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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 | #include "md_u.h" | |
27 | #include "md_p.h" | |
28 | #include <ctype.h> | |
29 | ||
30 | static int default_layout(struct supertype *st, int level, int verbose) | |
31 | { | |
32 | int layout = UnSet; | |
33 | ||
34 | if (st && st->ss->default_geometry) | |
35 | st->ss->default_geometry(st, &level, &layout, NULL); | |
36 | ||
37 | if (layout == UnSet) | |
38 | switch(level) { | |
39 | default: /* no layout */ | |
40 | layout = 0; | |
41 | break; | |
42 | case 10: | |
43 | layout = 0x102; /* near=2, far=1 */ | |
44 | if (verbose > 0) | |
45 | pr_err("layout defaults to n2\n"); | |
46 | break; | |
47 | case 5: | |
48 | case 6: | |
49 | layout = map_name(r5layout, "default"); | |
50 | if (verbose > 0) | |
51 | pr_err("layout defaults to %s\n", map_num(r5layout, layout)); | |
52 | break; | |
53 | case LEVEL_FAULTY: | |
54 | layout = map_name(faultylayout, "default"); | |
55 | ||
56 | if (verbose > 0) | |
57 | pr_err("layout defaults to %s\n", map_num(faultylayout, layout)); | |
58 | break; | |
59 | } | |
60 | ||
61 | return layout; | |
62 | } | |
63 | ||
64 | ||
65 | int Create(struct supertype *st, char *mddev, | |
66 | int chunk, int level, int layout, unsigned long long size, | |
67 | int raiddisks, int sparedisks, | |
68 | char *name, char *homehost, int *uuid, | |
69 | int subdevs, struct mddev_dev *devlist, | |
70 | int runstop, int verbose, int force, int assume_clean, | |
71 | char *bitmap_file, int bitmap_chunk, int write_behind, | |
72 | int delay, int autof) | |
73 | { | |
74 | /* | |
75 | * Create a new raid array. | |
76 | * | |
77 | * First check that necessary details are available | |
78 | * (i.e. level, raid-disks) | |
79 | * | |
80 | * Then check each disk to see what might be on it | |
81 | * and report anything interesting. | |
82 | * | |
83 | * If anything looks odd, and runstop not set, | |
84 | * abort. | |
85 | * | |
86 | * SET_ARRAY_INFO and ADD_NEW_DISK, and | |
87 | * if runstop==run, or raiddisks disks were used, | |
88 | * RUN_ARRAY | |
89 | */ | |
90 | int mdfd; | |
91 | unsigned long long minsize=0, maxsize=0; | |
92 | char *mindisc = NULL; | |
93 | char *maxdisc = NULL; | |
94 | int dnum; | |
95 | struct mddev_dev *dv; | |
96 | int fail=0, warn=0; | |
97 | struct stat stb; | |
98 | int first_missing = subdevs * 2; | |
99 | int second_missing = subdevs * 2; | |
100 | int missing_disks = 0; | |
101 | int insert_point = subdevs * 2; /* where to insert a missing drive */ | |
102 | int total_slots; | |
103 | int pass; | |
104 | int vers; | |
105 | int rv; | |
106 | int bitmap_fd; | |
107 | int have_container = 0; | |
108 | int container_fd = -1; | |
109 | int need_mdmon = 0; | |
110 | unsigned long long bitmapsize; | |
111 | struct mdinfo info, *infos; | |
112 | int did_default = 0; | |
113 | int do_default_layout = 0; | |
114 | int do_default_chunk = 0; | |
115 | unsigned long safe_mode_delay = 0; | |
116 | char chosen_name[1024]; | |
117 | struct map_ent *map = NULL; | |
118 | unsigned long long newsize; | |
119 | ||
120 | int major_num = BITMAP_MAJOR_HI; | |
121 | ||
122 | memset(&info, 0, sizeof(info)); | |
123 | if (level == UnSet && st && st->ss->default_geometry) | |
124 | st->ss->default_geometry(st, &level, NULL, NULL); | |
125 | if (level == UnSet) { | |
126 | pr_err("a RAID level is needed to create an array.\n"); | |
127 | return 1; | |
128 | } | |
129 | if (raiddisks < 4 && level == 6) { | |
130 | pr_err("at least 4 raid-devices needed for level 6\n"); | |
131 | return 1; | |
132 | } | |
133 | if (raiddisks > 256 && level == 6) { | |
134 | pr_err("no more than 256 raid-devices supported for level 6\n"); | |
135 | return 1; | |
136 | } | |
137 | if (raiddisks < 2 && level >= 4) { | |
138 | pr_err("at least 2 raid-devices needed for level 4 or 5\n"); | |
139 | return 1; | |
140 | } | |
141 | if (level <= 0 && sparedisks) { | |
142 | pr_err("This level does not support spare devices\n"); | |
143 | return 1; | |
144 | } | |
145 | ||
146 | if (subdevs == 1 && strcmp(devlist->devname, "missing") != 0) { | |
