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Commit | Line | Data |
---|---|---|
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" | |
61018da0 N |
32 | #include <dirent.h> |
33 | #include <ctype.h> | |
8382f19b NB |
34 | |
35 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
36 | struct mdinfo *info); | |
7e0f6979 | 37 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, |
8382f19b NB |
38 | int number, __u64 events, int verbose, |
39 | char *array_name); | |
f08605b3 N |
40 | static int try_spare(char *devname, int *dfdp, struct dev_policy *pol, |
41 | struct supertype *st, int verbose); | |
8382f19b | 42 | |
7d91c3f5 N |
43 | static int Incremental_container(struct supertype *st, char *devname, |
44 | int verbose, int runstop, int autof, | |
45 | int trustworthy); | |
46 | ||
3a97f210 N |
47 | static struct mddev_ident_s *search_mdstat(struct supertype *st, |
48 | struct mdinfo *info, | |
49 | char *devname, | |
50 | int verbose, int *rvp); | |
51 | ||
8382f19b | 52 | int Incremental(char *devname, int verbose, int runstop, |
0ac91628 N |
53 | struct supertype *st, char *homehost, int require_homehost, |
54 | int autof) | |
8382f19b NB |
55 | { |
56 | /* Add this device to an array, creating the array if necessary | |
598f0d58 | 57 | * and starting the array if sensible or - if runstop>0 - if possible. |
8382f19b NB |
58 | * |
59 | * This has several steps: | |
60 | * | |
61 | * 1/ Check if device is permitted by mdadm.conf, reject if not. | |
62 | * 2/ Find metadata, reject if none appropriate (check | |
63 | * version/name from args) | |
64 | * 3/ Check if there is a match in mdadm.conf | |
215bb3f7 N |
65 | * 3a/ if not, check for homehost match. If no match, assemble as |
66 | * a 'foreign' array. | |
8382f19b NB |
67 | * 4/ Determine device number. |
68 | * - If in mdadm.conf with std name, use that | |
69 | * - UUID in /var/run/mdadm.map use that | |
70 | * - If name is suggestive, use that. unless in use with different uuid. | |
71 | * - Choose a free, high number. | |
72 | * - Use a partitioned device unless strong suggestion not to. | |
73 | * e.g. auto=md | |
352452c3 | 74 | * Don't choose partitioned for containers. |
8382f19b NB |
75 | * 5/ Find out if array already exists |
76 | * 5a/ if it does not | |
77 | * - choose a name, from mdadm.conf or 'name' field in array. | |
78 | * - create the array | |
79 | * - add the device | |
80 | * 5b/ if it does | |
81 | * - check one drive in array to make sure metadata is a reasonably | |
82 | * close match. Reject if not (e.g. different type) | |
83 | * - add the device | |
84 | * 6/ Make sure /var/run/mdadm.map contains this array. | |
85 | * 7/ Is there enough devices to possibly start the array? | |
352452c3 | 86 | * For a container, this means running Incremental_container. |
8382f19b NB |
87 | * 7a/ if not, finish with success. |
88 | * 7b/ if yes, | |
89 | * - read all metadata and arrange devices like -A does | |
90 | * - if number of OK devices match expected, or -R and there are enough, | |
91 | * start the array (auto-readonly). | |
92 | */ | |
93 | struct stat stb; | |
7e83544b | 94 | struct mdinfo info, dinfo; |
3a97f210 | 95 | struct mddev_ident_s *match; |
8382f19b | 96 | char chosen_name[1024]; |
15d4a7e4 | 97 | int rv = 1; |
8382f19b | 98 | struct map_ent *mp, *map = NULL; |
15d4a7e4 | 99 | int dfd = -1, mdfd = -1; |
8382f19b NB |
100 | char *avail; |
101 | int active_disks; | |
215bb3f7 | 102 | int trustworthy = FOREIGN; |
d7288ddc | 103 | char *name_to_use; |
ad5bc697 | 104 | mdu_array_info_t ainf; |
7e83544b | 105 | struct dev_policy *policy = NULL; |
8382f19b NB |
106 | |
107 | struct createinfo *ci = conf_get_create_info(); | |
108 | ||
8382f19b | 109 | |
352452c3 | 110 | /* 1/ Check if device is permitted by mdadm.conf */ |
8382f19b NB |
111 | |
112 | if (!conf_test_dev(devname)) { | |
113 | if (verbose >= 0) | |
114 | fprintf(stderr, Name | |
115 | ": %s not permitted by mdadm.conf.\n", | |
116 | devname); | |
15d4a7e4 | 117 | goto out; |
8382f19b NB |
118 | } |
119 | ||
120 | /* 2/ Find metadata, reject if none appropriate (check | |
121 | * version/name from args) */ | |
122 | ||
123 | dfd = dev_open(devname, O_RDONLY|O_EXCL); | |
124 | if (dfd < 0) { | |
125 | if (verbose >= 0) | |
126 | fprintf(stderr, Name ": cannot open %s: %s.\n", | |
127 | devname, strerror(errno)); | |
15d4a7e4 | 128 | goto out; |
8382f19b NB |
129 | } |
130 | if (fstat(dfd, &stb) < 0) { | |
131 | if (verbose >= 0) | |
132 | fprintf(stderr, Name ": fstat failed for %s: %s.\n", | |
133 | devname, strerror(errno)); | |
15d4a7e4 | 134 | goto out; |
8382f19b NB |
135 | } |
136 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
137 | if (verbose >= 0) | |
138 | fprintf(stderr, Name ": %s is not a block device.\n", | |
139 | devname); | |
15d4a7e4 | 140 | goto out; |
8382f19b NB |
141 | } |
142 | ||
7e83544b N |
143 | dinfo.disk.major = major(stb.st_rdev); |
144 | dinfo.disk.minor = minor(stb.st_rdev); | |
145 | ||
146 | policy = disk_policy(&dinfo); | |
147 | ||
8382f19b NB |
148 | if (st == NULL && (st = guess_super(dfd)) == NULL) { |
149 | if (verbose >= 0) | |
150 | fprintf(stderr, Name | |
151 | ": no recognisable superblock on %s.\n", | |
152 | devname); | |
f08605b3 | 153 | rv = try_spare(devname, &dfd, policy, st, verbose); |
15d4a7e4 | 154 | goto out; |
8382f19b | 155 | } |
0f22b998 N |
156 | if (st->ss->compare_super == NULL || |
157 | st->ss->load_super(st, dfd, NULL)) { | |
8382f19b NB |
158 | if (verbose >= 0) |
159 | fprintf(stderr, Name ": no RAID superblock on %s.\n", | |
160 | devname); | |
f08605b3 | 161 | rv = try_spare(devname, &dfd, policy, st, verbose); |
0f22b998 | 162 | free(st); |
15d4a7e4 | 163 | goto out; |
8382f19b | 164 | } |
15d4a7e4 | 165 | close (dfd); dfd = -1; |
8382f19b | 166 | |
f35f2525 | 167 | memset(&info, 0, sizeof(info)); |
a5d85af7 | 168 | st->ss->getinfo_super(st, &info, NULL); |
8382f19b | 169 | |
3a97f210 N |
170 | /* 3/ Check if there is a match in mdadm.conf */ |
171 | match = search_mdstat(st, &info, devname, verbose, &rv); | |
172 | if (!match && rv == 2) | |
173 | goto out; | |
8382f19b | 174 | |
112cace6 N |
175 | if (match && match->devname |
