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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 <sys/time.h> | |
41 | #include <getopt.h> | |
42 | #include <fcntl.h> | |
43 | #include <stdio.h> | |
44 | #include <errno.h> | |
45 | #include <string.h> | |
46 | #include <syslog.h> | |
47 | #ifdef __dietlibc__NONO | |
48 | int strncmp(const char *s1, const char *s2, size_t n) __THROW __pure__; | |
49 | char *strncpy(char *dest, const char *src, size_t n) __THROW; | |
50 | #include <strings.h> | |
51 | #endif | |
52 | ||
53 | ||
54 | #include <linux/kdev_t.h> | |
55 | /*#include <linux/fs.h> */ | |
56 | #include <sys/mount.h> | |
57 | #include <asm/types.h> | |
58 | #include <sys/ioctl.h> | |
59 | #define MD_MAJOR 9 | |
60 | #define MdpMinorShift 6 | |
61 | ||
62 | #ifndef BLKGETSIZE64 | |
63 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ | |
64 | #endif | |
65 | ||
66 | #define DEFAULT_BITMAP_CHUNK 4096 | |
67 | #define DEFAULT_BITMAP_DELAY 5 | |
68 | #define DEFAULT_MAX_WRITE_BEHIND 256 | |
69 | ||
70 | #include "md_u.h" | |
71 | #include "md_p.h" | |
72 | #include "bitmap.h" | |
73 | ||
74 | /* general information that might be extracted from a superblock */ | |
75 | struct mdinfo { | |
76 | mdu_array_info_t array; | |
77 | mdu_disk_info_t disk; | |
78 | __u64 events; | |
79 | int uuid[4]; | |
80 | }; | |
81 | ||
82 | #define Name "mdadm" | |
83 | ||
84 | enum mode { | |
85 | ASSEMBLE=1, | |
86 | BUILD, | |
87 | CREATE, | |
88 | MANAGE, | |
89 | MISC, | |
90 | MONITOR, | |
91 | GROW, | |
92 | }; | |
93 | ||
94 | extern char short_options[]; | |
95 | extern char short_bitmap_auto_options[]; | |
96 | extern struct option long_options[]; | |
97 | extern char Version[], Usage[], Help[], OptionHelp[], | |
98 | Help_create[], Help_build[], Help_assemble[], Help_grow[], | |
99 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; | |
100 | ||
101 | /* structures read from config file */ | |
102 | /* List of mddevice names and identifiers | |
103 | * Identifiers can be: | |
104 | * uuid=128-hex-uuid | |
105 | * super-minor=decimal-minor-number-from-superblock | |
106 | * devices=comma,separated,list,of,device,names,with,wildcards | |
107 | * | |
108 | * If multiple fields are present, the intersection of all matching | |
109 | * devices is considered | |
110 | */ | |
111 | #define UnSet (0xfffe) | |
112 | typedef struct mddev_ident_s { | |
113 | char *devname; | |
114 | ||
115 | int uuid_set; | |
116 | int uuid[4]; | |
117 | char name[33]; | |
118 | ||
119 | unsigned int super_minor; | |
120 | ||
121 | char *devices; /* comma separated list of device | |
122 | * names with wild cards | |
123 | */ | |
124 | int level; | |
125 | unsigned int raid_disks; | |
126 | unsigned int spare_disks; | |
127 | struct supertype *st; | |
128 | int autof; /* 1 for normal, 2 for partitioned */ | |
129 | char *spare_group; | |
130 | int bitmap_fd; | |
131 | ||
132 | struct mddev_ident_s *next; | |
133 | } *mddev_ident_t; | |
134 | ||
135 | /* List of device names - wildcards expanded */ | |
136 | typedef struct mddev_dev_s { | |
137 | char *devname; | |
138 | char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. | |
139 | * Not set for names read from .config | |
140 | */ | |
141 | char writemostly; | |
142 | char re_add; | |
143 | struct mddev_dev_s *next; | |
144 | } *mddev_dev_t; | |
145 | ||
146 | typedef struct mapping { | |
147 | char *name; | |
148 | int num; | |
149 | } mapping_t; | |
150 | ||
151 | ||
152 | struct mdstat_ent { | |
153 | char *dev; | |
154 | int devnum; | |
155 | int active; | |
156 | char *level; | |
157 | char *pattern; /* U or up, _ for down */ | |
158 | int percent; /* -1 if no resync */ | |
159 | int resync; /* 1 if resync, 0 if recovery */ | |
160 | struct mdstat_ent *next; | |
161 | }; | |
162 | ||
163 | extern struct mdstat_ent *mdstat_read(int); | |
