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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" | |
31 | ||
32 | /* | |
33 | * All handling for the 0.90.0 version superblock is in | |
34 | * this file. | |
35 | * This includes: | |
36 | * - finding, loading, and writing the superblock. | |
37 | * - initialising a new superblock | |
38 | * - printing the superblock for --examine | |
39 | * - printing part of the superblock for --detail | |
40 | * .. other stuff | |
41 | */ | |
42 | ||
43 | ||
44 | static unsigned long calc_sb0_csum(mdp_super_t *super) | |
45 | { | |
46 | unsigned long csum = super->sb_csum; | |
47 | unsigned long newcsum; | |
48 | super->sb_csum= 0 ; | |
49 | newcsum = calc_csum(super, MD_SB_BYTES); | |
50 | super->sb_csum = csum; | |
51 | return newcsum; | |
52 | } | |
53 | ||
586ed405 NB |
54 | |
55 | void super0_swap_endian(struct mdp_superblock_s *sb) | |
56 | { | |
57 | /* as super0 superblocks are host-endian, it is sometimes | |
58 | * useful to be able to swap the endianness | |
59 | * as (almost) everything is u32's we byte-swap every 4byte | |
60 | * number. | |
61 | * We then also have to swap the events_hi and events_lo | |
62 | */ | |
63 | char *sbc = (char *)sb; | |
64 | __u32 t32; | |
65 | int i; | |
66 | ||
67 | for (i=0; i < MD_SB_BYTES ; i+=4) { | |
68 | char t = sbc[i]; | |
69 | sbc[i] = sbc[i+3]; | |
70 | sbc[i+3] = t; | |
71 | t=sbc[i+1]; | |
72 | sbc[i+1]=sbc[i+2]; | |
73 | sbc[i+2]=t; | |
74 | } | |
75 | t32 = sb->events_hi; | |
76 | sb->events_hi = sb->events_lo; | |
77 | sb->events_lo = t32; | |
78 | ||
79 | t32 = sb->cp_events_hi; | |
80 | sb->cp_events_hi = sb->cp_events_lo; | |
81 | sb->cp_events_lo = t32; | |
82 | ||
83 | } | |
84 | ||
c7654afc | 85 | #ifndef MDASSEMBLE |
586ed405 | 86 | |
f9ce90ba | 87 | static void examine_super0(void *sbv) |
4b1ac34b NB |
88 | { |
89 | mdp_super_t *sb = sbv; | |
90 | time_t atime; | |
91 | int d; | |
92 | char *c; | |
93 | ||
94 | printf(" Magic : %08x\n", sb->md_magic); | |
95 | printf(" Version : %02d.%02d.%02d\n", sb->major_version, sb->minor_version, | |
96 | sb->patch_version); | |
97 | if (sb->minor_version >= 90) | |
98 | printf(" UUID : %08x:%08x:%08x:%08x\n", sb->set_uuid0, sb->set_uuid1, | |
99 | sb->set_uuid2, sb->set_uuid3); | |
100 | else | |
101 | printf(" UUID : %08x\n", sb->set_uuid0); | |
102 | ||
103 | atime = sb->ctime; | |
104 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
105 | c=map_num(pers, sb->level); | |
106 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
b674b5b8 NB |
107 | if ((int)sb->level >= 0) { |
108 | int ddsks=0; | |
4b1ac34b | 109 | printf(" Device Size : %d%s\n", sb->size, human_size((long long)sb->size<<10)); |
b674b5b8 NB |
110 | switch(sb->level) { |
111 | case 1: ddsks=1;break; | |
112 | case 4: | |
113 | case 5: ddsks = sb->raid_disks-1; break; | |
114 | case 6: ddsks = sb->raid_disks-2; break; | |
115 | case 10: ddsks = sb->raid_disks / (sb->layout&255) / ((sb->layout>>8)&255); | |
116 | } | |
117 | if (ddsks) | |
118 | printf(" Array Size : %llu%s\n", (unsigned long long)ddsks * sb->size, | |
119 | human_size(ddsks*(long long)sb->size<<10)); | |
120 | } | |
4b1ac34b NB |
121 | printf(" Raid Devices : %d\n", sb->raid_disks); |
122 | printf(" Total Devices : %d\n", sb->nr_disks); | |
123 | printf("Preferred Minor : %d\n", sb->md_minor); | |
124 | printf("\n"); | |
b674b5b8 | 125 | if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) { |
1e0d770c | 126 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long)sb->reshape_position/2, human_size((long long)sb->reshape_position<<9)); |
b674b5b8 NB |
127 | if (sb->delta_disks) { |
128 | printf(" Delta Devices : %d", sb->delta_disks); | |
129 | if (sb->delta_disks) | |
