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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
e736b623 | 4 | * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de> |
64c4757e NB |
5 | * |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
e736b623 | 22 | * Email: <neilb@suse.de> |
64c4757e NB |
23 | */ |
24 | ||
4ccdb956 | 25 | #define _GNU_SOURCE |
c2c9bb6f | 26 | #define _FILE_OFFSET_BITS 64 |
64c4757e | 27 | #include <unistd.h> |
e39b673e | 28 | #if !defined(__dietlibc__) && !defined(__KLIBC__) |
64c4757e | 29 | extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence)); |
f783ca4f | 30 | #else |
fffdbe5e | 31 | # if defined(__NO_STAT64) || __WORDSIZE != 32 |
f783ca4f NB |
32 | # define lseek64 lseek |
33 | # endif | |
98c6faba | 34 | #endif |
64c4757e NB |
35 | |
36 | #include <sys/types.h> | |
37 | #include <sys/stat.h> | |
38 | #include <stdlib.h> | |
39 | #include <time.h> | |
11018a45 | 40 | #include <sys/time.h> |
64c4757e NB |
41 | #include <getopt.h> |
42 | #include <fcntl.h> | |
43 | #include <stdio.h> | |
44 | #include <errno.h> | |
45 | #include <string.h> | |
773135f5 | 46 | #include <syslog.h> |
b56c3630 NB |
47 | #ifdef __dietlibc__ |
48 | #include <strings.h> | |
280a927d NB |
49 | /* dietlibc has deprecated random and srandom!! */ |
50 | #define random rand | |
51 | #define srandom srand | |
98c6faba NB |
52 | #endif |
53 | ||
64c4757e NB |
54 | |
55 | #include <linux/kdev_t.h> | |
e0d19036 NB |
56 | /*#include <linux/fs.h> */ |
57 | #include <sys/mount.h> | |
58 | #include <asm/types.h> | |
64c4757e NB |
59 | #include <sys/ioctl.h> |
60 | #define MD_MAJOR 9 | |
dd0781e5 | 61 | #define MdpMinorShift 6 |
64c4757e | 62 | |
e0d19036 | 63 | #ifndef BLKGETSIZE64 |
98c6faba | 64 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ |
e0d19036 | 65 | #endif |
56eb10c0 | 66 | |
c82f047c NB |
67 | #define DEFAULT_BITMAP_CHUNK 4096 |
68 | #define DEFAULT_BITMAP_DELAY 5 | |
dfd4d8ee | 69 | #define DEFAULT_MAX_WRITE_BEHIND 256 |
64c4757e NB |
70 | |
71 | #include "md_u.h" | |
e0d19036 | 72 | #include "md_p.h" |
c82f047c | 73 | #include "bitmap.h" |
f7dd881f | 74 | #include "msg.h" |
64c4757e | 75 | |
1e0d770c | 76 | #include <endian.h> |
efd441d1 NB |
77 | /* Redhat don't like to #include <asm/byteorder.h>, and |
78 | * some time include <linux/byteorder/xxx_endian.h> isn't enough, | |
79 | * and there is no standard conversion function so... */ | |
0ae03b8a NB |
80 | /* And dietlibc doesn't think byteswap is ok, so.. */ |
81 | /* #include <byteswap.h> */ | |
82 | #define bswap_16(x) (((x) & 0x00ffU) << 8 | \ | |
83 | ((x) & 0xff00U) >> 8) | |
84 | #define bswap_32(x) (((x) & 0x000000ffU) << 24 | \ | |
85 | ((x) & 0xff000000U) >> 24 | \ | |
86 | ((x) & 0x0000ff00U) << 8 | \ | |
87 | ((x) & 0x00ff0000U) >> 8) | |
88 | #define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \ | |
89 | ((x) & 0xff00000000000000ULL) >> 56 | \ | |
90 | ((x) & 0x000000000000ff00ULL) << 40 | \ | |
91 | ((x) & 0x00ff000000000000ULL) >> 40 | \ | |
92 | ((x) & 0x0000000000ff0000ULL) << 24 | \ | |
93 | ((x) & 0x0000ff0000000000ULL) >> 24 | \ | |
94 | ((x) & 0x00000000ff000000ULL) << 8 | \ | |
95 | ((x) & 0x000000ff00000000ULL) >> 8) | |
96 | ||
e39b673e | 97 | #if !defined(__KLIBC__) |
efd441d1 NB |
98 | #if BYTE_ORDER == LITTLE_ENDIAN |
99 | #define __cpu_to_le16(_x) (_x) | |
100 | #define __cpu_to_le32(_x) (_x) | |
101 | #define __cpu_to_le64(_x) (_x) | |
102 | #define __le16_to_cpu(_x) (_x) | |
103 | #define __le32_to_cpu(_x) (_x) | |
104 | #define __le64_to_cpu(_x) (_x) | |
974e620d NB |
105 | |
106 | #define __cpu_to_be16(_x) bswap_16(_x) | |
107 | #define __cpu_to_be32(_x) bswap_32(_x) | |
108 | #define __cpu_to_be64(_x) bswap_64(_x) | |
109 | #define __be16_to_cpu(_x) bswap_16(_x) | |
110 | #define __be32_to_cpu(_x) bswap_32(_x) | |
111 | #define __be64_to_cpu(_x) bswap_64(_x) | |
efd441d1 NB |
112 | #elif BYTE_ORDER == BIG_ENDIAN |
113 | #define __cpu_to_le16(_x) bswap_16(_x) | |
114 | #define __cpu_to_le32(_x) bswap_32(_x) | |
115 | #define __cpu_to_le64(_x) bswap_64(_x) | |
116 | #define __le16_to_cpu(_x) bswap_16(_x) | |
117 | #define __le32_to_cpu(_x) bswap_32(_x) | |
118 | #define __le64_to_cpu(_x) bswap_64(_x) | |
974e620d NB |
119 | |
120 | #define __cpu_to_be16(_x) (_x) | |
121 | #define __cpu_to_be32(_x) (_x) | |
122 | #define __cpu_to_be64(_x) (_x) | |
123 | #define __be16_to_cpu(_x) (_x) | |
124 | #define __be32_to_cpu(_x) (_x) | |
125 | #define __be64_to_cpu(_x) (_x) | |
1e0d770c NB |
126 | #else |
127 | # error "unknown endianness." | |
128 | #endif | |
e39b673e | 129 | #endif /* __KLIBC__ */ |
1e0d770c NB |
130 | |
131 | ||
132 | ||
4b1ac34b NB |
133 | /* general information that might be extracted from a superblock */ |
134 | struct mdinfo { | |
135 | mdu_array_info_t array; | |
136 | mdu_disk_info_t disk; | |
137 | __u64 events; | |
fbf8a0b7 | 138 | int uuid[4]; |
31317663 | 139 | char name[33]; |
353632d9 | 140 | unsigned long long data_offset; |
598f0d58 NB |
141 | unsigned long long component_size; /* same as array.size, except in |
142 | * sectors and up to 64bits. | |
143 | */ | |
da9b4a62 DW |
144 | unsigned long long custom_array_size; /* size for non-default sized |
145 | * arrays (in sectors) | |
146 | */ | |
353632d9 NB |
147 | int reshape_active; |
148 | unsigned long long reshape_progress; | |
e1516be1 DW |
149 | union { |
150 | unsigned long long resync_start; /* per-array resync position */ | |
151 | unsigned long long recovery_start; /* per-device rebuild position */ | |
b7528a20 | 152 | #define MaxSector (~0ULL) /* resync/recovery complete position */ |
