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Commit | Line | Data |
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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
cd29a5c8 | 4 | * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au> |
64c4757e NB |
5 | * |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
9a9dab36 | 30 | #include "mdadm.h" |
82b27616 | 31 | #include "dlink.h" |
b83d95f3 | 32 | #include <sys/dir.h> |
82b27616 | 33 | #include <glob.h> |
52826846 | 34 | #include <fnmatch.h> |
dd0781e5 | 35 | #include <ctype.h> |
52826846 | 36 | |
64c4757e NB |
37 | /* |
38 | * Read the config file | |
39 | * | |
40 | * conf_get_uuids gets a list of devicename+uuid pairs | |
41 | * conf_get_devs gets device names after expanding wildcards | |
42 | * | |
43 | * Each keeps the returned list and frees it when asked to make | |
44 | * a new list. | |
45 | * | |
82b27616 NB |
46 | * The format of the config file needs to be fairly extensible. |
47 | * Now, arrays only have names and uuids and devices merely are. | |
48 | * But later arrays might want names, and devices might want superblock | |
49 | * versions, and who knows what else. | |
50 | * I like free format, abhore backslash line continuation, adore | |
51 | * indentation for structure and am ok about # comments. | |
52 | * | |
53 | * So, each line that isn't blank or a #comment must either start | |
54 | * with a key word, and not be indented, or must start with a | |
55 | * non-key-word and must be indented. | |
56 | * | |
57 | * Keywords are DEVICE and ARRAY | |
58 | * DEV{ICE} introduces some devices that might contain raid components. | |
59 | * e.g. | |
60 | * DEV style=0 /dev/sda* /dev/hd* | |
61 | * DEV style=1 /dev/sd[b-f]* | |
62 | * ARR{AY} describes an array giving md device and attributes like uuid=whatever | |
63 | * e.g. | |
64 | * ARRAY /dev/md0 uuid=whatever name=something | |
65 | * Spaces separate words on each line. Quoting, with "" or '' protects them, | |
66 | * but may not wrap over lines | |
67 | * | |
64c4757e NB |
68 | */ |
69 | ||
11a3e71d NB |
70 | #ifndef CONFFILE |
71 | #define CONFFILE "/etc/mdadm.conf" | |
72 | #endif | |
73 | char DefaultConfFile[] = CONFFILE; | |
64c4757e | 74 | |
e0d19036 | 75 | char *keywords[] = { "device", "array", "mailaddr", "program", NULL }; |
82b27616 NB |
76 | |
77 | /* | |
78 | * match_keyword returns an index into the keywords array, or -1 for no match | |
79 | * case is ignored, and at least three characters must be given | |
80 | */ | |
81 | ||
82 | int match_keyword(char *word) | |
83 | { | |
52826846 NB |
84 | int len = strlen(word); |
85 | int n; | |
82b27616 | 86 | |
52826846 NB |
87 | if (len < 3) return -1; |
88 | for (n=0; keywords[n]; n++) { | |
89 | if (strncasecmp(word, keywords[n], len)==0) | |
90 | return n; | |
91 | } | |
92 | return -1; | |
82b27616 NB |
93 | } |
94 | ||
95 | /* conf_word gets one word from the conf file. | |
96 | * if "allow_key", then accept words at the start of a line, | |
97 | * otherwise stop when such a word is found. | |
98 | * We assume that the file pointer is at the end of a word, so the | |
99 | * next character is a space, or a newline. If not, it is the start of a line. | |
100 | */ | |
101 | ||
102 | char *conf_word(FILE *file, int allow_key) | |
103 | { | |
52826846 NB |
104 | int wsize = 100; |
105 | int len = 0; | |
106 | int c; | |
107 | int quote; | |
108 | int wordfound = 0; | |
109 | char *word = malloc(wsize); | |
82b27616 | 110 | |