130 | printf(" (%d->%d)\n", sb->raid_disks-sb->delta_disks, sb->raid_disks); | |
131 | else | |
132 | printf(" (%d->%d)\n", sb->raid_disks, sb->raid_disks+sb->delta_disks); | |
133 | } | |
134 | if (sb->new_level != sb->level) { | |
135 | c = map_num(pers, sb->new_level); | |
136 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
137 | } | |
138 | if (sb->new_layout != sb->layout) { | |
139 | if (sb->level == 5) { | |
140 | c = map_num(r5layout, sb->new_layout); | |
141 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
142 | } | |
143 | if (sb->level == 10) { | |
144 | printf(" New Layout : near=%d, far=%d\n", | |
145 | sb->new_layout&255, (sb->new_layout>>8)&255); | |
146 | } | |
147 | } | |
148 | if (sb->new_chunk != sb->chunk_size) | |
149 | printf(" New Chunksize : %d\n", sb->new_chunk); | |
150 | printf("\n"); | |
151 | } | |
4b1ac34b NB |
152 | atime = sb->utime; |
153 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
154 | printf(" State : %s\n", | |
155 | (sb->state&(1<<MD_SB_CLEAN))?"clean":"active"); | |
55935d51 NB |
156 | if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) |
157 | printf("Internal Bitmap : present\n"); | |
4b1ac34b NB |
158 | printf(" Active Devices : %d\n", sb->active_disks); |
159 | printf("Working Devices : %d\n", sb->working_disks); | |
160 | printf(" Failed Devices : %d\n", sb->failed_disks); | |
161 | printf(" Spare Devices : %d\n", sb->spare_disks); | |
162 | if (calc_sb0_csum(sb) == sb->sb_csum) | |
163 | printf(" Checksum : %x - correct\n", sb->sb_csum); | |
164 | else | |
165 | printf(" Checksum : %x - expected %lx\n", sb->sb_csum, calc_sb0_csum(sb)); | |
166 | printf(" Events : %d.%d\n", sb->events_hi, sb->events_lo); | |
167 | printf("\n"); | |
168 | if (sb->level == 5) { | |
169 | c = map_num(r5layout, sb->layout); | |
170 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
171 | } | |
265e0f17 NB |
172 | if (sb->level == 10) { |
173 | printf(" Layout : near=%d, far=%d\n", | |
174 | sb->layout&255, (sb->layout>>8)&255); | |
175 | } | |
4b1ac34b NB |
176 | switch(sb->level) { |
177 | case 0: | |
178 | case 4: | |
179 | case 5: | |
180 | printf(" Chunk Size : %dK\n", sb->chunk_size/1024); | |
181 | break; | |
182 | case -1: | |
183 | printf(" Rounding : %dK\n", sb->chunk_size/1024); | |
184 | break; | |
185 | default: break; | |
186 | } | |
187 | printf("\n"); | |
188 | printf(" Number Major Minor RaidDevice State\n"); | |
189 | for (d= -1; d<(signed int)(sb->raid_disks+sb->spare_disks); d++) { | |
190 | mdp_disk_t *dp; | |
191 | char *dv; | |
192 | char nb[5]; | |
dfd4d8ee | 193 | int wonly; |
4b1ac34b NB |
194 | if (d>=0) dp = &sb->disks[d]; |
195 | else dp = &sb->this_disk; | |
8f23b0b3 | 196 | snprintf(nb, sizeof(nb), "%4d", d); |
4b1ac34b NB |
197 | printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb, |
198 | dp->number, dp->major, dp->minor, dp->raid_disk); | |
dfd4d8ee NB |
199 | wonly = dp->state & (1<<MD_DISK_WRITEMOSTLY); |
200 | dp->state &= ~(1<<MD_DISK_WRITEMOSTLY); | |
4b1ac34b NB |
201 | if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty"); |
202 | if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active"); | |
203 | if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync"); | |
204 | if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed"); | |
dfd4d8ee | 205 | if (wonly) printf(" write-mostly"); |
4b1ac34b NB |
206 | if (dp->state == 0) printf(" spare"); |
207 | if ((dv=map_dev(dp->major, dp->minor))) | |
208 | printf(" %s", dv); | |
209 | printf("\n"); | |
210 | if (d == -1) printf("\n"); | |
211 | } | |
212 | } | |
213 | ||
f9ce90ba | 214 | static void brief_examine_super0(void *sbv) |
4b1ac34b NB |
215 | { |
216 | mdp_super_t *sb = sbv; | |
217 | char *c=map_num(pers, sb->level); | |
218 | ||
219 | printf("ARRAY %s level=%s num-devices=%d UUID=", | |
