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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 | * | |
5 | * Copyright (C) 2006 Neil Brown <neilb@suse.de> | |
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, | |
40 | struct supertype *st, char *homehost, int autof) | |
41 | { | |
42 | /* Add this device to an array, creating the array if necessary | |
598f0d58 | 43 | * and starting the array if sensible or - if runstop>0 - if possible. |
8382f19b NB |
44 | * |
45 | * This has several steps: | |
46 | * | |
47 | * 1/ Check if device is permitted by mdadm.conf, reject if not. | |
48 | * 2/ Find metadata, reject if none appropriate (check | |
49 | * version/name from args) | |
50 | * 3/ Check if there is a match in mdadm.conf | |
51 | * 3a/ if not, check for homehost match. If no match, reject. | |
52 | * 4/ Determine device number. | |
53 | * - If in mdadm.conf with std name, use that | |
54 | * - UUID in /var/run/mdadm.map use that | |
55 | * - If name is suggestive, use that. unless in use with different uuid. | |
56 | * - Choose a free, high number. | |
57 | * - Use a partitioned device unless strong suggestion not to. | |
58 | * e.g. auto=md | |
352452c3 | 59 | * Don't choose partitioned for containers. |
8382f19b NB |
60 | * 5/ Find out if array already exists |
61 | * 5a/ if it does not | |
62 | * - choose a name, from mdadm.conf or 'name' field in array. | |
63 | * - create the array | |
64 | * - add the device | |
65 | * 5b/ if it does | |
66 | * - check one drive in array to make sure metadata is a reasonably | |
67 | * close match. Reject if not (e.g. different type) | |
68 | * - add the device | |
69 | * 6/ Make sure /var/run/mdadm.map contains this array. | |
70 | * 7/ Is there enough devices to possibly start the array? | |
352452c3 | 71 | * For a container, this means running Incremental_container. |
8382f19b NB |
72 | * 7a/ if not, finish with success. |
73 | * 7b/ if yes, | |
74 | * - read all metadata and arrange devices like -A does | |
75 | * - if number of OK devices match expected, or -R and there are enough, | |
76 | * start the array (auto-readonly). | |
77 | */ | |
78 | struct stat stb; | |
f35f2525 | 79 | struct mdinfo info; |
8382f19b NB |
80 | struct mddev_ident_s *array_list, *match; |
81 | char chosen_name[1024]; | |
82 | int rv; | |
83 | int devnum; | |
84 | struct map_ent *mp, *map = NULL; | |
85 | int dfd, mdfd; | |
86 | char *avail; | |
87 | int active_disks; | |
88 | ||
89 | ||
90 | struct createinfo *ci = conf_get_create_info(); | |
91 | ||
92 | if (autof == 0) | |
93 | autof = ci->autof; | |
94 | ||
352452c3 | 95 | /* 1/ Check if device is permitted by mdadm.conf */ |
8382f19b NB |
96 | |
97 | if (!conf_test_dev(devname)) { | |
98 | if (verbose >= 0) | |
99 | fprintf(stderr, Name | |
100 | ": %s not permitted by mdadm.conf.\n", | |
101 | devname); | |
102 | return 1; | |
103 | } | |
104 | ||
105 | /* 2/ Find metadata, reject if none appropriate (check | |
106 | * version/name from args) */ | |
107 | ||
108 | dfd = dev_open(devname, O_RDONLY|O_EXCL); | |
109 | if (dfd < 0) { | |
110 | if (verbose >= 0) | |
111 | fprintf(stderr, Name ": cannot open %s: %s.\n", | |
112 | devname, strerror(errno)); | |
113 | return 1; | |
114 | } | |
115 | if (fstat(dfd, &stb) < 0) { | |
116 | if (verbose >= 0) | |
117 | fprintf(stderr, Name ": fstat failed for %s: %s.\n", | |
118 | devname, strerror(errno)); | |
119 | close(dfd); | |
120 | return 1; | |
121 | } | |
122 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
123 | if (verbose >= 0) | |
124 | fprintf(stderr, Name ": %s is not a block device.\n", | |
125 | devname); | |
126 | close(dfd); | |
127 | return 1; | |
128 | } | |
129 | ||
130 | if (st == NULL && (st = guess_super(dfd)) == NULL) { | |
131 | if (verbose >= 0) | |
132 | fprintf(stderr, Name | |
