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Commit | Line | Data |
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4b1ac34b NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2004 Neil Brown <neilb@cse.unsw.edu.au> | |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
30 | #include "mdadm.h" | |
55935d51 | 31 | #include <asm/byteorder.h> |
4b1ac34b NB |
32 | |
33 | /* | |
34 | * All handling for the 0.90.0 version superblock is in | |
35 | * this file. | |
36 | * This includes: | |
37 | * - finding, loading, and writing the superblock. | |
38 | * - initialising a new superblock | |
39 | * - printing the superblock for --examine | |
40 | * - printing part of the superblock for --detail | |
41 | * .. other stuff | |
42 | */ | |
43 | ||
44 | ||
45 | static unsigned long calc_sb0_csum(mdp_super_t *super) | |
46 | { | |
47 | unsigned long csum = super->sb_csum; | |
48 | unsigned long newcsum; | |
49 | super->sb_csum= 0 ; | |
50 | newcsum = calc_csum(super, MD_SB_BYTES); | |
51 | super->sb_csum = csum; | |
52 | return newcsum; | |
53 | } | |
54 | ||
586ed405 NB |
55 | |
56 | void super0_swap_endian(struct mdp_superblock_s *sb) | |
57 | { | |
58 | /* as super0 superblocks are host-endian, it is sometimes | |
59 | * useful to be able to swap the endianness | |
60 | * as (almost) everything is u32's we byte-swap every 4byte | |
61 | * number. | |
62 | * We then also have to swap the events_hi and events_lo | |
63 | */ | |
64 | char *sbc = (char *)sb; | |
65 | __u32 t32; | |
66 | int i; | |
67 | ||
68 | for (i=0; i < MD_SB_BYTES ; i+=4) { | |
69 | char t = sbc[i]; | |
70 | sbc[i] = sbc[i+3]; | |
71 | sbc[i+3] = t; | |
72 | t=sbc[i+1]; | |
73 | sbc[i+1]=sbc[i+2]; | |
74 | sbc[i+2]=t; | |
75 | } | |
76 | t32 = sb->events_hi; | |
77 | sb->events_hi = sb->events_lo; | |
78 | sb->events_lo = t32; | |
79 | ||
80 | t32 = sb->cp_events_hi; | |
81 | sb->cp_events_hi = sb->cp_events_lo; | |
82 | sb->cp_events_lo = t32; | |
83 | ||
84 | } | |
85 | ||
c7654afc | 86 | #ifndef MDASSEMBLE |
586ed405 | 87 | |
f9ce90ba | 88 | static void examine_super0(void *sbv) |
4b1ac34b NB |
89 | { |
90 | mdp_super_t *sb = sbv; | |
91 | time_t atime; | |
92 | int d; | |
93 | char *c; | |
94 | ||
95 | printf(" Magic : %08x\n", sb->md_magic); | |
96 | printf(" Version : %02d.%02d.%02d\n", sb->major_version, sb->minor_version, | |
97 | sb->patch_version); | |
98 | if (sb->minor_version >= 90) | |
99 | printf(" UUID : %08x:%08x:%08x:%08x\n", sb->set_uuid0, sb->set_uuid1, | |
100 | sb->set_uuid2, sb->set_uuid3); | |
101 | else | |
102 | printf(" UUID : %08x\n", sb->set_uuid0); | |
103 | ||
104 | atime = sb->ctime; | |
105 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
106 | c=map_num(pers, sb->level); | |
107 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
108 | if ((int)sb->level >= 0) | |
109 | printf(" Device Size : %d%s\n", sb->size, human_size((long long)sb->size<<10)); | |
110 | printf(" Raid Devices : %d\n", sb->raid_disks); | |
111 | printf(" Total Devices : %d\n", sb->nr_disks); | |
112 | printf("Preferred Minor : %d\n", sb->md_minor); | |
113 | printf("\n"); | |
114 | atime = sb->utime; | |
115 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
116 | printf(" State : %s\n", | |
117 | (sb->state&(1<<MD_SB_CLEAN))?"clean":"active"); | |
55935d51 NB |
118 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) |
119 | printf("Internal Bitmap : present\n"); | |
4b1ac34b NB |
120 | printf(" Active Devices : %d\n", sb->active_disks); |
