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mdadm-1.6.0
[thirdparty/mdadm.git] / mdadm.h
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1/*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
5 *
6 *
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.
11 *
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.
16 *
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
20 *
21 * Author: Neil Brown
22 * Email: <neilb@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 */
29
30#define __USE_LARGEFILE64
31#include <unistd.h>
32#ifndef __dietlibc__
33extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
34#endif
35
36#include <sys/types.h>
37#include <sys/stat.h>
38#include <stdlib.h>
39#include <time.h>
40#include <getopt.h>
41#include <fcntl.h>
42#include <stdio.h>
43#include <errno.h>
44#include <string.h>
45#ifdef __dietlibc__NONO
46int strncmp(const char *s1, const char *s2, size_t n) __THROW __pure__;
47char *strncpy(char *dest, const char *src, size_t n) __THROW;
48#include <strings.h>
49#endif
50
51
52#include <linux/kdev_t.h>
53/*#include <linux/fs.h> */
54#include <sys/mount.h>
55#include <asm/types.h>
56#include <sys/ioctl.h>
57#define MD_MAJOR 9
58#define MdpMinorShift 6
59
60#ifndef BLKGETSIZE64
61#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
62#endif
63
64
65#include "md_u.h"
66#include "md_p.h"
67
68#define Name "mdadm"
69
70enum mode {
71 ASSEMBLE=1,
72 BUILD,
73 CREATE,
74 MANAGE,
75 MISC,
76 MONITOR,
77 GROW,
78};
79
80extern char short_options[];
81extern struct option long_options[];
82extern char Version[], Usage[], Help[], OptionHelp[],
83 Help_create[], Help_build[], Help_assemble[], Help_grow[],
84 Help_manage[], Help_misc[], Help_monitor[], Help_config[];
85
86/* structures read from config file */
87/* List of mddevice names and identifiers
88 * Identifiers can be:
89 * uuid=128-hex-uuid
90 * super-minor=decimal-minor-number-from-superblock
91 * devices=comma,separated,list,of,device,names,with,wildcards
92 *
93 * If multiple fields are present, the intersection of all matching
94 * devices is considered
95 */
96#define UnSet (0xfffe)
97typedef struct mddev_ident_s {
98 char *devname;
99
100 int uuid_set;
101 __u32 uuid[4];
102
103 unsigned int super_minor;
104
105 char *devices; /* comma separated list of device
106 * names with wild cards
107 */
108 int level;
109 unsigned int raid_disks;
110 unsigned int spare_disks;
111 int autof; /* 1 for normal, 2 for partitioned */
112 char *spare_group;
113
114 struct mddev_ident_s *next;
115} *mddev_ident_t;
116
117/* List of device names - wildcards expanded */
118typedef struct mddev_dev_s {
119 char *devname;
120 char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
121 * Not set for names read from .config
122 */
123 struct mddev_dev_s *next;
124} *mddev_dev_t;
125
126typedef struct mapping {
127 char *name;
128 int num;
129} mapping_t;
130
131
132struct mdstat_ent {
133 char *dev;
134 int devnum;
135 int active;
136 char *level;
137 char *pattern; /* U or up, _ for down */
138 int percent; /* -1 if no resync */
139 struct mdstat_ent *next;
140};
141
142extern struct mdstat_ent *mdstat_read(int);
143extern void free_mdstat(struct mdstat_ent *ms);
144extern void mdstat_wait(int seconds);
145
146#ifndef Sendmail
147#define Sendmail "/usr/lib/sendmail -t"
148#endif
149
150extern char *map_num(mapping_t *map, int num);
151extern int map_name(mapping_t *map, char *name);
152extern mapping_t r5layout[], pers[], modes[];
153
154extern char *map_dev(int major, int minor);
155
156
157extern int Manage_ro(char *devname, int fd, int readonly);
158extern int Manage_runstop(char *devname, int fd, int runstop);
159extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
160extern int Manage_subdevs(char *devname, int fd,
161 mddev_dev_t devlist);
162
163
164extern int Assemble(char *mddev, int mdfd,
165 mddev_ident_t ident,
166 char *conffile,
167 mddev_dev_t devlist,
168 int readonly, int runstop,
169 char *update,
170 int verbose, int force);
171
172extern int Build(char *mddev, int mdfd, int chunk, int level,
173 int raiddisks,
174 mddev_dev_t devlist, int assume_clean);
175
176
177extern int Create(char *mddev, int mdfd,
178 int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks,
179 int subdevs, mddev_dev_t devlist,
180 int runstop, int verbose, int force);
181
182extern int Detail(char *dev, int brief, int test);
183extern int Query(char *dev);
184extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust);
185extern int Monitor(mddev_dev_t devlist,
186 char *mailaddr, char *alert_cmd,
187 int period, int daemonise, int scan, int oneshot,
188 char *config, int test);
189
190extern int Kill(char *dev, int force);
191
192extern int md_get_version(int fd);
193extern int get_linux_version(void);
194extern int parse_uuid(char *str, int uuid[4]);
195extern int check_ext2(int fd, char *name);
196extern int check_reiser(int fd, char *name);
197extern int check_raid(int fd, char *name);
198
199extern int get_mdp_major(void);
200extern int is_standard(char *dev);
201
202
203extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
204extern mddev_dev_t conf_get_devs(char *conffile);
205extern char *conf_get_mailaddr(char *conffile);
206extern char *conf_get_program(char *conffile);
207extern char *conf_line(FILE *file);
208extern char *conf_word(FILE *file, int allow_key);
209extern void free_line(char *line);
210extern int match_oneof(char *devices, char *devname);
211extern int load_super(int fd, mdp_super_t *super);
212extern void uuid_from_super(int uuid[4], mdp_super_t *super);
213extern int same_uuid(int a[4], int b[4]);
214extern int compare_super(mdp_super_t *first, mdp_super_t *second);
215extern unsigned long calc_sb_csum(mdp_super_t *super);
216extern int store_super(int fd, mdp_super_t *super);
217extern int enough(int level, int raid_disks, int avail_disks);
218extern int ask(char *mesg);
219
220
221extern char *human_size(long long bytes);
222char *human_size_brief(long long bytes);
223
224extern void put_md_name(char *name);
225extern char *get_md_name(int dev);
226
227extern char DefaultConfFile[];
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