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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 | /* | |
122 | * Remove names at 'path' - possibly with | |
123 | * partition suffixes - which link to the 'standard' | |
124 | * name for devnum. These were probably created | |
125 | * by mdadm when the array was assembled. | |
126 | */ | |
127 | char base[40]; | |
128 | char *path2; | |
129 | char link[1024]; | |
130 | int n; | |
131 | int part; | |
132 | char *be; | |
133 | char *pe; | |
134 | ||
135 | if (!path) | |
136 | return; | |
137 | ||
138 | if (devnum >= 0) | |
139 | sprintf(base, "/dev/md%d", devnum); | |
140 | else | |
141 | sprintf(base, "/dev/md_d%d", -1-devnum); | |
142 | be = base + strlen(base); | |
143 | ||
144 | path2 = malloc(strlen(path)+20); | |
145 | strcpy(path2, path); | |
146 | pe = path2 + strlen(path2); | |
147 | ||
148 | for (part = 0; part < 16; part++) { | |
149 | if (part) { | |
150 | sprintf(be, "p%d", part); | |
151 | ||
152 | if (isdigit(pe[-1])) | |
153 | sprintf(pe, "p%d", part); | |
154 | else | |
155 | sprintf(pe, "%d", part); | |
156 | } | |
157 | n = readlink(path2, link, sizeof(link)); | |
158 | if (n && (int)strlen(base) == n && | |
159 | strncmp(link, base, n) == 0) | |
160 | unlink(path2); | |
161 | } | |
162 | free(path2); | |
163 | } | |
164 | ||
165 | ||
166 | int Manage_runstop(char *devname, int fd, int runstop, int quiet) | |
167 | { | |
168 | /* Run or stop the array. array must already be configured | |
169 | * required >= 0.90.0 | |
170 | * Only print failure messages if quiet == 0; | |
171 | * quiet > 0 means really be quiet | |
172 | * quiet < 0 means we will try again if it fails. | |
173 | */ | |
174 | mdu_param_t param; /* unused */ | |
175 | ||
176 | if (runstop == -1 && md_get_version(fd) < 9000) { | |
177 | if (ioctl(fd, STOP_MD, 0)) { | |
178 | if (quiet == 0) fprintf(stderr, | |
179 | Name ": stopping device %s " | |
180 | "failed: %s\n", | |
181 | devname, strerror(errno)); | |
182 | return 1; | |
183 | } | |
184 | } | |
185 | ||
186 | if (md_get_version(fd) < 9000) { | |
187 | fprintf(stderr, Name ": need md driver version 0.90.0 or later\n"); | |
188 | return 1; | |
189 | } | |
190 | /* | |
191 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
192 | fprintf(stderr, Name ": %s does not appear to be active.\n", | |
193 | devname); | |
194 | return 1; | |
195 | } | |
196 | */ | |
197 | if (runstop>0) { | |
198 | if (ioctl(fd, RUN_ARRAY, ¶m)) { | |
199 | fprintf(stderr, Name ": failed to run array %s: %s\n", | |
200 | devname, strerror(errno)); | |
201 | return 1; | |
202 | } | |
203 | if (quiet <= 0) | |
204 | fprintf(stderr, Name ": started %s\n", devname); | |
205 | } else if (runstop < 0){ | |
206 | struct map_ent *map = NULL; | |
207 | struct stat stb; | |
208 | struct mdinfo *mdi; | |
209 | int devnum; | |
210 | /* If this is an mdmon managed array, just write 'inactive' | |
211 | * to the array state and let mdmon clear up. | |
212 | */ | |
213 | devnum = fd2devnum(fd); | |
214 | mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION); | |
215 | if (mdi && | |
216 | mdi->array.level > 0 && | |
217 | is_subarray(mdi->text_version)) { | |
218 | /* This is mdmon managed. */ | |
219 | close(fd); | |
220 | if (sysfs_set_str(mdi, NULL, | |
221 | "array_state", "inactive") < 0) { | |
222 | if (quiet == 0) | |
223 | fprintf(stderr, Name | |
224 | ": failed to stop array %s: %s\n", | |
225 | devname, strerror(errno)); | |
226 | return 1; | |
227 | } | |
228 | ||
229 | /* Give monitor a chance to act */ | |
230 | ping_monitor(mdi->text_version); | |
231 | ||
232 | fd = open(devname, O_RDONLY); | |
233 | } else if (mdi && | |
234 | mdi->array.major_version == -1 && | |
235 | mdi->array.minor_version == -2 && | |
236 | !is_subarray(mdi->text_version)) { | |
237 | struct mdstat_ent *mds, *m; | |
238 | /* container, possibly mdmon-managed. | |
239 | * Make sure mdmon isn't opening it, which | |
240 | * would interfere with the 'stop' | |
