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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
4f589ad0 | 4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> |
64c4757e NB |
5 | * |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
22 | * Email: <neilb@cse.unsw.edu.au> | |
23 | * Paper: Neil Brown | |
24 | * School of Computer Science and Engineering | |
25 | * The University of New South Wales | |
26 | * Sydney, 2052 | |
27 | * Australia | |
28 | */ | |
29 | ||
4ccdb956 | 30 | #define _GNU_SOURCE |
c2c9bb6f | 31 | #define _FILE_OFFSET_BITS 64 |
64c4757e | 32 | #include <unistd.h> |
e39b673e | 33 | #if !defined(__dietlibc__) && !defined(__KLIBC__) |
64c4757e | 34 | extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence)); |
f783ca4f | 35 | #else |
fffdbe5e | 36 | # if defined(__NO_STAT64) || __WORDSIZE != 32 |
f783ca4f NB |
37 | # define lseek64 lseek |
38 | # endif | |
98c6faba | 39 | #endif |
64c4757e NB |
40 | |
41 | #include <sys/types.h> | |
42 | #include <sys/stat.h> | |
43 | #include <stdlib.h> | |
44 | #include <time.h> | |
11018a45 | 45 | #include <sys/time.h> |
64c4757e NB |
46 | #include <getopt.h> |
47 | #include <fcntl.h> | |
48 | #include <stdio.h> | |
49 | #include <errno.h> | |
50 | #include <string.h> | |
773135f5 | 51 | #include <syslog.h> |
b56c3630 NB |
52 | #ifdef __dietlibc__ |
53 | #include <strings.h> | |
280a927d NB |
54 | /* dietlibc has deprecated random and srandom!! */ |
55 | #define random rand | |
56 | #define srandom srand | |
98c6faba NB |
57 | #endif |
58 | ||
64c4757e NB |
59 | |
60 | #include <linux/kdev_t.h> | |
e0d19036 NB |
61 | /*#include <linux/fs.h> */ |
62 | #include <sys/mount.h> | |
63 | #include <asm/types.h> | |
64c4757e NB |
64 | #include <sys/ioctl.h> |
65 | #define MD_MAJOR 9 | |
dd0781e5 | 66 | #define MdpMinorShift 6 |
64c4757e | 67 | |
e0d19036 | 68 | #ifndef BLKGETSIZE64 |
98c6faba | 69 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ |
e0d19036 | 70 | #endif |
56eb10c0 | 71 | |
c82f047c NB |
72 | #define DEFAULT_BITMAP_CHUNK 4096 |
73 | #define DEFAULT_BITMAP_DELAY 5 | |
dfd4d8ee | 74 | #define DEFAULT_MAX_WRITE_BEHIND 256 |
64c4757e NB |
75 | |
76 | #include "md_u.h" | |
e0d19036 | 77 | #include "md_p.h" |
c82f047c | 78 | #include "bitmap.h" |
f7dd881f | 79 | #include "msg.h" |
64c4757e | 80 | |
1e0d770c | 81 | #include <endian.h> |
efd441d1 NB |
82 | /* Redhat don't like to #include <asm/byteorder.h>, and |
83 | * some time include <linux/byteorder/xxx_endian.h> isn't enough, | |
84 | * and there is no standard conversion function so... */ | |
0ae03b8a NB |
85 | /* And dietlibc doesn't think byteswap is ok, so.. */ |
86 | /* #include <byteswap.h> */ | |
87 | #define bswap_16(x) (((x) & 0x00ffU) << 8 | \ | |
88 | ((x) & 0xff00U) >> 8) | |
89 | #define bswap_32(x) (((x) & 0x000000ffU) << 24 | \ | |
90 | ((x) & 0xff000000U) >> 24 | \ | |
91 | ((x) & 0x0000ff00U) << 8 | \ | |
92 | ((x) & 0x00ff0000U) >> 8) | |
93 | #define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \ | |
94 | ((x) & 0xff00000000000000ULL) >> 56 | \ | |
95 | ((x) & 0x000000000000ff00ULL) << 40 | \ | |
96 | ((x) & 0x00ff000000000000ULL) >> 40 | \ | |
97 | ((x) & 0x0000000000ff0000ULL) << 24 | \ | |
98 | ((x) & 0x0000ff0000000000ULL) >> 24 | \ | |
99 | ((x) & 0x00000000ff000000ULL) << 8 | \ | |
100 | ((x) & 0x000000ff00000000ULL) >> 8) | |
101 | ||
e39b673e | 102 | #if !defined(__KLIBC__) |
efd441d1 NB |
103 | #if BYTE_ORDER == LITTLE_ENDIAN |
104 | #define __cpu_to_le16(_x) (_x) | |
105 | #define __cpu_to_le32(_x) (_x) | |
106 | #define __cpu_to_le64(_x) (_x) | |
107 | #define __le16_to_cpu(_x) (_x) | |
108 | #define __le32_to_cpu(_x) (_x) | |
109 | #define __le64_to_cpu(_x) (_x) | |
974e620d NB |
110 | |
111 | #define __cpu_to_be16(_x) bswap_16(_x) | |
112 | #define __cpu_to_be32(_x) bswap_32(_x) | |
113 | #define __cpu_to_be64(_x) bswap_64(_x) | |
114 | #define __be16_to_cpu(_x) bswap_16(_x) | |
115 | #define __be32_to_cpu(_x) bswap_32(_x) | |
116 | #define __be64_to_cpu(_x) bswap_64(_x) | |
efd441d1 NB |
117 | #elif BYTE_ORDER == BIG_ENDIAN |
118 | #define __cpu_to_le16(_x) bswap_16(_x) | |
119 | #define __cpu_to_le32(_x) bswap_32(_x) | |
120 | #define __cpu_to_le64(_x) bswap_64(_x) | |
121 | #define __le16_to_cpu(_x) bswap_16(_x) | |
122 | #define __le32_to_cpu(_x) bswap_32(_x) | |
123 | #define __le64_to_cpu(_x) bswap_64(_x) | |
974e620d NB |
124 | |
125 | #define __cpu_to_be16(_x) (_x) | |
126 | #define __cpu_to_be32(_x) (_x) | |
127 | #define __cpu_to_be64(_x) (_x) | |
128 | #define __be16_to_cpu(_x) (_x) | |
129 | #define __be32_to_cpu(_x) (_x) | |
130 | #define __be64_to_cpu(_x) (_x) | |
1e0d770c NB |
131 | #else |
132 | # error "unknown endianness." | |
133 | #endif | |
e39b673e | 134 | #endif /* __KLIBC__ */ |
1e0d770c NB |
135 | |
136 | ||
137 | ||
4b1ac34b NB |
138 | /* general information that might be extracted from a superblock */ |
139 | struct mdinfo { | |
140 | mdu_array_info_t array; | |
141 | mdu_disk_info_t disk; | |
142 | __u64 events; | |
fbf8a0b7 | 143 | int uuid[4]; |
31317663 | 144 | char name[33]; |
353632d9 | 145 | unsigned long long data_offset; |
598f0d58 NB |
146 | unsigned long long component_size; /* same as array.size, except in |
147 | * sectors and up to 64bits. | |
148 | */ | |
da9b4a62 DW |
149 | unsigned long long custom_array_size; /* size for non-default sized |
150 | * arrays (in sectors) | |
151 | */ | |
353632d9 NB |
152 | int reshape_active; |
