summaryrefslogtreecommitdiffstats
path: root/config.c
blob: 5f12a1f8641c340f49764566cae9f4a8f072d408 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
/*
 * mdadm - manage Linux "md" devices aka RAID arrays.
 *
 * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
 *
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *    Author: Neil Brown
 *    Email: <neilb@suse.de>
 */

#include	"mdadm.h"
#include	"dlink.h"
#include	<dirent.h>
#include	<glob.h>
#include	<fnmatch.h>
#include	<ctype.h>
#include	<pwd.h>
#include	<grp.h>

/*
 * Read the config file
 *
 * conf_get_uuids gets a list of devicename+uuid pairs
 * conf_get_devs gets device names after expanding wildcards
 *
 * Each keeps the returned list and frees it when asked to make
 * a new list.
 *
 * The format of the config file needs to be fairly extensible.
 * Now, arrays only have names and uuids and devices merely are.
 * But later arrays might want names, and devices might want superblock
 * versions, and who knows what else.
 * I like free format, abhore backslash line continuation, adore
 *   indentation for structure and am ok about # comments.
 *
 * So, each line that isn't blank or a #comment must either start
 *  with a key word, and not be indented, or must start with a
 *  non-key-word and must be indented.
 *
 * Keywords are DEVICE and ARRAY ... and several others.
 * DEV{ICE} introduces some devices that might contain raid components.
 * e.g.
 *   DEV style=0 /dev/sda* /dev/hd*
 *   DEV style=1 /dev/sd[b-f]*
 * ARR{AY} describes an array giving md device and attributes like uuid=whatever
 * e.g.
 *   ARRAY /dev/md0 uuid=whatever name=something
 * Spaces separate words on each line.  Quoting, with "" or '' protects them,
 * but may not wrap over lines
 *
 */
#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#endif

#ifndef CONFFILE
#define CONFFILE "/etc/mdadm.conf"
#endif
#ifndef CONFFILE2
/* for Debian compatibility .... */
#define CONFFILE2 "/etc/mdadm/mdadm.conf"
#endif
char DefaultConfFile[] = CONFFILE;
char DefaultConfDir[] = CONFFILE ".d";
char DefaultAltConfFile[] = CONFFILE2;
char DefaultAltConfDir[] = CONFFILE2 ".d";

enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev,
		Homehost, HomeCluster, AutoMode, Policy, PartPolicy, Sysfs,
		MonitorDelay, LTEnd };
char *keywords[] = {
	[Devices]  = "devices",
	[Array]    = "array",
	[Mailaddr] = "mailaddr",
	[Mailfrom] = "mailfrom",
	[Program]  = "program",
	[CreateDev]= "create",
	[Homehost] = "homehost",
	[HomeCluster] = "homecluster",
	[AutoMode] = "auto",
	[Policy]   = "policy",
	[PartPolicy]="part-policy",
	[Sysfs]    = "sysfs",
	[MonitorDelay] = "monitordelay",
	[LTEnd]    = NULL
};

/*
 * match_keyword returns an index into the keywords array, or -1 for no match
 * case is ignored, and at least three characters must be given
 */

int match_keyword(char *word)
{
	int len = strlen(word);
	int n;

	if (len < 3)
		return -1;
	for (n = 0; keywords[n]; n++) {
		if (strncasecmp(word, keywords[n], len) == 0)
			return n;
	}

	return -1;
}

/**
 * is_devname_ignore() - check if &devname is a special "<ignore>" keyword.
 */
bool is_devname_ignore(const char *devname)
{
	static const char keyword[] = "<ignore>";

	if (strcasecmp(devname, keyword) == 0)
		return true;
	return false;
}

/**
 * ident_log() - generate and write message to the user.
 * @param_name: name of the property.
 * @value: value of the property.
 * @reason: meaningful description.
 * @cmdline: context dependent actions, see below.
 *
 * The function is made to provide similar error handling for both config and cmdline. The behavior
 * is configurable via @cmdline. Message has following format:
 * "Value "@value" cannot be set for @param_name. Reason: @reason."
 *
 * If cmdline is on:
 * - message is written to stderr.
 * otherwise:
 * - message is written to stdout.
 * - "Value ignored" is added at the end of the message.
 */
static void ident_log(const char *param_name, const char *value, const char *reason,
		      const bool cmdline)
{
	if (cmdline == true)
		pr_err("Value \"%s\" cannot be set as %s. Reason: %s.\n", value, param_name,
		       reason);
	else
		pr_info("Value \"%s\" cannot be set as %s. Reason: %s. Value ignored.\n", value,
			param_name, reason);
}

