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Manage: fixed some error message in --stop
[thirdparty/mdadm.git] / Manage.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
5 *
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 * Author: Neil Brown
22 * Email: <neilb@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 */
29
30 #include "mdadm.h"
31 #include "md_u.h"
32 #include "md_p.h"
33
34 #define REGISTER_DEV _IO (MD_MAJOR, 1)
35 #define START_MD _IO (MD_MAJOR, 2)
36 #define STOP_MD _IO (MD_MAJOR, 3)
37
38 int Manage_ro(char *devname, int fd, int readonly)
39 {
40 /* switch to readonly or rw
41 *
42 * requires >= 0.90.0
43 * first check that array is runing
44 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
45 *
46 */
47 mdu_array_info_t array;
48
49 if (md_get_version(fd) < 9000) {
50 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
51 return 1;
52 }
53 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
54 fprintf(stderr, Name ": %s does not appear to be active.\n",
55 devname);
56 return 1;
57 }
58
59 if (readonly>0) {
60 if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
61 fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
62 devname, strerror(errno));
63 return 1;
64 }
65 } else if (readonly < 0) {
66 if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
67 fprintf(stderr, Name ": failed to set writable for %s: %s\n",
68 devname, strerror(errno));
69 return 1;
70 }
71 }
72 return 0;
73 }
74
75 #ifndef MDASSEMBLE
76
77 int Manage_runstop(char *devname, int fd, int runstop, int quiet)
78 {
79 /* Run or stop the array. array must already be configured
80 * required >= 0.90.0
81 * Only print failure messages if quiet == 0;
82 * quiet > 0 means really be quiet
83 * quiet < 0 means we will try again if it fails.
84 */
85 mdu_param_t param; /* unused */
86
87 if (runstop == -1 && md_get_version(fd) < 9000) {
88 if (ioctl(fd, STOP_MD, 0)) {
89 if (quiet == 0) fprintf(stderr,
90 Name ": stopping device %s "
91 "failed: %s\n",
92 devname, strerror(errno));
93 return 1;
94 }
95 }
96
97 if (md_get_version(fd) < 9000) {
98 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
99 return 1;
100 }
101 /*
102 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
103 fprintf(stderr, Name ": %s does not appear to be active.\n",
104 devname);
105 return 1;
106 }
107 */
108 if (runstop>0) {
109 if (ioctl(fd, RUN_ARRAY, &param)) {
110 fprintf(stderr, Name ": failed to run array %s: %s\n",
111 devname, strerror(errno));
112 return 1;
113 }
114 if (quiet <= 0)
115 fprintf(stderr, Name ": started %s\n", devname);
116 } else if (runstop < 0){
117 struct map_ent *map = NULL;
118 struct stat stb;
119 struct mdinfo *mdi;
120 /* If this is an mdmon managed array, just write 'inactive'
121 * to the array state and let mdmon clear up.
122 */
123 mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
124 if (mdi &&
125 mdi->array.level > 0 &&
126 mdi->text_version[0] == '/') {
127 char *cp;
128
129 /* This is mdmon managed. */
130 close(fd);
131 if (sysfs_set_str(mdi, NULL,
132 "array_state", "inactive") < 0) {
133 if (quiet == 0)
134 fprintf(stderr, Name
135 ": failed to stop array %s: %s\n",
136 devname, strerror(errno));
137 return 1;
138 }
139
140 /* Give monitor a chance to act */
141 cp = strchr(mdi->text_version+1, '/');
142 if (*cp)
143 *cp = 0;
144 ping_monitor(mdi->text_version+1);
145
146 fd = open(devname, O_RDONLY);
147 }
148 if (mdi)
149 sysfs_free(mdi);
150
151 if (fd >= 0 && ioctl(fd, STOP_ARRAY, NULL)) {
152 if (quiet == 0)
153 fprintf(stderr, Name
154 ": failed to stop array %s: %s\n",
155 devname, strerror(errno));
156 return 1;
157 }
158
159 if (quiet <= 0)
160 fprintf(stderr, Name ": stopped %s\n", devname);
161 if (fd >= 0 && fstat(fd, &stb) == 0) {
162 int devnum;
163 if (major(stb.st_rdev) == MD_MAJOR)
164 devnum = minor(stb.st_rdev);
165 else
166 devnum = -1-(minor(stb.st_rdev)>>6);
167 map_delete(&map, devnum);
168 map_write(map);
169 map_free(map);
170 }
171 }
172 return 0;
173 }
174
175 int Manage_resize(char *devname, int fd, long long size, int raid_disks)
176 {
177 mdu_array_info_t info;
178 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
179 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
180 devname, strerror(errno));
181 return 1;
182 }
183 if (size >= 0)
184 info.size = size;
185 if (raid_disks > 0)
186 info.raid_disks = raid_disks;
187 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
188 fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
189 devname, strerror(errno));
190 return 1;
191 }
192 return 0;
193 }
194
195 int Manage_reconfig(char *devname, int fd, int layout)
196 {
197 mdu_array_info_t info;
198 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
199 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
200 devname, strerror(errno));
201 return 1;
202 }
203 info.layout = layout;
204 printf("layout set to %d\n", info.layout);
205 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
206 fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
207 devname, strerror(errno));
208 return 1;
209 }
210 return 0;
211 }
212
213 int Manage_subdevs(char *devname, int fd,
214 mddev_dev_t devlist, int verbose)
215 {
216 /* do something to each dev.
