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[thirdparty/mdadm.git] / Manage.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2006 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@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 */
29
30 #include "mdadm.h"
31 #include "md_u.h"
32 #include "md_p.h"
33 #include <ctype.h>
34
35 #define REGISTER_DEV _IO (MD_MAJOR, 1)
36 #define START_MD _IO (MD_MAJOR, 2)
37 #define STOP_MD _IO (MD_MAJOR, 3)
38
39 int Manage_ro(char *devname, int fd, int readonly)
40 {
41 /* switch to readonly or rw
42 *
43 * requires >= 0.90.0
44 * first check that array is runing
45 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
46 *
47 */
48 mdu_array_info_t array;
49 #ifndef MDASSEMBLE
50 struct mdinfo *mdi;
51 #endif
52
53 if (md_get_version(fd) < 9000) {
54 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
55 return 1;
56 }
57 #ifndef MDASSEMBLE
58 /* If this is an externally-manage array, we need to modify the
59 * metadata_version so that mdmon doesn't undo our change.
60 */
61 mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
62 if (mdi &&
63 mdi->array.major_version == -1 &&
64 mdi->array.level > 0 &&
65 is_subarray(mdi->text_version)) {
66 char vers[64];
67 strcpy(vers, "external:");
68 strcat(vers, mdi->text_version);
69 if (readonly > 0) {
70 int rv;
71 /* We set readonly ourselves. */
72 vers[9] = '-';
73 sysfs_set_str(mdi, NULL, "metadata_version", vers);
74
75 close(fd);
76 rv = sysfs_set_str(mdi, NULL, "array_state", "readonly");
77
78 if (rv < 0) {
79 fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
80 devname, strerror(errno));
81
82 vers[9] = mdi->text_version[0];
83 sysfs_set_str(mdi, NULL, "metadata_version", vers);
84 return 1;
85 }
86 } else {
87 char *cp;
88 /* We cannot set read/write - must signal mdmon */
89 vers[9] = '/';
90 sysfs_set_str(mdi, NULL, "metadata_version", vers);
91
92 cp = strchr(vers+10, '/');
93 if (*cp)
94 *cp = 0;
95 ping_monitor(vers+10);
96 }
97 return 0;
98 }
99 #endif
100 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
101 fprintf(stderr, Name ": %s does not appear to be active.\n",
102 devname);
103 return 1;
104 }
105
106 if (readonly>0) {
107 if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
108 fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
109 devname, strerror(errno));
110 return 1;
111 }
112 } else if (readonly < 0) {
113 if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
114 fprintf(stderr, Name ": failed to set writable for %s: %s\n",
115 devname, strerror(errno));
116 return 1;
117 }
118 }
119 return 0;
120 }
121
122 #ifndef MDASSEMBLE
123
124 static void remove_devices(int devnum, char *path)
125 {
126 /* Remove all 'standard' devices for 'devnum', including
127 * partitions. Also remove names at 'path' - possibly with
128 * partition suffixes - which link to those names.
129 */
130 char base[40];
131 char *path2;
132 char link[1024];
133 int n;
134 int part;
135 char *be;
136 char *pe;
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 if (path) {
144 path2 = malloc(strlen(path)+20);
145 strcpy(path2, path);
146 pe = path2 + strlen(path2);
147 } else
148 path = NULL;
149
150 for (part = 0; part < 16; part++) {
151 if (part) {
152 sprintf(be, "p%d", part);
153 if (isdigit(pe[-1]))
154 sprintf(pe, "p%d", part);
155 else
156 sprintf(pe, "%d", part);
157 }
158 /* FIXME test if really is md device ?? */
159 unlink(base);
160 if (path) {
161 n = readlink(path2, link, sizeof(link));
162 if (n && strlen(base) == n &&
163 strncmp(link, base, n) == 0)
164 unlink(path2);
165 }
166 }
167 }
168
169
170 int Manage_runstop(char *devname, int fd, int runstop, int quiet)
171 {
172 /* Run or stop the array. array must already be configured
173 * required >= 0.90.0
174 * Only print failure messages if quiet == 0;
175 * quiet > 0 means really be quiet
176 * quiet < 0 means we will try again if it fails.
