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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 DetailPlatform,
229};
230
231/* structures read from config file */
232/* List of mddevice names and identifiers
233 * Identifiers can be:
234 * uuid=128-hex-uuid
235 * super-minor=decimal-minor-number-from-superblock
236 * devices=comma,separated,list,of,device,names,with,wildcards
237 *
238 * If multiple fields are present, the intersection of all matching
239 * devices is considered
240 */
241#define UnSet (0xfffe)
242typedef struct mddev_ident_s {
243 char *devname;
244
245 int uuid_set;
246 int uuid[4];
247 char name[33];
248
249 unsigned int super_minor;
250
251 char *devices; /* comma separated list of device
252 * names with wild cards
253 */
254 int level;
255 unsigned int raid_disks;
256 unsigned int spare_disks;
257 struct supertype *st;
258 int autof; /* 1 for normal, 2 for partitioned */
259 char *spare_group;
260 char *bitmap_file;
261 int bitmap_fd;
262
263 char *container; /* /dev/whatever name of container, or
264 * uuid of container. You would expect
265 * this to be the 'devname' or UUID
266 * of some other entry.
267 */
268 char *member; /* subarray within a container */
269
270 struct mddev_ident_s *next;
271} *mddev_ident_t;
272
273/* List of device names - wildcards expanded */
274typedef struct mddev_dev_s {
275 char *devname;
276 char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
277 * Not set for names read from .config
278 */
279 char writemostly; /* 1 for 'set writemostly', 2 for 'clear writemostly' */
280 char re_add;
281 char used; /* set when used */
282 struct mdinfo *content; /* If devname is a container, this might list
283 * the remaining member arrays. */
284 struct mddev_dev_s *next;
285} *mddev_dev_t;
286
287typedef struct mapping {
288 char *name;
289 int num;
290} mapping_t;
291
292
293struct mdstat_ent {
294 char *dev;
295 int devnum;
296 int active;
297 char *level;
298 char *pattern; /* U or up, _ for down */
299 int percent; /* -1 if no resync */
300 int resync; /* 1 if resync, 0 if recovery */
301 int devcnt;
302 int raid_disks;
303 int chunk_size;
304 char * metadata_version;
305 struct mdstat_ent *next;
306};
307
308extern struct mdstat_ent *mdstat_read(int hold, int start);
309extern void free_mdstat(struct mdstat_ent *ms);
310extern void mdstat_wait(int seconds);
311extern void mdstat_wait_fd(int fd, const sigset_t *sigmask);
312extern int mddev_busy(int devnum);
313
314struct map_ent {
315 struct map_ent *next;
316 int devnum;
317 char metadata[20];
318 int uuid[4];
319 int bad;
320 char *path;
321};
322extern int map_update(struct map_ent **mpp, int devnum, char *metadata,
323 int uuid[4], char *path);
324extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
325extern struct map_ent *map_by_devnum(struct map_ent **map, int devnum);
326extern struct map_ent *map_by_name(struct map_ent **map, char *name);
327extern void map_read(struct map_ent **melp);
328extern int map_write(struct map_ent *mel);
329extern void map_delete(struct map_ent **mapp, int devnum);
330extern void map_free(struct map_ent *map);
331extern void map_add(struct map_ent **melp,
332 int devnum, char *metadata, int uuid[4], char *path);
333extern int map_lock(struct map_ent **melp);
334extern void map_unlock(struct map_ent **melp);
335
336/* various details can be requested */
337#define GET_LEVEL 1
338#define GET_LAYOUT 2
339#define GET_COMPONENT 4
340#define GET_CHUNK 8
341#define GET_CACHE 16
342#define GET_MISMATCH 32
343#define GET_VERSION 64
344#define GET_DISKS 128
345#define GET_DEGRADED 256
346#define GET_SAFEMODE 512
347
348#define GET_DEVS 1024 /* gets role, major, minor */
349#define GET_OFFSET 2048
350#define GET_SIZE 4096
351#define GET_STATE 8192
352#define GET_ERROR 16384
353
354/* If fd >= 0, get the array it is open on,
355 * else use devnum. >=0 -> major9. <0.....
