]> git.ipfire.org Git - thirdparty/mdadm.git/blob - Manage.c
projects / thirdparty / mdadm.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Drop the superblock arg from all metadata methods.
[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
34 #define REGISTER_DEV _IO (MD_MAJOR, 1)
35 #define START_MD _IO (MD_MAJOR, 2)
36 #define STOP_MD _IO (MD_MAJOR, 3)
37
38 int Manage_ro(char *devname, int fd, int readonly)
39 {
40 /* switch to readonly or rw
41 *
42 * requires >= 0.90.0
43 * first check that array is runing
44 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
45 *
46 */
47 mdu_array_info_t array;
48
49 if (md_get_version(fd) < 9000) {
50 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
51 return 1;
52 }
53 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
54 fprintf(stderr, Name ": %s does not appear to be active.\n",
55 devname);
56 return 1;
57 }
58
59 if (readonly>0) {
60 if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
61 fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
62 devname, strerror(errno));
63 return 1;
64 }
65 } else if (readonly < 0) {
66 if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
67 fprintf(stderr, Name ": failed to set writable for %s: %s\n",
68 devname, strerror(errno));
69 return 1;
70 }
71 }
72 return 0;
73 }
74
75 #ifndef MDASSEMBLE
76
77 int Manage_runstop(char *devname, int fd, int runstop, int quiet)
78 {
79 /* Run or stop the array. array must already be configured
80 * required >= 0.90.0
81 */
82 mdu_param_t param; /* unused */
83
84 if (runstop == -1 && md_get_version(fd) < 9000) {
85 if (ioctl(fd, STOP_MD, 0)) {
86 if (!quiet) fprintf(stderr, Name ": stopping device %s failed: %s\n",
87 devname, strerror(errno));
88 return 1;
89 }
90 }
91
92 if (md_get_version(fd) < 9000) {
93 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
94 return 1;
95 }
96 /*
97 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
98 fprintf(stderr, Name ": %s does not appear to be active.\n",
99 devname);
100 return 1;
101 }
102 */
103 if (runstop>0) {
104 if (ioctl(fd, RUN_ARRAY, &param)) {
105 fprintf(stderr, Name ": failed to run array %s: %s\n",
106 devname, strerror(errno));
107 return 1;
108 }
109 if (quiet <= 0)
110 fprintf(stderr, Name ": started %s\n", devname);
111 } else if (runstop < 0){
112 struct map_ent *map = NULL;
113 struct stat stb;
114 if (ioctl(fd, STOP_ARRAY, NULL)) {
115 if (quiet==0)
116 fprintf(stderr, Name ": fail to stop array %s: %s\n",
117 devname, strerror(errno));
118 return 1;
119 }
120 if (quiet <= 0)
121 fprintf(stderr, Name ": stopped %s\n", devname);
122 if (fstat(fd, &stb) == 0) {
123 int devnum;
124 if (major(stb.st_rdev) == MD_MAJOR)
125 devnum = minor(stb.st_rdev);
126 else
127 devnum = -1-(minor(stb.st_rdev)>>6);
128 map_delete(&map, devnum);
129 map_write(map);
130 map_free(map);
131 }
132 }
133 return 0;
134 }
135
136 int Manage_resize(char *devname, int fd, long long size, int raid_disks)
137 {
138 mdu_array_info_t info;
139 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
140 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
141 devname, strerror(errno));
142 return 1;
143 }
144 if (size >= 0)
145 info.size = size;
146 if (raid_disks > 0)
147 info.raid_disks = raid_disks;
148 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
149 fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
150 devname, strerror(errno));
151 return 1;
152 }
153 return 0;
154 }
155
156 int Manage_reconfig(char *devname, int fd, int layout)
157 {
158 mdu_array_info_t info;
159 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
160 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
161 devname, strerror(errno));
162 return 1;
163 }
164 info.layout = layout;
165 printf("layout set to %d\n", info.layout);
166 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
167 fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
168 devname, strerror(errno));
169 return 1;
170 }
171 return 0;
172 }
173
174 int Manage_subdevs(char *devname, int fd,
175 mddev_dev_t devlist, int verbose)
176 {
177 /* do something to each dev.