177 */
178 mdu_param_t param; /* unused */
179
180 if (runstop == -1 && md_get_version(fd) < 9000) {
181 if (ioctl(fd, STOP_MD, 0)) {
182 if (quiet == 0) fprintf(stderr,
183 Name ": stopping device %s "
184 "failed: %s\n",
185 devname, strerror(errno));
186 return 1;
187 }
188 }
189
190 if (md_get_version(fd) < 9000) {
191 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
192 return 1;
193 }
194 /*
195 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
196 fprintf(stderr, Name ": %s does not appear to be active.\n",
197 devname);
198 return 1;
199 }
200 */
201 if (runstop>0) {
202 if (ioctl(fd, RUN_ARRAY, &param)) {
203 fprintf(stderr, Name ": failed to run array %s: %s\n",
204 devname, strerror(errno));
205 return 1;
206 }
207 if (quiet <= 0)
208 fprintf(stderr, Name ": started %s\n", devname);
209 } else if (runstop < 0){
210 struct map_ent *map = NULL;
211 struct stat stb;
212 struct mdinfo *mdi;
213 int devnum;
214 /* If this is an mdmon managed array, just write 'inactive'
215 * to the array state and let mdmon clear up.
216 */
217 devnum = fd2devnum(fd);
218 mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
219 if (mdi &&
220 mdi->array.level > 0 &&
221 is_subarray(mdi->text_version)) {
222 /* This is mdmon managed. */
223 close(fd);
224 if (sysfs_set_str(mdi, NULL,
225 "array_state", "inactive") < 0) {
226 if (quiet == 0)
227 fprintf(stderr, Name
228 ": failed to stop array %s: %s\n",
229 devname, strerror(errno));
230 return 1;
231 }
232
233 /* Give monitor a chance to act */
234 ping_monitor(mdi->text_version);
235
236 fd = open(devname, O_RDONLY);
237 } else if (mdi &&
238 mdi->array.major_version == -1 &&
239 mdi->array.minor_version == -2 &&
240 !is_subarray(mdi->text_version)) {
241 /* container, possibly mdmon-managed.
242 * Make sure mdmon isn't opening it, which
243 * would interfere with the 'stop'
244 */
245 ping_monitor(mdi->sys_name);
246 }
247
248 if (fd >= 0 && ioctl(fd, STOP_ARRAY, NULL)) {
249 if (quiet == 0) {
250 fprintf(stderr, Name
251 ": failed to stop array %s: %s\n",
252 devname, strerror(errno));
253 if (errno == EBUSY)
254 fprintf(stderr, "Perhaps a running "
255 "process, mounted filesystem "
256 "or active volume group?\n");
257 }
258 if (mdi)
259 sysfs_free(mdi);
260 return 1;
261 }
262 /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
263 * was stopped, so We'll do it here just to be sure.
264 */
265 if (mdi)
266 sysfs_uevent(mdi, "change");
267
268
269 if (devnum != NoMdDev &&
270 (stat("/dev/.udev", &stb) != 0 ||
271 check_env("MDADM_NO_UDEV"))) {
272 struct map_ent *mp = map_by_devnum(&map, devnum);
273 remove_devices(devnum, mp ? mp->path : NULL);
274 }
275
276
277 if (quiet <= 0)
278 fprintf(stderr, Name ": stopped %s\n", devname);
279 if (devnum != NoMdDev) {
280 map_delete(&map, devnum);
281 map_write(map);
282 map_free(map);
283 }
284 }
285 return 0;
286 }
287
288 int Manage_resize(char *devname, int fd, long long size, int raid_disks)
289 {
290 mdu_array_info_t info;
291 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
292 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
293 devname, strerror(errno));
294 return 1;
295 }
296 if (size >= 0)
297 info.size = size;
298 if (raid_disks > 0)
299 info.raid_disks = raid_disks;
300 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
301 fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
302 devname, strerror(errno));
303 return 1;
304 }
305 return 0;
306 }
307
308 int Manage_reconfig(char *devname, int fd, int layout)
309 {
310 mdu_array_info_t info;
311 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
312 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
313 devname, strerror(errno));
314 return 1;
315 }
316 info.layout = layout;
317 printf("layout set to %d\n", info.layout);
318 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
319 fprintf(stderr, Name ": Cannot set layout 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)
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 */
341 mdu_array_info_t array;
342 mdu_disk_info_t disc;
343 unsigned long long array_size;
344 mddev_dev_t dv, next = NULL;
345 struct stat stb;
346 int j, jnext = 0;
347 int tfd;
348 struct supertype *st, *tst;
349 int duuid[4];
350 int ouuid[4];
351 int lfd = -1;
352
353 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
354 fprintf(stderr, Name ": cannot get array info for %s\n",
355 devname);
356 return 1;
357 }
358
359 /* array.size is only 32 bit and may be truncated.
