2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
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.
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.
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
22 * Email: <neilb@suse.de>
26 #define _FILE_OFFSET_BITS 64
28 #if !defined(__dietlibc__) && !defined(__KLIBC__)
29 extern __off64_t lseek64
__P ((int __fd
, __off64_t __offset
, int __whence
));
31 # if defined(__NO_STAT64) || __WORDSIZE != 32
32 # define lseek64 lseek
36 #include <sys/types.h>
49 /* dietlibc has deprecated random and srandom!! */
55 #include <linux/kdev_t.h>
56 /*#include <linux/fs.h> */
57 #include <sys/mount.h>
58 #include <asm/types.h>
59 #include <sys/ioctl.h>
61 #define MdpMinorShift 6
64 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
67 #define DEFAULT_BITMAP_CHUNK 4096
68 #define DEFAULT_BITMAP_DELAY 5
69 #define DEFAULT_MAX_WRITE_BEHIND 256
77 /* Redhat don't like to #include <asm/byteorder.h>, and
78 * some time include <linux/byteorder/xxx_endian.h> isn't enough,
79 * and there is no standard conversion function so... */
80 /* And dietlibc doesn't think byteswap is ok, so.. */
81 /* #include <byteswap.h> */
82 #define bswap_16(x) (((x) & 0x00ffU) << 8 | \
84 #define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
85 ((x) & 0xff000000U) >> 24 | \
86 ((x) & 0x0000ff00U) << 8 | \
87 ((x) & 0x00ff0000U) >> 8)
88 #define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
89 ((x) & 0xff00000000000000ULL) >> 56 | \
90 ((x) & 0x000000000000ff00ULL) << 40 | \
91 ((x) & 0x00ff000000000000ULL) >> 40 | \
92 ((x) & 0x0000000000ff0000ULL) << 24 | \
93 ((x) & 0x0000ff0000000000ULL) >> 24 | \
94 ((x) & 0x00000000ff000000ULL) << 8 | \
95 ((x) & 0x000000ff00000000ULL) >> 8)
97 #if !defined(__KLIBC__)
98 #if BYTE_ORDER == LITTLE_ENDIAN
99 #define __cpu_to_le16(_x) (_x)
100 #define __cpu_to_le32(_x) (_x)
101 #define __cpu_to_le64(_x) (_x)
102 #define __le16_to_cpu(_x) (_x)
103 #define __le32_to_cpu(_x) (_x)
104 #define __le64_to_cpu(_x) (_x)
106 #define __cpu_to_be16(_x) bswap_16(_x)
107 #define __cpu_to_be32(_x) bswap_32(_x)
108 #define __cpu_to_be64(_x) bswap_64(_x)
109 #define __be16_to_cpu(_x) bswap_16(_x)
110 #define __be32_to_cpu(_x) bswap_32(_x)
111 #define __be64_to_cpu(_x) bswap_64(_x)
112 #elif BYTE_ORDER == BIG_ENDIAN
113 #define __cpu_to_le16(_x) bswap_16(_x)
114 #define __cpu_to_le32(_x) bswap_32(_x)
115 #define __cpu_to_le64(_x) bswap_64(_x)
116 #define __le16_to_cpu(_x) bswap_16(_x)
117 #define __le32_to_cpu(_x) bswap_32(_x)
118 #define __le64_to_cpu(_x) bswap_64(_x)
120 #define __cpu_to_be16(_x) (_x)
121 #define __cpu_to_be32(_x) (_x)
122 #define __cpu_to_be64(_x) (_x)
123 #define __be16_to_cpu(_x) (_x)
124 #define __be32_to_cpu(_x) (_x)
125 #define __be64_to_cpu(_x) (_x)
127 # error "unknown endianness."
129 #endif /* __KLIBC__ */
133 /* general information that might be extracted from a superblock */
135 mdu_array_info_t array
;
136 mdu_disk_info_t disk
;
140 unsigned long long data_offset
;
141 unsigned long long component_size
; /* same as array.size, except in
142 * sectors and up to 64bits.
