]>
Commit | Line | Data |
---|---|---|
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" |
682c7051 NB |
26 | #include "md_u.h" |
27 | #include "md_p.h" | |
60248f74 | 28 | #include <ctype.h> |
577fd104 LG |
29 | #include <fcntl.h> |
30 | #include <signal.h> | |
31 | #include <sys/signalfd.h> | |
32 | #include <sys/wait.h> | |
64c4757e | 33 | |
22dc741f MT |
34 | static int round_size_and_verify(unsigned long long *size, int chunk) |
35 | { | |
36 | if (*size == 0) | |
37 | return 0; | |
38 | *size &= ~(unsigned long long)(chunk - 1); | |
39 | if (*size == 0) { | |
40 | pr_err("Size cannot be smaller than chunk.\n"); | |
41 | return 1; | |
42 | } | |
43 | return 0; | |
44 | } | |
45 | ||
913f07d1 MT |
46 | /** |
47 | * default_layout() - Get default layout for level. | |
48 | * @st: metadata requested, could be NULL. | |
49 | * @level: raid level requested. | |
50 | * @verbose: verbose level. | |
51 | * | |
52 | * Try to ask metadata handler first, otherwise use global defaults. | |
53 | * | |
54 | * Return: Layout or &UnSet, return value meaning depends of level used. | |
55 | */ | |
56 | int default_layout(struct supertype *st, int level, int verbose) | |
a18a888e DW |
57 | { |
58 | int layout = UnSet; | |
913f07d1 MT |
59 | mapping_t *layout_map = NULL; |
60 | char *layout_name = NULL; | |
a18a888e | 61 | |
30f58b22 DW |
62 | if (st && st->ss->default_geometry) |
63 | st->ss->default_geometry(st, &level, &layout, NULL); | |
a18a888e | 64 | |
913f07d1 MT |
65 | if (layout != UnSet) |
66 | return layout; | |
a18a888e | 67 | |
913f07d1 MT |
68 | switch (level) { |
69 | default: /* no layout */ | |
70 | layout = 0; | |
71 | break; | |
72 | case 0: | |
73 | layout = RAID0_ORIG_LAYOUT; | |
74 | break; | |
75 | case 10: | |
76 | layout = 0x102; /* near=2, far=1 */ | |
77 | layout_name = "n2"; | |
78 | break; | |
79 | case 5: | |
80 | case 6: | |
81 | layout_map = r5layout; | |
82 | break; | |
83 | case LEVEL_FAULTY: | |
84 | layout_map = faultylayout; | |
85 | break; | |
86 | } | |
87 | ||
88 | if (layout_map) { | |
89 | layout = map_name(layout_map, "default"); | |
5f21d674 | 90 | layout_name = map_num_s(layout_map, layout); |
913f07d1 MT |
91 | } |
92 | if (layout_name && verbose > 0) | |
93 | pr_err("layout defaults to %s\n", layout_name); | |
a18a888e DW |
94 | |
95 | return layout; | |
96 | } | |
97 | ||
577fd104 LG |
98 | static pid_t write_zeroes_fork(int fd, struct shape *s, struct supertype *st, |
99 | struct mddev_dev *dv) | |
100 | ||
101 | { | |
102 | const unsigned long long req_size = 1 << 30; | |
103 | unsigned long long offset_bytes, size_bytes, sz; | |
104 | sigset_t sigset; | |
105 | int ret = 0; | |
106 | pid_t pid; | |
107 | ||
108 | size_bytes = KIB_TO_BYTES(s->size); | |
109 | ||
110 | /* | |
111 | * If size_bytes is zero, this is a zoned raid array where | |
112 | * each disk is of a different size and uses its full | |
113 | * disk. Thus zero the entire disk. | |
114 | */ | |
115 | if (!size_bytes && !get_dev_size(fd, dv->devname, &size_bytes)) | |
116 | return -1; | |
117 | ||
118 | if (dv->data_offset != INVALID_SECTORS) | |
119 | offset_bytes = SEC_TO_BYTES(dv->data_offset); | |
120 | else | |
121 | offset_bytes = SEC_TO_BYTES(st->data_offset); | |
122 | ||
123 | pr_info("zeroing data from %lld to %lld on: %s\n", | |
124 | offset_bytes, size_bytes, dv->devname); | |
125 | ||
126 | pid = fork(); | |
127 | if (pid < 0) { | |
128 | pr_err("Could not fork to zero disks: %s\n", strerror(errno)); | |
129 | return pid; | |
130 | } else if (pid != 0) { | |
131 | return pid; | |
132 | } | |
133 | ||
134 | sigemptyset(&sigset); | |
135 | sigaddset(&sigset, SIGINT); | |
136 | sigprocmask(SIG_UNBLOCK, &sigset, NULL); | |
137 | ||
138 | while (size_bytes) { | |
139 | /* | |
140 | * Split requests to the kernel into 1GB chunks seeing the | |
141 | * fallocate() call is not interruptible and blocking a | |
142 | * ctrl-c for several minutes is not desirable. | |
143 | * | |
144 | * 1GB is chosen as a compromise: the user may still have | |
145 | * to wait several seconds if they ctrl-c on devices that | |
146 | * zero slowly, but will reduce the number of requests | |
147 | * required and thus the overhead on devices that perform | |
148 | * better. | |
149 | */ | |
150 | sz = size_bytes; | |
151 | if (sz >= req_size) | |
152 | sz = req_size; | |
153 | ||
154 | if (fallocate(fd, FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE, | |
155 | offset_bytes, sz)) { | |
156 | pr_err("zeroing %s failed: %s\n", dv->devname, | |
157 | strerror(errno)); | |
158 | ret = 1; | |
159 | break; | |
160 | } | |
161 | ||
162 | offset_bytes += sz; | |
163 | size_bytes -= sz; | |
164 | } | |
165 | ||
166 | exit(ret); | |
167 | } | |
168 | ||
169 | static int wait_for_zero_forks(int *zero_pids, int count) | |
170 | { | |
171 | int wstatus, ret = 0, i, sfd, wait_count = 0; | |
172 | struct signalfd_siginfo fdsi; | |
173 | bool interrupted = false; | |
174 | sigset_t sigset; | |
175 | ssize_t s; | |
176 | ||
177 | for (i = 0; i < count; i++) | |
178 | if (zero_pids[i]) | |
179 | wait_count++; | |
180 | if (!wait_count) | |
181 | return 0; | |
182 | ||
183 | sigemptyset(&sigset); | |
184 | sigaddset(&sigset, SIGINT); | |
185 | sigaddset(&sigset, SIGCHLD); | |
186 | sigprocmask(SIG_BLOCK, &sigset, NULL); | |
187 | ||
188 | sfd = signalfd(-1, &sigset, 0); | |
189 | if (sfd < 0) { | |
190 | pr_err("Unable to create signalfd: %s\n", strerror(errno)); | |
191 | return 1; | |
192 | } | |
193 | ||
194 | while (1) { | |
195 | s = read(sfd, &fdsi, sizeof(fdsi)); | |
196 | if (s != sizeof(fdsi)) { | |
197 | pr_err("Invalid signalfd read: %s\n", strerror(errno)); | |
198 | close(sfd); | |
199 | return 1; | |
200 | } | |
201 | ||
202 | if (fdsi.ssi_signo == SIGINT) { | |
203 | printf("\n"); | |
204 | pr_info("Interrupting zeroing processes, please wait...\n"); | |
205 | interrupted = true; | |
206 | } else if (fdsi.ssi_signo == SIGCHLD) { | |
207 | if (!--wait_count) | |
208 | break; | |
209 | } | |
210 | } | |
211 | ||
212 | close(sfd); | |
213 | ||
214 | for (i = 0; i < count; i++) { | |
215 | if (!zero_pids[i]) | |
216 | continue; | |
217 | ||
218 | waitpid(zero_pids[i], &wstatus, 0); | |
219 | zero_pids[i] = 0; | |
220 | if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus)) | |
221 | ret = 1; | |
222 | } | |
223 | ||
224 | if (interrupted) { | |
