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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> |
0d35d5c4 | 28 | #ifdef __GLIBC__ |
64c4757e | 29 | extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence)); |
0d35d5c4 | 30 | #elif !defined(lseek64) |
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> | |
d15a1f72 | 38 | #include <stdint.h> |
64c4757e NB |
39 | #include <stdlib.h> |
40 | #include <time.h> | |
11018a45 | 41 | #include <sys/time.h> |
64c4757e NB |
42 | #include <getopt.h> |
43 | #include <fcntl.h> | |
44 | #include <stdio.h> | |
45 | #include <errno.h> | |
46 | #include <string.h> | |
773135f5 | 47 | #include <syslog.h> |
977d12d7 JS |
48 | #ifdef __GLIBC__ |
49 | /* Newer glibc requires sys/sysmacros.h directly for makedev() */ | |
50 | #include <sys/sysmacros.h> | |
51 | #endif | |
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 | ||
e80357f8 GJ |
59 | #ifdef NO_COROSYNC |
60 | #define CS_OK 1 | |
61 | typedef uint64_t cmap_handle_t; | |
62 | #else | |
63 | #include <corosync/cmap.h> | |
64 | #endif | |
65 | ||
d15a1f72 GJ |
66 | #ifndef NO_DLM |
67 | #include <libdlm.h> | |
68 | #include <errno.h> | |
69 | #else | |
70 | #define LKF_NOQUEUE 0x00000001 | |
d15a1f72 GJ |
71 | #define LKM_PWMODE 4 |
72 | #define EUNLOCK 0x10002 | |
73 | ||
74 | typedef void *dlm_lshandle_t; | |
75 | ||
76 | struct dlm_lksb { | |
77 | int sb_status; | |
78 | uint32_t sb_lkid; | |
79 | char sb_flags; | |
80 | char *sb_lvbptr; | |
81 | }; | |
82 | #endif | |
83 | ||
64c4757e | 84 | #include <linux/kdev_t.h> |
e0d19036 NB |
85 | /*#include <linux/fs.h> */ |
86 | #include <sys/mount.h> | |
87 | #include <asm/types.h> | |
64c4757e NB |
88 | #include <sys/ioctl.h> |
89 | #define MD_MAJOR 9 | |
dd0781e5 | 90 | #define MdpMinorShift 6 |
64c4757e | 91 | |
e0d19036 | 92 | #ifndef BLKGETSIZE64 |
98c6faba | 93 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ |
e0d19036 | 94 | #endif |
56eb10c0 | 95 | |
c21e737b | 96 | #define DEFAULT_CHUNK 512 |
c82f047c NB |
97 | #define DEFAULT_BITMAP_CHUNK 4096 |
98 | #define DEFAULT_BITMAP_DELAY 5 | |
dfd4d8ee | 99 | #define DEFAULT_MAX_WRITE_BEHIND 256 |
64c4757e | 100 | |
753cf905 | 101 | /* MAP_DIR should be somewhere that persists across the pivotroot |
5d4d1b26 | 102 | * from early boot to late boot. |
96fd06ed | 103 | * /run seems to have emerged as the best standard. |
5d4d1b26 | 104 | */ |
753cf905 | 105 | #ifndef MAP_DIR |
96fd06ed | 106 | #define MAP_DIR "/run/mdadm" |
753cf905 DL |
107 | #endif /* MAP_DIR */ |
108 | /* MAP_FILE is what we name the map file we put in MAP_DIR, in case you | |
109 | * want something other than the default of "map" | |
110 | */ | |
111 | #ifndef MAP_FILE | |
112 | #define MAP_FILE "map" | |
113 | #endif /* MAP_FILE */ | |
114 | /* MDMON_DIR is where pid and socket files used for communicating | |
96fd06ed | 115 | * with mdmon normally live. Best is /var/run/mdadm as |
753cf905 DL |
116 | * mdmon is needed at early boot then it needs to write there prior |
117 | * to /var/run being mounted read/write, and it also then needs to | |
118 | * persist beyond when /var/run is mounter read-only. So, to be | |
119 | * safe, the default is somewhere that is read/write early in the | |
120 | * boot process and stays up as long as possible during shutdown. | |
121 | */ | |
122 | #ifndef MDMON_DIR | |
96fd06ed | 123 | #define MDMON_DIR "/run/mdadm" |
753cf905 | 124 | #endif /* MDMON_DIR */ |
5d4d1b26 | 125 | |
403410eb PC |
126 | /* FAILED_SLOTS is where to save files storing recent removal of array |
127 | * member in order to allow future reuse of disk inserted in the same | |
128 | * slot for array recovery | |
129 | */ | |
130 | #ifndef FAILED_SLOTS_DIR | |
96fd06ed | 131 | #define FAILED_SLOTS_DIR "/run/mdadm/failed-slots" |
403410eb PC |
132 | #endif /* FAILED_SLOTS */ |
133 | ||
64c4757e | 134 | #include "md_u.h" |
e0d19036 | 135 | #include "md_p.h" |
c82f047c | 136 | #include "bitmap.h" |
f7dd881f | 137 | #include "msg.h" |
64c4757e | 138 | |
1e0d770c | 139 | #include <endian.h> |
efd441d1 NB |
140 | /* Redhat don't like to #include <asm/byteorder.h>, and |
141 | * some time include <linux/byteorder/xxx_endian.h> isn't enough, | |
142 | * and there is no standard conversion function so... */ | |
0ae03b8a NB |
143 | /* And dietlibc doesn't think byteswap is ok, so.. */ |
144 | /* #include <byteswap.h> */ | |
dd47b4e0 JS |
145 | #define __mdadm_bswap_16(x) (((x) & 0x00ffU) << 8 | \ |
146 | ((x) & 0xff00U) >> 8) | |
147 | #define __mdadm_bswap_32(x) (((x) & 0x000000ffU) << 24 | \ | |
148 | ((x) & 0xff000000U) >> 24 | \ | |
149 | ((x) & 0x0000ff00U) << 8 | \ | |
150 | ((x) & 0x00ff0000U) >> 8) | |
151 | #define __mdadm_bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \ | |
152 | ((x) & 0xff00000000000000ULL) >> 56 | \ | |
153 | ((x) & 0x000000000000ff00ULL) << 40 | \ | |
154 | ((x) & 0x00ff000000000000ULL) >> 40 | \ | |
155 | ((x) & 0x0000000000ff0000ULL) << 24 | \ | |
156 | ((x) & 0x0000ff0000000000ULL) >> 24 | \ | |
157 | ((x) & 0x00000000ff000000ULL) << 8 | \ | |
158 | ((x) & 0x000000ff00000000ULL) >> 8) | |
0ae03b8a | 159 | |
e39b673e | 160 | #if !defined(__KLIBC__) |
efd441d1 | 161 | #if BYTE_ORDER == LITTLE_ENDIAN |
8a5f247d JS |
162 | #define __cpu_to_le16(_x) (unsigned int)(_x) |
163 | #define __cpu_to_le32(_x) (unsigned int)(_x) | |
164 | #define __cpu_to_le64(_x) (unsigned long long)(_x) | |
165 | #define __le16_to_cpu(_x) (unsigned int)(_x) | |
166 | #define __le32_to_cpu(_x) (unsigned int)(_x) | |
167 | #define __le64_to_cpu(_x) (unsigned long long)(_x) | |
974e620d | 168 | |
dd47b4e0 JS |
169 | #define __cpu_to_be16(_x) __mdadm_bswap_16(_x) |
170 | #define __cpu_to_be32(_x) __mdadm_bswap_32(_x) | |
171 | #define __cpu_to_be64(_x) __mdadm_bswap_64(_x) | |
172 | #define __be16_to_cpu(_x) __mdadm_bswap_16(_x) | |
173 | #define __be32_to_cpu(_x) __mdadm_bswap_32(_x) | |
174 | #define __be64_to_cpu(_x) __mdadm_bswap_64(_x) | |
efd441d1 | 175 | #elif BYTE_ORDER == BIG_ENDIAN |
dd47b4e0 JS |
176 | #define __cpu_to_le16(_x) __mdadm_bswap_16(_x) |
177 | #define __cpu_to_le32(_x) __mdadm_bswap_32(_x) | |
178 | #define __cpu_to_le64(_x) __mdadm_bswap_64(_x) | |
179 | #define __le16_to_cpu(_x) __mdadm_bswap_16(_x) | |
180 | #define __le32_to_cpu(_x) __mdadm_bswap_32(_x) | |
181 | #define __le64_to_cpu(_x) __mdadm_bswap_64(_x) | |
974e620d | 182 | |
8a5f247d JS |
183 | #define __cpu_to_be16(_x) (unsigned int)(_x) |
184 | #define __cpu_to_be32(_x) (unsigned int)(_x) | |
185 | #define __cpu_to_be64(_x) (unsigned long long)(_x) | |
186 | #define __be16_to_cpu(_x) (unsigned int)(_x) | |
187 | #define __be32_to_cpu(_x) (unsigned int)(_x) | |
188 | #define __be64_to_cpu(_x) (unsigned long long)(_x) | |
1e0d770c NB |
189 | #else |
190 | # error "unknown endianness." | |
191 | #endif | |
e39b673e | 192 | #endif /* __KLIBC__ */ |
1e0d770c | 193 | |
26714713 DD |
194 | /* |
195 | * Check at compile time that something is of a particular type. | |
196 | * Always evaluates to 1 so you may use it easily in comparisons. | |
197 | */ | |
198 | ||
199 | #define typecheck(type,x) \ | |
200 | ({ type __dummy; \ | |
201 | typeof(x) __dummy2; \ | |
202 | (void)(&__dummy == &__dummy2); \ | |
203 | 1; \ | |
204 | }) | |
205 | ||
206 | /* | |
207 | * These inlines deal with timer wrapping correctly. | |
208 | * | |
209 | * time_after(a,b) returns true if the time a is after time b. | |
210 | */ | |
211 | ||
212 | #define time_after(a,b) \ | |
213 | (typecheck(unsigned int, a) && \ | |
214 | typecheck(unsigned int, b) && \ | |
215 | ((int)((b) - (a)) < 0)) | |
216 | ||
217 | #define time_before(a,b) time_after(b,a) | |
218 | ||
1e5c6983 DW |
219 | /* |
220 | * min()/max()/clamp() macros that also do | |
221 | * strict type-checking.. See the | |
222 | * "unnecessary" pointer comparison. | |
223 | */ | |
224 | #define min(x, y) ({ \ | |
225 | typeof(x) _min1 = (x); \ | |
226 | typeof(y) _min2 = (y); \ | |
227 | (void) (&_min1 == &_min2); \ | |
228 | _min1 < _min2 ? _min1 : _min2; }) | |
229 | ||
230 | #define max(x, y) ({ \ | |
231 | typeof(x) _max1 = (x); \ | |
232 | typeof(y) _max2 = (y); \ | |
233 | (void) (&_max1 == &_max2); \ | |
234 | _max1 > _max2 ? _max1 : _max2; }) | |
1e0d770c | 235 | |
1c0aebc2 N |
236 | #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) |
237 | ||
d56dd607 PB |
238 | extern const char Name[]; |
239 | ||
bb758cca TM |
240 | struct md_bb_entry { |
241 | unsigned long long sector; | |
242 | int length; | |
243 | }; | |
244 | ||
245 | struct md_bb { | |
246 | int supported; | |
247 | int count; | |
248 | struct md_bb_entry *entries; | |
249 | }; | |
250 | ||
4b1ac34b NB |
251 | /* general information that might be extracted from a superblock */ |
252 | struct mdinfo { | |
253 | mdu_array_info_t array; | |
254 | mdu_disk_info_t disk; | |
255 | __u64 events; | |
fbf8a0b7 | 256 | int uuid[4]; |
31317663 | 257 | char name[33]; |
353632d9 | 258 | unsigned long long data_offset; |
fe384ca0 | 259 | unsigned long long new_data_offset; |
598f0d58 NB |
260 | unsigned long long component_size; /* same as array.size, except in |
261 | * sectors and up to 64bits. | |
262 | */ | |
da9b4a62 DW |
263 | unsigned long long custom_array_size; /* size for non-default sized |
264 | * arrays (in sectors) | |
265 | */ | |
81219e70 LM |
266 | #define NO_RESHAPE 0 |
267 | #define VOLUME_RESHAPE 1 | |
268 | #define CONTAINER_RESHAPE 2 | |
5e88ab2e | 269 | #define RESHAPE_NO_BACKUP 16 /* Mask 'or'ed in */ |
353632d9 NB |
270 | int reshape_active; |
271 | unsigned long long reshape_progress; | |
6e75048b AK |
272 | int recovery_blocked; /* for external metadata it |
273 | * indicates that there is | |
274 | * reshape in progress in | |
275 | * container, | |
276 | * for native metadata it is | |
277 | * reshape_active field mirror | |
278 | */ | |
051f3265 SL |
279 | int journal_device_required; |
280 | int journal_clean; | |
281 | ||
5308f117 AP |
282 | enum { |
283 | CONSISTENCY_POLICY_UNKNOWN, | |
284 | CONSISTENCY_POLICY_NONE, | |
285 | CONSISTENCY_POLICY_RESYNC, | |
286 | CONSISTENCY_POLICY_BITMAP, | |
287 | CONSISTENCY_POLICY_JOURNAL, | |
288 | CONSISTENCY_POLICY_PPL, | |
