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Manage/external: for external metadata, add_to_super needs lock on container.
[thirdparty/mdadm.git] / Manage.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2009 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@suse.de>
23 */
24
25 #include "mdadm.h"
26 #include "md_u.h"
27 #include "md_p.h"
28 #include <ctype.h>
29
30 #define REGISTER_DEV _IO (MD_MAJOR, 1)
31 #define START_MD _IO (MD_MAJOR, 2)
32 #define STOP_MD _IO (MD_MAJOR, 3)
33
34 int Manage_ro(char *devname, int fd, int readonly)
35 {
36 /* switch to readonly or rw
37 *
38 * requires >= 0.90.0
39 * first check that array is runing
40 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
41 *
42 */
43 mdu_array_info_t array;
44 #ifndef MDASSEMBLE
45 struct mdinfo *mdi;
46 #endif
47
48 if (md_get_version(fd) < 9000) {
49 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
50 return 1;
51 }
52 #ifndef MDASSEMBLE
53 /* If this is an externally-manage array, we need to modify the
54 * metadata_version so that mdmon doesn't undo our change.
55 */
56 mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
57 if (mdi &&
58 mdi->array.major_version == -1 &&
59 mdi->array.level > 0 &&
60 is_subarray(mdi->text_version)) {
61 char vers[64];
62 strcpy(vers, "external:");
63 strcat(vers, mdi->text_version);
64 if (readonly > 0) {
65 int rv;
66 /* We set readonly ourselves. */
67 vers[9] = '-';
68 sysfs_set_str(mdi, NULL, "metadata_version", vers);
69
70 close(fd);
71 rv = sysfs_set_str(mdi, NULL, "array_state", "readonly");
72
73 if (rv < 0) {
74 fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
75 devname, strerror(errno));
76
77 vers[9] = mdi->text_version[0];
78 sysfs_set_str(mdi, NULL, "metadata_version", vers);
79 return 1;
80 }
81 } else {
82 char *cp;
83 /* We cannot set read/write - must signal mdmon */
84 vers[9] = '/';
85 sysfs_set_str(mdi, NULL, "metadata_version", vers);
86
87 cp = strchr(vers+10, '/');
88 if (*cp)
89 *cp = 0;
90 ping_monitor(vers+10);
91 }
92 return 0;
93 }
94 #endif
95 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
96 fprintf(stderr, Name ": %s does not appear to be active.\n",
97 devname);
98 return 1;
99 }
100
101 if (readonly>0) {
102 if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
103 fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
104 devname, strerror(errno));
105 return 1;
106 }
107 } else if (readonly < 0) {
108 if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
109 fprintf(stderr, Name ": failed to set writable for %s: %s\n",
110 devname, strerror(errno));
111 return 1;
112 }
113 }
114 return 0;
115 }
116
117 #ifndef MDASSEMBLE
118
119 static void remove_devices(int devnum, char *path)
120 {
121 /*
122 * Remove names at 'path' - possibly with
123 * partition suffixes - which link to the 'standard'
124 * name for devnum. These were probably created
125 * by mdadm when the array was assembled.
126 */
127 char base[40];
128 char *path2;
129 char link[1024];
130 int n;
131 int part;
132 char *be;
133 char *pe;
134
135 if (!path)
136 return;
137
138 if (devnum >= 0)
139 sprintf(base, "/dev/md%d", devnum);
140 else
141 sprintf(base, "/dev/md_d%d", -1-devnum);
142 be = base + strlen(base);
143
144 path2 = malloc(strlen(path)+20);
145 strcpy(path2, path);
146 pe = path2 + strlen(path2);
147
148 for (part = 0; part < 16; part++) {
149 if (part) {
150 sprintf(be, "p%d", part);
151
152 if (isdigit(pe[-1]))
153 sprintf(pe, "p%d", part);
154 else
155 sprintf(pe, "%d", part);
156 }
157 n = readlink(path2, link, sizeof(link));
158 if (n && (int)strlen(base) == n &&
159 strncmp(link, base, n) == 0)
160 unlink(path2);
161 }
162 free(path2);
163 }
164
165
166 int Manage_runstop(char *devname, int fd, int runstop, int quiet)
167 {
168 /* Run or stop the array. array must already be configured
169 * required >= 0.90.0
170 * Only print failure messages if quiet == 0;
171 * quiet > 0 means really be quiet
172 * quiet < 0 means we will try again if it fails.
