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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 | |
c21e737b | 67 | #define DEFAULT_CHUNK 512 |
c82f047c NB |
68 | #define DEFAULT_BITMAP_CHUNK 4096 |
69 | #define DEFAULT_BITMAP_DELAY 5 | |
dfd4d8ee | 70 | #define DEFAULT_MAX_WRITE_BEHIND 256 |
64c4757e | 71 | |
753cf905 | 72 | /* MAP_DIR should be somewhere that persists across the pivotroot |
5d4d1b26 | 73 | * from early boot to late boot. |
7f5de63d | 74 | * Currently /dev seems to be the only option on most distros. |
5d4d1b26 | 75 | */ |
753cf905 | 76 | #ifndef MAP_DIR |
7f5de63d | 77 | #define MAP_DIR "/dev/.mdadm" |
753cf905 DL |
78 | #endif /* MAP_DIR */ |
79 | /* MAP_FILE is what we name the map file we put in MAP_DIR, in case you | |
80 | * want something other than the default of "map" | |
81 | */ | |
82 | #ifndef MAP_FILE | |
83 | #define MAP_FILE "map" | |
84 | #endif /* MAP_FILE */ | |
85 | /* MDMON_DIR is where pid and socket files used for communicating | |
86 | * with mdmon normally live. It *should* be /var/run, but when | |
87 | * mdmon is needed at early boot then it needs to write there prior | |
88 | * to /var/run being mounted read/write, and it also then needs to | |
89 | * persist beyond when /var/run is mounter read-only. So, to be | |
90 | * safe, the default is somewhere that is read/write early in the | |
91 | * boot process and stays up as long as possible during shutdown. | |
92 | */ | |
93 | #ifndef MDMON_DIR | |
7f5de63d | 94 | #define MDMON_DIR "/dev/.mdadm/" |
753cf905 | 95 | #endif /* MDMON_DIR */ |
5d4d1b26 | 96 | |
403410eb PC |
97 | /* FAILED_SLOTS is where to save files storing recent removal of array |
98 | * member in order to allow future reuse of disk inserted in the same | |
99 | * slot for array recovery | |
100 | */ | |
101 | #ifndef FAILED_SLOTS_DIR | |
102 | #define FAILED_SLOTS_DIR "/dev/.mdadm/failed-slots" | |
103 | #endif /* FAILED_SLOTS */ | |
104 | ||
64c4757e | 105 | #include "md_u.h" |
e0d19036 | 106 | #include "md_p.h" |
c82f047c | 107 | #include "bitmap.h" |
f7dd881f | 108 | #include "msg.h" |
64c4757e | 109 | |
1e0d770c | 110 | #include <endian.h> |
efd441d1 NB |
111 | /* Redhat don't like to #include <asm/byteorder.h>, and |
112 | * some time include <linux/byteorder/xxx_endian.h> isn't enough, | |
113 | * and there is no standard conversion function so... */ | |
0ae03b8a NB |
114 | /* And dietlibc doesn't think byteswap is ok, so.. */ |
115 | /* #include <byteswap.h> */ | |
116 | #define bswap_16(x) (((x) & 0x00ffU) << 8 | \ | |
117 | ((x) & 0xff00U) >> 8) | |
118 | #define bswap_32(x) (((x) & 0x000000ffU) << 24 | \ | |
119 | ((x) & 0xff000000U) >> 24 | \ | |
120 | ((x) & 0x0000ff00U) << 8 | \ | |
121 | ((x) & 0x00ff0000U) >> 8) | |
122 | #define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \ | |
123 | ((x) & 0xff00000000000000ULL) >> 56 | \ | |
124 | ((x) & 0x000000000000ff00ULL) << 40 | \ | |
125 | ((x) & 0x00ff000000000000ULL) >> 40 | \ | |
126 | ((x) & 0x0000000000ff0000ULL) << 24 | \ | |
127 | ((x) & 0x0000ff0000000000ULL) >> 24 | \ | |
128 | ((x) & 0x00000000ff000000ULL) << 8 | \ | |
129 | ((x) & 0x000000ff00000000ULL) >> 8) | |
130 | ||
e39b673e | 131 | #if !defined(__KLIBC__) |
efd441d1 NB |
132 | #if BYTE_ORDER == LITTLE_ENDIAN |
133 | #define __cpu_to_le16(_x) (_x) | |
134 | #define __cpu_to_le32(_x) (_x) | |
135 | #define __cpu_to_le64(_x) (_x) | |
136 | #define __le16_to_cpu(_x) (_x) | |
137 | #define __le32_to_cpu(_x) (_x) | |
138 | #define __le64_to_cpu(_x) (_x) | |
974e620d NB |
139 | |
140 | #define __cpu_to_be16(_x) bswap_16(_x) | |
141 | #define __cpu_to_be32(_x) bswap_32(_x) | |
142 | #define __cpu_to_be64(_x) bswap_64(_x) | |
143 | #define __be16_to_cpu(_x) bswap_16(_x) | |
144 | #define __be32_to_cpu(_x) bswap_32(_x) | |
145 | #define __be64_to_cpu(_x) bswap_64(_x) | |
efd441d1 NB |
146 | #elif BYTE_ORDER == BIG_ENDIAN |
147 | #define __cpu_to_le16(_x) bswap_16(_x) | |
148 | #define __cpu_to_le32(_x) bswap_32(_x) | |
149 | #define __cpu_to_le64(_x) bswap_64(_x) | |
150 | #define __le16_to_cpu(_x) bswap_16(_x) | |
151 | #define __le32_to_cpu(_x) bswap_32(_x) | |
152 | #define __le64_to_cpu(_x) bswap_64(_x) | |
974e620d NB |
153 | |
154 | #define __cpu_to_be16(_x) (_x) | |
155 | #define __cpu_to_be32(_x) (_x) | |
156 | #define __cpu_to_be64(_x) (_x) | |
157 | #define __be16_to_cpu(_x) (_x) | |
158 | #define __be32_to_cpu(_x) (_x) | |
159 | #define __be64_to_cpu(_x) (_x) | |
1e0d770c NB |
160 | #else |
161 | # error "unknown endianness." | |
162 | #endif | |
e39b673e | 163 | #endif /* __KLIBC__ */ |
1e0d770c NB |
164 | |
165 | ||
1e5c6983 DW |
166 | /* |
167 | * min()/max()/clamp() macros that also do | |
168 | * strict type-checking.. See the | |
169 | * "unnecessary" pointer comparison. | |
170 | */ | |
171 | #define min(x, y) ({ \ | |
172 | typeof(x) _min1 = (x); \ | |
173 | typeof(y) _min2 = (y); \ | |
174 | (void) (&_min1 == &_min2); \ | |
175 | _min1 < _min2 ? _min1 : _min2; }) | |
176 | ||
177 | #define max(x, y) ({ \ | |
178 | typeof(x) _max1 = (x); \ | |
179 | typeof(y) _max2 = (y); \ | |
180 | (void) (&_max1 == &_max2); \ | |
181 | _max1 > _max2 ? _max1 : _max2; }) | |
1e0d770c | 182 | |
4b1ac34b NB |
183 | /* general information that might be extracted from a superblock */ |
184 | struct mdinfo { | |
185 | mdu_array_info_t array; | |
186 | mdu_disk_info_t disk; | |
187 | __u64 events; | |
fbf8a0b7 | 188 | int uuid[4]; |
31317663 | 189 | char name[33]; |
353632d9 | 190 | unsigned long long data_offset; |
598f0d58 NB |
191 | unsigned long long component_size; /* same as array.size, except in |
192 | * sectors and up to 64bits. | |
193 | */ | |
da9b4a62 DW |
194 | unsigned long long custom_array_size; /* size for non-default sized |
195 | * arrays (in sectors) | |
196 | */ | |
353632d9 NB |
197 | int reshape_active; |
198 | unsigned long long reshape_progress; | |
e1516be1 DW |
199 | union { |
200 | unsigned long long resync_start; /* per-array resync position */ | |
201 | unsigned long long recovery_start; /* per-device rebuild position */ | |
b7528a20 | 202 | #define MaxSector (~0ULL) /* resync/recovery complete position */ |
e1516be1 | 203 | }; |
a67dd8cc | 204 | unsigned long safe_mode_delay; /* ms delay to mark clean */ |
353632d9 | 205 | int new_level, delta_disks, new_layout, new_chunk; |
06c7f68e | 206 | int errors; |
f21e18ca | 207 | unsigned long cache_size; /* size of raid456 stripe cache*/ |
7e0f6979 NB |
208 | int mismatch_cnt; |
209 | char text_version[50]; | |
6e46bf34 DW |
210 | void *update_private; /* for passing metadata-format |
211 | * specific update data | |
212 | * between successive calls to | |
213 | * update_super() | |
214 | */ | |
dd15dc4a NB |
215 | |
216 | int container_member; /* for assembling external-metatdata arrays | |
217 | * This is to be used internally by metadata | |
218 | * handler only */ | |
97b4d0e9 DW |
219 | int container_enough; /* flag external handlers can set to |
220 | * indicate that subarrays have not enough (-1), | |
221 | * enough to start (0), or all expected disks (1) */ | |
06c7f68e | 222 | char sys_name[20]; |
7e0f6979 | 223 | struct mdinfo *devs; |
06c7f68e | 224 | struct mdinfo *next; |
549e9569 NB |
225 | |
226 | /* Device info for mdmon: */ | |
e1516be1 | 227 | int recovery_fd; |
549e9569 | 228 | int state_fd; |
8d45d196 DW |
229 | #define DS_FAULTY 1 |
230 | #define DS_INSYNC 2 | |
231 | #define DS_WRITE_MOSTLY 4 | |