289 | } consistency_policy; | |
290 | ||
80bf9135 N |
291 | /* During reshape we can sometimes change the data_offset to avoid |
292 | * over-writing still-valid data. We need to know if there is space. | |
293 | * So getinfo_super will fill in space_before and space_after in sectors. | |
294 | * data_offset can be increased or decreased by this amount. | |
295 | */ | |
296 | unsigned long long space_before, space_after; | |
e1516be1 DW |
297 | union { |
298 | unsigned long long resync_start; /* per-array resync position */ | |
299 | unsigned long long recovery_start; /* per-device rebuild position */ | |
b7528a20 | 300 | #define MaxSector (~0ULL) /* resync/recovery complete position */ |
e1516be1 | 301 | }; |
fbdef498 | 302 | long bitmap_offset; /* 0 == none, 1 == a file */ |
2432ce9b | 303 | unsigned int ppl_size; |
e97a7cd0 | 304 | int ppl_offset; |
a86b1c8d | 305 | unsigned long long ppl_sector; |
a67dd8cc | 306 | unsigned long safe_mode_delay; /* ms delay to mark clean */ |
353632d9 | 307 | int new_level, delta_disks, new_layout, new_chunk; |
06c7f68e | 308 | int errors; |
f21e18ca | 309 | unsigned long cache_size; /* size of raid456 stripe cache*/ |
7e0f6979 NB |
310 | int mismatch_cnt; |
311 | char text_version[50]; | |
dd15dc4a NB |
312 | |
313 | int container_member; /* for assembling external-metatdata arrays | |
314 | * This is to be used internally by metadata | |
315 | * handler only */ | |
97b4d0e9 DW |
316 | int container_enough; /* flag external handlers can set to |
317 | * indicate that subarrays have not enough (-1), | |
318 | * enough to start (0), or all expected disks (1) */ | |
6e6e9874 | 319 | char sys_name[32]; |
7e0f6979 | 320 | struct mdinfo *devs; |
06c7f68e | 321 | struct mdinfo *next; |
549e9569 NB |
322 | |
323 | /* Device info for mdmon: */ | |
e1516be1 | 324 | int recovery_fd; |
549e9569 | 325 | int state_fd; |
6dc1785f TM |
326 | int bb_fd; |
327 | int ubb_fd; | |
8d45d196 DW |
328 | #define DS_FAULTY 1 |
329 | #define DS_INSYNC 2 | |
330 | #define DS_WRITE_MOSTLY 4 | |
331 | #define DS_SPARE 8 | |
332 | #define DS_BLOCKED 16 | |
333 | #define DS_REMOVE 1024 | |
92967543 | 334 | #define DS_UNBLOCK 2048 |
549e9569 | 335 | int prev_state, curr_state, next_state; |
5aa644c6 SL |
336 | |
337 | /* info read from sysfs */ | |
5e4ca8bb JS |
338 | enum { |
339 | ARRAY_CLEAR, | |
340 | ARRAY_INACTIVE, | |
341 | ARRAY_SUSPENDED, | |
342 | ARRAY_READONLY, | |
343 | ARRAY_READ_AUTO, | |
344 | ARRAY_CLEAN, | |
345 | ARRAY_ACTIVE, | |
346 | ARRAY_WRITE_PENDING, | |
347 | ARRAY_ACTIVE_IDLE, | |
348 | ARRAY_UNKNOWN_STATE, | |
349 | } array_state; | |
bb758cca | 350 | struct md_bb bb; |
4b1ac34b NB |
351 | }; |
352 | ||
5bbb4842 NB |
353 | struct createinfo { |
354 | int uid; | |
355 | int gid; | |
356 | int autof; | |
357 | int mode; | |
38098016 | 358 | int symlinks; |
eca944fa | 359 | int names; |
e2efe9e7 | 360 | int bblist; |
058574b1 | 361 | struct supertype *supertype; |
5bbb4842 NB |
362 | }; |
363 | ||
e0d19036 NB |
364 | enum mode { |
365 | ASSEMBLE=1, | |
366 | BUILD, | |
367 | CREATE, | |
368 | MANAGE, | |
369 | MISC, | |
370 | MONITOR, | |
dd0781e5 | 371 | GROW, |
8382f19b | 372 | INCREMENTAL, |
1f48664b | 373 | AUTODETECT, |
5187a385 | 374 | mode_count |
e0d19036 NB |
375 | }; |
376 | ||
64c4757e | 377 | extern char short_options[]; |
024768c4 | 378 | extern char short_bitmap_options[]; |
c06487ce | 379 | extern char short_bitmap_auto_options[]; |
64c4757e | 380 | extern struct option long_options[]; |
56eedc1a | 381 | extern char Version[], Usage[], Help[], OptionHelp[], |
5187a385 | 382 | *mode_help[], |
dd0781e5 | 383 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
8382f19b | 384 | Help_incr[], |
e0d19036 | 385 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 386 | |
997aed5d | 387 | /* for option that don't have short equivilents, we assign arbitrary |
1c7a808c | 388 | * numbers later than any 'short' character option. |
997aed5d NB |
389 | */ |
390 | enum special_options { | |
1c7a808c | 391 | AssumeClean = 300, |
997aed5d NB |
392 | BitmapChunk, |
393 | WriteBehind, | |
394 | ReAdd, | |
395 | NoDegraded, | |
396 | Sparc22, | |
1c7a808c | 397 | BackupFile, |
997aed5d | 398 | HomeHost, |
589395d6 | 399 | AutoHomeHost, |
38098016 | 400 | Symlinks, |
1f48664b | 401 | AutoDetect, |
1770662b | 402 | Waitclean, |
4cce4069 | 403 | DetailPlatform, |
33414a01 | 404 | KillSubarray, |
1c7a808c | 405 | UpdateSubarray, |
edde9560 | 406 | IncrementalPath, |
1c7a808c N |
407 | NoSharing, |
408 | HelpOptions, | |
409 | Brief, | |
410 | ManageOpt, | |
411 | Add, | |
f33a71f1 | 412 | AddSpare, |
01290056 | 413 | AddJournal, |
1c7a808c N |
414 | Remove, |
415 | Fail, | |
70c55e36 N |
416 | Replace, |
417 | With, | |
1c7a808c N |
418 | MiscOpt, |
419 | WaitOpt, | |
420 | ConfigFile, | |
421 | ChunkSize, | |
422 | WriteMostly, | |
71574efb N |
423 | FailFast, |
424 | NoFailFast, | |
1c7a808c N |
425 | Layout, |
426 | Auto, | |
427 | Force, | |
428 | SuperMinor, | |
429 | EMail, | |
430 | ProgramOpt, | |
431 | Increment, | |
432 | Fork, | |
433 | Bitmap, | |
434 | RebuildMapOpt, | |
87f26d14 | 435 | InvalidBackup, |
20b60dcd | 436 | UdevRules, |
b76b30e0 | 437 | FreezeReshape, |
2dddadb0 | 438 | Continue, |
08ca2adf | 439 | OffRootOpt, |
c2ecf5f6 | 440 | Prefer, |
f7d3febc | 441 | KillOpt, |
40c9a66a | 442 | DataOffset, |
6d388a88 | 443 | ExamineBB, |
74db60b0 N |
444 | Dump, |
445 | Restore, | |
a740cf64 | 446 | Action, |
529e2aa5 | 447 | Nodes, |
7716570e | 448 | ClusterName, |
4de90913 | 449 | ClusterConfirm, |
cc1799c3 | 450 | WriteJournal, |
5308f117 | 451 | ConsistencyPolicy, |
997aed5d NB |
452 | }; |
453 | ||
f0ec6710 MN |
454 | enum prefix_standard { |
455 | JEDEC, | |
456 | IEC | |
457 | }; | |
458 | ||
0aa2f15b GJ |
459 | enum bitmap_update { |
460 | NoUpdate, | |
461 | NameUpdate, | |
7e6e839a | 462 | NodeNumUpdate, |
0aa2f15b GJ |
463 | }; |
464 | ||
e22fe3ae N |
465 | enum flag_mode { |
466 | FlagDefault, FlagSet, FlagClear, | |
467 | }; | |
468 | ||
64c4757e | 469 | /* structures read from config file */ |
52826846 NB |
470 | /* List of mddevice names and identifiers |
471 | * Identifiers can be: | |
472 | * uuid=128-hex-uuid | |
473 | * super-minor=decimal-minor-number-from-superblock | |
474 | * devices=comma,separated,list,of,device,names,with,wildcards | |
475 | * | |
476 | * If multiple fields are present, the intersection of all matching | |
477 | * devices is considered | |
478 | */ | |
98c6faba | 479 | #define UnSet (0xfffe) |
fa56eddb | 480 | struct mddev_ident { |
dd0781e5 | 481 | char *devname; |
aba69144 | 482 | |
dd0781e5 | 483 | int uuid_set; |
3fa06e9d | 484 | int uuid[4]; |
947fd4dd | 485 | char name[33]; |
52826846 | 486 | |
f21e18ca | 487 | int super_minor; |
52826846 | 488 | |
dd0781e5 | 489 | char *devices; /* comma separated list of device |
52826846 NB |
490 | * names with wild cards |
491 | */ | |
dd0781e5 | 492 | int level; |
f21e18ca N |
493 | int raid_disks; |
494 | int spare_disks; | |
82d9eba6 | 495 | struct supertype *st; |
dd0781e5 NB |
496 | int autof; /* 1 for normal, 2 for partitioned */ |
497 | char *spare_group; | |
7ef02d01 | 498 | char *bitmap_file; |
c82f047c | 499 | int bitmap_fd; |
dd0781e5 | 500 | |
1771a6e2 N |
501 | char *container; /* /dev/whatever name of container, or |
502 | * uuid of container. You would expect | |
503 | * this to be the 'devname' or UUID | |
dbb44303 N |
504 | * of some other entry. |
505 | */ | |
506 | char *member; /* subarray within a container */ | |
507 | ||
fa56eddb | 508 | struct mddev_ident *next; |
b179246f N |
509 | union { |
510 | /* fields needed by different users of this structure */ | |
511 | int assembled; /* set when assembly succeeds */ | |
512 | }; | |
fa56eddb | 513 | }; |
64c4757e | 514 | |
9e33d556 N |
515 | struct context { |
516 | int readonly; | |
517 | int runstop; | |
518 | int verbose; | |
9e33d556 N |
519 | int brief; |
520 | int force; | |
521 | char *homehost; | |
522 | int require_homehost; | |
523 | char *prefer; | |
524 | int export; | |
525 | int test; | |
526 | char *subarray; | |
527 | char *update; | |
528 | int scan; | |
529 | int SparcAdjust; | |
530 | int autof; | |
531 | int delay; | |
532 | int freeze_reshape; | |
533 | char *backup_file; | |
534 | int invalid_backup; | |
a740cf64 | 535 | char *action; |
529e2aa5 | 536 | int nodes; |
7716570e | 537 | char *homecluster; |
9e33d556 N |
538 | }; |
539 | ||
e705e81b N |
540 | struct shape { |
541 | int raiddisks; | |
542 | int sparedisks; | |
cc1799c3 | 543 | int journaldisks; |
e705e81b N |
544 | int level; |
545 | int layout; | |
546 | char *layout_str; | |
547 | int chunk; | |
548 | int bitmap_chunk; | |
549 | char *bitmap_file; | |
550 | int assume_clean; | |
551 | int write_behind; | |
552 | unsigned long long size; | |
5308f117 | 553 | int consistency_policy; |
e705e81b N |
554 | }; |
555 | ||
64c4757e | 556 | /* List of device names - wildcards expanded */ |
a655e550 | 557 | struct mddev_dev { |
64c4757e | 558 | char *devname; |
c8e1a230 N |
559 | int disposition; /* 'a' for add, 'r' for remove, 'f' for fail, |
560 | * 'A' for re_add. | |
cd29a5c8 NB |
561 | * Not set for names read from .config |
562 | */ | |
e22fe3ae N |
563 | enum flag_mode writemostly; |
564 | enum flag_mode failfast; | |
70c55e36 | 565 | int used; /* set when used */ |
72ca9bcf | 566 | long long data_offset; |
a655e550 N |
567 | struct mddev_dev *next; |
568 | }; | |
64c4757e | 569 | |
682c7051 NB |
570 | typedef struct mapping { |
571 | char *name; | |
572 | int num; | |
573 | } mapping_t; | |
574 | ||
e0d19036 | 575 | struct mdstat_ent { |
4dd2df09 | 576 | char devnm[32]; |
e0d19036 NB |
577 | int active; |
578 | char *level; | |
7054da69 | 579 | char *pattern; /* U for up, _ for down */ |
e0d19036 | 580 | int percent; /* -1 if no resync */ |
f94c116f | 581 | int resync; /* 3 if check, 2 if reshape, 1 if resync, 0 if recovery */ |
549e9569 NB |
582 | int devcnt; |
583 | int raid_disks; | |
549e9569 | 584 | char * metadata_version; |
3b57c466 N |
585 | struct dev_member { |
586 | char *name; | |
587 | struct dev_member *next; | |
1011e834 | 588 | } *members; |
e0d19036 NB |
