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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
e736b623 | 4 | * Copyright (C) 2001-2009 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 | |
e736b623 | 22 | * Email: <neilb@suse.de> |
64c4757e NB |
23 | */ |
24 | ||
4ccdb956 | 25 | #define _GNU_SOURCE |
c2c9bb6f | 26 | #define _FILE_OFFSET_BITS 64 |
64c4757e | 27 | #include <unistd.h> |
e39b673e | 28 | #if !defined(__dietlibc__) && !defined(__KLIBC__) |
64c4757e | 29 | extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence)); |
f783ca4f | 30 | #else |
fffdbe5e | 31 | # if defined(__NO_STAT64) || __WORDSIZE != 32 |
f783ca4f NB |
32 | # define lseek64 lseek |
33 | # endif | |
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> | |
280a927d NB |
49 | /* dietlibc has deprecated random and srandom!! */ |
50 | #define random rand | |
51 | #define srandom srand | |
98c6faba NB |
52 | #endif |
53 | ||
64c4757e NB |
54 | |
55 | #include <linux/kdev_t.h> | |
e0d19036 NB |
56 | /*#include <linux/fs.h> */ |
57 | #include <sys/mount.h> | |
58 | #include <asm/types.h> | |
64c4757e NB |
59 | #include <sys/ioctl.h> |
60 | #define MD_MAJOR 9 | |
dd0781e5 | 61 | #define MdpMinorShift 6 |
64c4757e | 62 | |
e0d19036 | 63 | #ifndef BLKGETSIZE64 |
98c6faba | 64 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ |
e0d19036 | 65 | #endif |
56eb10c0 | 66 | |
c82f047c NB |
67 | #define DEFAULT_BITMAP_CHUNK 4096 |
68 | #define DEFAULT_BITMAP_DELAY 5 | |
dfd4d8ee | 69 | #define DEFAULT_MAX_WRITE_BEHIND 256 |
64c4757e | 70 | |
c132678b LB |
71 | /* VAR_RUN is where pid and socket files used for communicating |
72 | * with mdmon normally live. It should be /var/run, but if | |
73 | * it is too hard to remount /var/run as read-only rather than | |
74 | * unmounting it at shutdown time, then it should be | |
75 | * redefined to some place that comfortably persists until | |
76 | * final shutdown, possibly in /dev if that is a tmpfs. | |
77 | * Note: VAR_RUN does not need to be writable at shutdown, | |
78 | * only during boot when "mdmon --takeover" is run. | |
79 | */ | |
80 | #ifndef VAR_RUN | |
5d4d1b26 | 81 | #define VAR_RUN "/var/run/mdadm" |
c132678b | 82 | #endif /* VAR_RUN */ |
5d4d1b26 N |
83 | /* ALT_RUN should be somewhere that persists across the pivotroot |
84 | * from early boot to late boot. | |
85 | * If you don't have /lib/init/rw you might want to use /dev/.something | |
86 | */ | |
87 | #ifndef ALT_RUN | |
88 | #define ALT_RUN "/lib/init/rw/mdadm" | |
89 | #endif /* ALT_RUN */ | |
90 | ||
64c4757e | 91 | #include "md_u.h" |
e0d19036 | 92 | #include "md_p.h" |
c82f047c | 93 | #include "bitmap.h" |
f7dd881f | 94 | #include "msg.h" |
64c4757e | 95 | |
1e0d770c | 96 | #include <endian.h> |
efd441d1 NB |
97 | /* Redhat don't like to #include <asm/byteorder.h>, and |
98 | * some time include <linux/byteorder/xxx_endian.h> isn't enough, | |
99 | * and there is no standard conversion function so... */ | |
0ae03b8a NB |
100 | /* And dietlibc doesn't think byteswap is ok, so.. */ |
101 | /* #include <byteswap.h> */ | |
102 | #define bswap_16(x) (((x) & 0x00ffU) << 8 | \ | |
103 | ((x) & 0xff00U) >> 8) | |
104 | #define bswap_32(x) (((x) & 0x000000ffU) << 24 | \ | |
105 | ((x) & 0xff000000U) >> 24 | \ | |
106 | ((x) & 0x0000ff00U) << 8 | \ | |
107 | ((x) & 0x00ff0000U) >> 8) | |
108 | #define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \ | |
109 | ((x) & 0xff00000000000000ULL) >> 56 | \ | |
110 | ((x) & 0x000000000000ff00ULL) << 40 | \ | |
111 | ((x) & 0x00ff000000000000ULL) >> 40 | \ | |
112 | ((x) & 0x0000000000ff0000ULL) << 24 | \ | |
113 | ((x) & 0x0000ff0000000000ULL) >> 24 | \ | |
114 | ((x) & 0x00000000ff000000ULL) << 8 | \ | |
115 | ((x) & 0x000000ff00000000ULL) >> 8) | |
116 | ||
e39b673e | 117 | #if !defined(__KLIBC__) |
efd441d1 NB |
118 | #if BYTE_ORDER == LITTLE_ENDIAN |
119 | #define __cpu_to_le16(_x) (_x) | |
120 | #define __cpu_to_le32(_x) (_x) | |
121 | #define __cpu_to_le64(_x) (_x) | |
122 | #define __le16_to_cpu(_x) (_x) | |
123 | #define __le32_to_cpu(_x) (_x) | |
124 | #define __le64_to_cpu(_x) (_x) | |
974e620d NB |
125 | |
126 | #define __cpu_to_be16(_x) bswap_16(_x) | |
127 | #define __cpu_to_be32(_x) bswap_32(_x) | |
128 | #define __cpu_to_be64(_x) bswap_64(_x) | |
129 | #define __be16_to_cpu(_x) bswap_16(_x) | |
130 | #define __be32_to_cpu(_x) bswap_32(_x) | |
131 | #define __be64_to_cpu(_x) bswap_64(_x) | |
efd441d1 NB |
132 | #elif BYTE_ORDER == BIG_ENDIAN |
133 | #define __cpu_to_le16(_x) bswap_16(_x) | |
134 | #define __cpu_to_le32(_x) bswap_32(_x) | |
135 | #define __cpu_to_le64(_x) bswap_64(_x) | |
136 | #define __le16_to_cpu(_x) bswap_16(_x) | |
137 | #define __le32_to_cpu(_x) bswap_32(_x) | |
138 | #define __le64_to_cpu(_x) bswap_64(_x) | |
974e620d NB |
139 | |
140 | #define __cpu_to_be16(_x) (_x) | |
141 | #define __cpu_to_be32(_x) (_x) | |
142 | #define __cpu_to_be64(_x) (_x) | |
143 | #define __be16_to_cpu(_x) (_x) | |
144 | #define __be32_to_cpu(_x) (_x) | |
145 | #define __be64_to_cpu(_x) (_x) | |
1e0d770c NB |
146 | #else |
147 | # error "unknown endianness." | |
148 | #endif | |
e39b673e | 149 | #endif /* __KLIBC__ */ |
1e0d770c NB |
150 | |
151 | ||
1e5c6983 DW |
152 | /* |
153 | * min()/max()/clamp() macros that also do | |
154 | * strict type-checking.. See the | |
155 | * "unnecessary" pointer comparison. | |
156 | */ | |
157 | #define min(x, y) ({ \ | |
158 | typeof(x) _min1 = (x); \ | |
159 | typeof(y) _min2 = (y); \ | |
160 | (void) (&_min1 == &_min2); \ | |
161 | _min1 < _min2 ? _min1 : _min2; }) | |
162 | ||
163 | #define max(x, y) ({ \ | |
164 | typeof(x) _max1 = (x); \ | |
165 | typeof(y) _max2 = (y); \ | |
166 | (void) (&_max1 == &_max2); \ | |
167 | _max1 > _max2 ? _max1 : _max2; }) | |
1e0d770c | 168 | |
4b1ac34b NB |
