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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 | */ | |
353632d9 NB |
149 | int reshape_active; |
150 | unsigned long long reshape_progress; | |
0fd5c350 | 151 | unsigned long long resync_start; |
a67dd8cc | 152 | unsigned long safe_mode_delay; /* ms delay to mark clean */ |
353632d9 | 153 | int new_level, delta_disks, new_layout, new_chunk; |
06c7f68e | 154 | int errors; |
7e0f6979 NB |
155 | int cache_size; /* size of raid456 stripe cache*/ |
156 | int mismatch_cnt; | |
157 | char text_version[50]; | |
dd15dc4a NB |
158 | |
159 | int container_member; /* for assembling external-metatdata arrays | |
160 | * This is to be used internally by metadata | |
161 | * handler only */ | |
06c7f68e NB |
162 | |
163 | char sys_name[20]; | |
7e0f6979 | 164 | struct mdinfo *devs; |
06c7f68e | 165 | struct mdinfo *next; |
549e9569 NB |
166 | |
167 | /* Device info for mdmon: */ | |
168 | int state_fd; | |
8d45d196 DW |
169 | #define DS_FAULTY 1 |
170 | #define DS_INSYNC 2 | |
171 | #define DS_WRITE_MOSTLY 4 | |
172 | #define DS_SPARE 8 | |
173 | #define DS_BLOCKED 16 | |
174 | #define DS_REMOVE 1024 | |
92967543 | 175 | #define DS_UNBLOCK 2048 |
549e9569 NB |
176 | int prev_state, curr_state, next_state; |
177 | ||
4b1ac34b NB |
178 | }; |
179 | ||
5bbb4842 NB |
180 | struct createinfo { |
181 | int uid; | |
182 | int gid; | |
183 | int autof; | |
184 | int mode; | |
38098016 | 185 | int symlinks; |
058574b1 | 186 | struct supertype *supertype; |
5bbb4842 NB |
187 | }; |
188 | ||
9a9dab36 | 189 | #define Name "mdadm" |
682c7051 | 190 | |
e0d19036 NB |
191 | enum mode { |
192 | ASSEMBLE=1, | |
193 | BUILD, | |
194 | CREATE, | |
195 | MANAGE, | |
196 | MISC, | |
197 | MONITOR, | |
dd0781e5 | 198 | GROW, |
8382f19b | 199 | INCREMENTAL, |
1f48664b | 200 | AUTODETECT, |
e0d19036 NB |
201 | }; |
202 | ||
64c4757e | 203 | extern char short_options[]; |
024768c4 | 204 | extern char short_bitmap_options[]; |
c06487ce | 205 | extern char short_bitmap_auto_options[]; |
64c4757e | 206 | extern struct option long_options[]; |
56eedc1a | 207 | extern char Version[], Usage[], Help[], OptionHelp[], |
dd0781e5 | 208 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
8382f19b | 209 | Help_incr[], |
e0d19036 | 210 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 211 | |
997aed5d NB |
212 | /* for option that don't have short equivilents, we assign arbitrary |
213 | * small numbers. '1' means an undecorated option, so we start at '2'. | |
214 | */ | |
215 | enum special_options { | |
216 | AssumeClean = 2, | |
217 | BitmapChunk, | |
218 | WriteBehind, | |
219 | ReAdd, | |
220 | NoDegraded, | |
221 | Sparc22, | |
222 | BackupFile, | |
223 | HomeHost, | |
589395d6 | 224 | AutoHomeHost, |
38098016 | 225 | Symlinks, |
1f48664b | 226 | AutoDetect, |
1770662b | 227 | Waitclean, |
997aed5d NB |
228 | }; |
229 | ||
64c4757e | 230 | /* structures read from config file */ |
52826846 NB |
231 | /* List of mddevice names and identifiers |
232 | * Identifiers can be: | |
233 | * uuid=128-hex-uuid | |
234 | * super-minor=decimal-minor-number-from-superblock | |
235 | * devices=comma,separated,list,of,device,names,with,wildcards | |
236 | * | |
237 | * If multiple fields are present, the intersection of all matching | |
238 | * devices is considered | |
239 | */ | |
98c6faba | 240 | #define UnSet (0xfffe) |
52826846 | 241 | typedef struct mddev_ident_s { |
dd0781e5 | 242 | char *devname; |
aba69144 | 243 | |
dd0781e5 | 244 | int uuid_set; |
3fa06e9d | 245 | int uuid[4]; |
947fd4dd | 246 | char name[33]; |
52826846 | 247 | |
98c6faba | 248 | unsigned int super_minor; |
52826846 | 249 | |
dd0781e5 | 250 | char *devices; /* comma separated list of device |
52826846 NB |
251 | * names with wild cards |
252 | */ | |
dd0781e5 | 253 | int level; |
98c6faba NB |
254 | unsigned int raid_disks; |
255 | unsigned int spare_disks; | |
82d9eba6 | 256 | struct supertype *st; |
dd0781e5 NB |
257 | int autof; /* 1 for normal, 2 for partitioned */ |
258 | char *spare_group; | |
7ef02d01 | 259 | char *bitmap_file; |
c82f047c | 260 | int bitmap_fd; |
dd0781e5 | 261 | |
dbb44303 N |
