Create arrays via metadata-update
[thirdparty/mdadm.git] / mdadm.h
CommitLineData
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
549e9569
NB
174 int prev_state, curr_state, next_state;
175
4b1ac34b
NB
176};
177
5bbb4842
NB
178struct createinfo {
179 int uid;
180 int gid;
181 int autof;
182 int mode;
38098016 183 int symlinks;
058574b1 184 struct supertype *supertype;
5bbb4842
NB
185};
186
9a9dab36 187#define Name "mdadm"
682c7051 188
e0d19036
NB
189enum mode {
190 ASSEMBLE=1,
191 BUILD,
192 CREATE,
193 MANAGE,
194 MISC,
195 MONITOR,
dd0781e5 196 GROW,
8382f19b 197 INCREMENTAL,
1f48664b 198 AUTODETECT,
e0d19036
NB
199};
200
64c4757e 201extern char short_options[];
024768c4 202extern char short_bitmap_options[];
c06487ce 203extern char short_bitmap_auto_options[];
64c4757e 204extern struct option long_options[];
56eedc1a 205extern char Version[], Usage[], Help[], OptionHelp[],
dd0781e5 206 Help_create[], Help_build[], Help_assemble[], Help_grow[],
8382f19b 207 Help_incr[],
e0d19036 208 Help_manage[], Help_misc[], Help_monitor[], Help_config[];
64c4757e 209
997aed5d
NB
210/* for option that don't have short equivilents, we assign arbitrary
211 * small numbers. '1' means an undecorated option, so we start at '2'.
212 */
213enum special_options {
214 AssumeClean = 2,
215 BitmapChunk,
216 WriteBehind,
217 ReAdd,
218 NoDegraded,
219 Sparc22,
220 BackupFile,
221 HomeHost,
589395d6 222 AutoHomeHost,
38098016 223 Symlinks,
1f48664b 224 AutoDetect,
997aed5d
NB
225};
226
64c4757e 227/* structures read from config file */
52826846
NB
228/* List of mddevice names and identifiers
229 * Identifiers can be:
230 * uuid=128-hex-uuid
231 * super-minor=decimal-minor-number-from-superblock
232 * devices=comma,separated,list,of,device,names,with,wildcards
233 *
234 * If multiple fields are present, the intersection of all matching
235 * devices is considered
236 */
98c6faba 237#define UnSet (0xfffe)
52826846 238typedef struct mddev_ident_s {
dd0781e5 239 char *devname;
aba69144 240
dd0781e5 241 int uuid_set;
3fa06e9d 242 int uuid[4];
947fd4dd 243 char name[33];
52826846 244
98c6faba 245 unsigned int super_minor;
52826846 246
dd0781e5 247 char *devices; /* comma separated list of device
52826846
NB
248 * names with wild cards
249 */
dd0781e5 250 int level;
98c6faba
NB
251 unsigned int raid_disks;
252 unsigned int spare_disks;
82d9eba6 253 struct supertype *st;
dd0781e5
NB
254 int autof; /* 1 for normal, 2 for partitioned */
255 char *spare_group;
7ef02d01 256 char *bitmap_file;
c82f047c 257 int bitmap_fd;
dd0781e5 258
52826846
NB
259 struct mddev_ident_s *next;
260} *mddev_ident_t;
64c4757e
NB
261
262/* List of device names - wildcards expanded */
263typedef struct mddev_dev_s {
264 char *devname;
cd29a5c8
NB
265 char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
266 * Not set for names read from .config
267 */
dfd4d8ee 268 char writemostly;
fe80f49b 269 char re_add;
811e6cbe 270 char used; /* set when used */
64c4757e
NB
271 struct mddev_dev_s *next;
272} *mddev_dev_t;
273
682c7051
NB
274typedef struct mapping {
275 char *name;
276 int num;
277} mapping_t;
278
e0d19036
NB
279
280struct mdstat_ent {
281 char *dev;
282 int devnum;
283 int active;
284 char *level;
285 char *pattern; /* U or up, _ for down */
286 int percent; /* -1 if no resync */
e5329c37 287 int resync; /* 1 if resync, 0 if recovery */
549e9569
NB
288 int devcnt;
289 int raid_disks;
290 int chunk_size;
291 char * metadata_version;
e0d19036
NB
292 struct mdstat_ent *next;
293};
