]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - mdadm.h
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
30 #define __USE_LARGEFILE64
33 extern __off64_t lseek64
__P ((int __fd
, __off64_t __offset
, int __whence
));
36 #include <sys/types.h>
46 #ifdef __dietlibc__NONO
47 int strncmp(const char *s1
, const char *s2
, size_t n
) __THROW __pure__
;
48 char *strncpy(char *dest
, const char *src
, size_t n
) __THROW
;
53 #include <linux/kdev_t.h>
54 /*#include <linux/fs.h> */
55 #include <sys/mount.h>
56 #include <asm/types.h>
57 #include <sys/ioctl.h>
59 #define MdpMinorShift 6
62 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
65 #define DEFAULT_BITMAP_CHUNK 4096
66 #define DEFAULT_BITMAP_DELAY 5
67 #define DEFAULT_MAX_WRITE_BEHIND 256
73 /* general information that might be extracted from a superblock */
75 mdu_array_info_t array
;
93 extern char short_options
[];
94 extern struct option long_options
[];
95 extern char Version
[], Usage
[], Help
[], OptionHelp
[],
96 Help_create
[], Help_build
[], Help_assemble
[], Help_grow
[],
97 Help_manage
[], Help_misc
[], Help_monitor
[], Help_config
[];
99 /* structures read from config file */
100 /* List of mddevice names and identifiers
101 * Identifiers can be:
103 * super-minor=decimal-minor-number-from-superblock
104 * devices=comma,separated,list,of,device,names,with,wildcards
106 * If multiple fields are present, the intersection of all matching
107 * devices is considered
109 #define UnSet (0xfffe)
110 typedef struct mddev_ident_s
{
117 unsigned int super_minor
;
119 char *devices
; /* comma separated list of device
120 * names with wild cards
123 unsigned int raid_disks
;
124 unsigned int spare_disks
;
125 struct supertype
*st
;
126 int autof
; /* 1 for normal, 2 for partitioned */
130 struct mddev_ident_s
*next
;
133 /* List of device names - wildcards expanded */
134 typedef struct mddev_dev_s
{
136 char disposition
; /* 'a' for add, 'r' for remove, 'f' for fail.
137 * Not set for names read from .config
141 struct mddev_dev_s
*next
;
144 typedef struct mapping
{
155 char *pattern
; /* U or up, _ for down */
156 int percent
; /* -1 if no resync */
157 int resync
; /* 1 if resync, 0 if recovery */
158 struct mdstat_ent
*next
;
161 extern struct mdstat_ent
*mdstat_read(int);
162 extern void free_mdstat(struct mdstat_ent
*ms
);
163 extern void mdstat_wait(int seconds
);
166 #define Sendmail "/usr/lib/sendmail -t"
169 extern char *map_num(mapping_t
*map
, int num
);
170 extern int map_name(mapping_t
*map
, char *name
);
171 extern mapping_t r5layout
[], pers
[], modes
[], faultylayout
[];
173 extern char *map_dev(int major
, int minor
);
176 extern struct superswitch
{
177 void (*examine_super
)(void *sbv
);
178 void (*brief_examine_super
)(void *sbv
);
179 void (*detail_super
)(void *sbv
);
180 void (*brief_detail_super
)(void *sbv
);
181 void (*uuid_from_super
)(int uuid
[4], void *sbv
);
182 void (*getinfo_super
)(struct mdinfo
*info
, mddev_ident_t ident
, void *sbv
);
183 int (*update_super
)(struct mdinfo
*info
, void *sbv
, char *update
, char *devname
, int verbose
);
184 __u64 (*event_super
)(void *sbv
);
185 int (*init_super
)(struct supertype
*st
, void **sbp
, mdu_array_info_t
*info
, char *name
);
186 void (*add_to_super
)(void *sbv
, mdu_disk_info_t
*dinfo
);
187 int (*store_super
)(struct supertype
*st
, int fd
, void *sbv
);
188 int (*write_init_super
)(struct supertype
*st
, void *sbv
, mdu_disk_info_t
*dinfo
, char *devname
);
189 int (*compare_super
)(void **firstp
, void *secondv
);
190 int (*load_super
)(struct supertype
*st
, int fd
, void **sbp
, char *devname
);
191 struct supertype
* (*match_metadata_desc
)(char *arg
);
192 __u64 (*avail_size
)(struct supertype
*st
, __u64 size
);
193 int (*add_internal_bitmap
)(struct supertype
*st
, void *sbv
, int chunk
, int delay
, int write_behind
, int *sizep
, int may_change
);
194 void (*locate_bitmap
)(struct supertype
*st
, int fd
);
195 int (*write_bitmap
)(struct supertype
*st
, int fd
, void *sbv
);
197 int swapuuid
; /* true if uuid is bigending rather than hostendian */
198 } super0
, super1
, *superlist
[];
201 struct superswitch
*ss
;
206 extern struct supertype
