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Makefile: Add mdmon header dependencies
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64c4757e 1/*
9a9dab36 2 * mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e 3 *
4f589ad0 4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
64c4757e
NB
5 *
6 *
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.
11 *
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.
16 *
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
20 *
21 * Author: Neil Brown
22 * Email: <neilb@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 */
29
4ccdb956 30#define _GNU_SOURCE
c2c9bb6f 31#define _FILE_OFFSET_BITS 64
64c4757e 32#include <unistd.h>
e39b673e 33#if !defined(__dietlibc__) && !defined(__KLIBC__)
64c4757e 34extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
f783ca4f 35#else
fffdbe5e 36# if defined(__NO_STAT64) || __WORDSIZE != 32
f783ca4f
NB
37# define lseek64 lseek
38# endif
98c6faba 39#endif
64c4757e
NB
40
41#include <sys/types.h>
42#include <sys/stat.h>
43#include <stdlib.h>
44#include <time.h>
11018a45 45#include <sys/time.h>
64c4757e
NB
46#include <getopt.h>
47#include <fcntl.h>
48#include <stdio.h>
49#include <errno.h>
50#include <string.h>
773135f5 51#include <syslog.h>
b56c3630
NB
52#ifdef __dietlibc__
53#include <strings.h>
280a927d
NB
54/* dietlibc has deprecated random and srandom!! */
55#define random rand
56#define srandom srand
98c6faba
NB
57#endif
58
64c4757e
NB
59
60#include <linux/kdev_t.h>
e0d19036
NB
61/*#include <linux/fs.h> */
62#include <sys/mount.h>
63#include <asm/types.h>
64c4757e
NB
64#include <sys/ioctl.h>
65#define MD_MAJOR 9
dd0781e5 66#define MdpMinorShift 6
64c4757e 67
e0d19036 68#ifndef BLKGETSIZE64
98c6faba 69#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
e0d19036 70#endif
56eb10c0 71
c82f047c
NB
72#define DEFAULT_BITMAP_CHUNK 4096
73#define DEFAULT_BITMAP_DELAY 5
dfd4d8ee 74#define DEFAULT_MAX_WRITE_BEHIND 256
64c4757e
NB
75
76#include "md_u.h"
e0d19036 77#include "md_p.h"
c82f047c 78#include "bitmap.h"
f7dd881f 79#include "msg.h"
64c4757e 80
1e0d770c 81#include <endian.h>
efd441d1
NB
82/* Redhat don't like to #include <asm/byteorder.h>, and
83 * some time include <linux/byteorder/xxx_endian.h> isn't enough,
84 * and there is no standard conversion function so... */
0ae03b8a
NB
85/* And dietlibc doesn't think byteswap is ok, so.. */
86/* #include <byteswap.h> */
87#define bswap_16(x) (((x) & 0x00ffU) << 8 | \
88 ((x) & 0xff00U) >> 8)
89#define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
90 ((x) & 0xff000000U) >> 24 | \
91 ((x) & 0x0000ff00U) << 8 | \
92 ((x) & 0x00ff0000U) >> 8)
93#define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
94 ((x) & 0xff00000000000000ULL) >> 56 | \
95 ((x) & 0x000000000000ff00ULL) << 40 | \
96 ((x) & 0x00ff000000000000ULL) >> 40 | \
97 ((x) & 0x0000000000ff0000ULL) << 24 | \
98 ((x) & 0x0000ff0000000000ULL) >> 24 | \
99 ((x) & 0x00000000ff000000ULL) << 8 | \
100 ((x) & 0x000000ff00000000ULL) >> 8)
101
e39b673e 102#if !defined(__KLIBC__)
efd441d1
NB
103#if BYTE_ORDER == LITTLE_ENDIAN
104#define __cpu_to_le16(_x) (_x)
105#define __cpu_to_le32(_x) (_x)
106#define __cpu_to_le64(_x) (_x)
107#define __le16_to_cpu(_x) (_x)
108#define __le32_to_cpu(_x) (_x)
109#define __le64_to_cpu(_x) (_x)
974e620d
NB
110
111#define __cpu_to_be16(_x) bswap_16(_x)
112#define __cpu_to_be32(_x) bswap_32(_x)
113#define __cpu_to_be64(_x) bswap_64(_x)
114#define __be16_to_cpu(_x) bswap_16(_x)
115#define __be32_to_cpu(_x) bswap_32(_x)
116#define __be64_to_cpu(_x) bswap_64(_x)
efd441d1
NB
117#elif BYTE_ORDER == BIG_ENDIAN
118#define __cpu_to_le16(_x) bswap_16(_x)
119#define __cpu_to_le32(_x) bswap_32(_x)
120#define __cpu_to_le64(_x) bswap_64(_x)
121#define __le16_to_cpu(_x) bswap_16(_x)
122#define __le32_to_cpu(_x) bswap_32(_x)
123#define __le64_to_cpu(_x) bswap_64(_x)
974e620d
NB
124
125#define __cpu_to_be16(_x) (_x)
126#define __cpu_to_be32(_x) (_x)
127#define __cpu_to_be64(_x) (_x)
128#define __be16_to_cpu(_x) (_x)
129#define __be32_to_cpu(_x) (_x)
130#define __be64_to_cpu(_x) (_x)
1e0d770c
NB
131#else
132# error "unknown endianness."
