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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 | 35 | |
7fcbfd7c | 36 | #include <assert.h> |
64c4757e NB |
37 | #include <sys/types.h> |
38 | #include <sys/stat.h> | |
7fcbfd7c | 39 | #include <stdarg.h> |
d15a1f72 | 40 | #include <stdint.h> |
64c4757e NB |
41 | #include <stdlib.h> |
42 | #include <time.h> | |
11018a45 | 43 | #include <sys/time.h> |
64c4757e NB |
44 | #include <getopt.h> |
45 | #include <fcntl.h> | |
46 | #include <stdio.h> | |
47 | #include <errno.h> | |
48 | #include <string.h> | |
773135f5 | 49 | #include <syslog.h> |
a35aa68f | 50 | #include <stdbool.h> |
83a379cf | 51 | #include <signal.h> |
977d12d7 JS |
52 | /* Newer glibc requires sys/sysmacros.h directly for makedev() */ |
53 | #include <sys/sysmacros.h> | |
b56c3630 NB |
54 | #ifdef __dietlibc__ |
55 | #include <strings.h> | |
280a927d NB |
56 | /* dietlibc has deprecated random and srandom!! */ |
57 | #define random rand | |
58 | #define srandom srand | |
98c6faba NB |
59 | #endif |
60 | ||
e80357f8 GJ |
61 | #ifdef NO_COROSYNC |
62 | #define CS_OK 1 | |
63 | typedef uint64_t cmap_handle_t; | |
64 | #else | |
65 | #include <corosync/cmap.h> | |
66 | #endif | |
67 | ||
d15a1f72 GJ |
68 | #ifndef NO_DLM |
69 | #include <libdlm.h> | |
70 | #include <errno.h> | |
71 | #else | |
72 | #define LKF_NOQUEUE 0x00000001 | |
d15a1f72 GJ |
73 | #define LKM_PWMODE 4 |
74 | #define EUNLOCK 0x10002 | |
75 | ||
76 | typedef void *dlm_lshandle_t; | |
77 | ||
78 | struct dlm_lksb { | |
79 | int sb_status; | |
80 | uint32_t sb_lkid; | |
81 | char sb_flags; | |
82 | char *sb_lvbptr; | |
83 | }; | |
84 | #endif | |
85 | ||
64c4757e | 86 | #include <linux/kdev_t.h> |
e0d19036 NB |
87 | /*#include <linux/fs.h> */ |
88 | #include <sys/mount.h> | |
89 | #include <asm/types.h> | |
64c4757e NB |
90 | #include <sys/ioctl.h> |
91 | #define MD_MAJOR 9 | |
dd0781e5 | 92 | #define MdpMinorShift 6 |
64c4757e | 93 | |
e0d19036 | 94 | #ifndef BLKGETSIZE64 |
98c6faba | 95 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */ |
e0d19036 | 96 | #endif |
56eb10c0 | 97 | |
c21e737b | 98 | #define DEFAULT_CHUNK 512 |
c82f047c NB |
99 | #define DEFAULT_BITMAP_CHUNK 4096 |
100 | #define DEFAULT_BITMAP_DELAY 5 | |
dfd4d8ee | 101 | #define DEFAULT_MAX_WRITE_BEHIND 256 |
64c4757e | 102 | |
0f8347d4 MT |
103 | /* DEV_NUM_PREF is a subpath to numbered MD devices, e.g. /dev/md1 or directory name. |
104 | * DEV_NUM_PREF_LEN is a length with Null byte excluded. | |
105 | */ | |
106 | #ifndef DEV_NUM_PREF | |
107 | #define DEV_NUM_PREF "/dev/md" | |
108 | #define DEV_NUM_PREF_LEN (sizeof(DEV_NUM_PREF) - 1) | |
109 | #endif /* DEV_NUM_PREF */ | |
110 | ||
b9ce7ab0 MT |
111 | /* DEV_MD_DIR points to named MD devices directory. |
112 | * DEV_MD_DIR_LEN is a length with Null byte excluded. | |
113 | */ | |
114 | #ifndef DEV_MD_DIR | |
115 | #define DEV_MD_DIR "/dev/md/" | |
116 | #define DEV_MD_DIR_LEN (sizeof(DEV_MD_DIR) - 1) | |
117 | #endif /* DEV_MD_DIR */ | |
118 | ||
753cf905 | 119 | /* MAP_DIR should be somewhere that persists across the pivotroot |
5d4d1b26 | 120 | * from early boot to late boot. |
96fd06ed | 121 | * /run seems to have emerged as the best standard. |
5d4d1b26 | 122 | */ |
753cf905 | 123 | #ifndef MAP_DIR |
96fd06ed | 124 | #define MAP_DIR "/run/mdadm" |
753cf905 DL |
125 | #endif /* MAP_DIR */ |
126 | /* MAP_FILE is what we name the map file we put in MAP_DIR, in case you | |
127 | * want something other than the default of "map" | |
128 | */ | |
129 | #ifndef MAP_FILE | |
130 | #define MAP_FILE "map" | |
131 | #endif /* MAP_FILE */ | |
132 | /* MDMON_DIR is where pid and socket files used for communicating | |
96fd06ed | 133 | * with mdmon normally live. Best is /var/run/mdadm as |
753cf905 DL |
134 | * mdmon is needed at early boot then it needs to write there prior |
135 | * to /var/run being mounted read/write, and it also then needs to | |
136 | * persist beyond when /var/run is mounter read-only. So, to be | |
137 | * safe, the default is somewhere that is read/write early in the | |
138 | * boot process and stays up as long as possible during shutdown. | |
139 | */ | |
140 | #ifndef MDMON_DIR | |
96fd06ed | 141 | #define MDMON_DIR "/run/mdadm" |
753cf905 | 142 | #endif /* MDMON_DIR */ |
5d4d1b26 | 143 | |
403410eb PC |
144 | /* FAILED_SLOTS is where to save files storing recent removal of array |
145 | * member in order to allow future reuse of disk inserted in the same | |
146 | * slot for array recovery | |
147 | */ | |
148 | #ifndef FAILED_SLOTS_DIR | |
96fd06ed | 149 | #define FAILED_SLOTS_DIR "/run/mdadm/failed-slots" |
403410eb PC |
150 | #endif /* FAILED_SLOTS */ |
151 | ||
ff6bb131 MT |
152 | #ifndef MDMON_SERVICE |
153 | #define MDMON_SERVICE "mdmon" | |
154 | #endif /* MDMON_SERVICE */ | |
155 | ||
156 | #ifndef GROW_SERVICE | |
157 | #define GROW_SERVICE "mdadm-grow-continue" | |
158 | #endif /* GROW_SERVICE */ | |
159 | ||
64c4757e | 160 | #include "md_u.h" |
e0d19036 | 161 | #include "md_p.h" |
c82f047c | 162 | #include "bitmap.h" |
f7dd881f | 163 | #include "msg.h" |
64c4757e | 164 | |
1e0d770c | 165 | #include <endian.h> |
efd441d1 NB |
166 | /* Redhat don't like to #include <asm/byteorder.h>, and |
167 | * some time include <linux/byteorder/xxx_endian.h> isn't enough, | |
168 | * and there is no standard conversion function so... */ | |
0ae03b8a NB |
169 | /* And dietlibc doesn't think byteswap is ok, so.. */ |
170 | /* #include <byteswap.h> */ | |
dd47b4e0 JS |
171 | #define __mdadm_bswap_16(x) (((x) & 0x00ffU) << 8 | \ |
172 | ((x) & 0xff00U) >> 8) | |
173 | #define __mdadm_bswap_32(x) (((x) & 0x000000ffU) << 24 | \ | |
174 | ((x) & 0xff000000U) >> 24 | \ | |
175 | ((x) & 0x0000ff00U) << 8 | \ | |
176 | ((x) & 0x00ff0000U) >> 8) | |
177 | #define __mdadm_bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \ | |
178 | ((x) & 0xff00000000000000ULL) >> 56 | \ | |
179 | ((x) & 0x000000000000ff00ULL) << 40 | \ | |
180 | ((x) & 0x00ff000000000000ULL) >> 40 | \ | |
181 | ((x) & 0x0000000000ff0000ULL) << 24 | \ | |
182 | ((x) & 0x0000ff0000000000ULL) >> 24 | \ | |
183 | ((x) & 0x00000000ff000000ULL) << 8 | \ | |
184 | ((x) & 0x000000ff00000000ULL) >> 8) | |
0ae03b8a | 185 | |
e39b673e | 186 | #if !defined(__KLIBC__) |
efd441d1 | 187 | #if BYTE_ORDER == LITTLE_ENDIAN |
8a5f247d JS |
188 | #define __cpu_to_le16(_x) (unsigned int)(_x) |
189 | #define __cpu_to_le32(_x) (unsigned int)(_x) | |
190 | #define __cpu_to_le64(_x) (unsigned long long)(_x) | |
191 | #define __le16_to_cpu(_x) (unsigned int)(_x) | |
192 | #define __le32_to_cpu(_x) (unsigned int)(_x) | |
193 | #define __le64_to_cpu(_x) (unsigned long long)(_x) | |
974e620d | 194 | |
dd47b4e0 JS |
195 | #define __cpu_to_be16(_x) __mdadm_bswap_16(_x) |
196 | #define __cpu_to_be32(_x) __mdadm_bswap_32(_x) | |
197 | #define __cpu_to_be64(_x) __mdadm_bswap_64(_x) | |
198 | #define __be16_to_cpu(_x) __mdadm_bswap_16(_x) | |
199 | #define __be32_to_cpu(_x) __mdadm_bswap_32(_x) | |
200 | #define __be64_to_cpu(_x) __mdadm_bswap_64(_x) | |
efd441d1 | 201 | #elif BYTE_ORDER == BIG_ENDIAN |
dd47b4e0 JS |
202 | #define __cpu_to_le16(_x) __mdadm_bswap_16(_x) |
203 | #define __cpu_to_le32(_x) __mdadm_bswap_32(_x) | |
204 | #define __cpu_to_le64(_x) __mdadm_bswap_64(_x) | |
205 | #define __le16_to_cpu(_x) __mdadm_bswap_16(_x) | |
206 | #define __le32_to_cpu(_x) __mdadm_bswap_32(_x) | |
207 | #define __le64_to_cpu(_x) __mdadm_bswap_64(_x) | |
974e620d | 208 | |
8a5f247d JS |
209 | #define __cpu_to_be16(_x) (unsigned int)(_x) |
210 | #define __cpu_to_be32(_x) (unsigned int)(_x) | |
211 | #define __cpu_to_be64(_x) (unsigned long long)(_x) | |
212 | #define __be16_to_cpu(_x) (unsigned int)(_x) | |
213 | #define __be32_to_cpu(_x) (unsigned int)(_x) | |
214 | #define __be64_to_cpu(_x) (unsigned long long)(_x) | |
1e0d770c NB |
215 | #else |
216 | # error "unknown endianness." | |
217 | #endif | |
e39b673e | 218 | #endif /* __KLIBC__ */ |
1e0d770c | 219 | |
7039d1f8 JS |
220 | /* |
221 | * Partially stolen from include/linux/unaligned/packed_struct.h | |
222 | */ | |
223 | struct __una_u16 { __u16 x; } __attribute__ ((packed)); | |
224 | struct __una_u32 { __u32 x; } __attribute__ ((packed)); | |
225 | ||
226 | static inline __u16 __get_unaligned16(const void *p) | |
227 | { | |
228 | const struct __una_u16 *ptr = (const struct __una_u16 *)p; | |
229 | return ptr->x; | |
230 | } | |
231 | ||
232 | static inline __u32 __get_unaligned32(const void *p) | |
233 | { | |
234 | const struct __una_u32 *ptr = (const struct __una_u32 *)p; | |
235 | return ptr->x; | |
236 | } | |
237 | ||
238 | static inline void __put_unaligned16(__u16 val, void *p) | |
239 | { | |
240 | struct __una_u16 *ptr = (struct __una_u16 *)p; | |
241 | ptr->x = val; | |
242 | } | |
243 | ||
244 | static inline void __put_unaligned32(__u32 val, void *p) | |
245 | { | |
246 | struct __una_u32 *ptr = (struct __una_u32 *)p; | |
247 | ptr->x = val; | |
248 | } | |
249 | ||
26714713 DD |
250 | /* |
251 | * Check at compile time that something is of a particular type. | |
252 | * Always evaluates to 1 so you may use it easily in comparisons. | |
253 | */ | |
254 | ||
255 | #define typecheck(type,x) \ | |
256 | ({ type __dummy; \ | |
257 | typeof(x) __dummy2; \ | |
258 | (void)(&__dummy == &__dummy2); \ | |
259 | 1; \ | |
260 | }) | |
261 | ||
262 | /* | |
263 | * These inlines deal with timer wrapping correctly. | |
264 | * | |
265 | * time_after(a,b) returns true if the time a is after time b. | |
266 | */ | |
267 | ||
268 | #define time_after(a,b) \ | |
269 | (typecheck(unsigned int, a) && \ | |
270 | typecheck(unsigned int, b) && \ | |
271 | ((int)((b) - (a)) < 0)) | |
272 | ||
273 | #define time_before(a,b) time_after(b,a) | |
274 | ||
1e5c6983 DW |
275 | /* |
276 | * min()/max()/clamp() macros that also do | |
277 | * strict type-checking.. See the | |
278 | * "unnecessary" pointer comparison. | |
279 | */ | |
280 | #define min(x, y) ({ \ | |
281 | typeof(x) _min1 = (x); \ | |
282 | typeof(y) _min2 = (y); \ | |
283 | (void) (&_min1 == &_min2); \ | |
284 | _min1 < _min2 ? _min1 : _min2; }) | |
285 | ||
286 | #define max(x, y) ({ \ | |
287 | typeof(x) _max1 = (x); \ | |
288 | typeof(y) _max2 = (y); \ | |
289 | (void) (&_max1 == &_max2); \ | |
290 | _max1 > _max2 ? _max1 : _max2; }) | |
1e0d770c | 291 | |
1c0aebc2 N |
292 | #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) |
293 | ||
577fd104 LG |
294 | #define KIB_TO_BYTES(x) ((x) << 10) |
295 | #define SEC_TO_BYTES(x) ((x) << 9) | |
296 | ||
67417d92 MT |
297 | /** |
298 | * This is true for native and DDF, IMSM allows 16. | |
299 | */ | |
300 | #define MD_NAME_MAX 32 | |
301 | ||
d56dd607 PB |
302 | extern const char Name[]; |
303 | ||
bb758cca TM |
304 | struct md_bb_entry { |
305 | unsigned long long sector; | |
306 | int length; | |
307 | }; | |
308 | ||
309 | struct md_bb { | |
310 | int supported; | |
311 | int count; | |
312 | struct md_bb_entry *entries; | |
313 | }; | |
314 | ||
4b1ac34b NB |
315 | /* general information that might be extracted from a superblock */ |
316 | struct mdinfo { | |
317 | mdu_array_info_t array; | |
318 | mdu_disk_info_t disk; | |
319 | __u64 events; | |
fbf8a0b7 | 320 | int uuid[4]; |
31317663 | 321 | char name[33]; |
353632d9 | 322 | unsigned long long data_offset; |
fe384ca0 | 323 | unsigned long long new_data_offset; |
598f0d58 NB |
324 | unsigned long long component_size; /* same as array.size, except in |
325 | * sectors and up to 64bits. | |
326 | */ | |
da9b4a62 DW |
327 | unsigned long long custom_array_size; /* size for non-default sized |
328 | * arrays (in sectors) | |
329 | */ | |
81219e70 LM |
330 | #define NO_RESHAPE 0 |
