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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 | ||
9a9dab36 | 25 | #include "mdadm.h" |
64c4757e | 26 | #include "md_p.h" |
edd8d13c | 27 | #include <sys/socket.h> |
64c4757e | 28 | #include <sys/utsname.h> |
9fe32043 | 29 | #include <sys/wait.h> |
edd8d13c | 30 | #include <sys/un.h> |
98c6faba | 31 | #include <ctype.h> |
a322f70c | 32 | #include <dirent.h> |
a931db9e | 33 | #include <signal.h> |
0a816ef9 NB |
34 | |
35 | /* | |
36 | * following taken from linux/blkpg.h because they aren't | |
37 | * anywhere else and it isn't safe to #include linux/ * stuff. | |
38 | */ | |
39 | ||
40 | #define BLKPG _IO(0x12,105) | |
41 | ||
42 | /* The argument structure */ | |
43 | struct blkpg_ioctl_arg { | |
44 | int op; | |
45 | int flags; | |
46 | int datalen; | |
47 | void *data; | |
48 | }; | |
49 | ||
50 | /* The subfunctions (for the op field) */ | |
51 | #define BLKPG_ADD_PARTITION 1 | |
52 | #define BLKPG_DEL_PARTITION 2 | |
53 | ||
54 | /* Sizes of name fields. Unused at present. */ | |
55 | #define BLKPG_DEVNAMELTH 64 | |
56 | #define BLKPG_VOLNAMELTH 64 | |
57 | ||
58 | /* The data structure for ADD_PARTITION and DEL_PARTITION */ | |
59 | struct blkpg_partition { | |
60 | long long start; /* starting offset in bytes */ | |
61 | long long length; /* length in bytes */ | |
62 | int pno; /* partition number */ | |
63 | char devname[BLKPG_DEVNAMELTH]; /* partition name, like sda5 or c0d1p2, | |
64 | to be used in kernel messages */ | |
65 | char volname[BLKPG_VOLNAMELTH]; /* volume label */ | |
66 | }; | |
64c4757e | 67 | |
0f22b998 | 68 | #include "part.h" |
056b331e N |
69 | |
70 | /* Force a compilation error if condition is true */ | |
71 | #define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition)) | |
72 | ||
73 | /* Force a compilation error if condition is true, but also produce a | |
74 | result (of value 0 and type size_t), so the expression can be used | |
75 | e.g. in a structure initializer (or where-ever else comma expressions | |
76 | aren't permitted). */ | |
77 | #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) | |
78 | ||
64c4757e NB |
79 | /* |
80 | * Parse a 128 bit uuid in 4 integers | |
81 | * format is 32 hexx nibbles with options :.<space> separator | |
82 | * If not exactly 32 hex digits are found, return 0 | |
83 | * else return 1 | |
84 | */ | |
85 | int parse_uuid(char *str, int uuid[4]) | |
86 | { | |
aba69144 NB |
87 | int hit = 0; /* number of Hex digIT */ |
88 | int i; | |
89 | char c; | |
90 | for (i=0; i<4; i++) uuid[i]=0; | |
91 | ||
92 | while ((c= *str++)) { | |
93 | int n; | |
94 | if (c>='0' && c<='9') | |
95 | n = c-'0'; | |
96 | else if (c>='a' && c <= 'f') | |
97 | n = 10 + c - 'a'; | |
98 | else if (c>='A' && c <= 'F') | |
99 | n = 10 + c - 'A'; | |
100 | else if (strchr(":. -", c)) | |
101 | continue; | |
102 | else return 0; | |
103 | ||
104 | if (hit<32) { | |
105 | uuid[hit/8] <<= 4; | |
106 | uuid[hit/8] += n; | |
107 | } | |
108 | hit++; | |
82b27616 | 109 | } |
aba69144 NB |
110 | if (hit == 32) |
111 | return 1; | |
112 | return 0; | |
64c4757e NB |
113 | } |
114 | ||
115 | ||
116 | /* | |
117 | * Get the md version number. | |
118 | * We use the RAID_VERSION ioctl if it is supported | |
119 | * If not, but we have a block device with major '9', we assume | |
120 | * 0.36.0 | |
121 | * | |
122 | * Return version number as 24 but number - assume version parts | |
123 | * always < 255 | |
124 | */ | |
125 | ||
126 | int md_get_version(int fd) | |
127 | { | |
128 | struct stat stb; | |
129 | mdu_version_t vers; | |
130 | ||
131 | if (fstat(fd, &stb)<0) | |
132 | return -1; | |
133 | if ((S_IFMT&stb.st_mode) != S_IFBLK) | |
134 | return -1; | |
135 | ||
136 | if (ioctl(fd, RAID_VERSION, &vers) == 0) | |
682c7051 | 137 | return (vers.major*10000) + (vers.minor*100) + vers.patchlevel; |
5787fa49 NB |
138 | if (errno == EACCES) |
139 | return -1; | |
0df46c2a | 140 | if (major(stb.st_rdev) == MD_MAJOR) |
682c7051 | 141 | return (3600); |
64c4757e NB |
142 | return -1; |
143 | } | |
144 | ||
64c4757e NB |
145 | int get_linux_version() |
146 | { | |
147 | struct utsname name; | |
98c6faba | 148 | char *cp; |
64c4757e NB |
149 | int a,b,c; |
150 | if (uname(&name) <0) | |
151 | return -1; | |
152 | ||
98c6faba NB |
153 | cp = name.release; |
154 | a = strtoul(cp, &cp, 10); | |
155 | if (*cp != '.') return -1; | |
156 | b = strtoul(cp+1, &cp, 10); | |
157 | if (*cp != '.') return -1; | |
158 | c = strtoul(cp+1, NULL, 10); | |
159 | ||
682c7051 | 160 | return (a*1000000)+(b*1000)+c; |
64c4757e NB |
161 | } |
162 | ||
bc77ed53 DW |
163 | int mdadm_version(char *version) |
164 | { | |
165 | int a, b, c; | |
166 | char *cp; | |
167 | ||
168 | if (!version) | |
169 | version = Version; | |
170 | ||
171 | cp = strchr(version, '-'); | |
172 | if (!cp || *(cp+1) != ' ' || *(cp+2) != 'v') | |
173 | return -1; | |
174 | cp += 3; | |
175 | a = strtoul(cp, &cp, 10); | |
176 | if (*cp != '.') | |
177 | return -1; | |
178 | b = strtoul(cp+1, &cp, 10); | |
179 | if (*cp == '.') | |
180 | c = strtoul(cp+1, &cp, 10); | |
181 | else | |
182 | c = 0; | |
183 | if (*cp != ' ' && *cp != '-') | |
184 | return -1; | |
185 | return (a*1000000)+(b*1000)+c; | |
186 | } | |
187 | ||
eb3929a4 | 188 | #ifndef MDASSEMBLE |
84e11361 N |
189 | long long parse_size(char *size) |
190 | { | |
191 | /* parse 'size' which should be a number optionally | |
192 | * followed by 'K', 'M', or 'G'. | |
193 | * Without a suffix, K is assumed. | |
194 | * Number returned is in sectors (half-K) | |
195 | */ | |
196 | char *c; | |
197 | long long s = strtoll(size, &c, 10); | |
198 | if (s > 0) { | |
199 | switch (*c) { | |
200 | case 'K': | |
201 | c++; | |
202 | default: | |
203 | s *= 2; | |
204 | break; | |
205 | case 'M': | |
206 | c++; | |
207 | s *= 1024 * 2; | |
208 | break; | |
209 | case 'G': | |
210 | c++; | |
211 | s *= 1024 * 1024 * 2; | |
212 | break; | |
213 | } | |
214 | } | |
215 | if (*c) | |
216 | s = 0; | |
217 | return s; | |
218 | } | |
219 | ||
4a06e2c2 N |
220 | int parse_layout_10(char *layout) |
221 | { | |
222 | int copies, rv; | |
223 | char *cp; | |
224 | /* Parse the layout string for raid10 */ | |
225 | /* 'f', 'o' or 'n' followed by a number <= raid_disks */ | |
226 | if ((layout[0] != 'n' && layout[0] != 'f' && layout[0] != 'o') || | |
227 | (copies = strtoul(layout+1, &cp, 10)) < 1 || | |
228 | copies > 200 || | |
229 | *cp) | |
230 | return -1; | |
231 | if (layout[0] == 'n') | |
232 | rv = 256 + copies; | |
233 | else if (layout[0] == 'o') | |
234 | rv = 0x10000 + (copies<<8) + 1; | |
235 | else | |
236 | rv = 1 + (copies<<8); | |
237 | return rv; | |
238 | } | |
239 | ||
240 | int parse_layout_faulty(char *layout) | |
241 | { | |
242 | /* Parse the layout string for 'faulty' */ | |
243 | int ln = strcspn(layout, "0123456789"); | |
244 | char *m = strdup(layout); | |
245 | int mode; | |
246 | m[ln] = 0; | |
247 | mode = map_name(faultylayout, m); | |
248 | if (mode == UnSet) | |
249 | return -1; | |
250 | ||
251 | return mode | (atoi(layout+ln)<< ModeShift); | |
252 | } | |
eb3929a4 | 253 | #endif |
4a06e2c2 | 254 | |
0430ed48 NB |
255 | void remove_partitions(int fd) |
256 | { | |
257 | /* remove partitions from this block devices. | |
258 | * This is used for components added to an array | |
259 | */ | |
260 | #ifdef BLKPG_DEL_PARTITION | |
261 | struct blkpg_ioctl_arg a; | |
262 | struct blkpg_partition p; | |
263 | ||
264 | a.op = BLKPG_DEL_PARTITION; | |
265 | a.data = (void*)&p; | |
266 | a.datalen = sizeof(p); | |
267 | a.flags = 0; | |
268 | memset(a.data, 0, a.datalen); | |
269 | for (p.pno=0; p.pno < 16; p.pno++) | |
270 | ioctl(fd, BLKPG, &a); | |
271 | #endif | |
272 | } | |
273 | ||
691c6ee1 N |
274 | int test_partition(int fd) |