241 | */ | |
242 | ping_monitor(mdi->sys_name); | |
243 | ||
244 | /* now check that there are no existing arrays | |
245 | * which are members of this array | |
246 | */ | |
247 | mds = mdstat_read(0, 0); | |
248 | for (m=mds; m; m=m->next) | |
249 | if (m->metadata_version && | |
250 | strncmp(m->metadata_version, "external:", 9)==0 && | |
251 | is_subarray(m->metadata_version+9) && | |
252 | devname2devnum(m->metadata_version+10) == devnum) { | |
253 | if (!quiet) | |
254 | fprintf(stderr, Name | |
255 | ": Cannot stop container %s: " | |
256 | "member %s still active\n", | |
257 | devname, m->dev); | |
258 | free_mdstat(mds); | |
259 | if (mdi) | |
260 | sysfs_free(mdi); | |
261 | return 1; | |
262 | } | |
263 | } | |
264 | ||
265 | if (fd >= 0 && ioctl(fd, STOP_ARRAY, NULL)) { | |
266 | if (quiet == 0) { | |
267 | fprintf(stderr, Name | |
268 | ": failed to stop array %s: %s\n", | |
269 | devname, strerror(errno)); | |
270 | if (errno == EBUSY) | |
271 | fprintf(stderr, "Perhaps a running " | |
272 | "process, mounted filesystem " | |
273 | "or active volume group?\n"); | |
274 | } | |
275 | if (mdi) | |
276 | sysfs_free(mdi); | |
277 | return 1; | |
278 | } | |
279 | /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array | |
280 | * was stopped, so We'll do it here just to be sure. Drop any | |
281 | * partitions as well... | |
282 | */ | |
283 | if (fd >= 0) | |
284 | ioctl(fd, BLKRRPART, 0); | |
285 | if (mdi) | |
286 | sysfs_uevent(mdi, "change"); | |
287 | ||
288 | ||
289 | if (devnum != NoMdDev && | |
290 | (stat("/dev/.udev", &stb) != 0 || | |
291 | check_env("MDADM_NO_UDEV"))) { | |
292 | struct map_ent *mp = map_by_devnum(&map, devnum); | |
293 | remove_devices(devnum, mp ? mp->path : NULL); | |
294 | } | |
295 | ||
296 | ||
297 | if (quiet <= 0) | |
298 | fprintf(stderr, Name ": stopped %s\n", devname); | |
299 | map_lock(&map); | |
300 | map_remove(&map, devnum); | |
301 | map_unlock(&map); | |
302 | } | |
303 | return 0; | |
304 | } | |
305 | ||
306 | int Manage_resize(char *devname, int fd, long long size, int raid_disks) | |
307 | { | |
308 | mdu_array_info_t info; | |
309 | if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { | |
310 | fprintf(stderr, Name ": Cannot get array information for %s: %s\n", | |
311 | devname, strerror(errno)); | |
312 | return 1; | |
313 | } | |
314 | if (size >= 0) | |
315 | info.size = size; | |
316 | if (raid_disks > 0) | |
317 | info.raid_disks = raid_disks; | |
318 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
319 | fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n", | |
320 | devname, strerror(errno)); | |
321 | return 1; | |
322 | } | |
323 | return 0; | |
324 | } | |
325 | ||
326 | int Manage_subdevs(char *devname, int fd, | |
327 | struct mddev_dev *devlist, int verbose, int test) | |
328 | { | |
329 | /* do something to each dev. | |
330 | * devmode can be | |
331 | * 'a' - add the device | |
332 | * try HOT_ADD_DISK | |
333 | * If that fails EINVAL, try ADD_NEW_DISK | |
334 | * 'r' - remove the device HOT_REMOVE_DISK | |
335 | * device can be 'faulty' or 'detached' in which case all | |
336 | * matching devices are removed. | |
337 | * 'f' - set the device faulty SET_DISK_FAULTY | |
338 | * device can be 'detached' in which case any device that | |
339 | * is inaccessible will be marked faulty. | |
340 | * For 'f' and 'r', the device can also be a kernel-internal | |
341 | * name such as 'sdb'. | |
342 | */ | |
343 | struct mddev_dev *add_devlist = NULL; | |
344 | mdu_array_info_t array; | |
345 | mdu_disk_info_t disc; | |
346 | unsigned long long array_size; | |
347 | struct mddev_dev *dv, *next = NULL; | |
348 | struct stat stb; | |
349 | int j, jnext = 0; | |
350 | int tfd = -1; | |
351 | struct supertype *st, *tst; | |
352 | char *subarray = NULL; | |
353 | int duuid[4]; | |
354 | int ouuid[4]; | |
355 | int lfd = -1; | |
356 | int sysfd = -1; | |
357 | int count = 0; /* number of actions taken */ | |