173 */
174 mdu_param_t param; /* unused */
175
176 if (runstop == -1 && md_get_version(fd) < 9000) {
177 if (ioctl(fd, STOP_MD, 0)) {
178 if (quiet == 0) fprintf(stderr,
179 Name ": stopping device %s "
180 "failed: %s\n",
181 devname, strerror(errno));
182 return 1;
183 }
184 }
185
186 if (md_get_version(fd) < 9000) {
187 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
188 return 1;
189 }
190 /*
191 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
192 fprintf(stderr, Name ": %s does not appear to be active.\n",
193 devname);
194 return 1;
195 }
196 */
197 if (runstop>0) {
198 if (ioctl(fd, RUN_ARRAY, &param)) {
199 fprintf(stderr, Name ": failed to run array %s: %s\n",
200 devname, strerror(errno));
201 return 1;
202 }
203 if (quiet <= 0)
204 fprintf(stderr, Name ": started %s\n", devname);
205 } else if (runstop < 0){
206 struct map_ent *map = NULL;
207 struct stat stb;
208 struct mdinfo *mdi;
209 int devnum;
210 /* If this is an mdmon managed array, just write 'inactive'
211 * to the array state and let mdmon clear up.
212 */
213 devnum = fd2devnum(fd);
214 mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
215 if (mdi &&
216 mdi->array.level > 0 &&
217 is_subarray(mdi->text_version)) {
218 /* This is mdmon managed. */
219 close(fd);
220 if (sysfs_set_str(mdi, NULL,
221 "array_state", "inactive") < 0) {
222 if (quiet == 0)
223 fprintf(stderr, Name
224 ": failed to stop array %s: %s\n",
225 devname, strerror(errno));
226 return 1;
227 }
228
229 /* Give monitor a chance to act */
230 ping_monitor(mdi->text_version);
231
232 fd = open(devname, O_RDONLY);
233 } else if (mdi &&
234 mdi->array.major_version == -1 &&
235 mdi->array.minor_version == -2 &&
236 !is_subarray(mdi->text_version)) {
237 struct mdstat_ent *mds, *m;
238 /* container, possibly mdmon-managed.
239 * Make sure mdmon isn't opening it, which
240 * would interfere with the 'stop'
241 */
242 ping_monitor(mdi->sys_name);
243
244 /* now check that there are no existing arrays
245 * which are members of this array
246 */
247 mds = mdstat_read(0, 0);
248 for (m=mds; m; m=m->next)
249 if (m->metadata_version &&
250 strncmp(m->metadata_version, "external:", 9)==0 &&
251 is_subarray(m->metadata_version+9) &&
252 devname2devnum(m->metadata_version+10) == devnum) {
253 if (!quiet)
254 fprintf(stderr, Name
255 ": Cannot stop container %s: "
256 "member %s still active\n",
257 devname, m->dev);
258 free_mdstat(mds);
259 if (mdi)
260 sysfs_free(mdi);
261 return 1;
262 }
263 }
264
265 if (fd >= 0 && ioctl(fd, STOP_ARRAY, NULL)) {
266 if (quiet == 0) {
267 fprintf(stderr, Name
268 ": failed to stop array %s: %s\n",
269 devname, strerror(errno));
270 if (errno == EBUSY)
271 fprintf(stderr, "Perhaps a running "
272 "process, mounted filesystem "
273 "or active volume group?\n");
274 }
275 if (mdi)
276 sysfs_free(mdi);
277 return 1;
278 }
279 /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
280 * was stopped, so We'll do it here just to be sure. Drop any
281 * partitions as well...
282 */
283 if (fd >= 0)
284 ioctl(fd, BLKRRPART, 0);
285 if (mdi)
286 sysfs_uevent(mdi, "change");
287
288
289 if (devnum != NoMdDev &&
290 (stat("/dev/.udev", &stb) != 0 ||
291 check_env("MDADM_NO_UDEV"))) {
292 struct map_ent *mp = map_by_devnum(&map, devnum);
293 remove_devices(devnum, mp ? mp->path : NULL);
294 }
295
296
297 if (quiet <= 0)
298 fprintf(stderr, Name ": stopped %s\n", devname);
299 map_lock(&map);
300 map_remove(&map, devnum);
301 map_unlock(&map);
302 }
303 return 0;
304 }
305
306 int Manage_resize(char *devname, int fd, long long size, int raid_disks)
307 {
308 mdu_array_info_t info;
309 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
310 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
311 devname, strerror(errno));
312 return 1;
313 }
314 if (size >= 0)
315 info.size = size;
316 if (raid_disks > 0)
317 info.raid_disks = raid_disks;
318 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
319 fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
320 devname, strerror(errno));
321 return 1;
322 }
323 return 0;
324 }
325
326 int Manage_subdevs(char *devname, int fd,
327 mddev_dev_t devlist, int verbose, int test)
328 {
329 /* do something to each dev.
