]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - config.c
269eb11c899ef709536b84b7d49f7b15ec893b90
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
40 * Read the config file
42 * conf_get_uuids gets a list of devicename+uuid pairs
43 * conf_get_devs gets device names after expanding wildcards
45 * Each keeps the returned list and frees it when asked to make
48 * The format of the config file needs to be fairly extensible.
49 * Now, arrays only have names and uuids and devices merely are.
50 * But later arrays might want names, and devices might want superblock
51 * versions, and who knows what else.
52 * I like free format, abhore backslash line continuation, adore
53 * indentation for structure and am ok about # comments.
55 * So, each line that isn't blank or a #comment must either start
56 * with a key word, and not be indented, or must start with a
57 * non-key-word and must be indented.
59 * Keywords are DEVICE and ARRAY
60 * DEV{ICE} introduces some devices that might contain raid components.
62 * DEV style=0 /dev/sda* /dev/hd*
63 * DEV style=1 /dev/sd[b-f]*
64 * ARR{AY} describes an array giving md device and attributes like uuid=whatever
66 * ARRAY /dev/md0 uuid=whatever name=something
67 * Spaces separate words on each line. Quoting, with "" or '' protects them,
68 * but may not wrap over lines
73 #define CONFFILE "/etc/mdadm.conf"
76 /* for Debian compatibility .... */
77 #define CONFFILE2 "/etc/mdadm/mdadm.conf"
79 char DefaultConfFile
[] = CONFFILE
;
80 char DefaultAltConfFile
[] = CONFFILE2
;
82 char *keywords
[] = { "devices", "array",
83 "mailaddr", "program", "mailfrom",
88 * match_keyword returns an index into the keywords array, or -1 for no match
89 * case is ignored, and at least three characters must be given
92 int match_keyword(char *word
)
94 int len
= strlen(word
);
97 if (len
< 3) return -1;
98 for (n
=0; keywords
[n
]; n
++) {
99 if (strncasecmp(word
, keywords
[n
], len
)==0)
105 /* conf_word gets one word from the conf file.
106 * if "allow_key", then accept words at the start of a line,
107 * otherwise stop when such a word is found.
108 * We assume that the file pointer is at the end of a word, so the
109 * next character is a space, or a newline. If not, it is the start of a line.
112 char *conf_word(FILE *file
, int allow_key
)
119 char *word
= malloc(wsize
);
123 while (wordfound
==0) {
124 /* at the end of a word.. */
127 while (c
!= EOF
&& c
!= '\n')
130 if (c
== '\n') continue;
132 if (c
!= ' ' && c
!= '\t' && ! allow_key
) {
136 /* looks like it is safe to get a word here, if there is one */
138 /* first, skip any spaces */
139 while (c
== ' ' || c
== '\t')
141 if (c
!= EOF
&& c
!= '\n' && c
!= '#') {
142 /* we really have a character of a word, so start saving it */
143 while (c
!= EOF
&& c
!= '\n' && (quote
|| (c
!=' ' && c
!= '\t'))) {
145 if (quote
&& c
== quote
) quote
= 0;
146 else if (quote
== 0 && (c
== '\'' || c
== '"'))
149 if (len
== wsize
-1) {
151 word
= realloc(word
, wsize
);
159 if (c
!= EOF
) ungetc(c
, file
);
162 /* printf("word is <%s>\n", word); */
171 * conf_line reads one logical line from the conffile.
172 * It skips comments and continues until it finds a line that starts
173 * with a non blank/comment. This character is pushed back for the next call
174 * A doubly linked list of words is returned.
175 * the first word will be a keyword. Other words will have had quotes removed.