217 * devmode can be
218 * 'a' - add the device
219 * try HOT_ADD_DISK
220 * If that fails EINVAL, try ADD_NEW_DISK
221 * 'r' - remove the device HOT_REMOVE_DISK
222 * device can be 'faulty' or 'detached' in which case all
223 * matching devices are removed.
224 * 'f' - set the device faulty SET_DISK_FAULTY
225 * device can be 'detached' in which case any device that
226 * is inaccessible will be marked faulty.
227 */
228 mdu_array_info_t array;
229 mdu_disk_info_t disc;
230 unsigned long long array_size;
231 mddev_dev_t dv, next = NULL;
232 struct stat stb;
233 int j, jnext = 0;
234 int tfd;
235 struct supertype *st, *tst;
236 int duuid[4];
237 int ouuid[4];
238 int lfd = -1;
239
240 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
241 fprintf(stderr, Name ": cannot get array info for %s\n",
242 devname);
243 return 1;
244 }
245
246 /* array.size is only 32 bit and may be truncated.
247 * So read from sysfs if possible, and record number of sectors
248 */
249
250 array_size = get_component_size(fd);
251 if (array_size <= 0)
252 array_size = array.size * 2;
253
254 tst = super_by_fd(fd);
255 if (!tst) {
256 fprintf(stderr, Name ": unsupport array - version %d.%d\n",
257 array.major_version, array.minor_version);
258 return 1;
259 }
260
261 for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
262 unsigned long long ldsize;
263 char dvname[20];
264 char *dnprintable = dv->devname;
265 int err;
266
267 next = dv->next;
268 jnext = 0;
269
270 if (strcmp(dv->devname, "failed")==0 ||
271 strcmp(dv->devname, "faulty")==0) {
272 if (dv->disposition != 'r') {
273 fprintf(stderr, Name ": %s only meaningful "
274 "with -r, not -%c\n",
275 dv->devname, dv->disposition);
276 return 1;
277 }
278 for (; j < array.raid_disks + array.nr_disks ; j++) {
279 disc.number = j;
280 if (ioctl(fd, GET_DISK_INFO, &disc))
281 continue;
282 if (disc.major == 0 && disc.minor == 0)
283 continue;
284 if ((disc.state & 1) == 0) /* faulty */
285 continue;
286 stb.st_rdev = makedev(disc.major, disc.minor);
287 next = dv;
288 jnext = j+1;
289 sprintf(dvname,"%d:%d", disc.major, disc.minor);
290 dnprintable = dvname;
291 break;
292 }
293 if (jnext == 0)
294 continue;
295 } else if (strcmp(dv->devname, "detached") == 0) {
296 if (dv->disposition != 'r' && dv->disposition != 'f') {
297 fprintf(stderr, Name ": %s only meaningful "
298 "with -r of -f, not -%c\n",
299 dv->devname, dv->disposition);
300 return 1;
301 }
302 for (; j < array.raid_disks + array.nr_disks; j++) {
303 int sfd;
304 disc.number = j;
305 if (ioctl(fd, GET_DISK_INFO, &disc))
306 continue;
307 if (disc.major == 0 && disc.minor == 0)
308 continue;
309 sprintf(dvname,"%d:%d", disc.major, disc.minor);
310 sfd = dev_open(dvname, O_RDONLY);
311 if (sfd >= 0) {
312 close(sfd);
313 continue;
314 }
315 if (dv->disposition == 'f' &&
316 (disc.state & 1) == 1) /* already faulty */
317 continue;
318 if (errno != ENXIO)
319 continue;
320 stb.st_rdev = makedev(disc.major, disc.minor);
321 next = dv;
322 jnext = j+1;
323 dnprintable = dvname;
324 break;
325 }
326 if (jnext == 0)
327 continue;
328 } else {
329 j = 0;
330
331 if (stat(dv->devname, &stb)) {
332 fprintf(stderr, Name ": cannot find %s: %s\n",
333 dv->devname, strerror(errno));
334 return 1;
335 }
336 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
337 fprintf(stderr, Name ": %s is not a "
338 "block device.\n",
339 dv->devname);
340 return 1;
341 }
342 }
343 switch(dv->disposition){
344 default:
345 fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
346 dv->devname, dv->disposition);
347 return 1;
348 case 'a':
349 /* add the device */
350 if (tst->subarray[0]) {
351 fprintf(stderr, Name ": Cannot add disks to a"
352 " \'member\' array, perform this"
353 " operation on the parent container\n");
354 return 1;
355 }
356 /* Make sure it isn't in use (in 2.6 or later) */
357 tfd = open(dv->devname, O_RDONLY|O_EXCL|O_DIRECT);
358 if (tfd < 0) {
359 fprintf(stderr, Name ": Cannot open %s: %s\n",
360 dv->devname, strerror(errno));
361 return 1;
362 }