330 * devmode can be
331 * 'a' - add the device
332 * try HOT_ADD_DISK
333 * If that fails EINVAL, try ADD_NEW_DISK
334 * 'r' - remove the device HOT_REMOVE_DISK
335 * device can be 'faulty' or 'detached' in which case all
336 * matching devices are removed.
337 * 'f' - set the device faulty SET_DISK_FAULTY
338 * device can be 'detached' in which case any device that
339 * is inaccessible will be marked faulty.
340 * For 'f' and 'r', the device can also be a kernel-internal
341 * name such as 'sdb'.
342 */
343 mddev_dev_t add_devlist = NULL;
344 mdu_array_info_t array;
345 mdu_disk_info_t disc;
346 unsigned long long array_size;
347 mddev_dev_t dv, next = NULL;
348 struct stat stb;
349 int j, jnext = 0;
350 int tfd = -1;
351 struct supertype *st, *tst;
352 int duuid[4];
353 int ouuid[4];
354 int lfd = -1;
355 int sysfd = -1;
356 int count = 0; /* number of actions taken */
357
358 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
359 fprintf(stderr, Name ": cannot get array info for %s\n",
360 devname);
361 return 1;
362 }
363
364 /* array.size is only 32 bit and may be truncated.
365 * So read from sysfs if possible, and record number of sectors
366 */
367
368 array_size = get_component_size(fd);
369 if (array_size <= 0)
370 array_size = array.size * 2;
371
372 tst = super_by_fd(fd);
373 if (!tst) {
374 fprintf(stderr, Name ": unsupport array - version %d.%d\n",
375 array.major_version, array.minor_version);
376 return 1;
377 }
378
379 stb.st_rdev = 0;
380 for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
381 unsigned long long ldsize;
382 char dvname[20];
383 char *dnprintable = dv->devname;
384 char *add_dev = dv->devname;
385 int err;
386 int re_add_failed = 0;
387
388 next = dv->next;
389 jnext = 0;
390
391 if (strcmp(dv->devname, "failed")==0 ||
392 strcmp(dv->devname, "faulty")==0) {
393 if (dv->disposition != 'r') {
394 fprintf(stderr, Name ": %s only meaningful "
395 "with -r, not -%c\n",
396 dv->devname, dv->disposition);
397 return 1;
398 }
399 for (; j < array.raid_disks + array.nr_disks ; j++) {
400 unsigned dev;
401 disc.number = j;
402 if (ioctl(fd, GET_DISK_INFO, &disc))
403 continue;
404 if (disc.major == 0 && disc.minor == 0)
405 continue;
406 if ((disc.state & 1) == 0) /* faulty */
407 continue;
408 dev = makedev(disc.major, disc.minor);
409 if (stb.st_rdev == dev)
410 /* already did that one */
411 continue;
412 stb.st_rdev = dev;
413 next = dv;
414 /* same slot again next time - things might
415 * have reshuffled */
416 jnext = j;
417 sprintf(dvname,"%d:%d", disc.major, disc.minor);
418 dnprintable = dvname;
419 break;
420 }
421 if (next != dv)
422 continue;
423 } else if (strcmp(dv->devname, "detached") == 0) {
424 if (dv->disposition != 'r' && dv->disposition != 'f') {
425 fprintf(stderr, Name ": %s only meaningful "
426 "with -r of -f, not -%c\n",
427 dv->devname, dv->disposition);
428 return 1;
429 }
430 for (; j < array.raid_disks + array.nr_disks; j++) {
431 int sfd;
432 unsigned dev;
433 disc.number = j;
434 if (ioctl(fd, GET_DISK_INFO, &disc))
435 continue;
436 if (disc.major == 0 && disc.minor == 0)
437 continue;
438 sprintf(dvname,"%d:%d", disc.major, disc.minor);
439 sfd = dev_open(dvname, O_RDONLY);
440 if (sfd >= 0) {
441 close(sfd);
442 continue;
443 }
444 if (dv->disposition == 'f' &&
445 (disc.state & 1) == 1) /* already faulty */
446 continue;
447 if (errno != ENXIO)
448 continue;
449 dev = makedev(disc.major, disc.minor);
450 if (stb.st_rdev == dev)
451 /* already did that one */
452 continue;
453 stb.st_rdev = dev;
454 next = dv;
455 /* same slot again next time - things might
456 * have reshuffled */
457 jnext = j;
458 dnprintable = dvname;
459 break;
460 }
461 if (next != dv)
462 continue;
