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
71 /* MAP_DIR should be somewhere that persists across the pivotroot
72 * from early boot to late boot.
73 * Currently /dev seems to be the only option on most distros.
76 #define MAP_DIR "/dev/.mdadm"
78 /* MAP_FILE is what we name the map file we put in MAP_DIR, in case you
79 * want something other than the default of "map"
82 #define MAP_FILE "map"
84 /* MDMON_DIR is where pid and socket files used for communicating
85 * with mdmon normally live. It *should* be /var/run, but when
86 * mdmon is needed at early boot then it needs to write there prior
87 * to /var/run being mounted read/write, and it also then needs to
88 * persist beyond when /var/run is mounter read-only. So, to be
89 * safe, the default is somewhere that is read/write early in the
90 * boot process and stays up as long as possible during shutdown.
93 #define MDMON_DIR "/dev/.mdadm/"
94 #endif /* MDMON_DIR */
102 /* Redhat don't like to #include <asm/byteorder.h>, and
103 * some time include <linux/byteorder/xxx_endian.h> isn't enough,
104 * and there is no standard conversion function so... */
105 /* And dietlibc doesn't think byteswap is ok, so.. */
106 /* #include <byteswap.h> */
107 #define bswap_16(x) (((x) & 0x00ffU) << 8 | \
108 ((x) & 0xff00U) >> 8)
109 #define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
110 ((x) & 0xff000000U) >> 24 | \
111 ((x) & 0x0000ff00U) << 8 | \
112 ((x) & 0x00ff0000U) >> 8)
113 #define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
114 ((x) & 0xff00000000000000ULL) >> 56 | \
115 ((x) & 0x000000000000ff00ULL) << 40 | \
116 ((x) & 0x00ff000000000000ULL) >> 40 | \
117 ((x) & 0x0000000000ff0000ULL) << 24 | \
118 ((x) & 0x0000ff0000000000ULL) >> 24 | \
119 ((x) & 0x00000000ff000000ULL) << 8 | \
120 ((x) & 0x000000ff00000000ULL) >> 8)
122 #if !defined(__KLIBC__)
123 #if BYTE_ORDER == LITTLE_ENDIAN
124 #define __cpu_to_le16(_x) (_x)
125 #define __cpu_to_le32(_x) (_x)
126 #define __cpu_to_le64(_x) (_x)
127 #define __le16_to_cpu(_x) (_x)
128 #define __le32_to_cpu(_x) (_x)
129 #define __le64_to_cpu(_x) (_x)
131 #define __cpu_to_be16(_x) bswap_16(_x)
132 #define __cpu_to_be32(_x) bswap_32(_x)
133 #define __cpu_to_be64(_x) bswap_64(_x)
134 #define __be16_to_cpu(_x) bswap_16(_x)
135 #define __be32_to_cpu(_x) bswap_32(_x)
136 #define __be64_to_cpu(_x) bswap_64(_x)
137 #elif BYTE_ORDER == BIG_ENDIAN
138 #define __cpu_to_le16(_x) bswap_16(_x)
139 #define __cpu_to_le32(_x) bswap_32(_x)
140 #define __cpu_to_le64(_x) bswap_64(_x)
141 #define __le16_to_cpu(_x) bswap_16(_x)
142 #define __le32_to_cpu(_x) bswap_32(_x)
143 #define __le64_to_cpu(_x) bswap_64(_x)
145 #define __cpu_to_be16(_x) (_x)
146 #define __cpu_to_be32(_x) (_x)
147 #define __cpu_to_be64(_x) (_x)
148 #define __be16_to_cpu(_x) (_x)
149 #define __be32_to_cpu(_x) (_x)
150 #define __be64_to_cpu(_x) (_x)
152 # error "unknown endianness."
154 #endif /* __KLIBC__ */
158 * min()/max()/clamp() macros that also do
159 * strict type-checking.. See the
160 * "unnecessary" pointer comparison.
162 #define min(x, y) ({ \
163 typeof(x) _min1 = (x); \
164 typeof(y) _min2 = (y); \
165 (void) (&_min1 == &_min2); \
166 _min1 < _min2 ? _min1 : _min2; })
168 #define max(x, y) ({ \
169 typeof(x) _max1 = (x); \
170 typeof(y) _max2 = (y); \
171 (void) (&_max1 == &_max2); \
172 _max1 > _max2 ? _max1 : _max2; })
174 /* general information that might be extracted from a superblock */
176 mdu_array_info_t array
;
177 mdu_disk_info_t disk
;
181 unsigned long long data_offset
;
182 unsigned long long component_size
; /* same as array.size, except in
183 * sectors and up to 64bits.