232 | #define DS_SPARE 8 | |
233 | #define DS_BLOCKED 16 | |
234 | #define DS_REMOVE 1024 | |
92967543 | 235 | #define DS_UNBLOCK 2048 |
549e9569 NB |
236 | int prev_state, curr_state, next_state; |
237 | ||
4b1ac34b NB |
238 | }; |
239 | ||
5bbb4842 NB |
240 | struct createinfo { |
241 | int uid; | |
242 | int gid; | |
243 | int autof; | |
244 | int mode; | |
38098016 | 245 | int symlinks; |
058574b1 | 246 | struct supertype *supertype; |
5bbb4842 NB |
247 | }; |
248 | ||
9a9dab36 | 249 | #define Name "mdadm" |
682c7051 | 250 | |
e0d19036 NB |
251 | enum mode { |
252 | ASSEMBLE=1, | |
253 | BUILD, | |
254 | CREATE, | |
255 | MANAGE, | |
256 | MISC, | |
257 | MONITOR, | |
dd0781e5 | 258 | GROW, |
8382f19b | 259 | INCREMENTAL, |
1f48664b | 260 | AUTODETECT, |
e0d19036 NB |
261 | }; |
262 | ||
64c4757e | 263 | extern char short_options[]; |
024768c4 | 264 | extern char short_bitmap_options[]; |
c06487ce | 265 | extern char short_bitmap_auto_options[]; |
64c4757e | 266 | extern struct option long_options[]; |
56eedc1a | 267 | extern char Version[], Usage[], Help[], OptionHelp[], |
dd0781e5 | 268 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
8382f19b | 269 | Help_incr[], |
e0d19036 | 270 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 271 | |
997aed5d | 272 | /* for option that don't have short equivilents, we assign arbitrary |
1c7a808c | 273 | * numbers later than any 'short' character option. |
997aed5d NB |
274 | */ |
275 | enum special_options { | |
1c7a808c | 276 | AssumeClean = 300, |
997aed5d NB |
277 | BitmapChunk, |
278 | WriteBehind, | |
279 | ReAdd, | |
280 | NoDegraded, | |
281 | Sparc22, | |
1c7a808c | 282 | BackupFile, |
997aed5d | 283 | HomeHost, |
589395d6 | 284 | AutoHomeHost, |
38098016 | 285 | Symlinks, |
1f48664b | 286 | AutoDetect, |
1770662b | 287 | Waitclean, |
4cce4069 | 288 | DetailPlatform, |
33414a01 | 289 | KillSubarray, |
1c7a808c | 290 | UpdateSubarray, |
edde9560 | 291 | IncrementalPath, |
1c7a808c N |
292 | NoSharing, |
293 | HelpOptions, | |
294 | Brief, | |
295 | ManageOpt, | |
296 | Add, | |
297 | Remove, | |
298 | Fail, | |
299 | MiscOpt, | |
300 | WaitOpt, | |
301 | ConfigFile, | |
302 | ChunkSize, | |
303 | WriteMostly, | |
304 | Layout, | |
305 | Auto, | |
306 | Force, | |
307 | SuperMinor, | |
308 | EMail, | |
309 | ProgramOpt, | |
310 | Increment, | |
311 | Fork, | |
312 | Bitmap, | |
313 | RebuildMapOpt, | |
87f26d14 | 314 | InvalidBackup, |
20b60dcd | 315 | UdevRules, |
997aed5d NB |
316 | }; |
317 | ||
64c4757e | 318 | /* structures read from config file */ |
52826846 NB |
319 | /* List of mddevice names and identifiers |
320 | * Identifiers can be: | |
321 | * uuid=128-hex-uuid | |
322 | * super-minor=decimal-minor-number-from-superblock | |
323 | * devices=comma,separated,list,of,device,names,with,wildcards | |
324 | * | |
325 | * If multiple fields are present, the intersection of all matching | |
326 | * devices is considered | |
327 | */ | |
98c6faba | 328 | #define UnSet (0xfffe) |
fa56eddb | 329 | struct mddev_ident { |
dd0781e5 | 330 | char *devname; |
aba69144 | 331 | |
dd0781e5 | 332 | int uuid_set; |
3fa06e9d | 333 | int uuid[4]; |
947fd4dd | 334 | char name[33]; |
52826846 | 335 | |
f21e18ca | 336 | int super_minor; |
52826846 | 337 | |
dd0781e5 | 338 | char *devices; /* comma separated list of device |
52826846 NB |
339 | * names with wild cards |
340 | */ | |
dd0781e5 | 341 | int level; |
f21e18ca N |
342 | int raid_disks; |
343 | int spare_disks; | |
82d9eba6 | 344 | struct supertype *st; |
dd0781e5 NB |
345 | int autof; /* 1 for normal, 2 for partitioned */ |
346 | char *spare_group; | |
7ef02d01 | 347 | char *bitmap_file; |
c82f047c | 348 | int bitmap_fd; |
dd0781e5 | 349 | |
1771a6e2 N |
350 | char *container; /* /dev/whatever name of container, or |
351 | * uuid of container. You would expect | |
352 | * this to be the 'devname' or UUID | |
dbb44303 N |
353 | * of some other entry. |
354 | */ | |
355 | char *member; /* subarray within a container */ | |
356 | ||
fa56eddb | 357 | struct mddev_ident *next; |
b179246f N |
358 | union { |
359 | /* fields needed by different users of this structure */ | |
360 | int assembled; /* set when assembly succeeds */ | |
361 | }; | |
fa56eddb | 362 | }; |
64c4757e NB |
363 | |
364 | /* List of device names - wildcards expanded */ | |
a655e550 | 365 | struct mddev_dev { |
64c4757e | 366 | char *devname; |
1c7a808c | 367 | int disposition; /* 'a' for add, 'r' for remove, 'f' for fail. |
cd29a5c8 NB |
368 | * Not set for names read from .config |
369 | */ | |
b3d31955 | 370 | char writemostly; /* 1 for 'set writemostly', 2 for 'clear writemostly' */ |
fe80f49b | 371 | char re_add; |
811e6cbe | 372 | char used; /* set when used */ |
a655e550 N |
373 | struct mddev_dev *next; |
374 | }; | |
64c4757e | 375 | |
682c7051 NB |
376 | typedef struct mapping { |
377 | char *name; | |
378 | int num; | |
379 | } mapping_t; | |
380 | ||
e0d19036 NB |
381 | |
382 | struct mdstat_ent { | |
383 | char *dev; | |
384 | int devnum; | |
385 | int active; | |
386 | char *level; | |
387 | char *pattern; /* U or up, _ for down */ | |
388 | int percent; /* -1 if no resync */ | |
f94c116f | 389 | int resync; /* 3 if check, 2 if reshape, 1 if resync, 0 if recovery */ |
549e9569 NB |
390 | int devcnt; |
391 | int raid_disks; | |
549e9569 | 392 | char * metadata_version; |
3b57c466 N |
393 | struct dev_member { |
394 | char *name; | |
395 | struct dev_member *next; | |
396 | } *members; | |
e0d19036 NB |
397 | struct mdstat_ent *next; |
398 | }; | |
399 | ||
22a88995 | 400 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
e0d19036 | 401 | extern void free_mdstat(struct mdstat_ent *ms); |
dd0781e5 | 402 | extern void mdstat_wait(int seconds); |
58a4ba2a | 403 | extern void mdstat_wait_fd(int fd, const sigset_t *sigmask); |
8382f19b | 404 | extern int mddev_busy(int devnum); |
3b57c466 | 405 | extern struct mdstat_ent *mdstat_by_component(char *name); |
78b10e66 | 406 | extern struct mdstat_ent *mdstat_by_subdev(char *subdev, int container); |
8382f19b NB |
407 | |
408 | struct map_ent { | |
409 | struct map_ent *next; | |
410 | int devnum; | |
1522c538 | 411 | char metadata[20]; |
8382f19b | 412 | int uuid[4]; |
195254b8 | 413 | int bad; |
8382f19b NB |
414 | char *path; |
415 | }; | |
1522c538 | 416 | extern int map_update(struct map_ent **mpp, int devnum, char *metadata, |
8382f19b | 417 | int uuid[4], char *path); |
4eb26970 | 418 | extern void map_remove(struct map_ent **map, int devnum); |
8382f19b | 419 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); |
f2e55ecc N |
420 | extern struct map_ent *map_by_devnum(struct map_ent **map, int devnum); |
421 | extern struct map_ent *map_by_name(struct map_ent **map, char *name); | |
8382f19b NB |
422 | extern void map_read(struct map_ent **melp); |
423 | extern int map_write(struct map_ent *mel); | |
424 | extern void map_delete(struct map_ent **mapp, int devnum); | |
425 | extern void map_free(struct map_ent *map); | |
426 | extern void map_add(struct map_ent **melp, | |
1522c538 | 427 | int devnum, char *metadata, int uuid[4], char *path); |
ad5bc697 N |
428 | extern int map_lock(struct map_ent **melp); |
429 | extern void map_unlock(struct map_ent **melp); | |
e0d19036 | 430 | |
e86c9dd6 | 431 | /* various details can be requested */ |
dab4a513 DW |
432 | enum sysfs_read_flags { |
433 | GET_LEVEL = (1 << 0), | |
434 | GET_LAYOUT = (1 << 1), | |