178 char *conf_line(FILE *file
)
183 w
= conf_word(file
, 1);
184 if (w
== NULL
) return NULL
;
190 while ((w
= conf_word(file
,0))){
191 char *w2
= dl_strdup(w
);
195 /* printf("got a line\n");*/
199 void free_line(char *line
)
202 for (w
=dl_next(line
); w
!= line
; w
=dl_next(line
)) {
211 struct conf_dev
*next
;
215 mddev_dev_t
load_partitions(void)
217 FILE *f
= fopen("/proc/partitions", "r");
219 mddev_dev_t rv
= NULL
;
221 fprintf(stderr
, Name
": cannot open /proc/partitions\n");
224 while (fgets(buf
, 1024, f
)) {
232 major
= strtoul(buf
, &mp
, 10);
233 if (mp
== buf
|| *mp
!= ' ')
235 minor
= strtoul(mp
, NULL
, 10);
237 name
= map_dev(major
, minor
, 1);
239 d
= malloc(sizeof(*d
));
240 d
->devname
= strdup(name
);
248 struct createinfo createinfo
= {
257 int parse_auto(char *str
, char *msg
, int config
)
260 if (str
== NULL
|| *str
== 0)
262 else if (strcasecmp(str
,"no")==0)
264 else if (strcasecmp(str
,"yes")==0)
266 else if (strcasecmp(str
,"md")==0)
269 /* There might be digits, and maybe a hypen, at the end */
270 char *e
= str
+ strlen(str
);
273 while (e
> str
&& isdigit(e
[-1]))
277 if (num
<= 0) num
= 1;
279 if (e
> str
&& e
[-1] == '-')
282 if ((len
== 2 && strncasecmp(str
,"md",2)==0)) {
283 autof
= config
? 5 : 3;
284 } else if ((len
== 3 && strncasecmp(str
,"mdp",3)==0)) {
285 autof
= config
? 6 : 4;
286 } else if ((len
== 1 && strncasecmp(str
,"p",1)==0) ||
287 (len
>= 4 && strncasecmp(str
,"part",4)==0)) {
290 fprintf(stderr
, Name
": %s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
291 " optionally followed by a number.\n",
300 static void createline(char *line
)
305 for (w
=dl_next(line
); w
!=line
; w
=dl_next(w
)) {
306 if (strncasecmp(w
, "auto=", 5) == 0)
307 createinfo
.autof
= parse_auto(w
+5, "auto=", 1);
308 else if (strncasecmp(w
, "owner=", 6) == 0) {
310 fprintf(stderr
, Name
": missing owner name\n");
313 createinfo
.uid
= strtoul(w
+6, &ep
, 10);
320 createinfo
.uid
= pw
->pw_uid
;
323 fprintf(stderr
, Name
": CREATE user %s not found\n", w
+6);
325 } else if (strncasecmp(w
, "group=", 6) == 0) {
327 fprintf(stderr
, Name
": missing group name\n");
330 createinfo
.gid
= strtoul(w
+6, &ep
, 10);
337 createinfo
.gid
= gr
->gr_gid
;
340 fprintf(stderr
, Name
": CREATE group %s not found\n", w
+6);
342 } else if (strncasecmp(w
, "mode=", 5) == 0) {
344 fprintf(stderr
, Name
": missing CREATE mode\n");
347 createinfo
.mode
= strtoul(w
+5, &ep
, 8);
349 createinfo
.mode
= 0600;
350 fprintf(stderr
, Name
": unrecognised CREATE mode %s\n",
354 fprintf(stderr
, Name
": unrecognised word on CREATE line: %s\n",
360 void devline(char *line
)
365 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
366 if (w
[0] == '/' || strcasecmp(w
, "partitions") == 0) {
367 cd
= malloc(sizeof(*cd
));
368 cd
->name
= strdup(w
);
372 fprintf(stderr
, Name
": unreconised word on DEVICE line: %s\n",
378 mddev_ident_t mddevlist
= NULL
;
379 mddev_ident_t
*mddevlp
= &mddevlist
;
381 void arrayline(char *line
)
385 struct mddev_ident_s mis
;
389 mis
.super_minor
= UnSet
;
391 mis
.raid_disks
= UnSet
;
395 mis