133 | ": no recognisable superblock on %s.\n", | |
134 | devname); | |
135 | close(dfd); | |
136 | return 1; | |
137 | } | |
3da92f27 | 138 | if (st->ss->load_super(st, dfd, NULL)) { |
8382f19b NB |
139 | if (verbose >= 0) |
140 | fprintf(stderr, Name ": no RAID superblock on %s.\n", | |
141 | devname); | |
142 | close(dfd); | |
143 | return 1; | |
144 | } | |
8382f19b NB |
145 | close (dfd); |
146 | ||
352452c3 | 147 | if (st->ss->container_content && st->loaded_container) { |
598f0d58 NB |
148 | /* This is a pre-built container array, so we do something |
149 | * rather different. | |
150 | */ | |
151 | return Incremental_container(st, devname, verbose, runstop, | |
152 | autof); | |
153 | } | |
154 | ||
f35f2525 | 155 | memset(&info, 0, sizeof(info)); |
598f0d58 | 156 | st->ss->getinfo_super(st, &info); |
8382f19b NB |
157 | /* 3/ Check if there is a match in mdadm.conf */ |
158 | ||
159 | array_list = conf_get_ident(NULL); | |
160 | match = NULL; | |
161 | for (; array_list; array_list = array_list->next) { | |
162 | if (array_list->uuid_set && | |
163 | same_uuid(array_list->uuid, info.uuid, st->ss->swapuuid) | |
164 | == 0) { | |
165 | if (verbose >= 2) | |
166 | fprintf(stderr, Name | |
167 | ": UUID differs from %s.\n", | |
168 | array_list->devname); | |
169 | continue; | |
170 | } | |
171 | if (array_list->name[0] && | |
172 | strcasecmp(array_list->name, info.name) != 0) { | |
173 | if (verbose >= 2) | |
174 | fprintf(stderr, Name | |
175 | ": Name differs from %s.\n", | |
176 | array_list->devname); | |
177 | continue; | |
178 | } | |
179 | if (array_list->devices && | |
180 | !match_oneof(array_list->devices, devname)) { | |
181 | if (verbose >= 2) | |
182 | fprintf(stderr, Name | |
183 | ": Not a listed device for %s.\n", | |
184 | array_list->devname); | |
185 | continue; | |
186 | } | |
187 | if (array_list->super_minor != UnSet && | |
188 | array_list->super_minor != info.array.md_minor) { | |
189 | if (verbose >= 2) | |
190 | fprintf(stderr, Name | |
191 | ": Different super-minor to %s.\n", | |
192 | array_list->devname); | |
193 | continue; | |
194 | } | |
195 | if (!array_list->uuid_set && | |
196 | !array_list->name[0] && | |
197 | !array_list->devices && | |
198 | array_list->super_minor == UnSet) { | |
199 | if (verbose >= 2) | |
200 | fprintf(stderr, Name | |
201 | ": %s doesn't have any identifying information.\n", | |
202 | array_list->devname); | |
203 | continue; | |
204 | } | |
205 | /* FIXME, should I check raid_disks and level too?? */ | |
206 | ||
207 | if (match) { | |
208 | if (verbose >= 0) | |
209 | fprintf(stderr, Name | |
210 | ": we match both %s and %s - cannot decide which to use.\n", | |
211 | match->devname, array_list->devname); | |
212 | return 2; | |
213 | } | |
214 | match = array_list; | |
215 | } | |
216 | ||
217 | /* 3a/ if not, check for homehost match. If no match, reject. */ | |
218 | if (!match) { | |
219 | if (homehost == NULL || | |
9362c1c8 | 220 | st->ss->match_home(st, homehost) != 1) { |
8382f19b NB |
221 | if (verbose >= 0) |
222 | fprintf(stderr, Name | |
223 | ": not found in mdadm.conf and not identified by homehost.\n"); | |
224 | return 2; | |
225 | } | |
226 | } | |
227 | /* 4/ Determine device number. */ | |
228 | /* - If in mdadm.conf with std name, use that */ | |
229 | /* - UUID in /var/run/mdadm.map use that */ | |
230 | /* - If name is suggestive, use that. unless in use with */ | |
231 | /* different uuid. */ | |
232 | /* - Choose a free, high number. */ | |
233 | /* - Use a partitioned device unless strong suggestion not to. */ | |
234 | /* e.g. auto=md */ | |
235 | if (match && is_standard(match->devname, &devnum)) | |
236 | /* We have devnum now */; | |
237 | else if ((mp = map_by_uuid(&map, info.uuid)) != NULL) | |
238 | devnum = mp->devnum; | |
239 | else { | |
240 | /* Have to guess a bit. */ | |
