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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 | * |
6f02172d | 4 | * Copyright (C) 2001-2013 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 | ||
ca3b6696 | 25 | #include "mdadm.h" |
9f376da6 | 26 | #include "udev.h" |
682c7051 NB |
27 | #include "md_u.h" |
28 | #include "md_p.h" | |
60248f74 | 29 | #include <ctype.h> |
577fd104 LG |
30 | #include <fcntl.h> |
31 | #include <signal.h> | |
32 | #include <sys/signalfd.h> | |
33 | #include <sys/wait.h> | |
64c4757e | 34 | |
52bead95 FF |
35 | #ifndef FALLOC_FL_ZERO_RANGE |
36 | #define FALLOC_FL_ZERO_RANGE 16 | |
37 | #endif | |
38 | ||
22dc741f MT |
39 | static int round_size_and_verify(unsigned long long *size, int chunk) |
40 | { | |
41 | if (*size == 0) | |
42 | return 0; | |
43 | *size &= ~(unsigned long long)(chunk - 1); | |
44 | if (*size == 0) { | |
45 | pr_err("Size cannot be smaller than chunk.\n"); | |
46 | return 1; | |
47 | } | |
48 | return 0; | |
49 | } | |
50 | ||
913f07d1 MT |
51 | /** |
52 | * default_layout() - Get default layout for level. | |
53 | * @st: metadata requested, could be NULL. | |
54 | * @level: raid level requested. | |
55 | * @verbose: verbose level. | |
56 | * | |
57 | * Try to ask metadata handler first, otherwise use global defaults. | |
58 | * | |
59 | * Return: Layout or &UnSet, return value meaning depends of level used. | |
60 | */ | |
61 | int default_layout(struct supertype *st, int level, int verbose) | |
a18a888e DW |
62 | { |
63 | int layout = UnSet; | |
913f07d1 MT |
64 | mapping_t *layout_map = NULL; |
65 | char *layout_name = NULL; | |
a18a888e | 66 | |
30f58b22 DW |
67 | if (st && st->ss->default_geometry) |
68 | st->ss->default_geometry(st, &level, &layout, NULL); | |
a18a888e | 69 | |
913f07d1 MT |
70 | if (layout != UnSet) |
71 | return layout; | |
a18a888e | 72 | |
913f07d1 MT |
73 | switch (level) { |
74 | default: /* no layout */ | |
75 | layout = 0; | |
76 | break; | |
77 | case 0: | |
78 | layout = RAID0_ORIG_LAYOUT; | |
79 | break; | |
80 | case 10: | |
81 | layout = 0x102; /* near=2, far=1 */ | |
82 | layout_name = "n2"; | |
83 | break; | |
84 | case 5: | |
85 | case 6: | |
86 | layout_map = r5layout; | |
87 | break; | |
88 | case LEVEL_FAULTY: | |
89 | layout_map = faultylayout; | |
90 | break; | |
91 | } | |
92 | ||
93 | if (layout_map) { | |
94 | layout = map_name(layout_map, "default"); | |
5f21d674 | 95 | layout_name = map_num_s(layout_map, layout); |
913f07d1 MT |
96 | } |
97 | if (layout_name && verbose > 0) | |
98 | pr_err("layout defaults to %s\n", layout_name); | |
a18a888e DW |
99 | |
100 | return layout; | |
101 | } | |
102 | ||
577fd104 LG |
103 | static pid_t write_zeroes_fork(int fd, struct shape *s, struct supertype *st, |
104 | struct mddev_dev *dv) | |
105 | ||
106 | { | |
107 | const unsigned long long req_size = 1 << 30; | |
108 | unsigned long long offset_bytes, size_bytes, sz; | |
109 | sigset_t sigset; | |
110 | int ret = 0; | |
111 | pid_t pid; | |
112 | ||
113 | size_bytes = KIB_TO_BYTES(s->size); | |
114 | ||
115 | /* | |
116 | * If size_bytes is zero, this is a zoned raid array where | |
117 | * each disk is of a different size and uses its full | |
118 | * disk. Thus zero the entire disk. | |
119 | */ | |
120 | if (!size_bytes && !get_dev_size(fd, dv->devname, &size_bytes)) | |
121 | return -1; | |
122 | ||
123 | if (dv->data_offset != INVALID_SECTORS) | |
124 | offset_bytes = SEC_TO_BYTES(dv->data_offset); | |
125 | else | |
126 | offset_bytes = SEC_TO_BYTES(st->data_offset); | |
127 | ||
128 | pr_info("zeroing data from %lld to %lld on: %s\n", | |
129 | offset_bytes, size_bytes, dv->devname); | |
130 | ||
131 | pid = fork(); | |
132 | if (pid < 0) { | |
133 | pr_err("Could not fork to zero disks: %s\n", strerror(errno)); | |
134 | return pid; | |
135 | } else if (pid != 0) { | |
136 | return pid; | |
137 | } | |
138 | ||
139 | sigemptyset(&sigset); | |
140 | sigaddset(&sigset, SIGINT); | |
141 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
142 | ||
143 | while (size_bytes) { | |
144 | /* | |
145 | * Split requests to the kernel into 1GB chunks seeing the | |
146 | * fallocate() call is not interruptible and blocking a | |
147 | * ctrl-c for several minutes is not desirable. | |
148 | * | |
149 | * 1GB is chosen as a compromise: the user may still have | |
150 | * to wait several seconds if they ctrl-c on devices that | |
151 | * zero slowly, but will reduce the number of requests | |
152 | * required and thus the overhead on devices that perform | |
153 | * better. | |
154 | */ | |
155 | sz = size_bytes; | |
156 | if (sz >= req_size) | |
157 | sz = req_size; | |
158 | ||
159 | if (fallocate(fd, FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE, | |
160 | offset_bytes, sz)) { | |
161 | pr_err("zeroing %s failed: %s\n", dv->devname, | |
162 | strerror(errno)); | |
163 | ret = 1; | |
164 | break; | |
165 | } | |
166 | ||
167 | offset_bytes += sz; | |
168 | size_bytes -= sz; | |
169 | } | |
170 | ||
171 | exit(ret); | |
172 | } | |
173 | ||
174 | static int wait_for_zero_forks(int *zero_pids, int count) | |
175 | { | |
176 | int wstatus, ret = 0, i, sfd, wait_count = 0; | |
177 | struct signalfd_siginfo fdsi; | |
178 | bool interrupted = false; | |
179 | sigset_t sigset; | |
180 | ssize_t s; | |
181 | ||
182 | for (i = 0; i < count; i++) | |
183 | if (zero_pids[i]) | |
184 | wait_count++; | |
185 | if (!wait_count) | |
186 | return 0; | |
187 | ||
188 | sigemptyset(&sigset); | |
189 | sigaddset(&sigset, SIGINT); | |
190 | sigaddset(&sigset, SIGCHLD); | |
191 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
192 | ||
193 | sfd = signalfd(-1, &sigset, 0); | |
194 | if (sfd < 0) { | |
195 | pr_err("Unable to create signalfd: %s\n", strerror(errno)); | |
196 | return 1; | |
197 | } | |
198 | ||
199 | while (1) { | |
200 | s = read(sfd, &fdsi, sizeof(fdsi)); | |
201 | if (s != sizeof(fdsi)) { | |
202 | pr_err("Invalid signalfd read: %s\n", strerror(errno)); | |
203 | close(sfd); | |
204 | return 1; | |
205 | } | |
206 | ||
207 | if (fdsi.ssi_signo == SIGINT) { | |
208 | printf("\n"); | |
209 | pr_info("Interrupting zeroing processes, please wait...\n"); | |
210 | interrupted = true; | |
211 | } else if (fdsi.ssi_signo == SIGCHLD) { | |
212 | if (!--wait_count) | |
213 | break; | |
214 | } | |
215 | } | |
216 | ||
217 | close(sfd); | |
218 | ||
219 | for (i = 0; i < count; i++) { | |
220 | if (!zero_pids[i]) | |
221 | continue; | |
222 | ||
223 | waitpid(zero_pids[i], &wstatus, 0); | |
