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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 | /* container, possibly mdmon-managed. | |
240 | * Make sure mdmon isn't opening it, which | |
241 | * would interfere with the 'stop' | |
242 | */ | |
243 | ping_monitor(mdi->sys_name); | |
244 | } | |
245 | ||
246 | if (fd >= 0 && ioctl(fd, STOP_ARRAY, NULL)) { | |
247 | if (quiet == 0) { | |
248 | fprintf(stderr, Name | |
249 | ": failed to stop array %s: %s\n", | |
250 | devname, strerror(errno)); | |
251 | if (errno == EBUSY) | |
252 | fprintf(stderr, "Perhaps a running " | |
253 | "process, mounted filesystem " | |
254 | "or active volume group?\n"); | |
255 | } | |
256 | if (mdi) | |
257 | sysfs_free(mdi); | |
258 | return 1; | |
259 | } | |
260 | /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array | |
261 | * was stopped, so We'll do it here just to be sure. Drop any | |
262 | * partitions as well... | |
263 | */ | |
264 | if (fd >= 0) | |
265 | ioctl(fd, BLKRRPART, 0); | |
266 | if (mdi) | |
267 | sysfs_uevent(mdi, "change"); | |
268 | ||
269 | ||
270 | if (devnum != NoMdDev && | |
271 | (stat("/dev/.udev", &stb) != 0 || | |
272 | check_env("MDADM_NO_UDEV"))) { | |
273 | struct map_ent *mp = map_by_devnum(&map, devnum); | |
274 | remove_devices(devnum, mp ? mp->path : NULL); | |
275 | } | |
276 | ||
277 | ||
278 | if (quiet <= 0) | |
279 | fprintf(stderr, Name ": stopped %s\n", devname); | |
280 | if (devnum != NoMdDev) { | |
281 | map_delete(&map, devnum); | |
282 | map_write(map); | |
283 | map_free(map); | |
284 | } | |
285 | } | |
286 | return 0; | |
287 | } | |
288 | ||
289 | int Manage_resize(char *devname, int fd, long long size, int raid_disks) | |
290 | { | |
291 | mdu_array_info_t info; | |
292 | if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { | |
293 | fprintf(stderr, Name ": Cannot get array information for %s: %s\n", | |
294 | devname, strerror(errno)); | |
295 | return 1; | |
296 | } | |
297 | if (size >= 0) | |
298 | info.size = size; | |
299 | if (raid_disks > 0) | |
300 | info.raid_disks = raid_disks; | |
301 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
302 | fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n", | |
303 | devname, strerror(errno)); | |
304 | return 1; | |
305 | } | |
306 | return 0; | |
307 | } | |
308 | ||
309 | int Manage_subdevs(char *devname, int fd, | |
310 | mddev_dev_t devlist, int verbose) | |
311 | { | |
312 | /* do something to each dev. | |
313 | * devmode can be | |
314 | * 'a' - add the device | |
315 | * try HOT_ADD_DISK | |
316 | * If that fails EINVAL, try ADD_NEW_DISK | |
317 | * 'r' - remove the device HOT_REMOVE_DISK | |
318 | * device can be 'faulty' or 'detached' in which case all | |
319 | * matching devices are removed. | |
320 | * 'f' - set the device faulty SET_DISK_FAULTY | |
321 | * device can be 'detached' in which case any device that | |
322 | * is inaccessible will be marked faulty. | |
323 | */ | |
324 | mdu_array_info_t array; | |
325 | mdu_disk_info_t disc; | |
326 | unsigned long long array_size; | |
327 | mddev_dev_t dv, next = NULL; | |
328 | struct stat stb; | |
329 | int j, jnext = 0; | |
330 | int tfd; | |
331 | struct supertype *st, *tst; | |
332 | int duuid[4]; | |
333 | int ouuid[4]; | |
334 | int lfd = -1; | |
335 | ||
336 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