225 | pr_err("zeroing interrupted!\n"); | |
226 | return 1; | |
227 | } | |
228 | ||
229 | if (ret) | |
230 | pr_err("zeroing failed!\n"); | |
231 | else | |
232 | pr_info("zeroing finished\n"); | |
233 | ||
234 | return ret; | |
235 | } | |
236 | ||
8a4ce2c0 LG |
237 | static int add_disk_to_super(int mdfd, struct shape *s, struct context *c, |
238 | struct supertype *st, struct mddev_dev *dv, | |
577fd104 LG |
239 | struct mdinfo *info, int have_container, int major_num, |
240 | int *zero_pid) | |
8a4ce2c0 LG |
241 | { |
242 | dev_t rdev; | |
243 | int fd; | |
244 | ||
245 | if (dv->disposition == 'j') { | |
246 | info->disk.raid_disk = MD_DISK_ROLE_JOURNAL; | |
247 | info->disk.state = (1<<MD_DISK_JOURNAL); | |
248 | } else if (info->disk.raid_disk < s->raiddisks) { | |
249 | info->disk.state = (1<<MD_DISK_ACTIVE) | | |
250 | (1<<MD_DISK_SYNC); | |
251 | } else { | |
252 | info->disk.state = 0; | |
253 | } | |
254 | ||
255 | if (dv->writemostly == FlagSet) { | |
256 | if (major_num == BITMAP_MAJOR_CLUSTERED) { | |
257 | pr_err("Can not set %s --write-mostly with a clustered bitmap\n",dv->devname); | |
258 | return 1; | |
259 | } else { | |
260 | info->disk.state |= (1<<MD_DISK_WRITEMOSTLY); | |
261 | } | |
262 | ||
263 | } | |
264 | ||
265 | if (dv->failfast == FlagSet) | |
266 | info->disk.state |= (1<<MD_DISK_FAILFAST); | |
267 | ||
268 | if (have_container) { | |
269 | fd = -1; | |
270 | } else { | |
271 | if (st->ss->external && st->container_devnm[0]) | |
272 | fd = open(dv->devname, O_RDWR); | |
273 | else | |
274 | fd = open(dv->devname, O_RDWR|O_EXCL); | |
275 | ||
276 | if (fd < 0) { | |
277 | pr_err("failed to open %s after earlier success - aborting\n", | |
278 | dv->devname); | |
279 | return 1; | |
280 | } | |
281 | if (!fstat_is_blkdev(fd, dv->devname, &rdev)) | |
282 | return 1; | |
283 | info->disk.major = major(rdev); | |
284 | info->disk.minor = minor(rdev); | |
285 | } | |
286 | if (fd >= 0) | |
287 | remove_partitions(fd); | |
288 | if (st->ss->add_to_super(st, &info->disk, fd, dv->devname, | |
289 | dv->data_offset)) { | |
290 | ioctl(mdfd, STOP_ARRAY, NULL); | |
291 | return 1; | |
292 | } | |
293 | st->ss->getinfo_super(st, info, NULL); | |
294 | ||
577fd104 LG |
295 | if (fd >= 0 && s->write_zeroes) { |
296 | *zero_pid = write_zeroes_fork(fd, s, st, dv); | |
297 | if (*zero_pid <= 0) { | |
298 | ioctl(mdfd, STOP_ARRAY, NULL); | |
299 | return 1; | |
300 | } | |
301 | } | |
302 | ||
8a4ce2c0 LG |
303 | if (have_container && c->verbose > 0) |
304 | pr_err("Using %s for device %d\n", | |
305 | map_dev(info->disk.major, info->disk.minor, 0), | |
306 | info->disk.number); | |
307 | ||
308 | if (!have_container) { | |
309 | /* getinfo_super might have lost these ... */ | |
310 | info->disk.major = major(rdev); | |
311 | info->disk.minor = minor(rdev); | |
312 | } | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | static int update_metadata(int mdfd, struct shape *s, struct supertype *st, | |
318 | struct map_ent **map, struct mdinfo *info, | |
319 | char *chosen_name) | |
320 | { | |
321 | struct mdinfo info_new; | |
322 | struct map_ent *me = NULL; | |
323 | ||
324 | /* check to see if the uuid has changed due to these | |
325 | * metadata changes, and if so update the member array | |
326 | * and container uuid. Note ->write_init_super clears | |
327 | * the subarray cursor such that ->getinfo_super once | |
328 | * again returns container info. | |
329 | */ | |
330 | st->ss->getinfo_super(st, &info_new, NULL); | |
ef6236da | 331 | if (st->ss->external && !is_container(s->level) && |
8a4ce2c0 LG |
332 | !same_uuid(info_new.uuid, info->uuid, 0)) { |
333 | map_update(map, fd2devnm(mdfd), | |
334 | info_new.text_version, | |
335 | info_new.uuid, chosen_name); | |
336 | me = map_by_devnm(map, st->container_devnm); | |
337 | } | |
338 | ||
339 | if (st->ss->write_init_super(st)) { | |
340 | st->ss->free_super(st); | |
341 | return 1; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Before activating the array, perform extra steps | |
346 | * required to configure the internal write-intent | |
347 | * bitmap. | |
348 | */ | |
349 | if (info_new.consistency_policy == CONSISTENCY_POLICY_BITMAP && | |
350 | st->ss->set_bitmap && st->ss->set_bitmap(st, info)) { | |
351 | st->ss->free_super(st); | |
352 | return 1; | |
353 | } | |
354 | ||
355 | /* update parent container uuid */ | |
356 | if (me) { | |
357 | char *path = xstrdup(me->path); | |
358 | ||
359 | st->ss->getinfo_super(st, &info_new, NULL); | |
360 | map_update(map, st->container_devnm, info_new.text_version, | |
361 | info_new.uuid, path); | |
362 | free(path); | |
363 | } | |
364 | ||
365 | flush_metadata_updates(st); | |
366 | st->ss->free_super(st); | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | static int add_disks(int mdfd, struct mdinfo *info, struct shape *s, | |
372 | struct context *c, struct supertype *st, | |
373 | struct map_ent **map, struct mddev_dev *devlist, | |
374 | int total_slots, int have_container, int insert_point, | |
375 | int major_num, char *chosen_name) | |
376 | { | |
377 | struct mddev_dev *moved_disk = NULL; | |
378 | int pass, raid_disk_num, dnum; | |
577fd104 | 379 | int zero_pids[total_slots]; |
8a4ce2c0 LG |
380 | struct mddev_dev *dv; |
381 | struct mdinfo *infos; | |
577fd104 | 382 | sigset_t sigset, orig_sigset; |
8a4ce2c0 LG |
383 | int ret = 0; |
384 | ||
577fd104 LG |
385 | /* |
386 | * Block SIGINT so the main thread will always wait for the | |
387 | * zeroing processes when being interrupted. Otherwise the | |
388 | * zeroing processes will finish their work in the background | |
389 | * keeping the disk busy. | |
390 | */ | |
391 | sigemptyset(&sigset); | |
392 | sigaddset(&sigset, SIGINT); | |
393 | sigprocmask(SIG_BLOCK, &sigset, &orig_sigset); | |
394 | memset(zero_pids, 0, sizeof(zero_pids)); | |
395 | ||
8a4ce2c0 LG |
396 | infos = xmalloc(sizeof(*infos) * total_slots); |
397 | enable_fds(total_slots); | |
398 | for (pass = 1; pass <= 2; pass++) { | |
399 | for (dnum = 0, raid_disk_num = 0, dv = devlist; dv; | |
400 | dv = (dv->next) ? (dv->next) : moved_disk, dnum++) { | |
401 | if (dnum >= total_slots) | |
402 | abort(); | |
403 | if (dnum == insert_point) { | |
404 | raid_disk_num += 1; | |
405 | moved_disk = dv; | |
406 | continue; | |
407 | } | |
408 | if (strcasecmp(dv->devname, "missing") == 0) { | |