262 | char *container; /* /dev/whatever name of container. You |
263 | * would expect this to be the 'devname' | |
264 | * of some other entry. | |
265 | */ | |
266 | char *member; /* subarray within a container */ | |
267 | ||
52826846 NB |
268 | struct mddev_ident_s *next; |
269 | } *mddev_ident_t; | |
64c4757e NB |
270 | |
271 | /* List of device names - wildcards expanded */ | |
272 | typedef struct mddev_dev_s { | |
273 | char *devname; | |
cd29a5c8 NB |
274 | char disposition; /* 'a' for add, 'r' for remove, 'f' for fail. |
275 | * Not set for names read from .config | |
276 | */ | |
dfd4d8ee | 277 | char writemostly; |
fe80f49b | 278 | char re_add; |
811e6cbe | 279 | char used; /* set when used */ |
64c4757e NB |
280 | struct mddev_dev_s *next; |
281 | } *mddev_dev_t; | |
282 | ||
682c7051 NB |
283 | typedef struct mapping { |
284 | char *name; | |
285 | int num; | |
286 | } mapping_t; | |
287 | ||
e0d19036 NB |
288 | |
289 | struct mdstat_ent { | |
290 | char *dev; | |
291 | int devnum; | |
292 | int active; | |
293 | char *level; | |
294 | char *pattern; /* U or up, _ for down */ | |
295 | int percent; /* -1 if no resync */ | |
e5329c37 | 296 | int resync; /* 1 if resync, 0 if recovery */ |
549e9569 NB |
297 | int devcnt; |
298 | int raid_disks; | |
299 | int chunk_size; | |
300 | char * metadata_version; | |
e0d19036 NB |
301 | struct mdstat_ent *next; |
302 | }; | |
303 | ||
22a88995 | 304 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
e0d19036 | 305 | extern void free_mdstat(struct mdstat_ent *ms); |
dd0781e5 | 306 | extern void mdstat_wait(int seconds); |
1ed3f387 | 307 | extern void mdstat_wait_fd(int fd, const sigset_t *sigmask); |
8382f19b NB |
308 | extern int mddev_busy(int devnum); |
309 | ||
310 | struct map_ent { | |
311 | struct map_ent *next; | |
312 | int devnum; | |
1522c538 | 313 | char metadata[20]; |
8382f19b NB |
314 | int uuid[4]; |
315 | char *path; | |
316 | }; | |
1522c538 | 317 | extern int map_update(struct map_ent **mpp, int devnum, char *metadata, |
8382f19b NB |
318 | int uuid[4], char *path); |
319 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); | |
320 | extern void map_read(struct map_ent **melp); | |
321 | extern int map_write(struct map_ent *mel); | |
322 | extern void map_delete(struct map_ent **mapp, int devnum); | |
323 | extern void map_free(struct map_ent *map); | |
324 | extern void map_add(struct map_ent **melp, | |
1522c538 | 325 | int devnum, char *metadata, int uuid[4], char *path); |
e0d19036 | 326 | |
e86c9dd6 NB |
327 | /* various details can be requested */ |
328 | #define GET_LEVEL 1 | |
329 | #define GET_LAYOUT 2 | |
330 | #define GET_COMPONENT 4 | |
331 | #define GET_CHUNK 8 | |
758d3a8e | 332 | #define GET_CACHE 16 |
37dfc3d6 | 333 | #define GET_MISMATCH 32 |
8382f19b | 334 | #define GET_VERSION 64 |
549e9569 | 335 | #define GET_DISKS 128 |
f1d26766 | 336 | #define GET_DEGRADED 256 |
1770662b | 337 | #define GET_SAFEMODE 512 |
e86c9dd6 NB |
338 | |
339 | #define GET_DEVS 1024 /* gets role, major, minor */ | |
340 | #define GET_OFFSET 2048 | |
341 | #define GET_SIZE 4096 | |
342 | #define GET_STATE 8192 | |
343 | #define GET_ERROR 16384 | |
344 | ||
345 | /* If fd >= 0, get the array it is open on, | |
346 | * else use devnum. >=0 -> major9. <0..... | |
347 | */ | |
549e9569 | 348 | extern int sysfs_open(int devnum, char *devname, char *attr); |
f35f2525 | 349 | extern void sysfs_init(struct mdinfo *mdi, int fd, int devnum); |
7e0f6979 NB |
350 | extern void sysfs_free(struct mdinfo *sra); |
351 | extern struct mdinfo *sysfs_read(int fd, int devnum, unsigned long options); | |
1770662b DW |
352 | extern int sysfs_attr_match(const char *attr, const char *str); |
353 | extern int sysfs_match_word(const char *word, char **list); | |
7e0f6979 | 354 | extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 355 | char *name, char *val); |
7e0f6979 | 356 | extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 357 | char *name, unsigned long long val); |
7e0f6979 | 358 | extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 359 | char *name, unsigned long long *val); |
8ed3e5e1 | 360 | extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms); |