331 | #define VOLUME_RESHAPE 1 | |
332 | #define CONTAINER_RESHAPE 2 | |
5e88ab2e | 333 | #define RESHAPE_NO_BACKUP 16 /* Mask 'or'ed in */ |
353632d9 NB |
334 | int reshape_active; |
335 | unsigned long long reshape_progress; | |
6e75048b AK |
336 | int recovery_blocked; /* for external metadata it |
337 | * indicates that there is | |
338 | * reshape in progress in | |
339 | * container, | |
340 | * for native metadata it is | |
341 | * reshape_active field mirror | |
342 | */ | |
051f3265 SL |
343 | int journal_device_required; |
344 | int journal_clean; | |
345 | ||
5308f117 AP |
346 | enum { |
347 | CONSISTENCY_POLICY_UNKNOWN, | |
348 | CONSISTENCY_POLICY_NONE, | |
349 | CONSISTENCY_POLICY_RESYNC, | |
350 | CONSISTENCY_POLICY_BITMAP, | |
351 | CONSISTENCY_POLICY_JOURNAL, | |
352 | CONSISTENCY_POLICY_PPL, | |
353 | } consistency_policy; | |
354 | ||
80bf9135 N |
355 | /* During reshape we can sometimes change the data_offset to avoid |
356 | * over-writing still-valid data. We need to know if there is space. | |
357 | * So getinfo_super will fill in space_before and space_after in sectors. | |
358 | * data_offset can be increased or decreased by this amount. | |
359 | */ | |
360 | unsigned long long space_before, space_after; | |
e1516be1 DW |
361 | union { |
362 | unsigned long long resync_start; /* per-array resync position */ | |
363 | unsigned long long recovery_start; /* per-device rebuild position */ | |
b7528a20 | 364 | #define MaxSector (~0ULL) /* resync/recovery complete position */ |
e1516be1 | 365 | }; |
fbdef498 | 366 | long bitmap_offset; /* 0 == none, 1 == a file */ |
2432ce9b | 367 | unsigned int ppl_size; |
e97a7cd0 | 368 | int ppl_offset; |
a86b1c8d | 369 | unsigned long long ppl_sector; |
a67dd8cc | 370 | unsigned long safe_mode_delay; /* ms delay to mark clean */ |
353632d9 | 371 | int new_level, delta_disks, new_layout, new_chunk; |
06c7f68e | 372 | int errors; |
f21e18ca | 373 | unsigned long cache_size; /* size of raid456 stripe cache*/ |
7e0f6979 NB |
374 | int mismatch_cnt; |
375 | char text_version[50]; | |
dd15dc4a NB |
376 | |
377 | int container_member; /* for assembling external-metatdata arrays | |
378 | * This is to be used internally by metadata | |
379 | * handler only */ | |
476b00bd MT |
380 | /** |
381 | * flag external handlers can set to indicate that subarrays have: | |
382 | * - not enough disks to start (-1), | |
383 | * - enough disks to start (0), | |
384 | * - all expected disks (1). | |
385 | */ | |
386 | int container_enough; | |
6e6e9874 | 387 | char sys_name[32]; |
7e0f6979 | 388 | struct mdinfo *devs; |
06c7f68e | 389 | struct mdinfo *next; |
549e9569 NB |
390 | |
391 | /* Device info for mdmon: */ | |
e1516be1 | 392 | int recovery_fd; |
549e9569 | 393 | int state_fd; |
6dc1785f TM |
394 | int bb_fd; |
395 | int ubb_fd; | |
8d45d196 DW |
396 | #define DS_FAULTY 1 |
397 | #define DS_INSYNC 2 | |
398 | #define DS_WRITE_MOSTLY 4 | |
399 | #define DS_SPARE 8 | |
400 | #define DS_BLOCKED 16 | |
401 | #define DS_REMOVE 1024 | |
92967543 | 402 | #define DS_UNBLOCK 2048 |
549e9569 | 403 | int prev_state, curr_state, next_state; |
5aa644c6 SL |
404 | |
405 | /* info read from sysfs */ | |
5e4ca8bb JS |
406 | enum { |
407 | ARRAY_CLEAR, | |
408 | ARRAY_INACTIVE, | |
409 | ARRAY_SUSPENDED, | |
410 | ARRAY_READONLY, | |
411 | ARRAY_READ_AUTO, | |
412 | ARRAY_CLEAN, | |
413 | ARRAY_ACTIVE, | |
414 | ARRAY_WRITE_PENDING, | |
415 | ARRAY_ACTIVE_IDLE, | |
43ebc910 | 416 | ARRAY_BROKEN, |
5e4ca8bb JS |
417 | ARRAY_UNKNOWN_STATE, |
418 | } array_state; | |
bb758cca | 419 | struct md_bb bb; |
4b1ac34b NB |
420 | }; |
421 | ||
5bbb4842 NB |
422 | struct createinfo { |
423 | int uid; | |
424 | int gid; | |
425 | int autof; | |
426 | int mode; | |
eca944fa | 427 | int names; |
e2efe9e7 | 428 | int bblist; |
058574b1 | 429 | struct supertype *supertype; |
5bbb4842 NB |
430 | }; |
431 | ||
fbfdcb06 | 432 | struct spare_criteria { |
0c0f09cb | 433 | bool criteria_set; |
fbfdcb06 | 434 | unsigned long long min_size; |
4b57ecf6 | 435 | unsigned int sector_size; |
fbfdcb06 AO |
436 | }; |
437 | ||
67417d92 MT |
438 | typedef enum mdadm_status { |
439 | MDADM_STATUS_SUCCESS = 0, | |
440 | MDADM_STATUS_ERROR, | |
441 | MDADM_STATUS_UNDEF, | |
442 | } mdadm_status_t; | |
443 | ||
e0d19036 NB |
444 | enum mode { |
445 | ASSEMBLE=1, | |
446 | BUILD, | |
447 | CREATE, | |
448 | MANAGE, | |
449 | MISC, | |
450 | MONITOR, | |
dd0781e5 | 451 | GROW, |
8382f19b | 452 | INCREMENTAL, |
1f48664b | 453 | AUTODETECT, |
5187a385 | 454 | mode_count |
e0d19036 NB |
455 | }; |
456 | ||
64c4757e | 457 | extern char short_options[]; |
6c9d9260 | 458 | extern char short_monitor_options[]; |
024768c4 | 459 | extern char short_bitmap_options[]; |
c06487ce | 460 | extern char short_bitmap_auto_options[]; |
64c4757e | 461 | extern struct option long_options[]; |
56eedc1a | 462 | extern char Version[], Usage[], Help[], OptionHelp[], |
5187a385 | 463 | *mode_help[], |
dd0781e5 | 464 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
8382f19b | 465 | Help_incr[], |
e0d19036 | 466 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 467 | |
997aed5d | 468 | /* for option that don't have short equivilents, we assign arbitrary |
1c7a808c | 469 | * numbers later than any 'short' character option. |
997aed5d NB |
470 | */ |
471 | enum special_options { | |
1c7a808c | 472 | AssumeClean = 300, |
577fd104 | 473 | WriteZeroes, |
997aed5d NB |
474 | BitmapChunk, |
475 | WriteBehind, | |
476 | ReAdd, | |
477 | NoDegraded, | |
478 | Sparc22, | |
1c7a808c | 479 | BackupFile, |
997aed5d | 480 | HomeHost, |
589395d6 | 481 | AutoHomeHost, |
1f48664b | 482 | AutoDetect, |
1770662b | 483 | Waitclean, |
4cce4069 | 484 | DetailPlatform, |
33414a01 | 485 | KillSubarray, |
1c7a808c | 486 | UpdateSubarray, |
edde9560 | 487 | IncrementalPath, |
1c7a808c N |
488 | NoSharing, |
489 | HelpOptions, | |
490 | Brief, | |
d11abe4b | 491 | NoDevices, |
1c7a808c N |
492 | ManageOpt, |
493 | Add, | |
f33a71f1 | 494 | AddSpare, |
01290056 | 495 | AddJournal, |
1c7a808c N |
496 | Remove, |
497 | Fail, | |
70c55e36 N |
498 | Replace, |
499 | With, | |
1c7a808c N |
500 | MiscOpt, |
501 | WaitOpt, | |
502 | ConfigFile, | |
503 | ChunkSize, | |
504 | WriteMostly, | |
71574efb N |
505 | FailFast, |
506 | NoFailFast, | |
1c7a808c N |
507 | Layout, |
508 | Auto, | |
509 | Force, | |
510 | SuperMinor, | |
511 | EMail, | |
512 | ProgramOpt, | |
513 | Increment, | |
514 | Fork, | |
515 | Bitmap, | |
516 | RebuildMapOpt, | |
87f26d14 | 517 | InvalidBackup, |
20b60dcd | 518 | UdevRules, |
b76b30e0 | 519 | FreezeReshape, |
2dddadb0 | 520 | Continue, |
08ca2adf | 521 | OffRootOpt, |
c2ecf5f6 | 522 | Prefer, |
f7d3febc | 523 | KillOpt, |
40c9a66a | 524 | DataOffset, |
6d388a88 | 525 | ExamineBB, |
74db60b0 N |
526 | Dump, |
527 | Restore, | |
a740cf64 | 528 | Action, |
529e2aa5 | 529 | Nodes, |
7716570e | 530 | ClusterName, |
4de90913 | 531 | ClusterConfirm, |
cc1799c3 | 532 | WriteJournal, |
5308f117 | 533 | ConsistencyPolicy, |
997aed5d NB |
534 | }; |
535 | ||
2568ce89 MK |
536 | enum update_opt { |
537 | UOPT_NAME = 1, | |
538 | UOPT_PPL, | |
539 | UOPT_NO_PPL, | |
540 | UOPT_BITMAP, | |
541 | UOPT_NO_BITMAP, | |
542 | UOPT_SUBARRAY_ONLY, | |
543 | UOPT_SPARC22, | |
544 | UOPT_SUPER_MINOR, | |
545 | UOPT_SUMMARIES, | |
546 | UOPT_RESYNC, | |
547 | UOPT_UUID, | |
548 | UOPT_HOMEHOST, | |
549 | UOPT_HOME_CLUSTER, | |
550 | UOPT_NODES, | |
551 | UOPT_DEVICESIZE, | |
552 | UOPT_BBL, | |
553 | UOPT_NO_BBL, | |
554 | UOPT_FORCE_NO_BBL, | |
555 | UOPT_METADATA, | |
556 | UOPT_REVERT_RESHAPE, | |
557 | UOPT_LAYOUT_ORIGINAL, | |
558 | UOPT_LAYOUT_ALTERNATE, | |
559 | UOPT_LAYOUT_UNSPECIFIED, | |
560 | UOPT_BYTEORDER, | |
561 | UOPT_HELP, | |
2257de10 MK |
562 | UOPT_USER_ONLY, |
563 | /* | |
564 | * Code specific options, cannot be set by the user | |
565 | */ | |
566 | UOPT_SPEC_FORCE_ONE, | |
567 | UOPT_SPEC_FORCE_ARRAY, | |
568 | UOPT_SPEC_ASSEMBLE, | |
569 | UOPT_SPEC_LINEAR_GROW_NEW, | |
570 | UOPT_SPEC_LINEAR_GROW_UPDATE, | |
571 | UOPT_SPEC__RESHAPE_PROGRESS, | |
572 | UOPT_SPEC_WRITEMOSTLY, | |
573 | UOPT_SPEC_READWRITE, | |
574 | UOPT_SPEC_FAILFAST, | |
575 | UOPT_SPEC_NOFAILFAST, | |
576 | UOPT_SPEC_REVERT_RESHAPE_NOBACKUP, | |
2568ce89 MK |
577 | UOPT_UNDEFINED |
578 | }; | |
579 | extern void fprint_update_options(FILE *outf, enum update_opt update_mode); | |
580 | ||
f0ec6710 MN |
581 | enum prefix_standard { |
582 | JEDEC, | |
583 | IEC | |
584 | }; | |
585 | ||
0aa2f15b GJ |
586 | enum bitmap_update { |
587 | NoUpdate, | |
588 | NameUpdate, | |
7e6e839a | 589 | NodeNumUpdate, |
0aa2f15b GJ |
590 | }; |
591 | ||
e22fe3ae N |
592 | enum flag_mode { |
593 | FlagDefault, FlagSet, FlagClear, | |
594 | }; | |
595 | ||
64c4757e | 596 | /* structures read from config file */ |
52826846 NB |
597 | /* List of mddevice names and identifiers |
598 | * Identifiers can be: | |
599 | * uuid=128-hex-uuid | |
600 | * super-minor=decimal-minor-number-from-superblock | |
601 | * devices=comma,separated,list,of,device,names,with,wildcards | |
602 | * | |
603 | * If multiple fields are present, the intersection of all matching | |
604 | * devices is considered | |
605 | */ | |
98c6faba | 606 | #define UnSet (0xfffe) |
fa56eddb | 607 | struct mddev_ident { |
dd0781e5 | 608 | char *devname; |
aba69144 | 609 | |
dd0781e5 | 610 | int uuid_set; |
3fa06e9d | 611 | int uuid[4]; |
67417d92 | 612 | char name[MD_NAME_MAX + 1]; |
52826846 | 613 | |
f21e18ca | 614 | int super_minor; |
52826846 | 615 | |
dd0781e5 | 616 | char *devices; /* comma separated list of device |
52826846 NB |
617 | * names with wild cards |
618 | */ | |
dd0781e5 | 619 | int level; |
f21e18ca N |
620 | int raid_disks; |
621 | int spare_disks; | |
82d9eba6 | 622 | struct supertype *st; |
dd0781e5 NB |
623 | int autof; /* 1 for normal, 2 for partitioned */ |
624 | char *spare_group; | |
7ef02d01 | 625 | char *bitmap_file; |
c82f047c | 626 | int bitmap_fd; |
dd0781e5 | 627 | |
1771a6e2 N |
628 | char *container; /* /dev/whatever name of container, or |
629 | * uuid of container. You would expect | |
630 | * this to be the 'devname' or UUID | |
dbb44303 N |
631 | * of some other entry. |
632 | */ | |
633 | char *member; /* subarray within a container */ | |
634 | ||
fa56eddb | 635 | struct mddev_ident *next; |
b179246f N |
636 | union { |
637 | /* fields needed by different users of this structure */ | |
638 | int assembled; /* set when assembly succeeds */ | |
639 | }; | |
fa56eddb | 640 | }; |
64c4757e | 641 | |
9e33d556 N |
642 | struct context { |
643 | int readonly; | |
644 | int runstop; | |
645 | int verbose; | |
9e33d556 | 646 | int brief; |
d11abe4b | 647 | int no_devices; |
9e33d556 N |
648 | int force; |
649 | char *homehost; | |
650 | int require_homehost; | |
651 | char *prefer; | |
652 | int export; | |
653 | int test; | |
654 | char *subarray; | |
3a87fa67 | 655 | enum update_opt update; |
9e33d556 N |
656 | int scan; |
657 | int SparcAdjust; | |
658 | int autof; | |
659 | int delay; | |
660 | int freeze_reshape; | |
661 | char *backup_file; | |
662 | int invalid_backup; | |
a740cf64 | 663 | char *action; |
529e2aa5 | 664 | int nodes; |
7716570e | 665 | char *homecluster; |
9e33d556 N |
666 | }; |
667 | ||
e705e81b N |
668 | struct shape { |
669 | int raiddisks; | |
670 | int sparedisks; | |
cc1799c3 | 671 | int journaldisks; |
e705e81b N |
672 | int level; |
673 | int layout; | |
674 | char *layout_str; | |
675 | int chunk; | |
676 | int bitmap_chunk; | |
677 | char *bitmap_file; | |
678 | int assume_clean; | |
577fd104 | 679 | bool write_zeroes; |
e705e81b N |
680 | int write_behind; |
681 | unsigned long long size; | |
