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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, ¶m)) { | |
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 | map_lock(&map); | |
302 | map_remove(&map, devnum); | |
303 | map_unlock(&map); | |
304 | } | |
305 | return 0; | |
306 | } | |
307 | ||
308 | int Manage_resize(char *devname, int fd, long long size, int raid_disks) | |
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 | if (size >= 0) | |
317 | info.size = size; | |
318 | if (raid_disks > 0) | |
319 | info.raid_disks = raid_disks; | |
320 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
321 | fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n", | |
322 | devname, strerror(errno)); | |
323 | return 1; | |
324 | } | |
325 | return 0; | |
326 | } | |
327 | ||
328 | int Manage_subdevs(char *devname, int fd, | |
329 | mddev_dev_t devlist, int verbose) | |
330 | { | |
331 | /* do something to each dev. | |
332 | * devmode can be | |
333 | * 'a' - add the device | |
334 | * try HOT_ADD_DISK | |
335 | * If that fails EINVAL, try ADD_NEW_DISK | |
336 | * 'r' - remove the device HOT_REMOVE_DISK | |
337 | * device can be 'faulty' or 'detached' in which case all | |
338 | * matching devices are removed. | |
339 | * 'f' - set the device faulty SET_DISK_FAULTY | |
340 | * device can be 'detached' in which case any device that | |
341 | * is inaccessible will be marked faulty. | |
342 | */ | |
343 | mdu_array_info_t array; | |
344 | mdu_disk_info_t disc; | |
345 | unsigned long long array_size; | |
346 | mddev_dev_t dv, next = NULL; | |
347 | struct stat stb; | |
348 | int j, jnext = 0; | |
349 | int tfd; | |
350 | struct supertype *st, *tst; | |
351 | int duuid[4]; | |
352 | int ouuid[4]; | |
353 | int lfd = -1; | |
354 | ||
355 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
356 | fprintf(stderr, Name ": cannot get array info for %s\n", | |
357 | devname); | |
358 | return 1; | |
359 | } | |
360 | ||
361 | /* array.size is only 32 bit and may be truncated. | |
362 | * So read from sysfs if possible, and record number of sectors | |
363 | */ | |
364 | ||
365 | array_size = get_component_size(fd); | |
366 | if (array_size <= 0) | |
367 | array_size = array.size * 2; | |
368 | ||
369 | tst = super_by_fd(fd); | |
370 | if (!tst) { | |
371 | fprintf(stderr, Name ": unsupport array - version %d.%d\n", | |
372 | array.major_version, array.minor_version); | |
373 | return 1; | |
374 | } | |
375 | ||
376 | for (dv = devlist, j=0 ; dv; dv = next, j = jnext) { | |
377 | unsigned long long ldsize; | |
378 | char dvname[20]; | |
379 | char *dnprintable = dv->devname; | |
380 | int err; | |
381 | ||
382 | next = dv->next; | |
383 | jnext = 0; | |
384 | ||
385 | if (strcmp(dv->devname, "failed")==0 || | |
386 | strcmp(dv->devname, "faulty")==0) { | |
387 | if (dv->disposition != 'r') { | |
388 | fprintf(stderr, Name ": %s only meaningful " | |
389 | "with -r, not -%c\n", | |
390 | dv->devname, dv->disposition); | |
391 | return 1; | |
392 | } | |
393 | for (; j < array.raid_disks + array.nr_disks ; j++) { | |
394 | disc.number = j; | |
395 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
396 | continue; | |
397 | if (disc.major == 0 && disc.minor == 0) | |
398 | continue; | |
399 | if ((disc.state & 1) == 0) /* faulty */ | |
400 | continue; | |
401 | stb.st_rdev = makedev(disc.major, disc.minor); | |
402 | next = dv; | |
403 | jnext = j+1; | |
404 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
405 | dnprintable = dvname; | |
406 | break; | |
407 | } | |
408 | if (jnext == 0) | |
409 | continue; | |
410 | } else if (strcmp(dv->devname, "detached") == 0) { | |
411 | if (dv->disposition != 'r' && dv->disposition != 'f') { | |
412 | fprintf(stderr, Name ": %s only meaningful " | |
413 | "with -r of -f, not -%c\n", | |
