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[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 /* Remove all 'standard' devices for 'devnum', including
122 * partitions. Also remove names at 'path' - possibly with
123 * partition suffixes - which link to those names.
124 */
125 char base[40];
126 char *path2;
127 char link[1024];
128 int n;
129 int part;
130 char *be;
131 char *pe;
132
133 if (devnum >= 0)
134 sprintf(base, "/dev/md%d", devnum);
135 else
136 sprintf(base, "/dev/md_d%d", -1-devnum);
137 be = base + strlen(base);
138 if (path) {
139 path2 = malloc(strlen(path)+20);
140 strcpy(path2, path);
141 pe = path2 + strlen(path2);
142 } else
143 path2 = path = NULL;
144
145 for (part = 0; part < 16; part++) {
146 if (part) {
147 sprintf(be, "p%d", part);
148 if (path) {
149 if (isdigit(pe[-1]))
150 sprintf(pe, "p%d", part);
151 else
152 sprintf(pe, "%d", part);
153 }
154 }
155 /* FIXME test if really is md device ?? */
156 unlink(base);
157 if (path) {
158 n = readlink(path2, link, sizeof(link));
159 if (n && strlen(base) == n &&
160 strncmp(link, base, n) == 0)
161 unlink(path2);
162 }
163 }
164 free(path2);
165 }
166
167
168 int Manage_runstop(char *devname, int fd, int runstop, int quiet)
169 {
170 /* Run or stop the array. array must already be configured
171 * required >= 0.90.0
172 * Only print failure messages if quiet == 0;
173 * quiet > 0 means really be quiet
174 * quiet < 0 means we will try again if it fails.
175 */
176 mdu_param_t param; /* unused */
177
178 if (runstop == -1 && md_get_version(fd) < 9000) {
179 if (ioctl(fd, STOP_MD, 0)) {
180 if (quiet == 0) fprintf(stderr,
181 Name ": stopping device %s "
182 "failed: %s\n",
183 devname, strerror(errno));
184 return 1;
185 }
186 }
187
188 if (md_get_version(fd) < 9000) {
189 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
190 return 1;
191 }
192 /*
193 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
194 fprintf(stderr, Name ": %s does not appear to be active.\n",
195 devname);
196 return 1;
197 }
198 */
199 if (runstop>0) {
200 if (ioctl(fd, RUN_ARRAY, &param)) {
201 fprintf(stderr, Name ": failed to run array %s: %s\n",
202 devname, strerror(errno));
203 return 1;
204 }
205 if (quiet <= 0)
206 fprintf(stderr, Name ": started %s\n", devname);
207 } else if (runstop < 0){
208 struct map_ent *map = NULL;
209 struct stat stb;
210 struct mdinfo *mdi;
211 int devnum;
212 /* If this is an mdmon managed array, just write 'inactive'
213 * to the array state and let mdmon clear up.
214 */
215 devnum = fd2devnum(fd);
216 mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
217 if (mdi &&
218 mdi->array.level > 0 &&
219 is_subarray(mdi->text_version)) {
220 /* This is mdmon managed. */
221 close(fd);
222 if (sysfs_set_str(mdi, NULL,
223 "array_state", "inactive") < 0) {
224 if (quiet == 0)
225 fprintf(stderr, Name
226 ": failed to stop array %s: %s\n",
227 devname, strerror(errno));
228 return 1;
229 }
230
231 /* Give monitor a chance to act */
232 ping_monitor(mdi->text_version);
233
234 fd = open(devname, O_RDONLY);
235 } else if (mdi &&
236 mdi->array.major_version == -1 &&
237 mdi->array.minor_version == -2 &&
238 !is_subarray(mdi->text_version)) {
239 struct mdstat_ent *mds, *m;
240 /* container, possibly mdmon-managed.