e1516be1 | 153 | }; |
a67dd8cc | 154 | unsigned long safe_mode_delay; /* ms delay to mark clean */ |
353632d9 | 155 | int new_level, delta_disks, new_layout, new_chunk; |
06c7f68e | 156 | int errors; |
7e0f6979 NB |
157 | int cache_size; /* size of raid456 stripe cache*/ |
158 | int mismatch_cnt; | |
159 | char text_version[50]; | |
6e46bf34 DW |
160 | void *update_private; /* for passing metadata-format |
161 | * specific update data | |
162 | * between successive calls to | |
163 | * update_super() | |
164 | */ | |
dd15dc4a NB |
165 | |
166 | int container_member; /* for assembling external-metatdata arrays | |
167 | * This is to be used internally by metadata | |
168 | * handler only */ | |
06c7f68e NB |
169 | |
170 | char sys_name[20]; | |
7e0f6979 | 171 | struct mdinfo *devs; |
06c7f68e | 172 | struct mdinfo *next; |
549e9569 NB |
173 | |
174 | /* Device info for mdmon: */ | |
e1516be1 | 175 | int recovery_fd; |
549e9569 | 176 | int state_fd; |
8d45d196 DW |
177 | #define DS_FAULTY 1 |
178 | #define DS_INSYNC 2 | |
179 | #define DS_WRITE_MOSTLY 4 | |
180 | #define DS_SPARE 8 | |
181 | #define DS_BLOCKED 16 | |
182 | #define DS_REMOVE 1024 | |
92967543 | 183 | #define DS_UNBLOCK 2048 |
549e9569 NB |
184 | int prev_state, curr_state, next_state; |
185 | ||
4b1ac34b NB |
186 | }; |
187 | ||
5bbb4842 NB |
188 | struct createinfo { |
189 | int uid; | |
190 | int gid; | |
191 | int autof; | |
192 | int mode; | |
38098016 | 193 | int symlinks; |
058574b1 | 194 | struct supertype *supertype; |
5bbb4842 NB |
195 | }; |
196 | ||
9a9dab36 | 197 | #define Name "mdadm" |
682c7051 | 198 | |
e0d19036 NB |
199 | enum mode { |
200 | ASSEMBLE=1, | |
201 | BUILD, | |
202 | CREATE, | |
203 | MANAGE, | |
204 | MISC, | |
205 | MONITOR, | |
dd0781e5 | 206 | GROW, |
8382f19b | 207 | INCREMENTAL, |
1f48664b | 208 | AUTODETECT, |
e0d19036 NB |
209 | }; |
210 | ||
64c4757e | 211 | extern char short_options[]; |
024768c4 | 212 | extern char short_bitmap_options[]; |
c06487ce | 213 | extern char short_bitmap_auto_options[]; |
64c4757e | 214 | extern struct option long_options[]; |
56eedc1a | 215 | extern char Version[], Usage[], Help[], OptionHelp[], |
dd0781e5 | 216 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
8382f19b | 217 | Help_incr[], |
e0d19036 | 218 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 219 | |
997aed5d NB |
220 | /* for option that don't have short equivilents, we assign arbitrary |
221 | * small numbers. '1' means an undecorated option, so we start at '2'. | |
222 | */ | |
223 | enum special_options { | |
224 | AssumeClean = 2, | |
225 | BitmapChunk, | |
226 | WriteBehind, | |
227 | ReAdd, | |
228 | NoDegraded, | |
229 | Sparc22, | |
230 | BackupFile, | |
231 | HomeHost, | |
589395d6 | 232 | AutoHomeHost, |
38098016 | 233 | Symlinks, |
1f48664b | 234 | AutoDetect, |
1770662b | 235 | Waitclean, |
4cce4069 | 236 | DetailPlatform, |
997aed5d NB |
237 | }; |
238 | ||
64c4757e | 239 | /* structures read from config file */ |
52826846 NB |
240 | /* List of mddevice names and identifiers |
241 | * Identifiers can be: | |
242 | * uuid=128-hex-uuid | |
243 | * super-minor=decimal-minor-number-from-superblock | |
244 | * devices=comma,separated,list,of,device,names,with,wildcards | |
245 | * | |
246 | * If multiple fields are present, the intersection of all matching | |
247 | * devices is considered | |
248 | */ | |
98c6faba | 249 | #define UnSet (0xfffe) |
52826846 | 250 | typedef struct mddev_ident_s { |
dd0781e5 | 251 | char *devname; |
aba69144 | 252 | |
dd0781e5 | 253 | int uuid_set; |
3fa06e9d | 254 | int uuid[4]; |
947fd4dd | 255 | char name[33]; |
52826846 | 256 | |
98c6faba | 257 | unsigned int super_minor; |
52826846 | 258 | |
dd0781e5 | 259 | char *devices; /* comma separated list of device |
52826846 NB |
260 | * names with wild cards |
261 | */ | |
dd0781e5 | 262 | int level; |
98c6faba NB |
263 | unsigned int raid_disks; |
264 | unsigned int spare_disks; | |
82d9eba6 | 265 | struct supertype *st; |
dd0781e5 NB |
266 | int autof; /* 1 for normal, 2 for partitioned */ |
267 | char *spare_group; | |
7ef02d01 | 268 | char *bitmap_file; |
c82f047c | 269 | int bitmap_fd; |
dd0781e5 | 270 | |
1771a6e2 N |
271 | char *container; /* /dev/whatever name of container, or |
272 | * uuid of container. You would expect | |
273 | * this to be the 'devname' or UUID | |
dbb44303 N |
274 | * of some other entry. |
275 | */ | |
276 | char *member; /* subarray within a container */ | |
277 | ||
52826846 NB |
278 | struct mddev_ident_s *next; |
279 | } *mddev_ident_t; | |
64c4757e NB |
280 | |
281 | /* List of device names - wildcards expanded */ | |
282 | typedef struct mddev_dev_s { | |
283 | char *devname; | |
cd29a5c8 NB |
284 | char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. |
285 | * Not set for names read from .config | |
286 | */ | |
b3d31955 | 287 | char writemostly; /* 1 for 'set writemostly', 2 for 'clear writemostly' */ |
fe80f49b | 288 | char re_add; |
811e6cbe | 289 | char used; /* set when used */ |
9008ed1c N |
290 | struct mdinfo *content; /* If devname is a container, this might list |
291 | * the remaining member arrays. */ | |
64c4757e NB |
292 | struct mddev_dev_s *next; |
293 | } *mddev_dev_t; | |
294 | ||
682c7051 NB |
295 | typedef struct mapping { |
296 | char *name; | |
297 | int num; | |
298 | } mapping_t; | |
299 | ||
e0d19036 NB |
300 | |
301 | struct mdstat_ent { | |
302 | char *dev; | |
303 | int devnum; | |
304 | int active; | |
305 | char *level; | |
306 | char *pattern; /* U or up, _ for down */ | |
307 | int percent; /* -1 if no resync */ | |
