handle Manage_subdevs() for 'external' arrays
[thirdparty/mdadm.git] / Manage.c
CommitLineData
64c4757e 1/*
9a9dab36 2 * mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e 3 *
4f589ad0 4 * Copyright (C) 2001-2006 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
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
9a9dab36 30#include "mdadm.h"
682c7051
NB
31#include "md_u.h"
32#include "md_p.h"
64c4757e 33
82b27616
NB
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
64c4757e
NB
38int Manage_ro(char *devname, int fd, int readonly)
39{
682c7051
NB
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;
aba69144 48
682c7051
NB
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 }
aba69144 58
682c7051
NB
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)) {
82b27616 67 fprintf(stderr, Name ": failed to set writable for %s: %s\n",
682c7051
NB
68 devname, strerror(errno));
69 return 1;
70 }
71 }
aba69144 72 return 0;
64c4757e
NB
73}
74
435d4ebb
LB
75#ifndef MDASSEMBLE
76
91f068bf 77int Manage_runstop(char *devname, int fd, int runstop, int quiet)
64c4757e 78{
682c7051
NB
79 /* Run or stop the array. array must already be configured
80 * required >= 0.90.0
81 */
682c7051 82 mdu_param_t param; /* unused */
82b27616
NB
83
84 if (runstop == -1 && md_get_version(fd) < 9000) {
85 if (ioctl(fd, STOP_MD, 0)) {
91f068bf
NB
86 if (!quiet) fprintf(stderr, Name ": stopping device %s failed: %s\n",
87 devname, strerror(errno));
82b27616
NB
88 return 1;
89 }
90 }
aba69144 91
682c7051
NB
92 if (md_get_version(fd) < 9000) {
93 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
94 return 1;
95 }
82b27616 96 /*
682c7051
NB
97 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
98 fprintf(stderr, Name ": %s does not appear to be active.\n",
99 devname);
100 return 1;
101 }
82b27616 102 */
682c7051
NB
103 if (runstop>0) {
104 if (ioctl(fd, RUN_ARRAY, &param)) {
105 fprintf(stderr, Name ": failed to run array %s: %s\n",
106 devname, strerror(errno));
107 return 1;
108 }
8382f19b
NB
109 if (quiet <= 0)
110 fprintf(stderr, Name ": started %s\n", devname);
682c7051 111 } else if (runstop < 0){
8382f19b
NB
112 struct map_ent *map = NULL;
113 struct stat stb;
682c7051 114 if (ioctl(fd, STOP_ARRAY, NULL)) {
ab56093f 115 if (quiet==0)
91f068bf
NB
116 fprintf(stderr, Name ": fail to stop array %s: %s\n",
117 devname, strerror(errno));
682c7051
NB
118 return 1;
119 }
ab56093f
NB
120 if (quiet <= 0)
121 fprintf(stderr, Name ": stopped %s\n", devname);
8382f19b
NB
122 if (fstat(fd, &stb) == 0) {
123 int devnum;
124 if (major(stb.st_rdev) == MD_MAJOR)
125 devnum = minor(stb.st_rdev);
126 else
127 devnum = -1-(minor(stb.st_rdev)>>6);
128 map_delete(&map, devnum);
129 map_write(map);
130 map_free(map);
131 }
682c7051
NB
132 }
133 return 0;
64c4757e
NB
134}
135
dd0781e5
NB
136int Manage_resize(char *devname, int fd, long long size, int raid_disks)
137{
138 mdu_array_info_t info;
139 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
140 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
141 devname, strerror(errno));
142 return 1;
143 }
144 if (size >= 0)
145 info.size = size;
146 if (raid_disks > 0)
147 info.raid_disks = raid_disks;