169 | /* general information that might be extracted from a superblock */ |
170 | struct mdinfo { | |
171 | mdu_array_info_t array; | |
172 | mdu_disk_info_t disk; | |
173 | __u64 events; | |
fbf8a0b7 | 174 | int uuid[4]; |
31317663 | 175 | char name[33]; |
353632d9 | 176 | unsigned long long data_offset; |
598f0d58 NB |
177 | unsigned long long component_size; /* same as array.size, except in |
178 | * sectors and up to 64bits. | |
179 | */ | |
da9b4a62 DW |
180 | unsigned long long custom_array_size; /* size for non-default sized |
181 | * arrays (in sectors) | |
182 | */ | |
353632d9 NB |
183 | int reshape_active; |
184 | unsigned long long reshape_progress; | |
e1516be1 DW |
185 | union { |
186 | unsigned long long resync_start; /* per-array resync position */ | |
187 | unsigned long long recovery_start; /* per-device rebuild position */ | |
b7528a20 | 188 | #define MaxSector (~0ULL) /* resync/recovery complete position */ |
e1516be1 | 189 | }; |
a67dd8cc | 190 | unsigned long safe_mode_delay; /* ms delay to mark clean */ |
353632d9 | 191 | int new_level, delta_disks, new_layout, new_chunk; |
06c7f68e | 192 | int errors; |
7e0f6979 NB |
193 | int cache_size; /* size of raid456 stripe cache*/ |
194 | int mismatch_cnt; | |
195 | char text_version[50]; | |
6e46bf34 DW |
196 | void *update_private; /* for passing metadata-format |
197 | * specific update data | |
198 | * between successive calls to | |
199 | * update_super() | |
200 | */ | |
dd15dc4a NB |
201 | |
202 | int container_member; /* for assembling external-metatdata arrays | |
203 | * This is to be used internally by metadata | |
204 | * handler only */ | |
06c7f68e NB |
205 | |
206 | char sys_name[20]; | |
7e0f6979 | 207 | struct mdinfo *devs; |
06c7f68e | 208 | struct mdinfo *next; |
549e9569 NB |
209 | |
210 | /* Device info for mdmon: */ | |
e1516be1 | 211 | int recovery_fd; |
549e9569 | 212 | int state_fd; |
8d45d196 DW |
213 | #define DS_FAULTY 1 |
214 | #define DS_INSYNC 2 | |
215 | #define DS_WRITE_MOSTLY 4 | |
216 | #define DS_SPARE 8 | |
217 | #define DS_BLOCKED 16 | |
218 | #define DS_REMOVE 1024 | |
92967543 | 219 | #define DS_UNBLOCK 2048 |
549e9569 NB |
220 | int prev_state, curr_state, next_state; |
221 | ||
4b1ac34b NB |
222 | }; |
223 | ||
5bbb4842 NB |
224 | struct createinfo { |
225 | int uid; | |
226 | int gid; | |
227 | int autof; | |
228 | int mode; | |
38098016 | 229 | int symlinks; |
058574b1 | 230 | struct supertype *supertype; |
5bbb4842 NB |
231 | }; |
232 | ||
9a9dab36 | 233 | #define Name "mdadm" |
682c7051 | 234 | |
e0d19036 NB |
235 | enum mode { |
236 | ASSEMBLE=1, | |
237 | BUILD, | |
238 | CREATE, | |
239 | MANAGE, | |
240 | MISC, | |
241 | MONITOR, | |
dd0781e5 | 242 | GROW, |
8382f19b | 243 | INCREMENTAL, |
1f48664b | 244 | AUTODETECT, |
e0d19036 NB |
245 | }; |
246 | ||
64c4757e | 247 | extern char short_options[]; |
024768c4 | 248 | extern char short_bitmap_options[]; |
c06487ce | 249 | extern char short_bitmap_auto_options[]; |
64c4757e | 250 | extern struct option long_options[]; |
56eedc1a | 251 | extern char Version[], Usage[], Help[], OptionHelp[], |
dd0781e5 | 252 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
8382f19b | 253 | Help_incr[], |
e0d19036 | 254 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 255 | |
997aed5d NB |
256 | /* for option that don't have short equivilents, we assign arbitrary |
257 | * small numbers. '1' means an undecorated option, so we start at '2'. | |
258 | */ | |
259 | enum special_options { | |
260 | AssumeClean = 2, | |
261 | BitmapChunk, | |
262 | WriteBehind, | |
263 | ReAdd, | |
264 | NoDegraded, | |
265 | Sparc22, | |
266 | BackupFile, | |
267 | HomeHost, | |
589395d6 | 268 | AutoHomeHost, |
38098016 | 269 | Symlinks, |
1f48664b | 270 | AutoDetect, |
1770662b | 271 | Waitclean, |
4cce4069 | 272 | DetailPlatform, |
997aed5d NB |
273 | }; |
274 | ||
64c4757e | 275 | /* structures read from config file */ |
52826846 NB |
276 | /* List of mddevice names and identifiers |
277 | * Identifiers can be: | |
278 | * uuid=128-hex-uuid | |
279 | * super-minor=decimal-minor-number-from-superblock | |
280 | * devices=comma,separated,list,of,device,names,with,wildcards | |
281 | * | |
282 | * If multiple fields are present, the intersection of all matching | |
283 | * devices is considered | |
284 | */ | |
98c6faba | 285 | #define UnSet (0xfffe) |
52826846 | 286 | typedef struct mddev_ident_s { |
dd0781e5 | 287 | char *devname; |
aba69144 | 288 | |
dd0781e5 | 289 | int uuid_set; |
3fa06e9d | 290 | int uuid[4]; |
947fd4dd | 291 | char name[33]; |
52826846 | 292 | |
98c6faba | 293 | unsigned int super_minor; |
52826846 | 294 | |
dd0781e5 | 295 | char *devices; /* comma separated list of device |
52826846 NB |
296 | * names with wild cards |
297 | */ | |
dd0781e5 | 298 | int level; |
98c6faba NB |
299 | unsigned int raid_disks; |
300 | unsigned int spare_disks; | |
82d9eba6 | 301 | struct supertype *st; |
dd0781e5 NB |
302 | int autof; /* 1 for normal, 2 for partitioned */ |
303 | char *spare_group; | |
7ef02d01 | 304 | char *bitmap_file; |
c82f047c | 305 | int bitmap_fd; |
dd0781e5 | 306 | |
1771a6e2 N |
307 | char *container; /* /dev/whatever name of container, or |
308 | * uuid of container. You would expect | |
309 | * this to be the 'devname' or UUID | |
dbb44303 N |
310 | * of some other entry. |
311 | */ | |
312 | char *member; /* subarray within a container */ | |
313 | ||
52826846 | 314 | struct mddev_ident_s *next; |
b179246f N |
315 | union { |
316 | /* fields needed by different users of this structure */ | |
317 | int assembled; /* set when assembly succeeds */ | |
318 | }; | |
52826846 | 319 | } *mddev_ident_t; |
64c4757e NB |
320 | |
321 | /* List of device names - wildcards expanded */ | |
322 | typedef struct mddev_dev_s { | |
323 | char *devname; | |
cd29a5c8 NB |
324 | char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. |