e5329c37 | 308 | int resync; /* 1 if resync, 0 if recovery */ |
549e9569 NB |
309 | int devcnt; |
310 | int raid_disks; | |
311 | int chunk_size; | |
312 | char * metadata_version; | |
e0d19036 NB |
313 | struct mdstat_ent *next; |
314 | }; | |
315 | ||
22a88995 | 316 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
e0d19036 | 317 | extern void free_mdstat(struct mdstat_ent *ms); |
dd0781e5 | 318 | extern void mdstat_wait(int seconds); |
1ed3f387 | 319 | extern void mdstat_wait_fd(int fd, const sigset_t *sigmask); |
8382f19b NB |
320 | extern int mddev_busy(int devnum); |
321 | ||
322 | struct map_ent { | |
323 | struct map_ent *next; | |
324 | int devnum; | |
1522c538 | 325 | char metadata[20]; |
8382f19b | 326 | int uuid[4]; |
195254b8 | 327 | int bad; |
8382f19b NB |
328 | char *path; |
329 | }; | |
1522c538 | 330 | extern int map_update(struct map_ent **mpp, int devnum, char *metadata, |
8382f19b NB |
331 | int uuid[4], char *path); |
332 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); | |
f2e55ecc N |
333 | extern struct map_ent *map_by_devnum(struct map_ent **map, int devnum); |
334 | extern struct map_ent *map_by_name(struct map_ent **map, char *name); | |
8382f19b NB |
335 | extern void map_read(struct map_ent **melp); |
336 | extern int map_write(struct map_ent *mel); | |
337 | extern void map_delete(struct map_ent **mapp, int devnum); | |
338 | extern void map_free(struct map_ent *map); | |
339 | extern void map_add(struct map_ent **melp, | |
1522c538 | 340 | int devnum, char *metadata, int uuid[4], char *path); |
ad5bc697 N |
341 | extern int map_lock(struct map_ent **melp); |
342 | extern void map_unlock(struct map_ent **melp); | |
e0d19036 | 343 | |
e86c9dd6 | 344 | /* various details can be requested */ |
dab4a513 DW |
345 | enum sysfs_read_flags { |
346 | GET_LEVEL = (1 << 0), | |
347 | GET_LAYOUT = (1 << 1), | |
348 | GET_COMPONENT = (1 << 2), | |
349 | GET_CHUNK = (1 << 3), | |
350 | GET_CACHE = (1 << 4), | |
351 | GET_MISMATCH = (1 << 5), | |
352 | GET_VERSION = (1 << 6), | |
353 | GET_DISKS = (1 << 7), | |
354 | GET_DEGRADED = (1 << 8), | |
355 | GET_SAFEMODE = (1 << 9), | |
356 | GET_DEVS = (1 << 10), /* gets role, major, minor */ | |
357 | GET_OFFSET = (1 << 11), | |
358 | GET_SIZE = (1 << 12), | |
359 | GET_STATE = (1 << 13), | |
360 | GET_ERROR = (1 << 14), | |
361 | SKIP_GONE_DEVS = (1 << 15), | |
362 | }; | |
e86c9dd6 NB |
363 | |
364 | /* If fd >= 0, get the array it is open on, | |
365 | * else use devnum. >=0 -> major9. <0..... | |
366 | */ | |
549e9569 | 367 | extern int sysfs_open(int devnum, char *devname, char *attr); |
f35f2525 | 368 | extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum); |
7e0f6979 NB |
369 | extern void sysfs_free(struct mdinfo *sra); |
370 | extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options); | |
1770662b DW |
371 | extern int sysfs_attr_match(const char *attr, const char *str); |
372 | extern int sysfs_match_word(const char *word, char **list); | |
7e0f6979 | 373 | extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 374 | char *name, char *val); |
7e0f6979 | 375 | extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 376 | char *name, unsigned long long val); |
97590376 | 377 | extern int sysfs_uevent(struct mdinfo *sra, char *event); |
7236ee7a N |
378 | extern int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev, |
379 | char *name); | |
380 | extern int sysfs_fd_get_ll(int fd, unsigned long long *val); | |
7e0f6979 | 381 | extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 382 | char *name, unsigned long long *val); |
7236ee7a | 383 | extern int sysfs_fd_get_str(int fd, char *val, int size); |
93ecfa01 N |
384 | extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
385 | char *name, char *val, int size); | |
8ed3e5e1 | 386 | extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms); |
f35f2525 | 387 | extern int sysfs_set_array(struct mdinfo *info, int vers); |
462906cd N |
388 | extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, |
389 | int in_sync); | |
f1665f72 | 390 | extern int sysfs_disk_to_scsi_id(int fd, __u32 *id); |
f94d52f4 | 391 | extern int sysfs_unique_holder(int devnum, long rdev); |
c69b251b | 392 | extern int load_sys(char *path, char *buf); |
e86c9dd6 NB |
393 | |
394 | ||
395 | extern int save_stripes(int *source, unsigned long long *offsets, | |
396 | int raid_disks, int chunk_size, int level, int layout, | |
397 | int nwrites, int *dest, | |
a6288483 N |
398 | unsigned long long start, unsigned long long length, |
399 | char *buf); | |
353632d9 NB |
400 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
401 | int raid_disks, int chunk_size, int level, int layout, | |
402 | int source, unsigned long long read_offset, | |
403 | unsigned long long start, unsigned long long length); | |
e86c9dd6 | 404 | |
52826846 NB |
405 | #ifndef Sendmail |
406 | #define Sendmail "/usr/lib/sendmail -t" | |
407 | #endif | |
408 | ||
773135f5 NB |
409 | #define SYSLOG_FACILITY LOG_DAEMON |
410 | ||
682c7051 NB |
411 | extern char *map_num(mapping_t *map, int num); |
412 | extern int map_name(mapping_t *map, char *name); | |
b640a252 | 413 | extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[]; |
682c7051 | 414 | |
16c6fa80 | 415 | extern char *map_dev(int major, int minor, int create); |
64c4757e | 416 | |
549e9569 | 417 | struct active_array; |
2e735d19 | 418 | struct metadata_update; |
64c4757e | 419 | |
6adfd3af NB |
420 | /* A superswitch provides entry point the a metadata handler. |
421 | * | |
422 | * The super_switch primarily operates on some "metadata" that | |