178 * devmode can be
179 * 'a' - add the device
180 * try HOT_ADD_DISK
181 * If that fails EINVAL, try ADD_NEW_DISK
182 * 'r' - remove the device HOT_REMOVE_DISK
183 * device can be 'faulty' or 'detached' in which case all
184 * matching devices are removed.
185 * 'f' - set the device faulty SET_DISK_FAULTY
186 * device can be 'detached' in which case any device that
187 * is inaccessible will be marked faulty.
188 */
189 mdu_array_info_t array;
190 mdu_disk_info_t disc;
191 mddev_dev_t dv, next = NULL;
192 struct stat stb;
193 int j, jnext = 0;
194 int tfd;
195 struct supertype *st, *tst;
196 int duuid[4];
197 int ouuid[4];
198
199 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
200 fprintf(stderr, Name ": cannot get array info for %s\n",
201 devname);
202 return 1;
203 }
204
205 tst = super_by_version(array.major_version,
206 array.minor_version);
207 if (!tst) {
208 fprintf(stderr, Name ": unsupport array - version %d.%d\n",
209 array.major_version, array.minor_version);
210 return 1;
211 }
212
213 for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
214 unsigned long long ldsize;
215 char dvname[20];
216 char *dnprintable = dv->devname;
217
218 next = dv->next;
219 jnext = 0;
220
221 if (strcmp(dv->devname, "failed")==0 ||
222 strcmp(dv->devname, "faulty")==0) {
223 if (dv->disposition != 'r') {
224 fprintf(stderr, Name ": %s only meaningful "
225 "with -r, not -%c\n",
226 dv->devname, dv->disposition);
227 return 1;
228 }
229 for (; j < array.raid_disks + array.nr_disks ; j++) {
230 disc.number = j;
231 if (ioctl(fd, GET_DISK_INFO, &disc))
232 continue;
233 if (disc.major == 0 && disc.minor == 0)
234 continue;
235 if ((disc.state & 1) == 0) /* faulty */
236 continue;
237 stb.st_rdev = makedev(disc.major, disc.minor);
238 next = dv;
239 jnext = j+1;
240 sprintf(dvname,"%d:%d", disc.major, disc.minor);
241 dnprintable = dvname;
242 break;
243 }
244 if (jnext == 0)
245 continue;
246 } else if (strcmp(dv->devname, "detached") == 0) {
247 if (dv->disposition != 'r' && dv->disposition != 'f') {
248 fprintf(stderr, Name ": %s only meaningful "
249 "with -r of -f, not -%c\n",
250 dv->devname, dv->disposition);
251 return 1;
252 }
253 for (; j < array.raid_disks + array.nr_disks; j++) {
254 int sfd;
255 disc.number = j;
256 if (ioctl(fd, GET_DISK_INFO, &disc))
257 continue;
258 if (disc.major == 0 && disc.minor == 0)
259 continue;
260 sprintf(dvname,"%d:%d", disc.major, disc.minor);
261 sfd = dev_open(dvname, O_RDONLY);
262 if (sfd >= 0) {
263 close(sfd);
264 continue;
265 }
266 if (dv->disposition == 'f' &&
267 (disc.state & 1) == 1) /* already faulty */
268 continue;
269 if (errno != ENXIO)
270 continue;
271 stb.st_rdev = makedev(disc.major, disc.minor);
272 next = dv;
273 jnext = j+1;
274 dnprintable = dvname;
275 break;
276 }
277 if (jnext == 0)
278 continue;
279 } else {
280 j = 0;
281
282 if (stat(dv->devname, &stb)) {
283 fprintf(stderr, Name ": cannot find %s: %s\n",
284 dv->devname, strerror(errno));
285 return 1;
286 }
287 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
288 fprintf(stderr, Name ": %s is not a "
289 "block device.\n",
290 dv->devname);
291 return 1;
292 }
293 }
294 switch(dv->disposition){
295 default:
296 fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