f35f2525 | 361 | extern int sysfs_set_array(struct mdinfo *info, int vers); |
2318b9f0 | 362 | extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd); |
f1665f72 | 363 | extern int sysfs_disk_to_scsi_id(int fd, __u32 *id); |
f94d52f4 | 364 | extern int sysfs_unique_holder(int devnum, long rdev); |
c69b251b | 365 | extern int load_sys(char *path, char *buf); |
e86c9dd6 NB |
366 | |
367 | ||
368 | extern int save_stripes(int *source, unsigned long long *offsets, | |
369 | int raid_disks, int chunk_size, int level, int layout, | |
370 | int nwrites, int *dest, | |
371 | unsigned long long start, unsigned long long length); | |
353632d9 NB |
372 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
373 | int raid_disks, int chunk_size, int level, int layout, | |
374 | int source, unsigned long long read_offset, | |
375 | unsigned long long start, unsigned long long length); | |
e86c9dd6 | 376 | |
52826846 NB |
377 | #ifndef Sendmail |
378 | #define Sendmail "/usr/lib/sendmail -t" | |
379 | #endif | |
380 | ||
773135f5 NB |
381 | #define SYSLOG_FACILITY LOG_DAEMON |
382 | ||
682c7051 NB |
383 | extern char *map_num(mapping_t *map, int num); |
384 | extern int map_name(mapping_t *map, char *name); | |
b5e64645 | 385 | extern mapping_t r5layout[], pers[], modes[], faultylayout[]; |
682c7051 | 386 | |
16c6fa80 | 387 | extern char *map_dev(int major, int minor, int create); |
64c4757e | 388 | |
549e9569 | 389 | struct active_array; |
2e735d19 | 390 | struct metadata_update; |
64c4757e | 391 | |
6adfd3af NB |
392 | /* A superswitch provides entry point the a metadata handler. |
393 | * | |
394 | * The super_switch primarily operates on some "metadata" that | |
395 | * is accessed via the 'supertype'. | |
396 | * This metadata has one of three possible sources. | |
397 | * 1/ It is read from a single device. In this case it may not completely | |
398 | * describe the array or arrays as some information might be on other | |
399 | * devices. | |
400 | * 2/ It is read from all devices in a container. In this case all | |
401 | * information is present. | |
402 | * 3/ It is created by ->init_super / ->add_to_super. In this case it will | |
403 | * be complete once enough ->add_to_super calls have completed. | |
404 | * | |
405 | * When creating an array inside a container, the metadata will be | |
406 | * formed by a combination of 2 and 3. The metadata or the array is read, | |
407 | * then new information is added. | |
408 | * | |
409 | * The metadata must sometimes have a concept of a 'current' array | |
410 | * and a 'current' device. | |
411 | * The 'current' array is set by init_super to be the newly created array, | |
412 | * or is set by super_by_fd when it finds it is looking at an array inside | |
413 | * a container. | |
414 | * | |
415 | * The 'current' device is either the device that the metadata was read from | |
416 | * in case 1, or the last device added by add_to_super in case 3. | |
417 | * Case 2 does not identify a 'current' device. | |
418 | */ | |
f9ce90ba | 419 | extern struct superswitch { |
6adfd3af NB |
420 | |
421 | /* Used to report details of metadata read from a component | |
422 | * device. ->load_super has been called. | |
423 | */ | |
3da92f27 NB |
424 | void (*examine_super)(struct supertype *st, char *homehost); |
425 | void (*brief_examine_super)(struct supertype *st); | |
0d726f17 | 426 | void (*export_examine_super)(struct supertype *st); |
6adfd3af NB |
427 | |
428 | /* Used to report details of an active array. | |
429 | * ->load_super was possibly given a 'component' string. | |
430 | */ | |
3da92f27 | 431 | void (*detail_super)(struct supertype *st, char *homehost); |
3da92f27 | 432 | void (*brief_detail_super)(struct supertype *st); |
0d726f17 | 433 | void (*export_detail_super)(struct supertype *st); |
6adfd3af NB |
434 | |
435 | /* Used: | |
436 | * to get uuid to storing in bitmap metadata | |
437 | * and 'reshape' backup-data metadata | |
438 | * To see if a device is being re-added to an array it was part of. | |
439 | */ | |
3da92f27 | 440 | void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
6adfd3af NB |
441 | |
442 | /* Extra generic details from metadata. This could be details about | |