356 */
357extern int sysfs_open(int devnum, char *devname, char *attr);
358extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum);
359extern void sysfs_free(struct mdinfo *sra);
360extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options);
361extern int sysfs_attr_match(const char *attr, const char *str);
362extern int sysfs_match_word(const char *word, char **list);
363extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev,
364 char *name, char *val);
365extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev,
366 char *name, unsigned long long val);
367extern int sysfs_uevent(struct mdinfo *sra, char *event);
368extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
369 char *name, unsigned long long *val);
370extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms);
371extern int sysfs_set_array(struct mdinfo *info, int vers);
372extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd);
373extern int sysfs_disk_to_scsi_id(int fd, __u32 *id);
374extern int sysfs_unique_holder(int devnum, long rdev);
375extern int load_sys(char *path, char *buf);
376
377
378extern int save_stripes(int *source, unsigned long long *offsets,
379 int raid_disks, int chunk_size, int level, int layout,
380 int nwrites, int *dest,
381 unsigned long long start, unsigned long long length);
382extern int restore_stripes(int *dest, unsigned long long *offsets,
383 int raid_disks, int chunk_size, int level, int layout,
384 int source, unsigned long long read_offset,
385 unsigned long long start, unsigned long long length);
386
387#ifndef Sendmail
388#define Sendmail "/usr/lib/sendmail -t"
389#endif
390
391#define SYSLOG_FACILITY LOG_DAEMON
392
393extern char *map_num(mapping_t *map, int num);
394extern int map_name(mapping_t *map, char *name);
395extern mapping_t r5layout[], pers[], modes[], faultylayout[];
396
397extern char *map_dev(int major, int minor, int create);
398
399struct active_array;
400struct metadata_update;
401
402/* A superswitch provides entry point the a metadata handler.
403 *
404 * The super_switch primarily operates on some "metadata" that
405 * is accessed via the 'supertype'.
406 * This metadata has one of three possible sources.
407 * 1/ It is read from a single device. In this case it may not completely
408 * describe the array or arrays as some information might be on other
409 * devices.
410 * 2/ It is read from all devices in a container. In this case all
411 * information is present.
412 * 3/ It is created by ->init_super / ->add_to_super. In this case it will
413 * be complete once enough ->add_to_super calls have completed.
414 *
415 * When creating an array inside a container, the metadata will be
416 * formed by a combination of 2 and 3. The metadata or the array is read,
417 * then new information is added.
418 *
419 * The metadata must sometimes have a concept of a 'current' array
420 * and a 'current' device.
421 * The 'current' array is set by init_super to be the newly created array,
422 * or is set by super_by_fd when it finds it is looking at an array inside
423 * a container.
424 *
425 * The 'current' device is either the device that the metadata was read from
426 * in case 1, or the last device added by add_to_super in case 3.
427 * Case 2 does not identify a 'current' device.
428 */
429extern struct superswitch {
430
431 /* Used to report details of metadata read from a component
432 * device. ->load_super has been called.
433 */
434 void (*examine_super)(struct supertype *st, char *homehost);
435 void (*brief_examine_super)(struct supertype *st);
436 void (*export_examine_super)(struct supertype *st);
437
438 /* Used to report details of an active array.
439 * ->load_super was possibly given a 'component' string.
440 */
441 void (*detail_super)(struct supertype *st, char *homehost);
442 void (*brief_detail_super)(struct supertype *st);
443 void (*export_detail_super)(struct supertype *st);
444
445 /* Optional: platform hardware / firmware details */
446 int (*detail_platform)(int verbose, int enumerate_only);
447
448 /* Used:
449 * to get uuid to storing in bitmap metadata
450 * and 'reshape' backup-data metadata
451 * To see if a device is being re-added to an array it was part of.
452 */
453 void (*uuid_from_super)(struct supertype *st, int uuid[4]);
454
455 /* Extract generic details from metadata. This could be details about
456 * the container, or about an individual array within the container.
457 * The determination is made either by:
458 * load_super being given a 'component' string.
459 * validate_geometry determining what to create.
460 * The info includes both array information and device information.
461 * The particular device should be:
462 * The last device added by add_to_super
463 * The device the metadata was loaded from by load_super
464 */
465 void (*getinfo_super)(struct supertype *st, struct mdinfo *info);
466
467 /* Check if the given metadata is flagged as belonging to "this"
468 * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost"
469 */
470 int (*match_home)(struct supertype *st, char *homehost);
471
472 /* Make one of several generic modifications to metadata
473 * prior to assembly (or other times).