325 | * Not set for names read from .config | |
326 | */ | |
b3d31955 | 327 | char writemostly; /* 1 for 'set writemostly', 2 for 'clear writemostly' */ |
fe80f49b | 328 | char re_add; |
811e6cbe | 329 | char used; /* set when used */ |
9008ed1c N |
330 | struct mdinfo *content; /* If devname is a container, this might list |
331 | * the remaining member arrays. */ | |
64c4757e NB |
332 | struct mddev_dev_s *next; |
333 | } *mddev_dev_t; | |
334 | ||
682c7051 NB |
335 | typedef struct mapping { |
336 | char *name; | |
337 | int num; | |
338 | } mapping_t; | |
339 | ||
e0d19036 NB |
340 | |
341 | struct mdstat_ent { | |
342 | char *dev; | |
343 | int devnum; | |
344 | int active; | |
345 | char *level; | |
346 | char *pattern; /* U or up, _ for down */ | |
347 | int percent; /* -1 if no resync */ | |
e5329c37 | 348 | int resync; /* 1 if resync, 0 if recovery */ |
549e9569 NB |
349 | int devcnt; |
350 | int raid_disks; | |
351 | int chunk_size; | |
352 | char * metadata_version; | |
e0d19036 NB |
353 | struct mdstat_ent *next; |
354 | }; | |
355 | ||
22a88995 | 356 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
e0d19036 | 357 | extern void free_mdstat(struct mdstat_ent *ms); |
dd0781e5 | 358 | extern void mdstat_wait(int seconds); |
58a4ba2a | 359 | extern void mdstat_wait_fd(int fd, const sigset_t *sigmask); |
8382f19b NB |
360 | extern int mddev_busy(int devnum); |
361 | ||
362 | struct map_ent { | |
363 | struct map_ent *next; | |
364 | int devnum; | |
1522c538 | 365 | char metadata[20]; |
8382f19b | 366 | int uuid[4]; |
195254b8 | 367 | int bad; |
8382f19b NB |
368 | char *path; |
369 | }; | |
1522c538 | 370 | extern int map_update(struct map_ent **mpp, int devnum, char *metadata, |
8382f19b NB |
371 | int uuid[4], char *path); |
372 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); | |
f2e55ecc N |
373 | extern struct map_ent *map_by_devnum(struct map_ent **map, int devnum); |
374 | extern struct map_ent *map_by_name(struct map_ent **map, char *name); | |
8382f19b NB |
375 | extern void map_read(struct map_ent **melp); |
376 | extern int map_write(struct map_ent *mel); | |
377 | extern void map_delete(struct map_ent **mapp, int devnum); | |
378 | extern void map_free(struct map_ent *map); | |
379 | extern void map_add(struct map_ent **melp, | |
1522c538 | 380 | int devnum, char *metadata, int uuid[4], char *path); |
ad5bc697 N |
381 | extern int map_lock(struct map_ent **melp); |
382 | extern void map_unlock(struct map_ent **melp); | |
e0d19036 | 383 | |
e86c9dd6 | 384 | /* various details can be requested */ |
dab4a513 DW |
385 | enum sysfs_read_flags { |
386 | GET_LEVEL = (1 << 0), | |
387 | GET_LAYOUT = (1 << 1), | |
388 | GET_COMPONENT = (1 << 2), | |
389 | GET_CHUNK = (1 << 3), | |
390 | GET_CACHE = (1 << 4), | |
391 | GET_MISMATCH = (1 << 5), | |
392 | GET_VERSION = (1 << 6), | |
393 | GET_DISKS = (1 << 7), | |
394 | GET_DEGRADED = (1 << 8), | |
395 | GET_SAFEMODE = (1 << 9), | |
396 | GET_DEVS = (1 << 10), /* gets role, major, minor */ | |
397 | GET_OFFSET = (1 << 11), | |
398 | GET_SIZE = (1 << 12), | |
399 | GET_STATE = (1 << 13), | |
400 | GET_ERROR = (1 << 14), | |
401 | SKIP_GONE_DEVS = (1 << 15), | |
402 | }; | |
e86c9dd6 NB |
403 | |
404 | /* If fd >= 0, get the array it is open on, | |
405 | * else use devnum. >=0 -> major9. <0..... | |
406 | */ | |
549e9569 | 407 | extern int sysfs_open(int devnum, char *devname, char *attr); |
f35f2525 | 408 | extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum); |
7e0f6979 NB |
409 | extern void sysfs_free(struct mdinfo *sra); |
410 | extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options); | |
1770662b DW |
411 | extern int sysfs_attr_match(const char *attr, const char *str); |
412 | extern int sysfs_match_word(const char *word, char **list); | |
7e0f6979 | 413 | extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 414 | char *name, char *val); |
7e0f6979 | 415 | extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 416 | char *name, unsigned long long val); |
97590376 | 417 | extern int sysfs_uevent(struct mdinfo *sra, char *event); |
7236ee7a N |
418 | extern int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev, |
419 | char *name); | |
420 | extern int sysfs_fd_get_ll(int fd, unsigned long long *val); | |
7e0f6979 | 421 | extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 422 | char *name, unsigned long long *val); |
7236ee7a | 423 | extern int sysfs_fd_get_str(int fd, char *val, int size); |
93ecfa01 N |
424 | extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
425 | char *name, char *val, int size); | |
8ed3e5e1 | 426 | extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms); |
f35f2525 | 427 | extern int sysfs_set_array(struct mdinfo *info, int vers); |
2904b26f | 428 | extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume); |
f1665f72 | 429 | extern int sysfs_disk_to_scsi_id(int fd, __u32 *id); |
f94d52f4 | 430 | extern int sysfs_unique_holder(int devnum, long rdev); |
c69b251b | 431 | extern int load_sys(char *path, char *buf); |
e86c9dd6 NB |
432 | |
433 | ||
434 | extern int save_stripes(int *source, unsigned long long *offsets, | |
435 | int raid_disks, int chunk_size, int level, int layout, | |
436 | int nwrites, int *dest, | |
a6288483 N |
437 | unsigned long long start, unsigned long long length, |
438 | char *buf); | |
353632d9 NB |
439 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
440 | int raid_disks, int chunk_size, int level, int layout, | |
441 | int source, unsigned long long read_offset, | |
442 | unsigned long long start, unsigned long long length); | |
e86c9dd6 | 443 | |
52826846 NB |
444 | #ifndef Sendmail |
445 | #define Sendmail "/usr/lib/sendmail -t" | |
446 | #endif | |
447 | ||
773135f5 NB |
448 | #define SYSLOG_FACILITY LOG_DAEMON |
449 | ||
