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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; |
51a9f2fc | 436 | struct dev_policy *pols; |
fbfdcb06 AO |
437 | }; |
438 | ||
67417d92 MT |
439 | typedef enum mdadm_status { |
440 | MDADM_STATUS_SUCCESS = 0, | |
441 | MDADM_STATUS_ERROR, | |
442 | MDADM_STATUS_UNDEF, | |
443 | } mdadm_status_t; | |
444 | ||
e0d19036 NB |
445 | enum mode { |
446 | ASSEMBLE=1, | |
447 | BUILD, | |
448 | CREATE, | |
449 | MANAGE, | |
450 | MISC, | |
451 | MONITOR, | |
dd0781e5 | 452 | GROW, |
8382f19b | 453 | INCREMENTAL, |
1f48664b | 454 | AUTODETECT, |
5187a385 | 455 | mode_count |
e0d19036 NB |
456 | }; |
457 | ||
64c4757e | 458 | extern char short_options[]; |
6c9d9260 | 459 | extern char short_monitor_options[]; |
024768c4 | 460 | extern char short_bitmap_options[]; |
c06487ce | 461 | extern char short_bitmap_auto_options[]; |
64c4757e | 462 | extern struct option long_options[]; |
56eedc1a | 463 | extern char Version[], Usage[], Help[], OptionHelp[], |
5187a385 | 464 | *mode_help[], |
dd0781e5 | 465 | Help_create[], Help_build[], Help_assemble[], Help_grow[], |
8382f19b | 466 | Help_incr[], |
e0d19036 | 467 | Help_manage[], Help_misc[], Help_monitor[], Help_config[]; |
64c4757e | 468 | |
997aed5d | 469 | /* for option that don't have short equivilents, we assign arbitrary |
1c7a808c | 470 | * numbers later than any 'short' character option. |
997aed5d NB |
471 | */ |
472 | enum special_options { | |
1c7a808c | 473 | AssumeClean = 300, |
577fd104 | 474 | WriteZeroes, |
997aed5d NB |
475 | BitmapChunk, |
476 | WriteBehind, | |
477 | ReAdd, | |
478 | NoDegraded, | |
479 | Sparc22, | |
1c7a808c | 480 | BackupFile, |
997aed5d | 481 | HomeHost, |
589395d6 | 482 | AutoHomeHost, |
1f48664b | 483 | AutoDetect, |
1770662b | 484 | Waitclean, |
4cce4069 | 485 | DetailPlatform, |
33414a01 | 486 | KillSubarray, |
1c7a808c | 487 | UpdateSubarray, |
edde9560 | 488 | IncrementalPath, |
1c7a808c N |
489 | NoSharing, |
490 | HelpOptions, | |
491 | Brief, | |
d11abe4b | 492 | NoDevices, |
1c7a808c N |
493 | ManageOpt, |
494 | Add, | |
f33a71f1 | 495 | AddSpare, |
01290056 | 496 | AddJournal, |
1c7a808c N |
497 | Remove, |
498 | Fail, | |
70c55e36 N |
499 | Replace, |
500 | With, | |
1c7a808c N |
501 | MiscOpt, |
502 | WaitOpt, | |
503 | ConfigFile, | |
504 | ChunkSize, | |
505 | WriteMostly, | |
71574efb N |
506 | FailFast, |
507 | NoFailFast, | |
1c7a808c N |
508 | Layout, |
509 | Auto, | |
510 | Force, | |
511 | SuperMinor, | |
512 | EMail, | |
513 | ProgramOpt, | |
514 | Increment, | |
515 | Fork, | |
516 | Bitmap, | |
517 | RebuildMapOpt, | |
87f26d14 | 518 | InvalidBackup, |
20b60dcd | 519 | UdevRules, |
b76b30e0 | 520 | FreezeReshape, |
2dddadb0 | 521 | Continue, |
08ca2adf | 522 | OffRootOpt, |
c2ecf5f6 | 523 | Prefer, |
f7d3febc | 524 | KillOpt, |
40c9a66a | 525 | DataOffset, |
6d388a88 | 526 | ExamineBB, |
74db60b0 N |
527 | Dump, |
528 | Restore, | |
a740cf64 | 529 | Action, |
529e2aa5 | 530 | Nodes, |
7716570e | 531 | ClusterName, |
4de90913 | 532 | ClusterConfirm, |
cc1799c3 | 533 | WriteJournal, |
5308f117 | 534 | ConsistencyPolicy, |
997aed5d NB |
535 | }; |
536 | ||
2568ce89 MK |
537 | enum update_opt { |
538 | UOPT_NAME = 1, | |
539 | UOPT_PPL, | |
540 | UOPT_NO_PPL, | |
541 | UOPT_BITMAP, | |
542 | UOPT_NO_BITMAP, | |
543 | UOPT_SUBARRAY_ONLY, | |
544 | UOPT_SPARC22, | |
545 | UOPT_SUPER_MINOR, | |
546 | UOPT_SUMMARIES, | |
547 | UOPT_RESYNC, | |
548 | UOPT_UUID, | |
549 | UOPT_HOMEHOST, | |
550 | UOPT_HOME_CLUSTER, | |
551 | UOPT_NODES, | |
552 | UOPT_DEVICESIZE, | |
553 | UOPT_BBL, | |
554 | UOPT_NO_BBL, | |
555 | UOPT_FORCE_NO_BBL, | |
556 | UOPT_METADATA, | |
557 | UOPT_REVERT_RESHAPE, | |
558 | UOPT_LAYOUT_ORIGINAL, | |
559 | UOPT_LAYOUT_ALTERNATE, | |
560 | UOPT_LAYOUT_UNSPECIFIED, | |
561 | UOPT_BYTEORDER, | |
562 | UOPT_HELP, | |
2257de10 MK |
563 | UOPT_USER_ONLY, |
564 | /* | |
565 | * Code specific options, cannot be set by the user | |
566 | */ | |
567 | UOPT_SPEC_FORCE_ONE, | |
568 | UOPT_SPEC_FORCE_ARRAY, | |
569 | UOPT_SPEC_ASSEMBLE, | |
570 | UOPT_SPEC_LINEAR_GROW_NEW, | |
571 | UOPT_SPEC_LINEAR_GROW_UPDATE, | |
572 | UOPT_SPEC__RESHAPE_PROGRESS, | |
573 | UOPT_SPEC_WRITEMOSTLY, | |
574 | UOPT_SPEC_READWRITE, | |
575 | UOPT_SPEC_FAILFAST, | |
576 | UOPT_SPEC_NOFAILFAST, | |
577 | UOPT_SPEC_REVERT_RESHAPE_NOBACKUP, | |
2568ce89 MK |
578 | UOPT_UNDEFINED |
579 | }; | |
580 | extern void fprint_update_options(FILE *outf, enum update_opt update_mode); | |
581 | ||
f0ec6710 MN |
582 | enum prefix_standard { |
583 | JEDEC, | |
584 | IEC | |
585 | }; | |
586 | ||
0aa2f15b GJ |
587 | enum bitmap_update { |
588 | NoUpdate, | |
589 | NameUpdate, | |
7e6e839a | 590 | NodeNumUpdate, |
0aa2f15b GJ |
591 | }; |
592 | ||
e22fe3ae N |
593 | enum flag_mode { |
594 | FlagDefault, FlagSet, FlagClear, | |
595 | }; | |
596 | ||
64c4757e | 597 | /* structures read from config file */ |
52826846 NB |
598 | /* List of mddevice names and identifiers |
599 | * Identifiers can be: | |
600 | * uuid=128-hex-uuid | |
601 | * super-minor=decimal-minor-number-from-superblock | |
602 | * devices=comma,separated,list,of,device,names,with,wildcards | |
603 | * | |
604 | * If multiple fields are present, the intersection of all matching | |
605 | * devices is considered | |
606 | */ | |
98c6faba | 607 | #define UnSet (0xfffe) |
fa56eddb | 608 | struct mddev_ident { |
dd0781e5 | 609 | char *devname; |
aba69144 | 610 | |
dd0781e5 | 611 | int uuid_set; |
3fa06e9d | 612 | int uuid[4]; |
67417d92 | 613 | char name[MD_NAME_MAX + 1]; |
52826846 | 614 | |
f21e18ca | 615 | int super_minor; |
52826846 | 616 | |
dd0781e5 | 617 | char *devices; /* comma separated list of device |
52826846 NB |
618 | * names with wild cards |
619 | */ | |
dd0781e5 | 620 | int level; |
f21e18ca N |
621 | int raid_disks; |
622 | int spare_disks; | |
82d9eba6 | 623 | struct supertype *st; |
dd0781e5 NB |
624 | int autof; /* 1 for normal, 2 for partitioned */ |
625 | char *spare_group; | |
7ef02d01 | 626 | char *bitmap_file; |
c82f047c | 627 | int bitmap_fd; |
dd0781e5 | 628 | |
1771a6e2 N |
629 | char *container; /* /dev/whatever name of container, or |
630 | * uuid of container. You would expect | |
631 | * this to be the 'devname' or UUID | |
dbb44303 N |
632 | * of some other entry. |
633 | */ | |
634 | char *member; /* subarray within a container */ | |
635 | ||
fa56eddb | 636 | struct mddev_ident *next; |
b179246f N |
637 | union { |
638 | /* fields needed by different users of this structure */ | |
639 | int assembled; /* set when assembly succeeds */ | |
640 | }; | |
fa56eddb | 641 | }; |
64c4757e | 642 | |
9e33d556 N |
643 | struct context { |
644 | int readonly; | |
645 | int runstop; | |
646 | int verbose; | |
9e33d556 | 647 | int brief; |
d11abe4b | 648 | int no_devices; |
9e33d556 N |
649 | int force; |
650 | char *homehost; | |
651 | int require_homehost; | |
652 | char *prefer; | |
653 | int export; | |
654 | int test; | |
655 | char *subarray; | |
3a87fa67 | 656 | enum update_opt update; |
9e33d556 N |
657 | int scan; |
658 | int SparcAdjust; | |
659 | int autof; | |
660 | int delay; | |
661 | int freeze_reshape; | |
662 | char *backup_file; | |
663 | int invalid_backup; | |
a740cf64 | 664 | char *action; |
529e2aa5 | 665 | int nodes; |
7716570e | 666 | char *homecluster; |
9e33d556 N |
667 | }; |
668 | ||
e705e81b N |
669 | struct shape { |
670 | int raiddisks; | |
671 | int sparedisks; | |
cc1799c3 | 672 | int journaldisks; |
e705e81b N |
673 | int level; |
674 | int layout; | |
675 | char *layout_str; | |
676 | int chunk; | |
677 | int bitmap_chunk; | |
678 | char *bitmap_file; | |
679 | int assume_clean; | |
577fd104 | 680 | bool write_zeroes; |
e705e81b N |
681 | int write_behind; |
682 | unsigned long long size; | |
ae5dfc56 | 683 | unsigned long long data_offset; |
5308f117 | 684 | int consistency_policy; |
e705e81b N |
685 | }; |
686 | ||
64c4757e | 687 | /* List of device names - wildcards expanded */ |
a655e550 | 688 | struct mddev_dev { |
64c4757e | 689 | char *devname; |
c8e1a230 N |
690 | int disposition; /* 'a' for add, 'r' for remove, 'f' for fail, |
691 | * 'A' for re_add. | |
cd29a5c8 NB |
692 | * Not set for names read from .config |
693 | */ | |
e22fe3ae N |
694 | enum flag_mode writemostly; |
695 | enum flag_mode failfast; | |
70c55e36 | 696 | int used; /* set when used */ |
72ca9bcf | 697 | long long data_offset; |
a655e550 N |
698 | struct mddev_dev *next; |
699 | }; | |
64c4757e | 700 | |
682c7051 NB |
701 | typedef struct mapping { |
702 | char *name; | |
703 | int num; | |
704 | } mapping_t; | |
705 | ||
e0d19036 | 706 | struct mdstat_ent { |
4dd2df09 | 707 | char devnm[32]; |
e0d19036 NB |
708 | int active; |
709 | char *level; | |
7054da69 | 710 | char *pattern; /* U for up, _ for down */ |
e0d19036 | 711 | int percent; /* -1 if no resync */ |
f94c116f | 712 | int resync; /* 3 if check, 2 if reshape, 1 if resync, 0 if recovery */ |
549e9569 NB |
713 | int devcnt; |
714 | int raid_disks; | |
549e9569 | 715 | char * metadata_version; |
3b57c466 N |
716 | struct dev_member { |
717 | char *name; | |
718 | struct dev_member *next; | |
1011e834 | 719 | } *members; |
e0d19036 NB |
720 | struct mdstat_ent *next; |
721 | }; | |
722 | ||
22a88995 | 723 | extern struct mdstat_ent *mdstat_read(int hold, int start); |
a7a0d8a1 | 724 | extern void mdstat_close(void); |
e0d19036 | 725 | extern void free_mdstat(struct mdstat_ent *ms); |
cab9c67d | 726 | extern int mdstat_wait(int seconds); |
58a4ba2a | 727 | extern void mdstat_wait_fd(int fd, const sigset_t *sigmask); |
4dd2df09 | 728 | extern int mddev_busy(char *devnm); |
3b57c466 | 729 | extern struct mdstat_ent *mdstat_by_component(char *name); |
