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Commit | Line | Data |
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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
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 | */ | |
81219e70 LM |
197 | #define NO_RESHAPE 0 |
198 | #define VOLUME_RESHAPE 1 | |
199 | #define CONTAINER_RESHAPE 2 | |
353632d9 NB |
200 | int reshape_active; |
201 | unsigned long long reshape_progress; | |
6e75048b AK |
202 | int recovery_blocked; /* for external metadata it |
203 | * indicates that there is | |
204 | * reshape in progress in | |
205 | * container, | |
206 | * for native metadata it is | |
207 | * reshape_active field mirror | |
208 | */ | |
e1516be1 DW |
209 | union { |
210 | unsigned long long resync_start; /* per-array resync position */ | |
211 | unsigned long long recovery_start; /* per-device rebuild position */ | |
b7528a20 | 212 | #define MaxSector (~0ULL) /* resync/recovery complete position */ |
e1516be1 | 213 | }; |
a67dd8cc | 214 | unsigned long safe_mode_delay; /* ms delay to mark clean */ |
353632d9 | 215 | int new_level, delta_disks, new_layout, new_chunk; |
06c7f68e | 216 | int errors; |
f21e18ca | 217 | unsigned long cache_size; /* size of raid456 stripe cache*/ |
7e0f6979 NB |
218 | int mismatch_cnt; |
219 | char text_version[50]; | |
6e46bf34 DW |
220 | void *update_private; /* for passing metadata-format |
221 | * specific update data | |
222 | * between successive calls to | |
223 | * update_super() | |
224 | */ | |
dd15dc4a NB |
225 | |
226 | int container_member; /* for assembling external-metatdata arrays | |
227 | * This is to be used internally by metadata | |
228 | * handler only */ | |
97b4d0e9 DW |
229 | int container_enough; /* flag external handlers can set to |
230 | * indicate that subarrays have not enough (-1), | |
231 | * enough to start (0), or all expected disks (1) */ | |
06c7f68e | 232 | char sys_name[20]; |
7e0f6979 | 233 | struct mdinfo *devs; |
06c7f68e | 234 | struct mdinfo *next; |
549e9569 NB |
235 | |
236 | /* Device info for mdmon: */ | |
e1516be1 | 237 | int recovery_fd; |
549e9569 | 238 | int state_fd; |
8d45d196 DW |
239 | #define DS_FAULTY 1 |
240 | #define DS_INSYNC 2 | |
241 | #define DS_WRITE_MOSTLY 4 | |
242 | #define DS_SPARE 8 | |
243 | #define DS_BLOCKED 16 | |
244 | #define DS_REMOVE 1024 | |
92967543 | 245 | #define DS_UNBLOCK 2048 |
549e9569 NB |
246 | int prev_state, curr_state, next_state; |
247 | ||
4b1ac34b NB |
248 | }; |
249 | ||
5bbb4842 NB |
250 | struct createinfo { |
251 | int uid; | |
252 | int gid; | |
253 | int autof; | |
254 | int mode; | |
38098016 | 255 | int symlinks; |
058574b1 | 256 | struct supertype *supertype; |
5bbb4842 NB |
257 | }; |
258 | ||
9a9dab36 | 259 | #define Name "mdadm" |
682c7051 | 260 | |
e0d19036 NB |
261 | enum mode { |
262 | ASSEMBLE=1, | |
263 | BUILD, | |
264 | CREATE, | |
265 | MANAGE, | |
266 | MISC, | |
267 | MONITOR, | |
dd0781e5 | 268 | GROW, |
8382f19b | 269 | INCREMENTAL, |
1f48664b | 270 | AUTODETECT, |
e0d19036 NB |
271 | }; |
272 | ||
64c4757e | 273 | extern char short_options[]; |
024768c4 | 274 | extern char short_bitmap_options[]; |
c06487ce | 275 | extern char short_bitmap_auto_options[]; |
64c4757e | 276 | extern struct option long_options[]; |
56eedc1a | 277 | extern char Version[], Usage[], Help[], OptionHelp[], |
dd0781e5 | 278 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
8382f19b | 279 | Help_incr[], |
e0d19036 | 280 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 281 | |
997aed5d | 282 | /* for option that don't have short equivilents, we assign arbitrary |
1c7a808c | 283 | * numbers later than any 'short' character option. |
997aed5d NB |
284 | */ |
285 | enum special_options { | |
1c7a808c | 286 | AssumeClean = 300, |
997aed5d NB |
287 | BitmapChunk, |
288 | WriteBehind, | |
289 | ReAdd, | |
290 | NoDegraded, | |
291 | Sparc22, | |
1c7a808c | 292 | BackupFile, |
997aed5d | 293 | HomeHost, |
589395d6 | 294 | AutoHomeHost, |
38098016 | 295 | Symlinks, |
1f48664b | 296 | AutoDetect, |
1770662b | 297 | Waitclean, |
4cce4069 | 298 | DetailPlatform, |
33414a01 | 299 | KillSubarray, |
1c7a808c | 300 | UpdateSubarray, |
edde9560 | 301 | IncrementalPath, |
1c7a808c N |
302 | NoSharing, |
303 | HelpOptions, | |
304 | Brief, | |
305 | ManageOpt, | |
306 | Add, | |
307 | Remove, | |
308 | Fail, | |
309 | MiscOpt, | |
310 | WaitOpt, | |
311 | ConfigFile, | |
312 | ChunkSize, | |
313 | WriteMostly, | |
314 | Layout, | |
315 | Auto, | |
316 | Force, | |
317 | SuperMinor, | |
318 | EMail, | |
319 | ProgramOpt, | |
320 | Increment, | |
321 | Fork, | |
322 | Bitmap, | |
323 | RebuildMapOpt, | |
87f26d14 | 324 | InvalidBackup, |
20b60dcd | 325 | UdevRules, |
b76b30e0 | 326 | FreezeReshape, |
2dddadb0 | 327 | Continue, |
997aed5d NB |
328 | }; |
329 | ||
64c4757e | 330 | /* structures read from config file */ |
52826846 NB |
331 | /* List of mddevice names and identifiers |
332 | * Identifiers can be: | |
333 | * uuid=128-hex-uuid | |
334 | * super-minor=decimal-minor-number-from-superblock | |
335 | * devices=comma,separated,list,of,device,names,with,wildcards | |
336 | * | |
337 | * If multiple fields are present, the intersection of all matching | |
338 | * devices is considered | |
339 | */ | |
98c6faba | 340 | #define UnSet (0xfffe) |
fa56eddb | 341 | struct mddev_ident { |
dd0781e5 | 342 | char *devname; |
aba69144 | 343 | |
dd0781e5 | 344 | int uuid_set; |
3fa06e9d | 345 | int uuid[4]; |
947fd4dd | 346 | char name[33]; |
52826846 | 347 | |
f21e18ca | 348 | int super_minor; |
52826846 | 349 | |
dd0781e5 | 350 | char *devices; /* comma separated list of device |
52826846 NB |
351 | * names with wild cards |
352 | */ | |
dd0781e5 | 353 | int level; |
f21e18ca N |
354 | int raid_disks; |
355 | int spare_disks; | |
82d9eba6 | 356 | struct supertype *st; |
dd0781e5 NB |
357 | int autof; /* 1 for normal, 2 for partitioned */ |
358 | char *spare_group; | |
7ef02d01 | 359 | char *bitmap_file; |
c82f047c | 360 | int bitmap_fd; |
dd0781e5 | 361 | |
1771a6e2 N |
362 | char *container; /* /dev/whatever name of container, or |
363 | * uuid of container. You would expect | |
364 | * this to be the 'devname' or UUID | |
dbb44303 N |
365 | * of some other entry. |
366 | */ | |
367 | char *member; /* subarray within a container */ | |
368 | ||
fa56eddb | 369 | struct mddev_ident *next; |
b179246f N |
370 | union { |
371 | /* fields needed by different users of this structure */ | |
372 | int assembled; /* set when assembly succeeds */ | |
373 | }; | |
fa56eddb | 374 | }; |
64c4757e NB |
375 | |
376 | /* List of device names - wildcards expanded */ | |
a655e550 | 377 | struct mddev_dev { |
64c4757e | 378 | char *devname; |
1c7a808c | 379 | int disposition; /* 'a' for add, 'r' for remove, 'f' for fail. |
cd29a5c8 NB |
380 | * Not set for names read from .config |
381 | */ | |
b3d31955 | 382 | char writemostly; /* 1 for 'set writemostly', 2 for 'clear writemostly' */ |
fe80f49b | 383 | char re_add; |
811e6cbe | 384 | char used; /* set when used */ |