153 | unsigned long long reshape_progress; | |
0fd5c350 | 154 | unsigned long long resync_start; |
a67dd8cc | 155 | unsigned long safe_mode_delay; /* ms delay to mark clean */ |
353632d9 | 156 | int new_level, delta_disks, new_layout, new_chunk; |
06c7f68e | 157 | int errors; |
7e0f6979 NB |
158 | int cache_size; /* size of raid456 stripe cache*/ |
159 | int mismatch_cnt; | |
160 | char text_version[50]; | |
dd15dc4a NB |
161 | |
162 | int container_member; /* for assembling external-metatdata arrays | |
163 | * This is to be used internally by metadata | |
164 | * handler only */ | |
06c7f68e NB |
165 | |
166 | char sys_name[20]; | |
7e0f6979 | 167 | struct mdinfo *devs; |
06c7f68e | 168 | struct mdinfo *next; |
549e9569 NB |
169 | |
170 | /* Device info for mdmon: */ | |
171 | int state_fd; | |
8d45d196 DW |
172 | #define DS_FAULTY 1 |
173 | #define DS_INSYNC 2 | |
174 | #define DS_WRITE_MOSTLY 4 | |
175 | #define DS_SPARE 8 | |
176 | #define DS_BLOCKED 16 | |
177 | #define DS_REMOVE 1024 | |
92967543 | 178 | #define DS_UNBLOCK 2048 |
549e9569 NB |
179 | int prev_state, curr_state, next_state; |
180 | ||
4b1ac34b NB |
181 | }; |
182 | ||
5bbb4842 NB |
183 | struct createinfo { |
184 | int uid; | |
185 | int gid; | |
186 | int autof; | |
187 | int mode; | |
38098016 | 188 | int symlinks; |
058574b1 | 189 | struct supertype *supertype; |
5bbb4842 NB |
190 | }; |
191 | ||
9a9dab36 | 192 | #define Name "mdadm" |
682c7051 | 193 | |
e0d19036 NB |
194 | enum mode { |
195 | ASSEMBLE=1, | |
196 | BUILD, | |
197 | CREATE, | |
198 | MANAGE, | |
199 | MISC, | |
200 | MONITOR, | |
dd0781e5 | 201 | GROW, |
8382f19b | 202 | INCREMENTAL, |
1f48664b | 203 | AUTODETECT, |
e0d19036 NB |
204 | }; |
205 | ||
64c4757e | 206 | extern char short_options[]; |
024768c4 | 207 | extern char short_bitmap_options[]; |
c06487ce | 208 | extern char short_bitmap_auto_options[]; |
64c4757e | 209 | extern struct option long_options[]; |
56eedc1a | 210 | extern char Version[], Usage[], Help[], OptionHelp[], |
dd0781e5 | 211 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
8382f19b | 212 | Help_incr[], |
e0d19036 | 213 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 214 | |
997aed5d NB |
215 | /* for option that don't have short equivilents, we assign arbitrary |
216 | * small numbers. '1' means an undecorated option, so we start at '2'. | |
217 | */ | |
218 | enum special_options { | |
219 | AssumeClean = 2, | |
220 | BitmapChunk, | |
221 | WriteBehind, | |
222 | ReAdd, | |
223 | NoDegraded, | |
224 | Sparc22, | |
225 | BackupFile, | |
226 | HomeHost, | |
589395d6 | 227 | AutoHomeHost, |
38098016 | 228 | Symlinks, |
1f48664b | 229 | AutoDetect, |
1770662b | 230 | Waitclean, |
4cce4069 | 231 | DetailPlatform, |
997aed5d NB |
232 | }; |
233 | ||
64c4757e | 234 | /* structures read from config file */ |
52826846 NB |
235 | /* List of mddevice names and identifiers |
236 | * Identifiers can be: | |
237 | * uuid=128-hex-uuid | |
238 | * super-minor=decimal-minor-number-from-superblock | |
239 | * devices=comma,separated,list,of,device,names,with,wildcards | |
240 | * | |
241 | * If multiple fields are present, the intersection of all matching | |
242 | * devices is considered | |
243 | */ | |
98c6faba | 244 | #define UnSet (0xfffe) |
52826846 | 245 | typedef struct mddev_ident_s { |
dd0781e5 | 246 | char *devname; |
aba69144 | 247 | |
dd0781e5 | 248 | int uuid_set; |
3fa06e9d | 249 | int uuid[4]; |
947fd4dd | 250 | char name[33]; |
52826846 | 251 | |
98c6faba | 252 | unsigned int super_minor; |
52826846 | 253 | |
dd0781e5 | 254 | char *devices; /* comma separated list of device |
52826846 NB |
255 | * names with wild cards |
256 | */ | |
dd0781e5 | 257 | int level; |
98c6faba NB |
258 | unsigned int raid_disks; |
259 | unsigned int spare_disks; | |
82d9eba6 | 260 | struct supertype *st; |
dd0781e5 NB |
261 | int autof; /* 1 for normal, 2 for partitioned */ |
262 | char *spare_group; | |
7ef02d01 | 263 | char *bitmap_file; |
c82f047c | 264 | int bitmap_fd; |
dd0781e5 | 265 | |
1771a6e2 N |
266 | char *container; /* /dev/whatever name of container, or |
267 | * uuid of container. You would expect | |
268 | * this to be the 'devname' or UUID | |
dbb44303 N |
269 | * of some other entry. |
270 | */ | |
271 | char *member; /* subarray within a container */ | |
272 | ||
52826846 NB |
273 | struct mddev_ident_s *next; |
274 | } *mddev_ident_t; | |
64c4757e NB |
275 | |
276 | /* List of device names - wildcards expanded */ | |
277 | typedef struct mddev_dev_s { | |
278 | char *devname; | |
cd29a5c8 NB |
279 | char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. |
280 | * Not set for names read from .config | |
281 | */ | |
b3d31955 | 282 | char writemostly; /* 1 for 'set writemostly', 2 for 'clear writemostly' */ |
fe80f49b | 283 | char re_add; |
811e6cbe | 284 | char used; /* set when used */ |
9008ed1c N |
285 | struct mdinfo *content; /* If devname is a container, this might list |
286 | * the remaining member arrays. */ | |
64c4757e NB |
287 | struct mddev_dev_s *next; |
288 | } *mddev_dev_t; | |
289 | ||
682c7051 NB |
290 | typedef struct mapping { |
291 | char *name; | |
292 | int num; | |
293 | } mapping_t; | |
294 | ||
e0d19036 NB |
295 | |
296 | struct mdstat_ent { | |
297 | char *dev; | |
298 | int devnum; | |
299 | int active; | |
300 | char *level; | |
301 | char *pattern; /* U or up, _ for down */ | |
302 | int percent; /* -1 if no resync */ | |
