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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 /* 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 || fstat(tfd, &stb) != 0) {
429 fprintf(stderr, Name ": cannot find %s: %s\n",
430 dv->devname, strerror(errno));
431 if (tfd >= 0)
432 close(tfd);
433 return 1;
434 }
435 close(tfd);
436 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
437 fprintf(stderr, Name ": %s is not a "
438 "block device.\n",
439 dv->devname);
440 return 1;
441 }
442 }
443 switch(dv->disposition){
444 default:
445 fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
446 dv->devname, dv->disposition);
447 return 1;
448 case 'a':
449 /* add the device */
450 if (tst->subarray[0]) {
451 fprintf(stderr, Name ": Cannot add disks to a"
452 " \'member\' array, perform this"
453 " operation on the parent container\n");
454 return 1;
455 }
456 /* Make sure it isn't in use (in 2.6 or later) */
457 tfd = dev_open(dv->devname, O_RDONLY|O_EXCL|O_DIRECT);
458 if (tfd < 0) {
459 fprintf(stderr, Name ": Cannot open %s: %s\n",
460 dv->devname, strerror(errno));
461 return 1;
462 }
463 remove_partitions(tfd);
464
465 st = dup_super(tst);
466
467 if (array.not_persistent==0)
468 st->ss->load_super(st, tfd, NULL);
469
470 if (!get_dev_size(tfd, dv->devname, &ldsize)) {
471 close(tfd);
472 return 1;
473 }
474 close(tfd);
475
476
477 if (!tst->ss->external &&
478 array.major_version == 0 &&
479 md_get_version(fd)%100 < 2) {
480 if (ioctl(fd, HOT_ADD_DISK,
481 (unsigned long)stb.st_rdev)==0) {
482 if (verbose >= 0)
483 fprintf(stderr, Name ": hot added %s\n",
484 dv->devname);
485 continue;
486 }
487
488 fprintf(stderr, Name ": hot add failed for %s: %s\n",
489 dv->devname, strerror(errno));
490 return 1;
491 }
492
493 if (array.not_persistent == 0 || tst->ss->external) {
494
495 /* need to find a sample superblock to copy, and
496 * a spare slot to use.
497 * For 'external' array (well, container based),
498 * We can just load the metadata for the array.
499 */
500 if (tst->ss->external) {
501 tst->ss->load_super(tst, fd, NULL);
502 } else for (j = 0; j < tst->max_devs; j++) {
503 char *dev;
504 int dfd;
505 disc.number = j;
506 if (ioctl(fd, GET_DISK_INFO, &disc))
507 continue;
508 if (disc.major==0 && disc.minor==0)
509 continue;
510 if ((disc.state & 4)==0) continue; /* sync */
511 /* Looks like a good device to try */
512 dev = map_dev(disc.major, disc.minor, 1);
513 if (!dev) continue;
514 dfd = dev_open(dev, O_RDONLY);
515 if (dfd < 0) continue;
516 if (tst->ss->load_super(tst, dfd,
517 NULL)) {
518 close(dfd);
519 continue;
520 }
521 close(dfd);
522 break;
523 }
524 /* FIXME this is a bad test to be using */
525 if (!tst->sb) {
526 fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
527 return 1;
528 }
529
530 /* Make sure device is large enough */
531 if (tst->ss->avail_size(tst, ldsize/512) <
532 array_size) {
533 fprintf(stderr, Name ": %s not large enough to join array\n",
534 dv->devname);
535 return 1;
536 }
537
538 /* Possibly this device was recently part of the array
539 * and was temporarily removed, and is now being re-added.
540 * If so, we can simply re-add it.
541 */
542 tst->ss->uuid_from_super(tst, duuid);
543
544 /* re-add doesn't work for version-1 superblocks
545 * before 2.6.18 :-(
546 */
547 if (array.major_version == 1 &&
548 get_linux_version() <= 2006018)
549 ;
550 else if (st->sb) {
551 st->ss->uuid_from_super(st, ouuid);
552 if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
553 /* looks close enough for now. Kernel
554 * will worry about whether a bitmap
555 * based reconstruction is possible.