414 | dv->devname, dv->disposition); | |
415 | return 1; | |
416 | } | |
417 | for (; j < array.raid_disks + array.nr_disks; j++) { | |
418 | int sfd; | |
419 | disc.number = j; | |
420 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
421 | continue; | |
422 | if (disc.major == 0 && disc.minor == 0) | |
423 | continue; | |
424 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
425 | sfd = dev_open(dvname, O_RDONLY); | |
426 | if (sfd >= 0) { | |
427 | close(sfd); | |
428 | continue; | |
429 | } | |
430 | if (dv->disposition == 'f' && | |
431 | (disc.state & 1) == 1) /* already faulty */ | |
432 | continue; | |
433 | if (errno != ENXIO) | |
434 | continue; | |
435 | stb.st_rdev = makedev(disc.major, disc.minor); | |
436 | next = dv; | |
437 | jnext = j+1; | |
438 | dnprintable = dvname; | |
439 | break; | |
440 | } | |
441 | if (jnext == 0) | |
442 | continue; | |
443 | } else { | |
444 | j = 0; | |
445 | ||
446 | tfd = dev_open(dv->devname, O_RDONLY); | |
447 | if (tfd < 0 && dv->disposition == 'r' && | |
448 | lstat(dv->devname, &stb) == 0) | |
449 | /* Be happy, the lstat worked, that is | |
450 | * enough for --remove | |
451 | */ | |
452 | ; | |
453 | else { | |
454 | if (tfd < 0 || fstat(tfd, &stb) != 0) { | |
455 | fprintf(stderr, Name ": cannot find %s: %s\n", | |
456 | dv->devname, strerror(errno)); | |
457 | if (tfd >= 0) | |
458 | close(tfd); | |
459 | return 1; | |
460 | } | |
461 | close(tfd); | |
462 | } | |
463 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
464 | fprintf(stderr, Name ": %s is not a " | |
465 | "block device.\n", | |
466 | dv->devname); | |
467 | return 1; | |
468 | } | |
469 | } | |
470 | switch(dv->disposition){ | |
471 | default: | |
472 | fprintf(stderr, Name ": internal error - devmode[%s]=%d\n", | |
473 | dv->devname, dv->disposition); | |
474 | return 1; | |
475 | case 'a': | |
476 | /* add the device */ | |
477 | if (tst->subarray[0]) { | |
478 | fprintf(stderr, Name ": Cannot add disks to a" | |
479 | " \'member\' array, perform this" | |
480 | " operation on the parent container\n"); | |
481 | return 1; | |
482 | } | |
483 | /* Make sure it isn't in use (in 2.6 or later) */ | |
484 | tfd = dev_open(dv->devname, O_RDONLY|O_EXCL|O_DIRECT); | |
485 | if (tfd < 0) { | |
486 | fprintf(stderr, Name ": Cannot open %s: %s\n", | |
487 | dv->devname, strerror(errno)); | |
488 | return 1; | |
489 | } | |
490 | remove_partitions(tfd); | |
491 | ||
492 | st = dup_super(tst); | |
493 | ||
494 | if (array.not_persistent==0) | |
495 | st->ss->load_super(st, tfd, NULL); | |
496 | ||
497 | if (!get_dev_size(tfd, dv->devname, &ldsize)) { | |
498 | close(tfd); | |
499 | return 1; | |
500 | } | |
501 | close(tfd); | |
502 | ||
503 | ||
504 | if (!tst->ss->external && | |
505 | array.major_version == 0 && | |
506 | md_get_version(fd)%100 < 2) { | |
507 | if (ioctl(fd, HOT_ADD_DISK, | |
508 | (unsigned long)stb.st_rdev)==0) { | |
509 | if (verbose >= 0) | |
510 | fprintf(stderr, Name ": hot added %s\n", | |
511 | dv->devname); | |
512 | continue; | |
513 | } | |
514 | ||
515 | fprintf(stderr, Name ": hot add failed for %s: %s\n", | |
516 | dv->devname, strerror(errno)); | |
517 | return 1; | |
518 | } | |
519 | ||
520 | if (array.not_persistent == 0 || tst->ss->external) { | |
521 | ||
522 | /* need to find a sample superblock to copy, and | |
523 | * a spare slot to use. | |
524 | * For 'external' array (well, container based), | |
525 | * We can just load the metadata for the array. | |
526 | */ | |
527 | if (tst->ss->external) { | |
528 | tst->ss->load_super(tst, fd, NULL); | |
529 | } else for (j = 0; j < tst->max_devs; j++) { | |
530 | char *dev; | |
531 | int dfd; | |
532 | disc.number = j; | |
533 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
534 | continue; | |