185 unsigned long long custom_array_size
; /* size for non-default sized
186 * arrays (in sectors)
189 unsigned long long reshape_progress
;
191 unsigned long long resync_start
; /* per-array resync position */
192 unsigned long long recovery_start
; /* per-device rebuild position */
193 #define MaxSector (~0ULL) /* resync/recovery complete position */
195 unsigned long safe_mode_delay
; /* ms delay to mark clean */
196 int new_level
, delta_disks
, new_layout
, new_chunk
;
198 unsigned long cache_size
; /* size of raid456 stripe cache*/
200 char text_version
[50];
201 void *update_private
; /* for passing metadata-format
202 * specific update data
203 * between successive calls to
207 int container_member
; /* for assembling external-metatdata arrays
208 * This is to be used internally by metadata
210 int container_enough
; /* flag external handlers can set to
211 * indicate that subarrays have not enough (-1),
212 * enough to start (0), or all expected disks (1) */
217 /* Device info for mdmon: */
222 #define DS_WRITE_MOSTLY 4
224 #define DS_BLOCKED 16
225 #define DS_REMOVE 1024
226 #define DS_UNBLOCK 2048
227 int prev_state
, curr_state
, next_state
;
237 struct supertype
*supertype
;
254 extern char short_options
[];
255 extern char short_bitmap_options
[];
256 extern char short_bitmap_auto_options
[];
257 extern struct option long_options
[];
258 extern char Version
[], Usage
[], Help
[], OptionHelp
[],
259 Help_create
[], Help_build
[], Help_assemble
[], Help_grow
[],
261 Help_manage
[], Help_misc
[], Help_monitor
[], Help_config
[];
263 /* for option that don't have short equivilents, we assign arbitrary
264 * small numbers. '1' means an undecorated option, so we start at '2'.
265 * (note we must stop before we get to 65 i.e. 'A')
267 enum special_options
{
282 UpdateSubarray
, /* 16 */
285 /* structures read from config file */
286 /* List of mddevice names and identifiers
287 * Identifiers can be:
289 * super-minor=decimal-minor-number-from-superblock
290 * devices=comma,separated,list,of,device,names,with,wildcards
292 * If multiple fields are present, the intersection of all matching
293 * devices is considered
295 #define UnSet (0xfffe)
296 typedef struct mddev_ident_s
{
305 char *devices
; /* comma separated list of device
306 * names with wild cards
311 struct supertype
*st
;
312 int autof
; /* 1 for normal, 2 for partitioned */
317 char *container
; /* /dev/whatever name of container, or
318 * uuid of container. You would expect
319 * this to be the 'devname' or UUID
320 * of some other entry.
322 char *member
; /* subarray within a container */
324 struct mddev_ident_s
*next
;
326 /* fields needed by different users of this structure */
327 int assembled
; /* set when assembly succeeds */
331 /* List of device names - wildcards expanded */
332 typedef struct mddev_dev_s
{
334 char disposition
; /* 'a' for add, 'r' for remove, 'f' for fail.
335 * Not set for names read from .config
337 char writemostly
; /* 1 for 'set writemostly', 2 for 'clear writemostly' */
339 char used
; /* set when used */
340 struct mdinfo
*content
; /* If devname is a container, this might list
341 * the remaining member arrays. */
342 struct mddev_dev_s
*next
;
345 typedef struct mapping
{
356 char *pattern
; /* U or up, _ for down */
357 int percent
; /* -1 if no resync */
358 int resync
; /* 1 if resync, 0 if recovery */
362 char * metadata_version
;
365 struct dev_member
*next
;
367 struct mdstat_ent
*next
;
370 extern struct mdstat_ent
*mdstat_read(int hold
, int start
);
371 extern void free_mdstat(struct mdstat_ent
*ms
);
372 extern void mdstat_wait(int seconds
);
373 extern void mdstat_wait_fd(int fd
, const sigset_t
*sigmask
);
374 extern int mddev_busy(int devnum
);
375 extern struct mdstat_ent
*mdstat_by_component(char *name
);
378 struct map_ent
*next
;
385 extern int map_update(struct map_ent
**mpp
, int devnum
, char *metadata
,
386 int uuid