337 | fprintf(stderr, Name ": cannot get array info for %s\n", | |
338 | devname); | |
339 | return 1; | |
340 | } | |
341 | ||
342 | /* array.size is only 32 bit and may be truncated. | |
343 | * So read from sysfs if possible, and record number of sectors | |
344 | */ | |
345 | ||
346 | array_size = get_component_size(fd); | |
347 | if (array_size <= 0) | |
348 | array_size = array.size * 2; | |
349 | ||
350 | tst = super_by_fd(fd); | |
351 | if (!tst) { | |
352 | fprintf(stderr, Name ": unsupport array - version %d.%d\n", | |
353 | array.major_version, array.minor_version); | |
354 | return 1; | |
355 | } | |
356 | ||
357 | for (dv = devlist, j=0 ; dv; dv = next, j = jnext) { | |
358 | unsigned long long ldsize; | |
359 | char dvname[20]; | |
360 | char *dnprintable = dv->devname; | |
361 | int err; | |
362 | ||
363 | next = dv->next; | |
364 | jnext = 0; | |
365 | ||
366 | if (strcmp(dv->devname, "failed")==0 || | |
367 | strcmp(dv->devname, "faulty")==0) { | |
368 | if (dv->disposition != 'r') { | |
369 | fprintf(stderr, Name ": %s only meaningful " | |
370 | "with -r, not -%c\n", | |
371 | dv->devname, dv->disposition); | |
372 | return 1; | |
373 | } | |
374 | for (; j < array.raid_disks + array.nr_disks ; j++) { | |
375 | disc.number = j; | |
376 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
377 | continue; | |
378 | if (disc.major == 0 && disc.minor == 0) | |
379 | continue; | |
380 | if ((disc.state & 1) == 0) /* faulty */ | |
381 | continue; | |
382 | stb.st_rdev = makedev(disc.major, disc.minor); | |
383 | next = dv; | |
384 | jnext = j+1; | |
385 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
386 | dnprintable = dvname; | |
387 | break; | |
388 | } | |
389 | if (jnext == 0) | |
390 | continue; | |
391 | } else if (strcmp(dv->devname, "detached") == 0) { | |
392 | if (dv->disposition != 'r' && dv->disposition != 'f') { | |
393 | fprintf(stderr, Name ": %s only meaningful " | |
394 | "with -r of -f, not -%c\n", | |
395 | dv->devname, dv->disposition); | |
396 | return 1; | |
397 | } | |
398 | for (; j < array.raid_disks + array.nr_disks; j++) { | |
399 | int sfd; | |
400 | disc.number = j; | |
401 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
402 | continue; | |
403 | if (disc.major == 0 && disc.minor == 0) | |
404 | continue; | |
405 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
406 | sfd = dev_open(dvname, O_RDONLY); | |
407 | if (sfd >= 0) { | |
408 | close(sfd); | |
409 | continue; | |
410 | } | |
411 | if (dv->disposition == 'f' && | |
412 | (disc.state & 1) == 1) /* already faulty */ | |
413 | continue; | |
414 | if (errno != ENXIO) | |
415 | continue; | |
416 | stb.st_rdev = makedev(disc.major, disc.minor); | |
417 | next = dv; | |
418 | jnext = j+1; | |
419 | dnprintable = dvname; | |
420 | break; | |
421 | } | |
422 | if (jnext == 0) | |
423 | continue; | |
424 | } else { | |
425 | j = 0; | |
426 | ||
427 | tfd = dev_open(dv->devname, O_RDONLY); | |
428 | if (tfd < 0 || fstat(tfd, &stb) != 0) { | |
429 | fprintf(stderr, Name ": cannot find %s: %s\n", | |
430 | dv->devname, strerror(errno)); | |
431 | if (tfd >= 0) | |
432 | close(tfd); | |
433 | return 1; | |
434 | } | |
435 | close(tfd); | |
436 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
437 | fprintf(stderr, Name ": %s is not a " | |
438 | "block device.\n", | |
439 | dv->devname); | |