294
22a88995 295extern struct mdstat_ent *mdstat_read(int hold, int start);
e0d19036 296extern void free_mdstat(struct mdstat_ent *ms);
dd0781e5 297extern void mdstat_wait(int seconds);
1ed3f387 298extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
8382f19b
NB
299extern int mddev_busy(int devnum);
300
301struct map_ent {
302 struct map_ent *next;
303 int devnum;
1522c538 304 char metadata[20];
8382f19b
NB
305 int uuid[4];
306 char *path;
307};
1522c538 308extern int map_update(struct map_ent **mpp, int devnum, char *metadata,
8382f19b
NB
309 int uuid[4], char *path);
310extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
311extern void map_read(struct map_ent **melp);
312extern int map_write(struct map_ent *mel);
313extern void map_delete(struct map_ent **mapp, int devnum);
314extern void map_free(struct map_ent *map);
315extern void map_add(struct map_ent **melp,
1522c538 316 int devnum, char *metadata, int uuid[4], char *path);
e0d19036 317
e86c9dd6
NB
318/* various details can be requested */
319#define GET_LEVEL 1
320#define GET_LAYOUT 2
321#define GET_COMPONENT 4
322#define GET_CHUNK 8
758d3a8e 323#define GET_CACHE 16
37dfc3d6 324#define GET_MISMATCH 32
8382f19b 325#define GET_VERSION 64
549e9569 326#define GET_DISKS 128
e86c9dd6
NB
327
328#define GET_DEVS 1024 /* gets role, major, minor */
329#define GET_OFFSET 2048
330#define GET_SIZE 4096
331#define GET_STATE 8192
332#define GET_ERROR 16384
333
334/* If fd >= 0, get the array it is open on,
335 * else use devnum. >=0 -> major9. <0.....
336 */
549e9569 337extern int sysfs_open(int devnum, char *devname, char *attr);
7e0f6979
NB
338extern void sysfs_free(struct mdinfo *sra);
339extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
340extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
e86c9dd6 341 char *name, char *val);
7e0f6979 342extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
e86c9dd6 343 char *name, unsigned long long val);
7e0f6979 344extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
e86c9dd6 345 char *name, unsigned long long *val);
2503d23b 346extern int sysfs_set_array(struct mdinfo *sra,
598f0d58 347 struct mdinfo *info);
2318b9f0 348extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd);
90c8b707 349extern int sysfs_disk_to_sg(int fd);
f1665f72 350extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
f94d52f4 351extern int sysfs_unique_holder(int devnum, long rdev);
e86c9dd6
NB
352
353
354extern int save_stripes(int *source, unsigned long long *offsets,
355 int raid_disks, int chunk_size, int level, int layout,
356 int nwrites, int *dest,
357 unsigned long long start, unsigned long long length);
353632d9
NB
358extern int restore_stripes(int *dest, unsigned long long *offsets,
359 int raid_disks, int chunk_size, int level, int layout,
360 int source, unsigned long long read_offset,
361 unsigned long long start, unsigned long long length);
e86c9dd6 362
52826846
NB
363#ifndef Sendmail
364#define Sendmail "/usr/lib/sendmail -t"
365#endif
366
773135f5
NB
367#define SYSLOG_FACILITY LOG_DAEMON
368
682c7051
NB
369extern char *map_num(mapping_t *map, int num);
370extern int map_name(mapping_t *map, char *name);
b5e64645 371extern mapping_t r5layout[], pers[], modes[], faultylayout[];
682c7051 372
16c6fa80 373extern char *map_dev(int major, int minor, int create);
64c4757e 374
549e9569 375struct active_array;
2e735d19 376struct metadata_update;
64c4757e 377
6adfd3af
NB
378/* A superswitch provides entry point the a metadata handler.