241 | int use_partitions = 1; | |
242 | char *np, *ep; | |
25dbe93a | 243 | char *nm, nbuf[1024]; |
c5afc314 N |
244 | struct stat stb2; |
245 | ||
8382f19b NB |
246 | if ((autof&7) == 3 || (autof&7) == 5) |
247 | use_partitions = 0; | |
352452c3 N |
248 | if (st->ss->external) |
249 | use_partitions = 0; | |
8382f19b NB |
250 | np = strchr(info.name, ':'); |
251 | if (np) | |
252 | np++; | |
253 | else | |
254 | np = info.name; | |
255 | devnum = strtoul(np, &ep, 10); | |
256 | if (ep > np && *ep == 0) { | |
257 | /* This is a number. Let check that it is unused. */ | |
258 | if (mddev_busy(use_partitions ? (-1-devnum) : devnum)) | |
259 | devnum = -1; | |
260 | } else | |
261 | devnum = -1; | |
262 | ||
25dbe93a NB |
263 | if (match) |
264 | nm = match->devname; | |
265 | else { | |
266 | sprintf(nbuf, "/dev/md/%s", np); | |
267 | nm = nbuf; | |
268 | } | |
c5afc314 N |
269 | if (stat(nm, &stb2) == 0 && |
270 | S_ISBLK(stb2.st_mode) && | |
271 | major(stb2.st_rdev) == (use_partitions ? | |
272 | get_mdp_major() : MD_MAJOR)) { | |
25dbe93a | 273 | if (use_partitions) |
c5afc314 | 274 | devnum = minor(stb2.st_rdev) >> MdpMinorShift; |
25dbe93a | 275 | else |
c5afc314 | 276 | devnum = minor(stb2.st_rdev); |
25dbe93a NB |
277 | if (mddev_busy(use_partitions ? (-1-devnum) : devnum)) |
278 | devnum = -1; | |
279 | } | |
280 | ||
8382f19b NB |
281 | if (devnum < 0) { |
282 | /* Haven't found anything yet, choose something free */ | |
63152c1b NB |
283 | devnum = find_free_devnum(use_partitions); |
284 | ||
285 | if (devnum == NoMdDev) { | |
8382f19b NB |
286 | fprintf(stderr, Name |
287 | ": No spare md devices!!\n"); | |
288 | return 2; | |
289 | } | |
63152c1b NB |
290 | } else |
291 | devnum = use_partitions ? (-1-devnum) : devnum; | |
8382f19b NB |
292 | } |
293 | mdfd = open_mddev_devnum(match ? match->devname : NULL, | |
294 | devnum, | |
295 | info.name, | |
9a02c62a | 296 | chosen_name, autof >> 3); |
8382f19b NB |
297 | if (mdfd < 0) { |
298 | fprintf(stderr, Name ": failed to open %s: %s.\n", | |
299 | chosen_name, strerror(errno)); | |
300 | return 2; | |
301 | } | |
f35f2525 N |
302 | sysfs_init(&info, mdfd, 0); |
303 | ||
8382f19b NB |
304 | /* 5/ Find out if array already exists */ |
305 | if (! mddev_busy(devnum)) { | |
306 | /* 5a/ if it does not */ | |
307 | /* - choose a name, from mdadm.conf or 'name' field in array. */ | |
308 | /* - create the array */ | |
309 | /* - add the device */ | |
7e0f6979 | 310 | struct mdinfo *sra; |
c5afc314 | 311 | struct mdinfo dinfo; |
8382f19b | 312 | |
f35f2525 N |
313 | if (set_array_info(mdfd, st, &info) != 0) { |
314 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", | |
8382f19b NB |
315 | chosen_name, strerror(errno)); |
316 | close(mdfd); | |
317 | return 2; | |
318 | } | |
7801ac20 | 319 | |
c5afc314 N |
320 | dinfo = info; |
321 | dinfo.disk.major = major(stb.st_rdev); | |
322 | dinfo.disk.minor = minor(stb.st_rdev); | |
323 | if (add_disk(mdfd, st, &info, &dinfo) != 0) { | |
8382f19b NB |
324 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", |
325 | devname, chosen_name, strerror(errno)); | |
326 | ioctl(mdfd, STOP_ARRAY, 0); | |
327 | close(mdfd); | |
328 | return 2; | |
329 | } | |
330 | sra = sysfs_read(mdfd, devnum, GET_DEVS); | |
06c7f68e | 331 | if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) { |
8382f19b NB |
332 | /* It really should be 'none' - must be old buggy |
333 | * kernel, and mdadm -I may not be able to complete. | |
334 | * So reject it. | |
335 | */ | |
336 | ioctl(mdfd, STOP_ARRAY, NULL); | |
337 | fprintf(stderr, Name | |
338 | ": You have an old buggy kernel which cannot support\n" | |
339 | " --incremental reliably. Aborting.\n"); | |
340 | close(mdfd); | |
341 | sysfs_free(sra); | |
342 | return 2; | |
343 | } | |
c5afc314 | 344 | info.array.working_disks = 1; |
