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Commit | Line | Data |
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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
4f589ad0 | 4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> |
64c4757e NB |
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 | ||
4ccdb956 | 30 | #define _GNU_SOURCE |
64c4757e | 31 | #include <unistd.h> |
98c6faba | 32 | #ifndef __dietlibc__ |
64c4757e | 33 | extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence)); |
98c6faba | 34 | #endif |
64c4757e NB |
35 | |
36 | #include <sys/types.h> | |
37 | #include <sys/stat.h> | |
38 | #include <stdlib.h> | |
39 | #include <time.h> | |
11018a45 | 40 | #include <sys/time.h> |
64c4757e NB |
41 | #include <getopt.h> |
42 | #include <fcntl.h> | |
43 | #include <stdio.h> | |
44 | #include <errno.h> | |
45 | #include <string.h> | |
773135f5 | 46 | #include <syslog.h> |
b56c3630 NB |
47 | #ifdef __dietlibc__ |
48 | #include <strings.h> | |
98c6faba NB |
49 | #endif |
50 | ||
64c4757e NB |
51 | |
52 | #include <linux/kdev_t.h> | |
e0d19036 NB |
53 | /*#include <linux/fs.h> */ |
54 | #include <sys/mount.h> | |
55 | #include <asm/types.h> | |
64c4757e NB |
56 | #include <sys/ioctl.h> |
57 | #define MD_MAJOR 9 | |
dd0781e5 | 58 | #define MdpMinorShift 6 |
64c4757e | 59 | |
e0d19036 | 60 | #ifndef BLKGETSIZE64 |
98c6faba | 61 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ |
e0d19036 | 62 | #endif |
56eb10c0 | 63 | |
c82f047c NB |
64 | #define DEFAULT_BITMAP_CHUNK 4096 |
65 | #define DEFAULT_BITMAP_DELAY 5 | |
dfd4d8ee | 66 | #define DEFAULT_MAX_WRITE_BEHIND 256 |
64c4757e NB |
67 | |
68 | #include "md_u.h" | |
e0d19036 | 69 | #include "md_p.h" |
c82f047c | 70 | #include "bitmap.h" |
64c4757e | 71 | |
1e0d770c NB |
72 | #include <endian.h> |
73 | /* #include "asm/byteorder.h" Redhat don't like this so... */ | |
74 | #if __BYTE_ORDER == __LITTLE_ENDIAN | |
75 | # include <linux/byteorder/little_endian.h> | |
76 | #elif __BYTE_ORDER == __BIG_ENDIAN | |
77 | # include <linux/byteorder/big_endian.h> | |
78 | #elif __BYTE_ORDER == __PDP_ENDIAN | |
79 | # include <linux/byteorder/pdp_endian.h> | |
80 | #else | |
81 | # error "unknown endianness." | |
82 | #endif | |
83 | ||
84 | ||
85 | ||
4b1ac34b NB |
86 | /* general information that might be extracted from a superblock */ |
87 | struct mdinfo { | |
88 | mdu_array_info_t array; | |
89 | mdu_disk_info_t disk; | |
90 | __u64 events; | |
fbf8a0b7 | 91 | int uuid[4]; |
31317663 | 92 | char name[33]; |
353632d9 NB |
93 | unsigned long long data_offset; |
94 | unsigned long long component_size; | |
95 | int reshape_active; | |
96 | unsigned long long reshape_progress; | |
97 | int new_level, delta_disks, new_layout, new_chunk; | |
4b1ac34b NB |
98 | }; |
99 | ||
5bbb4842 NB |
100 | struct createinfo { |
101 | int uid; | |
102 | int gid; | |
103 | int autof; | |
104 | int mode; | |
105 | }; | |
106 | ||
9a9dab36 | 107 | #define Name "mdadm" |
682c7051 | 108 | |
e0d19036 NB |
109 | enum mode { |
110 | ASSEMBLE=1, | |
111 | BUILD, | |
112 | CREATE, | |
113 | MANAGE, | |
114 | MISC, | |
115 | MONITOR, | |
dd0781e5 | 116 | GROW, |
e0d19036 NB |
117 | }; |
118 | ||
64c4757e | 119 | extern char short_options[]; |
c06487ce | 120 | extern char short_bitmap_auto_options[]; |
64c4757e | 121 | extern struct option long_options[]; |
56eedc1a | 122 | extern char Version[], Usage[], Help[], OptionHelp[], |
dd0781e5 | 123 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
e0d19036 | 124 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 125 | |
997aed5d NB |
126 | /* for option that don't have short equivilents, we assign arbitrary |