a655e550 N |
385 | struct mddev_dev *next; |
386 | }; | |
64c4757e | 387 | |
682c7051 NB |
388 | typedef struct mapping { |
389 | char *name; | |
390 | int num; | |
391 | } mapping_t; | |
392 | ||
e0d19036 NB |
393 | |
394 | struct mdstat_ent { | |
395 | char *dev; | |
396 | int devnum; | |
397 | int active; | |
398 | char *level; | |
399 | char *pattern; /* U or up, _ for down */ | |
400 | int percent; /* -1 if no resync */ | |
f94c116f | 401 | int resync; /* 3 if check, 2 if reshape, 1 if resync, 0 if recovery */ |
549e9569 NB |
402 | int devcnt; |
403 | int raid_disks; | |
549e9569 | 404 | char * metadata_version; |
3b57c466 N |
405 | struct dev_member { |
406 | char *name; | |
407 | struct dev_member *next; | |
408 | } *members; | |
e0d19036 NB |
409 | struct mdstat_ent *next; |
410 | }; | |
411 | ||
22a88995 | 412 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
e0d19036 | 413 | extern void free_mdstat(struct mdstat_ent *ms); |
dd0781e5 | 414 | extern void mdstat_wait(int seconds); |
58a4ba2a | 415 | extern void mdstat_wait_fd(int fd, const sigset_t *sigmask); |
8382f19b | 416 | extern int mddev_busy(int devnum); |
3b57c466 | 417 | extern struct mdstat_ent *mdstat_by_component(char *name); |
78b10e66 | 418 | extern struct mdstat_ent *mdstat_by_subdev(char *subdev, int container); |
8382f19b NB |
419 | |
420 | struct map_ent { | |
421 | struct map_ent *next; | |
422 | int devnum; | |
1522c538 | 423 | char metadata[20]; |
8382f19b | 424 | int uuid[4]; |
195254b8 | 425 | int bad; |
8382f19b NB |
426 | char *path; |
427 | }; | |
1522c538 | 428 | extern int map_update(struct map_ent **mpp, int devnum, char *metadata, |
8382f19b | 429 | int uuid[4], char *path); |
4eb26970 | 430 | extern void map_remove(struct map_ent **map, int devnum); |
8382f19b | 431 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); |
f2e55ecc N |
432 | extern struct map_ent *map_by_devnum(struct map_ent **map, int devnum); |
433 | extern struct map_ent *map_by_name(struct map_ent **map, char *name); | |
8382f19b NB |
434 | extern void map_read(struct map_ent **melp); |
435 | extern int map_write(struct map_ent *mel); | |
436 | extern void map_delete(struct map_ent **mapp, int devnum); | |
437 | extern void map_free(struct map_ent *map); | |
438 | extern void map_add(struct map_ent **melp, | |
1522c538 | 439 | int devnum, char *metadata, int uuid[4], char *path); |
ad5bc697 N |
440 | extern int map_lock(struct map_ent **melp); |
441 | extern void map_unlock(struct map_ent **melp); | |
cc700db3 | 442 | extern void map_fork(void); |
e0d19036 | 443 | |
e86c9dd6 | 444 | /* various details can be requested */ |
dab4a513 DW |
445 | enum sysfs_read_flags { |
446 | GET_LEVEL = (1 << 0), | |
447 | GET_LAYOUT = (1 << 1), | |
448 | GET_COMPONENT = (1 << 2), | |
449 | GET_CHUNK = (1 << 3), | |
450 | GET_CACHE = (1 << 4), | |
451 | GET_MISMATCH = (1 << 5), | |
452 | GET_VERSION = (1 << 6), | |
453 | GET_DISKS = (1 << 7), | |
454 | GET_DEGRADED = (1 << 8), | |
455 | GET_SAFEMODE = (1 << 9), | |
456 | GET_DEVS = (1 << 10), /* gets role, major, minor */ | |
457 | GET_OFFSET = (1 << 11), | |
458 | GET_SIZE = (1 << 12), | |
459 | GET_STATE = (1 << 13), | |
460 | GET_ERROR = (1 << 14), | |
dab4a513 | 461 | }; |
e86c9dd6 NB |
462 | |
463 | /* If fd >= 0, get the array it is open on, | |
464 | * else use devnum. >=0 -> major9. <0..... | |
465 | */ | |
549e9569 | 466 | extern int sysfs_open(int devnum, char *devname, char *attr); |
f35f2525 | 467 | extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum); |
7e0f6979 NB |
468 | extern void sysfs_free(struct mdinfo *sra); |
469 | extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options); | |
1770662b DW |
470 | extern int sysfs_attr_match(const char *attr, const char *str); |
471 | extern int sysfs_match_word(const char *word, char **list); | |
7e0f6979 | 472 | extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 473 | char *name, char *val); |
7e0f6979 | 474 | extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 475 | char *name, unsigned long long val); |
97590376 | 476 | extern int sysfs_uevent(struct mdinfo *sra, char *event); |
7236ee7a N |
477 | extern int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev, |
478 | char *name); | |
479 | extern int sysfs_fd_get_ll(int fd, unsigned long long *val); | |
7e0f6979 | 480 | extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 481 | char *name, unsigned long long *val); |
7236ee7a | 482 | extern int sysfs_fd_get_str(int fd, char *val, int size); |
bc77ed53 DW |
483 | extern int sysfs_attribute_available(struct mdinfo *sra, struct mdinfo *dev, |
484 | char *name); | |
93ecfa01 N |
485 | extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
486 | char *name, char *val, int size); | |
8ed3e5e1 | 487 | extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms); |
f35f2525 | 488 | extern int sysfs_set_array(struct mdinfo *info, int vers); |
2904b26f | 489 | extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume); |
f1665f72 | 490 | extern int sysfs_disk_to_scsi_id(int fd, __u32 *id); |
f94d52f4 | 491 | extern int sysfs_unique_holder(int devnum, long rdev); |
bc77ed53 | 492 | extern int sysfs_freeze_array(struct mdinfo *sra); |
c69b251b | 493 | extern int load_sys(char *path, char *buf); |
130994cb AK |
494 | extern int reshape_prepare_fdlist(char *devname, |
495 | struct mdinfo *sra, | |
496 | int raid_disks, | |
497 | int nrdisks, | |
498 | unsigned long blocks, | |
499 | char *backup_file, | |
500 | int *fdlist, | |
501 | unsigned long long *offsets); | |
502 | extern void reshape_free_fdlist(int *fdlist, | |
503 | unsigned long long *offsets, | |
504 | int size); | |
e6e9d47b AK |
505 | extern int reshape_open_backup_file(char *backup, |
506 | int fd, | |
507 | char *devname, | |
508 | long blocks, | |
509 | int *fdlist, | |
a93f87ee N |
510 | unsigned long long *offsets, |
511 | int restart); | |
1c009fc2 AK |
512 | extern unsigned long compute_backup_blocks(int nchunk, int ochunk, |
513 | unsigned int ndata, unsigned int odata); | |
e86c9dd6 NB |
514 | |
515 | extern int save_stripes(int *source, unsigned long long *offsets, | |
516 | int raid_disks, int chunk_size, int level, int layout, | |
517 | int nwrites, int *dest, | |
a6288483 N |
518 | unsigned long long start, unsigned long long length, |
519 | char *buf); | |
353632d9 NB |
520 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
521 | int raid_disks, int chunk_size, int level, int layout, | |
522 | int source, unsigned long long read_offset, | |
2fcb75ae AK |
523 | unsigned long long start, unsigned long long length, |
524 | char *src_buf); | |
e86c9dd6 | 525 | |
52826846 NB |
526 | #ifndef Sendmail |
527 | #define Sendmail "/usr/lib/sendmail -t" | |
528 | #endif | |
529 | ||
773135f5 NB |
530 | #define SYSLOG_FACILITY LOG_DAEMON |
531 | ||
682c7051 NB |
532 | extern char *map_num(mapping_t *map, int num); |
533 | extern int map_name(mapping_t *map, char *name); | |
b640a252 | 534 | extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[]; |