164 | extern void free_mdstat(struct mdstat_ent *ms); | |
165 | extern void mdstat_wait(int seconds); | |
166 | ||
167 | #ifndef Sendmail | |
168 | #define Sendmail "/usr/lib/sendmail -t" | |
169 | #endif | |
170 | ||
171 | #define SYSLOG_FACILITY LOG_DAEMON | |
172 | ||
173 | extern char *map_num(mapping_t *map, int num); | |
174 | extern int map_name(mapping_t *map, char *name); | |
175 | extern mapping_t r5layout[], pers[], modes[], faultylayout[]; | |
176 | ||
177 | extern char *map_dev(int major, int minor); | |
178 | ||
179 | ||
180 | extern struct superswitch { | |
181 | void (*examine_super)(void *sbv); | |
182 | void (*brief_examine_super)(void *sbv); | |
183 | void (*detail_super)(void *sbv); | |
184 | void (*brief_detail_super)(void *sbv); | |
185 | void (*uuid_from_super)(int uuid[4], void *sbv); | |
186 | void (*getinfo_super)(struct mdinfo *info, mddev_ident_t ident, void *sbv); | |
187 | int (*update_super)(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose); | |
188 | __u64 (*event_super)(void *sbv); | |
189 | int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info, char *name); | |
190 | void (*add_to_super)(void *sbv, mdu_disk_info_t *dinfo); | |
191 | int (*store_super)(struct supertype *st, int fd, void *sbv); | |
192 | int (*write_init_super)(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname); | |
193 | int (*compare_super)(void **firstp, void *secondv); | |
194 | int (*load_super)(struct supertype *st, int fd, void **sbp, char *devname); | |
195 | struct supertype * (*match_metadata_desc)(char *arg); | |
196 | __u64 (*avail_size)(struct supertype *st, __u64 size); | |
197 | int (*add_internal_bitmap)(struct supertype *st, void *sbv, int chunk, int delay, int write_behind, | |
198 | unsigned long long size, int may_change, int major); | |
199 | void (*locate_bitmap)(struct supertype *st, int fd, void *sbv); | |
200 | int (*write_bitmap)(struct supertype *st, int fd, void *sbv); | |
201 | int major; | |
202 | int swapuuid; /* true if uuid is bigending rather than hostendian */ | |
203 | } super0, super1, *superlist[]; | |
204 | ||
205 | struct supertype { | |
206 | struct superswitch *ss; | |
207 | int minor_version; | |
208 | int max_devs; | |
209 | }; | |
210 | ||
211 | extern struct supertype *super_by_version(int vers, int minor); | |
212 | extern struct supertype *guess_super(int fd); | |
213 | ||
214 | #if __GNUC__ < 3 | |
215 | struct stat64; | |
216 | #endif | |
217 | ||
218 | #ifdef UCLIBC | |
219 | struct FTW {}; | |
220 | # define FTW_PHYS 1 | |
221 | #else | |
222 | # define __USE_XOPEN_EXTENDED | |
223 | # include <ftw.h> | |
224 | # ifdef __dietlibc__ | |
225 | # define FTW_PHYS 1 | |
226 | # endif | |
227 | #endif | |
228 | ||
229 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); | |
230 | ||
231 | ||
232 | extern int Manage_ro(char *devname, int fd, int readonly); | |
233 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); | |
234 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); | |
235 | extern int Manage_reconfig(char *devname, int fd, int layout); | |
236 | extern int Manage_subdevs(char *devname, int fd, | |
237 | mddev_dev_t devlist, int verbose); | |
238 | extern int Grow_Add_device(char *devname, int fd, char *newdev); | |
239 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind); | |
240 | ||
241 | ||
242 | extern int Assemble(struct supertype *st, char *mddev, int mdfd, | |
243 | mddev_ident_t ident, | |
244 | char *conffile, | |
245 | mddev_dev_t devlist, | |
246 | int readonly, int runstop, | |
247 | char *update, | |
248 | int verbose, int force); | |
249 | ||
250 | extern int Build(char *mddev, int mdfd, int chunk, int level, int layout, | |
251 | int raiddisks, | |
252 | mddev_dev_t devlist, int assume_clean, | |
253 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose); | |
