->array.layout = __le32_to_cpu(sb->layout); | |
571 | info->array.md_minor = -1; | |
572 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
573 | info->array.utime = __le64_to_cpu(sb->utime); | |
574 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; | |
575 | info->array.state = | |
576 | (__le64_to_cpu(sb->resync_offset) >= __le64_to_cpu(sb->size)) | |
577 | ? 1 : 0; | |
578 | ||
579 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
580 | info->component_size = __le64_to_cpu(sb->size); | |
581 | ||
582 | info->disk.major = 0; | |
583 | info->disk.minor = 0; | |
584 | info->disk.number = __le32_to_cpu(sb->dev_number); | |
585 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || | |
586 | __le32_to_cpu(sb->max_dev) > 512) | |
587 | role = 0xfffe; | |
588 | else | |
589 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
590 | ||
591 | info->disk.raid_disk = -1; | |
592 | switch(role) { | |
593 | case 0xFFFF: | |
594 | info->disk.state = 0; /* spare: not active, not sync, not faulty */ | |
595 | break; | |
596 | case 0xFFFE: | |
597 | info->disk.state = 1; /* faulty */ | |
598 | break; | |
599 | default: | |
600 | info->disk.state = 6; /* active and in sync */ | |
601 | info->disk.raid_disk = role; | |
602 | } | |
603 | if (sb->devflags & WriteMostly1) | |
604 | info->disk.state |= (1 << MD_DISK_WRITEMOSTLY); | |
605 | info->events = __le64_to_cpu(sb->events); | |
606 | sprintf(info->text_version, "1.%d", st->minor_version); | |
607 | info->safe_mode_delay = 200; | |
608 | ||
609 | memcpy(info->uuid, sb->set_uuid, 16); | |
610 | ||
611 | strncpy(info->name, sb->set_name, 32); | |
612 | info->name[32] = 0; | |
613 | ||
614 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET)) | |
615 | info->recovery_start = __le32_to_cpu(sb->recovery_offset); | |
616 | else | |
617 | info->recovery_start = MaxSector; | |
618 | ||
619 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
620 | info->reshape_active = 1; | |
621 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
622 | info->new_level = __le32_to_cpu(sb->new_level); | |
623 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
624 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
625 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; | |
626 | if (info->delta_disks < 0) | |
627 | info->array.raid_disks -= info->delta_disks; | |
628 | } else | |
629 | info->reshape_active = 0; | |
630 | ||
631 | info->recovery_blocked = info->reshape_active; | |
632 | ||
633 | if (map) | |
634 | for (i=0; i<map_disks; i++) | |
635 | map[i] = 0; | |
636 | for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) { | |
637 | role = __le16_to_cpu(sb->dev_roles[i]); | |
638 | if (/*role == 0xFFFF || */role < (unsigned) info->array.raid_disks) { | |
639 | working++; | |
640 | if (map && role < map_disks) | |
641 | map[role] = 1; | |
642 | } | |
643 | } | |
644 | ||
645 | info->array.working_disks = working; | |
646 | } | |
647 | ||
648 | static struct mdinfo *container_content1(struct supertype *st, char *subarray) | |
649 | { | |
650 | struct mdinfo *info; | |
651 | ||
652 | if (subarray) | |
653 | return NULL; | |
654 | ||
655 | info = malloc(sizeof(*info)); | |
656 | getinfo_super1(st, info, NULL); | |
657 | return info; | |
658 | } | |
659 | ||
660 | static int update_super1(struct supertype *st, struct mdinfo *info, | |
661 | char *update, | |
662 | char *devname, int verbose, | |
663 | int uuid_set, char *homehost) | |
664 | { | |
665 | /* NOTE: for 'assemble' and 'force' we need to return non-zero | |
666 | * if any change was made. For others, the return value is | |
667 | * ignored. | |
668 | */ | |
669 | int rv = 0; | |
670 | struct mdp_superblock_1 *sb = st->sb; | |
671 | ||
672 | if (strcmp(update, "force-one")==0) { | |
673 | /* Not enough devices for a working array, | |
674 | * so bring this one up-to-date | |
675 | */ | |
676 | if (sb->events != __cpu_to_le64(info->events)) | |
677 | rv = 1; | |
678 | sb->events = __cpu_to_le64(info->events); | |
679 | } else if (strcmp(update, "force-array")==0) { | |
680 | /* Degraded array and 'force' requests to | |
681 | * maybe need to mark it 'clean'. | |
682 | */ | |
683 | switch(__le32_to_cpu(sb->level)) { | |
684 | case 5: case 4: case 6: | |
685 | /* need to force clean */ | |
686 | if (sb->resync_offset != MaxSector) | |
687 | rv = 1; | |
688 | sb->resync_offset = MaxSector; | |
689 | } | |
690 | } else if (strcmp(update, "assemble")==0) { | |
691 | int d = info->disk.number; | |
692 | int want; | |
693 | if (info->disk.state == 6) | |
694 | want = info->disk.raid_disk; | |
695 | else | |
696 | want = 0xFFFF; | |
697 | if (sb->dev_roles[d] != __cpu_to_le16(want)) { | |
698 | sb->dev_roles[d] = __cpu_to_le16(want); | |
699 | rv = 1; | |
700 | } | |
701 | if (info->reshape_active && | |
702 | sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) && | |
703 | info->delta_disks >= 0 && | |
704 | info->reshape_progress < __le64_to_cpu(sb->reshape_position)) { | |
705 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
706 | rv = 1; | |
707 | } | |
