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Commit | Line | Data |
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8382f19b NB |
1 | /* |
2 | * Incremental.c - support --incremental. Part of: | |
3 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
4 | * | |
e736b623 | 5 | * Copyright (C) 2006-2009 Neil Brown <neilb@suse.de> |
8382f19b NB |
6 | * |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | * Author: Neil Brown | |
23 | * Email: <neilb@suse.de> | |
24 | * Paper: Neil Brown | |
25 | * Novell Inc | |
26 | * GPO Box Q1283 | |
27 | * QVB Post Office, NSW 1230 | |
28 | * Australia | |
29 | */ | |
30 | ||
31 | #include "mdadm.h" | |
32 | ||
33 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
34 | struct mdinfo *info); | |
7e0f6979 | 35 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, |
8382f19b NB |
36 | int number, __u64 events, int verbose, |
37 | char *array_name); | |
38 | ||
39 | int Incremental(char *devname, int verbose, int runstop, | |
0ac91628 N |
40 | struct supertype *st, char *homehost, int require_homehost, |
41 | int autof) | |
8382f19b NB |
42 | { |
43 | /* Add this device to an array, creating the array if necessary | |
598f0d58 | 44 | * and starting the array if sensible or - if runstop>0 - if possible. |
8382f19b NB |
45 | * |
46 | * This has several steps: | |
47 | * | |
48 | * 1/ Check if device is permitted by mdadm.conf, reject if not. | |
49 | * 2/ Find metadata, reject if none appropriate (check | |
50 | * version/name from args) | |
51 | * 3/ Check if there is a match in mdadm.conf | |
215bb3f7 N |
52 | * 3a/ if not, check for homehost match. If no match, assemble as |
53 | * a 'foreign' array. | |
8382f19b NB |
54 | * 4/ Determine device number. |
55 | * - If in mdadm.conf with std name, use that | |
56 | * - UUID in /var/run/mdadm.map use that | |
57 | * - If name is suggestive, use that. unless in use with different uuid. | |
58 | * - Choose a free, high number. | |
59 | * - Use a partitioned device unless strong suggestion not to. | |
60 | * e.g. auto=md | |
352452c3 | 61 | * Don't choose partitioned for containers. |
8382f19b NB |
62 | * 5/ Find out if array already exists |
63 | * 5a/ if it does not | |
64 | * - choose a name, from mdadm.conf or 'name' field in array. | |
65 | * - create the array | |
66 | * - add the device | |
67 | * 5b/ if it does | |
68 | * - check one drive in array to make sure metadata is a reasonably | |
69 | * close match. Reject if not (e.g. different type) | |
70 | * - add the device | |
71 | * 6/ Make sure /var/run/mdadm.map contains this array. | |
72 | * 7/ Is there enough devices to possibly start the array? | |
352452c3 | 73 | * For a container, this means running Incremental_container. |
8382f19b NB |
74 | * 7a/ if not, finish with success. |
75 | * 7b/ if yes, | |
76 | * - read all metadata and arrange devices like -A does | |
77 | * - if number of OK devices match expected, or -R and there are enough, | |
78 | * start the array (auto-readonly). | |
79 | */ | |
80 | struct stat stb; | |
7e83544b | 81 | struct mdinfo info, dinfo; |
8382f19b NB |
82 | struct mddev_ident_s *array_list, *match; |
83 | char chosen_name[1024]; | |
15d4a7e4 | 84 | int rv = 1; |
8382f19b | 85 | struct map_ent *mp, *map = NULL; |
15d4a7e4 | 86 | int dfd = -1, mdfd = -1; |
8382f19b NB |
87 | char *avail; |
88 | int active_disks; | |
215bb3f7 | 89 | int trustworthy = FOREIGN; |
d7288ddc | 90 | char *name_to_use; |
ad5bc697 | 91 | mdu_array_info_t ainf; |
7e83544b | 92 | struct dev_policy *policy = NULL; |
8382f19b NB |
93 | |
94 | struct createinfo *ci = conf_get_create_info(); | |
95 | ||
8382f19b | 96 | |
352452c3 | 97 | /* 1/ Check if device is permitted by mdadm.conf */ |
8382f19b NB |
98 | |
99 | if (!conf_test_dev(devname)) { | |
100 | if (verbose >= 0) | |
101 | fprintf(stderr, Name | |
102 | ": %s not permitted by mdadm.conf.\n", | |
103 | devname); | |
15d4a7e4 | 104 | goto out; |
8382f19b NB |
105 | } |
106 | ||
107 | /* 2/ Find metadata, reject if none appropriate (check | |
108 | * version/name from args) */ | |
109 | ||
110 | dfd = dev_open(devname, O_RDONLY|O_EXCL); | |
111 | if (dfd < 0) { | |
112 | if (verbose >= 0) | |
113 | fprintf(stderr, Name ": cannot open %s: %s.\n", | |
114 | devname, strerror(errno)); | |
15d4a7e4 | 115 | goto out; |
8382f19b NB |
116 | } |
117 | if (fstat(dfd, &stb) < 0) { | |
118 | if (verbose >= 0) | |
