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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2013 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 | struct mdinfo *mdi; | |
44 | int rv = 0; | |
45 | ||
46 | /* If this is an externally-managed array, we need to modify the | |
47 | * metadata_version so that mdmon doesn't undo our change. | |
48 | */ | |
49 | mdi = sysfs_read(fd, NULL, GET_LEVEL|GET_VERSION); | |
50 | if (mdi && | |
51 | mdi->array.major_version == -1 && | |
52 | is_subarray(mdi->text_version)) { | |
53 | char vers[64]; | |
54 | strcpy(vers, "external:"); | |
55 | strcat(vers, mdi->text_version); | |
56 | if (readonly > 0) { | |
57 | int rv; | |
58 | /* We set readonly ourselves. */ | |
59 | vers[9] = '-'; | |
60 | sysfs_set_str(mdi, NULL, "metadata_version", vers); | |
61 | ||
62 | close(fd); | |
63 | rv = sysfs_set_str(mdi, NULL, "array_state", "readonly"); | |
64 | ||
65 | if (rv < 0) { | |
66 | pr_err("failed to set readonly for %s: %s\n", | |
67 | devname, strerror(errno)); | |
68 | ||
69 | vers[9] = mdi->text_version[0]; | |
70 | sysfs_set_str(mdi, NULL, "metadata_version", vers); | |
71 | rv = 1; | |
72 | goto out; | |
73 | } | |
74 | } else { | |
75 | char *cp; | |
76 | /* We cannot set read/write - must signal mdmon */ | |
77 | vers[9] = '/'; | |
78 | sysfs_set_str(mdi, NULL, "metadata_version", vers); | |
79 | ||
80 | cp = strchr(vers+10, '/'); | |
81 | if (cp) | |
82 | *cp = 0; | |
83 | ping_monitor(vers+10); | |
84 | if (mdi->array.level <= 0) | |
85 | sysfs_set_str(mdi, NULL, "array_state", "active"); | |
86 | } | |
87 | goto out; | |
88 | } | |
89 | ||
90 | if (!md_array_active(fd)) { | |
91 | pr_err("%s does not appear to be active.\n", devname); | |
92 | rv = 1; | |
93 | goto out; | |
94 | } | |
95 | ||
96 | if (readonly > 0) { | |
97 | if (ioctl(fd, STOP_ARRAY_RO, NULL)) { | |
98 | pr_err("failed to set readonly for %s: %s\n", | |
99 | devname, strerror(errno)); | |
100 | rv = 1; | |
101 | goto out; | |
102 | } | |
103 | } else if (readonly < 0) { | |
104 | if (ioctl(fd, RESTART_ARRAY_RW, NULL)) { | |
105 | pr_err("failed to set writable for %s: %s\n", | |
106 | devname, strerror(errno)); | |
107 | rv = 1; | |
108 | goto out; | |
109 | } | |
110 | } | |
111 | out: | |
112 | sysfs_free(mdi); | |
113 | return rv; | |
114 | } | |
115 | ||
116 | static void remove_devices(char *devnm, char *path) | |
117 | { | |
118 | /* | |
119 | * Remove names at 'path' - possibly with | |
120 | * partition suffixes - which link to the 'standard' | |
121 | * name for devnm. These were probably created | |
122 | * by mdadm when the array was assembled. | |
123 | */ | |
124 | char base[40]; | |
125 | char *path2; | |
126 | char link[1024]; | |
127 | int n; | |
128 | int part; | |
129 | char *be; | |
130 | char *pe; | |
131 | ||
132 | if (!path) | |
133 | return; | |
134 | ||
135 | sprintf(base, "/dev/%s", devnm); | |
136 | be = base + strlen(base); | |
137 | ||
138 | path2 = xmalloc(strlen(path)+20); | |
139 | strcpy(path2, path); | |
140 | pe = path2 + strlen(path2); | |
141 | ||
142 | for (part = 0; part < 16; part++) { | |
143 | if (part) { | |
144 | sprintf(be, "p%d", part); | |
145 | ||
146 | if (isdigit(pe[-1])) | |
147 | sprintf(pe, "p%d", part); | |
148 | else | |
149 | sprintf(pe, "%d", part); | |
150 | } | |
151 | n = readlink(path2, link, sizeof(link)); | |
152 | if (n > 0 && (int)strlen(base) == n && | |
153 | strncmp(link, base, n) == 0) | |
154 | unlink(path2); | |
155 | } | |
156 | free(path2); | |
157 | } | |
158 | ||
159 | int Manage_run(char *devname, int fd, struct context *c) | |
160 | { | |
161 | /* Run the array. Array must already be configured | |
162 | * Requires >= 0.90.0 | |
163 | */ | |
164 | char nm[32], *nmp; | |
165 | ||
166 | nmp = fd2devnm(fd); | |
167 | if (!nmp) { | |
168 | pr_err("Cannot find %s in sysfs!!\n", devname); | |
169 | return 1; | |
170 | } | |
171 | strcpy(nm, nmp); | |
172 | return IncrementalScan(c, nm); | |
173 | } | |
174 | ||
175 | int Manage_stop(char *devname, int fd, int verbose, int will_retry) | |
176 | { | |
177 | /* Stop the array. Array must already be configured | |
178 | * 'will_retry' means that error messages are not wanted. | |
179 | */ | |
180 | int rv = 0; | |
181 | struct map_ent *map = NULL; | |
182 | struct mdinfo *mdi; | |
183 | char devnm[32]; | |
184 | char container[32]; | |
185 | int err; | |
186 | int count; | |
187 | char buf[32]; | |
188 | unsigned long long rd1, rd2; | |
189 | ||
190 | if (will_retry && verbose == 0) | |
191 | verbose = -1; | |
192 | ||
193 | strcpy(devnm, fd2devnm(fd)); | |
194 | /* Get EXCL access first. If this fails, then attempting | |
195 | * to stop is probably a bad idea. | |
196 | */ | |
197 | mdi = sysfs_read(fd, NULL, GET_LEVEL|GET_COMPONENT|GET_VERSION); | |
198 | if (mdi && is_subarray(mdi->text_version)) { | |
199 | char *sl; | |
200 | strncpy(container, mdi->text_version+1, sizeof(container)); | |
201 | container[sizeof(container)-1] = 0; | |
202 | sl = strchr(container, '/'); | |
203 | if (sl) | |
204 | *sl = 0; | |
205 | } else | |
206 | container[0] = 0; | |
207 | close(fd); | |
208 | count = 5; | |
209 | while (((fd = ((devname[0] == '/') | |
210 | ?open(devname, O_RDONLY|O_EXCL) | |
211 | :open_dev_flags(devnm, O_RDONLY|O_EXCL))) < 0 | |
212 | || strcmp(fd2devnm(fd), devnm) != 0) | |
213 | && container[0] | |
214 | && mdmon_running(container) | |
215 | && count) { | |
216 | /* Can't open, so something might be wrong. However it | |
217 | * is a container, so we might be racing with mdmon, so | |
218 | * retry for a bit. | |
219 | */ | |
220 | if (fd >= 0) | |
221 | close(fd); | |
222 | flush_mdmon(container); | |
223 | count--; | |
224 | } | |
225 | if (fd < 0 || strcmp(fd2devnm(fd), devnm) != 0) { | |
226 | if (fd >= 0) | |
227 | close(fd); | |
228 | if (verbose >= 0) | |
229 | pr_err("Cannot get exclusive access to %s:Perhaps a running process, mounted filesystem or active volume group?\n", | |
230 | devname); | |
231 | return 1; | |
232 | } | |
233 | /* If this is an mdmon managed array, just write 'inactive' | |
234 | * to the array state and let mdmon clear up. | |
235 | */ | |
236 | if (mdi && | |
237 | mdi->array.level > 0 && | |
238 | is_subarray(mdi->text_version)) { | |
239 | int err; | |
240 | /* This is mdmon managed. */ | |
241 | close(fd); | |
242 | ||
243 | /* As we had an O_EXCL open, any use of the device | |
244 | * which blocks STOP_ARRAY is probably a transient use, | |
245 | * so it is reasonable to retry for a while - 5 seconds. | |
246 | */ | |
247 | count = 25; | |
248 | while (count && | |
249 | (err = sysfs_set_str(mdi, NULL, | |
250 | "array_state", | |
251 | "inactive")) < 0 | |
252 | && errno == EBUSY) { | |
253 | usleep(200000); | |
254 | count--; | |
255 | } | |
256 | if (err) { | |
257 | if (verbose >= 0) | |
258 | pr_err("failed to stop array %s: %s\n", | |
259 | devname, strerror(errno)); | |
260 | rv = 1; | |
261 | goto out; | |
262 | } | |
263 | ||
264 | /* Give monitor a chance to act */ | |
265 | ping_monitor(mdi->text_version); | |
266 | ||
267 | fd = open_dev_excl(devnm); | |
268 | if (fd < 0) { | |
269 | if (verbose >= 0) | |
270 | pr_err("failed to completely stop %s: Device is busy\n", | |
271 | devname); | |
272 | rv = 1; | |
273 | goto out; | |
274 | } | |
275 | } else if (mdi && | |
276 | mdi->array.major_version == -1 && | |
277 | mdi->array.minor_version == -2 && | |
278 | !is_subarray(mdi->text_version)) { | |