358 | ||
359 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
360 | fprintf(stderr, Name ": cannot get array info for %s\n", | |
361 | devname); | |
362 | return 1; | |
363 | } | |
364 | ||
365 | /* array.size is only 32 bit and may be truncated. | |
366 | * So read from sysfs if possible, and record number of sectors | |
367 | */ | |
368 | ||
369 | array_size = get_component_size(fd); | |
370 | if (array_size <= 0) | |
371 | array_size = array.size * 2; | |
372 | ||
373 | tst = super_by_fd(fd, &subarray); | |
374 | if (!tst) { | |
375 | fprintf(stderr, Name ": unsupport array - version %d.%d\n", | |
376 | array.major_version, array.minor_version); | |
377 | return 1; | |
378 | } | |
379 | ||
380 | stb.st_rdev = 0; | |
381 | for (dv = devlist, j=0 ; dv; dv = next, j = jnext) { | |
382 | unsigned long long ldsize; | |
383 | char dvname[20]; | |
384 | char *dnprintable = dv->devname; | |
385 | char *add_dev = dv->devname; | |
386 | int err; | |
387 | int re_add_failed = 0; | |
388 | ||
389 | next = dv->next; | |
390 | jnext = 0; | |
391 | ||
392 | if (strcmp(dv->devname, "failed")==0 || | |
393 | strcmp(dv->devname, "faulty")==0) { | |
394 | if (dv->disposition != 'r') { | |
395 | fprintf(stderr, Name ": %s only meaningful " | |
396 | "with -r, not -%c\n", | |
397 | dv->devname, dv->disposition); | |
398 | return 1; | |
399 | } | |
400 | for (; j < array.raid_disks + array.nr_disks ; j++) { | |
401 | unsigned dev; | |
402 | disc.number = j; | |
403 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
404 | continue; | |
405 | if (disc.major == 0 && disc.minor == 0) | |
406 | continue; | |
407 | if ((disc.state & 1) == 0) /* faulty */ | |
408 | continue; | |
409 | dev = makedev(disc.major, disc.minor); | |
410 | if (stb.st_rdev == dev) | |
411 | /* already did that one */ | |
412 | continue; | |
413 | stb.st_rdev = dev; | |
414 | next = dv; | |
415 | /* same slot again next time - things might | |
416 | * have reshuffled */ | |
417 | jnext = j; | |
418 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
419 | dnprintable = dvname; | |
420 | break; | |
421 | } | |
422 | if (jnext == 0) | |
423 | continue; | |
424 | } else if (strcmp(dv->devname, "detached") == 0) { | |
425 | if (dv->disposition != 'r' && dv->disposition != 'f') { | |
426 | fprintf(stderr, Name ": %s only meaningful " | |
427 | "with -r of -f, not -%c\n", | |
428 | dv->devname, dv->disposition); | |
429 | return 1; | |
430 | } | |
431 | for (; j < array.raid_disks + array.nr_disks; j++) { | |
432 | int sfd; | |
433 | unsigned dev; | |
434 | disc.number = j; | |
435 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
436 | continue; | |
437 | if (disc.major == 0 && disc.minor == 0) | |
438 | continue; | |
439 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
440 | sfd = dev_open(dvname, O_RDONLY); | |
441 | if (sfd >= 0) { | |
442 | close(sfd); | |
443 | continue; | |
444 | } | |
445 | if (dv->disposition == 'f' && | |
446 | (disc.state & 1) == 1) /* already faulty */ | |
447 | continue; | |
448 | if (errno != ENXIO) | |
449 | continue; | |
450 | dev = makedev(disc.major, disc.minor); | |
451 | if (stb.st_rdev == dev) | |
452 | /* already did that one */ | |
453 | continue; | |
454 | stb.st_rdev = dev; | |
455 | next = dv; | |
456 | /* same slot again next time - things might | |
457 | * have reshuffled */ | |
458 | jnext = j; | |
459 | dnprintable = dvname; | |
460 | break; | |
461 | } | |
462 | if (jnext == 0) | |
463 | continue; | |
464 | } else if (strcmp(dv->devname, "missing") == 0) { | |
465 | if (dv->disposition != 'a' || dv->re_add == 0) { | |
466 | fprintf(stderr, Name ": 'missing' only meaningful " | |
467 | "with --re-add\n"); | |
468 | return 1; | |
469 | } | |
470 | if (add_devlist == NULL) | |
471 | add_devlist = conf_get_devs(); | |
472 | if (add_devlist == NULL) { | |
473 | fprintf(stderr, Name ": no devices to scan for missing members."); | |
474 | continue; | |
475 | } | |
