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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, iosize; | |
147 | char *b; | |
148 | int n; | |
149 | if (ioctl(fd, BLKSSZGET, &bsize) != 0) | |
150 | bsize = 512; | |
151 | ||
152 | if (bsize > 4096 || len > 4096) | |
153 | return -1; | |
154 | b = (char*)(((long)(abuf+4096))&~4095UL); | |
155 | ||
156 | for (iosize = 0; iosize < len; iosize += bsize) | |
157 | ; | |
158 | n = read(fd, b, iosize); | |
159 | if (n <= 0) | |
160 | return n; | |
161 | lseek(fd, len - n, 1); | |
162 | if (n > len) | |
163 | n = len; | |
164 | memcpy(buf, b, n); | |
165 | return n; | |
166 | } | |
167 | ||
168 | static int awrite(int fd, void *buf, int len) | |
169 | { | |
170 | /* aligned write. | |
171 | * On devices with a 4K sector size, we need to write | |
172 | * the full sector. We pre-read if the sector is larger | |
173 | * than the write. | |
174 | * The address must be sector-aligned. | |
175 | */ | |
176 | int bsize, iosize; | |
177 | char *b; | |
178 | int n; | |
179 | if (ioctl(fd, BLKSSZGET, &bsize) != 0) | |
180 | bsize = 512; | |
181 | if (bsize > 4096 || len > 4096) | |
182 | return -1; | |
183 | b = (char*)(((long)(abuf+4096))&~4095UL); | |
184 | ||
185 | for (iosize = 0; iosize < len ; iosize += bsize) | |
186 | ; | |
187 | ||
188 | if (len != iosize) { | |
189 | n = read(fd, b, iosize); | |
190 | if (n <= 0) | |
191 | return n; | |
192 | lseek(fd, -n, 1); | |
193 | } | |
194 | ||
195 | memcpy(b, buf, len); | |
196 | n = write(fd, b, iosize); | |
197 | if (n <= 0) | |
198 | return n; | |
199 | lseek(fd, len - n, 1); | |
200 | return len; | |
201 | } | |
202 | ||
203 | #ifndef MDASSEMBLE | |
204 | static void examine_super1(struct supertype *st, char *homehost) | |
205 | { | |
206 | struct mdp_superblock_1 *sb = st->sb; | |
207 | time_t atime; | |
208 | unsigned int d; | |
209 | int role; | |
210 | int delta_extra = 0; | |
211 | int i; | |
212 | char *c; | |
213 | int l = homehost ? strlen(homehost) : 0; | |
214 | int layout; | |
215 | unsigned long long sb_offset; | |
216 | ||
217 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
218 | printf(" Version : 1"); | |
219 | sb_offset = __le64_to_cpu(sb->super_offset); | |
220 | if (sb_offset <= 4) | |
221 | printf(".1\n"); | |
222 | else if (sb_offset <= 8) | |
223 | printf(".2\n"); | |
224 | else | |
225 | printf(".0\n"); | |
226 | printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); | |
227 | printf(" Array UUID : "); | |
228 | for (i=0; i<16; i++) { | |
229 | if ((i&3)==0 && i != 0) printf(":"); | |
230 | printf("%02x", sb->set_uuid[i]); | |
231 | } | |
232 | printf("\n"); | |
233 | printf(" Name : %.32s", sb->set_name); | |
234 | if (l > 0 && l < 32 && | |
235 | sb->set_name[l] == ':' && | |
236 | strncmp(sb->set_name, homehost, l) == 0) | |
237 | printf(" (local to host %s)", homehost); | |
238 | printf("\n"); | |
239 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
240 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
241 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
242 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
243 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
244 | printf("\n"); | |
245 | printf(" Avail Dev Size : %llu%s\n", | |
246 | (unsigned long long)__le64_to_cpu(sb->data_size), | |
247 | human_size(__le64_to_cpu(sb->data_size)<<9)); | |
248 | if (__le32_to_cpu(sb->level) > 0) { | |
249 | int ddsks=0; | |
250 | switch(__le32_to_cpu(sb->level)) { | |
251 | case 1: ddsks=1;break; | |
252 | case 4: | |
253 | case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break; | |
254 | case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break; | |
255 | case 10: | |
256 | layout = __le32_to_cpu(sb->layout); | |
257 | ddsks = __le32_to_cpu(sb->raid_disks) | |
258 | / (layout&255) / ((layout>>8)&255); | |
259 | } | |
260 | if (ddsks) | |
261 | printf(" Array Size : %llu%s\n", | |
262 | ddsks*(unsigned long long)__le64_to_cpu(sb->size), | |
263 | human_size(ddsks*__le64_to_cpu(sb->size)<<9)); | |
264 | if (sb->size != sb->data_size) | |
265 | printf(" Used Dev Size : %llu%s\n", | |
266 | (unsigned long long)__le64_to_cpu(sb->size), | |
267 | human_size(__le64_to_cpu(sb->size)<<9)); | |
268 | } | |
269 | if (sb->data_offset) | |
270 | printf(" Data Offset : %llu sectors\n", | |
271 | (unsigned long long)__le64_to_cpu(sb->data_offset)); | |
272 | printf(" Super Offset : %llu sectors\n", | |
273 | (unsigned long long)__le64_to_cpu(sb->super_offset)); | |
274 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) | |
275 | printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset)); | |
276 | printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); | |
277 | printf(" Device UUID : "); | |
278 | for (i=0; i<16; i++) { | |
279 | if ((i&3)==0 && i != 0) printf(":"); | |
280 | printf("%02x", sb->device_uuid[i]); | |
281 | } | |
282 | printf("\n"); | |
283 | printf("\n"); | |
284 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
285 | printf("Internal Bitmap : %ld sectors from superblock\n", | |
286 | (long)(int32_t)__le32_to_cpu(sb->bitmap_offset)); | |
287 | } | |
288 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
289 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2, | |
290 | human_size(__le64_to_cpu(sb->reshape_position)<<9)); | |
291 | if (__le32_to_cpu(sb->delta_disks)) { | |
292 | printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks)); | |
293 | printf(" (%d->%d)\n", | |
294 | __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks), | |
295 | __le32_to_cpu(sb->raid_disks)); | |
296 | if ((int)__le32_to_cpu(sb->delta_disks) < 0) | |
297 | delta_extra = -__le32_to_cpu(sb->delta_disks); | |
298 | } | |
299 | if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { | |
300 | c = map_num(pers, __le32_to_cpu(sb->new_level)); | |
301 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
302 | } | |
303 | if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) { | |
304 | if (__le32_to_cpu(sb->level) == 5) { | |
305 | c = map_num(r5layout, __le32_to_cpu(sb->new_layout)); | |
306 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
307 | } | |
308 | if (__le32_to_cpu(sb->level) == 6) { | |
309 | c = map_num(r6layout, __le32_to_cpu(sb->new_layout)); | |
310 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
311 | } | |
312 | if (__le32_to_cpu(sb->level) == 10) { | |
313 | printf(" New Layout :"); | |
314 | print_r10_layout(__le32_to_cpu(sb->new_layout)); | |
315 | printf("\n"); | |
316 | } | |
317 | } | |
318 | if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) | |
319 | printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); | |
320 | printf("\n"); | |
321 | } | |
322 | if (sb->devflags) { | |
323 | printf(" Flags :"); | |
324 | if (sb->devflags & WriteMostly1) | |
325 | printf(" write-mostly"); | |
326 | printf("\n"); | |
327 | } | |
328 | ||
329 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
330 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
331 | ||
332 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