147 | /* If given a single device, it might be a container, and we can | |
148 | * extract a device list from there | |
149 | */ | |
150 | mdu_array_info_t inf; | |
151 | int fd; | |
152 | ||
153 | memset(&inf, 0, sizeof(inf)); | |
154 | fd = open(devlist->devname, O_RDONLY); | |
155 | if (fd >= 0 && | |
156 | ioctl(fd, GET_ARRAY_INFO, &inf) == 0 && | |
157 | inf.raid_disks == 0) { | |
158 | /* yep, looks like a container */ | |
159 | if (st) { | |
160 | rv = st->ss->load_container(st, fd, | |
161 | devlist->devname); | |
162 | if (rv == 0) | |
163 | have_container = 1; | |
164 | } else { | |
165 | st = super_by_fd(fd, NULL); | |
166 | if (st && !(rv = st->ss-> | |
167 | load_container(st, fd, | |
168 | devlist->devname))) | |
169 | have_container = 1; | |
170 | else | |
171 | st = NULL; | |
172 | } | |
173 | if (have_container) { | |
174 | subdevs = raiddisks; | |
175 | first_missing = subdevs * 2; | |
176 | second_missing = subdevs * 2; | |
177 | insert_point = subdevs * 2; | |
178 | } | |
179 | } | |
180 | if (fd >= 0) | |
181 | close(fd); | |
182 | } | |
183 | if (st && st->ss->external && sparedisks) { | |
184 | pr_err("This metadata type does not support " | |
185 | "spare disks at create time\n"); | |
186 | return 1; | |
187 | } | |
188 | if (subdevs > raiddisks+sparedisks) { | |
189 | pr_err("You have listed more devices (%d) than are in the array(%d)!\n", subdevs, raiddisks+sparedisks); | |
190 | return 1; | |
191 | } | |
192 | if (!have_container && subdevs < raiddisks+sparedisks) { | |
193 | pr_err("You haven't given enough devices (real or missing) to create this array\n"); | |
194 | return 1; | |
195 | } | |
196 | if (bitmap_file && level <= 0) { | |
197 | pr_err("bitmaps not meaningful with level %s\n", | |
198 | map_num(pers, level)?:"given"); | |
199 | return 1; | |
200 | } | |
201 | ||
202 | /* now set some defaults */ | |
203 | ||
204 | ||
205 | if (layout == UnSet) { | |
206 | do_default_layout = 1; | |
207 | layout = default_layout(st, level, verbose); | |
208 | } | |
209 | ||
210 | if (level == 10) | |
211 | /* check layout fits in array*/ | |
212 | if ((layout&255) * ((layout>>8)&255) > raiddisks) { | |
213 | pr_err("that layout requires at least %d devices\n", | |
214 | (layout&255) * ((layout>>8)&255)); | |
215 | return 1; | |
216 | } | |
217 | ||
218 | switch(level) { | |
219 | case 4: | |
220 | case 5: | |
221 | case 10: | |
222 | case 6: | |
223 | case 0: | |
224 | if (chunk == 0 || chunk == UnSet) { | |
225 | chunk = UnSet; | |
226 | do_default_chunk = 1; | |
227 | /* chunk will be set later */ | |
228 | } | |
229 | break; | |
230 | case LEVEL_LINEAR: | |
231 | /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */ | |
232 | if (get_linux_version() < 2006016 && chunk == 0) { | |
233 | chunk = 64; | |
234 | if (verbose > 0) | |
235 | pr_err("chunk size defaults to 64K\n"); | |
236 | } | |
237 | break; | |
238 | case 1: | |
239 | case LEVEL_FAULTY: | |
240 | case LEVEL_MULTIPATH: | |
241 | case LEVEL_CONTAINER: | |
242 | if (chunk) { | |
243 | chunk = 0; | |
244 | if (verbose > 0) | |
245 | pr_err("chunk size ignored for this level\n"); | |
246 | } | |
247 | break; | |
248 | default: | |
249 | pr_err("unknown level %d\n", level); | |
250 | return 1; | |
251 | } | |
252 | ||
253 | if (size && chunk && chunk != UnSet) | |
254 | size &= ~(unsigned long long)(chunk - 1); | |
255 | newsize = size * 2; | |
256 | if (st && ! st->ss->validate_geometry(st, level, layout, raiddisks, | |
257 | &chunk, size*2, NULL, &newsize, verbose>=0)) | |
258 | return 1; | |
259 | ||
260 | if (chunk && chunk != UnSet) { | |
261 | newsize &= ~(unsigned long long)(chunk*2 - 1); | |
262 | if (do_default_chunk) { | |
263 | /* default chunk was just set */ | |
264 | if (verbose > 0) | |
265 | pr_err("chunk size " | |
266 | "defaults to %dK\n", chunk); | |
267 | size &= ~(unsigned long long)(chunk - 1); | |
268 | do_default_chunk = 0; | |
269 | } | |
270 | } | |
271 | ||
272 | if (size == 0) { | |
273 | size = newsize / 2; | |
274 | if (level == 1) | |
275 | /* If this is ever reshaped to RAID5, we will | |