463 } else if (strcmp(dv->devname, "missing") == 0) {
464 if (dv->disposition != 'a' || dv->re_add == 0) {
465 fprintf(stderr, Name ": 'missing' only meaningful "
466 "with --re-add\n");
467 return 1;
468 }
469 if (add_devlist == NULL)
470 add_devlist = conf_get_devs();
471 if (add_devlist == NULL) {
472 fprintf(stderr, Name ": no devices to scan for missing members.");
473 continue;
474 }
475 add_dev = add_devlist->devname;
476 add_devlist = add_devlist->next;
477 if (add_devlist != NULL)
478 next = dv;
479 if (stat(add_dev, &stb) < 0)
480 continue;
481 } else if (strchr(dv->devname, '/') == NULL &&
482 strchr(dv->devname, ':') == NULL &&
483 strlen(dv->devname) < 50) {
484 /* Assume this is a kernel-internal name like 'sda1' */
485 int found = 0;
486 char dname[55];
487 if (dv->disposition != 'r' && dv->disposition != 'f') {
488 fprintf(stderr, Name ": %s only meaningful "
489 "with -r or -f, not -%c\n",
490 dv->devname, dv->disposition);
491 return 1;
492 }
493
494 sprintf(dname, "dev-%s", dv->devname);
495 sysfd = sysfs_open(fd2devnum(fd), dname, "block/dev");
496 if (sysfd >= 0) {
497 char dn[20];
498 int mj,mn;
499 if (sysfs_fd_get_str(sysfd, dn, 20) > 0 &&
500 sscanf(dn, "%d:%d", &mj,&mn) == 2) {
501 stb.st_rdev = makedev(mj,mn);
502 found = 1;
503 }
504 close(sysfd);
505 sysfd = -1;
506 }
507 if (!found) {
508 sysfd = sysfs_open(fd2devnum(fd), dname, "state");
509 if (sysfd < 0) {
510 fprintf(stderr, Name ": %s does not appear "
511 "to be a component of %s\n",
512 dv->devname, devname);
513 return 1;
514 }
515 }
516 } else {
517 j = 0;
518
519 tfd = dev_open(dv->devname, O_RDONLY);
520 if (tfd < 0 && dv->disposition == 'r' &&
521 lstat(dv->devname, &stb) == 0)
522 /* Be happy, the lstat worked, that is
523 * enough for --remove
524 */
525 ;
526 else {
527 if (tfd < 0 || fstat(tfd, &stb) != 0) {
528 fprintf(stderr, Name ": cannot find %s: %s\n",
529 dv->devname, strerror(errno));
530 if (tfd >= 0)
531 close(tfd);
532 return 1;
533 }
534 close(tfd);
535 tfd = -1;
536 }
537 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
538 fprintf(stderr, Name ": %s is not a "
539 "block device.\n",
540 dv->devname);
541 return 1;
542 }
543 }
544 switch(dv->disposition){
545 default:
546 fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
547 dv->devname, dv->disposition);
548 return 1;
549 case 'a':
550 /* add the device */
551 if (tst->subarray[0]) {
552 fprintf(stderr, Name ": Cannot add disks to a"
553 " \'member\' array, perform this"
554 " operation on the parent container\n");
555 return 1;
556 }
557 /* Make sure it isn't in use (in 2.6 or later) */
558 tfd = dev_open(add_dev, O_RDONLY|O_EXCL|O_DIRECT);
559 if (tfd < 0 && add_dev != dv->devname)
560 continue;
561 if (tfd < 0) {
562 fprintf(stderr, Name ": Cannot open %s: %s\n",
563 dv->devname, strerror(errno));
564 return 1;
565 }
566
567 st = dup_super(tst);
568
569 if (array.not_persistent==0)
570 st->ss->load_super(st, tfd, NULL);
571
572 if (add_dev == dv->devname) {
573 if (!get_dev_size(tfd, dv->devname, &ldsize)) {
574 close(tfd);
575 return 1;
576 }
577 } else if (!get_dev_size(tfd, NULL, &ldsize)) {
578 close(tfd);
579 tfd = -1;
580 continue;
581 }
582
583 if (!tst->ss->external &&
584 array.major_version == 0 &&
585 md_get_version(fd)%100 < 2) {
586 close(tfd);
587 tfd = -1;
588 if (ioctl(fd, HOT_ADD_DISK,
589 (unsigned long)stb.st_rdev)==0) {
590 if (verbose >= 0)
591 fprintf(stderr, Name ": hot added %s\n",
592 add_dev);
593 continue;
594 }
595
596 fprintf(stderr, Name ": hot add failed for %s: %s\n",
597 add_dev, strerror(errno));
598 return 1;
599 }
600
601 if (array.not_persistent == 0 || tst->ss->external) {
602
603 /* need to find a sample superblock to copy, and
604 * a spare slot to use.