e5329c37 | 303 | int resync; /* 1 if resync, 0 if recovery */ |
549e9569 NB |
304 | int devcnt; |
305 | int raid_disks; | |
306 | int chunk_size; | |
307 | char * metadata_version; | |
e0d19036 NB |
308 | struct mdstat_ent *next; |
309 | }; | |
310 | ||
22a88995 | 311 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
e0d19036 | 312 | extern void free_mdstat(struct mdstat_ent *ms); |
dd0781e5 | 313 | extern void mdstat_wait(int seconds); |
1ed3f387 | 314 | extern void mdstat_wait_fd(int fd, const sigset_t *sigmask); |
8382f19b NB |
315 | extern int mddev_busy(int devnum); |
316 | ||
317 | struct map_ent { | |
318 | struct map_ent *next; | |
319 | int devnum; | |
1522c538 | 320 | char metadata[20]; |
8382f19b | 321 | int uuid[4]; |
195254b8 | 322 | int bad; |
8382f19b NB |
323 | char *path; |
324 | }; | |
1522c538 | 325 | extern int map_update(struct map_ent **mpp, int devnum, char *metadata, |
8382f19b NB |
326 | int uuid[4], char *path); |
327 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); | |
f2e55ecc N |
328 | extern struct map_ent *map_by_devnum(struct map_ent **map, int devnum); |
329 | extern struct map_ent *map_by_name(struct map_ent **map, char *name); | |
8382f19b NB |
330 | extern void map_read(struct map_ent **melp); |
331 | extern int map_write(struct map_ent *mel); | |
332 | extern void map_delete(struct map_ent **mapp, int devnum); | |
333 | extern void map_free(struct map_ent *map); | |
334 | extern void map_add(struct map_ent **melp, | |
1522c538 | 335 | int devnum, char *metadata, int uuid[4], char *path); |
ad5bc697 N |
336 | extern int map_lock(struct map_ent **melp); |
337 | extern void map_unlock(struct map_ent **melp); | |
e0d19036 | 338 | |
e86c9dd6 | 339 | /* various details can be requested */ |
dab4a513 DW |
340 | enum sysfs_read_flags { |
341 | GET_LEVEL = (1 << 0), | |
342 | GET_LAYOUT = (1 << 1), | |
343 | GET_COMPONENT = (1 << 2), | |
344 | GET_CHUNK = (1 << 3), | |
345 | GET_CACHE = (1 << 4), | |
346 | GET_MISMATCH = (1 << 5), | |
347 | GET_VERSION = (1 << 6), | |
348 | GET_DISKS = (1 << 7), | |
349 | GET_DEGRADED = (1 << 8), | |
350 | GET_SAFEMODE = (1 << 9), | |
351 | GET_DEVS = (1 << 10), /* gets role, major, minor */ | |
352 | GET_OFFSET = (1 << 11), | |
353 | GET_SIZE = (1 << 12), | |
354 | GET_STATE = (1 << 13), | |
355 | GET_ERROR = (1 << 14), | |
356 | SKIP_GONE_DEVS = (1 << 15), | |
357 | }; | |
e86c9dd6 NB |
358 | |
359 | /* If fd >= 0, get the array it is open on, | |
360 | * else use devnum. >=0 -> major9. <0..... | |
361 | */ | |
549e9569 | 362 | extern int sysfs_open(int devnum, char *devname, char *attr); |
f35f2525 | 363 | extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum); |
7e0f6979 NB |
364 | extern void sysfs_free(struct mdinfo *sra); |
365 | extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options); | |
1770662b DW |
366 | extern int sysfs_attr_match(const char *attr, const char *str); |
367 | extern int sysfs_match_word(const char *word, char **list); | |
7e0f6979 | 368 | extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 369 | char *name, char *val); |
7e0f6979 | 370 | extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 371 | char *name, unsigned long long val); |
97590376 | 372 | extern int sysfs_uevent(struct mdinfo *sra, char *event); |
7e0f6979 | 373 | extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 374 | char *name, unsigned long long *val); |
93ecfa01 N |
375 | extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
376 | char *name, char *val, int size); | |
8ed3e5e1 | 377 | extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms); |
f35f2525 | 378 | extern int sysfs_set_array(struct mdinfo *info, int vers); |
462906cd N |
379 | extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, |
380 | int in_sync); | |
f1665f72 | 381 | extern int sysfs_disk_to_scsi_id(int fd, __u32 *id); |
f94d52f4 | 382 | extern int sysfs_unique_holder(int devnum, long rdev); |
c69b251b | 383 | extern int load_sys(char *path, char *buf); |
e86c9dd6 NB |
384 | |
385 | ||
386 | extern int save_stripes(int *source, unsigned long long *offsets, | |
387 | int raid_disks, int chunk_size, int level, int layout, | |
388 | int nwrites, int *dest, | |
389 | unsigned long long start, unsigned long long length); | |
353632d9 NB |
390 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
391 | int raid_disks, int chunk_size, int level, int layout, | |
392 | int source, unsigned long long read_offset, | |
393 | unsigned long long start, unsigned long long length); | |
e86c9dd6 | 394 | |
52826846 NB |
395 | #ifndef Sendmail |
396 | #define Sendmail "/usr/lib/sendmail -t" | |
397 | #endif | |
398 | ||
773135f5 NB |
399 | #define SYSLOG_FACILITY LOG_DAEMON |
400 | ||
682c7051 NB |
401 | extern char *map_num(mapping_t *map, int num); |
402 | extern int map_name(mapping_t *map, char *name); | |
b640a252 | 403 | extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[]; |
682c7051 | 404 | |
16c6fa80 | 405 | extern char *map_dev(int major, int minor, int create); |
64c4757e | 406 | |
549e9569 | 407 | struct active_array; |
2e735d19 | 408 | struct metadata_update; |
64c4757e | 409 | |
6adfd3af NB |
410 | /* A superswitch provides entry point the a metadata handler. |
411 | * | |
412 | * The super_switch primarily operates on some "metadata" that | |
413 | * is accessed via the 'supertype'. | |
414 | * This metadata has one of three possible sources. | |