276 | * need a chunksize. So round it off a bit | |
277 | * now just to be safe | |
278 | */ | |
279 | size &= ~(64ULL-1); | |
280 | ||
281 | if (size && verbose > 0) | |
282 | pr_err("setting size to %lluK\n", | |
283 | (unsigned long long)size); | |
284 | } | |
285 | ||
286 | /* now look at the subdevs */ | |
287 | info.array.active_disks = 0; | |
288 | info.array.working_disks = 0; | |
289 | dnum = 0; | |
290 | for (dv=devlist; dv && !have_container; dv=dv->next, dnum++) { | |
291 | char *dname = dv->devname; | |
292 | unsigned long long freesize; | |
293 | int dfd; | |
294 | ||
295 | if (strcasecmp(dname, "missing")==0) { | |
296 | if (first_missing > dnum) | |
297 | first_missing = dnum; | |
298 | if (second_missing > dnum && dnum > first_missing) | |
299 | second_missing = dnum; | |
300 | missing_disks ++; | |
301 | continue; | |
302 | } | |
303 | dfd = open(dname, O_RDONLY); | |
304 | if (dfd < 0) { | |
305 | pr_err("cannot open %s: %s\n", | |
306 | dname, strerror(errno)); | |
307 | exit(2); | |
308 | } | |
309 | if (fstat(dfd, &stb) != 0 || | |
310 | (stb.st_mode & S_IFMT) != S_IFBLK) { | |
311 | close(dfd); | |
312 | pr_err("%s is not a block device\n", | |
313 | dname); | |
314 | exit(2); | |
315 | } | |
316 | close(dfd); | |
317 | info.array.working_disks++; | |
318 | if (dnum < raiddisks) | |
319 | info.array.active_disks++; | |
320 | if (st == NULL) { | |
321 | struct createinfo *ci = conf_get_create_info(); | |
322 | if (ci) | |
323 | st = ci->supertype; | |
324 | } | |
325 | if (st == NULL) { | |
326 | /* Need to choose a default metadata, which is different | |
327 | * depending on geometry of array. | |
328 | */ | |
329 | int i; | |
330 | char *name = "default"; | |
331 | for(i=0; !st && superlist[i]; i++) { | |
332 | st = superlist[i]->match_metadata_desc(name); | |
333 | if (!st) | |
334 | continue; | |
335 | if (do_default_layout) | |
336 | layout = default_layout(st, level, verbose); | |
337 | switch (st->ss->validate_geometry( | |
338 | st, level, layout, raiddisks, | |
339 | &chunk, size*2, dname, &freesize, | |
340 | verbose > 0)) { | |
341 | case -1: /* Not valid, message printed, and not | |
342 | * worth checking any further */ | |
343 | exit(2); | |
344 | break; | |
345 | case 0: /* Geometry not valid */ | |
346 | free(st); | |
347 | st = NULL; | |
348 | chunk = do_default_chunk ? UnSet : chunk; | |
349 | break; | |
350 | case 1: /* All happy */ | |
351 | break; | |
352 | } | |
353 | } | |
354 | ||
355 | if (!st) { | |
356 | int dfd = open(dname, O_RDONLY|O_EXCL); | |
357 | if (dfd < 0) { | |
358 | pr_err("cannot open %s: %s\n", | |
359 | dname, strerror(errno)); | |
360 | exit(2); | |
361 | } | |
362 | pr_err("device %s not suitable " | |
363 | "for any style of array\n", | |
364 | dname); | |
365 | exit(2); | |
366 | } | |
367 | if (st->ss != &super0 || | |
368 | st->minor_version != 90) | |
369 | did_default = 1; | |
370 | } else { | |
371 | if (do_default_layout) | |
372 | layout = default_layout(st, level, 0); | |
373 | if (!st->ss->validate_geometry(st, level, layout, | |
374 | raiddisks, | |
375 | &chunk, size*2, dname, | |
376 | &freesize, | |
377 | verbose >= 0)) { | |
378 | ||
379 | pr_err("%s is not suitable for " | |
380 | "this array.\n", | |
381 | dname); | |
382 | fail = 1; | |
383 | continue; | |
384 | } | |
385 | } | |
386 | ||
387 | freesize /= 2; /* convert to K */ | |
388 | if (chunk && chunk != UnSet) { | |
389 | /* round to chunk size */ | |
390 | freesize = freesize & ~(chunk-1); | |
391 | if (do_default_chunk) { | |
392 | /* default chunk was just set */ | |
393 | if (verbose > 0) | |
394 | pr_err("chunk size " | |
395 | "defaults to %dK\n", chunk); | |
396 | size &= ~(unsigned long long)(chunk - 1); | |
397 | do_default_chunk = 0; | |
398 | } | |
399 | } | |
400 | ||
401 | if (size && freesize < size) { | |
402 | pr_err("%s is smaller than given size." | |
403 | " %lluK < %lluK + metadata\n", | |
404 | dname, freesize, size); | |
405 | fail = 1; | |
406 | continue; | |
407 | } | |
408 | if (maxdisc == NULL || (maxdisc && freesize > maxsize)) { | |
409 | maxdisc = dname; | |
410 | maxsize = freesize; | |