605 * For 'external' array (well, container based),
606 * We can just load the metadata for the array.
607 */
608 if (tst->sb)
609 /* already loaded */;
610 else if (tst->ss->external) {
611 tst->ss->load_super(tst, fd, NULL);
612 } else for (j = 0; j < tst->max_devs; j++) {
613 char *dev;
614 int dfd;
615 disc.number = j;
616 if (ioctl(fd, GET_DISK_INFO, &disc))
617 continue;
618 if (disc.major==0 && disc.minor==0)
619 continue;
620 if ((disc.state & 4)==0) continue; /* sync */
621 /* Looks like a good device to try */
622 dev = map_dev(disc.major, disc.minor, 1);
623 if (!dev) continue;
624 dfd = dev_open(dev, O_RDONLY);
625 if (dfd < 0) continue;
626 if (tst->ss->load_super(tst, dfd,
627 NULL)) {
628 close(dfd);
629 continue;
630 }
631 close(dfd);
632 break;
633 }
634 /* FIXME this is a bad test to be using */
635 if (!tst->sb) {
636 close(tfd);
637 fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
638 return 1;
639 }
640
641 /* Make sure device is large enough */
642 if (tst->ss->avail_size(tst, ldsize/512) <
643 array_size) {
644 close(tfd);
645 tfd = -1;
646 if (add_dev != dv->devname)
647 continue;
648 fprintf(stderr, Name ": %s not large enough to join array\n",
649 dv->devname);
650 return 1;
651 }
652
653 /* Possibly this device was recently part of the array
654 * and was temporarily removed, and is now being re-added.
655 * If so, we can simply re-add it.
656 */
657 tst->ss->uuid_from_super(tst, duuid);
658
659 /* re-add doesn't work for version-1 superblocks
660 * before 2.6.18 :-(
661 */
662 if (array.major_version == 1 &&
663 get_linux_version() <= 2006018)
664 ;
665 else if (st->sb) {
666 struct mdinfo mdi;
667 st->ss->getinfo_super(st, &mdi);
668 st->ss->uuid_from_super(st, ouuid);
669 if ((mdi.disk.state & (1<<MD_DISK_ACTIVE)) &&
670 !(mdi.disk.state & (1<<MD_DISK_FAULTY)) &&
671 memcmp(duuid, ouuid, sizeof(ouuid))==0) {
672 /* look like it is worth a try. Need to
673 * make sure kernel will accept it though.