[4], char *path
);
387 extern void map_remove(struct map_ent
**map
, int devnum
);
388 extern struct map_ent
*map_by_uuid(struct map_ent
**map
, int uuid
[4]);
389 extern struct map_ent
*map_by_devnum(struct map_ent
**map
, int devnum
);
390 extern struct map_ent
*map_by_name(struct map_ent
**map
, char *name
);
391 extern void map_read(struct map_ent
**melp
);
392 extern int map_write(struct map_ent
*mel
);
393 extern void map_delete(struct map_ent
**mapp
, int devnum
);
394 extern void map_free(struct map_ent
*map
);
395 extern void map_add(struct map_ent
**melp
,
396 int devnum
, char *metadata
, int uuid
[4], char *path
);
397 extern int map_lock(struct map_ent
**melp
);
398 extern void map_unlock(struct map_ent
**melp
);
400 /* various details can be requested */
401 enum sysfs_read_flags
{
402 GET_LEVEL
= (1 << 0),
403 GET_LAYOUT
= (1 << 1),
404 GET_COMPONENT
= (1 << 2),
405 GET_CHUNK
= (1 << 3),
406 GET_CACHE
= (1 << 4),
407 GET_MISMATCH
= (1 << 5),
408 GET_VERSION
= (1 << 6),
409 GET_DISKS
= (1 << 7),
410 GET_DEGRADED
= (1 << 8),
411 GET_SAFEMODE
= (1 << 9),
412 GET_DEVS
= (1 << 10), /* gets role, major, minor */
413 GET_OFFSET
= (1 << 11),
414 GET_SIZE
= (1 << 12),
415 GET_STATE
= (1 << 13),
416 GET_ERROR
= (1 << 14),
419 /* If fd >= 0, get the array it is open on,
420 * else use devnum. >=0 -> major9. <0.....
422 extern int sysfs_open(int devnum
, char *devname
, char *attr
);
423 extern void sysfs_init(struct mdinfo
*mdi
, int fd
, int devnum
);
424 extern void sysfs_free(struct mdinfo
*sra
);
425 extern struct mdinfo
*sysfs_read(int fd
, int devnum
, unsigned long options
);
426 extern int sysfs_attr_match(const char *attr
, const char *str
);
427 extern int sysfs_match_word(const char *word
, char **list
);
428 extern int sysfs_set_str(struct mdinfo
*sra
, struct mdinfo
*dev
,
429 char *name
, char *val
);
430 extern int sysfs_set_num(struct mdinfo
*sra
, struct mdinfo
*dev
,
431 char *name
, unsigned long long val
);
432 extern int sysfs_uevent(struct mdinfo
*sra
, char *event
);
433 extern int sysfs_get_fd(struct mdinfo
*sra
, struct mdinfo
*dev
,
435 extern int sysfs_fd_get_ll(int fd
, unsigned long long *val
);
436 extern int sysfs_get_ll(struct mdinfo
*sra
, struct mdinfo
*dev
,
437 char *name
, unsigned long long *val
);
438 extern int sysfs_fd_get_str(int fd
, char *val
, int size
);
439 extern int sysfs_get_str(struct mdinfo
*sra
, struct mdinfo
*dev
,
440 char *name
, char *val
, int size
);
441 extern int sysfs_set_safemode(struct mdinfo
*sra
, unsigned long ms
);
442 extern int sysfs_set_array(struct mdinfo
*info
, int vers
);
443 extern int sysfs_add_disk(struct mdinfo
*sra
, struct mdinfo
*sd
, int resume
);
444 extern int sysfs_disk_to_scsi_id(int fd
, __u32
*id
);
445 extern int sysfs_unique_holder(int devnum
, long rdev
);
446 extern int load_sys(char *path
, char *buf
);
449 extern int save_stripes(int *source
, unsigned long long *offsets
,
450 int raid_disks
, int chunk_size
, int level
, int layout
,
451 int nwrites
, int *dest
,
452 unsigned long long start
, unsigned long long length
,
454 extern int restore_stripes(int *dest
, unsigned long long *offsets
,
455 int raid_disks
, int chunk_size
, int level
, int layout
,
456 int source
, unsigned long long read_offset
,
457 unsigned long long start
, unsigned long long length
);
460 #define Sendmail "/usr/lib/sendmail -t"
463 #define SYSLOG_FACILITY LOG_DAEMON
465 extern char *map_num(mapping_t
*map
, int num
);
466 extern int map_name(mapping_t
*map
, char *name
);
467 extern mapping_t r5layout
[], r6layout
[], pers
[], modes
[], faultylayout
[];
469 extern char *map_dev(int major
, int minor
, int create
);
472 struct metadata_update
;
474 /* A superswitch provides entry point the a metadata handler.
476 * The super_switch primarily operates on some "metadata" that
477 * is accessed via the 'supertype'.
478 * This metadata has one of three possible sources.