423 | * is accessed via the 'supertype'. | |
424 | * This metadata has one of three possible sources. | |
425 | * 1/ It is read from a single device. In this case it may not completely | |
426 | * describe the array or arrays as some information might be on other | |
427 | * devices. | |
428 | * 2/ It is read from all devices in a container. In this case all | |
429 | * information is present. | |
430 | * 3/ It is created by ->init_super / ->add_to_super. In this case it will | |
431 | * be complete once enough ->add_to_super calls have completed. | |
432 | * | |
433 | * When creating an array inside a container, the metadata will be | |
434 | * formed by a combination of 2 and 3. The metadata or the array is read, | |
435 | * then new information is added. | |
436 | * | |
437 | * The metadata must sometimes have a concept of a 'current' array | |
438 | * and a 'current' device. | |
439 | * The 'current' array is set by init_super to be the newly created array, | |
440 | * or is set by super_by_fd when it finds it is looking at an array inside | |
441 | * a container. | |
442 | * | |
443 | * The 'current' device is either the device that the metadata was read from | |
444 | * in case 1, or the last device added by add_to_super in case 3. | |
445 | * Case 2 does not identify a 'current' device. | |
446 | */ | |
f9ce90ba | 447 | extern struct superswitch { |
6adfd3af NB |
448 | |
449 | /* Used to report details of metadata read from a component | |
450 | * device. ->load_super has been called. | |
451 | */ | |
3da92f27 | 452 | void (*examine_super)(struct supertype *st, char *homehost); |
061f2c6a | 453 | void (*brief_examine_super)(struct supertype *st, int verbose); |
4737ae25 | 454 | void (*brief_examine_subarrays)(struct supertype *st, int verbose); |
0d726f17 | 455 | void (*export_examine_super)(struct supertype *st); |
6adfd3af NB |
456 | |
457 | /* Used to report details of an active array. | |
458 | * ->load_super was possibly given a 'component' string. | |
459 | */ | |
3da92f27 | 460 | void (*detail_super)(struct supertype *st, char *homehost); |
3da92f27 | 461 | void (*brief_detail_super)(struct supertype *st); |
0d726f17 | 462 | void (*export_detail_super)(struct supertype *st); |
6adfd3af | 463 | |
4cce4069 | 464 | /* Optional: platform hardware / firmware details */ |
5615172f | 465 | int (*detail_platform)(int verbose, int enumerate_only); |
4cce4069 | 466 | |
6adfd3af NB |
467 | /* Used: |
468 | * to get uuid to storing in bitmap metadata | |
469 | * and 'reshape' backup-data metadata | |
470 | * To see if a device is being re-added to an array it was part of. | |
471 | */ | |
3da92f27 | 472 | void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
6adfd3af | 473 | |
8592f29d | 474 | /* Extract generic details from metadata. This could be details about |
6adfd3af NB |
475 | * the container, or about an individual array within the container. |
476 | * The determination is made either by: | |
477 | * load_super being given a 'component' string. | |
478 | * validate_geometry determining what to create. | |
d2ca6449 NB |
479 | * The info includes both array information and device information. |
480 | * The particular device should be: | |
481 | * The last device added by add_to_super | |
482 | * The device the metadata was loaded from by load_super | |
6adfd3af | 483 | */ |
3da92f27 | 484 | void (*getinfo_super)(struct supertype *st, struct mdinfo *info); |
6adfd3af NB |
485 | |
486 | /* Check if the given metadata is flagged as belonging to "this" | |
9362c1c8 | 487 | * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost" |
6adfd3af | 488 | */ |
3da92f27 | 489 | int (*match_home)(struct supertype *st, char *homehost); |
6adfd3af NB |
490 | |
491 | /* Make one of several generic modifications to metadata | |
492 | * prior to assembly (or other times). | |
493 | * sparc2.2 - first bug in early 0.90 metadata | |
494 | * super-minor - change name of 0.90 metadata | |
495 | * summaries - 'correct' any redundant data | |
496 | * resync - mark array as dirty to trigger a resync. | |
497 | * uuid - set new uuid - only 0.90 or 1.x | |
498 | * name - change the name of the array (where supported) | |
499 | * homehost - change which host this array is tied to. | |
500 | * devicesize - If metadata is at start of device, change recorded | |
501 | * device size to match actual device size | |
502 | * byteorder - swap bytes for 0.90 metadata | |
503 | * | |
504 | * force-one - mark that device as uptodate, not old or failed. | |
505 | * force-array - mark array as clean if it would not otherwise | |
506 | * assemble | |
507 | * assemble - not sure how this is different from force-one... | |
508 | * linear-grow-new - add a new device to a linear array, but don't | |
509 | * change the size: so superblock still matches | |
510 | * linear-grow-update - now change the size of the array. | |
511 | */ | |
68c7d6d7 | 512 | int (*update_super)(struct supertype *st, struct mdinfo *info, |
3da92f27 | 513 | char *update, |
e5eac01f NB |
514 | char *devname, int verbose, |
515 | int uuid_set, char *homehost); | |
6adfd3af NB |
516 | |
517 | /* Create new metadata for new array as described. This could | |
518 | * be a new container, or an array in a pre-existing container. | |
519 | * Also used to zero metadata prior to writing it to invalidate old | |
520 | * metadata. | |
521 | */ | |
3da92f27 NB |
522 | int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
523 | unsigned long long size, char *name, | |
524 | char *homehost, int *uuid); | |
6adfd3af NB |
525 | |
526 | /* update the metadata to include new device, either at create or | |
