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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; |
8ed3e5e1 | 117 | unsigned long safe_mode_delay = 0; |
a04d5763 | 118 | char chosen_name[1024]; |
ad5bc697 | 119 | struct map_ent *map = NULL; |
8592f29d | 120 | unsigned long long newsize; |
682c7051 | 121 | |
943eafef | 122 | int major_num = BITMAP_MAJOR_HI; |
dcec9ee5 | 123 | |
06c7f68e | 124 | memset(&info, 0, sizeof(info)); |
30f58b22 DW |
125 | if (level == UnSet && st && st->ss->default_geometry) |
126 | st->ss->default_geometry(st, &level, NULL, NULL); | |
98c6faba | 127 | if (level == UnSet) { |
682c7051 NB |
128 | fprintf(stderr, |
129 | Name ": a RAID level is needed to create an array.\n"); | |
130 | return 1; | |
131 | } | |
98c6faba NB |
132 | if (raiddisks < 4 && level == 6) { |
133 | fprintf(stderr, | |
134 | Name ": at least 4 raid-devices needed for level 6\n"); | |
135 | return 1; | |
136 | } | |
137 | if (raiddisks > 256 && level == 6) { | |
138 | fprintf(stderr, | |
139 | Name ": no more than 256 raid-devices supported for level 6\n"); | |
140 | return 1; | |
141 | } | |
52826846 NB |
142 | if (raiddisks < 2 && level >= 4) { |
143 | fprintf(stderr, | |
98c6faba | 144 | Name ": at least 2 raid-devices needed for level 4 or 5\n"); |
52826846 NB |
145 | return 1; |
146 | } | |
570510ba NB |
147 | if (level <= 0 && sparedisks) { |
148 | fprintf(stderr, | |
149 | Name ": This level does not support spare devices\n"); | |
150 | return 1; | |
151 | } | |
5f8097be NB |
152 | |
153 | if (subdevs == 1 && strcmp(devlist->devname, "missing") != 0) { | |
154 | /* If given a single device, it might be a container, and we can | |
155 | * extract a device list from there | |
156 | */ | |
157 | mdu_array_info_t inf; | |
158 | int fd; | |
159 | ||
160 | memset(&inf, 0, sizeof(inf)); | |
37ea3936 | 161 | fd = open(devlist->devname, O_RDONLY); |
5f8097be NB |
162 | if (fd >= 0 && |
163 | ioctl(fd, GET_ARRAY_INFO, &inf) == 0 && | |
164 | inf.raid_disks == 0) { | |
165 | /* yep, looks like a container */ | |
166 | if (st) { | |
0fb69d1d N |
167 | rv = st->ss->load_container(st, fd, |
168 | devlist->devname); | |
5f8097be NB |
169 | if (rv == 0) |
170 | have_container = 1; | |
171 | } else { | |
0fb69d1d | 172 | st = super_by_fd(fd, NULL); |
5f8097be | 173 | if (st && !(rv = st->ss-> |
0fb69d1d N |
174 | load_container(st, fd, |
175 | devlist->devname))) | |
5f8097be NB |
176 | have_container = 1; |
177 | else | |
178 | st = NULL; | |
179 | } | |
18fde300 | 180 | if (have_container) { |
8592f29d | 181 | subdevs = raiddisks; |
18fde300 DW |
182 | first_missing = subdevs * 2; |
183 | second_missing = subdevs * 2; | |
184 | insert_point = subdevs * 2; | |
185 | } | |
5f8097be NB |
186 | } |
187 | if (fd >= 0) | |
188 | close(fd); | |
5f8097be | 189 | } |
ffcfc735 N |
190 | if (st && st->ss->external && sparedisks) { |
191 | fprintf(stderr, | |
192 | Name ": This metadata type does not support " | |
b42f577a | 193 | "spare disks at create time\n"); |
ffcfc735 N |
194 | return 1; |
195 | } | |
682c7051 | 196 | if (subdevs > raiddisks+sparedisks) { |
b83d95f3 | 197 | fprintf(stderr, Name ": You have listed more devices (%d) than are in the array(%d)!\n", subdevs, raiddisks+sparedisks); |
52826846 | 198 | return 1; |
682c7051 | 199 | } |
5f8097be | 200 | if (!have_container && subdevs < raiddisks+sparedisks) { |
52826846 NB |
201 | fprintf(stderr, Name ": You haven't given enough devices (real or missing) to create this array\n"); |
202 | return 1; | |
203 | } | |
5b28bd56 NB |
204 | if (bitmap_file && level <= 0) { |
205 | fprintf(stderr, Name ": bitmaps not meaningful with level %s\n", | |
206 | map_num(pers, level)?:"given"); | |
207 | return 1; | |
208 | } | |
52826846 | 209 | |
682c7051 | 210 | /* now set some defaults */ |
b5e64645 | 211 | |
a18a888e DW |
212 | |
213 | if (layout == UnSet) { | |
214 | do_default_layout = 1; | |
215 | layout = default_layout(st, level, verbose); | |
216 | } | |
682c7051 | 217 | |
e5329c37 NB |