224 | zero_pids[i] = 0; | |
225 | if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus)) | |
226 | ret = 1; | |
227 | } | |
228 | ||
229 | if (interrupted) { | |
230 | pr_err("zeroing interrupted!\n"); | |
231 | return 1; | |
232 | } | |
233 | ||
234 | if (ret) | |
235 | pr_err("zeroing failed!\n"); | |
236 | else | |
237 | pr_info("zeroing finished\n"); | |
238 | ||
239 | return ret; | |
240 | } | |
241 | ||
8a4ce2c0 LG |
242 | static int add_disk_to_super(int mdfd, struct shape *s, struct context *c, |
243 | struct supertype *st, struct mddev_dev *dv, | |
577fd104 LG |
244 | struct mdinfo *info, int have_container, int major_num, |
245 | int *zero_pid) | |
8a4ce2c0 LG |
246 | { |
247 | dev_t rdev; | |
248 | int fd; | |
249 | ||
250 | if (dv->disposition == 'j') { | |
251 | info->disk.raid_disk = MD_DISK_ROLE_JOURNAL; | |
252 | info->disk.state = (1<<MD_DISK_JOURNAL); | |
253 | } else if (info->disk.raid_disk < s->raiddisks) { | |
254 | info->disk.state = (1<<MD_DISK_ACTIVE) | | |
255 | (1<<MD_DISK_SYNC); | |
256 | } else { | |
257 | info->disk.state = 0; | |
258 | } | |
259 | ||
260 | if (dv->writemostly == FlagSet) { | |
261 | if (major_num == BITMAP_MAJOR_CLUSTERED) { | |
262 | pr_err("Can not set %s --write-mostly with a clustered bitmap\n",dv->devname); | |
263 | return 1; | |
264 | } else { | |
265 | info->disk.state |= (1<<MD_DISK_WRITEMOSTLY); | |
266 | } | |
267 | ||
268 | } | |
269 | ||
270 | if (dv->failfast == FlagSet) | |
271 | info->disk.state |= (1<<MD_DISK_FAILFAST); | |
272 | ||
273 | if (have_container) { | |
274 | fd = -1; | |
275 | } else { | |
276 | if (st->ss->external && st->container_devnm[0]) | |
277 | fd = open(dv->devname, O_RDWR); | |
278 | else | |
279 | fd = open(dv->devname, O_RDWR|O_EXCL); | |
280 | ||
281 | if (fd < 0) { | |
282 | pr_err("failed to open %s after earlier success - aborting\n", | |
283 | dv->devname); | |
284 | return 1; | |
285 | } | |
b8f5523a MK |
286 | if (!fstat_is_blkdev(fd, dv->devname, &rdev)) { |
287 | close(fd); | |
8a4ce2c0 | 288 | return 1; |
b8f5523a | 289 | } |
8a4ce2c0 LG |
290 | info->disk.major = major(rdev); |
291 | info->disk.minor = minor(rdev); | |
292 | } | |
293 | if (fd >= 0) | |
294 | remove_partitions(fd); | |
295 | if (st->ss->add_to_super(st, &info->disk, fd, dv->devname, | |
296 | dv->data_offset)) { | |
297 | ioctl(mdfd, STOP_ARRAY, NULL); | |
b8f5523a | 298 | close(fd); |
8a4ce2c0 LG |
299 | return 1; |
300 | } | |
301 | st->ss->getinfo_super(st, info, NULL); | |
302 | ||
577fd104 LG |
303 | if (fd >= 0 && s->write_zeroes) { |
304 | *zero_pid = write_zeroes_fork(fd, s, st, dv); | |
305 | if (*zero_pid <= 0) { | |
306 | ioctl(mdfd, STOP_ARRAY, NULL); | |
b8f5523a | 307 | close(fd); |
577fd104 LG |
308 | return 1; |
309 | } | |
310 | } | |
311 | ||
8a4ce2c0 LG |
312 | if (have_container && c->verbose > 0) |
313 | pr_err("Using %s for device %d\n", | |
314 | map_dev(info->disk.major, info->disk.minor, 0), | |
315 | info->disk.number); | |
316 | ||
317 | if (!have_container) { | |
318 | /* getinfo_super might have lost these ... */ | |
319 | info->disk.major = major(rdev); | |
320 | info->disk.minor = minor(rdev); | |
321 | } | |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
326 | static int update_metadata(int mdfd, struct shape *s, struct supertype *st, | |
327 | struct map_ent **map, struct mdinfo *info, | |
328 | char *chosen_name) | |
329 | { | |
330 | struct mdinfo info_new; | |
331 | struct map_ent *me = NULL; | |
332 | ||
333 | /* check to see if the uuid has changed due to these | |
334 | * metadata changes, and if so update the member array | |
335 | * and container uuid. Note ->write_init_super clears | |
336 | * the subarray cursor such that ->getinfo_super once | |
337 | * again returns container info. | |
338 | */ | |
339 | st->ss->getinfo_super(st, &info_new, NULL); | |
ef6236da | 340 | if (st->ss->external && !is_container(s->level) && |
8a4ce2c0 LG |
341 | !same_uuid(info_new.uuid, info->uuid, 0)) { |
342 | map_update(map, fd2devnm(mdfd), | |
343 | info_new.text_version, | |
344 | info_new.uuid, chosen_name); | |
345 | me = map_by_devnm(map, st->container_devnm); | |
346 | } | |
347 | ||
348 | if (st->ss->write_init_super(st)) { | |
349 | st->ss->free_super(st); | |
350 | return 1; | |
351 | } | |
352 | ||
353 | /* | |
354 | * Before activating the array, perform extra steps | |
355 | * required to configure the internal write-intent | |
356 | * bitmap. | |
357 | */ | |
358 | if (info_new.consistency_policy == CONSISTENCY_POLICY_BITMAP && | |
359 | st->ss->set_bitmap && st->ss->set_bitmap(st, info)) { | |
360 | st->ss->free_super(st); | |
361 | return 1; | |
362 | } | |
363 | ||
364 | /* update parent container uuid */ | |
365 | if (me) { | |
366 | char *path = xstrdup(me->path); | |
367 | ||
368 | st->ss->getinfo_super(st, &info_new, NULL); | |
369 | map_update(map, st->container_devnm, info_new.text_version, | |
370 | info_new.uuid, path); | |
371 | free(path); | |
372 | } | |
373 | ||
374 | flush_metadata_updates(st); | |
375 | st->ss->free_super(st); | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
380 | static int add_disks(int mdfd, struct mdinfo *info, struct shape *s, | |
381 | struct context *c, struct supertype *st, | |
382 | struct map_ent **map, struct mddev_dev *devlist, | |
383 | int total_slots, int have_container, int insert_point, | |
384 | int major_num, char *chosen_name) | |
385 | { | |
386 | struct mddev_dev *moved_disk = NULL; | |
387 | int pass, raid_disk_num, dnum; | |
577fd104 | 388 | int zero_pids[total_slots]; |
8a4ce2c0 LG |
389 | struct mddev_dev *dv; |
390 | struct mdinfo *infos; | |
577fd104 | 391 | sigset_t sigset, orig_sigset; |
8a4ce2c0 LG |
392 | int ret = 0; |
393 | ||
577fd104 LG |
394 | /* |
395 | * Block SIGINT so the main thread will always wait for the | |
396 | * zeroing processes when being interrupted. Otherwise the | |
397 | * zeroing processes will finish their work in the background | |
398 | * keeping the disk busy. | |
399 | */ | |
400 | sigemptyset(&sigset); | |
401 | sigaddset(&sigset, SIGINT); | |
402 | sigprocmask(SIG_BLOCK, &sigset, &orig_sigset); | |
403 | memset(zero_pids, 0, sizeof(zero_pids)); | |
404 | ||
8a4ce2c0 LG |
405 | infos = xmalloc(sizeof(*infos) * total_slots); |
406 | enable_fds(total_slots); | |
407 | for (pass = 1; pass <= 2; pass++) { | |
408 | for (dnum = 0, raid_disk_num = 0, dv = devlist; dv; | |
409 | dv = (dv->next) ? (dv->next) : moved_disk, dnum++) { | |
410 | if (dnum >= total_slots) | |
411 | abort(); | |