148 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
149 fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
150 devname, strerror(errno));
151 return 1;
152 }
153 return 0;
154}
155
b5e64645
NB
156int Manage_reconfig(char *devname, int fd, int layout)
157{
158 mdu_array_info_t info;
159 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
160 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
161 devname, strerror(errno));
162 return 1;
163 }
164 info.layout = layout;
165 printf("layout set to %d\n", info.layout);
166 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
167 fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
168 devname, strerror(errno));
169 return 1;
170 }
171 return 0;
172}
dd0781e5 173
f7dd881f
DW
174static int
175add_remove_device_container(int fd, int add_remove, struct stat *stb)
176{
177 int devnum = fd2devnum(fd);
178 char *devname = devnum2devname(devnum);
179 int sfd = devname ? connect_monitor(devname) : -1;
180 struct md_message msg;
181 int err = 0;
182
183 if (devname && sfd < 0) {
184 fprintf(stderr, Name ": Cannot connect to monitor for %s: %s\n",
185 devname, strerror(errno));
186 free(devname);
187 return 1;
188 } else if (sfd < 0) {
189 fprintf(stderr, Name ": Cannot determine container name for"
190 " device number %d\n", devnum);
191 return 1;
192 }
193
194 if (add_remove)
195 ack(sfd, 0, 0);
196 else if (send_remove_device(sfd, stb->st_rdev, 0, 0) != 0) {
197 fprintf(stderr, Name ": Failed to send \'%s device\'"
198 " message to the container monitor\n",
199 add_remove ? "add" : "remove");
200 err = 1;
201 }
202
203 /* check the reply */
204 if (!err && receive_message(sfd, &msg, 0) != 0) {
205 fprintf(stderr, Name ": Failed to receive an acknowledgement"
206 " from the container monitor\n");
207 err = 1;
208 }
209
210 if (!err && msg.seq != 0) {
211 fprintf(stderr, Name ": %s device failed error code %d\n",
212 add_remove ? "Add" : "Remove", msg.seq);
213 err = 1;
214 }
215
216 free(devname);
217 close(sfd);
218
219 return err;
220}
221
64c4757e 222int Manage_subdevs(char *devname, int fd,
dab6685f 223 mddev_dev_t devlist, int verbose)
cd29a5c8 224{
682c7051
NB
225 /* do something to each dev.
226 * devmode can be
227 * 'a' - add the device
228 * try HOT_ADD_DISK
229 * If that fails EINVAL, try ADD_NEW_DISK
230 * 'r' - remove the device HOT_REMOVE_DISK
b80da661
NB
231 * device can be 'faulty' or 'detached' in which case all
232 * matching devices are removed.
682c7051 233 * 'f' - set the device faulty SET_DISK_FAULTY
b80da661
NB
234 * device can be 'detached' in which case any device that
235 * is inaccessible will be marked faulty.
682c7051
NB
236 */
237 mdu_array_info_t array;
238 mdu_disk_info_t disc;
7a3be72f 239 unsigned long long array_size;
b80da661 240 mddev_dev_t dv, next = NULL;
682c7051 241 struct stat stb;
b80da661 242 int j, jnext = 0;
0fbf459d 243 int tfd;
3da92f27 244 struct supertype *st, *tst;
fe80f49b
NB
245 int duuid[4];
246 int ouuid[4];
682c7051
NB
247
248 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
249 fprintf(stderr, Name ": cannot get array info for %s\n",
250 devname);
251 return 1;
252 }
3da92f27 253
7a3be72f
NB
254 /* array.size is only 32 bit and may be truncated.