4dd2df09 | 730 | extern struct mdstat_ent *mdstat_by_subdev(char *subdev, char *container); |
8382f19b NB |
731 | |
732 | struct map_ent { | |
733 | struct map_ent *next; | |
4dd2df09 | 734 | char devnm[32]; |
1522c538 | 735 | char metadata[20]; |
8382f19b | 736 | int uuid[4]; |
195254b8 | 737 | int bad; |
8382f19b NB |
738 | char *path; |
739 | }; | |
4dd2df09 | 740 | extern int map_update(struct map_ent **mpp, char *devnm, char *metadata, |
8382f19b | 741 | int uuid[4], char *path); |
4dd2df09 | 742 | extern void map_remove(struct map_ent **map, char *devnm); |
8382f19b | 743 | extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]); |
4dd2df09 | 744 | extern struct map_ent *map_by_devnm(struct map_ent **map, char *devnm); |
eb2306f8 | 745 | extern void map_free(struct map_ent *map); |
f2e55ecc | 746 | extern struct map_ent *map_by_name(struct map_ent **map, char *name); |
8382f19b NB |
747 | extern void map_read(struct map_ent **melp); |
748 | extern int map_write(struct map_ent *mel); | |
4dd2df09 | 749 | extern void map_delete(struct map_ent **mapp, char *devnm); |
8382f19b | 750 | extern void map_add(struct map_ent **melp, |
4dd2df09 | 751 | char *devnm, char *metadata, int uuid[4], char *path); |
ad5bc697 N |
752 | extern int map_lock(struct map_ent **melp); |
753 | extern void map_unlock(struct map_ent **melp); | |
cc700db3 | 754 | extern void map_fork(void); |
e0d19036 | 755 | |
e86c9dd6 | 756 | /* various details can be requested */ |
dab4a513 DW |
757 | enum sysfs_read_flags { |
758 | GET_LEVEL = (1 << 0), | |
759 | GET_LAYOUT = (1 << 1), | |
760 | GET_COMPONENT = (1 << 2), | |
761 | GET_CHUNK = (1 << 3), | |
762 | GET_CACHE = (1 << 4), | |
763 | GET_MISMATCH = (1 << 5), | |
764 | GET_VERSION = (1 << 6), | |
765 | GET_DISKS = (1 << 7), | |
dab4a513 | 766 | GET_SAFEMODE = (1 << 9), |
c0c1acd6 N |
767 | GET_BITMAP_LOCATION = (1 << 10), |
768 | ||
769 | GET_DEVS = (1 << 20), /* gets role, major, minor */ | |
770 | GET_OFFSET = (1 << 21), | |
771 | GET_SIZE = (1 << 22), | |
772 | GET_STATE = (1 << 23), | |
773 | GET_ERROR = (1 << 24), | |
5aa644c6 | 774 | GET_ARRAY_STATE = (1 << 25), |
5308f117 | 775 | GET_CONSISTENCY_POLICY = (1 << 26), |
ae7d61e3 | 776 | GET_DEVS_ALL = (1 << 27), |
dab4a513 | 777 | }; |
e86c9dd6 | 778 | |
90fd7001 MK |
779 | #define SYSFS_MAX_BUF_SIZE 64 |
780 | ||
14a86579 MT |
781 | extern void sysfs_get_container_devnm(struct mdinfo *mdi, char *buf); |
782 | ||
e86c9dd6 | 783 | /* If fd >= 0, get the array it is open on, |
4dd2df09 | 784 | * else use devnm. |
e86c9dd6 | 785 | */ |
4dd2df09 | 786 | extern int sysfs_open(char *devnm, char *devname, char *attr); |
dae13137 | 787 | extern int sysfs_init(struct mdinfo *mdi, int fd, char *devnm); |
a37563c9 | 788 | extern void sysfs_init_dev(struct mdinfo *mdi, dev_t devid); |
7e0f6979 | 789 | extern void sysfs_free(struct mdinfo *sra); |
4dd2df09 | 790 | extern struct mdinfo *sysfs_read(int fd, char *devnm, unsigned long options); |
1770662b DW |
791 | extern int sysfs_attr_match(const char *attr, const char *str); |
792 | extern int sysfs_match_word(const char *word, char **list); | |
7e0f6979 | 793 | extern int sysfs_set_str(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 794 | char *name, char *val); |
7e0f6979 | 795 | extern int sysfs_set_num(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 796 | char *name, unsigned long long val); |
012a8641 JS |
797 | extern int sysfs_set_num_signed(struct mdinfo *sra, struct mdinfo *dev, |
798 | char *name, long long val); | |
97590376 | 799 | extern int sysfs_uevent(struct mdinfo *sra, char *event); |
7236ee7a N |
800 | extern int sysfs_get_fd(struct mdinfo *sra, struct mdinfo *dev, |
801 | char *name); | |
802 | extern int sysfs_fd_get_ll(int fd, unsigned long long *val); | |
7e0f6979 | 803 | extern int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev, |
e86c9dd6 | 804 | char *name, unsigned long long *val); |
2eba8496 N |
805 | extern int sysfs_fd_get_two(int fd, unsigned long long *v1, unsigned long long *v2); |
806 | extern int sysfs_get_two(struct mdinfo *sra, struct mdinfo *dev, | |
807 | char *name, unsigned long long *v1, unsigned long long *v2); | |
7236ee7a | 808 | extern int sysfs_fd_get_str(int fd, char *val, int size); |
bc77ed53 DW |
809 | extern int sysfs_attribute_available(struct mdinfo *sra, struct mdinfo *dev, |
810 | char *name); | |
93ecfa01 N |
811 | extern int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev, |
812 | char *name, char *val, int size); | |
8ed3e5e1 | 813 | extern int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms); |
de23e12a | 814 | extern int sysfs_set_array(struct mdinfo *info); |
2904b26f | 815 | extern int sysfs_add_disk(struct mdinfo *sra, struct mdinfo *sd, int resume); |
f1665f72 | 816 | extern int sysfs_disk_to_scsi_id(int fd, __u32 *id); |
4dd2df09 | 817 | extern int sysfs_unique_holder(char *devnm, long rdev); |
bc77ed53 | 818 | extern int sysfs_freeze_array(struct mdinfo *sra); |
efc67e8e | 819 | extern int sysfs_wait(int fd, int *msec); |
193b6c0b | 820 | extern int load_sys(char *path, char *buf, int len); |
b2514242 | 821 | extern int zero_disk_range(int fd, unsigned long long sector, size_t count); |
130994cb AK |
822 | extern int reshape_prepare_fdlist(char *devname, |
823 | struct mdinfo *sra, | |
824 | int raid_disks, | |
825 | int nrdisks, | |
826 | unsigned long blocks, | |
827 | char *backup_file, | |
828 | int *fdlist, | |
829 | unsigned long long *offsets); | |
830 | extern void reshape_free_fdlist(int *fdlist, | |
831 | unsigned long long *offsets, | |
832 | int size); | |
e6e9d47b AK |
833 | extern int reshape_open_backup_file(char *backup, |
834 | int fd, | |
835 | char *devname, | |
836 | long blocks, | |
837 | int *fdlist, | |
a93f87ee | 838 | unsigned long long *offsets, |
54ded86f | 839 | char *sysfs_name, |
a93f87ee | 840 | int restart); |
1c009fc2 AK |
841 | extern unsigned long compute_backup_blocks(int nchunk, int ochunk, |
842 | unsigned int ndata, unsigned int odata); | |
54ded86f N |
843 | extern char *locate_backup(char *name); |
844 | extern char *make_backup(char *name); | |
e86c9dd6 NB |
845 | |
846 | extern int save_stripes(int *source, unsigned long long *offsets, | |
847 | int raid_disks, int chunk_size, int level, int layout, | |
848 | int nwrites, int *dest, | |
a6288483 N |
849 | unsigned long long start, unsigned long long length, |
850 | char *buf); | |
353632d9 NB |
851 | extern int restore_stripes(int *dest, unsigned long long *offsets, |
852 | int raid_disks, int chunk_size, int level, int layout, | |
853 | int source, unsigned long long read_offset, | |
2fcb75ae AK |
854 | unsigned long long start, unsigned long long length, |
855 | char *src_buf); | |
e86c9dd6 | 856 | |
52826846 NB |
857 | #ifndef Sendmail |
858 | #define Sendmail "/usr/lib/sendmail -t" | |
859 | #endif | |
860 | ||
773135f5 | 861 | #define SYSLOG_FACILITY LOG_DAEMON |
5f21d674 | 862 | extern char *map_num_s(mapping_t *map, int num); |
682c7051 NB |
863 | extern char *map_num(mapping_t *map, int num); |
864 | extern int map_name(mapping_t *map, char *name); | |
329dfc28 N |
865 | extern mapping_t r0layout[], r5layout[], r6layout[], |
866 | pers[], modes[], faultylayout[]; | |
2568ce89 | 867 | extern mapping_t consistency_policies[], sysfs_array_states[], update_options[]; |
682c7051 | 868 | |
c2ecf5f6 N |
869 | extern char *map_dev_preferred(int major, int minor, int create, |
870 | char *prefer); | |
871 | static inline char *map_dev(int major, int minor, int create) | |
872 | { | |
873 | return map_dev_preferred(major, minor, create, NULL); | |
874 | } | |
64c4757e | 875 | |
4389ce73 MT |
876 | /** |
877 | * is_fd_valid() - check file descriptor. | |
878 | * @fd: file descriptor. | |
879 | * | |
880 | * The function checks if @fd is nonnegative integer and shall be used only | |
881 | * to verify open() result. | |
882 | */ | |
883 | static inline int is_fd_valid(int fd) | |
884 | { | |
885 | return (fd > -1); | |
886 | } | |
887 | ||
70f1ff42 LF |
888 | /** |
889 | * is_level456() - check whether given level is between inclusive 4 and 6. | |
890 | * @level: level to check. | |
891 | * | |
892 | * Return: true if condition is met, false otherwise | |
893 | */ | |
894 | static inline bool is_level456(int level) | |
895 | { | |
896 | return (level >= 4 && level <= 6); | |
897 | } | |
898 | ||
4389ce73 MT |
899 | /** |
900 | * close_fd() - verify, close and unset file descriptor. | |
901 | * @fd: pointer to file descriptor. | |
902 | * | |
903 | * The function closes and invalidates file descriptor if appropriative. It | |
904 | * ignores incorrect file descriptor quitely to simplify error handling. | |
905 | */ | |
906 | static inline void close_fd(int *fd) | |
907 | { | |
908 | if (is_fd_valid(*fd) && close(*fd) == 0) | |
909 | *fd = -1; | |
910 | } | |
911 | ||
549e9569 | 912 | struct active_array; |
2e735d19 | 913 | struct metadata_update; |
64c4757e | 914 | |
80bf9135 | 915 | /* 'struct reshape' records the intermediate states of |
999b4972 N |
916 | * a general reshape. |
917 | * The starting geometry is converted to the 'before' geometry | |
918 | * by at most an atomic level change. They could be the same. | |
919 | * Similarly the 'after' geometry is converted to the final | |
920 | * geometry by at most a level change. | |
921 | * Note that 'before' and 'after' must have the same level. | |
922 | * 'blocks' is the minimum number of sectors for a reshape unit. | |
923 | * This will be a multiple of the stripe size in each of the | |
924 | * 'before' and 'after' geometries. | |
925 | * If 'blocks' is 0, no restriping is necessary. | |