218 | if (level == 10) |
219 | /* check layout fits in array*/ | |
220 | if ((layout&255) * ((layout>>8)&255) > raiddisks) { | |
221 | fprintf(stderr, Name ": that layout requires at least %d devices\n", | |
222 | (layout&255) * ((layout>>8)&255)); | |
223 | return 1; | |
224 | } | |
225 | ||
aa88f531 NB |
226 | switch(level) { |
227 | case 4: | |
228 | case 5: | |
e5329c37 | 229 | case 10: |
98c6faba | 230 | case 6: |
aa88f531 | 231 | case 0: |
aa88f531 | 232 | if (chunk == 0) { |
30f58b22 DW |
233 | if (st && st->ss->default_geometry) |
234 | st->ss->default_geometry(st, NULL, NULL, &chunk); | |
0bd16cf2 | 235 | chunk = chunk ? : 512; |
5f175898 | 236 | if (verbose > 0) |
0bd16cf2 | 237 | fprintf(stderr, Name ": chunk size defaults to %dK\n", chunk); |
5f175898 N |
238 | } |
239 | break; | |
240 | case LEVEL_LINEAR: | |
241 | /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */ | |
242 | if (get_linux_version() < 2006016 && chunk == 0) { | |
aa88f531 | 243 | chunk = 64; |
dab6685f | 244 | if (verbose > 0) |
aa88f531 NB |
245 | fprintf(stderr, Name ": chunk size defaults to 64K\n"); |
246 | } | |
247 | break; | |
570510ba | 248 | case 1: |
08e43379 | 249 | case LEVEL_FAULTY: |
570510ba | 250 | case LEVEL_MULTIPATH: |
17f25ca6 | 251 | case LEVEL_CONTAINER: |
aa88f531 NB |
252 | if (chunk) { |
253 | chunk = 0; | |
dab6685f | 254 | if (verbose > 0) |
aa88f531 NB |
255 | fprintf(stderr, Name ": chunk size ignored for this level\n"); |
256 | } | |
257 | break; | |
570510ba NB |
258 | default: |
259 | fprintf(stderr, Name ": unknown level %d\n", level); | |
260 | return 1; | |
682c7051 | 261 | } |
8592f29d | 262 | |
9f3bd60c N |
263 | if (size && chunk) |
264 | size &= ~(unsigned long long)(chunk - 1); | |
8592f29d | 265 | newsize = size * 2; |
17f25ca6 | 266 | if (st && ! st->ss->validate_geometry(st, level, layout, raiddisks, |
8592f29d | 267 | chunk, size*2, NULL, &newsize, verbose>=0)) |
17f25ca6 | 268 | return 1; |
8592f29d N |
269 | if (size == 0) { |
270 | size = newsize / 2; | |
271 | if (size && verbose > 0) | |
272 | fprintf(stderr, Name ": setting size to %lluK\n", | |
273 | (unsigned long long)size); | |
274 | } | |
17f25ca6 | 275 | |
682c7051 | 276 | /* now look at the subdevs */ |
06c7f68e NB |
277 | info.array.active_disks = 0; |
278 | info.array.working_disks = 0; | |
c913b90e | 279 | dnum = 0; |
8592f29d | 280 | for (dv=devlist; dv && !have_container; dv=dv->next, dnum++) { |
cd29a5c8 | 281 | char *dname = dv->devname; |
17f25ca6 | 282 | unsigned long long freesize; |
cd29a5c8 | 283 | if (strcasecmp(dname, "missing")==0) { |
c913b90e NB |
284 | if (first_missing > dnum) |
285 | first_missing = dnum; | |
6fb79233 NB |
286 | if (second_missing > dnum && dnum > first_missing) |
287 | second_missing = dnum; | |
52826846 NB |
288 | missing_disks ++; |
289 | continue; | |
290 | } | |
06c7f68e | 291 | info.array.working_disks++; |
c913b90e | 292 | if (dnum < raiddisks) |
06c7f68e | 293 | info.array.active_disks++; |
058574b1 | 294 | if (st == NULL) { |
8aec876d | 295 | struct createinfo *ci = conf_get_create_info(); |
058574b1 NB |
296 | if (ci) |
297 | st = ci->supertype; | |
298 | } | |
576d6d83 NB |
299 | if (st == NULL) { |
300 | /* Need to choose a default metadata, which is different | |
17f25ca6 | 301 | * depending on geometry of array. |
576d6d83 NB |
302 | */ |
303 | int i; | |
304 | char *name = "default"; | |
17f25ca6 | 305 | for(i=0; !st && superlist[i]; i++) { |
576d6d83 | 306 | st = superlist[i]->match_metadata_desc(name); |
a18a888e DW |
307 | if (do_default_layout) |
308 | layout = default_layout(st, level, verbose); | |
17f25ca6 NB |
309 | if (st && !st->ss->validate_geometry |
310 | (st, level, layout, raiddisks, | |
e46273eb | 311 | chunk, size*2, dname, &freesize, |
55425f27 CA |
312 | verbose > 0)) { |
313 | free(st); | |
17f25ca6 | 314 | st = NULL; |
55425f27 | 315 | } |
17f25ca6 | 316 | } |
576d6d83 NB |
317 | |
318 | if (!st) { | |
17f25ca6 NB |
319 | fprintf(stderr, Name ": device %s not suitable " |
