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Commit | Line | Data |
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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
e736b623 | 4 | * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de> |
64c4757e NB |
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 | |
e736b623 | 22 | * Email: <neilb@suse.de> |
64c4757e NB |
23 | */ |
24 | ||
9a9dab36 | 25 | #include "mdadm.h" |
682c7051 NB |
26 | #include "md_u.h" |
27 | #include "md_p.h" | |
60248f74 | 28 | #include <ctype.h> |
64c4757e | 29 | |
a18a888e DW |
30 | static int default_layout(struct supertype *st, int level, int verbose) |
31 | { | |
32 | int layout = UnSet; | |
33 | ||
30f58b22 DW |
34 | if (st && st->ss->default_geometry) |
35 | st->ss->default_geometry(st, &level, &layout, NULL); | |
a18a888e DW |
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 | fprintf(stderr, | |
ccaeea03 | 46 | Name ": layout defaults to n2\n"); |
a18a888e DW |
47 | break; |
48 | case 5: | |
49 | case 6: | |
50 | layout = map_name(r5layout, "default"); | |
51 | if (verbose > 0) | |
52 | fprintf(stderr, | |
53 | Name ": layout defaults to %s\n", map_num(r5layout, layout)); | |
54 | break; | |
55 | case LEVEL_FAULTY: | |
56 | layout = map_name(faultylayout, "default"); | |
57 | ||
58 | if (verbose > 0) | |
59 | fprintf(stderr, | |
60 | Name ": layout defaults to %s\n", map_num(faultylayout, layout)); | |
61 | break; | |
62 | } | |
63 | ||
64 | return layout; | |
65 | } | |
66 | ||
67 | ||
7f91af49 | 68 | int Create(struct supertype *st, char *mddev, |
acab7bb1 N |
69 | int chunk, int level, int layout, unsigned long long size, |
70 | int raiddisks, int sparedisks, | |
3d3dd91e | 71 | char *name, char *homehost, int *uuid, |
a655e550 | 72 | int subdevs, struct mddev_dev *devlist, |
47d79ef8 | 73 | int runstop, int verbose, int force, int assume_clean, |
acab7bb1 N |
74 | char *bitmap_file, int bitmap_chunk, int write_behind, |
75 | int delay, int autof) | |
64c4757e | 76 | { |
682c7051 NB |
77 | /* |
78 | * Create a new raid array. | |
79 | * | |
80 | * First check that necessary details are available | |
81 | * (i.e. level, raid-disks) | |
82 | * | |
83 | * Then check each disk to see what might be on it | |
84 | * and report anything interesting. | |
85 | * | |
86 | * If anything looks odd, and runstop not set, | |
87 | * abort. | |
88 | * | |
89 | * SET_ARRAY_INFO and ADD_NEW_DISK, and | |
82d9eba6 | 90 | * if runstop==run, or raiddisks disks were used, |
682c7051 NB |
91 | * RUN_ARRAY |
92 | */ | |
7f91af49 | 93 | int mdfd; |
b5e64645 | 94 | unsigned long long minsize=0, maxsize=0; |
cd29a5c8 NB |
95 | char *mindisc = NULL; |
96 | char *maxdisc = NULL; | |
c913b90e | 97 | int dnum; |
a655e550 | 98 | struct mddev_dev *dv; |
682c7051 | 99 | int fail=0, warn=0; |
82b27616 | 100 | struct stat stb; |
82d9eba6 | 101 | int first_missing = subdevs * 2; |
6fb79233 | 102 | int second_missing = subdevs * 2; |
52826846 | 103 | int missing_disks = 0; |
82d9eba6 | 104 | int insert_point = subdevs * 2; /* where to insert a missing drive */ |
d2ca6449 | 105 | int total_slots; |
4b1ac34b | 106 | int pass; |
82d9eba6 NB |
107 | int vers; |
108 | int rv; | |
c82f047c | 109 | int bitmap_fd; |
5f8097be | 110 | int have_container = 0; |
0e600426 | 111 | int container_fd = -1; |
a931db9e | 112 | int need_mdmon = 0; |
f9c25f1d | 113 | unsigned long long bitmapsize; |
d2ca6449 | 114 | struct mdinfo info, *infos; |
b8ac1967 | 115 | int did_default = 0; |
a18a888e | 116 | int do_default_layout = 0; |
c21e737b | 117 | int do_default_chunk = 0; |
8ed3e5e1 | 118 | unsigned long safe_mode_delay = 0; |
a04d5763 | 119 | char chosen_name[1024]; |
ad5bc697 | 120 | struct map_ent *map = NULL; |
8592f29d | 121 | unsigned long long newsize; |
682c7051 | 122 | |
943eafef | 123 | int major_num = BITMAP_MAJOR_HI; |
dcec9ee5 | 124 | |
06c7f68e | 125 | memset(&info, 0, sizeof(info)); |
30f58b22 DW |
126 | if (level == UnSet && st && st->ss->default_geometry) |
127 | st->ss->default_geometry(st, &level, NULL, NULL); | |
98c6faba | 128 | if (level == UnSet) { |
682c7051 NB |
129 | fprintf(stderr, |
130 | Name ": a RAID level is needed to create an array.\n"); | |
131 | return 1; | |
132 | } | |
98c6faba NB |
133 | if (raiddisks < 4 && level == 6) { |
134 | fprintf(stderr, | |
135 | Name ": at least 4 raid-devices needed for level 6\n"); | |
136 | return 1; | |
137 | } | |
138 | if (raiddisks > 256 && level == 6) { | |
139 | fprintf(stderr, | |
140 | Name ": no more than 256 raid-devices supported for level 6\n"); | |
141 | return 1; | |
142 | } | |
52826846 NB |
143 | if (raiddisks < 2 && level >= 4) { |
144 | fprintf(stderr, | |