119 | fprintf(stderr, Name ": fstat failed for %s: %s.\n", | |
120 | devname, strerror(errno)); | |
15d4a7e4 | 121 | goto out; |
8382f19b NB |
122 | } |
123 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
124 | if (verbose >= 0) | |
125 | fprintf(stderr, Name ": %s is not a block device.\n", | |
126 | devname); | |
15d4a7e4 | 127 | goto out; |
8382f19b NB |
128 | } |
129 | ||
7e83544b N |
130 | dinfo.disk.major = major(stb.st_rdev); |
131 | dinfo.disk.minor = minor(stb.st_rdev); | |
132 | ||
133 | policy = disk_policy(&dinfo); | |
134 | ||
8382f19b NB |
135 | if (st == NULL && (st = guess_super(dfd)) == NULL) { |
136 | if (verbose >= 0) | |
137 | fprintf(stderr, Name | |
138 | ": no recognisable superblock on %s.\n", | |
139 | devname); | |
15d4a7e4 | 140 | goto out; |
8382f19b | 141 | } |
3da92f27 | 142 | if (st->ss->load_super(st, dfd, NULL)) { |
8382f19b NB |
143 | if (verbose >= 0) |
144 | fprintf(stderr, Name ": no RAID superblock on %s.\n", | |
145 | devname); | |
15d4a7e4 | 146 | goto out; |
8382f19b | 147 | } |
15d4a7e4 | 148 | close (dfd); dfd = -1; |
8382f19b | 149 | |
f35f2525 | 150 | memset(&info, 0, sizeof(info)); |
598f0d58 | 151 | st->ss->getinfo_super(st, &info); |
8382f19b NB |
152 | /* 3/ Check if there is a match in mdadm.conf */ |
153 | ||
154 | array_list = conf_get_ident(NULL); | |
155 | match = NULL; | |
156 | for (; array_list; array_list = array_list->next) { | |
157 | if (array_list->uuid_set && | |
158 | same_uuid(array_list->uuid, info.uuid, st->ss->swapuuid) | |
159 | == 0) { | |
fe056d1f | 160 | if (verbose >= 2 && array_list->devname) |
8382f19b NB |
161 | fprintf(stderr, Name |
162 | ": UUID differs from %s.\n", | |
163 | array_list->devname); | |
164 | continue; | |
165 | } | |
166 | if (array_list->name[0] && | |
167 | strcasecmp(array_list->name, info.name) != 0) { | |
fe056d1f | 168 | if (verbose >= 2 && array_list->devname) |
8382f19b NB |
169 | fprintf(stderr, Name |
170 | ": Name differs from %s.\n", | |
171 | array_list->devname); | |
172 | continue; | |
173 | } | |
174 | if (array_list->devices && | |
175 | !match_oneof(array_list->devices, devname)) { | |
fe056d1f | 176 | if (verbose >= 2 && array_list->devname) |
8382f19b NB |
177 | fprintf(stderr, Name |
178 | ": Not a listed device for %s.\n", | |
179 | array_list->devname); | |
180 | continue; | |
181 | } | |
182 | if (array_list->super_minor != UnSet && | |
183 | array_list->super_minor != info.array.md_minor) { | |
fe056d1f | 184 | if (verbose >= 2 && array_list->devname) |
8382f19b NB |
185 | fprintf(stderr, Name |
186 | ": Different super-minor to %s.\n", | |
187 | array_list->devname); | |
188 | continue; | |
189 | } | |
190 | if (!array_list->uuid_set && | |
191 | !array_list->name[0] && | |
192 | !array_list->devices && | |
193 | array_list->super_minor == UnSet) { | |
fe056d1f | 194 | if (verbose >= 2 && array_list->devname) |
8382f19b NB |
195 | fprintf(stderr, Name |
196 | ": %s doesn't have any identifying information.\n", | |
197 | array_list->devname); | |
198 | continue; | |
199 | } | |
200 | /* FIXME, should I check raid_disks and level too?? */ | |
201 | ||
202 | if (match) { | |
fe056d1f N |
203 | if (verbose >= 0) { |
204 | if (match->devname && array_list->devname) | |
205 | fprintf(stderr, Name | |
8382f19b | 206 | ": we match both %s and %s - cannot decide which to use.\n", |
fe056d1f N |
207 | match->devname, array_list->devname); |
208 | else | |
209 | fprintf(stderr, Name | |
210 | ": multiple lines in mdadm.conf match\n"); | |
211 | } | |
15d4a7e4 N |
212 | rv = 2; |
213 | goto out; | |
8382f19b NB |
214 | } |
215 | match = array_list; | |
216 | } | |
217 | ||
112cace6 N |
218 | if (match && match->devname |
219 | && strcasecmp(match->devname, "<ignore>") == 0) { | |
220 | if (verbose >= 0) | |
221 | fprintf(stderr, Name ": array containing %s is explicitly" | |
222 | " ignored by mdadm.conf\n", | |
223 | devname); | |
15d4a7e4 | 224 | goto out; |
112cace6 N |
225 | } |
226 | ||
7b403fef N |
227 | /* 3a/ if not, check for homehost match. If no match, continue |
228 | * but don't trust the 'name' in the array. Thus a 'random' minor | |
229 | * number will be assigned, and the device name will be based | |
230 | * on that. */ | |
215bb3f7 N |
231 | if (match) |
232 | trustworthy = LOCAL; | |
d1d3482b N |
233 | else if (st->ss->match_home(st, homehost) == 1) |
234 | trustworthy = LOCAL; | |
235 | else if (st->ss->match_home(st, "any") == 1) | |
