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Use uuid as /dev name when assembling array of uncertain origin.
[thirdparty/mdadm.git] / mdadm.h
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1/*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
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
30#define _GNU_SOURCE
31#define _FILE_OFFSET_BITS 64
32#include <unistd.h>
33#if !defined(__dietlibc__) && !defined(__KLIBC__)
34extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
35#else
36# if defined(__NO_STAT64) || __WORDSIZE != 32
37# define lseek64 lseek
38# endif
39#endif
40
41#include <sys/types.h>
42#include <sys/stat.h>
43#include <stdlib.h>
44#include <time.h>
45#include <sys/time.h>
46#include <getopt.h>
47#include <fcntl.h>
48#include <stdio.h>
49#include <errno.h>
50#include <string.h>
51#include <syslog.h>
52#ifdef __dietlibc__
53#include <strings.h>
54/* dietlibc has deprecated random and srandom!! */
55#define random rand
56#define srandom srand
57#endif
58
59
60#include <linux/kdev_t.h>
61/*#include <linux/fs.h> */
62#include <sys/mount.h>
63#include <asm/types.h>
64#include <sys/ioctl.h>
65#define MD_MAJOR 9
66#define MdpMinorShift 6
67
68#ifndef BLKGETSIZE64
69#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
70#endif
71
72#define DEFAULT_BITMAP_CHUNK 4096
73#define DEFAULT_BITMAP_DELAY 5
74#define DEFAULT_MAX_WRITE_BEHIND 256
75
76#include "md_u.h"
77#include "md_p.h"
78#include "bitmap.h"
79#include "msg.h"
80
81#include <endian.h>
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... */
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
102#if !defined(__KLIBC__)
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)
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)
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)
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)
131#else
132# error "unknown endianness."
133#endif
134#endif /* __KLIBC__ */
135
136
137
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;
143 int uuid[4];
144 char name[33];
145 unsigned long long data_offset;
146 unsigned long long component_size; /* same as array.size, except in
147 * sectors and up to 64bits.
148 */
149 int reshape_active;
150 unsigned long long reshape_progress;
151 unsigned long long resync_start;
152 unsigned long safe_mode_delay; /* ms delay to mark clean */
153 int new_level, delta_disks, new_layout, new_chunk;
154 int errors;
155 int cache_size; /* size of raid456 stripe cache*/
156 int mismatch_cnt;
157 char text_version[50];
158
159 int container_member; /* for assembling external-metatdata arrays
160 * This is to be used internally by metadata
161 * handler only */
162
163 char sys_name[20];
164 struct mdinfo *devs;
165 struct mdinfo *next;
166
167 /* Device info for mdmon: */
168 int state_fd;
169 #define DS_FAULTY 1
170 #define DS_INSYNC 2
171 #define DS_WRITE_MOSTLY 4
172 #define DS_SPARE 8
173 #define DS_BLOCKED 16
174 #define DS_REMOVE 1024
175 #define DS_UNBLOCK 2048
176 int prev_state, curr_state, next_state;
177
178};
179
180struct createinfo {
181 int uid;
182 int gid;
183 int autof;
184 int mode;
185 int symlinks;
186 struct supertype *supertype;
187};
188
189#define Name "mdadm"
190
191enum mode {
192 ASSEMBLE=1,
193 BUILD,
194 CREATE,
195 MANAGE,
196 MISC,
197 MONITOR,
198 GROW,
199 INCREMENTAL,
200 AUTODETECT,
201};
202
203extern char short_options[];
204extern char short_bitmap_options[];
205extern char short_bitmap_auto_options[];
206extern struct option long_options[];
207extern char Version[], Usage[], Help[], OptionHelp[],
208 Help_create[], Help_build[], Help_assemble[], Help_grow[],
209 Help_incr[],
210 Help_manage[], Help_misc[], Help_monitor[], Help_config[];
211
212/* for option that don't have short equivilents, we assign arbitrary
213 * small numbers. '1' means an undecorated option, so we start at '2'.