98c6faba | 145 | Name ": at least 2 raid-devices needed for level 4 or 5\n"); |
52826846 NB |
146 | return 1; |
147 | } | |
570510ba NB |
148 | if (level <= 0 && sparedisks) { |
149 | fprintf(stderr, | |
150 | Name ": This level does not support spare devices\n"); | |
151 | return 1; | |
152 | } | |
5f8097be NB |
153 | |
154 | if (subdevs == 1 && strcmp(devlist->devname, "missing") != 0) { | |
155 | /* If given a single device, it might be a container, and we can | |
156 | * extract a device list from there | |
157 | */ | |
158 | mdu_array_info_t inf; | |
159 | int fd; | |
160 | ||
161 | memset(&inf, 0, sizeof(inf)); | |
37ea3936 | 162 | fd = open(devlist->devname, O_RDONLY); |
5f8097be NB |
163 | if (fd >= 0 && |
164 | ioctl(fd, GET_ARRAY_INFO, &inf) == 0 && | |
165 | inf.raid_disks == 0) { | |
166 | /* yep, looks like a container */ | |
167 | if (st) { | |
0fb69d1d N |
168 | rv = st->ss->load_container(st, fd, |
169 | devlist->devname); | |
5f8097be NB |
170 | if (rv == 0) |
171 | have_container = 1; | |
172 | } else { | |
0fb69d1d | 173 | st = super_by_fd(fd, NULL); |
5f8097be | 174 | if (st && !(rv = st->ss-> |
0fb69d1d N |
175 | load_container(st, fd, |
176 | devlist->devname))) | |
5f8097be NB |
177 | have_container = 1; |
178 | else | |
179 | st = NULL; | |
180 | } | |
18fde300 | 181 | if (have_container) { |
8592f29d | 182 | subdevs = raiddisks; |
18fde300 DW |
183 | first_missing = subdevs * 2; |
184 | second_missing = subdevs * 2; | |
185 | insert_point = subdevs * 2; | |
186 | } | |
5f8097be NB |
187 | } |
188 | if (fd >= 0) | |
189 | close(fd); | |
5f8097be | 190 | } |
ffcfc735 N |
191 | if (st && st->ss->external && sparedisks) { |
192 | fprintf(stderr, | |
193 | Name ": This metadata type does not support " | |
b42f577a | 194 | "spare disks at create time\n"); |
ffcfc735 N |
195 | return 1; |
196 | } | |
682c7051 | 197 | if (subdevs > raiddisks+sparedisks) { |
b83d95f3 | 198 | fprintf(stderr, Name ": You have listed more devices (%d) than are in the array(%d)!\n", subdevs, raiddisks+sparedisks); |
52826846 | 199 | return 1; |
682c7051 | 200 | } |
5f8097be | 201 | if (!have_container && subdevs < raiddisks+sparedisks) { |
52826846 NB |
202 | fprintf(stderr, Name ": You haven't given enough devices (real or missing) to create this array\n"); |
203 | return 1; | |
204 | } | |
5b28bd56 NB |
205 | if (bitmap_file && level <= 0) { |
206 | fprintf(stderr, Name ": bitmaps not meaningful with level %s\n", | |
207 | map_num(pers, level)?:"given"); | |
208 | return 1; | |
209 | } | |
52826846 | 210 | |
682c7051 | 211 | /* now set some defaults */ |
b5e64645 | 212 | |
a18a888e DW |
213 | |
214 | if (layout == UnSet) { | |
215 | do_default_layout = 1; | |
216 | layout = default_layout(st, level, verbose); | |
217 | } | |
682c7051 | 218 | |
e5329c37 NB |
219 | if (level == 10) |
220 | /* check layout fits in array*/ | |
221 | if ((layout&255) * ((layout>>8)&255) > raiddisks) { | |
222 | fprintf(stderr, Name ": that layout requires at least %d devices\n", | |
223 | (layout&255) * ((layout>>8)&255)); | |
224 | return 1; | |
225 | } | |
226 | ||
aa88f531 NB |
227 | switch(level) { |
228 | case 4: | |
229 | case 5: | |
e5329c37 | 230 | case 10: |
98c6faba | 231 | case 6: |
aa88f531 | 232 | case 0: |
bb7295f1 N |
233 | if (chunk == 0 || chunk == UnSet) { |
234 | chunk = UnSet; | |
c21e737b CA |
235 | do_default_chunk = 1; |
236 | /* chunk will be set later */ | |
bb7295f1 | 237 | } |
5f175898 N |
238 | break; |
239 | case LEVEL_LINEAR: | |
240 | /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */ | |
241 | if (get_linux_version() < 2006016 && chunk == 0) { | |
aa88f531 | 242 | chunk = 64; |
dab6685f | 243 | if (verbose > 0) |
aa88f531 NB |
244 | fprintf(stderr, Name ": chunk size defaults to 64K\n"); |
245 | } | |
246 | break; | |
570510ba | 247 | case 1: |
08e43379 | 248 | case LEVEL_FAULTY: |
570510ba | 249 | case LEVEL_MULTIPATH: |
17f25ca6 | 250 | case LEVEL_CONTAINER: |
aa88f531 NB |
251 | if (chunk) { |
252 | chunk = 0; | |
dab6685f | 253 | if (verbose > 0) |
aa88f531 NB |
254 | fprintf(stderr, Name ": chunk size ignored for this level\n"); |
255 | } | |
256 | break; | |
570510ba NB |
257 | default: |
258 | fprintf(stderr, Name ": unknown level %d\n", level); | |
259 | return 1; | |
682c7051 | 260 | } |
8592f29d | 261 | |
bb7295f1 | 262 | if (size && chunk && chunk != UnSet) |
9f3bd60c | 263 | size &= ~(unsigned long long)(chunk - 1); |
8592f29d | 264 | newsize = size * 2; |
17f25ca6 | 265 | if (st && ! st->ss->validate_geometry(st, level, layout, raiddisks, |
c21e737b | 266 | &chunk, size*2, NULL, &newsize, verbose>=0)) |
17f25ca6 | 267 | return 1; |
bb7295f1 | 268 | |
db975ab5 | 269 | if (chunk && chunk != UnSet) { |
bb7295f1 | 270 | newsize &= ~(unsigned long long)(chunk*2 - 1); |