275 | { | |
276 | /* Check if fd is a whole-disk or a partition. | |
277 | * BLKPG will return EINVAL on a partition, and BLKPG_DEL_PARTITION | |
278 | * will return ENXIO on an invalid partition number. | |
279 | */ | |
280 | struct blkpg_ioctl_arg a; | |
281 | struct blkpg_partition p; | |
282 | a.op = BLKPG_DEL_PARTITION; | |
283 | a.data = (void*)&p; | |
284 | a.datalen = sizeof(p); | |
285 | a.flags = 0; | |
286 | memset(a.data, 0, a.datalen); | |
287 | p.pno = 1<<30; | |
288 | if (ioctl(fd, BLKPG, &a) == 0) | |
289 | /* Very unlikely, but not a partition */ | |
290 | return 0; | |
291 | if (errno == ENXIO) | |
292 | /* not a partition */ | |
293 | return 0; | |
294 | ||
295 | return 1; | |
296 | } | |
297 | ||
298 | ||
583315d9 | 299 | int enough(int level, int raid_disks, int layout, int clean, |
265e0f17 | 300 | char *avail, int avail_disks) |
64c4757e | 301 | { |
265e0f17 | 302 | int copies, first; |
64c4757e | 303 | switch (level) { |
265e0f17 NB |
304 | case 10: |
305 | /* This is the tricky one - we need to check | |
306 | * which actual disks are present. | |
307 | */ | |
702b557b | 308 | copies = (layout&255)* ((layout>>8) & 255); |
265e0f17 NB |
309 | first=0; |
310 | do { | |
311 | /* there must be one of the 'copies' form 'first' */ | |
312 | int n = copies; | |
313 | int cnt=0; | |
314 | while (n--) { | |
315 | if (avail[first]) | |
316 | cnt++; | |
317 | first = (first+1) % raid_disks; | |
318 | } | |
319 | if (cnt == 0) | |
320 | return 0; | |
321 | ||
322 | } while (first != 0); | |
323 | return 1; | |
e5329c37 | 324 | |
df0d4ea0 | 325 | case LEVEL_MULTIPATH: |
e0d19036 | 326 | return avail_disks>= 1; |
df0d4ea0 | 327 | case LEVEL_LINEAR: |
64c4757e NB |
328 | case 0: |
329 | return avail_disks == raid_disks; | |
330 | case 1: | |
331 | return avail_disks >= 1; | |
332 | case 4: | |
333 | case 5: | |
583315d9 NB |
334 | if (clean) |
335 | return avail_disks >= raid_disks-1; | |
336 | else | |
337 | return avail_disks >= raid_disks; | |
98c6faba | 338 | case 6: |
583315d9 NB |
339 | if (clean) |
340 | return avail_disks >= raid_disks-2; | |
341 | else | |
342 | return avail_disks >= raid_disks; | |
64c4757e NB |
343 | default: |
344 | return 0; | |
345 | } | |
346 | } | |
347 | ||
8453e704 N |
348 | int enough_fd(int fd) |
349 | { | |
350 | struct mdu_array_info_s array; | |
351 | struct mdu_disk_info_s disk; | |
352 | int avail_disks = 0; | |
353 | int i; | |
354 | char *avail; | |
355 | ||
356 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0 || | |
357 | array.raid_disks <= 0) | |
358 | return 0; | |
359 | avail = calloc(array.raid_disks, 1); | |
360 | for (i=0; i<array.raid_disks + array.nr_disks; i++) { | |
361 | disk.number = i; | |
362 | if (ioctl(fd, GET_DISK_INFO, &disk) != 0) | |
363 | continue; | |
364 | if (! (disk.state & (1<<MD_DISK_SYNC))) | |
365 | continue; | |
366 | if (disk.raid_disk < 0 || disk.raid_disk >= array.raid_disks) | |
367 | continue; | |
368 | avail_disks++; | |
369 | avail[disk.raid_disk] = 1; | |
370 | } | |
371 | /* This is used on an active array, so assume it is clean */ | |
372 | return enough(array.level, array.raid_disks, array.layout, | |
373 | 1, | |
374 | avail, avail_disks); | |
375 | } | |
376 | ||
377 | ||
36ba7d48 | 378 | const int uuid_match_any[4] = { ~0, ~0, ~0, ~0 }; |
f277ce36 | 379 | int same_uuid(int a[4], int b[4], int swapuuid) |
64c4757e | 380 | { |
36ba7d48 DW |
381 | if (memcmp(a, uuid_match_any, sizeof(int[4])) == 0 || |
382 | memcmp(b, uuid_match_any, sizeof(int[4])) == 0) | |
383 | return 1; | |
384 | ||
f277ce36 NB |
385 | if (swapuuid) { |
386 | /* parse uuids are hostendian. | |
387 | * uuid's from some superblocks are big-ending | |
aba69144 | 388 | * if there is a difference, we need to swap.. |
f277ce36 NB |
389 | */ |
390 | unsigned char *ac = (unsigned char *)a; | |
391 | unsigned char *bc = (unsigned char *)b; | |
392 | int i; | |
393 | for (i=0; i<16; i+= 4) { | |
394 | if (ac[i+0] != bc[i+3] || | |
395 | ac[i+1] != bc[i+2] || | |
396 | ac[i+2] != bc[i+1] || | |
397 | ac[i+3] != bc[i+0]) | |
398 | return 0; | |
399 | } | |
400 | return 1; | |
401 | } else { | |
402 | if (a[0]==b[0] && | |
403 | a[1]==b[1] && | |
404 | a[2]==b[2] && | |
405 | a[3]==b[3]) | |
406 | return 1; | |
407 | return 0; | |
408 | } | |
64c4757e | 409 | } |
350f29f9 NB |
410 | void copy_uuid(void *a, int b[4], int swapuuid) |
411 | { | |
412 | if (swapuuid) { | |
413 | /* parse uuids are hostendian. | |
414 | * uuid's from some superblocks are big-ending | |
415 | * if there is a difference, we need to swap.. | |
416 | */ | |
417 | unsigned char *ac = (unsigned char *)a; | |
418 | unsigned char *bc = (unsigned char *)b; | |
419 | int i; | |
420 | for (i=0; i<16; i+= 4) { | |
421 | ac[i+0] = bc[i+3]; | |
422 | ac[i+1] = bc[i+2]; | |
423 | ac[i+2] = bc[i+1]; | |
424 | ac[i+3] = bc[i+0]; | |
425 | } | |
426 | } else | |
427 | memcpy(a, b, 16); | |
428 | } | |
64c4757e | 429 | |
aae5a112 | 430 | char *__fname_from_uuid(int id[4], int swap, char *buf, char sep) |
d7288ddc | 431 | { |
9968e376 | 432 | int i, j; |
d7288ddc N |
433 | char uuid[16]; |
434 | char *c = buf; | |
435 | strcpy(c, "UUID-"); | |
436 | c += strlen(c); | |
aae5a112 | 437 | copy_uuid(uuid, id, swap); |
9968e376 | 438 | for (i = 0; i < 4; i++) { |
9968e376 | 439 | if (i) |
ff54de6e | 440 | *c++ = sep; |
9968e376 DW |
441 | for (j = 3; j >= 0; j--) { |
442 | sprintf(c,"%02x", (unsigned char) uuid[j+4*i]); | |
443 | c+= 2; | |
444 | } | |
d7288ddc N |
445 | } |
446 | return buf; | |
aae5a112 DW |
447 | |
448 | } | |
449 | ||
450 | char *fname_from_uuid(struct supertype *st, struct mdinfo *info, char *buf, char sep) | |
451 | { | |
86983cce N |
452 | // dirty hack to work around an issue with super1 superblocks... |
453 | // super1 superblocks need swapuuid set in order for assembly to | |
454 | // work, but can't have it set if we want this printout to match | |
455 | // all the other uuid printouts in super1.c, so we force swapuuid | |
456 | // to 1 to make our printout match the rest of super1 | |
457 | return __fname_from_uuid(info->uuid, (st->ss == &super1) ? 1 : st->ss->swapuuid, buf, sep); | |
d7288ddc N |
458 | } |
459 | ||
435d4ebb | 460 | #ifndef MDASSEMBLE |
682c7051 NB |
461 | int check_ext2(int fd, char *name) |
462 | { | |
463 | /* | |
464 | * Check for an ext2fs file system. | |
465 | * Superblock is always 1K at 1K offset | |
466 | * | |
467 | * s_magic is le16 at 56 == 0xEF53 | |
468 | * report mtime - le32 at 44 | |
469 | * blocks - le32 at 4 | |
470 | * logblksize - le32 at 24 | |
471 | */ | |
472 | unsigned char sb[1024]; | |
473 | time_t mtime; | |
474 | int size, bsize; | |
475 | if (lseek(fd, 1024,0)!= 1024) | |
476 | return 0; | |
477 | if (read(fd, sb, 1024)!= 1024) | |
478 | return 0; | |
479 | if (sb[56] != 0x53 || sb[57] != 0xef) | |
480 | return 0; | |
481 | ||
482 | mtime = sb[44]|(sb[45]|(sb[46]|sb[47]<<8)<<8)<<8; | |
483 | bsize = sb[24]|(sb[25]|(sb[26]|sb[27]<<8)<<8)<<8; | |
484 | size = sb[4]|(sb[5]|(sb[6]|sb[7]<<8)<<8)<<8; | |
485 | fprintf(stderr, Name ": %s appears to contain an ext2fs file system\n", | |
486 | name); | |
487 | fprintf(stderr," size=%dK mtime=%s", | |
488 | size*(1<<bsize), ctime(&mtime)); | |
489 | return 1; | |
490 | } | |
491 | ||
492 | int check_reiser(int fd, char *name) | |
493 | { | |
494 | /* | |
495 | * superblock is at 64K | |
496 | * size is 1024; | |
497 | * Magic string "ReIsErFs" or "ReIsEr2Fs" at 52 | |
498 | * | |
499 | */ | |
500 | unsigned char sb[1024]; | |
881990a2 | 501 | unsigned long size; |
682c7051 NB |
502 | if (lseek(fd, 64*1024, 0) != 64*1024) |
503 | return 0; | |
504 | if (read(fd, sb, 1024) != 1024) | |
505 | return 0; | |
a46f4061 NB |
506 | if (strncmp((char*)sb+52, "ReIsErFs",8)!=0 && |
