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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> |
98c6faba NB |
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 | ||
64c4757e NB |
53 | |
54 | #include <linux/kdev_t.h> | |
e0d19036 NB |
55 | /*#include <linux/fs.h> */ |
56 | #include <sys/mount.h> | |
57 | #include <asm/types.h> | |
64c4757e NB |
58 | #include <sys/ioctl.h> |
59 | #define MD_MAJOR 9 | |
dd0781e5 | 60 | #define MdpMinorShift 6 |
64c4757e | 61 | |
e0d19036 | 62 | #ifndef BLKGETSIZE64 |
98c6faba | 63 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ |
e0d19036 | 64 | #endif |
56eb10c0 | 65 | |
c82f047c NB |
66 | #define DEFAULT_BITMAP_CHUNK 4096 |
67 | #define DEFAULT_BITMAP_DELAY 5 | |
dfd4d8ee | 68 | #define DEFAULT_MAX_WRITE_BEHIND 256 |
64c4757e NB |
69 | |
70 | #include "md_u.h" | |
e0d19036 | 71 | #include "md_p.h" |
c82f047c | 72 | #include "bitmap.h" |
64c4757e | 73 | |
1e0d770c NB |
74 | #include <endian.h> |
75 | /* #include "asm/byteorder.h" Redhat don't like this so... */ | |
76 | #if __BYTE_ORDER == __LITTLE_ENDIAN | |
77 | # include <linux/byteorder/little_endian.h> | |
78 | #elif __BYTE_ORDER == __BIG_ENDIAN | |
79 | # include <linux/byteorder/big_endian.h> | |
80 | #elif __BYTE_ORDER == __PDP_ENDIAN | |
81 | # include <linux/byteorder/pdp_endian.h> | |
82 | #else | |
83 | # error "unknown endianness." | |
84 | #endif | |
85 | ||
86 | ||
87 | ||
4b1ac34b NB |
88 | /* general information that might be extracted from a superblock */ |
89 | struct mdinfo { | |
90 | mdu_array_info_t array; | |
91 | mdu_disk_info_t disk; | |
92 | __u64 events; | |
fbf8a0b7 | 93 | int uuid[4]; |
31317663 | 94 | char name[33]; |
353632d9 NB |
95 | unsigned long long data_offset; |
96 | unsigned long long component_size; | |
97 | int reshape_active; | |
98 | unsigned long long reshape_progress; | |
99 | int new_level, delta_disks, new_layout, new_chunk; | |
4b1ac34b NB |
100 | }; |
101 | ||
5bbb4842 NB |
102 | struct createinfo { |
103 | int uid; | |
104 | int gid; | |
105 | int autof; | |
106 | int mode; | |
107 | }; | |
108 | ||
9a9dab36 | 109 | #define Name "mdadm" |
682c7051 | 110 | |
e0d19036 NB |
111 | enum mode { |
112 | ASSEMBLE=1, | |
113 | BUILD, | |
114 | CREATE, | |
115 | MANAGE, | |
116 | MISC, | |
117 | MONITOR, | |
dd0781e5 | 118 | GROW, |
e0d19036 NB |
119 | }; |
120 | ||
64c4757e | 121 | extern char short_options[]; |
c06487ce | 122 | extern char short_bitmap_auto_options[]; |
64c4757e | 123 | extern struct option long_options[]; |
56eedc1a | 124 | extern char Version[], Usage[], Help[], OptionHelp[], |
dd0781e5 | 125 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
e0d19036 | 126 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 127 | |
997aed5d NB |
128 | /* for option that don't have short equivilents, we assign arbitrary |
129 | * small numbers. '1' means an undecorated option, so we start at '2'. | |
130 | */ | |
131 | enum special_options { | |
132 | AssumeClean = 2, | |
133 | BitmapChunk, | |
134 | WriteBehind, | |
135 | ReAdd, | |
136 | NoDegraded, | |
137 | Sparc22, | |
138 | BackupFile, | |
139 | HomeHost, | |
140 | }; | |
141 | ||
64c4757e | 142 | /* structures read from config file */ |
52826846 NB |
143 | /* List of mddevice names and identifiers |
144 | * Identifiers can be: | |
145 | * uuid=128-hex-uuid | |
146 | * super-minor=decimal-minor-number-from-superblock | |
