]>
Commit | Line | Data |
---|---|---|
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 | is_subarray(mdi->text_version)) { | |
60 | char vers[64]; | |
61 | strcpy(vers, "external:"); | |
62 | strcat(vers, mdi->text_version); | |
63 | if (readonly > 0) { | |
64 | int rv; | |
65 | /* We set readonly ourselves. */ | |
66 | vers[9] = '-'; | |
67 | sysfs_set_str(mdi, NULL, "metadata_version", vers); | |
68 | ||
69 | close(fd); | |
70 | rv = sysfs_set_str(mdi, NULL, "array_state", "readonly"); | |
71 | ||
72 | if (rv < 0) { | |
73 | fprintf(stderr, Name ": failed to set readonly for %s: %s\n", | |
74 | devname, strerror(errno)); | |
75 | ||
76 | vers[9] = mdi->text_version[0]; | |
77 | sysfs_set_str(mdi, NULL, "metadata_version", vers); | |
78 | return 1; | |
79 | } | |
80 | } else { | |
81 | char *cp; | |
82 | /* We cannot set read/write - must signal mdmon */ | |
83 | vers[9] = '/'; | |
84 | sysfs_set_str(mdi, NULL, "metadata_version", vers); | |
85 | ||
86 | cp = strchr(vers+10, '/'); | |
87 | if (*cp) | |
88 | *cp = 0; | |
89 | ping_monitor(vers+10); | |
90 | if (mdi->array.level <= 0) | |
91 | sysfs_set_str(mdi, NULL, "array_state", "active"); | |
92 | } | |
93 | return 0; | |
94 | } | |
95 | #endif | |
96 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
97 | fprintf(stderr, Name ": %s does not appear to be active.\n", | |
98 | devname); | |
99 | return 1; | |
100 | } | |
101 | ||
102 | if (readonly>0) { | |
103 | if (ioctl(fd, STOP_ARRAY_RO, NULL)) { | |
104 | fprintf(stderr, Name ": failed to set readonly for %s: %s\n", | |
105 | devname, strerror(errno)); | |
106 | return 1; | |
107 | } | |
108 | } else if (readonly < 0) { | |
109 | if (ioctl(fd, RESTART_ARRAY_RW, NULL)) { | |
110 | fprintf(stderr, Name ": failed to set writable for %s: %s\n", | |
111 | devname, strerror(errno)); | |
112 | return 1; | |
113 | } | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | ||
118 | #ifndef MDASSEMBLE | |
119 | ||
120 | static void remove_devices(int devnum, char *path) | |
121 | { | |
122 | /* | |
123 | * Remove names at 'path' - possibly with | |
124 | * partition suffixes - which link to the 'standard' | |
125 | * name for devnum. These were probably created | |
126 | * by mdadm when the array was assembled. | |
127 | */ | |
128 | char base[40]; | |
129 | char *path2; | |
130 | char link[1024]; | |
131 | int n; | |
132 | int part; | |
133 | char *be; | |
134 | char *pe; | |
135 | ||
136 | if (!path) | |
137 | return; | |
138 | ||
139 | if (devnum >= 0) | |
140 | sprintf(base, "/dev/md%d", devnum); | |
141 | else | |
142 | sprintf(base, "/dev/md_d%d", -1-devnum); | |
143 | be = base + strlen(base); | |
144 | ||
145 | path2 = malloc(strlen(path)+20); | |
146 | strcpy(path2, path); | |
147 | pe = path2 + strlen(path2); | |
148 | ||
149 | for (part = 0; part < 16; part++) { | |
150 | if (part) { | |
151 | sprintf(be, "p%d", part); | |
152 | ||
153 | if (isdigit(pe[-1])) | |
154 | sprintf(pe, "p%d", part); | |
155 | else | |
156 | sprintf(pe, "%d", part); | |
157 | } | |
158 | n = readlink(path2, link, sizeof(link)); | |
159 | if (n && (int)strlen(base) == n && | |
160 | strncmp(link, base, n) == 0) | |
161 | unlink(path2); | |
162 | } | |
163 | free(path2); | |
164 | } | |
165 | ||
166 | ||
167 | int Manage_runstop(char *devname, int fd, int runstop, int quiet) | |
168 | { | |
169 | /* Run or stop the array. array must already be configured | |
170 | * required >= 0.90.0 | |
171 | * Only print failure messages if quiet == 0; | |
172 | * quiet > 0 means really be quiet | |
173 | * quiet < 0 means we will try again if it fails. | |
174 | */ | |
175 | mdu_param_t param; /* unused */ | |
176 | ||
177 | if (runstop == -1 && md_get_version(fd) < 9000) { | |
178 | if (ioctl(fd, STOP_MD, 0)) { | |
179 | if (quiet == 0) fprintf(stderr, | |
180 | Name ": stopping device %s " | |
181 | "failed: %s\n", | |
182 | devname, strerror(errno)); | |
183 | return 1; | |
184 | } | |
185 | } | |
186 | ||
187 | if (md_get_version(fd) < 9000) { | |
188 | fprintf(stderr, Name ": need md driver version 0.90.0 or later\n"); | |
189 | return 1; | |
190 | } | |
191 | /* | |
192 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
193 | fprintf(stderr, Name ": %s does not appear to be active.\n", | |
194 | devname); | |
195 | return 1; | |
196 | } | |
197 | */ | |
198 | if (runstop>0) { | |
199 | if (ioctl(fd, RUN_ARRAY, ¶m)) { | |
200 | fprintf(stderr, Name ": failed to run array %s: %s\n", | |