/**
 * ident_init() - Set defaults.
 * @ident: ident pointer, not NULL.
 */
inline void ident_init(struct mddev_ident *ident)
{
	assert(ident);

	ident->assembled = false;
	ident->autof = 0;
	ident->bitmap_fd = -1;
	ident->bitmap_file = NULL;
	ident->container = NULL;
	ident->devices = NULL;
	ident->devname = NULL;
	ident->level = UnSet;
	ident->member = NULL;
	ident->name[0] = 0;
	ident->next = NULL;
	ident->raid_disks = UnSet;
	ident->spare_group = NULL;
	ident->spare_disks = 0;
	ident->st = NULL;
	ident->super_minor = UnSet;
	ident->uuid[0] = 0;
	ident->uuid_set = 0;
}

/**
 * _ident_set_devname()- verify devname and set it in &mddev_ident.
 * @ident: pointer to &mddev_ident.
 * @devname: devname to be set.
 * @cmdline: context dependent actions. If set, ignore keyword is not allowed.
 *
 * @devname can have following forms:
 *	'<ignore>' keyword (if allowed)
 *	/dev/md{number}
 *	/dev/md_d{number} (legacy)
 *	/dev/md_{name}
 *	/dev/md/{name}
 *	{name}
 *
 * {name} must follow name's criteria and be POSIX compatible.
 * If criteria passed, duplicate memory and set devname in @ident.
 *
 * Return: %MDADM_STATUS_SUCCESS or %MDADM_STATUS_ERROR.
 */
mdadm_status_t _ident_set_devname(struct mddev_ident *ident, const char *devname,
				  const bool cmdline)
{
	assert(ident);
	assert(devname);

	static const char named_dev_pref[] = DEV_NUM_PREF "_";
	static const int named_dev_pref_size = sizeof(named_dev_pref) - 1;
	const char *prop_name = "devname";
	const char *name;

	if (ident->devname) {
		ident_log(prop_name, devname, "Already defined", cmdline);
		return MDADM_STATUS_ERROR;
	}

	if (is_devname_ignore(devname) == true) {
		if (!cmdline)
			goto pass;

		ident_log(prop_name, devname, "Special keyword is invalid in this context",
			  cmdline);
		return MDADM_STATUS_ERROR;
	}

	if (is_devname_md_numbered(devname) == true || is_devname_md_d_numbered(devname) == true)
		goto pass;

	if (strncmp(devname, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0)
		name = devname + DEV_MD_DIR_LEN;
	else if (strncmp(devname, named_dev_pref, named_dev_pref_size) == 0)
		name = devname + named_dev_pref_size;
	else
		name = devname;

	if (is_name_posix_compatible(name) == false) {
		ident_log(prop_name, name, "Not POSIX compatible", cmdline);
		return MDADM_STATUS_ERROR;
	}

	if (is_string_lq(name, MD_NAME_MAX + 1) == false) {
		ident_log(prop_name, devname, "Invalid length", cmdline);
		return MDADM_STATUS_ERROR;
	}
pass:
	ident->devname = xstrdup(devname);
	return MDADM_STATUS_SUCCESS;
}

/**
 * _ident_set_name()- set name in &mddev_ident.
 * @ident: pointer to &mddev_ident.
 * @name: name to be set.
 * @cmdline: context dependent actions.
 *
 * If criteria passed, set name in @ident.
 *
 * Return: %MDADM_STATUS_SUCCESS or %MDADM_STATUS_ERROR.
 */
static mdadm_status_t _ident_set_name(struct mddev_ident *ident, const char *name,
				      const bool cmdline)
{
	assert(name);
	assert(ident);

	const char *prop_name = "name";

	if (ident->name[0]) {
		ident_log(prop_name, name, "Already defined", cmdline);
		return MDADM_STATUS_ERROR;
	}

	if (is_string_lq(name, MD_NAME_MAX + 1) == false) {
		ident_log(prop_name, name, "Too long or empty", cmdline);
		return MDADM_STATUS_ERROR;
	}

	if (is_name_posix_compatible(name) == false) {
		ident_log(prop_name, name, "Not POSIX compatible", cmdline);
		return MDADM_STATUS_ERROR;
	}

	snprintf(ident->name, MD_NAME_MAX + 1, "%s", name);
	return MDADM_STATUS_SUCCESS;
}

/**
 * ident_set_devname()- exported, for cmdline.
 */
mdadm_status_t ident_set_devname(struct mddev_ident *ident, const char *name)
{
	return _ident_set_devname(ident, name, true);
}