127 | * small numbers. '1' means an undecorated option, so we start at '2'. | |
128 | */ | |
129 | enum special_options { | |
130 | AssumeClean = 2, | |
131 | BitmapChunk, | |
132 | WriteBehind, | |
133 | ReAdd, | |
134 | NoDegraded, | |
135 | Sparc22, | |
136 | BackupFile, | |
137 | HomeHost, | |
589395d6 | 138 | AutoHomeHost, |
997aed5d NB |
139 | }; |
140 | ||
64c4757e | 141 | /* structures read from config file */ |
52826846 NB |
142 | /* List of mddevice names and identifiers |
143 | * Identifiers can be: | |
144 | * uuid=128-hex-uuid | |
145 | * super-minor=decimal-minor-number-from-superblock | |
146 | * devices=comma,separated,list,of,device,names,with,wildcards | |
147 | * | |
148 | * If multiple fields are present, the intersection of all matching | |
149 | * devices is considered | |
150 | */ | |
98c6faba | 151 | #define UnSet (0xfffe) |
52826846 | 152 | typedef struct mddev_ident_s { |
dd0781e5 | 153 | char *devname; |
52826846 | 154 | |
dd0781e5 | 155 | int uuid_set; |
3fa06e9d | 156 | int uuid[4]; |
947fd4dd | 157 | char name[33]; |
52826846 | 158 | |
98c6faba | 159 | unsigned int super_minor; |
52826846 | 160 | |
dd0781e5 | 161 | char *devices; /* comma separated list of device |
52826846 NB |
162 | * names with wild cards |
163 | */ | |
dd0781e5 | 164 | int level; |
98c6faba NB |
165 | unsigned int raid_disks; |
166 | unsigned int spare_disks; | |
82d9eba6 | 167 | struct supertype *st; |
dd0781e5 NB |
168 | int autof; /* 1 for normal, 2 for partitioned */ |
169 | char *spare_group; | |
7ef02d01 | 170 | char *bitmap_file; |
c82f047c | 171 | int bitmap_fd; |
dd0781e5 | 172 | |
52826846 NB |
173 | struct mddev_ident_s *next; |
174 | } *mddev_ident_t; | |
64c4757e NB |
175 | |
176 | /* List of device names - wildcards expanded */ | |
177 | typedef struct mddev_dev_s { | |
178 | char *devname; | |
cd29a5c8 NB |
179 | char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. |
180 | * Not set for names read from .config | |
181 | */ | |
dfd4d8ee | 182 | char writemostly; |
fe80f49b | 183 | char re_add; |
811e6cbe | 184 | char used; /* set when used */ |
64c4757e NB |
185 | struct mddev_dev_s *next; |
186 | } *mddev_dev_t; | |
187 | ||
682c7051 NB |
188 | typedef struct mapping { |
189 | char *name; | |
190 | int num; | |
191 | } mapping_t; | |
192 | ||
e0d19036 NB |
193 | |
194 | struct mdstat_ent { | |
195 | char *dev; | |
196 | int devnum; | |
197 | int active; | |
198 | char *level; | |
199 | char *pattern; /* U or up, _ for down */ | |
200 | int percent; /* -1 if no resync */ | |
e5329c37 | 201 | int resync; /* 1 if resync, 0 if recovery */ |
e0d19036 NB |
202 | struct mdstat_ent *next; |
203 | }; | |
204 | ||
22a88995 | 205 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
e0d19036 | 206 | extern void free_mdstat(struct mdstat_ent *ms); |
dd0781e5 | 207 | extern void mdstat_wait(int seconds); |
e0d19036 | 208 | |
e86c9dd6 NB |
209 | /* Data structure for holding info read from sysfs */ |
210 | struct sysdev { | |
211 | char name[20]; | |
212 | int role; | |
213 | int major, minor; | |
214 | unsigned long long offset, size; | |
215 | int state; | |
216 | int errors; | |
217 | struct sysdev *next; | |
218 | }; | |
219 | struct sysarray { | |
220 | char name[20]; | |
221 | struct sysdev *devs; | |
222 | int chunk; | |
223 | unsigned long long component_size; | |
224 | int layout; | |
225 | int level; | |
226 | int spares; | |
227 | }; | |
228 | /* various details can be requested */ | |
229 | #define GET_LEVEL 1 | |
230 | #define GET_LAYOUT 2 | |
231 | #define GET_COMPONENT 4 | |
232 | #define GET_CHUNK 8 | |
233 | ||
234 | #define GET_DEVS 1024 /* gets role, major, minor */ | |