121 | printf("Working Devices : %d\n", sb->working_disks); | |
122 | printf(" Failed Devices : %d\n", sb->failed_disks); | |
123 | printf(" Spare Devices : %d\n", sb->spare_disks); | |
124 | if (calc_sb0_csum(sb) == sb->sb_csum) | |
125 | printf(" Checksum : %x - correct\n", sb->sb_csum); | |
126 | else | |
127 | printf(" Checksum : %x - expected %lx\n", sb->sb_csum, calc_sb0_csum(sb)); | |
128 | printf(" Events : %d.%d\n", sb->events_hi, sb->events_lo); | |
129 | printf("\n"); | |
130 | if (sb->level == 5) { | |
131 | c = map_num(r5layout, sb->layout); | |
132 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
133 | } | |
134 | switch(sb->level) { | |
135 | case 0: | |
136 | case 4: | |
137 | case 5: | |
138 | printf(" Chunk Size : %dK\n", sb->chunk_size/1024); | |
139 | break; | |
140 | case -1: | |
141 | printf(" Rounding : %dK\n", sb->chunk_size/1024); | |
142 | break; | |
143 | default: break; | |
144 | } | |
145 | printf("\n"); | |
146 | printf(" Number Major Minor RaidDevice State\n"); | |
147 | for (d= -1; d<(signed int)(sb->raid_disks+sb->spare_disks); d++) { | |
148 | mdp_disk_t *dp; | |
149 | char *dv; | |
150 | char nb[5]; | |
dfd4d8ee | 151 | int wonly; |
4b1ac34b NB |
152 | if (d>=0) dp = &sb->disks[d]; |
153 | else dp = &sb->this_disk; | |
8f23b0b3 | 154 | snprintf(nb, sizeof(nb), "%4d", d); |
4b1ac34b NB |
155 | printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb, |
156 | dp->number, dp->major, dp->minor, dp->raid_disk); | |
dfd4d8ee NB |
157 | wonly = dp->state & (1<<MD_DISK_WRITEMOSTLY); |
158 | dp->state &= ~(1<<MD_DISK_WRITEMOSTLY); | |
4b1ac34b NB |
159 | if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty"); |
160 | if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active"); | |
161 | if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync"); | |
162 | if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed"); | |
dfd4d8ee | 163 | if (wonly) printf(" write-mostly"); |
4b1ac34b NB |
164 | if (dp->state == 0) printf(" spare"); |
165 | if ((dv=map_dev(dp->major, dp->minor))) | |
166 | printf(" %s", dv); | |
167 | printf("\n"); | |
168 | if (d == -1) printf("\n"); | |
169 | } | |
170 | } | |
171 | ||
f9ce90ba | 172 | static void brief_examine_super0(void *sbv) |
4b1ac34b NB |
173 | { |
174 | mdp_super_t *sb = sbv; | |
175 | char *c=map_num(pers, sb->level); | |
176 | ||
177 | printf("ARRAY %s level=%s num-devices=%d UUID=", | |
178 | get_md_name(sb->md_minor), | |
179 | c?c:"-unknown-", sb->raid_disks); | |
180 | if (sb->minor_version >= 90) | |
181 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
182 | sb->set_uuid2, sb->set_uuid3); | |
183 | else | |
184 | printf("%08x", sb->set_uuid0); | |
185 | printf("\n"); | |
186 | } | |
187 | ||
f9ce90ba | 188 | static void detail_super0(void *sbv) |
4b1ac34b NB |
189 | { |
190 | mdp_super_t *sb = sbv; | |
191 | printf(" UUID : "); | |
192 | if (sb->minor_version >= 90) | |
193 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
194 | sb->set_uuid2, sb->set_uuid3); | |
195 | else | |
196 | printf("%08x", sb->set_uuid0); | |
197 | printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo); | |
198 | } | |
199 | ||
f9ce90ba | 200 | static void brief_detail_super0(void *sbv) |
4b1ac34b NB |
201 | { |
202 | mdp_super_t *sb = sbv; | |
203 | printf(" UUID="); | |
204 | if (sb->minor_version >= 90) | |
205 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
206 | sb->set_uuid2, sb->set_uuid3); | |
207 | else | |
208 | printf("%08x", sb->set_uuid0); | |