682c7051 | 535 | |
16c6fa80 | 536 | extern char *map_dev(int major, int minor, int create); |
64c4757e | 537 | |
549e9569 | 538 | struct active_array; |
2e735d19 | 539 | struct metadata_update; |
64c4757e | 540 | |
999b4972 N |
541 | |
542 | /* 'struct reshape' records the intermediate states | |
543 | * a general reshape. | |
544 | * The starting geometry is converted to the 'before' geometry | |
545 | * by at most an atomic level change. They could be the same. | |
546 | * Similarly the 'after' geometry is converted to the final | |
547 | * geometry by at most a level change. | |
548 | * Note that 'before' and 'after' must have the same level. | |
549 | * 'blocks' is the minimum number of sectors for a reshape unit. | |
550 | * This will be a multiple of the stripe size in each of the | |
551 | * 'before' and 'after' geometries. | |
552 | * If 'blocks' is 0, no restriping is necessary. | |
553 | */ | |
554 | struct reshape { | |
555 | int level; | |
556 | int parity; /* number of parity blocks/devices */ | |
557 | struct { | |
558 | int layout; | |
559 | int data_disks; | |
560 | } before, after; | |
561 | unsigned long long backup_blocks; | |
562 | unsigned long long stripes; /* number of old stripes that comprise 'blocks'*/ | |
563 | unsigned long long new_size; /* New size of array in sectors */ | |
564 | }; | |
565 | ||
6adfd3af NB |
566 | /* A superswitch provides entry point the a metadata handler. |
567 | * | |
568 | * The super_switch primarily operates on some "metadata" that | |
569 | * is accessed via the 'supertype'. | |
570 | * This metadata has one of three possible sources. | |
571 | * 1/ It is read from a single device. In this case it may not completely | |
572 | * describe the array or arrays as some information might be on other | |
573 | * devices. | |
574 | * 2/ It is read from all devices in a container. In this case all | |
575 | * information is present. | |
576 | * 3/ It is created by ->init_super / ->add_to_super. In this case it will | |
577 | * be complete once enough ->add_to_super calls have completed. | |
578 | * | |
579 | * When creating an array inside a container, the metadata will be | |
580 | * formed by a combination of 2 and 3. The metadata or the array is read, | |
581 | * then new information is added. | |
582 | * | |
583 | * The metadata must sometimes have a concept of a 'current' array | |
584 | * and a 'current' device. | |
585 | * The 'current' array is set by init_super to be the newly created array, | |
586 | * or is set by super_by_fd when it finds it is looking at an array inside | |
587 | * a container. | |
588 | * | |
589 | * The 'current' device is either the device that the metadata was read from | |
590 | * in case 1, or the last device added by add_to_super in case 3. | |
591 | * Case 2 does not identify a 'current' device. | |
592 | */ | |
f9ce90ba | 593 | extern struct superswitch { |
6adfd3af NB |
594 | |
595 | /* Used to report details of metadata read from a component | |
596 | * device. ->load_super has been called. | |
597 | */ | |
3da92f27 | 598 | void (*examine_super)(struct supertype *st, char *homehost); |
061f2c6a | 599 | void (*brief_examine_super)(struct supertype *st, int verbose); |
4737ae25 | 600 | void (*brief_examine_subarrays)(struct supertype *st, int verbose); |
0d726f17 | 601 | void (*export_examine_super)(struct supertype *st); |
6adfd3af NB |
602 | |
603 | /* Used to report details of an active array. | |
604 | * ->load_super was possibly given a 'component' string. | |
605 | */ | |
3da92f27 | 606 | void (*detail_super)(struct supertype *st, char *homehost); |
3da92f27 | 607 | void (*brief_detail_super)(struct supertype *st); |
0d726f17 | 608 | void (*export_detail_super)(struct supertype *st); |
6adfd3af | 609 | |
4cce4069 | 610 | /* Optional: platform hardware / firmware details */ |
5615172f | 611 | int (*detail_platform)(int verbose, int enumerate_only); |
4cce4069 | 612 | |
6adfd3af NB |
613 | /* Used: |
614 | * to get uuid to storing in bitmap metadata | |
615 | * and 'reshape' backup-data metadata | |
616 | * To see if a device is being re-added to an array it was part of. | |
617 | */ | |
3da92f27 | 618 | void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
6adfd3af | 619 | |
8592f29d | 620 | /* Extract generic details from metadata. This could be details about |
6adfd3af NB |
621 | * the container, or about an individual array within the container. |
622 | * The determination is made either by: | |
623 | * load_super being given a 'component' string. | |
624 | * validate_geometry determining what to create. | |
d2ca6449 NB |
625 | * The info includes both array information and device information. |
626 | * The particular device should be: | |
627 | * The last device added by add_to_super | |
628 | * The device the metadata was loaded from by load_super | |
a5d85af7 N |
629 | * If 'map' is present, then it is an array raid_disks long |
630 | * (raid_disk must already be set and correct) and it is filled | |
631 | * with 1 for slots that are thought to be active and 0 for slots which | |
632 | * appear to be failed/missing. | |
95eeceeb | 633 | * *info is zeroed out before data is added. |
6adfd3af | 634 | */ |
a5d85af7 | 635 | void (*getinfo_super)(struct supertype *st, struct mdinfo *info, char *map); |
5c4cd5da | 636 | struct mdinfo *(*getinfo_super_disks)(struct supertype *st); |
6adfd3af | 637 | /* Check if the given metadata is flagged as belonging to "this" |
9362c1c8 | 638 | * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost" |
6adfd3af | 639 | */ |
3da92f27 | 640 | int (*match_home)(struct supertype *st, char *homehost); |
6adfd3af NB |
641 | |
642 | /* Make one of several generic modifications to metadata | |
643 | * prior to assembly (or other times). | |
644 | * sparc2.2 - first bug in early 0.90 metadata | |
645 | * super-minor - change name of 0.90 metadata | |
646 | * summaries - 'correct' any redundant data | |
647 | * resync - mark array as dirty to trigger a resync. | |
648 | * uuid - set new uuid - only 0.90 or 1.x | |
649 | * name - change the name of the array (where supported) | |
650 | * homehost - change which host this array is tied to. | |
651 | * devicesize - If metadata is at start of device, change recorded | |
652 | * device size to match actual device size | |
653 | * byteorder - swap bytes for 0.90 metadata | |
654 | * | |
655 | * force-one - mark that device as uptodate, not old or failed. | |
656 | * force-array - mark array as clean if it would not otherwise | |
657 | * assemble | |
658 | * assemble - not sure how this is different from force-one... | |
659 | * linear-grow-new - add a new device to a linear array, but don't | |
660 | * change the size: so superblock still matches | |
661 | * linear-grow-update - now change the size of the array. | |
16715c01 DL |
662 | * writemostly - set the WriteMostly1 bit in the superblock devflags |
663 | * readwrite - clear the WriteMostly1 bit in the superblock devflags | |
6adfd3af | 664 | */ |