320 | "for any style of array\n", | |
321 | dname); | |
576d6d83 NB |
322 | exit(2); |
323 | } | |
b8ac1967 | 324 | if (st->ss != &super0 || |
576d6d83 | 325 | st->minor_version != 90) |
b8ac1967 | 326 | did_default = 1; |
17f25ca6 | 327 | } else { |
a18a888e DW |
328 | if (do_default_layout) |
329 | layout = default_layout(st, level, verbose); | |
17f25ca6 NB |
330 | if (!st->ss->validate_geometry(st, level, layout, |
331 | raiddisks, | |
e46273eb | 332 | chunk, size*2, dname, |
2c514b71 | 333 | &freesize, |
b42f577a | 334 | verbose >= 0)) { |
17f25ca6 NB |
335 | |
336 | fprintf(stderr, | |
337 | Name ": %s is not suitable for " | |
338 | "this array.\n", | |
339 | dname); | |
340 | fail = 1; | |
341 | continue; | |
342 | } | |
682c7051 | 343 | } |
82d9eba6 NB |
344 | |
345 | freesize /= 2; /* convert to K */ | |
d2cd3ffc NB |
346 | if (chunk) { |
347 | /* round to chunk size */ | |
348 | freesize = freesize & ~(chunk-1); | |
349 | } | |
682c7051 NB |
350 | |
351 | if (size && freesize < size) { | |
42dc2744 | 352 | fprintf(stderr, Name ": %s is smaller than given size." |
17f25ca6 NB |
353 | " %lluK < %lluK + metadata\n", |
354 | dname, freesize, size); | |
52826846 | 355 | fail = 1; |
52826846 | 356 | continue; |
682c7051 | 357 | } |
cd29a5c8 NB |
358 | if (maxdisc == NULL || (maxdisc && freesize > maxsize)) { |
359 | maxdisc = dname; | |
52826846 | 360 | maxsize = freesize; |
682c7051 | 361 | } |
cd29a5c8 NB |
362 | if (mindisc ==NULL || (mindisc && freesize < minsize)) { |
363 | mindisc = dname; | |
52826846 | 364 | minsize = freesize; |
682c7051 | 365 | } |
dab6685f | 366 | if (runstop != 1 || verbose >= 0) { |
37ea3936 | 367 | int fd = open(dname, O_RDONLY); |
b6e63da4 NB |
368 | if (fd <0 ) { |
369 | fprintf(stderr, Name ": Cannot open %s: %s\n", | |
370 | dname, strerror(errno)); | |
371 | fail=1; | |
372 | continue; | |
373 | } | |
dab6685f NB |
374 | warn |= check_ext2(fd, dname); |
375 | warn |= check_reiser(fd, dname); | |
376 | warn |= check_raid(fd, dname); | |
034b203a TM |
377 | if (strcmp(st->ss->name, "1.x") == 0 && |
378 | st->minor_version >= 1) | |
379 | /* metadata at front */ | |
380 | warn |= check_partitions(fd, dname, 0); | |
381 | else if (level == 1 || level == LEVEL_CONTAINER) | |
382 | /* partitions could be meaningful */ | |
383 | warn |= check_partitions(fd, dname, freesize*2); | |
384 | else | |
385 | /* partitions cannot be meaningful */ | |
386 | warn |= check_partitions(fd, dname, 0); | |
387 | if (strcmp(st->ss->name, "1.x") == 0 && | |
a0962fe9 N |
388 | st->minor_version >= 1 && |
389 | did_default && | |
034b203a TM |
390 | level == 1 && |
391 | (warn & 1024) == 0) { | |
392 | warn |= 1024; | |
a0962fe9 N |
393 | fprintf(stderr, Name ": Note: this array has metadata at the start and\n" |
394 | " may not be suitable as a boot device. If you plan to\n" | |
cc86f89c | 395 | " store '/boot' on this device please ensure that\n" |
a0962fe9 | 396 | " your boot-loader understands md/v1.x metadata, or use\n" |
cc86f89c | 397 | " --metadata=0.90\n"); |
a0962fe9 | 398 | } |
b6e63da4 | 399 | close(fd); |
dab6685f | 400 | } |
682c7051 | 401 | } |
acab7bb1 N |
402 | if (raiddisks + sparedisks > st->max_devs) { |
403 | fprintf(stderr, Name ": Too many devices:" | |
404 | " %s metadata only supports %d\n", | |
405 | st->ss->name, st->max_devs); | |
406 | return 1; | |
407 | } | |
8592f29d N |
408 | if (have_container) |
409 | info.array.working_disks = raiddisks; | |
682c7051 | 410 | if (fail) { |
52826846 NB |
411 | fprintf(stderr, Name ": create aborted\n"); |
412 | return 1; | |
682c7051 NB |
413 | } |
414 | if (size == 0) { | |
5f8097be | 415 | if (mindisc == NULL && !have_container) { |
52826846 NB |
416 | fprintf(stderr, Name ": no size and no drives given - aborting create.\n"); |
417 | return 1; | |
418 | } | |
5f8097be NB |
419 | if (level > 0 || level == LEVEL_MULTIPATH |
420 | || level == LEVEL_FAULTY | |
b8ac1967 | 421 | || st->ss->external ) { |
b5e64645 | 422 | /* size is meaningful */ |