176 | && strcasecmp(match->devname, "<ignore>") == 0) { | |
177 | if (verbose >= 0) | |
178 | fprintf(stderr, Name ": array containing %s is explicitly" | |
179 | " ignored by mdadm.conf\n", | |
180 | devname); | |
15d4a7e4 | 181 | goto out; |
112cace6 N |
182 | } |
183 | ||
7b403fef N |
184 | /* 3a/ if not, check for homehost match. If no match, continue |
185 | * but don't trust the 'name' in the array. Thus a 'random' minor | |
186 | * number will be assigned, and the device name will be based | |
187 | * on that. */ | |
215bb3f7 N |
188 | if (match) |
189 | trustworthy = LOCAL; | |
d1d3482b N |
190 | else if (st->ss->match_home(st, homehost) == 1) |
191 | trustworthy = LOCAL; | |
192 | else if (st->ss->match_home(st, "any") == 1) | |
193 | trustworthy = LOCAL_ANY; | |
215bb3f7 | 194 | else |
d1d3482b N |
195 | trustworthy = FOREIGN; |
196 | ||
197 | ||
4e8d9f0a | 198 | if (!match && !conf_test_metadata(st->ss->name, policy, |
d1d3482b N |
199 | (trustworthy == LOCAL))) { |
200 | if (verbose >= 1) | |
201 | fprintf(stderr, Name | |
202 | ": %s has metadata type %s for which " | |
203 | "auto-assembly is disabled\n", | |
204 | devname, st->ss->name); | |
15d4a7e4 | 205 | goto out; |
d1d3482b N |
206 | } |
207 | if (trustworthy == LOCAL_ANY) | |
ecb02e31 | 208 | trustworthy = LOCAL; |
e12e1d1d | 209 | |
4ef2f11e N |
210 | /* There are three possible sources for 'autof': command line, |
211 | * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf. | |
350ac35d N |
212 | * ARRAY takes precedence, then command line, then |
213 | * CREATE. | |
4ef2f11e | 214 | */ |
350ac35d | 215 | if (match && match->autof) |
4ef2f11e N |
216 | autof = match->autof; |
217 | if (autof == 0) | |
218 | autof = ci->autof; | |
219 | ||
215bb3f7 | 220 | if (st->ss->container_content && st->loaded_container) { |
97b4d0e9 DW |
221 | if ((runstop > 0 && info.container_enough >= 0) || |
222 | info.container_enough > 0) | |
223 | /* pass */; | |
224 | else { | |
225 | if (verbose) | |
226 | fprintf(stderr, Name ": not enough devices to start the container\n"); | |
15d4a7e4 N |
227 | rv = 0; |
228 | goto out; | |
97b4d0e9 DW |
229 | } |
230 | ||
215bb3f7 N |
231 | /* This is a pre-built container array, so we do something |
232 | * rather different. | |
233 | */ | |
15d4a7e4 | 234 | rv = Incremental_container(st, devname, verbose, runstop, |
215bb3f7 | 235 | autof, trustworthy); |
15d4a7e4 | 236 | goto out; |
8382f19b | 237 | } |
ecb02e31 | 238 | |
7cdc0872 | 239 | name_to_use = info.name; |
0ac91628 | 240 | if (name_to_use[0] == 0 && |
ecb02e31 N |
241 | info.array.level == LEVEL_CONTAINER && |
242 | trustworthy == LOCAL) { | |
243 | name_to_use = info.text_version; | |
244 | trustworthy = METADATA; | |
245 | } | |
0ac91628 N |
246 | if (name_to_use[0] && trustworthy != LOCAL && |
247 | ! require_homehost && | |
248 | conf_name_is_free(name_to_use)) | |
249 | trustworthy = LOCAL; | |
ecb02e31 | 250 | |
7cdc0872 N |
251 | /* strip "hostname:" prefix from name if we have decided |
252 | * to treat it as LOCAL | |
253 | */ | |
254 | if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL) | |
255 | name_to_use = strchr(name_to_use, ':')+1; | |
256 | ||
ad5bc697 | 257 | /* 4/ Check if array exists. |
215bb3f7 | 258 | */ |
93c861ee DL |
259 | if (map_lock(&map)) |
260 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
261 | "mapfile\n"); | |
215bb3f7 | 262 | mp = map_by_uuid(&map, info.uuid); |
339c2d6c N |
263 | if (mp) |
264 | mdfd = open_dev(mp->devnum); | |
265 | else | |
215bb3f7 | 266 | mdfd = -1; |
d7288ddc | 267 | |
8382f19b | 268 | if (mdfd < 0) { |
7e0f6979 | 269 | struct mdinfo *sra; |
8382f19b | 270 | |
215bb3f7 | 271 | /* Couldn't find an existing array, maybe make a new one */ |
ffb3e494 | 272 | mdfd = create_mddev(match ? match->devname : NULL, |
e12e1d1d | 273 | name_to_use, autof, trustworthy, chosen_name); |
215bb3f7 N |
274 | |
275 | if (mdfd < 0) | |
15d4a7e4 | 276 | goto out; |
215bb3f7 N |
277 | |
278 | sysfs_init(&info, mdfd, 0); | |
279 | ||
f35f2525 N |
280 | if (set_array_info(mdfd, st, &info) != 0) { |
281 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", | |
8382f19b | 282 | chosen_name, strerror(errno)); |
15d4a7e4 N |
283 | rv = 2; |
284 | goto out; | |
8382f19b | 285 | } |
7801ac20 | 286 | |
c5afc314 N |
287 | dinfo = info; |
288 | dinfo.disk.major = major(stb.st_rdev); | |
289 | dinfo.disk.minor = minor(stb.st_rdev); | |
290 | if (add_disk(mdfd, st, &info, &dinfo) != 0) { | |
8382f19b NB |
291 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", |
292 | devname, chosen_name, strerror(errno)); | |
293 | ioctl(mdfd, STOP_ARRAY, 0); | |
15d4a7e4 N |
294 | rv = 2; |
295 | goto out; | |
8382f19b | 296 | } |
197e3eb6 | 297 | sra = sysfs_read(mdfd, fd2devnum(mdfd), GET_DEVS); |
06c7f68e | 298 | if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) { |
8382f19b NB |
299 | /* It really should be 'none' - must be old buggy |
300 | * kernel, and mdadm -I may not be able to complete. | |
301 | * So reject it. | |
302 | */ | |
303 | ioctl(mdfd, STOP_ARRAY, NULL); | |
304 | fprintf(stderr, Name | |
305 | ": You have an old buggy kernel which cannot support\n" | |
306 | " --incremental reliably. Aborting.\n"); | |
8382f19b | 307 | sysfs_free(sra); |
15d4a7e4 N |
308 | rv = 2; |
309 | goto out; | |
8382f19b | 310 | } |
c5afc314 | 311 | info.array.working_disks = 1; |
f35f2525 | 312 | sysfs_free(sra); |
ad5bc697 N |
313 | /* 6/ Make sure /var/run/mdadm.map contains this array. */ |
314 | map_update(&map, fd2devnum(mdfd), | |
315 | info.text_version, | |
316 | info.uuid, chosen_name); | |
8382f19b NB |
317 | } else { |
318 | /* 5b/ if it does */ | |
319 | /* - check one drive in array to make sure metadata is a reasonably */ | |
320 | /* close match. Reject if not (e.g. different type) */ | |
321 | /* - add the device */ | |
322 | char dn[20]; | |
323 | int dfd2; | |
8382f19b | 324 | int err; |
7e0f6979 | 325 | struct mdinfo *sra; |
3da92f27 | 326 | struct supertype *st2; |
c5afc314 | 327 | struct mdinfo info2, *d; |
215bb3f7 | 328 | |
339c2d6c N |
329 | if (mp->path) |
330 | strcpy(chosen_name, mp->path); | |
331 | else | |
