]>
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
);
164 /* Hack for broken kernels (2.6.14-.24) that put
165 * "active(auto-read-only)"
166 * in /proc/mdstat instead of
167 * "active (auto-read-only)"
169 if (c
== '(' && len
>= 6
170 && strncmp(word
+len
-6, "active", 6) == 0)
174 if (c
!= EOF
) ungetc(c
, file
);
178 /* Further HACK for broken kernels.. 2.6.14-2.6.24 */
179 if (strcmp(word
, "auto-read-only)") == 0)
180 strcpy(word
, "(auto-read-only)");
182 /* printf("word is <%s>\n", word); */
191 * conf_line reads one logical line from the conffile.
192 * It skips comments and continues until it finds a line that starts
193 * with a non blank/comment. This character is pushed back for the next call
194 * A doubly linked list of words is returned.
195 * the first word will be a keyword. Other words will have had quotes removed.
198 char *conf_line(FILE *file
)
203 w
= conf_word(file
, 1);
204 if (w
== NULL
) return NULL
;
210 while ((w
= conf_word(file
,0))){
211 char *w2
= dl_strdup(w
);
215 /* printf("got a line\n");*/
219 void free_line(char *line
)
222 for (w
=dl_next(line
); w
!= line
; w
=dl_next(line
)) {
231 struct conf_dev
*next
;
235 mddev_dev_t
load_partitions(void)
237 FILE *f
= fopen("/proc/partitions", "r");
239 mddev_dev_t rv
= NULL
;
241 fprintf(stderr
, Name
": cannot open /proc/partitions\n");
244 while (fgets(buf
, 1024, f
)) {
252 major
= strtoul(buf
, &mp
, 10);
253 if (mp
== buf
|| *mp
!= ' ')
255 minor
= strtoul(mp
, NULL
, 10);
257 name
= map_dev(major
, minor
, 1);
260 d
= malloc(sizeof(*d
));
261 d
->devname
= strdup(name
);
270 mddev_dev_t
load_containers(void)
272 struct mdstat_ent
*mdstat
= mdstat_read(1, 0);
273 struct mdstat_ent
*ent
;
275 mddev_dev_t rv
= NULL
;
280 for (ent
= mdstat
; ent
; ent
= ent
->next
)
281 if (ent
->metadata_version
&&
282 strncmp(ent
->metadata_version
, "external:", 9) == 0 &&
283 !is_subarray(&ent
->metadata_version
[9])) {
284 d
= malloc(sizeof(*d
));
287 if (asprintf(&d
->devname
, "/dev/%s", ent
->dev
) < 0) {
300 struct createinfo createinfo
= {
301 .autof
= 2, /* by default, create devices with standard names */
311 int parse_auto(char *str
, char *msg
, int config
)
314 if (str
== NULL
|| *str
== 0)
316 else if (strcasecmp(str
,"no")==0)
318 else if (strcasecmp(str
,"yes")==0)
320 else if (strcasecmp(str
,"md")==0)
323 /* There might be digits, and maybe a hypen, at the end */
324 char *e
= str
+ strlen(str
);
327 while (e
> str
&& isdigit(e
[-1]))
331 if (num
<= 0) num
= 1;
333 if (e
> str
&& e
[-1] == '-')
336 if ((len
== 2 && strncasecmp(str
,"md",2)==0)) {
337 autof
= config
? 5 : 3;
338 } else if ((len
== 3 && strncasecmp(str
,"yes",3)==0)) {
340 } else if ((len
== 3 && strncasecmp(str
,"mdp",3)==0)) {
341 autof
= config
? 6 : 4;
342 } else if ((len
== 1 && strncasecmp(str
,"p",1)==0) ||
343 (len
>= 4 && strncasecmp(str
,"part",4)==0)) {
346 fprintf(stderr
, Name
": %s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
347 " optionally followed by a number.\n",