535 | if (disc.major==0 && disc.minor==0) | |
536 | continue; | |
537 | if ((disc.state & 4)==0) continue; /* sync */ | |
538 | /* Looks like a good device to try */ | |
539 | dev = map_dev(disc.major, disc.minor, 1); | |
540 | if (!dev) continue; | |
541 | dfd = dev_open(dev, O_RDONLY); | |
542 | if (dfd < 0) continue; | |
543 | if (tst->ss->load_super(tst, dfd, | |
544 | NULL)) { | |
545 | close(dfd); | |
546 | continue; | |
547 | } | |
548 | close(dfd); | |
549 | break; | |
550 | } | |
551 | /* FIXME this is a bad test to be using */ | |
552 | if (!tst->sb) { | |
553 | fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n"); | |
554 | return 1; | |
555 | } | |
556 | ||
557 | /* Make sure device is large enough */ | |
558 | if (tst->ss->avail_size(tst, ldsize/512) < | |
559 | array_size) { | |
560 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
561 | dv->devname); | |
562 | return 1; | |
563 | } | |
564 | ||
565 | /* Possibly this device was recently part of the array | |
566 | * and was temporarily removed, and is now being re-added. | |
567 | * If so, we can simply re-add it. | |
568 | */ | |
569 | tst->ss->uuid_from_super(tst, duuid); | |
570 | ||
571 | /* re-add doesn't work for version-1 superblocks | |
572 | * before 2.6.18 :-( | |
573 | */ | |
574 | if (array.major_version == 1 && | |
575 | get_linux_version() <= 2006018) | |
576 | ; | |
577 | else if (st->sb) { | |
578 | st->ss->uuid_from_super(st, ouuid); | |
579 | if (memcmp(duuid, ouuid, sizeof(ouuid))==0) { | |
580 | /* looks close enough for now. Kernel | |
581 | * will worry about whether a bitmap | |
582 | * based reconstruction is possible. | |
583 | */ | |
584 | struct mdinfo mdi; | |
585 | st->ss->getinfo_super(st, &mdi); | |
586 | disc.major = major(stb.st_rdev); | |
587 | disc.minor = minor(stb.st_rdev); | |
588 | disc.number = mdi.disk.number; | |
589 | disc.raid_disk = mdi.disk.raid_disk; | |
590 | disc.state = mdi.disk.state; | |
591 | if (dv->writemostly == 1) | |
592 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
593 | if (dv->writemostly == 2) | |
594 | disc.state &= ~(1 << MD_DISK_WRITEMOSTLY); | |
595 | /* don't even try if disk is marked as faulty */ | |
596 | errno = 0; | |
597 | if ((disc.state & 1) == 0 && | |
598 | ioctl(fd, ADD_NEW_DISK, &disc) == 0) { | |
599 | if (verbose >= 0) | |
600 | fprintf(stderr, Name ": re-added %s\n", dv->devname); | |
601 | continue; | |
602 | } | |
603 | if (errno == ENOMEM || errno == EROFS) { | |
604 | fprintf(stderr, Name ": add new device failed for %s: %s\n", | |
605 | dv->devname, strerror(errno)); | |
606 | return 1; | |
607 | } | |
608 | /* fall back on normal-add */ | |
609 | } | |
610 | } | |
611 | if (dv->re_add) { | |
612 | fprintf(stderr, Name | |
613 | ": --re-add for %s to %s is not possible\n", | |
614 | dv->devname, devname); | |
615 | return 1; | |
616 | } | |
617 | } else { | |
618 | /* non-persistent. Must ensure that new drive | |
619 | * is at least array.size big. | |
620 | */ | |
621 | if (ldsize/512 < array_size) { | |
622 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
623 | dv->devname); | |
624 | return 1; | |
625 | } | |
626 | } | |
627 | /* in 2.6.17 and earlier, version-1 superblocks won't | |
628 | * use the number we write, but will choose a free number. | |
629 | * we must choose the same free number, which requires | |
630 | * starting at 'raid_disks' and counting up | |
631 | */ | |
632 | for (j = array.raid_disks; j< tst->max_devs; j++) { | |
633 | disc.number = j; | |
634 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
635 | break; | |
636 | if (disc.major==0 && disc.minor==0) | |
637 | break; | |
638 | if (disc.state & 8) /* removed */ | |
639 | break; | |
640 | } | |
641 | disc.major = major(stb.st_rdev); | |
642 | disc.minor = minor(stb.st_rdev); | |