360 * So read from sysfs if possible, and record number of sectors
361 */
362
363 array_size = get_component_size(fd);
364 if (array_size <= 0)
365 array_size = array.size * 2;
366
367 tst = super_by_fd(fd);
368 if (!tst) {
369 fprintf(stderr, Name ": unsupport array - version %d.%d\n",
370 array.major_version, array.minor_version);
371 return 1;
372 }
373
374 for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
375 unsigned long long ldsize;
376 char dvname[20];
377 char *dnprintable = dv->devname;
378 int err;
379
380 next = dv->next;
381 jnext = 0;
382
383 if (strcmp(dv->devname, "failed")==0 ||
384 strcmp(dv->devname, "faulty")==0) {
385 if (dv->disposition != 'r') {
386 fprintf(stderr, Name ": %s only meaningful "
387 "with -r, not -%c\n",
388 dv->devname, dv->disposition);
389 return 1;
390 }
391 for (; j < array.raid_disks + array.nr_disks ; j++) {
392 disc.number = j;
393 if (ioctl(fd, GET_DISK_INFO, &disc))
394 continue;
395 if (disc.major == 0 && disc.minor == 0)
396 continue;
397 if ((disc.state & 1) == 0) /* faulty */
398 continue;
399 stb.st_rdev = makedev(disc.major, disc.minor);
400 next = dv;
401 jnext = j+1;
402 sprintf(dvname,"%d:%d", disc.major, disc.minor);
403 dnprintable = dvname;
404 break;
405 }
406 if (jnext == 0)
407 continue;
408 } else if (strcmp(dv->devname, "detached") == 0) {
409 if (dv->disposition != 'r' && dv->disposition != 'f') {
410 fprintf(stderr, Name ": %s only meaningful "
411 "with -r of -f, not -%c\n",
412 dv->devname, dv->disposition);
413 return 1;
414 }
415 for (; j < array.raid_disks + array.nr_disks; j++) {
416 int sfd;
417 disc.number = j;
418 if (ioctl(fd, GET_DISK_INFO, &disc))
419 continue;
420 if (disc.major == 0 && disc.minor == 0)
421 continue;
422 sprintf(dvname,"%d:%d", disc.major, disc.minor);
423 sfd = dev_open(dvname, O_RDONLY);
424 if (sfd >= 0) {
425 close(sfd);
426 continue;
427 }
428 if (dv->disposition == 'f' &&
429 (disc.state & 1) == 1) /* already faulty */
430 continue;
431 if (errno != ENXIO)
432 continue;
433 stb.st_rdev = makedev(disc.major, disc.minor);
434 next = dv;
435 jnext = j+1;
436 dnprintable = dvname;
437 break;
438 }
439 if (jnext == 0)
440 continue;
441 } else {
442 j = 0;
443
444 if (stat(dv->devname, &stb)) {
445 fprintf(stderr, Name ": cannot find %s: %s\n",
446 dv->devname, strerror(errno));
447 return 1;
448 }
449 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
450 fprintf(stderr, Name ": %s is not a "
451 "block device.\n",
452 dv->devname);
453 return 1;
454 }
455 }
456 switch(dv->disposition){
457 default:
458 fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
459 dv->devname, dv->disposition);
460 return 1;
461 case 'a':
462 /* add the device */
463 if (tst->subarray[0]) {
464 fprintf(stderr, Name ": Cannot add disks to a"
465 " \'member\' array, perform this"
466 " operation on the parent container\n");
467 return 1;
468 }
469 /* Make sure it isn't in use (in 2.6 or later) */
470 tfd = open(dv->devname, O_RDONLY|O_EXCL|O_DIRECT);
471 if (tfd < 0) {
472 fprintf(stderr, Name ": Cannot open %s: %s\n",
473 dv->devname, strerror(errno));
474 return 1;
475 }
476 remove_partitions(tfd);
477
478 st = dup_super(tst);