68c7d6d7 | 665 | int (*update_super)(struct supertype *st, struct mdinfo *info, |
3da92f27 | 666 | char *update, |
e5eac01f NB |
667 | char *devname, int verbose, |
668 | int uuid_set, char *homehost); | |
6adfd3af NB |
669 | |
670 | /* Create new metadata for new array as described. This could | |
671 | * be a new container, or an array in a pre-existing container. | |
672 | * Also used to zero metadata prior to writing it to invalidate old | |
673 | * metadata. | |
674 | */ | |
3da92f27 NB |
675 | int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
676 | unsigned long long size, char *name, | |
677 | char *homehost, int *uuid); | |
6adfd3af NB |
678 | |
679 | /* update the metadata to include new device, either at create or | |
680 | * when hot-adding a spare. | |
681 | */ | |
f20c3968 | 682 | int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
1a64be56 LM |
683 | int fd, char *devname); |
684 | /* update the metadata to delete a device, | |
685 | * when hot-removing. | |
686 | */ | |
687 | int (*remove_from_super)(struct supertype *st, mdu_disk_info_t *dinfo); | |
6adfd3af NB |
688 | |
689 | /* Write metadata to one device when fixing problems or adding | |
690 | * a new device. | |
691 | */ | |
3da92f27 | 692 | int (*store_super)(struct supertype *st, int fd); |
6adfd3af NB |
693 | |
694 | /* Write all metadata for this array. | |
695 | */ | |
111d01fc | 696 | int (*write_init_super)(struct supertype *st); |
64557c33 | 697 | int (*compare_super)(struct supertype *st, struct supertype *tst); |
3da92f27 | 698 | int (*load_super)(struct supertype *st, int fd, char *devname); |
2b959fbf | 699 | int (*load_container)(struct supertype *st, int fd, char *devname); |
82d9eba6 | 700 | struct supertype * (*match_metadata_desc)(char *arg); |
1bf4e2d9 | 701 | __u64 (*avail_size)(struct supertype *st, __u64 size); |
80e7f8c3 | 702 | unsigned long long (*min_acceptable_spare_size)(struct supertype *st); |
3da92f27 | 703 | int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
199171a2 | 704 | int delay, int write_behind, |
f9c25f1d | 705 | unsigned long long size, int may_change, int major); |
3da92f27 NB |
706 | void (*locate_bitmap)(struct supertype *st, int fd); |
707 | int (*write_bitmap)(struct supertype *st, int fd); | |
708 | void (*free_super)(struct supertype *st); | |
78e44928 NB |
709 | |
710 | /* validate_geometry is called with an st returned by | |
711 | * match_metadata_desc. | |
712 | * It should check that the geometry described in compatible with | |
713 | * the metadata type. It will be called repeatedly as devices | |
714 | * added to validate changing size and new devices. If there are | |
715 | * inter-device dependencies, it should record sufficient details | |
716 | * so these can be validated. | |
30f58b22 | 717 | * Both 'size' and '*freesize' are in sectors. chunk is KiB. |
ecbd9e81 N |
718 | * Return value is: |
719 | * 1: everything is OK | |
720 | * 0: not OK for some reason - if 'verbose', then error was reported. | |
721 | * -1: st->sb was NULL, 'subdev' is a member of a container of this | |
722 | * types, but array is not acceptable for some reason | |
723 | * message was reported even if verbose is 0. | |
78e44928 | 724 | */ |
17f25ca6 NB |
725 | int (*validate_geometry)(struct supertype *st, int level, int layout, |
726 | int raiddisks, | |
c21e737b | 727 | int *chunk, unsigned long long size, |
2c514b71 NB |
728 | char *subdev, unsigned long long *freesize, |
729 | int verbose); | |
598f0d58 | 730 | |
00bbdbda | 731 | struct mdinfo *(*container_content)(struct supertype *st, char *subarray); |
30f58b22 DW |
732 | /* query the supertype for default geometry */ |
733 | void (*default_geometry)(struct supertype *st, int *level, int *layout, int *chunk); /* optional */ | |
33414a01 DW |
734 | /* Permit subarray's to be deleted from inactive containers */ |
735 | int (*kill_subarray)(struct supertype *st); /* optional */ | |
aa534678 | 736 | /* Permit subarray's to be modified */ |
a951a4f7 | 737 | int (*update_subarray)(struct supertype *st, char *subarray, |
fa56eddb | 738 | char *update, struct mddev_ident *ident); /* optional */ |
7bc71196 DW |
739 | /* Check if reshape is supported for this external format. |
740 | * st is obtained from super_by_fd() where st->subarray[0] is | |
741 | * initialized to indicate if reshape is being performed at the | |
742 | * container or subarray level | |
743 | */ | |
744 | int (*reshape_super)(struct supertype *st, long long size, int level, | |
745 | int layout, int chunksize, int raid_disks, | |
41784c88 AK |
746 | int delta_disks, char *backup, char *dev, |
747 | int verbose); /* optional */ | |
999b4972 N |
748 | int (*manage_reshape)( /* optional */ |
749 | int afd, struct mdinfo *sra, struct reshape *reshape, | |
750 | struct supertype *st, unsigned long blocks, | |
751 | int *fds, unsigned long long *offsets, | |
752 | int dests, int *destfd, unsigned long long *destoffsets); | |
598f0d58 | 753 | |
549e9569 | 754 | /* for mdmon */ |
cba0191b NB |
755 | int (*open_new)(struct supertype *c, struct active_array *a, |
756 | char *inst); | |
ed9d66aa NB |
757 | |
758 | /* Tell the metadata handler the current state of the array. | |
759 | * This covers whether it is known to be consistent (no pending writes) | |
01f157d7 | 760 | * and how far along a resync is known to have progressed |
ed9d66aa NB |
761 | * (in a->resync_start). |
762 | * resync status is really irrelevant if the array is not consistent, | |
763 | * but some metadata (DDF!) have a place to record the distinction. | |
01f157d7 N |
764 | * If 'consistent' is '2', then the array can mark it dirty if a |
765 | * resync/recovery/whatever is required, or leave it clean if not. | |
766 | * Return value is 0 dirty (not consistent) and 1 if clean. | |
767 | * it is only really important if consistent is passed in as '2'. | |
4e5528c6 | 768 | */ |
01f157d7 | 769 | int (*set_array_state)(struct active_array *a, int consistent); |
7a7cc504 NB |
770 | |
771 | /* When the state of a device might have changed, we call set_disk to | |
772 | * tell the metadata what the current state is. | |
773 | * Typically this happens on spare->in_sync and (spare|in_sync)->faulty | |
774 | * transitions. | |
775 | * set_disk might be called when the state of the particular disk has | |
776 | * not in fact changed. | |
777 | */ | |
8d45d196 | 778 | void (*set_disk)(struct active_array *a, int n, int state); |
2e735d19 NB |
779 | void (*sync_metadata)(struct supertype *st); |
780 | void (*process_update)(struct supertype *st, | |
781 | struct metadata_update *update); | |
edd8d13c NB |
782 | void (*prepare_update)(struct supertype *st, |
783 | struct metadata_update *update); | |
549e9569 | 784 | |
6c3fb95c NB |
785 | /* activate_spare will check if the array is degraded and, if it |
786 | * is, try to find some spare space in the container. | |
787 | * On success, it add appropriate updates (For process_update) to | |
788 | * to the 'updates' list and returns a list of 'mdinfo' identifying | |