440 | return 1; | |
441 | } | |
442 | } | |
443 | switch(dv->disposition){ | |
444 | default: | |
445 | fprintf(stderr, Name ": internal error - devmode[%s]=%d\n", | |
446 | dv->devname, dv->disposition); | |
447 | return 1; | |
448 | case 'a': | |
449 | /* add the device */ | |
450 | if (tst->subarray[0]) { | |
451 | fprintf(stderr, Name ": Cannot add disks to a" | |
452 | " \'member\' array, perform this" | |
453 | " operation on the parent container\n"); | |
454 | return 1; | |
455 | } | |
456 | /* Make sure it isn't in use (in 2.6 or later) */ | |
457 | tfd = dev_open(dv->devname, O_RDONLY|O_EXCL|O_DIRECT); | |
458 | if (tfd < 0) { | |
459 | fprintf(stderr, Name ": Cannot open %s: %s\n", | |
460 | dv->devname, strerror(errno)); | |
461 | return 1; | |
462 | } | |
463 | remove_partitions(tfd); | |
464 | ||
465 | st = dup_super(tst); | |
466 | ||
467 | if (array.not_persistent==0) | |
468 | st->ss->load_super(st, tfd, NULL); | |
469 | ||
470 | if (!get_dev_size(tfd, dv->devname, &ldsize)) { | |
471 | close(tfd); | |
472 | return 1; | |
473 | } | |
474 | close(tfd); | |
475 | ||
476 | ||
477 | if (!tst->ss->external && | |
478 | array.major_version == 0 && | |
479 | md_get_version(fd)%100 < 2) { | |
480 | if (ioctl(fd, HOT_ADD_DISK, | |
481 | (unsigned long)stb.st_rdev)==0) { | |
482 | if (verbose >= 0) | |
483 | fprintf(stderr, Name ": hot added %s\n", | |
484 | dv->devname); | |
485 | continue; | |
486 | } | |
487 | ||
488 | fprintf(stderr, Name ": hot add failed for %s: %s\n", | |
489 | dv->devname, strerror(errno)); | |
490 | return 1; | |
491 | } | |
492 | ||
493 | if (array.not_persistent == 0 || tst->ss->external) { | |
494 | ||
495 | /* need to find a sample superblock to copy, and | |
496 | * a spare slot to use. | |
497 | * For 'external' array (well, container based), | |
498 | * We can just load the metadata for the array. | |
499 | */ | |
500 | if (tst->ss->external) { | |
501 | tst->ss->load_super(tst, fd, NULL); | |
502 | } else for (j = 0; j < tst->max_devs; j++) { | |
503 | char *dev; | |
504 | int dfd; | |
505 | disc.number = j; | |
506 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
507 | continue; | |
508 | if (disc.major==0 && disc.minor==0) | |
509 | continue; | |
510 | if ((disc.state & 4)==0) continue; /* sync */ | |
511 | /* Looks like a good device to try */ | |
512 | dev = map_dev(disc.major, disc.minor, 1); | |
513 | if (!dev) continue; | |
514 | dfd = dev_open(dev, O_RDONLY); | |
515 | if (dfd < 0) continue; | |
516 | if (tst->ss->load_super(tst, dfd, | |
517 | NULL)) { | |
518 | close(dfd); | |
519 | continue; | |
520 | } | |
521 | close(dfd); | |
522 | break; | |
523 | } | |
524 | /* FIXME this is a bad test to be using */ | |
525 | if (!tst->sb) { | |
526 | fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n"); | |
527 | return 1; | |
528 | } | |
529 | ||
530 | /* Make sure device is large enough */ | |
531 | if (tst->ss->avail_size(tst, ldsize/512) < | |
532 | array_size) { | |
533 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
534 | dv->devname); | |
535 | return 1; | |
536 | } | |
537 | ||
538 | /* Possibly this device was recently part of the array | |
539 | * and was temporarily removed, and is now being re-added. | |
540 | * If so, we can simply re-add it. | |
541 | */ | |
542 | tst->ss->uuid_from_super(tst, duuid); | |
543 | ||