435 | GET_COMPONENT = (1 << 2), | |
436 | GET_CHUNK = (1 << 3), | |
437 | GET_CACHE = (1 << 4), | |
438 | GET_MISMATCH = (1 << 5), | |
439 | GET_VERSION = (1 << 6), | |
440 | GET_DISKS = (1 << 7), | |
441 | GET_DEGRADED = (1 << 8), | |
442 | GET_SAFEMODE = (1 << 9), | |
443 | GET_DEVS = (1 << 10), /* gets role, major, minor */ | |
444 | GET_OFFSET = (1 << 11), | |
445 | GET_SIZE = (1 << 12), | |
446 | GET_STATE = (1 << 13), | |
447 | GET_ERROR = (1 << 14), | |
dab4a513 | 448 | }; |
e86c9dd6 NB |
449 | |
450 | /* If fd >= 0, get the array it is open on, | |
451 | * else use devnum. >=0 -> major9. <0..... | |
452 | */ | |
549e9569 | 453 | extern int sysfs_open(int devnum, char *devname, char *attr); |
f35f2525 | 454 | extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum); |
7e0f6979 NB |
455 | extern void sysfs_free(struct mdinfo *sra); |
456 | extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options); | |
1770662b DW |
457 | extern int sysfs_attr_match(const char *attr, const char *str); |
458 | extern int sysfs_match_word(const char *word, char **list); | |
7e0f6979 | 459 | extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 460 | char *name, char *val); |
7e0f6979 | 461 | extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 462 | char *name, unsigned long long val); |
97590376 | 463 | extern int sysfs_uevent(struct mdinfo *sra, char *event); |
7236ee7a N |
464 | extern int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev, |
465 | char *name); | |
466 | extern int sysfs_fd_get_ll(int fd, unsigned long long *val); | |
7e0f6979 | 467 | extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 468 | char *name, unsigned long long *val); |
7236ee7a | 469 | extern int sysfs_fd_get_str(int fd, char *val, int size); |
bc77ed53 DW |
470 | extern int sysfs_attribute_available(struct mdinfo *sra, struct mdinfo *dev, |
471 | char *name); | |
93ecfa01 N |
472 | extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
473 | char *name, char *val, int size); | |
8ed3e5e1 | 474 | extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms); |
f35f2525 | 475 | extern int sysfs_set_array(struct mdinfo *info, int vers); |
2904b26f | 476 | extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume); |
f1665f72 | 477 | extern int sysfs_disk_to_scsi_id(int fd, __u32 *id); |
f94d52f4 | 478 | extern int sysfs_unique_holder(int devnum, long rdev); |
bc77ed53 | 479 | extern int sysfs_freeze_array(struct mdinfo *sra); |
c69b251b | 480 | extern int load_sys(char *path, char *buf); |
130994cb AK |
481 | extern int reshape_prepare_fdlist(char *devname, |
482 | struct mdinfo *sra, | |
483 | int raid_disks, | |
484 | int nrdisks, | |
485 | unsigned long blocks, | |
486 | char *backup_file, | |
487 | int *fdlist, | |
488 | unsigned long long *offsets); | |
489 | extern void reshape_free_fdlist(int *fdlist, | |
490 | unsigned long long *offsets, | |
491 | int size); | |
e6e9d47b AK |
492 | extern int reshape_open_backup_file(char *backup, |
493 | int fd, | |
494 | char *devname, | |
495 | long blocks, | |
496 | int *fdlist, | |
a93f87ee N |
497 | unsigned long long *offsets, |
498 | int restart); | |
1c009fc2 AK |
499 | extern unsigned long compute_backup_blocks(int nchunk, int ochunk, |
500 | unsigned int ndata, unsigned int odata); | |
e86c9dd6 NB |
501 | |
502 | extern int save_stripes(int *source, unsigned long long *offsets, | |
503 | int raid_disks, int chunk_size, int level, int layout, | |
504 | int nwrites, int *dest, | |
a6288483 N |
505 | unsigned long long start, unsigned long long length, |
506 | char *buf); | |
353632d9 NB |
507 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
508 | int raid_disks, int chunk_size, int level, int layout, | |
509 | int source, unsigned long long read_offset, | |
510 | unsigned long long start, unsigned long long length); | |
e86c9dd6 | 511 | |
52826846 NB |
512 | #ifndef Sendmail |
513 | #define Sendmail "/usr/lib/sendmail -t" | |
514 | #endif | |
515 | ||
773135f5 NB |
516 | #define SYSLOG_FACILITY LOG_DAEMON |
517 | ||
682c7051 NB |
518 | extern char *map_num(mapping_t *map, int num); |
519 | extern int map_name(mapping_t *map, char *name); | |
b640a252 | 520 | extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[]; |
682c7051 | 521 | |
16c6fa80 | 522 | extern char *map_dev(int major, int minor, int create); |
64c4757e | 523 | |
549e9569 | 524 | struct active_array; |
2e735d19 | 525 | struct metadata_update; |
64c4757e | 526 | |
999b4972 N |
527 | |
528 | /* 'struct reshape' records the intermediate states | |
529 | * a general reshape. | |
530 | * The starting geometry is converted to the 'before' geometry | |
531 | * by at most an atomic level change. They could be the same. | |
532 | * Similarly the 'after' geometry is converted to the final | |
533 | * geometry by at most a level change. | |
534 | * Note that 'before' and 'after' must have the same level. | |
535 | * 'blocks' is the minimum number of sectors for a reshape unit. | |
536 | * This will be a multiple of the stripe size in each of the | |
537 | * 'before' and 'after' geometries. | |
538 | * If 'blocks' is 0, no restriping is necessary. | |
539 | */ | |
540 | struct reshape { | |
541 | int level; | |
542 | int parity; /* number of parity blocks/devices */ | |
543 | struct { | |
544 | int layout; | |
545 | int data_disks; | |
546 | } before, after; | |
547 | unsigned long long backup_blocks; | |
548 | unsigned long long stripes; /* number of old stripes that comprise 'blocks'*/ | |
549 | unsigned long long new_size; /* New size of array in sectors */ | |
550 | }; | |
551 | ||
6adfd3af NB |
552 | /* A superswitch provides entry point the a metadata handler. |
553 | * | |
554 | * The super_switch primarily operates on some "metadata" that | |
555 | * is accessed via the 'supertype'. | |
556 | * This metadata has one of three possible sources. | |
557 | * 1/ It is read from a single device. In this case it may not completely | |
558 | * describe the array or arrays as some information might be on other | |
559 | * devices. | |
560 | * 2/ It is read from all devices in a container. In this case all | |
561 | * information is present. | |
562 | * 3/ It is created by ->init_super / ->add_to_super. In this case it will | |
563 | * be complete once enough ->add_to_super calls have completed. | |
564 | * | |
565 | * When creating an array inside a container, the metadata will be | |
566 | * formed by a combination of 2 and 3. The metadata or the array is read, | |
567 | * then new information is added. | |
568 | * | |
569 | * The metadata must sometimes have a concept of a 'current' array | |
570 | * and a 'current' device. | |
571 | * The 'current' array is set by init_super to be the newly created array, | |
572 | * or is set by super_by_fd when it finds it is looking at an array inside | |
573 | * a container. | |
574 | * | |
575 | * The 'current' device is either the device that the metadata was read from | |
576 | * in case 1, or the last device added by add_to_super in case 3. | |
577 | * Case 2 does not identify a 'current' device. | |
578 | */ | |
f9ce90ba | 579 | extern struct superswitch { |
6adfd3af NB |
580 | |
581 | /* Used to report details of metadata read from a component | |
582 | * device. ->load_super has been called. | |
583 | */ | |
3da92f27 | 584 | void (*examine_super)(struct supertype *st, char *homehost); |
