]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - config.c
2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
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 enum linetype
{ Devices
, Array
, Mailaddr
, Mailfrom
, Program
, CreateDev
, Homehost
, LTEnd
};
84 [Devices
] = "devices",
86 [Mailaddr
] = "mailaddr",
87 [Mailfrom
] = "mailfrom",
88 [Program
] = "program",
89 [CreateDev
] = "create",
90 [Homehost
] = "homehost",
95 * match_keyword returns an index into the keywords array, or -1 for no match
96 * case is ignored, and at least three characters must be given
99 int match_keyword(char *word
)
101 int len
= strlen(word
);
104 if (len
< 3) return -1;
105 for (n
=0; keywords
[n
]; n
++) {
106 if (strncasecmp(word
, keywords
[n
], len
)==0)
112 /* conf_word gets one word from the conf file.
113 * if "allow_key", then accept words at the start of a line,
114 * otherwise stop when such a word is found.
115 * We assume that the file pointer is at the end of a word, so the
116 * next character is a space, or a newline. If not, it is the start of a line.
119 char *conf_word(FILE *file
, int allow_key
)
126 char *word
= malloc(wsize
);
130 while (wordfound
==0) {
131 /* at the end of a word.. */
134 while (c
!= EOF
&& c
!= '\n')
137 if (c
== '\n') continue;
139 if (c
!= ' ' && c
!= '\t' && ! allow_key
) {
143 /* looks like it is safe to get a word here, if there is one */
145 /* first, skip any spaces */
146 while (c
== ' ' || c
== '\t')
148 if (c
!= EOF
&& c
!= '\n' && c
!= '#') {
149 /* we really have a character of a word, so start saving it */
150 while (c
!= EOF
&& c
!= '\n' && (quote
|| (c
!=' ' && c
!= '\t'))) {
152 if (quote
&& c
== quote
) quote
= 0;
153 else if (quote
== 0 && (c
== '\'' || c
== '"'))
156 if (len
== wsize
-1) {
158 word
= realloc(word
, wsize
);
166 if (c
!= EOF
) ungetc(c
, file
);
169 /* printf("word is <%s>\n", word); */
178 * conf_line reads one logical line from the conffile.
179 * It skips comments and continues until it finds a line that starts
180 * with a non blank/comment. This character is pushed back for the next call
181 * A doubly linked list of words is returned.
182 * the first word will be a keyword. Other words will have had quotes removed.
185 char *conf_line(FILE *file
)
190 w
= conf_word(file
, 1);
191 if (w
== NULL
) return NULL
;
197 while ((w
= conf_word(file
,0))){
198 char *w2
= dl_strdup(w
);
202 /* printf("got a line\n");*/
206 void free_line(char *line
)
209 for (w
=dl_next(line
); w
!= line
; w
=dl_next(line
)) {
218 struct conf_dev
*next
;
222 mddev_dev_t
load_partitions(void)
224 FILE *f
= fopen("/proc/partitions", "r");
226 mddev_dev_t rv
= NULL
;
228 fprintf(stderr
, Name
": cannot open /proc/partitions\n");
231 while (fgets(buf
, 1024, f
)) {
239 major
= strtoul(buf
, &mp
, 10);
240 if (mp
== buf
|| *mp
!= ' ')
242 minor
= strtoul(mp
, NULL
, 10);
244 name
= map_dev(major
, minor
, 1);
246 d
= malloc(sizeof(*d
));
247 d
->devname
= strdup(name
);
255 struct createinfo createinfo
= {
264 int parse_auto(char *str
, char *msg
, int config
)
267 if (str
== NULL
|| *str
== 0)
269 else if (strcasecmp(str
,"no")==0)
271 else if (strcasecmp(str
,"yes")==0)
273 else if (strcasecmp(str
,"md")==0)
276 /* There might be digits, and maybe a hypen, at the end */
277 char *e
= str
+ strlen(str
);
280 while (e
> str
&& isdigit(e
[-1]))
284 if (num
<= 0) num
= 1;
286 if (e
> str
&& e
[-1] == '-')
289 if ((len
== 2 && strncasecmp(str
,"md",2)==0)) {
290 autof
= config
? 5 : 3;
291 } else if ((len
== 3 && strncasecmp(str
,"mdp",3)==0)) {
292 autof
= config
? 6 : 4;
293 } else if ((len
== 1 && strncasecmp(str
,"p",1)==0) ||
294 (len
>= 4 && strncasecmp(str
,"part",4)==0)) {
297 fprintf(stderr
, Name
": %s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
298 " optionally followed by a number.\n",
307 static void createline(char *line
)
312 for (w
=dl_next(line
); w
!=line
; w
=dl_next(w
)) {