412 | if (dnum == insert_point) { | |
413 | raid_disk_num += 1; | |
414 | moved_disk = dv; | |
415 | continue; | |
416 | } | |
417 | if (strcasecmp(dv->devname, "missing") == 0) { | |
418 | raid_disk_num += 1; | |
419 | continue; | |
420 | } | |
421 | if (have_container) | |
422 | moved_disk = NULL; | |
423 | if (have_container && dnum < total_slots - 1) | |
424 | /* repeatedly use the container */ | |
425 | moved_disk = dv; | |
426 | ||
427 | switch(pass) { | |
428 | case 1: | |
429 | infos[dnum] = *info; | |
430 | infos[dnum].disk.number = dnum; | |
431 | infos[dnum].disk.raid_disk = raid_disk_num++; | |
432 | ||
433 | if (dv->disposition == 'j') | |
434 | raid_disk_num--; | |
435 | ||
436 | ret = add_disk_to_super(mdfd, s, c, st, dv, | |
437 | &infos[dnum], have_container, | |
577fd104 | 438 | major_num, &zero_pids[dnum]); |
8a4ce2c0 LG |
439 | if (ret) |
440 | goto out; | |
441 | ||
442 | break; | |
443 | case 2: | |
444 | infos[dnum].errors = 0; | |
445 | ||
446 | ret = add_disk(mdfd, st, info, &infos[dnum]); | |
447 | if (ret) { | |
448 | pr_err("ADD_NEW_DISK for %s failed: %s\n", | |
449 | dv->devname, strerror(errno)); | |
450 | if (errno == EINVAL && | |
451 | info->array.level == 0) { | |
452 | pr_err("Possibly your kernel doesn't support RAID0 layouts.\n"); | |
453 | pr_err("Either upgrade, or use --layout=dangerous\n"); | |
454 | } | |
455 | goto out; | |
456 | } | |
457 | break; | |
458 | } | |
459 | if (!have_container && | |
460 | dv == moved_disk && dnum != insert_point) break; | |
461 | } | |
462 | ||
463 | if (pass == 1) { | |
577fd104 LG |
464 | ret = wait_for_zero_forks(zero_pids, total_slots); |
465 | if (ret) | |
466 | goto out; | |
467 | ||
8a4ce2c0 LG |
468 | ret = update_metadata(mdfd, s, st, map, info, |
469 | chosen_name); | |
470 | if (ret) | |
471 | goto out; | |
472 | } | |
473 | } | |
474 | ||
475 | out: | |
577fd104 LG |
476 | if (ret) |
477 | wait_for_zero_forks(zero_pids, total_slots); | |
8a4ce2c0 | 478 | free(infos); |
577fd104 | 479 | sigprocmask(SIG_SETMASK, &orig_sigset, NULL); |
8a4ce2c0 LG |
480 | return ret; |
481 | } | |
482 | ||
330c07f8 MT |
483 | int Create(struct supertype *st, struct mddev_ident *ident, int subdevs, |
484 | struct mddev_dev *devlist, struct shape *s, struct context *c) | |
64c4757e | 485 | { |
682c7051 NB |
486 | /* |
487 | * Create a new raid array. | |
488 | * | |
489 | * First check that necessary details are available | |
490 | * (i.e. level, raid-disks) | |
491 | * | |
492 | * Then check each disk to see what might be on it | |
493 | * and report anything interesting. | |
494 | * | |
495 | * If anything looks odd, and runstop not set, | |
496 | * abort. | |
497 | * | |
498 | * SET_ARRAY_INFO and ADD_NEW_DISK, and | |
82d9eba6 | 499 | * if runstop==run, or raiddisks disks were used, |
682c7051 NB |
500 | * RUN_ARRAY |
501 | */ | |
7f91af49 | 502 | int mdfd; |
98dbf73c | 503 | unsigned long long minsize = 0, maxsize = 0; |
f5a39b66 | 504 | dev_policy_t *custom_pols = NULL; |
cd29a5c8 NB |
505 | char *mindisc = NULL; |
506 | char *maxdisc = NULL; | |
330c07f8 MT |
507 | char *name = ident->name; |
508 | int *uuid = ident->uuid_set == 1 ? ident->uuid : NULL; | |
8a4ce2c0 | 509 | int dnum; |
a655e550 | 510 | struct mddev_dev *dv; |
0a6bff09 | 511 | dev_t rdev; |
98dbf73c | 512 | int fail = 0, warn = 0; |
82d9eba6 | 513 | int first_missing = subdevs * 2; |
6fb79233 | 514 | int second_missing = subdevs * 2; |
52826846 | 515 | int missing_disks = 0; |
82d9eba6 | 516 | int insert_point = subdevs * 2; /* where to insert a missing drive */ |
d2ca6449 | 517 | int total_slots; |
82d9eba6 | 518 | int rv; |
c82f047c | 519 | int bitmap_fd; |
5f8097be | 520 | int have_container = 0; |
0e600426 | 521 | int container_fd = -1; |
a931db9e | 522 | int need_mdmon = 0; |
f9c25f1d | 523 | unsigned long long bitmapsize; |
8a4ce2c0 | 524 | struct mdinfo info; |
b8ac1967 | 525 | int did_default = 0; |
a18a888e | 526 | int do_default_layout = 0; |
c21e737b | 527 | int do_default_chunk = 0; |
a04d5763 | 528 | char chosen_name[1024]; |
ad5bc697 | 529 | struct map_ent *map = NULL; |
8592f29d | 530 | unsigned long long newsize; |
5f4cc239 | 531 | mdu_array_info_t inf; |
682c7051 | 532 | |
943eafef | 533 | int major_num = BITMAP_MAJOR_HI; |
82d9485e | 534 | if (s->bitmap_file && strcmp(s->bitmap_file, "clustered") == 0) { |
6d9c7c25 | 535 | major_num = BITMAP_MAJOR_CLUSTERED; |
82d9485e GJ |
536 | if (c->nodes <= 1) { |
537 | pr_err("At least 2 nodes are needed for cluster-md\n"); | |
538 | return 1; | |
539 | } | |
540 | } | |
dcec9ee5 | 541 | |
06c7f68e | 542 | memset(&info, 0, sizeof(info)); |
99cc42f4 N |
543 | if (s->level == UnSet && st && st->ss->default_geometry) |
544 | st->ss->default_geometry(st, &s->level, NULL, NULL); | |
545 | if (s->level == UnSet) { | |
e7b84f9d | 546 | pr_err("a RAID level is needed to create an array.\n"); |
682c7051 NB |
547 | return 1; |
548 | } | |
99cc42f4 | 549 | if (s->raiddisks < 4 && s->level == 6) { |
e7b84f9d | 550 | pr_err("at least 4 raid-devices needed for level 6\n"); |
98c6faba NB |
551 | return 1; |
552 | } | |
99cc42f4 | 553 | if (s->raiddisks > 256 && s->level == 6) { |
e7b84f9d | 554 | pr_err("no more than 256 raid-devices supported for level 6\n"); |
98c6faba NB |
555 | return 1; |
556 | } | |
99cc42f4 | 557 | if (s->raiddisks < 2 && s->level >= 4) { |
f7889e51 | 558 | pr_err("at least 2 raid-devices needed for level %d\n", s->level); |
52826846 NB |
559 | return 1; |
560 | } | |
99cc42f4 | 561 | if (s->level <= 0 && s->sparedisks) { |
e7b84f9d | 562 | pr_err("This level does not support spare devices\n"); |
570510ba NB |
563 | return 1; |
564 | } | |
5f8097be NB |
565 | |
566 | if (subdevs == 1 && strcmp(devlist->devname, "missing") != 0) { | |
567 | /* If given a single device, it might be a container, and we can | |
568 | * extract a device list from there | |
569 | */ | |
5f8097be NB |
570 | int fd; |
571 | ||
572 | memset(&inf, 0, sizeof(inf)); | |
37ea3936 | 573 | fd = open(devlist->devname, O_RDONLY); |
5f8097be | 574 | if (fd >= 0 && |
9cd39f01 | 575 | md_get_array_info(fd, &inf) == 0 && inf.raid_disks == 0) { |
5f8097be NB |
576 | /* yep, looks like a container */ |
577 | if (st) { | |
0fb69d1d N |
578 | rv = st->ss->load_container(st, fd, |
579 | devlist->devname); | |
5f8097be NB |
580 | if (rv == 0) |
581 | have_container = 1; | |
582 | } else { | |
0fb69d1d | 583 | st = super_by_fd(fd, NULL); |
5f8097be | 584 | if (st && !(rv = st->ss-> |
0fb69d1d N |
585 | load_container(st, fd, |
