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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 | #ifndef MDASSEMBLE | |
49 | struct mdinfo *mdi; | |
50 | #endif | |
51 | ||
52 | if (md_get_version(fd) < 9000) { | |
53 | fprintf(stderr, Name ": need md driver version 0.90.0 or later\n"); | |
54 | return 1; | |
55 | } | |
56 | #ifndef MDASSEMBLE | |
57 | /* If this is an externally-manage array, we need to modify the | |
58 | * metadata_version so that mdmon doesn't undo our change. | |
59 | */ | |
60 | mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION); | |
61 | if (mdi && | |
62 | mdi->array.major_version == -1 && | |
63 | mdi->array.level > 0 && | |
64 | is_subarray(mdi->text_version)) { | |
65 | char vers[64]; | |
66 | strcpy(vers, "external:"); | |
67 | strcat(vers, mdi->text_version); | |
68 | if (readonly > 0) { | |
69 | int rv; | |
70 | /* We set readonly ourselves. */ | |
71 | vers[9] = '-'; | |
72 | sysfs_set_str(mdi, NULL, "metadata_version", vers); | |
73 | ||
74 | close(fd); | |
75 | rv = sysfs_set_str(mdi, NULL, "array_state", "readonly"); | |
76 | ||
77 | if (rv < 0) { | |
78 | fprintf(stderr, Name ": failed to set readonly for %s: %s\n", | |
79 | devname, strerror(errno)); | |
80 | ||
81 | vers[9] = mdi->text_version[0]; | |
82 | sysfs_set_str(mdi, NULL, "metadata_version", vers); | |
83 | return 1; | |
84 | } | |
85 | } else { | |
86 | char *cp; | |
87 | /* We cannot set read/write - must signal mdmon */ | |
88 | vers[9] = '/'; | |
89 | sysfs_set_str(mdi, NULL, "metadata_version", vers); | |
90 | ||
91 | cp = strchr(vers+10, '/'); | |
92 | if (*cp) | |
93 | *cp = 0; | |
94 | ping_monitor(vers+10); | |
95 | } | |
96 | return 0; | |
97 | } | |
98 | #endif | |
99 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
100 | fprintf(stderr, Name ": %s does not appear to be active.\n", | |
101 | devname); | |
102 | return 1; | |
103 | } | |
104 | ||
105 | if (readonly>0) { | |
106 | if (ioctl(fd, STOP_ARRAY_RO, NULL)) { | |
107 | fprintf(stderr, Name ": failed to set readonly for %s: %s\n", | |
108 | devname, strerror(errno)); | |
109 | return 1; | |
110 | } | |
111 | } else if (readonly < 0) { | |
112 | if (ioctl(fd, RESTART_ARRAY_RW, NULL)) { | |
113 | fprintf(stderr, Name ": failed to set writable for %s: %s\n", | |
114 | devname, strerror(errno)); | |
115 | return 1; | |
116 | } | |
117 | } | |
118 | return 0; | |
119 | } | |
120 | ||
121 | #ifndef MDASSEMBLE | |
122 | ||
123 | int Manage_runstop(char *devname, int fd, int runstop, int quiet) | |
124 | { | |
125 | /* Run or stop the array. array must already be configured | |
126 | * required >= 0.90.0 | |
127 | * Only print failure messages if quiet == 0; | |
128 | * quiet > 0 means really be quiet | |
129 | * quiet < 0 means we will try again if it fails. | |
130 | */ | |
131 | mdu_param_t param; /* unused */ | |
132 | ||
133 | if (runstop == -1 && md_get_version(fd) < 9000) { | |
134 | if (ioctl(fd, STOP_MD, 0)) { | |
135 | if (quiet == 0) fprintf(stderr, | |
136 | Name ": stopping device %s " | |
137 | "failed: %s\n", | |
138 | devname, strerror(errno)); | |
139 | return 1; | |
140 | } | |
141 | } | |
142 | ||
143 | if (md_get_version(fd) < 9000) { | |
144 | fprintf(stderr, Name ": need md driver version 0.90.0 or later\n"); | |
145 | return 1; | |
146 | } | |
147 | /* | |
148 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
149 | fprintf(stderr, Name ": %s does not appear to be active.\n", | |
150 | devname); | |