708 | if (info->reshape_active && | |
709 | sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) && | |
710 | info->delta_disks < 0 && | |
711 | info->reshape_progress > __le64_to_cpu(sb->reshape_position)) { | |
712 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
713 | rv = 1; | |
714 | } | |
715 | } else if (strcmp(update, "linear-grow-new") == 0) { | |
716 | unsigned int i; | |
717 | int rfd, fd; | |
718 | unsigned int max = __le32_to_cpu(sb->max_dev); | |
719 | ||
720 | for (i=0 ; i < max ; i++) | |
721 | if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe) | |
722 | break; | |
723 | sb->dev_number = __cpu_to_le32(i); | |
724 | info->disk.number = i; | |
725 | if (max >= __le32_to_cpu(sb->max_dev)) | |
726 | sb->max_dev = __cpu_to_le32(max+1); | |
727 | ||
728 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
729 | read(rfd, sb->device_uuid, 16) != 16) { | |
730 | __u32 r[4] = {random(), random(), random(), random()}; | |
731 | memcpy(sb->device_uuid, r, 16); | |
732 | } | |
733 | if (rfd >= 0) | |
734 | close(rfd); | |
735 | ||
736 | sb->dev_roles[i] = | |
737 | __cpu_to_le16(info->disk.raid_disk); | |
738 | ||
739 | fd = open(devname, O_RDONLY); | |
740 | if (fd >= 0) { | |
741 | unsigned long long ds; | |
742 | get_dev_size(fd, devname, &ds); | |
743 | close(fd); | |
744 | ds >>= 9; | |
745 | if (__le64_to_cpu(sb->super_offset) < | |
746 | __le64_to_cpu(sb->data_offset)) { | |
747 | sb->data_size = __cpu_to_le64( | |
748 | ds - __le64_to_cpu(sb->data_offset)); | |
749 | } else { | |
750 | ds -= 8*2; | |
751 | ds &= ~(unsigned long long)(4*2-1); | |
752 | sb->super_offset = __cpu_to_le64(ds); | |
753 | sb->data_size = __cpu_to_le64( | |
754 | ds - __le64_to_cpu(sb->data_offset)); | |
755 | } | |
756 | } | |
757 | } else if (strcmp(update, "linear-grow-update") == 0) { | |
758 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
759 | sb->dev_roles[info->disk.number] = | |
760 | __cpu_to_le16(info->disk.raid_disk); | |
761 | } else if (strcmp(update, "resync") == 0) { | |
762 | /* make sure resync happens */ | |
763 | sb->resync_offset = 0ULL; | |
764 | } else if (strcmp(update, "uuid") == 0) { | |
765 | copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid); | |
766 | ||
767 | if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
768 | struct bitmap_super_s *bm; | |
769 | bm = (struct bitmap_super_s*)(st->sb+1024); | |
770 | memcpy(bm->uuid, sb->set_uuid, 16); | |
771 | } | |
772 | } else if (strcmp(update, "no-bitmap") == 0) { | |
773 | sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); | |
774 | } else if (strcmp(update, "homehost") == 0 && | |
775 | homehost) { | |
776 | char *c; | |
777 | update = "name"; | |
778 | c = strchr(sb->set_name, ':'); | |
779 | if (c) | |
780 | strncpy(info->name, c+1, 31 - (c-sb->set_name)); | |
781 | else | |
782 | strncpy(info->name, sb->set_name, 32); | |
783 | info->name[32] = 0; | |
784 | } else if (strcmp(update, "name") == 0) { | |
785 | if (info->name[0] == 0) | |
786 | sprintf(info->name, "%d", info->array.md_minor); | |
787 | memset(sb->set_name, 0, sizeof(sb->set_name)); | |
788 | if (homehost && | |
789 | strchr(info->name, ':') == NULL && | |
790 | strlen(homehost)+1+strlen(info->name) < 32) { | |
791 | strcpy(sb->set_name, homehost); | |
792 | strcat(sb->set_name, ":"); | |
793 | strcat(sb->set_name, info->name); | |
794 | } else | |
795 | strcpy(sb->set_name, info->name); | |
796 | } else if (strcmp(update, "devicesize") == 0 && | |
797 | __le64_to_cpu(sb->super_offset) < | |
798 | __le64_to_cpu(sb->data_offset)) { | |
799 | /* set data_size to device size less data_offset */ | |
800 | struct misc_dev_info *misc = (struct misc_dev_info*) | |
801 | (st->sb + 1024 + 512); | |
802 | printf("Size was %llu\n", (unsigned long long) | |
803 | __le64_to_cpu(sb->data_size)); | |
804 | sb->data_size = __cpu_to_le64( | |
805 | misc->device_size - __le64_to_cpu(sb->data_offset)); | |
806 | printf("Size is %llu\n", (unsigned long long) | |
807 | __le64_to_cpu(sb->data_size)); | |
808 | } else if (strcmp(update, "_reshape_progress")==0) | |
809 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
810 | else if (strcmp(update, "writemostly")==0) | |
811 | sb->devflags |= WriteMostly1; | |
812 | else if (strcmp(update, "readwrite")==0) | |
813 | sb->devflags &= ~WriteMostly1; | |
814 | else | |
815 | rv = -1; | |
816 | ||
817 | sb->sb_csum = calc_sb_1_csum(sb); | |
818 | return rv; | |
819 | } | |
820 | ||
821 | static int init_super1(struct supertype *st, mdu_array_info_t *info, | |
822 | unsigned long long size, char *name, char *homehost, int *uuid) | |
823 | { | |
824 | struct mdp_superblock_1 *sb; | |
825 | int spares; | |
826 | int rfd; | |
827 | char defname[10]; | |
828 | ||
829 | if (posix_memalign((void**)&sb, 512, (1024 + 512 + | |
830 | sizeof(struct misc_dev_info))) != 0) { | |
831 | fprintf(stderr, Name | |
832 | ": %s could not allocate superblock\n", __func__); | |
833 | return 0; | |
834 | } | |
835 | memset(sb, 0, 1024); | |
836 | ||
837 | st->sb = sb; | |
838 | if (info == NULL) { | |