f35f2525 | 345 | sysfs_free(sra); |
8382f19b NB |
346 | } else { |
347 | /* 5b/ if it does */ | |
348 | /* - check one drive in array to make sure metadata is a reasonably */ | |
349 | /* close match. Reject if not (e.g. different type) */ | |
350 | /* - add the device */ | |
351 | char dn[20]; | |
352 | int dfd2; | |
8382f19b | 353 | int err; |
7e0f6979 | 354 | struct mdinfo *sra; |
3da92f27 | 355 | struct supertype *st2; |
c5afc314 | 356 | struct mdinfo info2, *d; |
b8ac1967 | 357 | sra = sysfs_read(mdfd, devnum, (GET_DEVS | GET_STATE)); |
2cdb6489 | 358 | |
06c7f68e NB |
359 | sprintf(dn, "%d:%d", sra->devs->disk.major, |
360 | sra->devs->disk.minor); | |
8382f19b | 361 | dfd2 = dev_open(dn, O_RDONLY); |
3da92f27 | 362 | st2 = dup_super(st); |
b8ac1967 NB |
363 | if (st2->ss->load_super(st2, dfd2, NULL) || |
364 | st->ss->compare_super(st, st2) != 0) { | |
8382f19b | 365 | fprintf(stderr, Name |
b8ac1967 NB |
366 | ": metadata mismatch between %s and " |
367 | "chosen array %s\n", | |
368 | devname, chosen_name); | |
8382f19b NB |
369 | close(mdfd); |
370 | close(dfd2); | |
371 | return 2; | |
372 | } | |
373 | close(dfd2); | |
f35f2525 | 374 | memset(&info2, 0, sizeof(info2)); |
3da92f27 NB |
375 | st2->ss->getinfo_super(st2, &info2); |
376 | st2->ss->free_super(st2); | |
8382f19b NB |
377 | if (info.array.level != info2.array.level || |
378 | memcmp(info.uuid, info2.uuid, 16) != 0 || | |
379 | info.array.raid_disks != info2.array.raid_disks) { | |
380 | fprintf(stderr, Name | |
381 | ": unexpected difference between %s and %s.\n", | |
382 | chosen_name, devname); | |
383 | close(mdfd); | |
384 | return 2; | |
385 | } | |
7801ac20 N |
386 | info2.disk.major = major(stb.st_rdev); |
387 | info2.disk.minor = minor(stb.st_rdev); | |
c5afc314 N |
388 | /* add disk needs to know about containers */ |
389 | if (st->ss->external) | |
390 | sra->array.level = LEVEL_CONTAINER; | |
7801ac20 | 391 | err = add_disk(mdfd, st2, sra, &info2); |
8382f19b NB |
392 | if (err < 0 && errno == EBUSY) { |
393 | /* could be another device present with the same | |
394 | * disk.number. Find and reject any such | |
395 | */ | |
396 | find_reject(mdfd, st, sra, info.disk.number, | |
397 | info.events, verbose, chosen_name); | |
7801ac20 | 398 | err = add_disk(mdfd, st2, sra, &info2); |
8382f19b NB |
399 | } |
400 | if (err < 0) { | |
401 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", | |
402 | devname, chosen_name, strerror(errno)); | |
403 | close(mdfd); | |
404 | return 2; | |
405 | } | |
c5afc314 N |
406 | info.array.working_disks = 0; |
407 | for (d = sra->devs; d; d=d->next) | |
408 | info.array.working_disks ++; | |
409 | ||
8382f19b NB |
410 | } |
411 | /* 6/ Make sure /var/run/mdadm.map contains this array. */ | |
412 | map_update(&map, devnum, | |
1522c538 | 413 | info.text_version, |
8382f19b NB |
414 | info.uuid, chosen_name); |
415 | ||
416 | /* 7/ Is there enough devices to possibly start the array? */ | |
417 | /* 7a/ if not, finish with success. */ | |
352452c3 N |
418 | if (info.array.level == LEVEL_CONTAINER) { |
419 | /* Try to assemble within the container */ | |
c5afc314 N |
420 | close(mdfd); |
421 | if (verbose >= 0) | |
422 | fprintf(stderr, Name | |
423 | ": container %s now has %d devices\n", | |
424 | chosen_name, info.array.working_disks); | |
352452c3 N |
425 | return Incremental(chosen_name, verbose, runstop, |
426 | NULL, homehost, autof); | |
427 | } | |
f8409e54 | 428 | avail = NULL; |
8382f19b NB |
429 | active_disks = count_active(st, mdfd, &avail, &info); |
430 | if (enough(info.array.level, info.array.raid_disks, | |
431 | info.array.layout, info.array.state & 1, | |
432 | avail, active_disks) == 0) { | |
433 | free(avail); | |
434 | if (verbose >= 0) | |
435 | fprintf(stderr, Name | |
436 | ": %s attached to %s, not enough to start (%d).\n", | |