279 | struct mdstat_ent *mds, *m; | |
280 | /* container, possibly mdmon-managed. | |
281 | * Make sure mdmon isn't opening it, which | |
282 | * would interfere with the 'stop' | |
283 | */ | |
284 | ping_monitor(mdi->sys_name); | |
285 | ||
286 | /* now check that there are no existing arrays | |
287 | * which are members of this array | |
288 | */ | |
289 | mds = mdstat_read(0, 0); | |
290 | for (m = mds; m; m = m->next) | |
291 | if (m->metadata_version && | |
292 | strncmp(m->metadata_version, "external:", 9)==0 && | |
293 | metadata_container_matches(m->metadata_version+9, | |
294 | devnm)) { | |
295 | if (verbose >= 0) | |
296 | pr_err("Cannot stop container %s: member %s still active\n", | |
297 | devname, m->devnm); | |
298 | free_mdstat(mds); | |
299 | rv = 1; | |
300 | goto out; | |
301 | } | |
302 | } | |
303 | ||
304 | /* If the array is undergoing a reshape which changes the number | |
305 | * of devices, then it would be nice to stop it at a point where | |
306 | * it has completed a full number of stripes in both old and | |
307 | * new layouts as this will allow the reshape to be reverted. | |
308 | * So if 'sync_action' is "reshape" and 'raid_disks' shows two | |
309 | * different numbers, then | |
310 | * - freeze reshape | |
311 | * - set sync_max to next multiple of both data_disks and | |
312 | * chunk sizes (or next but one) | |
313 | * - unfreeze reshape | |
314 | * - wait on 'sync_completed' for that point to be reached. | |
315 | */ | |
316 | if (mdi && (mdi->array.level >= 4 && mdi->array.level <= 6) && | |
317 | sysfs_attribute_available(mdi, NULL, "sync_action") && | |
318 | sysfs_attribute_available(mdi, NULL, "reshape_direction") && | |
319 | sysfs_get_str(mdi, NULL, "sync_action", buf, 20) > 0 && | |
320 | strcmp(buf, "reshape\n") == 0 && | |
321 | sysfs_get_two(mdi, NULL, "raid_disks", &rd1, &rd2) == 2) { | |
322 | unsigned long long position, curr; | |
323 | unsigned long long chunk1, chunk2; | |
324 | unsigned long long rddiv, chunkdiv; | |
325 | unsigned long long sectors; | |
326 | unsigned long long sync_max, old_sync_max; | |
327 | unsigned long long completed; | |
328 | int backwards = 0; | |
329 | int delay; | |
330 | int scfd; | |
331 | ||
332 | delay = 40; | |
333 | while (rd1 > rd2 && delay > 0 && | |
334 | sysfs_get_ll(mdi, NULL, "sync_max", &old_sync_max) == 0) { | |
335 | /* must be in the critical section - wait a bit */ | |
336 | delay -= 1; | |
337 | usleep(100000); | |
338 | } | |
339 | ||
340 | if (sysfs_set_str(mdi, NULL, "sync_action", "frozen") != 0) | |
341 | goto done; | |
342 | /* Array is frozen */ | |
343 | ||
344 | rd1 -= mdi->array.level == 6 ? 2 : 1; | |
345 | rd2 -= mdi->array.level == 6 ? 2 : 1; | |
346 | sysfs_get_str(mdi, NULL, "reshape_direction", buf, sizeof(buf)); | |
347 | if (strncmp(buf, "back", 4) == 0) | |
348 | backwards = 1; | |
349 | if (sysfs_get_ll(mdi, NULL, "reshape_position", &position) != 0) { | |
350 | /* reshape must have finished now */ | |
351 | sysfs_set_str(mdi, NULL, "sync_action", "idle"); | |
352 | goto done; | |
353 | } | |
354 | sysfs_get_two(mdi, NULL, "chunk_size", &chunk1, &chunk2); | |
355 | chunk1 /= 512; | |
356 | chunk2 /= 512; | |
357 | rddiv = GCD(rd1, rd2); | |
358 | chunkdiv = GCD(chunk1, chunk2); | |
359 | sectors = (chunk1/chunkdiv) * chunk2 * (rd1/rddiv) * rd2; | |
360 | ||
361 | if (backwards) { | |
362 | /* Need to subtract 'reshape_position' from | |
363 | * array size to get equivalent of sync_max. | |
364 | * Size calculation based on raid5_size in kernel. | |
365 | */ | |
366 | unsigned long long size = mdi->component_size; | |
367 | size &= ~(chunk1-1); | |
368 | size &= ~(chunk2-1); | |
369 | /* rd1 must be smaller */ | |
370 | /* Reshape may have progressed further backwards than | |
371 | * recorded, so target even further back (hence "-1") | |
372 | */ | |
373 | position = (position / sectors - 1) * sectors; | |
374 | /* rd1 is always the conversion factor between 'sync' | |
375 | * position and 'reshape' position. | |
376 | * We read 1 "new" stripe worth of data from where-ever, | |
377 | * and when write out that full stripe. | |
378 | */ | |
379 | sync_max = size - position/rd1; | |
380 | } else { | |
381 | /* Reshape will very likely be beyond position, and it may | |
382 | * be too late to stop at '+1', so aim for '+2' | |
383 | */ | |
384 | position = (position / sectors + 2) * sectors; | |
385 | sync_max = position/rd1; | |
386 | } | |
387 | if (sysfs_get_ll(mdi, NULL, "sync_max", &old_sync_max) < 0) | |
388 | old_sync_max = mdi->component_size; | |
389 | /* Must not advance sync_max as that could confuse | |
390 | * the reshape monitor */ | |
391 | if (sync_max < old_sync_max) | |
392 | sysfs_set_num(mdi, NULL, "sync_max", sync_max); | |
393 | sysfs_set_str(mdi, NULL, "sync_action", "idle"); | |
394 | ||
395 | /* That should have set things going again. Now we | |
396 | * wait a little while (3 second max) for sync_completed | |
397 | * to reach the target. | |
398 | * The reshape process can block for 500msec if | |
399 | * the sync speed limit is hit, so we need to wait | |
400 | * a lot longer than that. 1 second is usually | |
401 | * enough. 3 is safe. | |
402 | */ | |
403 | delay = 3000; | |
404 | scfd = sysfs_open(mdi->sys_name, NULL, "sync_completed"); | |
405 | while (scfd >= 0 && delay > 0 && old_sync_max > 0) { | |
406 | unsigned long long max_completed; | |
407 | sysfs_get_ll(mdi, NULL, "reshape_position", &curr); | |
408 | sysfs_fd_get_str(scfd, buf, sizeof(buf)); | |
409 | if (strncmp(buf, "none", 4) == 0) { | |
410 | /* Either reshape has aborted, or hasn't | |
411 | * quite started yet. Wait a bit and | |
412 | * check 'sync_action' to see. | |
413 | */ | |
414 | usleep(10000); | |
415 | sysfs_get_str(mdi, NULL, "sync_action", buf, sizeof(buf)); | |
416 | if (strncmp(buf, "reshape", 7) != 0) | |
417 | break; | |
418 | } | |
419 | ||
420 | if (sysfs_fd_get_two(scfd, &completed, | |
421 | &max_completed) == 2 && | |
422 | /* 'completed' sometimes reads as max-uulong */ | |
423 | completed < max_completed && | |
424 | (completed > sync_max || | |
425 | (completed == sync_max && curr != position))) { | |
426 | while (completed > sync_max) { | |
427 | sync_max += sectors / rd1; | |
428 | if (backwards) | |
429 | position -= sectors; | |
430 | else | |
431 | position += sectors; | |
432 | } | |
433 | if (sync_max < old_sync_max) | |
434 | sysfs_set_num(mdi, NULL, "sync_max", sync_max); | |
435 | } | |
436 | ||
437 | if (!backwards && curr >= position) | |
438 | break; | |
439 | if (backwards && curr <= position) | |
440 | break; | |
441 | sysfs_wait(scfd, &delay); | |
442 | } | |
443 | if (scfd >= 0) | |
444 | close(scfd); | |
445 | ||
446 | } | |
447 | done: | |
448 | ||
449 | /* As we have an O_EXCL open, any use of the device | |
450 | * which blocks STOP_ARRAY is probably a transient use, | |
451 | * so it is reasonable to retry for a while - 5 seconds. | |
452 | */ | |
453 | count = 25; err = 0; | |
454 | while (count && fd >= 0 | |
455 | && (err = ioctl(fd, STOP_ARRAY, NULL)) < 0 | |
456 | && errno == EBUSY) { | |
457 | usleep(200000); | |
458 | count --; | |
459 | } | |
460 | if (fd >= 0 && err) { | |
461 | if (verbose >= 0) { | |
462 | pr_err("failed to stop array %s: %s\n", | |
463 | devname, strerror(errno)); | |
464 | if (errno == EBUSY) | |
465 | cont_err("Perhaps a running process, mounted filesystem or active volume group?\n"); | |
466 | } | |
467 | rv = 1; | |