556 */
557 struct mdinfo mdi;
558 st->ss->getinfo_super(st, &mdi);
559 disc.major = major(stb.st_rdev);
560 disc.minor = minor(stb.st_rdev);
561 disc.number = mdi.disk.number;
562 disc.raid_disk = mdi.disk.raid_disk;
563 disc.state = mdi.disk.state;
564 if (dv->writemostly == 1)
565 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
566 if (dv->writemostly == 2)
567 disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
568 if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
569 if (verbose >= 0)
570 fprintf(stderr, Name ": re-added %s\n", dv->devname);
571 continue;
572 }
573 if (errno == ENOMEM || errno == EROFS) {
574 fprintf(stderr, Name ": add new device failed for %s: %s\n",
575 dv->devname, strerror(errno));
576 return 1;
577 }
578 /* fall back on normal-add */
579 }
580 }
581 if (dv->re_add) {
582 fprintf(stderr, Name
583 ": --re-add for %s to %s is not possible\n",
584 dv->devname, devname);
585 return 1;
586 }
587 } else {
588 /* non-persistent. Must ensure that new drive
589 * is at least array.size big.
590 */
591 if (ldsize/512 < array_size) {
592 fprintf(stderr, Name ": %s not large enough to join array\n",
593 dv->devname);
594 return 1;
595 }
596 }
597 /* in 2.6.17 and earlier, version-1 superblocks won't
598 * use the number we write, but will choose a free number.
599 * we must choose the same free number, which requires
600 * starting at 'raid_disks' and counting up
601 */
602 for (j = array.raid_disks; j< tst->max_devs; j++) {
603 disc.number = j;
604 if (ioctl(fd, GET_DISK_INFO, &disc))
605 break;
606 if (disc.major==0 && disc.minor==0)
607 break;
608 if (disc.state & 8) /* removed */
609 break;
610 }
611 disc.major = major(stb.st_rdev);
612 disc.minor = minor(stb.st_rdev);
613 disc.number =j;
614 disc.state = 0;
615 if (array.not_persistent==0 || tst->ss->external) {
616 int dfd;
617 if (dv->writemostly == 1)
618 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
619 dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
620 if (tst->ss->add_to_super(tst, &disc, dfd,
621 dv->devname)) {
622 close(dfd);
623 return 1;
624 }
625 /* write_init_super will close 'dfd' */
626 if (tst->ss->external)
627 /* mdmon will write the metadata */
628 close(dfd);
629 else if (tst->ss->write_init_super(tst))
630 return 1;
631 } else if (dv->re_add) {
632 /* this had better be raid1.
633 * As we are "--re-add"ing we must find a spare slot
634 * to fill.
635 */
636 char *used = malloc(array.raid_disks);
637 memset(used, 0, array.raid_disks);
638 for (j=0; j< tst->max_devs; j++) {
639 mdu_disk_info_t disc2;
640 disc2.number = j;
641 if (ioctl(fd, GET_DISK_INFO, &disc2))
642 continue;
643 if (disc2.major==0 && disc2.minor==0)
644 continue;
645 if (disc2.state & 8) /* removed */
646 continue;
647 if (disc2.raid_disk < 0)
648 continue;
649 if (disc2.raid_disk > array.raid_disks)
650 continue;
651 used[disc2.raid_disk] = 1;
652 }
653 for (j=0 ; j<array.raid_disks; j++)
654 if (!used[j]) {
655 disc.raid_disk = j;
656 disc.state |= (1<<MD_DISK_SYNC);
657 break;
658 }
659 free(used);
660 }
661 if (dv->writemostly == 1)
662 disc.state |= (1 << MD_DISK_WRITEMOSTLY);
663 if (tst->ss->external) {
664 /* add a disk to an external metadata container
665 * only if mdmon is around to see it
666 */
667 struct mdinfo new_mdi;
668 struct mdinfo *sra;
669 int container_fd;
670 int devnum = fd2devnum(fd);
671
672 container_fd = open_dev_excl(devnum);
673 if (container_fd < 0) {
674 fprintf(stderr, Name ": add failed for %s:"
675 " could not get exclusive access to container\n",
676 dv->devname);
677 return 1;
678 }
679
680 if (!mdmon_running(devnum)) {
681 fprintf(stderr, Name ": add failed for %s: mdmon not running\n",
682 dv->devname);
683 close(container_fd);
684 return 1;
685 }
686
687 sra = sysfs_read(container_fd, -1, 0);
688 if (!sra) {
689 fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n",
690 dv->devname);
691 close(container_fd);
692 return 1;
693 }
694 sra->array.level = LEVEL_CONTAINER;
695 /* Need to set data_offset and component_size */
696 tst->ss->getinfo_super(tst, &new_mdi);
697 new_mdi.disk.major = disc.major;
698 new_mdi.disk.minor = disc.minor;
699 new_mdi.recovery_start = 0;
700 if (sysfs_add_disk(sra, &new_mdi) != 0) {
701 fprintf(stderr, Name ": add new device to external metadata"
702 " failed for %s\n", dv->devname);
703 close(container_fd);
704 return 1;
705 }
706 ping_monitor(devnum2devname(devnum));
707 sysfs_free(sra);
708 close(container_fd);
709 } else if (ioctl(fd, ADD_NEW_DISK, &disc)) {
710 fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
711 dv->devname, j, strerror(errno));
712 return 1;
713 }
714 if (verbose >= 0)
715 fprintf(stderr, Name ": added %s\n", dv->devname);
716 break;
717
718 case 'r':
719 /* hot remove */
720 if (tst->subarray[0]) {
721 fprintf(stderr, Name ": Cannot remove disks from a"
722 " \'member\' array, perform this"
723 " operation on the parent container\n");
724 return 1;
725 }
726 if (tst->ss->external) {
727 /* To remove a device from a container, we must
728 * check that it isn't in use in an array.