236 | trustworthy = LOCAL_ANY; | |
215bb3f7 | 237 | else |
d1d3482b N |
238 | trustworthy = FOREIGN; |
239 | ||
240 | ||
241 | if (!match && !conf_test_metadata(st->ss->name, | |
242 | (trustworthy == LOCAL))) { | |
243 | if (verbose >= 1) | |
244 | fprintf(stderr, Name | |
245 | ": %s has metadata type %s for which " | |
246 | "auto-assembly is disabled\n", | |
247 | devname, st->ss->name); | |
15d4a7e4 | 248 | goto out; |
d1d3482b N |
249 | } |
250 | if (trustworthy == LOCAL_ANY) | |
ecb02e31 | 251 | trustworthy = LOCAL; |
e12e1d1d | 252 | |
4ef2f11e N |
253 | /* There are three possible sources for 'autof': command line, |
254 | * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf. | |
350ac35d N |
255 | * ARRAY takes precedence, then command line, then |
256 | * CREATE. | |
4ef2f11e | 257 | */ |
350ac35d | 258 | if (match && match->autof) |
4ef2f11e N |
259 | autof = match->autof; |
260 | if (autof == 0) | |
261 | autof = ci->autof; | |
262 | ||
215bb3f7 | 263 | if (st->ss->container_content && st->loaded_container) { |
97b4d0e9 DW |
264 | if ((runstop > 0 && info.container_enough >= 0) || |
265 | info.container_enough > 0) | |
266 | /* pass */; | |
267 | else { | |
268 | if (verbose) | |
269 | fprintf(stderr, Name ": not enough devices to start the container\n"); | |
15d4a7e4 N |
270 | rv = 0; |
271 | goto out; | |
97b4d0e9 DW |
272 | } |
273 | ||
215bb3f7 N |
274 | /* This is a pre-built container array, so we do something |
275 | * rather different. | |
276 | */ | |
15d4a7e4 | 277 | rv = Incremental_container(st, devname, verbose, runstop, |
215bb3f7 | 278 | autof, trustworthy); |
15d4a7e4 | 279 | goto out; |
8382f19b | 280 | } |
ecb02e31 | 281 | |
7cdc0872 | 282 | name_to_use = info.name; |
0ac91628 | 283 | if (name_to_use[0] == 0 && |
ecb02e31 N |
284 | info.array.level == LEVEL_CONTAINER && |
285 | trustworthy == LOCAL) { | |
286 | name_to_use = info.text_version; | |
287 | trustworthy = METADATA; | |
288 | } | |
0ac91628 N |
289 | if (name_to_use[0] && trustworthy != LOCAL && |
290 | ! require_homehost && | |
291 | conf_name_is_free(name_to_use)) | |
292 | trustworthy = LOCAL; | |
ecb02e31 | 293 | |
7cdc0872 N |
294 | /* strip "hostname:" prefix from name if we have decided |
295 | * to treat it as LOCAL | |
296 | */ | |
297 | if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL) | |
298 | name_to_use = strchr(name_to_use, ':')+1; | |
299 | ||
ad5bc697 | 300 | /* 4/ Check if array exists. |
215bb3f7 | 301 | */ |
93c861ee DL |
302 | if (map_lock(&map)) |
303 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
304 | "mapfile\n"); | |
215bb3f7 | 305 | mp = map_by_uuid(&map, info.uuid); |
339c2d6c N |
306 | if (mp) |
307 | mdfd = open_dev(mp->devnum); | |
308 | else | |
215bb3f7 | 309 | mdfd = -1; |
d7288ddc | 310 | |
8382f19b | 311 | if (mdfd < 0) { |
7e0f6979 | 312 | struct mdinfo *sra; |
8382f19b | 313 | |
215bb3f7 | 314 | /* Couldn't find an existing array, maybe make a new one */ |
ffb3e494 | 315 | mdfd = create_mddev(match ? match->devname : NULL, |
e12e1d1d | 316 | name_to_use, autof, trustworthy, chosen_name); |
215bb3f7 N |
317 | |
318 | if (mdfd < 0) | |
15d4a7e4 | 319 | goto out; |
215bb3f7 N |
320 | |
321 | sysfs_init(&info, mdfd, 0); | |
322 | ||
f35f2525 N |
323 | if (set_array_info(mdfd, st, &info) != 0) { |
324 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", | |
8382f19b | 325 | chosen_name, strerror(errno)); |
15d4a7e4 N |
326 | rv = 2; |
327 | goto out; | |
8382f19b | 328 | } |
7801ac20 | 329 | |
c5afc314 N |
330 | dinfo = info; |
331 | dinfo.disk.major = major(stb.st_rdev); | |
332 | dinfo.disk.minor = minor(stb.st_rdev); | |
333 | if (add_disk(mdfd, st, &info, &dinfo) != 0) { | |
8382f19b NB |
334 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", |
335 | devname, chosen_name, strerror(errno)); | |
336 | ioctl(mdfd, STOP_ARRAY, 0); | |
15d4a7e4 N |
337 | rv = 2; |
338 | goto out; | |
8382f19b | 339 | } |
197e3eb6 | 340 | sra = sysfs_read(mdfd, fd2devnum(mdfd), GET_DEVS); |
06c7f68e | 341 | if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) { |
8382f19b NB |
342 | /* It really should be 'none' - must be old buggy |
343 | * kernel, and mdadm -I may not be able to complete. | |
344 | * So reject it. | |
345 | */ | |
346 | ioctl(mdfd, STOP_ARRAY, NULL); | |
347 | fprintf(stderr, Name | |
348 | ": You have an old buggy kernel which cannot support\n" | |