333 | printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); | |
334 | else | |
335 | printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), | |
336 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
337 | printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
338 | printf("\n"); | |
339 | if (__le32_to_cpu(sb->level) == 5) { | |
340 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
341 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
342 | } | |
343 | if (__le32_to_cpu(sb->level) == 6) { | |
344 | c = map_num(r6layout, __le32_to_cpu(sb->layout)); | |
345 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
346 | } | |
347 | if (__le32_to_cpu(sb->level) == 10) { | |
348 | int lo = __le32_to_cpu(sb->layout); | |
349 | printf(" Layout :"); | |
350 | print_r10_layout(lo); | |
351 | printf("\n"); | |
352 | } | |
353 | switch(__le32_to_cpu(sb->level)) { | |
354 | case 0: | |
355 | case 4: | |
356 | case 5: | |
357 | case 6: | |
358 | case 10: | |
359 | printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
360 | break; | |
361 | case -1: | |
362 | printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); | |
363 | break; | |
364 | default: break; | |
365 | } | |
366 | printf("\n"); | |
367 | #if 0 | |
368 | /* This turns out to just be confusing */ | |
369 | printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number)); | |
370 | for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--) | |
371 | if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff) | |
372 | break; | |
373 | for (d=0; d < i; d++) { | |
374 | int role = __le16_to_cpu(sb->dev_roles[d]); | |
375 | if (d) printf(", "); | |
376 | if (role == 0xffff) printf("empty"); | |
377 | else if(role == 0xfffe) printf("failed"); | |
378 | else printf("%d", role); | |
379 | } | |
380 | printf(")\n"); | |
381 | #endif | |
382 | printf(" Device Role : "); | |
383 | d = __le32_to_cpu(sb->dev_number); | |
384 | if (d < __le32_to_cpu(sb->max_dev)) | |
385 | role = __le16_to_cpu(sb->dev_roles[d]); | |
386 | else | |
387 | role = 0xFFFF; | |
388 | if (role >= 0xFFFE) | |
389 | printf("spare\n"); | |
390 | else | |
391 | printf("Active device %d\n", role); | |
392 | ||
393 | printf(" Array State : "); | |
394 | for (d=0; d<__le32_to_cpu(sb->raid_disks) + delta_extra; d++) { | |
395 | int cnt = 0; | |
396 | unsigned int i; | |
397 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
398 | unsigned int role = __le16_to_cpu(sb->dev_roles[i]); | |
399 | if (role == d) | |
400 | cnt++; | |
401 | } | |
402 | if (cnt > 1) printf("?"); | |
403 | else if (cnt == 1) printf("A"); | |
404 | else printf ("."); | |
405 | } | |
406 | #if 0 | |
407 | /* This is confusing too */ | |
408 | faulty = 0; | |
409 | for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { | |
410 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
411 | if (role == 0xFFFE) | |
412 | faulty++; | |
413 | } | |
414 | if (faulty) printf(" %d failed", faulty); | |
415 | #endif | |
416 | printf(" ('A' == active, '.' == missing)"); | |
417 | printf("\n"); | |
418 | } | |
419 | ||
420 | ||
421 | static void brief_examine_super1(struct supertype *st, int verbose) | |
422 | { | |
423 | struct mdp_superblock_1 *sb = st->sb; | |
424 | int i; | |
425 | unsigned long long sb_offset; | |
426 | char *nm; | |
427 | char *c=map_num(pers, __le32_to_cpu(sb->level)); | |
428 | ||
429 | nm = strchr(sb->set_name, ':'); | |
430 | if (nm) | |
431 | nm++; | |
432 | else if (sb->set_name[0]) | |
433 | nm = sb->set_name; | |
434 | else | |
435 | nm = NULL; | |
436 | ||
437 | printf("ARRAY%s%s", nm ? " /dev/md/":"", nm); | |
438 | if (verbose && c) | |
439 | printf(" level=%s", c); | |
440 | sb_offset = __le64_to_cpu(sb->super_offset); | |
441 | if (sb_offset <= 4) | |
442 | printf(" metadata=1.1 "); | |
443 | else if (sb_offset <= 8) | |
444 | printf(" metadata=1.2 "); | |
445 | else | |
446 | printf(" metadata=1.0 "); | |
447 | if (verbose) | |
448 | printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks)); | |
449 | printf("UUID="); | |
450 | for (i=0; i<16; i++) { | |
451 | if ((i&3)==0 && i != 0) printf(":"); | |
452 | printf("%02x", sb->set_uuid[i]); | |
453 | } | |
454 | if (sb->set_name[0]) | |
455 | printf(" name=%.32s", sb->set_name); | |
456 | printf("\n"); | |
457 | } | |
458 | ||
459 | static void export_examine_super1(struct supertype *st) | |
460 | { | |
461 | struct mdp_superblock_1 *sb = st->sb; | |
462 | int i; | |
463 | int len = 32; | |
464 | ||
465 | printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level))); | |
466 | printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks)); | |
467 | for (i=0; i<32; i++) | |
468 | if (sb->set_name[i] == '\n' || | |
469 | sb->set_name[i] == '\0') { | |
470 | len = i; | |
471 | break; | |
472 | } | |
473 | if (len) | |
474 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
475 | printf("MD_UUID="); | |
476 | for (i=0; i<16; i++) { | |
477 | if ((i&3)==0 && i != 0) printf(":"); | |
478 | printf("%02x", sb->set_uuid[i]); | |
479 | } | |
480 | printf("\n"); | |
481 | printf("MD_UPDATE_TIME=%llu\n", | |
482 | __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL); | |
483 | printf("MD_DEV_UUID="); | |
484 | for (i=0; i<16; i++) { | |
485 | if ((i&3)==0 && i != 0) printf(":"); | |
486 | printf("%02x", sb->device_uuid[i]); | |
487 | } | |
488 | printf("\n"); | |
489 | printf("MD_EVENTS=%llu\n", | |
490 | (unsigned long long)__le64_to_cpu(sb->events)); | |
491 | } | |
492 | ||
493 | static void detail_super1(struct supertype *st, char *homehost) | |
494 | { | |
495 | struct mdp_superblock_1 *sb = st->sb; | |
496 | int i; | |
497 | int l = homehost ? strlen(homehost) : 0; | |
498 | ||
499 | printf(" Name : %.32s", sb->set_name); | |
500 | if (l > 0 && l < 32 && | |
501 | sb->set_name[l] == ':' && | |
502 | strncmp(sb->set_name, homehost, l) == 0) | |
503 | printf(" (local to host %s)", homehost); | |
504 | printf("\n UUID : "); | |
505 | for (i=0; i<16; i++) { | |
506 | if ((i&3)==0 && i != 0) printf(":"); | |
507 | printf("%02x", sb->set_uuid[i]); | |
508 | } | |
509 | printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); | |
510 | } | |
511 | ||
512 | static void brief_detail_super1(struct supertype *st) | |
513 | { | |
514 | struct mdp_superblock_1 *sb = st->sb; | |
515 | int i; | |
516 | ||
517 | if (sb->set_name[0]) | |
518 | printf(" name=%.32s", sb->set_name); | |
519 | printf(" UUID="); | |
520 | for (i=0; i<16; i++) { | |
521 | if ((i&3)==0 && i != 0) printf(":"); | |
522 | printf("%02x", sb->set_uuid[i]); | |
523 | } | |
524 | } | |
525 | ||
526 | static void export_detail_super1(struct supertype *st) | |
527 | { | |
528 | struct mdp_superblock_1 *sb = st->sb; | |
529 | int i; | |
530 | int len = 32; | |
531 | ||
532 | for (i=0; i<32; i++) | |
533 | if (sb->set_name[i] == '\n' || | |
534 | sb->set_name[i] == '\0') { | |
535 | len = i; | |
536 | break; | |
537 | } | |
538 | if (len) | |
539 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
540 | } | |
541 | ||
542 | #endif | |
543 | ||