479 * 1/ It is read from a single device. In this case it may not completely
480 * describe the array or arrays as some information might be on other
482 * 2/ It is read from all devices in a container. In this case all
483 * information is present.
484 * 3/ It is created by ->init_super / ->add_to_super. In this case it will
485 * be complete once enough ->add_to_super calls have completed.
487 * When creating an array inside a container, the metadata will be
488 * formed by a combination of 2 and 3. The metadata or the array is read,
489 * then new information is added.
491 * The metadata must sometimes have a concept of a 'current' array
492 * and a 'current' device.
493 * The 'current' array is set by init_super to be the newly created array,
494 * or is set by super_by_fd when it finds it is looking at an array inside
497 * The 'current' device is either the device that the metadata was read from
498 * in case 1, or the last device added by add_to_super in case 3.
499 * Case 2 does not identify a 'current' device.
501 extern struct superswitch
{
503 /* Used to report details of metadata read from a component
504 * device. ->load_super has been called.
506 void (*examine_super
)(struct supertype
*st
, char *homehost
);
507 void (*brief_examine_super
)(struct supertype
*st
, int verbose
);
508 void (*brief_examine_subarrays
)(struct supertype
*st
, int verbose
);
509 void (*export_examine_super
)(struct supertype
*st
);
511 /* Used to report details of an active array.
512 * ->load_super was possibly given a 'component' string.
514 void (*detail_super
)(struct supertype
*st
, char *homehost
);
515 void (*brief_detail_super
)(struct supertype
*st
);
516 void (*export_detail_super
)(struct supertype
*st
);
518 /* Optional: platform hardware / firmware details */
519 int (*detail_platform
)(int verbose
, int enumerate_only
);
522 * to get uuid to storing in bitmap metadata
523 * and 'reshape' backup-data metadata
524 * To see if a device is being re-added to an array it was part of.
526 void (*uuid_from_super
)(struct supertype
*st
, int uuid
[4]);
528 /* Extract generic details from metadata. This could be details about
529 * the container, or about an individual array within the container.
530 * The determination is made either by:
531 * load_super being given a 'component' string.
532 * validate_geometry determining what to create.
533 * The info includes both array information and device information.
534 * The particular device should be:
535 * The last device added by add_to_super
536 * The device the metadata was loaded from by load_super
538 void (*getinfo_super
)(struct supertype
*st
, struct mdinfo
*info
);
540 /* Check if the given metadata is flagged as belonging to "this"
541 * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost"
543 int (*match_home
)(struct supertype
*st
, char *homehost
);
545 /* Make one of several generic modifications to metadata
546 * prior to assembly (or other times).
547 * sparc2.2 - first bug in early 0.90 metadata
548 * super-minor - change name of 0.90 metadata
549 * summaries - 'correct' any redundant data
550 * resync - mark array as dirty to trigger a resync.
551 * uuid - set new uuid - only 0.90 or 1.x
552 * name - change the name of the array (where supported)
553 * homehost - change which host this array is tied to.
554 * devicesize - If metadata is at start of device, change recorded
555 * device size to match actual device size
556 * byteorder - swap bytes for 0.90 metadata
558 * force-one - mark that device as uptodate, not old or failed.
559 * force-array - mark array as clean if it would not otherwise
561 * assemble - not sure how this is different from force-one...
562 * linear-grow-new - add a new device to a linear array, but don't
563 * change the size: so superblock still matches
564 * linear-grow-update - now change the size of the array.
566 int (*update_super
)(struct supertype
*st
, struct mdinfo
*info
,
568 char *devname
, int verbose
,
569 int uuid_set
, char *homehost
);
571 /* Create new metadata for new array as described. This could
572 * be a new container, or an array in a pre-existing container.
573 * Also used to zero metadata prior to writing it to invalidate old
576 int (*init_super
)(struct supertype
*st
, mdu_array_info_t
*info
,
577 unsigned long long size
, char *name
,
578 char *homehost
, int *uuid
);
580 /* update the metadata to include new device, either at create or
581 * when hot-adding a spare.
583 int (*add_to_super
)(struct supertype
*st
, mdu_disk_info_t
*dinfo
,
584 int fd
, char *devname
);
586 /* Write metadata to one device when fixing problems or adding
589 int (*store_super
)(struct supertype
*st
, int fd
);
591 /* Write all metadata for this array.