201 | devname, strerror(errno)); | |
202 | return 1; | |
203 | } | |
204 | if (quiet <= 0) | |
205 | fprintf(stderr, Name ": started %s\n", devname); | |
206 | } else if (runstop < 0){ | |
207 | struct map_ent *map = NULL; | |
208 | struct stat stb; | |
209 | struct mdinfo *mdi; | |
210 | int devnum; | |
211 | /* If this is an mdmon managed array, just write 'inactive' | |
212 | * to the array state and let mdmon clear up. | |
213 | */ | |
214 | devnum = fd2devnum(fd); | |
215 | mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION); | |
216 | if (mdi && | |
217 | mdi->array.level > 0 && | |
218 | is_subarray(mdi->text_version)) { | |
219 | /* This is mdmon managed. */ | |
220 | close(fd); | |
221 | if (sysfs_set_str(mdi, NULL, | |
222 | "array_state", "inactive") < 0) { | |
223 | if (quiet == 0) | |
224 | fprintf(stderr, Name | |
225 | ": failed to stop array %s: %s\n", | |
226 | devname, strerror(errno)); | |
227 | return 1; | |
228 | } | |
229 | ||
230 | /* Give monitor a chance to act */ | |
231 | ping_monitor(mdi->text_version); | |
232 | ||
233 | fd = open(devname, O_RDONLY); | |
234 | } else if (mdi && | |
235 | mdi->array.major_version == -1 && | |
236 | mdi->array.minor_version == -2 && | |
237 | !is_subarray(mdi->text_version)) { | |
238 | struct mdstat_ent *mds, *m; | |
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 | /* now check that there are no existing arrays | |
246 | * which are members of this array | |
247 | */ | |
248 | mds = mdstat_read(0, 0); | |
249 | for (m=mds; m; m=m->next) | |
250 | if (m->metadata_version && | |
251 | strncmp(m->metadata_version, "external:", 9)==0 && | |
252 | is_subarray(m->metadata_version+9) && | |
253 | devname2devnum(m->metadata_version+10) == devnum) { | |
254 | if (!quiet) | |
255 | fprintf(stderr, Name | |
256 | ": Cannot stop container %s: " | |
257 | "member %s still active\n", | |
258 | devname, m->dev); | |
259 | free_mdstat(mds); | |
260 | if (mdi) | |
261 | sysfs_free(mdi); | |
262 | return 1; | |
263 | } | |
264 | } | |
265 | ||
266 | if (fd >= 0 && ioctl(fd, STOP_ARRAY, NULL)) { | |
267 | if (quiet == 0) { | |
268 | fprintf(stderr, Name | |
269 | ": failed to stop array %s: %s\n", | |
270 | devname, strerror(errno)); | |
271 | if (errno == EBUSY) | |
272 | fprintf(stderr, "Perhaps a running " | |
273 | "process, mounted filesystem " | |
274 | "or active volume group?\n"); | |
275 | } | |
276 | if (mdi) | |
277 | sysfs_free(mdi); | |
278 | return 1; | |
279 | } | |
280 | /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array | |
281 | * was stopped, so We'll do it here just to be sure. Drop any | |
282 | * partitions as well... | |
283 | */ | |
284 | if (fd >= 0) | |
285 | ioctl(fd, BLKRRPART, 0); | |
286 | if (mdi) | |
287 | sysfs_uevent(mdi, "change"); | |
288 | ||
289 | ||
290 | if (devnum != NoMdDev && | |
291 | (stat("/dev/.udev", &stb) != 0 || | |
292 | check_env("MDADM_NO_UDEV"))) { | |
293 | struct map_ent *mp = map_by_devnum(&map, devnum); | |
294 | remove_devices(devnum, mp ? mp->path : NULL); | |
295 | } | |
296 | ||
297 | ||
298 | if (quiet <= 0) | |
299 | fprintf(stderr, Name ": stopped %s\n", devname); | |
300 | map_lock(&map); | |
301 | map_remove(&map, devnum); | |
302 | map_unlock(&map); | |
303 | } | |
304 | return 0; | |
305 | } | |
306 | ||
307 | int Manage_resize(char *devname, int fd, long long size, int raid_disks) | |
308 | { | |
309 | mdu_array_info_t info; | |
310 | if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) { | |
311 | fprintf(stderr, Name ": Cannot get array information for %s: %s\n", | |
312 | devname, strerror(errno)); | |
313 | return 1; | |
314 | } | |
315 | if (size >= 0) | |
316 | info.size = size; | |
317 | if (raid_disks > 0) | |
318 | info.raid_disks = raid_disks; | |
319 | if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) { | |
320 | fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n", | |
321 | devname, strerror(errno)); | |
322 | return 1; | |
323 | } | |
324 | return 0; | |
325 | } | |
326 | ||
327 | int Manage_subdevs(char *devname, int fd, | |
328 | struct mddev_dev *devlist, int verbose, int test, | |
329 | char *update) | |
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 | * For 'f' and 'r', the device can also be a kernel-internal | |
343 | * name such as 'sdb'. | |
344 | */ | |
345 | struct mddev_dev *add_devlist = NULL; | |
346 | mdu_array_info_t array; | |