/**
 * ident_set_name()- exported, for cmdline.
 */
mdadm_status_t ident_set_name(struct mddev_ident *ident, const char *name)
{
	return _ident_set_name(ident, name, true);
}

struct conf_dev {
	struct conf_dev *next;
	char *name;
} *cdevlist = NULL;

struct mddev_dev *load_partitions(void)
{
	FILE *f = fopen("/proc/partitions", "r");
	char buf[1024];
	struct mddev_dev *rv = NULL;

	if (f == NULL) {
		pr_err("cannot open /proc/partitions\n");
		return NULL;
	}
	while (fgets(buf, 1024, f)) {
		int major, minor;
		char *name, *mp;
		struct mddev_dev *d;

		buf[1023] = '\0';
		if (buf[0] != ' ')
			continue;
		major = strtoul(buf, &mp, 10);
		if (mp == buf || *mp != ' ')
			continue;
		minor = strtoul(mp, NULL, 10);

		name = map_dev(major, minor, 1);
		if (!name)
			continue;
		d = xcalloc(1, sizeof(*d));
		d->devname = xstrdup(name);
		d->next = rv;
		rv = d;
	}
	fclose(f);
	return rv;
}

struct mddev_dev *load_containers(void)
{
	struct mdstat_ent *mdstat = mdstat_read(0, 0);
	struct mdstat_ent *ent;
	struct mddev_dev *d;
	struct mddev_dev *rv = NULL;
	struct map_ent *map = NULL, *me;

	if (!mdstat)
		return NULL;

	for (ent = mdstat; ent; ent = ent->next)
		if (ent->metadata_version &&
		    strncmp(ent->metadata_version, "external:", 9) == 0 &&
		    !is_subarray(&ent->metadata_version[9])) {
			d = xcalloc(1, sizeof(*d));
			me = map_by_devnm(&map, ent->devnm);
			if (me)
				d->devname = xstrdup(me->path);
			else if (asprintf(&d->devname, "/dev/%s", ent->devnm) < 0) {
				free(d);
				continue;
			}
			d->next = rv;
			rv = d;
			map_free(map);
			map = NULL;
		}
	free_mdstat(mdstat);

	return rv;
}

struct createinfo createinfo = {
	.autof = 2, /* by default, create devices with standard names */
	.names = 0, /* By default, stick with numbered md devices. */
	.bblist = 1, /* Use a bad block list by default */
#ifdef DEBIAN
	.gid = 6, /* disk */
	.mode = 0660,
#else
	.mode = 0600,
#endif
};

int parse_auto(char *str, char *msg, int config)
{
	int autof;
	if (str == NULL || *str == 0)
		autof = 2;
	else if (strcasecmp(str, "no") == 0)
		autof = 1;
	else if (strcasecmp(str, "yes") == 0)
		autof = 2;
	else if (strcasecmp(str, "md") == 0)
		autof = config ? 5:3;
	else {
		/* There might be digits, and maybe a hypen, at the end */
		char *e = str + strlen(str);
		int num = 4;
		int len;
		while (e > str && isdigit(e[-1]))
			e--;
		if (*e) {
			num = atoi(e);
			if (num <= 0)
				num = 1;
		}
		if (e > str && e[-1] == '-')
			e--;
		len = e - str;
		if ((len == 2 && strncasecmp(str, "md", 2) == 0)) {
			autof = config ? 5 : 3;
		} else if ((len == 3 && strncasecmp(str, "yes", 3) == 0)) {
			autof = 2;
		} else if ((len == 3 && strncasecmp(str, "mdp", 3) == 0)) {
			autof = config ? 6 : 4;
		} else if ((len == 1 && strncasecmp(str, "p", 1) == 0) ||
			   (len >= 4 && strncasecmp(str, "part", 4) == 0)) {
			autof = 6;
		} else {
			pr_err("%s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
				"        optionally followed by a number.\n",
				msg, str);
			exit(2);
		}
		autof |= num << 3;
	}
	return autof;
}

static void createline(char *line)
{
	char *w;
	char *ep;

	for (w = dl_next(line); w != line; w = dl_next(w)) {
		if (strncasecmp(w, "auto=", 5) == 0)
			createinfo.autof = parse_auto(w + 5, "auto=", 1);
		else if (strncasecmp(w, "owner=", 6) == 0) {
			if (w[6] == 0) {
				pr_err("missing owner name\n");
				continue;
			}
			createinfo.uid = strtoul(w + 6, &ep, 10);
			if (*ep != 0) {
				struct passwd *pw;
				/* must be a name */
				pw = getpwnam(w + 6);
				if (pw)
					createinfo.uid = pw->pw_uid;
				else
					pr_err("CREATE user %s not found\n",
					       w + 6);
			}
		} else if (strncasecmp(w, "group=", 6) == 0) {
			if (w[6] == 0) {
				pr_err("missing group name\n");
				continue;
			}
			createinfo.gid = strtoul(w + 6, &ep, 10);
			if (*ep != 0) {
				struct group *gr;
				/* must be a name */
				gr = getgrnam(w + 6);
				if (gr)
					createinfo.gid = gr->gr_gid;
				else
					pr_err("CREATE group %s not found\n",
					       w + 6);
			}
		} else if (strncasecmp(w, "mode=", 5) == 0) {
			if (w[5] == 0) {
				pr_err("missing CREATE mode\n");
				continue;
			}
			createinfo.mode = strtoul(w + 5, &ep, 8);
			if (*ep != 0) {
				createinfo.mode = 0600;
				pr_err("unrecognised CREATE mode %s\n",
					w + 5);
			}
		} else if (strncasecmp(w, "metadata=", 9) == 0) {
			/* style of metadata to use by default */
			int i;
			for (i = 0; superlist[i] && !createinfo.supertype; i++)
				createinfo.supertype = superlist[i]->match_metadata_desc(w + 9);
			if (!createinfo.supertype)
				pr_err("metadata format %s unknown, ignoring\n",
					w+9);
		} else if (strncasecmp(w, "names=yes", 12) == 0)
			createinfo.names = 1;
		else if  (strncasecmp(w, "names=no", 11) == 0)
			createinfo.names = 0;
		else if  (strncasecmp(w, "bbl=no", 11) == 0)
			createinfo.bblist = 0;
		else if  (strncasecmp(w, "bbl=yes", 11) == 0)
			createinfo.bblist = 1;
		else {
			pr_err("unrecognised word on CREATE line: %s\n",
				w);
		}
	}
}