479
480 if (array.not_persistent==0)
481 st->ss->load_super(st, tfd, NULL);
482
483 if (!get_dev_size(tfd, dv->devname, &ldsize)) {
484 close(tfd);
485 return 1;
486 }
487 close(tfd);
488
489
490 if (!tst->ss->external &&
491 array.major_version == 0 &&
492 md_get_version(fd)%100 < 2) {
493 if (ioctl(fd, HOT_ADD_DISK,
494 (unsigned long)stb.st_rdev)==0) {
495 if (verbose >= 0)
496 fprintf(stderr, Name ": hot added %s\n",
497 dv->devname);
498 continue;
499 }
500
501 fprintf(stderr, Name ": hot add failed for %s: %s\n",
502 dv->devname, strerror(errno));
503 return 1;
504 }
505
506 if (array.not_persistent == 0 || tst->ss->external) {
507
508 /* need to find a sample superblock to copy, and
509 * a spare slot to use.
510 * For 'external' array (well, container based),
511 * We can just load the metadata for the array.
512 */
513 if (tst->ss->external) {
514 tst->ss->load_super(tst, fd, NULL);
515 } else for (j = 0; j < tst->max_devs; j++) {
516 char *dev;
517 int dfd;
518 disc.number = j;
519 if (ioctl(fd, GET_DISK_INFO, &disc))
520 continue;
521 if (disc.major==0 && disc.minor==0)
522 continue;
523 if ((disc.state & 4)==0) continue; /* sync */
524 /* Looks like a good device to try */
525 dev = map_dev(disc.major, disc.minor, 1);
526 if (!dev) continue;
527 dfd = dev_open(dev, O_RDONLY);
528 if (dfd < 0) continue;
529 if (tst->ss->load_super(tst, dfd,
530 NULL)) {
531 close(dfd);
532 continue;
533 }
534 close(dfd);
535 break;
536 }
537 /* FIXME this is a bad test to be using */
538 if (!tst->sb) {
539 fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
540 return 1;
541 }
542
543 /* Make sure device is large enough */
544 if (tst->ss->avail_size(tst, ldsize/512) <
545 array_size) {
546 fprintf(stderr, Name ": %s not large enough to join array\n",
547 dv->devname);
548 return 1;
549 }
550
551 /* Possibly this device was recently part of the array
552 * and was temporarily removed, and is now being re-added.
553 * If so, we can simply re-add it.
554 */
555 tst->ss->uuid_from_super(tst, duuid);
556
557 /* re-add doesn't work for version-1 superblocks
558 * before 2.6.18 :-(
559 */
560 if (array.major_version == 1 &&
561 get_linux_version() <= 2006018)
562 ;
563 else if (st->sb) {
564 st->ss->uuid_from_super(st, ouuid);
565 if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
566 /* looks close enough for now. Kernel
567 * will worry about whether a bitmap
568 * based reconstruction is possible.
569 */
570 struct mdinfo mdi;
571 st->ss->getinfo_super(st, &mdi);
572 disc.major = major(stb.st_rdev);
573 disc.minor = minor(stb.st_rdev);
574 disc.number = mdi.disk.number;
575 disc.raid_disk = mdi.disk.raid_disk;
576 disc.state = mdi.disk.state;
577 if (dv->writemostly == 1)
578 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
579 if (dv->writemostly == 2)
580 disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
581 if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
582 if (verbose >= 0)
583 fprintf(stderr, Name ": re-added %s\n", dv->devname);
584 continue;
585 }
586 /* fall back on normal-add */
587 }
588 }
589 } else {
590 /* non-persistent. Must ensure that new drive
591 * is at least array.size big.