133#endif
e39b673e 134#endif /* __KLIBC__ */
1e0d770c
NB
135
136
137
4b1ac34b
NB
138/* general information that might be extracted from a superblock */
139struct mdinfo {
140 mdu_array_info_t array;
141 mdu_disk_info_t disk;
142 __u64 events;
fbf8a0b7 143 int uuid[4];
31317663 144 char name[33];
353632d9 145 unsigned long long data_offset;
598f0d58
NB
146 unsigned long long component_size; /* same as array.size, except in
147 * sectors and up to 64bits.
148 */
353632d9
NB
149 int reshape_active;
150 unsigned long long reshape_progress;
0fd5c350 151 unsigned long long resync_start;
353632d9 152 int new_level, delta_disks, new_layout, new_chunk;
06c7f68e 153 int errors;
7e0f6979
NB
154 int cache_size; /* size of raid456 stripe cache*/
155 int mismatch_cnt;
156 char text_version[50];
dd15dc4a
NB
157
158 int container_member; /* for assembling external-metatdata arrays
159 * This is to be used internally by metadata
160 * handler only */
06c7f68e
NB
161
162 char sys_name[20];
7e0f6979 163 struct mdinfo *devs;
06c7f68e 164 struct mdinfo *next;
549e9569
NB
165
166 /* Device info for mdmon: */
167 int state_fd;
8d45d196
DW
168 #define DS_FAULTY 1
169 #define DS_INSYNC 2
170 #define DS_WRITE_MOSTLY 4
171 #define DS_SPARE 8
172 #define DS_BLOCKED 16
173 #define DS_REMOVE 1024
92967543 174 #define DS_UNBLOCK 2048
549e9569
NB
175 int prev_state, curr_state, next_state;
176
4b1ac34b
NB
177};
178
5bbb4842
NB
179struct createinfo {
180 int uid;
181 int gid;
182 int autof;
183 int mode;
38098016 184 int symlinks;
058574b1 185 struct supertype *supertype;
5bbb4842
NB
186};
187
9a9dab36 188#define Name "mdadm"
682c7051 189
e0d19036
NB
190enum mode {
191 ASSEMBLE=1,
192 BUILD,
193 CREATE,
194 MANAGE,
195 MISC,
196 MONITOR,
dd0781e5 197 GROW,
8382f19b 198 INCREMENTAL,
1f48664b 199 AUTODETECT,
e0d19036
NB
200};
201
64c4757e 202extern char short_options[];
024768c4 203extern char short_bitmap_options[];
c06487ce 204extern char short_bitmap_auto_options[];
64c4757e 205extern struct option long_options[];
56eedc1a 206extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5 207 Help_create[], Help_build[], Help_assemble[], Help_grow[],
8382f19b 208 Help_incr[],
e0d19036 209 Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e 210
997aed5d
NB
211/* for option that don't have short equivilents, we assign arbitrary
212 * small numbers. '1' means an undecorated option, so we start at '2'.