52826846 NB |
111 | if (!word) abort(); |
112 | ||
113 | while (wordfound==0) { | |
114 | /* at the end of a word.. */ | |
82b27616 | 115 | c = getc(file); |
52826846 NB |
116 | if (c == '#') |
117 | while (c != EOF && c != '\n') | |
118 | c = getc(file); | |
119 | if (c == EOF) break; | |
120 | if (c == '\n') continue; | |
121 | ||
122 | if (c != ' ' && c != '\t' && ! allow_key) { | |
123 | ungetc(c, file); | |
124 | break; | |
125 | } | |
126 | /* looks like it is safe to get a word here, if there is one */ | |
127 | quote = 0; | |
128 | /* first, skip any spaces */ | |
129 | while (c == ' ' || c == '\t') | |
130 | c = getc(file); | |
131 | if (c != EOF && c != '\n' && c != '#') { | |
132 | /* we really have a character of a word, so start saving it */ | |
133 | while (c != EOF && c != '\n' && (quote || (c!=' ' && c != '\t'))) { | |
134 | wordfound = 1; | |
135 | if (quote && c == quote) quote = 0; | |
136 | else if (quote == 0 && (c == '\'' || c == '"')) | |
137 | quote = c; | |
138 | else { | |
139 | if (len == wsize-1) { | |
140 | wsize += 100; | |
141 | word = realloc(word, wsize); | |
142 | if (!word) abort(); | |
143 | } | |
144 | word[len++] = c; | |
145 | } | |
146 | c = getc(file); | |
147 | } | |
148 | } | |
149 | if (c != EOF) ungetc(c, file); | |
82b27616 | 150 | } |
52826846 | 151 | word[len] = 0; |
82b27616 | 152 | /* printf("word is <%s>\n", word); */ |
52826846 NB |
153 | if (!wordfound) { |
154 | free(word); | |
155 | word = NULL; | |
156 | } | |
157 | return word; | |
82b27616 NB |
158 | } |
159 | ||
160 | /* | |
161 | * conf_line reads one logical line from the conffile. | |
162 | * It skips comments and continues until it finds a line that starts | |
163 | * with a non blank/comment. This character is pushed back for the next call | |
164 | * A doubly linked list of words is returned. | |
165 | * the first word will be a keyword. Other words will have had quotes removed. | |
166 | */ | |
167 | ||
168 | char *conf_line(FILE *file) | |
169 | { | |
52826846 NB |
170 | char *w; |
171 | char *list; | |
82b27616 | 172 | |
52826846 NB |
173 | w = conf_word(file, 1); |
174 | if (w == NULL) return NULL; | |
82b27616 | 175 | |
52826846 | 176 | list = dl_strdup(w); |
82b27616 | 177 | free(w); |
52826846 NB |
178 | dl_init(list); |
179 | ||
180 | while ((w = conf_word(file,0))){ | |
181 | char *w2 = dl_strdup(w); | |
182 | free(w); | |
183 | dl_add(list, w2); | |
184 | } | |
82b27616 | 185 | /* printf("got a line\n");*/ |
52826846 | 186 | return list; |
82b27616 NB |
187 | } |
188 | ||
189 | void free_line(char *line) | |
190 | { | |
52826846 NB |
191 | char *w; |
192 | for (w=dl_next(line); w != line; w=dl_next(line)) { | |
193 | dl_del(w); | |
194 | dl_free(w); | |
195 | } | |
196 | dl_free(line); | |
82b27616 NB |
197 | } |
198 | ||
199 | ||
200 | struct conf_dev { | |
201 | struct conf_dev *next; | |
202 | char *name; | |
203 | } *cdevlist = NULL; | |
204 | ||
5787fa49 NB |
205 | void load_partitions(void) |
206 | { | |
207 | FILE *f = fopen("/proc/partitions", "r"); | |
208 | char buf[1024]; | |
209 | if (f == NULL) { | |
210 | fprintf(stderr, Name ": cannot open /proc/partitions\n"); | |
211 | return; | |
212 | } | |
213 | while (fgets(buf, 1024, f)) { | |
214 | int major, minor; | |
98c6faba | 215 | char *name, *mp; |
5787fa49 NB |
216 | buf[1023] = '\0'; |
217 | if (buf[0] != ' ') | |
218 | continue; | |
98c6faba NB |
219 | major = strtoul(buf, &mp, 10); |
220 | if (mp == buf || *mp != ' ') | |