b8ac1967 NB |
423 | if (!st->ss->validate_geometry(st, level, layout, |
424 | raiddisks, | |
e46273eb | 425 | chunk, minsize*2, |
2c514b71 | 426 | NULL, NULL, 0)) { |
aba69144 | 427 | fprintf(stderr, Name ": devices too large for RAID level %d\n", level); |
b5e64645 NB |
428 | return 1; |
429 | } | |
430 | size = minsize; | |
dab6685f | 431 | if (verbose > 0) |
5dd497ee | 432 | fprintf(stderr, Name ": size set to %lluK\n", size); |
b5e64645 | 433 | } |
682c7051 | 434 | } |
8592f29d | 435 | if (!have_container && level > 0 && ((maxsize-size)*100 > maxsize)) { |
dab6685f | 436 | if (runstop != 1 || verbose >= 0) |
8592f29d | 437 | fprintf(stderr, Name ": largest drive (%s) exceeds size (%lluK) by more than 1%%\n", |
dab6685f | 438 | maxdisc, size); |
52826846 | 439 | warn = 1; |
682c7051 NB |
440 | } |
441 | ||
5615172f DW |
442 | if (st->ss->detail_platform && st->ss->detail_platform(0, 1) != 0) { |
443 | if (runstop != 1 || verbose >= 0) | |
444 | fprintf(stderr, Name ": %s unable to enumerate platform support\n" | |
445 | " array may not be compatible with hardware/firmware\n", | |
446 | st->ss->name); | |
447 | warn = 1; | |
448 | } | |
449 | ||
682c7051 | 450 | if (warn) { |
52826846 NB |
451 | if (runstop!= 1) { |
452 | if (!ask("Continue creating array? ")) { | |
453 | fprintf(stderr, Name ": create aborted.\n"); | |
454 | return 1; | |
455 | } | |
456 | } else { | |
dab6685f | 457 | if (verbose > 0) |
52826846 | 458 | fprintf(stderr, Name ": creation continuing despite oddities due to --run\n"); |
682c7051 | 459 | } |
682c7051 NB |
460 | } |
461 | ||
66f8bbbe | 462 | /* If this is raid4/5, we want to configure the last active slot |
52826846 | 463 | * as missing, so that a reconstruct happens (faster than re-parity) |
98c6faba | 464 | * FIX: Can we do this for raid6 as well? |
52826846 | 465 | */ |
87b47257 N |
466 | if (st->ss->external == 0 && |
467 | assume_clean==0 && force == 0 && first_missing >= raiddisks) { | |
98c6faba | 468 | switch ( level ) { |
66f8bbbe | 469 | case 4: |
98c6faba NB |
470 | case 5: |
471 | insert_point = raiddisks-1; | |
472 | sparedisks++; | |
06c7f68e | 473 | info.array.active_disks--; |
98c6faba NB |
474 | missing_disks++; |
475 | break; | |
476 | default: | |
477 | break; | |
478 | } | |
52826846 | 479 | } |
6fb79233 NB |
480 | /* For raid6, if creating with 1 missing drive, make a good drive |
481 | * into a spare, else the create will fail | |
482 | */ | |
483 | if (assume_clean == 0 && force == 0 && first_missing < raiddisks && | |
ffcfc735 | 484 | st->ss->external == 0 && |
6fb79233 NB |
485 | second_missing >= raiddisks && level == 6) { |
486 | insert_point = raiddisks - 1; | |
487 | if (insert_point == first_missing) | |
488 | insert_point--; | |
489 | sparedisks ++; | |
490 | info.array.active_disks--; | |
491 | missing_disks++; | |
492 | } | |
570510ba | 493 | |
5f8097be | 494 | if (level <= 0 && first_missing < subdevs * 2) { |
570510ba NB |
495 | fprintf(stderr, |
496 | Name ": This level does not support missing devices\n"); | |
497 | return 1; | |
498 | } | |
aba69144 | 499 | |
7f91af49 | 500 | /* We need to create the device */ |
ad5bc697 | 501 | map_lock(&map); |
a04d5763 | 502 | mdfd = create_mddev(mddev, name, autof, LOCAL, chosen_name); |
7f91af49 N |
503 | if (mdfd < 0) |
504 | return 1; | |
f2be09f1 | 505 | mddev = chosen_name; |
7f91af49 N |
506 | |
507 | vers = md_get_version(mdfd); | |
508 | if (vers < 9000) { | |
509 | fprintf(stderr, Name ": Create requires md driver version 0.90.0 or later\n"); | |
510 | goto abort; | |
511 | } else { | |
512 | mdu_array_info_t inf; | |
513 | memset(&inf, 0, sizeof(inf)); | |
514 | ioctl(mdfd, GET_ARRAY_INFO, &inf); | |
515 | if (inf.working_disks != 0) { | |
516 | fprintf(stderr, Name ": another array by this name" | |
517 | " is already running.\n"); | |
518 | goto abort; | |
519 | } | |
520 | } | |
a04d5763 | 521 | |
682c7051 NB |
522 | /* Ok, lets try some ioctls */ |
523 | ||
06c7f68e NB |
524 | info.array.level = level; |