89ecd3cf N |
926 | * 'min_offset_change' is the minimum change to data_offset to |
927 | * allow the reshape to happen. It is at least the larger of | |
928 | * the old and new chunk sizes, and typically the same as 'blocks' | |
929 | * divided by number of data disks. | |
999b4972 N |
930 | */ |
931 | struct reshape { | |
932 | int level; | |
933 | int parity; /* number of parity blocks/devices */ | |
934 | struct { | |
935 | int layout; | |
936 | int data_disks; | |
937 | } before, after; | |
938 | unsigned long long backup_blocks; | |
89ecd3cf | 939 | unsigned long long min_offset_change; |
999b4972 N |
940 | unsigned long long stripes; /* number of old stripes that comprise 'blocks'*/ |
941 | unsigned long long new_size; /* New size of array in sectors */ | |
942 | }; | |
943 | ||
1fef0c6f MT |
944 | /** |
945 | * struct dev_policy - Data structure for policy management. | |
946 | * @next: pointer to next dev_policy. | |
947 | * @name: policy name, category. | |
948 | * @metadata: the metadata type it affects. | |
949 | * @value: value of the policy. | |
950 | * | |
951 | * The functions to manipulate dev_policy lists do not free elements, so they must be statically | |
952 | * allocated. @name and @metadata can be compared by address. | |
953 | */ | |
954 | typedef struct dev_policy { | |
955 | struct dev_policy *next; | |
956 | char *name; | |
957 | const char *metadata; | |
958 | const char *value; | |
959 | } dev_policy_t; | |
960 | ||
7054da69 | 961 | /* A superswitch provides entry point to a metadata handler. |
6adfd3af | 962 | * |
74db60b0 | 963 | * The superswitch primarily operates on some "metadata" that |
6adfd3af NB |
964 | * is accessed via the 'supertype'. |
965 | * This metadata has one of three possible sources. | |
966 | * 1/ It is read from a single device. In this case it may not completely | |
967 | * describe the array or arrays as some information might be on other | |
968 | * devices. | |
969 | * 2/ It is read from all devices in a container. In this case all | |
970 | * information is present. | |
971 | * 3/ It is created by ->init_super / ->add_to_super. In this case it will | |
972 | * be complete once enough ->add_to_super calls have completed. | |
973 | * | |
974 | * When creating an array inside a container, the metadata will be | |
975 | * formed by a combination of 2 and 3. The metadata or the array is read, | |
976 | * then new information is added. | |
977 | * | |
978 | * The metadata must sometimes have a concept of a 'current' array | |
979 | * and a 'current' device. | |
980 | * The 'current' array is set by init_super to be the newly created array, | |
981 | * or is set by super_by_fd when it finds it is looking at an array inside | |
982 | * a container. | |
983 | * | |
984 | * The 'current' device is either the device that the metadata was read from | |
985 | * in case 1, or the last device added by add_to_super in case 3. | |
986 | * Case 2 does not identify a 'current' device. | |
987 | */ | |
f9ce90ba | 988 | extern struct superswitch { |
6adfd3af NB |
989 | |
990 | /* Used to report details of metadata read from a component | |
991 | * device. ->load_super has been called. | |
992 | */ | |
3da92f27 | 993 | void (*examine_super)(struct supertype *st, char *homehost); |
061f2c6a | 994 | void (*brief_examine_super)(struct supertype *st, int verbose); |
4737ae25 | 995 | void (*brief_examine_subarrays)(struct supertype *st, int verbose); |
0d726f17 | 996 | void (*export_examine_super)(struct supertype *st); |
6d388a88 | 997 | int (*examine_badblocks)(struct supertype *st, int fd, char *devname); |
74db60b0 | 998 | int (*copy_metadata)(struct supertype *st, int from, int to); |
6adfd3af NB |
999 | |
1000 | /* Used to report details of an active array. | |
1001 | * ->load_super was possibly given a 'component' string. | |
1002 | */ | |
b771faef BK |
1003 | void (*detail_super)(struct supertype *st, char *homehost, |
1004 | char *subarray); | |
1005 | void (*brief_detail_super)(struct supertype *st, char *subarray); | |
0d726f17 | 1006 | void (*export_detail_super)(struct supertype *st); |
6adfd3af | 1007 | |
4cce4069 | 1008 | /* Optional: platform hardware / firmware details */ |
9eafa1de MN |
1009 | int (*detail_platform)(int verbose, int enumerate_only, char *controller_path); |
1010 | int (*export_detail_platform)(int verbose, char *controller_path); | |
4cce4069 | 1011 | |
6adfd3af NB |
1012 | /* Used: |
1013 | * to get uuid to storing in bitmap metadata | |
1014 | * and 'reshape' backup-data metadata | |
1015 | * To see if a device is being re-added to an array it was part of. | |
1016 | */ | |
3da92f27 | 1017 | void (*uuid_from_super)(struct supertype *st, int uuid[4]); |
6adfd3af | 1018 | |
8592f29d | 1019 | /* Extract generic details from metadata. This could be details about |
6adfd3af NB |
1020 | * the container, or about an individual array within the container. |
1021 | * The determination is made either by: | |
1022 | * load_super being given a 'component' string. | |
1023 | * validate_geometry determining what to create. | |
d2ca6449 NB |
1024 | * The info includes both array information and device information. |
1025 | * The particular device should be: | |
1026 | * The last device added by add_to_super | |
1027 | * The device the metadata was loaded from by load_super | |
a5d85af7 N |
1028 | * If 'map' is present, then it is an array raid_disks long |
1029 | * (raid_disk must already be set and correct) and it is filled | |
1030 | * with 1 for slots that are thought to be active and 0 for slots which | |
1031 | * appear to be failed/missing. | |
95eeceeb | 1032 | * *info is zeroed out before data is added. |
6adfd3af | 1033 | */ |
a5d85af7 | 1034 | void (*getinfo_super)(struct supertype *st, struct mdinfo *info, char *map); |
5c4cd5da | 1035 | struct mdinfo *(*getinfo_super_disks)(struct supertype *st); |
6adfd3af | 1036 | /* Check if the given metadata is flagged as belonging to "this" |
9362c1c8 | 1037 | * host. 0 for 'no', 1 for 'yes', -1 for "Don't record homehost" |
6adfd3af | 1038 | */ |
3da92f27 | 1039 | int (*match_home)(struct supertype *st, char *homehost); |
6adfd3af NB |
1040 | |
1041 | /* Make one of several generic modifications to metadata | |
1042 | * prior to assembly (or other times). | |
1043 | * sparc2.2 - first bug in early 0.90 metadata | |
1044 | * super-minor - change name of 0.90 metadata | |
1045 | * summaries - 'correct' any redundant data | |
1046 | * resync - mark array as dirty to trigger a resync. | |
1047 | * uuid - set new uuid - only 0.90 or 1.x | |
1048 | * name - change the name of the array (where supported) | |
1049 | * homehost - change which host this array is tied to. | |
1050 | * devicesize - If metadata is at start of device, change recorded | |
1051 | * device size to match actual device size | |
1052 | * byteorder - swap bytes for 0.90 metadata | |
1053 | * | |
1054 | * force-one - mark that device as uptodate, not old or failed. | |
1055 | * force-array - mark array as clean if it would not otherwise | |
1056 | * assemble | |
1057 | * assemble - not sure how this is different from force-one... | |
1058 | * linear-grow-new - add a new device to a linear array, but don't | |
1059 | * change the size: so superblock still matches | |
1060 | * linear-grow-update - now change the size of the array. | |
16715c01 DL |
1061 | * writemostly - set the WriteMostly1 bit in the superblock devflags |
1062 | * readwrite - clear the WriteMostly1 bit in the superblock devflags | |
71574efb N |
1063 | * failfast - set the FailFast1 bit in the superblock |
1064 | * nofailfast - clear the FailFast1 bit | |
199f1a1f N |
1065 | * no-bitmap - clear any record that a bitmap is present. |
1066 | * bbl - add a bad-block-log if possible | |
6dd16dac N |
1067 | * no-bbl - remove any bad-block-log is it is empty. |
1068 | * force-no-bbl - remove any bad-block-log even if empty. | |
199f1a1f N |
1069 | * revert-reshape - If a reshape is in progress, modify metadata so |
1070 | * it will resume going in the opposite direction. | |
6adfd3af | 1071 | */ |
68c7d6d7 | 1072 | int (*update_super)(struct supertype *st, struct mdinfo *info, |
03312b52 | 1073 | enum update_opt update, |
e5eac01f NB |
1074 | char *devname, int verbose, |
1075 | int uuid_set, char *homehost); | |
6adfd3af NB |
1076 | |
1077 | /* Create new metadata for new array as described. This could | |
1078 | * be a new container, or an array in a pre-existing container. | |
1079 | * Also used to zero metadata prior to writing it to invalidate old | |
1080 | * metadata. | |
1081 | */ | |
3da92f27 | 1082 | int (*init_super)(struct supertype *st, mdu_array_info_t *info, |
5308f117 | 1083 | struct shape *s, char *name, |
83cd1e97 N |
1084 | char *homehost, int *uuid, |
1085 | unsigned long long data_offset); | |
6adfd3af NB |
1086 | |
1087 | /* update the metadata to include new device, either at create or | |
1088 | * when hot-adding a spare. | |
1089 | */ | |
f20c3968 | 1090 | int (*add_to_super)(struct supertype *st, mdu_disk_info_t *dinfo, |
72ca9bcf N |
1091 | int fd, char *devname, |
1092 | unsigned long long data_offset); | |
1a64be56 LM |
1093 | /* update the metadata to delete a device, |
1094 | * when hot-removing. | |
1095 | */ | |
1096 | int (*remove_from_super)(struct supertype *st, mdu_disk_info_t *dinfo); | |
6adfd3af NB |
1097 | |
1098 | /* Write metadata to one device when fixing problems or adding | |
1099 | * a new device. | |
1100 | */ | |
3da92f27 | 1101 | int (*store_super)(struct supertype *st, int fd); |
6adfd3af NB |
1102 | |
1103 | /* Write all metadata for this array. | |
1104 | */ | |
111d01fc | 1105 | int (*write_init_super)(struct supertype *st); |