241 * Make sure mdmon isn't opening it, which
242 * would interfere with the 'stop'
243 */
244 ping_monitor(mdi->sys_name);
245
246 /* now check that there are no existing arrays
247 * which are members of this array
248 */
249 mds = mdstat_read(0, 0);
250 for (m=mds; m; m=m->next)
251 if (m->metadata_version &&
252 strncmp(m->metadata_version, "external:", 9)==0 &&
253 is_subarray(m->metadata_version+9) &&
254 devname2devnum(m->metadata_version+10) == devnum) {
255 if (!quiet)
256 fprintf(stderr, Name
257 ": Cannot stop container %s: "
258 "member %s still active\n",
259 devname, m->dev);
260 free_mdstat(mds);
261 if (mdi)
262 sysfs_free(mdi);
263 return 1;
264 }
265 }
266
267 if (fd >= 0 && ioctl(fd, STOP_ARRAY, NULL)) {
268 if (quiet == 0) {
269 fprintf(stderr, Name
270 ": failed to stop array %s: %s\n",
271 devname, strerror(errno));
272 if (errno == EBUSY)
273 fprintf(stderr, "Perhaps a running "
274 "process, mounted filesystem "
275 "or active volume group?\n");
276 }
277 if (mdi)
278 sysfs_free(mdi);
279 return 1;
280 }
281 /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
282 * was stopped, so We'll do it here just to be sure. Drop any
283 * partitions as well...
284 */
285 if (fd >= 0)
286 ioctl(fd, BLKRRPART, 0);
287 if (mdi)
288 sysfs_uevent(mdi, "change");
289
290
291 if (devnum != NoMdDev &&
292 (stat("/dev/.udev", &stb) != 0 ||
293 check_env("MDADM_NO_UDEV"))) {
294 struct map_ent *mp = map_by_devnum(&map, devnum);
295 remove_devices(devnum, mp ? mp->path : NULL);
296 }
297
298
299 if (quiet <= 0)
300 fprintf(stderr, Name ": stopped %s\n", devname);
301 if (devnum != NoMdDev) {
302 map_delete(&map, devnum);
303 map_write(map);
304 map_free(map);
305 }
306 }
307 return 0;
308 }
309
310 int Manage_resize(char *devname, int fd, long long size, int raid_disks)
311 {
312 mdu_array_info_t info;
313 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
314 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
315 devname, strerror(errno));
316 return 1;
317 }
318 if (size >= 0)
319 info.size = size;
320 if (raid_disks > 0)
321 info.raid_disks = raid_disks;
322 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
323 fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
324 devname, strerror(errno));
325 return 1;
326 }
327 return 0;
328 }
329
330 int Manage_subdevs(char *devname, int fd,
331 mddev_dev_t devlist, int verbose)
332 {
333 /* do something to each dev.
334 * devmode can be
335 * 'a' - add the device
336 * try HOT_ADD_DISK
337 * If that fails EINVAL, try ADD_NEW_DISK
338 * 'r' - remove the device HOT_REMOVE_DISK
339 * device can be 'faulty' or 'detached' in which case all
340 * matching devices are removed.
341 * 'f' - set the device faulty SET_DISK_FAULTY
342 * device can be 'detached' in which case any device that
343 * is inaccessible will be marked faulty.
344 */
345 mdu_array_info_t array;
346 mdu_disk_info_t disc;
347 unsigned long long array_size;
348 mddev_dev_t dv, next = NULL;
349 struct stat stb;
350 int j, jnext = 0;
351 int tfd;
352 struct supertype *st, *tst;
353 int duuid[4];
354 int ouuid[4];
355 int lfd = -1;
356
357 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
358 fprintf(stderr, Name ": cannot get array info for %s\n",
359 devname);
360 return 1;
361 }
362
363 /* array.size is only 32 bit and may be truncated.
