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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; |
f161d047 | 149 | int a = 0, b = 0,c = 0; |
64c4757e NB |
150 | if (uname(&name) <0) |
151 | return -1; | |
152 | ||
98c6faba NB |
153 | cp = name.release; |
154 | a = strtoul(cp, &cp, 10); | |
f161d047 N |
155 | if (*cp == '.') |
156 | b = strtoul(cp+1, &cp, 10); | |
157 | if (*cp == '.') | |
158 | c = strtoul(cp+1, &cp, 10); | |
98c6faba | 159 | |
682c7051 | 160 | return (a*1000000)+(b*1000)+c; |
64c4757e NB |
161 | } |
162 | ||
71204a50 | 163 | #ifndef MDASSEMBLE |
bc77ed53 DW |
164 | int mdadm_version(char *version) |
165 | { | |
166 | int a, b, c; | |
167 | char *cp; | |
168 | ||
169 | if (!version) | |
170 | version = Version; | |
171 | ||
172 | cp = strchr(version, '-'); | |
173 | if (!cp || *(cp+1) != ' ' || *(cp+2) != 'v') | |
174 | return -1; | |
175 | cp += 3; | |
176 | a = strtoul(cp, &cp, 10); | |
177 | if (*cp != '.') | |
178 | return -1; | |
179 | b = strtoul(cp+1, &cp, 10); | |
180 | if (*cp == '.') | |
181 | c = strtoul(cp+1, &cp, 10); | |
182 | else | |
183 | c = 0; | |
184 | if (*cp != ' ' && *cp != '-') | |
185 | return -1; | |
186 | return (a*1000000)+(b*1000)+c; | |
187 | } | |
188 | ||
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 | ||
bfd76b93 CA |
298 | int test_partition_from_id(dev_t id) |
299 | { | |
300 | char buf[20]; | |
301 | int fd, rv; | |
302 | ||
303 | sprintf(buf, "%d:%d", major(id), minor(id)); | |
304 | fd = dev_open(buf, O_RDONLY); | |
305 | if (fd < 0) | |
306 | return -1; | |
307 | rv = test_partition(fd); | |
308 | close(fd); | |
309 | return rv; | |
310 | } | |
691c6ee1 | 311 | |
583315d9 | 312 | int enough(int level, int raid_disks, int layout, int clean, |
265e0f17 | 313 | char *avail, int avail_disks) |
64c4757e | 314 | { |
265e0f17 | 315 | int copies, first; |
64c4757e | 316 | switch (level) { |
265e0f17 NB |
317 | case 10: |
318 | /* This is the tricky one - we need to check | |
319 | * which actual disks are present. | |
320 | */ | |
702b557b | 321 | copies = (layout&255)* ((layout>>8) & 255); |
265e0f17 NB |
322 | first=0; |
323 | do { | |
324 | /* there must be one of the 'copies' form 'first' */ | |
325 | int n = copies; | |
326 | int cnt=0; | |
327 | while (n--) { | |
328 | if (avail[first]) | |
329 | cnt++; | |
330 | first = (first+1) % raid_disks; | |
331 | } | |
332 | if (cnt == 0) | |
333 | return 0; | |
334 | ||
335 | } while (first != 0); | |
336 | return 1; | |
e5329c37 | 337 | |
df0d4ea0 | 338 | case LEVEL_MULTIPATH: |
e0d19036 | 339 | return avail_disks>= 1; |
df0d4ea0 | 340 | case LEVEL_LINEAR: |
64c4757e NB |
341 | case 0: |
342 | return avail_disks == raid_disks; | |
343 | case 1: | |
344 | return avail_disks >= 1; | |
345 | case 4: | |
346 | case 5: | |
583315d9 NB |
347 | if (clean) |
348 | return avail_disks >= raid_disks-1; | |
349 | else | |
350 | return avail_disks >= raid_disks; | |
98c6faba | 351 | case 6: |
583315d9 NB |
352 | if (clean) |
353 | return avail_disks >= raid_disks-2; | |
354 | else | |
355 | return avail_disks >= raid_disks; | |
64c4757e NB |
356 | default: |
357 | return 0; | |
358 | } | |
359 | } | |
360 | ||
8453e704 N |
361 | int enough_fd(int fd) |
362 | { | |
363 | struct mdu_array_info_s array; | |
364 | struct mdu_disk_info_s disk; | |
365 | int avail_disks = 0; | |
366 | int i; | |
367 | char *avail; | |
368 | ||
369 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0 || | |
370 | array.raid_disks <= 0) | |
371 | return 0; | |
372 | avail = calloc(array.raid_disks, 1); | |
9e6d9291 | 373 | for (i=0; i < 1024 && array.nr_disks > 0; i++) { |
8453e704 N |
374 | disk.number = i; |
375 | if (ioctl(fd, GET_DISK_INFO, &disk) != 0) | |
376 | continue; | |
9e6d9291 N |
377 | if (disk.major == 0 && disk.minor == 0) |
378 | continue; | |
379 | array.nr_disks--; | |
380 | ||
8453e704 N |
381 | if (! (disk.state & (1<<MD_DISK_SYNC))) |
382 | continue; | |
383 | if (disk.raid_disk < 0 || disk.raid_disk >= array.raid_disks) | |
384 | continue; | |
385 | avail_disks++; | |
386 | avail[disk.raid_disk] = 1; | |
387 | } | |
388 | /* This is used on an active array, so assume it is clean */ | |
389 | return enough(array.level, array.raid_disks, array.layout, | |
390 | 1, | |
391 | avail, avail_disks); | |
392 | } | |
393 | ||
394 | ||
22e263f6 AC |
395 | const int uuid_zero[4] = { 0, 0, 0, 0 }; |
396 | ||
f277ce36 | 397 | int same_uuid(int a[4], int b[4], int swapuuid) |
64c4757e | 398 | { |
f277ce36 NB |
399 | if (swapuuid) { |
400 | /* parse uuids are hostendian. | |
401 | * uuid's from some superblocks are big-ending | |
aba69144 | 402 | * if there is a difference, we need to swap.. |
f277ce36 NB |
403 | */ |
404 | unsigned char *ac = (unsigned char *)a; | |
405 | unsigned char *bc = (unsigned char *)b; | |
406 | int i; | |
407 | for (i=0; i<16; i+= 4) { | |
408 | if (ac[i+0] != bc[i+3] || | |
409 | ac[i+1] != bc[i+2] || | |
410 | ac[i+2] != bc[i+1] || | |
411 | ac[i+3] != bc[i+0]) | |
412 | return 0; | |
413 | } | |
414 | return 1; | |
415 | } else { | |
416 | if (a[0]==b[0] && | |
417 | a[1]==b[1] && | |
418 | a[2]==b[2] && | |
419 | a[3]==b[3]) | |
420 | return 1; | |
421 | return 0; | |
422 | } | |
64c4757e | 423 | } |
350f29f9 NB |
424 | void copy_uuid(void *a, int b[4], int swapuuid) |
425 | { | |
426 | if (swapuuid) { | |
427 | /* parse uuids are hostendian. | |
428 | * uuid's from some superblocks are big-ending | |
429 | * if there is a difference, we need to swap.. | |
430 | */ | |
431 | unsigned char *ac = (unsigned char *)a; | |
432 | unsigned char *bc = (unsigned char *)b; | |
433 | int i; | |
434 | for (i=0; i<16; i+= 4) { | |
435 | ac[i+0] = bc[i+3]; | |
436 | ac[i+1] = bc[i+2]; | |
437 | ac[i+2] = bc[i+1]; | |
438 | ac[i+3] = bc[i+0]; | |
439 | } | |
440 | } else | |
441 | memcpy(a, b, 16); | |
442 | } | |
64c4757e | 443 | |
aae5a112 | 444 | char *__fname_from_uuid(int id[4], int swap, char *buf, char sep) |
d7288ddc | 445 | { |
9968e376 | 446 | int i, j; |
d7288ddc N |
447 | char uuid[16]; |
448 | char *c = buf; | |
449 | strcpy(c, "UUID-"); | |
450 | c += strlen(c); | |
aae5a112 | 451 | copy_uuid(uuid, id, swap); |
9968e376 | 452 | for (i = 0; i < 4; i++) { |
9968e376 | 453 | if (i) |
ff54de6e | 454 | *c++ = sep; |
9968e376 DW |
455 | for (j = 3; j >= 0; j--) { |
456 | sprintf(c,"%02x", (unsigned char) uuid[j+4*i]); | |
457 | c+= 2; | |
458 | } | |
d7288ddc N |
459 | } |
460 | return buf; | |
aae5a112 DW |
461 | |
462 | } | |
463 | ||