220 | get_md_name(sb->md_minor), | |
221 | c?c:"-unknown-", sb->raid_disks); | |
222 | if (sb->minor_version >= 90) | |
223 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
224 | sb->set_uuid2, sb->set_uuid3); | |
225 | else | |
226 | printf("%08x", sb->set_uuid0); | |
227 | printf("\n"); | |
228 | } | |
229 | ||
f9ce90ba | 230 | static void detail_super0(void *sbv) |
4b1ac34b NB |
231 | { |
232 | mdp_super_t *sb = sbv; | |
233 | printf(" UUID : "); | |
234 | if (sb->minor_version >= 90) | |
235 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
236 | sb->set_uuid2, sb->set_uuid3); | |
237 | else | |
238 | printf("%08x", sb->set_uuid0); | |
239 | printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo); | |
240 | } | |
241 | ||
f9ce90ba | 242 | static void brief_detail_super0(void *sbv) |
4b1ac34b NB |
243 | { |
244 | mdp_super_t *sb = sbv; | |
245 | printf(" UUID="); | |
246 | if (sb->minor_version >= 90) | |
247 | printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, | |
248 | sb->set_uuid2, sb->set_uuid3); | |
249 | else | |
250 | printf("%08x", sb->set_uuid0); | |
251 | } | |
c7654afc | 252 | #endif |
f9ce90ba | 253 | static void uuid_from_super0(int uuid[4], void * sbv) |
4b1ac34b NB |
254 | { |
255 | mdp_super_t *super = sbv; | |
256 | uuid[0] = super->set_uuid0; | |
257 | if (super->minor_version >= 90) { | |
258 | uuid[1] = super->set_uuid1; | |
259 | uuid[2] = super->set_uuid2; | |
260 | uuid[3] = super->set_uuid3; | |
261 | } else { | |
262 | uuid[1] = 0; | |
263 | uuid[2] = 0; | |
264 | uuid[3] = 0; | |
265 | } | |
266 | } | |
267 | ||
947fd4dd | 268 | static void getinfo_super0(struct mdinfo *info, mddev_ident_t ident, void *sbv) |
4b1ac34b NB |
269 | { |
270 | mdp_super_t *sb = sbv; | |
271 | int working = 0; | |
272 | int i; | |
273 | ||
274 | info->array.major_version = sb->major_version; | |
275 | info->array.minor_version = sb->minor_version; | |
276 | info->array.patch_version = sb->patch_version; | |
277 | info->array.raid_disks = sb->raid_disks; | |
278 | info->array.level = sb->level; | |
265e0f17 | 279 | info->array.layout = sb->layout; |
4b1ac34b NB |
280 | info->array.md_minor = sb->md_minor; |
281 | info->array.ctime = sb->ctime; | |
282 | ||
283 | info->disk.state = sb->this_disk.state; | |
284 | info->disk.major = sb->this_disk.major; | |
285 | info->disk.minor = sb->this_disk.minor; | |
286 | info->disk.raid_disk = sb->this_disk.raid_disk; | |
fbf8a0b7 | 287 | info->disk.number = sb->this_disk.number; |
4b1ac34b NB |
288 | |
289 | info->events = md_event(sb); | |
290 | ||
291 | uuid_from_super0(info->uuid, sbv); | |
947fd4dd NB |
292 | |
293 | ident->name[0] = 0; | |
4b1ac34b NB |
294 | /* work_disks is calculated rather than read directly */ |
295 | for (i=0; i < MD_SB_DISKS; i++) | |
296 | if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) && | |
297 | (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) && | |
298 | !(sb->disks[i].state & (1<<MD_DISK_FAULTY))) | |
299 | working ++; | |
300 | info->array.working_disks = working; | |
301 | } | |
302 | ||
303 | ||
f9ce90ba | 304 | static int update_super0(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose) |
4b1ac34b NB |
305 | { |
306 | int rv = 0; | |
307 | mdp_super_t *sb = sbv; | |
308 | if (strcmp(update, "sparc2.2")==0 ) { | |
309 | /* 2.2 sparc put the events in the wrong place | |
310 | * So we copy the tail of the superblock | |
311 | * up 4 bytes before continuing | |
312 | */ | |
313 | __u32 *sb32 = (__u32*)sb; | |
314 | memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, | |
315 | sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1, | |
316 | (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4); | |
dab6685f NB |
317 | if (verbose >= 0) |