443 | * the container, or about an individual array within the container. | |
444 | * The determination is made either by: | |
445 | * load_super being given a 'component' string. | |
446 | * validate_geometry determining what to create. | |
d2ca6449 NB |
447 | * The info includes both array information and device information. |
448 | * The particular device should be: | |
449 | * The last device added by add_to_super | |
450 | * The device the metadata was loaded from by load_super | |
6adfd3af | 451 | */ |
3da92f27 | 452 | void (*getinfo_super)(struct supertype *st, struct mdinfo *info); |
6adfd3af NB |
453 | |
454 | /* Check if the given metadata is flagged as belonging to "this" | |
9362c1c8 | 455 | * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost" |
6adfd3af | 456 | */ |
3da92f27 | 457 | int (*match_home)(struct supertype *st, char *homehost); |
6adfd3af NB |
458 | |
459 | /* Make one of several generic modifications to metadata | |
460 | * prior to assembly (or other times). | |
461 | * sparc2.2 - first bug in early 0.90 metadata | |
462 | * super-minor - change name of 0.90 metadata | |
463 | * summaries - 'correct' any redundant data | |
464 | * resync - mark array as dirty to trigger a resync. | |
465 | * uuid - set new uuid - only 0.90 or 1.x | |
466 | * name - change the name of the array (where supported) | |
467 | * homehost - change which host this array is tied to. | |
468 | * devicesize - If metadata is at start of device, change recorded | |
469 | * device size to match actual device size | |
470 | * byteorder - swap bytes for 0.90 metadata | |
471 | * | |
472 | * force-one - mark that device as uptodate, not old or failed. | |
473 | * force-array - mark array as clean if it would not otherwise | |
474 | * assemble | |
475 | * assemble - not sure how this is different from force-one... | |
476 | * linear-grow-new - add a new device to a linear array, but don't | |
477 | * change the size: so superblock still matches | |
478 | * linear-grow-update - now change the size of the array. | |
479 | */ | |
68c7d6d7 | 480 | int (*update_super)(struct supertype *st, struct mdinfo *info, |
3da92f27 | 481 | char *update, |
e5eac01f NB |
482 | char *devname, int verbose, |
483 | int uuid_set, char *homehost); | |
6adfd3af NB |
484 | |
485 | /* Create new metadata for new array as described. This could | |
486 | * be a new container, or an array in a pre-existing container. | |
487 | * Also used to zero metadata prior to writing it to invalidate old | |
488 | * metadata. | |
489 | */ | |
3da92f27 NB |
490 | int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
491 | unsigned long long size, char *name, | |
492 | char *homehost, int *uuid); | |
6adfd3af NB |
493 | |
494 | /* update the metadata to include new device, either at create or | |
495 | * when hot-adding a spare. | |
496 | */ | |
111d01fc NB |
497 | void (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
498 | int fd, char *devname); | |
6adfd3af NB |
499 | |
500 | /* Write metadata to one device when fixing problems or adding | |
501 | * a new device. | |
502 | */ | |
3da92f27 | 503 | int (*store_super)(struct supertype *st, int fd); |
6adfd3af NB |
504 | |
505 | /* Write all metadata for this array. | |
506 | */ | |
111d01fc | 507 | int (*write_init_super)(struct supertype *st); |
64557c33 | 508 | int (*compare_super)(struct supertype *st, struct supertype *tst); |
3da92f27 | 509 | int (*load_super)(struct supertype *st, int fd, char *devname); |
82d9eba6 | 510 | struct supertype * (*match_metadata_desc)(char *arg); |
1bf4e2d9 | 511 | __u64 (*avail_size)(struct supertype *st, __u64 size); |
3da92f27 | 512 | int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
199171a2 | 513 | int delay, int write_behind, |
f9c25f1d | 514 | unsigned long long size, int may_change, int major); |
3da92f27 NB |
515 | void (*locate_bitmap)(struct supertype *st, int fd); |
516 | int (*write_bitmap)(struct supertype *st, int fd); | |
517 | void (*free_super)(struct supertype *st); | |
78e44928 NB |
518 | |
519 | /* validate_geometry is called with an st returned by | |
520 | * match_metadata_desc. | |
