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Fix regression with removing 'failed' and 'detached' devices.
[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
387 next = dv->next;
388 jnext = 0;
389
390 if (strcmp(dv->devname, "failed")==0 ||
391 strcmp(dv->devname, "faulty")==0) {
392 if (dv->disposition != 'r') {
393 fprintf(stderr, Name ": %s only meaningful "
394 "with -r, not -%c\n",
395 dv->devname, dv->disposition);
396 return 1;
397 }
398 for (; j < array.raid_disks + array.nr_disks ; j++) {
399 unsigned dev;
400 disc.number = j;
401 if (ioctl(fd, GET_DISK_INFO, &disc))
402 continue;
403 if (disc.major == 0 && disc.minor == 0)
404 continue;
405 if ((disc.state & 1) == 0) /* faulty */
406 continue;
407 dev = makedev(disc.major, disc.minor);
408 if (stb.st_rdev == dev)
409 /* already did that one */
410 continue;
411 stb.st_rdev = dev;
412 next = dv;
413 /* same slot again next time - things might
414 * have reshuffled */
415 jnext = j;
416 sprintf(dvname,"%d:%d", disc.major, disc.minor);
417 dnprintable = dvname;
418 break;
419 }
420 if (next != dv)
421 continue;
422 } else if (strcmp(dv->devname, "detached") == 0) {
423 if (dv->disposition != 'r' && dv->disposition != 'f') {
424 fprintf(stderr, Name ": %s only meaningful "
425 "with -r of -f, not -%c\n",
426 dv->devname, dv->disposition);
427 return 1;
428 }
429 for (; j < array.raid_disks + array.nr_disks; j++) {
430 int sfd;
431 unsigned dev;
432 disc.number = j;
433 if (ioctl(fd, GET_DISK_INFO, &disc))
434 continue;
435 if (disc.major == 0 && disc.minor == 0)
436 continue;
437 sprintf(dvname,"%d:%d", disc.major, disc.minor);
438 sfd = dev_open(dvname, O_RDONLY);
439 if (sfd >= 0) {
440 close(sfd);
441 continue;
442 }
443 if (dv->disposition == 'f' &&
444 (disc.state & 1) == 1) /* already faulty */
445 continue;
446 if (errno != ENXIO)
447 continue;
448 dev = makedev(disc.major, disc.minor);
449 if (stb.st_rdev == dev)
450 /* already did that one */
451 continue;
452 stb.st_rdev = dev;
453 next = dv;
454 /* same slot again next time - things might
455 * have reshuffled */
456 jnext = j;
457 dnprintable = dvname;
458 break;
459 }
460 if (next != dv)
461 continue;
462 } else if (strcmp(dv->devname, "missing") == 0) {
463 if (dv->disposition != 'a' || dv->re_add == 0) {
464 fprintf(stderr, Name ": 'missing' only meaningful "
465 "with --re-add\n");
466 return 1;
467 }
468 if (add_devlist == NULL)
469 add_devlist = conf_get_devs();
470 if (add_devlist == NULL) {
471 fprintf(stderr, Name ": no devices to scan for missing members.");
472 continue;
473 }
474 add_dev = add_devlist->devname;
475 add_devlist = add_devlist->next;
476 if (add_devlist != NULL)
477 next = dv;
478 if (stat(add_dev, &stb) < 0)
479 continue;
480 } else if (strchr(dv->devname, '/') == NULL &&
481 strchr(dv->devname, ':') == NULL &&
482 strlen(dv->devname) < 50) {
483 /* Assume this is a kernel-internal name like 'sda1' */
484 int found = 0;
485 char dname[55];
486 if (dv->disposition != 'r' && dv->disposition != 'f') {
487 fprintf(stderr, Name ": %s only meaningful "
488 "with -r or -f, not -%c\n",
489 dv->devname, dv->disposition);
490 return 1;
491 }
492
493 sprintf(dname, "dev-%s", dv->devname);
494 sysfd = sysfs_open(fd2devnum(fd), dname, "block/dev");
495 if (sysfd >= 0) {
496 char dn[20];
497 int mj,mn;
498 if (sysfs_fd_get_str(sysfd, dn, 20) > 0 &&
499 sscanf(dn, "%d:%d", &mj,&mn) == 2) {
500 stb.st_rdev = makedev(mj,mn);
501 found = 1;
502 }
503 close(sysfd);
504 sysfd = -1;
505 }
506 if (!found) {
507 sysfd = sysfs_open(fd2devnum(fd), dname, "state");
508 if (sysfd < 0) {
509 fprintf(stderr, Name ": %s does not appear "