789 | * the device, or devices as there might be multiple missing | |
790 | * devices and multiple spares available. | |
791 | */ | |
792 | struct mdinfo *(*activate_spare)(struct active_array *a, | |
793 | struct metadata_update **updates); | |
2cda7640 ML |
794 | /* |
795 | * Return statically allocated string that represents metadata specific | |
796 | * controller domain of the disk. The domain is used in disk domain | |
797 | * matching functions. Disks belong to the same domain if the they have | |
798 | * the same domain from mdadm.conf and belong the same metadata domain. | |
799 | * Returning NULL or not providing this handler means that metadata | |
800 | * does not distinguish the differences between disks that belong to | |
801 | * different controllers. They are in the domain specified by | |
802 | * configuration file (mdadm.conf). | |
803 | * In case when the metadata has the notion of domains based on disk | |
804 | * it shall return NULL for disks that do not belong to the controller | |
805 | * the supported domains. Such disks will form another domain and won't | |
806 | * be mixed with supported ones. | |
807 | */ | |
808 | const char *(*get_disk_controller_domain)(const char *path); | |
549e9569 | 809 | |
ba53ea59 AK |
810 | /* for external backup area */ |
811 | int (*recover_backup)(struct supertype *st, struct mdinfo *info); | |
812 | ||
f277ce36 | 813 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
d03373f1 | 814 | int external; |
4cce4069 | 815 | const char *name; /* canonical metadata name */ |
0f22b998 | 816 | } *superlist[]; |
82d9eba6 | 817 | |
0f22b998 N |
818 | extern struct superswitch super0, super1; |
819 | extern struct superswitch super_imsm, super_ddf; | |
0592faeb | 820 | extern struct superswitch mbr, gpt; |
cdddbdbc | 821 | |
edd8d13c NB |
822 | struct metadata_update { |
823 | int len; | |
824 | char *buf; | |
825 | void *space; /* allocated space that monitor will use */ | |
cb23f1f4 N |
826 | void **space_list; /* list of allocated spaces that monitor can |
827 | * use or that it returned. | |
828 | */ | |
edd8d13c NB |
829 | struct metadata_update *next; |
830 | }; | |
831 | ||
6adfd3af NB |
832 | /* A supertype holds a particular collection of metadata. |
833 | * It identifies the metadata type by the superswitch, and the particular | |
834 | * sub-version of that metadata type. | |
835 | * metadata read in or created is stored in 'sb' and 'info'. | |
836 | * There are also fields used by mdmon to track containers. | |
837 | * | |
352452c3 N |
838 | * A supertype may refer to: |
839 | * Just an array, possibly in a container | |
840 | * A container, not identifying any particular array | |
841 | * Info read from just one device, not yet fully describing the array/container. | |
842 | * | |
843 | * | |
6adfd3af NB |
844 | * A supertype is created by: |
845 | * super_by_fd | |
846 | * guess_super | |
847 | * dup_super | |
848 | */ | |
82d9eba6 NB |
849 | struct supertype { |
850 | struct superswitch *ss; | |
851 | int minor_version; | |
ea329559 | 852 | int max_devs; |
2f6079dc | 853 | int container_dev; /* devnum of container */ |
64557c33 | 854 | void *sb; |
111d01fc | 855 | void *info; |
df3346e6 LM |
856 | int ignore_hw_compat; /* used to inform metadata handlers that it should ignore |
857 | HW/firmware related incompatability to load metadata. | |
858 | Used when examining metadata to display content of disk | |
859 | when user has no hw/firmare compatible system. | |
860 | */ | |
edd8d13c NB |
861 | struct metadata_update *updates; |
862 | struct metadata_update **update_tail; | |
863 | ||
549e9569 NB |
864 | /* extra stuff used by mdmon */ |
865 | struct active_array *arrays; | |
549e9569 | 866 | int sock; /* listen to external programs */ |
549e9569 NB |
867 | int devnum; |
868 | char *devname; /* e.g. md0. This appears in metadata_verison: | |
869 | * external:/md0/12 | |
870 | */ | |
871 | int devcnt; | |
872 | ||
873 | struct mdinfo *devs; | |
874 | ||
82d9eba6 | 875 | }; |
f9ce90ba | 876 | |
4725bc31 | 877 | extern struct supertype *super_by_fd(int fd, char **subarray); |
54887ad8 N |
878 | enum guess_types { guess_any, guess_array, guess_partitions }; |
879 | extern struct supertype *guess_super_type(int fd, enum guess_types guess_type); | |
880 | static inline struct supertype *guess_super(int fd) { | |
881 | return guess_super_type(fd, guess_any); | |
882 | } | |
3da92f27 | 883 | extern struct supertype *dup_super(struct supertype *st); |
beae1dfe | 884 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
3a371610 | 885 | extern int must_be_container(int fd); |
0f0749ad | 886 | extern int dev_size_from_id(dev_t id, unsigned long long *size); |
8382f19b NB |
887 | extern void get_one_disk(int mdfd, mdu_array_info_t *ainf, |
888 | mdu_disk_info_t *disk); | |
a7c6e3fb | 889 | void wait_for(char *dev, int fd); |
f9ce90ba | 890 | |
5527fc74 N |
891 | /* |
892 | * Data structures for policy management. | |
893 | * Each device can have a policy structure that lists | |
894 | * various name/value pairs each possibly with a metadata associated. | |
895 | * The policy list is sorted by name/value/metadata | |
896 | */ | |
897 | struct dev_policy { | |
898 | struct dev_policy *next; | |
899 | char *name; /* None of these strings are allocated. They are | |
900 | * all just references to strings which are known | |
901 | * to exist elsewhere. | |
902 | * name and metadata can be compared by address equality. | |
903 | */ | |
904 | const char *metadata; | |
2cda7640 | 905 | const char *value; |
5527fc74 N |
906 | }; |
907 | ||
4e8d9f0a | 908 | extern char pol_act[], pol_domain[], pol_metadata[], pol_auto[]; |
5527fc74 N |
909 | |
910 | /* iterate over the sublist starting at list, having the same | |
911 | * 'name' as 'list', and matching the given metadata (Where | |
912 | * NULL matches anything | |
913 | */ | |
914 | #define pol_for_each(item, list, _metadata) \ | |
915 | for (item = list; \ | |
916 | item && item->name == list->name; \ | |
917 | item = item->next) \ | |
918 | if (!(!_metadata || !item->metadata || _metadata == item->metadata)) \ | |
919 | ; else | |
920 | ||
921 | /* | |
922 | * policy records read from mdadm are largely just name-value pairs. | |
923 | * The names are constants, not strdupped | |
924 | */ | |
925 | struct pol_rule { | |
926 | struct pol_rule *next; | |
927 | char *type; /* rule_policy or rule_part */ | |
928 | struct rule { | |
929 | struct rule *next; | |
930 | char *name; | |
931 | char *value; | |
932 | char *dups; /* duplicates of 'value' with a partNN appended */ | |
933 | } *rule; | |
934 | }; | |
935 | ||
936 | extern char rule_policy[], rule_part[]; | |
937 | extern char rule_path[], rule_type[]; | |
938 | extern char type_part[], type_disk[]; | |
939 | ||
940 | extern void policyline(char *line, char *type); | |
4e8d9f0a | 941 | extern void policy_add(char *type, ...); |
5527fc74 N |
942 | extern void policy_free(void); |
943 | ||
73c9c47c | 944 | extern struct dev_policy *path_policy(char *path, char *type); |
