]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - config.c
2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
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.
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.
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
22 * Email: <neilb@cse.unsw.edu.au>
24 * School of Computer Science and Engineering
25 * The University of New South Wales
38 * Read the config file
40 * conf_get_uuids gets a list of devicename+uuid pairs
41 * conf_get_devs gets device names after expanding wildcards
43 * Each keeps the returned list and frees it when asked to make
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.
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.
57 * Keywords are DEVICE and ARRAY
58 * DEV{ICE} introduces some devices that might contain raid components.
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
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
71 #define CONFFILE "/etc/mdadm.conf"
74 /* for Debian compatibility .... */
75 #define CONFFILE2 "/etc/mdadm/mdadm.conf"
77 char DefaultConfFile
[] = CONFFILE
;
78 char DefaultAltConfFile
[] = CONFFILE2
;
80 char *keywords
[] = { "device", "array", "mailaddr", "program", NULL
};
83 * match_keyword returns an index into the keywords array, or -1 for no match
84 * case is ignored, and at least three characters must be given
87 int match_keyword(char *word
)
89 int len
= strlen(word
);
92 if (len
< 3) return -1;
93 for (n
=0; keywords
[n
]; n
++) {
94 if (strncasecmp(word
, keywords
[n
], len
)==0)
100 /* conf_word gets one word from the conf file.
101 * if "allow_key", then accept words at the start of a line,
102 * otherwise stop when such a word is found.
103 * We assume that the file pointer is at the end of a word, so the
104 * next character is a space, or a newline. If not, it is the start of a line.
107 char *conf_word(FILE *file
, int allow_key
)
114 char *word
= malloc(wsize
);
118 while (wordfound
==0) {
119 /* at the end of a word.. */
122 while (c
!= EOF
&& c
!= '\n')
125 if (c
== '\n') continue;
127 if (c
!= ' ' && c
!= '\t' && ! allow_key
) {
131 /* looks like it is safe to get a word here, if there is one */
133 /* first, skip any spaces */
134 while (c
== ' ' || c
== '\t')
136 if (c
!= EOF
&& c
!= '\n' && c
!= '#') {
137 /* we really have a character of a word, so start saving it */
138 while (c
!= EOF
&& c
!= '\n' && (quote
|| (c
!=' ' && c
!= '\t'))) {
140 if (quote
&& c
== quote
) quote
= 0;
141 else if (quote
== 0 && (c
== '\'' || c
== '"'))
144 if (len
== wsize
-1) {
146 word
= realloc(word
, wsize
);
154 if (c
!= EOF
) ungetc(c
, file
);
157 /* printf("word is <%s>\n", word); */
166 * conf_line reads one logical line from the conffile.
167 * It skips comments and continues until it finds a line that starts
168 * with a non blank/comment. This character is pushed back for the next call
169 * A doubly linked list of words is returned.
170 * the first word will be a keyword. Other words will have had quotes removed.
173 char *conf_line(FILE *file
)
178 w
= conf_word(file
, 1);
179 if (w
== NULL
) return NULL
;
185 while ((w
= conf_word(file
,0))){
186 char *w2
= dl_strdup(w
);
190 /* printf("got a line\n");*/
194 void free_line(char *line
)
197 for (w
=dl_next(line
); w
!= line
; w
=dl_next(line
)) {
206 struct conf_dev
*next
;
210 mddev_dev_t
load_partitions(void)
212 FILE *f
= fopen("/proc/partitions", "r");