411 | } | |
412 | if (mindisc ==NULL || (mindisc && freesize < minsize)) { | |
413 | mindisc = dname; | |
414 | minsize = freesize; | |
415 | } | |
416 | if (runstop != 1 || verbose >= 0) { | |
417 | int fd = open(dname, O_RDONLY); | |
418 | if (fd <0 ) { | |
419 | pr_err("Cannot open %s: %s\n", | |
420 | dname, strerror(errno)); | |
421 | fail=1; | |
422 | continue; | |
423 | } | |
424 | warn |= check_ext2(fd, dname); | |
425 | warn |= check_reiser(fd, dname); | |
426 | warn |= check_raid(fd, dname); | |
427 | if (strcmp(st->ss->name, "1.x") == 0 && | |
428 | st->minor_version >= 1) | |
429 | /* metadata at front */ | |
430 | warn |= check_partitions(fd, dname, 0, 0); | |
431 | else if (level == 1 || level == LEVEL_CONTAINER | |
432 | || (level == 0 && raiddisks == 1)) | |
433 | /* partitions could be meaningful */ | |
434 | warn |= check_partitions(fd, dname, freesize*2, size*2); | |
435 | else | |
436 | /* partitions cannot be meaningful */ | |
437 | warn |= check_partitions(fd, dname, 0, 0); | |
438 | if (strcmp(st->ss->name, "1.x") == 0 && | |
439 | st->minor_version >= 1 && | |
440 | did_default && | |
441 | level == 1 && | |
442 | (warn & 1024) == 0) { | |
443 | warn |= 1024; | |
444 | pr_err("Note: this array has metadata at the start and\n" | |
445 | " may not be suitable as a boot device. If you plan to\n" | |
446 | " store '/boot' on this device please ensure that\n" | |
447 | " your boot-loader understands md/v1.x metadata, or use\n" | |
448 | " --metadata=0.90\n"); | |
449 | } | |
450 | close(fd); | |
451 | } | |
452 | } | |
453 | if (raiddisks + sparedisks > st->max_devs) { | |
454 | pr_err("Too many devices:" | |
455 | " %s metadata only supports %d\n", | |
456 | st->ss->name, st->max_devs); | |
457 | return 1; | |
458 | } | |
459 | if (have_container) | |
460 | info.array.working_disks = raiddisks; | |
461 | if (fail) { | |
462 | pr_err("create aborted\n"); | |
463 | return 1; | |
464 | } | |
465 | if (size == 0) { | |
466 | if (mindisc == NULL && !have_container) { | |
467 | pr_err("no size and no drives given - aborting create.\n"); | |
468 | return 1; | |
469 | } | |
470 | if (level > 0 || level == LEVEL_MULTIPATH | |
471 | || level == LEVEL_FAULTY | |
472 | || st->ss->external ) { | |
473 | /* size is meaningful */ | |
474 | if (!st->ss->validate_geometry(st, level, layout, | |
475 | raiddisks, | |
476 | &chunk, minsize*2, | |
477 | NULL, NULL, 0)) { | |
478 | pr_err("devices too large for RAID level %d\n", level); | |
479 | return 1; | |
480 | } | |
481 | size = minsize; | |
482 | if (level == 1) | |
483 | /* If this is ever reshaped to RAID5, we will | |
484 | * need a chunksize. So round it off a bit | |
485 | * now just to be safe | |
486 | */ | |
487 | size &= ~(64ULL-1); | |
488 | if (verbose > 0) | |
489 | pr_err("size set to %lluK\n", size); | |
490 | } | |
491 | } | |
492 | if (!have_container && level > 0 && ((maxsize-size)*100 > maxsize)) { | |
493 | if (runstop != 1 || verbose >= 0) | |
494 | pr_err("largest drive (%s) exceeds size (%lluK) by more than 1%%\n", | |
495 | maxdisc, size); | |
496 | warn = 1; | |
497 | } | |
498 | ||
499 | if (st->ss->detail_platform && st->ss->detail_platform(0, 1) != 0) { | |
500 | if (runstop != 1 || verbose >= 0) | |
501 | pr_err("%s unable to enumerate platform support\n" | |
502 | " array may not be compatible with hardware/firmware\n", | |
503 | st->ss->name); | |
504 | warn = 1; | |
505 | } | |
506 | ||
507 | if (warn) { | |
508 | if (runstop!= 1) { | |
509 | if (!ask("Continue creating array? ")) { | |
510 | pr_err("create aborted.\n"); | |
511 | return 1; | |
512 | } | |
513 | } else { | |
514 | if (verbose > 0) | |
515 | pr_err("creation continuing despite oddities due to --run\n"); | |
516 | } | |
517 | } | |
518 | ||
519 | /* If this is raid4/5, we want to configure the last active slot | |
520 | * as missing, so that a reconstruct happens (faster than re-parity) | |
521 | * FIX: Can we do this for raid6 as well? | |
522 | */ | |
523 | if (st->ss->external == 0 && | |
524 | assume_clean==0 && force == 0 && first_missing >= raiddisks) { | |
525 | switch ( level ) { | |