415 | * 1/ It is read from a single device. In this case it may not completely | |
416 | * describe the array or arrays as some information might be on other | |
417 | * devices. | |
418 | * 2/ It is read from all devices in a container. In this case all | |
419 | * information is present. | |
420 | * 3/ It is created by ->init_super / ->add_to_super. In this case it will | |
421 | * be complete once enough ->add_to_super calls have completed. | |
422 | * | |
423 | * When creating an array inside a container, the metadata will be | |
424 | * formed by a combination of 2 and 3. The metadata or the array is read, | |
425 | * then new information is added. | |
426 | * | |
427 | * The metadata must sometimes have a concept of a 'current' array | |
428 | * and a 'current' device. | |
429 | * The 'current' array is set by init_super to be the newly created array, | |
430 | * or is set by super_by_fd when it finds it is looking at an array inside | |
431 | * a container. | |
432 | * | |
433 | * The 'current' device is either the device that the metadata was read from | |
434 | * in case 1, or the last device added by add_to_super in case 3. | |
435 | * Case 2 does not identify a 'current' device. | |
436 | */ | |
f9ce90ba | 437 | extern struct superswitch { |
6adfd3af NB |
438 | |
439 | /* Used to report details of metadata read from a component | |
440 | * device. ->load_super has been called. | |
441 | */ | |
3da92f27 | 442 | void (*examine_super)(struct supertype *st, char *homehost); |
061f2c6a | 443 | void (*brief_examine_super)(struct supertype *st, int verbose); |
0d726f17 | 444 | void (*export_examine_super)(struct supertype *st); |
6adfd3af NB |
445 | |
446 | /* Used to report details of an active array. | |
447 | * ->load_super was possibly given a 'component' string. | |
448 | */ | |
3da92f27 | 449 | void (*detail_super)(struct supertype *st, char *homehost); |
3da92f27 | 450 | void (*brief_detail_super)(struct supertype *st); |
0d726f17 | 451 | void (*export_detail_super)(struct supertype *st); |
6adfd3af | 452 | |
4cce4069 | 453 | /* Optional: platform hardware / firmware details */ |
5615172f | 454 | int (*detail_platform)(int verbose, int enumerate_only); |
4cce4069 | 455 | |
6adfd3af NB |
456 | /* Used: |
457 | * to get uuid to storing in bitmap metadata | |
458 | * and 'reshape' backup-data metadata | |
459 | * To see if a device is being re-added to an array it was part of. | |
460 | */ | |
3da92f27 | 461 | void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
6adfd3af | 462 | |
8592f29d | 463 | /* Extract generic details from metadata. This could be details about |
6adfd3af NB |
464 | * the container, or about an individual array within the container. |
465 | * The determination is made either by: | |
466 | * load_super being given a 'component' string. | |
467 | * validate_geometry determining what to create. | |
d2ca6449 NB |
468 | * The info includes both array information and device information. |
469 | * The particular device should be: | |
470 | * The last device added by add_to_super | |
471 | * The device the metadata was loaded from by load_super | |
6adfd3af | 472 | */ |
3da92f27 | 473 | void (*getinfo_super)(struct supertype *st, struct mdinfo *info); |
6adfd3af NB |
474 | |
475 | /* Check if the given metadata is flagged as belonging to "this" | |
9362c1c8 | 476 | * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost" |
6adfd3af | 477 | */ |
3da92f27 | 478 | int (*match_home)(struct supertype *st, char *homehost); |
6adfd3af NB |
479 | |
480 | /* Make one of several generic modifications to metadata | |
481 | * prior to assembly (or other times). | |
482 | * sparc2.2 - first bug in early 0.90 metadata | |
483 | * super-minor - change name of 0.90 metadata | |
484 | * summaries - 'correct' any redundant data | |
485 | * resync - mark array as dirty to trigger a resync. | |
486 | * uuid - set new uuid - only 0.90 or 1.x | |
487 | * name - change the name of the array (where supported) | |
488 | * homehost - change which host this array is tied to. | |
489 | * devicesize - If metadata is at start of device, change recorded | |
490 | * device size to match actual device size | |
491 | * byteorder - swap bytes for 0.90 metadata | |
492 | * | |
493 | * force-one - mark that device as uptodate, not old or failed. | |
494 | * force-array - mark array as clean if it would not otherwise | |
495 | * assemble | |
496 | * assemble - not sure how this is different from force-one... | |
497 | * linear-grow-new - add a new device to a linear array, but don't | |
498 | * change the size: so superblock still matches | |
499 | * linear-grow-update - now change the size of the array. | |
500 | */ | |
68c7d6d7 | 501 | int (*update_super)(struct supertype *st, struct mdinfo *info, |
3da92f27 | 502 | char *update, |
e5eac01f NB |
503 | char *devname, int verbose, |
504 | int uuid_set, char *homehost); | |
6adfd3af NB |
505 | |
506 | /* Create new metadata for new array as described. This could | |
507 | * be a new container, or an array in a pre-existing container. | |
508 | * Also used to zero metadata prior to writing it to invalidate old | |
509 | * metadata. | |
510 | */ | |
3da92f27 NB |
511 | int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
512 | unsigned long long size, char *name, | |
513 | char *homehost, int *uuid); | |
6adfd3af NB |
514 | |
515 | /* update the metadata to include new device, either at create or | |
516 | * when hot-adding a spare. | |