437 | devname, chosen_name, active_disks); | |
438 | close(mdfd); | |
439 | return 0; | |
440 | } | |
441 | free(avail); | |
442 | ||
443 | /* 7b/ if yes, */ | |
444 | /* - if number of OK devices match expected, or -R and there */ | |
445 | /* are enough, */ | |
446 | /* + add any bitmap file */ | |
447 | /* + start the array (auto-readonly). */ | |
448 | { | |
449 | mdu_array_info_t ainf; | |
450 | ||
451 | if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) { | |
452 | if (verbose >= 0) | |
453 | fprintf(stderr, Name | |
454 | ": %s attached to %s which is already active.\n", | |
455 | devname, chosen_name); | |
456 | close (mdfd); | |
457 | return 0; | |
458 | } | |
459 | } | |
460 | if (runstop > 0 || active_disks >= info.array.working_disks) { | |
7e0f6979 | 461 | struct mdinfo *sra; |
8382f19b NB |
462 | /* Let's try to start it */ |
463 | if (match && match->bitmap_file) { | |
464 | int bmfd = open(match->bitmap_file, O_RDWR); | |
465 | if (bmfd < 0) { | |
466 | fprintf(stderr, Name | |
467 | ": Could not open bitmap file %s.\n", | |
468 | match->bitmap_file); | |
469 | close(mdfd); | |
470 | return 1; | |
471 | } | |
472 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
473 | close(bmfd); | |
474 | fprintf(stderr, Name | |
475 | ": Failed to set bitmapfile for %s.\n", | |
476 | chosen_name); | |
477 | close(mdfd); | |
478 | return 1; | |
479 | } | |
480 | close(bmfd); | |
481 | } | |
482 | sra = sysfs_read(mdfd, devnum, 0); | |
483 | if (sra == NULL || active_disks >= info.array.working_disks) | |
484 | rv = ioctl(mdfd, RUN_ARRAY, NULL); | |
485 | else | |
486 | rv = sysfs_set_str(sra, NULL, | |
487 | "array_state", "read-auto"); | |
488 | if (rv == 0) { | |
489 | if (verbose >= 0) | |
490 | fprintf(stderr, Name | |
491 | ": %s attached to %s, which has been started.\n", | |
492 | devname, chosen_name); | |
493 | rv = 0; | |
494 | } else { | |
495 | fprintf(stderr, Name | |
496 | ": %s attached to %s, but failed to start: %s.\n", | |
497 | devname, chosen_name, strerror(errno)); | |
498 | rv = 1; | |
499 | } | |
500 | } else { | |
501 | if (verbose >= 0) | |
502 | fprintf(stderr, Name | |
503 | ": %s attached to %s, not enough to start safely.\n", | |
504 | devname, chosen_name); | |
505 | rv = 0; | |
506 | } | |
507 | close(mdfd); | |
508 | return rv; | |
509 | } | |
510 | ||
7e0f6979 | 511 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, |
8382f19b NB |
512 | int number, __u64 events, int verbose, |
513 | char *array_name) | |
514 | { | |
3da92f27 | 515 | /* Find a device attached to this array with a disk.number of number |
8382f19b NB |
516 | * and events less than the passed events, and remove the device. |
517 | */ | |
06c7f68e | 518 | struct mdinfo *d; |
8382f19b NB |
519 | mdu_array_info_t ra; |
520 | ||
521 | if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0) | |
522 | return; /* not safe to remove from active arrays | |
523 | * without thinking more */ | |
524 | ||
525 | for (d = sra->devs; d ; d = d->next) { | |
526 | char dn[10]; | |
527 | int dfd; | |
8382f19b | 528 | struct mdinfo info; |
06c7f68e | 529 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); |
8382f19b NB |
530 | dfd = dev_open(dn, O_RDONLY); |
531 | if (dfd < 0) | |
532 | continue; | |
3da92f27 | 533 | if (st->ss->load_super(st, dfd, NULL)) { |
8382f19b NB |
534 | close(dfd); |
535 | continue; | |
536 | } | |
3da92f27 NB |
537 | st->ss->getinfo_super(st, &info); |
538 | st->ss->free_super(st); | |
8382f19b NB |
539 | close(dfd); |
540 | ||
541 | if (info.disk.number != number || | |
542 | info.events >= events) | |
543 | continue; | |
544 | ||
06c7f68e | 545 | if (d->disk.raid_disk > -1) |
8382f19b NB |
546 | sysfs_set_str(sra, d, "slot", "none"); |
547 | if (sysfs_set_str(sra, d, "state", "remove") == 0) | |
548 | if (verbose >= 0) | |
549 | fprintf(stderr, Name | |