ae5dfc56 | 682 | unsigned long long data_offset; |
5308f117 | 683 | int consistency_policy; |
e705e81b N |
684 | }; |
685 | ||
64c4757e | 686 | /* List of device names - wildcards expanded */ |
a655e550 | 687 | struct mddev_dev { |
64c4757e | 688 | char *devname; |
c8e1a230 N |
689 | int disposition; /* 'a' for add, 'r' for remove, 'f' for fail, |
690 | * 'A' for re_add. | |
cd29a5c8 NB |
691 | * Not set for names read from .config |
692 | */ | |
e22fe3ae N |
693 | enum flag_mode writemostly; |
694 | enum flag_mode failfast; | |
70c55e36 | 695 | int used; /* set when used */ |
72ca9bcf | 696 | long long data_offset; |
a655e550 N |
697 | struct mddev_dev *next; |
698 | }; | |
64c4757e | 699 | |
682c7051 NB |
700 | typedef struct mapping { |
701 | char *name; | |
702 | int num; | |
703 | } mapping_t; | |
704 | ||
e0d19036 | 705 | struct mdstat_ent { |
4dd2df09 | 706 | char devnm[32]; |
e0d19036 NB |
707 | int active; |
708 | char *level; | |
7054da69 | 709 | char *pattern; /* U for up, _ for down */ |
e0d19036 | 710 | int percent; /* -1 if no resync */ |
f94c116f | 711 | int resync; /* 3 if check, 2 if reshape, 1 if resync, 0 if recovery */ |
549e9569 NB |
712 | int devcnt; |
713 | int raid_disks; | |
549e9569 | 714 | char * metadata_version; |
3b57c466 N |
715 | struct dev_member { |
716 | char *name; | |
717 | struct dev_member *next; | |
1011e834 | 718 | } *members; |
e0d19036 NB |
719 | struct mdstat_ent *next; |
720 | }; | |
721 | ||
22a88995 | 722 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
a7a0d8a1 | 723 | extern void mdstat_close(void); |
e0d19036 | 724 | extern void free_mdstat(struct mdstat_ent *ms); |
cab9c67d | 725 | extern int mdstat_wait(int seconds); |
58a4ba2a | 726 | extern void mdstat_wait_fd(int fd, const sigset_t *sigmask); |
4dd2df09 | 727 | extern int mddev_busy(char *devnm); |
3b57c466 | 728 | extern struct mdstat_ent *mdstat_by_component(char *name); |
4dd2df09 | 729 | extern struct mdstat_ent *mdstat_by_subdev(char *subdev, char *container); |
8382f19b NB |
730 | |
731 | struct map_ent { | |
732 | struct map_ent *next; | |
4dd2df09 | 733 | char devnm[32]; |
1522c538 | 734 | char metadata[20]; |
8382f19b | 735 | int uuid[4]; |
195254b8 | 736 | int bad; |
8382f19b NB |
737 | char *path; |
738 | }; | |
4dd2df09 | 739 | extern int map_update(struct map_ent **mpp, char *devnm, char *metadata, |
8382f19b | 740 | int uuid[4], char *path); |
4dd2df09 | 741 | extern void map_remove(struct map_ent **map, char *devnm); |
8382f19b | 742 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); |
4dd2df09 | 743 | extern struct map_ent *map_by_devnm(struct map_ent **map, char *devnm); |
eb2306f8 | 744 | extern void map_free(struct map_ent *map); |
f2e55ecc | 745 | extern struct map_ent *map_by_name(struct map_ent **map, char *name); |
8382f19b NB |
746 | extern void map_read(struct map_ent **melp); |
747 | extern int map_write(struct map_ent *mel); | |
4dd2df09 | 748 | extern void map_delete(struct map_ent **mapp, char *devnm); |
8382f19b | 749 | extern void map_add(struct map_ent **melp, |
4dd2df09 | 750 | char *devnm, char *metadata, int uuid[4], char *path); |
ad5bc697 N |
751 | extern int map_lock(struct map_ent **melp); |
752 | extern void map_unlock(struct map_ent **melp); | |
cc700db3 | 753 | extern void map_fork(void); |
e0d19036 | 754 | |
e86c9dd6 | 755 | /* various details can be requested */ |
dab4a513 DW |
756 | enum sysfs_read_flags { |
757 | GET_LEVEL = (1 << 0), | |
758 | GET_LAYOUT = (1 << 1), | |
759 | GET_COMPONENT = (1 << 2), | |
760 | GET_CHUNK = (1 << 3), | |
761 | GET_CACHE = (1 << 4), | |
762 | GET_MISMATCH = (1 << 5), | |
763 | GET_VERSION = (1 << 6), | |
764 | GET_DISKS = (1 << 7), | |
dab4a513 | 765 | GET_SAFEMODE = (1 << 9), |
c0c1acd6 N |
766 | GET_BITMAP_LOCATION = (1 << 10), |
767 | ||
768 | GET_DEVS = (1 << 20), /* gets role, major, minor */ | |
769 | GET_OFFSET = (1 << 21), | |
770 | GET_SIZE = (1 << 22), | |
771 | GET_STATE = (1 << 23), | |
772 | GET_ERROR = (1 << 24), | |
5aa644c6 | 773 | GET_ARRAY_STATE = (1 << 25), |
5308f117 | 774 | GET_CONSISTENCY_POLICY = (1 << 26), |
ae7d61e3 | 775 | GET_DEVS_ALL = (1 << 27), |
dab4a513 | 776 | }; |
e86c9dd6 | 777 | |
90fd7001 MK |
778 | #define SYSFS_MAX_BUF_SIZE 64 |
779 | ||
14a86579 MT |
780 | extern void sysfs_get_container_devnm(struct mdinfo *mdi, char *buf); |
781 | ||
e86c9dd6 | 782 | /* If fd >= 0, get the array it is open on, |
4dd2df09 | 783 | * else use devnm. |
e86c9dd6 | 784 | */ |
4dd2df09 | 785 | extern int sysfs_open(char *devnm, char *devname, char *attr); |
dae13137 | 786 | extern int sysfs_init(struct mdinfo *mdi, int fd, char *devnm); |
a37563c9 | 787 | extern void sysfs_init_dev(struct mdinfo *mdi, dev_t devid); |
7e0f6979 | 788 | extern void sysfs_free(struct mdinfo *sra); |
4dd2df09 | 789 | extern struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options); |
1770662b DW |
790 | extern int sysfs_attr_match(const char *attr, const char *str); |
791 | extern int sysfs_match_word(const char *word, char **list); | |
7e0f6979 | 792 | extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 793 | char *name, char *val); |
7e0f6979 | 794 | extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 795 | char *name, unsigned long long val); |
012a8641 JS |
796 | extern int sysfs_set_num_signed(struct mdinfo *sra, struct mdinfo *dev, |
797 | char *name, long long val); | |
97590376 | 798 | extern int sysfs_uevent(struct mdinfo *sra, char *event); |
7236ee7a N |
799 | extern int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev, |
800 | char *name); | |
801 | extern int sysfs_fd_get_ll(int fd, unsigned long long *val); | |
7e0f6979 | 802 | extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 803 | char *name, unsigned long long *val); |
2eba8496 N |
804 | extern int sysfs_fd_get_two(int fd, unsigned long long *v1, unsigned long long *v2); |
805 | extern int sysfs_get_two(struct mdinfo *sra, struct mdinfo *dev, | |
806 | char *name, unsigned long long *v1, unsigned long long *v2); | |
7236ee7a | 807 | extern int sysfs_fd_get_str(int fd, char *val, int size); |
bc77ed53 DW |
808 | extern int sysfs_attribute_available(struct mdinfo *sra, struct mdinfo *dev, |
809 | char *name); | |
93ecfa01 N |
810 | extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
811 | char *name, char *val, int size); | |
8ed3e5e1 | 812 | extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms); |
f35f2525 | 813 | extern int sysfs_set_array(struct mdinfo *info, int vers); |
2904b26f | 814 | extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume); |
f1665f72 | 815 | extern int sysfs_disk_to_scsi_id(int fd, __u32 *id); |
4dd2df09 | 816 | extern int sysfs_unique_holder(char *devnm, long rdev); |
bc77ed53 | 817 | extern int sysfs_freeze_array(struct mdinfo *sra); |
efc67e8e | 818 | extern int sysfs_wait(int fd, int *msec); |
193b6c0b | 819 | extern int load_sys(char *path, char *buf, int len); |
b2514242 | 820 | extern int zero_disk_range(int fd, unsigned long long sector, size_t count); |
130994cb AK |
821 | extern int reshape_prepare_fdlist(char *devname, |
822 | struct mdinfo *sra, | |
823 | int raid_disks, | |
824 | int nrdisks, | |
825 | unsigned long blocks, | |
826 | char *backup_file, | |
827 | int *fdlist, | |
828 | unsigned long long *offsets); | |
829 | extern void reshape_free_fdlist(int *fdlist, | |
830 | unsigned long long *offsets, | |
831 | int size); | |
e6e9d47b AK |
832 | extern int reshape_open_backup_file(char *backup, |
833 | int fd, | |
834 | char *devname, | |
835 | long blocks, | |
836 | int *fdlist, | |
a93f87ee | 837 | unsigned long long *offsets, |
54ded86f | 838 | char *sysfs_name, |
a93f87ee | 839 | int restart); |
1c009fc2 AK |
840 | extern unsigned long compute_backup_blocks(int nchunk, int ochunk, |
841 | unsigned int ndata, unsigned int odata); | |
54ded86f N |
842 | extern char *locate_backup(char *name); |
843 | extern char *make_backup(char *name); | |
e86c9dd6 NB |
844 | |
845 | extern int save_stripes(int *source, unsigned long long *offsets, | |
846 | int raid_disks, int chunk_size, int level, int layout, | |
847 | int nwrites, int *dest, | |
a6288483 N |
848 | unsigned long long start, unsigned long long length, |
849 | char *buf); | |
353632d9 NB |
850 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
851 | int raid_disks, int chunk_size, int level, int layout, | |
852 | int source, unsigned long long read_offset, | |
2fcb75ae AK |
853 | unsigned long long start, unsigned long long length, |
854 | char *src_buf); | |
e86c9dd6 | 855 | |
52826846 NB |
856 | #ifndef Sendmail |
857 | #define Sendmail "/usr/lib/sendmail -t" | |
858 | #endif | |
859 | ||
773135f5 | 860 | #define SYSLOG_FACILITY LOG_DAEMON |
5f21d674 | 861 | extern char *map_num_s(mapping_t *map, int num); |
682c7051 NB |
862 | extern char *map_num(mapping_t *map, int num); |
863 | extern int map_name(mapping_t *map, char *name); | |
329dfc28 N |
864 | extern mapping_t r0layout[], r5layout[], r6layout[], |
865 | pers[], modes[], faultylayout[]; | |
2568ce89 | 866 | extern mapping_t consistency_policies[], sysfs_array_states[], update_options[]; |
682c7051 | 867 | |
c2ecf5f6 N |
868 | extern char *map_dev_preferred(int major, int minor, int create, |
869 | char *prefer); | |
870 | static inline char *map_dev(int major, int minor, int create) | |
871 | { | |
872 | return map_dev_preferred(major, minor, create, NULL); | |
873 | } | |
64c4757e | 874 | |
4389ce73 MT |
875 | /** |
876 | * is_fd_valid() - check file descriptor. | |
877 | * @fd: file descriptor. | |
878 | * | |
879 | * The function checks if @fd is nonnegative integer and shall be used only | |
880 | * to verify open() result. | |
881 | */ | |
882 | static inline int is_fd_valid(int fd) | |
883 | { | |
884 | return (fd > -1); | |
885 | } | |
886 | ||
70f1ff42 LF |
887 | /** |
888 | * is_level456() - check whether given level is between inclusive 4 and 6. | |
889 | * @level: level to check. | |
890 | * | |
891 | * Return: true if condition is met, false otherwise | |
892 | */ | |
893 | static inline bool is_level456(int level) | |
894 | { | |
895 | return (level >= 4 && level <= 6); | |
896 | } | |
897 | ||
4389ce73 MT |
898 | /** |
899 | * close_fd() - verify, close and unset file descriptor. | |
900 | * @fd: pointer to file descriptor. | |
901 | * | |
902 | * The function closes and invalidates file descriptor if appropriative. It | |
903 | * ignores incorrect file descriptor quitely to simplify error handling. | |
904 | */ | |
905 | static inline void close_fd(int *fd) | |
906 | { | |
907 | if (is_fd_valid(*fd) && close(*fd) == 0) | |
908 | *fd = -1; | |
909 | } | |
910 | ||
549e9569 | 911 | struct active_array; |
2e735d19 | 912 | struct metadata_update; |
64c4757e | 913 | |
80bf9135 | 914 | /* 'struct reshape' records the intermediate states of |
999b4972 N |
915 | * a general reshape. |
916 | * The starting geometry is converted to the 'before' geometry | |
917 | * by at most an atomic level change. They could be the same. | |
918 | * Similarly the 'after' geometry is converted to the final | |
919 | * geometry by at most a level change. | |
920 | * Note that 'before' and 'after' must have the same level. | |
921 | * 'blocks' is the minimum number of sectors for a reshape unit. | |
922 | * This will be a multiple of the stripe size in each of the | |
923 | * 'before' and 'after' geometries. | |
924 | * If 'blocks' is 0, no restriping is necessary. | |
89ecd3cf N |
925 | * 'min_offset_change' is the minimum change to data_offset to |
926 | * allow the reshape to happen. It is at least the larger of | |
927 | * the old and new chunk sizes, and typically the same as 'blocks' | |
928 | * divided by number of data disks. | |