254 | ||
255 | ||
256 | extern int Create(struct supertype *st, char *mddev, int mdfd, | |
257 | int chunk, int level, int layout, unsigned long size, int raiddisks, int sparedisks, | |
258 | char *name, | |
259 | int subdevs, mddev_dev_t devlist, | |
260 | int runstop, int verbose, int force, int assume_clean, | |
261 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay); | |
262 | ||
263 | extern int Detail(char *dev, int brief, int test); | |
264 | extern int Query(char *dev); | |
265 | extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust, | |
266 | struct supertype *forcest); | |
267 | extern int Monitor(mddev_dev_t devlist, | |
268 | char *mailaddr, char *alert_cmd, | |
269 | int period, int daemonise, int scan, int oneshot, | |
270 | int dosyslog, char *config, int test, char *pidfile); | |
271 | ||
272 | extern int Kill(char *dev, int force); | |
273 | ||
274 | extern int CreateBitmap(char *filename, int force, char uuid[16], | |
275 | unsigned long chunksize, unsigned long daemon_sleep, | |
276 | unsigned long write_behind, | |
277 | unsigned long long array_size, | |
278 | int major); | |
279 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); | |
280 | ||
281 | extern int md_get_version(int fd); | |
282 | extern int get_linux_version(void); | |
283 | extern int parse_uuid(char *str, int uuid[4]); | |
284 | extern int check_ext2(int fd, char *name); | |
285 | extern int check_reiser(int fd, char *name); | |
286 | extern int check_raid(int fd, char *name); | |
287 | ||
288 | extern int get_mdp_major(void); | |
289 | extern int dev_open(char *dev, int flags); | |
290 | extern int is_standard(char *dev, int *nump); | |
291 | ||
292 | ||
293 | extern mddev_ident_t conf_get_ident(char *conffile, char *dev); | |
294 | extern mddev_dev_t conf_get_devs(char *conffile); | |
295 | extern char *conf_get_mailaddr(char *conffile); | |
296 | extern char *conf_get_program(char *conffile); | |
297 | extern char *conf_line(FILE *file); | |
298 | extern char *conf_word(FILE *file, int allow_key); | |
299 | extern void free_line(char *line); | |
300 | extern int match_oneof(char *devices, char *devname); | |
301 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); | |
302 | extern int same_uuid(int a[4], int b[4], int swapuuid); | |
303 | /* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/ | |
304 | extern unsigned long calc_csum(void *super, int bytes); | |
305 | extern int enough(int level, int raid_disks, int layout, | |
306 | char *avail, int avail_disks); | |
307 | extern int ask(char *mesg); | |
308 | ||
309 | ||
310 | extern char *human_size(long long bytes); | |
311 | char *human_size_brief(long long bytes); | |
312 | ||
313 | extern void put_md_name(char *name); | |
314 | extern char *get_md_name(int dev); | |
315 | ||
316 | extern char DefaultConfFile[]; | |
317 | ||
318 | extern int open_mddev(char *dev, int autof); | |
319 | ||
320 | ||
321 | #define LEVEL_MULTIPATH (-4) | |
322 | #define LEVEL_LINEAR (-1) | |
323 | #define LEVEL_FAULTY (-5) | |
324 | ||
325 | ||
326 | /* faulty stuff */ | |
327 | ||
328 | #define WriteTransient 0 | |
329 | #define ReadTransient 1 | |
330 | #define WritePersistent 2 | |
331 | #define ReadPersistent 3 | |
332 | #define WriteAll 4 /* doesn't go to device */ | |
333 | #define ReadFixable 5 | |
334 | #define Modes 6 | |
335 | ||
336 | #define ClearErrors 31 | |
337 | #define ClearFaults 30 | |
338 | ||
339 | #define AllPersist 100 /* internal use only */ | |
340 | #define NoPersist 101 | |
341 | ||
342 | #define ModeMask 0x1f | |
343 | #define ModeShift 5 | |
344 | ||
345 | ||
346 | #ifdef __TINYC__ | |
347 | #undef minor | |
348 | #undef major | |
349 | #undef makedev | |
350 | #define minor(x) ((x)&0xff) | |
351 | #define major(x) (((x)>>8)&0xff) | |
352 | #define makedev(M,m) (((M)<<8) | (m)) | |
353 | #endif | |
354 |