151 | return 1; | |
152 | } | |
153 | */ | |
154 | if (runstop>0) { | |
155 | if (ioctl(fd, RUN_ARRAY, ¶m)) { | |
156 | fprintf(stderr, Name ": failed to run array %s: %s\n", | |
157 | devname, strerror(errno)); | |
158 | return 1; | |
159 | } | |
160 | if (quiet <= 0) | |
161 | fprintf(stderr, Name ": started %s\n", devname); | |
162 | } else if (runstop < 0){ | |
163 | struct map_ent *map = NULL; | |
164 | struct stat stb; | |
165 | struct mdinfo *mdi; | |
166 | /* If this is an mdmon managed array, just write 'inactive' | |
167 | * to the array state and let mdmon clear up. | |
168 | */ | |
169 | mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION); | |
170 | if (mdi && | |
171 | mdi->array.level > 0 && | |
172 | is_subarray(mdi->text_version)) { | |
173 | /* This is mdmon managed. */ | |
174 | close(fd); | |
175 | if (sysfs_set_str(mdi, NULL, | |
176 | "array_state", "inactive") < 0) { | |
177 | if (quiet == 0) | |
178 | fprintf(stderr, Name | |
179 | ": failed to stop array %s: %s\n", | |
180 | devname, strerror(errno)); | |
181 | return 1; | |
182 | } | |
183 | ||
184 | /* Give monitor a chance to act */ | |
185 | ping_monitor(mdi->text_version); | |
186 | ||
187 | fd = open(devname, O_RDONLY); | |
188 | } else if (mdi && | |
189 | mdi->array.major_version == -1 && | |
190 | mdi->array.minor_version == -2 && | |
191 | !is_subarray(mdi->text_version)) { | |
192 | /* container, possibly mdmon-managed. | |
193 | * Make sure mdmon isn't opening it, which | |
194 | * would interfere with the 'stop' | |
195 | */ | |
196 | ping_monitor(mdi->sys_name); | |
197 | } | |
198 | if (mdi) | |
199 | sysfs_free(mdi); | |
200 | ||
201 | if (fd >= 0 && ioctl(fd, STOP_ARRAY, NULL)) { | |
202 | if (quiet == 0) { | |
203 | fprintf(stderr, Name | |
204 | ": failed to stop array %s: %s\n", | |
205 | devname, strerror(errno)); | |
206 | if (errno == EBUSY) | |
207 | fprintf(stderr, "Perhaps a running " | |
208 | "process, mounted filesystem " | |
209 | "or active volume group?\n"); | |
210 | } | |
211 | return 1; | |
212 | } | |
213 | ||
214 | if (quiet <= 0) | |
215 | fprintf(stderr, Name ": stopped %s\n", devname); | |
216 | if (fd >= 0 && fstat(fd, &stb) == 0) { | |
217 | int devnum; | |
218 | if (major(stb.st_rdev) == MD_MAJOR) | |
219 | devnum = minor(stb.st_rdev); | |
220 | else | |
221 | devnum = -1-(minor(stb.st_rdev)>>6); | |
222 | map_delete(&map, devnum); | |
223 | map_write(map); | |
224 | map_free(map); | |
225 | } | |
226 | } | |
227 | return 0; | |
228 | } | |
229 | ||
230 | int Manage_resize(char *devname, int fd, long long size, int raid_disks) | |
231 | { | |
232 | mdu_array_info_t info; | |
233 | if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { | |
234 | fprintf(stderr, Name ": Cannot get array information for %s: %s\n", | |
235 | devname, strerror(errno)); | |
236 | return 1; | |
237 | } | |
238 | if (size >= 0) | |
239 | info.size = size; | |
240 | if (raid_disks > 0) | |
241 | info.raid_disks = raid_disks; | |
242 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
243 | fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n", | |
244 | devname, strerror(errno)); | |
245 | return 1; | |
246 | } | |
247 | return 0; | |
248 | } | |
249 | ||
250 | int Manage_reconfig(char *devname, int fd, int layout) | |
251 | { | |
252 | mdu_array_info_t info; | |
253 | if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { | |
254 | fprintf(stderr, Name ": Cannot get array information for %s: %s\n", | |