682c7051 NB |
450 | extern char *map_num(mapping_t *map, int num); |
451 | extern int map_name(mapping_t *map, char *name); | |
b640a252 | 452 | extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[]; |
682c7051 | 453 | |
16c6fa80 | 454 | extern char *map_dev(int major, int minor, int create); |
64c4757e | 455 | |
549e9569 | 456 | struct active_array; |
2e735d19 | 457 | struct metadata_update; |
64c4757e | 458 | |
6adfd3af NB |
459 | /* A superswitch provides entry point the a metadata handler. |
460 | * | |
461 | * The super_switch primarily operates on some "metadata" that | |
462 | * is accessed via the 'supertype'. | |
463 | * This metadata has one of three possible sources. | |
464 | * 1/ It is read from a single device. In this case it may not completely | |
465 | * describe the array or arrays as some information might be on other | |
466 | * devices. | |
467 | * 2/ It is read from all devices in a container. In this case all | |
468 | * information is present. | |
469 | * 3/ It is created by ->init_super / ->add_to_super. In this case it will | |
470 | * be complete once enough ->add_to_super calls have completed. | |
471 | * | |
472 | * When creating an array inside a container, the metadata will be | |
473 | * formed by a combination of 2 and 3. The metadata or the array is read, | |
474 | * then new information is added. | |
475 | * | |
476 | * The metadata must sometimes have a concept of a 'current' array | |
477 | * and a 'current' device. | |
478 | * The 'current' array is set by init_super to be the newly created array, | |
479 | * or is set by super_by_fd when it finds it is looking at an array inside | |
480 | * a container. | |
481 | * | |
482 | * The 'current' device is either the device that the metadata was read from | |
483 | * in case 1, or the last device added by add_to_super in case 3. | |
484 | * Case 2 does not identify a 'current' device. | |
485 | */ | |
f9ce90ba | 486 | extern struct superswitch { |
6adfd3af NB |
487 | |
488 | /* Used to report details of metadata read from a component | |
489 | * device. ->load_super has been called. | |
490 | */ | |
3da92f27 | 491 | void (*examine_super)(struct supertype *st, char *homehost); |
061f2c6a | 492 | void (*brief_examine_super)(struct supertype *st, int verbose); |
4737ae25 | 493 | void (*brief_examine_subarrays)(struct supertype *st, int verbose); |
0d726f17 | 494 | void (*export_examine_super)(struct supertype *st); |
6adfd3af NB |
495 | |
496 | /* Used to report details of an active array. | |
497 | * ->load_super was possibly given a 'component' string. | |
498 | */ | |
3da92f27 | 499 | void (*detail_super)(struct supertype *st, char *homehost); |
3da92f27 | 500 | void (*brief_detail_super)(struct supertype *st); |
0d726f17 | 501 | void (*export_detail_super)(struct supertype *st); |
6adfd3af | 502 | |
4cce4069 | 503 | /* Optional: platform hardware / firmware details */ |
5615172f | 504 | int (*detail_platform)(int verbose, int enumerate_only); |
4cce4069 | 505 | |
6adfd3af NB |
506 | /* Used: |
507 | * to get uuid to storing in bitmap metadata | |
508 | * and 'reshape' backup-data metadata | |
509 | * To see if a device is being re-added to an array it was part of. | |
510 | */ | |
3da92f27 | 511 | void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
6adfd3af | 512 | |
8592f29d | 513 | /* Extract generic details from metadata. This could be details about |
6adfd3af NB |
514 | * the container, or about an individual array within the container. |
515 | * The determination is made either by: | |
516 | * load_super being given a 'component' string. | |
517 | * validate_geometry determining what to create. | |
d2ca6449 NB |
518 | * The info includes both array information and device information. |
519 | * The particular device should be: | |
520 | * The last device added by add_to_super | |
521 | * The device the metadata was loaded from by load_super | |
6adfd3af | 522 | */ |
3da92f27 | 523 | void (*getinfo_super)(struct supertype *st, struct mdinfo *info); |
6adfd3af NB |
524 | |
525 | /* Check if the given metadata is flagged as belonging to "this" | |
9362c1c8 | 526 | * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost" |
6adfd3af | 527 | */ |
3da92f27 | 528 | int (*match_home)(struct supertype *st, char *homehost); |
6adfd3af NB |
529 | |
530 | /* Make one of several generic modifications to metadata | |
531 | * prior to assembly (or other times). | |
532 | * sparc2.2 - first bug in early 0.90 metadata | |
533 | * super-minor - change name of 0.90 metadata | |
534 | * summaries - 'correct' any redundant data | |
535 | * resync - mark array as dirty to trigger a resync. | |
536 | * uuid - set new uuid - only 0.90 or 1.x | |
537 | * name - change the name of the array (where supported) | |
538 | * homehost - change which host this array is tied to. | |
539 | * devicesize - If metadata is at start of device, change recorded | |
540 | * device size to match actual device size | |
541 | * byteorder - swap bytes for 0.90 metadata | |
542 | * | |
543 | * force-one - mark that device as uptodate, not old or failed. | |
544 | * force-array - mark array as clean if it would not otherwise | |
545 | * assemble | |
546 | * assemble - not sure how this is different from force-one... | |
547 | * linear-grow-new - add a new device to a linear array, but don't | |
548 | * change the size: so superblock still matches | |
549 | * linear-grow-update - now change the size of the array. | |
550 | */ | |
68c7d6d7 | 551 | int (*update_super)(struct supertype *st, struct mdinfo *info, |
3da92f27 | 552 | char *update, |
e5eac01f NB |
553 | char *devname, int verbose, |
554 | int uuid_set, char *homehost); | |
6adfd3af NB |
555 | |
556 | /* Create new metadata for new array as described. This could | |
557 | * be a new container, or an array in a pre-existing container. | |