379 *
380 * The super_switch primarily operates on some "metadata" that
381 * is accessed via the 'supertype'.
382 * This metadata has one of three possible sources.
383 * 1/ It is read from a single device. In this case it may not completely
384 * describe the array or arrays as some information might be on other
385 * devices.
386 * 2/ It is read from all devices in a container. In this case all
387 * information is present.
388 * 3/ It is created by ->init_super / ->add_to_super. In this case it will
389 * be complete once enough ->add_to_super calls have completed.
390 *
391 * When creating an array inside a container, the metadata will be
392 * formed by a combination of 2 and 3. The metadata or the array is read,
393 * then new information is added.
394 *
395 * The metadata must sometimes have a concept of a 'current' array
396 * and a 'current' device.
397 * The 'current' array is set by init_super to be the newly created array,
398 * or is set by super_by_fd when it finds it is looking at an array inside
399 * a container.
400 *
401 * The 'current' device is either the device that the metadata was read from
402 * in case 1, or the last device added by add_to_super in case 3.
403 * Case 2 does not identify a 'current' device.
404 */
f9ce90ba 405extern struct superswitch {
6adfd3af
NB
406
407 /* Used to report details of metadata read from a component
408 * device. ->load_super has been called.
409 */
3da92f27
NB
410 void (*examine_super)(struct supertype *st, char *homehost);
411 void (*brief_examine_super)(struct supertype *st);
0d726f17 412 void (*export_examine_super)(struct supertype *st);
6adfd3af
NB
413
414 /* Used to report details of an active array.
415 * ->load_super was possibly given a 'component' string.
416 */
3da92f27 417 void (*detail_super)(struct supertype *st, char *homehost);
3da92f27 418 void (*brief_detail_super)(struct supertype *st);
0d726f17 419 void (*export_detail_super)(struct supertype *st);
6adfd3af
NB
420
421 /* Used:
422 * to get uuid to storing in bitmap metadata
423 * and 'reshape' backup-data metadata
424 * To see if a device is being re-added to an array it was part of.
425 */
3da92f27 426 void (*uuid_from_super)(struct supertype *st, int uuid[4]);
6adfd3af
NB
427
428 /* Extra generic details from metadata. This could be details about
429 * the container, or about an individual array within the container.
430 * The determination is made either by:
431 * load_super being given a 'component' string.
432 * validate_geometry determining what to create.
d2ca6449
NB
433 * The info includes both array information and device information.
434 * The particular device should be:
435 * The last device added by add_to_super
436 * The device the metadata was loaded from by load_super
6adfd3af 437 */
3da92f27 438 void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
6adfd3af
NB
439
440 /* Check if the given metadata is flagged as belonging to "this"
441 * host. For arrays that don't determine a minor-number, this
442 * can always be true (??)
443 */
3da92f27 444 int (*match_home)(struct supertype *st, char *homehost);
6adfd3af
NB
445
446 /* Make one of several generic modifications to metadata
447 * prior to assembly (or other times).
448 * sparc2.2 - first bug in early 0.90 metadata
449 * super-minor - change name of 0.90 metadata
450 * summaries - 'correct' any redundant data
451 * resync - mark array as dirty to trigger a resync.
452 * uuid - set new uuid - only 0.90 or 1.x
453 * name - change the name of the array (where supported)
454 * homehost - change which host this array is tied to.
455 * devicesize - If metadata is at start of device, change recorded
456 * device size to match actual device size
457 * byteorder - swap bytes for 0.90 metadata
458 *
459 * force-one - mark that device as uptodate, not old or failed.
460 * force-array - mark array as clean if it would not otherwise
461 * assemble
462 * assemble - not sure how this is different from force-one...
463 * linear-grow-new - add a new device to a linear array, but don't
464 * change the size: so superblock still matches
465 * linear-grow-update - now change the size of the array.