363 remove_partitions(tfd);
364
365 st = dup_super(tst);
366
367 if (array.not_persistent==0)
368 st->ss->load_super(st, tfd, NULL);
369
370 if (!get_dev_size(tfd, dv->devname, &ldsize)) {
371 close(tfd);
372 return 1;
373 }
374 close(tfd);
375
376
377 if (!tst->ss->external &&
378 array.major_version == 0 &&
379 md_get_version(fd)%100 < 2) {
380 if (ioctl(fd, HOT_ADD_DISK,
381 (unsigned long)stb.st_rdev)==0) {
382 if (verbose >= 0)
383 fprintf(stderr, Name ": hot added %s\n",
384 dv->devname);
385 continue;
386 }
387
388 fprintf(stderr, Name ": hot add failed for %s: %s\n",
389 dv->devname, strerror(errno));
390 return 1;
391 }
392
393 if (array.not_persistent == 0) {
394
395 /* Make sure device is large enough */
396 if (tst->ss->avail_size(tst, ldsize/512) <
397 array_size) {
398 fprintf(stderr, Name ": %s not large enough to join array\n",
399 dv->devname);
400 return 1;
401 }
402
403 /* need to find a sample superblock to copy, and
404 * a spare slot to use
405 */
406 for (j = 0; j < tst->max_devs; j++) {
407 char *dev;
408 int dfd;
409 disc.number = j;
410 if (ioctl(fd, GET_DISK_INFO, &disc))
411 continue;
412 if (disc.major==0 && disc.minor==0)
413 continue;
414 if ((disc.state & 4)==0) continue; /* sync */
415 /* Looks like a good device to try */
416 dev = map_dev(disc.major, disc.minor, 1);
417 if (!dev) continue;
418 dfd = dev_open(dev, O_RDONLY);
419 if (dfd < 0) continue;
420 if (tst->ss->load_super(tst, dfd,
421 NULL)) {
422 close(dfd);
423 continue;
424 }
425 close(dfd);
426 break;
427 }
428 if (!tst->sb) {
429 fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
430 return 1;
431 }
432 /* Possibly this device was recently part of the array
433 * and was temporarily removed, and is now being re-added.
434 * If so, we can simply re-add it.
435 */
436 tst->ss->uuid_from_super(tst, duuid);
437
438 /* re-add doesn't work for version-1 superblocks
439 * before 2.6.18 :-(
440 */
441 if (array.major_version == 1 &&
442 get_linux_version() <= 2006018)
443 ;
444 else if (st->sb) {
445 st->ss->uuid_from_super(st, ouuid);
446 if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
447 /* looks close enough for now. Kernel
448 * will worry about whether a bitmap
449 * based reconstruction is possible.
450 */
451 struct mdinfo mdi;
452 st->ss->getinfo_super(st, &mdi);
453 disc.major = major(stb.st_rdev);
454 disc.minor = minor(stb.st_rdev);
455 disc.number = mdi.disk.number;
456 disc.raid_disk = mdi.disk.raid_disk;
457 disc.state = mdi.disk.state;
458 if (dv->writemostly)
459 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
460 if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
461 if (verbose >= 0)
462 fprintf(stderr, Name ": re-added %s\n", dv->devname);
463 continue;
464 }
465 /* fall back on normal-add */
466 }
467 }
468 } else {
469 /* non-persistent. Must ensure that new drive
470 * is at least array.size big.
471 */
472 if (ldsize/512 < array_size) {
473 fprintf(stderr, Name ": %s not large enough to join array\n",
474 dv->devname);
475 return 1;
476 }
477 }
478 /* in 2.6.17 and earlier, version-1 superblocks won't
479 * use the number we write, but will choose a free number.
480 * we must choose the same free number, which requires
481 * starting at 'raid_disks' and counting up
482 */
483 for (j = array.raid_disks; j< tst->max_devs; j++) {
484 disc.number = j;
485 if (ioctl(fd, GET_DISK_INFO, &disc))
486 break;
487 if (disc.major==0 && disc.minor==0)
488 break;
489 if (disc.state & 8) /* removed */
490 break;
491 }
492 disc.major = major(stb.st_rdev);
493 disc.minor = minor(stb.st_rdev);
494 disc.number =j;
495 disc.state = 0;
496 if (array.not_persistent==0) {
497 int dfd;
498 if (dv->writemostly)
499 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
500 dfd = open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
501 tst->ss->add_to_super(tst, &disc, dfd,
502 dv->devname);
503 /* write_init_super will close 'dfd' */
504 if (tst->ss->write_init_super(tst))
505 return 1;
506 } else if (dv->re_add) {
507 /* this had better be raid1.