313 if (strncasecmp(w
, "auto=", 5) == 0)
314 createinfo
.autof
= parse_auto(w
+5, "auto=", 1);
315 else if (strncasecmp(w
, "owner=", 6) == 0) {
317 fprintf(stderr
, Name
": missing owner name\n");
320 createinfo
.uid
= strtoul(w
+6, &ep
, 10);
327 createinfo
.uid
= pw
->pw_uid
;
330 fprintf(stderr
, Name
": CREATE user %s not found\n", w
+6);
332 } else if (strncasecmp(w
, "group=", 6) == 0) {
334 fprintf(stderr
, Name
": missing group name\n");
337 createinfo
.gid
= strtoul(w
+6, &ep
, 10);
344 createinfo
.gid
= gr
->gr_gid
;
347 fprintf(stderr
, Name
": CREATE group %s not found\n", w
+6);
349 } else if (strncasecmp(w
, "mode=", 5) == 0) {
351 fprintf(stderr
, Name
": missing CREATE mode\n");
354 createinfo
.mode
= strtoul(w
+5, &ep
, 8);
356 createinfo
.mode
= 0600;
357 fprintf(stderr
, Name
": unrecognised CREATE mode %s\n",
361 fprintf(stderr
, Name
": unrecognised word on CREATE line: %s\n",
367 void devline(char *line
)
372 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
373 if (w
[0] == '/' || strcasecmp(w
, "partitions") == 0) {
374 cd
= malloc(sizeof(*cd
));
375 cd
->name
= strdup(w
);
379 fprintf(stderr
, Name
": unreconised word on DEVICE line: %s\n",
385 mddev_ident_t mddevlist
= NULL
;
386 mddev_ident_t
*mddevlp
= &mddevlist
;
388 void arrayline(char *line
)
392 struct mddev_ident_s mis
;
396 mis
.super_minor
= UnSet
;
398 mis
.raid_disks
= UnSet
;
402 mis
.spare_group
= NULL
;
407 mis
.bitmap_file
= NULL
;
410 for (w
=dl_next(line
); w
!=line
; w
=dl_next(w
)) {
413 fprintf(stderr
, Name
": only give one device per ARRAY line: %s and %s\n",
415 else mis
.devname
= w
;
416 } else if (strncasecmp(w
, "uuid=", 5)==0 ) {
418 fprintf(stderr
, Name
": only specify uuid once, %s ignored.\n",
421 if (parse_uuid(w
+5, mis
.uuid
))
424 fprintf(stderr
, Name
": bad uuid: %s\n", w
);
426 } else if (strncasecmp(w
, "super-minor=", 12)==0 ) {
427 if (mis
.super_minor
!= UnSet
)
428 fprintf(stderr
, Name
": only specify super-minor once, %s ignored.\n",
432 mis
.super_minor
= strtol(w
+12, &endptr
, 10);
433 if (w
[12]==0 || endptr
[0]!=0 || mis
.super_minor
< 0) {
434 fprintf(stderr
, Name
": invalid super-minor number: %s\n",
436 mis
.super_minor
= UnSet
;
439 } else if (strncasecmp(w
, "name=", 5)==0) {
441 fprintf(stderr
, Name
": only specify name once, %s ignored.\n",
443 else if (strlen(w
+5) > 32)
444 fprintf(stderr
, Name
": name too long, ignoring %s\n", w
);
446 strcpy(mis
.name
, w
+5);
448 } else if (strncasecmp(w
, "bitmap=", 7) == 0) {
450 fprintf(stderr
, Name
": only specify bitmap file once. %s ignored\n",
453 mis
.bitmap_file
= w
+7;
455 } else if (strncasecmp(w
, "devices=", 8 ) == 0 ) {
457 fprintf(stderr
, Name
": only specify devices once (use a comma separated list). %s ignored\n",
460 mis
.devices
= strdup(w
+8);
461 } else if (strncasecmp(w
, "spare-group=", 12) == 0 ) {
463 fprintf(stderr
, Name
": only specify one spare group per array. %s ignored.\n",
466 mis
.spare_group
= strdup(w
+12);
467 } else if (strncasecmp(w
, "level=", 6) == 0 ) {
468 /* this is mainly for compatability with --brief output */
469 mis
.level
= map_name(pers
, w
+6);
470 } else if (strncasecmp(w
, "disks=", 6) == 0 ) {
471 /* again, for compat */
472 mis
.raid_disks
= atoi(w
+6);
473 } else if (strncasecmp(w
, "num-devices=", 12) == 0 ) {
474 /* again, for compat */
475 mis
.raid_disks
= atoi(w
+12);
476 } else if (strncasecmp(w
, "spares=", 7) == 0 ) {
477 /* for warning if not all spares present */
478 mis
.spare_disks
= atoi(w
+7);
479 } else if (strncasecmp(w
, "metadata=", 9) == 0) {
480 /* style of metadata on the devices. */
483 for(i
=0; superlist
[i
] && !mis
.st
; i
++)
484 mis
.st
= superlist
[i
]->match_metadata_desc(w
+9);
487 fprintf(stderr
, Name
": metadata format %s unknown, ignored.\n", w
+9);
488 } else if (strncasecmp(w
, "auto=", 5) == 0 ) {
489 /* whether to create device special files as needed */
490 mis
.autof
= parse_auto(w