544 | static int match_home1(struct supertype *st, char *homehost) | |
545 | { | |
546 | struct mdp_superblock_1 *sb = st->sb; | |
547 | int l = homehost ? strlen(homehost) : 0; | |
548 | ||
549 | return (l > 0 && l < 32 && | |
550 | sb->set_name[l] == ':' && | |
551 | strncmp(sb->set_name, homehost, l) == 0); | |
552 | } | |
553 | ||
554 | static void uuid_from_super1(struct supertype *st, int uuid[4]) | |
555 | { | |
556 | struct mdp_superblock_1 *super = st->sb; | |
557 | char *cuuid = (char*)uuid; | |
558 | int i; | |
559 | for (i=0; i<16; i++) | |
560 | cuuid[i] = super->set_uuid[i]; | |
561 | } | |
562 | ||
563 | static void getinfo_super1(struct supertype *st, struct mdinfo *info, char *map) | |
564 | { | |
565 | struct mdp_superblock_1 *sb = st->sb; | |
566 | int working = 0; | |
567 | unsigned int i; | |
568 | unsigned int role; | |
569 | unsigned int map_disks = info->array.raid_disks; | |
570 | ||
571 | memset(info, 0, sizeof(*info)); | |
572 | info->array.major_version = 1; | |
573 | info->array.minor_version = st->minor_version; | |
574 | info->array.patch_version = 0; | |
575 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
576 | info->array.level = __le32_to_cpu(sb->level); | |
577 | info->array.layout = __le32_to_cpu(sb->layout); | |
578 | info->array.md_minor = -1; | |
579 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
580 | info->array.utime = __le64_to_cpu(sb->utime); | |
581 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; | |
582 | info->array.state = | |
583 | (__le64_to_cpu(sb->resync_offset) == MaxSector) | |
584 | ? 1 : 0; | |
585 | ||
586 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
587 | info->component_size = __le64_to_cpu(sb->size); | |
588 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) | |
589 | info->bitmap_offset = __le32_to_cpu(sb->bitmap_offset); | |
590 | ||
591 | info->disk.major = 0; | |
592 | info->disk.minor = 0; | |
593 | info->disk.number = __le32_to_cpu(sb->dev_number); | |
594 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || | |
595 | __le32_to_cpu(sb->max_dev) > 512) | |
596 | role = 0xfffe; | |
597 | else | |
598 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
599 | ||
600 | info->disk.raid_disk = -1; | |
601 | switch(role) { | |
602 | case 0xFFFF: | |
603 | info->disk.state = 0; /* spare: not active, not sync, not faulty */ | |
604 | break; | |
605 | case 0xFFFE: | |
606 | info->disk.state = 1; /* faulty */ | |
607 | break; | |
608 | default: | |
609 | info->disk.state = 6; /* active and in sync */ | |
610 | info->disk.raid_disk = role; | |
611 | } | |
612 | if (sb->devflags & WriteMostly1) | |
613 | info->disk.state |= (1 << MD_DISK_WRITEMOSTLY); | |
614 | info->events = __le64_to_cpu(sb->events); | |
615 | sprintf(info->text_version, "1.%d", st->minor_version); | |
616 | info->safe_mode_delay = 200; | |
617 | ||
618 | memcpy(info->uuid, sb->set_uuid, 16); | |
619 | ||
620 | strncpy(info->name, sb->set_name, 32); | |
621 | info->name[32] = 0; | |
622 | ||
623 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET)) | |
624 | info->recovery_start = __le32_to_cpu(sb->recovery_offset); | |
625 | else | |
626 | info->recovery_start = MaxSector; | |
627 | ||
628 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
629 | info->reshape_active = 1; | |
630 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
631 | info->new_level = __le32_to_cpu(sb->new_level); | |
632 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
633 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
634 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; | |
635 | if (info->delta_disks < 0) | |
636 | info->array.raid_disks -= info->delta_disks; | |
637 | } else | |
638 | info->reshape_active = 0; | |
639 | ||
640 | info->recovery_blocked = info->reshape_active; | |
641 | ||
642 | if (map) | |
643 | for (i=0; i<map_disks; i++) | |
644 | map[i] = 0; | |
645 | for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) { | |
646 | role = __le16_to_cpu(sb->dev_roles[i]); | |
647 | if (/*role == 0xFFFF || */role < (unsigned) info->array.raid_disks) { | |
648 | working++; | |
649 | if (map && role < map_disks) | |
650 | map[role] = 1; | |
651 | } | |
652 | } | |
653 | ||
654 | info->array.working_disks = working; | |
655 | } | |
656 | ||
657 | static struct mdinfo *container_content1(struct supertype *st, char *subarray) | |
658 | { | |
659 | struct mdinfo *info; | |
660 | ||
661 | if (subarray) | |
662 | return NULL; | |
663 | ||
664 | info = malloc(sizeof(*info)); | |
665 | getinfo_super1(st, info, NULL); | |
666 | return info; | |
667 | } | |
668 | ||
669 | static int update_super1(struct supertype *st, struct mdinfo *info, | |
670 | char *update, | |
671 | char *devname, int verbose, | |
672 | int uuid_set, char *homehost) | |
673 | { | |
674 | /* NOTE: for 'assemble' and 'force' we need to return non-zero | |
675 | * if any change was made. For others, the return value is | |
676 | * ignored. | |
677 | */ | |
678 | int rv = 0; | |
679 | struct mdp_superblock_1 *sb = st->sb; | |
680 | ||
681 | if (strcmp(update, "force-one")==0) { | |
682 | /* Not enough devices for a working array, | |
683 | * so bring this one up-to-date | |
684 | */ | |
685 | if (sb->events != __cpu_to_le64(info->events)) | |
686 | rv = 1; | |
687 | sb->events = __cpu_to_le64(info->events); | |
688 | } else if (strcmp(update, "force-array")==0) { | |
689 | /* Degraded array and 'force' requests to | |
690 | * maybe need to mark it 'clean'. | |
691 | */ | |
692 | switch(__le32_to_cpu(sb->level)) { | |
693 | case 5: case 4: case 6: | |
694 | /* need to force clean */ | |
695 | if (sb->resync_offset != MaxSector) | |
696 | rv = 1; | |
697 | sb->resync_offset = MaxSector; | |
698 | } | |
699 | } else if (strcmp(update, "assemble")==0) { | |
700 | int d = info->disk.number; | |
701 | int want; | |
702 | if (info->disk.state == 6) | |
703 | want = info->disk.raid_disk; | |
704 | else | |
705 | want = 0xFFFF; | |
706 | if (sb->dev_roles[d] != __cpu_to_le16(want)) { | |
707 | sb->dev_roles[d] = __cpu_to_le16(want); | |
708 | rv = 1; | |
709 | } | |
710 | if (info->reshape_active && | |
711 | sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) && | |
712 | info->delta_disks >= 0 && | |
713 | info->reshape_progress < __le64_to_cpu(sb->reshape_position)) { | |
714 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
715 | rv = 1; | |
716 | } | |
717 | if (info->reshape_active && | |
718 | sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) && | |
719 | info->delta_disks < 0 && | |
720 | info->reshape_progress > __le64_to_cpu(sb->reshape_position)) { | |
721 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
722 | rv = 1; | |
723 | } | |
724 | } else if (strcmp(update, "linear-grow-new") == 0) { | |
725 | unsigned int i; | |
726 | int rfd, fd; | |
727 | unsigned int max = __le32_to_cpu(sb->max_dev); | |
728 | ||
729 | for (i=0 ; i < max ; i++) | |
730 | if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe) | |
731 | break; | |
732 | sb->dev_number = __cpu_to_le32(i); | |
733 | info->disk.number = i; | |