592 */
593 if (ldsize/512 < array_size) {
594 fprintf(stderr, Name ": %s not large enough to join array\n",
595 dv->devname);
596 return 1;
597 }
598 }
599 /* in 2.6.17 and earlier, version-1 superblocks won't
600 * use the number we write, but will choose a free number.
601 * we must choose the same free number, which requires
602 * starting at 'raid_disks' and counting up
603 */
604 for (j = array.raid_disks; j< tst->max_devs; j++) {
605 disc.number = j;
606 if (ioctl(fd, GET_DISK_INFO, &disc))
607 break;
608 if (disc.major==0 && disc.minor==0)
609 break;
610 if (disc.state & 8) /* removed */
611 break;
612 }
613 disc.major = major(stb.st_rdev);
614 disc.minor = minor(stb.st_rdev);
615 disc.number =j;
616 disc.state = 0;
617 if (array.not_persistent==0 || tst->ss->external) {
618 int dfd;
619 if (dv->writemostly == 1)
620 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
621 dfd = open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
622 tst->ss->add_to_super(tst, &disc, dfd,
623 dv->devname);
624 /* write_init_super will close 'dfd' */
625 if (tst->ss->external)
626 /* mdmon will write the metadata */
627 close(dfd);
628 else if (tst->ss->write_init_super(tst))
629 return 1;
630 } else if (dv->re_add) {
631 /* this had better be raid1.
632 * As we are "--re-add"ing we must find a spare slot
633 * to fill.
634 */
635 char *used = malloc(array.raid_disks);
636 memset(used, 0, array.raid_disks);
637 for (j=0; j< tst->max_devs; j++) {
638 mdu_disk_info_t disc2;
639 disc2.number = j;
640 if (ioctl(fd, GET_DISK_INFO, &disc2))
641 continue;
642 if (disc2.major==0 && disc2.minor==0)
643 continue;
644 if (disc2.state & 8) /* removed */
645 continue;
646 if (disc2.raid_disk < 0)
647 continue;
648 if (disc2.raid_disk > array.raid_disks)
649 continue;
650 used[disc2.raid_disk] = 1;
651 }
652 for (j=0 ; j<array.raid_disks; j++)
653 if (!used[j]) {
654 disc.raid_disk = j;
655 disc.state |= (1<<MD_DISK_SYNC);
656 break;
657 }
658 }
659 if (dv->writemostly == 1)
660 disc.state |= (1 << MD_DISK_WRITEMOSTLY);
661 if (tst->ss->external) {
662 /* add a disk to an external metadata container
663 * only if mdmon is around to see it
664 */
665 struct mdinfo new_mdi;
666 struct mdinfo *sra;
667 int container_fd;
668 int devnum = fd2devnum(fd);
669
670 container_fd = open_dev_excl(devnum);
671 if (container_fd < 0) {
672 fprintf(stderr, Name ": add failed for %s:"
673 " could not get exclusive access to container\n",
674 dv->devname);
675 return 1;
676 }
677
678 if (!mdmon_running(devnum)) {
679 fprintf(stderr, Name ": add failed for %s: mdmon not running\n",
680 dv->devname);
681 close(container_fd);
682 return 1;
683 }
684
685 sra = sysfs_read(container_fd, -1, 0);
686 if (!sra) {
687 fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n",
688 dv->devname);
689 close(container_fd);
690 return 1;
691 }
692 sra->array.level = LEVEL_CONTAINER;
693 /* Need to set data_offset and component_size */
694 tst->ss->getinfo_super(tst, &new_mdi);
695 new_mdi.disk.major = disc.major;
696 new_mdi.disk.minor = disc.minor;
697 if (sysfs_add_disk(sra, &new_mdi) != 0) {
698 fprintf(stderr, Name ": add new device to external metadata"
699 " failed for %s\n", dv->devname);
700 close(container_fd);
701 return 1;
702 }
703 ping_monitor(devnum2devname(devnum));
704 sysfs_free(sra);
705 close(container_fd);
706 } else if (ioctl(fd, ADD_NEW_DISK, &disc)) {
707 fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
708 dv->devname, j, strerror(errno));
709 return 1;
710 }
711 if (verbose >= 0)
712 fprintf(stderr, Name ": added %s\n", dv->devname);
713 break;
714
715 case 'r':
716 /* hot remove */
717 if (tst->subarray[0]) {
718 fprintf(stderr, Name ": Cannot remove disks from a"
719 " \'member\' array, perform this"
720 " operation on the parent container\n");
721 return 1;
722 }
723 if (tst->ss->external) {
724 /* To remove a device from a container, we must
725 * check that it isn't in use in an array.