517 | */ | |
f20c3968 | 518 | int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
111d01fc | 519 | int fd, char *devname); |
6adfd3af NB |
520 | |
521 | /* Write metadata to one device when fixing problems or adding | |
522 | * a new device. | |
523 | */ | |
3da92f27 | 524 | int (*store_super)(struct supertype *st, int fd); |
6adfd3af NB |
525 | |
526 | /* Write all metadata for this array. | |
527 | */ | |
111d01fc | 528 | int (*write_init_super)(struct supertype *st); |
64557c33 | 529 | int (*compare_super)(struct supertype *st, struct supertype *tst); |
3da92f27 | 530 | int (*load_super)(struct supertype *st, int fd, char *devname); |
82d9eba6 | 531 | struct supertype * (*match_metadata_desc)(char *arg); |
1bf4e2d9 | 532 | __u64 (*avail_size)(struct supertype *st, __u64 size); |
3da92f27 | 533 | int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
199171a2 | 534 | int delay, int write_behind, |
f9c25f1d | 535 | unsigned long long size, int may_change, int major); |
3da92f27 NB |
536 | void (*locate_bitmap)(struct supertype *st, int fd); |
537 | int (*write_bitmap)(struct supertype *st, int fd); | |
538 | void (*free_super)(struct supertype *st); | |
78e44928 NB |
539 | |
540 | /* validate_geometry is called with an st returned by | |
541 | * match_metadata_desc. | |
542 | * It should check that the geometry described in compatible with | |
543 | * the metadata type. It will be called repeatedly as devices | |
544 | * added to validate changing size and new devices. If there are | |
545 | * inter-device dependencies, it should record sufficient details | |
546 | * so these can be validated. | |
e46273eb | 547 | * Both 'size' and '*freesize' are in sectors. chunk is bytes. |
78e44928 | 548 | */ |
17f25ca6 NB |
549 | int (*validate_geometry)(struct supertype *st, int level, int layout, |
550 | int raiddisks, | |
551 | int chunk, unsigned long long size, | |
2c514b71 NB |
552 | char *subdev, unsigned long long *freesize, |
553 | int verbose); | |
598f0d58 NB |
554 | |
555 | struct mdinfo *(*container_content)(struct supertype *st); | |
a18a888e DW |
556 | /* Allow a metadata handler to override mdadm's default layouts */ |
557 | int (*default_layout)(int level); /* optional */ | |
598f0d58 | 558 | |
549e9569 | 559 | /* for mdmon */ |
cba0191b NB |
560 | int (*open_new)(struct supertype *c, struct active_array *a, |
561 | char *inst); | |
ed9d66aa NB |
562 | |
563 | /* Tell the metadata handler the current state of the array. | |
564 | * This covers whether it is known to be consistent (no pending writes) | |
01f157d7 | 565 | * and how far along a resync is known to have progressed |
ed9d66aa NB |
566 | * (in a->resync_start). |
567 | * resync status is really irrelevant if the array is not consistent, | |
568 | * but some metadata (DDF!) have a place to record the distinction. | |
01f157d7 N |
569 | * If 'consistent' is '2', then the array can mark it dirty if a |
570 | * resync/recovery/whatever is required, or leave it clean if not. | |
571 | * Return value is 0 dirty (not consistent) and 1 if clean. | |
572 | * it is only really important if consistent is passed in as '2'. | |
4e5528c6 | 573 | */ |
01f157d7 | 574 | int (*set_array_state)(struct active_array *a, int consistent); |
7a7cc504 NB |
575 | |
576 | /* When the state of a device might have changed, we call set_disk to | |
577 | * tell the metadata what the current state is. | |
578 | * Typically this happens on spare->in_sync and (spare|in_sync)->faulty | |
579 | * transitions. | |
580 | * set_disk might be called when the state of the particular disk has | |
581 | * not in fact changed. | |
582 | */ | |
8d45d196 | 583 | void (*set_disk)(struct active_array *a, int n, int state); |
2e735d19 NB |
584 | void (*sync_metadata)(struct supertype *st); |
585 | void (*process_update)(struct supertype *st, | |
586 | struct metadata_update *update); | |
edd8d13c NB |
587 | void (*prepare_update)(struct supertype *st, |
588 | struct metadata_update *update); | |
549e9569 | 589 | |
6c3fb95c NB |
590 | /* activate_spare will check if the array is degraded and, if it |
591 | * is, try to find some spare space in the container. | |
592 | * On success, it add appropriate updates (For process_update) to | |
593 | * to the 'updates' list and returns a list of 'mdinfo' identifying | |
594 | * the device, or devices as there might be multiple missing | |
595 | * devices and multiple spares available. | |
596 | */ | |
597 | struct mdinfo *(*activate_spare)(struct active_array *a, | |
598 | struct metadata_update **updates); | |
549e9569 | 599 | |
f277ce36 | 600 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
d03373f1 | 601 | int external; |
4cce4069 | 602 | const char *name; /* canonical metadata name */ |
0063ecba | 603 | } super0, super1, super_ddf, *superlist[]; |
82d9eba6 | 604 | |
0063ecba | 605 | extern struct superswitch super_imsm; |
cdddbdbc | 606 | |
edd8d13c NB |
607 | struct metadata_update { |
608 | int len; | |
609 | char *buf; | |
610 | void *space; /* allocated space that monitor will use */ | |
611 | struct metadata_update *next; | |
612 | }; | |
613 | ||
6adfd3af NB |
614 | /* A supertype holds a particular collection of metadata. |
615 | * It identifies the metadata type by the superswitch, and the particular | |
616 | * sub-version of that metadata type. | |
617 | * metadata read in or created is stored in 'sb' and 'info'. | |
