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 * min()/max()/clamp() macros that also do
134 * strict type-checking.. See the
135 * "unnecessary" pointer comparison.
137 #define min(x, y) ({ \
138 typeof(x) _min1 = (x); \
139 typeof(y) _min2 = (y); \
140 (void) (&_min1 == &_min2); \
141 _min1 < _min2 ? _min1 : _min2; })
143 #define max(x, y) ({ \
144 typeof(x) _max1 = (x); \
145 typeof(y) _max2 = (y); \
146 (void) (&_max1 == &_max2); \
147 _max1 > _max2 ? _max1 : _max2; })
149 /* general information that might be extracted from a superblock */
151 mdu_array_info_t array
;
152 mdu_disk_info_t disk
;
156 unsigned long long data_offset
;
157 unsigned long long component_size
; /* same as array.size, except in
158 * sectors and up to 64bits.
160 unsigned long long custom_array_size
; /* size for non-default sized
161 * arrays (in sectors)
164 unsigned long long reshape_progress
;
166 unsigned long long resync_start
; /* per-array resync position */
167 unsigned long long recovery_start
; /* per-device rebuild position */
168 #define MaxSector (~0ULL) /* resync/recovery complete position */
170 unsigned long safe_mode_delay
; /* ms delay to mark clean */
171 int new_level
, delta_disks
, new_layout
, new_chunk
;
173 int cache_size
; /* size of raid456 stripe cache*/
175 char text_version
[50];
176 void *update_private
; /* for passing metadata-format
177 * specific update data
178 * between successive calls to
182 int container_member
; /* for assembling external-metatdata arrays
183 * This is to be used internally by metadata
190 /* Device info for mdmon: */
195 #define DS_WRITE_MOSTLY 4
197 #define DS_BLOCKED 16
198 #define DS_REMOVE 1024
199 #define DS_UNBLOCK 2048
200 int prev_state
, curr_state
, next_state
;
210 struct supertype
*supertype
;
227 extern char short_options
[];
228 extern char short_bitmap_options
[];
229 extern char short_bitmap_auto_options
[];
230 extern struct option long_options
[];
231 extern char Version
[], Usage
[], Help
[], OptionHelp
[],
232 Help_create
[], Help_build
[], Help_assemble
[], Help_grow
[],
234 Help_manage
[], Help_misc
[], Help_monitor
[], Help_config
[];
236 /* for option that don't have short equivilents, we assign arbitrary
237 * small numbers. '1' means an undecorated option, so we start at '2'.
239 enum special_options
{
255 /* structures read from config file */
256 /* List of mddevice names and identifiers
257 * Identifiers can be:
259 * super-minor=decimal-minor-number-from-superblock
260 * devices=comma,separated,list,of,device,names,with,wildcards
262 * If multiple fields are present, the intersection of all matching
263 * devices is considered
265 #define UnSet (0xfffe)
266 typedef struct mddev_ident_s
{
273 unsigned int super_minor
;
275 char *devices
; /* comma separated list of device
276 * names with wild cards
279 unsigned int raid_disks
;
280 unsigned int spare_disks
;
281 struct supertype
*st
;
282 int autof
; /* 1 for normal, 2 for partitioned */
287 char *container
; /* /dev/whatever name of container, or
288 * uuid of container. You would expect
289 * this to be the 'devname' or UUID
290 * of some other entry.
292 char *member
; /* subarray within a container */
294 struct mddev_ident_s
*next
;
297 /* List of device names - wildcards expanded */
298 typedef struct mddev_dev_s
{
300 char disposition
; /* 'a' for add, 'r' for remove, 'f' for fail.