213 */
214enum special_options {
215 AssumeClean = 2,
216 BitmapChunk,
217 WriteBehind,
218 ReAdd,
219 NoDegraded,
220 Sparc22,
221 BackupFile,
222 HomeHost,
589395d6 223 AutoHomeHost,
38098016 224 Symlinks,
1f48664b 225 AutoDetect,
997aed5d
NB
226};
227
64c4757e 228/* structures read from config file */
52826846
NB
229/* List of mddevice names and identifiers
230 * Identifiers can be:
231 * uuid=128-hex-uuid
232 * super-minor=decimal-minor-number-from-superblock
233 * devices=comma,separated,list,of,device,names,with,wildcards
234 *
235 * If multiple fields are present, the intersection of all matching
236 * devices is considered
237 */
98c6faba 238#define UnSet (0xfffe)
52826846 239typedef struct mddev_ident_s {
dd0781e5 240 char *devname;
aba69144 241
dd0781e5 242 int uuid_set;
3fa06e9d 243 int uuid[4];
947fd4dd 244 char name[33];
52826846 245
98c6faba 246 unsigned int super_minor;
52826846 247
dd0781e5 248 char *devices; /* comma separated list of device
52826846
NB
249 * names with wild cards
250 */
dd0781e5 251 int level;
98c6faba
NB
252 unsigned int raid_disks;
253 unsigned int spare_disks;
82d9eba6 254 struct supertype *st;
dd0781e5
NB
255 int autof; /* 1 for normal, 2 for partitioned */
256 char *spare_group;
7ef02d01 257 char *bitmap_file;
c82f047c 258 int bitmap_fd;
dd0781e5 259
52826846
NB
260 struct mddev_ident_s *next;
261} *mddev_ident_t;
64c4757e
NB
262
263/* List of device names - wildcards expanded */
264typedef struct mddev_dev_s {
265 char *devname;
cd29a5c8
NB
266 char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
267 * Not set for names read from .config
268 */
dfd4d8ee 269 char writemostly;
fe80f49b 270 char re_add;
811e6cbe 271 char used; /* set when used */
64c4757e
NB
272 struct mddev_dev_s *next;
273} *mddev_dev_t;
274
682c7051
NB
275typedef struct mapping {
276 char *name;
277 int num;
278} mapping_t;
279
e0d19036
NB
280
281struct mdstat_ent {
282 char *dev;
283 int devnum;
284 int active;
285 char *level;
286 char *pattern; /* U or up, _ for down */
287 int percent; /* -1 if no resync */
e5329c37 288 int resync; /* 1 if resync, 0 if recovery */
549e9569
NB
289 int devcnt;
290 int raid_disks;
291 int chunk_size;
292 char * metadata_version;
e0d19036
NB
293 struct mdstat_ent *next;
294};
295
22a88995 296extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036 297extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5 298extern void mdstat_wait(int seconds);
1ed3f387 299extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
8382f19b
NB
300extern int mddev_busy(int devnum);
301
302struct map_ent {
303 struct map_ent *next;
304 int devnum;
1522c538 305 char metadata[20];
8382f19b
NB
306 int uuid[4];
307 char *path;
308};
1522c538 309extern int map_update(struct map_ent **mpp, int devnum, char *metadata,
8382f19b
NB
310 int uuid[4], char *path);
311extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
312extern void map_read(struct map_ent **melp);
313extern int map_write(struct map_ent *mel);
314extern void map_delete(struct map_ent **mapp, int devnum);
315extern void map_free(struct map_ent *map);
316extern void map_add(struct map_ent **melp,
1522c538 317 int devnum, char *metadata, int uuid[4], char *path);
e0d19036 318
e86c9dd6
NB
319/* various details can be requested */
320#define GET_LEVEL 1
321#define GET_LAYOUT 2
322#define GET_COMPONENT 4
323#define GET_CHUNK 8
758d3a8e 324#define GET_CACHE 16
37dfc3d6 325#define GET_MISMATCH 32
8382f19b 326#define GET_VERSION 64
549e9569 327#define GET_DISKS 128
f1d26766 328#define GET_DEGRADED 256
e86c9dd6
NB
329
330#define GET_DEVS 1024 /* gets role, major, minor */
331#define GET_OFFSET 2048
332#define GET_SIZE 4096
333#define GET_STATE 8192
334#define GET_ERROR 16384
335
336/* If fd >= 0, get the array it is open on,
337 * else use devnum. >=0 -> major9. <0.....
