Factor common code into new "start_mdmon".
[thirdparty/mdadm.git] / mdadm.h
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__)
34 extern __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 */
139 struct 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 int new_level, delta_disks, new_layout, new_chunk;
153 int errors;
154 int cache_size; /* size of raid456 stripe cache*/
155 int mismatch_cnt;
156 char text_version[50];
157
158 int container_member; /* for assembling external-metatdata arrays
159 * This is to be used internally by metadata
160 * handler only */
161
162 char sys_name[20];
163 struct mdinfo *devs;
164 struct mdinfo *next;
165
166 /* Device info for mdmon: */
167 int state_fd;
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
174 int prev_state, curr_state, next_state;
175
176 };
177
178 struct createinfo {
179 int uid;
180 int gid;
181 int autof;
182 int mode;
183 int symlinks;
184 struct supertype *supertype;
185 };
186
187 #define Name "mdadm"
188
189 enum mode {
190 ASSEMBLE=1,
191 BUILD,
192 CREATE,
193 MANAGE,
194 MISC,
195 MONITOR,
196 GROW,
197 INCREMENTAL,
198 AUTODETECT,
199 };
200
201 extern char short_options[];
202 extern char short_bitmap_options[];
203 extern char short_bitmap_auto_options[];
204 extern struct option long_options[];
205 extern char Version[], Usage[], Help[], OptionHelp[],
206 Help_create[], Help_build[], Help_assemble[], Help_grow[],
207 Help_incr[],
208 Help_manage[], Help_misc[], Help_monitor[], Help_config[];
209
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 */
213 enum special_options {
214 AssumeClean = 2,
215 BitmapChunk,
216 WriteBehind,
217 ReAdd,
218 NoDegraded,
219 Sparc22,
220 BackupFile,
221 HomeHost,
222 AutoHomeHost,
223 Symlinks,
224 AutoDetect,
225 };
226
227 /* structures read from config file */
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 */
237 #define UnSet (0xfffe)
238 typedef struct mddev_ident_s {
239 char *devname;
240
241 int uuid_set;
242 int uuid[4];
243 char name[33];
244
245 unsigned int super_minor;
246
247 char *devices; /* comma separated list of device
248 * names with wild cards
249 */
250 int level;
251 unsigned int raid_disks;
252 unsigned int spare_disks;
253 struct supertype *st;
254 int autof; /* 1 for normal, 2 for partitioned */
255 char *spare_group;
256 char *bitmap_file;
257 int bitmap_fd;
258
259 struct mddev_ident_s *next;
260 } *mddev_ident_t;
261
262 /* List of device names - wildcards expanded */
263 typedef struct mddev_dev_s {
264 char *devname;
265 char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
266 * Not set for names read from .config
267 */
268 char writemostly;
269 char re_add;
270 char used; /* set when used */
271 struct mddev_dev_s *next;
272 } *mddev_dev_t;
273
274 typedef struct mapping {
275 char *name;
276 int num;
277 } mapping_t;
278
279
280 struct 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 */
287 int resync; /* 1 if resync, 0 if recovery */
288 int devcnt;
289 int raid_disks;
290 int chunk_size;
291 char * metadata_version;
292 struct mdstat_ent *next;
293 };
294
295 extern struct mdstat_ent *mdstat_read(int hold, int start);
296 extern void free_mdstat(struct mdstat_ent *ms);
297 extern void mdstat_wait(int seconds);
298 extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
299 extern int mddev_busy(int devnum);
300
301 struct map_ent {
302 struct map_ent *next;
303 int devnum;
304 char metadata[20];
305 int uuid[4];
306 char *path;
307 };
308 extern int map_update(struct map_ent **mpp, int devnum, char *metadata,
309 int uuid[4], char *path);
310 extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
311 extern void map_read(struct map_ent **melp);
312 extern int map_write(struct map_ent *mel);
313 extern void map_delete(struct map_ent **mapp, int devnum);
314 extern void map_free(struct map_ent *map);
315 extern void map_add(struct map_ent **melp,
316 int devnum, char *metadata, int uuid[4], char *path);
317
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
323 #define GET_CACHE 16
324 #define GET_MISMATCH 32
325 #define GET_VERSION 64
326 #define GET_DISKS 128
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 */
337 extern int sysfs_open(int devnum, char *devname, char *attr);
338 extern void sysfs_free(struct mdinfo *sra);
339 extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
340 extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
341 char *name, char *val);
342 extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
343 char *name, unsigned long long val);
344 extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
345 char *name, unsigned long long *val);
346 extern int sysfs_set_array(struct mdinfo *sra,
347 struct mdinfo *info);
348 extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd);
349 extern int sysfs_disk_to_sg(int fd);
350 extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
351 extern int sysfs_unique_holder(int devnum, long rdev);
352
353
354 extern 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);
358 extern 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);
362
363 #ifndef Sendmail
364 #define Sendmail "/usr/lib/sendmail -t"
365 #endif
366
367 #define SYSLOG_FACILITY LOG_DAEMON
368
369 extern char *map_num(mapping_t *map, int num);
370 extern int map_name(mapping_t *map, char *name);
371 extern mapping_t r5layout[], pers[], modes[], faultylayout[];
372
373 extern char *map_dev(int major, int minor, int create);
374
375 struct active_array;
376 struct metadata_update;
377
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 */
405 extern struct superswitch {
406
407 /* Used to report details of metadata read from a component
408 * device. ->load_super has been called.