476 | add_dev = add_devlist->devname; | |
477 | add_devlist = add_devlist->next; | |
478 | if (add_devlist != NULL) | |
479 | next = dv; | |
480 | if (stat(add_dev, &stb) < 0) | |
481 | continue; | |
482 | } else if (strchr(dv->devname, '/') == NULL && | |
483 | strchr(dv->devname, ':') == NULL && | |
484 | strlen(dv->devname) < 50) { | |
485 | /* Assume this is a kernel-internal name like 'sda1' */ | |
486 | int found = 0; | |
487 | char dname[55]; | |
488 | if (dv->disposition != 'r' && dv->disposition != 'f') { | |
489 | fprintf(stderr, Name ": %s only meaningful " | |
490 | "with -r or -f, not -%c\n", | |
491 | dv->devname, dv->disposition); | |
492 | return 1; | |
493 | } | |
494 | ||
495 | sprintf(dname, "dev-%s", dv->devname); | |
496 | sysfd = sysfs_open(fd2devnum(fd), dname, "block/dev"); | |
497 | if (sysfd >= 0) { | |
498 | char dn[20]; | |
499 | int mj,mn; | |
500 | if (sysfs_fd_get_str(sysfd, dn, 20) > 0 && | |
501 | sscanf(dn, "%d:%d", &mj,&mn) == 2) { | |
502 | stb.st_rdev = makedev(mj,mn); | |
503 | found = 1; | |
504 | } | |
505 | close(sysfd); | |
506 | sysfd = -1; | |
507 | } | |
508 | if (!found) { | |
509 | sysfd = sysfs_open(fd2devnum(fd), dname, "state"); | |
510 | if (sysfd < 0) { | |
511 | fprintf(stderr, Name ": %s does not appear " | |
512 | "to be a component of %s\n", | |
513 | dv->devname, devname); | |
514 | return 1; | |
515 | } | |
516 | } | |
517 | } else { | |
518 | j = 0; | |
519 | ||
520 | tfd = dev_open(dv->devname, O_RDONLY); | |
521 | if (tfd < 0 && dv->disposition == 'r' && | |
522 | lstat(dv->devname, &stb) == 0) | |
523 | /* Be happy, the lstat worked, that is | |
524 | * enough for --remove | |
525 | */ | |
526 | ; | |
527 | else { | |
528 | if (tfd < 0 || fstat(tfd, &stb) != 0) { | |
529 | fprintf(stderr, Name ": cannot find %s: %s\n", | |
530 | dv->devname, strerror(errno)); | |
531 | if (tfd >= 0) | |
532 | close(tfd); | |
533 | return 1; | |
534 | } | |
535 | close(tfd); | |
536 | tfd = -1; | |
537 | } | |
538 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
539 | fprintf(stderr, Name ": %s is not a " | |
540 | "block device.\n", | |
541 | dv->devname); | |
542 | return 1; | |
543 | } | |
544 | } | |
545 | switch(dv->disposition){ | |
546 | default: | |
547 | fprintf(stderr, Name ": internal error - devmode[%s]=%d\n", | |
548 | dv->devname, dv->disposition); | |
549 | return 1; | |
550 | case 'a': | |
551 | /* add the device */ | |
552 | if (subarray) { | |
553 | fprintf(stderr, Name ": Cannot add disks to a" | |
554 | " \'member\' array, perform this" | |
555 | " operation on the parent container\n"); | |
556 | return 1; | |
557 | } | |
558 | /* Make sure it isn't in use (in 2.6 or later) */ | |
559 | tfd = dev_open(add_dev, O_RDONLY|O_EXCL|O_DIRECT); | |
560 | if (tfd < 0 && add_dev != dv->devname) | |
561 | continue; | |
562 | if (tfd < 0) { | |
563 | fprintf(stderr, Name ": Cannot open %s: %s\n", | |
564 | dv->devname, strerror(errno)); | |
565 | return 1; | |
566 | } | |
567 | ||
568 | st = dup_super(tst); | |
569 | ||
570 | if (array.not_persistent==0) | |
571 | st->ss->load_super(st, tfd, NULL); | |
572 | ||
573 | if (add_dev == dv->devname) { | |
574 | if (!get_dev_size(tfd, dv->devname, &ldsize)) { | |
575 | close(tfd); | |
576 | return 1; | |
577 | } | |
578 | } else if (!get_dev_size(tfd, NULL, &ldsize)) { | |
579 | close(tfd); | |
580 | tfd = -1; | |
581 | continue; | |
582 | } | |
583 | ||
584 | if (!tst->ss->external && | |
585 | array.major_version == 0 && | |
586 | md_get_version(fd)%100 < 2) { | |
587 | close(tfd); | |
588 | tfd = -1; | |
589 | if (ioctl(fd, HOT_ADD_DISK, | |
590 | (unsigned long)stb.st_rdev)==0) { | |
591 | if (verbose >= 0) | |
592 | fprintf(stderr, Name ": hot added %s\n", | |
593 | add_dev); | |
594 | continue; | |
595 | } | |
596 | ||
597 | fprintf(stderr, Name ": hot add failed for %s: %s\n", | |
598 | add_dev, strerror(errno)); | |
599 | return 1; | |
600 | } | |
601 | ||