526 | case 4: | |
527 | case 5: | |
528 | insert_point = raiddisks-1; | |
529 | sparedisks++; | |
530 | info.array.active_disks--; | |
531 | missing_disks++; | |
532 | break; | |
533 | default: | |
534 | break; | |
535 | } | |
536 | } | |
537 | /* For raid6, if creating with 1 missing drive, make a good drive | |
538 | * into a spare, else the create will fail | |
539 | */ | |
540 | if (assume_clean == 0 && force == 0 && first_missing < raiddisks && | |
541 | st->ss->external == 0 && | |
542 | second_missing >= raiddisks && level == 6) { | |
543 | insert_point = raiddisks - 1; | |
544 | if (insert_point == first_missing) | |
545 | insert_point--; | |
546 | sparedisks ++; | |
547 | info.array.active_disks--; | |
548 | missing_disks++; | |
549 | } | |
550 | ||
551 | if (level <= 0 && first_missing < subdevs * 2) { | |
552 | pr_err("This level does not support missing devices\n"); | |
553 | return 1; | |
554 | } | |
555 | ||
556 | /* We need to create the device */ | |
557 | map_lock(&map); | |
558 | mdfd = create_mddev(mddev, name, autof, LOCAL, chosen_name); | |
559 | if (mdfd < 0) { | |
560 | map_unlock(&map); | |
561 | return 1; | |
562 | } | |
563 | /* verify if chosen_name is not in use, | |
564 | * it could be in conflict with already existing device | |
565 | * e.g. container, array | |
566 | */ | |
567 | if (strncmp(chosen_name, "/dev/md/", 8) == 0 | |
568 | && map_by_name(&map, chosen_name+8) != NULL) { | |
569 | pr_err("Array name %s is in use already.\n", | |
570 | chosen_name); | |
571 | close(mdfd); | |
572 | map_unlock(&map); | |
573 | return 1; | |
574 | } | |
575 | mddev = chosen_name; | |
576 | ||
577 | vers = md_get_version(mdfd); | |
578 | if (vers < 9000) { | |
579 | pr_err("Create requires md driver version 0.90.0 or later\n"); | |
580 | goto abort_locked; | |
581 | } else { | |
582 | mdu_array_info_t inf; | |
583 | memset(&inf, 0, sizeof(inf)); | |
584 | ioctl(mdfd, GET_ARRAY_INFO, &inf); | |
585 | if (inf.working_disks != 0) { | |
586 | pr_err("another array by this name" | |
587 | " is already running.\n"); | |
588 | goto abort_locked; | |
589 | } | |
590 | } | |
591 | ||
592 | /* Ok, lets try some ioctls */ | |
593 | ||
594 | info.array.level = level; | |
595 | info.array.size = size; | |
596 | info.array.raid_disks = raiddisks; | |
597 | /* The kernel should *know* what md_minor we are dealing | |
598 | * with, but it chooses to trust me instead. Sigh | |
599 | */ | |
600 | info.array.md_minor = 0; | |
601 | if (fstat(mdfd, &stb)==0) | |
602 | info.array.md_minor = minor(stb.st_rdev); | |
603 | info.array.not_persistent = 0; | |
604 | ||
605 | if ( ( (level == 4 || level == 5) && | |
606 | (insert_point < raiddisks || first_missing < raiddisks) ) | |
607 | || | |
608 | ( level == 6 && (insert_point < raiddisks | |
609 | || second_missing < raiddisks)) | |
610 | || | |
611 | ( level <= 0 ) | |
612 | || | |
613 | assume_clean | |
614 | ) { | |
615 | info.array.state = 1; /* clean, but one+ drive will be missing*/ | |
616 | info.resync_start = MaxSector; | |
617 | } else { | |
618 | info.array.state = 0; /* not clean, but no errors */ | |
619 | info.resync_start = 0; | |
620 | } | |
621 | if (level == 10) { | |
622 | /* for raid10, the bitmap size is the capacity of the array, | |
623 | * which is array.size * raid_disks / ncopies; | |
624 | * .. but convert to sectors. | |
625 | */ | |
626 | int ncopies = ((layout>>8) & 255) * (layout & 255); | |
627 | bitmapsize = (unsigned long long)size * raiddisks / ncopies * 2; | |
628 | /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, size, raiddisks, ncopies);*/ | |
629 | } else | |
630 | bitmapsize = (unsigned long long)size * 2; | |
631 | ||
632 | /* There is lots of redundancy in these disk counts, | |
633 | * raid_disks is the most meaningful value | |
634 | * it describes the geometry of the array | |
635 | * it is constant | |
636 | * nr_disks is total number of used slots. | |
637 | * it should be raid_disks+spare_disks | |
638 | * spare_disks is the number of extra disks present | |
639 | * see above | |
640 | * active_disks is the number of working disks in | |