544 | /* re-add doesn't work for version-1 superblocks | |
545 | * before 2.6.18 :-( | |
546 | */ | |
547 | if (array.major_version == 1 && | |
548 | get_linux_version() <= 2006018) | |
549 | ; | |
550 | else if (st->sb) { | |
551 | st->ss->uuid_from_super(st, ouuid); | |
552 | if (memcmp(duuid, ouuid, sizeof(ouuid))==0) { | |
553 | /* looks close enough for now. Kernel | |
554 | * will worry about whether a bitmap | |
555 | * based reconstruction is possible. | |
556 | */ | |
557 | struct mdinfo mdi; | |
558 | st->ss->getinfo_super(st, &mdi); | |
559 | disc.major = major(stb.st_rdev); | |
560 | disc.minor = minor(stb.st_rdev); | |
561 | disc.number = mdi.disk.number; | |
562 | disc.raid_disk = mdi.disk.raid_disk; | |
563 | disc.state = mdi.disk.state; | |
564 | if (dv->writemostly == 1) | |
565 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
566 | if (dv->writemostly == 2) | |
567 | disc.state &= ~(1 << MD_DISK_WRITEMOSTLY); | |
568 | if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) { | |
569 | if (verbose >= 0) | |
570 | fprintf(stderr, Name ": re-added %s\n", dv->devname); | |
571 | continue; | |
572 | } | |
573 | if (errno == ENOMEM || errno == EROFS) { | |
574 | fprintf(stderr, Name ": add new device failed for %s: %s\n", | |
575 | dv->devname, strerror(errno)); | |
576 | return 1; | |
577 | } | |
578 | /* fall back on normal-add */ | |
579 | } | |
580 | } | |
581 | if (dv->re_add) { | |
582 | fprintf(stderr, Name | |
583 | ": --re-add for %s to %s is not possible\n", | |
584 | dv->devname, devname); | |
585 | return 1; | |
586 | } | |
587 | } else { | |
588 | /* non-persistent. Must ensure that new drive | |
589 | * is at least array.size big. | |
590 | */ | |
591 | if (ldsize/512 < array_size) { | |
592 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
593 | dv->devname); | |
594 | return 1; | |
595 | } | |
596 | } | |
597 | /* in 2.6.17 and earlier, version-1 superblocks won't | |
598 | * use the number we write, but will choose a free number. | |
599 | * we must choose the same free number, which requires | |
600 | * starting at 'raid_disks' and counting up | |
601 | */ | |
602 | for (j = array.raid_disks; j< tst->max_devs; j++) { | |
603 | disc.number = j; | |
604 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
605 | break; | |
606 | if (disc.major==0 && disc.minor==0) | |
607 | break; | |
608 | if (disc.state & 8) /* removed */ | |
609 | break; | |
610 | } | |
611 | disc.major = major(stb.st_rdev); | |
612 | disc.minor = minor(stb.st_rdev); | |
613 | disc.number =j; | |
614 | disc.state = 0; | |
615 | if (array.not_persistent==0 || tst->ss->external) { | |
616 | int dfd; | |
617 | if (dv->writemostly == 1) | |
618 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
619 | dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT); | |
620 | if (tst->ss->add_to_super(tst, &disc, dfd, | |
621 | dv->devname)) { | |
622 | close(dfd); | |
623 | return 1; | |
624 | } | |
625 | /* write_init_super will close 'dfd' */ | |
626 | if (tst->ss->external) | |
627 | /* mdmon will write the metadata */ | |
628 | close(dfd); | |
629 | else if (tst->ss->write_init_super(tst)) | |
630 | return 1; | |
631 | } else if (dv->re_add) { | |
632 | /* this had better be raid1. | |
633 | * As we are "--re-add"ing we must find a spare slot | |
634 | * to fill. | |
635 | */ | |