999b4972 N |
929 | */ |
930 | struct reshape { | |
931 | int level; | |
932 | int parity; /* number of parity blocks/devices */ | |
933 | struct { | |
934 | int layout; | |
935 | int data_disks; | |
936 | } before, after; | |
937 | unsigned long long backup_blocks; | |
89ecd3cf | 938 | unsigned long long min_offset_change; |
999b4972 N |
939 | unsigned long long stripes; /* number of old stripes that comprise 'blocks'*/ |
940 | unsigned long long new_size; /* New size of array in sectors */ | |
941 | }; | |
942 | ||
1fef0c6f MT |
943 | /** |
944 | * struct dev_policy - Data structure for policy management. | |
945 | * @next: pointer to next dev_policy. | |
946 | * @name: policy name, category. | |
947 | * @metadata: the metadata type it affects. | |
948 | * @value: value of the policy. | |
949 | * | |
950 | * The functions to manipulate dev_policy lists do not free elements, so they must be statically | |
951 | * allocated. @name and @metadata can be compared by address. | |
952 | */ | |
953 | typedef struct dev_policy { | |
954 | struct dev_policy *next; | |
955 | char *name; | |
956 | const char *metadata; | |
957 | const char *value; | |
958 | } dev_policy_t; | |
959 | ||
7054da69 | 960 | /* A superswitch provides entry point to a metadata handler. |
6adfd3af | 961 | * |
74db60b0 | 962 | * The superswitch primarily operates on some "metadata" that |
6adfd3af NB |
963 | * is accessed via the 'supertype'. |
964 | * This metadata has one of three possible sources. | |
965 | * 1/ It is read from a single device. In this case it may not completely | |
966 | * describe the array or arrays as some information might be on other | |
967 | * devices. | |
968 | * 2/ It is read from all devices in a container. In this case all | |
969 | * information is present. | |
970 | * 3/ It is created by ->init_super / ->add_to_super. In this case it will | |
971 | * be complete once enough ->add_to_super calls have completed. | |
972 | * | |
973 | * When creating an array inside a container, the metadata will be | |
974 | * formed by a combination of 2 and 3. The metadata or the array is read, | |
975 | * then new information is added. | |
976 | * | |
977 | * The metadata must sometimes have a concept of a 'current' array | |
978 | * and a 'current' device. | |
979 | * The 'current' array is set by init_super to be the newly created array, | |
980 | * or is set by super_by_fd when it finds it is looking at an array inside | |
981 | * a container. | |
982 | * | |
983 | * The 'current' device is either the device that the metadata was read from | |
984 | * in case 1, or the last device added by add_to_super in case 3. | |
985 | * Case 2 does not identify a 'current' device. | |
986 | */ | |
f9ce90ba | 987 | extern struct superswitch { |
6adfd3af NB |
988 | |
989 | /* Used to report details of metadata read from a component | |
990 | * device. ->load_super has been called. | |
991 | */ | |
3da92f27 | 992 | void (*examine_super)(struct supertype *st, char *homehost); |
061f2c6a | 993 | void (*brief_examine_super)(struct supertype *st, int verbose); |
4737ae25 | 994 | void (*brief_examine_subarrays)(struct supertype *st, int verbose); |
0d726f17 | 995 | void (*export_examine_super)(struct supertype *st); |
6d388a88 | 996 | int (*examine_badblocks)(struct supertype *st, int fd, char *devname); |
74db60b0 | 997 | int (*copy_metadata)(struct supertype *st, int from, int to); |
6adfd3af NB |
998 | |
999 | /* Used to report details of an active array. | |
1000 | * ->load_super was possibly given a 'component' string. | |
1001 | */ | |
b771faef BK |
1002 | void (*detail_super)(struct supertype *st, char *homehost, |
1003 | char *subarray); | |
1004 | void (*brief_detail_super)(struct supertype *st, char *subarray); | |
0d726f17 | 1005 | void (*export_detail_super)(struct supertype *st); |
6adfd3af | 1006 | |
4cce4069 | 1007 | /* Optional: platform hardware / firmware details */ |
9eafa1de MN |
1008 | int (*detail_platform)(int verbose, int enumerate_only, char *controller_path); |
1009 | int (*export_detail_platform)(int verbose, char *controller_path); | |
4cce4069 | 1010 | |
6adfd3af NB |
1011 | /* Used: |
1012 | * to get uuid to storing in bitmap metadata | |
1013 | * and 'reshape' backup-data metadata | |
1014 | * To see if a device is being re-added to an array it was part of. | |
1015 | */ | |
3da92f27 | 1016 | void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
6adfd3af | 1017 | |
8592f29d | 1018 | /* Extract generic details from metadata. This could be details about |
6adfd3af NB |
1019 | * the container, or about an individual array within the container. |
1020 | * The determination is made either by: | |
1021 | * load_super being given a 'component' string. | |
1022 | * validate_geometry determining what to create. | |
d2ca6449 NB |
1023 | * The info includes both array information and device information. |
1024 | * The particular device should be: | |
1025 | * The last device added by add_to_super | |
1026 | * The device the metadata was loaded from by load_super | |
a5d85af7 N |
1027 | * If 'map' is present, then it is an array raid_disks long |
1028 | * (raid_disk must already be set and correct) and it is filled | |
1029 | * with 1 for slots that are thought to be active and 0 for slots which | |
1030 | * appear to be failed/missing. | |
95eeceeb | 1031 | * *info is zeroed out before data is added. |
6adfd3af | 1032 | */ |
a5d85af7 | 1033 | void (*getinfo_super)(struct supertype *st, struct mdinfo *info, char *map); |
5c4cd5da | 1034 | struct mdinfo *(*getinfo_super_disks)(struct supertype *st); |
6adfd3af | 1035 | /* Check if the given metadata is flagged as belonging to "this" |
9362c1c8 | 1036 | * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost" |
6adfd3af | 1037 | */ |
3da92f27 | 1038 | int (*match_home)(struct supertype *st, char *homehost); |
6adfd3af NB |
1039 | |
1040 | /* Make one of several generic modifications to metadata | |
1041 | * prior to assembly (or other times). | |
1042 | * sparc2.2 - first bug in early 0.90 metadata | |
1043 | * super-minor - change name of 0.90 metadata | |
1044 | * summaries - 'correct' any redundant data | |
1045 | * resync - mark array as dirty to trigger a resync. | |
1046 | * uuid - set new uuid - only 0.90 or 1.x | |
1047 | * name - change the name of the array (where supported) | |
1048 | * homehost - change which host this array is tied to. | |
1049 | * devicesize - If metadata is at start of device, change recorded | |
1050 | * device size to match actual device size | |
1051 | * byteorder - swap bytes for 0.90 metadata | |
1052 | * | |
1053 | * force-one - mark that device as uptodate, not old or failed. | |
1054 | * force-array - mark array as clean if it would not otherwise | |
1055 | * assemble | |
1056 | * assemble - not sure how this is different from force-one... | |
1057 | * linear-grow-new - add a new device to a linear array, but don't | |
1058 | * change the size: so superblock still matches | |
1059 | * linear-grow-update - now change the size of the array. | |
16715c01 DL |
1060 | * writemostly - set the WriteMostly1 bit in the superblock devflags |
1061 | * readwrite - clear the WriteMostly1 bit in the superblock devflags | |
71574efb N |
1062 | * failfast - set the FailFast1 bit in the superblock |
1063 | * nofailfast - clear the FailFast1 bit | |
199f1a1f N |
1064 | * no-bitmap - clear any record that a bitmap is present. |
1065 | * bbl - add a bad-block-log if possible | |
6dd16dac N |
1066 | * no-bbl - remove any bad-block-log is it is empty. |
1067 | * force-no-bbl - remove any bad-block-log even if empty. | |
199f1a1f N |
1068 | * revert-reshape - If a reshape is in progress, modify metadata so |
1069 | * it will resume going in the opposite direction. | |
6adfd3af | 1070 | */ |
68c7d6d7 | 1071 | int (*update_super)(struct supertype *st, struct mdinfo *info, |
03312b52 | 1072 | enum update_opt update, |
e5eac01f NB |
1073 | char *devname, int verbose, |
1074 | int uuid_set, char *homehost); | |
6adfd3af NB |
1075 | |
1076 | /* Create new metadata for new array as described. This could | |
1077 | * be a new container, or an array in a pre-existing container. | |
1078 | * Also used to zero metadata prior to writing it to invalidate old | |
1079 | * metadata. | |
1080 | */ | |
3da92f27 | 1081 | int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
5308f117 | 1082 | struct shape *s, char *name, |
83cd1e97 N |
1083 | char *homehost, int *uuid, |
1084 | unsigned long long data_offset); | |
6adfd3af NB |
1085 | |
1086 | /* update the metadata to include new device, either at create or | |
1087 | * when hot-adding a spare. | |
1088 | */ | |
f20c3968 | 1089 | int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
72ca9bcf N |
1090 | int fd, char *devname, |
1091 | unsigned long long data_offset); | |
1a64be56 LM |
1092 | /* update the metadata to delete a device, |
1093 | * when hot-removing. | |
1094 | */ | |
1095 | int (*remove_from_super)(struct supertype *st, mdu_disk_info_t *dinfo); | |
6adfd3af NB |
1096 | |
1097 | /* Write metadata to one device when fixing problems or adding | |
1098 | * a new device. | |
1099 | */ | |
3da92f27 | 1100 | int (*store_super)(struct supertype *st, int fd); |
6adfd3af NB |
1101 | |
1102 | /* Write all metadata for this array. | |
1103 | */ | |
111d01fc | 1104 | int (*write_init_super)(struct supertype *st); |
e2f408a4 N |
1105 | /* Check if metadata read from one device is compatible with an array, |
1106 | * used when assembling an array, or pseudo-assembling was with | |
1107 | * "--examine --brief" | |
1108 | * If "st" has not yet been loaded the superblock from, "tst" is | |
1109 | * moved in, otherwise the superblock in 'st' is compared with | |
1110 | * 'tst'. | |
1111 | */ | |
c7b8547c MT |
1112 | int (*compare_super)(struct supertype *st, struct supertype *tst, |
1113 | int verbose); | |
e2f408a4 N |
1114 | /* Load metadata from a single device. If 'devname' is not NULL |
1115 | * print error messages as appropriate */ | |
3da92f27 | 1116 | int (*load_super)(struct supertype *st, int fd, char *devname); |
e2f408a4 N |
1117 | /* 'fd' is a 'container' md array - load array metadata from the |
1118 | * whole container. | |
1119 | */ | |
2b959fbf | 1120 | int (*load_container)(struct supertype *st, int fd, char *devname); |
e2f408a4 N |
1121 | /* If 'arg' is a valid name of this metadata type, allocate and |
1122 | * return a 'supertype' for the particular minor version */ | |
82d9eba6 | 1123 | struct supertype * (*match_metadata_desc)(char *arg); |
e2f408a4 N |
1124 | /* If a device has the given size, and the data_offset has been |
1125 | * requested - work out how much space is available for data. | |
1126 | * This involves adjusting for reserved space (e.g. bitmaps) | |
1127 | * and for any rounding. | |
1128 | * 'mdadm' only calls this for existing arrays where a possible | |
1129 | * spare is being added. However some super-handlers call it | |
1130 | * internally from validate_geometry when creating an array. | |
1131 | */ | |
387fcd59 N |
1132 | __u64 (*avail_size)(struct supertype *st, __u64 size, |
1133 | unsigned long long data_offset); | |
fbfdcb06 AO |
1134 | /* |
1135 | * Return spare criteria for array: | |
1136 | * - minimum disk size can be used in array; | |
4b57ecf6 | 1137 | * - sector size can be used in array. |
e2f408a4 | 1138 | */ |
f6562011 MT |
1139 | mdadm_status_t (*get_spare_criteria)(struct supertype *st, char *mddev_path, |
1140 | struct spare_criteria *sc); | |
e2f408a4 N |
1141 | /* Find somewhere to put a bitmap - possibly auto-size it - and |
1142 | * update the metadata to record this. The array may be newly | |