64385908 CA |
271 | if (do_default_chunk) { |
272 | /* default chunk was just set */ | |
273 | if (verbose > 0) | |
274 | fprintf(stderr, Name ": chunk size " | |
275 | "defaults to %dK\n", chunk); | |
276 | size &= ~(unsigned long long)(chunk - 1); | |
277 | do_default_chunk = 0; | |
278 | } | |
bb7295f1 | 279 | } |
64385908 | 280 | |
8592f29d N |
281 | if (size == 0) { |
282 | size = newsize / 2; | |
283 | if (size && verbose > 0) | |
284 | fprintf(stderr, Name ": setting size to %lluK\n", | |
285 | (unsigned long long)size); | |
286 | } | |
17f25ca6 | 287 | |
682c7051 | 288 | /* now look at the subdevs */ |
06c7f68e NB |
289 | info.array.active_disks = 0; |
290 | info.array.working_disks = 0; | |
c913b90e | 291 | dnum = 0; |
8592f29d | 292 | for (dv=devlist; dv && !have_container; dv=dv->next, dnum++) { |
cd29a5c8 | 293 | char *dname = dv->devname; |
17f25ca6 | 294 | unsigned long long freesize; |
e9b11fee N |
295 | int dfd; |
296 | ||
cd29a5c8 | 297 | if (strcasecmp(dname, "missing")==0) { |
c913b90e NB |
298 | if (first_missing > dnum) |
299 | first_missing = dnum; | |
6fb79233 NB |
300 | if (second_missing > dnum && dnum > first_missing) |
301 | second_missing = dnum; | |
52826846 NB |
302 | missing_disks ++; |
303 | continue; | |
304 | } | |
58b3c697 | 305 | dfd = open(dname, O_RDONLY); |
e9b11fee N |
306 | if (dfd < 0) { |
307 | fprintf(stderr, Name ": cannot open %s: %s\n", | |
308 | dname, strerror(errno)); | |
309 | exit(2); | |
310 | } | |
311 | if (fstat(dfd, &stb) != 0 || | |
312 | (stb.st_mode & S_IFMT) != S_IFBLK) { | |
313 | close(dfd); | |
314 | fprintf(stderr, Name ": %s is not a block device\n", | |
315 | dname); | |
316 | exit(2); | |
317 | } | |
318 | close(dfd); | |
06c7f68e | 319 | info.array.working_disks++; |
c913b90e | 320 | if (dnum < raiddisks) |
06c7f68e | 321 | info.array.active_disks++; |
058574b1 | 322 | if (st == NULL) { |
8aec876d | 323 | struct createinfo *ci = conf_get_create_info(); |
058574b1 NB |
324 | if (ci) |
325 | st = ci->supertype; | |
326 | } | |
576d6d83 NB |
327 | if (st == NULL) { |
328 | /* Need to choose a default metadata, which is different | |
17f25ca6 | 329 | * depending on geometry of array. |
576d6d83 NB |
330 | */ |
331 | int i; | |
332 | char *name = "default"; | |
17f25ca6 | 333 | for(i=0; !st && superlist[i]; i++) { |
576d6d83 | 334 | st = superlist[i]->match_metadata_desc(name); |
ecbd9e81 N |
335 | if (!st) |
336 | continue; | |
a18a888e DW |
337 | if (do_default_layout) |
338 | layout = default_layout(st, level, verbose); | |
ecbd9e81 N |
339 | switch (st->ss->validate_geometry( |
340 | st, level, layout, raiddisks, | |
341 | &chunk, size*2, dname, &freesize, | |
342 | verbose > 0)) { | |
343 | case -1: /* Not valid, message printed, and not | |
344 | * worth checking any further */ | |
345 | exit(2); | |
346 | break; | |
347 | case 0: /* Geometry not valid */ | |
55425f27 | 348 | free(st); |
17f25ca6 | 349 | st = NULL; |
64385908 | 350 | chunk = do_default_chunk ? UnSet : chunk; |
ecbd9e81 N |
351 | break; |
352 | case 1: /* All happy */ | |
353 | break; | |
55425f27 | 354 | } |
17f25ca6 | 355 | } |
576d6d83 NB |
356 | |
357 | if (!st) { | |
58b3c697 N |
358 | int dfd = open(dname, O_RDONLY|O_EXCL); |
359 | if (dfd < 0) { | |
360 | fprintf(stderr, Name ": cannot open %s: %s\n", | |
361 | dname, strerror(errno)); | |
362 | exit(2); | |
363 | } | |
17f25ca6 NB |
364 | fprintf(stderr, Name ": device %s not suitable " |
365 | "for any style of array\n", | |
366 | dname); | |
576d6d83 NB |
367 | exit(2); |
368 | } | |
b8ac1967 | 369 | if (st->ss != &super0 || |
576d6d83 | 370 | st->minor_version != 90) |
b8ac1967 | 371 | did_default = 1; |
17f25ca6 | 372 | } else { |
a18a888e DW |
373 | if (do_default_layout) |
374 | layout = default_layout(st, level, verbose); | |
17f25ca6 NB |
375 | if (!st->ss->validate_geometry(st, level, layout, |
376 | raiddisks, | |
c21e737b | 377 | &chunk, size*2, dname, |
2c514b71 | 378 | &freesize, |
b42f577a | 379 | verbose >= 0)) { |
17f25ca6 NB |
380 | |
381 | fprintf(stderr, | |
382 | Name ": %s is not suitable for " | |
383 | "this array.\n", | |
384 | dname); | |
385 | fail = 1; | |
386 | continue; | |
387 | } | |
682c7051 | 388 | } |
82d9eba6 NB |
389 | |
390 | freesize /= 2; /* convert to K */ | |
db975ab5 | 391 | if (chunk && chunk != UnSet) { |
d2cd3ffc NB |
392 | /* round to chunk size */ |
393 | freesize = freesize & ~(chunk-1); | |
64385908 CA |
394 | if (do_default_chunk) { |
395 | /* default chunk was just set */ | |
396 | if (verbose > 0) | |
397 | fprintf(stderr, Name ": chunk size " | |
398 | "defaults to %dK\n", chunk); | |
399 | size &= ~(unsigned long long)(chunk - 1); | |
400 | do_default_chunk = 0; | |