255 | devname, strerror(errno)); | |
256 | return 1; | |
257 | } | |
258 | info.layout = layout; | |
259 | printf("layout set to %d\n", info.layout); | |
260 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
261 | fprintf(stderr, Name ": Cannot set layout for %s: %s\n", | |
262 | devname, strerror(errno)); | |
263 | return 1; | |
264 | } | |
265 | return 0; | |
266 | } | |
267 | ||
268 | int Manage_subdevs(char *devname, int fd, | |
269 | mddev_dev_t devlist, int verbose) | |
270 | { | |
271 | /* do something to each dev. | |
272 | * devmode can be | |
273 | * 'a' - add the device | |
274 | * try HOT_ADD_DISK | |
275 | * If that fails EINVAL, try ADD_NEW_DISK | |
276 | * 'r' - remove the device HOT_REMOVE_DISK | |
277 | * device can be 'faulty' or 'detached' in which case all | |
278 | * matching devices are removed. | |
279 | * 'f' - set the device faulty SET_DISK_FAULTY | |
280 | * device can be 'detached' in which case any device that | |
281 | * is inaccessible will be marked faulty. | |
282 | */ | |
283 | mdu_array_info_t array; | |
284 | mdu_disk_info_t disc; | |
285 | unsigned long long array_size; | |
286 | mddev_dev_t dv, next = NULL; | |
287 | struct stat stb; | |
288 | int j, jnext = 0; | |
289 | int tfd; | |
290 | struct supertype *st, *tst; | |
291 | int duuid[4]; | |
292 | int ouuid[4]; | |
293 | int lfd = -1; | |
294 | ||
295 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
296 | fprintf(stderr, Name ": cannot get array info for %s\n", | |
297 | devname); | |
298 | return 1; | |
299 | } | |
300 | ||
301 | /* array.size is only 32 bit and may be truncated. | |
302 | * So read from sysfs if possible, and record number of sectors | |
303 | */ | |
304 | ||
305 | array_size = get_component_size(fd); | |
306 | if (array_size <= 0) | |
307 | array_size = array.size * 2; | |
308 | ||
309 | tst = super_by_fd(fd); | |
310 | if (!tst) { | |
311 | fprintf(stderr, Name ": unsupport array - version %d.%d\n", | |
312 | array.major_version, array.minor_version); | |
313 | return 1; | |
314 | } | |
315 | ||
316 | for (dv = devlist, j=0 ; dv; dv = next, j = jnext) { | |
317 | unsigned long long ldsize; | |
318 | char dvname[20]; | |
319 | char *dnprintable = dv->devname; | |
320 | int err; | |
321 | ||
322 | next = dv->next; | |
323 | jnext = 0; | |
324 | ||
325 | if (strcmp(dv->devname, "failed")==0 || | |
326 | strcmp(dv->devname, "faulty")==0) { | |
327 | if (dv->disposition != 'r') { | |
328 | fprintf(stderr, Name ": %s only meaningful " | |
329 | "with -r, not -%c\n", | |
330 | dv->devname, dv->disposition); | |
331 | return 1; | |
332 | } | |
333 | for (; j < array.raid_disks + array.nr_disks ; j++) { | |
334 | disc.number = j; | |
335 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
336 | continue; | |
337 | if (disc.major == 0 && disc.minor == 0) | |
338 | continue; | |
339 | if ((disc.state & 1) == 0) /* faulty */ | |
340 | continue; | |
341 | stb.st_rdev = makedev(disc.major, disc.minor); | |
342 | next = dv; | |
343 | jnext = j+1; | |
344 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
345 | dnprintable = dvname; | |
346 | break; | |
347 | } | |
348 | if (jnext == 0) | |
349 | continue; | |
350 | } else if (strcmp(dv->devname, "detached") == 0) { | |
351 | if (dv->disposition != 'r' && dv->disposition != 'f') { | |
352 | fprintf(stderr, Name ": %s only meaningful " | |
353 | "with -r of -f, not -%c\n", | |
354 | dv->devname, dv->disposition); | |
355 | return 1; | |
356 | } | |