*super_by_version(int vers
, int minor
);
207 extern struct supertype
*guess_super(int fd
);
213 # define __USE_XOPEN_EXTENDED
220 extern int add_dev(const char *name
, const struct stat
*stb
, int flag
, struct FTW
*s
);
223 extern int Manage_ro(char *devname
, int fd
, int readonly
);
224 extern int Manage_runstop(char *devname
, int fd
, int runstop
, int quiet
);
225 extern int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
);
226 extern int Manage_reconfig(char *devname
, int fd
, int layout
);
227 extern int Manage_subdevs(char *devname
, int fd
,
228 mddev_dev_t devlist
, int verbose
);
229 extern int Grow_Add_device(char *devname
, int fd
, char *newdev
);
230 extern int Grow_addbitmap(char *devname
, int fd
, char *file
, int chunk
, int delay
, int write_behind
);
233 extern int Assemble(struct supertype
*st
, char *mddev
, int mdfd
,
237 int readonly
, int runstop
,
239 int verbose
, int force
);
241 extern int Build(char *mddev
, int mdfd
, int chunk
, int level
, int layout
,
243 mddev_dev_t devlist
, int assume_clean
,
244 char *bitmap_file
, int bitmap_chunk
, int write_behind
, int delay
, int verbose
);
247 extern int Create(struct supertype
*st
, char *mddev
, int mdfd
,
248 int chunk
, int level
, int layout
, unsigned long size
, int raiddisks
, int sparedisks
,
250 int subdevs
, mddev_dev_t devlist
,
251 int runstop
, int verbose
, int force
,
252 char *bitmap_file
, int bitmap_chunk
, int write_behind
, int delay
);
254 extern int Detail(char *dev
, int brief
, int test
);
255 extern int Query(char *dev
);
256 extern int Examine(mddev_dev_t devlist
, int brief
, int scan
, int SparcAdjust
,
257 struct supertype
*forcest
);
258 extern int Monitor(mddev_dev_t devlist
,
259 char *mailaddr
, char *alert_cmd
,
260 int period
, int daemonise
, int scan
, int oneshot
,
261 char *config
, int test
, char *pidfile
);
263 extern int Kill(char *dev
, int force
);
265 extern int CreateBitmap(char *filename
, int force
, char uuid
[16],
266 unsigned long chunksize
, unsigned long daemon_sleep
,
267 unsigned long write_behind
,
268 unsigned long long array_size
);
269 extern int ExamineBitmap(char *filename
, int brief
, struct supertype
*st
);
271 extern int md_get_version(int fd
);
272 extern int get_linux_version(void);
273 extern int parse_uuid(char *str
, int uuid
[4]);
274 extern int check_ext2(int fd
, char *name
);
275 extern int check_reiser(int fd
, char *name
);
276 extern int check_raid(int fd
, char *name
);
278 extern int get_mdp_major(void);
279 extern int is_standard(char *dev
, int *nump
);
282 extern mddev_ident_t
conf_get_ident(char *conffile
, char *dev
);
283 extern mddev_dev_t
conf_get_devs(char *conffile
);
284 extern char *conf_get_mailaddr(char *conffile
);
285 extern char *conf_get_program(char *conffile
);
286 extern char *conf_line(FILE *file
);
287 extern char *conf_word(FILE *file
, int allow_key
);
288 extern void free_line(char *line
);
289 extern int match_oneof(char *devices
, char *devname
);
290 extern void uuid_from_super(int uuid
[4], mdp_super_t
*super
);
291 extern int same_uuid(int a
[4], int b
[4], int swapuuid
);
292 /* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/
293 extern unsigned long calc_csum(void *super
, int bytes
);
294 extern int enough(int level
, int raid_disks
, int avail_disks
);
295 extern int ask(char *mesg
);
298 extern char *human_size(long long bytes
);
299 char *human_size_brief(long long bytes
);
301 extern void put_md_name(char *name
);
302 extern char *get_md_name(int dev
);
304 extern char DefaultConfFile
[];
306 extern int open_mddev(char *dev
, int autof
);
309 #define LEVEL_MULTIPATH (-4)
310 #define LEVEL_LINEAR (-1)
311 #define LEVEL_FAULTY (-5)
316 #define WriteTransient 0
317 #define ReadTransient 1
318 #define WritePersistent 2
319 #define ReadPersistent 3
320 #define WriteAll 4 /* doesn't go to device */
321 #define ReadFixable 5
324 #define ClearErrors 31
325 #define ClearFaults 30
327 #define AllPersist 100 /* internal use only */
328 #define NoPersist 101
330 #define ModeMask 0x1f
338 #define minor(x) ((x)&0xff)
339 #define major(x) (((x)>>8)&0xff)
340 #define makedev(M,m) (((M)<<8) | (m))