mdadm-1.0.1
[thirdparty/mdadm.git] / mdadm.h
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 extern __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
61 enum mode {
62 ASSEMBLE=1,
63 BUILD,
64 CREATE,
65 MANAGE,
66 MISC,
67 MONITOR,
68 };
69
70 extern char short_options[];
71 extern struct option long_options[];
72 extern char Version[], Usage[], Help[],
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 */
86 typedef 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 char *spare_group;
100 struct mddev_ident_s *next;
101 } *mddev_ident_t;
102
103 /* List of device names - wildcards expanded */
104 typedef struct mddev_dev_s {
105 char *devname;
106 char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
107 * Not set for names read from .config
108 */
109 struct mddev_dev_s *next;
110 } *mddev_dev_t;
111
112 typedef struct mapping {
113 char *name;
114 int num;
115 } mapping_t;
116
117
118 struct mdstat_ent {
119 char *dev;
120 int devnum;
121 int active;
122 char *level;
123 char *pattern; /* U or up, _ for down */
124 int percent; /* -1 if no resync */
125 struct mdstat_ent *next;
126 };
127
128 extern struct mdstat_ent *mdstat_read(void);
129 extern void free_mdstat(struct mdstat_ent *ms);
130
131 #ifndef Sendmail
132 #define Sendmail "/usr/lib/sendmail -t"
133 #endif
134
135 extern char *map_num(mapping_t *map, int num);
136 extern int map_name(mapping_t *map, char *name);
137 extern mapping_t r5layout[], pers[], modes[];
138
139 extern char *map_dev(int major, int minor);
140
141
142 extern int Manage_ro(char *devname, int fd, int readonly);
143 extern int Manage_runstop(char *devname, int fd, int runstop);
144 extern int Manage_subdevs(char *devname, int fd,
145 mddev_dev_t devlist);
146
147
148 extern int Assemble(char *mddev, int mdfd,
149 mddev_ident_t ident,
150 char *conffile,
151 mddev_dev_t devlist,
152 int readonly, int runstop,
153 int verbose, int force);
154
155 extern int Build(char *mddev, int mdfd, int chunk, int level,
156 int raiddisks,
157 mddev_dev_t devlist);
158
159
160 extern int Create(char *mddev, int mdfd,
161 int chunk, int level, int layout, int size, int raiddisks, int sparedisks,
162 int subdevs, mddev_dev_t devlist,
163 int runstop, int verbose, int force);
164
165 extern int Detail(char *dev, int brief);
166 extern int Query(char *dev);
167 extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust);
168 extern int Monitor(mddev_dev_t devlist,
169 char *mailaddr, char *alert_cmd,
170 int period, int scan,
171 char *config);
172
173 extern int Kill(char *dev, int force);
174
175 extern int md_get_version(int fd);
176 extern int get_linux_version(void);
177 extern int parse_uuid(char *str, int uuid[4]);
178 extern int check_ext2(int fd, char *name);
179 extern int check_reiser(int fd, char *name);
180 extern int check_raid(int fd, char *name);
181
182 extern mddev_ident_t conf_get_ident(char *conffile, char *dev);
183 extern mddev_dev_t conf_get_devs(char *conffile);
184 extern char *conf_get_mailaddr(char *conffile);
185 extern char *conf_get_program(char *conffile);
186 extern char *conf_line(FILE *file);
187 extern void free_line(char *line);
188 extern int match_oneof(char *devices, char *devname);
189 extern int load_super(int fd, mdp_super_t *super);
190 extern void uuid_from_super(int uuid[4], mdp_super_t *super);
191 extern int same_uuid(int a[4], int b[4]);
192 extern int compare_super(mdp_super_t *first, mdp_super_t *second);
193 extern int calc_sb_csum(mdp_super_t *super);
194 extern int store_super(int fd, mdp_super_t *super);
195 extern int enough(int level, int raid_disks, int avail_disks);
196 extern int ask(char *mesg);
197
198
199 extern char *human_size(long long bytes);
200 char *human_size_brief(long long bytes);
201
202 extern void put_md_name(char *name);
203 extern char *get_md_name(int dev);
204
205 extern char DefaultConfFile[];