734 | if (max >= __le32_to_cpu(sb->max_dev)) | |
735 | sb->max_dev = __cpu_to_le32(max+1); | |
736 | ||
737 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
738 | read(rfd, sb->device_uuid, 16) != 16) { | |
739 | __u32 r[4] = {random(), random(), random(), random()}; | |
740 | memcpy(sb->device_uuid, r, 16); | |
741 | } | |
742 | if (rfd >= 0) | |
743 | close(rfd); | |
744 | ||
745 | sb->dev_roles[i] = | |
746 | __cpu_to_le16(info->disk.raid_disk); | |
747 | ||
748 | fd = open(devname, O_RDONLY); | |
749 | if (fd >= 0) { | |
750 | unsigned long long ds; | |
751 | get_dev_size(fd, devname, &ds); | |
752 | close(fd); | |
753 | ds >>= 9; | |
754 | if (__le64_to_cpu(sb->super_offset) < | |
755 | __le64_to_cpu(sb->data_offset)) { | |
756 | sb->data_size = __cpu_to_le64( | |
757 | ds - __le64_to_cpu(sb->data_offset)); | |
758 | } else { | |
759 | ds -= 8*2; | |
760 | ds &= ~(unsigned long long)(4*2-1); | |
761 | sb->super_offset = __cpu_to_le64(ds); | |
762 | sb->data_size = __cpu_to_le64( | |
763 | ds - __le64_to_cpu(sb->data_offset)); | |
764 | } | |
765 | } | |
766 | } else if (strcmp(update, "linear-grow-update") == 0) { | |
767 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
768 | sb->dev_roles[info->disk.number] = | |
769 | __cpu_to_le16(info->disk.raid_disk); | |
770 | } else if (strcmp(update, "resync") == 0) { | |
771 | /* make sure resync happens */ | |
772 | sb->resync_offset = 0ULL; | |
773 | } else if (strcmp(update, "uuid") == 0) { | |
774 | copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid); | |
775 | ||
776 | if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
777 | struct bitmap_super_s *bm; | |
778 | bm = (struct bitmap_super_s*)(st->sb+1024); | |
779 | memcpy(bm->uuid, sb->set_uuid, 16); | |
780 | } | |
781 | } else if (strcmp(update, "no-bitmap") == 0) { | |
782 | sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); | |
783 | } else if (strcmp(update, "homehost") == 0 && | |
784 | homehost) { | |
785 | char *c; | |
786 | update = "name"; | |
787 | c = strchr(sb->set_name, ':'); | |
788 | if (c) | |
789 | strncpy(info->name, c+1, 31 - (c-sb->set_name)); | |
790 | else | |
791 | strncpy(info->name, sb->set_name, 32); | |
792 | info->name[32] = 0; | |
793 | } else if (strcmp(update, "name") == 0) { | |
794 | if (info->name[0] == 0) | |
795 | sprintf(info->name, "%d", info->array.md_minor); | |
796 | memset(sb->set_name, 0, sizeof(sb->set_name)); | |
797 | if (homehost && | |
798 | strchr(info->name, ':') == NULL && | |
799 | strlen(homehost)+1+strlen(info->name) < 32) { | |
800 | strcpy(sb->set_name, homehost); | |
801 | strcat(sb->set_name, ":"); | |
802 | strcat(sb->set_name, info->name); | |
803 | } else | |
804 | strcpy(sb->set_name, info->name); | |
805 | } else if (strcmp(update, "devicesize") == 0 && | |
806 | __le64_to_cpu(sb->super_offset) < | |
807 | __le64_to_cpu(sb->data_offset)) { | |
808 | /* set data_size to device size less data_offset */ | |
809 | struct misc_dev_info *misc = (struct misc_dev_info*) | |
810 | (st->sb + 1024 + 512); | |
811 | printf("Size was %llu\n", (unsigned long long) | |
812 | __le64_to_cpu(sb->data_size)); | |
813 | sb->data_size = __cpu_to_le64( | |
814 | misc->device_size - __le64_to_cpu(sb->data_offset)); | |
815 | printf("Size is %llu\n", (unsigned long long) | |
816 | __le64_to_cpu(sb->data_size)); | |
817 | } else if (strcmp(update, "_reshape_progress")==0) | |
818 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
819 | else if (strcmp(update, "writemostly")==0) | |
820 | sb->devflags |= WriteMostly1; | |
821 | else if (strcmp(update, "readwrite")==0) | |
822 | sb->devflags &= ~WriteMostly1; | |
823 | else | |
824 | rv = -1; | |
825 | ||
826 | sb->sb_csum = calc_sb_1_csum(sb); | |
827 | return rv; | |
828 | } | |
829 | ||
830 | static int init_super1(struct supertype *st, mdu_array_info_t *info, | |
831 | unsigned long long size, char *name, char *homehost, int *uuid) | |
832 | { | |
833 | struct mdp_superblock_1 *sb; | |
834 | int spares; | |
835 | int rfd; | |
836 | char defname[10]; | |
837 | ||
838 | if (posix_memalign((void**)&sb, 512, (1024 + 512 + | |
839 | sizeof(struct misc_dev_info))) != 0) { | |
840 | fprintf(stderr, Name | |
841 | ": %s could not allocate superblock\n", __func__); | |
842 | return 0; | |
843 | } | |
844 | memset(sb, 0, 1024); | |
845 | ||
846 | st->sb = sb; | |
847 | if (info == NULL) { | |
848 | /* zeroing superblock */ | |
849 | return 0; | |
850 | } | |
851 | ||
852 | spares = info->working_disks - info->active_disks; | |
853 | if (info->raid_disks + spares > 384) { | |
854 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
855 | info->raid_disks , spares, 384); | |
856 | return 0; | |
857 | } | |
858 | ||
859 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
860 | sb->major_version = __cpu_to_le32(1); | |
861 | sb->feature_map = 0; | |
862 | sb->pad0 = 0; | |
863 | ||
864 | if (uuid) | |
865 | copy_uuid(sb->set_uuid, uuid, super1.swapuuid); | |
866 | else { | |
867 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
868 | read(rfd, sb->set_uuid, 16) != 16) { | |
869 | __u32 r[4] = {random(), random(), random(), random()}; | |
870 | memcpy(sb->set_uuid, r, 16); | |
871 | } | |
872 | if (rfd >= 0) close(rfd); | |
873 | } | |
874 | ||
875 | if (name == NULL || *name == 0) { | |
876 | sprintf(defname, "%d", info->md_minor); | |
877 | name = defname; | |
878 | } | |
879 | memset(sb->set_name, 0, 32); | |
880 | if (homehost && | |
881 | strchr(name, ':')== NULL && | |
882 | strlen(homehost)+1+strlen(name) < 32) { | |
883 | strcpy(sb->set_name, homehost); | |
884 | strcat(sb->set_name, ":"); | |
885 | strcat(sb->set_name, name); | |
886 | } else | |
887 | strcpy(sb->set_name, name); | |
888 | ||
889 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
890 | sb->level = __cpu_to_le32(info->level); | |
891 | sb->layout = __cpu_to_le32(info->layout); | |
892 | sb->size = __cpu_to_le64(size*2ULL); | |
893 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
894 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
895 | ||
896 | sb->data_offset = __cpu_to_le64(0); | |
897 | sb->data_size = __cpu_to_le64(0); | |
898 | sb->super_offset = __cpu_to_le64(0); | |
899 | sb->recovery_offset = __cpu_to_le64(0); | |
900 | ||
901 | sb->utime = sb->ctime; | |
902 | sb->events = __cpu_to_le64(1); | |
903 | if (info->state & (1<<MD_SB_CLEAN)) | |
904 | sb->resync_offset = MaxSector; | |
905 | else | |
906 | sb->resync_offset = 0; | |
907 | sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ | |
908 | sizeof(sb->dev_roles[0])); | |
909 | memset(sb->pad3, 0, sizeof(sb->pad3)); | |
910 | ||
911 | memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); | |
912 | ||
913 | return 1; | |
914 | } | |
915 | ||
916 | struct devinfo { | |
917 | int fd; | |
918 | char *devname; | |
919 | mdu_disk_info_t disk; | |
920 | struct devinfo *next; | |
921 | }; | |
922 | #ifndef MDASSEMBLE | |
923 | /* Add a device to the superblock being created */ | |
924 | static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk, | |
925 | int fd, char *devname) | |