550 | ": removing old device %s from %s\n", | |
06c7f68e | 551 | d->sys_name+4, array_name); |
8382f19b NB |
552 | } |
553 | } | |
554 | ||
555 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
556 | struct mdinfo *bestinfo) | |
557 | { | |
558 | /* count how many devices in sra think they are active */ | |
06c7f68e | 559 | struct mdinfo *d; |
8382f19b NB |
560 | int cnt = 0, cnt1 = 0; |
561 | __u64 max_events = 0; | |
7e0f6979 | 562 | struct mdinfo *sra = sysfs_read(mdfd, -1, GET_DEVS | GET_STATE); |
8382f19b NB |
563 | char *avail = NULL; |
564 | ||
565 | for (d = sra->devs ; d ; d = d->next) { | |
566 | char dn[30]; | |
567 | int dfd; | |
8382f19b NB |
568 | int ok; |
569 | struct mdinfo info; | |
570 | ||
06c7f68e | 571 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); |
8382f19b NB |
572 | dfd = dev_open(dn, O_RDONLY); |
573 | if (dfd < 0) | |
574 | continue; | |
3da92f27 | 575 | ok = st->ss->load_super(st, dfd, NULL); |
8382f19b NB |
576 | close(dfd); |
577 | if (ok != 0) | |
578 | continue; | |
3da92f27 | 579 | st->ss->getinfo_super(st, &info); |
8382f19b NB |
580 | if (info.disk.state & (1<<MD_DISK_SYNC)) |
581 | { | |
582 | if (avail == NULL) { | |
583 | avail = malloc(info.array.raid_disks); | |
584 | memset(avail, 0, info.array.raid_disks); | |
585 | } | |
586 | if (cnt == 0) { | |
587 | cnt++; | |
588 | max_events = info.events; | |
589 | avail[info.disk.raid_disk] = 2; | |
3da92f27 | 590 | st->ss->getinfo_super(st, bestinfo); |
8382f19b NB |
591 | } else if (info.events == max_events) { |
592 | cnt++; | |
593 | avail[info.disk.raid_disk] = 2; | |
594 | } else if (info.events == max_events-1) { | |
595 | cnt1++; | |
596 | avail[info.disk.raid_disk] = 1; | |
597 | } else if (info.events < max_events - 1) | |
598 | ; | |
599 | else if (info.events == max_events+1) { | |
600 | int i; | |
601 | cnt1 = cnt; | |
602 | cnt = 1; | |
603 | max_events = info.events; | |
604 | for (i=0; i<info.array.raid_disks; i++) | |
605 | if (avail[i]) | |
606 | avail[i]--; | |
607 | avail[info.disk.raid_disk] = 2; | |
3da92f27 | 608 | st->ss->getinfo_super(st, bestinfo); |
8382f19b NB |
609 | } else { /* info.events much bigger */ |
610 | cnt = 1; cnt1 = 0; | |
611 | memset(avail, 0, info.disk.raid_disk); | |
612 | max_events = info.events; | |
3da92f27 | 613 | st->ss->getinfo_super(st, bestinfo); |
8382f19b NB |
614 | } |
615 | } | |
3da92f27 | 616 | st->ss->free_super(st); |
8382f19b NB |
617 | } |
618 | return cnt + cnt1; | |
619 | } | |
620 | ||
621 | void RebuildMap(void) | |
622 | { | |
623 | struct mdstat_ent *mdstat = mdstat_read(0, 0); | |
624 | struct mdstat_ent *md; | |
625 | struct map_ent *map = NULL; | |
626 | int mdp = get_mdp_major(); | |
627 | ||
628 | for (md = mdstat ; md ; md = md->next) { | |
7e0f6979 | 629 | struct mdinfo *sra = sysfs_read(-1, md->devnum, GET_DEVS); |
06c7f68e | 630 | struct mdinfo *sd; |
8382f19b NB |
631 | |
632 | for (sd = sra->devs ; sd ; sd = sd->next) { | |
633 | char dn[30]; | |
634 | int dfd; | |
635 | int ok; | |
636 | struct supertype *st; | |
637 | char *path; | |
8382f19b NB |
638 | struct mdinfo info; |
639 | ||
06c7f68e | 640 | sprintf(dn, "%d:%d", sd->disk.major, sd->disk.minor); |
8382f19b NB |
641 | dfd = dev_open(dn, O_RDONLY); |
642 | if (dfd < 0) | |
643 | continue; | |
644 | st = guess_super(dfd); | |
645 | if ( st == NULL) | |
646 | ok = -1; | |
647 | else | |
3da92f27 | 648 | ok = st->ss->load_super(st, dfd, NULL); |
8382f19b NB |
649 | close(dfd); |
650 | if (ok != 0) | |
651 | continue; | |
3da92f27 | 652 | st->ss->getinfo_super(st, &info); |
8382f19b NB |
653 | if (md->devnum > 0) |
654 | path = map_dev(MD_MAJOR, md->devnum, 0); | |
655 | else | |
656 | path = map_dev(mdp, (-1-md->devnum)<< 6, 0); | |
1522c538 NB |
657 | map_add(&map, md->devnum, |
658 | info.text_version, | |