338 */
549e9569 339extern int sysfs_open(int devnum, char *devname, char *attr);
7e0f6979
NB
340extern void sysfs_free(struct mdinfo *sra);
341extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
342extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
e86c9dd6 343 char *name, char *val);
7e0f6979 344extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
e86c9dd6 345 char *name, unsigned long long val);
7e0f6979 346extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
e86c9dd6 347 char *name, unsigned long long *val);
2503d23b 348extern int sysfs_set_array(struct mdinfo *sra,
598f0d58 349 struct mdinfo *info);
2318b9f0 350extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd);
f1665f72 351extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
f94d52f4 352extern int sysfs_unique_holder(int devnum, long rdev);
e86c9dd6
NB
353
354
355extern int save_stripes(int *source, unsigned long long *offsets,
356 int raid_disks, int chunk_size, int level, int layout,
357 int nwrites, int *dest,
358 unsigned long long start, unsigned long long length);
353632d9
NB
359extern int restore_stripes(int *dest, unsigned long long *offsets,
360 int raid_disks, int chunk_size, int level, int layout,
361 int source, unsigned long long read_offset,
362 unsigned long long start, unsigned long long length);
e86c9dd6 363
52826846
NB
364#ifndef Sendmail
365#define Sendmail "/usr/lib/sendmail -t"
366#endif
367
773135f5
NB
368#define SYSLOG_FACILITY LOG_DAEMON
369
682c7051
NB
370extern char *map_num(mapping_t *map, int num);
371extern int map_name(mapping_t *map, char *name);
b5e64645 372extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051 373
16c6fa80 374extern char *map_dev(int major, int minor, int create);
64c4757e 375
549e9569 376struct active_array;
2e735d19 377struct metadata_update;
64c4757e 378
6adfd3af
NB
379/* A superswitch provides entry point the a metadata handler.
380 *
381 * The super_switch primarily operates on some "metadata" that
382 * is accessed via the 'supertype'.
383 * This metadata has one of three possible sources.
384 * 1/ It is read from a single device. In this case it may not completely
385 * describe the array or arrays as some information might be on other
386 * devices.
387 * 2/ It is read from all devices in a container. In this case all
388 * information is present.
389 * 3/ It is created by ->init_super / ->add_to_super. In this case it will
390 * be complete once enough ->add_to_super calls have completed.
391 *
392 * When creating an array inside a container, the metadata will be
393 * formed by a combination of 2 and 3. The metadata or the array is read,
394 * then new information is added.
395 *
396 * The metadata must sometimes have a concept of a 'current' array
397 * and a 'current' device.
398 * The 'current' array is set by init_super to be the newly created array,
399 * or is set by super_by_fd when it finds it is looking at an array inside
400 * a container.
401 *
402 * The 'current' device is either the device that the metadata was read from
403 * in case 1, or the last device added by add_to_super in case 3.
404 * Case 2 does not identify a 'current' device.
405 */
f9ce90ba 406extern struct superswitch {
6adfd3af
NB
407
408 /* Used to report details of metadata read from a component
409 * device. ->load_super has been called.
410 */
3da92f27
NB
411 void (*examine_super)(struct supertype *st, char *homehost);
412 void (*brief_examine_super)(struct supertype *st);
0d726f17 413 void (*export_examine_super)(struct supertype *st);
6adfd3af
NB
414
415 /* Used to report details of an active array.
416 * ->load_super was possibly given a 'component' string.
417 */
3da92f27 418 void (*detail_super)(struct supertype *st, char *homehost);
3da92f27 419 void (*brief_detail_super)(struct supertype *st);
0d726f17 420 void (*export_detail_super)(struct supertype *st);
6adfd3af
NB
421
422 /* Used:
423 * to get uuid to storing in bitmap metadata
424 * and 'reshape' backup-data metadata
425 * To see if a device is being re-added to an array it was part of.
426 */
3da92f27 427 void (*uuid_from_super)(struct supertype *st, int uuid[4]);
6adfd3af
NB
428
429 /* Extra generic details from metadata. This could be details about
430 * the container, or about an individual array within the container.
431 * The determination is made either by:
432 * load_super being given a 'component' string.
433 * validate_geometry determining what to create.
d2ca6449
NB
434 * The info includes both array information and device information.
435 * The particular device should be:
436 * The last device added by add_to_super
437 * The device the metadata was loaded from by load_super
6adfd3af 438 */
3da92f27 439 void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
6adfd3af
NB
440
441 /* Check if the given metadata is flagged as belonging to "this"
442 * host. For arrays that don't determine a minor-number, this
443 * can always be true (??)
444 */
3da92f27 445 int (*match_home)(struct supertype *st, char *homehost);
6adfd3af
NB
446
447 /* Make one of several generic modifications to metadata
448 * prior to assembly (or other times).
449 * sparc2.2 - first bug in early 0.90 metadata
450 * super-minor - change name of 0.90 metadata
451 * summaries - 'correct' any redundant data
452 * resync - mark array as dirty to trigger a resync.