144 unsigned long long custom_array_size
; /* size for non-default sized
145 * arrays (in sectors)
148 unsigned long long reshape_progress
;
150 unsigned long long resync_start
; /* per-array resync position */
151 unsigned long long recovery_start
; /* per-device rebuild position */
152 #define MaxSector (~0ULL) /* resync/recovery complete position */
154 unsigned long safe_mode_delay
; /* ms delay to mark clean */
155 int new_level
, delta_disks
, new_layout
, new_chunk
;
157 int cache_size
; /* size of raid456 stripe cache*/
159 char text_version
[50];
160 void *update_private
; /* for passing metadata-format
161 * specific update data
162 * between successive calls to
166 int container_member
; /* for assembling external-metatdata arrays
167 * This is to be used internally by metadata
174 /* Device info for mdmon: */
179 #define DS_WRITE_MOSTLY 4
181 #define DS_BLOCKED 16
182 #define DS_REMOVE 1024
183 #define DS_UNBLOCK 2048
184 int prev_state
, curr_state
, next_state
;
194 struct supertype
*supertype
;
211 extern char short_options
[];
212 extern char short_bitmap_options
[];
213 extern char short_bitmap_auto_options
[];
214 extern struct option long_options
[];
215 extern char Version
[], Usage
[], Help
[], OptionHelp
[],
216 Help_create
[], Help_build
[], Help_assemble
[], Help_grow
[],
218 Help_manage
[], Help_misc
[], Help_monitor
[], Help_config
[];
220 /* for option that don't have short equivilents, we assign arbitrary
221 * small numbers. '1' means an undecorated option, so we start at '2'.
223 enum special_options
{
239 /* structures read from config file */
240 /* List of mddevice names and identifiers
241 * Identifiers can be:
243 * super-minor=decimal-minor-number-from-superblock
244 * devices=comma,separated,list,of,device,names,with,wildcards
246 * If multiple fields are present, the intersection of all matching
247 * devices is considered
249 #define UnSet (0xfffe)
250 typedef struct mddev_ident_s
{
257 unsigned int super_minor
;
259 char *devices
; /* comma separated list of device
260 * names with wild cards
263 unsigned int raid_disks
;
264 unsigned int spare_disks
;
265 struct supertype
*st
;
266 int autof
; /* 1 for normal, 2 for partitioned */
271 char *container
; /* /dev/whatever name of container, or
272 * uuid of container. You would expect
273 * this to be the 'devname' or UUID
274 * of some other entry.
276 char *member
; /* subarray within a container */
278 struct mddev_ident_s
*next
;
281 /* List of device names - wildcards expanded */
282 typedef struct mddev_dev_s
{
284 char disposition
; /* 'a' for add, 'r' for remove, 'f' for fail.
285 * Not set for names read from .config
287 char writemostly
; /* 1 for 'set writemostly', 2 for 'clear writemostly' */
289 char used
; /* set when used */
290 struct mdinfo
*content
; /* If devname is a container, this might list
291 * the remaining member arrays. */
292 struct mddev_dev_s
*next
;
295 typedef struct mapping
{
306 char *pattern
; /* U or up, _ for down */
307 int percent
; /* -1 if no resync */
308 int resync
; /* 1 if resync, 0 if recovery */
312 char * metadata_version
;
313 struct mdstat_ent
*next
;
316 extern struct mdstat_ent
*mdstat_read(int hold
, int start
);
317 extern void free_mdstat(struct mdstat_ent
*ms
);
318 extern void mdstat_wait(int seconds
);
319 extern void mdstat_wait_fd(int fd
, const sigset_t
*sigmask
);
320 extern int mddev_busy(int devnum
);
323 struct map_ent
*next
;
330 extern int map_update(struct map_ent
**mpp
, int devnum
, char *metadata
,
331 int uuid
[4], char *path
);
332 extern struct map_ent
*map_by_uuid(struct map_ent
**map
, int uuid
[4]);
333 extern struct map_ent
*map_by_devnum(struct map_ent
**map
, int devnum
);
334 extern struct map_ent
*map_by_name(struct map_ent
**map
, char *name
);
335 extern void map_read(struct map_ent
**melp
);
336 extern int map_write(struct map_ent
*mel
);
337 extern void map_delete(struct map_ent
**mapp
, int devnum
);
338 extern void map_free(struct map_ent
*map
);
339 extern void map_add(struct map_ent
**melp
,
340 int devnum
, char *metadata
, int uuid
[4], char *path
);
341 extern int map_lock(struct map_ent
**melp
);
342 extern void map_unlock(struct map_ent
**melp
);
344 /* various details can be requested */
345 enum sysfs_read_flags
{
346 GET_LEVEL
= (1 << 0),
347 GET_LAYOUT
= (1 << 1),
348 GET_COMPONENT
= (1 << 2),
349 GET_CHUNK
= (1 << 3),
350 GET_CACHE
= (1 << 4),
351 GET_MISMATCH
= (1 << 5),
352 GET_VERSION
= (1 << 6),
353 GET_DISKS
= (1 << 7),
354 GET_DEGRADED
= (1 << 8),
355 GET_SAFEMODE
= (1 << 9),
356 GET_DEVS
= (1 << 10), /* gets role, major, minor */
357 GET_OFFSET
= (1 << 11),
358 GET_SIZE
= (1 << 12),
359 GET_STATE
= (1 << 13),
360 GET_ERROR
= (1 << 14),
361 SKIP_GONE_DEVS
= (1 << 15),
364 /* If fd >= 0, get the array it is open on,
365 * else use devnum. >=0 -> major9. <0.....