209 | } | |
c7654afc | 210 | #endif |
f9ce90ba | 211 | static void uuid_from_super0(int uuid[4], void * sbv) |
4b1ac34b NB |
212 | { |
213 | mdp_super_t *super = sbv; | |
214 | uuid[0] = super->set_uuid0; | |
215 | if (super->minor_version >= 90) { | |
216 | uuid[1] = super->set_uuid1; | |
217 | uuid[2] = super->set_uuid2; | |
218 | uuid[3] = super->set_uuid3; | |
219 | } else { | |
220 | uuid[1] = 0; | |
221 | uuid[2] = 0; | |
222 | uuid[3] = 0; | |
223 | } | |
224 | } | |
225 | ||
947fd4dd | 226 | static void getinfo_super0(struct mdinfo *info, mddev_ident_t ident, void *sbv) |
4b1ac34b NB |
227 | { |
228 | mdp_super_t *sb = sbv; | |
229 | int working = 0; | |
230 | int i; | |
231 | ||
232 | info->array.major_version = sb->major_version; | |
233 | info->array.minor_version = sb->minor_version; | |
234 | info->array.patch_version = sb->patch_version; | |
235 | info->array.raid_disks = sb->raid_disks; | |
236 | info->array.level = sb->level; | |
237 | info->array.md_minor = sb->md_minor; | |
238 | info->array.ctime = sb->ctime; | |
239 | ||
240 | info->disk.state = sb->this_disk.state; | |
241 | info->disk.major = sb->this_disk.major; | |
242 | info->disk.minor = sb->this_disk.minor; | |
243 | info->disk.raid_disk = sb->this_disk.raid_disk; | |
fbf8a0b7 | 244 | info->disk.number = sb->this_disk.number; |
4b1ac34b NB |
245 | |
246 | info->events = md_event(sb); | |
247 | ||
248 | uuid_from_super0(info->uuid, sbv); | |
947fd4dd NB |
249 | |
250 | ident->name[0] = 0; | |
4b1ac34b NB |
251 | /* work_disks is calculated rather than read directly */ |
252 | for (i=0; i < MD_SB_DISKS; i++) | |
253 | if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) && | |
254 | (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) && | |
255 | !(sb->disks[i].state & (1<<MD_DISK_FAULTY))) | |
256 | working ++; | |
257 | info->array.working_disks = working; | |
258 | } | |
259 | ||
260 | ||
f9ce90ba | 261 | static int update_super0(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose) |
4b1ac34b NB |
262 | { |
263 | int rv = 0; | |
264 | mdp_super_t *sb = sbv; | |
265 | if (strcmp(update, "sparc2.2")==0 ) { | |
266 | /* 2.2 sparc put the events in the wrong place | |
267 | * So we copy the tail of the superblock | |
268 | * up 4 bytes before continuing | |
269 | */ | |
270 | __u32 *sb32 = (__u32*)sb; | |
271 | memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, | |
272 | sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1, | |
273 | (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4); | |
dab6685f NB |
274 | if (verbose >= 0) |
275 | fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n", | |
276 | devname); | |
4b1ac34b NB |
277 | } |
278 | if (strcmp(update, "super-minor") ==0) { | |
279 | sb->md_minor = info->array.md_minor; | |
dab6685f | 280 | if (verbose > 0) |
4b1ac34b NB |
281 | fprintf(stderr, Name ": updating superblock of %s with minor number %d\n", |
282 | devname, info->array.md_minor); | |
283 | } | |
284 | if (strcmp(update, "summaries") == 0) { | |
285 | int i; | |
286 | /* set nr_disks, active_disks, working_disks, | |
287 | * failed_disks, spare_disks based on disks[] | |
288 | * array in superblock. | |
289 | * Also make sure extra slots aren't 'failed' | |
290 | */ | |
291 | sb->nr_disks = sb->active_disks = | |
292 | sb->working_disks = sb->failed_disks = | |
293 | sb->spare_disks = 0; | |
294 | for (i=0; i < MD_SB_DISKS ; i++) | |
295 | if (sb->disks[i].major || | |
296 | sb->disks[i].minor) { | |