453 * uuid - set new uuid - only 0.90 or 1.x
454 * name - change the name of the array (where supported)
455 * homehost - change which host this array is tied to.
456 * devicesize - If metadata is at start of device, change recorded
457 * device size to match actual device size
458 * byteorder - swap bytes for 0.90 metadata
459 *
460 * force-one - mark that device as uptodate, not old or failed.
461 * force-array - mark array as clean if it would not otherwise
462 * assemble
463 * assemble - not sure how this is different from force-one...
464 * linear-grow-new - add a new device to a linear array, but don't
465 * change the size: so superblock still matches
466 * linear-grow-update - now change the size of the array.
467 */
68c7d6d7 468 int (*update_super)(struct supertype *st, struct mdinfo *info,
3da92f27 469 char *update,
e5eac01f
NB
470 char *devname, int verbose,
471 int uuid_set, char *homehost);
6adfd3af
NB
472
473 /* Create new metadata for new array as described. This could
474 * be a new container, or an array in a pre-existing container.
475 * Also used to zero metadata prior to writing it to invalidate old
476 * metadata.
477 */
3da92f27
NB
478 int (*init_super)(struct supertype *st, mdu_array_info_t *info,
479 unsigned long long size, char *name,
480 char *homehost, int *uuid);
6adfd3af
NB
481
482 /* update the metadata to include new device, either at create or
483 * when hot-adding a spare.
484 */
111d01fc
NB
485 void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo,
486 int fd, char *devname);
6adfd3af
NB
487
488 /* Write metadata to one device when fixing problems or adding
489 * a new device.
490 */
3da92f27 491 int (*store_super)(struct supertype *st, int fd);
6adfd3af
NB
492
493 /* Write all metadata for this array.
494 */
111d01fc 495 int (*write_init_super)(struct supertype *st);
64557c33 496 int (*compare_super)(struct supertype *st, struct supertype *tst);
3da92f27 497 int (*load_super)(struct supertype *st, int fd, char *devname);
82d9eba6 498 struct supertype * (*match_metadata_desc)(char *arg);
1bf4e2d9 499 __u64 (*avail_size)(struct supertype *st, __u64 size);
3da92f27 500 int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
199171a2 501 int delay, int write_behind,
f9c25f1d 502 unsigned long long size, int may_change, int major);
3da92f27
NB
503 void (*locate_bitmap)(struct supertype *st, int fd);
504 int (*write_bitmap)(struct supertype *st, int fd);
505 void (*free_super)(struct supertype *st);
78e44928
NB
506
507 /* validate_geometry is called with an st returned by
508 * match_metadata_desc.
509 * It should check that the geometry described in compatible with
510 * the metadata type. It will be called repeatedly as devices
511 * added to validate changing size and new devices. If there are
512 * inter-device dependencies, it should record sufficient details
513 * so these can be validated.
514 */
17f25ca6
NB
515 int (*validate_geometry)(struct supertype *st, int level, int layout,
516 int raiddisks,
517 int chunk, unsigned long long size,
2c514b71
NB
518 char *subdev, unsigned long long *freesize,
519 int verbose);
598f0d58
NB
520
521 struct mdinfo *(*container_content)(struct supertype *st);
522
549e9569 523/* for mdmon */
cba0191b
NB
524 int (*open_new)(struct supertype *c, struct active_array *a,
525 char *inst);
ed9d66aa
NB
526
527 /* Tell the metadata handler the current state of the array.
528 * This covers whether it is known to be consistent (no pending writes)
01f157d7 529 * and how far along a resync is known to have progressed
ed9d66aa
NB
530 * (in a->resync_start).
531 * resync status is really irrelevant if the array is not consistent,
532 * but some metadata (DDF!) have a place to record the distinction.
01f157d7
N
533 * If 'consistent' is '2', then the array can mark it dirty if a
534 * resync/recovery/whatever is required, or leave it clean if not.
535 * Return value is 0 dirty (not consistent) and 1 if clean.
536 * it is only really important if consistent is passed in as '2'.
4e5528c6 537 */
01f157d7 538 int (*set_array_state)(struct active_array *a, int consistent);
7a7cc504
NB
539
540 /* When the state of a device might have changed, we call set_disk to
541 * tell the metadata what the current state is.
542 * Typically this happens on spare->in_sync and (spare|in_sync)->faulty
543 * transitions.