349 | " --incremental reliably. Aborting.\n"); | |
8382f19b | 350 | sysfs_free(sra); |
15d4a7e4 N |
351 | rv = 2; |
352 | goto out; | |
8382f19b | 353 | } |
c5afc314 | 354 | info.array.working_disks = 1; |
f35f2525 | 355 | sysfs_free(sra); |
ad5bc697 N |
356 | /* 6/ Make sure /var/run/mdadm.map contains this array. */ |
357 | map_update(&map, fd2devnum(mdfd), | |
358 | info.text_version, | |
359 | info.uuid, chosen_name); | |
8382f19b NB |
360 | } else { |
361 | /* 5b/ if it does */ | |
362 | /* - check one drive in array to make sure metadata is a reasonably */ | |
363 | /* close match. Reject if not (e.g. different type) */ | |
364 | /* - add the device */ | |
365 | char dn[20]; | |
366 | int dfd2; | |
8382f19b | 367 | int err; |
7e0f6979 | 368 | struct mdinfo *sra; |
3da92f27 | 369 | struct supertype *st2; |
c5afc314 | 370 | struct mdinfo info2, *d; |
215bb3f7 | 371 | |
339c2d6c N |
372 | if (mp->path) |
373 | strcpy(chosen_name, mp->path); | |
374 | else | |
375 | strcpy(chosen_name, devnum2devname(mp->devnum)); | |
215bb3f7 | 376 | |
ef83fe7c N |
377 | /* It is generally not OK to add non-spare drives to a |
378 | * running array as they are probably missing because | |
379 | * they failed. However if runstop is 1, then the | |
7e83544b N |
380 | * array was possibly started early and our best bet is |
381 | * to add this anyway. | |
382 | * Also if action policy is re-add or better we allow | |
383 | * re-add | |
3a6ec29a | 384 | */ |
ef83fe7c | 385 | if ((info.disk.state & (1<<MD_DISK_SYNC)) != 0 |
7e83544b N |
386 | && ! policy_action_allows(policy, st->ss->name, |
387 | act_re_add) | |
ef83fe7c | 388 | && runstop < 1) { |
1dccfff9 DW |
389 | int active = 0; |
390 | ||
391 | if (st->ss->external) { | |
392 | char *devname = devnum2devname(fd2devnum(mdfd)); | |
393 | ||
394 | active = devname && is_container_active(devname); | |
395 | free(devname); | |
396 | } else if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) | |
397 | active = 1; | |
398 | if (active) { | |
3a6ec29a N |
399 | fprintf(stderr, Name |
400 | ": not adding %s to active array (without --run) %s\n", | |
401 | devname, chosen_name); | |
15d4a7e4 N |
402 | rv = 2; |
403 | goto out; | |
3a6ec29a N |
404 | } |
405 | } | |
197e3eb6 | 406 | sra = sysfs_read(mdfd, fd2devnum(mdfd), (GET_DEVS | GET_STATE)); |
15d4a7e4 N |
407 | if (!sra) { |
408 | rv = 2; | |
409 | goto out; | |
410 | } | |
7c548327 N |
411 | if (sra->devs) { |
412 | sprintf(dn, "%d:%d", sra->devs->disk.major, | |
413 | sra->devs->disk.minor); | |
414 | dfd2 = dev_open(dn, O_RDONLY); | |
415 | st2 = dup_super(st); | |
416 | if (st2->ss->load_super(st2, dfd2, NULL) || | |
417 | st->ss->compare_super(st, st2) != 0) { | |
418 | fprintf(stderr, Name | |
419 | ": metadata mismatch between %s and " | |
420 | "chosen array %s\n", | |
421 | devname, chosen_name); | |
7c548327 | 422 | close(dfd2); |
15d4a7e4 N |
423 | rv = 2; |
424 | goto out; | |
7c548327 | 425 | } |
8382f19b | 426 | close(dfd2); |
7c548327 N |
427 | memset(&info2, 0, sizeof(info2)); |
428 | st2->ss->getinfo_super(st2, &info2); | |
429 | st2->ss->free_super(st2); | |
430 | if (info.array.level != info2.array.level || | |
431 | memcmp(info.uuid, info2.uuid, 16) != 0 || | |
432 | info.array.raid_disks != info2.array.raid_disks) { | |
433 | fprintf(stderr, Name | |
434 | ": unexpected difference between %s and %s.\n", | |
435 | chosen_name, devname); | |
15d4a7e4 N |
436 | rv = 2; |
437 | goto out; | |
7c548327 | 438 | } |
8382f19b | 439 | } |
7801ac20 N |
440 | info2.disk.major = major(stb.st_rdev); |
441 | info2.disk.minor = minor(stb.st_rdev); | |
c5afc314 N |
442 | /* add disk needs to know about containers */ |
443 | if (st->ss->external) | |
444 | sra->array.level = LEVEL_CONTAINER; | |
ac7de9d9 | 445 | err = add_disk(mdfd, st, sra, &info2); |
8382f19b NB |
446 | if (err < 0 && errno == EBUSY) { |
447 | /* could be another device present with the same | |
448 | * disk.number. Find and reject any such | |
449 | */ | |
450 | find_reject(mdfd, st, sra, info.disk.number, | |
451 | info.events, verbose, chosen_name); | |
ac7de9d9 | 452 | err = add_disk(mdfd, st, sra, &info2); |
8382f19b NB |
453 | } |
454 | if (err < 0) { | |
455 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", | |
456 | devname, chosen_name, strerror(errno)); | |
15d4a7e4 N |
457 | rv = 2; |
458 | goto out; | |
8382f19b | 459 | } |
c5afc314 N |
460 | info.array.working_disks = 0; |