1143 | * created, in which case data_size may be updated, or it might | |
1144 | * already exist. Metadata handler can know if init_super | |
1145 | * has been called, but not write_init_super. | |
2ec2b7e9 JS |
1146 | * 0: Success |
1147 | * -Exxxx: On error | |
e2f408a4 | 1148 | */ |
3da92f27 | 1149 | int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
199171a2 | 1150 | int delay, int write_behind, |
f9c25f1d | 1151 | unsigned long long size, int may_change, int major); |
b554ab5c JR |
1152 | /* Perform additional setup required to activate a bitmap. |
1153 | */ | |
1154 | int (*set_bitmap)(struct supertype *st, struct mdinfo *info); | |
e2f408a4 N |
1155 | /* Seek 'fd' to start of write-intent-bitmap. Must be an |
1156 | * md-native format bitmap | |
1157 | */ | |
b138214f | 1158 | int (*locate_bitmap)(struct supertype *st, int fd, int node_num); |
e2f408a4 N |
1159 | /* if add_internal_bitmap succeeded for existing array, this |
1160 | * writes it out. | |
1161 | */ | |
0aa2f15b | 1162 | int (*write_bitmap)(struct supertype *st, int fd, enum bitmap_update update); |
e2f408a4 | 1163 | /* Free the superblock and any other allocated data */ |
3da92f27 | 1164 | void (*free_super)(struct supertype *st); |
78e44928 NB |
1165 | |
1166 | /* validate_geometry is called with an st returned by | |
1167 | * match_metadata_desc. | |
e2f408a4 | 1168 | * It should check that the geometry described is compatible with |
78e44928 NB |
1169 | * the metadata type. It will be called repeatedly as devices |
1170 | * added to validate changing size and new devices. If there are | |
1171 | * inter-device dependencies, it should record sufficient details | |
1172 | * so these can be validated. | |
30f58b22 | 1173 | * Both 'size' and '*freesize' are in sectors. chunk is KiB. |
ecbd9e81 N |
1174 | * Return value is: |
1175 | * 1: everything is OK | |
1176 | * 0: not OK for some reason - if 'verbose', then error was reported. | |
1177 | * -1: st->sb was NULL, 'subdev' is a member of a container of this | |
e2f408a4 | 1178 | * type, but array is not acceptable for some reason |
ecbd9e81 | 1179 | * message was reported even if verbose is 0. |
78e44928 | 1180 | */ |
17f25ca6 NB |
1181 | int (*validate_geometry)(struct supertype *st, int level, int layout, |
1182 | int raiddisks, | |
c21e737b | 1183 | int *chunk, unsigned long long size, |
af4348dd | 1184 | unsigned long long data_offset, |
2c514b71 | 1185 | char *subdev, unsigned long long *freesize, |
5308f117 | 1186 | int consistency_policy, int verbose); |
598f0d58 | 1187 | |
1fef0c6f MT |
1188 | /** |
1189 | * test_and_add_drive_policies() - test new and add custom policies from metadata handler. | |
1190 | * @pols: list of currently recorded policies. | |
1191 | * @disk_fd: file descriptor of the device to check. | |
1192 | * @verbose: verbose flag. | |
1193 | * | |
1194 | * Used by IMSM to verify all drives in container/array, against requirements not recored | |
1195 | * in superblock, like controller type for IMSM. It should check all drives even if | |
1196 | * they are not actually used, because mdmon or kernel are free to use any drive assigned to | |
1197 | * container automatically. | |
1198 | * | |
1199 | * Generating and comparison methods belong to metadata handler. It is not mandatory to be | |
1200 | * implemented. | |
1201 | * | |
1202 | * Return: MDADM_STATUS_SUCCESS is expected on success. | |
1203 | */ | |
1204 | mdadm_status_t (*test_and_add_drive_policies)(dev_policy_t **pols, int disk_fd, | |
1205 | const int verbose); | |
1206 | ||
e2f408a4 N |
1207 | /* Return a linked list of 'mdinfo' structures for all arrays |
1208 | * in the container. For non-containers, it is like | |
1209 | * getinfo_super with an allocated mdinfo.*/ | |
00bbdbda | 1210 | struct mdinfo *(*container_content)(struct supertype *st, char *subarray); |
30f58b22 DW |
1211 | /* query the supertype for default geometry */ |
1212 | void (*default_geometry)(struct supertype *st, int *level, int *layout, int *chunk); /* optional */ | |
33414a01 | 1213 | /* Permit subarray's to be deleted from inactive containers */ |
3364781b BK |
1214 | int (*kill_subarray)(struct supertype *st, |
1215 | char *subarray_id); /* optional */ | |
03312b52 MK |
1216 | /** |
1217 | * update_subarray() - Permit subarray to be modified. | |
1218 | * @st: Supertype. | |
1219 | * @subarray: Subarray name. | |
1220 | * @update: Update option. | |
1221 | * @ident: Optional identifiers. | |
1222 | */ | |
a951a4f7 | 1223 | int (*update_subarray)(struct supertype *st, char *subarray, |
03312b52 | 1224 | enum update_opt update, struct mddev_ident *ident); |
7bc71196 DW |
1225 | /* Check if reshape is supported for this external format. |
1226 | * st is obtained from super_by_fd() where st->subarray[0] is | |
1227 | * initialized to indicate if reshape is being performed at the | |
1228 | * container or subarray level | |
1229 | */ | |
016e00f5 AK |
1230 | #define APPLY_METADATA_CHANGES 1 |
1231 | #define ROLLBACK_METADATA_CHANGES 0 | |
1232 | ||
d04f65f4 N |
1233 | int (*reshape_super)(struct supertype *st, |
1234 | unsigned long long size, int level, | |
7bc71196 | 1235 | int layout, int chunksize, int raid_disks, |
41784c88 | 1236 | int delta_disks, char *backup, char *dev, |
016e00f5 | 1237 | int direction, |
41784c88 | 1238 | int verbose); /* optional */ |
999b4972 N |
1239 | int (*manage_reshape)( /* optional */ |
1240 | int afd, struct mdinfo *sra, struct reshape *reshape, | |
1241 | struct supertype *st, unsigned long blocks, | |
1242 | int *fds, unsigned long long *offsets, | |
1243 | int dests, int *destfd, unsigned long long *destoffsets); | |
598f0d58 | 1244 | |
549e9569 | 1245 | /* for mdmon */ |
cba0191b | 1246 | int (*open_new)(struct supertype *c, struct active_array *a, |
60815698 | 1247 | int inst); |
ed9d66aa NB |
1248 | |
1249 | /* Tell the metadata handler the current state of the array. | |
1250 | * This covers whether it is known to be consistent (no pending writes) | |
01f157d7 | 1251 | * and how far along a resync is known to have progressed |
ed9d66aa NB |
1252 | * (in a->resync_start). |
1253 | * resync status is really irrelevant if the array is not consistent, | |
1254 | * but some metadata (DDF!) have a place to record the distinction. | |
1011e834 | 1255 | * If 'consistent' is '2', then the array can mark it dirty if a |
01f157d7 N |
1256 | * resync/recovery/whatever is required, or leave it clean if not. |
1257 | * Return value is 0 dirty (not consistent) and 1 if clean. | |
1258 | * it is only really important if consistent is passed in as '2'. | |
4e5528c6 | 1259 | */ |
01f157d7 | 1260 | int (*set_array_state)(struct active_array *a, int consistent); |
7a7cc504 NB |
1261 | |
1262 | /* When the state of a device might have changed, we call set_disk to | |
1263 | * tell the metadata what the current state is. | |
1264 | * Typically this happens on spare->in_sync and (spare|in_sync)->faulty | |
1265 | * transitions. | |
1266 | * set_disk might be called when the state of the particular disk has | |
1267 | * not in fact changed. | |
1268 | */ | |
8d45d196 | 1269 | void (*set_disk)(struct active_array *a, int n, int state); |
2e735d19 NB |
1270 | void (*sync_metadata)(struct supertype *st); |
1271 | void (*process_update)(struct supertype *st, | |
1272 | struct metadata_update *update); | |
5fe6f031 N |
1273 | /* Prepare updates allocates extra memory that might be |
1274 | * needed. If the update cannot be understood, return 0. | |
1275 | */ | |
1276 | int (*prepare_update)(struct supertype *st, | |
edd8d13c | 1277 | struct metadata_update *update); |
549e9569 | 1278 | |
6c3fb95c NB |
1279 | /* activate_spare will check if the array is degraded and, if it |
1280 | * is, try to find some spare space in the container. | |
1281 | * On success, it add appropriate updates (For process_update) to | |
1282 | * to the 'updates' list and returns a list of 'mdinfo' identifying | |
1283 | * the device, or devices as there might be multiple missing | |
1284 | * devices and multiple spares available. | |
1285 | */ | |
1286 | struct mdinfo *(*activate_spare)(struct active_array *a, | |
1287 | struct metadata_update **updates); | |
2cda7640 ML |
1288 | /* |
1289 | * Return statically allocated string that represents metadata specific | |
1290 | * controller domain of the disk. The domain is used in disk domain | |
1291 | * matching functions. Disks belong to the same domain if the they have | |
1292 | * the same domain from mdadm.conf and belong the same metadata domain. | |
1293 | * Returning NULL or not providing this handler means that metadata | |
1294 | * does not distinguish the differences between disks that belong to | |
1295 | * different controllers. They are in the domain specified by | |
1296 | * configuration file (mdadm.conf). | |
1297 | * In case when the metadata has the notion of domains based on disk | |
1298 | * it shall return NULL for disks that do not belong to the controller | |
1299 | * the supported domains. Such disks will form another domain and won't | |
1300 | * be mixed with supported ones. | |
1301 | */ | |
1302 | const char *(*get_disk_controller_domain)(const char *path); | |
549e9569 | 1303 | |
ba53ea59 AK |
1304 | /* for external backup area */ |
1305 | int (*recover_backup)(struct supertype *st, struct mdinfo *info); | |
1306 | ||
0c21b485 PB |
1307 | /* validate container after assemble */ |
1308 | int (*validate_container)(struct mdinfo *info); | |
1309 | ||
5308f117 AP |
1310 | /* write initial empty PPL on device */ |
1311 | int (*write_init_ppl)(struct supertype *st, struct mdinfo *info, int fd); | |
1312 | ||
2432ce9b AP |
1313 | /* validate ppl before assemble */ |
1314 | int (*validate_ppl)(struct supertype *st, struct mdinfo *info, | |
1315 | struct mdinfo *disk); | |
1316 | ||
1ab97c97 TM |
1317 | /* records new bad block in metadata */ |
1318 | int (*record_bad_block)(struct active_array *a, int n, | |
1319 | unsigned long long sector, int length); | |
1320 | ||
42d902d9 TM |
1321 | /* clears bad block from metadata */ |
1322 | int (*clear_bad_block)(struct active_array *a, int n, | |
1323 | unsigned long long sector, int length); | |
1324 | ||
1325 | /* get list of bad blocks from metadata */ | |
1326 | struct md_bb *(*get_bad_blocks)(struct active_array *a, int n); | |
1327 | ||
f277ce36 | 1328 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
d03373f1 | 1329 | int external; |
4cce4069 | 1330 | const char *name; /* canonical metadata name */ |
0f22b998 | 1331 | } *superlist[]; |
82d9eba6 | 1332 | |
0f22b998 N |
1333 | extern struct superswitch super0, super1; |
1334 | extern struct superswitch super_imsm, super_ddf; | |
0592faeb | 1335 | extern struct superswitch mbr, gpt; |
cdddbdbc | 1336 | |
420dafcd N |
1337 | void imsm_set_no_platform(int v); |
1338 | ||
edd8d13c NB |
1339 | struct metadata_update { |
1340 | int len; | |
1341 | char *buf; | |
1342 | void *space; /* allocated space that monitor will use */ | |
cb23f1f4 N |
1343 | void **space_list; /* list of allocated spaces that monitor can |
1344 | * use or that it returned. | |
1345 | */ | |
edd8d13c NB |
1346 | struct metadata_update *next; |
1347 | }; | |
1348 | ||
6adfd3af NB |
1349 | /* A supertype holds a particular collection of metadata. |
1350 | * It identifies the metadata type by the superswitch, and the particular | |
1351 | * sub-version of that metadata type. | |
1352 | * metadata read in or created is stored in 'sb' and 'info'. | |
1353 | * There are also fields used by mdmon to track containers. | |
1354 | * | |
352452c3 N |
1355 | * A supertype may refer to: |
1356 | * Just an array, possibly in a container | |