356 static void createline(char *line
)
361 for (w
=dl_next(line
); w
!=line
; w
=dl_next(w
)) {
362 if (strncasecmp(w
, "auto=", 5) == 0)
363 createinfo
.autof
= parse_auto(w
+5, "auto=", 1);
364 else if (strncasecmp(w
, "owner=", 6) == 0) {
366 fprintf(stderr
, Name
": missing owner name\n");
369 createinfo
.uid
= strtoul(w
+6, &ep
, 10);
375 createinfo
.uid
= pw
->pw_uid
;
377 fprintf(stderr
, Name
": CREATE user %s not found\n", w
+6);
379 } else if (strncasecmp(w
, "group=", 6) == 0) {
381 fprintf(stderr
, Name
": missing group name\n");
384 createinfo
.gid
= strtoul(w
+6, &ep
, 10);
390 createinfo
.gid
= gr
->gr_gid
;
392 fprintf(stderr
, Name
": CREATE group %s not found\n", w
+6);
394 } else if (strncasecmp(w
, "mode=", 5) == 0) {
396 fprintf(stderr
, Name
": missing CREATE mode\n");
399 createinfo
.mode
= strtoul(w
+5, &ep
, 8);
401 createinfo
.mode
= 0600;
402 fprintf(stderr
, Name
": unrecognised CREATE mode %s\n",
405 } else if (strncasecmp(w
, "metadata=", 9) == 0) {
406 /* style of metadata to use by default */
408 for (i
=0; superlist
[i
] && !createinfo
.supertype
; i
++)
409 createinfo
.supertype
=
410 superlist
[i
]->match_metadata_desc(w
+9);
411 if (!createinfo
.supertype
)
412 fprintf(stderr
, Name
": metadata format %s unknown, ignoring\n",
414 } else if (strncasecmp(w
, "symlinks=yes", 12) == 0)
415 createinfo
.symlinks
= 1;
416 else if (strncasecmp(w
, "symlinks=no", 11) == 0)
417 createinfo
.symlinks
= 0;
419 fprintf(stderr
, Name
": unrecognised word on CREATE line: %s\n",
425 void devline(char *line
)
430 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
431 if (w
[0] == '/' || strcasecmp(w
, "partitions") == 0 ||
432 strcasecmp(w
, "containers") == 0) {
433 cd
= malloc(sizeof(*cd
));
434 cd
->name
= strdup(w
);
438 fprintf(stderr
, Name
": unreconised word on DEVICE line: %s\n",
444 mddev_ident_t mddevlist
= NULL
;
445 mddev_ident_t
*mddevlp
= &mddevlist
;
447 void arrayline(char *line
)
451 struct mddev_ident_s mis
;
455 mis
.super_minor
= UnSet
;
457 mis
.raid_disks
= UnSet
;
461 mis
.spare_group
= NULL
;
466 mis
.bitmap_file
= NULL
;
468 mis
.container
= NULL
;
471 for (w
=dl_next(line
); w
!=line
; w
=dl_next(w
)) {
474 fprintf(stderr
, Name
": only give one device per ARRAY line: %s and %s\n",
476 else mis
.devname
= w
;
477 } else if (strncasecmp(w
, "uuid=", 5)==0 ) {
479 fprintf(stderr
, Name
": only specify uuid once, %s ignored.\n",
482 if (parse_uuid(w
+5, mis
.uuid
))
485 fprintf(stderr
, Name
": bad uuid: %s\n", w
);
487 } else if (strncasecmp(w
, "super-minor=", 12)==0 ) {
488 if (mis
.super_minor
!= UnSet
)
489 fprintf(stderr
, Name
": only specify super-minor once, %s ignored.\n",
493 mis
.super_minor
= strtol(w
+12, &endptr
, 10);
494 if (w
[12]==0 || endptr
[0]!=0 || mis
.super_minor
< 0) {
495 fprintf(stderr
, Name
": invalid super-minor number: %s\n",
497 mis
.super_minor
= UnSet
;
500 } else if (strncasecmp(w
, "name=", 5)==0) {
502 fprintf(stderr
, Name
": only specify name once, %s ignored.\n",
504 else if (strlen(w