255 * So read from sysfs if possible, and record number of sectors
256 */
257
258 array_size = get_component_size(fd);
259 if (array_size <= 0)
260 array_size = array.size * 2;
261
1686dc25 262 tst = super_by_fd(fd);
3da92f27
NB
263 if (!tst) {
264 fprintf(stderr, Name ": unsupport array - version %d.%d\n",
265 array.major_version, array.minor_version);
266 return 1;
267 }
268
b80da661 269 for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
4a39c6f2 270 unsigned long long ldsize;
b80da661
NB
271 char dvname[20];
272 char *dnprintable = dv->devname;
4a39c6f2 273
b80da661
NB
274 next = dv->next;
275 jnext = 0;
276
277 if (strcmp(dv->devname, "failed")==0 ||
278 strcmp(dv->devname, "faulty")==0) {
279 if (dv->disposition != 'r') {
280 fprintf(stderr, Name ": %s only meaningful "
281 "with -r, not -%c\n",
282 dv->devname, dv->disposition);
283 return 1;
284 }
285 for (; j < array.raid_disks + array.nr_disks ; j++) {
286 disc.number = j;
287 if (ioctl(fd, GET_DISK_INFO, &disc))
288 continue;
289 if (disc.major == 0 && disc.minor == 0)
290 continue;
291 if ((disc.state & 1) == 0) /* faulty */
292 continue;
293 stb.st_rdev = makedev(disc.major, disc.minor);
294 next = dv;
295 jnext = j+1;
296 sprintf(dvname,"%d:%d", disc.major, disc.minor);
297 dnprintable = dvname;
298 break;
299 }
300 if (jnext == 0)
301 continue;
302 } else if (strcmp(dv->devname, "detached") == 0) {
303 if (dv->disposition != 'r' && dv->disposition != 'f') {
304 fprintf(stderr, Name ": %s only meaningful "
305 "with -r of -f, not -%c\n",
306 dv->devname, dv->disposition);
307 return 1;
308 }
309 for (; j < array.raid_disks + array.nr_disks; j++) {
310 int sfd;
311 disc.number = j;
312 if (ioctl(fd, GET_DISK_INFO, &disc))
313 continue;
314 if (disc.major == 0 && disc.minor == 0)
315 continue;
316 sprintf(dvname,"%d:%d", disc.major, disc.minor);
317 sfd = dev_open(dvname, O_RDONLY);
318 if (sfd >= 0) {
319 close(sfd);
320 continue;
321 }
322 if (dv->disposition == 'f' &&
323 (disc.state & 1) == 1) /* already faulty */
324 continue;
325 if (errno != ENXIO)
326 continue;
327 stb.st_rdev = makedev(disc.major, disc.minor);
328 next = dv;
329 jnext = j+1;
330 dnprintable = dvname;
331 break;
332 }
333 if (jnext == 0)
334 continue;
335 } else {
336 j = 0;
337
338 if (stat(dv->devname, &stb)) {
339 fprintf(stderr, Name ": cannot find %s: %s\n",
340 dv->devname, strerror(errno));
341 return 1;
342 }
343 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
344 fprintf(stderr, Name ": %s is not a "
345 "block device.\n",
346 dv->devname);
347 return 1;
348 }
682c7051 349 }
cd29a5c8 350 switch(dv->disposition){
682c7051 351 default:
c913b90e
NB
352 fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
353 dv->devname, dv->disposition);
682c7051
NB
354 return 1;
355 case 'a':
4a39c6f2 356 /* add the device */
f7dd881f
DW
357 if (tst == &supertype_container_member) {
358 fprintf(stderr, Name ": Cannot add disks to a"
359 " \'member\' array, perform this"
360 " operation on the parent container\n");
361 return 1;
362 } else if (tst->ss->external)
363 return add_remove_device_container(fd, 1, &stb);
f277ce36 364 /* Make sure it isn't in use (in 2.6 or later) */
0fbf459d
NB
365 tfd = open(dv->devname, O_RDONLY|O_EXCL);
366 if (tfd < 0) {
d7eaf49f
NB
367 fprintf(stderr, Name ": Cannot open %s: %s\n",
368 dv->devname, strerror(errno));
369 return 1;
370 }
25037aa8 371 remove_partitions(tfd);
3da92f27 372
1686dc25 373 st = dup_super(tst);
3da92f27 374
fe80f49b 375 if (array.not_persistent==0)
3da92f27
NB
376 st->ss->load_super(st, tfd, NULL);