926 | { | |
927 | struct mdp_superblock_1 *sb = st->sb; | |
928 | __u16 *rp = sb->dev_roles + dk->number; | |
929 | struct devinfo *di, **dip; | |
930 | ||
931 | if ((dk->state & 6) == 6) /* active, sync */ | |
932 | *rp = __cpu_to_le16(dk->raid_disk); | |
933 | else if ((dk->state & ~2) == 0) /* active or idle -> spare */ | |
934 | *rp = 0xffff; | |
935 | else | |
936 | *rp = 0xfffe; | |
937 | ||
938 | if (dk->number >= (int)__le32_to_cpu(sb->max_dev) && | |
939 | __le32_to_cpu(sb->max_dev) < 384) | |
940 | sb->max_dev = __cpu_to_le32(dk->number+1); | |
941 | ||
942 | sb->dev_number = __cpu_to_le32(dk->number); | |
943 | sb->devflags = 0; /* don't copy another disks flags */ | |
944 | sb->sb_csum = calc_sb_1_csum(sb); | |
945 | ||
946 | dip = (struct devinfo **)&st->info; | |
947 | while (*dip) | |
948 | dip = &(*dip)->next; | |
949 | di = malloc(sizeof(struct devinfo)); | |
950 | di->fd = fd; | |
951 | di->devname = devname; | |
952 | di->disk = *dk; | |
953 | di->next = NULL; | |
954 | *dip = di; | |
955 | ||
956 | return 0; | |
957 | } | |
958 | #endif | |
959 | ||
960 | static void locate_bitmap1(struct supertype *st, int fd); | |
961 | ||
962 | static int store_super1(struct supertype *st, int fd) | |
963 | { | |
964 | struct mdp_superblock_1 *sb = st->sb; | |
965 | unsigned long long sb_offset; | |
966 | int sbsize; | |
967 | unsigned long long dsize; | |
968 | ||
969 | if (!get_dev_size(fd, NULL, &dsize)) | |
970 | return 1; | |
971 | ||
972 | dsize >>= 9; | |
973 | ||
974 | if (dsize < 24) | |
975 | return 2; | |
976 | ||
977 | /* | |
978 | * Calculate the position of the superblock. | |
979 | * It is always aligned to a 4K boundary and | |
980 | * depending on minor_version, it can be: | |
981 | * 0: At least 8K, but less than 12K, from end of device | |
982 | * 1: At start of device | |
983 | * 2: 4K from start of device. | |
984 | */ | |
985 | switch(st->minor_version) { | |
986 | case 0: | |
987 | sb_offset = dsize; | |
988 | sb_offset -= 8*2; | |
989 | sb_offset &= ~(4*2-1); | |
990 | break; | |
991 | case 1: | |
992 | sb_offset = 0; | |
993 | break; | |
994 | case 2: | |
995 | sb_offset = 4*2; | |
996 | break; | |
997 | default: | |
998 | return -EINVAL; | |
999 | } | |
1000 | ||
1001 | ||
1002 | ||
1003 | if (sb_offset != __le64_to_cpu(sb->super_offset) && | |
1004 | 0 != __le64_to_cpu(sb->super_offset) | |
1005 | ) { | |
1006 | fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); | |
1007 | abort(); | |
1008 | } | |
1009 | ||
1010 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) | |
1011 | return 3; | |
1012 | ||
1013 | sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); | |
1014 | sbsize = (sbsize+511)&(~511UL); | |
1015 | ||
1016 | if (awrite(fd, sb, sbsize) != sbsize) | |
1017 | return 4; | |
1018 | ||
1019 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
1020 | struct bitmap_super_s *bm = (struct bitmap_super_s*) | |
1021 | (((char*)sb)+1024); | |
1022 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { | |
1023 | locate_bitmap1(st, fd); | |
1024 | if (awrite(fd, bm, sizeof(*bm)) != | |
1025 | sizeof(*bm)) | |
1026 | return 5; | |
1027 | } | |
1028 | } | |
1029 | fsync(fd); | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | static int load_super1(struct supertype *st, int fd, char *devname); | |
1034 | ||
1035 | static unsigned long choose_bm_space(unsigned long devsize) | |
1036 | { | |
1037 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, | |
1038 | * if bigger than 200Gig, save 128k | |
1039 | * NOTE: result must be multiple of 4K else bad things happen | |
1040 | * on 4K-sector devices. | |
1041 | */ | |
1042 | if (devsize < 64*2) return 0; | |
1043 | if (devsize - 64*2 >= 200*1024*1024*2) | |
1044 | return 128*2; | |
1045 | if (devsize - 4*2 > 8*1024*1024*2) | |
1046 | return 64*2; | |
1047 | return 4*2; | |
1048 | } | |
1049 | ||
1050 | static void free_super1(struct supertype *st); | |
1051 | ||
1052 | #ifndef MDASSEMBLE | |
1053 | static int write_init_super1(struct supertype *st) | |
1054 | { | |
1055 | struct mdp_superblock_1 *sb = st->sb; | |
1056 | struct supertype *refst; | |
1057 | int rfd; | |
1058 | int rv = 0; | |
1059 | unsigned long long bm_space; | |
1060 | unsigned long long reserved; | |
1061 | struct devinfo *di; | |
1062 | unsigned long long dsize, array_size; | |
1063 | unsigned long long sb_offset; | |
1064 | ||
1065 | for (di = st->info; di && ! rv ; di = di->next) { | |
1066 | if (di->disk.state == 1) | |
1067 | continue; | |
1068 | if (di->fd < 0) | |
1069 | continue; | |
1070 | ||
1071 | while (Kill(di->devname, NULL, 0, 1, 1) == 0) | |
1072 | ; | |
1073 | ||
1074 | sb->dev_number = __cpu_to_le32(di->disk.number); | |
1075 | if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY)) | |
1076 | sb->devflags |= WriteMostly1; | |
1077 | else | |
1078 | sb->devflags &= ~WriteMostly1; | |
1079 | ||
1080 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
1081 | read(rfd, sb->device_uuid, 16) != 16) { | |
1082 | __u32 r[4] = {random(), random(), random(), random()}; | |
1083 | memcpy(sb->device_uuid, r, 16); | |
1084 | } | |
1085 | if (rfd >= 0) | |
1086 | close(rfd); | |
1087 | ||
1088 | sb->events = 0; | |
1089 | ||
1090 | refst = dup_super(st); | |
1091 | if (load_super1(refst, di->fd, NULL)==0) { | |
1092 | struct mdp_superblock_1 *refsb = refst->sb; | |
1093 | ||
1094 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
1095 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
1096 | /* same array, so preserve events and | |
1097 | * dev_number */ | |
1098 | sb->events = refsb->events; | |
1099 | /* bugs in 2.6.17 and earlier mean the | |
1100 | * dev_number chosen in Manage must be preserved | |
1101 | */ | |
1102 | if (get_linux_version() >= 2006018) | |
1103 | sb->dev_number = refsb->dev_number; | |
1104 | } | |
1105 | free_super1(refst); | |
1106 | } | |
1107 | free(refst); | |
1108 | ||
1109 | if (!get_dev_size(di->fd, NULL, &dsize)) { | |
1110 | rv = 1; | |
1111 | goto error_out; | |
1112 | } | |
1113 | dsize >>= 9; | |
1114 | ||
1115 | if (dsize < 24) { | |
1116 | close(di->fd); | |
1117 | rv = 2; | |
1118 | goto error_out; | |
1119 | } | |
1120 | ||
1121 | ||
1122 | /* | |
1123 | * Calculate the position of the superblock. | |
1124 | * It is always aligned to a 4K boundary and | |
1125 | * depending on minor_version, it can be: | |
1126 | * 0: At least 8K, but less than 12K, from end of device | |
1127 | * 1: At start of device | |
1128 | * 2: 4K from start of device. | |
1129 | * Depending on the array size, we might leave extra space | |
1130 | * for a bitmap. | |
1131 | */ | |
1132 | array_size = __le64_to_cpu(sb->size); | |
1133 | /* work out how much space we left for a bitmap */ | |
1134 | bm_space = choose_bm_space(array_size); | |
1135 | ||
1136 | switch(st->minor_version) { | |
1137 | case 0: | |
1138 | sb_offset = dsize; | |
1139 | sb_offset -= 8*2; | |
1140 | sb_offset &= ~(4*2-1); | |
1141 | sb->super_offset = __cpu_to_le64(sb_offset); | |
1142 | sb->data_offset = __cpu_to_le64(0); | |