147 | * devices=comma,separated,list,of,device,names,with,wildcards | |
148 | * | |
149 | * If multiple fields are present, the intersection of all matching | |
150 | * devices is considered | |
151 | */ | |
98c6faba | 152 | #define UnSet (0xfffe) |
52826846 | 153 | typedef struct mddev_ident_s { |
dd0781e5 | 154 | char *devname; |
52826846 | 155 | |
dd0781e5 | 156 | int uuid_set; |
3fa06e9d | 157 | int uuid[4]; |
947fd4dd | 158 | char name[33]; |
52826846 | 159 | |
98c6faba | 160 | unsigned int super_minor; |
52826846 | 161 | |
dd0781e5 | 162 | char *devices; /* comma separated list of device |
52826846 NB |
163 | * names with wild cards |
164 | */ | |
dd0781e5 | 165 | int level; |
98c6faba NB |
166 | unsigned int raid_disks; |
167 | unsigned int spare_disks; | |
82d9eba6 | 168 | struct supertype *st; |
dd0781e5 NB |
169 | int autof; /* 1 for normal, 2 for partitioned */ |
170 | char *spare_group; | |
7ef02d01 | 171 | char *bitmap_file; |
c82f047c | 172 | int bitmap_fd; |
dd0781e5 | 173 | |
52826846 NB |
174 | struct mddev_ident_s *next; |
175 | } *mddev_ident_t; | |
64c4757e NB |
176 | |
177 | /* List of device names - wildcards expanded */ | |
178 | typedef struct mddev_dev_s { | |
179 | char *devname; | |
cd29a5c8 NB |
180 | char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. |
181 | * Not set for names read from .config | |
182 | */ | |
dfd4d8ee | 183 | char writemostly; |
fe80f49b | 184 | char re_add; |
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 NB |
274 | extern struct superswitch { |
275 | void (*examine_super)(void *sbv); | |
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); |
f9ce90ba NB |
281 | int (*update_super)(struct mdinfo *info, void *sbv, char *update, char *devname, int verbose); |
282 | __u64 (*event_super)(void *sbv); | |
05697ec1 | 283 | int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name, char *homehost); |
f9ce90ba | 284 | void (*add_to_super)(void *sbv, mdu_disk_info_t *dinfo); |
96395475 | 285 | int (*store_super)(struct supertype *st, int fd, void *sbv); |
1bf4e2d9 | 286 | int (*write_init_super)(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname); |
f9ce90ba | 287 | int (*compare_super)(void **firstp, void *secondv); |
82d9eba6 NB |
288 | int (*load_super)(struct supertype *st, int fd, void **sbp, char *devname); |
289 | struct supertype * (*match_metadata_desc)(char *arg); | |
1bf4e2d9 | 290 | __u64 (*avail_size)(struct supertype *st, __u64 size); |
f9c25f1d NB |
291 | int (*add_internal_bitmap)(struct supertype *st, void *sbv, int chunk, int delay, int write_behind, |
292 | unsigned long long size, int may_change, int major); | |
f6d75de8 | 293 | void (*locate_bitmap)(struct supertype *st, int fd, void *sbv); |
f5e166fe | 294 | int (*write_bitmap)(struct supertype *st, int fd, void *sbv); |
82d9eba6 | 295 | int major; |
f277ce36 | 296 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
82d9eba6 NB |
297 | } super0, super1, *superlist[]; |
298 | ||
299 | struct supertype { | |
300 | struct superswitch *ss; | |
301 | int minor_version; | |
ea329559 | 302 | int max_devs; |
82d9eba6 | 303 | }; |
f9ce90ba | 304 | |
82d9eba6 NB |
305 | extern struct supertype *super_by_version(int vers, int minor); |
306 | extern struct supertype *guess_super(int fd); | |
f9ce90ba | 307 | |
838acbc2 NB |
308 | #if __GNUC__ < 3 |
309 | struct stat64; | |
310 | #endif | |
311 | ||
173fc515 NB |
312 | #ifdef UCLIBC |
