]>
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
37 * Read the config file
39 * conf_get_uuids gets a list of devicename+uuid pairs
40 * conf_get_devs gets device names after expanding wildcards
42 * Each keeps the returned list and frees it when asked to make
45 * The format of the config file needs to be fairly extensible.
46 * Now, arrays only have names and uuids and devices merely are.
47 * But later arrays might want names, and devices might want superblock
48 * versions, and who knows what else.
49 * I like free format, abhore backslash line continuation, adore
50 * indentation for structure and am ok about # comments.
52 * So, each line that isn't blank or a #comment must either start
53 * with a key word, and not be indented, or must start with a
54 * non-key-word and must be indented.
56 * Keywords are DEVICE and ARRAY
57 * DEV{ICE} introduces some devices that might contain raid components.
59 * DEV style=0 /dev/sda* /dev/hd*
60 * DEV style=1 /dev/sd[b-f]*
61 * ARR{AY} describes an array giving md device and attributes like uuid=whatever
63 * ARRAY /dev/md0 uuid=whatever name=something
64 * Spaces separate words on each line. Quoting, with "" or '' protects them,
65 * but may not wrap over lines
70 #define CONFFILE "/etc/mdadm.conf"
72 char DefaultConfFile
[] = CONFFILE
;
74 char *keywords
[] = { "device", "array", "mailaddr", "program", NULL
};
77 * match_keyword returns an index into the keywords array, or -1 for no match
78 * case is ignored, and at least three characters must be given
81 int match_keyword(char *word
)
83 int len
= strlen(word
);
86 if (len
< 3) return -1;
87 for (n
=0; keywords
[n
]; n
++) {
88 if (strncasecmp(word
, keywords
[n
], len
)==0)
94 /* conf_word gets one word from the conf file.
95 * if "allow_key", then accept words at the start of a line,
96 * otherwise stop when such a word is found.
97 * We assume that the file pointer is at the end of a word, so the
98 * next character is a space, or a newline. If not, it is the start of a line.
101 char *conf_word(FILE *file
, int allow_key
)
108 char *word
= malloc(wsize
);
112 while (wordfound
==0) {
113 /* at the end of a word.. */
116 while (c
!= EOF
&& c
!= '\n')
119 if (c
== '\n') continue;
121 if (c
!= ' ' && c
!= '\t' && ! allow_key
) {
125 /* looks like it is safe to get a word here, if there is one */
127 /* first, skip any spaces */
128 while (c
== ' ' || c
== '\t')
130 if (c
!= EOF
&& c
!= '\n' && c
!= '#') {
131 /* we really have a character of a word, so start saving it */
132 while (c
!= EOF
&& c
!= '\n' && (quote
|| (c
!=' ' && c
!= '\t'))) {
134 if (quote
&& c
== quote
) quote
= 0;
135 else if (quote
== 0 && (c
== '\'' || c
== '"'))
138 if (len
== wsize
-1) {
140 word
= realloc(word
, wsize
);
148 if (c
!= EOF
) ungetc(c
, file
);
151 /* printf("word is <%s>\n", word); */
160 * conf_line reads one logical line from the conffile.
161 * It skips comments and continues until it finds a line that starts
162 * with a non blank/comment. This character is pushed back for the next call
163 * A doubly linked list of words is returned.
164 * the first word will be a keyword. Other words will have had quotes removed.
167 char *conf_line(FILE *file
)
172 w
= conf_word(file
, 1);
173 if (w
== NULL
) return NULL
;
179 while ((w
= conf_word(file
,0))){
180 char *w2
= dl_strdup(w
);
184 /* printf("got a line\n");*/
188 void free_line(char *line
)
191 for (w
=dl_next(line
); w
!= line
; w
=dl_next(line
)) {
200 struct conf_dev
*next
;
204 void load_partitions(void)
206 FILE *f
= fopen("/proc/partitions", "r");
209 fprintf(stderr
, Name
": cannot open /proc/partitions\n");
212 while (fgets(buf
, 1024, f
)) {
218 if (sscanf(buf
, " %d %d ", &major
, &minor
) != 2)
220 name
= map_dev(major
, minor
);
224 cd
= malloc(sizeof(*cd
));
225 cd
->name
= strdup(name
);
233 void devline(char *line
)
238 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
240 cd
= malloc(sizeof(*cd
));
241 cd
->name
= strdup(w
);
244 } else if (strcasecmp(w
, "partitions") == 0) {
245 /* read /proc/partitions, and look major/minor up in /dev */
248 fprintf(stderr
, Name
": unreconised word on DEVICE line: %s\n",
254 mddev_ident_t mddevlist