474 * sparc2.2 - first bug in early 0.90 metadata
475 * super-minor - change name of 0.90 metadata
476 * summaries - 'correct' any redundant data
477 * resync - mark array as dirty to trigger a resync.
478 * uuid - set new uuid - only 0.90 or 1.x
479 * name - change the name of the array (where supported)
480 * homehost - change which host this array is tied to.
481 * devicesize - If metadata is at start of device, change recorded
482 * device size to match actual device size
483 * byteorder - swap bytes for 0.90 metadata
484 *
485 * force-one - mark that device as uptodate, not old or failed.
486 * force-array - mark array as clean if it would not otherwise
487 * assemble
488 * assemble - not sure how this is different from force-one...
489 * linear-grow-new - add a new device to a linear array, but don't
490 * change the size: so superblock still matches
491 * linear-grow-update - now change the size of the array.
492 */
493 int (*update_super)(struct supertype *st, struct mdinfo *info,
494 char *update,
495 char *devname, int verbose,
496 int uuid_set, char *homehost);
497
498 /* Create new metadata for new array as described. This could
499 * be a new container, or an array in a pre-existing container.
500 * Also used to zero metadata prior to writing it to invalidate old
501 * metadata.
502 */
503 int (*init_super)(struct supertype *st, mdu_array_info_t *info,
504 unsigned long long size, char *name,
505 char *homehost, int *uuid);
506
507 /* update the metadata to include new device, either at create or
508 * when hot-adding a spare.
509 */
510 int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo,
511 int fd, char *devname);
512
513 /* Write metadata to one device when fixing problems or adding
514 * a new device.
515 */
516 int (*store_super)(struct supertype *st, int fd);
517
518 /* Write all metadata for this array.
519 */
520 int (*write_init_super)(struct supertype *st);
521 int (*compare_super)(struct supertype *st, struct supertype *tst);
522 int (*load_super)(struct supertype *st, int fd, char *devname);
523 struct supertype * (*match_metadata_desc)(char *arg);
524 __u64 (*avail_size)(struct supertype *st, __u64 size);
525 int (*add_internal_bitmap)(struct supertype *st, int *chunkp,
526 int delay, int write_behind,
527 unsigned long long size, int may_change, int major);
528 void (*locate_bitmap)(struct supertype *st, int fd);
529 int (*write_bitmap)(struct supertype *st, int fd);
530 void (*free_super)(struct supertype *st);
531
532 /* validate_geometry is called with an st returned by
533 * match_metadata_desc.
534 * It should check that the geometry described in compatible with
535 * the metadata type. It will be called repeatedly as devices
536 * added to validate changing size and new devices. If there are
537 * inter-device dependencies, it should record sufficient details
538 * so these can be validated.
539 * Both 'size' and '*freesize' are in sectors. chunk is bytes.
540 */
541 int (*validate_geometry)(struct supertype *st, int level, int layout,
542 int raiddisks,
543 int chunk, unsigned long long size,
544 char *subdev, unsigned long long *freesize,
545 int verbose);
546
547 struct mdinfo *(*container_content)(struct supertype *st);
548 /* Allow a metadata handler to override mdadm's default layouts */
549 int (*default_layout)(int level); /* optional */
550
551/* for mdmon */
552 int (*open_new)(struct supertype *c, struct active_array *a,
553 char *inst);
554
555 /* Tell the metadata handler the current state of the array.
556 * This covers whether it is known to be consistent (no pending writes)
557 * and how far along a resync is known to have progressed
558 * (in a->resync_start).
559 * resync status is really irrelevant if the array is not consistent,
560 * but some metadata (DDF!) have a place to record the distinction.
561 * If 'consistent' is '2', then the array can mark it dirty if a
562 * resync/recovery/whatever is required, or leave it clean if not.
563 * Return value is 0 dirty (not consistent) and 1 if clean.
564 * it is only really important if consistent is passed in as '2'.
565 */
566 int (*set_array_state)(struct active_array *a, int consistent);
567
568 /* When the state of a device might have changed, we call set_disk to
569 * tell the metadata what the current state is.
570 * Typically this happens on spare->in_sync and (spare|in_sync)->faulty
571 * transitions.