e2f408a4 N |
1106 | /* Check if metadata read from one device is compatible with an array, |
1107 | * used when assembling an array, or pseudo-assembling was with | |
1108 | * "--examine --brief" | |
1109 | * If "st" has not yet been loaded the superblock from, "tst" is | |
1110 | * moved in, otherwise the superblock in 'st' is compared with | |
1111 | * 'tst'. | |
1112 | */ | |
c7b8547c MT |
1113 | int (*compare_super)(struct supertype *st, struct supertype *tst, |
1114 | int verbose); | |
e2f408a4 N |
1115 | /* Load metadata from a single device. If 'devname' is not NULL |
1116 | * print error messages as appropriate */ | |
3da92f27 | 1117 | int (*load_super)(struct supertype *st, int fd, char *devname); |
e2f408a4 N |
1118 | /* 'fd' is a 'container' md array - load array metadata from the |
1119 | * whole container. | |
1120 | */ | |
2b959fbf | 1121 | int (*load_container)(struct supertype *st, int fd, char *devname); |
e2f408a4 N |
1122 | /* If 'arg' is a valid name of this metadata type, allocate and |
1123 | * return a 'supertype' for the particular minor version */ | |
82d9eba6 | 1124 | struct supertype * (*match_metadata_desc)(char *arg); |
e2f408a4 N |
1125 | /* If a device has the given size, and the data_offset has been |
1126 | * requested - work out how much space is available for data. | |
1127 | * This involves adjusting for reserved space (e.g. bitmaps) | |
1128 | * and for any rounding. | |
1129 | * 'mdadm' only calls this for existing arrays where a possible | |
1130 | * spare is being added. However some super-handlers call it | |
1131 | * internally from validate_geometry when creating an array. | |
1132 | */ | |
387fcd59 N |
1133 | __u64 (*avail_size)(struct supertype *st, __u64 size, |
1134 | unsigned long long data_offset); | |
fbfdcb06 AO |
1135 | /* |
1136 | * Return spare criteria for array: | |
1137 | * - minimum disk size can be used in array; | |
4b57ecf6 | 1138 | * - sector size can be used in array. |
e2f408a4 | 1139 | */ |
f6562011 MT |
1140 | mdadm_status_t (*get_spare_criteria)(struct supertype *st, char *mddev_path, |
1141 | struct spare_criteria *sc); | |
e2f408a4 N |
1142 | /* Find somewhere to put a bitmap - possibly auto-size it - and |
1143 | * update the metadata to record this. The array may be newly | |
1144 | * created, in which case data_size may be updated, or it might | |
1145 | * already exist. Metadata handler can know if init_super | |
1146 | * has been called, but not write_init_super. | |
2ec2b7e9 JS |
1147 | * 0: Success |
1148 | * -Exxxx: On error | |
e2f408a4 | 1149 | */ |
3da92f27 | 1150 | int (*add_internal_bitmap)(struct supertype *st, int *chunkp, |
199171a2 | 1151 | int delay, int write_behind, |
f9c25f1d | 1152 | unsigned long long size, int may_change, int major); |
b554ab5c JR |
1153 | /* Perform additional setup required to activate a bitmap. |
1154 | */ | |
1155 | int (*set_bitmap)(struct supertype *st, struct mdinfo *info); | |
e2f408a4 N |
1156 | /* Seek 'fd' to start of write-intent-bitmap. Must be an |
1157 | * md-native format bitmap | |
1158 | */ | |
b138214f | 1159 | int (*locate_bitmap)(struct supertype *st, int fd, int node_num); |
e2f408a4 N |
1160 | /* if add_internal_bitmap succeeded for existing array, this |
1161 | * writes it out. | |
1162 | */ | |
0aa2f15b | 1163 | int (*write_bitmap)(struct supertype *st, int fd, enum bitmap_update update); |
e2f408a4 | 1164 | /* Free the superblock and any other allocated data */ |
3da92f27 | 1165 | void (*free_super)(struct supertype *st); |
78e44928 NB |
1166 | |
1167 | /* validate_geometry is called with an st returned by | |
1168 | * match_metadata_desc. | |
e2f408a4 | 1169 | * It should check that the geometry described is compatible with |
78e44928 NB |
1170 | * the metadata type. It will be called repeatedly as devices |
1171 | * added to validate changing size and new devices. If there are | |
1172 | * inter-device dependencies, it should record sufficient details | |
1173 | * so these can be validated. | |
30f58b22 | 1174 | * Both 'size' and '*freesize' are in sectors. chunk is KiB. |
ecbd9e81 N |
1175 | * Return value is: |
1176 | * 1: everything is OK | |
1177 | * 0: not OK for some reason - if 'verbose', then error was reported. | |
1178 | * -1: st->sb was NULL, 'subdev' is a member of a container of this | |
e2f408a4 | 1179 | * type, but array is not acceptable for some reason |
ecbd9e81 | 1180 | * message was reported even if verbose is 0. |
78e44928 | 1181 | */ |
17f25ca6 NB |
1182 | int (*validate_geometry)(struct supertype *st, int level, int layout, |
1183 | int raiddisks, | |
c21e737b | 1184 | int *chunk, unsigned long long size, |
af4348dd | 1185 | unsigned long long data_offset, |
2c514b71 | 1186 | char *subdev, unsigned long long *freesize, |
5308f117 | 1187 | int consistency_policy, int verbose); |
598f0d58 | 1188 | |
1fef0c6f MT |
1189 | /** |
1190 | * test_and_add_drive_policies() - test new and add custom policies from metadata handler. | |
1191 | * @pols: list of currently recorded policies. | |
1192 | * @disk_fd: file descriptor of the device to check. | |
1193 | * @verbose: verbose flag. | |
1194 | * | |
1195 | * Used by IMSM to verify all drives in container/array, against requirements not recored | |
1196 | * in superblock, like controller type for IMSM. It should check all drives even if | |
1197 | * they are not actually used, because mdmon or kernel are free to use any drive assigned to | |
1198 | * container automatically. | |
1199 | * | |
1200 | * Generating and comparison methods belong to metadata handler. It is not mandatory to be | |
1201 | * implemented. | |
1202 | * | |
1203 | * Return: MDADM_STATUS_SUCCESS is expected on success. | |
1204 | */ | |
1205 | mdadm_status_t (*test_and_add_drive_policies)(dev_policy_t **pols, int disk_fd, | |
1206 | const int verbose); | |
1207 | ||
e2f408a4 N |
1208 | /* Return a linked list of 'mdinfo' structures for all arrays |
1209 | * in the container. For non-containers, it is like | |
1210 | * getinfo_super with an allocated mdinfo.*/ | |
00bbdbda | 1211 | struct mdinfo *(*container_content)(struct supertype *st, char *subarray); |
30f58b22 DW |
1212 | /* query the supertype for default geometry */ |
1213 | void (*default_geometry)(struct supertype *st, int *level, int *layout, int *chunk); /* optional */ | |
33414a01 | 1214 | /* Permit subarray's to be deleted from inactive containers */ |
3364781b BK |
1215 | int (*kill_subarray)(struct supertype *st, |
1216 | char *subarray_id); /* optional */ | |
03312b52 MK |
1217 | /** |
1218 | * update_subarray() - Permit subarray to be modified. | |
1219 | * @st: Supertype. | |
1220 | * @subarray: Subarray name. | |
1221 | * @update: Update option. | |
1222 | * @ident: Optional identifiers. | |
1223 | */ | |
a951a4f7 | 1224 | int (*update_subarray)(struct supertype *st, char *subarray, |
03312b52 | 1225 | enum update_opt update, struct mddev_ident *ident); |
7bc71196 DW |
1226 | /* Check if reshape is supported for this external format. |
1227 | * st is obtained from super_by_fd() where st->subarray[0] is | |
1228 | * initialized to indicate if reshape is being performed at the | |
1229 | * container or subarray level | |
1230 | */ | |
016e00f5 AK |
1231 | #define APPLY_METADATA_CHANGES 1 |
1232 | #define ROLLBACK_METADATA_CHANGES 0 | |
1233 | ||
d04f65f4 N |
1234 | int (*reshape_super)(struct supertype *st, |
1235 | unsigned long long size, int level, | |
7bc71196 | 1236 | int layout, int chunksize, int raid_disks, |
41784c88 | 1237 | int delta_disks, char *backup, char *dev, |
016e00f5 | 1238 | int direction, |
41784c88 | 1239 | int verbose); /* optional */ |
999b4972 N |
1240 | int (*manage_reshape)( /* optional */ |
1241 | int afd, struct mdinfo *sra, struct reshape *reshape, | |
1242 | struct supertype *st, unsigned long blocks, | |
1243 | int *fds, unsigned long long *offsets, | |
1244 | int dests, int *destfd, unsigned long long *destoffsets); | |
598f0d58 | 1245 | |
549e9569 | 1246 | /* for mdmon */ |
cba0191b | 1247 | int (*open_new)(struct supertype *c, struct active_array *a, |
60815698 | 1248 | int inst); |
ed9d66aa NB |
1249 | |
1250 | /* Tell the metadata handler the current state of the array. | |
1251 | * This covers whether it is known to be consistent (no pending writes) | |
01f157d7 | 1252 | * and how far along a resync is known to have progressed |
ed9d66aa NB |
1253 | * (in a->resync_start). |
1254 | * resync status is really irrelevant if the array is not consistent, | |
1255 | * but some metadata (DDF!) have a place to record the distinction. | |
1011e834 | 1256 | * If 'consistent' is '2', then the array can mark it dirty if a |
01f157d7 N |
1257 | * resync/recovery/whatever is required, or leave it clean if not. |
1258 | * Return value is 0 dirty (not consistent) and 1 if clean. | |
1259 | * it is only really important if consistent is passed in as '2'. | |
4e5528c6 | 1260 | */ |
01f157d7 | 1261 | int (*set_array_state)(struct active_array *a, int consistent); |
7a7cc504 NB |
1262 | |
1263 | /* When the state of a device might have changed, we call set_disk to | |
1264 | * tell the metadata what the current state is. | |
1265 | * Typically this happens on spare->in_sync and (spare|in_sync)->faulty | |
1266 | * transitions. | |
1267 | * set_disk might be called when the state of the particular disk has | |
1268 | * not in fact changed. | |
1269 | */ | |
8d45d196 | 1270 | void (*set_disk)(struct active_array *a, int n, int state); |
2e735d19 NB |
1271 | void (*sync_metadata)(struct supertype *st); |
1272 | void (*process_update)(struct supertype *st, | |
1273 | struct metadata_update *update); | |