409 */
410 void (*examine_super)(struct supertype *st, char *homehost);
411 void (*brief_examine_super)(struct supertype *st);
412 void (*export_examine_super)(struct supertype *st);
413
414 /* Used to report details of an active array.
415 * ->load_super was possibly given a 'component' string.
416 */
417 void (*detail_super)(struct supertype *st, char *homehost);
418 void (*brief_detail_super)(struct supertype *st);
419 void (*export_detail_super)(struct supertype *st);
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 */
426 void (*uuid_from_super)(struct supertype *st, int uuid[4]);
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.
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
437 */
438 void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
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 */
444 int (*match_home)(struct supertype *st, char *homehost);
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 */
467 int (*update_super)(struct supertype *st, struct mdinfo *info,
468 char *update,
469 char *devname, int verbose,
470 int uuid_set, char *homehost);
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 */
477 int (*init_super)(struct supertype *st, mdu_array_info_t *info,
478 unsigned long long size, char *name,
479 char *homehost, int *uuid);
480
481 /* update the metadata to include new device, either at create or
482 * when hot-adding a spare.
483 */
484 void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo,
485 int fd, char *devname);
486
487 /* Write metadata to one device when fixing problems or adding
488 * a new device.
489 */
490 int (*store_super)(struct supertype *st, int fd);
491
492 /* Write all metadata for this array.
493 */
494 int (*write_init_super)(struct supertype *st);
495 int (*compare_super)(struct supertype *st, struct supertype *tst);
496 int (*load_super)(struct supertype *st, int fd, char *devname);
497 struct supertype * (*match_metadata_desc)(char *arg);
498 __u64 (*avail_size)(struct supertype *st, __u64 size);
499 int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
500 int delay, int write_behind,
501 unsigned long long size, int may_change, int major);
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);
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 */
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,
518 int verbose);
519
520 struct mdinfo *(*container_content)(struct supertype *st);
521
522 /* for mdmon */
523 int (*open_new)(struct supertype *c, struct active_array *a,
524 char *inst);
525
526 /* Tell the metadata handler the current state of the array.
527 * This covers whether it is known to be consistent (no pending writes)
528 * when how far along a resync is known to have progressed
529 * (in a->resync_start).
530 * resync status is really irrelevant if the array is not consistent,
531 * but some metadata (DDF!) have a place to record the distinction.
532 */
533 void (*set_array_state)(struct active_array *a, int consistent);
534
535 /* When the state of a device might have changed, we call set_disk to
536 * tell the metadata what the current state is.
537 * Typically this happens on spare->in_sync and (spare|in_sync)->faulty
538 * transitions.
539 * set_disk might be called when the state of the particular disk has
540 * not in fact changed.
541 */
542 void (*set_disk)(struct active_array *a, int n, int state);
543 void (*sync_metadata)(struct supertype *st);
544 void (*process_update)(struct supertype *st,
545 struct metadata_update *update);
546 void (*prepare_update)(struct supertype *st,
547 struct metadata_update *update);
548
549 /* activate_spare will check if the array is degraded and, if it
550 * is, try to find some spare space in the container.
551 * On success, it add appropriate updates (For process_update) to
552 * to the 'updates' list and returns a list of 'mdinfo' identifying
553 * the device, or devices as there might be multiple missing
554 * devices and multiple spares available.
555 */
556 struct mdinfo *(*activate_spare)(struct active_array *a,
557 struct metadata_update **updates);
558
559 int swapuuid; /* true if uuid is bigending rather than hostendian */
560 int external;
561 } super0, super1, super_ddf, *superlist[];
562
563 extern struct superswitch super_imsm;
564
565 struct metadata_update {
566 int len;
567 char *buf;
568 void *space; /* allocated space that monitor will use */
569 struct metadata_update *next;
570 };
571
572 /* A supertype holds a particular collection of metadata.
573 * It identifies the metadata type by the superswitch, and the particular
574 * sub-version of that metadata type.