297 | int state = sb->disks[i].state; | |
298 | if (state & (1<<MD_DISK_REMOVED)) | |
299 | continue; | |
300 | sb->nr_disks++; | |
301 | if (state & (1<<MD_DISK_ACTIVE)) | |
302 | sb->active_disks++; | |
303 | if (state & (1<<MD_DISK_FAULTY)) | |
304 | sb->failed_disks++; | |
305 | else | |
306 | sb->working_disks++; | |
307 | if (state == 0) | |
308 | sb->spare_disks++; | |
309 | } else if (i >= sb->raid_disks && sb->disks[i].number == 0) | |
310 | sb->disks[i].state = 0; | |
311 | } | |
312 | if (strcmp(update, "force")==0) { | |
313 | sb->events_hi = (info->events>>32) & 0xFFFFFFFF; | |
314 | sb->events_lo = (info->events) & 0xFFFFFFFF; | |
315 | if (sb->level == 5 || sb->level == 4 || sb->level == 6) | |
316 | /* need to force clean */ | |
317 | sb->state |= (1 << MD_SB_CLEAN); | |
318 | } | |
319 | if (strcmp(update, "assemble")==0) { | |
320 | int d = info->disk.number; | |
dfd4d8ee NB |
321 | int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY); |
322 | sb->disks[d].state &= ~(1<<MD_DISK_WRITEMOSTLY); | |
4b1ac34b | 323 | if (sb->disks[d].state != info->disk.state) { |
dfd4d8ee | 324 | sb->disks[d].state = info->disk.state & wonly; |
4b1ac34b NB |
325 | rv = 1; |
326 | } | |
327 | } | |
328 | if (strcmp(update, "newdev") == 0) { | |
329 | int d = info->disk.number; | |
330 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
331 | sb->disks[d].number = d; | |
332 | sb->disks[d].major = info->disk.major; | |
333 | sb->disks[d].minor = info->disk.minor; | |
334 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
335 | sb->disks[d].state = info->disk.state; | |
336 | sb->this_disk = sb->disks[d]; | |
337 | } | |
338 | if (strcmp(update, "grow") == 0) { | |
339 | sb->raid_disks = info->array.raid_disks; | |
340 | sb->nr_disks = info->array.nr_disks; | |
341 | sb->active_disks = info->array.active_disks; | |
342 | sb->working_disks = info->array.working_disks; | |
343 | memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0])); | |
344 | sb->disks[info->disk.number].number = info->disk.number; | |
345 | sb->disks[info->disk.number].major = info->disk.major; | |
346 | sb->disks[info->disk.number].minor = info->disk.minor; | |
347 | sb->disks[info->disk.number].raid_disk = info->disk.raid_disk; | |
348 | sb->disks[info->disk.number].state = info->disk.state; | |
349 | if (sb->this_disk.number == info->disk.number) | |
350 | sb->this_disk = sb->disks[info->disk.number]; | |
351 | } | |
352 | if (strcmp(update, "resync") == 0) { | |
353 | /* make sure resync happens */ | |
354 | sb->state &= ~(1<<MD_SB_CLEAN); | |
355 | sb->recovery_cp = 0; | |
356 | } | |
357 | ||
358 | sb->sb_csum = calc_sb0_csum(sb); | |
359 | return rv; | |
360 | } | |
361 | ||
f9ce90ba | 362 | static __u64 event_super0(void *sbv) |
4b1ac34b NB |
363 | { |
364 | mdp_super_t *sb = sbv; | |
365 | return md_event(sb); | |
366 | } | |
367 | ||
368 | ||
369 | ||
947fd4dd | 370 | static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, char *ignored_name) |
4b1ac34b | 371 | { |
55935d51 | 372 | mdp_super_t *sb = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
82d9eba6 | 373 | int spares; |
dfe47e00 | 374 | int rfd; |
55935d51 | 375 | memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b | 376 | |
f9ce90ba NB |
377 | if (info->major_version == -1) { |
378 | /* zeroing the superblock */ | |
82d9eba6 NB |
379 | return 0; |
380 | } | |
381 | ||
382 | spares = info->working_disks - info->active_disks; | |
383 | if (info->raid_disks + spares > MD_SB_DISKS) { | |