347 | mdu_disk_info_t disc; | |
348 | unsigned long long array_size; | |
349 | struct mddev_dev *dv, *next = NULL; | |
350 | struct stat stb; | |
351 | int j, jnext = 0; | |
352 | int tfd = -1; | |
353 | struct supertype *st, *tst; | |
354 | char *subarray = NULL; | |
355 | int duuid[4]; | |
356 | int ouuid[4]; | |
357 | int lfd = -1; | |
358 | int sysfd = -1; | |
359 | int count = 0; /* number of actions taken */ | |
360 | ||
361 | if (ioctl(fd, GET_ARRAY_INFO, &array)) { | |
362 | fprintf(stderr, Name ": cannot get array info for %s\n", | |
363 | devname); | |
364 | return 1; | |
365 | } | |
366 | ||
367 | /* array.size is only 32 bit and may be truncated. | |
368 | * So read from sysfs if possible, and record number of sectors | |
369 | */ | |
370 | ||
371 | array_size = get_component_size(fd); | |
372 | if (array_size <= 0) | |
373 | array_size = array.size * 2; | |
374 | ||
375 | tst = super_by_fd(fd, &subarray); | |
376 | if (!tst) { | |
377 | fprintf(stderr, Name ": unsupport array - version %d.%d\n", | |
378 | array.major_version, array.minor_version); | |
379 | return 1; | |
380 | } | |
381 | ||
382 | stb.st_rdev = 0; | |
383 | for (dv = devlist, j=0 ; dv; dv = next, j = jnext) { | |
384 | unsigned long long ldsize; | |
385 | char dvname[20]; | |
386 | char *dnprintable = dv->devname; | |
387 | char *add_dev = dv->devname; | |
388 | int err; | |
389 | int re_add_failed = 0; | |
390 | ||
391 | next = dv->next; | |
392 | jnext = 0; | |
393 | ||
394 | if (strcmp(dv->devname, "failed")==0 || | |
395 | strcmp(dv->devname, "faulty")==0) { | |
396 | if (dv->disposition != 'r') { | |
397 | fprintf(stderr, Name ": %s only meaningful " | |
398 | "with -r, not -%c\n", | |
399 | dv->devname, dv->disposition); | |
400 | return 1; | |
401 | } | |
402 | for (; j < array.raid_disks + array.nr_disks ; j++) { | |
403 | unsigned dev; | |
404 | disc.number = j; | |
405 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
406 | continue; | |
407 | if (disc.major == 0 && disc.minor == 0) | |
408 | continue; | |
409 | if ((disc.state & 1) == 0) /* faulty */ | |
410 | continue; | |
411 | dev = makedev(disc.major, disc.minor); | |
412 | if (stb.st_rdev == dev) | |
413 | /* already did that one */ | |
414 | continue; | |
415 | stb.st_rdev = dev; | |
416 | next = dv; | |
417 | /* same slot again next time - things might | |
418 | * have reshuffled */ | |
419 | jnext = j; | |
420 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
421 | dnprintable = dvname; | |
422 | break; | |
423 | } | |
424 | if (next != dv) | |
425 | continue; | |
426 | } else if (strcmp(dv->devname, "detached") == 0) { | |
427 | if (dv->disposition != 'r' && dv->disposition != 'f') { | |
428 | fprintf(stderr, Name ": %s only meaningful " | |
429 | "with -r of -f, not -%c\n", | |
430 | dv->devname, dv->disposition); | |
431 | return 1; | |
432 | } | |
433 | for (; j < array.raid_disks + array.nr_disks; j++) { | |
434 | int sfd; | |
435 | unsigned dev; | |
436 | disc.number = j; | |
437 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
438 | continue; | |
439 | if (disc.major == 0 && disc.minor == 0) | |
440 | continue; | |
441 | sprintf(dvname,"%d:%d", disc.major, disc.minor); | |
442 | sfd = dev_open(dvname, O_RDONLY); | |
443 | if (sfd >= 0) { | |
444 | close(sfd); | |
445 | continue; | |
446 | } | |
447 | if (dv->disposition == 'f' && | |
448 | (disc.state & 1) == 1) /* already faulty */ | |
449 | continue; | |
450 | if (errno != ENXIO) | |
451 | continue; | |
452 | dev = makedev(disc.major, disc.minor); | |
453 | if (stb.st_rdev == dev) | |
454 | /* already did that one */ | |
455 | continue; | |
456 | stb.st_rdev = dev; | |
457 | next = dv; | |
458 | /* same slot again next time - things might | |
459 | * have reshuffled */ | |
460 | jnext = j; | |
461 | dnprintable = dvname; | |
462 | break; | |
463 | } | |
464 | if (next != dv) | |
465 | continue; | |
466 | } else if (strcmp(dv->devname, "missing") == 0) { | |
467 | if (dv->disposition != 'a' || dv->re_add == 0) { | |
468 | fprintf(stderr, Name ": 'missing' only meaningful " | |
469 | "with --re-add\n"); | |
470 | return 1; | |
471 | } | |
472 | if (add_devlist == NULL) | |
473 | add_devlist = conf_get_devs(); | |
474 | if (add_devlist == NULL) { | |
475 | fprintf(stderr, Name ": no devices to scan for missing members."); | |
476 | continue; | |
477 | } | |
478 | add_dev = add_devlist->devname; | |
479 | add_devlist = add_devlist->next; | |