521 | * It should check that the geometry described in compatible with | |
522 | * the metadata type. It will be called repeatedly as devices | |
523 | * added to validate changing size and new devices. If there are | |
524 | * inter-device dependencies, it should record sufficient details | |
525 | * so these can be validated. | |
526 | */ | |
17f25ca6 NB |
527 | int (*validate_geometry)(struct supertype *st, int level, int layout, |
528 | int raiddisks, | |
529 | int chunk, unsigned long long size, | |
2c514b71 NB |
530 | char *subdev, unsigned long long *freesize, |
531 | int verbose); | |
598f0d58 NB |
532 | |
533 | struct mdinfo *(*container_content)(struct supertype *st); | |
534 | ||
549e9569 | 535 | /* for mdmon */ |
cba0191b NB |
536 | int (*open_new)(struct supertype *c, struct active_array *a, |
537 | char *inst); | |
ed9d66aa NB |
538 | |
539 | /* Tell the metadata handler the current state of the array. | |
540 | * This covers whether it is known to be consistent (no pending writes) | |
01f157d7 | 541 | * and how far along a resync is known to have progressed |
ed9d66aa NB |
542 | * (in a->resync_start). |
543 | * resync status is really irrelevant if the array is not consistent, | |
544 | * but some metadata (DDF!) have a place to record the distinction. | |
01f157d7 N |
545 | * If 'consistent' is '2', then the array can mark it dirty if a |
546 | * resync/recovery/whatever is required, or leave it clean if not. | |
547 | * Return value is 0 dirty (not consistent) and 1 if clean. | |
548 | * it is only really important if consistent is passed in as '2'. | |
4e5528c6 | 549 | */ |
01f157d7 | 550 | int (*set_array_state)(struct active_array *a, int consistent); |
7a7cc504 NB |
551 | |
552 | /* When the state of a device might have changed, we call set_disk to | |
553 | * tell the metadata what the current state is. | |
554 | * Typically this happens on spare->in_sync and (spare|in_sync)->faulty | |
555 | * transitions. | |
556 | * set_disk might be called when the state of the particular disk has | |
557 | * not in fact changed. | |
558 | */ | |
8d45d196 | 559 | void (*set_disk)(struct active_array *a, int n, int state); |
2e735d19 NB |
560 | void (*sync_metadata)(struct supertype *st); |
561 | void (*process_update)(struct supertype *st, | |
562 | struct metadata_update *update); | |
edd8d13c NB |
563 | void (*prepare_update)(struct supertype *st, |
564 | struct metadata_update *update); | |
549e9569 | 565 | |
6c3fb95c NB |
566 | /* activate_spare will check if the array is degraded and, if it |
567 | * is, try to find some spare space in the container. | |
568 | * On success, it add appropriate updates (For process_update) to | |
569 | * to the 'updates' list and returns a list of 'mdinfo' identifying | |
570 | * the device, or devices as there might be multiple missing | |
571 | * devices and multiple spares available. | |
572 | */ | |
573 | struct mdinfo *(*activate_spare)(struct active_array *a, | |
574 | struct metadata_update **updates); | |
549e9569 | 575 | |
f277ce36 | 576 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
d03373f1 | 577 | int external; |
0063ecba | 578 | } super0, super1, super_ddf, *superlist[]; |
82d9eba6 | 579 | |
0063ecba | 580 | extern struct superswitch super_imsm; |
cdddbdbc | 581 | |
edd8d13c NB |
582 | struct metadata_update { |
583 | int len; | |
584 | char *buf; | |
585 | void *space; /* allocated space that monitor will use */ | |
586 | struct metadata_update *next; | |
587 | }; | |
588 | ||
6adfd3af NB |
589 | /* A supertype holds a particular collection of metadata. |
590 | * It identifies the metadata type by the superswitch, and the particular | |
591 | * sub-version of that metadata type. | |
592 | * metadata read in or created is stored in 'sb' and 'info'. | |
593 | * There are also fields used by mdmon to track containers. | |
594 | * | |
352452c3 N |
595 | * A supertype may refer to: |
596 | * Just an array, possibly in a container | |
597 | * A container, not identifying any particular array | |
598 | * Info read from just one device, not yet fully describing the array/container. | |
599 | * | |
600 | * | |
6adfd3af NB |
601 | * A supertype is created by: |