214 */
215enum special_options {
216 AssumeClean = 2,
217 BitmapChunk,
218 WriteBehind,
219 ReAdd,
220 NoDegraded,
221 Sparc22,
222 BackupFile,
223 HomeHost,
224 AutoHomeHost,
225 Symlinks,
226 AutoDetect,
227 Waitclean,
228};
229
230/* structures read from config file */
231/* List of mddevice names and identifiers
232 * Identifiers can be:
233 * uuid=128-hex-uuid
234 * super-minor=decimal-minor-number-from-superblock
235 * devices=comma,separated,list,of,device,names,with,wildcards
236 *
237 * If multiple fields are present, the intersection of all matching
238 * devices is considered
239 */
240#define UnSet (0xfffe)
241typedef struct mddev_ident_s {
242 char *devname;
243
244 int uuid_set;
245 int uuid[4];
246 char name[33];
247
248 unsigned int super_minor;
249
250 char *devices; /* comma separated list of device
251 * names with wild cards
252 */
253 int level;
254 unsigned int raid_disks;
255 unsigned int spare_disks;
256 struct supertype *st;
257 int autof; /* 1 for normal, 2 for partitioned */
258 char *spare_group;
259 char *bitmap_file;
260 int bitmap_fd;
261
262 struct mddev_ident_s *next;
263} *mddev_ident_t;
264
265/* List of device names - wildcards expanded */
266typedef struct mddev_dev_s {
267 char *devname;
268 char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
269 * Not set for names read from .config
270 */
271 char writemostly;
272 char re_add;
273 char used; /* set when used */
274 struct mddev_dev_s *next;
275} *mddev_dev_t;
276
277typedef struct mapping {
278 char *name;
279 int num;
280} mapping_t;
281
282
283struct mdstat_ent {
284 char *dev;
285 int devnum;
286 int active;
287 char *level;
288 char *pattern; /* U or up, _ for down */
289 int percent; /* -1 if no resync */
290 int resync; /* 1 if resync, 0 if recovery */
291 int devcnt;
292 int raid_disks;
293 int chunk_size;
294 char * metadata_version;
295 struct mdstat_ent *next;
296};
297
298extern struct mdstat_ent *mdstat_read(int hold, int start);
299extern void free_mdstat(struct mdstat_ent *ms);
300extern void mdstat_wait(int seconds);
301extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
302extern int mddev_busy(int devnum);
303
304struct map_ent {
305 struct map_ent *next;
306 int devnum;
307 char metadata[20];
308 int uuid[4];
309 char *path;
310};
311extern int map_update(struct map_ent **mpp, int devnum, char *metadata,
312 int uuid[4], char *path);
313extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
314extern void map_read(struct map_ent **melp);
315extern int map_write(struct map_ent *mel);
316extern void map_delete(struct map_ent **mapp, int devnum);
317extern void map_free(struct map_ent *map);
318extern void map_add(struct map_ent **melp,
319 int devnum, char *metadata, int uuid[4], char *path);
320
321/* various details can be requested */
322#define GET_LEVEL 1
323#define GET_LAYOUT 2
324#define GET_COMPONENT 4
325#define GET_CHUNK 8
326#define GET_CACHE 16
327#define GET_MISMATCH 32
328#define GET_VERSION 64
329#define GET_DISKS 128
330#define GET_DEGRADED 256
331#define GET_SAFEMODE 512
332
333#define GET_DEVS 1024 /* gets role, major, minor */
334#define GET_OFFSET 2048
335#define GET_SIZE 4096
336#define GET_STATE 8192
337#define GET_ERROR 16384
338
339/* If fd >= 0, get the array it is open on,
340 * else use devnum. >=0 -> major9. <0.....