1143 | if (sb_offset < array_size + bm_space) | |
1144 | bm_space = sb_offset - array_size; | |
1145 | sb->data_size = __cpu_to_le64(sb_offset - bm_space); | |
1146 | break; | |
1147 | case 1: | |
1148 | sb->super_offset = __cpu_to_le64(0); | |
1149 | reserved = bm_space + 4*2; | |
1150 | /* Try for multiple of 1Meg so it is nicely aligned */ | |
1151 | #define ONE_MEG (2*1024) | |
1152 | reserved = ((reserved + ONE_MEG-1)/ONE_MEG) * ONE_MEG; | |
1153 | if (reserved + __le64_to_cpu(sb->size) > dsize) | |
1154 | reserved = dsize - __le64_to_cpu(sb->size); | |
1155 | /* force 4K alignment */ | |
1156 | reserved &= ~7ULL; | |
1157 | ||
1158 | sb->data_offset = __cpu_to_le64(reserved); | |
1159 | sb->data_size = __cpu_to_le64(dsize - reserved); | |
1160 | break; | |
1161 | case 2: | |
1162 | sb_offset = 4*2; | |
1163 | sb->super_offset = __cpu_to_le64(4*2); | |
1164 | if (4*2 + 4*2 + bm_space + __le64_to_cpu(sb->size) | |
1165 | > dsize) | |
1166 | bm_space = dsize - __le64_to_cpu(sb->size) | |
1167 | - 4*2 - 4*2; | |
1168 | ||
1169 | reserved = bm_space + 4*2 + 4*2; | |
1170 | /* Try for multiple of 1Meg so it is nicely aligned */ | |
1171 | #define ONE_MEG (2*1024) | |
1172 | reserved = ((reserved + ONE_MEG-1)/ONE_MEG) * ONE_MEG; | |
1173 | if (reserved + __le64_to_cpu(sb->size) > dsize) | |
1174 | reserved = dsize - __le64_to_cpu(sb->size); | |
1175 | /* force 4K alignment */ | |
1176 | reserved &= ~7ULL; | |
1177 | ||
1178 | sb->data_offset = __cpu_to_le64(reserved); | |
1179 | sb->data_size = __cpu_to_le64(dsize - reserved); | |
1180 | break; | |
1181 | default: | |
1182 | fprintf(stderr, Name ": Failed to write invalid " | |
1183 | "metadata format 1.%i to %s\n", | |
1184 | st->minor_version, di->devname); | |
1185 | rv = -EINVAL; | |
1186 | goto out; | |
1187 | } | |
1188 | ||
1189 | ||
1190 | sb->sb_csum = calc_sb_1_csum(sb); | |
1191 | rv = store_super1(st, di->fd); | |
1192 | if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) | |
1193 | rv = st->ss->write_bitmap(st, di->fd); | |
1194 | close(di->fd); | |
1195 | di->fd = -1; | |
1196 | } | |
1197 | error_out: | |
1198 | if (rv) | |
1199 | fprintf(stderr, Name ": Failed to write metadata to %s\n", | |
1200 | di->devname); | |
1201 | out: | |
1202 | return rv; | |
1203 | } | |
1204 | #endif | |
1205 | ||
1206 | static int compare_super1(struct supertype *st, struct supertype *tst) | |
1207 | { | |
1208 | /* | |
1209 | * return: | |
1210 | * 0 same, or first was empty, and second was copied | |
1211 | * 1 second had wrong number | |
1212 | * 2 wrong uuid | |
1213 | * 3 wrong other info | |
1214 | */ | |
1215 | struct mdp_superblock_1 *first = st->sb; | |
1216 | struct mdp_superblock_1 *second = tst->sb; | |
1217 | ||
1218 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
1219 | return 1; | |
1220 | if (second->major_version != __cpu_to_le32(1)) | |
1221 | return 1; | |
1222 | ||
1223 | if (!first) { | |
1224 | if (posix_memalign((void**)&first, 512, | |
1225 | 1024 + 512 + | |
1226 | sizeof(struct misc_dev_info)) != 0) { | |
1227 | fprintf(stderr, Name | |
1228 | ": %s could not allocate superblock\n", __func__); | |
1229 | return 1; | |
1230 | } | |
1231 | memcpy(first, second, 1024 + 512 + | |
1232 | sizeof(struct misc_dev_info)); | |
1233 | st->sb = first; | |
1234 | return 0; | |
1235 | } | |
1236 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
1237 | return 2; | |
1238 | ||
1239 | if (first->ctime != second->ctime || | |
1240 | first->level != second->level || | |
1241 | first->layout != second->layout || | |
1242 | first->size != second->size || | |
1243 | first->chunksize != second->chunksize || | |
1244 | first->raid_disks != second->raid_disks) | |
1245 | return 3; | |
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | static int load_super1(struct supertype *st, int fd, char *devname) | |
1250 | { | |
1251 | unsigned long long dsize; | |
1252 | unsigned long long sb_offset; | |
1253 | struct mdp_superblock_1 *super; | |
1254 | int uuid[4]; | |
1255 | struct bitmap_super_s *bsb; | |
1256 | struct misc_dev_info *misc; | |
1257 | ||
1258 | free_super1(st); | |
1259 | ||
1260 | if (st->ss == NULL || st->minor_version == -1) { | |
1261 | int bestvers = -1; | |
1262 | struct supertype tst; | |
1263 | __u64 bestctime = 0; | |
1264 | /* guess... choose latest ctime */ | |
1265 | memset(&tst, 0, sizeof(tst)); | |
1266 | tst.ss = &super1; | |
1267 | for (tst.minor_version = 0; tst.minor_version <= 2 ; tst.minor_version++) { | |
1268 | switch(load_super1(&tst, fd, devname)) { | |
1269 | case 0: super = tst.sb; | |
1270 | if (bestvers == -1 || | |
1271 | bestctime < __le64_to_cpu(super->ctime)) { | |
1272 | bestvers = tst.minor_version; | |
1273 | bestctime = __le64_to_cpu(super->ctime); | |
1274 | } | |
1275 | free(super); | |
1276 | tst.sb = NULL; | |
1277 | break; | |
1278 | case 1: return 1; /*bad device */ | |
1279 | case 2: break; /* bad, try next */ | |
1280 | } | |
1281 | } | |
1282 | if (bestvers != -1) { | |
1283 | int rv; | |
1284 | tst.minor_version = bestvers; | |
1285 | tst.ss = &super1; | |
1286 | tst.max_devs = 384; | |
1287 | rv = load_super1(&tst, fd, devname); | |
1288 | if (rv == 0) | |
1289 | *st = tst; | |
1290 | return rv; | |
1291 | } | |
1292 | return 2; | |
1293 | } | |
1294 | if (!get_dev_size(fd, devname, &dsize)) | |
1295 | return 1; | |
1296 | dsize >>= 9; | |
1297 | ||
1298 | if (dsize < 24) { | |
1299 | if (devname) | |
1300 | fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", | |
1301 | devname, dsize); | |
1302 | return 1; | |
1303 | } | |
1304 | ||
1305 | /* | |
1306 | * Calculate the position of the superblock. | |
1307 | * It is always aligned to a 4K boundary and | |
1308 | * depending on minor_version, it can be: | |
1309 | * 0: At least 8K, but less than 12K, from end of device | |
1310 | * 1: At start of device | |
1311 | * 2: 4K from start of device. | |
1312 | */ | |
1313 | switch(st->minor_version) { | |
1314 | case 0: | |
1315 | sb_offset = dsize; | |
1316 | sb_offset -= 8*2; | |
1317 | sb_offset &= ~(4*2-1); | |
1318 | break; | |
1319 | case 1: | |
1320 | sb_offset = 0; | |
1321 | break; | |
1322 | case 2: | |
1323 | sb_offset = 4*2; | |
1324 | break; | |
1325 | default: | |
1326 | return -EINVAL; | |
1327 | } | |
1328 | ||
1329 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
1330 | ||
1331 | ||
1332 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
1333 | if (devname) | |
1334 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
1335 | devname, strerror(errno)); | |
1336 | return 1; | |
1337 | } | |
1338 | ||
1339 | if (posix_memalign((void**)&super, 512, | |
1340 | 1024 + 512 + | |
1341 | sizeof(struct misc_dev_info)) != 0) { | |
1342 | fprintf(stderr, Name ": %s could not allocate superblock\n", | |
1343 | __func__); | |
1344 | return 1; | |
1345 | } | |
1346 | ||
1347 | if (aread(fd, super, 1024) != 1024) { | |
1348 | if (devname) | |
1349 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
1350 | devname); | |
1351 | free(super); | |
1352 | return 1; | |
1353 | } | |
1354 | ||
1355 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