409 | raid_disk_num += 1; | |
410 | continue; | |
411 | } | |
412 | if (have_container) | |
413 | moved_disk = NULL; | |
414 | if (have_container && dnum < total_slots - 1) | |
415 | /* repeatedly use the container */ | |
416 | moved_disk = dv; | |
417 | ||
418 | switch(pass) { | |
419 | case 1: | |
420 | infos[dnum] = *info; | |
421 | infos[dnum].disk.number = dnum; | |
422 | infos[dnum].disk.raid_disk = raid_disk_num++; | |
423 | ||
424 | if (dv->disposition == 'j') | |
425 | raid_disk_num--; | |
426 | ||
427 | ret = add_disk_to_super(mdfd, s, c, st, dv, | |
428 | &infos[dnum], have_container, | |
577fd104 | 429 | major_num, &zero_pids[dnum]); |
8a4ce2c0 LG |
430 | if (ret) |
431 | goto out; | |
432 | ||
433 | break; | |
434 | case 2: | |
435 | infos[dnum].errors = 0; | |
436 | ||
437 | ret = add_disk(mdfd, st, info, &infos[dnum]); | |
438 | if (ret) { | |
439 | pr_err("ADD_NEW_DISK for %s failed: %s\n", | |
440 | dv->devname, strerror(errno)); | |
441 | if (errno == EINVAL && | |
442 | info->array.level == 0) { | |
443 | pr_err("Possibly your kernel doesn't support RAID0 layouts.\n"); | |
444 | pr_err("Either upgrade, or use --layout=dangerous\n"); | |
445 | } | |
446 | goto out; | |
447 | } | |
448 | break; | |
449 | } | |
450 | if (!have_container && | |
451 | dv == moved_disk && dnum != insert_point) break; | |
452 | } | |
453 | ||
454 | if (pass == 1) { | |
577fd104 LG |
455 | ret = wait_for_zero_forks(zero_pids, total_slots); |
456 | if (ret) | |
457 | goto out; | |
458 | ||
8a4ce2c0 LG |
459 | ret = update_metadata(mdfd, s, st, map, info, |
460 | chosen_name); | |
461 | if (ret) | |
462 | goto out; | |
463 | } | |
464 | } | |
465 | ||
466 | out: | |
577fd104 LG |
467 | if (ret) |
468 | wait_for_zero_forks(zero_pids, total_slots); | |
8a4ce2c0 | 469 | free(infos); |
577fd104 | 470 | sigprocmask(SIG_SETMASK, &orig_sigset, NULL); |
8a4ce2c0 LG |
471 | return ret; |
472 | } | |
473 | ||
7f91af49 | 474 | int Create(struct supertype *st, char *mddev, |
171dccc8 | 475 | char *name, int *uuid, |
a655e550 | 476 | int subdevs, struct mddev_dev *devlist, |
99cc42f4 | 477 | struct shape *s, |
ae5dfc56 | 478 | struct context *c) |
64c4757e | 479 | { |
682c7051 NB |
480 | /* |
481 | * Create a new raid array. | |
482 | * | |
483 | * First check that necessary details are available | |
484 | * (i.e. level, raid-disks) | |
485 | * | |
486 | * Then check each disk to see what might be on it | |
487 | * and report anything interesting. | |
488 | * | |
489 | * If anything looks odd, and runstop not set, | |
490 | * abort. | |
491 | * | |
492 | * SET_ARRAY_INFO and ADD_NEW_DISK, and | |
82d9eba6 | 493 | * if runstop==run, or raiddisks disks were used, |
682c7051 NB |
494 | * RUN_ARRAY |
495 | */ | |
7f91af49 | 496 | int mdfd; |
98dbf73c | 497 | unsigned long long minsize = 0, maxsize = 0; |
cd29a5c8 NB |
498 | char *mindisc = NULL; |
499 | char *maxdisc = NULL; | |
8a4ce2c0 | 500 | int dnum; |
a655e550 | 501 | struct mddev_dev *dv; |
0a6bff09 | 502 | dev_t rdev; |
98dbf73c | 503 | int fail = 0, warn = 0; |
82d9eba6 | 504 | int first_missing = subdevs * 2; |
6fb79233 | 505 | int second_missing = subdevs * 2; |
52826846 | 506 | int missing_disks = 0; |
82d9eba6 | 507 | int insert_point = subdevs * 2; /* where to insert a missing drive */ |
d2ca6449 | 508 | int total_slots; |
82d9eba6 | 509 | int rv; |
c82f047c | 510 | int bitmap_fd; |
5f8097be | 511 | int have_container = 0; |
0e600426 | 512 | int container_fd = -1; |
a931db9e | 513 | int need_mdmon = 0; |
f9c25f1d | 514 | unsigned long long bitmapsize; |
8a4ce2c0 | 515 | struct mdinfo info; |
b8ac1967 | 516 | int did_default = 0; |
a18a888e | 517 | int do_default_layout = 0; |
c21e737b | 518 | int do_default_chunk = 0; |
a04d5763 | 519 | char chosen_name[1024]; |
ad5bc697 | 520 | struct map_ent *map = NULL; |
8592f29d | 521 | unsigned long long newsize; |
5f4cc239 | 522 | mdu_array_info_t inf; |
682c7051 | 523 | |
943eafef | 524 | int major_num = BITMAP_MAJOR_HI; |
82d9485e | 525 | if (s->bitmap_file && strcmp(s->bitmap_file, "clustered") == 0) { |
6d9c7c25 | 526 | major_num = BITMAP_MAJOR_CLUSTERED; |
82d9485e GJ |
527 | if (c->nodes <= 1) { |
528 | pr_err("At least 2 nodes are needed for cluster-md\n"); | |
529 | return 1; | |
530 | } | |
531 | } | |
dcec9ee5 | 532 | |
06c7f68e | 533 | memset(&info, 0, sizeof(info)); |
99cc42f4 N |
534 | if (s->level == UnSet && st && st->ss->default_geometry) |
535 | st->ss->default_geometry(st, &s->level, NULL, NULL); | |
536 | if (s->level == UnSet) { | |
e7b84f9d | 537 | pr_err("a RAID level is needed to create an array.\n"); |
682c7051 NB |
538 | return 1; |
539 | } | |
99cc42f4 | 540 | if (s->raiddisks < 4 && s->level == 6) { |
e7b84f9d | 541 | pr_err("at least 4 raid-devices needed for level 6\n"); |
98c6faba NB |
542 | return 1; |
543 | } | |
99cc42f4 | 544 | if (s->raiddisks > 256 && s->level == 6) { |
e7b84f9d | 545 | pr_err("no more than 256 raid-devices supported for level 6\n"); |
98c6faba NB |
546 | return 1; |
547 | } | |
99cc42f4 | 548 | if (s->raiddisks < 2 && s->level >= 4) { |
f7889e51 | 549 | pr_err("at least 2 raid-devices needed for level %d\n", s->level); |
52826846 NB |
550 | return 1; |
551 | } | |
99cc42f4 | 552 | if (s->level <= 0 && s->sparedisks) { |
e7b84f9d | 553 | pr_err("This level does not support spare devices\n"); |
570510ba NB |
554 | return 1; |
555 | } | |
5f8097be NB |
556 | |
557 | if (subdevs == 1 && strcmp(devlist->devname, "missing") != 0) { | |
558 | /* If given a single device, it might be a container, and we can | |
559 | * extract a device list from there | |
560 | */ | |
5f8097be NB |
561 | int fd; |
562 | ||
563 | memset(&inf, 0, sizeof(inf)); | |
37ea3936 | 564 | fd = open(devlist->devname, O_RDONLY); |
5f8097be | 565 | if (fd >= 0 && |
9cd39f01 | 566 | md_get_array_info(fd, &inf) == 0 && inf.raid_disks == 0) { |
5f8097be NB |
567 | /* yep, looks like a container */ |
568 | if (st) { | |
0fb69d1d N |
569 | rv = st->ss->load_container(st, fd, |
570 | devlist->devname); | |
5f8097be NB |
571 | if (rv == 0) |
572 | have_container = 1; | |
573 | } else { | |
0fb69d1d | 574 | st = super_by_fd(fd, NULL); |
5f8097be | 575 | if (st && !(rv = st->ss-> |
0fb69d1d N |
576 | load_container(st, fd, |
577 | devlist->devname))) | |
5f8097be NB |
578 | have_container = 1; |
579 | else | |
580 | st = NULL; | |
581 | } | |