558 | * Also used to zero metadata prior to writing it to invalidate old | |
559 | * metadata. | |
560 | */ | |
3da92f27 NB |
561 | int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
562 | unsigned long long size, char *name, | |
563 | char *homehost, int *uuid); | |
6adfd3af NB |
564 | |
565 | /* update the metadata to include new device, either at create or | |
566 | * when hot-adding a spare. | |
567 | */ | |
f20c3968 | 568 | int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
111d01fc | 569 | int fd, char *devname); |
6adfd3af NB |
570 | |
571 | /* Write metadata to one device when fixing problems or adding | |
572 | * a new device. | |
573 | */ | |
3da92f27 | 574 | int (*store_super)(struct supertype *st, int fd); |
6adfd3af NB |
575 | |
576 | /* Write all metadata for this array. | |
577 | */ | |
111d01fc | 578 | int (*write_init_super)(struct supertype *st); |
64557c33 | 579 | int (*compare_super)(struct supertype *st, struct supertype *tst); |
3da92f27 | 580 | int (*load_super)(struct supertype *st, int fd, char *devname); |
82d9eba6 | 581 | struct supertype * (*match_metadata_desc)(char *arg); |
1bf4e2d9 | 582 | __u64 (*avail_size)(struct supertype *st, __u64 size); |
3da92f27 | 583 | int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
199171a2 | 584 | int delay, int write_behind, |
f9c25f1d | 585 | unsigned long long size, int may_change, int major); |
3da92f27 NB |
586 | void (*locate_bitmap)(struct supertype *st, int fd); |
587 | int (*write_bitmap)(struct supertype *st, int fd); | |
588 | void (*free_super)(struct supertype *st); | |
78e44928 NB |
589 | |
590 | /* validate_geometry is called with an st returned by | |
591 | * match_metadata_desc. | |
592 | * It should check that the geometry described in compatible with | |
593 | * the metadata type. It will be called repeatedly as devices | |
594 | * added to validate changing size and new devices. If there are | |
595 | * inter-device dependencies, it should record sufficient details | |
596 | * so these can be validated. | |
e46273eb | 597 | * Both 'size' and '*freesize' are in sectors. chunk is bytes. |
78e44928 | 598 | */ |
17f25ca6 NB |
599 | int (*validate_geometry)(struct supertype *st, int level, int layout, |
600 | int raiddisks, | |
601 | int chunk, unsigned long long size, | |
2c514b71 NB |
602 | char *subdev, unsigned long long *freesize, |
603 | int verbose); | |
598f0d58 NB |
604 | |
605 | struct mdinfo *(*container_content)(struct supertype *st); | |
a18a888e DW |
606 | /* Allow a metadata handler to override mdadm's default layouts */ |
607 | int (*default_layout)(int level); /* optional */ | |
598f0d58 | 608 | |
549e9569 | 609 | /* for mdmon */ |
cba0191b NB |
610 | int (*open_new)(struct supertype *c, struct active_array *a, |
611 | char *inst); | |
ed9d66aa NB |
612 | |
613 | /* Tell the metadata handler the current state of the array. | |
614 | * This covers whether it is known to be consistent (no pending writes) | |
01f157d7 | 615 | * and how far along a resync is known to have progressed |
ed9d66aa NB |
616 | * (in a->resync_start). |
617 | * resync status is really irrelevant if the array is not consistent, | |
618 | * but some metadata (DDF!) have a place to record the distinction. | |
01f157d7 N |
619 | * If 'consistent' is '2', then the array can mark it dirty if a |
620 | * resync/recovery/whatever is required, or leave it clean if not. | |
621 | * Return value is 0 dirty (not consistent) and 1 if clean. | |
622 | * it is only really important if consistent is passed in as '2'. | |
4e5528c6 | 623 | */ |
01f157d7 | 624 | int (*set_array_state)(struct active_array *a, int consistent); |
7a7cc504 NB |
625 | |
626 | /* When the state of a device might have changed, we call set_disk to | |
627 | * tell the metadata what the current state is. | |
628 | * Typically this happens on spare->in_sync and (spare|in_sync)->faulty | |
629 | * transitions. | |
630 | * set_disk might be called when the state of the particular disk has | |
631 | * not in fact changed. | |
632 | */ | |
8d45d196 | 633 | void (*set_disk)(struct active_array *a, int n, int state); |
2e735d19 NB |
634 | void (*sync_metadata)(struct supertype *st); |
635 | void (*process_update)(struct supertype *st, | |
636 | struct metadata_update *update); | |
edd8d13c NB |
637 | void (*prepare_update)(struct supertype *st, |
638 | struct metadata_update *update); | |
549e9569 | 639 | |
6c3fb95c NB |
640 | /* activate_spare will check if the array is degraded and, if it |
641 | * is, try to find some spare space in the container. | |
642 | * On success, it add appropriate updates (For process_update) to | |
643 | * to the 'updates' list and returns a list of 'mdinfo' identifying | |
644 | * the device, or devices as there might be multiple missing | |
645 | * devices and multiple spares available. | |
646 | */ | |
647 | struct mdinfo *(*activate_spare)(struct active_array *a, | |
648 | struct metadata_update **updates); | |
549e9569 | 649 | |
f277ce36 | 650 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
d03373f1 | 651 | int external; |
4cce4069 | 652 | const char *name; /* canonical metadata name */ |
0063ecba | 653 | } super0, super1, super_ddf, *superlist[]; |
82d9eba6 | 654 | |
0063ecba | 655 | extern struct superswitch super_imsm; |
cdddbdbc | 656 | |
edd8d13c NB |
657 | struct metadata_update { |
658 | int len; | |
659 | char *buf; | |
660 | void *space; /* allocated space that monitor will use */ | |
661 | struct metadata_update *next; | |
662 | }; | |
663 | ||
6adfd3af NB |
664 | /* A supertype holds a particular collection of metadata. |
665 | * It identifies the metadata type by the superswitch, and the particular | |
666 | * sub-version of that metadata type. | |
667 | * metadata read in or created is stored in 'sb' and 'info'. | |