507 | strncmp((char*)sb+52, "ReIsEr2Fs",9)!=0) | |
682c7051 NB |
508 | return 0; |
509 | fprintf(stderr, Name ": %s appears to contain a reiserfs file system\n",name); | |
510 | size = sb[0]|(sb[1]|(sb[2]|sb[3]<<8)<<8)<<8; | |
881990a2 | 511 | fprintf(stderr, " size = %luK\n", size*4); |
aba69144 | 512 | |
682c7051 NB |
513 | return 1; |
514 | } | |
515 | ||
516 | int check_raid(int fd, char *name) | |
517 | { | |
4b1ac34b | 518 | struct mdinfo info; |
682c7051 | 519 | time_t crtime; |
d078d77c | 520 | char *level; |
82d9eba6 | 521 | struct supertype *st = guess_super(fd); |
f9ce90ba | 522 | |
82d9eba6 | 523 | if (!st) return 0; |
3da92f27 | 524 | st->ss->load_super(st, fd, name); |
82d9eba6 NB |
525 | /* Looks like a raid array .. */ |
526 | fprintf(stderr, Name ": %s appears to be part of a raid array:\n", | |
527 | name); | |
a5d85af7 | 528 | st->ss->getinfo_super(st, &info, NULL); |
3da92f27 | 529 | st->ss->free_super(st); |
82d9eba6 | 530 | crtime = info.array.ctime; |
d078d77c NB |
531 | level = map_num(pers, info.array.level); |
532 | if (!level) level = "-unknown-"; | |
533 | fprintf(stderr, " level=%s devices=%d ctime=%s", | |
534 | level, info.array.raid_disks, ctime(&crtime)); | |
82d9eba6 | 535 | return 1; |
682c7051 NB |
536 | } |
537 | ||
682c7051 NB |
538 | int ask(char *mesg) |
539 | { | |
540 | char *add = ""; | |
541 | int i; | |
542 | for (i=0; i<5; i++) { | |
543 | char buf[100]; | |
544 | fprintf(stderr, "%s%s", mesg, add); | |
545 | fflush(stderr); | |
546 | if (fgets(buf, 100, stdin)==NULL) | |
547 | return 0; | |
548 | if (buf[0]=='y' || buf[0]=='Y') | |
549 | return 1; | |
550 | if (buf[0]=='n' || buf[0]=='N') | |
551 | return 0; | |
552 | add = "(y/n) "; | |
553 | } | |
554 | fprintf(stderr, Name ": assuming 'no'\n"); | |
555 | return 0; | |
556 | } | |
435d4ebb | 557 | #endif /* MDASSEMBLE */ |
682c7051 NB |
558 | |
559 | char *map_num(mapping_t *map, int num) | |
560 | { | |
561 | while (map->name) { | |
562 | if (map->num == num) | |
563 | return map->name; | |
564 | map++; | |
565 | } | |
566 | return NULL; | |
567 | } | |
568 | ||
569 | int map_name(mapping_t *map, char *name) | |
570 | { | |
571 | while (map->name) { | |
572 | if (strcmp(map->name, name)==0) | |
573 | return map->num; | |
574 | map++; | |
575 | } | |
98c6faba | 576 | return UnSet; |
682c7051 | 577 | } |
82b27616 | 578 | |
e5329c37 | 579 | |
8d80900b | 580 | int is_standard(char *dev, int *nump) |
e5329c37 NB |
581 | { |
582 | /* tests if dev is a "standard" md dev name. | |
583 | * i.e if the last component is "/dNN" or "/mdNN", | |
aba69144 | 584 | * where NN is a string of digits |
598f0d58 NB |
585 | * Returns 1 if a partitionable standard, |
586 | * -1 if non-partitonable, | |
587 | * 0 if not a standard name. | |
e5329c37 | 588 | */ |
8d80900b NB |
589 | char *d = strrchr(dev, '/'); |
590 | int type=0; | |
591 | int num; | |
592 | if (!d) | |
e5329c37 | 593 | return 0; |
8d80900b NB |
594 | if (strncmp(d, "/d",2)==0) |
595 | d += 2, type=1; /* /dev/md/dN{pM} */ | |
596 | else if (strncmp(d, "/md_d", 5)==0) | |
2b4ca8f0 | 597 | d += 5, type=1; /* /dev/md_dN{pM} */ |
8d80900b NB |
598 | else if (strncmp(d, "/md", 3)==0) |
599 | d += 3, type=-1; /* /dev/mdN */ | |
600 | else if (d-dev > 3 && strncmp(d-2, "md/", 3)==0) | |
5a6d1148 | 601 | d += 1, type=-1; /* /dev/md/N */ |
e5329c37 NB |
602 | else |
603 | return 0; | |
8d80900b | 604 | if (!*d) |
e5329c37 | 605 | return 0; |
8d80900b NB |
606 | num = atoi(d); |
607 | while (isdigit(*d)) | |
608 | d++; | |
609 | if (*d) | |
e5329c37 | 610 | return 0; |
8d80900b NB |
611 | if (nump) *nump = num; |
612 | ||
613 | return type; | |
e5329c37 NB |
614 | } |
615 | ||
616 | ||
82b27616 NB |
617 | /* |
618 | * convert a major/minor pair for a block device into a name in /dev, if possible. | |
619 | * On the first call, walk /dev collecting name. | |
620 | * Put them in a simple linked listfor now. | |
621 | */ | |
622 | struct devmap { | |
623 | int major, minor; | |
624 | char *name; | |
625 | struct devmap *next; | |
626 | } *devlist = NULL; | |
627 | int devlist_ready = 0; | |
628 | ||
82b27616 NB |
629 | int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s) |
630 | { | |
bed256c2 | 631 | struct stat st; |
bf68e9d9 | 632 | |
bed256c2 | 633 | if (S_ISLNK(stb->st_mode)) { |
bf68e9d9 DW |
634 | if (stat(name, &st) != 0) |
635 | return 0; | |
bed256c2 | 636 | stb = &st; |
82b27616 | 637 | } |
bed256c2 NB |
638 | |
639 | if ((stb->st_mode&S_IFMT)== S_IFBLK) { | |
640 | char *n = strdup(name); | |
641 | struct devmap *dm = malloc(sizeof(*dm)); | |
642 | if (strncmp(n, "/dev/./", 7)==0) | |
643 | strcpy(n+4, name+6); | |
644 | if (dm) { | |
645 | dm->major = major(stb->st_rdev); | |
646 | dm->minor = minor(stb->st_rdev); | |
647 | dm->name = n; | |
648 | dm->next = devlist; | |
649 | devlist = dm; | |
650 | } | |
651 | } | |
652 | return 0; | |
82b27616 NB |
653 | } |
654 | ||
45e878bb NB |
655 | #ifndef HAVE_NFTW |
656 | #ifdef HAVE_FTW | |
657 | int add_dev_1(const char *name, const struct stat *stb, int flag) | |
658 | { | |
659 | return add_dev(name, stb, flag, NULL); | |
660 | } | |
661 | int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) | |
662 | { | |
663 | return ftw(path, add_dev_1, nopenfd); | |
664 | } | |
665 | #else | |
45e878bb NB |
666 | int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags) |
667 | { | |
668 | return 0; | |
669 | } | |
670 | #endif /* HAVE_FTW */ | |
671 | #endif /* HAVE_NFTW */ | |
672 | ||
dd0781e5 NB |
673 | /* |
674 | * Find a block device with the right major/minor number. | |
b79713f8 | 675 | * If we find multiple names, choose the shortest. |
70ef16db | 676 | * If we find a name in /dev/md/, we prefer that. |
b79713f8 | 677 | * This applies only to names for MD devices. |
dd0781e5 | 678 | */ |
16c6fa80 | 679 | char *map_dev(int major, int minor, int create) |
82b27616 | 680 | { |
dd0781e5 | 681 | struct devmap *p; |
70ef16db | 682 | char *regular = NULL, *preferred=NULL; |
e7bb5d23 | 683 | int did_check = 0; |
eed35d66 | 684 | |
e81cdd9f | 685 | if (major == 0 && minor == 0) |
eed35d66 | 686 | return NULL; |
e81cdd9f | 687 | |
e7bb5d23 | 688 | retry: |
dd0781e5 | 689 | if (!devlist_ready) { |
0a416ec3 NB |
690 | char *dev = "/dev"; |
691 | struct stat stb; | |
eed35d66 NB |
692 | while(devlist) { |
693 | struct devmap *d = devlist; | |
694 | devlist = d->next; | |
695 | free(d->name); | |
696 | free(d); | |
697 | } | |
0a416ec3 NB |
698 | if (lstat(dev, &stb)==0 && |
699 | S_ISLNK(stb.st_mode)) | |
700 | dev = "/dev/."; | |
701 | nftw(dev, add_dev, 10, FTW_PHYS); | |
dd0781e5 | 702 | devlist_ready=1; |
e7bb5d23 | 703 | did_check = 1; |
dd0781e5 | 704 | } |
82b27616 | 705 | |
dd0781e5 NB |
706 | for (p=devlist; p; p=p->next) |
707 | if (p->major == major && | |
708 | p->minor == minor) { | |
70ef16db N |
709 | if (strncmp(p->name, "/dev/md/",8) == 0) { |
710 | if (preferred == NULL || | |
711 | strlen(p->name) < strlen(preferred)) | |
712 | preferred = p->name; | |
b79713f8 | 713 | } else { |
70ef16db N |
714 | if (regular == NULL || |
715 | strlen(p->name) < strlen(regular)) | |
716 | regular = p->name; | |
b79713f8 | 717 | } |
dd0781e5 | 718 | } |
70ef16db | 719 | if (!regular && !preferred && !did_check) { |
e7bb5d23 NB |
720 | devlist_ready = 0; |
721 | goto retry; | |
722 | } | |
70ef16db | 723 | if (create && !regular && !preferred) { |
16c6fa80 | 724 | static char buf[30]; |
382245c3 | 725 | snprintf(buf, sizeof(buf), "%d:%d", major, minor); |
70ef16db | 726 | regular = buf; |
16c6fa80 NB |
727 | } |
728 | ||
70ef16db | 729 | return preferred ? preferred : regular; |
82b27616 NB |
730 | } |
731 | ||
4b1ac34b | 732 | unsigned long calc_csum(void *super, int bytes) |
82b27616 | 733 | { |
56eb10c0 | 734 | unsigned long long newcsum = 0; |
82b27616 | 735 | int i; |