332 | strcpy(chosen_name, devnum2devname(mp->devnum)); | |
215bb3f7 | 333 | |
ef83fe7c N |
334 | /* It is generally not OK to add non-spare drives to a |
335 | * running array as they are probably missing because | |
336 | * they failed. However if runstop is 1, then the | |
7e83544b N |
337 | * array was possibly started early and our best bet is |
338 | * to add this anyway. | |
339 | * Also if action policy is re-add or better we allow | |
340 | * re-add | |
3a6ec29a | 341 | */ |
ef83fe7c | 342 | if ((info.disk.state & (1<<MD_DISK_SYNC)) != 0 |
7e83544b N |
343 | && ! policy_action_allows(policy, st->ss->name, |
344 | act_re_add) | |
ef83fe7c | 345 | && runstop < 1) { |
1dccfff9 DW |
346 | int active = 0; |
347 | ||
348 | if (st->ss->external) { | |
349 | char *devname = devnum2devname(fd2devnum(mdfd)); | |
350 | ||
351 | active = devname && is_container_active(devname); | |
352 | free(devname); | |
353 | } else if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) | |
354 | active = 1; | |
355 | if (active) { | |
3a6ec29a N |
356 | fprintf(stderr, Name |
357 | ": not adding %s to active array (without --run) %s\n", | |
358 | devname, chosen_name); | |
15d4a7e4 N |
359 | rv = 2; |
360 | goto out; | |
3a6ec29a N |
361 | } |
362 | } | |
197e3eb6 | 363 | sra = sysfs_read(mdfd, fd2devnum(mdfd), (GET_DEVS | GET_STATE)); |
15d4a7e4 N |
364 | if (!sra) { |
365 | rv = 2; | |
366 | goto out; | |
367 | } | |
7c548327 N |
368 | if (sra->devs) { |
369 | sprintf(dn, "%d:%d", sra->devs->disk.major, | |
370 | sra->devs->disk.minor); | |
371 | dfd2 = dev_open(dn, O_RDONLY); | |
372 | st2 = dup_super(st); | |
373 | if (st2->ss->load_super(st2, dfd2, NULL) || | |
374 | st->ss->compare_super(st, st2) != 0) { | |
375 | fprintf(stderr, Name | |
376 | ": metadata mismatch between %s and " | |
377 | "chosen array %s\n", | |
378 | devname, chosen_name); | |
7c548327 | 379 | close(dfd2); |
15d4a7e4 N |
380 | rv = 2; |
381 | goto out; | |
7c548327 | 382 | } |
8382f19b | 383 | close(dfd2); |
7c548327 | 384 | memset(&info2, 0, sizeof(info2)); |
a5d85af7 | 385 | st2->ss->getinfo_super(st2, &info2, NULL); |
7c548327 N |
386 | st2->ss->free_super(st2); |
387 | if (info.array.level != info2.array.level || | |
388 | memcmp(info.uuid, info2.uuid, 16) != 0 || | |
389 | info.array.raid_disks != info2.array.raid_disks) { | |
390 | fprintf(stderr, Name | |
391 | ": unexpected difference between %s and %s.\n", | |
392 | chosen_name, devname); | |
15d4a7e4 N |
393 | rv = 2; |
394 | goto out; | |
7c548327 | 395 | } |
8382f19b | 396 | } |
7801ac20 N |
397 | info2.disk.major = major(stb.st_rdev); |
398 | info2.disk.minor = minor(stb.st_rdev); | |
c5afc314 N |
399 | /* add disk needs to know about containers */ |
400 | if (st->ss->external) | |
401 | sra->array.level = LEVEL_CONTAINER; | |
ac7de9d9 | 402 | err = add_disk(mdfd, st, sra, &info2); |
8382f19b NB |
403 | if (err < 0 && errno == EBUSY) { |
404 | /* could be another device present with the same | |
405 | * disk.number. Find and reject any such | |
406 | */ | |
407 | find_reject(mdfd, st, sra, info.disk.number, | |
408 | info.events, verbose, chosen_name); | |
ac7de9d9 | 409 | err = add_disk(mdfd, st, sra, &info2); |
8382f19b NB |
410 | } |
411 | if (err < 0) { | |
412 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", | |
413 | devname, chosen_name, strerror(errno)); | |
15d4a7e4 N |
414 | rv = 2; |
415 | goto out; | |
8382f19b | 416 | } |
c5afc314 N |
417 | info.array.working_disks = 0; |
418 | for (d = sra->devs; d; d=d->next) | |
419 | info.array.working_disks ++; | |
420 | ||
8382f19b | 421 | } |
8382f19b NB |
422 | |
423 | /* 7/ Is there enough devices to possibly start the array? */ | |
424 | /* 7a/ if not, finish with success. */ | |
352452c3 N |
425 | if (info.array.level == LEVEL_CONTAINER) { |
426 | /* Try to assemble within the container */ | |
ad5bc697 | 427 | map_unlock(&map); |
97590376 | 428 | sysfs_uevent(&info, "change"); |
c5afc314 N |
429 | if (verbose >= 0) |
430 | fprintf(stderr, Name | |
431 | ": container %s now has %d devices\n", | |
432 | chosen_name, info.array.working_disks); | |
a7c6e3fb N |
433 | wait_for(chosen_name, mdfd); |
434 | close(mdfd); | |
03b7f6c6 | 435 | rv = Incremental(chosen_name, verbose, runstop, |
0ac91628 | 436 | NULL, homehost, require_homehost, autof); |
03b7f6c6 N |
437 | if (rv == 1) |
438 | /* Don't fail the whole -I if a subarray didn't | |
439 | * have enough devices to start yet | |
440 | */ | |
441 | rv = 0; | |
442 | return rv; | |
352452c3 | 443 | } |
f8409e54 | 444 | avail = NULL; |
8382f19b NB |
445 | active_disks = count_active(st, mdfd, &avail, &info); |
446 | if (enough(info.array.level, info.array.raid_disks, | |
447 | info.array.layout, info.array.state & 1, | |
3288b419 | 448 | avail, active_disks) == 0) { |
8382f19b NB |
449 | free(avail); |
450 | if (verbose >= 0) | |
451 | fprintf(stderr, Name | |
452 | ": %s attached to %s, not enough to start (%d).\n", | |
453 | devname, chosen_name, active_disks); | |
ad5bc697 | 454 | map_unlock(&map); |
15d4a7e4 N |
455 | rv = 0; |
456 | goto out; | |
8382f19b NB |
457 | } |
458 | free(avail); | |
459 | ||
460 | /* 7b/ if yes, */ | |
461 | /* - if number of OK devices match expected, or -R and there */ | |
462 | /* are enough, */ | |
463 | /* + add any bitmap file */ | |
464 | /* + start the array (auto-readonly). */ | |
8382f19b NB |
465 | |
466 | if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) { | |
467 | if (verbose >= 0) | |
468 | fprintf(stderr, Name | |
469 | ": %s attached to %s which is already active.\n", | |
470 | devname, chosen_name); | |
ad5bc697 | 471 | map_unlock(&map); |
15d4a7e4 N |
472 | rv = 0; |
473 | goto out; | |
8382f19b | 474 | } |
ad5bc697 N |
475 | |
476 | map_unlock(&map); | |
8382f19b | 477 | if (runstop > 0 || active_disks >= info.array.working_disks) { |
7e83544b | 478 | struct mdinfo *sra, *dsk; |
8382f19b NB |
479 | /* Let's try to start it */ |
480 | if (match && match->bitmap_file) { | |
481 | int bmfd = open(match->bitmap_file, O_RDWR); | |
482 | if (bmfd < 0) { | |
483 | fprintf(stderr, Name | |
484 | ": Could not open bitmap file %s.\n", | |
485 | match->bitmap_file); | |
