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