4b1ac34b NB |
736 | unsigned int csum; |
737 | unsigned int *superc = (unsigned int*) super; | |
82b27616 | 738 | |
4b1ac34b | 739 | for(i=0; i<bytes/4; i++) |
82b27616 NB |
740 | newcsum+= superc[i]; |
741 | csum = (newcsum& 0xffffffff) + (newcsum>>32); | |
570c0542 | 742 | #ifdef __alpha__ |
aba69144 | 743 | /* The in-kernel checksum calculation is always 16bit on |
570c0542 NB |
744 | * the alpha, though it is 32 bit on i386... |
745 | * I wonder what it is elsewhere... (it uses and API in | |
746 | * a way that it shouldn't). | |
747 | */ | |
748 | csum = (csum & 0xffff) + (csum >> 16); | |
749 | csum = (csum & 0xffff) + (csum >> 16); | |
750 | #endif | |
82b27616 NB |
751 | return csum; |
752 | } | |
cd29a5c8 | 753 | |
435d4ebb | 754 | #ifndef MDASSEMBLE |
56eb10c0 | 755 | char *human_size(long long bytes) |
cd29a5c8 NB |
756 | { |
757 | static char buf[30]; | |
d5d3721e NB |
758 | |
759 | /* We convert bytes to either centi-M{ega,ibi}bytes or | |
760 | * centi-G{igi,ibi}bytes, with appropriate rounding, | |
761 | * and then print 1/100th of those as a decimal. | |
762 | * We allow upto 2048Megabytes before converting to | |
763 | * gigabytes, as that shows more precision and isn't | |
764 | * too large a number. | |
765 | * Terrabytes are not yet handled. | |
766 | */ | |
cd29a5c8 | 767 | |
56eb10c0 | 768 | if (bytes < 5000*1024) |
cd29a5c8 | 769 | buf[0]=0; |
d5d3721e NB |
770 | else if (bytes < 2*1024LL*1024LL*1024LL) { |
771 | long cMiB = (bytes / ( (1LL<<20) / 200LL ) +1) /2; | |
772 | long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; | |
8f23b0b3 | 773 | snprintf(buf, sizeof(buf), " (%ld.%02ld MiB %ld.%02ld MB)", |
d5d3721e NB |
774 | cMiB/100 , cMiB % 100, |
775 | cMB/100, cMB % 100); | |
776 | } else { | |
777 | long cGiB = (bytes / ( (1LL<<30) / 200LL ) +1) /2; | |
778 | long cGB = (bytes / (1000000000LL/200LL ) +1) /2; | |
8f23b0b3 | 779 | snprintf(buf, sizeof(buf), " (%ld.%02ld GiB %ld.%02ld GB)", |
d5d3721e NB |
780 | cGiB/100 , cGiB % 100, |
781 | cGB/100, cGB % 100); | |
782 | } | |
cd29a5c8 NB |
783 | return buf; |
784 | } | |
e0d19036 NB |
785 | |
786 | char *human_size_brief(long long bytes) | |
787 | { | |
788 | static char buf[30]; | |
e0d19036 NB |
789 | |
790 | if (bytes < 5000*1024) | |
8f23b0b3 | 791 | snprintf(buf, sizeof(buf), "%ld.%02ldKiB", |
bd526cee | 792 | (long)(bytes>>10), (long)(((bytes&1023)*100+512)/1024) |
e0d19036 NB |
793 | ); |
794 | else if (bytes < 2*1024LL*1024LL*1024LL) | |
8f23b0b3 | 795 | snprintf(buf, sizeof(buf), "%ld.%02ldMiB", |
e0d19036 | 796 | (long)(bytes>>20), |
bd526cee | 797 | (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100) |
e0d19036 NB |
798 | ); |
799 | else | |
8f23b0b3 | 800 | snprintf(buf, sizeof(buf), "%ld.%02ldGiB", |
e0d19036 | 801 | (long)(bytes>>30), |
bd526cee | 802 | (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100) |
e0d19036 NB |
803 | ); |
804 | return buf; | |
805 | } | |
e4965ef8 N |
806 | |
807 | void print_r10_layout(int layout) | |
808 | { | |
809 | int near = layout & 255; | |
810 | int far = (layout >> 8) & 255; | |
811 | int offset = (layout&0x10000); | |
812 | char *sep = ""; | |
813 | ||
814 | if (near != 1) { | |
815 | printf("%s near=%d", sep, near); | |
816 | sep = ","; | |
817 | } | |
818 | if (far != 1) | |
819 | printf("%s %s=%d", sep, offset?"offset":"far", far); | |
820 | if (near*far == 1) | |
821 | printf("NO REDUNDANCY"); | |
822 | } | |
435d4ebb | 823 | #endif |
e0d19036 | 824 | |
5f8097be NB |
825 | unsigned long long calc_array_size(int level, int raid_disks, int layout, |
826 | int chunksize, unsigned long long devsize) | |
827 | { | |
828 | int data_disks = 0; | |
829 | switch (level) { | |
830 | case 0: data_disks = raid_disks; break; | |
831 | case 1: data_disks = 1; break; | |
832 | case 4: | |
833 | case 5: data_disks = raid_disks - 1; break; | |
834 | case 6: data_disks = raid_disks - 2; break; | |
835 | case 10: data_disks = raid_disks / (layout & 255) / ((layout>>8)&255); | |
836 | break; | |
837 | } | |
838 | devsize &= ~(unsigned long long)((chunksize>>9)-1); | |
839 | return data_disks * devsize; | |
840 | } | |
841 | ||
dd0781e5 | 842 | int get_mdp_major(void) |
98c6faba | 843 | { |
dd0781e5 NB |
844 | static int mdp_major = -1; |
845 | FILE *fl; | |
98c6faba NB |
846 | char *w; |
847 | int have_block = 0; | |
848 | int have_devices = 0; | |
849 | int last_num = -1; | |
dd0781e5 NB |
850 | |
851 | if (mdp_major != -1) | |
852 | return mdp_major; | |
853 | fl = fopen("/proc/devices", "r"); | |
98c6faba | 854 | if (!fl) |
dd0781e5 | 855 | return -1; |
98c6faba NB |
856 | while ((w = conf_word(fl, 1))) { |
857 | if (have_block && strcmp(w, "devices:")==0) | |
858 | have_devices = 1; | |
859 | have_block = (strcmp(w, "Block")==0); | |
860 | if (isdigit(w[0])) | |
861 | last_num = atoi(w); | |
862 | if (have_devices && strcmp(w, "mdp")==0) | |
863 | mdp_major = last_num; | |
864 | free(w); | |
865 | } | |
866 | fclose(fl); | |
dd0781e5 | 867 | return mdp_major; |
98c6faba NB |
868 | } |
869 | ||
0e600426 | 870 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) |
e0d19036 NB |
871 | char *get_md_name(int dev) |
872 | { | |
873 | /* find /dev/md%d or /dev/md/%d or make a device /dev/.tmp.md%d */ | |
98c6faba | 874 | /* if dev < 0, want /dev/md/d%d or find mdp in /proc/devices ... */ |
e0d19036 NB |
875 | static char devname[50]; |
876 | struct stat stb; | |
98c6faba | 877 | dev_t rdev; |
dd0781e5 | 878 | char *dn; |
98c6faba NB |
879 | |
880 | if (dev < 0) { | |
dd0781e5 NB |
881 | int mdp = get_mdp_major(); |
882 | if (mdp < 0) return NULL; | |
0df46c2a | 883 | rdev = makedev(mdp, (-1-dev)<<6); |
8f23b0b3 | 884 | snprintf(devname, sizeof(devname), "/dev/md/d%d", -1-dev); |
98c6faba NB |
885 | if (stat(devname, &stb) == 0 |
886 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
887 | && (stb.st_rdev == rdev)) | |
888 | return devname; | |
889 | } else { | |
0df46c2a | 890 | rdev = makedev(MD_MAJOR, dev); |
8f23b0b3 | 891 | snprintf(devname, sizeof(devname), "/dev/md%d", dev); |
98c6faba NB |
892 | if (stat(devname, &stb) == 0 |
893 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
894 | && (stb.st_rdev == rdev)) | |
895 | return devname; | |
896 | ||
8f23b0b3 | 897 | snprintf(devname, sizeof(devname), "/dev/md/%d", dev); |
98c6faba NB |
898 | if (stat(devname, &stb) == 0 |
899 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
900 | && (stb.st_rdev == rdev)) | |
901 | return devname; | |
902 | } | |
16c6fa80 | 903 | dn = map_dev(major(rdev), minor(rdev), 0); |
dd0781e5 NB |
904 | if (dn) |
905 | return dn; | |
8f23b0b3 | 906 | snprintf(devname, sizeof(devname), "/dev/.tmp.md%d", dev); |
e0d19036 | 907 | if (mknod(devname, S_IFBLK | 0600, rdev) == -1) |
dd0781e5 NB |
908 | if (errno != EEXIST) |
909 | return NULL; | |
e0d19036 NB |
910 | |
911 | if (stat(devname, &stb) == 0 | |
912 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
913 | && (stb.st_rdev == rdev)) | |
914 | return devname; | |
915 | unlink(devname); | |
916 | return NULL; | |
917 | } | |
918 | ||
919 | void put_md_name(char *name) | |
920 | { | |
921 | if (strncmp(name, "/dev/.tmp.md", 12)==0) | |
922 | unlink(name); | |
923 | } | |
ea24acd0 | 924 | |
ea24acd0 NB |
925 | int find_free_devnum(int use_partitions) |
926 | { | |
927 | int devnum; | |
928 | for (devnum = 127; devnum != 128; | |
a56fb7ec | 929 | devnum = devnum ? devnum-1 : (1<<20)-1) { |
ea24acd0 NB |
930 | char *dn; |
931 | int _devnum; | |
932 | ||
933 | _devnum = use_partitions ? (-1-devnum) : devnum; | |
934 | if (mddev_busy(_devnum)) | |
935 | continue; | |
936 | /* make sure it is new to /dev too, at least as a | |
937 | * non-standard */ | |
938 | dn = map_dev(dev2major(_devnum), dev2minor(_devnum), 0); | |
939 | if (dn && ! is_standard(dn, NULL)) | |