602 | if (array.not_persistent == 0 || tst->ss->external) { | |
603 | ||
604 | /* need to find a sample superblock to copy, and | |
605 | * a spare slot to use. | |
606 | * For 'external' array (well, container based), | |
607 | * We can just load the metadata for the array. | |
608 | */ | |
609 | if (tst->sb) | |
610 | /* already loaded */; | |
611 | else if (tst->ss->external) { | |
612 | tst->ss->load_super(tst, fd, NULL); | |
613 | } else for (j = 0; j < tst->max_devs; j++) { | |
614 | char *dev; | |
615 | int dfd; | |
616 | disc.number = j; | |
617 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
618 | continue; | |
619 | if (disc.major==0 && disc.minor==0) | |
620 | continue; | |
621 | if ((disc.state & 4)==0) continue; /* sync */ | |
622 | /* Looks like a good device to try */ | |
623 | dev = map_dev(disc.major, disc.minor, 1); | |
624 | if (!dev) continue; | |
625 | dfd = dev_open(dev, O_RDONLY); | |
626 | if (dfd < 0) continue; | |
627 | if (tst->ss->load_super(tst, dfd, | |
628 | NULL)) { | |
629 | close(dfd); | |
630 | continue; | |
631 | } | |
632 | close(dfd); | |
633 | break; | |
634 | } | |
635 | /* FIXME this is a bad test to be using */ | |
636 | if (!tst->sb) { | |
637 | close(tfd); | |
638 | fprintf(stderr, Name ": cannot find valid superblock in this array - HELP\n"); | |
639 | return 1; | |
640 | } | |
641 | ||
642 | /* Make sure device is large enough */ | |
643 | if (tst->ss->avail_size(tst, ldsize/512) < | |
644 | array_size) { | |
645 | close(tfd); | |
646 | tfd = -1; | |
647 | if (add_dev != dv->devname) | |
648 | continue; | |
649 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
650 | dv->devname); | |
651 | return 1; | |
652 | } | |
653 | ||
654 | /* Possibly this device was recently part of the array | |
655 | * and was temporarily removed, and is now being re-added. | |
656 | * If so, we can simply re-add it. | |
657 | */ | |
658 | tst->ss->uuid_from_super(tst, duuid); | |
659 | ||
660 | /* re-add doesn't work for version-1 superblocks | |
661 | * before 2.6.18 :-( | |
662 | */ | |
663 | if (array.major_version == 1 && | |
664 | get_linux_version() <= 2006018) | |
665 | ; | |
666 | else if (st->sb) { | |
667 | struct mdinfo mdi; | |
668 | st->ss->getinfo_super(st, &mdi, NULL); | |
669 | st->ss->uuid_from_super(st, ouuid); | |
670 | if ((mdi.disk.state & (1<<MD_DISK_ACTIVE)) && | |
671 | !(mdi.disk.state & (1<<MD_DISK_FAULTY)) && | |
672 | memcmp(duuid, ouuid, sizeof(ouuid))==0) { | |
673 | /* look like it is worth a try. Need to | |
674 | * make sure kernel will accept it though. | |
675 | */ | |
676 | disc.number = mdi.disk.number; | |
677 | if (ioctl(fd, GET_DISK_INFO, &disc) != 0 | |
678 | || disc.major != 0 || disc.minor != 0 | |
679 | || !enough_fd(fd)) | |
680 | goto skip_re_add; | |
681 | disc.major = major(stb.st_rdev); | |
682 | disc.minor = minor(stb.st_rdev); | |
683 | disc.number = mdi.disk.number; | |
684 | disc.raid_disk = mdi.disk.raid_disk; | |
685 | disc.state = mdi.disk.state; | |
686 | if (dv->writemostly == 1) | |
687 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
688 | if (dv->writemostly == 2) | |
689 | disc.state &= ~(1 << MD_DISK_WRITEMOSTLY); | |
690 | remove_partitions(tfd); | |
691 | close(tfd); | |
692 | tfd = -1; | |
693 | /* don't even try if disk is marked as faulty */ | |
694 | errno = 0; | |
695 | if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) { | |
696 | if (verbose >= 0) | |
697 | fprintf(stderr, Name ": re-added %s\n", add_dev); | |
698 | count++; | |
699 | continue; | |
700 | } | |
701 | if (errno == ENOMEM || errno == EROFS) { | |
702 | fprintf(stderr, Name ": add new device failed for %s: %s\n", | |
703 | add_dev, strerror(errno)); | |
704 | if (add_dev != dv->devname) | |
705 | continue; | |
706 | return 1; | |
707 | } | |
708 | skip_re_add: | |
709 | re_add_failed = 1; | |
710 | } | |
711 | } | |
712 | if (add_dev != dv->devname) { | |
713 | if (verbose > 0) | |
714 | fprintf(stderr, Name | |