8382f19b | 659 | info.uuid, path ? : "/unknown"); |
3da92f27 | 660 | st->ss->free_super(st); |
8382f19b NB |
661 | break; |
662 | } | |
663 | } | |
664 | map_write(map); | |
665 | map_free(map); | |
666 | } | |
667 | ||
668 | int IncrementalScan(int verbose) | |
669 | { | |
670 | /* look at every device listed in the 'map' file. | |
671 | * If one is found that is not running then: | |
672 | * look in mdadm.conf for bitmap file. | |
673 | * if one exists, but array has none, add it. | |
674 | * try to start array in auto-readonly mode | |
675 | */ | |
676 | struct map_ent *mapl = NULL; | |
677 | struct map_ent *me; | |
678 | mddev_ident_t devs, mddev; | |
679 | int rv = 0; | |
680 | ||
681 | map_read(&mapl); | |
682 | devs = conf_get_ident(NULL); | |
683 | ||
684 | for (me = mapl ; me ; me = me->next) { | |
685 | char path[1024]; | |
686 | mdu_array_info_t array; | |
687 | mdu_bitmap_file_t bmf; | |
7e0f6979 | 688 | struct mdinfo *sra; |
9a02c62a NB |
689 | int mdfd = open_mddev_devnum(me->path, me->devnum, |
690 | NULL, path, 0); | |
8382f19b NB |
691 | if (mdfd < 0) |
692 | continue; | |
693 | if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 || | |
694 | errno != ENODEV) { | |
695 | close(mdfd); | |
696 | continue; | |
697 | } | |
698 | /* Ok, we can try this one. Maybe it needs a bitmap */ | |
699 | for (mddev = devs ; mddev ; mddev = mddev->next) | |
700 | if (strcmp(mddev->devname, me->path) == 0) | |
701 | break; | |
702 | if (mddev && mddev->bitmap_file) { | |
703 | /* | |
704 | * Note: early kernels will wrongly fail this, so it | |
705 | * is a hint only | |
706 | */ | |
707 | int added = -1; | |
708 | if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) { | |
709 | int bmfd = open(mddev->bitmap_file, O_RDWR); | |
710 | if (bmfd >= 0) { | |
711 | added = ioctl(mdfd, SET_BITMAP_FILE, | |
712 | bmfd); | |
713 | close(bmfd); | |
714 | } | |
715 | } | |
716 | if (verbose >= 0) { | |
717 | if (added == 0) | |
718 | fprintf(stderr, Name | |
719 | ": Added bitmap %s to %s\n", | |
720 | mddev->bitmap_file, me->path); | |
721 | else if (errno != EEXIST) | |
722 | fprintf(stderr, Name | |
723 | ": Failed to add bitmap to %s: %s\n", | |
724 | me->path, strerror(errno)); | |
725 | } | |
726 | } | |
727 | sra = sysfs_read(mdfd, 0, 0); | |
728 | if (sra) { | |
729 | if (sysfs_set_str(sra, NULL, | |
730 | "array_state", "read-auto") == 0) { | |
731 | if (verbose >= 0) | |
732 | fprintf(stderr, Name | |
733 | ": started array %s\n", | |
734 | me->path); | |
735 | } else { | |
736 | fprintf(stderr, Name | |
737 | ": failed to start array %s: %s\n", | |
738 | me->path, strerror(errno)); | |
739 | rv = 1; | |
740 | } | |
741 | } | |
742 | } | |
743 | return rv; | |
744 | } | |
598f0d58 | 745 | |
5f2aace8 DW |
746 | static char *container2devname(char *devname) |
747 | { | |
748 | int fd = open(devname, O_RDONLY); | |
749 | char *mdname = NULL; | |
750 | ||
d7161f3b | 751 | if (fd >= 0) { |
5f2aace8 DW |
752 | mdname = devnum2devname(fd2devnum(fd)); |
753 | close(fd); | |
754 | } | |
755 | ||
756 | return mdname; | |
757 | } | |
758 | ||
598f0d58 NB |
759 | int Incremental_container(struct supertype *st, char *devname, int verbose, |
760 | int runstop, int autof) | |
761 | { | |
762 | /* Collect the contents of this container and for each | |
763 | * array, choose a device name and assemble the array. | |
764 | */ | |
765 | ||
766 | struct mdinfo *list = st->ss->container_content(st); | |
767 | struct mdinfo *ra; | |
5f2aace8 DW |
768 | char *mdname = container2devname(devname); |
769 | ||
770 | if (!mdname) { | |
771 | fprintf(stderr, Name": failed to determine device name\n"); | |
772 | return 2; | |
773 | } | |
598f0d58 NB |
774 | |
775 | for (ra = list ; ra ; ra = ra->next) { | |
598f0d58 NB |
776 | struct mdinfo *dev; |
777 | int devnum = -1; | |
778 | int mdfd; | |
779 | char chosen_name[1024]; | |