468 | goto out; | |
469 | } | |
470 | ||
471 | if (get_linux_version() < 2006028) { | |
472 | /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array | |
473 | * was stopped, so We'll do it here just to be sure. Drop any | |
474 | * partitions as well... | |
475 | */ | |
476 | if (fd >= 0) | |
477 | ioctl(fd, BLKRRPART, 0); | |
478 | if (mdi) | |
479 | sysfs_uevent(mdi, "change"); | |
480 | } | |
481 | ||
482 | if (devnm[0] && use_udev()) { | |
483 | struct map_ent *mp = map_by_devnm(&map, devnm); | |
484 | remove_devices(devnm, mp ? mp->path : NULL); | |
485 | } | |
486 | ||
487 | if (verbose >= 0) | |
488 | pr_err("stopped %s\n", devname); | |
489 | map_lock(&map); | |
490 | map_remove(&map, devnm); | |
491 | map_unlock(&map); | |
492 | out: | |
493 | sysfs_free(mdi); | |
494 | ||
495 | return rv; | |
496 | } | |
497 | ||
498 | static struct mddev_dev *add_one(struct mddev_dev *dv, char *name, char disp) | |
499 | { | |
500 | struct mddev_dev *new; | |
501 | new = xmalloc(sizeof(*new)); | |
502 | memset(new, 0, sizeof(*new)); | |
503 | new->devname = xstrdup(name); | |
504 | new->disposition = disp; | |
505 | new->next = dv->next; | |
506 | dv->next = new; | |
507 | return new; | |
508 | } | |
509 | ||
510 | static void add_faulty(struct mddev_dev *dv, int fd, char disp) | |
511 | { | |
512 | mdu_array_info_t array; | |
513 | mdu_disk_info_t disk; | |
514 | int remaining_disks; | |
515 | int i; | |
516 | ||
517 | if (md_get_array_info(fd, &array) != 0) | |
518 | return; | |
519 | ||
520 | remaining_disks = array.nr_disks; | |
521 | for (i = 0; i < MAX_DISKS && remaining_disks > 0; i++) { | |
522 | char buf[40]; | |
523 | disk.number = i; | |
524 | if (md_get_disk_info(fd, &disk) != 0) | |
525 | continue; | |
526 | if (disk.major == 0 && disk.minor == 0) | |
527 | continue; | |
528 | remaining_disks--; | |
529 | if ((disk.state & 1) == 0) /* not faulty */ | |
530 | continue; | |
531 | sprintf(buf, "%d:%d", disk.major, disk.minor); | |
532 | dv = add_one(dv, buf, disp); | |
533 | } | |
534 | } | |
535 | ||
536 | static void add_detached(struct mddev_dev *dv, int fd, char disp) | |
537 | { | |
538 | mdu_array_info_t array; | |
539 | mdu_disk_info_t disk; | |
540 | int remaining_disks; | |
541 | int i; | |
542 | ||
543 | if (md_get_array_info(fd, &array) != 0) | |
544 | return; | |
545 | ||
546 | remaining_disks = array.nr_disks; | |
547 | for (i = 0; i < MAX_DISKS && remaining_disks > 0; i++) { | |
548 | char buf[40]; | |
549 | int sfd; | |
550 | disk.number = i; | |
551 | if (md_get_disk_info(fd, &disk) != 0) | |
552 | continue; | |
553 | if (disk.major == 0 && disk.minor == 0) | |
554 | continue; | |
555 | remaining_disks--; | |
556 | if (disp == 'f' && (disk.state & 1) != 0) /* already faulty */ | |
557 | continue; | |
558 | sprintf(buf, "%d:%d", disk.major, disk.minor); | |
559 | sfd = dev_open(buf, O_RDONLY); | |
560 | if (sfd >= 0) { | |
561 | /* Not detached */ | |
562 | close(sfd); | |
563 | continue; | |
564 | } | |
565 | if (errno != ENXIO) | |
566 | /* Probably not detached */ | |
567 | continue; | |
568 | dv = add_one(dv, buf, disp); | |
569 | } | |
570 | } | |
571 | ||
572 | static void add_set(struct mddev_dev *dv, int fd, char set_char) | |
573 | { | |
574 | mdu_array_info_t array; | |
575 | mdu_disk_info_t disk; | |
576 | int remaining_disks; | |
577 | int copies, set; | |
578 | int i; | |
579 | ||
580 | if (md_get_array_info(fd, &array) != 0) | |
581 | return; | |
582 | if (array.level != 10) | |
583 | return; | |
584 | copies = ((array.layout & 0xff) * | |
585 | ((array.layout >> 8) & 0xff)); | |
586 | if (array.raid_disks % copies) | |
587 | return; | |
588 | ||
589 | remaining_disks = array.nr_disks; | |
590 | for (i = 0; i < MAX_DISKS && remaining_disks > 0; i++) { | |
591 | char buf[40]; | |
592 | disk.number = i; | |
593 | if (md_get_disk_info(fd, &disk) != 0) | |
594 | continue; | |
595 | if (disk.major == 0 && disk.minor == 0) | |
596 | continue; | |
597 | remaining_disks--; | |
598 | set = disk.raid_disk % copies; | |
599 | if (set_char != set + 'A') | |
600 | continue; | |
601 | sprintf(buf, "%d:%d", disk.major, disk.minor); | |
602 | dv = add_one(dv, buf, dv->disposition); | |
603 | } | |
604 | } | |
605 | ||
606 | int attempt_re_add(int fd, int tfd, struct mddev_dev *dv, | |
607 | struct supertype *dev_st, struct supertype *tst, | |
608 | unsigned long rdev, | |
609 | char *update, char *devname, int verbose, | |
610 | mdu_array_info_t *array) | |
611 | { | |
612 | struct mdinfo mdi; | |
613 | int duuid[4]; | |
614 | int ouuid[4]; | |
615 | ||
616 | dev_st->ss->getinfo_super(dev_st, &mdi, NULL); | |
617 | dev_st->ss->uuid_from_super(dev_st, ouuid); | |
618 | if (tst->sb) | |
619 | tst->ss->uuid_from_super(tst, duuid); | |
620 | else | |
621 | /* Assume uuid matches: kernel will check */ | |
622 | memcpy(duuid, ouuid, sizeof(ouuid)); | |
623 | if ((mdi.disk.state & (1<<MD_DISK_ACTIVE)) && | |
624 | !(mdi.disk.state & (1<<MD_DISK_FAULTY)) && | |
625 | memcmp(duuid, ouuid, sizeof(ouuid))==0) { | |
626 | /* Looks like it is worth a | |
627 | * try. Need to make sure | |
628 | * kernel will accept it | |
629 | * though. | |
630 | */ | |
631 | mdu_disk_info_t disc; | |
632 | /* re-add doesn't work for version-1 superblocks | |
633 | * before 2.6.18 :-( | |
634 | */ | |
635 | if (array->major_version == 1 && | |
636 | get_linux_version() <= 2006018) | |
637 | goto skip_re_add; | |
638 | disc.number = mdi.disk.number; | |
639 | if (md_get_disk_info(fd, &disc) != 0 || | |
640 | disc.major != 0 || disc.minor != 0) | |
641 | goto skip_re_add; | |
642 | disc.major = major(rdev); | |
643 | disc.minor = minor(rdev); | |
644 | disc.number = mdi.disk.number; | |
645 | disc.raid_disk = mdi.disk.raid_disk; | |
646 | disc.state = mdi.disk.state; | |
647 | if (array->state & (1 << MD_SB_CLUSTERED)) { | |
648 | /* extra flags are needed when adding to a cluster as | |
649 | * there are two cases to distinguish | |
650 | */ | |
651 | if (dv->disposition == 'c') | |
652 | disc.state |= (1 << MD_DISK_CANDIDATE); | |
653 | else | |
654 | disc.state |= (1 << MD_DISK_CLUSTER_ADD); | |
655 | } | |
656 | if (dv->writemostly == FlagSet) | |
657 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
658 | if (dv->writemostly == FlagClear) | |
659 | disc.state &= ~(1 << MD_DISK_WRITEMOSTLY); | |
660 | if (dv->failfast == FlagSet) | |
661 | disc.state |= 1 << MD_DISK_FAILFAST; | |
662 | if (dv->failfast == FlagClear) | |
663 | disc.state &= ~(1 << MD_DISK_FAILFAST); | |
664 | remove_partitions(tfd); | |
665 | if (update || dv->writemostly != FlagDefault | |
666 | || dv->failfast != FlagDefault) { | |
667 | int rv = -1; | |
668 | tfd = dev_open(dv->devname, O_RDWR); | |
669 | if (tfd < 0) { | |
670 | pr_err("failed to open %s for superblock update during re-add\n", dv->devname); | |
671 | return -1; | |
672 | } | |
673 | ||
674 | if (dv->writemostly == FlagSet) | |
675 | rv = dev_st->ss->update_super( | |
676 | dev_st, NULL, "writemostly", | |
677 | devname, verbose, 0, NULL); | |
678 | if (dv->writemostly == FlagClear) | |
679 | rv = dev_st->ss->update_super( | |
680 | dev_st, NULL, "readwrite", | |
681 | devname, verbose, 0, NULL); | |
682 | if (dv->failfast == FlagSet) | |
683 | rv = dev_st->ss->update_super( | |
684 | dev_st, NULL, "failfast", | |
685 | devname, verbose, 0, NULL); | |
686 | if (dv->failfast == FlagClear) | |
687 | rv = dev_st->ss->update_super( | |
688 | dev_st, NULL, "nofailfast", | |