367 extern int sysfs_open(int devnum
, char *devname
, char *attr
);
368 extern void sysfs_init(struct mdinfo
*mdi
, int fd
, int devnum
);
369 extern void sysfs_free(struct mdinfo
*sra
);
370 extern struct mdinfo
*sysfs_read(int fd
, int devnum
, unsigned long options
);
371 extern int sysfs_attr_match(const char *attr
, const char *str
);
372 extern int sysfs_match_word(const char *word
, char **list
);
373 extern int sysfs_set_str(struct mdinfo
*sra
, struct mdinfo
*dev
,
374 char *name
, char *val
);
375 extern int sysfs_set_num(struct mdinfo
*sra
, struct mdinfo
*dev
,
376 char *name
, unsigned long long val
);
377 extern int sysfs_uevent(struct mdinfo
*sra
, char *event
);
378 extern int sysfs_get_fd(struct mdinfo
*sra
, struct mdinfo
*dev
,
380 extern int sysfs_fd_get_ll(int fd
, unsigned long long *val
);
381 extern int sysfs_get_ll(struct mdinfo
*sra
, struct mdinfo
*dev
,
382 char *name
, unsigned long long *val
);
383 extern int sysfs_fd_get_str(int fd
, char *val
, int size
);
384 extern int sysfs_get_str(struct mdinfo
*sra
, struct mdinfo
*dev
,
385 char *name
, char *val
, int size
);
386 extern int sysfs_set_safemode(struct mdinfo
*sra
, unsigned long ms
);
387 extern int sysfs_set_array(struct mdinfo
*info
, int vers
);
388 extern int sysfs_add_disk(struct mdinfo
*sra
, struct mdinfo
*sd
, int resume
);
389 extern int sysfs_disk_to_scsi_id(int fd
, __u32
*id
);
390 extern int sysfs_unique_holder(int devnum
, long rdev
);
391 extern int load_sys(char *path
, char *buf
);
394 extern int save_stripes(int *source
, unsigned long long *offsets
,
395 int raid_disks
, int chunk_size
, int level
, int layout
,
396 int nwrites
, int *dest
,
397 unsigned long long start
, unsigned long long length
,
399 extern int restore_stripes(int *dest
, unsigned long long *offsets
,
400 int raid_disks
, int chunk_size
, int level
, int layout
,
401 int source
, unsigned long long read_offset
,
402 unsigned long long start
, unsigned long long length
);
405 #define Sendmail "/usr/lib/sendmail -t"
408 #define SYSLOG_FACILITY LOG_DAEMON
410 extern char *map_num(mapping_t
*map
, int num
);
411 extern int map_name(mapping_t
*map
, char *name
);
412 extern mapping_t r5layout
[], r6layout
[], pers
[], modes
[], faultylayout
[];
414 extern char *map_dev(int major
, int minor
, int create
);
417 struct metadata_update
;
419 /* A superswitch provides entry point the a metadata handler.
421 * The super_switch primarily operates on some "metadata" that
422 * is accessed via the 'supertype'.
423 * This metadata has one of three possible sources.
424 * 1/ It is read from a single device. In this case it may not completely
425 * describe the array or arrays as some information might be on other
427 * 2/ It is read from all devices in a container. In this case all
428 * information is present.