589 | struct mdstat_ent *next; |
590 | }; | |
591 | ||
22a88995 | 592 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
a7a0d8a1 | 593 | extern void mdstat_close(void); |
e0d19036 | 594 | extern void free_mdstat(struct mdstat_ent *ms); |
dd0781e5 | 595 | extern void mdstat_wait(int seconds); |
58a4ba2a | 596 | extern void mdstat_wait_fd(int fd, const sigset_t *sigmask); |
4dd2df09 | 597 | extern int mddev_busy(char *devnm); |
3b57c466 | 598 | extern struct mdstat_ent *mdstat_by_component(char *name); |
4dd2df09 | 599 | extern struct mdstat_ent *mdstat_by_subdev(char *subdev, char *container); |
8382f19b NB |
600 | |
601 | struct map_ent { | |
602 | struct map_ent *next; | |
4dd2df09 | 603 | char devnm[32]; |
1522c538 | 604 | char metadata[20]; |
8382f19b | 605 | int uuid[4]; |
195254b8 | 606 | int bad; |
8382f19b NB |
607 | char *path; |
608 | }; | |
4dd2df09 | 609 | extern int map_update(struct map_ent **mpp, char *devnm, char *metadata, |
8382f19b | 610 | int uuid[4], char *path); |
4dd2df09 | 611 | extern void map_remove(struct map_ent **map, char *devnm); |
8382f19b | 612 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); |
4dd2df09 | 613 | extern struct map_ent *map_by_devnm(struct map_ent **map, char *devnm); |
eb2306f8 | 614 | extern void map_free(struct map_ent *map); |
f2e55ecc | 615 | extern struct map_ent *map_by_name(struct map_ent **map, char *name); |
8382f19b NB |
616 | extern void map_read(struct map_ent **melp); |
617 | extern int map_write(struct map_ent *mel); | |
4dd2df09 | 618 | extern void map_delete(struct map_ent **mapp, char *devnm); |
8382f19b | 619 | extern void map_add(struct map_ent **melp, |
4dd2df09 | 620 | char *devnm, char *metadata, int uuid[4], char *path); |
ad5bc697 N |
621 | extern int map_lock(struct map_ent **melp); |
622 | extern void map_unlock(struct map_ent **melp); | |
cc700db3 | 623 | extern void map_fork(void); |
e0d19036 | 624 | |
e86c9dd6 | 625 | /* various details can be requested */ |
dab4a513 DW |
626 | enum sysfs_read_flags { |
627 | GET_LEVEL = (1 << 0), | |
628 | GET_LAYOUT = (1 << 1), | |
629 | GET_COMPONENT = (1 << 2), | |
630 | GET_CHUNK = (1 << 3), | |
631 | GET_CACHE = (1 << 4), | |
632 | GET_MISMATCH = (1 << 5), | |
633 | GET_VERSION = (1 << 6), | |
634 | GET_DISKS = (1 << 7), | |
635 | GET_DEGRADED = (1 << 8), | |
636 | GET_SAFEMODE = (1 << 9), | |
c0c1acd6 N |
637 | GET_BITMAP_LOCATION = (1 << 10), |
638 | ||
639 | GET_DEVS = (1 << 20), /* gets role, major, minor */ | |
640 | GET_OFFSET = (1 << 21), | |
641 | GET_SIZE = (1 << 22), | |
642 | GET_STATE = (1 << 23), | |
643 | GET_ERROR = (1 << 24), | |
5aa644c6 | 644 | GET_ARRAY_STATE = (1 << 25), |
5308f117 | 645 | GET_CONSISTENCY_POLICY = (1 << 26), |
dab4a513 | 646 | }; |
e86c9dd6 NB |
647 | |
648 | /* If fd >= 0, get the array it is open on, | |
4dd2df09 | 649 | * else use devnm. |
e86c9dd6 | 650 | */ |
4dd2df09 | 651 | extern int sysfs_open(char *devnm, char *devname, char *attr); |
dae13137 | 652 | extern int sysfs_init(struct mdinfo *mdi, int fd, char *devnm); |
9465f170 | 653 | extern void sysfs_init_dev(struct mdinfo *mdi, unsigned long devid); |
7e0f6979 | 654 | extern void sysfs_free(struct mdinfo *sra); |
4dd2df09 | 655 | extern struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options); |
1770662b DW |
656 | extern int sysfs_attr_match(const char *attr, const char *str); |
657 | extern int sysfs_match_word(const char *word, char **list); | |
7e0f6979 | 658 | extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 659 | char *name, char *val); |
7e0f6979 | 660 | extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 661 | char *name, unsigned long long val); |
012a8641 JS |
662 | extern int sysfs_set_num_signed(struct mdinfo *sra, struct mdinfo *dev, |
663 | char *name, long long val); | |
97590376 | 664 | extern int sysfs_uevent(struct mdinfo *sra, char *event); |
7236ee7a N |
665 | extern int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev, |
666 | char *name); | |
667 | extern int sysfs_fd_get_ll(int fd, unsigned long long *val); | |
7e0f6979 | 668 | extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 669 | char *name, unsigned long long *val); |
2eba8496 N |
670 | extern int sysfs_fd_get_two(int fd, unsigned long long *v1, unsigned long long *v2); |
671 | extern int sysfs_get_two(struct mdinfo *sra, struct mdinfo *dev, | |
672 | char *name, unsigned long long *v1, unsigned long long *v2); | |
7236ee7a | 673 | extern int sysfs_fd_get_str(int fd, char *val, int size); |
bc77ed53 DW |
674 | extern int sysfs_attribute_available(struct mdinfo *sra, struct mdinfo *dev, |
675 | char *name); | |
93ecfa01 N |
676 | extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
677 | char *name, char *val, int size); | |
8ed3e5e1 | 678 | extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms); |
f35f2525 | 679 | extern int sysfs_set_array(struct mdinfo *info, int vers); |
2904b26f | 680 | extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume); |
f1665f72 | 681 | extern int sysfs_disk_to_scsi_id(int fd, __u32 *id); |
4dd2df09 | 682 | extern int sysfs_unique_holder(char *devnm, long rdev); |
bc77ed53 | 683 | extern int sysfs_freeze_array(struct mdinfo *sra); |
efc67e8e | 684 | extern int sysfs_wait(int fd, int *msec); |
193b6c0b | 685 | extern int load_sys(char *path, char *buf, int len); |
130994cb AK |
686 | extern int reshape_prepare_fdlist(char *devname, |
687 | struct mdinfo *sra, | |
688 | int raid_disks, | |
689 | int nrdisks, | |
690 | unsigned long blocks, | |
691 | char *backup_file, | |
692 | int *fdlist, | |
693 | unsigned long long *offsets); | |
694 | extern void reshape_free_fdlist(int *fdlist, | |
695 | unsigned long long *offsets, | |
696 | int size); | |
e6e9d47b AK |
697 | extern int reshape_open_backup_file(char *backup, |
698 | int fd, | |
699 | char *devname, | |
700 | long blocks, | |
701 | int *fdlist, | |
a93f87ee | 702 | unsigned long long *offsets, |
54ded86f | 703 | char *sysfs_name, |
a93f87ee | 704 | int restart); |
1c009fc2 AK |
705 | extern unsigned long compute_backup_blocks(int nchunk, int ochunk, |
706 | unsigned int ndata, unsigned int odata); | |
54ded86f N |
707 | extern char *locate_backup(char *name); |
708 | extern char *make_backup(char *name); | |
e86c9dd6 NB |
709 | |
710 | extern int save_stripes(int *source, unsigned long long *offsets, | |
711 | int raid_disks, int chunk_size, int level, int layout, | |
712 | int nwrites, int *dest, | |
a6288483 N |
713 | unsigned long long start, unsigned long long length, |
714 | char *buf); | |
353632d9 NB |
715 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
716 | int raid_disks, int chunk_size, int level, int layout, | |
717 | int source, unsigned long long read_offset, | |
2fcb75ae AK |
718 | unsigned long long start, unsigned long long length, |
719 | char *src_buf); | |
e86c9dd6 | 720 | |
52826846 NB |
721 | #ifndef Sendmail |
722 | #define Sendmail "/usr/lib/sendmail -t" | |
723 | #endif | |
724 | ||
773135f5 NB |
725 | #define SYSLOG_FACILITY LOG_DAEMON |
726 | ||
682c7051 NB |
727 | extern char *map_num(mapping_t *map, int num); |
728 | extern int map_name(mapping_t *map, char *name); | |
5e4ca8bb JS |
729 | extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[]; |
730 | extern mapping_t consistency_policies[], sysfs_array_states[]; | |
682c7051 | 731 | |
c2ecf5f6 N |
732 | extern char *map_dev_preferred(int major, int minor, int create, |
733 | char *prefer); | |
734 | static inline char *map_dev(int major, int minor, int create) | |
735 | { | |
736 | return map_dev_preferred(major, minor, create, NULL); | |
737 | } | |
64c4757e | 738 | |
549e9569 | 739 | struct active_array; |
2e735d19 | 740 | struct metadata_update; |
64c4757e | 741 | |
80bf9135 | 742 | /* 'struct reshape' records the intermediate states of |
999b4972 N |
743 | * a general reshape. |
744 | * The starting geometry is converted to the 'before' geometry | |
745 | * by at most an atomic level change. They could be the same. | |
746 | * Similarly the 'after' geometry is converted to the final | |
747 | * geometry by at most a level change. | |
748 | * Note that 'before' and 'after' must have the same level. | |
749 | * 'blocks' is the minimum number of sectors for a reshape unit. | |
750 | * This will be a multiple of the stripe size in each of the | |
751 | * 'before' and 'after' geometries. | |
752 | * If 'blocks' is 0, no restriping is necessary. | |
89ecd3cf N |
753 | * 'min_offset_change' is the minimum change to data_offset to |
754 | * allow the reshape to happen. It is at least the larger of | |
755 | * the old and new chunk sizes, and typically the same as 'blocks' | |
756 | * divided by number of data disks. | |
999b4972 N |
757 | */ |
758 | struct reshape { | |
759 | int level; | |
760 | int parity; /* number of parity blocks/devices */ | |
761 | struct { | |
762 | int layout; | |
763 | int data_disks; | |
764 | } before, after; | |
765 | unsigned long long backup_blocks; | |
89ecd3cf | 766 | unsigned long long min_offset_change; |
999b4972 N |
767 | unsigned long long stripes; /* number of old stripes that comprise 'blocks'*/ |
768 | unsigned long long new_size; /* New size of array in sectors */ | |
769 | }; | |
770 | ||
7054da69 | 771 | /* A superswitch provides entry point to a metadata handler. |
6adfd3af | 772 | * |
74db60b0 | 773 | * The superswitch primarily operates on some "metadata" that |
6adfd3af NB |
774 | * is accessed via the 'supertype'. |
775 | * This metadata has one of three possible sources. | |
776 | * 1/ It is read from a single device. In this case it may not completely | |
777 | * describe the array or arrays as some information might be on other | |
778 | * devices. | |
779 | * 2/ It is read from all devices in a container. In this case all | |
780 | * information is present. | |
781 | * 3/ It is created by ->init_super / ->add_to_super. In this case it will | |
782 | * be complete once enough ->add_to_super calls have completed. | |
783 | * | |
784 | * When creating an array inside a container, the metadata will be | |
785 | * formed by a combination of 2 and 3. The metadata or the array is read, | |