572 * set_disk might be called when the state of the particular disk has
573 * not in fact changed.
574 */
575 void (*set_disk)(struct active_array *a, int n, int state);
576 void (*sync_metadata)(struct supertype *st);
577 void (*process_update)(struct supertype *st,
578 struct metadata_update *update);
579 void (*prepare_update)(struct supertype *st,
580 struct metadata_update *update);
581
582 /* activate_spare will check if the array is degraded and, if it
583 * is, try to find some spare space in the container.
584 * On success, it add appropriate updates (For process_update) to
585 * to the 'updates' list and returns a list of 'mdinfo' identifying
586 * the device, or devices as there might be multiple missing
587 * devices and multiple spares available.
588 */
589 struct mdinfo *(*activate_spare)(struct active_array *a,
590 struct metadata_update **updates);
591
592 int swapuuid; /* true if uuid is bigending rather than hostendian */
593 int external;
594 const char *name; /* canonical metadata name */
595} super0, super1, super_ddf, *superlist[];
596
597extern struct superswitch super_imsm;
598
599struct metadata_update {
600 int len;
601 char *buf;
602 void *space; /* allocated space that monitor will use */
603 struct metadata_update *next;
604};
605
606/* A supertype holds a particular collection of metadata.
607 * It identifies the metadata type by the superswitch, and the particular
608 * sub-version of that metadata type.
609 * metadata read in or created is stored in 'sb' and 'info'.
610 * There are also fields used by mdmon to track containers.
611 *
612 * A supertype may refer to:
613 * Just an array, possibly in a container
614 * A container, not identifying any particular array
615 * Info read from just one device, not yet fully describing the array/container.
616 *
617 *
618 * A supertype is created by:
619 * super_by_fd
620 * guess_super
621 * dup_super
622 */
623struct supertype {
624 struct superswitch *ss;
625 int minor_version;
626 int max_devs;
627 int container_dev; /* devnum of container */
628 char subarray[32]; /* name of array inside container */
629 void *sb;
630 void *info;
631 int loaded_container; /* Set if load_super found a container,
632 * not just one device */
633
634 struct metadata_update *updates;
635 struct metadata_update **update_tail;
636
637 /* extra stuff used by mdmon */
638 struct active_array *arrays;
639 int sock; /* listen to external programs */
640 int devnum;
641 char *devname; /* e.g. md0. This appears in metadata_verison:
642 * external:/md0/12
643 */
644 int devcnt;
645
646 struct mdinfo *devs;
647
648};
649
650extern struct supertype *super_by_fd(int fd);
651extern struct supertype *guess_super(int fd);
652extern struct supertype *dup_super(struct supertype *st);
653extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
654extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
655 mdu_disk_info_t *disk);
656void wait_for(char *dev);
657
658#if __GNUC__ < 3
659struct stat64;
660#endif
661
662#define HAVE_NFTW we assume
663#define HAVE_FTW
664
665#ifdef __UCLIBC__
666# include <features.h>
667# ifndef __UCLIBC_HAS_LFS__
668# define lseek64 lseek
669# endif
670# ifndef __UCLIBC_HAS_FTW__
671# undef HAVE_FTW
672# undef HAVE_NFTW
673# endif
674#endif
675
676#ifdef __dietlibc__
677# undef HAVE_NFTW
678#endif
679
680#if defined(__KLIBC__)
681# undef HAVE_NFTW
682# undef HAVE_FTW
683#endif
684
685#ifndef HAVE_NFTW
686# define FTW_PHYS 1
687# ifndef HAVE_FTW
688 struct FTW {};
689# endif
690#endif
691
692#ifdef HAVE_FTW
693# include <ftw.h>
694#endif
695
696extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
697
698
699extern int Manage_ro(char *devname, int fd, int readonly);
700extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
701extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
702extern int Manage_reconfig(char *devname, int fd, int layout);
703extern int Manage_subdevs(char *devname, int fd,
704 mddev_dev_t devlist, int verbose);
705extern int autodetect(void);
706extern int Grow_Add_device(char *devname, int fd, char *newdev);
707extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
708extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
709 long long size,
710 int level, int layout, int chunksize, int raid_disks);
711extern int Grow_restart(struct supertype *st, struct mdinfo *info,
712 int *fdlist, int cnt, char *backup_file);
713
714
715extern int Assemble(struct supertype *st, char *mddev,
716 mddev_ident_t ident,
717 mddev_dev_t devlist, char *backup_file,
718 int readonly, int runstop,
719 char *update, char *homehost,
720 int verbose, int force);
721
722extern int Build(char *mddev, int chunk, int level, int layout,
723 int raiddisks, mddev_dev_t devlist, int assume_clean,
724 char *bitmap_file, int bitmap_chunk, int write_behind,
725 int delay, int verbose, int autof);
726
727
728extern int Create(struct supertype *st, char *mddev,
729 int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
730 char *name, char *homehost, int *uuid,
731 int subdevs, mddev_dev_t devlist,
732 int runstop, int verbose, int force, int assume_clean,
733 char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int autof);
734
735extern int Detail(char *dev, int brief, int export, int test, char *homehost);
736extern int Detail_Platform(struct superswitch *ss, int scan, int verbose);
737extern int Query(char *dev);
738extern int Examine(mddev_dev_t devlist, int brief, int export, int scan,
739 int SparcAdjust, struct supertype *forcest, char *homehost);
740extern int Monitor(mddev_dev_t devlist,
741 char *mailaddr, char *alert_cmd,
742 int period, int daemonise, int scan, int oneshot,
743 int dosyslog, int test, char *pidfile);
744
745extern int Kill(char *dev, int force, int quiet, int noexcl);
746extern int Wait(char *dev);
747extern int WaitClean(char *dev, int verbose);
748
749extern int Incremental(char *devname, int verbose, int runstop,
750 struct supertype *st, char *homehost, int autof);
751extern int Incremental_container(struct supertype *st, char *devname,
752 int verbose, int runstop, int autof,
753 int trustworthy);
754extern void RebuildMap(void);
755extern int IncrementalScan(int verbose);
756
757extern int CreateBitmap(char *filename, int force, char uuid[16],
758 unsigned long chunksize, unsigned long daemon_sleep,
759 unsigned long write_behind,
760 unsigned long long array_size,
761 int major);
762extern int ExamineBitmap(char *filename, int brief, struct supertype *st);
763extern int bitmap_update_uuid(int fd, int *uuid, int swap);
764extern unsigned long bitmap_sectors(struct bitmap_super_s *bsb);
765
766extern int md_get_version(int fd);
767extern int get_linux_version(void);
768extern int parse_uuid(char *str, int uuid[4]);
769extern int check_ext2(int fd, char *name);
770extern int check_reiser(int fd, char *name);
771extern int check_raid(int fd, char *name);
772
773extern int get_mdp_major(void);
774extern int dev_open(char *dev, int flags);
775extern int open_dev(int devnum);
776extern int open_dev_excl(int devnum);
777extern int is_standard(char *dev, int *nump);
778extern int same_dev(char *one, char *two);
779
780extern int parse_auto(char *str, char *msg, int config);
781extern mddev_ident_t conf_get_ident(char *dev);
782extern mddev_dev_t conf_get_devs(void);
783extern int conf_test_dev(char *devname);
784extern struct createinfo *conf_get_create_info(void);
785extern void set_conffile(char *file);
786extern char *conf_get_mailaddr(void);
787extern char *conf_get_mailfrom(void);
788extern char *conf_get_program(void);
789extern char *conf_get_homehost(void);
790extern char *conf_line(FILE *file);
791extern char *conf_word(FILE *file, int allow_key);
792extern void free_line(char *line);
793extern int match_oneof(char *devices, char *devname);
794extern void uuid_from_super(int uuid[4], mdp_super_t *super);
795extern const int uuid_match_any[4];
796extern int same_uuid(int a[4], int b[4], int swapuuid);
797extern void copy_uuid(void *a, int b[4], int swapuuid);
798extern char *fname_from_uuid(struct supertype *st,
799 struct mdinfo *info, char *buf, char sep);
800extern unsigned long calc_csum(void *super, int bytes);
