]>
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"
73 char DefaultConfFile
[] = CONFFILE
;
75 char *keywords
[] = { "device", "array", "mailaddr", "program", NULL
};
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
82 int match_keyword(char *word
)
84 int len
= strlen(word
);
87 if (len
< 3) return -1;
88 for (n
=0; keywords
[n
]; n
++) {
89 if (strncasecmp(word
, keywords
[n
], len
)==0)
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.
102 char *conf_word(FILE *file
, int allow_key
)
109 char *word
= malloc(wsize
);
113 while (wordfound
==0) {
114 /* at the end of a word.. */
117 while (c
!= EOF
&& c
!= '\n')
120 if (c
== '\n') continue;
122 if (c
!= ' ' && c
!= '\t' && ! allow_key
) {
126 /* looks like it is safe to get a word here, if there is one */
128 /* first, skip any spaces */
129 while (c
== ' ' || c
== '\t')
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'))) {
135 if (quote
&& c
== quote
) quote
= 0;
136 else if (quote
== 0 && (c
== '\'' || c
== '"'))
139 if (len
== wsize
-1) {
141 word
= realloc(word
, wsize
);
149 if (c
!= EOF
) ungetc(c
, file
);
152 /* printf("word is <%s>\n", word); */
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.
168 char *conf_line(FILE *file
)
173 w
= conf_word(file
, 1);
174 if (w
== NULL
) return NULL
;
180 while ((w
= conf_word(file
,0))){
181 char *w2
= dl_strdup(w
);
185 /* printf("got a line\n");*/
189 void free_line(char *line
)
192 for (w
=dl_next(line
); w
!= line
; w
=dl_next(line
)) {
201 struct conf_dev
*next
;
205 void load_partitions(void)
207 FILE *f
= fopen("/proc/partitions", "r");
210 fprintf(stderr
, Name
": cannot open /proc/partitions\n");
213 while (fgets(buf
, 1024, f
)) {
219 major
= strtoul(buf
, &mp
, 10);
220 if (mp
== buf
|| *mp
!= ' ')
222 minor
= strtoul(mp
, NULL
, 10);
224 name
= map_dev(major
, minor
);
228 cd
= malloc(sizeof(*cd
));
229 cd
->name
= strdup(name
);
238 void devline(char *line
)
243 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
245 cd
= malloc(sizeof(*cd
));
246 cd
->name
= strdup(w
);
249 } else if (strcasecmp(w
, "partitions") == 0) {
250 /* read /proc/partitions, and look major/minor up in /dev */
253 fprintf(stderr
, Name
": unreconised word on DEVICE line: %s\n",
259 mddev_ident_t mddevlist
= NULL
;
260 mddev_ident_t
*mddevlp
= &mddevlist
;
262 void arrayline(char *line
)
266 struct mddev_ident_s mis
;
270 mis
.super_minor
= UnSet
;
272 mis
.raid_disks
= UnSet
;
273 mis
.spare_disks
= UnSet
;
276 mis
.spare_group
= NULL
;
279 for (w
=dl_next(line
); w
!=line
; w
=dl_next(w
)) {
282 fprintf(stderr
, Name
": only give one device per ARRAY line: %s and %s\n",
284 else mis
.devname
= w
;
285 } else if (strncasecmp(w
, "uuid=", 5)==0 ) {
287 fprintf(stderr
, Name
": only specify uuid once, %s ignored.\n",
290 if (parse_uuid(w
+5, mis
.uuid
))
293 fprintf(stderr
, Name
": bad uuid: %s\n", w
);
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",
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",
305 mis
.super_minor
= UnSet
;
308 } else if (strncasecmp(w
, "devices=", 8 ) == 0 ) {
310 fprintf(stderr
, Name
": only specify devices once (use a comma separated list). %s ignored\n",
313 mis
.devices
= strdup(w
+8);
314 } else if (strncasecmp(w
, "spare-group=", 12) == 0 ) {
316 fprintf(stderr
, Name