527 | * when hot-adding a spare. | |
528 | */ | |
f20c3968 | 529 | int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
111d01fc | 530 | int fd, char *devname); |
6adfd3af NB |
531 | |
532 | /* Write metadata to one device when fixing problems or adding | |
533 | * a new device. | |
534 | */ | |
3da92f27 | 535 | int (*store_super)(struct supertype *st, int fd); |
6adfd3af NB |
536 | |
537 | /* Write all metadata for this array. | |
538 | */ | |
111d01fc | 539 | int (*write_init_super)(struct supertype *st); |
64557c33 | 540 | int (*compare_super)(struct supertype *st, struct supertype *tst); |
3da92f27 | 541 | int (*load_super)(struct supertype *st, int fd, char *devname); |
82d9eba6 | 542 | struct supertype * (*match_metadata_desc)(char *arg); |
1bf4e2d9 | 543 | __u64 (*avail_size)(struct supertype *st, __u64 size); |
3da92f27 | 544 | int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
199171a2 | 545 | int delay, int write_behind, |
f9c25f1d | 546 | unsigned long long size, int may_change, int major); |
3da92f27 NB |
547 | void (*locate_bitmap)(struct supertype *st, int fd); |
548 | int (*write_bitmap)(struct supertype *st, int fd); | |
549 | void (*free_super)(struct supertype *st); | |
78e44928 NB |
550 | |
551 | /* validate_geometry is called with an st returned by | |
552 | * match_metadata_desc. | |
553 | * It should check that the geometry described in compatible with | |
554 | * the metadata type. It will be called repeatedly as devices | |
555 | * added to validate changing size and new devices. If there are | |
556 | * inter-device dependencies, it should record sufficient details | |
557 | * so these can be validated. | |
e46273eb | 558 | * Both 'size' and '*freesize' are in sectors. chunk is bytes. |
78e44928 | 559 | */ |
17f25ca6 NB |
560 | int (*validate_geometry)(struct supertype *st, int level, int layout, |
561 | int raiddisks, | |
562 | int chunk, unsigned long long size, | |
2c514b71 NB |
563 | char *subdev, unsigned long long *freesize, |
564 | int verbose); | |
598f0d58 NB |
565 | |
566 | struct mdinfo *(*container_content)(struct supertype *st); | |
a18a888e DW |
567 | /* Allow a metadata handler to override mdadm's default layouts */ |
568 | int (*default_layout)(int level); /* optional */ | |
598f0d58 | 569 | |
549e9569 | 570 | /* for mdmon */ |
cba0191b NB |
571 | int (*open_new)(struct supertype *c, struct active_array *a, |
572 | char *inst); | |
ed9d66aa NB |
573 | |
574 | /* Tell the metadata handler the current state of the array. | |
575 | * This covers whether it is known to be consistent (no pending writes) | |
01f157d7 | 576 | * and how far along a resync is known to have progressed |
ed9d66aa NB |
577 | * (in a->resync_start). |
578 | * resync status is really irrelevant if the array is not consistent, | |
579 | * but some metadata (DDF!) have a place to record the distinction. | |
01f157d7 N |
580 | * If 'consistent' is '2', then the array can mark it dirty if a |
581 | * resync/recovery/whatever is required, or leave it clean if not. | |
582 | * Return value is 0 dirty (not consistent) and 1 if clean. | |
583 | * it is only really important if consistent is passed in as '2'. | |
4e5528c6 | 584 | */ |
01f157d7 | 585 | int (*set_array_state)(struct active_array *a, int consistent); |
7a7cc504 NB |
586 | |
587 | /* When the state of a device might have changed, we call set_disk to | |
588 | * tell the metadata what the current state is. | |
589 | * Typically this happens on spare->in_sync and (spare|in_sync)->faulty | |
590 | * transitions. | |
591 | * set_disk might be called when the state of the particular disk has | |
592 | * not in fact changed. | |
593 | */ | |
8d45d196 | 594 | void (*set_disk)(struct active_array *a, int n, int state); |
2e735d19 NB |
595 | void (*sync_metadata)(struct supertype *st); |
596 | void (*process_update)(struct supertype *st, | |
597 | struct metadata_update *update); | |
edd8d13c NB |
598 | void (*prepare_update)(struct supertype *st, |
599 | struct metadata_update *update); | |
549e9569 | 600 | |
6c3fb95c NB |
601 | /* activate_spare will check if the array is degraded and, if it |
602 | * is, try to find some spare space in the container. | |
603 | * On success, it add appropriate updates (For process_update) to | |
604 | * to the 'updates' list and returns a list of 'mdinfo' identifying | |
605 | * the device, or devices as there might be multiple missing | |
606 | * devices and multiple spares available. | |
607 | */ | |
608 | struct mdinfo *(*activate_spare)(struct active_array *a, | |
609 | struct metadata_update **updates); | |
549e9569 | 610 | |
f277ce36 | 611 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
d03373f1 | 612 | int external; |
4cce4069 | 613 | const char *name; /* canonical metadata name */ |
0063ecba | 614 | } super0, super1, super_ddf, *superlist[]; |
82d9eba6 | 615 | |
0063ecba | 616 | extern struct superswitch super_imsm; |
cdddbdbc | 617 | |
edd8d13c NB |
618 | struct metadata_update { |
619 | int len; | |
620 | char *buf; | |
621 | void *space; /* allocated space that monitor will use */ | |
622 | struct metadata_update *next; | |
623 | }; | |
624 | ||
6adfd3af NB |
625 | /* A supertype holds a particular collection of metadata. |
626 | * It identifies the metadata type by the superswitch, and the particular | |
627 | * sub-version of that metadata type. | |
628 | * metadata read in or created is stored in 'sb' and 'info'. | |
629 | * There are also fields used by mdmon to track containers. | |
630 | * | |
352452c3 N |
631 | * A supertype may refer to: |