480 | if (add_devlist != NULL) | |
481 | next = dv; | |
482 | if (stat(add_dev, &stb) < 0) | |
483 | continue; | |
484 | } else if (strchr(dv->devname, '/') == NULL && | |
485 | strchr(dv->devname, ':') == NULL && | |
486 | strlen(dv->devname) < 50) { | |
487 | /* Assume this is a kernel-internal name like 'sda1' */ | |
488 | int found = 0; | |
489 | char dname[55]; | |
490 | if (dv->disposition != 'r' && dv->disposition != 'f') { | |
491 | fprintf(stderr, Name ": %s only meaningful " | |
492 | "with -r or -f, not -%c\n", | |
493 | dv->devname, dv->disposition); | |
494 | return 1; | |
495 | } | |
496 | ||
497 | sprintf(dname, "dev-%s", dv->devname); | |
498 | sysfd = sysfs_open(fd2devnum(fd), dname, "block/dev"); | |
499 | if (sysfd >= 0) { | |
500 | char dn[20]; | |
501 | int mj,mn; | |
502 | if (sysfs_fd_get_str(sysfd, dn, 20) > 0 && | |
503 | sscanf(dn, "%d:%d", &mj,&mn) == 2) { | |
504 | stb.st_rdev = makedev(mj,mn); | |
505 | found = 1; | |
506 | } | |
507 | close(sysfd); | |
508 | sysfd = -1; | |
509 | } | |
510 | if (!found) { | |
511 | sysfd = sysfs_open(fd2devnum(fd), dname, "state"); | |
512 | if (sysfd < 0) { | |
513 | fprintf(stderr, Name ": %s does not appear " | |
514 | "to be a component of %s\n", | |
515 | dv->devname, devname); | |
516 | return 1; | |
517 | } | |
518 | } | |
519 | } else { | |
520 | j = 0; | |
521 | ||
522 | tfd = dev_open(dv->devname, O_RDONLY); | |
523 | if (tfd < 0 && dv->disposition == 'r' && | |
524 | lstat(dv->devname, &stb) == 0) | |
525 | /* Be happy, the lstat worked, that is | |
526 | * enough for --remove | |
527 | */ | |
528 | ; | |
529 | else { | |
530 | if (tfd < 0 || fstat(tfd, &stb) != 0) { | |
531 | fprintf(stderr, Name ": cannot find %s: %s\n", | |
532 | dv->devname, strerror(errno)); | |
533 | if (tfd >= 0) | |
534 | close(tfd); | |
535 | return 1; | |
536 | } | |
537 | close(tfd); | |
538 | tfd = -1; | |
539 | } | |
540 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
541 | fprintf(stderr, Name ": %s is not a " | |
542 | "block device.\n", | |
543 | dv->devname); | |
544 | return 1; | |
545 | } | |
546 | } | |
547 | switch(dv->disposition){ | |
548 | default: | |
549 | fprintf(stderr, Name ": internal error - devmode[%s]=%d\n", | |
550 | dv->devname, dv->disposition); | |
551 | return 1; | |
552 | case 'a': | |
553 | /* add the device */ | |
554 | if (subarray) { | |
555 | fprintf(stderr, Name ": Cannot add disks to a" | |
556 | " \'member\' array, perform this" | |
557 | " operation on the parent container\n"); | |
558 | return 1; | |
559 | } | |
560 | /* Make sure it isn't in use (in 2.6 or later) */ | |
561 | tfd = dev_open(add_dev, O_RDONLY|O_EXCL|O_DIRECT); | |
562 | if (tfd < 0 && add_dev != dv->devname) | |
563 | continue; | |
564 | if (tfd < 0) { | |
565 | fprintf(stderr, Name ": Cannot open %s: %s\n", | |
566 | dv->devname, strerror(errno)); | |
567 | return 1; | |
568 | } | |
569 | ||
570 | st = dup_super(tst); | |
571 | ||
572 | if (array.not_persistent==0) | |
573 | st->ss->load_super(st, tfd, NULL); | |
574 | ||
575 | if (add_dev == dv->devname) { | |
576 | if (!get_dev_size(tfd, dv->devname, &ldsize)) { | |
577 | close(tfd); | |
578 | return 1; | |
579 | } | |
580 | } else if (!get_dev_size(tfd, NULL, &ldsize)) { | |
581 | close(tfd); | |
582 | tfd = -1; | |
583 | continue; | |
584 | } | |
585 | ||
586 | if (!tst->ss->external && | |
587 | array.major_version == 0 && | |
588 | md_get_version(fd)%100 < 2) { | |
589 | close(tfd); | |
590 | tfd = -1; | |
591 | if (ioctl(fd, HOT_ADD_DISK, | |
592 | (unsigned long)stb.st_rdev)==0) { | |
593 | if (verbose >= 0) | |
594 | fprintf(stderr, Name ": hot added %s\n", | |
595 | add_dev); | |
596 | continue; | |
597 | } | |
598 | ||
599 | fprintf(stderr, Name ": hot add failed for %s: %s\n", | |
600 | add_dev, strerror(errno)); | |
601 | return 1; | |
602 | } | |
603 | ||
604 | if (array.not_persistent == 0 || tst->ss->external) { | |
605 | ||
606 | /* need to find a sample superblock to copy, and | |
607 | * a spare slot to use. | |
608 | * For 'external' array (well, container based), | |
609 | * We can just load the metadata for the array. | |
610 | */ | |
611 | if (tst->sb) | |
612 | /* already loaded */; | |
613 | else if (tst->ss->external) { | |
614 | tst->ss->load_container(tst, fd, NULL); | |
615 | } else for (j = 0; j < tst->max_devs; j++) { | |
616 | char *dev; | |
617 | int dfd; | |
618 | disc.number = j; | |