464 | char *fname_from_uuid(struct supertype *st, struct mdinfo *info, char *buf, char sep) | |
465 | { | |
86983cce N |
466 | // dirty hack to work around an issue with super1 superblocks... |
467 | // super1 superblocks need swapuuid set in order for assembly to | |
468 | // work, but can't have it set if we want this printout to match | |
469 | // all the other uuid printouts in super1.c, so we force swapuuid | |
470 | // to 1 to make our printout match the rest of super1 | |
471 | return __fname_from_uuid(info->uuid, (st->ss == &super1) ? 1 : st->ss->swapuuid, buf, sep); | |
d7288ddc N |
472 | } |
473 | ||
435d4ebb | 474 | #ifndef MDASSEMBLE |
682c7051 NB |
475 | int check_ext2(int fd, char *name) |
476 | { | |
477 | /* | |
478 | * Check for an ext2fs file system. | |
479 | * Superblock is always 1K at 1K offset | |
480 | * | |
481 | * s_magic is le16 at 56 == 0xEF53 | |
482 | * report mtime - le32 at 44 | |
483 | * blocks - le32 at 4 | |
484 | * logblksize - le32 at 24 | |
485 | */ | |
486 | unsigned char sb[1024]; | |
487 | time_t mtime; | |
488 | int size, bsize; | |
489 | if (lseek(fd, 1024,0)!= 1024) | |
490 | return 0; | |
491 | if (read(fd, sb, 1024)!= 1024) | |
492 | return 0; | |
493 | if (sb[56] != 0x53 || sb[57] != 0xef) | |
494 | return 0; | |
495 | ||
496 | mtime = sb[44]|(sb[45]|(sb[46]|sb[47]<<8)<<8)<<8; | |
497 | bsize = sb[24]|(sb[25]|(sb[26]|sb[27]<<8)<<8)<<8; | |
498 | size = sb[4]|(sb[5]|(sb[6]|sb[7]<<8)<<8)<<8; | |
499 | fprintf(stderr, Name ": %s appears to contain an ext2fs file system\n", | |
500 | name); | |
501 | fprintf(stderr," size=%dK mtime=%s", | |
502 | size*(1<<bsize), ctime(&mtime)); | |
503 | return 1; | |
504 | } | |
505 | ||
506 | int check_reiser(int fd, char *name) | |
507 | { | |
508 | /* | |
509 | * superblock is at 64K | |
510 | * size is 1024; | |
511 | * Magic string "ReIsErFs" or "ReIsEr2Fs" at 52 | |
512 | * | |
513 | */ | |
514 | unsigned char sb[1024]; | |
881990a2 | 515 | unsigned long size; |
682c7051 NB |
516 | if (lseek(fd, 64*1024, 0) != 64*1024) |
517 | return 0; | |
518 | if (read(fd, sb, 1024) != 1024) | |
519 | return 0; | |
a46f4061 NB |
520 | if (strncmp((char*)sb+52, "ReIsErFs",8)!=0 && |
521 | strncmp((char*)sb+52, "ReIsEr2Fs",9)!=0) | |
682c7051 NB |
522 | return 0; |
523 | fprintf(stderr, Name ": %s appears to contain a reiserfs file system\n",name); | |
524 | size = sb[0]|(sb[1]|(sb[2]|sb[3]<<8)<<8)<<8; | |
881990a2 | 525 | fprintf(stderr, " size = %luK\n", size*4); |
aba69144 | 526 | |
682c7051 NB |
527 | return 1; |
528 | } | |
529 | ||
530 | int check_raid(int fd, char *name) | |
531 | { | |
4b1ac34b | 532 | struct mdinfo info; |
682c7051 | 533 | time_t crtime; |
d078d77c | 534 | char *level; |
82d9eba6 | 535 | struct supertype *st = guess_super(fd); |
f9ce90ba | 536 | |
82d9eba6 | 537 | if (!st) return 0; |
4a96d9ff | 538 | st->ignore_hw_compat = 1; |
3da92f27 | 539 | st->ss->load_super(st, fd, name); |
82d9eba6 NB |
540 | /* Looks like a raid array .. */ |
541 | fprintf(stderr, Name ": %s appears to be part of a raid array:\n", | |
542 | name); | |
a5d85af7 | 543 | st->ss->getinfo_super(st, &info, NULL); |
3da92f27 | 544 | st->ss->free_super(st); |
82d9eba6 | 545 | crtime = info.array.ctime; |
d078d77c NB |
546 | level = map_num(pers, info.array.level); |
547 | if (!level) level = "-unknown-"; | |
548 | fprintf(stderr, " level=%s devices=%d ctime=%s", | |
549 | level, info.array.raid_disks, ctime(&crtime)); | |
82d9eba6 | 550 | return 1; |
682c7051 NB |
551 | } |
552 | ||
682c7051 NB |
553 | int ask(char *mesg) |
554 | { | |
555 | char *add = ""; | |
556 | int i; | |
557 | for (i=0; i<5; i++) { | |
558 | char buf[100]; | |
559 | fprintf(stderr, "%s%s", mesg, add); | |
560 | fflush(stderr); | |
561 | if (fgets(buf, 100, stdin)==NULL) | |
562 | return 0; | |
563 | if (buf[0]=='y' || buf[0]=='Y') | |
564 | return 1; | |
565 | if (buf[0]=='n' || buf[0]=='N') | |
566 | return 0; | |
567 | add = "(y/n) "; | |
568 | } | |
569 | fprintf(stderr, Name ": assuming 'no'\n"); | |
570 | return 0; | |
571 | } | |
435d4ebb | 572 | #endif /* MDASSEMBLE */ |
682c7051 | 573 | |
8d80900b | 574 | int is_standard(char *dev, int *nump) |
e5329c37 NB |
575 | { |
576 | /* tests if dev is a "standard" md dev name. | |
577 | * i.e if the last component is "/dNN" or "/mdNN", | |
aba69144 | 578 | * where NN is a string of digits |
598f0d58 NB |
579 | * Returns 1 if a partitionable standard, |
580 | * -1 if non-partitonable, | |
581 | * 0 if not a standard name. | |
e5329c37 | 582 | */ |
8d80900b NB |
583 | char *d = strrchr(dev, '/'); |
584 | int type=0; | |
585 | int num; | |
586 | if (!d) | |
e5329c37 | 587 | return 0; |
8d80900b NB |
588 | if (strncmp(d, "/d",2)==0) |
589 | d += 2, type=1; /* /dev/md/dN{pM} */ | |
590 | else if (strncmp(d, "/md_d", 5)==0) | |
2b4ca8f0 | 591 | d += 5, type=1; /* /dev/md_dN{pM} */ |
8d80900b NB |
592 | else if (strncmp(d, "/md", 3)==0) |
593 | d += 3, type=-1; /* /dev/mdN */ | |
594 | else if (d-dev > 3 && strncmp(d-2, "md/", 3)==0) | |
5a6d1148 | 595 | d += 1, type=-1; /* /dev/md/N */ |
e5329c37 NB |
596 | else |
597 | return 0; | |
8d80900b | 598 | if (!*d) |
e5329c37 | 599 | return 0; |
8d80900b NB |
600 | num = atoi(d); |
601 | while (isdigit(*d)) | |
602 | d++; | |
603 | if (*d) | |
e5329c37 | 604 | return 0; |
8d80900b NB |
605 | if (nump) *nump = num; |
606 | ||
607 | return type; | |
e5329c37 NB |
608 | } |
609 | ||
4b1ac34b | 610 | unsigned long calc_csum(void *super, int bytes) |
82b27616 | 611 | { |
56eb10c0 | 612 | unsigned long long newcsum = 0; |
82b27616 | 613 | int i; |
4b1ac34b NB |
614 | unsigned int csum; |
615 | unsigned int *superc = (unsigned int*) super; | |
82b27616 | 616 | |
4b1ac34b | 617 | for(i=0; i<bytes/4; i++) |
82b27616 NB |
618 | newcsum+= superc[i]; |
619 | csum = (newcsum& 0xffffffff) + (newcsum>>32); | |
570c0542 | 620 | #ifdef __alpha__ |
aba69144 | 621 | /* The in-kernel checksum calculation is always 16bit on |
570c0542 NB |
622 | * the alpha, though it is 32 bit on i386... |
623 | * I wonder what it is elsewhere... (it uses and API in | |
624 | * a way that it shouldn't). | |
625 | */ | |
626 | csum = (csum & 0xffff) + (csum >> 16); | |
627 | csum = (csum & 0xffff) + (csum >> 16); | |
628 | #endif | |
82b27616 NB |
629 | return csum; |
630 | } | |
cd29a5c8 | 631 | |
435d4ebb | 632 | #ifndef MDASSEMBLE |
56eb10c0 | 633 | char *human_size(long long bytes) |
cd29a5c8 NB |
634 | { |
635 | static char buf[30]; | |
d5d3721e NB |
636 | |