510 "to be a component of %s\n",
511 dv->devname, devname);
512 return 1;
513 }
514 }
515 } else {
516 j = 0;
517
518 tfd = dev_open(dv->devname, O_RDONLY);
519 if (tfd < 0 && dv->disposition == 'r' &&
520 lstat(dv->devname, &stb) == 0)
521 /* Be happy, the lstat worked, that is
522 * enough for --remove
523 */
524 ;
525 else {
526 if (tfd < 0 || fstat(tfd, &stb) != 0) {
527 fprintf(stderr, Name ": cannot find %s: %s\n",
528 dv->devname, strerror(errno));
529 if (tfd >= 0)
530 close(tfd);
531 return 1;
532 }
533 close(tfd);
534 tfd = -1;
535 }
536 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
537 fprintf(stderr, Name ": %s is not a "
538 "block device.\n",
539 dv->devname);
540 return 1;
541 }
542 }
543 switch(dv->disposition){
544 default:
545 fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
546 dv->devname, dv->disposition);
547 return 1;
548 case 'a':
549 /* add the device */
550 if (tst->subarray[0]) {
551 fprintf(stderr, Name ": Cannot add disks to a"
552 " \'member\' array, perform this"
553 " operation on the parent container\n");
554 return 1;
555 }
556 /* Make sure it isn't in use (in 2.6 or later) */
557 tfd = dev_open(add_dev, O_RDONLY|O_EXCL|O_DIRECT);
558 if (tfd < 0 && add_dev != dv->devname)
559 continue;
560 if (tfd < 0) {
561 fprintf(stderr, Name ": Cannot open %s: %s\n",
562 dv->devname, strerror(errno));
563 return 1;
564 }
565
566 st = dup_super(tst);
567
568 if (array.not_persistent==0)
569 st->ss->load_super(st, tfd, NULL);
570
571 if (add_dev == dv->devname) {
572 if (!get_dev_size(tfd, dv->devname, &ldsize)) {
573 close(tfd);
574 return 1;
575 }
576 } else if (!get_dev_size(tfd, NULL, &ldsize)) {
577 close(tfd);
578 tfd = -1;
579 continue;
580 }
581
582 if (!tst->ss->external &&
583 array.major_version == 0 &&
584 md_get_version(fd)%100 < 2) {
585 close(tfd);
586 tfd = -1;
587 if (ioctl(fd, HOT_ADD_DISK,
588 (unsigned long)stb.st_rdev)==0) {
589 if (verbose >= 0)
590 fprintf(stderr, Name ": hot added %s\n",
591 add_dev);
592 continue;
593 }
594
595 fprintf(stderr, Name ": hot add failed for %s: %s\n",
596 add_dev, strerror(errno));
597 return 1;
598 }
599
600 if (array.not_persistent == 0 || tst->ss->external) {
601
602 /* need to find a sample superblock to copy, and
603 * a spare slot to use.
604 * For 'external' array (well, container based),
605 * We can just load the metadata for the array.
606 */
607 if (tst->sb)
608 /* already loaded */;
609 else if (tst->ss->external) {
610 tst->ss->load_super(tst, fd, NULL);
611 } else for (j = 0; j < tst->max_devs; j++) {
612 char *dev;
613 int dfd;
614 disc.number = j;
615 if (ioctl(fd, GET_DISK_INFO, &disc))
616 continue;
617 if (disc.major==0 && disc.minor==0)
618 continue;
619 if ((disc.state & 4)==0) continue; /* sync */
620 /* Looks like a good device to try */
621 dev = map_dev(disc.major, disc.minor, 1);
622 if (!dev) continue;
623 dfd = dev_open(dev, O_RDONLY);
624 if (dfd < 0) continue;
625 if (tst->ss->load_super(tst, dfd,
626 NULL)) {
627 close(dfd);
628 continue;
629 }
630 close(dfd);
631 break;
632 }
633 /* FIXME this is a bad test to be using */
634 if (!tst->sb) {
635 close(tfd);
636 fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
637 return 1;
638 }
639
640 /* Make sure device is large enough */
641 if (tst->ss->avail_size(tst, ldsize/512) <
642 array_size) {
643 close(tfd);
644 tfd = -1;
645 if (add_dev != dv->devname)
646 continue;
647 fprintf(stderr, Name ": %s not large enough to join array\n",
648 dv->devname);
649 return 1;
650 }
651
652 /* Possibly this device was recently part of the array
653 * and was temporarily removed, and is now being re-added.