1356 | if (devname) | |
1357 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
1358 | devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); | |
1359 | free(super); | |
1360 | return 2; | |
1361 | } | |
1362 | ||
1363 | if (__le32_to_cpu(super->major_version) != 1) { | |
1364 | if (devname) | |
1365 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
1366 | devname, __le32_to_cpu(super->major_version)); | |
1367 | free(super); | |
1368 | return 2; | |
1369 | } | |
1370 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
1371 | if (devname) | |
1372 | fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", | |
1373 | devname); | |
1374 | free(super); | |
1375 | return 2; | |
1376 | } | |
1377 | st->sb = super; | |
1378 | ||
1379 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1380 | ||
1381 | misc = (struct misc_dev_info*) (((char*)super)+1024+512); | |
1382 | misc->device_size = dsize; | |
1383 | ||
1384 | /* Now check on the bitmap superblock */ | |
1385 | if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0) | |
1386 | return 0; | |
1387 | /* Read the bitmap superblock and make sure it looks | |
1388 | * valid. If it doesn't clear the bit. An --assemble --force | |
1389 | * should get that written out. | |
1390 | */ | |
1391 | locate_bitmap1(st, fd); | |
1392 | if (aread(fd, ((char*)super)+1024, 512) | |
1393 | != 512) | |
1394 | goto no_bitmap; | |
1395 | ||
1396 | uuid_from_super1(st, uuid); | |
1397 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
1398 | memcmp(bsb->uuid, uuid, 16) != 0) | |
1399 | goto no_bitmap; | |
1400 | return 0; | |
1401 | ||
1402 | no_bitmap: | |
1403 | super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) | |
1404 | & ~MD_FEATURE_BITMAP_OFFSET); | |
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | ||
1409 | static struct supertype *match_metadata_desc1(char *arg) | |
1410 | { | |
1411 | struct supertype *st = malloc(sizeof(*st)); | |
1412 | if (!st) return st; | |
1413 | ||
1414 | memset(st, 0, sizeof(*st)); | |
1415 | st->container_dev = NoMdDev; | |
1416 | st->ss = &super1; | |
1417 | st->max_devs = 384; | |
1418 | st->sb = NULL; | |
1419 | /* leading zeros can be safely ignored. --detail generates them. */ | |
1420 | while (*arg == '0') | |
1421 | arg++; | |
1422 | if (strcmp(arg, "1.0") == 0 || | |
1423 | strcmp(arg, "1.00") == 0) { | |
1424 | st->minor_version = 0; | |
1425 | return st; | |
1426 | } | |
1427 | if (strcmp(arg, "1.1") == 0 || | |
1428 | strcmp(arg, "1.01") == 0 | |
1429 | ) { | |
1430 | st->minor_version = 1; | |
1431 | return st; | |
1432 | } | |
1433 | if (strcmp(arg, "1.2") == 0 || | |
1434 | #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */ | |
1435 | strcmp(arg, "default") == 0 || | |
1436 | #endif /* DEFAULT_OLD_METADATA */ | |
1437 | strcmp(arg, "1.02") == 0) { | |
1438 | st->minor_version = 2; | |
1439 | return st; | |
1440 | } | |
1441 | if (strcmp(arg, "1") == 0 || | |
1442 | strcmp(arg, "default") == 0) { | |
1443 | st->minor_version = -1; | |
1444 | return st; | |
1445 | } | |
1446 | ||
1447 | free(st); | |
1448 | return NULL; | |
1449 | } | |
1450 | ||
1451 | /* find available size on device with this devsize, using | |
1452 | * superblock type st, and reserving 'reserve' sectors for | |
1453 | * a possible bitmap | |
1454 | */ | |
1455 | static __u64 avail_size1(struct supertype *st, __u64 devsize) | |
1456 | { | |
1457 | struct mdp_superblock_1 *super = st->sb; | |
1458 | if (devsize < 24) | |
1459 | return 0; | |
1460 | ||
1461 | if (super == NULL) | |
1462 | /* creating: allow suitable space for bitmap */ | |
1463 | devsize -= choose_bm_space(devsize); | |
1464 | #ifndef MDASSEMBLE | |
1465 | else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) { | |
1466 | /* hot-add. allow for actual size of bitmap */ | |
1467 | struct bitmap_super_s *bsb; | |
1468 | bsb = (struct bitmap_super_s *)(((char*)super)+1024); | |
1469 | devsize -= bitmap_sectors(bsb); | |
1470 | } | |
1471 | #endif | |
1472 | ||
1473 | if (st->minor_version < 0) | |
1474 | /* not specified, so time to set default */ | |
1475 | st->minor_version = 2; | |
1476 | if (super == NULL && st->minor_version > 0) { | |
1477 | /* haven't committed to a size yet, so allow some | |
1478 | * slack for alignment of data_offset. | |
1479 | * We haven't access to device details so allow | |
1480 | * 1 Meg if bigger than 1Gig | |
1481 | */ | |
1482 | if (devsize > 1024*1024*2) | |
1483 | devsize -= 1024*2; | |
1484 | } | |
1485 | switch(st->minor_version) { | |
1486 | case 0: | |
1487 | /* at end */ | |
1488 | return ((devsize - 8*2 ) & ~(4*2-1)); | |
1489 | case 1: | |
1490 | /* at start, 4K for superblock and possible bitmap */ | |
1491 | return devsize - 4*2; | |
1492 | case 2: | |
1493 | /* 4k from start, 4K for superblock and possible bitmap */ | |
1494 | return devsize - (4+4)*2; | |
1495 | } | |
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | static int | |
1500 | add_internal_bitmap1(struct supertype *st, | |
1501 | int *chunkp, int delay, int write_behind, | |
1502 | unsigned long long size, | |
1503 | int may_change, int major) | |
1504 | { | |
1505 | /* | |
1506 | * If not may_change, then this is a 'Grow' without sysfs support for | |
1507 | * bitmaps, and the bitmap must fit after the superblock at 1K offset. | |
1508 | * If may_change, then this is create or a Grow with sysfs syupport, | |
1509 | * and we can put the bitmap wherever we like. | |
1510 | * | |
1511 | * size is in sectors, chunk is in bytes !!! | |
1512 | */ | |
1513 | ||
1514 | unsigned long long bits; | |
1515 | unsigned long long max_bits; | |
1516 | unsigned long long min_chunk; | |
1517 | long offset; | |
1518 | unsigned long long chunk = *chunkp; | |
1519 | int room = 0; | |
1520 | int creating = 0; | |
1521 | struct mdp_superblock_1 *sb = st->sb; | |
1522 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); | |
1523 | int uuid[4]; | |
1524 | ||
1525 | if (__le64_to_cpu(sb->data_size) == 0) | |
1526 | /* Must be creating the array, else data_size would be non-zero */ | |
1527 | creating = 1; | |
1528 | switch(st->minor_version) { | |
1529 | case 0: | |
1530 | /* either 3K after the superblock (when hot-add), | |
1531 | * or some amount of space before. | |
1532 | */ | |
1533 | if (creating) { | |
1534 | /* We are creating array, so we *know* how much room has | |
1535 | * been left. | |
1536 | */ | |
1537 | offset = 0; | |
1538 | room = choose_bm_space(__le64_to_cpu(sb->size)); | |
1539 | } else { | |
1540 | room = __le64_to_cpu(sb->super_offset) | |
1541 | - __le64_to_cpu(sb->data_offset) | |
1542 | - __le64_to_cpu(sb->data_size); | |
1543 | ||
1544 | if (!may_change || (room < 3*2 && | |
1545 | __le32_to_cpu(sb->max_dev) <= 384)) { | |
1546 | room = 3*2; | |
1547 | offset = 1*2; | |
1548 | } else { | |
1549 | offset = 0; /* means movable offset */ | |
1550 | } | |
1551 | } | |
1552 | break; | |
1553 | case 1: | |
1554 | case 2: /* between superblock and data */ | |
1555 | if (creating) { | |
1556 | offset = 4*2; | |