301 * Not set for names read from .config
303 char writemostly
; /* 1 for 'set writemostly', 2 for 'clear writemostly' */
305 char used
; /* set when used */
306 struct mdinfo
*content
; /* If devname is a container, this might list
307 * the remaining member arrays. */
308 struct mddev_dev_s
*next
;
311 typedef struct mapping
{
322 char *pattern
; /* U or up, _ for down */
323 int percent
; /* -1 if no resync */
324 int resync
; /* 1 if resync, 0 if recovery */
328 char * metadata_version
;
329 struct mdstat_ent
*next
;
332 extern struct mdstat_ent
*mdstat_read(int hold
, int start
);
333 extern void free_mdstat(struct mdstat_ent
*ms
);
334 extern void mdstat_wait(int seconds
);
335 extern void mdstat_wait_fd(int fd
, const sigset_t
*sigmask
);
336 extern int mddev_busy(int devnum
);
339 struct map_ent
*next
;
346 extern int map_update(struct map_ent
**mpp
, int devnum
, char *metadata
,
347 int uuid
[4], char *path
);
348 extern struct map_ent
*map_by_uuid(struct map_ent
**map
, int uuid
[4]);
349 extern struct map_ent
*map_by_devnum(struct map_ent
**map
, int devnum
);
350 extern struct map_ent
*map_by_name(struct map_ent
**map
, char *name
);
351 extern void map_read(struct map_ent
**melp
);
352 extern int map_write(struct map_ent
*mel
);
353 extern void map_delete(struct map_ent
**mapp
, int devnum
);
354 extern void map_free(struct map_ent
*map
);
355 extern void map_add(struct map_ent
**melp
,
356 int devnum
, char *metadata
, int uuid
[4], char *path
);
357 extern int map_lock(struct map_ent
**melp
);
358 extern void map_unlock(struct map_ent
**melp
);
360 /* various details can be requested */
361 enum sysfs_read_flags
{
362 GET_LEVEL
= (1 << 0),
363 GET_LAYOUT
= (1 << 1),
364 GET_COMPONENT
= (1 << 2),
365 GET_CHUNK
= (1 << 3),
366 GET_CACHE
= (1 << 4),
367 GET_MISMATCH
= (1 << 5),
368 GET_VERSION
= (1 << 6),
369 GET_DISKS
= (1 << 7),
370 GET_DEGRADED
= (1 << 8),
371 GET_SAFEMODE
= (1 << 9),
372 GET_DEVS
= (1 << 10), /* gets role, major, minor */
373 GET_OFFSET
= (1 << 11),
374 GET_SIZE
= (1 << 12),
375 GET_STATE
= (1 << 13),
376 GET_ERROR
= (1 << 14),
377 SKIP_GONE_DEVS
= (1 << 15),
380 /* If fd >= 0, get the array it is open on,
381 * else use devnum. >=0 -> major9. <0.....
383 extern int sysfs_open(int devnum
, char *devname
, char *attr
);
384 extern void sysfs_init(struct mdinfo
*mdi
, int fd
, int devnum
);
385 extern void sysfs_free(struct mdinfo
*sra
);
386 extern struct mdinfo
*sysfs_read(int fd
, int devnum
, unsigned long options
);
387 extern int sysfs_attr_match(const char *attr
, const char *str
);
388 extern int sysfs_match_word(const char *word
, char **list
);
389 extern int sysfs_set_str(struct mdinfo
*sra
, struct mdinfo
*dev
,
390 char *name
, char *val
);
391 extern int sysfs_set_num(struct mdinfo
*sra
, struct mdinfo
*dev
,
392 char *name
, unsigned long long val
);
393 extern int sysfs_uevent(struct mdinfo
*sra
, char *event
);
394 extern int sysfs_get_fd(struct mdinfo
*sra
, struct mdinfo
*dev
,
396 extern int sysfs_fd_get_ll(int fd
, unsigned long long *val
);
397 extern int sysfs_get_ll(struct mdinfo
*sra
, struct mdinfo
*dev
,
398 char *name
, unsigned long long *val
);
399 extern int sysfs_fd_get_str(int fd
, char *val
, int size
);
400 extern int sysfs_get_str(struct mdinfo
*sra
, struct mdinfo
*dev
,
401 char *name
, char *val
, int size
);
402 extern int sysfs_set_safemode(struct mdinfo
*sra
, unsigned long ms
);
403 extern int sysfs_set_array(struct mdinfo
*info
, int vers
);
404 extern int sysfs_add_disk(struct mdinfo
*sra
, struct mdinfo
*sd
, int resume
);