void devline(char *line)
{
	char *w;
	struct conf_dev *cd;

	for (w = dl_next(line); w != line; w = dl_next(w)) {
		if (w[0] == '/' || strcasecmp(w, "partitions") == 0 ||
		    strcasecmp(w, "containers") == 0) {
			cd = xmalloc(sizeof(*cd));
			cd->name = xstrdup(w);
			cd->next = cdevlist;
			cdevlist = cd;
		} else {
			pr_err("unreconised word on DEVICE line: %s\n", w);
		}
	}
}

struct mddev_ident *mddevlist = NULL;
struct mddev_ident **mddevlp = &mddevlist;

void arrayline(char *line)
{
	char *w;

	struct mddev_ident mis;
	struct mddev_ident *mi;

	ident_init(&mis);

	for (w = dl_next(line); w != line; w = dl_next(w)) {
		if (w[0] == '/' || strchr(w, '=') == NULL) {
			_ident_set_devname(&mis, w, false);
		} else if (strncasecmp(w, "uuid=", 5) == 0) {
			if (mis.uuid_set)
				pr_err("only specify uuid once, %s ignored.\n",
				       w);
			else {
				if (parse_uuid(w + 5, mis.uuid))
					mis.uuid_set = 1;
				else
					pr_err("bad uuid: %s\n", w);
			}
		} else if (strncasecmp(w, "super-minor=", 12) == 0) {
			if (mis.super_minor != UnSet)
				pr_err("only specify super-minor once, %s ignored.\n",
					w);
			else {
				char *endptr;
				int minor = strtol(w + 12, &endptr, 10);

				if (w[12] == 0 || endptr[0] != 0 || minor < 0)
					pr_err("invalid super-minor number: %s\n",
					       w);
				else
					mis.super_minor = minor;
			}
		} else if (strncasecmp(w, "name=", 5) == 0) {
			_ident_set_name(&mis, w + 5, false);
		} else if (strncasecmp(w, "bitmap=", 7) == 0) {
			if (mis.bitmap_file)
				pr_err("only specify bitmap file once. %s ignored\n",
					w);
			else
				mis.bitmap_file = xstrdup(w + 7);

		} else if (strncasecmp(w, "devices=", 8 ) == 0) {
			if (mis.devices)
				pr_err("only specify devices once (use a comma separated list). %s ignored\n",
					w);
			else
				mis.devices = xstrdup(w + 8);
		} else if (strncasecmp(w, "spare-group=", 12) == 0) {
			if (mis.spare_group)
				pr_err("only specify one spare group per array. %s ignored.\n",
					w);
			else
				mis.spare_group = xstrdup(w + 12);
		} else if (strncasecmp(w, "level=", 6) == 0 ) {
			/* this is mainly for compatability with --brief output */
			mis.level = map_name(pers, w + 6);
		} else if (strncasecmp(w, "disks=", 6) == 0) {
			/* again, for compat */
			mis.raid_disks = atoi(w + 6);
		} else if (strncasecmp(w, "num-devices=", 12) == 0) {
			/* again, for compat */
			mis.raid_disks = atoi(w + 12);
		} else if (strncasecmp(w, "spares=", 7) == 0) {
			/* for warning if not all spares present */
			mis.spare_disks = atoi(w + 7);
		} else if (strncasecmp(w, "metadata=", 9) == 0) {
			/* style of metadata on the devices. */
			int i;

			for(i=0; superlist[i] && !mis.st; i++)
				mis.st = superlist[i]->
					match_metadata_desc(w + 9);