5fe6f031 N |
1274 | /* Prepare updates allocates extra memory that might be |
1275 | * needed. If the update cannot be understood, return 0. | |
1276 | */ | |
1277 | int (*prepare_update)(struct supertype *st, | |
edd8d13c | 1278 | struct metadata_update *update); |
549e9569 | 1279 | |
6c3fb95c NB |
1280 | /* activate_spare will check if the array is degraded and, if it |
1281 | * is, try to find some spare space in the container. | |
1282 | * On success, it add appropriate updates (For process_update) to | |
1283 | * to the 'updates' list and returns a list of 'mdinfo' identifying | |
1284 | * the device, or devices as there might be multiple missing | |
1285 | * devices and multiple spares available. | |
1286 | */ | |
1287 | struct mdinfo *(*activate_spare)(struct active_array *a, | |
1288 | struct metadata_update **updates); | |
549e9569 | 1289 | |
ba53ea59 AK |
1290 | /* for external backup area */ |
1291 | int (*recover_backup)(struct supertype *st, struct mdinfo *info); | |
1292 | ||
0c21b485 PB |
1293 | /* validate container after assemble */ |
1294 | int (*validate_container)(struct mdinfo *info); | |
1295 | ||
5308f117 AP |
1296 | /* write initial empty PPL on device */ |
1297 | int (*write_init_ppl)(struct supertype *st, struct mdinfo *info, int fd); | |
1298 | ||
2432ce9b AP |
1299 | /* validate ppl before assemble */ |
1300 | int (*validate_ppl)(struct supertype *st, struct mdinfo *info, | |
1301 | struct mdinfo *disk); | |
1302 | ||
1ab97c97 TM |
1303 | /* records new bad block in metadata */ |
1304 | int (*record_bad_block)(struct active_array *a, int n, | |
1305 | unsigned long long sector, int length); | |
1306 | ||
42d902d9 TM |
1307 | /* clears bad block from metadata */ |
1308 | int (*clear_bad_block)(struct active_array *a, int n, | |
1309 | unsigned long long sector, int length); | |
1310 | ||
1311 | /* get list of bad blocks from metadata */ | |
1312 | struct md_bb *(*get_bad_blocks)(struct active_array *a, int n); | |
1313 | ||
f277ce36 | 1314 | int swapuuid; /* true if uuid is bigending rather than hostendian */ |
d03373f1 | 1315 | int external; |
4cce4069 | 1316 | const char *name; /* canonical metadata name */ |
0f22b998 | 1317 | } *superlist[]; |
82d9eba6 | 1318 | |
0f22b998 N |
1319 | extern struct superswitch super0, super1; |
1320 | extern struct superswitch super_imsm, super_ddf; | |
0592faeb | 1321 | extern struct superswitch mbr, gpt; |
cdddbdbc | 1322 | |
420dafcd N |
1323 | void imsm_set_no_platform(int v); |
1324 | ||
edd8d13c NB |
1325 | struct metadata_update { |
1326 | int len; | |
1327 | char *buf; | |
1328 | void *space; /* allocated space that monitor will use */ | |
cb23f1f4 N |
1329 | void **space_list; /* list of allocated spaces that monitor can |
1330 | * use or that it returned. | |
1331 | */ | |
edd8d13c NB |
1332 | struct metadata_update *next; |
1333 | }; | |
1334 | ||
6adfd3af NB |
1335 | /* A supertype holds a particular collection of metadata. |
1336 | * It identifies the metadata type by the superswitch, and the particular | |
1337 | * sub-version of that metadata type. | |
1338 | * metadata read in or created is stored in 'sb' and 'info'. | |
1339 | * There are also fields used by mdmon to track containers. | |
1340 | * | |
352452c3 N |
1341 | * A supertype may refer to: |
1342 | * Just an array, possibly in a container | |
1343 | * A container, not identifying any particular array | |
1344 | * Info read from just one device, not yet fully describing the array/container. | |
1345 | * | |
1346 | * | |
6adfd3af NB |
1347 | * A supertype is created by: |
1348 | * super_by_fd | |
1349 | * guess_super | |
1350 | * dup_super | |
1351 | */ | |
82d9eba6 NB |
1352 | struct supertype { |
1353 | struct superswitch *ss; | |
1354 | int minor_version; | |
ea329559 | 1355 | int max_devs; |
4dd2df09 | 1356 | char container_devnm[32]; /* devnm of container */ |
64557c33 | 1357 | void *sb; |
111d01fc | 1358 | void *info; |
afa368f4 N |
1359 | void *other; /* Hack used to convert v0.90 to v1.0 */ |
1360 | unsigned long long devsize; | |
23bf42cc | 1361 | unsigned long long data_offset; /* used by v1.x only */ |
df3346e6 LM |
1362 | int ignore_hw_compat; /* used to inform metadata handlers that it should ignore |
1363 | HW/firmware related incompatability to load metadata. | |
1364 | Used when examining metadata to display content of disk | |
1365 | when user has no hw/firmare compatible system. | |
1366 | */ | |
edd8d13c NB |
1367 | struct metadata_update *updates; |
1368 | struct metadata_update **update_tail; | |
1369 | ||
549e9569 NB |
1370 | /* extra stuff used by mdmon */ |
1371 | struct active_array *arrays; | |
549e9569 | 1372 | int sock; /* listen to external programs */ |
4dd2df09 N |
1373 | char devnm[32]; /* e.g. md0. This appears in metadata_version: |
1374 | * external:/md0/12 | |
1375 | */ | |
549e9569 | 1376 | int devcnt; |
68226a80 | 1377 | int retry_soon; |
529e2aa5 | 1378 | int nodes; |
7716570e | 1379 | char *cluster_name; |
549e9569 NB |
1380 | |
1381 | struct mdinfo *devs; | |
1382 | ||
82d9eba6 | 1383 | }; |
f9ce90ba | 1384 | |
4725bc31 | 1385 | extern struct supertype *super_by_fd(int fd, char **subarray); |
54887ad8 N |
1386 | enum guess_types { guess_any, guess_array, guess_partitions }; |
1387 | extern struct supertype *guess_super_type(int fd, enum guess_types guess_type); | |
1388 | static inline struct supertype *guess_super(int fd) { | |
1389 | return guess_super_type(fd, guess_any); | |
1390 | } | |
3da92f27 | 1391 | extern struct supertype *dup_super(struct supertype *st); |
beae1dfe | 1392 | extern int get_dev_size(int fd, char *dname, unsigned long long *sizep); |
32971509 | 1393 | extern int get_dev_sector_size(int fd, char *dname, unsigned int *sectsizep); |
3a371610 | 1394 | extern int must_be_container(int fd); |
a7c6e3fb | 1395 | void wait_for(char *dev, int fd); |
f9ce90ba | 1396 | |
4e8d9f0a | 1397 | extern char pol_act[], pol_domain[], pol_metadata[], pol_auto[]; |
5527fc74 N |
1398 | |
1399 | /* iterate over the sublist starting at list, having the same | |
1400 | * 'name' as 'list', and matching the given metadata (Where | |
1401 | * NULL matches anything | |
1402 | */ | |
1403 | #define pol_for_each(item, list, _metadata) \ | |
1404 | for (item = list; \ | |
1405 | item && item->name == list->name; \ | |
1406 | item = item->next) \ | |
1407 | if (!(!_metadata || !item->metadata || _metadata == item->metadata)) \ | |
1408 | ; else | |
1409 | ||
1410 | /* | |
1411 | * policy records read from mdadm are largely just name-value pairs. | |
1412 | * The names are constants, not strdupped | |
1413 | */ | |
1414 | struct pol_rule { | |
1415 | struct pol_rule *next; | |
1416 | char *type; /* rule_policy or rule_part */ | |
1417 | struct rule { | |
1418 | struct rule *next; | |
1419 | char *name; | |
1420 | char *value; | |
1421 | char *dups; /* duplicates of 'value' with a partNN appended */ | |
1422 | } *rule; | |
1423 | }; | |
1424 | ||
1425 | extern char rule_policy[], rule_part[]; | |
1426 | extern char rule_path[], rule_type[]; | |
1427 | extern char type_part[], type_disk[]; | |
1428 | ||
1429 | extern void policyline(char *line, char *type); | |
4e8d9f0a | 1430 | extern void policy_add(char *type, ...); |
5527fc74 N |
1431 | extern void policy_free(void); |
1432 | ||
cd72f9d1 | 1433 | extern struct dev_policy *path_policy(char **paths, char *type); |
5527fc74 | 1434 | extern struct dev_policy *disk_policy(struct mdinfo *disk); |
4dd2df09 | 1435 | extern struct dev_policy *devid_policy(int devid); |
5527fc74 N |
1436 | extern void dev_policy_free(struct dev_policy *p); |
1437 | ||
e78dda3b | 1438 | extern void pol_add(struct dev_policy **pol, char *name, char *val, char *metadata); |
5527fc74 N |
1439 | extern struct dev_policy *pol_find(struct dev_policy *pol, char *name); |
1440 | ||
5a2e194c MT |
1441 | extern mdadm_status_t drive_test_and_add_policies(struct supertype *st, dev_policy_t **pols, |
1442 | int fd, const int verbose); | |
1443 | extern mdadm_status_t sysfs_test_and_add_drive_policies(struct supertype *st, dev_policy_t **pols, | |
1444 | struct mdinfo *mdi, const int verbose); | |
1445 | extern mdadm_status_t mddev_test_and_add_drive_policies(struct supertype *st, dev_policy_t **pols, | |
1446 | int array_fd, const int verbose); | |
1447 | ||
e3bb5f14 N |
1448 | enum policy_action { |
1449 | act_default, | |
1450 | act_include, | |
1451 | act_re_add, | |
d2db3045 N |
1452 | act_spare, /* This only applies to bare devices */ |
1453 | act_spare_same_slot, /* this allows non-bare devices, | |
1454 | * but only if recent removal */ | |
1455 | act_force_spare, /* this allow non-bare devices in any case */ | |
e3bb5f14 N |
1456 | act_err |
1457 | }; | |
1458 | ||
1459 | extern int policy_action_allows(struct dev_policy *plist, const char *metadata, | |
1460 | enum policy_action want); | |
1461 | extern int disk_action_allows(struct mdinfo *disk, const char *metadata, | |
1462 | enum policy_action want); | |
f5f12c84 N |
1463 | |
1464 | struct domainlist { | |
1465 | struct domainlist *next; | |
2cda7640 | 1466 | const char *dom; |
f5f12c84 N |
1467 | }; |
1468 | ||
1469 | extern int domain_test(struct domainlist *dom, struct dev_policy *pol, | |
1470 | const char *metadata); | |
1471 | extern struct domainlist *domain_from_array(struct mdinfo *mdi, | |
1472 | const char *metadata); | |
4dd2df09 | 1473 | extern void domainlist_add_dev(struct domainlist **dom, int devid, |
e78dda3b | 1474 | const char *metadata); |
f5f12c84 N |
1475 | extern void domain_free(struct domainlist *dl); |
1476 | extern void domain_merge(struct domainlist **domp, struct dev_policy *pol, | |
1477 | const char *metadata); | |