318 | fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n", | |
319 | devname); | |
4b1ac34b NB |
320 | } |
321 | if (strcmp(update, "super-minor") ==0) { | |
322 | sb->md_minor = info->array.md_minor; | |
dab6685f | 323 | if (verbose > 0) |
4b1ac34b NB |
324 | fprintf(stderr, Name ": updating superblock of %s with minor number %d\n", |
325 | devname, info->array.md_minor); | |
326 | } | |
327 | if (strcmp(update, "summaries") == 0) { | |
328 | int i; | |
329 | /* set nr_disks, active_disks, working_disks, | |
330 | * failed_disks, spare_disks based on disks[] | |
331 | * array in superblock. | |
332 | * Also make sure extra slots aren't 'failed' | |
333 | */ | |
334 | sb->nr_disks = sb->active_disks = | |
335 | sb->working_disks = sb->failed_disks = | |
336 | sb->spare_disks = 0; | |
337 | for (i=0; i < MD_SB_DISKS ; i++) | |
338 | if (sb->disks[i].major || | |
339 | sb->disks[i].minor) { | |
340 | int state = sb->disks[i].state; | |
341 | if (state & (1<<MD_DISK_REMOVED)) | |
342 | continue; | |
343 | sb->nr_disks++; | |
344 | if (state & (1<<MD_DISK_ACTIVE)) | |
345 | sb->active_disks++; | |
346 | if (state & (1<<MD_DISK_FAULTY)) | |
347 | sb->failed_disks++; | |
348 | else | |
349 | sb->working_disks++; | |
350 | if (state == 0) | |
351 | sb->spare_disks++; | |
352 | } else if (i >= sb->raid_disks && sb->disks[i].number == 0) | |
353 | sb->disks[i].state = 0; | |
354 | } | |
355 | if (strcmp(update, "force")==0) { | |
356 | sb->events_hi = (info->events>>32) & 0xFFFFFFFF; | |
357 | sb->events_lo = (info->events) & 0xFFFFFFFF; | |
358 | if (sb->level == 5 || sb->level == 4 || sb->level == 6) | |
359 | /* need to force clean */ | |
360 | sb->state |= (1 << MD_SB_CLEAN); | |
361 | } | |
362 | if (strcmp(update, "assemble")==0) { | |
363 | int d = info->disk.number; | |
dfd4d8ee NB |
364 | int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY); |
365 | sb->disks[d].state &= ~(1<<MD_DISK_WRITEMOSTLY); | |
4b1ac34b | 366 | if (sb->disks[d].state != info->disk.state) { |
dfd4d8ee | 367 | sb->disks[d].state = info->disk.state & wonly; |
4b1ac34b NB |
368 | rv = 1; |
369 | } | |
370 | } | |
371 | if (strcmp(update, "newdev") == 0) { | |
372 | int d = info->disk.number; | |
373 | memset(&sb->disks[d], 0, sizeof(sb->disks[d])); | |
374 | sb->disks[d].number = d; | |
375 | sb->disks[d].major = info->disk.major; | |
376 | sb->disks[d].minor = info->disk.minor; | |
377 | sb->disks[d].raid_disk = info->disk.raid_disk; | |
378 | sb->disks[d].state = info->disk.state; | |
379 | sb->this_disk = sb->disks[d]; | |
380 | } | |
381 | if (strcmp(update, "grow") == 0) { | |
382 | sb->raid_disks = info->array.raid_disks; | |
383 | sb->nr_disks = info->array.nr_disks; | |
384 | sb->active_disks = info->array.active_disks; | |
385 | sb->working_disks = info->array.working_disks; | |
386 | memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0])); | |
387 | sb->disks[info->disk.number].number = info->disk.number; | |
388 | sb->disks[info->disk.number].major = info->disk.major; | |
389 | sb->disks[info->disk.number].minor = info->disk.minor; | |
390 | sb->disks[info->disk.number].raid_disk = info->disk.raid_disk; | |
391 | sb->disks[info->disk.number].state = info->disk.state; | |
392 | if (sb->this_disk.number == info->disk.number) | |
393 | sb->this_disk = sb->disks[info->disk.number]; | |
394 | } | |
395 | if (strcmp(update, "resync") == 0) { | |
396 | /* make sure resync happens */ | |
397 | sb->state &= ~(1<<MD_SB_CLEAN); | |
398 | sb->recovery_cp = 0; | |
399 | } | |
7d99579f NB |
400 | if (strcmp(update, "uuid") == 0) { |
401 | sb->set_uuid0 = info->uuid[0]; | |
402 | sb->set_uuid1 = info->uuid[1]; | |
403 | sb->set_uuid2 = info->uuid[2]; | |
404 | sb->set_uuid3 = info->uuid[3]; | |
405 | } | |
4b1ac34b NB |