525 | info.array.size = size; | |
526 | info.array.raid_disks = raiddisks; | |
82b27616 NB |
527 | /* The kernel should *know* what md_minor we are dealing |
528 | * with, but it chooses to trust me instead. Sigh | |
529 | */ | |
06c7f68e | 530 | info.array.md_minor = 0; |
82b27616 | 531 | if (fstat(mdfd, &stb)==0) |
06c7f68e NB |
532 | info.array.md_minor = minor(stb.st_rdev); |
533 | info.array.not_persistent = 0; | |
6fb79233 | 534 | |
66f8bbbe | 535 | if ( ( (level == 4 || level == 5) && |
b5e64645 NB |
536 | (insert_point < raiddisks || first_missing < raiddisks) ) |
537 | || | |
6fb79233 NB |
538 | ( level == 6 && (insert_point < raiddisks |
539 | || second_missing < raiddisks)) | |
47d79ef8 | 540 | || |
d024b0a7 NB |
541 | ( level <= 0 ) |
542 | || | |
47d79ef8 | 543 | assume_clean |
103f2410 | 544 | ) { |
06c7f68e | 545 | info.array.state = 1; /* clean, but one+ drive will be missing*/ |
b7528a20 | 546 | info.resync_start = MaxSector; |
103f2410 | 547 | } else { |
06c7f68e | 548 | info.array.state = 0; /* not clean, but no errors */ |
103f2410 NB |
549 | info.resync_start = 0; |
550 | } | |
f9c25f1d NB |
551 | if (level == 10) { |
552 | /* for raid10, the bitmap size is the capacity of the array, | |
553 | * which is array.size * raid_disks / ncopies; | |
554 | * .. but convert to sectors. | |
555 | */ | |
702b557b | 556 | int ncopies = ((layout>>8) & 255) * (layout & 255); |
5dd497ee NB |
557 | bitmapsize = (unsigned long long)size * raiddisks / ncopies * 2; |
558 | /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, size, raiddisks, ncopies);*/ | |
f9c25f1d | 559 | } else |
5dd497ee | 560 | bitmapsize = (unsigned long long)size * 2; |
f9c25f1d | 561 | |
82b27616 NB |
562 | /* There is lots of redundancy in these disk counts, |
563 | * raid_disks is the most meaningful value | |
564 | * it describes the geometry of the array | |
565 | * it is constant | |
566 | * nr_disks is total number of used slots. | |
567 | * it should be raid_disks+spare_disks | |
568 | * spare_disks is the number of extra disks present | |
569 | * see above | |
570 | * active_disks is the number of working disks in | |
571 | * active slots. (With raid_disks) | |
572 | * working_disks is the total number of working disks, | |
573 | * including spares | |
574 | * failed_disks is the number of disks marked failed | |
575 | * | |
576 | * Ideally, the kernel would keep these (except raid_disks) | |
577 | * up-to-date as we ADD_NEW_DISK, but it doesn't (yet). | |
578 | * So for now, we assume that all raid and spare | |
579 | * devices will be given. | |
580 | */ | |
06c7f68e NB |
581 | info.array.spare_disks=sparedisks; |
582 | info.array.failed_disks=missing_disks; | |
583 | info.array.nr_disks = info.array.working_disks | |
584 | + info.array.failed_disks; | |
585 | info.array.layout = layout; | |
586 | info.array.chunk_size = chunk*1024; | |
82d9eba6 | 587 | |
b3b33eb5 NB |
588 | if (name == NULL || *name == 0) { |
589 | /* base name on mddev */ | |
d1e80164 NB |
590 | /* /dev/md0 -> 0 |
591 | * /dev/md_d0 -> d0 | |
592 | * /dev/md/1 -> 1 | |
593 | * /dev/md/d1 -> d1 | |
594 | * /dev/md/home -> home | |
595 | * /dev/mdhome -> home | |
596 | */ | |
69207ff6 | 597 | /* FIXME compare this with rules in create_mddev */ |
b3b33eb5 NB |
598 | name = strrchr(mddev, '/'); |
599 | if (name) { | |
600 | name++; | |
60248f74 NB |
601 | if (strncmp(name, "md_d", 4)==0 && |
602 | strlen(name) > 4 && | |
603 | isdigit(name[4]) && | |
b3b33eb5 | 604 | (name-mddev) == 5 /* /dev/ */) |
d1e80164 | 605 | name += 3; |
60248f74 NB |
606 | else if (strncmp(name, "md", 2)==0 && |
607 | strlen(name) > 2 && | |
608 | isdigit(name[2]) && | |
609 | (name-mddev) == 5 /* /dev/ */) | |
b3b33eb5 NB |
610 | name += 2; |
611 | } | |
612 | } | |
06c7f68e | 613 | if (!st->ss->init_super(st, &info.array, size, name, homehost, uuid)) |
7f91af49 | 614 | goto abort; |
682c7051 | 615 | |
d2ca6449 | 616 | total_slots = info.array.nr_disks; |
f35f2525 | 617 | sysfs_init(&info, mdfd, 0); |