297 dv->devname, dv->disposition);
298 return 1;
299 case 'a':
300 /* add the device */
301
302 /* Make sure it isn't in use (in 2.6 or later) */
303 tfd = open(dv->devname, O_RDONLY|O_EXCL);
304 if (tfd < 0) {
305 fprintf(stderr, Name ": Cannot open %s: %s\n",
306 dv->devname, strerror(errno));
307 return 1;
308 }
309 remove_partitions(tfd);
310
311 st = super_by_version(array.major_version,
312 array.minor_version);
313
314 if (array.not_persistent==0)
315 st->ss->load_super(st, tfd, NULL);
316
317 if (!get_dev_size(tfd, dv->devname, &ldsize)) {
318 close(tfd);
319 return 1;
320 }
321 close(tfd);
322
323 if (array.major_version == 0 &&
324 md_get_version(fd)%100 < 2) {
325 if (ioctl(fd, HOT_ADD_DISK,
326 (unsigned long)stb.st_rdev)==0) {
327 if (verbose >= 0)
328 fprintf(stderr, Name ": hot added %s\n",
329 dv->devname);
330 continue;
331 }
332
333 fprintf(stderr, Name ": hot add failed for %s: %s\n",
334 dv->devname, strerror(errno));
335 return 1;
336 }
337
338 if (array.not_persistent == 0) {
339
340 /* Make sure device is large enough */
341 if (tst->ss->avail_size(tst, ldsize/512) <
342 array.size) {
343 fprintf(stderr, Name ": %s not large enough to join array\n",
344 dv->devname);
345 return 1;
346 }
347
348 /* need to find a sample superblock to copy, and
349 * a spare slot to use
350 */
351 for (j = 0; j < tst->max_devs; j++) {
352 char *dev;
353 int dfd;
354 disc.number = j;
355 if (ioctl(fd, GET_DISK_INFO, &disc))
356 continue;
357 if (disc.major==0 && disc.minor==0)
358 continue;
359 if ((disc.state & 4)==0) continue; /* sync */
360 /* Looks like a good device to try */
361 dev = map_dev(disc.major, disc.minor, 1);
362 if (!dev) continue;
363 dfd = dev_open(dev, O_RDONLY);
364 if (dfd < 0) continue;
365 if (tst->ss->load_super(tst, dfd,
366 NULL)) {
367 close(dfd);
368 continue;
369 }
370 close(dfd);
371 break;
372 }
373 if (!tst->sb) {
374 fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n");
375 return 1;
376 }
377 /* Possibly this device was recently part of the array
378 * and was temporarily removed, and is now being re-added.
379 * If so, we can simply re-add it.
380 */
381 tst->ss->uuid_from_super(tst, duuid);
382
383 /* re-add doesn't work for version-1 superblocks
384 * before 2.6.18 :-(
385 */
386 if (array.major_version == 1 &&
387 get_linux_version() <= 2006018)
388 ;
389 else if (st->sb) {
390 st->ss->uuid_from_super(st, ouuid);
391 if (memcmp(duuid, ouuid, sizeof(ouuid))==0) {
392 /* looks close enough for now. Kernel
393 * will worry about whether a bitmap
394 * based reconstruction is possible.
395 */
396 struct mdinfo mdi;
397 st->ss->getinfo_super(st, &mdi);
398 disc.major = major(stb.st_rdev);
399 disc.minor = minor(stb.st_rdev);
400 disc.number = mdi.disk.number;
401 disc.raid_disk = mdi.disk.raid_disk;
402 disc.state = mdi.disk.state;
403 if (dv->writemostly)
404 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
405 if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
406 if (verbose >= 0)
407 fprintf(stderr, Name ": re-added %s\n", dv->devname);
408 continue;
409 }
410 /* fall back on normal-add */
411 }
412 }
413 } else {
414 /* non-persistent. Must ensure that new drive
415 * is at least array.size big.