18fde300 | 582 | if (have_container) { |
99cc42f4 | 583 | subdevs = s->raiddisks; |
18fde300 DW |
584 | first_missing = subdevs * 2; |
585 | second_missing = subdevs * 2; | |
586 | insert_point = subdevs * 2; | |
587 | } | |
5f8097be NB |
588 | } |
589 | if (fd >= 0) | |
590 | close(fd); | |
5f8097be | 591 | } |
99cc42f4 | 592 | if (st && st->ss->external && s->sparedisks) { |
7a862a02 | 593 | pr_err("This metadata type does not support spare disks at create time\n"); |
ffcfc735 N |
594 | return 1; |
595 | } | |
cc1799c3 | 596 | if (subdevs > s->raiddisks+s->sparedisks+s->journaldisks) { |
99cc42f4 | 597 | pr_err("You have listed more devices (%d) than are in the array(%d)!\n", subdevs, s->raiddisks+s->sparedisks); |
52826846 | 598 | return 1; |
682c7051 | 599 | } |
cc1799c3 | 600 | if (!have_container && subdevs < s->raiddisks+s->sparedisks+s->journaldisks) { |
e7b84f9d | 601 | pr_err("You haven't given enough devices (real or missing) to create this array\n"); |
52826846 NB |
602 | return 1; |
603 | } | |
99cc42f4 | 604 | if (s->bitmap_file && s->level <= 0) { |
e7b84f9d | 605 | pr_err("bitmaps not meaningful with level %s\n", |
99cc42f4 | 606 | map_num(pers, s->level)?:"given"); |
5b28bd56 NB |
607 | return 1; |
608 | } | |
52826846 | 609 | |
682c7051 | 610 | /* now set some defaults */ |
b5e64645 | 611 | |
99cc42f4 | 612 | if (s->layout == UnSet) { |
a18a888e | 613 | do_default_layout = 1; |
99cc42f4 | 614 | s->layout = default_layout(st, s->level, c->verbose); |
a18a888e | 615 | } |
682c7051 | 616 | |
99cc42f4 | 617 | if (s->level == 10) |
e5329c37 | 618 | /* check layout fits in array*/ |
99cc42f4 | 619 | if ((s->layout&255) * ((s->layout>>8)&255) > s->raiddisks) { |
e7b84f9d | 620 | pr_err("that layout requires at least %d devices\n", |
99cc42f4 | 621 | (s->layout&255) * ((s->layout>>8)&255)); |
e5329c37 NB |
622 | return 1; |
623 | } | |
624 | ||
99cc42f4 | 625 | switch(s->level) { |
aa88f531 NB |
626 | case 4: |
627 | case 5: | |
e5329c37 | 628 | case 10: |
98c6faba | 629 | case 6: |
aa88f531 | 630 | case 0: |
99cc42f4 N |
631 | if (s->chunk == 0 || s->chunk == UnSet) { |
632 | s->chunk = UnSet; | |
c21e737b CA |
633 | do_default_chunk = 1; |
634 | /* chunk will be set later */ | |
bb7295f1 | 635 | } |
5f175898 N |
636 | break; |
637 | case LEVEL_LINEAR: | |
638 | /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */ | |
aa88f531 | 639 | break; |
570510ba | 640 | case 1: |
08e43379 | 641 | case LEVEL_FAULTY: |
570510ba | 642 | case LEVEL_MULTIPATH: |
17f25ca6 | 643 | case LEVEL_CONTAINER: |
99cc42f4 | 644 | if (s->chunk) { |
5b30a34a MG |
645 | pr_err("specifying chunk size is forbidden for this level\n"); |
646 | return 1; | |
aa88f531 NB |
647 | } |
648 | break; | |
570510ba | 649 | default: |
99cc42f4 | 650 | pr_err("unknown level %d\n", s->level); |
570510ba | 651 | return 1; |
682c7051 | 652 | } |
22dc741f | 653 | |
99cc42f4 | 654 | if (s->size == MAX_SIZE) |
d04f65f4 | 655 | /* use '0' to mean 'max' now... */ |
99cc42f4 N |
656 | s->size = 0; |
657 | if (s->size && s->chunk && s->chunk != UnSet) | |
22dc741f MT |
658 | if (round_size_and_verify(&s->size, s->chunk)) |
659 | return 1; | |
660 | ||
99cc42f4 N |
661 | newsize = s->size * 2; |
662 | if (st && ! st->ss->validate_geometry(st, s->level, s->layout, s->raiddisks, | |
af4348dd | 663 | &s->chunk, s->size*2, |
ae5dfc56 | 664 | s->data_offset, NULL, |
5308f117 | 665 | &newsize, s->consistency_policy, |
98dbf73c | 666 | c->verbose >= 0)) |
17f25ca6 | 667 | return 1; |
bb7295f1 | 668 | |
99cc42f4 N |
669 | if (s->chunk && s->chunk != UnSet) { |
670 | newsize &= ~(unsigned long long)(s->chunk*2 - 1); | |
64385908 CA |
671 | if (do_default_chunk) { |
672 | /* default chunk was just set */ | |
171dccc8 | 673 | if (c->verbose > 0) |
7a862a02 | 674 | pr_err("chunk size defaults to %dK\n", s->chunk); |
22dc741f MT |
675 | if (round_size_and_verify(&s->size, s->chunk)) |
676 | return 1; | |
64385908 CA |
677 | do_default_chunk = 0; |
678 | } | |
bb7295f1 | 679 | } |
64385908 | 680 | |
99cc42f4 N |
681 | if (s->size == 0) { |
682 | s->size = newsize / 2; | |
683 | if (s->level == 1) | |
ae6c05ad N |
684 | /* If this is ever reshaped to RAID5, we will |
685 | * need a chunksize. So round it off a bit | |
686 | * now just to be safe | |
687 | */ | |
99cc42f4 | 688 | s->size &= ~(64ULL-1); |
ae6c05ad | 689 | |
99cc42f4 N |
690 | if (s->size && c->verbose > 0) |
691 | pr_err("setting size to %lluK\n", s->size); | |
8592f29d | 692 | } |
17f25ca6 | 693 | |
682c7051 | 694 | /* now look at the subdevs */ |
06c7f68e NB |
695 | info.array.active_disks = 0; |
696 | info.array.working_disks = 0; | |
c913b90e | 697 | dnum = 0; |
98dbf73c | 698 | for (dv = devlist; dv; dv = dv->next) |
ae5dfc56 | 699 | if (s->data_offset == VARIABLE_OFFSET) |
476066a3 N |
700 | dv->data_offset = INVALID_SECTORS; |
701 | else | |
ae5dfc56 | 702 | dv->data_offset = s->data_offset; |
476066a3 | 703 | |
8592f29d | 704 | for (dv=devlist; dv && !have_container; dv=dv->next, dnum++) { |
cd29a5c8 | 705 | char *dname = dv->devname; |
17f25ca6 | 706 | unsigned long long freesize; |
e9b11fee | 707 | int dfd; |
72ca9bcf | 708 | char *doff; |
e9b11fee | 709 | |
98dbf73c | 710 | if (strcasecmp(dname, "missing") == 0) { |
c913b90e NB |
711 | if (first_missing > dnum) |
712 | first_missing = dnum; | |
6fb79233 NB |
713 | if (second_missing > dnum && dnum > first_missing) |
714 | second_missing = dnum; | |
52826846 NB |
715 | missing_disks ++; |
716 | continue; | |
717 | } | |
ae5dfc56 | 718 | if (s->data_offset == VARIABLE_OFFSET) { |
72ca9bcf N |
719 | doff = strchr(dname, ':'); |
720 | if (doff) { | |
721 | *doff++ = 0; | |
722 | dv->data_offset = parse_size(doff); | |
723 | } else | |
724 | dv->data_offset = INVALID_SECTORS; | |
725 | } else | |
ae5dfc56 | 726 | dv->data_offset = s->data_offset; |
72ca9bcf | 727 | |
58b3c697 | 728 | dfd = open(dname, O_RDONLY); |
e9b11fee | 729 | if (dfd < 0) { |
e7b84f9d | 730 | pr_err("cannot open %s: %s\n", |
e9b11fee N |
731 | dname, strerror(errno)); |
732 | exit(2); | |
733 | } | |
0a6bff09 | 734 | if (!fstat_is_blkdev(dfd, dname, NULL)) { |
e9b11fee | 735 | close(dfd); |
e9b11fee N |
736 | exit(2); |
737 | } | |
738 | close(dfd); | |
06c7f68e | 739 | info.array.working_disks++; |
dfd7822c | 740 | if (dnum < s->raiddisks && dv->disposition != 'j') |
06c7f68e | 741 | info.array.active_disks++; |