586 | devlist->devname))) | |
5f8097be NB |
587 | have_container = 1; |
588 | else | |
589 | st = NULL; | |
590 | } | |
18fde300 | 591 | if (have_container) { |
99cc42f4 | 592 | subdevs = s->raiddisks; |
18fde300 DW |
593 | first_missing = subdevs * 2; |
594 | second_missing = subdevs * 2; | |
595 | insert_point = subdevs * 2; | |
f5a39b66 MT |
596 | |
597 | if (mddev_test_and_add_drive_policies(st, &custom_pols, fd, 1)) | |
598 | exit(1); | |
18fde300 | 599 | } |
5f8097be NB |
600 | } |
601 | if (fd >= 0) | |
602 | close(fd); | |
5f8097be | 603 | } |
99cc42f4 | 604 | if (st && st->ss->external && s->sparedisks) { |
7a862a02 | 605 | pr_err("This metadata type does not support spare disks at create time\n"); |
ffcfc735 N |
606 | return 1; |
607 | } | |
cc1799c3 | 608 | if (subdevs > s->raiddisks+s->sparedisks+s->journaldisks) { |
99cc42f4 | 609 | pr_err("You have listed more devices (%d) than are in the array(%d)!\n", subdevs, s->raiddisks+s->sparedisks); |
52826846 | 610 | return 1; |
682c7051 | 611 | } |
cc1799c3 | 612 | if (!have_container && subdevs < s->raiddisks+s->sparedisks+s->journaldisks) { |
e7b84f9d | 613 | pr_err("You haven't given enough devices (real or missing) to create this array\n"); |
52826846 NB |
614 | return 1; |
615 | } | |
99cc42f4 | 616 | if (s->bitmap_file && s->level <= 0) { |
e7b84f9d | 617 | pr_err("bitmaps not meaningful with level %s\n", |
99cc42f4 | 618 | map_num(pers, s->level)?:"given"); |
5b28bd56 NB |
619 | return 1; |
620 | } | |
52826846 | 621 | |
682c7051 | 622 | /* now set some defaults */ |
b5e64645 | 623 | |
99cc42f4 | 624 | if (s->layout == UnSet) { |
a18a888e | 625 | do_default_layout = 1; |
99cc42f4 | 626 | s->layout = default_layout(st, s->level, c->verbose); |
a18a888e | 627 | } |
682c7051 | 628 | |
99cc42f4 | 629 | if (s->level == 10) |
e5329c37 | 630 | /* check layout fits in array*/ |
99cc42f4 | 631 | if ((s->layout&255) * ((s->layout>>8)&255) > s->raiddisks) { |
e7b84f9d | 632 | pr_err("that layout requires at least %d devices\n", |
99cc42f4 | 633 | (s->layout&255) * ((s->layout>>8)&255)); |
e5329c37 NB |
634 | return 1; |
635 | } | |
636 | ||
99cc42f4 | 637 | switch(s->level) { |
aa88f531 NB |
638 | case 4: |
639 | case 5: | |
e5329c37 | 640 | case 10: |
98c6faba | 641 | case 6: |
aa88f531 | 642 | case 0: |
99cc42f4 N |
643 | if (s->chunk == 0 || s->chunk == UnSet) { |
644 | s->chunk = UnSet; | |
c21e737b CA |
645 | do_default_chunk = 1; |
646 | /* chunk will be set later */ | |
bb7295f1 | 647 | } |
5f175898 N |
648 | break; |
649 | case LEVEL_LINEAR: | |
650 | /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */ | |
aa88f531 | 651 | break; |
570510ba | 652 | case 1: |
08e43379 | 653 | case LEVEL_FAULTY: |
570510ba | 654 | case LEVEL_MULTIPATH: |
17f25ca6 | 655 | case LEVEL_CONTAINER: |
99cc42f4 | 656 | if (s->chunk) { |
5b30a34a MG |
657 | pr_err("specifying chunk size is forbidden for this level\n"); |
658 | return 1; | |
aa88f531 NB |
659 | } |
660 | break; | |
570510ba | 661 | default: |
99cc42f4 | 662 | pr_err("unknown level %d\n", s->level); |
570510ba | 663 | return 1; |
682c7051 | 664 | } |
22dc741f | 665 | |
99cc42f4 | 666 | if (s->size == MAX_SIZE) |
d04f65f4 | 667 | /* use '0' to mean 'max' now... */ |
99cc42f4 N |
668 | s->size = 0; |
669 | if (s->size && s->chunk && s->chunk != UnSet) | |
22dc741f MT |
670 | if (round_size_and_verify(&s->size, s->chunk)) |
671 | return 1; | |
672 | ||
99cc42f4 N |
673 | newsize = s->size * 2; |
674 | if (st && ! st->ss->validate_geometry(st, s->level, s->layout, s->raiddisks, | |
af4348dd | 675 | &s->chunk, s->size*2, |
ae5dfc56 | 676 | s->data_offset, NULL, |
5308f117 | 677 | &newsize, s->consistency_policy, |
98dbf73c | 678 | c->verbose >= 0)) |
17f25ca6 | 679 | return 1; |
bb7295f1 | 680 | |
99cc42f4 N |
681 | if (s->chunk && s->chunk != UnSet) { |
682 | newsize &= ~(unsigned long long)(s->chunk*2 - 1); | |
64385908 CA |
683 | if (do_default_chunk) { |
684 | /* default chunk was just set */ | |
171dccc8 | 685 | if (c->verbose > 0) |
7a862a02 | 686 | pr_err("chunk size defaults to %dK\n", s->chunk); |
22dc741f MT |
687 | if (round_size_and_verify(&s->size, s->chunk)) |
688 | return 1; | |
64385908 CA |
689 | do_default_chunk = 0; |
690 | } | |
bb7295f1 | 691 | } |
64385908 | 692 | |
99cc42f4 N |
693 | if (s->size == 0) { |
694 | s->size = newsize / 2; | |
695 | if (s->level == 1) | |
ae6c05ad N |
696 | /* If this is ever reshaped to RAID5, we will |
697 | * need a chunksize. So round it off a bit | |
698 | * now just to be safe | |
699 | */ | |
99cc42f4 | 700 | s->size &= ~(64ULL-1); |
ae6c05ad | 701 | |
99cc42f4 N |
702 | if (s->size && c->verbose > 0) |
703 | pr_err("setting size to %lluK\n", s->size); | |
8592f29d | 704 | } |
17f25ca6 | 705 | |
682c7051 | 706 | /* now look at the subdevs */ |
06c7f68e NB |
707 | info.array.active_disks = 0; |
708 | info.array.working_disks = 0; | |
c913b90e | 709 | dnum = 0; |
98dbf73c | 710 | for (dv = devlist; dv; dv = dv->next) |
ae5dfc56 | 711 | if (s->data_offset == VARIABLE_OFFSET) |
476066a3 N |
712 | dv->data_offset = INVALID_SECTORS; |
713 | else | |
ae5dfc56 | 714 | dv->data_offset = s->data_offset; |
476066a3 | 715 | |
8592f29d | 716 | for (dv=devlist; dv && !have_container; dv=dv->next, dnum++) { |
cd29a5c8 | 717 | char *dname = dv->devname; |
17f25ca6 | 718 | unsigned long long freesize; |
e9b11fee | 719 | int dfd; |
72ca9bcf | 720 | char *doff; |
e9b11fee | 721 | |
98dbf73c | 722 | if (strcasecmp(dname, "missing") == 0) { |
c913b90e NB |
723 | if (first_missing > dnum) |
724 | first_missing = dnum; | |
6fb79233 NB |
725 | if (second_missing > dnum && dnum > first_missing) |
726 | second_missing = dnum; | |
52826846 NB |
727 | missing_disks ++; |
728 | continue; | |
729 | } | |
ae5dfc56 | 730 | if (s->data_offset == VARIABLE_OFFSET) { |
72ca9bcf N |
731 | doff = strchr(dname, ':'); |
732 | if (doff) { | |
733 | *doff++ = 0; | |
734 | dv->data_offset = parse_size(doff); | |
735 | } else | |
736 | dv->data_offset = INVALID_SECTORS; | |
737 | } else | |
ae5dfc56 | 738 | dv->data_offset = s->data_offset; |
72ca9bcf | 739 | |
58b3c697 | 740 | dfd = open(dname, O_RDONLY); |
e9b11fee | 741 | if (dfd < 0) { |
e7b84f9d | 742 | pr_err("cannot open %s: %s\n", |
e9b11fee N |
743 | dname, strerror(errno)); |
744 | exit(2); | |
745 | } | |
0a6bff09 | 746 | if (!fstat_is_blkdev(dfd, dname, NULL)) { |
e9b11fee | 747 | close(dfd); |
e9b11fee N |
748 | exit(2); |
749 | } | |
f5a39b66 | 750 | |
06c7f68e | 751 | info.array.working_disks++; |