405 extern int sysfs_disk_to_scsi_id(int fd
, __u32
*id
);
406 extern int sysfs_unique_holder(int devnum
, long rdev
);
407 extern int load_sys(char *path
, char *buf
);
410 extern int save_stripes(int *source
, unsigned long long *offsets
,
411 int raid_disks
, int chunk_size
, int level
, int layout
,
412 int nwrites
, int *dest
,
413 unsigned long long start
, unsigned long long length
,
415 extern int restore_stripes(int *dest
, unsigned long long *offsets
,
416 int raid_disks
, int chunk_size
, int level
, int layout
,
417 int source
, unsigned long long read_offset
,
418 unsigned long long start
, unsigned long long length
);
421 #define Sendmail "/usr/lib/sendmail -t"
424 #define SYSLOG_FACILITY LOG_DAEMON
426 extern char *map_num(mapping_t
*map
, int num
);
427 extern int map_name(mapping_t
*map
, char *name
);
428 extern mapping_t r5layout
[], r6layout
[], pers
[], modes
[], faultylayout
[];
430 extern char *map_dev(int major
, int minor
, int create
);
433 struct metadata_update
;
435 /* A superswitch provides entry point the a metadata handler.
437 * The super_switch primarily operates on some "metadata" that
438 * is accessed via the 'supertype'.
439 * This metadata has one of three possible sources.
440 * 1/ It is read from a single device. In this case it may not completely
441 * describe the array or arrays as some information might be on other
443 * 2/ It is read from all devices in a container. In this case all
444 * information is present.
445 * 3/ It is created by ->init_super / ->add_to_super. In this case it will
446 * be complete once enough ->add_to_super calls have completed.
448 * When creating an array inside a container, the metadata will be
449 * formed by a combination of 2 and 3. The metadata or the array is read,
450 * then new information is added.
452 * The metadata must sometimes have a concept of a 'current' array
453 * and a 'current' device.
454 * The 'current' array is set by init_super to be the newly created array,
455 * or is set by super_by_fd when it finds it is looking at an array inside
458 * The 'current' device is either the device that the metadata was read from
459 * in case 1, or the last device added by add_to_super in case 3.
460 * Case 2 does not identify a 'current' device.
462 extern struct superswitch
{
464 /* Used to report details of metadata read from a component
465 * device. ->load_super has been called.
467 void (*examine_super
)(struct supertype
*st
, char *homehost
);
468 void (*brief_examine_super
)(struct supertype
*st
, int verbose
);
469 void (*brief_examine_subarrays
)(struct supertype
*st
, int verbose
);
470 void (*export_examine_super
)(struct supertype
*st
);
472 /* Used to report details of an active array.
473 * ->load_super was possibly given a 'component' string.
475 void (*detail_super
)(struct supertype
*st
, char *homehost
);
476 void (*brief_detail_super
)(struct supertype
*st
);
477 void (*export_detail_super
)(struct supertype
*st
);
479 /* Optional: platform hardware / firmware details */
480 int (*detail_platform
)(int verbose
, int enumerate_only
);
483 * to get uuid to storing in bitmap metadata
484 * and 'reshape' backup-data metadata
485 * To see if a device is being re-added to an array it was part of.
487 void (*uuid_from_super
)(struct supertype
*st
, int uuid
[4]);
489 /* Extract generic details from metadata. This could be details about
490 * the container, or about an individual array within the container.
491 * The determination is made either by:
492 * load_super being given a 'component' string.
493 * validate_geometry determining what to create.