654 * If so, we can simply re-add it.
655 */
656 tst->ss->uuid_from_super(tst, duuid);
657
658 /* re-add doesn't work for version-1 superblocks
659 * before 2.6.18 :-(
660 */
661 if (array.major_version == 1 &&
662 get_linux_version() <= 2006018)
663 ;
664 else if (st->sb) {
665 st->ss->uuid_from_super(st, ouuid);
666 if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
667 /* looks close enough for now. Kernel
668 * will worry about whether a bitmap
669 * based reconstruction is possible.
670 */
671 struct mdinfo mdi;
672 st->ss->getinfo_super(st, &mdi);
673 disc.major = major(stb.st_rdev);
674 disc.minor = minor(stb.st_rdev);
675 disc.number = mdi.disk.number;
676 disc.raid_disk = mdi.disk.raid_disk;
677 disc.state = mdi.disk.state;
678 if (dv->writemostly == 1)
679 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
680 if (dv->writemostly == 2)
681 disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
682 remove_partitions(tfd);
683 close(tfd);
684 tfd = -1;
685 /* don't even try if disk is marked as faulty */
686 errno = 0;
687 if ((disc.state & 1) == 0 &&
688 ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
689 if (verbose >= 0)
690 fprintf(stderr, Name ": re-added %s\n", add_dev);
691 count++;
692 continue;
693 }
694 if (errno == ENOMEM || errno == EROFS) {
695 fprintf(stderr, Name ": add new device failed for %s: %s\n",
696 add_dev, strerror(errno));
697 if (add_dev != dv->devname)
698 continue;
699 return 1;
700 }
701 /* fall back on normal-add */
702 }
703 }
704 if (add_dev != dv->devname) {
705 if (verbose > 0)
706 fprintf(stderr, Name
707 ": --re-add for %s to %s is not possible\n",
708 add_dev, devname);
709 if (tfd >= 0) {
710 close(tfd);
711 tfd = -1;
712 }
713 continue;
714 }
715 if (dv->re_add) {
716 if (tfd >= 0)
717 close(tfd);
718 fprintf(stderr, Name
719 ": --re-add for %s to %s is not possible\n",
720 dv->devname, devname);
721 return 1;
722 }
723 } else {
724 /* non-persistent. Must ensure that new drive
725 * is at least array.size big.
726 */
727 if (ldsize/512 < array_size) {
728 fprintf(stderr, Name ": %s not large enough to join array\n",
729 dv->devname);
730 if (tfd >= 0)
731 close(tfd);
732 return 1;
733 }
734 }
735 /* committed to really trying this device now*/
736 if (tfd >= 0) {
737 remove_partitions(tfd);
738 close(tfd);
739 tfd = -1;
740 }
741 /* in 2.6.17 and earlier, version-1 superblocks won't
742 * use the number we write, but will choose a free number.
743 * we must choose the same free number, which requires
744 * starting at 'raid_disks' and counting up
745 */
746 for (j = array.raid_disks; j< tst->max_devs; j++) {
747 disc.number = j;
748 if (ioctl(fd, GET_DISK_INFO, &disc))
749 break;
750 if (disc.major==0 && disc.minor==0)
751 break;
752 if (disc.state & 8) /* removed */
753 break;
754 }
755 disc.major = major(stb.st_rdev);
756 disc.minor = minor(stb.st_rdev);
757 disc.number =j;
758 disc.state = 0;
759 if (array.not_persistent==0 || tst->ss->external) {
760 int dfd;
761 if (dv->writemostly == 1)
762 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
763 dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
764 if (tst->ss->add_to_super(tst, &disc, dfd,
765 dv->devname)) {
766 close(dfd);
767 return 1;
768 }
769 /* write_init_super will close 'dfd' */
770 if (tst->ss->external)
771 /* mdmon will write the metadata */
772 close(dfd);
773 else if (tst->ss->write_init_super(tst))
774 return 1;
775 } else if (dv->re_add) {
776 /* this had better be raid1.
777 * As we are "--re-add"ing we must find a spare slot
778 * to fill.