619 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
620 | continue; | |
621 | if (disc.major==0 && disc.minor==0) | |
622 | continue; | |
623 | if ((disc.state & 4)==0) continue; /* sync */ | |
624 | /* Looks like a good device to try */ | |
625 | dev = map_dev(disc.major, disc.minor, 1); | |
626 | if (!dev) continue; | |
627 | dfd = dev_open(dev, O_RDONLY); | |
628 | if (dfd < 0) continue; | |
629 | if (tst->ss->load_super(tst, dfd, | |
630 | NULL)) { | |
631 | close(dfd); | |
632 | continue; | |
633 | } | |
634 | close(dfd); | |
635 | break; | |
636 | } | |
637 | /* FIXME this is a bad test to be using */ | |
638 | if (!tst->sb) { | |
639 | close(tfd); | |
640 | fprintf(stderr, Name ": cannot load array metadata from %s\n", devname); | |
641 | return 1; | |
642 | } | |
643 | ||
644 | /* Make sure device is large enough */ | |
645 | if (tst->ss->avail_size(tst, ldsize/512) < | |
646 | array_size) { | |
647 | close(tfd); | |
648 | tfd = -1; | |
649 | if (add_dev != dv->devname) | |
650 | continue; | |
651 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
652 | dv->devname); | |
653 | return 1; | |
654 | } | |
655 | ||
656 | /* Possibly this device was recently part of the array | |
657 | * and was temporarily removed, and is now being re-added. | |
658 | * If so, we can simply re-add it. | |
659 | */ | |
660 | tst->ss->uuid_from_super(tst, duuid); | |
661 | ||
662 | /* re-add doesn't work for version-1 superblocks | |
663 | * before 2.6.18 :-( | |
664 | */ | |
665 | if (array.major_version == 1 && | |
666 | get_linux_version() <= 2006018) | |
667 | ; | |
668 | else if (st->sb) { | |
669 | struct mdinfo mdi; | |
670 | st->ss->getinfo_super(st, &mdi, NULL); | |
671 | st->ss->uuid_from_super(st, ouuid); | |
672 | if ((mdi.disk.state & (1<<MD_DISK_ACTIVE)) && | |
673 | !(mdi.disk.state & (1<<MD_DISK_FAULTY)) && | |
674 | memcmp(duuid, ouuid, sizeof(ouuid))==0) { | |
675 | /* look like it is worth a try. Need to | |
676 | * make sure kernel will accept it though. | |
677 | */ | |
678 | disc.number = mdi.disk.number; | |
679 | if (ioctl(fd, GET_DISK_INFO, &disc) != 0 | |
680 | || disc.major != 0 || disc.minor != 0 | |
681 | || !enough_fd(fd)) | |
682 | goto skip_re_add; | |
683 | disc.major = major(stb.st_rdev); | |
684 | disc.minor = minor(stb.st_rdev); | |
685 | disc.number = mdi.disk.number; | |
686 | disc.raid_disk = mdi.disk.raid_disk; | |
687 | disc.state = mdi.disk.state; | |
688 | if (dv->writemostly == 1) | |
689 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
690 | if (dv->writemostly == 2) | |
691 | disc.state &= ~(1 << MD_DISK_WRITEMOSTLY); | |
692 | remove_partitions(tfd); | |
693 | close(tfd); | |
694 | tfd = -1; | |
695 | if (update) { | |
696 | int rv = -1; | |
697 | tfd = dev_open(dv->devname, O_RDWR); | |
698 | ||
699 | if (tfd >= 0) | |
700 | rv = st->ss->update_super( | |
701 | st, NULL, update, | |
702 | devname, verbose, 0, NULL); | |
703 | if (rv == 0) | |
704 | rv = tst->ss->store_super(st, tfd); | |
705 | close(tfd); | |
706 | tfd = -1; | |
707 | if (rv != 0) { | |
708 | fprintf(stderr, Name ": failed to update" | |
709 | " superblock during re-add\n"); | |
710 | return 1; | |
711 | } | |
712 | } | |
713 | /* don't even try if disk is marked as faulty */ | |
714 | errno = 0; | |
715 | if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) { | |
716 | if (verbose >= 0) | |
717 | fprintf(stderr, Name ": re-added %s\n", add_dev); | |
718 | count++; | |
719 | continue; | |
720 | } | |
721 | if (errno == ENOMEM || errno == EROFS) { | |
722 | fprintf(stderr, Name ": add new device failed for %s: %s\n", | |
723 | add_dev, strerror(errno)); | |
724 | if (add_dev != dv->devname) | |
725 | continue; | |
726 | return 1; | |
727 | } | |
728 | skip_re_add: | |
729 | re_add_failed = 1; | |
730 | } | |
731 | st->ss->free_super(st); | |
732 | } | |
733 | if (add_dev != dv->devname) { | |
734 | if (verbose > 0) | |
735 | fprintf(stderr, Name | |
736 | ": --re-add for %s to %s is not possible\n", | |
737 | add_dev, devname); | |
738 | if (tfd >= 0) { | |
739 | close(tfd); | |
740 | tfd = -1; | |
741 | } | |
742 | continue; | |
743 | } | |
744 | if (dv->re_add) { | |
745 | if (tfd >= 0) | |
746 | close(tfd); | |
747 | fprintf(stderr, Name | |
748 | ": --re-add for %s to %s is not possible\n", | |
749 | dv->devname, devname); | |
750 | return 1; | |
751 | } | |
752 | if (re_add_failed) { | |