668 | * There are also fields used by mdmon to track containers. | |
669 | * | |
352452c3 N |
670 | * A supertype may refer to: |
671 | * Just an array, possibly in a container | |
672 | * A container, not identifying any particular array | |
673 | * Info read from just one device, not yet fully describing the array/container. | |
674 | * | |
675 | * | |
6adfd3af NB |
676 | * A supertype is created by: |
677 | * super_by_fd | |
678 | * guess_super | |
679 | * dup_super | |
680 | */ | |
82d9eba6 NB |
681 | struct supertype { |
682 | struct superswitch *ss; | |
683 | int minor_version; | |
ea329559 | 684 | int max_devs; |
2f6079dc | 685 | int container_dev; /* devnum of container */ |
f7e7067b | 686 | char subarray[32]; /* name of array inside container */ |
64557c33 | 687 | void *sb; |
111d01fc | 688 | void *info; |
352452c3 N |
689 | int loaded_container; /* Set if load_super found a container, |
690 | * not just one device */ | |
549e9569 | 691 | |
edd8d13c NB |
692 | struct metadata_update *updates; |
693 | struct metadata_update **update_tail; | |
694 | ||
549e9569 NB |
695 | /* extra stuff used by mdmon */ |
696 | struct active_array *arrays; | |
549e9569 | 697 | int sock; /* listen to external programs */ |
549e9569 NB |
698 | int devnum; |
699 | char *devname; /* e.g. md0. This appears in metadata_verison: | |
700 | * external:/md0/12 | |
701 | */ | |
702 | int devcnt; | |
703 | ||
704 | struct mdinfo *devs; | |
705 | ||
82d9eba6 | 706 | }; |
f9ce90ba | 707 | |
1686dc25 | 708 | extern struct supertype *super_by_fd(int fd); |
82d9eba6 | 709 | extern struct supertype *guess_super(int fd); |
3da92f27 | 710 | extern struct supertype *dup_super(struct supertype *st); |
beae1dfe | 711 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
8382f19b NB |
712 | extern void get_one_disk(int mdfd, mdu_array_info_t *ainf, |
713 | mdu_disk_info_t *disk); | |
a7c6e3fb | 714 | void wait_for(char *dev, int fd); |
f9ce90ba | 715 | |
838acbc2 NB |
716 | #if __GNUC__ < 3 |
717 | struct stat64; | |
718 | #endif | |
719 | ||
45e878bb NB |
720 | #define HAVE_NFTW we assume |
721 | #define HAVE_FTW | |
722 | ||
2df1f269 | 723 | #ifdef __UCLIBC__ |
45e878bb | 724 | # include <features.h> |
2df1f269 BRF |
725 | # ifndef __UCLIBC_HAS_LFS__ |
726 | # define lseek64 lseek | |
727 | # endif | |
45e878bb NB |
728 | # ifndef __UCLIBC_HAS_FTW__ |
729 | # undef HAVE_FTW | |
730 | # undef HAVE_NFTW | |
731 | # endif | |
732 | #endif | |
733 | ||
734 | #ifdef __dietlibc__ | |
735 | # undef HAVE_NFTW | |
736 | #endif | |
737 | ||
e39b673e | 738 | #if defined(__KLIBC__) |
739 | # undef HAVE_NFTW | |
740 | # undef HAVE_FTW | |
741 | #endif | |
742 | ||
45e878bb | 743 | #ifndef HAVE_NFTW |
173fc515 | 744 | # define FTW_PHYS 1 |
45e878bb NB |
745 | # ifndef HAVE_FTW |
746 | struct FTW {}; | |
173fc515 NB |
747 | # endif |
748 | #endif | |
749 | ||
45e878bb NB |
750 | #ifdef HAVE_FTW |
751 | # include <ftw.h> | |
752 | #endif | |
753 | ||
173fc515 NB |
754 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); |
755 | ||
f9ce90ba | 756 | |
64c4757e | 757 | extern int Manage_ro(char *devname, int fd, int readonly); |
91f068bf | 758 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); |
dd0781e5 | 759 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); |
64c4757e | 760 | extern int Manage_subdevs(char *devname, int fd, |
dab6685f | 761 | mddev_dev_t devlist, int verbose); |
1f48664b | 762 | extern int autodetect(void); |
e5329c37 | 763 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
8fac0577 | 764 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force); |
06b0d786 | 765 | extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file, |
e86c9dd6 | 766 | long long size, |
19678e53 | 767 | int level, char *layout_str, int chunksize, int raid_disks); |
06b0d786 | 768 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
ea0ebe96 | 769 | int *fdlist, int cnt, char *backup_file, int verbose); |
e9e43ec3 N |
770 | extern int Grow_continue(int mdfd, struct supertype *st, |
771 | struct mdinfo *info, char *backup_file); | |
64c4757e | 772 | |
7f91af49 | 773 | extern int Assemble(struct supertype *st, char *mddev, |
52826846 | 774 | mddev_ident_t ident, |
06b0d786 | 775 | mddev_dev_t devlist, char *backup_file, |
64c4757e | 776 | int readonly, int runstop, |
0ac91628 | 777 | char *update, char *homehost, int require_homehost, |
64c4757e NB |
778 | int verbose, int force); |
779 | ||
7f91af49 N |
780 | extern int Build(char *mddev, int chunk, int level, int layout, |
781 | int raiddisks, mddev_dev_t devlist, int assume_clean, | |
782 | char *bitmap_file, int bitmap_chunk, int write_behind, | |
83208785 | 783 | int delay, int verbose, int autof, unsigned long long size); |
64c4757e NB |
784 | |
785 | ||
7f91af49 | 786 | extern int Create(struct supertype *st, char *mddev, |
5dd497ee | 787 | int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, |
3d3dd91e | 788 | char *name, char *homehost, int *uuid, |
cd29a5c8 | 789 | int subdevs, mddev_dev_t devlist, |
47d79ef8 | 790 | int runstop, int verbose, int force, int assume_clean, |
7f91af49 | 791 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int autof); |
64c4757e | 792 | |
54bad364 | 793 | extern int Detail(char *dev, int brief, int export, int test, char *homehost); |
4cce4069 | 794 | extern int Detail_Platform(struct superswitch *ss, int scan, int verbose); |
e0d19036 | 795 | extern int Query(char *dev); |
0d726f17 KS |
796 | extern int Examine(mddev_dev_t devlist, int brief, int export, int scan, |
797 | int SparcAdjust, struct supertype *forcest, char *homehost); | |
cd29a5c8 | 798 | extern int Monitor(mddev_dev_t devlist, |
e0d19036 | 799 | char *mailaddr, char *alert_cmd, |
aa88f531 | 800 | int period, int daemonise, int scan, int oneshot, |
9a36a9b7 | 801 | int dosyslog, int test, char *pidfile, int increments); |