.spare_group
= NULL
;
400 mis
.bitmap_file
= NULL
;
403 for (w
=dl_next(line
); w
!=line
; w
=dl_next(w
)) {
406 fprintf(stderr
, Name
": only give one device per ARRAY line: %s and %s\n",
408 else mis
.devname
= w
;
409 } else if (strncasecmp(w
, "uuid=", 5)==0 ) {
411 fprintf(stderr
, Name
": only specify uuid once, %s ignored.\n",
414 if (parse_uuid(w
+5, mis
.uuid
))
417 fprintf(stderr
, Name
": bad uuid: %s\n", w
);
419 } else if (strncasecmp(w
, "super-minor=", 12)==0 ) {
420 if (mis
.super_minor
!= UnSet
)
421 fprintf(stderr
, Name
": only specify super-minor once, %s ignored.\n",
425 mis
.super_minor
= strtol(w
+12, &endptr
, 10);
426 if (w
[12]==0 || endptr
[0]!=0 || mis
.super_minor
< 0) {
427 fprintf(stderr
, Name
": invalid super-minor number: %s\n",
429 mis
.super_minor
= UnSet
;
432 } else if (strncasecmp(w
, "name=", 5)==0) {
434 fprintf(stderr
, Name
": only specify name once, %s ignored.\n",
436 else if (strlen(w
+5) > 32)
437 fprintf(stderr
, Name
": name too long, ignoring %s\n", w
);
439 strcpy(mis
.name
, w
+5);
441 } else if (strncasecmp(w
, "bitmap=", 7) == 0) {
443 fprintf(stderr
, Name
": only specify bitmap file once. %s ignored\n",
446 mis
.bitmap_file
= w
+7;
448 } else if (strncasecmp(w
, "devices=", 8 ) == 0 ) {
450 fprintf(stderr
, Name
": only specify devices once (use a comma separated list). %s ignored\n",
453 mis
.devices
= strdup(w
+8);
454 } else if (strncasecmp(w
, "spare-group=", 12) == 0 ) {
456 fprintf(stderr
, Name
": only specify one spare group per array. %s ignored.\n",
459 mis
.spare_group
= strdup(w
+12);
460 } else if (strncasecmp(w
, "level=", 6) == 0 ) {
461 /* this is mainly for compatability with --brief output */
462 mis
.level
= map_name(pers
, w
+6);
463 } else if (strncasecmp(w
, "disks=", 6) == 0 ) {
464 /* again, for compat */
465 mis
.raid_disks
= atoi(w
+6);
466 } else if (strncasecmp(w
, "num-devices=", 12) == 0 ) {
467 /* again, for compat */
468 mis
.raid_disks
= atoi(w
+12);
469 } else if (strncasecmp(w
, "spares=", 7) == 0 ) {
470 /* for warning if not all spares present */
471 mis
.spare_disks
= atoi(w
+7);
472 } else if (strncasecmp(w
, "metadata=", 9) == 0) {
473 /* style of metadata on the devices. */
476 for(i
=0; superlist
[i
] && !mis
.st
; i
++)
477 mis
.st
= superlist
[i
]->match_metadata_desc(w
+9);
480 fprintf(stderr
, Name
": metadata format %s unknown, ignored.\n", w
+9);
481 } else if (strncasecmp(w
, "auto=", 5) == 0 ) {
482 /* whether to create device special files as needed */
483 mis
.autof
= parse_auto(w
+5, "auto type", 0);
485 fprintf(stderr
, Name
": unrecognised word on ARRAY line: %s\n",
489 if (mis
.devname
== NULL
)
490 fprintf(stderr
, Name
": ARRAY line with no device\n");
491 else if (mis
.uuid_set
== 0 && mis
.devices
== NULL
&& mis
.super_minor
== UnSet
&& mis
.name
[0] == 0)
492 fprintf(stderr
, Name
": ARRAY line %s has no identity information.\n", mis
.devname
);
494 mi
= malloc(sizeof(*mi
));
496 mi
->devname
= strdup(mis
.devname
);
503 static char *alert_email
= NULL
;
504 void mailline(char *line
)
508 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