637 | /* We convert bytes to either centi-M{ega,ibi}bytes or | |
638 | * centi-G{igi,ibi}bytes, with appropriate rounding, | |
639 | * and then print 1/100th of those as a decimal. | |
640 | * We allow upto 2048Megabytes before converting to | |
641 | * gigabytes, as that shows more precision and isn't | |
642 | * too large a number. | |
01619b48 | 643 | * Terabytes are not yet handled. |
d5d3721e | 644 | */ |
cd29a5c8 | 645 | |
56eb10c0 | 646 | if (bytes < 5000*1024) |
cd29a5c8 | 647 | buf[0]=0; |
d5d3721e NB |
648 | else if (bytes < 2*1024LL*1024LL*1024LL) { |
649 | long cMiB = (bytes / ( (1LL<<20) / 200LL ) +1) /2; | |
650 | long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2; | |
8f23b0b3 | 651 | snprintf(buf, sizeof(buf), " (%ld.%02ld MiB %ld.%02ld MB)", |
d5d3721e NB |
652 | cMiB/100 , cMiB % 100, |
653 | cMB/100, cMB % 100); | |
654 | } else { | |
655 | long cGiB = (bytes / ( (1LL<<30) / 200LL ) +1) /2; | |
656 | long cGB = (bytes / (1000000000LL/200LL ) +1) /2; | |
8f23b0b3 | 657 | snprintf(buf, sizeof(buf), " (%ld.%02ld GiB %ld.%02ld GB)", |
d5d3721e NB |
658 | cGiB/100 , cGiB % 100, |
659 | cGB/100, cGB % 100); | |
660 | } | |
cd29a5c8 NB |
661 | return buf; |
662 | } | |
e0d19036 NB |
663 | |
664 | char *human_size_brief(long long bytes) | |
665 | { | |
666 | static char buf[30]; | |
e0d19036 NB |
667 | |
668 | if (bytes < 5000*1024) | |
8f23b0b3 | 669 | snprintf(buf, sizeof(buf), "%ld.%02ldKiB", |
bd526cee | 670 | (long)(bytes>>10), (long)(((bytes&1023)*100+512)/1024) |
e0d19036 NB |
671 | ); |
672 | else if (bytes < 2*1024LL*1024LL*1024LL) | |
8f23b0b3 | 673 | snprintf(buf, sizeof(buf), "%ld.%02ldMiB", |
e0d19036 | 674 | (long)(bytes>>20), |
bd526cee | 675 | (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100) |
e0d19036 NB |
676 | ); |
677 | else | |
8f23b0b3 | 678 | snprintf(buf, sizeof(buf), "%ld.%02ldGiB", |
e0d19036 | 679 | (long)(bytes>>30), |
bd526cee | 680 | (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100) |
e0d19036 NB |
681 | ); |
682 | return buf; | |
683 | } | |
e4965ef8 N |
684 | |
685 | void print_r10_layout(int layout) | |
686 | { | |
687 | int near = layout & 255; | |
688 | int far = (layout >> 8) & 255; | |
689 | int offset = (layout&0x10000); | |
690 | char *sep = ""; | |
691 | ||
692 | if (near != 1) { | |
693 | printf("%s near=%d", sep, near); | |
694 | sep = ","; | |
695 | } | |
696 | if (far != 1) | |
697 | printf("%s %s=%d", sep, offset?"offset":"far", far); | |
698 | if (near*far == 1) | |
699 | printf("NO REDUNDANCY"); | |
700 | } | |
435d4ebb | 701 | #endif |
e0d19036 | 702 | |
5f8097be NB |
703 | unsigned long long calc_array_size(int level, int raid_disks, int layout, |
704 | int chunksize, unsigned long long devsize) | |
577e8448 AK |
705 | { |
706 | devsize &= ~(unsigned long long)((chunksize>>9)-1); | |
707 | return get_data_disks(level, layout, raid_disks) * devsize; | |
708 | } | |
709 | ||
710 | int get_data_disks(int level, int layout, int raid_disks) | |
5f8097be NB |
711 | { |
712 | int data_disks = 0; | |
713 | switch (level) { | |
714 | case 0: data_disks = raid_disks; break; | |
715 | case 1: data_disks = 1; break; | |
716 | case 4: | |
717 | case 5: data_disks = raid_disks - 1; break; | |
718 | case 6: data_disks = raid_disks - 2; break; | |
719 | case 10: data_disks = raid_disks / (layout & 255) / ((layout>>8)&255); | |
720 | break; | |
721 | } | |
577e8448 AK |
722 | |
723 | return data_disks; | |
5f8097be NB |
724 | } |
725 | ||
0e600426 | 726 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) |
e0d19036 NB |
727 | char *get_md_name(int dev) |
728 | { | |
729 | /* find /dev/md%d or /dev/md/%d or make a device /dev/.tmp.md%d */ | |
98c6faba | 730 | /* if dev < 0, want /dev/md/d%d or find mdp in /proc/devices ... */ |
e0d19036 NB |
731 | static char devname[50]; |
732 | struct stat stb; | |
98c6faba | 733 | dev_t rdev; |
dd0781e5 | 734 | char *dn; |
98c6faba NB |
735 | |
736 | if (dev < 0) { | |
dd0781e5 NB |
737 | int mdp = get_mdp_major(); |
738 | if (mdp < 0) return NULL; | |
0df46c2a | 739 | rdev = makedev(mdp, (-1-dev)<<6); |
8f23b0b3 | 740 | snprintf(devname, sizeof(devname), "/dev/md/d%d", -1-dev); |
98c6faba NB |
741 | if (stat(devname, &stb) == 0 |
742 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
743 | && (stb.st_rdev == rdev)) | |
744 | return devname; | |
745 | } else { | |
0df46c2a | 746 | rdev = makedev(MD_MAJOR, dev); |
8f23b0b3 | 747 | snprintf(devname, sizeof(devname), "/dev/md%d", dev); |
98c6faba NB |
748 | if (stat(devname, &stb) == 0 |
749 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
750 | && (stb.st_rdev == rdev)) | |
751 | return devname; | |
752 | ||
8f23b0b3 | 753 | snprintf(devname, sizeof(devname), "/dev/md/%d", dev); |
98c6faba NB |
754 | if (stat(devname, &stb) == 0 |
755 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
756 | && (stb.st_rdev == rdev)) | |
757 | return devname; | |
758 | } | |
16c6fa80 | 759 | dn = map_dev(major(rdev), minor(rdev), 0); |
dd0781e5 NB |
760 | if (dn) |
761 | return dn; | |
8f23b0b3 | 762 | snprintf(devname, sizeof(devname), "/dev/.tmp.md%d", dev); |
e0d19036 | 763 | if (mknod(devname, S_IFBLK | 0600, rdev) == -1) |
dd0781e5 NB |
764 | if (errno != EEXIST) |
765 | return NULL; | |
e0d19036 NB |
766 | |
767 | if (stat(devname, &stb) == 0 | |
768 | && (S_IFMT&stb.st_mode) == S_IFBLK | |
769 | && (stb.st_rdev == rdev)) | |
770 | return devname; | |
771 | unlink(devname); | |
772 | return NULL; | |
773 | } | |
774 | ||
775 | void put_md_name(char *name) | |
776 | { | |
777 | if (strncmp(name, "/dev/.tmp.md", 12)==0) | |
778 | unlink(name); | |
779 | } | |
ea24acd0 | 780 | |
ea24acd0 NB |
781 | int find_free_devnum(int use_partitions) |
782 | { | |
783 | int devnum; | |
784 | for (devnum = 127; devnum != 128; | |
a56fb7ec | 785 | devnum = devnum ? devnum-1 : (1<<20)-1) { |
ea24acd0 NB |
786 | char *dn; |
787 | int _devnum; | |
788 | ||
789 | _devnum = use_partitions ? (-1-devnum) : devnum; | |
790 | if (mddev_busy(_devnum)) | |
791 | continue; | |
792 | /* make sure it is new to /dev too, at least as a | |
793 | * non-standard */ | |
794 | dn = map_dev(dev2major(_devnum), dev2minor(_devnum), 0); | |
795 | if (dn && ! is_standard(dn, NULL)) | |
796 | continue; | |
797 | break; | |
798 | } | |
799 | if (devnum == 128) | |
800 | return NoMdDev; | |
801 | return use_partitions ? (-1-devnum) : devnum; | |
802 | } | |
435d4ebb | 803 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ |
f9ce90ba | 804 | |
8b0dabea NB |