544 * set_disk might be called when the state of the particular disk has
545 * not in fact changed.
546 */
8d45d196 547 void (*set_disk)(struct active_array *a, int n, int state);
2e735d19
NB
548 void (*sync_metadata)(struct supertype *st);
549 void (*process_update)(struct supertype *st,
550 struct metadata_update *update);
edd8d13c
NB
551 void (*prepare_update)(struct supertype *st,
552 struct metadata_update *update);
549e9569 553
6c3fb95c
NB
554 /* activate_spare will check if the array is degraded and, if it
555 * is, try to find some spare space in the container.
556 * On success, it add appropriate updates (For process_update) to
557 * to the 'updates' list and returns a list of 'mdinfo' identifying
558 * the device, or devices as there might be multiple missing
559 * devices and multiple spares available.
560 */
561 struct mdinfo *(*activate_spare)(struct active_array *a,
562 struct metadata_update **updates);
549e9569 563
f277ce36 564 int swapuuid; /* true if uuid is bigending rather than hostendian */
d03373f1 565 int external;
0063ecba 566} super0, super1, super_ddf, *superlist[];
82d9eba6 567
0063ecba 568extern struct superswitch super_imsm;
cdddbdbc 569
edd8d13c
NB
570struct metadata_update {
571 int len;
572 char *buf;
573 void *space; /* allocated space that monitor will use */
574 struct metadata_update *next;
575};
576
6adfd3af
NB
577/* A supertype holds a particular collection of metadata.
578 * It identifies the metadata type by the superswitch, and the particular
579 * sub-version of that metadata type.
580 * metadata read in or created is stored in 'sb' and 'info'.
581 * There are also fields used by mdmon to track containers.
582 *
583 * A supertype is created by:
584 * super_by_fd
585 * guess_super
586 * dup_super
587 */
82d9eba6
NB
588struct supertype {
589 struct superswitch *ss;
590 int minor_version;
ea329559 591 int max_devs;
2f6079dc 592 int container_dev; /* devnum of container */
f7e7067b 593 char subarray[32]; /* name of array inside container */
64557c33 594 void *sb;
111d01fc 595 void *info;
549e9569 596
edd8d13c
NB
597 struct metadata_update *updates;
598 struct metadata_update **update_tail;
599
549e9569
NB
600 /* extra stuff used by mdmon */
601 struct active_array *arrays;
549e9569 602 int sock; /* listen to external programs */
549e9569
NB
603 int devnum;
604 char *devname; /* e.g. md0. This appears in metadata_verison:
605 * external:/md0/12
606 */
607 int devcnt;
e0d6609f 608 char *device_name; /* e.g. /dev/md/whatever */
549e9569
NB
609
610 struct mdinfo *devs;
611
82d9eba6 612};
f9ce90ba 613
1686dc25 614extern struct supertype *super_by_fd(int fd);
82d9eba6 615extern struct supertype *guess_super(int fd);
3da92f27 616extern struct supertype *dup_super(struct supertype *st);
beae1dfe 617extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
8382f19b
NB
618extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
619 mdu_disk_info_t *disk);
f9ce90ba 620
838acbc2
NB
621#if __GNUC__ < 3
622struct stat64;
623#endif
624
45e878bb
NB
625#define HAVE_NFTW we assume
626#define HAVE_FTW
627
173fc515 628#ifdef UCLIBC
45e878bb
NB
629# include <features.h>
630# ifndef __UCLIBC_HAS_FTW__
631# undef HAVE_FTW
632# undef HAVE_NFTW
633# endif
634#endif
635
636#ifdef __dietlibc__
637# undef HAVE_NFTW
638#endif
639
e39b673e 640#if defined(__KLIBC__)
641# undef HAVE_NFTW
642# undef HAVE_FTW
643#endif
644
45e878bb 645#ifndef HAVE_NFTW
173fc515 646# define FTW_PHYS 1
45e878bb
NB
647# ifndef HAVE_FTW
648 struct FTW {};
173fc515
NB
649# endif
650#endif
651
45e878bb
NB
652#ifdef HAVE_FTW
653# include <ftw.h>
654#endif
655
173fc515
NB
656extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
657
f9ce90ba 658
64c4757e 659extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf 660extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5 661extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645 662extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e 663extern int Manage_subdevs(char *devname, int fd,