5527fc74 | 945 | extern struct dev_policy *disk_policy(struct mdinfo *disk); |
4e8d9f0a | 946 | extern struct dev_policy *devnum_policy(int dev); |
5527fc74 N |
947 | extern void dev_policy_free(struct dev_policy *p); |
948 | ||
e78dda3b N |
949 | //extern void pol_new(struct dev_policy **pol, char *name, char *val, char *metadata); |
950 | extern void pol_add(struct dev_policy **pol, char *name, char *val, char *metadata); | |
5527fc74 N |
951 | extern struct dev_policy *pol_find(struct dev_policy *pol, char *name); |
952 | ||
e3bb5f14 N |
953 | enum policy_action { |
954 | act_default, | |
955 | act_include, | |
956 | act_re_add, | |
d2db3045 N |
957 | act_spare, /* This only applies to bare devices */ |
958 | act_spare_same_slot, /* this allows non-bare devices, | |
959 | * but only if recent removal */ | |
960 | act_force_spare, /* this allow non-bare devices in any case */ | |
e3bb5f14 N |
961 | act_err |
962 | }; | |
963 | ||
964 | extern int policy_action_allows(struct dev_policy *plist, const char *metadata, | |
965 | enum policy_action want); | |
966 | extern int disk_action_allows(struct mdinfo *disk, const char *metadata, | |
967 | enum policy_action want); | |
f5f12c84 N |
968 | |
969 | struct domainlist { | |
970 | struct domainlist *next; | |
2cda7640 | 971 | const char *dom; |
f5f12c84 N |
972 | }; |
973 | ||
974 | extern int domain_test(struct domainlist *dom, struct dev_policy *pol, | |
975 | const char *metadata); | |
976 | extern struct domainlist *domain_from_array(struct mdinfo *mdi, | |
977 | const char *metadata); | |
e78dda3b N |
978 | extern void domainlist_add_dev(struct domainlist **dom, int devnum, |
979 | const char *metadata); | |
f5f12c84 N |
980 | extern void domain_free(struct domainlist *dl); |
981 | extern void domain_merge(struct domainlist **domp, struct dev_policy *pol, | |
982 | const char *metadata); | |
e78dda3b | 983 | void domain_add(struct domainlist **domp, char *domain); |
f5f12c84 | 984 | |
403410eb PC |
985 | extern void policy_save_path(char *id_path, struct map_ent *array); |
986 | extern int policy_check_path(struct mdinfo *disk, struct map_ent *array); | |
987 | ||
838acbc2 NB |
988 | #if __GNUC__ < 3 |
989 | struct stat64; | |
990 | #endif | |
991 | ||
45e878bb NB |
992 | #define HAVE_NFTW we assume |
993 | #define HAVE_FTW | |
994 | ||
2df1f269 | 995 | #ifdef __UCLIBC__ |
45e878bb | 996 | # include <features.h> |
2df1f269 BRF |
997 | # ifndef __UCLIBC_HAS_LFS__ |
998 | # define lseek64 lseek | |
999 | # endif | |
45e878bb NB |
1000 | # ifndef __UCLIBC_HAS_FTW__ |
1001 | # undef HAVE_FTW | |
1002 | # undef HAVE_NFTW | |
1003 | # endif | |
1004 | #endif | |
1005 | ||
1006 | #ifdef __dietlibc__ | |
1007 | # undef HAVE_NFTW | |
1008 | #endif | |
1009 | ||
e39b673e | 1010 | #if defined(__KLIBC__) |
1011 | # undef HAVE_NFTW | |
1012 | # undef HAVE_FTW | |
1013 | #endif | |
1014 | ||
45e878bb | 1015 | #ifndef HAVE_NFTW |
173fc515 | 1016 | # define FTW_PHYS 1 |
45e878bb NB |
1017 | # ifndef HAVE_FTW |
1018 | struct FTW {}; | |
173fc515 NB |
1019 | # endif |
1020 | #endif | |
1021 | ||
45e878bb NB |
1022 | #ifdef HAVE_FTW |
1023 | # include <ftw.h> | |
1024 | #endif | |
1025 | ||
173fc515 NB |
1026 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); |
1027 | ||
f9ce90ba | 1028 | |
64c4757e | 1029 | extern int Manage_ro(char *devname, int fd, int readonly); |
91f068bf | 1030 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); |
dd0781e5 | 1031 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); |
64c4757e | 1032 | extern int Manage_subdevs(char *devname, int fd, |
833bb0f8 | 1033 | struct mddev_dev *devlist, int verbose, int test, |
11b391ec | 1034 | char *update, int force); |
1f48664b | 1035 | extern int autodetect(void); |
e5329c37 | 1036 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
8fac0577 | 1037 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force); |
06b0d786 | 1038 | extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file, |
e86c9dd6 | 1039 | long long size, |
691a36b7 | 1040 | int level, char *layout_str, int chunksize, int raid_disks, |
e2e53a2d | 1041 | struct mddev_dev *devlist, |
ce52f92f | 1042 | int assume_clean, int force); |
06b0d786 | 1043 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
ea0ebe96 | 1044 | int *fdlist, int cnt, char *backup_file, int verbose); |
e9e43ec3 | 1045 | extern int Grow_continue(int mdfd, struct supertype *st, |
b76b30e0 AK |
1046 | struct mdinfo *info, char *backup_file, |
1047 | int freeze_reshape); | |
1048 | ||
3f54bd62 AK |
1049 | extern int restore_backup(struct supertype *st, |
1050 | struct mdinfo *content, | |
1051 | int working_disks, | |
1052 | int spares, | |
1053 | char *backup_file, | |
1054 | int verbose); | |
2dddadb0 AK |
1055 | extern int Grow_continue_command(char *devname, int fd, |
1056 | char *backup_file, int verbose); | |
64c4757e | 1057 | |
7f91af49 | 1058 | extern int Assemble(struct supertype *st, char *mddev, |
fa56eddb | 1059 | struct mddev_ident *ident, |
87f26d14 N |
1060 | struct mddev_dev *devlist, |
1061 | char *backup_file, int invalid_backup, | |
64c4757e | 1062 | int readonly, int runstop, |
0ac91628 | 1063 | char *update, char *homehost, int require_homehost, |
b76b30e0 | 1064 | int verbose, int force, int freeze_reshape); |
64c4757e | 1065 | |
7f91af49 | 1066 | extern int Build(char *mddev, int chunk, int level, int layout, |
a655e550 | 1067 | int raiddisks, struct mddev_dev *devlist, int assume_clean, |
7f91af49 | 1068 | char *bitmap_file, int bitmap_chunk, int write_behind, |
83208785 | 1069 | int delay, int verbose, int autof, unsigned long long size); |
64c4757e NB |
1070 | |
1071 | ||
7f91af49 | 1072 | extern int Create(struct supertype *st, char *mddev, |
5dd497ee | 1073 | int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, |
3d3dd91e | 1074 | char *name, char *homehost, int *uuid, |
a655e550 | 1075 | int subdevs, struct mddev_dev *devlist, |
47d79ef8 | 1076 | int runstop, int verbose, int force, int assume_clean, |
7f91af49 | 1077 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int autof); |
64c4757e | 1078 | |
54bad364 | 1079 | extern int Detail(char *dev, int brief, int export, int test, char *homehost); |
4cce4069 | 1080 | extern int Detail_Platform(struct superswitch *ss, int scan, int verbose); |
e0d19036 | 1081 | extern int Query(char *dev); |
a655e550 | 1082 | extern int Examine(struct mddev_dev *devlist, int brief, int export, int scan, |
0d726f17 | 1083 | int SparcAdjust, struct supertype *forcest, char *homehost); |
a655e550 | 1084 | extern int Monitor(struct mddev_dev *devlist, |
e0d19036 | 1085 | char *mailaddr, char *alert_cmd, |
aa88f531 | 1086 | int period, int daemonise, int scan, int oneshot, |
edde9560 AC |
1087 | int dosyslog, int test, char *pidfile, int increments, |
1088 | int share); | |
64c4757e | 1089 | |
9277cc77 | 1090 | extern int Kill(char *dev, struct supertype *st, int force, int quiet, int noexcl); |
33414a01 | 1091 | extern int Kill_subarray(char *dev, char *subarray, int quiet); |