": only specify one spare group per array. %s ignored.\n",
319 mis
.spare_group
= strdup(w
+12);
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 */
325 mis
.raid_disks
= atoi(w
+6);
326 } else if (strncasecmp(w
, "num-devices=", 12) == 0 ) {
327 /* again, for compat */
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);
332 } else if (strncasecmp(w
, "auto=", 5) == 0 ) {
333 /* whether to create device special files as needed */
334 if (strcasecmp(w
+5, "no")==0)
336 else if (strcasecmp(w
+5,"yes")==0 || strcasecmp(w
+5,"md")==0)
339 /* There might be digits, and maybe a hypen, at the end */
340 char *e
= w
+5 + strlen(w
+5);
343 while (e
> w
+5 && isdigit(e
[-1]))
347 if (num
<= 0) num
= 1;
349 if (e
> w
+5 && e
[-1] == '-')
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))
357 fprintf(stderr
, Name
": auto type of \"%s\" ignored for %s\n",
358 w
+5, mis
.devname
?mis
.devname
:"unlabeled-array");
361 fprintf(stderr
, Name
": unrecognised word on ARRAY line: %s\n",
365 if (mis
.devname
== NULL
)
366 fprintf(stderr
, Name
": ARRAY line with no device\n");
367 else if (mis
.uuid_set
== 0 && mis
.devices
== NULL
&& mis
.super_minor
== UnSet
)
368 fprintf(stderr
, Name
": ARRAY line %s has no identity information.\n", mis
.devname
);
370 mi
= malloc(sizeof(*mi
));
372 mi
->devname
= strdup(mis
.devname
);
379 static char *alert_email
= NULL
;
380 void mailline(char *line
)
384 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
385 if (alert_email
== NULL
)
386 alert_email
= strdup(w
);
388 fprintf(stderr
, Name
": excess address on MAIL line: %s - ignored\n",
394 static char *alert_program
= NULL
;
395 void programline(char *line
)
399 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
400 if (alert_program
== NULL
)
401 alert_program
= strdup(w
);
403 fprintf(stderr
, Name
": excess program on PROGRAM line: %s - ignored\n",
411 void load_conffile(char *conffile
)
417 if (conffile
== NULL
)
418 conffile
= DefaultConfFile
;
420 if (strcmp(conffile
, "none") == 0) {
424 if (strcmp(conffile
, "partitions")==0) {
429 f
= fopen(conffile
, "r");
434 while ((line
=conf_line(f
))) {
435 switch(match_keyword(line
)) {
445 case 3: /* PROGRAM */
449 fprintf(stderr
, Name
": Unknown keyword %s\n", line
);
456 /* printf("got file\n"); */
459 char *conf_get_mailaddr(char *conffile
)
461 load_conffile(conffile
);
465 char *conf_get_program(char *conffile
)
467 load_conffile(conffile
);
468 return alert_program
;
472 mddev_ident_t
conf_get_ident(char *conffile
, char *dev
)
475 load_conffile(conffile
);
477 while (dev
&& rv
&& strcmp(dev
, rv
->devname
)!=0)
482 mddev_dev_t
conf_get_devs(char *conffile
)
487 static mddev_dev_t dlist
= NULL
;
491 mddev_dev_t t
= dlist
;
497 load_conffile(conffile
);
499 for (cd
=cdevlist
; cd
; cd
=cd
->next
) {
500 glob(cd
->name
, flags
, NULL
, &globbuf
);
501 flags
|= GLOB_APPEND
;
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
]);
509 /* printf("one dev is %s\n", t->devname);*/
517 int match_oneof(char *devices
, char *devname
)
519 /* check if one of the comma separated patterns in devices
524 while (devices
&& *devices
) {
527 devices
= strchr(devices
, ',');
529 devices
= p
+ strlen(p
);
530 if (devices
-p
< 1024) {
531 strncpy(patn
, p
, devices
-p
);
533 if (fnmatch(patn
, devname
, FNM_PATHNAME
)==0)