a5d85af7 | 618 | st->ss->getinfo_super(st, &info, NULL); |
159c3a1a | 619 | |
f7f1b6a1 | 620 | if (did_default && verbose >= 0) { |
3c558363 | 621 | if (is_subarray(info.text_version)) { |
f7f1b6a1 NB |
622 | int dnum = devname2devnum(info.text_version+1); |
623 | char *path; | |
624 | int mdp = get_mdp_major(); | |
625 | struct mdinfo *mdi; | |
626 | if (dnum > 0) | |
627 | path = map_dev(MD_MAJOR, dnum, 1); | |
628 | else | |
629 | path = map_dev(mdp, (-1-dnum)<< 6, 1); | |
630 | ||
631 | mdi = sysfs_read(-1, dnum, GET_VERSION); | |
632 | ||
633 | fprintf(stderr, Name ": Creating array inside " | |
634 | "%s container %s\n", | |
635 | mdi?mdi->text_version:"managed", path); | |
636 | sysfs_free(mdi); | |
637 | } else | |
638 | fprintf(stderr, Name ": Defaulting to version" | |
639 | " %s metadata\n", info.text_version); | |
640 | } | |
b8ac1967 | 641 | |
ad5bc697 | 642 | map_update(&map, fd2devnum(mdfd), info.text_version, |
a04d5763 | 643 | info.uuid, chosen_name); |
ad5bc697 | 644 | map_unlock(&map); |
a04d5763 | 645 | |
dcec9ee5 | 646 | if (bitmap_file && vers < 9003) { |
943eafef | 647 | major_num = BITMAP_MAJOR_HOSTENDIAN; |
dcec9ee5 NB |
648 | #ifdef __BIG_ENDIAN |
649 | fprintf(stderr, Name ": Warning - bitmaps created on this kernel are not portable\n" | |
650 | " between different architectured. Consider upgrading the Linux kernel.\n"); | |
651 | #endif | |
652 | } | |
653 | ||
55935d51 NB |
654 | if (bitmap_file && strcmp(bitmap_file, "internal")==0) { |
655 | if ((vers%100) < 2) { | |
656 | fprintf(stderr, Name ": internal bitmaps not supported by this kernel.\n"); | |
7f91af49 | 657 | goto abort; |
55935d51 | 658 | } |
ebeb3663 N |
659 | if (!st->ss->add_internal_bitmap) { |
660 | fprintf(stderr, Name ": internal bitmaps not supported with %s metadata\n", | |
661 | st->ss->name); | |
662 | goto abort; | |
663 | } | |
3da92f27 | 664 | if (!st->ss->add_internal_bitmap(st, &bitmap_chunk, |
199171a2 | 665 | delay, write_behind, |
943eafef | 666 | bitmapsize, 1, major_num)) { |
55935d51 | 667 | fprintf(stderr, Name ": Given bitmap chunk size not supported.\n"); |
7f91af49 | 668 | goto abort; |
55935d51 NB |
669 | } |
670 | bitmap_file = NULL; | |
671 | } | |
672 | ||
673 | ||
f35f2525 | 674 | sysfs_init(&info, mdfd, 0); |
55935d51 | 675 | |
d1d599ea | 676 | if (st->ss->external && st->container_dev != NoMdDev) { |
f35f2525 N |
677 | /* member */ |
678 | ||
679 | /* When creating a member, we need to be careful | |
680 | * to negotiate with mdmon properly. | |
681 | * If it is already running, we cannot write to | |
682 | * the devices and must ask it to do that part. | |
683 | * If it isn't running, we write to the devices, | |
684 | * and then start it. | |
685 | * We hold an exclusive open on the container | |
686 | * device to make sure mdmon doesn't exit after | |
687 | * we checked that it is running. | |
688 | * | |
689 | * For now, fail if it is already running. | |
690 | */ | |
691 | container_fd = open_dev_excl(st->container_dev); | |
692 | if (container_fd < 0) { | |
693 | fprintf(stderr, Name ": Cannot get exclusive " | |
694 | "open on container - weird.\n"); | |
7f91af49 | 695 | goto abort; |
d03373f1 | 696 | } |
f35f2525 N |
697 | if (mdmon_running(st->container_dev)) { |
698 | if (verbose) | |
699 | fprintf(stderr, Name ": reusing mdmon " | |
700 | "for %s.\n", | |
701 | devnum2devname(st->container_dev)); | |
702 | st->update_tail = &st->updates; | |
703 | } else | |
704 | need_mdmon = 1; | |
705 | } | |
706 | rv = set_array_info(mdfd, st, &info); | |
82d9eba6 | 707 | if (rv) { |
f35f2525 | 708 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", |
52826846 | 709 | mddev, strerror(errno)); |
7f91af49 | 710 | goto abort; |
682c7051 | 711 | } |
52826846 | 712 | |
c82f047c NB |
713 | if (bitmap_file) { |
714 | int uuid[4]; | |
55935d51 | 715 | |
3da92f27 | 716 | st->ss->uuid_from_super(st, uuid); |
dfd4d8ee | 717 | if (CreateBitmap(bitmap_file, force, (char*)uuid, bitmap_chunk, |
dcec9ee5 | 718 | delay, write_behind, |