214 mddev_dev_t rv
= NULL
;
216 fprintf(stderr
, Name
": cannot open /proc/partitions\n");
219 while (fgets(buf
, 1024, f
)) {
227 major
= strtoul(buf
, &mp
, 10);
228 if (mp
== buf
|| *mp
!= ' ')
230 minor
= strtoul(mp
, NULL
, 10);
232 name
= map_dev(major
, minor
);
234 snprintf(buf
, 1024, "%d:%d", major
, minor
);
238 d
= malloc(sizeof(*d
));
239 d
->devname
= strdup(name
);
248 void devline(char *line
)
253 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
254 if (w
[0] == '/' || strcasecmp(w
, "partitions") == 0) {
255 cd
= malloc(sizeof(*cd
));
256 cd
->name
= strdup(w
);
260 fprintf(stderr
, Name
": unreconised word on DEVICE line: %s\n",
266 mddev_ident_t mddevlist
= NULL
;
267 mddev_ident_t
*mddevlp
= &mddevlist
;
269 void arrayline(char *line
)
273 struct mddev_ident_s mis
;
277 mis
.super_minor
= UnSet
;
279 mis
.raid_disks
= UnSet
;
280 mis
.spare_disks
= UnSet
;
283 mis
.spare_group
= NULL
;
290 for (w
=dl_next(line
); w
!=line
; w
=dl_next(w
)) {
293 fprintf(stderr
, Name
": only give one device per ARRAY line: %s and %s\n",
295 else mis
.devname
= w
;
296 } else if (strncasecmp(w
, "uuid=", 5)==0 ) {
298 fprintf(stderr
, Name
": only specify uuid once, %s ignored.\n",
301 if (parse_uuid(w
+5, mis
.uuid
))
304 fprintf(stderr
, Name
": bad uuid: %s\n", w
);
306 } else if (strncasecmp(w
, "super-minor=", 12)==0 ) {
307 if (mis
.super_minor
!= UnSet
)
308 fprintf(stderr
, Name
": only specify super-minor once, %s ignored.\n",
312 mis
.super_minor
= strtol(w
+12, &endptr
, 10);
313 if (w
[12]==0 || endptr
[0]!=0 || mis
.super_minor
< 0) {
314 fprintf(stderr
, Name
": invalid super-minor number: %s\n",
316 mis
.super_minor
= UnSet
;
319 } else if (strncasecmp(w
, "name=", 5)==0) {
321 fprintf(stderr
, Name
": only specify name once, %s ignored.\n",
323 else if (strlen(w
+5) > 32)
324 fprintf(stderr
, Name
": name too long, ignoring %s\n", w
);
326 strcpy(mis
.name
, w
+5);
328 } else if (strncasecmp(w
, "devices=", 8 ) == 0 ) {
330 fprintf(stderr
, Name
": only specify devices once (use a comma separated list). %s ignored\n",
333 mis
.devices
= strdup(w
+8);
334 } else if (strncasecmp(w
, "spare-group=", 12) == 0 ) {
336 fprintf(stderr
, Name
": only specify one spare group per array. %s ignored.\n",
339 mis
.spare_group
= strdup(w
+12);
340 } else if (strncasecmp(w
, "level=", 6) == 0 ) {
341 /* this is mainly for compatability with --brief output */
342 mis
.level
= map_name(pers
, w
+6);
343 } else if (strncasecmp(w
, "disks=", 6) == 0 ) {
344 /* again, for compat */
345 mis
.raid_disks
= atoi(w
+6);
346 } else if (strncasecmp(w
, "num-devices=", 12) == 0 ) {
347 /* again, for compat */
348 mis
.raid_disks
= atoi(w
+12);
349 } else if (strncasecmp(w
, "spares=", 7) == 0 ) {
350 /* for warning if not all spares present */
351 mis
.spare_disks
= atoi(w
+7);
352 } else if (strncasecmp(w
, "metadata=", 9) == 0) {
353 /* style of metadata on the devices. */
356 for(i
=0; superlist
[i
] && !mis
.st
; i
++)
357 mis
.st
= superlist
[i
]->match_metadata_desc(w
+9);
360 fprintf(stderr
, Name
": metadata format %s unknown, ignored.\n", w
+9);
361 } else if (strncasecmp(w
, "auto=", 5) == 0 ) {
362 /* whether to create device special files as needed */
363 if (strcasecmp(w
+5, "no")==0)
365 else if (strcasecmp(w
+5,"yes")==0 || strcasecmp(w
+5,"md")==0)
368 /* There might be digits, and maybe a hyphen, at the end */
369 char *e
= w
+5 + strlen(w