593 int (*write_init_super
)(struct supertype
*st
);
594 int (*compare_super
)(struct supertype
*st
, struct supertype
*tst
);
595 int (*load_super
)(struct supertype
*st
, int fd
, char *devname
);
596 struct supertype
* (*match_metadata_desc
)(char *arg
);
597 __u64 (*avail_size
)(struct supertype
*st
, __u64 size
);
598 int (*add_internal_bitmap
)(struct supertype
*st
, int *chunkp
,
599 int delay
, int write_behind
,
600 unsigned long long size
, int may_change
, int major
);
601 void (*locate_bitmap
)(struct supertype
*st
, int fd
);
602 int (*write_bitmap
)(struct supertype
*st
, int fd
);
603 void (*free_super
)(struct supertype
*st
);
605 /* validate_geometry is called with an st returned by
606 * match_metadata_desc.
607 * It should check that the geometry described in compatible with
608 * the metadata type. It will be called repeatedly as devices
609 * added to validate changing size and new devices. If there are
610 * inter-device dependencies, it should record sufficient details
611 * so these can be validated.
612 * Both 'size' and '*freesize' are in sectors. chunk is bytes.
614 int (*validate_geometry
)(struct supertype
*st
, int level
, int layout
,
616 int chunk
, unsigned long long size
,
617 char *subdev
, unsigned long long *freesize
,
620 struct mdinfo
*(*container_content
)(struct supertype
*st
);
621 /* Allow a metadata handler to override mdadm's default layouts */
622 int (*default_layout
)(int level
); /* optional */
623 /* query the supertype for default chunk size */
624 int (*default_chunk
)(struct supertype
*st
); /* optional */
625 /* Permit subarray's to be deleted from inactive containers */
626 int (*kill_subarray
)(struct supertype
*st
); /* optional */
627 /* Permit subarray's to be modified */
628 int (*update_subarray
)(struct supertype
*st
, char *update
, mddev_ident_t ident
); /* optional */
631 int (*open_new
)(struct supertype
*c
, struct active_array
*a
,
634 /* Tell the metadata handler the current state of the array.
635 * This covers whether it is known to be consistent (no pending writes)
636 * and how far along a resync is known to have progressed
637 * (in a->resync_start).
638 * resync status is really irrelevant if the array is not consistent,
639 * but some metadata (DDF!) have a place to record the distinction.
640 * If 'consistent' is '2', then the array can mark it dirty if a
641 * resync/recovery/whatever is required, or leave it clean if not.
642 * Return value is 0 dirty (not consistent) and 1 if clean.
643 * it is only really important if consistent is passed in as '2'.
645 int (*set_array_state
)(struct active_array
*a
, int consistent
);
647 /* When the state of a device might have changed, we call set_disk to
648 * tell the metadata what the current state is.
649 * Typically this happens on spare->in_sync and (spare|in_sync)->faulty
651 * set_disk might be called when the state of the particular disk has
652 * not in fact changed.
654 void (*set_disk
)(struct active_array
*a
, int n
, int state
);
655 void (*sync_metadata
)(struct supertype
*st
);
656 void (*process_update
)(struct supertype
*st
,
657 struct metadata_update
*update
);
658 void (*prepare_update
)(struct supertype
*st
,
659 struct metadata_update
*update
);
661 /* activate_spare will check if the array is degraded and, if it
662 * is, try to find some spare space in the container.
663 * On success, it add appropriate updates (For process_update) to
664 * to the 'updates' list and returns a list of 'mdinfo' identifying
665 * the device, or devices as there might be multiple missing
666 * devices and multiple spares available.
668 struct mdinfo
*(*activate_spare
)(struct active_array
*a
,
669 struct metadata_update
**updates
);
671 int swapuuid
; /* true if uuid is bigending rather than hostendian */
673 const char *name
; /* canonical metadata name */
674 } super0
, super1
, super_ddf
, *superlist
[];
676 extern struct superswitch super_imsm
;
678 struct metadata_update
{
681 void *space
; /* allocated space that monitor will use */
682 struct metadata_update
*next
;
685 /* A supertype holds a particular collection of metadata.
686 * It identifies the metadata type by the superswitch, and the particular
687 * sub-version of that metadata type.
688 * metadata read in or created is stored in 'sb' and 'info'.
689 * There are also fields used by mdmon to track containers.
691 * A supertype may refer to:
692 * Just an array, possibly in a container
693 * A container, not identifying any particular array
694 * Info read from just one device, not yet fully describing the array/container.