5787fa49 | 221 | continue; |
98c6faba NB |
222 | minor = strtoul(mp, NULL, 10); |
223 | ||
5787fa49 NB |
224 | name = map_dev(major, minor); |
225 | if (name) { | |
226 | struct conf_dev *cd; | |
227 | ||
228 | cd = malloc(sizeof(*cd)); | |
229 | cd->name = strdup(name); | |
230 | cd->next = cdevlist; | |
231 | cdevlist = cd; | |
232 | } | |
233 | } | |
dd0781e5 | 234 | fclose(f); |
5787fa49 | 235 | } |
82b27616 NB |
236 | |
237 | ||
e0d19036 | 238 | void devline(char *line) |
82b27616 | 239 | { |
52826846 NB |
240 | char *w; |
241 | struct conf_dev *cd; | |
242 | ||
243 | for (w=dl_next(line); w != line; w=dl_next(w)) { | |
244 | if (w[0] == '/') { | |
245 | cd = malloc(sizeof(*cd)); | |
246 | cd->name = strdup(w); | |
247 | cd->next = cdevlist; | |
248 | cdevlist = cd; | |
5787fa49 NB |
249 | } else if (strcasecmp(w, "partitions") == 0) { |
250 | /* read /proc/partitions, and look major/minor up in /dev */ | |
251 | load_partitions(); | |
52826846 NB |
252 | } else { |
253 | fprintf(stderr, Name ": unreconised word on DEVICE line: %s\n", | |
254 | w); | |
255 | } | |
82b27616 | 256 | } |
82b27616 NB |
257 | } |
258 | ||
52826846 NB |
259 | mddev_ident_t mddevlist = NULL; |
260 | mddev_ident_t *mddevlp = &mddevlist; | |
82b27616 NB |
261 | |
262 | void arrayline(char *line) | |
263 | { | |
52826846 NB |
264 | char *w; |
265 | ||
266 | struct mddev_ident_s mis; | |
267 | mddev_ident_t mi; | |
268 | ||
269 | mis.uuid_set = 0; | |
98c6faba NB |
270 | mis.super_minor = UnSet; |
271 | mis.level = UnSet; | |
272 | mis.raid_disks = UnSet; | |
273 | mis.spare_disks = UnSet; | |
52826846 NB |
274 | mis.devices = NULL; |
275 | mis.devname = NULL; | |
e0d19036 | 276 | mis.spare_group = NULL; |
dd0781e5 | 277 | mis.autof = 0; |
52826846 NB |
278 | |
279 | for (w=dl_next(line); w!=line; w=dl_next(w)) { | |
280 | if (w[0] == '/') { | |
281 | if (mis.devname) | |
282 | fprintf(stderr, Name ": only give one device per ARRAY line: %s and %s\n", | |
283 | mis.devname, w); | |
284 | else mis.devname = w; | |
285 | } else if (strncasecmp(w, "uuid=", 5)==0 ) { | |
286 | if (mis.uuid_set) | |
287 | fprintf(stderr, Name ": only specify uuid once, %s ignored.\n", | |
288 | w); | |
289 | else { | |
290 | if (parse_uuid(w+5, mis.uuid)) | |
291 | mis.uuid_set = 1; | |
292 | else | |
293 | fprintf(stderr, Name ": bad uuid: %s\n", w); | |
294 | } | |
295 | } else if (strncasecmp(w, "super-minor=", 12)==0 ) { | |
296 | if (mis.super_minor >= 0) | |
297 | fprintf(stderr, Name ": only specify super-minor once, %s ignored.\n", | |
298 | w); | |
299 | else { | |
300 | char *endptr; | |
301 | mis.super_minor= strtol(w+12, &endptr, 10); | |
302 | if (w[12]==0 || endptr[0]!=0 || mis.super_minor < 0) { | |
303 | fprintf(stderr, Name ": invalid super-minor number: %s\n", | |
304 | w); | |
98c6faba | 305 | mis.super_minor = UnSet; |
52826846 NB |
306 | } |
307 | } | |
308 | } else if (strncasecmp(w, "devices=", 8 ) == 0 ) { | |
309 | if (mis.devices) | |
310 | fprintf(stderr, Name ": only specify devices once (use a comma separated list). %s ignored\n", | |
311 | w); | |
312 | else | |
313 | mis.devices = strdup(w+8); | |
314 | } else if (strncasecmp(w, "spare-group=", 12) == 0 ) { | |
315 | if (mis.spare_group) | |
316 | fprintf(stderr, Name ": only specify one spare group per array. %s ignored.\n", | |
317 | w); | |
318 | else | |
319 | mis.spare_group = strdup(w+12); | |
cd29a5c8 NB |
320 | } else if (strncasecmp(w, "level=", 6) == 0 ) { |