461 | for (d = sra->devs; d; d=d->next) | |
462 | info.array.working_disks ++; | |
463 | ||
8382f19b | 464 | } |
8382f19b NB |
465 | |
466 | /* 7/ Is there enough devices to possibly start the array? */ | |
467 | /* 7a/ if not, finish with success. */ | |
352452c3 N |
468 | if (info.array.level == LEVEL_CONTAINER) { |
469 | /* Try to assemble within the container */ | |
ad5bc697 | 470 | map_unlock(&map); |
97590376 | 471 | sysfs_uevent(&info, "change"); |
c5afc314 N |
472 | if (verbose >= 0) |
473 | fprintf(stderr, Name | |
474 | ": container %s now has %d devices\n", | |
475 | chosen_name, info.array.working_disks); | |
a7c6e3fb N |
476 | wait_for(chosen_name, mdfd); |
477 | close(mdfd); | |
03b7f6c6 | 478 | rv = Incremental(chosen_name, verbose, runstop, |
0ac91628 | 479 | NULL, homehost, require_homehost, autof); |
03b7f6c6 N |
480 | if (rv == 1) |
481 | /* Don't fail the whole -I if a subarray didn't | |
482 | * have enough devices to start yet | |
483 | */ | |
484 | rv = 0; | |
485 | return rv; | |
352452c3 | 486 | } |
f8409e54 | 487 | avail = NULL; |
8382f19b NB |
488 | active_disks = count_active(st, mdfd, &avail, &info); |
489 | if (enough(info.array.level, info.array.raid_disks, | |
490 | info.array.layout, info.array.state & 1, | |
3288b419 | 491 | avail, active_disks) == 0) { |
8382f19b NB |
492 | free(avail); |
493 | if (verbose >= 0) | |
494 | fprintf(stderr, Name | |
495 | ": %s attached to %s, not enough to start (%d).\n", | |
496 | devname, chosen_name, active_disks); | |
ad5bc697 | 497 | map_unlock(&map); |
15d4a7e4 N |
498 | rv = 0; |
499 | goto out; | |
8382f19b NB |
500 | } |
501 | free(avail); | |
502 | ||
503 | /* 7b/ if yes, */ | |
504 | /* - if number of OK devices match expected, or -R and there */ | |
505 | /* are enough, */ | |
506 | /* + add any bitmap file */ | |
507 | /* + start the array (auto-readonly). */ | |
8382f19b NB |
508 | |
509 | if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) { | |
510 | if (verbose >= 0) | |
511 | fprintf(stderr, Name | |
512 | ": %s attached to %s which is already active.\n", | |
513 | devname, chosen_name); | |
ad5bc697 | 514 | map_unlock(&map); |
15d4a7e4 N |
515 | rv = 0; |
516 | goto out; | |
8382f19b | 517 | } |
ad5bc697 N |
518 | |
519 | map_unlock(&map); | |
8382f19b | 520 | if (runstop > 0 || active_disks >= info.array.working_disks) { |
7e83544b | 521 | struct mdinfo *sra, *dsk; |
8382f19b NB |
522 | /* Let's try to start it */ |
523 | if (match && match->bitmap_file) { | |
524 | int bmfd = open(match->bitmap_file, O_RDWR); | |
525 | if (bmfd < 0) { | |
526 | fprintf(stderr, Name | |
527 | ": Could not open bitmap file %s.\n", | |
528 | match->bitmap_file); | |
15d4a7e4 | 529 | goto out; |
8382f19b NB |
530 | } |
531 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
532 | close(bmfd); | |
533 | fprintf(stderr, Name | |
534 | ": Failed to set bitmapfile for %s.\n", | |
535 | chosen_name); | |
15d4a7e4 | 536 | goto out; |
8382f19b NB |
537 | } |
538 | close(bmfd); | |
539 | } | |
7e83544b N |
540 | /* GET_* needed so add_disk works below */ |
541 | sra = sysfs_read(mdfd, fd2devnum(mdfd), | |
542 | GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE); | |
7b403fef | 543 | if ((sra == NULL || active_disks >= info.array.working_disks) |
215bb3f7 | 544 | && trustworthy != FOREIGN) |
8382f19b NB |
545 | rv = ioctl(mdfd, RUN_ARRAY, NULL); |
546 | else | |
547 | rv = sysfs_set_str(sra, NULL, | |
548 | "array_state", "read-auto"); | |
549 | if (rv == 0) { | |
550 | if (verbose >= 0) | |
551 | fprintf(stderr, Name | |
7e83544b | 552 | ": %s attached to %s, which has been started.\n", |
8382f19b NB |
553 | devname, chosen_name); |
554 | rv = 0; | |
a7c6e3fb | 555 | wait_for(chosen_name, mdfd); |
7e83544b N |
556 | /* We just started the array, so some devices |
557 | * might have been evicted from the array | |
558 | * because their event counts were too old. | |
559 | * If the action=re-add policy is in-force for | |
560 | * those devices we should re-add them now. | |
561 | */ | |
562 | for (dsk = sra->devs; dsk ; dsk = dsk->next) { | |
563 | if (disk_action_allows(dsk, st->ss->name, act_re_add) && | |
564 | add_disk(mdfd, st, sra, dsk) == 0) | |
565 | fprintf(stderr, Name | |
566 | ": %s re-added to %s\n", | |
567 | dsk->sys_name, chosen_name); | |
568 | } | |
8382f19b NB |
569 | } else { |
570 | fprintf(stderr, Name | |
571 | ": %s attached to %s, but failed to start: %s.\n", | |