839 | /* zeroing superblock */ | |
840 | return 0; | |
841 | } | |
842 | ||
843 | spares = info->working_disks - info->active_disks; | |
844 | if (info->raid_disks + spares > 384) { | |
845 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
846 | info->raid_disks , spares, 384); | |
847 | return 0; | |
848 | } | |
849 | ||
850 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
851 | sb->major_version = __cpu_to_le32(1); | |
852 | sb->feature_map = 0; | |
853 | sb->pad0 = 0; | |
854 | ||
855 | if (uuid) | |
856 | copy_uuid(sb->set_uuid, uuid, super1.swapuuid); | |
857 | else { | |
858 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
859 | read(rfd, sb->set_uuid, 16) != 16) { | |
860 | __u32 r[4] = {random(), random(), random(), random()}; | |
861 | memcpy(sb->set_uuid, r, 16); | |
862 | } | |
863 | if (rfd >= 0) close(rfd); | |
864 | } | |
865 | ||
866 | if (name == NULL || *name == 0) { | |
867 | sprintf(defname, "%d", info->md_minor); | |
868 | name = defname; | |
869 | } | |
870 | memset(sb->set_name, 0, 32); | |
871 | if (homehost && | |
872 | strchr(name, ':')== NULL && | |
873 | strlen(homehost)+1+strlen(name) < 32) { | |
874 | strcpy(sb->set_name, homehost); | |
875 | strcat(sb->set_name, ":"); | |
876 | strcat(sb->set_name, name); | |
877 | } else | |
878 | strcpy(sb->set_name, name); | |
879 | ||
880 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
881 | sb->level = __cpu_to_le32(info->level); | |
882 | sb->layout = __cpu_to_le32(info->layout); | |
883 | sb->size = __cpu_to_le64(size*2ULL); | |
884 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
885 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
886 | ||
887 | sb->data_offset = __cpu_to_le64(0); | |
888 | sb->data_size = __cpu_to_le64(0); | |
889 | sb->super_offset = __cpu_to_le64(0); | |
890 | sb->recovery_offset = __cpu_to_le64(0); | |
891 | ||
892 | sb->utime = sb->ctime; | |
893 | sb->events = __cpu_to_le64(1); | |
894 | if (info->state & (1<<MD_SB_CLEAN)) | |
895 | sb->resync_offset = MaxSector; | |
896 | else | |
897 | sb->resync_offset = 0; | |
898 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ | |
899 | sizeof(sb->dev_roles[0])); | |
900 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
901 | ||
902 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
903 | ||
904 | return 1; | |
905 | } | |
906 | ||
907 | struct devinfo { | |
908 | int fd; | |
909 | char *devname; | |
910 | mdu_disk_info_t disk; | |
911 | struct devinfo *next; | |
912 | }; | |
913 | #ifndef MDASSEMBLE | |
914 | /* Add a device to the superblock being created */ | |
915 | static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk, | |
916 | int fd, char *devname) | |
917 | { | |
918 | struct mdp_superblock_1 *sb = st->sb; | |
919 | __u16 *rp = sb->dev_roles + dk->number; | |
920 | struct devinfo *di, **dip; | |
921 | ||
922 | if ((dk->state & 6) == 6) /* active, sync */ | |
923 | *rp = __cpu_to_le16(dk->raid_disk); | |
924 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ | |
925 | *rp = 0xffff; | |
926 | else | |
927 | *rp = 0xfffe; | |
928 | ||
929 | if (dk->number >= (int)__le32_to_cpu(sb->max_dev) && | |
930 | __le32_to_cpu(sb->max_dev) < 384) | |
931 | sb->max_dev = __cpu_to_le32(dk->number+1); | |
932 | ||
933 | sb->dev_number = __cpu_to_le32(dk->number); | |
934 | sb->devflags = 0; /* don't copy another disks flags */ | |
935 | sb->sb_csum = calc_sb_1_csum(sb); | |
936 | ||
937 | dip = (struct devinfo **)&st->info; | |
938 | while (*dip) | |
939 | dip = &(*dip)->next; | |
940 | di = malloc(sizeof(struct devinfo)); | |
941 | di->fd = fd; | |
942 | di->devname = devname; | |
943 | di->disk = *dk; | |
944 | di->next = NULL; | |
945 | *dip = di; | |
946 | ||
947 | return 0; | |
948 | } | |
949 | #endif | |
950 | ||
951 | static void locate_bitmap1(struct supertype *st, int fd); | |
952 | ||
953 | static int store_super1(struct supertype *st, int fd) | |
954 | { | |
955 | struct mdp_superblock_1 *sb = st->sb; | |
956 | unsigned long long sb_offset; | |
957 | int sbsize; | |
958 | unsigned long long dsize; | |
959 | ||
960 | if (!get_dev_size(fd, NULL, &dsize)) | |
961 | return 1; | |
962 | ||
963 | dsize >>= 9; | |
964 | ||
965 | if (dsize < 24) | |
966 | return 2; | |
967 | ||
968 | /* | |
969 | * Calculate the position of the superblock. | |
970 | * It is always aligned to a 4K boundary and | |
971 | * depending on minor_version, it can be: | |
972 | * 0: At least 8K, but less than 12K, from end of device | |
973 | * 1: At start of device | |
974 | * 2: 4K from start of device. | |
975 | */ | |
976 | switch(st->minor_version) { | |
977 | case 0: | |
978 | sb_offset = dsize; | |
979 | sb_offset -= 8*2; | |
980 | sb_offset &= ~(4*2-1); | |
981 | break; | |
982 | case 1: | |
983 | sb_offset = 0; | |
984 | break; | |
985 | case 2: | |
986 | sb_offset = 4*2; | |
987 | break; | |
988 | default: | |
989 | return -EINVAL; | |
990 | } | |
991 | ||
992 | ||
993 | ||
994 | if (sb_offset != __le64_to_cpu(sb->super_offset) && | |
995 | 0 != __le64_to_cpu(sb->super_offset) | |
996 | ) { | |