494 * The info includes both array information and device information.
495 * The particular device should be:
496 * The last device added by add_to_super
497 * The device the metadata was loaded from by load_super
499 void (*getinfo_super
)(struct supertype
*st
, struct mdinfo
*info
);
501 /* Check if the given metadata is flagged as belonging to "this"
502 * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost"
504 int (*match_home
)(struct supertype
*st
, char *homehost
);
506 /* Make one of several generic modifications to metadata
507 * prior to assembly (or other times).
508 * sparc2.2 - first bug in early 0.90 metadata
509 * super-minor - change name of 0.90 metadata
510 * summaries - 'correct' any redundant data
511 * resync - mark array as dirty to trigger a resync.
512 * uuid - set new uuid - only 0.90 or 1.x
513 * name - change the name of the array (where supported)
514 * homehost - change which host this array is tied to.
515 * devicesize - If metadata is at start of device, change recorded
516 * device size to match actual device size
517 * byteorder - swap bytes for 0.90 metadata
519 * force-one - mark that device as uptodate, not old or failed.
520 * force-array - mark array as clean if it would not otherwise
522 * assemble - not sure how this is different from force-one...
523 * linear-grow-new - add a new device to a linear array, but don't
524 * change the size: so superblock still matches
525 * linear-grow-update - now change the size of the array.
527 int (*update_super
)(struct supertype
*st
, struct mdinfo
*info
,
529 char *devname
, int verbose
,
530 int uuid_set
, char *homehost
);
532 /* Create new metadata for new array as described. This could
533 * be a new container, or an array in a pre-existing container.
534 * Also used to zero metadata prior to writing it to invalidate old
537 int (*init_super
)(struct supertype
*st
, mdu_array_info_t
*info
,
538 unsigned long long size
, char *name
,
539 char *homehost
, int *uuid
);
541 /* update the metadata to include new device, either at create or
542 * when hot-adding a spare.
544 int (*add_to_super
)(struct supertype
*st
, mdu_disk_info_t
*dinfo
,
545 int fd
, char *devname
);
547 /* Write metadata to one device when fixing problems or adding
550 int (*store_super
)(struct supertype
*st
, int fd
);
552 /* Write all metadata for this array.
554 int (*write_init_super
)(struct supertype
*st
);
555 int (*compare_super
)(struct supertype
*st
, struct supertype
*tst
);
556 int (*load_super
)(struct supertype
*st
, int fd
, char *devname
);
557 struct supertype
* (*match_metadata_desc
)(char *arg
);
558 __u64 (*avail_size
)(struct supertype
*st
, __u64 size
);
559 int (*add_internal_bitmap
)(struct supertype
*st
, int *chunkp
,
560 int delay
, int write_behind
,
561 unsigned long long size
, int may_change
, int major
);
562 void (*locate_bitmap
)(struct supertype
*st
, int fd
);
563 int (*write_bitmap
)(struct supertype
*st
, int fd
);
564 void (*free_super
)(struct supertype
*st
);
566 /* validate_geometry is called with an st returned by
567 * match_metadata_desc.
568 * It should check that the geometry described in compatible with
569 * the metadata type. It will be called repeatedly as devices
570 * added to validate changing size and new devices. If there are
571 * inter-device dependencies, it should record sufficient details
572 * so these can be validated.
573 * Both 'size' and '*freesize' are in sectors. chunk is bytes.
575 int (*validate_geometry
)(struct supertype
*st
, int level
, int layout
,
577 int chunk
, unsigned long long size
,
578 char *subdev
, unsigned long long *freesize
,
581 struct mdinfo
*(*container_content
)(struct supertype
*st
);
582 /* Allow a metadata handler to override mdadm's default layouts */
583 int (*default_layout
)(int level
); /* optional */
586 int (*open_new
)(struct supertype
*c
, struct active_array
*a
,
589 /* Tell the metadata handler the current state of the array.