			if (!mis.st)
				pr_err("metadata format %s unknown, ignored.\n",
				       w + 9);
		} else if (strncasecmp(w, "auto=", 5) == 0 ) {
			/* whether to create device special files as needed */
			mis.autof = parse_auto(w + 5, "auto type", 0);
		} else if (strncasecmp(w, "member=", 7) == 0) {
			/* subarray within a container */
			mis.member = xstrdup(w + 7);
		} else if (strncasecmp(w, "container=", 10) == 0) {
			/* The container holding this subarray.
			 * Either a device name or a uuid */
			mis.container = xstrdup(w + 10);
		} else {
			pr_err("unrecognised word on ARRAY line: %s\n",
				w);
		}
	}
	if (mis.uuid_set == 0 && mis.devices == NULL &&
	    mis.super_minor == UnSet && mis.name[0] == 0 &&
	    (mis.container == NULL || mis.member == NULL))
		pr_err("ARRAY line %s has no identity information.\n",
		       mis.devname);
	else {
		mi = xmalloc(sizeof(*mi));
		*mi = mis;
		mi->devname = mis.devname ? xstrdup(mis.devname) : NULL;
		mi->next = NULL;
		*mddevlp = mi;
		mddevlp = &mi->next;
	}
}

static char *alert_email = NULL;
void mailline(char *line)
{
	char *w;

	for (w = dl_next(line); w != line; w = dl_next(w))
		if (alert_email == NULL)
			alert_email = xstrdup(w);
}

static char *alert_mail_from = NULL;
void mailfromline(char *line)
{
	char *w;

	for (w = dl_next(line); w != line; w = dl_next(w)) {
		if (alert_mail_from == NULL)
			alert_mail_from = xstrdup(w);
		else {
			char *t = NULL;

			if (xasprintf(&t, "%s %s", alert_mail_from, w) > 0) {
				free(alert_mail_from);
				alert_mail_from = t;
			}
		}
	}
}

static char *alert_program = NULL;
void programline(char *line)
{
	char *w;

	for (w = dl_next(line); w != line; w = dl_next(w))
		if (alert_program == NULL)
			alert_program = xstrdup(w);
}

static char *home_host = NULL;
static int require_homehost = 1;
void homehostline(char *line)
{
	char *w;

	for (w = dl_next(line); w != line; w = dl_next(w)) {
		if (is_devname_ignore(w) == true)
			require_homehost = 0;
		else if (home_host == NULL) {
			if (strcasecmp(w, "<none>") == 0)
				home_host = xstrdup("");
			else
				home_host = xstrdup(w);
		}
	}
}

static char *home_cluster = NULL;
void homeclusterline(char *line)
{
	char *w;

	for (w = dl_next(line); w != line; w = dl_next(w)) {
		if (home_cluster == NULL) {
			if (strcasecmp(w, "<none>") == 0)
				home_cluster = xstrdup("");
			else
				home_cluster = xstrdup(w);
		}
	}
}

static int monitor_delay;
void monitordelayline(char *line)
{
	char *w;

	for (w = dl_next(line); w != line; w = dl_next(w)) {
		if (monitor_delay == 0)
			monitor_delay = strtol(w, NULL, 10);
	}
}

char auto_yes[] = "yes";
char auto_no[] = "no";
char auto_homehost[] = "homehost";

static int auto_seen = 0;
void autoline(char *line)
{
	char *w;
	char *seen;
	int super_cnt;
	char *dflt = auto_yes;
	int homehost = 0;
	int i;

	if (auto_seen)
		return;
	auto_seen = 1;

	/*
	 * Parse the 'auto' line creating policy statements for the 'auto'
	 * policy.
	 *
	 * The default is 'yes' but the 'auto' line might over-ride that.
	 * Words in the line are processed in order with the first
	 * match winning.
	 * word can be:
	 *   +version   - that version can be assembled
	 *   -version   - that version cannot be auto-assembled
	 *   yes or +all - any other version can be assembled
	 *   no or -all  - no other version can be assembled.
	 *   homehost   - any array associated by 'homehost' to this
	 *                host can be assembled.
	 *
	 * Thus:
	 *   +ddf -0.90 homehost -all
	 * will auto-assemble any ddf array, no 0.90 array, and
	 * any other array (imsm, 1.x) if and only if it is identified
	 * as belonging to this host.
	 *
	 * We translate that to policy by creating 'auto=yes' when we see
	 * a '+version' line, 'auto=no' if we see '-version' before 'homehost',
	 * or 'auto=homehost' if we see '-version' after 'homehost'.
	 * When we see yes, no, +all or -all we stop and any version that hasn't
	 * been seen gets an appropriate auto= entry.
	 */

	/*
	 * If environment variable MDADM_CONF_AUTO is defined, then
	 * it is prepended to the auto line.  This allow a script
	 * to easily disable some metadata types.
	 */
	w = getenv("MDADM_CONF_AUTO");
	if (w && *w) {
		char *l = xstrdup(w);
		char *head = line;
		w = strtok(l, " \t");
		while (w) {
			char *nw = dl_strdup(w);
			dl_insert(head, nw);
			head = nw;
			w = strtok(NULL, " \t");
		}
		free(l);
	}

	for (super_cnt = 0; superlist[super_cnt]; super_cnt++)
		;
	seen = xcalloc(super_cnt, 1);

	for (w = dl_next(line); w != line; w = dl_next(w)) {
		char *val;