406 | |
407 | sb->sb_csum = calc_sb0_csum(sb); | |
408 | return rv; | |
409 | } | |
410 | ||
f9ce90ba | 411 | static __u64 event_super0(void *sbv) |
4b1ac34b NB |
412 | { |
413 | mdp_super_t *sb = sbv; | |
414 | return md_event(sb); | |
415 | } | |
416 | ||
417 | ||
418 | ||
5dd497ee | 419 | static int init_super0(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *ignored_name) |
4b1ac34b | 420 | { |
55935d51 | 421 | mdp_super_t *sb = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
82d9eba6 | 422 | int spares; |
dfe47e00 | 423 | int rfd; |
55935d51 | 424 | memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b | 425 | |
f9ce90ba NB |
426 | if (info->major_version == -1) { |
427 | /* zeroing the superblock */ | |
82d9eba6 NB |
428 | return 0; |
429 | } | |
430 | ||
431 | spares = info->working_disks - info->active_disks; | |
432 | if (info->raid_disks + spares > MD_SB_DISKS) { | |
433 | fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", | |
434 | info->raid_disks , spares, MD_SB_DISKS); | |
435 | return 0; | |
f9ce90ba NB |
436 | } |
437 | ||
dfe47e00 | 438 | rfd = open("/dev/urandom", O_RDONLY); |
4b1ac34b NB |
439 | sb->md_magic = MD_SB_MAGIC; |
440 | sb->major_version = 0; | |
441 | sb->minor_version = 90; | |
442 | sb->patch_version = 0; | |
443 | sb->gvalid_words = 0; /* ignored */ | |
dfe47e00 NB |
444 | if (rfd < 0 || read(rfd, &sb->set_uuid0, 4) != 4) |
445 | sb->set_uuid0 = random(); | |
4b1ac34b NB |
446 | sb->ctime = time(0); |
447 | sb->level = info->level; | |
5dd497ee NB |
448 | if (size != info->size) |
449 | return 0; | |
4b1ac34b NB |
450 | sb->size = info->size; |
451 | sb->nr_disks = info->nr_disks; | |
452 | sb->raid_disks = info->raid_disks; | |
453 | sb->md_minor = info->md_minor; | |
454 | sb->not_persistent = 0; | |
dfe47e00 NB |
455 | if (rfd < 0 || read(rfd, &sb->set_uuid1, 12) != 12) { |
456 | sb->set_uuid1 = random(); | |
457 | sb->set_uuid2 = random(); | |
458 | sb->set_uuid3 = random(); | |
459 | } | |
460 | if (rfd >= 0) | |
461 | close(rfd); | |
4b1ac34b NB |
462 | |
463 | sb->utime = sb->ctime; | |
464 | sb->state = info->state; | |
465 | sb->active_disks = info->active_disks; | |
466 | sb->working_disks = info->working_disks; | |
467 | sb->failed_disks = info->failed_disks; | |
234a131a | 468 | sb->spare_disks = info->spare_disks; |
4b1ac34b NB |
469 | sb->events_hi = 0; |
470 | sb->events_lo = 1; | |
471 | ||
472 | sb->layout = info->layout; | |
473 | sb->chunk_size = info->chunk_size; | |
474 | ||
475 | *sbp = sb; | |
82d9eba6 | 476 | return 1; |
4b1ac34b NB |
477 | } |
478 | ||
479 | /* Add a device to the superblock being created */ | |
f9ce90ba | 480 | static void add_to_super0(void *sbv, mdu_disk_info_t *dinfo) |
4b1ac34b NB |
481 | { |
482 | mdp_super_t *sb = sbv; | |
483 | mdp_disk_t *dk = &sb->disks[dinfo->number]; | |
484 | ||
485 | dk->number = dinfo->number; | |
486 | dk->major = dinfo->major; | |
487 | dk->minor = dinfo->minor; | |
488 | dk->raid_disk = dinfo->raid_disk; | |
489 | dk->state = dinfo->state; | |
490 | } | |
491 | ||
96395475 | 492 | static int store_super0(struct supertype *st, int fd, void *sbv) |
4b1ac34b NB |
493 | { |
494 | unsigned long size; | |
495 | unsigned long long dsize; | |
496 | unsigned long long offset; | |
f9ce90ba | 497 | mdp_super_t *super = sbv; |
4b1ac34b NB |
498 | |
499 | #ifdef BLKGETSIZE64 | |
500 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
501 | #endif | |
502 | { | |
503 | if (ioctl(fd, BLKGETSIZE, &size)) | |
504 | return 1; | |
505 | else | |
506 | dsize = ((unsigned long long)size)<<9; | |
507 | } | |
508 | ||
5dd497ee | 509 | if (dsize < MD_RESERVED_SECTORS*2*512) |
4b1ac34b NB |
510 | return 2; |
511 | ||
512 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); | |
513 | ||