357 | for (; j < array.raid_disks + array.nr_disks; j++) { | |
358 | int sfd; | |
359 | disc.number = j; | |
360 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
361 | continue; | |
362 | if (disc.major == 0 && disc.minor == 0) | |
363 | continue; | |
364 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
365 | sfd = dev_open(dvname, O_RDONLY); | |
366 | if (sfd >= 0) { | |
367 | close(sfd); | |
368 | continue; | |
369 | } | |
370 | if (dv->disposition == 'f' && | |
371 | (disc.state & 1) == 1) /* already faulty */ | |
372 | continue; | |
373 | if (errno != ENXIO) | |
374 | continue; | |
375 | stb.st_rdev = makedev(disc.major, disc.minor); | |
376 | next = dv; | |
377 | jnext = j+1; | |
378 | dnprintable = dvname; | |
379 | break; | |
380 | } | |
381 | if (jnext == 0) | |
382 | continue; | |
383 | } else { | |
384 | j = 0; | |
385 | ||
386 | if (stat(dv->devname, &stb)) { | |
387 | fprintf(stderr, Name ": cannot find %s: %s\n", | |
388 | dv->devname, strerror(errno)); | |
389 | return 1; | |
390 | } | |
391 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
392 | fprintf(stderr, Name ": %s is not a " | |
393 | "block device.\n", | |
394 | dv->devname); | |
395 | return 1; | |
396 | } | |
397 | } | |
398 | switch(dv->disposition){ | |
399 | default: | |
400 | fprintf(stderr, Name ": internal error - devmode[%s]=%d\n", | |
401 | dv->devname, dv->disposition); | |
402 | return 1; | |
403 | case 'a': | |
404 | /* add the device */ | |
405 | if (tst->subarray[0]) { | |
406 | fprintf(stderr, Name ": Cannot add disks to a" | |
407 | " \'member\' array, perform this" | |
408 | " operation on the parent container\n"); | |
409 | return 1; | |
410 | } | |
411 | /* Make sure it isn't in use (in 2.6 or later) */ | |
412 | tfd = open(dv->devname, O_RDONLY|O_EXCL|O_DIRECT); | |
413 | if (tfd < 0) { | |
414 | fprintf(stderr, Name ": Cannot open %s: %s\n", | |
415 | dv->devname, strerror(errno)); | |
416 | return 1; | |
417 | } | |
418 | remove_partitions(tfd); | |
419 | ||
420 | st = dup_super(tst); | |
421 | ||
422 | if (array.not_persistent==0) | |
423 | st->ss->load_super(st, tfd, NULL); | |
424 | ||
425 | if (!get_dev_size(tfd, dv->devname, &ldsize)) { | |
426 | close(tfd); | |
427 | return 1; | |
428 | } | |
429 | close(tfd); | |
430 | ||
431 | ||
432 | if (!tst->ss->external && | |
433 | array.major_version == 0 && | |
434 | md_get_version(fd)%100 < 2) { | |
435 | if (ioctl(fd, HOT_ADD_DISK, | |
436 | (unsigned long)stb.st_rdev)==0) { | |
437 | if (verbose >= 0) | |
438 | fprintf(stderr, Name ": hot added %s\n", | |
439 | dv->devname); | |
440 | continue; | |
441 | } | |
442 | ||
443 | fprintf(stderr, Name ": hot add failed for %s: %s\n", | |
444 | dv->devname, strerror(errno)); | |
445 | return 1; | |
446 | } | |
447 | ||
448 | if (array.not_persistent == 0 || tst->ss->external) { | |
449 | ||
450 | /* need to find a sample superblock to copy, and | |
451 | * a spare slot to use. | |
452 | * For 'external' array (well, container based), | |
453 | * We can just load the metadata for the array. | |
454 | */ | |
455 | if (tst->ss->external) { | |
456 | tst->ss->load_super(tst, fd, NULL); | |
457 | } else for (j = 0; j < tst->max_devs; j++) { | |
458 | char *dev; | |
459 | int dfd; | |
460 | disc.number = j; | |
461 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
462 | continue; | |
463 | if (disc.major==0 && disc.minor==0) | |
464 | continue; | |
465 | if ((disc.state & 4)==0) continue; /* sync */ | |