		if (strcasecmp(w, "yes") == 0) {
			dflt = auto_yes;
			break;
		}
		if (strcasecmp(w, "no") == 0) {
			if (homehost)
				dflt = auto_homehost;
			else
				dflt = auto_no;
			break;
		}
		if (strcasecmp(w, "homehost") == 0) {
			homehost = 1;
			continue;
		}
		if (w[0] == '+')
			val = auto_yes;
		else if (w[0] == '-') {
			if (homehost)
				val = auto_homehost;
			else
				val = auto_no;
		} else
			continue;

		if (strcasecmp(w + 1, "all") == 0) {
			dflt = val;
			break;
		}
		for (i = 0; superlist[i]; i++) {
			const char *version = superlist[i]->name;
			if (strcasecmp(w + 1, version) == 0)
				break;
			/* 1 matches 1.x, 0 matches 0.90 */
			if (version[1] == '.' && strlen(w + 1) == 1 &&
			    w[1] == version[0])
				break;
			/* 1.anything matches 1.x */
			if (strcmp(version, "1.x") == 0 &&
			    strncmp(w + 1, "1.", 2) == 0)
				break;
		}
		if (superlist[i] == NULL)
			/* ignore this word */
			continue;
		if (seen[i])
			/* already know about this metadata */
			continue;
		policy_add(rule_policy, pol_auto, val, pol_metadata,
			   superlist[i]->name, NULL);
		seen[i] = 1;
	}
	for (i = 0; i < super_cnt; i++)
		if (!seen[i])
			policy_add(rule_policy, pol_auto, dflt, pol_metadata,
				   superlist[i]->name, NULL);

	free(seen);
}

int loaded = 0;

static char *conffile = NULL;
void set_conffile(char *file)
{
	conffile = file;
}

void conf_file(FILE *f)
{
	char *line;
	while ((line = conf_line(f))) {
		switch(match_keyword(line)) {
		case Devices:
			devline(line);
			break;
		case Array:
			arrayline(line);
			break;
		case Mailaddr:
			mailline(line);
			break;
		case Mailfrom:
			mailfromline(line);
			break;
		case Program:
			programline(line);
			break;
		case CreateDev:
			createline(line);
			break;
		case Homehost:
			homehostline(line);
			break;
		case HomeCluster:
			homeclusterline(line);
			break;
		case AutoMode:
			autoline(line);
			break;
		case Policy:
			policyline(line, rule_policy);
			break;
		case PartPolicy:
			policyline(line, rule_part);
			break;
		case Sysfs:
			sysfsline(line);
			break;
		case MonitorDelay:
			monitordelayline(line);
			break;
		default:
			pr_err("Unknown keyword %s\n", line);
		}
		free_line(line);
	}
}

struct fname {
	struct fname *next;
	char name[];
};

void conf_file_or_dir(FILE *f)
{
	struct stat st;
	DIR *dir;
	struct dirent *dp;
	struct fname *list = NULL;

	fstat(fileno(f), &st);
	if (S_ISREG(st.st_mode))
		conf_file(f);
	else if (!S_ISDIR(st.st_mode))
		return;
#if _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
	dir = fdopendir(fileno(f));
	if (!dir)
		return;
	while ((dp = readdir(dir)) != NULL) {
		int l;
		struct fname *fn, **p;
		if (dp->d_ino == 0)
			continue;
		if (dp->d_name[0] == '.')
			continue;
		l = strlen(dp->d_name);
		if (l < 6 || strcmp(dp->d_name + l - 5, ".conf") != 0)
			continue;
		fn = xmalloc(sizeof(*fn) + l + 1);
		strcpy(fn->name, dp->d_name);
		for (p = &list;
		     *p && strcmp((*p)->name, fn->name) < 0;
		     p = & (*p)->next)
			;
		fn->next = *p;
		*p = fn;
	}
	while (list) {
		int fd;
		FILE *f2;
		struct fname *fn = list;
		list = list->next;
		fd = openat(fileno(f), fn->name, O_RDONLY);
		free(fn);
		if (fd < 0)
			continue;
		f2 = fdopen(fd, "r");
		if (!f2) {
			close(fd);
			continue;
		}
		conf_file(f2);
		fclose(f2);
	}
	closedir(dir);
#endif
}

void load_conffile(void)
{
	FILE *f;
	char *confdir = NULL;
	char *head;

	if (loaded)
		return;
	if (conffile == NULL) {
		conffile = DefaultConfFile;
		confdir = DefaultConfDir;
	}