689 | devname, verbose, 0, NULL); | |
690 | if (update) | |
691 | rv = dev_st->ss->update_super( | |
692 | dev_st, NULL, update, | |
693 | devname, verbose, 0, NULL); | |
694 | if (rv == 0) | |
695 | rv = dev_st->ss->store_super(dev_st, tfd); | |
696 | close(tfd); | |
697 | if (rv != 0) { | |
698 | pr_err("failed to update superblock during re-add\n"); | |
699 | return -1; | |
700 | } | |
701 | } | |
702 | /* don't even try if disk is marked as faulty */ | |
703 | errno = 0; | |
704 | if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) { | |
705 | if (verbose >= 0) | |
706 | pr_err("re-added %s\n", dv->devname); | |
707 | return 1; | |
708 | } | |
709 | if (errno == ENOMEM || errno == EROFS) { | |
710 | pr_err("add new device failed for %s: %s\n", | |
711 | dv->devname, strerror(errno)); | |
712 | if (dv->disposition == 'M') | |
713 | return 0; | |
714 | return -1; | |
715 | } | |
716 | } | |
717 | skip_re_add: | |
718 | return 0; | |
719 | } | |
720 | ||
721 | int Manage_add(int fd, int tfd, struct mddev_dev *dv, | |
722 | struct supertype *tst, mdu_array_info_t *array, | |
723 | int force, int verbose, char *devname, | |
724 | char *update, unsigned long rdev, unsigned long long array_size, | |
725 | int raid_slot) | |
726 | { | |
727 | unsigned long long ldsize; | |
728 | struct supertype *dev_st; | |
729 | int j; | |
730 | mdu_disk_info_t disc; | |
731 | ||
732 | if (!get_dev_size(tfd, dv->devname, &ldsize)) { | |
733 | if (dv->disposition == 'M') | |
734 | return 0; | |
735 | else | |
736 | return -1; | |
737 | } | |
738 | ||
739 | if (tst->ss == &super0 && ldsize > 4ULL*1024*1024*1024*1024) { | |
740 | /* More than 4TB is wasted on v0.90 */ | |
741 | if (!force) { | |
742 | pr_err("%s is larger than %s can effectively use.\n" | |
743 | " Add --force is you really want to add this device.\n", | |
744 | dv->devname, devname); | |
745 | return -1; | |
746 | } | |
747 | pr_err("%s is larger than %s can effectively use.\n" | |
748 | " Adding anyway as --force was given.\n", | |
749 | dv->devname, devname); | |
750 | } | |
751 | if (!tst->ss->external && array->major_version == 0) { | |
752 | if (ioctl(fd, HOT_ADD_DISK, rdev)==0) { | |
753 | if (verbose >= 0) | |
754 | pr_err("hot added %s\n", | |
755 | dv->devname); | |
756 | return 1; | |
757 | } | |
758 | ||
759 | pr_err("hot add failed for %s: %s\n", | |
760 | dv->devname, strerror(errno)); | |
761 | return -1; | |
762 | } | |
763 | ||
764 | if (array->not_persistent == 0 || tst->ss->external) { | |
765 | ||
766 | /* need to find a sample superblock to copy, and | |
767 | * a spare slot to use. | |
768 | * For 'external' array (well, container based), | |
769 | * We can just load the metadata for the array-> | |
770 | */ | |
771 | int array_failed; | |
772 | if (tst->sb) | |
773 | /* already loaded */; | |
774 | else if (tst->ss->external) { | |
775 | tst->ss->load_container(tst, fd, NULL); | |
776 | } else for (j = 0; j < tst->max_devs; j++) { | |
777 | char *dev; | |
778 | int dfd; | |
779 | disc.number = j; | |
780 | if (md_get_disk_info(fd, &disc)) | |
781 | continue; | |
782 | if (disc.major==0 && disc.minor==0) | |
783 | continue; | |
784 | if ((disc.state & 4)==0) /* sync */ | |
785 | continue; | |
786 | /* Looks like a good device to try */ | |
787 | dev = map_dev(disc.major, disc.minor, 1); | |
788 | if (!dev) | |
789 | continue; | |
790 | dfd = dev_open(dev, O_RDONLY); | |
791 | if (dfd < 0) | |
792 | continue; | |
793 | if (tst->ss->load_super(tst, dfd, | |
794 | NULL)) { | |
795 | close(dfd); | |
796 | continue; | |
797 | } | |
798 | close(dfd); | |
799 | break; | |
800 | } | |
801 | /* FIXME this is a bad test to be using */ | |
802 | if (!tst->sb && (dv->disposition != 'a' | |
803 | && dv->disposition != 'S')) { | |
804 | /* we are re-adding a device to a | |
805 | * completely dead array - have to depend | |
806 | * on kernel to check | |
807 | */ | |
808 | } else if (!tst->sb) { | |
809 | pr_err("cannot load array metadata from %s\n", devname); | |
810 | return -1; | |
811 | } | |
812 | ||
813 | /* Make sure device is large enough */ | |
814 | if (dv->disposition != 'j' && /* skip size check for Journal */ | |
815 | tst->sb && | |
816 | tst->ss->avail_size(tst, ldsize/512, INVALID_SECTORS) < | |
817 | array_size) { | |
818 | if (dv->disposition == 'M') | |
819 | return 0; | |
820 | pr_err("%s not large enough to join array\n", | |
821 | dv->devname); | |
822 | return -1; | |
823 | } | |
824 | ||
825 | /* Possibly this device was recently part of | |
826 | * the array and was temporarily removed, and | |
827 | * is now being re-added. If so, we can | |
828 | * simply re-add it. | |
829 | */ | |
830 | ||
831 | if (array->not_persistent == 0) { | |
832 | dev_st = dup_super(tst); | |
833 | dev_st->ss->load_super(dev_st, tfd, NULL); | |
834 | if (dev_st->sb && dv->disposition != 'S') { | |
835 | int rv; | |
836 | ||
837 | rv = attempt_re_add(fd, tfd, dv, dev_st, tst, | |
838 | rdev, update, devname, | |
839 | verbose, array); | |
840 | dev_st->ss->free_super(dev_st); | |
841 | if (rv) | |
842 | return rv; | |
843 | } | |
844 | } | |
845 | if (dv->disposition == 'M') { | |
846 | if (verbose > 0) | |
847 | pr_err("--re-add for %s to %s is not possible\n", | |
848 | dv->devname, devname); | |
849 | return 0; | |
850 | } | |
851 | if (dv->disposition == 'A') { | |
852 | pr_err("--re-add for %s to %s is not possible\n", | |
853 | dv->devname, devname); | |
854 | return -1; | |
855 | } | |
856 | if (array->active_disks < array->raid_disks) { | |
857 | char *avail = xcalloc(array->raid_disks, 1); | |
858 | int d; | |
859 | int found = 0; | |
860 | ||
861 | for (d = 0; d < MAX_DISKS && found < array->nr_disks; d++) { | |
862 | disc.number = d; | |
863 | if (md_get_disk_info(fd, &disc)) | |
864 | continue; | |
865 | if (disc.major == 0 && disc.minor == 0) | |
866 | continue; | |
867 | if (!(disc.state & (1<<MD_DISK_SYNC))) | |
868 | continue; | |
869 | avail[disc.raid_disk] = 1; | |
870 | found++; | |
871 | } | |
872 | array_failed = !enough(array->level, array->raid_disks, | |
873 | array->layout, 1, avail); | |
874 | free(avail); | |
875 | } else | |
876 | array_failed = 0; | |
877 | if (array_failed) { | |
878 | pr_err("%s has failed so using --add cannot work and might destroy\n", | |
879 | devname); | |
880 | pr_err("data on %s. You should stop the array and re-assemble it.\n", | |
881 | dv->devname); | |
882 | return -1; | |
883 | } | |
884 | } else { | |
885 | /* non-persistent. Must ensure that new drive | |
886 | * is at least array->size big. | |
887 | */ | |
888 | if (ldsize/512 < array_size) { | |
889 | pr_err("%s not large enough to join array\n", | |
890 | dv->devname); | |
891 | return -1; | |
892 | } | |
893 | } | |
894 | /* committed to really trying this device now*/ | |
895 | remove_partitions(tfd); | |
896 | ||
897 | /* in 2.6.17 and earlier, version-1 superblocks won't | |
898 | * use the number we write, but will choose a free number. | |
899 | * we must choose the same free number, which requires | |
900 | * starting at 'raid_disks' and counting up | |
901 | */ | |
902 | for (j = array->raid_disks; j < tst->max_devs; j++) { | |
903 | disc.number = j; | |
904 | if (md_get_disk_info(fd, &disc)) | |
905 | break; | |
906 | if (disc.major==0 && disc.minor==0) | |
907 | break; | |
908 | if (disc.state & 8) /* removed */ | |
909 | break; | |
910 | } | |
911 | disc.major = major(rdev); | |
912 | disc.minor = minor(rdev); | |
913 | if (raid_slot < 0) | |