15d4a7e4 | 486 | goto out; |
8382f19b NB |
487 | } |
488 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
489 | close(bmfd); | |
490 | fprintf(stderr, Name | |
491 | ": Failed to set bitmapfile for %s.\n", | |
492 | chosen_name); | |
15d4a7e4 | 493 | goto out; |
8382f19b NB |
494 | } |
495 | close(bmfd); | |
496 | } | |
7e83544b N |
497 | /* GET_* needed so add_disk works below */ |
498 | sra = sysfs_read(mdfd, fd2devnum(mdfd), | |
499 | GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE); | |
7b403fef | 500 | if ((sra == NULL || active_disks >= info.array.working_disks) |
215bb3f7 | 501 | && trustworthy != FOREIGN) |
8382f19b NB |
502 | rv = ioctl(mdfd, RUN_ARRAY, NULL); |
503 | else | |
504 | rv = sysfs_set_str(sra, NULL, | |
505 | "array_state", "read-auto"); | |
506 | if (rv == 0) { | |
507 | if (verbose >= 0) | |
508 | fprintf(stderr, Name | |
7e83544b | 509 | ": %s attached to %s, which has been started.\n", |
8382f19b NB |
510 | devname, chosen_name); |
511 | rv = 0; | |
a7c6e3fb | 512 | wait_for(chosen_name, mdfd); |
7e83544b N |
513 | /* We just started the array, so some devices |
514 | * might have been evicted from the array | |
515 | * because their event counts were too old. | |
516 | * If the action=re-add policy is in-force for | |
517 | * those devices we should re-add them now. | |
518 | */ | |
519 | for (dsk = sra->devs; dsk ; dsk = dsk->next) { | |
520 | if (disk_action_allows(dsk, st->ss->name, act_re_add) && | |
521 | add_disk(mdfd, st, sra, dsk) == 0) | |
522 | fprintf(stderr, Name | |
523 | ": %s re-added to %s\n", | |
524 | dsk->sys_name, chosen_name); | |
525 | } | |
8382f19b NB |
526 | } else { |
527 | fprintf(stderr, Name | |
528 | ": %s attached to %s, but failed to start: %s.\n", | |
529 | devname, chosen_name, strerror(errno)); | |
530 | rv = 1; | |
531 | } | |
532 | } else { | |
533 | if (verbose >= 0) | |
534 | fprintf(stderr, Name | |
535 | ": %s attached to %s, not enough to start safely.\n", | |
536 | devname, chosen_name); | |
537 | rv = 0; | |
538 | } | |
15d4a7e4 N |
539 | out: |
540 | if (dfd >= 0) | |
541 | close(dfd); | |
542 | if (mdfd >= 0) | |
543 | close(mdfd); | |
7e83544b N |
544 | if (policy) |
545 | dev_policy_free(policy); | |
8382f19b NB |
546 | return rv; |
547 | } | |
548 | ||
3a97f210 N |
549 | static struct mddev_ident_s *search_mdstat(struct supertype *st, |
550 | struct mdinfo *info, | |
551 | char *devname, | |
552 | int verbose, int *rvp) | |
553 | { | |
554 | struct mddev_ident_s *array_list, *match; | |
555 | array_list = conf_get_ident(NULL); | |
556 | match = NULL; | |
557 | for (; array_list; array_list = array_list->next) { | |
558 | if (array_list->uuid_set && | |
559 | same_uuid(array_list->uuid, info->uuid, st->ss->swapuuid) | |
560 | == 0) { | |
561 | if (verbose >= 2 && array_list->devname) | |
562 | fprintf(stderr, Name | |
563 | ": UUID differs from %s.\n", | |
564 | array_list->devname); | |
565 | continue; | |
566 | } | |
567 | if (array_list->name[0] && | |
568 | strcasecmp(array_list->name, info->name) != 0) { | |
569 | if (verbose >= 2 && array_list->devname) | |
570 | fprintf(stderr, Name | |
571 | ": Name differs from %s.\n", | |
572 | array_list->devname); | |
573 | continue; | |
574 | } | |
575 | if (array_list->devices && | |
576 | !match_oneof(array_list->devices, devname)) { | |
577 | if (verbose >= 2 && array_list->devname) | |
578 | fprintf(stderr, Name | |
579 | ": Not a listed device for %s.\n", | |
580 | array_list->devname); | |
581 | continue; | |
582 | } | |
583 | if (array_list->super_minor != UnSet && | |
584 | array_list->super_minor != info->array.md_minor) { | |
585 | if (verbose >= 2 && array_list->devname) | |
586 | fprintf(stderr, Name | |
587 | ": Different super-minor to %s.\n", | |
588 | array_list->devname); | |
589 | continue; | |
590 | } | |
591 | if (!array_list->uuid_set && | |
592 | !array_list->name[0] && | |
593 | !array_list->devices && | |
594 | array_list->super_minor == UnSet) { | |
595 | if (verbose >= 2 && array_list->devname) | |
596 | fprintf(stderr, Name | |
597 | ": %s doesn't have any identifying information.\n", | |
598 | array_list->devname); | |
599 | continue; | |
600 | } | |
601 | /* FIXME, should I check raid_disks and level too?? */ | |
602 | ||
603 | if (match) { | |
604 | if (verbose >= 0) { | |
605 | if (match->devname && array_list->devname) | |
606 | fprintf(stderr, Name | |
607 | ": we match both %s and %s - cannot decide which to use.\n", | |
608 | match->devname, array_list->devname); | |
609 | else | |
610 | fprintf(stderr, Name | |
611 | ": multiple lines in mdadm.conf match\n"); | |
612 | } | |
613 | *rvp = 2; | |
614 | match = NULL; | |
615 | break; | |
616 | } | |
617 | match = array_list; | |
618 | } | |
619 | return match; | |
620 | } | |
621 | ||
7e0f6979 | 622 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, |
8382f19b NB |
623 | int number, __u64 events, int verbose, |
624 | char *array_name) | |
625 | { | |
3da92f27 | 626 | /* Find a device attached to this array with a disk.number of number |
8382f19b NB |
627 | * and events less than the passed events, and remove the device. |
628 | */ | |
06c7f68e | 629 | struct mdinfo *d; |
8382f19b NB |
630 | mdu_array_info_t ra; |
631 | ||
632 | if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0) | |
633 | return; /* not safe to remove from active arrays | |
634 | * without thinking more */ | |
635 | ||
636 | for (d = sra->devs; d ; d = d->next) { | |
637 | char dn[10]; | |
638 | int dfd; | |
8382f19b | 639 | struct mdinfo info; |
06c7f68e | 640 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); |
8382f19b NB |
641 | dfd = dev_open(dn, O_RDONLY); |
642 | if (dfd < 0) | |
643 | continue; | |
3da92f27 | 644 | if (st->ss->load_super(st, dfd, NULL)) { |
8382f19b NB |
645 | close(dfd); |
646 | continue; | |
647 | } | |
a5d85af7 | 648 | st->ss->getinfo_super(st, &info, NULL); |
3da92f27 | 649 | st->ss->free_super(st); |
8382f19b NB |
650 | close(dfd); |
651 | ||
652 | if (info.disk.number != number || | |
653 | info.events >= events) | |
654 | continue; | |
655 | ||
06c7f68e | 656 | if (d->disk.raid_disk > -1) |
8382f19b NB |
657 | sysfs_set_str(sra, d, "slot", "none"); |