572 | devname, chosen_name, strerror(errno)); | |
573 | rv = 1; | |
574 | } | |
575 | } else { | |
576 | if (verbose >= 0) | |
577 | fprintf(stderr, Name | |
578 | ": %s attached to %s, not enough to start safely.\n", | |
579 | devname, chosen_name); | |
580 | rv = 0; | |
581 | } | |
15d4a7e4 N |
582 | out: |
583 | if (dfd >= 0) | |
584 | close(dfd); | |
585 | if (mdfd >= 0) | |
586 | close(mdfd); | |
7e83544b N |
587 | if (policy) |
588 | dev_policy_free(policy); | |
8382f19b NB |
589 | return rv; |
590 | } | |
591 | ||
7e0f6979 | 592 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, |
8382f19b NB |
593 | int number, __u64 events, int verbose, |
594 | char *array_name) | |
595 | { | |
3da92f27 | 596 | /* Find a device attached to this array with a disk.number of number |
8382f19b NB |
597 | * and events less than the passed events, and remove the device. |
598 | */ | |
06c7f68e | 599 | struct mdinfo *d; |
8382f19b NB |
600 | mdu_array_info_t ra; |
601 | ||
602 | if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0) | |
603 | return; /* not safe to remove from active arrays | |
604 | * without thinking more */ | |
605 | ||
606 | for (d = sra->devs; d ; d = d->next) { | |
607 | char dn[10]; | |
608 | int dfd; | |
8382f19b | 609 | struct mdinfo info; |
06c7f68e | 610 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); |
8382f19b NB |
611 | dfd = dev_open(dn, O_RDONLY); |
612 | if (dfd < 0) | |
613 | continue; | |
3da92f27 | 614 | if (st->ss->load_super(st, dfd, NULL)) { |
8382f19b NB |
615 | close(dfd); |
616 | continue; | |
617 | } | |
3da92f27 NB |
618 | st->ss->getinfo_super(st, &info); |
619 | st->ss->free_super(st); | |
8382f19b NB |
620 | close(dfd); |
621 | ||
622 | if (info.disk.number != number || | |
623 | info.events >= events) | |
624 | continue; | |
625 | ||
06c7f68e | 626 | if (d->disk.raid_disk > -1) |
8382f19b NB |
627 | sysfs_set_str(sra, d, "slot", "none"); |
628 | if (sysfs_set_str(sra, d, "state", "remove") == 0) | |
629 | if (verbose >= 0) | |
630 | fprintf(stderr, Name | |
631 | ": removing old device %s from %s\n", | |
06c7f68e | 632 | d->sys_name+4, array_name); |
8382f19b NB |
633 | } |
634 | } | |
635 | ||
636 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
637 | struct mdinfo *bestinfo) | |
638 | { | |
639 | /* count how many devices in sra think they are active */ | |
06c7f68e | 640 | struct mdinfo *d; |
8382f19b NB |
641 | int cnt = 0, cnt1 = 0; |
642 | __u64 max_events = 0; | |
7e0f6979 | 643 | struct mdinfo *sra = sysfs_read(mdfd, -1, GET_DEVS | GET_STATE); |
8382f19b NB |
644 | char *avail = NULL; |
645 | ||
b526e52d DW |
646 | if (!sra) |
647 | return 0; | |
648 | ||
8382f19b NB |
649 | for (d = sra->devs ; d ; d = d->next) { |
650 | char dn[30]; | |
651 | int dfd; | |
8382f19b NB |
652 | int ok; |
653 | struct mdinfo info; | |
654 | ||
06c7f68e | 655 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); |
8382f19b NB |
656 | dfd = dev_open(dn, O_RDONLY); |
657 | if (dfd < 0) | |
658 | continue; | |
3da92f27 | 659 | ok = st->ss->load_super(st, dfd, NULL); |
8382f19b NB |
660 | close(dfd); |
661 | if (ok != 0) | |
662 | continue; | |
3da92f27 | 663 | st->ss->getinfo_super(st, &info); |
43aaf431 DL |
664 | if (!avail) { |
665 | avail = malloc(info.array.raid_disks); | |
666 | if (!avail) { | |
667 | fprintf(stderr, Name ": out of memory.\n"); | |
668 | exit(1); | |
669 | } | |
670 | memset(avail, 0, info.array.raid_disks); | |
671 | *availp = avail; | |
672 | } | |
673 | ||
8382f19b NB |
674 | if (info.disk.state & (1<<MD_DISK_SYNC)) |
675 | { | |
8382f19b NB |
676 | if (cnt == 0) { |
677 | cnt++; | |
678 | max_events = info.events; | |
679 | avail[info.disk.raid_disk] = 2; | |
3da92f27 | 680 | st->ss->getinfo_super(st, bestinfo); |
8382f19b NB |
681 | } else if (info.events == max_events) { |
682 | cnt++; | |
683 | avail[info.disk.raid_disk] = 2; | |
684 | } else if (info.events == max_events-1) { | |
685 | cnt1++; | |
686 | avail[info.disk.raid_disk] = 1; | |
687 | } else if (info.events < max_events - 1) | |
688 | ; | |
689 | else if (info.events == max_events+1) { | |
690 | int i; | |
691 | cnt1 = cnt; | |
692 | cnt = 1; | |
693 | max_events = info.events; | |
694 | for (i=0; i<info.array.raid_disks; i++) | |
695 | if (avail[i]) | |
696 | avail[i]--; | |
697 | avail[info.disk.raid_disk] = 2; | |
3da92f27 | 698 | st->ss->getinfo_super(st, bestinfo); |
8382f19b NB |