805 | int dev_open(char *dev, int flags) |
806 | { | |
807 | /* like 'open', but if 'dev' matches %d:%d, create a temp | |
808 | * block device and open that | |
809 | */ | |
810 | char *e; | |
811 | int fd = -1; | |
812 | char devname[32]; | |
e81cdd9f | 813 | int major; |
8b0dabea | 814 | int minor; |
e81cdd9f NB |
815 | |
816 | if (!dev) return -1; | |
6df6a774 | 817 | flags |= O_DIRECT; |
e81cdd9f NB |
818 | |
819 | major = strtoul(dev, &e, 0); | |
8b0dabea NB |
820 | if (e > dev && *e == ':' && e[1] && |
821 | (minor = strtoul(e+1, &e, 0)) >= 0 && | |
822 | *e == 0) { | |
6df6a774 N |
823 | char *path = map_dev(major, minor, 0); |
824 | if (path) | |
825 | fd = open(path, flags); | |
826 | if (fd < 0) { | |
827 | snprintf(devname, sizeof(devname), "/dev/.tmp.md.%d:%d:%d", | |
828 | (int)getpid(), major, minor); | |
829 | if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { | |
830 | fd = open(devname, flags); | |
831 | unlink(devname); | |
832 | } | |
833 | } | |
834 | if (fd < 0) { | |
835 | snprintf(devname, sizeof(devname), "/tmp/.tmp.md.%d:%d:%d", | |
836 | (int)getpid(), major, minor); | |
837 | if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) { | |
838 | fd = open(devname, flags); | |
839 | unlink(devname); | |
840 | } | |
8b0dabea NB |
841 | } |
842 | } else | |
6df6a774 | 843 | fd = open(dev, flags); |
8b0dabea NB |
844 | return fd; |
845 | } | |
f9ce90ba | 846 | |
d998b738 | 847 | int open_dev_flags(int devnum, int flags) |
e8a70c89 N |
848 | { |
849 | char buf[20]; | |
850 | ||
851 | sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum)); | |
d998b738 N |
852 | return dev_open(buf, flags); |
853 | } | |
854 | ||
855 | int open_dev(int devnum) | |
856 | { | |
857 | return open_dev_flags(devnum, O_RDONLY); | |
e8a70c89 N |
858 | } |
859 | ||
a931db9e NB |
860 | int open_dev_excl(int devnum) |
861 | { | |
862 | char buf[20]; | |
863 | int i; | |
7187750e | 864 | int flags = O_RDWR; |
a931db9e NB |
865 | |
866 | sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum)); | |
867 | for (i=0 ; i<25 ; i++) { | |
7187750e | 868 | int fd = dev_open(buf, flags|O_EXCL); |
a931db9e NB |
869 | if (fd >= 0) |
870 | return fd; | |
7187750e N |
871 | if (errno == EACCES && flags == O_RDWR) { |
872 | flags = O_RDONLY; | |
873 | continue; | |
874 | } | |
a931db9e NB |
875 | if (errno != EBUSY) |
876 | return fd; | |
877 | usleep(200000); | |
878 | } | |
879 | return -1; | |
880 | } | |
881 | ||
9008ed1c N |
882 | int same_dev(char *one, char *two) |
883 | { | |
884 | struct stat st1, st2; | |
885 | if (stat(one, &st1) != 0) | |
886 | return 0; | |
887 | if (stat(two, &st2) != 0) | |
888 | return 0; | |
889 | if ((st1.st_mode & S_IFMT) != S_IFBLK) | |
890 | return 0; | |
891 | if ((st2.st_mode & S_IFMT) != S_IFBLK) | |
892 | return 0; | |
893 | return st1.st_rdev == st2.st_rdev; | |
894 | } | |
895 | ||
a7c6e3fb | 896 | void wait_for(char *dev, int fd) |
a714580e N |
897 | { |
898 | int i; | |
a7c6e3fb N |
899 | struct stat stb_want; |
900 | ||
901 | if (fstat(fd, &stb_want) != 0 || | |
902 | (stb_want.st_mode & S_IFMT) != S_IFBLK) | |
903 | return; | |
a714580e N |
904 | |
905 | for (i=0 ; i<25 ; i++) { | |
906 | struct stat stb; | |
a7c6e3fb N |
907 | if (stat(dev, &stb) == 0 && |
908 | (stb.st_mode & S_IFMT) == S_IFBLK && | |
909 | (stb.st_rdev == stb_want.st_rdev)) | |
a714580e N |
910 | return; |
911 | usleep(200000); | |
912 | } | |
436305c6 DW |
913 | if (i == 25) |
914 | dprintf("%s: timeout waiting for %s\n", __func__, dev); | |
a714580e N |
915 | } |
916 | ||
0f22b998 N |
917 | struct superswitch *superlist[] = |
918 | { | |
919 | &super0, &super1, | |
920 | &super_ddf, &super_imsm, | |
0592faeb | 921 | &mbr, &gpt, |
0f22b998 | 922 | NULL }; |
f9ce90ba | 923 | |
ea24acd0 | 924 | #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) |
f7dd881f | 925 | |
4725bc31 | 926 | struct supertype *super_by_fd(int fd, char **subarrayp) |
f9ce90ba | 927 | { |
1686dc25 NB |
928 | mdu_array_info_t array; |
929 | int vers; | |
930 | int minor; | |
931 | struct supertype *st = NULL; | |
7e0f6979 | 932 | struct mdinfo *sra; |
142cb9e1 | 933 | char *verstr; |
1686dc25 NB |
934 | char version[20]; |
935 | int i; | |
f7e7067b | 936 | char *subarray = NULL; |
5f7e44b2 | 937 | int container = NoMdDev; |
1686dc25 NB |
938 | |
939 | sra = sysfs_read(fd, 0, GET_VERSION); | |
940 | ||
941 | if (sra) { | |
7e0f6979 NB |
942 | vers = sra->array.major_version; |
943 | minor = sra->array.minor_version; | |
142cb9e1 | 944 | verstr = sra->text_version; |
1686dc25 NB |
945 | } else { |
946 | if (ioctl(fd, GET_ARRAY_INFO, &array)) | |
947 | array.major_version = array.minor_version = 0; | |
948 | vers = array.major_version; | |
949 | minor = array.minor_version; | |
142cb9e1 | 950 | verstr = ""; |
6fbba4c9 | 951 | } |
82d9eba6 | 952 | |
1686dc25 NB |
953 | if (vers != -1) { |
954 | sprintf(version, "%d.%d", vers, minor); | |
955 | verstr = version; | |
6fbba4c9 | 956 | } |
3c558363 | 957 | if (minor == -2 && is_subarray(verstr)) { |
f7e7067b | 958 | char *dev = verstr+1; |
5f7e44b2 | 959 | |
f7e7067b | 960 | subarray = strchr(dev, '/'); |
f7e7067b NB |
961 | if (subarray) |
962 | *subarray++ = '\0'; | |
f7e7067b | 963 | subarray = strdup(subarray); |
5f7e44b2 | 964 | container = devname2devnum(dev); |
f7e7067b NB |
965 | if (sra) |
966 | sysfs_free(sra); | |
5f7e44b2 | 967 | sra = sysfs_read(-1, container, GET_VERSION); |
603f24a0 N |
968 | if (sra && sra->text_version[0]) |
969 | verstr = sra->text_version; | |
970 | else | |
971 | verstr = "-no-metadata-"; | |
f7e7067b NB |
972 | } |
973 | ||
974 | for (i = 0; st == NULL && superlist[i] ; i++) | |
975 | st = superlist[i]->match_metadata_desc(verstr); | |
1686dc25 NB |
976 | |
977 | if (sra) | |
978 | sysfs_free(sra); | |
f7e7067b | 979 | if (st) { |
3b0896f8 | 980 | st->sb = NULL; |
1f49fb3a N |
981 | if (subarrayp) |
982 | *subarrayp = subarray; | |
5f7e44b2 DW |
983 | st->container_dev = container; |
984 | st->devnum = fd2devnum(fd); | |
4725bc31 N |
985 | } else |
986 | free(subarray); | |
5f7e44b2 | 987 | |
82d9eba6 | 988 | return st; |
f9ce90ba | 989 | } |
ea24acd0 NB |
990 | #endif /* !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO) */ |
991 | ||
0f0749ad | 992 | int dev_size_from_id(dev_t id, unsigned long long *size) |
52d5d101 AC |
993 | { |
994 | char buf[20]; | |
995 | int fd; | |
996 | ||
997 | sprintf(buf, "%d:%d", major(id), minor(id)); | |
998 | fd = dev_open(buf, O_RDONLY); | |
999 | if (fd < 0) | |
1000 | return 0; | |