384 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
385 | info->raid_disks , spares, MD_SB_DISKS); | |
386 | return 0; | |
f9ce90ba NB |
387 | } |
388 | ||
dfe47e00 | 389 | rfd = open("/dev/urandom", O_RDONLY); |
4b1ac34b NB |
390 | sb->md_magic = MD_SB_MAGIC; |
391 | sb->major_version = 0; | |
392 | sb->minor_version = 90; | |
393 | sb->patch_version = 0; | |
394 | sb->gvalid_words = 0; /* ignored */ | |
dfe47e00 NB |
395 | if (rfd < 0 || read(rfd, &sb->set_uuid0, 4) != 4) |
396 | sb->set_uuid0 = random(); | |
4b1ac34b NB |
397 | sb->ctime = time(0); |
398 | sb->level = info->level; | |
399 | sb->size = info->size; | |
400 | sb->nr_disks = info->nr_disks; | |
401 | sb->raid_disks = info->raid_disks; | |
402 | sb->md_minor = info->md_minor; | |
403 | sb->not_persistent = 0; | |
dfe47e00 NB |
404 | if (rfd < 0 || read(rfd, &sb->set_uuid1, 12) != 12) { |
405 | sb->set_uuid1 = random(); | |
406 | sb->set_uuid2 = random(); | |
407 | sb->set_uuid3 = random(); | |
408 | } | |
409 | if (rfd >= 0) | |
410 | close(rfd); | |
4b1ac34b NB |
411 | |
412 | sb->utime = sb->ctime; | |
413 | sb->state = info->state; | |
414 | sb->active_disks = info->active_disks; | |
415 | sb->working_disks = info->working_disks; | |
416 | sb->failed_disks = info->failed_disks; | |
234a131a | 417 | sb->spare_disks = info->spare_disks; |
4b1ac34b NB |
418 | sb->events_hi = 0; |
419 | sb->events_lo = 1; | |
420 | ||
421 | sb->layout = info->layout; | |
422 | sb->chunk_size = info->chunk_size; | |
423 | ||
424 | *sbp = sb; | |
82d9eba6 | 425 | return 1; |
4b1ac34b NB |
426 | } |
427 | ||
428 | /* Add a device to the superblock being created */ | |
f9ce90ba | 429 | static void add_to_super0(void *sbv, mdu_disk_info_t *dinfo) |
4b1ac34b NB |
430 | { |
431 | mdp_super_t *sb = sbv; | |
432 | mdp_disk_t *dk = &sb->disks[dinfo->number]; | |
433 | ||
434 | dk->number = dinfo->number; | |
435 | dk->major = dinfo->major; | |
436 | dk->minor = dinfo->minor; | |
437 | dk->raid_disk = dinfo->raid_disk; | |
438 | dk->state = dinfo->state; | |
439 | } | |
440 | ||
96395475 | 441 | static int store_super0(struct supertype *st, int fd, void *sbv) |
4b1ac34b NB |
442 | { |
443 | unsigned long size; | |
444 | unsigned long long dsize; | |
445 | unsigned long long offset; | |
f9ce90ba | 446 | mdp_super_t *super = sbv; |
4b1ac34b NB |
447 | |
448 | #ifdef BLKGETSIZE64 | |
449 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
450 | #endif | |
451 | { | |
452 | if (ioctl(fd, BLKGETSIZE, &size)) | |
453 | return 1; | |
454 | else | |
455 | dsize = ((unsigned long long)size)<<9; | |
456 | } | |
457 | ||
458 | if (dsize < MD_RESERVED_SECTORS*2) | |
459 | return 2; | |
460 | ||
461 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); | |
462 | ||
463 | offset *= 512; | |
464 | ||
465 | if (lseek64(fd, offset, 0)< 0LL) | |
466 | return 3; | |
467 | ||
468 | if (write(fd, super, sizeof(*super)) != sizeof(*super)) | |
469 | return 4; | |
470 | ||
570c0542 | 471 | fsync(fd); |
4b1ac34b NB |
472 | return 0; |
473 | } | |
474 | ||
1bf4e2d9 | 475 | static int write_init_super0(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname) |
4b1ac34b NB |
476 | { |
477 | mdp_super_t *sb = sbv; | |
dfd4d8ee | 478 | int fd = open(devname, O_RDWR|O_EXCL); |
4b1ac34b NB |
479 | int rv; |
480 | ||
481 | if (fd < 0) { | |
482 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", devname); | |
483 | return -1; | |
484 | } | |
485 | ||
8d75b7fc NB |
486 | sb->disks[dinfo->number].state &= ~(1<<MD_DISK_FAULTY); |