632 | * Just an array, possibly in a container | |
633 | * A container, not identifying any particular array | |
634 | * Info read from just one device, not yet fully describing the array/container. | |
635 | * | |
636 | * | |
6adfd3af NB |
637 | * A supertype is created by: |
638 | * super_by_fd | |
639 | * guess_super | |
640 | * dup_super | |
641 | */ | |
82d9eba6 NB |
642 | struct supertype { |
643 | struct superswitch *ss; | |
644 | int minor_version; | |
ea329559 | 645 | int max_devs; |
2f6079dc | 646 | int container_dev; /* devnum of container */ |
f7e7067b | 647 | char subarray[32]; /* name of array inside container */ |
64557c33 | 648 | void *sb; |
111d01fc | 649 | void *info; |
352452c3 N |
650 | int loaded_container; /* Set if load_super found a container, |
651 | * not just one device */ | |
549e9569 | 652 | |
edd8d13c NB |
653 | struct metadata_update *updates; |
654 | struct metadata_update **update_tail; | |
655 | ||
549e9569 NB |
656 | /* extra stuff used by mdmon */ |
657 | struct active_array *arrays; | |
549e9569 | 658 | int sock; /* listen to external programs */ |
549e9569 NB |
659 | int devnum; |
660 | char *devname; /* e.g. md0. This appears in metadata_verison: | |
661 | * external:/md0/12 | |
662 | */ | |
663 | int devcnt; | |
664 | ||
665 | struct mdinfo *devs; | |
666 | ||
82d9eba6 | 667 | }; |
f9ce90ba | 668 | |
1686dc25 | 669 | extern struct supertype *super_by_fd(int fd); |
82d9eba6 | 670 | extern struct supertype *guess_super(int fd); |
3da92f27 | 671 | extern struct supertype *dup_super(struct supertype *st); |
beae1dfe | 672 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
8382f19b NB |
673 | extern void get_one_disk(int mdfd, mdu_array_info_t *ainf, |
674 | mdu_disk_info_t *disk); | |
a7c6e3fb | 675 | void wait_for(char *dev, int fd); |
f9ce90ba | 676 | |
838acbc2 NB |
677 | #if __GNUC__ < 3 |
678 | struct stat64; | |
679 | #endif | |
680 | ||
45e878bb NB |
681 | #define HAVE_NFTW we assume |
682 | #define HAVE_FTW | |
683 | ||
2df1f269 | 684 | #ifdef __UCLIBC__ |
45e878bb | 685 | # include <features.h> |
2df1f269 BRF |
686 | # ifndef __UCLIBC_HAS_LFS__ |
687 | # define lseek64 lseek | |
688 | # endif | |
45e878bb NB |
689 | # ifndef __UCLIBC_HAS_FTW__ |
690 | # undef HAVE_FTW | |
691 | # undef HAVE_NFTW | |
692 | # endif | |
693 | #endif | |
694 | ||
695 | #ifdef __dietlibc__ | |
696 | # undef HAVE_NFTW | |
697 | #endif | |
698 | ||
e39b673e | 699 | #if defined(__KLIBC__) |
700 | # undef HAVE_NFTW | |
701 | # undef HAVE_FTW | |
702 | #endif | |
703 | ||
45e878bb | 704 | #ifndef HAVE_NFTW |
173fc515 | 705 | # define FTW_PHYS 1 |
45e878bb NB |
706 | # ifndef HAVE_FTW |
707 | struct FTW {}; | |
173fc515 NB |
708 | # endif |
709 | #endif | |
710 | ||
45e878bb NB |
711 | #ifdef HAVE_FTW |
712 | # include <ftw.h> | |
713 | #endif | |
714 | ||
173fc515 NB |
715 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); |
716 | ||
f9ce90ba | 717 | |
64c4757e | 718 | extern int Manage_ro(char *devname, int fd, int readonly); |
91f068bf | 719 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); |
dd0781e5 | 720 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); |
64c4757e | 721 | extern int Manage_subdevs(char *devname, int fd, |
dab6685f | 722 | mddev_dev_t devlist, int verbose); |
1f48664b | 723 | extern int autodetect(void); |
e5329c37 | 724 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
8fac0577 | 725 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force); |
06b0d786 | 726 | extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file, |
e86c9dd6 | 727 | long long size, |
19678e53 | 728 | int level, char *layout_str, int chunksize, int raid_disks); |
06b0d786 | 729 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
ea0ebe96 | 730 | int *fdlist, int cnt, char *backup_file, int verbose); |
e9e43ec3 N |
731 | extern int Grow_continue(int mdfd, struct supertype *st, |
732 | struct mdinfo *info, char *backup_file); | |
64c4757e | 733 | |
7f91af49 | 734 | extern int Assemble(struct supertype *st, char *mddev, |
52826846 | 735 | mddev_ident_t ident, |
06b0d786 | 736 | mddev_dev_t devlist, char *backup_file, |
64c4757e | 737 | int readonly, int runstop, |
0ac91628 | 738 | char *update, char *homehost, int require_homehost, |
64c4757e NB |
739 | int verbose, int force); |
740 | ||
7f91af49 N |
741 | extern int Build(char *mddev, int chunk, int level, int layout, |
742 | int raiddisks, mddev_dev_t devlist, int assume_clean, | |
743 | char *bitmap_file, int bitmap_chunk, int write_behind, | |
83208785 | 744 | int delay, int verbose, int autof, unsigned long long size); |
64c4757e NB |
745 | |
746 | ||
7f91af49 | 747 | extern int Create(struct supertype *st, char *mddev, |
5dd497ee | 748 | int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, |
3d3dd91e | 749 | char *name, char *homehost, int *uuid, |
cd29a5c8 | 750 | int subdevs, mddev_dev_t devlist, |
47d79ef8 | 751 | int runstop, int verbose, int force, int assume_clean, |
7f91af49 | 752 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int autof); |
64c4757e | 753 | |
54bad364 | 754 | extern int Detail(char *dev, int brief, int export, int test, char *homehost); |
4cce4069 | 755 | extern int Detail_Platform(struct superswitch *ss, int scan, int verbose); |
e0d19036 | 756 | extern int Query(char *dev); |
0d726f17 KS |
757 | extern int Examine(mddev_dev_t devlist, int brief, int export, int scan, |
758 | int SparcAdjust, struct supertype *forcest, char *homehost); | |
cd29a5c8 | 759 | extern int Monitor(mddev_dev_t devlist, |
e0d19036 | 760 | char *mailaddr, char *alert_cmd, |