313 | struct FTW {}; | |
314 | # define FTW_PHYS 1 | |
315 | #else | |
173fc515 NB |
316 | # include <ftw.h> |
317 | # ifdef __dietlibc__ | |
318 | # define FTW_PHYS 1 | |
319 | # endif | |
320 | #endif | |
321 | ||
322 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); | |
323 | ||
f9ce90ba | 324 | |
64c4757e | 325 | extern int Manage_ro(char *devname, int fd, int readonly); |
91f068bf | 326 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); |
dd0781e5 | 327 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); |
b5e64645 | 328 | extern int Manage_reconfig(char *devname, int fd, int layout); |
64c4757e | 329 | extern int Manage_subdevs(char *devname, int fd, |
dab6685f | 330 | mddev_dev_t devlist, int verbose); |
e5329c37 | 331 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
8fac0577 | 332 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force); |
06b0d786 | 333 | extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file, |
e86c9dd6 NB |
334 | long long size, |
335 | int level, int layout, int chunksize, int raid_disks); | |
06b0d786 NB |
336 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
337 | int *fdlist, int cnt, char *backup_file); | |
64c4757e NB |
338 | |
339 | ||
82d9eba6 | 340 | extern int Assemble(struct supertype *st, char *mddev, int mdfd, |
52826846 NB |
341 | mddev_ident_t ident, |
342 | char *conffile, | |
06b0d786 | 343 | mddev_dev_t devlist, char *backup_file, |
64c4757e | 344 | int readonly, int runstop, |
5787fa49 | 345 | char *update, |
64c4757e NB |
346 | int verbose, int force); |
347 | ||
b5e64645 | 348 | extern int Build(char *mddev, int mdfd, int chunk, int level, int layout, |
64c4757e | 349 | int raiddisks, |
c82f047c | 350 | mddev_dev_t devlist, int assume_clean, |
dab6685f | 351 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose); |
64c4757e NB |
352 | |
353 | ||
82d9eba6 | 354 | extern int Create(struct supertype *st, char *mddev, int mdfd, |
5dd497ee | 355 | int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, |
05697ec1 | 356 | char *name, char *homehost, |
cd29a5c8 | 357 | int subdevs, mddev_dev_t devlist, |
47d79ef8 | 358 | int runstop, int verbose, int force, int assume_clean, |
dfd4d8ee | 359 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay); |
64c4757e | 360 | |
b6750aa8 | 361 | extern int Detail(char *dev, int brief, int test, char *homehost); |
e0d19036 | 362 | extern int Query(char *dev); |
82d9eba6 NB |
363 | extern int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust, |
364 | struct supertype *forcest); | |
cd29a5c8 | 365 | extern int Monitor(mddev_dev_t devlist, |
e0d19036 | 366 | char *mailaddr, char *alert_cmd, |
aa88f531 | 367 | int period, int daemonise, int scan, int oneshot, |
773135f5 | 368 | int dosyslog, char *config, int test, char *pidfile); |
64c4757e | 369 | |
6409687b | 370 | extern int Kill(char *dev, int force, int quiet); |
9a9dab36 | 371 | |
c82f047c NB |
372 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
373 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 374 | unsigned long write_behind, |
dcec9ee5 NB |
375 | unsigned long long array_size, |
376 | int major); | |
55935d51 | 377 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
8131b493 | 378 | extern void bitmap_update_uuid(int fd, int *uuid); |
c82f047c | 379 | |
64c4757e | 380 | extern int md_get_version(int fd); |
e0d19036 | 381 | extern int get_linux_version(void); |