+5);
372 while (e
> w
+5 && isdigit(e
[-1]))
376 if (num
<= 0) num
= 1;
378 if (e
> w
+5 && e
[-1] == '-')
381 if ((len
== 3 && strncasecmp(w
+5,"mdp",3)==0) ||
382 (len
== 1 && strncasecmp(w
+5,"p",1)==0) ||
383 (len
>= 4 && strncasecmp(w
+5,"part",4)==0))
386 fprintf(stderr
, Name
": auto type of \"%s\" ignored for %s\n",
387 w
+5, mis
.devname
?mis
.devname
:"unlabeled-array");
390 fprintf(stderr
, Name
": unrecognised word on ARRAY line: %s\n",
394 if (mis
.devname
== NULL
)
395 fprintf(stderr
, Name
": ARRAY line with no device\n");
396 else if (mis
.uuid_set
== 0 && mis
.devices
== NULL
&& mis
.super_minor
== UnSet
&& mis
.name
[0] == 0)
397 fprintf(stderr
, Name
": ARRAY line %s has no identity information.\n", mis
.devname
);
399 mi
= malloc(sizeof(*mi
));
401 mi
->devname
= strdup(mis
.devname
);
408 static char *alert_email
= NULL
;
409 void mailline(char *line
)
413 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
414 if (alert_email
== NULL
)
415 alert_email
= strdup(w
);
417 fprintf(stderr
, Name
": excess address on MAIL line: %s - ignored\n",
423 static char *alert_program
= NULL
;
424 void programline(char *line
)
428 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
429 if (alert_program
== NULL
)
430 alert_program
= strdup(w
);
432 fprintf(stderr
, Name
": excess program on PROGRAM line: %s - ignored\n",
440 void load_conffile(char *conffile
)
446 if (conffile
== NULL
)
447 conffile
= DefaultConfFile
;
449 if (strcmp(conffile
, "none") == 0) {
453 if (strcmp(conffile
, "partitions")==0) {
454 char *list
= dl_strdup("DEV");
456 dl_add(list
, dl_strdup("partitions"));
462 f
= fopen(conffile
, "r");
463 /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
464 * To allow Debian users to compile from clean source and still
465 * have a working mdadm, we read /etc/mdadm/mdadm.conf
466 * if /etc/mdadm.conf doesn't exist
469 conffile
== DefaultConfFile
) {
470 f
= fopen(DefaultAltConfFile
, "r");
472 conffile
= DefaultAltConfFile
;
478 while ((line
=conf_line(f
))) {
479 switch(match_keyword(line
)) {
489 case 3: /* PROGRAM */
493 fprintf(stderr
, Name
": Unknown keyword %s\n", line
);
500 /* printf("got file\n"); */
503 char *conf_get_mailaddr(char *conffile
)
505 load_conffile(conffile
);
509 char *conf_get_program(char *conffile
)
511 load_conffile(conffile
);
512 return alert_program
;
516 mddev_ident_t
conf_get_ident(char *conffile
, char *dev
)
519 load_conffile(conffile
);
521 while (dev
&& rv
&& strcmp(dev
, rv
->devname
)!=0)
526 mddev_dev_t
conf_get_devs(char *conffile
)
531 static mddev_dev_t dlist
= NULL
;
535 mddev_dev_t t
= dlist
;
541 load_conffile(conffile
);
543 for (cd
=cdevlist
; cd
; cd
=cd
->next
) {
544 if (strcasecmp(cd
->name
, "partitions")==0 && dlist
== NULL
)
545 dlist
= load_partitions();
547 glob(cd
->name
, flags
, NULL
, &globbuf
);
548 flags
|= GLOB_APPEND
;
551 if (flags
& GLOB_APPEND
) {
552 for (i
=0; i
<globbuf
.gl_pathc
; i
++) {
553 mddev_dev_t t
= malloc(sizeof(*t
));
554 t
->devname
= strdup(globbuf
.gl_pathv
[i
]);
557 /* printf("one dev is %s\n", t->devname);*/
565 int match_oneof(char *devices
, char *devname
)
567 /* check if one of the comma separated patterns in devices
572 while (devices
&& *devices
) {
575 devices
= strchr(devices
, ',');
577 devices
= p
+ strlen(p
);
578 if (devices
-p
< 1024) {
579 strncpy(patn
, p
, devices
-p
);
581 if (fnmatch(patn
, devname
, FNM_PATHNAME
)==0)