429 * 3/ It is created by ->init_super / ->add_to_super. In this case it will
430 * be complete once enough ->add_to_super calls have completed.
432 * When creating an array inside a container, the metadata will be
433 * formed by a combination of 2 and 3. The metadata or the array is read,
434 * then new information is added.
436 * The metadata must sometimes have a concept of a 'current' array
437 * and a 'current' device.
438 * The 'current' array is set by init_super to be the newly created array,
439 * or is set by super_by_fd when it finds it is looking at an array inside
442 * The 'current' device is either the device that the metadata was read from
443 * in case 1, or the last device added by add_to_super in case 3.
444 * Case 2 does not identify a 'current' device.
446 extern struct superswitch
{
448 /* Used to report details of metadata read from a component
449 * device. ->load_super has been called.
451 void (*examine_super
)(struct supertype
*st
, char *homehost
);
452 void (*brief_examine_super
)(struct supertype
*st
, int verbose
);
453 void (*brief_examine_subarrays
)(struct supertype
*st
, int verbose
);
454 void (*export_examine_super
)(struct supertype
*st
);
456 /* Used to report details of an active array.
457 * ->load_super was possibly given a 'component' string.
459 void (*detail_super
)(struct supertype
*st
, char *homehost
);
460 void (*brief_detail_super
)(struct supertype
*st
);
461 void (*export_detail_super
)(struct supertype
*st
);
463 /* Optional: platform hardware / firmware details */
464 int (*detail_platform
)(int verbose
, int enumerate_only
);
467 * to get uuid to storing in bitmap metadata
468 * and 'reshape' backup-data metadata
469 * To see if a device is being re-added to an array it was part of.
471 void (*uuid_from_super
)(struct supertype
*st
, int uuid
[4]);
473 /* Extract generic details from metadata. This could be details about
474 * the container, or about an individual array within the container.
475 * The determination is made either by:
476 * load_super being given a 'component' string.
477 * validate_geometry determining what to create.
478 * The info includes both array information and device information.
479 * The particular device should be:
480 * The last device added by add_to_super
481 * The device the metadata was loaded from by load_super
483 void (*getinfo_super
)(struct supertype
*st
, struct mdinfo
*info
);
485 /* Check if the given metadata is flagged as belonging to "this"
486 * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost"
488 int (*match_home
)(struct supertype
*st
, char *homehost
);
490 /* Make one of several generic modifications to metadata
491 * prior to assembly (or other times).
492 * sparc2.2 - first bug in early 0.90 metadata
493 * super-minor - change name of 0.90 metadata
494 * summaries - 'correct' any redundant data
495 * resync - mark array as dirty to trigger a resync.
496 * uuid - set new uuid - only 0.90 or 1.x
497 * name - change the name of the array (where supported)
498 * homehost - change which host this array is tied to.
499 * devicesize - If metadata is at start of device, change recorded
500 * device size to match actual device size
501 * byteorder - swap bytes for 0.90 metadata
503 * force-one - mark that device as uptodate, not old or failed.
504 * force-array - mark array as clean if it would not otherwise
506 * assemble - not sure how this is different from force-one...
507 * linear-grow-new - add a new device to a linear array, but don't
508 * change the size: so superblock still matches
509 * linear-grow-update - now change the size of the array.
511 int (*update_super
)(struct supertype
*st
, struct mdinfo
*info
,
513 char *devname
, int verbose
,
514 int uuid_set
, char *homehost
);
516 /* Create new metadata for new array as described. This could
517 * be a new container, or an array in a pre-existing container.
518 * Also used to zero metadata prior to writing it to invalidate old
521 int (*init_super
)(struct supertype
*st
, mdu_array_info_t
*info
,
522 unsigned long long size
, char *name
,
523 char *homehost
, int *uuid
);
525 /* update the metadata to include new device, either at create or
526 * when hot-adding a spare.
528 int (*add_to_super
)(struct supertype
*st
, mdu_disk_info_t
*dinfo
,
529 int fd
, char *devname
);
531 /* Write metadata to one device when fixing problems or adding
534 int (*store_super
)(struct supertype
*st
, int fd
);
536 /* Write all metadata for this array.