1357 | * A container, not identifying any particular array | |
1358 | * Info read from just one device, not yet fully describing the array/container. | |
1359 | * | |
1360 | * | |
6adfd3af NB |
1361 | * A supertype is created by: |
1362 | * super_by_fd | |
1363 | * guess_super | |
1364 | * dup_super | |
1365 | */ | |
82d9eba6 NB |
1366 | struct supertype { |
1367 | struct superswitch *ss; | |
1368 | int minor_version; | |
ea329559 | 1369 | int max_devs; |
4dd2df09 | 1370 | char container_devnm[32]; /* devnm of container */ |
64557c33 | 1371 | void *sb; |
111d01fc | 1372 | void *info; |
afa368f4 N |
1373 | void *other; /* Hack used to convert v0.90 to v1.0 */ |
1374 | unsigned long long devsize; | |
23bf42cc | 1375 | unsigned long long data_offset; /* used by v1.x only */ |
df3346e6 LM |
1376 | int ignore_hw_compat; /* used to inform metadata handlers that it should ignore |
1377 | HW/firmware related incompatability to load metadata. | |
1378 | Used when examining metadata to display content of disk | |
1379 | when user has no hw/firmare compatible system. | |
1380 | */ | |
edd8d13c NB |
1381 | struct metadata_update *updates; |
1382 | struct metadata_update **update_tail; | |
1383 | ||
549e9569 NB |
1384 | /* extra stuff used by mdmon */ |
1385 | struct active_array *arrays; | |
549e9569 | 1386 | int sock; /* listen to external programs */ |
4dd2df09 N |
1387 | char devnm[32]; /* e.g. md0. This appears in metadata_version: |
1388 | * external:/md0/12 | |
1389 | */ | |
549e9569 | 1390 | int devcnt; |
68226a80 | 1391 | int retry_soon; |
529e2aa5 | 1392 | int nodes; |
7716570e | 1393 | char *cluster_name; |
549e9569 NB |
1394 | |
1395 | struct mdinfo *devs; | |
1396 | ||
82d9eba6 | 1397 | }; |
f9ce90ba | 1398 | |
4725bc31 | 1399 | extern struct supertype *super_by_fd(int fd, char **subarray); |
54887ad8 N |
1400 | enum guess_types { guess_any, guess_array, guess_partitions }; |
1401 | extern struct supertype *guess_super_type(int fd, enum guess_types guess_type); | |
1402 | static inline struct supertype *guess_super(int fd) { | |
1403 | return guess_super_type(fd, guess_any); | |
1404 | } | |
3da92f27 | 1405 | extern struct supertype *dup_super(struct supertype *st); |
beae1dfe | 1406 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
32971509 | 1407 | extern int get_dev_sector_size(int fd, char *dname, unsigned int *sectsizep); |
3a371610 | 1408 | extern int must_be_container(int fd); |
a7c6e3fb | 1409 | void wait_for(char *dev, int fd); |
f9ce90ba | 1410 | |
4e8d9f0a | 1411 | extern char pol_act[], pol_domain[], pol_metadata[], pol_auto[]; |
5527fc74 N |
1412 | |
1413 | /* iterate over the sublist starting at list, having the same | |
1414 | * 'name' as 'list', and matching the given metadata (Where | |
1415 | * NULL matches anything | |
1416 | */ | |
1417 | #define pol_for_each(item, list, _metadata) \ | |
1418 | for (item = list; \ | |
1419 | item && item->name == list->name; \ | |
1420 | item = item->next) \ | |
1421 | if (!(!_metadata || !item->metadata || _metadata == item->metadata)) \ | |
1422 | ; else | |
1423 | ||
1424 | /* | |
1425 | * policy records read from mdadm are largely just name-value pairs. | |
1426 | * The names are constants, not strdupped | |
1427 | */ | |
1428 | struct pol_rule { | |
1429 | struct pol_rule *next; | |
1430 | char *type; /* rule_policy or rule_part */ | |
1431 | struct rule { | |
1432 | struct rule *next; | |
1433 | char *name; | |
1434 | char *value; | |
1435 | char *dups; /* duplicates of 'value' with a partNN appended */ | |
1436 | } *rule; | |
1437 | }; | |
1438 | ||
1439 | extern char rule_policy[], rule_part[]; | |
1440 | extern char rule_path[], rule_type[]; | |
1441 | extern char type_part[], type_disk[]; | |
1442 | ||
1443 | extern void policyline(char *line, char *type); | |
4e8d9f0a | 1444 | extern void policy_add(char *type, ...); |
5527fc74 N |
1445 | extern void policy_free(void); |
1446 | ||
cd72f9d1 | 1447 | extern struct dev_policy *path_policy(char **paths, char *type); |
5527fc74 | 1448 | extern struct dev_policy *disk_policy(struct mdinfo *disk); |
4dd2df09 | 1449 | extern struct dev_policy *devid_policy(int devid); |
5527fc74 N |
1450 | extern void dev_policy_free(struct dev_policy *p); |
1451 | ||
e78dda3b | 1452 | extern void pol_add(struct dev_policy **pol, char *name, char *val, char *metadata); |
5527fc74 N |
1453 | extern struct dev_policy *pol_find(struct dev_policy *pol, char *name); |
1454 | ||
5a2e194c MT |
1455 | extern mdadm_status_t drive_test_and_add_policies(struct supertype *st, dev_policy_t **pols, |
1456 | int fd, const int verbose); | |
1457 | extern mdadm_status_t sysfs_test_and_add_drive_policies(struct supertype *st, dev_policy_t **pols, | |
1458 | struct mdinfo *mdi, const int verbose); | |
1459 | extern mdadm_status_t mddev_test_and_add_drive_policies(struct supertype *st, dev_policy_t **pols, | |
1460 | int array_fd, const int verbose); | |
1461 | ||
e3bb5f14 N |
1462 | enum policy_action { |
1463 | act_default, | |
1464 | act_include, | |
1465 | act_re_add, | |
d2db3045 N |
1466 | act_spare, /* This only applies to bare devices */ |
1467 | act_spare_same_slot, /* this allows non-bare devices, | |
1468 | * but only if recent removal */ | |
1469 | act_force_spare, /* this allow non-bare devices in any case */ | |
e3bb5f14 N |
1470 | act_err |
1471 | }; | |
1472 | ||
1473 | extern int policy_action_allows(struct dev_policy *plist, const char *metadata, | |
1474 | enum policy_action want); | |
1475 | extern int disk_action_allows(struct mdinfo *disk, const char *metadata, | |
1476 | enum policy_action want); | |
f5f12c84 N |
1477 | |
1478 | struct domainlist { | |
1479 | struct domainlist *next; | |
2cda7640 | 1480 | const char *dom; |
f5f12c84 N |
1481 | }; |
1482 | ||
1483 | extern int domain_test(struct domainlist *dom, struct dev_policy *pol, | |
1484 | const char *metadata); | |
1485 | extern struct domainlist *domain_from_array(struct mdinfo *mdi, | |
1486 | const char *metadata); | |
4dd2df09 | 1487 | extern void domainlist_add_dev(struct domainlist **dom, int devid, |
e78dda3b | 1488 | const char *metadata); |
f5f12c84 N |
1489 | extern void domain_free(struct domainlist *dl); |
1490 | extern void domain_merge(struct domainlist **domp, struct dev_policy *pol, | |
1491 | const char *metadata); | |
e78dda3b | 1492 | void domain_add(struct domainlist **domp, char *domain); |
f5f12c84 | 1493 | |
403410eb PC |
1494 | extern void policy_save_path(char *id_path, struct map_ent *array); |
1495 | extern int policy_check_path(struct mdinfo *disk, struct map_ent *array); | |
1496 | ||
b0681598 MD |
1497 | extern void sysfs_rules_apply(char *devnm, struct mdinfo *dev); |
1498 | extern void sysfsline(char *line); | |
1499 | ||
838acbc2 NB |
1500 | #if __GNUC__ < 3 |
1501 | struct stat64; | |
1502 | #endif | |
1503 | ||
45e878bb NB |
1504 | #define HAVE_NFTW we assume |
1505 | #define HAVE_FTW | |
1506 | ||
2df1f269 | 1507 | #ifdef __UCLIBC__ |
45e878bb | 1508 | # include <features.h> |
2df1f269 BRF |
1509 | # ifndef __UCLIBC_HAS_LFS__ |
1510 | # define lseek64 lseek | |
1511 | # endif | |
45e878bb NB |
1512 | # ifndef __UCLIBC_HAS_FTW__ |
1513 | # undef HAVE_FTW | |
1514 | # undef HAVE_NFTW | |
1515 | # endif | |
1516 | #endif | |
1517 | ||
1518 | #ifdef __dietlibc__ | |
1519 | # undef HAVE_NFTW | |
1520 | #endif | |
1521 | ||
e39b673e | 1522 | #if defined(__KLIBC__) |
1523 | # undef HAVE_NFTW | |
1524 | # undef HAVE_FTW | |
1525 | #endif | |
1526 | ||
45e878bb | 1527 | #ifndef HAVE_NFTW |
173fc515 | 1528 | # define FTW_PHYS 1 |
45e878bb NB |
1529 | # ifndef HAVE_FTW |
1530 | struct FTW {}; | |
173fc515 NB |
1531 | # endif |
1532 | #endif | |
1533 | ||
45e878bb NB |
1534 | #ifdef HAVE_FTW |
1535 | # include <ftw.h> | |
1536 | #endif | |
1537 | ||
173fc515 NB |
1538 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); |
1539 | ||
64c4757e | 1540 | extern int Manage_ro(char *devname, int fd, int readonly); |
d5a40416 | 1541 | extern int Manage_run(char *devname, int fd, struct context *c); |
fe7e0e64 N |
1542 | extern int Manage_stop(char *devname, int fd, int quiet, |
1543 | int will_retry); | |
64c4757e | 1544 | extern int Manage_subdevs(char *devname, int fd, |
833bb0f8 | 1545 | struct mddev_dev *devlist, int verbose, int test, |
f2e8393b | 1546 | enum update_opt update, int force); |
1f48664b | 1547 | extern int autodetect(void); |
e5329c37 | 1548 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
50f01ba5 N |
1549 | extern int Grow_addbitmap(char *devname, int fd, |
1550 | struct context *c, struct shape *s); | |
32754b7d | 1551 | extern int Grow_reshape(char *devname, int fd, |
e2e53a2d | 1552 | struct mddev_dev *devlist, |
32754b7d | 1553 | struct context *c, struct shape *s); |
06b0d786 | 1554 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
ea0ebe96 | 1555 | int *fdlist, int cnt, char *backup_file, int verbose); |
e9e43ec3 | 1556 | extern int Grow_continue(int mdfd, struct supertype *st, |
b76b30e0 | 1557 | struct mdinfo *info, char *backup_file, |
06e293d0 | 1558 | int forked, int freeze_reshape); |
860f11ed AP |
1559 | extern int Grow_consistency_policy(char *devname, int fd, |
1560 | struct context *c, struct shape *s); | |
b76b30e0 | 1561 | |
3f54bd62 AK |
1562 | extern int restore_backup(struct supertype *st, |
1563 | struct mdinfo *content, | |
1564 | int working_disks, | |
1565 | int spares, | |
54ded86f | 1566 | char **backup_filep, |
3f54bd62 | 1567 | int verbose); |
2dddadb0 AK |
1568 | extern int Grow_continue_command(char *devname, int fd, |
1569 | char *backup_file, int verbose); | |
64c4757e | 1570 | |
7f91af49 | 1571 | extern int Assemble(struct supertype *st, char *mddev, |
fa56eddb | 1572 | struct mddev_ident *ident, |
87f26d14 | 1573 | struct mddev_dev *devlist, |
4977146a | 1574 | struct context *c); |
64c4757e | 1575 | |
330c07f8 MT |
1576 | extern int Build(struct mddev_ident *ident, struct mddev_dev *devlist, struct shape *s, |
1577 | struct context *c); | |
1578 | ||
1579 | extern int Create(struct supertype *st, struct mddev_ident *ident, int subdevs, | |
1580 | struct mddev_dev *devlist, struct shape *s, struct context *c); | |
64c4757e | 1581 | |
ef898ce6 | 1582 | extern int Detail(char *dev, struct context *c); |
9eafa1de | 1583 | extern int Detail_Platform(struct superswitch *ss, int scan, int verbose, int export, char *controller_path); |
e0d19036 | 1584 | extern int Query(char *dev); |
6d388a88 | 1585 | extern int ExamineBadblocks(char *devname, int brief, struct supertype *forcest); |
eec3f887 N |
1586 | extern int Examine(struct mddev_dev *devlist, struct context *c, |
1587 | struct supertype *forcest); | |
a655e550 | 1588 | extern int Monitor(struct mddev_dev *devlist, |
e0d19036 | 1589 | char *mailaddr, char *alert_cmd, |
95c50205 N |
1590 | struct context *c, |
1591 | int daemonise, int oneshot, | |
1592 | int dosyslog, char *pidfile, int increments, | |
1593 | int share); | |
64c4757e | 1594 | |
ba728be7 N |
1595 | extern int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl); |
1596 | extern int Kill_subarray(char *dev, char *subarray, int verbose); | |
f2e8393b | 1597 | extern int Update_subarray(char *dev, char *subarray, enum update_opt update, struct mddev_ident *ident, int quiet); |
b90c0e9a | 1598 | extern int Wait(char *dev); |
1ea04629 | 1599 | extern int WaitClean(char *dev, int verbose); |
a740cf64 | 1600 | extern int SetAction(char *dev, char *action); |
9a9dab36 | 1601 | |
b11fe74d | 1602 | extern int Incremental(struct mddev_dev *devlist, struct context *c, |
11b6d91d | 1603 | struct supertype *st); |
8382f19b | 1604 | extern void RebuildMap(void); |
d5a40416 | 1605 | extern int IncrementalScan(struct context *c, char *devnm); |