64c4757e | 802 | |
9277cc77 | 803 | extern int Kill(char *dev, struct supertype *st, int force, int quiet, int noexcl); |
b90c0e9a | 804 | extern int Wait(char *dev); |
9f1da824 | 805 | extern int WaitClean(char *dev, int sock, int verbose); |
9a9dab36 | 806 | |
8382f19b | 807 | extern int Incremental(char *devname, int verbose, int runstop, |
0ac91628 N |
808 | struct supertype *st, char *homehost, int require_homehost, |
809 | int autof); | |
598f0d58 | 810 | extern int Incremental_container(struct supertype *st, char *devname, |
215bb3f7 N |
811 | int verbose, int runstop, int autof, |
812 | int trustworthy); | |
8382f19b NB |
813 | extern void RebuildMap(void); |
814 | extern int IncrementalScan(int verbose); | |
815 | ||
c82f047c NB |
816 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
817 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 818 | unsigned long write_behind, |
dcec9ee5 NB |
819 | unsigned long long array_size, |
820 | int major); | |
55935d51 | 821 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
bf4fb153 | 822 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
2a528478 | 823 | extern unsigned long bitmap_sectors(struct bitmap_super_s *bsb); |
c82f047c | 824 | |
64c4757e | 825 | extern int md_get_version(int fd); |
e0d19036 | 826 | extern int get_linux_version(void); |
84e11361 | 827 | extern long long parse_size(char *size); |
64c4757e | 828 | extern int parse_uuid(char *str, int uuid[4]); |
4a06e2c2 N |
829 | extern int parse_layout_10(char *layout); |
830 | extern int parse_layout_faulty(char *layout); | |
682c7051 NB |
831 | extern int check_ext2(int fd, char *name); |
832 | extern int check_reiser(int fd, char *name); | |
833 | extern int check_raid(int fd, char *name); | |
034b203a | 834 | extern int check_partitions(int fd, char *dname, unsigned long long freesize); |
64c4757e | 835 | |
dd0781e5 | 836 | extern int get_mdp_major(void); |
8b0dabea | 837 | extern int dev_open(char *dev, int flags); |
e8a70c89 | 838 | extern int open_dev(int devnum); |
a931db9e | 839 | extern int open_dev_excl(int devnum); |
8d80900b | 840 | extern int is_standard(char *dev, int *nump); |
9008ed1c | 841 | extern int same_dev(char *one, char *two); |
dd0781e5 | 842 | |
f1ae21c4 | 843 | extern int parse_auto(char *str, char *msg, int config); |
8aec876d NB |
844 | extern mddev_ident_t conf_get_ident(char *dev); |
845 | extern mddev_dev_t conf_get_devs(void); | |
8382f19b | 846 | extern int conf_test_dev(char *devname); |
31015d57 | 847 | extern int conf_test_metadata(const char *version); |
8aec876d NB |
848 | extern struct createinfo *conf_get_create_info(void); |
849 | extern void set_conffile(char *file); | |
850 | extern char *conf_get_mailaddr(void); | |
851 | extern char *conf_get_mailfrom(void); | |
852 | extern char *conf_get_program(void); | |
0ac91628 | 853 | extern char *conf_get_homehost(int *require_homehostp); |
e0d19036 | 854 | extern char *conf_line(FILE *file); |
98c6faba | 855 | extern char *conf_word(FILE *file, int allow_key); |
0ac91628 N |
856 | extern int conf_name_is_free(char *name); |
857 | extern int devname_matches(char *name, char *match); | |
360b4636 | 858 | extern struct mddev_ident_s *conf_match(struct mdinfo *info, struct supertype *st); |
0ac91628 | 859 | |
e0d19036 NB |
860 | extern void free_line(char *line); |
861 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 862 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
36ba7d48 | 863 | extern const int uuid_match_any[4]; |
f277ce36 | 864 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
350f29f9 | 865 | extern void copy_uuid(void *a, int b[4], int swapuuid); |
aae5a112 | 866 | extern char *__fname_from_uuid(int id[4], int swap, char *buf, char sep); |
d7288ddc | 867 | extern char *fname_from_uuid(struct supertype *st, |
ff54de6e | 868 | struct mdinfo *info, char *buf, char sep); |
4b1ac34b | 869 | extern unsigned long calc_csum(void *super, int bytes); |
583315d9 | 870 | extern int enough(int level, int raid_disks, int layout, int clean, |
265e0f17 | 871 | char *avail, int avail_disks); |
e0d19036 | 872 | extern int ask(char *mesg); |
8fac0577 | 873 | extern unsigned long long get_component_size(int fd); |
0430ed48 | 874 | extern void remove_partitions(int fd); |
5f8097be NB |
875 | extern unsigned long long calc_array_size(int level, int raid_disks, int layout, |
876 | int chunksize, unsigned long long devsize); | |
edd8d13c NB |
877 | extern int flush_metadata_updates(struct supertype *st); |
878 | extern void append_metadata_update(struct supertype *st, void *buf, int len); | |
6234c63c DW |
879 | extern int assemble_container_content(struct supertype *st, int mdfd, |
880 | struct mdinfo *content, int runstop, | |
881 | char *chosen_name, int verbose); | |
e0d19036 | 882 | |
7801ac20 N |
883 | extern int add_disk(int mdfd, struct supertype *st, |
884 | struct mdinfo *sra, struct mdinfo *info); | |
f35f2525 | 885 | extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info); |
1e5c6983 | 886 | unsigned long long min_recovery_start(struct mdinfo *array); |
cd29a5c8 | 887 | |
56eb10c0 | 888 | extern char *human_size(long long bytes); |
e4965ef8 N |
889 | extern char *human_size_brief(long long bytes); |
890 | extern void print_r10_layout(int layout); | |
e0d19036 | 891 | |
63152c1b NB |
892 | #define NoMdDev (1<<23) |
893 | extern int find_free_devnum(int use_partitions); | |
894 | ||
e0d19036 NB |
895 | extern void put_md_name(char *name); |
896 | extern char *get_md_name(int dev); | |
897 | ||
c913b90e | 898 | extern char DefaultConfFile[]; |
b5e64645 | 899 | |
69207ff6 N |
900 | extern int create_mddev(char *dev, char *name, int autof, int trustworthy, |
901 | char *chosen); | |
902 | /* values for 'trustworthy' */ | |
903 | #define LOCAL 1 | |
904 | #define FOREIGN 2 | |