786 | * then new information is added. | |
787 | * | |
788 | * The metadata must sometimes have a concept of a 'current' array | |
789 | * and a 'current' device. | |
790 | * The 'current' array is set by init_super to be the newly created array, | |
791 | * or is set by super_by_fd when it finds it is looking at an array inside | |
792 | * a container. | |
793 | * | |
794 | * The 'current' device is either the device that the metadata was read from | |
795 | * in case 1, or the last device added by add_to_super in case 3. | |
796 | * Case 2 does not identify a 'current' device. | |
797 | */ | |
f9ce90ba | 798 | extern struct superswitch { |
6adfd3af NB |
799 | |
800 | /* Used to report details of metadata read from a component | |
801 | * device. ->load_super has been called. | |
802 | */ | |
3da92f27 | 803 | void (*examine_super)(struct supertype *st, char *homehost); |
061f2c6a | 804 | void (*brief_examine_super)(struct supertype *st, int verbose); |
4737ae25 | 805 | void (*brief_examine_subarrays)(struct supertype *st, int verbose); |
0d726f17 | 806 | void (*export_examine_super)(struct supertype *st); |
6d388a88 | 807 | int (*examine_badblocks)(struct supertype *st, int fd, char *devname); |
74db60b0 | 808 | int (*copy_metadata)(struct supertype *st, int from, int to); |
6adfd3af NB |
809 | |
810 | /* Used to report details of an active array. | |
811 | * ->load_super was possibly given a 'component' string. | |
812 | */ | |
3da92f27 | 813 | void (*detail_super)(struct supertype *st, char *homehost); |
3da92f27 | 814 | void (*brief_detail_super)(struct supertype *st); |
0d726f17 | 815 | void (*export_detail_super)(struct supertype *st); |
6adfd3af | 816 | |
4cce4069 | 817 | /* Optional: platform hardware / firmware details */ |
9eafa1de MN |
818 | int (*detail_platform)(int verbose, int enumerate_only, char *controller_path); |
819 | int (*export_detail_platform)(int verbose, char *controller_path); | |
4cce4069 | 820 | |
6adfd3af NB |
821 | /* Used: |
822 | * to get uuid to storing in bitmap metadata | |
823 | * and 'reshape' backup-data metadata | |
824 | * To see if a device is being re-added to an array it was part of. | |
825 | */ | |
3da92f27 | 826 | void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
6adfd3af | 827 | |
8592f29d | 828 | /* Extract generic details from metadata. This could be details about |
6adfd3af NB |
829 | * the container, or about an individual array within the container. |
830 | * The determination is made either by: | |
831 | * load_super being given a 'component' string. | |
832 | * validate_geometry determining what to create. | |
d2ca6449 NB |
833 | * The info includes both array information and device information. |
834 | * The particular device should be: | |
835 | * The last device added by add_to_super | |
836 | * The device the metadata was loaded from by load_super | |
a5d85af7 N |
837 | * If 'map' is present, then it is an array raid_disks long |
838 | * (raid_disk must already be set and correct) and it is filled | |
839 | * with 1 for slots that are thought to be active and 0 for slots which | |
840 | * appear to be failed/missing. | |
95eeceeb | 841 | * *info is zeroed out before data is added. |
6adfd3af | 842 | */ |
a5d85af7 | 843 | void (*getinfo_super)(struct supertype *st, struct mdinfo *info, char *map); |
5c4cd5da | 844 | struct mdinfo *(*getinfo_super_disks)(struct supertype *st); |
6adfd3af | 845 | /* Check if the given metadata is flagged as belonging to "this" |
9362c1c8 | 846 | * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost" |
6adfd3af | 847 | */ |
3da92f27 | 848 | int (*match_home)(struct supertype *st, char *homehost); |
6adfd3af NB |
849 | |
850 | /* Make one of several generic modifications to metadata | |
851 | * prior to assembly (or other times). | |
852 | * sparc2.2 - first bug in early 0.90 metadata | |
853 | * super-minor - change name of 0.90 metadata | |
854 | * summaries - 'correct' any redundant data | |
855 | * resync - mark array as dirty to trigger a resync. | |
856 | * uuid - set new uuid - only 0.90 or 1.x | |
857 | * name - change the name of the array (where supported) | |
858 | * homehost - change which host this array is tied to. | |
859 | * devicesize - If metadata is at start of device, change recorded | |
860 | * device size to match actual device size | |
861 | * byteorder - swap bytes for 0.90 metadata | |
862 | * | |
863 | * force-one - mark that device as uptodate, not old or failed. | |
864 | * force-array - mark array as clean if it would not otherwise | |
865 | * assemble | |
866 | * assemble - not sure how this is different from force-one... | |
867 | * linear-grow-new - add a new device to a linear array, but don't | |
868 | * change the size: so superblock still matches | |
869 | * linear-grow-update - now change the size of the array. | |
16715c01 DL |
870 | * writemostly - set the WriteMostly1 bit in the superblock devflags |
871 | * readwrite - clear the WriteMostly1 bit in the superblock devflags | |
71574efb N |
872 | * failfast - set the FailFast1 bit in the superblock |
873 | * nofailfast - clear the FailFast1 bit | |
199f1a1f N |
874 | * no-bitmap - clear any record that a bitmap is present. |
875 | * bbl - add a bad-block-log if possible | |
6dd16dac N |
876 | * no-bbl - remove any bad-block-log is it is empty. |
877 | * force-no-bbl - remove any bad-block-log even if empty. | |
199f1a1f N |
878 | * revert-reshape - If a reshape is in progress, modify metadata so |
879 | * it will resume going in the opposite direction. | |
6adfd3af | 880 | */ |
68c7d6d7 | 881 | int (*update_super)(struct supertype *st, struct mdinfo *info, |
3da92f27 | 882 | char *update, |
e5eac01f NB |
883 | char *devname, int verbose, |
884 | int uuid_set, char *homehost); | |
6adfd3af NB |
885 | |
886 | /* Create new metadata for new array as described. This could | |
887 | * be a new container, or an array in a pre-existing container. | |
888 | * Also used to zero metadata prior to writing it to invalidate old | |
889 | * metadata. | |
890 | */ | |
3da92f27 | 891 | int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
5308f117 | 892 | struct shape *s, char *name, |
83cd1e97 N |
893 | char *homehost, int *uuid, |
894 | unsigned long long data_offset); | |
6adfd3af NB |
895 | |
896 | /* update the metadata to include new device, either at create or | |
897 | * when hot-adding a spare. | |
898 | */ | |
f20c3968 | 899 | int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
72ca9bcf N |
900 | int fd, char *devname, |
901 | unsigned long long data_offset); | |
1a64be56 LM |
902 | /* update the metadata to delete a device, |
903 | * when hot-removing. | |
904 | */ | |
905 | int (*remove_from_super)(struct supertype *st, mdu_disk_info_t *dinfo); | |
6adfd3af NB |
906 | |
907 | /* Write metadata to one device when fixing problems or adding | |
908 | * a new device. | |
909 | */ | |
3da92f27 | 910 | int (*store_super)(struct supertype *st, int fd); |
6adfd3af NB |
911 | |
912 | /* Write all metadata for this array. | |
913 | */ | |
111d01fc | 914 | int (*write_init_super)(struct supertype *st); |
e2f408a4 N |
915 | /* Check if metadata read from one device is compatible with an array, |
916 | * used when assembling an array, or pseudo-assembling was with | |
917 | * "--examine --brief" | |
918 | * If "st" has not yet been loaded the superblock from, "tst" is | |
919 | * moved in, otherwise the superblock in 'st' is compared with | |
920 | * 'tst'. | |
921 | */ | |
64557c33 | 922 | int (*compare_super)(struct supertype *st, struct supertype *tst); |
e2f408a4 N |
923 | /* Load metadata from a single device. If 'devname' is not NULL |
924 | * print error messages as appropriate */ | |
3da92f27 | 925 | int (*load_super)(struct supertype *st, int fd, char *devname); |
e2f408a4 N |
926 | /* 'fd' is a 'container' md array - load array metadata from the |
927 | * whole container. | |
928 | */ | |
2b959fbf | 929 | int (*load_container)(struct supertype *st, int fd, char *devname); |
e2f408a4 N |
930 | /* If 'arg' is a valid name of this metadata type, allocate and |
931 | * return a 'supertype' for the particular minor version */ | |
82d9eba6 | 932 | struct supertype * (*match_metadata_desc)(char *arg); |
e2f408a4 N |
933 | /* If a device has the given size, and the data_offset has been |
934 | * requested - work out how much space is available for data. | |
935 | * This involves adjusting for reserved space (e.g. bitmaps) | |
936 | * and for any rounding. | |
937 | * 'mdadm' only calls this for existing arrays where a possible | |
938 | * spare is being added. However some super-handlers call it | |
939 | * internally from validate_geometry when creating an array. | |
940 | */ | |
387fcd59 N |
941 | __u64 (*avail_size)(struct supertype *st, __u64 size, |
942 | unsigned long long data_offset); | |
e2f408a4 N |
943 | /* This is similar to 'avail_size' in purpose, but is used for |
944 | * containers for which there is no 'component size' to compare. | |
945 | * This reports that whole-device size which is a minimum | |
946 | */ | |
80e7f8c3 | 947 | unsigned long long (*min_acceptable_spare_size)(struct supertype *st); |
e2f408a4 N |
948 | /* Find somewhere to put a bitmap - possibly auto-size it - and |
949 | * update the metadata to record this. The array may be newly | |
950 | * created, in which case data_size may be updated, or it might | |
951 | * already exist. Metadata handler can know if init_super | |
952 | * has been called, but not write_init_super. | |
2ec2b7e9 JS |
953 | * 0: Success |
954 | * -Exxxx: On error | |
e2f408a4 | 955 | */ |
3da92f27 | 956 | int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
199171a2 | 957 | int delay, int write_behind, |
f9c25f1d | 958 | unsigned long long size, int may_change, int major); |
e2f408a4 N |
959 | /* Seek 'fd' to start of write-intent-bitmap. Must be an |
960 | * md-native format bitmap | |
961 | */ | |
b138214f | 962 | int (*locate_bitmap)(struct supertype *st, int fd, int node_num); |
e2f408a4 N |
963 | /* if add_internal_bitmap succeeded for existing array, this |
964 | * writes it out. | |
965 | */ | |