538 int (*write_init_super
)(struct supertype
*st
);
539 int (*compare_super
)(struct supertype
*st
, struct supertype
*tst
);
540 int (*load_super
)(struct supertype
*st
, int fd
, char *devname
);
541 struct supertype
* (*match_metadata_desc
)(char *arg
);
542 __u64 (*avail_size
)(struct supertype
*st
, __u64 size
);
543 int (*add_internal_bitmap
)(struct supertype
*st
, int *chunkp
,
544 int delay
, int write_behind
,
545 unsigned long long size
, int may_change
, int major
);
546 void (*locate_bitmap
)(struct supertype
*st
, int fd
);
547 int (*write_bitmap
)(struct supertype
*st
, int fd
);
548 void (*free_super
)(struct supertype
*st
);
550 /* validate_geometry is called with an st returned by
551 * match_metadata_desc.
552 * It should check that the geometry described in compatible with
553 * the metadata type. It will be called repeatedly as devices
554 * added to validate changing size and new devices. If there are
555 * inter-device dependencies, it should record sufficient details
556 * so these can be validated.
557 * Both 'size' and '*freesize' are in sectors. chunk is bytes.
559 int (*validate_geometry
)(struct supertype
*st
, int level
, int layout
,
561 int chunk
, unsigned long long size
,
562 char *subdev
, unsigned long long *freesize
,
565 struct mdinfo
*(*container_content
)(struct supertype
*st
);
566 /* Allow a metadata handler to override mdadm's default layouts */
567 int (*default_layout
)(int level
); /* optional */
570 int (*open_new
)(struct supertype
*c
, struct active_array
*a
,
573 /* Tell the metadata handler the current state of the array.
574 * This covers whether it is known to be consistent (no pending writes)
575 * and how far along a resync is known to have progressed
576 * (in a->resync_start).
577 * resync status is really irrelevant if the array is not consistent,
578 * but some metadata (DDF!) have a place to record the distinction.
579 * If 'consistent' is '2', then the array can mark it dirty if a
580 * resync/recovery/whatever is required, or leave it clean if not.
581 * Return value is 0 dirty (not consistent) and 1 if clean.
582 * it is only really important if consistent is passed in as '2'.
584 int (*set_array_state
)(struct active_array
*a
, int consistent
);
586 /* When the state of a device might have changed, we call set_disk to
587 * tell the metadata what the current state is.
588 * Typically this happens on spare->in_sync and (spare|in_sync)->faulty
590 * set_disk might be called when the state of the particular disk has
591 * not in fact changed.
593 void (*set_disk
)(struct active_array
*a
, int n
, int state
);
594 void (*sync_metadata
)(struct supertype
*st
);
595 void (*process_update
)(struct supertype
*st
,
596 struct metadata_update
*update
);
597 void (*prepare_update
)(struct supertype
*st
,
598 struct metadata_update
*update
);
600 /* activate_spare will check if the array is degraded and, if it
601 * is, try to find some spare space in the container.
602 * On success, it add appropriate updates (For process_update) to
603 * to the 'updates' list and returns a list of 'mdinfo' identifying
604 * the device, or devices as there might be multiple missing
605 * devices and multiple spares available.
607 struct mdinfo
*(*activate_spare
)(struct active_array
*a
,
608 struct metadata_update
**updates
);
610 int swapuuid
; /* true if uuid is bigending rather than hostendian */
612 const char *name
; /* canonical metadata name */
613 } super0
, super1
, super_ddf
, *superlist
[];
615 extern struct superswitch super_imsm
;
617 struct metadata_update
{
620 void *space
; /* allocated space that monitor will use */
621 struct metadata_update
*next
;
624 /* A supertype holds a particular collection of metadata.
625 * It identifies the metadata type by the superswitch, and the particular
626 * sub-version of that metadata type.
627 * metadata read in or created is stored in 'sb' and 'info'.
628 * There are also fields used by mdmon to track containers.
630 * A supertype may refer to:
631 * Just an array, possibly in a container
632 * A container, not identifying any particular array
633 * Info read from just one device, not yet fully describing the array/container.