466 */
68c7d6d7 467 int (*update_super)(struct supertype *st, struct mdinfo *info,
3da92f27 468 char *update,
e5eac01f
NB
469 char *devname, int verbose,
470 int uuid_set, char *homehost);
6adfd3af
NB
471
472 /* Create new metadata for new array as described. This could
473 * be a new container, or an array in a pre-existing container.
474 * Also used to zero metadata prior to writing it to invalidate old
475 * metadata.
476 */
3da92f27
NB
477 int (*init_super)(struct supertype *st, mdu_array_info_t *info,
478 unsigned long long size, char *name,
479 char *homehost, int *uuid);
6adfd3af
NB
480
481 /* update the metadata to include new device, either at create or
482 * when hot-adding a spare.
483 */
111d01fc
NB
484 void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo,
485 int fd, char *devname);
6adfd3af
NB
486
487 /* Write metadata to one device when fixing problems or adding
488 * a new device.
489 */
3da92f27 490 int (*store_super)(struct supertype *st, int fd);
6adfd3af
NB
491
492 /* Write all metadata for this array.
493 */
111d01fc 494 int (*write_init_super)(struct supertype *st);
64557c33 495 int (*compare_super)(struct supertype *st, struct supertype *tst);
3da92f27 496 int (*load_super)(struct supertype *st, int fd, char *devname);
82d9eba6 497 struct supertype * (*match_metadata_desc)(char *arg);
1bf4e2d9 498 __u64 (*avail_size)(struct supertype *st, __u64 size);
3da92f27 499 int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
199171a2 500 int delay, int write_behind,
f9c25f1d 501 unsigned long long size, int may_change, int major);
3da92f27
NB
502 void (*locate_bitmap)(struct supertype *st, int fd);
503 int (*write_bitmap)(struct supertype *st, int fd);
504 void (*free_super)(struct supertype *st);
78e44928
NB
505
506 /* validate_geometry is called with an st returned by
507 * match_metadata_desc.
508 * It should check that the geometry described in compatible with
509 * the metadata type. It will be called repeatedly as devices
510 * added to validate changing size and new devices. If there are
511 * inter-device dependencies, it should record sufficient details
512 * so these can be validated.
513 */
17f25ca6
NB
514 int (*validate_geometry)(struct supertype *st, int level, int layout,
515 int raiddisks,
516 int chunk, unsigned long long size,
517 char *subdev, unsigned long long *freesize);
598f0d58
NB
518
519 struct mdinfo *(*container_content)(struct supertype *st);
520
549e9569 521/* for mdmon */
cba0191b
NB
522 int (*open_new)(struct supertype *c, struct active_array *a,
523 char *inst);
ed9d66aa
NB
524
525 /* Tell the metadata handler the current state of the array.
526 * This covers whether it is known to be consistent (no pending writes)
527 * when how far along a resync is known to have progressed
528 * (in a->resync_start).
529 * resync status is really irrelevant if the array is not consistent,
530 * but some metadata (DDF!) have a place to record the distinction.
4e5528c6 531 */
ed9d66aa 532 void (*set_array_state)(struct active_array *a, int consistent);
7a7cc504
NB
533
534 /* When the state of a device might have changed, we call set_disk to
535 * tell the metadata what the current state is.
536 * Typically this happens on spare->in_sync and (spare|in_sync)->faulty
537 * transitions.
538 * set_disk might be called when the state of the particular disk has
539 * not in fact changed.
540 */
8d45d196 541 void (*set_disk)(struct active_array *a, int n, int state);
2e735d19
NB
542 void (*sync_metadata)(struct supertype *st);
543 void (*process_update)(struct supertype *st,
544 struct metadata_update *update);
edd8d13c
NB
545 void (*prepare_update)(struct supertype *st,
546 struct metadata_update *update);
549e9569 547
6c3fb95c
NB
548 /* activate_spare will check if the array is degraded and, if it
549 * is, try to find some spare space in the container.
550 * On success, it add appropriate updates (For process_update) to
551 * to the 'updates' list and returns a list of 'mdinfo' identifying
552 * the device, or devices as there might be multiple missing
553 * devices and multiple spares available.