950bc344 | 1606 | extern int IncrementalRemove(char *devname, char *path, int verbose); |
c82f047c NB |
1607 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
1608 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 1609 | unsigned long write_behind, |
dcec9ee5 NB |
1610 | unsigned long long array_size, |
1611 | int major); | |
55935d51 | 1612 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
9c030dad | 1613 | extern int IsBitmapDirty(char *filename); |
20b60dcd | 1614 | extern int Write_rules(char *rule_name); |
bf4fb153 | 1615 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
561ad559 AP |
1616 | |
1617 | /* calculate the size of the bitmap given the array size and bitmap chunksize */ | |
1618 | static inline unsigned long long | |
1619 | bitmap_bits(unsigned long long array_size, unsigned long chunksize) | |
1620 | { | |
1621 | return (array_size * 512 + chunksize - 1) / chunksize; | |
1622 | } | |
1623 | ||
74db60b0 N |
1624 | extern int Dump_metadata(char *dev, char *dir, struct context *c, |
1625 | struct supertype *st); | |
1626 | extern int Restore_metadata(char *dev, char *dir, struct context *c, | |
1627 | struct supertype *st, int only); | |
c82f047c | 1628 | |
9db2ab4e | 1629 | int md_array_valid(int fd); |
3ab8f4bf | 1630 | int md_array_active(int fd); |
a822017f | 1631 | int md_array_is_active(struct mdinfo *info); |
9cd39f01 | 1632 | int md_get_array_info(int fd, struct mdu_array_info_s *array); |
018a4882 | 1633 | int md_set_array_info(int fd, struct mdu_array_info_s *array); |
d97572f5 | 1634 | int md_get_disk_info(int fd, struct mdu_disk_info_s *disk); |
e0d19036 | 1635 | extern int get_linux_version(void); |
bc77ed53 | 1636 | extern int mdadm_version(char *version); |
51d4261c | 1637 | extern unsigned long long parse_size(char *size); |
64c4757e | 1638 | extern int parse_uuid(char *str, int uuid[4]); |
913f07d1 | 1639 | int default_layout(struct supertype *st, int level, int verbose); |
5339f996 | 1640 | extern int is_near_layout_10(int layout); |
4a06e2c2 N |
1641 | extern int parse_layout_10(char *layout); |
1642 | extern int parse_layout_faulty(char *layout); | |
25aa7329 | 1643 | extern int parse_num(int *dest, const char *num); |
4de90913 | 1644 | extern int parse_cluster_confirm_arg(char *inp, char **devname, int *slot); |
682c7051 NB |
1645 | extern int check_ext2(int fd, char *name); |
1646 | extern int check_reiser(int fd, char *name); | |
1647 | extern int check_raid(int fd, char *name); | |
53ed6ac3 KW |
1648 | extern int check_partitions(int fd, char *dname, |
1649 | unsigned long long freesize, | |
1650 | unsigned long long size); | |
e2eb503b | 1651 | extern bool is_name_posix_compatible(const char *path); |
0a6bff09 | 1652 | extern int fstat_is_blkdev(int fd, char *devname, dev_t *rdev); |
9e04ac1c | 1653 | extern int stat_is_blkdev(char *devname, dev_t *rdev); |
64c4757e | 1654 | |
67417d92 | 1655 | extern bool is_string_lq(const char * const str, size_t max_len); |
a35aa68f | 1656 | extern bool is_dev_alive(char *path); |
dd0781e5 | 1657 | extern int get_mdp_major(void); |
cc742d38 | 1658 | extern int get_maj_min(char *dev, int *major, int *minor); |
7211116c | 1659 | extern bool is_bit_set(int *val, unsigned char index); |
8b0dabea | 1660 | extern int dev_open(char *dev, int flags); |
4dd2df09 | 1661 | extern int open_dev(char *devnm); |
8832342d | 1662 | extern void reopen_mddev(int mdfd); |
4dd2df09 N |
1663 | extern int open_dev_flags(char *devnm, int flags); |
1664 | extern int open_dev_excl(char *devnm); | |
8d80900b | 1665 | extern int is_standard(char *dev, int *nump); |
9008ed1c | 1666 | extern int same_dev(char *one, char *two); |
9eafa1de | 1667 | extern int compare_paths (char* path1,char* path2); |
a7dec3fd | 1668 | extern void enable_fds(int devices); |
ff6bb131 | 1669 | extern void manage_fork_fds(int close_all); |
723d1df4 | 1670 | extern int continue_via_systemd(char *devnm, char *service_name, char *prefix); |
dd0781e5 | 1671 | |
7fcbfd7c | 1672 | extern void ident_init(struct mddev_ident *ident); |
ae5f13a9 | 1673 | extern mdadm_status_t ident_set_devname(struct mddev_ident *ident, const char *devname); |
67417d92 | 1674 | extern mdadm_status_t ident_set_name(struct mddev_ident *ident, const char *name); |
7fcbfd7c | 1675 | |
f1ae21c4 | 1676 | extern int parse_auto(char *str, char *msg, int config); |
fa56eddb | 1677 | extern struct mddev_ident *conf_get_ident(char *dev); |
a655e550 | 1678 | extern struct mddev_dev *conf_get_devs(void); |
8382f19b | 1679 | extern int conf_test_dev(char *devname); |
4e8d9f0a | 1680 | extern int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost); |
8aec876d NB |
1681 | extern struct createinfo *conf_get_create_info(void); |
1682 | extern void set_conffile(char *file); | |
1683 | extern char *conf_get_mailaddr(void); | |
1684 | extern char *conf_get_mailfrom(void); | |
1685 | extern char *conf_get_program(void); | |
0ac91628 | 1686 | extern char *conf_get_homehost(int *require_homehostp); |
7716570e | 1687 | extern char *conf_get_homecluster(void); |
0663137c | 1688 | extern int conf_get_monitor_delay(void); |
e0d19036 | 1689 | extern char *conf_line(FILE *file); |
98c6faba | 1690 | extern char *conf_word(FILE *file, int allow_key); |
7103b9b8 | 1691 | extern void print_quoted(char *str); |
06d2ffc3 | 1692 | extern int use_udev(void); |
9935cf0f | 1693 | extern void print_escape(char *str); |
2eba8496 | 1694 | extern unsigned long GCD(unsigned long a, unsigned long b); |
0ac91628 | 1695 | extern int conf_name_is_free(char *name); |
ae5f13a9 | 1696 | extern bool is_devname_ignore(const char *devname); |
25aa7329 MT |
1697 | extern bool is_devname_md_numbered(const char *devname); |
1698 | extern bool is_devname_md_d_numbered(const char *devname); | |
7c336758 | 1699 | extern int conf_verify_devnames(struct mddev_ident *array_list); |
0ac91628 | 1700 | extern int devname_matches(char *name, char *match); |
2244d1a9 N |
1701 | extern struct mddev_ident *conf_match(struct supertype *st, |
1702 | struct mdinfo *info, | |
1703 | char *devname, | |
1704 | int verbose, int *rvp); | |
0ac91628 | 1705 | |
e0d19036 NB |
1706 | extern void free_line(char *line); |
1707 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 1708 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
22e263f6 | 1709 | extern const int uuid_zero[4]; |
f277ce36 | 1710 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
350f29f9 | 1711 | extern void copy_uuid(void *a, int b[4], int swapuuid); |
aae5a112 | 1712 | extern char *__fname_from_uuid(int id[4], int swap, char *buf, char sep); |
d7288ddc | 1713 | extern char *fname_from_uuid(struct supertype *st, |
ff54de6e | 1714 | struct mdinfo *info, char *buf, char sep); |
4b1ac34b | 1715 | extern unsigned long calc_csum(void *super, int bytes); |
583315d9 | 1716 | extern int enough(int level, int raid_disks, int layout, int clean, |
de5a472e | 1717 | char *avail); |
e0d19036 | 1718 | extern int ask(char *mesg); |
8fac0577 | 1719 | extern unsigned long long get_component_size(int fd); |
0430ed48 | 1720 | extern void remove_partitions(int fd); |
691c6ee1 | 1721 | extern int test_partition(int fd); |
bfd76b93 | 1722 | extern int test_partition_from_id(dev_t id); |
577e8448 | 1723 | extern int get_data_disks(int level, int layout, int raid_disks); |
5f8097be NB |
1724 | extern unsigned long long calc_array_size(int level, int raid_disks, int layout, |
1725 | int chunksize, unsigned long long devsize); | |
edd8d13c NB |
1726 | extern int flush_metadata_updates(struct supertype *st); |
1727 | extern void append_metadata_update(struct supertype *st, void *buf, int len); | |
6234c63c | 1728 | extern int assemble_container_content(struct supertype *st, int mdfd, |
11b6d91d N |
1729 | struct mdinfo *content, |
1730 | struct context *c, | |
9ca39acb N |
1731 | char *chosen_name, int *result); |
1732 | #define INCR_NO 1 | |
1733 | #define INCR_UNSAFE 2 | |
1734 | #define INCR_ALREADY 4 | |
1735 | #define INCR_YES 8 | |
0c0f09cb MT |
1736 | |
1737 | extern bool devid_matches_criteria(dev_t devid, struct spare_criteria *sc); | |
1738 | extern bool disk_fd_matches_criteria(int disk_fd, struct spare_criteria *sc); | |
326727d9 | 1739 | extern struct mdinfo *container_choose_spares(struct supertype *st, |
fbfdcb06 | 1740 | struct spare_criteria *criteria, |
326727d9 AC |
1741 | struct domainlist *domlist, |
1742 | char *spare_group, | |
1743 | const char *metadata, int get_one); | |
d52bb542 | 1744 | extern int move_spare(char *from_devname, char *to_devname, dev_t devid); |
7801ac20 N |
1745 | extern int add_disk(int mdfd, struct supertype *st, |
1746 | struct mdinfo *sra, struct mdinfo *info); | |
de6ae750 N |
1747 | extern int remove_disk(int mdfd, struct supertype *st, |
1748 | struct mdinfo *sra, struct mdinfo *info); | |
1ab9ed2a N |
1749 | extern int hot_remove_disk(int mdfd, unsigned long dev, int force); |
1750 | extern int sys_hot_remove_disk(int statefd, int force); | |
f35f2525 | 1751 | extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info); |
1e5c6983 | 1752 | unsigned long long min_recovery_start(struct mdinfo *array); |
cd29a5c8 | 1753 | |
56eb10c0 | 1754 | extern char *human_size(long long bytes); |
f0ec6710 | 1755 | extern char *human_size_brief(long long bytes, int prefix); |
e4965ef8 | 1756 | extern void print_r10_layout(int layout); |
e0d19036 | 1757 | |
4dd2df09 | 1758 | extern char *find_free_devnm(int use_partitions); |
63152c1b | 1759 | |
e0d19036 | 1760 | extern void put_md_name(char *name); |
d3c40fab | 1761 | extern char *devid2kname(dev_t devid); |
13db17bd ML |
1762 | extern char *devid2devnm(dev_t devid); |
1763 | extern dev_t devnm2devid(char *devnm); | |
4dd2df09 | 1764 | extern char *get_md_name(char *devnm); |
e0d19036 | 1765 | |
c913b90e | 1766 | extern char DefaultConfFile[]; |
b5e64645 | 1767 | |
69207ff6 | 1768 | extern int create_mddev(char *dev, char *name, int autof, int trustworthy, |
cd6cbb08 | 1769 | char *chosen, int block_udev); |
69207ff6 N |
1770 | /* values for 'trustworthy' */ |
1771 | #define LOCAL 1 | |
d1d3482b | 1772 | #define LOCAL_ANY 10 |
69207ff6 N |
1773 | #define FOREIGN 2 |
1774 | #define METADATA 3 | |
6be1d39d | 1775 | extern int open_mddev(char *dev, int report_errors); |
e702f392 | 1776 | extern int is_mddev(char *dev); |
a322f70c | 1777 | extern int open_container(int fd); |
4dd2df09 N |
1778 | extern int metadata_container_matches(char *metadata, char *devnm); |
1779 | extern int metadata_subdev_matches(char *metadata, char *devnm); | |
33414a01 DW |
1780 | extern int is_container_member(struct mdstat_ent *ent, char *devname); |
1781 | extern int is_subarray_active(char *subarray, char *devname); | |
feab51f8 | 1782 | extern int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet); |
33414a01 | 1783 | extern struct superswitch *version_to_superswitch(char *vers); |
b5e64645 | 1784 | |
4dd2df09 N |
1785 | extern int mdmon_running(char *devnm); |
1786 | extern int mdmon_pid(char *devnm); | |
40ebbb9c | 1787 | extern int check_env(char *name); |
148acb7b | 1788 | extern __u32 random32(void); |
c5f71c24 | 1789 | extern void random_uuid(__u8 *buf); |
4dd2df09 | 1790 | extern int start_mdmon(char *devnm); |
a931db9e | 1791 | |
999b4972 N |
1792 | extern int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, |
1793 | struct supertype *st, unsigned long stripes, | |
1794 | int *fds, unsigned long long *offsets, | |
1795 | int dests, int *destfd, unsigned long long *destoffsets); | |
10f22854 | 1796 | void abort_reshape(struct mdinfo *sra); |
999b4972 | 1797 | |
afa368f4 N |
1798 | void *super1_make_v0(struct supertype *st, struct mdinfo *info, mdp_super_t *sb0); |