590 * This covers whether it is known to be consistent (no pending writes)
591 * and how far along a resync is known to have progressed
592 * (in a->resync_start).
593 * resync status is really irrelevant if the array is not consistent,
594 * but some metadata (DDF!) have a place to record the distinction.
595 * If 'consistent' is '2', then the array can mark it dirty if a
596 * resync/recovery/whatever is required, or leave it clean if not.
597 * Return value is 0 dirty (not consistent) and 1 if clean.
598 * it is only really important if consistent is passed in as '2'.
600 int (*set_array_state
)(struct active_array
*a
, int consistent
);
602 /* When the state of a device might have changed, we call set_disk to
603 * tell the metadata what the current state is.
604 * Typically this happens on spare->in_sync and (spare|in_sync)->faulty
606 * set_disk might be called when the state of the particular disk has
607 * not in fact changed.
609 void (*set_disk
)(struct active_array
*a
, int n
, int state
);
610 void (*sync_metadata
)(struct supertype
*st
);
611 void (*process_update
)(struct supertype
*st
,
612 struct metadata_update
*update
);
613 void (*prepare_update
)(struct supertype
*st
,
614 struct metadata_update
*update
);
616 /* activate_spare will check if the array is degraded and, if it
617 * is, try to find some spare space in the container.
618 * On success, it add appropriate updates (For process_update) to
619 * to the 'updates' list and returns a list of 'mdinfo' identifying
620 * the device, or devices as there might be multiple missing
621 * devices and multiple spares available.
623 struct mdinfo
*(*activate_spare
)(struct active_array
*a
,
624 struct metadata_update
**updates
);
626 int swapuuid
; /* true if uuid is bigending rather than hostendian */
628 const char *name
; /* canonical metadata name */
629 } super0
, super1
, super_ddf
, *superlist
[];
631 extern struct superswitch super_imsm
;
633 struct metadata_update
{
636 void *space
; /* allocated space that monitor will use */
637 struct metadata_update
*next
;
640 /* A supertype holds a particular collection of metadata.
641 * It identifies the metadata type by the superswitch, and the particular
642 * sub-version of that metadata type.
643 * metadata read in or created is stored in 'sb' and 'info'.
644 * There are also fields used by mdmon to track containers.
646 * A supertype may refer to:
647 * Just an array, possibly in a container
648 * A container, not identifying any particular array
649 * Info read from just one device, not yet fully describing the array/container.
652 * A supertype is created by:
658 struct superswitch
*ss
;
661 int container_dev
; /* devnum of container */
662 char subarray
[32]; /* name of array inside container */
665 int loaded_container
; /* Set if load_super found a container,
666 * not just one device */
668 struct metadata_update
*updates
;
669 struct metadata_update
**update_tail
;
671 /* extra stuff used by mdmon */
672 struct active_array
*arrays
;
673 int sock
; /* listen to external programs */
675 char *devname
; /* e.g. md0. This appears in metadata_verison:
684 extern struct supertype
*super_by_fd(int fd
);
685 extern struct supertype
*guess_super(int fd
);
686 extern struct supertype
*dup_super(struct supertype
*st
);
687 extern int get_dev_size(int fd
, char *dname
, unsigned long long *sizep
);
688 extern void get_one_disk(int mdfd
, mdu_array_info_t
*ainf
,
689 mdu_disk_info_t
*disk
);
690 void wait_for(char *dev
, int fd
);
696 #define HAVE_NFTW we assume
700 # include <features.h>
701 # ifndef __UCLIBC_HAS_LFS__
702 # define lseek64 lseek
704 # ifndef __UCLIBC_HAS_FTW__
714 #if defined(__KLIBC__)
730 extern int add_dev(const char *name
, const struct stat
*stb
, int flag
, struct FTW
*s
);
733 extern int Manage_ro(char *devname
, int fd
, int readonly
);
734 extern int Manage_runstop(char *devname