401 | } | |
d2cd3ffc | 402 | } |
682c7051 NB |
403 | |
404 | if (size && freesize < size) { | |
42dc2744 | 405 | fprintf(stderr, Name ": %s is smaller than given size." |
17f25ca6 NB |
406 | " %lluK < %lluK + metadata\n", |
407 | dname, freesize, size); | |
52826846 | 408 | fail = 1; |
52826846 | 409 | continue; |
682c7051 | 410 | } |
cd29a5c8 NB |
411 | if (maxdisc == NULL || (maxdisc && freesize > maxsize)) { |
412 | maxdisc = dname; | |
52826846 | 413 | maxsize = freesize; |
682c7051 | 414 | } |
cd29a5c8 NB |
415 | if (mindisc ==NULL || (mindisc && freesize < minsize)) { |
416 | mindisc = dname; | |
52826846 | 417 | minsize = freesize; |
682c7051 | 418 | } |
dab6685f | 419 | if (runstop != 1 || verbose >= 0) { |
37ea3936 | 420 | int fd = open(dname, O_RDONLY); |
b6e63da4 NB |
421 | if (fd <0 ) { |
422 | fprintf(stderr, Name ": Cannot open %s: %s\n", | |
423 | dname, strerror(errno)); | |
424 | fail=1; | |
425 | continue; | |
426 | } | |
dab6685f NB |
427 | warn |= check_ext2(fd, dname); |
428 | warn |= check_reiser(fd, dname); | |
429 | warn |= check_raid(fd, dname); | |
034b203a TM |
430 | if (strcmp(st->ss->name, "1.x") == 0 && |
431 | st->minor_version >= 1) | |
432 | /* metadata at front */ | |
53ed6ac3 | 433 | warn |= check_partitions(fd, dname, 0, 0); |
0ac3f649 KW |
434 | else if (level == 1 || level == LEVEL_CONTAINER |
435 | || (level == 0 && raiddisks == 1)) | |
034b203a | 436 | /* partitions could be meaningful */ |
53ed6ac3 | 437 | warn |= check_partitions(fd, dname, freesize*2, size*2); |
034b203a TM |
438 | else |
439 | /* partitions cannot be meaningful */ | |
53ed6ac3 | 440 | warn |= check_partitions(fd, dname, 0, 0); |
034b203a | 441 | if (strcmp(st->ss->name, "1.x") == 0 && |
a0962fe9 N |
442 | st->minor_version >= 1 && |
443 | did_default && | |
034b203a TM |
444 | level == 1 && |
445 | (warn & 1024) == 0) { | |
446 | warn |= 1024; | |
a0962fe9 N |
447 | fprintf(stderr, Name ": Note: this array has metadata at the start and\n" |
448 | " may not be suitable as a boot device. If you plan to\n" | |
cc86f89c | 449 | " store '/boot' on this device please ensure that\n" |
a0962fe9 | 450 | " your boot-loader understands md/v1.x metadata, or use\n" |
cc86f89c | 451 | " --metadata=0.90\n"); |
a0962fe9 | 452 | } |
b6e63da4 | 453 | close(fd); |
dab6685f | 454 | } |
682c7051 | 455 | } |
acab7bb1 N |
456 | if (raiddisks + sparedisks > st->max_devs) { |
457 | fprintf(stderr, Name ": Too many devices:" | |
458 | " %s metadata only supports %d\n", | |
459 | st->ss->name, st->max_devs); | |
460 | return 1; | |
461 | } | |
8592f29d N |
462 | if (have_container) |
463 | info.array.working_disks = raiddisks; | |
682c7051 | 464 | if (fail) { |
52826846 NB |
465 | fprintf(stderr, Name ": create aborted\n"); |
466 | return 1; | |
682c7051 NB |
467 | } |
468 | if (size == 0) { | |
5f8097be | 469 | if (mindisc == NULL && !have_container) { |
52826846 NB |
470 | fprintf(stderr, Name ": no size and no drives given - aborting create.\n"); |
471 | return 1; | |
472 | } | |
5f8097be NB |
473 | if (level > 0 || level == LEVEL_MULTIPATH |
474 | || level == LEVEL_FAULTY | |
b8ac1967 | 475 | || st->ss->external ) { |
b5e64645 | 476 | /* size is meaningful */ |
b8ac1967 NB |
477 | if (!st->ss->validate_geometry(st, level, layout, |
478 | raiddisks, | |
c21e737b | 479 | &chunk, minsize*2, |
2c514b71 | 480 | NULL, NULL, 0)) { |
aba69144 | 481 | fprintf(stderr, Name ": devices too large for RAID level %d\n", level); |
b5e64645 NB |
482 | return 1; |
483 | } | |
484 | size = minsize; | |
dab6685f | 485 | if (verbose > 0) |
5dd497ee | 486 | fprintf(stderr, Name ": size set to %lluK\n", size); |
b5e64645 | 487 | } |
682c7051 | 488 | } |
8592f29d | 489 | if (!have_container && level > 0 && ((maxsize-size)*100 > maxsize)) { |
dab6685f | 490 | if (runstop != 1 || verbose >= 0) |
8592f29d | 491 | fprintf(stderr, Name ": largest drive (%s) exceeds size (%lluK) by more than 1%%\n", |
dab6685f | 492 | maxdisc, size); |
52826846 | 493 | warn = 1; |
682c7051 NB |
494 | } |
495 | ||
5615172f DW |
496 | if (st->ss->detail_platform && st->ss->detail_platform(0, 1) != 0) { |
497 | if (runstop != 1 || verbose >= 0) | |
498 | fprintf(stderr, Name ": %s unable to enumerate platform support\n" | |
499 | " array may not be compatible with hardware/firmware\n", | |
500 | st->ss->name); | |
501 | warn = 1; | |
502 | } | |
503 | ||
682c7051 | 504 | if (warn) { |
52826846 NB |
505 | if (runstop!= 1) { |
506 | if (!ask("Continue creating array? ")) { | |
507 | fprintf(stderr, Name ": create aborted.\n"); | |
508 | return 1; | |
509 | } | |
510 | } else { | |
dab6685f | 511 | if (verbose > 0) |
52826846 | 512 | fprintf(stderr, Name ": creation continuing despite oddities due to --run\n"); |