997 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
998 | abort(); | |
999 | } | |
1000 | ||
1001 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) | |
1002 | return 3; | |
1003 | ||
1004 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
1005 | sbsize = (sbsize+511)&(~511UL); | |
1006 | ||
1007 | if (awrite(fd, sb, sbsize) != sbsize) | |
1008 | return 4; | |
1009 | ||
1010 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
1011 | struct bitmap_super_s *bm = (struct bitmap_super_s*) | |
1012 | (((char*)sb)+1024); | |
1013 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { | |
1014 | locate_bitmap1(st, fd); | |
1015 | if (awrite(fd, bm, sizeof(*bm)) != | |
1016 | sizeof(*bm)) | |
1017 | return 5; | |
1018 | } | |
1019 | } | |
1020 | fsync(fd); | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | static int load_super1(struct supertype *st, int fd, char *devname); | |
1025 | ||
1026 | static unsigned long choose_bm_space(unsigned long devsize) | |
1027 | { | |
1028 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, | |
1029 | * if bigger than 200Gig, save 128k | |
1030 | * NOTE: result must be multiple of 4K else bad things happen | |
1031 | * on 4K-sector devices. | |
1032 | */ | |
1033 | if (devsize < 64*2) return 0; | |
1034 | if (devsize - 64*2 >= 200*1024*1024*2) | |
1035 | return 128*2; | |
1036 | if (devsize - 4*2 > 8*1024*1024*2) | |
1037 | return 64*2; | |
1038 | return 4*2; | |
1039 | } | |
1040 | ||
1041 | static void free_super1(struct supertype *st); | |
1042 | ||
1043 | #ifndef MDASSEMBLE | |
1044 | static int write_init_super1(struct supertype *st) | |
1045 | { | |
1046 | struct mdp_superblock_1 *sb = st->sb; | |
1047 | struct supertype *refst; | |
1048 | int rfd; | |
1049 | int rv = 0; | |
1050 | unsigned long long bm_space; | |
1051 | unsigned long long reserved; | |
1052 | struct devinfo *di; | |
1053 | unsigned long long dsize, array_size; | |
1054 | unsigned long long sb_offset; | |
1055 | ||
1056 | for (di = st->info; di && ! rv ; di = di->next) { | |
1057 | if (di->disk.state == 1) | |
1058 | continue; | |
1059 | if (di->fd < 0) | |
1060 | continue; | |
1061 | ||
1062 | while (Kill(di->devname, NULL, 0, 1, 1) == 0) | |
1063 | ; | |
1064 | ||
1065 | sb->dev_number = __cpu_to_le32(di->disk.number); | |
1066 | if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY)) | |
1067 | sb->devflags |= __cpu_to_le32(WriteMostly1); | |
1068 | else | |
1069 | sb->devflags &= ~(__cpu_to_le32(WriteMostly1)); | |
1070 | ||
1071 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
1072 | read(rfd, sb->device_uuid, 16) != 16) { | |
1073 | __u32 r[4] = {random(), random(), random(), random()}; | |
1074 | memcpy(sb->device_uuid, r, 16); | |
1075 | } | |
1076 | if (rfd >= 0) | |
1077 | close(rfd); | |
1078 | ||
1079 | sb->events = 0; | |
1080 | ||
1081 | refst = dup_super(st); | |
1082 | if (load_super1(refst, di->fd, NULL)==0) { | |
1083 | struct mdp_superblock_1 *refsb = refst->sb; | |
1084 | ||
1085 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
1086 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
1087 | /* same array, so preserve events and | |
1088 | * dev_number */ | |
1089 | sb->events = refsb->events; | |
1090 | /* bugs in 2.6.17 and earlier mean the | |
1091 | * dev_number chosen in Manage must be preserved | |
1092 | */ | |
1093 | if (get_linux_version() >= 2006018) | |
1094 | sb->dev_number = refsb->dev_number; | |
1095 | } | |
1096 | free_super1(refst); | |
1097 | } | |
1098 | free(refst); | |
1099 | ||
1100 | if (!get_dev_size(di->fd, NULL, &dsize)) | |
1101 | return 1; | |
1102 | dsize >>= 9; | |
1103 | ||
1104 | if (dsize < 24) { | |
1105 | close(di->fd); | |
1106 | return 2; | |
1107 | } | |
1108 | ||
1109 | ||
1110 | /* | |
1111 | * Calculate the position of the superblock. | |
1112 | * It is always aligned to a 4K boundary and | |
1113 | * depending on minor_version, it can be: | |
1114 | * 0: At least 8K, but less than 12K, from end of device | |
1115 | * 1: At start of device | |
1116 | * 2: 4K from start of device. | |
1117 | * Depending on the array size, we might leave extra space | |
1118 | * for a bitmap. | |
1119 | */ | |
1120 | array_size = __le64_to_cpu(sb->size); | |
1121 | /* work out how much space we left for a bitmap */ | |
1122 | bm_space = choose_bm_space(array_size); | |
1123 | ||
1124 | switch(st->minor_version) { | |
1125 | case 0: | |
1126 | sb_offset = dsize; | |
1127 | sb_offset -= 8*2; | |
1128 | sb_offset &= ~(4*2-1); | |
1129 | sb->super_offset = __cpu_to_le64(sb_offset); | |
1130 | sb->data_offset = __cpu_to_le64(0); | |
1131 | if (sb_offset < array_size + bm_space) | |
1132 | bm_space = sb_offset - array_size; | |
1133 | sb->data_size = __cpu_to_le64(sb_offset - bm_space); | |
1134 | break; | |
1135 | case 1: | |
1136 | sb->super_offset = __cpu_to_le64(0); | |
1137 | reserved = bm_space + 4*2; | |
1138 | /* Try for multiple of 1Meg so it is nicely aligned */ | |
1139 | #define ONE_MEG (2*1024) | |
1140 | reserved = ((reserved + ONE_MEG-1)/ONE_MEG) * ONE_MEG; | |
1141 | if (reserved + __le64_to_cpu(sb->size) > dsize) | |