dab6685f 664 mddev_dev_t devlist, int verbose);
1f48664b 665extern int autodetect(void);
e5329c37 666extern int Grow_Add_device(char *devname, int fd, char *newdev);
8fac0577 667extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
06b0d786 668extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
e86c9dd6
NB
669 long long size,
670 int level, int layout, int chunksize, int raid_disks);
06b0d786
NB
671extern int Grow_restart(struct supertype *st, struct mdinfo *info,
672 int *fdlist, int cnt, char *backup_file);
64c4757e
NB
673
674
82d9eba6 675extern int Assemble(struct supertype *st, char *mddev, int mdfd,
52826846 676 mddev_ident_t ident,
06b0d786 677 mddev_dev_t devlist, char *backup_file,
64c4757e 678 int readonly, int runstop,
e5eac01f 679 char *update, char *homehost,
64c4757e
NB
680 int verbose, int force);
681
b5e64645 682extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e 683 int raiddisks,
c82f047c 684 mddev_dev_t devlist, int assume_clean,
dab6685f 685 char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e
NB
686
687
82d9eba6 688extern int Create(struct supertype *st, char *mddev, int mdfd,
5dd497ee 689 int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
3d3dd91e 690 char *name, char *homehost, int *uuid,
cd29a5c8 691 int subdevs, mddev_dev_t devlist,
47d79ef8 692 int runstop, int verbose, int force, int assume_clean,
dfd4d8ee 693 char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e 694
54bad364 695extern int Detail(char *dev, int brief, int export, int test, char *homehost);
e0d19036 696extern int Query(char *dev);
0d726f17
KS
697extern int Examine(mddev_dev_t devlist, int brief, int export, int scan,
698 int SparcAdjust, struct supertype *forcest, char *homehost);
cd29a5c8 699extern int Monitor(mddev_dev_t devlist,
e0d19036 700 char *mailaddr, char *alert_cmd,
aa88f531 701 int period, int daemonise, int scan, int oneshot,
8aec876d 702 int dosyslog, int test, char *pidfile);
64c4757e 703
111d01fc 704extern int Kill(char *dev, int force, int quiet, int noexcl);
b90c0e9a 705extern int Wait(char *dev);
9a9dab36 706
8382f19b
NB
707extern int Incremental(char *devname, int verbose, int runstop,
708 struct supertype *st, char *homehost, int autof);
598f0d58
NB
709extern int Incremental_container(struct supertype *st, char *devname,
710 int verbose, int runstop, int autof);
8382f19b
NB
711extern void RebuildMap(void);
712extern int IncrementalScan(int verbose);
713
c82f047c
NB
714extern int CreateBitmap(char *filename, int force, char uuid[16],
715 unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee 716 unsigned long write_behind,
dcec9ee5
NB
717 unsigned long long array_size,
718 int major);
55935d51 719extern int ExamineBitmap(char *filename, int brief, struct supertype *st);
bf4fb153 720extern int bitmap_update_uuid(int fd, int *uuid, int swap);
c82f047c 721
64c4757e 722extern int md_get_version(int fd);
e0d19036 723extern int get_linux_version(void);
64c4757e 724extern int parse_uuid(char *str, int uuid[4]);
682c7051
NB
725extern int check_ext2(int fd, char *name);
726extern int check_reiser(int fd, char *name);
727extern int check_raid(int fd, char *name);
64c4757e 728
dd0781e5 729extern int get_mdp_major(void);
8b0dabea 730extern int dev_open(char *dev, int flags);
a931db9e 731extern int open_dev_excl(int devnum);
8d80900b 732extern int is_standard(char *dev, int *nump);
dd0781e5 733
f1ae21c4 734extern int parse_auto(char *str, char *msg, int config);
8aec876d
NB
735extern mddev_ident_t conf_get_ident(char *dev);
736extern mddev_dev_t conf_get_devs(void);
8382f19b 737extern int conf_test_dev(char *devname);
8aec876d
NB
738extern struct createinfo *conf_get_create_info(void);
739extern void set_conffile(char *file);
740extern char *conf_get_mailaddr(void);
741extern char *conf_get_mailfrom(void);
742extern char *conf_get_program(void);
743extern char *conf_get_homehost(void);