682c7051 | 513 | } |
682c7051 NB |
514 | } |
515 | ||
66f8bbbe | 516 | /* If this is raid4/5, we want to configure the last active slot |
52826846 | 517 | * as missing, so that a reconstruct happens (faster than re-parity) |
98c6faba | 518 | * FIX: Can we do this for raid6 as well? |
52826846 | 519 | */ |
87b47257 N |
520 | if (st->ss->external == 0 && |
521 | assume_clean==0 && force == 0 && first_missing >= raiddisks) { | |
98c6faba | 522 | switch ( level ) { |
66f8bbbe | 523 | case 4: |
98c6faba NB |
524 | case 5: |
525 | insert_point = raiddisks-1; | |
526 | sparedisks++; | |
06c7f68e | 527 | info.array.active_disks--; |
98c6faba NB |
528 | missing_disks++; |
529 | break; | |
530 | default: | |
531 | break; | |
532 | } | |
52826846 | 533 | } |
6fb79233 NB |
534 | /* For raid6, if creating with 1 missing drive, make a good drive |
535 | * into a spare, else the create will fail | |
536 | */ | |
537 | if (assume_clean == 0 && force == 0 && first_missing < raiddisks && | |
ffcfc735 | 538 | st->ss->external == 0 && |
6fb79233 NB |
539 | second_missing >= raiddisks && level == 6) { |
540 | insert_point = raiddisks - 1; | |
541 | if (insert_point == first_missing) | |
542 | insert_point--; | |
543 | sparedisks ++; | |
544 | info.array.active_disks--; | |
545 | missing_disks++; | |
546 | } | |
570510ba | 547 | |
5f8097be | 548 | if (level <= 0 && first_missing < subdevs * 2) { |
570510ba NB |
549 | fprintf(stderr, |
550 | Name ": This level does not support missing devices\n"); | |
551 | return 1; | |
552 | } | |
aba69144 | 553 | |
7f91af49 | 554 | /* We need to create the device */ |
ad5bc697 | 555 | map_lock(&map); |
a04d5763 | 556 | mdfd = create_mddev(mddev, name, autof, LOCAL, chosen_name); |
7f91af49 N |
557 | if (mdfd < 0) |
558 | return 1; | |
f2be09f1 | 559 | mddev = chosen_name; |
7f91af49 N |
560 | |
561 | vers = md_get_version(mdfd); | |
562 | if (vers < 9000) { | |
563 | fprintf(stderr, Name ": Create requires md driver version 0.90.0 or later\n"); | |
564 | goto abort; | |
565 | } else { | |
566 | mdu_array_info_t inf; | |
567 | memset(&inf, 0, sizeof(inf)); | |
568 | ioctl(mdfd, GET_ARRAY_INFO, &inf); | |
569 | if (inf.working_disks != 0) { | |
570 | fprintf(stderr, Name ": another array by this name" | |
571 | " is already running.\n"); | |
572 | goto abort; | |
573 | } | |
574 | } | |
a04d5763 | 575 | |
682c7051 NB |
576 | /* Ok, lets try some ioctls */ |
577 | ||
06c7f68e NB |
578 | info.array.level = level; |
579 | info.array.size = size; | |
580 | info.array.raid_disks = raiddisks; | |
82b27616 NB |
581 | /* The kernel should *know* what md_minor we are dealing |
582 | * with, but it chooses to trust me instead. Sigh | |
583 | */ | |
06c7f68e | 584 | info.array.md_minor = 0; |
82b27616 | 585 | if (fstat(mdfd, &stb)==0) |
06c7f68e NB |
586 | info.array.md_minor = minor(stb.st_rdev); |
587 | info.array.not_persistent = 0; | |
6fb79233 | 588 | |
66f8bbbe | 589 | if ( ( (level == 4 || level == 5) && |
b5e64645 NB |
590 | (insert_point < raiddisks || first_missing < raiddisks) ) |
591 | || | |
6fb79233 NB |
592 | ( level == 6 && (insert_point < raiddisks |
593 | || second_missing < raiddisks)) | |
47d79ef8 | 594 | || |
d024b0a7 NB |
595 | ( level <= 0 ) |
596 | || | |
47d79ef8 | 597 | assume_clean |
103f2410 | 598 | ) { |
06c7f68e | 599 | info.array.state = 1; /* clean, but one+ drive will be missing*/ |
b7528a20 | 600 | info.resync_start = MaxSector; |
103f2410 | 601 | } else { |
06c7f68e | 602 | info.array.state = 0; /* not clean, but no errors */ |
103f2410 NB |
603 | info.resync_start = 0; |
604 | } | |
f9c25f1d NB |
605 | if (level == 10) { |
606 | /* for raid10, the bitmap size is the capacity of the array, | |
607 | * which is array.size * raid_disks / ncopies; | |
608 | * .. but convert to sectors. | |
609 | */ | |
702b557b | 610 | int ncopies = ((layout>>8) & 255) * (layout & 255); |
5dd497ee NB |
611 | bitmapsize = (unsigned long long)size * raiddisks / ncopies * 2; |
612 | /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, size, raiddisks, ncopies);*/ | |
f9c25f1d | 613 | } else |
5dd497ee | 614 | bitmapsize = (unsigned long long)size * 2; |
f9c25f1d | 615 | |
82b27616 NB |
616 | /* There is lots of redundancy in these disk counts, |
617 | * raid_disks is the most meaningful value | |
618 | * it describes the geometry of the array | |
619 | * it is constant | |
620 | * nr_disks is total number of used slots. | |
621 | * it should be raid_disks+spare_disks | |
622 | * spare_disks is the number of extra disks present | |
623 | * see above | |
624 | * active_disks is the number of working disks in | |
625 | * active slots. (With raid_disks) | |