1142 | reserved = dsize - __le64_to_cpu(sb->size); | |
1143 | /* force 4K alignment */ | |
1144 | reserved &= ~7ULL; | |
1145 | ||
1146 | sb->data_offset = __cpu_to_le64(reserved); | |
1147 | sb->data_size = __cpu_to_le64(dsize - reserved); | |
1148 | break; | |
1149 | case 2: | |
1150 | sb_offset = 4*2; | |
1151 | sb->super_offset = __cpu_to_le64(4*2); | |
1152 | if (4*2 + 4*2 + bm_space + __le64_to_cpu(sb->size) | |
1153 | > dsize) | |
1154 | bm_space = dsize - __le64_to_cpu(sb->size) | |
1155 | - 4*2 - 4*2; | |
1156 | ||
1157 | reserved = bm_space + 4*2 + 4*2; | |
1158 | /* Try for multiple of 1Meg so it is nicely aligned */ | |
1159 | #define ONE_MEG (2*1024) | |
1160 | reserved = ((reserved + ONE_MEG-1)/ONE_MEG) * ONE_MEG; | |
1161 | if (reserved + __le64_to_cpu(sb->size) > dsize) | |
1162 | reserved = dsize - __le64_to_cpu(sb->size); | |
1163 | /* force 4K alignment */ | |
1164 | reserved &= ~7ULL; | |
1165 | ||
1166 | sb->data_offset = __cpu_to_le64(reserved); | |
1167 | sb->data_size = __cpu_to_le64(dsize - reserved); | |
1168 | break; | |
1169 | default: | |
1170 | return -EINVAL; | |
1171 | } | |
1172 | ||
1173 | ||
1174 | sb->sb_csum = calc_sb_1_csum(sb); | |
1175 | rv = store_super1(st, di->fd); | |
1176 | if (rv) | |
1177 | fprintf(stderr, | |
1178 | Name ": failed to write superblock to %s\n", | |
1179 | di->devname); | |
1180 | ||
1181 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) | |
1182 | rv = st->ss->write_bitmap(st, di->fd); | |
1183 | close(di->fd); | |
1184 | di->fd = -1; | |
1185 | } | |
1186 | return rv; | |
1187 | } | |
1188 | #endif | |
1189 | ||
1190 | static int compare_super1(struct supertype *st, struct supertype *tst) | |
1191 | { | |
1192 | /* | |
1193 | * return: | |
1194 | * 0 same, or first was empty, and second was copied | |
1195 | * 1 second had wrong number | |
1196 | * 2 wrong uuid | |
1197 | * 3 wrong other info | |
1198 | */ | |
1199 | struct mdp_superblock_1 *first = st->sb; | |
1200 | struct mdp_superblock_1 *second = tst->sb; | |
1201 | ||
1202 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
1203 | return 1; | |
1204 | if (second->major_version != __cpu_to_le32(1)) | |
1205 | return 1; | |
1206 | ||
1207 | if (!first) { | |
1208 | if (posix_memalign((void**)&first, 512, | |
1209 | 1024 + 512 + | |
1210 | sizeof(struct misc_dev_info)) != 0) { | |
1211 | fprintf(stderr, Name | |
1212 | ": %s could not allocate superblock\n", __func__); | |
1213 | return 1; | |
1214 | } | |
1215 | memcpy(first, second, 1024 + 512 + | |
1216 | sizeof(struct misc_dev_info)); | |
1217 | st->sb = first; | |
1218 | return 0; | |
1219 | } | |
1220 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
1221 | return 2; | |
1222 | ||
1223 | if (first->ctime != second->ctime || | |
1224 | first->level != second->level || | |
1225 | first->layout != second->layout || | |
1226 | first->size != second->size || | |
1227 | first->chunksize != second->chunksize || | |
1228 | first->raid_disks != second->raid_disks) | |
1229 | return 3; | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | static int load_super1(struct supertype *st, int fd, char *devname) | |
1234 | { | |
1235 | unsigned long long dsize; | |
1236 | unsigned long long sb_offset; | |
1237 | struct mdp_superblock_1 *super; | |
1238 | int uuid[4]; | |
1239 | struct bitmap_super_s *bsb; | |
1240 | struct misc_dev_info *misc; | |
1241 | ||
1242 | free_super1(st); | |
1243 | ||
1244 | if (st->ss == NULL || st->minor_version == -1) { | |
1245 | int bestvers = -1; | |
1246 | struct supertype tst; | |
1247 | __u64 bestctime = 0; | |
1248 | /* guess... choose latest ctime */ | |
1249 | memset(&tst, 0, sizeof(tst)); | |
1250 | tst.ss = &super1; | |
1251 | for (tst.minor_version = 0; tst.minor_version <= 2 ; tst.minor_version++) { | |
1252 | switch(load_super1(&tst, fd, devname)) { | |
1253 | case 0: super = tst.sb; | |
1254 | if (bestvers == -1 || | |
1255 | bestctime < __le64_to_cpu(super->ctime)) { | |
1256 | bestvers = tst.minor_version; | |
1257 | bestctime = __le64_to_cpu(super->ctime); | |
1258 | } | |
1259 | free(super); | |
1260 | tst.sb = NULL; | |
1261 | break; | |
1262 | case 1: return 1; /*bad device */ | |
1263 | case 2: break; /* bad, try next */ | |
1264 | } | |
1265 | } | |
1266 | if (bestvers != -1) { | |
1267 | int rv; | |
1268 | tst.minor_version = bestvers; | |
1269 | tst.ss = &super1; | |
1270 | tst.max_devs = 384; | |
1271 | rv = load_super1(&tst, fd, devname); | |
1272 | if (rv == 0) | |
1273 | *st = tst; | |
1274 | return rv; | |
1275 | } | |
1276 | return 2; | |
1277 | } | |
1278 | if (!get_dev_size(fd, devname, &dsize)) | |
1279 | return 1; | |
1280 | dsize >>= 9; | |
1281 | ||
1282 | if (dsize < 24) { | |
1283 | if (devname) | |
1284 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", | |
1285 | devname, dsize); | |
1286 | return 1; | |
1287 | } | |
1288 | ||
1289 | /* | |
1290 | * Calculate the position of the superblock. | |
1291 | * It is always aligned to a 4K boundary and | |
1292 | * depending on minor_version, it can be: | |