554 */
555 struct mdinfo *(*activate_spare)(struct active_array *a,
556 struct metadata_update **updates);
549e9569 557
f277ce36 558 int swapuuid; /* true if uuid is bigending rather than hostendian */
d03373f1 559 int external;
0063ecba 560} super0, super1, super_ddf, *superlist[];
82d9eba6 561
0063ecba 562extern struct superswitch super_imsm;
cdddbdbc 563
edd8d13c
NB
564struct metadata_update {
565 int len;
566 char *buf;
567 void *space; /* allocated space that monitor will use */
568 struct metadata_update *next;
569};
570
6adfd3af
NB
571/* A supertype holds a particular collection of metadata.
572 * It identifies the metadata type by the superswitch, and the particular
573 * sub-version of that metadata type.
574 * metadata read in or created is stored in 'sb' and 'info'.
575 * There are also fields used by mdmon to track containers.
576 *
577 * A supertype is created by:
578 * super_by_fd
579 * guess_super
580 * dup_super
581 */
82d9eba6
NB
582struct supertype {
583 struct superswitch *ss;
584 int minor_version;
ea329559 585 int max_devs;
2f6079dc 586 int container_dev; /* devnum of container */
f7e7067b 587 char subarray[32]; /* name of array inside container */
64557c33 588 void *sb;
111d01fc 589 void *info;
549e9569 590
edd8d13c
NB
591 struct metadata_update *updates;
592 struct metadata_update **update_tail;
593
549e9569
NB
594 /* extra stuff used by mdmon */
595 struct active_array *arrays;
549e9569 596 int sock; /* listen to external programs */
549e9569
NB
597 int devnum;
598 char *devname; /* e.g. md0. This appears in metadata_verison:
599 * external:/md0/12
600 */
601 int devcnt;
e0d6609f 602 char *device_name; /* e.g. /dev/md/whatever */
549e9569
NB
603
604 struct mdinfo *devs;
605
82d9eba6 606};
f9ce90ba 607
1686dc25 608extern struct supertype *super_by_fd(int fd);
82d9eba6 609extern struct supertype *guess_super(int fd);
3da92f27 610extern struct supertype *dup_super(struct supertype *st);
beae1dfe 611extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
8382f19b
NB
612extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
613 mdu_disk_info_t *disk);
f9ce90ba 614
838acbc2
NB
615#if __GNUC__ < 3
616struct stat64;
617#endif
618
45e878bb
NB
619#define HAVE_NFTW we assume
620#define HAVE_FTW
621
173fc515 622#ifdef UCLIBC
45e878bb
NB
623# include <features.h>
624# ifndef __UCLIBC_HAS_FTW__
625# undef HAVE_FTW
626# undef HAVE_NFTW
627# endif
628#endif
629
630#ifdef __dietlibc__
631# undef HAVE_NFTW
632#endif
633
e39b673e 634#if defined(__KLIBC__)
635# undef HAVE_NFTW
636# undef HAVE_FTW
637#endif
638
45e878bb 639#ifndef HAVE_NFTW
173fc515 640# define FTW_PHYS 1
45e878bb
NB
641# ifndef HAVE_FTW
642 struct FTW {};
173fc515
NB
643# endif
644#endif
645
45e878bb
NB
646#ifdef HAVE_FTW
647# include <ftw.h>
648#endif
649
173fc515
NB
650extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
651
f9ce90ba 652
64c4757e 653extern int Manage_ro(char *devname, int fd, int readonly);
91f068bf 654extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
dd0781e5 655extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
b5e64645 656extern int Manage_reconfig(char *devname, int fd, int layout);
64c4757e 657extern int Manage_subdevs(char *devname, int fd,
dab6685f 658 mddev_dev_t devlist, int verbose);
1f48664b 659extern int autodetect(void);
e5329c37 660extern int Grow_Add_device(char *devname, int fd, char *newdev);
8fac0577 661extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