364 * So read from sysfs if possible, and record number of sectors
365 */
366
367 array_size = get_component_size(fd);
368 if (array_size <= 0)
369 array_size = array.size * 2;
370
371 tst = super_by_fd(fd);
372 if (!tst) {
373 fprintf(stderr, Name ": unsupport array - version %d.%d\n",
374 array.major_version, array.minor_version);
375 return 1;
376 }
377
378 for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
379 unsigned long long ldsize;
380 char dvname[20];
381 char *dnprintable = dv->devname;
382 int err;
383
384 next = dv->next;
385 jnext = 0;
386
387 if (strcmp(dv->devname, "failed")==0 ||
388 strcmp(dv->devname, "faulty")==0) {
389 if (dv->disposition != 'r') {
390 fprintf(stderr, Name ": %s only meaningful "
391 "with -r, not -%c\n",
392 dv->devname, dv->disposition);
393 return 1;
394 }
395 for (; j < array.raid_disks + array.nr_disks ; j++) {
396 disc.number = j;
397 if (ioctl(fd, GET_DISK_INFO, &disc))
398 continue;
399 if (disc.major == 0 && disc.minor == 0)
400 continue;
401 if ((disc.state & 1) == 0) /* faulty */
402 continue;
403 stb.st_rdev = makedev(disc.major, disc.minor);
404 next = dv;
405 jnext = j+1;
406 sprintf(dvname,"%d:%d", disc.major, disc.minor);
407 dnprintable = dvname;
408 break;
409 }
410 if (jnext == 0)
411 continue;
412 } else if (strcmp(dv->devname, "detached") == 0) {
413 if (dv->disposition != 'r' && dv->disposition != 'f') {
414 fprintf(stderr, Name ": %s only meaningful "
415 "with -r of -f, not -%c\n",
416 dv->devname, dv->disposition);
417 return 1;
418 }
419 for (; j < array.raid_disks + array.nr_disks; j++) {
420 int sfd;
421 disc.number = j;
422 if (ioctl(fd, GET_DISK_INFO, &disc))
423 continue;
424 if (disc.major == 0 && disc.minor == 0)
425 continue;
426 sprintf(dvname,"%d:%d", disc.major, disc.minor);
427 sfd = dev_open(dvname, O_RDONLY);
428 if (sfd >= 0) {
429 close(sfd);
430 continue;
431 }
432 if (dv->disposition == 'f' &&
433 (disc.state & 1) == 1) /* already faulty */
434 continue;
435 if (errno != ENXIO)
436 continue;
437 stb.st_rdev = makedev(disc.major, disc.minor);
438 next = dv;
439 jnext = j+1;
440 dnprintable = dvname;
441 break;
442 }
443 if (jnext == 0)
444 continue;
445 } else {
446 j = 0;
447
448 tfd = dev_open(dv->devname, O_RDONLY);
449 if (tfd < 0 && dv->disposition == 'r' &&
450 lstat(dv->devname, &stb) == 0)
451 /* Be happy, the lstat worked, that is
452 * enough for --remove
453 */
454 ;
455 else {
456 if (tfd < 0 || fstat(tfd, &stb) != 0) {
457 fprintf(stderr, Name ": cannot find %s: %s\n",
458 dv->devname, strerror(errno));
459 if (tfd >= 0)
460 close(tfd);
461 return 1;
462 }
463 close(tfd);
464 }
465 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
466 fprintf(stderr, Name ": %s is not a "
467 "block device.\n",
468 dv->devname);
469 return 1;
470 }
471 }
472 switch(dv->disposition){
473 default:
474 fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
475 dv->devname, dv->disposition);
476 return 1;
477 case 'a':
478 /* add the device */
479 if (tst->subarray[0]) {
480 fprintf(stderr, Name ": Cannot add disks to a"
481 " \'member\' array, perform this"
482 " operation on the parent container\n");
483 return 1;
484 }
485 /* Make sure it isn't in use (in 2.6 or later) */
486 tfd = dev_open(dv->devname, O_RDONLY|O_EXCL|O_DIRECT);
487 if (tfd < 0) {
488 fprintf(stderr, Name ": Cannot open %s: %s\n",
489 dv->devname, strerror(errno));
490 return 1;
491 }
492 remove_partitions(tfd);
493
494 st = dup_super(tst);
495
496 if (array.not_persistent==0)
497 st->ss->load_super(st, tfd, NULL);
498
499 if (!get_dev_size(tfd, dv->devname, &ldsize)) {
500 close(tfd);
501 return 1;
502 }
503 close(tfd);
504
505
506 if (!tst->ss->external &&
507 array.major_version == 0 &&
508 md_get_version(fd)%100 < 2) {
509 if (ioctl(fd, HOT_ADD_DISK,
510 (unsigned long)stb.st_rdev)==0) {
511 if (verbose >= 0)
512 fprintf(stderr, Name ": hot added %s\n",
513 dv->devname);
514 continue;
515 }
516
517 fprintf(stderr, Name ": hot add failed for %s: %s\n",
518 dv->devname, strerror(errno));
519 return 1;
520 }
521
522 if (array.not_persistent == 0 || tst->ss->external) {
523
524 /* need to find a sample superblock to copy, and
525 * a spare slot to use.