575 * metadata read in or created is stored in 'sb' and 'info'.
576 * There are also fields used by mdmon to track containers.
577 *
578 * A supertype is created by:
579 * super_by_fd
580 * guess_super
581 * dup_super
582 */
583 struct supertype {
584 struct superswitch *ss;
585 int minor_version;
586 int max_devs;
587 int container_dev; /* devnum of container */
588 char subarray[32]; /* name of array inside container */
589 void *sb;
590 void *info;
591
592 struct metadata_update *updates;
593 struct metadata_update **update_tail;
594
595 /* extra stuff used by mdmon */
596 struct active_array *arrays;
597 int sock; /* listen to external programs */
598 int devnum;
599 char *devname; /* e.g. md0. This appears in metadata_verison:
600 * external:/md0/12
601 */
602 int devcnt;
603 char *device_name; /* e.g. /dev/md/whatever */
604
605 struct mdinfo *devs;
606
607 };
608
609 extern struct supertype *super_by_fd(int fd);
610 extern struct supertype *guess_super(int fd);
611 extern struct supertype *dup_super(struct supertype *st);
612 extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
613 extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
614 mdu_disk_info_t *disk);
615
616 #if __GNUC__ < 3
617 struct stat64;
618 #endif
619
620 #define HAVE_NFTW we assume
621 #define HAVE_FTW
622
623 #ifdef UCLIBC
624 # include <features.h>
625 # ifndef __UCLIBC_HAS_FTW__
626 # undef HAVE_FTW
627 # undef HAVE_NFTW
628 # endif
629 #endif
630
631 #ifdef __dietlibc__
632 # undef HAVE_NFTW
633 #endif
634
635 #if defined(__KLIBC__)
636 # undef HAVE_NFTW
637 # undef HAVE_FTW
638 #endif
639
640 #ifndef HAVE_NFTW
641 # define FTW_PHYS 1
642 # ifndef HAVE_FTW
643 struct FTW {};
644 # endif
645 #endif
646
647 #ifdef HAVE_FTW
648 # include <ftw.h>
649 #endif
650
651 extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
652
653
654 extern int Manage_ro(char *devname, int fd, int readonly);
655 extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
656 extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
657 extern int Manage_reconfig(char *devname, int fd, int layout);
658 extern int Manage_subdevs(char *devname, int fd,
659 mddev_dev_t devlist, int verbose);
660 extern int autodetect(void);
661 extern int Grow_Add_device(char *devname, int fd, char *newdev);
662 extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
663 extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
664 long long size,
665 int level, int layout, int chunksize, int raid_disks);
666 extern int Grow_restart(struct supertype *st, struct mdinfo *info,
667 int *fdlist, int cnt, char *backup_file);
668
669
670 extern int Assemble(struct supertype *st, char *mddev, int mdfd,
671 mddev_ident_t ident,
672 mddev_dev_t devlist, char *backup_file,
673 int readonly, int runstop,
674 char *update, char *homehost,
675 int verbose, int force);
676
677 extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
678 int raiddisks,
679 mddev_dev_t devlist, int assume_clean,
680 char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
681
682
683 extern int Create(struct supertype *st, char *mddev, int mdfd,
684 int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
685 char *name, char *homehost, int *uuid,
686 int subdevs, mddev_dev_t devlist,
687 int runstop, int verbose, int force, int assume_clean,
688 char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
689
690 extern int Detail(char *dev, int brief, int export, int test, char *homehost);
691 extern int Query(char *dev);
692 extern int Examine(mddev_dev_t devlist, int brief, int export, int scan,
693 int SparcAdjust, struct supertype *forcest, char *homehost);
694 extern int Monitor(mddev_dev_t devlist,
695 char *mailaddr, char *alert_cmd,
696 int period, int daemonise, int scan, int oneshot,
697 int dosyslog, int test, char *pidfile);
698
699 extern int Kill(char *dev, int force, int quiet, int noexcl);
700 extern int Wait(char *dev);
701
702 extern int Incremental(char *devname, int verbose, int runstop,
703 struct supertype *st, char *homehost, int autof);
704 extern int Incremental_container(struct supertype *st, char *devname,
705 int verbose, int runstop, int autof);
706 extern void RebuildMap(void);
707 extern int IncrementalScan(int verbose);
708
709 extern int CreateBitmap(char *filename, int force, char uuid[16],