1799 | ||
f96b1302 AP |
1800 | extern char *stat2kname(struct stat *st); |
1801 | extern char *fd2kname(int fd); | |
4dd2df09 | 1802 | extern char *stat2devnm(struct stat *st); |
27ad4900 | 1803 | bool stat_is_md_dev(struct stat *st); |
4dd2df09 | 1804 | extern char *fd2devnm(int fd); |
a931db9e | 1805 | |
a9c15847 | 1806 | extern int in_initrd(void); |
d15a1f72 | 1807 | |
e80357f8 GJ |
1808 | struct cmap_hooks { |
1809 | void *cmap_handle; /* corosync lib related */ | |
1810 | ||
1811 | int (*initialize)(cmap_handle_t *handle); | |
1812 | int (*get_string)(cmap_handle_t handle, | |
1813 | const char *string, | |
1814 | char **name); | |
1815 | int (*finalize)(cmap_handle_t handle); | |
1816 | }; | |
1817 | ||
1818 | extern void set_cmap_hooks(void); | |
1819 | extern void set_hooks(void); | |
1820 | ||
d15a1f72 GJ |
1821 | struct dlm_hooks { |
1822 | void *dlm_handle; /* dlm lib related */ | |
1823 | ||
1824 | dlm_lshandle_t (*create_lockspace)(const char *name, | |
1825 | unsigned int mode); | |
1b7eb962 | 1826 | dlm_lshandle_t (*open_lockspace)(const char *name); |
d15a1f72 GJ |
1827 | int (*release_lockspace)(const char *name, dlm_lshandle_t ls, |
1828 | int force); | |
1829 | int (*ls_lock)(dlm_lshandle_t lockspace, uint32_t mode, | |
1830 | struct dlm_lksb *lksb, uint32_t flags, | |
1831 | const void *name, unsigned int namelen, | |
1832 | uint32_t parent, void (*astaddr) (void *astarg), | |
1833 | void *astarg, void (*bastaddr) (void *astarg), | |
1834 | void *range); | |
1b7eb962 GJ |
1835 | int (*ls_unlock_wait)(dlm_lshandle_t lockspace, uint32_t lkid, |
1836 | uint32_t flags, struct dlm_lksb *lksb); | |
d15a1f72 GJ |
1837 | int (*ls_get_fd)(dlm_lshandle_t ls); |
1838 | int (*dispatch)(int fd); | |
1839 | }; | |
1840 | ||
7716570e | 1841 | extern int get_cluster_name(char **name); |
81a8a694 | 1842 | extern int dlm_funs_ready(void); |
1b7eb962 GJ |
1843 | extern int cluster_get_dlmlock(void); |
1844 | extern int cluster_release_dlmlock(void); | |
d15a1f72 | 1845 | extern void set_dlm_hooks(void); |
a9c15847 | 1846 | |
239b3cc0 MG |
1847 | #define MSEC_TO_NSEC(msec) ((msec) * 1000000) |
1848 | #define USEC_TO_NSEC(usec) ((usec) * 1000) | |
1849 | extern void sleep_for(unsigned int sec, long nsec, bool wake_after_interrupt); | |
ee9dcf95 MG |
1850 | extern bool is_directory(const char *path); |
1851 | extern bool is_file(const char *path); | |
21e622f2 | 1852 | extern int s_gethostname(char *buf, int buf_len); |
239b3cc0 | 1853 | |
2d762ade | 1854 | #define _ROUND_UP(val, base) (((val) + (base) - 1) & ~(base - 1)) |
de897065 JS |
1855 | #define ROUND_UP(val, base) _ROUND_UP(val, (typeof(val))(base)) |
1856 | #define ROUND_UP_PTR(ptr, base) ((typeof(ptr)) \ | |
1857 | (ROUND_UP((unsigned long)(ptr), base))) | |
6416d527 | 1858 | |
3c558363 N |
1859 | static inline int is_subarray(char *vers) |
1860 | { | |
e9dd1598 | 1861 | /* The version string for a 'subarray' (an array in a container) |
1011e834 | 1862 | * is |
e9dd1598 | 1863 | * /containername/componentname for normal read-write arrays |
746a6567 N |
1864 | * -containername/componentname for arrays which mdmon must not |
1865 | * reconfigure. They might be read-only | |
1866 | * or might be undergoing reshape etc. | |
e9dd1598 N |
1867 | * containername is e.g. md0, md_d1 |
1868 | * componentname is dependant on the metadata. e.g. '1' 'S1' ... | |
1869 | */ | |
1870 | return (*vers == '/' || *vers == '-'); | |
3c558363 N |
1871 | } |
1872 | ||
e5408a32 DW |
1873 | static inline char *to_subarray(struct mdstat_ent *ent, char *container) |
1874 | { | |
1875 | return &ent->metadata_version[10+strlen(container)+1]; | |
1876 | } | |
1877 | ||
83a379cf LF |
1878 | /** |
1879 | * signal_s() - Wrapper for sigaction() with signal()-like interface. | |
1880 | * @sig: The signal to set the signal handler to. | |
1881 | * @handler: The signal handler. | |
1882 | * | |
1883 | * Return: previous handler or SIG_ERR on failure. | |
1884 | */ | |
1885 | static inline sighandler_t signal_s(int sig, sighandler_t handler) | |
1886 | { | |
38cb95dd MK |
1887 | struct sigaction new_act = {0}; |
1888 | struct sigaction old_act = {0}; | |
83a379cf LF |
1889 | |
1890 | new_act.sa_handler = handler; | |
83a379cf LF |
1891 | |
1892 | if (sigaction(sig, &new_act, &old_act) == 0) | |
1893 | return old_act.sa_handler; | |
1894 | ||
1895 | return SIG_ERR; | |
1896 | } | |
1897 | ||
2a24d7b6 DW |
1898 | #ifdef DEBUG |
1899 | #define dprintf(fmt, arg...) \ | |
1ade5cc1 N |
1900 | fprintf(stderr, "%s: %s: "fmt, Name, __func__, ##arg) |
1901 | #define dprintf_cont(fmt, arg...) \ | |
2a24d7b6 DW |
1902 | fprintf(stderr, fmt, ##arg) |
1903 | #else | |
1904 | #define dprintf(fmt, arg...) \ | |
1ade5cc1 N |
1905 | ({ if (0) fprintf(stderr, "%s: %s: " fmt, Name, __func__, ##arg); 0; }) |
1906 | #define dprintf_cont(fmt, arg...) \ | |
2a24d7b6 DW |
1907 | ({ if (0) fprintf(stderr, fmt, ##arg); 0; }) |
1908 | #endif | |
7fcbfd7c | 1909 | |
1a0ee0ba DK |
1910 | static inline int xasprintf(char **strp, const char *fmt, ...) { |
1911 | va_list ap; | |
1912 | int ret; | |
1913 | va_start(ap, fmt); | |
089485cb | 1914 | ret = vasprintf(strp, fmt, ap); |
1a0ee0ba DK |
1915 | va_end(ap); |
1916 | assert(ret >= 0); | |
1917 | return ret; | |
1918 | } | |
2a24d7b6 | 1919 | |
1ade5cc1 N |
1920 | #ifdef DEBUG |
1921 | #define pr_err(fmt, args...) fprintf(stderr, "%s: %s: "fmt, Name, __func__, ##args) | |
1922 | #else | |
d56dd607 | 1923 | #define pr_err(fmt, args...) fprintf(stderr, "%s: "fmt, Name, ##args) |
1ade5cc1 | 1924 | #endif |
e7b84f9d N |
1925 | #define cont_err(fmt ...) fprintf(stderr, " " fmt) |
1926 | ||
9364dbfb LG |
1927 | #define pr_info(fmt, args...) printf("%s: "fmt, Name, ##args) |
1928 | ||
503975b9 N |
1929 | void *xmalloc(size_t len); |
1930 | void *xrealloc(void *ptr, size_t len); | |
1931 | void *xcalloc(size_t num, size_t size); | |
1932 | char *xstrdup(const char *str); | |
1933 | ||
b5e64645 NB |
1934 | #define LEVEL_MULTIPATH (-4) |
1935 | #define LEVEL_LINEAR (-1) | |
1936 | #define LEVEL_FAULTY (-5) | |
1937 | ||
17f25ca6 NB |
1938 | /* kernel module doesn't know about these */ |
1939 | #define LEVEL_CONTAINER (-100) | |
a322f70c | 1940 | #define LEVEL_UNSUPPORTED (-200) |
17f25ca6 | 1941 | |
56cb05c4 N |
1942 | /* the kernel does know about this one ... */ |
1943 | #define LEVEL_NONE (-1000000) | |
1944 | ||
b5e64645 NB |
1945 | /* faulty stuff */ |
1946 | ||
1947 | #define WriteTransient 0 | |
1948 | #define ReadTransient 1 | |
1949 | #define WritePersistent 2 | |
1950 | #define ReadPersistent 3 | |
1951 | #define WriteAll 4 /* doesn't go to device */ | |
1952 | #define ReadFixable 5 | |
1953 | #define Modes 6 | |
1954 | ||
1955 | #define ClearErrors 31 | |
1956 | #define ClearFaults 30 | |
1957 | ||
1958 | #define AllPersist 100 /* internal use only */ | |
1959 | #define NoPersist 101 | |
1960 | ||
1961 | #define ModeMask 0x1f | |
1962 | #define ModeShift 5 | |
fe6729fa | 1963 | |
fe6729fa NB |
1964 | #ifdef __TINYC__ |
1965 | #undef minor | |
1966 | #undef major | |
1967 | #undef makedev | |
1968 | #define minor(x) ((x)&0xff) | |
1969 | #define major(x) (((x)>>8)&0xff) | |
1970 | #define makedev(M,m) (((M)<<8) | (m)) | |
1971 | #endif | |
1972 | ||
329dfc28 N |
1973 | enum r0layout { |
1974 | RAID0_ORIG_LAYOUT = 1, | |
1975 | RAID0_ALT_MULTIZONE_LAYOUT = 2, | |
1976 | }; | |
1977 | ||
b640a252 | 1978 | /* for raid4/5/6 */ |
e86c9dd6 NB |
1979 | #define ALGORITHM_LEFT_ASYMMETRIC 0 |
1980 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
1981 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
1982 | #define ALGORITHM_RIGHT_SYMMETRIC 3 | |
b640a252 N |
1983 | |
1984 | /* Define non-rotating (raid4) algorithms. These allow | |
1985 | * conversion of raid4 to raid5. | |
1986 | */ | |
1987 | #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */ | |
1988 | #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */ | |
1989 | ||
1990 | /* DDF RAID6 layouts differ from md/raid6 layouts in two ways. | |
1991 | * Firstly, the exact positioning of the parity block is slightly | |
1992 | * different between the 'LEFT_*' modes of md and the "_N_*" modes | |
1993 | * of DDF. | |
1994 | * Secondly, or order of datablocks over which the Q syndrome is computed | |
1995 | * is different. | |
1996 | * Consequently we have different layouts for DDF/raid6 than md/raid6. | |
1997 | * These layouts are from the DDFv1.2 spec. | |
1998 | * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but | |
1999 | * leaves RLQ=3 as 'Vendor Specific' | |
2000 | */ | |
2001 | ||
2002 | #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */ | |
2003 | #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */ | |
2004 | #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */ | |
2005 | ||
b640a252 N |
2006 | /* For every RAID5 algorithm we define a RAID6 algorithm |
2007 | * with exactly the same layout for data and parity, and | |
2008 | * with the Q block always on the last device (N-1). | |
2009 | * This allows trivial conversion from RAID5 to RAID6 | |
2010 | */ | |
2011 | #define ALGORITHM_LEFT_ASYMMETRIC_6 16 | |
2012 | #define ALGORITHM_RIGHT_ASYMMETRIC_6 17 | |
2013 | #define ALGORITHM_LEFT_SYMMETRIC_6 18 | |
2014 | #define ALGORITHM_RIGHT_SYMMETRIC_6 19 | |
2015 | #define ALGORITHM_PARITY_0_6 20 | |
2016 | #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N | |
2017 | ||
33a6535d AW |
2018 | /* Define PATH_MAX in case we don't use glibc or standard library does |
2019 | * not have PATH_MAX defined. Assume max path length is 4K characters. | |
2020 | */ | |
2021 | #ifndef PATH_MAX | |
2022 | #define PATH_MAX 4096 | |
2023 | #endif | |
2024 | ||
9dad51d4 N |
2025 | #define RESYNC_NONE -1 |
2026 | #define RESYNC_DELAYED -2 | |
2027 | #define RESYNC_PENDING -3 | |
1c294b5d LZ |
2028 | #define RESYNC_REMOTE -4 |
2029 | #define RESYNC_UNKNOWN -5 | |
a0963a86 | 2030 | |
480f3566 N |
2031 | /* When using "GET_DISK_INFO" it isn't certain how high |
2032 | * we need to check. So we impose an absolute limit of | |
2033 | * MAX_DISKS. This needs to be much more than the largest | |
2034 | * number of devices any metadata can support. Currently | |
2035 | * v1.x can support 1920 | |
2036 | */ | |
2037 | #define MAX_DISKS 4096 | |
2038 | ||
d04f65f4 N |
2039 | /* Sometimes the 'size' value passed needs to mean "Maximum". |
2040 | * In those cases with use MAX_SIZE | |
2041 | */ | |
2042 | #define MAX_SIZE 1 | |
822e393a N |
2043 | |
2044 | /* We want to use unsigned numbers for sector counts, but need | |
2045 | * a value for 'invalid'. Use '1'. | |
2046 | */ | |
2047 | #define INVALID_SECTORS 1 | |
72ca9bcf N |
2048 | /* And another special number needed for --data_offset=variable */ |
2049 | #define VARIABLE_OFFSET 3 | |
ced5fa8b | 2050 | |
6f2af6a4 KT |
2051 | /** |
2052 | * is_container() - check if @level is &LEVEL_CONTAINER | |
2053 | * @level: level value | |
2054 | * | |
2055 | * return: | |
2056 | * 1 if level is equal to &LEVEL_CONTAINER, 0 otherwise. | |
2057 | */ | |
2058 | static inline int is_container(const int level) | |
2059 | { | |
2060 | if (level == LEVEL_CONTAINER) | |
2061 | return 1; | |
2062 | return 0; | |
2063 | } | |
b823c8f9 MK |
2064 | |
2065 | #define STR_COMMON_NONE "none" | |
2066 | ||
2067 | /** | |
2068 | * str_is_none() - check if @str starts with "none". | |
2069 | * @str: string | |
2070 | * | |
2071 | * return: | |
2072 | * true if string starts with "none", false otherwise. | |
2073 | */ | |
2074 | static inline bool str_is_none(char *str) | |
2075 | { | |
2076 | if (strncmp(str, STR_COMMON_NONE, sizeof(STR_COMMON_NONE) - 1) == 0) | |
2077 | return true; | |
2078 | return false; | |
2079 | } |