697 * A supertype is created by:
703 struct superswitch
*ss
;
706 int container_dev
; /* devnum of container */
707 char subarray
[32]; /* name of array inside container */
710 int loaded_container
; /* Set if load_super found a container,
711 * not just one device */
713 struct metadata_update
*updates
;
714 struct metadata_update
**update_tail
;
716 /* extra stuff used by mdmon */
717 struct active_array
*arrays
;
718 int sock
; /* listen to external programs */
720 char *devname
; /* e.g. md0. This appears in metadata_verison:
729 extern struct supertype
*super_by_fd(int fd
);
730 extern struct supertype
*guess_super(int fd
);
731 extern struct supertype
*dup_super(struct supertype
*st
);
732 extern int get_dev_size(int fd
, char *dname
, unsigned long long *sizep
);
733 extern void get_one_disk(int mdfd
, mdu_array_info_t
*ainf
,
734 mdu_disk_info_t
*disk
);
735 void wait_for(char *dev
, int fd
);
741 #define HAVE_NFTW we assume
745 # include <features.h>
746 # ifndef __UCLIBC_HAS_LFS__
747 # define lseek64 lseek
749 # ifndef __UCLIBC_HAS_FTW__
759 #if defined(__KLIBC__)
775 extern int add_dev(const char *name
, const struct stat
*stb
, int flag
, struct FTW
*s
);
778 extern int Manage_ro(char *devname
, int fd
, int readonly
);
779 extern int Manage_runstop(char *devname
, int fd
, int runstop
, int quiet
);
780 extern int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
);
781 extern int Manage_subdevs(char *devname
, int fd
,
782 mddev_dev_t devlist
, int verbose
, int test
);
783 extern int autodetect(void);
784 extern int Grow_Add_device(char *devname
, int fd
, char *newdev
);
785 extern int Grow_addbitmap(char *devname
, int fd
, char *file
, int chunk
, int delay
, int write_behind
, int force
);
786 extern int Grow_reshape(char *devname
, int fd
, int quiet
, char *backup_file
,
788 int level
, char *layout_str
, int chunksize
, int raid_disks
);
789 extern int Grow_restart(struct supertype
*st
, struct mdinfo
*info
,
790 int *fdlist
, int cnt
, char *backup_file
, int verbose
);
791 extern int Grow_continue(int mdfd
, struct supertype
*st
,
792 struct mdinfo
*info
, char *backup_file
);
794 extern int Assemble(struct supertype
*st
, char *mddev
,
796 mddev_dev_t devlist
, char *backup_file
,
797 int readonly
, int runstop
,
798 char *update
, char *homehost
, int require_homehost
,
799 int verbose
, int force
);
801 extern int Build(char *mddev
, int chunk
, int level
, int layout
,
802 int raiddisks
, mddev_dev_t devlist
, int assume_clean
,
803 char *bitmap_file
, int bitmap_chunk
, int write_behind
,
804 int delay
, int verbose
, int autof
, unsigned long long size
);
807 extern int Create(struct supertype
*st
, char *mddev
,
808 int chunk
, int level
, int layout
, unsigned long long size
, int raiddisks
, int sparedisks
,
809 char *name
, char *homehost
, int *uuid
,
810 int subdevs
, mddev_dev_t devlist
,
811 int runstop
, int verbose
, int force
, int assume_clean
,
812 char *bitmap_file
, int bitmap_chunk
, int write_behind
, int delay
, int autof
);
814 extern int Detail(char *dev
, int brief
, int export
, int test
, char *homehost
);
815 extern int Detail_Platform(struct superswitch
*ss
, int scan
, int verbose
);
816 extern int Query(char *dev
);
817 extern int Examine(mddev_dev_t devlist
, int brief
, int export
, int scan
,
818 int SparcAdjust
, struct supertype
*forcest
, char *homehost
);
819 extern int Monitor(mddev_dev_t devlist
,
820 char *mailaddr
, char *alert_cmd
,
821 int period
, int daemonise
, int scan
, int oneshot
,
822 int dosyslog
, int test
, char *pidfile
, int increments
);
824 extern int Kill(char *dev
, struct supertype
*st
, int force
, int quiet
, int noexcl
);
825 extern int Kill_subarray(char *dev
, char *subarray
, int quiet
);
826 extern int Update_subarray(char *dev
, char *subarray
, char *update
, mddev_ident_t ident
, int quiet
);
827 extern int Wait(char *dev
);
828 extern int WaitClean(char *dev
, int sock
, int verbose
);
830 extern int Incremental(char *devname
, int verbose
, int runstop
,
831 struct supertype
*st
, char *homehost
, int require_homehost
,
833 extern int Incremental_container(struct supertype
*st
, char *devname
,
834 int verbose
, int runstop
, int autof
,
836 extern void RebuildMap(void);
837 extern int IncrementalScan(int verbose
);
838 extern int IncrementalRemove(char *devname
, int verbose
);
839 extern int CreateBitmap(char *filename
, int force
, char uuid
[16],
840 unsigned long chunksize
, unsigned long daemon_sleep
,
841 unsigned long write_behind
,
842 unsigned long long array_size
,
844 extern int ExamineBitmap(char *filename
, int brief
, struct supertype
*st
);
845 extern int bitmap_update_uuid(int fd
, int *uuid
, int swap
);
846 extern unsigned long bitmap_sectors(struct bitmap_super_s
*bsb
);
848 extern int md_get_version(int fd
);
849 extern int get_linux_version(void);