641 | * active slots. (With raid_disks) | |
642 | * working_disks is the total number of working disks, | |
643 | * including spares | |
644 | * failed_disks is the number of disks marked failed | |
645 | * | |
646 | * Ideally, the kernel would keep these (except raid_disks) | |
647 | * up-to-date as we ADD_NEW_DISK, but it doesn't (yet). | |
648 | * So for now, we assume that all raid and spare | |
649 | * devices will be given. | |
650 | */ | |
651 | info.array.spare_disks=sparedisks; | |
652 | info.array.failed_disks=missing_disks; | |
653 | info.array.nr_disks = info.array.working_disks | |
654 | + info.array.failed_disks; | |
655 | info.array.layout = layout; | |
656 | info.array.chunk_size = chunk*1024; | |
657 | ||
658 | if (name == NULL || *name == 0) { | |
659 | /* base name on mddev */ | |
660 | /* /dev/md0 -> 0 | |
661 | * /dev/md_d0 -> d0 | |
662 | * /dev/md/1 -> 1 | |
663 | * /dev/md/d1 -> d1 | |
664 | * /dev/md/home -> home | |
665 | * /dev/mdhome -> home | |
666 | */ | |
667 | /* FIXME compare this with rules in create_mddev */ | |
668 | name = strrchr(mddev, '/'); | |
669 | if (name) { | |
670 | name++; | |
671 | if (strncmp(name, "md_d", 4)==0 && | |
672 | strlen(name) > 4 && | |
673 | isdigit(name[4]) && | |
674 | (name-mddev) == 5 /* /dev/ */) | |
675 | name += 3; | |
676 | else if (strncmp(name, "md", 2)==0 && | |
677 | strlen(name) > 2 && | |
678 | isdigit(name[2]) && | |
679 | (name-mddev) == 5 /* /dev/ */) | |
680 | name += 2; | |
681 | } | |
682 | } | |
683 | if (!st->ss->init_super(st, &info.array, size, name, homehost, uuid)) | |
684 | goto abort_locked; | |
685 | ||
686 | total_slots = info.array.nr_disks; | |
687 | st->ss->getinfo_super(st, &info, NULL); | |
688 | sysfs_init(&info, mdfd, 0); | |
689 | ||
690 | if (did_default && verbose >= 0) { | |
691 | if (is_subarray(info.text_version)) { | |
692 | int dnum = devname2devnum(info.text_version+1); | |
693 | char *path; | |
694 | int mdp = get_mdp_major(); | |
695 | struct mdinfo *mdi; | |
696 | if (dnum > 0) | |
697 | path = map_dev(MD_MAJOR, dnum, 1); | |
698 | else | |
699 | path = map_dev(mdp, (-1-dnum)<< 6, 1); | |
700 | ||
701 | mdi = sysfs_read(-1, dnum, GET_VERSION); | |
702 | ||
703 | pr_err("Creating array inside " | |
704 | "%s container %s\n", | |
705 | mdi?mdi->text_version:"managed", path); | |
706 | sysfs_free(mdi); | |
707 | } else | |
708 | pr_err("Defaulting to version" | |
709 | " %s metadata\n", info.text_version); | |
710 | } | |
711 | ||
712 | map_update(&map, fd2devnum(mdfd), info.text_version, | |
713 | info.uuid, chosen_name); | |
714 | map_unlock(&map); | |
715 | ||
716 | if (bitmap_file && vers < 9003) { | |
717 | major_num = BITMAP_MAJOR_HOSTENDIAN; | |
718 | #ifdef __BIG_ENDIAN | |
719 | pr_err("Warning - bitmaps created on this kernel are not portable\n" | |
720 | " between different architectured. Consider upgrading the Linux kernel.\n"); | |
721 | #endif | |
722 | } | |
723 | ||
724 | if (bitmap_file && strcmp(bitmap_file, "internal")==0) { | |
725 | if ((vers%100) < 2) { | |
726 | pr_err("internal bitmaps not supported by this kernel.\n"); | |
727 | goto abort; | |
728 | } | |
729 | if (!st->ss->add_internal_bitmap) { | |
730 | pr_err("internal bitmaps not supported with %s metadata\n", | |
731 | st->ss->name); | |
732 | goto abort; | |
733 | } | |
734 | if (!st->ss->add_internal_bitmap(st, &bitmap_chunk, | |
735 | delay, write_behind, | |
736 | bitmapsize, 1, major_num)) { | |
737 | pr_err("Given bitmap chunk size not supported.\n"); | |
738 | goto abort; | |
739 | } | |
740 | bitmap_file = NULL; | |
741 | } | |
742 | ||
743 | ||
744 | sysfs_init(&info, mdfd, 0); | |
745 | ||
746 | if (st->ss->external && st->container_dev != NoMdDev) { | |
747 | /* member */ | |
748 | ||
749 | /* When creating a member, we need to be careful | |
750 | * to negotiate with mdmon properly. | |
751 | * If it is already running, we cannot write to | |
752 | * the devices and must ask it to do that part. | |
753 | * If it isn't running, we write to the devices, | |
754 | * and then start it. | |
755 | * We hold an exclusive open on the container | |