e78dda3b | 1478 | void domain_add(struct domainlist **domp, char *domain); |
f5f12c84 | 1479 | |
403410eb PC |
1480 | extern void policy_save_path(char *id_path, struct map_ent *array); |
1481 | extern int policy_check_path(struct mdinfo *disk, struct map_ent *array); | |
1482 | ||
b0681598 MD |
1483 | extern void sysfs_rules_apply(char *devnm, struct mdinfo *dev); |
1484 | extern void sysfsline(char *line); | |
1485 | ||
838acbc2 NB |
1486 | #if __GNUC__ < 3 |
1487 | struct stat64; | |
1488 | #endif | |
1489 | ||
45e878bb NB |
1490 | #define HAVE_NFTW we assume |
1491 | #define HAVE_FTW | |
1492 | ||
2df1f269 | 1493 | #ifdef __UCLIBC__ |
45e878bb | 1494 | # include <features.h> |
2df1f269 BRF |
1495 | # ifndef __UCLIBC_HAS_LFS__ |
1496 | # define lseek64 lseek | |
1497 | # endif | |
45e878bb NB |
1498 | # ifndef __UCLIBC_HAS_FTW__ |
1499 | # undef HAVE_FTW | |
1500 | # undef HAVE_NFTW | |
1501 | # endif | |
1502 | #endif | |
1503 | ||
1504 | #ifdef __dietlibc__ | |
1505 | # undef HAVE_NFTW | |
1506 | #endif | |
1507 | ||
e39b673e | 1508 | #if defined(__KLIBC__) |
1509 | # undef HAVE_NFTW | |
1510 | # undef HAVE_FTW | |
1511 | #endif | |
1512 | ||
45e878bb | 1513 | #ifndef HAVE_NFTW |
173fc515 | 1514 | # define FTW_PHYS 1 |
45e878bb NB |
1515 | # ifndef HAVE_FTW |
1516 | struct FTW {}; | |
173fc515 NB |
1517 | # endif |
1518 | #endif | |
1519 | ||
45e878bb NB |
1520 | #ifdef HAVE_FTW |
1521 | # include <ftw.h> | |
1522 | #endif | |
1523 | ||
173fc515 NB |
1524 | extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s); |
1525 | ||
64c4757e | 1526 | extern int Manage_ro(char *devname, int fd, int readonly); |
d5a40416 | 1527 | extern int Manage_run(char *devname, int fd, struct context *c); |
fe7e0e64 N |
1528 | extern int Manage_stop(char *devname, int fd, int quiet, |
1529 | int will_retry); | |
64c4757e | 1530 | extern int Manage_subdevs(char *devname, int fd, |
833bb0f8 | 1531 | struct mddev_dev *devlist, int verbose, int test, |
f2e8393b | 1532 | enum update_opt update, int force); |
1f48664b | 1533 | extern int autodetect(void); |
e5329c37 | 1534 | extern int Grow_Add_device(char *devname, int fd, char *newdev); |
50f01ba5 N |
1535 | extern int Grow_addbitmap(char *devname, int fd, |
1536 | struct context *c, struct shape *s); | |
32754b7d | 1537 | extern int Grow_reshape(char *devname, int fd, |
e2e53a2d | 1538 | struct mddev_dev *devlist, |
32754b7d | 1539 | struct context *c, struct shape *s); |
06b0d786 | 1540 | extern int Grow_restart(struct supertype *st, struct mdinfo *info, |
ea0ebe96 | 1541 | int *fdlist, int cnt, char *backup_file, int verbose); |
e9e43ec3 | 1542 | extern int Grow_continue(int mdfd, struct supertype *st, |
b76b30e0 | 1543 | struct mdinfo *info, char *backup_file, |
06e293d0 | 1544 | int forked, int freeze_reshape); |
860f11ed AP |
1545 | extern int Grow_consistency_policy(char *devname, int fd, |
1546 | struct context *c, struct shape *s); | |
b76b30e0 | 1547 | |
3f54bd62 AK |
1548 | extern int restore_backup(struct supertype *st, |
1549 | struct mdinfo *content, | |
1550 | int working_disks, | |
1551 | int spares, | |
54ded86f | 1552 | char **backup_filep, |
3f54bd62 | 1553 | int verbose); |
2dddadb0 AK |
1554 | extern int Grow_continue_command(char *devname, int fd, |
1555 | char *backup_file, int verbose); | |
64c4757e | 1556 | |
7f91af49 | 1557 | extern int Assemble(struct supertype *st, char *mddev, |
fa56eddb | 1558 | struct mddev_ident *ident, |
87f26d14 | 1559 | struct mddev_dev *devlist, |
4977146a | 1560 | struct context *c); |
64c4757e | 1561 | |
330c07f8 MT |
1562 | extern int Build(struct mddev_ident *ident, struct mddev_dev *devlist, struct shape *s, |
1563 | struct context *c); | |
1564 | ||
1565 | extern int Create(struct supertype *st, struct mddev_ident *ident, int subdevs, | |
1566 | struct mddev_dev *devlist, struct shape *s, struct context *c); | |
64c4757e | 1567 | |
ef898ce6 | 1568 | extern int Detail(char *dev, struct context *c); |
9eafa1de | 1569 | extern int Detail_Platform(struct superswitch *ss, int scan, int verbose, int export, char *controller_path); |
e0d19036 | 1570 | extern int Query(char *dev); |
6d388a88 | 1571 | extern int ExamineBadblocks(char *devname, int brief, struct supertype *forcest); |
eec3f887 N |
1572 | extern int Examine(struct mddev_dev *devlist, struct context *c, |
1573 | struct supertype *forcest); | |
a655e550 | 1574 | extern int Monitor(struct mddev_dev *devlist, |
e0d19036 | 1575 | char *mailaddr, char *alert_cmd, |
95c50205 N |
1576 | struct context *c, |
1577 | int daemonise, int oneshot, | |
1578 | int dosyslog, char *pidfile, int increments, | |
1579 | int share); | |
64c4757e | 1580 | |
ba728be7 N |
1581 | extern int Kill(char *dev, struct supertype *st, int force, int verbose, int noexcl); |
1582 | extern int Kill_subarray(char *dev, char *subarray, int verbose); | |
f2e8393b | 1583 | extern int Update_subarray(char *dev, char *subarray, enum update_opt update, struct mddev_ident *ident, int quiet); |
b90c0e9a | 1584 | extern int Wait(char *dev); |
1ea04629 | 1585 | extern int WaitClean(char *dev, int verbose); |
a740cf64 | 1586 | extern int SetAction(char *dev, char *action); |
9a9dab36 | 1587 | |
b11fe74d | 1588 | extern int Incremental(struct mddev_dev *devlist, struct context *c, |
11b6d91d | 1589 | struct supertype *st); |
8382f19b | 1590 | extern void RebuildMap(void); |
d5a40416 | 1591 | extern int IncrementalScan(struct context *c, char *devnm); |
950bc344 | 1592 | extern int IncrementalRemove(char *devname, char *path, int verbose); |
c82f047c NB |
1593 | extern int CreateBitmap(char *filename, int force, char uuid[16], |
1594 | unsigned long chunksize, unsigned long daemon_sleep, | |
dfd4d8ee | 1595 | unsigned long write_behind, |
dcec9ee5 NB |
1596 | unsigned long long array_size, |
1597 | int major); | |
55935d51 | 1598 | extern int ExamineBitmap(char *filename, int brief, struct supertype *st); |
9c030dad | 1599 | extern int IsBitmapDirty(char *filename); |
20b60dcd | 1600 | extern int Write_rules(char *rule_name); |
bf4fb153 | 1601 | extern int bitmap_update_uuid(int fd, int *uuid, int swap); |
561ad559 AP |
1602 | |
1603 | /* calculate the size of the bitmap given the array size and bitmap chunksize */ | |
1604 | static inline unsigned long long | |
1605 | bitmap_bits(unsigned long long array_size, unsigned long chunksize) | |
1606 | { | |
1607 | return (array_size * 512 + chunksize - 1) / chunksize; | |
1608 | } | |
1609 | ||
74db60b0 N |
1610 | extern int Dump_metadata(char *dev, char *dir, struct context *c, |
1611 | struct supertype *st); | |
1612 | extern int Restore_metadata(char *dev, char *dir, struct context *c, | |
1613 | struct supertype *st, int only); | |
c82f047c | 1614 | |
9db2ab4e | 1615 | int md_array_valid(int fd); |
3ab8f4bf | 1616 | int md_array_active(int fd); |
a822017f | 1617 | int md_array_is_active(struct mdinfo *info); |
9cd39f01 | 1618 | int md_get_array_info(int fd, struct mdu_array_info_s *array); |
018a4882 | 1619 | int md_set_array_info(int fd, struct mdu_array_info_s *array); |
d97572f5 | 1620 | int md_get_disk_info(int fd, struct mdu_disk_info_s *disk); |
e0d19036 | 1621 | extern int get_linux_version(void); |
bc77ed53 | 1622 | extern int mdadm_version(char *version); |
51d4261c | 1623 | extern unsigned long long parse_size(char *size); |
64c4757e | 1624 | extern int parse_uuid(char *str, int uuid[4]); |
913f07d1 | 1625 | int default_layout(struct supertype *st, int level, int verbose); |
5339f996 | 1626 | extern int is_near_layout_10(int layout); |
4a06e2c2 N |
1627 | extern int parse_layout_10(char *layout); |
1628 | extern int parse_layout_faulty(char *layout); | |
25aa7329 | 1629 | extern int parse_num(int *dest, const char *num); |
4de90913 | 1630 | extern int parse_cluster_confirm_arg(char *inp, char **devname, int *slot); |
682c7051 NB |
1631 | extern int check_ext2(int fd, char *name); |
1632 | extern int check_reiser(int fd, char *name); | |
1633 | extern int check_raid(int fd, char *name); | |
53ed6ac3 KW |
1634 | extern int check_partitions(int fd, char *dname, |
1635 | unsigned long long freesize, | |
1636 | unsigned long long size); | |
e2eb503b | 1637 | extern bool is_name_posix_compatible(const char *path); |
0a6bff09 | 1638 | extern int fstat_is_blkdev(int fd, char *devname, dev_t *rdev); |
9e04ac1c | 1639 | extern int stat_is_blkdev(char *devname, dev_t *rdev); |
64c4757e | 1640 | |
67417d92 | 1641 | extern bool is_string_lq(const char * const str, size_t max_len); |
a35aa68f | 1642 | extern bool is_dev_alive(char *path); |
dd0781e5 | 1643 | extern int get_mdp_major(void); |
cc742d38 | 1644 | extern int get_maj_min(char *dev, int *major, int *minor); |
7211116c | 1645 | extern bool is_bit_set(int *val, unsigned char index); |
8b0dabea | 1646 | extern int dev_open(char *dev, int flags); |
4dd2df09 | 1647 | extern int open_dev(char *devnm); |
8832342d | 1648 | extern void reopen_mddev(int mdfd); |
4dd2df09 N |
1649 | extern int open_dev_flags(char *devnm, int flags); |
1650 | extern int open_dev_excl(char *devnm); | |
8d80900b | 1651 | extern int is_standard(char *dev, int *nump); |
9008ed1c | 1652 | extern int same_dev(char *one, char *two); |
9eafa1de | 1653 | extern int compare_paths (char* path1,char* path2); |
a7dec3fd | 1654 | extern void enable_fds(int devices); |
ff6bb131 | 1655 | extern void manage_fork_fds(int close_all); |
723d1df4 | 1656 | extern int continue_via_systemd(char *devnm, char *service_name, char *prefix); |
dd0781e5 | 1657 | |
7fcbfd7c | 1658 | extern void ident_init(struct mddev_ident *ident); |
ae5f13a9 | 1659 | extern mdadm_status_t ident_set_devname(struct mddev_ident *ident, const char *devname); |