64c4757e | 382 | extern int parse_uuid(char *str, int uuid[4]); |
682c7051 NB |
383 | extern int check_ext2(int fd, char *name); |
384 | extern int check_reiser(int fd, char *name); | |
385 | extern int check_raid(int fd, char *name); | |
64c4757e | 386 | |
dd0781e5 | 387 | extern int get_mdp_major(void); |
8b0dabea | 388 | extern int dev_open(char *dev, int flags); |
8d80900b | 389 | extern int is_standard(char *dev, int *nump); |
dd0781e5 | 390 | |
f1ae21c4 | 391 | extern int parse_auto(char *str, char *msg, int config); |
e0d19036 NB |
392 | extern mddev_ident_t conf_get_ident(char *conffile, char *dev); |
393 | extern mddev_dev_t conf_get_devs(char *conffile); | |
5bbb4842 | 394 | extern struct createinfo *conf_get_create_info(char *conffile); |
e0d19036 | 395 | extern char *conf_get_mailaddr(char *conffile); |
4948b8f7 | 396 | extern char *conf_get_mailfrom(char *conffile); |
e0d19036 | 397 | extern char *conf_get_program(char *conffile); |
997aed5d | 398 | extern char *conf_get_homehost(char *conffile); |
e0d19036 | 399 | extern char *conf_line(FILE *file); |
98c6faba | 400 | extern char *conf_word(FILE *file, int allow_key); |
e0d19036 NB |
401 | extern void free_line(char *line); |
402 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 403 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
f277ce36 | 404 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
4b1ac34b NB |
405 | /* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/ |
406 | extern unsigned long calc_csum(void *super, int bytes); | |
265e0f17 NB |
407 | extern int enough(int level, int raid_disks, int layout, |
408 | char *avail, int avail_disks); | |
e0d19036 | 409 | extern int ask(char *mesg); |
8fac0577 | 410 | extern unsigned long long get_component_size(int fd); |
e0d19036 | 411 | |
cd29a5c8 | 412 | |
56eb10c0 | 413 | extern char *human_size(long long bytes); |
e0d19036 NB |
414 | char *human_size_brief(long long bytes); |
415 | ||
416 | extern void put_md_name(char *name); | |
417 | extern char *get_md_name(int dev); | |
418 | ||
c913b90e | 419 | extern char DefaultConfFile[]; |
b5e64645 NB |
420 | |
421 | extern int open_mddev(char *dev, int autof); | |
422 | ||
423 | ||
424 | #define LEVEL_MULTIPATH (-4) | |
425 | #define LEVEL_LINEAR (-1) | |
426 | #define LEVEL_FAULTY (-5) | |
427 | ||
428 | ||
429 | /* faulty stuff */ | |
430 | ||
431 | #define WriteTransient 0 | |
432 | #define ReadTransient 1 | |
433 | #define WritePersistent 2 | |
434 | #define ReadPersistent 3 | |
435 | #define WriteAll 4 /* doesn't go to device */ | |
436 | #define ReadFixable 5 | |
437 | #define Modes 6 | |
438 | ||
439 | #define ClearErrors 31 | |
440 | #define ClearFaults 30 | |
441 | ||
442 | #define AllPersist 100 /* internal use only */ | |
443 | #define NoPersist 101 | |
444 | ||
445 | #define ModeMask 0x1f | |
446 | #define ModeShift 5 | |
fe6729fa NB |
447 | |
448 | ||
449 | #ifdef __TINYC__ | |
450 | #undef minor | |
451 | #undef major | |
452 | #undef makedev | |
453 | #define minor(x) ((x)&0xff) | |
454 | #define major(x) (((x)>>8)&0xff) | |
455 | #define makedev(M,m) (((M)<<8) | (m)) | |
456 | #endif | |
457 | ||
e86c9dd6 NB |
458 | /* for raid5 */ |
459 | #define ALGORITHM_LEFT_ASYMMETRIC 0 | |
460 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
461 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
462 | #define ALGORITHM_RIGHT_SYMMETRIC 3 |