06b0d786 662extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
e86c9dd6
NB
663 long long size,
664 int level, int layout, int chunksize, int raid_disks);
06b0d786
NB
665extern int Grow_restart(struct supertype *st, struct mdinfo *info,
666 int *fdlist, int cnt, char *backup_file);
64c4757e
NB
667
668
82d9eba6 669extern int Assemble(struct supertype *st, char *mddev, int mdfd,
52826846 670 mddev_ident_t ident,
06b0d786 671 mddev_dev_t devlist, char *backup_file,
64c4757e 672 int readonly, int runstop,
e5eac01f 673 char *update, char *homehost,
64c4757e
NB
674 int verbose, int force);
675
b5e64645 676extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
64c4757e 677 int raiddisks,
c82f047c 678 mddev_dev_t devlist, int assume_clean,
dab6685f 679 char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
64c4757e
NB
680
681
82d9eba6 682extern int Create(struct supertype *st, char *mddev, int mdfd,
5dd497ee 683 int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
3d3dd91e 684 char *name, char *homehost, int *uuid,
cd29a5c8 685 int subdevs, mddev_dev_t devlist,
47d79ef8 686 int runstop, int verbose, int force, int assume_clean,
dfd4d8ee 687 char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
64c4757e 688
54bad364 689extern int Detail(char *dev, int brief, int export, int test, char *homehost);
e0d19036 690extern int Query(char *dev);
0d726f17
KS
691extern int Examine(mddev_dev_t devlist, int brief, int export, int scan,
692 int SparcAdjust, struct supertype *forcest, char *homehost);
cd29a5c8 693extern int Monitor(mddev_dev_t devlist,
e0d19036 694 char *mailaddr, char *alert_cmd,
aa88f531 695 int period, int daemonise, int scan, int oneshot,
8aec876d 696 int dosyslog, int test, char *pidfile);
64c4757e 697
111d01fc 698extern int Kill(char *dev, int force, int quiet, int noexcl);
b90c0e9a 699extern int Wait(char *dev);
9a9dab36 700
8382f19b
NB
701extern int Incremental(char *devname, int verbose, int runstop,
702 struct supertype *st, char *homehost, int autof);
598f0d58
NB
703extern int Incremental_container(struct supertype *st, char *devname,
704 int verbose, int runstop, int autof);
8382f19b
NB
705extern void RebuildMap(void);
706extern int IncrementalScan(int verbose);
707
c82f047c
NB
708extern int CreateBitmap(char *filename, int force, char uuid[16],
709 unsigned long chunksize, unsigned long daemon_sleep,
dfd4d8ee 710 unsigned long write_behind,
dcec9ee5
NB
711 unsigned long long array_size,
712 int major);
55935d51 713extern int ExamineBitmap(char *filename, int brief, struct supertype *st);
bf4fb153 714extern int bitmap_update_uuid(int fd, int *uuid, int swap);
c82f047c 715
64c4757e 716extern int md_get_version(int fd);
e0d19036 717extern int get_linux_version(void);
64c4757e 718extern int parse_uuid(char *str, int uuid[4]);
682c7051
NB
719extern int check_ext2(int fd, char *name);
720extern int check_reiser(int fd, char *name);
721extern int check_raid(int fd, char *name);
64c4757e 722
dd0781e5 723extern int get_mdp_major(void);
8b0dabea 724extern int dev_open(char *dev, int flags);
a931db9e 725extern int open_dev_excl(int devnum);
8d80900b 726extern int is_standard(char *dev, int *nump);
dd0781e5 727
f1ae21c4 728extern int parse_auto(char *str, char *msg, int config);
8aec876d
NB
729extern mddev_ident_t conf_get_ident(char *dev);
730extern mddev_dev_t conf_get_devs(void);
8382f19b 731extern int conf_test_dev(char *devname);
8aec876d
NB
732extern struct createinfo *conf_get_create_info(void);