aa88f531 | 761 | int period, int daemonise, int scan, int oneshot, |
9a36a9b7 | 762 | int dosyslog, int test, char *pidfile, int increments); |
64c4757e | 763 | |
9277cc77 | 764 | extern int Kill(char *dev, struct supertype *st, int force, int quiet, int noexcl); |
b90c0e9a | 765 | extern int Wait(char *dev); |
9f1da824 | 766 | extern int WaitClean(char *dev, int sock, int verbose); |
9a9dab36 | 767 | |
8382f19b | 768 | extern int Incremental(char *devname, int verbose, int runstop, |
0ac91628 N |
769 | struct supertype *st, char *homehost, int require_homehost, |
770 | int autof); | |
598f0d58 | 771 | extern int Incremental_container(struct supertype *st, char *devname, |
215bb3f7 N |
772 | int verbose, int runstop, int autof, |
773 | int trustworthy); | |
8382f19b NB |
774 | extern void RebuildMap(void); |
775 | extern int IncrementalScan(int verbose); | |
776 | ||
c82f047c NB |
777 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
778 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 779 | unsigned long write_behind, |
dcec9ee5 NB |
780 | unsigned long long array_size, |
781 | int major); | |
55935d51 | 782 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
bf4fb153 | 783 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
2a528478 | 784 | extern unsigned long bitmap_sectors(struct bitmap_super_s *bsb); |
c82f047c | 785 | |
64c4757e | 786 | extern int md_get_version(int fd); |
e0d19036 | 787 | extern int get_linux_version(void); |
84e11361 | 788 | extern long long parse_size(char *size); |
64c4757e | 789 | extern int parse_uuid(char *str, int uuid[4]); |
4a06e2c2 N |
790 | extern int parse_layout_10(char *layout); |
791 | extern int parse_layout_faulty(char *layout); | |
682c7051 NB |
792 | extern int check_ext2(int fd, char *name); |
793 | extern int check_reiser(int fd, char *name); | |
794 | extern int check_raid(int fd, char *name); | |
64c4757e | 795 | |
dd0781e5 | 796 | extern int get_mdp_major(void); |
8b0dabea | 797 | extern int dev_open(char *dev, int flags); |
e8a70c89 | 798 | extern int open_dev(int devnum); |
a931db9e | 799 | extern int open_dev_excl(int devnum); |
8d80900b | 800 | extern int is_standard(char *dev, int *nump); |
9008ed1c | 801 | extern int same_dev(char *one, char *two); |
dd0781e5 | 802 | |
f1ae21c4 | 803 | extern int parse_auto(char *str, char *msg, int config); |
8aec876d NB |
804 | extern mddev_ident_t conf_get_ident(char *dev); |
805 | extern mddev_dev_t conf_get_devs(void); | |
8382f19b | 806 | extern int conf_test_dev(char *devname); |
31015d57 | 807 | extern int conf_test_metadata(const char *version); |
8aec876d NB |
808 | extern struct createinfo *conf_get_create_info(void); |
809 | extern void set_conffile(char *file); | |
810 | extern char *conf_get_mailaddr(void); | |
811 | extern char *conf_get_mailfrom(void); | |
812 | extern char *conf_get_program(void); | |
0ac91628 | 813 | extern char *conf_get_homehost(int *require_homehostp); |
e0d19036 | 814 | extern char *conf_line(FILE *file); |
98c6faba | 815 | extern char *conf_word(FILE *file, int allow_key); |
0ac91628 N |
816 | extern int conf_name_is_free(char *name); |
817 | extern int devname_matches(char *name, char *match); | |
360b4636 | 818 | extern struct mddev_ident_s *conf_match(struct mdinfo *info, struct supertype *st); |
0ac91628 | 819 | |
e0d19036 NB |
820 | extern void free_line(char *line); |
821 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 822 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
36ba7d48 | 823 | extern const int uuid_match_any[4]; |
f277ce36 | 824 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
350f29f9 | 825 | extern void copy_uuid(void *a, int b[4], int swapuuid); |
aae5a112 | 826 | extern char *__fname_from_uuid(int id[4], int swap, char *buf, char sep); |
d7288ddc | 827 | extern char *fname_from_uuid(struct supertype *st, |
ff54de6e | 828 | struct mdinfo *info, char *buf, char sep); |
4b1ac34b | 829 | extern unsigned long calc_csum(void *super, int bytes); |
583315d9 | 830 | extern int enough(int level, int raid_disks, int layout, int clean, |
265e0f17 | 831 | char *avail, int avail_disks); |
e0d19036 | 832 | extern int ask(char *mesg); |
8fac0577 | 833 | extern unsigned long long get_component_size(int fd); |
0430ed48 | 834 | extern void remove_partitions(int fd); |
5f8097be NB |
835 | extern unsigned long long calc_array_size(int level, int raid_disks, int layout, |
836 | int chunksize, unsigned long long devsize); | |
edd8d13c NB |
837 | extern int flush_metadata_updates(struct supertype *st); |
838 | extern void append_metadata_update(struct supertype *st, void *buf, int len); | |
6234c63c DW |
839 | extern int assemble_container_content(struct supertype *st, int mdfd, |
840 | struct mdinfo *content, int runstop, | |
841 | char *chosen_name, int verbose); | |
e0d19036 | 842 | |
7801ac20 N |
843 | extern int add_disk(int mdfd, struct supertype *st, |
844 | struct mdinfo *sra, struct mdinfo *info); | |
f35f2525 | 845 | extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info); |
cd29a5c8 | 846 | |
56eb10c0 | 847 | extern char *human_size(long long bytes); |
e4965ef8 N |
848 | extern char *human_size_brief(long long bytes); |
849 | extern void print_r10_layout(int layout); | |
e0d19036 | 850 | |
63152c1b NB |
851 | #define NoMdDev (1<<23) |
852 | extern int find_free_devnum(int use_partitions); | |
853 | ||
e0d19036 NB |
854 | extern void put_md_name(char *name); |
855 | extern char *get_md_name(int dev); | |
856 | ||
c913b90e | 857 | extern char DefaultConfFile[]; |
b5e64645 | 858 | |
69207ff6 N |
859 | extern int create_mddev(char *dev, char *name, int autof, int trustworthy, |