801extern int enough(int level, int raid_disks, int layout, int clean,
802 char *avail, int avail_disks);
803extern int ask(char *mesg);
804extern unsigned long long get_component_size(int fd);
805extern void remove_partitions(int fd);
806extern unsigned long long calc_array_size(int level, int raid_disks, int layout,
807 int chunksize, unsigned long long devsize);
808extern int flush_metadata_updates(struct supertype *st);
809extern void append_metadata_update(struct supertype *st, void *buf, int len);
810extern int assemble_container_content(struct supertype *st, int mdfd,
811 struct mdinfo *content, int runstop,
812 char *chosen_name, int verbose);
813
814extern int add_disk(int mdfd, struct supertype *st,
815 struct mdinfo *sra, struct mdinfo *info);
816extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info);
817
818extern char *human_size(long long bytes);
819extern char *human_size_brief(long long bytes);
820extern void print_r10_layout(int layout);
821
822#define NoMdDev (1<<23)
823extern int find_free_devnum(int use_partitions);
824
825extern void put_md_name(char *name);
826extern char *get_md_name(int dev);
827
828extern char DefaultConfFile[];
829
830extern int create_mddev(char *dev, char *name, int autof, int trustworthy,
831 char *chosen);
832/* values for 'trustworthy' */
833#define LOCAL 1
834#define FOREIGN 2
835#define METADATA 3
836extern int open_mddev(char *dev, int report_errors);
837extern int open_container(int fd);
838
839extern int mdmon_running(int devnum);
840extern int signal_mdmon(int devnum);
841extern int check_env(char *name);
842extern int start_mdmon(int devnum);
843
844extern char *devnum2devname(int num);
845extern int devname2devnum(char *name);
846extern int stat2devnum(struct stat *st);
847extern int fd2devnum(int fd);
848
849static inline int dev2major(int d)
850{
851 if (d >= 0)
852 return MD_MAJOR;
853 else
854 return get_mdp_major();
855}
856
857static inline int dev2minor(int d)
858{
859 if (d >= 0)
860 return d;
861 return (-1-d) << MdpMinorShift;
862}
863
864static inline int ROUND_UP(int a, int base)
865{
866 return ((a+base-1)/base)*base;
867}
868
869static inline int is_subarray(char *vers)
870{
871 /* The version string for a 'subarray' (an array in a container)
872 * is
873 * /containername/componentname for normal read-write arrays
874 * -containername/componentname for read-only arrays.
875 * containername is e.g. md0, md_d1
876 * componentname is dependant on the metadata. e.g. '1' 'S1' ...
877 */
878 return (*vers == '/' || *vers == '-');
879}
880
881#ifdef DEBUG
882#define dprintf(fmt, arg...) \
883 fprintf(stderr, fmt, ##arg)
884#else
885#define dprintf(fmt, arg...) \
886 ({ if (0) fprintf(stderr, fmt, ##arg); 0; })
887#endif
888#include <assert.h>
889#include <stdarg.h>
890static inline int xasprintf(char **strp, const char *fmt, ...) {
891 va_list ap;
892 int ret;
893 va_start(ap, fmt);
894 ret = vasprintf(strp, fmt, ap);
895 va_end(ap);
896 assert(ret >= 0);
897 return ret;
898}
899
900#define LEVEL_MULTIPATH (-4)
901#define LEVEL_LINEAR (-1)
902#define LEVEL_FAULTY (-5)
903
904/* kernel module doesn't know about these */
905#define LEVEL_CONTAINER (-100)
906#define LEVEL_UNSUPPORTED (-200)
907
908
909/* faulty stuff */
910
911#define WriteTransient 0
912#define ReadTransient 1
913#define WritePersistent 2
914#define ReadPersistent 3
915#define WriteAll 4 /* doesn't go to device */
916#define ReadFixable 5
917#define Modes 6
918
919#define ClearErrors 31
920#define ClearFaults 30
921
922#define AllPersist 100 /* internal use only */
923#define NoPersist 101
924
925#define ModeMask 0x1f
926#define ModeShift 5
927
928
929#ifdef __TINYC__
930#undef minor
931#undef major
932#undef makedev
933#define minor(x) ((x)&0xff)
934#define major(x) (((x)>>8)&0xff)
935#define makedev(M,m) (((M)<<8) | (m))
936#endif
937
938/* for raid5 */
939#define ALGORITHM_LEFT_ASYMMETRIC 0
940#define ALGORITHM_RIGHT_ASYMMETRIC 1
941#define ALGORITHM_LEFT_SYMMETRIC 2
942#define ALGORITHM_RIGHT_SYMMETRIC 3
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