1001 | if (get_dev_size(fd, NULL, size)) { | |
1002 | close(fd); | |
1003 | return 1; | |
1004 | } | |
1005 | close(fd); | |
1006 | return 0; | |
1007 | } | |
f9ce90ba | 1008 | |
159c3a1a | 1009 | struct supertype *dup_super(struct supertype *orig) |
3da92f27 | 1010 | { |
159c3a1a | 1011 | struct supertype *st; |
1686dc25 | 1012 | |
d2ca6449 NB |
1013 | if (!orig) |
1014 | return orig; | |
159c3a1a | 1015 | st = malloc(sizeof(*st)); |
3da92f27 NB |
1016 | if (!st) |
1017 | return st; | |
ef609477 | 1018 | memset(st, 0, sizeof(*st)); |
159c3a1a NB |
1019 | st->ss = orig->ss; |
1020 | st->max_devs = orig->max_devs; | |
1021 | st->minor_version = orig->minor_version; | |
1022 | st->sb = NULL; | |
1023 | st->info = NULL; | |
1024 | return st; | |
3da92f27 NB |
1025 | } |
1026 | ||
54887ad8 | 1027 | struct supertype *guess_super_type(int fd, enum guess_types guess_type) |
f9ce90ba NB |
1028 | { |
1029 | /* try each load_super to find the best match, | |
1030 | * and return the best superswitch | |
1031 | */ | |
82d9eba6 NB |
1032 | struct superswitch *ss; |
1033 | struct supertype *st; | |
f21e18ca | 1034 | time_t besttime = 0; |
570c0542 | 1035 | int bestsuper = -1; |
f9ce90ba NB |
1036 | int i; |
1037 | ||
82d9eba6 | 1038 | st = malloc(sizeof(*st)); |
d1d599ea N |
1039 | memset(st, 0, sizeof(*st)); |
1040 | st->container_dev = NoMdDev; | |
1041 | ||
f9ce90ba NB |
1042 | for (i=0 ; superlist[i]; i++) { |
1043 | int rv; | |
1044 | ss = superlist[i]; | |
54887ad8 N |
1045 | if (guess_type == guess_array && ss->add_to_super == NULL) |
1046 | continue; | |
1047 | if (guess_type == guess_partitions && ss->add_to_super != NULL) | |
1048 | continue; | |
ef609477 | 1049 | memset(st, 0, sizeof(*st)); |
df3346e6 | 1050 | st->ignore_hw_compat = 1; |
3da92f27 | 1051 | rv = ss->load_super(st, fd, NULL); |
570c0542 NB |
1052 | if (rv == 0) { |
1053 | struct mdinfo info; | |
a5d85af7 | 1054 | st->ss->getinfo_super(st, &info, NULL); |
570c0542 NB |
1055 | if (bestsuper == -1 || |
1056 | besttime < info.array.ctime) { | |
1057 | bestsuper = i; | |
1058 | besttime = info.array.ctime; | |
570c0542 | 1059 | } |
3da92f27 | 1060 | ss->free_super(st); |
570c0542 NB |
1061 | } |
1062 | } | |
1063 | if (bestsuper != -1) { | |
1064 | int rv; | |
ef609477 | 1065 | memset(st, 0, sizeof(*st)); |
df3346e6 | 1066 | st->ignore_hw_compat = 1; |
3da92f27 | 1067 | rv = superlist[bestsuper]->load_super(st, fd, NULL); |
f9ce90ba | 1068 | if (rv == 0) { |
5e747af2 | 1069 | superlist[bestsuper]->free_super(st); |
df3346e6 | 1070 | st->ignore_hw_compat = 0; |
82d9eba6 | 1071 | return st; |
f9ce90ba NB |
1072 | } |
1073 | } | |
570c0542 | 1074 | free(st); |
f9ce90ba NB |
1075 | return NULL; |
1076 | } | |
fe6729fa | 1077 | |
beae1dfe NB |
1078 | /* Return size of device in bytes */ |
1079 | int get_dev_size(int fd, char *dname, unsigned long long *sizep) | |
1080 | { | |
1081 | unsigned long long ldsize; | |
c2c9bb6f NB |
1082 | struct stat st; |
1083 | ||
1084 | if (fstat(fd, &st) != -1 && S_ISREG(st.st_mode)) | |
1085 | ldsize = (unsigned long long)st.st_size; | |
1086 | else | |
beae1dfe NB |
1087 | #ifdef BLKGETSIZE64 |
1088 | if (ioctl(fd, BLKGETSIZE64, &ldsize) != 0) | |
1089 | #endif | |
1090 | { | |
1091 | unsigned long dsize; | |
1092 | if (ioctl(fd, BLKGETSIZE, &dsize) == 0) { | |
1093 | ldsize = dsize; | |
1094 | ldsize <<= 9; | |
1095 | } else { | |
1096 | if (dname) | |
1097 | fprintf(stderr, Name ": Cannot get size of %s: %s\b", | |
1098 | dname, strerror(errno)); | |
1099 | return 0; | |
1100 | } | |
1101 | } | |
1102 | *sizep = ldsize; | |
1103 | return 1; | |
1104 | } | |
8fac0577 | 1105 | |
3a371610 N |
1106 | /* Return true if this can only be a container, not a member device. |
1107 | * i.e. is and md device and size is zero | |
1108 | */ | |
1109 | int must_be_container(int fd) | |
1110 | { | |
1111 | unsigned long long size; | |
1112 | if (md_get_version(fd) < 0) | |
1113 | return 0; | |
1114 | if (get_dev_size(fd, NULL, &size) == 0) | |
1115 | return 1; | |
1116 | if (size == 0) | |
1117 | return 1; | |
1118 | return 0; | |
1119 | } | |
034b203a TM |
1120 | |
1121 | /* Sets endofpart parameter to the last block used by the last GPT partition on the device. | |
1122 | * Returns: 1 if successful | |
1123 | * -1 for unknown partition type | |
1124 | * 0 for other errors | |
1125 | */ | |
1126 | static int get_gpt_last_partition_end(int fd, unsigned long long *endofpart) | |
1127 | { | |
056b331e | 1128 | struct GPT gpt; |
034b203a | 1129 | unsigned char empty_gpt_entry[16]= {0}; |
73e658d8 | 1130 | struct GPT_part_entry part; |
034b203a TM |
1131 | unsigned long long curr_part_end; |
1132 | unsigned all_partitions, entry_size; | |
f21e18ca | 1133 | unsigned part_nr; |
034b203a TM |
1134 | |
1135 | *endofpart = 0; | |
1136 | ||
056b331e | 1137 | BUILD_BUG_ON(sizeof(gpt) != 512); |
73e658d8 | 1138 | /* skip protective MBR */ |
034b203a | 1139 | lseek(fd, 512, SEEK_SET); |
73e658d8 | 1140 | /* read GPT header */ |
056b331e | 1141 | if (read(fd, &gpt, 512) != 512) |
034b203a TM |
1142 | return 0; |
1143 | ||
1144 | /* get the number of partition entries and the entry size */ | |
056b331e N |
1145 | all_partitions = __le32_to_cpu(gpt.part_cnt); |
1146 | entry_size = __le32_to_cpu(gpt.part_size); | |
034b203a TM |
1147 | |
1148 | /* Check GPT signature*/ | |
056b331e | 1149 | if (gpt.magic != GPT_SIGNATURE_MAGIC) |
034b203a TM |
1150 | return -1; |
1151 | ||
1152 | /* sanity checks */ | |
1153 | if (all_partitions > 1024 || | |
1154 | entry_size > 512) | |
1155 | return -1; | |
1156 | ||
034b203a | 1157 | for (part_nr=0; part_nr < all_partitions; part_nr++) { |
73e658d8 LB |
1158 | /* read partition entry */ |
1159 | if (read(fd, &part, entry_size) != (ssize_t)entry_size) | |
1160 | return 0; | |
1161 | ||
034b203a | 1162 | /* is this valid partition? */ |
73e658d8 | 1163 | if (memcmp(part.type_guid, empty_gpt_entry, 16) != 0) { |
034b203a | 1164 | /* check the last lba for the current partition */ |
73e658d8 | 1165 | curr_part_end = __le64_to_cpu(part.ending_lba); |
034b203a TM |
1166 | if (curr_part_end > *endofpart) |
1167 | *endofpart = curr_part_end; | |
1168 | } | |
1169 | ||
034b203a TM |
1170 | } |
1171 | return 1; | |
1172 | } | |
1173 | ||
1174 | /* Sets endofpart parameter to the last block used by the last partition on the device. | |
1175 | * Returns: 1 if successful | |
1176 | * -1 for unknown partition type | |
1177 | * 0 for other errors | |
1178 | */ | |