514 | offset *= 512; | |
515 | ||
516 | if (lseek64(fd, offset, 0)< 0LL) | |
517 | return 3; | |
518 | ||
519 | if (write(fd, super, sizeof(*super)) != sizeof(*super)) | |
520 | return 4; | |
521 | ||
570c0542 | 522 | fsync(fd); |
4b1ac34b NB |
523 | return 0; |
524 | } | |
525 | ||
1bf4e2d9 | 526 | static int write_init_super0(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname) |
4b1ac34b NB |
527 | { |
528 | mdp_super_t *sb = sbv; | |
dfd4d8ee | 529 | int fd = open(devname, O_RDWR|O_EXCL); |
4b1ac34b NB |
530 | int rv; |
531 | ||
532 | if (fd < 0) { | |
533 | fprintf(stderr, Name ": Failed to open %s to write superblock\n", devname); | |
534 | return -1; | |
535 | } | |
536 | ||
8d75b7fc NB |
537 | sb->disks[dinfo->number].state &= ~(1<<MD_DISK_FAULTY); |
538 | sb->disks[dinfo->number].state |= (1<<MD_DISK_SYNC); | |
539 | ||
4b1ac34b NB |
540 | sb->this_disk = sb->disks[dinfo->number]; |
541 | sb->sb_csum = calc_sb0_csum(sb); | |
96395475 | 542 | rv = store_super0(st, fd, sb); |
55935d51 | 543 | |
1bf4e2d9 NB |
544 | if (rv == 0 && (sb->state & (1<<MD_SB_BITMAP_PRESENT))) |
545 | rv = st->ss->write_bitmap(st, fd, sbv); | |
55935d51 | 546 | |
4b1ac34b NB |
547 | close(fd); |
548 | if (rv) | |
549 | fprintf(stderr, Name ": failed to write superblock to %s\n", devname); | |
550 | return rv; | |
551 | } | |
552 | ||
f9ce90ba | 553 | static int compare_super0(void **firstp, void *secondv) |
4b1ac34b NB |
554 | { |
555 | /* | |
556 | * return: | |
557 | * 0 same, or first was empty, and second was copied | |
558 | * 1 second had wrong number | |
559 | * 2 wrong uuid | |
560 | * 3 wrong other info | |
561 | */ | |
562 | mdp_super_t *first = *firstp; | |
563 | mdp_super_t *second = secondv; | |
564 | ||
565 | int uuid1[4], uuid2[4]; | |
566 | if (second->md_magic != MD_SB_MAGIC) | |
567 | return 1; | |
568 | if (!first) { | |
569 | first = malloc(MD_SB_BYTES); | |
570 | memcpy(first, second, MD_SB_BYTES); | |
571 | *firstp = first; | |
572 | return 0; | |
573 | } | |
574 | ||
575 | uuid_from_super0(uuid1, first); | |
576 | uuid_from_super0(uuid2, second); | |
f277ce36 | 577 | if (!same_uuid(uuid1, uuid2, 0)) |
4b1ac34b NB |
578 | return 2; |
579 | if (first->major_version != second->major_version || | |
580 | first->minor_version != second->minor_version || | |
581 | first->patch_version != second->patch_version || | |
582 | first->gvalid_words != second->gvalid_words || | |
583 | first->ctime != second->ctime || | |
584 | first->level != second->level || | |
585 | first->size != second->size || | |
586 | first->raid_disks != second->raid_disks ) | |
587 | return 3; | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | ||
82d9eba6 | 593 | static int load_super0(struct supertype *st, int fd, void **sbp, char *devname) |
4b1ac34b NB |
594 | { |
595 | /* try to read in the superblock | |
596 | * Return: | |
597 | * 0 on success | |
598 | * 1 on cannot get superblock | |
599 | * 2 on superblock meaningless | |
600 | */ | |
601 | unsigned long size; | |
602 | unsigned long long dsize; | |
603 | unsigned long long offset; | |
604 | mdp_super_t *super; | |
605 | ||
606 | #ifdef BLKGETSIZE64 | |
607 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
608 | #endif | |
609 | { | |
610 | if (ioctl(fd, BLKGETSIZE, &size)) { | |
611 | if (devname) | |
612 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
613 | devname, strerror(errno)); | |
614 | return 1; | |
615 | } else | |
616 | dsize = size << 9; | |
617 | } | |
618 | ||
619 | if (dsize < MD_RESERVED_SECTORS*2) { | |
620 | if (devname) | |
621 | fprintf(stderr, Name ": %s is too small for md: size is %ld sectors.\n", | |
622 | devname, size); | |
623 | return 1; | |
624 | } | |
625 | ||
626 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); | |