341 */
342extern int sysfs_open(int devnum, char *devname, char *attr);
343extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum);
344extern void sysfs_free(struct mdinfo *sra);
345extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
346extern int sysfs_attr_match(const char *attr, const char *str);
347extern int sysfs_match_word(const char *word, char **list);
348extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
349 char *name, char *val);
350extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
351 char *name, unsigned long long val);
352extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
353 char *name, unsigned long long *val);
354extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms);
355extern int sysfs_set_array(struct mdinfo *info, int vers);
356extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd);
357extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
358extern int sysfs_unique_holder(int devnum, long rdev);
359extern int load_sys(char *path, char *buf);
360
361
362extern int save_stripes(int *source, unsigned long long *offsets,
363 int raid_disks, int chunk_size, int level, int layout,
364 int nwrites, int *dest,
365 unsigned long long start, unsigned long long length);
366extern int restore_stripes(int *dest, unsigned long long *offsets,
367 int raid_disks, int chunk_size, int level, int layout,
368 int source, unsigned long long read_offset,
369 unsigned long long start, unsigned long long length);
370
371#ifndef Sendmail
372#define Sendmail "/usr/lib/sendmail -t"
373#endif
374
375#define SYSLOG_FACILITY LOG_DAEMON
376
377extern char *map_num(mapping_t *map, int num);
378extern int map_name(mapping_t *map, char *name);
379extern mapping_t r5layout[], pers[], modes[], faultylayout[];
380
381extern char *map_dev(int major, int minor, int create);
382
383struct active_array;
384struct metadata_update;
385
386/* A superswitch provides entry point the a metadata handler.
387 *
388 * The super_switch primarily operates on some "metadata" that
389 * is accessed via the 'supertype'.
390 * This metadata has one of three possible sources.
391 * 1/ It is read from a single device. In this case it may not completely
392 * describe the array or arrays as some information might be on other
393 * devices.
394 * 2/ It is read from all devices in a container. In this case all
395 * information is present.
396 * 3/ It is created by ->init_super / ->add_to_super. In this case it will
397 * be complete once enough ->add_to_super calls have completed.
398 *
399 * When creating an array inside a container, the metadata will be
400 * formed by a combination of 2 and 3. The metadata or the array is read,
401 * then new information is added.
402 *
403 * The metadata must sometimes have a concept of a 'current' array
404 * and a 'current' device.
405 * The 'current' array is set by init_super to be the newly created array,
406 * or is set by super_by_fd when it finds it is looking at an array inside
407 * a container.
408 *
409 * The 'current' device is either the device that the metadata was read from
410 * in case 1, or the last device added by add_to_super in case 3.
411 * Case 2 does not identify a 'current' device.
412 */
413extern struct superswitch {
414
415 /* Used to report details of metadata read from a component
416 * device. ->load_super has been called.
417 */
418 void (*examine_super)(struct supertype *st, char *homehost);
419 void (*brief_examine_super)(struct supertype *st);
420 void (*export_examine_super)(struct supertype *st);
421
422 /* Used to report details of an active array.
423 * ->load_super was possibly given a 'component' string.
424 */
425 void (*detail_super)(struct supertype *st, char *homehost);
426 void (*brief_detail_super)(struct supertype *st);
427 void (*export_detail_super)(struct supertype *st);
428
429 /* Used:
430 * to get uuid to storing in bitmap metadata
431 * and 'reshape' backup-data metadata
432 * To see if a device is being re-added to an array it was part of.
433 */
434 void (*uuid_from_super)(struct supertype *st, int uuid[4]);
435
436 /* Extra generic details from metadata. This could be details about
437 * the container, or about an individual array within the container.
438 * The determination is made either by:
439 * load_super being given a 'component' string.
440 * validate_geometry determining what to create.
441 * The info includes both array information and device information.