710 unsigned long chunksize, unsigned long daemon_sleep,
711 unsigned long write_behind,
712 unsigned long long array_size,
713 int major);
714 extern int ExamineBitmap(char *filename, int brief, struct supertype *st);
715 extern int bitmap_update_uuid(int fd, int *uuid, int swap);
716
717 extern int md_get_version(int fd);
718 extern int get_linux_version(void);
719 extern int parse_uuid(char *str, int uuid[4]);
720 extern int check_ext2(int fd, char *name);
721 extern int check_reiser(int fd, char *name);
722 extern int check_raid(int fd, char *name);
723
724 extern int get_mdp_major(void);
725 extern int dev_open(char *dev, int flags);
726 extern int open_dev_excl(int devnum);
727 extern int is_standard(char *dev, int *nump);
728
729 extern int parse_auto(char *str, char *msg, int config);
730 extern mddev_ident_t conf_get_ident(char *dev);
731 extern mddev_dev_t conf_get_devs(void);
732 extern int conf_test_dev(char *devname);
733 extern struct createinfo *conf_get_create_info(void);
734 extern void set_conffile(char *file);
735 extern char *conf_get_mailaddr(void);
736 extern char *conf_get_mailfrom(void);
737 extern char *conf_get_program(void);
738 extern char *conf_get_homehost(void);
739 extern char *conf_line(FILE *file);
740 extern char *conf_word(FILE *file, int allow_key);
741 extern void free_line(char *line);
742 extern int match_oneof(char *devices, char *devname);
743 extern void uuid_from_super(int uuid[4], mdp_super_t *super);
744 extern int same_uuid(int a[4], int b[4], int swapuuid);
745 extern void copy_uuid(void *a, int b[4], int swapuuid);
746 extern unsigned long calc_csum(void *super, int bytes);
747 extern int enough(int level, int raid_disks, int layout, int clean,
748 char *avail, int avail_disks);
749 extern int ask(char *mesg);
750 extern unsigned long long get_component_size(int fd);
751 extern void remove_partitions(int fd);
752 extern unsigned long long calc_array_size(int level, int raid_disks, int layout,
753 int chunksize, unsigned long long devsize);
754 extern int flush_metadata_updates(struct supertype *st);
755 extern void append_metadata_update(struct supertype *st, void *buf, int len);
756
757
758 extern char *human_size(long long bytes);
759 char *human_size_brief(long long bytes);
760
761 #define NoMdDev (1<<23)
762 extern int find_free_devnum(int use_partitions);
763
764 extern void put_md_name(char *name);
765 extern char *get_md_name(int dev);
766
767 extern char DefaultConfFile[];
768
769 extern int open_mddev(char *dev, int autof);
770 extern int open_mddev_devnum(char *devname, int devnum, char *name,
771 char *chosen_name, int parts);
772 extern int open_container(int fd);
773
774 extern int mdmon_running(int devnum);
775 extern int signal_mdmon(int devnum);
776 extern int env_no_mdmon(void);
777 extern int start_mdmon(int devnum);
778
779 extern char *devnum2devname(int num);
780 extern int devname2devnum(char *name);
781 extern int fd2devnum(int fd);
782
783 static inline int dev2major(int d)
784 {
785 if (d >= 0)
786 return MD_MAJOR;
787 else
788 return get_mdp_major();
789 }
790
791 static inline int dev2minor(int d)
792 {
793 if (d >= 0)
794 return d;
795 return (-1-d) << MdpMinorShift;
796 }
797
798 static inline int ROUND_UP(int a, int base)
799 {
800 return ((a+base-1)/base)*base;
801 }
802
803 #define LEVEL_MULTIPATH (-4)
804 #define LEVEL_LINEAR (-1)
805 #define LEVEL_FAULTY (-5)
806
807 /* kernel module doesn't know about these */
808 #define LEVEL_CONTAINER (-100)
809 #define LEVEL_UNSUPPORTED (-200)
810
811
812 /* faulty stuff */
813
814 #define WriteTransient 0
815 #define ReadTransient 1
816 #define WritePersistent 2
817 #define ReadPersistent 3
818 #define WriteAll 4 /* doesn't go to device */
819 #define ReadFixable 5
820 #define Modes 6
821
822 #define ClearErrors 31
823 #define ClearFaults 30
824
825 #define AllPersist 100 /* internal use only */
826 #define NoPersist 101
827
828 #define ModeMask 0x1f
829 #define ModeShift 5
830
831
832 #ifdef __TINYC__
833 #undef minor
834 #undef major
835 #undef makedev
836 #define minor(x) ((x)&0xff)
837 #define major(x) (((x)>>8)&0xff)
838 #define makedev(M,m) (((M)<<8) | (m))
839 #endif
840
841 /* for raid5 */
842 #define ALGORITHM_LEFT_ASYMMETRIC 0
843 #define ALGORITHM_RIGHT_ASYMMETRIC 1
844 #define ALGORITHM_LEFT_SYMMETRIC 2
845 #define ALGORITHM_RIGHT_SYMMETRIC 3