860 | char *chosen); | |
861 | /* values for 'trustworthy' */ | |
862 | #define LOCAL 1 | |
863 | #define FOREIGN 2 | |
864 | #define METADATA 3 | |
6be1d39d | 865 | extern int open_mddev(char *dev, int report_errors); |
a322f70c | 866 | extern int open_container(int fd); |
b5e64645 | 867 | |
a931db9e NB |
868 | extern int mdmon_running(int devnum); |
869 | extern int signal_mdmon(int devnum); | |
40ebbb9c | 870 | extern int check_env(char *name); |
148acb7b | 871 | extern __u32 random32(void); |
8850ee3e | 872 | extern int start_mdmon(int devnum); |
a931db9e | 873 | |
2f6079dc | 874 | extern char *devnum2devname(int num); |
77472ff8 | 875 | extern int devname2devnum(char *name); |
c94709e8 | 876 | extern int stat2devnum(struct stat *st); |
2f6079dc | 877 | extern int fd2devnum(int fd); |
b5e64645 | 878 | |
a931db9e NB |
879 | static inline int dev2major(int d) |
880 | { | |
881 | if (d >= 0) | |
882 | return MD_MAJOR; | |
883 | else | |
884 | return get_mdp_major(); | |
885 | } | |
886 | ||
887 | static inline int dev2minor(int d) | |
888 | { | |
889 | if (d >= 0) | |
890 | return d; | |
891 | return (-1-d) << MdpMinorShift; | |
892 | } | |
893 | ||
6416d527 NB |
894 | static inline int ROUND_UP(int a, int base) |
895 | { | |
896 | return ((a+base-1)/base)*base; | |
897 | } | |
898 | ||
3c558363 N |
899 | static inline int is_subarray(char *vers) |
900 | { | |
e9dd1598 N |
901 | /* The version string for a 'subarray' (an array in a container) |
902 | * is | |
903 | * /containername/componentname for normal read-write arrays | |
904 | * -containername/componentname for read-only arrays. | |
905 | * containername is e.g. md0, md_d1 | |
906 | * componentname is dependant on the metadata. e.g. '1' 'S1' ... | |
907 | */ | |
908 | return (*vers == '/' || *vers == '-'); | |
3c558363 N |
909 | } |
910 | ||
2a24d7b6 DW |
911 | #ifdef DEBUG |
912 | #define dprintf(fmt, arg...) \ | |
913 | fprintf(stderr, fmt, ##arg) | |
914 | #else | |
915 | #define dprintf(fmt, arg...) \ | |
916 | ({ if (0) fprintf(stderr, fmt, ##arg); 0; }) | |
917 | #endif | |
1a0ee0ba DK |
918 | #include <assert.h> |
919 | #include <stdarg.h> | |
920 | static inline int xasprintf(char **strp, const char *fmt, ...) { | |
921 | va_list ap; | |
922 | int ret; | |
923 | va_start(ap, fmt); | |
089485cb | 924 | ret = vasprintf(strp, fmt, ap); |
1a0ee0ba DK |
925 | va_end(ap); |
926 | assert(ret >= 0); | |
927 | return ret; | |
928 | } | |
2a24d7b6 | 929 | |
b5e64645 NB |
930 | #define LEVEL_MULTIPATH (-4) |
931 | #define LEVEL_LINEAR (-1) | |
932 | #define LEVEL_FAULTY (-5) | |
933 | ||
17f25ca6 NB |
934 | /* kernel module doesn't know about these */ |
935 | #define LEVEL_CONTAINER (-100) | |
a322f70c | 936 | #define LEVEL_UNSUPPORTED (-200) |
17f25ca6 | 937 | |
b5e64645 NB |
938 | |
939 | /* faulty stuff */ | |
940 | ||
941 | #define WriteTransient 0 | |
942 | #define ReadTransient 1 | |
943 | #define WritePersistent 2 | |
944 | #define ReadPersistent 3 | |
945 | #define WriteAll 4 /* doesn't go to device */ | |
946 | #define ReadFixable 5 | |
947 | #define Modes 6 | |
948 | ||
949 | #define ClearErrors 31 | |
950 | #define ClearFaults 30 | |
951 | ||
952 | #define AllPersist 100 /* internal use only */ | |
953 | #define NoPersist 101 | |
954 | ||
955 | #define ModeMask 0x1f | |
956 | #define ModeShift 5 | |
fe6729fa NB |
957 | |
958 | ||
959 | #ifdef __TINYC__ | |
960 | #undef minor | |
961 | #undef major | |
962 | #undef makedev | |
963 | #define minor(x) ((x)&0xff) | |
964 | #define major(x) (((x)>>8)&0xff) | |
965 | #define makedev(M,m) (((M)<<8) | (m)) | |
966 | #endif | |
967 | ||
b640a252 | 968 | /* for raid4/5/6 */ |
e86c9dd6 NB |
969 | #define ALGORITHM_LEFT_ASYMMETRIC 0 |
970 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
971 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
972 | #define ALGORITHM_RIGHT_SYMMETRIC 3 | |
b640a252 N |
973 | |
974 | /* Define non-rotating (raid4) algorithms. These allow | |
975 | * conversion of raid4 to raid5. | |
976 | */ | |
977 | #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */ | |
978 | #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */ | |
979 | ||
980 | /* DDF RAID6 layouts differ from md/raid6 layouts in two ways. | |
981 | * Firstly, the exact positioning of the parity block is slightly | |
982 | * different between the 'LEFT_*' modes of md and the "_N_*" modes | |
983 | * of DDF. | |
984 | * Secondly, or order of datablocks over which the Q syndrome is computed | |
985 | * is different. | |
986 | * Consequently we have different layouts for DDF/raid6 than md/raid6. | |
987 | * These layouts are from the DDFv1.2 spec. | |
988 | * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but | |
989 | * leaves RLQ=3 as 'Vendor Specific' | |
990 | */ | |
991 | ||
992 | #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */ | |
993 | #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */ | |
994 | #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */ | |
995 | ||
996 | ||
997 | /* For every RAID5 algorithm we define a RAID6 algorithm | |
998 | * with exactly the same layout for data and parity, and | |
999 | * with the Q block always on the last device (N-1). | |
1000 | * This allows trivial conversion from RAID5 to RAID6 | |
1001 | */ | |
1002 | #define ALGORITHM_LEFT_ASYMMETRIC_6 16 | |
1003 | #define ALGORITHM_RIGHT_ASYMMETRIC_6 17 | |
1004 | #define ALGORITHM_LEFT_SYMMETRIC_6 18 | |
1005 | #define ALGORITHM_RIGHT_SYMMETRIC_6 19 | |
1006 | #define ALGORITHM_PARITY_0_6 20 | |
1007 | #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N | |
1008 |