643 | disc.number =j; | |
644 | disc.state = 0; | |
645 | if (array.not_persistent==0 || tst->ss->external) { | |
646 | int dfd; | |
647 | if (dv->writemostly == 1) | |
648 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
649 | dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT); | |
650 | if (tst->ss->add_to_super(tst, &disc, dfd, | |
651 | dv->devname)) { | |
652 | close(dfd); | |
653 | return 1; | |
654 | } | |
655 | /* write_init_super will close 'dfd' */ | |
656 | if (tst->ss->external) | |
657 | /* mdmon will write the metadata */ | |
658 | close(dfd); | |
659 | else if (tst->ss->write_init_super(tst)) | |
660 | return 1; | |
661 | } else if (dv->re_add) { | |
662 | /* this had better be raid1. | |
663 | * As we are "--re-add"ing we must find a spare slot | |
664 | * to fill. | |
665 | */ | |
666 | char *used = malloc(array.raid_disks); | |
667 | memset(used, 0, array.raid_disks); | |
668 | for (j=0; j< tst->max_devs; j++) { | |
669 | mdu_disk_info_t disc2; | |
670 | disc2.number = j; | |
671 | if (ioctl(fd, GET_DISK_INFO, &disc2)) | |
672 | continue; | |
673 | if (disc2.major==0 && disc2.minor==0) | |
674 | continue; | |
675 | if (disc2.state & 8) /* removed */ | |
676 | continue; | |
677 | if (disc2.raid_disk < 0) | |
678 | continue; | |
679 | if (disc2.raid_disk > array.raid_disks) | |
680 | continue; | |
681 | used[disc2.raid_disk] = 1; | |
682 | } | |
683 | for (j=0 ; j<array.raid_disks; j++) | |
684 | if (!used[j]) { | |
685 | disc.raid_disk = j; | |
686 | disc.state |= (1<<MD_DISK_SYNC); | |
687 | break; | |
688 | } | |
689 | free(used); | |
690 | } | |
691 | if (dv->writemostly == 1) | |
692 | disc.state |= (1 << MD_DISK_WRITEMOSTLY); | |
693 | if (tst->ss->external) { | |
694 | /* add a disk to an external metadata container | |
695 | * only if mdmon is around to see it | |
696 | */ | |
697 | struct mdinfo new_mdi; | |
698 | struct mdinfo *sra; | |
699 | int container_fd; | |
700 | int devnum = fd2devnum(fd); | |
701 | ||
702 | container_fd = open_dev_excl(devnum); | |
703 | if (container_fd < 0) { | |
704 | fprintf(stderr, Name ": add failed for %s:" | |
705 | " could not get exclusive access to container\n", | |
706 | dv->devname); | |
707 | return 1; | |
708 | } | |
709 | ||
710 | if (!mdmon_running(devnum)) { | |
711 | fprintf(stderr, Name ": add failed for %s: mdmon not running\n", | |
712 | dv->devname); | |
713 | close(container_fd); | |
714 | return 1; | |
715 | } | |
716 | ||
717 | sra = sysfs_read(container_fd, -1, 0); | |
718 | if (!sra) { | |
719 | fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n", | |
720 | dv->devname); | |
721 | close(container_fd); | |
722 | return 1; | |
723 | } | |
724 | sra->array.level = LEVEL_CONTAINER; | |
725 | /* Need to set data_offset and component_size */ | |
726 | tst->ss->getinfo_super(tst, &new_mdi); | |
727 | new_mdi.disk.major = disc.major; | |
728 | new_mdi.disk.minor = disc.minor; | |
729 | new_mdi.recovery_start = 0; | |
730 | if (sysfs_add_disk(sra, &new_mdi, 0) != 0) { | |
731 | fprintf(stderr, Name ": add new device to external metadata" | |
732 | " failed for %s\n", dv->devname); | |
733 | close(container_fd); | |
734 | return 1; | |
735 | } | |
736 | ping_monitor(devnum2devname(devnum)); | |
737 | sysfs_free(sra); | |
738 | close(container_fd); | |
739 | } else if (ioctl(fd, ADD_NEW_DISK, &disc)) { | |
740 | fprintf(stderr, Name ": add new device failed for %s as %d: %s\n", | |
741 | dv->devname, j, strerror(errno)); | |
742 | return 1; | |
743 | } | |
744 | if (verbose >= 0) | |
745 | fprintf(stderr, Name ": added %s\n", dv->devname); | |
746 | break; | |
747 | ||
748 | case 'r': | |
749 | /* hot remove */ | |
750 | if (tst->subarray[0]) { | |
751 | fprintf(stderr, Name ": Cannot remove disks from a" | |
752 | " \'member\' array, perform this" | |