699 | } else { /* info.events much bigger */ |
700 | cnt = 1; cnt1 = 0; | |
701 | memset(avail, 0, info.disk.raid_disk); | |
702 | max_events = info.events; | |
3da92f27 | 703 | st->ss->getinfo_super(st, bestinfo); |
8382f19b NB |
704 | } |
705 | } | |
3da92f27 | 706 | st->ss->free_super(st); |
8382f19b NB |
707 | } |
708 | return cnt + cnt1; | |
709 | } | |
710 | ||
8382f19b NB |
711 | int IncrementalScan(int verbose) |
712 | { | |
713 | /* look at every device listed in the 'map' file. | |
714 | * If one is found that is not running then: | |
715 | * look in mdadm.conf for bitmap file. | |
716 | * if one exists, but array has none, add it. | |
717 | * try to start array in auto-readonly mode | |
718 | */ | |
719 | struct map_ent *mapl = NULL; | |
720 | struct map_ent *me; | |
721 | mddev_ident_t devs, mddev; | |
722 | int rv = 0; | |
723 | ||
724 | map_read(&mapl); | |
725 | devs = conf_get_ident(NULL); | |
726 | ||
727 | for (me = mapl ; me ; me = me->next) { | |
8382f19b NB |
728 | mdu_array_info_t array; |
729 | mdu_bitmap_file_t bmf; | |
7e0f6979 | 730 | struct mdinfo *sra; |
339c2d6c | 731 | int mdfd = open_dev(me->devnum); |
215bb3f7 | 732 | |
8382f19b NB |
733 | if (mdfd < 0) |
734 | continue; | |
735 | if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 || | |
736 | errno != ENODEV) { | |
737 | close(mdfd); | |
738 | continue; | |
739 | } | |
740 | /* Ok, we can try this one. Maybe it needs a bitmap */ | |
741 | for (mddev = devs ; mddev ; mddev = mddev->next) | |
339c2d6c | 742 | if (mddev->devname && me->path |
2400e6eb | 743 | && devname_matches(mddev->devname, me->path)) |
8382f19b NB |
744 | break; |
745 | if (mddev && mddev->bitmap_file) { | |
746 | /* | |
747 | * Note: early kernels will wrongly fail this, so it | |
748 | * is a hint only | |
749 | */ | |
750 | int added = -1; | |
751 | if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) { | |
752 | int bmfd = open(mddev->bitmap_file, O_RDWR); | |
753 | if (bmfd >= 0) { | |
754 | added = ioctl(mdfd, SET_BITMAP_FILE, | |
755 | bmfd); | |
756 | close(bmfd); | |
757 | } | |
758 | } | |
759 | if (verbose >= 0) { | |
760 | if (added == 0) | |
761 | fprintf(stderr, Name | |
762 | ": Added bitmap %s to %s\n", | |
763 | mddev->bitmap_file, me->path); | |
764 | else if (errno != EEXIST) | |
765 | fprintf(stderr, Name | |
766 | ": Failed to add bitmap to %s: %s\n", | |
767 | me->path, strerror(errno)); | |
768 | } | |
769 | } | |
770 | sra = sysfs_read(mdfd, 0, 0); | |
771 | if (sra) { | |
772 | if (sysfs_set_str(sra, NULL, | |
773 | "array_state", "read-auto") == 0) { | |
774 | if (verbose >= 0) | |
775 | fprintf(stderr, Name | |
776 | ": started array %s\n", | |
339c2d6c | 777 | me->path ?: devnum2devname(me->devnum)); |
8382f19b NB |
778 | } else { |
779 | fprintf(stderr, Name | |
780 | ": failed to start array %s: %s\n", | |
339c2d6c N |
781 | me->path ?: devnum2devname(me->devnum), |
782 | strerror(errno)); | |
8382f19b NB |
783 | rv = 1; |
784 | } | |
785 | } | |
786 | } | |
787 | return rv; | |
788 | } | |
598f0d58 | 789 | |
1771a6e2 N |
790 | static char *container2devname(char *devname) |
791 | { | |
792 | char *mdname = NULL; | |
793 | ||
794 | if (devname[0] == '/') { | |
795 | int fd = open(devname, O_RDONLY); | |
796 | if (fd >= 0) { | |
797 | mdname = devnum2devname(fd2devnum(fd)); | |
798 | close(fd); | |
799 | } | |
800 | } else { | |
801 | int uuid[4]; | |
802 | struct map_ent *mp, *map = NULL; | |
803 | ||
804 | if (!parse_uuid(devname, uuid)) | |
805 | return mdname; | |
806 | mp = map_by_uuid(&map, uuid); | |
807 | if (mp) | |
808 | mdname = devnum2devname(mp->devnum); | |
809 | map_free(map); | |
810 | } | |
811 | ||
812 | return mdname; | |
813 | } | |
814 | ||
598f0d58 | 815 | int Incremental_container(struct supertype *st, char *devname, int verbose, |
215bb3f7 | 816 | int runstop, int autof, int trustworthy) |
598f0d58 NB |
817 | { |
818 | /* Collect the contents of this container and for each | |
819 | * array, choose a device name and assemble the array. | |
820 | */ | |
821 | ||
822 | struct mdinfo *list = st->ss->container_content(st); | |
823 | struct mdinfo *ra; | |
ad5bc697 N |
824 | struct map_ent *map = NULL; |
825 | ||
93c861ee DL |
826 | if (map_lock(&map)) |
827 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
828 | "mapfile\n"); | |
598f0d58 NB |
829 | |
830 | for (ra = list ; ra ; ra = ra->next) { | |
598f0d58 NB |
831 | int mdfd; |