636 * A supertype is created by:
642 struct superswitch
*ss
;
645 int container_dev
; /* devnum of container */
646 char subarray
[32]; /* name of array inside container */
649 int loaded_container
; /* Set if load_super found a container,
650 * not just one device */
652 struct metadata_update
*updates
;
653 struct metadata_update
**update_tail
;
655 /* extra stuff used by mdmon */
656 struct active_array
*arrays
;
657 int sock
; /* listen to external programs */
659 char *devname
; /* e.g. md0. This appears in metadata_verison:
668 extern struct supertype
*super_by_fd(int fd
);
669 extern struct supertype
*guess_super(int fd
);
670 extern struct supertype
*dup_super(struct supertype
*st
);
671 extern int get_dev_size(int fd
, char *dname
, unsigned long long *sizep
);
672 extern void get_one_disk(int mdfd
, mdu_array_info_t
*ainf
,
673 mdu_disk_info_t
*disk
);
674 void wait_for(char *dev
, int fd
);
680 #define HAVE_NFTW we assume
684 # include <features.h>
685 # ifndef __UCLIBC_HAS_LFS__
686 # define lseek64 lseek
688 # ifndef __UCLIBC_HAS_FTW__
698 #if defined(__KLIBC__)
714 extern int add_dev(const char *name
, const struct stat
*stb
, int flag
, struct FTW
*s
);
717 extern int Manage_ro(char *devname
, int fd
, int readonly
);
718 extern int Manage_runstop(char *devname
, int fd
, int runstop
, int quiet
);
719 extern int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
);
720 extern int Manage_subdevs(char *devname
, int fd
,
721 mddev_dev_t devlist
, int verbose
);
722 extern int autodetect(void);
723 extern int Grow_Add_device(char *devname
, int fd
, char *newdev
);
724 extern int Grow_addbitmap(char *devname
, int fd
, char *file
, int chunk
, int delay
, int write_behind
, int force
);
725 extern int Grow_reshape(char *devname
, int fd
, int quiet
, char *backup_file
,
727 int level
, char *layout_str
, int chunksize
, int raid_disks
);
728 extern int Grow_restart(struct supertype
*st
, struct mdinfo
*info
,
729 int *fdlist
, int cnt
, char *backup_file
, int verbose
);
730 extern int Grow_continue(int mdfd
, struct supertype
*st
,
731 struct mdinfo
*info
, char *backup_file
);
733 extern int Assemble(struct supertype
*st
, char *mddev
,
735 mddev_dev_t devlist
, char *backup_file
,
736 int readonly
, int runstop
,
737 char *update
, char *homehost
, int require_homehost
,
738 int verbose
, int force
);
740 extern int Build(char *mddev
, int chunk
, int level
, int layout
,
741 int raiddisks
, mddev_dev_t devlist
, int assume_clean
,
742 char *bitmap_file
, int bitmap_chunk
, int write_behind
,
743 int delay
, int verbose
, int autof
, unsigned long long size
);
746 extern int Create(struct supertype
*st
, char *mddev
,
747 int chunk
, int level
, int layout
, unsigned long long size
, int raiddisks
, int sparedisks
,
748 char *name
, char *homehost
, int *uuid
,
749 int subdevs
, mddev_dev_t devlist
,
750 int runstop
, int verbose
, int force
, int assume_clean
,
751 char *bitmap_file
, int bitmap_chunk
, int write_behind
, int delay
, int autof
);
753 extern int Detail(char *dev
, int brief
, int export
, int test
, char *homehost
);
754 extern int Detail_Platform(struct superswitch
*ss
, int scan
, int verbose
);
755 extern int Query(char *dev
);
756 extern int Examine(mddev_dev_t devlist
, int brief
, int export
, int scan
,
757 int SparcAdjust
, struct supertype
*forcest
, char *homehost
);
758 extern int Monitor(mddev_dev_t devlist
,
759 char *mailaddr
, char *alert_cmd
,
760 int period
, int daemonise
, int scan
, int oneshot
,
761 int dosyslog
, int test
, char *pidfile
, int increments
);
763 extern int Kill(char *dev
, struct supertype
*st
, int force
, int quiet
, int noexcl
);
764 extern int Wait(char *dev
);
765 extern int WaitClean(char *dev
, int sock
, int verbose
);
767 extern int Incremental(char *devname
, int verbose
, int runstop
,
768 struct supertype
*st
, char *homehost
, int require_homehost
,
770 extern int Incremental_container(struct supertype
*st
, char *devname
,
771 int verbose
, int runstop
, int autof
,
773 extern void RebuildMap(void);
774 extern int IncrementalScan(int verbose
);
776 extern int CreateBitmap(char *filename
, int force
, char uuid
[16],
777 unsigned long chunksize
, unsigned long daemon_sleep
,
778 unsigned long write_behind
,
779 unsigned long long array_size
,
781 extern int ExamineBitmap(char *filename
, int brief
, struct supertype
*st
);
782 extern int bitmap_update_uuid(int fd
, int *uuid
, int swap
);