, int fd
, int runstop
, int quiet
);
735 extern int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
);
736 extern int Manage_subdevs(char *devname
, int fd
,
737 mddev_dev_t devlist
, int verbose
);
738 extern int autodetect(void);
739 extern int Grow_Add_device(char *devname
, int fd
, char *newdev
);
740 extern int Grow_addbitmap(char *devname
, int fd
, char *file
, int chunk
, int delay
, int write_behind
, int force
);
741 extern int Grow_reshape(char *devname
, int fd
, int quiet
, char *backup_file
,
743 int level
, char *layout_str
, int chunksize
, int raid_disks
);
744 extern int Grow_restart(struct supertype
*st
, struct mdinfo
*info
,
745 int *fdlist
, int cnt
, char *backup_file
, int verbose
);
746 extern int Grow_continue(int mdfd
, struct supertype
*st
,
747 struct mdinfo
*info
, char *backup_file
);
749 extern int Assemble(struct supertype
*st
, char *mddev
,
751 mddev_dev_t devlist
, char *backup_file
,
752 int readonly
, int runstop
,
753 char *update
, char *homehost
, int require_homehost
,
754 int verbose
, int force
);
756 extern int Build(char *mddev
, int chunk
, int level
, int layout
,
757 int raiddisks
, mddev_dev_t devlist
, int assume_clean
,
758 char *bitmap_file
, int bitmap_chunk
, int write_behind
,
759 int delay
, int verbose
, int autof
, unsigned long long size
);
762 extern int Create(struct supertype
*st
, char *mddev
,
763 int chunk
, int level
, int layout
, unsigned long long size
, int raiddisks
, int sparedisks
,
764 char *name
, char *homehost
, int *uuid
,
765 int subdevs
, mddev_dev_t devlist
,
766 int runstop
, int verbose
, int force
, int assume_clean
,
767 char *bitmap_file
, int bitmap_chunk
, int write_behind
, int delay
, int autof
);
769 extern int Detail(char *dev
, int brief
, int export
, int test
, char *homehost
);
770 extern int Detail_Platform(struct superswitch
*ss
, int scan
, int verbose
);
771 extern int Query(char *dev
);
772 extern int Examine(mddev_dev_t devlist
, int brief
, int export
, int scan
,
773 int SparcAdjust
, struct supertype
*forcest
, char *homehost
);
774 extern int Monitor(mddev_dev_t devlist
,
775 char *mailaddr
, char *alert_cmd
,
776 int period
, int daemonise
, int scan
, int oneshot
,
777 int dosyslog
, int test
, char *pidfile
, int increments
);
779 extern int Kill(char *dev
, struct supertype
*st
, int force
, int quiet
, int noexcl
);
780 extern int Wait(char *dev
);
781 extern int WaitClean(char *dev
, int sock
, int verbose
);
783 extern int Incremental(char *devname
, int verbose
, int runstop
,
784 struct supertype
*st
, char *homehost
, int require_homehost
,
786 extern int Incremental_container(struct supertype
*st
, char *devname
,
787 int verbose
, int runstop
, int autof
,
789 extern void RebuildMap(void);
790 extern int IncrementalScan(int verbose
);
792 extern int CreateBitmap(char *filename
, int force
, char uuid
[16],
793 unsigned long chunksize
, unsigned long daemon_sleep
,
794 unsigned long write_behind
,
795 unsigned long long array_size
,
797 extern int ExamineBitmap(char *filename
, int brief
, struct supertype
*st
);
798 extern int bitmap_update_uuid(int fd
, int *uuid
, int swap
);
799 extern unsigned long bitmap_sectors(struct bitmap_super_s
*bsb
);
801 extern int md_get_version(int fd
);
802 extern int get_linux_version(void);
803 extern long long parse_size(char *size
);
804 extern int parse_uuid(char *str
, int uuid
[4]);
805 extern int parse_layout_10(char *layout
);
806 extern int parse_layout_faulty(char *layout
);
807 extern int check_ext2(int fd
, char *name
);
808 extern int check_reiser(int fd
, char *name
);
809 extern int check_raid(int fd
, char *name
);
810 extern int check_partitions(int fd
, char *dname
, unsigned long long freesize
);
812 extern int get_mdp_major(void);
813 extern int dev_open(char *dev
, int flags
);
814 extern int open_dev(int devnum
);
815 extern int open_dev_excl(int devnum