dfd7822c | 752 | if (dnum < s->raiddisks && dv->disposition != 'j') |
06c7f68e | 753 | info.array.active_disks++; |
058574b1 | 754 | if (st == NULL) { |
8aec876d | 755 | struct createinfo *ci = conf_get_create_info(); |
058574b1 NB |
756 | if (ci) |
757 | st = ci->supertype; | |
758 | } | |
576d6d83 NB |
759 | if (st == NULL) { |
760 | /* Need to choose a default metadata, which is different | |
17f25ca6 | 761 | * depending on geometry of array. |
576d6d83 NB |
762 | */ |
763 | int i; | |
764 | char *name = "default"; | |
98dbf73c | 765 | for(i = 0; !st && superlist[i]; i++) { |
576d6d83 | 766 | st = superlist[i]->match_metadata_desc(name); |
ecbd9e81 N |
767 | if (!st) |
768 | continue; | |
a18a888e | 769 | if (do_default_layout) |
99cc42f4 | 770 | s->layout = default_layout(st, s->level, c->verbose); |
ecbd9e81 | 771 | switch (st->ss->validate_geometry( |
99cc42f4 | 772 | st, s->level, s->layout, s->raiddisks, |
af4348dd | 773 | &s->chunk, s->size*2, |
72ca9bcf | 774 | dv->data_offset, dname, |
5308f117 AP |
775 | &freesize, s->consistency_policy, |
776 | c->verbose > 0)) { | |
ecbd9e81 N |
777 | case -1: /* Not valid, message printed, and not |
778 | * worth checking any further */ | |
779 | exit(2); | |
780 | break; | |
781 | case 0: /* Geometry not valid */ | |
55425f27 | 782 | free(st); |
17f25ca6 | 783 | st = NULL; |
99cc42f4 | 784 | s->chunk = do_default_chunk ? UnSet : s->chunk; |
ecbd9e81 N |
785 | break; |
786 | case 1: /* All happy */ | |
787 | break; | |
55425f27 | 788 | } |
17f25ca6 | 789 | } |
576d6d83 NB |
790 | |
791 | if (!st) { | |
58b3c697 N |
792 | int dfd = open(dname, O_RDONLY|O_EXCL); |
793 | if (dfd < 0) { | |
e7b84f9d | 794 | pr_err("cannot open %s: %s\n", |
58b3c697 N |
795 | dname, strerror(errno)); |
796 | exit(2); | |
797 | } | |
7a862a02 | 798 | pr_err("device %s not suitable for any style of array\n", |
17f25ca6 | 799 | dname); |
576d6d83 NB |
800 | exit(2); |
801 | } | |
b8ac1967 | 802 | if (st->ss != &super0 || |
576d6d83 | 803 | st->minor_version != 90) |
b8ac1967 | 804 | did_default = 1; |
17f25ca6 | 805 | } else { |
a18a888e | 806 | if (do_default_layout) |
99cc42f4 N |
807 | s->layout = default_layout(st, s->level, 0); |
808 | if (!st->ss->validate_geometry(st, s->level, s->layout, | |
809 | s->raiddisks, | |
af4348dd | 810 | &s->chunk, s->size*2, |
72ca9bcf | 811 | dv->data_offset, |
af4348dd | 812 | dname, &freesize, |
5308f117 | 813 | s->consistency_policy, |
171dccc8 | 814 | c->verbose >= 0)) { |
17f25ca6 | 815 | |
7a862a02 | 816 | pr_err("%s is not suitable for this array.\n", |
e7b84f9d | 817 | dname); |
17f25ca6 NB |
818 | fail = 1; |
819 | continue; | |
820 | } | |
682c7051 | 821 | } |
82d9eba6 | 822 | |
f5a39b66 MT |
823 | if (drive_test_and_add_policies(st, &custom_pols, dfd, 1)) |
824 | exit(1); | |
825 | ||
826 | close(dfd); | |
827 | ||
cc1799c3 | 828 | if (dv->disposition == 'j') |
dfd7822c | 829 | goto skip_size_check; /* skip write journal for size check */ |
cc1799c3 | 830 | |
82d9eba6 | 831 | freesize /= 2; /* convert to K */ |
99cc42f4 | 832 | if (s->chunk && s->chunk != UnSet) { |
d2cd3ffc | 833 | /* round to chunk size */ |
99cc42f4 | 834 | freesize = freesize & ~(s->chunk-1); |
64385908 CA |
835 | if (do_default_chunk) { |
836 | /* default chunk was just set */ | |
171dccc8 | 837 | if (c->verbose > 0) |
7a862a02 | 838 | pr_err("chunk size defaults to %dK\n", s->chunk); |
22dc741f MT |
839 | if (round_size_and_verify(&s->size, s->chunk)) |
840 | return 1; | |
64385908 CA |
841 | do_default_chunk = 0; |
842 | } | |
d2cd3ffc | 843 | } |
066e92f0 LD |
844 | if (!freesize) { |
845 | pr_err("no free space left on %s\n", dname); | |
846 | fail = 1; | |
847 | continue; | |
848 | } | |
682c7051 | 849 | |
99cc42f4 | 850 | if (s->size && freesize < s->size) { |
7a862a02 | 851 | pr_err("%s is smaller than given size. %lluK < %lluK + metadata\n", |
99cc42f4 | 852 | dname, freesize, s->size); |
52826846 | 853 | fail = 1; |
52826846 | 854 | continue; |
682c7051 | 855 | } |
cd29a5c8 NB |
856 | if (maxdisc == NULL || (maxdisc && freesize > maxsize)) { |
857 | maxdisc = dname; | |
52826846 | 858 | maxsize = freesize; |
682c7051 | 859 | } |
cd29a5c8 NB |
860 | if (mindisc ==NULL || (mindisc && freesize < minsize)) { |
861 | mindisc = dname; | |
52826846 | 862 | minsize = freesize; |
682c7051 | 863 | } |
dfd7822c | 864 | skip_size_check: |
171dccc8 | 865 | if (c->runstop != 1 || c->verbose >= 0) { |
37ea3936 | 866 | int fd = open(dname, O_RDONLY); |
98dbf73c | 867 | if (fd < 0) { |
e7b84f9d | 868 | pr_err("Cannot open %s: %s\n", |
b6e63da4 | 869 | dname, strerror(errno)); |
98dbf73c | 870 | fail = 1; |
b6e63da4 NB |
871 | continue; |
872 | } | |
dab6685f NB |
873 | warn |= check_ext2(fd, dname); |
874 | warn |= check_reiser(fd, dname); | |
875 | warn |= check_raid(fd, dname); | |
034b203a TM |
876 | if (strcmp(st->ss->name, "1.x") == 0 && |
877 | st->minor_version >= 1) | |
878 | /* metadata at front */ | |
53ed6ac3 | 879 | warn |= check_partitions(fd, dname, 0, 0); |
6f2af6a4 | 880 | else if (s->level == 1 || is_container(s->level) || |
cf622ec1 | 881 | (s->level == 0 && s->raiddisks == 1)) |
034b203a | 882 | /* partitions could be meaningful */ |
99cc42f4 | 883 | warn |= check_partitions(fd, dname, freesize*2, s->size*2); |
034b203a TM |
884 | else |
885 | /* partitions cannot be meaningful */ | |
53ed6ac3 | 886 | warn |= check_partitions(fd, dname, 0, 0); |
034b203a | 887 | if (strcmp(st->ss->name, "1.x") == 0 && |
a0962fe9 N |
888 | st->minor_version >= 1 && |
889 | did_default && | |
99cc42f4 | 890 | s->level == 1 && |
034b203a TM |
891 | (warn & 1024) == 0) { |
892 | warn |= 1024; | |
e7b84f9d | 893 | pr_err("Note: this array has metadata at the start and\n" |
a0962fe9 | 894 | " may not be suitable as a boot device. If you plan to\n" |
cc86f89c | 895 | " store '/boot' on this device please ensure that\n" |
a0962fe9 | 896 | " your boot-loader understands md/v1.x metadata, or use\n" |
cc86f89c | 897 | " --metadata=0.90\n"); |
a0962fe9 | 898 | } |
b6e63da4 | 899 | close(fd); |
dab6685f | 900 | } |
682c7051 | 901 | } |
f5a39b66 | 902 | |
b91ad097 | 903 | if (missing_disks == dnum && !have_container) { |
1db03765 XN |
904 | pr_err("Subdevs can't be all missing\n"); |
905 | return 1; | |
906 | } | |
99cc42f4 | 907 | if (s->raiddisks + s->sparedisks > st->max_devs) { |
7a862a02 | 908 | pr_err("Too many devices: %s metadata only supports %d\n", |
acab7bb1 N |
909 | st->ss->name, st->max_devs); |
910 | return 1; | |
911 | } | |
8592f29d | 912 | if (have_container) |