487 | sb->disks[dinfo->number].state |= (1<<MD_DISK_SYNC); | |
488 | ||
4b1ac34b NB |
489 | sb->this_disk = sb->disks[dinfo->number]; |
490 | sb->sb_csum = calc_sb0_csum(sb); | |
96395475 | 491 | rv = store_super0(st, fd, sb); |
55935d51 | 492 | |
1bf4e2d9 NB |
493 | if (rv == 0 && (sb->state & (1<<MD_SB_BITMAP_PRESENT))) |
494 | rv = st->ss->write_bitmap(st, fd, sbv); | |
55935d51 | 495 | |
4b1ac34b NB |
496 | close(fd); |
497 | if (rv) | |
498 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
499 | return rv; | |
500 | } | |
501 | ||
f9ce90ba | 502 | static int compare_super0(void **firstp, void *secondv) |
4b1ac34b NB |
503 | { |
504 | /* | |
505 | * return: | |
506 | * 0 same, or first was empty, and second was copied | |
507 | * 1 second had wrong number | |
508 | * 2 wrong uuid | |
509 | * 3 wrong other info | |
510 | */ | |
511 | mdp_super_t *first = *firstp; | |
512 | mdp_super_t *second = secondv; | |
513 | ||
514 | int uuid1[4], uuid2[4]; | |
515 | if (second->md_magic != MD_SB_MAGIC) | |
516 | return 1; | |
517 | if (!first) { | |
518 | first = malloc(MD_SB_BYTES); | |
519 | memcpy(first, second, MD_SB_BYTES); | |
520 | *firstp = first; | |
521 | return 0; | |
522 | } | |
523 | ||
524 | uuid_from_super0(uuid1, first); | |
525 | uuid_from_super0(uuid2, second); | |
f277ce36 | 526 | if (!same_uuid(uuid1, uuid2, 0)) |
4b1ac34b NB |
527 | return 2; |
528 | if (first->major_version != second->major_version || | |
529 | first->minor_version != second->minor_version || | |
530 | first->patch_version != second->patch_version || | |
531 | first->gvalid_words != second->gvalid_words || | |
532 | first->ctime != second->ctime || | |
533 | first->level != second->level || | |
534 | first->size != second->size || | |
535 | first->raid_disks != second->raid_disks ) | |
536 | return 3; | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
541 | ||
82d9eba6 | 542 | static int load_super0(struct supertype *st, int fd, void **sbp, char *devname) |
4b1ac34b NB |
543 | { |
544 | /* try to read in the superblock | |
545 | * Return: | |
546 | * 0 on success | |
547 | * 1 on cannot get superblock | |
548 | * 2 on superblock meaningless | |
549 | */ | |
550 | unsigned long size; | |
551 | unsigned long long dsize; | |
552 | unsigned long long offset; | |
553 | mdp_super_t *super; | |
554 | ||
555 | #ifdef BLKGETSIZE64 | |
556 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
557 | #endif | |
558 | { | |
559 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
560 | if (devname) | |
561 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
562 | devname, strerror(errno)); | |
563 | return 1; | |
564 | } else | |
565 | dsize = size << 9; | |
566 | } | |
567 | ||
568 | if (dsize < MD_RESERVED_SECTORS*2) { | |
569 | if (devname) | |
570 | fprintf(stderr, Name ": %s is too small for md: size is %ld sectors.\n", | |
571 | devname, size); | |
572 | return 1; | |
573 | } | |
574 | ||
575 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); | |
576 | ||
577 | offset *= 512; | |
578 | ||
579 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
580 | ||
581 | if (lseek64(fd, offset, 0)< 0LL) { | |
582 | if (devname) | |
583 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
584 | devname, strerror(errno)); | |
585 | return 1; | |
586 | } | |
587 | ||
8d75b7fc | 588 | super = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b NB |
589 | |
590 | if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) { | |