058574b1 | 742 | if (st == NULL) { |
8aec876d | 743 | struct createinfo *ci = conf_get_create_info(); |
058574b1 NB |
744 | if (ci) |
745 | st = ci->supertype; | |
746 | } | |
576d6d83 NB |
747 | if (st == NULL) { |
748 | /* Need to choose a default metadata, which is different | |
17f25ca6 | 749 | * depending on geometry of array. |
576d6d83 NB |
750 | */ |
751 | int i; | |
752 | char *name = "default"; | |
98dbf73c | 753 | for(i = 0; !st && superlist[i]; i++) { |
576d6d83 | 754 | st = superlist[i]->match_metadata_desc(name); |
ecbd9e81 N |
755 | if (!st) |
756 | continue; | |
a18a888e | 757 | if (do_default_layout) |
99cc42f4 | 758 | s->layout = default_layout(st, s->level, c->verbose); |
ecbd9e81 | 759 | switch (st->ss->validate_geometry( |
99cc42f4 | 760 | st, s->level, s->layout, s->raiddisks, |
af4348dd | 761 | &s->chunk, s->size*2, |
72ca9bcf | 762 | dv->data_offset, dname, |
5308f117 AP |
763 | &freesize, s->consistency_policy, |
764 | c->verbose > 0)) { | |
ecbd9e81 N |
765 | case -1: /* Not valid, message printed, and not |
766 | * worth checking any further */ | |
767 | exit(2); | |
768 | break; | |
769 | case 0: /* Geometry not valid */ | |
55425f27 | 770 | free(st); |
17f25ca6 | 771 | st = NULL; |
99cc42f4 | 772 | s->chunk = do_default_chunk ? UnSet : s->chunk; |
ecbd9e81 N |
773 | break; |
774 | case 1: /* All happy */ | |
775 | break; | |
55425f27 | 776 | } |
17f25ca6 | 777 | } |
576d6d83 NB |
778 | |
779 | if (!st) { | |
58b3c697 N |
780 | int dfd = open(dname, O_RDONLY|O_EXCL); |
781 | if (dfd < 0) { | |
e7b84f9d | 782 | pr_err("cannot open %s: %s\n", |
58b3c697 N |
783 | dname, strerror(errno)); |
784 | exit(2); | |
785 | } | |
7a862a02 | 786 | pr_err("device %s not suitable for any style of array\n", |
17f25ca6 | 787 | dname); |
576d6d83 NB |
788 | exit(2); |
789 | } | |
b8ac1967 | 790 | if (st->ss != &super0 || |
576d6d83 | 791 | st->minor_version != 90) |
b8ac1967 | 792 | did_default = 1; |
17f25ca6 | 793 | } else { |
a18a888e | 794 | if (do_default_layout) |
99cc42f4 N |
795 | s->layout = default_layout(st, s->level, 0); |
796 | if (!st->ss->validate_geometry(st, s->level, s->layout, | |
797 | s->raiddisks, | |
af4348dd | 798 | &s->chunk, s->size*2, |
72ca9bcf | 799 | dv->data_offset, |
af4348dd | 800 | dname, &freesize, |
5308f117 | 801 | s->consistency_policy, |
171dccc8 | 802 | c->verbose >= 0)) { |
17f25ca6 | 803 | |
7a862a02 | 804 | pr_err("%s is not suitable for this array.\n", |
e7b84f9d | 805 | dname); |
17f25ca6 NB |
806 | fail = 1; |
807 | continue; | |
808 | } | |
682c7051 | 809 | } |
82d9eba6 | 810 | |
cc1799c3 | 811 | if (dv->disposition == 'j') |
dfd7822c | 812 | goto skip_size_check; /* skip write journal for size check */ |
cc1799c3 | 813 | |
82d9eba6 | 814 | freesize /= 2; /* convert to K */ |
99cc42f4 | 815 | if (s->chunk && s->chunk != UnSet) { |
d2cd3ffc | 816 | /* round to chunk size */ |
99cc42f4 | 817 | freesize = freesize & ~(s->chunk-1); |
64385908 CA |
818 | if (do_default_chunk) { |
819 | /* default chunk was just set */ | |
171dccc8 | 820 | if (c->verbose > 0) |
7a862a02 | 821 | pr_err("chunk size defaults to %dK\n", s->chunk); |
22dc741f MT |
822 | if (round_size_and_verify(&s->size, s->chunk)) |
823 | return 1; | |
64385908 CA |
824 | do_default_chunk = 0; |
825 | } | |
d2cd3ffc | 826 | } |
066e92f0 LD |
827 | if (!freesize) { |
828 | pr_err("no free space left on %s\n", dname); | |
829 | fail = 1; | |
830 | continue; | |
831 | } | |
682c7051 | 832 | |
99cc42f4 | 833 | if (s->size && freesize < s->size) { |
7a862a02 | 834 | pr_err("%s is smaller than given size. %lluK < %lluK + metadata\n", |
99cc42f4 | 835 | dname, freesize, s->size); |
52826846 | 836 | fail = 1; |
52826846 | 837 | continue; |
682c7051 | 838 | } |
cd29a5c8 NB |
839 | if (maxdisc == NULL || (maxdisc && freesize > maxsize)) { |
840 | maxdisc = dname; | |
52826846 | 841 | maxsize = freesize; |
682c7051 | 842 | } |
cd29a5c8 NB |
843 | if (mindisc ==NULL || (mindisc && freesize < minsize)) { |
844 | mindisc = dname; | |
52826846 | 845 | minsize = freesize; |
682c7051 | 846 | } |
dfd7822c | 847 | skip_size_check: |
171dccc8 | 848 | if (c->runstop != 1 || c->verbose >= 0) { |
37ea3936 | 849 | int fd = open(dname, O_RDONLY); |
98dbf73c | 850 | if (fd < 0) { |
e7b84f9d | 851 | pr_err("Cannot open %s: %s\n", |
b6e63da4 | 852 | dname, strerror(errno)); |
98dbf73c | 853 | fail = 1; |
b6e63da4 NB |
854 | continue; |
855 | } | |
dab6685f NB |
856 | warn |= check_ext2(fd, dname); |
857 | warn |= check_reiser(fd, dname); | |
858 | warn |= check_raid(fd, dname); | |
034b203a TM |
859 | if (strcmp(st->ss->name, "1.x") == 0 && |
860 | st->minor_version >= 1) | |
861 | /* metadata at front */ | |
53ed6ac3 | 862 | warn |= check_partitions(fd, dname, 0, 0); |
6f2af6a4 | 863 | else if (s->level == 1 || is_container(s->level) || |
cf622ec1 | 864 | (s->level == 0 && s->raiddisks == 1)) |
034b203a | 865 | /* partitions could be meaningful */ |
99cc42f4 | 866 | warn |= check_partitions(fd, dname, freesize*2, s->size*2); |
034b203a TM |
867 | else |
868 | /* partitions cannot be meaningful */ | |
53ed6ac3 | 869 | warn |= check_partitions(fd, dname, 0, 0); |
034b203a | 870 | if (strcmp(st->ss->name, "1.x") == 0 && |
a0962fe9 N |
871 | st->minor_version >= 1 && |
872 | did_default && | |
99cc42f4 | 873 | s->level == 1 && |
034b203a TM |
874 | (warn & 1024) == 0) { |
875 | warn |= 1024; | |
e7b84f9d | 876 | pr_err("Note: this array has metadata at the start and\n" |
a0962fe9 | 877 | " may not be suitable as a boot device. If you plan to\n" |
cc86f89c | 878 | " store '/boot' on this device please ensure that\n" |
a0962fe9 | 879 | " your boot-loader understands md/v1.x metadata, or use\n" |
cc86f89c | 880 | " --metadata=0.90\n"); |
a0962fe9 | 881 | } |
b6e63da4 | 882 | close(fd); |
dab6685f | 883 | } |
682c7051 | 884 | } |
b91ad097 | 885 | if (missing_disks == dnum && !have_container) { |
1db03765 XN |
886 | pr_err("Subdevs can't be all missing\n"); |
887 | return 1; | |
888 | } | |
99cc42f4 | 889 | if (s->raiddisks + s->sparedisks > st->max_devs) { |
7a862a02 | 890 | pr_err("Too many devices: %s metadata only supports %d\n", |
acab7bb1 N |
891 | st->ss->name, st->max_devs); |
892 | return 1; | |
893 | } | |
8592f29d | 894 | if (have_container) |
99cc42f4 | 895 | info.array.working_disks = s->raiddisks; |
682c7051 | 896 | if (fail) { |