fa56eddb | 1092 | extern int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident *ident, int quiet); |
b90c0e9a | 1093 | extern int Wait(char *dev); |
9f1da824 | 1094 | extern int WaitClean(char *dev, int sock, int verbose); |
9a9dab36 | 1095 | |
8382f19b | 1096 | extern int Incremental(char *devname, int verbose, int runstop, |
0ac91628 | 1097 | struct supertype *st, char *homehost, int require_homehost, |
b76b30e0 | 1098 | int autof, int freeze_reshape); |
8382f19b NB |
1099 | extern void RebuildMap(void); |
1100 | extern int IncrementalScan(int verbose); | |
950bc344 | 1101 | extern int IncrementalRemove(char *devname, char *path, int verbose); |
c82f047c NB |
1102 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
1103 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 1104 | unsigned long write_behind, |
dcec9ee5 NB |
1105 | unsigned long long array_size, |
1106 | int major); | |
55935d51 | 1107 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
20b60dcd | 1108 | extern int Write_rules(char *rule_name); |
bf4fb153 | 1109 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
2a528478 | 1110 | extern unsigned long bitmap_sectors(struct bitmap_super_s *bsb); |
c82f047c | 1111 | |
64c4757e | 1112 | extern int md_get_version(int fd); |
e0d19036 | 1113 | extern int get_linux_version(void); |
bc77ed53 | 1114 | extern int mdadm_version(char *version); |
84e11361 | 1115 | extern long long parse_size(char *size); |
64c4757e | 1116 | extern int parse_uuid(char *str, int uuid[4]); |
4a06e2c2 N |
1117 | extern int parse_layout_10(char *layout); |
1118 | extern int parse_layout_faulty(char *layout); | |
682c7051 NB |
1119 | extern int check_ext2(int fd, char *name); |
1120 | extern int check_reiser(int fd, char *name); | |
1121 | extern int check_raid(int fd, char *name); | |
53ed6ac3 KW |
1122 | extern int check_partitions(int fd, char *dname, |
1123 | unsigned long long freesize, | |
1124 | unsigned long long size); | |
64c4757e | 1125 | |
dd0781e5 | 1126 | extern int get_mdp_major(void); |
8b0dabea | 1127 | extern int dev_open(char *dev, int flags); |
e8a70c89 | 1128 | extern int open_dev(int devnum); |
d998b738 | 1129 | extern int open_dev_flags(int devnum, int flags); |
a931db9e | 1130 | extern int open_dev_excl(int devnum); |
8d80900b | 1131 | extern int is_standard(char *dev, int *nump); |
9008ed1c | 1132 | extern int same_dev(char *one, char *two); |
dd0781e5 | 1133 | |
f1ae21c4 | 1134 | extern int parse_auto(char *str, char *msg, int config); |
fa56eddb | 1135 | extern struct mddev_ident *conf_get_ident(char *dev); |
a655e550 | 1136 | extern struct mddev_dev *conf_get_devs(void); |
8382f19b | 1137 | extern int conf_test_dev(char *devname); |
4e8d9f0a | 1138 | extern int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost); |
8aec876d NB |
1139 | extern struct createinfo *conf_get_create_info(void); |
1140 | extern void set_conffile(char *file); | |
1141 | extern char *conf_get_mailaddr(void); | |
1142 | extern char *conf_get_mailfrom(void); | |
1143 | extern char *conf_get_program(void); | |
0ac91628 | 1144 | extern char *conf_get_homehost(int *require_homehostp); |
e0d19036 | 1145 | extern char *conf_line(FILE *file); |
98c6faba | 1146 | extern char *conf_word(FILE *file, int allow_key); |
0ac91628 N |
1147 | extern int conf_name_is_free(char *name); |
1148 | extern int devname_matches(char *name, char *match); | |
2244d1a9 N |
1149 | extern struct mddev_ident *conf_match(struct supertype *st, |
1150 | struct mdinfo *info, | |
1151 | char *devname, | |
1152 | int verbose, int *rvp); | |
6d11ec6f | 1153 | extern int experimental(void); |
0ac91628 | 1154 | |
e0d19036 NB |
1155 | extern void free_line(char *line); |
1156 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 1157 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
22e263f6 | 1158 | extern const int uuid_zero[4]; |
f277ce36 | 1159 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
350f29f9 | 1160 | extern void copy_uuid(void *a, int b[4], int swapuuid); |
aae5a112 | 1161 | extern char *__fname_from_uuid(int id[4], int swap, char *buf, char sep); |
d7288ddc | 1162 | extern char *fname_from_uuid(struct supertype *st, |
ff54de6e | 1163 | struct mdinfo *info, char *buf, char sep); |
4b1ac34b | 1164 | extern unsigned long calc_csum(void *super, int bytes); |
583315d9 | 1165 | extern int enough(int level, int raid_disks, int layout, int clean, |
265e0f17 | 1166 | char *avail, int avail_disks); |
8453e704 | 1167 | extern int enough_fd(int fd); |
e0d19036 | 1168 | extern int ask(char *mesg); |
8fac0577 | 1169 | extern unsigned long long get_component_size(int fd); |
0430ed48 | 1170 | extern void remove_partitions(int fd); |
691c6ee1 | 1171 | extern int test_partition(int fd); |
bfd76b93 | 1172 | extern int test_partition_from_id(dev_t id); |
577e8448 | 1173 | extern int get_data_disks(int level, int layout, int raid_disks); |
5f8097be NB |
1174 | extern unsigned long long calc_array_size(int level, int raid_disks, int layout, |
1175 | int chunksize, unsigned long long devsize); | |
edd8d13c NB |
1176 | extern int flush_metadata_updates(struct supertype *st); |
1177 | extern void append_metadata_update(struct supertype *st, void *buf, int len); | |
6234c63c DW |
1178 | extern int assemble_container_content(struct supertype *st, int mdfd, |
1179 | struct mdinfo *content, int runstop, | |
49680258 | 1180 | char *chosen_name, int verbose, |
b76b30e0 | 1181 | char *backup_file, int freeze_reshape); |
326727d9 AC |
1182 | extern struct mdinfo *container_choose_spares(struct supertype *st, |
1183 | unsigned long long min_size, | |
1184 | struct domainlist *domlist, | |
1185 | char *spare_group, | |
1186 | const char *metadata, int get_one); | |
d52bb542 | 1187 | extern int move_spare(char *from_devname, char *to_devname, dev_t devid); |
7801ac20 N |
1188 | extern int add_disk(int mdfd, struct supertype *st, |
1189 | struct mdinfo *sra, struct mdinfo *info); | |
de6ae750 N |
1190 | extern int remove_disk(int mdfd, struct supertype *st, |
1191 | struct mdinfo *sra, struct mdinfo *info); | |
f35f2525 | 1192 | extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info); |
1e5c6983 | 1193 | unsigned long long min_recovery_start(struct mdinfo *array); |
cd29a5c8 | 1194 | |
56eb10c0 | 1195 | extern char *human_size(long long bytes); |
e4965ef8 N |
1196 | extern char *human_size_brief(long long bytes); |
1197 | extern void print_r10_layout(int layout); | |
e0d19036 | 1198 | |
63152c1b NB |
1199 | #define NoMdDev (1<<23) |
1200 | extern int find_free_devnum(int use_partitions); | |
1201 | ||
e0d19036 NB |
1202 | extern void put_md_name(char *name); |
1203 | extern char *get_md_name(int dev); | |
1204 | ||
c913b90e | 1205 | extern char DefaultConfFile[]; |
b5e64645 | 1206 | |
69207ff6 N |
1207 | extern int create_mddev(char *dev, char *name, int autof, int trustworthy, |
1208 | char *chosen); | |
1209 | /* values for 'trustworthy' */ | |
1210 | #define LOCAL 1 | |
d1d3482b | 1211 | #define LOCAL_ANY 10 |
69207ff6 N |
1212 | #define FOREIGN 2 |