591 | if (devname) | |
592 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
593 | devname); | |
594 | free(super); | |
595 | return 1; | |
596 | } | |
597 | ||
586ed405 NB |
598 | if (st->ss && st->minor_version == 9) |
599 | super0_swap_endian(super); | |
600 | ||
4b1ac34b NB |
601 | if (super->md_magic != MD_SB_MAGIC) { |
602 | if (devname) | |
603 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
604 | devname, MD_SB_MAGIC, super->md_magic); | |
605 | free(super); | |
606 | return 2; | |
607 | } | |
608 | ||
609 | if (super->major_version != 0) { | |
610 | if (devname) | |
611 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
612 | devname, super->major_version); | |
613 | free(super); | |
614 | return 2; | |
615 | } | |
616 | *sbp = super; | |
82d9eba6 NB |
617 | if (st->ss == NULL) { |
618 | st->ss = &super0; | |
619 | st->minor_version = 90; | |
ea329559 | 620 | st->max_devs = MD_SB_DISKS; |
82d9eba6 NB |
621 | } |
622 | ||
4b1ac34b NB |
623 | return 0; |
624 | } | |
f9ce90ba | 625 | |
82d9eba6 | 626 | static struct supertype *match_metadata_desc0(char *arg) |
f9ce90ba | 627 | { |
82d9eba6 NB |
628 | struct supertype *st = malloc(sizeof(*st)); |
629 | if (!st) return st; | |
630 | ||
631 | st->ss = &super0; | |
632 | st->minor_version = 90; | |
ea329559 | 633 | st->max_devs = MD_SB_DISKS; |
f9ce90ba NB |
634 | if (strcmp(arg, "0") == 0 || |
635 | strcmp(arg, "0.90") == 0 || | |
636 | strcmp(arg, "default") == 0 | |
637 | ) | |
82d9eba6 NB |
638 | return st; |
639 | ||
586ed405 NB |
640 | st->minor_version = 9; /* flag for 'byte-swapped' */ |
641 | if (strcmp(arg, "0.swap")==0) | |
642 | return st; | |
643 | ||
82d9eba6 NB |
644 | free(st); |
645 | return NULL; | |
646 | } | |
647 | ||
1bf4e2d9 | 648 | static __u64 avail_size0(struct supertype *st, __u64 devsize) |
82d9eba6 NB |
649 | { |
650 | if (devsize < MD_RESERVED_SECTORS*2) | |
651 | return 0ULL; | |
652 | return MD_NEW_SIZE_SECTORS(devsize); | |
f9ce90ba NB |
653 | } |
654 | ||
1bf4e2d9 | 655 | static int add_internal_bitmap0(struct supertype *st, void *sbv, int chunk, int delay, int write_behind, int *sizep, int may_change) |
55935d51 NB |
656 | { |
657 | /* | |
658 | * The bitmap comes immediately after the superblock and must be 60K in size | |
659 | * at most. The default size is between 30K and 60K | |
660 | * | |
661 | * size is in K, chunk is in bytes !!! | |
662 | */ | |
1bf4e2d9 NB |
663 | unsigned long long size = *sizep; |
664 | unsigned long long bits; | |
55935d51 NB |
665 | unsigned long long max_bits = 60*1024*8; |
666 | unsigned long long min_chunk; | |
667 | mdp_super_t *sb = sbv; | |
668 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES); | |
669 | ||
670 | ||
f277ce36 | 671 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ |
1bf4e2d9 | 672 | bits = (size * 1024)/ min_chunk +1; |
55935d51 NB |
673 | while (bits > max_bits) { |
674 | min_chunk *= 2; | |
675 | bits = (bits+1)/2; | |
676 | } | |
677 | if (chunk == UnSet) | |
678 | chunk = min_chunk; | |
679 | else if (chunk < min_chunk) | |
680 | return 0; /* chunk size too small */ | |
681 | ||
682 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); | |
683 | ||
8d75b7fc | 684 | memset(bms, sizeof(*bms), 0); |
dfd4d8ee NB |
685 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
686 | bms->version = __cpu_to_le32(BITMAP_MAJOR); | |
55935d51 | 687 | uuid_from_super0((int*)bms->uuid, sb); |
dfd4d8ee NB |
688 | bms->chunksize = __cpu_to_le32(chunk); |
689 | bms->daemon_sleep = __cpu_to_le32(delay); | |