756 | * device to make sure mdmon doesn't exit after | |
757 | * we checked that it is running. | |
758 | * | |
759 | * For now, fail if it is already running. | |
760 | */ | |
761 | container_fd = open_dev_excl(st->container_dev); | |
762 | if (container_fd < 0) { | |
763 | pr_err("Cannot get exclusive " | |
764 | "open on container - weird.\n"); | |
765 | goto abort; | |
766 | } | |
767 | if (mdmon_running(st->container_dev)) { | |
768 | if (verbose) | |
769 | pr_err("reusing mdmon " | |
770 | "for %s.\n", | |
771 | devnum2devname(st->container_dev)); | |
772 | st->update_tail = &st->updates; | |
773 | } else | |
774 | need_mdmon = 1; | |
775 | } | |
776 | rv = set_array_info(mdfd, st, &info); | |
777 | if (rv) { | |
778 | pr_err("failed to set array info for %s: %s\n", | |
779 | mddev, strerror(errno)); | |
780 | goto abort; | |
781 | } | |
782 | ||
783 | if (bitmap_file) { | |
784 | int uuid[4]; | |
785 | ||
786 | st->ss->uuid_from_super(st, uuid); | |
787 | if (CreateBitmap(bitmap_file, force, (char*)uuid, bitmap_chunk, | |
788 | delay, write_behind, | |
789 | bitmapsize, | |
790 | major_num)) { | |
791 | goto abort; | |
792 | } | |
793 | bitmap_fd = open(bitmap_file, O_RDWR); | |
794 | if (bitmap_fd < 0) { | |
795 | pr_err("weird: %s cannot be openned\n", | |
796 | bitmap_file); | |
797 | goto abort; | |
798 | } | |
799 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
800 | pr_err("Cannot set bitmap file for %s: %s\n", | |
801 | mddev, strerror(errno)); | |
802 | goto abort; | |
803 | } | |
804 | } | |
805 | ||
806 | infos = malloc(sizeof(*infos) * total_slots); | |
807 | if (!infos) { | |
808 | pr_err("Unable to allocate memory\n"); | |
809 | goto abort; | |
810 | } | |
811 | ||
812 | for (pass=1; pass <=2 ; pass++) { | |
813 | struct mddev_dev *moved_disk = NULL; /* the disk that was moved out of the insert point */ | |
814 | ||
815 | for (dnum=0, dv = devlist ; dv ; | |
816 | dv=(dv->next)?(dv->next):moved_disk, dnum++) { | |
817 | int fd; | |
818 | struct stat stb; | |
819 | struct mdinfo *inf = &infos[dnum]; | |
820 | ||
821 | if (dnum >= total_slots) | |
822 | abort(); | |
823 | if (dnum == insert_point) { | |
824 | moved_disk = dv; | |
825 | continue; | |
826 | } | |
827 | if (strcasecmp(dv->devname, "missing")==0) | |
828 | continue; | |
829 | if (have_container) | |
830 | moved_disk = NULL; | |
831 | if (have_container && dnum < info.array.raid_disks - 1) | |
832 | /* repeatedly use the container */ | |
833 | moved_disk = dv; | |
834 | ||
835 | switch(pass) { | |
836 | case 1: | |
837 | *inf = info; | |
838 | ||
839 | inf->disk.number = dnum; | |
840 | inf->disk.raid_disk = dnum; | |
841 | if (inf->disk.raid_disk < raiddisks) | |
842 | inf->disk.state = (1<<MD_DISK_ACTIVE) | | |
843 | (1<<MD_DISK_SYNC); | |
844 | else | |
845 | inf->disk.state = 0; | |
846 | ||
847 | if (dv->writemostly == 1) | |
848 | inf->disk.state |= (1<<MD_DISK_WRITEMOSTLY); | |
849 | ||
850 | if (have_container) | |
851 | fd = -1; | |
852 | else { | |
853 | if (st->ss->external && | |
854 | st->container_dev != NoMdDev) | |
855 | fd = open(dv->devname, O_RDWR); | |
856 | else | |
857 | fd = open(dv->devname, O_RDWR|O_EXCL); | |
858 | ||
859 | if (fd < 0) { | |
860 | pr_err("failed to open %s " | |
861 | "after earlier success - aborting\n", | |
862 | dv->devname); | |
863 | goto abort; | |
864 | } | |
865 | fstat(fd, &stb); | |
866 | inf->disk.major = major(stb.st_rdev); | |
867 | inf->disk.minor = minor(stb.st_rdev); | |
868 | } | |
869 | if (fd >= 0) | |
870 | remove_partitions(fd); | |
871 | if (st->ss->add_to_super(st, &inf->disk, | |
872 | fd, dv->devname)) { | |
873 | ioctl(mdfd, STOP_ARRAY, NULL); | |
874 | goto abort; | |
875 | } | |
876 | st->ss->getinfo_super(st, inf, NULL); | |
877 | safe_mode_delay = inf->safe_mode_delay; | |
878 | ||
879 | if (have_container && verbose > 0) | |
880 | pr_err("Using %s for device %d\n", | |
881 | map_dev(inf->disk.major, | |
882 | inf->disk.minor, | |
883 | 0), dnum); | |
884 | ||
885 | if (!have_container) { | |
886 | /* getinfo_super might have lost these ... */ | |