602 | * super_by_fd | |
603 | * guess_super | |
604 | * dup_super | |
605 | */ | |
82d9eba6 NB |
606 | struct supertype { |
607 | struct superswitch *ss; | |
608 | int minor_version; | |
ea329559 | 609 | int max_devs; |
2f6079dc | 610 | int container_dev; /* devnum of container */ |
f7e7067b | 611 | char subarray[32]; /* name of array inside container */ |
64557c33 | 612 | void *sb; |
111d01fc | 613 | void *info; |
352452c3 N |
614 | int loaded_container; /* Set if load_super found a container, |
615 | * not just one device */ | |
549e9569 | 616 | |
edd8d13c NB |
617 | struct metadata_update *updates; |
618 | struct metadata_update **update_tail; | |
619 | ||
549e9569 NB |
620 | /* extra stuff used by mdmon */ |
621 | struct active_array *arrays; | |
549e9569 | 622 | int sock; /* listen to external programs */ |
549e9569 NB |
623 | int devnum; |
624 | char *devname; /* e.g. md0. This appears in metadata_verison: | |
625 | * external:/md0/12 | |
626 | */ | |
627 | int devcnt; | |
e0d6609f | 628 | char *device_name; /* e.g. /dev/md/whatever */ |
549e9569 NB |
629 | |
630 | struct mdinfo *devs; | |
631 | ||
82d9eba6 | 632 | }; |
f9ce90ba | 633 | |
1686dc25 | 634 | extern struct supertype *super_by_fd(int fd); |
82d9eba6 | 635 | extern struct supertype *guess_super(int fd); |
3da92f27 | 636 | extern struct supertype *dup_super(struct supertype *st); |
beae1dfe | 637 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
8382f19b NB |
638 | extern void get_one_disk(int mdfd, mdu_array_info_t *ainf, |
639 | mdu_disk_info_t *disk); | |
f9ce90ba | 640 | |
838acbc2 NB |
641 | #if __GNUC__ < 3 |
642 | struct stat64; | |
643 | #endif | |
644 | ||
45e878bb NB |
645 | #define HAVE_NFTW we assume |
646 | #define HAVE_FTW | |
647 | ||
173fc515 | 648 | #ifdef UCLIBC |
45e878bb NB |
649 | # include <features.h> |
650 | # ifndef __UCLIBC_HAS_FTW__ | |
651 | # undef HAVE_FTW | |
652 | # undef HAVE_NFTW | |
653 | # endif | |
654 | #endif | |
655 | ||
656 | #ifdef __dietlibc__ | |
657 | # undef HAVE_NFTW | |
658 | #endif | |
659 | ||
e39b673e | 660 | #if defined(__KLIBC__) |
661 | # undef HAVE_NFTW | |
662 | # undef HAVE_FTW | |
663 | #endif | |
664 | ||
45e878bb | 665 | #ifndef HAVE_NFTW |
173fc515 | 666 | # define FTW_PHYS 1 |
45e878bb NB |
667 | # ifndef HAVE_FTW |
668 | struct FTW {}; | |
173fc515 NB |
669 | # endif |
670 | #endif | |
671 | ||
45e878bb NB |
672 | #ifdef HAVE_FTW |
673 | # include <ftw.h> | |
674 | #endif | |
675 | ||
173fc515 NB |
676 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); |
677 | ||
f9ce90ba | 678 | |
64c4757e | 679 | extern int Manage_ro(char *devname, int fd, int readonly); |
91f068bf | 680 | extern int Manage_runstop(char *devname, int fd, int runstop, int quiet); |
dd0781e5 | 681 | extern int Manage_resize(char *devname, int fd, long long size, int raid_disks); |
b5e64645 | 682 | extern int Manage_reconfig(char *devname, int fd, int layout); |
64c4757e | 683 | extern int Manage_subdevs(char *devname, int fd, |
dab6685f | 684 | mddev_dev_t devlist, int verbose); |
1f48664b | 685 | extern int autodetect(void); |
e5329c37 | 686 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
8fac0577 | 687 | extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force); |
06b0d786 | 688 | extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file, |
e86c9dd6 NB |
689 | long long size, |
690 | int level, int layout, int chunksize, int raid_disks); | |
06b0d786 NB |
691 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
692 | int *fdlist, int cnt, char *backup_file); | |
64c4757e NB |
693 | |
694 | ||
82d9eba6 | 695 | extern int Assemble(struct supertype *st, char *mddev, int mdfd, |
52826846 | 696 | mddev_ident_t ident, |
06b0d786 | 697 | mddev_dev_t devlist, char *backup_file, |
64c4757e | 698 | int readonly, int runstop, |
e5eac01f | 699 | char *update, char *homehost, |
64c4757e NB |
700 | int verbose, int force); |
701 | ||
b5e64645 | 702 | extern int Build(char *mddev, int mdfd, int chunk, int level, int layout, |
64c4757e | 703 | int raiddisks, |
c82f047c | 704 | mddev_dev_t devlist, int assume_clean, |
dab6685f | 705 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose); |