914 | disc.number = j; | |
915 | else | |
916 | disc.number = raid_slot; | |
917 | disc.state = 0; | |
918 | ||
919 | /* only add journal to array that supports journaling */ | |
920 | if (dv->disposition == 'j') { | |
921 | struct mdinfo mdi; | |
922 | struct mdinfo *mdp; | |
923 | ||
924 | mdp = sysfs_read(fd, NULL, GET_ARRAY_STATE); | |
925 | if (!mdp) { | |
926 | pr_err("%s unable to read array state.\n", devname); | |
927 | return -1; | |
928 | } | |
929 | ||
930 | if (mdp->array_state != ARRAY_READONLY) { | |
931 | sysfs_free(mdp); | |
932 | pr_err("%s is not readonly, cannot add journal.\n", devname); | |
933 | return -1; | |
934 | } | |
935 | ||
936 | sysfs_free(mdp); | |
937 | ||
938 | tst->ss->getinfo_super(tst, &mdi, NULL); | |
939 | if (mdi.journal_device_required == 0) { | |
940 | pr_err("%s does not support journal device.\n", devname); | |
941 | return -1; | |
942 | } | |
943 | disc.raid_disk = 0; | |
944 | } | |
945 | ||
946 | if (array->not_persistent==0) { | |
947 | int dfd; | |
948 | if (dv->disposition == 'j') | |
949 | disc.state |= (1 << MD_DISK_JOURNAL) | (1 << MD_DISK_SYNC); | |
950 | if (dv->writemostly == FlagSet) | |
951 | disc.state |= 1 << MD_DISK_WRITEMOSTLY; | |
952 | if (dv->failfast == FlagSet) | |
953 | disc.state |= 1 << MD_DISK_FAILFAST; | |
954 | dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT); | |
955 | if (tst->ss->add_to_super(tst, &disc, dfd, | |
956 | dv->devname, INVALID_SECTORS)) | |
957 | return -1; | |
958 | if (tst->ss->write_init_super(tst)) | |
959 | return -1; | |
960 | } else if (dv->disposition == 'A') { | |
961 | /* this had better be raid1. | |
962 | * As we are "--re-add"ing we must find a spare slot | |
963 | * to fill. | |
964 | */ | |
965 | char *used = xcalloc(array->raid_disks, 1); | |
966 | for (j = 0; j < tst->max_devs; j++) { | |
967 | mdu_disk_info_t disc2; | |
968 | disc2.number = j; | |
969 | if (md_get_disk_info(fd, &disc2)) | |
970 | continue; | |
971 | if (disc2.major==0 && disc2.minor==0) | |
972 | continue; | |
973 | if (disc2.state & 8) /* removed */ | |
974 | continue; | |
975 | if (disc2.raid_disk < 0) | |
976 | continue; | |
977 | if (disc2.raid_disk > array->raid_disks) | |
978 | continue; | |
979 | used[disc2.raid_disk] = 1; | |
980 | } | |
981 | for (j = 0 ; j < array->raid_disks; j++) | |
982 | if (!used[j]) { | |
983 | disc.raid_disk = j; | |
984 | disc.state |= (1<<MD_DISK_SYNC); | |
985 | break; | |
986 | } | |
987 | free(used); | |
988 | } | |
989 | ||
990 | if (array->state & (1 << MD_SB_CLUSTERED)) { | |
991 | if (dv->disposition == 'c') | |
992 | disc.state |= (1 << MD_DISK_CANDIDATE); | |
993 | else | |
994 | disc.state |= (1 << MD_DISK_CLUSTER_ADD); | |
995 | } | |
996 | ||
997 | if (dv->writemostly == FlagSet) | |
998 | disc.state |= (1 << MD_DISK_WRITEMOSTLY); | |
999 | if (dv->failfast == FlagSet) | |
1000 | disc.state |= (1 << MD_DISK_FAILFAST); | |
1001 | if (tst->ss->external) { | |
1002 | /* add a disk | |
1003 | * to an external metadata container */ | |
1004 | struct mdinfo new_mdi; | |
1005 | struct mdinfo *sra; | |
1006 | int container_fd; | |
1007 | char devnm[32]; | |
1008 | int dfd; | |
1009 | ||
1010 | strcpy(devnm, fd2devnm(fd)); | |
1011 | ||
1012 | container_fd = open_dev_excl(devnm); | |
1013 | if (container_fd < 0) { | |
1014 | pr_err("add failed for %s: could not get exclusive access to container\n", | |
1015 | dv->devname); | |
1016 | tst->ss->free_super(tst); | |
1017 | return -1; | |
1018 | } | |
1019 | ||
1020 | Kill(dv->devname, NULL, 0, -1, 0); | |
1021 | dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT); | |
1022 | if (mdmon_running(tst->container_devnm)) | |
1023 | tst->update_tail = &tst->updates; | |
1024 | if (tst->ss->add_to_super(tst, &disc, dfd, | |
1025 | dv->devname, INVALID_SECTORS)) { | |
1026 | close(dfd); | |
1027 | close(container_fd); | |
1028 | return -1; | |
1029 | } | |
1030 | if (tst->update_tail) | |
1031 | flush_metadata_updates(tst); | |
1032 | else | |
1033 | tst->ss->sync_metadata(tst); | |
1034 | ||
1035 | sra = sysfs_read(container_fd, NULL, 0); | |
1036 | if (!sra) { | |
1037 | pr_err("add failed for %s: sysfs_read failed\n", | |
1038 | dv->devname); | |
1039 | close(container_fd); | |
1040 | tst->ss->free_super(tst); | |
1041 | return -1; | |
1042 | } | |
1043 | sra->array.level = LEVEL_CONTAINER; | |
1044 | /* Need to set data_offset and component_size */ | |
1045 | tst->ss->getinfo_super(tst, &new_mdi, NULL); | |
1046 | new_mdi.disk.major = disc.major; | |
1047 | new_mdi.disk.minor = disc.minor; | |
1048 | new_mdi.recovery_start = 0; | |
1049 | /* Make sure fds are closed as they are O_EXCL which | |
1050 | * would block add_disk */ | |
1051 | tst->ss->free_super(tst); | |
1052 | if (sysfs_add_disk(sra, &new_mdi, 0) != 0) { | |
1053 | pr_err("add new device to external metadata failed for %s\n", dv->devname); | |
1054 | close(container_fd); | |
1055 | sysfs_free(sra); | |
1056 | return -1; | |
1057 | } | |
1058 | ping_monitor(devnm); | |
1059 | sysfs_free(sra); | |
1060 | close(container_fd); | |
1061 | } else { | |
1062 | tst->ss->free_super(tst); | |
1063 | if (ioctl(fd, ADD_NEW_DISK, &disc)) { | |
1064 | if (dv->disposition == 'j') | |
1065 | pr_err("Failed to hot add %s as journal, " | |
1066 | "please try restart %s.\n", dv->devname, devname); | |
1067 | else | |
1068 | pr_err("add new device failed for %s as %d: %s\n", | |
1069 | dv->devname, j, strerror(errno)); | |
1070 | return -1; | |
1071 | } | |
1072 | if (dv->disposition == 'j') { | |
1073 | pr_err("Journal added successfully, making %s read-write\n", devname); | |
1074 | if (Manage_ro(devname, fd, -1)) | |
1075 | pr_err("Failed to make %s read-write\n", devname); | |
1076 | } | |
1077 | ||
1078 | } | |
1079 | if (verbose >= 0) | |
1080 | pr_err("added %s\n", dv->devname); | |
1081 | return 1; | |
1082 | } | |
1083 | ||
1084 | int Manage_remove(struct supertype *tst, int fd, struct mddev_dev *dv, | |
1085 | int sysfd, unsigned long rdev, int force, int verbose, char *devname) | |
1086 | { | |
1087 | int lfd = -1; | |
1088 | int err; | |
1089 | ||
1090 | if (tst->ss->external) { | |
1091 | /* To remove a device from a container, we must | |
1092 | * check that it isn't in use in an array. | |
1093 | * This involves looking in the 'holders' | |
1094 | * directory - there must be just one entry, | |
1095 | * the container. | |
1096 | * To ensure that it doesn't get used as a | |
1097 | * hot spare while we are checking, we | |
1098 | * get an O_EXCL open on the container | |
1099 | */ | |
1100 | int ret; | |
1101 | char devnm[32]; | |
1102 | strcpy(devnm, fd2devnm(fd)); | |
1103 | lfd = open_dev_excl(devnm); | |
1104 | if (lfd < 0) { | |
1105 | pr_err("Cannot get exclusive access to container - odd\n"); | |
1106 | return -1; | |
1107 | } | |
1108 | /* We may not be able to check on holders in | |
1109 | * sysfs, either because we don't have the dev num | |
1110 | * (rdev == 0) or because the device has been detached | |
1111 | * and the 'holders' directory no longer exists | |
1112 | * (ret == -1). In that case, assume it is OK to | |
1113 | * remove. | |
1114 | */ | |
1115 | if (rdev == 0) | |
1116 | ret = -1; | |
1117 | else { | |
1118 | /* | |
1119 | * The drive has already been set to 'faulty', however | |
1120 | * monitor might not have had time to process it and the | |
1121 | * drive might still have an entry in the 'holders' | |
1122 | * directory. Try a few times to avoid a false error | |