+5) > 32)
505 fprintf(stderr
, Name
": name too long, ignoring %s\n", w
);
507 strcpy(mis
.name
, w
+5);
509 } else if (strncasecmp(w
, "bitmap=", 7) == 0) {
511 fprintf(stderr
, Name
": only specify bitmap file once. %s ignored\n",
514 mis
.bitmap_file
= strdup(w
+7);
516 } else if (strncasecmp(w
, "devices=", 8 ) == 0 ) {
518 fprintf(stderr
, Name
": only specify devices once (use a comma separated list). %s ignored\n",
521 mis
.devices
= strdup(w
+8);
522 } else if (strncasecmp(w
, "spare-group=", 12) == 0 ) {
524 fprintf(stderr
, Name
": only specify one spare group per array. %s ignored.\n",
527 mis
.spare_group
= strdup(w
+12);
528 } else if (strncasecmp(w
, "level=", 6) == 0 ) {
529 /* this is mainly for compatability with --brief output */
530 mis
.level
= map_name(pers
, w
+6);
531 } else if (strncasecmp(w
, "disks=", 6) == 0 ) {
532 /* again, for compat */
533 mis
.raid_disks
= atoi(w
+6);
534 } else if (strncasecmp(w
, "num-devices=", 12) == 0 ) {
535 /* again, for compat */
536 mis
.raid_disks
= atoi(w
+12);
537 } else if (strncasecmp(w
, "spares=", 7) == 0 ) {
538 /* for warning if not all spares present */
539 mis
.spare_disks
= atoi(w
+7);
540 } else if (strncasecmp(w
, "metadata=", 9) == 0) {
541 /* style of metadata on the devices. */
544 for(i
=0; superlist
[i
] && !mis
.st
; i
++)
545 mis
.st
= superlist
[i
]->match_metadata_desc(w
+9);
548 fprintf(stderr
, Name
": metadata format %s unknown, ignored.\n", w
+9);
549 } else if (strncasecmp(w
, "auto=", 5) == 0 ) {
550 /* whether to create device special files as needed */
551 mis
.autof
= parse_auto(w
+5, "auto type", 0);
552 } else if (strncasecmp(w
, "member=", 7) == 0) {
553 /* subarray within a container */
554 mis
.member
= strdup(w
+7);
555 } else if (strncasecmp(w
, "container=", 10) == 0) {
556 /* the container holding this subarray. Either a device name
558 mis
.container
= strdup(w
+10);
560 fprintf(stderr
, Name
": unrecognised word on ARRAY line: %s\n",
564 if (mis
.uuid_set
== 0 && mis
.devices
== NULL
&& mis
.super_minor
== UnSet
&& mis
.name
[0] == 0)
565 fprintf(stderr
, Name
": ARRAY line %s has no identity information.\n", mis
.devname
);
567 mi
= malloc(sizeof(*mi
));
569 mi
->devname
= mis
.devname
? strdup(mis
.devname
) : NULL
;
576 static char *alert_email
= NULL
;
577 void mailline(char *line
)
581 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
582 if (alert_email
== NULL
)
583 alert_email
= strdup(w
);
585 fprintf(stderr
, Name
": excess address on MAIL line: %s - ignored\n",
590 static char *alert_mail_from
= NULL
;
591 void mailfromline(char *line
)
595 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
596 if (alert_mail_from
== NULL
)
597 alert_mail_from
= strdup(w
);
601 if (asprintf(&t
, "%s %s", alert_mail_from
, w
) > 0) {
602 free(alert_mail_from
);
610 static char *alert_program
= NULL
;
611 void programline(char *line
)
615 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
616 if (alert_program
== NULL
)
617 alert_program
= strdup(w
);