715 | ": --re-add for %s to %s is not possible\n", | |
716 | add_dev, devname); | |
717 | if (tfd >= 0) { | |
718 | close(tfd); | |
719 | tfd = -1; | |
720 | } | |
721 | continue; | |
722 | } | |
723 | if (dv->re_add) { | |
724 | if (tfd >= 0) | |
725 | close(tfd); | |
726 | fprintf(stderr, Name | |
727 | ": --re-add for %s to %s is not possible\n", | |
728 | dv->devname, devname); | |
729 | return 1; | |
730 | } | |
731 | if (re_add_failed) { | |
732 | fprintf(stderr, Name ": %s reports being an active member for %s, but a --re-add fails.\n", | |
733 | dv->devname, devname); | |
734 | fprintf(stderr, Name ": not performing --add as that would convert %s in to a spare.\n", | |
735 | dv->devname); | |
736 | fprintf(stderr, Name ": To make this a spare, use \"mdadm --zero-superblock %s\" first.\n", | |
737 | dv->devname); | |
738 | if (tfd >= 0) | |
739 | close(tfd); | |
740 | return 1; | |
741 | } | |
742 | } else { | |
743 | /* non-persistent. Must ensure that new drive | |
744 | * is at least array.size big. | |
745 | */ | |
746 | if (ldsize/512 < array_size) { | |
747 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
748 | dv->devname); | |
749 | if (tfd >= 0) | |
750 | close(tfd); | |
751 | return 1; | |
752 | } | |
753 | } | |
754 | /* committed to really trying this device now*/ | |
755 | if (tfd >= 0) { | |
756 | remove_partitions(tfd); | |
757 | close(tfd); | |
758 | tfd = -1; | |
759 | } | |
760 | /* in 2.6.17 and earlier, version-1 superblocks won't | |
761 | * use the number we write, but will choose a free number. | |
762 | * we must choose the same free number, which requires | |
763 | * starting at 'raid_disks' and counting up | |
764 | */ | |
765 | for (j = array.raid_disks; j< tst->max_devs; j++) { | |
766 | disc.number = j; | |
767 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
768 | break; | |
769 | if (disc.major==0 && disc.minor==0) | |
770 | break; | |
771 | if (disc.state & 8) /* removed */ | |
772 | break; | |
773 | } | |
774 | disc.major = major(stb.st_rdev); | |
775 | disc.minor = minor(stb.st_rdev); | |
776 | disc.number =j; | |
777 | disc.state = 0; | |
778 | if (array.not_persistent==0 || tst->ss->external) { | |
779 | int dfd; | |
780 | if (dv->writemostly == 1) | |
781 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
782 | dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT); | |
783 | if (tst->ss->add_to_super(tst, &disc, dfd, | |
784 | dv->devname)) { | |
785 | close(dfd); | |
786 | return 1; | |
787 | } | |
788 | /* write_init_super will close 'dfd' */ | |
789 | if (tst->ss->external) | |
790 | /* mdmon will write the metadata */ | |
791 | close(dfd); | |
792 | else if (tst->ss->write_init_super(tst)) | |
793 | return 1; | |
794 | } else if (dv->re_add) { | |
795 | /* this had better be raid1. | |
796 | * As we are "--re-add"ing we must find a spare slot | |
797 | * to fill. | |
798 | */ | |
799 | char *used = malloc(array.raid_disks); | |
800 | memset(used, 0, array.raid_disks); | |
801 | for (j=0; j< tst->max_devs; j++) { | |
802 | mdu_disk_info_t disc2; | |
803 | disc2.number = j; | |
804 | if (ioctl(fd, GET_DISK_INFO, &disc2)) | |
805 | continue; | |
806 | if (disc2.major==0 && disc2.minor==0) | |
807 | continue; | |
808 | if (disc2.state & 8) /* removed */ | |
809 | continue; | |
810 | if (disc2.raid_disk < 0) | |
811 | continue; | |
812 | if (disc2.raid_disk > array.raid_disks) | |
813 | continue; | |
814 | used[disc2.raid_disk] = 1; | |
815 | } | |
816 | for (j=0 ; j<array.raid_disks; j++) | |
817 | if (!used[j]) { | |
818 | disc.raid_disk = j; | |
819 | disc.state |= (1<<MD_DISK_SYNC); | |
820 | break; | |
821 | } | |
822 | free(used); | |
823 | } | |
824 | if (dv->writemostly == 1) | |
825 | disc.state |= (1 << MD_DISK_WRITEMOSTLY); | |
826 | if (tst->ss->external) { | |
827 | /* add a disk to an external metadata container | |
828 | * only if mdmon is around to see it | |
829 | */ | |
830 | struct mdinfo new_mdi; | |
831 | struct mdinfo *sra; | |