416 */
417 if (ldsize/512 < array.size) {
418 fprintf(stderr, Name ": %s not large enough to join array\n",
419 dv->devname);
420 return 1;
421 }
422 }
423 /* in 2.6.17 and earlier, version-1 superblocks won't
424 * use the number we write, but will choose a free number.
425 * we must choose the same free number, which requires
426 * starting at 'raid_disks' and counting up
427 */
428 for (j = array.raid_disks; j< tst->max_devs; j++) {
429 disc.number = j;
430 if (ioctl(fd, GET_DISK_INFO, &disc))
431 break;
432 if (disc.major==0 && disc.minor==0)
433 break;
434 if (disc.state & 8) /* removed */
435 break;
436 }
437 disc.major = major(stb.st_rdev);
438 disc.minor = minor(stb.st_rdev);
439 disc.number =j;
440 disc.state = 0;
441 if (array.not_persistent==0) {
442 if (dv->writemostly)
443 disc.state |= 1 << MD_DISK_WRITEMOSTLY;
444 tst->ss->add_to_super(tst, &disc);
445 if (tst->ss->write_init_super(tst, &disc,
446 dv->devname))
447 return 1;
448 } else if (dv->re_add) {
449 /* this had better be raid1.
450 * As we are "--re-add"ing we must find a spare slot
451 * to fill.
452 */
453 char *used = malloc(array.raid_disks);
454 memset(used, 0, array.raid_disks);
455 for (j=0; j< tst->max_devs; j++) {
456 mdu_disk_info_t disc2;
457 disc2.number = j;
458 if (ioctl(fd, GET_DISK_INFO, &disc2))
459 continue;
460 if (disc2.major==0 && disc2.minor==0)
461 continue;
462 if (disc2.state & 8) /* removed */
463 continue;
464 if (disc2.raid_disk < 0)
465 continue;
466 if (disc2.raid_disk > array.raid_disks)
467 continue;
468 used[disc2.raid_disk] = 1;
469 }
470 for (j=0 ; j<array.raid_disks; j++)
471 if (!used[j]) {
472 disc.raid_disk = j;
473 disc.state |= (1<<MD_DISK_SYNC);
474 break;
475 }
476 }
477 if (dv->writemostly)
478 disc.state |= (1 << MD_DISK_WRITEMOSTLY);
479 if (ioctl(fd,ADD_NEW_DISK, &disc)) {
480 fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
481 dv->devname, j, strerror(errno));
482 return 1;
483 }
484 if (verbose >= 0)
485 fprintf(stderr, Name ": added %s\n", dv->devname);
486 break;
487
488 case 'r':
489 /* hot remove */
490 /* FIXME check that it is a current member */
491 if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
492 fprintf(stderr, Name ": hot remove failed "
493 "for %s: %s\n", dnprintable,
494 strerror(errno));
495 return 1;
496 }
497 if (verbose >= 0)
498 fprintf(stderr, Name ": hot removed %s\n",
499 dnprintable);
500 break;
501
502 case 'f': /* set faulty */
503 /* FIXME check current member */
504 if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
505 fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
506 dnprintable, strerror(errno));
507 return 1;
508 }
509 if (verbose >= 0)
510 fprintf(stderr, Name ": set %s faulty in %s\n",
511 dnprintable, devname);
512 break;
513 }
514 }
515 return 0;
516
517 }
518
519 int autodetect(void)
520 {
521 /* Open any md device, and issue the RAID_AUTORUN ioctl */
522 int rv = 1;
523 int fd = dev_open("9:0", O_RDONLY);
524 if (fd >= 0) {
525 if (ioctl(fd, RAID_AUTORUN, 0) == 0)
526 rv = 0;
527 close(fd);
528 }
529 return rv;
530 }
531 #endif
Unnamed repository; edit this file 'description' to name the repository.