940 | continue; | |
941 | break; | |
942 | } | |
943 | if (devnum == 128) | |
944 | return NoMdDev; | |
945 | return use_partitions ? (-1-devnum) : devnum; | |
946 | } | |
435d4ebb | 947 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ |
f9ce90ba | 948 | |
8b0dabea NB |
949 | int dev_open(char *dev, int flags) |
950 | { | |
951 | /* like 'open', but if 'dev' matches %d:%d, create a temp | |
952 | * block device and open that | |
953 | */ | |
954 | char *e; | |
955 | int fd = -1; | |
956 | char devname[32]; | |
e81cdd9f | 957 | int major; |
8b0dabea | 958 | int minor; |
e81cdd9f NB |
959 | |
960 | if (!dev) return -1; | |
6df6a774 | 961 | flags |= O_DIRECT; |
e81cdd9f NB |
962 | |
963 | major = strtoul(dev, &e, 0); | |
8b0dabea NB |
964 | if (e > dev && *e == ':' && e[1] && |
965 | (minor = strtoul(e+1, &e, 0)) >= 0 && | |
966 | *e == 0) { | |
6df6a774 N |
967 | char *path = map_dev(major, minor, 0); |
968 | if (path) | |
969 | fd = open(path, flags); | |
970 | if (fd < 0) { | |
971 | snprintf(devname, sizeof(devname), "/dev/.tmp.md.%d:%d:%d", | |
972 | (int)getpid(), major, minor); | |
973 | if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { | |
974 | fd = open(devname, flags); | |
975 | unlink(devname); | |
976 | } | |
977 | } | |
978 | if (fd < 0) { | |
979 | snprintf(devname, sizeof(devname), "/tmp/.tmp.md.%d:%d:%d", | |
980 | (int)getpid(), major, minor); | |
981 | if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { | |
982 | fd = open(devname, flags); | |
983 | unlink(devname); | |
984 | } | |
8b0dabea NB |
985 | } |
986 | } else | |
6df6a774 | 987 | fd = open(dev, flags); |
8b0dabea NB |
988 | return fd; |
989 | } | |
f9ce90ba | 990 | |
e8a70c89 N |
991 | int open_dev(int devnum) |
992 | { | |
993 | char buf[20]; | |
994 | ||
995 | sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum)); | |
996 | return dev_open(buf, O_RDWR); | |
997 | } | |
998 | ||
a931db9e NB |
999 | int open_dev_excl(int devnum) |
1000 | { | |
1001 | char buf[20]; | |
1002 | int i; | |
1003 | ||
1004 | sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum)); | |
1005 | for (i=0 ; i<25 ; i++) { | |
1006 | int fd = dev_open(buf, O_RDWR|O_EXCL); | |
1007 | if (fd >= 0) | |
1008 | return fd; | |
1009 | if (errno != EBUSY) | |
1010 | return fd; | |
1011 | usleep(200000); | |
1012 | } | |
1013 | return -1; | |
1014 | } | |
1015 | ||
9008ed1c N |
1016 | int same_dev(char *one, char *two) |
1017 | { | |
1018 | struct stat st1, st2; | |
1019 | if (stat(one, &st1) != 0) | |
1020 | return 0; | |
1021 | if (stat(two, &st2) != 0) | |
1022 | return 0; | |
1023 | if ((st1.st_mode & S_IFMT) != S_IFBLK) | |
1024 | return 0; | |
1025 | if ((st2.st_mode & S_IFMT) != S_IFBLK) | |
1026 | return 0; | |
1027 | return st1.st_rdev == st2.st_rdev; | |
1028 | } | |
1029 | ||
a7c6e3fb | 1030 | void wait_for(char *dev, int fd) |
a714580e N |
1031 | { |
1032 | int i; | |
a7c6e3fb N |
1033 | struct stat stb_want; |
1034 | ||
1035 | if (fstat(fd, &stb_want) != 0 || | |
1036 | (stb_want.st_mode & S_IFMT) != S_IFBLK) | |
1037 | return; | |
a714580e N |
1038 | |
1039 | for (i=0 ; i<25 ; i++) { | |
1040 | struct stat stb; | |
a7c6e3fb N |
1041 | if (stat(dev, &stb) == 0 && |
1042 | (stb.st_mode & S_IFMT) == S_IFBLK && | |
1043 | (stb.st_rdev == stb_want.st_rdev)) | |
a714580e N |
1044 | return; |
1045 | usleep(200000); | |
1046 | } | |
436305c6 DW |
1047 | if (i == 25) |
1048 | dprintf("%s: timeout waiting for %s\n", __func__, dev); | |
a714580e N |
1049 | } |
1050 | ||
0f22b998 N |
1051 | struct superswitch *superlist[] = |
1052 | { | |
1053 | &super0, &super1, | |
1054 | &super_ddf, &super_imsm, | |
0592faeb | 1055 | &mbr, &gpt, |
0f22b998 | 1056 | NULL }; |
f9ce90ba | 1057 | |
ea24acd0 | 1058 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) |
f7dd881f | 1059 | |
4725bc31 | 1060 | struct supertype *super_by_fd(int fd, char **subarrayp) |
f9ce90ba | 1061 | { |
1686dc25 NB |
1062 | mdu_array_info_t array; |
1063 | int vers; | |
1064 | int minor; | |
1065 | struct supertype *st = NULL; | |
7e0f6979 | 1066 | struct mdinfo *sra; |
142cb9e1 | 1067 | char *verstr; |
1686dc25 NB |
1068 | char version[20]; |
1069 | int i; | |
f7e7067b | 1070 | char *subarray = NULL; |
5f7e44b2 | 1071 | int container = NoMdDev; |
1686dc25 NB |
1072 | |
1073 | sra = sysfs_read(fd, 0, GET_VERSION); | |
1074 | ||
1075 | if (sra) { | |
7e0f6979 NB |
1076 | vers = sra->array.major_version; |
1077 | minor = sra->array.minor_version; | |
142cb9e1 | 1078 | verstr = sra->text_version; |
1686dc25 NB |
1079 | } else { |
1080 | if (ioctl(fd, GET_ARRAY_INFO, &array)) | |
1081 | array.major_version = array.minor_version = 0; | |
1082 | vers = array.major_version; | |
1083 | minor = array.minor_version; | |
142cb9e1 | 1084 | verstr = ""; |
6fbba4c9 | 1085 | } |
82d9eba6 | 1086 | |
1686dc25 NB |
1087 | if (vers != -1) { |
1088 | sprintf(version, "%d.%d", vers, minor); | |
1089 | verstr = version; | |
6fbba4c9 | 1090 | } |
3c558363 | 1091 | if (minor == -2 && is_subarray(verstr)) { |
f7e7067b | 1092 | char *dev = verstr+1; |
5f7e44b2 | 1093 | |
f7e7067b | 1094 | subarray = strchr(dev, '/'); |
f7e7067b NB |
1095 | if (subarray) |
1096 | *subarray++ = '\0'; | |
f7e7067b | 1097 | subarray = strdup(subarray); |
5f7e44b2 | 1098 | container = devname2devnum(dev); |
f7e7067b NB |
1099 | if (sra) |
1100 | sysfs_free(sra); | |
5f7e44b2 | 1101 | sra = sysfs_read(-1, container, GET_VERSION); |
603f24a0 N |
1102 | if (sra && sra->text_version[0]) |
1103 | verstr = sra->text_version; | |
1104 | else | |
1105 | verstr = "-no-metadata-"; | |
f7e7067b NB |
1106 | } |
1107 | ||
1108 | for (i = 0; st == NULL && superlist[i] ; i++) | |
1109 | st = superlist[i]->match_metadata_desc(verstr); | |
1686dc25 NB |
1110 | |
1111 | if (sra) | |
1112 | sysfs_free(sra); | |
f7e7067b | 1113 | if (st) { |
3b0896f8 | 1114 | st->sb = NULL; |
1f49fb3a N |
1115 | if (subarrayp) |
1116 | *subarrayp = subarray; | |
5f7e44b2 DW |
1117 | st->container_dev = container; |
1118 | st->devnum = fd2devnum(fd); | |
4725bc31 N |
1119 | } else |
1120 | free(subarray); | |
5f7e44b2 | 1121 | |
82d9eba6 | 1122 | return st; |
f9ce90ba | 1123 | } |
ea24acd0 NB |
1124 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ |
1125 | ||
52d5d101 AC |
1126 | int dev_size_from_id(unsigned int id, unsigned long long *size) |
1127 | { | |
1128 | char buf[20]; | |
1129 | int fd; | |
1130 | ||
1131 | sprintf(buf, "%d:%d", major(id), minor(id)); | |
1132 | fd = dev_open(buf, O_RDONLY); | |
1133 | if (fd < 0) | |
1134 | return 0; | |
1135 | if (get_dev_size(fd, NULL, size)) { | |
1136 | close(fd); | |
1137 | return 1; | |
1138 | } | |
1139 | close(fd); | |
1140 | return 0; | |
1141 | } | |
f9ce90ba | 1142 | |
159c3a1a | 1143 | struct supertype *dup_super(struct supertype *orig) |
3da92f27 | 1144 | { |
159c3a1a | 1145 | struct supertype *st; |
1686dc25 | 1146 | |
d2ca6449 NB |
1147 | if (!orig) |
1148 | return orig; | |
159c3a1a | 1149 | st = malloc(sizeof(*st)); |
3da92f27 NB |
1150 | if (!st) |
1151 | return st; | |
ef609477 | 1152 | memset(st, 0, sizeof(*st)); |
159c3a1a NB |
1153 | st->ss = orig->ss; |
1154 | st->max_devs = orig->max_devs; | |
1155 | st->minor_version = orig->minor_version; | |
1156 | st->sb = NULL; | |
1157 | st->info = NULL; | |
1158 | return st; | |
3da92f27 NB |
1159 | } |
1160 | ||
54887ad8 | 1161 | struct supertype *guess_super_type(int fd, enum guess_types guess_type) |
f9ce90ba NB |
1162 | { |
1163 | /* try each load_super to find the best match, | |
1164 | * and return the best superswitch | |
1165 | */ | |
82d9eba6 NB |
1166 | struct superswitch *ss; |
1167 | struct supertype *st; | |
f21e18ca | 1168 | time_t besttime = 0; |
570c0542 | 1169 | int bestsuper = -1; |
f9ce90ba NB |
1170 | int i; |
1171 | ||
82d9eba6 | 1172 | st = malloc(sizeof(*st)); |