674 */
675 disc.number = mdi.disk.number;
676 if (ioctl(fd, GET_DISK_INFO, &disc) != 0
677 || disc.major != 0 || disc.minor != 0
678 || !enough_fd(fd))
679 goto skip_re_add;
680 disc.major = major(stb.st_rdev);
681 disc.minor = minor(stb.st_rdev);
682 disc.number = mdi.disk.number;
683 disc.raid_disk = mdi.disk.raid_disk;
684 disc.state = mdi.disk.state;
685 if (dv->writemostly == 1)
686 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
687 if (dv->writemostly == 2)
688 disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
689 remove_partitions(tfd);
690 close(tfd);
691 tfd = -1;
692 /* don't even try if disk is marked as faulty */
693 errno = 0;
694 if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
695 if (verbose >= 0)
696 fprintf(stderr, Name ": re-added %s\n", add_dev);
697 count++;
698 continue;
699 }
700 if (errno == ENOMEM || errno == EROFS) {
701 fprintf(stderr, Name ": add new device failed for %s: %s\n",
702 add_dev, strerror(errno));
703 if (add_dev != dv->devname)
704 continue;
705 return 1;
706 }
707 skip_re_add:
708 re_add_failed = 1;
709 }
710 }
711 if (add_dev != dv->devname) {
712 if (verbose > 0)
713 fprintf(stderr, Name
714 ": --re-add for %s to %s is not possible\n",
715 add_dev, devname);
716 if (tfd >= 0) {
717 close(tfd);
718 tfd = -1;
719 }
720 continue;
721 }
722 if (dv->re_add) {
723 if (tfd >= 0)
724 close(tfd);
725 fprintf(stderr, Name
726 ": --re-add for %s to %s is not possible\n",
727 dv->devname, devname);
728 return 1;
729 }
730 if (re_add_failed) {
731 fprintf(stderr, Name ": %s reports being an active member for %s, but a --re-add fails.\n",
732 dv->devname, devname);
733 fprintf(stderr, Name ": not performing --add as that would convert %s in to a spare.\n",
734 dv->devname);
735 fprintf(stderr, Name ": To make this a spare, use \"mdadm --zero-superblock %s\" first.\n",
736 dv->devname);
737 if (tfd >= 0)
738 close(tfd);
739 return 1;
740 }
741 } else {
742 /* non-persistent. Must ensure that new drive
743 * is at least array.size big.
744 */
745 if (ldsize/512 < array_size) {
746 fprintf(stderr, Name ": %s not large enough to join array\n",
747 dv->devname);
748 if (tfd >= 0)
749 close(tfd);
750 return 1;
751 }
752 }
753 /* committed to really trying this device now*/
754 if (tfd >= 0) {
755 remove_partitions(tfd);
756 close(tfd);
757 tfd = -1;
758 }
759 /* in 2.6.17 and earlier, version-1 superblocks won't
760 * use the number we write, but will choose a free number.
761 * we must choose the same free number, which requires
762 * starting at 'raid_disks' and counting up
763 */
764 for (j = array.raid_disks; j< tst->max_devs; j++) {
765 disc.number = j;
766 if (ioctl(fd, GET_DISK_INFO, &disc))
767 break;
768 if (disc.major==0 && disc.minor==0)
769 break;
770 if (disc.state & 8) /* removed */
771 break;
772 }
773 disc.major = major(stb.st_rdev);
774 disc.minor = minor(stb.st_rdev);
775 disc.number =j;
776 disc.state = 0;
777 if (array.not_persistent==0) {
778 int dfd;
779 if (dv->writemostly == 1)
780 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
781 dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
782 if (tst->ss->add_to_super(tst, &disc, dfd,
783 dv->devname)) {
784 close(dfd);
785 return 1;
786 }
787 /* write_init_super will close 'dfd' */
788 if (tst->ss->write_init_super(tst))
789 return 1;
790 } else if (dv->re_add) {
791 /* this had better be raid1.
792 * As we are "--re-add"ing we must find a spare slot
793 * to fill.