235 | #define GET_OFFSET 2048 | |
236 | #define GET_SIZE 4096 | |
237 | #define GET_STATE 8192 | |
238 | #define GET_ERROR 16384 | |
239 | ||
240 | /* If fd >= 0, get the array it is open on, | |
241 | * else use devnum. >=0 -> major9. <0..... | |
242 | */ | |
243 | extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options); | |
244 | extern int sysfs_set_str(struct sysarray *sra, struct sysdev *dev, | |
245 | char *name, char *val); | |
246 | extern int sysfs_set_num(struct sysarray *sra, struct sysdev *dev, | |
247 | char *name, unsigned long long val); | |
248 | extern int sysfs_get_ll(struct sysarray *sra, struct sysdev *dev, | |
249 | char *name, unsigned long long *val); | |
250 | ||
251 | ||
252 | extern int save_stripes(int *source, unsigned long long *offsets, | |
253 | int raid_disks, int chunk_size, int level, int layout, | |
254 | int nwrites, int *dest, | |
255 | unsigned long long start, unsigned long long length); | |
353632d9 NB |
256 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
257 | int raid_disks, int chunk_size, int level, int layout, | |
258 | int source, unsigned long long read_offset, | |
259 | unsigned long long start, unsigned long long length); | |
e86c9dd6 | 260 | |
52826846 NB |
261 | #ifndef Sendmail |
262 | #define Sendmail "/usr/lib/sendmail -t" | |
263 | #endif | |
264 | ||
773135f5 NB |
265 | #define SYSLOG_FACILITY LOG_DAEMON |
266 | ||
682c7051 NB |
267 | extern char *map_num(mapping_t *map, int num); |
268 | extern int map_name(mapping_t *map, char *name); | |
b5e64645 | 269 | extern mapping_t r5layout[], pers[], modes[], faultylayout[]; |
682c7051 | 270 | |
16c6fa80 | 271 | extern char *map_dev(int major, int minor, int create); |
64c4757e NB |
272 | |
273 | ||
f9ce90ba | 274 | extern struct superswitch { |
a1cbd7d0 | 275 | void (*examine_super)(void *sbv, char *homehost); |
f9ce90ba | 276 | void (*brief_examine_super)(void *sbv); |
b6750aa8 | 277 | void (*detail_super)(void *sbv, char *homehost); |
f9ce90ba NB |
278 | void (*brief_detail_super)(void *sbv); |
279 | void (*uuid_from_super)(int uuid[4], void *sbv); | |
31317663 | 280 | void (*getinfo_super)(struct mdinfo *info, void *sbv); |
83b6208e | 281 | int (*match_home)(void *sbv, char *homehost); |
e5eac01f NB |
282 | int (*update_super)(struct mdinfo *info, void *sbv, char *update, |
283 | char *devname, int verbose, | |
284 | int uuid_set, char *homehost); | |
f9ce90ba | 285 | __u64 (*event_super)(void *sbv); |
05697ec1 | 286 | int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name, char *homehost); |
f9ce90ba | 287 | void (*add_to_super)(void *sbv, mdu_disk_info_t *dinfo); |
96395475 | 288 | int (*store_super)(struct supertype *st, int fd, void *sbv); |
1bf4e2d9 | 289 | int (*write_init_super)(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname); |
f9ce90ba | 290 | int (*compare_super)(void **firstp, void *secondv); |
82d9eba6 NB |
291 | int (*load_super)(struct supertype *st, int fd, void **sbp, char *devname); |
292 | struct supertype * (*match_metadata_desc)(char *arg); | |
1bf4e2d9 | 293 | __u64 (*avail_size)(struct supertype *st, __u64 size); |
f9c25f1d NB |
294 | int (*add_internal_bitmap)(struct supertype *st, void *sbv, int chunk, int delay, int write_behind, |
295 | unsigned long long size, int may_change, int major); | |
f6d75de8 | 296 | void (*locate_bitmap)(struct supertype *st, int fd, void *sbv); |
f5e166fe | 297 | int (*write_bitmap)(struct supertype *st, int fd, void *sbv); |
82d9eba6 | 298 | int major; |
f277ce36 | 299 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
82d9eba6 NB |
300 | } super0, super1, *superlist[]; |