321 | /* this is mainly for compatability with --brief output */ | |
322 | mis.level = map_name(pers, w+6); | |
323 | } else if (strncasecmp(w, "disks=", 6) == 0 ) { | |
324 | /* again, for compat */ | |
feb716e9 | 325 | mis.raid_disks = atoi(w+6); |
b83d95f3 NB |
326 | } else if (strncasecmp(w, "num-devices=", 12) == 0 ) { |
327 | /* again, for compat */ | |
feb716e9 NB |
328 | mis.raid_disks = atoi(w+12); |
329 | } else if (strncasecmp(w, "spares=", 7) == 0 ) { | |
330 | /* for warning if not all spares present */ | |
331 | mis.spare_disks = atoi(w+7); | |
dd0781e5 NB |
332 | } else if (strncasecmp(w, "auto=", 5) == 0 ) { |
333 | /* whether to create device special files as needed */ | |
334 | if (strcasecmp(w+5, "no")==0) | |
335 | mis.autof = 0; | |
336 | else if (strcasecmp(w+5,"yes")==0 || strcasecmp(w+5,"md")==0) | |
337 | mis.autof = -1; | |
338 | else { | |
339 | /* There might be digits, and maybe a hypen, at the end */ | |
340 | char *e = w+5 + strlen(w+5); | |
341 | int num = 4; | |
342 | int len; | |
343 | while (e > w+5 && isdigit(e[-1])) | |
344 | e--; | |
345 | if (*e) { | |
346 | num = atoi(e); | |
347 | if (num <= 0) num = 1; | |
348 | } | |
349 | if (e > w+5 && e[-1] == '-') | |
350 | e--; | |
351 | len = e - (w+5); | |
352 | if ((len == 3 && strncasecmp(w+5,"mdp",3)==0) || | |
353 | (len == 1 && strncasecmp(w+5,"p",1)==0) || | |
354 | (len >= 4 && strncasecmp(w+5,"part",4)==0)) | |
355 | mis.autof = num; | |
356 | else | |
357 | fprintf(stderr, Name ": auto type of \"%s\" ignored for %s\n", | |
358 | w+5, mis.devname?mis.devname:"unlabeled-array"); | |
359 | } | |
52826846 NB |
360 | } else { |
361 | fprintf(stderr, Name ": unrecognised word on ARRAY line: %s\n", | |
362 | w); | |
363 | } | |
364 | } | |
365 | if (mis.devname == NULL) | |
dd0781e5 | 366 | fprintf(stderr, Name ": ARRAY line with no device\n"); |
e5329c37 | 367 | else if (mis.uuid_set == 0 && mis.devices == NULL && mis.super_minor == UnSet) |
52826846 NB |
368 | fprintf(stderr, Name ": ARRAY line %s has no identity information.\n", mis.devname); |
369 | else { | |
370 | mi = malloc(sizeof(*mi)); | |
371 | *mi = mis; | |
372 | mi->devname = strdup(mis.devname); | |
373 | mi->next = NULL; | |
374 | *mddevlp = mi; | |
375 | mddevlp = &mi->next; | |
82b27616 | 376 | } |
82b27616 | 377 | } |
e0d19036 NB |
378 | |
379 | static char *alert_email = NULL; | |
380 | void mailline(char *line) | |
381 | { | |
382 | char *w; | |
383 | ||
384 | for (w=dl_next(line); w != line ; w=dl_next(w)) { | |
385 | if (alert_email == NULL) | |
386 | alert_email = strdup(w); | |
387 | else | |
388 | fprintf(stderr, Name ": excess address on MAIL line: %s - ignored\n", | |
389 | w); | |
390 | } | |
391 | } | |
392 | ||
393 | ||
394 | static char *alert_program = NULL; | |
395 | void programline(char *line) | |
396 | { | |
397 | char *w; | |
398 | ||
399 | for (w=dl_next(line); w != line ; w=dl_next(w)) { | |
400 | if (alert_program == NULL) | |
401 | alert_program = strdup(w); | |
402 | else | |
403 | fprintf(stderr, Name ": excess program on PROGRAM line: %s - ignored\n", | |
404 | w); | |
405 | } | |
406 | } | |
407 | ||
408 | ||
82b27616 NB |
409 | int loaded = 0; |
410 | ||
411 | void load_conffile(char *conffile) | |
412 | { | |
52826846 NB |
413 | FILE *f; |
414 | char *line; | |
415 | ||
416 | if (loaded) return; | |
417 | if (conffile == NULL) | |
418 | conffile = DefaultConfFile; | |
419 | ||
d013a55e NB |
420 | if (strcmp(conffile, "none") == 0) { |