794 */
795 char *used = malloc(array.raid_disks);
796 memset(used, 0, array.raid_disks);
797 for (j=0; j< tst->max_devs; j++) {
798 mdu_disk_info_t disc2;
799 disc2.number = j;
800 if (ioctl(fd, GET_DISK_INFO, &disc2))
801 continue;
802 if (disc2.major==0 && disc2.minor==0)
803 continue;
804 if (disc2.state & 8) /* removed */
805 continue;
806 if (disc2.raid_disk < 0)
807 continue;
808 if (disc2.raid_disk > array.raid_disks)
809 continue;
810 used[disc2.raid_disk] = 1;
811 }
812 for (j=0 ; j<array.raid_disks; j++)
813 if (!used[j]) {
814 disc.raid_disk = j;
815 disc.state |= (1<<MD_DISK_SYNC);
816 break;
817 }
818 free(used);
819 }
820 if (dv->writemostly == 1)
821 disc.state |= (1 << MD_DISK_WRITEMOSTLY);
822 if (tst->ss->external) {
823 /* add a disk to an external metadata container
824 * only if mdmon is around to see it
825 */
826 struct mdinfo new_mdi;
827 struct mdinfo *sra;
828 int container_fd;
829 int devnum = fd2devnum(fd);
830 int dfd;
831
832 container_fd = open_dev_excl(devnum);
833 if (container_fd < 0) {
834 fprintf(stderr, Name ": add failed for %s:"
835 " could not get exclusive access to container\n",
836 dv->devname);
837 return 1;
838 }
839
840 if (!mdmon_running(devnum)) {
841 fprintf(stderr, Name ": add failed for %s: mdmon not running\n",
842 dv->devname);
843 close(container_fd);
844 return 1;
845 }
846
847 dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
848 if (tst->ss->add_to_super(tst, &disc, dfd,
849 dv->devname)) {
850 close(dfd);
851 close(container_fd);
852 return 1;
853 }
854 close(dfd);
855
856 sra = sysfs_read(container_fd, -1, 0);
857 if (!sra) {
858 fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n",
859 dv->devname);
860 close(container_fd);
861 return 1;
862 }
863 sra->array.level = LEVEL_CONTAINER;
864 /* Need to set data_offset and component_size */
865 tst->ss->getinfo_super(tst, &new_mdi);
866 new_mdi.disk.major = disc.major;
867 new_mdi.disk.minor = disc.minor;
868 new_mdi.recovery_start = 0;
869 if (sysfs_add_disk(sra, &new_mdi, 0) != 0) {
870 fprintf(stderr, Name ": add new device to external metadata"
871 " failed for %s\n", dv->devname);
872 close(container_fd);
873 return 1;
874 }
875 ping_monitor(devnum2devname(devnum));
876 sysfs_free(sra);
877 close(container_fd);
878 } else if (ioctl(fd, ADD_NEW_DISK, &disc)) {
879 fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
880 dv->devname, j, strerror(errno));
881 return 1;
882 }
883 if (verbose >= 0)
884 fprintf(stderr, Name ": added %s\n", dv->devname);
885 break;
886
887 case 'r':
888 /* hot remove */
889 if (tst->subarray[0]) {
890 fprintf(stderr, Name ": Cannot remove disks from a"
891 " \'member\' array, perform this"
892 " operation on the parent container\n");
893 if (sysfd >= 0)
894 close(sysfd);
895 return 1;
896 }
897 if (tst->ss->external) {
898 /* To remove a device from a container, we must
899 * check that it isn't in use in an array.
900 * This involves looking in the 'holders'
901 * directory - there must be just one entry,
902 * the container.
903 * To ensure that it doesn't get used as a
904 * hold spare while we are checking, we
905 * get an O_EXCL open on the container
906 */
907 int dnum = fd2devnum(fd);
908 lfd = open_dev_excl(dnum);
909 if (lfd < 0) {
910 fprintf(stderr, Name
911 ": Cannot get exclusive access "
912 " to container - odd\n");
913 if (sysfd >= 0)
914 close(sysfd);
915 return 1;
916 }
917 /* in the detached case it is not possible to
918 * check if we are the unique holder, so just
919 * rely on the 'detached' checks
920 */
921 if (strcmp(dv->devname, "detached") == 0 ||
922 sysfd >= 0 ||
923 sysfs_unique_holder(dnum, stb.st_rdev))
924 /* pass */;
925 else {
926 fprintf(stderr, Name
927 ": %s is %s, cannot remove.\n",
928 dnprintable,
929 errno == EEXIST ? "still in use":
930 "not a member");
931 close(lfd);
932 return 1;
933 }
934 }
935 /* FIXME check that it is a current member */
936 if (sysfd >= 0) {
937 /* device has been removed and we don't know
938 * the major:minor number
939 */
940 int n = write(sysfd, "remove", 6);
941 if (n != 6)
942 err = -1;
943 else
944 err = 0;
945 close(sysfd);
946 sysfd = -1;
947 } else {
948 err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev);
949 if (err && errno == ENODEV) {
950 /* Old kernels rejected this if no personality
951 * registered */
952 struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS);
953 struct mdinfo *dv = NULL;
954 if (sra)
955 dv = sra->devs;
956 for ( ; dv ; dv=dv->next)
957 if (dv->disk.major == (int)major(stb.st_rdev) &&
958 dv->disk.minor == (int)minor(stb.st_rdev))
959 break;
960 if (dv)
961 err = sysfs_set_str(sra, dv,
962 "state", "remove");
963 else
964 err = -1;
965 if (sra)
966 sysfs_free(sra);
967 }
968 }
969 if (err) {
970 fprintf(stderr, Name ": hot remove failed "
971 "for %s: %s\n", dnprintable,
972 strerror(errno));
973 if (lfd >= 0)
974 close(lfd);
975 return 1;
976 }
977 if (tst->ss->external) {
978 /*
979 * Before dropping our exclusive open we make an
980 * attempt at preventing mdmon from seeing an
981 * 'add' event before reconciling this 'remove'
982 * event.