061f2c6a | 585 | void (*brief_examine_super)(struct supertype *st, int verbose); |
4737ae25 | 586 | void (*brief_examine_subarrays)(struct supertype *st, int verbose); |
0d726f17 | 587 | void (*export_examine_super)(struct supertype *st); |
6adfd3af NB |
588 | |
589 | /* Used to report details of an active array. | |
590 | * ->load_super was possibly given a 'component' string. | |
591 | */ | |
3da92f27 | 592 | void (*detail_super)(struct supertype *st, char *homehost); |
3da92f27 | 593 | void (*brief_detail_super)(struct supertype *st); |
0d726f17 | 594 | void (*export_detail_super)(struct supertype *st); |
6adfd3af | 595 | |
4cce4069 | 596 | /* Optional: platform hardware / firmware details */ |
5615172f | 597 | int (*detail_platform)(int verbose, int enumerate_only); |
4cce4069 | 598 | |
6adfd3af NB |
599 | /* Used: |
600 | * to get uuid to storing in bitmap metadata | |
601 | * and 'reshape' backup-data metadata | |
602 | * To see if a device is being re-added to an array it was part of. | |
603 | */ | |
3da92f27 | 604 | void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
6adfd3af | 605 | |
8592f29d | 606 | /* Extract generic details from metadata. This could be details about |
6adfd3af NB |
607 | * the container, or about an individual array within the container. |
608 | * The determination is made either by: | |
609 | * load_super being given a 'component' string. | |
610 | * validate_geometry determining what to create. | |
d2ca6449 NB |
611 | * The info includes both array information and device information. |
612 | * The particular device should be: | |
613 | * The last device added by add_to_super | |
614 | * The device the metadata was loaded from by load_super | |
a5d85af7 N |
615 | * If 'map' is present, then it is an array raid_disks long |
616 | * (raid_disk must already be set and correct) and it is filled | |
617 | * with 1 for slots that are thought to be active and 0 for slots which | |
618 | * appear to be failed/missing. | |
6adfd3af | 619 | */ |
a5d85af7 | 620 | void (*getinfo_super)(struct supertype *st, struct mdinfo *info, char *map); |
5c4cd5da | 621 | struct mdinfo *(*getinfo_super_disks)(struct supertype *st); |
6adfd3af | 622 | /* Check if the given metadata is flagged as belonging to "this" |
9362c1c8 | 623 | * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost" |
6adfd3af | 624 | */ |
3da92f27 | 625 | int (*match_home)(struct supertype *st, char *homehost); |
6adfd3af NB |
626 | |
627 | /* Make one of several generic modifications to metadata | |
628 | * prior to assembly (or other times). | |
629 | * sparc2.2 - first bug in early 0.90 metadata | |
630 | * super-minor - change name of 0.90 metadata | |
631 | * summaries - 'correct' any redundant data | |
632 | * resync - mark array as dirty to trigger a resync. | |
633 | * uuid - set new uuid - only 0.90 or 1.x | |
634 | * name - change the name of the array (where supported) | |
635 | * homehost - change which host this array is tied to. | |
636 | * devicesize - If metadata is at start of device, change recorded | |
637 | * device size to match actual device size | |
638 | * byteorder - swap bytes for 0.90 metadata | |
639 | * | |
640 | * force-one - mark that device as uptodate, not old or failed. | |
641 | * force-array - mark array as clean if it would not otherwise | |
642 | * assemble | |
643 | * assemble - not sure how this is different from force-one... | |
644 | * linear-grow-new - add a new device to a linear array, but don't | |
645 | * change the size: so superblock still matches | |
646 | * linear-grow-update - now change the size of the array. | |
647 | */ | |
68c7d6d7 | 648 | int (*update_super)(struct supertype *st, struct mdinfo *info, |
3da92f27 | 649 | char *update, |
e5eac01f NB |
650 | char *devname, int verbose, |
651 | int uuid_set, char *homehost); | |
6adfd3af NB |
652 | |
653 | /* Create new metadata for new array as described. This could | |
654 | * be a new container, or an array in a pre-existing container. | |
655 | * Also used to zero metadata prior to writing it to invalidate old | |
656 | * metadata. | |
657 | */ | |
3da92f27 NB |
658 | int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
659 | unsigned long long size, char *name, | |
660 | char *homehost, int *uuid); | |
6adfd3af NB |
661 | |
662 | /* update the metadata to include new device, either at create or | |
663 | * when hot-adding a spare. | |
664 | */ | |
f20c3968 | 665 | int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
1a64be56 LM |
666 | int fd, char *devname); |
667 | /* update the metadata to delete a device, | |
668 | * when hot-removing. | |
669 | */ | |
670 | int (*remove_from_super)(struct supertype *st, mdu_disk_info_t *dinfo); | |
6adfd3af NB |
671 | |
672 | /* Write metadata to one device when fixing problems or adding | |
673 | * a new device. | |
674 | */ | |
3da92f27 | 675 | int (*store_super)(struct supertype *st, int fd); |
6adfd3af NB |
676 | |
677 | /* Write all metadata for this array. | |
678 | */ | |
111d01fc | 679 | int (*write_init_super)(struct supertype *st); |
64557c33 | 680 | int (*compare_super)(struct supertype *st, struct supertype *tst); |
3da92f27 | 681 | int (*load_super)(struct supertype *st, int fd, char *devname); |
2b959fbf | 682 | int (*load_container)(struct supertype *st, int fd, char *devname); |
82d9eba6 | 683 | struct supertype * (*match_metadata_desc)(char *arg); |
1bf4e2d9 | 684 | __u64 (*avail_size)(struct supertype *st, __u64 size); |
80e7f8c3 | 685 | unsigned long long (*min_acceptable_spare_size)(struct supertype *st); |
3da92f27 | 686 | int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
199171a2 | 687 | int delay, int write_behind, |
f9c25f1d | 688 | unsigned long long size, int may_change, int major); |
3da92f27 NB |
689 | void (*locate_bitmap)(struct supertype *st, int fd); |
690 | int (*write_bitmap)(struct supertype *st, int fd); | |
691 | void (*free_super)(struct supertype *st); | |
78e44928 NB |
692 | |
693 | /* validate_geometry is called with an st returned by | |
694 | * match_metadata_desc. | |
695 | * It should check that the geometry described in compatible with | |
696 | * the metadata type. It will be called repeatedly as devices | |
697 | * added to validate changing size and new devices. If there are | |
698 | * inter-device dependencies, it should record sufficient details | |
699 | * so these can be validated. | |
30f58b22 | 700 | * Both 'size' and '*freesize' are in sectors. chunk is KiB. |
78e44928 | 701 | */ |
17f25ca6 NB |
702 | int (*validate_geometry)(struct supertype *st, int level, int layout, |
703 | int raiddisks, | |
c21e737b | 704 | int *chunk, unsigned long long size, |
2c514b71 NB |
705 | char *subdev, unsigned long long *freesize, |
706 | int verbose); | |
598f0d58 | 707 | |
00bbdbda | 708 | struct mdinfo *(*container_content)(struct supertype *st, char *subarray); |
30f58b22 DW |
709 | /* query the supertype for default geometry */ |
710 | void (*default_geometry)(struct supertype *st, int *level, int *layout, int *chunk); /* optional */ | |
33414a01 DW |
711 | /* Permit subarray's to be deleted from inactive containers */ |
712 | int (*kill_subarray)(struct supertype *st); /* optional */ | |
aa534678 | 713 | /* Permit subarray's to be modified */ |
a951a4f7 | 714 | int (*update_subarray)(struct supertype *st, char *subarray, |
fa56eddb | 715 | char *update, struct mddev_ident *ident); /* optional */ |
7bc71196 DW |