d1d599ea N |
1173 | memset(st, 0, sizeof(*st)); |
1174 | st->container_dev = NoMdDev; | |
1175 | ||
f9ce90ba NB |
1176 | for (i=0 ; superlist[i]; i++) { |
1177 | int rv; | |
1178 | ss = superlist[i]; | |
54887ad8 N |
1179 | if (guess_type == guess_array && ss->add_to_super == NULL) |
1180 | continue; | |
1181 | if (guess_type == guess_partitions && ss->add_to_super != NULL) | |
1182 | continue; | |
ef609477 | 1183 | memset(st, 0, sizeof(*st)); |
3da92f27 | 1184 | rv = ss->load_super(st, fd, NULL); |
570c0542 NB |
1185 | if (rv == 0) { |
1186 | struct mdinfo info; | |
a5d85af7 | 1187 | st->ss->getinfo_super(st, &info, NULL); |
570c0542 NB |
1188 | if (bestsuper == -1 || |
1189 | besttime < info.array.ctime) { | |
1190 | bestsuper = i; | |
1191 | besttime = info.array.ctime; | |
570c0542 | 1192 | } |
3da92f27 | 1193 | ss->free_super(st); |
570c0542 NB |
1194 | } |
1195 | } | |
1196 | if (bestsuper != -1) { | |
1197 | int rv; | |
ef609477 | 1198 | memset(st, 0, sizeof(*st)); |
3da92f27 | 1199 | rv = superlist[bestsuper]->load_super(st, fd, NULL); |
f9ce90ba | 1200 | if (rv == 0) { |
5e747af2 | 1201 | superlist[bestsuper]->free_super(st); |
82d9eba6 | 1202 | return st; |
f9ce90ba NB |
1203 | } |
1204 | } | |
570c0542 | 1205 | free(st); |
f9ce90ba NB |
1206 | return NULL; |
1207 | } | |
fe6729fa | 1208 | |
beae1dfe NB |
1209 | /* Return size of device in bytes */ |
1210 | int get_dev_size(int fd, char *dname, unsigned long long *sizep) | |
1211 | { | |
1212 | unsigned long long ldsize; | |
c2c9bb6f NB |
1213 | struct stat st; |
1214 | ||
1215 | if (fstat(fd, &st) != -1 && S_ISREG(st.st_mode)) | |
1216 | ldsize = (unsigned long long)st.st_size; | |
1217 | else | |
beae1dfe NB |
1218 | #ifdef BLKGETSIZE64 |
1219 | if (ioctl(fd, BLKGETSIZE64, &ldsize) != 0) | |
1220 | #endif | |
1221 | { | |
1222 | unsigned long dsize; | |
1223 | if (ioctl(fd, BLKGETSIZE, &dsize) == 0) { | |
1224 | ldsize = dsize; | |
1225 | ldsize <<= 9; | |
1226 | } else { | |
1227 | if (dname) | |
1228 | fprintf(stderr, Name ": Cannot get size of %s: %s\b", | |
1229 | dname, strerror(errno)); | |
1230 | return 0; | |
1231 | } | |
1232 | } | |
1233 | *sizep = ldsize; | |
1234 | return 1; | |
1235 | } | |
8fac0577 | 1236 | |
3a371610 N |
1237 | /* Return true if this can only be a container, not a member device. |
1238 | * i.e. is and md device and size is zero | |
1239 | */ | |
1240 | int must_be_container(int fd) | |
1241 | { | |
1242 | unsigned long long size; | |
1243 | if (md_get_version(fd) < 0) | |
1244 | return 0; | |
1245 | if (get_dev_size(fd, NULL, &size) == 0) | |
1246 | return 1; | |
1247 | if (size == 0) | |
1248 | return 1; | |
1249 | return 0; | |
1250 | } | |
034b203a TM |
1251 | |
1252 | /* Sets endofpart parameter to the last block used by the last GPT partition on the device. | |
1253 | * Returns: 1 if successful | |
1254 | * -1 for unknown partition type | |
1255 | * 0 for other errors | |
1256 | */ | |
1257 | static int get_gpt_last_partition_end(int fd, unsigned long long *endofpart) | |
1258 | { | |
056b331e | 1259 | struct GPT gpt; |
034b203a TM |
1260 | unsigned char buf[512]; |
1261 | unsigned char empty_gpt_entry[16]= {0}; | |
1262 | struct GPT_part_entry *part; | |
1263 | unsigned long long curr_part_end; | |
1264 | unsigned all_partitions, entry_size; | |
f21e18ca | 1265 | unsigned part_nr; |
034b203a TM |
1266 | |
1267 | *endofpart = 0; | |
1268 | ||
056b331e | 1269 | BUILD_BUG_ON(sizeof(gpt) != 512); |
034b203a TM |
1270 | /* read GPT header */ |
1271 | lseek(fd, 512, SEEK_SET); | |
056b331e | 1272 | if (read(fd, &gpt, 512) != 512) |
034b203a TM |
1273 | return 0; |
1274 | ||
1275 | /* get the number of partition entries and the entry size */ | |
056b331e N |
1276 | all_partitions = __le32_to_cpu(gpt.part_cnt); |
1277 | entry_size = __le32_to_cpu(gpt.part_size); | |
034b203a TM |
1278 | |
1279 | /* Check GPT signature*/ | |
056b331e | 1280 | if (gpt.magic != GPT_SIGNATURE_MAGIC) |
034b203a TM |
1281 | return -1; |
1282 | ||
1283 | /* sanity checks */ | |
1284 | if (all_partitions > 1024 || | |
1285 | entry_size > 512) | |
1286 | return -1; | |
1287 | ||
1288 | /* read first GPT partition entries */ | |
1289 | if (read(fd, buf, 512) != 512) | |
1290 | return 0; | |
1291 | ||
1292 | part = (struct GPT_part_entry*)buf; | |
1293 | ||
1294 | for (part_nr=0; part_nr < all_partitions; part_nr++) { | |
1295 | /* is this valid partition? */ | |
1296 | if (memcmp(part->type_guid, empty_gpt_entry, 16) != 0) { | |
1297 | /* check the last lba for the current partition */ | |
056b331e | 1298 | curr_part_end = __le64_to_cpu(part->ending_lba); |
034b203a TM |
1299 | if (curr_part_end > *endofpart) |
1300 | *endofpart = curr_part_end; | |
1301 | } | |
1302 | ||
1303 | part = (struct GPT_part_entry*)((unsigned char*)part + entry_size); | |
1304 | ||
1305 | if ((unsigned char *)part >= buf + 512) { | |
1306 | if (read(fd, buf, 512) != 512) | |
1307 | return 0; | |
1308 | part = (struct GPT_part_entry*)buf; | |
1309 | } | |
1310 | } | |
1311 | return 1; | |
1312 | } | |
1313 | ||
1314 | /* Sets endofpart parameter to the last block used by the last partition on the device. | |
1315 | * Returns: 1 if successful | |
1316 | * -1 for unknown partition type | |
1317 | * 0 for other errors | |
1318 | */ | |
1319 | static int get_last_partition_end(int fd, unsigned long long *endofpart) | |
1320 | { | |
056b331e | 1321 | struct MBR boot_sect; |
034b203a TM |
1322 | struct MBR_part_record *part; |
1323 | unsigned long long curr_part_end; | |
f21e18ca | 1324 | unsigned part_nr; |
034b203a TM |
1325 | int retval = 0; |
1326 | ||
1327 | *endofpart = 0; | |
1328 | ||
056b331e | 1329 | BUILD_BUG_ON(sizeof(boot_sect) != 512); |
034b203a TM |
1330 | /* read MBR */ |
1331 | lseek(fd, 0, 0); | |
056b331e | 1332 | if (read(fd, &boot_sect, 512) != 512) |
034b203a TM |
1333 | goto abort; |
1334 | ||
1335 | /* check MBP signature */ | |
056b331e | 1336 | if (boot_sect.magic == MBR_SIGNATURE_MAGIC) { |
034b203a TM |
1337 | retval = 1; |
1338 | /* found the correct signature */ | |
056b331e | 1339 | part = boot_sect.parts; |
034b203a TM |
1340 | |
1341 | for (part_nr=0; part_nr < MBR_PARTITIONS; part_nr++) { | |
1342 | /* check for GPT type */ | |
1343 | if (part->part_type == MBR_GPT_PARTITION_TYPE) { | |
1344 | retval = get_gpt_last_partition_end(fd, endofpart); | |
1345 | break; | |
1346 | } | |
1347 | /* check the last used lba for the current partition */ | |
1348 | curr_part_end = __le32_to_cpu(part->first_sect_lba) + | |
1349 | __le32_to_cpu(part->blocks_num); | |
1350 | if (curr_part_end > *endofpart) | |
1351 | *endofpart = curr_part_end; | |
1352 | ||
1353 | part++; | |
1354 | } | |
1355 | } else { | |
1356 | /* Unknown partition table */ | |
1357 | retval = -1; | |
1358 | } | |
1359 | abort: | |
1360 | return retval; | |
1361 | } | |
1362 | ||
1363 | int check_partitions(int fd, char *dname, unsigned long long freesize) | |
1364 | { | |
1365 | /* | |
1366 | * Check where the last partition ends | |
1367 | */ | |
1368 | unsigned long long endofpart; | |
1369 | int ret; | |
1370 | ||
1371 | if ((ret = get_last_partition_end(fd, &endofpart)) > 0) { | |
1372 | /* There appears to be a partition table here */ | |
1373 | if (freesize == 0) { | |
1374 | /* partitions will not be visible in new device */ | |
1375 | fprintf(stderr, | |
1376 | Name ": partition table exists on %s but will be lost or\n" | |
1377 | " meaningless after creating array\n", | |
1378 | dname); | |
1379 | return 1; | |
1380 | } else if (endofpart > freesize) { | |
1381 | /* last partition overlaps metadata */ | |
1382 | fprintf(stderr, | |
1383 | Name ": metadata will over-write last partition on %s.\n", | |
1384 | dname); | |
1385 | return 1; | |
1386 | } | |
1387 | } | |
1388 | return 0; | |