1179 | static int get_last_partition_end(int fd, unsigned long long *endofpart) | |
1180 | { | |
056b331e | 1181 | struct MBR boot_sect; |
034b203a TM |
1182 | struct MBR_part_record *part; |
1183 | unsigned long long curr_part_end; | |
f21e18ca | 1184 | unsigned part_nr; |
034b203a TM |
1185 | int retval = 0; |
1186 | ||
1187 | *endofpart = 0; | |
1188 | ||
056b331e | 1189 | BUILD_BUG_ON(sizeof(boot_sect) != 512); |
034b203a TM |
1190 | /* read MBR */ |
1191 | lseek(fd, 0, 0); | |
056b331e | 1192 | if (read(fd, &boot_sect, 512) != 512) |
034b203a TM |
1193 | goto abort; |
1194 | ||
1195 | /* check MBP signature */ | |
056b331e | 1196 | if (boot_sect.magic == MBR_SIGNATURE_MAGIC) { |
034b203a TM |
1197 | retval = 1; |
1198 | /* found the correct signature */ | |
056b331e | 1199 | part = boot_sect.parts; |
034b203a TM |
1200 | |
1201 | for (part_nr=0; part_nr < MBR_PARTITIONS; part_nr++) { | |
1202 | /* check for GPT type */ | |
1203 | if (part->part_type == MBR_GPT_PARTITION_TYPE) { | |
1204 | retval = get_gpt_last_partition_end(fd, endofpart); | |
1205 | break; | |
1206 | } | |
1207 | /* check the last used lba for the current partition */ | |
1208 | curr_part_end = __le32_to_cpu(part->first_sect_lba) + | |
1209 | __le32_to_cpu(part->blocks_num); | |
1210 | if (curr_part_end > *endofpart) | |
1211 | *endofpart = curr_part_end; | |
1212 | ||
1213 | part++; | |
1214 | } | |
1215 | } else { | |
1216 | /* Unknown partition table */ | |
1217 | retval = -1; | |
1218 | } | |
1219 | abort: | |
1220 | return retval; | |
1221 | } | |
1222 | ||
53ed6ac3 KW |
1223 | int check_partitions(int fd, char *dname, unsigned long long freesize, |
1224 | unsigned long long size) | |
034b203a TM |
1225 | { |
1226 | /* | |
1227 | * Check where the last partition ends | |
1228 | */ | |
1229 | unsigned long long endofpart; | |
1230 | int ret; | |
1231 | ||
1232 | if ((ret = get_last_partition_end(fd, &endofpart)) > 0) { | |
1233 | /* There appears to be a partition table here */ | |
1234 | if (freesize == 0) { | |
1235 | /* partitions will not be visible in new device */ | |
1236 | fprintf(stderr, | |
1237 | Name ": partition table exists on %s but will be lost or\n" | |
1238 | " meaningless after creating array\n", | |
1239 | dname); | |
1240 | return 1; | |
1241 | } else if (endofpart > freesize) { | |
1242 | /* last partition overlaps metadata */ | |
1243 | fprintf(stderr, | |
1244 | Name ": metadata will over-write last partition on %s.\n", | |
1245 | dname); | |
1246 | return 1; | |
53ed6ac3 KW |
1247 | } else if (size && endofpart > size) { |
1248 | /* partitions will be truncated in new device */ | |
1249 | fprintf(stderr, | |
1250 | Name ": array size is too small to cover all partitions on %s.\n", | |
1251 | dname); | |
1252 | return 1; | |
034b203a TM |
1253 | } |
1254 | } | |
1255 | return 0; | |
1256 | } | |
1257 | ||
8382f19b NB |
1258 | void get_one_disk(int mdfd, mdu_array_info_t *ainf, mdu_disk_info_t *disk) |
1259 | { | |
1260 | int d; | |
9e6d9291 | 1261 | |
8382f19b | 1262 | ioctl(mdfd, GET_ARRAY_INFO, ainf); |
9e6d9291 N |
1263 | for (d = 0 ; d < 1024 ; d++) { |
1264 | if (ioctl(mdfd, GET_DISK_INFO, disk) == 0 && | |
1265 | (disk->major || disk->minor)) | |
8382f19b | 1266 | return; |
9e6d9291 | 1267 | } |
8382f19b | 1268 | } |
63152c1b | 1269 | |
a322f70c DW |
1270 | int open_container(int fd) |
1271 | { | |
1272 | /* 'fd' is a block device. Find out if it is in use | |
1273 | * by a container, and return an open fd on that container. | |
1274 | */ | |
1275 | char path[256]; | |
1276 | char *e; | |
1277 | DIR *dir; | |
1278 | struct dirent *de; | |
1279 | int dfd, n; | |
1280 | char buf[200]; | |
1281 | int major, minor; | |
1282 | struct stat st; | |
1283 | ||
1284 | if (fstat(fd, &st) != 0) | |
1285 | return -1; | |
1286 | sprintf(path, "/sys/dev/block/%d:%d/holders", | |
1287 | (int)major(st.st_rdev), (int)minor(st.st_rdev)); | |
1288 | e = path + strlen(path); | |
1289 | ||
1290 | dir = opendir(path); | |
1291 | if (!dir) | |
1292 | return -1; | |
1293 | while ((de = readdir(dir))) { | |
1294 | if (de->d_ino == 0) | |
1295 | continue; | |
1296 | if (de->d_name[0] == '.') | |
1297 | continue; | |
1298 | sprintf(e, "/%s/dev", de->d_name); | |
1299 | dfd = open(path, O_RDONLY); | |
1300 | if (dfd < 0) | |
1301 | continue; | |
1302 | n = read(dfd, buf, sizeof(buf)); | |
1303 | close(dfd); | |
f21e18ca | 1304 | if (n <= 0 || (unsigned)n >= sizeof(buf)) |
a322f70c DW |
1305 | continue; |
1306 | buf[n] = 0; | |
1307 | if (sscanf(buf, "%d:%d", &major, &minor) != 2) | |
1308 | continue; | |
1309 | sprintf(buf, "%d:%d", major, minor); | |
1310 | dfd = dev_open(buf, O_RDONLY); | |
1311 | if (dfd >= 0) { | |
1312 | closedir(dir); | |
1313 | return dfd; | |
1314 | } | |
1315 | } | |
355726fa | 1316 | closedir(dir); |
a322f70c DW |
1317 | return -1; |
1318 | } | |
1319 | ||
33414a01 DW |
1320 | struct superswitch *version_to_superswitch(char *vers) |
1321 | { | |
1322 | int i; | |
1323 | ||
1324 | for (i = 0; superlist[i]; i++) { | |
1325 | struct superswitch *ss = superlist[i]; | |
1326 | ||
1327 | if (strcmp(vers, ss->name) == 0) | |
1328 | return ss; | |
1329 | } | |
1330 | ||
1331 | return NULL; | |
1332 | } | |
1333 | ||
1334 | int is_container_member(struct mdstat_ent *mdstat, char *container) | |
1335 | { | |
1336 | if (mdstat->metadata_version == NULL || | |
1337 | strncmp(mdstat->metadata_version, "external:", 9) != 0 || | |
1338 | !is_subarray(mdstat->metadata_version+9) || | |
1339 | strncmp(mdstat->metadata_version+10, container, strlen(container)) != 0 || | |
1340 | mdstat->metadata_version[10+strlen(container)] != '/') | |
1341 | return 0; | |
1342 | ||
1343 | return 1; | |
1344 | } | |
1345 | ||
1346 | int is_subarray_active(char *subarray, char *container) | |
1347 | { | |
1348 | struct mdstat_ent *mdstat = mdstat_read(0, 0); | |
1349 | struct mdstat_ent *ent; | |
1350 | ||
e5408a32 DW |
1351 | for (ent = mdstat; ent; ent = ent->next) |
1352 | if (is_container_member(ent, container)) | |
e5e5d7ce | 1353 | if (strcmp(to_subarray(ent, container), subarray) == 0) |
33414a01 | 1354 | break; |
33414a01 DW |
1355 | |
1356 | free_mdstat(mdstat); | |
1357 | ||
1358 | return ent != NULL; | |
1359 | } | |
1360 | ||
1361 | /* open_subarray - opens a subarray in a container | |
1362 | * @dev: container device name | |
feab51f8 | 1363 | * @st: empty supertype |
33414a01 DW |
1364 | * @quiet: block reporting errors flag |
1365 | * | |
1366 | * On success returns an fd to a container and fills in *st | |