1293 | * 0: At least 8K, but less than 12K, from end of device | |
1294 | * 1: At start of device | |
1295 | * 2: 4K from start of device. | |
1296 | */ | |
1297 | switch(st->minor_version) { | |
1298 | case 0: | |
1299 | sb_offset = dsize; | |
1300 | sb_offset -= 8*2; | |
1301 | sb_offset &= ~(4*2-1); | |
1302 | break; | |
1303 | case 1: | |
1304 | sb_offset = 0; | |
1305 | break; | |
1306 | case 2: | |
1307 | sb_offset = 4*2; | |
1308 | break; | |
1309 | default: | |
1310 | return -EINVAL; | |
1311 | } | |
1312 | ||
1313 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
1314 | ||
1315 | ||
1316 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
1317 | if (devname) | |
1318 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
1319 | devname, strerror(errno)); | |
1320 | return 1; | |
1321 | } | |
1322 | ||
1323 | if (posix_memalign((void**)&super, 512, | |
1324 | 1024 + 512 + | |
1325 | sizeof(struct misc_dev_info)) != 0) { | |
1326 | fprintf(stderr, Name ": %s could not allocate superblock\n", | |
1327 | __func__); | |
1328 | return 1; | |
1329 | } | |
1330 | ||
1331 | if (aread(fd, super, 1024) != 1024) { | |
1332 | if (devname) | |
1333 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
1334 | devname); | |
1335 | free(super); | |
1336 | return 1; | |
1337 | } | |
1338 | ||
1339 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
1340 | if (devname) | |
1341 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
1342 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
1343 | free(super); | |
1344 | return 2; | |
1345 | } | |
1346 | ||
1347 | if (__le32_to_cpu(super->major_version) != 1) { | |
1348 | if (devname) | |
1349 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
1350 | devname, __le32_to_cpu(super->major_version)); | |
1351 | free(super); | |
1352 | return 2; | |
1353 | } | |
1354 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
1355 | if (devname) | |
1356 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
1357 | devname); | |
1358 | free(super); | |
1359 | return 2; | |
1360 | } | |
1361 | st->sb = super; | |
1362 | ||
1363 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1364 | ||
1365 | misc = (struct misc_dev_info*) (((char*)super)+1024+512); | |
1366 | misc->device_size = dsize; | |
1367 | ||
1368 | /* Now check on the bitmap superblock */ | |
1369 | if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0) | |
1370 | return 0; | |
1371 | /* Read the bitmap superblock and make sure it looks | |
1372 | * valid. If it doesn't clear the bit. An --assemble --force | |
1373 | * should get that written out. | |
1374 | */ | |
1375 | locate_bitmap1(st, fd); | |
1376 | if (aread(fd, ((char*)super)+1024, 512) | |
1377 | != 512) | |
1378 | goto no_bitmap; | |
1379 | ||
1380 | uuid_from_super1(st, uuid); | |
1381 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
1382 | memcmp(bsb->uuid, uuid, 16) != 0) | |
1383 | goto no_bitmap; | |
1384 | return 0; | |
1385 | ||
1386 | no_bitmap: | |
1387 | super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1); | |
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | ||
1392 | static struct supertype *match_metadata_desc1(char *arg) | |
1393 | { | |
1394 | struct supertype *st = malloc(sizeof(*st)); | |
1395 | if (!st) return st; | |
1396 | ||
1397 | memset(st, 0, sizeof(*st)); | |
1398 | st->container_dev = NoMdDev; | |
1399 | st->ss = &super1; | |
1400 | st->max_devs = 384; | |
1401 | st->sb = NULL; | |
1402 | /* leading zeros can be safely ignored. --detail generates them. */ | |
1403 | while (*arg == '0') | |
1404 | arg++; | |
1405 | if (strcmp(arg, "1.0") == 0 || | |
1406 | strcmp(arg, "1.00") == 0) { | |
1407 | st->minor_version = 0; | |
1408 | return st; | |
1409 | } | |
1410 | if (strcmp(arg, "1.1") == 0 || | |
1411 | strcmp(arg, "1.01") == 0 | |
1412 | ) { | |
1413 | st->minor_version = 1; | |
1414 | return st; | |
1415 | } | |
1416 | if (strcmp(arg, "1.2") == 0 || | |
1417 | #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */ | |
1418 | strcmp(arg, "default") == 0 || | |
1419 | #endif /* DEFAULT_OLD_METADATA */ | |
1420 | strcmp(arg, "1.02") == 0) { | |
1421 | st->minor_version = 2; | |
1422 | return st; | |
1423 | } | |
1424 | if (strcmp(arg, "1") == 0 || | |
1425 | strcmp(arg, "default") == 0) { | |
1426 | st->minor_version = -1; | |
1427 | return st; | |
1428 | } | |
1429 | ||
1430 | free(st); | |
1431 | return NULL; | |
1432 | } | |
1433 | ||
1434 | /* find available size on device with this devsize, using | |
1435 | * superblock type st, and reserving 'reserve' sectors for | |
1436 | * a possible bitmap | |
1437 | */ | |
1438 | static __u64 avail_size1(struct supertype *st, __u64 devsize) | |
1439 | { | |
1440 | struct mdp_superblock_1 *super = st->sb; | |
1441 | if (devsize < 24) | |
1442 | return 0; | |
1443 | ||
1444 | if (super == NULL) | |
1445 | /* creating: allow suitable space for bitmap */ | |
1446 | devsize -= choose_bm_space(devsize); | |
1447 | #ifndef MDASSEMBLE | |
1448 | else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