526 * For 'external' array (well, container based),
527 * We can just load the metadata for the array.
528 */
529 if (tst->ss->external) {
530 tst->ss->load_super(tst, fd, NULL);
531 } else for (j = 0; j < tst->max_devs; j++) {
532 char *dev;
533 int dfd;
534 disc.number = j;
535 if (ioctl(fd, GET_DISK_INFO, &disc))
536 continue;
537 if (disc.major==0 && disc.minor==0)
538 continue;
539 if ((disc.state & 4)==0) continue; /* sync */
540 /* Looks like a good device to try */
541 dev = map_dev(disc.major, disc.minor, 1);
542 if (!dev) continue;
543 dfd = dev_open(dev, O_RDONLY);
544 if (dfd < 0) continue;
545 if (tst->ss->load_super(tst, dfd,
546 NULL)) {
547 close(dfd);
548 continue;
549 }
550 close(dfd);
551 break;
552 }
553 /* FIXME this is a bad test to be using */
554 if (!tst->sb) {
555 fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
556 return 1;
557 }
558
559 /* Make sure device is large enough */
560 if (tst->ss->avail_size(tst, ldsize/512) <
561 array_size) {
562 fprintf(stderr, Name ": %s not large enough to join array\n",
563 dv->devname);
564 return 1;
565 }
566
567 /* Possibly this device was recently part of the array
568 * and was temporarily removed, and is now being re-added.
569 * If so, we can simply re-add it.
570 */
571 tst->ss->uuid_from_super(tst, duuid);
572
573 /* re-add doesn't work for version-1 superblocks
574 * before 2.6.18 :-(
575 */
576 if (array.major_version == 1 &&
577 get_linux_version() <= 2006018)
578 ;
579 else if (st->sb) {
580 st->ss->uuid_from_super(st, ouuid);
581 if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
582 /* looks close enough for now. Kernel
583 * will worry about whether a bitmap
584 * based reconstruction is possible.
585 */
586 struct mdinfo mdi;
587 st->ss->getinfo_super(st, &mdi);
588 disc.major = major(stb.st_rdev);
589 disc.minor = minor(stb.st_rdev);
590 disc.number = mdi.disk.number;
591 disc.raid_disk = mdi.disk.raid_disk;
592 disc.state = mdi.disk.state;
593 if (dv->writemostly == 1)
594 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
595 if (dv->writemostly == 2)
596 disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
597 /* don't even try if disk is marked as faulty */
598 errno = 0;
599 if ((disc.state & 1) == 0 &&
600 ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
601 if (verbose >= 0)
602 fprintf(stderr, Name ": re-added %s\n", dv->devname);
603 continue;
604 }
605 if (errno == ENOMEM || errno == EROFS) {
606 fprintf(stderr, Name ": add new device failed for %s: %s\n",
607 dv->devname, strerror(errno));
608 return 1;
609 }
610 /* fall back on normal-add */
611 }
612 }
613 if (dv->re_add) {
614 fprintf(stderr, Name
615 ": --re-add for %s to %s is not possible\n",
616 dv->devname, devname);
617 return 1;
618 }
619 } else {
620 /* non-persistent. Must ensure that new drive
621 * is at least array.size big.