1123 | */ | |
1124 | int count = 20; | |
1125 | ||
1126 | do { | |
1127 | ret = sysfs_unique_holder(devnm, rdev); | |
1128 | if (ret < 2) | |
1129 | break; | |
1130 | usleep(100 * 1000); /* 100ms */ | |
1131 | } while (--count > 0); | |
1132 | ||
1133 | if (ret == 0) { | |
1134 | pr_err("%s is not a member, cannot remove.\n", | |
1135 | dv->devname); | |
1136 | close(lfd); | |
1137 | return -1; | |
1138 | } | |
1139 | if (ret >= 2) { | |
1140 | pr_err("%s is still in use, cannot remove.\n", | |
1141 | dv->devname); | |
1142 | close(lfd); | |
1143 | return -1; | |
1144 | } | |
1145 | } | |
1146 | } | |
1147 | /* FIXME check that it is a current member */ | |
1148 | if (sysfd >= 0) { | |
1149 | /* device has been removed and we don't know | |
1150 | * the major:minor number | |
1151 | */ | |
1152 | err = sys_hot_remove_disk(sysfd, force); | |
1153 | } else { | |
1154 | err = hot_remove_disk(fd, rdev, force); | |
1155 | if (err && errno == ENODEV) { | |
1156 | /* Old kernels rejected this if no personality | |
1157 | * is registered */ | |
1158 | struct mdinfo *sra = sysfs_read(fd, NULL, GET_DEVS); | |
1159 | struct mdinfo *dv = NULL; | |
1160 | if (sra) | |
1161 | dv = sra->devs; | |
1162 | for ( ; dv ; dv=dv->next) | |
1163 | if (dv->disk.major == (int)major(rdev) && | |
1164 | dv->disk.minor == (int)minor(rdev)) | |
1165 | break; | |
1166 | if (dv) | |
1167 | err = sysfs_set_str(sra, dv, | |
1168 | "state", "remove"); | |
1169 | else | |
1170 | err = -1; | |
1171 | sysfs_free(sra); | |
1172 | } | |
1173 | } | |
1174 | if (err) { | |
1175 | pr_err("hot remove failed for %s: %s\n", dv->devname, | |
1176 | strerror(errno)); | |
1177 | if (lfd >= 0) | |
1178 | close(lfd); | |
1179 | return -1; | |
1180 | } | |
1181 | if (tst->ss->external) { | |
1182 | /* | |
1183 | * Before dropping our exclusive open we make an | |
1184 | * attempt at preventing mdmon from seeing an | |
1185 | * 'add' event before reconciling this 'remove' | |
1186 | * event. | |
1187 | */ | |
1188 | char *devnm = fd2devnm(fd); | |
1189 | ||
1190 | if (!devnm) { | |
1191 | pr_err("unable to get container name\n"); | |
1192 | return -1; | |
1193 | } | |
1194 | ||
1195 | ping_manager(devnm); | |
1196 | } | |
1197 | if (lfd >= 0) | |
1198 | close(lfd); | |
1199 | if (verbose >= 0) | |
1200 | pr_err("hot removed %s from %s\n", | |
1201 | dv->devname, devname); | |
1202 | return 1; | |
1203 | } | |
1204 | ||
1205 | int Manage_replace(struct supertype *tst, int fd, struct mddev_dev *dv, | |
1206 | unsigned long rdev, int verbose, char *devname) | |
1207 | { | |
1208 | struct mdinfo *mdi, *di; | |
1209 | if (tst->ss->external) { | |
1210 | pr_err("--replace only supported for native metadata (0.90 or 1.x)\n"); | |
1211 | return -1; | |
1212 | } | |
1213 | /* Need to find the device in sysfs and add 'want_replacement' to the | |
1214 | * status. | |
1215 | */ | |
1216 | mdi = sysfs_read(fd, NULL, GET_DEVS); | |
1217 | if (!mdi || !mdi->devs) { | |
1218 | pr_err("Cannot find status of %s to enable replacement - strange\n", | |
1219 | devname); | |
1220 | return -1; | |
1221 | } | |
1222 | for (di = mdi->devs; di; di = di->next) | |
1223 | if (di->disk.major == (int)major(rdev) && | |
1224 | di->disk.minor == (int)minor(rdev)) | |
1225 | break; | |
1226 | if (di) { | |
1227 | int rv; | |
1228 | if (di->disk.raid_disk < 0) { | |
1229 | pr_err("%s is not active and so cannot be replaced.\n", | |
1230 | dv->devname); | |
1231 | sysfs_free(mdi); | |
1232 | return -1; | |
1233 | } | |
1234 | rv = sysfs_set_str(mdi, di, | |
1235 | "state", "want_replacement"); | |
1236 | if (rv) { | |
1237 | sysfs_free(mdi); | |
1238 | pr_err("Failed to request replacement for %s\n", | |
1239 | dv->devname); | |
1240 | return -1; | |
1241 | } | |
1242 | if (verbose >= 0) | |
1243 | pr_err("Marked %s (device %d in %s) for replacement\n", | |
1244 | dv->devname, di->disk.raid_disk, devname); | |
1245 | /* If there is a matching 'with', we need to tell it which | |
1246 | * raid disk | |
1247 | */ | |
1248 | while (dv && dv->disposition != 'W') | |
1249 | dv = dv->next; | |
1250 | if (dv) { | |
1251 | dv->disposition = 'w'; | |
1252 | dv->used = di->disk.raid_disk; | |
1253 | } | |
1254 | return 1; | |
1255 | } | |
1256 | sysfs_free(mdi); | |
1257 | pr_err("%s not found in %s so cannot --replace it\n", | |
1258 | dv->devname, devname); | |
1259 | return -1; | |
1260 | } | |
1261 | ||
1262 | int Manage_with(struct supertype *tst, int fd, struct mddev_dev *dv, | |
1263 | unsigned long rdev, int verbose, char *devname) | |
1264 | { | |
1265 | struct mdinfo *mdi, *di; | |
1266 | /* try to set 'slot' for 'rdev' in 'fd' to 'dv->used' */ | |
1267 | mdi = sysfs_read(fd, NULL, GET_DEVS|GET_STATE); | |
1268 | if (!mdi || !mdi->devs) { | |
1269 | pr_err("Cannot find status of %s to enable replacement - strange\n", | |
1270 | devname); | |
1271 | return -1; | |
1272 | } | |
1273 | for (di = mdi->devs; di; di = di->next) | |
1274 | if (di->disk.major == (int)major(rdev) && | |
1275 | di->disk.minor == (int)minor(rdev)) | |
1276 | break; | |
1277 | if (di) { | |
1278 | int rv; | |
1279 | if (di->disk.state & (1<<MD_DISK_FAULTY)) { | |
1280 | pr_err("%s is faulty and cannot be a replacement\n", | |
1281 | dv->devname); | |
1282 | sysfs_free(mdi); | |
1283 | return -1; | |
1284 | } | |
1285 | if (di->disk.raid_disk >= 0) { | |
1286 | pr_err("%s is active and cannot be a replacement\n", | |
1287 | dv->devname); | |
1288 | sysfs_free(mdi); | |
1289 | return -1; | |
1290 | } | |
1291 | rv = sysfs_set_num(mdi, di, | |
1292 | "slot", dv->used); | |
1293 | if (rv) { | |
1294 | sysfs_free(mdi); | |
1295 | pr_err("Failed to set %s as preferred replacement.\n", | |
1296 | dv->devname); | |
1297 | return -1; | |
1298 | } | |
1299 | if (verbose >= 0) | |
1300 | pr_err("Marked %s in %s as replacement for device %d\n", | |
1301 | dv->devname, devname, dv->used); | |
1302 | return 1; | |
1303 | } | |
1304 | sysfs_free(mdi); | |
1305 | pr_err("%s not found in %s so cannot make it preferred replacement\n", | |
1306 | dv->devname, devname); | |
1307 | return -1; | |
1308 | } | |
1309 | ||
1310 | int Manage_subdevs(char *devname, int fd, | |
1311 | struct mddev_dev *devlist, int verbose, int test, | |
1312 | char *update, int force) | |
1313 | { | |
1314 | /* Do something to each dev. | |
1315 | * devmode can be | |
1316 | * 'a' - add the device | |
1317 | * try HOT_ADD_DISK | |
1318 | * If that fails EINVAL, try ADD_NEW_DISK | |
1319 | * 'S' - add the device as a spare - don't try re-add | |
1320 | * 'j' - add the device as a journal device | |
1321 | * 'A' - re-add the device | |
1322 | * 'r' - remove the device: HOT_REMOVE_DISK | |
1323 | * device can be 'faulty' or 'detached' in which case all | |
1324 | * matching devices are removed. | |
1325 | * 'f' - set the device faulty SET_DISK_FAULTY | |
1326 | * device can be 'detached' in which case any device that | |
1327 | * is inaccessible will be marked faulty. | |
1328 | * 'R' - mark this device as wanting replacement. | |
1329 | * 'W' - this device is added if necessary and activated as | |
1330 | * a replacement for a previous 'R' device. | |
1331 | * ----- | |
1332 | * 'w' - 'W' will be changed to 'w' when it is paired with | |
1333 | * a 'R' device. If a 'W' is found while walking the list | |
1334 | * it must be unpaired, and is an error. | |
1335 | * 'M' - this is created by a 'missing' target. It is a slight | |
1336 | * variant on 'A' | |