636 | char *used = malloc(array.raid_disks); | |
637 | memset(used, 0, array.raid_disks); | |
638 | for (j=0; j< tst->max_devs; j++) { | |
639 | mdu_disk_info_t disc2; | |
640 | disc2.number = j; | |
641 | if (ioctl(fd, GET_DISK_INFO, &disc2)) | |
642 | continue; | |
643 | if (disc2.major==0 && disc2.minor==0) | |
644 | continue; | |
645 | if (disc2.state & 8) /* removed */ | |
646 | continue; | |
647 | if (disc2.raid_disk < 0) | |
648 | continue; | |
649 | if (disc2.raid_disk > array.raid_disks) | |
650 | continue; | |
651 | used[disc2.raid_disk] = 1; | |
652 | } | |
653 | for (j=0 ; j<array.raid_disks; j++) | |
654 | if (!used[j]) { | |
655 | disc.raid_disk = j; | |
656 | disc.state |= (1<<MD_DISK_SYNC); | |
657 | break; | |
658 | } | |
659 | free(used); | |
660 | } | |
661 | if (dv->writemostly == 1) | |
662 | disc.state |= (1 << MD_DISK_WRITEMOSTLY); | |
663 | if (tst->ss->external) { | |
664 | /* add a disk to an external metadata container | |
665 | * only if mdmon is around to see it | |
666 | */ | |
667 | struct mdinfo new_mdi; | |
668 | struct mdinfo *sra; | |
669 | int container_fd; | |
670 | int devnum = fd2devnum(fd); | |
671 | ||
672 | container_fd = open_dev_excl(devnum); | |
673 | if (container_fd < 0) { | |
674 | fprintf(stderr, Name ": add failed for %s:" | |
675 | " could not get exclusive access to container\n", | |
676 | dv->devname); | |
677 | return 1; | |
678 | } | |
679 | ||
680 | if (!mdmon_running(devnum)) { | |
681 | fprintf(stderr, Name ": add failed for %s: mdmon not running\n", | |
682 | dv->devname); | |
683 | close(container_fd); | |
684 | return 1; | |
685 | } | |
686 | ||
687 | sra = sysfs_read(container_fd, -1, 0); | |
688 | if (!sra) { | |
689 | fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n", | |
690 | dv->devname); | |
691 | close(container_fd); | |
692 | return 1; | |
693 | } | |
694 | sra->array.level = LEVEL_CONTAINER; | |
695 | /* Need to set data_offset and component_size */ | |
696 | tst->ss->getinfo_super(tst, &new_mdi); | |
697 | new_mdi.disk.major = disc.major; | |
698 | new_mdi.disk.minor = disc.minor; | |
699 | if (sysfs_add_disk(sra, &new_mdi, 0) != 0) { | |
700 | fprintf(stderr, Name ": add new device to external metadata" | |
701 | " failed for %s\n", dv->devname); | |
702 | close(container_fd); | |
703 | return 1; | |
704 | } | |
705 | ping_monitor(devnum2devname(devnum)); | |
706 | sysfs_free(sra); | |
707 | close(container_fd); | |
708 | } else if (ioctl(fd, ADD_NEW_DISK, &disc)) { | |
709 | fprintf(stderr, Name ": add new device failed for %s as %d: %s\n", | |
710 | dv->devname, j, strerror(errno)); | |
711 | return 1; | |
712 | } | |
713 | if (verbose >= 0) | |
714 | fprintf(stderr, Name ": added %s\n", dv->devname); | |
715 | break; | |
716 | ||
717 | case 'r': | |
718 | /* hot remove */ | |
719 | if (tst->subarray[0]) { | |
720 | fprintf(stderr, Name ": Cannot remove disks from a" | |
721 | " \'member\' array, perform this" | |
722 | " operation on the parent container\n"); | |
723 | return 1; | |
724 | } | |
725 | if (tst->ss->external) { | |
726 | /* To remove a device from a container, we must | |
727 | * check that it isn't in use in an array. | |
728 | * This involves looking in the 'holders' | |
729 | * directory - there must be just one entry, | |
730 | * the container. | |
731 | * To ensure that it doesn't get used as a | |