618 | * There are also fields used by mdmon to track containers. | |
619 | * | |
352452c3 N |
620 | * A supertype may refer to: |
621 | * Just an array, possibly in a container | |
622 | * A container, not identifying any particular array | |
623 | * Info read from just one device, not yet fully describing the array/container. | |
624 | * | |
625 | * | |
6adfd3af NB |
626 | * A supertype is created by: |
627 | * super_by_fd | |
628 | * guess_super | |
629 | * dup_super | |
630 | */ | |
82d9eba6 NB |
631 | struct supertype { |
632 | struct superswitch *ss; | |
633 | int minor_version; | |
ea329559 | 634 | int max_devs; |
2f6079dc | 635 | int container_dev; /* devnum of container */ |
f7e7067b | 636 | char subarray[32]; /* name of array inside container */ |
64557c33 | 637 | void *sb; |
111d01fc | 638 | void *info; |
352452c3 N |
639 | int loaded_container; /* Set if load_super found a container, |
640 | * not just one device */ | |
549e9569 | 641 | |
edd8d13c NB |
642 | struct metadata_update *updates; |
643 | struct metadata_update **update_tail; | |
644 | ||
549e9569 NB |
645 | /* extra stuff used by mdmon */ |
646 | struct active_array *arrays; | |
549e9569 | 647 | int sock; /* listen to external programs */ |
549e9569 NB |
648 | int devnum; |
649 | char *devname; /* e.g. md0. This appears in metadata_verison: | |
650 | * external:/md0/12 | |
651 | */ | |
652 | int devcnt; | |
653 | ||
654 | struct mdinfo *devs; | |
655 | ||
82d9eba6 | 656 | }; |
f9ce90ba | 657 | |
1686dc25 | 658 | extern struct supertype *super_by_fd(int fd); |
82d9eba6 | 659 | extern struct supertype *guess_super(int fd); |
3da92f27 | 660 | extern struct supertype *dup_super(struct supertype *st); |
beae1dfe | 661 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
8382f19b NB |
662 | extern void get_one_disk(int mdfd, mdu_array_info_t *ainf, |
663 | mdu_disk_info_t *disk); | |
a7c6e3fb | 664 | void wait_for(char *dev, int fd); |
f9ce90ba | 665 | |
838acbc2 NB |
666 | #if __GNUC__ < 3 |
667 | struct stat64; | |
668 | #endif | |
669 | ||
45e878bb NB |
670 | #define HAVE_NFTW we assume |
671 | #define HAVE_FTW | |
672 | ||
2df1f269 | 673 | #ifdef __UCLIBC__ |
45e878bb | 674 | # include <features.h> |
2df1f269 BRF |
675 | # ifndef __UCLIBC_HAS_LFS__ |
676 | # define lseek64 lseek | |
677 | # endif | |
45e878bb NB |
678 | # ifndef __UCLIBC_HAS_FTW__ |
679 | # undef HAVE_FTW | |
680 | # undef HAVE_NFTW | |
681 | # endif | |
682 | #endif | |
683 | ||
684 | #ifdef __dietlibc__ | |
685 | # undef HAVE_NFTW | |
686 | #endif | |
687 | ||
e39b673e | 688 | #if defined(__KLIBC__) |
689 | # undef HAVE_NFTW | |
690 | # undef HAVE_FTW | |
691 | #endif | |
692 | ||
45e878bb | 693 | #ifndef HAVE_NFTW |
173fc515 | 694 | # define FTW_PHYS 1 |
45e878bb NB |
695 | # ifndef HAVE_FTW |
696 | struct FTW {}; | |
173fc515 NB |
697 | # endif |
698 | #endif | |
699 | ||
45e878bb NB |
700 | #ifdef HAVE_FTW |
701 | # include <ftw.h> | |
702 | #endif | |
703 | ||
173fc515 NB |
704 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); |
705 | ||
f9ce90ba | 706 | |
64c4757e | 707 | extern int Manage_ro(char *devname, int fd, int readonly); |
91f068bf | 708 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); |
dd0781e5 | 709 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); |
b5e64645 | 710 | extern int Manage_reconfig(char *devname, int fd, int layout); |
64c4757e | 711 | extern int Manage_subdevs(char *devname, int fd, |
dab6685f | 712 | mddev_dev_t devlist, int verbose); |
1f48664b | 713 | extern int autodetect(void); |
e5329c37 | 714 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
8fac0577 | 715 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force); |
06b0d786 | 716 | extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file, |
e86c9dd6 NB |
717 | long long size, |
718 | int level, int layout, int chunksize, int raid_disks); | |
06b0d786 NB |
719 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
720 | int *fdlist, int cnt, char *backup_file); | |
64c4757e NB |
721 | |
722 | ||
7f91af49 | 723 | extern int Assemble(struct supertype *st, char *mddev, |
52826846 | 724 | mddev_ident_t ident, |
06b0d786 | 725 | mddev_dev_t devlist, char *backup_file, |
64c4757e | 726 | int readonly, int runstop, |
0ac91628 | 727 | char *update, char *homehost, int require_homehost, |
64c4757e NB |
728 | int verbose, int force); |
729 | ||
7f91af49 N |
730 | extern int Build(char *mddev, int chunk, int level, int layout, |
731 | int raiddisks, mddev_dev_t devlist, int assume_clean, | |
732 | char *bitmap_file, int bitmap_chunk, int write_behind, | |
733 | int delay, int verbose, int autof); | |
64c4757e NB |
734 | |
735 | ||
7f91af49 | 736 | extern int Create(struct supertype *st, char *mddev, |
5dd497ee | 737 | int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, |
3d3dd91e | 738 | char *name, char *homehost, int *uuid, |
cd29a5c8 | 739 | int subdevs, mddev_dev_t devlist, |
47d79ef8 | 740 | int runstop, int verbose, int force, int assume_clean, |
7f91af49 | 741 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int autof); |
64c4757e | 742 | |
54bad364 | 743 | extern int Detail(char *dev, int brief, int export, int test, char *homehost); |
4cce4069 | 744 | extern int Detail_Platform(struct superswitch *ss, int scan, int verbose); |
e0d19036 | 745 | extern int Query(char *dev); |
0d726f17 KS |
746 | extern int Examine(mddev_dev_t devlist, int brief, int export, int scan, |
747 | int SparcAdjust, struct supertype *forcest, char *homehost); | |