1367 | */ | |
feab51f8 | 1368 | int open_subarray(char *dev, char *subarray, struct supertype *st, int quiet) |
33414a01 DW |
1369 | { |
1370 | struct mdinfo *mdi; | |
a951a4f7 | 1371 | struct mdinfo *info; |
33414a01 DW |
1372 | int fd, err = 1; |
1373 | ||
1374 | fd = open(dev, O_RDWR|O_EXCL); | |
1375 | if (fd < 0) { | |
1376 | if (!quiet) | |
1377 | fprintf(stderr, Name ": Couldn't open %s, aborting\n", | |
1378 | dev); | |
b990032d | 1379 | return -1; |
33414a01 DW |
1380 | } |
1381 | ||
1382 | st->devnum = fd2devnum(fd); | |
1383 | if (st->devnum == NoMdDev) { | |
1384 | if (!quiet) | |
1385 | fprintf(stderr, | |
1386 | Name ": Failed to determine device number for %s\n", | |
1387 | dev); | |
1388 | goto close_fd; | |
1389 | } | |
1390 | ||
1391 | mdi = sysfs_read(fd, st->devnum, GET_VERSION|GET_LEVEL); | |
1392 | if (!mdi) { | |
1393 | if (!quiet) | |
1394 | fprintf(stderr, Name ": Failed to read sysfs for %s\n", | |
1395 | dev); | |
1396 | goto close_fd; | |
1397 | } | |
1398 | ||
1399 | if (mdi->array.level != UnSet) { | |
1400 | if (!quiet) | |
1401 | fprintf(stderr, Name ": %s is not a container\n", dev); | |
1402 | goto free_sysfs; | |
1403 | } | |
1404 | ||
1405 | st->ss = version_to_superswitch(mdi->text_version); | |
1406 | if (!st->ss) { | |
1407 | if (!quiet) | |
1408 | fprintf(stderr, | |
1409 | Name ": Operation not supported for %s metadata\n", | |
1410 | mdi->text_version); | |
1411 | goto free_sysfs; | |
1412 | } | |
1413 | ||
1414 | st->devname = devnum2devname(st->devnum); | |
1415 | if (!st->devname) { | |
1416 | if (!quiet) | |
1417 | fprintf(stderr, Name ": Failed to allocate device name\n"); | |
1418 | goto free_sysfs; | |
1419 | } | |
1420 | ||
db20d413 | 1421 | if (!st->ss->load_container) { |
33414a01 | 1422 | if (!quiet) |
db20d413 | 1423 | fprintf(stderr, Name ": %s is not a container\n", dev); |
33414a01 DW |
1424 | goto free_name; |
1425 | } | |
1426 | ||
db20d413 | 1427 | if (st->ss->load_container(st, fd, NULL)) { |
33414a01 | 1428 | if (!quiet) |
db20d413 N |
1429 | fprintf(stderr, Name ": Failed to load metadata for %s\n", |
1430 | dev); | |
1431 | goto free_name; | |
33414a01 DW |
1432 | } |
1433 | ||
a951a4f7 N |
1434 | info = st->ss->container_content(st, subarray); |
1435 | if (!info) { | |
1436 | if (!quiet) | |
1437 | fprintf(stderr, Name ": Failed to find subarray-%s in %s\n", | |
1438 | subarray, dev); | |
1439 | goto free_super; | |
1440 | } | |
1441 | free(info); | |
1442 | ||
33414a01 DW |
1443 | err = 0; |
1444 | ||
1445 | free_super: | |
1446 | if (err) | |
1447 | st->ss->free_super(st); | |
1448 | free_name: | |
1449 | if (err) | |
1450 | free(st->devname); | |
1451 | free_sysfs: | |
1452 | sysfs_free(mdi); | |
1453 | close_fd: | |
1454 | if (err) | |
1455 | close(fd); | |
1456 | ||
1457 | if (err) | |
1458 | return -1; | |
1459 | else | |
1460 | return fd; | |
1461 | } | |
1462 | ||
7801ac20 N |
1463 | int add_disk(int mdfd, struct supertype *st, |
1464 | struct mdinfo *sra, struct mdinfo *info) | |
1465 | { | |
1466 | /* Add a device to an array, in one of 2 ways. */ | |
1467 | int rv; | |
1468 | #ifndef MDASSEMBLE | |
1469 | if (st->ss->external) { | |
d23534e4 DW |
1470 | if (info->disk.state & (1<<MD_DISK_SYNC)) |
1471 | info->recovery_start = MaxSector; | |
1472 | else | |
1473 | info->recovery_start = 0; | |
2904b26f | 1474 | rv = sysfs_add_disk(sra, info, 0); |
7801ac20 N |
1475 | if (! rv) { |
1476 | struct mdinfo *sd2; | |
f35f2525 N |
1477 | for (sd2 = sra->devs; sd2; sd2=sd2->next) |
1478 | if (sd2 == info) | |
1479 | break; | |
1480 | if (sd2 == NULL) { | |
1481 | sd2 = malloc(sizeof(*sd2)); | |
1482 | *sd2 = *info; | |
1483 | sd2->next = sra->devs; | |
1484 | sra->devs = sd2; | |
1485 | } | |
7801ac20 N |
1486 | } |
1487 | } else | |
1488 | #endif | |
1489 | rv = ioctl(mdfd, ADD_NEW_DISK, &info->disk); | |
1490 | return rv; | |
1491 | } | |
1492 | ||
de6ae750 N |
1493 | int remove_disk(int mdfd, struct supertype *st, |
1494 | struct mdinfo *sra, struct mdinfo *info) | |
1495 | { | |
1496 | int rv; | |
1497 | /* Remove the disk given by 'info' from the array */ | |
1498 | #ifndef MDASSEMBLE | |
1499 | if (st->ss->external) | |
1500 | rv = sysfs_set_str(sra, info, "slot", "none"); | |
1501 | else | |
1502 | #endif | |
1503 | rv = ioctl(mdfd, HOT_REMOVE_DISK, makedev(info->disk.major, | |
1504 | info->disk.minor)); | |
1505 | return rv; | |
1506 | } | |
1507 | ||
f35f2525 N |
1508 | int set_array_info(int mdfd, struct supertype *st, struct mdinfo *info) |
1509 | { | |
1510 | /* Initialise kernel's knowledge of array. | |
1511 | * This varies between externally managed arrays | |
1512 | * and older kernels | |
1513 | */ | |
1514 | int vers = md_get_version(mdfd); | |
1515 | int rv; | |
1516 | ||
1517 | #ifndef MDASSEMBLE | |
1518 | if (st->ss->external) | |
1519 | rv = sysfs_set_array(info, vers); | |
1520 | else | |
1521 | #endif | |
1522 | if ((vers % 100) >= 1) { /* can use different versions */ | |
1523 | mdu_array_info_t inf; | |
1524 | memset(&inf, 0, sizeof(inf)); | |
1525 | inf.major_version = info->array.major_version; | |
1526 | inf.minor_version = info->array.minor_version; | |
1527 | rv = ioctl(mdfd, SET_ARRAY_INFO, &inf); | |
1528 | } else | |
1529 | rv = ioctl(mdfd, SET_ARRAY_INFO, NULL); | |
1530 | return rv; | |
1531 | } | |
1532 | ||
1e5c6983 DW |
1533 | unsigned long long min_recovery_start(struct mdinfo *array) |
1534 | { | |
1535 | /* find the minimum recovery_start in an array for metadata | |
1536 | * formats that only record per-array recovery progress instead | |
1537 | * of per-device | |
1538 | */ | |
1539 | unsigned long long recovery_start = MaxSector; | |
1540 | struct mdinfo *d; | |
1541 | ||
1542 | for (d = array->devs; d; d = d->next) | |
1543 | recovery_start = min(recovery_start, d->recovery_start); | |
1544 | ||
1545 | return recovery_start; | |
1546 | } | |
1547 | ||
24f6f99b | 1548 | int mdmon_pid(int devnum) |
a931db9e NB |
1549 | { |
1550 | char path[100]; | |
1551 | char pid[10]; | |
1552 | int fd; | |
1553 | int n; | |
10013317 PHC |
1554 | char *devname = devnum2devname(devnum); |
1555 | ||
753cf905 | 1556 | sprintf(path, "%s/%s.pid", MDMON_DIR, devname); |
10013317 PHC |
1557 | free(devname); |
1558 | ||
24f6f99b | 1559 | fd = open(path, O_RDONLY | O_NOATIME, 0); |
a931db9e NB |
1560 | |
1561 | if (fd < 0) | |
cf556303 | 1562 | return -1; |
a931db9e NB |
1563 | n = read(fd, pid, 9); |
1564 | close(fd); | |
1565 | if (n <= 0) | |