732 | * hold spare while we are checking, we | |
733 | * get an O_EXCL open on the container | |
734 | */ | |
735 | int dnum = fd2devnum(fd); | |
736 | lfd = open_dev_excl(dnum); | |
737 | if (lfd < 0) { | |
738 | fprintf(stderr, Name | |
739 | ": Cannot get exclusive access " | |
740 | " to container - odd\n"); | |
741 | return 1; | |
742 | } | |
743 | /* in the detached case it is not possible to | |
744 | * check if we are the unique holder, so just | |
745 | * rely on the 'detached' checks | |
746 | */ | |
747 | if (strcmp(dv->devname, "detached") == 0 || | |
748 | sysfs_unique_holder(dnum, stb.st_rdev)) | |
749 | /* pass */; | |
750 | else { | |
751 | fprintf(stderr, Name | |
752 | ": %s is %s, cannot remove.\n", | |
753 | dnprintable, | |
754 | errno == EEXIST ? "still in use": | |
755 | "not a member"); | |
756 | close(lfd); | |
757 | return 1; | |
758 | } | |
759 | } | |
760 | /* FIXME check that it is a current member */ | |
761 | err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev); | |
762 | if (err && errno == ENODEV) { | |
763 | /* Old kernels rejected this if no personality | |
764 | * registered */ | |
765 | struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS); | |
766 | struct mdinfo *dv = NULL; | |
767 | if (sra) | |
768 | dv = sra->devs; | |
769 | for ( ; dv ; dv=dv->next) | |
770 | if (dv->disk.major == major(stb.st_rdev) && | |
771 | dv->disk.minor == minor(stb.st_rdev)) | |
772 | break; | |
773 | if (dv) | |
774 | err = sysfs_set_str(sra, dv, | |
775 | "state", "remove"); | |
776 | else | |
777 | err = -1; | |
778 | if (sra) | |
779 | sysfs_free(sra); | |
780 | } | |
781 | if (err) { | |
782 | fprintf(stderr, Name ": hot remove failed " | |
783 | "for %s: %s\n", dnprintable, | |
784 | strerror(errno)); | |
785 | if (lfd >= 0) | |
786 | close(lfd); | |
787 | return 1; | |
788 | } | |
789 | if (tst->ss->external) { | |
790 | /* | |
791 | * Before dropping our exclusive open we make an | |
792 | * attempt at preventing mdmon from seeing an | |
793 | * 'add' event before reconciling this 'remove' | |
794 | * event. | |
795 | */ | |
796 | char *name = devnum2devname(fd2devnum(fd)); | |
797 | ||
798 | if (!name) { | |
799 | fprintf(stderr, Name ": unable to get container name\n"); | |
800 | return 1; | |
801 | } | |
802 | ||
803 | ping_manager(name); | |
804 | free(name); | |
805 | } | |
806 | close(lfd); | |
807 | if (verbose >= 0) | |
808 | fprintf(stderr, Name ": hot removed %s\n", | |
809 | dnprintable); | |
810 | break; | |
811 | ||
812 | case 'f': /* set faulty */ | |
813 | /* FIXME check current member */ | |
814 | if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) { | |
815 | fprintf(stderr, Name ": set device faulty failed for %s: %s\n", | |
816 | dnprintable, strerror(errno)); | |
817 | return 1; | |
818 | } | |
819 | if (verbose >= 0) | |
820 | fprintf(stderr, Name ": set %s faulty in %s\n", | |
821 | dnprintable, devname); | |
822 | break; | |
823 | } | |
824 | } | |
825 | return 0; | |
826 | ||
827 | } | |
828 | ||
829 | int autodetect(void) | |
830 | { | |
831 | /* Open any md device, and issue the RAID_AUTORUN ioctl */ | |
832 | int rv = 1; | |
833 | int fd = dev_open("9:0", O_RDONLY); | |
834 | if (fd >= 0) { | |
835 | if (ioctl(fd, RAID_AUTORUN, 0) == 0) | |
836 | rv = 0; | |
837 | close(fd); | |
838 | } | |
839 | return rv; | |
840 | } | |
841 | #endif |