658 | if (sysfs_set_str(sra, d, "state", "remove") == 0) | |
659 | if (verbose >= 0) | |
660 | fprintf(stderr, Name | |
661 | ": removing old device %s from %s\n", | |
06c7f68e | 662 | d->sys_name+4, array_name); |
8382f19b NB |
663 | } |
664 | } | |
665 | ||
666 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
667 | struct mdinfo *bestinfo) | |
668 | { | |
669 | /* count how many devices in sra think they are active */ | |
06c7f68e | 670 | struct mdinfo *d; |
8382f19b NB |
671 | int cnt = 0, cnt1 = 0; |
672 | __u64 max_events = 0; | |
7e0f6979 | 673 | struct mdinfo *sra = sysfs_read(mdfd, -1, GET_DEVS | GET_STATE); |
8382f19b NB |
674 | char *avail = NULL; |
675 | ||
b526e52d DW |
676 | if (!sra) |
677 | return 0; | |
678 | ||
8382f19b NB |
679 | for (d = sra->devs ; d ; d = d->next) { |
680 | char dn[30]; | |
681 | int dfd; | |
8382f19b NB |
682 | int ok; |
683 | struct mdinfo info; | |
684 | ||
06c7f68e | 685 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); |
8382f19b NB |
686 | dfd = dev_open(dn, O_RDONLY); |
687 | if (dfd < 0) | |
688 | continue; | |
3da92f27 | 689 | ok = st->ss->load_super(st, dfd, NULL); |
8382f19b NB |
690 | close(dfd); |
691 | if (ok != 0) | |
692 | continue; | |
a5d85af7 | 693 | st->ss->getinfo_super(st, &info, NULL); |
43aaf431 DL |
694 | if (!avail) { |
695 | avail = malloc(info.array.raid_disks); | |
696 | if (!avail) { | |
697 | fprintf(stderr, Name ": out of memory.\n"); | |
698 | exit(1); | |
699 | } | |
700 | memset(avail, 0, info.array.raid_disks); | |
701 | *availp = avail; | |
702 | } | |
703 | ||
8382f19b NB |
704 | if (info.disk.state & (1<<MD_DISK_SYNC)) |
705 | { | |
8382f19b NB |
706 | if (cnt == 0) { |
707 | cnt++; | |
708 | max_events = info.events; | |
709 | avail[info.disk.raid_disk] = 2; | |
a5d85af7 | 710 | st->ss->getinfo_super(st, bestinfo, NULL); |
8382f19b NB |
711 | } else if (info.events == max_events) { |
712 | cnt++; | |
713 | avail[info.disk.raid_disk] = 2; | |
714 | } else if (info.events == max_events-1) { | |
715 | cnt1++; | |
716 | avail[info.disk.raid_disk] = 1; | |
717 | } else if (info.events < max_events - 1) | |
718 | ; | |
719 | else if (info.events == max_events+1) { | |
720 | int i; | |
721 | cnt1 = cnt; | |
722 | cnt = 1; | |
723 | max_events = info.events; | |
724 | for (i=0; i<info.array.raid_disks; i++) | |
725 | if (avail[i]) | |
726 | avail[i]--; | |
727 | avail[info.disk.raid_disk] = 2; | |
a5d85af7 | 728 | st->ss->getinfo_super(st, bestinfo, NULL); |
8382f19b NB |
729 | } else { /* info.events much bigger */ |
730 | cnt = 1; cnt1 = 0; | |
731 | memset(avail, 0, info.disk.raid_disk); | |
732 | max_events = info.events; | |
1d1a9f87 | 733 | avail[info.disk.raid_disk] = 2; |
a5d85af7 | 734 | st->ss->getinfo_super(st, bestinfo, NULL); |
8382f19b NB |
735 | } |
736 | } | |
3da92f27 | 737 | st->ss->free_super(st); |
8382f19b NB |
738 | } |
739 | return cnt + cnt1; | |
740 | } | |
741 | ||
56e8be85 N |
742 | static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol, |
743 | struct supertype *st, int verbose) | |
f08605b3 N |
744 | { |
745 | /* This device doesn't have any md metadata | |
746 | * If it is 'bare' and theh device policy allows 'spare' look for | |
747 | * an array or container to attach it to. | |
748 | * If st is set, then only arrays of that type are considered | |
749 | * Return 0 on success, or some exit code on failure, probably 1. | |
750 | */ | |
751 | int rv = -1; | |
f08605b3 N |
752 | struct stat stb; |
753 | struct map_ent *mp, *map = NULL; | |
754 | struct mdinfo *chosen = NULL; | |
755 | int dfd = *dfdp; | |
756 | ||
f08605b3 N |
757 | if (fstat(dfd, &stb) != 0) |
758 | return 1; | |
f08605b3 | 759 | |
56e8be85 | 760 | /* |
f08605b3 N |
761 | * Now we need to find a suitable array to add this to. |
762 | * We only accept arrays that: | |
763 | * - match 'st' | |
764 | * - are in the same domains as the device | |
765 | * - are of an size for which the device will be useful | |
766 | * and we choose the one that is the most degraded | |
767 | */ | |
768 | ||
769 | if (map_lock(&map)) { | |
770 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
771 | "mapfile\n"); | |
772 | return 1; | |
773 | } | |
774 | for (mp = map ; mp ; mp = mp->next) { | |
775 | struct supertype *st2; | |
776 | struct domainlist *dl = NULL; | |
777 | struct mdinfo *sra; | |
778 | unsigned long long devsize; | |
779 | ||
780 | if (is_subarray(mp->metadata)) | |
781 | continue; | |
782 | if (st) { | |
783 | st2 = st->ss->match_metadata_desc(mp->metadata); | |
784 | if (!st2 || | |
785 | (st->minor_version >= 0 && | |
786 | st->minor_version != st2->minor_version)) { | |
787 | if (verbose > 1) | |
788 | fprintf(stderr, Name ": not adding %s to %s as metadata type doesn't match\n", | |
789 | devname, mp->path); | |
790 | free(st2); | |
791 | continue; | |
792 | } | |
793 | free(st2); | |
794 | } | |
795 | sra = sysfs_read(-1, mp->devnum, | |
796 | GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE| | |
797 | GET_DEGRADED|GET_COMPONENT|GET_VERSION); | |
798 | if (!sra) { | |
799 | /* Probably a container - no degraded info */ | |
800 | sra = sysfs_read(-1, mp->devnum, | |
801 | GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE| | |
802 | GET_COMPONENT|GET_VERSION); | |
803 | if (sra) | |
804 | sra->array.failed_disks = 0; | |
805 | } | |
806 | if (!sra) | |
807 | continue; | |
808 | if (st == NULL) { | |
809 | int i; | |
810 | st2 = NULL; | |
811 | for(i=0; !st2 && superlist[i]; i++) | |
812 | st2 = superlist[i]->match_metadata_desc( | |
813 | sra->text_version); | |
814 | } else | |
815 | st2 = st; | |
816 | get_dev_size(dfd, NULL, &devsize); | |
817 | if (st2->ss->avail_size(st2, devsize) < sra->component_size) { | |
818 | if (verbose > 1) | |
819 | fprintf(stderr, Name ": not adding %s to %s as it is too small\n", | |
820 | devname, mp->path); | |
821 | goto next; | |
822 | } | |
823 | dl = domain_from_array(sra, st2->ss->name); | |
824 | if (!domain_test(dl, pol, st2->ss->name)) { | |
825 | /* domain test fails */ | |
826 | if (verbose > 1) | |
827 | fprintf(stderr, Name ": not adding %s to %s as it is not in a compatible domain\n", | |