301 | ||
302 | struct supertype { | |
303 | struct superswitch *ss; | |
304 | int minor_version; | |
ea329559 | 305 | int max_devs; |
82d9eba6 | 306 | }; |
f9ce90ba | 307 | |
82d9eba6 NB |
308 | extern struct supertype *super_by_version(int vers, int minor); |
309 | extern struct supertype *guess_super(int fd); | |
f9ce90ba | 310 | |
838acbc2 NB |
311 | #if __GNUC__ < 3 |
312 | struct stat64; | |
313 | #endif | |
314 | ||
173fc515 NB |
315 | #ifdef UCLIBC |
316 | struct FTW {}; | |
317 | # define FTW_PHYS 1 | |
318 | #else | |
173fc515 NB |
319 | # include <ftw.h> |
320 | # ifdef __dietlibc__ | |
321 | # define FTW_PHYS 1 | |
322 | # endif | |
323 | #endif | |
324 | ||
325 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); | |
326 | ||
f9ce90ba | 327 | |
64c4757e | 328 | extern int Manage_ro(char *devname, int fd, int readonly); |
91f068bf | 329 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); |
dd0781e5 | 330 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); |
b5e64645 | 331 | extern int Manage_reconfig(char *devname, int fd, int layout); |
64c4757e | 332 | extern int Manage_subdevs(char *devname, int fd, |
dab6685f | 333 | mddev_dev_t devlist, int verbose); |
e5329c37 | 334 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
8fac0577 | 335 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force); |
06b0d786 | 336 | extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file, |
e86c9dd6 NB |
337 | long long size, |
338 | int level, int layout, int chunksize, int raid_disks); | |
06b0d786 NB |
339 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
340 | int *fdlist, int cnt, char *backup_file); | |
64c4757e NB |
341 | |
342 | ||
82d9eba6 | 343 | extern int Assemble(struct supertype *st, char *mddev, int mdfd, |
52826846 NB |
344 | mddev_ident_t ident, |
345 | char *conffile, | |
06b0d786 | 346 | mddev_dev_t devlist, char *backup_file, |
64c4757e | 347 | int readonly, int runstop, |
e5eac01f | 348 | char *update, char *homehost, |
64c4757e NB |
349 | int verbose, int force); |
350 | ||
b5e64645 | 351 | extern int Build(char *mddev, int mdfd, int chunk, int level, int layout, |
64c4757e | 352 | int raiddisks, |
c82f047c | 353 | mddev_dev_t devlist, int assume_clean, |
dab6685f | 354 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose); |
64c4757e NB |
355 | |
356 | ||
82d9eba6 | 357 | extern int Create(struct supertype *st, char *mddev, int mdfd, |
5dd497ee | 358 | int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, |
05697ec1 | 359 | char *name, char *homehost, |
cd29a5c8 | 360 | int subdevs, mddev_dev_t devlist, |
47d79ef8 | 361 | int runstop, int verbose, int force, int assume_clean, |
dfd4d8ee | 362 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay); |
64c4757e | 363 | |
b6750aa8 | 364 | extern int Detail(char *dev, int brief, int test, char *homehost); |
e0d19036 | 365 | extern int Query(char *dev); |
82d9eba6 | 366 | extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust, |
a1cbd7d0 | 367 | struct supertype *forcest, char *homehost); |
cd29a5c8 | 368 | extern int Monitor(mddev_dev_t devlist, |
e0d19036 | 369 | char *mailaddr, char *alert_cmd, |
aa88f531 | 370 | int period, int daemonise, int scan, int oneshot, |
773135f5 | 371 | int dosyslog, char *config, int test, char *pidfile); |
64c4757e | 372 | |
6409687b | 373 | extern int Kill(char *dev, int force, int quiet); |
9a9dab36 | 374 | |
c82f047c NB |
375 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
376 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 377 | unsigned long write_behind, |
dcec9ee5 NB |
378 | unsigned long long array_size, |
379 | int major); | |
