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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__ | |
33 | extern __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 | |
46 | int strncmp(const char *s1, const char *s2, size_t n) __THROW __pure__; | |
47 | char *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 | #define DEFAULT_BITMAP_CHUNK 4096 | |
65 | #define DEFAULT_BITMAP_DELAY 5 | |
66 | ||
67 | #include "md_u.h" | |
68 | #include "md_p.h" | |
69 | #include "bitmap.h" | |
70 | ||
71 | /* general information that might be extracted from a superblock */ | |
72 | struct mdinfo { | |
73 | mdu_array_info_t array; | |
74 | mdu_disk_info_t disk; | |
75 | __u64 events; | |
76 | unsigned int uuid[4]; | |
77 | }; | |
78 | ||
79 | #define Name "mdadm" | |
80 | ||
81 | enum mode { | |
82 | ASSEMBLE=1, | |
83 | BUILD, | |
84 | CREATE, | |
85 | MANAGE, | |
86 | MISC, | |
87 | MONITOR, | |
88 | GROW, | |
89 | }; | |
90 | ||
91 | extern char short_options[]; | |
92 | extern struct option long_options[]; | |
93 | extern char Version[], Usage[], Help[], OptionHelp[], | |
94 | Help_create[], Help_build[], Help_assemble[], Help_grow[], | |
95 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; | |
96 | ||
97 | /* structures read from config file */ | |
98 | /* List of mddevice names and identifiers | |
99 | * Identifiers can be: | |
100 | * uuid=128-hex-uuid | |
101 | * super-minor=decimal-minor-number-from-superblock | |
102 | * devices=comma,separated,list,of,device,names,with,wildcards | |
103 | * | |
104 | * If multiple fields are present, the intersection of all matching | |
105 | * devices is considered | |
106 | */ | |
107 | #define UnSet (0xfffe) | |
108 | typedef struct mddev_ident_s { | |
109 | char *devname; | |
110 | ||
111 | int uuid_set; | |
112 | int uuid[4]; | |
113 | ||
114 | unsigned int super_minor; | |
115 | ||
116 | char *devices; /* comma separated list of device | |
117 | * names with wild cards | |
118 | */ | |
119 | int level; | |
120 | unsigned int raid_disks; | |
121 | unsigned int spare_disks; | |
122 | struct supertype *st; | |
123 | int autof; /* 1 for normal, 2 for partitioned */ | |
124 | char *spare_group; | |
125 | int bitmap_fd; | |
126 | ||
127 | struct mddev_ident_s *next; | |
128 | } *mddev_ident_t; | |
129 | ||
130 | /* List of device names - wildcards expanded */ | |
131 | typedef struct mddev_dev_s { | |
132 | char *devname; | |
133 | char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. | |
134 | * Not set for names read from .config | |
135 | */ | |
136 | struct mddev_dev_s *next; | |
137 | } *mddev_dev_t; | |
138 | ||
139 | typedef struct mapping { | |
140 | char *name; | |
141 | int num; | |
142 | } mapping_t; | |
143 | ||
144 | ||
145 | struct mdstat_ent { | |
146 | char *dev; | |
147 | int devnum; | |
148 | int active; | |
149 | char *level; | |
150 | char *pattern; /* U or up, _ for down */ | |
151 | int percent; /* -1 if no resync */ | |
152 | int resync; /* 1 if resync, 0 if recovery */ | |
153 | struct mdstat_ent *next; | |
154 | }; | |
155 | ||
156 | extern struct mdstat_ent *mdstat_read(int); | |
157 | extern void free_mdstat(struct mdstat_ent *ms); | |
158 | extern void mdstat_wait(int seconds); | |
159 | ||
160 | #ifndef Sendmail | |
161 | #define Sendmail "/usr/lib/sendmail -t" | |
162 | #endif | |
163 | ||
164 | extern char *map_num(mapping_t *map, int num); | |
165 | extern int map_name(mapping_t *map, char *name); | |
166 | extern mapping_t r5layout[], pers[], modes[], faultylayout[]; | |
167 | ||
168 | extern char *map_dev(int major, int minor); | |
169 | ||
170 | ||
171 | extern struct superswitch { | |
172 | void (*examine_super)(void *sbv); | |
173 | void (*brief_examine_super)(void *sbv); | |
174 | void (*detail_super)(void *sbv); | |
175 | void (*brief_detail_super)(void *sbv); | |
176 | void (*uuid_from_super)(int uuid[4], void *sbv); | |
177 | void (*getinfo_super)(struct mdinfo *info, void *sbv); | |
178 | int (*update_super)(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose); | |
179 | __u64 (*event_super)(void *sbv); | |
180 | int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info); | |
181 | void (*add_to_super)(void *sbv, mdu_disk_info_t *dinfo); | |
182 | int (*store_super)(struct supertype *st, int fd, void *sbv); | |
183 | int (*write_init_super)(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname); | |
184 | int (*compare_super)(void **firstp, void *secondv); | |
185 | int (*load_super)(struct supertype *st, int fd, void **sbp, char *devname); | |
186 | struct supertype * (*match_metadata_desc)(char *arg); | |
187 | __u64 (*avail_size)(__u64 size); | |
188 | int (*add_internal_bitmap)(void *sbv, int chunk, int delay, unsigned long long size); | |
189 | void (*locate_bitmap)(struct supertype *st, int fd); | |