377
beae1dfe 378 if (!get_dev_size(tfd, dv->devname, &ldsize)) {
4a39c6f2
NB
379 close(tfd);
380 return 1;
4a39c6f2 381 }
0fbf459d 382 close(tfd);
fe80f49b 383
60d9a174
NB
384 if (array.major_version == 0 &&
385 md_get_version(fd)%100 < 2) {
892debc8
NB
386 if (ioctl(fd, HOT_ADD_DISK,
387 (unsigned long)stb.st_rdev)==0) {
dab6685f
NB
388 if (verbose >= 0)
389 fprintf(stderr, Name ": hot added %s\n",
390 dv->devname);
892debc8
NB
391 continue;
392 }
393
cd29a5c8 394 fprintf(stderr, Name ": hot add failed for %s: %s\n",
892debc8 395 dv->devname, strerror(errno));
cd29a5c8
NB
396 return 1;
397 }
892debc8 398
fe80f49b
NB
399 if (array.not_persistent == 0) {
400
4a39c6f2 401 /* Make sure device is large enough */
3da92f27 402 if (tst->ss->avail_size(tst, ldsize/512) <
7a3be72f 403 array_size) {
4a39c6f2
NB
404 fprintf(stderr, Name ": %s not large enough to join array\n",
405 dv->devname);
406 return 1;
407 }
408
fe80f49b 409 /* need to find a sample superblock to copy, and
aba69144 410 * a spare slot to use
fe80f49b 411 */
3da92f27 412 for (j = 0; j < tst->max_devs; j++) {
fe80f49b
NB
413 char *dev;
414 int dfd;
415 disc.number = j;
416 if (ioctl(fd, GET_DISK_INFO, &disc))
417 continue;
418 if (disc.major==0 && disc.minor==0)
419 continue;
420 if ((disc.state & 4)==0) continue; /* sync */
421 /* Looks like a good device to try */
16c6fa80 422 dev = map_dev(disc.major, disc.minor, 1);
fe80f49b 423 if (!dev) continue;
16c6fa80 424 dfd = dev_open(dev, O_RDONLY);
fe80f49b 425 if (dfd < 0) continue;
3da92f27
NB
426 if (tst->ss->load_super(tst, dfd,
427 NULL)) {
fe80f49b
NB
428 close(dfd);
429 continue;
430 }
892debc8 431 close(dfd);
fe80f49b
NB
432 break;
433 }
3da92f27 434 if (!tst->sb) {
fe80f49b
NB
435 fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
436 return 1;
437 }
438 /* Possibly this device was recently part of the array
439 * and was temporarily removed, and is now being re-added.
440 * If so, we can simply re-add it.
441 */
3da92f27 442 tst->ss->uuid_from_super(tst, duuid);
7eae7080
NB
443
444 /* re-add doesn't work for version-1 superblocks
445 * before 2.6.18 :-(
446 */
447 if (array.major_version == 1 &&
448 get_linux_version() <= 2006018)
449 ;
3da92f27
NB
450 else if (st->sb) {
451 st->ss->uuid_from_super(st, ouuid);
fe80f49b 452 if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
4d20d744
NB
453 /* looks close enough for now. Kernel
454 * will worry about whether a bitmap
455 * based reconstruction is possible.
fe80f49b
NB
456 */
457 struct mdinfo mdi;
3da92f27 458 st->ss->getinfo_super(st, &mdi);
fe80f49b
NB
459 disc.major = major(stb.st_rdev);
460 disc.minor = minor(stb.st_rdev);
461 disc.number = mdi.disk.number;
462 disc.raid_disk = mdi.disk.raid_disk;
463 disc.state = mdi.disk.state;
4d20d744
NB
464 if (dv->writemostly)
465 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
fe80f49b
NB
466 if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
467 if (verbose >= 0)
468 fprintf(stderr, Name ": re-added %s\n", dv->devname);
308e1801 469 continue;
fe80f49b
NB
470 }
471 /* fall back on normal-add */
472 }
892debc8 473 }
4a39c6f2
NB
474 } else {
475 /* non-persistent. Must ensure that new drive
476 * is at least array.size big.
477 */
7a3be72f 478 if (ldsize/512 < array_size) {
4a39c6f2
NB
479 fprintf(stderr, Name ": %s not large enough to join array\n",
480 dv->devname);
481 return 1;
482 }
892debc8 483 }
7eae7080
NB
484 /* in 2.6.17 and earlier, version-1 superblocks won't
485 * use the number we write, but will choose a free number.