99cc42f4 | 913 | info.array.working_disks = s->raiddisks; |
682c7051 | 914 | if (fail) { |
e7b84f9d | 915 | pr_err("create aborted\n"); |
52826846 | 916 | return 1; |
682c7051 | 917 | } |
99cc42f4 | 918 | if (s->size == 0) { |
5f8097be | 919 | if (mindisc == NULL && !have_container) { |
e7b84f9d | 920 | pr_err("no size and no drives given - aborting create.\n"); |
52826846 NB |
921 | return 1; |
922 | } | |
cf622ec1 | 923 | if (s->level > 0 || s->level == LEVEL_MULTIPATH || |
98dbf73c | 924 | s->level == LEVEL_FAULTY || st->ss->external) { |
b5e64645 | 925 | /* size is meaningful */ |
99cc42f4 N |
926 | if (!st->ss->validate_geometry(st, s->level, s->layout, |
927 | s->raiddisks, | |
928 | &s->chunk, minsize*2, | |
ae5dfc56 | 929 | s->data_offset, |
5308f117 AP |
930 | NULL, NULL, |
931 | s->consistency_policy, 0)) { | |
99cc42f4 | 932 | pr_err("devices too large for RAID level %d\n", s->level); |
b5e64645 NB |
933 | return 1; |
934 | } | |
99cc42f4 N |
935 | s->size = minsize; |
936 | if (s->level == 1) | |
ae6c05ad N |
937 | /* If this is ever reshaped to RAID5, we will |
938 | * need a chunksize. So round it off a bit | |
939 | * now just to be safe | |
940 | */ | |
99cc42f4 | 941 | s->size &= ~(64ULL-1); |
171dccc8 | 942 | if (c->verbose > 0) |
99cc42f4 | 943 | pr_err("size set to %lluK\n", s->size); |
b5e64645 | 944 | } |
682c7051 | 945 | } |
748952f7 N |
946 | |
947 | if (!s->bitmap_file && | |
848d71c9 | 948 | !st->ss->external && |
748952f7 | 949 | s->level >= 1 && |
39917e56 | 950 | st->ss->add_internal_bitmap && |
2ce09172 | 951 | s->journaldisks == 0 && |
e97a7cd0 AP |
952 | (s->consistency_policy != CONSISTENCY_POLICY_RESYNC && |
953 | s->consistency_policy != CONSISTENCY_POLICY_PPL) && | |
748952f7 N |
954 | (s->write_behind || s->size > 100*1024*1024ULL)) { |
955 | if (c->verbose > 0) | |
956 | pr_err("automatically enabling write-intent bitmap on large array\n"); | |
957 | s->bitmap_file = "internal"; | |
958 | } | |
b823c8f9 | 959 | if (s->bitmap_file && str_is_none(s->bitmap_file) == true) |
748952f7 N |
960 | s->bitmap_file = NULL; |
961 | ||
5308f117 AP |
962 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL && |
963 | !st->ss->write_init_ppl) { | |
964 | pr_err("%s metadata does not support PPL\n", st->ss->name); | |
965 | return 1; | |
966 | } | |
967 | ||
99cc42f4 | 968 | if (!have_container && s->level > 0 && ((maxsize-s->size)*100 > maxsize)) { |
171dccc8 | 969 | if (c->runstop != 1 || c->verbose >= 0) |
e7b84f9d | 970 | pr_err("largest drive (%s) exceeds size (%lluK) by more than 1%%\n", |
99cc42f4 | 971 | maxdisc, s->size); |
52826846 | 972 | warn = 1; |
682c7051 NB |
973 | } |
974 | ||
9eafa1de | 975 | if (st->ss->detail_platform && st->ss->detail_platform(0, 1, NULL) != 0) { |
171dccc8 | 976 | if (c->runstop != 1 || c->verbose >= 0) |
e7b84f9d | 977 | pr_err("%s unable to enumerate platform support\n" |
5615172f DW |
978 | " array may not be compatible with hardware/firmware\n", |
979 | st->ss->name); | |
980 | warn = 1; | |
981 | } | |
529e2aa5 | 982 | st->nodes = c->nodes; |
7716570e | 983 | st->cluster_name = c->homecluster; |
5615172f | 984 | |
682c7051 | 985 | if (warn) { |
171dccc8 | 986 | if (c->runstop!= 1) { |
52826846 | 987 | if (!ask("Continue creating array? ")) { |
e7b84f9d | 988 | pr_err("create aborted.\n"); |
52826846 NB |
989 | return 1; |
990 | } | |
991 | } else { | |
171dccc8 | 992 | if (c->verbose > 0) |
e7b84f9d | 993 | pr_err("creation continuing despite oddities due to --run\n"); |
682c7051 | 994 | } |
682c7051 NB |
995 | } |
996 | ||
66f8bbbe | 997 | /* If this is raid4/5, we want to configure the last active slot |
52826846 | 998 | * as missing, so that a reconstruct happens (faster than re-parity) |
98c6faba | 999 | * FIX: Can we do this for raid6 as well? |
52826846 | 1000 | */ |
98dbf73c JS |
1001 | if (st->ss->external == 0 && s->assume_clean == 0 && |
1002 | c->force == 0 && first_missing >= s->raiddisks) { | |
1003 | switch (s->level) { | |
66f8bbbe | 1004 | case 4: |
98c6faba | 1005 | case 5: |
99cc42f4 N |
1006 | insert_point = s->raiddisks-1; |
1007 | s->sparedisks++; | |
06c7f68e | 1008 | info.array.active_disks--; |
98c6faba NB |
1009 | missing_disks++; |
1010 | break; | |
1011 | default: | |
1012 | break; | |
1013 | } | |
52826846 | 1014 | } |
6fb79233 NB |
1015 | /* For raid6, if creating with 1 missing drive, make a good drive |
1016 | * into a spare, else the create will fail | |
1017 | */ | |
99cc42f4 | 1018 | if (s->assume_clean == 0 && c->force == 0 && first_missing < s->raiddisks && |
ffcfc735 | 1019 | st->ss->external == 0 && |
99cc42f4 N |
1020 | second_missing >= s->raiddisks && s->level == 6) { |
1021 | insert_point = s->raiddisks - 1; | |
6fb79233 NB |
1022 | if (insert_point == first_missing) |
1023 | insert_point--; | |
99cc42f4 | 1024 | s->sparedisks ++; |
6fb79233 NB |
1025 | info.array.active_disks--; |
1026 | missing_disks++; | |
1027 | } | |
570510ba | 1028 | |
99cc42f4 | 1029 | if (s->level <= 0 && first_missing < subdevs * 2) { |
e7b84f9d | 1030 | pr_err("This level does not support missing devices\n"); |
570510ba NB |
1031 | return 1; |
1032 | } | |
aba69144 | 1033 | |
7f91af49 | 1034 | /* We need to create the device */ |
ad5bc697 | 1035 | map_lock(&map); |
330c07f8 | 1036 | mdfd = create_mddev(ident->devname, ident->name, c->autof, LOCAL, chosen_name, 1); |
e06af9dd JS |
1037 | if (mdfd < 0) { |
1038 | map_unlock(&map); | |
7f91af49 | 1039 | return 1; |
e06af9dd | 1040 | } |
3e9df86a AK |
1041 | /* verify if chosen_name is not in use, |
1042 | * it could be in conflict with already existing device | |
1043 | * e.g. container, array | |
1044 | */ | |
b9ce7ab0 MT |
1045 | if (strncmp(chosen_name, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0 && |
1046 | map_by_name(&map, chosen_name + DEV_MD_DIR_LEN)) { | |
1047 | pr_err("Array name %s is in use already.\n", chosen_name); | |
3e9df86a AK |
1048 | close(mdfd); |
1049 | map_unlock(&map); | |
cd6cbb08 | 1050 | udev_unblock(); |
3e9df86a AK |
1051 | return 1; |
1052 | } | |
7f91af49 | 1053 | |
5f4cc239 JS |
1054 | memset(&inf, 0, sizeof(inf)); |
1055 | md_get_array_info(mdfd, &inf); | |
1056 | if (inf.working_disks != 0) { | |
1057 | pr_err("another array by this name is already running.\n"); | |
e06af9dd | 1058 | goto abort_locked; |
7f91af49 | 1059 | } |
a04d5763 | 1060 | |
682c7051 NB |
1061 | /* Ok, lets try some ioctls */ |
1062 | ||
99cc42f4 N |
1063 | info.array.level = s->level; |
1064 | info.array.size = s->size; | |
1065 | info.array.raid_disks = s->raiddisks; | |