e7b84f9d | 897 | pr_err("create aborted\n"); |
52826846 | 898 | return 1; |
682c7051 | 899 | } |
99cc42f4 | 900 | if (s->size == 0) { |
5f8097be | 901 | if (mindisc == NULL && !have_container) { |
e7b84f9d | 902 | pr_err("no size and no drives given - aborting create.\n"); |
52826846 NB |
903 | return 1; |
904 | } | |
cf622ec1 | 905 | if (s->level > 0 || s->level == LEVEL_MULTIPATH || |
98dbf73c | 906 | s->level == LEVEL_FAULTY || st->ss->external) { |
b5e64645 | 907 | /* size is meaningful */ |
99cc42f4 N |
908 | if (!st->ss->validate_geometry(st, s->level, s->layout, |
909 | s->raiddisks, | |
910 | &s->chunk, minsize*2, | |
ae5dfc56 | 911 | s->data_offset, |
5308f117 AP |
912 | NULL, NULL, |
913 | s->consistency_policy, 0)) { | |
99cc42f4 | 914 | pr_err("devices too large for RAID level %d\n", s->level); |
b5e64645 NB |
915 | return 1; |
916 | } | |
99cc42f4 N |
917 | s->size = minsize; |
918 | if (s->level == 1) | |
ae6c05ad N |
919 | /* If this is ever reshaped to RAID5, we will |
920 | * need a chunksize. So round it off a bit | |
921 | * now just to be safe | |
922 | */ | |
99cc42f4 | 923 | s->size &= ~(64ULL-1); |
171dccc8 | 924 | if (c->verbose > 0) |
99cc42f4 | 925 | pr_err("size set to %lluK\n", s->size); |
b5e64645 | 926 | } |
682c7051 | 927 | } |
748952f7 N |
928 | |
929 | if (!s->bitmap_file && | |
848d71c9 | 930 | !st->ss->external && |
748952f7 | 931 | s->level >= 1 && |
39917e56 | 932 | st->ss->add_internal_bitmap && |
2ce09172 | 933 | s->journaldisks == 0 && |
e97a7cd0 AP |
934 | (s->consistency_policy != CONSISTENCY_POLICY_RESYNC && |
935 | s->consistency_policy != CONSISTENCY_POLICY_PPL) && | |
748952f7 N |
936 | (s->write_behind || s->size > 100*1024*1024ULL)) { |
937 | if (c->verbose > 0) | |
938 | pr_err("automatically enabling write-intent bitmap on large array\n"); | |
939 | s->bitmap_file = "internal"; | |
940 | } | |
941 | if (s->bitmap_file && strcmp(s->bitmap_file, "none") == 0) | |
942 | s->bitmap_file = NULL; | |
943 | ||
5308f117 AP |
944 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL && |
945 | !st->ss->write_init_ppl) { | |
946 | pr_err("%s metadata does not support PPL\n", st->ss->name); | |
947 | return 1; | |
948 | } | |
949 | ||
99cc42f4 | 950 | if (!have_container && s->level > 0 && ((maxsize-s->size)*100 > maxsize)) { |
171dccc8 | 951 | if (c->runstop != 1 || c->verbose >= 0) |
e7b84f9d | 952 | pr_err("largest drive (%s) exceeds size (%lluK) by more than 1%%\n", |
99cc42f4 | 953 | maxdisc, s->size); |
52826846 | 954 | warn = 1; |
682c7051 NB |
955 | } |
956 | ||
9eafa1de | 957 | if (st->ss->detail_platform && st->ss->detail_platform(0, 1, NULL) != 0) { |
171dccc8 | 958 | if (c->runstop != 1 || c->verbose >= 0) |
e7b84f9d | 959 | pr_err("%s unable to enumerate platform support\n" |
5615172f DW |
960 | " array may not be compatible with hardware/firmware\n", |
961 | st->ss->name); | |
962 | warn = 1; | |
963 | } | |
529e2aa5 | 964 | st->nodes = c->nodes; |
7716570e | 965 | st->cluster_name = c->homecluster; |
5615172f | 966 | |
682c7051 | 967 | if (warn) { |
171dccc8 | 968 | if (c->runstop!= 1) { |
52826846 | 969 | if (!ask("Continue creating array? ")) { |
e7b84f9d | 970 | pr_err("create aborted.\n"); |
52826846 NB |
971 | return 1; |
972 | } | |
973 | } else { | |
171dccc8 | 974 | if (c->verbose > 0) |
e7b84f9d | 975 | pr_err("creation continuing despite oddities due to --run\n"); |
682c7051 | 976 | } |
682c7051 NB |
977 | } |
978 | ||
66f8bbbe | 979 | /* If this is raid4/5, we want to configure the last active slot |
52826846 | 980 | * as missing, so that a reconstruct happens (faster than re-parity) |
98c6faba | 981 | * FIX: Can we do this for raid6 as well? |
52826846 | 982 | */ |
98dbf73c JS |
983 | if (st->ss->external == 0 && s->assume_clean == 0 && |
984 | c->force == 0 && first_missing >= s->raiddisks) { | |
985 | switch (s->level) { | |
66f8bbbe | 986 | case 4: |
98c6faba | 987 | case 5: |
99cc42f4 N |
988 | insert_point = s->raiddisks-1; |
989 | s->sparedisks++; | |
06c7f68e | 990 | info.array.active_disks--; |
98c6faba NB |
991 | missing_disks++; |
992 | break; | |
993 | default: | |
994 | break; | |
995 | } | |
52826846 | 996 | } |
6fb79233 NB |
997 | /* For raid6, if creating with 1 missing drive, make a good drive |
998 | * into a spare, else the create will fail | |
999 | */ | |
99cc42f4 | 1000 | if (s->assume_clean == 0 && c->force == 0 && first_missing < s->raiddisks && |
ffcfc735 | 1001 | st->ss->external == 0 && |
99cc42f4 N |
1002 | second_missing >= s->raiddisks && s->level == 6) { |
1003 | insert_point = s->raiddisks - 1; | |
6fb79233 NB |
1004 | if (insert_point == first_missing) |
1005 | insert_point--; | |
99cc42f4 | 1006 | s->sparedisks ++; |
6fb79233 NB |
1007 | info.array.active_disks--; |
1008 | missing_disks++; | |
1009 | } | |
570510ba | 1010 | |
99cc42f4 | 1011 | if (s->level <= 0 && first_missing < subdevs * 2) { |
e7b84f9d | 1012 | pr_err("This level does not support missing devices\n"); |
570510ba NB |
1013 | return 1; |
1014 | } | |
aba69144 | 1015 | |
7f91af49 | 1016 | /* We need to create the device */ |
ad5bc697 | 1017 | map_lock(&map); |
cd6cbb08 | 1018 | mdfd = create_mddev(mddev, name, c->autof, LOCAL, chosen_name, 1); |
e06af9dd JS |
1019 | if (mdfd < 0) { |
1020 | map_unlock(&map); | |
7f91af49 | 1021 | return 1; |
e06af9dd | 1022 | } |
3e9df86a AK |
1023 | /* verify if chosen_name is not in use, |
1024 | * it could be in conflict with already existing device | |
1025 | * e.g. container, array | |
1026 | */ | |
b9ce7ab0 MT |
1027 | if (strncmp(chosen_name, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0 && |
1028 | map_by_name(&map, chosen_name + DEV_MD_DIR_LEN)) { | |
1029 | pr_err("Array name %s is in use already.\n", chosen_name); | |
3e9df86a AK |
1030 | close(mdfd); |
1031 | map_unlock(&map); | |
cd6cbb08 | 1032 | udev_unblock(); |
3e9df86a AK |
1033 | return 1; |
1034 | } | |
f2be09f1 | 1035 | mddev = chosen_name; |
7f91af49 | 1036 | |
5f4cc239 JS |
1037 | memset(&inf, 0, sizeof(inf)); |
1038 | md_get_array_info(mdfd, &inf); | |
1039 | if (inf.working_disks != 0) { | |
1040 | pr_err("another array by this name is already running.\n"); | |
e06af9dd | 1041 | goto abort_locked; |
7f91af49 | 1042 | } |
a04d5763 | 1043 | |
682c7051 NB |
1044 | /* Ok, lets try some ioctls */ |
1045 | ||
99cc42f4 N |
1046 | info.array.level = s->level; |