1449 | /* hot-add. allow for actual size of bitmap */ | |
1450 | struct bitmap_super_s *bsb; | |
1451 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1452 | devsize -= bitmap_sectors(bsb); | |
1453 | } | |
1454 | #endif | |
1455 | ||
1456 | if (st->minor_version < 0) | |
1457 | /* not specified, so time to set default */ | |
1458 | st->minor_version = 2; | |
1459 | if (super == NULL && st->minor_version > 0) { | |
1460 | /* haven't committed to a size yet, so allow some | |
1461 | * slack for alignment of data_offset. | |
1462 | * We haven't access to device details so allow | |
1463 | * 1 Meg if bigger than 1Gig | |
1464 | */ | |
1465 | if (devsize > 1024*1024*2) | |
1466 | devsize -= 1024*2; | |
1467 | } | |
1468 | switch(st->minor_version) { | |
1469 | case 0: | |
1470 | /* at end */ | |
1471 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
1472 | case 1: | |
1473 | /* at start, 4K for superblock and possible bitmap */ | |
1474 | return devsize - 4*2; | |
1475 | case 2: | |
1476 | /* 4k from start, 4K for superblock and possible bitmap */ | |
1477 | return devsize - (4+4)*2; | |
1478 | } | |
1479 | return 0; | |
1480 | } | |
1481 | ||
1482 | static int | |
1483 | add_internal_bitmap1(struct supertype *st, | |
1484 | int *chunkp, int delay, int write_behind, | |
1485 | unsigned long long size, | |
1486 | int may_change, int major) | |
1487 | { | |
1488 | /* | |
1489 | * If not may_change, then this is a 'Grow', and the bitmap | |
1490 | * must fit after the superblock. | |
1491 | * If may_change, then this is create, and we can put the bitmap | |
1492 | * before the superblock if we like, or may move the start. | |
1493 | * If !may_change, the bitmap MUST live at offset of 1K, until | |
1494 | * we get a sysfs interface. | |
1495 | * | |
1496 | * size is in sectors, chunk is in bytes !!! | |
1497 | */ | |
1498 | ||
1499 | unsigned long long bits; | |
1500 | unsigned long long max_bits; | |
1501 | unsigned long long min_chunk; | |
1502 | long offset; | |
1503 | unsigned long long chunk = *chunkp; | |
1504 | int room = 0; | |
1505 | struct mdp_superblock_1 *sb = st->sb; | |
1506 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
1507 | int uuid[4]; | |
1508 | ||
1509 | switch(st->minor_version) { | |
1510 | case 0: | |
1511 | /* either 3K after the superblock (when hot-add), | |
1512 | * or some amount of space before. | |
1513 | */ | |
1514 | if (may_change) { | |
1515 | /* We are creating array, so we *know* how much room has | |
1516 | * been left. | |
1517 | */ | |
1518 | offset = 0; | |
1519 | room = choose_bm_space(__le64_to_cpu(sb->size)); | |
1520 | } else { | |
1521 | room = __le64_to_cpu(sb->super_offset) | |
1522 | - __le64_to_cpu(sb->data_offset) | |
1523 | - __le64_to_cpu(sb->data_size); | |
1524 | /* remove '1 ||' when we can set offset via sysfs */ | |
1525 | if (1 || (room < 3*2 && | |
1526 | __le32_to_cpu(sb->max_dev) <= 384)) { | |
1527 | room = 3*2; | |
1528 | offset = 1*2; | |
1529 | } else { | |
1530 | offset = 0; /* means movable offset */ | |
1531 | } | |
1532 | } | |
1533 | break; | |
1534 | case 1: | |
1535 | case 2: /* between superblock and data */ | |
1536 | if (may_change) { | |
1537 | offset = 4*2; | |
1538 | room = choose_bm_space(__le64_to_cpu(sb->size)); | |
1539 | } else { | |
1540 | room = __le64_to_cpu(sb->data_offset) | |
1541 | - __le64_to_cpu(sb->super_offset); | |
1542 | if (1 || __le32_to_cpu(sb->max_dev) <= 384) { | |
1543 | room -= 2; | |
1544 | offset = 2; | |
1545 | } else { | |
1546 | room -= 4*2; | |
1547 | offset = 4*2; | |
1548 | } | |
1549 | } | |
1550 | break; | |
1551 | default: | |
1552 | return 0; | |
1553 | } | |
1554 | ||
1555 | if (chunk == UnSet && room > 128*2) | |
1556 | /* Limit to 128K of bitmap when chunk size not requested */ | |
1557 | room = 128*2; | |
1558 | ||
1559 | max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8; | |
1560 | ||
1561 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
1562 | bits = (size*512)/min_chunk +1; | |
1563 | while (bits > max_bits) { | |
1564 | min_chunk *= 2; | |
1565 | bits = (bits+1)/2; | |
1566 | } | |
1567 | if (chunk == UnSet) { | |
1568 | /* For practical purpose, 64Meg is a good | |
1569 | * default chunk size for internal bitmaps. | |
1570 | */ | |
1571 | chunk = min_chunk; | |
1572 | if (chunk < 64*1024*1024) | |
1573 | chunk = 64*1024*1024; | |
1574 | } else if (chunk < min_chunk) | |
1575 | return 0; /* chunk size too small */ | |
1576 | if (chunk == 0) /* rounding problem */ | |
1577 | return 0; | |
1578 | ||
1579 | if (offset == 0) { | |
1580 | /* start bitmap on a 4K boundary with enough space for | |
1581 | * the bitmap | |
1582 | */ | |
1583 | bits = (size*512) / chunk + 1; | |
1584 | room = ((bits+7)/8 + sizeof(bitmap_super_t) +4095)/4096; | |
1585 | room *= 8; /* convert 4K blocks to sectors */ | |
1586 | offset = -room; | |
1587 | } | |
1588 | ||
1589 | sb->bitmap_offset = __cpu_to_le32(offset); | |
1590 | ||
1591 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); | |
1592 | memset(bms, 0, sizeof(*bms)); | |
1593 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); | |