509 if (alert_email
== NULL
)
510 alert_email
= strdup(w
);
512 fprintf(stderr
, Name
": excess address on MAIL line: %s - ignored\n",
517 static char *alert_mail_from
= NULL
;
518 void mailfromline(char *line
)
522 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
523 if (alert_mail_from
== NULL
)
524 alert_mail_from
= strdup(w
);
527 asprintf(&t
, "%s %s", alert_mail_from
, w
);
528 free(alert_mail_from
);
535 static char *alert_program
= NULL
;
536 void programline(char *line
)
540 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
541 if (alert_program
== NULL
)
542 alert_program
= strdup(w
);
544 fprintf(stderr
, Name
": excess program on PROGRAM line: %s - ignored\n",
552 void load_conffile(char *conffile
)
558 if (conffile
== NULL
)
559 conffile
= DefaultConfFile
;
561 if (strcmp(conffile
, "none") == 0) {
565 if (strcmp(conffile
, "partitions")==0) {
566 char *list
= dl_strdup("DEV");
568 dl_add(list
, dl_strdup("partitions"));
574 f
= fopen(conffile
, "r");
575 /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
576 * To allow Debian users to compile from clean source and still
577 * have a working mdadm, we read /etc/mdadm/mdadm.conf
578 * if /etc/mdadm.conf doesn't exist
581 conffile
== DefaultConfFile
) {
582 f
= fopen(DefaultAltConfFile
, "r");
584 conffile
= DefaultAltConfFile
;
590 while ((line
=conf_line(f
))) {
591 switch(match_keyword(line
)) {
601 case 3: /* PROGRAM */
604 case 4: /* MAILFROM */
611 fprintf(stderr
, Name
": Unknown keyword %s\n", line
);
618 /* printf("got file\n"); */
621 char *conf_get_mailaddr(char *conffile
)
623 load_conffile(conffile
);
627 char *conf_get_mailfrom(char *conffile
)
629 load_conffile(conffile
);
630 return alert_mail_from
;
633 char *conf_get_program(char *conffile
)
635 load_conffile(conffile
);
636 return alert_program
;
639 struct createinfo
*conf_get_create_info(char *conffile
)
641 load_conffile(conffile
);
645 mddev_ident_t
conf_get_ident(char *conffile
, char *dev
)
648 load_conffile(conffile
);
650 while (dev
&& rv
&& strcmp(dev
, rv
->devname
)!=0)
655 mddev_dev_t
conf_get_devs(char *conffile
)
660 static mddev_dev_t dlist
= NULL
;
664 mddev_dev_t t
= dlist
;
670 load_conffile(conffile
);
672 if (cdevlist
== NULL
)
673 /* default to 'partitions */
674 dlist
= load_partitions();
676 for (cd
=cdevlist
; cd
; cd
=cd
->next
) {
677 if (strcasecmp(cd
->name
, "partitions")==0 && dlist
== NULL
)
678 dlist
= load_partitions();
680 glob(cd
->name
, flags
, NULL
, &globbuf
);
681 flags
|= GLOB_APPEND
;
684 if (flags
& GLOB_APPEND
) {
685 for (i
=0; i
<globbuf
.gl_pathc
; i
++) {
686 mddev_dev_t t
= malloc(sizeof(*t
));
687 t
->devname
= strdup(globbuf
.gl_pathv
[i
]);
690 /* printf("one dev is %s\n", t->devname);*/
698 int match_oneof(char *devices
, char *devname
)
700 /* check if one of the comma separated patterns in devices
705 while (devices
&& *devices
) {
708 devices
= strchr(devices
, ',');
710 devices
= p
+ strlen(p
);
711 if (devices
-p
< 1024) {
712 strncpy(patn
, p
, devices
-p
);
714 if (fnmatch(patn
, devname
, FNM_PATHNAME
)==0)