753 | fprintf(stderr, Name ": %s reports being an active member for %s, but a --re-add fails.\n", | |
754 | dv->devname, devname); | |
755 | fprintf(stderr, Name ": not performing --add as that would convert %s in to a spare.\n", | |
756 | dv->devname); | |
757 | fprintf(stderr, Name ": To make this a spare, use \"mdadm --zero-superblock %s\" first.\n", | |
758 | dv->devname); | |
759 | if (tfd >= 0) | |
760 | close(tfd); | |
761 | return 1; | |
762 | } | |
763 | } else { | |
764 | /* non-persistent. Must ensure that new drive | |
765 | * is at least array.size big. | |
766 | */ | |
767 | if (ldsize/512 < array_size) { | |
768 | fprintf(stderr, Name ": %s not large enough to join array\n", | |
769 | dv->devname); | |
770 | if (tfd >= 0) | |
771 | close(tfd); | |
772 | return 1; | |
773 | } | |
774 | } | |
775 | /* committed to really trying this device now*/ | |
776 | if (tfd >= 0) { | |
777 | remove_partitions(tfd); | |
778 | close(tfd); | |
779 | tfd = -1; | |
780 | } | |
781 | /* in 2.6.17 and earlier, version-1 superblocks won't | |
782 | * use the number we write, but will choose a free number. | |
783 | * we must choose the same free number, which requires | |
784 | * starting at 'raid_disks' and counting up | |
785 | */ | |
786 | for (j = array.raid_disks; j< tst->max_devs; j++) { | |
787 | disc.number = j; | |
788 | if (ioctl(fd, GET_DISK_INFO, &disc)) | |
789 | break; | |
790 | if (disc.major==0 && disc.minor==0) | |
791 | break; | |
792 | if (disc.state & 8) /* removed */ | |
793 | break; | |
794 | } | |
795 | disc.major = major(stb.st_rdev); | |
796 | disc.minor = minor(stb.st_rdev); | |
797 | disc.number =j; | |
798 | disc.state = 0; | |
799 | if (array.not_persistent==0) { | |
800 | int dfd; | |
801 | if (dv->writemostly == 1) | |
802 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
803 | dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT); | |
804 | if (tst->ss->external && | |
805 | mdmon_running(tst->container_dev)) | |
806 | tst->update_tail = &tst->updates; | |
807 | if (tst->ss->add_to_super(tst, &disc, dfd, | |
808 | dv->devname)) { | |
809 | close(dfd); | |
810 | return 1; | |
811 | } | |
812 | if (tst->ss->write_init_super(tst)) { | |
813 | close(dfd); | |
814 | return 1; | |
815 | } | |
816 | } else if (dv->re_add) { | |
817 | /* this had better be raid1. | |
818 | * As we are "--re-add"ing we must find a spare slot | |
819 | * to fill. | |
820 | */ | |
821 | char *used = malloc(array.raid_disks); | |
822 | memset(used, 0, array.raid_disks); | |
823 | for (j=0; j< tst->max_devs; j++) { | |
824 | mdu_disk_info_t disc2; | |
825 | disc2.number = j; | |
826 | if (ioctl(fd, GET_DISK_INFO, &disc2)) | |
827 | continue; | |
828 | if (disc2.major==0 && disc2.minor==0) | |
829 | continue; | |
830 | if (disc2.state & 8) /* removed */ | |
831 | continue; | |
832 | if (disc2.raid_disk < 0) | |
833 | continue; | |
834 | if (disc2.raid_disk > array.raid_disks) | |
835 | continue; | |
836 | used[disc2.raid_disk] = 1; | |
837 | } | |
838 | for (j=0 ; j<array.raid_disks; j++) | |
839 | if (!used[j]) { | |
840 | disc.raid_disk = j; | |
841 | disc.state |= (1<<MD_DISK_SYNC); | |
842 | break; | |
843 | } | |
844 | free(used); | |
845 | } | |
846 | if (dv->writemostly == 1) | |
847 | disc.state |= (1 << MD_DISK_WRITEMOSTLY); | |
848 | if (tst->ss->external) { | |
849 | /* add a disk | |
850 | * to an external metadata container */ | |
851 | struct mdinfo new_mdi; | |
852 | struct mdinfo *sra; | |
853 | int container_fd; | |
854 | int devnum = fd2devnum(fd); | |
855 | int dfd; | |
856 | ||
857 | container_fd = open_dev_excl(devnum); | |
858 | if (container_fd < 0) { | |
859 | fprintf(stderr, Name ": add failed for %s:" | |
860 | " could not get exclusive access to container\n", | |
861 | dv->devname); | |
862 | tst->ss->free_super(tst); | |
863 | return 1; | |
864 | } | |
865 | ||
866 | dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT); | |
867 | if (tst->ss->add_to_super(tst, &disc, dfd, | |
868 | dv->devname)) { | |
869 | close(dfd); | |
870 | close(container_fd); | |
871 | return 1; | |
872 | } | |
873 | close(dfd); | |
874 | ||
875 | sra = sysfs_read(container_fd, -1, 0); | |
876 | if (!sra) { | |
877 | fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n", | |
878 | dv->devname); | |
879 | close(container_fd); | |
880 | tst->ss->free_super(tst); | |
881 | return 1; | |
882 | } | |
883 | sra->array.level = LEVEL_CONTAINER; | |
884 | /* Need to set data_offset and component_size */ | |