828 | devname, mp->path); | |
829 | ||
830 | goto next; | |
831 | } | |
832 | /* all tests passed, OK to add to this array */ | |
833 | if (!chosen) { | |
834 | chosen = sra; | |
835 | sra = NULL; | |
836 | } else if (chosen->array.failed_disks < sra->array.failed_disks) { | |
837 | sysfs_free(chosen); | |
838 | chosen = sra; | |
839 | sra = NULL; | |
840 | } | |
841 | next: | |
842 | if (sra) | |
843 | sysfs_free(sra); | |
844 | if (st != st2) | |
845 | free(st2); | |
846 | if (dl) | |
847 | domain_free(dl); | |
848 | } | |
849 | if (chosen) { | |
850 | /* add current device to chosen array as a spare */ | |
851 | int mdfd = open_dev(devname2devnum(chosen->sys_name)); | |
852 | if (mdfd >= 0) { | |
853 | struct mddev_dev_s devlist; | |
854 | char devname[20]; | |
855 | devlist.next = NULL; | |
856 | devlist.used = 0; | |
857 | devlist.re_add = 0; | |
858 | devlist.writemostly = 0; | |
859 | devlist.devname = devname; | |
860 | sprintf(devname, "%d:%d", major(stb.st_rdev), | |
861 | minor(stb.st_rdev)); | |
862 | devlist.disposition = 'a'; | |
863 | close(dfd); | |
864 | *dfdp = -1; | |
865 | rv = Manage_subdevs(chosen->sys_name, mdfd, &devlist, | |
866 | -1, 0); | |
867 | close(mdfd); | |
868 | } | |
869 | if (verbose > 0) { | |
870 | if (rv == 0) | |
871 | fprintf(stderr, Name ": added %s as spare for %s\n", | |
872 | devname, chosen->sys_name); | |
873 | else | |
874 | fprintf(stderr, Name ": failed to add %s as spare for %s\n", | |
875 | devname, chosen->sys_name); | |
876 | } | |
877 | sysfs_free(chosen); | |
878 | } | |
879 | return rv ? 0 : 1; | |
880 | } | |
881 | ||
56e8be85 N |
882 | static int partition_try_spare(char *devname, int *dfdp, struct dev_policy *pol, |
883 | struct supertype *st, int verbose) | |
884 | { | |
61018da0 N |
885 | /* we know that at least one partition virtual-metadata is |
886 | * allowed to incorporate spares like this device. We need to | |
887 | * find a suitable device to copy partition information from. | |
888 | * | |
889 | * Getting a list of all disk (not partition) devices is | |
890 | * slightly non-trivial. We could look at /sys/block, but | |
891 | * that is theoretically due to be removed. Maybe best to use | |
892 | * /dev/disk/by-path/?* and ignore names ending '-partNN' as | |
893 | * we depend on this directory of 'path' info. But that fails | |
894 | * to find loop devices and probably others. Maybe don't | |
895 | * worry about that, they aren't the real target. | |
896 | * | |
897 | * So: check things in /dev/disk/by-path to see if they are in | |
898 | * a compatible domain, then load the partition table and see | |
899 | * if it is OK for the new device, and choose the largest | |
900 | * partition table that fits. | |
901 | */ | |
902 | DIR *dir; | |
903 | struct dirent *de; | |
904 | char *chosen = NULL; | |
905 | unsigned long long chosen_size; | |
906 | struct supertype *chosen_st = NULL; | |
907 | int fd; | |
908 | ||
909 | dir = opendir("/dev/disk/by-path"); | |
910 | if (!dir) | |
911 | return 1; | |
912 | while ((de = readdir(dir)) != NULL) { | |
913 | char *ep; | |
914 | struct dev_policy *pol2 = NULL; | |
915 | struct domainlist *domlist = NULL; | |
916 | int fd = -1; | |
917 | struct mdinfo info; | |
918 | struct supertype *st2 = NULL; | |
919 | char *devname = NULL; | |
920 | unsigned long long devsectors; | |
921 | ||
922 | if (de->d_ino == 0 || | |
923 | de->d_name[0] == '.' || | |
924 | (de->d_type != DT_LNK && de->d_type != DT_UNKNOWN)) | |
925 | goto next; | |
926 | ||
927 | ep = de->d_name + strlen(de->d_name); | |
928 | while (ep > de->d_name && | |
929 | isdigit(ep[-1])) | |
930 | ep--; | |
931 | if (ep > de->d_name + 5 && | |
932 | strncmp(ep-5, "-part", 5) == 0) | |
933 | /* This is a partition - skip it */ | |
934 | goto next; | |
935 | ||
936 | pol2 = path_policy(de->d_name, type_disk); | |
937 | ||
938 | domain_merge(&domlist, pol2, st ? st->ss->name : NULL); | |
939 | if (domain_test(domlist, pol, st ? st->ss->name : NULL) == 0) | |
940 | /* new device is incompatible with this device. */ | |
941 | goto next; | |
942 | ||
943 | domain_free(domlist); | |
944 | domlist = NULL; | |
945 | ||
946 | asprintf(&devname, "/dev/disk/by-path/%s", de->d_name); | |
947 | fd = open(devname, O_RDONLY); | |
948 | if (fd < 0) | |
949 | goto next; | |
950 | if (get_dev_size(fd, devname, &devsectors) == 0) | |
951 | goto next; | |
952 | devsectors >>= 9; | |
953 | ||
954 | if (st) | |
955 | st2 = dup_super(st); | |
956 | else | |
957 | st2 = guess_super_type(fd, guess_partitions); | |
958 | if (st2 == NULL || | |
959 | st2->ss->load_super(st2, fd, NULL) < 0) | |
960 | goto next; | |
961 | ||
962 | if (!st) { | |
963 | /* Check domain policy again, this time referring to metadata */ | |
964 | domain_merge(&domlist, pol2, st2->ss->name); | |
965 | if (domain_test(domlist, pol, st2->ss->name) == 0) | |
966 | /* Incompatible devices for this metadata type */ | |
967 | goto next; | |
968 | } | |
969 | ||
a5d85af7 | 970 | st2->ss->getinfo_super(st2, &info, NULL); |
61018da0 N |
971 | if (info.component_size > devsectors) |
972 | /* This partitioning doesn't fit in the device */ | |
973 | goto next; | |
974 | ||
975 | /* This is an acceptable device to copy partition | |
976 | * metadata from. We could just stop here, but I | |
977 | * think I want to keep looking incase a larger | |
978 | * metadata which makes better use of the device can | |
979 | * be found. | |
980 | */ | |
981 | if (chosen == NULL || | |
982 | chosen_size < info.component_size) { | |
983 | chosen_size = info.component_size; | |
984 | free(chosen); | |
985 | chosen = devname; | |
986 | devname = NULL; | |
987 | if (chosen_st) { | |
988 | chosen_st->ss->free_super(chosen_st); | |
989 | free(chosen_st); | |
990 | } | |
991 | chosen_st = st2; | |
992 | st2 = NULL; | |
993 | } | |
994 | ||
995 | next: | |
996 | free(devname); | |
997 | domain_free(domlist); | |
998 | dev_policy_free(pol2); | |
999 | if (st2) | |
1000 | st2->ss->free_super(st2); | |
1001 | free(st2); | |
1002 | ||
1003 | if (fd >= 0) | |
1004 | close(fd); | |
1005 | } | |
1006 | ||
1007 | if (!chosen) | |
1008 | return 1; | |
1009 | ||