421 | loaded = 1; | |
422 | return; | |
423 | } | |
5787fa49 NB |
424 | if (strcmp(conffile, "partitions")==0) { |
425 | load_partitions(); | |
d013a55e | 426 | loaded = 1; |
5787fa49 NB |
427 | return; |
428 | } | |
52826846 NB |
429 | f = fopen(conffile, "r"); |
430 | if (f ==NULL) | |
431 | return; | |
432 | ||
433 | loaded = 1; | |
434 | while ((line=conf_line(f))) { | |
435 | switch(match_keyword(line)) { | |
436 | case 0: /* DEVICE */ | |
437 | devline(line); | |
438 | break; | |
e0d19036 | 439 | case 1: /* ARRAY */ |
52826846 NB |
440 | arrayline(line); |
441 | break; | |
e0d19036 NB |
442 | case 2: /* MAIL */ |
443 | mailline(line); | |
444 | break; | |
445 | case 3: /* PROGRAM */ | |
446 | programline(line); | |
447 | break; | |
52826846 NB |
448 | default: |
449 | fprintf(stderr, Name ": Unknown keyword %s\n", line); | |
450 | } | |
451 | free_line(line); | |
82b27616 | 452 | } |
82b27616 | 453 | |
dd0781e5 | 454 | fclose(f); |
82b27616 NB |
455 | |
456 | /* printf("got file\n"); */ | |
457 | } | |
458 | ||
e0d19036 NB |
459 | char *conf_get_mailaddr(char *conffile) |
460 | { | |
461 | load_conffile(conffile); | |
462 | return alert_email; | |
463 | } | |
464 | ||
465 | char *conf_get_program(char *conffile) | |
466 | { | |
467 | load_conffile(conffile); | |
468 | return alert_program; | |
469 | } | |
470 | ||
82b27616 | 471 | |
52826846 | 472 | mddev_ident_t conf_get_ident(char *conffile, char *dev) |
64c4757e | 473 | { |
52826846 NB |
474 | mddev_ident_t rv; |
475 | load_conffile(conffile); | |
476 | rv = mddevlist; | |
477 | while (dev && rv && strcmp(dev, rv->devname)!=0) | |
478 | rv = rv->next; | |
479 | return rv; | |
64c4757e NB |
480 | } |
481 | ||
482 | mddev_dev_t conf_get_devs(char *conffile) | |
483 | { | |
52826846 NB |
484 | glob_t globbuf; |
485 | struct conf_dev *cd; | |
486 | int flags = 0; | |
487 | static mddev_dev_t dlist = NULL; | |
98c6faba | 488 | unsigned int i; |
52826846 NB |
489 | |
490 | while (dlist) { | |
491 | mddev_dev_t t = dlist; | |
492 | dlist = dlist->next; | |
493 | free(t->devname); | |
494 | free(t); | |
495 | } | |
82b27616 | 496 | |
52826846 | 497 | load_conffile(conffile); |
82b27616 | 498 | |
52826846 NB |
499 | for (cd=cdevlist; cd; cd=cd->next) { |
500 | glob(cd->name, flags, NULL, &globbuf); | |
501 | flags |= GLOB_APPEND; | |
502 | } | |
e0d19036 NB |
503 | if (flags & GLOB_APPEND) { |
504 | for (i=0; i<globbuf.gl_pathc; i++) { | |
505 | mddev_dev_t t = malloc(sizeof(*t)); | |
506 | t->devname = strdup(globbuf.gl_pathv[i]); | |
507 | t->next = dlist; | |
508 | dlist = t; | |
82b27616 | 509 | /* printf("one dev is %s\n", t->devname);*/ |
e0d19036 NB |
510 | } |
511 | globfree(&globbuf); | |
52826846 | 512 | } |
82b27616 | 513 | |
52826846 | 514 | return dlist; |
64c4757e NB |
515 | } |
516 | ||
52826846 NB |
517 | int match_oneof(char *devices, char *devname) |
518 | { | |
519 | /* check if one of the comma separated patterns in devices | |
520 | * matches devname | |
521 | */ | |
522 | ||
523 | ||
524 | while (devices && *devices) { | |
525 | char patn[1024]; | |
526 | char *p = devices; | |
527 | devices = strchr(devices, ','); | |
528 | if (!devices) | |
529 | devices = p + strlen(p); | |
530 | if (devices-p < 1024) { | |
531 | strncpy(patn, p, devices-p); | |
532 | patn[devices-p] = 0; | |
533 | if (fnmatch(patn, devname, FNM_PATHNAME)==0) | |
534 | return 1; | |
535 | } | |
536 | if (*devices == ',') | |
537 | devices++; | |
538 | } | |
539 | return 0; | |
540 | } |