905 | #define METADATA 3 | |
6be1d39d | 906 | extern int open_mddev(char *dev, int report_errors); |
a322f70c | 907 | extern int open_container(int fd); |
b5e64645 | 908 | |
5d4d1b26 | 909 | extern char *pid_dir; |
a931db9e | 910 | extern int mdmon_running(int devnum); |
24f6f99b | 911 | extern int mdmon_pid(int devnum); |
40ebbb9c | 912 | extern int check_env(char *name); |
148acb7b | 913 | extern __u32 random32(void); |
8850ee3e | 914 | extern int start_mdmon(int devnum); |
a931db9e | 915 | |
2f6079dc | 916 | extern char *devnum2devname(int num); |
77472ff8 | 917 | extern int devname2devnum(char *name); |
c94709e8 | 918 | extern int stat2devnum(struct stat *st); |
2f6079dc | 919 | extern int fd2devnum(int fd); |
b5e64645 | 920 | |
a931db9e NB |
921 | static inline int dev2major(int d) |
922 | { | |
923 | if (d >= 0) | |
924 | return MD_MAJOR; | |
925 | else | |
926 | return get_mdp_major(); | |
927 | } | |
928 | ||
929 | static inline int dev2minor(int d) | |
930 | { | |
931 | if (d >= 0) | |
932 | return d; | |
933 | return (-1-d) << MdpMinorShift; | |
934 | } | |
935 | ||
6416d527 NB |
936 | static inline int ROUND_UP(int a, int base) |
937 | { | |
938 | return ((a+base-1)/base)*base; | |
939 | } | |
940 | ||
3c558363 N |
941 | static inline int is_subarray(char *vers) |
942 | { | |
e9dd1598 N |
943 | /* The version string for a 'subarray' (an array in a container) |
944 | * is | |
945 | * /containername/componentname for normal read-write arrays | |
946 | * -containername/componentname for read-only arrays. | |
947 | * containername is e.g. md0, md_d1 | |
948 | * componentname is dependant on the metadata. e.g. '1' 'S1' ... | |
949 | */ | |
950 | return (*vers == '/' || *vers == '-'); | |
3c558363 N |
951 | } |
952 | ||
2a24d7b6 DW |
953 | #ifdef DEBUG |
954 | #define dprintf(fmt, arg...) \ | |
955 | fprintf(stderr, fmt, ##arg) | |
956 | #else | |
957 | #define dprintf(fmt, arg...) \ | |
958 | ({ if (0) fprintf(stderr, fmt, ##arg); 0; }) | |
959 | #endif | |
1a0ee0ba DK |
960 | #include <assert.h> |
961 | #include <stdarg.h> | |
962 | static inline int xasprintf(char **strp, const char *fmt, ...) { | |
963 | va_list ap; | |
964 | int ret; | |
965 | va_start(ap, fmt); | |
089485cb | 966 | ret = vasprintf(strp, fmt, ap); |
1a0ee0ba DK |
967 | va_end(ap); |
968 | assert(ret >= 0); | |
969 | return ret; | |
970 | } | |
2a24d7b6 | 971 | |
b5e64645 NB |
972 | #define LEVEL_MULTIPATH (-4) |
973 | #define LEVEL_LINEAR (-1) | |
974 | #define LEVEL_FAULTY (-5) | |
975 | ||
17f25ca6 NB |
976 | /* kernel module doesn't know about these */ |
977 | #define LEVEL_CONTAINER (-100) | |
a322f70c | 978 | #define LEVEL_UNSUPPORTED (-200) |
17f25ca6 | 979 | |
b5e64645 NB |
980 | |
981 | /* faulty stuff */ | |
982 | ||
983 | #define WriteTransient 0 | |
984 | #define ReadTransient 1 | |
985 | #define WritePersistent 2 | |
986 | #define ReadPersistent 3 | |
987 | #define WriteAll 4 /* doesn't go to device */ | |
988 | #define ReadFixable 5 | |
989 | #define Modes 6 | |
990 | ||
991 | #define ClearErrors 31 | |
992 | #define ClearFaults 30 | |
993 | ||
994 | #define AllPersist 100 /* internal use only */ | |
995 | #define NoPersist 101 | |
996 | ||
997 | #define ModeMask 0x1f | |
998 | #define ModeShift 5 | |
fe6729fa NB |
999 | |
1000 | ||
1001 | #ifdef __TINYC__ | |
1002 | #undef minor | |
1003 | #undef major | |
1004 | #undef makedev | |
1005 | #define minor(x) ((x)&0xff) | |
1006 | #define major(x) (((x)>>8)&0xff) | |
1007 | #define makedev(M,m) (((M)<<8) | (m)) | |
1008 | #endif | |
1009 | ||
b640a252 | 1010 | /* for raid4/5/6 */ |
e86c9dd6 NB |
1011 | #define ALGORITHM_LEFT_ASYMMETRIC 0 |
1012 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
1013 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
1014 | #define ALGORITHM_RIGHT_SYMMETRIC 3 | |
b640a252 N |
1015 | |
1016 | /* Define non-rotating (raid4) algorithms. These allow | |
1017 | * conversion of raid4 to raid5. | |
1018 | */ | |
1019 | #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */ | |
1020 | #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */ | |
1021 | ||
1022 | /* DDF RAID6 layouts differ from md/raid6 layouts in two ways. | |
1023 | * Firstly, the exact positioning of the parity block is slightly | |
1024 | * different between the 'LEFT_*' modes of md and the "_N_*" modes | |
1025 | * of DDF. | |
1026 | * Secondly, or order of datablocks over which the Q syndrome is computed | |
1027 | * is different. | |
1028 | * Consequently we have different layouts for DDF/raid6 than md/raid6. | |
1029 | * These layouts are from the DDFv1.2 spec. | |
1030 | * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but | |
1031 | * leaves RLQ=3 as 'Vendor Specific' | |
1032 | */ | |
1033 | ||
1034 | #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */ | |
1035 | #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */ | |
1036 | #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */ | |
1037 | ||
1038 | ||
1039 | /* For every RAID5 algorithm we define a RAID6 algorithm | |
1040 | * with exactly the same layout for data and parity, and | |
1041 | * with the Q block always on the last device (N-1). | |
1042 | * This allows trivial conversion from RAID5 to RAID6 | |
1043 | */ | |
1044 | #define ALGORITHM_LEFT_ASYMMETRIC_6 16 | |
1045 | #define ALGORITHM_RIGHT_ASYMMETRIC_6 17 | |
1046 | #define ALGORITHM_LEFT_SYMMETRIC_6 18 | |
1047 | #define ALGORITHM_RIGHT_SYMMETRIC_6 19 | |
1048 | #define ALGORITHM_PARITY_0_6 20 | |
1049 | #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N | |
1050 | ||
33a6535d AW |
1051 | /* Define PATH_MAX in case we don't use glibc or standard library does |
1052 | * not have PATH_MAX defined. Assume max path length is 4K characters. | |
1053 | */ | |
1054 | #ifndef PATH_MAX | |
1055 | #define PATH_MAX 4096 | |
1056 | #endif | |
1057 |