753 | " operation on the parent container\n"); | |
754 | return 1; | |
755 | } | |
756 | if (tst->ss->external) { | |
757 | /* To remove a device from a container, we must | |
758 | * check that it isn't in use in an array. | |
759 | * This involves looking in the 'holders' | |
760 | * directory - there must be just one entry, | |
761 | * the container. | |
762 | * To ensure that it doesn't get used as a | |
763 | * hold spare while we are checking, we | |
764 | * get an O_EXCL open on the container | |
765 | */ | |
766 | int dnum = fd2devnum(fd); | |
767 | lfd = open_dev_excl(dnum); | |
768 | if (lfd < 0) { | |
769 | fprintf(stderr, Name | |
770 | ": Cannot get exclusive access " | |
771 | " to container - odd\n"); | |
772 | return 1; | |
773 | } | |
774 | /* in the detached case it is not possible to | |
775 | * check if we are the unique holder, so just | |
776 | * rely on the 'detached' checks | |
777 | */ | |
778 | if (strcmp(dv->devname, "detached") == 0 || | |
779 | sysfs_unique_holder(dnum, stb.st_rdev)) | |
780 | /* pass */; | |
781 | else { | |
782 | fprintf(stderr, Name | |
783 | ": %s is %s, cannot remove.\n", | |
784 | dnprintable, | |
785 | errno == EEXIST ? "still in use": | |
786 | "not a member"); | |
787 | close(lfd); | |
788 | return 1; | |
789 | } | |
790 | } | |
791 | /* FIXME check that it is a current member */ | |
792 | err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev); | |
793 | if (err && errno == ENODEV) { | |
794 | /* Old kernels rejected this if no personality | |
795 | * registered */ | |
796 | struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS); | |
797 | struct mdinfo *dv = NULL; | |
798 | if (sra) | |
799 | dv = sra->devs; | |
800 | for ( ; dv ; dv=dv->next) | |
801 | if (dv->disk.major == major(stb.st_rdev) && | |
802 | dv->disk.minor == minor(stb.st_rdev)) | |
803 | break; | |
804 | if (dv) | |
805 | err = sysfs_set_str(sra, dv, | |
806 | "state", "remove"); | |
807 | else | |
808 | err = -1; | |
809 | if (sra) | |
810 | sysfs_free(sra); | |
811 | } | |
812 | if (err) { | |
813 | fprintf(stderr, Name ": hot remove failed " | |
814 | "for %s: %s\n", dnprintable, | |
815 | strerror(errno)); | |
816 | if (lfd >= 0) | |
817 | close(lfd); | |
818 | return 1; | |
819 | } | |
820 | if (tst->ss->external) { | |
821 | /* | |
822 | * Before dropping our exclusive open we make an | |
823 | * attempt at preventing mdmon from seeing an | |
824 | * 'add' event before reconciling this 'remove' | |
825 | * event. | |
826 | */ | |
827 | char *name = devnum2devname(fd2devnum(fd)); | |
828 | ||
829 | if (!name) { | |
830 | fprintf(stderr, Name ": unable to get container name\n"); | |
831 | return 1; | |
832 | } | |
833 | ||
834 | ping_manager(name); | |
835 | free(name); | |
836 | } | |
837 | close(lfd); | |
838 | if (verbose >= 0) | |
839 | fprintf(stderr, Name ": hot removed %s\n", | |
840 | dnprintable); | |
841 | break; | |
842 | ||
843 | case 'f': /* set faulty */ | |
844 | /* FIXME check current member */ | |
845 | if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) { | |
846 | fprintf(stderr, Name ": set device faulty failed for %s: %s\n", | |
847 | dnprintable, strerror(errno)); | |
848 | return 1; | |
849 | } | |
850 | if (verbose >= 0) | |
851 | fprintf(stderr, Name ": set %s faulty in %s\n", | |
852 | dnprintable, devname); | |
853 | break; | |
854 | } | |
855 | } | |
856 | return 0; | |
857 | ||
858 | } | |
859 | ||
860 | int autodetect(void) | |
861 | { | |
862 | /* Open any md device, and issue the RAID_AUTORUN ioctl */ | |
863 | int rv = 1; | |
864 | int fd = dev_open("9:0", O_RDONLY); | |
865 | if (fd >= 0) { | |
866 | if (ioctl(fd, RAID_AUTORUN, 0) == 0) | |
867 | rv = 0; | |
868 | close(fd); | |
869 | } | |
870 | return rv; | |
871 | } | |
872 | #endif |