1337 | * 'F' - Another variant of 'A', where the device was faulty | |
1338 | * so must be removed from the array first. | |
1339 | * 'c' - confirm the device as found (for clustered environments) | |
1340 | * | |
1341 | * For 'f' and 'r', the device can also be a kernel-internal | |
1342 | * name such as 'sdb'. | |
1343 | */ | |
1344 | mdu_array_info_t array; | |
1345 | unsigned long long array_size; | |
1346 | struct mddev_dev *dv; | |
1347 | int tfd = -1; | |
1348 | struct supertype *tst; | |
1349 | char *subarray = NULL; | |
1350 | int sysfd = -1; | |
1351 | int count = 0; /* number of actions taken */ | |
1352 | struct mdinfo info; | |
1353 | struct mdinfo devinfo; | |
1354 | int frozen = 0; | |
1355 | int busy = 0; | |
1356 | int raid_slot = -1; | |
1357 | ||
1358 | if (sysfs_init(&info, fd, NULL)) { | |
1359 | pr_err("sysfs not availabile for %s\n", devname); | |
1360 | goto abort; | |
1361 | } | |
1362 | ||
1363 | if (md_get_array_info(fd, &array)) { | |
1364 | pr_err("Cannot get array info for %s\n", devname); | |
1365 | goto abort; | |
1366 | } | |
1367 | /* array.size is only 32 bits and may be truncated. | |
1368 | * So read from sysfs if possible, and record number of sectors | |
1369 | */ | |
1370 | ||
1371 | array_size = get_component_size(fd); | |
1372 | if (array_size <= 0) | |
1373 | array_size = array.size * 2; | |
1374 | ||
1375 | tst = super_by_fd(fd, &subarray); | |
1376 | if (!tst) { | |
1377 | pr_err("unsupport array - version %d.%d\n", | |
1378 | array.major_version, array.minor_version); | |
1379 | goto abort; | |
1380 | } | |
1381 | ||
1382 | for (dv = devlist; dv; dv = dv->next) { | |
1383 | unsigned long rdev = 0; /* device to add/remove etc */ | |
1384 | int rv; | |
1385 | int mj,mn; | |
1386 | ||
1387 | raid_slot = -1; | |
1388 | if (dv->disposition == 'c') { | |
1389 | rv = parse_cluster_confirm_arg(dv->devname, | |
1390 | &dv->devname, | |
1391 | &raid_slot); | |
1392 | if (rv) { | |
1393 | pr_err("Could not get the devname of cluster\n"); | |
1394 | goto abort; | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | if (strcmp(dv->devname, "failed") == 0 || | |
1399 | strcmp(dv->devname, "faulty") == 0) { | |
1400 | if (dv->disposition != 'A' | |
1401 | && dv->disposition != 'r') { | |
1402 | pr_err("%s only meaningful with -r or --re-add, not -%c\n", | |
1403 | dv->devname, dv->disposition); | |
1404 | goto abort; | |
1405 | } | |
1406 | add_faulty(dv, fd, (dv->disposition == 'A' | |
1407 | ? 'F' : 'r')); | |
1408 | continue; | |
1409 | } | |
1410 | if (strcmp(dv->devname, "detached") == 0) { | |
1411 | if (dv->disposition != 'r' && dv->disposition != 'f') { | |
1412 | pr_err("%s only meaningful with -r of -f, not -%c\n", | |
1413 | dv->devname, dv->disposition); | |
1414 | goto abort; | |
1415 | } | |
1416 | add_detached(dv, fd, dv->disposition); | |
1417 | continue; | |
1418 | } | |
1419 | ||
1420 | if (strcmp(dv->devname, "missing") == 0) { | |
1421 | struct mddev_dev *add_devlist; | |
1422 | struct mddev_dev **dp; | |
1423 | if (dv->disposition == 'c') { | |
1424 | rv = ioctl(fd, CLUSTERED_DISK_NACK, NULL); | |
1425 | break; | |
1426 | } | |
1427 | ||
1428 | if (dv->disposition != 'A') { | |
1429 | pr_err("'missing' only meaningful with --re-add\n"); | |
1430 | goto abort; | |
1431 | } | |
1432 | add_devlist = conf_get_devs(); | |
1433 | if (add_devlist == NULL) { | |
1434 | pr_err("no devices to scan for missing members."); | |
1435 | continue; | |
1436 | } | |
1437 | for (dp = &add_devlist; *dp; dp = & (*dp)->next) | |
1438 | /* 'M' (for 'missing') is like 'A' without errors */ | |
1439 | (*dp)->disposition = 'M'; | |
1440 | *dp = dv->next; | |
1441 | dv->next = add_devlist; | |
1442 | continue; | |
1443 | } | |
1444 | ||
1445 | if (strncmp(dv->devname, "set-", 4) == 0 && | |
1446 | strlen(dv->devname) == 5) { | |
1447 | int copies; | |
1448 | ||
1449 | if (dv->disposition != 'r' && | |
1450 | dv->disposition != 'f') { | |
1451 | pr_err("'%s' only meaningful with -r or -f\n", | |
1452 | dv->devname); | |
1453 | goto abort; | |
1454 | } | |
1455 | if (array.level != 10) { | |
1456 | pr_err("'%s' only meaningful with RAID10 arrays\n", | |
1457 | dv->devname); | |
1458 | goto abort; | |
1459 | } | |
1460 | copies = ((array.layout & 0xff) * | |
1461 | ((array.layout >> 8) & 0xff)); | |
1462 | if (array.raid_disks % copies != 0 || | |
1463 | dv->devname[4] < 'A' || | |
1464 | dv->devname[4] >= 'A' + copies || | |
1465 | copies > 26) { | |
1466 | pr_err("'%s' not meaningful with this array\n", | |
1467 | dv->devname); | |
1468 | goto abort; | |
1469 | } | |
1470 | add_set(dv, fd, dv->devname[4]); | |
1471 | continue; | |
1472 | } | |
1473 | ||
1474 | if (strchr(dv->devname, '/') == NULL && | |
1475 | strchr(dv->devname, ':') == NULL && | |
1476 | strlen(dv->devname) < 50) { | |
1477 | /* Assume this is a kernel-internal name like 'sda1' */ | |
1478 | int found = 0; | |
1479 | char dname[55]; | |
1480 | if (dv->disposition != 'r' && dv->disposition != 'f') { | |
1481 | pr_err("%s only meaningful with -r or -f, not -%c\n", | |
1482 | dv->devname, dv->disposition); | |
1483 | goto abort; | |
1484 | } | |
1485 | ||
1486 | sprintf(dname, "dev-%s", dv->devname); | |
1487 | sysfd = sysfs_open(fd2devnm(fd), dname, "block/dev"); | |
1488 | if (sysfd >= 0) { | |
1489 | char dn[20]; | |
1490 | if (sysfs_fd_get_str(sysfd, dn, 20) > 0 && | |
1491 | sscanf(dn, "%d:%d", &mj,&mn) == 2) { | |
1492 | rdev = makedev(mj,mn); | |
1493 | found = 1; | |
1494 | } | |
1495 | close(sysfd); | |
1496 | sysfd = -1; | |
1497 | } | |
1498 | if (!found) { | |
1499 | sysfd = sysfs_open(fd2devnm(fd), dname, "state"); | |
1500 | if (sysfd < 0) { | |
1501 | pr_err("%s does not appear to be a component of %s\n", | |
1502 | dv->devname, devname); | |
1503 | goto abort; | |
1504 | } | |
1505 | } | |
1506 | } else if ((dv->disposition == 'r' || dv->disposition == 'f') | |
1507 | && get_maj_min(dv->devname, &mj, &mn)) { | |
1508 | /* for 'fail' and 'remove', the device might | |
1509 | * not exist. | |
1510 | */ | |
1511 | rdev = makedev(mj, mn); | |
1512 | } else { | |
1513 | tfd = dev_open(dv->devname, O_RDONLY); | |
1514 | if (tfd >= 0) { | |
1515 | fstat_is_blkdev(tfd, dv->devname, &rdev); | |
1516 | close(tfd); | |
1517 | } else { | |
1518 | int open_err = errno; | |
1519 | if (!stat_is_blkdev(dv->devname, &rdev)) { | |
1520 | if (dv->disposition == 'M') | |
1521 | /* non-fatal. Also improbable */ | |
1522 | continue; | |
1523 | goto abort; | |
1524 | } | |
1525 | if (dv->disposition == 'r') | |
1526 | /* Be happy, the stat worked, that is | |
1527 | * enough for --remove | |
1528 | */ | |
1529 | ; | |
1530 | else { | |
1531 | if (dv->disposition == 'M') | |
1532 | /* non-fatal */ | |
1533 | continue; | |
1534 | pr_err("Cannot open %s: %s\n", | |
1535 | dv->devname, strerror(open_err)); | |
1536 | goto abort; | |
1537 | } | |
1538 | } | |
1539 | } | |
1540 | switch(dv->disposition){ | |
1541 | default: | |
1542 | pr_err("internal error - devmode[%s]=%d\n", | |
1543 | dv->devname, dv->disposition); | |
1544 | goto abort; | |
1545 | case 'a': | |
1546 | case 'S': /* --add-spare */ | |
1547 | case 'j': /* --add-journal */ | |
1548 | case 'A': | |
1549 | case 'M': /* --re-add missing */ | |
1550 | case 'F': /* --re-add faulty */ | |
1551 | case 'c': /* --cluster-confirm */ | |
1552 | /* add the device */ | |
1553 | if (subarray) { | |
1554 | pr_err("Cannot add disks to a \'member\' array, perform this operation on the parent container\n"); | |