850 extern long long parse_size(char *size
);
851 extern int parse_uuid(char *str
, int uuid
[4]);
852 extern int parse_layout_10(char *layout
);
853 extern int parse_layout_faulty(char *layout
);
854 extern int check_ext2(int fd
, char *name
);
855 extern int check_reiser(int fd
, char *name
);
856 extern int check_raid(int fd
, char *name
);
857 extern int check_partitions(int fd
, char *dname
, unsigned long long freesize
);
859 extern int get_mdp_major(void);
860 extern int dev_open(char *dev
, int flags
);
861 extern int open_dev(int devnum
);
862 extern int open_dev_excl(int devnum
);
863 extern int is_standard(char *dev
, int *nump
);
864 extern int same_dev(char *one
, char *two
);
866 extern int parse_auto(char *str
, char *msg
, int config
);
867 extern mddev_ident_t
conf_get_ident(char *dev
);
868 extern mddev_dev_t
conf_get_devs(void);
869 extern int conf_test_dev(char *devname
);
870 extern int conf_test_metadata(const char *version
, int is_homehost
);
871 extern struct createinfo
*conf_get_create_info(void);
872 extern void set_conffile(char *file
);
873 extern char *conf_get_mailaddr(void);
874 extern char *conf_get_mailfrom(void);
875 extern char *conf_get_program(void);
876 extern char *conf_get_homehost(int *require_homehostp
);
877 extern char *conf_line(FILE *file
);
878 extern char *conf_word(FILE *file
, int allow_key
);
879 extern int conf_name_is_free(char *name
);
880 extern int devname_matches(char *name
, char *match
);
881 extern struct mddev_ident_s
*conf_match(struct mdinfo
*info
, struct supertype
*st
);
883 extern void free_line(char *line
);
884 extern int match_oneof(char *devices
, char *devname
);
885 extern void uuid_from_super(int uuid
[4], mdp_super_t
*super
);
886 extern const int uuid_match_any
[4];
887 extern int same_uuid(int a
[4], int b
[4], int swapuuid
);
888 extern void copy_uuid(void *a
, int b
[4], int swapuuid
);
889 extern char *__fname_from_uuid(int id
[4], int swap
, char *buf
, char sep
);
890 extern char *fname_from_uuid(struct supertype
*st
,
891 struct mdinfo
*info
, char *buf
, char sep
);
892 extern unsigned long calc_csum(void *super
, int bytes
);
893 extern int enough(int level
, int raid_disks
, int layout
, int clean
,
894 char *avail
, int avail_disks
);
895 extern int ask(char *mesg
);
896 extern unsigned long long get_component_size(int fd
);
897 extern void remove_partitions(int fd
);
898 extern int test_partition(int fd
);
899 extern unsigned long long calc_array_size(int level
, int raid_disks
, int layout
,
900 int chunksize
, unsigned long long devsize
);
901 extern int flush_metadata_updates(struct supertype
*st
);
902 extern void append_metadata_update(struct supertype
*st
, void *buf
, int len
);
903 extern int assemble_container_content(struct supertype
*st
, int mdfd
,
904 struct mdinfo
*content
, int runstop
,
905 char *chosen_name
, int verbose
);
907 extern int add_disk(int mdfd
, struct supertype
*st
,
908 struct mdinfo
*sra
, struct mdinfo
*info
);
909 extern int set_array_info(int mdfd
, struct supertype
*st
, struct mdinfo
*info
);
910 unsigned long long min_recovery_start(struct mdinfo
*array
);
912 extern char *human_size(long long bytes
);
913 extern char *human_size_brief(long long bytes
);
914 extern void print_r10_layout(int layout
);
916 #define NoMdDev (1<<23)
917 extern int find_free_devnum(int use_partitions
);
919 extern void put_md_name(char *name
);
920 extern char *get_md_name(int dev
);
922 extern char DefaultConfFile
[];
924 extern int create_mddev(char *dev
, char *name
, int autof
, int trustworthy
,
926 /* values for 'trustworthy' */
931 extern int open_mddev(char *dev
, int report_errors
);
932 extern int open_container(int fd
);
933 extern int is_container_member(struct mdstat_ent
*ent
, char *devname
);
934 extern int is_subarray_active(char *subarray
, char *devname
);
935 int is_container_active(char *devname
);
936 extern int open_subarray(char *dev
, struct supertype
*st
, int quiet
);
937 extern struct superswitch
*version_to_superswitch(char *vers
);
939 extern int mdmon_running(int devnum
);
940 extern int mdmon_pid(int devnum
);
941 extern int check_env(char *name
);
942 extern __u32
random32(void);
943 extern int start_mdmon(int devnum
);
945 extern char *devnum2devname(int num
);
946 extern int devname2devnum(char *name
);
947 extern int stat2devnum(struct stat
*st
);
948 extern int fd2devnum(int fd
);
950 static inline int dev2major(int d
)
955 return get_mdp_major();
958 static inline int dev2minor(int d
)
962 return (-1-d
) << MdpMinorShift
;
965 static inline int ROUND_UP(int a
, int base
)
967 return ((a
+base
-1)/base
)*base
;
970 static inline int is_subarray(char *vers
)
972 /* The version string for a 'subarray' (an array in a container)
974 * /containername/componentname for normal read-write arrays
975 * -containername/componentname for read-only arrays.
