2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
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@cse.unsw.edu.au>
24 * School of Computer Science and Engineering
25 * The University of New South Wales
33 extern __off64_t lseek64
__P ((int __fd
, __off64_t __offset
, int __whence
));
36 #include <sys/types.h>
47 #ifdef __dietlibc__NONO
48 int strncmp(const char *s1
, const char *s2
, size_t n
) __THROW __pure__
;
49 char *strncpy(char *dest
, const char *src
, size_t n
) __THROW
;
54 #include <linux/kdev_t.h>
55 /*#include <linux/fs.h> */
56 #include <sys/mount.h>
57 #include <asm/types.h>
58 #include <sys/ioctl.h>
60 #define MdpMinorShift 6
63 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
66 #define DEFAULT_BITMAP_CHUNK 4096
67 #define DEFAULT_BITMAP_DELAY 5
68 #define DEFAULT_MAX_WRITE_BEHIND 256
75 /* #include "asm/byteorder.h" Redhat don't like this so... */
76 #if __BYTE_ORDER == __LITTLE_ENDIAN
77 # include <linux/byteorder/little_endian.h>
78 #elif __BYTE_ORDER == __BIG_ENDIAN
79 # include <linux/byteorder/big_endian.h>
80 #elif __BYTE_ORDER == __PDP_ENDIAN
81 # include <linux/byteorder/pdp_endian.h>
83 # error "unknown endianness."
88 /* general information that might be extracted from a superblock */
90 mdu_array_info_t array
;
95 unsigned long long data_offset
;
96 unsigned long long component_size
;
98 unsigned long long reshape_progress
;
99 int new_level
, delta_disks
, new_layout
, new_chunk
;
121 extern char short_options
[];
122 extern char short_bitmap_auto_options
[];
123 extern struct option long_options
[];
124 extern char Version
[], Usage
[], Help
[], OptionHelp
[],
125 Help_create
[], Help_build
[], Help_assemble
[], Help_grow
[],
126 Help_manage
[], Help_misc
[], Help_monitor
[], Help_config
[];
128 /* structures read from config file */
129 /* List of mddevice names and identifiers
130 * Identifiers can be:
132 * super-minor=decimal-minor-number-from-superblock
133 * devices=comma,separated,list,of,device,names,with,wildcards
135 * If multiple fields are present, the intersection of all matching
136 * devices is considered
138 #define UnSet (0xfffe)
139 typedef struct mddev_ident_s
{
146 unsigned int super_minor
;
148 char *devices
; /* comma separated list of device
149 * names with wild cards
152 unsigned int raid_disks
;
153 unsigned int spare_disks
;
154 struct supertype
*st
;
155 int autof
; /* 1 for normal, 2 for partitioned */
160 struct mddev_ident_s
*next
;
163 /* List of device names - wildcards expanded */
164 typedef struct mddev_dev_s
{
166 char disposition
; /* 'a' for add, 'r' for remove, 'f' for fail.
167 * Not set for names read from .config
171 struct mddev_dev_s
*next
;
174 typedef struct mapping
{
185 char *pattern
; /* U or up, _ for down */
186 int percent
; /* -1 if no resync */
187 int resync
; /* 1 if resync, 0 if recovery */
188 struct mdstat_ent
*next
;
191 extern struct mdstat_ent
*mdstat_read(int hold
, int start
);
192 extern void free_mdstat(struct mdstat_ent
*ms
);
193 extern void mdstat_wait(int seconds
);
195 /* Data structure for holding info read from sysfs */
200 unsigned long long offset
, size
;
209 unsigned long long component_size
;
214 /* various details can be requested */
217 #define GET_COMPONENT 4
220 #define GET_DEVS 1024 /* gets role, major, minor */
221 #define GET_OFFSET 2048
222 #define GET_SIZE 4096
223 #define GET_STATE 8192
224 #define GET_ERROR 16384
226 /* If fd >= 0, get the array it is open on,
227 * else use devnum. >=0 -> major9. <0.....