1bf4e2d9 | 690 | bms->sync_size = __cpu_to_le64(size<<1); |
dfd4d8ee | 691 | bms->write_behind = __cpu_to_le32(write_behind); |
55935d51 NB |
692 | |
693 | ||
8d75b7fc | 694 | |
55935d51 NB |
695 | return 1; |
696 | } | |
697 | ||
698 | ||
699 | void locate_bitmap0(struct supertype *st, int fd) | |
700 | { | |
701 | unsigned long long dsize; | |
702 | unsigned long size; | |
703 | unsigned long long offset; | |
704 | #ifdef BLKGETSIZE64 | |
705 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
706 | #endif | |
707 | { | |
708 | if (ioctl(fd, BLKGETSIZE, &size)) | |
709 | return; | |
710 | else | |
711 | dsize = ((unsigned long long)size)<<9; | |
712 | } | |
713 | ||
714 | if (dsize < MD_RESERVED_SECTORS*2) | |
715 | return; | |
716 | ||
717 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); | |
718 | ||
719 | offset *= 512; | |
720 | ||
721 | offset += MD_SB_BYTES; | |
722 | ||
723 | lseek64(fd, offset, 0); | |
724 | } | |
725 | ||
8d75b7fc NB |
726 | int write_bitmap0(struct supertype *st, int fd, void *sbv) |
727 | { | |
728 | unsigned long size; | |
729 | unsigned long long dsize; | |
730 | unsigned long long offset; | |
731 | mdp_super_t *sb = sbv; | |
732 | ||
733 | int rv = 0; | |
734 | ||
735 | int towrite, n; | |
736 | char buf[4096]; | |
737 | ||
738 | #ifdef BLKGETSIZE64 | |
739 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
740 | #endif | |
741 | { | |
742 | if (ioctl(fd, BLKGETSIZE, &size)) | |
743 | return 1; | |
744 | else | |
745 | dsize = ((unsigned long long)size)<<9; | |
746 | } | |
747 | ||
748 | if (dsize < MD_RESERVED_SECTORS*2) | |
749 | return -1; | |
750 | ||
751 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); | |
752 | ||
753 | offset *= 512; | |
754 | ||
755 | if (lseek64(fd, offset + 4096, 0)< 0LL) | |
756 | return 3; | |
757 | ||
758 | ||
759 | write(fd, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t)); | |
760 | towrite = 64*1024 - MD_SB_BYTES - sizeof(bitmap_super_t); | |
761 | memset(buf, 0xff, sizeof(buf)); | |
762 | while (towrite > 0) { | |
763 | n = towrite; | |
764 | if (n > sizeof(buf)) | |
765 | n = sizeof(buf); | |
766 | n = write(fd, buf, n); | |
767 | if (n > 0) | |
768 | towrite -= n; | |
769 | else | |
770 | break; | |
771 | } | |
dfd4d8ee | 772 | fsync(fd); |
8d75b7fc NB |
773 | if (towrite) |
774 | rv = -2; | |
775 | ||
776 | return rv; | |
777 | } | |
55935d51 | 778 | |
f9ce90ba | 779 | struct superswitch super0 = { |
c7654afc | 780 | #ifndef MDASSEMBLE |
f9ce90ba NB |
781 | .examine_super = examine_super0, |
782 | .brief_examine_super = brief_examine_super0, | |
783 | .detail_super = detail_super0, | |
784 | .brief_detail_super = brief_detail_super0, | |
c7654afc | 785 | #endif |
f9ce90ba NB |
786 | .uuid_from_super = uuid_from_super0, |
787 | .getinfo_super = getinfo_super0, | |
788 | .update_super = update_super0, | |
789 | .event_super = event_super0, | |
790 | .init_super = init_super0, | |
791 | .add_to_super = add_to_super0, | |
792 | .store_super = store_super0, | |
793 | .write_init_super = write_init_super0, | |
794 | .compare_super = compare_super0, | |
795 | .load_super = load_super0, | |
796 | .match_metadata_desc = match_metadata_desc0, | |
82d9eba6 | 797 | .avail_size = avail_size0, |
55935d51 NB |
798 | .add_internal_bitmap = add_internal_bitmap0, |
799 | .locate_bitmap = locate_bitmap0, | |
8d75b7fc | 800 | .write_bitmap = write_bitmap0, |
82d9eba6 | 801 | .major = 0, |
f277ce36 | 802 | .swapuuid = 0, |
f9ce90ba | 803 | }; |