832 | int container_fd; | |
833 | int devnum = fd2devnum(fd); | |
834 | ||
835 | container_fd = open_dev_excl(devnum); | |
836 | if (container_fd < 0) { | |
837 | fprintf(stderr, Name ": add failed for %s:" | |
838 | " could not get exclusive access to container\n", | |
839 | dv->devname); | |
840 | return 1; | |
841 | } | |
842 | ||
843 | if (!mdmon_running(devnum)) { | |
844 | fprintf(stderr, Name ": add failed for %s: mdmon not running\n", | |
845 | dv->devname); | |
846 | close(container_fd); | |
847 | return 1; | |
848 | } | |
849 | ||
850 | sra = sysfs_read(container_fd, -1, 0); | |
851 | if (!sra) { | |
852 | fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n", | |
853 | dv->devname); | |
854 | close(container_fd); | |
855 | return 1; | |
856 | } | |
857 | sra->array.level = LEVEL_CONTAINER; | |
858 | /* Need to set data_offset and component_size */ | |
859 | tst->ss->getinfo_super(tst, &new_mdi, NULL); | |
860 | new_mdi.disk.major = disc.major; | |
861 | new_mdi.disk.minor = disc.minor; | |
862 | new_mdi.recovery_start = 0; | |
863 | if (sysfs_add_disk(sra, &new_mdi, 0) != 0) { | |
864 | fprintf(stderr, Name ": add new device to external metadata" | |
865 | " failed for %s\n", dv->devname); | |
866 | close(container_fd); | |
867 | return 1; | |
868 | } | |
869 | ping_monitor(devnum2devname(devnum)); | |
870 | sysfs_free(sra); | |
871 | close(container_fd); | |
872 | } else if (ioctl(fd, ADD_NEW_DISK, &disc)) { | |
873 | fprintf(stderr, Name ": add new device failed for %s as %d: %s\n", | |
874 | dv->devname, j, strerror(errno)); | |
875 | return 1; | |
876 | } | |
877 | if (verbose >= 0) | |
878 | fprintf(stderr, Name ": added %s\n", dv->devname); | |
879 | break; | |
880 | ||
881 | case 'r': | |
882 | /* hot remove */ | |
883 | if (subarray) { | |
884 | fprintf(stderr, Name ": Cannot remove disks from a" | |
885 | " \'member\' array, perform this" | |
886 | " operation on the parent container\n"); | |
887 | if (sysfd >= 0) | |
888 | close(sysfd); | |
889 | return 1; | |
890 | } | |
891 | if (tst->ss->external) { | |
892 | /* To remove a device from a container, we must | |
893 | * check that it isn't in use in an array. | |
894 | * This involves looking in the 'holders' | |
895 | * directory - there must be just one entry, | |
896 | * the container. | |
897 | * To ensure that it doesn't get used as a | |
898 | * hold spare while we are checking, we | |
899 | * get an O_EXCL open on the container | |
900 | */ | |
901 | int dnum = fd2devnum(fd); | |
902 | lfd = open_dev_excl(dnum); | |
903 | if (lfd < 0) { | |
904 | fprintf(stderr, Name | |
905 | ": Cannot get exclusive access " | |
906 | " to container - odd\n"); | |
907 | if (sysfd >= 0) | |
908 | close(sysfd); | |
909 | return 1; | |
910 | } | |
911 | /* in the detached case it is not possible to | |
912 | * check if we are the unique holder, so just | |
913 | * rely on the 'detached' checks | |
914 | */ | |
915 | if (strcmp(dv->devname, "detached") == 0 || | |
916 | sysfd >= 0 || | |
917 | sysfs_unique_holder(dnum, stb.st_rdev)) | |
918 | /* pass */; | |
919 | else { | |
920 | fprintf(stderr, Name | |
921 | ": %s is %s, cannot remove.\n", | |
922 | dnprintable, | |
923 | errno == EEXIST ? "still in use": | |
924 | "not a member"); | |
925 | close(lfd); | |
926 | return 1; | |
927 | } | |
928 | } | |
929 | /* FIXME check that it is a current member */ | |
930 | if (sysfd >= 0) { | |
931 | /* device has been removed and we don't know | |
932 | * the major:minor number | |
933 | */ | |
934 | int n = write(sysfd, "remove", 6); | |
935 | if (n != 6) | |
936 | err = -1; | |
937 | else | |
938 | err = 0; | |
939 | close(sysfd); | |
940 | sysfd = -1; | |
941 | } else { | |
942 | err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev); | |
943 | if (err && errno == ENODEV) { | |
944 | /* Old kernels rejected this if no personality | |
945 | * registered */ | |
946 | struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS); | |