466 | /* Looks like a good device to try */ | |
467 | dev = map_dev(disc.major, disc.minor, 1); | |
468 | if (!dev) continue; | |
469 | dfd = dev_open(dev, O_RDONLY); | |
470 | if (dfd < 0) continue; | |
471 | if (tst->ss->load_super(tst, dfd, | |
472 | NULL)) { | |
473 | close(dfd); | |
474 | continue; | |
475 | } | |
476 | close(dfd); | |
477 | break; | |
478 | } | |
479 | /* FIXME this is a bad test to be using */ | |
480 | if (!tst->sb) { | |
481 | fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n"); | |
482 | return 1; | |
483 | } | |
484 | ||
485 | /* Make sure device is large enough */ | |
486 | if (tst->ss->avail_size(tst, ldsize/512) < | |
487 | array_size) { | |
488 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
489 | dv->devname); | |
490 | return 1; | |
491 | } | |
492 | ||
493 | /* Possibly this device was recently part of the array | |
494 | * and was temporarily removed, and is now being re-added. | |
495 | * If so, we can simply re-add it. | |
496 | */ | |
497 | tst->ss->uuid_from_super(tst, duuid); | |
498 | ||
499 | /* re-add doesn't work for version-1 superblocks | |
500 | * before 2.6.18 :-( | |
501 | */ | |
502 | if (array.major_version == 1 && | |
503 | get_linux_version() <= 2006018) | |
504 | ; | |
505 | else if (st->sb) { | |
506 | st->ss->uuid_from_super(st, ouuid); | |
507 | if (memcmp(duuid, ouuid, sizeof(ouuid))==0) { | |
508 | /* looks close enough for now. Kernel | |
509 | * will worry about whether a bitmap | |
510 | * based reconstruction is possible. | |
511 | */ | |
512 | struct mdinfo mdi; | |
513 | st->ss->getinfo_super(st, &mdi); | |
514 | disc.major = major(stb.st_rdev); | |
515 | disc.minor = minor(stb.st_rdev); | |
516 | disc.number = mdi.disk.number; | |
517 | disc.raid_disk = mdi.disk.raid_disk; | |
518 | disc.state = mdi.disk.state; | |
519 | if (dv->writemostly == 1) | |
520 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
521 | if (dv->writemostly == 2) | |
522 | disc.state &= ~(1 << MD_DISK_WRITEMOSTLY); | |
523 | if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) { | |
524 | if (verbose >= 0) | |
525 | fprintf(stderr, Name ": re-added %s\n", dv->devname); | |
526 | continue; | |
527 | } | |
528 | /* fall back on normal-add */ | |
529 | } | |
530 | } | |
531 | } else { | |
532 | /* non-persistent. Must ensure that new drive | |
533 | * is at least array.size big. | |
534 | */ | |
535 | if (ldsize/512 < array_size) { | |
536 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
537 | dv->devname); | |
538 | return 1; | |
539 | } | |
540 | } | |
541 | /* in 2.6.17 and earlier, version-1 superblocks won't | |
542 | * use the number we write, but will choose a free number. | |
543 | * we must choose the same free number, which requires | |
544 | * starting at 'raid_disks' and counting up | |
545 | */ | |
546 | for (j = array.raid_disks; j< tst->max_devs; j++) { | |
547 | disc.number = j; | |
548 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
549 | break; | |
550 | if (disc.major==0 && disc.minor==0) | |
551 | break; | |
552 | if (disc.state & 8) /* removed */ | |
553 | break; | |
554 | } | |
555 | disc.major = major(stb.st_rdev); | |
556 | disc.minor = minor(stb.st_rdev); | |
557 | disc.number =j; | |
558 | disc.state = 0; | |
559 | if (array.not_persistent==0 || tst->ss->external) { | |
560 | int dfd; | |
561 | if (dv->writemostly == 1) | |
562 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
563 | dfd = open(dv->devname, O_RDWR | O_EXCL|O_DIRECT); | |