832 | char chosen_name[1024]; | |
ad5bc697 | 833 | struct map_ent *mp; |
dbb44303 | 834 | struct mddev_ident_s *match = NULL; |
598f0d58 | 835 | |
c5afc314 | 836 | mp = map_by_uuid(&map, ra->uuid); |
d7288ddc | 837 | |
30926600 N |
838 | if (mp) { |
839 | mdfd = open_dev(mp->devnum); | |
339c2d6c N |
840 | if (mp->path) |
841 | strcpy(chosen_name, mp->path); | |
842 | else | |
843 | strcpy(chosen_name, devnum2devname(mp->devnum)); | |
30926600 | 844 | } else { |
dbb44303 | 845 | |
112cace6 | 846 | /* Check in mdadm.conf for container == devname and |
dbb44303 N |
847 | * member == ra->text_version after second slash. |
848 | */ | |
849 | char *sub = strchr(ra->text_version+1, '/'); | |
850 | struct mddev_ident_s *array_list; | |
851 | if (sub) { | |
852 | sub++; | |
853 | array_list = conf_get_ident(NULL); | |
854 | } else | |
855 | array_list = NULL; | |
856 | for(; array_list ; array_list = array_list->next) { | |
dbb44303 N |
857 | char *dn; |
858 | if (array_list->member == NULL || | |
859 | array_list->container == NULL) | |
860 | continue; | |
861 | if (strcmp(array_list->member, sub) != 0) | |
862 | continue; | |
71d60c48 DW |
863 | if (array_list->uuid_set && |
864 | !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid)) | |
865 | continue; | |
1771a6e2 N |
866 | dn = container2devname(array_list->container); |
867 | if (dn == NULL) | |
dbb44303 | 868 | continue; |
dbb44303 N |
869 | if (strncmp(dn, ra->text_version+1, |
870 | strlen(dn)) != 0 || | |
871 | ra->text_version[strlen(dn)+1] != '/') { | |
872 | free(dn); | |
873 | continue; | |
874 | } | |
875 | free(dn); | |
876 | /* we have a match */ | |
877 | match = array_list; | |
71d60c48 DW |
878 | if (verbose>0) |
879 | fprintf(stderr, Name ": match found for member %s\n", | |
880 | array_list->member); | |
dbb44303 N |
881 | break; |
882 | } | |
dbb44303 | 883 | |
112cace6 N |
884 | if (match && match->devname && |
885 | strcasecmp(match->devname, "<ignore>") == 0) { | |
886 | if (verbose > 0) | |
887 | fprintf(stderr, Name ": array %s/%s is " | |
888 | "explicitly ignored by mdadm.conf\n", | |
889 | match->container, match->member); | |
890 | return 2; | |
891 | } | |
05833051 N |
892 | if (match) |
893 | trustworthy = LOCAL; | |
112cace6 | 894 | |
30926600 N |
895 | mdfd = create_mddev(match ? match->devname : NULL, |
896 | ra->name, | |
897 | autof, | |
898 | trustworthy, | |
899 | chosen_name); | |
900 | } | |
598f0d58 NB |
901 | |
902 | if (mdfd < 0) { | |
903 | fprintf(stderr, Name ": failed to open %s: %s.\n", | |
904 | chosen_name, strerror(errno)); | |
905 | return 2; | |
906 | } | |
907 | ||
03b7f6c6 N |
908 | assemble_container_content(st, mdfd, ra, runstop, |
909 | chosen_name, verbose); | |
598f0d58 | 910 | } |
ad5bc697 | 911 | map_unlock(&map); |
598f0d58 NB |
912 | return 0; |
913 | } | |
29ba4804 N |
914 | |
915 | /* | |
916 | * IncrementalRemove - Attempt to see if the passed in device belongs to any | |
917 | * raid arrays, and if so first fail (if needed) and then remove the device. | |
918 | * | |
919 | * @devname - The device we want to remove | |
920 | * | |
921 | * Note: the device name must be a kernel name like "sda", so | |
922 | * that we can find it in /proc/mdstat | |
923 | */ | |
924 | int IncrementalRemove(char *devname, int verbose) | |
925 | { | |
926 | int mdfd; | |
aae3cdc3 | 927 | int rv; |
29ba4804 N |
928 | struct mdstat_ent *ent; |
929 | struct mddev_dev_s devlist; | |
930 | ||
931 | if (strchr(devname, '/')) { | |
932 | fprintf(stderr, Name ": incremental removal requires a " | |
933 | "kernel device name, not a file: %s\n", devname); | |
934 | return 1; | |
935 | } | |
936 | ent = mdstat_by_component(devname); | |
937 | if (!ent) { | |
938 | fprintf(stderr, Name ": %s does not appear to be a component " | |
939 | "of any array\n", devname); | |
940 | return 1; | |
941 | } | |
942 | mdfd = open_dev(ent->devnum); | |
943 | if (mdfd < 0) { | |
944 | fprintf(stderr, Name ": Cannot open array %s!!\n", ent->dev); | |
945 | return 1; | |
946 | } | |
947 | memset(&devlist, 0, sizeof(devlist)); | |
948 | devlist.devname = devname; | |
949 | devlist.disposition = 'f'; | |
7d2e6486 | 950 | Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0); |
29ba4804 | 951 | devlist.disposition = 'r'; |
aae3cdc3 PC |
952 | rv = Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0); |
953 | close(mdfd); | |
954 | return rv; | |
29ba4804 | 955 | } |