626 | * working_disks is the total number of working disks, | |
627 | * including spares | |
628 | * failed_disks is the number of disks marked failed | |
629 | * | |
630 | * Ideally, the kernel would keep these (except raid_disks) | |
631 | * up-to-date as we ADD_NEW_DISK, but it doesn't (yet). | |
632 | * So for now, we assume that all raid and spare | |
633 | * devices will be given. | |
634 | */ | |
06c7f68e NB |
635 | info.array.spare_disks=sparedisks; |
636 | info.array.failed_disks=missing_disks; | |
637 | info.array.nr_disks = info.array.working_disks | |
638 | + info.array.failed_disks; | |
639 | info.array.layout = layout; | |
640 | info.array.chunk_size = chunk*1024; | |
82d9eba6 | 641 | |
b3b33eb5 NB |
642 | if (name == NULL || *name == 0) { |
643 | /* base name on mddev */ | |
d1e80164 NB |
644 | /* /dev/md0 -> 0 |
645 | * /dev/md_d0 -> d0 | |
646 | * /dev/md/1 -> 1 | |
647 | * /dev/md/d1 -> d1 | |
648 | * /dev/md/home -> home | |
649 | * /dev/mdhome -> home | |
650 | */ | |
69207ff6 | 651 | /* FIXME compare this with rules in create_mddev */ |
b3b33eb5 NB |
652 | name = strrchr(mddev, '/'); |
653 | if (name) { | |
654 | name++; | |
60248f74 NB |
655 | if (strncmp(name, "md_d", 4)==0 && |
656 | strlen(name) > 4 && | |
657 | isdigit(name[4]) && | |
b3b33eb5 | 658 | (name-mddev) == 5 /* /dev/ */) |
d1e80164 | 659 | name += 3; |
60248f74 NB |
660 | else if (strncmp(name, "md", 2)==0 && |
661 | strlen(name) > 2 && | |
662 | isdigit(name[2]) && | |
663 | (name-mddev) == 5 /* /dev/ */) | |
b3b33eb5 NB |
664 | name += 2; |
665 | } | |
666 | } | |
06c7f68e | 667 | if (!st->ss->init_super(st, &info.array, size, name, homehost, uuid)) |
7f91af49 | 668 | goto abort; |
682c7051 | 669 | |
d2ca6449 | 670 | total_slots = info.array.nr_disks; |
a5d85af7 | 671 | st->ss->getinfo_super(st, &info, NULL); |
95eeceeb | 672 | sysfs_init(&info, mdfd, 0); |
159c3a1a | 673 | |
f7f1b6a1 | 674 | if (did_default && verbose >= 0) { |
3c558363 | 675 | if (is_subarray(info.text_version)) { |
f7f1b6a1 NB |
676 | int dnum = devname2devnum(info.text_version+1); |
677 | char *path; | |
678 | int mdp = get_mdp_major(); | |
679 | struct mdinfo *mdi; | |
680 | if (dnum > 0) | |
681 | path = map_dev(MD_MAJOR, dnum, 1); | |
682 | else | |
683 | path = map_dev(mdp, (-1-dnum)<< 6, 1); | |
684 | ||
685 | mdi = sysfs_read(-1, dnum, GET_VERSION); | |
686 | ||
687 | fprintf(stderr, Name ": Creating array inside " | |
688 | "%s container %s\n", | |
689 | mdi?mdi->text_version:"managed", path); | |
690 | sysfs_free(mdi); | |
691 | } else | |
692 | fprintf(stderr, Name ": Defaulting to version" | |
693 | " %s metadata\n", info.text_version); | |
694 | } | |
b8ac1967 | 695 | |
ad5bc697 | 696 | map_update(&map, fd2devnum(mdfd), info.text_version, |
a04d5763 | 697 | info.uuid, chosen_name); |
ad5bc697 | 698 | map_unlock(&map); |
a04d5763 | 699 | |
dcec9ee5 | 700 | if (bitmap_file && vers < 9003) { |
943eafef | 701 | major_num = BITMAP_MAJOR_HOSTENDIAN; |
dcec9ee5 NB |
702 | #ifdef __BIG_ENDIAN |
703 | fprintf(stderr, Name ": Warning - bitmaps created on this kernel are not portable\n" | |
704 | " between different architectured. Consider upgrading the Linux kernel.\n"); | |
705 | #endif | |
706 | } | |
707 | ||
55935d51 NB |
708 | if (bitmap_file && strcmp(bitmap_file, "internal")==0) { |
709 | if ((vers%100) < 2) { | |
710 | fprintf(stderr, Name ": internal bitmaps not supported by this kernel.\n"); | |
7f91af49 | 711 | goto abort; |
55935d51 | 712 | } |
ebeb3663 N |
713 | if (!st->ss->add_internal_bitmap) { |
714 | fprintf(stderr, Name ": internal bitmaps not supported with %s metadata\n", | |
715 | st->ss->name); | |
716 | goto abort; | |
717 | } | |
3da92f27 | 718 | if (!st->ss->add_internal_bitmap(st, &bitmap_chunk, |
199171a2 | 719 | delay, write_behind, |
943eafef | 720 | bitmapsize, 1, major_num)) { |
55935d51 | 721 | fprintf(stderr, Name ": Given bitmap chunk size not supported.\n"); |
7f91af49 | 722 | goto abort; |
55935d51 NB |
723 | } |
724 | bitmap_file = NULL; | |
725 | } | |
726 | ||
727 | ||
f35f2525 | 728 | sysfs_init(&info, mdfd, 0); |
55935d51 | 729 | |
d1d599ea | 730 | if (st->ss->external && st->container_dev != NoMdDev) { |
f35f2525 N |
731 | /* member */ |
732 | ||
733 | /* When creating a member, we need to be careful | |
734 | * to negotiate with mdmon properly. | |
735 | * If it is already running, we cannot write to | |
736 | * the devices and must ask it to do that part. | |
737 | * If it isn't running, we write to the devices, | |
738 | * and then start it. | |
739 | * We hold an exclusive open on the container | |
740 | * device to make sure mdmon doesn't exit after | |
741 | * we checked that it is running. | |
742 | * | |
743 | * For now, fail if it is already running. | |