947 | struct mdinfo *dv = NULL; | |
948 | if (sra) | |
949 | dv = sra->devs; | |
950 | for ( ; dv ; dv=dv->next) | |
951 | if (dv->disk.major == (int)major(stb.st_rdev) && | |
952 | dv->disk.minor == (int)minor(stb.st_rdev)) | |
953 | break; | |
954 | if (dv) | |
955 | err = sysfs_set_str(sra, dv, | |
956 | "state", "remove"); | |
957 | else | |
958 | err = -1; | |
959 | if (sra) | |
960 | sysfs_free(sra); | |
961 | } | |
962 | } | |
963 | if (err) { | |
964 | fprintf(stderr, Name ": hot remove failed " | |
965 | "for %s: %s\n", dnprintable, | |
966 | strerror(errno)); | |
967 | if (lfd >= 0) | |
968 | close(lfd); | |
969 | return 1; | |
970 | } | |
971 | if (tst->ss->external) { | |
972 | /* | |
973 | * Before dropping our exclusive open we make an | |
974 | * attempt at preventing mdmon from seeing an | |
975 | * 'add' event before reconciling this 'remove' | |
976 | * event. | |
977 | */ | |
978 | char *name = devnum2devname(fd2devnum(fd)); | |
979 | ||
980 | if (!name) { | |
981 | fprintf(stderr, Name ": unable to get container name\n"); | |
982 | return 1; | |
983 | } | |
984 | ||
985 | ping_manager(name); | |
986 | free(name); | |
987 | } | |
988 | if (lfd >= 0) | |
989 | close(lfd); | |
990 | count++; | |
991 | if (verbose >= 0) | |
992 | fprintf(stderr, Name ": hot removed %s from %s\n", | |
993 | dnprintable, devname); | |
994 | break; | |
995 | ||
996 | case 'f': /* set faulty */ | |
997 | /* FIXME check current member */ | |
998 | if ((sysfd >= 0 && write(sysfd, "faulty", 6) != 6) || | |
999 | (sysfd < 0 && ioctl(fd, SET_DISK_FAULTY, | |
1000 | (unsigned long) stb.st_rdev))) { | |
1001 | fprintf(stderr, Name ": set device faulty failed for %s: %s\n", | |
1002 | dnprintable, strerror(errno)); | |
1003 | if (sysfd >= 0) | |
1004 | close(sysfd); | |
1005 | return 1; | |
1006 | } | |
1007 | if (sysfd >= 0) | |
1008 | close(sysfd); | |
1009 | sysfd = -1; | |
1010 | count++; | |
1011 | if (verbose >= 0) | |
1012 | fprintf(stderr, Name ": set %s faulty in %s\n", | |
1013 | dnprintable, devname); | |
1014 | break; | |
1015 | } | |
1016 | } | |
1017 | if (test && count == 0) | |
1018 | return 2; | |
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | int autodetect(void) | |
1023 | { | |
1024 | /* Open any md device, and issue the RAID_AUTORUN ioctl */ | |
1025 | int rv = 1; | |
1026 | int fd = dev_open("9:0", O_RDONLY); | |
1027 | if (fd >= 0) { | |
1028 | if (ioctl(fd, RAID_AUTORUN, 0) == 0) | |
1029 | rv = 0; | |
1030 | close(fd); | |
1031 | } | |
1032 | return rv; | |
1033 | } | |
1034 | ||
1035 | int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident *ident, int quiet) | |
1036 | { | |
1037 | struct supertype supertype, *st = &supertype; | |
1038 | int fd, rv = 2; | |
1039 | ||
1040 | memset(st, 0, sizeof(*st)); | |
1041 | ||
1042 | fd = open_subarray(dev, subarray, st, quiet); | |
1043 | if (fd < 0) | |
1044 | return 2; | |
1045 | ||
1046 | if (!st->ss->update_subarray) { | |
1047 | if (!quiet) | |
1048 | fprintf(stderr, | |
1049 | Name ": Operation not supported for %s metadata\n", | |
1050 | st->ss->name); | |
1051 | goto free_super; | |
1052 | } | |
1053 | ||
1054 | if (mdmon_running(st->devnum)) | |
1055 | st->update_tail = &st->updates; | |
1056 | ||
1057 | rv = st->ss->update_subarray(st, subarray, update, ident); | |
1058 | ||
1059 | if (rv) { | |
1060 | if (!quiet) | |
1061 | fprintf(stderr, Name ": Failed to update %s of subarray-%s in %s\n", | |
1062 | update, subarray, dev); | |
1063 | } else if (st->update_tail) | |
1064 | flush_metadata_updates(st); | |
1065 | else | |
1066 | st->ss->sync_metadata(st); | |
1067 | ||
1068 | if (rv == 0 && strcmp(update, "name") == 0 && !quiet) | |
1069 | fprintf(stderr, | |
1070 | Name ": Updated subarray-%s name from %s, UUIDs may have changed\n", | |
1071 | subarray, dev); | |
1072 | ||
1073 | free_super: | |
1074 | st->ss->free_super(st); | |
1075 | close(fd); | |
1076 | ||
1077 | return rv; | |
1078 | } | |
1079 | #endif |