cd29a5c8 | 748 | extern int Monitor(mddev_dev_t devlist, |
e0d19036 | 749 | char *mailaddr, char *alert_cmd, |
aa88f531 | 750 | int period, int daemonise, int scan, int oneshot, |
8aec876d | 751 | int dosyslog, int test, char *pidfile); |
64c4757e | 752 | |
111d01fc | 753 | extern int Kill(char *dev, int force, int quiet, int noexcl); |
b90c0e9a | 754 | extern int Wait(char *dev); |
27dec8fa | 755 | extern int WaitClean(char *dev, int verbose); |
9a9dab36 | 756 | |
8382f19b | 757 | extern int Incremental(char *devname, int verbose, int runstop, |
0ac91628 N |
758 | struct supertype *st, char *homehost, int require_homehost, |
759 | int autof); | |
598f0d58 | 760 | extern int Incremental_container(struct supertype *st, char *devname, |
215bb3f7 N |
761 | int verbose, int runstop, int autof, |
762 | int trustworthy); | |
8382f19b NB |
763 | extern void RebuildMap(void); |
764 | extern int IncrementalScan(int verbose); | |
765 | ||
c82f047c NB |
766 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
767 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 768 | unsigned long write_behind, |
dcec9ee5 NB |
769 | unsigned long long array_size, |
770 | int major); | |
55935d51 | 771 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
bf4fb153 | 772 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
2a528478 | 773 | extern unsigned long bitmap_sectors(struct bitmap_super_s *bsb); |
c82f047c | 774 | |
64c4757e | 775 | extern int md_get_version(int fd); |
e0d19036 | 776 | extern int get_linux_version(void); |
64c4757e | 777 | extern int parse_uuid(char *str, int uuid[4]); |
682c7051 NB |
778 | extern int check_ext2(int fd, char *name); |
779 | extern int check_reiser(int fd, char *name); | |
780 | extern int check_raid(int fd, char *name); | |
64c4757e | 781 | |
dd0781e5 | 782 | extern int get_mdp_major(void); |
8b0dabea | 783 | extern int dev_open(char *dev, int flags); |
e8a70c89 | 784 | extern int open_dev(int devnum); |
a931db9e | 785 | extern int open_dev_excl(int devnum); |
8d80900b | 786 | extern int is_standard(char *dev, int *nump); |
9008ed1c | 787 | extern int same_dev(char *one, char *two); |
dd0781e5 | 788 | |
f1ae21c4 | 789 | extern int parse_auto(char *str, char *msg, int config); |
8aec876d NB |
790 | extern mddev_ident_t conf_get_ident(char *dev); |
791 | extern mddev_dev_t conf_get_devs(void); | |
8382f19b | 792 | extern int conf_test_dev(char *devname); |
31015d57 | 793 | extern int conf_test_metadata(const char *version); |
8aec876d NB |
794 | extern struct createinfo *conf_get_create_info(void); |
795 | extern void set_conffile(char *file); | |
796 | extern char *conf_get_mailaddr(void); | |
797 | extern char *conf_get_mailfrom(void); | |
798 | extern char *conf_get_program(void); | |
0ac91628 | 799 | extern char *conf_get_homehost(int *require_homehostp); |
e0d19036 | 800 | extern char *conf_line(FILE *file); |
98c6faba | 801 | extern char *conf_word(FILE *file, int allow_key); |
0ac91628 N |
802 | extern int conf_name_is_free(char *name); |
803 | extern int devname_matches(char *name, char *match); | |
804 | ||
e0d19036 NB |
805 | extern void free_line(char *line); |
806 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 807 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
36ba7d48 | 808 | extern const int uuid_match_any[4]; |
f277ce36 | 809 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
350f29f9 | 810 | extern void copy_uuid(void *a, int b[4], int swapuuid); |
d7288ddc | 811 | extern char *fname_from_uuid(struct supertype *st, |
ff54de6e | 812 | struct mdinfo *info, char *buf, char sep); |
4b1ac34b | 813 | extern unsigned long calc_csum(void *super, int bytes); |
583315d9 | 814 | extern int enough(int level, int raid_disks, int layout, int clean, |
265e0f17 | 815 | char *avail, int avail_disks); |
e0d19036 | 816 | extern int ask(char *mesg); |
8fac0577 | 817 | extern unsigned long long get_component_size(int fd); |
0430ed48 | 818 | extern void remove_partitions(int fd); |
5f8097be NB |
819 | extern unsigned long long calc_array_size(int level, int raid_disks, int layout, |
820 | int chunksize, unsigned long long devsize); | |
edd8d13c NB |
821 | extern int flush_metadata_updates(struct supertype *st); |
822 | extern void append_metadata_update(struct supertype *st, void *buf, int len); | |
6234c63c DW |
823 | extern int assemble_container_content(struct supertype *st, int mdfd, |
824 | struct mdinfo *content, int runstop, | |
825 | char *chosen_name, int verbose); | |
e0d19036 | 826 | |
7801ac20 N |
827 | extern int add_disk(int mdfd, struct supertype *st, |
828 | struct mdinfo *sra, struct mdinfo *info); | |
f35f2525 | 829 | extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info); |
cd29a5c8 | 830 | |
56eb10c0 | 831 | extern char *human_size(long long bytes); |
e4965ef8 N |
832 | extern char *human_size_brief(long long bytes); |
833 | extern void print_r10_layout(int layout); | |
e0d19036 | 834 | |
63152c1b NB |
835 | #define NoMdDev (1<<23) |
836 | extern int find_free_devnum(int use_partitions); | |
837 | ||
e0d19036 NB |
838 | extern void put_md_name(char *name); |
839 | extern char *get_md_name(int dev); | |
840 | ||
c913b90e | 841 | extern char DefaultConfFile[]; |
b5e64645 | 842 | |
69207ff6 N |
843 | extern int create_mddev(char *dev, char *name, int autof, int trustworthy, |
844 | char *chosen); | |
845 | /* values for 'trustworthy' */ | |
846 | #define LOCAL 1 | |