783 extern unsigned long bitmap_sectors(struct bitmap_super_s
*bsb
);
785 extern int md_get_version(int fd
);
786 extern int get_linux_version(void);
787 extern long long parse_size(char *size
);
788 extern int parse_uuid(char *str
, int uuid
[4]);
789 extern int parse_layout_10(char *layout
);
790 extern int parse_layout_faulty(char *layout
);
791 extern int check_ext2(int fd
, char *name
);
792 extern int check_reiser(int fd
, char *name
);
793 extern int check_raid(int fd
, char *name
);
795 extern int get_mdp_major(void);
796 extern int dev_open(char *dev
, int flags
);
797 extern int open_dev(int devnum
);
798 extern int open_dev_excl(int devnum
);
799 extern int is_standard(char *dev
, int *nump
);
800 extern int same_dev(char *one
, char *two
);
802 extern int parse_auto(char *str
, char *msg
, int config
);
803 extern mddev_ident_t
conf_get_ident(char *dev
);
804 extern mddev_dev_t
conf_get_devs(void);
805 extern int conf_test_dev(char *devname
);
806 extern int conf_test_metadata(const char *version
);
807 extern struct createinfo
*conf_get_create_info(void);
808 extern void set_conffile(char *file
);
809 extern char *conf_get_mailaddr(void);
810 extern char *conf_get_mailfrom(void);
811 extern char *conf_get_program(void);
812 extern char *conf_get_homehost(int *require_homehostp
);
813 extern char *conf_line(FILE *file
);
814 extern char *conf_word(FILE *file
, int allow_key
);
815 extern int conf_name_is_free(char *name
);
816 extern int devname_matches(char *name
, char *match
);
817 extern struct mddev_ident_s
*conf_match(struct mdinfo
*info
, struct supertype
*st
);
819 extern void free_line(char *line
);
820 extern int match_oneof(char *devices
, char *devname
);
821 extern void uuid_from_super(int uuid
[4], mdp_super_t
*super
);
822 extern const int uuid_match_any
[4];
823 extern int same_uuid(int a
[4], int b
[4], int swapuuid
);
824 extern void copy_uuid(void *a
, int b
[4], int swapuuid
);
825 extern char *__fname_from_uuid(int id
[4], int swap
, char *buf
, char sep
);
826 extern char *fname_from_uuid(struct supertype
*st
,
827 struct mdinfo
*info
, char *buf
, char sep
);
828 extern unsigned long calc_csum(void *super
, int bytes
);
829 extern int enough(int level
, int raid_disks
, int layout
, int clean
,
830 char *avail
, int avail_disks
);
831 extern int ask(char *mesg
);
832 extern unsigned long long get_component_size(int fd
);
833 extern void remove_partitions(int fd
);
834 extern unsigned long long calc_array_size(int level
, int raid_disks
, int layout
,
835 int chunksize
, unsigned long long devsize
);
836 extern int flush_metadata_updates(struct supertype
*st
);
837 extern void append_metadata_update(struct supertype
*st
, void *buf
, int len
);
838 extern int assemble_container_content(struct supertype
*st
, int mdfd
,
839 struct mdinfo
*content
, int runstop
,
840 char *chosen_name
, int verbose
);
842 extern int add_disk(int mdfd
, struct supertype
*st
,
843 struct mdinfo
*sra
, struct mdinfo
*info
);
844 extern int set_array_info(int mdfd
, struct supertype
*st
, struct mdinfo
*info
);
846 extern char *human_size(long long bytes
);
847 extern char *human_size_brief(long long bytes
);
848 extern void print_r10_layout(int layout
);
850 #define NoMdDev (1<<23)
851 extern int find_free_devnum(int use_partitions
);
853 extern void put_md_name(char *name
);
854 extern char *get_md_name(int dev
);
856 extern char DefaultConfFile
[];
858 extern int create_mddev(char *dev
, char *name
, int autof
, int trustworthy
,
860 /* values for 'trustworthy' */
864 extern int open_mddev(char *dev
, int report_errors
);
865 extern int open_container(int fd
);
867 extern int mdmon_running(int devnum
);
868 extern int signal_mdmon(int devnum
);
869 extern int check_env(char *name
);
870 extern __u32
random32(void);
871 extern int start_mdmon(int devnum
);
873 extern char *devnum2devname(int num
);
874 extern int devname2devnum(char *name
);
875 extern int stat2devnum(struct stat
*st
);
876 extern int fd2devnum(int fd
);
878 static inline int dev2major(int d
)
883 return get_mdp_major();
886 static inline int dev2minor(int d
)
890 return (-1-d
) << MdpMinorShift
;
893 static inline int ROUND_UP(int a
, int base
)
895 return ((a
+base
-1)/base
)*base
;
898 static inline int is_subarray(char *vers
)
900 /* The version string for a 'subarray' (an array in a container)
902 * /containername/componentname for normal read-write arrays
903 * -containername/componentname for read-only arrays.