190 | int (*write_bitmap)(struct supertype *st, int fd, void *sbv); | |
191 | int major; | |
192 | } super0, super1, *superlist[]; | |
193 | ||
194 | struct supertype { | |
195 | struct superswitch *ss; | |
196 | int minor_version; | |
197 | int max_devs; | |
198 | }; | |
199 | ||
200 | extern struct supertype *super_by_version(int vers, int minor); | |
201 | extern struct supertype *guess_super(int fd); | |
202 | ||
203 | ||
204 | extern int Manage_ro(char *devname, int fd, int readonly); | |
205 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); | |
206 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); | |
207 | extern int Manage_reconfig(char *devname, int fd, int layout); | |
208 | extern int Manage_subdevs(char *devname, int fd, | |
209 | mddev_dev_t devlist); | |
210 | extern int Grow_Add_device(char *devname, int fd, char *newdev); | |
211 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay); | |
212 | ||
213 | ||
214 | extern int Assemble(struct supertype *st, char *mddev, int mdfd, | |
215 | mddev_ident_t ident, | |
216 | char *conffile, | |
217 | mddev_dev_t devlist, | |
218 | int readonly, int runstop, | |
219 | char *update, | |
220 | int verbose, int force); | |
221 | ||
222 | extern int Build(char *mddev, int mdfd, int chunk, int level, int layout, | |
223 | int raiddisks, | |
224 | mddev_dev_t devlist, int assume_clean, | |
225 | char *bitmap_file, int bitmap_chunk, int delay); | |
226 | ||
227 | ||
228 | extern int Create(struct supertype *st, char *mddev, int mdfd, | |
229 | int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks, | |
230 | int subdevs, mddev_dev_t devlist, | |
231 | int runstop, int verbose, int force, | |
232 | char *bitmap_file, int bitmap_chunk, int delay); | |
233 | ||
234 | extern int Detail(char *dev, int brief, int test); | |
235 | extern int Query(char *dev); | |
236 | extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust, | |
237 | struct supertype *forcest); | |
238 | extern int Monitor(mddev_dev_t devlist, | |
239 | char *mailaddr, char *alert_cmd, | |
240 | int period, int daemonise, int scan, int oneshot, | |
241 | char *config, int test, char *pidfile); | |
242 | ||
243 | extern int Kill(char *dev, int force); | |
244 | ||
245 | extern int CreateBitmap(char *filename, int force, char uuid[16], | |
246 | unsigned long chunksize, unsigned long daemon_sleep, | |
247 | unsigned long long array_size); | |
248 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); | |
249 | ||
250 | extern int md_get_version(int fd); | |
251 | extern int get_linux_version(void); | |
252 | extern int parse_uuid(char *str, int uuid[4]); | |
253 | extern int check_ext2(int fd, char *name); | |
254 | extern int check_reiser(int fd, char *name); | |
255 | extern int check_raid(int fd, char *name); | |
256 | ||
257 | extern int get_mdp_major(void); | |
258 | extern int is_standard(char *dev, int *nump); | |
259 | ||
260 | ||
261 | extern mddev_ident_t conf_get_ident(char *conffile, char *dev); | |
262 | extern mddev_dev_t conf_get_devs(char *conffile); | |
263 | extern char *conf_get_mailaddr(char *conffile); | |
264 | extern char *conf_get_program(char *conffile); | |
265 | extern char *conf_line(FILE *file); | |
266 | extern char *conf_word(FILE *file, int allow_key); | |
267 | extern void free_line(char *line); | |
268 | extern int match_oneof(char *devices, char *devname); | |
269 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); | |
270 | extern int same_uuid(int a[4], int b[4]); | |
271 | /* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/ | |
272 | extern unsigned long calc_csum(void *super, int bytes); | |
273 | extern int enough(int level, int raid_disks, int avail_disks); | |
274 | extern int ask(char *mesg); | |
275 | ||
276 | ||
277 | extern char *human_size(long long bytes); | |
278 | char *human_size_brief(long long bytes); | |
279 | ||
280 | extern void put_md_name(char *name); | |
281 | extern char *get_md_name(int dev); | |
282 | ||
283 | extern char DefaultConfFile[]; | |
284 | ||
285 | extern int open_mddev(char *dev, int autof); | |
286 | ||
287 | ||
288 | #define LEVEL_MULTIPATH (-4) | |
289 | #define LEVEL_LINEAR (-1) | |
290 | #define LEVEL_FAULTY (-5) | |
291 | ||
292 | ||
293 | /* faulty stuff */ | |
294 | ||
295 | #define WriteTransient 0 | |
296 | #define ReadTransient 1 | |
297 | #define WritePersistent 2 | |
298 | #define ReadPersistent 3 | |
299 | #define WriteAll 4 /* doesn't go to device */ | |
300 | #define ReadFixable 5 | |
301 | #define Modes 6 | |
302 | ||
303 | #define ClearErrors 31 | |
304 | #define ClearFaults 30 | |
305 | ||
306 | #define AllPersist 100 /* internal use only */ | |
307 | #define NoPersist 101 | |
308 | ||
309 | #define ModeMask 0x1f | |
310 | #define ModeShift 5 |