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