904 * containername is e.g. md0, md_d1
905 * componentname is dependant on the metadata. e.g. '1' 'S1' ...
907 return (*vers
== '/' || *vers
== '-');
911 #define dprintf(fmt, arg...) \
912 fprintf(stderr, fmt, ##arg)
914 #define dprintf(fmt, arg...) \
915 ({ if (0) fprintf(stderr, fmt, ##arg); 0; })
919 static inline int xasprintf(char **strp
, const char *fmt
, ...) {
923 ret
= vasprintf(strp
, fmt
, ap
);
929 #define LEVEL_MULTIPATH (-4)
930 #define LEVEL_LINEAR (-1)
931 #define LEVEL_FAULTY (-5)
933 /* kernel module doesn't know about these */
934 #define LEVEL_CONTAINER (-100)
935 #define LEVEL_UNSUPPORTED (-200)
940 #define WriteTransient 0
941 #define ReadTransient 1
942 #define WritePersistent 2
943 #define ReadPersistent 3
944 #define WriteAll 4 /* doesn't go to device */
945 #define ReadFixable 5
948 #define ClearErrors 31
949 #define ClearFaults 30
951 #define AllPersist 100 /* internal use only */
952 #define NoPersist 101
954 #define ModeMask 0x1f
962 #define minor(x) ((x)&0xff)
963 #define major(x) (((x)>>8)&0xff)
964 #define makedev(M,m) (((M)<<8) | (m))
968 #define ALGORITHM_LEFT_ASYMMETRIC 0
969 #define ALGORITHM_RIGHT_ASYMMETRIC 1
970 #define ALGORITHM_LEFT_SYMMETRIC 2
971 #define ALGORITHM_RIGHT_SYMMETRIC 3
973 /* Define non-rotating (raid4) algorithms. These allow
974 * conversion of raid4 to raid5.
976 #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */
977 #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */
979 /* DDF RAID6 layouts differ from md/raid6 layouts in two ways.
980 * Firstly, the exact positioning of the parity block is slightly
981 * different between the 'LEFT_*' modes of md and the "_N_*" modes
983 * Secondly, or order of datablocks over which the Q syndrome is computed
985 * Consequently we have different layouts for DDF/raid6 than md/raid6.
986 * These layouts are from the DDFv1.2 spec.
987 * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but
988 * leaves RLQ=3 as 'Vendor Specific'
991 #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */
992 #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */
993 #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */
996 /* For every RAID5 algorithm we define a RAID6 algorithm
997 * with exactly the same layout for data and parity, and
998 * with the Q block always on the last device (N-1).
999 * This allows trivial conversion from RAID5 to RAID6
1001 #define ALGORITHM_LEFT_ASYMMETRIC_6 16
1002 #define ALGORITHM_RIGHT_ASYMMETRIC_6 17
1003 #define ALGORITHM_LEFT_SYMMETRIC_6 18
1004 #define ALGORITHM_RIGHT_SYMMETRIC_6 19
1005 #define ALGORITHM_PARITY_0_6 20
1006 #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N