729 * This involves looking in the 'holders'
730 * directory - there must be just one entry,
731 * the container.
732 * To ensure that it doesn't get used as a
733 * hold spare while we are checking, we
734 * get an O_EXCL open on the container
735 */
736 int dnum = fd2devnum(fd);
737 lfd = open_dev_excl(dnum);
738 if (lfd < 0) {
739 fprintf(stderr, Name
740 ": Cannot get exclusive access "
741 " to container - odd\n");
742 return 1;
743 }
744 /* in the detached case it is not possible to
745 * check if we are the unique holder, so just
746 * rely on the 'detached' checks
747 */
748 if (strcmp(dv->devname, "detached") == 0 ||
749 sysfs_unique_holder(dnum, stb.st_rdev))
750 /* pass */;
751 else {
752 fprintf(stderr, Name
753 ": %s is %s, cannot remove.\n",
754 dnprintable,
755 errno == EEXIST ? "still in use":
756 "not a member");
757 close(lfd);
758 return 1;
759 }
760 }
761 /* FIXME check that it is a current member */
762 err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev);
763 if (err && errno == ENODEV) {
764 /* Old kernels rejected this if no personality
765 * registered */
766 struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS);
767 struct mdinfo *dv = NULL;
768 if (sra)
769 dv = sra->devs;
770 for ( ; dv ; dv=dv->next)
771 if (dv->disk.major == major(stb.st_rdev) &&
772 dv->disk.minor == minor(stb.st_rdev))
773 break;
774 if (dv)
775 err = sysfs_set_str(sra, dv,
776 "state", "remove");
777 else
778 err = -1;
779 if (sra)
780 sysfs_free(sra);
781 }
782 if (err) {
783 fprintf(stderr, Name ": hot remove failed "
784 "for %s: %s\n", dnprintable,
785 strerror(errno));
786 if (lfd >= 0)
787 close(lfd);
788 return 1;
789 }
790 if (tst->ss->external) {
791 /*
792 * Before dropping our exclusive open we make an
793 * attempt at preventing mdmon from seeing an
794 * 'add' event before reconciling this 'remove'
795 * event.
796 */
797 char *name = devnum2devname(fd2devnum(fd));
798
799 if (!name) {
800 fprintf(stderr, Name ": unable to get container name\n");
801 return 1;
802 }
803
804 ping_manager(name);
805 free(name);
806 }
807 close(lfd);
808 if (verbose >= 0)
809 fprintf(stderr, Name ": hot removed %s\n",
810 dnprintable);
811 break;
812
813 case 'f': /* set faulty */
814 /* FIXME check current member */
815 if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
816 fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
817 dnprintable, strerror(errno));
818 return 1;
819 }
820 if (verbose >= 0)
821 fprintf(stderr, Name ": set %s faulty in %s\n",
822 dnprintable, devname);
823 break;
824 }
825 }
826 return 0;
827
828 }
829
830 int autodetect(void)
831 {
832 /* Open any md device, and issue the RAID_AUTORUN ioctl */
833 int rv = 1;
834 int fd = dev_open("9:0", O_RDONLY);
835 if (fd >= 0) {
836 if (ioctl(fd, RAID_AUTORUN, 0) == 0)
837 rv = 0;
838 close(fd);
839 }
840 return rv;
841 }
842 #endif
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