716 | /* Check if reshape is supported for this external format. |
717 | * st is obtained from super_by_fd() where st->subarray[0] is | |
718 | * initialized to indicate if reshape is being performed at the | |
719 | * container or subarray level | |
720 | */ | |
721 | int (*reshape_super)(struct supertype *st, long long size, int level, | |
722 | int layout, int chunksize, int raid_disks, | |
41784c88 AK |
723 | int delta_disks, char *backup, char *dev, |
724 | int verbose); /* optional */ | |
999b4972 N |
725 | int (*manage_reshape)( /* optional */ |
726 | int afd, struct mdinfo *sra, struct reshape *reshape, | |
727 | struct supertype *st, unsigned long blocks, | |
728 | int *fds, unsigned long long *offsets, | |
729 | int dests, int *destfd, unsigned long long *destoffsets); | |
598f0d58 | 730 | |
549e9569 | 731 | /* for mdmon */ |
cba0191b NB |
732 | int (*open_new)(struct supertype *c, struct active_array *a, |
733 | char *inst); | |
ed9d66aa NB |
734 | |
735 | /* Tell the metadata handler the current state of the array. | |
736 | * This covers whether it is known to be consistent (no pending writes) | |
01f157d7 | 737 | * and how far along a resync is known to have progressed |
ed9d66aa NB |
738 | * (in a->resync_start). |
739 | * resync status is really irrelevant if the array is not consistent, | |
740 | * but some metadata (DDF!) have a place to record the distinction. | |
01f157d7 N |
741 | * If 'consistent' is '2', then the array can mark it dirty if a |
742 | * resync/recovery/whatever is required, or leave it clean if not. | |
743 | * Return value is 0 dirty (not consistent) and 1 if clean. | |
744 | * it is only really important if consistent is passed in as '2'. | |
4e5528c6 | 745 | */ |
01f157d7 | 746 | int (*set_array_state)(struct active_array *a, int consistent); |
7a7cc504 NB |
747 | |
748 | /* When the state of a device might have changed, we call set_disk to | |
749 | * tell the metadata what the current state is. | |
750 | * Typically this happens on spare->in_sync and (spare|in_sync)->faulty | |
751 | * transitions. | |
752 | * set_disk might be called when the state of the particular disk has | |
753 | * not in fact changed. | |
754 | */ | |
8d45d196 | 755 | void (*set_disk)(struct active_array *a, int n, int state); |
2e735d19 NB |
756 | void (*sync_metadata)(struct supertype *st); |
757 | void (*process_update)(struct supertype *st, | |
758 | struct metadata_update *update); | |
edd8d13c NB |
759 | void (*prepare_update)(struct supertype *st, |
760 | struct metadata_update *update); | |
549e9569 | 761 | |
6c3fb95c NB |
762 | /* activate_spare will check if the array is degraded and, if it |
763 | * is, try to find some spare space in the container. | |
764 | * On success, it add appropriate updates (For process_update) to | |
765 | * to the 'updates' list and returns a list of 'mdinfo' identifying | |
766 | * the device, or devices as there might be multiple missing | |
767 | * devices and multiple spares available. | |
768 | */ | |
769 | struct mdinfo *(*activate_spare)(struct active_array *a, | |
770 | struct metadata_update **updates); | |
2cda7640 ML |
771 | /* |
772 | * Return statically allocated string that represents metadata specific | |
773 | * controller domain of the disk. The domain is used in disk domain | |
774 | * matching functions. Disks belong to the same domain if the they have | |
775 | * the same domain from mdadm.conf and belong the same metadata domain. | |
776 | * Returning NULL or not providing this handler means that metadata | |
777 | * does not distinguish the differences between disks that belong to | |
778 | * different controllers. They are in the domain specified by | |
779 | * configuration file (mdadm.conf). | |
780 | * In case when the metadata has the notion of domains based on disk | |
781 | * it shall return NULL for disks that do not belong to the controller | |
782 | * the supported domains. Such disks will form another domain and won't | |
783 | * be mixed with supported ones. | |
784 | */ | |
785 | const char *(*get_disk_controller_domain)(const char *path); | |
549e9569 | 786 | |
f277ce36 | 787 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
d03373f1 | 788 | int external; |
4cce4069 | 789 | const char *name; /* canonical metadata name */ |
0f22b998 | 790 | } *superlist[]; |
82d9eba6 | 791 | |
0f22b998 N |
792 | extern struct superswitch super0, super1; |
793 | extern struct superswitch super_imsm, super_ddf; | |
0592faeb | 794 | extern struct superswitch mbr, gpt; |
cdddbdbc | 795 | |
edd8d13c NB |
796 | struct metadata_update { |
797 | int len; | |
798 | char *buf; | |
799 | void *space; /* allocated space that monitor will use */ | |
cb23f1f4 N |
800 | void **space_list; /* list of allocated spaces that monitor can |
801 | * use or that it returned. | |
802 | */ | |
edd8d13c NB |
803 | struct metadata_update *next; |
804 | }; | |
805 | ||
6adfd3af NB |
806 | /* A supertype holds a particular collection of metadata. |
807 | * It identifies the metadata type by the superswitch, and the particular | |
808 | * sub-version of that metadata type. | |
809 | * metadata read in or created is stored in 'sb' and 'info'. | |
810 | * There are also fields used by mdmon to track containers. | |
811 | * | |
352452c3 N |
812 | * A supertype may refer to: |
813 | * Just an array, possibly in a container | |
814 | * A container, not identifying any particular array | |
815 | * Info read from just one device, not yet fully describing the array/container. | |
816 | * | |
817 | * | |
6adfd3af NB |
818 | * A supertype is created by: |
819 | * super_by_fd | |
820 | * guess_super | |
821 | * dup_super | |
822 | */ | |
82d9eba6 NB |
823 | struct supertype { |
824 | struct superswitch *ss; | |
825 | int minor_version; | |
ea329559 | 826 | int max_devs; |
2f6079dc | 827 | int container_dev; /* devnum of container */ |
64557c33 | 828 | void *sb; |
111d01fc | 829 | void *info; |
549e9569 | 830 | |
edd8d13c NB |
831 | struct metadata_update *updates; |
832 | struct metadata_update **update_tail; | |
833 | ||
549e9569 NB |
834 | /* extra stuff used by mdmon */ |
835 | struct active_array *arrays; | |
549e9569 | 836 | int sock; /* listen to external programs */ |
549e9569 NB |
837 | int devnum; |
838 | char *devname; /* e.g. md0. This appears in metadata_verison: | |
839 | * external:/md0/12 | |
840 | */ | |
841 | int devcnt; | |
842 | ||
843 | struct mdinfo *devs; | |
844 | ||
82d9eba6 | 845 | }; |
f9ce90ba | 846 | |
4725bc31 | 847 | extern struct supertype *super_by_fd(int fd, char **subarray); |
54887ad8 N |
848 | enum guess_types { guess_any, guess_array, guess_partitions }; |
849 | extern struct supertype *guess_super_type(int fd, enum guess_types guess_type); | |
850 | static inline struct supertype *guess_super(int fd) { | |
851 | return guess_super_type(fd, guess_any); | |
852 | } | |
3da92f27 | 853 | extern struct supertype *dup_super(struct supertype *st); |
beae1dfe | 854 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
3a371610 | 855 | extern int must_be_container(int fd); |
0f0749ad | 856 | extern int dev_size_from_id(dev_t id, unsigned long long *size); |
8382f19b NB |
857 | extern void get_one_disk(int mdfd, mdu_array_info_t *ainf, |
858 | mdu_disk_info_t *disk); | |
a7c6e3fb | 859 | void wait_for(char *dev, int fd); |
f9ce90ba | 860 | |
5527fc74 N |
861 | /* |
862 | * Data structures for policy management. | |