847 | #define FOREIGN 2 | |
848 | #define METADATA 3 | |
6be1d39d | 849 | extern int open_mddev(char *dev, int report_errors); |
a322f70c | 850 | extern int open_container(int fd); |
b5e64645 | 851 | |
a931db9e NB |
852 | extern int mdmon_running(int devnum); |
853 | extern int signal_mdmon(int devnum); | |
40ebbb9c | 854 | extern int check_env(char *name); |
8850ee3e | 855 | extern int start_mdmon(int devnum); |
a931db9e | 856 | |
2f6079dc | 857 | extern char *devnum2devname(int num); |
77472ff8 | 858 | extern int devname2devnum(char *name); |
c94709e8 | 859 | extern int stat2devnum(struct stat *st); |
2f6079dc | 860 | extern int fd2devnum(int fd); |
b5e64645 | 861 | |
a931db9e NB |
862 | static inline int dev2major(int d) |
863 | { | |
864 | if (d >= 0) | |
865 | return MD_MAJOR; | |
866 | else | |
867 | return get_mdp_major(); | |
868 | } | |
869 | ||
870 | static inline int dev2minor(int d) | |
871 | { | |
872 | if (d >= 0) | |
873 | return d; | |
874 | return (-1-d) << MdpMinorShift; | |
875 | } | |
876 | ||
6416d527 NB |
877 | static inline int ROUND_UP(int a, int base) |
878 | { | |
879 | return ((a+base-1)/base)*base; | |
880 | } | |
881 | ||
3c558363 N |
882 | static inline int is_subarray(char *vers) |
883 | { | |
e9dd1598 N |
884 | /* The version string for a 'subarray' (an array in a container) |
885 | * is | |
886 | * /containername/componentname for normal read-write arrays | |
887 | * -containername/componentname for read-only arrays. | |
888 | * containername is e.g. md0, md_d1 | |
889 | * componentname is dependant on the metadata. e.g. '1' 'S1' ... | |
890 | */ | |
891 | return (*vers == '/' || *vers == '-'); | |
3c558363 N |
892 | } |
893 | ||
2a24d7b6 DW |
894 | #ifdef DEBUG |
895 | #define dprintf(fmt, arg...) \ | |
896 | fprintf(stderr, fmt, ##arg) | |
897 | #else | |
898 | #define dprintf(fmt, arg...) \ | |
899 | ({ if (0) fprintf(stderr, fmt, ##arg); 0; }) | |
900 | #endif | |
1a0ee0ba DK |
901 | #include <assert.h> |
902 | #include <stdarg.h> | |
903 | static inline int xasprintf(char **strp, const char *fmt, ...) { | |
904 | va_list ap; | |
905 | int ret; | |
906 | va_start(ap, fmt); | |
089485cb | 907 | ret = vasprintf(strp, fmt, ap); |
1a0ee0ba DK |
908 | va_end(ap); |
909 | assert(ret >= 0); | |
910 | return ret; | |
911 | } | |
2a24d7b6 | 912 | |
b5e64645 NB |
913 | #define LEVEL_MULTIPATH (-4) |
914 | #define LEVEL_LINEAR (-1) | |
915 | #define LEVEL_FAULTY (-5) | |
916 | ||
17f25ca6 NB |
917 | /* kernel module doesn't know about these */ |
918 | #define LEVEL_CONTAINER (-100) | |
a322f70c | 919 | #define LEVEL_UNSUPPORTED (-200) |
17f25ca6 | 920 | |
b5e64645 NB |
921 | |
922 | /* faulty stuff */ | |
923 | ||
924 | #define WriteTransient 0 | |
925 | #define ReadTransient 1 | |
926 | #define WritePersistent 2 | |
927 | #define ReadPersistent 3 | |
928 | #define WriteAll 4 /* doesn't go to device */ | |
929 | #define ReadFixable 5 | |
930 | #define Modes 6 | |
931 | ||
932 | #define ClearErrors 31 | |
933 | #define ClearFaults 30 | |
934 | ||
935 | #define AllPersist 100 /* internal use only */ | |
936 | #define NoPersist 101 | |
937 | ||
938 | #define ModeMask 0x1f | |
939 | #define ModeShift 5 | |
fe6729fa NB |
940 | |
941 | ||
942 | #ifdef __TINYC__ | |
943 | #undef minor | |
944 | #undef major | |
945 | #undef makedev | |
946 | #define minor(x) ((x)&0xff) | |
947 | #define major(x) (((x)>>8)&0xff) | |
948 | #define makedev(M,m) (((M)<<8) | (m)) | |
949 | #endif | |
950 | ||
b640a252 | 951 | /* for raid4/5/6 */ |
e86c9dd6 NB |
952 | #define ALGORITHM_LEFT_ASYMMETRIC 0 |
953 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
954 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
955 | #define ALGORITHM_RIGHT_SYMMETRIC 3 | |
b640a252 N |
956 | |
957 | /* Define non-rotating (raid4) algorithms. These allow | |
958 | * conversion of raid4 to raid5. | |
959 | */ | |
960 | #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */ | |
961 | #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */ | |
962 | ||
963 | /* DDF RAID6 layouts differ from md/raid6 layouts in two ways. | |
964 | * Firstly, the exact positioning of the parity block is slightly | |
965 | * different between the 'LEFT_*' modes of md and the "_N_*" modes | |
966 | * of DDF. | |
967 | * Secondly, or order of datablocks over which the Q syndrome is computed | |
968 | * is different. | |
969 | * Consequently we have different layouts for DDF/raid6 than md/raid6. | |
970 | * These layouts are from the DDFv1.2 spec. | |
971 | * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but | |
972 | * leaves RLQ=3 as 'Vendor Specific' | |
973 | */ | |
974 | ||
975 | #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */ | |
976 | #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */ | |
977 | #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */ | |
978 | ||
979 | ||
980 | /* For every RAID5 algorithm we define a RAID6 algorithm | |
981 | * with exactly the same layout for data and parity, and | |
982 | * with the Q block always on the last device (N-1). | |
983 | * This allows trivial conversion from RAID5 to RAID6 | |
984 | */ | |
985 | #define ALGORITHM_LEFT_ASYMMETRIC_6 16 | |
986 | #define ALGORITHM_RIGHT_ASYMMETRIC_6 17 | |
987 | #define ALGORITHM_LEFT_SYMMETRIC_6 18 | |
988 | #define ALGORITHM_RIGHT_SYMMETRIC_6 19 | |
989 | #define ALGORITHM_PARITY_0_6 20 | |
990 | #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N | |
991 |