82b27616 NB |
1066 | /* The kernel should *know* what md_minor we are dealing |
1067 | * with, but it chooses to trust me instead. Sigh | |
1068 | */ | |
06c7f68e | 1069 | info.array.md_minor = 0; |
330c07f8 | 1070 | if (fstat_is_blkdev(mdfd, chosen_name, &rdev)) |
0a6bff09 | 1071 | info.array.md_minor = minor(rdev); |
06c7f68e | 1072 | info.array.not_persistent = 0; |
6fb79233 | 1073 | |
cf622ec1 JS |
1074 | if (((s->level == 4 || s->level == 5) && |
1075 | (insert_point < s->raiddisks || first_missing < s->raiddisks)) || | |
1076 | (s->level == 6 && (insert_point < s->raiddisks || | |
1077 | second_missing < s->raiddisks)) || | |
1078 | (s->level <= 0) || s->assume_clean) { | |
06c7f68e | 1079 | info.array.state = 1; /* clean, but one+ drive will be missing*/ |
b7528a20 | 1080 | info.resync_start = MaxSector; |
103f2410 | 1081 | } else { |
06c7f68e | 1082 | info.array.state = 0; /* not clean, but no errors */ |
103f2410 NB |
1083 | info.resync_start = 0; |
1084 | } | |
99cc42f4 | 1085 | if (s->level == 10) { |
f9c25f1d NB |
1086 | /* for raid10, the bitmap size is the capacity of the array, |
1087 | * which is array.size * raid_disks / ncopies; | |
1088 | * .. but convert to sectors. | |
1089 | */ | |
99cc42f4 N |
1090 | int ncopies = ((s->layout>>8) & 255) * (s->layout & 255); |
1091 | bitmapsize = s->size * s->raiddisks / ncopies * 2; | |
1092 | /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, s->size, s->raiddisks, ncopies);*/ | |
f9c25f1d | 1093 | } else |
99cc42f4 | 1094 | bitmapsize = s->size * 2; |
f9c25f1d | 1095 | |
82b27616 NB |
1096 | /* There is lots of redundancy in these disk counts, |
1097 | * raid_disks is the most meaningful value | |
1098 | * it describes the geometry of the array | |
1099 | * it is constant | |
1100 | * nr_disks is total number of used slots. | |
1101 | * it should be raid_disks+spare_disks | |
1102 | * spare_disks is the number of extra disks present | |
1103 | * see above | |
1104 | * active_disks is the number of working disks in | |
1105 | * active slots. (With raid_disks) | |
1106 | * working_disks is the total number of working disks, | |
1107 | * including spares | |
1108 | * failed_disks is the number of disks marked failed | |
1109 | * | |
5d500228 | 1110 | * Ideally, the kernel would keep these (except raid_disks) |
82b27616 NB |
1111 | * up-to-date as we ADD_NEW_DISK, but it doesn't (yet). |
1112 | * So for now, we assume that all raid and spare | |
1113 | * devices will be given. | |
1114 | */ | |
99cc42f4 | 1115 | info.array.spare_disks=s->sparedisks; |
06c7f68e NB |
1116 | info.array.failed_disks=missing_disks; |
1117 | info.array.nr_disks = info.array.working_disks | |
1118 | + info.array.failed_disks; | |
99cc42f4 N |
1119 | info.array.layout = s->layout; |
1120 | info.array.chunk_size = s->chunk*1024; | |
82d9eba6 | 1121 | |
330c07f8 MT |
1122 | if (*name == 0) { |
1123 | /* base name on devname */ | |
d1e80164 NB |
1124 | /* /dev/md0 -> 0 |
1125 | * /dev/md_d0 -> d0 | |
eca944fa | 1126 | * /dev/md_foo -> foo |
d1e80164 NB |
1127 | * /dev/md/1 -> 1 |
1128 | * /dev/md/d1 -> d1 | |
1129 | * /dev/md/home -> home | |
1130 | * /dev/mdhome -> home | |
1131 | */ | |
69207ff6 | 1132 | /* FIXME compare this with rules in create_mddev */ |
330c07f8 MT |
1133 | name = strrchr(chosen_name, '/'); |
1134 | ||
b3b33eb5 NB |
1135 | if (name) { |
1136 | name++; | |
98dbf73c | 1137 | if (strncmp(name, "md_", 3) == 0 && |
330c07f8 | 1138 | strlen(name) > 3 && (name - chosen_name) == 5 /* /dev/ */) |
d1e80164 | 1139 | name += 3; |
98dbf73c JS |
1140 | else if (strncmp(name, "md", 2) == 0 && |
1141 | strlen(name) > 2 && isdigit(name[2]) && | |
330c07f8 | 1142 | (name - chosen_name) == 5 /* /dev/ */) |
b3b33eb5 NB |
1143 | name += 2; |
1144 | } | |
1145 | } | |
5308f117 | 1146 | if (!st->ss->init_super(st, &info.array, s, name, c->homehost, uuid, |
ae5dfc56 | 1147 | s->data_offset)) |
e06af9dd | 1148 | goto abort_locked; |
682c7051 | 1149 | |
d2ca6449 | 1150 | total_slots = info.array.nr_disks; |
a5d85af7 | 1151 | st->ss->getinfo_super(st, &info, NULL); |
dae13137 JS |
1152 | if (sysfs_init(&info, mdfd, NULL)) { |
1153 | pr_err("unable to initialize sysfs\n"); | |
1154 | goto abort_locked; | |
1155 | } | |
159c3a1a | 1156 | |
f5a39b66 | 1157 | if (did_default) { |
3c558363 | 1158 | if (is_subarray(info.text_version)) { |
14a86579 | 1159 | char devnm[MD_NAME_MAX]; |
f7f1b6a1 | 1160 | struct mdinfo *mdi; |
f7f1b6a1 | 1161 | |
14a86579 | 1162 | sysfs_get_container_devnm(&info, devnm); |
4dd2df09 | 1163 | |
f5a39b66 | 1164 | mdi = sysfs_read(-1, devnm, GET_VERSION | GET_DEVS); |
14a86579 MT |
1165 | if (!mdi) { |
1166 | pr_err("Cannot open sysfs for container %s\n", devnm); | |
1167 | goto abort_locked; | |
1168 | } | |
1169 | ||
f5a39b66 MT |
1170 | if (sysfs_test_and_add_drive_policies(st, &custom_pols, mdi, 1)) |
1171 | goto abort_locked; | |
1172 | ||
1173 | if (c->verbose >= 0) | |
1174 | pr_info("Creating array inside %s container /dev/%s\n", | |
1175 | mdi->text_version, devnm); | |
f7f1b6a1 | 1176 | |
f7f1b6a1 | 1177 | sysfs_free(mdi); |
f5a39b66 | 1178 | } else if (c->verbose >= 0) { |
14a86579 | 1179 | pr_info("Defaulting to version %s metadata\n", info.text_version); |
f5a39b66 | 1180 | } |
f7f1b6a1 | 1181 | } |
b8ac1967 | 1182 | |
4dd2df09 | 1183 | map_update(&map, fd2devnm(mdfd), info.text_version, |
a04d5763 | 1184 | info.uuid, chosen_name); |
19ad4b2c AP |
1185 | /* Keep map locked until devices have been added to array |
1186 | * to stop another mdadm from finding and using those devices. | |
1187 | */ | |
a04d5763 | 1188 | |
98dbf73c JS |
1189 | if (s->bitmap_file && (strcmp(s->bitmap_file, "internal") == 0 || |
1190 | strcmp(s->bitmap_file, "clustered") == 0)) { | |
ebeb3663 | 1191 | if (!st->ss->add_internal_bitmap) { |
e7b84f9d | 1192 | pr_err("internal bitmaps not supported with %s metadata\n", |
ebeb3663 | 1193 | st->ss->name); |
19ad4b2c | 1194 | goto abort_locked; |
ebeb3663 | 1195 | } |
2ec2b7e9 JS |
1196 | if (st->ss->add_internal_bitmap(st, &s->bitmap_chunk, |
1197 | c->delay, s->write_behind, | |
1198 | bitmapsize, 1, major_num)) { | |
e7b84f9d | 1199 | pr_err("Given bitmap chunk size not supported.\n"); |
19ad4b2c | 1200 | goto abort_locked; |
55935d51 | 1201 | } |
99cc42f4 | 1202 | s->bitmap_file = NULL; |
55935d51 NB |
1203 | } |
1204 | ||
dae13137 JS |
1205 | if (sysfs_init(&info, mdfd, NULL)) { |
1206 | pr_err("unable to initialize sysfs\n"); | |
1207 | goto abort_locked; | |
1208 | } | |
55935d51 | 1209 | |