64c4757e NB |
706 | |
707 | ||
82d9eba6 | 708 | extern int Create(struct supertype *st, char *mddev, int mdfd, |
5dd497ee | 709 | int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks, |
3d3dd91e | 710 | char *name, char *homehost, int *uuid, |
cd29a5c8 | 711 | int subdevs, mddev_dev_t devlist, |
47d79ef8 | 712 | int runstop, int verbose, int force, int assume_clean, |
dfd4d8ee | 713 | char *bitmap_file, int bitmap_chunk, int write_behind, int delay); |
64c4757e | 714 | |
54bad364 | 715 | extern int Detail(char *dev, int brief, int export, int test, char *homehost); |
e0d19036 | 716 | extern int Query(char *dev); |
0d726f17 KS |
717 | extern int Examine(mddev_dev_t devlist, int brief, int export, int scan, |
718 | int SparcAdjust, struct supertype *forcest, char *homehost); | |
cd29a5c8 | 719 | extern int Monitor(mddev_dev_t devlist, |
e0d19036 | 720 | char *mailaddr, char *alert_cmd, |
aa88f531 | 721 | int period, int daemonise, int scan, int oneshot, |
8aec876d | 722 | int dosyslog, int test, char *pidfile); |
64c4757e | 723 | |
111d01fc | 724 | extern int Kill(char *dev, int force, int quiet, int noexcl); |
b90c0e9a | 725 | extern int Wait(char *dev); |
1770662b | 726 | extern int WaitClean(char *dev); |
9a9dab36 | 727 | |
8382f19b NB |
728 | extern int Incremental(char *devname, int verbose, int runstop, |
729 | struct supertype *st, char *homehost, int autof); | |
598f0d58 NB |
730 | extern int Incremental_container(struct supertype *st, char *devname, |
731 | int verbose, int runstop, int autof); | |
8382f19b NB |
732 | extern void RebuildMap(void); |
733 | extern int IncrementalScan(int verbose); | |
734 | ||
c82f047c NB |
735 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
736 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 737 | unsigned long write_behind, |
dcec9ee5 NB |
738 | unsigned long long array_size, |
739 | int major); | |
55935d51 | 740 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
bf4fb153 | 741 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
c82f047c | 742 | |
64c4757e | 743 | extern int md_get_version(int fd); |
e0d19036 | 744 | extern int get_linux_version(void); |
64c4757e | 745 | extern int parse_uuid(char *str, int uuid[4]); |
682c7051 NB |
746 | extern int check_ext2(int fd, char *name); |
747 | extern int check_reiser(int fd, char *name); | |
748 | extern int check_raid(int fd, char *name); | |
64c4757e | 749 | |
dd0781e5 | 750 | extern int get_mdp_major(void); |
8b0dabea | 751 | extern int dev_open(char *dev, int flags); |
a931db9e | 752 | extern int open_dev_excl(int devnum); |
8d80900b | 753 | extern int is_standard(char *dev, int *nump); |
dd0781e5 | 754 | |
f1ae21c4 | 755 | extern int parse_auto(char *str, char *msg, int config); |
8aec876d NB |
756 | extern mddev_ident_t conf_get_ident(char *dev); |
757 | extern mddev_dev_t conf_get_devs(void); | |
8382f19b | 758 | extern int conf_test_dev(char *devname); |
8aec876d NB |
759 | extern struct createinfo *conf_get_create_info(void); |
760 | extern void set_conffile(char *file); | |
761 | extern char *conf_get_mailaddr(void); | |
762 | extern char *conf_get_mailfrom(void); | |
763 | extern char *conf_get_program(void); | |
764 | extern char *conf_get_homehost(void); | |
e0d19036 | 765 | extern char *conf_line(FILE *file); |
98c6faba | 766 | extern char *conf_word(FILE *file, int allow_key); |
e0d19036 NB |
767 | extern void free_line(char *line); |
768 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 769 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
f277ce36 | 770 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
350f29f9 | 771 | extern void copy_uuid(void *a, int b[4], int swapuuid); |
d7288ddc | 772 | extern char *fname_from_uuid(struct supertype *st, |
ff54de6e | 773 | struct mdinfo *info, char *buf, char sep); |
4b1ac34b | 774 | extern unsigned long calc_csum(void *super, int bytes); |
583315d9 | 775 | extern int enough(int level, int raid_disks, int layout, int clean, |
265e0f17 | 776 | char *avail, int avail_disks); |
e0d19036 | 777 | extern int ask(char *mesg); |
8fac0577 | 778 | extern unsigned long long get_component_size(int fd); |