1047 | info.array.size = s->size; | |
1048 | info.array.raid_disks = s->raiddisks; | |
82b27616 NB |
1049 | /* The kernel should *know* what md_minor we are dealing |
1050 | * with, but it chooses to trust me instead. Sigh | |
1051 | */ | |
06c7f68e | 1052 | info.array.md_minor = 0; |
0a6bff09 ZL |
1053 | if (fstat_is_blkdev(mdfd, mddev, &rdev)) |
1054 | info.array.md_minor = minor(rdev); | |
06c7f68e | 1055 | info.array.not_persistent = 0; |
6fb79233 | 1056 | |
cf622ec1 JS |
1057 | if (((s->level == 4 || s->level == 5) && |
1058 | (insert_point < s->raiddisks || first_missing < s->raiddisks)) || | |
1059 | (s->level == 6 && (insert_point < s->raiddisks || | |
1060 | second_missing < s->raiddisks)) || | |
1061 | (s->level <= 0) || s->assume_clean) { | |
06c7f68e | 1062 | info.array.state = 1; /* clean, but one+ drive will be missing*/ |
b7528a20 | 1063 | info.resync_start = MaxSector; |
103f2410 | 1064 | } else { |
06c7f68e | 1065 | info.array.state = 0; /* not clean, but no errors */ |
103f2410 NB |
1066 | info.resync_start = 0; |
1067 | } | |
99cc42f4 | 1068 | if (s->level == 10) { |
f9c25f1d NB |
1069 | /* for raid10, the bitmap size is the capacity of the array, |
1070 | * which is array.size * raid_disks / ncopies; | |
1071 | * .. but convert to sectors. | |
1072 | */ | |
99cc42f4 N |
1073 | int ncopies = ((s->layout>>8) & 255) * (s->layout & 255); |
1074 | bitmapsize = s->size * s->raiddisks / ncopies * 2; | |
1075 | /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, s->size, s->raiddisks, ncopies);*/ | |
f9c25f1d | 1076 | } else |
99cc42f4 | 1077 | bitmapsize = s->size * 2; |
f9c25f1d | 1078 | |
82b27616 NB |
1079 | /* There is lots of redundancy in these disk counts, |
1080 | * raid_disks is the most meaningful value | |
1081 | * it describes the geometry of the array | |
1082 | * it is constant | |
1083 | * nr_disks is total number of used slots. | |
1084 | * it should be raid_disks+spare_disks | |
1085 | * spare_disks is the number of extra disks present | |
1086 | * see above | |
1087 | * active_disks is the number of working disks in | |
1088 | * active slots. (With raid_disks) | |
1089 | * working_disks is the total number of working disks, | |
1090 | * including spares | |
1091 | * failed_disks is the number of disks marked failed | |
1092 | * | |
5d500228 | 1093 | * Ideally, the kernel would keep these (except raid_disks) |
82b27616 NB |
1094 | * up-to-date as we ADD_NEW_DISK, but it doesn't (yet). |
1095 | * So for now, we assume that all raid and spare | |
1096 | * devices will be given. | |
1097 | */ | |
99cc42f4 | 1098 | info.array.spare_disks=s->sparedisks; |
06c7f68e NB |
1099 | info.array.failed_disks=missing_disks; |
1100 | info.array.nr_disks = info.array.working_disks | |
1101 | + info.array.failed_disks; | |
99cc42f4 N |
1102 | info.array.layout = s->layout; |
1103 | info.array.chunk_size = s->chunk*1024; | |
82d9eba6 | 1104 | |
b3b33eb5 NB |
1105 | if (name == NULL || *name == 0) { |
1106 | /* base name on mddev */ | |
d1e80164 NB |
1107 | /* /dev/md0 -> 0 |
1108 | * /dev/md_d0 -> d0 | |
eca944fa | 1109 | * /dev/md_foo -> foo |
d1e80164 NB |
1110 | * /dev/md/1 -> 1 |
1111 | * /dev/md/d1 -> d1 | |
1112 | * /dev/md/home -> home | |
1113 | * /dev/mdhome -> home | |
1114 | */ | |
69207ff6 | 1115 | /* FIXME compare this with rules in create_mddev */ |
b3b33eb5 NB |
1116 | name = strrchr(mddev, '/'); |
1117 | if (name) { | |
1118 | name++; | |
98dbf73c JS |
1119 | if (strncmp(name, "md_", 3) == 0 && |
1120 | strlen(name) > 3 && (name-mddev) == 5 /* /dev/ */) | |
d1e80164 | 1121 | name += 3; |
98dbf73c JS |
1122 | else if (strncmp(name, "md", 2) == 0 && |
1123 | strlen(name) > 2 && isdigit(name[2]) && | |
60248f74 | 1124 | (name-mddev) == 5 /* /dev/ */) |
b3b33eb5 NB |
1125 | name += 2; |
1126 | } | |
1127 | } | |
5308f117 | 1128 | if (!st->ss->init_super(st, &info.array, s, name, c->homehost, uuid, |
ae5dfc56 | 1129 | s->data_offset)) |
e06af9dd | 1130 | goto abort_locked; |
682c7051 | 1131 | |
d2ca6449 | 1132 | total_slots = info.array.nr_disks; |
a5d85af7 | 1133 | st->ss->getinfo_super(st, &info, NULL); |
dae13137 JS |
1134 | if (sysfs_init(&info, mdfd, NULL)) { |
1135 | pr_err("unable to initialize sysfs\n"); | |
1136 | goto abort_locked; | |
1137 | } | |
159c3a1a | 1138 | |
171dccc8 | 1139 | if (did_default && c->verbose >= 0) { |
3c558363 | 1140 | if (is_subarray(info.text_version)) { |
4dd2df09 N |
1141 | char devnm[32]; |
1142 | char *ep; | |
f7f1b6a1 | 1143 | struct mdinfo *mdi; |
f7f1b6a1 | 1144 | |
4dd2df09 N |
1145 | strncpy(devnm, info.text_version+1, 32); |
1146 | devnm[31] = 0; | |
1147 | ep = strchr(devnm, '/'); | |
1148 | if (ep) | |
1149 | *ep = 0; | |
1150 | ||
1151 | mdi = sysfs_read(-1, devnm, GET_VERSION); | |
f7f1b6a1 | 1152 | |
9364dbfb | 1153 | pr_info("Creating array inside %s container %s\n", |
4dd2df09 | 1154 | mdi?mdi->text_version:"managed", devnm); |
f7f1b6a1 NB |
1155 | sysfs_free(mdi); |
1156 | } else | |
9364dbfb LG |
1157 | pr_info("Defaulting to version %s metadata\n", |
1158 | info.text_version); | |
f7f1b6a1 | 1159 | } |
b8ac1967 | 1160 | |
4dd2df09 | 1161 | map_update(&map, fd2devnm(mdfd), info.text_version, |
a04d5763 | 1162 | info.uuid, chosen_name); |
19ad4b2c AP |
1163 | /* Keep map locked until devices have been added to array |
1164 | * to stop another mdadm from finding and using those devices. | |
1165 | */ | |
a04d5763 | 1166 | |
98dbf73c JS |
1167 | if (s->bitmap_file && (strcmp(s->bitmap_file, "internal") == 0 || |
1168 | strcmp(s->bitmap_file, "clustered") == 0)) { | |
ebeb3663 | 1169 | if (!st->ss->add_internal_bitmap) { |
e7b84f9d | 1170 | pr_err("internal bitmaps not supported with %s metadata\n", |
ebeb3663 | 1171 | st->ss->name); |
19ad4b2c | 1172 | goto abort_locked; |
ebeb3663 | 1173 | } |
2ec2b7e9 JS |
1174 | if (st->ss->add_internal_bitmap(st, &s->bitmap_chunk, |
1175 | c->delay, s->write_behind, | |
1176 | bitmapsize, 1, major_num)) { | |
e7b84f9d | 1177 | pr_err("Given bitmap chunk size not supported.\n"); |
19ad4b2c | 1178 | goto abort_locked; |
55935d51 | 1179 | } |
99cc42f4 | 1180 | s->bitmap_file = NULL; |
55935d51 NB |
1181 | } |
1182 | ||
dae13137 JS |
1183 | if (sysfs_init(&info, mdfd, NULL)) { |
1184 | pr_err("unable to initialize sysfs\n"); | |
1185 | goto abort_locked; | |
1186 | } | |
55935d51 | 1187 | |
4dd2df09 | 1188 | if (st->ss->external && st->container_devnm[0]) { |