67417d92 | 1660 | extern mdadm_status_t ident_set_name(struct mddev_ident *ident, const char *name); |
7fcbfd7c | 1661 | |
f1ae21c4 | 1662 | extern int parse_auto(char *str, char *msg, int config); |
fa56eddb | 1663 | extern struct mddev_ident *conf_get_ident(char *dev); |
a655e550 | 1664 | extern struct mddev_dev *conf_get_devs(void); |
8382f19b | 1665 | extern int conf_test_dev(char *devname); |
4e8d9f0a | 1666 | extern int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost); |
8aec876d NB |
1667 | extern struct createinfo *conf_get_create_info(void); |
1668 | extern void set_conffile(char *file); | |
1669 | extern char *conf_get_mailaddr(void); | |
1670 | extern char *conf_get_mailfrom(void); | |
1671 | extern char *conf_get_program(void); | |
0ac91628 | 1672 | extern char *conf_get_homehost(int *require_homehostp); |
7716570e | 1673 | extern char *conf_get_homecluster(void); |
0663137c | 1674 | extern int conf_get_monitor_delay(void); |
e0d19036 | 1675 | extern char *conf_line(FILE *file); |
98c6faba | 1676 | extern char *conf_word(FILE *file, int allow_key); |
7103b9b8 | 1677 | extern void print_quoted(char *str); |
06d2ffc3 | 1678 | extern int use_udev(void); |
9935cf0f | 1679 | extern void print_escape(char *str); |
2eba8496 | 1680 | extern unsigned long GCD(unsigned long a, unsigned long b); |
0ac91628 | 1681 | extern int conf_name_is_free(char *name); |
ae5f13a9 | 1682 | extern bool is_devname_ignore(const char *devname); |
25aa7329 MT |
1683 | extern bool is_devname_md_numbered(const char *devname); |
1684 | extern bool is_devname_md_d_numbered(const char *devname); | |
7c336758 | 1685 | extern int conf_verify_devnames(struct mddev_ident *array_list); |
0ac91628 | 1686 | extern int devname_matches(char *name, char *match); |
2244d1a9 N |
1687 | extern struct mddev_ident *conf_match(struct supertype *st, |
1688 | struct mdinfo *info, | |
1689 | char *devname, | |
1690 | int verbose, int *rvp); | |
0ac91628 | 1691 | |
e0d19036 NB |
1692 | extern void free_line(char *line); |
1693 | extern int match_oneof(char *devices, char *devname); | |
e0d19036 | 1694 | extern void uuid_from_super(int uuid[4], mdp_super_t *super); |
22e263f6 | 1695 | extern const int uuid_zero[4]; |
f277ce36 | 1696 | extern int same_uuid(int a[4], int b[4], int swapuuid); |
350f29f9 | 1697 | extern void copy_uuid(void *a, int b[4], int swapuuid); |
aae5a112 | 1698 | extern char *__fname_from_uuid(int id[4], int swap, char *buf, char sep); |
ba65d917 | 1699 | extern char *fname_from_uuid(struct mdinfo *info, char *buf); |
4b1ac34b | 1700 | extern unsigned long calc_csum(void *super, int bytes); |
583315d9 | 1701 | extern int enough(int level, int raid_disks, int layout, int clean, |
de5a472e | 1702 | char *avail); |
e0d19036 | 1703 | extern int ask(char *mesg); |
8fac0577 | 1704 | extern unsigned long long get_component_size(int fd); |
0430ed48 | 1705 | extern void remove_partitions(int fd); |
691c6ee1 | 1706 | extern int test_partition(int fd); |
bfd76b93 | 1707 | extern int test_partition_from_id(dev_t id); |
577e8448 | 1708 | extern int get_data_disks(int level, int layout, int raid_disks); |
5f8097be NB |
1709 | extern unsigned long long calc_array_size(int level, int raid_disks, int layout, |
1710 | int chunksize, unsigned long long devsize); | |
edd8d13c NB |
1711 | extern int flush_metadata_updates(struct supertype *st); |
1712 | extern void append_metadata_update(struct supertype *st, void *buf, int len); | |
6234c63c | 1713 | extern int assemble_container_content(struct supertype *st, int mdfd, |
11b6d91d N |
1714 | struct mdinfo *content, |
1715 | struct context *c, | |
9ca39acb N |
1716 | char *chosen_name, int *result); |
1717 | #define INCR_NO 1 | |
1718 | #define INCR_UNSAFE 2 | |
1719 | #define INCR_ALREADY 4 | |
1720 | #define INCR_YES 8 | |
0c0f09cb | 1721 | |
51a9f2fc MT |
1722 | extern bool devid_matches_criteria(struct supertype *st, dev_t devid, struct spare_criteria *sc); |
1723 | extern bool disk_fd_matches_criteria(struct supertype *st, int disk_fd, struct spare_criteria *sc); | |
326727d9 | 1724 | extern struct mdinfo *container_choose_spares(struct supertype *st, |
fbfdcb06 | 1725 | struct spare_criteria *criteria, |
326727d9 AC |
1726 | struct domainlist *domlist, |
1727 | char *spare_group, | |
1728 | const char *metadata, int get_one); | |
d52bb542 | 1729 | extern int move_spare(char *from_devname, char *to_devname, dev_t devid); |
7801ac20 N |
1730 | extern int add_disk(int mdfd, struct supertype *st, |
1731 | struct mdinfo *sra, struct mdinfo *info); | |
de6ae750 N |
1732 | extern int remove_disk(int mdfd, struct supertype *st, |
1733 | struct mdinfo *sra, struct mdinfo *info); | |
1ab9ed2a N |
1734 | extern int hot_remove_disk(int mdfd, unsigned long dev, int force); |
1735 | extern int sys_hot_remove_disk(int statefd, int force); | |
f35f2525 | 1736 | extern int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info); |
1e5c6983 | 1737 | unsigned long long min_recovery_start(struct mdinfo *array); |
cd29a5c8 | 1738 | |
56eb10c0 | 1739 | extern char *human_size(long long bytes); |
f0ec6710 | 1740 | extern char *human_size_brief(long long bytes, int prefix); |
e4965ef8 | 1741 | extern void print_r10_layout(int layout); |
e0d19036 | 1742 | |
4dd2df09 | 1743 | extern char *find_free_devnm(int use_partitions); |
63152c1b | 1744 | |
e0d19036 | 1745 | extern void put_md_name(char *name); |
d3c40fab | 1746 | extern char *devid2kname(dev_t devid); |
13db17bd ML |
1747 | extern char *devid2devnm(dev_t devid); |
1748 | extern dev_t devnm2devid(char *devnm); | |
4dd2df09 | 1749 | extern char *get_md_name(char *devnm); |
e0d19036 | 1750 | |
c913b90e | 1751 | extern char DefaultConfFile[]; |
b5e64645 | 1752 | |
69207ff6 | 1753 | extern int create_mddev(char *dev, char *name, int autof, int trustworthy, |
cd6cbb08 | 1754 | char *chosen, int block_udev); |
69207ff6 N |
1755 | /* values for 'trustworthy' */ |
1756 | #define LOCAL 1 | |
d1d3482b | 1757 | #define LOCAL_ANY 10 |
69207ff6 N |
1758 | #define FOREIGN 2 |
1759 | #define METADATA 3 | |
6be1d39d | 1760 | extern int open_mddev(char *dev, int report_errors); |
e702f392 | 1761 | extern int is_mddev(char *dev); |
a322f70c | 1762 | extern int open_container(int fd); |
4dd2df09 N |
1763 | extern int metadata_container_matches(char *metadata, char *devnm); |
1764 | extern int metadata_subdev_matches(char *metadata, char *devnm); | |
33414a01 DW |
1765 | extern int is_container_member(struct mdstat_ent *ent, char *devname); |
1766 | extern int is_subarray_active(char *subarray, char *devname); | |
feab51f8 | 1767 | extern int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet); |
33414a01 | 1768 | extern struct superswitch *version_to_superswitch(char *vers); |
b5e64645 | 1769 | |
4dd2df09 N |
1770 | extern int mdmon_running(char *devnm); |
1771 | extern int mdmon_pid(char *devnm); | |
40ebbb9c | 1772 | extern int check_env(char *name); |
148acb7b | 1773 | extern __u32 random32(void); |
c5f71c24 | 1774 | extern void random_uuid(__u8 *buf); |
4dd2df09 | 1775 | extern int start_mdmon(char *devnm); |
a931db9e | 1776 | |
999b4972 N |
1777 | extern int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, |
1778 | struct supertype *st, unsigned long stripes, | |
1779 | int *fds, unsigned long long *offsets, | |
1780 | int dests, int *destfd, unsigned long long *destoffsets); | |
10f22854 | 1781 | void abort_reshape(struct mdinfo *sra); |
999b4972 | 1782 | |
afa368f4 N |
1783 | void *super1_make_v0(struct supertype *st, struct mdinfo *info, mdp_super_t *sb0); |
1784 | ||
f96b1302 AP |
1785 | extern char *stat2kname(struct stat *st); |
1786 | extern char *fd2kname(int fd); | |
4dd2df09 | 1787 | extern char *stat2devnm(struct stat *st); |
27ad4900 | 1788 | bool stat_is_md_dev(struct stat *st); |
4dd2df09 | 1789 | extern char *fd2devnm(int fd); |
a931db9e | 1790 | |
a9c15847 | 1791 | extern int in_initrd(void); |
d15a1f72 | 1792 | |
e80357f8 GJ |
1793 | struct cmap_hooks { |
1794 | void *cmap_handle; /* corosync lib related */ | |
1795 | ||
1796 | int (*initialize)(cmap_handle_t *handle); | |
1797 | int (*get_string)(cmap_handle_t handle, | |
1798 | const char *string, | |
1799 | char **name); | |
1800 | int (*finalize)(cmap_handle_t handle); | |
1801 | }; | |
1802 | ||
1803 | extern void set_cmap_hooks(void); | |
1804 | extern void set_hooks(void); | |
1805 | ||
d15a1f72 GJ |
1806 | struct dlm_hooks { |
1807 | void *dlm_handle; /* dlm lib related */ | |
1808 | ||
1809 | dlm_lshandle_t (*create_lockspace)(const char *name, | |
1810 | unsigned int mode); | |
1b7eb962 | 1811 | dlm_lshandle_t (*open_lockspace)(const char *name); |
d15a1f72 GJ |
1812 | int (*release_lockspace)(const char *name, dlm_lshandle_t ls, |
1813 | int force); | |
1814 | int (*ls_lock)(dlm_lshandle_t lockspace, uint32_t mode, | |
1815 | struct dlm_lksb *lksb, uint32_t flags, | |
1816 | const void *name, unsigned int namelen, | |
1817 | uint32_t parent, void (*astaddr) (void *astarg), | |
1818 | void *astarg, void (*bastaddr) (void *astarg), | |
1819 | void *range); | |
1b7eb962 GJ |
1820 | int (*ls_unlock_wait)(dlm_lshandle_t lockspace, uint32_t lkid, |
1821 | uint32_t flags, struct dlm_lksb *lksb); | |
d15a1f72 GJ |
1822 | int (*ls_get_fd)(dlm_lshandle_t ls); |
1823 | int (*dispatch)(int fd); | |
1824 | }; | |
1825 | ||
7716570e | 1826 | extern int get_cluster_name(char **name); |
81a8a694 | 1827 | extern int dlm_funs_ready(void); |
1b7eb962 GJ |
1828 | extern int cluster_get_dlmlock(void); |
1829 | extern int cluster_release_dlmlock(void); | |
d15a1f72 | 1830 | extern void set_dlm_hooks(void); |
a9c15847 | 1831 | |
239b3cc0 MG |
1832 | #define MSEC_TO_NSEC(msec) ((msec) * 1000000) |