1557 | room = choose_bm_space(__le64_to_cpu(sb->size)); | |
1558 | } else { | |
1559 | room = __le64_to_cpu(sb->data_offset) | |
1560 | - __le64_to_cpu(sb->super_offset); | |
1561 | if (!may_change) { | |
1562 | room -= 2; /* Leave 1K for superblock */ | |
1563 | offset = 2; | |
1564 | } else { | |
1565 | room -= 4*2; /* leave 4K for superblock */ | |
1566 | offset = 4*2; | |
1567 | } | |
1568 | } | |
1569 | break; | |
1570 | default: | |
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | if (chunk == UnSet && room > 128*2) | |
1575 | /* Limit to 128K of bitmap when chunk size not requested */ | |
1576 | room = 128*2; | |
1577 | ||
1578 | max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8; | |
1579 | ||
1580 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
1581 | bits = (size*512)/min_chunk +1; | |
1582 | while (bits > max_bits) { | |
1583 | min_chunk *= 2; | |
1584 | bits = (bits+1)/2; | |
1585 | } | |
1586 | if (chunk == UnSet) { | |
1587 | /* For practical purpose, 64Meg is a good | |
1588 | * default chunk size for internal bitmaps. | |
1589 | */ | |
1590 | chunk = min_chunk; | |
1591 | if (chunk < 64*1024*1024) | |
1592 | chunk = 64*1024*1024; | |
1593 | } else if (chunk < min_chunk) | |
1594 | return 0; /* chunk size too small */ | |
1595 | if (chunk == 0) /* rounding problem */ | |
1596 | return 0; | |
1597 | ||
1598 | if (offset == 0) { | |
1599 | /* start bitmap on a 4K boundary with enough space for | |
1600 | * the bitmap | |
1601 | */ | |
1602 | bits = (size*512) / chunk + 1; | |
1603 | room = ((bits+7)/8 + sizeof(bitmap_super_t) +4095)/4096; | |
1604 | room *= 8; /* convert 4K blocks to sectors */ | |
1605 | offset = -room; | |
1606 | } | |
1607 | ||
1608 | sb->bitmap_offset = __cpu_to_le32(offset); | |
1609 | ||
1610 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | |
1611 | | MD_FEATURE_BITMAP_OFFSET); | |
1612 | memset(bms, 0, sizeof(*bms)); | |
1613 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); | |
1614 | bms->version = __cpu_to_le32(major); | |
1615 | uuid_from_super1(st, uuid); | |
1616 | memcpy(bms->uuid, uuid, 16); | |
1617 | bms->chunksize = __cpu_to_le32(chunk); | |
1618 | bms->daemon_sleep = __cpu_to_le32(delay); | |
1619 | bms->sync_size = __cpu_to_le64(size); | |
1620 | bms->write_behind = __cpu_to_le32(write_behind); | |
1621 | ||
1622 | *chunkp = chunk; | |
1623 | return 1; | |
1624 | } | |
1625 | ||
1626 | static void locate_bitmap1(struct supertype *st, int fd) | |
1627 | { | |
1628 | unsigned long long offset; | |
1629 | struct mdp_superblock_1 *sb; | |
1630 | int mustfree = 0; | |
1631 | ||
1632 | if (!st->sb) { | |
1633 | if (st->ss->load_super(st, fd, NULL)) | |
1634 | return; /* no error I hope... */ | |
1635 | mustfree = 1; | |
1636 | } | |
1637 | sb = st->sb; | |
1638 | ||
1639 | offset = __le64_to_cpu(sb->super_offset); | |
1640 | offset += (int32_t) __le32_to_cpu(sb->bitmap_offset); | |
1641 | if (mustfree) | |
1642 | free(sb); | |
1643 | lseek64(fd, offset<<9, 0); | |
1644 | } | |
1645 | ||
1646 | static int write_bitmap1(struct supertype *st, int fd) | |
1647 | { | |
1648 | struct mdp_superblock_1 *sb = st->sb; | |
1649 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); | |
1650 | int rv = 0; | |
1651 | void *buf; | |
1652 | int towrite, n; | |
1653 | ||
1654 | locate_bitmap1(st, fd); | |
1655 | ||
1656 | if (posix_memalign(&buf, 4096, 4096)) | |
1657 | return -ENOMEM; | |
1658 | ||
1659 | memset(buf, 0xff, 4096); | |
1660 | memcpy(buf, ((char*)sb)+1024, sizeof(bitmap_super_t)); | |
1661 | ||
1662 | towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); | |
1663 | towrite = (towrite+7) >> 3; /* bits to bytes */ | |
1664 | towrite += sizeof(bitmap_super_t); | |
1665 | towrite = ROUND_UP(towrite, 512); | |
1666 | while (towrite > 0) { | |
1667 | n = towrite; | |
1668 | if (n > 4096) | |
1669 | n = 4096; | |
1670 | n = awrite(fd, buf, n); | |
1671 | if (n > 0) | |
1672 | towrite -= n; | |
1673 | else | |
1674 | break; | |
1675 | memset(buf, 0xff, 4096); | |
1676 | } | |
1677 | fsync(fd); | |
1678 | if (towrite) | |
1679 | rv = -2; | |
1680 | ||
1681 | free(buf); | |
1682 | return rv; | |
1683 | } | |
1684 | ||
1685 | static void free_super1(struct supertype *st) | |
1686 | { | |
1687 | if (st->sb) | |
1688 | free(st->sb); | |
1689 | while (st->info) { | |
1690 | struct devinfo *di = st->info; | |
1691 | st->info = di->next; | |
1692 | if (di->fd >= 0) | |
1693 | close(di->fd); | |
1694 | free(di); | |
1695 | } | |
1696 | st->sb = NULL; | |
1697 | } | |
1698 | ||
1699 | #ifndef MDASSEMBLE | |
1700 | static int validate_geometry1(struct supertype *st, int level, | |
1701 | int layout, int raiddisks, | |
1702 | int *chunk, unsigned long long size, | |
1703 | char *subdev, unsigned long long *freesize, | |
1704 | int verbose) | |
1705 | { | |
1706 | unsigned long long ldsize; | |
1707 | int fd; | |
1708 | ||
1709 | if (level == LEVEL_CONTAINER) { | |
1710 | if (verbose) | |
1711 | fprintf(stderr, Name ": 1.x metadata does not support containers\n"); | |
1712 | return 0; | |
1713 | } | |
1714 | if (chunk && *chunk == UnSet) | |
1715 | *chunk = DEFAULT_CHUNK; | |
1716 | ||
1717 | if (!subdev) | |
1718 | return 1; | |
1719 | ||
1720 | fd = open(subdev, O_RDONLY|O_EXCL, 0); | |
1721 | if (fd < 0) { | |
1722 | if (verbose) | |
1723 | fprintf(stderr, Name ": super1.x cannot open %s: %s\n", | |
1724 | subdev, strerror(errno)); | |
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | if (!get_dev_size(fd, subdev, &ldsize)) { | |
1729 | close(fd); | |
1730 | return 0; | |
1731 | } | |
1732 | close(fd); | |
1733 | ||
1734 | *freesize = avail_size1(st, ldsize >> 9); | |
1735 | return 1; | |
1736 | } | |
1737 | #endif /* MDASSEMBLE */ | |
1738 | ||
1739 | struct superswitch super1 = { | |
1740 | #ifndef MDASSEMBLE | |
1741 | .examine_super = examine_super1, | |
1742 | .brief_examine_super = brief_examine_super1, | |
1743 | .export_examine_super = export_examine_super1, | |
1744 | .detail_super = detail_super1, | |
1745 | .brief_detail_super = brief_detail_super1, | |
1746 | .export_detail_super = export_detail_super1, | |
1747 | .write_init_super = write_init_super1, | |
1748 | .validate_geometry = validate_geometry1, | |
1749 | .add_to_super = add_to_super1, | |
1750 | #endif | |
1751 | .match_home = match_home1, | |
1752 | .uuid_from_super = uuid_from_super1, | |
1753 | .getinfo_super = getinfo_super1, | |
1754 | .container_content = container_content1, | |
1755 | .update_super = update_super1, | |
1756 | .init_super = init_super1, | |
1757 | .store_super = store_super1, | |
1758 | .compare_super = compare_super1, | |
1759 | .load_super = load_super1, | |
1760 | .match_metadata_desc = match_metadata_desc1, | |
1761 | .avail_size = avail_size1, | |
1762 | .add_internal_bitmap = add_internal_bitmap1, | |
1763 | .locate_bitmap = locate_bitmap1, | |
1764 | .write_bitmap = write_bitmap1, | |
1765 | .free_super = free_super1, | |
1766 | #if __BYTE_ORDER == BIG_ENDIAN | |
1767 | .swapuuid = 0, | |
1768 | #else | |
1769 | .swapuuid = 1, | |
1770 | #endif | |
1771 | .name = "1.x", | |
1772 | }; |