	if (strcmp(conffile, "partitions") == 0) {
		char *list = dl_strdup("DEV");
		dl_init(list);
		dl_add(list, dl_strdup("partitions"));
		devline(list);
		free_line(list);
	} else if (strcmp(conffile, "none") != 0) {
		f = fopen(conffile, "r");
		/* Debian chose to relocate mdadm.conf into /etc/mdadm/.
		 * To allow Debian users to compile from clean source and still
		 * have a working mdadm, we read /etc/mdadm/mdadm.conf
		 * if /etc/mdadm.conf doesn't exist
		 */
		if (f == NULL && conffile == DefaultConfFile) {
			f = fopen(DefaultAltConfFile, "r");
			if (f) {
				conffile = DefaultAltConfFile;
				confdir = DefaultAltConfDir;
			}
		}
		if (f) {
			conf_file_or_dir(f);
			fclose(f);
		}
		if (confdir) {
			f = fopen(confdir, "r");
			if (f) {
				conf_file_or_dir(f);
				fclose(f);
			}
		}
	}
	/* If there was no AUTO line, process an empty line
	 * now so that the MDADM_CONF_AUTO env var gets processed.
	 */
	head = dl_strdup("AUTO");
	dl_init(head);
	autoline(head);
	free_line(head);

	loaded = 1;
}

char *conf_get_mailaddr(void)
{
	load_conffile();
	return alert_email;
}

char *conf_get_mailfrom(void)
{
	load_conffile();
	return alert_mail_from;
}

char *conf_get_program(void)
{
	load_conffile();
	return alert_program;
}

char *conf_get_homehost(int *require_homehostp)
{
	load_conffile();
	if (require_homehostp)
		*require_homehostp = require_homehost;
	return home_host;
}

char *conf_get_homecluster(void)
{
	load_conffile();
	return home_cluster;
}

int conf_get_monitor_delay(void)
{
	load_conffile();
	return monitor_delay;
}

struct createinfo *conf_get_create_info(void)
{
	load_conffile();
	return &createinfo;
}

struct mddev_ident *conf_get_ident(char *dev)
{
	struct mddev_ident *rv;
	load_conffile();
	rv = mddevlist;
	while (dev && rv && (rv->devname == NULL ||
			     !devname_matches(dev, rv->devname)))
		rv = rv->next;
	return rv;
}

static void append_dlist(struct mddev_dev **dlp, struct mddev_dev *list)
{
	while (*dlp)
		dlp = &(*dlp)->next;
	*dlp = list;
}

struct mddev_dev *conf_get_devs()
{
	glob_t globbuf;
	struct conf_dev *cd;
	int flags = 0;
	static struct mddev_dev *dlist = NULL;
	unsigned int i;

	while (dlist) {
		struct mddev_dev *t = dlist;
		dlist = dlist->next;
		free(t->devname);
		free(t);
	}

	load_conffile();

	if (cdevlist == NULL) {
		/* default to 'partitions' and 'containers' */
		dlist = load_partitions();
		append_dlist(&dlist, load_containers());
	}

	for (cd = cdevlist; cd; cd = cd->next) {
		if (strcasecmp(cd->name, "partitions") == 0)
			append_dlist(&dlist, load_partitions());
		else if (strcasecmp(cd->name, "containers") == 0)
			append_dlist(&dlist, load_containers());
		else {
			glob(cd->name, flags, NULL, &globbuf);
			flags |= GLOB_APPEND;
		}
	}
	if (flags & GLOB_APPEND) {
		for (i = 0; i < globbuf.gl_pathc; i++) {
			struct mddev_dev *t;
			t = xcalloc(1, sizeof(*t));
			t->devname = xstrdup(globbuf.gl_pathv[i]);
			t->next = dlist;
			dlist = t;
/*	printf("one dev is %s\n", t->devname);*/
		}
		globfree(&globbuf);
	}

	return dlist;
}

int conf_test_dev(char *devname)
{
	struct conf_dev *cd;
	if (cdevlist == NULL)
		/* allow anything by default */
		return 1;
	for (cd = cdevlist; cd; cd = cd->next) {
		if (strcasecmp(cd->name, "partitions") == 0)
			return 1;
		if (fnmatch(cd->name, devname, FNM_PATHNAME) == 0)
			return 1;
	}
	return 0;
}

int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost)
{
	/* If anyone said 'yes', that sticks.
	 * else if homehost applies, use that
	 * else if there is a 'no', say 'no'.
	 * else 'yes'.
	 */
	struct dev_policy *p;
	int no = 0, found_homehost = 0;
	load_conffile();

	pol = pol_find(pol, pol_auto);
	pol_for_each(p, pol, version) {
		if (strcmp(p->value, "yes") == 0)
			return 1;
		if (strcmp(p->value, "homehost") == 0)
			found_homehost = 1;
		if (strcmp(p->value, "no") == 0)
			no = 1;
	}
	if (is_homehost && found_homehost)
		return 1;
	if (no)
		return 0;
	return 1;
}

int match_oneof(char *devices, char *devname)
{
	/* check if one of the comma separated patterns in devices
	 * matches devname
	 */