863 | * Each device can have a policy structure that lists | |
864 | * various name/value pairs each possibly with a metadata associated. | |
865 | * The policy list is sorted by name/value/metadata | |
866 | */ | |
867 | struct dev_policy { | |
868 | struct dev_policy *next; | |
869 | char *name; /* None of these strings are allocated. They are | |
870 | * all just references to strings which are known | |
871 | * to exist elsewhere. | |
872 | * name and metadata can be compared by address equality. | |
873 | */ | |
874 | const char *metadata; | |
2cda7640 | 875 | const char *value; |
5527fc74 N |
876 | }; |
877 | ||
4e8d9f0a | 878 | extern char pol_act[], pol_domain[], pol_metadata[], pol_auto[]; |
5527fc74 N |
879 | |
880 | /* iterate over the sublist starting at list, having the same | |
881 | * 'name' as 'list', and matching the given metadata (Where | |
882 | * NULL matches anything | |
883 | */ | |
884 | #define pol_for_each(item, list, _metadata) \ | |
885 | for (item = list; \ | |
886 | item && item->name == list->name; \ | |
887 | item = item->next) \ | |
888 | if (!(!_metadata || !item->metadata || _metadata == item->metadata)) \ | |
889 | ; else | |
890 | ||
891 | /* | |
892 | * policy records read from mdadm are largely just name-value pairs. | |
893 | * The names are constants, not strdupped | |
894 | */ | |
895 | struct pol_rule { | |
896 | struct pol_rule *next; | |
897 | char *type; /* rule_policy or rule_part */ | |
898 | struct rule { | |
899 | struct rule *next; | |
900 | char *name; | |
901 | char *value; | |
902 | char *dups; /* duplicates of 'value' with a partNN appended */ | |
903 | } *rule; | |
904 | }; | |
905 | ||
906 | extern char rule_policy[], rule_part[]; | |
907 | extern char rule_path[], rule_type[]; | |
908 | extern char type_part[], type_disk[]; | |
909 | ||
910 | extern void policyline(char *line, char *type); | |
4e8d9f0a | 911 | extern void policy_add(char *type, ...); |
5527fc74 N |
912 | extern void policy_free(void); |
913 | ||
73c9c47c | 914 | extern struct dev_policy *path_policy(char *path, char *type); |
5527fc74 | 915 | extern struct dev_policy *disk_policy(struct mdinfo *disk); |
4e8d9f0a | 916 | extern struct dev_policy *devnum_policy(int dev); |
5527fc74 N |
917 | extern void dev_policy_free(struct dev_policy *p); |
918 | ||
e78dda3b N |
919 | //extern void pol_new(struct dev_policy **pol, char *name, char *val, char *metadata); |
920 | extern void pol_add(struct dev_policy **pol, char *name, char *val, char *metadata); | |
5527fc74 N |
921 | extern struct dev_policy *pol_find(struct dev_policy *pol, char *name); |
922 | ||
e3bb5f14 N |
923 | enum policy_action { |
924 | act_default, | |
925 | act_include, | |
926 | act_re_add, | |
d2db3045 N |
927 | act_spare, /* This only applies to bare devices */ |
928 | act_spare_same_slot, /* this allows non-bare devices, | |
929 | * but only if recent removal */ | |
930 | act_force_spare, /* this allow non-bare devices in any case */ | |
e3bb5f14 N |
931 | act_err |
932 | }; | |
933 | ||
934 | extern int policy_action_allows(struct dev_policy *plist, const char *metadata, | |
935 | enum policy_action want); | |
936 | extern int disk_action_allows(struct mdinfo *disk, const char *metadata, | |
937 | enum policy_action want); | |
f5f12c84 N |
938 | |
939 | struct domainlist { | |
940 | struct domainlist *next; | |
2cda7640 | 941 | const char *dom; |
f5f12c84 N |
942 | }; |
943 | ||
944 | extern int domain_test(struct domainlist *dom, struct dev_policy *pol, | |
945 | const char *metadata); | |
946 | extern struct domainlist *domain_from_array(struct mdinfo *mdi, | |
947 | const char *metadata); | |
e78dda3b N |
948 | extern void domainlist_add_dev(struct domainlist **dom, int devnum, |
949 | const char *metadata); | |
f5f12c84 N |
950 | extern void domain_free(struct domainlist *dl); |
951 | extern void domain_merge(struct domainlist **domp, struct dev_policy *pol, | |
952 | const char *metadata); | |
e78dda3b | 953 | void domain_add(struct domainlist **domp, char *domain); |
f5f12c84 | 954 | |
403410eb PC |
955 | extern void policy_save_path(char *id_path, struct map_ent *array); |
956 | extern int policy_check_path(struct mdinfo *disk, struct map_ent *array); | |
957 | ||
838acbc2 NB |
958 | #if __GNUC__ < 3 |
959 | struct stat64; | |
960 | #endif | |
961 | ||
45e878bb NB |
962 | #define HAVE_NFTW we assume |
963 | #define HAVE_FTW | |
964 | ||
2df1f269 | 965 | #ifdef __UCLIBC__ |
45e878bb | 966 | # include <features.h> |
2df1f269 BRF |
967 | # ifndef __UCLIBC_HAS_LFS__ |
968 | # define lseek64 lseek | |
969 | # endif | |
45e878bb NB |
970 | # ifndef __UCLIBC_HAS_FTW__ |
971 | # undef HAVE_FTW | |
972 | # undef HAVE_NFTW | |
973 | # endif | |
974 | #endif | |
975 | ||
976 | #ifdef __dietlibc__ | |
977 | # undef HAVE_NFTW | |
978 | #endif | |
979 | ||
e39b673e | 980 | #if defined(__KLIBC__) |
981 | # undef HAVE_NFTW | |
982 | # undef HAVE_FTW | |
983 | #endif | |
984 | ||
45e878bb | 985 | #ifndef HAVE_NFTW |
173fc515 | 986 | # define FTW_PHYS 1 |
45e878bb NB |
987 | # ifndef HAVE_FTW |
988 | struct FTW {}; | |
173fc515 NB |
989 | # endif |
990 | #endif | |
991 | ||
45e878bb NB |
992 | #ifdef HAVE_FTW |
993 | # include <ftw.h> | |
994 | #endif | |
995 | ||
173fc515 NB |
996 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); |
997 | ||
f9ce90ba | 998 | |
64c4757e | 999 | extern int Manage_ro(char *devname, int fd, int readonly); |
91f068bf | 1000 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); |
dd0781e5 | 1001 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); |
64c4757e | 1002 | extern int Manage_subdevs(char *devname, int fd, |
833bb0f8 N |
1003 | struct mddev_dev *devlist, int verbose, int test, |
1004 | char *update); | |
1f48664b | 1005 | extern int autodetect(void); |
e5329c37 | 1006 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
8fac0577 | 1007 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force); |
06b0d786 | 1008 | extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file, |
e86c9dd6 | 1009 | long long size, |
691a36b7 | 1010 | int level, char *layout_str, int chunksize, int raid_disks, |
e2e53a2d | 1011 | struct mddev_dev *devlist, |
691a36b7 | 1012 | int force); |
06b0d786 | 1013 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
ea0ebe96 | 1014 | int *fdlist, int cnt, char *backup_file, int verbose); |
e9e43ec3 N |
1015 | extern int Grow_continue(int mdfd, struct supertype *st, |
1016 | struct mdinfo *info, char *backup_file); | |
64c4757e | 1017 | |
7f91af49 | 1018 | extern int Assemble(struct supertype *st, char *mddev, |
fa56eddb | 1019 | struct mddev_ident *ident, |
87f26d14 N |
1020 | struct mddev_dev *devlist, |
1021 | char *backup_file, int invalid_backup, | |
64c4757e | 1022 | int readonly, int runstop, |
0ac91628 | 1023 | char *update, char *homehost, int require_homehost, |
64c4757e NB |
1024 | int verbose, int force); |
1025 | ||
7f91af49 | 1026 | extern int Build(char *mddev, int chunk, int level, int layout, |
a655e550 | 1027 | int raiddisks, struct mddev_dev *devlist, int assume_clean, |
7f91af49 | 1028 | char *bitmap_file, int bitmap_chunk, int write_behind, |
83208785 | 1029 | int delay, int verbose, int autof, unsigned long long size); |
64c4757e NB |
1030 | |
1031 | ||
7f91af49 | 1032 | extern int Create(struct supertype *st, char *mddev, |
5dd497ee | 1033 | int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, |