1594 | bms->version = __cpu_to_le32(major); | |
1595 | uuid_from_super1(st, uuid); | |
1596 | memcpy(bms->uuid, uuid, 16); | |
1597 | bms->chunksize = __cpu_to_le32(chunk); | |
1598 | bms->daemon_sleep = __cpu_to_le32(delay); | |
1599 | bms->sync_size = __cpu_to_le64(size); | |
1600 | bms->write_behind = __cpu_to_le32(write_behind); | |
1601 | ||
1602 | *chunkp = chunk; | |
1603 | return 1; | |
1604 | } | |
1605 | ||
1606 | ||
1607 | static void locate_bitmap1(struct supertype *st, int fd) | |
1608 | { | |
1609 | unsigned long long offset; | |
1610 | struct mdp_superblock_1 *sb; | |
1611 | int mustfree = 0; | |
1612 | ||
1613 | if (!st->sb) { | |
1614 | if (st->ss->load_super(st, fd, NULL)) | |
1615 | return; /* no error I hope... */ | |
1616 | mustfree = 1; | |
1617 | } | |
1618 | sb = st->sb; | |
1619 | ||
1620 | offset = __le64_to_cpu(sb->super_offset); | |
1621 | offset += (int32_t) __le32_to_cpu(sb->bitmap_offset); | |
1622 | if (mustfree) | |
1623 | free(sb); | |
1624 | lseek64(fd, offset<<9, 0); | |
1625 | } | |
1626 | ||
1627 | static int write_bitmap1(struct supertype *st, int fd) | |
1628 | { | |
1629 | struct mdp_superblock_1 *sb = st->sb; | |
1630 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); | |
1631 | int rv = 0; | |
1632 | ||
1633 | int towrite, n; | |
1634 | char *buf = (char*)(((long)(abuf+4096))&~4095UL); | |
1635 | ||
1636 | locate_bitmap1(st, fd); | |
1637 | ||
1638 | memset(buf, 0xff, 4096); | |
1639 | memcpy(buf, ((char*)sb)+1024, sizeof(bitmap_super_t)); | |
1640 | ||
1641 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); | |
1642 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
1643 | towrite += sizeof(bitmap_super_t); | |
1644 | towrite = ROUND_UP(towrite, 512); | |
1645 | while (towrite > 0) { | |
1646 | n = towrite; | |
1647 | if (n > 4096) | |
1648 | n = 4096; | |
1649 | n = write(fd, buf, n); | |
1650 | if (n > 0) | |
1651 | towrite -= n; | |
1652 | else | |
1653 | break; | |
1654 | memset(buf, 0xff, 4096); | |
1655 | } | |
1656 | fsync(fd); | |
1657 | if (towrite) | |
1658 | rv = -2; | |
1659 | ||
1660 | return rv; | |
1661 | } | |
1662 | ||
1663 | static void free_super1(struct supertype *st) | |
1664 | { | |
1665 | if (st->sb) | |
1666 | free(st->sb); | |
1667 | while (st->info) { | |
1668 | struct devinfo *di = st->info; | |
1669 | st->info = di->next; | |
1670 | if (di->fd >= 0) | |
1671 | close(di->fd); | |
1672 | free(di); | |
1673 | } | |
1674 | st->sb = NULL; | |
1675 | } | |
1676 | ||
1677 | #ifndef MDASSEMBLE | |
1678 | static int validate_geometry1(struct supertype *st, int level, | |
1679 | int layout, int raiddisks, | |
1680 | int *chunk, unsigned long long size, | |
1681 | char *subdev, unsigned long long *freesize, | |
1682 | int verbose) | |
1683 | { | |
1684 | unsigned long long ldsize; | |
1685 | int fd; | |
1686 | ||
1687 | if (level == LEVEL_CONTAINER) { | |
1688 | if (verbose) | |
1689 | fprintf(stderr, Name ": 1.x metadata does not support containers\n"); | |
1690 | return 0; | |
1691 | } | |
1692 | if (chunk && *chunk == UnSet) | |
1693 | *chunk = DEFAULT_CHUNK; | |
1694 | ||
1695 | if (!subdev) | |
1696 | return 1; | |
1697 | ||
1698 | fd = open(subdev, O_RDONLY|O_EXCL, 0); | |
1699 | if (fd < 0) { | |
1700 | if (verbose) | |
1701 | fprintf(stderr, Name ": super1.x cannot open %s: %s\n", | |
1702 | subdev, strerror(errno)); | |
1703 | return 0; | |
1704 | } | |
1705 | ||
1706 | if (!get_dev_size(fd, subdev, &ldsize)) { | |
1707 | close(fd); | |
1708 | return 0; | |
1709 | } | |
1710 | close(fd); | |
1711 | ||
1712 | *freesize = avail_size1(st, ldsize >> 9); | |
1713 | return 1; | |
1714 | } | |
1715 | #endif /* MDASSEMBLE */ | |
1716 | ||
1717 | struct superswitch super1 = { | |
1718 | #ifndef MDASSEMBLE | |
1719 | .examine_super = examine_super1, | |
1720 | .brief_examine_super = brief_examine_super1, | |
1721 | .export_examine_super = export_examine_super1, | |
1722 | .detail_super = detail_super1, | |
1723 | .brief_detail_super = brief_detail_super1, | |
1724 | .export_detail_super = export_detail_super1, | |
1725 | .write_init_super = write_init_super1, | |
1726 | .validate_geometry = validate_geometry1, | |
1727 | .add_to_super = add_to_super1, | |
1728 | #endif | |
1729 | .match_home = match_home1, | |
1730 | .uuid_from_super = uuid_from_super1, | |
1731 | .getinfo_super = getinfo_super1, | |
1732 | .container_content = container_content1, | |
1733 | .update_super = update_super1, | |
1734 | .init_super = init_super1, | |
1735 | .store_super = store_super1, | |
1736 | .compare_super = compare_super1, | |
1737 | .load_super = load_super1, | |
1738 | .match_metadata_desc = match_metadata_desc1, | |
1739 | .avail_size = avail_size1, | |
1740 | .add_internal_bitmap = add_internal_bitmap1, | |
1741 | .locate_bitmap = locate_bitmap1, | |
1742 | .write_bitmap = write_bitmap1, | |
1743 | .free_super = free_super1, | |
1744 | #if __BYTE_ORDER == BIG_ENDIAN | |
1745 | .swapuuid = 0, | |
1746 | #else | |
1747 | .swapuuid = 1, | |
1748 | #endif | |
1749 | .name = "1.x", | |
1750 | }; |