229 extern struct sysarray
*sysfs_read(int fd
, int devnum
, unsigned long options
);
230 extern int sysfs_set_str(struct sysarray
*sra
, struct sysdev
*dev
,
231 char *name
, char *val
);
232 extern int sysfs_set_num(struct sysarray
*sra
, struct sysdev
*dev
,
233 char *name
, unsigned long long val
);
234 extern int sysfs_get_ll(struct sysarray
*sra
, struct sysdev
*dev
,
235 char *name
, unsigned long long *val
);
238 extern int save_stripes(int *source
, unsigned long long *offsets
,
239 int raid_disks
, int chunk_size
, int level
, int layout
,
240 int nwrites
, int *dest
,
241 unsigned long long start
, unsigned long long length
);
242 extern int restore_stripes(int *dest
, unsigned long long *offsets
,
243 int raid_disks
, int chunk_size
, int level
, int layout
,
244 int source
, unsigned long long read_offset
,
245 unsigned long long start
, unsigned long long length
);
248 #define Sendmail "/usr/lib/sendmail -t"
251 #define SYSLOG_FACILITY LOG_DAEMON
253 extern char *map_num(mapping_t
*map
, int num
);
254 extern int map_name(mapping_t
*map
, char *name
);
255 extern mapping_t r5layout
[], pers
[], modes
[], faultylayout
[];
257 extern char *map_dev(int major
, int minor
, int create
);
260 extern struct superswitch
{
261 void (*examine_super
)(void *sbv
);
262 void (*brief_examine_super
)(void *sbv
);
263 void (*detail_super
)(void *sbv
);
264 void (*brief_detail_super
)(void *sbv
);
265 void (*uuid_from_super
)(int uuid
[4], void *sbv
);
266 void (*getinfo_super
)(struct mdinfo
*info
, void *sbv
);
267 int (*update_super
)(struct mdinfo
*info
, void *sbv
, char *update
, char *devname
, int verbose
);
268 __u64 (*event_super
)(void *sbv
);
269 int (*init_super
)(struct supertype
*st
, void **sbp
, mdu_array_info_t
*info
, unsigned long long size
, char *name
);
270 void (*add_to_super
)(void *sbv
, mdu_disk_info_t
*dinfo
);
271 int (*store_super
)(struct supertype
*st
, int fd
, void *sbv
);
272 int (*write_init_super
)(struct supertype
*st
, void *sbv
, mdu_disk_info_t
*dinfo
, char *devname
);
273 int (*compare_super
)(void **firstp
, void *secondv
);
274 int (*load_super
)(struct supertype
*st
, int fd
, void **sbp
, char *devname
);
275 struct supertype
* (*match_metadata_desc
)(char *arg
);
276 __u64 (*avail_size
)(struct supertype
*st
, __u64 size
);
277 int (*add_internal_bitmap
)(struct supertype
*st
, void *sbv
, int chunk
, int delay
, int write_behind
,
278 unsigned long long size
, int may_change
, int major
);
279 void (*locate_bitmap
)(struct supertype
*st
, int fd
, void *sbv
);
280 int (*write_bitmap
)(struct supertype
*st
, int fd
, void *sbv
);
282 int swapuuid
; /* true if uuid is bigending rather than hostendian */
283 } super0
, super1
, *superlist
[];
286 struct superswitch
*ss
;
291 extern struct supertype
*super_by_version(int vers
, int minor
);
292 extern struct supertype
*guess_super(int fd
);
308 extern int add_dev(const char *name
, const struct stat
*stb
, int flag
, struct FTW
*s
);
311 extern int Manage_ro(char *devname
, int fd
, int readonly
);
312 extern int Manage_runstop(char *devname
, int fd
, int runstop
, int quiet
);
313 extern int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
);
314 extern int Manage_reconfig(char *devname
, int fd
, int layout
);
315 extern int Manage_subdevs(char *devname
, int fd
,
316 mddev_dev_t devlist
, int verbose
);
317 extern int Grow_Add_device(char *devname
, int fd
, char *newdev
);
318 extern int Grow_addbitmap(char *devname
, int fd
, char *file
, int chunk
, int delay
, int write_behind
, int force
);
319 extern int Grow_reshape(char *devname
, int fd
, int quiet
, char *backup_file
,
321 int level
, int layout
, int chunksize
, int raid_disks
);
322 extern int Grow_restart(struct supertype
*st
, struct mdinfo
*info
,
323 int *fdlist
, int cnt
, char *backup_file
);
326 extern int Assemble(struct supertype
*st
, char *mddev
, int mdfd
,
329 mddev_dev_t devlist