1833 | #define USEC_TO_NSEC(usec) ((usec) * 1000) | |
1834 | extern void sleep_for(unsigned int sec, long nsec, bool wake_after_interrupt); | |
ee9dcf95 MG |
1835 | extern bool is_directory(const char *path); |
1836 | extern bool is_file(const char *path); | |
21e622f2 | 1837 | extern int s_gethostname(char *buf, int buf_len); |
239b3cc0 | 1838 | |
2d762ade | 1839 | #define _ROUND_UP(val, base) (((val) + (base) - 1) & ~(base - 1)) |
de897065 JS |
1840 | #define ROUND_UP(val, base) _ROUND_UP(val, (typeof(val))(base)) |
1841 | #define ROUND_UP_PTR(ptr, base) ((typeof(ptr)) \ | |
1842 | (ROUND_UP((unsigned long)(ptr), base))) | |
6416d527 | 1843 | |
3c558363 N |
1844 | static inline int is_subarray(char *vers) |
1845 | { | |
e9dd1598 | 1846 | /* The version string for a 'subarray' (an array in a container) |
1011e834 | 1847 | * is |
e9dd1598 | 1848 | * /containername/componentname for normal read-write arrays |
746a6567 N |
1849 | * -containername/componentname for arrays which mdmon must not |
1850 | * reconfigure. They might be read-only | |
1851 | * or might be undergoing reshape etc. | |
e9dd1598 N |
1852 | * containername is e.g. md0, md_d1 |
1853 | * componentname is dependant on the metadata. e.g. '1' 'S1' ... | |
1854 | */ | |
1855 | return (*vers == '/' || *vers == '-'); | |
3c558363 N |
1856 | } |
1857 | ||
e5408a32 DW |
1858 | static inline char *to_subarray(struct mdstat_ent *ent, char *container) |
1859 | { | |
1860 | return &ent->metadata_version[10+strlen(container)+1]; | |
1861 | } | |
1862 | ||
83a379cf LF |
1863 | /** |
1864 | * signal_s() - Wrapper for sigaction() with signal()-like interface. | |
1865 | * @sig: The signal to set the signal handler to. | |
1866 | * @handler: The signal handler. | |
1867 | * | |
1868 | * Return: previous handler or SIG_ERR on failure. | |
1869 | */ | |
1870 | static inline sighandler_t signal_s(int sig, sighandler_t handler) | |
1871 | { | |
38cb95dd MK |
1872 | struct sigaction new_act = {0}; |
1873 | struct sigaction old_act = {0}; | |
83a379cf LF |
1874 | |
1875 | new_act.sa_handler = handler; | |
83a379cf LF |
1876 | |
1877 | if (sigaction(sig, &new_act, &old_act) == 0) | |
1878 | return old_act.sa_handler; | |
1879 | ||
1880 | return SIG_ERR; | |
1881 | } | |
1882 | ||
2a24d7b6 DW |
1883 | #ifdef DEBUG |
1884 | #define dprintf(fmt, arg...) \ | |
1ade5cc1 N |
1885 | fprintf(stderr, "%s: %s: "fmt, Name, __func__, ##arg) |
1886 | #define dprintf_cont(fmt, arg...) \ | |
2a24d7b6 DW |
1887 | fprintf(stderr, fmt, ##arg) |
1888 | #else | |
1889 | #define dprintf(fmt, arg...) \ | |
1ade5cc1 N |
1890 | ({ if (0) fprintf(stderr, "%s: %s: " fmt, Name, __func__, ##arg); 0; }) |
1891 | #define dprintf_cont(fmt, arg...) \ | |
2a24d7b6 DW |
1892 | ({ if (0) fprintf(stderr, fmt, ##arg); 0; }) |
1893 | #endif | |
7fcbfd7c | 1894 | |
1a0ee0ba DK |
1895 | static inline int xasprintf(char **strp, const char *fmt, ...) { |
1896 | va_list ap; | |
1897 | int ret; | |
1898 | va_start(ap, fmt); | |
089485cb | 1899 | ret = vasprintf(strp, fmt, ap); |
1a0ee0ba DK |
1900 | va_end(ap); |
1901 | assert(ret >= 0); | |
1902 | return ret; | |
1903 | } | |
2a24d7b6 | 1904 | |
1ade5cc1 N |
1905 | #ifdef DEBUG |
1906 | #define pr_err(fmt, args...) fprintf(stderr, "%s: %s: "fmt, Name, __func__, ##args) | |
1907 | #else | |
d56dd607 | 1908 | #define pr_err(fmt, args...) fprintf(stderr, "%s: "fmt, Name, ##args) |
1ade5cc1 | 1909 | #endif |
e7b84f9d N |
1910 | #define cont_err(fmt ...) fprintf(stderr, " " fmt) |
1911 | ||
9364dbfb LG |
1912 | #define pr_info(fmt, args...) printf("%s: "fmt, Name, ##args) |
1913 | ||
cc75b0fa BK |
1914 | #define pr_vrb(fmt, arg...) ((void)(verbose && pr_err(fmt, ##arg))) |
1915 | ||
503975b9 N |
1916 | void *xmalloc(size_t len); |
1917 | void *xrealloc(void *ptr, size_t len); | |
1918 | void *xcalloc(size_t num, size_t size); | |
1919 | char *xstrdup(const char *str); | |
1920 | ||
b5e64645 NB |
1921 | #define LEVEL_MULTIPATH (-4) |
1922 | #define LEVEL_LINEAR (-1) | |
1923 | #define LEVEL_FAULTY (-5) | |
1924 | ||
17f25ca6 NB |
1925 | /* kernel module doesn't know about these */ |
1926 | #define LEVEL_CONTAINER (-100) | |
a322f70c | 1927 | #define LEVEL_UNSUPPORTED (-200) |
17f25ca6 | 1928 | |
56cb05c4 N |
1929 | /* the kernel does know about this one ... */ |
1930 | #define LEVEL_NONE (-1000000) | |
1931 | ||
b5e64645 NB |
1932 | /* faulty stuff */ |
1933 | ||
1934 | #define WriteTransient 0 | |
1935 | #define ReadTransient 1 | |
1936 | #define WritePersistent 2 | |
1937 | #define ReadPersistent 3 | |
1938 | #define WriteAll 4 /* doesn't go to device */ | |
1939 | #define ReadFixable 5 | |
1940 | #define Modes 6 | |
1941 | ||
1942 | #define ClearErrors 31 | |
1943 | #define ClearFaults 30 | |
1944 | ||
1945 | #define AllPersist 100 /* internal use only */ | |
1946 | #define NoPersist 101 | |
1947 | ||
1948 | #define ModeMask 0x1f | |
1949 | #define ModeShift 5 | |
fe6729fa | 1950 | |
fe6729fa NB |
1951 | #ifdef __TINYC__ |
1952 | #undef minor | |
1953 | #undef major | |
1954 | #undef makedev | |
1955 | #define minor(x) ((x)&0xff) | |
1956 | #define major(x) (((x)>>8)&0xff) | |
1957 | #define makedev(M,m) (((M)<<8) | (m)) | |
1958 | #endif | |
1959 | ||
329dfc28 N |
1960 | enum r0layout { |
1961 | RAID0_ORIG_LAYOUT = 1, | |
1962 | RAID0_ALT_MULTIZONE_LAYOUT = 2, | |
1963 | }; | |
1964 | ||
b640a252 | 1965 | /* for raid4/5/6 */ |
e86c9dd6 NB |
1966 | #define ALGORITHM_LEFT_ASYMMETRIC 0 |
1967 | #define ALGORITHM_RIGHT_ASYMMETRIC 1 | |
1968 | #define ALGORITHM_LEFT_SYMMETRIC 2 | |
1969 | #define ALGORITHM_RIGHT_SYMMETRIC 3 | |
b640a252 N |
1970 | |
1971 | /* Define non-rotating (raid4) algorithms. These allow | |
1972 | * conversion of raid4 to raid5. | |
1973 | */ | |
1974 | #define ALGORITHM_PARITY_0 4 /* P or P,Q are initial devices */ | |
1975 | #define ALGORITHM_PARITY_N 5 /* P or P,Q are final devices. */ | |
1976 | ||
1977 | /* DDF RAID6 layouts differ from md/raid6 layouts in two ways. | |
1978 | * Firstly, the exact positioning of the parity block is slightly | |
1979 | * different between the 'LEFT_*' modes of md and the "_N_*" modes | |
1980 | * of DDF. | |
1981 | * Secondly, or order of datablocks over which the Q syndrome is computed | |
1982 | * is different. | |
1983 | * Consequently we have different layouts for DDF/raid6 than md/raid6. | |
1984 | * These layouts are from the DDFv1.2 spec. | |
1985 | * Interestingly DDFv1.2-Errata-A does not specify N_CONTINUE but | |
1986 | * leaves RLQ=3 as 'Vendor Specific' | |
1987 | */ | |
1988 | ||
1989 | #define ALGORITHM_ROTATING_ZERO_RESTART 8 /* DDF PRL=6 RLQ=1 */ | |
1990 | #define ALGORITHM_ROTATING_N_RESTART 9 /* DDF PRL=6 RLQ=2 */ | |
1991 | #define ALGORITHM_ROTATING_N_CONTINUE 10 /*DDF PRL=6 RLQ=3 */ | |
1992 | ||
b640a252 N |
1993 | /* For every RAID5 algorithm we define a RAID6 algorithm |
1994 | * with exactly the same layout for data and parity, and | |
1995 | * with the Q block always on the last device (N-1). | |
1996 | * This allows trivial conversion from RAID5 to RAID6 | |
1997 | */ | |
1998 | #define ALGORITHM_LEFT_ASYMMETRIC_6 16 | |
1999 | #define ALGORITHM_RIGHT_ASYMMETRIC_6 17 | |
2000 | #define ALGORITHM_LEFT_SYMMETRIC_6 18 | |
2001 | #define ALGORITHM_RIGHT_SYMMETRIC_6 19 | |
2002 | #define ALGORITHM_PARITY_0_6 20 | |
2003 | #define ALGORITHM_PARITY_N_6 ALGORITHM_PARITY_N | |
2004 | ||
33a6535d AW |
2005 | /* Define PATH_MAX in case we don't use glibc or standard library does |
2006 | * not have PATH_MAX defined. Assume max path length is 4K characters. | |
2007 | */ | |
2008 | #ifndef PATH_MAX | |
2009 | #define PATH_MAX 4096 | |
2010 | #endif | |
2011 | ||
9dad51d4 N |
2012 | #define RESYNC_NONE -1 |
2013 | #define RESYNC_DELAYED -2 | |
2014 | #define RESYNC_PENDING -3 | |
1c294b5d LZ |
2015 | #define RESYNC_REMOTE -4 |
2016 | #define RESYNC_UNKNOWN -5 | |
a0963a86 | 2017 | |
480f3566 N |
2018 | /* When using "GET_DISK_INFO" it isn't certain how high |
2019 | * we need to check. So we impose an absolute limit of | |
2020 | * MAX_DISKS. This needs to be much more than the largest | |
2021 | * number of devices any metadata can support. Currently | |
2022 | * v1.x can support 1920 | |
2023 | */ | |
2024 | #define MAX_DISKS 4096 | |
2025 | ||
d04f65f4 N |
2026 | /* Sometimes the 'size' value passed needs to mean "Maximum". |
2027 | * In those cases with use MAX_SIZE | |
2028 | */ | |
2029 | #define MAX_SIZE 1 | |
822e393a N |
2030 | |
2031 | /* We want to use unsigned numbers for sector counts, but need | |
2032 | * a value for 'invalid'. Use '1'. | |
2033 | */ | |
2034 | #define INVALID_SECTORS 1 | |
72ca9bcf N |
2035 | /* And another special number needed for --data_offset=variable */ |
2036 | #define VARIABLE_OFFSET 3 | |
ced5fa8b | 2037 | |
6f2af6a4 KT |
2038 | /** |
2039 | * is_container() - check if @level is &LEVEL_CONTAINER | |
2040 | * @level: level value | |
2041 | * | |
2042 | * return: | |
2043 | * 1 if level is equal to &LEVEL_CONTAINER, 0 otherwise. | |
2044 | */ | |
2045 | static inline int is_container(const int level) | |
2046 | { | |
2047 | if (level == LEVEL_CONTAINER) | |
2048 | return 1; | |
2049 | return 0; | |
2050 | } | |
b823c8f9 MK |
2051 | |
2052 | #define STR_COMMON_NONE "none" | |
2053 | ||
2054 | /** | |
2055 | * str_is_none() - check if @str starts with "none". | |
2056 | * @str: string | |
2057 | * | |
2058 | * return: | |
2059 | * true if string starts with "none", false otherwise. | |
2060 | */ | |
2061 | static inline bool str_is_none(char *str) | |
2062 | { | |
2063 | if (strncmp(str, STR_COMMON_NONE, sizeof(STR_COMMON_NONE) - 1) == 0) | |
2064 | return true; | |
2065 | return false; | |
2066 | } |