976 * containername is e.g. md0, md_d1
977 * componentname is dependant on the metadata. e.g. '1' 'S1' ...
979 return (*vers
== '/' || *vers
== '-');
983 #define dprintf(fmt, arg...) \
984 fprintf(stderr, fmt, ##arg)
986 #define dprintf(fmt, arg...) \
987 ({ if (0) fprintf(stderr, fmt, ##arg); 0; })
991 static inline int xasprintf(char **strp
, const char *fmt
, ...) {
995 ret
= vasprintf(strp
, fmt
, ap
);
1001 #define LEVEL_MULTIPATH (-4)
1002 #define LEVEL_LINEAR (-1)
1003 #define LEVEL_FAULTY (-5)
1005 /* kernel module doesn't know about these */
1006 #define LEVEL_CONTAINER (-100)
1007 #define LEVEL_UNSUPPORTED (-200)
1012 #define WriteTransient 0
1013 #define ReadTransient 1
1014 #define WritePersistent 2
1015 #define ReadPersistent 3
1016 #define WriteAll 4 /* doesn't go to device */
1017 #define ReadFixable 5
1020 #define ClearErrors 31
1021 #define ClearFaults 30
1023 #define AllPersist 100 /* internal use only */
1024 #define NoPersist 101
1026 #define ModeMask 0x1f
1034 #define minor(x) ((x)&0xff)
1035 #define major(x) (((x)>>8)&0xff)
1036 #define makedev(M,m) (((M)<<8) | (m))
1040 #define ALGORITHM_LEFT_ASYMMETRIC 0
1041 #define ALGORITHM_RIGHT_ASYMMETRIC 1
1042 #define ALGORITHM_LEFT_SYMMETRIC 2
1043 #define ALGORITHM_RIGHT_SYMMETRIC 3
1045 /* Define non-rotating (raid4) algorithms. These allow
1046 * conversion of raid4 to raid5.
1048 #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */
1049 #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */
1051 /* DDF RAID6 layouts differ from md/raid6 layouts in two ways.
1052 * Firstly, the exact positioning of the parity block is slightly
1053 * different between the 'LEFT_*' modes of md and the "_N_*" modes
1055 * Secondly, or order of datablocks over which the Q syndrome is computed
1057 * Consequently we have different layouts for DDF/raid6 than md/raid6.
1058 * These layouts are from the DDFv1.2 spec.
1059 * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but
1060 * leaves RLQ=3 as 'Vendor Specific'
1063 #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */
1064 #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */
1065 #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */
1068 /* For every RAID5 algorithm we define a RAID6 algorithm
1069 * with exactly the same layout for data and parity, and
1070 * with the Q block always on the last device (N-1).
1071 * This allows trivial conversion from RAID5 to RAID6
1073 #define ALGORITHM_LEFT_ASYMMETRIC_6 16
1074 #define ALGORITHM_RIGHT_ASYMMETRIC_6 17
1075 #define ALGORITHM_LEFT_SYMMETRIC_6 18
1076 #define ALGORITHM_RIGHT_SYMMETRIC_6 19
1077 #define ALGORITHM_PARITY_0_6 20
1078 #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N
1080 /* Define PATH_MAX in case we don't use glibc or standard library does
1081 * not have PATH_MAX defined. Assume max path length is 4K characters.
1084 #define PATH_MAX 4096