+5, "auto type", 0);
492 fprintf(stderr
, Name
": unrecognised word on ARRAY line: %s\n",
496 if (mis
.devname
== NULL
)
497 fprintf(stderr
, Name
": ARRAY line with no device\n");
498 else if (mis
.uuid_set
== 0 && mis
.devices
== NULL
&& mis
.super_minor
== UnSet
&& mis
.name
[0] == 0)
499 fprintf(stderr
, Name
": ARRAY line %s has no identity information.\n", mis
.devname
);
501 mi
= malloc(sizeof(*mi
));
503 mi
->devname
= strdup(mis
.devname
);
510 static char *alert_email
= NULL
;
511 void mailline(char *line
)
515 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
516 if (alert_email
== NULL
)
517 alert_email
= strdup(w
);
519 fprintf(stderr
, Name
": excess address on MAIL line: %s - ignored\n",
524 static char *alert_mail_from
= NULL
;
525 void mailfromline(char *line
)
529 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
530 if (alert_mail_from
== NULL
)
531 alert_mail_from
= strdup(w
);
534 asprintf(&t
, "%s %s", alert_mail_from
, w
);
535 free(alert_mail_from
);
542 static char *alert_program
= NULL
;
543 void programline(char *line
)
547 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
548 if (alert_program
== NULL
)
549 alert_program
= strdup(w
);
551 fprintf(stderr
, Name
": excess program on PROGRAM line: %s - ignored\n",
556 static char *home_host
= NULL
;
557 void homehostline(char *line
)
561 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
562 if (home_host
== NULL
)
563 home_host
= strdup(w
);
565 fprintf(stderr
, Name
": excess host name on HOMEHOST line: %s - ignored\n",
573 void load_conffile(char *conffile
)
579 if (conffile
== NULL
)
580 conffile
= DefaultConfFile
;
582 if (strcmp(conffile
, "none") == 0) {
586 if (strcmp(conffile
, "partitions")==0) {
587 char *list
= dl_strdup("DEV");
589 dl_add(list
, dl_strdup("partitions"));
595 f
= fopen(conffile
, "r");
596 /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
597 * To allow Debian users to compile from clean source and still
598 * have a working mdadm, we read /etc/mdadm/mdadm.conf
599 * if /etc/mdadm.conf doesn't exist
602 conffile
== DefaultConfFile
) {
603 f
= fopen(DefaultAltConfFile
, "r");
605 conffile
= DefaultAltConfFile
;
611 while ((line
=conf_line(f
))) {
612 switch(match_keyword(line
)) {
635 fprintf(stderr
, Name
": Unknown keyword %s\n", line
);
642 /* printf("got file\n"); */
645 char *conf_get_mailaddr(char *conffile
)
647 load_conffile(conffile
);
651 char *conf_get_mailfrom(char *conffile
)
653 load_conffile(conffile
);
654 return alert_mail_from
;
657 char *conf_get_program(char *conffile
)
659 load_conffile(conffile
);
660 return alert_program
;
663 char *conf_get_homehost(char *conffile
)
665 load_conffile(conffile
);
669 struct createinfo
*conf_get_create_info(char *conffile
)
671 load_conffile(conffile
);
675 mddev_ident_t
conf_get_ident(char *conffile
, char *dev
)
678 load_conffile(conffile
);
680 while (dev
&& rv
&& strcmp(dev
, rv
->devname
)!=0)
685 mddev_dev_t
conf_get_devs(char *conffile
)
690 static mddev_dev_t dlist
= NULL
;
694 mddev_dev_t t
= dlist
;
700 load_conffile(conffile
);
702 if (cdevlist
== NULL
)
703 /* default to 'partitions */
704 dlist
= load_partitions();
706 for (cd
=cdevlist
; cd
; cd
=cd
->next
) {
707 if (strcasecmp(cd
->name
, "partitions")==0 && dlist
== NULL
)
708 dlist
= load_partitions();
710 glob(cd
->name
, flags
, NULL
, &globbuf
);
711 flags
|= GLOB_APPEND
;
714 if (flags
& GLOB_APPEND
) {
715 for (i
=0; i
<globbuf
.gl_pathc
; i
++) {
716 mddev_dev_t t
= malloc(sizeof(*t
));
717 t
->devname
= strdup(globbuf
.gl_pathv
[i
]);
720 /* printf("one dev is %s\n", t->devname);*/
728 int match_oneof(char *devices
, char *devname
)
730 /* check if one of the comma separated patterns in devices
735 while (devices
&& *devices
) {
738 devices
= strchr(devices
, ',');
740 devices
= p
+ strlen(p
);
741 if (devices
-p
< 1024) {
742 strncpy(patn
, p
, devices
-p
);
744 if (fnmatch(patn
, devname
, FNM_PATHNAME
)==0)