f35f2525 N |
1189 | /* member */ |
1190 | ||
1191 | /* When creating a member, we need to be careful | |
1192 | * to negotiate with mdmon properly. | |
1193 | * If it is already running, we cannot write to | |
1194 | * the devices and must ask it to do that part. | |
1195 | * If it isn't running, we write to the devices, | |
1196 | * and then start it. | |
1197 | * We hold an exclusive open on the container | |
1198 | * device to make sure mdmon doesn't exit after | |
1199 | * we checked that it is running. | |
1200 | * | |
1201 | * For now, fail if it is already running. | |
1202 | */ | |
4dd2df09 | 1203 | container_fd = open_dev_excl(st->container_devnm); |
f35f2525 | 1204 | if (container_fd < 0) { |
7a862a02 | 1205 | pr_err("Cannot get exclusive open on container - weird.\n"); |
19ad4b2c | 1206 | goto abort_locked; |
d03373f1 | 1207 | } |
4dd2df09 | 1208 | if (mdmon_running(st->container_devnm)) { |
171dccc8 | 1209 | if (c->verbose) |
7a862a02 | 1210 | pr_err("reusing mdmon for %s.\n", |
4dd2df09 | 1211 | st->container_devnm); |
f35f2525 N |
1212 | st->update_tail = &st->updates; |
1213 | } else | |
1214 | need_mdmon = 1; | |
1215 | } | |
1216 | rv = set_array_info(mdfd, st, &info); | |
82d9eba6 | 1217 | if (rv) { |
e7b84f9d | 1218 | pr_err("failed to set array info for %s: %s\n", |
52826846 | 1219 | mddev, strerror(errno)); |
19ad4b2c | 1220 | goto abort_locked; |
682c7051 | 1221 | } |
52826846 | 1222 | |
99cc42f4 | 1223 | if (s->bitmap_file) { |
c82f047c | 1224 | int uuid[4]; |
55935d51 | 1225 | |
3da92f27 | 1226 | st->ss->uuid_from_super(st, uuid); |
99cc42f4 N |
1227 | if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, s->bitmap_chunk, |
1228 | c->delay, s->write_behind, | |
f9c25f1d | 1229 | bitmapsize, |
943eafef | 1230 | major_num)) { |
19ad4b2c | 1231 | goto abort_locked; |
c82f047c | 1232 | } |
99cc42f4 | 1233 | bitmap_fd = open(s->bitmap_file, O_RDWR); |
c82f047c | 1234 | if (bitmap_fd < 0) { |
ebf3be99 | 1235 | pr_err("weird: %s cannot be opened\n", |
99cc42f4 | 1236 | s->bitmap_file); |
19ad4b2c | 1237 | goto abort_locked; |
c82f047c NB |
1238 | } |
1239 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
e7b84f9d | 1240 | pr_err("Cannot set bitmap file for %s: %s\n", |
c82f047c | 1241 | mddev, strerror(errno)); |
19ad4b2c | 1242 | goto abort_locked; |
c82f047c NB |
1243 | } |
1244 | } | |
1245 | ||
8a4ce2c0 LG |
1246 | if (add_disks(mdfd, &info, s, c, st, &map, devlist, total_slots, |
1247 | have_container, insert_point, major_num, chosen_name)) | |
1248 | goto abort_locked; | |
9b1fb677 | 1249 | |
19ad4b2c | 1250 | map_unlock(&map); |
5e52ae9e | 1251 | |
6f2af6a4 | 1252 | if (is_container(s->level)) { |
97590376 N |
1253 | /* No need to start. But we should signal udev to |
1254 | * create links */ | |
1255 | sysfs_uevent(&info, "change"); | |
171dccc8 | 1256 | if (c->verbose >= 0) |
e7b84f9d | 1257 | pr_err("container %s prepared.\n", mddev); |
a7c6e3fb | 1258 | wait_for(chosen_name, mdfd); |
99cc42f4 | 1259 | } else if (c->runstop == 1 || subdevs >= s->raiddisks) { |
598f0d58 | 1260 | if (st->ss->external) { |
4c821454 | 1261 | int err; |
99cc42f4 | 1262 | switch(s->level) { |
598f0d58 NB |
1263 | case LEVEL_LINEAR: |
1264 | case LEVEL_MULTIPATH: | |
1265 | case 0: | |
4c821454 | 1266 | err = sysfs_set_str(&info, NULL, "array_state", |
171dccc8 | 1267 | c->readonly |
72d566f6 N |
1268 | ? "readonly" |
1269 | : "active"); | |
a931db9e | 1270 | need_mdmon = 0; |
598f0d58 NB |
1271 | break; |
1272 | default: | |
4c821454 N |
1273 | err = sysfs_set_str(&info, NULL, "array_state", |
1274 | "readonly"); | |
598f0d58 NB |
1275 | break; |
1276 | } | |
fb2c0f61 | 1277 | sysfs_set_safemode(&info, info.safe_mode_delay); |
4c821454 | 1278 | if (err) { |
7a862a02 | 1279 | pr_err("failed to activate array.\n"); |
4c821454 N |
1280 | ioctl(mdfd, STOP_ARRAY, NULL); |
1281 | goto abort; | |
1282 | } | |
171dccc8 | 1283 | } else if (c->readonly && |
72d566f6 N |
1284 | sysfs_attribute_available( |
1285 | &info, NULL, "array_state")) { | |
1286 | if (sysfs_set_str(&info, NULL, | |
1287 | "array_state", "readonly") < 0) { | |
1288 | pr_err("Failed to start array: %s\n", | |
1289 | strerror(errno)); | |
1290 | ioctl(mdfd, STOP_ARRAY, NULL); | |
1291 | goto abort; | |
1292 | } | |
598f0d58 | 1293 | } else { |
97590376 | 1294 | /* param is not actually used */ |
598f0d58 NB |
1295 | mdu_param_t param; |
1296 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { | |
e7b84f9d | 1297 | pr_err("RUN_ARRAY failed: %s\n", |
72d566f6 | 1298 | strerror(errno)); |
329dfc28 N |
1299 | if (errno == 524 /* ENOTSUP */ && |
1300 | info.array.level == 0) | |
1301 | cont_err("Please use --layout=original or --layout=alternate\n"); | |
a252c078 | 1302 | if (info.array.chunk_size & (info.array.chunk_size-1)) { |
7a862a02 | 1303 | cont_err("Problem may be that chunk size is not a power of 2\n"); |
a252c078 | 1304 | } |
4eb26970 | 1305 | ioctl(mdfd, STOP_ARRAY, NULL); |
7f91af49 | 1306 | goto abort; |
598f0d58 | 1307 | } |
a21e848a N |
1308 | /* if start_ro module parameter is set, array is |
1309 | * auto-read-only, which is bad as the resync won't | |
1310 | * start. So lets make it read-write now. | |
1311 | */ | |
1312 | ioctl(mdfd, RESTART_ARRAY_RW, NULL); | |
682c7051 | 1313 | } |
171dccc8 | 1314 | if (c->verbose >= 0) |
9364dbfb | 1315 | pr_info("array %s started.\n", mddev); |
4dd2df09 | 1316 | if (st->ss->external && st->container_devnm[0]) { |
8850ee3e | 1317 | if (need_mdmon) |
4dd2df09 | 1318 | start_mdmon(st->container_devnm); |
8850ee3e | 1319 | |
4dd2df09 | 1320 | ping_monitor(st->container_devnm); |
a931db9e NB |
1321 | close(container_fd); |
1322 | } | |
a7c6e3fb | 1323 | wait_for(chosen_name, mdfd); |
682c7051 | 1324 | } else { |
e7b84f9d | 1325 | pr_err("not starting array - not enough devices.\n"); |
682c7051 | 1326 | } |
cd6cbb08 | 1327 | udev_unblock(); |
ce559078 MT |
1328 | close(mdfd); |
1329 | sysfs_uevent(&info, "change"); | |
682c7051 | 1330 | return 0; |
7f91af49 N |
1331 | |
1332 | abort: | |
cd6cbb08 | 1333 | udev_unblock(); |
4eb26970 | 1334 | map_lock(&map); |
e06af9dd | 1335 | abort_locked: |
4dd2df09 | 1336 | map_remove(&map, fd2devnm(mdfd)); |
4eb26970 DW |
1337 | map_unlock(&map); |
1338 | ||
7f91af49 N |
1339 | if (mdfd >= 0) |
1340 | close(mdfd); | |
1341 | return 1; | |
64c4757e | 1342 | } |