1010 | /* 'chosen' is the best device we can find. Let's write its | |
1011 | * metadata to devname dfd is read-only so don't use that | |
1012 | */ | |
1013 | fd = open(devname, O_RDWR); | |
1014 | if (fd >= 0) { | |
1015 | chosen_st->ss->store_super(chosen_st, fd); | |
1016 | close(fd); | |
1017 | } | |
1018 | free(chosen); | |
1019 | chosen_st->ss->free_super(chosen_st); | |
1020 | free(chosen_st); | |
1021 | return 0; | |
56e8be85 N |
1022 | } |
1023 | ||
1024 | ||
1025 | /* adding a spare to a regular array is quite different from adding one to | |
1026 | * a set-of-partitions virtual array. | |
1027 | * This function determines which is worth trying and tries as appropriate. | |
1028 | * Arrays are given priority over partitions. | |
1029 | */ | |
1030 | static int try_spare(char *devname, int *dfdp, struct dev_policy *pol, | |
1031 | struct supertype *st, int verbose) | |
1032 | { | |
1033 | int i; | |
1034 | int rv; | |
1035 | int arrays_ok = 0; | |
1036 | int partitions_ok = 0; | |
1037 | char bufpad[4096 + 4096]; | |
1038 | char *buf = (char*)(((long)bufpad + 4096) & ~4095); | |
1039 | int dfd = *dfdp; | |
1040 | ||
1041 | /* Can only add a spare if device has at least one domains */ | |
1042 | if (pol_find(pol, pol_domain) == NULL) | |
1043 | return 1; | |
1044 | /* And only if some action allows spares */ | |
1045 | if (!policy_action_allows(pol, st?st->ss->name:NULL, act_spare)) | |
1046 | return 1; | |
1047 | ||
1048 | /* Now check if the device is bare - we don't add non-bare devices | |
1049 | * yet even if action=-spare | |
1050 | */ | |
1051 | ||
1052 | if (lseek(dfd, 0, SEEK_SET) != 0 || | |
1053 | read(dfd, buf, 4096) != 4096) { | |
1054 | not_bare: | |
1055 | if (verbose > 1) | |
1056 | fprintf(stderr, Name ": %s is not bare, so not considering as a spare\n", | |
1057 | devname); | |
1058 | return 1; | |
1059 | } | |
1060 | if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff') | |
1061 | goto not_bare; | |
1062 | if (memcmp(buf, buf+1, 4095) != 0) | |
1063 | goto not_bare; | |
1064 | ||
1065 | /* OK, first 4K appear blank, try the end. */ | |
1066 | if (lseek(dfd, -4096, SEEK_END) < 0 || | |
1067 | read(dfd, buf, 4096) != 4096) | |
1068 | goto not_bare; | |
1069 | ||
1070 | if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff') | |
1071 | goto not_bare; | |
1072 | if (memcmp(buf, buf+1, 4095) != 0) | |
1073 | goto not_bare; | |
1074 | ||
1075 | /* This device passes our test for 'is bare'. | |
1076 | * Let's see what policy allows for such things. | |
1077 | */ | |
1078 | if (st) { | |
1079 | /* just try try 'array' or 'partition' based on this metadata */ | |
1080 | if (st->ss->add_to_super) | |
1081 | return array_try_spare(devname, dfdp, pol, | |
1082 | st, verbose); | |
1083 | else | |
1084 | return partition_try_spare(devname, dfdp, pol, | |
1085 | st, verbose); | |
1086 | } | |
1087 | /* Now see which metadata type support spare */ | |
1088 | for (i = 0; (!arrays_ok || !partitions_ok) && superlist[i] ; i++) { | |
1089 | if (superlist[i]->add_to_super && !arrays_ok && | |
1090 | policy_action_allows(pol, superlist[i]->name, act_spare)) | |
1091 | arrays_ok = 1; | |
1092 | if (superlist[i]->add_to_super == NULL && !partitions_ok && | |
1093 | policy_action_allows(pol, superlist[i]->name, act_spare)) | |
1094 | partitions_ok = 1; | |
1095 | } | |
1096 | rv = 0; | |
1097 | if (arrays_ok) | |
1098 | rv = array_try_spare(devname, dfdp, pol, st, verbose); | |
1099 | if (rv == 0 && partitions_ok) | |
1100 | rv = partition_try_spare(devname, dfdp, pol, st, verbose); | |
1101 | return rv; | |
1102 | } | |
1103 | ||
8382f19b NB |
1104 | int IncrementalScan(int verbose) |
1105 | { | |
1106 | /* look at every device listed in the 'map' file. | |
1107 | * If one is found that is not running then: | |
1108 | * look in mdadm.conf for bitmap file. | |
1109 | * if one exists, but array has none, add it. | |
1110 | * try to start array in auto-readonly mode | |
1111 | */ | |
1112 | struct map_ent *mapl = NULL; | |
1113 | struct map_ent *me; | |
1114 | mddev_ident_t devs, mddev; | |
1115 | int rv = 0; | |
1116 | ||
1117 | map_read(&mapl); | |
1118 | devs = conf_get_ident(NULL); | |
1119 | ||
1120 | for (me = mapl ; me ; me = me->next) { | |
8382f19b NB |
1121 | mdu_array_info_t array; |
1122 | mdu_bitmap_file_t bmf; | |
7e0f6979 | 1123 | struct mdinfo *sra; |
339c2d6c | 1124 | int mdfd = open_dev(me->devnum); |
215bb3f7 | 1125 | |
8382f19b NB |
1126 | if (mdfd < 0) |
1127 | continue; | |
1128 | if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 || | |
1129 | errno != ENODEV) { | |
1130 | close(mdfd); | |
1131 | continue; | |
1132 | } | |
1133 | /* Ok, we can try this one. Maybe it needs a bitmap */ | |
1134 | for (mddev = devs ; mddev ; mddev = mddev->next) | |
339c2d6c | 1135 | if (mddev->devname && me->path |
2400e6eb | 1136 | && devname_matches(mddev->devname, me->path)) |
8382f19b NB |
1137 | break; |
1138 | if (mddev && mddev->bitmap_file) { | |
1139 | /* | |
1140 | * Note: early kernels will wrongly fail this, so it | |
1141 | * is a hint only | |
1142 | */ | |
1143 | int added = -1; | |
1144 | if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) { | |
1145 | int bmfd = open(mddev->bitmap_file, O_RDWR); | |
1146 | if (bmfd >= 0) { | |
1147 | added = ioctl(mdfd, SET_BITMAP_FILE, | |
1148 | bmfd); | |
1149 | close(bmfd); | |
1150 | } | |
1151 | } | |
1152 | if (verbose >= 0) { | |
1153 | if (added == 0) | |
1154 | fprintf(stderr, Name | |
1155 | ": Added bitmap %s to %s\n", | |
1156 | mddev->bitmap_file, me->path); | |
1157 | else if (errno != EEXIST) | |
1158 | fprintf(stderr, Name | |
1159 | ": Failed to add bitmap to %s: %s\n", | |
1160 | me->path, strerror(errno)); | |
1161 | } | |
1162 | } | |
1163 | sra = sysfs_read(mdfd, 0, 0); | |
1164 | if (sra) { | |
1165 | if (sysfs_set_str(sra, NULL, | |
1166 | "array_state", "read-auto") == 0) { | |
1167 | if (verbose >= 0) | |
1168 | fprintf(stderr, Name | |
1169 | ": started array %s\n", | |
339c2d6c | 1170 | me->path ?: devnum2devname(me->devnum)); |
8382f19b NB |
1171 | } else { |
1172 | fprintf(stderr, Name | |
1173 | ": failed to start array %s: %s\n", | |
339c2d6c N |