0430ed48 | 779 | extern void remove_partitions(int fd); |
5f8097be NB |
780 | extern unsigned long long calc_array_size(int level, int raid_disks, int layout, |
781 | int chunksize, unsigned long long devsize); | |
edd8d13c NB |
782 | extern int flush_metadata_updates(struct supertype *st); |
783 | extern void append_metadata_update(struct supertype *st, void *buf, int len); | |
e0d19036 | 784 | |
7801ac20 N |
785 | extern int add_disk(int mdfd, struct supertype *st, |
786 | struct mdinfo *sra, struct mdinfo *info); | |
f35f2525 | 787 | extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info); |
cd29a5c8 | 788 | |
56eb10c0 | 789 | extern char *human_size(long long bytes); |
e0d19036 NB |
790 | char *human_size_brief(long long bytes); |
791 | ||
63152c1b NB |
792 | #define NoMdDev (1<<23) |
793 | extern int find_free_devnum(int use_partitions); | |
794 | ||
e0d19036 NB |
795 | extern void put_md_name(char *name); |
796 | extern char *get_md_name(int dev); | |
797 | ||
c913b90e | 798 | extern char DefaultConfFile[]; |
b5e64645 NB |
799 | |
800 | extern int open_mddev(char *dev, int autof); | |
8382f19b | 801 | extern int open_mddev_devnum(char *devname, int devnum, char *name, |
9a02c62a | 802 | char *chosen_name, int parts); |
a322f70c | 803 | extern int open_container(int fd); |
b5e64645 | 804 | |
a931db9e NB |
805 | extern int mdmon_running(int devnum); |
806 | extern int signal_mdmon(int devnum); | |
5dcfcb71 | 807 | extern int env_no_mdmon(void); |
8850ee3e | 808 | extern int start_mdmon(int devnum); |
a931db9e | 809 | |
2f6079dc | 810 | extern char *devnum2devname(int num); |
77472ff8 | 811 | extern int devname2devnum(char *name); |
c94709e8 | 812 | extern int stat2devnum(struct stat *st); |
2f6079dc | 813 | extern int fd2devnum(int fd); |
b5e64645 | 814 | |
a931db9e NB |
815 | static inline int dev2major(int d) |
816 | { | |
817 | if (d >= 0) | |
818 | return MD_MAJOR; | |
819 | else | |
820 | return get_mdp_major(); | |
821 | } | |
822 | ||
823 | static inline int dev2minor(int d) | |
824 | { | |
825 | if (d >= 0) | |
826 | return d; | |
827 | return (-1-d) << MdpMinorShift; | |
828 | } | |
829 | ||
6416d527 NB |
830 | static inline int ROUND_UP(int a, int base) |
831 | { | |
832 | return ((a+base-1)/base)*base; | |
833 | } | |
834 | ||
3c558363 N |
835 | static inline int is_subarray(char *vers) |
836 | { | |
e9dd1598 N |
837 | /* The version string for a 'subarray' (an array in a container) |
838 | * is | |
839 | * /containername/componentname for normal read-write arrays | |
840 | * -containername/componentname for read-only arrays. | |
841 | * containername is e.g. md0, md_d1 | |
842 | * componentname is dependant on the metadata. e.g. '1' 'S1' ... | |
843 | */ | |
844 | return (*vers == '/' || *vers == '-'); | |
3c558363 N |
845 | } |
846 | ||
b5e64645 NB |
847 | #define LEVEL_MULTIPATH (-4) |
848 | #define LEVEL_LINEAR (-1) | |
849 | #define LEVEL_FAULTY (-5) | |
850 | ||
17f25ca6 NB |
851 | /* kernel module doesn't know about these */ |
852 | #define LEVEL_CONTAINER (-100) | |
a322f70c | 853 | #define LEVEL_UNSUPPORTED (-200) |
17f25ca6 | 854 | |
b5e64645 NB |
855 | |
856 | /* faulty stuff */ | |
857 | ||
858 | #define WriteTransient 0 | |
859 | #define ReadTransient 1 | |
860 | #define WritePersistent 2 | |
861 | #define ReadPersistent 3 | |
862 | #define WriteAll 4 /* doesn't go to device */ | |
863 | #define ReadFixable 5 | |
864 | #define Modes 6 | |
865 | ||
866 | #define ClearErrors 31 | |
867 | #define ClearFaults 30 | |
868 | ||
869 | #define AllPersist 100 /* internal use only */ | |
870 | #define NoPersist 101 | |
871 | ||
872 | #define ModeMask 0x1f | |
873 | #define ModeShift 5 | |
fe6729fa NB |
874 | |
875 | ||
876 | #ifdef __TINYC__ | |
877 | #undef minor | |
878 | #undef major | |
879 | #undef makedev | |
880 | #define minor(x) ((x)&0xff) | |
881 | #define major(x) (((x)>>8)&0xff) | |
882 | #define makedev(M,m) (((M)<<8) | (m)) | |
883 | #endif | |
884 | ||
e86c9dd6 NB |
885 | /* for raid5 */ |
886 | #define ALGORITHM_LEFT_ASYMMETRIC 0 | |
887 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
888 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
889 | #define ALGORITHM_RIGHT_SYMMETRIC 3 |