1389 | } | |
1390 | ||
8382f19b NB |
1391 | void get_one_disk(int mdfd, mdu_array_info_t *ainf, mdu_disk_info_t *disk) |
1392 | { | |
1393 | int d; | |
1394 | ioctl(mdfd, GET_ARRAY_INFO, ainf); | |
1395 | for (d = 0 ; d < ainf->raid_disks + ainf->nr_disks ; d++) | |
1396 | if (ioctl(mdfd, GET_DISK_INFO, disk) == 0) | |
1397 | return; | |
1398 | } | |
63152c1b | 1399 | |
a322f70c DW |
1400 | int open_container(int fd) |
1401 | { | |
1402 | /* 'fd' is a block device. Find out if it is in use | |
1403 | * by a container, and return an open fd on that container. | |
1404 | */ | |
1405 | char path[256]; | |
1406 | char *e; | |
1407 | DIR *dir; | |
1408 | struct dirent *de; | |
1409 | int dfd, n; | |
1410 | char buf[200]; | |
1411 | int major, minor; | |
1412 | struct stat st; | |
1413 | ||
1414 | if (fstat(fd, &st) != 0) | |
1415 | return -1; | |
1416 | sprintf(path, "/sys/dev/block/%d:%d/holders", | |
1417 | (int)major(st.st_rdev), (int)minor(st.st_rdev)); | |
1418 | e = path + strlen(path); | |
1419 | ||
1420 | dir = opendir(path); | |
1421 | if (!dir) | |
1422 | return -1; | |
1423 | while ((de = readdir(dir))) { | |
1424 | if (de->d_ino == 0) | |
1425 | continue; | |
1426 | if (de->d_name[0] == '.') | |
1427 | continue; | |
1428 | sprintf(e, "/%s/dev", de->d_name); | |
1429 | dfd = open(path, O_RDONLY); | |
1430 | if (dfd < 0) | |
1431 | continue; | |
1432 | n = read(dfd, buf, sizeof(buf)); | |
1433 | close(dfd); | |
f21e18ca | 1434 | if (n <= 0 || (unsigned)n >= sizeof(buf)) |
a322f70c DW |
1435 | continue; |
1436 | buf[n] = 0; | |
1437 | if (sscanf(buf, "%d:%d", &major, &minor) != 2) | |
1438 | continue; | |
1439 | sprintf(buf, "%d:%d", major, minor); | |
1440 | dfd = dev_open(buf, O_RDONLY); | |
1441 | if (dfd >= 0) { | |
1442 | closedir(dir); | |
1443 | return dfd; | |
1444 | } | |
1445 | } | |
355726fa | 1446 | closedir(dir); |
a322f70c DW |
1447 | return -1; |
1448 | } | |
1449 | ||
33414a01 DW |
1450 | struct superswitch *version_to_superswitch(char *vers) |
1451 | { | |
1452 | int i; | |
1453 | ||
1454 | for (i = 0; superlist[i]; i++) { | |
1455 | struct superswitch *ss = superlist[i]; | |
1456 | ||
1457 | if (strcmp(vers, ss->name) == 0) | |
1458 | return ss; | |
1459 | } | |
1460 | ||
1461 | return NULL; | |
1462 | } | |
1463 | ||
1464 | int is_container_member(struct mdstat_ent *mdstat, char *container) | |
1465 | { | |
1466 | if (mdstat->metadata_version == NULL || | |
1467 | strncmp(mdstat->metadata_version, "external:", 9) != 0 || | |
1468 | !is_subarray(mdstat->metadata_version+9) || | |
1469 | strncmp(mdstat->metadata_version+10, container, strlen(container)) != 0 || | |
1470 | mdstat->metadata_version[10+strlen(container)] != '/') | |
1471 | return 0; | |
1472 | ||
1473 | return 1; | |
1474 | } | |
1475 | ||
1476 | int is_subarray_active(char *subarray, char *container) | |
1477 | { | |
1478 | struct mdstat_ent *mdstat = mdstat_read(0, 0); | |
1479 | struct mdstat_ent *ent; | |
1480 | ||
e5408a32 DW |
1481 | for (ent = mdstat; ent; ent = ent->next) |
1482 | if (is_container_member(ent, container)) | |
1483 | if (!subarray || | |
1484 | strcmp(to_subarray(ent, container), subarray) == 0) | |
33414a01 | 1485 | break; |
33414a01 DW |
1486 | |
1487 | free_mdstat(mdstat); | |
1488 | ||
1489 | return ent != NULL; | |
1490 | } | |
1491 | ||
1dccfff9 DW |
1492 | int is_container_active(char *container) |
1493 | { | |
1494 | return is_subarray_active(NULL, container); | |
1495 | } | |
1496 | ||
33414a01 DW |
1497 | /* open_subarray - opens a subarray in a container |
1498 | * @dev: container device name | |
feab51f8 | 1499 | * @st: empty supertype |
33414a01 DW |
1500 | * @quiet: block reporting errors flag |
1501 | * | |
1502 | * On success returns an fd to a container and fills in *st | |
1503 | */ | |
feab51f8 | 1504 | int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet) |
33414a01 DW |
1505 | { |
1506 | struct mdinfo *mdi; | |
a951a4f7 | 1507 | struct mdinfo *info; |
33414a01 DW |
1508 | int fd, err = 1; |
1509 | ||
1510 | fd = open(dev, O_RDWR|O_EXCL); | |
1511 | if (fd < 0) { | |
1512 | if (!quiet) | |
1513 | fprintf(stderr, Name ": Couldn't open %s, aborting\n", | |
1514 | dev); | |
1515 | return 2; | |
1516 | } | |
1517 | ||
1518 | st->devnum = fd2devnum(fd); | |
1519 | if (st->devnum == NoMdDev) { | |
1520 | if (!quiet) | |
1521 | fprintf(stderr, | |
1522 | Name ": Failed to determine device number for %s\n", | |
1523 | dev); | |
1524 | goto close_fd; | |
1525 | } | |
1526 | ||
1527 | mdi = sysfs_read(fd, st->devnum, GET_VERSION|GET_LEVEL); | |
1528 | if (!mdi) { | |
1529 | if (!quiet) | |
1530 | fprintf(stderr, Name ": Failed to read sysfs for %s\n", | |
1531 | dev); | |
1532 | goto close_fd; | |
1533 | } | |
1534 | ||
1535 | if (mdi->array.level != UnSet) { | |
1536 | if (!quiet) | |
1537 | fprintf(stderr, Name ": %s is not a container\n", dev); | |
1538 | goto free_sysfs; | |
1539 | } | |
1540 | ||
1541 | st->ss = version_to_superswitch(mdi->text_version); | |
1542 | if (!st->ss) { | |
1543 | if (!quiet) | |
1544 | fprintf(stderr, | |
1545 | Name ": Operation not supported for %s metadata\n", | |
1546 | mdi->text_version); | |
1547 | goto free_sysfs; | |
1548 | } | |
1549 | ||
1550 | st->devname = devnum2devname(st->devnum); | |
1551 | if (!st->devname) { | |
1552 | if (!quiet) | |
1553 | fprintf(stderr, Name ": Failed to allocate device name\n"); | |
1554 | goto free_sysfs; | |
1555 | } | |
1556 | ||
db20d413 | 1557 | if (!st->ss->load_container) { |
33414a01 | 1558 | if (!quiet) |
db20d413 | 1559 | fprintf(stderr, Name ": %s is not a container\n", dev); |
33414a01 DW |
1560 | goto free_name; |
1561 | } | |
1562 | ||
db20d413 | 1563 | if (st->ss->load_container(st, fd, NULL)) { |
33414a01 | 1564 | if (!quiet) |
db20d413 N |
1565 | fprintf(stderr, Name ": Failed to load metadata for %s\n", |
1566 | dev); | |
1567 | goto free_name; | |
33414a01 DW |
1568 | } |
1569 | ||
a951a4f7 N |
1570 | info = st->ss->container_content(st, subarray); |
1571 | if (!info) { | |
1572 | if (!quiet) | |
1573 | fprintf(stderr, Name ": Failed to find subarray-%s in %s\n", | |
1574 | subarray, dev); | |
1575 | goto free_super; | |
1576 | } | |
1577 | free(info); | |
1578 | ||
33414a01 DW |
1579 | err = 0; |
1580 | ||
1581 | free_super: | |
1582 | if (err) | |
1583 | st->ss->free_super(st); | |
1584 | free_name: | |
1585 | if (err) | |
1586 | free(st->devname); | |
1587 | free_sysfs: | |
1588 | sysfs_free(mdi); | |
1589 | close_fd: | |
1590 | if (err) | |
1591 | close(fd); | |
1592 | ||
1593 | if (err) | |
1594 | return -1; | |
1595 | else | |
1596 | return fd; | |
1597 | } | |
1598 | ||
7801ac20 N |
1599 | int add_disk(int mdfd, struct supertype *st, |
1600 | struct mdinfo *sra, struct mdinfo *info) | |
1601 | { | |
1602 | /* Add a device to an array, in one of 2 ways. */ | |
1603 | int rv; | |
1604 | #ifndef MDASSEMBLE | |
1605 | if (st->ss->external) { | |
d23534e4 DW |
1606 | if (info->disk.state & (1<<MD_DISK_SYNC)) |
1607 | info->recovery_start = MaxSector; | |
1608 | else | |
1609 | info->recovery_start = 0; | |
2904b26f | 1610 | rv = sysfs_add_disk(sra, info, 0); |
7801ac20 N |
1611 | if (! rv) { |
1612 | struct mdinfo *sd2; | |
f35f2525 N |
1613 | for (sd2 = sra->devs; sd2; sd2=sd2->next) |
1614 | if (sd2 == info) | |
1615 | break; | |
1616 | if (sd2 == NULL) { | |
1617 | sd2 = malloc(sizeof(*sd2)); | |
1618 | *sd2 = *info; | |
1619 | sd2->next = sra->devs; | |
1620 | sra->devs = sd2; | |
1621 | } | |
7801ac20 N |
1622 | } |
1623 | } else | |
1624 | #endif | |
1625 | rv = ioctl(mdfd, ADD_NEW_DISK, &info->disk); | |
1626 | return rv; | |
1627 | } | |
1628 | ||
f35f2525 N |
1629 | int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info) |
1630 | { | |
1631 | /* Initialise kernel's knowledge of array. | |
