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mdadm-1.4.0
[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>
32extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
33
34#include <sys/types.h>
35#include <sys/stat.h>
36#include <stdlib.h>
37#include <time.h>
38#include <getopt.h>
39#include <fcntl.h>
40#include <stdio.h>
41#include <errno.h>
42#include <string.h>
43
44#include <linux/kdev_t.h>
45/*#include <linux/fs.h> */
46#include <sys/mount.h>
47#include <asm/types.h>
48#include <sys/ioctl.h>
49#define MD_MAJOR 9
50
51#ifndef BLKGETSIZE64
52#define BLKGETSIZE64 _IOR(0x12,114,sizeof(__u64)) /* return device size in bytes (u64 *arg) */
53#endif
54
55
56#include "md_u.h"
57#include "md_p.h"
58
59#define Name "mdadm"
60
61enum mode {
62 ASSEMBLE=1,
63 BUILD,
64 CREATE,
65 MANAGE,
66 MISC,
67 MONITOR,
68};
69
70extern char short_options[];
71extern struct option long_options[];
72extern char Version[], Usage[], Help[], OptionHelp[],
73 Help_create[], Help_build[], Help_assemble[],
74 Help_manage[], Help_misc[], Help_monitor[], Help_config[];
75
76/* structures read from config file */
77/* List of mddevice names and identifiers
78 * Identifiers can be:
79 * uuid=128-hex-uuid
80 * super-minor=decimal-minor-number-from-superblock
81 * devices=comma,separated,list,of,device,names,with,wildcards
82 *
83 * If multiple fields are present, the intersection of all matching
84 * devices is considered
85 */
86typedef struct mddev_ident_s {
87 char *devname;
88
89 int uuid_set;
90 __u32 uuid[4];
91
92 int super_minor; /* -1 if not set */
93
94 char *devices; /* comma separated list of device
95 * names with wild cards
96 */
97 int level; /* -10 if not set */
98 int raid_disks; /* -1 if not set */
99 int spare_disks; /* -1 if not set */
100 char *spare_group;
101 struct mddev_ident_s *next;
102} *mddev_ident_t;
103
104/* List of device names - wildcards expanded */
105typedef struct mddev_dev_s {
106 char *devname;
107 char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
108 * Not set for names read from .config
109 */
110 struct mddev_dev_s *next;
111} *mddev_dev_t;
112
113typedef struct mapping {
114 char *name;
115 int num;
116} mapping_t;
117
118
119struct mdstat_ent {
120 char *dev;
121 int devnum;
122 int active;
123 char *level;
124 char *pattern; /* U or up, _ for down */
125 int percent; /* -1 if no resync */
126 struct mdstat_ent *next;
127};
128
129extern struct mdstat_ent *mdstat_read(void);
130extern void free_mdstat(struct mdstat_ent *ms);
131
132#ifndef Sendmail
133#define Sendmail "/usr/lib/sendmail -t"
134#endif
135
136extern char *map_num(mapping_t *map, int num);
137extern int map_name(mapping_t *map, char *name);
138extern mapping_t r5layout[], pers[], modes[];
139
140extern char *map_dev(int major, int minor);
141
142
143extern int Manage_ro(char *devname, int fd, int readonly);
144extern int Manage_runstop(char *devname, int fd, int runstop);
145extern int Manage_subdevs(char *devname, int fd,
146 mddev_dev_t devlist);
147
148
149extern int Assemble(char *mddev, int mdfd,
150 mddev_ident_t ident,
151 char *conffile,
152 mddev_dev_t devlist,
153 int readonly, int runstop,
154 char *update,
155 int verbose, int force);
156
157extern int Build(char *mddev, int mdfd, int chunk, int level,
158 int raiddisks,
159 mddev_dev_t devlist);
160
161
162extern int Create(char *mddev, int mdfd,
163 int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks,
164 int subdevs, mddev_dev_t devlist,
165 int runstop, int verbose, int force);
166
167extern int Detail(char *dev, int brief, int test);
168extern int Query(char *dev);
169extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust);
170extern int Monitor(mddev_dev_t devlist,
171 char *mailaddr, char *alert_cmd,
172 int period, int daemonise, int scan, int oneshot,
173 char *config);
174
175extern int Kill(char *dev, int force);
176
177extern int md_get_version(int fd);
178extern int get_linux_version(void);
179extern int parse_uuid(char *str, int uuid[4]);
180extern int check_ext2(int fd, char *name);
181extern int check_reiser(int fd, char *name);
182extern int check_raid(int fd, char *name);
183
184extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
185extern mddev_dev_t conf_get_devs(char *conffile);
186extern char *conf_get_mailaddr(char *conffile);
187extern char *conf_get_program(char *conffile);
188extern char *conf_line(FILE *file);
189extern void free_line(char *line);
190extern int match_oneof(char *devices, char *devname);
191extern int load_super(int fd, mdp_super_t *super);
192extern void uuid_from_super(int uuid[4], mdp_super_t *super);
193extern int same_uuid(int a[4], int b[4]);
194extern int compare_super(mdp_super_t *first, mdp_super_t *second);
195extern int calc_sb_csum(mdp_super_t *super);
196extern int store_super(int fd, mdp_super_t *super);
197extern int enough(int level, int raid_disks, int avail_disks);
198extern int ask(char *mesg);
199
200
201extern char *human_size(long long bytes);
202char *human_size_brief(long long bytes);
203
204extern void put_md_name(char *name);
205extern char *get_md_name(int dev);
206
207extern char DefaultConfFile[];
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