1213 | #define METADATA 3 | |
6be1d39d | 1214 | extern int open_mddev(char *dev, int report_errors); |
a322f70c | 1215 | extern int open_container(int fd); |
33414a01 DW |
1216 | extern int is_container_member(struct mdstat_ent *ent, char *devname); |
1217 | extern int is_subarray_active(char *subarray, char *devname); | |
feab51f8 | 1218 | extern int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet); |
33414a01 | 1219 | extern struct superswitch *version_to_superswitch(char *vers); |
b5e64645 | 1220 | |
a931db9e | 1221 | extern int mdmon_running(int devnum); |
24f6f99b | 1222 | extern int mdmon_pid(int devnum); |
40ebbb9c | 1223 | extern int check_env(char *name); |
148acb7b | 1224 | extern __u32 random32(void); |
8850ee3e | 1225 | extern int start_mdmon(int devnum); |
a931db9e | 1226 | |
999b4972 N |
1227 | extern int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, |
1228 | struct supertype *st, unsigned long stripes, | |
1229 | int *fds, unsigned long long *offsets, | |
1230 | int dests, int *destfd, unsigned long long *destoffsets); | |
10f22854 | 1231 | void abort_reshape(struct mdinfo *sra); |
999b4972 | 1232 | |
2f6079dc | 1233 | extern char *devnum2devname(int num); |
11877f4d | 1234 | extern void fmt_devname(char *name, int num); |
77472ff8 | 1235 | extern int devname2devnum(char *name); |
c94709e8 | 1236 | extern int stat2devnum(struct stat *st); |
2f6079dc | 1237 | extern int fd2devnum(int fd); |
b5e64645 | 1238 | |
a931db9e NB |
1239 | static inline int dev2major(int d) |
1240 | { | |
1241 | if (d >= 0) | |
1242 | return MD_MAJOR; | |
1243 | else | |
1244 | return get_mdp_major(); | |
1245 | } | |
1246 | ||
1247 | static inline int dev2minor(int d) | |
1248 | { | |
1249 | if (d >= 0) | |
1250 | return d; | |
1251 | return (-1-d) << MdpMinorShift; | |
1252 | } | |
1253 | ||
6416d527 NB |
1254 | static inline int ROUND_UP(int a, int base) |
1255 | { | |
1256 | return ((a+base-1)/base)*base; | |
1257 | } | |
1258 | ||
3c558363 N |
1259 | static inline int is_subarray(char *vers) |
1260 | { | |
e9dd1598 N |
1261 | /* The version string for a 'subarray' (an array in a container) |
1262 | * is | |
1263 | * /containername/componentname for normal read-write arrays | |
746a6567 N |
1264 | * -containername/componentname for arrays which mdmon must not |
1265 | * reconfigure. They might be read-only | |
1266 | * or might be undergoing reshape etc. | |
e9dd1598 N |
1267 | * containername is e.g. md0, md_d1 |
1268 | * componentname is dependant on the metadata. e.g. '1' 'S1' ... | |
1269 | */ | |
1270 | return (*vers == '/' || *vers == '-'); | |
3c558363 N |
1271 | } |
1272 | ||
e5408a32 DW |
1273 | static inline char *to_subarray(struct mdstat_ent *ent, char *container) |
1274 | { | |
1275 | return &ent->metadata_version[10+strlen(container)+1]; | |
1276 | } | |
1277 | ||
2a24d7b6 DW |
1278 | #ifdef DEBUG |
1279 | #define dprintf(fmt, arg...) \ | |
1280 | fprintf(stderr, fmt, ##arg) | |
1281 | #else | |
1282 | #define dprintf(fmt, arg...) \ | |
1283 | ({ if (0) fprintf(stderr, fmt, ##arg); 0; }) | |
1284 | #endif | |
1a0ee0ba DK |
1285 | #include <assert.h> |
1286 | #include <stdarg.h> | |
1287 | static inline int xasprintf(char **strp, const char *fmt, ...) { | |
1288 | va_list ap; | |
1289 | int ret; | |
1290 | va_start(ap, fmt); | |
089485cb | 1291 | ret = vasprintf(strp, fmt, ap); |
1a0ee0ba DK |
1292 | va_end(ap); |
1293 | assert(ret >= 0); | |
1294 | return ret; | |
1295 | } | |
2a24d7b6 | 1296 | |
b5e64645 NB |
1297 | #define LEVEL_MULTIPATH (-4) |
1298 | #define LEVEL_LINEAR (-1) | |
1299 | #define LEVEL_FAULTY (-5) | |
1300 | ||
17f25ca6 NB |
1301 | /* kernel module doesn't know about these */ |
1302 | #define LEVEL_CONTAINER (-100) | |
a322f70c | 1303 | #define LEVEL_UNSUPPORTED (-200) |
17f25ca6 | 1304 | |
b5e64645 NB |
1305 | |
1306 | /* faulty stuff */ | |
1307 | ||
1308 | #define WriteTransient 0 | |
1309 | #define ReadTransient 1 | |
1310 | #define WritePersistent 2 | |
1311 | #define ReadPersistent 3 | |
1312 | #define WriteAll 4 /* doesn't go to device */ | |
1313 | #define ReadFixable 5 | |
1314 | #define Modes 6 | |
1315 | ||
1316 | #define ClearErrors 31 | |
1317 | #define ClearFaults 30 | |
1318 | ||
1319 | #define AllPersist 100 /* internal use only */ | |
1320 | #define NoPersist 101 | |
1321 | ||
1322 | #define ModeMask 0x1f | |
1323 | #define ModeShift 5 | |
fe6729fa NB |
1324 | |
1325 | ||
1326 | #ifdef __TINYC__ | |
1327 | #undef minor | |
1328 | #undef major | |
1329 | #undef makedev | |
1330 | #define minor(x) ((x)&0xff) | |
1331 | #define major(x) (((x)>>8)&0xff) | |
1332 | #define makedev(M,m) (((M)<<8) | (m)) | |
1333 | #endif | |
1334 | ||
b640a252 | 1335 | /* for raid4/5/6 */ |
e86c9dd6 NB |
1336 | #define ALGORITHM_LEFT_ASYMMETRIC 0 |
1337 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
1338 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
1339 | #define ALGORITHM_RIGHT_SYMMETRIC 3 | |
b640a252 N |
1340 | |
1341 | /* Define non-rotating (raid4) algorithms. These allow | |
1342 | * conversion of raid4 to raid5. | |
1343 | */ | |
1344 | #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */ | |
1345 | #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */ | |
1346 | ||
1347 | /* DDF RAID6 layouts differ from md/raid6 layouts in two ways. | |
1348 | * Firstly, the exact positioning of the parity block is slightly | |
1349 | * different between the 'LEFT_*' modes of md and the "_N_*" modes | |
1350 | * of DDF. | |
1351 | * Secondly, or order of datablocks over which the Q syndrome is computed | |
1352 | * is different. | |
1353 | * Consequently we have different layouts for DDF/raid6 than md/raid6. | |
1354 | * These layouts are from the DDFv1.2 spec. | |
1355 | * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but | |
1356 | * leaves RLQ=3 as 'Vendor Specific' | |
1357 | */ | |
1358 | ||
1359 | #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */ | |
1360 | #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */ | |
1361 | #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */ | |
1362 | ||
1363 | ||
1364 | /* For every RAID5 algorithm we define a RAID6 algorithm | |
1365 | * with exactly the same layout for data and parity, and | |
1366 | * with the Q block always on the last device (N-1). | |
1367 | * This allows trivial conversion from RAID5 to RAID6 | |
1368 | */ | |
1369 | #define ALGORITHM_LEFT_ASYMMETRIC_6 16 | |
1370 | #define ALGORITHM_RIGHT_ASYMMETRIC_6 17 | |
1371 | #define ALGORITHM_LEFT_SYMMETRIC_6 18 | |
1372 | #define ALGORITHM_RIGHT_SYMMETRIC_6 19 | |
1373 | #define ALGORITHM_PARITY_0_6 20 | |
1374 | #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N | |
1375 | ||
33a6535d AW |
1376 | /* Define PATH_MAX in case we don't use glibc or standard library does |
1377 | * not have PATH_MAX defined. Assume max path length is 4K characters. | |
1378 | */ | |
1379 | #ifndef PATH_MAX | |
1380 | #define PATH_MAX 4096 | |
1381 | #endif | |
1382 | ||
2d3603ba KW |
1383 | #define PROCESS_DELAYED -2 |
1384 | #define PROCESS_PENDING -3 |