1174 | me->path ?: devnum2devname(me->devnum), |
1175 | strerror(errno)); | |
8382f19b NB |
1176 | rv = 1; |
1177 | } | |
1178 | } | |
1179 | } | |
1180 | return rv; | |
1181 | } | |
598f0d58 | 1182 | |
1771a6e2 N |
1183 | static char *container2devname(char *devname) |
1184 | { | |
1185 | char *mdname = NULL; | |
1186 | ||
1187 | if (devname[0] == '/') { | |
1188 | int fd = open(devname, O_RDONLY); | |
1189 | if (fd >= 0) { | |
1190 | mdname = devnum2devname(fd2devnum(fd)); | |
1191 | close(fd); | |
1192 | } | |
1193 | } else { | |
1194 | int uuid[4]; | |
1195 | struct map_ent *mp, *map = NULL; | |
1196 | ||
1197 | if (!parse_uuid(devname, uuid)) | |
1198 | return mdname; | |
1199 | mp = map_by_uuid(&map, uuid); | |
1200 | if (mp) | |
1201 | mdname = devnum2devname(mp->devnum); | |
1202 | map_free(map); | |
1203 | } | |
1204 | ||
1205 | return mdname; | |
1206 | } | |
1207 | ||
7d91c3f5 N |
1208 | static int Incremental_container(struct supertype *st, char *devname, int verbose, |
1209 | int runstop, int autof, int trustworthy) | |
598f0d58 NB |
1210 | { |
1211 | /* Collect the contents of this container and for each | |
1212 | * array, choose a device name and assemble the array. | |
1213 | */ | |
1214 | ||
00bbdbda | 1215 | struct mdinfo *list = st->ss->container_content(st, NULL); |
598f0d58 | 1216 | struct mdinfo *ra; |
ad5bc697 N |
1217 | struct map_ent *map = NULL; |
1218 | ||
93c861ee DL |
1219 | if (map_lock(&map)) |
1220 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
1221 | "mapfile\n"); | |
598f0d58 NB |
1222 | |
1223 | for (ra = list ; ra ; ra = ra->next) { | |
598f0d58 NB |
1224 | int mdfd; |
1225 | char chosen_name[1024]; | |
ad5bc697 | 1226 | struct map_ent *mp; |
dbb44303 | 1227 | struct mddev_ident_s *match = NULL; |
598f0d58 | 1228 | |
c5afc314 | 1229 | mp = map_by_uuid(&map, ra->uuid); |
d7288ddc | 1230 | |
30926600 N |
1231 | if (mp) { |
1232 | mdfd = open_dev(mp->devnum); | |
339c2d6c N |
1233 | if (mp->path) |
1234 | strcpy(chosen_name, mp->path); | |
1235 | else | |
1236 | strcpy(chosen_name, devnum2devname(mp->devnum)); | |
30926600 | 1237 | } else { |
dbb44303 | 1238 | |
112cace6 | 1239 | /* Check in mdadm.conf for container == devname and |
dbb44303 N |
1240 | * member == ra->text_version after second slash. |
1241 | */ | |
1242 | char *sub = strchr(ra->text_version+1, '/'); | |
1243 | struct mddev_ident_s *array_list; | |
1244 | if (sub) { | |
1245 | sub++; | |
1246 | array_list = conf_get_ident(NULL); | |
1247 | } else | |
1248 | array_list = NULL; | |
1249 | for(; array_list ; array_list = array_list->next) { | |
dbb44303 N |
1250 | char *dn; |
1251 | if (array_list->member == NULL || | |
1252 | array_list->container == NULL) | |
1253 | continue; | |
1254 | if (strcmp(array_list->member, sub) != 0) | |
1255 | continue; | |
71d60c48 DW |
1256 | if (array_list->uuid_set && |
1257 | !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid)) | |
1258 | continue; | |
1771a6e2 N |
1259 | dn = container2devname(array_list->container); |
1260 | if (dn == NULL) | |
dbb44303 | 1261 | continue; |
dbb44303 N |
1262 | if (strncmp(dn, ra->text_version+1, |
1263 | strlen(dn)) != 0 || | |
1264 | ra->text_version[strlen(dn)+1] != '/') { | |
1265 | free(dn); | |
1266 | continue; | |
1267 | } | |
1268 | free(dn); | |
1269 | /* we have a match */ | |
1270 | match = array_list; | |
71d60c48 DW |
1271 | if (verbose>0) |
1272 | fprintf(stderr, Name ": match found for member %s\n", | |
1273 | array_list->member); | |
dbb44303 N |
1274 | break; |
1275 | } | |
dbb44303 | 1276 | |
112cace6 N |
1277 | if (match && match->devname && |
1278 | strcasecmp(match->devname, "<ignore>") == 0) { | |
1279 | if (verbose > 0) | |
1280 | fprintf(stderr, Name ": array %s/%s is " | |
1281 | "explicitly ignored by mdadm.conf\n", | |
1282 | match->container, match->member); | |
1283 | return 2; | |
1284 | } | |
05833051 N |
1285 | if (match) |
1286 | trustworthy = LOCAL; | |
112cace6 | 1287 | |
30926600 N |
1288 | mdfd = create_mddev(match ? match->devname : NULL, |
1289 | ra->name, | |
1290 | autof, | |
1291 | trustworthy, | |
1292 | chosen_name); | |
1293 | } | |
598f0d58 NB |
1294 | |
1295 | if (mdfd < 0) { | |
1296 | fprintf(stderr, Name ": failed to open %s: %s.\n", | |
1297 | chosen_name, strerror(errno)); | |
1298 | return 2; | |
1299 | } | |
1300 | ||
03b7f6c6 N |
1301 | assemble_container_content(st, mdfd, ra, runstop, |
1302 | chosen_name, verbose); | |
598f0d58 | 1303 | } |
ad5bc697 | 1304 | map_unlock(&map); |
598f0d58 NB |
1305 | return 0; |
1306 | } | |
29ba4804 N |
1307 | |
1308 | /* | |
1309 | * IncrementalRemove - Attempt to see if the passed in device belongs to any | |
1310 | * raid arrays, and if so first fail (if needed) and then remove the device. | |
1311 | * | |
1312 | * @devname - The device we want to remove | |
1313 | * | |
1314 | * Note: the device name must be a kernel name like "sda", so | |
1315 | * that we can find it in /proc/mdstat | |
1316 | */ | |
1317 | int IncrementalRemove(char *devname, int verbose) | |
1318 | { | |
1319 | int mdfd; | |
aae3cdc3 | 1320 | int rv; |
29ba4804 N |
1321 | struct mdstat_ent *ent; |
1322 | struct mddev_dev_s devlist; | |
1323 | ||
1324 | if (strchr(devname, '/')) { | |
1325 | fprintf(stderr, Name ": incremental removal requires a " | |
1326 | "kernel device name, not a file: %s\n", devname); | |
1327 | return 1; | |
1328 | } | |
1329 | ent = mdstat_by_component(devname); | |
1330 | if (!ent) { | |
1331 | fprintf(stderr, Name ": %s does not appear to be a component " | |
1332 | "of any array\n", devname); | |
1333 | return 1; | |
1334 | } | |
1335 | mdfd = open_dev(ent->devnum); | |
1336 | if (mdfd < 0) { | |
1337 | fprintf(stderr, Name ": Cannot open array %s!!\n", ent->dev); | |
1338 | return 1; | |
1339 | } | |
1340 | memset(&devlist, 0, sizeof(devlist)); | |
1341 | devlist.devname = devname; | |
1342 | devlist.disposition = 'f'; | |
7d2e6486 | 1343 | Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0); |
29ba4804 | 1344 | devlist.disposition = 'r'; |
aae3cdc3 PC |
1345 | rv = Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0); |
1346 | close(mdfd); | |
1347 | return rv; | |
29ba4804 | 1348 | } |