1632 | * This varies between externally managed arrays | |
1633 | * and older kernels | |
1634 | */ | |
1635 | int vers = md_get_version(mdfd); | |
1636 | int rv; | |
1637 | ||
1638 | #ifndef MDASSEMBLE | |
1639 | if (st->ss->external) | |
1640 | rv = sysfs_set_array(info, vers); | |
1641 | else | |
1642 | #endif | |
1643 | if ((vers % 100) >= 1) { /* can use different versions */ | |
1644 | mdu_array_info_t inf; | |
1645 | memset(&inf, 0, sizeof(inf)); | |
1646 | inf.major_version = info->array.major_version; | |
1647 | inf.minor_version = info->array.minor_version; | |
1648 | rv = ioctl(mdfd, SET_ARRAY_INFO, &inf); | |
1649 | } else | |
1650 | rv = ioctl(mdfd, SET_ARRAY_INFO, NULL); | |
1651 | return rv; | |
1652 | } | |
1653 | ||
1e5c6983 DW |
1654 | unsigned long long min_recovery_start(struct mdinfo *array) |
1655 | { | |
1656 | /* find the minimum recovery_start in an array for metadata | |
1657 | * formats that only record per-array recovery progress instead | |
1658 | * of per-device | |
1659 | */ | |
1660 | unsigned long long recovery_start = MaxSector; | |
1661 | struct mdinfo *d; | |
1662 | ||
1663 | for (d = array->devs; d; d = d->next) | |
1664 | recovery_start = min(recovery_start, d->recovery_start); | |
1665 | ||
1666 | return recovery_start; | |
1667 | } | |
1668 | ||
2f6079dc NB |
1669 | char *devnum2devname(int num) |
1670 | { | |
1671 | char name[100]; | |
1f0769d7 | 1672 | if (num >= 0) |
2f6079dc NB |
1673 | sprintf(name, "md%d", num); |
1674 | else | |
1675 | sprintf(name, "md_d%d", -1-num); | |
1676 | return strdup(name); | |
1677 | } | |
1678 | ||
77472ff8 NB |
1679 | int devname2devnum(char *name) |
1680 | { | |
1681 | char *ep; | |
1682 | int num; | |
1683 | if (strncmp(name, "md_d", 4)==0) | |
1684 | num = -1-strtoul(name+4, &ep, 10); | |
1685 | else | |
1686 | num = strtoul(name+2, &ep, 10); | |
1687 | return num; | |
1688 | } | |
1689 | ||
c94709e8 | 1690 | int stat2devnum(struct stat *st) |
2f6079dc | 1691 | { |
d7ab966b N |
1692 | char path[30]; |
1693 | char link[200]; | |
1694 | char *cp; | |
1695 | int n; | |
1696 | ||
c94709e8 DW |
1697 | if ((S_IFMT & st->st_mode) == S_IFBLK) { |
1698 | if (major(st->st_rdev) == MD_MAJOR) | |
1699 | return minor(st->st_rdev); | |
f21e18ca | 1700 | else if (major(st->st_rdev) == (unsigned)get_mdp_major()) |
d7ab966b N |
1701 | return -1- (minor(st->st_rdev)>>MdpMinorShift); |
1702 | ||
1703 | /* must be an extended-minor partition. Look at the | |
1704 | * /sys/dev/block/%d:%d link which must look like | |
1705 | * ../../block/mdXXX/mdXXXpYY | |
1706 | */ | |
1707 | sprintf(path, "/sys/dev/block/%d:%d", major(st->st_rdev), | |
1708 | minor(st->st_rdev)); | |
1709 | n = readlink(path, link, sizeof(link)-1); | |
1710 | if (n <= 0) | |
1711 | return NoMdDev; | |
1712 | link[n] = 0; | |
1713 | cp = strrchr(link, '/'); | |
1714 | if (cp) *cp = 0; | |
1715 | cp = strchr(link, '/'); | |
1716 | if (cp && strncmp(cp, "/md", 3) == 0) | |
1717 | return devname2devnum(cp+1); | |
2f6079dc | 1718 | } |
d7ab966b | 1719 | return NoMdDev; |
c94709e8 DW |
1720 | |
1721 | } | |
1722 | ||
1723 | int fd2devnum(int fd) | |
1724 | { | |
1725 | struct stat stb; | |
1726 | if (fstat(fd, &stb) == 0) | |
1727 | return stat2devnum(&stb); | |
d7ab966b | 1728 | return NoMdDev; |
2f6079dc NB |
1729 | } |
1730 | ||
24f6f99b | 1731 | int mdmon_pid(int devnum) |
a931db9e NB |
1732 | { |
1733 | char path[100]; | |
1734 | char pid[10]; | |
1735 | int fd; | |
1736 | int n; | |
10013317 PHC |
1737 | char *devname = devnum2devname(devnum); |
1738 | ||
753cf905 | 1739 | sprintf(path, "%s/%s.pid", MDMON_DIR, devname); |
10013317 PHC |
1740 | free(devname); |
1741 | ||
24f6f99b | 1742 | fd = open(path, O_RDONLY | O_NOATIME, 0); |
a931db9e NB |
1743 | |
1744 | if (fd < 0) | |
cf556303 | 1745 | return -1; |
a931db9e NB |
1746 | n = read(fd, pid, 9); |
1747 | close(fd); | |
1748 | if (n <= 0) | |
cf556303 | 1749 | return -1; |
24f6f99b | 1750 | return atoi(pid); |
a931db9e NB |
1751 | } |
1752 | ||
24f6f99b | 1753 | int mdmon_running(int devnum) |
a931db9e | 1754 | { |
24f6f99b N |
1755 | int pid = mdmon_pid(devnum); |
1756 | if (pid <= 0) | |
a931db9e | 1757 | return 0; |
24f6f99b | 1758 | if (kill(pid, 0) == 0) |
a931db9e NB |
1759 | return 1; |
1760 | return 0; | |
1761 | } | |
1762 | ||
8850ee3e N |
1763 | int start_mdmon(int devnum) |
1764 | { | |
1765 | int i; | |
44d2e365 | 1766 | int len; |
9fe32043 N |
1767 | pid_t pid; |
1768 | int status; | |
44d2e365 N |
1769 | char pathbuf[1024]; |
1770 | char *paths[4] = { | |
1771 | pathbuf, | |
1772 | "/sbin/mdmon", | |
1773 | "mdmon", | |
1774 | NULL | |
1775 | }; | |
8850ee3e | 1776 | |
40ebbb9c | 1777 | if (check_env("MDADM_NO_MDMON")) |
8850ee3e N |
1778 | return 0; |
1779 | ||
44d2e365 N |
1780 | len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf)); |
1781 | if (len > 0) { | |
1782 | char *sl; | |
1783 | pathbuf[len] = 0; | |
1784 | sl = strrchr(pathbuf, '/'); | |
1785 | if (sl) | |
1786 | sl++; | |
1787 | else | |
1788 | sl = pathbuf; | |
1789 | strcpy(sl, "mdmon"); | |
1790 | } else | |
1791 | pathbuf[0] = '\0'; | |
1792 | ||
8850ee3e N |
1793 | switch(fork()) { |
1794 | case 0: | |
1795 | /* FIXME yuk. CLOSE_EXEC?? */ | |
1796 | for (i=3; i < 100; i++) | |
1797 | close(i); | |
44d2e365 N |
1798 | for (i=0; paths[i]; i++) |
1799 | if (paths[i][0]) | |
1800 | execl(paths[i], "mdmon", | |
e8a70c89 N |
1801 | devnum2devname(devnum), |
1802 | NULL); | |
8850ee3e N |
1803 | exit(1); |
1804 | case -1: fprintf(stderr, Name ": cannot run mdmon. " | |
1805 | "Array remains readonly\n"); | |
1806 | return -1; | |
9fe32043 N |
1807 | default: /* parent - good */ |
1808 | pid = wait(&status); | |
1809 | if (pid < 0 || status != 0) | |
1810 | return -1; | |
8850ee3e N |
1811 | } |
1812 | return 0; | |
1813 | } | |
1814 | ||
40ebbb9c | 1815 | int check_env(char *name) |
5dcfcb71 | 1816 | { |
40ebbb9c | 1817 | char *val = getenv(name); |
5dcfcb71 DW |
1818 | |
1819 | if (val && atoi(val) == 1) | |
1820 | return 1; | |
1821 | ||
1822 | return 0; | |
1823 | } | |
1824 | ||
148acb7b DW |
1825 | __u32 random32(void) |
1826 | { | |
1827 | __u32 rv; | |
1828 | int rfd = open("/dev/urandom", O_RDONLY); | |
1829 | if (rfd < 0 || read(rfd, &rv, 4) != 4) | |
1830 | rv = random(); | |
1831 | if (rfd >= 0) | |
1832 | close(rfd); | |
1833 | return rv; | |
1834 | } | |
1835 | ||
0e600426 | 1836 | #ifndef MDASSEMBLE |
edd8d13c NB |
1837 | int flush_metadata_updates(struct supertype *st) |
1838 | { | |
1839 | int sfd; | |
1840 | if (!st->updates) { | |
1841 | st->update_tail = NULL; | |
1842 | return -1; | |
1843 | } | |
1844 | ||
1845 | sfd = connect_monitor(devnum2devname(st->container_dev)); | |
1846 | if (sfd < 0) | |
1847 | return -1; | |
1848 | ||
1849 | while (st->updates) { | |
1850 | struct metadata_update *mu = st->updates; | |
1851 | st->updates = mu->next; | |
1852 | ||
1853 | send_message(sfd, mu, 0); | |
1854 | wait_reply(sfd, 0); | |
1855 | free(mu->buf); | |
1856 | free(mu); | |
1857 | } | |
1858 | ack(sfd, 0); | |
1859 | wait_reply(sfd, 0); | |
1860 | close(sfd); | |
1861 | st->update_tail = NULL; | |
1862 | return 0; | |
1863 | } | |
1864 | ||
1865 | void append_metadata_update(struct supertype *st, void *buf, int len) | |
1866 | { | |
1867 | ||
1868 | struct metadata_update *mu = malloc(sizeof(*mu)); | |
1869 | ||
1870 | mu->buf = buf; | |
1871 | mu->len = len; | |
1872 | mu->space = NULL; | |
1873 | mu->next = NULL; | |
1874 | *st->update_tail = mu; | |
1875 | st->update_tail = &mu->next; | |
1876 | } | |
0e600426 | 1877 | #endif /* MDASSEMBLE */ |
a931db9e | 1878 | |
fe6729fa NB |
1879 | #ifdef __TINYC__ |
1880 | /* tinyc doesn't optimize this check in ioctl.h out ... */ | |
1881 | unsigned int __invalid_size_argument_for_IOC = 0; | |
1882 | #endif | |
1883 |