627 | ||
628 | offset *= 512; | |
629 | ||
630 | ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ | |
631 | ||
632 | if (lseek64(fd, offset, 0)< 0LL) { | |
633 | if (devname) | |
634 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
635 | devname, strerror(errno)); | |
636 | return 1; | |
637 | } | |
638 | ||
8d75b7fc | 639 | super = malloc(MD_SB_BYTES + sizeof(bitmap_super_t)); |
4b1ac34b NB |
640 | |
641 | if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) { | |
642 | if (devname) | |
643 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
644 | devname); | |
645 | free(super); | |
646 | return 1; | |
647 | } | |
648 | ||
586ed405 NB |
649 | if (st->ss && st->minor_version == 9) |
650 | super0_swap_endian(super); | |
651 | ||
4b1ac34b NB |
652 | if (super->md_magic != MD_SB_MAGIC) { |
653 | if (devname) | |
654 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
655 | devname, MD_SB_MAGIC, super->md_magic); | |
656 | free(super); | |
657 | return 2; | |
658 | } | |
659 | ||
660 | if (super->major_version != 0) { | |
661 | if (devname) | |
662 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
663 | devname, super->major_version); | |
664 | free(super); | |
665 | return 2; | |
666 | } | |
667 | *sbp = super; | |
82d9eba6 NB |
668 | if (st->ss == NULL) { |
669 | st->ss = &super0; | |
670 | st->minor_version = 90; | |
ea329559 | 671 | st->max_devs = MD_SB_DISKS; |
82d9eba6 NB |
672 | } |
673 | ||
4b1ac34b NB |
674 | return 0; |
675 | } | |
f9ce90ba | 676 | |
82d9eba6 | 677 | static struct supertype *match_metadata_desc0(char *arg) |
f9ce90ba | 678 | { |
82d9eba6 NB |
679 | struct supertype *st = malloc(sizeof(*st)); |
680 | if (!st) return st; | |
681 | ||
682 | st->ss = &super0; | |
683 | st->minor_version = 90; | |
ea329559 | 684 | st->max_devs = MD_SB_DISKS; |
f9ce90ba NB |
685 | if (strcmp(arg, "0") == 0 || |
686 | strcmp(arg, "0.90") == 0 || | |
687 | strcmp(arg, "default") == 0 | |
688 | ) | |
82d9eba6 NB |
689 | return st; |
690 | ||
586ed405 NB |
691 | st->minor_version = 9; /* flag for 'byte-swapped' */ |
692 | if (strcmp(arg, "0.swap")==0) | |
693 | return st; | |
694 | ||
82d9eba6 NB |
695 | free(st); |
696 | return NULL; | |
697 | } | |
698 | ||
1bf4e2d9 | 699 | static __u64 avail_size0(struct supertype *st, __u64 devsize) |
82d9eba6 NB |
700 | { |
701 | if (devsize < MD_RESERVED_SECTORS*2) | |
702 | return 0ULL; | |
703 | return MD_NEW_SIZE_SECTORS(devsize); | |
f9ce90ba NB |
704 | } |
705 | ||
f9c25f1d | 706 | static int add_internal_bitmap0(struct supertype *st, void *sbv, int chunk, int delay, int write_behind, unsigned long long size, int may_change, int major) |
55935d51 NB |
707 | { |
708 | /* | |
709 | * The bitmap comes immediately after the superblock and must be 60K in size | |
710 | * at most. The default size is between 30K and 60K | |
711 | * | |
712 | * size is in K, chunk is in bytes !!! | |
713 | */ | |
1bf4e2d9 | 714 | unsigned long long bits; |
55935d51 NB |
715 | unsigned long long max_bits = 60*1024*8; |
716 | unsigned long long min_chunk; | |
717 | mdp_super_t *sb = sbv; | |
718 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES); | |
719 | ||
720 | ||
f277ce36 | 721 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ |
f9c25f1d | 722 | bits = (size * 512)/ min_chunk +1; |
55935d51 NB |
723 | while (bits > max_bits) { |
724 | min_chunk *= 2; | |
725 | bits = (bits+1)/2; | |
726 | } | |
727 | if (chunk == UnSet) | |
728 | chunk = min_chunk; | |
729 | else if (chunk < min_chunk) | |
730 | return 0; /* chunk size too small */ | |
731 | ||
732 | sb->state |= (1<<MD_SB_BITMAP_PRESENT); | |
733 | ||
29e766a5 | 734 | memset(bms, 0, sizeof(*bms)); |
dfd4d8ee | 735 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
dcec9ee5 | 736 | bms->version = __cpu_to_le32(major); |