779 */
780 char *used = malloc(array.raid_disks);
781 memset(used, 0, array.raid_disks);
782 for (j=0; j< tst->max_devs; j++) {
783 mdu_disk_info_t disc2;
784 disc2.number = j;
785 if (ioctl(fd, GET_DISK_INFO, &disc2))
786 continue;
787 if (disc2.major==0 && disc2.minor==0)
788 continue;
789 if (disc2.state & 8) /* removed */
790 continue;
791 if (disc2.raid_disk < 0)
792 continue;
793 if (disc2.raid_disk > array.raid_disks)
794 continue;
795 used[disc2.raid_disk] = 1;
796 }
797 for (j=0 ; j<array.raid_disks; j++)
798 if (!used[j]) {
799 disc.raid_disk = j;
800 disc.state |= (1<<MD_DISK_SYNC);
801 break;
802 }
803 free(used);
804 }
805 if (dv->writemostly == 1)
806 disc.state |= (1 << MD_DISK_WRITEMOSTLY);
807 if (tst->ss->external) {
808 /* add a disk to an external metadata container
809 * only if mdmon is around to see it
810 */
811 struct mdinfo new_mdi;
812 struct mdinfo *sra;
813 int container_fd;
814 int devnum = fd2devnum(fd);
815
816 container_fd = open_dev_excl(devnum);
817 if (container_fd < 0) {
818 fprintf(stderr, Name ": add failed for %s:"
819 " could not get exclusive access to container\n",
820 dv->devname);
821 return 1;
822 }
823
824 if (!mdmon_running(devnum)) {
825 fprintf(stderr, Name ": add failed for %s: mdmon not running\n",
826 dv->devname);
827 close(container_fd);
828 return 1;
829 }
830
831 sra = sysfs_read(container_fd, -1, 0);
832 if (!sra) {
833 fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n",
834 dv->devname);
835 close(container_fd);
836 return 1;
837 }
838 sra->array.level = LEVEL_CONTAINER;
839 /* Need to set data_offset and component_size */
840 tst->ss->getinfo_super(tst, &new_mdi);
841 new_mdi.disk.major = disc.major;
842 new_mdi.disk.minor = disc.minor;
843 new_mdi.recovery_start = 0;
844 if (sysfs_add_disk(sra, &new_mdi, 0) != 0) {
845 fprintf(stderr, Name ": add new device to external metadata"
846 " failed for %s\n", dv->devname);
847 close(container_fd);
848 return 1;
849 }
850 ping_monitor(devnum2devname(devnum));
851 sysfs_free(sra);
852 close(container_fd);
853 } else if (ioctl(fd, ADD_NEW_DISK, &disc)) {
854 fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
855 dv->devname, j, strerror(errno));
856 return 1;
857 }
858 if (verbose >= 0)
859 fprintf(stderr, Name ": added %s\n", dv->devname);
860 break;
861
862 case 'r':
863 /* hot remove */
864 if (tst->subarray[0]) {
865 fprintf(stderr, Name ": Cannot remove disks from a"
866 " \'member\' array, perform this"
867 " operation on the parent container\n");
868 if (sysfd >= 0)
869 close(sysfd);
870 return 1;
871 }
872 if (tst->ss->external) {
873 /* To remove a device from a container, we must
874 * check that it isn't in use in an array.
875 * This involves looking in the 'holders'
876 * directory - there must be just one entry,
877 * the container.
878 * To ensure that it doesn't get used as a
879 * hold spare while we are checking, we
880 * get an O_EXCL open on the container
881 */
882 int dnum = fd2devnum(fd);
883 lfd = open_dev_excl(dnum);
884 if (lfd < 0) {
885 fprintf(stderr, Name
886 ": Cannot get exclusive access "
887 " to container - odd\n");
888 if (sysfd >= 0)
889 close(sysfd);
890 return 1;
891 }
892 /* in the detached case it is not possible to
893 * check if we are the unique holder, so just
894 * rely on the 'detached' checks
895 */
896 if (strcmp(dv->devname, "detached") == 0 ||
897 sysfd >= 0 ||
898 sysfs_unique_holder(dnum, stb.st_rdev))
899 /* pass */;
900 else {
901 fprintf(stderr, Name
902 ": %s is %s, cannot remove.\n",
903 dnprintable,
904 errno == EEXIST ? "still in use":
905 "not a member");
906 close(lfd);
907 return 1;
908 }
909 }
910 /* FIXME check that it is a current member */
911 if (sysfd >= 0) {
912 /* device has been removed and we don't know
913 * the major:minor number
914 */
915 int n = write(sysfd, "remove", 6);
916 if (n != 6)
917 err = -1;
918 else
919 err = 0;
920 close(sysfd);
921 sysfd = -1;
922 } else {
923 err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev);
924 if (err && errno == ENODEV) {
925 /* Old kernels rejected this if no personality
926 * registered */
927 struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS);
928 struct mdinfo *dv = NULL;
929 if (sra)
930 dv = sra->devs;
931 for ( ; dv ; dv=dv->next)
932 if (dv->disk.major == (int)major(stb.st_rdev) &&
933 dv->disk.minor == (int)minor(stb.st_rdev))
934 break;
935 if (dv)
936 err = sysfs_set_str(sra, dv,
937 "state", "remove");
938 else
939 err = -1;
940 if (sra)
941 sysfs_free(sra);
942 }
943 }
944 if (err) {
945 fprintf(stderr, Name ": hot remove failed "
946 "for %s: %s\n", dnprintable,
947 strerror(errno));
948 if (lfd >= 0)
949 close(lfd);
950 return 1;
951 }
952 if (tst->ss->external) {
953 /*
954 * Before dropping our exclusive open we make an
955 * attempt at preventing mdmon from seeing an
956 * 'add' event before reconciling this 'remove'
957 * event.