619 fprintf(stderr
, Name
": excess program on PROGRAM line: %s - ignored\n",
624 static char *home_host
= NULL
;
625 void homehostline(char *line
)
629 for (w
=dl_next(line
); w
!= line
; w
=dl_next(w
)) {
630 if (home_host
== NULL
)
631 home_host
= strdup(w
);
633 fprintf(stderr
, Name
": excess host name on HOMEHOST line: %s - ignored\n",
641 static char *conffile
= NULL
;
642 void set_conffile(char *file
)
647 void load_conffile(void)
653 if (conffile
== NULL
)
654 conffile
= DefaultConfFile
;
656 if (strcmp(conffile
, "none") == 0) {
660 if (strcmp(conffile
, "partitions")==0) {
661 char *list
= dl_strdup("DEV");
663 dl_add(list
, dl_strdup("partitions"));
669 f
= fopen(conffile
, "r");
670 /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
671 * To allow Debian users to compile from clean source and still
672 * have a working mdadm, we read /etc/mdadm/mdadm.conf
673 * if /etc/mdadm.conf doesn't exist
676 conffile
== DefaultConfFile
) {
677 f
= fopen(DefaultAltConfFile
, "r");
679 conffile
= DefaultAltConfFile
;
685 while ((line
=conf_line(f
))) {
686 switch(match_keyword(line
)) {
709 fprintf(stderr
, Name
": Unknown keyword %s\n", line
);
716 /* printf("got file\n"); */
719 char *conf_get_mailaddr(void)
725 char *conf_get_mailfrom(void)
728 return alert_mail_from
;
731 char *conf_get_program(void)
734 return alert_program
;
737 char *conf_get_homehost(void)
743 struct createinfo
*conf_get_create_info(void)
749 mddev_ident_t
conf_get_ident(char *dev
)
754 while (dev
&& rv
&& (rv
->devname
== NULL
755 || strcmp(dev
, rv
->devname
)!=0))
760 static void append_dlist(mddev_dev_t
*dlp
, mddev_dev_t list
)
767 mddev_dev_t
conf_get_devs()
772 static mddev_dev_t dlist
= NULL
;
776 mddev_dev_t t
= dlist
;
784 if (cdevlist
== NULL
) {
785 /* default to 'partitions' and 'containers' */
786 dlist
= load_partitions();
787 append_dlist(&dlist
, load_containers());
790 for (cd
=cdevlist
; cd
; cd
=cd
->next
) {
791 if (strcasecmp(cd
->name
, "partitions")==0)
792 append_dlist(&dlist
, load_partitions());
793 else if (strcasecmp(cd
->name
, "containers")==0)
794 append_dlist(&dlist
, load_containers());
796 glob(cd
->name
, flags
, NULL
, &globbuf
);
797 flags
|= GLOB_APPEND
;
800 if (flags
& GLOB_APPEND
) {
801 for (i
=0; i
<globbuf
.gl_pathc
; i
++) {
802 mddev_dev_t t
= malloc(sizeof(*t
));
803 t
->devname
= strdup(globbuf
.gl_pathv
[i
]);
807 /* printf("one dev is %s\n", t->devname);*/
815 int conf_test_dev(char *devname
)
818 if (cdevlist
== NULL
)
819 /* allow anything by default */
821 for (cd
= cdevlist
; cd
; cd
= cd
->next
) {
822 if (strcasecmp(cd
->name
, "partitions") == 0)
824 if (fnmatch(cd
->name
, devname
, FNM_PATHNAME
) == 0)
831 int match_oneof(char *devices
, char *devname
)
833 /* check if one of the comma separated patterns in devices
838 while (devices
&& *devices
) {
841 devices
= strchr(devices
, ',');
843 devices
= p
+ strlen(p
);
844 if (devices
-p
< 1024) {
845 strncpy(patn
, p
, devices
-p
);
847 if (fnmatch(patn
, devname
, FNM_PATHNAME
)==0)