622 */
623 if (ldsize/512 < array_size) {
624 fprintf(stderr, Name ": %s not large enough to join array\n",
625 dv->devname);
626 return 1;
627 }
628 }
629 /* in 2.6.17 and earlier, version-1 superblocks won't
630 * use the number we write, but will choose a free number.
631 * we must choose the same free number, which requires
632 * starting at 'raid_disks' and counting up
633 */
634 for (j = array.raid_disks; j< tst->max_devs; j++) {
635 disc.number = j;
636 if (ioctl(fd, GET_DISK_INFO, &disc))
637 break;
638 if (disc.major==0 && disc.minor==0)
639 break;
640 if (disc.state & 8) /* removed */
641 break;
642 }
643 disc.major = major(stb.st_rdev);
644 disc.minor = minor(stb.st_rdev);
645 disc.number =j;
646 disc.state = 0;
647 if (array.not_persistent==0 || tst->ss->external) {
648 int dfd;
649 if (dv->writemostly == 1)
650 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
651 dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
652 if (tst->ss->add_to_super(tst, &disc, dfd,
653 dv->devname)) {
654 close(dfd);
655 return 1;
656 }
657 /* write_init_super will close 'dfd' */
658 if (tst->ss->external)
659 /* mdmon will write the metadata */
660 close(dfd);
661 else if (tst->ss->write_init_super(tst))
662 return 1;
663 } else if (dv->re_add) {
664 /* this had better be raid1.
665 * As we are "--re-add"ing we must find a spare slot
666 * to fill.
667 */
668 char *used = malloc(array.raid_disks);
669 memset(used, 0, array.raid_disks);
670 for (j=0; j< tst->max_devs; j++) {
671 mdu_disk_info_t disc2;
672 disc2.number = j;
673 if (ioctl(fd, GET_DISK_INFO, &disc2))
674 continue;
675 if (disc2.major==0 && disc2.minor==0)
676 continue;
677 if (disc2.state & 8) /* removed */
678 continue;
679 if (disc2.raid_disk < 0)
680 continue;
681 if (disc2.raid_disk > array.raid_disks)
682 continue;
683 used[disc2.raid_disk] = 1;
684 }
685 for (j=0 ; j<array.raid_disks; j++)
686 if (!used[j]) {
687 disc.raid_disk = j;
688 disc.state |= (1<<MD_DISK_SYNC);
689 break;
690 }
691 free(used);
692 }
693 if (dv->writemostly == 1)
694 disc.state |= (1 << MD_DISK_WRITEMOSTLY);
695 if (tst->ss->external) {
696 /* add a disk to an external metadata container
697 * only if mdmon is around to see it
698 */
699 struct mdinfo new_mdi;
700 struct mdinfo *sra;
701 int container_fd;
702 int devnum = fd2devnum(fd);
703
704 container_fd = open_dev_excl(devnum);
705 if (container_fd < 0) {
706 fprintf(stderr, Name ": add failed for %s:"
707 " could not get exclusive access to container\n",
708 dv->devname);
709 return 1;
710 }
711
712 if (!mdmon_running(devnum)) {
713 fprintf(stderr, Name ": add failed for %s: mdmon not running\n",
714 dv->devname);
715 close(container_fd);
716 return 1;
717 }
718
719 sra = sysfs_read(container_fd, -1, 0);
720 if (!sra) {
721 fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n",
722 dv->devname);
723 close(container_fd);
724 return 1;
725 }
726 sra->array.level = LEVEL_CONTAINER;
727 /* Need to set data_offset and component_size */
728 tst->ss->getinfo_super(tst, &new_mdi);
729 new_mdi.disk.major = disc.major;
730 new_mdi.disk.minor = disc.minor;
731 new_mdi.recovery_start = 0;
732 if (sysfs_add_disk(sra, &new_mdi, 0) != 0) {
733 fprintf(stderr, Name ": add new device to external metadata"
734 " failed for %s\n", dv->devname);
735 close(container_fd);
736 return 1;
737 }
738 ping_monitor(devnum2devname(devnum));
739 sysfs_free(sra);
740 close(container_fd);
741 } else if (ioctl(fd, ADD_NEW_DISK, &disc)) {
742 fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
743 dv->devname, j, strerror(errno));
744 return 1;
745 }
746 if (verbose >= 0)
747 fprintf(stderr, Name ": added %s\n", dv->devname);
748 break;
749
750 case 'r':
751 /* hot remove */
752 if (tst->subarray[0]) {
753 fprintf(stderr, Name ": Cannot remove disks from a"
754 " \'member\' array, perform this"
755 " operation on the parent container\n");
756 return 1;
757 }
758 if (tst->ss->external) {
759 /* To remove a device from a container, we must
760 * check that it isn't in use in an array.