3d3dd91e | 1034 | char *name, char *homehost, int *uuid, |
a655e550 | 1035 | int subdevs, struct mddev_dev *devlist, |
47d79ef8 | 1036 | int runstop, int verbose, int force, int assume_clean, |
7f91af49 | 1037 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int autof); |
64c4757e | 1038 | |
54bad364 | 1039 | extern int Detail(char *dev, int brief, int export, int test, char *homehost); |
4cce4069 | 1040 | extern int Detail_Platform(struct superswitch *ss, int scan, int verbose); |
e0d19036 | 1041 | extern int Query(char *dev); |
a655e550 | 1042 | extern int Examine(struct mddev_dev *devlist, int brief, int export, int scan, |
0d726f17 | 1043 | int SparcAdjust, struct supertype *forcest, char *homehost); |
a655e550 | 1044 | extern int Monitor(struct mddev_dev *devlist, |
e0d19036 | 1045 | char *mailaddr, char *alert_cmd, |
aa88f531 | 1046 | int period, int daemonise, int scan, int oneshot, |
edde9560 AC |
1047 | int dosyslog, int test, char *pidfile, int increments, |
1048 | int share); | |
64c4757e | 1049 | |
9277cc77 | 1050 | extern int Kill(char *dev, struct supertype *st, int force, int quiet, int noexcl); |
33414a01 | 1051 | extern int Kill_subarray(char *dev, char *subarray, int quiet); |
fa56eddb | 1052 | extern int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident *ident, int quiet); |
b90c0e9a | 1053 | extern int Wait(char *dev); |
9f1da824 | 1054 | extern int WaitClean(char *dev, int sock, int verbose); |
9a9dab36 | 1055 | |
8382f19b | 1056 | extern int Incremental(char *devname, int verbose, int runstop, |
0ac91628 N |
1057 | struct supertype *st, char *homehost, int require_homehost, |
1058 | int autof); | |
8382f19b NB |
1059 | extern void RebuildMap(void); |
1060 | extern int IncrementalScan(int verbose); | |
950bc344 | 1061 | extern int IncrementalRemove(char *devname, char *path, int verbose); |
c82f047c NB |
1062 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
1063 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 1064 | unsigned long write_behind, |
dcec9ee5 NB |
1065 | unsigned long long array_size, |
1066 | int major); | |
55935d51 | 1067 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
20b60dcd | 1068 | extern int Write_rules(char *rule_name); |
bf4fb153 | 1069 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
2a528478 | 1070 | extern unsigned long bitmap_sectors(struct bitmap_super_s *bsb); |
c82f047c | 1071 | |
64c4757e | 1072 | extern int md_get_version(int fd); |
e0d19036 | 1073 | extern int get_linux_version(void); |
bc77ed53 | 1074 | extern int mdadm_version(char *version); |
84e11361 | 1075 | extern long long parse_size(char *size); |
64c4757e | 1076 | extern int parse_uuid(char *str, int uuid[4]); |
4a06e2c2 N |
1077 | extern int parse_layout_10(char *layout); |
1078 | extern int parse_layout_faulty(char *layout); | |
682c7051 NB |
1079 | extern int check_ext2(int fd, char *name); |
1080 | extern int check_reiser(int fd, char *name); | |
1081 | extern int check_raid(int fd, char *name); | |
53ed6ac3 KW |
1082 | extern int check_partitions(int fd, char *dname, |
1083 | unsigned long long freesize, | |
1084 | unsigned long long size); | |
64c4757e | 1085 | |
dd0781e5 | 1086 | extern int get_mdp_major(void); |
8b0dabea | 1087 | extern int dev_open(char *dev, int flags); |
e8a70c89 | 1088 | extern int open_dev(int devnum); |
a931db9e | 1089 | extern int open_dev_excl(int devnum); |
8d80900b | 1090 | extern int is_standard(char *dev, int *nump); |
9008ed1c | 1091 | extern int same_dev(char *one, char *two); |
dd0781e5 | 1092 | |
f1ae21c4 | 1093 | extern int parse_auto(char *str, char *msg, int config); |
fa56eddb | 1094 | extern struct mddev_ident *conf_get_ident(char *dev); |
a655e550 | 1095 | extern struct mddev_dev *conf_get_devs(void); |
8382f19b | 1096 | extern int conf_test_dev(char *devname); |
4e8d9f0a | 1097 | extern int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost); |
8aec876d NB |
1098 | extern struct createinfo *conf_get_create_info(void); |
1099 | extern void set_conffile(char *file); | |
1100 | extern char *conf_get_mailaddr(void); | |
1101 | extern char *conf_get_mailfrom(void); | |
1102 | extern char *conf_get_program(void); | |
0ac91628 | 1103 | extern char *conf_get_homehost(int *require_homehostp); |
e0d19036 | 1104 | extern char *conf_line(FILE *file); |
98c6faba | 1105 | extern char *conf_word(FILE *file, int allow_key); |
0ac91628 N |
1106 | extern int conf_name_is_free(char *name); |
1107 | extern int devname_matches(char *name, char *match); | |
fa56eddb | 1108 | extern struct mddev_ident *conf_match(struct mdinfo *info, struct supertype *st); |
6d11ec6f | 1109 | extern int experimental(void); |
0ac91628 | 1110 | |
e0d19036 NB |
1111 | extern void free_line(char *line); |
1112 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 1113 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
22e263f6 | 1114 | extern const int uuid_zero[4]; |
f277ce36 | 1115 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
350f29f9 | 1116 | extern void copy_uuid(void *a, int b[4], int swapuuid); |
aae5a112 | 1117 | extern char *__fname_from_uuid(int id[4], int swap, char *buf, char sep); |
d7288ddc | 1118 | extern char *fname_from_uuid(struct supertype *st, |
ff54de6e | 1119 | struct mdinfo *info, char *buf, char sep); |
4b1ac34b | 1120 | extern unsigned long calc_csum(void *super, int bytes); |
583315d9 | 1121 | extern int enough(int level, int raid_disks, int layout, int clean, |
265e0f17 | 1122 | char *avail, int avail_disks); |
8453e704 | 1123 | extern int enough_fd(int fd); |
e0d19036 | 1124 | extern int ask(char *mesg); |
8fac0577 | 1125 | extern unsigned long long get_component_size(int fd); |
0430ed48 | 1126 | extern void remove_partitions(int fd); |
691c6ee1 | 1127 | extern int test_partition(int fd); |
bfd76b93 | 1128 | extern int test_partition_from_id(dev_t id); |
5f8097be NB |
1129 | extern unsigned long long calc_array_size(int level, int raid_disks, int layout, |
1130 | int chunksize, unsigned long long devsize); | |
edd8d13c NB |
1131 | extern int flush_metadata_updates(struct supertype *st); |
1132 | extern void append_metadata_update(struct supertype *st, void *buf, int len); | |
6234c63c DW |
1133 | extern int assemble_container_content(struct supertype *st, int mdfd, |
1134 | struct mdinfo *content, int runstop, | |
49680258 N |
1135 | char *chosen_name, int verbose, |
1136 | char *backup_file); | |
326727d9 AC |
1137 | extern struct mdinfo *container_choose_spares(struct supertype *st, |
1138 | unsigned long long min_size, | |
1139 | struct domainlist *domlist, | |
1140 | char *spare_group, | |
1141 | const char *metadata, int get_one); | |
d52bb542 | 1142 | extern int move_spare(char *from_devname, char *to_devname, dev_t devid); |
7801ac20 N |
1143 | extern int add_disk(int mdfd, struct supertype *st, |
1144 | struct mdinfo *sra, struct mdinfo *info); | |
de6ae750 N |
1145 | extern int remove_disk(int mdfd, struct supertype *st, |
1146 | struct mdinfo *sra, struct mdinfo *info); | |
f35f2525 | 1147 | extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info); |
1e5c6983 | 1148 | unsigned long long min_recovery_start(struct mdinfo *array); |
cd29a5c8 | 1149 | |
56eb10c0 | 1150 | extern char *human_size(long long bytes); |
e4965ef8 N |
1151 | extern char *human_size_brief(long long bytes); |
1152 | extern void print_r10_layout(int layout); | |
e0d19036 | 1153 | |
63152c1b NB |
1154 | #define NoMdDev (1<<23) |