0aa2f15b | 966 | int (*write_bitmap)(struct supertype *st, int fd, enum bitmap_update update); |
e2f408a4 | 967 | /* Free the superblock and any other allocated data */ |
3da92f27 | 968 | void (*free_super)(struct supertype *st); |
78e44928 NB |
969 | |
970 | /* validate_geometry is called with an st returned by | |
971 | * match_metadata_desc. | |
e2f408a4 | 972 | * It should check that the geometry described is compatible with |
78e44928 NB |
973 | * the metadata type. It will be called repeatedly as devices |
974 | * added to validate changing size and new devices. If there are | |
975 | * inter-device dependencies, it should record sufficient details | |
976 | * so these can be validated. | |
30f58b22 | 977 | * Both 'size' and '*freesize' are in sectors. chunk is KiB. |
ecbd9e81 N |
978 | * Return value is: |
979 | * 1: everything is OK | |
980 | * 0: not OK for some reason - if 'verbose', then error was reported. | |
981 | * -1: st->sb was NULL, 'subdev' is a member of a container of this | |
e2f408a4 | 982 | * type, but array is not acceptable for some reason |
ecbd9e81 | 983 | * message was reported even if verbose is 0. |
78e44928 | 984 | */ |
17f25ca6 NB |
985 | int (*validate_geometry)(struct supertype *st, int level, int layout, |
986 | int raiddisks, | |
c21e737b | 987 | int *chunk, unsigned long long size, |
af4348dd | 988 | unsigned long long data_offset, |
2c514b71 | 989 | char *subdev, unsigned long long *freesize, |
5308f117 | 990 | int consistency_policy, int verbose); |
598f0d58 | 991 | |
e2f408a4 N |
992 | /* Return a linked list of 'mdinfo' structures for all arrays |
993 | * in the container. For non-containers, it is like | |
994 | * getinfo_super with an allocated mdinfo.*/ | |
00bbdbda | 995 | struct mdinfo *(*container_content)(struct supertype *st, char *subarray); |
30f58b22 DW |
996 | /* query the supertype for default geometry */ |
997 | void (*default_geometry)(struct supertype *st, int *level, int *layout, int *chunk); /* optional */ | |
33414a01 DW |
998 | /* Permit subarray's to be deleted from inactive containers */ |
999 | int (*kill_subarray)(struct supertype *st); /* optional */ | |
aa534678 | 1000 | /* Permit subarray's to be modified */ |
a951a4f7 | 1001 | int (*update_subarray)(struct supertype *st, char *subarray, |
fa56eddb | 1002 | char *update, struct mddev_ident *ident); /* optional */ |
7bc71196 DW |
1003 | /* Check if reshape is supported for this external format. |
1004 | * st is obtained from super_by_fd() where st->subarray[0] is | |
1005 | * initialized to indicate if reshape is being performed at the | |
1006 | * container or subarray level | |
1007 | */ | |
016e00f5 AK |
1008 | #define APPLY_METADATA_CHANGES 1 |
1009 | #define ROLLBACK_METADATA_CHANGES 0 | |
1010 | ||
d04f65f4 N |
1011 | int (*reshape_super)(struct supertype *st, |
1012 | unsigned long long size, int level, | |
7bc71196 | 1013 | int layout, int chunksize, int raid_disks, |
41784c88 | 1014 | int delta_disks, char *backup, char *dev, |
016e00f5 | 1015 | int direction, |
41784c88 | 1016 | int verbose); /* optional */ |
999b4972 N |
1017 | int (*manage_reshape)( /* optional */ |
1018 | int afd, struct mdinfo *sra, struct reshape *reshape, | |
1019 | struct supertype *st, unsigned long blocks, | |
1020 | int *fds, unsigned long long *offsets, | |
1021 | int dests, int *destfd, unsigned long long *destoffsets); | |
598f0d58 | 1022 | |
549e9569 | 1023 | /* for mdmon */ |
cba0191b NB |
1024 | int (*open_new)(struct supertype *c, struct active_array *a, |
1025 | char *inst); | |
ed9d66aa NB |
1026 | |
1027 | /* Tell the metadata handler the current state of the array. | |
1028 | * This covers whether it is known to be consistent (no pending writes) | |
01f157d7 | 1029 | * and how far along a resync is known to have progressed |
ed9d66aa NB |
1030 | * (in a->resync_start). |
1031 | * resync status is really irrelevant if the array is not consistent, | |
1032 | * but some metadata (DDF!) have a place to record the distinction. | |
1011e834 | 1033 | * If 'consistent' is '2', then the array can mark it dirty if a |
01f157d7 N |
1034 | * resync/recovery/whatever is required, or leave it clean if not. |
1035 | * Return value is 0 dirty (not consistent) and 1 if clean. | |
1036 | * it is only really important if consistent is passed in as '2'. | |
4e5528c6 | 1037 | */ |
01f157d7 | 1038 | int (*set_array_state)(struct active_array *a, int consistent); |
7a7cc504 NB |
1039 | |
1040 | /* When the state of a device might have changed, we call set_disk to | |
1041 | * tell the metadata what the current state is. | |
1042 | * Typically this happens on spare->in_sync and (spare|in_sync)->faulty | |
1043 | * transitions. | |
1044 | * set_disk might be called when the state of the particular disk has | |
1045 | * not in fact changed. | |
1046 | */ | |
8d45d196 | 1047 | void (*set_disk)(struct active_array *a, int n, int state); |
2e735d19 NB |
1048 | void (*sync_metadata)(struct supertype *st); |
1049 | void (*process_update)(struct supertype *st, | |
1050 | struct metadata_update *update); | |
5fe6f031 N |
1051 | /* Prepare updates allocates extra memory that might be |
1052 | * needed. If the update cannot be understood, return 0. | |
1053 | */ | |
1054 | int (*prepare_update)(struct supertype *st, | |
edd8d13c | 1055 | struct metadata_update *update); |
549e9569 | 1056 | |
6c3fb95c NB |
1057 | /* activate_spare will check if the array is degraded and, if it |
1058 | * is, try to find some spare space in the container. | |
1059 | * On success, it add appropriate updates (For process_update) to | |
1060 | * to the 'updates' list and returns a list of 'mdinfo' identifying | |
1061 | * the device, or devices as there might be multiple missing | |
1062 | * devices and multiple spares available. | |
1063 | */ | |
1064 | struct mdinfo *(*activate_spare)(struct active_array *a, | |
1065 | struct metadata_update **updates); | |
2cda7640 ML |
1066 | /* |
1067 | * Return statically allocated string that represents metadata specific | |
1068 | * controller domain of the disk. The domain is used in disk domain | |
1069 | * matching functions. Disks belong to the same domain if the they have | |
1070 | * the same domain from mdadm.conf and belong the same metadata domain. | |
1071 | * Returning NULL or not providing this handler means that metadata | |
1072 | * does not distinguish the differences between disks that belong to | |
1073 | * different controllers. They are in the domain specified by | |
1074 | * configuration file (mdadm.conf). | |
1075 | * In case when the metadata has the notion of domains based on disk | |
1076 | * it shall return NULL for disks that do not belong to the controller | |
1077 | * the supported domains. Such disks will form another domain and won't | |
1078 | * be mixed with supported ones. | |
1079 | */ | |
1080 | const char *(*get_disk_controller_domain)(const char *path); | |
549e9569 | 1081 | |
ba53ea59 AK |
1082 | /* for external backup area */ |
1083 | int (*recover_backup)(struct supertype *st, struct mdinfo *info); | |
1084 | ||
0c21b485 PB |
1085 | /* validate container after assemble */ |
1086 | int (*validate_container)(struct mdinfo *info); | |
1087 | ||
5308f117 AP |
1088 | /* write initial empty PPL on device */ |
1089 | int (*write_init_ppl)(struct supertype *st, struct mdinfo *info, int fd); | |
1090 | ||
2432ce9b AP |
1091 | /* validate ppl before assemble */ |
1092 | int (*validate_ppl)(struct supertype *st, struct mdinfo *info, | |
1093 | struct mdinfo *disk); | |
1094 | ||
1ab97c97 TM |
1095 | /* records new bad block in metadata */ |
1096 | int (*record_bad_block)(struct active_array *a, int n, | |
1097 | unsigned long long sector, int length); | |
1098 | ||
42d902d9 TM |
1099 | /* clears bad block from metadata */ |
1100 | int (*clear_bad_block)(struct active_array *a, int n, | |
1101 | unsigned long long sector, int length); | |
1102 | ||
1103 | /* get list of bad blocks from metadata */ | |
1104 | struct md_bb *(*get_bad_blocks)(struct active_array *a, int n); | |
1105 | ||
f277ce36 | 1106 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
d03373f1 | 1107 | int external; |
4cce4069 | 1108 | const char *name; /* canonical metadata name */ |
0f22b998 | 1109 | } *superlist[]; |
82d9eba6 | 1110 | |
0f22b998 N |
1111 | extern struct superswitch super0, super1; |
1112 | extern struct superswitch super_imsm, super_ddf; | |
0592faeb | 1113 | extern struct superswitch mbr, gpt; |
cdddbdbc | 1114 | |
edd8d13c NB |
1115 | struct metadata_update { |
1116 | int len; | |
1117 | char *buf; | |
1118 | void *space; /* allocated space that monitor will use */ | |
cb23f1f4 N |
1119 | void **space_list; /* list of allocated spaces that monitor can |
1120 | * use or that it returned. | |
1121 | */ | |
edd8d13c NB |
1122 | struct metadata_update *next; |
1123 | }; | |
1124 | ||
6adfd3af NB |
1125 | /* A supertype holds a particular collection of metadata. |
1126 | * It identifies the metadata type by the superswitch, and the particular | |
1127 | * sub-version of that metadata type. | |
1128 | * metadata read in or created is stored in 'sb' and 'info'. | |
1129 | * There are also fields used by mdmon to track containers. | |
1130 | * | |
352452c3 N |
1131 | * A supertype may refer to: |
1132 | * Just an array, possibly in a container | |
1133 | * A container, not identifying any particular array | |
1134 | * Info read from just one device, not yet fully describing the array/container. | |
1135 | * | |
1136 | * | |
6adfd3af NB |
1137 | * A supertype is created by: |
1138 | * super_by_fd | |
1139 | * guess_super | |
1140 | * dup_super | |
1141 | */ | |
82d9eba6 NB |
1142 | struct supertype { |
1143 | struct superswitch *ss; | |
1144 | int minor_version; | |
ea329559 | 1145 | int max_devs; |
4dd2df09 | 1146 | char container_devnm[32]; /* devnm of container */ |
64557c33 | 1147 | void *sb; |
111d01fc | 1148 | void *info; |
afa368f4 N |
1149 | void *other; /* Hack used to convert v0.90 to v1.0 */ |
1150 | unsigned long long devsize; | |
23bf42cc | 1151 | unsigned long long data_offset; /* used by v1.x only */ |
df3346e6 LM |