, char *backup_file
,
330 int readonly
, int runstop
,
332 int verbose
, int force
);
334 extern int Build(char *mddev
, int mdfd
, int chunk
, int level
, int layout
,
336 mddev_dev_t devlist
, int assume_clean
,
337 char *bitmap_file
, int bitmap_chunk
, int write_behind
, int delay
, int verbose
);
340 extern int Create(struct supertype
*st
, char *mddev
, int mdfd
,
341 int chunk
, int level
, int layout
, unsigned long long size
, int raiddisks
, int sparedisks
,
343 int subdevs
, mddev_dev_t devlist
,
344 int runstop
, int verbose
, int force
, int assume_clean
,
345 char *bitmap_file
, int bitmap_chunk
, int write_behind
, int delay
);
347 extern int Detail(char *dev
, int brief
, int test
);
348 extern int Query(char *dev
);
349 extern int Examine(mddev_dev_t devlist
, int brief
, int scan
, int SparcAdjust
,
350 struct supertype
*forcest
);
351 extern int Monitor(mddev_dev_t devlist
,
352 char *mailaddr
, char *alert_cmd
,
353 int period
, int daemonise
, int scan
, int oneshot
,
354 int dosyslog
, char *config
, int test
, char *pidfile
);
356 extern int Kill(char *dev
, int force
, int quiet
);
358 extern int CreateBitmap(char *filename
, int force
, char uuid
[16],
359 unsigned long chunksize
, unsigned long daemon_sleep
,
360 unsigned long write_behind
,
361 unsigned long long array_size
,
363 extern int ExamineBitmap(char *filename
, int brief
, struct supertype
*st
);
364 extern void bitmap_update_uuid(int fd
, int *uuid
);
366 extern int md_get_version(int fd
);
367 extern int get_linux_version(void);
368 extern int parse_uuid(char *str
, int uuid
[4]);
369 extern int check_ext2(int fd
, char *name
);
370 extern int check_reiser(int fd
, char *name
);
371 extern int check_raid(int fd
, char *name
);
373 extern int get_mdp_major(void);
374 extern int dev_open(char *dev
, int flags
);
375 extern int is_standard(char *dev
, int *nump
);
377 extern int parse_auto(char *str
, char *msg
);
378 extern mddev_ident_t
conf_get_ident(char *conffile
, char *dev
);
379 extern mddev_dev_t
conf_get_devs(char *conffile
);
380 extern struct createinfo
*conf_get_create_info(char *conffile
);
381 extern char *conf_get_mailaddr(char *conffile
);
382 extern char *conf_get_mailfrom(char *conffile
);
383 extern char *conf_get_program(char *conffile
);
384 extern char *conf_line(FILE *file
);
385 extern char *conf_word(FILE *file
, int allow_key
);
386 extern void free_line(char *line
);
387 extern int match_oneof(char *devices
, char *devname
);
388 extern void uuid_from_super(int uuid
[4], mdp_super_t
*super
);
389 extern int same_uuid(int a
[4], int b
[4], int swapuuid
);
390 /* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/
391 extern unsigned long calc_csum(void *super
, int bytes
);
392 extern int enough(int level
, int raid_disks
, int layout
,
393 char *avail
, int avail_disks
);
394 extern int ask(char *mesg
);
395 extern unsigned long long get_component_size(int fd
);
398 extern char *human_size(long long bytes
);
399 char *human_size_brief(long long bytes
);
401 extern void put_md_name(char *name
);
402 extern char *get_md_name(int dev
);
404 extern char DefaultConfFile
[];
406 extern int open_mddev(char *dev
, int autof
);
409 #define LEVEL_MULTIPATH (-4)
410 #define LEVEL_LINEAR (-1)
411 #define LEVEL_FAULTY (-5)
416 #define WriteTransient 0
417 #define ReadTransient 1
418 #define WritePersistent 2
419 #define ReadPersistent 3
420 #define WriteAll 4 /* doesn't go to device */
421 #define ReadFixable 5
424 #define ClearErrors 31
425 #define ClearFaults 30
427 #define AllPersist 100 /* internal use only */
428 #define NoPersist 101
430 #define ModeMask 0x1f
438 #define minor(x) ((x)&0xff)
439 #define major(x) (((x)>>8)&0xff)
440 #define makedev(M,m) (((M)<<8) | (m))
444 #define ALGORITHM_LEFT_ASYMMETRIC 0
445 #define ALGORITHM_RIGHT_ASYMMETRIC 1
446 #define ALGORITHM_LEFT_SYMMETRIC 2
447 #define ALGORITHM_RIGHT_SYMMETRIC 3