508 * As we are "--re-add"ing we must find a spare slot
509 * to fill.
510 */
511 char *used = malloc(array.raid_disks);
512 memset(used, 0, array.raid_disks);
513 for (j=0; j< tst->max_devs; j++) {
514 mdu_disk_info_t disc2;
515 disc2.number = j;
516 if (ioctl(fd, GET_DISK_INFO, &disc2))
517 continue;
518 if (disc2.major==0 && disc2.minor==0)
519 continue;
520 if (disc2.state & 8) /* removed */
521 continue;
522 if (disc2.raid_disk < 0)
523 continue;
524 if (disc2.raid_disk > array.raid_disks)
525 continue;
526 used[disc2.raid_disk] = 1;
527 }
528 for (j=0 ; j<array.raid_disks; j++)
529 if (!used[j]) {
530 disc.raid_disk = j;
531 disc.state |= (1<<MD_DISK_SYNC);
532 break;
533 }
534 }
535 if (dv->writemostly)
536 disc.state |= (1 << MD_DISK_WRITEMOSTLY);
537 if (ioctl(fd,ADD_NEW_DISK, &disc)) {
538 fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
539 dv->devname, j, strerror(errno));
540 return 1;
541 }
542 if (verbose >= 0)
543 fprintf(stderr, Name ": added %s\n", dv->devname);
544 break;
545
546 case 'r':
547 /* hot remove */
548 if (tst->subarray[0]) {
549 fprintf(stderr, Name ": Cannot remove disks from a"
550 " \'member\' array, perform this"
551 " operation on the parent container\n");
552 return 1;
553 }
554 if (tst->ss->external) {
555 /* To remove a device from a container, we must
556 * check that it isn't in use in an array.
557 * This involves looking in the 'holders'
558 * directory - there must be just one entry,
559 * the container.
560 * To ensure that it doesn't get used as a
561 * hold spare while we are checking, we
562 * get an O_EXCL open on the container
563 */
564 int dnum = fd2devnum(fd);
565 lfd = open_dev_excl(dnum);
566 if (lfd < 0) {
567 fprintf(stderr, Name
568 ": Cannot get exclusive access "
569 " to container - odd\n");
570 return 1;
571 }
572 if (!sysfs_unique_holder(dnum, stb.st_rdev)) {
573 fprintf(stderr, Name
574 ": %s is %s, cannot remove.\n",
575 dnprintable,
576 errno == EEXIST ? "still in use":
577 "not a member");
578 close(lfd);
579 return 1;
580 }
581 }
582 /* FIXME check that it is a current member */
583 err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev);
584 if (err && errno == ENODEV) {
585 /* Old kernels rejected this if no personality
586 * registered */
587 struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS);
588 struct mdinfo *dv = NULL;
589 if (sra)
590 dv = sra->devs;
591 for ( ; dv ; dv=dv->next)
592 if (dv->disk.major == major(stb.st_rdev) &&
593 dv->disk.minor == minor(stb.st_rdev))
594 break;
595 if (dv)
596 err = sysfs_set_str(sra, dv,
597 "state", "remove");
598 else
599 err = -1;
600 if (sra)
601 sysfs_free(sra);
602 }
603 if (err) {
604 fprintf(stderr, Name ": hot remove failed "
605 "for %s: %s\n", dnprintable,
606 strerror(errno));
607 if (lfd >= 0)
608 close(lfd);
609 return 1;
610 }
611 close(lfd);
612 if (verbose >= 0)
613 fprintf(stderr, Name ": hot removed %s\n",
614 dnprintable);
615 break;
616
617 case 'f': /* set faulty */
618 /* FIXME check current member */
619 if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
620 fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
621 dnprintable, strerror(errno));
622 return 1;
623 }
624 if (verbose >= 0)
625 fprintf(stderr, Name ": set %s faulty in %s\n",
626 dnprintable, devname);
627 break;
628 }
629 }
630 return 0;
631
632 }
633
634 int autodetect(void)
635 {
636 /* Open any md device, and issue the RAID_AUTORUN ioctl */
637 int rv = 1;
638 int fd = dev_open("9:0", O_RDONLY);
639 if (fd >= 0) {
640 if (ioctl(fd, RAID_AUTORUN, 0) == 0)
641 rv = 0;
642 close(fd);
643 }
644 return rv;
645 }
646 #endif
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