	while (devices && *devices) {
		char patn[1024];
		char *p = devices;
		devices = strchr(devices, ',');
		if (!devices)
			devices = p + strlen(p);
		if (devices-p < 1024) {
			strncpy(patn, p, devices - p);
			patn[devices-p] = 0;
			if (fnmatch(patn, devname, FNM_PATHNAME) == 0)
				return 1;
		}
		if (*devices == ',')
			devices++;
	}
	return 0;
}

int devname_matches(char *name, char *match)
{
	/* See if the given array name matches the
	 * given match from config file.
	 *
	 * First strip and /dev/md/ or /dev/, then
	 * see if there might be a numeric match of
	 *  mdNN with NN
	 * then just strcmp
	 */
	if (strncmp(name, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0)
		name += DEV_MD_DIR_LEN;
	else if (strncmp(name, "/dev/", 5) == 0)
		name += 5;

	if (strncmp(match, DEV_MD_DIR, DEV_MD_DIR_LEN) == 0)
		match += DEV_MD_DIR_LEN;
	else if (strncmp(match, "/dev/", 5) == 0)
		match += 5;

	if (strncmp(name, "md", 2) == 0 && isdigit(name[2]))
		name += 2;
	if (strncmp(match, "md", 2) == 0 && isdigit(match[2]))
		match += 2;

	return (strcmp(name, match) == 0);
}

int conf_name_is_free(char *name)
{
	/* Check if this name is already taken by an ARRAY entry in
	 * the config file.
	 * It can be taken either by a match on devname, name, or
	 * even super-minor.
	 */
	struct mddev_ident *dev;

	load_conffile();
	for (dev = mddevlist; dev; dev = dev->next) {
		char nbuf[100];
		if (dev->devname && devname_matches(name, dev->devname))
			return 0;
		if (dev->name[0] && devname_matches(name, dev->name))
			return 0;
		sprintf(nbuf, "%d", dev->super_minor);
		if (dev->super_minor != UnSet && devname_matches(name, nbuf))
			return 0;
	}
	return 1;
}

struct mddev_ident *conf_match(struct supertype *st,
			       struct mdinfo *info,
			       char *devname,
			       int verbose, int *rvp)
{
	struct mddev_ident *array_list, *match;
	array_list = conf_get_ident(NULL);
	match = NULL;
	for (; array_list; array_list = array_list->next) {
		if (array_list->uuid_set &&
		    same_uuid(array_list->uuid, info->uuid,
			      st->ss->swapuuid) == 0) {
			if (verbose >= 2 && array_list->devname)
				pr_err("UUID differs from %s.\n",
				       array_list->devname);
			continue;
		}
		if (array_list->name[0] &&
		    strcasecmp(array_list->name, info->name) != 0) {
			if (verbose >= 2 && array_list->devname)
				pr_err("Name differs from %s.\n",
				       array_list->devname);
			continue;
		}
		if (array_list->devices && devname &&
		    !match_oneof(array_list->devices, devname)) {
			if (verbose >= 2 && array_list->devname)
				pr_err("Not a listed device for %s.\n",
				       array_list->devname);
			continue;
		}
		if (array_list->super_minor != UnSet &&
		    array_list->super_minor != info->array.md_minor) {
			if (verbose >= 2 && array_list->devname)
				pr_err("Different super-minor to %s.\n",
				       array_list->devname);
			continue;
		}
		if (!array_list->uuid_set && !array_list->name[0] &&
		    !array_list->devices && array_list->super_minor == UnSet) {
			if (verbose >= 2 && array_list->devname)
				pr_err("%s doesn't have any identifying information.\n",
				       array_list->devname);
			continue;
		}
		/* FIXME, should I check raid_disks and level too?? */

		if (match) {
			if (verbose >= 0) {
				if (match->devname && array_list->devname)
					pr_err("we match both %s and %s - cannot decide which to use.\n",
					       match->devname,
					       array_list->devname);
				else
					pr_err("multiple lines in mdadm.conf match\n");
			}
			if (rvp)
				*rvp = 2;
			match = NULL;
			break;
		}
		match = array_list;
	}
	return match;
}

int conf_verify_devnames(struct mddev_ident *array_list)
{
	struct mddev_ident *a1, *a2;

	for (a1 = array_list; a1; a1 = a1->next) {
		if (!a1->devname)
			continue;
		if (strcmp(a1->devname, "<ignore>") == 0)
			continue;
		for (a2 = a1->next; a2; a2 = a2->next) {
			if (!a2->devname)
				continue;
			if (strcmp(a1->devname, a2->devname) != 0)
				continue;

			if (a1->uuid_set && a2->uuid_set) {
				char nbuf[64];
				__fname_from_uuid(a1->uuid, 0, nbuf, ':');
				pr_err("Devices %s and ",
				       nbuf);
				__fname_from_uuid(a2->uuid, 0, nbuf, ':');
				fprintf(stderr,
					"%s have the same name: %s\n",
					nbuf, a1->devname);
			} else
				pr_err("Device %s given twice in config file\n", a1->devname);
			return 1;
		}
	}

	return 0;
}