442 * The particular device should be:
443 * The last device added by add_to_super
444 * The device the metadata was loaded from by load_super
445 */
446 void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
447
448 /* Check if the given metadata is flagged as belonging to "this"
449 * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost"
450 */
451 int (*match_home)(struct supertype *st, char *homehost);
452
453 /* Make one of several generic modifications to metadata
454 * prior to assembly (or other times).
455 * sparc2.2 - first bug in early 0.90 metadata
456 * super-minor - change name of 0.90 metadata
457 * summaries - 'correct' any redundant data
458 * resync - mark array as dirty to trigger a resync.
459 * uuid - set new uuid - only 0.90 or 1.x
460 * name - change the name of the array (where supported)
461 * homehost - change which host this array is tied to.
462 * devicesize - If metadata is at start of device, change recorded
463 * device size to match actual device size
464 * byteorder - swap bytes for 0.90 metadata
465 *
466 * force-one - mark that device as uptodate, not old or failed.
467 * force-array - mark array as clean if it would not otherwise
468 * assemble
469 * assemble - not sure how this is different from force-one...
470 * linear-grow-new - add a new device to a linear array, but don't
471 * change the size: so superblock still matches
472 * linear-grow-update - now change the size of the array.
473 */
474 int (*update_super)(struct supertype *st, struct mdinfo *info,
475 char *update,
476 char *devname, int verbose,
477 int uuid_set, char *homehost);
478
479 /* Create new metadata for new array as described. This could
480 * be a new container, or an array in a pre-existing container.
481 * Also used to zero metadata prior to writing it to invalidate old
482 * metadata.
483 */
484 int (*init_super)(struct supertype *st, mdu_array_info_t *info,
485 unsigned long long size, char *name,
486 char *homehost, int *uuid);
487
488 /* update the metadata to include new device, either at create or
489 * when hot-adding a spare.
490 */
491 void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo,
492 int fd, char *devname);
493
494 /* Write metadata to one device when fixing problems or adding
495 * a new device.
496 */
497 int (*store_super)(struct supertype *st, int fd);
498
499 /* Write all metadata for this array.
500 */
501 int (*write_init_super)(struct supertype *st);
502 int (*compare_super)(struct supertype *st, struct supertype *tst);
503 int (*load_super)(struct supertype *st, int fd, char *devname);
504 struct supertype * (*match_metadata_desc)(char *arg);
505 __u64 (*avail_size)(struct supertype *st, __u64 size);
506 int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
507 int delay, int write_behind,
508 unsigned long long size, int may_change, int major);
509 void (*locate_bitmap)(struct supertype *st, int fd);
510 int (*write_bitmap)(struct supertype *st, int fd);
511 void (*free_super)(struct supertype *st);
512
513 /* validate_geometry is called with an st returned by
514 * match_metadata_desc.
515 * It should check that the geometry described in compatible with
516 * the metadata type. It will be called repeatedly as devices
517 * added to validate changing size and new devices. If there are
518 * inter-device dependencies, it should record sufficient details
519 * so these can be validated.
520 */
521 int (*validate_geometry)(struct supertype *st, int level, int layout,
522 int raiddisks,
523 int chunk, unsigned long long size,
524 char *subdev, unsigned long long *freesize,
525 int verbose);
526
527 struct mdinfo *(*container_content)(struct supertype *st);
528
529/* for mdmon */
530 int (*open_new)(struct supertype *c, struct active_array *a,
531 char *inst);
532
533 /* Tell the metadata handler the current state of the array.
534 * This covers whether it is known to be consistent (no pending writes)
535 * and how far along a resync is known to have progressed
536 * (in a->resync_start).
537 * resync status is really irrelevant if the array is not consistent,
538 * but some metadata (DDF!) have a place to record the distinction.
539 * If 'consistent' is '2', then the array can mark it dirty if a
540 * resync/recovery/whatever is required, or leave it clean if not.
541 * Return value is 0 dirty (not consistent) and 1 if clean.
542 * it is only really important if consistent is passed in as '2'.