983 */
984 char *name = devnum2devname(fd2devnum(fd));
985
986 if (!name) {
987 fprintf(stderr, Name ": unable to get container name\n");
988 return 1;
989 }
990
991 ping_manager(name);
992 free(name);
993 }
994 if (lfd >= 0)
995 close(lfd);
996 count++;
997 if (verbose >= 0)
998 fprintf(stderr, Name ": hot removed %s from %s\n",
999 dnprintable, devname);
1000 break;
1001
1002 case 'f': /* set faulty */
1003 /* FIXME check current member */
1004 if ((sysfd >= 0 && write(sysfd, "faulty", 6) != 6) ||
1005 (sysfd < 0 && ioctl(fd, SET_DISK_FAULTY,
1006 (unsigned long) stb.st_rdev))) {
1007 fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
1008 dnprintable, strerror(errno));
1009 if (sysfd >= 0)
1010 close(sysfd);
1011 return 1;
1012 }
1013 if (sysfd >= 0)
1014 close(sysfd);
1015 sysfd = -1;
1016 count++;
1017 if (verbose >= 0)
1018 fprintf(stderr, Name ": set %s faulty in %s\n",
1019 dnprintable, devname);
1020 break;
1021 }
1022 }
1023 if (test && count == 0)
1024 return 2;
1025 return 0;
1026 }
1027
1028 int autodetect(void)
1029 {
1030 /* Open any md device, and issue the RAID_AUTORUN ioctl */
1031 int rv = 1;
1032 int fd = dev_open("9:0", O_RDONLY);
1033 if (fd >= 0) {
1034 if (ioctl(fd, RAID_AUTORUN, 0) == 0)
1035 rv = 0;
1036 close(fd);
1037 }
1038 return rv;
1039 }
1040
1041 int Update_subarray(char *dev, char *subarray, char *update, mddev_ident_t ident, int quiet)
1042 {
1043 struct supertype supertype, *st = &supertype;
1044 int fd, rv = 2;
1045
1046 memset(st, 0, sizeof(*st));
1047 if (snprintf(st->subarray, sizeof(st->subarray), "%s", subarray) >=
1048 (signed)sizeof(st->subarray)) {
1049 if (!quiet)
1050 fprintf(stderr,
1051 Name ": Input overflow for subarray '%s' > %zu bytes\n",
1052 subarray, sizeof(st->subarray) - 1);
1053 return 2;
1054 }
1055
1056 fd = open_subarray(dev, st, quiet);
1057 if (fd < 0)
1058 return 2;
1059
1060 if (!st->ss->update_subarray) {
1061 if (!quiet)
1062 fprintf(stderr,
1063 Name ": Operation not supported for %s metadata\n",
1064 st->ss->name);
1065 goto free_super;
1066 }
1067
1068 if (mdmon_running(st->devnum))
1069 st->update_tail = &st->updates;
1070
1071 rv = st->ss->update_subarray(st, update, ident);
1072
1073 if (rv) {
1074 if (!quiet)
1075 fprintf(stderr, Name ": Failed to update %s of subarray-%s in %s\n",
1076 update, subarray, dev);
1077 } else if (st->update_tail)
1078 flush_metadata_updates(st);
1079 else
1080 st->ss->sync_metadata(st);
1081
1082 if (rv == 0 && strcmp(update, "name") == 0 && !quiet)
1083 fprintf(stderr,
1084 Name ": Updated subarray-%s name from %s, UUIDs may have changed\n",
1085 subarray, dev);
1086
1087 free_super:
1088 st->ss->free_super(st);
1089 close(fd);
1090
1091 return rv;
1092 }
1093 #endif
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