= NULL
;
255 mddev_ident_t
*mddevlp
= &mddevlist
;
257 void arrayline(char *line
)
261 struct mddev_ident_s mis
;
265 mis
.super_minor
= -1;
270 mis
.spare_group
= NULL
;
272 for (w
=dl_next(line
); w
!=line
; w
=dl_next(w
)) {
275 fprintf(stderr
, Name
": only give one device per ARRAY line: %s and %s\n",
277 else mis
.devname
= w
;
278 } else if (strncasecmp(w
, "uuid=", 5)==0 ) {
280 fprintf(stderr
, Name
": only specify uuid once, %s ignored.\n",
283 if (parse_uuid(w
+5, mis
.uuid
))
286 fprintf(stderr
, Name
": bad uuid: %s\n", w
);
288 } else if (strncasecmp(w
, "super-minor=", 12)==0 ) {
289 if (mis
.super_minor
>= 0)
290 fprintf(stderr
, Name
": only specify super-minor once, %s ignored.\n",
294 mis
.super_minor
= strtol(w
+12, &endptr
, 10);
295 if (w
[12]==0 || endptr
[0]!=0 || mis
.super_minor
< 0) {
296 fprintf(stderr
, Name
": invalid super-minor number: %s\n",
298 mis
.super_minor
= -1;
301 } else if (strncasecmp(w
, "devices=", 8 ) == 0 ) {
303 fprintf(stderr
, Name
": only specify devices once (use a comma separated list). %s ignored\n",
306 mis
.devices
= strdup(w
+8);
307 } else if (strncasecmp(w
, "spare-group=", 12) == 0 ) {
309 fprintf(stderr
, Name
": only specify one spare group per array. %s ignored.\n",
312 mis
.spare_group
= strdup(w
+12);
313 } else if (strncasecmp(w
, "level=", 6) == 0 ) {
314 /* this is mainly for compatability with --brief output */
315 mis
.level
= map_name(pers
, w
+6);
316 } else if (strncasecmp(w
, "disks=", 6) == 0 ) {
317 /* again, for compat */
318 mis
.raid_disks
= atoi(w
+6);
319 } else if (strncasecmp(w
, "num-devices=", 12) == 0 ) {
320 /* again, for compat */
321 mis
.raid_disks
= atoi(w
+12);
323 fprintf(stderr
, Name
": unrecognised word on ARRAY line: %s\n",
327 if (mis
.devname
== NULL
)
328 fprintf(stderr
, Name
": ARRAY line with a device\n");
329 else if (mis
.uuid_set
== 0 && mis
.devices
== NULL
&& mis
.super_minor
< 0)
330 fprintf(stderr
, Name
": ARRAY line %s has no identity information.\n", mis
.devname
);
332 mi
= malloc(sizeof(*mi
));
334 mi
->devname
= strdup(mis
.devname
);
341 static char *alert_email
= NULL
;
342 void mailline(char *line
)
346 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
347 if (alert_email
== NULL
)
348 alert_email
= strdup(w
);
350 fprintf(stderr
, Name
": excess address on MAIL line: %s - ignored\n",
356 static char *alert_program
= NULL
;
357 void programline(char *line
)
361 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
362 if (alert_program
== NULL
)
363 alert_program
= strdup(w
);
365 fprintf(stderr
, Name
": excess program on PROGRAM line: %s - ignored\n",
373 void load_conffile(char *conffile
)
379 if (conffile
== NULL
)
380 conffile
= DefaultConfFile
;
382 if (strcmp(conffile
, "none") == 0) {
386 if (strcmp(conffile
, "partitions")==0) {
391 f
= fopen(conffile
, "r");
396 while ((line
=conf_line(f
))) {
397 switch(match_keyword(line
)) {
407 case 3: /* PROGRAM */
411 fprintf(stderr
, Name
": Unknown keyword %s\n", line
);
417 /* printf("got file\n"); */
420 char *conf_get_mailaddr(char *conffile
)
422 load_conffile(conffile
);
426 char *conf_get_program(char *conffile
)
428 load_conffile(conffile
);
429 return alert_program
;
433 mddev_ident_t
conf_get_ident(char *conffile
, char *dev
)
436 load_conffile(conffile
);
438 while (dev
&& rv
&& strcmp(dev
, rv
->devname
)!=0)
443 mddev_dev_t
conf_get_devs(char *conffile
)
448 static mddev_dev_t dlist
= NULL
;
452 mddev_dev_t t
= dlist
;
458 load_conffile(conffile
);
460 for (cd
=cdevlist
; cd
; cd
=cd
->next
) {
461 glob(cd
->name
, flags
, NULL
, &globbuf
);
462 flags
|= GLOB_APPEND
;
464 if (flags
& GLOB_APPEND
) {
465 for (i
=0; i
<globbuf
.gl_pathc
; i
++) {
466 mddev_dev_t t
= malloc(sizeof(*t
));
467 t
->devname
= strdup(globbuf
.gl_pathv
[i
]);
470 /* printf("one dev is %s\n", t->devname);*/
478 int match_oneof(char *devices
, char *devname
)
480 /* check if one of the comma separated patterns in devices
485 while (devices
&& *devices
) {
488 devices
= strchr(devices
, ',');
490 devices
= p
+ strlen(p
);
491 if (devices
-p
< 1024) {
492 strncpy(patn
, p
, devices
-p
);
494 if (fnmatch(patn
, devname
, FNM_PATHNAME
)==0)