733extern void set_conffile(char *file);
734extern char *conf_get_mailaddr(void);
735extern char *conf_get_mailfrom(void);
736extern char *conf_get_program(void);
737extern char *conf_get_homehost(void);
e0d19036 738extern char *conf_line(FILE *file);
98c6faba 739extern char *conf_word(FILE *file, int allow_key);
e0d19036
NB
740extern void free_line(char *line);
741extern int match_oneof(char *devices, char *devname);
e0d19036 742extern void uuid_from_super(int uuid[4], mdp_super_t *super);
f277ce36 743extern int same_uuid(int a[4], int b[4], int swapuuid);
350f29f9 744extern void copy_uuid(void *a, int b[4], int swapuuid);
4b1ac34b 745extern unsigned long calc_csum(void *super, int bytes);
583315d9 746extern int enough(int level, int raid_disks, int layout, int clean,
265e0f17 747 char *avail, int avail_disks);
e0d19036 748extern int ask(char *mesg);
8fac0577 749extern unsigned long long get_component_size(int fd);
0430ed48 750extern void remove_partitions(int fd);
5f8097be
NB
751extern unsigned long long calc_array_size(int level, int raid_disks, int layout,
752 int chunksize, unsigned long long devsize);
edd8d13c
NB
753extern int flush_metadata_updates(struct supertype *st);
754extern void append_metadata_update(struct supertype *st, void *buf, int len);
e0d19036 755
cd29a5c8 756
56eb10c0 757extern char *human_size(long long bytes);
e0d19036
NB
758char *human_size_brief(long long bytes);
759
63152c1b
NB
760#define NoMdDev (1<<23)
761extern int find_free_devnum(int use_partitions);
762
e0d19036
NB
763extern void put_md_name(char *name);
764extern char *get_md_name(int dev);
765
c913b90e 766extern char DefaultConfFile[];
b5e64645
NB
767
768extern int open_mddev(char *dev, int autof);
8382f19b 769extern int open_mddev_devnum(char *devname, int devnum, char *name,
9a02c62a 770 char *chosen_name, int parts);
a322f70c 771extern int open_container(int fd);
b5e64645 772
a931db9e
NB
773extern int mdmon_running(int devnum);
774extern int signal_mdmon(int devnum);
775
2f6079dc
NB
776extern char *devnum2devname(int num);
777extern int fd2devnum(int fd);
b5e64645 778
a931db9e
NB
779static inline int dev2major(int d)
780{
781 if (d >= 0)
782 return MD_MAJOR;
783 else
784 return get_mdp_major();
785}
786
787static inline int dev2minor(int d)
788{
789 if (d >= 0)
790 return d;
791 return (-1-d) << MdpMinorShift;
792}
793
b5e64645
NB
794#define LEVEL_MULTIPATH (-4)
795#define LEVEL_LINEAR (-1)
796#define LEVEL_FAULTY (-5)
797
17f25ca6
NB
798/* kernel module doesn't know about these */
799#define LEVEL_CONTAINER (-100)
a322f70c 800#define LEVEL_UNSUPPORTED (-200)
17f25ca6 801
b5e64645
NB
802
803/* faulty stuff */
804
805#define WriteTransient 0
806#define ReadTransient 1
807#define WritePersistent 2
808#define ReadPersistent 3
809#define WriteAll 4 /* doesn't go to device */
810#define ReadFixable 5
811#define Modes 6
812
813#define ClearErrors 31
814#define ClearFaults 30
815
816#define AllPersist 100 /* internal use only */
817#define NoPersist 101
818
819#define ModeMask 0x1f
820#define ModeShift 5
fe6729fa
NB
821
822
823#ifdef __TINYC__
824#undef minor
825#undef major
826#undef makedev
827#define minor(x) ((x)&0xff)
828#define major(x) (((x)>>8)&0xff)
829#define makedev(M,m) (((M)<<8) | (m))
830#endif
831
e86c9dd6
NB
832/* for raid5 */
833#define ALGORITHM_LEFT_ASYMMETRIC 0
834#define ALGORITHM_RIGHT_ASYMMETRIC 1
835#define ALGORITHM_LEFT_SYMMETRIC 2
836#define ALGORITHM_RIGHT_SYMMETRIC 3