1152 | int ignore_hw_compat; /* used to inform metadata handlers that it should ignore |
1153 | HW/firmware related incompatability to load metadata. | |
1154 | Used when examining metadata to display content of disk | |
1155 | when user has no hw/firmare compatible system. | |
1156 | */ | |
edd8d13c NB |
1157 | struct metadata_update *updates; |
1158 | struct metadata_update **update_tail; | |
1159 | ||
549e9569 NB |
1160 | /* extra stuff used by mdmon */ |
1161 | struct active_array *arrays; | |
549e9569 | 1162 | int sock; /* listen to external programs */ |
4dd2df09 N |
1163 | char devnm[32]; /* e.g. md0. This appears in metadata_version: |
1164 | * external:/md0/12 | |
1165 | */ | |
549e9569 | 1166 | int devcnt; |
68226a80 | 1167 | int retry_soon; |
529e2aa5 | 1168 | int nodes; |
7716570e | 1169 | char *cluster_name; |
549e9569 NB |
1170 | |
1171 | struct mdinfo *devs; | |
1172 | ||
82d9eba6 | 1173 | }; |
f9ce90ba | 1174 | |
4725bc31 | 1175 | extern struct supertype *super_by_fd(int fd, char **subarray); |
54887ad8 N |
1176 | enum guess_types { guess_any, guess_array, guess_partitions }; |
1177 | extern struct supertype *guess_super_type(int fd, enum guess_types guess_type); | |
1178 | static inline struct supertype *guess_super(int fd) { | |
1179 | return guess_super_type(fd, guess_any); | |
1180 | } | |
3da92f27 | 1181 | extern struct supertype *dup_super(struct supertype *st); |
beae1dfe | 1182 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
32971509 | 1183 | extern int get_dev_sector_size(int fd, char *dname, unsigned int *sectsizep); |
3a371610 | 1184 | extern int must_be_container(int fd); |
0f0749ad | 1185 | extern int dev_size_from_id(dev_t id, unsigned long long *size); |
a7c6e3fb | 1186 | void wait_for(char *dev, int fd); |
f9ce90ba | 1187 | |
5527fc74 N |
1188 | /* |
1189 | * Data structures for policy management. | |
1190 | * Each device can have a policy structure that lists | |
1191 | * various name/value pairs each possibly with a metadata associated. | |
1192 | * The policy list is sorted by name/value/metadata | |
1193 | */ | |
1194 | struct dev_policy { | |
1195 | struct dev_policy *next; | |
1196 | char *name; /* None of these strings are allocated. They are | |
1197 | * all just references to strings which are known | |
1198 | * to exist elsewhere. | |
1199 | * name and metadata can be compared by address equality. | |
1200 | */ | |
1201 | const char *metadata; | |
2cda7640 | 1202 | const char *value; |
5527fc74 N |
1203 | }; |
1204 | ||
4e8d9f0a | 1205 | extern char pol_act[], pol_domain[], pol_metadata[], pol_auto[]; |
5527fc74 N |
1206 | |
1207 | /* iterate over the sublist starting at list, having the same | |
1208 | * 'name' as 'list', and matching the given metadata (Where | |
1209 | * NULL matches anything | |
1210 | */ | |
1211 | #define pol_for_each(item, list, _metadata) \ | |
1212 | for (item = list; \ | |
1213 | item && item->name == list->name; \ | |
1214 | item = item->next) \ | |
1215 | if (!(!_metadata || !item->metadata || _metadata == item->metadata)) \ | |
1216 | ; else | |
1217 | ||
1218 | /* | |
1219 | * policy records read from mdadm are largely just name-value pairs. | |
1220 | * The names are constants, not strdupped | |
1221 | */ | |
1222 | struct pol_rule { | |
1223 | struct pol_rule *next; | |
1224 | char *type; /* rule_policy or rule_part */ | |
1225 | struct rule { | |
1226 | struct rule *next; | |
1227 | char *name; | |
1228 | char *value; | |
1229 | char *dups; /* duplicates of 'value' with a partNN appended */ | |
1230 | } *rule; | |
1231 | }; | |
1232 | ||
1233 | extern char rule_policy[], rule_part[]; | |
1234 | extern char rule_path[], rule_type[]; | |
1235 | extern char type_part[], type_disk[]; | |
1236 | ||
1237 | extern void policyline(char *line, char *type); | |
4e8d9f0a | 1238 | extern void policy_add(char *type, ...); |
5527fc74 N |
1239 | extern void policy_free(void); |
1240 | ||
73c9c47c | 1241 | extern struct dev_policy *path_policy(char *path, char *type); |
5527fc74 | 1242 | extern struct dev_policy *disk_policy(struct mdinfo *disk); |
4dd2df09 | 1243 | extern struct dev_policy *devid_policy(int devid); |
5527fc74 N |
1244 | extern void dev_policy_free(struct dev_policy *p); |
1245 | ||
e78dda3b N |
1246 | //extern void pol_new(struct dev_policy **pol, char *name, char *val, char *metadata); |
1247 | extern void pol_add(struct dev_policy **pol, char *name, char *val, char *metadata); | |
5527fc74 N |
1248 | extern struct dev_policy *pol_find(struct dev_policy *pol, char *name); |
1249 | ||
e3bb5f14 N |
1250 | enum policy_action { |
1251 | act_default, | |
1252 | act_include, | |
1253 | act_re_add, | |
d2db3045 N |
1254 | act_spare, /* This only applies to bare devices */ |
1255 | act_spare_same_slot, /* this allows non-bare devices, | |
1256 | * but only if recent removal */ | |
1257 | act_force_spare, /* this allow non-bare devices in any case */ | |
e3bb5f14 N |
1258 | act_err |
1259 | }; | |
1260 | ||
1261 | extern int policy_action_allows(struct dev_policy *plist, const char *metadata, | |
1262 | enum policy_action want); | |
1263 | extern int disk_action_allows(struct mdinfo *disk, const char *metadata, | |
1264 | enum policy_action want); | |
f5f12c84 N |
1265 | |
1266 | struct domainlist { | |
1267 | struct domainlist *next; | |
2cda7640 | 1268 | const char *dom; |
f5f12c84 N |
1269 | }; |
1270 | ||
1271 | extern int domain_test(struct domainlist *dom, struct dev_policy *pol, | |
1272 | const char *metadata); | |
1273 | extern struct domainlist *domain_from_array(struct mdinfo *mdi, | |
1274 | const char *metadata); | |
4dd2df09 | 1275 | extern void domainlist_add_dev(struct domainlist **dom, int devid, |
e78dda3b | 1276 | const char *metadata); |
f5f12c84 N |
1277 | extern void domain_free(struct domainlist *dl); |
1278 | extern void domain_merge(struct domainlist **domp, struct dev_policy *pol, | |
1279 | const char *metadata); | |
e78dda3b | 1280 | void domain_add(struct domainlist **domp, char *domain); |
f5f12c84 | 1281 | |
403410eb PC |
1282 | extern void policy_save_path(char *id_path, struct map_ent *array); |
1283 | extern int policy_check_path(struct mdinfo *disk, struct map_ent *array); | |
1284 | ||
838acbc2 NB |
1285 | #if __GNUC__ < 3 |
1286 | struct stat64; | |
1287 | #endif | |
1288 | ||
45e878bb NB |
1289 | #define HAVE_NFTW we assume |
1290 | #define HAVE_FTW | |
1291 | ||
2df1f269 | 1292 | #ifdef __UCLIBC__ |
45e878bb | 1293 | # include <features.h> |
2df1f269 BRF |
1294 | # ifndef __UCLIBC_HAS_LFS__ |
1295 | # define lseek64 lseek | |
1296 | # endif | |
45e878bb NB |
1297 | # ifndef __UCLIBC_HAS_FTW__ |
1298 | # undef HAVE_FTW | |
1299 | # undef HAVE_NFTW | |
1300 | # endif | |
1301 | #endif | |
1302 | ||
1303 | #ifdef __dietlibc__ | |
1304 | # undef HAVE_NFTW | |
1305 | #endif | |
1306 | ||
e39b673e | 1307 | #if defined(__KLIBC__) |
1308 | # undef HAVE_NFTW | |
1309 | # undef HAVE_FTW | |
1310 | #endif | |
1311 | ||
45e878bb | 1312 | #ifndef HAVE_NFTW |
173fc515 | 1313 | # define FTW_PHYS 1 |
45e878bb NB |
1314 | # ifndef HAVE_FTW |
1315 | struct FTW {}; | |
173fc515 NB |
1316 | # endif |
1317 | #endif | |
1318 | ||
45e878bb NB |
1319 | #ifdef HAVE_FTW |
1320 | # include <ftw.h> | |
1321 | #endif | |
1322 | ||
173fc515 NB |
1323 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); |
1324 | ||
64c4757e | 1325 | extern int Manage_ro(char *devname, int fd, int readonly); |
d5a40416 | 1326 | extern int Manage_run(char *devname, int fd, struct context *c); |
fe7e0e64 N |
1327 | extern int Manage_stop(char *devname, int fd, int quiet, |
1328 | int will_retry); | |
64c4757e | 1329 | extern int Manage_subdevs(char *devname, int fd, |
833bb0f8 | 1330 | struct mddev_dev *devlist, int verbose, int test, |
11b391ec | 1331 | char *update, int force); |
1f48664b | 1332 | extern int autodetect(void); |
e5329c37 | 1333 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
50f01ba5 N |
1334 | extern int Grow_addbitmap(char *devname, int fd, |
1335 | struct context *c, struct shape *s); | |
32754b7d | 1336 | extern int Grow_reshape(char *devname, int fd, |
e2e53a2d | 1337 | struct mddev_dev *devlist, |
40c9a66a | 1338 | unsigned long long data_offset, |
32754b7d | 1339 | struct context *c, struct shape *s); |
06b0d786 | 1340 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
ea0ebe96 | 1341 | int *fdlist, int cnt, char *backup_file, int verbose); |
e9e43ec3 | 1342 | extern int Grow_continue(int mdfd, struct supertype *st, |
b76b30e0 | 1343 | struct mdinfo *info, char *backup_file, |
06e293d0 | 1344 | int forked, int freeze_reshape); |
860f11ed AP |
1345 | extern int Grow_consistency_policy(char *devname, int fd, |
1346 | struct context *c, struct shape *s); | |
b76b30e0 | 1347 | |
3f54bd62 AK |
1348 | extern int restore_backup(struct supertype *st, |
1349 | struct mdinfo *content, | |
1350 | int working_disks, | |
1351 | int spares, | |
54ded86f | 1352 | char **backup_filep, |
3f54bd62 | 1353 | int verbose); |
2dddadb0 AK |
1354 | extern int Grow_continue_command(char *devname, int fd, |
1355 | char *backup_file, int verbose); | |
64c4757e | 1356 | |
7f91af49 | 1357 | extern int Assemble(struct supertype *st, char *mddev, |
fa56eddb | 1358 | struct mddev_ident *ident, |
87f26d14 | 1359 | struct mddev_dev *devlist, |
4977146a | 1360 | struct context *c); |
64c4757e | 1361 | |
a4e8316a N |
1362 | extern int Build(char *mddev, struct mddev_dev *devlist, |
1363 | struct shape *s, struct context *c); | |
64c4757e | 1364 | |
7f91af49 | 1365 | extern int Create(struct supertype *st, char *mddev, |
171dccc8 | 1366 | char *name, int *uuid, |
a655e550 | 1367 | int subdevs, struct mddev_dev *devlist, |
99cc42f4 | 1368 | struct shape *s, |
40c9a66a N |
1369 | struct context *c, |
1370 | unsigned long long data_offset); | |
64c4757e | 1371 | |
ef898ce6 | 1372 | extern int Detail(char *dev, struct context *c); |
9eafa1de | 1373 | extern int Detail_Platform(struct superswitch *ss, int scan, int verbose, int export, char *controller_path); |
e0d19036 | 1374 | extern int Query(char *dev); |
6d388a88 | 1375 | extern int ExamineBadblocks(char *devname, int brief, struct supertype *forcest); |