780 | int usepart = 1; | |
781 | char *n; | |
c5afc314 N |
782 | int working = 0, preexist = 0; |
783 | struct map_ent *mp, *map = NULL; | |
598f0d58 NB |
784 | |
785 | if ((autof&7) == 3 || (autof&7) == 5) | |
786 | usepart = 0; | |
787 | ||
c5afc314 N |
788 | mp = map_by_uuid(&map, ra->uuid); |
789 | if (mp) | |
790 | devnum = mp->devnum; | |
791 | else { | |
598f0d58 | 792 | |
c5afc314 N |
793 | n = ra->name; |
794 | if (*n == 'd') | |
795 | n++; | |
796 | if (*n && devnum < 0) { | |
797 | devnum = strtoul(n, &n, 10); | |
798 | if (devnum >= 0 && (*n == 0 || *n == ' ')) { | |
799 | /* Use this devnum */ | |
800 | usepart = (ra->name[0] == 'd'); | |
801 | if (mddev_busy(usepart ? (-1-devnum) : devnum)) | |
802 | devnum = -1; | |
803 | } else | |
25dbe93a NB |
804 | devnum = -1; |
805 | } | |
25dbe93a | 806 | |
c5afc314 N |
807 | if (devnum < 0) { |
808 | char *nm = ra->name; | |
809 | char nbuf[1024]; | |
810 | struct stat stb; | |
811 | if (strchr(nm, ':')) | |
812 | nm = strchr(nm, ':')+1; | |
813 | sprintf(nbuf, "/dev/md/%s", nm); | |
814 | ||
815 | if (stat(nbuf, &stb) == 0 && | |
816 | S_ISBLK(stb.st_mode) && | |
817 | major(stb.st_rdev) == (usepart ? | |
818 | get_mdp_major() : MD_MAJOR)){ | |
819 | if (usepart) | |
820 | devnum = minor(stb.st_rdev) | |
821 | >> MdpMinorShift; | |
822 | else | |
823 | devnum = minor(stb.st_rdev); | |
824 | if (mddev_busy(usepart ? (-1-devnum) : devnum)) | |
825 | devnum = -1; | |
826 | } | |
827 | } | |
828 | ||
829 | if (devnum >= 0) | |
830 | devnum = usepart ? (-1-devnum) : devnum; | |
831 | else | |
832 | devnum = find_free_devnum(usepart); | |
833 | } | |
834 | mdfd = open_mddev_devnum(mp ? mp->path : NULL, devnum, ra->name, | |
598f0d58 NB |
835 | chosen_name, autof>>3); |
836 | ||
837 | if (mdfd < 0) { | |
838 | fprintf(stderr, Name ": failed to open %s: %s.\n", | |
839 | chosen_name, strerror(errno)); | |
840 | return 2; | |
841 | } | |
842 | ||
f35f2525 N |
843 | sysfs_init(ra, mdfd, 0); |
844 | sysfs_set_array(ra, md_get_version(mdfd)); | |
2318b9f0 | 845 | for (dev = ra->devs; dev; dev = dev->next) |
f35f2525 | 846 | if (sysfs_add_disk(ra, dev) == 0) |
598f0d58 | 847 | working++; |
c5afc314 N |
848 | else if (errno == EEXIST) |
849 | preexist++; | |
850 | if (working == 0) | |
851 | /* Nothing new, don't try to start */ ; | |
852 | else if (runstop > 0 || | |
853 | (working + preexist) >= ra->array.working_disks) { | |
598f0d58 NB |
854 | switch(ra->array.level) { |
855 | case LEVEL_LINEAR: | |
856 | case LEVEL_MULTIPATH: | |
857 | case 0: | |
f35f2525 | 858 | sysfs_set_str(ra, NULL, "array_state", |
598f0d58 NB |
859 | "active"); |
860 | break; | |
861 | default: | |
f35f2525 | 862 | sysfs_set_str(ra, NULL, "array_state", |
598f0d58 | 863 | "readonly"); |
75aa18b5 | 864 | /* start mdmon if needed. */ |
8850ee3e N |
865 | if (!mdmon_running(st->container_dev)) |
866 | start_mdmon(st->container_dev); | |
867 | ping_monitor(devnum2devname(st->container_dev)); | |
598f0d58 NB |
868 | break; |
869 | } | |
f35f2525 | 870 | sysfs_set_safemode(ra, ra->safe_mode_delay); |
c5afc314 N |
871 | if (verbose >= 0) { |
872 | fprintf(stderr, Name | |
873 | "Started %s with %d devices", | |
874 | chosen_name, working + preexist); | |
875 | if (preexist) | |
876 | fprintf(stderr, " (%d new)", working); | |
877 | fprintf(stderr, "\n"); | |
878 | } | |
75aa18b5 | 879 | /* FIXME should have an O_EXCL and wait for read-auto */ |
598f0d58 NB |
880 | } else |
881 | if (verbose >= 0) | |
c5afc314 N |
882 | fprintf(stderr, Name |
883 | "%s assembled with %d devices but " | |
884 | "not started\n", | |
885 | chosen_name, working); | |
598f0d58 | 886 | close(mdfd); |
c5afc314 N |
887 | map_update(&map, devnum, |
888 | ra->text_version, | |
889 | ra->uuid, chosen_name); | |
598f0d58 NB |
890 | } |
891 | return 0; | |
892 | } |