744 | */ | |
745 | container_fd = open_dev_excl(st->container_dev); | |
746 | if (container_fd < 0) { | |
747 | fprintf(stderr, Name ": Cannot get exclusive " | |
748 | "open on container - weird.\n"); | |
7f91af49 | 749 | goto abort; |
d03373f1 | 750 | } |
f35f2525 N |
751 | if (mdmon_running(st->container_dev)) { |
752 | if (verbose) | |
753 | fprintf(stderr, Name ": reusing mdmon " | |
754 | "for %s.\n", | |
755 | devnum2devname(st->container_dev)); | |
756 | st->update_tail = &st->updates; | |
757 | } else | |
758 | need_mdmon = 1; | |
759 | } | |
760 | rv = set_array_info(mdfd, st, &info); | |
82d9eba6 | 761 | if (rv) { |
f35f2525 | 762 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", |
52826846 | 763 | mddev, strerror(errno)); |
7f91af49 | 764 | goto abort; |
682c7051 | 765 | } |
52826846 | 766 | |
c82f047c NB |
767 | if (bitmap_file) { |
768 | int uuid[4]; | |
55935d51 | 769 | |
3da92f27 | 770 | st->ss->uuid_from_super(st, uuid); |
dfd4d8ee | 771 | if (CreateBitmap(bitmap_file, force, (char*)uuid, bitmap_chunk, |
dcec9ee5 | 772 | delay, write_behind, |
f9c25f1d | 773 | bitmapsize, |
943eafef | 774 | major_num)) { |
7f91af49 | 775 | goto abort; |
c82f047c NB |
776 | } |
777 | bitmap_fd = open(bitmap_file, O_RDWR); | |
778 | if (bitmap_fd < 0) { | |
779 | fprintf(stderr, Name ": weird: %s cannot be openned\n", | |
dcec9ee5 | 780 | bitmap_file); |
7f91af49 | 781 | goto abort; |
c82f047c NB |
782 | } |
783 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
784 | fprintf(stderr, Name ": Cannot set bitmap file for %s: %s\n", | |
785 | mddev, strerror(errno)); | |
7f91af49 | 786 | goto abort; |
c82f047c NB |
787 | } |
788 | } | |
789 | ||
d2ca6449 | 790 | infos = malloc(sizeof(*infos) * total_slots); |
4b1ac34b | 791 | |
4b1ac34b | 792 | for (pass=1; pass <=2 ; pass++) { |
a655e550 | 793 | struct mddev_dev *moved_disk = NULL; /* the disk that was moved out of the insert point */ |
4b1ac34b NB |
794 | |
795 | for (dnum=0, dv = devlist ; dv ; | |
796 | dv=(dv->next)?(dv->next):moved_disk, dnum++) { | |
797 | int fd; | |
798 | struct stat stb; | |
d2ca6449 | 799 | struct mdinfo *inf = &infos[dnum]; |
4b1ac34b | 800 | |
d2ca6449 NB |
801 | if (dnum >= total_slots) |
802 | abort(); | |
4b1ac34b NB |
803 | if (dnum == insert_point) { |
804 | moved_disk = dv; | |
8592f29d | 805 | continue; |
52826846 | 806 | } |
8592f29d | 807 | if (strcasecmp(dv->devname, "missing")==0) |
111d01fc | 808 | continue; |
8592f29d N |
809 | if (have_container) |
810 | moved_disk = NULL; | |
811 | if (have_container && dnum < info.array.raid_disks - 1) | |
812 | /* repeatedly use the container */ | |
813 | moved_disk = dv; | |
111d01fc | 814 | |
d2ca6449 NB |
815 | switch(pass) { |
816 | case 1: | |
817 | *inf = info; | |
5f8097be | 818 | |
d2ca6449 NB |
819 | inf->disk.number = dnum; |
820 | inf->disk.raid_disk = dnum; | |
821 | if (inf->disk.raid_disk < raiddisks) | |
822 | inf->disk.state = (1<<MD_DISK_ACTIVE) | | |
823 | (1<<MD_DISK_SYNC); | |
824 | else | |
825 | inf->disk.state = 0; | |
826 | ||
b01b06bd | 827 | if (dv->writemostly == 1) |
d2ca6449 NB |
828 | inf->disk.state |= (1<<MD_DISK_WRITEMOSTLY); |
829 | ||
8592f29d N |
830 | if (have_container) |
831 | fd = -1; | |
832 | else { | |
d1d599ea N |
833 | if (st->ss->external && |
834 | st->container_dev != NoMdDev) | |
8592f29d N |
835 | fd = open(dv->devname, O_RDWR); |
836 | else | |
837 | fd = open(dv->devname, O_RDWR|O_EXCL); | |
838 | ||
839 | if (fd < 0) { | |
840 | fprintf(stderr, Name ": failed to open %s " | |
841 | "after earlier success - aborting\n", | |
842 | dv->devname); | |
843 | goto abort; | |
844 | } | |
845 | fstat(fd, &stb); | |
846 | inf->disk.major = major(stb.st_rdev); | |
847 | inf->disk.minor = minor(stb.st_rdev); | |
d2ca6449 | 848 | } |
8592f29d N |
849 | if (fd >= 0) |
850 | remove_partitions(fd); | |
f20c3968 | 851 | if (st->ss->add_to_super(st, &inf->disk, |
4eb26970 DW |
852 | fd, dv->devname)) { |
853 | ioctl(mdfd, STOP_ARRAY, NULL); | |
f20c3968 | 854 | goto abort; |
4eb26970 | 855 | } |
a5d85af7 | 856 | st->ss->getinfo_super(st, inf, NULL); |
8ed3e5e1 | 857 | safe_mode_delay = inf->safe_mode_delay; |
d2ca6449 | 858 | |
8592f29d N |
859 | if (have_container && verbose > 0) |
860 | fprintf(stderr, Name ": Using %s for device %d\n", | |
861 | map_dev(inf->disk.major, | |
862 | inf->disk.minor, | |
863 | 0), dnum); | |
864 | ||
865 | if (!have_container) { | |
866 | /* getinfo_super might have lost these ... */ | |
867 | inf->disk.major = major(stb.st_rdev); | |
868 | inf->disk.minor = minor(stb.st_rdev); | |
869 | } | |
4b1ac34b NB |
870 | break; |
871 | case 2: | |
d2ca6449 | 872 | inf->errors = 0; |
4b1ac34b | 873 | |
f35f2525 | 874 | rv = add_disk(mdfd, st, &info, inf); |