4dd2df09 | 1210 | if (st->ss->external && st->container_devnm[0]) { |
f35f2525 N |
1211 | /* member */ |
1212 | ||
1213 | /* When creating a member, we need to be careful | |
1214 | * to negotiate with mdmon properly. | |
1215 | * If it is already running, we cannot write to | |
1216 | * the devices and must ask it to do that part. | |
1217 | * If it isn't running, we write to the devices, | |
1218 | * and then start it. | |
1219 | * We hold an exclusive open on the container | |
1220 | * device to make sure mdmon doesn't exit after | |
1221 | * we checked that it is running. | |
1222 | * | |
1223 | * For now, fail if it is already running. | |
1224 | */ | |
4dd2df09 | 1225 | container_fd = open_dev_excl(st->container_devnm); |
f35f2525 | 1226 | if (container_fd < 0) { |
7a862a02 | 1227 | pr_err("Cannot get exclusive open on container - weird.\n"); |
19ad4b2c | 1228 | goto abort_locked; |
d03373f1 | 1229 | } |
4dd2df09 | 1230 | if (mdmon_running(st->container_devnm)) { |
171dccc8 | 1231 | if (c->verbose) |
7a862a02 | 1232 | pr_err("reusing mdmon for %s.\n", |
4dd2df09 | 1233 | st->container_devnm); |
f35f2525 N |
1234 | st->update_tail = &st->updates; |
1235 | } else | |
1236 | need_mdmon = 1; | |
1237 | } | |
1238 | rv = set_array_info(mdfd, st, &info); | |
82d9eba6 | 1239 | if (rv) { |
330c07f8 | 1240 | pr_err("failed to set array info for %s: %s\n", chosen_name, strerror(errno)); |
19ad4b2c | 1241 | goto abort_locked; |
682c7051 | 1242 | } |
52826846 | 1243 | |
99cc42f4 | 1244 | if (s->bitmap_file) { |
c82f047c | 1245 | int uuid[4]; |
55935d51 | 1246 | |
3da92f27 | 1247 | st->ss->uuid_from_super(st, uuid); |
99cc42f4 N |
1248 | if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, s->bitmap_chunk, |
1249 | c->delay, s->write_behind, | |
f9c25f1d | 1250 | bitmapsize, |
943eafef | 1251 | major_num)) { |
19ad4b2c | 1252 | goto abort_locked; |
c82f047c | 1253 | } |
99cc42f4 | 1254 | bitmap_fd = open(s->bitmap_file, O_RDWR); |
c82f047c | 1255 | if (bitmap_fd < 0) { |
ebf3be99 | 1256 | pr_err("weird: %s cannot be opened\n", |
99cc42f4 | 1257 | s->bitmap_file); |
19ad4b2c | 1258 | goto abort_locked; |
c82f047c NB |
1259 | } |
1260 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
330c07f8 | 1261 | pr_err("Cannot set bitmap file for %s: %s\n", chosen_name, strerror(errno)); |
19ad4b2c | 1262 | goto abort_locked; |
c82f047c NB |
1263 | } |
1264 | } | |
1265 | ||
8a4ce2c0 LG |
1266 | if (add_disks(mdfd, &info, s, c, st, &map, devlist, total_slots, |
1267 | have_container, insert_point, major_num, chosen_name)) | |
1268 | goto abort_locked; | |
9b1fb677 | 1269 | |
19ad4b2c | 1270 | map_unlock(&map); |
5e52ae9e | 1271 | |
6f2af6a4 | 1272 | if (is_container(s->level)) { |
97590376 N |
1273 | /* No need to start. But we should signal udev to |
1274 | * create links */ | |
1275 | sysfs_uevent(&info, "change"); | |
171dccc8 | 1276 | if (c->verbose >= 0) |
330c07f8 | 1277 | pr_err("container %s prepared.\n", chosen_name); |
a7c6e3fb | 1278 | wait_for(chosen_name, mdfd); |
99cc42f4 | 1279 | } else if (c->runstop == 1 || subdevs >= s->raiddisks) { |
598f0d58 | 1280 | if (st->ss->external) { |
4c821454 | 1281 | int err; |
99cc42f4 | 1282 | switch(s->level) { |
598f0d58 NB |
1283 | case LEVEL_LINEAR: |
1284 | case LEVEL_MULTIPATH: | |
1285 | case 0: | |
4c821454 | 1286 | err = sysfs_set_str(&info, NULL, "array_state", |
171dccc8 | 1287 | c->readonly |
72d566f6 N |
1288 | ? "readonly" |
1289 | : "active"); | |
a931db9e | 1290 | need_mdmon = 0; |
598f0d58 NB |
1291 | break; |
1292 | default: | |
4c821454 N |
1293 | err = sysfs_set_str(&info, NULL, "array_state", |
1294 | "readonly"); | |
598f0d58 NB |
1295 | break; |
1296 | } | |
fb2c0f61 | 1297 | sysfs_set_safemode(&info, info.safe_mode_delay); |
4c821454 | 1298 | if (err) { |
7a862a02 | 1299 | pr_err("failed to activate array.\n"); |
4c821454 N |
1300 | ioctl(mdfd, STOP_ARRAY, NULL); |
1301 | goto abort; | |
1302 | } | |
171dccc8 | 1303 | } else if (c->readonly && |
72d566f6 N |
1304 | sysfs_attribute_available( |
1305 | &info, NULL, "array_state")) { | |
1306 | if (sysfs_set_str(&info, NULL, | |
1307 | "array_state", "readonly") < 0) { | |
1308 | pr_err("Failed to start array: %s\n", | |
1309 | strerror(errno)); | |
1310 | ioctl(mdfd, STOP_ARRAY, NULL); | |
1311 | goto abort; | |
1312 | } | |
598f0d58 | 1313 | } else { |
97590376 | 1314 | /* param is not actually used */ |
598f0d58 NB |
1315 | mdu_param_t param; |
1316 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { | |
e7b84f9d | 1317 | pr_err("RUN_ARRAY failed: %s\n", |
72d566f6 | 1318 | strerror(errno)); |
329dfc28 N |
1319 | if (errno == 524 /* ENOTSUP */ && |
1320 | info.array.level == 0) | |
1321 | cont_err("Please use --layout=original or --layout=alternate\n"); | |
a252c078 | 1322 | if (info.array.chunk_size & (info.array.chunk_size-1)) { |
7a862a02 | 1323 | cont_err("Problem may be that chunk size is not a power of 2\n"); |
a252c078 | 1324 | } |
4eb26970 | 1325 | ioctl(mdfd, STOP_ARRAY, NULL); |
7f91af49 | 1326 | goto abort; |
598f0d58 | 1327 | } |
a21e848a N |
1328 | /* if start_ro module parameter is set, array is |
1329 | * auto-read-only, which is bad as the resync won't | |
1330 | * start. So lets make it read-write now. | |
1331 | */ | |
1332 | ioctl(mdfd, RESTART_ARRAY_RW, NULL); | |
682c7051 | 1333 | } |
171dccc8 | 1334 | if (c->verbose >= 0) |
330c07f8 | 1335 | pr_info("array %s started.\n", chosen_name); |
4dd2df09 | 1336 | if (st->ss->external && st->container_devnm[0]) { |
8850ee3e | 1337 | if (need_mdmon) |
4dd2df09 | 1338 | start_mdmon(st->container_devnm); |
8850ee3e | 1339 | |
4dd2df09 | 1340 | ping_monitor(st->container_devnm); |
a931db9e NB |
1341 | close(container_fd); |
1342 | } | |
a7c6e3fb | 1343 | wait_for(chosen_name, mdfd); |
682c7051 | 1344 | } else { |
e7b84f9d | 1345 | pr_err("not starting array - not enough devices.\n"); |
682c7051 | 1346 | } |
cd6cbb08 | 1347 | udev_unblock(); |
ce559078 MT |
1348 | close(mdfd); |
1349 | sysfs_uevent(&info, "change"); | |
f5a39b66 MT |
1350 | dev_policy_free(custom_pols); |
1351 | ||
682c7051 | 1352 | return 0; |
7f91af49 N |
1353 | |
1354 | abort: | |
cd6cbb08 | 1355 | udev_unblock(); |
4eb26970 | 1356 | map_lock(&map); |
e06af9dd | 1357 | abort_locked: |
4dd2df09 | 1358 | map_remove(&map, fd2devnm(mdfd)); |
4eb26970 DW |
1359 | map_unlock(&map); |
1360 | ||
7f91af49 N |
1361 | if (mdfd >= 0) |
1362 | close(mdfd); | |
f5a39b66 MT |
1363 | |
1364 | dev_policy_free(custom_pols); | |
7f91af49 | 1365 | return 1; |
64c4757e | 1366 | } |