958 */
959 char *name = devnum2devname(fd2devnum(fd));
960
961 if (!name) {
962 fprintf(stderr, Name ": unable to get container name\n");
963 return 1;
964 }
965
966 ping_manager(name);
967 free(name);
968 }
969 if (lfd >= 0)
970 close(lfd);
971 count++;
972 if (verbose >= 0)
973 fprintf(stderr, Name ": hot removed %s from %s\n",
974 dnprintable, devname);
975 break;
976
977 case 'f': /* set faulty */
978 /* FIXME check current member */
979 if ((sysfd >= 0 && write(sysfd, "faulty", 6) != 6) ||
980 (sysfd < 0 && ioctl(fd, SET_DISK_FAULTY,
981 (unsigned long) stb.st_rdev))) {
982 fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
983 dnprintable, strerror(errno));
984 if (sysfd >= 0)
985 close(sysfd);
986 return 1;
987 }
988 if (sysfd >= 0)
989 close(sysfd);
990 sysfd = -1;
991 count++;
992 if (verbose >= 0)
993 fprintf(stderr, Name ": set %s faulty in %s\n",
994 dnprintable, devname);
995 break;
996 }
997 }
998 if (test && count == 0)
999 return 2;
1000 return 0;
1001 }
1002
1003 int autodetect(void)
1004 {
1005 /* Open any md device, and issue the RAID_AUTORUN ioctl */
1006 int rv = 1;
1007 int fd = dev_open("9:0", O_RDONLY);
1008 if (fd >= 0) {
1009 if (ioctl(fd, RAID_AUTORUN, 0) == 0)
1010 rv = 0;
1011 close(fd);
1012 }
1013 return rv;
1014 }
1015
1016 int Update_subarray(char *dev, char *subarray, char *update, mddev_ident_t ident, int quiet)
1017 {
1018 struct supertype supertype, *st = &supertype;
1019 int fd, rv = 2;
1020
1021 memset(st, 0, sizeof(*st));
1022 if (snprintf(st->subarray, sizeof(st->subarray), "%s", subarray) >=
1023 (signed)sizeof(st->subarray)) {
1024 if (!quiet)
1025 fprintf(stderr,
1026 Name ": Input overflow for subarray '%s' > %zu bytes\n",
1027 subarray, sizeof(st->subarray) - 1);
1028 return 2;
1029 }
1030
1031 fd = open_subarray(dev, st, quiet);
1032 if (fd < 0)
1033 return 2;
1034
1035 if (!st->ss->update_subarray) {
1036 if (!quiet)
1037 fprintf(stderr,
1038 Name ": Operation not supported for %s metadata\n",
1039 st->ss->name);
1040 goto free_super;
1041 }
1042
1043 if (mdmon_running(st->devnum))
1044 st->update_tail = &st->updates;
1045
1046 rv = st->ss->update_subarray(st, update, ident);
1047
1048 if (rv) {
1049 if (!quiet)
1050 fprintf(stderr, Name ": Failed to update %s of subarray-%s in %s\n",
1051 update, subarray, dev);
1052 } else if (st->update_tail)
1053 flush_metadata_updates(st);
1054 else
1055 st->ss->sync_metadata(st);
1056
1057 if (rv == 0 && strcmp(update, "name") == 0 && !quiet)
1058 fprintf(stderr,
1059 Name ": Updated subarray-%s name from %s, UUIDs may have changed\n",
1060 subarray, dev);
1061
1062 free_super:
1063 st->ss->free_super(st);
1064 close(fd);
1065
1066 return rv;
1067 }
1068 #endif
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