543 */
544 int (*set_array_state)(struct active_array *a, int consistent);
545
546 /* When the state of a device might have changed, we call set_disk to
547 * tell the metadata what the current state is.
548 * Typically this happens on spare->in_sync and (spare|in_sync)->faulty
549 * transitions.
550 * set_disk might be called when the state of the particular disk has
551 * not in fact changed.
552 */
553 void (*set_disk)(struct active_array *a, int n, int state);
554 void (*sync_metadata)(struct supertype *st);
555 void (*process_update)(struct supertype *st,
556 struct metadata_update *update);
557 void (*prepare_update)(struct supertype *st,
558 struct metadata_update *update);
559
560 /* activate_spare will check if the array is degraded and, if it
561 * is, try to find some spare space in the container.
562 * On success, it add appropriate updates (For process_update) to
563 * to the 'updates' list and returns a list of 'mdinfo' identifying
564 * the device, or devices as there might be multiple missing
565 * devices and multiple spares available.
566 */
567 struct mdinfo *(*activate_spare)(struct active_array *a,
568 struct metadata_update **updates);
569
570 int swapuuid; /* true if uuid is bigending rather than hostendian */
571 int external;
572} super0, super1, super_ddf, *superlist[];
573
574extern struct superswitch super_imsm;
575
576struct metadata_update {
577 int len;
578 char *buf;
579 void *space; /* allocated space that monitor will use */
580 struct metadata_update *next;
581};
582
583/* A supertype holds a particular collection of metadata.
584 * It identifies the metadata type by the superswitch, and the particular
585 * sub-version of that metadata type.
586 * metadata read in or created is stored in 'sb' and 'info'.
587 * There are also fields used by mdmon to track containers.
588 *
589 * A supertype may refer to:
590 * Just an array, possibly in a container
591 * A container, not identifying any particular array
592 * Info read from just one device, not yet fully describing the array/container.
593 *
594 *
595 * A supertype is created by:
596 * super_by_fd
597 * guess_super
598 * dup_super
599 */
600struct supertype {
601 struct superswitch *ss;
602 int minor_version;
603 int max_devs;
604 int container_dev; /* devnum of container */
605 char subarray[32]; /* name of array inside container */
606 void *sb;
607 void *info;
608 int loaded_container; /* Set if load_super found a container,
609 * not just one device */
610
611 struct metadata_update *updates;
612 struct metadata_update **update_tail;
613
614 /* extra stuff used by mdmon */
615 struct active_array *arrays;
616 int sock; /* listen to external programs */
617 int devnum;
618 char *devname; /* e.g. md0. This appears in metadata_verison:
619 * external:/md0/12
620 */
621 int devcnt;
622 char *device_name; /* e.g. /dev/md/whatever */
623
624 struct mdinfo *devs;
625
626};
627
628extern struct supertype *super_by_fd(int fd);
629extern struct supertype *guess_super(int fd);
630extern struct supertype *dup_super(struct supertype *st);
631extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
632extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
633 mdu_disk_info_t *disk);
634
635#if __GNUC__ < 3
636struct stat64;
637#endif
638
639#define HAVE_NFTW we assume
640#define HAVE_FTW
641
642#ifdef UCLIBC
643# include <features.h>
644# ifndef __UCLIBC_HAS_FTW__
645# undef HAVE_FTW
646# undef HAVE_NFTW
647# endif
648#endif
649
650#ifdef __dietlibc__
651# undef HAVE_NFTW
652#endif
653
654#if defined(__KLIBC__)
655# undef HAVE_NFTW
656# undef HAVE_FTW
657#endif
658
659#ifndef HAVE_NFTW
660# define FTW_PHYS 1
661# ifndef HAVE_FTW
662 struct FTW {};
663# endif
664#endif
665
666#ifdef HAVE_FTW
667# include <ftw.h>
668#endif
669
670extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
671
672
673extern int Manage_ro(char *devname, int fd, int readonly);
674extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
675extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
676extern int Manage_reconfig(char *devname, int fd, int layout);
677extern int Manage_subdevs(char *devname, int fd,
678 mddev_dev_t devlist, int verbose);
679extern int autodetect(void);
680extern int Grow_Add_device(char *devname, int fd, char *newdev);
681extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
682extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
683 long long size,
684 int level, int layout, int chunksize, int raid_disks);
685extern int Grow_restart(struct supertype *st, struct mdinfo *info,
686 int *fdlist, int cnt, char *backup_file);
687
688
689extern int Assemble(struct supertype *st, char *mddev, int mdfd,
690 mddev_ident_t ident,
691 mddev_dev_t devlist, char *backup_file,
692 int readonly, int runstop,
693 char *update, char *homehost,
694 int verbose, int force);
695
696extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
697 int raiddisks,
698 mddev_dev_t devlist, int assume_clean,
699 char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
700
701
702extern int Create(struct supertype *st, char *mddev, int mdfd,
703 int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
704 char *name, char *homehost, int *uuid,
705 int subdevs, mddev_dev_t devlist,
706 int runstop, int verbose, int force, int assume_clean,
707 char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
708
709extern int Detail(char *dev, int brief, int export, int test, char *homehost);
710extern int Query(char *dev);
711extern int Examine(mddev_dev_t devlist, int brief, int export, int scan,
712 int SparcAdjust, struct supertype *forcest, char *homehost);
713extern int Monitor(mddev_dev_t devlist,
714 char *mailaddr, char *alert_cmd,
715 int period, int daemonise, int scan, int oneshot,
716 int dosyslog, int test, char *pidfile);
717
718extern int Kill(char *dev, int force, int quiet, int noexcl);
719extern int Wait(char *dev);
720extern int WaitClean(char *dev);
721
722extern int Incremental(char *devname, int verbose, int runstop,
723 struct supertype *st, char *homehost, int autof);
724extern int Incremental_container(struct supertype *st, char *devname,
725 int verbose, int runstop, int autof);
726extern void RebuildMap(void);
727extern int IncrementalScan(int verbose);
728
729extern int CreateBitmap(char *filename, int force, char uuid[16],
730 unsigned long chunksize, unsigned long daemon_sleep,
731 unsigned long write_behind,
732 unsigned long long array_size,
733 int major);
734extern int ExamineBitmap(char *filename, int brief, struct supertype *st);
735extern int bitmap_update_uuid(int fd, int *uuid, int swap);
736
737extern int md_get_version(int fd);
738extern int get_linux_version(void);
739extern int parse_uuid(char *str, int uuid[4]);
740extern int check_ext2(int fd, char *name);
741extern int check_reiser(int fd, char *name);
742extern int check_raid(int fd, char *name);
743
744extern int get_mdp_major(void);
745extern int dev_open(char *dev, int flags);
746extern int open_dev_excl(int devnum);
747extern int is_standard(char *dev, int *nump);
748
749extern int parse_auto(char *str, char *msg, int config);
750extern mddev_ident_t conf_get_ident(char *dev);
751extern mddev_dev_t conf_get_devs(void);
752extern int conf_test_dev(char *devname);
753extern struct createinfo *conf_get_create_info(void);
754extern void set_conffile(char *file);
755extern char *conf_get_mailaddr(void);
756extern char *conf_get_mailfrom(void);
757extern char *conf_get_program(void);
758extern char *conf_get_homehost(void);
759extern char *conf_line(FILE *file);