1155 | extern int find_free_devnum(int use_partitions); | |
1156 | ||
e0d19036 NB |
1157 | extern void put_md_name(char *name); |
1158 | extern char *get_md_name(int dev); | |
1159 | ||
c913b90e | 1160 | extern char DefaultConfFile[]; |
b5e64645 | 1161 | |
69207ff6 N |
1162 | extern int create_mddev(char *dev, char *name, int autof, int trustworthy, |
1163 | char *chosen); | |
1164 | /* values for 'trustworthy' */ | |
1165 | #define LOCAL 1 | |
d1d3482b | 1166 | #define LOCAL_ANY 10 |
69207ff6 N |
1167 | #define FOREIGN 2 |
1168 | #define METADATA 3 | |
6be1d39d | 1169 | extern int open_mddev(char *dev, int report_errors); |
a322f70c | 1170 | extern int open_container(int fd); |
33414a01 DW |
1171 | extern int is_container_member(struct mdstat_ent *ent, char *devname); |
1172 | extern int is_subarray_active(char *subarray, char *devname); | |
feab51f8 | 1173 | extern int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet); |
33414a01 | 1174 | extern struct superswitch *version_to_superswitch(char *vers); |
b5e64645 | 1175 | |
a931db9e | 1176 | extern int mdmon_running(int devnum); |
24f6f99b | 1177 | extern int mdmon_pid(int devnum); |
40ebbb9c | 1178 | extern int check_env(char *name); |
148acb7b | 1179 | extern __u32 random32(void); |
8850ee3e | 1180 | extern int start_mdmon(int devnum); |
a931db9e | 1181 | |
999b4972 N |
1182 | extern int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, |
1183 | struct supertype *st, unsigned long stripes, | |
1184 | int *fds, unsigned long long *offsets, | |
1185 | int dests, int *destfd, unsigned long long *destoffsets); | |
1186 | ||
2f6079dc | 1187 | extern char *devnum2devname(int num); |
11877f4d | 1188 | extern void fmt_devname(char *name, int num); |
77472ff8 | 1189 | extern int devname2devnum(char *name); |
c94709e8 | 1190 | extern int stat2devnum(struct stat *st); |
2f6079dc | 1191 | extern int fd2devnum(int fd); |
b5e64645 | 1192 | |
a931db9e NB |
1193 | static inline int dev2major(int d) |
1194 | { | |
1195 | if (d >= 0) | |
1196 | return MD_MAJOR; | |
1197 | else | |
1198 | return get_mdp_major(); | |
1199 | } | |
1200 | ||
1201 | static inline int dev2minor(int d) | |
1202 | { | |
1203 | if (d >= 0) | |
1204 | return d; | |
1205 | return (-1-d) << MdpMinorShift; | |
1206 | } | |
1207 | ||
6416d527 NB |
1208 | static inline int ROUND_UP(int a, int base) |
1209 | { | |
1210 | return ((a+base-1)/base)*base; | |
1211 | } | |
1212 | ||
3c558363 N |
1213 | static inline int is_subarray(char *vers) |
1214 | { | |
e9dd1598 N |
1215 | /* The version string for a 'subarray' (an array in a container) |
1216 | * is | |
1217 | * /containername/componentname for normal read-write arrays | |
746a6567 N |
1218 | * -containername/componentname for arrays which mdmon must not |
1219 | * reconfigure. They might be read-only | |
1220 | * or might be undergoing reshape etc. | |
e9dd1598 N |
1221 | * containername is e.g. md0, md_d1 |
1222 | * componentname is dependant on the metadata. e.g. '1' 'S1' ... | |
1223 | */ | |
1224 | return (*vers == '/' || *vers == '-'); | |
3c558363 N |
1225 | } |
1226 | ||
e5408a32 DW |
1227 | static inline char *to_subarray(struct mdstat_ent *ent, char *container) |
1228 | { | |
1229 | return &ent->metadata_version[10+strlen(container)+1]; | |
1230 | } | |
1231 | ||
2a24d7b6 DW |
1232 | #ifdef DEBUG |
1233 | #define dprintf(fmt, arg...) \ | |
1234 | fprintf(stderr, fmt, ##arg) | |
1235 | #else | |
1236 | #define dprintf(fmt, arg...) \ | |
1237 | ({ if (0) fprintf(stderr, fmt, ##arg); 0; }) | |
1238 | #endif | |
1a0ee0ba DK |
1239 | #include <assert.h> |
1240 | #include <stdarg.h> | |
1241 | static inline int xasprintf(char **strp, const char *fmt, ...) { | |
1242 | va_list ap; | |
1243 | int ret; | |
1244 | va_start(ap, fmt); | |
089485cb | 1245 | ret = vasprintf(strp, fmt, ap); |
1a0ee0ba DK |
1246 | va_end(ap); |
1247 | assert(ret >= 0); | |
1248 | return ret; | |
1249 | } | |
2a24d7b6 | 1250 | |
b5e64645 NB |
1251 | #define LEVEL_MULTIPATH (-4) |
1252 | #define LEVEL_LINEAR (-1) | |
1253 | #define LEVEL_FAULTY (-5) | |
1254 | ||
17f25ca6 NB |
1255 | /* kernel module doesn't know about these */ |
1256 | #define LEVEL_CONTAINER (-100) | |
a322f70c | 1257 | #define LEVEL_UNSUPPORTED (-200) |
17f25ca6 | 1258 | |
b5e64645 NB |
1259 | |
1260 | /* faulty stuff */ | |
1261 | ||
1262 | #define WriteTransient 0 | |
1263 | #define ReadTransient 1 | |
1264 | #define WritePersistent 2 | |
1265 | #define ReadPersistent 3 | |
1266 | #define WriteAll 4 /* doesn't go to device */ | |
1267 | #define ReadFixable 5 | |
1268 | #define Modes 6 | |
1269 | ||
1270 | #define ClearErrors 31 | |
1271 | #define ClearFaults 30 | |
1272 | ||
1273 | #define AllPersist 100 /* internal use only */ | |
1274 | #define NoPersist 101 | |
1275 | ||
1276 | #define ModeMask 0x1f | |
1277 | #define ModeShift 5 | |
fe6729fa NB |
1278 | |
1279 | ||
1280 | #ifdef __TINYC__ | |
1281 | #undef minor | |
1282 | #undef major | |
1283 | #undef makedev | |
1284 | #define minor(x) ((x)&0xff) | |
1285 | #define major(x) (((x)>>8)&0xff) | |
1286 | #define makedev(M,m) (((M)<<8) | (m)) | |
1287 | #endif | |
1288 | ||
b640a252 | 1289 | /* for raid4/5/6 */ |
e86c9dd6 NB |
1290 | #define ALGORITHM_LEFT_ASYMMETRIC 0 |
1291 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
1292 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
1293 | #define ALGORITHM_RIGHT_SYMMETRIC 3 | |
b640a252 N |
1294 | |
1295 | /* Define non-rotating (raid4) algorithms. These allow | |
1296 | * conversion of raid4 to raid5. | |
1297 | */ | |
1298 | #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */ | |
1299 | #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */ | |
1300 | ||
1301 | /* DDF RAID6 layouts differ from md/raid6 layouts in two ways. | |
1302 | * Firstly, the exact positioning of the parity block is slightly | |
1303 | * different between the 'LEFT_*' modes of md and the "_N_*" modes | |
1304 | * of DDF. | |
1305 | * Secondly, or order of datablocks over which the Q syndrome is computed | |
1306 | * is different. | |
1307 | * Consequently we have different layouts for DDF/raid6 than md/raid6. | |
1308 | * These layouts are from the DDFv1.2 spec. | |
1309 | * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but | |
1310 | * leaves RLQ=3 as 'Vendor Specific' | |
1311 | */ | |
1312 | ||
1313 | #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */ | |
1314 | #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */ | |
1315 | #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */ | |
1316 | ||
1317 | ||
1318 | /* For every RAID5 algorithm we define a RAID6 algorithm | |
1319 | * with exactly the same layout for data and parity, and | |
1320 | * with the Q block always on the last device (N-1). | |
1321 | * This allows trivial conversion from RAID5 to RAID6 | |
1322 | */ | |
1323 | #define ALGORITHM_LEFT_ASYMMETRIC_6 16 | |
1324 | #define ALGORITHM_RIGHT_ASYMMETRIC_6 17 | |
1325 | #define ALGORITHM_LEFT_SYMMETRIC_6 18 | |
1326 | #define ALGORITHM_RIGHT_SYMMETRIC_6 19 | |
1327 | #define ALGORITHM_PARITY_0_6 20 | |
1328 | #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N | |
1329 | ||
33a6535d AW |
1330 | /* Define PATH_MAX in case we don't use glibc or standard library does |
1331 | * not have PATH_MAX defined. Assume max path length is 4K characters. | |
1332 | */ | |
1333 | #ifndef PATH_MAX | |
1334 | #define PATH_MAX 4096 | |
1335 | #endif | |
1336 |