eec3f887 N |
1376 | extern int Examine(struct mddev_dev *devlist, struct context *c, |
1377 | struct supertype *forcest); | |
a655e550 | 1378 | extern int Monitor(struct mddev_dev *devlist, |
e0d19036 | 1379 | char *mailaddr, char *alert_cmd, |
95c50205 N |
1380 | struct context *c, |
1381 | int daemonise, int oneshot, | |
1382 | int dosyslog, char *pidfile, int increments, | |
1383 | int share); | |
64c4757e | 1384 | |
ba728be7 N |
1385 | extern int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl); |
1386 | extern int Kill_subarray(char *dev, char *subarray, int verbose); | |
fa56eddb | 1387 | extern int Update_subarray(char *dev, char *subarray, char *update, struct mddev_ident *ident, int quiet); |
b90c0e9a | 1388 | extern int Wait(char *dev); |
9f1da824 | 1389 | extern int WaitClean(char *dev, int sock, int verbose); |
a740cf64 | 1390 | extern int SetAction(char *dev, char *action); |
9a9dab36 | 1391 | |
b11fe74d | 1392 | extern int Incremental(struct mddev_dev *devlist, struct context *c, |
11b6d91d | 1393 | struct supertype *st); |
8382f19b | 1394 | extern void RebuildMap(void); |
d5a40416 | 1395 | extern int IncrementalScan(struct context *c, char *devnm); |
950bc344 | 1396 | extern int IncrementalRemove(char *devname, char *path, int verbose); |
c82f047c NB |
1397 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
1398 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 1399 | unsigned long write_behind, |
dcec9ee5 NB |
1400 | unsigned long long array_size, |
1401 | int major); | |
55935d51 | 1402 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
20b60dcd | 1403 | extern int Write_rules(char *rule_name); |
bf4fb153 | 1404 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
561ad559 AP |
1405 | |
1406 | /* calculate the size of the bitmap given the array size and bitmap chunksize */ | |
1407 | static inline unsigned long long | |
1408 | bitmap_bits(unsigned long long array_size, unsigned long chunksize) | |
1409 | { | |
1410 | return (array_size * 512 + chunksize - 1) / chunksize; | |
1411 | } | |
1412 | ||
74db60b0 N |
1413 | extern int Dump_metadata(char *dev, char *dir, struct context *c, |
1414 | struct supertype *st); | |
1415 | extern int Restore_metadata(char *dev, char *dir, struct context *c, | |
1416 | struct supertype *st, int only); | |
c82f047c | 1417 | |
3ab8f4bf | 1418 | int md_array_active(int fd); |
9cd39f01 | 1419 | int md_get_array_info(int fd, struct mdu_array_info_s *array); |
018a4882 | 1420 | int md_set_array_info(int fd, struct mdu_array_info_s *array); |
d97572f5 | 1421 | int md_get_disk_info(int fd, struct mdu_disk_info_s *disk); |
e0d19036 | 1422 | extern int get_linux_version(void); |
bc77ed53 | 1423 | extern int mdadm_version(char *version); |
51d4261c | 1424 | extern unsigned long long parse_size(char *size); |
64c4757e | 1425 | extern int parse_uuid(char *str, int uuid[4]); |
4a06e2c2 N |
1426 | extern int parse_layout_10(char *layout); |
1427 | extern int parse_layout_faulty(char *layout); | |
79868890 | 1428 | extern long parse_num(char *num); |
4de90913 | 1429 | extern int parse_cluster_confirm_arg(char *inp, char **devname, int *slot); |
682c7051 NB |
1430 | extern int check_ext2(int fd, char *name); |
1431 | extern int check_reiser(int fd, char *name); | |
1432 | extern int check_raid(int fd, char *name); | |
53ed6ac3 KW |
1433 | extern int check_partitions(int fd, char *dname, |
1434 | unsigned long long freesize, | |
1435 | unsigned long long size); | |
64c4757e | 1436 | |
dd0781e5 | 1437 | extern int get_mdp_major(void); |
cc742d38 | 1438 | extern int get_maj_min(char *dev, int *major, int *minor); |
8b0dabea | 1439 | extern int dev_open(char *dev, int flags); |
4dd2df09 | 1440 | extern int open_dev(char *devnm); |
8832342d | 1441 | extern void reopen_mddev(int mdfd); |
4dd2df09 N |
1442 | extern int open_dev_flags(char *devnm, int flags); |
1443 | extern int open_dev_excl(char *devnm); | |
8d80900b | 1444 | extern int is_standard(char *dev, int *nump); |
9008ed1c | 1445 | extern int same_dev(char *one, char *two); |
9eafa1de | 1446 | extern int compare_paths (char* path1,char* path2); |
a7dec3fd | 1447 | extern void enable_fds(int devices); |
dd0781e5 | 1448 | |
f1ae21c4 | 1449 | extern int parse_auto(char *str, char *msg, int config); |
fa56eddb | 1450 | extern struct mddev_ident *conf_get_ident(char *dev); |
a655e550 | 1451 | extern struct mddev_dev *conf_get_devs(void); |
8382f19b | 1452 | extern int conf_test_dev(char *devname); |
4e8d9f0a | 1453 | extern int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost); |
8aec876d NB |
1454 | extern struct createinfo *conf_get_create_info(void); |
1455 | extern void set_conffile(char *file); | |
1456 | extern char *conf_get_mailaddr(void); | |
1457 | extern char *conf_get_mailfrom(void); | |
1458 | extern char *conf_get_program(void); | |
0ac91628 | 1459 | extern char *conf_get_homehost(int *require_homehostp); |
7716570e | 1460 | extern char *conf_get_homecluster(void); |
e0d19036 | 1461 | extern char *conf_line(FILE *file); |
98c6faba | 1462 | extern char *conf_word(FILE *file, int allow_key); |
7103b9b8 N |
1463 | extern void print_quoted(char *str); |
1464 | extern void print_escape(char *str); | |
06d2ffc3 | 1465 | extern int use_udev(void); |
2eba8496 | 1466 | extern unsigned long GCD(unsigned long a, unsigned long b); |
0ac91628 | 1467 | extern int conf_name_is_free(char *name); |
7c336758 | 1468 | extern int conf_verify_devnames(struct mddev_ident *array_list); |
0ac91628 | 1469 | extern int devname_matches(char *name, char *match); |
2244d1a9 N |
1470 | extern struct mddev_ident *conf_match(struct supertype *st, |
1471 | struct mdinfo *info, | |
1472 | char *devname, | |
1473 | int verbose, int *rvp); | |
6d11ec6f | 1474 | extern int experimental(void); |
0ac91628 | 1475 | |
e0d19036 NB |
1476 | extern void free_line(char *line); |
1477 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 1478 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
22e263f6 | 1479 | extern const int uuid_zero[4]; |
f277ce36 | 1480 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
350f29f9 | 1481 | extern void copy_uuid(void *a, int b[4], int swapuuid); |
aae5a112 | 1482 | extern char *__fname_from_uuid(int id[4], int swap, char *buf, char sep); |
d7288ddc | 1483 | extern char *fname_from_uuid(struct supertype *st, |
ff54de6e | 1484 | struct mdinfo *info, char *buf, char sep); |
4b1ac34b | 1485 | extern unsigned long calc_csum(void *super, int bytes); |
583315d9 | 1486 | extern int enough(int level, int raid_disks, int layout, int clean, |
de5a472e | 1487 | char *avail); |
8453e704 | 1488 | extern int enough_fd(int fd); |
e0d19036 | 1489 | extern int ask(char *mesg); |
8fac0577 | 1490 | extern unsigned long long get_component_size(int fd); |
0430ed48 | 1491 | extern void remove_partitions(int fd); |
691c6ee1 | 1492 | extern int test_partition(int fd); |
bfd76b93 | 1493 | extern int test_partition_from_id(dev_t id); |
577e8448 | 1494 | extern int get_data_disks(int level, int layout, int raid_disks); |
5f8097be NB |
1495 | extern unsigned long long calc_array_size(int level, int raid_disks, int layout, |
1496 | int chunksize, unsigned long long devsize); | |
edd8d13c NB |
1497 | extern int flush_metadata_updates(struct supertype *st); |
1498 | extern void append_metadata_update(struct supertype *st, void *buf, int len); | |
6234c63c | 1499 | extern int assemble_container_content(struct supertype *st, int mdfd, |
11b6d91d N |
1500 | struct mdinfo *content, |
1501 | struct context *c, | |
9ca39acb N |
1502 | char *chosen_name, int *result); |
1503 | #define INCR_NO 1 | |
1504 | #define INCR_UNSAFE 2 | |
1505 | #define INCR_ALREADY 4 | |
1506 | #define INCR_YES 8 | |
326727d9 AC |
1507 | extern struct mdinfo *container_choose_spares(struct supertype *st, |
1508 | unsigned long long min_size, | |
1509 | struct domainlist *domlist, | |
1510 | char *spare_group, | |
1511 | const char *metadata, int get_one); | |
d52bb542 | 1512 | extern int move_spare(char *from_devname, char *to_devname, dev_t devid); |
7801ac20 N |
1513 | extern int add_disk(int mdfd, struct supertype *st, |
1514 | struct mdinfo *sra, struct mdinfo *info); | |
de6ae750 N |
1515 | extern int remove_disk(int mdfd, struct supertype *st, |
1516 | struct mdinfo *sra, struct mdinfo *info); | |
1ab9ed2a N |
1517 | extern int hot_remove_disk(int mdfd, unsigned long dev, int force); |
1518 | extern int sys_hot_remove_disk(int statefd, int force); | |
f35f2525 | 1519 | extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info); |
1e5c6983 | 1520 | unsigned long long min_recovery_start(struct mdinfo *array); |
cd29a5c8 | 1521 | |
56eb10c0 | 1522 | extern char *human_size(long long bytes); |
f0ec6710 | 1523 | extern char *human_size_brief(long long bytes, int prefix); |
e4965ef8 | 1524 | extern void print_r10_layout(int layout); |
e0d19036 | 1525 | |
4dd2df09 | 1526 | extern char *find_free_devnm(int use_partitions); |
63152c1b | 1527 | |
e0d19036 | 1528 | extern void put_md_name(char *name); |
bc17158d | 1529 | extern char *devid2kname(int devid); |
13db17bd ML |
1530 | extern char *devid2devnm(dev_t devid); |
1531 | extern dev_t devnm2devid(char *devnm); | |
4dd2df09 | 1532 | extern char *get_md_name(char *devnm); |
e0d19036 | 1533 | |
c913b90e | 1534 | extern char DefaultConfFile[]; |
b5e64645 | 1535 | |
69207ff6 N |
1536 | extern int create_mddev(char *dev, char *name, int autof, int trustworthy, |
1537 | char *chosen); | |
1538 | /* values for 'trustworthy' */ | |
1539 | #define LOCAL 1 | |
d1d3482b | 1540 | #define LOCAL_ANY 10 |
69207ff6 N |
1541 | #define FOREIGN 2 |
1542 | #define METADATA 3 | |
6be1d39d | 1543 | extern int open_mddev(char *dev, int report_errors); |
a322f70c | 1544 | extern int open_container(int fd); |
4dd2df09 N |
1545 | extern int metadata_container_matches(char *metadata, char *devnm); |
1546 | extern int metadata_subdev_matches(char *metadata, char *devnm); | |
33414a01 DW |
1547 | extern int is_container_member(struct mdstat_ent *ent, char *devname); |
1548 | extern int is_subarray_active(char *subarray, char *devname); | |