55935d51 | 380 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
8131b493 | 381 | extern void bitmap_update_uuid(int fd, int *uuid); |
c82f047c | 382 | |
64c4757e | 383 | extern int md_get_version(int fd); |
e0d19036 | 384 | extern int get_linux_version(void); |
64c4757e | 385 | extern int parse_uuid(char *str, int uuid[4]); |
682c7051 NB |
386 | extern int check_ext2(int fd, char *name); |
387 | extern int check_reiser(int fd, char *name); | |
388 | extern int check_raid(int fd, char *name); | |
64c4757e | 389 | |
dd0781e5 | 390 | extern int get_mdp_major(void); |
8b0dabea | 391 | extern int dev_open(char *dev, int flags); |
8d80900b | 392 | extern int is_standard(char *dev, int *nump); |
dd0781e5 | 393 | |
f1ae21c4 | 394 | extern int parse_auto(char *str, char *msg, int config); |
e0d19036 NB |
395 | extern mddev_ident_t conf_get_ident(char *conffile, char *dev); |
396 | extern mddev_dev_t conf_get_devs(char *conffile); | |
5bbb4842 | 397 | extern struct createinfo *conf_get_create_info(char *conffile); |
e0d19036 | 398 | extern char *conf_get_mailaddr(char *conffile); |
4948b8f7 | 399 | extern char *conf_get_mailfrom(char *conffile); |
e0d19036 | 400 | extern char *conf_get_program(char *conffile); |
997aed5d | 401 | extern char *conf_get_homehost(char *conffile); |
e0d19036 | 402 | extern char *conf_line(FILE *file); |
98c6faba | 403 | extern char *conf_word(FILE *file, int allow_key); |
e0d19036 NB |
404 | extern void free_line(char *line); |
405 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 406 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
f277ce36 | 407 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
4b1ac34b NB |
408 | /* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/ |
409 | extern unsigned long calc_csum(void *super, int bytes); | |
265e0f17 NB |
410 | extern int enough(int level, int raid_disks, int layout, |
411 | char *avail, int avail_disks); | |
e0d19036 | 412 | extern int ask(char *mesg); |
8fac0577 | 413 | extern unsigned long long get_component_size(int fd); |
e0d19036 | 414 | |
cd29a5c8 | 415 | |
56eb10c0 | 416 | extern char *human_size(long long bytes); |
e0d19036 NB |
417 | char *human_size_brief(long long bytes); |
418 | ||
419 | extern void put_md_name(char *name); | |
420 | extern char *get_md_name(int dev); | |
421 | ||
c913b90e | 422 | extern char DefaultConfFile[]; |
b5e64645 NB |
423 | |
424 | extern int open_mddev(char *dev, int autof); | |
425 | ||
426 | ||
427 | #define LEVEL_MULTIPATH (-4) | |
428 | #define LEVEL_LINEAR (-1) | |
429 | #define LEVEL_FAULTY (-5) | |
430 | ||
431 | ||
432 | /* faulty stuff */ | |
433 | ||
434 | #define WriteTransient 0 | |
435 | #define ReadTransient 1 | |
436 | #define WritePersistent 2 | |
437 | #define ReadPersistent 3 | |
438 | #define WriteAll 4 /* doesn't go to device */ | |
439 | #define ReadFixable 5 | |
440 | #define Modes 6 | |
441 | ||
442 | #define ClearErrors 31 | |
443 | #define ClearFaults 30 | |
444 | ||
445 | #define AllPersist 100 /* internal use only */ | |
446 | #define NoPersist 101 | |
447 | ||
448 | #define ModeMask 0x1f | |
449 | #define ModeShift 5 | |
fe6729fa NB |
450 | |
451 | ||
452 | #ifdef __TINYC__ | |
453 | #undef minor | |
454 | #undef major | |
455 | #undef makedev | |
456 | #define minor(x) ((x)&0xff) | |
457 | #define major(x) (((x)>>8)&0xff) | |
458 | #define makedev(M,m) (((M)<<8) | (m)) | |
459 | #endif | |
460 | ||
e86c9dd6 NB |
461 | /* for raid5 */ |
462 | #define ALGORITHM_LEFT_ASYMMETRIC 0 | |
463 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
464 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
465 | #define ALGORITHM_RIGHT_SYMMETRIC 3 |