486 * we must choose the same free number, which requires
487 * starting at 'raid_disks' and counting up
488 */
3da92f27 489 for (j = array.raid_disks; j< tst->max_devs; j++) {
aa88f531 490 disc.number = j;
682c7051
NB
491 if (ioctl(fd, GET_DISK_INFO, &disc))
492 break;
493 if (disc.major==0 && disc.minor==0)
494 break;
495 if (disc.state & 8) /* removed */
496 break;
497 }
0df46c2a
NB
498 disc.major = major(stb.st_rdev);
499 disc.minor = minor(stb.st_rdev);
892debc8
NB
500 disc.number =j;
501 disc.state = 0;
fe80f49b 502 if (array.not_persistent==0) {
111d01fc 503 int dfd;
fe80f49b
NB
504 if (dv->writemostly)
505 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
111d01fc
NB
506 dfd = open(dv->devname, O_RDWR | O_EXCL);
507 tst->ss->add_to_super(tst, &disc, dfd,
508 dv->devname);
509 /* write_init_super will close 'dfd' */
510 if (tst->ss->write_init_super(tst))
fe80f49b
NB
511 return 1;
512 } else if (dv->re_add) {
513 /* this had better be raid1.
514 * As we are "--re-add"ing we must find a spare slot
515 * to fill.
516 */
517 char *used = malloc(array.raid_disks);
518 memset(used, 0, array.raid_disks);
3da92f27 519 for (j=0; j< tst->max_devs; j++) {
fe80f49b
NB
520 mdu_disk_info_t disc2;
521 disc2.number = j;
522 if (ioctl(fd, GET_DISK_INFO, &disc2))
523 continue;
524 if (disc2.major==0 && disc2.minor==0)
525 continue;
526 if (disc2.state & 8) /* removed */
527 continue;
528 if (disc2.raid_disk < 0)
529 continue;
530 if (disc2.raid_disk > array.raid_disks)
531 continue;
532 used[disc2.raid_disk] = 1;
533 }
534 for (j=0 ; j<array.raid_disks; j++)
535 if (!used[j]) {
536 disc.raid_disk = j;
537 disc.state |= (1<<MD_DISK_SYNC);
538 break;
539 }
540 }
d8def61c
NB
541 if (dv->writemostly)
542 disc.state |= (1 << MD_DISK_WRITEMOSTLY);
682c7051 543 if (ioctl(fd,ADD_NEW_DISK, &disc)) {
f277ce36
NB
544 fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
545 dv->devname, j, strerror(errno));
682c7051
NB
546 return 1;
547 }
dab6685f
NB
548 if (verbose >= 0)
549 fprintf(stderr, Name ": added %s\n", dv->devname);
682c7051
NB
550 break;
551
552 case 'r':
553 /* hot remove */
f7dd881f
DW
554 if (tst == &supertype_container_member) {
555 fprintf(stderr, Name ": Cannot remove disks from a"
556 " \'member\' array, perform this"
557 " operation on the parent container\n");
558 return 1;
559 } else if (tst->ss->external)
560 return add_remove_device_container(fd, 0, &stb);
82b27616 561 /* FIXME check that it is a current member */
cd29a5c8 562 if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
b80da661
NB
563 fprintf(stderr, Name ": hot remove failed "
564 "for %s: %s\n", dnprintable,
565 strerror(errno));
682c7051
NB
566 return 1;
567 }
dab6685f 568 if (verbose >= 0)
b80da661
NB
569 fprintf(stderr, Name ": hot removed %s\n",
570 dnprintable);
682c7051
NB
571 break;
572
573 case 'f': /* set faulty */
574 /* FIXME check current member */
cd29a5c8 575 if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
b83d95f3 576 fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
b80da661 577 dnprintable, strerror(errno));
682c7051
NB
578 return 1;
579 }
dab6685f
NB
580 if (verbose >= 0)
581 fprintf(stderr, Name ": set %s faulty in %s\n",
b80da661 582 dnprintable, devname);
682c7051
NB
583 break;
584 }
585 }
586 return 0;
aba69144 587
64c4757e 588}
1f48664b
NB
589
590int autodetect(void)
591{
592 /* Open any md device, and issue the RAID_AUTORUN ioctl */
593 int rv = 1;
594 int fd = dev_open("9:0", O_RDONLY);
595 if (fd >= 0) {
596 if (ioctl(fd, RAID_AUTORUN, 0) == 0)
597 rv = 0;
598 close(fd);
599 }
600 return rv;
601}
435d4ebb 602#endif