760extern char *conf_word(FILE *file, int allow_key);
761extern void free_line(char *line);
762extern int match_oneof(char *devices, char *devname);
763extern void uuid_from_super(int uuid[4], mdp_super_t *super);
764extern int same_uuid(int a[4], int b[4], int swapuuid);
765extern void copy_uuid(void *a, int b[4], int swapuuid);
766extern char *fname_from_uuid(struct supertype *st,
767 struct mdinfo *info, char *buf);
768extern unsigned long calc_csum(void *super, int bytes);
769extern int enough(int level, int raid_disks, int layout, int clean,
770 char *avail, int avail_disks);
771extern int ask(char *mesg);
772extern unsigned long long get_component_size(int fd);
773extern void remove_partitions(int fd);
774extern unsigned long long calc_array_size(int level, int raid_disks, int layout,
775 int chunksize, unsigned long long devsize);
776extern int flush_metadata_updates(struct supertype *st);
777extern void append_metadata_update(struct supertype *st, void *buf, int len);
778
779extern int add_disk(int mdfd, struct supertype *st,
780 struct mdinfo *sra, struct mdinfo *info);
781extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info);
782
783extern char *human_size(long long bytes);
784char *human_size_brief(long long bytes);
785
786#define NoMdDev (1<<23)
787extern int find_free_devnum(int use_partitions);
788
789extern void put_md_name(char *name);
790extern char *get_md_name(int dev);
791
792extern char DefaultConfFile[];
793
794extern int open_mddev(char *dev, int autof);
795extern int open_mddev_devnum(char *devname, int devnum, char *name,
796 char *chosen_name, int parts);
797extern int open_container(int fd);
798
799extern int mdmon_running(int devnum);
800extern int signal_mdmon(int devnum);
801extern int env_no_mdmon(void);
802extern int start_mdmon(int devnum);
803
804extern char *devnum2devname(int num);
805extern int devname2devnum(char *name);
806extern int stat2devnum(struct stat *st);
807extern int fd2devnum(int fd);
808
809static inline int dev2major(int d)
810{
811 if (d >= 0)
812 return MD_MAJOR;
813 else
814 return get_mdp_major();
815}
816
817static inline int dev2minor(int d)
818{
819 if (d >= 0)
820 return d;
821 return (-1-d) << MdpMinorShift;
822}
823
824static inline int ROUND_UP(int a, int base)
825{
826 return ((a+base-1)/base)*base;
827}
828
829static inline int is_subarray(char *vers)
830{
831 /* The version string for a 'subarray' (an array in a container)
832 * is
833 * /containername/componentname for normal read-write arrays
834 * -containername/componentname for read-only arrays.
835 * containername is e.g. md0, md_d1
836 * componentname is dependant on the metadata. e.g. '1' 'S1' ...
837 */
838 return (*vers == '/' || *vers == '-');
839}
840
841#define LEVEL_MULTIPATH (-4)
842#define LEVEL_LINEAR (-1)
843#define LEVEL_FAULTY (-5)
844
845/* kernel module doesn't know about these */
846#define LEVEL_CONTAINER (-100)
847#define LEVEL_UNSUPPORTED (-200)
848
849
850/* faulty stuff */
851
852#define WriteTransient 0
853#define ReadTransient 1
854#define WritePersistent 2
855#define ReadPersistent 3
856#define WriteAll 4 /* doesn't go to device */
857#define ReadFixable 5
858#define Modes 6
859
860#define ClearErrors 31
861#define ClearFaults 30
862
863#define AllPersist 100 /* internal use only */
864#define NoPersist 101
865
866#define ModeMask 0x1f
867#define ModeShift 5
868
869
870#ifdef __TINYC__
871#undef minor
872#undef major
873#undef makedev
874#define minor(x) ((x)&0xff)
875#define major(x) (((x)>>8)&0xff)
876#define makedev(M,m) (((M)<<8) | (m))
877#endif
878
879/* for raid5 */
880#define ALGORITHM_LEFT_ASYMMETRIC 0
881#define ALGORITHM_RIGHT_ASYMMETRIC 1
882#define ALGORITHM_LEFT_SYMMETRIC 2
883#define ALGORITHM_RIGHT_SYMMETRIC 3
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