761 * This involves looking in the 'holders'
762 * directory - there must be just one entry,
763 * the container.
764 * To ensure that it doesn't get used as a
765 * hold spare while we are checking, we
766 * get an O_EXCL open on the container
767 */
768 int dnum = fd2devnum(fd);
769 lfd = open_dev_excl(dnum);
770 if (lfd < 0) {
771 fprintf(stderr, Name
772 ": Cannot get exclusive access "
773 " to container - odd\n");
774 return 1;
775 }
776 /* in the detached case it is not possible to
777 * check if we are the unique holder, so just
778 * rely on the 'detached' checks
779 */
780 if (strcmp(dv->devname, "detached") == 0 ||
781 sysfs_unique_holder(dnum, stb.st_rdev))
782 /* pass */;
783 else {
784 fprintf(stderr, Name
785 ": %s is %s, cannot remove.\n",
786 dnprintable,
787 errno == EEXIST ? "still in use":
788 "not a member");
789 close(lfd);
790 return 1;
791 }
792 }
793 /* FIXME check that it is a current member */
794 err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev);
795 if (err && errno == ENODEV) {
796 /* Old kernels rejected this if no personality
797 * registered */
798 struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS);
799 struct mdinfo *dv = NULL;
800 if (sra)
801 dv = sra->devs;
802 for ( ; dv ; dv=dv->next)
803 if (dv->disk.major == major(stb.st_rdev) &&
804 dv->disk.minor == minor(stb.st_rdev))
805 break;
806 if (dv)
807 err = sysfs_set_str(sra, dv,
808 "state", "remove");
809 else
810 err = -1;
811 if (sra)
812 sysfs_free(sra);
813 }
814 if (err) {
815 fprintf(stderr, Name ": hot remove failed "
816 "for %s: %s\n", dnprintable,
817 strerror(errno));
818 if (lfd >= 0)
819 close(lfd);
820 return 1;
821 }
822 if (tst->ss->external) {
823 /*
824 * Before dropping our exclusive open we make an
825 * attempt at preventing mdmon from seeing an
826 * 'add' event before reconciling this 'remove'
827 * event.
828 */
829 char *name = devnum2devname(fd2devnum(fd));
830
831 if (!name) {
832 fprintf(stderr, Name ": unable to get container name\n");
833 return 1;
834 }
835
836 ping_manager(name);
837 free(name);
838 }
839 close(lfd);
840 if (verbose >= 0)
841 fprintf(stderr, Name ": hot removed %s\n",
842 dnprintable);
843 break;
844
845 case 'f': /* set faulty */
846 /* FIXME check current member */
847 if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
848 fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
849 dnprintable, strerror(errno));
850 return 1;
851 }
852 if (verbose >= 0)
853 fprintf(stderr, Name ": set %s faulty in %s\n",
854 dnprintable, devname);
855 break;
856 }
857 }
858 return 0;
859
860 }
861
862 int autodetect(void)
863 {
864 /* Open any md device, and issue the RAID_AUTORUN ioctl */
865 int rv = 1;
866 int fd = dev_open("9:0", O_RDONLY);
867 if (fd >= 0) {
868 if (ioctl(fd, RAID_AUTORUN, 0) == 0)
869 rv = 0;
870 close(fd);
871 }
872 return rv;
873 }
874 #endif
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