887 | inf->disk.major = major(stb.st_rdev); | |
888 | inf->disk.minor = minor(stb.st_rdev); | |
889 | } | |
890 | break; | |
891 | case 2: | |
892 | inf->errors = 0; | |
893 | ||
894 | rv = add_disk(mdfd, st, &info, inf); | |
895 | ||
896 | if (rv) { | |
897 | pr_err("ADD_NEW_DISK for %s " | |
898 | "failed: %s\n", | |
899 | dv->devname, strerror(errno)); | |
900 | goto abort; | |
901 | } | |
902 | break; | |
903 | } | |
904 | if (!have_container && | |
905 | dv == moved_disk && dnum != insert_point) break; | |
906 | } | |
907 | if (pass == 1) { | |
908 | struct mdinfo info_new; | |
909 | struct map_ent *me = NULL; | |
910 | ||
911 | /* check to see if the uuid has changed due to these | |
912 | * metadata changes, and if so update the member array | |
913 | * and container uuid. Note ->write_init_super clears | |
914 | * the subarray cursor such that ->getinfo_super once | |
915 | * again returns container info. | |
916 | */ | |
917 | map_lock(&map); | |
918 | st->ss->getinfo_super(st, &info_new, NULL); | |
919 | if (st->ss->external && level != LEVEL_CONTAINER && | |
920 | !same_uuid(info_new.uuid, info.uuid, 0)) { | |
921 | map_update(&map, fd2devnum(mdfd), | |
922 | info_new.text_version, | |
923 | info_new.uuid, chosen_name); | |
924 | me = map_by_devnum(&map, st->container_dev); | |
925 | } | |
926 | ||
927 | if (st->ss->write_init_super(st)) { | |
928 | st->ss->free_super(st); | |
929 | goto abort_locked; | |
930 | } | |
931 | ||
932 | /* update parent container uuid */ | |
933 | if (me) { | |
934 | char *path = strdup(me->path); | |
935 | ||
936 | st->ss->getinfo_super(st, &info_new, NULL); | |
937 | map_update(&map, st->container_dev, | |
938 | info_new.text_version, | |
939 | info_new.uuid, path); | |
940 | free(path); | |
941 | } | |
942 | map_unlock(&map); | |
943 | ||
944 | flush_metadata_updates(st); | |
945 | st->ss->free_super(st); | |
946 | } | |
947 | } | |
948 | free(infos); | |
949 | ||
950 | if (level == LEVEL_CONTAINER) { | |
951 | /* No need to start. But we should signal udev to | |
952 | * create links */ | |
953 | sysfs_uevent(&info, "change"); | |
954 | if (verbose >= 0) | |
955 | pr_err("container %s prepared.\n", mddev); | |
956 | wait_for(chosen_name, mdfd); | |
957 | } else if (runstop == 1 || subdevs >= raiddisks) { | |
958 | if (st->ss->external) { | |
959 | int err; | |
960 | switch(level) { | |
961 | case LEVEL_LINEAR: | |
962 | case LEVEL_MULTIPATH: | |
963 | case 0: | |
964 | err = sysfs_set_str(&info, NULL, "array_state", | |
965 | "active"); | |
966 | need_mdmon = 0; | |
967 | break; | |
968 | default: | |
969 | err = sysfs_set_str(&info, NULL, "array_state", | |
970 | "readonly"); | |
971 | break; | |
972 | } | |
973 | sysfs_set_safemode(&info, safe_mode_delay); | |
974 | if (err) { | |
975 | pr_err("failed to" | |
976 | " activate array.\n"); | |
977 | ioctl(mdfd, STOP_ARRAY, NULL); | |
978 | goto abort; | |
979 | } | |
980 | } else { | |
981 | /* param is not actually used */ | |
982 | mdu_param_t param; | |
983 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { | |
984 | pr_err("RUN_ARRAY failed: %s\n", | |
985 | strerror(errno)); | |
986 | if (info.array.chunk_size & (info.array.chunk_size-1)) { | |
987 | cont_err("Problem may be that " | |
988 | "chunk size is not a power of 2\n"); | |
989 | } | |
990 | ioctl(mdfd, STOP_ARRAY, NULL); | |
991 | goto abort; | |
992 | } | |
993 | } | |
994 | if (verbose >= 0) | |
995 | pr_err("array %s started.\n", mddev); | |
996 | if (st->ss->external && st->container_dev != NoMdDev) { | |
997 | if (need_mdmon) | |
998 | start_mdmon(st->container_dev); | |
999 | ||
1000 | ping_monitor_by_id(st->container_dev); | |
1001 | close(container_fd); | |
1002 | } | |
1003 | wait_for(chosen_name, mdfd); | |
1004 | } else { | |
1005 | pr_err("not starting array - not enough devices.\n"); | |
1006 | } | |
1007 | close(mdfd); | |
1008 | return 0; | |
1009 | ||
1010 | abort: | |
1011 | map_lock(&map); | |
1012 | abort_locked: | |
1013 | map_remove(&map, fd2devnum(mdfd)); | |
1014 | map_unlock(&map); | |
1015 | ||
1016 | if (mdfd >= 0) | |
1017 | close(mdfd); | |
1018 | return 1; | |
1019 | } |