d2ca6449 | 875 | |
2503d23b | 876 | if (rv) { |
d03373f1 NB |
877 | fprintf(stderr, |
878 | Name ": ADD_NEW_DISK for %s " | |
879 | "failed: %s\n", | |
4b1ac34b | 880 | dv->devname, strerror(errno)); |
7f91af49 | 881 | goto abort; |
4b1ac34b | 882 | } |
4b1ac34b NB |
883 | break; |
884 | } | |
8592f29d N |
885 | if (!have_container && |
886 | dv == moved_disk && dnum != insert_point) break; | |
52826846 | 887 | } |
edd8d13c | 888 | if (pass == 1) { |
9b1fb677 DW |
889 | struct mdinfo info_new; |
890 | struct map_ent *me = NULL; | |
891 | ||
892 | /* check to see if the uuid has changed due to these | |
893 | * metadata changes, and if so update the member array | |
894 | * and container uuid. Note ->write_init_super clears | |
895 | * the subarray cursor such that ->getinfo_super once | |
896 | * again returns container info. | |
897 | */ | |
898 | map_lock(&map); | |
a5d85af7 | 899 | st->ss->getinfo_super(st, &info_new, NULL); |
9b1fb677 DW |
900 | if (st->ss->external && level != LEVEL_CONTAINER && |
901 | !same_uuid(info_new.uuid, info.uuid, 0)) { | |
902 | map_update(&map, fd2devnum(mdfd), | |
903 | info_new.text_version, | |
904 | info_new.uuid, chosen_name); | |
905 | me = map_by_devnum(&map, st->container_dev); | |
906 | } | |
907 | ||
ab80e597 N |
908 | if (st->ss->write_init_super(st)) { |
909 | fprintf(stderr, | |
910 | Name ": Failed to write metadata to %s\n", | |
911 | dv->devname); | |
912 | st->ss->free_super(st); | |
913 | goto abort; | |
914 | } | |
9b1fb677 DW |
915 | |
916 | /* update parent container uuid */ | |
917 | if (me) { | |
918 | char *path = strdup(me->path); | |
919 | ||
a5d85af7 | 920 | st->ss->getinfo_super(st, &info_new, NULL); |
9b1fb677 DW |
921 | map_update(&map, st->container_dev, |
922 | info_new.text_version, | |
923 | info_new.uuid, path); | |
924 | free(path); | |
925 | } | |
926 | map_unlock(&map); | |
927 | ||
edd8d13c | 928 | flush_metadata_updates(st); |
6946681d | 929 | st->ss->free_super(st); |
edd8d13c | 930 | } |
5e52ae9e | 931 | } |
d2ca6449 | 932 | free(infos); |
5e52ae9e | 933 | |
97590376 N |
934 | if (level == LEVEL_CONTAINER) { |
935 | /* No need to start. But we should signal udev to | |
936 | * create links */ | |
937 | sysfs_uevent(&info, "change"); | |
ed034b11 N |
938 | if (verbose >= 0) |
939 | fprintf(stderr, Name ": container %s prepared.\n", mddev); | |
a7c6e3fb | 940 | wait_for(chosen_name, mdfd); |
97590376 | 941 | } else if (runstop == 1 || subdevs >= raiddisks) { |
598f0d58 | 942 | if (st->ss->external) { |
4c821454 | 943 | int err; |
598f0d58 NB |
944 | switch(level) { |
945 | case LEVEL_LINEAR: | |
946 | case LEVEL_MULTIPATH: | |
947 | case 0: | |
4c821454 N |
948 | err = sysfs_set_str(&info, NULL, "array_state", |
949 | "active"); | |
a931db9e | 950 | need_mdmon = 0; |
598f0d58 NB |
951 | break; |
952 | default: | |
4c821454 N |
953 | err = sysfs_set_str(&info, NULL, "array_state", |
954 | "readonly"); | |
598f0d58 NB |
955 | break; |
956 | } | |
f35f2525 | 957 | sysfs_set_safemode(&info, safe_mode_delay); |
4c821454 N |
958 | if (err) { |
959 | fprintf(stderr, Name ": failed to" | |
960 | " activate array.\n"); | |
961 | ioctl(mdfd, STOP_ARRAY, NULL); | |
962 | goto abort; | |
963 | } | |
598f0d58 | 964 | } else { |
97590376 | 965 | /* param is not actually used */ |
598f0d58 NB |
966 | mdu_param_t param; |
967 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { | |
968 | fprintf(stderr, Name ": RUN_ARRAY failed: %s\n", | |
969 | strerror(errno)); | |
a252c078 N |
970 | if (info.array.chunk_size & (info.array.chunk_size-1)) { |
971 | fprintf(stderr, " : Problem may be that " | |
972 | "chunk size is not a power of 2\n"); | |
973 | } | |
4eb26970 | 974 | ioctl(mdfd, STOP_ARRAY, NULL); |
7f91af49 | 975 | goto abort; |
598f0d58 | 976 | } |
682c7051 | 977 | } |
dab6685f NB |
978 | if (verbose >= 0) |
979 | fprintf(stderr, Name ": array %s started.\n", mddev); | |
d1d599ea | 980 | if (st->ss->external && st->container_dev != NoMdDev) { |
8850ee3e N |
981 | if (need_mdmon) |
982 | start_mdmon(st->container_dev); | |
983 | ||
983fff45 | 984 | ping_monitor_by_id(st->container_dev); |
a931db9e NB |
985 | close(container_fd); |
986 | } | |
a7c6e3fb | 987 | wait_for(chosen_name, mdfd); |
682c7051 | 988 | } else { |
b83d95f3 | 989 | fprintf(stderr, Name ": not starting array - not enough devices.\n"); |
682c7051 | 990 | } |
7f91af49 | 991 | close(mdfd); |
682c7051 | 992 | return 0; |
7f91af49 N |
993 | |
994 | abort: | |
4eb26970 DW |
995 | map_lock(&map); |
996 | map_remove(&map, fd2devnum(mdfd)); | |
997 | map_unlock(&map); | |
998 | ||
7f91af49 N |
999 | if (mdfd >= 0) |
1000 | close(mdfd); | |
1001 | return 1; | |
64c4757e | 1002 | } |