1555 | goto abort; | |
1556 | } | |
1557 | ||
1558 | /* Let's first try to write re-add to sysfs */ | |
1559 | if (rdev != 0 && | |
1560 | (dv->disposition == 'A' || dv->disposition == 'F')) { | |
1561 | sysfs_init_dev(&devinfo, rdev); | |
1562 | if (sysfs_set_str(&info, &devinfo, "state", "re-add") == 0) { | |
1563 | pr_err("re-add %s to %s succeed\n", | |
1564 | dv->devname, info.sys_name); | |
1565 | break; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | if (dv->disposition == 'F') | |
1570 | /* Need to remove first */ | |
1571 | hot_remove_disk(fd, rdev, force); | |
1572 | /* Make sure it isn't in use (in 2.6 or later) */ | |
1573 | tfd = dev_open(dv->devname, O_RDONLY|O_EXCL); | |
1574 | if (tfd >= 0) { | |
1575 | /* We know no-one else is using it. We'll | |
1576 | * need non-exclusive access to add it, so | |
1577 | * do that now. | |
1578 | */ | |
1579 | close(tfd); | |
1580 | tfd = dev_open(dv->devname, O_RDONLY); | |
1581 | } | |
1582 | if (tfd < 0) { | |
1583 | if (dv->disposition == 'M') | |
1584 | continue; | |
1585 | pr_err("Cannot open %s: %s\n", | |
1586 | dv->devname, strerror(errno)); | |
1587 | goto abort; | |
1588 | } | |
1589 | if (!frozen) { | |
1590 | if (sysfs_freeze_array(&info) == 1) | |
1591 | frozen = 1; | |
1592 | else | |
1593 | frozen = -1; | |
1594 | } | |
1595 | rv = Manage_add(fd, tfd, dv, tst, &array, | |
1596 | force, verbose, devname, update, | |
1597 | rdev, array_size, raid_slot); | |
1598 | close(tfd); | |
1599 | tfd = -1; | |
1600 | if (rv < 0) | |
1601 | goto abort; | |
1602 | if (rv > 0) | |
1603 | count++; | |
1604 | break; | |
1605 | ||
1606 | case 'r': | |
1607 | /* hot remove */ | |
1608 | if (subarray) { | |
1609 | pr_err("Cannot remove disks from a \'member\' array, perform this operation on the parent container\n"); | |
1610 | rv = -1; | |
1611 | } else | |
1612 | rv = Manage_remove(tst, fd, dv, sysfd, | |
1613 | rdev, verbose, force, | |
1614 | devname); | |
1615 | if (sysfd >= 0) | |
1616 | close(sysfd); | |
1617 | sysfd = -1; | |
1618 | if (rv < 0) | |
1619 | goto abort; | |
1620 | if (rv > 0) | |
1621 | count++; | |
1622 | break; | |
1623 | ||
1624 | case 'f': /* set faulty */ | |
1625 | /* FIXME check current member */ | |
1626 | if ((sysfd >= 0 && write(sysfd, "faulty", 6) != 6) || | |
1627 | (sysfd < 0 && ioctl(fd, SET_DISK_FAULTY, | |
1628 | rdev))) { | |
1629 | if (errno == EBUSY) | |
1630 | busy = 1; | |
1631 | pr_err("set device faulty failed for %s: %s\n", | |
1632 | dv->devname, strerror(errno)); | |
1633 | if (sysfd >= 0) | |
1634 | close(sysfd); | |
1635 | goto abort; | |
1636 | } | |
1637 | if (sysfd >= 0) | |
1638 | close(sysfd); | |
1639 | sysfd = -1; | |
1640 | count++; | |
1641 | if (verbose >= 0) | |
1642 | pr_err("set %s faulty in %s\n", | |
1643 | dv->devname, devname); | |
1644 | break; | |
1645 | case 'R': /* Mark as replaceable */ | |
1646 | if (subarray) { | |
1647 | pr_err("Cannot replace disks in a \'member\' array, perform this operation on the parent container\n"); | |
1648 | rv = -1; | |
1649 | } else { | |
1650 | if (!frozen) { | |
1651 | if (sysfs_freeze_array(&info) == 1) | |
1652 | frozen = 1; | |
1653 | else | |
1654 | frozen = -1; | |
1655 | } | |
1656 | rv = Manage_replace(tst, fd, dv, | |
1657 | rdev, verbose, | |
1658 | devname); | |
1659 | } | |
1660 | if (rv < 0) | |
1661 | goto abort; | |
1662 | if (rv > 0) | |
1663 | count++; | |
1664 | break; | |
1665 | case 'W': /* --with device that doesn't match */ | |
1666 | pr_err("No matching --replace device for --with %s\n", | |
1667 | dv->devname); | |
1668 | goto abort; | |
1669 | case 'w': /* --with device which was matched */ | |
1670 | rv = Manage_with(tst, fd, dv, | |
1671 | rdev, verbose, devname); | |
1672 | if (rv < 0) | |
1673 | goto abort; | |
1674 | break; | |
1675 | } | |
1676 | } | |
1677 | if (frozen > 0) | |
1678 | sysfs_set_str(&info, NULL, "sync_action","idle"); | |
1679 | if (test && count == 0) | |
1680 | return 2; | |
1681 | return 0; | |
1682 | ||
1683 | abort: | |
1684 | if (frozen > 0) | |
1685 | sysfs_set_str(&info, NULL, "sync_action","idle"); | |
1686 | return !test && busy ? 2 : 1; | |
1687 | } | |
1688 | ||
1689 | int autodetect(void) | |
1690 | { | |
1691 | /* Open any md device, and issue the RAID_AUTORUN ioctl */ | |
1692 | int rv = 1; | |
1693 | int fd = dev_open("9:0", O_RDONLY); | |
1694 | if (fd >= 0) { | |
1695 | if (ioctl(fd, RAID_AUTORUN, 0) == 0) | |
1696 | rv = 0; | |
1697 | close(fd); | |
1698 | } | |
1699 | return rv; | |
1700 | } | |
1701 | ||
1702 | int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident *ident, int verbose) | |
1703 | { | |
1704 | struct supertype supertype, *st = &supertype; | |
1705 | int fd, rv = 2; | |
1706 | ||
1707 | memset(st, 0, sizeof(*st)); | |
1708 | ||
1709 | fd = open_subarray(dev, subarray, st, verbose < 0); | |
1710 | if (fd < 0) | |
1711 | return 2; | |
1712 | ||
1713 | if (!st->ss->update_subarray) { | |
1714 | if (verbose >= 0) | |
1715 | pr_err("Operation not supported for %s metadata\n", | |
1716 | st->ss->name); | |
1717 | goto free_super; | |
1718 | } | |
1719 | ||
1720 | if (mdmon_running(st->devnm)) | |
1721 | st->update_tail = &st->updates; | |
1722 | ||
1723 | rv = st->ss->update_subarray(st, subarray, update, ident); | |
1724 | ||
1725 | if (rv) { | |
1726 | if (verbose >= 0) | |
1727 | pr_err("Failed to update %s of subarray-%s in %s\n", | |
1728 | update, subarray, dev); | |
1729 | } else if (st->update_tail) | |
1730 | flush_metadata_updates(st); | |
1731 | else | |
1732 | st->ss->sync_metadata(st); | |
1733 | ||
1734 | if (rv == 0 && strcmp(update, "name") == 0 && verbose >= 0) | |
1735 | pr_err("Updated subarray-%s name from %s, UUIDs may have changed\n", | |
1736 | subarray, dev); | |
1737 | ||
1738 | free_super: | |
1739 | st->ss->free_super(st); | |
1740 | close(fd); | |
1741 | ||
1742 | return rv; | |
1743 | } | |
1744 | ||
1745 | /* Move spare from one array to another If adding to destination array fails | |
1746 | * add back to original array. | |
1747 | * Returns 1 on success, 0 on failure */ | |
1748 | int move_spare(char *from_devname, char *to_devname, dev_t devid) | |
1749 | { | |
1750 | struct mddev_dev devlist; | |
1751 | char devname[20]; | |
1752 | ||
1753 | /* try to remove and add */ | |
1754 | int fd1 = open(to_devname, O_RDONLY); | |
1755 | int fd2 = open(from_devname, O_RDONLY); | |
1756 | ||
1757 | if (fd1 < 0 || fd2 < 0) { | |
1758 | if (fd1>=0) close(fd1); | |
1759 | if (fd2>=0) close(fd2); | |
1760 | return 0; | |
1761 | } | |
1762 | ||
1763 | devlist.next = NULL; | |
1764 | devlist.used = 0; | |
1765 | devlist.writemostly = FlagDefault; | |
1766 | devlist.failfast = FlagDefault; | |
1767 | devlist.devname = devname; | |
1768 | sprintf(devname, "%d:%d", major(devid), minor(devid)); | |
1769 | ||
1770 | devlist.disposition = 'r'; | |
1771 | if (Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL, 0) == 0) { | |
1772 | devlist.disposition = 'a'; | |
1773 | if (Manage_subdevs(to_devname, fd1, &devlist, -1, 0, NULL, 0) == 0) { | |
1774 | /* make sure manager is aware of changes */ | |
1775 | ping_manager(to_devname); | |
1776 | ping_manager(from_devname); | |
1777 | close(fd1); | |
1778 | close(fd2); | |
1779 | return 1; | |
1780 | } | |
1781 | else Manage_subdevs(from_devname, fd2, &devlist, -1, 0, NULL, 0); | |
1782 | } | |
1783 | close(fd1); | |
1784 | close(fd2); | |
1785 | return 0; | |
1786 | } |