cf556303 | 1566 | return -1; |
24f6f99b | 1567 | return atoi(pid); |
a931db9e NB |
1568 | } |
1569 | ||
24f6f99b | 1570 | int mdmon_running(int devnum) |
a931db9e | 1571 | { |
24f6f99b N |
1572 | int pid = mdmon_pid(devnum); |
1573 | if (pid <= 0) | |
a931db9e | 1574 | return 0; |
24f6f99b | 1575 | if (kill(pid, 0) == 0) |
a931db9e NB |
1576 | return 1; |
1577 | return 0; | |
1578 | } | |
1579 | ||
8850ee3e N |
1580 | int start_mdmon(int devnum) |
1581 | { | |
1913c325 | 1582 | int i, skipped; |
44d2e365 | 1583 | int len; |
9fe32043 N |
1584 | pid_t pid; |
1585 | int status; | |
44d2e365 N |
1586 | char pathbuf[1024]; |
1587 | char *paths[4] = { | |
1588 | pathbuf, | |
1589 | "/sbin/mdmon", | |
1590 | "mdmon", | |
1591 | NULL | |
1592 | }; | |
8850ee3e | 1593 | |
40ebbb9c | 1594 | if (check_env("MDADM_NO_MDMON")) |
8850ee3e N |
1595 | return 0; |
1596 | ||
44d2e365 N |
1597 | len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf)); |
1598 | if (len > 0) { | |
1599 | char *sl; | |
1600 | pathbuf[len] = 0; | |
1601 | sl = strrchr(pathbuf, '/'); | |
1602 | if (sl) | |
1603 | sl++; | |
1604 | else | |
1605 | sl = pathbuf; | |
1606 | strcpy(sl, "mdmon"); | |
1607 | } else | |
1608 | pathbuf[0] = '\0'; | |
1609 | ||
8850ee3e N |
1610 | switch(fork()) { |
1611 | case 0: | |
1612 | /* FIXME yuk. CLOSE_EXEC?? */ | |
1913c325 N |
1613 | skipped = 0; |
1614 | for (i=3; skipped < 20; i++) | |
1615 | if (close(i) < 0) | |
1616 | skipped++; | |
1617 | else | |
1618 | skipped = 0; | |
1619 | ||
44d2e365 N |
1620 | for (i=0; paths[i]; i++) |
1621 | if (paths[i][0]) | |
1622 | execl(paths[i], "mdmon", | |
e8a70c89 N |
1623 | devnum2devname(devnum), |
1624 | NULL); | |
8850ee3e N |
1625 | exit(1); |
1626 | case -1: fprintf(stderr, Name ": cannot run mdmon. " | |
1627 | "Array remains readonly\n"); | |
1628 | return -1; | |
9fe32043 N |
1629 | default: /* parent - good */ |
1630 | pid = wait(&status); | |
1631 | if (pid < 0 || status != 0) | |
1632 | return -1; | |
8850ee3e N |
1633 | } |
1634 | return 0; | |
1635 | } | |
1636 | ||
40ebbb9c | 1637 | int check_env(char *name) |
5dcfcb71 | 1638 | { |
40ebbb9c | 1639 | char *val = getenv(name); |
5dcfcb71 DW |
1640 | |
1641 | if (val && atoi(val) == 1) | |
1642 | return 1; | |
1643 | ||
1644 | return 0; | |
1645 | } | |
1646 | ||
148acb7b DW |
1647 | __u32 random32(void) |
1648 | { | |
1649 | __u32 rv; | |
1650 | int rfd = open("/dev/urandom", O_RDONLY); | |
1651 | if (rfd < 0 || read(rfd, &rv, 4) != 4) | |
1652 | rv = random(); | |
1653 | if (rfd >= 0) | |
1654 | close(rfd); | |
1655 | return rv; | |
1656 | } | |
1657 | ||
0e600426 | 1658 | #ifndef MDASSEMBLE |
edd8d13c NB |
1659 | int flush_metadata_updates(struct supertype *st) |
1660 | { | |
1661 | int sfd; | |
1662 | if (!st->updates) { | |
1663 | st->update_tail = NULL; | |
1664 | return -1; | |
1665 | } | |
1666 | ||
1667 | sfd = connect_monitor(devnum2devname(st->container_dev)); | |
1668 | if (sfd < 0) | |
1669 | return -1; | |
1670 | ||
1671 | while (st->updates) { | |
1672 | struct metadata_update *mu = st->updates; | |
1673 | st->updates = mu->next; | |
1674 | ||
1675 | send_message(sfd, mu, 0); | |
1676 | wait_reply(sfd, 0); | |
1677 | free(mu->buf); | |
1678 | free(mu); | |
1679 | } | |
1680 | ack(sfd, 0); | |
1681 | wait_reply(sfd, 0); | |
1682 | close(sfd); | |
1683 | st->update_tail = NULL; | |
1684 | return 0; | |
1685 | } | |
1686 | ||
1687 | void append_metadata_update(struct supertype *st, void *buf, int len) | |
1688 | { | |
1689 | ||
1690 | struct metadata_update *mu = malloc(sizeof(*mu)); | |
1691 | ||
1692 | mu->buf = buf; | |
1693 | mu->len = len; | |
1694 | mu->space = NULL; | |
cb23f1f4 | 1695 | mu->space_list = NULL; |
edd8d13c NB |
1696 | mu->next = NULL; |
1697 | *st->update_tail = mu; | |
1698 | st->update_tail = &mu->next; | |
1699 | } | |
0e600426 | 1700 | #endif /* MDASSEMBLE */ |
a931db9e | 1701 | |
fe6729fa NB |
1702 | #ifdef __TINYC__ |
1703 | /* tinyc doesn't optimize this check in ioctl.h out ... */ | |
1704 | unsigned int __invalid_size_argument_for_IOC = 0; | |
1705 | #endif | |
1706 | ||
6d11ec6f AK |
1707 | int experimental(void) |
1708 | { | |
1709 | if (check_env("MDADM_EXPERIMENTAL")) | |
1710 | return 1; | |
1711 | else { | |
1712 | fprintf(stderr, Name ": To use this feature MDADM_EXPERIMENTAL enviroment variable has to defined.\n"); | |
1713 | return 0; | |
1714 | } | |
1715 | } | |
1716 | ||
326727d9 AC |
1717 | /* Pick all spares matching given criteria from a container |
1718 | * if min_size == 0 do not check size | |
1719 | * if domlist == NULL do not check domains | |
1720 | * if spare_group given add it to domains of each spare | |
1721 | * metadata allows to test domains using metadata of destination array */ | |
1722 | struct mdinfo *container_choose_spares(struct supertype *st, | |
1723 | unsigned long long min_size, | |
1724 | struct domainlist *domlist, | |
1725 | char *spare_group, | |
1726 | const char *metadata, int get_one) | |
1727 | { | |
1728 | struct mdinfo *d, **dp, *disks = NULL; | |
1729 | ||
1730 | /* get list of all disks in container */ | |
1731 | if (st->ss->getinfo_super_disks) | |
1732 | disks = st->ss->getinfo_super_disks(st); | |
1733 | ||
1734 | if (!disks) | |
1735 | return disks; | |
1736 | /* find spare devices on the list */ | |
1737 | dp = &disks->devs; | |
1738 | disks->array.spare_disks = 0; | |
1739 | while (*dp) { | |
1740 | int found = 0; | |
1741 | d = *dp; | |
1742 | if (d->disk.state == 0) { | |
1743 | /* check if size is acceptable */ | |
1744 | unsigned long long dev_size; | |
1745 | dev_t dev = makedev(d->disk.major,d->disk.minor); | |
1746 | ||
1747 | if (!min_size || | |
1748 | (dev_size_from_id(dev, &dev_size) && | |
1749 | dev_size >= min_size)) | |
1750 | found = 1; | |
1751 | /* check if domain matches */ | |
1752 | if (found && domlist) { | |
1753 | struct dev_policy *pol = devnum_policy(dev); | |
1754 | if (spare_group) | |
1755 | pol_add(&pol, pol_domain, | |
1756 | spare_group, NULL); | |
e5508b36 | 1757 | if (domain_test(domlist, pol, metadata) != 1) |
326727d9 AC |
1758 | found = 0; |
1759 | dev_policy_free(pol); | |
1760 | } | |
1761 | } | |
1762 | if (found) { | |
1763 | dp = &d->next; | |
1764 | disks->array.spare_disks++; | |
1765 | if (get_one) { | |
1766 | sysfs_free(*dp); | |
1767 | d->next = NULL; | |
1768 | } | |
1769 | } else { | |
1770 | *dp = d->next; | |
1771 | d->next = NULL; | |
1772 | sysfs_free(d); | |
1773 | } | |
1774 | } | |
1775 | return disks; | |
1776 | } |