);
816 extern int is_standard(char *dev
, int *nump
);
817 extern int same_dev(char *one
, char *two
);
819 extern int parse_auto(char *str
, char *msg
, int config
);
820 extern mddev_ident_t
conf_get_ident(char *dev
);
821 extern mddev_dev_t
conf_get_devs(void);
822 extern int conf_test_dev(char *devname
);
823 extern int conf_test_metadata(const char *version
);
824 extern struct createinfo
*conf_get_create_info(void);
825 extern void set_conffile(char *file
);
826 extern char *conf_get_mailaddr(void);
827 extern char *conf_get_mailfrom(void);
828 extern char *conf_get_program(void);
829 extern char *conf_get_homehost(int *require_homehostp
);
830 extern char *conf_line(FILE *file
);
831 extern char *conf_word(FILE *file
, int allow_key
);
832 extern int conf_name_is_free(char *name
);
833 extern int devname_matches(char *name
, char *match
);
834 extern struct mddev_ident_s
*conf_match(struct mdinfo
*info
, struct supertype
*st
);
836 extern void free_line(char *line
);
837 extern int match_oneof(char *devices
, char *devname
);
838 extern void uuid_from_super(int uuid
[4], mdp_super_t
*super
);
839 extern const int uuid_match_any
[4];
840 extern int same_uuid(int a
[4], int b
[4], int swapuuid
);
841 extern void copy_uuid(void *a
, int b
[4], int swapuuid
);
842 extern char *__fname_from_uuid(int id
[4], int swap
, char *buf
, char sep
);
843 extern char *fname_from_uuid(struct supertype
*st
,
844 struct mdinfo
*info
, char *buf
, char sep
);
845 extern unsigned long calc_csum(void *super
, int bytes
);
846 extern int enough(int level
, int raid_disks
, int layout
, int clean
,
847 char *avail
, int avail_disks
);
848 extern int ask(char *mesg
);
849 extern unsigned long long get_component_size(int fd
);
850 extern void remove_partitions(int fd
);
851 extern unsigned long long calc_array_size(int level
, int raid_disks
, int layout
,
852 int chunksize
, unsigned long long devsize
);
853 extern int flush_metadata_updates(struct supertype
*st
);
854 extern void append_metadata_update(struct supertype
*st
, void *buf
, int len
);
855 extern int assemble_container_content(struct supertype
*st
, int mdfd
,
856 struct mdinfo
*content
, int runstop
,
857 char *chosen_name
, int verbose
);
859 extern int add_disk(int mdfd
, struct supertype
*st
,
860 struct mdinfo
*sra
, struct mdinfo
*info
);
861 extern int set_array_info(int mdfd
, struct supertype
*st
, struct mdinfo
*info
);
862 unsigned long long min_recovery_start(struct mdinfo
*array
);
864 extern char *human_size(long long bytes
);
865 extern char *human_size_brief(long long bytes
);
866 extern void print_r10_layout(int layout
);
868 #define NoMdDev (1<<23)
869 extern int find_free_devnum(int use_partitions
);
871 extern void put_md_name(char *name
);
872 extern char *get_md_name(int dev
);
874 extern char DefaultConfFile
[];
876 extern int create_mddev(char *dev
, char *name
, int autof
, int trustworthy
,
878 /* values for 'trustworthy' */
882 extern int open_mddev(char *dev
, int report_errors
);
883 extern int open_container(int fd
);
885 extern int mdmon_running(int devnum
);
886 extern int signal_mdmon(int devnum
);
887 extern int check_env(char *name
);
888 extern __u32
random32(void);
889 extern int start_mdmon(int devnum
);
891 extern char *devnum2devname(int num
);
892 extern int devname2devnum(char *name
);
893 extern int stat2devnum(struct stat
*st
);
894 extern int fd2devnum(int fd
);
896 static inline int dev2major(int d
)
901 return get_mdp_major();
904 static inline int dev2minor(int d
)
908 return (-1-d
) << MdpMinorShift
;
911 static inline int ROUND_UP(int a
, int base
)
913 return ((a
+base
-1)/base
)*base
;
916 static inline int is_subarray(char *vers
)
918 /* The version string for a 'subarray' (an array in a container)
920 * /containername/componentname for normal read-write arrays
921 * -containername/componentname for read-only arrays.