564 | tst->ss->add_to_super(tst, &disc, dfd, | |
565 | dv->devname); | |
566 | /* write_init_super will close 'dfd' */ | |
567 | if (tst->ss->external) | |
568 | /* mdmon will write the metadata */ | |
569 | close(dfd); | |
570 | else if (tst->ss->write_init_super(tst)) | |
571 | return 1; | |
572 | } else if (dv->re_add) { | |
573 | /* this had better be raid1. | |
574 | * As we are "--re-add"ing we must find a spare slot | |
575 | * to fill. | |
576 | */ | |
577 | char *used = malloc(array.raid_disks); | |
578 | memset(used, 0, array.raid_disks); | |
579 | for (j=0; j< tst->max_devs; j++) { | |
580 | mdu_disk_info_t disc2; | |
581 | disc2.number = j; | |
582 | if (ioctl(fd, GET_DISK_INFO, &disc2)) | |
583 | continue; | |
584 | if (disc2.major==0 && disc2.minor==0) | |
585 | continue; | |
586 | if (disc2.state & 8) /* removed */ | |
587 | continue; | |
588 | if (disc2.raid_disk < 0) | |
589 | continue; | |
590 | if (disc2.raid_disk > array.raid_disks) | |
591 | continue; | |
592 | used[disc2.raid_disk] = 1; | |
593 | } | |
594 | for (j=0 ; j<array.raid_disks; j++) | |
595 | if (!used[j]) { | |
596 | disc.raid_disk = j; | |
597 | disc.state |= (1<<MD_DISK_SYNC); | |
598 | break; | |
599 | } | |
600 | } | |
601 | if (dv->writemostly == 1) | |
602 | disc.state |= (1 << MD_DISK_WRITEMOSTLY); | |
603 | if (tst->ss->external) { | |
604 | /* add a disk to an external metadata container | |
605 | * only if mdmon is around to see it | |
606 | */ | |
607 | struct mdinfo new_mdi; | |
608 | struct mdinfo *sra; | |
609 | int container_fd; | |
610 | int devnum = fd2devnum(fd); | |
611 | ||
612 | container_fd = open_dev_excl(devnum); | |
613 | if (container_fd < 0) { | |
614 | fprintf(stderr, Name ": add failed for %s:" | |
615 | " could not get exclusive access to container\n", | |
616 | dv->devname); | |
617 | return 1; | |
618 | } | |
619 | ||
620 | if (!mdmon_running(devnum)) { | |
621 | fprintf(stderr, Name ": add failed for %s: mdmon not running\n", | |
622 | dv->devname); | |
623 | close(container_fd); | |
624 | return 1; | |
625 | } | |
626 | ||
627 | sra = sysfs_read(container_fd, -1, 0); | |
628 | if (!sra) { | |
629 | fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n", | |
630 | dv->devname); | |
631 | close(container_fd); | |
632 | return 1; | |
633 | } | |
634 | sra->array.level = LEVEL_CONTAINER; | |
635 | /* Need to set data_offset and component_size */ | |
636 | tst->ss->getinfo_super(tst, &new_mdi); | |
637 | new_mdi.disk.major = disc.major; | |
638 | new_mdi.disk.minor = disc.minor; | |
639 | if (sysfs_add_disk(sra, &new_mdi) != 0) { | |
640 | fprintf(stderr, Name ": add new device to external metadata" | |
641 | " failed for %s\n", dv->devname); | |
642 | close(container_fd); | |
643 | return 1; | |
644 | } | |
645 | ping_monitor(devnum2devname(devnum)); | |
646 | sysfs_free(sra); | |
647 | close(container_fd); | |
648 | } else if (ioctl(fd, ADD_NEW_DISK, &disc)) { | |
649 | fprintf(stderr, Name ": add new device failed for %s as %d: %s\n", | |
650 | dv->devname, j, strerror(errno)); | |
651 | return 1; | |
652 | } | |
653 | if (verbose >= 0) | |
654 | fprintf(stderr, Name ": added %s\n", dv->devname); | |
655 | break; | |
656 | ||
657 | case 'r': | |
658 | /* hot remove */ | |
659 | if (tst->subarray[0]) { | |
660 | fprintf(stderr, Name ": Cannot remove disks from a" | |
661 | " \'member\' array, perform this" | |
662 | " operation on the parent container\n"); | |