726 * This involves looking in the 'holders'
727 * directory - there must be just one entry,
728 * the container.
729 * To ensure that it doesn't get used as a
730 * hold spare while we are checking, we
731 * get an O_EXCL open on the container
732 */
733 int dnum = fd2devnum(fd);
734 lfd = open_dev_excl(dnum);
735 if (lfd < 0) {
736 fprintf(stderr, Name
737 ": Cannot get exclusive access "
738 " to container - odd\n");
739 return 1;
740 }
741 if (!sysfs_unique_holder(dnum, stb.st_rdev)) {
742 fprintf(stderr, Name
743 ": %s is %s, cannot remove.\n",
744 dnprintable,
745 errno == EEXIST ? "still in use":
746 "not a member");
747 close(lfd);
748 return 1;
749 }
750 }
751 /* FIXME check that it is a current member */
752 err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev);
753 if (err && errno == ENODEV) {
754 /* Old kernels rejected this if no personality
755 * registered */
756 struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS);
757 struct mdinfo *dv = NULL;
758 if (sra)
759 dv = sra->devs;
760 for ( ; dv ; dv=dv->next)
761 if (dv->disk.major == major(stb.st_rdev) &&
762 dv->disk.minor == minor(stb.st_rdev))
763 break;
764 if (dv)
765 err = sysfs_set_str(sra, dv,
766 "state", "remove");
767 else
768 err = -1;
769 if (sra)
770 sysfs_free(sra);
771 }
772 if (err) {
773 fprintf(stderr, Name ": hot remove failed "
774 "for %s: %s\n", dnprintable,
775 strerror(errno));
776 if (lfd >= 0)
777 close(lfd);
778 return 1;
779 }
780 if (tst->ss->external) {
781 /*
782 * Before dropping our exclusive open we make an
783 * attempt at preventing mdmon from seeing an
784 * 'add' event before reconciling this 'remove'
785 * event.
786 */
787 char *name = devnum2devname(fd2devnum(fd));
788
789 if (!name) {
790 fprintf(stderr, Name ": unable to get container name\n");
791 return 1;
792 }
793
794 ping_manager(name);
795 free(name);
796 }
797 close(lfd);
798 if (verbose >= 0)
799 fprintf(stderr, Name ": hot removed %s\n",
800 dnprintable);
801 break;
802
803 case 'f': /* set faulty */
804 /* FIXME check current member */
805 if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
806 fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
807 dnprintable, strerror(errno));
808 return 1;
809 }
810 if (verbose >= 0)
811 fprintf(stderr, Name ": set %s faulty in %s\n",
812 dnprintable, devname);
813 break;
814 }
815 }
816 return 0;
817
818 }
819
820 int autodetect(void)
821 {
822 /* Open any md device, and issue the RAID_AUTORUN ioctl */
823 int rv = 1;
824 int fd = dev_open("9:0", O_RDONLY);
825 if (fd >= 0) {
826 if (ioctl(fd, RAID_AUTORUN, 0) == 0)
827 rv = 0;
828 close(fd);
829 }
830 return rv;
831 }
832 #endif
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