f9c25f1d | 719 | bitmapsize, |
943eafef | 720 | major_num)) { |
7f91af49 | 721 | goto abort; |
c82f047c NB |
722 | } |
723 | bitmap_fd = open(bitmap_file, O_RDWR); | |
724 | if (bitmap_fd < 0) { | |
725 | fprintf(stderr, Name ": weird: %s cannot be openned\n", | |
dcec9ee5 | 726 | bitmap_file); |
7f91af49 | 727 | goto abort; |
c82f047c NB |
728 | } |
729 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
730 | fprintf(stderr, Name ": Cannot set bitmap file for %s: %s\n", | |
731 | mddev, strerror(errno)); | |
7f91af49 | 732 | goto abort; |
c82f047c NB |
733 | } |
734 | } | |
735 | ||
d2ca6449 | 736 | infos = malloc(sizeof(*infos) * total_slots); |
4b1ac34b | 737 | |
4b1ac34b | 738 | for (pass=1; pass <=2 ; pass++) { |
a655e550 | 739 | struct mddev_dev *moved_disk = NULL; /* the disk that was moved out of the insert point */ |
4b1ac34b NB |
740 | |
741 | for (dnum=0, dv = devlist ; dv ; | |
742 | dv=(dv->next)?(dv->next):moved_disk, dnum++) { | |
743 | int fd; | |
744 | struct stat stb; | |
d2ca6449 | 745 | struct mdinfo *inf = &infos[dnum]; |
4b1ac34b | 746 | |
d2ca6449 NB |
747 | if (dnum >= total_slots) |
748 | abort(); | |
4b1ac34b NB |
749 | if (dnum == insert_point) { |
750 | moved_disk = dv; | |
8592f29d | 751 | continue; |
52826846 | 752 | } |
8592f29d | 753 | if (strcasecmp(dv->devname, "missing")==0) |
111d01fc | 754 | continue; |
8592f29d N |
755 | if (have_container) |
756 | moved_disk = NULL; | |
757 | if (have_container && dnum < info.array.raid_disks - 1) | |
758 | /* repeatedly use the container */ | |
759 | moved_disk = dv; | |
111d01fc | 760 | |
d2ca6449 NB |
761 | switch(pass) { |
762 | case 1: | |
763 | *inf = info; | |
5f8097be | 764 | |
d2ca6449 NB |
765 | inf->disk.number = dnum; |
766 | inf->disk.raid_disk = dnum; | |
767 | if (inf->disk.raid_disk < raiddisks) | |
768 | inf->disk.state = (1<<MD_DISK_ACTIVE) | | |
769 | (1<<MD_DISK_SYNC); | |
770 | else | |
771 | inf->disk.state = 0; | |
772 | ||
b01b06bd | 773 | if (dv->writemostly == 1) |
d2ca6449 NB |
774 | inf->disk.state |= (1<<MD_DISK_WRITEMOSTLY); |
775 | ||
8592f29d N |
776 | if (have_container) |
777 | fd = -1; | |
778 | else { | |
d1d599ea N |
779 | if (st->ss->external && |
780 | st->container_dev != NoMdDev) | |
8592f29d N |
781 | fd = open(dv->devname, O_RDWR); |
782 | else | |
783 | fd = open(dv->devname, O_RDWR|O_EXCL); | |
784 | ||
785 | if (fd < 0) { | |
786 | fprintf(stderr, Name ": failed to open %s " | |
787 | "after earlier success - aborting\n", | |
788 | dv->devname); | |
789 | goto abort; | |
790 | } | |
791 | fstat(fd, &stb); | |
792 | inf->disk.major = major(stb.st_rdev); | |
793 | inf->disk.minor = minor(stb.st_rdev); | |
d2ca6449 | 794 | } |
8592f29d N |
795 | if (fd >= 0) |
796 | remove_partitions(fd); | |
f20c3968 | 797 | if (st->ss->add_to_super(st, &inf->disk, |
4eb26970 DW |
798 | fd, dv->devname)) { |
799 | ioctl(mdfd, STOP_ARRAY, NULL); | |
f20c3968 | 800 | goto abort; |
4eb26970 | 801 | } |
a5d85af7 | 802 | st->ss->getinfo_super(st, inf, NULL); |
8ed3e5e1 | 803 | safe_mode_delay = inf->safe_mode_delay; |
d2ca6449 | 804 | |
8592f29d N |
805 | if (have_container && verbose > 0) |
806 | fprintf(stderr, Name ": Using %s for device %d\n", | |
807 | map_dev(inf->disk.major, | |
808 | inf->disk.minor, | |
809 | 0), dnum); | |
810 | ||
811 | if (!have_container) { | |
812 | /* getinfo_super might have lost these ... */ | |
813 | inf->disk.major = major(stb.st_rdev); | |
814 | inf->disk.minor = minor(stb.st_rdev); | |
815 | } | |
4b1ac34b NB |
816 | break; |
817 | case 2: | |
d2ca6449 | 818 | inf->errors = 0; |
2503d23b | 819 | rv = 0; |
4b1ac34b | 820 | |
f35f2525 | 821 | rv = add_disk(mdfd, st, &info, inf); |
d2ca6449 | 822 | |
2503d23b | 823 | if (rv) { |
d03373f1 NB |
824 | fprintf(stderr, |
825 | Name ": ADD_NEW_DISK for %s " | |
826 | "failed: %s\n", | |
4b1ac34b | 827 | dv->devname, strerror(errno)); |
7f91af49 | 828 | goto abort; |
4b1ac34b | 829 | } |
4b1ac34b NB |
830 | break; |
831 | } | |
8592f29d N |