885 | tst->ss->getinfo_super(tst, &new_mdi, NULL); | |
886 | new_mdi.disk.major = disc.major; | |
887 | new_mdi.disk.minor = disc.minor; | |
888 | new_mdi.recovery_start = 0; | |
889 | /* Make sure fds are closed as they are O_EXCL which | |
890 | * would block add_disk */ | |
891 | tst->ss->free_super(tst); | |
892 | if (sysfs_add_disk(sra, &new_mdi, 0) != 0) { | |
893 | fprintf(stderr, Name ": add new device to external metadata" | |
894 | " failed for %s\n", dv->devname); | |
895 | close(container_fd); | |
896 | sysfs_free(sra); | |
897 | return 1; | |
898 | } | |
899 | ping_monitor(devnum2devname(devnum)); | |
900 | sysfs_free(sra); | |
901 | close(container_fd); | |
902 | } else { | |
903 | tst->ss->free_super(tst); | |
904 | if (ioctl(fd, ADD_NEW_DISK, &disc)) { | |
905 | fprintf(stderr, Name ": add new device failed for %s as %d: %s\n", | |
906 | dv->devname, j, strerror(errno)); | |
907 | return 1; | |
908 | } | |
909 | } | |
910 | if (verbose >= 0) | |
911 | fprintf(stderr, Name ": added %s\n", dv->devname); | |
912 | break; | |
913 | ||
914 | case 'r': | |
915 | /* hot remove */ | |
916 | if (subarray) { | |
917 | fprintf(stderr, Name ": Cannot remove disks from a" | |
918 | " \'member\' array, perform this" | |
919 | " operation on the parent container\n"); | |
920 | if (sysfd >= 0) | |
921 | close(sysfd); | |
922 | return 1; | |
923 | } | |
924 | if (tst->ss->external) { | |
925 | /* To remove a device from a container, we must | |
926 | * check that it isn't in use in an array. | |
927 | * This involves looking in the 'holders' | |
928 | * directory - there must be just one entry, | |
929 | * the container. | |
930 | * To ensure that it doesn't get used as a | |
931 | * hold spare while we are checking, we | |
932 | * get an O_EXCL open on the container | |
933 | */ | |
934 | int dnum = fd2devnum(fd); | |
935 | lfd = open_dev_excl(dnum); | |
936 | if (lfd < 0) { | |
937 | fprintf(stderr, Name | |
938 | ": Cannot get exclusive access " | |
939 | " to container - odd\n"); | |
940 | if (sysfd >= 0) | |
941 | close(sysfd); | |
942 | return 1; | |
943 | } | |
944 | /* in the detached case it is not possible to | |
945 | * check if we are the unique holder, so just | |
946 | * rely on the 'detached' checks | |
947 | */ | |
948 | if (strcmp(dv->devname, "detached") == 0 || | |
949 | sysfd >= 0 || | |
950 | sysfs_unique_holder(dnum, stb.st_rdev)) | |
951 | /* pass */; | |
952 | else { | |
953 | fprintf(stderr, Name | |
954 | ": %s is %s, cannot remove.\n", | |
955 | dnprintable, | |
956 | errno == EEXIST ? "still in use": | |
957 | "not a member"); | |
958 | close(lfd); | |
959 | return 1; | |
960 | } | |
961 | } | |
962 | /* FIXME check that it is a current member */ | |
963 | if (sysfd >= 0) { | |
964 | /* device has been removed and we don't know | |
965 | * the major:minor number | |
966 | */ | |
967 | int n = write(sysfd, "remove", 6); | |
968 | if (n != 6) | |
969 | err = -1; | |
970 | else | |
971 | err = 0; | |
972 | close(sysfd); | |
973 | sysfd = -1; | |
974 | } else { | |
975 | err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev); | |
976 | if (err && errno == ENODEV) { | |
977 | /* Old kernels rejected this if no personality | |
978 | * registered */ | |
979 | struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS); | |
980 | struct mdinfo *dv = NULL; | |
981 | if (sra) | |
982 | dv = sra->devs; | |
983 | for ( ; dv ; dv=dv->next) | |
984 | if (dv->disk.major == (int)major(stb.st_rdev) && | |
985 | dv->disk.minor == (int)minor(stb.st_rdev)) | |
986 | break; | |
987 | if (dv) | |
988 | err = sysfs_set_str(sra, dv, | |
989 | "state", "remove"); | |
990 | else | |
991 | err = -1; | |
992 | if (sra) | |
993 | sysfs_free(sra); | |
994 | } | |
995 | } | |
996 | if (err) { | |
997 | fprintf(stderr, Name ": hot remove failed " | |
998 | "for %s: %s\n", dnprintable, | |
999 | strerror(errno)); | |
1000 | if (lfd >= 0) | |
1001 | close(lfd); | |
1002 | return 1; | |
1003 | } | |
1004 | if (tst->ss->external) { | |
1005 | /* | |
1006 | * Before dropping our exclusive open we make an | |
1007 | * attempt at preventing mdmon from seeing an | |
1008 | * 'add' event before reconciling this 'remove' | |
1009 | * event. | |
1010 | */ | |
1011 | char *name = devnum2devname(fd2devnum(fd)); | |
1012 | ||
1013 | if (!name) { | |
1014 | fprintf(stderr, Name ": unable to get container name\n"); | |
1015 | return 1; | |