feab51f8 | 1549 | extern int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet); |
33414a01 | 1550 | extern struct superswitch *version_to_superswitch(char *vers); |
b5e64645 | 1551 | |
4dd2df09 N |
1552 | extern int mdmon_running(char *devnm); |
1553 | extern int mdmon_pid(char *devnm); | |
40ebbb9c | 1554 | extern int check_env(char *name); |
148acb7b | 1555 | extern __u32 random32(void); |
c5f71c24 | 1556 | extern void random_uuid(__u8 *buf); |
4dd2df09 | 1557 | extern int start_mdmon(char *devnm); |
a931db9e | 1558 | |
999b4972 N |
1559 | extern int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, |
1560 | struct supertype *st, unsigned long stripes, | |
1561 | int *fds, unsigned long long *offsets, | |
1562 | int dests, int *destfd, unsigned long long *destoffsets); | |
10f22854 | 1563 | void abort_reshape(struct mdinfo *sra); |
999b4972 | 1564 | |
afa368f4 N |
1565 | void *super1_make_v0(struct supertype *st, struct mdinfo *info, mdp_super_t *sb0); |
1566 | ||
f96b1302 AP |
1567 | extern char *stat2kname(struct stat *st); |
1568 | extern char *fd2kname(int fd); | |
4dd2df09 N |
1569 | extern char *stat2devnm(struct stat *st); |
1570 | extern char *fd2devnm(int fd); | |
a931db9e | 1571 | |
a9c15847 | 1572 | extern int in_initrd(void); |
d15a1f72 | 1573 | |
e80357f8 GJ |
1574 | struct cmap_hooks { |
1575 | void *cmap_handle; /* corosync lib related */ | |
1576 | ||
1577 | int (*initialize)(cmap_handle_t *handle); | |
1578 | int (*get_string)(cmap_handle_t handle, | |
1579 | const char *string, | |
1580 | char **name); | |
1581 | int (*finalize)(cmap_handle_t handle); | |
1582 | }; | |
1583 | ||
1584 | extern void set_cmap_hooks(void); | |
1585 | extern void set_hooks(void); | |
1586 | ||
d15a1f72 GJ |
1587 | struct dlm_hooks { |
1588 | void *dlm_handle; /* dlm lib related */ | |
1589 | ||
1590 | dlm_lshandle_t (*create_lockspace)(const char *name, | |
1591 | unsigned int mode); | |
1592 | int (*release_lockspace)(const char *name, dlm_lshandle_t ls, | |
1593 | int force); | |
1594 | int (*ls_lock)(dlm_lshandle_t lockspace, uint32_t mode, | |
1595 | struct dlm_lksb *lksb, uint32_t flags, | |
1596 | const void *name, unsigned int namelen, | |
1597 | uint32_t parent, void (*astaddr) (void *astarg), | |
1598 | void *astarg, void (*bastaddr) (void *astarg), | |
1599 | void *range); | |
1600 | int (*ls_unlock)(dlm_lshandle_t lockspace, uint32_t lkid, | |
1601 | uint32_t flags, struct dlm_lksb *lksb, | |
1602 | void *astarg); | |
1603 | int (*ls_get_fd)(dlm_lshandle_t ls); | |
1604 | int (*dispatch)(int fd); | |
1605 | }; | |
1606 | ||
7716570e | 1607 | extern int get_cluster_name(char **name); |
81a8a694 GJ |
1608 | extern int dlm_funs_ready(void); |
1609 | extern int cluster_get_dlmlock(int *lockid); | |
1610 | extern int cluster_release_dlmlock(int lockid); | |
d15a1f72 | 1611 | extern void set_dlm_hooks(void); |
a9c15847 | 1612 | |
2d762ade | 1613 | #define _ROUND_UP(val, base) (((val) + (base) - 1) & ~(base - 1)) |
de897065 JS |
1614 | #define ROUND_UP(val, base) _ROUND_UP(val, (typeof(val))(base)) |
1615 | #define ROUND_UP_PTR(ptr, base) ((typeof(ptr)) \ | |
1616 | (ROUND_UP((unsigned long)(ptr), base))) | |
6416d527 | 1617 | |
3c558363 N |
1618 | static inline int is_subarray(char *vers) |
1619 | { | |
e9dd1598 | 1620 | /* The version string for a 'subarray' (an array in a container) |
1011e834 | 1621 | * is |
e9dd1598 | 1622 | * /containername/componentname for normal read-write arrays |
746a6567 N |
1623 | * -containername/componentname for arrays which mdmon must not |
1624 | * reconfigure. They might be read-only | |
1625 | * or might be undergoing reshape etc. | |
e9dd1598 N |
1626 | * containername is e.g. md0, md_d1 |
1627 | * componentname is dependant on the metadata. e.g. '1' 'S1' ... | |
1628 | */ | |
1629 | return (*vers == '/' || *vers == '-'); | |
3c558363 N |
1630 | } |
1631 | ||
e5408a32 DW |
1632 | static inline char *to_subarray(struct mdstat_ent *ent, char *container) |
1633 | { | |
1634 | return &ent->metadata_version[10+strlen(container)+1]; | |
1635 | } | |
1636 | ||
2a24d7b6 DW |
1637 | #ifdef DEBUG |
1638 | #define dprintf(fmt, arg...) \ | |
1ade5cc1 N |
1639 | fprintf(stderr, "%s: %s: "fmt, Name, __func__, ##arg) |
1640 | #define dprintf_cont(fmt, arg...) \ | |
2a24d7b6 DW |
1641 | fprintf(stderr, fmt, ##arg) |
1642 | #else | |
1643 | #define dprintf(fmt, arg...) \ | |
1ade5cc1 N |
1644 | ({ if (0) fprintf(stderr, "%s: %s: " fmt, Name, __func__, ##arg); 0; }) |
1645 | #define dprintf_cont(fmt, arg...) \ | |
2a24d7b6 DW |
1646 | ({ if (0) fprintf(stderr, fmt, ##arg); 0; }) |
1647 | #endif | |
1a0ee0ba DK |
1648 | #include <assert.h> |
1649 | #include <stdarg.h> | |
1650 | static inline int xasprintf(char **strp, const char *fmt, ...) { | |
1651 | va_list ap; | |
1652 | int ret; | |
1653 | va_start(ap, fmt); | |
089485cb | 1654 | ret = vasprintf(strp, fmt, ap); |
1a0ee0ba DK |
1655 | va_end(ap); |
1656 | assert(ret >= 0); | |
1657 | return ret; | |
1658 | } | |
2a24d7b6 | 1659 | |
1ade5cc1 N |
1660 | #ifdef DEBUG |
1661 | #define pr_err(fmt, args...) fprintf(stderr, "%s: %s: "fmt, Name, __func__, ##args) | |
1662 | #else | |
d56dd607 | 1663 | #define pr_err(fmt, args...) fprintf(stderr, "%s: "fmt, Name, ##args) |
1ade5cc1 | 1664 | #endif |
e7b84f9d N |
1665 | #define cont_err(fmt ...) fprintf(stderr, " " fmt) |
1666 | ||
503975b9 N |
1667 | void *xmalloc(size_t len); |
1668 | void *xrealloc(void *ptr, size_t len); | |
1669 | void *xcalloc(size_t num, size_t size); | |
1670 | char *xstrdup(const char *str); | |
1671 | ||
b5e64645 NB |
1672 | #define LEVEL_MULTIPATH (-4) |
1673 | #define LEVEL_LINEAR (-1) | |
1674 | #define LEVEL_FAULTY (-5) | |
1675 | ||
17f25ca6 NB |
1676 | /* kernel module doesn't know about these */ |
1677 | #define LEVEL_CONTAINER (-100) | |
a322f70c | 1678 | #define LEVEL_UNSUPPORTED (-200) |
17f25ca6 | 1679 | |
56cb05c4 N |
1680 | /* the kernel does know about this one ... */ |
1681 | #define LEVEL_NONE (-1000000) | |
1682 | ||
b5e64645 NB |
1683 | /* faulty stuff */ |
1684 | ||
1685 | #define WriteTransient 0 | |
1686 | #define ReadTransient 1 | |
1687 | #define WritePersistent 2 | |
1688 | #define ReadPersistent 3 | |
1689 | #define WriteAll 4 /* doesn't go to device */ | |
1690 | #define ReadFixable 5 | |
1691 | #define Modes 6 | |
1692 | ||
1693 | #define ClearErrors 31 | |
1694 | #define ClearFaults 30 | |
1695 | ||
1696 | #define AllPersist 100 /* internal use only */ | |
1697 | #define NoPersist 101 | |
1698 | ||
1699 | #define ModeMask 0x1f | |
1700 | #define ModeShift 5 | |
fe6729fa | 1701 | |
fe6729fa NB |
1702 | #ifdef __TINYC__ |
1703 | #undef minor | |
1704 | #undef major | |
1705 | #undef makedev | |
1706 | #define minor(x) ((x)&0xff) | |
1707 | #define major(x) (((x)>>8)&0xff) | |
1708 | #define makedev(M,m) (((M)<<8) | (m)) | |
1709 | #endif | |
1710 | ||
b640a252 | 1711 | /* for raid4/5/6 */ |
e86c9dd6 NB |
1712 | #define ALGORITHM_LEFT_ASYMMETRIC 0 |
1713 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
1714 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
1715 | #define ALGORITHM_RIGHT_SYMMETRIC 3 | |
b640a252 N |
1716 | |
1717 | /* Define non-rotating (raid4) algorithms. These allow | |
1718 | * conversion of raid4 to raid5. | |
1719 | */ | |
1720 | #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */ | |
1721 | #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */ | |
1722 | ||
1723 | /* DDF RAID6 layouts differ from md/raid6 layouts in two ways. | |
1724 | * Firstly, the exact positioning of the parity block is slightly | |
1725 | * different between the 'LEFT_*' modes of md and the "_N_*" modes | |
1726 | * of DDF. | |
1727 | * Secondly, or order of datablocks over which the Q syndrome is computed | |
1728 | * is different. | |
1729 | * Consequently we have different layouts for DDF/raid6 than md/raid6. | |
1730 | * These layouts are from the DDFv1.2 spec. | |
1731 | * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but | |
1732 | * leaves RLQ=3 as 'Vendor Specific' | |
1733 | */ | |
1734 | ||
1735 | #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */ | |
1736 | #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */ | |
1737 | #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */ | |
1738 | ||
b640a252 N |
1739 | /* For every RAID5 algorithm we define a RAID6 algorithm |
1740 | * with exactly the same layout for data and parity, and | |
1741 | * with the Q block always on the last device (N-1). | |
1742 | * This allows trivial conversion from RAID5 to RAID6 | |
1743 | */ | |
1744 | #define ALGORITHM_LEFT_ASYMMETRIC_6 16 | |
1745 | #define ALGORITHM_RIGHT_ASYMMETRIC_6 17 | |
1746 | #define ALGORITHM_LEFT_SYMMETRIC_6 18 | |
1747 | #define ALGORITHM_RIGHT_SYMMETRIC_6 19 | |
1748 | #define ALGORITHM_PARITY_0_6 20 | |
1749 | #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N | |
1750 | ||
33a6535d AW |
1751 | /* Define PATH_MAX in case we don't use glibc or standard library does |
1752 | * not have PATH_MAX defined. Assume max path length is 4K characters. | |
1753 | */ | |
1754 | #ifndef PATH_MAX | |
1755 | #define PATH_MAX 4096 | |
1756 | #endif | |
1757 | ||
9dad51d4 N |
1758 | #define RESYNC_NONE -1 |
1759 | #define RESYNC_DELAYED -2 | |
1760 | #define RESYNC_PENDING -3 | |
1761 | #define RESYNC_UNKNOWN -4 | |
a0963a86 | 1762 | |
480f3566 N |
1763 | /* When using "GET_DISK_INFO" it isn't certain how high |
1764 | * we need to check. So we impose an absolute limit of | |
1765 | * MAX_DISKS. This needs to be much more than the largest | |
1766 | * number of devices any metadata can support. Currently | |
1767 | * v1.x can support 1920 | |
1768 | */ | |
1769 | #define MAX_DISKS 4096 | |
1770 | ||
d04f65f4 N |
1771 | /* Sometimes the 'size' value passed needs to mean "Maximum". |
1772 | * In those cases with use MAX_SIZE | |
1773 | */ | |
1774 | #define MAX_SIZE 1 | |
822e393a N |
1775 | |
1776 | /* We want to use unsigned numbers for sector counts, but need | |
1777 | * a value for 'invalid'. Use '1'. | |
1778 | */ | |
1779 | #define INVALID_SECTORS 1 | |
72ca9bcf N |
1780 | /* And another special number needed for --data_offset=variable */ |
1781 | #define VARIABLE_OFFSET 3 |