e0d19036 744extern char *conf_line(FILE *file);
98c6faba 745extern char *conf_word(FILE *file, int allow_key);
e0d19036
NB
746extern void free_line(char *line);
747extern int match_oneof(char *devices, char *devname);
e0d19036 748extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36 749extern int same_uuid(int a[4], int b[4], int swapuuid);
350f29f9 750extern void copy_uuid(void *a, int b[4], int swapuuid);
4b1ac34b 751extern unsigned long calc_csum(void *super, int bytes);
583315d9 752extern int enough(int level, int raid_disks, int layout, int clean,
265e0f17 753 char *avail, int avail_disks);
e0d19036 754extern int ask(char *mesg);
8fac0577 755extern unsigned long long get_component_size(int fd);
0430ed48 756extern void remove_partitions(int fd);
5f8097be
NB
757extern unsigned long long calc_array_size(int level, int raid_disks, int layout,
758 int chunksize, unsigned long long devsize);
edd8d13c
NB
759extern int flush_metadata_updates(struct supertype *st);
760extern void append_metadata_update(struct supertype *st, void *buf, int len);
e0d19036 761
cd29a5c8 762
56eb10c0 763extern char *human_size(long long bytes);
e0d19036
NB
764char *human_size_brief(long long bytes);
765
63152c1b
NB
766#define NoMdDev (1<<23)
767extern int find_free_devnum(int use_partitions);
768
e0d19036
NB
769extern void put_md_name(char *name);
770extern char *get_md_name(int dev);
771
c913b90e 772extern char DefaultConfFile[];
b5e64645
NB
773
774extern int open_mddev(char *dev, int autof);
8382f19b 775extern int open_mddev_devnum(char *devname, int devnum, char *name,
9a02c62a 776 char *chosen_name, int parts);
a322f70c 777extern int open_container(int fd);
b5e64645 778
a931db9e
NB
779extern int mdmon_running(int devnum);
780extern int signal_mdmon(int devnum);
5dcfcb71 781extern int env_no_mdmon(void);
8850ee3e 782extern int start_mdmon(int devnum);
a931db9e 783
2f6079dc 784extern char *devnum2devname(int num);
77472ff8 785extern int devname2devnum(char *name);
2f6079dc 786extern int fd2devnum(int fd);
b5e64645 787
a931db9e
NB
788static inline int dev2major(int d)
789{
790 if (d >= 0)
791 return MD_MAJOR;
792 else
793 return get_mdp_major();
794}
795
796static inline int dev2minor(int d)
797{
798 if (d >= 0)
799 return d;
800 return (-1-d) << MdpMinorShift;
801}
802
6416d527
NB
803static inline int ROUND_UP(int a, int base)
804{
805 return ((a+base-1)/base)*base;
806}
807
3c558363
N
808static inline int is_subarray(char *vers)
809{
e9dd1598
N
810 /* The version string for a 'subarray' (an array in a container)
811 * is
812 * /containername/componentname for normal read-write arrays
813 * -containername/componentname for read-only arrays.
814 * containername is e.g. md0, md_d1
815 * componentname is dependant on the metadata. e.g. '1' 'S1' ...
816 */
817 return (*vers == '/' || *vers == '-');
3c558363
N
818}
819
b5e64645
NB
820#define LEVEL_MULTIPATH (-4)
821#define LEVEL_LINEAR (-1)
822#define LEVEL_FAULTY (-5)
823
17f25ca6
NB
824/* kernel module doesn't know about these */
825#define LEVEL_CONTAINER (-100)
a322f70c 826#define LEVEL_UNSUPPORTED (-200)
17f25ca6 827
b5e64645
NB
828
829/* faulty stuff */
830
831#define WriteTransient 0
832#define ReadTransient 1
833#define WritePersistent 2
834#define ReadPersistent 3
835#define WriteAll 4 /* doesn't go to device */
836#define ReadFixable 5
837#define Modes 6
838
839#define ClearErrors 31
840#define ClearFaults 30
841
842#define AllPersist 100 /* internal use only */
843#define NoPersist 101
844
845#define ModeMask 0x1f
846#define ModeShift 5
fe6729fa
NB
847
848
849#ifdef __TINYC__
850#undef minor
851#undef major
852#undef makedev
853#define minor(x) ((x)&0xff)
854#define major(x) (((x)>>8)&0xff)
855#define makedev(M,m) (((M)<<8) | (m))
856#endif
857
e86c9dd6
NB
858/* for raid5 */
859#define ALGORITHM_LEFT_ASYMMETRIC 0
860#define ALGORITHM_RIGHT_ASYMMETRIC 1
861#define ALGORITHM_LEFT_SYMMETRIC 2
862#define ALGORITHM_RIGHT_SYMMETRIC 3