1016 | } | |
1017 | ||
1018 | ping_manager(name); | |
1019 | free(name); | |
1020 | } | |
1021 | if (lfd >= 0) | |
1022 | close(lfd); | |
1023 | count++; | |
1024 | if (verbose >= 0) | |
1025 | fprintf(stderr, Name ": hot removed %s from %s\n", | |
1026 | dnprintable, devname); | |
1027 | break; | |
1028 | ||
1029 | case 'f': /* set faulty */ | |
1030 | /* FIXME check current member */ | |
1031 | if ((sysfd >= 0 && write(sysfd, "faulty", 6) != 6) || | |
1032 | (sysfd < 0 && ioctl(fd, SET_DISK_FAULTY, | |
1033 | (unsigned long) stb.st_rdev))) { | |
1034 | fprintf(stderr, Name ": set device faulty failed for %s: %s\n", | |
1035 | dnprintable, strerror(errno)); | |
1036 | if (sysfd >= 0) | |
1037 | close(sysfd); | |
1038 | return 1; | |
1039 | } | |
1040 | if (sysfd >= 0) | |
1041 | close(sysfd); | |
1042 | sysfd = -1; | |
1043 | count++; | |
1044 | if (verbose >= 0) | |
1045 | fprintf(stderr, Name ": set %s faulty in %s\n", | |
1046 | dnprintable, devname); | |
1047 | break; | |
1048 | } | |
1049 | } | |
1050 | if (test && count == 0) | |
1051 | return 2; | |
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | int autodetect(void) | |
1056 | { | |
1057 | /* Open any md device, and issue the RAID_AUTORUN ioctl */ | |
1058 | int rv = 1; | |
1059 | int fd = dev_open("9:0", O_RDONLY); | |
1060 | if (fd >= 0) { | |
1061 | if (ioctl(fd, RAID_AUTORUN, 0) == 0) | |
1062 | rv = 0; | |
1063 | close(fd); | |
1064 | } | |
1065 | return rv; | |
1066 | } | |
1067 | ||
1068 | int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident *ident, int quiet) | |
1069 | { | |
1070 | struct supertype supertype, *st = &supertype; | |
1071 | int fd, rv = 2; | |
1072 | ||
1073 | memset(st, 0, sizeof(*st)); | |
1074 | ||
1075 | fd = open_subarray(dev, subarray, st, quiet); | |
1076 | if (fd < 0) | |
1077 | return 2; | |
1078 | ||
1079 | if (!st->ss->update_subarray) { | |
1080 | if (!quiet) | |
1081 | fprintf(stderr, | |
1082 | Name ": Operation not supported for %s metadata\n", | |
1083 | st->ss->name); | |
1084 | goto free_super; | |
1085 | } | |
1086 | ||
1087 | if (mdmon_running(st->devnum)) | |
1088 | st->update_tail = &st->updates; | |
1089 | ||
1090 | rv = st->ss->update_subarray(st, subarray, update, ident); | |
1091 | ||
1092 | if (rv) { | |
1093 | if (!quiet) | |
1094 | fprintf(stderr, Name ": Failed to update %s of subarray-%s in %s\n", | |
1095 | update, subarray, dev); | |
1096 | } else if (st->update_tail) | |
1097 | flush_metadata_updates(st); | |
1098 | else | |
1099 | st->ss->sync_metadata(st); | |
1100 | ||
1101 | if (rv == 0 && strcmp(update, "name") == 0 && !quiet) | |
1102 | fprintf(stderr, | |
1103 | Name ": Updated subarray-%s name from %s, UUIDs may have changed\n", | |
1104 | subarray, dev); | |
1105 | ||
1106 | free_super: | |
1107 | st->ss->free_super(st); | |
1108 | close(fd); | |
1109 | ||
1110 | return rv; | |
1111 | } | |
1112 | ||
1113 | /* Move spare from one array to another | |
1114 | * If adding to destination array fails | |
1115 | * add back to original array | |
1116 | * Returns 1 on success, 0 on failure */ | |
1117 | int move_spare(char *from_devname, char *to_devname, dev_t devid) | |
1118 | { | |
1119 | struct mddev_dev devlist; | |
1120 | char devname[20]; | |
1121 | ||
1122 | /* try to remove and add */ | |
1123 | int fd1 = open(to_devname, O_RDONLY); | |
1124 | int fd2 = open(from_devname, O_RDONLY); | |
1125 | ||
1126 | if (fd1 < 0 || fd2 < 0) { | |
1127 | if (fd1>=0) close(fd1); | |
1128 | if (fd2>=0) close(fd2); | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | devlist.next = NULL; | |
1133 | devlist.used = 0; | |
1134 | devlist.re_add = 0; | |
1135 | devlist.writemostly = 0; | |
1136 | devlist.devname = devname; | |
1137 | sprintf(devname, "%d:%d", major(devid), minor(devid)); | |
1138 | ||
1139 | devlist.disposition = 'r'; | |
1140 | if (Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL) == 0) { | |
1141 | devlist.disposition = 'a'; | |
1142 | if (Manage_subdevs(to_devname, fd1, &devlist, -1, 0, NULL) == 0) { | |
1143 | /* make sure manager is aware of changes */ | |
1144 | ping_manager(to_devname); | |
1145 | ping_manager(from_devname); | |
1146 | close(fd1); | |
1147 | close(fd2); | |
1148 | return 1; | |
1149 | } | |
1150 | else Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL); | |
1151 | } | |
1152 | close(fd1); | |
1153 | close(fd2); | |
1154 | return 0; | |
1155 | } | |
1156 | #endif |