832 | if (!have_container && |
833 | dv == moved_disk && dnum != insert_point) break; | |
52826846 | 834 | } |
edd8d13c | 835 | if (pass == 1) { |
9b1fb677 DW |
836 | struct mdinfo info_new; |
837 | struct map_ent *me = NULL; | |
838 | ||
839 | /* check to see if the uuid has changed due to these | |
840 | * metadata changes, and if so update the member array | |
841 | * and container uuid. Note ->write_init_super clears | |
842 | * the subarray cursor such that ->getinfo_super once | |
843 | * again returns container info. | |
844 | */ | |
845 | map_lock(&map); | |
a5d85af7 | 846 | st->ss->getinfo_super(st, &info_new, NULL); |
9b1fb677 DW |
847 | if (st->ss->external && level != LEVEL_CONTAINER && |
848 | !same_uuid(info_new.uuid, info.uuid, 0)) { | |
849 | map_update(&map, fd2devnum(mdfd), | |
850 | info_new.text_version, | |
851 | info_new.uuid, chosen_name); | |
852 | me = map_by_devnum(&map, st->container_dev); | |
853 | } | |
854 | ||
111d01fc | 855 | st->ss->write_init_super(st); |
9b1fb677 DW |
856 | |
857 | /* update parent container uuid */ | |
858 | if (me) { | |
859 | char *path = strdup(me->path); | |
860 | ||
a5d85af7 | 861 | st->ss->getinfo_super(st, &info_new, NULL); |
9b1fb677 DW |
862 | map_update(&map, st->container_dev, |
863 | info_new.text_version, | |
864 | info_new.uuid, path); | |
865 | free(path); | |
866 | } | |
867 | map_unlock(&map); | |
868 | ||
edd8d13c | 869 | flush_metadata_updates(st); |
6946681d | 870 | st->ss->free_super(st); |
edd8d13c | 871 | } |
5e52ae9e | 872 | } |
d2ca6449 | 873 | free(infos); |
5e52ae9e | 874 | |
97590376 N |
875 | if (level == LEVEL_CONTAINER) { |
876 | /* No need to start. But we should signal udev to | |
877 | * create links */ | |
878 | sysfs_uevent(&info, "change"); | |
ed034b11 N |
879 | if (verbose >= 0) |
880 | fprintf(stderr, Name ": container %s prepared.\n", mddev); | |
a7c6e3fb | 881 | wait_for(chosen_name, mdfd); |
97590376 | 882 | } else if (runstop == 1 || subdevs >= raiddisks) { |
598f0d58 | 883 | if (st->ss->external) { |
4c821454 | 884 | int err; |
598f0d58 NB |
885 | switch(level) { |
886 | case LEVEL_LINEAR: | |
887 | case LEVEL_MULTIPATH: | |
888 | case 0: | |
4c821454 N |
889 | err = sysfs_set_str(&info, NULL, "array_state", |
890 | "active"); | |
a931db9e | 891 | need_mdmon = 0; |
598f0d58 NB |
892 | break; |
893 | default: | |
4c821454 N |
894 | err = sysfs_set_str(&info, NULL, "array_state", |
895 | "readonly"); | |
598f0d58 NB |
896 | break; |
897 | } | |
f35f2525 | 898 | sysfs_set_safemode(&info, safe_mode_delay); |
4c821454 N |
899 | if (err) { |
900 | fprintf(stderr, Name ": failed to" | |
901 | " activate array.\n"); | |
902 | ioctl(mdfd, STOP_ARRAY, NULL); | |
903 | goto abort; | |
904 | } | |
598f0d58 | 905 | } else { |
97590376 | 906 | /* param is not actually used */ |
598f0d58 NB |
907 | mdu_param_t param; |
908 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { | |
909 | fprintf(stderr, Name ": RUN_ARRAY failed: %s\n", | |
910 | strerror(errno)); | |
4eb26970 | 911 | ioctl(mdfd, STOP_ARRAY, NULL); |
7f91af49 | 912 | goto abort; |
598f0d58 | 913 | } |
682c7051 | 914 | } |
dab6685f NB |
915 | if (verbose >= 0) |
916 | fprintf(stderr, Name ": array %s started.\n", mddev); | |
d1d599ea | 917 | if (st->ss->external && st->container_dev != NoMdDev) { |
8850ee3e N |
918 | if (need_mdmon) |
919 | start_mdmon(st->container_dev); | |
920 | ||
921 | ping_monitor(devnum2devname(st->container_dev)); | |
a931db9e NB |
922 | close(container_fd); |
923 | } | |
a7c6e3fb | 924 | wait_for(chosen_name, mdfd); |
682c7051 | 925 | } else { |
b83d95f3 | 926 | fprintf(stderr, Name ": not starting array - not enough devices.\n"); |
682c7051 | 927 | } |
7f91af49 | 928 | close(mdfd); |
682c7051 | 929 | return 0; |
7f91af49 N |
930 | |
931 | abort: | |
4eb26970 DW |
932 | map_lock(&map); |
933 | map_remove(&map, fd2devnum(mdfd)); | |
934 | map_unlock(&map); | |
935 | ||
7f91af49 N |
936 | if (mdfd >= 0) |
937 | close(mdfd); | |
938 | return 1; | |
64c4757e | 939 | } |