55935d51 | 737 | uuid_from_super0((int*)bms->uuid, sb); |
dfd4d8ee NB |
738 | bms->chunksize = __cpu_to_le32(chunk); |
739 | bms->daemon_sleep = __cpu_to_le32(delay); | |
f9c25f1d | 740 | bms->sync_size = __cpu_to_le64(size); |
dfd4d8ee | 741 | bms->write_behind = __cpu_to_le32(write_behind); |
55935d51 NB |
742 | |
743 | ||
8d75b7fc | 744 | |
55935d51 NB |
745 | return 1; |
746 | } | |
747 | ||
748 | ||
f6d75de8 | 749 | void locate_bitmap0(struct supertype *st, int fd, void *sbv) |
55935d51 NB |
750 | { |
751 | unsigned long long dsize; | |
752 | unsigned long size; | |
753 | unsigned long long offset; | |
754 | #ifdef BLKGETSIZE64 | |
755 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
756 | #endif | |
757 | { | |
758 | if (ioctl(fd, BLKGETSIZE, &size)) | |
759 | return; | |
760 | else | |
761 | dsize = ((unsigned long long)size)<<9; | |
762 | } | |
763 | ||
764 | if (dsize < MD_RESERVED_SECTORS*2) | |
765 | return; | |
766 | ||
767 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); | |
768 | ||
769 | offset *= 512; | |
770 | ||
771 | offset += MD_SB_BYTES; | |
772 | ||
773 | lseek64(fd, offset, 0); | |
774 | } | |
775 | ||
8d75b7fc NB |
776 | int write_bitmap0(struct supertype *st, int fd, void *sbv) |
777 | { | |
778 | unsigned long size; | |
779 | unsigned long long dsize; | |
780 | unsigned long long offset; | |
781 | mdp_super_t *sb = sbv; | |
782 | ||
783 | int rv = 0; | |
784 | ||
785 | int towrite, n; | |
786 | char buf[4096]; | |
787 | ||
788 | #ifdef BLKGETSIZE64 | |
789 | if (ioctl(fd, BLKGETSIZE64, &dsize) != 0) | |
790 | #endif | |
791 | { | |
792 | if (ioctl(fd, BLKGETSIZE, &size)) | |
793 | return 1; | |
794 | else | |
795 | dsize = ((unsigned long long)size)<<9; | |
796 | } | |
797 | ||
798 | if (dsize < MD_RESERVED_SECTORS*2) | |
799 | return -1; | |
800 | ||
801 | offset = MD_NEW_SIZE_SECTORS(dsize>>9); | |
802 | ||
803 | offset *= 512; | |
804 | ||
805 | if (lseek64(fd, offset + 4096, 0)< 0LL) | |
806 | return 3; | |
807 | ||
808 | ||
1e0d770c NB |
809 | if (write(fd, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t)) != |
810 | sizeof(bitmap_super_t)) | |
811 | return -2; | |
8d75b7fc NB |
812 | towrite = 64*1024 - MD_SB_BYTES - sizeof(bitmap_super_t); |
813 | memset(buf, 0xff, sizeof(buf)); | |
814 | while (towrite > 0) { | |
815 | n = towrite; | |
816 | if (n > sizeof(buf)) | |
817 | n = sizeof(buf); | |
818 | n = write(fd, buf, n); | |
819 | if (n > 0) | |
820 | towrite -= n; | |
821 | else | |
822 | break; | |
823 | } | |
dfd4d8ee | 824 | fsync(fd); |
8d75b7fc NB |
825 | if (towrite) |
826 | rv = -2; | |
827 | ||
828 | return rv; | |
829 | } | |
55935d51 | 830 | |
f9ce90ba | 831 | struct superswitch super0 = { |
c7654afc | 832 | #ifndef MDASSEMBLE |
f9ce90ba NB |
833 | .examine_super = examine_super0, |
834 | .brief_examine_super = brief_examine_super0, | |
835 | .detail_super = detail_super0, | |
836 | .brief_detail_super = brief_detail_super0, | |
c7654afc | 837 | #endif |
f9ce90ba NB |
838 | .uuid_from_super = uuid_from_super0, |
839 | .getinfo_super = getinfo_super0, | |
840 | .update_super = update_super0, | |
841 | .event_super = event_super0, | |
842 | .init_super = init_super0, | |
843 | .add_to_super = add_to_super0, | |
844 | .store_super = store_super0, | |
845 | .write_init_super = write_init_super0, | |
846 | .compare_super = compare_super0, | |
847 | .load_super = load_super0, | |
848 | .match_metadata_desc = match_metadata_desc0, | |
82d9eba6 | 849 | .avail_size = avail_size0, |
55935d51 NB |
850 | .add_internal_bitmap = add_internal_bitmap0, |
851 | .locate_bitmap = locate_bitmap0, | |
8d75b7fc | 852 | .write_bitmap = write_bitmap0, |
82d9eba6 | 853 | .major = 0, |
f277ce36 | 854 | .swapuuid = 0, |
f9ce90ba | 855 | }; |