663 | return 1; | |
664 | } | |
665 | if (tst->ss->external) { | |
666 | /* To remove a device from a container, we must | |
667 | * check that it isn't in use in an array. | |
668 | * This involves looking in the 'holders' | |
669 | * directory - there must be just one entry, | |
670 | * the container. | |
671 | * To ensure that it doesn't get used as a | |
672 | * hold spare while we are checking, we | |
673 | * get an O_EXCL open on the container | |
674 | */ | |
675 | int dnum = fd2devnum(fd); | |
676 | lfd = open_dev_excl(dnum); | |
677 | if (lfd < 0) { | |
678 | fprintf(stderr, Name | |
679 | ": Cannot get exclusive access " | |
680 | " to container - odd\n"); | |
681 | return 1; | |
682 | } | |
683 | if (!sysfs_unique_holder(dnum, stb.st_rdev)) { | |
684 | fprintf(stderr, Name | |
685 | ": %s is %s, cannot remove.\n", | |
686 | dnprintable, | |
687 | errno == EEXIST ? "still in use": | |
688 | "not a member"); | |
689 | close(lfd); | |
690 | return 1; | |
691 | } | |
692 | } | |
693 | /* FIXME check that it is a current member */ | |
694 | err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev); | |
695 | if (err && errno == ENODEV) { | |
696 | /* Old kernels rejected this if no personality | |
697 | * registered */ | |
698 | struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS); | |
699 | struct mdinfo *dv = NULL; | |
700 | if (sra) | |
701 | dv = sra->devs; | |
702 | for ( ; dv ; dv=dv->next) | |
703 | if (dv->disk.major == major(stb.st_rdev) && | |
704 | dv->disk.minor == minor(stb.st_rdev)) | |
705 | break; | |
706 | if (dv) | |
707 | err = sysfs_set_str(sra, dv, | |
708 | "state", "remove"); | |
709 | else | |
710 | err = -1; | |
711 | if (sra) | |
712 | sysfs_free(sra); | |
713 | } | |
714 | if (err) { | |
715 | fprintf(stderr, Name ": hot remove failed " | |
716 | "for %s: %s\n", dnprintable, | |
717 | strerror(errno)); | |
718 | if (lfd >= 0) | |
719 | close(lfd); | |
720 | return 1; | |
721 | } | |
722 | if (tst->ss->external) { | |
723 | /* | |
724 | * Before dropping our exclusive open we make an | |
725 | * attempt at preventing mdmon from seeing an | |
726 | * 'add' event before reconciling this 'remove' | |
727 | * event. | |
728 | */ | |
729 | char *name = devnum2devname(fd2devnum(fd)); | |
730 | ||
731 | if (!name) { | |
732 | fprintf(stderr, Name ": unable to get container name\n"); | |
733 | return 1; | |
734 | } | |
735 | ||
736 | ping_manager(name); | |
737 | free(name); | |
738 | } | |
739 | close(lfd); | |
740 | if (verbose >= 0) | |
741 | fprintf(stderr, Name ": hot removed %s\n", | |
742 | dnprintable); | |
743 | break; | |
744 | ||
745 | case 'f': /* set faulty */ | |
746 | /* FIXME check current member */ | |
747 | if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) { | |
748 | fprintf(stderr, Name ": set device faulty failed for %s: %s\n", | |
749 | dnprintable, strerror(errno)); | |
750 | return 1; | |
751 | } | |
752 | if (verbose >= 0) | |
753 | fprintf(stderr, Name ": set %s faulty in %s\n", | |
754 | dnprintable, devname); | |
755 | break; | |
756 | } | |
757 | } | |
758 | return 0; | |
759 | ||
760 | } | |
761 | ||
762 | int autodetect(void) | |
763 | { | |
764 | /* Open any md device, and issue the RAID_AUTORUN ioctl */ | |
765 | int rv = 1; | |
766 | int fd = dev_open("9:0", O_RDONLY); | |
767 | if (fd >= 0) { | |
768 | if (ioctl(fd, RAID_AUTORUN, 0) == 0) | |
769 | rv = 0; | |
770 | close(fd); | |
771 | } | |
772 | return rv; | |
773 | } | |
774 | #endif |