922 * containername is e.g. md0, md_d1
923 * componentname is dependant on the metadata. e.g. '1' 'S1' ...
925 return (*vers
== '/' || *vers
== '-');
929 #define dprintf(fmt, arg...) \
930 fprintf(stderr, fmt, ##arg)
932 #define dprintf(fmt, arg...) \
933 ({ if (0) fprintf(stderr, fmt, ##arg); 0; })
937 static inline int xasprintf(char **strp
, const char *fmt
, ...) {
941 ret
= vasprintf(strp
, fmt
, ap
);
947 #define LEVEL_MULTIPATH (-4)
948 #define LEVEL_LINEAR (-1)
949 #define LEVEL_FAULTY (-5)
951 /* kernel module doesn't know about these */
952 #define LEVEL_CONTAINER (-100)
953 #define LEVEL_UNSUPPORTED (-200)
958 #define WriteTransient 0
959 #define ReadTransient 1
960 #define WritePersistent 2
961 #define ReadPersistent 3
962 #define WriteAll 4 /* doesn't go to device */
963 #define ReadFixable 5
966 #define ClearErrors 31
967 #define ClearFaults 30
969 #define AllPersist 100 /* internal use only */
970 #define NoPersist 101
972 #define ModeMask 0x1f
980 #define minor(x) ((x)&0xff)
981 #define major(x) (((x)>>8)&0xff)
982 #define makedev(M,m) (((M)<<8) | (m))
986 #define ALGORITHM_LEFT_ASYMMETRIC 0
987 #define ALGORITHM_RIGHT_ASYMMETRIC 1
988 #define ALGORITHM_LEFT_SYMMETRIC 2
989 #define ALGORITHM_RIGHT_SYMMETRIC 3
991 /* Define non-rotating (raid4) algorithms. These allow
992 * conversion of raid4 to raid5.
994 #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */
995 #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */
997 /* DDF RAID6 layouts differ from md/raid6 layouts in two ways.
998 * Firstly, the exact positioning of the parity block is slightly
999 * different between the 'LEFT_*' modes of md and the "_N_*" modes
1001 * Secondly, or order of datablocks over which the Q syndrome is computed
1003 * Consequently we have different layouts for DDF/raid6 than md/raid6.
1004 * These layouts are from the DDFv1.2 spec.
1005 * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but
1006 * leaves RLQ=3 as 'Vendor Specific'
1009 #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */
1010 #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */
1011 #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */
1014 /* For every RAID5 algorithm we define a RAID6 algorithm
1015 * with exactly the same layout for data and parity, and
1016 * with the Q block always on the last device (N-1).
1017 * This allows trivial conversion from RAID5 to RAID6
1019 #define ALGORITHM_LEFT_ASYMMETRIC_6 16
1020 #define ALGORITHM_RIGHT_ASYMMETRIC_6 17
1021 #define ALGORITHM_LEFT_SYMMETRIC_6 18
1022 #define ALGORITHM_RIGHT_SYMMETRIC_6 19
1023 #define ALGORITHM_PARITY_0_6 20
1024 #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N